川消：干粉系列消防车实战指南

来源：http://www.cx-fire.com/ 日期：2026-05-03

　　为规范干粉系列消防车实操流程，协助消防救援人员切实提升实战处置能力，有效防范装备操作安全风险、延长装备使用寿命，结合一线实战处置需求、装备实际构造及国家相关标准要求，特编制本实战指南。本指南覆盖干粉消防车核心知识、标准实操流程、日常维护保养及常见故障排除等关键内容，严格遵循GB7956.1《消防车第1部分通用技术条件》、GB7956.2《消防车第2部分水罐消防车》、GB7956.3《消防车第3部分泡沫消防车》、GB7956.4《消防车第4部分干粉消防车》系列国家标准，可基本满足各类消防救援人员岗前培训、日常技能巩固及实战应急演练的学习需求，助力救援人员熟练掌握装备操作技巧、提升实战处置水平，确保火场处置高效、安全、规范。也有助于消防车设计制造人员了解车辆结构与功能以及使用规范，使设计制造更贴合实战需求。

　　In order to standardize the practical operation process of dry powder series fire trucks, assist firefighting and rescue personnel in effectively improving their practical disposal capabilities, prevent equipment operation safety risks, and extend equipment service life, this practical guide is specially formulated based on the needs of frontline practical disposal, actual equipment structure, and relevant national standards requirements. This guide covers the core knowledge, standard practical operation process, daily maintenance, common troubleshooting and other key contents of dry powder fire engines. It strictly follows the national standards of GB7956.1 Fire fighting Vehicles Part 1 General Technical Conditions, GB7956.2 Fire fighting Vehicles Part 2 Water Tank Fire fighting Vehicles, GB7956.3 Fire fighting Vehicles Part 3 foam Fire fighting Vehicles, and GB7956.4 Fire fighting Vehicles Part 4 Dry Powder Fire fighting Vehicles. It can basically meet the learning needs of all kinds of fire rescue personnel for pre job training, daily skill consolidation and practical emergency drills, help rescue personnel to master equipment operation skills, improve the level of actual combat disposal, and ensure efficient, safe and standardized fire site disposal. It also helps fire truck designers and manufacturers understand the structure, function, and usage standards of the vehicle, making the design and manufacturing more in line with practical needs.

　　一、干粉消防车核心认知与实操要点

　　1、 Core cognition and practical points of dry powder fire trucks

　　（一）概念

　　（1） Concept

　　干粉消防车是以干粉为核心灭火剂，配套高压氮气体动力系统，可快速喷射干粉、高效处置各类可燃固体、液体、气体火灾的罐类消防车。该车型具备机动灵活、灭火效率高、适用场景广的突出优势，是消防救援队伍快速处置初期火情、应对复杂火灾现场的核心装备，广泛应用于石油化工园区、居民社区、工业园区等各类火灾处置场景，在火灾防控与应急救援工作中发挥着不可替代的关键作用。

　　Dry powder fire truck is a tank type fire truck that uses dry powder as the core extinguishing agent and is equipped with a high-pressure nitrogen gas power system. It can quickly spray dry powder and efficiently handle various combustible solid, liquid, and gas fires. This model has outstanding advantages such as maneuverability, high fire extinguishing efficiency, and wide applicability. It is the core equipment for fire rescue teams to quickly deal with initial fires and respond to complex fire scenes. It is widely used in various fire disposal scenarios such as petrochemical parks, residential communities, and industrial parks, and plays an irreplaceable key role in fire prevention and emergency rescue work.

　　干粉消防车整体外观图

　　Overall appearance of dry powder fire truck

　　（二）用途

　　（2） Purpose:

　　结合火灾分类标准（A类：固体物质火灾、B类：液体或可熔化固体物质火灾、C类：气体火灾、E类：带电设备火灾），三类干粉系列消防车的适用火灾类别及具体场景明确如下：1.干粉消防车：核心适用于B类（石油、化工原料、油漆、有机溶剂等易燃液体火灾）、C类（天然气、煤气、液化气等可燃气体火灾）、E类（变压器、配电柜等带电设备火灾），可辅助扑救A类（木材、纸张、织物等可燃固体火灾），尤其适用于扑救E类火灾，可在不切断电源的前提下快速压制火情，有效规避触电事故扩大风险。

　　Based on the fire classification standards (Class A: solid material fire, Class B: liquid or meltable solid material fire, Class C: gas fire, Class E: live equipment fire), the applicable fire categories and specific scenarios of the three types of dry powder series fire trucks are as follows: 1. Dry powder fire trucks: the core is suitable for Class B (flammable liquid fires such as petroleum, chemical raw materials, paint, organic solvents, etc.), Class C (flammable gas fires such as natural gas, coal gas, liquefied gas, etc.), Class E (live equipment fires such as transformers, distribution cabinets, etc.), which can assist in extinguishing Class A (flammable solid fires such as wood, paper, fabrics, etc.), especially suitable for extinguishing Class E fires, and can quickly suppress the fire without cutting off the power supply, effectively avoiding electric shock. The accident increases the risk.

　　2.干粉泡沫联用消防车：在干粉消防车适用范围基础上，强化B类火灾处置能力，可高效扑救大面积B类火灾，同时能协同处置A+B、A+C等复合型火灾，弥补单一灭火剂的处置局限性。3.干粉水联用消防车：在干粉消防车适用范围基础上，强化A类火灾处置能力，可高效扑救A类（木材、织物、煤炭等可燃固体火灾），同时能协同处置A+B、A+C等复合型火灾，兼具控火与降温功能，可有效防止火情复燃。

　　2. Dry powder foam combined fire truck: on the basis of the scope of application of dry powder fire truck, strengthen the ability to deal with Class B fires, which can effectively put out a large area of Class B fires, and at the same time can cooperate to deal with A+B, A+C and other complex fires, making up for the disposal limitations of a single extinguishing agent. 3. Dry powder water combined fire truck: Based on the scope of application of dry powder fire trucks, the disposal capability of Class A fires is strengthened, which can efficiently extinguish Class A (combustible solid fires such as wood, fabric, coal, etc.), and can also coordinate the disposal of A+B, A+C and other composite fires. It has both fire control and cooling functions, which can effectively prevent the recurrence of fires.

　　三类消防车均可与对应灭火剂协同配合，进一步提升火情控制效果，最大限度降低人员伤亡和财产损失。

　　All three types of fire trucks can cooperate with corresponding fire extinguishing agents to further enhance fire control effectiveness and minimize casualties and property losses.

　　（三）结构   干粉消防车属于罐类消防车，整体结构由底盘、附加电气系统、上装车身三大核心部分构成，其中上装车身搭载的干粉灭火系统是其核心工作单元。各部分具体功能及构造规范如下：1.底盘：作为整车的承载基础，承担车身所有部件的承载任务，提供行驶动力与稳定支撑，其性能直接决定消防车的机动响应速度和作业稳定性。底盘需严格遵循GB7956.1《消防车第1部分通用技术条件》要求，能适应火场陡坡、泥泞、狭窄等复杂路况，确保车辆动力、制动、转向等核心性能达标，保障车辆快速、安全抵达火灾现场，为火情处置争取宝贵时间。2.附加电气系统：核心由警灯警报系统和信号照明系统组成，需严格符合GB7956.1《消防车第1部分通用技术条件》中关于电气系统的安全规范。警灯警报系统用于车辆行驶过程中警示过往车辆、行人及时避让，保障车辆快速通行；信号照明系统用于夜间、昏暗环境或浓烟场景下的作业照明，为操作人员提供清晰操作视野、保障作业安全，且所有照明、信号装置需严格符合标准规定的数量、位置和光色要求。

　　（3） The structural dry powder fire truck belongs to the tank type fire truck, and its overall structure consists of three core parts: the chassis, the additional electrical system, and the upper body. The dry powder fire extinguishing system installed on the upper body is its core working unit. The specific functions and construction specifications of each part are as follows: 1. Chassis: As the load-bearing foundation of the entire vehicle, it undertakes the load-bearing task of all body components, provides driving power and stable support, and its performance directly determines the maneuvering response speed and operational stability of the fire truck. The chassis must strictly comply with the requirements of GB7956.1 "General Technical Conditions for Fire Trucks Part 1", and be able to adapt to complex road conditions such as steep slopes, mud, and narrowness in fire scenes, ensuring that the core performance of the vehicle, such as power, braking, and steering, meets the standards, ensuring that the vehicle arrives at the fire scene quickly and safely, and buying valuable time for fire disposal. 2. Additional electrical system: The core consists of a warning light alarm system and a signal lighting system, which must strictly comply with the safety specifications for electrical systems in GB7956.1 "Fire Trucks Part 1 General Technical Conditions". The warning light alarm system is used to warn passing vehicles and pedestrians to avoid in a timely manner during vehicle driving, ensuring fast passage of vehicles; The signal lighting system is used for work lighting at night, in dim environments, or in thick smoke scenes, providing clear visibility for operators and ensuring work safety. All lighting and signal devices must strictly comply with the quantity, location, and color requirements specified in the standards.

　　3.上装车身：主要由上装箱体和干粉灭火系统组成，其中干粉灭火系统是灭火作业的核心单元，包含各类关键部件及系统配置，各部件各司其职、协同运行，确保灭火作业高效、顺畅开展，具体核心部件如下：

　　3. Assembly of the vehicle body: It mainly consists of an assembly box and a dry powder fire extinguishing system. The dry powder fire extinguishing system is the core unit of fire extinguishing operations, including various key components and system configurations. Each component plays its own role and operates in coordination to ensure efficient and smooth fire extinguishing operations. The specific core components are as follows:

　　-干粉罐：用于贮存干粉灭火剂的高压密闭容器，需严格遵循GB7956.4《消防车第4部分干粉消防车》标准要求，配备进气环管，顶部设有安全阀接头、放余气接头和压力表接头，可实时监测罐内压力、及时释放余气，有效防范罐内压力过高引发的安全隐患，罐体材质、耐压性能需完全符合标准规定，确保使用安全。

　　-Dry powder tank: a high-pressure sealed container used to store dry powder fire extinguishing agents, which must strictly comply with the requirements of GB7956.4 "Fire Truck Part 4 Dry Powder Fire Truck" standard. It is equipped with an intake ring pipe, a safety valve joint, a residual gas joint, and a pressure gauge joint at the top, which can monitor the pressure inside the tank in real time and release residual gas in a timely manner, effectively preventing safety hazards caused by excessive pressure inside the tank. The material and pressure resistance of the tank body must fully comply with the standard requirements to ensure safe use.

　　-氮气体瓶组（动力系统）：由若干只高压气瓶组成，常规单瓶容量为40L，集中安装于上装箱体内部，需符合GB7956.4《消防车第4部分干粉消防车》对动力系统的技术要求，是干粉灭火剂输送的核心动力源，通过释放高压氮气产生推力，推动干粉实现高速喷射。气瓶的耐压、密封性能需定期校验，确保始终符合标准要求，保障动力输出稳定可靠。

　　-Nitrogen gas cylinder group (power system): It consists of several high-pressure gas cylinders, with a conventional single cylinder capacity of 40L, centrally installed inside the upper box body, and needs to comply with the technical requirements of GB7956.4 "Fire Trucks Part 4: Dry Powder Fire Trucks" for the power system. It is the core power source for the transportation of dry powder fire extinguishing agents, which generates thrust by releasing high-pressure nitrogen gas and drives the dry powder to achieve high-speed spraying. The pressure resistance and sealing performance of gas cylinders need to be regularly verified to ensure compliance with standard requirements and ensure stable and reliable power output.

　　-输气系统：分为高压输气系统和低压输气系统，核心功能是将氮气体瓶组内的压缩氮气调节至与干粉罐适配的工作压力，平稳输送至干粉罐内，为干粉喷射提供持续、稳定的动力支撑，保障喷射过程顺畅、均匀。   需特别注意，高压输气管路在使用过程中易出现结霜现象，该现象主要因高压氮气快速释放时气体膨胀吸热，导致管路温度骤降，空气中的水汽在管路表面凝结成霜，属于正常物理现象；正常结霜多集中在管路接口附近，呈均匀薄霜状，若出现局部厚霜、结霜范围快速扩大，需警惕接口漏气，同时需做好防护及相关操作，避免影响装备使用和作业安全。

　　-Gas transmission system: It is divided into high-pressure gas transmission system and low-pressure gas transmission system. The core function is to adjust the compressed nitrogen gas in the nitrogen gas cylinder group to the working pressure suitable for the dry powder tank, smoothly deliver it to the dry powder tank, and provide continuous and stable power support for dry powder injection, ensuring smooth and uniform injection process. Special attention should be paid to the occurrence of frosting in high-pressure gas pipelines during use. This phenomenon is mainly caused by the rapid release of high-pressure nitrogen gas, which expands and absorbs heat, resulting in a sudden drop in pipeline temperature. The water vapor in the air condenses into frost on the surface of the pipeline, which is a normal physical phenomenon; Normal frosting is mostly concentrated near the pipeline interface, appearing as uniform thin frost. If there is local thick frost and the frosting area rapidly expands, it is necessary to be alert to air leakage at the interface, and to take protective measures and related operations to avoid affecting equipment use and operational safety.

　　-干粉炮：可变量喷射装备，具备两种不同发射强度，由炮管、弯头内套管、定位机构及变量阀等部件组成，可灵活调节喷射角度和强度，适配不同火势大小的处置需求，实现大范围火情覆盖，提升火情处置效率，助力快速控制火势蔓延。

　　-Dry powder cannon: a variable spraying equipment with two different firing intensities, consisting of a barrel, an elbow inner sleeve, a positioning mechanism, and a variable valve. It can flexibly adjust the spraying angle and intensity, adapt to the disposal needs of different fire sizes, achieve large-scale fire coverage, improve fire disposal efficiency, and help quickly control the spread of fire.

　　-出粉管路：常规配备1-3条，分别为炮出粉管路、左干粉出粉管路和右干粉出粉管路，一端连接干粉罐，另一端分别对接干粉炮和干粉枪，可实现多方位、多角度火情处置，提升灭火操作灵活性，满足不同场景下的灭火需求。

　　-Powder discharge pipeline: Typically equipped with 1-3 pipelines, namely the cannon powder discharge pipeline, the left dry powder discharge pipeline, and the right dry powder discharge pipeline. One end is connected to the dry powder tank, and the other end is respectively connected to the dry powder cannon and dry powder gun, which can achieve multi-directional and multi angle fire disposal, improve the flexibility of fire extinguishing operations, and meet the fire extinguishing needs in different scenarios.

　　-吹扫管路：用于灭火作业结束后，对出粉管路、干粉炮、干粉枪进行全面吹扫清理，彻底清除管路内残留干粉，防止余粉结块堵塞管路，保障装备下次正常投入使用，避免因管路堵塞影响火情处置进度。

　　-Purging pipeline: used for comprehensive blowing and cleaning of the powder discharge pipeline, dry powder cannon, and dry powder gun after the completion of fire extinguishing operations, thoroughly removing residual dry powder in the pipeline, preventing the blockage of the pipeline by residual powder clumping, ensuring the normal use of equipment next time, and avoiding the impact of pipeline blockage on the progress of fire disposal.

　　-放余气管路：用于干粉喷射停止后，缓慢释放干粉罐内剩余气体，逐步将罐内压力降至零位，避免高压气体长期留存对装备造成损坏，杜绝安全事故发生，保障装备及操作人员安全。

　　-Residual gas release pipeline: used to slowly release the remaining gas in the dry powder tank after the dry powder injection stops, gradually reducing the pressure inside the tank to zero, avoiding the long-term retention of high-pressure gas and causing damage to equipment, preventing safety accidents, and ensuring the safety of equipment and operators.

　　-干粉枪及卷盘：连接左右出粉管路，适用于近距离处置小型火情、精准扑救局部火源；卷盘可灵活拉伸、收纳，提升操作便捷性，便于操作人员快速展开处置，提高初期火情处置效率，实现“打早、打小、打了”的处置目标。

　　-Dry powder gun and reel: connected to the left and right powder discharge pipelines, suitable for handling small fires at close range and accurately extinguishing local fire sources; The reel can be flexibly stretched and stored, improving operational convenience, facilitating quick deployment and disposal by operators, improving the efficiency of initial fire disposal, and achieving the disposal goal of "hitting early, hitting small, and hitting".

　　4.出粉系统配置说明：最常见的干粉消防车通常采用“一个干粉罐对应一套出粉系统”的配置，但从专业消防车辆结构来看，实际配置会根据车型设计和灭火需求呈现不同组合方式，具体分为以下四种常见配置：

　　4. Description of Powder Dispensing System Configuration: The most common dry powder fire truck usually adopts the configuration of "one dry powder tank corresponds to one powder dispensing system". However, from the perspective of professional fire truck structure, the actual configuration will present different combinations according to the vehicle design and fire extinguishing needs, which are specifically divided into the following four common configurations:

　　1）.标准一罐一套系统（最常见）：对于大多数中小型干粉消防车，为简化管路设计、减轻车重并方便日常维护，通常配备1个干粉罐，并对应1套独立的出粉管路和喷射系统（通常包括1门干粉炮和1-2支干粉枪）。该布局结构清晰、操作便捷，能满足大部分常规B类（液体）和C类（气体）火灾的扑救需求。

　　1）. Standard one tank one set system (most commonly): For most small and medium-sized dry powder fire trucks, in order to simplify pipeline design, reduce vehicle weight, and facilitate daily maintenance, one dry powder tank is usually equipped, corresponding to one independent powder discharge pipeline and spraying system (usually including one dry powder gun and 1-2 dry powder guns). The layout structure is clear and easy to operate, which can meet the firefighting needs of most conventional Class B (liquid) and Class C (gas) fires.

　　2）.多罐共享一套系统：在一些大型干粉消防车（如重型干粉泡沫联用车或大容量纯干粉车）上，为大幅增加干粉携带量，以应对长时间、高强度火灾（如大型石化储罐火灾），通常会配备2个及以上干粉罐。受车体上装空间和操控复杂性限制，这多个罐体往往并联接入同一套输气和出粉总管，共享1套干粉炮和管路系统。实战中，操作人员可通过阀门控制，依次或同时将多个罐体内的干粉通过这套系统喷射出去。

　　2）. Multiple tanks share a set of system: some large dry powder fire trucks (such as heavy dry powder foam combined vehicles or large capacity dry powder trucks) are usually equipped with two or more dry powder tanks in order to significantly increase the carrying capacity of dry powder to cope with long-term and high intensity fires (such as large petrochemical tank fires). Due to the limitations of space and handling complexity on the vehicle body, these multiple tanks are often connected in parallel to the same set of gas and powder delivery pipelines, sharing one set of dry powder guns and pipeline systems. In actual combat, operators can use valves to control the spraying of dry powder from multiple tanks through this system, either sequentially or simultaneously.

　　3）.一罐对应多套系统（较少见但存在）：在某些特殊定制的高端消防车上，为实现更大面积火力覆盖或同时开展不同方向灭火作业，也可将1个大型干粉罐通过复杂分流管路，连接并对应2套及以上独立出粉系统（例如2门干粉炮或4支干粉枪）。不过该配置对罐体内气压稳定性和管路流体力学设计要求极高。

　　3）. One tank corresponds to multiple systems (rare but existing): In some specially customized high-end fire trucks, in order to achieve larger fire coverage or simultaneously carry out fire extinguishing operations in different directions, one large dry powder tank can also be connected and correspond to two or more independent powder dispensing systems (such as two dry powder cannons or four dry powder guns) through complex diversion pipelines. However, this configuration requires extremely high pressure stability inside the tank and fluid dynamics design of the pipeline.

　　4）.多罐配备多套独立出粉系统（多对多）：该配置属于高端定制化配置，主要应用于超大吨位特种消防车或极端复杂火灾处置场景（如大型石化基地、机场特勤等）。其核心特点是配备多个干粉罐（通常为2个及以上），且每个干粉罐均对应一套独立的出粉管路、喷射系统及动力辅助系统，相当于多辆标准干粉消防车的上装系统集成在同一底盘上。该配置的优势是多套系统可完全独立运行、互为备份，能实现多方向、高强度同步喷射，大幅提升复杂火情处置效率和可靠性，可应对长时间、大范围极端火灾场景，但对底盘承重、管路设计及操作协同要求极高，日常维护难度和成本也相对较高。

　　4）. Multiple tanks equipped with multiple independent powder extraction systems (many to many): This configuration is a high-end customized configuration, mainly used for ultra large tonnage special fire trucks or extremely complex fire disposal scenarios (such as large petrochemical bases, airport special operations, etc.). Its core feature is equipped with multiple dry powder tanks (usually 2 or more), and each dry powder tank corresponds to an independent powder discharge pipeline, spray system, and power assist system, which is equivalent to the upper system of multiple standard dry powder fire trucks integrated on the same chassis. The advantage of this configuration is that multiple systems can operate completely independently and serve as backups for each other, enabling multi-directional and high-intensity synchronous spraying, greatly improving the efficiency and reliability of complex fire response, and can cope with long-term and large-scale extreme fire scenarios. However, it requires extremely high requirements for chassis load-bearing, pipeline design, and operational coordination, and daily maintenance difficulty and cost are relatively high.

　　总结来说：“一罐对一套系统”是干粉消防车最经典、最普遍的结构单元。面对更复杂的工业或机场消防救援任务时，工程师会通过增减罐体数量或并联/分流管路，演变出“多罐一套”“一罐多套”及“多罐多套”的灵活配置。无论哪种配置，其核心目的都是在最短时间内输出最大干粉流量，实现最快灭火抑爆效果。

　　In summary, the "one tank to one system" is the most classic and common structural unit of dry powder fire trucks. When facing more complex industrial or airport firefighting and rescue tasks, engineers will evolve flexible configurations such as "one set of multiple tanks", "one set of multiple tanks", and "multiple sets of multiple tanks" by increasing or decreasing the number of tanks or parallel/split pipelines. Regardless of the configuration, the core goal is to output the maximum dry powder flow rate in the shortest possible time, achieving the fastest fire extinguishing and explosion suppression effect.

　　氮气瓶组及输气系统配置说明：作为干粉消防车的“心脏”，氮气瓶组及输气系统的配置方式与出粉系统类似，主要分为“一对一”和“多对一/一对多/多对多”几种模式，具体配置逻辑结合车型需求设计，详细如下：

　　Description of nitrogen cylinder group and gas transmission system configuration: As the "heart" of the dry powder fire truck, the configuration of the nitrogen cylinder group and gas transmission system is similar to that of the powder discharge system, mainly divided into "one-to-one" and "many to one/one to many/many to many" modes. The specific configuration logic is designed according to the requirements of the vehicle type, as follows:

　　1）.标准配置：一个干粉罐对应一套氮气瓶组及输气系统。这是市面上最常见、最普遍的配置形式（尤其适用于装载量3吨以下的单车）。结构特点为：一辆车配备1个干粉罐，搭配1套独立的氮气瓶组（通常由4~9只高压气瓶组成）和1套输气管路（包含独立的减压阀、高压管和低压进气管等）。其核心优势是系统完全独立，管路设计简单清晰，液压/气压控制逻辑简洁，日常维护和故障排查极为方便，适配中小型消防车常规作业需求。

　　1）. Standard configuration: One dry powder tank corresponds to one set of nitrogen cylinder group and gas transmission system. This is the most common and widespread configuration form on the market (especially suitable for bicycles with a loading capacity of less than 3 tons). The structural characteristics are: one vehicle is equipped with one dry powder tank, paired with one independent nitrogen cylinder group (usually composed of 4-9 high-pressure gas cylinders) and one set of gas transmission pipelines (including independent pressure reducing valves, high-pressure pipes, and low-pressure intake pipes, etc.). Its core advantage is that the system is completely independent, the pipeline design is simple and clear, the hydraulic/pneumatic control logic is concise, daily maintenance and troubleshooting are extremely convenient, and it is suitable for the routine operation needs of small and medium-sized fire trucks.

　　2）.大型车辆配置一：多罐共享一套大型氮气瓶组（一对多）。在某些重型干粉消防车（如搭载2个3吨干粉罐的大型联用消防车）上，为严格控制整车总重并节约底盘上装空间，厂家往往采用“两套干粉罐+一套超大型氮气瓶组”的设计。结构特点为：将氮气瓶组数量大幅增加（如并联18只大容量氮气瓶），再通过一套大流量输气主管路，分流分别向两个干粉罐供气。相比两套独立氮气系统，该设计减少了瓶组框架、减压阀和高压管路的使用量，大幅减轻死重，同时降低制造成本，适配大型车辆大容量灭火需求。

　　2）. Large vehicle configuration one: Multiple tanks share a set of large nitrogen cylinder sets (one to many). On some heavy-duty dry powder fire trucks (such as large combined fire trucks equipped with two 3-ton dry powder tanks), in order to strictly control the total weight of the vehicle and save space on the chassis, manufacturers often adopt a design of "two sets of dry powder tanks+one set of ultra large nitrogen cylinder sets". The structural feature is to significantly increase the number of nitrogen cylinder groups (such as parallel connection of 18 high-capacity nitrogen cylinders), and then supply gas to two dry powder tanks separately through a set of high flow gas transmission main pipelines. Compared to two independent nitrogen systems, this design reduces the use of bottle group frames, pressure reducing valves, and high-pressure pipelines, significantly reducing dead weight and manufacturing costs, and is suitable for the large capacity fire extinguishing needs of large vehicles.

　　3）.大型车辆配置二：多罐配备多套独立氮气系统（多对多）。该配置与出粉系统“多罐多套”配置相匹配，主要应用于超大吨位特种消防车，通常配备2个及以上干粉罐，每个干粉罐均搭配一套完整的氮气瓶组及输气系统，与出粉系统“多罐多套”配置完全匹配，实现“一罐一动力一出粉”的独立运行模式。其结构特点相当于把两辆及以上标准干粉车的上装并联在一个大底盘上，例如某款车型就配置了2个干粉罐和18只氮气瓶（分为两组），配备2个减压阀和2套操作系统面板。其核心优势是拥有极致的气量和喷射流量，两套系统可完全独立运行、互为备份，可靠性极高，适合应对极其严苛的石化基地或机场特勤火灾等复杂场景，与出粉系统“多罐多套”配置协同，实现多方向、高强度同步灭火。

　　3）. Large vehicle configuration 2: Multiple tanks equipped with multiple independent nitrogen systems (many to many). This configuration is matched with the "multi tank, multi set" configuration of the powder dispensing system and is mainly used for ultra large tonnage special fire trucks. Usually equipped with 2 or more dry powder tanks, each dry powder tank is equipped with a complete set of nitrogen cylinders and gas transmission system, which is fully matched with the "multi tank, multi set" configuration of the powder dispensing system, achieving an independent operation mode of "one tank, one power, one powder dispensing". Its structural characteristics are equivalent to connecting the upper parts of two or more standard dry powder trucks in parallel on a large chassis. For example, a certain model is equipped with 2 dry powder tanks and 18 nitrogen cylinders (divided into two groups), equipped with 2 pressure reducing valves and 2 sets of operating system panels. Its core advantage is having the ultimate gas volume and jet flow rate. The two systems can operate completely independently and serve as backups for each other, with extremely high reliability. It is suitable for dealing with complex scenarios such as extremely harsh petrochemical bases or airport special operations fires. In conjunction with the powder dispensing system's "multiple tanks and multiple sets" configuration, it achieves multi-directional and high-intensity synchronous fire extinguishing.

　　总结与类比：若将干粉罐比作“弹药箱”，则氮气瓶组就是“高压打气筒”，输气系统就是“导气管”。常规轻型/中型车：通常为1个弹药箱配1个打气筒（1:1配置）；重型/特种车：为提升效率或增加容量，可设计为2个弹药箱共享1个超级打气筒（2:1配置）、1个弹药箱配多个打气筒（1:多配置），或2个弹药箱配2个打气筒（2:2配置，即多对多配置）。具体采用哪种形式，消防车制造商会根据客户所需干粉总量、底盘承重极限及项目预算，进行最优化结构设计。

　　Summary and analogy: If the dry powder tank is compared to an "ammunition box", then the nitrogen cylinder group is the "high-pressure pump", and the gas delivery system is the "air duct". Conventional light/medium vehicles: typically 1 ammunition box with 1 pump (1:1 configuration); Heavy/special vehicles: To improve efficiency or increase capacity, they can be designed with 2 ammunition boxes sharing 1 super pump (2:1 configuration), 1 ammunition box with multiple pumps (1: multi configuration), or 2 ammunition boxes with 2 pumps (2:2 configuration, i.e. many to many configuration). The specific form to be adopted will be optimized by the fire truck manufacturer based on the total amount of dry powder required by the customer, the load-bearing limit of the chassis, and the project budget.

　　干粉消防车内部结构示意图1.底盘2.干粉罐3.高压气瓶组4.上装箱体5.输气管道6.干粉卷盘7.干粉炮8.警灯警报系统

　　Internal structure diagram of dry powder fire truck 1. Chassis 2. Dry powder tank 3. High pressure gas cylinder group 4. Upper box body 5. Gas pipeline 6. Dry powder reel 7. Dry powder cannon 8. Alarm light system

　　干粉消防车组成结构示意图（四）工作原理   干粉消防车的灭火核心原理，是利用高压氮气作为驱动介质，将干粉灭火剂通过管路高速喷出；依靠化学抑制作用中断燃烧的链式反应，并辅以物理窒息与热辐射阻隔，从而实现高效灭火。掌握装备结构是理解工作原理、规范开展实操的基础，具体操作步骤规范如下：

　　Schematic diagram of the composition structure of a dry powder fire truck (IV) Working principle: The core principle of fire extinguishing for a dry powder fire truck is to use high-pressure nitrogen as the driving medium to spray dry powder fire extinguishing agent at high speed through pipelines; By relying on chemical inhibition to interrupt the chain reaction of combustion, supplemented by physical suffocation and thermal radiation barrier, efficient fire extinguishing can be achieved. Mastering equipment structure is the foundation for understanding working principles and carrying out practical operations in a standardized manner. The specific operational steps are as follows:

　　1.战前准备：消防车辆抵达火灾现场后，立即停靠在火源上风向安全区域（根据火势大小，安全距离控制在5-10米，火势较大时可适当扩大至10-15米），拉紧手刹、关闭车辆发动机、开启驻车制动，确保车辆稳定停靠，防止作业过程中滑动。同时，操作人员需穿戴齐全个人防护装备（头盔、防火服、防护手套、防滑靴），确认现场无易燃易爆物品残留、无人员被困后，启动装备准备开展作业，全程操作控制在5分钟内，为火情处置争取时间。

　　1. Pre war preparation: After the fire truck arrives at the scene of the fire, it should immediately park in a safe area upwind of the fire source (depending on the size of the fire, the safe distance should be controlled at 5-10 meters, and can be appropriately expanded to 10-15 meters when the fire is large), tighten the handbrake, turn off the vehicle engine, and turn on the parking brake to ensure stable parking and prevent sliding during operation. At the same time, operators need to wear complete personal protective equipment (helmets, fire-resistant clothing, protective gloves, anti slip boots), confirm that there are no flammable or explosive materials left on site, and that no personnel are trapped, then start the equipment to prepare for the operation. The entire operation should be controlled within 5 minutes to buy time for fire disposal.

　　2.系统检查：作业前需再次全面排查装备状态，逐一确认各项指标达标，常规检查时长不超过3分钟：干粉罐压力表数值在标准范围（0.8-1.4MPa，常规工况下推荐保持在1.0MPa左右）；氮气体瓶压力符合作业要求（不低于12MPa，常规工况下推荐保持在15MPa左右）；出粉管路、吹扫管路、放余气管路无破损、无松动，接口密封严实；干粉炮、干粉枪外观完好，定位机构灵活，变量阀切换顺畅；附加电气系统运行正常，警灯、警报、作业照明工作正常，避免夜间或昏暗环境影响操作安全。

　　2. System inspection: Before starting the operation, it is necessary to thoroughly check the equipment status and confirm that each indicator meets the standard. The routine inspection should not exceed 3 minutes. The pressure gauge value of the dry powder tank should be within the standard range (0.8-1.4MPa, and it is recommended to maintain it at around 1.0MPa under normal working conditions); The pressure of the nitrogen gas cylinder meets the operational requirements (not less than 12MPa, and it is recommended to maintain around 15MPa under normal operating conditions); The powder discharge pipeline, blowing pipeline, and residual gas discharge pipeline are not damaged or loose, and the interface is tightly sealed; The appearance of the dry powder cannon and dry powder gun is intact, the positioning mechanism is flexible, and the variable valve switches smoothly; The additional electrical system is operating normally, and the warning lights, alarms, and work lighting are working properly to avoid nighttime or dim environments that may affect operational safety.

　　3.系统启动：系统启动前确认各干粉出口阀均处于关闭状态；操作人员缓慢打开氮气体瓶组阀门，通过输气系统压力阀，将氮气压力调节至与干粉罐适配的工作压力（根据火情大小，常规调节至0.6-0.8MPa，火势较小时推荐0.6MPa，火势较大时推荐0.8MPa），观察压力表指针稳定后，确认氮气输送正常、无漏气现象，方可进入下一步火情处置操作；严禁违规操作引发安全隐患，全程操作需平稳缓慢，避免压力骤升。

　　3. System startup: Before starting the system, confirm that all dry powder outlet valves are closed; The operator slowly opens the valve of the nitrogen gas cylinder group and adjusts the nitrogen pressure to the working pressure suitable for the dry powder tank through the pressure valve of the gas transmission system (usually adjusted to 0.6-0.8MPa according to the size of the fire, 0.6MPa is recommended for small fires, and 0.8MPa is recommended for large fires). After observing the stability of the pressure gauge pointer, it is confirmed that the nitrogen transmission is normal and there is no leakage before entering the next step of fire disposal operation; It is strictly prohibited to engage in illegal operations that may cause safety hazards. The entire process should be smooth and slow to avoid sudden pressure increases.

　　4.火情处置：根据火情类型、火势大小，合理选择喷射装备开展处置：火势较大时，启用干粉炮，调整炮管角度（以水平或倾斜为宜，避免垂直喷射），切换变量阀至对应发射强度，打开干粉炮球阀，瞄准火源根部匀速喷射干粉，喷射速度控制在0.8-1.2m/s，避免速度过快导致干粉飞溅、影响覆盖效果，确保灭火剂全面覆盖火源，快速压制火势；近距离处置小型火情或精准扑救局部火源时，展开干粉枪卷盘，连接好干粉枪，操作人员握住枪身保持稳定，瞄准火源根部扣动扳机喷射，喷射过程中可小幅移动枪身，扩大灭火剂覆盖范围，确保彻底扑灭火源、严防复燃。

　　4. Fire disposal: According to the type and size of the fire, choose appropriate spraying equipment for disposal: when the fire is large, use the dry powder cannon, adjust the angle of the cannon barrel (preferably horizontal or inclined, avoid vertical spraying), switch the variable valve to the corresponding firing intensity, open the ball valve of the dry powder cannon, aim at the root of the fire source, spray dry powder at a constant speed, control the spraying speed at 0.8-1.2m/s, avoid the speed being too fast, which may cause dry powder splashing and affect the coverage effect, ensure that the fire extinguishing agent fully covers the fire source, and quickly suppress the fire; When dealing with small fires at close range or accurately extinguishing local sources of fire, unfold the dry powder gun reel, connect the dry powder gun, and the operator holds the gun body to maintain stability. Aim at the root of the fire source and pull the trigger to spray. During the spraying process, the gun body can be moved slightly to expand the coverage of the fire extinguishing agent, ensuring complete extinguishing of the fire source and preventing re ignition.

　　5.作业收尾：火情彻底扑灭后，先关闭氮气体瓶组阀门、停止氮气输送，随后启动吹扫管路控制按钮，对出粉管路、干粉炮、干粉枪进行全面吹扫，持续3-5分钟（管路较长时可延长至5-8分钟），确保管路内无余粉残留；吹扫完成后，缓慢打开放余气管路阀门，释放干粉罐内剩余气体，待压力表指针回归零位后，关闭放余气阀门；最后，整理好干粉枪、卷盘及各类管路，清理车身及作业现场残留干粉，全面检查装备无异常后，关闭所有电气系统，准备撤离现场。简易操作流程中概括如下：

　　5. Homework completion: After the fire is completely extinguished, first close the valve of the nitrogen gas cylinder group, stop nitrogen gas delivery, and then activate the control button of the blowing pipeline to comprehensively blow the powder outlet pipeline, dry powder gun, and dry powder gun for 3-5 minutes (which can be extended to 5-8 minutes if the pipeline is long), ensuring that there is no residual powder in the pipeline; After the purging is completed, slowly open the valve of the residual gas pipeline to release the remaining gas in the dry powder tank. After the pressure gauge pointer returns to zero, close the residual gas valve; Finally, organize the dry powder gun, reel, and various pipelines, clean up the residual dry powder on the vehicle body and work site, thoroughly inspect the equipment for any abnormalities, turn off all electrical systems, and prepare to evacuate the site. The simplified operation process can be summarized as follows:

　　1.待命：瓶头阀关闭，高低压截止阀关闭，罐内常压。

　　1. Standby: The bottle head valve is closed, the high and low pressure shut-off valves are closed, and the tank is at normal pressure.

　　2.准备/充气： 打开氮气瓶头阀-开高压截止阀-减压阀自动输出1.4MPa；开进气总阀-氮气从罐底环管进入，搅动干粉呈沸腾状；罐压升至1.4MPa减压阀自动稳压，停止进气。

　　2. Preparation/inflation: Open the nitrogen cylinder head valve - open the high-pressure cut-off valve - the pressure reducing valve will automatically output 1.4MPa; Open the intake valve - nitrogen enters from the bottom ring pipe of the tank, stirring the dry powder to form a boiling state; When the tank pressure rises to 1.4MPa, the pressure reducing valve automatically stabilizes and stops air intake.

　　3.喷射：打开炮/枪控制开关-气动执行器打开出粉球阀，罐内1.4MPa氮气携带干粉喷出;罐压下降-减压阀自动补压，持续喷射。

　　3. Spray: Open the cannon/gun control switch - the pneumatic actuator opens the powder discharge ball valve, and 1.4MPa nitrogen gas carrying dry powder is sprayed out from the tank; Tank pressure drops - the pressure reducing valve automatically replenishes pressure and continues to spray.

　　4.停止+吹扫:关出粉阀-关进气球阀,开吹扫球阀-余氮反吹管路，防止干粉结块堵塞。

　　4. Stop+Blow: Close the powder outlet valve - close the inlet balloon valve, open the blow ball valve - residual nitrogen blowback pipeline to prevent dry powder agglomeration and blockage.

　　5.复位:放余气-关闭所有阀门-恢复待命。

　　5. Reset: Release residual gas - close all valves - restore standby.

　　（五）使用注意事项

　　（5） Precautions for use

　　1.作业前必须全面检查整车及各系统状态，严格遵循GB7956.4《消防车第4部分干粉消防车》及GB7956.1《消防车第1部分通用技术条件》要求，重点确认干粉罐压力、氮气体瓶压力符合标准，出粉管路、吹扫管路无破损、无堵塞，附加电气系统工作正常；坚决杜绝带故障作业，确保装备各项性能达标，保障作业安全。

　　1. Before starting the task, a comprehensive inspection of the entire vehicle and all systems must be conducted, strictly following the requirements of GB7956.4 "Fire Trucks Part 4: Dry Powder Fire Trucks" and GB7956.1 "Fire Trucks Part 1: General Technical Conditions". The focus should be on confirming that the pressure of the dry powder tank and nitrogen gas cylinder meet the standards, and that the powder outlet and purging pipelines are not damaged or blocked. The additional electrical system should also be functioning properly; Resolutely eliminate operations with malfunctions, ensure that all equipment performance meets standards, and guarantee operational safety.

　　2.扑救带电设备火灾时，需先确认设备电压等级，操作人员及喷射装备需与带电体保持安全距离（电压10kV及以下时，安全距离不小于0.7米；电压35kV及以上时，安全距离不小于1米）；严禁干粉枪、干粉炮直接接触带电体，严禁在未确认安全距离的情况下喷射，严禁用湿手操作干粉枪，防止触电事故发生；扑救易燃液体火灾时，操作人员必须站在上风向位置，避免灭火剂被风吹向自身，切实保障人身安全。

　　When extinguishing fires caused by live equipment, it is necessary to first confirm the voltage level of the equipment. Operators and spraying equipment should maintain a safe distance from the live body (when the voltage is 10kV or below, the safe distance should not be less than 0.7 meters); When the voltage is 35kV or above, the safe distance should not be less than 1 meter; It is strictly prohibited for dry powder guns and dry powder cannons to come into direct contact with charged objects. It is strictly prohibited to spray without confirming a safe distance. It is also strictly prohibited to operate dry powder guns with wet hands to prevent electric shock accidents; When extinguishing flammable liquid fires, operators must stand in an upwind position to avoid the fire extinguishing agent being blown towards themselves by the wind, effectively ensuring personal safety.

　　3.喷射干粉过程中，需根据火势大小灵活调节干粉炮发射强度，避免过度喷射造成灭火剂浪费；灭火作业结束后，必须启动吹扫管路，彻底清除管路内余粉，防止余粉结块堵塞管路，影响装备下次正常使用。

　　During the process of spraying dry powder, it is necessary to flexibly adjust the firing intensity of the dry powder cannon according to the size of the fire to avoid excessive spraying and waste of extinguishing agent; After the fire extinguishing operation is completed, it is necessary to start blowing the pipeline to thoroughly remove the residual powder in the pipeline, prevent the residual powder from clumping and blocking the pipeline, and affect the normal use of the equipment next time.

　　4.作业过程中若发现干粉罐压力表数值异常升高，需立即停止作业，关闭氮气体瓶组阀门，通过放余气管路缓慢释放罐内余气，待压力回归正常后，全面排查漏气、管路堵塞等故障，故障彻底排除后方可继续作业；严禁带故障强行作业。

　　4. If the pressure gauge value of the dry powder tank is found to be abnormally high during the operation, the operation should be stopped immediately, the nitrogen gas cylinder group valve should be closed, and the residual gas in the tank should be slowly released through the residual gas pipeline. After the pressure returns to normal, the faults such as gas leakage and pipeline blockage should be comprehensively investigated. Only after the faults are completely eliminated can the operation continue; It is strictly prohibited to carry out forced operations with faults.

　　5.需定期检查干粉灭火剂状态，若发现干粉出现结块、变质、过期等情况，需及时更换，确保灭火效果，避免因灭火剂失效导致火情处置延误、造成损失扩大。

　　5. It is necessary to regularly check the status of the dry powder fire extinguishing agent. If clumping, deterioration, expiration, etc. are found in the dry powder, it should be replaced in a timely manner to ensure the fire extinguishing effect and avoid delays in fire disposal and expansion of losses caused by the failure of the fire extinguishing agent.

　　6.高压输气管路结霜相关注意事项：①作业时若发现高压输气管路结霜，属于正常物理现象，无需停止作业，但需避免用手直接触摸结霜管路，防止冻伤；②结霜严重时，需检查管路接口密封情况，若伴随漏气，会导致结霜加剧，需立即停止作业，排查并更换密封件，拧紧接口螺栓；③作业结束后，待管路温度恢复至常温、结霜完全融化后，再对管路进行清洁和检查，避免残留水分导致管路腐蚀；④长期使用后，需定期检查高压输气管路保温层（若有），若保温层破损，需及时修补或更换，减少结霜现象，保护管路性能；⑤冬季或低温环境下，结霜现象会更明显，作业前可提前检查管路状态，作业后及时排空管路内残留气体，防止管路因低温结冰损坏。

　　6. Precautions for frosting on high-pressure gas pipelines: ① If frosting is found on the high-pressure gas pipeline during homework, it is a normal physical phenomenon and does not require stopping the work. However, it is necessary to avoid touching the frosting pipeline directly with hands to prevent frostbite; ② When frost is severe, it is necessary to check the sealing condition of the pipeline interface. If there is air leakage, it will cause the frost to intensify. The operation should be stopped immediately, the sealing components should be checked and replaced, and the interface bolts should be tightened; ③ After the homework is completed, wait for the pipeline temperature to return to room temperature and the frost to completely melt before cleaning and inspecting the pipeline to avoid residual moisture causing corrosion; ④ After long-term use, it is necessary to regularly check the insulation layer of the high-pressure gas transmission pipeline (if any). If the insulation layer is damaged, it should be repaired or replaced in a timely manner to reduce frosting and protect the performance of the pipeline; ⑤ Frost formation is more pronounced in winter or low temperature environments. Before starting work, it is recommended to check the condition of the pipeline in advance, and promptly exhaust any residual gas in the pipeline after work to prevent damage due to low-temperature icing.

　　（六）维护保养  

　　（6） Maintenance and upkeep   

　　装备维护保养是保障干粉消防车时刻处于良好战备状态、延长装备使用寿命、防范作业故障的关键环节，需严格遵循以下规范，确保装备随时可投入实战：1.日常维护：每日作业结束后，需检查车身外观、底盘部件有无破损、松动，及时清理上装箱体杂物；检查氮气体瓶压力，确保符合标准要求；排查各管路接口密封情况，严防漏气、漏粉，重点检查高压输气管路，若作业中出现结霜加剧现象，需重点排查接口密封是否完好；清洁干粉炮、干粉枪，清除表面及管路内残留余粉，确保装备外观整洁、功能完好，随时处于战备状态。2.定期保养：每月对附加电气系统进行全面检测，更换损坏的灯泡、线路，确保警灯、警报、照明系统正常工作，符合GB7956.1《消防车第1部分通用技术条件》中电气系统相关规定；每季度检查干粉罐密封性，开展压力测试，测试压力需符合GB7956.4标准规定的试验压力（通常为工作压力的1.2倍），排查泄漏隐患（由专业维修人员负责），严格遵循GB7956.4《消防车第4部分干粉消防车》中罐体密封及压力测试相关规范，同时检查高压输气管路有无破损、腐蚀，重点查看结霜频繁区域的管路状况，及时处理管路破损、保温层损坏等问题；每半年对氮气体瓶组进行专业校验（由专业维修人员负责），更换过期、不合格气瓶，符合高压容器相关标准及GB7956.4《消防车第4部分干粉消防车》中动力系统相关要求；每年对整个干粉灭火系统进行全面拆解检查（由专业维修人员负责，保养时长不超过4小时），更换老化、破损部件，确保系统整体性能稳定，符合系列国家标准规定。3.存放保养：消防车辆需停放在干燥、通风、阴凉的库房内，避免阳光暴晒、雨淋、潮湿环境侵蚀；长期停放时，需释放干粉罐内剩余气体，排空管路余粉，定期启动车辆，检查底盘、发动机运行状态，防止部件老化、锈蚀，确保装备随时可投入实战使用。

　　Equipment maintenance is a key link in ensuring that dry powder fire trucks are always in good combat readiness, extending equipment service life, and preventing operational failures. It is necessary to strictly follow the following specifications to ensure that the equipment can be put into practical use at any time: 1 Daily maintenance: After completing daily tasks, it is necessary to check the appearance of the vehicle body and chassis components for any damage or looseness, and promptly clean up any debris in the upper box; Check the pressure of the nitrogen gas cylinder to ensure compliance with standard requirements; Check the sealing condition of each pipeline interface, strictly prevent air leakage and powder leakage, and focus on inspecting the high-pressure gas transmission pipeline. If frosting intensifies during operation, it is necessary to focus on checking whether the interface sealing is intact; Clean the dry powder cannon and dry powder gun, remove residual powder on the surface and in the pipeline, ensure the appearance of the equipment is clean, the function is intact, and it is always in a state of readiness. 2. Regular maintenance: Conduct a comprehensive inspection of the additional electrical system every month, replace damaged bulbs and circuits, ensure the normal operation of the alarm lights, alarms, and lighting systems, and comply with the relevant electrical system regulations in GB7956.1 "General Technical Conditions for Fire Trucks Part 1"; Check the sealing of the dry powder tank every quarter, conduct pressure tests, and ensure that the test pressure meets the test pressure specified in GB7956.4 standard (usually 1.2 times the working pressure). Identify potential leakage hazards (handled by professional maintenance personnel), strictly follow the relevant specifications for tank sealing and pressure testing in GB7956.4 "Fire Trucks Part 4: Dry Powder Fire Trucks", and inspect the high-pressure gas transmission pipeline for damage and corrosion. Focus on checking the condition of pipelines in areas with frequent frosting, and promptly address issues such as pipeline damage and insulation layer damage; Every six months, the nitrogen gas cylinder group shall be professionally calibrated (by professional maintenance personnel), and expired or unqualified gas cylinders shall be replaced to meet the relevant standards of high-pressure vessels and the requirements of the power system in GB7956.4 "Fire Trucks Part 4: Dry Powder Fire Trucks"; Every year, a comprehensive dismantling and inspection of the entire dry powder fire extinguishing system is carried out (by professional maintenance personnel, with a maintenance duration of no more than 4 hours), replacing aging and damaged components to ensure the overall stability of the system performance and compliance with a series of national standards. 3. Storage and maintenance: Fire trucks should be parked in a dry, ventilated, and cool warehouse to avoid exposure to sunlight, rain, and humid environments; When parked for a long time, it is necessary to release the remaining gas in the dry powder tank, empty the remaining powder in the pipeline, start the vehicle regularly, check the operation status of the chassis and engine, prevent component aging and corrosion, and ensure that the equipment can be put into practical use at any time.

　　（七）常见故障及排除方法   实战作业中，需熟练掌握常见故障排查及排除方法，明确故障判断依据，快速解决装备故障，保障火情处置顺利开展，具体如下：

　　（7） Common faults and troubleshooting methods    In practical operations, it is necessary to proficiently master common troubleshooting and elimination methods, clarify the basis for fault diagnosis, quickly solve equipment failures, and ensure smooth fire disposal. The specific steps are as follows:

　　1.干粉喷射无力：判断依据为干粉喷射射程明显缩短、呈散落状，无法有效覆盖火源，部分情况下伴随高压输气管路结霜加剧。故障原因主要为氮气体瓶压力不足、输气管路堵塞或接口漏气，其中高压输气管路漏气会导致结霜加剧，同时伴随喷射无力，需重点排查；若排查无漏气、无堵塞，需检查减压阀是否失灵，及时维修或更换。排除方法：及时检查氮气体瓶压力，不足时补充充气；拆解输气管路，清理内部堵塞物；检查管路接口密封件，更换破损部件，拧紧接口螺栓，确保密封严实，若结霜严重需先待管路升温后再进行检修；检查减压阀，若出现失灵及时维修或更换。

　　1. Weak dry powder spraying: The judgment basis is that the dry powder spraying range is significantly shortened and scattered, which cannot effectively cover the fire source. In some cases, it is accompanied by increased frosting in the high-pressure gas pipeline. The main causes of the malfunction are insufficient pressure in the nitrogen gas cylinder, blockage in the gas transmission pipeline, or air leakage at the interface. Among them, air leakage in the high-pressure gas transmission pipeline can lead to increased frosting, accompanied by weak spraying, which needs to be carefully investigated; If there is no air leakage or blockage during the inspection, it is necessary to check whether the pressure reducing valve is malfunctioning and repair or replace it in a timely manner. Exclusion method: Check the pressure of the nitrogen gas cylinder in a timely manner and inflate it if it is insufficient; Disassemble the gas pipeline and clean up internal blockages; Check the sealing components of the pipeline interface, replace damaged parts, tighten the interface bolts to ensure a tight seal. If frost is severe, wait for the pipeline to heat up before conducting maintenance; Check the pressure reducing valve and repair or replace it promptly if it malfunctions.

　　2.管路漏粉：判断依据为管路接口处有干粉溢出，喷射时干粉损耗严重，无法达到预期喷射效果。故障原因多为管路接口密封件老化、破损，或接口螺栓松动。排除方法：及时更换老化、破损的密封件，重新拧紧接口螺栓，确保接口密封严实；全面排查管路有无破损，若有破损及时修补或更换，避免漏粉影响灭火作业。

　　2. Pipeline powder leakage: The judgment basis is that there is dry powder overflow at the pipeline interface, and the dry powder loss is severe during spraying, which cannot achieve the expected spraying effect. The main causes of malfunctions are aging or damage to pipeline interface seals, or loose interface bolts. Exclusion method: Replace aging or damaged seals in a timely manner, tighten the interface bolts again, and ensure that the interface is tightly sealed; Conduct a comprehensive inspection of the pipeline for any damage, and promptly repair or replace any damages to prevent powder leakage from affecting firefighting operations.

　　3.干粉炮无法调节角度：判断依据为转动干粉炮炮管时卡顿明显，无法灵活调整至目标角度，或变量阀切换时无明显反应。故障原因主要为定位机构卡顿、变量阀损坏，或部件缺少润滑油。排除方法：清理定位机构内杂物，添加适量润滑油，确保机构灵活运转；检查变量阀，若存在损坏及时更换，确保切换顺畅，满足不同火情处置需求。

　　3. The angle of the dry powder cannon cannot be adjusted: The judgment basis is that there is obvious jamming when rotating the dry powder cannon barrel, and it cannot be flexibly adjusted to the target angle, or there is no obvious response when switching the variable valve. The main causes of the malfunction are jamming of the positioning mechanism, damage to the variable valve, or lack of lubricating oil in the components. Exclusion method: Clean the debris inside the positioning mechanism, add an appropriate amount of lubricating oil, and ensure the flexible operation of the mechanism; Check the variable valve and replace it promptly if there is any damage to ensure smooth switching and meet different fire disposal needs.

　　4.吹扫管路无法正常工作：判断依据为启动吹扫功能后，无气体排出，或管路内余粉无法有效清除，下次使用时出现管路堵塞。故障原因多为管路堵塞、控制阀门失灵。排除方法：拆解吹扫管路，清理内部堵塞物；检修控制阀门，若出现失灵情况及时维修或更换，确保吹扫功能正常，保障管路清洁无余粉。

　　4. The blowing pipeline cannot work normally: The judgment basis is that after starting the blowing function, no gas is discharged, or the residual powder in the pipeline cannot be effectively removed, resulting in pipeline blockage during the next use. The main causes of malfunctions are pipeline blockages and malfunctioning control valves. Exclusion method: Disassemble the blowing pipeline and clean the internal blockage; Inspect the control valve and promptly repair or replace it in case of malfunction to ensure the normal blowing function and ensure that the pipeline is clean and free of residual powder.

　　二、干粉泡沫联用消防车

　　2、 Dry powder foam combined fire truck

　　  干粉泡沫联用消防车是在纯干粉消防车基础上升级而来的组合式装备，本质是干粉消防车与泡沫消防车的融合，核心优势是可根据火情类型灵活切换干粉、泡沫两种灭火剂，适配复合型火灾（如易燃液体+固体火灾）的处置需求，大幅提升火情处置的灵活性和有效性，弥补单一灭火剂的处置局限性。该车型在干粉消防车基础上，新增泡沫罐、泡沫比例混合器等泡沫灭火系统核心部件，需同时遵循GB7956.3《消防车第3部分泡沫消防车》、GB7956.4《消防车第4部分干粉消防车》及GB7956.1通用标准；其使用、维护与保养需严格遵循干粉消防车和泡沫消防车的相关操作规范，重点关注两种系统的协调配合，具体实操补充如下：1.切换操作：作业时需根据火情类型精准切换灭火剂模式，严格遵循GB7956.3、GB7956.4及GB7956.1标准要求——扑救易燃气体、带电设备火灾时，切换至干粉模式，操作流程与纯干粉消防车完全一致；扑救大面积易燃液体火灾时，切换至泡沫模式，先检查泡沫罐内泡沫液储量充足、泡沫比例混合器工作正常，开启泡沫泵，将混合比例调节至标准范围（一般为3%-6%），通过泡沫炮或泡沫枪喷射泡沫，确保泡沫均匀覆盖液面，隔绝氧气、压制火情，泡沫系统各项性能需符合GB7956.3标准；处置复合型火灾时，可先使用干粉快速控制明火，再切换至泡沫模式巩固灭火效果，有效防止火情复燃。切换模式后，需先进行10-15秒试喷，确认灭火剂喷射正常后，再开展正式灭火作业，避免管路堵塞或模式切换异常影响处置效率。2.协调注意：切换灭火剂模式时，需先关闭当前模式的动力系统（干粉模式关闭氮气体瓶组，泡沫模式关闭泡沫泵），等待管路内残留灭火剂完全排空后，再启动另一种模式，避免干粉与泡沫混合结块，堵塞管路或影响灭火效果；作业过程中，需实时监测两种系统的压力、液位，确保装备运行稳定，发现异常立即停止作业、排查故障，杜绝安全隐患。

　　 The dry powder foam combined fire truck is a combined equipment upgraded from the pure dry powder fire truck. Its essence is the integration of dry powder fire truck and foam fire truck. Its core advantage is that it can flexibly switch dry powder and foam extinguishing agents according to the fire type, adapt to the disposal requirements of composite fire (such as flammable liquid+solid fire), greatly improve the flexibility and effectiveness of fire disposal, and make up for the disposal limitations of single extinguishing agent. On the basis of dry powder fire engines, this model adds foam tank, foam proportioner and other core components of foam fire extinguishing system, which should also comply with GB7956.3 Fire Vehicles Part 3 foam Fire Vehicles, GB7956.4 Fire Vehicles Part 4 Dry Powder Fire Vehicles and GB7956.1 general standards; Its use, maintenance and repair should strictly follow the relevant operating specifications of dry powder fire truck and foam fire truck, and focus on the coordination of the two systems. The specific practical operations are supplemented as follows: 1. " Switching operation: During operation, it is necessary to accurately switch the fire extinguishing agent mode according to the type of fire, strictly following the requirements of GB7956.3, GB7956.4, and GB7956.1 standards - when extinguishing flammable gas or live equipment fires, switch to dry powder mode, and the operation process is completely consistent with that of pure dry powder fire trucks; When putting out a large area of flammable liquid fire, switch to foam mode. First check that the foam liquid reserves in the foam tank are sufficient and the foam proportioner works normally. Start the foam pump, adjust the mixing ratio to the standard range (generally 3% -6%), spray foam through the foam monitor or foam gun, ensure that the foam evenly covers the liquid surface, insulates oxygen, and suppresses the fire. All performances of the foam system must meet the GB7956.3 standard; When dealing with compound fire, dry powder can be used to quickly control the open fire, and then switch to foam mode to consolidate the fire extinguishing effect and effectively prevent fire recurrence. After switching modes, it is necessary to conduct a 10-15 second trial spraying to confirm that the fire extinguishing agent is spraying normally before carrying out formal fire extinguishing operations to avoid pipeline blockage or abnormal mode switching affecting disposal efficiency. 2. Coordination attention: when switching the extinguishing agent mode, it is necessary to first shut down the power system of the current mode (turn off the nitrogen gas cylinder group in the dry powder mode, and turn off the foam pump in the foam mode), wait until the residual extinguishing agent in the pipeline is completely discharged, and then start another mode to prevent the dry powder and foam from mixing and caking, blocking the pipeline or affecting the fire extinguishing effect; During the homework process, it is necessary to monitor the pressure and liquid level of both systems in real time to ensure stable equipment operation. If any abnormalities are found, the work should be stopped immediately, and faults should be investigated to eliminate safety hazards.

　　三、干粉水联用消防车  

　　3、 Dry powder water combined fire truck   

　　干粉水联用消防车与干粉泡沫联用消防车类似，同样是纯干粉消防车的升级组合款，是干粉消防车与水罐消防车的融合装备，兼具干粉灭火的快速高效和水灭火的降温冷却优势，适用于扑救可燃固体火灾、带电设备火灾及各类复合型火灾，能有效解决单一灭火剂处置火情的局限性，提升火情处置的全面性和有效性。该车型在干粉消防车基础上，增设水罐、水泵、水炮等水灭火系统部件，需同时遵循GB7956.2《消防车第2部分水罐消防车》、GB7956.4《消防车第4部分干粉消防车》及GB7956.1通用标准；其使用、维护与保养需严格遵循干粉消防车和水罐消防车的相关规范，核心关注两种系统的协调运行，具体实操补充如下：

　　Similar to the dry powder foam combined fire truck, the dry powder water combined fire truck is also an upgraded combination of the pure dry powder fire truck. It is the integration equipment of the dry powder fire truck and the water tank fire truck. It has the advantages of fast and efficient dry powder fire extinguishing and cooling of water fire extinguishing. It is suitable for fighting combustible solid fires, live equipment fires and various composite fires, and can effectively solve the limitations of single fire extinguishing agent to deal with fire, improving the comprehensiveness and effectiveness of fire disposal. On the basis of dry powder fire trucks, this model is equipped with water extinguishing system components such as water tanks, water pumps, and water cannons, which must comply with the general standards of GB7956.2 "Fire Trucks Part 2 Water Tank Fire Trucks", GB7956.4 "Fire Trucks Part 4 Dry Powder Fire Trucks", and GB7956.1; Its use, maintenance, and upkeep must strictly follow the relevant specifications of dry powder fire trucks and water tank fire trucks, with a focus on the coordinated operation of the two systems. The specific practical supplements are as follows:

　　1.协同灭火：扑救可燃固体火灾（如木材、织物、煤炭等）时，可先使用干粉模式快速压制明火，待明火彻底扑灭后，切换至水模式，通过水炮或水枪喷射水流，对火场进行全面降温冷却，清除余火，有效防止火情复燃；扑救带电设备火灾时，仅可使用干粉模式，严禁切换水模式，避免水流导电引发触电事故；处置复合型火灾时，根据火情优先级灵活切换两种模式，先控火、后降温，确保灭火效率和作业安全。切换模式后，需先进行10-15秒试喷，确认灭火剂喷射正常后，再开展正式灭火作业，避免管路堵塞或模式切换异常影响处置效率。

　　1. Collaborative fire extinguishing: When extinguishing combustible solid fires (such as wood, fabric, coal, etc.), dry powder mode can be used to quickly suppress the open flame. After the open flame is completely extinguished, switch to water mode and use water cannons or water guns to spray water to comprehensively cool down the fire scene, remove residual fire, and effectively prevent the fire from reigniting; When extinguishing fires caused by live equipment, only dry powder mode can be used, and switching to water mode is strictly prohibited to avoid electric shock accidents caused by water flow conduction; When dealing with composite fires, flexibly switch between two modes based on the priority of the fire situation, control the fire first and then cool down, to ensure fire extinguishing efficiency and operational safety. After switching modes, it is necessary to conduct a 10-15 second trial spraying to confirm that the fire extinguishing agent is spraying normally before carrying out formal fire extinguishing operations to avoid pipeline blockage or abnormal mode switching affecting disposal efficiency.

　　2.操作规范：切换至水模式作业时，需严格遵循GB7956.2《消防车第2部分水罐消防车》及GB7956.1标准要求，先检查水罐水位充足、水泵运行正常，水管路无漏水现象，将水压调节至合适范围（0.5-1.0MPa）；喷射水流时，避免直接冲击带电体、高温容器，防止发生触电或容器炸裂事故；作业结束后，需分别对干粉系统和水系统进行收尾处理——干粉系统按纯干粉消防车流程完成吹扫、放余气操作（符合GB7956.4标准），水系统需排空管路内积水，防止冬季结冰或管路腐蚀，延长装备使用寿命，确保水系统各项性能符合GB7956.2标准。  

　　2. Operation specifications: When switching to water mode operation, it is necessary to strictly follow the requirements of GB7956.2 "Fire Trucks Part 2 Water Tank Fire Trucks" and GB7956.1 standards. First, check that the water level in the water tank is sufficient, the water pump is running normally, and there is no leakage in the water pipeline. Adjust the water pressure to the appropriate range (0.5-1.0MPa); When spraying water, avoid direct impact on charged bodies and high-temperature containers to prevent electric shock or container explosion accidents; After the homework is completed, the dry powder system and water system need to be treated separately - the dry powder system should be purged and vented according to the pure dry powder fire truck process (in compliance with GB7956.4 standard), and the water system should be drained of accumulated water in the pipeline to prevent freezing or pipeline corrosion in winter, extend the service life of equipment, and ensure that the performance of the water system meets GB7956.2 standard.   

　　本指南重点围绕干粉系列消防车的核心知识点、实操流程及注意事项展开，全程严格遵循GB7956.1-4系列国家标准要求，贴合一线消防救援人员的实战需求。实操过程中应结合装备实际情况和标准规范，遵循操作流程，开展技能演练和装备维护，不断提升实操能力，确保在实战中能够快速、高效、安全处置各类火情，全力保障人员与装备安全，确保各项作业完全符合国家标准要求。

　　This guide focuses on the core knowledge points, practical procedures, and precautions of dry powder series fire trucks, strictly following the requirements of GB7956.1-4 series national standards throughout the process, and meeting the practical needs of frontline firefighting and rescue personnel. During the practical operation, it is necessary to combine the actual situation of the equipment and standard specifications, follow the operating procedures, carry out skill drills and equipment maintenance, continuously improve practical abilities, ensure that various types of fires can be quickly, efficiently, and safely handled in actual combat, fully guarantee the safety of personnel and equipment, and ensure that all operations fully comply with national standard requirements.