当保护区一旦发生火灾，预作用装置上的电磁阀接受到启动信号，电磁阀打开，水进入管网，短时间内完成充水过程，同时水力警铃报警。下面来看看川消预作用报警阀的灭火启动过程相关事项吧。

In case of fire in the protection zone, the solenoid valve on the pre-action device receives the start signal, the solenoid valve opens, and the water enters the pipe network. The water filling process is completed in a short time, and the hydraulic alarm bell alarms at the same time. Let's take a look at the fire extinguishing startup process of Sichuan Fire Pre-action Alarm Valve.

一、系统工作

1、 System operation

当防护区内火灾时，一方面闭式喷头被熔爆管网变成开式管网，另一方面火灾探测器将收集到火灾信号传回消防控制设备，从面打开雨淋阀侧腔导管上的电磁阀使侧腔泄压导致雨淋阀被打开，压力水经过预作用装置后进入灭火管网喷水灭火，水力警铃响铃报警，压力开关给出启泵信号，预作用装置处于工作状态。

When there is a fire in the protection zone, on the one hand, the closed sprinkler is turned into an open pipe network by melting and exploding the pipe network, on the other hand, the fire detector will send the fire signal collected back to the fire control equipment, open the solenoid valve on the side chamber duct of the deluge valve from the surface to release the pressure of the side chamber, and the deluge valve will be opened, and the pressure water will enter the fire extinguishing pipe network after passing through the pre-action device to spray water, the hydraulic alarm will ring, and the pressure switch will give the pump start signal, The pre-action device is in working condition.

二、灭火结束

2、 End of fire fighting

当水流停止时，湿式阀自动关闭，雨淋阀通过手动复位后又回到初始状态。预作用报警装置具备如下功能；防止误喷、火灾发生时开启迅速、水力警铃机械报警、压力开关给出启泵信号。

When the water flow stops, the wet valve automatically closes, and the deluge valve returns to the initial state after manual reset. The pre-action alarm device has the following functions:; Prevent spurious spray, start quickly in case of fire, hydraulic alarm bell mechanical alarm, and pressure switch giving pump start signal.

预作用阀是由雨淋阀和湿式报警阀上下串接而成，雨淋阀位于供水侧，湿式报警阀位于系统侧而成为预作用阀组。系统由预作用阀水力警铃、压力开关、空压机、空气维护装置、信号碟阀等组成，安装闭式洒水喷头，并以常用的探测系统作为报警和启动的装置。其动作原理：

The pre-action valve is composed of a deluge valve and a wet alarm valve which are connected up and down in series. The deluge valve is located at the water supply side, and the wet alarm valve is located at the system side and becomes the pre-action valve group. The system is composed of pre-action valve hydraulic alarm bell, pressure switch, air compressor, air maintenance device, signal butterfly valve, etc., closed sprinkler is installed, and common detection system is used as alarm and start device. Its action principle:

一旦发生火灾，安装在保护区感温感烟火灾探测器发出火灾报等信号。火灾报警控制器或消防控制中心，接到报警信号后发出指令打开雨淋阀上电磁阀，使雨淋阀开启，压力水流进系统侧管网，变成湿式喷水系统，同时水力警铃发出报苦，压力开关动作反馈给控制中心显示管路已充水，并启动消防泵。

In case of fire, the temperature and smoke fire detector installed in the protection area will send fire alarm and other signals. After receiving the alarm signal, the fire alarm controller or fire control center will send a command to open the solenoid valve on the deluge valve, so that the deluge valve can be opened, and the pressure water flows into the pipe network at the system side to become a wet water spraying system. At the same time, the hydraulic alarm bell will send out a distress, and the pressure switch action will feed back to the control center to show that the pipeline has been filled with water, and the fire pump will be started.

此时管道上安装闭式洒水喷头尚未释放，不会喷水。人尚可主动地经主管人员采取适当行动将火扑灭，避免喷头动作水渍造成的损失。如果火灾控制不住继续发展，致使闭式喷头玻璃球动作喷水，水泵自动启动。

At this time, the closed sprinkler installed on the pipeline has not been released and will not spray water. The person in charge can take appropriate actions to put out the fire on his own initiative to avoid the loss caused by water stains caused by the nozzle action. If the fire cannot be controlled and continues to develop, the glass ball of the closed sprinkler will act to spray water, and the water pump will start automatically.

这里，小编要提醒大家，预作用报警阀组如果被使用到了户外，应该具有宝珠装置，防止被风砂、雨露以及阳光侵蚀；不应该被使用到有易燃、易爆气体以及粉尘的环境；预作用报警阀组不适合使用在湿热带和干热带的环境中；等等，更多相关注意事项就来我们网站http://www.cx-fire.com咨询！

Here, I want to remind you that if the pre-action alarm valve group is used outdoors, it should have a bead device to prevent it from being eroded by wind, sand, rain and sunshine; It should not be used in the environment with flammable, explosive gas and dust; The pre-action alarm valve group is not suitable for use in humid and dry tropical environments; Wait, more relevant precautions will come to our website http://www.cx-fire.com consulting service