预作用报警阀组工作原理及过程分享
来源：http://www.cx-fire.com/ 日期：2022-05-09
川消预作用报警阀组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。那么预作用报警阀组工作原理及过程是怎样的？
The pre-acting alarm valve group is composed of rain valve and wet alarm valve, the rain valve is located at the water supply side, the wet alarm valve is located at the system side and becomes the pre-acting valve group. So what is the working principle and process of the pre-acting alarm valve set?
预作用阀下方为雨淋阀，上方为湿式报警阀。处于伺应状态时，系统侧充有有压气体，下方雨淋阀则依靠压力腔或者隔膜腔控制水源侧的压力。
Below the pre-acting valve is the rain valve, above is the wet alarm valve. When in the waiting state, the system side is filled with pressurized gas, and the shower valve below depends on the pressure chamber or diaphragm chamber to control the pressure at the water source side.
发生火灾时，两只独立的感烟探测器形成“与”逻辑报警信号，逻辑控制器发出控制信号打开预作用报警阀组上的电磁阀（或打开手动快开阀），压力腔泄压。
In case of fire, two independent smoke detectors form “and” logic alarm signal, and the logic controller sends out control signal to open the solenoid valve on the pre-acting alarm valve set （or open the manual quick-opening valve）， and the pressure chamber relives pressure.
管网消防用水发生流动后触发流量开关、低压压力开关，有压水进入报警管路后触发压力开关、水力警铃，同时打开快速排气阀，整个系统在1min或2min内完成排气充水。
When the fire water flows in the pipe network, the flow switch and low-pressure pressure switch are triggered. When the pressurized water enters the alarm pipe, the pressure switch and hydraulic alarm bell are triggered. At the same time, the quick exhaust valve is opened, and the whole system exhausts the water in 1 or 2 minutes.
完成排气冲水后预作用系统转换为湿式系统，随着火灾温度达到喷头热熔元件设计温度，喷头元件破裂后直接出水扑救火灾。
After exhaust flushing, the pre-action system is transformed into a wet system. As the fire temperature reaches the design temperature of the nozzle hot melt element, the water will be directly discharged to fight the fire after the nozzle element is broken.
预作用报警阀组由预作用阀、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：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。
The pre-acting alarm valve group consists of pre-acting valve, hydraulic alarm bell, pressure switch, air compressor, air maintenance device, signal disc valve, etc. The closed sprinkler head is installed, and the common detection system is used as the alarm and start-up device. Its operating principle: once a fire occurs, the temperature and smoke fire detector installed in the protected area sends out fire alarm and other signals.
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。此时管道上安装闭式洒水喷头尚未释放，不会喷水。
Fire alarm controller or fire control center, after receiving the alarm signal sent instructions to open the deluge valve solenoid valve, make the deluge valve opens, the side of the pipe network pressure water flow into the system, into a wet water spray system, hydraulic alarm issued to bitter at the same time, the pressure switch back to the control center shows that line has water filling, and start the fire pump. At this time, the closed sprinkler installed on the pipeline has not been released and will not spray water.
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。火灾扑灭后，应将电磁阀关闭，使雨淋阀关闭，并排除管中的水使系统充气压力保持在0.03-0.05MPa范围内，恢复准工作状态。
People can also take the initiative to take appropriate action by the supervisor to extinguish the fire, to avoid the loss caused by sprinkler action water stains. If the fire can not be controlled and continues to develop, the glass ball of the closed sprinkler head will spray water and the pump will start automatically. After the fire is extinguished, the solenoid valve should be closed to close the rain valve, and the water in the pipe should be removed to keep the inflation pressure of the system within the range of 0.03-0.05mpa, and the quasi-working state should be restored.
The related content of the working principle and process of the pre-acting alarm valve group is said above. If you have any questions about this, you may as well come directly to the sichuan consumers website www.cx-fire.com for consultation!
