川消湿式报警阀慢报警问题的探讨
来源：http://www.cx-fire.com/ 日期：2022-08-31
在湿式自动喷水灭火系统的消防工程中，有时会遇到湿式报警阀动作不及时、报警时间慢的现象。下面就来讲讲
川消湿式报警阀慢报警问题内容。
In the fire protection engineering of the wet automatic sprinkler system, sometimes the wet alarm valve does not act in time and the alarm time is slow. The following is about the slow alarm of the wet alarm valve of Chuanxiao.
同厂家制造同型号规格的多台报警阀组安装在同一消防工程中（而控制区域不同时），当进行放水试验时，有的报警时间快，几分钟警铃就响了，个别的报警时间长达十几分钟，甚几十分钟才能报警。当发生这种情况时，许多使用单位就认为产品质量不好，甚连消防检测或验收人员都可能认为产品有问题。
Several alarm valve groups of the same model and specification manufactured by the same manufacturer are installed in the same fire protection project (while the control area is different). When the water discharge test is carried out, some alarm time is fast, and the alarm bell rings in a few minutes, and some alarm time is as long as ten minutes, or even tens of minutes. When this happens, many users think that the product quality is not good, and even the fire detection or acceptance personnel may think that the product is defective.
湿式报警阀调试时，在试水装置处放水，当湿式报警阀进口水压大于0.14MPa、放水流量大于1L/s时，报警阀应及时启动；带延迟器的水力警铃应在15—90s内发出报警铃声，不带延迟器的水力警铃应在15s内发出报警铃声；压力开关应及时动作，并反馈信号。
During commissioning of the wet alarm valve, water shall be discharged from the water testing device. When the inlet water pressure of the wet alarm valve is greater than 0.14MPa and the discharge flow is greater than 1L / s, the alarm valve shall be started in time; The hydraulic alarm bell with delay shall send out the alarm bell within 15-90s, and the hydraulic alarm bell without delay shall send out the alarm bell within 15s; The pressure switch shall act in time and feedback the signal.
喷头或试水装置放水时，报警阀应及时动作。如果根据上述三个规范（规程）的内容进行验收，这种动作不及时、报警时间慢一些的报警阀组很有可能被用户或消防权威机构判定为不合格产品。那么在工程应用中出现报警阀这种慢报警的现象到底是产品技术有问题呢？还是由于其它原因造成的呢？这就需要从湿式报警阀的工作原理谈起。
When the sprinkler or water testing device discharges water, the alarm valve shall act in time. If the acceptance is conducted according to the contents of the above three specifications (procedures), the alarm valve group with delayed action and slower alarm time is likely to be judged as unqualified by the user or the fire authority. So what is the problem with the product technology that causes the slow alarm of the alarm valve in the engineering application? Or is it caused by other reasons? This needs to start with the working principle of the wet alarm valve.
其实湿式报警阀就是一个增加了在阀瓣开启状态下有能够进行自动报警功能的单向止回阀，只允许水流从供水侧流向管网侧。自动喷水灭火系统伺应状态时，整个管网充满设计要求的压力水，湿式报警阀阀瓣由自重而关闭。
In fact, the wet alarm valve is a one-way check valve with automatic alarm function when the valve flap is opened, which only allows water flow from the water supply side to the pipe network side. When the automatic sprinkler system is in the standby state, the entire pipe network is filled with the pressure water required by the design, and the valve disc of the wet alarm valve is closed by its own weight.
在湿式系统保护区内，一旦发生火灾，在火灾温度的作用下，使闭式喷头感温启动，喷水灭火。这时湿式报警阀管网一侧水压下降，阀瓣上、下腔形成压差，在水流作用下，阀瓣开启并供水灭火。同时一部分水流入报警管道，使水力警铃发出响声报警，并使压力开关动作将电信号传报警控制中心，发出声光报警。
In the wet system protection area, once a fire occurs, the closed sprinkler will be started by temperature sensing under the effect of fire temperature, and the sprinkler will extinguish the fire. At this time, the water pressure at one side of the wet alarm valve pipe network drops, and the pressure difference between the upper and lower chambers of the valve flap forms. Under the action of water flow, the valve flap opens and supplies water for fire extinguishing. At the same time, a part of the water flows into the alarm pipeline, causing the hydraulic alarm bell to give a sound alarm, and causing the pressure switch to act to transmit the electric signal to the alarm control center to give an audible and visual alarm.
This is the end of the discussion on the slow alarm problem of Chuanxiao wet alarm valve. If you have any questions about this, please come to our website http://www.cx-fire.com Consult and understand!
