川消濕式報(bào)警閥慢報(bào)警問(wèn)題的探討
來(lái)源：http://www.xintli.net/ 日期：2022-08-31
在濕式自動(dòng)噴水滅火系統(tǒng)的消防工程中，有時(shí)會(huì)遇到濕式報(bào)警閥動(dòng)作不及時(shí)、報(bào)警時(shí)間慢的現(xiàn)象。下面就來(lái)講講
川消濕式報(bào)警閥慢報(bào)警問(wèn)題內(nèi)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.
同廠家制造同型號(hào)規(guī)格的多臺(tái)報(bào)警閥組安裝在同一消防工程中（而控制區(qū)域不同時(shí)），當(dāng)進(jìn)行放水試驗(yàn)時(shí)，有的報(bào)警時(shí)間快，幾分鐘警鈴就響了，個(gè)別的報(bào)警時(shí)間長(zhǎng)達(dá)十幾分鐘，甚幾十分鐘才能報(bào)警。當(dāng)發(fā)生這種情況時(shí)，許多使用單位就認(rèn)為產(chǎn)品質(zhì)量不好，甚連消防檢測(cè)或驗(yàn)收人員都可能認(rèn)為產(chǎn)品有問(wèn)題。
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.
濕式報(bào)警閥調(diào)試時(shí)，在試水裝置處放水，當(dāng)濕式報(bào)警閥進(jìn)口水壓大于0.14MPa、放水流量大于1L/s時(shí)，報(bào)警閥應(yīng)及時(shí)啟動(dòng)；帶延遲器的水力警鈴應(yīng)在15—90s內(nèi)發(fā)出報(bào)警鈴聲，不帶延遲器的水力警鈴應(yīng)在15s內(nèi)發(fā)出報(bào)警鈴聲；壓力開(kāi)關(guān)應(yīng)及時(shí)動(dòng)作，并反饋信號(hào)。
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.
噴頭或試水裝置放水時(shí)，報(bào)警閥應(yīng)及時(shí)動(dòng)作。如果根據(jù)上述三個(gè)規(guī)范（規(guī)程）的內(nèi)容進(jìn)行驗(yàn)收，這種動(dòng)作不及時(shí)、報(bào)警時(shí)間慢一些的報(bào)警閥組很有可能被用戶(hù)或消防權(quán)威機(jī)構(gòu)判定為不合格產(chǎn)品。那么在工程應(yīng)用中出現(xiàn)報(bào)警閥這種慢報(bào)警的現(xiàn)象到底是產(chǎn)品技術(shù)有問(wèn)題呢？還是由于其它原因造成的呢？這就需要從濕式報(bào)警閥的工作原理談起。
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.
其實(shí)濕式報(bào)警閥就是一個(gè)增加了在閥瓣開(kāi)啟狀態(tài)下有能夠進(jìn)行自動(dòng)報(bào)警功能的單向止回閥，只允許水流從供水側(cè)流向管網(wǎng)側(cè)。自動(dòng)噴水滅火系統(tǒng)伺應(yīng)狀態(tài)時(shí)，整個(gè)管網(wǎng)充滿設(shè)計(jì)要求的壓力水，濕式報(bào)警閥閥瓣由自重而關(guān)閉。
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.
在濕式系統(tǒng)保護(hù)區(qū)內(nèi)，一旦發(fā)生火災(zāi)，在火災(zāi)溫度的作用下，使閉式噴頭感溫啟動(dòng)，噴水滅火。這時(shí)濕式報(bào)警閥管網(wǎng)一側(cè)水壓下降，閥瓣上、下腔形成壓差，在水流作用下，閥瓣開(kāi)啟并供水滅火。同時(shí)一部分水流入報(bào)警管道，使水力警鈴發(fā)出響聲報(bào)警，并使壓力開(kāi)關(guān)動(dòng)作將電信號(hào)傳報(bào)警控制中心，發(fā)出聲光報(bào)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.
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