川消講解“末端試水裝置”設(shè)置要求
來源：http://www.xintli.net/ 日期：2022-07-05
末端試水裝置：是為了在噴頭不破裂的情況下，檢驗系統(tǒng)中很不利處噴頭破裂后能否正常啟動系統(tǒng)的裝置，也就確保了系統(tǒng)中任何一個噴頭破裂灑水均能正常開啟系統(tǒng)
End water test device: it is a device to check whether the system can be started normally after the sprinkler in the system is broken, so as to ensure that any sprinkler in the system can be started normally when the sprinkler is broken
組成和分類
Composition and classification
組成：
form:
⑴試水閥
(1) water test valve
⑵壓力表
(2) pressure gauge
⑶試水噴嘴及保護(hù)罩
(3) water test nozzle and protective cover
分類：
Classification:
⑴手動式：通過手動（手動控制閥門）控制開啟和關(guān)閉。
(1) manual type: the opening and closing are controlled by manual (manual control valve).
⑵電動式：通過電動（電動控制閥門）控制開啟和關(guān)閉，一般帶有信號反饋裝置，方便遠(yuǎn)程操控。
(2) electric type: the opening and closing are controlled by electric (electric control valve), which is generally equipped with signal feedback device to facilitate remote control.
設(shè)置要求
Setting requirements
1試水噴嘴出水口的流量系數(shù)，應(yīng)等同于同樓層或防火分區(qū)內(nèi)的很小流量系數(shù)灑水噴頭（確保任一個灑水噴頭開啟均能正常啟動自噴系統(tǒng)）。
1 the flow coefficient of the water test nozzle outlet should be equal to the sprinkler with a small flow coefficient in the same floor or fire compartment (ensure that the automatic sprinkler system can be started normally when any sprinkler is turned on).
2末端試水裝置的流量應(yīng)等于系統(tǒng)很小灑水噴頭流量（模擬很不利出噴頭爆裂的情況），排水應(yīng)采用孔口出流（間接排水）的方式，嚴(yán)禁直接排水。排水管道宜設(shè)置伸向頂?shù)耐夤埽ūＷC排水順暢），且排水管管徑應(yīng)≥75mm。
2. The flow of the end water test device should be equal to the flow of the system's small sprinkler head (simulating the situation that is very unfavorable to the bursting of the sprinkler head). The way of orifice outflow (indirect drainage) should be used for drainage, and direct drainage is strictly prohibited. The drainage pipe should be equipped with a vent pipe extending to the top (to ensure smooth drainage), and the diameter of the drainage pipe should be ≥ 75mm.
注：從孔口流出的水流進(jìn)入大氣，不受阻擋，是一種自由出流的方式。孔口出流的阻力系數(shù)很小，在相同壓力下可以得到很大的出流量。
Note: the water flowing out of the orifice enters the atmosphere unobstructed, which is a way of free outflow. The resistance coefficient of orifice outflow is very small, and a large outflow can be obtained under the same pressure.
其他要求：
Other requirements:
⑴設(shè)有明顯標(biāo)識，試水閥可以選配壓力表。
(1) there are obvious signs, and the water test valve can be equipped with a pressure gauge.
⑵每個閥組控制的很不利點(diǎn)的噴頭處（很高處很難道到達(dá)的地方）均應(yīng)設(shè)末端試水裝置。
(2) the end water test device shall be set at the nozzle at the very unfavorable point controlled by each valve group (very high and very accessible place).
⑶采取措施不被挪為他用。
(3) take measures not to be used for other purposes.
⑷距地面高度宜為1.5米（便于工作人員操作）。
(4) the height from the ground should be 1.5m (convenient for staff operation).
⑸其他防火分區(qū)、樓層均應(yīng)設(shè)直徑為25mm的試水閥。
(5) other fire compartments and floors shall be equipped with water test valves with a diameter of 25mm.
Explanation process of Chuanxiao
通過手動或者電動打開末端試水裝置（模擬很不利點(diǎn)噴頭破裂灑水）。
Open the end water test device manually or electrically (simulate the sprinkler breaking and watering at the very unfavorable point).
水流經(jīng)水流指示器，并傳遞信息給消防聯(lián)動控制器（控制中心）。
The water flows through the water flow indicator and transmits information to the fire linkage controller (control center).
噴頭破裂，因供水測靜壓變動壓，水壓變化，閥體內(nèi)閥瓣兩側(cè)水壓失去平衡，發(fā)版開啟，供水測水流向向系統(tǒng)測標(biāo)志著閥體開啟。
The nozzle is broken, because the static pressure of the water supply measurement changes, the water pressure changes, the water pressure on both sides of the valve disc in the valve body loses balance, and the plate is opened. The water supply measurement water flow direction system marks the opening of the valve body.
同時水充滿延遲期，警鈴響鈴報警，壓力開關(guān)動作直接連鎖啟動消防水泵。
At the same time, during the delay period of water filling, the alarm bell rings, and the pressure switch acts to directly interlock and start the fire pump.
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