末端试水装置：是为了在喷头不破裂的情况下，检验系统中很不利处喷头破裂后能否正常启动系统的装置，也就确保了系统中任何一个喷头破裂洒水均能正常开启系统

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

组成和分类

Composition and classification

组成：

form:

⑴试水阀

(1) water test valve

⑵压力表

(2) pressure gauge

⑶试水喷嘴及保护罩

(3) water test nozzle and protective cover

分类：

Classification:

⑴手动式：通过手动（手动控制阀门）控制开启和关闭。

(1) manual type: the opening and closing are controlled by manual (manual control valve).

⑵电动式：通过电动（电动控制阀门）控制开启和关闭，一般带有信号反馈装置，方便远程操控。

(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.

设置要求

Setting requirements

1试水喷嘴出水口的流量系数，应等同于同楼层或防火分区内的很小流量系数洒水喷头（确保任一个洒水喷头开启均能正常启动自喷系统）。

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末端试水装置的流量应等于系统很小洒水喷头流量（模拟很不利出喷头爆裂的情况），排水应采用孔口出流（间接排水）的方式，严禁直接排水。排水管道宜设置伸向顶的通气管（保证排水顺畅），且排水管管径应≥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：从孔口流出的水流进入大气，不受阻挡，是一种自由出流的方式。孔口出流的阻力系数很小，在相同压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设有明显标识，试水阀可以选配压力表。

(1) there are obvious signs, and the water test valve can be equipped with a pressure gauge.

⑵每个阀组控制的很不利点的喷头处（很高处很难道到达的地方）均应设末端试水装置。

(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采取措施不被挪为他用。

(3) take measures not to be used for other purposes.

⑷距地面高度宜为1.5米（便于工作人员操作）。

(4) the height from the ground should be 1.5m (convenient for staff operation).

⑸其他防火分区、楼层均应设直径为25mm的试水阀。

(5) other fire compartments and floors shall be equipped with water test valves with a diameter of 25mm.

川消讲解流程

Explanation process of Chuanxiao

通过手动或者电动打开末端试水装置（模拟很不利点喷头破裂洒水）。

Open the end water test device manually or electrically (simulate the sprinkler breaking and watering at the very unfavorable point).

水流经水流指示器，并传递信息给消防联动控制器（控制中心）。

The water flows through the water flow indicator and transmits information to the fire linkage controller (control center).

喷头破裂，因供水测静压变动压，水压变化，阀体内阀瓣两侧水压失去平衡，发版开启，供水测水流向向系统测标志着阀体开启。

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.

同时水充满延迟期，警铃响铃报警，压力开关动作直接连锁启动消防水泵。

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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