干式喷水灭火系统：

Dry sprinkler system:

干式喷水灭火系统是在湿式系统的基础上发展起来的，以满足在寒冷和高温场所安装自动灭火系统的需要。该系统由封闭式喷嘴、管路系统、干式报警阀、报警装置、充气设备、排气设备和供水设备组成。管道和喷嘴中通常没有水，只是处于充气状态，所以称为干式系统或干式管道系统。

Dry sprinkler system is developed on the basis of wet system to meet the needs of installing automatic fire extinguishing system in cold and high temperature places. The system consists of closed nozzle, pipeline system, dry alarm valve, alarm device, inflation equipment, exhaust equipment and water supply equipment. There is usually no water in the pipe and nozzle, but it is in the inflated state, so it is called dry system or dry piping system.

干式喷水灭火系统的主要特点是报警阀后面的管路没有水，不怕结冰和环境温度高。因此，该系统适用于环境温度低于4℃、高于70℃的建筑物和场所。与湿式喷水系统相比，干式喷水系统需要增加一套充气设备，并且要求管网内的气压保持在一定范围内。因此，管理更复杂，投资也更大。洒水器在灭火方面不如湿式系统快。

The main feature of dry sprinkler system is that there is no water in the pipeline behind the alarm valve, and it is not afraid of ice and high ambient temperature. Therefore, the system is applicable to buildings and places where the ambient temperature is lower than 4 ℃ and higher than 70 ℃. Compared with the wet sprinkler system, the dry sprinkler system needs to add a set of inflation equipment, and the air pressure in the pipe network is required to be kept within a certain range. Therefore, the management is more complicated and the investment is larger. Sprinklers are not as fast as wet systems in extinguishing fires.

预作用喷水灭火系统：

Pre action sprinkler system:

预作用系统将火灾自动探测报警技术与自动喷水灭火系统有机结合，起到保护被保护物体的双重作用。预作用系统由封闭式喷水器、管道系统、雨淋阀、火灾探测器、报警控制装置、充气设备、控制组件和供水部件组成。这种系统通常是干式的，一旦发生火灾，可以实现火灾的初步报警，并立即将管网灌满水，使系统转为湿式。

The pre action system organically combines the automatic fire detection and alarm technology with the automatic sprinkler system to protect the protected objects. The pre action system consists of closed sprinkler, pipeline system, deluge valve, fire detector, alarm control device, inflation equipment, control components and water supply components. This system is usually dry-type. In case of fire, it can realize the preliminary alarm of fire, and immediately fill the pipe network with water to turn the system into wet type.

川消小编提示，系统的这个改造过程中包含了预备作用的功能，所以称为预备作用喷水灭火系统。该系统通常在雨淋阀后面的管道中充满低压气体。发生火灾时，安装在保护区内的感温感烟感火灾探测器发出火灾报警信号，控制器开启报警信号，同时声光显示报警信号。雨淋阀让水进入管道并在极短的时间内完成注水过程，将系统变为湿式系统，后续动作与湿式系统相同。

Chuanxiao Xiaobian pointed out that the transformation process of the system includes the function of preparation, so it is called the preparation sprinkler system. The system is usually filled with low-pressure gas in the pipeline behind the deluge valve. In case of fire, the temperature and smoke fire detectors installed in the protection zone will first send out the fire alarm signal, the controller will turn on the alarm signal, and the sound and light display the alarm signal at the same time. The deluge valve allows water to enter the pipeline and completes the water injection process in a very short time, turning the system into a wet system. The subsequent actions are the same as those of the wet system.

(1)与湿式系统相比，该系统通常在预作用阀后的管网中不充水，而是充入低压空气或氮气，或干式管道。只有在发生火灾时，火灾探测系统才会自动打开预作用阀，使管道充水进入湿式系统。管网通常是无水的，可以避免系统损坏造成的水损。

(1) Compared with the wet system, the system usually does not fill water in the pipe network behind the preaction valve, but fills low-pressure air or nitrogen, or dry pipes. Only in case of fire, the fire detection system will automatically open the preaction valve to fill the pipeline into the wet system. The pipe network is usually anhydrous, which can avoid water loss caused by system damage.

(2)此外，本系统设有预警装置，可在喷头动作前及时报警，尽快组织救援。相反，湿式系统必须在喷水后报警。

(2) In addition, the system is equipped with an early warning device, which can give an alarm in time before the nozzle acts, and organize rescue as soon as possible. On the contrary, the wet system must alarm after spraying water.

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