A temperature-controlled pilot sprinkler

Abstract

The invention provides a temperature control pilot type shower nozzle, and belongs to the technical field of firefighting equipment. A valve can be automatically opened, without electric power, to enable the shower nozzle to spray water when fire hazard happens, moreover, the valve is automatically closed to stop spraying water when the fire hazard is stopped, therefore, the purposes of automatic opening and closing and repeated operation are achieved. The technical scheme comprises a valve body, a main valve core, a pilot valve, a push rod component, a shape memory alloy driving spring and a bias spring.

Description

technical field [0001] The invention relates to the technical field of fire fighting equipment, in particular to a temperature-controlled pilot-operated sprinkler head. Background technique [0002] With the improvement of people's living standards and the progress of society, and the rapid development of various industries, the requirements for fire protection science are getting higher and higher, so the requirements for fire protection devices are becoming more and more stringent. In the automatic sprinkler system, the correct work of the sprinkler head plays a key role in preventing the occurrence and spread of fire. At present, the fire extinguishing sprinkler head commonly used in the fire protection system in our country uses glass bulbs or fusible metals containing easily vaporized liquids as temperature sensing and control elements. This is a wet automatic sprinkler system. Therefore, the automatic opening of the sprinkler is affected by the process of melting the ...

AI Technical Summary

Problems solved by technology

Therefore, the automatic opening of the sprinkler is affected by the melting of fusible metal or the vaporization and expansion of the liquid in the glass bubble. The automatic opening time is generally slow, usually ranging from tens of seconds to several minutes. Quick-response sprinkler head, its action time is also longer

Moreover, this type of nozzle cannot be automatically closed after it is turned on. It needs to manually close the water valve to stop working. Often after the fire is extinguished, it will cause a lot of water damage loss, and it cannot be used repeatedly. After use, it needs to be replaced with a new nozzle; A sprinkler system uses a dry sprinkler head, and there is no fire extinguishing medium in the system. When the temperature changes, methods such as temperature detection and temperature sensing must be used, and the sprinkler head will start to exhaust and fill with water to extinguish the fire. This shows that the dry automatic sprinkler system need power support

As we all know, when a fire breaks out, it is often necessary to cut off the power to avoid causing a greater spread of the disaster, so that the dry automatic fire protection system will not work due to lack of power

[0003] The above two methods are commonly used in modern fire protection systems, but both have defects, such as large loss of water damage, delayed start-up response, high cost, etc., which lead to narrow use coverage

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