Temperature sensing element of automatic spraying firefighting apparatus

Abstract

The invention relates to a temperature sensing element of an automatic sprinkler fire extinguishing device, and pertains to the technical field of fire-fighting equipment, in particular to the technical field of the automatic sprinkler fire extinguishing device. The invention comprises two shells, each of which takes a shape of a cylinder with one end closed; one end of the crust is a hemisphere shape while the other end is an inclined plane; the two shells are fitly connected with each other through the inclined plane, meanwhile, a cavity which is enclosed by the two shells is filled with fusible alloy. The invention uses the fusible alloy as the temperature sensing material, therefore the fusible alloy melts when the operating temperature is achieved in the environment; as the hydraulicpressure acting on the temperature sensing element which is made from the fusible alloy in a water injection valve, the couple of shells slide on the inclined plane and results in the separation and abscission, namely, the water injection valve is opened, thus playing a role in water spray and fire extinction. The invention has simple structure, accurate and reliable operating temperature, long service life, quick response, thereby being applicable to the replacement of a bulb sprinkler head.

Description

technical field [0001] The invention relates to the technical field of fire-fighting equipment, in particular to the technical field of automatic sprinkler fire extinguishing devices. Background technique [0002] All modern buildings are equipped with automatic sprinkler devices. The key element to control its action is the temperature sensing element connected to the pipeline. These widely used temperature sensing elements are generally glass bubble type temperature sensing elements (also known as glass bulb nozzles), which use certain chemical reagents as temperature sensing elements. Liquid is filled into a sealed cylindrical glass bubble. When the room temperature rises to a certain temperature due to a fire in the room, the liquid in the bubble expands and vaporizes. When the air pressure rises to a certain level, the glass bubble bursts, causing the specially designed water spray valve to open, that is, the water source automatically sprays water to extinguish the fi...

AI Technical Summary

Problems solved by technology

This kind of device has a complex structure and high cost, and because the fusible metal is prone to creep, low mechanical strength, and poor corrosion resistance, it also affects its operational reliability, and it cannot directly replace the glass ball nozzle, which is not conducive to its automatic use. Popularization and Application of Temperature Sensing Elements in Sprinkler Fire Extinguishing Devices

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