Passive thermo-responsive initiator for extinguishment

Abstract

The invention relates to a passive heat reactive fire-fighting starter which is used in a supersonic dry powder fire extinguisher. The passive heat reactive fire-fighting starter comprises a pedestal and a blank cap body which is fixed on the pedestal; a magnetic power source which consists of a magnetic rod and an armature and is arranged in the pedestal and the blank cap body; a heat reactive ejection mechanism is arranged on the blank cap body, supports a dowel by a heat reactive element and locks the magnetic rod by the dowel to cause the magnetic rod to locate in the position to prop and press against a spring to shrink. When ambient temperature reaches a preset temperature, the heat reactive element is started, so that the magnetic rod is sprung out and goes through the armature to generate induction current so as to start an igniter to ignite. The passive heat reactive fire-fighting starter of the invention realizes heat reactive passive startup and provides convenient conditions for the supersonic dry powder fire extinguishers to be conveniently used in outdoor passive areas and has the advantages of rational structure, quick response, reliable action, high sensitivity, high safety, strong environmental adaptability, electromagnetic interference resistance, etc.

Description

technical field [0001] The invention relates to a heat sensitive fire extinguishing starter, in particular, it is a passive heat sensitive fire extinguishing starter. Background technique [0002] In the existing technology, Shaanxi Jian'an Engineering Equipment Co., Ltd. has released a supersonic dry powder fire extinguisher in recent years. It is different from ordinary pneumatic dry powder fire extinguishers. etc.), but rely on the gas produced by the combustion of the solid fuel carried by itself, the gas passes through the supersonic gas generator to form a supersonic airflow, and then directly sprays out the dry powder in the form of two-phase flow. It has the characteristics of fast starting speed and high fire extinguishing efficiency. If the supersonic dry powder fire extinguisher is used in a place with power supply (such as urban buildings, warehouses, etc.), the fire controller generally sends a starting current to the ignition head of the fire extinguisher acco...

AI Technical Summary

Problems solved by technology

Although the idea of ​​this heat-sensitive activation is good, it is specially designed for dry powder fire extinguishers of the air pressure cylinder type, and cannot be applied to the above-mentioned supersonic dry powder fire extinguishers activated by the ignition head

Furthermore, the structure of this patent is not nearly perfect. For example, the sealing gasket of the bottle mouth is compressed by the push rod through the support assembly, but the push rod does not compress the fixed structure, so its safety cannot be guaranteed.

Even if the ejector rod is changed into a wedge shape, and the valve port is pressed down to plug the valve port, its structure is not reliable enough.

In addition, its starting sensitivity and reliability are also questionable, because the upper and lower end surfaces of the cylindrical support component are in full contact with the ejector rod and the bottle seal, and the frictional resistance is relatively large during the action, which affects the sensitivity of the action.

Furthermore, when the heat-sensitive device is in action, the cylinder must be coaxially expanded with the axis of the ejector rod, so that the ejector rod can be opened and the compression of the bottle mouth sealing gasket can be lost. If the cylinder is not installed enough to match the ejector If the rod is coaxial, it may cause part of the support for the ejector rod to be retained during the action, reducing the sensitivity and reliability of the action

In addition, the role of auxiliary elasticity in the cylinder is not clear, and it seems to have no effect

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