Gravity Mechanical Fire Safety Valve

Abstract

The invention provides a gravity-type mechanical fireproof safety valve and belongs to the field of gas valves. The gravity-type mechanical fireproof safety valve comprises a valve element, a left end cover, a shell, a hot melting belt, an iron block, a right end cover and a cross rod. One end of the valve element is a cone, the other end of the valve element is a rectangular column, and a round through hole is formed in the position, close to the top end, of the rectangular column; a fine thread is arranged on the outer ring surface of the left end cover, an air outlet is formed in the middle of the left end cover, one end of the air outlet is round, and the other end of the air outlet is conical. The cone at one end of the valve element is smaller than the conical air outlet of the left end cover. Fine inner threads are arranged in the two ends of the shell, and an embedding hole is formed in the center of one end of the shell; a fine thread is arranged on the outer ring surface of the right end cover, and an air inlet is formed in the middle of the right end cover. The left end cover and the right end cover are tightened at the two ends of the shell respectively. The rectangular column at one end of the valve element penetrates through the embedding hole of the shell, and the cross rod is inserted in the round through hole of the rectangular column.

Description

technical field [0001] The invention relates to the field of gas valves, in particular to a gravity-type mechanical fire safety valve. Background technique [0002] Currently used liquefied gas tanks or combustible gases, such as natural gas vehicles, are usually used to burn combustible gases. Usually, hoses are usually connected for the convenience of laying out pipelines. When the valve of the gas pipeline cannot be closed because the personnel are not at the scene, and the rubber pipe at the fire scene burns and breaks, the gas leakage cannot be controlled, which will cause the gas to accelerate and uncontrollably leak and burn. Gas storage tanks or liquefied gas cylinders There may even be a danger of an explosion, and the consequences will be disastrous. Therefore, if the gas safety valve can be automatically closed in time when there is no personnel or people are required to operate and close the gas valve and put out the fire, it will have a huge effect on protectin...

AI Technical Summary

Problems solved by technology

Since the hot-melt parts are not installed in the vent pipe, when a fire occurs in the vent pipe, the valve body needs to conduct heat to transfer the heat to the hot-melt parts. Only when the hot-melt parts melt can the pipeline be closed. This often takes a certain amount of time, so the effect is not good. it is good

Since the fire will spread quickly when the pipeline catches fire, the performance of the above-mentioned fire safety valve that can automatically close the pipeline is not good, and it cannot play a good fire prevention effect.

Moreover, since the spring is in a compressed state for a long time, it is likely to lose its elasticity, or its elasticity will become weak, so that the performance of the fire safety valve to automatically close the pipeline will be poor or cannot be automatically closed.

[0005] The patent application publication number CN102537457A discloses a fire safety valve, which consists of a valve body, a switch valve, a thimble, a joint, a spring, a steel ball, a spring and a "○" type sealing ring. It has the following disadvantages: one, the use of joints as Combustion, because the thickness of the joint is relatively large, it needs to absorb a large amount of heat to melt, and the record is that the passage can be automatically closed after combustion, so it takes a long time to react; second, use a sealing ring as a sealing device, which is known to those skilled in the art The sealing ring is generally made of rubber. The rubber sealing ring is easy to melt or burn in a high temperature environment, so that the safety valve loses its safe fire prevention and leakage prevention function, and it cannot be used due to its own failure or after being used once. The cost is high; third, the spring is used as an important part to close the pipeline. Since the spring is in a compressed state for a long time, it is likely to lose its elasticity, or the elasticity will become weak, so that the performance of the fire safety valve to automatically close the pipeline will be deteriorated or cannot be automatically closed. closure

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