Dual-valve safety device capable of being repeatedly used

Abstract

The invention discloses a dual-valve safety device capable of being repeatedly used. The device comprises a valve body, an air inlet end safety trigger plugging mechanism and an air outlet end safety trigger plugging mechanism are arranged in an inner cavity of the valve body, the valve body comprises a shell and end covers connected to the two ends of the shell, each end cover is provided with an air pipe connecting head and an air flow channel, a center ring shaft is arranged in an inner cavity of the shell, the center ring shaft is connected with the inner wall of the shell through fan-shaped pieces on the periphery of the center ring shaft, the inner cavity of the shell is divided into a left cavity and a right cavity, an air duct of the left cavity and the right cavity is formed between two fan-shaped pieces, the air inlet end safety trigger plugging mechanism and the air outlet end safety trigger plugging mechanism are correspondingly arranged in the left cavity and the right cavity and each comprise a valve element, a temperature sensitive metal and a trigger arm, a valve rod is mounted at one end of a center hole of the center ring shaft in a sliding manner, the inner end of the valve rod makes tight contact with a valve body spring in the center hole of the center ring shaft, the outer end of the valve rod is connected with a conical valve head, a clamping groove is formed in the valve rod, one end of the temperature sensitive metal is arranged in the clamping groove of the center ring shaft, and the other end of the temperature sensitive metal is connected with the trigger arms, a compression spring and steel balls. Gas can be automatically cut off, the leakage-prevention effect is good, repeated use is achieved, and the cost is low.

Description

technical field [0001] The invention relates to a safety protection device, in particular to a reusable double valve safety device. Background technique [0002] Household liquefied gas tanks currently used or occasions where low-pressure gas such as natural gas vehicles are used as combustion energy are often connected with hoses. Once the home or car catches fire, it is often impossible to close the gas valve due to the large fire or the absence of people on site. Therefore, in the event of a fire, once the gas leakage is uncontrollable after the rubber tube is burnt, it will cause the gas to leak and burn continuously, aggravate the combustion, and the gas storage tank or liquefied gas cylinder may even explode, with disastrous consequences. Therefore, if we can automatically close the gas safety valve in time without personnel or without personnel operation, it will be of great help to protect gas storage cylinders such as liquefied gas tanks and prevent gas combustion f...

AI Technical Summary

Problems solved by technology

However, the existing safety valves are often disposable safety valves. Once they fail due to their own reasons or have been used once on site, they cannot continue to be used. The cost of use is relatively high, and their structures are often equipped with sealing rubber rings. Under the influence of high temperature, the rubber is damaged and causes the secondary leakage of gas, which cannot effectively cut off the gas leakage automatically, and there are also potential safety hazards.

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