Safety type cylinder valve

Abstract

The invention discloses a safety type cylinder valve which comprises a valve body. The bottom of the valve body is connected with an overflow protector which comprises a flow limiter main body, a hollow flow-limiting piston and a piston limiting spring. A first cavity and a second cavity are formed inside the flow limiter main body, wherein the first cavity is used for gas transferring, the second cavity is linked up with the first cavity, and a conical seal seat is arranged at a linkage position of the first cavity and the second cavity. The hollow flow-limiting piston is arranged inside the second cavity and can move inside the second cavity in the axial direction. A conical seal surface is arranged on the upper end portion of the flow-limiting piston, and is matched with the seal seat to form a seal. An axial flow-limiting hole is formed on the upper end portion of the flow-limiting piston which is further provided with a radial overflow hole. The piston limiting spring is arranged between the flow limiter main body and the flow-limiting piston so as to exert axial force on the flow-limiting piston. The safety type cylinder valve is capable of preventing the impacting danger of a gas cylinder after the sudden failure of the cylinder valve.

Description

technical field [0001] The invention relates to an engineering component, in particular to a gas bottle valve. Background technique [0002] At present, positive pressure air respirators are widely used in various fields such as fire protection, rescue, metallurgy, chemical industry, shipbuilding and military as respiratory protection equipment. Its working principle is to store clean compressed air through a high-pressure cylinder, release it to the first-stage pressure reducing valve through the cylinder valve, and then enter the full-face mask after being decompressed by the air supply valve for the second time, and finally provide the wearer with the mask for breathing. . Among them, the cylinder and cylinder valve carrying high-pressure compressed air play a vital role. [0003] Under the pressure of 300bar, the safety performance of the gas cylinder valve is particularly important. Once the gas cylinder valve breaks, the high-pressure compression space in the gas cyl...

AI Technical Summary

Problems solved by technology

[0003] Under the pressure of 300bar, the safety performance of the gas cylinder valve is particularly important. Once the gas cylinder valve breaks, the high-pressure compression space in the gas cylinder will be released instantly, and the huge impact will make the whole gas cylinder look like a shell Flying out, which is a very big safety hazard for the user and nearby personnel

However, none of the gas cylinder valves currently used in the market has the protection function after the gas cylinder valve is accidentally disconnected

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