Shaft-connected acetylene gas cylinder valve

Abstract

The invention discloses a shaft-connected acetylene gas cylinder valve. The gas cylinder valve comprises a valve body, a valve element assembly is installed in the valve body, a valve rod penetrates the top end of a valve body, the valve element assembly is provided with a concave hole with an upward opening port, the bottom end of the valve rod extends into the concave hole of the valve element assembly and is in clearance fit with the concave hole, and a compression spring is arranged between the bottom end of the valve rod and the valve element assembly; and an air inlet and outlet channelis formed in the valve body, the bottom end of the air inlet and outlet channel is provided with a stainless steel wire filter screen and a wool felt filter screen through a check ring. A certain matching clearance is reserved between the valve rod and the valve assembly, the eccentric problem caused by the coaxiality tolerance of parts can be adjusted, so that the good opening and closing performance and the sealing performance of the valve are ensured; under the thrust of the compression spring, the valve rod and a sealing flat gasket form good extrusion sealing, and the sealing performanceof the valve rod is ensured to be very good in a high and low pressure state; and the stainless steel wire filter screen and the wool felt filter screen play a good filtering effect, impurities can beprevented from entering the valve body.

Description

technical field [0001] The invention relates to the technical field of gas cylinder valves, in particular to a shaft-coupled acetylene gas cylinder valve. Background technique [0002] Acetylene valves in the prior art have relatively high requirements on the coaxiality of each part. If the coaxiality requirements of each part are not up to standard, the following problems are likely to occur during the use of the valve: the valve is not opened and closed smoothly, and there is a stuck phenomenon; The difference in the coaxiality of each part leads to the eccentric phenomenon of the valve stem (needle type) and the valve body after the valve is assembled, which eventually leads to poor sealing performance of the valve. Moreover, the acetylene valve in the prior art still has the problem of poor filtering effect. Contents of the invention [0003] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a shaft-coupled ace...

AI Technical Summary

Problems solved by technology

[0002] Acetylene valves in the prior art have relatively high requirements on the coaxiality of each part. If the coaxiality requirements of each part are not up to standard, the following problems are prone to occur during the use of the valve: the opening and closing of the valve is not smooth, and there is a jamming phenomenon; The difference in the coaxiality of each part leads to the eccentric phenomenon of the valve stem (needle type) and the valve body after the valve is assembled, which eventually leads to poor sealing performance of the valve.

Moreover, the acetylene valve of the prior art also has the problem of poor filtering effect

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