Filling limiting cylinder valve

Abstract

The invention discloses a filling limiting cylinder valve which comprises a valve body, a valve element and a first spring, wherein a sliding sleeve capable of doing reciprocating motions in a way of facing to the valve element and a plug screw used for mounting the sliding sleeve into a clamping seat are mounted in the clamping seat on a side wall of the valve body, the plug screw is provided with an iron core extending into the sliding sleeve and used for driving the sliding sleeve through magnetic force to slide to the valve element, the exterior of the sliding sleeve is provided with a second spring used for keeping a tendency that the sliding sleeve slides away from the valve element, a step hole is formed in a runner, a cone part capable of blocking the stepped hole to seal the runner when the valve element moves downward is formed in the valve element, and the sliding sleeve and the valve element are arranged to be that the sliding sleeve stops the valve element moving downward when the sliding sleeve slides to the valve element. Since the filling limiting cylinder valve provided by the invention is arranged to be that the valve element moves downward to close the runner of the cylinder valve, the requirements of relatively great air demand and inflating volume of an electromagnetic filling limiting cylinder valve can be met completely. When the valve element moves downward, all that is needed is to overcome the elastic force of the first spring, and the reliability and the stability of the work of the valve element are ensured.

Description

technical field [0001] The invention relates to the technical field of cylinder valves, in particular to a cylinder valve capable of restricting illegal filling. Background technique [0002] With the rapid development of science and technology, the management of liquefied gas cylinders has also entered the stage of information management. The identity mark is added to the liquefied gas cylinder, and the legal fixed-point filling is realized through whether the intelligent electromagnetic filling gun is identified or not, and this is used to limit the illegal filling of liquefied gas at those illegal filling points. [0003] Existing electromagnetic limited filling bottle valves, such as a liquefied gas cylinder valve disclosed by the application number CN201410540086.7, have a valve core that can move up and down along the flow channel in the valve body flow channel of the valve, and utilize the up and down movement of the valve core to Move to open and close the runner. ...

AI Technical Summary

Problems solved by technology

[0004] Since the space of the valve body is limited, the movable space of the spool is also limited, and the three position states of the spool directly lead to the extremely limited space for the spool to move upward and downward, thus making The opening area of ​​the sealing ring opening up and down the stepped hole is also extremely narrow

Therefore, the gas supply and inflation volume of this electromagnetic limited filling valve are extremely limited, which cannot meet the demand of large volume.

In addition, the sliding sleeve of this electromagnetic bottle filling limit valve must be processed to avoid the avoidance hole when the valve core moves down at the rear end of the blocking valve core, which increases the processing technology and cost of the sliding sleeve.

In addition, since the opening and closing of the flow channel depends on the sealing cooperation between the sealing ring and the stepped hole, the sealing ring needs to be tightly pressed against the wall of the stepped hole to form a good sealing effect, but the sealing ring is too tight for the stepped hole. Tight pressure will increase the movement resistance of the sealing ring, and when the valve core moves down, it needs to overcome the spring force, which will make it difficult for the sealing ring to move in the stepped hole, which will also cause the valve core to fail to open and close the flow channel normally, making it difficult to Guarantee that the electromagnetic bottle filling limit valve can work normally

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