A check valve

A check valve and inner hole technology, applied in the direction of sliding valve, control valve, valve device, etc., can solve the problems of delayed overload drop, production damage, high check valve failure rate, etc., to reduce back pressure and reduce turbulence. Effect
CN1620570AInactive Publication Date: 2005-05-25HYDRO FLO HLDG
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HYDRO FLO HLDG
Publication Date
2005-05-25
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A check valve comprising an outer body having an inner bore, and a reciprocating slide disposed within the inner bore for a closed position relative to the inner bore to prevent liquid flow through the valve and to allow liquid flow through the valve. Elastic means for moving between open positions of the valve and biasing the position of the reciprocating slide towards the closed position, characterized in that the reciprocating slide has a downstream portion, an upstream portion and an intermediate portion, each portion sliding fit in engagement with the bore and such that, when in the closed position, the intermediate portion sealingly engages the bore, and when in the open position, is configured to allow fluid to flow through a passage around the intermediate portion comprising at least The path through this external body.
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Description

technical field

[0001] Historically, check valves have typically had a valve or poppet within the valve body through which fluid flows, thereby closing the valve. Background technique

[0002] The shape and location of such valves or poppets previously used heretofore meant that there was a potential for significant turbulence in the vicinity of the device when it was in the open position, and any such turbulence would cause potential vibration and rotation-related sports.

[0003] Techniques tried to date include adding a rod to the valve body valve or poppet located and held within a housing having a central hole through which the rod of the valve or poppet is retained.

[0004] Attempts have been made to resist rotational motion with a rod having a non-circular cross-sectional shape that mates with a similarly shaped hole through the center of the frame.

[0005] Unfortunately, during this time, such engagement can easily lead to serious failures.

[0006] This problem...

Claims

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