CN2162569Y

CN2162569Y - Check valve

Info

Publication number: CN2162569Y
Application number: CN 93240149
Authority: CN
Inventors: 曹素梅
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-27
Filing date: 1993-09-27
Publication date: 1994-04-20
Anticipated expiration: 2003-09-27

Abstract

The utility model relates to a check valve which takes safe action in pipe-lines, comprising a seat ring, a valve seat, a valve sheet, a spring and a gas conduit. When the temper takes place, the check valve can effectively block the countercurrent flow of the gas.

Description

Check valve

The utility model relates to a kind of backstop that is used for gas pipeline, especially a kind of tempering safety check that plays the safety protection effect.

The check valve that uses in the existing fluid line has manually or sensor is controlled two kinds, when ducted gas is flammable explosive gas, (as gas welding), in use, may produce tempering, at this moment manually operated valve is untimely, and sensor is subject to the influence of environment, easily insensitive, so just cause source of the gas to produce blast probably, cause casualties and property loss.

The purpose of this utility model just provides a kind of safety check, and when tempering took place, it can block the adverse current of gas to source of the gas safely and effectively.

The purpose of this utility model is such: be with a valve seat that seals on the end of a seat ring that has an internal thread, having the valve block of gas channel and the opposite side subsides of valve seat around one faces, the position of gas channel is corresponding with valve seat, a spring be crushed on the opposite side of valve block and be enclosed within valve seat and seat ring on gas conduit between.

Owing to adopt such scheme, can block the tempering air-flow safely and reliably, and simple in structure.

Below in conjunction with an accompanying drawing and an embodiment the utility model is further specified.

Fig. 1 is a front section view of the present utility model.

1 seat ring among the figure, 2 valve seats, 3 valve blocks, 4 springs, 5 gas conduits, 6 gas channels.

In the drawings, an end of valve seat 2 is fixed on the seat ring 1, and its other end pastes with the valve block 3 that has gas channel 6 all around and faces, a spring 4 be compressed in valve block 3 and be enclosed within seat ring 1 and valve seat 2 on gas conduit 6 between; During use, seat ring 1 connects source of the gas, gas conduit 6 is received on instrument or the burner, under the normal operating condition, flow in the mesopore of gas by seat ring 1, valve block 3 is at gas pressure effect lower compression spring 4, valve block 3 and valve seat 2 separating contacting states, so gas is flow to by gas channel 6 in the chamber of gas conduit 5, is outwards flowed out by the chamber of gas conduit 5 again; When tempering took place, the pressure that gaseous combustion produces and the pressure of spring 4 oppositely promote valve block 3 together to be made it to paste again with valve seat 2 and faces, and gas channel 6 is just sealed by valve seat 2 like this, thereby has stoped the reverse flow of gas fully.

Claims

1, a kind of safety check, it is characterized in that: on an end of a seat ring that has an internal thread, be with a valve seat that seals, having the valve block of gas channel and the opposite side subsides of valve seat around one faces, the position of gas channel is corresponding with valve seat, a spring be crushed on the opposite side of valve block and be enclosed within valve seat and seat ring on gas conduit between.