JPH0231965U

JPH0231965U -

Info

Publication number: JPH0231965U
Application number: JP11147088U
Authority: JP
Priority date: 1988-08-25
Filing date: 1988-08-25
Publication date: 1990-02-28

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す縦断面図、第２
図、第３図は第１図の拡大部分図、第４図は本考
案の異なる実施例を示す縦断面部分図、第５図は
従来例の縦断面図である。１……入口、２……出口、３……弁座、４……
弁本体、５……ふた体、６……ダイヤフラム、７
……背圧室、１０……パイロツト管路、１１……
ダイヤフラム受、１６ａ……先端縁、１７……押
え環、２０，２２……ばね受、２１，２３……ば
ね。 Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
3 is an enlarged partial view of FIG. 1, FIG. 4 is a vertical cross-sectional partial view showing a different embodiment of the present invention, and FIG. 5 is a vertical cross-sectional view of a conventional example. 1...Inlet, 2...Outlet, 3...Valve seat, 4...
Valve body, 5...Lid, 6...Diaphragm, 7
...Back pressure chamber, 10...Pilot conduit, 11...
Diaphragm receiver, 16a... tip edge, 17... presser ring, 20, 22... spring receiver, 21, 23... spring.

Claims

[Scope of utility model registration request]

A valve body 4 having a fluid inlet 1 and an outlet 2 and a valve seat 3; a diaphragm 6 disposed opposite to the valve seat 3 and functioning as a valve body for blocking or communicating the inlet 1 and the outlet 2; and the diaphragm 6. A back pressure chamber 7 formed on the opposite side of the valve seat 3 with the valve seat 6 in between.
The pressure in the back pressure chamber 7 changes depending on the fluid pressure on the outlet 2 side or the state of the destination of fluid transportation, and the pressure in the back pressure chamber 7 changes depending on the fluid pressure on the outlet 2 side or the state of the destination of fluid transportation, and the pressure in the back pressure chamber 7 changes depending on the fluid pressure on the inlet 1 side and the diaphragm 6. In the automatic opening/closing valve that opens and closes, a tip edge 1 is attached to a diaphragm receiver 11 superimposed on the surface of the diaphragm 6 on the back pressure chamber 7 side.
A presser ring 1 with its 6a in contact with the diaphragm 6
7 is movable in the central axis direction of the diaphragm 6, and is placed between the spring receivers 20, 22 fixed to the diaphragm receiver 11 and the presser ring 17 in the direction of bringing the tip edge 16a into contact with the diaphragm 6. Automatic opening/closing valve equipped with working springs 21 and 23.