JPH048883U

JPH048883U -

Info

Publication number: JPH048883U
Application number: JP4994390U
Authority: JP
Priority date: 1990-05-14
Filing date: 1990-05-14
Publication date: 1992-01-27

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図は逆止弁部分の拡大図、第４図は従来
例の縦断面略図である。１……入口、２……出口、３……弁座、４……
弁本体、６……弁体、７……背圧室、８……パイ
ロツト室、９……バイパス路、１０……パイロツ
ト管路、１２……背圧路、１５……逆止弁、１６
……弁室、１７……弁体、１８……絞り通孔。 Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
FIG. 3 is an enlarged view of the check valve portion, and FIG. 4 is a schematic vertical cross-sectional view of a conventional example. 1...Inlet, 2...Outlet, 3...Valve seat, 4...
Valve body, 6... Valve body, 7... Back pressure chamber, 8... Pilot chamber, 9... Bypass path, 10... Pilot pipe line, 12... Back pressure path, 15... Check valve, 16
... Valve chamber, 17 ... Valve body, 18 ... Throttle hole.

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 valve body 6 disposed opposite to the valve seat 3, and a valve body 4 formed on a side of the valve body 6 opposite to the valve seat 3. A back pressure chamber 7, a pilot chamber 8 that communicates with the pipeline on the outlet 2 side or a fluid transportation destination via a pilot pipeline 10, and a bypass passage 9 that communicates the pilot chamber 8 with the inlet 1. and a back pressure passage 12 that communicates the back pressure chamber 7 with the pilot chamber 8 or the bypass passage 9; and a throttle passage 18 that constantly communicates the back pressure chamber 7 with the pilot chamber 8 or the bypass passage 9. The back pressure path 1 is provided with a valve body 17 made of an elastic material that closes when facing the back pressure chamber 7.
An automatic opening/closing valve consisting of a check valve 15 provided at 2.