JPS58178504U

JPS58178504U - swing back prevention valve

Info

Publication number: JPS58178504U
Application number: JP7644882U
Authority: JP
Inventors: 三宅　恵; 和田　「あ」
Original assignee: Kobe Steel Ltd
Current assignee: Kobe Steel Ltd
Priority date: 1982-05-24
Filing date: 1982-05-24
Publication date: 1983-11-29

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図はこの考案の揺れ戻り防止弁の断面図を、含む流
体回路図、第２図ａはアクチュエータの停止操作時にお
ける高圧側主回路の時間と圧力の特性曲線図、第２図す
は低圧側主回路の時間と圧力の特性曲線図、第３図は圧
力制御弁の圧力と流量の特性曲線図、第４図は従来技術
の回路図である。１・・・アクチュエータ、２．　２’・・・主回路、３
゜３′・・・圧力制御弁、４・・・カウンタバランス弁
、５゜５′・・・弁箱、６．６′・・・筒状栓、７．７
′・・・弁体、８．８′・・・大径内孔、９．９′・・
・小径内孔、１１゜１１′・・・スリーブ、１２．１２
’・・・大径部、１３゜１３′・・・小径部、１５．１
５’・・・第？圧力室、１６．１６’・・・逆止弁、１
７．１７’・・・内孔、１９．１９’・・・弁座、２０
．２０’・・・第１圧力室、２１．２１’・・・ばね室
、２３．２３’・・・絞り、２４．２４’・・・ばね、
２８．２８’・・・絞り、Ａ。Ａ′・・・揺れ戻り防止弁。Fig. 1 is a fluid circuit diagram including a sectional view of the swing back prevention valve of this invention, Fig. 2a is a characteristic curve of time and pressure of the high pressure side main circuit during actuator stop operation, and Fig. 2 FIG. 3 is a characteristic curve diagram of time and pressure of the low-pressure side main circuit, FIG. 3 is a characteristic curve diagram of pressure and flow rate of the pressure control valve, and FIG. 4 is a circuit diagram of the prior art. 1... actuator, 2. 2'...Main circuit, 3
゜3'...Pressure control valve, 4...Counter balance valve, 5゜5'...Valve box, 6.6'...Cylindrical plug, 7.7
'... Valve body, 8.8'... Large diameter inner hole, 9.9'...
・Small diameter inner hole, 11°11'...Sleeve, 12.12
'...Large diameter part, 13°13'...Small diameter part, 15.1
5'...th? Pressure chamber, 16.16'...Check valve, 1
7.17'... Inner hole, 19.19'... Valve seat, 20
．． 20'...First pressure chamber, 21.21'...Spring chamber, 23.23'...Aperture, 24.24'...Spring,
28.28'...Aperture, A. A'... Swing back prevention valve.

Claims

[Scope of utility model registration request]

A valve body having a large-diameter inner hole and a small-diameter inner hole, a large-diameter portion and a small-diameter portion, and a check valve that are slidably fitted into the large-diameter inner hole and small-diameter inner hole, respectively. This check valve has a sleeve with an inner hole that forms the valve seat that this check valve comes into contact with, and a spring that is formed on the large diameter side of the sleeve and connects to one side of the actuator and that presses the sleeve. a spring chamber; a first pressure chamber formed on the side of the small diameter portion of the sleeve; the inner hole of the sleeve is open; and the first pressure chamber is connected to the spring chamber via a throttle; and between the large diameter portion and the small diameter portion of the sleeve. and a second pressure chamber connected to the spring chamber via a throttle when the check valve is separated from the valve seat.