JPS61108581U

JPS61108581U -

Info

Publication number: JPS61108581U
Application number: JP19228184U
Authority: JP
Priority date: 1984-12-20
Filing date: 1984-12-20
Publication date: 1986-07-09

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図は本考案の一実施例を示すも
ので、第１図は縦断面図、第２図は弁閉鎖動作時
における縦断面図であり、第３図及び第４図は本
考案の他の実施例をそれぞれ示し、第３図は弁開
放時の縦断面図、第４図は弁閉鎖時の縦断面図、
第５図〜第７図は従来例をそれぞれ示し、第５図
は構造を説明するための断面図、第６図は弁開放
時の縦断面図、第７図は弁閉鎖時の縦断面図であ
る。１…弁箱、２…弁座、３…シリンダ、４…弁ピ
ストン５…ピストン軸、６…スプリング、７…弁
体、８…上部ピストン室、９…下部ピストン室、
１０…上部給気パイロツト弁、１１…上部排気パ
イロツト弁、１２…下部給気パイロツト弁、１３
…下部排気パイロツト弁、１４…ダツシユポツト
、１５…ダンパーピストン、１６…シヤフト、２
１…弁箱、２２…シリンダ、２３…弁ピストン、
２４…ピストン軸、２５…弁体、２５…スプリン
グ、２７…弁座、２８…上部ピストン室、２９…
部ピストン室、３０…上部給気パイロツト弁、３
１…下部給気パイロツト弁、３２…上部排気パイ
ロツト弁、３３…下部排気パイロツト弁。 1 and 2 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a longitudinal sectional view during valve closing operation, and FIGS. 3 and 4 are longitudinal sectional views. Other embodiments of the present invention are shown, FIG. 3 is a longitudinal sectional view when the valve is open, FIG. 4 is a longitudinal sectional view when the valve is closed,
Figures 5 to 7 show conventional examples, with Figure 5 being a sectional view for explaining the structure, Figure 6 being a longitudinal sectional view when the valve is open, and Figure 7 being a longitudinal sectional view when the valve is closed. It is. DESCRIPTION OF SYMBOLS 1... Valve box, 2... Valve seat, 3... Cylinder, 4... Valve piston 5... Piston shaft, 6... Spring, 7... Valve body, 8... Upper piston chamber, 9... Lower piston chamber,
10... Upper air supply pilot valve, 11... Upper exhaust pilot valve, 12... Lower air supply pilot valve, 13
...lower exhaust pilot valve, 14...dash pot, 15...damper piston, 16...shaft, 2
1...Valve box, 22...Cylinder, 23...Valve piston,
24...Piston shaft, 25...Valve body, 25...Spring, 27...Valve seat, 28...Upper piston chamber, 29...
Upper piston chamber, 30... Upper air supply pilot valve, 3
1...Lower air supply pilot valve, 32...Upper exhaust pilot valve, 33...Lower exhaust pilot valve.

Claims

【実用新案登録請求の範囲】[Scope of utility model registration request]

弁座を有する弁箱に連設したシリンダ内に弁ピ
ストンを配置し、この弁ピストンのピストン軸に
内挿したスプリングにてピストン軸先端の弁体を
弁座に圧止させるようにすると共に、上記シリン
ダ内における弁ピストン上下の上下部ピストン室
内へ上記弁箱内で流動する流体の一部をそれぞれ
導く管路の途中に設けた上下部給気パイロツト弁
と、弁ピストン上下の流体をそれぞれ排気する管
路の途中に設けた上下部排気パイロツト弁とを備
えた開閉弁において、粘性流体が充填されている
ダツシユポツトを上記シリンダ外に配設し、この
ダツシユポツト内に配置したダンパーピストンを
、シヤフトを介して上記弁ピストンに連結したこ
とを特徴とする開閉弁の速度制御装置。 A valve piston is disposed in a cylinder connected to a valve box having a valve seat, and a spring inserted in the piston shaft of the valve piston causes the valve body at the tip of the piston shaft to be pressed against the valve seat, Upper and lower air supply pilot valves are installed in the middle of pipes that guide part of the fluid flowing in the valve box into the upper and lower piston chambers of the upper and lower parts of the valve piston in the cylinder, and exhaust the fluid above and below the valve piston, respectively. In the on-off valve equipped with upper and lower exhaust pilot valves provided in the middle of the pipe line, a dart pot filled with viscous fluid is disposed outside the cylinder, and a damper piston disposed inside the dart pot is connected to the shaft. A speed control device for an on-off valve, characterized in that it is connected to the valve piston via a valve piston.