JPH0386263U

JPH0386263U -

Info

Publication number: JPH0386263U
Application number: JP14773589U
Authority: JP
Priority date: 1989-12-25
Filing date: 1989-12-25
Publication date: 1991-08-30

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例による弁開閉駆動
装置の構成図、第２図は従来の弁開閉駆動装置の
構成図、第３図は従来のサーボ弁の断面図である
。図において、２は弁デイスク、４はピストン、
５はばね、６は可動シリンダ、７は伝動ねじ軸、
８はナツト、１０は支持柱、１４はモータ、１６
はエンコーダ、２０は電磁弁、２１はアキユムレ
ータ、２６は油圧源装置である。 FIG. 1 is a block diagram of a valve opening/closing drive device according to an embodiment of this invention, FIG. 2 is a block diagram of a conventional valve opening/closing drive device, and FIG. 3 is a sectional view of a conventional servo valve. In the figure, 2 is a valve disk, 4 is a piston,
5 is a spring, 6 is a movable cylinder, 7 is a transmission screw shaft,
8 is a nut, 10 is a support column, 14 is a motor, 16
20 is an encoder, 20 is a solenoid valve, 21 is an accumulator, and 26 is a hydraulic power source device.

Claims

[Scope of utility model registration request]

A piston connected to a valve disk, a movable cylinder that accommodates the piston and is supported movably in the valve opening/closing direction, and normally pressurizes the valve opening direction chamber of the movable cylinder, and in an abnormality etc., pressurizes the valve opening direction chamber. a fluid pressure device configured to depressurize the
a valve closing means for moving the piston in the movable cylinder in the valve closing direction in the event of an abnormality, and a transmission screw shaft having an axis line parallel to the valve opening/closing direction;
A valve opening/closing drive device comprising a nut screwed onto the transmission screw shaft and fixed to the movable cylinder, and a drive device and a control device that rotationally drive the transmission screw shaft.