JPH0285085U

JPH0285085U -

Info

Publication number: JPH0285085U
Application number: JP16501788U
Authority: JP
Priority date: 1988-12-22
Filing date: 1988-12-22
Publication date: 1990-07-03

Description

[Brief explanation of drawings]

第１図Ａは、本考案の第１の実施例の全体構成
を示す縦断面図、同図Ｂは、同上実施例に使用さ
れるロツドのハウジング貫通部分を示す横断面図
、同図Ｃは、同じくパイロツト弁体周辺部の拡大
断面図、第２図Ａは前記第１の実施例の一部を変
更した第２の実施例の要部縦断面図、同図Ｂは、
同上実施例の要部横断面図、第３図Ａは、同じく
第３の実施例の要部縦断面図、同図Ｂは、同じく
要部横断面図、第４図は、同じく第４の実施例の
要部縦断面図である。１Ａ，５０Ａ……上流側流路、１Ｂ，５０Ｂ…
…下流側流路、２，５１……シリンダ、３，５２
……ピストン、３ａ，５７……主弁体、４，５８
……弁座、７，３７，４７……パイロツト弁体、
８……螺子部材、９……アーム部材、１０……第
２のバネ座金、１１……パイロツトスプリング、
２１……ロータ、２４……ロツド、２５……電磁
コイル、３７ａ……円弧溝、３８……アーム部材
、４７ａ……孔、４８……アーム部材、５３……
クツシヨンバネ、５５……連通管、５５ａ……連
通孔、５６……弁孔部材。 FIG. 1A is a vertical sectional view showing the overall structure of the first embodiment of the present invention, FIG. FIG. 2A is a longitudinal sectional view of a main part of a second embodiment, which is a partially modified version of the first embodiment, and FIG.
FIG. 3A is a cross-sectional view of the main part of the third embodiment, FIG. 3B is a cross-sectional view of the main part of the third embodiment, and FIG. FIG. 3 is a vertical cross-sectional view of main parts of the embodiment. 1A, 50A...upstream flow path, 1B, 50B...
...Downstream flow path, 2,51...Cylinder, 3,52
...Piston, 3a, 57...Main valve body, 4,58
... Valve seat, 7, 37, 47 ... Pilot valve body,
8... Screw member, 9... Arm member, 10... Second spring washer, 11... Pilot spring,
21... Rotor, 24... Rod, 25... Electromagnetic coil, 37a... Arc groove, 38... Arm member, 47a... Hole, 48... Arm member, 53...
Cushion spring, 55... communicating pipe, 55a... communicating hole, 56... valve hole member.

Claims

[Scope of utility model registration request]

a cylindrical piston that is slidably inserted into the cylinder; a main valve body that advances and retreats into the fluid flow path in conjunction with the sliding of the piston to vary the flow path opening area;
As the main valve body moves downstream, the valve seat on which it seats when fully closed and the cylindrical internal space of the piston are connected to the piston in a fluid flow path between the upstream side and the downstream side of the main valve body. A communication passage formed by communicating with the flow passage on the opposite side to the side communicating with the cylinder through a gap, and an opening end surface of the communication passage inserted into the cylindrical internal space so as to freely move forward and backward. a pilot valve body; and a valve-open holding elastic body that applies an elastic biasing force between the main valve body and the pilot valve body so that the communication passage is held in an open state when the main valve body is in an open position; A main valve body driving means for driving the main valve body in an opening/closing direction, and a pilot valve body driving means for driving a pilot valve body to open and close the communication passage when the main valve body is in a fully closed state; and an engagement means for freely engaging the pilot valve element with the drive shaft of the pilot valve element driving means in a direction substantially perpendicular to the axis, and the main valve element is positioned by the main valve element driving means to control the fluid flow. In addition to controlling the flow passage opening area, the pilot valve element driving means closes the communication passage after the main valve element seats on the valve seat during full open control, and closes the communication passage after the main valve element is seated on the valve seat during full open control, and closes the communication passage during valve open control. A flow control valve characterized in that a main valve body is opened after a communication passage is opened.