JPS63101377U

JPS63101377U -

Info

Publication number: JPS63101377U
Application number: JP19664086U
Authority: JP
Priority date: 1986-12-19
Filing date: 1986-12-19
Publication date: 1988-07-01
Also published as: JPH0325464Y2

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例を示す要部の断面
図、第２図は従来例と本考案の一実施例を示す回
路図、第３図は従来、例を示す要部の断面図。Ｂ，Ｒ……流路、１１……主弁座、１２……主
パイロツト弁体、１６……作用室、３０……パイ
ロツト弁、４８……第一弁室、４９……パイロツ
ト弁座、５０……パイロツトポペツト弁体、５２
……流出口、５５……操作弁体、５６……第二弁
室、５７……操作室、５８……弁部、６０……第
一ばね、６２……第二ばね。 Fig. 1 is a sectional view of the main parts showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing a conventional example and an embodiment of the present invention, and Fig. 3 is a sectional view of the main parts showing the conventional example. figure. B, R...flow path, 11...main valve seat, 12...main pilot valve body, 16...action chamber, 30...pilot valve, 48...first valve chamber, 49...pilot valve seat, 50...Pilot poppet valve body, 52
... Outlet, 55 ... Operation valve body, 56 ... Second valve chamber, 57 ... Operation chamber, 58 ... Valve section, 60 ... First spring, 62 ... Second spring.

Claims

[Scope of utility model registration request]

A main poppet valve body that has two flow paths connected via a main valve seat, a tapered valve portion that seats on the main valve seat, and opens and closes the main valve seat by movement; The main valve seat is provided with an action chamber that applies hydraulic pressure to close the main valve seat, and a pilot valve that communicates the action chamber with the reservoir when the main poppet valve body is moved in the direction of opening the main valve seat. A movable valve having a first valve chamber connected to the action chamber through an inlet, a second valve chamber connected to the first valve chamber through a pilot valve seat, and a tapered valve portion seated on the pilot valve seat. a pilot poppet valve element that opens and closes the pilot valve seat by means of a first spring that presses the pilot poppet valve element in a direction to close the pilot valve seat; an outlet that connects to a storage tank when moved in one direction; an operating valve element that closes the space between the valve chambers and opens between the outlet and the second valve chamber when moved in the other direction, and presses the pilot poppet valve element in a direction to open the pilot valve seat by contacting the pilot poppet valve element; , a liquid control valve that is provided with a second spring that presses the operating valve element in one direction and an operating chamber that applies hydraulic pressure to the operating valve element to move it to the other side.