JPS6391705U

JPS6391705U -

Info

Publication number: JPS6391705U
Application number: JP18615886U
Authority: JP
Priority date: 1986-12-04
Filing date: 1986-12-04
Publication date: 1988-06-14

Description

[Brief explanation of drawings]

第１図は従来のサーボ弁の断面図、第２図は従
来のロジツク弁の断面図、第３図は第１図示のも
ののスプール形のポート切換部分の説明図、第４
図は第３図示のものの特性図、第５図は本考案の
実施例の截断側面図である。１……ロジツク弁、３……ブツシユ、４……シ
ート部、５……ばね、６……ポペツト、７……流
入口、８……流出口、９……シリンダ、１０……
ピストン、１１，１２……ロツド、１３……パイ
ロツト回路、１４……位置検出器、１５……電磁
制御弁。 Fig. 1 is a sectional view of a conventional servo valve, Fig. 2 is a sectional view of a conventional logic valve, Fig. 3 is an explanatory diagram of the spool-type port switching part of the one shown in Fig. 1, and Fig. 4 is a sectional view of a conventional servo valve.
The figure is a characteristic diagram of the one shown in Figure 3, and Figure 5 is a cutaway side view of the embodiment of the present invention. 1... Logic valve, 3... Bush, 4... Seat part, 5... Spring, 6... Poppet, 7... Inlet, 8... Outlet, 9... Cylinder, 10...
Piston, 11, 12... Rod, 13... Pilot circuit, 14... Position detector, 15... Solenoid control valve.

Claims

[Scope of utility model registration request]

A logic valve is provided with a poppet that is movable from the seat of the bush against a spring in a cylindrical bush, and controls the flow from an inlet at the tip of the bush to an outlet on the side thereof by movement of the poppet. , a double rod-shaped cylinder is attached with one rod on the spring side of the poppet, and a pilot circuit is provided to guide the pressure of the inlet to act on the end face of the other rod of the cylinder and the spring side face of the poppet. ,
The valve is characterized by being provided with an electromagnetic control valve which receives a signal from a position detector provided to detect the moving distance of the rod of the cylinder and controls the action of pressure from an external pilot pressure source on the piston of the cylinder. A poppet type 2-port servo valve for large flow rates.