JPH01131078U

JPH01131078U -

Info

Publication number: JPH01131078U
Application number: JP2840688U
Authority: JP
Priority date: 1988-03-03
Filing date: 1988-03-03
Publication date: 1989-09-06

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の要部構成説明図、
第２図は従来より一般に使用されている従来例の
構成説明図である。１…管路、３１…開閉弁本体、３２…ピストン
シヤフト、３３…ピストン、３４…シリンダー、
３５…第一室、３６…第二室、４１…第一パイプ
、４２…第二パイプ、４３…第三パイプ、４４…
第四パイプ、５…電磁弁。 FIG. 1 is an explanatory diagram of the main part configuration of an embodiment of the present invention,
FIG. 2 is a diagram illustrating the configuration of a conventional example that has been commonly used. DESCRIPTION OF SYMBOLS 1...Pipe line, 31...Opening/closing valve main body, 32...Piston shaft, 33...Piston, 34...Cylinder,
35...first chamber, 36...second chamber, 41...first pipe, 42...second pipe, 43...third pipe, 44...
Fourth pipe, 5... Solenoid valve.

Claims

[Claim for Utility Model Registration] An on-off valve that opens and closes a pipe through which a measuring fluid flows, comprising: an on-off valve body that is installed in the pipe and opens and closes the pipe; a piston shaft that has one end attached to the on-off valve body; , a piston attached to the other end of the piston shaft, a cylinder on which the piston slides, a first chamber on the on-off valve main body side constituted by the cylinder and the piston, and a first chamber opposite to the on-off valve main body. a first pipe having one end connected to a conduit on the upstream side of the on-off valve main body, a second pipe having one end connected to a conduit on the downstream side of the on-off valve main body; a third pipe having one end connected to the first chamber; a fourth pipe having one end connected to the second chamber; When the first pipe and the fourth pipe are in communication with each other and the second pipe and the fourth pipe are in communication with each other to press the piston toward the side opposite to the on-off valve main body, the first pipe and the fourth pipe are in communication with each other, and the second pipe and the fourth pipe are in communication with each other. A self-acting on-off valve comprising a solenoid valve that communicates a second pipe with the third pipe.