JPS647904U

JPS647904U -

Info

Publication number: JPS647904U
Application number: JP10228387U
Authority: JP
Priority date: 1987-07-04
Filing date: 1987-07-04
Publication date: 1989-01-17

Description

[Brief explanation of the drawing]

第１図は本実施例の断面説明図、第２図は従来
のダイヤフラムバルブの開閉装置を示す断面説明
図である。１……シリンダ、１ａ，１ｂ，１ｃ……階段部
、５，７……軸、８……シリンダヘツド、９……
凹部、１１，１２……仕切盤、１７……エルボ、
１８……中空部、１９……皿バネ、３１……ダイ
ヤフラムバルブ、３２……弁、３４……ダイヤフ
ラム。 FIG. 1 is an explanatory cross-sectional view of this embodiment, and FIG. 2 is an explanatory cross-sectional view showing a conventional diaphragm valve opening/closing device. 1... Cylinder, 1a, 1b, 1c... Stairs, 5, 7... Shaft, 8... Cylinder head, 9...
Recess, 11, 12... Partition board, 17... Elbow,
18...Hollow part, 19...Disc spring, 31...Diaphragm valve, 32...Valve, 34...Diaphragm.

Claims

[Scope of utility model registration request]

A plurality of pistons with different diameters are arranged in a row inside the cylinder, and the inside of the cylinder is divided into a plurality of chambers.One of the shafts protruding from the pistons at both ends protrudes outside the cylinder, and the other fits inside the cylinder. The inner wall of the cylinder is configured to be able to move forward and backward, while the inner wall of the cylinder is formed into a step-like shape so that it can slide into contact with each piston, and a partition panel that divides the chamber between the pistons into two chambers is slidably installed to allow air to flow in from outside the cylinder. A hollow part is provided in the piston and the shaft to allow the flow to flow into the chamber on the lower side of the piston, a spring for pressing the piston is installed in the cylinder, and the shaft protruding outside the cylinder presses the diaphragm of the diaphragm valve. A diaphragm valve opening/closing device characterized by pressing.