JPS6299665U

JPS6299665U -

Info

Publication number: JPS6299665U
Application number: JP19195385U
Authority: JP
Priority date: 1985-12-12
Filing date: 1985-12-12
Publication date: 1987-06-25
Also published as: JPH027985Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す給水状態の縦
断面図であり、第２図は同実施例の逆流時の縦断
面、第３図は同実施例の排水状態を示す縦断面で
あり、第４図は他の実施例の縦断面図である。１……弁箱、１〜１……流入口、１〜２……流
出口、１〜３……排水口、１〜４，１〜５，１〜
６，１〜７，……シリンダー内面、２……ピスト
ン状弁体、２〜５……連通口、３……ピン、４…
…伝達部材、５……パイプ。 Fig. 1 is a longitudinal cross-sectional view of the water supply state showing an embodiment of the present invention, Fig. 2 is a longitudinal cross-section of the same embodiment during backflow, and Fig. 3 is a longitudinal cross-section showing the water drainage state of the same embodiment. 4 is a longitudinal sectional view of another embodiment. 1... Valve box, 1-1... Inlet, 1-2... Outlet, 1-3... Drain port, 1-4, 1-5, 1-
6, 1-7, ... Cylinder inner surface, 2 ... Piston-shaped valve body, 2-5 ... Communication port, 3 ... Pin, 4 ...
...Transmission member, 5...pipe.

Claims

[Scope of utility model registration request]

A piston-shaped valve body that reciprocates within a cylinder formed in the valve box creates a flow path between the inlet and the outlet and between the outlet and the drain of the inlet, outlet, and drain opening on the side of the cylinder. In a drain valve that opens and shuts off to select between two states, a water supply state and a drain state, the piston-shaped valve body is configured such that, at least in the water supply state, pressure water acts on the piston-shaped valve body to apply a lifting force to the piston-shaped valve body. Negative pressure is created in the water supply pipe by forming the valve body at different levels, providing a communication hole passing through both ends, and connecting it to the power transmission member at one end so that it can move freely by an appropriate amount. When the piston-shaped valve body itself moves automatically to block the flow path between the inlet and the outlet, the device prevents the backflow of sewage from the end of the pipe or hot water from the water heater.