Adjustable flexible cut-off device

Abstract

The invention discloses an adjustable flexible cut-off device which comprises a shell and a rubber sleeve. A circulating channel penetrating axis of the rubber sleeve is arranged in the rubber sleeve,the shell is arranged out of the rubber sleeve in a sleeving manner, a rubber liner comprises a deformable part and a non-deformable part, an inflatable cavity is formed between the inner wall of theshell and the outer wall of the rubber sleeve, an access hole is formed in the shell, and the access hole communicates to the inflatable cavity; when the inflatable cavity is filled with a medium, the deformable part of the rubber sleeve deforms toward the side of the non-deformable part, and the circulating channel becomes small till being cut off. In the cut-off state of the circulating channel, the inner wall of the deformable part of the rubber sleeve is tightly attached to the inner wall of the non-deformable part. The adjustable flexible cut-off device can control the cut-off height, and is simple in structure and wide in application range.

Description

technical field [0001] The invention relates to the technical field of drainage systems, in particular to an adjustable flexible shut-off device. Background technique [0002] The application number is CN200820044904.4, the Chinese patent titled a pneumatic pipe clamp valve discloses a pneumatic pipe clamp valve, which includes a valve body and a pipe clamp rubber tube. The valve body is provided with an air inlet, and the valve body passes through the upper and lower The flange fixes the pipe clamp rubber tube in the valve body, and an inflatable cavity is formed between the pipe clamp rubber tube and the valve body. When the inflatable cavity is inflated, the pipe clamp valve is closed, the inflatable cavity is deflated, and the pipe clamp valve is opened. At present, the small-diameter pipe clamp rubber tube can realize two-point deformation closure under air pressure, and the large-diameter (DN400 or more) pipe clamp rubber tube can realize three-point or four-point defo...

AI Technical Summary

Problems solved by technology

Although the opening of the pneumatic pinch valve can be controlled by controlling the pressure, the relationship between the cross-sectional size of the pipe and the pressure is difficult to calculate and control the opening because the entire rubber tube of the clamp is in a state of deformation under the action of air pressure. Also can not control the interception height, therefore, the pneumatic pipe pinch valve of prior art is mostly used in the water supply system

[0003] Closure control or anti-backflow is required at the diversion wells, outlets, inlets of storage tanks, and sewage interceptors of the drainage system. Therefore, the above-mentioned pneumatic pipe valves are difficult to apply in the drainage system

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