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Inflatable butterfly valve

A butterfly valve and valve body technology, applied in the field of valve devices, can solve the problems of inconvenient processing, difficult control of sealing interference, large opening and closing torque, etc., and achieve the effects of convenient processing, easy size assurance, and zero driving torque switch

Inactive Publication Date: 2010-03-17
JIANGSU SHENTONG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the existing rubber-lined butterfly valve body, such as inconvenient processing, difficult control of sealing interference, and large opening and closing torque, the present invention provides a butterfly valve without opening and closing torque.

Method used

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  • Inflatable butterfly valve
  • Inflatable butterfly valve

Examples

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Embodiment Construction

[0011] like figure 1 As shown, an inflatable butterfly valve includes a valve body 1, a rubber valve seat 3, and a butterfly plate 4. The rubber valve seat 3 is installed in the valve body 1, and an air inlet 2 is opened on the valve body 1, which is connected with the valve body 1 and the rubber The air bag formed between the valve seats 3 communicates.

[0012] The contact surface between the valve body 1 and the rubber valve seat 3 is a plane, the end face of the air bag formed by the rubber valve seat 3 and the valve body 1 is an arc surface, and the inner hole size of the rubber valve seat 3 is equal to the inner hole of the mating flange 5 size. Action principle: When the valve is closed in place with the butterfly plate 4, the compressed air is sucked in from the air intake hole 2, and the rubber valve seat 3 expands and deforms, forming a seal with the butterfly plate 4. When the valve is opened, the air is exhausted from the air inlet hole 2 first, so that the rubbe...

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PUM

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Abstract

The invention provides an inflatable butterfly valve, which comprises a valve body, a rubber valve seat and a butterfly plate, wherein the rubber valve seat is arranged in the valve body; the valve body is provided with an air inlet communicated with an air bag formed between the valve body and the rubber valve seat; a contact surface between the valve body and the rubber valve seat is a plane; the end face of the air bag formed between the rubber valve seat and the valve body is in a circular arc shape; and the size of an inner bore of the rubber valve seat is equal to that of an inner bore of a matching flange. The inflatable butterfly valve has the advantages that a certain gap is reserved among seal pairs in the process of opening and closing the valve to open and close the valve in the way of zero driving torque; the valve seat is in plane contact with the valve body; and the processing is convenient and time-saving, and the size is easy to guarantee.

Description

technical field [0001] The invention relates to a valve device, in particular to a rubber-lined butterfly valve. Background technique [0002] At present, the rubber-lined butterfly valves used in various industries are sealed by the extrusion deformation between the rubber valve seat and the butterfly plate. The sealing interference is difficult to control, and the opening and closing torque is large. In addition, the rubber valve seat is installed on the valve body In the wedge-shaped groove, it is inconvenient to process. Contents of the invention [0003] In order to overcome the disadvantages of inconvenient processing of the valve body of the existing rubber-lined butterfly valve, difficulty in controlling the amount of sealing interference, and large opening and closing torque, the present invention provides a butterfly valve without opening and closing torque. [0004] The technical solution adopted by the present invention to solve the technical problem is an inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/228F16K27/02F16K1/42
Inventor 张逸芳陆平
Owner JIANGSU SHENTONG VALVE