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Vacuum butterfly valve

A butterfly valve and vacuum technology, applied in the field of vacuum butterfly valves, can solve the problem of high sealing requirements

Inactive Publication Date: 2008-09-17
JIANGNAN VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since the butterfly valve works when the pressure in the pipeline is lower than the atmospheric pressure, it requires higher sealing performance.

Method used

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  • Vacuum butterfly valve
  • Vacuum butterfly valve
  • Vacuum butterfly valve

Examples

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Embodiment Construction

[0011] Such as figure 1 As shown, the vacuum butterfly valve of the present invention includes a valve body 1, on which a valve seat 2 is arranged, a butterfly plate 3 is installed on a valve stem 4, and the valve stem 4 is rotatably passed through the valve A valve stem sleeve 5 on the body, driven by the valve stem 4, the butterfly plate 3 opens and closes on the valve seat 2, and the contact surface between the butterfly plate 3 and the valve seat 2 is provided with a T-shaped The sealing ring 6 is characterized in that the T-shaped sealing ring is provided with a plurality of protrusions 61 on the surface in contact with the valve seat. The T-shaped sealing ring is made of rubber material, and these protrusions 61 form multiple seals, which obviously improves the sealing performance between the butterfly plate and the valve seat.

[0012] In the present invention, a V-shaped packing 7 is provided between the valve stem 4 and the valve body 1, and the V-shaped packing 7 is...

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Abstract

This invention relates to one vacuum butterfly valve, which comprises valve parts with valve socket, wherein, one butterfly board is fixed on one valve bar moving through one valve bar cover; the said valve bar driving, the butterfly board switches on socket with several T shape sealing rings on contact surface; it is characterized by setting several protruding blocks between T shape sealing ring and valve socket sealing surface.

Description

[0001] This application claims the priority of the No. 200520044668.2 utility model patent application named "Vacuum Butterfly Valve" submitted to the Chinese Patent Office on August 31, 2005. technical field [0002] The invention relates to a vacuum butterfly valve. Background technique [0003] Vacuum butterfly valves are used in electric power and other industries, especially on vacuum pipelines where the medium in the pipeline is steam or air, for flow or cut-off. In the existing vacuum butterfly valve, a sealing ring with a "T" section is used between the butterfly plate and the valve seat to adapt to the working conditions of high-speed steam medium, and the best sealing and operation effect can be obtained by adjusting the compression degree of the sealing ring. The sealing ring is made of special rubber, which has high temperature resistance, good aging resistance and long service life. [0004] However, since the butterfly valve works when the pressure in the pipe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/22F16K1/226F16K41/02F16K49/00
Inventor 黄作兴
Owner JIANGNAN VALVE