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Bidirectional sealing butterfly valve

A two-way sealing and butterfly valve technology, applied in the direction of lift valves, valve devices, engine components, etc., can solve the problems of poor reverse pressure bearing capacity and easy leakage, and achieve reliable reverse sealing effects

Inactive Publication Date: 2013-04-17
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 shortcomings of existing hard-sealed butterfly valves that can only withstand positive pressure, poor reverse pressure bearing capacity, and easy leakage, the present invention provides a two-way sealed butterfly valve

Method used

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  • Bidirectional sealing butterfly valve

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Embodiment Construction

[0009] Such as figure 1 As shown, a two-way sealed butterfly valve includes a valve body 1, a valve seat 2, a sealing ring 4, a butterfly plate 12, and a pressure plate 3. The valve seat 2 is fixed in the valve body 1, and the sealing ring 4 forms a sealing pair with the valve seat 2. There is also a sealing ring seat 6 installed between the sealing ring 4 and the butterfly plate 12, and one end of the sealing ring seat 6 has a counterbore, which is connected to the butterfly plate 12 by screws 9, and there is also a sealing ring seat 6 and the butterfly plate 12. The spring 8 is installed, and the spring 8 is set on the screw 9. The side of the sealing ring seat 6 and the butterfly plate 12 are sealed by an O-ring 7. There is a gap between the sealing ring seat 6 and the plane of the butterfly plate 12. The sealing ring 4 passes through The pressure plate 3 is fixed on the sealing ring seat 6, the gasket 5 is installed between the sealing ring 4 and the sealing ring seat 6, a...

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Abstract

The invention provides a bidirectional sealing butterfly valve which comprises a valve body, a valve base, a sealing ring, a butterfly plate and a pressing plate. The valve base is fixed in the valve body, the sealing ring and the valve base form a sealing pair, a sealing ring base is further installed between the sealing ring and the butterfly plate, and a round of counter bores are arranged at one end of the sealing ring base and connected onto the butterfly plate through screw; a spring is further installed between the sealing ring base and the butterfly plate and sleeved on a screw, the lateral surface of the sealing ring base is sealed with the butterfly plate through an O-shaped ring, a gap is reserved between the sealing ring base and a plane of the butterfly plate, and the sealing ring is fixed on the sealing ring base through the pressing plate; a gasket is installed between the sealing ring and the sealing ring base, a gasket is installed between the pressing plate and the sealing ring base, a plurality of pressure balancing holes are further arranged at the position of a cavity formed by the butterfly plate on the pressing plate, and a disc spring is further installed between the screw and the counter bores of the sealing ring base. The bidirectional sealing butterfly valve has the advantages of being reliable in valve reverse sealing and long in service life.

Description

technical field [0001] The invention relates to a valve device, in particular to a bidirectional sealing butterfly valve. Background technique [0002] At present, the hard-sealed butterfly valve commonly used in gas pipelines in the metallurgical industry has a metal sealing ring fixed on the butterfly plate through a pressure plate and forms a sealing pair with the valve seat on the valve body. Generally, it can only bear positive pressure and has poor reverse pressure bearing capacity. , once the medium in the system has a reverse bearing requirement, it will easily cause leakage of the valve and affect the safety of the environment and personnel. Contents of the invention [0003] In order to overcome the shortcomings of existing hard-sealed butterfly valves that can only bear positive pressure, have poor reverse pressure bearing capacity and are easy to leak, the present invention provides a two-way sealed butterfly valve. [0004] The technical solution adopted by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/228
Inventor 黄高杨沈捷美
Owner JIANGSU SHENTONG VALVE
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