Full-metal elastic arc lip sealing ring for hard seal butterfly valve

An all-metal, hard-sealing technology, applied in lift valves, valve devices, engine components, etc., can solve the problems of medium scouring loss and difficult to guarantee sealing performance, and achieve the effect of avoiding scouring loss, increasing sealing force, and good elasticity.

Pending Publication Date: 2019-11-15
SUFA TECH IND CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are also obvious. The flexible graphite is easy to be washed and lost by the medium during operation, making it difficult to guarantee the sealing performance.

Method used

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  • Full-metal elastic arc lip sealing ring for hard seal butterfly valve
  • Full-metal elastic arc lip sealing ring for hard seal butterfly valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Below in conjunction with accompanying drawing, the application is further described:

[0014] As shown in the attached figure, an all-metal elastic sealing ring for a hard-sealed butterfly valve is provided with a gasket on both sides of the elastic arc lip sealing ring, which is fixed on the butterfly plate by a pressure plate and screws, and the sealing ring protrudes in an arc shape. The thickness of the elastic lip is 3mm-5mm, and the arc of the elastic lip extends toward the large end of the sealing tapered surface of the valve seat.

[0015] Realize that technical characteristic of the present invention has:

[0016] 1. Overall all-metal structure

[0017] The overall all-metal material is adopted, and the flexible graphite interlayer is canceled to avoid the erosion and loss of the flexible graphite by the pipeline medium.

[0018] 2. Elastic arc lip sealing ring

[0019] The sealing ring protrudes an arc-shaped elastic lip, the thickness of the elastic lip i...

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PUM

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Abstract

The invention belongs to sealing structures, and particularly relates to a full-metal elastic sealing ring for a hard seal butterfly valve. The full-metal elastic sealing ring for the hard seal butterfly valve comprises a valve body, a valve rod is arranged in an inner cavity of the valve body and is fixed in the valve body through a butterfly plate, and an elastic arc sealing ring body makes contact with the inner wall of a valve seat sealing surface of the valve body. The full-metal elastic sealing ring has the beneficial effects that the overall full-metal sealing ring body is adopted, a flexible graphite interlayer is removed, and therefore the erosion and loss of a pipeline medium to flexible graphite are avoided; the sealing ring body extends out to form an arc-shaped elastic lip, the thickness of the elastic lip is 3-5 mm, so that the sealing ring has good elasticity, and good sealing performance is easily achieved; and the arc of the elastic lip extends in the direction towardsa big end of the valve seat sealing conical surface, so that the medium pressure can act on the inner side of the arc of the elastic lip, the sealing force is increased by utilizing the medium pressure, and the sealing effect can be enhanced.

Description

technical field [0001] The invention belongs to a sealing structure, in particular to an all-metal elastic sealing ring for a hard sealing butterfly valve. Background technique [0002] Triple eccentric hard seal butterfly valve in double eccentric (see figure 1 On the basis of A and B) in the center line of the valve seat and the center line of the valve body are inclined to form an eccentric angle (see figure 1 C) in C), and cooperate with a corresponding geometric shape design on the sealing surface of the valve disc, so that there is no friction between the sealing ring and the valve seat during the 90° switch rotation stroke of the valve disc. After the valve is closed, the valve stem will The torque creates a sealing specific pressure between the sealing ring and the valve seat, thus ensuring that the valve is tightly closed. During the opening process of the triple eccentric butterfly valve at 0°-90°, the sealing ring will break away from the sealing surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K1/36
CPCF16K1/226F16K1/2261
Inventor 李军业彭新英吴辉
Owner SUFA TECH IND CNNC
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