A four-eccentric butterfly valve and sealing ring

A sealing ring and four eccentric technology, applied in the direction of engine sealing, valve lift, valve device, etc., can solve the problems of large sealing surface wear, shortened service life, large valve leakage, etc., to ensure leakage and prolong service life Effect

Active Publication Date: 2017-02-08
SAMSON CONTROLS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problem that the sealing surface of the existing butterfly valve wears a lot at the short axis of the ellipse, and wears little at the long axis of the ellipse, resulting in increased valve leakage and shortened service life

Method used

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  • A four-eccentric butterfly valve and sealing ring
  • A four-eccentric butterfly valve and sealing ring
  • A four-eccentric butterfly valve and sealing ring

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Embodiment Construction

[0036] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0037] Such as Figure 4(a) , (b) and (c) are schematic structural diagrams of a four-eccentric butterfly valve according to an embodiment of the present invention. The four-eccentric butterfly valve includes a valve body 1, a valve seat 2, a valve stem 4, a disc plate 3 and a sealing Ring 5, the valve body has a valve channel 6, the valve seat 2 on the valve body is arranged on the outside of the valve channel 6, the disc plate 3 is arranged in the valve channel 6, and the disc plate 3 is installed with The sealing ring 5, the valve stem 4 is connected with the disc plate 3, and is used to drive the disc plate to rotate, so that the disc plate drives the sealing ring to contact the valve seat in a state, thereby closing the valve. The sealing ring is cl...

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Abstract

The invention provides a four-eccentric butterfly valve and a sealing ring. The butterfly valve comprises a valve rod, a dish plate, a valve body, a valve seat and a sealing ring, wherein a sealing surface is formed between the sealing ring and the valve seat when the valve is closed, the axis of the valve rod is not coincident with the sealing surface, and the axis of the valve rod does not intersect with the central line of a valve passage; the outer surface of the sealing ring is matched with the inner surface of the valve seat and is a part of the outer surface of an elliptic cone in space; the section of the sealing ring is a perfect circle or is approximate to a perfect circle, and when the valve is closed, the central line of the elliptic cone corresponding to the sealing ring is unparallel to the central line of the valve passage. The outer surface of the sealing ring of the butterfly valve provided by the invention is a part of the outer surface of the elliptic cone in space, and when the valve is closed, the section of the sealing surface formed by the sealing ring and the valve seat is a perfect circle or is approximate to a perfect circle, so that the pressure acting on the sealing ring is uniformly distributed on the sealing surface, and as a result, the service life of the product is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of butterfly valves, in particular to a four-eccentric butterfly valve and a sealing ring. Background technique [0002] In order to meet the requirements of various working conditions, butterfly valves have experienced the evolution from concentric butterfly valves to single eccentric butterfly valves, double eccentric butterfly valves and triple eccentric butterfly valves. [0003] 1. Concentric butterfly valve [0004] Such as figure 1 As shown, it is a structural diagram of a concentric butterfly valve, including a valve body 1, a valve seat 2, a disc plate 3, a valve stem 4 and a neutral section 51 of the sealing surface. The center of the plate and the center of the valve body (the center of the valve channel) are at the same position. The structure is simple and the manufacture is convenient. Common rubber-lined butterfly valves belong to this category. The disadvantage is that because the butterfly plate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/226F16K1/46F16K1/42F16J15/06
CPCF16K1/2261F16K1/427
Inventor 祁专陈伟刘军
Owner SAMSON CONTROLS CHINA
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