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Metal seal three-eccentric center butterfly valve

A technology of triple eccentric butterfly valve and metal seal, which is applied in the direction of lift valve, valve device, engine components, etc., can solve the problem of poor sealing effect of metal seal triple eccentric butterfly valve, achieve good elastic contact sealing effect, and ensure the effect of sealing effect

Active Publication Date: 2020-04-21
KCM VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a metal-sealed triple-eccentric butterfly valve, which solves the problem of poor sealing effect of the existing metal-sealed triple-eccentric butterfly valve

Method used

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  • Metal seal three-eccentric center butterfly valve
  • Metal seal three-eccentric center butterfly valve

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Effect test

Embodiment Construction

[0015] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0016] As shown in the figure, a metal-sealed triple-eccentric butterfly valve includes a valve body 1, a butterfly plate assembly 2, and a valve stem 3. The valve body 1 is provided with a valve seat sealing surface 11 near the outlet end. The butterfly plate assembly 2 Set in the valve body 1, it includes a butterfly plate 4, a metal sealing ring 5, and a stopper 6. The butterfly plate 4 is connected to the valve stem 3 and can rotate with the valve stem 3. One end surface of the butterfly plate 4 A mounting boss 41 is formed, and the metal sealing ring 5 is sleeved outside the mounting boss 41. The end surface of the mounting boss 41 is provided with a limiting boss 42, and the limiting member 6 is a limiting ring. The limiting member 6 is sleeved on the limiting boss 42, and is fixedly connected with the butterfly plate 4 by bolts. The limiting member 6 ...

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Abstract

The invention discloses a metal seal three-eccentric center butterfly valve. The valve is characterized in that the inner diameter of a metal seal ring is larger than the diameter of a mounting boss,a floating space is formed between the metal seal ring and the mounting boss, two end faces of the metal seal ring are in sliding seal fit with a butterfly plate and a limiting part, and multiple through holes are formed in the limiting part, and communicate with the floating space. The butterfly valve has the advantages that due to the floating space, the metal seal ring can slightly move and elastically deform in the radial direction, the floating space can better adapt to a valve base seal face, when the floating space is in seal fit with the valve base seal face, the better seal effect isachieved, meanwhile, a medium can pass through a through hole to enter the floating space, medium pressure is provided for the metal seal ring, the self seal effect is achieved, the seal effect of thespace and the valve base seal face can be further ensured, dual-way seal is achieved, and no leakage exists.

Description

technical field [0001] The invention relates to a butterfly valve, in particular to a metal-sealed triple-eccentric butterfly valve. Background technique [0002] Butterfly valve is also called flap valve. Its opening and closing part is butterfly plate, which rotates around the valve stem to achieve the purpose of opening and closing. Triple eccentric butterfly valve means that the axis of the valve stem deviates from the center of the butterfly plate and the center of the body at the same time, and the valve seat rotates. A butterfly valve with a certain angle between the axis and the channel axis of the valve body. [0003] At present, metal-sealed triple-eccentric butterfly valves are usually equipped with a metal sealing ring on the butterfly plate, and the sealing is realized through the metal sealing ring and the sealing surface of the valve seat. However, the existing metal sealing ring is usually directly fixed and pressed on the butterfly plate. The sealing effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K1/228F16K1/36F16K1/46
CPCF16K1/228F16K1/36F16K1/2261F16K1/46
Inventor 张延斌戴温炜程红晖吴业飞章成选王章章王靖华钱长兴林函才项炳弟廖永照孙冬萍
Owner KCM VALVE
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