Metal seal triple eccentric butterfly valve

A triple eccentric butterfly valve and metal sealing technology, applied in lift valve, valve device, mechanical equipment and other directions, can solve the problem of poor sealing effect of metal sealing triple eccentric butterfly valve, achieve good elastic contact sealing effect, and ensure the sealing effect.

Active Publication Date: 2022-02-11
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 triple eccentric butterfly valve
  • Metal seal triple eccentric butterfly valve

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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

A metal-sealed triple-eccentric butterfly valve. It is characterized in that: the inner diameter of the metal sealing ring is larger than the diameter of the mounting boss, so that a floating space is formed between the metal sealing ring and the mounting boss, and the two ends of the metal sealing ring are slidingly sealed with the butterfly plate and the limit piece Cooperate; the limiting member is provided with a number of through holes, and the through holes communicate with the floating space. Its advantage is that the floating space enables the metal sealing ring to move slightly in the radial direction and deform elastically, so that it can better adapt to the sealing surface of the valve seat, and when it is sealed with the sealing surface of the valve seat, a better sealing effect is achieved. The medium can enter the floating space through the through hole, providing a medium pressure for the metal sealing ring to achieve a self-sealing effect, which not only further ensures the sealing effect between it and the sealing surface of the valve seat, but also realizes two-way sealing without leakage.

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 Patents(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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