Hard sealed butterfly valve

A hard seal and butterfly valve technology, applied in the field of nuclear secondary hard seal butterfly valves, can solve the problems of misalignment between the butterfly plate and the valve seat, fluid leakage, etc., and achieve the effect of avoiding severe friction and ensuring sealing performance

Inactive Publication Date: 2016-11-23
NEWAY VALVE SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the situation that the butterfly plate and the valve seat are misaligned due to machining errors in the prior art, and the sealing surface between the butterfly plate and the valve seat is tight at one end and loose at the other end. Defects that allow fluid to leak from the looser side of the sealing surface

Method used

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  • Hard sealed butterfly valve

Examples

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Embodiment 1

[0069] This embodiment provides a hard-sealed butterfly valve, including:

[0070] A valve body 1, a valve body channel is formed inside the valve body 1;

[0071] A valve stem 3, one end of which extends into the passage of the valve body;

[0072] The butterfly plate 2 is connected to the valve stem 3 and is located in the passage of the valve body;

[0073] The valve seat pressure ring 5 is connected to the valve body 1 and has a first gap;

[0074] The first accommodating space 51 is formed between the valve body 1 and the first gap of the valve seat pressure ring 5;

[0075] The valve seat 4 is radially movably arranged in the first accommodating space 51 and is located between the valve seat pressure ring 5 and the butterfly plate 2 .

[0076] The valve seat 4 itself is in the shape of a ring. When the butterfly valve is closed, the butterfly plate 2 squeezes and leans against the valve seat 4. If the butterfly plate 2 and the valve seat 4 cannot fit tightly, there mu...

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Abstract

The invention provides a hard sealed butterfly valve. A valve seat is ring-shaped, when the butterfly valve is closed, a disc extrudes and is attached to the valve seat, conditions that one end of the valve seat is clamped with the disc too tightly and the other end of the valve seat is clamped with the disc too loosely definitely occur if the disc cannot be tightly attached to the valve seat, and the valve seat is arranged in first accommodating space in a radially movable manner, so that at the moment, the valve seat on the side clamped too tightly moves far away from the disc in the radial direction and the valve seat on the side clamped too loosely moves close to the disc in the radial direction. The valve seat is enabled to move to the periphery of the disc accurately, so that the ring-shaped valve seat surrounds the circumference of the disc, and airtightness of the whole butterfly valve is guaranteed.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a nuclear secondary hard-sealed butterfly valve. Background technique [0002] At present, nuclear power, as one of the cleanest energy sources, is more and more favored by various countries. Butterfly valves are widely used as valves commonly used in nuclear power plants. Most of the butterfly valves in the prior art adopt a soft seal structure. The soft seal structure means that the two sides of the sealing pair are made of metal materials, and the other side is made of elastic non-metallic materials. This kind of seal has good sealing performance, but non-metallic materials are not resistant to high temperature, easy to wear, and have poor mechanical properties. Application of sealed butterfly valve in nuclear power plant. [0003] In order to solve the above problems, a hard-sealed butterfly valve emerged as the times require. A double-eccentric metal hard-sealed butterfly v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/226F16K1/42F16K41/02F16K37/00
CPCF16K1/226F16K1/2268F16K1/42F16K37/00F16K37/0016
Inventor 姜菲菲魏宏璞吕建东戴健
Owner NEWAY VALVE SUZHOU
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