Marine center type multi-layer hard seal butterfly valve

A hard seal, marine technology, applied in the direction of shaft seal, lift valve, valve details, etc., can solve the problems of short service life, easy leakage, poor sealing performance of sealing ring, etc., and achieve long service life, small wear and good sealing performance Effect

Active Publication Date: 2016-05-18
YUEQING CITY VALVE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to provide a butterfly valve that does not leak when it is closed, is easy to leak, has poor sealing performance, needs to be replaced frequently, and has a short service life. The circumferential sealing surface of the ring and the inner wall of the valve body have little wear, the sealing performance of the sealing ring is good, and the marine center type multi-layer hard seal butterfly valve has a long service life.

Method used

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  • Marine center type multi-layer hard seal butterfly valve
  • Marine center type multi-layer hard seal butterfly valve

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Embodiment one, such as Figure 1 to Figure 2 As shown, a marine center type multi-layer hard-sealed butterfly valve is used for marine and ocean-going ships, including a driving part 1, a valve body 4, a valve stem 2 and a disc plate 9. The driving part can be worm gear transmission, electric, pneumatic, etc. Mechanism, the valve stem passes through the valve body, the outer end of the valve stem is connected with the driving part, the disc plate is located in the valve body, one side of the disc plate is fixed on the valve stem with cylindrical pin 5, and the other side of the disc plate is fixedly connected with a sealing Ring 11, the sealing ring is pressed by the pressure plate 10 and fixed on the disc plate by screws. The inner wall of the valve is a conical inclined surface, the large end of the conical inclined surface faces the valve stem, and a layer of wear-resistant metal layer 8 with uniform thickness is welded on the inner wall of the valve. The circumfer...

Embodiment 2

[0016] Embodiment 2, the thickness of the metal sheet forming a sealing pair with the inner wall of the valve gradually increases from the side close to the valve stem to the side away from the valve stem. All the other structures and methods of use are the same as in Embodiment 1.

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PUM

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Abstract

The invention discloses a marine center type multilayer hard sealing butterfly valve comprising a drive portion, a valve body, a valve rod and a dish plate. The valve rod penetrates through the valve body, the outer end of the valve rod is connected with the drive portion, the dish plate is located in the valve body, one side of the dish plate is fixedly connected with the valve rod, the other side of the dish plate is fixedly connected with a sealing ring, the circumferential sealing surface of the sealing ring and the inner wall of the valve body are matched to form a sealing pair, and the sealing ring is formed by overlapping a plurality of sheet-shaped metal pieces. For two adjacent metal pieces, the outer ring of one metal piece and the inner wall of the valve body are matched to form a sealing pair, and the outer diameter of the other metal piece is smaller than the inner diameter of the inner wall of the valve body. After the multiple metal pieces are overlapped, a plurality of rings of gaps surrounding in the circumferential direction are formed in the circumferential sealing surface of the sealing ring. When the butterfly valve is closed, leakage does not exist, abrasion to the circumferential sealing surface of the sealing ring and the inner wall of the valve body is little, the sealing performance of the sealing ring is good, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a marine butterfly valve. Background technique [0002] In the prior art marine butterfly valves, the seal between the disc plate and the inner wall of the valve mostly adopts rubber seals. The rubber seals are easy to wear and are easily corroded by the fluid medium, and have a short service life and need to be replaced frequently. A general hard-sealed butterfly valve includes a valve body, a valve stem and a disc plate. The circumferential sealing surface of the sealing ring on the disc plate cooperates with the inner wall of the valve body to form a sealing pair. The sealing ring and the inner wall of the valve body are both made of metal materials. When the disc plate is closed, the sealing ring produces elastic deformation, so that the circumferential sealing surface of the sealing ring is closely matched with the inner wall of the valve body, so as to achieve the sealing ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/226F16K1/46F16K27/02F16K41/02
CPCF16K1/224F16K1/2261F16K1/2268F16K27/0218
Inventor 倪岩土操守献
Owner YUEQING CITY VALVE FACTORY
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