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High-temperature double-piston fixing ball valve

A fixed ball valve and double-piston technology, applied to valve devices, cocks including cut-off devices, engine components, etc., can solve the problem that ball valves with double-piston functions cannot be used in high-temperature media, so as to solve high-temperature medium leakage and reduce elastic pressure , good sealing effect

Active Publication Date: 2014-04-16
NEWAY VALVE SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the existing ball valve with dual-piston function cannot be used for high-temperature medium, while the ball valve using graphite as the seal only has the function of single-piston. Therefore, the purpose of the present invention is to provide a High-temperature double-piston fixed ball valve, the seat structure has the function of double-piston, the sealing effect is good, and it can be used in high-temperature working conditions

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , a high-temperature double-piston fixed ball valve, which includes a valve seat 1 arranged between a valve cover 2 and a ball 6, the valve seat 1 is in sealing contact with the ball 6, and the valve seat 1 and the valve cover 2 Set the sealing assembly, the sealing assembly includes a sealing body 3, the sealing body 3 is a graphite sealing ring; of course, in other embodiments, it can also be made of other materials that are resistant to high temperatures and have certain deformation capabilities; 3 is an integral structure, which is annular and fills the radial gap between the valve seat 1 and the valve cover 2. The integral sealing assembly 3 is mainly suitable for ball valves with a small thickness of the sealing assembly. Both ends of the sealing body 3 are respectively provided with a first elastic member 41 and a second elastic member 42, and the sealing body 3, the first elastic member 41 and the second elastic member 42 are arranged along the valv...

Embodiment 2

[0038] Since the sealing body 3 is generally made of materials such as graphite that are resistant to high temperatures and have a certain deformability, the thicker the thickness, the greater the initial preload required for the first elastic member 41 and the second elastic member 42. Some ball valves require the sealing body 3 to have a relatively large thickness, which will cause the ball valve to be difficult to operate when it is closed or opened.

[0039] In order to solve this problem, the sealing body 3 in this embodiment includes a first sealing ring 31 and a second sealing ring 32 arranged radially, and the gap between the first sealing ring 31 and the second sealing ring 32 is There is a core ring 33 for separating the first sealing ring 31 from the second sealing ring 32; the first sealing ring 31 seals the gap between the core ring 33 and the valve cover 2 , the second sealing ring 32 seals the gap between the core ring 33 and the valve seat 1 .

[0040] Further...

other Embodiment approach

[0042] In other embodiments, the sealing member 3 can also choose more layers of sealing ring structure according to the situation, and the sealing rings of adjacent layers can be separated by the core ring. Those skilled in the art should understand that as long as the first elastic member and the second elastic member are arranged at both ends of the sealing member 3, and the inner and outer diameters of the sealing assembly and the distance between the inner and outer diameters of the valve seat and the sealing position of the ball are ensured, relationship, a ball valve with dual-piston functions can be obtained, and the above-mentioned structures all belong to the content to be protected by the present invention.

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Abstract

The invention discloses a high-temperature double-piston fixing ball valve which comprises a valve seat arranged between a valve deck and a ball. The valve seat is in sealed contact with the ball, a sealing assembly is arranged between the valve seat and the valve deck and comprises a sealing body, the two ends of the sealing body are provided with a first elastic piece and a second elastic piece respectively, one end of the first elastic piece abuts against the valve seat, the other end of the first elastic piece abuts against the sealing body, one end of the second elastic piece abuts against the valve deck, the other end of the second elastic piece abuts against the sealing body, the outer diameter of the sealing body is larger than the outer diameter of the position where the valve seat and the ball are sealed, and the inner diameter of the sealing body is smaller than the inner diameter of the position where the valve seat and the ball are sealed. According to the high-temperature double-piston fixing ball valve, the sealing assembly is used for sealing, meanwhile, the sealing assembly can achieve the bidirectional-sealing double-piston function, the sealing effect is good, the high-temperature double-piston fixing ball valve can be applied to the high-temperature working condition, and the problem of high-temperature medium leakage is effectively solved.

Description

technical field [0001] The invention relates to the technical field of ball valves, in particular to a high-temperature double-piston fixed ball valve. Background technique [0002] Ball valves are widely used to collect and discharge impurities such as coal slag and coal ash in coal chemical plants due to their advantages of small flow resistance, rapid opening and closing, and compact structure. The working conditions of the valve are relatively harsh, and the medium flowing through it is generally High temperature medium, so the valve is required to have good sealing performance. Among the existing ball valves, there are mainly single-piston ball valves and double-piston ball valves, and when the ball valve is closed, the valve seat of the double-piston ball valve is always pushed toward the ball regardless of the pressure in the cavity or the pressure in the pipeline. , so it has a better sealing effect. [0003] For example, Chinese patent document CN2032782845U discl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0663F16K5/201
Inventor 陈尚东韩金忠
Owner NEWAY VALVE SUZHOU
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