A New Bellows Sealed Ball Valve

A technology for sealing ball valves and bellows, applied in valve details, valve device, valve shell structure and other directions, can solve the problems of unusable, rubber sealing components not resistant to high temperature and low temperature, to extend service life and prevent torsion Invalidation, the effect of increasing operability

Active Publication Date: 2018-01-30
JIANGSU SHENTONG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the ball valves of the prior art, rubber elastic sealing elements are usually used to realize this function, but the rubber sealing elements are not resistant to high temperature and low temperature, and can only be realized at normal temperature, and cannot be used under high and low temperature conditions.

Method used

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  • A New Bellows Sealed Ball Valve
  • A New Bellows Sealed Ball Valve
  • A New Bellows Sealed Ball Valve

Examples

Experimental program
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Effect test

Embodiment Construction

[0028] Such as figure 1 , 2 , 3, a new type of bellows-sealed ball valve, including a valve body 3, a ball 6 is arranged in the inner cavity of the valve body 3, and a valve stem that is linked with the ball 6 and protrudes from the top of the valve body 3 is also arranged in the valve body 3 1. The valve stem 1 is supported and limited by the valve cover 2, and the valve seat assembly A4 and the valve seat assembly B5 are respectively arranged on both axial sides of the ball 6,

[0029] Both the valve seat assembly A4 and the valve seat assembly B5 include a valve seat body 7, on which a sealing ring 17 forming a sealing pair with the sphere 6 is arranged, and two bellows are set on the outer ring of the valve seat body 7 in sections , are respectively bellows I8 and bellows II9, the two bellows are respectively welded on both sides of the cage 10, the other end of the bellows I8 is welded to the stepped surface of the outer ring of the valve seat body 7, the other end of th...

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Abstract

The invention discloses a novel sealing ball valve with corrugated pipes. A valve seat assembly A and a valve seat assembly B are arranged on the two axial sides of a valve body respectively and respectively comprise a valve seat body, each valve seat body is provided with a sealing ring forming a sealing pair with a ball body, two corrugated pipes, namely the corrugated pipe I and the corrugated pipe II are installed on the outer ring of each valve seat body in a sectional mode and a sleeving mode and are welded to the two sides of a holder respectively, the other end of each corrugated pipe I is welded to the step surface on the outer ring of the corresponding valve seat body, the other end of each corrugated pipe II is welded to a valve seat check ring, the inner diameters of the corrugated pipe I and the corrugated pipe II of the valve seat assembly A are greater than the inner diameter of the sealing ring of the valve seat assembly A, the inner diameter of the corrugated pipe I of the valve seat assembly B is smaller than the inner diameter of the sealing ring of the valve seat assembly B, and the inner diameter of the corrugated pipe II of the valve seat assembly B is greater than the inner diameter of the sealing ring of the valve seat assembly B. The novel sealing ball valve has the beneficial effect of being applicable to severe working conditions, and valve seats on one side or both sides can realize the bidirectional sealing function.

Description

Technical field [0001] The invention relates to a ball valve, in particular to a ball valve sealed by a bellows. Background technique [0002] At present, ball valves have been widely used in pipeline systems. When the ball valve transports volatile and dangerous liquid media, due to the increase in temperature, the middle chamber of the valve body often causes a backlog. At this time, the middle chamber needs to be depressurized. [0003] There are three types of existing ball valve seats, which are 1) double valve seats are in the form of one-way sealing (DDB), that is, when the pressure of the medium in the middle cavity rises, it can be discharged into the upstream and downstream pipelines through the double-sided valve seats, Perform pressure relief in the middle chamber; 2) Double-seat bidirectional sealing (DIB-1) form, that is, when the medium pressure in the middle chamber rises, the valve seats and the ball on both sides can still achieve sealing, preventing the me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K5/06F16K5/20F16K27/06F16K27/10
CPCF16K5/0689F16K5/201F16K27/067F16K27/107
Inventor 王龙升张清双
Owner JIANGSU SHENTONG VALVE
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