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Ball valve with valve seat sealing device

A sealing device and valve seat technology, which is applied to valve devices, cocks including cut-off devices, engine components, etc., can solve the problems that rubber sealing rings are easily damaged and not durable, and the sealing effect is not obvious, so as to achieve easy closing of ball valves and reduce economic costs. Loss, the effect of small sealing specific pressure

Active Publication Date: 2014-09-03
SHANGHAI KARON VALVES MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used ball valve seat seal is the seal between the rubber and the valve seat. There is no force behind the sealing ring to push the sealing ring and the valve seat to seal. Only the valve seat is pressed against the sealing ring. The sealing effect is not obvious and the rubber sealing ring is easy. damaged not durable

Method used

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  • Ball valve with valve seat sealing device
  • Ball valve with valve seat sealing device

Examples

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Embodiment

[0024] Such as figure 1 and 2 As shown, a ball valve with a valve seat sealing device includes a valve body, a ball, a valve seat 1 and a ball seat 2, the ball seat 2 is fixed on the ball by bolts, and the valve seat is fixed on the valve body Above, the ball valve also includes a ball seat fixing plate 3 fixed on the ball, a gap is formed between the valve seat 1, the ball seat 2 and the ball seat fixing plate 3, and the valve seat sealing device is arranged in the gap.

[0025] The valve seat sealing device includes a first sealing ring 4 and a second sealing ring 5, and the first sealing ring 4 and the second sealing ring 5 are filled in the gap. There are three elongated grooves.

[0026] The sealing ring is made of high-quality wear-resistant polymer polyethylene, so as to ensure that the ball valve seat has a good sealing effect and prolong the service life of the ball valve, reducing the economic loss caused by frequent replacement of rubber sealing rings. Three long...

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PUM

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Abstract

The invention relates to a ball valve with a valve seat sealing device. The ball valve comprises a valve body, a ball body, a valve seat and a ball seat, wherein the ball seat is fixed to the ball body through a bolt and the valve seat is fixed to the valve body. The ball valve is characterized by further comprising a ball seat fixing plate fixed to the ball body. A gap is formed among the valve seat, the ball seat and the ball seat fixing plate, the valve seat sealing device is arranged in the gap, and when the ball valve is closed, three long and thin grooves in a first sealing ring of the valve seat sealing device enable the valve seat sealing device and the valve seat to be sealed automatically through pipeline pressure. Compared with the prior art, the ball valve has the advantages of being simple in structure, economical, durable, good in sealing performance and the like.

Description

technical field [0001] The invention relates to a ball valve, in particular to a ball valve with a valve seat sealing device. Background technique [0002] The ball valve came out in the 1950s. With the rapid development of ball valve science and technology, the continuous improvement of production technology and product structure, it has rapidly developed into a major valve category in just 40 years. In western industrially developed countries, the use of ball valves is increasing year by year. In my country, ball valves are widely used in petroleum refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries. occupies a pivotal position in the national economy. It has the action of rotating 90 degrees. The cock body is a sphere with a circular through hole or channel passing through its axis. The ball valve is mainly used to cut off, distribute and change the flow direction of the medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0689F16K5/205
Inventor 李政宏
Owner SHANGHAI KARON VALVES MACHINERY