Low-temperature spherical valve

A ball valve and low-temperature technology, which is applied in the direction of valve devices, cocks including cut-off devices, engine components, etc., can solve the problems of pre-tightening force reduction, leakage, and sealing performance reduction, so as to reduce opening torque, improve sealing reliability, and seal Effect of Reliability Improvement

Inactive Publication Date: 2014-05-07
ZHANGJIAGANG FURUI SPECIAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-metallic materials will shrink and deform greatly at ultra-low temperature, which will lead to a significant drop in the pre-tightening force between the ball lining and the ball, reducing the sealing performance and even causing leakage

Method used

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  • Low-temperature spherical valve

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Embodiment Construction

[0015] The present invention will be described in further detail below through specific examples.

[0016] Such as figure 1 As shown, a low-temperature ball valve includes a main valve body 7, a side valve body 2, a ball 1, a bonnet assembly 10 and a valve stem 8, and the main valve body 7 is provided with an outlet channel 11 and a ball 1 installation cavity; The side valve body 2 is provided with an inlet passage 12, and the side valve body 2 and the main valve body 7 are fastened by bolts 9, and the contact and mating surfaces of the side valve body 2 and the main valve body 7 are all set as steps Shape, a sealing ring is set between the side valve body 2 and the main valve body 7, and the side valve body 2 and the main valve body 7 are arranged in a stepped shape to facilitate assembly and sealing; the ball 1 is installed in the installation cavity of the ball 1 , the ball 1 is covered by the side valve body 2 and the main valve body 7, and the side valve body 2 is provid...

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PUM

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Abstract

The invention discloses a low-temperature spherical valve which comprises a main valve body, a side valve body, a sphere, a valve cover assembly and a valve rod, wherein the main valve is provided with an outlet channel and a sphere mounting chamber; the side valve body is provided with an inlet channel; the sphere is mounted in the sphere mounting chamber; the side valve body is fixed on the main valve body and covers the sphere; the side valve body is provided with a plurality of spring mounting holes extending in the direction that a medium flows, and a circular caulking groove; the spring mounting holes are communicated with the caulking groove; a compensation spring and a gasket are mounted in each spring mounting hole; a sphere gasket is mounted in the caulking groove and is in extrusion seal fit with the sphere; the sphere and the sphere mounting cavity are sealed through the sphere gasket; the valve cover assembly is fixed on the main valve body; the valve rod penetrates through the valve cover assembly and is fixedly connected with the sphere. The low-temperature spherical valve increases the balancing force to the sphere gasket, still has favorable sealing performance when the sphere gasket is subjected to low-temperature shrinkage distortion, and thus is suitable for being used in pipelines of low-temperature media.

Description

technical field [0001] The invention relates to a low-temperature ball valve, in particular to a storage and transportation equipment and pipeline for low-temperature liquefied gases such as liquid oxygen, liquid argon, liquid nitrogen and liquefied natural gas (LNG), which can be used to connect and connect low-temperature media. Cryogenic ball valve with closing action. Background technique [0002] At present, the ball valve generally includes a main valve body, a side valve body, a ball, a bonnet assembly and a valve stem. The ball is installed in the main valve body and the side valve body. On the body and the side valve body, the valve stem is fixedly connected with the ball. The ball, the main valve body and the side valve body are sealed by the sealing ball lining. However, when the ball valve with this structure is used in the low-temperature and low-temperature medium pipeline, the ball valve has the following problems: the ball lining material of the low-temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20
CPCF16K5/0689F16K5/201
Inventor 伍国东胡晨曦王瑞东周晓会张宏豫江章亮
Owner ZHANGJIAGANG FURUI SPECIAL EQUIP CO LTD
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