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Multiple-sealing full-welding pipeline ball valve

A multi-sealing and all-welding technology, which is applied to the valve details, valve device, valve shell structure, etc., can solve the problems that pipeline ball valves cannot meet, and achieve the effect of meeting the sealing performance and prolonging the service life

Inactive Publication Date: 2014-02-05
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term wear of the sealing surface; the damage of impurities, etc., the pipeline ball valve may not meet the requirements of sealing, safety and service life

Method used

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  • Multiple-sealing full-welding pipeline ball valve
  • Multiple-sealing full-welding pipeline ball valve
  • Multiple-sealing full-welding pipeline ball valve

Examples

Experimental program
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Effect test

Embodiment Construction

[0007] Such as figure 1 As shown, the present invention is a multi-seal fully welded pipeline ball valve, including a valve ball 5, a valve body 7, and a valve stem 10. The valve body 7 is a spherical structure, formed by hot forging of the left and right valve bodies, and welded by a single weld in the middle; The lower part of the valve body 7 is provided with supporting legs 3;

[0008] Such as figure 1 , figure 2 As shown, there are multiple seal structures on the valve seat: the first seal is the soft seal A-2 in front of the valve; the second seal is the soft seal A-1; the preload spring A-4 is preset at the valve seat.

[0009] Such as figure 1 As shown, the support seat 6 and the valve body 7 are connected and fixed by the pin 1 . Such as figure 1 , figure 2 As shown, the contact between the valve seat 2 and the valve body 7 is provided with a graphite sealing ring A-3.

[0010] The working process of the present invention is: when the ball valve is in th...

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Abstract

A multiple-sealing full-welding pipeline ball valve comprises a valve ball (5), a valve body (7) and a valve rod (10), wherein the valve body (7) adopts a spherical structure and is formed through hot forging of a left valve body and a right valve body, and the middle is formed through singe-welding-seam welding; supporting legs (3) are arranged at the lower part of the valve body (7); the valve ball (5) adopts a supporting type and is supported by an upper supporting seat and a lower supporting seat; multiple-sealing structures are arranged on a valve seat; first sealing is realized at a soft seal (A-2) before the valve, and second sealing is realized at a soft seal (A-1); and a pre-tightening spring (A-4) is preset at the valve seat.

Description

technical field [0001] The invention relates to a valve suitable for oil and natural gas long-distance pipelines, in particular to a combined multi-sealing full-welded pipeline ball valve. Background technique [0002] In long-distance pipelines of crude oil and natural gas, full-bore ball valves are widely used, and their sealing performance has an important impact on the long-term stable operation of long-distance pipelines. If the seal is not tight and leakage occurs, it will cause pipeline safety accidents; serious pollution of the environment and even huge economic losses. The valve seat is a part that is prone to leakage, and the sealing structure here is the key to the sealing performance of the ball valve. Due to the long-term wear of the sealing surface; the damage of impurities, etc., the pipeline ball valve may not meet the requirements of sealing, safety and service life. Contents of the invention [0003] The purpose of the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06
CPCF16K5/0689F16K5/201F16K27/067F16K27/107
Inventor 李树勋王虎斌娄燕鹏徐娟娟范宜霖丁强卫
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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