All-welded ball valve

An all-welded ball valve and welding groove technology, applied in valve details, valve device, valve shell structure, etc., can solve the problems of poor sealing performance, high maintenance cost, large ball valve rotation torque, etc., to prevent leakage, reduce repair rate, The effect of reducing the rotational torque

Inactive Publication Date: 2014-08-13
KUSN WEISA VALVE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a fully welded ball valve to solve the technical problems of poor sealing performance, high maintenance cost and large rotational torque of the fully welded ball valve in the prior art due to welding deformation.

Method used

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  • All-welded ball valve
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0016] Such as figure 1 , figure 2 As shown, a fully welded ball valve includes a valve body 1, a valve cavity is opened in the valve body 1, a valve ball 2 is arranged in the valve cavity, the valve ball 2 is supported on the valve cavity by a valve seat 3, the two sides of the valve body 1 A valve cover 4 is provided at the end, and a medium channel communicating with the valve chamber is opened on the valve cover 4 . A stop step is provided on the end face of the valve cover 4 that is in contact with the valve body 1, and the valve body 1 is supported on the stop step. A welding groove 5 for welding the valve body 1 and the valve cover 4 is provided between the valve body 1 and the valve ...

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Abstract

The invention discloses an all-welded ball valve in the technical field of valves. The all-welded ball valve comprises a valve body, wherein a valve cavity is opened in the valve body, a valve ball is arranged in the valve cavity, the valve ball is supported on the valve cavity by a valve seat, a valve cover is arranged at the both ends of the valve body, a medium channel communicated with the valve cavity is opened in the valve cover, a stop step is opened in the end surface butted with the valve body, of the valve cover, and the valve body is supported on the stop step; a welding groove for welding the valve body and the valve cover is formed between the valve body and the valve cover, a heat isolation groove is opened below the welding groove, a gap is reserved between the valve body and the valve cover, and located in the bottom of the welding groove, and the gap is communicated with the welding groove and the heat isolation groove. According to the all-welded ball valve disclosed by the invention, the gap communicated with the heat isolation groove is formed in the bottom of the welding groove, thus ensuring adequate welding between the valve body and the valve cover, avoiding the occurrence of insufficient welding, reinforcing the connection reliability of the valve body and the valve cover, ensuring sealing performance, reducing the repair rate of the ball valve, and prolonging the service life of the ball valve.

Description

technical field [0001] The invention relates to a ball valve, in particular to an all-welded ball valve, which belongs to the technical field of valves. Background technique [0002] All-welded ball valves have been widely used in various fluid pipelines, waste gas selective release pipelines, gas and heat supply pipelines due to their compact structure and convenient assembly. However, all-welded ball valves have many shortcomings during use, such as: valves Leakage, high torque or failure to open, etc., the main reason is that the valve body, valve cover and other related parts are deformed due to welding shrinkage, which needs to be cut along the weld with a lathe, and then the parts inside are disassembled. For rework, the original welded parts of the valve body and bonnet need to be rewelded and machined to size before assembly and welding. It is acceptable for small-sized or low-pound ball valves to be repaired in this way, but it is very troublesome for large-diamete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/08F16K27/06
CPCF16K5/0605F16K5/227F16K27/067F16K27/08F16K27/107
Inventor 郭宏贵方月英周向青
Owner KUSN WEISA VALVE
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