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Externally-threaded ball valve

A threaded ball and ball technology, which is applied in the field of closed ball valves, can solve the problems of affecting the service life of the ball valve and increasing the wear of seals, and achieve the effects of simple structure, prolonged service life and strong pressure resistance.

Inactive Publication Date: 2015-06-10
CHONGQING KEZHONG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the pre-tightening force also increases the wear of the seal, which affects the service life of the ball valve.

Method used

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  • Externally-threaded ball valve

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Embodiment Construction

[0013] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0014] Such as figure 1 As shown, an externally threaded ball valve includes an upper bonnet 4 and a lower bonnet 6, a ball mounting structure 7 is arranged between the upper bonnet 4 and the lower bonnet 6, and a ball mounting structure 7 is fitted in the ball mounting structure 7. A sphere 8, the two ends of the sphere 8 are connected with the inlet end 9 and the outlet end 5 respectively, the top of the sphere 8 is connected with the transmission pin 10 through a spiral groove, and the transmission pin 10 is meshed with the rectangular screw rod 12. The rectangular screw rod 12 passes through the positioning pin 3 and is fixed by the nut 2 .

[0015] The ball installation structure 7 is used for seamless install...

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Abstract

The invention relates to an externally-threaded ball valve. The ball valve comprises an upper bonnet and a lower bonnet, wherein a ball mounting structure is arranged between the upper bonnet and the lower bonnet, a ball is mounted in the ball mounting structure in a matched manner, two ends of the ball are in matched connection with an inlet end and an outlet end respectively, the top end of the ball is connected with a drive pin through a spiral groove, the drive pin is in meshed connection with a rectangular screw, and the rectangular screw penetrates through a positioning pin to be fixed by a nut. The ball valve is simple in structure, low in manufacturing cost, high in pressure resistance and long in service life.

Description

technical field [0001] The invention relates to a closed ball valve, in particular to an external threaded ball valve. Background technique [0002] Due to the good sealing characteristics of ball valves, they are widely used in petroleum, chemical industry, power stations, natural gas long-distance transportation pipelines, etc. The sealing of the ball valve is formed by the pre-set pre-tightening force between the ball and the valve seat plus the force caused by the fluid pressure on the sealing surface of the valve seat. Elastic elements, such as butterfly springs and columnar springs, are arranged between the parts. During the opening and closing process of the ball valve, the pretightening force always acts on the surface of the closing pair, so that the opening and closing torque of the ball valve is greater than that of other types of valves. At the same time, the pre-tightening force also increases the wear of the seal, which affects the service life of the ball va...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K5/08
CPCF16K5/06F16K5/0647F16K27/067
Inventor 陈勇
Owner CHONGQING KEZHONG MACHINERY