Low-temperature ball valve and control system thereof

A control system, low-temperature technology, applied in the field of mechanical valves, can solve the problems of poor valve sealing wear resistance, perforation, weld leakage, etc., to achieve the effect of improving service life and sealing, small flow resistance, and reducing gaps

Active Publication Date: 2013-05-01
JIANG SU YAN DIAN FA MEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a control valve for pipeline transportation, due to the solid particles in the medium, the first reason is that the valve seal has poor wear

Method used

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  • Low-temperature ball valve and control system thereof
  • Low-temperature ball valve and control system thereof
  • Low-temperature ball valve and control system thereof

Examples

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Embodiment Construction

[0116] The cryogenic ball valve of the present invention includes a valve body, a valve cover, a valve seat assembly, a ball, a valve stem, a spring, a fixed shaft, a long neck bracket, a top bracket, a driving device, and the like. The valve body and the valve cover each have flow passages, and the valve body and the valve cover are connected through gaskets, studs and nuts. The ball is placed in the valve body, and there is a valve seat assembly on both sides of the ball, which are respectively connected to the inside of the valve body and the valve cover. The driving device is connected to the upper part of the valve stem through a key, and the lower end of the valve stem is connected to the ball. The rotation makes the valve stem and the ball rotate around the axis to realize the opening and closing of the valve at 90°.

[0117] The bottom surface of the upper part of the sphere in contact with the valve stem adopts an arc surface, and the two sides are corresponding paral...

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PUM

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Abstract

The invention discloses a low-temperature ball valve, which comprises a valve body, a valve cap, valve seat assemblies, a ball body, a valve rod and a stationary shaft, wherein the valve body and the valve cap are respectively provided with a runner; the valve body and the valve cap are connected by a gasket, a stud and a nut; the ball body is arranged in the valve body; and two sides of the ball body are respectively provided with one valve seat assembly respectively connected with the insides of the valve body and the valve cap. The low-temperature ball valve is further provided with a driving device, wherein the driving device is connected with the upper part of the valve rod by a key, and the lower end of the valve rod is connected with the ball body. According to the low-temperature ball valve disclosed by the invention, a welding line for connecting the valve body and the valve seat adopts a full-automatic welding technology, and the valve body and the valve seat adopt the U-shaped welding line so as to eliminate a leaking point in the welding line for the valve body and the valve seat. The valve sealing surface adopts Stellite hard alloy, the surface is formed by rolling, and the service life of the valve is prolonged. The sealing surface adopts automatic grinding, and the goodness fit of the sealing surface is improved.

Description

technical field [0001] The invention relates to the technical field of mechanical valves, in particular to a low-temperature ball valve and its control system. Background technique [0002] With the increasing production capacity of petroleum, petrochemical, electric power, metallurgy and other industries, there is an urgent need for a high-performance, high-parameter valve product to replace the original old product to ensure production and improve work efficiency. [0003] As a control valve for pipeline transportation, due to the solid particles in the medium, the first reason is that the valve seal has poor wear resistance, the sealing surface is easily damaged, and the weld seam of the valve body and seat is impenetrable, resulting in weld failure. Seam leakage or perforation. With the continuous improvement of valve technology and the emergence of high-performance materials and automation equipment, old products gradually withdraw from market competitiveness. Conten...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K31/02
Inventor 李昌跃黄晓峰李海伟顾世军马正平孙德林刘慎良
Owner JIANG SU YAN DIAN FA MEN CO LTD
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