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Low-temperature ball valve and control system thereof

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

Active Publication Date: 2015-01-14
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 resistance, the sealing surface is easily damaged, and the weld seam of the valve body and seat is impenetrable, resulting in weld failure. perforation

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

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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 a flow channel, and the valve body and the valve cover are connected by gaskets, studs and nuts. The ball is placed in the valve body, and a valve seat assembly is placed on each side of the ball, which is connected to the inside of the valve body and the bonnet respectively. The driving device is connected with the upper part of the valve stem by a key, and the lower end of the valve stem is connected with the ball. Rotation makes the valve stem and the ball rotate around the axis to realize the valve opening and closing at 90°.

[0117] The bottom surface of the contact part between the upper part of the sphere and the valve stem adopts an arc-shaped surface, and the two sides are corresponding parallel pl...

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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 cryogenic ball valve and its control system. Background technique [0002] As the production capacity of petroleum, petrochemical, electric power, metallurgy and other industries increases, there is an urgent need for a high-performance, high-parameter valve product to replace the original old product to ensure output and improve work efficiency. [0003] As a control valve for pipeline transportation, because the medium contains particulate solids, the first reason is that the valve seal has poor wear resistance, the sealing surface is easily damaged, and the welding seam of the valve body and valve seat is not penetrated, resulting in welding Seam leakage and even perforation. With the continuous improvement of valve technology, the appearance of high-performance materials and automation equipment has led to the gradual withdrawal of old products from market competitivene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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