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Wear resistant gate valve and control system thereof

A control system and gate valve technology, applied in the field of gate valve machinery, can solve the problems of poor valve seal wear resistance, impermeable weld seam of valve body and valve seat, perforation, etc., to reduce gap, improve service life and sealing performance, flow small resistance effect

Active Publication Date: 2014-11-26
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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  • Wear resistant gate valve and control system thereof
  • Wear resistant gate valve and control system thereof
  • Wear resistant gate valve and control system thereof

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Effect test

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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Abstract

The invention discloses a wedged hard sealing wear resistant gate valve. The gate valve comprises a valve body, a valve base, a gate plate, a valve rod, a valve cover and a driving device. The valve body and the valve cover are made of WCB; the sealing surface of the valve adopts is made of hard alloys; and the surface is formed through rolling. A welding lineconnecting the valve body and the valve base is realized by a full-automatic welding method; and the welding line of the valve body and the valve base is U-shaped. The sealing surface of the valve is made of Stellite hard alloys; the surface is formed through rolling; and the hardness can reach HRC 45; and the sealing surface is automatically grinded. The gate valve is an elastic gate plate; a tie piece is added at one side of a T-shaped groove of the gate plate; the edge part of a guide groove of the gate plate takes the shape of a round corner; the corners of an upper sealing base, a filler pad and a filler pressure sleeve of the gate valve all take the shape of round corners; and the surface of the valve rod is formed through rolling, and is subjected to nitriding treatment. The service life of the valve is prolonged; and the tightness of the valve is improved.

Description

technical field [0001] The invention relates to the technical field of gate valve machinery, in particular to a wear-resistant gate 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. Cont...

Claims

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Application Information

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IPC IPC(8): F16K3/02F16K3/28F16K5/06F16K31/02F16K37/00
CPCF16K3/02F16K3/0263F16K3/28F16K3/316F16K5/0605F16K27/044F16K27/105F16K31/02F16K37/0091
Inventor 李海伟李昌跃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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