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Pressure balance type inverted cock valve

A balanced, plug valve technology, applied in the direction of plugs, valve devices, engine components, etc. including cut-off devices, can solve the problems of plug valve application, sealing surface wear, valve leakage, etc., to avoid high temperature stuck phenomenon, The effect of preventing seizure and reducing the opening torque

Inactive Publication Date: 2014-04-09
WOTAI VALVE KUSN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the plug valves used in China are mainly soft-sealed, small-caliber, and low-pressure, which cannot solve the application of plug valves under high temperature, high pressure, and severe working conditions. High-end plug valve products mainly rely on imports
The sealing surface of the plug valve is easily worn during the opening and closing process, resulting in serious problems such as valve leakage and plug jamming.

Method used

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  • Pressure balance type inverted cock valve
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Embodiment

[0034] Embodiment: please refer to the accompanying drawings, and the present invention will be further elaborated.

[0035] Such as figure 1 and figure 2 As shown, the present invention provides a pressure-balanced inverted plug valve with reliable sealing and preventing the plug from being stuck. It includes valve body 1, valve stem 2, butterfly spring 3, cross connector 4, cock 5, oil filling valve 6, second check valve 7, packing 8, valve cover 9, ball 10, sealing diaphragm 11, adjustment Shaft 12, adjusting shaft gland 13, second check valve 14 and other important parts. According to the form of the cock flow hole, it can be divided into conventional straight type or Venturi type. There are many types of materials for the valve body and internal parts, a wide range of applications, and suitable for various media. Choose a pressure balance plug valve with an inverted structure such that the lower end is larger than the upper end of the tapered cock, and the vulnerable...

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Abstract

The invention discloses a pressure balance type inverted cock valve which comprises a valve body, a cock, a valve rod and padding. The cock is an inverted conical cock with the lower end being larger than the upper end. The cock is arranged in an inner cavity of the valve body, the valve rod drives the cock to rotate, a sealing face of the cock is a conical face, the valve rod is connected with the cock through a cross connector, a cylindrical spring or a belleville spring is arranged between the valve rod and the cock, the lower end of the valve body is fixedly provided with a valve cover, and the valve cover is provided with an adjustment shaft. The lower end of the adjustment shaft penetrates out of the valve cover, and the upper end of the adjustment shaft abuts against the cock. the lower end of the cock is provided with a first check valve, a sealing grease groove is formed in the sealing face of the cock, an oil storage tank is arranged in the valve body, the oil storage tank of the valve body is communicated with the sealing grease groove of the cock, and an oil filling valve communicated with the oil storage tank is arranged outside the valve body. The pressure balance type inverted cock valve can be used under high temperature, high pressure and severe work conditions, and has the advantages of being reliable in sealing, small in operation torque, long in service life, and the like.

Description

technical field [0001] The invention belongs to the technical field of valve manufacturing, and in particular relates to a pressure-balanced inverted plug valve, which is used for the control of gas and liquid delivery pipelines. Background technique [0002] At present, the plug valves used in China are mainly soft-sealed, small-caliber, and low-pressure, which cannot solve the application of plug valves under high temperature, high pressure, and severe working conditions. High-end plug valve products mainly rely on imports. Because the plug valve is very easy to cause wear on the sealing surface during the opening and closing process, so that serious problems such as valve leakage and plug jamming are caused. Therefore, the machining accuracy and matching accuracy required for the plug and valve body sealing surface of the plug valve are very high. Contents of the invention [0003] In order to solve the above problems, the present invention provides a pressure-balanced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/02F16K5/22F16K5/16F16K5/08
CPCF16K5/0207F16K5/0242F16K5/025F16K5/0292F16K5/162F16K5/222
Inventor 张秀坤
Owner WOTAI VALVE KUSN
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