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Low-operating-torque plug valve with replaceable valve sleeve seal and working method thereof

An operating torque, plug valve technology, applied in the field of plug valves, which can solve problems such as the reduction of tightness and rapid operability

Active Publication Date: 2021-09-14
浙江福瑞科流控机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low operating torque plug valve with replaceable valve sleeve seal and its working method. After long-term use, the sealing valve sleeve can be replaced to ensure the sealing between the plug body and the valve body. At the same time, the operating torque is reduced by designing a variable oil chamber to solve the problem of reduced sealing and quick operability in the prior art due to long-term use

Method used

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  • Low-operating-torque plug valve with replaceable valve sleeve seal and working method thereof
  • Low-operating-torque plug valve with replaceable valve sleeve seal and working method thereof
  • Low-operating-torque plug valve with replaceable valve sleeve seal and working method thereof

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in t...

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Abstract

The invention discloses a low-operating-torque plug valve with a replaceable valve sleeve seal and a switch working method thereof. The low-operating-torque plug valve comprises a valve body, a valve cover, a valve rod and an operating device. By designing the replaceable valve sleeve, the problem that the sealing performance is reduced due to abrasion after the valve is used for a long time is solved, the sealing specific pressure between the plug body and the valve body is ensured, and the interchangeability of sealing pieces is achieved. In addition, an oil cavity between the valve rod and the operating device is designed to be variable, so that the operating torque of the plug body in the opening and closing process is reduced, and abrasion of the valve sleeve between the plug body and the valve body is reduced. The service life of the valve is prolonged, the use cost of the valve is reduced, the valve can be quickly opened and closed under extreme conditions due to the characteristic of low operation torque, and the occurrence rate of accidents is reduced.

Description

technical field [0001] The invention relates to a plug valve, in particular to a low operating moment plug valve with replaceable valve sleeve seal and its working method. Background technique [0002] The plug valve is a closing member or a plunger-shaped rotary valve. By rotating 90 degrees, the channel port on the valve plug communicates with or separates from the channel port on the valve body to realize opening or closing. The shape of its valve plug can be cylindrical or conical, and the channel is trapezoidal. [0003] When the existing bushing plug valve is used in seawater desalination and petrochemical industry, in order to meet the greater market demand, the production capacity of the invested project will be doubled, and the plug valve must be able to withstand the nominal pressure of high pressure or ultra-high pressure, It also needs to have good sealing, fast operation and convenient maintenance requirements. [0004] However, due to the limitations of the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/02F16K5/16F16K27/06F16K27/08F16K39/06F16K41/02
CPCF16K5/0292F16K5/0242F16K5/0271F16K5/0285F16K5/163F16K5/168F16K27/062F16K27/08F16K39/06F16K41/023
Inventor 郑建军张阳秀李泽玉卢剑波郑坤明宣中宝林利平王起
Owner 浙江福瑞科流控机械有限公司
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