Spring-compensated movable valve seat plug valve

A technology of spring compensation and seat cock valves, which is applied in the direction of cocks, valve devices and engine components including cut-off devices, which can solve problems such as high-pressure leakage, achieve the effect of solving leakage problems and ensuring tight fit

Pending Publication Date: 2019-08-06
HARBIN HBC VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to design a spring-compensated movable seat plug valve, whi

Method used

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  • Spring-compensated movable valve seat plug valve
  • Spring-compensated movable valve seat plug valve

Examples

Experimental program
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Embodiment Construction

[0010] exist figure 1 In the illustrated embodiment, the valve is welded or otherwise mounted to the pipeline. When it is opened, the rotary actuator moves, and the actuator drives the cock to rotate. When the through hole on the cock communicates with the channel of the valve body, the valve opens and the medium circulates; when it is closed, the rotary actuator also moves, and the actuator drives the cock to rotate. When the cock is on When the valve seat rotates to the same axis as the valve body channel, the sealing surface of the valve seat and the wall surface of the inner cavity of the valve form a closed sealing pair, and the valve is closed to block the flow of the medium.

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Abstract

The invention relates to a spring-compensated movable valve seat plug valve, and is mainly used for fluid medium conveying pipes. The spring-compensated movable valve seat plug valve mainly includes avalve body, a plug cock, a spring washer, a valve seat, an upper valve cover, a lower valve cover, a sealing O-shaped ring and other components, a valve actuating mechanism is connected to the upperpart of the plug cock, a through hole is formed in the plug cock, the valve seat is mounted on the plug cock, the actuating mechanism drives the plug cock and the valve seat on the plug cock to do therotational motion in the valve body, the seat and the inner wall surface of the valve body form a sealing pair, and a circulating channel is opened or closed through the rotation. According to the spring-compensated movable valve seat plug valve, tight attaching of the sealing pair can be effectively ensured through the compensation force of a spring, the sealing performance is improved, the valve seat is designed to communicate with the medium through a circulating hole on the back face, through the asymmetric structure of the back face of the valve seat and the forced area of the sealing face, the forced area of the back face of the valve seat is greater than the sealing face area, the certain pressure difference is produced between the valve seat sealing face and the back face of the lave seat during working, and the pressure of the back face of the valve seat is greater than that of the sealing surface side, so that the media pressure is high, and the sealing performance is better.

Description

technical field [0001] The invention relates to a spring-compensated movable seat cock valve. The device is a quick switch type straight-through valve, which is mainly used as an opening and closing device on medium transmission pipelines in thermal power, nuclear power, petrochemical, natural gas, HVAC and other industries. Background technique [0002] Existing cock valves generally adopt a tapered cock hard seal mechanism, and the sealing pair is generally a fixed structure. After the valve changes in temperature or works for a period of time, due to wear and tear, the sealing surfaces cannot be well matched together, resulting in valve leakage; at the same time, When the medium contains suspended particles, the poor adjustment between the sealing pairs will lead to the occurrence of jamming events; in addition, the leakage of the valve will also be caused by the insufficient sealing specific pressure when working at high pressure. The spring-compensated movable seat cock...

Claims

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Application Information

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IPC IPC(8): F16K5/04F16K5/08F16K5/14F16K5/18
CPCF16K5/0464F16K5/0485F16K5/08F16K5/14F16K5/18
Inventor 赵宇徐娇李茂元胡海鸥王迪于江宁李红梅
Owner HARBIN HBC VALVE
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