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Cascading valve clack type adjusting valve

A technology of regulating valve and valve disc, which is applied in valve details, lift valve, parts contacting between valve elements and valve seat, etc. The effect of improving the sealing level of the valve

Inactive Publication Date: 2014-05-28
HARBIN HBC VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the sealing level, some control valves use unbalanced disc, which will increase the operating force of the valve and increase the cost

Method used

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  • Cascading valve clack type adjusting valve

Examples

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Effect test

Embodiment Construction

[0013] In the embodiment shown in the figure, the center of the valve disc 4 is drilled with an inner flow channel hole, and the upper part is processed with a sealing surface. The valve stem 7 and the auxiliary valve disc 6 are of an integrated structure. The valve disc 4 and the spring 5 pass through the valve disc gland 8 Connect with valve stem 7. When the valve is closed, the valve stem 7 compresses the spring 5, the auxiliary disc 6 presses the inner sealing surface of the valve disc 4, and the lower sealing surface of the valve disc 4 presses the sealing surface of the valve seat 2 to realize the sealing of the two sealing surfaces, and the valve disc 4 becomes non-contact. Balanced structure; when the valve is opened, the auxiliary valve disc 6 is opened first, the upper and lower chambers of the valve disc 4 are connected, the valve disc 4 becomes a balanced structure, and the valve stem 7 drives the valve disc 4 to move up and down through the valve disc gland 8 and s...

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PUM

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Abstract

The invention relates to a cascading valve clack type adjusting valve, and belongs to the field of thermal power and nuclear power valves. The cascading valve clack type adjusting valve is arranged on a water vapor system pipeline of a thermal power and nuclear power unit and is important equipment for adjusting flow, pressure and temperature of media. The cascading valve clack type adjusting valve is composed of a valve clack, a spring, an auxiliary valve clack, a valve rod, a valve clack pressing cover and the like, and the auxiliary valve clack and the valve rod are of an integral structure. When the valve is opened, the auxiliary valve clack is firstly opened, an upper cavity and a lower cavity of the valve clack are communicated, the valve clack is changed to be of a balance structure, and the valve rod drives the valve clack to move vertically through the valve clack pressing cover and the spring. When the valve is closed, the valve rod compresses the spring, the auxiliary valve clack compresses the inner sealing face of the valve clack, the sealing face on the lower portion of the valve clack compresses the sealing face of a valve seat, the two sealing faces are sealed, and the valve clack is changed to be of an unbalance structure. Opening force of the valve is effectively reduced, and sealing performance in the valve closing process is improved.

Description

technical field [0001] The invention relates to a cascade disc type regulating valve, which belongs to the field of thermal power and nuclear power valves. Background technique [0002] The cascading disc type control valve is installed in the water vapor system pipeline of thermal power and nuclear power units, and is an important equipment for regulating the flow, pressure and temperature of the medium. [0003] At present, large-diameter or high-pressure differential regulating valves adopt a balanced disc structure to reduce the operating force of the actuator. This structure will increase the leakage when the valve is closed, and the sealing ring on the sleeve will wear out, reducing the service life of the valve. In order to improve the sealing level, some regulating valves use unbalanced disc, which will increase the operating force of the valve and increase the cost. Contents of the invention [0004] In view of the above technical problems, the object of the pres...

Claims

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Application Information

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IPC IPC(8): F16K1/00F16K1/32F16K1/36
CPCF16K3/246F16K3/26F16K25/04F16K39/04
Inventor 邹世浩万胜军郑红丽娄冬梅
Owner HARBIN HBC VALVE
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