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Steam turbine and quick-closing valve thereof

A quick-closing valve and valve disc technology, applied in the field of steam turbines, can solve the hidden dangers of safety, cannot solve the problem of internal excitation of the quick-closing valve, and cannot fundamentally solve the problem of excitation, so as to reduce the influence and improve the coordination effect.

Pending Publication Date: 2019-11-26
浙江华元汽轮机械有限公司
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AI Technical Summary

Problems solved by technology

This structure can reduce the opening force of the entire quick-closing valve to a certain extent, thereby reducing the size of the valve stem or driving parts and improving the safety during the opening process of the quick-closing valve, but it cannot solve the problem of quick-closing valve caused by high-pressure steam impact. The internal vibration of the valve, therefore, it cannot fundamentally solve the problem of vibration, and there is still a big safety hazard in the process of using the quick-closing valve

Method used

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  • Steam turbine and quick-closing valve thereof
  • Steam turbine and quick-closing valve thereof
  • Steam turbine and quick-closing valve thereof

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0034] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention provides a steam turbine and a quick-closing valve thereof. The quick-closing valve comprises a housing, a valve seat, a valve element and a valve rod, wherein the housing is equipped with a steam inlet and a steam outlet; the valve seat is arranged at the steam outlet, and communicates with the steam outlet; the valve element is arranged in the housing and is opposite to the valve element; one end of the valve rod is connected to the valve element, and the other end of the valve rod penetrates through the housing and then is connected to a drive mechanism; the valve element comprises a valve disc of a hollow cylindrical structure, one end of the valve disc is opposite to the valve seat, and is equipped with an end surface, and the other end of the valve disc is open; a sleeve sleeves outside the valve disc; and one end, away from the valve seat, of the sleeve is fixedly arranged on the housing. The quick-closing valve adopts a hollow valve element structure, and improvescoordination of gravity distribution of the quick-closing valve; and opening force is relatively small while the valve disc and the valve seat are separated, and the dimension of the valve rod drivemechanism can be reduced, so that the integral dimension of the quick-closing valve is reduced.

Description

technical field [0001] The invention relates to a valve, in particular to a quick-closing valve and a steam turbine using the quick-closing valve. Background technique [0002] Quick-closing valves are widely used in high-speed rotating turbomachinery such as steam turbines, and are the main switch mechanism between the main steam pipeline and the steam turbine. The intake air of the steam turbine is usually high-parameter steam. The high flow rate of this high-parameter steam will have an impact on the valve core, and when it flows through the irregular space inside the quick-closing valve, it will easily cause turbulence, which will not only reduce the stability of the valve body. Sexuality, and will accelerate the damage of the spool. Therefore, in an emergency, it is necessary to cut off the steam inlet of the steam turbine immediately to stop the unit quickly to achieve the purpose of protecting the unit; the quick-closing valve is the main switch mechanism for quickly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/00F16K31/122B01D35/04F01D17/10
CPCF16K1/00F16K31/1221B01D35/04F01D17/10
Inventor 李来生步汉明严懿翔沈国杭徐生娟李鑫胡爱军蒋建业
Owner 浙江华元汽轮机械有限公司
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