Feed water regulating valve

A water supply regulating valve and valve body technology, which is applied in the field of regulating valves, can solve the problems of reduced working surface, reduced regulating performance, valve erosion and other problems in the service life of the valve, so as to prolong the service life, reduce vibration and noise, and reduce the flow path The effect of velocity

Inactive Publication Date: 2010-06-16
SHANGHAI PINGAN HIGH PRESSURE REGULATING VALVE FACTORY
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AI Technical Summary

Problems solved by technology

However, in the supercritical unit above 300MW, due to the extremely high flow rate, the erosion, vibration, noise and other problems of the valve are more serious, and the flow rate increases with the change of the stroke, the regulation performance is also reduced, and the actual service life of the valve The continuous working surface is greatly reduced due to high pressure, high temperature and high flow rate

Method used

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Embodiment Construction

[0020] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0021] see figure 1 , a water supply regulating valve, with a valve body 1 at the bottom, with water inlet and outlet ports 2 on both sides of the valve body 1, the water inlet and outlet ports communicate with the water inlet and outlet channels inside the valve body, the valve body 1 has a valve seat 4 inside, and the water inlet and outlet channels Dislocation arrangement, that is, the water inlet and outlet channels are located on the upper and lower sides of the valve seat 4 respectively. A valve seat gasket 3 is arranged between the valve seat 4 and the valve body 1 . A labyrinth disc 5 and a flow equalizing cover 7 are arranged above the valve seat 4 in the valve body 1. Both the labyrinth disc 5 and the flow equalizing cover 7 are ring-...

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Abstract

The invention relates to a feed water regulating valve which comprises a valve body, a valve core and a valve seat, wherein the valve core and the valve seat are arranged in the valve body; the valve core is also connected with a valve rod; a labyrinth disc is arranged above the valve seat in the valve body; a flow equalization cover is arranged above the labyrinth disc; the labyrinth disc and the flow equalization cover are annular; and the valve core can pass through the labyrinth disc and the flow equalization cover in a sliding way. In the valve core structure of the invention, a labyrinth type zigzag flow passage structure and a new multi-stage balanced depressurized valve core design are adopted, thereby improving the resistance coefficient of a throttling component, increasing the adjustable amplitude of the resistance coefficient, reducing the flow rate of the flow passage, greatly improving the flow regulating performance of a high differential pressure regulating valve, reducing the vibration and the noise of the regulating valve and prolonging the service life.

Description

technical field [0001] The invention relates to the technical field of power station water supply systems, in particular to a regulating valve in the power station water supply system. The regulating valve mainly regulates the water volume and pressure of the boiler to ensure that the power station boiler always operates within the normal parameter range. Background technique [0002] The feed water regulating valve is installed between the feed water pump and the boiler. With the development of the domestic thermal power industry towards large units, the unit parameters are getting higher and higher, and the nominal pressure is also increasing, which can reach 60mPa, while the traditional water supply regulating valve is multi-stage The orifice plate throttling and reducing pressure has a resistance coefficient of 10, which can solve the cavitation problem of the valve when the pressure difference is not high. However, in supercritical units above 300MW, due to the extremel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K47/02F16K47/08F16K27/00
Inventor 陆亚安蔡宝根陆耀威朱峰范国良
Owner SHANGHAI PINGAN HIGH PRESSURE REGULATING VALVE FACTORY
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