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High pressure exhaust check valve

A technology of check valve and high discharge, which is applied in the direction of valve details, control valves, valve devices, etc., to achieve the effect of safe and reliable sealing, reliable sealing and increased sealing performance

Active Publication Date: 2013-12-18
SUFA TECH IND CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional thermal power high-end valves have long relied on imports

Method used

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Experimental program
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Effect test

Embodiment Construction

[0012] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0013] Such as figure 1 As shown, a high-row check valve includes a valve body 1. A 30° valve body seat ring hole is arranged in the valve body 1. A rocker 4 is connected to the valve body seat ring hole through a key 33. On the rocker rod 4 There is a hole, and a pin 7 is pierced in the hole. The pin 7 connects the rocker 4 and the valve disc 3 together. The pin 7 is also connected with a lock nut 5. A lock washer is placed between the lock nut 5 and the pin 7. 6. The top of the valve body 1 is fixed with a bonnet 22 by bolts 20 and nuts 21 , a gasket 31 is placed between the bonnet 22 and the valve body 1 , and the top of the bonnet 22 is also fixed with eyebolts 32 .

[0014] Such as image 3 As shown, one end of the shaft 36 passes through the No. 1 pneumatic actuator 8 and the pressure sleeve 39, the pressure sleeve 39 is fixed on the valve body ...

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Abstract

The invention belongs to a valve structure and particularly relates to a high pressure exhaust check valve for an ultra-supercritical thermal power generating unit. The valve has the advantage that a valve cavity is in the shape of a reversed cone, and the valve cavity liquid accumulation problem is effectively solved. When the valve flow is small, the high pressure exhaust check valve achieves a forced opening function. An execution mechanism of the high pressure exhaust check valve includes two linear stroke cylinders matched with corresponding connection rod poking fork mechanisms, linear stroke is converted into angular stroke ingeniously, so that the high pressure exhaust check valve can be quickly closed and forcedly opened under lower pressure, flowing capability of the valve is ensured, and the check valve has the advantages of being reliable in sealing, long in service life and the like. A 30-degree inclination angle is adopted in a seat ring hole of a valve body, and operation characteristics of valve performance are improved. Compared with the 5-degree dip angle design of a traditional check valve, the high pressure exhaust check valve can provide larger initial sealing specific pressure to generate low pressure drop and improve valve sealing performance.

Description

technical field [0001] The invention belongs to a valve structure, in particular to a high-row check valve used for an ultra-supercritical thermal power unit. Background technique [0002] my country is a country where coal is the main primary energy source, and conventional thermal power accounts for more than 70% of the installed capacity of electricity. With the development of large-scale units with high parameters, energy-saving and environmentally friendly 600MW and 1000MW super (super) critical thermal power units have become the main units of conventional thermal power units. As a key supporting product of super (super) critical thermal power units, valves are one of the important equipment to ensure the safe and economical operation of the units. However, conventional thermal power high-end valves have long relied on imports. [0003] The high-row check valve is one of the super (super) critical key valves. It has strict technical requirements and high safety facto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/03F16K27/02
Inventor 吴辉龙云飞周玉徐兴华
Owner SUFA TECH IND CNNC
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