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High exhaust check valve of critical and supercritical thermal power generating set valve

A technology of thermal power units and check valves, which is applied in the direction of valve details, control valves, valve devices, etc., can solve the problems of no guarantee of closing time and automatic opening, etc., and achieve light weight, good resistance to force, and small pipeline load Effect

Active Publication Date: 2014-03-19
DALIAN DAGAO VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there is no actuator outside this type of valve, it cannot be opened automatically, and the closing time is not guaranteed

Method used

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  • High exhaust check valve of critical and supercritical thermal power generating set valve
  • High exhaust check valve of critical and supercritical thermal power generating set valve
  • High exhaust check valve of critical and supercritical thermal power generating set valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] combine Figure 1 to Figure 8 , to further illustrate the structure of the high row check valve of the present invention:

[0031] (1) The rocker arm 4, the disc 3, the cotter pin 7, the disc nut 6, the disc nut washer 5, and the anti-rotation pin 8 are assembled into components and placed in the valve body 1, and the valve seat 2 is welded on the valve body 1;

[0032] (2) The forced opening shaft 22 left sleeve 23 key 24 is installed in the shaft pin hole on the left side of the valve body 1 (see figure 2 ), connected with the rocker arm 4 assembly. Insert the strong closing shaft 25 and the right bushing 39 on the right side of the shaft pin hole of the valve body 1;

[0033] (3) Filling 29 is installed in the pin holes on both sides of the valve body 1, and the right bracket stud 28 and the left bracket stud 46 are screwed into both sides of the valve body 1. Screw in the right packing plate stud 36 on the right bracket 35, install the right packing plate 31, pac...

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PUM

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Abstract

The invention relates to the field of thermal power valves for critical and supercritical thermal power generating set systems, particularly to a high exhaust check valve of a critical and supercritical thermal power generating set valve, which is characterized in that the left shaft sleeve key of a forced-opening shaft is mounted in the left side shaft pin hole of a valve body and connected with a rocker arm assembly; a forced-opening shaft and a right shaft sleeve are inserted into the right side of the shaft pin hole of the valve body; a right filler press plate stud is screwed into a right bracket; a right filler press plate, a filler, a press sleeve right filler press plate stud, a guide sleeve, a bearing, a bearing gland, an oil cup and a spiral wound gasket are all embedded into the forced-opening shaft, and are matched tightly with the valve body; a filler, a filler press sleeve, a left bracket, a bearing, a bearing gland and a guide sleeve on the left side forced-opening shaft are assembled to be inserted into the forced-opening shaft together with a switch press plate; a forced-opening transmission handle and a forced-closing transmission handle are mounted on the two sides of the forced-opening shaft and then in the cylinder, and a cylinder rear cover and a force-opening cylinder rear cover O ring are mounted; and after the cylinder is assembled, a forced-opening cylinder and a forced-closing cylinder are mounted respectively. The high exhaust check valve can automatically open, and the forced-closing cylinder can automatically and quickly close the valve within 0.5 seconds in case of emergency.

Description

technical field [0001] The invention relates to the field of thermal power valves used in critical and supercritical thermal power generating set systems, in particular to a high-discharge check valve for one gigawatt critical and supercritical thermal power generating set valves. Background technique [0002] Critical and supercritical coal-fired generating sets related valves are high discharge check valves, that is, swing check valves with additional actuators. This valve is installed on the pipeline between the high pressure cylinder and the reheater to prevent reheating caused by unstable air flow. The device medium flows back into the high-pressure cylinder, which plays a protective role for key equipment. In the prior art, there is no actuator outside this type of valve, so it cannot be opened automatically, and the closing time is not guaranteed. In case of emergency, the valve cannot be closed automatically within less than 0.5 seconds. Closing the valve can preve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K15/03F16K27/00F16K31/122F16K41/02
Inventor 陈力
Owner DALIAN DAGAO VALVE
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