Maintenance-free high-pressure-difference gas-phase medium valve system

Abstract

The invention discloses a maintenance-free high-pressure-difference gas-phase medium valve system. The system comprises a high-pressure-difference valve, a Laval pipe and a shrinkage pipe and is characterized in that the Laval pipe is fixedly installed at one end of the high-pressure-difference valve, the shrinkage pipe is fixedly installed at the end, away from the high-pressure-difference valve, of the Laval pipe, the high-pressure-difference valve is a gas-phase medium drainage emptying valve and is a gas-phase medium valve, the gas-phase medium valve is particularly a high-pressure-difference valve with the drainage emptying function, the Laval pipe is composed of a Laval inlet section, a Laval shrinkage section, a Laval balance section, a Laval diffusion section and a Laval outlet section, and the shrinkage pipe is composed of a shrinkage pipe inlet section, a shrinkage pipe shrinkage section and a shrinkage pipe outlet section. The maintenance-free high-pressure-difference gas-phase medium valve system is simple and practical, the maintenance period is shortened, the cost is reduced, and stable operation of a power plant is guaranteed.

Description

Technical field [0001] The present invention is mainly directed to the technical field of high-temperature high pressure steam valve in thermal power plants, in particular, a maintenance-free high-pressure differential gas phase medium valve system. Background technique [0002] In the thermal power plant crew, many high-temperature high pressure valves are used, such as an emergency hydrophobic emptying valve, because the valve exit is emission, resulting in a large pressure difference in the valve, the valve is started after the high-pressure steam, so in the valve Open the instant, the medium flow rate is very large, resulting in a huge impact, and the high-speed fluid will quickly rinse the sealing surface, even decormed the valve body, resulting in a valve leak or valve newspaper. The leakage high temperature and high pressure medium will threaten on-site personnel and equipment, which will bring great security hazards to the operation of the unit, and the valve maintenance ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a maintenance-free high-pressure differential gas-phase medium valve system to solve the erosion of the valve and pipeline by the flowing medium during the start-stop process of the valve, avoid damage to the valve and pipe wall, and steam leakage

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