A decompression device and valve structure and method capable of reducing cavitation damage

Abstract

The invention discloses a decompression device capable of reducing cavitation damage, a valve structure and a method, and belongs to the field of industrial valve design. The decompression device includes an outer shell, a sealing cover and a decompression shaft; the partition plate separates the internal chamber into a first flow channel cavity and a second flow channel cavity. The first flow path cavity communicates with the cavitation area in the valve of the target valve, so that the fluid flowing into the target valve from the outlet of the second pipeline can flush the cavitation area; the second flow path cavity is used to connect with the inlet of the target valve The tube is connected; a decompression shaft that can move up and down is coaxially provided in the inner chamber. When the decompression shaft is in the initial state, the second protrusion can close the second through hole, and the first protrusion can close the second through hole. The above through hole is closed; when the decompression shaft moves upward, both the second through hole and the through hole are in an open state. The invention can assist in reducing the cavitation of the valve and the cavitation damage of key components, thereby reducing the number of operation and maintenance of the valve and saving the operation and maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of valve equipment, and in particular relates to a decompression device capable of reducing cavitation damage, a valve structure and a method. Background technique [0002] Cavitation is an unfavorable hydrodynamic phenomenon, which will cause extremely serious damage to valve components and damage to the valve structure, thereby reducing the service life of the valve, especially under high pressure difference. The cavitation and damage of the valve are particularly serious. For the regulating valve, it is necessary to avoid the occurrence of cavitation as much as possible, otherwise it will cause serious damage to the valve core. [0003] Every year due to cavitation damage, the valve core structure in the severe cavitation area must be replaced frequently. If the operation is stopped, the maintenance cost and production stoppage cost are high. Therefore, how to reduce the maintenance frequency not only red...

AI Technical Summary

Problems solved by technology

[0003] Every year due to cavitation damage, the valve core structure in the severe cavitation area must be replaced frequently. If the operation is stopped, the maintenance cost and production stop cost are high. Therefore, how to reduce the maintenance frequency not only reduces the maintenance cost but also reduces the loss caused by the stop production

At present, the research on valve cavitation is mainly aimed at the optimized design of valve internal parts, so as to reduce the impact of cavitation on the valve structure, but in the optimal optimization situation, it is impossible to further reduce the impact of cavitation on the valve

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