Multifunctional sleeve type energy dissipation valve

Abstract

The invention discloses a multifunctional sleeve type energy dissipation valve. A lower end of a valve shaft is connected with an adjusting cylinder. An upper end of the valve shaft is connected with big and small piston units which are disposed on a valve cover by passing through the valve cover. The lower cavity of the big piston and the upper cavity of the small piston are communicated with atmosphere. A water inlet of the valve is respectively connected with the lower cavity of the small piston and the upper cavity of the big piston by a first by-pass accessory. A water outlet of the valve is communicated with the upper cavity of the big piston by a decompressing end of a decompressing valve. Or, the water inlet of the valve is respectively connected with the lower cavity of the smallpiston, the upper cavity of the big piston and a control end of a decompression guiding valve by a second by-pass accessory, and the water outlet of the valve is communicated with the upper cavity ofthe big piston (33) by a decompressing end of the decompression guiding valve. The invention is a multifunctional self-force sleeve type energy dissipation valve which has reliable structure, stable property, functions of dissipating energy and gas etching and can adapt to high-differential working conditions and can be applied to pressure reduction and decompression working conditions.

Description

technical field [0001] The invention relates to a valve for controlling the outlet of a water pump, in particular to a valve with a sleeve structure driven and controlled by hydraulic force in a pipeline. technical background [0002] Chinese patent 0222909.7 discloses a porous sleeve type hydraulic control pressure reducing valve, which is characterized in that through the perforated sleeve set in the valve body, the fluids collide with each other when passing through the valve to achieve energy dissipation and reduce cavitation. However, in practical applications, when the pressure difference between the inlet and outlet is very large, especially when the outlet pressure P2 discussed is close to 0, since the upper cavity, lower cavity and valve disc of the diaphragm are all subjected to the inlet pressure P1 at this time, and there is also a valve The pressure of the spring above the disc makes the valve disc unable to achieve pressure balance at a low opening, so the open...

AI Technical Summary

Problems solved by technology

However, in practical applications, when the pressure difference between the inlet and outlet is large, especially when the outlet pressure P2 discussed is close to 0, since the upper chamber, lower chamber and valve disc of the diaphragm are all subjected to the inlet pressure P1 at this time, there is also a valve The pressure of the spring above the disc makes the valve disc unable to achieve pressure balance at a low opening, so the opening and closing of the valve disc fluctuates, resulting in strong vibration and noise in the pipe network during operation

Unable to give full play to its advantages of energy dissipation and cavitation elimination

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