Ultra-high pressure high flow supercharging and unloading system

Abstract

The invention relates to a superhigh pressure large-traffic pressurizing and unloading system, belonging to a superhigh rapid-loading, unloading hydraulic control system for delivery and type tests of a hydraulic support. The invention mainly solves difficult technical problems about low efficiency of pressurizing loading and unloading in current internal-loading hydraulic support test bench, and about frequency failures caused by large impact on hydraulic elements of the system. The technical proposal employed by the invention is as below: the superhigh pressure large-traffic pressurizing and unloading system includes a hydraulic source, a stop valve and a pressure cylinder, wherein the system further includes a pressure reducing valve, electro-hydraulic reversing valves, a pilot operated check valve, a throttle valve and a check valve, an primary pressure opening of the pressure reducing valve is connected with the hydraulic source via the stop valve, a secondary pressure opening of the pressure reducing valve is connected with an liquid inlet P of the electro-hydraulic reversing valve; an A opening of the electro-hydraulic reversing valve is connected with a low pressure chamber of the pressure cylinder, a low pressure rod chamber of the pressure cylinder, an O opening of the electro-hydraulic reversing valve and an O opening of another electro-hydraulic reversing valve are connected with a liquid supply tank via the stop valve.

Description

technical field [0001] The invention relates to an ultra-high pressure and large-flow pressurization and unloading system, which belongs to a hydraulic control system for ultra-high pressure rapid loading and unloading used for hydraulic support delivery or type testing. Background technique [0002] The hydraulic support test bench generally adopts the method of internal loading to carry out the strength and life test of the structural parts. When loading ask to press figure 1 In the pressure change cyclic loading test shown, the maximum test pressure can reach 70-80MPa, and the volume of the main column of some brackets is nearly 1000 liters. In order to improve the loading efficiency, a working cycle in the general life test is only more than 10 seconds. Continuous pressurization and unloading in such a short period of time place extremely high demands on the hydraulic system. The existing loading circuit adopts the hydraulic station to supply liquid, and the pressurize...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of low pressurized loading and unloading efficiency and frequent failures caused by the large impact on the hydraulic components of the system during the life test of the existing internally loaded hydraulic support test bench, and to provide a The system is simple, can work continuously for a long time, has high control sensitivity, is easy to adjust and maintain, has automatic protection function, high pressure loading and unloading efficiency, and is suitable for various pressure tests.

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