Quickly loading booster cylinder and high-flow safety valve test device using same

Abstract

The invention discloses a quickly loading booster cylinder and a high-flow safety valve test device using the same, which relate to the field of hydraulic bracket safety valves for mines and are invented for providing a practical test device for a high-flow safety valve. The quickly loading booster cylinder comprises a hydraulic cylinder (5), wherein an upper plunger (8) is arranged in the hydraulic cylinder (5) in a sliding manner; a lower plunger (9) is arranged in the upper plunger (8); a tested safety valve (1) is arranged at one end of the lower plunger (9); a liquid inlet (51) is formed in the cylinder wall of the hydraulic cylinder (5); and a control port (71) is formed at the cylinder bottom (7) of the hydraulic cylinder (5). The invention also discloses the high-flow safety valve test device. The quickly loading booster cylinder and the high-flow safety valve test device have short raising time of the output pressure and low resistance loss, are quickly started and are applied to the flow and dynamic performance test of the high-flow safety valve.

Description

technical field [0001] The invention relates to a mine hydraulic support safety valve, in particular to a fast-loading pressurized cylinder and a large-flow safety valve test device using the cylinder. Background technique [0002] At present, for the coal mining industry, with the continuous development of domestic fully-mechanized mining technology, the number of hydraulic supports with large mining height and high working resistance is increasing, and the flow rate of the safety valve of the supporting hydraulic support is also increasing. Now the flow rate of the safety valve has been increased. Up to 500L / min, 800L / min or even 1000L / min. When the hydraulic support is momentarily subjected to excessive pressure from the coal seam, the safety valve can overflow the liquid in the hydraulic support column to meet the needs of rapid unloading of the hydraulic support column and roof pressure protection, thereby avoiding major safety issues such as cylinder explosion. Accide...

AI Technical Summary

Problems solved by technology

For the first test device, in order to truly simulate the working environment of the tested safety valve 1, the reversing valve 12 used must have the characteristics of short output pressure rise time, small resistance loss, and rapid opening. The 500L / min safety valve test can barely meet the conditions, but for 1000L / min, 1500L / min, 3000L / min and other large flow safety valves, the liquid passing capacity and opening speed of the reversing valve 12 can no longer meet the above requirements

For the second test device, the loading speed of the pressurized cylinder 22 by the press 21 is relatively slow, and it is difficult to simulate the real working environment in which the tested safety valve 1 is quickly opened under the instantaneous huge pressure

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