A pressure self-buffering large flow safety valve test device

Abstract

The invention provides a large-flow safety valve test device with a pressure self-buffering function. The large-flow safety valve test device comprises a supporting frame, a fast loading pressure cylinder fixed to the supporting frame and an energy accumulator set connected with a cylinder body of the fast loading pressure cylinder through pipelines. The large-flow safety valve test device further comprises a self-buffering device, the self-buffering device comprises a buffering cylinder, a buffering base, buffering rods and springs, wherein one end of the buffering cylinder is in seal and sliding connection with an output cylinder of the fast loading pressure cylinder, and a tested safety valve is installed at the other end of the buffering cylinder; the buffering base is fixedly connected to the buffering cylinder and provided with through holes in the circumferential direction; one end of each buffering rod penetrates through the corresponding circumferential through hole of the buffering base and is fixed, and the other end of each buffering rod penetrates through an upper platform of the supporting frame and is fixed; the other end, stretching out of the upper platform, of each buffering rod is sleeved with the corresponding spring. The problem that the peak value of instantaneous impact pressure generated at the beginning of a test is large can be solved, and accuracy of test results is improved.

Description

technical field [0001] The invention relates to the field of coal mine support equipment testing, in particular to a pressure self-buffering large-flow safety valve testing device. Background technique [0002] The high-flow safety valve is the core component of overload protection to protect the hydraulic support from impact damage when the coal seam roof sinks. Its working state is a transient process, and it has the characteristics of short action time, high pressure, large flow, and strong dynamic characteristics. [0003] Before large-flow safety valves are used in coal mining work, safety performance inspections are required to ensure safe production in coal mines. At present, the large-flow safety valve test system generally uses accumulators (or accumulator groups) as the system loading power source, and uses fast-loading pressurized cylinders as actuators to detect and test large-flow safety valves. [0004] like figure 1 As shown, a large-flow safety valve test d...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems existing in the above-mentioned prior art, and in order to meet the needs of large-flow safety valve detection and inspection, it provides a large-flow safety valve test device with pressure self-buffering function, which can solve the problem of instantaneous impact pressure peak value generated at the beginning of the test. Large problems, improve the accuracy of test results, and protect the tested valve from damage

Images