Research On Performance Test Rig For Coal Mine Hydraulic Support Valve

Hydraulic support is an important device which is applied to complete stated working flow and protect coal face and workers in coal mine. With the fast development of coal industry, more and more high pressure and mass flow valves are used on hydraulic support. Effective means detecting the performance of valves is scarce at home, which could bring great hidden danger to safety in coal mine. The research on performance of test rig for hydraulic support valve is very meaningful in detecting the performance of high pressure and mass flow valves at home, ensureing the quality of valve on hydraulic support and enhancing the security of coal mining.Some problems and deficiencies of the unfinished test rig are analyzed from two parts of software and hardware respectly. And the performance of test rig for hydraulic support valve is improved. The main research contents are as follows:The memory space of sample data is dynamically allocated to resolve the problem of sampling saturation. The real-time sampling method combining high precision counter with single value breaks through programming mode of real-time mass data sampling which is provided by Advantech ActiveX User'Manual.According to the actual situation of testing system, a new method applied to scaling data with linear interpolation is put forward, i.e reference search method. It improves the efficiency of searching data and lay foundation for real-time acquisition with high precision.Database technology is adopted to manage bottom data. Access plays the role of background database. And DAO is used for linking database and programming, which enhances organization and operation of bottom data.To remove the existed dead center in transmission mechanism, the working trait of transmission mechanism is analyzed. The feasibility of improved mechanism is ensured by checking moment. Besides, the control circuit of the reversing test is also improved to enhance the control ability of the computer to the reversing test.All test items are completed to prove the feasibility of test rig. Take some representative test items for example, test measures are introduced and test results are analyzed. It is indicated that the test rig could meet the testing requirement which is recorded by the valves testing standard drafted by previous Coal Department.