Failures that may occur during the operation and support of the hydraulic prop include: low setting force, over-limit work resistance, inability to push and slide straight, and delay in moving the frame; poor management of the top plank, empty top, falling frame, etc. There are manufacturers of single hydraulic prop for everyone to sort out.
The hydraulic acrow props setting force of the bracket is directly related to the sinking of the control finger board and the management board, so sufficient setting force must be ensured.
The low hydraulic acrow props setting force is mainly caused by insufficient pressure of the emulsion as the power of the support or leakage of the hydraulic system; the short operating time of the operating valve is also a reason.
The measures to ensure sufficient setting force are: the pressure of the emulsion pumping station must be maintained within the rated working pressure range, and the pressure change of the emulsion pumping station must be observed at any time, and the pressure should be adjusted in time; the hydraulic system should not leak, and the pipeline pressure should be reduced as much as possible Loss; after the operation of the column operation valve is in place, it is recommended to stay for a while, but the excessive setting force is not good for some board management.
The hydraulic prop working resistance of the bracket is too eye-catching, which is disadvantageous to the bracket components and hydraulic components, and even causes damage.
The main reasons for the working resistance of the hydraulic prop exceeding the limit: the safety valve is over-adjusted, exceeding the required rated working pressure; the safety valve fails, and the safety valve does not open to discharge but continues to bear the increased resistance pressure, causing the working resistance to exceed the limit; the mine pressure is more serious than expected Too big.
The method to prevent the working resistance of the hydraulic prop from exceeding the limit is: to the working pressure of the safety valve, especially the safety valve that has not been used for a long time; the first mining face must closely observe the mine pressure, and take certain measures as much as possible when the first pressure is applied.
