During the use of the single hydraulic prop, the prop will often be damaged due to the violation of the operating procedures by the staff. In order to improve economic benefits, save consumption, tap the potential inward, make better use of it, manage the single hydraulic prop, effectively control the roof and ensure safe production, the following work should be done.
The pressure test must be carried out one by one before the single hydraulic prop enters the well.
After long-distance transportation, loading and unloading, the single hydraulic prop is easy to cause seal eye damage, piston bending, cylinder depression and spring falling off. The test principle is that there shall be no pressure drop within 2 minutes, no leakage of the cylinder body within 4 hours, no jamming of the lifting column, and the limit device must be firm and reliable. The working face using single hydraulic prop must have a certain amount of backup support materials. Shandong Hanye machinery will test the product performance one by one when leaving the factory to provide high-quality safety protection.
After the mining of the coal face is completed or the use time exceeds 8 months, the ground must be removed and inspected.
Because the pillar will be damaged and invalid if it is not carefully maintained after being used for a period of time. Damaged and failed pillars shall be overhauled, and pressure test must be carried out after overhauling, otherwise safety accidents may be induced due to failure to meet the working characteristics. Therefore, all pillars transported to the well must be dismantled and cleaned to remove stolen goods such as coal dust; The movable column with corrosion and pitting shall be ground and polished.
After long-term use, the sealing ring of the three-way valve is aging and serious leakage. It must be disassembled, inspected and replaced. High and low voltage and voltage stabilizing tests shall be carried out for the pillars to be repaired. After passing the acceptance, they can continue to be used in the coal mining face.
