If you have enough knowledge about a product, he can better perform its functions, and when problems arise, they can solve them in a short time without delaying the quality of work.
The single hydraulic prop for mining is a hydraulic acrow props with external resistance. It can be used as a main column or cooperate with various top beams. It can be used for other temporary support, and can also be used for roof support of blasting mining face.
1 .The suspension hydraulic prop are separated into stand, jack, and close-by pendulum surfaces. The following defects are polished with oil: the depth of axial scratches is less than 0.2mm, and the length is less than 50mm; the depth of radial scratches is less than 0.3mm, and the length is less than 1/ of the circumference. 3; The area of minor scratches is less than 50 square millimeters; there are no more than two scratches on the same circumference, and no more than two scratches; the coating appears slightly rusted, and the overall area is not more than three, and each area is not more than 25 square millimeters.
⒉. The surface roughness Ra of the inner hole of the piston rod cylinder of the hydraulic acrow props shall not be greater than 0.4 microns, and the surface roughness Ra shall not be greater than 0.8 microns.
3. The pipe joints of hydraulic acrow props must not be deformed, the cylinder body must not have cracks, and the connecting parts such as threads and ring grooves at the end of the cylinder body should be complete.
4. The cylinder body of the single hydraulic prop does not match the surface without burrs, the scratch depth does not exceed 1mm, and the wear and impact area does not exceed 2 square centimeters.
5. After the piston rod and cylinder of the suspension hydraulic prop are repaired, they should meet the requirements of the above specifications, and the painting should meet the technical requirements of the manufacturer. There is no chemical reaction in the repair of the piston rod, cylinder and seal.
6. The double-row repair and expansion of the bottom valve used by the single hydraulic prop, you must pay attention to check whether the seal of the bottom valve is normal, whether the filter needs to be replaced, whether there is a problem with the spring, whether there is friction, and then repair it after confirmation.
