If you have enough knowledge about a product, he can better perform their functions, and when problems arise, they can solve them in a short time without delaying the quality of single hydraulic prop work.
The single hydraulic prop for mining is an external constant resistance hydraulic prop. 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 following defects are allowed to be polished with oilstone on the surface of the suspension hydraulic prop, jack, and seal ring: the depth of the axial score is less than 1.2m, and the length is less than 50mn; the depth of the engraved tiger gauge is less than 1.3m, and the length is less than 1/3 of the circumference; slight The area of dynamic injury is 50 square millimeters; there are two machine marks from time to time in the same country, and no more than two scratches; the plating layer is slightly rusted, and the overall area does not exceed three, and each area does not exceed 25 square millimeters.
2. The surface roughness Ra of the bore of the piston rod cylinder should not be greater than 0.4 microns, and the surface roughness Ra should not be greater than 0.8 microns.
3. The pipe joints must not be deformed, the cylinder body must not be cracked, and the connecting parts such as the thread and ring groove at the end of the cylinder body should be complete.
4. The cylinder body 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 body are repaired, they should meet the requirements of the above specifications, and the painting should meet the manufacturer's technical requirements. There is no chemical reaction when repairing the piston rod, cylinder body and seal.
6. The double-row repair and expansion of the bottom valve used by the suspension hydraulic prop 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 repair after confirmation.
