Hydraulic acrow props are relatively common machinery and equipment in mining production today, and they are the key equipment provided by the company for market production.
Hydraulic acrow prop
In the practice of a hydraulic acrow prop, because the two chambers of the oil cylinder constitute a void communication, the pressure oil in the oil chamber cavity tends to move from the high-pressure area to the low-pressure area. As soon as the activity occurs, the pressure P in the cavity decreases and P is not added. If the thrust F at both ends is not> F, the piston loses its balance and moves to the cavity with the rod to find a new balance point. This reciprocation, the piston has always moved to the outside force to stop talent interruption. Because it is an internal leak, the miner cannot detect it with the naked eye. Therefore, the internal leak is an uncontrollable hidden danger, so it has caused a lot of roof accidents. Inspecting all the hydraulic acrow prop control elements, especially the speed control elements, found no problems. Some speed regulators were replaced, and the defects have not been eliminated. After disassembling the oil cylinder, it was found that the piston "O" seal was severely worn, which caused the hydraulic oil in the two chambers of the oil cylinder to channel each other. Analyze the factors, because after the "O" -shaped seal wears, the cylinder cavity with and without rod cavity will increase the communication. When the speed regulating valve 3 or the shut-off valve 2 is closed, it is equivalent to shut off the oil return from the cylinder road.
A simple grasp of the basic stability production techniques of the above-mentioned hydraulic acrow prop can help the market provide more complete hydraulic acrow prop products, thereby ensuring the demand for mining production
