Analysis of the category of Chongqing cylinders Before unloading the hydraulic cylinders in Chongqing, it should be prepared. The first is to relieve the pressure of the hydraulic circuit. Otherwise, when the oil pipe joint connected with the Chongqing cylinder is loosened, the low-pressure oil in the circuit will be sprayed agilely. When the hydraulic circuit is relieved, first loosen the hand wheel or pressure regulating screw at the overflow valve to relieve the pressure oil, then cut off the power supply or cut off the energy source to make the hydraulic installation stagnant.
1. Before and after unloading, try to invent conditions to avoid the parts of the hydraulic cylinder being cleaned by dust and impurities around. For example, when disassembling, try to carry out in a clean environment; after disassembly, all parts should be covered with plastic cloth, do not cover with cotton cloth or other tasks.
2. In order to avoid the tortuous or deformation of the lengthening parts such as the piston rod, the Chongqing pipe jacking machine uses the skid to support the balance when shelving. Avoid disassembly of the top thread of the piston rod, the port thread and the outer surface of the piston rod, the inner wall of the cylinder liner, etc. during disassembly.
3. The parts must be carefully cleaned before disassembly.
4. Chongqing cylinders should be carefully reviewed after disassembly to determine which parts can be inherited, which parts can be repaired and used, and which parts must be changed.
5. Disassembly should be carried out in order. Because the construction and size of the various hydraulic cylinders are not identical, the order of disassembly is slightly different. Individually, the oil in the two chambers of the Chongqing cylinder should be drained, then the cylinder head should be removed, and the piston and piston rod should be disassembled. When disassembling the cylinder head of the hydraulic cylinder, the special key is used for the key or the snap ring of the inner card type to prevent the use of the flat shovel; the flange type end cover must be screwed out, and the hammer or hard hoe is not allowed. . When the piston and the piston rod are difficult to extract, it is not allowed to be forced out. The cause should be identified first and then disassembled.
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