Tower cranes are rotating cranes with booms mounted on top of high towers. The scope of work is large, mainly used for the vertical transportation of materials and installation of components in the construction of multi-story and high-rise buildings. It is composed of metal structure, working mechanism and electrical system. The metal structure includes the tower body, boom, base, attachment rod, etc. The working mechanism has four parts: lifting, amplitude changing, turning and walking. The electrical system includes motors, controllers, power distribution frames, interconnecting lines, signals and lighting devices.
So, when the tower crane runs out of operation, how to eliminate it? Let's find out!
1. The reasons for the failure of jacking up too slowly include: oil pump wear, reduced efficiency, insufficient fuel in the tank or clogged oil filter, severe wear of the manual reversing valve stem and valve hole, and leakage of the sealing oil damage of the cylinder rod Remedy: repair or replace bad parts, add enough oil, and clean the filter.
2. The causes of failure of jacking up or being unable to jack up are: serious internal leakage of the oil pump, the pressure setting of the relief valve is too low, the valve core of the manual directional valve is excessively worn, and the relief valve is stuck. Remedy: repair, replace and adjust according to the content.
3. The causes of noise vibration during jacking up are: the filter element is clogged. Remedy: clean the filter.
4. The reasons for the failure of the jacking system not working are: the steering of the motor does not match the rotation of the oil pump. Remedy: change the direction of the motor.
5. The causes of the vibration and crawling failure during jacking are: the air in the piston rod of the cylinder is not exhausted, and the guiding mechanism is faulty. Remedy: Repeatedly retracting and exhausting with no load.
6. The reasons for the failure of self-lowering after jacking up with load are: the lock valve on the cylinder head is malfunctioning. The fault should be eliminated.
Also note: the disassembly and assembly of the tower crane is the accident-prone stage. Safety accidents caused by improper disassembly and installation and unqualified installation quality account for a large proportion. The disassembly and assembly of the tower crane must be carried out by a qualified disassembly unit, and the installation and disassembly must be performed within the scope of the qualification. Disassembly and assembly personnel must undergo specialized business training, have certain experience in disassembly and assembly and hold a certificate, and at the same time, all types of workers must be complete, the positions are clear, and their duties should be clear, and they should follow the unified command.
