Huai'an Crane Rental Company Xinyu Dajian can rent all kinds of large cranes. To make Crane rental After that, customers can use the crane for a longer time. We need to carry out regular maintenance on the crane to ensure the normal use of large cranes.
large Crane rental The crane oil tank shall be cleaned with an easy drying cleaning solvent, and then the solvent residue shall be removed with filtered air. Clean all pipelines of the system, and in some cases, impregnate the pipelines and joints. Install an oil filter in the pipeline to protect the oil supply pipeline and pressure pipeline of the valve. Install a flushing plate on the collector to replace the precision valve, such as electro-hydraulic servo valve. Check whether all pipelines are properly sized and connected. Regularly flush the inlet oil filter of the oil pump. Check whether the hydraulic oil is acidified or polluted by other pollutants. The smell of the hydraulic oil can roughly identify whether it is deteriorated.
It is necessary to ensure that no foreign particles enter the oil tank from the ventilation cap of the crane oil tank, the plug seat of the oil filter, the sealing gasket of the return line and other openings of the oil tank. Check whether the nut, cotter pin and locating plate on the brake are complete and loose, whether the lever and spring are free of cracks, whether the pin and washer on the brake wheel are loose and complete, and whether the brake is reliable. When the brake is opened, the opening of the brake pad shall be less than 1.0mm, the distance between both sides of the brake wheel shall be equal, and each axle pin shall not be stuck. Check whether the safety protection switch and limit switch are positioned accurately and operated flexibly and reliably, especially whether the rising limit is reliable. Check whether the winding of the wire rope on the drum and pulley is normal, whether there is notching, notching, knotting, twisting, etc., whether the bolts of the wire rope pressing plate are tightened, and whether there is a double nut loosening protection device.
Check monthly that the wear of the brake pad liner does not exceed 2mm, and the contact area between the liner and the brake wheel should not be less than 70%; Check the wear and lubrication of the fixing device and each pin shaft. The wear of each pin shaft shall not exceed 5%. The wear of the original diameter, small shaft and mandrel shall not exceed 5% of the original diameter, and the ovality shall not be less than 0%. 5mm。 Check the wire rope for wear, wire breakage, and lubrication. Check whether the hook has cracks, whether the wear of its dangerous parts exceeds 5% of the original thickness, whether the locking device of the hook nut is complete, and whether the parts on the hook assembly are complete and reliable. The hook shall rotate flexibly without obstacles.
Check all bolts for looseness and shortage. As the main stress zone of portal crane is easy to be damaged due to stress concentration, it is necessary to conduct a detailed inspection of the main stress zone of portal crane, focusing on the connection part between the outrigger and the main beam, angle bearing, etc. The bottom beam part, the connection part between the support leg and the beam, etc. In addition, because metal components are often exposed to the outdoors, rust removal and painting are carried out every year, which can effectively extend the service life of metal components. At the same time, if the corrosion degree of metal components reaches 10%, waste disposal is required. When the span of the main beam reaches 1%, it can be repaired on a trial basis. If it cannot be repaired, it will be scrapped.
