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1, tower machine overhaul and maintenance of the work content

1.1 daily overhaul and maintenance of tower machinery and equipment

First, check the tower machine's various safety facilities, if found to be out of order, to make timely adjustments. Second, do a good job of tower machine parts of the daily cleaning work, from time to time to check the tower machine parts of the normal operation, found that a part of the failure, must be timely maintenance. Third, often check the tower machine reducer on the breathable plug settings can be free to exhaust, if the occurrence of blockage, must be timely to dredge and organize. Fourth, check the tower gearbox, external gears and other parts of the lubrication, these parts must be in accordance with the requirements of the use of the table, regular refueling and coating, in the oil change to remove the box of iron filings, impurities, etc., refueling also need to pay attention to the cleanliness of the oil and the number of. Fifth, when installing, dismantling and adjusting the slewing mechanism, attention should be paid to ensure that the centerline of the planetary gear reducer of the slewing mechanism is parallel to the centerline of the gears, and its meshing surface is not less than 70%, and the meshing gap should be appropriate. Sixth, check the tower parts of the wire rope has no broken wire or loose strand phenomenon, if the number of broken off more than 5% or diameter wear more than 5% should be in accordance with safety standards, timely replacement of new wire rope. Seven, pay attention to check the use of the tower brake, if there is not sensitive to the situation, to be adjusted in a timely manner. Eight, often check the tower at the connection of the bolt, if there is loose or fall off the case occurs, to timely reinforcement and make up the security. Nine, pay attention to the metal structure, steel wire rope, electrical system, slewing support bearing device, hydraulic jacking system maintenance, do a good job of lightning grounding and protection of zero work, the emergence of brake parts that do not meet the safety standards, hooks, reels, pulleys, wheels, etc., to be scrapped.

1.2 Overhaul level division and overhaul content of the tower crane

Minor maintenance content: in the tower crane work time reaches one thousand hours after the minor maintenance, minor maintenance of the maintenance content has the following six points: ① do the daily maintenance of the tower crane work content; ② gears of the gear reducer to remove the overhaul, cleaning; ③ on the tooth side of the backlash cleaning and open drive gears adjusted to check and lubricate grease for the gears after adjusting; ④ slewing bearing device in a timely manner to check and repair, adjusted to an ideal state; ⑤ on the brake parts to adjust to the ideal state; ⑤ the tower crane to check and repair, adjusted to an ideal state; ⑤ the tower crane to check and repair, adjusted to an ideal state. Adjust the slewing bearing device to the ideal state; ⑤ Pay attention to the brake and safety device to check and adjust the maintenance; ⑥ Strengthen the checking of the wear and tear of the hooks, pulleys and wire ropes, and make certain adjustment, repair and replacement when necessary.

Repair content: in the tower working time of four thousand hours after the repair, repair the maintenance content of the repair has the following six points: ① first of all, in accordance with the requirements of the work of the small repair of the work of the inspection; ② if the couplings appear to be damaged parts; ③ brake pads are generally to be replaced, but also can be repaired; ④ steel wire rope, pulleys, and other tools for a relatively long period of time, it should be replaced; ⑤ slewing bearing part of the connecting part of the bolts, need to be checked and maintained The bolts of the slewing bearing part need to be inspected and maintained, and should be replaced in time if they are dislodged or damaged, and remember to use high-strength bolts when replacing them; (6) Rust removing and painting work should be started.

Overhaul content: crane after a long period of operation for overhaul, generally in the tower crane working time up to 80 eight thousand hours, the longest time should not exceed fifteen thousand hours, overhaul of the overhaul of the maintenance content are as follows: ① the same in accordance with into the small repair, repair the work requirements to carry out all the work; ② brake wheels, brakes, etc. need to be inspected, repaired, replaced; ③ reducer assembly needs to be repaired or replaced; ④ slewing bearing assembly needs to be repaired and replaced; ⑤ tower crane through overhaul factory, the tower crane should reach the product factory work performance, and hold the relevant inspection certificate.

If the tower crane is not used for a long time, it is necessary to do lubrication work, anticorrosion work and anti-rainwater corrosion treatment for all parts of the tower crane, and keep an annual inspection and maintenance of the tower crane. In different cases of repair, without the permission of the manufacturer, can not use any substitute parts or substitute materials, strictly prohibit the tower repair unit of the tower machine for their own modification.

2, the tower machine overhaul and maintenance mechanism of construction

2.1 tower machine repair and maintenance mechanism, first of all, must develop a clear tower machine use, repair and maintenance of the regulations

First, the construction engineering team of the tower machine on the use of the statute, it must be provided for a fixed number of people and machines, on duty operation must be licensed on time; in accordance with the provisions of the tower machine and the operating regulations and instructions for the operation of the tower machine to pay attention to the use of the tower machine love and care and strict. Second, in the daily maintenance of the tower machine, to do a good job on the daily inspection and maintenance records, fill in the tower machine operation effect records; Third, the tower machine daily inspection of the problem, specific problems and specific analysis, can be adjusted by simple can be dealt with by the operator, if the problem is larger should be timely shut down for maintenance, do a good job of the maintenance records of the tower machine.

2.2 Do a good job of tower transfer, installation, dismantling, acceptance, scrapping of the five work, the formation of the integration model

First, the transfer of tower crane, should be equipment department equipment section in accordance with the provisions, issued after the transfer order can be implemented. Second, the installation of tower crane, specifically refers to the material hoist, tower crane, construction elevator installation and other work content, these jobs should be organized by the equipment section, develop the installation program and implementation. Third, the tower machine dismantling roar, after inspection, refurbishment, maintenance and temporary installation, should be properly stacked, storage, to avoid water immersion, corrosion. Fourth, the acceptance of the tower machine, by the equipment section, the safety section to carry out joint acceptance of the work to ensure that the tower machine is intact. Fifth, if the tower used on the construction site in the use of more than the specified age, or due to quality problems and can no longer be used, it should be used by the relevant units or maintenance departments using the form of a written application, through the equipment section of the identification of the tower, and then the results of the appraisal report to the general manager, get permission to apply for the scrapping of the tower.

2.3 Establishment of tower machine overhaul and maintenance management system, rationalize staffing and institutional management

First, the construction team management, according to the management of apparatus and equipment both to facilitate the production, but also must be fully rational use of machinery and equipment and equipment to play the investment effect of the principle, we are currently the implementation of machinery and equipment directly transferred to the project manager, and then by the company's equipment department for the unified scheduling of the management mechanism, which includes apparatus and equipment management, including tower crane leasing and transfer of work. Secondly, according to the principle of hierarchical management of engineering construction by upper and lower levels of leadership, under the unified leadership and command of the company manager, the Department of Equipment needs to be responsible for the management, repair and maintenance of machinery and equipment within the scope of the company, and the evaluation work should be carried out at the same time with the inspection and evaluation of the Safety Section, so as to minimize the procedural time delay. Third, specializing in the establishment of tower machine repair and maintenance management team, the equipment department and operators constitute the team members, give full play to the role of the tower machine, so that timely detection of problems, solve problems, maintenance of the tower machine, to extend its service life.

3、Summary

In the tower use process, to do to strengthen the tower installation and dismantling management, the establishment of the tower unit technical files, adhere to the licensing system, to ensure safe operation, command, found that the problem should be dealt with in a timely manner, in strict accordance with the tower instruction manuals marked parameters of the operation. In the tower machine repair and maintenance mechanism of the construction work, only in accordance with the above aspects of the work of the serious implementation, in order to better and faster improve the construction industry in China tower machine repair and maintenance mechanism.