Maintenance and construction plan of electric single beam suspension crane
In order for the installation of the electric single-beam suspension crane to proceed smoothly, so that the crane will be in a safe and orderly working state during the installation process, and the construction must be carried out in a planned, organized, and step-by-step manner, so that every operator To be aware and handy, the following construction plans are specially formulated:
1. Installation overview of electric single beam suspension crane
The lifting weight of this machine is Q=3 tons, the span is L=13.5 meters, the lifting height is H=9 meters, and the cart running speed is 20 meters/min.
2. Preparation before installation
(1) Selection of installation site
The area of the installation site should be sufficient to meet the needs of the installation flip and hoist, and the site should have a power source for the welding machine and other electric tools.
(2) Preparation of equipment and tools
This construction period requires 2 welding machines, 2 sets of oxygen and acetylene, 2 sets of chain hoists, wooden ladders, spreaders and cranes, provided by Party A.
(3) Preparation of materials
The steel rails, pressure plates, splints, bolts, plates used for making car gears, materials and welding rods for sliding wires used in this project should be prepared in sufficient quantities according to actual needs.
(4) Staff arrangement
Personnel participating in the project: 2 electricians, 2 fitters, 2 welders, 2 crane workers, and 1 safety officer.
3. Basic safety requirements during installation
The construction personnel participating in this phase of the project strictly abide by the safety operation regulations of each type of work, and illegal operations are strictly prohibited.
Fourth, the installation process
(1) Track installation: *Clean up the site first, and carry out inspection and acceptance on the crane cement bearing the rail and beam foundation. Leveling and laying line. Rail inspection and straightening, rail upper position, connection of rail joints, alignment and reinforcement, measurement inspection, leveling and straightening. Car gear system for installation, the track installation standard must comply with TJ231-78 "Mechanical Equipment Installation Engineering Construction Acceptance Specification", the difference between the *high point and *low point of the full stroke is not more than 10mm, and the left, right and top of the joint The offset on three sides should not be greater than 1mm, the joint gap should not be greater than 2mm, the span deviation should not be greater than 5mm, the relative difference between the elevations of the two parallel tracks on the same span, should not be greater than 10mm at the column, and should not be greater than 15mm at other places.
(2) Installation of sliding wire
The contact surface of the slip line should be flat, straight, free of rust, good electrical conductivity, and properly installed. Compensation devices should be installed when crossing the expansion joint of the building. The power supply slide line is painted with red paint on the non-conductive contact surface, and an * mark or an indicator light indicating live electricity is installed in the appropriate position. For example, when installing a sliding cable, it should be straight and conductive. For example, when a flexible cable is used for power supply, the number of the cable should meet the requirements, and a traction rope should be provided.
(3) Bridge installation and erection of crane
Before installation, unpack the box together with the representatives of the entrusted installation unit and manufacturing unit, and check and check whether the delivered goods are consistent with the number of parts listed in the packing list according to the random packing, and whether the random documents are complete*, and the verification is completed After that, a record was made and the representatives of the three parties signed on the spot. The construction personnel involved in the assembly and erection of the bridge strictly abide by the safety and operating procedures of each type of work, and violations of regulations are strictly prohibited.
When assembling the crane, put the bridge frame on the cushion frame according to the working position, and fix it firmly, then assemble the end beam, and measure the diagonal difference, which should not be greater than 5mm, and the span should not be greater than 3mm. Assemble the electric hoist, the running clearance of the trolley should not be greater than 5mm, and then assemble the control room.
(4) Electrical installation
Before installation, you should be familiar with electrical schematic diagrams, wiring diagrams, electrical general diagrams and related technical data, and understand the operating principles and the functions of each component. In order to ensure the installation and quickly deal with the problems arising during the installation process. Check that the ground resistance of each electrical component and motor should not be less than 0.8 megohm. In a humid environment, it should be no less than 0.4 megohm. Check whether the lines are correct and confirm that there is no error rate before powering on for trial operation. During trial operation, check whether the operating directions are consistent, whether the travel switch meets the required direction, and whether the upper and lower power-off limiters are installed*. All safety devices must be installed and qualified before they can be hoisted and erected. During the hoisting process, strictly abide by the safety operation rules and strictly prohibit illegal operations.
5. The live shell and wire tubes of the crane should be grounded, and the grounding resistance of the crane track and any point on the crane should not be greater than 4 ohms. The repeated grounding resistance is not more than 10 ohms. The insulation resistance of the main circuit and control circuit to the ground shall not be less than 0.8 megohm.
6. After the crane is qualified for trial operation, it shall be subjected to no-load test, static load test, and dynamic load test. After passing the self-inspection, carefully fill in the completion report, notify Party A, organize the acceptance by the relevant departments, and deliver it to use after passing the test.