The specific quality standards for the acceptance and installation of electric hoist are as follows:
- The equipment and equipment used by the electric chain hoist shall comply with the current national standards and shall have the equipment nameplate.
- The electric chain hoist is packaged intact, and the seals should be well sealed.
- Unpacking and checking the specifications and quantities should meet the design requirements, and accessories and spare parts should be complete.
- The technical documents of the electric chain hoist should be complete, and the visual inspection should be free of damage, deformation, and corrosion.
- The installation of the slings and free suspension cables of flexible cables should meet the requirements.
- The mechanical strength of the terminal fixing device and the tensioning device should meet the requirements, and the maximum tension should be greater than the maximum tension of the sliding line or the sling.
- When the length of the trolley wire and the sling is less than or equal to 25m, the adjustment margin of the terminal tensioning device should not be less than 0.2m.
- The slack of the trolley wire or sling should be selected according to the material specifications and the installation environment temperature, and the slack deviation of the trolley wire should not be greater than 20 mm.
- The cable head of the suspension device should be reliably fixed with the flexible cable, and the distance between the cable heads should not be greater than 5m.
- Except for the weak current system, the wiring on the crane adopts copper core multi-strand wires or cables with a rated voltage of not less than 500V, and the cross-sectional area of the multi-strand wires shall not be less than 2.5 square meters. The cross-sectional area of the multi-strand cable shall not be less than 1.5 square meters.
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