Bridge cranes are the most extensive and numerous lifting and lifting equipment over warehouses, workshops and fuel farms. Here is a description of their common operational norms:
A person who has passed the test and holds an equipment operator's certificate shall be allowed to operate. Operators need to comply strictly with the relevant safety, shift, etc。
(b) checks whether various transmission devices, manipulators, large and small vehicles, rollers, hooks, sliders, wire ropes, etc., have been worn or damaged, and on the crane tracks and on both sides - it is prohibited to park any objects within metres. The foundations and orbits of the super-heavy should be checked after the rain。
3. Check the integrity of signal bells, signal lights and lighting equipment, test elevation and walk limit switches, and the sensitivity and reliability of brake movements。
When the hook is placed at a minimum position, the wire rope shall have at least two laps on the cylinder. The use of corrosive corrosiveness exceeding 40 per cent of the surface wire diameter, the flaming and crushing transformation, the breaking of a share, or the breaking of a root within a distance exceeding 5 per cent of the periphery wire shall be prohibited when 10 per cent of the periphery is rounded。
At the time of the operation, the driver was under the command of only one person. Drivers and commanders shall have visible sign signals or sound signals. Drivers should respond to sound signals before execution. In the event of danger or failure of a crane, the vehicle shall be stopped immediately, regardless of the person from whom the signal is sent。
Champ - twin beam bridge crane (16 tons loaded)
6. The first suspension shall be carried out on a test basis, and when the heavy matter is hanged from the ground at 200 mm, the brake test shall be performed and the suspension shall be confirmed to be in good condition. During the course of the movement, the lifting weight is greater than 0. 5 metres above all objects during the journey。
7. Lifters should be up and down, start and stop slowly, and it is prohibited to suddenly change direction in operation. When large and small vehicles are running close to the end, the slowest speed is applied. Limiters are prohibited as a means of stopping operations。
8. In the event of a power outage, a significant decrease in voltage or a failure of equipment, all controllers shall be moved to zero and the power switch shall be activated immediately if the legs on both sides are not synchronized when moving. Where heavy matter is in a hanger position, measures should be taken to slow it down。
9. Work in sand or other things is prohibited if it is slashed or hanged. Ten or two overweight aircraft shall travel at a distance of more than three metres in the same orbit。
11. The wire rope shall be regularly inspected and coated every 15 days, before which oil stains on the wire rope shall be removed and lubricated to about 60°c in order to induce the lubricant to fall into the gap of the rope。
After work, the hook shall be lifted and the car shall be parked at the end of the driver's room and the crane shall be opened at a designated location and the orbit shall be tightened with a clamp. Check, clean and perform routine maintenance work, place handles (switches) in blank space (zero bits), turn on the power switch and lock the driver's room to a clean, clean and secure environment。
The above-mentioned operational specifications are drawn from the experience of previous generations, whose text is merely theoretical and whose true security norms need to be put into practice. Prior to, during and after construction operations, safety should be given priority, vigilance should be raised and accidents should be reduced。
