Technical Operating Rules For Stockyard Gantry Cranes

Technical Operating Rules For Stockyard Gantry Cranes
 

1. The working site of the 15 ton gantry crane should be flat and solid, and the endurance of the foundation should be checked to see if it meets the specified requirements. Operators should be familiar with the working environment, check the working area of the machine, whether there are obstacles in the turning space and other unsafe factors.
 

2. Before working on a 15 ton gantry crane, carefully check whether the components, limit switches, safety devices, and braking performance are sensitive, and conduct a test run with no load to confirm that it is normal before proceeding to work.
 

3. Before the hoisting operation, the operator should understand the hoisting operation plan and related issues, and unify their thinking with the commander. The operator must cooperate closely with the commander and operate in strict accordance with the signals sent by the commander. If the command signal is found to be unclear or wrong, it has the right to refuse to execute it. You should also pay attention to the danger signals sent by other personnel. Before the crane moves, the whistle should be given as a warning.
 

4. It is strictly forbidden to overload the 15 ton gantry crane, tilt it and pull it. Lifting is not allowed if the weight of the hoisted object is unclear. It is strictly forbidden to lift objects buried underground or fixed on the ground or equipment.
 

5. During the operation, no one is allowed under the lifting weight, and no one is allowed to stand under the boom.
 

6. It is strictly forbidden to carry people on the hook of the 15 ton gantry crane, and it is strictly forbidden to carry people on the lifting object.
 

7. When the crane is running, it is strictly forbidden for personnel to carry out maintenance and adjustment work.
 

8. When lifting heavy objects, they should be tied firmly. Stacking or hanging odds and ends on top of heavy objects is prohibited. Pay attention to the ground conditions when placing heavy objects to prevent tilting. Sporadic materials and items must be hoisted with a cage or tied firmly with ropes. Safety measures must be taken when hoisting inflammable, explosive and other dangerous goods.
 

9. When a 15 ton gantry crane lifts a heavy object, the center of the hook should pass through the center of gravity of the heavy object vertically. Carry out trial lifting first, stop and check when the heavy object is lifted 200 mm from the ground; the stability of the crane, the reliability of the brake, the balance of the heavy object, and the firmness of the binding. When lifting heavy loads, try to avoid lowering the boom. When it must be lowered, put down the heavy object first, and then lower the boom.
 

10. If two machines are used for hoisting, the booms of the two vehicles should keep a certain distance (to prevent the head of the poles from colliding and the center of gravity of the hoisting from being biased). There is a special person to command and the speed should be slow, so that the movements are closely coordinated and coordinated. The heavy object should not exceed 75% of the total rated lifting capacity of the two cranes, and the load borne by each crane should not exceed 80% of its rated lifting capacity.
 

11. When lifting and turning heavy objects, the speed should be uniform and the movement should be smooth. When heavy objects fall, they must be handled at low speed and gently. Sudden braking is prohibited. Carved heavy objects are prohibited from falling freely. When working, pay close attention to the action status of the hook and wire rope to let go of the roll back rod and so on.
 

12. Reverse action is not allowed before turning or the landing bar is stopped. It is strictly forbidden to use the method of playing against the car to achieve the purpose of braking.
 

13. During hoisting operations, in case of emergency, necessary measures should be taken in time.
 

14. During operation, the maximum elevation angle of the boom must not exceed the original factory regulations. If there is no information to check, it is advisable to exceed 75 degrees at the maximum. When lifting heavy objects in a certain range, if the rated total lifting capacity is exceeded, the turning speed should be slow. The jib is lifted and the elevation angle of the boom is very large. When unloading, the heavy object should be placed on the ground first, and the wire rope should be kept tight, and the boom should be lowered before unhooking. Try not to use 30 except in special cases. the following angles.
 

15. When the 15 ton gantry crane is stopped or resting, the heavy objects should be dropped to the ground, and the heavy objects should not be hung on the hook.
 

16. When working in rainy and snowy weather, in order to prevent the brake from becoming damp and ineffective, special emphasis should be placed on trial lifting to prove that the brake is reliable before working. It is slower to drop the hook in rainy and snowy days.
 

17. When working outdoors, when heavy rain, heavy fog, and strong winds of level 6 and above affect safety, the operation should be stopped.
 

18. The 15 ton gantry crane should keep a certain safe distance from the overhead wires, as shown in the table below. (Special circumstances increase the distance)
 

19. The specifications and strength of the steel wire rope must meet the requirements of the 15 ton gantry crane in the stockyard. The steel rope should be arranged neatly on the drum, and the height of the tight steel rope on the drum should be lower than the outer circumference of the drum end plate 5 mm, the wire rope operation center should be kept for at least three weeks. The rope should be threaded according to the specified ratio and direction.
 

20. Kinked and deformed wire ropes are not allowed. Strictly replace the steel rope in time according to the scrap standard.
 

21. Always check the firmness of the joints of the steel rope and the combination of the steel rope and the rope clamp. The side of the rope clamp with the nut and the pressure plate should be placed on the long side of the steel rope to avoid loosening.
 

22. For steel rope joints used for lifting, clips are not allowed, and sickle buckles must be used (inserted)