The shore container crane spreader is a special equipme […]
The shore container crane spreader is a special equipment for loading and unloading container ships at the dock. During the operation, the trolley with the spreader is transported along the main beam of the crane to the side of the water and land for loading and unloading. The trolley runs at a long distance.
In order to improve the loading and unloading efficiency, container spreader the trolley runs at a higher speed. When the trolley starts and brakes, the spreader and the hoisted container will oscillate in the running direction of the trolley, and the swing amplitude will vary with the running speed of the trolley and the braking deceleration. According to the test, when the running speed of the trolley reaches 180m/min or more, after the trolley brakes, the swing of the spreader and the suspended container can reach 2m, and it can be stopped after 30s swing. When the operation is carried out, the spreader needs to be aligned with the container, and the hoisted container needs to be aligned with the cargo space.
The longer the swinging time, the greater the influence on the loading and unloading efficiency. Therefore, a damper device must be added to the spreader. At present, the requirements for the performance of the lifting device of the crane spreader are: when the lifting height is 10m, the car runs at the rated speed and brakes for 10s, the swinging amplitude of the spreader should be controlled within 100mm. Here are a few practical spreader reduction devices.
The lifting load shall not exceed the limit working load of the spreader, twistlock Manufacturers and all the spreaders shall be visually inspected before use, and the ultimate working load shall be checked according to the lifting load.
The load on the chain increases with the angle between its branch and the plumb line. If the angle exceeds the limit value, it will cause partial overload of the chain. At the same time, the ultimate working load of the product cannot be used as the selected chain. The basis for hoisting aids or lifting hoisting ring chains. (If the angle exceeds the limit value, it can be solved by lifting the weight by lifting the beam or by raising the fishing spot.)