Views: 3 Author: Site Editor Publish Time: 2019-07-10 Origin: Site
The gantry cranes have different choices depending on the frequency of work in the working environment, the shape and weight of the materials being hoisted.
1. How to choose single beam and double beam gantry crane
Under normal circumstances, the lifting weight is below 50t and the span is within 35m. There is no special use requirement, and single main beam type should be used. If the door leg width is required, the working speed is high, or the heavy parts and long pieces are often lifted, the double-beam gantry crane should be selected.
2. How to choose span and cantilever length
Span is an important factor affecting the quality of the crane itself. In the selection, the span should be minimized under the premise of meeting the equipment usage conditions and meeting the span series standards.
3. How to determine the spacing size
At work, there should be a certain amount of space between the external dimensions of the gantry crane and the cargo and transport vehicle access of the yard to facilitate loading and unloading operations. When the general transport vehicle is loaded and unloaded within the span, it should maintain a distance of more than 0.7m from the door leg. When the spreader is not working, it should have a distance of more than 0.5m from the transport vehicle. When the cargo passes through the door, there should be a distance of 0.5m or more.
4. Three principles of track determination
1) It can meet the stability requirements of the gantry along the direction of the crane track;
2) The outer dimensions of the cargo should pass through the flat steel frame of the leg;
3) Pay attention to the proportional relationship between the wheelbase B and the span S, generally taking the wheelbase B=(14- -1/6) S.
5. How to choose the spreader
The most commonly used spreaders are hooks, others include lifting rings, lifting suction cups, clamps and lifting beams. Lifting suction cups, clamps and lifting beams can be used as long-term special spreaders on cranes. They can also be used as removable auxiliary spreaders on hooks for temporary use. They are often used in multi-stock warehouses and yards to improve Work efficiency. The spreader for grabbing bulk materials is generally a grab bucket that can be opened and closed, and can also be used to absorb magnetic materials such as metal chips. Hangers for lifting fluid materials are commonly used for holding barrels and hanging tanks. Generally, steel or chemical solutions are discharged by tilting or bottoming plugs, and by opening the bottom of the tank [unloading fluid materials such as concrete.