1. How to choose single-girder and double-girder gantry cranes

 

Generally speaking, the lifting quality of the crane is controlled below 50 tons, and the span of the crane is controlled within 35 meters. If there are no special instructions for use, we can choose a single-girder crane. But if there are requirements for the width of the door legs, for example, the width of the door legs should not be too small, but should be large, and the working speed should not be low, fast or high, or heavy items, large and long items need to be frequently lifted, then we can Choose a double-girder gantry crane.

 

 

2. Requirements for gantry crane span and jib length

 

 

 

3. Principles for determining the wheelbase of gantry cranes

 

 

 

③ It is necessary to make the span S and the wheel base B into a certain proportion. Generally, the wheel base is between one-quarter and one-sixth of the span.

 

 

When working, the operator should pay attention to a certain distance between the outside of the crane and cargo or other vehicles, leaving enough space to facilitate the loading and unloading of the crane. Sometimes the space needs to be larger. When the transport vehicle is working within the span, it is necessary to ensure that there is a distance of more than 0.7 meters between the transport vehicle and the door legs. When the transport vehicle is not working, the distance between the transport vehicle and the spreader can be smaller, more than half a meter. That's it. When hanging goods pass the door legs, a distance of more than half a meter must be maintained.

 

 

4. Conditions of use

 

Environmental conditions: The operating temperature is within the atmosphere of -25 degree ~+40 degree , the average temperature for 24 hours cannot be higher than +35 degree , and the altitude of the use location is not higher than 2000 meters. When the altitude is higher than 1000 meters, the motor capacity needs to be checked. calibration.

 

 

This equipment is used to transport materials and install and maintain equipment in fixed spans such as factories, power stations, warehouses, and stockyards. According to the purpose and retrieval device, it can be divided into the following types: Hook bridge crane is suitable for general loading, unloading and lifting transportation work in fixed spans indoors or outdoors in factories, mines, enterprise workshops, warehouses, etc. The common working level is generally A3~ A6.A3~A4 are suitable for equipment installation and maintenance, A5 is suitable for machining, metal structure, and assembly, and A6 is suitable for busy or often full-load working conditions. This crane is not suitable for lifting flammable and explosive dangerous goods or high-temperature liquid metals.

 

5. A brief introduction to gantry cranes

 

 

Gantry cranes have a wide range of applications and can be used indoors, outdoors, in factories, open spaces, docks and other places. Gantry cranes can be divided into three types, one is an ordinary gantry crane, and the other is a metallurgical-specific gantry crane.