1. What are the advantages of double-girder bridge crane
1. Double-girder bridge crane equipment is the first honeycomb beam design, which has the characteristics of light weight and large load. , Features of strong wind resistance.
2. The unique steel pin connection is not only strong and reliable, but also has short assembly time.
3. The elastic rod legs and construction site steering can be disassembled into individual parts for easy transportation. Single girder crane usually refers to single girder overhead crane. The main beam of single-girder crane bridge mostly adopts I-shaped steel or a combined section of steel profile and steel plate. Lifting trolleys are often assembled with hand chain hoists, electric hoists or hoists as lifting mechanism components.
4. The minimum installed capacity solves the problem of electricity consumption for field construction. Single girder crane usually refers to single girder overhead crane. The main beam of single-girder crane bridge mostly adopts I-shaped steel or a combined section of steel profile and steel plate. Lifting trolleys are often assembled with hand chain hoists, electric hoists or hoists as lifting mechanism components.
2. Introduction to the safety inspection specifications of double-girder overhead crane
Safety inspection of double-girder overhead crane In order to ensure the safe operation of the overhead crane, it is necessary to Carry out some routine safety inspections. The inspection items and key points are as follows:
1. The lifting height limiter, travel limit switch and various interlocking mechanisms perform normally and are safe and reliable.
2. All major components meet safety requirements: the opening increase is less than 15% of the original size, the torsional deformation is less than 10%; the plate hook bushing wear is less than 50% of the original size, and the plate hook spindle is worn Less than 5%, no peeling, burrs, or welding repairs. There are no obvious defects in the hook hanger and pulley. The amount of wire wear and corrosion on the surface of the wire rope is less than 40% of the wire diameter, and the number of broken wires in one lay length is less than 10% of the total number of wires. There are no broken ends, no obvious thinning, no core protrusion, dead corner twisting, and extrusion deformation. , annealing, and burning phenomena. The clips, pressure plates, and wedges that connect and fix the ends of the wire rope are in good condition and are not loose. There are no less than 2 pressure plates and no less than 3 clips. The drum has no cracks, and the connection and fixation are not loose; the drum wall wear is less than 20% of the original wall thickness; the safety roll is no less than 2 turns, and the diameter ratio of the drum to the wire rope meets the requirements. The balance wheel is well fixed and the wire rope should meet the requirements. The brake has no cracks, looseness, or serious wear. The brake gap is of equal size on both sides and has sufficient braking force. The wear of the brake band is less than 50% of the original thickness.
Routine safety inspections of double-girder bridge cranes have played a significant role in preventing personal accidents, reducing equipment accidents, improving equipment operation rates, and reducing maintenance costs.
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