The unique properties comparison between Towline cable and towing pulley cable power supply for Overhead Cranes

1. structure contrast:

Trolley uses cable pulley power supply mode:

The main parts include: bracket, cable, pulley, pulley track, conductive rack, in addition to steel wire and other accessories, the shape is complex, not beautiful.

The car power supply engineering:

The main components include the towline and cables, conductive frame, chain guide groove, simple structure, beautiful appearance, small impact on other parts layout, strong versatility.

2. manufacturing and warehousing comparison:

The power supply cable pulley structure is complex, many kinds of parts, the manufacturing process of complex conductive frame cannot be interchanged, bound to the scene, the size is not accurate, and easy to lose. The crane with different lifting weights has different pick up frames, and the same type of crane can not be interchanged. The stock is large. Engineering towline supply structure is simple and clear, easy to manufacture, 5 ~ 50t bridge crane only two types of chain, purchase convenient manufacturing, inventory is small, inventory turnover rate is high, only a chain guide, strong versatility, can be used as a standing stock with, convenient production plan. The performance by its own structure, pulley rail (steel) flatness poor installation, especially the seam height difference will affect the smooth passage of the block, in serious cases, will cause the death card pulley, conductive frame fracture or broken cable accident. Cable pulley is easy to be damaged during use, which seriously affects the operation of crane. The chain guide plate forming, bending steel plate with high strength, guide the side seam using lateral connecting plate is buckled, to ensure that the side seam wall smooth, not touch towline, towline supply stable operation, small noise. The cable is placed in the chain, which can effectively prevent cable wear, increase the service life of the cable. Engineering towline supply small size, convenient layout design, safe and stable operation, beautiful appearance.

3. installation:

With the span of 22.5m bridge crane as an example, the power supply cable pulley installation, cable slide wire rack assembly field fixed 68 U bolts and 85 ordinary bolts, railings require on-site welding, installation of complex, high labor intensity of workers. The cable is fixed on the pulley, wear line trouble, but also pay attention to the length of the cable sag, more complex, so the influence of artificial factors on the power supply cable pulley performance greatly. Power supply installation engineering towline, towline first guide slot to the girder on the cover, need about 26 bolts, convenient installation. The guide groove after the installation is completed, will be laid on the cable in the chain, then the chain installed in the guide groove, small labor intensity, the cable can be installed in the factory, reducing on-site installation.

4. use and maintenance:

Cable pulley power supply in operation, block easy to jam, easy to damage, maintenance frequency is higher. The cable will shake when the crane stops running. It may touch the steel structure of the crane and even hang the cable. The operation is unstable and the maintenance cost is high. The power supply operation engineering towline, towline towline in the guide of the movement through the guide groove design to ensure the smooth plane, there is no touch, safe and stable operation, the drag chain can guarantee 1 million times return, can do less maintenance or maintenance free, towline easy disassembly, easy to check, so the maintenance cost is low, reduce the user later utility cost