What Cables Are Equipped With Double Girder Bridge Cranes?

What Cables are Equipped with Double Girder Bridge Cranes?

Double-girder bridge crane is mainly composed of bridge frame, trolley operating mechanism, trolley, electrical equipment, etc. According to the frequency of use, it is divided into three working levels: A5, A6 and A7. All movements and controls of the hook overhead crane are completed within the driver's seat. Main parameters of double girder bridge crane:

1. Lifting capacity: 5 to 10 tons, 16/3.2 to 50/10 tons, 75/20 to 100/20 tons, 100/32 tons, 125/30 to 250/50 tons, 300/40 tons, 350/75 tons , 400/80 tons, 600/150 tons

2. Span: 10.5~31.5 meters, 13~31 meters.

3. Lifting height: 6~22 meters.

The cable part of the bridge crane plays a vital role in the operation of the bridge crane equipment. The quality of cable operation directly affects whether the crane can operate normally. The trolley mechanism and the lifting mechanism are both powered by cable transmission, so the cable plays a role as a link in the operation of the crane. If you use too much cable, you will waste money. If the cable is burned, it may even cause a safety accident. So how to choose the right cable?

The cable size of a double-girder bridge crane is determined by the current, which is related to the voltage and total power of the double-girder bridge crane. For example, the main power supply of a 5-ton double-girder bridge crane is generated by two crane motors, a trolley motor and a lifting motor. The total power of the double-girder bridge machine can be calculated as 9.9kw. The voltage used is 380V, so the current of the cable can be calculated as 26 amps according to the formula: power = voltage * current. The current that a square copper core cable can pass is about 7 amps, so 4 square cables will satisfy 26 amps. It can be seen that we need to understand the power, voltage, current-carrying capacity of the cable and the speed of the dual-motor double-girder bridge crane.

In addition, the selection of cables should consider the big brands on the market. Some small factories cut corners when producing cables, which shows that there are no 4 square meters of cable in 4 square meters. The copper core of qualified copper wire should be purple-red, shiny and soft. However, fake and inferior copper core wires are purple-black, light yellow or white, have many impurities, have poor mechanical strength and poor durability. They will break with a little force, and the wires often break. To check, just peel off 2 centimeters from one end of the wire and rub a piece of white paper on the copper core. If there is black substance on the white paper, it means there are more impurities in the copper core. In addition, the insulation layer on the fake wires seems to be very thick. In fact, they are mostly made from recyclable plastic. Over time, the insulation will age and leak electricity.

If the power supply cable of the double-girder bridge crane is improperly selected, it may cause a safety accident. A cable may be small, but it has a big responsibility. Many fires are caused by aging electrical wiring, improper equipment, or poor quality wiring. Therefore, users must be clear-eyed and identify carefully when selecting, so as to nip problems in the bud.