1.Introduction of OVERHEAD CRANE
Overhead crane is a kind of heavy mechanical equipment, belongs to the special equipment, has the corresponding international standard (ISO9001). It is generally installed indoors (e.g. in factory workshops and warehouses) to carry out vertical lifting of goods to assist daily production work: lifting the goods from the ground to the height, and then transporting them to the designated location and putting them down.
The bridge crane consists of 5 main parts: main girder, end girder, electric hoist (trolley), rail and control system.
2.How to choose the right bridge crane for your use
Under the premise of determining that the bridge crane is the only solution, first consider whether to choose single girder or double girder structure according to the comprehensive consideration of the working environment, then determine the working level of the crane according to the frequency of use, and finally determine the brand of the corresponding important components (motors, gearboxes, electrical components, etc.) according to the price of the crane provided by the supplier.
| Crane Type | Hoisting Mechanism | Reference lifting capacity | Working Class | Standard Height | Span |
| Single Girder Overhead Crane | Electric Hoist | 3ton~10ton | A3~A5 | 6m、9m、 12m、15m、18m |
7.5m~22.5m |
| Double Girder Overhead Crane | Electric Hoist | 3ton~20ton | A3~A5 | 6m、9m、 12m、15m、18m |
10.5m~25.5m |
| Double Girder Overhead Crane | Winch Trolley | 20ton~500ton | A3~A8 | 6m、9m、 12m、15m、18m |
10.5m~40m |
3. Classification of bridge cranes
Bridge cranes are generally categorized into single girder bridge and double girder bridge cranes. The lifting mechanism of single girder crane is electric hoist, and the lifting mechanism of double girder crane is divided into electric hoist and winch trolley according to the usage frequency.
4. Different configurations of the overhead crane use feeling
Due to different configurations, there is a huge price difference between overhead cranes in the market. Based on years of experience, we believe that the factors affecting the price of overhead cranes are the structure of the main beam and the brand of the motor, reducer, inverter and electrical components.
♦ Older cranes are also known as traditional cranes (A3) are generally not equipped with frequency converters, so the use of the process is also very loud, and the motor and other accessories are made in China, the subsequent maintenance of the accessories can only be purchased from China, but after all, after decades of market verification, the quality of the quality of many small and medium-sized enterprises in China is also recognized.
♦ Have to say is the European bridge crane (A5), frequency control of the European crane is one of the most obvious characteristics of the quiet, because of the selection of the European main beam, Yaskawa frequency converter and SEW geared motors, whether in the use of the feeling or after-sales maintenance is a big difference with the A3, the only drawback is the price is expensive.
5. Upgraded version of double girder bridge crane(bar manipulator)
In recent years, it is the craze of unmanned operation and intelligent control, so many factories in China that produce steel coils, steel pipes and other similar products, in order to increase productivity and reduce costs, upgrade the bridge crane in the existing workshop to semi-automatic control or even full-automatic control. By simply setting the operation program in advance, the overhead cranes can automatically complete the actions of gripping, moving and placing.
