Factory Motor-Driven Traveling 25 Ton Double Girder Overhead Crane

Product Description

Factory Motor-Driven Traveling 25 Ton Double Girder Overhead Crane, also known as a bridge crane, that operates on an elevated track. The bridge frame of the bridge crane runs longitudinally along the track laid on the two sides of the viaduct, and the lifting trolley runs horizontally along the track laid on the bridge frame, forming a rectangular working range, so that the space under the bridge can be fully used to lift and transport materials without being hindered by the ground equipment. Bridge crane is an important tool and equipment to realize mechanization and automation in modern industrial production and lifting transportation. Therefore, the bridge cranes are widely used in the indoor and outdoor industrial and mining enterprises, iron and steel chemical industry, railway traffic, port and logistics turnover and other departments and places.

Composition

• Lifting Trolley

It is composed of lifting mechanism, trolley running mechanism and trolley frame. The lifting mechanism includes the motor, brake, reducer, drum and pulley block. The motor drives the drum to rotate through the reducer, and causes the wire rope to be wound on the drum or lowered from the drum, so as to lift or lower the weight. Trolley frame is the frame that supports and installs lifting mechanism and trolley movement mechanism and so on. It is usually welded structure.

• The rotation of the trolley

The rotation mode of the trolley is divided into two types according to the installation position of the reducer. One is installed in the middle of the driving wheel of the trolley, so that the torque borne by the output shaft of the reducer and the rotation shaft on both sides of the trolley is relatively uniform. The other is that the reducer is installed on the side of the trolley driving wheel, which is more convenient for installation, maintenance, maintenance and so on.

Bridge girder operating mechanism

The metal structure of the bridge girder

It is composed of main beam and end beam, and can be divided into single main beam bridge and double beam bridge. The single main girder bridge is composed of a single main girder and the end girders on both sides of the span. The double girder bridge is composed of two main girders and end girders. The main beam is rigidly connected to the end beam, and the end beam is equipped with wheels at both ends to support the operation of the bridge on the elevated structure. The main beam is welded with rails for lifting trolley operation. There are many structural types of the main girder of the bridge frame:

• Box structure

The main girder is composed of the upper and lower flanges and the vertical webs on both sides. The trolley rail is arranged on the center line of the upper flanges. It is simple in structure, convenient in manufacture, suitable for mass production, but has a large self-weight.
Partial rail box double beam and rail box single girder cross section are ranged from upper and lower flange plate and the thickness of main and deputy web, rail car is decorated in the main web above, the casing short stiffening plate could save, in which partial rail box single main box girder is composed of a wide flange instead of two main girder, the weight is small, but made more complex.

• Four truss structure

The closed space structure is composed of four planar trusses. The surface of the upper horizontal trusses is generally covered with a walking platform, which is light in weight and high in stiffness. However, compared with other structures, the trusses have large external dimensions, complex manufacturing, low fatigue strength and less production.

• Vierendeel truss structure

Similar partial rail box girders, a closed structure consisting of 4 pieces of steel, in addition to the main web for solid abdomen i-section girder, rest 3 piece of sheet metal in accordance with the design requirements of cutting into many window, form a vierendeel truss without diagonal, in the upper and lower levels of truss surface covered by bedplate, crane running mechanism and electrical equipment installed inside the bridge, weight is lighter, the overall stiffness is large, it is more widely used in China a type.

Parts Of Crane