4 Ton 5 Ton Bridge Crane For Sale

4 Ton 5 Ton Bridge Crane For Sale

 

Overhead double girder cranes are generally composed of three major parts: mechanical, electrical and metal structures. The appearance of the bridge-type double-girder crane is a single-span slab bridge whose two ends are supported on two parallel overhead rails and run in translation.

 

Mechanical part: It is divided into three mechanisms, namely the lifting mechanism, the trolley running mechanism and the cart running mechanism.

 

The lifting mechanism is used to vertically lift items, the trolley running mechanism is used to carry loads for lateral movement; the cart running mechanism is used to move the lifting trolley and objects longitudinally, so as to achieve the purpose of handling and loading and unloading goods in three-dimensional space. .

 

Metal structure part: It is composed of bridge frame and small frame.

 

Electrical part: It consists of electrical equipment and electrical circuits.

 

 

Use:

Bridge-type double-girder crane is an important tool and equipment to realize the mechanization and automation of the production process in modern industrial production and lifting transportation. Therefore, double-girder bridge cranes are widely used in indoor and outdoor industrial and mining enterprises, iron and steel chemical industry, railway transportation, port terminals and logistics turnover and other departments and places.

 

Classification:

Bridge double girder crane classification: LH electric hoist double girder crane, 5 to 10 tons double girder grab bucket gantry crane, QD double girder bridge crane, double trolley double girder gantry crane, electromagnetic double girder bridge crane, etc. , Overhead cranes are customized cranes, equipped with different spreaders according to different working environments.

 

Safety Inspection Specification:

Safety inspection of double-girder bridge crane In order to ensure the safe operation of the bridge crane, some safety routine inspections are required during the operation of the crane. The inspection items and key points are as follows:

 

(1) The lifting height limiter, travel limit switch and interlocking mechanisms are in normal performance, safe and reliable.

 

(2) The main parts meet the safety requirements: the increase of the opening is less than 15% of the original size, the torsional deformation is less than 10%; the wear of the plate hook bushing is less than 50% of the original size, the wear of the plate hook mandrel is less than 5%, and there is no peeling , burr, welding repair.

 

There are no obvious defects in the hook hanger and the pulley.

 

Steel wire wear and corrosion on the surface of the steel wire rope is less than 40% of the steel wire diameter, broken wires are less than 10% of the total number of wires within a lay length, no broken ends, no obvious thinning, no core prolapse, dead angle twisting, extrusion deformation , annealing, burning phenomenon. The ends of the wire ropes are connected and fixed by clamps, pressure plates and wedges are well connected without looseness, there are no less than 2 pressure plates and no less than 3 clamps.

 

The reel has no cracks, and there is no loose connection and fixation; the wear of the drum wall is less than 20% of the original wall thickness; the safety reel is not less than 2 turns, and the diameter ratio of the reel to the wire rope meets the requirements.

 

The balance wheel is fixed intact, and the wire rope should meet the requirements.

 

The brake has no cracks, no looseness, and no serious wear. Both sides of the brake gap are equal in size and suitable for sufficient braking force. The wear of the brake band is less than 50% of the original thickness.

 

Through the routine safety inspection of double-girder bridge cranes, it has played a significant role in eliminating personal accidents, reducing equipment accidents, improving equipment operation rate, and reducing maintenance costs.

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