220V 480V 20 Ton Double Girder Gantry Crane A3 A8 Heavy Duty Overhead Crane

Heavy Duty 20 Ton Gantry Crane , Double Girder Gantry Crane Various Models

Description:

A gantry crane is a variant of an overhead crane. It is mainly used for the loading and unloading of outdoor cargo yards, stockyards and bulk cargoes. Gantry cranes have the characteristics of high site utilization, large operating range, wide adaptability and strong versatility, and are widely used in port cargo yards.

Its metal structure is like a door-shaped frame, and two feet are installed under the bearing main beam, which can walk directly on the track on the ground, and the two ends of the main beam can have outrigger cantilevers.

The double main girder gantry crane has strong bearing capacity, large span, good overall stability and many varieties, but its own quality is larger than that of the single main girder gantry crane of the same lifting capacity, and the cost is also higher. According to the different main beam structures, it can be divided into two forms: box beam and truss. Generally, a box structure is used.

Features & Advantages:

1. Steel structure: Q235B/Q345B carbon structural steel with seamless once forming technology more strong and elegant. Suitable for different operation temperature;
2. Lifting mechanism: Reducer, drum, motors protection class F class, China or World top quality motor brands, such as Jiamusi, Nanjing motor, ABM, etc;
3. Hook: Finest steel forged hook, long using life;
4. Wheels: Vacuum casting, with compact structure, convenient maintenance, high transmission efficiency and long service life;
5. Travel mechanism: With China or world famous crane motor, reducer supplier, such as Nanjing motor, SEW etc;
6. Electrics: Chint, Schneider or Siemens etc.

MG Double girder gantry crane main have below Types:

• MG type double girder gantry crane

• U type double girder gantry crane

Safety Device:

1. Overload protection
2. Main lifting motor with thermal protection
3. Hooks with latch
4. Rubber buffers
5. Protective earthing
6. Crane switch and travel end switch
7. Emergency switch can stop all movement when any dangerous happened
8. Sub-assemblies characteristic are tested before assembly
9. All cranes must be pre-assembled and tested before leaving factory and offer the certification of test.

Components of Double Beam Gantry Crane:

-Gantry frame (main beam, support leg, floor beam)
-Winch trolley
-Crane travel mechanism
-Ground control/Remote control /Cabin control