The double girder gantry crane is especially suitable for the heavy working frequency, and heavy used places. It has the characteristics of compact structure, good manufacturability, flexible operation, strong carring capacity, high site utilization, large operating range, wide adaptability, strong versatility, stable and reliable operation, etc.
MG general gantry crane is a crane designed and manufactured in accordance with national and industry standards such as GB/T3811 "Crane Design Specification" and GB/T14406 "General Gantry Crane". The crane is suitable for indoor or open-air operations, used for lifting materials, and equipment installation and maintenance. The crane is composed of gantry steel structure, trolley, crane traveling mechanism, and electrical system, etc. Outdoor cranes are also equipped with rail clamps, anchoring devices, cable anchoring devices, wind speed/wind direction meters and other devices.
Compared with the single girder crane, double girder gantry crane is more powerful and the gantry crane design is more complex. We attach great importance to product's reputation. So, we never try to attract customers by a low gantry crane price with the inferior quality. Quality and safety come to the first!
It is mainly used to lifting heavy loads, with high working strength, in sever working condition, or with other special working demands.
The maximum lifting capacity is almost unlimited. The biggest double girder crane we have made is 320 tons. The span and lifting height and all other main parameters is also complex. For more technical details, please Download Our Technical Parameter File.
Generally speaking, there are two typical kinds:
Just as shown above, the most different between them is the shape of the supporting legs. Apparently, there is bigger space under the leg in U shaped double girder gantry crane than A shaped, especially in width. Thus bigger products can move though the leg. In addition, in U shaped double girder crane design, there is no supporting saddle. When the lifting height is decided, the U shaped double girder crane has a small total height, and that is wonderful.
Here comes the A Shaped Double Girder Crane in our factory, if you, some day, have an interviews to our factory. You can't miss it, for it just located at the front door of our factory.
The main beam adopts welded box or truss type, which has good rigidity and strength.
In order to facilitate inspection and maintenance, pedestrian passages and railings are provided on the main beam.When designing and manufacturing, the upper arch is considered. The camber shall not be lower than GB/T14406-93 "Universal Gantry Crane" and other current relevant standards.
It adopts a welded box or truss structure, and the legs are composed of upper flanges, lower flanges, and supports welded by steel plates or section steels. The upper flange is large and the lower flange is small, making the legs a variable cross-section structure with a large upper and a small lower flange, which can effectively carry vertical and horizontal loads.
The cabin adopts the fully enclosed type. The frame structure is made of welded steel plate and section steel, and is installed on a bracket under the main beam. The connection method should be firm and reliable, with sufficient strength and rigidity. The cab layout is implemented in accordance with the corresponding national standards and fully embodies humanity, and meets the demand-side requirements.
Safe and reliable ladders, platforms and walkways are provided where operation, inspection, and maintenance are required, and there is sufficient working space. Railings are set on the platform walkway, the height of which is 1050mm. Consider anti-skid safety measures for platform walkways.
The trolley is mainly composed of the lifting mechanism, the trolley frame and the trolley running mechanism.The trolley frame is a combined structure of plate welding, which has sufficient strength and rigidity. The outdoor trolley adopts a sealed rain cover, and the trolley is equipped with safety devices such as stoppers, rail clearers, buffers, and operating limits.
The crane traveling mechanism is composed of the steel structure and the running mechanism. The steel structure is made of welded box-shaped structures, which has sufficient strength and rigidity.The running mechanism is composed of motor, reducer, and wheel set, etc. It is equipped with safety devices such as rail cleaners, buffers, and operating limits. For outdoor use, it is also equipped with windproof rail clamps and windproof anchoring devices.
Trolley power supply: use safety buss bar or cable drum to conduct electricity;
Trolley feed: tow cable, the vertical arc of the cable is not less than 200mm from the table surface.
Can use control handle with pendant line, wireless remote control, or cabin control.
The power distribution system is composed of main circuit breaker, main power contact and overcurrent protection.Protection devices include short-circuit protection, over-current protection, loss-of-voltage protection, zero-position protection, ascending limit protection, stroke limit protection, emergency power-off protection, interlocking protection devices, etc.
Trust building is really hard, but with 10+ years of sales experience and 3000+ projects we've done, both end-users and agents have gained and benefited from our cooperation. By the way, Independent sales rep recruiting: Generous commission / Risk free.