Double Girder Gantry Crane is applied to the open warehouse or rail for general handling and lifting work.

Hook-type double-girder gantry cranes are the most common gantry cranes, which can be used in a wide range of environments, mainly for moving objects outdoors and loading and unloading very heavy materials.

Lifting Capacity5 to 550 ton
Lifting Height1 to 40 meter
Span 12 to 35 meter
Lifting speed1.5 to 11.5 m/min
Trolley running speed10 to 40.1 m/min
Crane running speed16 to 50 m/min
Working DutyA5,A6

Double Girder Gantry Cranes can be equipped with three possible hoists.

CD&MD Wire Rope Hoist

When installed on a double girder gantry crane, the WeiHuaCrane CD&MD wire rope hoist can give you a lifting capacity of 5 to 64 tons.

CD wire rope hoists offer you a choice of speed.
MD wire rope hoists offer you two-speed options.
CD&MD wire rope hoists are easy to install and maintain, easy to operate, and cost-effective.

double girder overhead crane using CD&MD wire rope hoist, model LH, also known as LH gantry crane.

CDMD Type Hoist for Double Girder

MG Double Girder Gantry Cranes

MG double girder gantry crane is a gantry crane with an electric hoist (CD and MD) as the lifting mechanism, with a lifting capacity of 5 tons to 64 tons, and is used for general material handling and lifting. The electric hoist gantry working class is A3 to A5.

Double Girder Gantry Crane

NR Wire Rope Hoist

When installed on a double girder gantry crane, the WeiHuaCrane NR wire rope hoist gives you a lifting capacity of 5 to 80 tons.

NR wire rope hoist adopts a C-shaped layout, which has higher space utilization and simple maintenance.

double girder gantry crane using NR wire rope hoist, model NMG, also known as NMG gantry crane.

New Type Hoist for Double Girder

NMG Double Girder Gantry Cranes

NMG double girder overhead crane is the latest version of the gantry crane, which is designed with FEM standards and developed on the basis of traditional cranes. Therefore, NMG double girder gantry crane has unparalleled performance, compact structure, light weight, safety, and reliability, It has high execution efficiency and is widely used in all walks of life.

Due to the design advantages, the NMG double-girder gantry crane can help you reduce the initial investment in plant construction, improve productivity, reduce routine maintenance workload, reduce energy consumption, and obtain a higher return on investment.

Double Girder Gantry Crane

Winch Trolley

When installed on a double girder gantry crane, the WeiHuaCrane Winch Trolley gives you a lifting capacity of 5 to 550 tons.

double girder gantry crane using NR wire rope hoist, model QD, also known as QD gantry crane.

Commonly used in high-capacity cranes for good loading conditions.

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MG Double Girder Gantry Cranes

MG Double Girder gantry cranes can lift loads ranging from 5 tons to 550 tons. They are widely used in the loading and moving of normal weights in fixed cross spaces, and can also be used with various special hoists for special operations.

Double Girder Gantry Crane

Introduction

Hook-type double-girder gantry cranes are the most common gantry cranes, which can be used in a wide range of environments, mainly for moving objects outdoors and loading and unloading very heavy materials.
Of course, if you don’t have a steel structure in your plant, you can’t erect a bridge crane, you can also install a gantry crane. The stress point of the hook-type double girder gantry crane is not on the factory building but on the ground.

What can we offer you?

Lifting capacity 5t-550t, span 10.5m-31.5m, lifting height 1m-30m, working duty is medium (A5, A6). Also, supply non-standard products according to your requirements.

Lifting Capacity: 5 ton; 10 ton; 16/3.2 ton; 20/5 ton; 32/5 ton; 50/10 ton; 75/20 ton; 100/20 ton; 125/32 ton; 150/30 ton; 160/32 ton; 200/50 ton; 250/50 ton; 300/75 ton; 350/80 ton; 400/80 ton; 450/100 ton; 500/100 ton; 550/100 ton;

Example: 16/3.2ton: Double hook

Span: 10.5m; 13.5m; 16.5m; 19.5m; 22.5m; 25.5m; 28.5m; 31.5m;

Working Duty: A5(Used in working not so frequency, such as general machining and assembly workshop) A6 (Used in much more frequency work, such as auxiliary hoisting in metallurgy and casting workshop) A7 (Used in busy working and the hoisting of melted hot metal)

Custom Made

If these cannot meet your requirements, we can also design and manufacture single-girder gantry cranes that meet your needs according to your needs.

The main purpose of the Double girder gantry crane?

Applied to materials handling between fixed span, and it’s one of the most widely used cranes with the largest number of varieties of different specifications.

Widely used in carrying, assemble and unassembling general weights, and also can equipped with various special hoists for a special operation.

Forbid to use in the conditions as easily combustible, explosive, corrosive (acid, alkali, plating, steam, etc.)

Features

Hook double girder gantry crane has a strong carrying capacity (up to 550 tons);
Large span (span is between 12 and 35m, and can be customized if needed);

Good overall stability (double beams, lifting equipment on the top, better force);

Variety of varieties (common type is the most used type if, in a special environment, it can also be specially made for waterproof, explosion-proof, etc.)

The whole machine has a novel structure, beautiful appearance, and good manufacturability (better wind resistance, longer service life)

Standardization, generalization, and serialization of parts and components (frequent use will inevitably cause some parts to be damaged, don’t worry, we will provide you with parts quickly, and at the time of your initial purchase, we will prepare additional vulnerable parts for you Parts, the best possible way to ensure the normal operation of your gantry crane)

Flexible and stable operation, safe and reliable (there are a variety of safety equipment to ensure the safe work of your equipment and personnel)

Application Scenarios

Double Girder Gantry Crane is mainly used in Steel, Forest Products, Inter-modal, Biomass/Pellet, Concrete, and many other industries. Our product can be used in outdoor workplaces for loading and unloading operations, such as port, open yard, stockyard, shipyards, warehouse, railway freight station, construction site, etc.

Main Structure

Main composed of gantry mounting, trolley & crane traveling mechanisms, and electric parts.

Gantry Mounting

1.”A” type structure, using tack bolts and contacting bolts to settle main parts;
2. Provided max. the room between legs to ensure the objects could be lifted between legs at the cantilever end;
3. All partial rail box beam structure main girder, the camber meet standard (0.9~1.4)/1000S, flange and bolts contact main girders and legs;
4. Box structure legs, both sides contact separately with main girders and lower separators.
5. Q235B or Q345B materials (similar as Fe37 or Fe52).

Trolley

Consists of a trolley frame, lifting mechanism, and trolley traveling mechanism, etc.

Trolley Frame

Welded of steel plate with high intensity and strong rigidity.

Equipped with lifting mechanism and trolley traveling mechanism.

Lifting Mechanism

1. One set of independent driving devices for single hook and two separate driving devices for double hook (main and auxiliary).

2. Lifting mechanism working principle, through high speed rotating of YZR type crane special motor, and gear coupling drive involute gear reducer. Then the low-speed shaft of the reducer turns the wire rope drum. As long as the control of motors and their positive and negative rotation can achieve the lifting function of the hook.

3. In order to ensure the security and reliability of the lifting mechanism, the brake is installed on the high-speed shaft of the reducer. And the load limiter is installed on the bearing pedestal which supports the drum to avoid overload.

Trolley Traveling Mechanism

1 . Trolley traveling mechanism working principle, the involute vertical gear reducer driven by a motor. The low-speed shaft of the reducer contacts to the active wheel of the trolley frame in the way of centralized driving. The motor adopts double-output gear and there is a brake on one end of it.
2 . There are four wheels installed under the trolley. Two of them are active wheels and the others are driven wheels. Driving devices include 1. Motor; 2. Brake; 3. Reducer; 4. Compensating shaft; 5. Coupling; 6. Wheels, etc.

image 1

Crane Traveling Mechanism

Separately drive;

Vertical trinity drive, compact and safe;

The interference fit key to link the wheels and axles, angle bearing box for wheel group;

Two sets outage terminal limiter and backstop device with buffer, for accurate positioning of crane;

Equipped rail clamp and anchorage for wind and stormproof.

Electrics

Module speed control could achieve slow speed and double speed;                           

Rational layout control cabin, easy to maintain;

All external cable with the mark;

HxPnR high conductive, small pressure.

Security Protection

1. overload & short circuit protection

Master air switch in the master circuit, small air switch or fuse protection as overload, and short circuit protection in the control circuit. Overcurrent & overload protect functions are set in all control cabinets.

2. zero position protection

 Every controller should be back to zero position, then restart the master contactor when the crane starts or restart to work.

3. limit protection

(1)limit switch in the lifting mechanism breaks the control circuit when the hook gets the limitation for ensuring security.

(2)limit switches in both trolley and crane travel mechanisms break the control circuits when traveling to the limit position. It can only travel to the other side.

(3)limit switches are also set in the door of the cabin and balustrades. The master power can be started when these doors are totally closed.

(4)emergency protection

The emergency switch could quickly break the power in an emergency.

(5)overload protection

Overload limiter is set in lifting mechanism, it could break power, alarm with sound and light and show the number when overloaded.

Control Mode

Cabin control, fully enclosed, steel plate bending production with enough strength and stiffness, broad vision;

Linkage control design could ensure drivers operate safely and comfortably. Safe and convenient passageway, comfortable seat. The cabin is equipped with a fire extinguisher, the display screen of overload limiter.

Capacity Datasheet

CapacitySpanLifting heightLifting speedTrolley speedCrane speedWork dutyTrack type
S(m)mm/minm/minm/min
5 ton18~356~1811.537.237.7A3-A7P43
10 ton18~356~188.537.437.7A3-A7P43
16 ton18~356~187.940.140.1A3-A7P43 QU70
20 ton18~356~187.24040.1A3-A7P43 QU70
32 ton18~356~1863738A3-A7P50 QU80
50 ton18~356~185.931.344A3-A7QU80
75 ton18~356~184.738.238.3A3-A7QU80
100 ton18~356~183.933.932.3A3-A7QU100
160 ton18~356~183.522.528A3-A7QU100
200 ton18~356~183.52928A3-A7QU100
250 ton18~356~182.22850A3-A7QU120
320 ton18~356~182.316.628A3-A7QU120
400 ton18~356~181.51018A3-A7QU120
450 ton18~356~181.51018A3-A7QU120
500 ton18~356~181.511.516A3-A7QU120

Double Girder Gantry Cranes Installation Guide


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