Single Girder Gantry Crane is equipped with a dual-speed electric hoist, widely used in workshops, storage, port, hydroelectric power station, and outdoor places. The lifting capacity of the gantry crane is 1 to 20 tons.
|Lifting Capacity||1 ton to 32 tons|
|Lifting Height||6 m to 20 m|
|Span||8 m to 35m|
|Lifting Speed||0.33 to 8 m/min|
|Trolley Traveling Speed||20 m/min|
|Crane Traveling Speed||20 m/min|
|Working Duty||A3, A4|
Single Girder Gantry Cranes can be equipped with two possible hoists.
CD&MD Wire Rope Hoist
When installed on a single girder gantry crane, the WeiHuaCrane CD&MD wire rope hoist can give you a lifting capacity of 32 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.
Single girder gantry crane using CD&MD wire rope hoist, model LD, also known as LD gantry crane.
NR Wire Rope Hoist
When installed on a single girder gantry crane, the WeiHuaCrane NR wire rope hoist gives you a lifting capacity of 12.5 tons.
NR wire rope hoist adopts a C-shaped layout, which has higher space utilization and simple maintenance.
Single girder gantry crane using NR wire rope hoist, model HD, also known as HD gantry crane.
Design the details
Trolley Travelling Speed
Crane Travelling Speed
motor, reducer, electrics Integrated, Hard to maintain
CD&MD hoist is the supporting equipment of LD overhead crane.
CHNT (origin from China)
Gearbox and wire rope need to add oil every year. Will need to stop production for maintenance.
motor, reducer, electrics separated, easy to maintain
NR hoists are the supporting equipment for HD overhead cranes.
Maintenance-free, no need to add oil 3~5 years
The single-beam gantry crane is a girder composed of one girder, and each side is supported by a movable bracket at the end.
The hoist and the running trolley are most commonly suspended under the girder-which means they run on the rigid structure at the bottom of the bridge.
What can we offer you?
We can provide you with a common single-girder gantry crane with a lifting weight of 1ton to 20ton, a span of 8m to 35m, a lifting height of 6m to 20m, and a light working class (A3, A4).
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 Single Girder Electric Hoist Gantry Crane?
Single girder gantry crane is a kind of light and small material handling equipment that runs on rails.
Main places of use: material handling on different occasions such as mechanical production workshops, factories, warehouses, stockyards, etc.
Single girder gantry cranes cannot be used in special flammable, explosive, and corrosive environments (special material handling equipment).
If you are in a special industry, please write down your industry when you leave a message, and our engineers will customize a gantry crane that meets your industry standards.
- The crane has simple and compact structure;
- It is easy to install and operate;
- It needs less and easy maintenance;
- It has light dead weight;
- It can be customized according to special work needs;
- The crane works reliably and efficiently without failure during lifting work;
- It can be used for many different work occasions, including indoor and outdoor occasions;
- The crane is supplied with very reasonable price.
Single Girder Electric Hoist Gantry Crane is mainly used for material handling in open areas such as docks, freight yards, warehouses, and construction sites.
Main Structure and Feature
Mainly consisted of steel gantry structure, lifting mechanism(electric hoist ), crane traveling mechanism, electric equipment, and other accessories. Normally when working outside, crane and electric traveling and lifting mechanism should equip with rainproof cover.
whole structure box type and trussed type
- Box type structure with a simple manufacturing process,easy transportation and install, the whole structure rigidity,but with a large dead weight.
- Trussed structure, light weight, strong wind resistance, but poor manufacturing processes,inconvenience transportation and installation .
Mainly composed of main girder, ground beam, landing legs, outrigger, ladders, platforms, driver’s room, etc.
Main bearing structure, traveling rail of electric hoist
Material Q235B or Q345B ( similar as Fe37 or Fe52)
U-type groove, inclined plate, rib plate made by cold bending suppress steel plate weld solid web girder with I beam, or truss girder welded by steel plate group
Arched main beam according to request, the arch degree F should be (1/1000~1.4/1000) S, max. Arch degree be in the scope of middle span S/10
There are saddle seats jointed with legs in the two sides of span position, and there are square steel plates contacted with flange
Buffers at the girder end ensure trolley’s safe traveling along the main girder.
Ground beams support the main girder and load, and also contact the main girder and traveling mechanism, one of the main loading metal structures.
Box structure girder welded by U-type groove and steel plate group or only steel plates, with features of light structure, good rigidity, appearance, and welding technology
Buffers settled at the ends of the ground beam
Isosceles trapezoid or right or left trapezoid box pillar welded by steel plate. Wide flanges welded at the upside and narrow flanges at the downside of the pillar increase the rigidity and stability of the gantry frame
Two flexible legs designed for improving crane traveling effect when spanning ≥ 30m
Bolts contact two flanges to become an “A” structure, increasing the crane’s stability
Bolts contact steel plate flange between legs and ground beam, simple structure, easy to install, transport and store
Steel tubes, steel angles bending, antiskid riffled plate on the platform, retaining plate settled at the bottom of the platform; guardrail height:1050mm, the distance of two-level cross bars is 350mm
The inclined angle of the ladder and the horizontal plant is 55°, 60°, or 65°
generally adopted the closed type, top of the cabin can stand 2.5KN dead load at least.
The headroom height inside the cabin ≥ 1.8m.
Crane Traveling Mechanism
Drive separately, composed of traveling motor, traveling reducer, wheel group, etc.
A Structure Mode
ZDY series motor with brake inside used for crane traveling, reliable brake.
LDAC or LDHC type vertical trinity reducer, open gear drive, small width, without coupling.
LDA type wheels, double wheel edges, efficiently avoid failures
Baffles at the end of ground beam contacted by bolts, easy to dismantle, install and maintain
The rail sweeper sweep the barriers on the rail to ensure the safe travel
Rail clamp installed outdoor avoid crane moving due to force;
The switch on the clamp avoid the damage due to driving crane when clamped
B Structure Mode
( the others like A mode except for reducer)
LDA or LDH type trinity reducer, open gear drive, small width, without coupling
C Structure Mode
Drive device simple structure, low noise, safe and reliable, easy to install and maintain.
YZR series wound rotor type motor for hoist and metallurgy used for crane traveling mechanism
Strong overload capacity, large output torque
Separately drive, ZSC or ZSC(A) type vertical reducer
Saving space, a large patio
High transmission efficiency, smooth travel, low noise, easy to install and dismantle
YWZ type electric hydraulic block brake installed between traveling motor and reducer, smooth braking, high operating frequency, safe and reliable
Self-lubricating bearing in main swing hinge points, High transmission efficiency, long service life. Card plug-in brake rim or brake tile without asbestos, safe, easy to replace, and green initiative
Couplings contact the brake, reducer, and motor together.
Double edges cylindrical tread wheel, seldom offset and slip, 45-degree division structure, easy to dismantle, install and maintain
JHQ series polyurethane buffer at the ends of the ground beam can transform impact kinetic energy to elastic potential energy quickly
Reliable hardness and impact elasticity, good storability
Both high and low-temperature resistance, insulation, ensure the crane’s safe travel
Rail sweeper (same as A)
Rail clamp (same as A)
Pressured type load-lifting limiter, set alarm point, sensor settled on wire rope directly remaining original rope structure, control instrument could be installed together with the sensor, or installed in the electrical cabinet or other parts separately
Easy to install and debug, steady quality, intelligent, small size, etc.
Power supply mode
(1) safety slide wire
(2) soft cable
(3) cable drum
(1) cable pulley
The slideway of soft cable and cable pulley could be wire rope slideway, I beam slideway or deformed steel slideway.
Wire and cable
Wire and cable with Copper, multistrand and insulating sheath used all over the crane
Multistrand single cable, whose cross-area of control wire≥1.5mm2 and 1.0mm2 multistrand multicore cable, cross-area of power line≥2.5mm2
The cables set in trunkings or tubes with a thickness of 1.5mm~2mm
Protection devices at the parts of mechanical injury, chemical corrosion, or oil erosion
Pendant: control the actions of all mechanisms by pressing the buttons
Remote control: control the actions of all mechanisms with industrial remote control
Cabin control: control the actions of all mechanisms with the buttons, master switches, cam controller, or linkage in the cabin
The crane could also have two sets of control devices, such as pendant + remote control or cabin + remote control. Two control modes could not be used together for safety.
Electric protection system
Short circuit protection
Automatic air-breaker switch in main power circuit as short circuit protection of the crane control circuit.
The circuit structure has Voltage-loss protect function, the start button must be repressed to restart the crane when power restoration after breaking in case of the crane automatic operating.
Emergency power switch
Rotating reset type emergency power switch like a red mushroom used for switching off power quickly in emergency condition
Emergency power switch set inconvenient place
Overload limiter will send a hint alarm signal when the load reach 90% rated capacity
The power for lifting will be cut together with a prohibitive alarm signal when reaching 110% rated capacity
The sensor is linked with the control box, moistureproof and anti-seismic, anti-interference.
Fire limiter in lifting mechanism as the switch to limit the lifting height, at the same time, protect the controller
Traveling limiter in crane traveling mechanism, composed of traveling limit switch on the crane and safety rule at the place get out of the crane travel, ensure the safe travel of the crane.
A wind-proof rail clamp is installed at one end of the ground beam when used outside. Limit switch on rail clamp interlocks with main power switch, that is to say, the crane could not start when it is locked on the rail by rail clamp.
Zero position and interlock protection
The cabin control crane has zero position and interlock protect function
Zero position protection prevent the motor automatic operating when restore power after power off, avoid accidents
The interlocking of the door and switches avoid accidents like people or objects fall down from the door when the crane starts suddenly as the door opens.
Three-phase fault & voltage fault protection
Comprehensive protection in-circuit system will cut off main power automatically when three-phase fault or voltage fault in case of damaging people and equipment.
Metacor of crane and metal shell, raceway, the low side of the transformer of electric equipment all have grounding. Total grounding resistance≤4Ω and the crane rails could be as a ground wire. Insulation resistance to ground≥1MΩ at normal temperature (it is a measure value of 500V megger at normal temperature).
|Capacity||Span||Lifting height||Lifting speed||Trolley speed||Crane speed||Work duty||Track type|
|5 ton||8~35||6~20||8(0.8/8)||20(30)||20(30)||A3~A4||P24 P30|
|10 ton||8~35||6~20||7(0.7/7)||20(30)||20(30)||A3~A4||P30 P38|
|20 ton||8~35||6~20||3.3(0.33/3.3)||14||20(30)||A3~A4||P38 P43|
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