Double Girder Overhead Cranes

Keyword:Double Girder Overhead Cranes   Model:5Ton-50Ton   Time:2018-10-13 8:20:35

Double girder overhead cranes are used when capacity and span requirements are too great for a single girder crane to be used. They also provide higher hook heights because the hoist is placed between the two cross girders rather than below (under the cross girder). Top running double girder overhead crane is mostly used here and we are similar type of demag double girder overhead crane but with much lower price.

FEATURES

• Designed with more reasonable structure and higher strength steel as a whole

• Small dimension, light weight, optimum and dependable performance and low maintenance

• Longer utility life-span, higher working efficiency and high-quality of components

• Easy to hand and operate, few faults and improved cost-effectiveness, long service life

• Low noise, energy-conservation, environment protection, pollution-free, reliable and affordable

• Small and light wheel load, low-sway load is controlled and positioned easily and exactly

• Low consumption of power which can reduce the costs to make products be used longer

• Favourable, safe and powerful travel characteristics get consumers’ enthusiasm attention

• Excellent exchange ability for parts and components makes the maintenance become easier

• All motions of crane and hoist are independently, and also can be run simultaneously

• Soft starting motor makes the cranes start and stop more steadier and smoother than others

• 42CrMo alloy forged wheels provide the products great shock resistance and wear resistance

• Wide selection of operational speeds completely meets the consumers’ different requirements

• Minimum wear of crane runway and travel wheels provide a long service life to cranes

• Optimised headroom via main girder connection variants makes products become more durable

• Equipped with traveling limit switch and other safety devices provide fully safe to the load jobs

Capacity                          5Ton-50Ton
Span                               10.5-31.5m
Standard  Lift                 12 m
Use                                  Lifting  Up/Down, Traversing Left/Right
Drive Mode                    Motor
Control Voltage             24v, 36v, 42v, 48v, 110v
H.S. Code                       84261120
Material                          Steel Plate
Sling  Type                     Wire Rope or Chain
Work Duty                      A3~A5
Power  Supply               220v-660v, 50/60 Hz, 3 phase, single or dual voltage
Package                         Plywood case (girder and end truck are packed by rain-proof plastic, electric hoist and all other things are packed by firm  wooden case or crates and plywood cases)
Certification                  ISO, CE, SGS
Color                              As you required
Warranty                        12 months
Operation                      Pendant control, remote control or cabin control (open or closed type), driver's room

INTRODUCTIONS

             Double girder overhead cranes are used when capacity and span requirements are too great for a single girder crane to be used. Double girder overhead  cranes also provide higher hook heights because the hoist is placed between the two cross girders rather than below (under the cross girder), this adds up to 3 feet more for the items lifted off the floor. Double girder overhead cranes are also excellent solutions for handling large loads with long spans. Full length walkways can also be provided for easier servicing of the crane.

             Double girder overhead crane consists of two end trucks with gear motors, two bridge girders, trolley hoist unit (or electric winch), electric panel, push button  station, which include safety equipment of cross bar limit switches, overload limiter, siren light, etc. In these components, bridge girders (main girder) are beam or box, trolley hoist is double girder, festoon flat cable power supply  system or energy chain supply power of the hoist, trolley or festoon flat cable  power supply system supply power of the crane, two-speed motors on lifting  and travelling mechanisms or stepless speed control by means of  frequency inverters, and 3 types of control for you choose: independent  overhead control box with buttons, or remote radio control, or cabin. What’s  more, in order to ensure the high-quality of our double girder overhead cranes, the parts all adopt from well-respected names. We provide maintenance and  operating pamphlet to our customers, which makes our overhead cranes become easy to hand and easy to change the parts.

            Our double girder overhead cranes are designed by professional workers to show outstanding and excellent performance. The structure of our crane kits is made of rectangular  steel tube or steel plate. Besides, the steel’s material is national standard Q345B or Q235B, which can provides more safety to the load works and prolongs our products service life. Main girder is the principal horizontal beam  of the crane bridge which supported by end trucks, and it has the function of supporting the trolley hoist. End truck is located on either side of the  bridge. The high-quality wheels of end truck ensure the whole crane to travel.  It is an important component of double girder overhead cranes, which can support the main girder or the trolley cross members. Trolley is a unit which carry the hoist mechanism to travel on the bridge rails. It is have the function of transport the load safely.

            Double girder overhead cranes also can be called bridge cranes, which consist of the  assembled structure which spans between parallel rails or runway tracks, and are  adapted to carry a suspended load horizontally along the runway. Bridge cranes can be top running or under-hung with single or double girder configurations. They also incorporate hoists on trolleys to move the load laterally as well as vertically. Bridge cranes can be mobilized via push  trucks, geared, or motorized end trucks.

          Compared with single girder overhead cranes, double girder overhead cranes have many own advantages. The maximum lifting load is more higher than others. Besides, the variable frequency control of big or small trolleys makes running become more stability, reliable and safety. The design of reasonable structure minimizes abrasion and maintenance of cranes during using, also ensures good running status of hoist.

           They are widely used in petrochemical, metallurgical workshop, machinery manufacturing shop, petroleum, building materials, ports,  electronics, paper making and other industries workshops, yards, warehouses,etc. Besides, double girder overhead cranes support CMAA Class C, D, E, F,  Mill Duty Hot Metal and Magnet applications.

           They are also named Double girder top running overhead cranes, Top running Double girder overhead crane kits with hoist, Double girder bridge cranes, Double girder overhead travelling crane, Double girder bridge overhead cranes. It is a totally new but not used crane, Please check above for downloading specification, double girder overhead crane design, drawings and price will be sent on your request.


             

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Detailed Description
1.Steel Structure
           Our double girder overhead cranes are made of Q235 or Q345 carbon structural steel. Besides, all steel plates for them must have shot blasting. High-quality steel material can fully prolong products’ service life.

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2.Reinforcement Structure
           Main girder with strong box type and standard camber. There are the reinforcement plate inside the main girder, which makes the main girder has a well performance.

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3.Main Girder
             The shape of main girder are beam or box to completely meets customers’ requirements. It is made of high-quality steel which can ensure it be used longer,  and also provide more security to the load assignments.


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4.Wheel
             Double girder overhead cranes are equipped with high quality forged or casting wheel,  which will have heat treatment to ensure wheel’s performance. The wheel is made of good material which can protect our double girder overhead cranes totally from rust and corrosion.

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5.Division Part
             Division part is convenient for transport by container, main girder are divided. The 3 times connection steel plates and high strength bolts can ensure the division parts’ rigidity, also can provide customers great products.

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6.Electric Winch
             With heavy capacity and high work duty, electric winch was developed specifically for lifting that requires accurate and smooth movement.

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7.Trolley hoist
            It is assembled with reducer, motor, brake, trolley frame, pulley,  hook, drum, rain cover and other parts. It includes cross traveling mechanism and lifting mechanism. Trolley hoist is suitable to the double girder overhead crane with European or normal type, and can load  the hoist to move freely along the main girder.

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8.End truck
           High-performance end truck  with wheels is driven by motor, which has a function that run along the track to usefully help the crane move longitudinally. It is connected to main girders by high-strength bolts. The wheels with roller bearings and permanent lubrication. Motor with smooth starting and stopping characteristic.

 Double Girder Overhead Cranes china1-10.jpg

9.Cabin
         It is the workplace for manipulating crane by operator, which welded of steel plate and steel and mounted on a bracket below the main beam with solid and reliable connection. The cabin is closed and open type, air-conditioning provided, interlocked circuit breaker provider, and SIEMENS smart control panel if needed.

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10.Electric panel box

         It is used for winch and crane power supply, which can operate or stop double girder overhead cranes immediately and timely.

             Double Girder Overhead Cranes china1-13.jpg

11.Reducer

             Reducer is widely used in turbines, shaft liners and axletrees. It is good resistance to wear, with high precision in dimensions,low noise, advanced centric running castings, air vent and high precision.


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12.Hook
           Forged steel hook provides more safety and security to our overhead cranes. It is an important equipment to lift the loads, and a solid hook can highly increase the number of maximum lifting loads.

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13.Cable reel
             Directly for the overhead crane used for coiling cable, a cable retracting function, and provide power for crane.

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14.Safety Devices
           Lifting height limit device
           Emergency stop function
           Weight overload protection device
           Wireless infra-detector for anti-collusion
           Double girder overhead crane traveling limit switch
           Voltage lower protection function
           Phase sequence protection function
           Warning indicator: flashing lights and warning sound.

Technical info

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Specifications

Lifting Capacity    (t)
Main Hook
 
5
10
16
20
 
Auxiliary Hook
   
3.2
5
Span
10.5-31.5
LIfting Height (m)
Main Hook
 
16
16
16
12
 
Auxiliary Hook
   
18
14
Speed
Main Hook Lifting
A5
11.3
8.5
7.9
7.2
A6
15.6
13.3
13
12.3
Auxiliary Hook Lifting
   
16.7
19.5
Trolley Traversing
 
37.2
43.8
44.6
44.6
Bridge    Traversing
A5
89.8/91.8
90.7/91.9/84.7
84.7/87.6
84.7/87.6
A6
92.7/93.7
115.6/116/112.5
112.5/101.4
112.5/101.4
Max. Wheel Load (kn)
 
A5
74-125
102-160
141-205
163-231
  
A6
75-126
104-162
145-211
167-239
Rail Recommended
38 kg/m
43 kg/m
43 kg/m or QU70
43 kg/m or QU70
Wheel    Diameter of Trolley (mm)
φ160
φ160
φ160
φ160
Wheel Diameter of    End Carriage (mm)
φ160
φ200
φ250
φ250
Operational Model
Cabin; remote control; ground handle
Working Duty
 
A5,A6
Power Supply
380v,    50Hz, 3phase or customized
Weight (kg)
Trolley
A5
2126
3424
6227
6856
 
A6
2224
3562
6427
7180
 
Total    Weight
A5
12715-31405
14270-34405
19128-39428
19947-41497
 
A6
12991-31596
14719-34699
20045-41315
20984-44225
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