QB double-girder explosion-proof crane with special design

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Quick Details
Feature:     Other
Rated Loading Capacity:    10-500T
Max. Lifting Height:     Any Height
Brand Name:    Dongqi
Warranty:     1 year for main part
power supply:    3-phase, 380V, 50Hz
Ambient temperature:    -25~40 Celsius
Condition:     New
Rated Lifting Moment:    it depends
Span:     7.5-31.5m
Model Number:    QB
After-sales Service Provided:    
Engineers available to service machinery overseas
girder:     double beam
Type:     bridge crane
Application:    indoor wookshop,warehouse
Max. Lifting Load:    500T
Place of Origin:    Henan China (Mainland)
Certification:    CE,ISO,SGS
work grade:     A3-A6
lifting speed:    4m/min
Lifting Motor:     taper squirrel-cage

Packaging & Delivery
Packaging Detail:    Electrical and other parts packed by high quality plywood crate,beams packed by plastic woven cloth
Delivery Detail:    30 days afte we received the deposit

Mainly consists of bridge structure, crane travelling mechanism, electric equipment etc.All motors of QB type explosion-proof

Main features

  • Good quality, high production effeciency, few maintance;

  • High loading strength, high working class;

  • Flexible operation, safe and reliable.

  • In General

  • Compact structure, new style, beautiful outlooking.

  • Good in usability with long service life.

  • Bearing high capacity, high working class.

  • Flexable operating, safe and reliable.

  • Widely used and competitive on quality and price.  

Our factory workshop and manufacturing process

Mechanism Parts

Double girder, welding box beam, camber meet national standard;

Adopt high quality carbon steel, Q235B or Q345B; (similar as Fe37 or Fe52);

Main welding submerged are welded automaticly, nondestructive flaw detection

The trolley is consisted with motor,reducer, brake, coupling, the wheel, drum

No asbestos brake pad or brake block, insert the card installed,safe and reliable .

The speed reducer has hard-toothed surface, compact structure, durable

End girder is matched with rail buffer and rail clearance device.

Crane protection grade is IP54 or IP44, F grade insulation

Brake effectively, and long service life

Crane protection grade is IP54 or IP44, F/H grade insulation

Use special reducer, Hard-toothed surface, Reducer shaft inspected by Ultrasonic testing;

Main hook's reducer shell welding, taking a seal grooves, shaft top sealed well;

Use YWZ model electric&hydraulic pushing rod often-close brake, the main lifting use double brake;

Drum material is 16Mn, made of steel.drum shaft and cylinder body are welded and inspected by ultrasonic testing.

The wheel tread are treated by heating processing;

pulley block are made of rolled steel;

The tooth shape coupling, and the material of the 40 Cr, forging steel;

All buffers use polyurethane (pu) type, on same span,

buffers must have same height;

Hook use forged material, nondestructive flaw detection, fortify the slot device.

Clear girder and trolley pictures

Electric Parts

Electric box layout is reasonable, easy to repair

Security trolley line or angle steel trolley line

External cable are equipped with mark line number

Trolley moving' power is supplied by flat cable

And the conductor is I steal or C shape sliding line.

Safe touch line conductive rate is high, low pressure,

Set electric taxi speed is high.

Lifting and crane can be independently controlled, also can run separately or together.

Sliding smooth, and beautiful outlooking.

Clear electric parts pictures

Protection Devices

Outdoor cranes are equipped with lifting mechanism, electrical control box and rainproof devices.

Set the trolley trip spacing device, anti-collision device

Audible and visual alarm device

And set platform, covery and protective covers and barriers.
Protection Devices pictures

Operation Device

Ground control and cabin control

Special cabin for bridge crane or capsule driver room, open vision, comfortable operation.

The cable have open style, close style,can fixed on left or right

The open direction include end open,side open or top open

The cabin has special small room and the capsule cabin

Ground control has handle and remote control, do not need to set up special driver

Optional Function

All the mechanism speed regulation  is 1:10 or bigger

Overload limiter and alarm display, and the load of weighing and display

Height limiter device

The change between main hook and aux hook on single trolley

Central lubrication

PLC controlling and accident testing, record display and typing system


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