

- A1
- A2
- A3
- A4
- A5
- A6
- A7
- A8
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Lifting hook
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Grab bucket
Strong Structure & Long Life
Built with high-strength box-type girders and welded end beams.
Uses bolt-connected parts for easy transport and fast assembly.
Welded with automatic machines and tested with NDT to ensure quality and durability.
Stable and Smooth Operation
Quiet movement with soft start and stop to reduce wear.
Three control options: ground control handle, remote control, or cabin (open or closed).
Safe to Use
Comes with overload limiters, emergency brakes, and motor protection (heat/current).
Has dual limit switches and rubber bumpers to avoid collisions.
Meets CE, ISO, GOST, SGS standards with full testing before delivery.
Custom Built for Your Needs
Lifting devices include hook, grab, or magnet.
Customized for load, span, height, voltage, rail system, and temperature.
Load capacity: 5t to 50t standard, custom up to 800t; span: 10.5m to 31.5m (up to 110m customizable); lift height: 5m to 110m optional.
Comfortable Cabin Design
Full-view cabin with strong glass, adjustable seat, optional AC, and fire extinguisher.
Wide walkway for easy maintenance and access.
Heavy-Duty Use: Fits steel plants, warehouses, and workshops.
Modular Design: Easy setup with pre-assembled parts.
Direct Factory Supply: No middlemen, better price and control.
Tested and Certified: Each crane tested before shipping.
Full Service: From design to install, plus 1-year warranty and lifetime support.
QD means “Bridge Crane with Hook” (Q=Bridge, D=Hook). This model is made for mechanical workshops, warehouses, power stations, and general material handling.
It includes:
Bridge Frame: Two main girders, two end beams, walkways, and railings.
Trolley: Lifting mechanism + trolley travel motor.
Main Travel Mechanism: Moves the crane along the rails using motors, brakes, shafts, and wheels.
Electric System: Includes all wires, resistors, and control panels.
Lifting Mechanism: Uses motors, brakes, gears, ropes, and drums (single or dual brake).
Driver’s Cabin: Operator’s room with full controls. Safety door prevents crane movement if not closed.
Hook Group: No cracks or wear allowed.
Pulley Set: Must rotate smoothly, no welding repairs allowed.
Wire Rope: Check for breaks, rust, or damage. Use lithium grease.
Drum Set: Enclosed gear drive, supports wire rope.
Reducer: Lowers motor speed. Watch for noise and oil leaks.
Coupling: Connects shafts. Check lubrication.
Brake: Standard type YWZ. Check pads and smell.
Wheel Set: Check rim wear, replace if less than 10mm.
Buffers: Rubber or spring type, absorb crash energy.
Resistors: Reduce motor current during startup.
Power System: Includes conductor rail, cable trolley, and collector.
Limit Switches: End switches for safety.
A5: For general factories with light-to-medium work.
A6/A7: For more frequent or continuous use, like casting workshops.
Environment: -20°C to 40°C (A5–A6); up to 60°C for A7 in steel foundries.
Outdoor Use: Add rain protection.
Ground Control:
Example: QD20/19.5/10DA5 = 20t, span 19.5m, lift 10m, A5
Cabin Control (Open or Closed):
Example: QD32/5/22.5/9KSA6 = 32t main + 5t aux, span 22.5m, lift 9m, open cabin, A6
Remote Control:
Example: QD10/16.5/9YA5 = 10t, span 16.5m, lift 9m, A5
The QD Hook Double Girder Overhead Crane is built for moving heavy loads in many work environments. It works well in factories, warehouses, ports, and power plants. This crane is safe, strong, and easy to control. It can be used for daily operations, even under tough conditions.
1. Manufacturing and Factories
Machine shops: Lifting machines, molds, and materials.
Auto plants: Moving engines and frames.
Steel works: Handling beams, coils, and metal plates.
2. Warehousing and Logistics
Freight yards: Loading and unloading pallets and containers.
Storage centers: Moving bulk items and packed goods.
3. Mining and Heavy Industry
Mining sites: Lifting rocks, ores, and mining tools.
Power plants: Handling coal, turbines, and parts.
4. Construction and Shipbuilding
Building sites: Moving concrete, steel beams, and large pieces.
Shipyards: Assembling ship parts and heavy sections.
5. Material Handling Options
With grab: For sand, gravel, and grain.
With magnet: For steel plates and scrap metal.
Temperature: -10°C to +40°C
Humidity: ≤ 85%
Not for: Explosive, flammable, or corrosive environments.
Not for: Outdoor use without custom protection.
Custom Options: Hook, grab, or magnet depending on your material.
Smooth Operation: Inverter drive ensures stable and quiet movement.
High Safety: Equipped with overload, lift/travel limits, gate locks, and alarms.
Strong in Harsh Conditions:
Used in port warehouses (1# and 2#) for loading mixed cargo 330 days/year in 3 shifts.
Anti-corrosion coating (Sa2.5 grade), strong paint layers, and seismic rating of 6 make it ready for coastal environments.
Check hook, wire rope, brakes, and safety devices before starting.
Make sure no one is on the bridge or rail before turning on power.
Lockout-tagout must be removed before use.
Test brake by lifting load 0.5m off the ground before full lift.
Sound horn when lifting/lowering, starting trolley, or near people/other cranes.
Follow standard signals.
In case of power failure, stop all controls and reset after checking.
Do not reverse movement to stop the crane. Always stop first, then change direction.
When using both hooks, move them one at a time if at similar height.
Never lift two objects with two hooks at once.
Do not adjust brakes while under load.
Do not rely on limit switches for normal stops.
Always inspect and follow the “Ten No-Lift Rules”:
Ten No-Lift Rules
No clear signal or mixed signals.
Load exceeds crane’s rated weight.
Load not secured or hook not used properly.
Someone on the load or extra items on it.
Brake or safety parts not working.
Processing while crane is holding load.
Slant or side pulling.
Explosive items.
Items buried underground.
Sharp-edge loads without protection.
Raise the hook, park crane and trolley in proper place.
Set all controls to "zero", turn off power.
Do daily maintenance and complete shift handover.
Only for indoor use in factories, assembly shops, and warehouses.
Not suitable for explosive or corrosive environments.
Do not carry loads over people.
Never let the hook hang lower than one person’s height.
Never use crane to pull buried objects.
Never stop crane using reverse power except during emergency.
Always use warning sound before operation.
Always test brake before lifting heavy loads.
When leaving, stop crane, clear hook, and cut power.
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