Dongqi crane provided 13 sets of QD-type double-girder bridge cranes for a large profile factory, with specifications divided into QD50t, QD32t/10t, QD20/5t, QD10t, and QD5t. As a professional crane supplier, Dongqi Crane can provide customers with technical consultation, drawing design, and product manufacturing.

The QD general-purpose bridge crane relies on the longitudinal movement along the direction of the support track on the driving beam of the factory building, the lateral movement of the trolley and the lifting and lowering of the hook to realize the work process. The common lifting capacity is 5-200t, the working level is A5-A6, and the control methods include ground control, control room control and remote control for users to choose. Level A5 is suitable for general machining and assembly workshops, metal structure workshops, mechanical maintenance workshops, etc. where the work is not very heavy; Level A6 is suitable for occasions where the work is more frequent or where continuous production or continuous transportation is required.

QD type 50t bridge crane parameters

1、 Basic parameters

• Rated lifting capacity: 50 tons
• Span: 28 meters (adjustable according to the actual size of the workshop)
• Lifting height: 18 meters (adjustable according to process requirements)
• Work level: A6 (Heavy duty work system)

2、 Structural parameters

• Main beam type: Double beam box structure, with high strength and stability
• Main beam material: Q345B or higher strength low alloy structural steel
• End beam structure: box shaped structure used to support the main beam and connect the crane operating mechanism
• Small frame: sturdy small frame design, carrying lifting mechanism and electrical equipment

3、 Lifting mechanism parameters

• Lifting speed: Multiple speed options are available, such as the main lifting speed of 5-7 meters/minute and the slow speed of 0.5-1 meters/minute
• Motor type: specialized for lifting, suitable for heavy loads and frequent starting needs
• Brake type: Normally closed electromagnetic brake, ensuring safe stopping of lifting motion
• Wire rope specifications: Choose the appropriate wire rope specifications based on the lifting capacity and working environment

4、 Parameters of the crane operating mechanism

• Crane running speed: 45 meters/minute (adjustable according to actual needs)
• Motor type: Crane specific motor, providing stable and reliable power
• Wheel material and diameter: Cast steel wheels, surface hardening treatment to improve wear resistance; The diameter is determined based on the bearing capacity and wheel pressure
• Track model: QU series crane dedicated track that matches the workshop track

5、 Electrical system parameters

• Control voltage: 380V/50Hz (adjustable according to local power grid standards)
• Control system: PLC programmable control, achieving precise control and protection functions of cranes
• Protective devices: including overload protection, phase loss protection, short circuit protection, etc., to ensure the safe and reliable operation of the electrical system
• Cable drum: Automatically retract and release cables to avoid damage and safety hazards caused by cable dragging on the ground

6、 Safety facility parameters

• Buffer: Set buffers at both ends of the crane to absorb impact energy and protect the crane structure from damage
• Windproof facilities: equipped with rail clamps, anchoring devices and other windproof equipment to ensure the stability of the crane in high wind speeds
• Limiting device: Limiting devices are installed for lifting, large and small vehicle operation to prevent safety accidents caused by over travel operation
• Emergency stop button: Emergency stop buttons are installed in the crane operation room and key locations to quickly cut off power and stop the crane operation in case of emergency.

QD type 32t/10t double beam bridge crane parameters

1、 Basic parameters

• Rated lifting capacity: 32 tons for main hook and 10 tons for auxiliary hook
• Span: 25 meters (adjustable according to workshop size)
• Lifting height: 16 meters for the main hook and 20 meters for the auxiliary hook (adjustable according to process requirements)
• Work level: A5 (intermediate work system)

2、 Structural parameters

• Main beam type: Double beam box structure, with good rigidity and stability
• Main beam material: Q345B high-quality low alloy structural steel
• End beam structure: box or I-shaped structure, connecting the main beam and the crane operating mechanism
• Small frame: sturdy design, carrying main and auxiliary lifting mechanisms and electrical equipment

3、 Lifting mechanism parameters (main hook)

• Lifting speed: 5-8 meters/minute (multiple gears available)
• Motor type: Crane specific motor, high efficiency, low noise
• Type of reducer: Hardened gear reducer, with smooth transmission and high efficiency
• Brake type: Electric hydraulic brake, safe and reliable

4、 Lifting mechanism parameters (auxiliary hook)

• Lifting speed: 8-16 meters/minute (multiple gears available)
• Motor type: specialized lifting motor, matched with the main hook motor
• Reducer type: the same as the main hook reducer
• Brake type: the same as the main hook brake

5、 Parameters of the crane operating mechanism

• Crane running speed: 30-45 meters/minute (adjustable according to needs)
• Motor type: specialized for lifting, suitable for frequent starting and braking
• Wheel material and diameter: high-strength cast steel wheels, with the diameter determined based on load-bearing capacity and wheel pressure
• Track model: Standard track that matches the workshop track

6、 Electrical system parameters

• Control voltage: 380V/50Hz (standard industrial voltage)
• Control system: PLC control or relay logic control, achieving precise operation and protection functions
• Protection device: including a complete set of electrical protection devices such as overload protection, phase loss protection, short circuit protection, etc
• Cable reel: automatically retracts and unwinds cables, ensuring safe and convenient use of cables

7、 Safety facility parameters

• Buffer: Set buffers at both ends to protect the crane from impact damage
• Windproof facilities: equipped with windproof equipment such as rail clamps and anchoring devices (selected according to the wind conditions in the area of use)
• Limiting device: Limiting devices are installed for the operation of lifting, large vehicles, and small vehicles to ensure safe operation without exceeding the limit
• Sound and light alarm device: emits sound and light prompts during operation to remind surrounding personnel to pay attention to safety
• Emergency stop button: An emergency stop button is set at a critical location to facilitate cutting off power and stopping in emergency situations.