65T/25T double-girder MG hook type gantry crane technical data

I. Product Overview

The 65T/25T double-girder MG hook-type gantry crane is a large-scale industrial lifting equipment primarily used for heavy material loading, unloading, and handling operations in locations such as open warehouses, material yards, railway freight stations, and port terminals. This model features a dual-girder design with a 65-ton main hook and a 25-ton auxiliary hook, respectively, to meet lifting requirements of varying weights.

Designed and manufactured in accordance with national standards GB/T14406-93 “General-purpose Gantry Cranes” and GB3811-2008 “Design Code for Hoisting Machinery,” this product boasts a stable structure, strong load capacity, and flexible operation. The equipment primarily consists of a box-type double-girder welded bridge, a trolley operating mechanism, a hoisting trolley, an electrical control system, and safety protection devices. The trolley is independently driven and can be centrally controlled from the cab or the ground.

II. Main Technical Parameters

1. Basic Parameters

• Rated Lifting Capacity: Main Hook 65t, Auxiliary Hook 25t
• Working Class: A5 or A6 (determined by frequency of use and load conditions)
• Span Range: Standard configuration 18-35m, custom designs up to 50m available upon request
• Lifting Height: Standard configuration 6-30m (main and auxiliary hooks may differ), custom designs available upon request
• Boom Length: Single or double boom configurations available upon request

2. Operating Parameters

• Trolley Operating Speed: 20-30m/min (Variable Frequency Drive)
• Trolley Operating Speed: 5-15m/min
• Hoisting Speed:
  • Main Hook (65t): 0.5-5m/min (Normal/Slow)
  • Auxiliary Hook (25t): 1.2-12m/min
• Power Supply: 380V three-phase AC, 50Hz

3. Environmental Adaptability

• Operating Temperature: -25°C to +45°C
• Relative Humidity: ≤95% (at 25°C)
• Wind Speed ​​Limit: ≤20m/s in operation; anchorage required in non-operating conditions

III. Structural Components

1. Gantry Structure

This machine utilizes a double-beam, off-track, box-type welded structure consisting of the following main components:

• Main Beam: Box-shaped, with a platform and railings on the upper portion for mounting the trolley’s conductive vertical frame and maintenance access.
• Outriggers: Together with the lower crossbeam, they form an A-shaped structure and are available in either rigid or flexible configurations.
• Upper and lower crossbeams: Connect the outriggers to form a stable gantry structure.
• Saddle: Configurable in cantilever configurations to enhance structural stability.

2. Hoist Trolley

The hoist trolley is the core component for lifting and lateral movement of materials. It includes:

• Trolley frame: A welded steel structure that supports the weight of all mechanisms.
• Hoisting mechanism: Consists of a motor, reducer, drum, brake, and pulley assembly.
• Operating mechanism: Utilizes a three-in-one drive unit (motor, reducer, and brake).
• Hook assembly: 65T main hook and 25T auxiliary hook, compliant with GB10051 standards.

3. Trolley operating mechanism

Utilizes a separate drive system, with two drive units under each outrigger. These include:

• Drive motor (with brake)
• Hard-toothed reducer
• Wheel assembly (double-flange, optional with angular bearing housing)
• Buffers and track wipers.

IV. Electrical Control System

1. Power Supply

• Conductor bar power supply: The trolley utilizes a safety conductor bar power supply system.
• Cable drum power supply: Optional cable drum power supply.

2. Control system

• Driver’s cab control: Equipped with an ergonomically designed seat and console.
• Ground remote control: Optional wireless remote control system (IP65 protection rating).

3. Safety Protection Devices

This machine is equipped with a comprehensive safety protection system to ensure safe operation:

• Overload Limiter: Real-time monitoring of the load, automatically cutting off lifting power in the event of overload
• Height Limiter: Dual limit protection (working limit and emergency limit)
• Travel Limiter: End-of-travel protection for the trolley and carriage
• Wind Protection: Rail clamps, anchors, and anemometer
• Emergency Stop: Emergency stop buttons are installed at each control point
• Anti-collision system: Optional anti-collision device for multi-machine operation

V. Design and Manufacturing Standards

This product strictly complies with the following national standards and industry specifications:

• GB3811-2008 “Crane Design Code”
• GB/T14406-2011 “General Gantry Crane”
• GB6067.1-2010 “Safety Regulations for Hoisting Machinery”
• GB10183-2005 “Manufacture and Track Installation Tolerances for Bridge and Gantry Cranes”
• GB12602-2009 “Safety Technical Specifications for Overload Protection Devices for Hoisting Machinery”
• GB5905-2011 “Crane Test Specifications and Procedures”

VI. Installation and Commissioning

1. Track Requirements

• Track Type: Recommended QU70 or QU80 crane-specific rails
• Track Installation Tolerance: Complies with GB10183-2005
• Ground Resistance: ≤4Ω

2. Installation Process

• Assembly of lower crossbeam and outriggers
• Connection of main beam and outriggers
• Trolley installation
• Electrical system wiring
• Safety device commissioning
• No-load test run
• Static and dynamic load tests

3. Testing and Acceptance

• No-load test: Verify the operating status of each mechanism and the control system
• Rated load test: Verify key performance parameters
• 125% static load test: Verify structural strength and stability
• 110% dynamic load test: Verify the combined working performance of each mechanism

VII. Hook Technical Parameters

1. 65T Main Hook Assembly

• Material: DG20Mn or equivalent alloy steel
• Forging process: Integral die forging
• Safety factor: ≥4 times

2. 25T Auxiliary Hook Assembly

• Structure: Short or long hook available
• Pulley assembly: 5-pulley configuration
• Bearing type: Double-row radial spherical roller bearing

VIII. Maintenance and Care

1. Daily Inspection

• Wire Rope Wear
• Brake Clearance Adjustment
• Structural Component Bolt Tightness
• Lubrication Point Oil Level Check

2. Regular Maintenance

• Monthly Maintenance: Check electrical component contact status
• Quarterly Maintenance: Change reducer oil and check wheel wear
• Annual Maintenance: Comprehensive inspection of structural stress concentration areas

3. Lubrication Requirements

• Lubrication Points: Bearings, gear meshes, wire ropes, etc.
• Lubrication Interval: Determined by operating frequency (generally 200-300 operating hours)
• Lubricant: Lithium-based grease or equivalent

IX. Optional Configurations

The following customized configurations are available based on user requirements:

• Variable Frequency Control System: Enables stepless speed regulation and smooth start-up
• Intelligent Weighing System: Integrated digital display and recording functions
• Anti-sway System: Improves precision positioning during precision lifting
• Special Environment Configurations: Explosion-proof, high-temperature resistant, or corrosion-resistant treatments
• Remote Monitoring System: Enables real-time monitoring of equipment status

X. Technical Data Delivery

After contract signing, the supplier will provide complete technical data, including:

• General assembly drawings and main component diagrams
• Electrical schematics and wiring diagrams
• Operation and maintenance manuals
• Product certification documents
• Instructions for major purchased parts
• Calculations (including structural strength and stiffness calculations)

The 65T/25T double-girder MG hook gantry crane described in this technical data can be customized to meet the user’s actual operating conditions to ensure that equipment performance is perfectly matched to the user’s requirements. The quality management system is strictly implemented in every link of the product from design, manufacturing to installation and commissioning, providing users with safe and reliable material handling solutions.