MH Tyre Single Girder Gantry Crane

What is an MH Tyre Single Girder Gantry Crane?

An MH Tyre Single Girder Gantry Crane is a mobile, self-supporting gantry crane characterized by its single main girder and rubber tires for mobility. The "MH" designation typically stands for "Moderate to Heavy Duty," indicating it is built for regular, frequent use in industrial applications, handling significant loads with the flexibility of easy relocation.

Think of it as a robust, mobile workhorse that can be driven to different locations in a factory, warehouse, or outdoor yard to handle heavy lifting tasks wherever they are needed.

 

Advantages of MH Tyre Single Girder Gantry Cranes

High Mobility and Flexibility: The rubber tires allow the crane to be driven anywhere within a facility or yard, providing lifting capability exactly where it's needed.

Cost-Effectiveness: The single girder design is more economical than a double girder crane, both in initial investment and maintenance.

Easy Installation & Relocation: No need for fixed rails or foundations. The crane can be quickly put into service and easily moved to a new location.

Low Headroom: The under-hung hoist design maximizes the available lifting height under the beam.

Excellent Value for Duty Cycle: Offers the perfect balance of performance and cost for frequent, medium-duty lifting tasks.

 

Comparison: MH Tyre Single Girder vs. Rail-Mounted Gantry

Feature	MH Tyre Single Girder	Rail-Mounted Gantry
Mobility	High - Rubber Tires	Low - Fixed Rails
Flexibility	Can be driven anywhere	Confined to rail path
Infrastructure Cost	Lower (no rails needed)	Higher (requires rail installation)
Precision & Stability	Good	Superior
Ideal For	Flexible, multi-location lifting	Repetitive, fixed-path lifting

Conclusion: The MH Tyre Single Girder Gantry Crane is a highly practical and cost-effective solution for businesses that need a mobile, reliable, and robust lifting partner. Its combination of mobility, strength, and versatility makes it an indispensable tool for enhancing productivity in various industrial and logistical settings where fixed infrastructure is not desirable or practical.

 

Lifting Capacity 320 tons
Span (Width) 3 - 12 meters (adjustable)
Lifting Height 3 - 10 meters
Working Class A3-A5 (light to medium duty)
Hoisting Speed 0.5 - 8 m/min (variable)
Main Beam Type Single/double girder (box-type)
Power Supply 220V/380V 3-phase or manual
Control Mode Pendant control/wireless remote
Hoist Type Electric chain hoist/wire rope hoist
Travel Drive Manual push or motorized
Corrosion Protection Hot-dip galvanized or marine-grade paint
Wind Resistance Up to Beaufort scale 6 (for outdoor use)
Operating Temp -20°C to +50°C

Here is a detailed breakdown of the components of an MH Single Girder Gantry Crane.

 

1. Primary Structural System (The Framework)

Single Main Girder: The primary horizontal load-bearing beam.

I-Beam: A standard rolled steel section, cost-effective for lighter loads and shorter spans.

Welded Box Girder: Fabricated from steel plate for superior strength and rigidity. Used for higher capacities (closer to the 20-ton MH limit) and longer spans to minimize deflection.

Legs (End Trucks): The vertical supports at each end of the girder.

Can be fixed height or adjustable (telescopic or with pin settings).

House the wheels, axles, and often the drive motors for long travel.

Runway System: The path the crane follows.

For Rail-Mounted Cranes: Steel rails mounted on a solid foundation.

For Rubber-Tired Cranes: A smooth, hard surface is sufficient.

Bracing: Diagonal steel members between the legs and the girder. These are critical for providing lateral stability and preventing the crane from racking or swaying.

2. Lifting & Travel System (The Workhorse)

Electric Hoist Unit: The component that performs the lifting. For an MH class crane, this is a robust, industrial-grade hoist.

Hoist Motor: Electric motor designed for frequent starts and stops.

Gearbox: Reduces motor speed to increase lifting torque.

Drum or Sprocket: For winding wire rope or lifting chain.

Brake: Automatically engages to hold the load when the hoist is not powered.

 

Trolley Assembly: The unit that carries the hoist along the girder.

Trolley Frame: Supports the hoist.

Trolley Wheels: Run along the bottom flange of the main girder.

Trolley Drive: Motor and gears that propel the trolley. Can be electric or manual.

Lifting Hook: Forged steel hook with a safety latch to prevent slings from disengaging.

Travel Drives (Long Travel): The system that moves the entire crane.

Drive Motors: Mounted on the end trucks.

Wheels: Flanged for rails or solid rubber for floor use.

 

 

3. Power & Control System (The Nerves)

Power Supply:

Cable Reel: A spring- or motor-driven reel that manages the main power cable.

Festoon System: A trolley and track system that carries and manages the power and control cables.

Control Interface:

Pendant Station: A hanging push-button control box allowing the operator to control all crane functions.

Radio Remote Control: Allows wireless operation from a safe and optimal location.

Control Panel: Houses electrical components like contactors, overload relays, and sometimes a Variable Frequency Drive (VFD) for smooth control.

 

 

4. Safety Systems (The Lifeline)

Load Limiter / Load Moment Indicator (LMI): Prevents the hoist from lifting a load beyond its rated capacity. An LMI is more advanced and provides a readout.

Limit Switches:

Hoist Upper/Lower Limit Switches: Automatically cut power at the extremes of hook travel.

Travel Limit Switches: Stop the crane or trolley at the end of the runway or girder.

Braking Systems:

Hoist Brake: Holds the load.

Travel Brakes: On the drive motors for controlled stopping.

Bumpers & End Stops: Rubber or polymer buffers to absorb impact energy at the end of travel.

Warning Device: A horn or buzzer to alert personnel when the crane is in motion.

Summary: Key Features of an MH Type

Component	MH Type Single Girder Characteristic
Girder	Robust I-Beam or Welded Box Girder (heavier than light-duty MZ types)
Hoist	Industrial Electric Hoist rated for M4/M5 duty cycle
Legs	Reinforced with bracing for stability under load
Control	Reliable Pendant or Radio Remote
Safety	Includes Load Limiter and Limit Switches as standard

SKETCH

 

Main technical

 

Advantages of MH Single Girder Gantry Crane

This crane is engineered to deliver optimal performance for moderate to heavy-duty tasks, offering a compelling set of benefits.

 

1. Superior Cost-Effectiveness

Lower Initial Investment: The single girder design requires less material and a simpler hoist system than a double girder crane, resulting in a significantly lower purchase price.

Reduced Operating Costs: It offers the perfect balance of price and performance for applications that are too demanding for a light-duty crane but do not justify the high expense of a double girder model.

2. Excellent Versatility and Adaptability

Wide Application Range: Suitable for a vast array of tasks, from moving machinery to loading trucks.

Indoor and Outdoor Use: Can be installed in factories, warehouses, and outdoor yards.

Adjustable Features: Many models offer adjustable span and height, allowing them to be configured for different spaces and tasks.

3. Space Efficiency

Low Headroom Design: The under-running hoist maximizes the available lifting height under the beam, which is crucial in facilities with low ceilings.

Clear Floor Space: Like all gantry cranes, it operates overhead, keeping the floor space free for other equipment, storage, and traffic.

4. Ease of Installation and Use

Simple Assembly: The structure is less complex than a double girder crane, making it quicker and easier to install.

Portability: Rubber-tired models can be easily moved to different locations within a facility as needed.

User-Friendly Operation: Simple controls via pendant or radio remote require minimal operator training.

5. Reliable Durability for its Class

Built for Frequent Use: With an M4 (Moderate Duty) or M5 (Heavy Duty) classification, it is constructed from robust components designed to withstand regular, frequent use.

Long Service Life: Properly maintained, an MH type crane provides years of reliable service with minimal downtime.

Applications of MH Single Girder Gantry Crane

The MH Single Girder Gantry Crane is a versatile workhorse found in numerous industries where reliable and efficient lifting is required.

 

1. Manufacturing and Assembly Plants

Moving Raw Materials: Transporting steel, aluminum, and other materials to production lines.

Handling Components: Lifting machine parts, weldments, and sub-assemblies between workstations.

Loading Finished Goods: Placing completed products onto trucks for shipment.

2. Warehousing and Logistics Centers

Loading/Unloading Trucks: Efficiently moving heavy palletized goods that exceed forklift capacity.

Stacking and Storage: Rearranging heavy items in a warehouse or storage yard.

3. Construction Sites and Outdoor Yards

Handling Building Materials: Lifting steel rebar, pipes, concrete forms, and scaffolding.

Yard Management: Moving and organizing materials like lumber, steel profiles, and machinery in outdoor storage areas.

4. Shipping Docks and Loading Bays

General Cargo Handling: Loading and unloading non-containerized cargo from trucks and railcars.

Feeding Production Lines: Moving materials from receiving docks to the start of a manufacturing process.

5. Maintenance and Repair Shops

Equipment Servicing: Lifting engines, transmissions, and heavy components out of vehicles and machinery for overhaul.

Factory Maintenance: Replacing heavy machine tools, molds, and press tools.

The production procedure for an MH Single Girder Gantry Crane is a systematic process that ensures the final product is safe, reliable, and built for moderate to heavy-duty service. Here is a detailed breakdown.

 

Stage 1: Design & Engineering

This stage defines the crane's specifications and creates the blueprint for production.

Client Requirements Analysis: Reviewing key parameters: capacity, span, lifting height, power source, control method, and mobility type (rail-mounted or rubber-tired).

Structural & Mechanical Design:

Structural Analysis: Calculating loads and stresses to determine the appropriate girder size (I-beam or box girder) and leg design.

Component Selection: Specifying the hoist, trolley, drive motors, wheels, and gearboxes from trusted suppliers.

Electrical Design: Creating schematics for power supply, motor controls, and safety circuits.

Bill of Materials (BOM) Creation: Listing all raw materials and purchased components.

 

Stage 2: Material Procurement & Preparation

Procurement: Sourcing steel beams, plates, and purchased components (hoists, motors, electrical gear).

Material Preparation: Steel components are cut to length using saws or CNC plasma cutters. Holes are drilled or punched for bolts and connections.

 

Stage 3: Structural Fabrication & Assembly

This is where the crane's frame is built.

Girder Fabrication:

For I-beam girders: Preparing and reinforcing standard I-beams if necessary.

For box girders: Cutting web and flange plates, welding them together with internal stiffeners.

Leg & End Truck Fabrication: Constructing the vertical supports and end trucks that house the wheels and drives.

Welding: All structural connections are welded by certified welders. Critical welds may be inspected via ultrasound.

Machining: Machining mounting surfaces for rails and drives to ensure proper alignment.

 

Stage 4: Mechanical Assembly

The structural frame is combined with the mechanical systems.

Frame Assembly: The main girder is connected to the legs, forming the basic gantry structure. Bracing is installed for stability.

Wheel & Axle Installation: Wheels are mounted to the end trucks. Axles and drive components are installed for powered travel.

Trolley Assembly: The trolley frame is built, and wheels are attached. The hoist unit is then mounted onto the trolley frame.

Hook Attachment: The hook block is attached to the hoist's wire rope or chain.

 

Stage 5: Electrical & Control System Installation

Wiring: Electrical cables are run along the crane structure to the travel motors, hoist motor, and control points.

Control System Installation: The pendant control station or radio receiver is installed and wired. Control panels with contactors and overload protection are mounted.

Power Supply Setup: Installation of the cable reel, festoon system, or conductor bars for power delivery.

Safety Devices: Installing and wiring limit switches, emergency stops, and overload protection devices.

 

Stage 6: Works Testing & Inspection (FAT - Factory Acceptance Test)

The fully assembled crane is tested to ensure it meets all specifications and safety standards.

Visual Inspection: Checking for workmanship, proper welding, and correct assembly.

No-Load Test: Operating all motions (hoisting, trolley travel, gantry travel) without a load to check for smooth operation and abnormal noise.

Load Testing:

Static Load Test: Lifting a test load of 125% of the rated capacity and holding it to verify structural integrity and brake holding capacity.

Dynamic Load Test: Lifting 110% of the rated capacity and running it through all motions to ensure performance under working conditions.

Safety Function Test: Verifying the operation of all limit switches, brakes, E-stops, and overload protection devices.

 

Stage 7: Dismantling, Painting & Packaging

Dismantling: The crane is partially disassembled into logical sections (girder, legs, trolley) for shipping.

Painting: All components are painted with a primer and topcoat for corrosion protection.

Packaging: Components are securely packaged, with special attention to protecting machined surfaces, threads, and electrical components.

 

Stage 8: Site Installation & Commissioning (SAT - Site Acceptance Test)

Site Erection: The crane is reassembled on the customer's site.

Final Connections: Electrical power is connected, and final checks are made.

Site Commissioning & SAT: The crane undergoes a final operational test in its actual working environment.

Operator Training: The customer's operators are trained on safe and efficient use.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.