Stone Gantry Crane

A stone gantry crane is a heavy-duty lifting system optimized for the stone industry, capable of handling:

Granite/Marble Slabs (for cutting/polishing)

Large Stone Blocks (quarry extraction & transport)

Monumental Stone Pieces (sculptures, columns)

Construction Stone Elements (precast, cladding)

These cranes are built to withstand abrasive environments and extreme loads (often 20–200+ tons).

 

Types of Stone Gantry Cranes

1. Fixed/Rail-Mounted Stone Gantry Cranes

Used in stone processing plants and warehouses.

Run on rails for precise positioning.

Ideal for slab loading/unloading from cutting machines.

2. Mobile Rubber-Tired Gantry Cranes (RTGs)

Equipped with heavy-duty wheels for outdoor use.

Common in quarries for moving raw stone blocks.

Can be diesel-powered or electric.

3. Semi-Gantry Cranes (One Leg Supported)

One side runs on a wall-mounted rail, the other on ground rails.

Saves space in stone workshops.

4. Overhead Bridge Cranes (for Indoor Stone Work)

Used in stone fabrication factories.

Features vacuum lifters or stone clamps for safe handling.

 

Comparison: Stone Gantry vs. Standard Gantry Crane

Feature	Stone Gantry Crane	Standard Gantry Crane
Load Capacity	20–200+ tons	1–50 tons (typically)
Attachments	Vacuum lifters, stone clamps	Hooks, spreader bars
Environment	Dust/abrasion-resistant	General industrial use
Movement	Rail/Rubber-tired	Rail/Fixed
Precision	High (for fragile stone)	Standard

 

Place of Origin:Henan, China

Warranty:2 years

Weight (KG):60000 kg

Video outgoing-inspection:Provided

Machinery Test Report:Provided

Application:warehouses,factory and other place

Crane type:box type gantry crane

Travelling speed:20m/min

Lifting mechanism:Electric Hoist

Control method:Ground Control+ Remote Control (customized)

Working duty:A5

Working Temperature:-20~+40℃

Industrial voltage:380V50HZ3Phanse or other

Color:Customised

Customization:Accepted

 

Rail-mounted stone gantry cranes are heavy-duty lifting systems designed specifically for handling stone materials in quarries, processing plants, and construction sites. Here's a comprehensive look at their key components:

1. Main Structural Components

Bridge Girder

Heavy-duty box-type or truss construction

Typically spans 10-30 meters for stone applications

Reinforced steel construction (Q235B/Q345B steel common)

Often includes walkways for maintenance access

Support Legs

Rigid or flexible leg designs based on span requirements

Height typically 6-15 meters for stone handling

Equipped with anti-collision buffers at base

May include height adjustment mechanisms

End Carriages

Heavy-duty wheel assemblies (usually 4-8 wheels per leg)

Wheel diameters of 400-800mm common

Include flange guards for rail alignment

Load-bearing capacity per wheel typically 10-30 tons

2. Rail System Components

Running Rails

QU70/QU80/QU100/QU120 steel rails (numbers indicate kg/m weight)

Usually P43 or P50 rail profiles for heavy loads

Rail span typically matches crane span plus 0.5-1m buffer

Rail Fastening System

Fishplates with high-strength bolts (8.8 grade or higher)

Rail clips or elastic fasteners for vibration damping

Rail pads for load distribution

Rail Foundations

Concrete sleepers or continuous concrete foundation

Often includes embedded rail clips or bolt channels

Grade C30 or higher concrete typically used

                                         

3. Lifting Mechanism

Main Hoist

Wire rope hoist (10-200 ton capacity common)

Low-speed design (typically 0.5-5 m/min lifting speed)

Double braking system (mechanical + electromagnetic)

May include auxiliary hoist for lighter loads

Trolley System

Cross travel speed typically 10-30 m/min

Heavy-duty wheel assemblies (4-8 wheels)

Anti-derailment devices

May include maintenance platform

4. Specialized Stone Handling Attachments

Vacuum Lifters

Multiple-pad design (4-16 suction pads)

0.8-1.2 bar vacuum pressure typically

Automatic pressure monitoring system

Emergency backup power for vacuum pumps

Mechanical Clamps

Hydraulic or mechanical operation

Serrated contact surfaces for grip

Load capacity indicators

Quick-change systems for different stone types

5. Drive and Control Systems

Travel Drive

AC frequency-controlled motors (7.5-45kW typical)

Planetary gear reducers (1:30 to 1:50 ratio)

Anti-skid systems for wet conditions

May include rail cleaning brushes

Control System

Pendant control (IP65 rated)

Radio remote control (2.4GHz frequency hopping)

Cabin control option with air conditioning

PLC-based automation available

6. Electrical Systems

Power Supply

Sliding contact line (CMC-3A or similar)

Or cable reel with 10-35mm² cables

380V/50Hz or 440V/60Hz systems common

Emergency power-off systems

Safety Devices

Load moment limiter (95%/100%/110% settings)

Rail end limit switches (both mechanical and proximity)

Anti-collision system for multiple cranes

Windproof anchoring devices (for outdoor use)

.

7. Additional Features for Stone Applications

Dust Protection

IP55 or higher protection for electrical components

Sealed bearing housings

Automatic lubrication systems

Weighing System

Load cell integration (1% accuracy typical)

Digital display in control cabin

Data logging capability

8. Optional Components

Laser Positioning System

±5mm positioning accuracy

Automatic slab alignment

Slab Rotator

90°/180° rotation capability

Hydraulic or electric drive

Automated Storage System

RFID tagging for slab identification

Coordinate-based storage management

Sketch

Main technical

 

1. Heavy Load Capacity

Designed for 20-200+ ton loads, capable of handling massive stone blocks/slabs

Reinforced steel construction withstands impact loads during stone handling

2. Specialized Material Handling

Vacuum lifters prevent surface damage to polished stone

Rotating attachments allow precise positioning (90°/180° rotation)

Spreader beams distribute weight evenly for fragile materials

3. Precision Movement

Low-speed hoisting (0.5-5 m/min) for careful placement

Laser guidance systems (±5mm accuracy) for slab alignment

Anti-sway technology stabilizes loads during movement

4. Durability in Harsh Conditions

Dust-proof electrical components (IP55+ rating)

Abrasion-resistant wheels with sealed bearings

Corrosion protection for outdoor quarry use

5. Space Efficiency

Rail-mounted design maximizes workspace

L-shaped variants available for constrained areas

High vertical clearance (6-15m) for stacked materials

6. Safety Features

Dual braking systems (mechanical + electromagnetic)

Overload protection with audible/visual alarms

Emergency stop with backup power for vacuum lifts

7. Operational Flexibility

Multiple control options: pendant, radio remote, or cabin

Automation-ready with PLC integration

Quick-change attachments for different stone types

 

1. Quarry Operations

Block extraction: Lifting raw stone blocks (granite/marble) from pits

Truck loading: Positioning blocks on transport vehicles

Primary cutting: Moving blocks to sawing stations

2. Stone Processing Plants

Slab handling: Transferring cut slabs between machines

Polishing lines: Precise placement on processing equipment

Quality inspection: Rotating slabs for surface examination

3. Monument Workshops

Sculpture positioning: Adjusting heavy stone artworks

Engraving stations: Precise vertical/horizontal alignment

Monument assembly: Joining large stone components

4. Construction Sites

Cladding installation: Placing facade stone panels

Paving stone placement: Positioning heavy flooring elements

Structural stone: Installing load-bearing stone components

5. Ports and Storage Yards

Container loading: Stacking stone for shipping

Open-yard storage: Organizing blocks in storage areas

Temporary fabrication: On-site stone preparation

 

 

The production procedure for a single beam traveling gantry crane involves several key stages, from design and material procurement to assembly, testing, and final delivery. Below is a step-by-step outline of the typical manufacturing process:

1. Design & Engineering
Customer Requirements Analysis: Determine lifting capacity, span, lifting height, duty cycle, and operating environment.

Structural Design:

Design the main girder (single box or I-beam structure).

Design end carriages (legs/wheels) and runway beams.

Select hoist/trolley type (electric or manual).

Load & Stress Calculations: Ensure compliance with standards (ISO, FEM, DIN, or ASME).

Electrical & Control System Design: Choose motors, brakes, limit switches, and control panels.

2. Material Procurement
Steel Plates & Profiles: High-quality Q235B/Q345B steel for main girders and supports.

Mechanical Components: Wheels, axles, bearings, gears, and couplings.

Electrical Components: Motors, cables, control panels, and safety devices.

3. Fabrication of Main Components
A. Main Girder Fabrication
Cutting: CNC plasma/oxy-fuel cutting for precision.

Welding: Automated submerged arc welding (SAW) for strong seams.

Straightening & Inspection: Ensure proper camber (pre-bend) and check for defects (UT/RT testing).

B. End Carriages & Legs
Frame Assembly: Welded steel construction with reinforced bracing.

Wheel & Bearing Installation: Machined wheels for smooth travel.

C. Hoist & Trolley
Pre-assembled Hoist: Electric chain hoist or wire rope hoist.

Trolley Frame: Fabricated to accommodate hoist movement.

4. Surface Treatment & Painting
Shot Blasting: Removes rust and improves paint adhesion.

Primer & Paint: Anti-corrosion coatings (epoxy + polyurethane).

5. Assembly
Girder & End Carriage Joining: Bolt or weld the main beam to legs.

Hoist/Trolley Installation: Mounted on the girder.

Electrical Wiring: Connect motors, controls, and safety devices.

6. Testing & Quality Control
Dimensional Inspection: Verify span, height, and alignment.

Load Testing:

Static Load Test: 125% of SWL (Safe Working Load).

Dynamic Load Test: 110% of SWL with operational checks.

Functional Tests: Travel, lifting, braking, and limit switch verification.

7. Disassembly & Packaging
For Shipment: Crane may be disassembled into modules (girder, legs, hoist).

Protective Packaging: Waterproof wrapping for sea transport.

8. Installation & Commissioning (On-Site)
Runway Preparation: Ensure level rails or ground support.

Reassembly: Bolt components together.

Final Testing: Operational checks under load.

9. Documentation & Delivery
Manual & Certificates: Include load test reports, CE/ISO certifications.

Training: Operator and maintenance guidance.

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%.