Semi Gantry Crane for Sale

Product Overview

Semi-gantry cranes are special cranes designed in conjunction with plant structures, combining the advantages of bridge cranes and gantry cranes. One side of it is supported on the track and can run along the track; the other side is supported by the crane support leg, and the end beams at the bottom of the crane support leg run along the track.

Key Features

• Lightweight, Compact Design: A unique single-beam structural design, allowing for a lightweight construction and smaller occupied area.
• Durable Construction: Made from high-quality Q235B or Q345B steel, ensuring long-lasting performance.
• Smooth and Flexible Operation: Features advanced motor and control systems for effortless operation.
• Customizable Options: Available in multiple capacities, spans, and lifting heights to suit specific needs.
• Wide Applicability: Suitable for both indoor and outdoor applications in industries such as construction, logistics, and manufacturing.

Technical Structure

The Semi Gantry Crane by Yuantai Crane features a robust, carefully engineered design consisting of four primary components: the bridge, crane traveling mechanism, lifting mechanism, and electrical system.

1. Bridge

The bridge forms the backbone of the semi gantry crane, comprising the main girder, upper and bottom beams, landing legs, and ladder landing.

Main Girder

• Acts as the main load-bearing structure and runway for the electric hoist.
• Constructed from welded U-steel and I-beam using Q235B or Q345B steel (equivalent to Fe37 or Fe52).
• Features a precise camber (F) ratio of $1/1000$ to $1.4/1000$, with the highest camber at the center of the span ($S/10$).
• Ensures safety with bumpers at both ends of the girder to prevent the hoist trolley from overtraveling.
• Designed to maintain a full-load natural frequency of no less than 2 Hz when the hoist is centered.

Upper and Bottom Beams

• Serve as foundational supports for the main girder and the link to the traveling mechanism.
• Fabricated as box structures from steel plates for strength, rigidity, and lightweight construction.
• Equipped with bumpers to enhance operational safety.
• Upper beams align above the rail, while bottom beams align below, with the latter typically longer to accommodate the landing leg design.

Landing Legs

• Built from welded steel plates with a flange box structure, transitioning from a larger top flange to a smaller bottom flange for enhanced stability against vertical and horizontal loads.
• Designed in an A-frame shape with bolted connections for easy assembly, transport, and storage.
• Ensures stability through angled leg spacing, reducing vibration and improving load balance.

Ladder Landing

• Made from angle steel, flat steel, and round steel, welded to the landing leg for safe, bolt-connected access without the need for on-site welding.

2. Crane Traveling Mechanism

The crane traveling mechanism ensures smooth, reliable horizontal movement with a compact, low-maintenance design.

Motor

• Utilizes ZDY series brake-type motors with integrated brakes for dependable stopping power.
• Mounted above the bottom beam to minimize space usage.

Reducer

• Employs LDAC or LDHC vertical triangle reducers with an open gear drive.
• Compact width eliminates the need for coupling, reducing complexity and wear.

Wheels

• Features LDA-type double-rim wheels, reducing derailment risk and ensuring stable travel on uneven surfaces.
• Includes bolt-connected baffles for easy removal and maintenance.

3. Lifting Mechanism

The crane's lifting mechanism centers on the electric hoist:

• CD/MD-type hoists provide smooth, efficient vertical movement.
• Built-in load limiters prevent overloading, with alarm signals at 90% capacity and a system cutoff at 110%.

4. Electrical System

The electrical system ensures safety and uninterrupted operation with advanced protection features:

Power Supply

• Options include safety slide wire, soft cables, or cable drums for crane feeders.
• Trolley feeders use cable pulleys on wire rope, I-beam, or deformed steel slideways.

Control Modes

• Pendant control for straightforward operation.
• Industrial remote control for flexibility and operator safety.
• Cabin control with buttons, switches, or linkages for comprehensive crane management.
• Dual-control setups available (e.g., pendant + remote) with built-in safety interlocks to prevent simultaneous use.

Safety Features

• Short Circuit Protection: Automatic air-breaker switches protect circuits.
• Voltage-Loss Protection: Prevents automatic crane restart after power restoration.
• Emergency Stop: Red mushroom switches in accessible locations ensure rapid power shutdown.
• Position Limiters: Safeguard crane and hoist movements by preventing overtravel.
• Windproof Clamps: Lock the crane on rails for safe outdoor operation, interlocked with the main power supply.
• Ground Protection: Ensures all metallic components are grounded (resistance ≤ 4Ω) to prevent electrical hazards.

Applications

The Single Girder Semi Gantry Crane is ideal for:

• Outdoor operations at construction sites, warehouses, yards, and stations.
• Industrial environments such as cement factories, hydropower plants, and mechanical assembly plants.
• Loading, unloading, and transporting tasks where space or structural limitations exist.

Safety and Reliability

Yuantai Crane's semi gantry crane design prioritizes safety with:

• Overload Limiters: Alerts at 90% capacity and automatically halts lifting at 110%.
• Position Limiters: Protect against over-travel in lifting or crane movement.
• Windproof Clamps: Prevent accidental movement in outdoor setups.
• Emergency Power Cutoffs: Quick-response systems for emergencies.
• Ground Protection: Comprehensive grounding for all metallic components.

Why Choose Yuantai Crane?

1. Industry Expertise: Decades of experience in crane manufacturing.
2. Customized Solutions: Tailored designs to fit your specific needs.
3. Global Reach: Trusted by customers in Southeast Asia, Europe, Africa, and beyond.
4. Comprehensive Support: From installation to maintenance, we're with you every step of the way.

Contact Us

Ready to elevate your operations with a Single Girder Semi Gantry Crane? Contact us for a customized quote and expert assistance.

• Email: [email protected]
• Phone: +8615003854290
• Website: https://www.yuantaicrane.com/

How to get quotation?

Send us your RFQ including the parameters above, we will reply our quotation accordingly.