Lifting Equipment Single Girder Overhead Crane Price

Specification:

Load Capacity: 1 - 20 ton
Span: 4.5 - 31.5m
Lifting Height: 3 - 30m or according to customer request
Power Supply: based on customer's power supply
Control Method: pendent control, remote control

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How to Install a Single Girder Overhead Crane

The installation of a single girder overhead crane is a precise process that requires planning, technical expertise, and strict adherence to safety standards. Following a systematic approach ensures smooth setup and reliable long-term operation.

Planning and Preparation: Before installation begins, a detailed plan should be developed. This includes evaluating the installation site, verifying the runway beam alignment, and ensuring that sufficient space and safety clearances are available. All necessary tools, lifting equipment, and personnel must be prepared in advance to avoid delays.

Assembling the Crane Components: The next step is assembling the primary components, such as the main girder, end trucks, and hoist. Each part must be inspected for any damage before assembly. Precision is critical during this stage to guarantee proper alignment and stable connections, laying the foundation for reliable operation.

Installing the Runway: The runway system is a vital part of the installation process. Runway beams should be mounted securely on the supporting structure, with accurate spacing and level alignment. Proper installation ensures that the crane travels smoothly and evenly along the entire working length.

Mounting the Crane onto the Runway: Once the runway is in place, the crane is lifted and positioned onto the tracks. The end trucks are carefully aligned with the runway beams to achieve seamless movement. Rigging equipment is used to safely handle the heavy components during this stage.

Electrical Control System Installation: With the mechanical structure complete, the electrical system is installed. This includes power supply lines, wiring, control panels, and safety devices. All connections must comply with electrical codes, and protective features such as overload protection and emergency stops are verified.

Testing and Commissioning: The final stage involves comprehensive testing. Load tests are performed to confirm lifting capacity, and operational checks ensure smooth movement of the hoist, trolley, and bridge. Safety mechanisms are thoroughly inspected to guarantee reliable operation.

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Single Girder Overhead Crane Safety Protection Devices

Safety protection devices play a vital role in the operation of single girder overhead cranes. They ensure safe equipment performance, protect operators, and prevent potential damage to the crane. Below are the common safety devices and their key functions:

Emergency Power Off Switch: Used in emergency situations to quickly disconnect the crane’s main power and control circuits. This switch is typically installed inside the distribution cabinet for easy access.

Warning Bell: Activated via a foot switch, it provides audible alerts to signal crane operation and ensure surrounding personnel remain aware of ongoing work.

Overload Limiter: Mounted on the lifting mechanism, this device issues an alarm when the load reaches 90% of the rated capacity and automatically cuts off power if the load exceeds 105%, thereby preventing dangerous overloads.

Upper Limit Protection: A limit device attached to the lifting mechanism that automatically cuts off power when the hook reaches its maximum lifting height, preventing mechanical damage.

Travel Limit Switch: Positioned on both sides of the bridge and trolley travel mechanisms, it disconnects power when the crane or trolley reaches its travel limit, while still allowing reverse movement for safety.

Lighting System: Provides sufficient illumination for safe crane operation in low-visibility conditions, such as nighttime or poorly lit indoor environments, enhancing both operator safety and overall work efficiency.

Buffer: Installed at the ends of the crane’s metal structure, the buffer absorbs collision energy, reducing impact forces and protecting both the crane and the supporting structure.

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Hoisting Mechanism (Hoists and Trolleys)

The hoisting mechanism is the core component of any overhead crane, responsible for lifting and lowering loads safely and efficiently. In overhead crane systems, the most common hoisting devices are electric hoists and open winch trolleys, with their application depending largely on the crane type and lifting requirements. Generally, single girder overhead cranes are equipped with compact electric hoists due to their lighter structure and lower capacity, while double girder overhead cranes can be paired with either electric hoists or more robust open winch trolleys to meet heavy-duty lifting demands.

Electric hoists, often paired with trolleys, are mounted on the main girder of the crane, enabling both vertical lifting and horizontal load movement across the span of the crane. There are several types of hoists commonly used, including manual chain hoists, electric chain hoists, and wire rope electric hoists. Manual chain hoists are typically chosen for light loads or precise handling tasks. Their simple structure, ease of operation, and low maintenance costs make them suitable for occasional use where efficiency is not the highest priority. In contrast, electric hoists are designed for high-efficiency and frequent operations, offering faster lifting speeds, greater lifting force, and reduced operator effort.

Within electric hoists, wire rope hoists and chain hoists are two widely used variations. Wire rope electric hoists are preferred for applications above 10 tons due to their higher lifting speed, smooth operation, and quiet performance, making them dominant in medium- to heavy-duty industries. Electric chain hoists, on the other hand, feature durable alloy chains, compact structure, and lower cost. They are widely adopted for lighter applications, usually below 5 tons, where space-saving design and affordability are important factors.

For heavier lifting tasks and more demanding industrial applications, open winch trolleys are often the optimal choice. Installed between two main girders, these trolleys use a system of pulleys and wire ropes powered by efficient motors and reducers. Compared to hoist-based systems, open winch trolleys provide stronger traction, smoother load handling, and higher lifting capacities. They are capable of handling very heavy loads with stability and precision, making them a standard solution for steel mills, shipyards, and large-scale manufacturing plants where lifting requirements exceed the capabilities of electric hoists.

By selecting the appropriate hoisting mechanism, whether it is a compact electric hoist for light-duty operations or an open winch trolley for large-scale heavy lifting, industries can ensure efficient material handling, safe crane operation, and reliable long-term performance.