double crane

Types of double cranes

A double girder crane can be divided into two types, based on its rated lifting capacity: small-sized double cranes and large-sized double cranes.

• Small-sized double crane

Small-sized double cranes usually refer to those whose lifting capacity is below 5 tons. Due to their compact sizes and lighter weights, they are particularly suitable for working in confined spaces and low-weight-bearing sites. Moreover, small double cranes are more maneuverable and convenient to transport and move. Common small double crane models include the QTZ31.5 and QTZ40.

• Large-sized double crane

Large-sized double cranes are those with a lifting capacity greater than 5 tons. Compared with small double cranes, large double cranes have stronger lifting capabilities and are suitable for heavy lifting tasks in high-rise construction, bridge construction, and other large-scale engineering projects. In addition to a higher lifting capacity, large double cranes also have a wider working range and better stability. Common large double cranes include the QTZ63, QTZ80, QTZ125, and QTZ160, to name a few.

Specifications and maintenance of double cranes

• Specification

Capacity: The maximum weight the double crane can lift is normally indicated by the lifting capacity, which is measured in metric tons (MT) or tonnes. Double cranes typically have a wide range of lifting capacities, from smaller ones around 1-5 MT to very large ones of 100 MT or more.

Span: This refers to the horizontal distance between the supports of the double girder crane. The span of a double crane can vary widely, depending on the specific needs of the application. Double cranes with smaller spans are usually used in workshops for material handling, while those with larger spans are often used in warehouses or outdoor storage areas to provide greater coverage.

Lift height: This is the vertical distance the double crane can lift. The lift height of a double crane is determined by factors such as the length of the vertical column and the length of the jib or boom. Double cranes with longer lift heights are often used in construction projects where materials need to be lifted to higher levels.

Power supply: Double cranes are powered by different sources, including electricity, hydraulic power, and internal combustion engines. Electric-powered double cranes are commonly used in indoor settings and offer quiet operation and clean energy. Internal combustion engine-powered double cranes are utilized in outdoor environments with no power source, and they provide greater mobility. Hydraulic double cranes offer smooth and precise control and are used for specialized applications.

• Maintenance

Regular inspections: Regularly inspect the overall condition of the double crane, including its structural components, lifting mechanisms, electrical systems, and safety devices. Check for any signs of wear, damage, or malfunction. This can help identify and address potential issues promptly, ensuring the double crane's safe and reliable operation.

Cleaning and lubrication: Clean the surface of the double crane and remove any dirt, dust, or debris that may have accumulated. Also, apply lubricant to the moving parts of the double crane, such as the joints, bearings, and ropes, to reduce friction and wear. Proper cleaning and lubrication can help extend the service life of the double crane and maintain its performance.

Safety practices: Always follow recommended safety practices when operating and maintaining the double crane. This includes wearing appropriate personal protective equipment, following proper operating procedures, and avoiding risks such as overloading or improper use. Safety is paramount for both the operators and the equipment itself.

Applications of double cranes

Double cranes are used in applications where there are heavy lifting and movement requirements. Here are some of the applications of double cranes:

• Industrial manufacturing:

The double girder overhead crane is a type of crane that is commonly used in industrial manufacturing. It can lift and move heavy materials, such as steel plates, machinery parts, and equipment. The double overhead crane is usually installed in the workshop or warehouse, where it plays an essential role in the production process. By using the double overhead crane, workers can handle heavy materials more safely and efficiently.

• Mining industry:

In the mining industry, double cranes can be used to lift and transport materials in mines, such as ore, coal, and rock. They are typical equipment in open-pit mining, underground mining, and port terminals. The double cranes can help mining companies improve operational efficiency and ensure the safety of material handling.

• Construction sites:

Double cranes are widely used in various construction sites. They can handle tasks such as lifting and transporting heavy building materials, prefabricated components, and equipment. There are several types of double cranes that are commonly used in the construction industry, such as tower cranes, crawler cranes, and gantry cranes. The double cranes can help construction workers complete high-altitude and heavy-duty lifting operations.

• Logistics and warehousing:

Double cranes play an essential role in the logistics and warehousing industry. They can efficiently sort, stack, and transport goods in distribution centers, warehouses, and freight yards. Double cranes are typical equipment in the logistics industry, such as bridge cranes, stacker cranes, and pallet cranes, etc. By using double cranes, companies can improve warehouse management efficiency and accelerate the flow of goods.

• Agriculture and food:

Double cranes are also used in agriculture and food processing. They can be used to handle agricultural products, such as grain, fruits, and vegetables, as well as assist in the processing and packaging of food products. Double cranes improve the efficiency of agricultural production, food processing, and transportation of goods in these industries.

• Automotive industry:

Double cranes are widely used in the automotive industry. They can be used for the assembly and production of automotive parts, as well as the handling of vehicles and components. Double cranes can help improve operational efficiency and ensure the safety of material handling in the automotive industry.

How to choose double cranes

When looking for suitable double cranes for customers' needs, it is important to consider the following key aspects:

• Application

Customers should first determine the purpose of the double girder eot cranes. If the client is using it for the construction of high-rise buildings, it is better to choose a double crane with a high lifting capacity. If the client is using it in a warehouse, yard, or factory, it is better to choose a double crane with a wide working radius and excellent maneuverability.

• Performance

Check the performance of the double cranes, such as the maximum lifting capacity, working radius, lifting height, and working speed, and select the one that meets the customer's operational requirements.

• Quality and reliability

Choose a double girder gantry crane with a reliable performance and long service life. It is also important to consider the maintenance requirements and availability of replacement parts of the double cranes.

• Operation convenience

Choose a double crane that is easy to operate and control, and with a comfortable operating environment, which can improve work efficiency and reduce the fatigue of the operator.

• Environmental protection and energy conservation

Choose a double crane that meets the environmental protection requirements and has efficient energy utilization, which can reduce energy consumption and environmental impact.

• Support and service

Check the after-sales support and services provided by the supplier, such as technical support, maintenance services, and spare parts supply, and choose a supplier that can provide timely and effective support.

Double crane Q&A

Q1: What are the advantages of using a double crane?

A1: With the capability to lift and move heavy loads, double cranes improve operational efficiency. They provide a stable lifting platform, which ensures that the loads are securely lifted and positioned. They also reduce manual handling and improve safety in industrial settings.

Q2: What is the recommended maintenance procedure for a double overhead crane?

A2: The recommended maintenance schedule for a double overhead crane is as follows:

A daily inspection that involves checking for any abnormal sounds, loose connection of the electric appliance, and abnormal phenomena of the steel wire rope should be done. A monthly inspection of the electric hoist should be carried out. Lubricate the moving parts and inspect the wire ropes for any signs of wear or damage. Quarterly inspection of the crane's performance should also be done. This includes checking the brakes, limit switches, and electrical systems. Finally, an annual inspection by a qualified technician should be performed to ensure compliance with safety and operational standards.

Q3: Can a double girder crane be customized for specific applications?

A3: Yes, double girder cranes can be customized for specific applications. Customers can choose specific lifting capacities, span lengths, and lifting mechanisms to suit their unique needs. They can also request additional features such as automation, remote control systems, or specialized attachments.

Q4: What are the key safety considerations when operating a double overhead crane?

A4: The key safety considerations are. Ensure that the crane is properly inspected before each use to identify any potential hazards or maintenance needs. Provide adequate operator training to ensure that they are familiar with the controls, operating procedures, and safety protocols. Maintain clear communication between operators and ground personnel. Operators should have a clear line of sight when moving loads. Finally, establish and enforce load capacity limits and operational guidelines to prevent overloading and unsafe practices.