A double girder gantry crane is a type of crane that consists of two parallel girders supported by a gantry framework. It is commonly used in industrial and construction settings for lifting and moving heavy loads. The primary advantage of a double girder gantry crane is its superior lifting capacity compared to a single girder gantry crane.
Here are some key features and characteristics of double girder gantry cranes:
- Structure: The crane is supported by a gantry framework, which is typically made of steel. The two girders are positioned horizontally and run parallel to each other. The girders are connected by cross beams, forming a stable and rigid structure.
- Lifting Mechanism: The lifting mechanism of a double girder gantry crane typically consists of a hoist or trolley that moves along the girders. The hoist is responsible for lifting and lowering the load, while the trolley provides horizontal movement across the span of the crane.
- Increased Lifting Capacity: Double girder gantry cranes are designed to handle heavier loads compared to single girder cranes. The double girder configuration provides better stability and structural integrity, allowing for higher lifting capacities.
- Span and Height: Double girder gantry cranes can be customized to fit specific requirements. The span refers to the distance between the two gantry legs, and the height refers to the lifting height. These dimensions are determined based on the intended application and the size of the loads to be lifted.
- Versatility: Double girder gantry cranes are versatile and can be used in various industries such as construction, manufacturing, logistics, and shipping. They are commonly employed in locations where overhead cranes are not feasible or practical.
- Control Systems: Double girder gantry cranes can be operated using various control systems, such as pendant control, radio remote control, or cabin control. The control system allows the operator to precisely control the crane’s movements and lifting operations.
- Safety Features: Double girder gantry cranes are equipped with safety features to ensure safe operation. These may include overload protection, emergency stop buttons, limit switches, and audible alarms.
It’s important to note that the specifications and capabilities of a double girder gantry crane can vary depending on the manufacturer and specific model. When considering the use of a double girder gantry crane, it is recommended to consult with a qualified engineer or crane supplier to ensure that the crane meets your specific requirements and safety standards.
Besides, here are some additional details about double girder gantry cranes:
- Lifting Capacity: Double girder gantry cranes are known for their high lifting capacities, making them suitable for handling heavy loads. They can typically lift loads ranging from a few tons to several hundred tons, depending on the specific model and configuration. The lifting capacity is influenced by factors such as the span, height, and structural design of the crane.
- Clear Span: The clear span of a double girder gantry crane refers to the distance between the centers of the two gantry legs. This dimension determines the maximum width of the workspace beneath the crane. The clear span can be customized to accommodate the specific layout and requirements of the working area.
- Bridge Traveling Mechanism: The bridge traveling mechanism enables the horizontal movement of the crane along the gantry framework. It consists of motors, gears, and wheels that allow the crane to travel smoothly and precisely across the entire span. The traveling mechanism is often driven by electric motors, and some advanced models may incorporate variable frequency drives (VFD) for improved control and energy efficiency.
- Hoisting Mechanism: The hoisting mechanism of a double girder gantry crane is responsible for lifting and lowering the load. It typically utilizes an electric hoist or trolley, which can run along the girders. The hoist may feature multiple lifting speeds to accommodate different load requirements.
- Duty Classification: Double girder gantry cranes are designed to handle various duty cycles based on the intensity and frequency of their use. Duty classifications are categorized as light, medium, heavy, or severe, and they determine the crane’s ability to handle loads continuously or intermittently.
- Outdoor and Indoor Applications: Double girder gantry cranes can be used both indoors and outdoors, depending on the specific requirements. Outdoor gantry cranes are designed with weather-resistant features, such as protective coatings, to withstand exposure to environmental elements. Indoor gantry cranes are often used in manufacturing facilities, warehouses, and workshops.
- Customization Options: Manufacturers offer a range of customization options to tailor double girder gantry cranes to specific applications. These options may include features like auxiliary hoists, specialized lifting attachments, anti-sway systems, and advanced control systems. Customizations can enhance the crane’s performance and efficiency for specific tasks.
- Installation and Maintenance: Installing a double girder gantry crane requires careful planning and expertise. It involves considerations such as ground preparation, foundation requirements, and assembly of the gantry structure. Regular maintenance and inspections are necessary to ensure the crane’s safe and efficient operation. Crane manufacturers often provide guidelines and support for installation, maintenance, and troubleshooting.
Remember that specific details and features may vary depending on the manufacturer and model of the double girder gantry crane. It’s essential to consult with industry professionals or crane suppliers who can provide accurate information based on your specific needs and circumstances.
