جرثقیل های سقفی ملاقه: راه حل های قابل اعتماد حمل و نقل فلز داغ برای کارخانه های فولادی

معرفی محصول

The ladle overhead crane (also known as a foundry overhead crane) is a specialized lifting device designed for handling and transferring molten metal. It is mainly used for charging converters with hot metal, transporting ladles to refining furnaces, and delivering ladles to the rotating table of a continuous casting machine, completing key steps in the steelmaking process. Built for the extreme conditions of smelting workshops, it is designed to withstand high temperatures, heavy dust, and exposure to molten metal. The crane typically consists of a main trolley, auxiliary trolley, bridge structure, traveling mechanisms for both the crane and trolley, a gantry hook lifting system, and an electrical control system. It can be operated via a cabin or remote control.

The ladle overhead crane is suitable for working environments ranging from -10℃ to +60℃, with a typical work duty of A7 to meet the high-frequency and heavy-load demands of the metallurgical industry. Various optional features can be integrated based on specific operational needs, such as a rotatable lifting device for enhanced flexibility, an adjustable gantry hook to accommodate different ladle sizes, and a load weighing and display system for precise control and safety monitoring.

Ladle overhead cranes come in different structural designs, including two-girder two-rail, four-girder four-rail, and four-girder six-rail configurations, to meet different capacity and operational requirements.

Suitable for medium and small capacity lifting, it is mostly used for loads of 140t or less. The bridge adopts a double-girder double-rail structure and is usually equipped with a single trolley hoisting system, featuring both main and auxiliary hoisting mechanisms.

Suitable for large-capacity lifting, it is typically used for loads of 160t or more. The bridge adopts a four-girder four-rail structure with main and auxiliary trolleys, both running on double rails. The electrical room is located inside the main girder.

Suitable for ultra-large capacity lifting, typically for loads of 320t or more. The bridge features a four-girder six-rail structure with main and auxiliary trolleys. The main trolley runs on four rails, distributing wheel pressure, improving load-bearing conditions, and enhancing structural stability. The electrical room is in the main girder.

امکانات

• The crane is primarily used for lifting and transporting molten metal, requiring a high-duty classification and extremely stringent safety standards.
• A heat insulation layer is installed at the bottom of the main girder to prevent high-temperature radiation from affecting the girder’s structural integrity.
• Both the operator’s cabin and electrical room are fully insulated, with cooling systems inside the cabin to ensure the proper functioning of operators and electrical equipment.
• The wire rope is made of high-temperature-resistant steel-core wire rope.
• The pulley block on the hook group or lifting device, as well as the fixed pulley group on the trolley, adopts a fully enclosed design to withstand operations in high-dust environments.
• All motors have an insulation rating of H-class and a protection rating of IP54. Additionally, an overspeed switch is installed on the main hoisting motor to ensure that in case of a failure, the emergency brake on the drum end engages quickly.
• Two brakes are installed at both ends of the high-speed shaft of the hoisting reducer, and a safety disc brake is mounted at one end of the drum.
• The hoisting drum is a welded type, and most pulleys are rolling pulleys.
• The main hoisting mechanism adopts a dual-drive system. If one motor or electrical control system fails, the other drive system ensures that the crane can complete one full work cycle at the rated load.
• A safety monitoring system is installed on the hoisting mechanism.
• If the rated load does not exceed 16 tons, an electric hoist can be used as the hoisting mechanism. The electric hoist must have a duty classification of no less than M6. In addition to a working brake, a safety brake is installed on the low-speed stage of the electric hoist. If the working brake fails or a transmission component breaks, the safety brake reliably holds the rated load, preventing accidents.

جزئیات محصول

The main beam’s bottom has a thermal insulation layer to prevent heat radiation.

The cab has a fully heat-insulated structure with a thermal layer and an industrial air cooler.

The pulley block has a fully enclosed guard with dust discharge holes at the bottom to prevent debris from causing the pulleys to jam.

With main and auxiliary hooks, the main lifts molten metal, while the auxiliary handles tipping or lifting small items. The main hook is usually a gantry hook with a heat shield under the beam.

The main hoisting mechanism has a safety brake to prevent the ladle from accidentally falling in case of loss of control.

The motor insulation is H-class, with an IP54 protection rating.

Steel core wire ropes are used, offering higher load capacity, safety, and heat resistance compared to fiber core wire ropes used in ordinary cranes.

Technical Specifications

Why Choose Dafang Crane Ladle Overhead Cranes

In the field of ladle overhead cranes, we offer the following advantages:

• High Cost-Effectiveness: Dafang Crane is a manufacturer of ladle overhead cranes, eliminating middlemen and offering the most competitive prices to customers. We also provide spare parts and wear components at discounted rates for future maintenance needs.
• Fast Delivery: With a modern manufacturing facility covering 850,000 square meters and over 2,600 sets of equipment, including welding robots, CNC machining centers, and laser cutting machines, we ensure rapid production and stable supply.
• Superior Quality: Our products strictly adhere to the ISO9001 quality management system. We utilize advanced submerged arc welding technology and implement rigorous quality control measures to ensure that every component and production step undergoes precise inspection, delivering highly reliable crane equipment.
• Advanced Technology: We are certified to manufacture large-tonnage ladle overhead cranes, including four-girder four-track and four-girder six-track configurations. Our team of professional engineers employs 3D modeling and finite element analysis (FEA) to optimize the structural strength of key load-bearing components.
• Extensive Experience: With nearly 20 years of expertise in designing and manufacturing ladle handling cranes, we have established a strong reputation for advanced technology, strict quality control, and exceptional customization capabilities. Our products are widely used both domestically and internationally.

Below are some of our project cases:

150/50T Two-Girder Ladle EOT Crane for Steel Mills

• Capacity: 150/50t
• دهانه: 25.5 متر
• Lifting height: 25m (main hook), 27m (auxiliary hook)
• وظیفه کاری: A7
• Power: 380V, 50Hz, 3ph
• حالت کنترل جرثقیل: کنترل با کابین
• Price: $370,000

• A thermal insulation layer is installed at the bottom of the main girder. Its spacious and well-sealed interior allows easy installation, maintenance, and dust protection for the crane’s running mechanism and electrical equipment.
• The enclosed, insulated cab features tempered glass, an adjustable seat, a wide view, and air conditioning for heating and cooling.
• The crane runs on a four-corner drive system, with four drive units symmetrically installed. Each unit includes a motor, brake, reducer, and trolley set. The motor, brake, and reducer are enclosed in the main girder to withstand high temperatures and dust.
• The main hoist, designed for molten metal handling, uses a dual-drive system with four wire ropes. If one drive fails, the other ensures a full working cycle at the rated load. If one or two diagonal ropes break, the load can still be safely lowered.
• The auxiliary hoist has a single-drive system for tilting molten metal or lifting smaller loads.
• The trolley runs on a two-corner drive system with a motor, brake, reducer, and wheel set.
• The electrical room is insulated inside the main girder, cooled by an industrial air cooler to keep the temperature below 35°C. The walkway floor is covered with non-conductive rubber mats.
• Uses forged or rolled wheels.
• The main hoist has a gantry hook with a heat shield beneath the hook beam to reduce thermal radiation effects.

20/20T Two-Girder Ladle Overhead Crane for Cast Pipe Plant

• Capacity: 20/20t
• Span: 19m
• ارتفاع بلند کردن: 18 متر
• وظیفه کاری: A7
• Power: 380V, 50Hz, 3ph
• حالت کنترل جرثقیل: کنترل با کابین
• Price: $85,000

• All crane wiring is high-temperature resistant, with flexible flat cables made of multi-strand fine copper wire for moving parts.
• The cab features tempered glass, double-layer insulation, an industrial air conditioner, and a fire extinguisher.
• The main pulley cover is fully enclosed with a plate thickness of at least 8mm.
• The hook assembly is fully enclosed.
• The drum assembly includes a safety brake.
• The hoisting mechanism has dual limit switches: rotary limit and counterweight limit.
• A laser anti-collision alarm is installed, with voice alerts in the cab.
• Both main and auxiliary hooks are equipped with load sensors.
• A safety monitoring system is installed, covering load weight, lifting height, travel distance, overspeed protection, interlock protection, anti-collision, braking status, operation commands, and working time monitoring and recording.

50/10T Two-Girder Steel Mill Ladle Bridge Crane

• ظرفیت: 50/10 تن
• دهانه: 25.5 متر
• Lifting height: 25m(main hook), 27m(auxiliary hook)
• وظیفه کاری: A7
• Power: 380V, 50Hz, 3ph
• حالت کنترل جرثقیل: کنترل با کابین
• Price: $88,000

• This equipment adopts a double-girder, double-rail structure with a single-trolley hoist.
• A thermal insulation device is installed at the bottom of the main girder.
• The hoist trolley includes independent main and auxiliary hoisting mechanisms, each with its own transmission system. They can operate separately for lifting or work together for equipment flipping.
• The crane runs on a two-corner drive wheel system. Rail sweepers are installed at the wheel ends to automatically clear obstacles, ensuring safe movement.
• The hook is forged from DG20Mn steel, P-grade.
• Pulleys are made of cast steel or rolled steel.
• The drum is made of cast steel ZG230-460 or welded Q345-B.
• Steel core wire ropes are used.
• The hoisting mechanism is equipped with two independent brakes.
• The hoisting reducer is a medium-hard gear surface type.
• H-class insulated motors are used, featuring good sealing and IP54 protection rating.