Electromagnetic Door Crane

 

 

Electromagnetic Door Crane is a large material handling equipment widely used in open-air sites, warehouses, docks and other environments for lifting heavy objects. It consists of two main beams and support legs to form a "gate"-shaped structure, which can run on ground tracks and is suitable for large-span, large-tonnage heavy-duty material handling operations. Compared with single-beam gantry cranes, double-beam structures have stronger bearing capacity, larger spans and wider adaptability.

The double-beam structure of this crane can provide higher strength and rigidity, suitable for long-term high-intensity operations. It usually adopts a box-type or truss structure, which is designed according to the specific usage scenario, and a trolley running track is arranged on the main beam. Two vertical legs are connected to both ends of the main beam to play a supporting role, and running wheels are installed at the bottom of the legs, which can move on the ground track. The legs are designed to be sturdy and can withstand external influences such as wind to ensure stability.

3) Electromagnetic Door Cranes can be designed with larger spans to meet the use needs of large areas. Compared with single-beam cranes, Electromagnetic Door Cranes have a more stable structure and can better cope with complex environments. It can be used in a wide range of applications, including open-air sites, warehouses, cargo yards, docks, construction sites, etc. Equipped with an advanced control system, it can be operated manually, remotely, automatically, etc. to improve work efficiency.

Core Components：Bearing, Gearbox, Motor

 

Condition：New

Warranty：1 Year

Weight (KG)：20000 kg

Feature：Gantry Crane

Application：Outside/outdoor industrial

Rated Lifting Moment：Different

Crane working class：A5, A6

Crane painting color：As client's demand, generally red, yellow, blue, etc.

Weight overload protection：Included

Lifting mechanism：Electric Winch

 

 

 

1.Main beam

1) The main beam of a Electromagnetic Door Crane consists of two parallel beams, usually in a box or truss structure, which can provide high strength and rigidity.

Box-type main beam: A closed structure welded from steel plates with high bending strength and torsion resistance. Suitable for large-tonnage and large-span crane applications.

Truss main beam: A grid structure welded from steel pipes or profiles, which is light but still has sufficient strength. It is often used in situations with lighter loads and long spans to reduce the weight of the main beam.

2) The main beam generally uses high-strength low-alloy structural steel to ensure its strength and durability when lifting heavy objects. Commonly used steels include Q235B, Q345B, etc., which have good mechanical properties such as tensile strength, bending strength and wear resistance.

3) Functional characteristics of the main beam

High rigidity: The design and structure of the main beam ensure that it has sufficient rigidity to withstand the stress caused by the lifting load and trolley operation.

High strength: The double-beam design enables the crane to have a higher load-bearing capacity and can handle large-tonnage heavy lifting tasks.

Wind resistance: When used in the open air, the main beam design can withstand large wind loads and ensure the stability of the equipment.

Lifting System

Technical features of the lifting system

1) Lifting speed: The lifting speed of a Electromagnetic Door Crane can be adjusted according to actual operating requirements. Many modern cranes are equipped with variable frequency control systems, which can achieve smooth acceleration and deceleration, improving the flexibility and safety of operation.

2) Lifting height: Depending on the specific working environment, the lifting system can be designed to adapt to different lifting heights to ensure that it can meet the needs of various occasions.

3) Large load capacity: The lifting system of a Electromagnetic Door Crane usually has a high load capacity and can handle heavy objects ranging from a few tons to hundreds of tons.

4) Precise control: Modern lifting systems are generally equipped with precise control systems that can achieve micro-operation to ensure accuracy during the lifting process, especially suitable for occasions requiring high-precision operations.

The lifting system of a Electromagnetic Door Crane is the core part of the equipment and directly determines the working efficiency and safety of the equipment. Through the reasonably designed power unit, pulley block, hook and brake, the lifting system can stably and reliably complete the lifting operations of various heavy objects.

3.End carriage

1) The end beam of a Electromagnetic Door Crane is an important structural component connecting the main beam and the outrigger. It mainly plays the role of connecting the main beam and the trolley running mechanism, ensuring the overall structural stability and smooth operation of the crane.

2) The end beam is located at both ends of the Electromagnetic Door Crane, connecting the two main beams and the outriggers to form a complete gantry structure. The trolley running mechanism, including wheels, drive devices, etc., is installed on the end beam to ensure that the crane can run smoothly on the track. When the crane is working, the load carried by the main beam is transferred to the outrigger through the end beam, and then transferred to the ground track by the outrigger. Therefore, the end beam plays an important role in bearing and transmitting in the entire structure.

3) The end beam usually adopts a closed box structure welded from steel plates. This structure has good bending strength and torsion resistance, and can withstand the multi-directional stress generated by the crane during operation. Crossbeams and stiffeners are often added to the design of the end beam to enhance the stability of the end beam and prevent excessive vibration or deformation during operation. In order to maintain the overall balance and stability of the crane, the structure of the end beam is usually symmetrical, and the end beams at both ends have the same specifications and performance.

 

4.Crane travelling mechanism

Technical features of crane running mechanism

1) Large load-bearing capacity: The crane running mechanism of a Electromagnetic Door Crane has a large load-bearing capacity and can bear the weight of the crane and the load. The wheels and drive system are usually designed to withstand high-load conditions.

2) Multiple speed control methods: Modern crane running mechanisms are usually equipped with variable frequency speed regulation systems, allowing operators to adjust the operating speed as needed. The variable frequency system can provide smooth acceleration and deceleration, avoiding the impact of traditional motors when starting or stopping.

3) Smooth start and stop: Through the frequency converter or soft start device, the motor can achieve smooth start and stop, avoiding the impact of sudden start and stop on the equipment, thereby extending the life of the machinery.

4) Wind resistance: Cranes used in open-air environments, especially large gantry cranes, are usually also designed with wind resistance devices, such as track clamps, windproof locks, etc., to prevent the crane from being moved or overturned in windy weather.

 

5.Trolley travelling mechanism

1) Working principle of the trolley running mechanism

Driving process: The motor provides power through the reducer to drive the wheel group of the trolley to move along the main beam track. The moving speed of the trolley is adjusted by controlling the speed of the motor.

Lifting and lowering: The lifting mechanism controls the up and down movement of the hook through an electric hoist or a winch to achieve the lifting and lowering of the heavy object. The operator can accurately adjust the lifting height and speed through the control system.

Safety control: During the movement and lifting of the trolley, the limit switch will detect whether the trolley exceeds the operating range to ensure the safety of the equipment. At the same time, the overload protection device will automatically stop running when the hoisting weight exceeds the set limit.

2) Maintenance and maintenance of the trolley running mechanism

Regular inspection: Regularly inspect the various components of the trolley, especially the wheels, lifting mechanism and drive device, to ensure that there is no wear, cracks or other damage.

Lubrication and maintenance: Regularly lubricate the wheels and bearings of the trolley to reduce friction and improve operating efficiency.

Safety device inspection: Regularly check the sensitivity of the limit switch and overload protection device to ensure that they can work normally at critical moments.

 

6.Crane wheel

Structural features of wheels

1) Wheel material: Wheels are generally made of high-strength cast steel or forged steel, which have good wear resistance and impact resistance and can withstand long-term friction and heavy load pressure.

2) Diameter and width: The diameter and width of the wheel are determined according to the load capacity of the crane and the specifications of the track. A larger wheel diameter can reduce the friction between the wheel and the track and extend the life of the wheel.

3) Rim design: The edge of the wheel is designed as a round or raised rim to prevent the wheel from detaching from the track, and it also helps to maintain the stable operation of the crane.

4) Surface treatment: The surface of the wheel is usually quenched or other heat treatment processes to enhance its wear resistance and strength and extend its service life.

7.Crane Hook

1) Basic functions of hooks

Load-bearing function: The hook is the part of the crane that is directly connected to the heavy object. It is used to hang various materials, equipment and other heavy objects, and bear the full load when the crane is lifting.

Grabbing function: The hook-shaped design of the hook enables it to easily grab and fix the sling or objects, realizing fast loading and unloading and lifting.

Safety function: The hook is usually equipped with a safety buckle or lock to prevent the heavy objects from slipping during lifting and ensure the safety of operation.

2) Classification of hooks

The hooks of Electromagnetic Door Crane are mainly divided into the following types according to their structure and usage scenarios:

Single hook: simple structure, suitable for light or medium load lifting operations. Single hook is easy to operate and suitable for environments with small space.

Double hook: used for lifting of larger loads, usually used in situations where two points need to be lifted stably at the same time to disperse the force points.

Swivel hook: can rotate 360 degrees, easy to adjust the direction of the heavy object, suitable for multi-directional operation scenarios. Usually equipped with automatic or manual rotation device to improve the flexibility of lifting.

 

Motor

1) Functions of the motor

Driving function: The motor provides power, and through cooperation with the reducer, the operation of the crane's trolley, car and lifting mechanism is realized.

Lifting function: The motor drives the winch or electric hoist to lift or lower the hook to achieve vertical lifting of heavy objects.

Traveling function: Both the trolley and the car rely on the power provided by the motor, so that the crane can move along the track in the workplace.

Control function: Modern crane motors are usually combined with frequency conversion control systems to adjust the operating speed and achieve precise control.

The motor of a Electromagnetic Door Crane is a key component to ensure efficient and safe operation of the equipment. Its design needs to have high starting torque, good heat dissipation performance, low-speed stability and high reliability. Through precise control systems and regular maintenance, the motor can ensure the stable operation of the crane in various working environments and meet the lifting needs under different working conditions.

.

 

Sound and light alarm system & limit switch

1) Sound and light alarm system

The sound and light alarm system is an alarm device that combines sound and light signals. When the crane encounters danger or abnormal conditions during operation, the sound and light alarm will send out a warning signal to remind the operator and surrounding personnel to pay attention to safety.

Warning function: When the crane starts to operate or an abnormal situation occurs (such as overload, limit switch triggering), the sound and light alarm system will send out a sound (such as a buzzer) and a flashing light signal to remind the surrounding personnel to stay alert and avoid danger.

Safety Tips: When the crane is overloaded or the trolley or car is moving, the sound and light alarm system will issue an alarm in advance to ensure that other workers in the operating area can avoid it in time and reduce the risk of accidents.

Status indication: Through different sound and light signals, the system can indicate the current status of the equipment, such as normal operation, about to start, stop or failure.

2) Limit switch

The limit switch is a safety device installed on a Electromagnetic Door Crane to limit the movement range of the crane and the trolley and trolley to prevent them from exceeding the set range of movement and ensure the safety of operation.

Position limit: The limit switch mechanically or electrically limits the maximum travel of the trolley, car and lifting mechanism to prevent the equipment from exceeding the set safety range.

Prevent excessive operation: When the lifting or operation of the crane reaches the specified limit position, the limit switch will automatically cut off the power supply of the motor to prevent further operation and avoid damage to equipment and cargo.

Protect equipment: By limiting the travel of the trolley and car, the limit switch can prevent the crane from colliding with the end of the track or other equipment to avoid equipment damage.

10.Safety Devices

1) Overload protection device: used to detect whether the crane is overloaded. When the hoisted weight exceeds the rated load of the crane, the overload protection device will automatically cut off the power supply or alarm to prevent the crane from being damaged due to overload and avoid safety accidents.

2) Emergency stop button: The emergency stop button is used to quickly cut off the power supply of the crane in an emergency, stop all operations, and prevent accidents. The operator can immediately press the emergency stop button when an abnormality or emergency is found.

3) Windproof device: used to prevent the Electromagnetic Door Crane used outdoors from tipping over or sliding due to strong winds. The device can lock the trolley mechanically or electrically to prevent the wind from pushing the crane along the track.

4) Buffer: The buffer is installed at the end of the crane trolley and trolley to reduce the impact force when the crane runs to the end of the track to prevent collision and damage to the equipment.

5) Brake: The brake is a key safety device of the crane, used to control the stopping and positioning of the crane, especially in the lifting mechanism and the walking mechanism.

6) Anti-collision device: The anti-collision device is used to prevent the trolley and trolley of the crane from colliding when running on the track. Through sensors or limit devices, the system can automatically slow down or stop when other obstacles are detected.

7) Wire rope break protection device: used to detect the breakage or relaxation of the lifting wire rope. Once the wire rope breaks or relaxes, the protection device will immediately stop the lifting operation to prevent the heavy object from falling.

 

11.Control Mode

1) Manual control: The operator directly controls the various operating mechanisms of the crane through buttons or switches on the manual control panel. Simple operation, suitable for small or short-term operations; can be quickly adjusted according to specific needs.

2) Wireless remote control: The various functions of the crane are controlled by a wireless remote control, and the operator can operate at a safe distance. Improves the flexibility and safety of operation, especially suitable for complex or dangerous working environments.

3) Wired remote control: Operate through the control line connected to the crane, and the operator inputs instructions through a handheld controller. Compared with wireless remote control, the signal is stable and not easily interfered with, which is suitable for operation in a fixed area.

4) Automated control: Automated operation is achieved through PLC (Programmable Logic Controller) or computer system, and the operation of the crane is controlled according to the preset program. Improves the accuracy and consistency of operation, suitable for large-scale and repetitive operations, and reduces interference from human factors.

5) Frequency conversion control: The speed of the motor is adjusted by the frequency converter to achieve precise control of the operating speed of the crane. It can smoothly accelerate and decelerate, improve the safety and efficiency of lifting operations, and reduce the impact on equipment.

12.Sketch

Main technical

 

 

1) Strong carrying capacity

The double-beam structure has high rigidity and strength and can carry larger loads. Compared with single-beam gantry cranes, the double-beam design enables the crane to carry heavier materials, usually up to tens or even hundreds of tons.

2) Large span and wide coverage

Electromagnetic Door Crane can be designed with larger spans as needed to adapt to wide working sites. Its span can be adjusted according to the needs of the working environment and is suitable for large yards, docks, open-air storage and other places.

3) High structural stability

The double-beam structure design has high structural rigidity and anti-deformation ability, which can ensure the stability of the crane under high loads.

4) Large lifting height

Since a trolley can be installed above the main beam of the Electromagnetic Door Crane, the hook can achieve a higher lifting height. Compared with single-beam gantry cranes, double-beam cranes have a larger lifting height and can meet working environments with greater height requirements, such as shipbuilding plants and steel structure installations.

5) Strong versatility

Electromagnetic Door Cranes can be equipped with a variety of accessories and tools according to different operating requirements, such as electromagnetic suction cups, grabs, slings, etc., for handling different types of goods, such as bulk goods, steel plates, containers, etc.

6) Smooth operation

Electromagnetic Door Cranes are usually equipped with trolley and car operating mechanisms, which have good running stability, especially when carrying long distances and frequently lifting, reducing the swaying and collision of goods. The motor control system can perform precise speed adjustment, achieve smooth lifting, lowering and walking operations, and ensure the safety and accuracy of the lifting process.

 

 

1) Large factories and manufacturing: In heavy industry and manufacturing, Electromagnetic Door Cranes are widely used to transport and lift heavy materials and large equipment.

2) In the field of construction engineering, Electromagnetic Door Cranes are indispensable lifting equipment, especially suitable for handling heavy building materials and construction equipment. For example, in projects such as airports, ports, tunnels, etc., Electromagnetic Door Cranes can carry building materials, large equipment, steel structures, etc. to support engineering construction.

3) Ports and docks

Ports and docks require efficient material handling equipment to handle large amounts of cargo and containers, and Electromagnetic Door Cranes play an important role here. Electromagnetic Door Cranes can be equipped with grabs or container spreaders to quickly and efficiently carry heavy containers and improve the loading and unloading efficiency of ports.

4) Power industry

Most of the equipment in the power industry is large in size and heavy in weight, and requires Electromagnetic Door Cranes to carry and install. Electromagnetic Door Cranes can be used to install and maintain large power generation equipment such as steam turbines, generators, transformers, etc.

5) Mining and Metallurgical Industry

The mining and metallurgical industries have huge demands for material handling, especially the transportation of heavy ores, steel and metallurgical equipment. Electromagnetic Door Cranes are competent for such high-load work. In ore mining sites and ore processing plants, cranes are used to transport heavy ores, equipment and raw materials.

6) Special occasions: Electromagnetic Door Cranes can also be used in some special occasions, such as nuclear industry, military engineering, and heavy lifting and handling in extreme environments such as high temperature and high pressure. For example, in the construction of nuclear power plants, they are used to lift and transport large equipment such as nuclear power equipment and reactor vessels.

 

 

 

1) Demand analysis and design: Demand analysis is carried out according to the specific requirements of the customer's working environment, load capacity, span, lifting height, etc. The design of the crane includes structural design, mechanical design and electrical design. The designer draws the general drawing, component drawing and electrical schematic diagram according to the requirements to ensure that the entire system can meet the operation requirements.

2) Material procurement: The main structural parts of the crane (such as the main beam and end beam) use high-quality steel, usually high-strength materials such as Q235B or Q345B. Including core components such as motors, reducers, brakes, wire ropes, wheels, etc., purchase standardized components from qualified suppliers to ensure the reliability and safety of the equipment.

3) Parts processing and manufacturing: Structural parts such as main beams and end beams need to be cut, welded and machined. The connection holes and support surfaces of the main beams and end beams need to be machined to ensure the accuracy and consistency of the parts. Mechanical parts such as wheels, gears, bearings, wire rope drums, etc. need to be machined and assembled. The processing of wheels includes forging, turning and surface quenching to ensure its wear resistance and precision.

4) Anti-corrosion treatment and coating: Surface treatment of structural parts, such as sandblasting or shot blasting, removes rust and oxide layers on the steel surface and enhances the adhesion of the coating. The coating of anti-corrosion coatings is very important for the long-term use of gantry cranes in outdoor environments. Coating is usually divided into primer, intermediate paint and topcoat to ensure the corrosion resistance of the crane under harsh climatic conditions.

5) Component assembly: Assemble the processed main beam and end beam to ensure the strength and stability of the structural connection. The trolley running mechanism and the trolley running mechanism are installed on the main beam and end beam respectively. Assembly of components such as wheels, reducers, motors, brakes, etc. Install control cabinets, cables, limit switches, sound and light alarm devices, etc. to ensure that the electrical system can operate safely.

6) System debugging: Debug the operating status of each mechanical part, including the speed, stability and accuracy of the lifting system, trolley and trolley running mechanisms. Ensure that the wheels of the trolley and trolley run smoothly and without deviation on the track. Check the coordinated operation of the motor, reducer and brake to ensure that the crane can stop quickly and safely in an emergency. Test the control system, motor, limit switch and safety device.

7) Quality inspection: Through static load test, check whether the crane can withstand the design load and ensure the strength and stability of the crane structure. Perform dynamic test under simulated working conditions to check the performance of the crane in actual operation, including running smoothness, speed, braking effect, etc. Perform non-destructive testing on the welding parts of the crane to ensure the quality of the welds. Check the safety and stability of the electrical system to ensure that the equipment can operate normally and safely.

8) Packaging and transportation: Due to the large size of the crane, it is usually disassembled into several parts (such as main beam, end beam, wheel set, control cabinet, etc.) for transportation to facilitate loading and unloading and installation. Protect key components of the equipment to avoid damage during transportation, such as using shockproof materials to wrap electrical equipment and precision components.

 

 

 

 

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

Hot Tags: electromagnetic door crane, China electromagnetic door crane manufacturers, suppliers, factory, Steel Mill Overhead Cranes, Steel Factory Overhead Crane, Ladle Foundry Bridge Crane, Crane Parts, Double Beam Explosion Proof Overhead Crane, Double Beam Gantry Crane