Crane Single Girder

 

 

1) Crane Single Girder is a common industrial lifting equipment, widely used in workshops, warehouses, production lines and other occasions, for handling and lifting various heavy objects. Compared with double-beam bridge cranes, Crane Single Girders have a simpler structure, with advantages such as economy and efficiency, and are suitable for small and medium-sized enterprises and light industrial uses.

2) The structural design of Crane Single Girders is relatively simple, mainly consisting of bridge frame, operating mechanism, lifting mechanism and electrical control system, which is easy to install and maintain. Since Crane Single Girders only need one main beam, they occupy less vertical space, can maximize the height of the workplace, and are suitable for narrow factories and low spaces. Compared with double-beam cranes, Crane Single Girders consume less materials and have lower production costs. At the same time, they also have advantages in power consumption and maintenance costs, and are economical and practical.

3) Crane Single Girders are usually equipped with simple and easy-to-use operating systems, support ground operation, remote control operation, etc., which reduces the difficulty of operation for workers. It can be installed on the ceiling or steel frame structure in the factory, has a large coverage range, and is suitable for large spans and multi-station usage scenarios. It can be combined with an electric hoist to flexibly realize horizontal and vertical material handling.

4) Crane Single Girder has the advantages of simple structure, economical and practical, flexible and efficient, and is widely used in material handling tasks in small and medium-sized enterprises and light industries. It plays an indispensable role in modern industrial production, helping to improve production efficiency and reduce labor intensity. It is an ideal handling equipment for factories and warehouses.

Warranty：1 Year

Weight (KG)：8500 kg

Feature：Bridge Crane

Condition：New

Span：3~35

Lifting mechanism：Eliectric Hoist

Control method：Remote Control

Color：Clients' Requirments

Main electrical parts：Schneider

Power Source：3 Phase 380V 50hz/Custmized

Work Duty：A3~A5

 

 

1.Main beam

1) The main beam of a Crane Single Girder is usually designed in a box or I-beam type to form an integral structure with good load-bearing capacity and rigidity. The span of the main beam can be customized according to specific application requirements, usually ranging from 7.5 meters to 31.5 meters to ensure that the entire working area can be covered. Due to the use of reasonable design and materials, the main beam has a relatively light weight, which helps to improve the overall crane operation efficiency.

2) The main beam usually uses high-strength structural steel (such as Q235B, Q345B, etc.) to ensure its strength and stability when bearing heavy loads. The surface of the main beam is generally sandblasted and rust-proof and painted with anti-corrosion to improve its durability and adapt to various working environments.

3) The maximum lifting weight and working conditions of the crane need to be considered when designing the main beam to ensure that the main beam will not be plastically deformed or damaged under load. It should have good bending and shear resistance to cope with loads and dynamic loads in different directions. The design of the main beam needs to ensure the stability of the overall structure to prevent tilting or collapse during operation.

 

Lifting System

1) Electric hoist: The core component of the lifting system, responsible for lifting or lowering the load. The electric hoist is usually installed in the middle or one side of the main beam, and has components such as a motor, a reducer, and a drum.

Drum: The drum inside the electric hoist is used to wind and release the wire rope to control the up and down movement of the load.

2) Wire rope: The high-strength wire rope is connected between the hook and the drum, carrying the load and providing support during the lifting and lowering process.

3) Hook: The hook is a component directly connected to the load and is used to carry materials. The design must ensure its load-bearing capacity and safety.

4) Braking system: Used to quickly brake in the event of a power outage or emergency in the electric hoist to ensure the safety of the load.

5) Control device: Usually includes a manual controller, remote control or PLC control system for operating lifting and lowering.

 

3.End carriage

1) The end beam is an important part of the Crane Single Girder. It is located at both ends of the crane and connects the main beam and the outrigger. It not only bears the structural stability of the crane, but also plays a key role in its operating performance and safety.

2) The end beam is usually designed with a box-type or I-shaped structure to improve strength and rigidity while reducing deadweight. The end beam is connected to the main beam and the outrigger by welding or bolts to ensure the stability of the overall structure. The specific working conditions of the crane should be considered during the design to adapt to different spans and load requirements.

3) The end beam generally uses high-strength steel to ensure its strength and stability under load. The surface is usually sandblasted, rust-removed and anti-corrosion painted to improve durability and adapt to various working environments.

4) The end beam carries the weight of both ends of the main beam and the operating mechanism to ensure that the crane remains stable during operation. Connect the main beam and the outrigger to form a complete frame structure to ensure the stability of the crane. The end beam is usually equipped with guide wheels or tracks to guide the trolley to move smoothly along the main beam.

 

 

4.Crane travelling mechanism

1) Structural features

Track system: The crane running mechanism is usually installed on the track in the factory, which can be fixed or mobile. The design of the track must ensure that it can withstand the weight of the crane and the dynamic load during operation.

Wheels: The crane running mechanism is equipped with multiple wheels, usually made of steel or alloy materials to improve the load-bearing capacity and wear resistance. The diameter and width of the wheel must be designed to match the track to ensure smooth operation.

Support structure: The support structure of the crane is usually welded from steel to ensure overall strength and stability.

2) The working principle of the crane running mechanism is as follows:

Motor drive: The motor drives the reducer to generate power and drive the crane to move along the track.

Wheel axle rotation: The motor is connected to the wheel through the coupling to generate rotation, and the wheel rolls on the track to achieve lateral movement of the trolley.

Control system: The operator controls the start and stop and running direction of the motor through a control device (such as a manual button or remote control) to achieve precise material handling.

5.Trolley travelling mechanism

1) The working principle of the trolley running mechanism is as follows:

Motor drive: After the motor is started, the power is transmitted to the wheels through the reducer to drive the trolley to move on the main beam.

Chain or gear drive: Some designs use a chain or gear drive system to convert the rotational force of the motor into linear movement of the trolley.

Control system: The operator controls the direction and speed of the trolley through a control device (such as a manual button or remote control) to achieve precise material handling.

2) Maintenance and inspection

Regular lubrication: Regularly lubricate moving parts such as motors, reducers and wheels to ensure smooth operation and reduce wear.

Wear inspection: Regularly check the wear of the wheels to ensure that they are in good contact with the main beam. If severe wear is found, they need to be replaced in time.

Electrical inspection: Regularly check the motor, control system and electrical connections to ensure the normal operation of the electrical system.

Braking system inspection: Regularly check the performance of the brake to ensure that it can stop the trolley quickly and reliably when needed.

6.Crane wheel

1) Function

Load-bearing function: The wheels support the trolley and the load above it, transferring gravity to the track to ensure the stability of the crane.

Movement function: Good contact between the wheels and the track enables smooth lateral movement, allowing the crane to operate flexibly in the working area.

Guidance function: The design of the wheels allows the crane to stay on the track during operation to avoid safety hazards caused by deviation from the track.

2) Design requirements

Load capacity: The wheels must be designed to withstand the maximum load of the crane and take into account the effects of dynamic loads and impact forces.

Wear resistance: The material and surface treatment of the wheels must have good wear resistance to extend service life and reduce replacement frequency.

Stability: The design of the wheels should ensure that the crane can still maintain stable operation under high loads and uneven tracks.

7.Crane Hook

1) The hook is generally made of high-strength alloy steel (such as 45# steel or carbon steel) to ensure that it is not easily deformed or damaged when carrying high loads. The strength and toughness of the hook are improved through heat treatment process, and its impact resistance and fatigue strength are enhanced.

2) The main function of the hook is to carry and lift materials, and it needs to be designed to safely withstand the rated lifting weight. It is used to connect the lifting materials and work with the wire rope or chain to achieve the lifting and movement of the materials. Through the design of a reasonable safety lock, ensure that the materials will not accidentally fall off during the lifting and moving process.

3) The wear and deformation of the hook needs to be checked regularly to ensure that there are no cracks, rust or other damage. If any problems are found, they need to be replaced in time. Check whether the safety lock functions normally to ensure that it can effectively prevent the material from falling off during use. Keep the hook clean and remove attachments regularly to avoid affecting its carrying capacity and safety.

Motor

1) Types

Asynchronous motor: The most common choice, with the advantages of simple structure, easy maintenance and low cost, suitable for most crane applications.

DC motor: Used in situations where a wide speed regulation range is required, providing good control performance, suitable for cranes with certain specific needs.

Servo motor: Used in high-precision control applications, capable of providing precise position and speed control, but at a higher cost.

2) The motor provides power for the crane's hoisting system and trolley running mechanism to achieve material lifting and horizontal movement. By controlling the start, stop and speed of the motor, the operator can flexibly control the crane's operation process. Modern motors are usually equipped with a variety of protection devices, such as overload protection, overheating protection and short-circuit protection, to ensure the safe operation of the motor.

Sound and light alarm system & limit switch

1) Sound and light alarm system

Warning function: When the crane is working, the sound and light alarm system can timely warn the operator and surrounding staff to avoid accidents.

Abnormal state prompt: When the crane is abnormal or fails, the system will send out sound and light signals to remind the operator to check and deal with it.

Automatic monitoring: The system monitors the operating status of the crane in real time through sensors, and immediately triggers the sound and light alarm once an abnormality is found.

Manual trigger: When the operator needs to make an emergency stop or warning, the alarm system can be manually triggered.

2) Limit switch

Prevent overtravel: The limit switch is used to limit the movement range of the crane to prevent it from exceeding the set operating limit and ensure safety.

Protect equipment: By detecting the movement position of the crane, the power supply or brake is cut off in time to prevent equipment damage and safety accidents.

Position detection: The limit switch monitors the movement position of the crane in real time through mechanical contacts or photoelectric sensors.

Signal feedback: When the crane reaches the set limit position, the limit switch will send a signal to automatically cut off the power supply or trigger the brake.

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10.Safety Devices

1) Overload limiter: When the load of the crane exceeds the rated load, the overload limiter will sound an alarm or automatically cut off the operating power supply to prevent overload from causing equipment damage or safety accidents.

2) Buffer: Installed at the walking end of the crane, it is used to prevent the crane from colliding with the end of the track during operation, and plays a role in absorbing impact and protecting equipment.

3) Emergency stop button: In an emergency, the operator can press the emergency stop button to immediately stop all actions of the crane to prevent further danger.

4) Windproof device: Used to prevent the impact of wind on the crane in the open air or windy environment. Common ones include track clamps, windproof ropes, etc.

5) Anti-fall device: When the hook or sling accidentally falls off for some reason, this device can prevent the heavy object from falling suddenly and avoid accidents.

6) Rope breaking protection device: Used to ensure that the hanging object will not fall freely when the wire rope breaks or other unexpected situations occur, effectively reducing the risk of accidents.

7) Electrical protection device: including short-circuit protection, overcurrent protection, undervoltage protection, etc., to ensure that the crane's electrical system can automatically cut off power under abnormal circumstances to prevent accidents caused by electrical failures.

11.Control Mode

1) Ground handle control (hanging line control): simple operation, economical and affordable, suitable for small cranes or occasions with small operating range and low frequency.

2) Remote control control: The operator remotely controls the operation of the crane on the ground through a wireless remote control. The remote control is equipped with buttons or joysticks to realize various actions of the crane. The operation is flexible, and the operator does not have to follow the movement of the crane. It can be remotely controlled in a safe area, which is particularly suitable for dangerous environments or high-frequency operations.

3) Driver's cab control: A special driver's cab is installed on the crane. The operator sits in the driver's cab and controls the movement of the crane through the operating table. The driver's cab is generally set at a high place of the crane, and the operator can observe the entire operation site through the window. The field of vision is wide, suitable for large operation sites or occasions that require long-term and frequent operations, and the operation is comfortable.

4) PLC automatic control: Use a programmable logic controller (PLC) automatic control system. The operation of the crane is automatically executed according to the predetermined program, reducing human intervention and improving operation efficiency and accuracy. It can achieve high-precision control and multi-task automated operation, which is suitable for production lines, warehouses and other occasions that require automated operations.

5) Hybrid control method: In actual applications, multiple control methods may be combined according to different work requirements. For example, ground handle control and remote control are both available, making the operation more flexible.

 

12.Sketch

Main technical

 

 

1) Simple structure and low cost: The structure of a Crane Single Girder is relatively simple, consisting of only one main beam, a walking mechanism, a lifting mechanism, etc., so the manufacturing cost is low and maintenance is relatively convenient.

2) Light weight: The Crane Single Girder has a light weight and is suitable for installation in buildings or factories with low load-bearing requirements, which can effectively reduce the requirements for the building structure.

3) Easy installation and small space occupation: The single-beam design occupies less space and can be flexibly applied in smaller work sites. It is suitable for occasions with limited space such as small and medium-sized factories and workshops. In addition, the installation process is relatively simple and does not require complex equipment and processes.

4) Stable operation: Due to its light structure, the Crane Single Girder is relatively stable during operation, and can achieve stable lifting and movement, which is especially suitable for work occasions that require precise operation.

5) Low maintenance cost: Due to its relatively simple structure, convenient maintenance, easy replacement of parts, and low cost of daily operation and maintenance, it reduces the downtime of equipment and improves production efficiency.

6) Wide range of applications: Crane Single Girders can adapt to different load requirements and are widely used in various fields such as machinery manufacturing, assembly, warehousing, logistics, etc. They can also be equipped with different lifting devices according to actual needs, such as electromagnetic suction cups, grabs, etc., to meet diverse material handling needs.

 

 

1) Machinery manufacturing industry: In machinery manufacturing and assembly workshops, Crane Single Girders are used to transport workpieces, mechanical parts, etc., which can help improve production efficiency and are particularly suitable for work that requires frequent handling in processes such as assembly, processing, and repair.

2) Warehousing and logistics industry: In warehouses, logistics centers and other occasions, Crane Single Girders are used for loading, unloading, handling and stacking of goods. It can operate efficiently in a limited space, optimize the utilization rate of storage space, and is suitable for frequent in and out of the warehouse.

3) Automobile manufacturing industry: In the automobile manufacturing industry, Crane Single Girders are often used for the handling of car bodies, parts and components, and material transportation in assembly lines. It can help achieve rapid docking of assembly lines and improve the automation and operating efficiency of production lines.

4) Chemical industry: In chemical plants, Crane Single Girders are used to transport chemical raw materials, semi-finished products or finished equipment. Due to its flexible operation, it can meet a variety of material handling needs and effectively improve the automation level of chemical production lines.

5) Food and beverage industry: In food processing and beverage production plants, Crane Single Girders are used to transport packaging equipment, food raw materials or finished products. It occupies a small space and is flexible to operate, making it particularly suitable for environments that require high efficiency and high hygiene standards.

6) Ships and ports: In small shipyards or docks, Crane Single Girders are used to transport ship parts, maintenance equipment, and port cargo loading and unloading. It can perform precise operations in a small space to meet the special needs of ports and shipyards.

 

 

1) Design and planning: According to the specific requirements of customers, including lifting capacity, span, lifting height and application scenarios, demand analysis is carried out. Engineers design the structure of the crane according to the requirements and determine the design parameters of the main beam, trolley, car, lifting mechanism, etc. Draw detailed mechanical structure drawings, electrical control drawings and component processing drawings to ensure that the design meets industry standards and safety specifications.

2) Material preparation: According to the design plan, select suitable materials. The main materials include steel for the main beam and sub-beam, walking rails, pulleys, motors, etc. High-strength and corrosion-resistant steel is generally selected to ensure the strength and durability of the crane. Quality inspection of raw materials is carried out to ensure that steel, electrical equipment and other accessories meet the requirements to avoid quality problems during the production process.

3) Steel structure processing: According to the requirements of the drawings, the steel is cut into the required size, and the main beam and sub-beam are formed, including cutting, bending, drilling and other processes. The cut steel is welded, and the welded parts include the main beam, sub-beam, end beam, etc. Welding needs to meet high quality standards to ensure the stability and bearing capacity of the structure.

4) Mechanical parts processing: Process the core mechanical parts of the crane, including pulleys, bearings, reducers, etc. The accuracy and quality of these parts are crucial to the performance of the crane. All steel structures are sandblasted or rust-removed, and then anti-corrosion painted, usually with anti-rust paint or other weather-resistant coatings, to ensure the durability of the crane in long-term use.

5) Electrical system installation: Select electrical equipment such as motors, inverters, and control cabinets that meet the design requirements. The motor is used to drive the lifting mechanism and the travel mechanism, and the control system is used to realize the automatic control of the crane. Wiring is carried out according to the electrical drawings, and the cables and lines are installed in place to ensure the safety and functionality of the electrical system.

6) Assembly: The processed main beams, auxiliary beams and other structural parts are assembled on site to ensure that the overall size and structural accuracy of the crane meet the design requirements. Install the lifting mechanism, travel mechanism and hoisting equipment.

7) Debugging and testing: Test the various motion mechanisms of the crane (such as trolley travel, car travel, and lifting) to ensure that they move smoothly, with low noise and no jamming. Test the response speed, sensitivity and reliability of the electrical control system to ensure the normal operation of the various functions of the crane. Debug and test safety devices such as limit switches, overload protection, and emergency stop buttons to ensure that they can work effectively in emergency situations.

8) Quality inspection: Perform no-load and load tests to ensure that the crane can operate safely and smoothly under different load conditions. Overload tests are usually performed to ensure that it can withstand a certain rated load. Check the appearance of the crane, including coating, welding quality, component connection, etc., to ensure that it meets the design and process requirements.

9) Packaging and transportation: For cranes that need to be transported to the installation site, large components such as the main beam, end beam, and lifting mechanism are usually properly disassembled, and each component is protectively packaged to prevent damage during transportation. The packaged crane components are delivered to the installation site specified by the customer.

10) On-site installation and commissioning: After the crane arrives at the site, the final installation is carried out, including track laying, connection between the main beam and the auxiliary beam, and installation of the lifting mechanism. After the installation is completed, secondary commissioning is carried out to ensure that the performance of the crane is stable in the actual environment, and finally it passes the acceptance and is delivered to the customer for use.

 

 

 

 

 

 

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.

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