Vanbon 5t European electric single beam suspension crane

Electric single-beam cranes mainly include three operating mechanisms: hoisting operating mechanism, cart operating mechanism, and trolley operating mechanism. The hoisting mechanism is mainly composed of electric hoist, steel wire rope, pulley, hook or spreader. The metal structure of the electric single-beam bridge crane is mainly composed of two parts: the main beam and the end beam. The main beam structure is mostly a combined cross section of I-beam and steel plate. It is composed of cover, web and I-beam. Stiffener plate. Its safety and reliability directly affect the operating quality and working ability of the crane.

Steel structure production characteristics

1) The main steel structure (main beam, end beam) materials are all Q235-B, and the materials used have material reports and corresponding certificates of conformity.

2) The manufacture, welding and inspection of steel structure shall be carried out in accordance with national standards. Important force-bearing butt welds adopt double-sided groove welding process, and conduct visual inspection and non-destructive inspection according to regulations. All welders hold corresponding grade certificates.

3) The main girder of all cranes adopts the whole plate without butt joint process, and the butt welding seam of the main girder steel plate is eliminated. The 3.2t single girder crane eliminates the hidden danger of steel plate butt welding. (Steel plate butt welding is the most important welding and the part with the most hidden quality problems)

4) All plates are automatically cut by a CNC cutting machine, and the arch of the main beam is preset to avoid the problem of downward deflection of the traditional fire-baked main beam.

5) The steel surface is shot blasted, and its surface roughness reaches the Sa2.5 level in GB8923 "Steel surface treatment registration and rust removal grade before painting", which improves the paint adhesion and does not peel off the paint to ensure the integrity of the single beam crane. Long-term beautiful machine

6) The longitudinal waist welding seam of the main beam adopts domestic advanced automatic special machine ambush welding, which is beautiful in shape and guarantees the welding quality.

7) The crossbeam of the cart is made of rectangular tube as a whole, without splicing, no welding seam, beautiful appearance, sturdy and durable.

8) All wheels are installed by boring type to avoid wheel treads not on the same horizontal plane and improve wheel running accuracy.

Performance characteristics of mechanical system

1) The lifting mechanism of the single-beam crane is composed of a Sino-foreign joint venture brand Kaicheng two-speed electric hoist. This product has the advantages of compact structure, light weight, small volume, and convenient operation.

a. Reducer: The electric hoist reducer of the single-beam crane adopts a helical gear three-stage reduction. The gears and gear shafts are forged and processed by 40Cr or 20CrMnTi steel. After heat treatment, they are all supported by rolling bearings. The box shell is made of cast iron and assembled. Tight, dustproof and reliable.

b. Reel device: The reel is made of cast iron or seamless steel pipe, and is connected with the reducer by splines, and the other end is supported by a rolling bearing at the front end of the cone motor. The drum shell is made of steel plate.

c. Hook device: The hook is made of 20 steel die forging, and the thrust ball bearing is connected with the shell through the hook beam, so that the hook can run freely.

d. Coupling: The torque of the motor is transmitted to the reducer through the claw-type elastic coupling, which can absorb the impact of the load and obtain a smooth start.

e. Slow-speed drive device: The slow-speed drive device consists of a drive box, a box cover, and a small motor. The small motor drives the main motor to work through the slow device.

f. Limiter: In order to prevent malfunctions caused by the lifting and lowering of the hook beyond the limit position, a limiter is installed on the hoist. When the hook reaches the limit position, the limiter is driven by the rope guide on the drum device of the single beam crane Action to automatically cut off the power supply to stop the hoist.

g. Motor: The lifting motor adopts a cone-shaped brake motor with a larger starting torque to adapt to frequent direct starting during intermittent operation of the product. The maximum torque is 2.4 to 3 times the rated torque.

h. To ensure safe and reliable use, all electric hoists are equipped with lifting weight limiters.

i. Electric control system: It is mainly composed of the control box and operation button box of the single beam crane, with protection or warning functions such as loss of pressure, interlocking, overload, overload alarm and so on.

2) Trolley operating mechanism

The operating mechanism of the electric hoist of a single beam crane is an electric trolley type. The reduction gear is 40Cr forged, quenched and tempered, and installed in a closed reduction box, all supported by rolling bearings, and the wallboard is made of steel plate to ensure flexible operation, convenient use and long life.

The trolley running mechanism is equipped with a frequency converter, stepless speed regulation, stable operation, accurate positioning and comfortable operation.

3) Cart operating agency www.qzj99.com

The trolley running structure of the single-beam crane consists of a motor, a reducer, and a wheel set. The wheels are 45# forgings. The hardness after heat treatment is HB≥330～390 on the tread and HB≥260 at the depth of 20mm. The material of shaft and gear is 45# or 40Cr after quenching and tempering. The cart drive is a new type LDA drive device, which has the advantages of simple structure, small size, large starting torque, frequent starting, stable running speed, low noise, safe and reliable use, convenient installation and maintenance, and beautiful appearance.

The trolley running mechanism of the single-beam crane is equipped with a frequency converter, stepless speed regulation, stable operation, accurate positioning and comfortable operation.

1. End beam:

    It adopts European-style end beam structure, strict requirements and high quality. The wheel set is a series of mature products, adopting central shaft spline transmission, compact structure, convenient installation and maintenance.

    It adopts three-in-one drive mechanism, F-class insulated frequency conversion motor, and the continuous power connection rate reaches 40% ED. The quality is reliable, the style is novel and small and beautiful. Small size, light weight, low noise, high efficiency, easy installation, stable walking, sensitive, safe and reliable braking (automatic braking in about 1 second when stopping or power failure), and variable frequency speed regulation. It represents the trend of world technology development in this century. .

2. Main beam:

    Welded box shape, camber conforms to national standards.

    The web is cut by CNC cutting to ensure the smooth forming and precision of the camber curve.

    The main weld adopts automatic submerged arc welding and non-destructive testing.

    After welding, the whole beam is shot blasted to reach Sa2.5 level to eliminate welding stress.

    Epoxy zinc-rich paint, two bottoms and two sides, 140μ thick, long life, beautiful appearance and good gloss.

3. Gourd:

    The leading technical design guarantees the optimized limit size of the product. It has a compact structure while ensuring high performance and efficiency. In the same workshop and working area, the application of KF wire rope electric hoist can cover a larger area and reduce blind spots. If the KF product series parameters are used for design in the plant design stage, the requirements for plant height can be greatly reduced, and customers can save investment, increase efficiency and reduce costs.

    The high-quality hoisting drive ensures safe, stable and efficient operation. The compact structure design ensures the smallest deviation of the hook. The hoisting provides two-speed (frequency conversion optional). The trolley is equipped with frequency conversion standard configuration to ensure lifting The efficient operation of equipment and the improvement of workshop logistics efficiency ensure that the customer's various work plans are implemented as scheduled.

    The proprietary technology of Kekang Hoisting has a variety of protection functions. The device ensures the safe and reliable operation of the crane. Its operation monitoring unit can make detailed records of the operation of the electric hoist, the operation status of the motor and the calculation of the safe working cycle, and provide warn. All records can provide data for maintenance, understand the root cause of the problem, and make the maintenance plan of the crane more timely and reasonable.

4. Electrical:

    Configure the lack of phase protection function.

    It adopts a special anti-vibration contactor for cranes.

    The electric control box is anti-corrosion, and the protection level reaches IP55.

    The control box has a reasonable layout and is convenient for maintenance.

    The trolley mobiles power supply system consists of flat cables, galvanized slide rails and cable trolleys, which slide smoothly.