Explain the advantages of single beam crane

Electric single beam crane mainly consists of three operating mechanisms: lifting operation mechanism, large vehicle running mechanism and trolley running mechanism.

The hoisting operation mechanism consists of electric hoist, wire rope, pulley, hook or sling.

Electric single-beam bridge crane metal structure is mainly composed of two parts of the main girder and end beam, its main girder structure for beams and steel plate combination section, made up of cover plate, web and flange beam, the casing and vertical and horizontal length of reinforced plate.

Its safety and reliability directly affect the crane operation quality and working ability.

Characteristics of steel structure production.

1) the material of main steel structure (main beam and end beam) is made of Q235-B, and the materials used are material report and corresponding certificate of qualification.

2) manufacture, welding and inspection of steel structure shall be carried out according to national standards.

The welding process of double-sided groove welding is adopted for the important force butt welding, and the appearance inspection and non-destructive inspection are carried out according to the regulations. All welders hold the corresponding grade certificate.

3) the main beam of crane adopts the whole slab without butt welding process, canceling the butt weld of the main girder steel plate and eliminating the hidden danger of steel plate butt welding.

(steel plate butt welding is the most important welding, the most dangerous part of quality)

4) all the plates are automatically made by CNC cutting machine, and the arch degree of the main beam is preset, so as to avoid the problem of bending under the traditional fire main beam.

5) steel shot blasting treatment, the surface roughness to GB8923 "steel surface treatment before painting registers and descaling grade of Sa2.5 level, improve paint adhesion, not to take off the lacquer, ensure single-girder crane machine long and beautiful

6) the girder longitudinal waist seam adopts the domestic advanced automatic special machine to wait for welding, forming beautiful, ensuring the welding quality.

7) the beam of the cart is made of rectangular tube, no stitching, no weld, beautiful appearance and durable.

8) all wheel installation adopts boring installation to avoid the wheel tread on the same horizontal plane and improve the running accuracy of wheels.

Mechanical system performance characteristics.

1) single beam crane hoisting mechanism consists of a sino-foreign joint venture brand, kaicheng two-speed electric hoist, which has the advantages of compact structure, light weight, small volume and convenient operation.

A. reducer: single-beam crane electric hoist reducer adopt bevel gears level 3, gear and gear shaft adopts 40 cr or 20 crmnti steel forging processing, and the heat treatment, all with a rolling bearing, box shell made of cast iron, assembly, dustproof and reliable.

B. Drum device: the reel is made of cast iron or seamless steel tube, and the spline is connected with the reducer, and the other end is supported by a rolling bearing at the front of the tapered motor.

The shell is made of steel plate.

C. Hook device: the hook is made of 20 steel die forging and is connected to the shell by the thrust ball bearing, which makes the hook operate freely.

D. Coupling: the torque of the motor, passed through the claw type elastic coupling to the reducer, the coupling can absorb the load shock to achieve a smooth start.

E. Slow driving device: the slow driving device consists of a driving box, a box cover and a small motor. The small motor drives the main motor through a slow device.

F. limiter: in order to prevent failure due to hook up and down more than limit position, gourd with limited position, when the hook to its limit position, because the single-beam crane reel device rope guide to drive the limiter action, so as to automatically cut off the power to make the gourd stop.

G. Motor: a conical brake motor with a larger starting torque is adopted to adapt to the frequent direct starting in the intermittent work of the product, and the maximum torque is 2.4~3 times of the rated torque.

H. To ensure the safety and reliability of the use, all electric hoist are equipped with a weight limiter.

I. electronic control system: mainly composed of the control box and operation button box of the single-beam crane, which has the protection or warning function of loss pressure, interlock, overload, overload alarm, etc.

2) trolley operation mechanism.

The operating mechanism of single beam crane electric hoist is electric trolley type.

Reduction gear of 40 cr forging, and the conditioning treatment, installed in a closed reduction box, all adopt the rolling bearing, wall plate made of steel plate, guarantees flexible operation, easy to use, long service life.

The car operating mechanism is equipped with inverter, stepless speed regulation, stable operation, accurate positioning and comfortable operation.

3) large vehicle operation mechanism.

The operation structure of single girder crane is composed of motor, reducer and wheel group, and the wheel is 45# forging. The hardness after heat treatment is greater than 330 ~ 390, and the depth of 20mm HB is greater than 260.

The material of shaft and gear is 45# or 40Cr after adjustment.

Cart driver for new type LDA drive device, the device has simple structure, small volume, large starting torque, but frequent starting, speed smooth, low noise, safe and reliable to use, easy installation and maintenance, beautiful and easy, etc.

The single-beam crane operation mechanism is equipped with inverter, stepless speed regulation, stable operation, accurate positioning and comfortable operation.