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The Working Characteristics Of Heavy Cranes




Large cranes are widely used in all kinds of equipment, such as lifting, transportation, handling, installation and personnel transportation, Big Crane Claw Machine which are indispensable for modern industrial production.

Large cranes are intermittent, repetitive working methods that lift, descend, or lift and transport material by means of lifting hooks or other spreaders.

The main parameters of a large crane

Rated lifting capacity Gn, span S, amplitude L, lifting height H, running speed V, lifting moment M, gauge k, base distance B, Big Crane Claw Machine wheel pressure p, working level and so on.

The construction of the crane

(1), steel structure: the main beam, the end beam (beam), small frame, the legs, the next beam, boom, balance arm, column, mast, rod, tower, walk Taiwan and the driver room.

(2), transmission: hoisting mechanism, operating mechanism, rotary mechanism, luffing mechanism and jacking mechanism.

(3), electrical system: handheld controller, master controller, conductive device, cable reel, resistance box, inverter and control cabinet and so on.

(4), the main components: Jun Jun, grab, lifting electromagnets, wire rope, chain, pulley, reel, brakes, wheels and rails.

Large crane safety device

Lifting height limiter, operating limit limiter, buffer, anchoring straight, Big Crane Claw Machine clip rail or windscreen shoes, safety Jun, anti-dumping device, from the weight limiter, torque limiter and anti-collision device.

The working characteristics of heavy cranes

1) large cranes are usually large structure, complex institutions, to complete the lifting movement, horizontal movement. For example, the bridge crane can complete the lifting, the cart is running and the car runs three sports; the door crane can complete the hoisting, the lap, the rotation and the cart to run four movements. Big Crane Claw Machine In the course of the operation, often several different directions of movement at the same time operation, technical difficulty is greater.

2) heavy cranes lifting a variety of heavy objects, the load is changing. Big Crane Claw Machine Some heavy objects weighing hundreds of tons or even thousands of tons, and some objects up to tens of meters, the shape is also very irregular, there are scattered, hot melt state, flammable and explosive dangerous goods, Big Crane Claw Machine lifting process complex Danger.

3) Most large cranes need to be operated in a large space, and some are equipped with rails and wheels (such as tower cranes, bridge cranes, etc.); some are loaded with tires or crawlers on the ground (such as car cranes , Crawler, etc.); some need to walk on the wire rope (such as passenger, cargo aerial ropeway), the larger space, Big Crane Claw Machine once the impact of the scope of the accident is also larger.

4) Some large cranes need direct carrier personnel to do movements on rails, platforms or wire ropes (such as elevators, lifting platforms, etc.), and its reliability directly affects personal safety.

5) large cranes exposed, the activities of more parts, and often with the lifting operations personnel in direct contact (such as hooks, wire rope, etc.), potentially many occasional risk factors.

6) complex operating environment. From large steel joint enterprises, to modern ports, construction sites, railway hubs, tourist attractions, there are large cranes in operation; workplace often encounter high temperature, high pressure, flammable and explosive, transmission lines, Big Crane Claw Machine strong magnetic and other risk factors, Poses a threat to equipment and operators.

7) large crane operations often need more people with, together. An operation, requiring command, strapping, driving and other operating personnel with skilled, action coordination, mutual care. Operators should have the ability to handle on-site emergencies. There is a great deal of difficulty in the close cooperation between multiple operators.

The above characteristics of the crane work, Big Crane Claw Machine decided that it has a great relationship with the safety of production. If the crane on the design, manufacture, installation and maintenance and other aspects of a slight negligence, it may cause casualties or equipment accidents. On the one hand caused the casualties, on the other hand will cause great economic losses.