Electric Hoist Gantry Crane

The main components of electric hoist gantry crane include:

• Portal frame: composed of main beam, supporting legs, lower crossbeam, etc., it is the main supporting structure of the crane.
• Lifting mechanism: An electric hoist is used as the lifting mechanism, which runs along the lower flange of the main beam I-beam during operation and is used for vertical lifting and lowering of objects.
• Operating mechanism: including trolley operating mechanism and crane operating mechanism, used for lateral movement with load and longitudinal movement of lifting trolley and objects.
• Electrical control part: including driving electrical and electrical control equipment, used to control the operation and operation of the crane.
• The above components together constitute a single beam electric hoist gantry crane, enabling it to perform loading, unloading, and handling operations on rectangular fields and their airspace. When selecting and using, it is necessary to consider factors such as the usage environment, lifting capacity, span, and lifting height, and carry out reasonable maintenance and upkeep to ensure its safe and reliable service life

The application scenarios of electric hoist gantry cranes mainly include:

• Outdoor freight yards and material yards: Single beam gantry cranes are mainly used for loading and unloading operations of goods and bulk cargo in outdoor freight yards, material yards, and docks, and are suitable for steel markets, shipyards, and docks.
• Industrial manufacturing and maintenance: Electric hoist single beam cranes are widely used in factories, such as lifting work pieces in workshops, assembling and repairing equipment, etc.
• Construction site: Electric hoist single beam crane can be used for lifting operations on construction sites to improve construction efficiency.
• Port logistics: Electric hoist gantry cranes can be used for loading and unloading operations in ports to achieve rapid transportation of goods.
• Mining: Electric hoist single beam cranes play an important role in mining, used to lift ore and equipment.

In summary, electric hoist gantry cranes are widely used in multiple fields due to their flexibility, efficiency, and safety. With the advancement of technology, its performance will be further improved, providing support for lifting operations in more industries.

The technical characteristics of electric hoist gantry crane include:

• Reasonable structure, beautiful appearance: high site utilization rate, wide operating range, wide applicability, time-saving and labor-saving when in use, low noise.
• Excellent performance, large lifting capacity: light weight, low wheel pressure, simple structure, and smooth lifting.
• Easy to operate, saving space: The operation is simple and convenient, and can be operated by a handle or remote control. The height above the track surface is small, occupying less space.
• Easy installation: The bottom crossbeam and bracket are connected by high-strength bolts, the main beam is fitted into the support legs, and the electric hoist is hung on the main beam I-beam, making installation and disassembly convenient.
• Control system: It can achieve micro speed and dual speed frequency conversion functions, making operation, lifting, and electrical particularly stable.
• Safety protection function: equipped with overload alarm, inclined pulling and lifting, secondary protection against hook impact, over-current protection for missing items, etc. The control panel (handle) adopts 36V safety voltage to achieve multifunctional protection of the hoist gantry crane.
• Strong applicability: widely used in the steel market, shipyards, docks, machinery manufacturing workshops, metallurgical mining, petroleum, port terminals, railways, decoration, paper making, building materials and other industries.
• Technical parameters: Wide range of lifting capacity, span, lifting height, working environment temperature, working level, large vehicle wheel diameter, working power supply and other parameters can be customized according to needs.

In summary, single beam gantry cranes have the characteristics of reasonable structure, excellent performance, simple operation, convenient installation, complete safety protection functions, and strong applicability. They are important equipment for realizing the mechanization and automation of production processes in the engineering industry

Mechanical protection:

• Motor: The large vehicle operating mechanism adopts the ZDY series brake type motor, which has a built-in brake and reliable braking.
• Reducer: Adopting LDA or LDH type "three in one" reducer+open gear transmission type, the reducer has a small width and no coupling;
• Wheels: LDA type wheels with double wheel edges are used, making it less likely for wheels to climb over the track or fall off the track; The end baffle of the ground beam is connected by bolts, which are detachable and easy to install and maintain;
• Track scanner: Equipped with a track scanner, it can remove obstacles on the track to ensure safe operation.
• Rail clamp: When installed outdoors, a rail clamp is installed to effectively prevent large vehicles from sliding due to external forces.

Electrical protection:

• Short circuit protection: The main power circuit is equipped with an automatic air switch as a short circuit protection for the crane; The control circuit is equipped with a small capacity automatic air switch as short-circuit protection.
• Voltage loss protection: The circuit structure has a voltage loss protection function, and when power is restored after a power outage, the crane must press the start button again to resume operation, eliminating the possibility of self operation of the crane when powered on.
• Emergency power-off switch: The crane is equipped with a red mushroom shaped rotating reset emergency power-off switch, which is used to quickly cut off the main power supply and control circuit of the crane in emergency situations. The emergency power-off switch is installed in a convenient location for personnel to operate.
• Overload limiter: When the load reaches 90% of the rated lifting capacity, the overload limiter emits a warning signal. When the load reaches 110% of the rated lifting capacity, the lifting power supply is immediately cut off and a prohibition alarm signal is issued.
• Travel limit: The lifting mechanism is equipped with a rising and falling cut-off limit switch, which serves as a limit switch for the lifting range of the lifting mechanism and also has a protective effect against controller adhesion. The large vehicle mechanism is equipped with an operating limit limiter.
• It consists of a travel limit switch and a safety ruler. The travel limit switch is installed on the crane, and the safety ruler is installed in a place that does not hinder the operation of the crane, ensuring that the crane operates within a safe range.
• Phase failure, phase error, over-voltage, and under-voltage protection: The comprehensive protector in the crane circuit system has the protection functions of phase failure, phase error, over-voltage, and under-voltage. When the above four situations occur, it will automatically cut off the main power supply of the crane to prevent personnel injury and equipment damage.

1. Surface rust removal treatment shall be carried out on steel plates used in metal structures before welding. The surface rust removal quality level of the main beam, support legs, upper crossbeam, and lower crossbeam shall not be lower than Sa2 1/2 or St3 level in GB/T8923, and the rest of the parts shall reach Sa2 or St2 level.

2. The crane shall be painted in the color required by the user before leaving the factory, with a paint film thickness of 30-40 μ m per layer and a total thickness of 90-120 μ m. The adhesion of the paint film shall meet the first level quality requirements specified in GB9286. After long-term use, the paint surface of the equipment shows no signs of fading or peeling.

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