Double Girder Overhead Cranes from China Manufacturer

Double Girder Overhead Cranes introduction

Double girder overhead crane is a widely used lifting equipment in modern industry. It is mainly composed of two main beams, electric trolley, end beam, electrical control system and other safety devices. According to different working levels, the crane can be divided into multiple working levels from A3 to A7, and the operation methods include multiple options such as pendant control, remote control and cabin operation.

Advantages:

Sturdy structure: The double-beam design provides greater load-bearing capacity and stability, and is suitable for the handling of heavy materials.
High efficiency performance: Higher lifting speed and running speed improve work efficiency.
Flexible operation: Provides multiple operation modes, such as bracket operation, remote control and cab operation, to meet different operation requirements.
Safe and reliable: Equipped with complete safety devices to ensure safety during operation.

Application:
Double girder overhead crane is widely used in workshops, maintenance workshops, warehouses, shipyards, docks, steel mills, military and other places. The working environment temperature range is -20℃ to +40℃. It is forbidden to use in flammable, explosive and highly corrosive environments. When equipped with an electric grab as a sling, it can be used for loading and unloading and transporting bulk materials. It is not suitable to work in an environment with explosion and fire hazards, nor in places with high humidity and full of acid and alkali gases. It cannot be used to transport molten metal, toxic substances and flammable and explosive items.

Introduction to the components of double-beam bridge crane

Mechanical parts

Main beam: It adopts welded box beam, which meets the national standard for camber and is made of high-quality carbon steel Q235B or Q345B (similar to Fe37 or Fe52). The main weld adopts submerged arc automatic welding and non-destructive testing to ensure the welding quality.
Trolley: It consists of motor, reducer, brake, coupling, wheel and roller. The brake system uses asbestos-free brake pads and brake blocks, which are safe and reliable to install.
Reducer: It adopts hard tooth surface design, compact and durable structure.
End beam: It is equipped with track buffer and track gap device to enhance safety and stability.
Protection level: The overall protection level of the crane is IP54 or IP44, and the insulation level is F level to ensure electrical safety.
Braking system: The braking is effective and has a long service life to ensure stable operation of the equipment.

Protective devices

Rainproof device: Outdoor cranes are equipped with lifting mechanisms, electrical control boxes and rainproof devices to ensure the normal operation of the equipment in bad weather.
Safety limit device: Set up trolley travel limit devices and anti-collision devices to increase operational safety.
Alarm system: Equipped with sound and light alarm devices to improve safety warning effects.
Protective facilities: Set up platforms, covers, protective covers and barriers to protect the safety of operators and equipment.

Overhead Crane Features

Design

Technology

Production

Maintenance and Security

Overhead crane systems are designed in accordance with ISO, FEM and DIN standards.

Customized according to the lifting weight required by the customer's project, the operating speed of the electric hoist and the working level.

The steel plate material is general-purpose steel Q235B, and the steel plate will be pretreated by shot blasting to reach the standardization of Sa2.5 level.

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Design Scheme

SEVENCRANE stands for first-rate service, cost-effective, high quality.

The main beam and end beam are connected by high-strength bolts to ensure the accuracy and smooth operation of the whole machine.

A variable structure control scheme, a variable structure controller combined with a state feedback control scheme and an integrated control scheme are proposed to control the bridge crane.

We have a professional team of engineers to design and develop cranes, and have a complete technical system to analyze crane design drawings.

Our bridge crane component design and structure standards are certified according to DIN15018, BLATT2 and the steel structure welding standards are in accordance with DIN18800, BLATT7.

Equipped with a double-speed lifting mechanism, the running mechanisms of large and small vehicles all adopt frequency conversion stepless speed regulation.

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

The steel surface is treated with shot blasting and sand blasting to improve the adhesion of the paint and prevent the paint from peeling off, ensuring the long-term beauty of the whole machine.

Technology

The main welding seam adopts submerged arc automatic welding, non-destructive flaw detection, and the shape is beautiful to ensure the welding quality.

End beam material: high quality alloy steel Q345B.

The end beam is welded and formed by rectangular steel pipe or steel plate, and the formed end beam is positioned and processed on a CNC boring and milling machine at one time to ensure dimensional accuracy and fit tolerance.

The lifting trolley has a modular design, and the working level is FEM M4-M6. The entire lifting trolley has a compact structure, low headroom and light weight.

Production

SEVENCRANE stands for first-rate service, cost-effective, high quality.

The main girder of the crane is welded by steel plates, and the steel plate materials meet the international crane production standards. The main steel structure materials we use are not lower than Q235B, and the materials used have material reports and corresponding qualification certificates.

There are buffer blocks at both ends of the end beam to reduce the impact force of the collision and reduce the impact inertia. The beam body of the whole machine adopts shot blasting and painting process according to the world standard.

The running track of the trolley is made of square steel to increase the effective contact area of the wheel tread and reduce the weight of the track. The material of the square steel track is Q345B.

The operation room is operated by a linkage table, and is equipped with a remote control at the same time. Through the switch, it can be operated by remote control or switched between operations during operation. Lighting and seats are installed indoors, and the entrance of the operating room is end-entry, which conforms to European and international standards.

Our crane design concept is an extension of the European concept, and we have summarized our unique production technology and solutions through long-term in-depth research and application practice.

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MAINTENANCE AND SECURITY

All operators in our production workshop must hold legal operating certificates.

The cranes we produce are equipped with a safety monitoring system, which is professionally developed by the company in accordance with FEM/DIN/ISO/GB related standards, and is used for crane operation data recording, safety protection, and electronic instruments for status display.

The safety monitoring system has real-time protection functions for more than 30 working conditions such as operating failures, safety hazards and illegal operations, preventing the crane from operating in potentially dangerous situations and ensuring the safety of personnel and equipment.

Schneider TE is a vector frequency conversion control system specially developed for European crane components.

There is shock-absorbing plastic raw material derived wedges at both ends of the crane landing gear.

Overload protection, residual current relay, PTC thermistor, crash sensor, emergency stop button, sound/light warning and warning siren are standard protection units for all our overhead cranes.

At the time of delivery, we will provide customers with crane safety operation manuals and maintenance manuals. If the customer needs it, we will also send safety engineers to the site to know the customer's safe installation.

SUCCESSFUL PROJECT

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