Double Girder Overhead Crane

Double girder overhead crane is mainly composed of bridge (main beam, end beam, walking platform, cab, trolley track, etc.), trolley (lifting mechanism), crane operation mechanism, electrical and other parts etc. The double girder crane is kind of important equipment to realize mechanization and automation of production process in modern industrial production and lifting transportation.

Double girder cranes are widely used in indoor and outdoor industrial and mining enterprises, iron and steel chemical industry, railway transportation, port and wharf, logistics turnover and other departments and places for heavy materials handling. There are many different types of double girder overhead crane provided by our company shown as below:

double girder crane with good quality
Aicrane Double Girder Overhead Crane

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Types of Double Girder Overhead Crane

AQ-QD hook overhead crane is mainly used in various factories, warehouses, construction sites and other indoor workshops. According to different utilization level and load state, it can be divided into A5 and A6 working levels. The operation of the crane is completed in the cab. Our company mainly produces the rated lifting capacity of 3.2 ~ 450t.

AQ-QD double girder crane
AQ-QD double girder crane

AQ-QD overhead crane parameters:

  • Load capacity: 5-450t
  • Span: 10.5-31.5m
  • Lifting height: 6-24m
  • Lifting speed: 2.1-11.5m/min
  • Trolley running speed: 27-40m/min
  • Crane running speed: 42-75m/min
  • Work duty: A3-A7

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AQ-LH type electric hoist overhead crane has the advantages of compact overall dimension, low building clearance height, light self weight and small wheel pressure. The double girder crane is mainly suitable for the transfer, assembly, maintenance and loading and unloading operations of machining workshop, auxiliary workshop, warehouse, stock yard, power station, etc.

It can also replace the ordinary double girder overhead crane and be used in the workshops of light textile industry and food industry. The working type is light and medium, and the working environment temperature is – 20-40 ℃. It is forbidden to use the cranes in inflammable, explosive and corrosive medium environment.

LH overhead crane
AQ-LH overhead crane

AQ-LH hoist overhead crane parameter:

  • Load capacity: 5-50t
  • Span: 10.5-31.5 m
  • Lifting height: 6-30m
  • Lifting speed: 0.18-8m/min
  • Trolley running speed: 20m/min
  • Crane running speed: 20m/min
  • Work duty: A3, A4

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AQ-NLH electric double girder overhead crane is designed and manufactured according to the advanced European FEM standard. The overall technical level has reached the advanced international and domestic leading level. The crane steel structure design is reasonable, the structure is optimized, meets the specifications and standards, and meets the requirements of strength, rigidity and stability.

The working environment of the site shall be fully considered in the design; the convenience and possibility of manufacturing, inspection, transportation, installation and maintenance shall be considered in the design of steel structure.

AQ-NLH European overhead crane
AQ-NLH overhead crane

AQ-NLH European overhead crane parameter:

  • Load capacity: 5-80t
  • Span: 10.5-31.5m
  • Lifting height: 6-18m
  • Lifting speed: 0.4-5m/min
  • Trolley running speed: 2-20m/min
  • Crane running speed: 3-30m/min
  • Work duty: A5

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The explosion-proof performance of all motors and electrical appliances of AQ-QB explosion-proof overhead crane conforms to GB3836.2-2000 explosion-proof electrical equipment for explosive gas environment Part 2: explosion-proof type “d”, and the performance of the whole crane conforms to the provisions of JB / T5897-2006 explosion-proof crane. After the inspection contract of explosion-proof product inspection unit designated by the state, it has obtained the explosion-proof certificate.

The explosion-proof signs are Exd Ⅱ BT4 and Exd Ⅱ cT4 respectively. This overhead crane is applicable to the places where the explosion transmission capacity in the factory is not higher than Ⅱ B or Ⅱ C, the ignition temperature group is T1-T4 combustible gas or explosive gas mixture formed by steam and air, and the dangerous area is zone 1 or zone 2 (see GB3836.2-2000 for details).

AQ-QB explosion proof crane
AQ-QB explosion proof crane

AQ-QB explosion proof crane parameters:

  • Load capacity: 5-75t
  • Span: 10.5-31.5 m
  • Lifting height: 6-20m
  • Lifting speed: 1.9-5m/min
  • Trolley running speed: 10.5-20.5m/min
  • Crane running speed: 15.4-22.3m/min
  • Explosion-proof grade: ExdⅡBT4、ExdⅡCT4
  • Work duty: A3-A4

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AQ-QZ grab overhead crane is widely used in power plants, freight yards, workshops, docks etc for bulk handling and transportation.

AQ-QZ grab crane
AQ-QZ grab crane

AQ-QZ grab crane parameters:

  • Load capacity: 5-20t
  • Span: 10.5-31.5m
  • Lifting height: 6-26m
  • Lifting speed: 30.7-39.3m/min
  • Trolley running speed: 31.1-44.6m/min
  • Crane running speed: 76.9-93.6m/min
  • Work duty: A5-A7

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AQ-QC type electromagnetic overhead crane is mainly used for plate, profile, scrap and other metal materials handling. The crane is a heavy duty system with a working level of A6. The rated lifting capacity is generally 5 ~ 50t, the electromagnetic chuck is hung under the hook and can also be removed. The rated lifting capacity includes the self weight of magnetic chuck.

AQ-QC magnetic crane
AQ-QC electromagnetic crane

AQ-QC electromagnetic overhead crane parameters:

  • Load capacity: 5-50t
  • Span: 10.5-31.5 m
  • Lifting height: 6-16m
  • Lifting speed: 7.8-15.5m/min
  • Trolley running speed: 31.3-40.1m/min
  • Crane running speed: 58.5-70.6m/min
  • Work duty: A5-A7

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AQ-QDY foundry crane is the main equipment in steel-making and continuous casting process. It is mainly used for lifting and transporting molten metal. The features of the foundry crane mainly include: high security requirements; frequent use, high level of work; harsh environment with high temperature and dust; it is easy to cause great losses and serious consequences in case of failure.

AQ-QDY foundry crane
AQ-QDY foundry crane

AQ-QDY foundry crane parameters:

  • Load capacity: 5-320t
  • Span: 10.5-31.5 m
  • Lifting height: 6-24m
  • Lifting speed: 6-13m/min
  • Trolley running speed: 36-45.9m/min
  • Crane running speed: 63-118.6m/min
  • Work duty: A6-A8

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What Are the Main Components of Overhead Crane?

Overhead crane is generally composed of main beam, end beam, hoisting mechanism, crane moving mechanism, control room, trolley conductive device (auxiliary slide line), crane main power conductive device (main slide line), etc.

The lifting mechanism is composed of hoisting motor, reducer, drum, brake, etc. The lifting motor is connected with the reducer through the coupling, brake wheel, and the output shaft of the reducer is connected with the winding drum of the steel wire rope. The other end of the steel wire rope is equipped with a hook. When the drum rotates, the hook rises or falls with the winding or releasing of the steel wire rope on the drum.

The heavy objects on the hook moves up and down with the rotation of the drum; the trolley moves left and right in the width direction of the workshop, and moves forward and backward with the cart in the length direction of the workshop.

In this way, it can realize the movement of heavy objects in the perpendicular, horizontal and vertical directions, move the heavy objects to any position in the workshop, and complete the lifting and transportation task.

Choose Reliable and Reputable Overhead Crane Manufacturer

Double girder overhead cranes are designed and produced in different styles with different configurations to suit different work requirements. As a professional crane manufacturer in this industry, we have many clients from all over the world and we provide different crane solutions to meet their different work needs.

Overhead cranes make the heavy loads lifting and moving easier and safer, and they are more and more widely used in maintenance and assembly workshop, production factory, construction site, stock yard etc. If you have the need of the double girder cranes, please contact us and we will reply to you very quickly. For a professional and reliable crane solution, just cooperate with us and choose us as your partner.


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