Double Girder Overhead Crane
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QB Series Double Girder Explosion Proof Bridge Crane

QB Double Girder Explosion Proof Overhead Crane

Lifting Capacity:5t to 75t
Span:10.5m to 31.5m
Lifting Height:6m to 18m
Working Class:A4, A5
Ambient Temperature:-20℃ to 60℃

Explosion Proof Bridge Crane Introduction

QB series double girder explosion proof bridge crane is one of the handling equipment for all kinds of anti-explosion and dangerous environment materials. The QB explosion proof crane has the technical characteristics of preventing the explosion caused by arc, spark and overheating. All electrical and electrical equipment are manufactured in accordance with international standards and regulations.

The lifting capacity of the explosion-proof bridge crane is 5-75 tons, and the working class is A4 and A5.

Technical data of QB Explosion Proof Overhead Cranes

The specific parameters are shown in the following:

Lifting heightm6~18
Lifting speedm/min554.24.131.9
Trolley speedm/min19.620.520.52019.110.5
Crane speedm/min22.322.3191719.415.4
Work duty
Explosion-proof GradeExdⅡBT4、ExdⅡCT4
Track type
P43P43P43 or QU70QU70 or  90*90QU80 or 100*100QU100

Components of Explosion Proof Overhead Crane

QB series double girder explosion proof bridge crane is mainly consists of crane bridge, winch lifting mechanism, crane traveling mechanism, electrical equipment and so on. The cooperation and coordination between them is the key to ensure the safe and reliable operation of the flame proof cranes. 

The explosion proof overhead crane is an intermediate working system. All electrical equipment of the flame proof crane has explosion-proof performance, the mechanical part also adopts the corresponding explosion-proof measures, in order to prevent the crane in the process of operation may produce sparks and cause combustion or explosion accidents.

explosion proof bridge crane drawing

Application of Explosion Proof Bridge Crane

The Explosion proof marks are Exd Ⅱ BT4 and Exd Ⅱ CT4.

Explosion proof bridge crane is applied to sites, where is not higher than the II B or II C-class, and the sites with explosive air mixture formed with inflammable gas (or steam) and air whose factory ignition temperature groups of not less than the T4 group.

DJCREANES designs and manufactures the material handling equipment for the harsh and hazardous application environments, such as, chemical plants, gas power plants, paint shops, oil refineries, and waste water treatment plants, etc.

Advantages of Explosion Proof Bridge Crane

■   Innovative structure

■   Attractive appearance

■   Advanced technology

■   Flexible and smooth operation

■   High safety and reliability

■   Energy-saving and efficient

■   Intelligent control

■   Low maintenance cost, long service life

■   Quiet operation

■   Have a broad vision

What is explosion-proof principle of QB type explosion-proof bridge cranes?

The explosion-proof principle of QB type explosion-proof bridge crane is to take corresponding measures to prevent generating spark. That is, the use of appropriate explosion-proof technology to control and eliminate electrical and mechanical sparks, so that they cannot ignite flammable gas mixtures and environmental areas. For combustible dust and mechanical sparks, the parts that are prone to dangerous sparks use special non-sparking materials to control the content of magnesium and titanium in light alloy shells, so as to avoid collision and friction between relatively moving mechanical parts, thereby achieving explosion protection.

Which safety measures should be taken when using explosion-proof overhead cranes? 

  Provide appropriate training for all operators and maintenance personnel.

  Periodically check and maintain all components.

■  Use appropriate personal protective equipment (PPE), such as safety helmet, safety glasses, and gloves.

  Proper grounding of all electrical equipment.

  Proper ventilation of the work area to prevent the accumulation of flammable gases or vapors.

■  Correct storage and handling of all flammable materials.

Explosion Proof Double Girder Overhead Crane


Explosion Proof Double Girder Overhead Crane

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