Explosion Proof Overhead Crane 

General description

Double beam explosion proof trolley crane satisfy standards stipulated by GB3836.2-2000 Explosion-proof Electric Equipment Working in Explosive Gas Environment Part-2: Flame-proof crane. The crane has obtained Explosion-proof Certificate after passing examinations by units designated by the government to test explosion-proof products. The explosion-proof marks are ExdⅡCT4 respectively.

This product is suitable for areas where the explosion, transmission is not higher than ⅡB or ⅡC and the ignition temperature group of inflammable gas or explosive mixture of steam and gas is not lower than T4. Applicable dangerous zones are zone 1 and zone 2 (please refer to GB3836.1-2000 for details).

This product is generally controlled on the ground, but control from the driver's cabin is also allowable. The working grade is intermediate.

Detailed specification:

Lifting Capacity: 5-50/10t

Lifting Height:  16m

Span: 10.5-31.5m

Working Class: A5~A8

Explosion-proof mark: ExdIIBT4, ExdIICT4.

Steel Track Recommend: 43kg/m

Power Source: 3 phase 380V AC 50hz

 

Mechanical parts

Double welding box girder, beam deflection with DIN/FEM standard

Steel Material: Chinese standard Q235B and Q345B

Trolley rail is made of high strength hot rolled flat steel (16 Mn)

Epoxy zinc-rich painting for one bottoms and two sides of 120μm thick, to achieve a long lifespan, beautiful appearance and good luster

The girder and end beam are connected together by high strength bolts to ensure the structure strength and precision of the whole machine
The end beams are equipped with flat wheel or double rim wheels, anti-friction bearings, buffer blocks and derailment preventing end plate
Maintenance walkway is located on one side of the main girder, consisting of flower pattern plate, 1050meters handrail. 
Applied to explosion transfer capacity no 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 between T1 group and T4 group. The applicable hazardous area: 1 division or 2 division. The working duty:A5~A8.

Weihua has top advanced processing and manufacturing equipment and processing technology in the crane industry all over China, at the same time, Weihua take the head in achieve the best and better management, best and better manufacturing, Try the best to ensure the Weihua product quality and satisfy the demand of customer.

 

Safety protection system

 a.     Overload protection in the event of overload, the hoist unit switches off and only the lowering motion is possible

b.    {C}Long and cross travel limited by means of preliminary and final limit switches or Wireless anti-collision device

c.     {C}Anti-falling protection for the Three-in-One electric motor of trolley and crane prevents from accidental falling

d.    {C}All movements can be switched off by actuating the emergency-off switch at the control station via a main contact

e.    {C}High quality long time bearing polyurethane materials buffer fixed at the end of trolley travelling and crane travelling to prevent over traveling

f.     {C}Safety hook latch used for avoiding the lifted material out off from the hook

g.    {C}Audible and visual alarm device to inform the person stay near by the travelling crane.

h.    {C}Rain Cover for lifting mechanism of outdoor cranes, electric cabinet and driving mechanism

i.      {C}{C}Protective earth conductor is fitted as standard

j.      {C}{C}Voltage lower protection system

k.    {C}{C}Current overload protection system