Double-girder bridge crane DMD 6,3 t / 18,76 m

PROJECT NAME: Double-girder bridge crane DMD 6,3 t / 18,76 m

 

INVESTOR: Metalna oprema JSC

 

LOCATION: Senj

 

YEAR OF PRODUCTION: 2007.

 

TECHNICAL CHARACTERISTICS:

  • maximum crane capacity: 6,3 t
  • bridge span: 18,76 m
  • maximum lifting height: 8,2 m
  • load lifting speed: 4/0.7 m/min
  • hoist travel speed: 20/6,5 m/min
  • bridge travel speed: 30/8 m/min

 

TECHNICAL DESCRIPTION:

For the needs of investor, compani Metalna oprema JSC, a project for the installation of a double-girder bridge crane with a maximum load capacity of 6,3 t, a bridge span of 18,76 m and a lifting height of 8,2 m was made. The crane was installed in the production hall of Metalna oprema JSC in Senj on the existing crane tracks.

 

All working movements of the crane: driving the bridge, driving the hoist and lifting/lowering the load, are driven by electric motor drives and are performed in two speeds.

 

The crane is operated from the floor via a suspended control button with reduced voltage.

 

Given the conditions and frequency of operation, the crane is classified in II. operating class according to HRN M.D1.020, which approximately corresponds to group M5 according to ISO 4301/1 (or group 2m according to FEM 1.001), for mechanisms.

 

Double-girder bridge crane consists of:

  • steel structure consisting of:
    • main girders manufactured as box girders welded from sheet metal,
    • end carriages manufactured as box girders,
    • service platform welded to the side of one main girder along its entire length,
  • electric driving hoist with a load capacity of 6.3 t,
  • electrical equipment.

 

The electrical equipment of the crane consists of:

  • electric motor of the lifting mechanism with brake,
  • electric motors for driving a hoist,
  • two electric motors to drive the bridge,
  • control cabinet,
  • suspended control button with reduced voltage,
  • main switches, and
  • power and control cables within the crane itself.

 

At the ends of the crane tracks, steel bumpers are placed as safety against the crane falling off the tracks, and rubber bumpers are against stiff impact into the obstacle. In the same way, the movement of the driving hoist along the main girder of the double-girder bridge crane is limited.