Belt Conveyors
0
(Design , Cement )
- The belt conveyor when over-head, is installed on / in super structure (gantry, gallery, trestles, transfer houses).
The belt conveyor is mechanical equipment, and it includes all mechanical, including supporting frame for mechanical items. This supporting frame is called ‘conveyor frame’ (say chassis). Thus, name belt conveyor includes belt, pulleys, idlers, scrapers, drive unit, stringer, stands, head terminal, tail terminal, bend pulley support, take-up, skirt board, discharge end hood, spout, etc.
The belt conveyor as stated above is supported by super structure. The conveyor super structure has following 3 functions:
1) Provide supporting floor to conveyor.
2) Protect conveyor from environment (sunlight, rain, stormy wind, snow, etc. as applicable).
3) Provide access, floor, etc. for regular operation, inspection and maintenance of conveyor.
The belt conveyor designer (mechanical) decides the conveyor arrangement basic drg including space around it, super structure dimensional feature in context of operation, maintenance, etc. He also decides trestle type / location in consultation with structural engineer. The conveyor designer also depict cable place / space, in consultation with electrical engineer. Then this basic drg copy goes to structural engineer, electrical engineer and civil engineer. The conveyor designer inform load / forces acting at all footings of conveyor frame. He also informs the stage - 1 design output and conveyor’s important technical features along with the basic drawing. The loads / forces at each footing comprise of:
- Horizontal force - X along conveyor length, toward head or tail. Mostly this will constitute shear force at footing interface.
- Horizontal force - Y along conveyor width. Mostly this will constitute shear force at footing interface.
- Vertical force - Z, up or down. Mostly this will constitute compressive or tensile load.
The conveyor designer also inform live load on floor / walkway depending upon the conveyor components heaviness, etc.
Thus now structural designer has conveyor basic drg showing conveyor and super structure; and also the load applied by conveyor, on to super structure.
The structural designer designs the structure, as per the well known and established design procedure, taking care of the equipment load, wind load, earth-quake, erection load, applicable statutory codes and standards in the country of installation, etc. After completing the structural design, the designer informs to the mechanical designer, the rectification necessary in the conveyor arrangement drg made earlier (mechanical), which becomes an agreed basic drg by all concerned. Similarly, comment from electrical engineer and civil engineer is also taken care in basic arrangement drg.
The structural dept creates structural arrangement drgs and manufacturing drgs in conformity with agreed specification, and applicable standards and to provide sound supporting structure for the conveyor. The above narration mentions straight line interaction between mechanical, structural, electrical and civil, but in reality it is to and fro, as an ongoing process during initial phase of project implementation.
The belt conveyor is mechanical equipment, and it includes all mechanical, including supporting frame for mechanical items. This supporting frame is called ‘conveyor frame’ (say chassis). Thus, name belt conveyor includes belt, pulleys, idlers, scrapers, drive unit, stringer, stands, head terminal, tail terminal, bend pulley support, take-up, skirt board, discharge end hood, spout, etc.
The belt conveyor as stated above is supported by super structure. The conveyor super structure has following 3 functions:
1) Provide supporting floor to conveyor.
2) Protect conveyor from environment (sunlight, rain, stormy wind, snow, etc. as applicable).
3) Provide access, floor, etc. for regular operation, inspection and maintenance of conveyor.
The belt conveyor designer (mechanical) decides the conveyor arrangement basic drg including space around it, super structure dimensional feature in context of operation, maintenance, etc. He also decides trestle type / location in consultation with structural engineer. The conveyor designer also depict cable place / space, in consultation with electrical engineer. Then this basic drg copy goes to structural engineer, electrical engineer and civil engineer. The conveyor designer inform load / forces acting at all footings of conveyor frame. He also informs the stage - 1 design output and conveyor’s important technical features along with the basic drawing. The loads / forces at each footing comprise of:
- Horizontal force - X along conveyor length, toward head or tail. Mostly this will constitute shear force at footing interface.
- Horizontal force - Y along conveyor width. Mostly this will constitute shear force at footing interface.
- Vertical force - Z, up or down. Mostly this will constitute compressive or tensile load.
The conveyor designer also inform live load on floor / walkway depending upon the conveyor components heaviness, etc.
Thus now structural designer has conveyor basic drg showing conveyor and super structure; and also the load applied by conveyor, on to super structure.
The structural designer designs the structure, as per the well known and established design procedure, taking care of the equipment load, wind load, earth-quake, erection load, applicable statutory codes and standards in the country of installation, etc. After completing the structural design, the designer informs to the mechanical designer, the rectification necessary in the conveyor arrangement drg made earlier (mechanical), which becomes an agreed basic drg by all concerned. Similarly, comment from electrical engineer and civil engineer is also taken care in basic arrangement drg.
The structural dept creates structural arrangement drgs and manufacturing drgs in conformity with agreed specification, and applicable standards and to provide sound supporting structure for the conveyor. The above narration mentions straight line interaction between mechanical, structural, electrical and civil, but in reality it is to and fro, as an ongoing process during initial phase of project implementation.