Conveyor belt, Inspection and Condition Monitoring (running)

Purpose: 
  • To provide an indication of defects and their consequences on the belt conveyor behavior under operating conditions.
  • The inspection in running condition is a walk by inspection, is quick and requires relatively low qualification level. It is carried out on a regular and short term basis using the five human senses with no special equipment. It should be done by all personnel going along the equipment, but must also be formalized.
  • Monitoring devices are installed to avoid or reduce the impact of defects and failures. The measurement in this case is often continuous, linked with automation systems

 

Description: 

Belt

  • The belt is inspected in a non loaded area to check for defects, damage or clogging., The check duration must cover the total belt length. The splice must be checked very carefully..
  • The belt is checked for cleanliness
  • The belt is checked for traveling, in its width direction along the whole length, to detect bowed belts or non-squared splices.
  • The belt is checked for alignment (vacant space on the outer rollers) in different areas; misaligned areas are recorded. Special limit switches can be installed to check for deviation, alarming and switching off the belt in case of excessive drift.
  • Belt alignment is checked on all pulleys
  • Mechanical or electronic devices can be used to check for longitudinal cracks (damage by foreign bodies)

Pulleys

  • Check rotation, noise, vibration and temperature of bearings and cleanliness of parts
  • Check for buildup on the drum
  • Check tail pulley rotation monitoring devices

Idlers

  • Check for presence and fixation of rollers
  • All idlers are checked to be turning, all defects of design (like belt not touching) are reported
  • Unusual  noises along the conveyor are recorded and rollers also checked when the belt is stopped.
  • Belt aligning idlers are checked to be free of movement. Static aligning  idlers are checked to be installed in the correct direction
  • Check rollers for build up, particularly return idlers. Analyze root cause of problems
  • Check spillage piles above return idlers. Analyze origin

Chutes

  • Inspect for spillage, determine root cause, mark and register source location
  • Check alignment of material on the belt
  • Check skirting presence, wear, position, efficiency, material presence between skirt and belt
  • Check for stability, fixation
  • Check for dust emission
  • Switch for overload can be installed

Take ups

  • Check for free movement in operation, particularly during starting phase
  • Check that counterweight is free of material (increased weight)
  • Check drum is correctly aligned
  • Check switches for lateral guidance

Cleaning devices

  • Check for presence, wear (straightness and remaining material), position and efficiency
  • Check attachments carefully
  • Check for buildup
  • Check for movement depending on the type

Structure and surrounding

  • Presence of covers, safety protection devices (siren or flash at start-up), spillages or foreign objects, housekeeping from previous maintenance works
  • Check straightness, deformation, bending of the structure
  • Check for corrosion, paint presence…

Drive

  • Check temperature, oil level, vibration, fixation, cleanliness, guards presence and fixation, abnormal noise
  • Amperes monitoring

 

Safety Switches

  • Check presence and condition of lanyard switches and other safety systems
Belt

  • The belt is inspected in a non loaded area to check for defects, damage or clogging., The check duration must cover the total belt length. The splice must be checked very carefully..
  • The belt is checked for cleanliness
  • The belt is checked for traveling, in its width direction along the whole length, to detect bowed belts or non-squared splices.
  • The belt is checked for alignment (vacant space on the outer rollers) in different areas; misaligned areas are recorded. Special limit switches can be installed to check for deviation, alarming and switching off the belt in case of excessive drift.
  • Belt alignment is checked on all pulleys
  • Mechanical or electronic devices can be used to check for longitudinal cracks (damage by foreign bodies)

Pulleys

  • Check rotation, noise, vibration and temperature of bearings and cleanliness of parts
  • Check for buildup on the drum
  • Check tail pulley rotation monitoring devices

Idlers

  • Check for presence and fixation of rollers
  • All idlers are checked to be turning, all defects of design (like belt not touching) are reported
  • Unusual  noises along the conveyor are recorded and rollers also checked when the belt is stopped.
  • Belt aligning idlers are checked to be free of movement. Static aligning  idlers are checked to be installed in the correct direction
  • Check rollers for build up, particularly return idlers. Analyze root cause of problems
  • Check spillage piles above return idlers. Analyze origin

Chutes

  • Inspect for spillage, determine root cause, mark and register source location
  • Check alignment of material on the belt
  • Check skirting presence, wear, position, efficiency, material presence between skirt and belt
  • Check for stability, fixation
  • Check for dust emission
  • Switch for overload can be installed

Take ups

  • Check for free movement in operation, particularly during starting phase
  • Check that counterweight is free of material (increased weight)
  • Check drum is correctly aligned
  • Check switches for lateral guidance

Cleaning devices

  • Check for presence, wear (straightness and remaining material), position and efficiency
  • Check attachments carefully
  • Check for buildup
  • Check for movement depending on the type

Structure and surrounding

  • Presence of covers, safety protection devices (siren or flash at start-up), spillages or foreign objects, housekeeping from previous maintenance works
  • Check straightness, deformation, bending of the structure
  • Check for corrosion, paint presence…

Drive

  • Check temperature, oil level, vibration, fixation, cleanliness, guards presence and fixation, abnormal noise
  • Amperes monitoring

 

Safety Switches

  • Check presence and condition of lanyard switches and other safety systems
  • Inspection sheet and schedule
  • Improper preventive maintenance
  • Training
  • Organization
  • Execution of a belt inspection

See site specific unit for additional information, respective actions and applicable safety instructions.

 

Post author