Strengthening the regular inspection and maintenance of conveyor belts and conveyors can prolong the service life of conveyor belts. When checking the conveyor belt, mainly check the following parts:
- loading point:
The loading point is the vulnerable part of the conveyor belt. Belt speed as well as material particle size, impact force, and direction of load travel with respect to conveyor belt operation are important factors to be aware of. The width of the receiving end of the blanking chute should be large enough.
Loading material at an angle between the running direction of the belt will only increase the wear of the belt surface. The impact of the material on the conveyor belt and the off-center feeding will cause the conveyor belt to climb up to the other side along the rotating idler roller and deviate, eventually causing damage to the belt edge rubber and aggravating the wear of the local surface rubber.
Materials with large specific gravity and sharp edges and corners will cause a certain impact or sliding on the fast-moving tape, and will also scratch and wear the surface.
The general way to reduce this wear is to put the powdered material on the belt first, and then the bulk material, so that the powdered material acts as a cushion to protect the belt. Screen bars with a certain spacing are set at the blanking chute, and the finely crushed materials first fall on the belt through the gaps of the screen bars to form a cushion layer. the impact of the material on the belt.
Impact bed and impact bars also can be used to reduce the impact force of the material at the loading point, protect the belt, and prolong the life of the conveyor belt.
Tip: The flame retardant impact bar is used together with the buffer bracket to form a flame retardant impact bed. The main users are: underground use in the coal mining industry; power plants; coal coking industry.
Flame retardant antistatic impact bars is a special product for underground wells, so customers must choose carefully, not only from product quality, but also from installation guidance and technical support.
- Guide groove:
The guide groove is another cause of wear on the surface of the belt. The closer it is to the belt, the greater the wear. The guide groove should not be in contact with the belt, and there should be a certain gap between the bottom edge and the belt. The rubber sheet (skirt rubber) on the lower edge of the guide chute should be checked frequently to prevent the material from being stuck. The fixed part of the loading point device must not come into contact with the belt surface, nor allow the material to get stuck in the guide groove.
- All drums should be flexible.
Improper selection of drum diameter will adversely affect the service life of the belt. If there are many attachments on the drum, it will lead to the deviation of the conveyor belt, abnormal wear of the covering rubber and local damage or even rupture of the belt core.
Therefore, it should be checked frequently and removed in time. The drive roller is covered with rubber sheet to increase the coefficient of friction, reduce tension, and reduce slippage caused by wet conditions. Use RIT diamond rubber sheets or RIT ceramic rubber sheets matching with belt metal primer and cleaning solvent to improve cleaning on rubber sheets and conveyor belts and extend roller life. When the outer rubber plate of the drum is abnormally worn, it should be replaced as soon as possible.
- Upper and lower idlers
When inspecting the idler, the foreign matter attached to the surface of the idler should be removed, especially the lower idler. The attachment may sometimes cause the conveyor belt to deviate and cause belt edge damage. Damaged, non-rotating idlers must be replaced in time.
In addition, the management and lubrication regulations of idlers should be strictly observed. Too much butter will leak to the conveyor belt. After the surface of the conveyor belt is stained with butter and lubricating oil, the rubber will become soft, expand, delaminate, peel off, and even cause The rotation of the conveyor belt and the pulley is not synchronized, which causes abnormal wear of the rubber belt.
The different positions of the upper idlers and the improper setting of the inclined and curved parts (curvature radius) will cause the belt to bend abnormally and cause fatigue damage, which will increase the wear of the non-working surface of the belt and cause longitudinal cracks. When there is material on the surface of the roller, the roller will bulge, causing the belt to jump during operation, dropping the material, and even causing damage to the belt, so it must be removed in time.
Check whether the tensioning device can move, the stroke size, and whether the sliding condition of the guide frame is in good condition, and regularly fill the guide frame with oil. Insufficient tensioning travel reduces the safety of the tensioner. Excessive tension will accelerate the fatigue of the conveyor belt, thereby increasing the elongation of the conveyor belt, and ultimately affecting the normal operation of the conveyor belt, and it needs to be jointing again if necessary. If the tension is too small, the belt slips on the driving roller, which also accelerates the wear of the belt. Therefore, the tension or stroke of the tensioning device should be adjusted in time.
- Conveyor belt
The inspection of the conveyor belt includes whether the upper and lower surfaces are damaged, whether the belt edge is damaged, whether the belt core skeleton is damaged, and whether the joints are tripped, glued, delaminated, displaced, skewed, etc. If the damage is found, simple partial repair should be carried out immediately. RIT repair strip and cold vulcanizing adhesive SA3000 or quick repair rubber can be used to repair. When the damage is large, it should be stopped immediately for complete repair or hot splicing joint. Vulcanizing press, tie gum and cover rubber, hot vulcanizing cement and splicing kits can be used. If the damage is serious, it must be replaced.