Prevention and Treatment of Conveyor Belt Deviation
(1) The basic law of conveyor belt deviation
Conveyor belt deviation is a common accident of belt conveyors. In production, people have summarized the basic laws of conveyor belt deviation through practice and exploration, providing a reliable basis for preventing and dealing with accidents. Conveyor belt deviation The basic rules are:
- Too large but not too small, the diameters on both sides of the roller and the roller are different, and the conveyor belt will deviate to the larger side during operation.
- It is high but not low. The supporting device causes the two sides of the conveyor belt to be not on the same level, and the conveyor belt deviates to the high side during operation.
- Tight but not loose. The tightness of the two sides of the conveyor belt is different, and the conveyor belt deviates to the tight side during operation.
- Backward not forward. Based on the running direction of the conveyor belt, if the idler or roller is not on the vertical section of the running direction, and one side is behind and the other is forward, the conveyor belt will deviate to the rear side during operation.
(2) The reason for the deviation of the conveyor belt
The diameters of the two ends of the transmission drum or the tail drum are different;
There is slime or other protrusions on the surface of the drum or idler;
The head drive roller is not parallel to the tail roller;
The center line of the drive drum and the tail drum shaft is not perpendicular to the center line of the fuselage;
Improper installation of idler;
The feeding position is incorrect;
The center of the drum is not on the center line of the fuselage;
The conveyor belt joint is not correct or the conveyor belt is aging and deteriorating, causing deflection on both sides;
The body is incorrect.
(3) Hazards of conveyor belt deviation
The deviation of the conveyor belt will not only affect the production, but also damage the conveyor belt. When a non-flame-retardant conveyor belt is used, the running resistance of the conveyor belt will also increase due to deviation, which will cause the conveyor belt to slip, which may cause a mine fire accident.
(4) Conveyor belt deviation prevention and treatment
- Preventive measures
Improve installation quality;
Improve the quality of conveyor belt joints;
Strengthen patrol inspection and maintenance;
Ensure that the loading is not biased;
Make sure the cleaning device is working properly.
- On-site treatment method
Automatic idler deviation adjustment: when the deviation range of the conveyor belt is not large, the self-aligning idler can be installed at the deviation of the conveyor belt.
One-side vertical roller deviation adjustment: the conveyor belt always deviates to one side, and several vertical rollers can be installed within the deviation range of the deviation side to reset the conveyor belt.
Moderate tension adjustment: When the conveyor belt deviates from left to right, and the direction is irregular, it means that the conveyor belt is too loose, and the tensioning device can be adjusted appropriately to eliminate the deviation.
Adjust the deviation of the drum: the conveyor belt is deviated at the drum, check whether the drum is abnormal or moving, adjust the drum to the horizontal position and rotate normally to eliminate the deviation.
Correcting the deviation of the conveyor belt joint: the deviation of the conveyor belt is always in one direction, and the maximum deviation is at the joint. The conveyor belt joint can be corrected to be perpendicular to the center line of the conveyor belt to eliminate the deviation.
Pad height idler deviation adjustment: The conveyor belt has a certain deviation direction and distance. Several groups of idler rollers can be elevated on the opposite side of the deviation direction to eliminate the deviation.
Adjust the deviation of the idler: the deviation direction of the conveyor belt is certain. If the center line of the idler is found not perpendicular to the center line of the conveyor belt, the idler can be adjusted to eliminate the deviation.
Elimination of slime deviation adjustment: The deviation point of the conveyor belt remains unchanged. If it is found that the idler and the roller are sticking to the slime, the slime deviation should be eliminated.
Correction of feeding deviation: the conveyor belt does not deviate under light load, and does not deviate under heavy load, and the weight and position of the feeding material can be adjusted to eliminate deviation.
Correcting the deviation of the bracket: the direction and position of the conveyor belt deviation are fixed, and the deviation is serious. The horizontal and vertical degrees of the bracket can be adjusted to eliminate the deviation.
Prevention and Treatment of Conveyor Belt Slip
- The reason for the slippage of the conveyor belt
The conveyor belt tension is not enough;
The head of the machine sprays the water belt or pulls water charcoal on the conveyor belt, which reduces the friction coefficient between the driving roller and the conveyor belt.
Too much load on the conveyor belt.
Serious deviation, the conveyor belt is stuck.
The cleaner failed, resulting in a large foreign body between the roller and the conveyor belt.
- Hazards of conveyor belt slippage
The conveyor belt slips on the driving roller, and the surface temperature of the conveyor belt increases due to friction, and at the same time, the wear of the conveyor belt is aggravated, and it may also cause the conveyor belt to ignite and cause a fire accident or other accidents.
- Prevention of conveyor belt slippage
Specific measures to prevent conveyor belt slippage include:
Always check the tension of the conveyor belt, and moderately tighten the conveyor belt.
Frequently check the condition of the conveyor belt joints.
Take effective anti-splashing measures.
Ensure the reliable operation of the cleaning device and the anti-skid device.
The loading capacity should be controlled, and overload operation is strictly prohibited.
When the machine is stopped, the coal on the conveyor belt should be pulled out, and it should not be loaded again.
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