5. If feeding pipe jam in the head and belt conveyor is not found in time, a large number of materials will accumulate on the head and non-working face, press the belt, causing slipping. Solution: In order to prevent this kind of situation from happening, the attendant should pay attention to the change of materials on the belt during the operation of the belt conveyor, give more frequent inspection of the head feeding pipe when it becomes sticky, and clean up the sticky materials in time to avoid the occurrence of blocking. Even if it cannot be avoided, the blocking amount should be controlled as far as possible.
6. The conveyor belt
is partially jammed. When a certain part of the conveyor belt is strongly blocked, the belt will slip. This kind of situation usually occurs at the head, tail and tensioning device of belt conveyor, for example, the head and tail of belt conveyor are jammed with foreign matters, the tail redirection roller does not rotate, etc.
Solution: During operation, the monitoring of belt conveyor current should be strengthened. In case of abnormal current changes, the machine should be stopped immediately for inspection, and the machine can be started again only after finding out the reasons and removing the obstacles.
7. Slipping Speed Measuring Device. Faulty belt conveyor is generally equipped with a slipping speed measuring device. When slipping occurs, it will send out a fault signal and stop the operation of the belt conveyor. The skid speed measuring device mainly consists of a speed measuring wheel and a control box, wherein the speed measuring wheel is directly contacted with a belt and is driven to rotate by the belt. When there is sticky material on the speed measuring wheel or there is poor contact with the belt, the device will mistakenly send a slipping signal to stop the belt conveyor. This kind of situation is more frequent in actual operation, and the electrical circuit faults in the control box will occasionally send slipping signals by mistake.
Solution: When the belt conveyor stops due to slipping fault, it should first be checked on site to determine whether the belt conveyor has actually slipped. If the speed measuring device mistakenly sends a slipping signal, it should be checked and processed. The general method of treatment is to remove the sticky material on the speed measuring wheel, adjust its position and eliminate the electrical circuit fault.
8. When starting the belt conveyor, the brake cannot be turned on. When starting the belt conveyor, it will sometimes slip and stop because the brake cannot be turned on. The belt conveyor driving device cannot rotate under the control of the brake when the motor circuit has been switched on. On - site inspection will show that the motor is buzzing, while the belt and its driving device are not operating.
9. The wrap angle between the driving wheel and the belt or the friction coefficient is too small. Usually, the wrap angle between the driving wheel and the belt should not be less than 120 degrees. If it is too small, the belt conveyor will slip easily.
Solution: If the wrap angle between the driving wheel and the belt is small and the position of the tension wheel cannot be effectively increased by adjusting, the design may need to be modified. Therefore, these factors should be carefully considered during the preliminary design to ensure the design quality of the belt conveyor. If problems are found only during assembly and debugging, it will be very passive to revise the design. In addition, if the friction coefficient between the driving wheel and the belt is too small, the belt will slip. Solution: Carefully observe whether the surface of the driving wheel of the conveyor is too smooth, otherwise, use knurled structure or inlay a layer of rubber before testing. Slipping is one of the common faults of belt conveyor. If the belt conveyor can be operated in a standard way, checked carefully and maintained carefully, the occurrence of slipping can be lowered to a great extent. Even after the fault occurs, we can make accurate judgment and treatment through the above methods, thus ensuring the safe and stable operation of the powered belt conveyor system