Belt conveyor is the main tool to transport coal, its damage and repair will affect the production of coal, making the whole production line in a stagnant state. The protection and control of the belt conveyor is an important part in the process of coal production, the market also has a lot of protection device of the belt conveyor, the main is to detect the belt conveyor, when there is deviation, tension, temperature, smoke, tear and speed of failure for voice alarm. In this paper, after a large number of investigation and research, the improvement of the belt conveyor protection and control design is put forward.The protection device of the belt conveyor mainly realizes eight major protections, such as deviation, tension, temperature, smoke, coal position, tear, speed and emergency stop. When a fault occurs, the protection device will give voice alarm and display alarm according to the fault.It’s very important for ISO conveyor rollers.
The speed protection and control of the belt conveyor’s direct start makes the tension of the conveyor belt increase by several times, which has a great impact on the components of the conveyor, and affects the stability and service life of the components, conveyor belts and the whole machine. Although the price of the soft starter is lower than that of the frequency converter, because the design device will have speed control when the conveyor works normally, the control device of the soft start uses the speed control device of the transducer. When the control system starts or stops, the frequency converter starts to work. The frequency converter can automatically track the motor’s frequency, voltage and phase, and achieve the same frequency, the same voltage and the same phase switching. The switching process is very stable, so the current will not change much.The speed of protection and control in addition to start and stop state, the speed of the conveyor belt in the 10s (50%c~70%c) when the rated speed, rated speed or speed to be 50%, or 110% of the rated speed with speed, speed control device should work to achieve the frequency control. After a certain period of time, if the speed is still overrun, in Zhidai conveyor operation.When the two way emergency switch is applied to 40~ 120N force on any side of the drawing line, the inverter controls the operation of the belt conveyor, so that the belt conveyor can be stably terminating, and it can be self locked and reset.It’s very important for ISO conveyor rollers.
When running deviation, the control system starts the rectifying device in time, and the alarm light is lit at the same time. When the deflection angle of the probe bar of the deviation sensor reaches the set value, the voice alarm is started and the belt conveyor is forced to stop. When the belt conveyor stops running, the rectifying device can be started manually.Tension protection and control. When the tension sensor detection device detects the loosening of the conveyor belt, the alarm lamp is bright, so that the tension device tightens the conveyor belt. Conversely, when the conveyor belt is too tight, the tension device looses the conveyor belt, so as to effectively control the tension degree of the belt conveyor. When the belt tensioning degree exceeds the limit, start the voice alarm, and in Zhidai conveyor operation.Temperature, smoke protection and control, when the temperature of the temperature sensor of the temperature sensor exceeds the set value, the alarm light is bright, and the water spray is cooled at the same time. When the temperature is still high for more than a certain time, the voice alarm is started and the belt conveyor is stopped.
Smoke protection and control of continuous 2S, when the smoke is monitored environment coal concentration exceeds the speed detection device detecting speed detection device control device of emergency stop control device of liquid crystal display keyboard input to microcontroller settings, alarm lights, and reduce the smoke density of water. When the smoke concentration is still high for more than a certain time, the voice alarm is started and the belt conveyor is stopped.It’s very important for ISO conveyor rollers.
The working environment of the belt conveyor is generally bad. Therefore, during the operation of the belt conveyor, it is necessary to detect the performance and protective parameters of the belt conveyor in time, so as to ensure the safe, efficient and stable operation of the belt conveyor. The protection and control of the belt conveyor in time can greatly reduce the cost and improve the production efficiency.