Judging whether the pipe chain conveyor is in normal operation by changes in current

Pipe chain conveyor is a continuous conveying equipment widely used in industries such as chemical, food, pharmaceutical, and building materials. Its working principle is to drive the disc to move inside the pipeline through the chain, thereby achieving material transportation. Due to its complex structure and diverse operating environment, the operational status of the pipe chain conveyor directly affects production efficiency and equipment lifespan. Therefore, how to determine whether the pipe chain conveyor is in normal operation through current changes has become an important issue in equipment maintenance and fault diagnosis.

1、 The operating principle and current relationship of pipe chain conveyor

The core power source of the pipe chain conveyor is the motor, which drives the chain and disc movement through a reducer. The operating status of the motor can be reflected by changes in current. Under normal operating conditions, the current value of the motor will remain within a relatively stable range. However, when the device malfunctions, the current value will undergo significant changes. Therefore, monitoring the current changes of the motor can provide important basis for judging the operating status of the pipe chain conveyor.

1. Current characteristics under normal operating conditions

When the chain conveyor is running normally, the load of the motor is relatively stable, and the current value will fluctuate around the rated current. Specifically manifested as:

-Stable current value: The current fluctuation range is small, usually not exceeding ± 5% of the rated current.

-No obvious mutation: The current curve is smooth and there will be no sudden increase or decrease.

-Matching with load: The current value is proportional to the load of the conveyed material. When the load increases, the current slightly increases, and when the load decreases, the current slightly decreases, but overall it remains within a reasonable range.

2. Current characteristics under abnormal operating conditions

When the chain conveyor malfunctions or runs abnormally, the current value will change. Common abnormal current characteristics include:

-High current: The current value significantly exceeds the rated current, which may be caused by excessive load, chain jamming, bearing damage, and other reasons.

-Low current: The current value is significantly lower than the rated current, which may be caused by chain breakage, motor idling, material blockage, and other reasons.

-Intense current fluctuations: Frequent fluctuations in current values may be caused by loose chains, worn discs, motor failures, and other reasons.

-Sudden interruption of current: The current value suddenly drops to zero, which may be caused by power failure, motor burnout, control circuit disconnection, and other reasons.

2、 Method for determining the operating status of a pipe chain conveyor through changes in current

1. Real time monitoring of current values

Install a current monitoring device to collect real-time current data of the motor, and record and analyze it through a display screen or remote monitoring system. By comparing the real-time current value with the rated current value, the operating status of the equipment can be preliminarily determined.

2. Analyze the current curve

Draw the current curve during the operation of the motor and observe the smoothness and fluctuation range of the curve. If the current curve is smooth and the fluctuation range is small, it indicates that the equipment is operating normally; If the curve shows severe fluctuations or sudden changes, it indicates that there may be a malfunction in the equipment.

3. Analyze based on load conditions

Compare the current value with the load situation of the conveyed material. If the current value is consistent with the trend of load changes, it indicates that the equipment is operating normally; If the current value does not match the load, it indicates that there may be an abnormality in the equipment.

4. Set alarm threshold

Set the upper and lower alarm thresholds for the current based on the rated current value of the device. When the current value exceeds the upper limit or falls below the lower limit, the system automatically sends an alarm signal to remind the operator to check the equipment in a timely manner.

5. Regular maintenance and inspection

Regularly maintain and inspect the pipe chain conveyor based on current monitoring data. Pay close attention to the wear and tear of vulnerable parts such as chains, discs, and bearings, and replace or repair them in a timely manner to avoid abnormal current caused by equipment failure.

3、 Current performance and treatment measures of common faults

1. Chain stuck or broken

-Current performance: Sudden increase or decrease in current value, or even interruption.

-Solution: Check the tension and wear of the chain, adjust or replace the chain in a timely manner.

2. Disc wear or detachment

-Current performance: The current value fluctuates violently and does not match the load changes.

-Solution: Check the wear of the disc and replace severely worn discs in a timely manner.

3. Bearing damage

-Current performance: The current value continues to increase, accompanied by abnormal noise.

-Solution: Check the lubrication and wear of the bearings, and replace damaged bearings in a timely manner.

4. Material blockage

-Current performance: The current value suddenly increases and remains constant.

-Solution: Check the conveying pipeline and discharge port, and remove any blocked materials.

5. Motor malfunction

-Current performance: Abnormal fluctuations or sudden interruptions in current values.

-Solution: Check the winding, wiring, and control circuit of the motor, and promptly repair or replace the motor.

4. Summary

By monitoring and analyzing the current changes of the chain conveyor motor, the operating status of the equipment can be effectively determined, and potential faults can be detected and dealt with in a timely manner. This method has the advantages of strong real-time performance, easy operation, and low cost, and is suitable for various scales of pipe chain conveyor equipment. In practical applications, it is recommended to combine other monitoring methods (such as vibration monitoring, temperature monitoring, etc.) for comprehensive judgment to improve the accuracy and reliability of fault diagnosis. At the same time, regular maintenance and upkeep of equipment are also important measures to ensure the long-term stable operation of the pipe chain conveyor.