Monitoring system and method for chain type transmission mud scraper

Abstract

The invention relates to a monitoring system for a chain type transmission mud scraper. The system is characterized in that the monitoring system comprises a to-be-detected module positioned on the outer surface of a suspension shaft, a sensor used for sensing a to-be-detected module, a time-delay relay, a PLC and an HMI; the suspension shaft can rotate relative to the sensor, and the sensor outputs a sensing signal when sensing the to-be-detected module; a control loop of the time-delay relay is connected with the signal output end of the sensor; the PLC is connected with the time-delay relay; and the HMI is in communication connection with the PLC. The invention further discloses a monitoring method using the monitoring system for the chain type transmission mud scraper. The monitoring system is high in automatic monitoring accuracy and capable of finding out the abnormal rotation condition of the suspension shaft in time.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a monitoring system and a monitoring method for a chain-type transmission mud scraper. Background technique [0002] The wastewater treatment station needs to use a sludge clarifier to separate sludge and wastewater during the wastewater treatment process. The most important equipment in sludge clarification is the sludge scraper, also known as mud rake, which is used to prevent sludge sedimentation and help sludge transportation. In modern times, the most widely used in the sewage treatment industry is also the central suspension drive chain drive type mud scraper. The conventional structure of this type of mud scraper is the driving device installed on the working bridge. The gear is driven by the motor, the running speed of the mud rake is changed through the gear ratio, and the torque of the mud rake is increased. The chain drive drives the worm gear, and the worm g...

AI Technical Summary

Problems solved by technology

[0003] However, the following two types of problems are prone to occur in this type of equipment driven by chains at present: 1. When the chain falls off or breaks, the drive motor will continue to rotate, and the actually driven mud rake has stopped working. In the HMI screen It still shows that the mud rake drive motor is running normally. In the current industrial automation factory, the automatic efficiency is high. The operator can directly operate and monitor the field equipment through the HMI in the operating room.

Generally, the operator will go to the site to confirm the site conditions of the equipment only when the equipment reports a failure in the HMI; 2. The suspension shaft rotates too slowly due to too many sludge deposits deposited at the bottom of the tank

For such low-speed and low-speed equipment on site, it is often difficult to find the abnormal rotation of the suspension shaft in time during daily inspections. The rotation speed of the mud rake is very slow. Generally, it takes 6 to 10 minutes to make a circle. The torque of the high-speed rotating equipment is very large. Once it stops, the mud at the bottom will sink and agglomerate. After a long time, the mud will stop and it will be difficult to open the mud rake again. If the torque is too high, it will easily damage the mud rake body. It can only clear the pond and mud, which will increase the downtime, and the workload will be very large, which will waste a lot of manpower and material resources

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