Automatic temperature measuring system for water ring pump motor

Abstract

The invention belongs to the technical field of water ring pump motors, and particularly relates to an automatic temperature measurement system for a water ring pump motor, which adopts 4Cr13 martensitic stainless steel as a lining plate base material and comprises a water ring pump motor, a PLC (programmable logic controller) system and an HMI (human-machine interaction) interface. The water ring pump motor is provided with a motor winding temperature detection thermocouple and a motor shaft temperature detection thermocouple, and the signal output ends of the two thermocouples are electrically connected with the signal input end of the PLC system. The PLC system receives and processes the temperature signals transmitted by the two thermocouples and then transmits a processing result to the HMI, and the HMI displays corresponding temperature data in real time. Through the linkage structure, the state of the RH furnace water ring pump motor can be monitored in real time, temperature abnormity can be captured in time, the motor fault can be warned in advance, and the occurrence of fault shutdown can be effectively reduced. The technical problems that existing temperature measurement is lagged, large in error, prone to interference and the like, and the requirement for high reliability of an RH furnace vacuum system is difficult to meet are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water ring pump motors, and specifically relates to an automatic temperature measuring system for a water ring pump motor. BACKGROUND

[0002] As a key refining equipment for steel smelting, the stability of the vacuum system of an RH furnace directly determines the quality of molten steel and production efficiency, and the running state of the supporting motor of the water ring pump, as the core power equipment of the system, is crucial; the water ring pump motor is long-term operated under the working conditions of high load, high temperature and strong magnetic field, and temperature abnormalities are easily caused by aging of winding insulation, wear of motor shaft bearings and the like, and if not handled in time, the motor will be burned out, the vacuum system will be paralyzed, the production line will be stopped and huge losses will be caused, and the "sub-health operation" of the motor will greatly shorten the service life, therefore, accurate real-time temperature measurement of the motor is the key to guaranteeing the stable operation of the RH furnace. At present, motor temperature measurement in the industrial field mainly has two types of contact type and non-contact type: the contact type needs complicated cable laying, wiring and programming configuration, and the sensor is inconvenient to replace when it fails; the non-contact type can only detect the surface temperature of the motor and cannot obtain the temperature data of the core part, and is easily disturbed by the environment; some RH furnace water ring pump motors are provided with winding and motor shaft temperature detection thermocouples when they are shipped, but the existing technology does not form a suitable systematic monitoring scheme, the detection signal is not effectively utilized, and temperature data centralized processing and visual display cannot be realized. The traditional temperature measurement also has problems of hysteresis, large error, easy disturbance and the like, and it is difficult to meet the high reliability requirement of the vacuum system of the RH furnace; therefore, how to fully utilize the detection thermocouples of the motor, design an automatic temperature measuring system with simple structure and strong adaptability, solve the pain points of the existing technology, realize real-time monitoring and visualization of the motor temperature, and find abnormalities in advance has become a technical requirement to be solved in industrial production, and the requirement can be extended to various motors with detection thermocouples, and has wide application value. SUMMARY

[0003] The technical problem to be solved by the application is that the existing temperature measurement has problems of hysteresis, large error, easy disturbance and the like, and it is difficult to meet the high reliability requirement of the vacuum system of the RH furnace.

[0004] To achieve the above object, the application provides the following technical scheme: The temperature monitoring system comprises a water ring pump motor, a PLC system and an HMI man-machine interface, the water ring pump motor is provided with a motor winding temperature detection thermocouple and a motor shaft temperature detection thermocouple, a signal output end of the motor winding temperature detection thermocouple is electrically connected with a signal input end of the PLC system, a signal output end of the motor shaft temperature detection thermocouple is electrically connected with a signal input end of the PLC system, a signal output end of the PLC system is electrically connected with a signal input end of the HMI man-machine interface, the PLC system receives temperature signals transmitted by the motor winding temperature detection thermocouple and the motor shaft temperature detection thermocouple and processes the temperature signals, and the HMI man-machine interface displays motor winding temperature data and motor shaft temperature data processed in real time, so that the RH water ring pump motor state can be monitored in real time, motor abnormalities can be found in advance, and faults can be reduced.

[0005] Further scheme: the motor winding temperature detection thermocouple is a K-type thermocouple.

[0006] Further scheme: the motor shaft temperature detection thermocouple is an armored thermocouple.

[0007] Further scheme: the PLC system is provided with a temperature signal acquisition module for acquiring analog signals transmitted by the motor winding temperature detection thermocouple and the motor shaft temperature detection thermocouple.

[0008] Further scheme: the HMI man-machine interface is further provided with a temperature abnormality alarm module, which alarms when the temperature data exceeds a preset threshold.

[0009] Further scheme: the temperature abnormality alarm module comprises an audible and visual alarm.

[0010] Further scheme: the temperature monitoring system is suitable for motor temperature detection of various motors provided with detection thermocouples.

[0011] The beneficial effects of the present application are: 1. The motor is provided with detection thermocouples, no additional sensors are needed, the system structure is simplified, the installation and maintenance costs are reduced, and the problem of complicated wiring and modification of traditional contact type temperature measurement is solved. 2. The temperature signals of the motor winding and the motor shaft core part are collected at the same time, the temperature measurement precision is high, the limitation that the surface temperature can only be detected by the non-contact type temperature measurement is overcome, and the motor running state can be comprehensively reflected. 3. The signals are processed by the PLC system, and the HMI interface displays in real time, so that the temperature data visualization and real-time monitoring are realized, the problems of scattered traditional temperature measurement data and feedback lag are solved, and the equipment state can be grasped by the operator in time. BRIEF DESCRIPTION OF DRAWINGS

[0012] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 System flow diagram of an automatic temperature measurement system for a water ring pump motor Figure 1 ; Figure 2 System flow diagram of an automatic temperature measurement system for a water ring pump motor Figure 2 ; Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments.

[0015] This invention provides a technical solution to address the existing problems mentioned in the background section.

[0016] Combined with appendix Figures 1-2 A RH boiler water ring pump motor with built-in motor winding temperature sensing thermocouples and motor shaft temperature sensing thermocouples was selected. The motor winding temperature sensing thermocouples were K-type thermocouples, and the motor shaft temperature sensing thermocouples were armored thermocouples. The signal output terminal of the K-type thermocouple was electrically connected to the signal input terminal of the PLC system via a wire, and the signal output terminal of the armored thermocouple was also electrically connected to the signal input terminal of the PLC system via a wire, ensuring a secure and good contact. The PLC system has a built-in temperature signal acquisition module. Then, the signal output terminal of the PLC system was electrically connected to the signal input terminal of the HMI (Human-Machine Interface) via a wire. Normal temperature thresholds for the motor windings and motor shaft were preset in the HMI, and a temperature anomaly alarm module, including an audible and visual alarm, was integrated into the HMI. After completing the connection and debugging of the above components, the automatic temperature measurement system for the water ring pump motor could be started. This temperature monitoring system is also suitable for various motor temperature detection scenarios with built-in sensing thermocouples.

[0017] Working Principle: After the system starts, during the operation of the water ring pump motor, its built-in K-type motor winding temperature detection thermocouple and armored motor shaft temperature detection thermocouple collect temperature signals from the corresponding parts in real time. The collected analog temperature signals are then transmitted to the PLC system. The PLC system receives these analog temperature signals through its built-in temperature signal acquisition module, converts and processes them to obtain accurate motor winding temperature data and motor shaft temperature data. The PLC system then transmits the processed temperature data to the HMI (Human-Machine Interface), which displays the temperature data in real time, enabling real-time monitoring of the RH boiler water ring pump motor status. When the temperature data displayed on the HMI exceeds the preset normal threshold, the integrated temperature anomaly alarm module immediately triggers an alarm, promptly alerting the operator to the motor temperature anomaly. This allows operators to detect motor abnormalities early and handle them promptly, reducing the occurrence of faults and ensuring the stable operation of the RH boiler vacuum system.

[0018] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. An automatic temperature measurement system for a water ring pump motor, characterized in that: The temperature monitoring system comprises a water ring pump motor, a PLC system and an HMI man-machine interface, the water ring pump motor is provided with a motor winding temperature detection thermocouple and a motor shaft temperature detection thermocouple, a signal output end of the motor winding temperature detection thermocouple is electrically connected with a signal input end of the PLC system, a signal output end of the motor shaft temperature detection thermocouple is electrically connected with a signal input end of the PLC system, a signal output end of the PLC system is electrically connected with a signal input end of the HMI man-machine interface, the PLC system receives temperature signals transmitted by the motor winding temperature detection thermocouple and the motor shaft temperature detection thermocouple and processes the temperature signals, and the HMI man-machine interface displays motor winding temperature data and motor shaft temperature data processed in real time, so that the RH furnace water ring pump motor state can be monitored in real time, motor abnormalities can be found in advance, and faults can be reduced.

2. The automatic temperature measuring system of a water ring pump motor according to claim 1, characterized in that: The motor winding temperature detection thermocouple is a K-type thermocouple.

3. The automatic temperature measuring system of a water ring pump motor according to claim 1, characterized in that: The motor shaft temperature detection thermocouple is an armored thermocouple.

4. The automatic temperature measuring system of a water ring pump motor according to claim 1, characterized in that: The PLC system is provided with a temperature signal acquisition module for acquiring analog signals transmitted by the motor winding temperature detection thermocouple and the motor shaft temperature detection thermocouple.

5. The automatic temperature measuring system of a water ring pump motor according to claim 1, characterized in that: The HMI man-machine interface is further provided with a temperature abnormality alarm module for alarming when temperature data exceeds a preset threshold.

6. The automatic temperature measuring system of a water ring pump motor according to claim 5, characterized in that: The temperature abnormality alarm module comprises an audible and visual alarm.

7. The automatic temperature measuring system of a water ring pump motor according to any one of claims 1-6, characterized in that: The temperature monitoring system is suitable for temperature detection of various motors provided with detection thermocouples.

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