Intelligent supervision system for centrifugal fan of environmental protection facility

Abstract

The utility model discloses an intelligent supervision system for a centrifugal fan of an environmental protection facility. The intelligent supervision system comprises the centrifugal fan, a monitoring unit, an electric control system and a monitoring system. The monitoring unit comprises an air speed and air volume sensor, an air pressure sensor, a noise sensor, a motor vibration temperature sensor, a bearing vibration temperature sensor and an oil level sensor. The electric control system comprises a fan control cabinet, an HMI touch screen and a PLC. The monitoring system is installed on one side of the centrifugal fan and comprises a monitoring rod, a monitoring camera and an audible and visual alarm. According to the scheme, the running state and the running environment of the centrifugal fan can be monitored. When the fan operation parameters exceed the set early warning value, the system automatically judges the early warning level and makes different early warning responses, the false alarm rate is reduced by setting multi-level early warning, the situation that enterprise production is affected by false alarm is avoided, efficient, intelligent and accurate management and control over environmental protection facilities are achieved, and human resource investment of enterprises in the aspect of operation and maintenance of the environmental protection facilities is reduced.

Description

Technical Field

[0001] This utility model relates to the field of intelligent monitoring technology for wind turbines, and in particular to an intelligent monitoring system for centrifugal fans used in environmental protection facilities. Background Technology

[0002] With increasing environmental awareness, centrifugal fans are widely used in enterprise waste gas treatment and play a crucial role in this process. These fans are typically started before production equipment begins operation and shut down after it stops. Therefore, if a fan malfunctions and fails to function properly, it can lead to production stoppages, disrupting production schedules and, in severe cases, threatening the lives and property of the company and its employees. Furthermore, the effectiveness of waste gas collection is closely related to the frequency of fan operation.

[0003] Traditional centrifugal fans are often operated manually based on experience, lacking a scientific basis. Too low a frequency results in insufficient waste gas collection, while too high a frequency leads to energy waste. Fan inspections are also performed manually on a regular basis. High inspection frequency wastes manpower, while low inspection frequency may fail to detect faults in time, leading to poor fan operation or even damage.

[0004] The invention patent with publication number CN.115126710.A, entitled "An Energy-Saving Intelligent Fan," describes a device that acquires real-time data on the fan's operation through a monitoring component fixedly mounted on the fan. It analyzes the monitoring data to determine if the fan is malfunctioning and the cause of the malfunction, and then issues an alarm or automatically shuts down the fan. While this device has some application value, it suffers from the following problems:

[0005] (1) The fan body and the PLC controller are fixed on the same base plate. The vibration of the fan body during operation will be transmitted to the PLC controller through the base plate. Long-term vibration can easily cause the circuit on the PLC controller to fall off or even affect the service life of the PLC controller.

[0006] (2) The monitoring of the fan operation status is not perfect. For example, the noise of the fan during operation and the level of lubricating oil in the bearing box are not collected. Noise and oil level can more intuitively reflect whether the fan is abnormal.

[0007] (3) For the collection of environmental waste gas, the waste gas collection system is required to be in a negative pressure state. The wind pressure of the waste gas collection system is related to the operating frequency of the fan. This patent does not have the technology related to the linkage between wind pressure and frequency, and the intelligent control is insufficient. Utility Model Content

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this utility model provides an intelligent monitoring system for centrifugal fans in environmental protection facilities. It solves the problems of high manpower consumption, low inspection and maintenance efficiency, low visualization of existing intelligent fan operation data, high false alarm rate, and insufficient level of intelligence in traditional manual inspection methods for centrifugal fans.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] An intelligent monitoring system for centrifugal fans in environmental protection facilities includes a centrifugal fan, a monitoring unit, an electrical control system, and a monitoring system; the monitoring unit includes a wind speed and air volume sensor, a wind pressure sensor, a noise sensor, a motor vibration and temperature sensor, a bearing vibration and temperature sensor, and an oil level sensor.

[0013] The electrical control system includes a fan control cabinet, an HMI touch screen, and a PLC controller;

[0014] The monitoring system is installed on one side of the centrifugal fan and includes a monitoring pole, a monitoring camera, and an audible and visual alarm. The monitoring camera and the audible and visual alarm are fixed to the upper part of the monitoring pole with bolts.

[0015] Furthermore, the wind speed and air volume sensor is installed at the air outlet of the centrifugal fan via a threaded connection to monitor the wind speed and air volume at the air outlet of the centrifugal fan in real time.

[0016] Furthermore, the motor vibration temperature sensor is magnetically fixed on the motor of the centrifugal fan to monitor the vibration amplitude and temperature value of the motor in real time when the fan is running.

[0017] Furthermore, the bearing vibration temperature sensor is magnetically fixed on the bearing housing of the centrifugal fan to monitor the vibration amplitude and temperature value of the bearing housing in real time during fan operation.

[0018] Furthermore, the oil level sensor is installed on the oil filling hole of the bearing housing of the centrifugal fan via a threaded connection to monitor the level of lubricating oil in the bearing housing in real time during fan operation.

[0019] Furthermore, the wind pressure sensor is fixedly installed on the air inlet of the centrifugal fan by bolts to monitor the wind pressure of the incoming air when the fan is running in real time. The wind pressure sensor is linked with the fan frequency converter through a PLC controller to control the fan operating frequency according to the wind pressure.

[0020] Furthermore, the noise sensor is bolted to the support frame of the centrifugal fan to monitor the noise level of the fan in real time.

[0021] Furthermore, the fan control cabinet is mounted on a control cabinet base, which is then fixed to the ground using expansion bolts.

[0022] Furthermore, the HMI touch screen is fixedly installed on the outside of the fan control cabinet door with bolts, and the PLC controller is fixedly installed inside the fan control cabinet with bolts.

[0023] Furthermore, the fan control cabinet is also equipped with voltage transformers, current transformers, electricity meters, and fan frequency converters.

[0024] Furthermore, the electricity meter is fixedly installed on the guide rail inside the fan control cabinet by clips, and the voltage transformer, current transformer, electricity meter and fan frequency converter are fixedly installed inside the fan control cabinet by bolts.

[0025] Furthermore, the monitoring pole is fixed to the ground using expansion bolts.

[0026] Furthermore, the electrical control system and monitoring system can simultaneously receive operating data from multiple centrifugal fans and transmit the operating data to the central control platform in the plant or park. The central control platform then sends the operating information to the regulatory authorities.

[0027] (III) Beneficial Effects

[0028] This invention provides an intelligent monitoring system for centrifugal fans in environmental protection facilities. It has the following beneficial effects:

[0029] (1) Display all the operating data of the wind turbine on the touch screen and set up a monitoring system so that users can observe the operating status and operating environment of the wind turbine more clearly and intuitively.

[0030] (2) By setting multi-level early warning for the operating status parameters of the fan, the corresponding early warning response is triggered when the operating data exceeds the limit of different levels, thereby reducing the false alarm rate and avoiding the impact of false alarms on enterprise production. At the same time, it solves the problems of high human resource consumption and low inspection and maintenance efficiency of traditional centrifugal fan manual inspection method.

[0031] (3) By linking the fan inlet pressure sensor with the fan frequency converter, the fan frequency is automatically adjusted according to the inlet pressure to avoid insufficient collection of exhaust gas and exhaust gas leakage caused by the fan operating frequency being too low, while also avoiding energy waste caused by the fan operating frequency being too high.

[0032] (4) This solution helps parks, operation and maintenance units and government users to remotely monitor environmental protection facilities within their jurisdiction, and helps to achieve efficient, intelligent and precise management and control of enterprise environmental protection facilities. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the intelligent monitoring system of this utility model;

[0034] Figure 2 This is a schematic diagram of the centrifugal fan structure of this utility model;

[0035] Figure 3 This is a schematic diagram of the structure of the fan control cabinet of this utility model;

[0036] Figure 4 This is a schematic diagram of the intelligent monitoring system of this utility model;

[0037] Figure 5 This is a flowchart of the early warning process for the intelligent monitoring system of this utility model.

[0038] In the diagram: 1. Wind speed and air volume sensor; 2. Centrifugal fan; 3. Motor vibration and temperature sensor; 4. Motor; 5. HMI touch screen; 6. Fan control cabinet; 7. Monitoring pole; 8. Monitoring camera; 9. Bearing housing; 10. Bearing vibration and temperature sensor; 11. Wind pressure sensor; 12. PLC controller; 13. Voltage transformer; 14. Current transformer; 15. Electricity meter; 16. Fan frequency converter; 17. Noise sensor; 18. Support frame; 19. Control cabinet base; 20. Oil level sensor; 21. Base; 22. Air inlet; 101. Data acquisition module; 102. Data processing module; 103. Early warning module; 104. Audible and visual alarm; 105. Data storage module; 106. Communication module; 107. User terminal display screen. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0040] like Figure 1 As shown, an intelligent monitoring system for centrifugal fans in environmental protection facilities includes a centrifugal fan body, a monitoring unit, an electrical control system, and a monitoring system.

[0041] The base 21 of the centrifugal fan 2 is fixed to the ground by expansion bolts. The support frame 18 is fixed to the base 21 by welding. The bearing box 9 is fixed to the support frame 18 by bolt connection. The centrifugal fan 2 is fixed to the base 21 by welding. The motor 4 is fixed to the base 21 by bolt connection.

[0042] The monitoring unit includes a wind speed and air volume sensor 1 fixedly installed at the air outlet of the centrifugal fan 2 via a threaded connection, a wind pressure sensor 11 fixedly installed at the air inlet 22 of the centrifugal fan 2 via a bolt connection, a noise sensor 17 fixedly installed on the side of the support frame 18 via a bolt connection, a motor vibration and temperature sensor 3 fixedly installed on the motor 4 via a magnetic attraction, a bearing vibration and temperature sensor 10 fixedly installed on the bearing housing 9 via a magnetic attraction, and an oil level sensor 20 fixedly installed on the oil filling hole of the bearing housing 9 via a threaded connection.

[0043] The electrical control system includes a control cabinet base 19 fixed to the ground by expansion bolts, a fan control cabinet 6 fixed to the control cabinet base 19 by bolts, an HMI touch screen 5 fixed to the door of the fan control cabinet 6 by bolts, a PLC controller 12 fixed to the internal cabinet of the fan control cabinet 6 by bolts, an electric meter 15 fixed to the internal guide rail of the fan control cabinet 6 by clips, a fan frequency converter 16 fixed to the inside of the fan control cabinet 6 by bolts, and a voltage transformer 13 and a current transformer 14 fixed to the inside of the fan control cabinet 6 by bolts.

[0044] The monitoring system includes a monitoring pole 7 fixed to the ground by expansion bolts and a monitoring camera 8 fixed to the top of the monitoring pole 7 by bolts.

[0045] Working principle: During use, the monitoring unit on the main body of the wind turbine transmits the collected wind turbine operating parameters to the PLC controller 12. The data acquisition module 101 collects the data. After receiving the feedback data, the PLC controller 12 integrates the data by the data processing module 102. The data is then analyzed and compared with the pre-set warning values. The data is processed into a visual result chart and sent to the user terminal display screen 107 and the on-site HMI touch screen 5 through the communication module 106. If the data is abnormal, the warning module 104 is triggered.

[0046] If the data exceeds the Level 3 warning threshold, it indicates that the equipment is operating normally but certain functions or components require maintenance, such as communication failure. The system triggers a yellow warning and sends the warning information to the user terminal display screen 107 and the on-site HMI touch screen 5 via a pop-up window. If the data exceeds the Level 2 warning threshold, it indicates that the equipment has a minor fault that does not affect normal use but urgently needs repair, such as low bearing lubricating oil level. The system triggers an orange warning and sends the warning information to the user terminal display screen 107 and the on-site HMI touch screen 5 via a pop-up window, while the audible and visual alarm 104 alarms intermittently. If the data exceeds the Level 3 warning threshold, it indicates that the equipment has a serious fault and must be stopped immediately for repair and maintenance, such as abnormal bearing vibration. The system triggers a red warning and sends the warning information to the user terminal display screen 107 and the on-site HMI touch screen 5 via a pop-up window, while the audible and visual alarm 104 alarms continuously. The data storage module 105 records the wind turbine's historical operating data and historical warning information, which can be viewed by staff at any time.

[0047] To ensure that the exhaust gas collection system is always under negative pressure, the wind pressure sensor 11 at the fan inlet 22 is linked to the fan frequency converter 16 through the PLC controller 12. When the wind pressure is lower than the set lower limit, the fan frequency automatically increases; when the wind pressure is higher than the set upper limit, the fan frequency automatically decreases. This avoids insufficient exhaust gas collection and exhaust gas leakage due to the fan operating frequency being too low, and energy waste due to the fan operating frequency being too high.

[0048] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. An intelligent monitoring system for centrifugal fans in environmental protection facilities, characterized in that: Includes centrifugal fan (2), monitoring unit, electrical control system, and monitoring system; The monitoring unit includes a wind speed and air volume sensor (1), a wind pressure sensor (11), a noise sensor (17), a motor vibration and temperature sensor (3), a bearing vibration and temperature sensor (10), and an oil level sensor (27). The wind speed and air volume sensor (1) is installed at the air outlet of the centrifugal fan (2) by a threaded connection. The wind pressure sensor (11) is fixedly installed on the air inlet (22) of the centrifugal fan (2) by bolts. The noise sensor (17) is fixedly installed on the support frame (18) of the centrifugal fan (2) by bolts. The motor vibration and temperature sensor (3) is fixedly installed on the motor (4) of the centrifugal fan (2) by magnetic attraction. The bearing vibration and temperature sensor (10) is fixedly installed on the bearing box (9) of the centrifugal fan (2) by magnetic attraction. The oil level sensor (27) is installed on the oil filling hole of the bearing box (9) of the centrifugal fan (2) by a threaded connection. The electrical control system includes a fan control cabinet (6), an HMI touch screen (5), and a PLC controller (12); The monitoring system is installed on one side of the centrifugal fan (2) and includes a monitoring pole (7), a monitoring camera (8) and an audible and visual alarm (23). The monitoring camera (8) and the audible and visual alarm (23) are fixedly installed on the upper part of the monitoring pole (7) by bolts.

2. The intelligent monitoring system for centrifugal fans in environmental protection facilities according to claim 1, characterized in that, The fan control cabinet (6) is mounted on the control cabinet base (19), and the control cabinet base (19) is fixed to the ground by expansion bolts.

3. The intelligent monitoring system for centrifugal fans in environmental protection facilities according to claim 1, characterized in that, The HMI touch screen (5) is fixedly installed on the outside of the fan control cabinet (6) by bolts, and the PLC controller (12) is fixedly installed inside the fan control cabinet (6) by bolts.

4. The intelligent monitoring system for centrifugal fans in environmental protection facilities according to claim 3, characterized in that, The fan control cabinet (6) is also equipped with a voltage transformer (13), a current transformer (14), an electricity meter (15), and a fan frequency converter (16).

5. The intelligent monitoring system for centrifugal fans in environmental protection facilities according to claim 4, characterized in that, The meter (15) is fixedly installed on the guide rail inside the fan control cabinet (6) by a buckle. The voltage transformer (13), current transformer (14), meter (15) and fan frequency converter (16) are fixedly installed inside the fan control cabinet (6) by bolts.

6. The intelligent monitoring system for centrifugal fans in environmental protection facilities according to claim 1, characterized in that, The monitoring pole (7) is fixedly installed on the ground by expansion bolts.

Images