A fault detection device for a mine frequency converter

Abstract

The utility model provides a fault detection device for a mine frequency converter, comprising a frequency converter, a sampling unit and a controller; the frequency converter comprises a frequency converter cabinet, and a circuit device and a motion device are arranged in the frequency converter cabinet; the sampling unit is used to obtain the operation information of the frequency converter, and the sampling unit comprises a temperature information sensing module, a vibration information sensing module, a power information sensing module and a sound information sensing module, and the sampling unit is communicatively connected to the controller; the controller is used to analyze and process the operation information obtained by the sampling unit. The utility model speeds up the fault detection speed, so as to timely discover signal abnormalities and improve the detection accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of frequency conversion control and relates to a fault detection device for a mine frequency converter. Background Art

[0002] The stability of the frequency conversion control system affects the operating performance of the entire system in the entire mine. If the frequency conversion control system can detect, identify and troubleshoot faults in a timely manner, it is of great significance to stabilize the operating status of the system and reduce maintenance costs. The frequency conversion control system is mainly composed of frequency converters, PLC controllers (Programmable Logic Controllers), motors and other components. Failures of the hoist frequency conversion control system usually occur in its components, and common ones are frequency converter failures and motor failures. During the operation of the mine, the frequency converter provides reliable and accurate speed modulation for the motor, ensuring that the system can work smoothly. Carrying out fault detection of mine frequency converters plays a vital role in ensuring the safe and efficient operation of the mine system.

[0003] Mining inverters are widely used in the mining industry. As a key device for controlling the speed of electric motors, they can help mining companies improve production efficiency and reduce energy consumption. However, as the use time increases, mining inverters will also have various faults, affecting the normal production. The complexity of the inverter failure mechanism leads to the diversity of inverter failure problems, which requires specific analysis and solutions for different causes of failure. The manifestations of inverter failures are also diverse, which may manifest as unstable output power, frequency offset, current imbalance, high operating noise, etc.

[0004] However, the current fault diagnosis system is not accurate enough. The traditional fault diagnosis method mainly relies on experience and professional knowledge to determine the cause of the fault. This method has problems such as strong subjectivity and being easily limited by people's experience and level, and its performance needs to be improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a fault detection device for a mining inverter, which performs fault detection on different parts of the mining inverter based on signal processing, so as to achieve rapid and accurate fault diagnosis of the inverter, and timely discover and eliminate faults.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a fault detection device for a mine frequency converter, the fault detection device for a mine frequency converter comprises a frequency converter, a sampling unit and a controller; the frequency converter comprises a frequency converter cabinet, and circuit devices and motion devices are arranged in the frequency converter cabinet; the sampling unit is used to obtain the operation information of the frequency converter, the sampling unit comprises a temperature information sensor module, a vibration information sensor module, an electric power information sensor module and an acoustic information sensor module, and the sampling unit is communicatively connected to the controller; the controller is used to analyze and process the operation information obtained by the sampling unit.

[0008] The fault detection device of the mining frequency converter of the utility model realizes fault detection and diagnosis based on the acquisition of the frequency converter fault signal and utilizes the controller for analysis and processing, thereby accelerating the speed of fault detection, timely discovering and diagnosing signal abnormalities, and improving the detection accuracy so as to take targeted maintenance and repairs, thereby minimizing the impact of faults on production, reducing the occurrence rate of faults, extending the service life of equipment, and being conducive to improving production efficiency.

[0009] As a preferred technical solution of the present utility model, the temperature information sensing module includes a plurality of infrared radiation detection components, at least one of which is arranged inside the inverter cabinet to obtain the temperature information of the circuit devices and the moving devices; at least one of which is arranged on the outer wall of the inverter cabinet to obtain the temperature information in the external environment and transmit it to the controller.

[0010] The utility model adopts an infrared radiation detection component to monitor the temperature information inside the inverter cabinet, timely discovers the heat accumulation of the circuit components inside the equipment, and prevents failures caused by excessive temperature. At the same time, it monitors the temperature information in the external environment to avoid the high temperature working environment from affecting normal operation and worker safety.

[0011] As a preferred technical solution of the present utility model, the temperature information sensing module includes at least two infrared thermal imaging cameras, at least one of which is arranged on the inner cavity wall of the inverter cabinet to obtain the temperature distribution image information inside the inverter cabinet, and at least one of which is arranged on the outer peripheral wall of the inverter cabinet to obtain the temperature distribution image information in the external environment and transmit it to the controller.

[0012] As a preferred technical solution of the utility model, the vibration information sensing module includes a plurality of vibration sensing components distributed in a multi-point manner, wherein the plurality of vibration sensing components are distributed at two points along the axial direction, vertical radial direction and horizontal radial direction of the moving device, respectively. The vibration sensing components are used to obtain the vibration signal of the moving device and transmit it to the controller.

[0013] The utility model reflects the vibration condition of the moving device in the frequency converter based on the collected vibration signal, and judges whether the moving device has abnormal wear or failure through the frequency and amplitude of the vibration signal.

[0014] As a preferred technical solution of the utility model, the vibration sensor component is an intrinsically safe explosion-proof vibration sensor.

[0015] As a preferred technical solution of the utility model, the power information sensing module includes an electric energy metering chip, a plurality of voltage mutual inductance components and a plurality of current mutual inductance components; the voltage mutual inductance components are used to obtain the voltage information of the main circuit in the circuit device and transmit it to the electric energy metering chip; the current mutual inductance components are used to obtain the current information of the main circuit in the circuit device and transmit it to the electric energy metering chip; the electric energy metering chip is communicatively connected to the controller, used to analyze and process the voltage information and the current information, generate a power fault signal, and transmit it to the controller.

[0016] The current signal in the utility model can reflect the working state of the circuit device. By monitoring the current signal of the circuit device, it can be determined whether the circuit device has problems such as overload and short circuit. In addition, the voltage signal can reflect the working state of the power supply of the circuit device. By monitoring the voltage signal of the input and output ends, it can be determined whether the power supply is stable, thereby realizing electrical fault detection.

[0017] As a preferred technical solution of the utility model, the acoustic information sensing module includes a plurality of acoustic sensing components, and the plurality of acoustic sensing components are distributed inside and outside the inverter cabinet. The acoustic sensing components are used to obtain fault acoustic signals and transmit them to the controller.

[0018] The utility model detects mechanical faults of mining inverters based on fault sound signals. Abnormal noise, friction or vibration sounds are often signs of mechanical failures. Workers can monitor and analyze the sound signals of the inverter in real time through the sound sensor component to determine the working status of the mechanical parts.

[0019] As a preferred technical solution of the utility model, the acoustic sensor component includes a filter module, a micro-signal amplification module and a data conversion chip connected in sequence. The filter module is used to filter the acoustic signal inside or outside the inverter cabinet, the micro-signal amplification module is used to amplify the acoustic signal after filtering, and the data conversion chip is used to calculate and perform analog-to-digital conversion on the acoustic signal after amplification to obtain a fault acoustic signal, and transmit it to the controller.

[0020] As a preferred technical solution of the utility model, the frequency converter, sampling unit and controller communicate and interact through the Ethernet local area network. The controller of the utility model serves as a terminal for staff to operate and monitor, and establishes a complete communication network in the entire inspection area through Ethernet to achieve two-way data interaction.

[0021] As a preferred technical solution of the present utility model, a display module is provided on the controller.

[0022] The display module in the utility model is used to display the status information related to the inverter and the analysis results of various types of data, so that the staff can obtain the operating parameters of the inverter in real time, understand and grasp the production situation in time, and quickly make fault diagnosis to reduce losses.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model provides a fault detection device for a mining frequency converter. Based on the acquisition of frequency converter fault signals, the device uses a controller for analysis and processing to achieve fault detection and diagnosis, thereby accelerating the speed of fault detection, timely discovering and diagnosing signal anomalies, and improving detection accuracy so as to take targeted maintenance and repairs. This can minimize the impact of faults on production, reduce the occurrence rate of faults, extend the service life of equipment, and help improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a structural block diagram of a fault detection device for a mining frequency converter provided in a specific embodiment of the present invention.

[0026] Among them, 1- inverter; 101- circuit device; 102- motion device; 2- sampling unit; 201- temperature information sensor module; 2011- infrared radiation detection component; 2012- infrared thermal imaging camera; 202- vibration information sensor module; 2021- vibration sensor component; 203- power information sensor module; 2031- power metering chip; 2032- voltage mutual inductance component; 2033- current mutual inductance component; 204- acoustic information sensor module; 2041- acoustic sensor component; 3- controller; 301- display module. DETAILED DESCRIPTION

[0027] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] The utility model provides a fault detection device for a mine frequency converter, such as Figure 1 As shown, it includes a frequency converter 1, a sampling unit 2 and a controller 3. The frequency converter 1 includes a frequency converter cabinet, and a circuit device 101 and a motion device 102 are arranged in the frequency converter cabinet. The sampling unit 2 is used to obtain the operation information of the frequency converter, and the sampling unit 2 includes a temperature information sensor module 201, a vibration information sensor module 202, a power information sensor module 203 and an acoustic information sensor module 204. The sampling unit 2 is communicatively connected to the controller 3, and the controller 3 is used to analyze and process the operation information obtained by the sampling unit 2.

[0030] Specifically, the circuit device 101 includes but is not limited to the main circuit, filter module, inverter module and rectifier module etc. required by the inverter 1; the motion device 102 includes but is not limited to the motor, gears and other mechanical elements of the inverter 1.

[0031] In some embodiments, the temperature information sensing module 201 includes a plurality of infrared radiation detection components 2011, at least one of which is disposed inside the inverter cabinet, and is used to obtain the temperature information of the circuit device 101 and the motion device 102, and transmit it to the controller 3, so as to timely detect the heat accumulation of the circuit device 101 inside the device, and prevent malfunctions caused by excessive temperature. At least one of the infrared radiation detection components 2011 is disposed on the outer peripheral wall of the inverter cabinet, and is used to obtain the temperature information in the external environment, and transmit it to the controller 3, so as to prevent the high temperature working environment from affecting normal operation and the safety of workers.

[0032] Specifically, the infrared radiation used by the infrared radiation detection component 2011 of the utility model is an electromagnetic wave with a wavelength range of 0.75 to 1000 m. Based on the characteristic that any object with a temperature higher than absolute zero is always emitting electromagnetic radiation, and the higher the temperature, the greater the intensity of the infrared radiation, the utility model calculates the temperature of the object surface by observing the intensity of the infrared radiation to obtain temperature information.

[0033] In some embodiments, the temperature information sensing module 201 includes at least two infrared thermal imaging cameras 2012, at least one of which is disposed on the inner wall of the inverter cabinet to obtain image information of temperature distribution inside the inverter cabinet, and at least one of which is disposed on the outer wall of the inverter cabinet to obtain temperature information in the external environment and transmit it to the controller 3. The infrared thermal imaging camera 2012 of the utility model captures infrared rays and obtains infrared thermal images, which has the advantages of non-contact, easy operation, high safety, and wide detection range, and can simultaneously obtain the temperature distribution of the entire circuit.

[0034] In some embodiments, the vibration information sensing module includes a plurality of vibration sensing components 2021 distributed in a multi-point manner, wherein the plurality of vibration sensing components 2021 are distributed at two points along the axial direction, vertical radial direction, and horizontal radial direction of the moving device 102, and the vibration sensing components 2021 are used to obtain the vibration signal of the moving device 102 and transmit it to the controller 3. The utility model reflects the vibration condition of the moving device 102 in the inverter 1 based on the collected vibration signal, and determines whether the moving device 102 has abnormal wear or failure through the frequency and amplitude of the vibration signal.

[0035] Furthermore, the vibration sensor assembly 2021 is an intrinsically safe explosion-proof vibration sensor.

[0036] In some embodiments, the power information sensor module 203 includes an energy metering chip 2031, a plurality of voltage mutual inductance components 2032 and a plurality of current mutual inductance components 2033; the voltage mutual inductance component 2032 is used to obtain the voltage information of the main circuit in the circuit device 101 and transmit it to the energy metering chip 2031; the current mutual inductance component 2033 is used to obtain the current information of the main circuit in the circuit device 101 and transmit it to the energy metering chip 2031; the energy metering chip 2031 is communicatively connected to the controller 3, and is used to analyze and process the voltage information and the current information, generate a power fault signal, and transmit it to the controller 3. In the utility model, the current signal can reflect the working state of the circuit device 101. By monitoring the current signal of the circuit device 101, it can be determined whether the circuit device 101 has problems such as overload and short circuit. In addition, the voltage signal can reflect the working state of the power supply of the circuit device 101. By monitoring the voltage signal of the input and output terminals, it can be determined whether the power supply is stable, and electrical fault detection can be achieved. The electric energy metering chip 2031 can obtain the current and voltage synchronous sampling waveform data, active power, current effective value, voltage effective value, frequency and other data of the circuit device 101 under test in real time for fault diagnosis.

[0037] Furthermore, the current mutual inductance component 2033 and the voltage mutual inductance component 2032 respectively realize the acquisition of the current and voltage of the circuit device 101 under test, and the electrical isolation between the circuit device 101 under test and the measuring circuit, thereby improving safety and reliability. Specifically, the current mutual inductance component 2033 and the voltage mutual inductance component 2032 in the utility model are both current type, converting the sampled current into a suitable differential mode measurement voltage so that the ADC can convert it into a digital signal.

[0038] Furthermore, the electric energy metering chip 2031 adopts the HT7036 electric energy metering chip 2031, which can measure various types of power and energy of each phase and the combined phase, and can also measure various parameters of each phase current and voltage including waveform data, frequency, effective value, phase angle, etc.

[0039] In some embodiments, the acoustic information sensing module 204 includes a plurality of acoustic sensing components 2041, which are distributed inside and outside the inverter cabinet, and the acoustic sensing components 2041 are used to obtain fault sound signals and transmit them to the controller 3. In the utility model, the mechanical fault of the mining inverter 1 is detected based on the fault sound signal. Abnormal noise, friction or vibration is often a sign of mechanical failure. The staff can monitor and analyze the sound signal of the inverter 1 in real time through the acoustic sensing component 2041 to determine the working status of the mechanical parts.

[0040] Specifically, the acoustic sensor component 2041 includes a filter module, a micro-signal amplification module and a data conversion chip connected in sequence. The filter module is used to filter the acoustic signal inside or outside the inverter cabinet. Furthermore, the filter module adopts a second-order active filter in the form of a voltage-controlled voltage source filter as a basic filter unit to filter interference signals and noise. The micro-signal amplification module is used to amplify the acoustic signal after filtering. The data conversion chip is used to calculate and convert the acoustic signal after amplification to obtain a fault acoustic signal, and transmit it to the controller 3. The data conversion chip converts the analog acoustic signal into an anti-interference differential digital signal, which is convenient for the controller 3 to process.

[0041] In some embodiments, the inverter 1, sampling unit 2 and controller 3 communicate and interact via an Ethernet local area network. The controller 3 of the utility model serves as a terminal for staff to operate and monitor, and establishes a complete communication network in the entire inspection area via Ethernet to achieve two-way data interaction.

[0042] In some embodiments, a display module 301 is provided on the controller 3 for displaying status information related to the inverter 1 and analysis results of various types of data, so that the staff can obtain the operating parameters of the inverter 1 in real time, understand and grasp the production situation in time, and quickly make fault diagnosis to reduce losses.

[0043] The utility model can accurately and timely collect common fault types and corresponding fault diagnosis signals in mining inverters, including current, voltage, temperature, vibration, sound and other signals, and then analyze and diagnose the collected fault signals, as well as perform targeted maintenance and repair.

[0044] The applicant declares that the above is only a specific implementation method of the present utility model, but the protection scope of the present utility model is not limited thereto. The technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by the technicians in the relevant technical field within the technical scope disclosed in the present utility model fall within the protection scope and disclosure scope of the present utility model.

Claims

1. A fault detection device for a mine frequency converter, characterized in that: The fault detection device for the mine frequency converter comprises a frequency converter, a sampling unit and a controller; the frequency converter comprises a frequency converter cabinet, and a circuit device and a motion device are arranged in the frequency converter cabinet; the motion device comprises a motor; the sampling unit is used to obtain the operation information of the frequency converter, and the sampling unit comprises a temperature information sensing module, a vibration information sensing module, a power information sensing module and a sound information sensing module, and the temperature information sensing module, the vibration information sensing module, the power information sensing module and the sound information sensing module are respectively connected to the controller for communication, and the controller is used to analyze and process the operation information obtained by the sampling unit; The temperature information sensing module includes an infrared radiation detection component or an infrared thermal imaging camera at least arranged inside the inverter cabinet; the vibration information sensing module includes a plurality of vibration sensing components distributed in a multi-point manner on the moving device; the power information sensing module includes an electric energy metering chip, a plurality of voltage mutual inductance components and a plurality of current mutual inductance components, the voltage mutual inductance component is used to obtain the voltage information of the main circuit in the circuit device and transmit it to the electric energy metering chip, the current mutual inductance component is used to obtain the current information of the main circuit in the circuit device and transmit it to the electric energy metering chip, and the electric energy metering chip is communicatively connected to the controller; the sound information sensing module includes a sound sensing component at least arranged inside the inverter cabinet, which is used to obtain the fault sound signal of the moving device.

2. The fault detection device for a mining frequency converter according to claim 1, characterized in that: The temperature information sensing module includes a plurality of infrared radiation detection components, at least one of which is arranged inside the inverter cabinet to obtain the temperature information of the circuit components and the moving components; at least one of which is arranged on the outer wall of the inverter cabinet to obtain the temperature information in the external environment and transmit it to the controller.

3. The fault detection device for a mining frequency converter according to claim 1, characterized in that: The temperature information sensing module includes at least two infrared thermal imaging cameras, at least one of which is arranged on the inner cavity wall of the inverter cabinet to obtain the temperature distribution image information inside the inverter cabinet, and at least one of which is arranged on the outer peripheral wall of the inverter cabinet to obtain the temperature distribution image information in the external environment and transmit it to the controller.

4. The fault detection device for a mining frequency converter according to claim 1, characterized in that: A plurality of the vibration sensor components are distributed at two points along the axial direction, vertical radial direction and horizontal radial direction of the moving device, and the vibration sensor components are used to obtain the vibration signal of the moving device and transmit it to the controller.

5. The fault detection device for a mine frequency converter according to claim 4, characterized in that: The vibration sensor assembly is an intrinsically safe explosion-proof vibration sensor.

6. The fault detection device for a mine frequency converter according to claim 1, characterized in that: The acoustic information sensing module includes a plurality of acoustic sensing components, which are distributed inside and outside the inverter cabinet. The acoustic sensing components are used to obtain fault acoustic signals of the moving device and transmit them to the controller.

7. The fault detection device for a mine frequency converter according to claim 6, characterized in that: The acoustic sensor component includes a filter module, a micro-signal amplification module and a data conversion chip connected in sequence. The filter module is used to filter the acoustic signal inside or outside the inverter cabinet, the micro-signal amplification module is used to amplify the acoustic signal after filtering, and the data conversion chip is used to calculate and perform analog-to-digital conversion on the acoustic signal after amplification to obtain a fault acoustic signal, and transmit it to the controller.

8. The fault detection device for a mining frequency converter according to claim 1, characterized in that: The frequency converter, sampling unit and controller communicate and interact via an Ethernet local area network.

9. The fault detection device for a mining frequency converter according to claim 1, characterized in that: The controller is provided with a display module.

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