A ball mill large gear lubrication monitoring device, method and controller

Abstract

The present invention discloses a ball mill large gear lubrication monitoring device, method and controller to solve the problem of unstable lubrication effect of large gears during the operation of the ball mill in the prior art. The ball mill large gear lubrication monitoring platform constructed therein can make corresponding instructions based on data collected in real time by flow meters, temperature transmitters, pressure sensors, vibration sensors and electric energy modules according to simple threshold judgment and data statistics, and can realize stable and reliable automatic injection of lubricating oil to the large gear surface through the execution of the heating system, three-phase isolation voltage regulating module and oil injection motor, thereby ensuring the lubrication effect of large gears during the operation of the ball mill.

Description

Technical Field

[0001] The invention relates to the technical field of ball mill gear maintenance, and in particular to a ball mill large gear lubrication monitoring device and method. Background Art

[0002] Ball mills are widely used in power plants, mines and other industries. The motor drives the pinion to rotate through the reducer, and the large gear meshes with the small gear to achieve synchronous rotation, thereby driving the drum to rotate to achieve powder production. It can be seen that the large gear is the main transmission component of the ball mill. The open structure of the large gear causes the lubricating oil on the tooth surface to be thrown out when it rotates, resulting in severe wear on the tooth surface when the large and small gears are meshed. At the same time, impurities or solid particles are easily attached to the gear surface, further causing wear when the large and small gear surfaces are meshed. The combination of the above two factors further leads to problems such as cracks and broken teeth on the large and small gears.

[0003] Therefore, ensuring that the large gear tooth surface has a good lubrication state and scientifically and reasonably spraying lubricating oil to the tooth surface to ensure the lubrication effect is a topic that needs to be studied urgently. Summary of the invention

[0004] To this end, the embodiments of the present invention provide a ball mill large gear lubrication monitoring device, method and controller to solve the problem of unstable large gear lubrication effect during the operation of the ball mill in the prior art.

[0005] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0006] In a first aspect, a ball mill gear lubrication monitoring device includes a controller, a human-computer interaction device, a flow meter, a temperature transmitter, a pressure sensor, a vibration sensor, an electric energy module, a three-phase isolation voltage regulating module, a heating system, and an oil injection motor;

[0007] The oil injection motor is used to inject lubricating oil;

[0008] The flow meter is used to measure the injection amount of the lubricating oil;

[0009] The temperature transmitter is used to collect the temperature of the oil pipe and the oil tank;

[0010] The pressure sensor is used to measure the oil pipe pressure;

[0011] The vibration sensor is used to measure the vibration amplitude of the large gear during operation;

[0012] The electric energy module is used to measure the power consumption parameters of the electric equipment to monitor the status of the electric equipment in real time, and the electric equipment includes the fuel injection motor and the heating system;

[0013] The three-phase isolation voltage regulation module is used to realize the soft start of the motor;

[0014] The heating system is used to heat the oil pipe and the oil tank respectively;

[0015] The data output ends of the flow meter, temperature transmitter, pressure sensor, vibration sensor and electric energy module are respectively connected to the multi-channel data input ends of the controller; the control input ends of the three-phase isolation voltage regulation module, heating system and injection motor are respectively connected to the multi-channel control output ends of the controller; the controller is also connected to the human-computer interaction devices for two-way communication.

[0016] Optionally, the controller also transmits data to the control room through a data transmission terminal to support remote control of the control room.

[0017] Optionally, the vibration sensor is a uniaxial acceleration sensor installed at the fuel injector.

[0018] Optionally, the controller adopts PLC and the human-computer interaction device adopts a touch screen.

[0019] Optionally, the controller is connected to the power module via a 485 interface, reads the parameters measured by the power module, and determines whether the heating circuit and the motor circuit are normal according to the set threshold value, thereby realizing the self-check function of the monitoring device itself.

[0020] Optionally, the monitoring device further comprises an alarm unit for responding to an alarm instruction output by the controller and issuing an alarm signal; the alarm instruction comprises an oil pipe blockage alarm, a low oil level alarm, a large gear vibration alarm and a machine failure alarm.

[0021] In a second aspect, a ball mill gear lubrication monitoring method comprises:

[0022] Output heating control signal to heat the oil pipe through the heating system;

[0023] According to the real-time collected power consumption parameters of the heating system, determine whether the heating circuit is faulty; if so, output a shutdown control signal to stop the ball mill; if not, proceed to the next step;

[0024] According to the real-time collected oil pipe and oil tank temperature data, it is determined whether the current temperature value reaches the preset temperature range that satisfies the fuel injection operation; if so, the motor start control signal is intermittently outputted at a fixed time, and the fuel injection motor soft start is realized through the three-phase isolation voltage regulation module; if not, the oil pipe is continued to be heated through the heating system;

[0025] During the process of fuel injection timing start, the threshold value of the oil pipe pressure data collected in real time is judged. If the oil pipe pressure is abnormal, a shutdown control signal is output to stop the ball mill and fuel injection motor; if it is normal, proceed to the next step;

[0026] According to the real-time collected injection amount, determine whether the oil nozzle is blocked; if yes, output the shutdown control signal and alarm control signal to stop the ball mill and the injection motor, and make the alarm unit send out an alarm signal; if no, proceed to the next step;

[0027] The working state of the large gear is determined based on the vibration amplitude of the large gear during operation within the set time period. If the vibration of the large gear exceeds the limit, a shutdown control signal and an alarm control signal are output to stop the ball mill and the fuel injection motor, and to cause the alarm unit to send out an alarm signal.

[0028] Optionally, before the output heating control signal, the injection interval time, injection amount, pipeline temperature, fuel tank temperature, maximum / minimum limit of fuel pipe pressure, and large gear vibration alarm threshold set by the user are received.

[0029] Optionally, the working state of the large gear is judged based on the vibration amplitude of the large gear during operation within a set time period collected, specifically: reading the analog signal of the acceleration sensor installed at the injector, extracting characteristic variables from the read data, and comprehensively judging the working state of the large gear; the characteristic variables include mean, effective value, variance and warpage.

[0030] In a third aspect, a controller for monitoring the lubrication of a ball mill gear comprises a processor and a memory, wherein the memory stores a computer program, and the controller is special in that the processor implements the steps of the above-mentioned monitoring method when executing the computer program.

[0031] The present invention has at least the following beneficial effects:

[0032] The present invention constructs a ball mill large gear lubrication monitoring platform. Based on the data collected in real time by the flow meter, temperature transmitter, pressure sensor, vibration sensor and electric energy module, corresponding instructions can be made according to simple threshold judgment and data statistics. Through the execution of the heating system, the three-phase isolation voltage regulation module and the oil injection motor, the lubricating oil can be automatically sprayed to the large gear surface stably and reliably, ensuring the lubrication effect of the large gear during the operation of the ball mill. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly explain the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the embodiments of the present invention. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, other drawings can be derived from the provided drawings without creative work.

[0034] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0035] Figure 1 A schematic diagram of the structure of a monitoring device system provided by an embodiment of the present invention;

[0036] Figure 2 A flow chart of a monitoring method provided by one embodiment of the present invention;

[0037] Figure 3 A schematic diagram of communication connections in one embodiment of the present invention;

[0038] Figure 4 A schematic diagram of digital quantity input wiring in one embodiment of the present invention;

[0039] Figure 5 A schematic diagram of digital quantity output connection in one embodiment of the present invention;

[0040] Figure 6 A schematic diagram of analog input terminal connection in one embodiment of the present invention;

[0041] Figure 7 The figure is a wiring diagram of an analog output terminal in one embodiment of the present invention. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] In the description of the present invention, unless otherwise specified, "plurality" means two or more. The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are intended to distinguish the objects referred to. For schemes with a sequential flow, this terminology does not have to be understood as describing a specific order or sequence. For schemes with device structures, this terminology does not distinguish between importance, positional relationships, etc.

[0044] In addition, the terms "comprises", "has" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that have been explicitly listed, but may also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or apparatuses, or steps or units that are added based on further optimization schemes conceived by the present invention.

[0045] A ball mill gear lubrication monitoring device includes a controller, a human-computer interaction device, a flow meter, a temperature transmitter, a pressure sensor, a vibration sensor, an electric energy module, a three-phase isolation voltage regulating module, a heating system and an oil injection motor; wherein:

[0046] The oil injection motor is used to inject lubricating oil;

[0047] The flow meter is used to measure the injection amount of lubricating oil;

[0048] The temperature transmitter is used to collect the temperature of the oil pipe and oil tank;

[0049] The pressure sensor is used to measure the oil pipe pressure;

[0050] The vibration sensor is used to measure the vibration amplitude of the large gear during operation; the vibration sensor adopts a single-axis acceleration sensor and is installed at the fuel injection nozzle;

[0051] The electric energy module is used to measure the power consumption parameters of the electric equipment to monitor the status of the electric equipment in real time. The electric equipment includes the fuel injection motor and the heating system;

[0052] The three-phase isolated voltage regulator module is used to realize the soft start of the motor;

[0053] The heating system is used to heat the oil pipe and the oil tank respectively;

[0054] The data output ends of the flow meter, temperature transmitter, pressure sensor, vibration sensor and electric energy module are respectively connected to the multi-channel data input ends of the controller; the control input ends of the three-phase isolation voltage regulation module, heating system and injection motor are respectively connected to the multi-channel control output ends of the controller; the controller is also connected to the human-computer interaction equipment for two-way communication.

[0055] Human-machine interaction devices such as touch screens can be used to set the injection interval time, injection volume, pipeline temperature, fuel tank temperature, maximum / minimum limit of fuel pipe pressure, and large gear vibration alarm threshold.

[0056] The controller can be a PLC. PLC collects the temperature of the oil pipe and oil tank through the temperature transmitter to control the relevant temperature; PLC reads the data of the pipeline pressure sensor to monitor the injection pressure each time, and when it is greater than or less than the limit value, the machine will stop and alarm; PLC reads the flow meter pulse signal and calculates the injection amount in real time; PLC reads the analog signal of the acceleration sensor, extracts features from the read data, and judges the working state of the large gear. The feature variables include: mean, effective value, variance, warpage, etc.; PLC connects to the power module through the 485 interface, reads the voltage, current, power and other parameters measured by the power module in real time, and then judges whether the heating circuit and motor circuit are normal, and realizes the self-check function of the system itself; In order to avoid excessive current when the lubrication equipment motor is directly started, the PLC controls the conduction angle of the three-phase isolation voltage regulator module to gradually increase the speed of the three-phase motor to the rated speed.

[0057] In order to realize remote control of the control room and avoid the difficulty of wired laying, PLC also transmits data to the control room through a data transmission terminal (wireless data transmission radio).

[0058] The controller is preferably Siemens PLC (S7-1214C), and the human-computer interaction device is preferably Kunlun touch screen (TPC7062Ti).

[0059] The ball mill large gear lubrication monitoring device is as follows: Figure 1 As shown, the PLC and the touch screen in the monitoring device are connected through the Ethernet port. The PLC communicates with the control room through a wireless data transmission radio, and the communication protocol is LORA. Other devices are connected to the PLC through wires. Specifically:

[0060] (1) Touch screen: Real-time display of pipeline temperature, fuel injection volume, fuel injection pressure, and device power consumption data. Display of various statistical and analytical data, including fuel injection volume, fuel injection time, fuel injection times, operating time, heating set temperature, vibration signal characteristic variables, pipeline pressure, etc.

[0061] (2) PLC: As the device controller, it stores the developed program and executes it cyclically. It also realizes data transmission with the touch screen and the control room.

[0062] (3) Flow meter: Output is 24V pulse signal to PLC, with an accuracy of 3mL / pulse. It is mainly used to measure the amount of oil when injecting lubricating oil, and can also determine whether the oil nozzle is blocked.

[0063] (4) Vibration sensor: A single-axis acceleration sensor is used, installed near the fuel injector, to directly measure the vibration amplitude of the large gear running device. The output signal is 0-10V and the measurement range is 0-5g.

[0064] (5) Pressure sensor: The output signal of the pressure sensor is 0-20mA. It is installed at the output end of the oil pipe to measure the oil pipe pressure. When the injection motor is running, if the pressure is lower than the set value, it may be that the oil level is lower than the oil suction port or the oil pump is damaged. When the pressure is higher than the set value, it may be that the overflow valve is faulty. When the monitoring value is abnormal, a fault alarm is issued and the machine is shut down.

[0065] (5) Power module: The power module realizes data transmission with PLC through port 485. The main power-consuming equipment of this device includes: oil pipe heater and oil tank heater. By measuring power consumption data through this module, the status of power-consuming equipment can be monitored in real time, and fault warning of the machine can be realized.

[0066] (6) Three-phase isolation voltage regulation module: When the motor starts, the starting current is relatively large, so a voltage regulation module is used to achieve motor soft start.

[0067] (7) Heating system: including pipeline heating and oil tank heating. Reduce the viscosity coefficient of lubricating oil and realize lubricating oil mist injection. Since the heated medium is lubricating oil, it is a hazardous liquid. This device measures the voltage, current, active power and other electrical parameters of the heater in real time through the power module. When the measured value is abnormal, an alarm is issued to shut down the machine.

[0068] (8) Alarm lights: mainly include oil pipe blockage alarm, low oil level alarm, large gear vibration alarm, and machine failure alarm.

[0069] like Figure 2 As shown, the PLC controls the heating system, fuel injection motor and ball mill according to the following steps:

[0070] Output heating control signal to heat the oil pipe through the heating system;

[0071] According to the real-time collected power consumption parameters of the heating system, determine whether the heating circuit is faulty; if so, output a shutdown control signal to stop the ball mill; if not, proceed to the next step;

[0072] According to the real-time collected oil pipe and oil tank temperature data, it is determined whether the current temperature value reaches the preset temperature range that satisfies the fuel injection operation; if so, the motor start control signal is intermittently outputted at a fixed time, and the fuel injection motor soft start is realized through the three-phase isolation voltage regulation module; if not, the oil pipe is continued to be heated through the heating system;

[0073] During the process of fuel injection timing start, the threshold value of the oil pipe pressure data collected in real time is judged. If the oil pipe pressure is abnormal, a shutdown control signal is output to stop the ball mill and fuel injection motor; if it is normal, proceed to the next step;

[0074] According to the real-time collected injection amount, determine whether the oil nozzle is blocked; if yes, output the shutdown control signal and alarm control signal to stop the ball mill and the injection motor, and make the alarm unit send out an alarm signal; if no, proceed to the next step;

[0075] The working state of the large gear is determined based on the vibration amplitude of the large gear during operation within the set time period. If the vibration of the large gear exceeds the limit, a shutdown control signal and an alarm control signal are output to stop the ball mill and the fuel injection motor, and to cause the alarm unit to send out an alarm signal.

[0076] like Figure 3 As shown in the figure, the communication part of the monitoring device is introduced:

[0077] (1) The touch screen and PLC communicate through the PROFINET interface.

[0078] (2) The power module is connected to the PLC through a 485 hub.

[0079] The power module reads the voltage, current, power and other parameters of the heater and motor. The PLC reads the relevant data of the power module regularly. When the PLC determines that the relevant data is abnormal, Figure 5 ALM5 flashes in alarm.

[0080] (3) Data transmission terminal A is connected to PLC via 485 hub.

[0081] The data transmission terminals communicate wirelessly, and the transmission protocol is LORA. PLC sends data to the data transmission terminal B in the control room in a wireless form through the data transmission terminal A. The transmission distance is generally 3-5 kilometers.

[0082] like Figure 4 As shown in the figure, the introduction of digital input wiring:

[0083] DI1.0 and DI1.1 are connected to the three-speed two-section rotary switch SA1, corresponding to local start and remote start.

[0084] DI1.2 is connected to the auxiliary normally open contactor KM1, and closing indicates that the injection motor starts.

[0085] DI1.3 is connected to the float oil level QK1 meter, and closing indicates low oil level. Figure 5 The middle warning light ALM3 flashes to warn you to refuel.

[0086] DI1.5 is the flow meter pulse input terminal, with an accuracy of 3mL / pulse. When the read value is less than the set value, Figure 5 The middle alarm light ALM1 flashes to warn.

[0087] like Figure 5 , Introduction to digital output connection:

[0088] DO1.0 is connected to the coil of the intermediate relay KA1, and the normally open contact of KA1 controls the contactor KM1. When KA1 is closed, the normally open contact of KM1 is energized, and the fuel injection motor runs.

[0089] DO1.1 is connected to the intermediate relay KA2. When it is closed, the pipeline heater starts to work and start heating the pipeline.

[0090] DO1.2 is connected to the intermediate relay KA3. When it is closed, the oil tank heater starts to work and start heating the oil tank.

[0091] DO1.3 is connected to the warning light ALM1. If ALM1 is on, it means the fuel injector is clogged.

[0092] DO1.4 is connected to the alarm light ALM2. If ALM2 is on, it means the pipeline oil pressure is too high or too low.

[0093] DO1.5 is connected to the warning light ALM3. When ALM3 is on, it means the oil level in the fuel tank is low, and it is recommended to refuel the tank in time.

[0094] DO1.6 is connected to the alarm light ALM4. ALM4 is on, indicating that the vibration of the large gear exceeds the limit.

[0095] DO1.7 is connected to the alarm light ALM5. If ALM5 is on, it means the heater in the device is abnormal.

[0096] like Figure 6 , Introduction to analog input terminal connection:

[0097] Analog channel 0 (AI1.0) reads the pipeline temperature through temperature transmitter BT1.

[0098] Analog channel 1 (AI1.1) reads the tank temperature through temperature transmitter BT2.

[0099] Analog channel 2 (AI1.2) reads the pipeline pressure data through pressure transmitter SP1 to determine whether the pressure is normal. When the PLC determines that it is abnormal, Figure 5 The ALM2 indicator light flashes to indicate an alarm.

[0100] Analog channel 3 (AI1.3) reads the data of acceleration sensor YD1 and then processes the data to determine whether the vibration of the ball mill gear exceeds the limit. Figure 5 ALM4 is bright.

[0101] like Figure 7 , Introduction to analog output terminal connection:

[0102] UM is a voltage regulating module. PLC controls the conduction angle of the voltage regulating module to control the motor starting process and reduce the generation of large current at the starting moment.

[0103] This embodiment fills the gaps in existing large gear jet lubrication systems, which can only achieve timed oil injection, fault alarm, storage of oil injection times and times, and wired transmission of some data.

[0104] The present invention adopts Siemens PLC as the main control system and Kunlun touch screen as the local display device, which can not only realize automatic injection of lubricating oil to the large gear surface, data statistics, and data storage, but also realize large gear vibration state detection, lubricating oil injection quantity statistics, large gear fault warning, wireless data transmission and other functions.

[0105] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0106] The present invention is described in more detail through general description and specific embodiments. It should be noted that, without departing from the concept of the present invention, it is obvious that several variations and improvements can be made to these specific embodiments, which all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the attached claims.

Claims

1. A ball mill large gear lubrication monitoring device, characterized in that: Including controller, human-machine interaction equipment, flow meter, temperature transmitter, pressure sensor, vibration sensor, power module, three-phase isolation voltage regulator module, heating system, alarm unit and fuel injection motor; The oil injection motor is used to inject lubricating oil; The flow meter is used to measure the injection amount of the lubricating oil; The temperature transmitter is used to collect the temperature of the oil pipe and the oil tank; The pressure sensor is used to measure the oil pipe pressure; The vibration sensor is used to measure the vibration amplitude of the large gear during operation; The electric energy module is used to measure the power consumption parameters of the electric equipment to monitor the status of the electric equipment in real time, and the electric equipment includes the fuel injection motor and the heating system; The three-phase isolated voltage regulating module is used to realize the soft start of the fuel injection motor; The heating system is used to heat the oil pipe and the oil tank respectively; The alarm unit is used to respond to the alarm instruction output by the controller and send out an alarm signal; The data output ends of the flow meter, temperature transmitter, pressure sensor, vibration sensor and electric energy module are respectively connected to the multi-channel data input ends of the controller; the control input ends of the three-phase isolation voltage regulation module, heating system and fuel injection motor are respectively connected to the multi-channel control output ends of the controller; the controller is also connected to the human-computer interaction device for two-way communication; The controller controls the heating system, the fuel injection motor and the ball mill according to the following steps: Output heating control signal to heat the oil pipe through the heating system; According to the real-time collected power consumption parameters of the heating system, determine whether the heating circuit is faulty; if so, output a shutdown control signal to stop the ball mill; if not, proceed to the next step; According to the real-time collected oil pipe and oil tank temperature data, it is determined whether the current temperature value reaches the preset temperature range that satisfies the fuel injection operation; if so, the fuel injection motor start control signal is intermittently outputted at a fixed time, and the fuel injection motor soft start is realized through the three-phase isolation voltage regulation module; if not, the oil pipe is continued to be heated through the heating system; During the timed start-up of the fuel injection motor, the threshold value of the oil pipe pressure data collected in real time is judged. If the oil pipe pressure is abnormal, a shutdown control signal is output to stop the ball mill and the fuel injection motor; if it is normal, proceed to the next step; According to the real-time collected fuel injection amount, determine whether the fuel nozzle is blocked; if yes, output the shutdown control signal and alarm command to stop the ball mill and fuel injection motor, and make the alarm unit send out an alarm signal; if no, proceed to the next step; The working state of the large gear is determined based on the vibration amplitude of the large gear during operation within the set time period. If the vibration of the large gear exceeds the limit, a shutdown control signal and an alarm command are output to stop the ball mill and the fuel injection motor, and the alarm unit sends an alarm signal.

2. The ball mill large gear lubrication monitoring device according to claim 1 is characterized in that: The controller also transmits data to the control room through the data transmission terminal to support remote control of the control room.

3. The ball mill large gear lubrication monitoring device according to claim 1, characterized in that: The vibration sensor is a uniaxial acceleration sensor installed at the fuel injection nozzle.

4. The ball mill large gear lubrication monitoring device according to claim 1, characterized in that: The controller adopts PLC, and the human-computer interaction device adopts a touch screen.

5. The ball mill large gear lubrication monitoring device according to claim 1, characterized in that: The controller is connected to the power module via a 485 interface, reads the parameters measured by the power module, and determines whether the heating circuit and the motor circuit are normal according to the set threshold value, thereby realizing the self-checking function of the monitoring device itself.

6. The ball mill large gear lubrication monitoring device according to claim 1, characterized in that: The alarm instructions include oil pipe blockage alarm, low oil level alarm, large gear vibration alarm and machine failure alarm.

7. The ball mill large gear lubrication monitoring device according to claim 1, characterized in that: Before the heating control signal is output, the fuel injection interval time, fuel injection amount, pipeline temperature, fuel tank temperature, maximum / minimum limit of fuel pipe pressure, and large gear vibration alarm threshold value set by the user are received.

8. The ball mill large gear lubrication monitoring device according to claim 1, characterized in that: The method of judging the working state of the large gear according to the vibration amplitude of the large gear during operation within a set time period is specifically: reading the analog signal of the acceleration sensor installed at the injector, extracting characteristic variables from the read data, and comprehensively judging the working state of the large gear; the characteristic variables include mean, effective value, variance and warpage.

9. A controller for lubrication monitoring of a ball mill gear, comprising a processor and a memory, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the following steps are implemented: Output heating control signal to heat the oil pipe through the heating system; According to the real-time collected power consumption parameters of the heating system, determine whether the heating circuit is faulty; if so, output a shutdown control signal to stop the ball mill; if not, proceed to the next step; According to the real-time collected oil pipe and oil tank temperature data, it is determined whether the current temperature value reaches the preset temperature range that satisfies the fuel injection operation; if so, the fuel injection motor start control signal is intermittently outputted at a fixed time, and the fuel injection motor soft start is realized through the three-phase isolation voltage regulation module; if not, the oil pipe is continued to be heated through the heating system; During the timed start-up of the fuel injection motor, the threshold value of the oil pipe pressure data collected in real time is judged. If the oil pipe pressure is abnormal, a shutdown control signal is output to stop the ball mill and the fuel injection motor; if it is normal, proceed to the next step; According to the real-time collected fuel injection amount, determine whether the fuel nozzle is blocked; if yes, output the shutdown control signal and alarm command to stop the ball mill and fuel injection motor, and make the alarm unit send out an alarm signal; if no, proceed to the next step; The working state of the large gear is determined based on the vibration amplitude of the large gear during operation within the set time period. If the vibration of the large gear exceeds the limit, a shutdown control signal and an alarm command are output to stop the ball mill and the fuel injection motor, and the alarm unit sends an alarm signal.

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