Bucket wheel machine oil tank leakage protection method and system

Abstract

The application provides a bucket wheel machine oil tank oil leakage protection method and system, comprising: collecting oil level data and oil temperature data of the bucket wheel machine oil tank in real time; based on the oil temperature data, temperature compensation is performed on the oil level data to obtain a corrected oil level value; an oil level protection fixed value is set, wherein the setting process of the oil level protection fixed value comprises: based on the initial oil level after oiling, combined with oil temperature compensation and oil level calibration of the bucket wheel machine cantilever at the lowest pitch angle, the oil level drop threshold is comprehensively determined as the oil level protection fixed value; the corrected oil level value is compared with the oil level protection fixed value in real time; when the corrected oil level value is lower than the oil level protection fixed value, a protection action is triggered, and the protection action comprises cutting off the power supply of the oil pump and sending an alarm signal. Through the monitoring mode of real-time collection, the timeliness, accuracy and reliability of the oil leakage protection are improved.

Description

Technical Field

[0001] This invention relates to the field of oil leakage protection technology, and in particular to a method and system for protecting the oil tank of a bucket wheel excavator from oil leakage. Background Technology

[0002] As a large-scale bulk material handling equipment, the bucket wheel excavator has separate hydraulic oil tanks for its bucket wheel mechanism and luffing mechanism. In actual operation, the risk of hydraulic oil pipes rupturing due to aging, fatigue, and other reasons always exists. Once a rupture occurs, the hydraulic oil in the tank will leak rapidly, causing not only huge direct economic losses but also equipment downtime and severely impacting production.

[0003] Currently, bucket wheel excavator hydraulic oil tanks are typically equipped with low oil level protection devices. However, the original design purpose of such protection devices was primarily to prevent the oil pump from being damaged by idling at low oil levels. Therefore, when a sudden and rapid leak occurs, such as an oil pipe rupture, the existing low oil level protection often fails to detect the abnormal oil level drop in a timely and accurate manner due to the inherent errors in oil level measurement and the instability of the reference when the equipment shakes or tilts. This results in delayed or failed protection action, failing to effectively stop the continuous oil leakage, and its "protection" function has significant limitations. Summary of the Invention

[0004] This invention provides a method and system for protecting the oil tank of a bucket wheel excavator from oil leakage, which solves the defects of existing technologies that cannot accurately and reliably protect against oil leakage.

[0005] In a first aspect, the present invention provides a method for protecting the oil tank of a bucket wheel excavator from oil leakage, comprising: Real-time collection of oil level and oil temperature data from the bucket wheel excavator's oil tank; Based on the oil temperature data, temperature compensation is performed on the oil level data to obtain a corrected oil level value; Setting an oil level protection setpoint, wherein the process of setting the oil level protection setpoint includes: based on the initial oil level after refueling, combined with oil temperature compensation and oil level calibration of the bucket wheel excavator boom at the lowest pitch angle, comprehensively determining the oil level drop threshold as the oil level protection setpoint; The corrected oil level value is compared with the oil level protection setting value in real time; When the corrected oil level value is lower than the oil level protection setpoint, a protection action is triggered, which includes cutting off the oil pump power supply and issuing an alarm signal.

[0006] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes, wherein the step of performing temperature compensation on the oil level data based on the oil temperature data to obtain a corrected oil level value includes: The volume expansion coefficient and standard reference oil temperature of the oil in the pre-stored oil tank; Calculate the difference between the real-time oil temperature and the standard reference oil temperature; Based on the difference and the volume expansion coefficient, calculate the compensation amount for oil level change caused by temperature change; The oil level data is corrected based on the oil level change compensation amount to eliminate the influence of temperature fluctuations on the oil level measurement value.

[0007] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes calculating a compensation amount for oil level changes caused by temperature changes based on the difference and the coefficient of volume expansion, comprising: ΔL=α L0 ΔT Where ΔL is the oil level change compensation amount, α is the volume expansion coefficient of the oil, L0 is the initial oil level height of the tank measured at the standard reference oil temperature, and ΔT is the difference between the real-time oil temperature and the standard reference oil temperature.

[0008] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes calibrating the oil level of the bucket wheel excavator boom at its lowest pitch angle, comprising: Control the bucket wheel excavator's boom to its lowest pitch angle and maintain a stable state; Under the stable condition, the oil level in the tank is recorded as the reference oil level; The reference oil level is compared with the oil level protection setting set by the system to dynamically correct the oil level protection setting and ensure the effectiveness of the oil level protection setting under extreme working conditions of the equipment.

[0009] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes, wherein the step of correlating and comparing the reference oil level with the oil level protection setpoint of the system includes: Set the reference oil level to the new oil level protection setting under the current operating conditions; or... Calculate the deviation between the reference oil level and the theoretical oil level, and compensate the preset oil level protection setting based on the deviation.

[0010] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes, wherein the offset compensation for the preset oil level protection setting based on the deviation includes: The difference between the reference oil level and the corresponding theoretical oil level is used as the offset. The offset is superimposed on the preset original oil level protection setting to generate the calibrated final oil level protection setting.

[0011] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes issuing an alarm signal, comprising: Based on the rate of oil level drop when the corrected oil level value is lower than the oil level protection setting, different levels of alarm signals are triggered. Specifically, when the oil level is below the protection setpoint but is in a slow decline phase, a Level 1 warning signal is triggered; when the oil level is below the protection setpoint and is in a rapid decline phase, a Level 2 emergency alarm signal is triggered.

[0012] A method for protecting the oil tank of a bucket wheel excavator according to the present invention further includes: Record historical oil level data and generate oil level change trend curves; Before the corrected oil level value triggers the protection action, if the analysis of the oil level change trend curve indicates that the oil level has a continuous abnormal downward trend, a maintenance warning signal will be issued in advance.

[0013] According to the present invention, a method for protecting the oil tank of a bucket wheel excavator from oil leakage includes, after the protection action is triggered: Maintain the alarm signal and lock the automatic start function of the oil pump; The alarm will be deactivated and the system will be reset only after the operator confirms the reset command on-site and enters it manually.

[0014] Secondly, the present invention provides a bucket wheel excavator oil tank leakage protection system, comprising: The data acquisition module is used to collect real-time data on oil level and oil temperature in the bucket wheel excavator's oil tank. The compensation module is used to perform temperature compensation on the oil level data based on the oil temperature data to obtain a corrected oil level value; The setting module is used to set the oil level protection setpoint. The setting process of the oil level protection setpoint includes: based on the initial oil level after refueling, combined with oil temperature compensation and oil level calibration of the bucket wheel excavator boom at the lowest pitch angle, the oil level drop threshold is comprehensively determined as the oil level protection setpoint. The comparison module is used to compare the corrected oil level value with the oil level protection setting value in real time; The protection module is used to trigger a protection action when the corrected oil level value is lower than the oil level protection setpoint. The protection action includes cutting off the oil pump power supply and issuing an alarm signal.

[0015] Thirdly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the oil leakage protection method for the bucket wheel engine oil tank as described above.

[0016] Fourthly, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the oil leakage protection method for bucket wheel engine oil tank as described above.

[0017] Fifthly, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the oil leakage protection method for bucket wheel excavator oil tanks as described above.

[0018] This invention provides a method and system for protecting the oil tank of a bucket wheel excavator from oil leakage. By introducing oil temperature data to compensate for the oil level measurement value in real time, it effectively eliminates the impact of oil volume expansion and contraction caused by temperature changes on the measurement accuracy. Furthermore, by combining the oil level calibration of the cantilever at the lowest pitch angle, it eliminates the measurement reference error caused by the attitude change of the equipment, thereby obtaining more realistic and accurate oil tank level data under all working conditions. When abnormal situations such as oil pipe rupture occur, it can immediately trigger the protection action, automatically cut off the oil pump power supply and stop the oil supply from the source, and issue an alarm, thus better realizing oil leakage protection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a flowchart illustrating the oil tank leakage protection method for bucket wheel excavators provided in this embodiment; Figure 2 This is a schematic diagram of the oil tank leakage protection system for bucket wheel excavators provided in this embodiment; Figure 3 This is a schematic diagram of the structure of the electronic device provided in this embodiment. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0022] Figure 1 This is a flowchart illustrating the oil leakage protection method for the bucket wheel excavator oil tank provided in this embodiment.

[0023] Before implementing oil leak protection methods, it is necessary to first set up the hardware system, specifically as follows: Oil level transmitter installation: Each bucket wheel excavator has a bucket wheel oil tank and a luffing oil tank. Install one oil level transmitter in each of these tanks. The installation location is chosen in the middle area of ​​the side of the tank, as this position covers most of the oil level range from high to low, preventing the transmitter from failing to detect levels that are too high or too low. During installation, the transmitter must be securely fixed, for example, with bolts tightened to the tank wall, to prevent displacement due to vibration during excavator operation and ensure stable measurement. The oil level transmitter continuously collects oil level data from the tank, converting it into an electrical signal for transmission; it is the core component for obtaining oil level information.

[0024] Temperature sensor installation: Install one temperature sensor in each fuel tank. The installation location should be at the bottom of the tank, near the fuel outlet pipe. The oil temperature at this location best represents the overall temperature of the oil in the tank. Avoid installing it on the top or edge of the tank, as this will lead to inaccurate measurements. The sensor probe should be inserted into the oil, but not touch the tank wall to prevent wall temperature interference. The temperature sensor can collect real-time oil temperature data, providing a basis for subsequent correction of oil level errors.

[0025] Control module setup: Select a standard PLC controller and install it in the control room of the bucket wheel excavator. Then, connect the previously installed oil level transmitter and temperature sensor to the PLC controller using wires, ensuring that the electrical signals from both can be smoothly transmitted to the controller. Simultaneously, write a basic program for the PLC controller: capable of receiving signals, storing preset parameters (such as the oil expansion coefficient), performing data calculations, and making logical judgments. This is equivalent to the "brain" of the entire protection system, responsible for processing all data and determining whether any abnormalities exist.

[0026] Alarm / Protection Device Installation. Alarm Device: Install one set of indicator lights (at least yellow and red) and one buzzer in the control room, in a location where the operator can see and hear them, such as the front of the control panel. Protection Device: Connect a relay in series in the oil pump's power circuit. This relay is then connected to the PLC controller, allowing the PLC controller to control the relay's on / off state, thereby controlling the oil pump's power supply. The alarm device allows operators to be promptly informed of fault conditions, while the protection device can shut off the oil pump in case of abnormalities, preventing damage at its source.

[0027] After the hardware setup is complete, a leak protection process needs to be implemented, such as... Figure 1 As shown in the figure, the oil leakage protection method for bucket wheel excavator oil tank provided in this embodiment of the invention mainly includes the following steps: 101. Real-time acquisition of oil level and oil temperature data from the bucket wheel excavator's oil tank.

[0028] Specifically, after starting the bucket wheel excavator, first turn on the oil level transmitter, temperature sensor, and control module. The oil level transmitter will continuously monitor the oil level in the tank, transmitting oil level data (e.g., "current oil level signal") to the PLC controller approximately every 10 seconds. The temperature sensor will do the same, transmitting oil temperature data (e.g., "current oil temperature signal") to the PLC controller approximately every 10 seconds. By continuously acquiring real-time oil level and temperature data without data lag, a foundation is laid for accurate subsequent judgments.

[0029] 102. Based on the oil temperature data, perform temperature compensation on the oil level data to obtain the corrected oil level value.

[0030] Specifically, because oil expands and contracts with temperature changes, its volume increases when the oil temperature is high, making the oil level appear high; conversely, its volume decreases when the oil temperature is low, making the oil level appear low. This can lead to inaccurate oil level measurements. Therefore, oil temperature data is used to correct the oil level reading. The specific steps are as follows: Save the parameters in advance. First, check the "volume expansion coefficient" of the hydraulic oil in the tank, then calculate the oil temperature range of the bucket wheel excavator in the factory during normal operation, and take the middle value of this range as the "standard reference oil temperature" (for example, the oil temperature is mostly between 35-45℃, so take 40℃ as the standard). Input these two parameters (volume expansion coefficient and standard reference oil temperature) into the PLC controller in advance and save them.

[0031] Calculate the temperature difference. The PLC controller will automatically subtract the standard reference oil temperature from the real-time oil temperature to calculate the temperature difference ΔT (for example, if the real-time oil temperature is 45℃ and the standard is 40℃, then ΔT is 5℃).

[0032] Calculate the oil level compensation amount: Use formula (1) to calculate the compensation amount: ΔL=α L0 ΔT(1) Where ΔL is the oil level change compensation amount, α is the volume expansion coefficient of the oil, L0 is the initial oil level height of the tank measured at the standard reference oil temperature, and ΔT is the difference between the real-time oil temperature and the standard reference oil temperature.

[0033] For example, if the oil temperature is high, ΔT is a positive number and ΔL is also a positive number, indicating that the oil level is too high due to expansion, so ΔL should be subtracted; if the oil temperature is low, ΔT is a negative number and ΔL is also a negative number, indicating that the oil level is too low due to contraction, so ΔL should be added.

[0034] To obtain the corrected oil level value: The PLC controller calculates the corrected oil level value by adding or subtracting ΔL from the original oil level data collected by the oil level transmitter.

[0035] By correcting the oil level value, the error caused by oil temperature-induced oil volume change is eliminated, making the oil level data more accurate and preventing misjudgment of the oil level due to hot or cold weather.

[0036] 103. Set the oil level protection setpoint. The process of setting the oil level protection setpoint includes: based on the initial oil level after refueling, combined with oil temperature compensation and oil level calibration of the bucket wheel excavator boom at the lowest pitch angle, comprehensively determining the oil level drop threshold as the oil level protection setpoint.

[0037] Specifically, the oil level protection setting is the standard at which the oil level should drop to trigger protection. It needs to be set in conjunction with three conditions to ensure accuracy under any operating condition: Measure the initial oil level. After each fill of the oil tank, wait for a period of time (e.g., until the oil stops sloshing and stabilizes), then use an oil level transmitter to measure the oil level at this time. If the oil temperature at this time is exactly the standard reference oil temperature, this height is L0 (the initial oil level at the standard reference oil temperature); otherwise, perform temperature compensation to correct the measured oil level to the height at the standard reference oil temperature, and store it as L0 in the PLC. By determining the reference oil level when the oil tank is full, inaccurate initial values ​​are avoided due to the oil not stabilizing after filling.

[0038] Dynamic adjustment is achieved through oil temperature compensation. Because oil temperature fluctuates, the protection setpoint is not fixed. The PLC automatically adjusts the base protection setpoint (e.g., set to 70% of L0) based on the real-time oil temperature and the calculated ΔL. For example, if the base setpoint is H, the real-time protection setpoint is H ± ΔL. By making the protection setpoint change with the oil temperature, falsely low or high oil levels are avoided due to temperature fluctuations.

[0039] Calibration at the lowest cantilever pitch angle. When the bucket wheel excavator is operating, the cantilever pitches up and down. At the lowest pitch angle, the oil tank tilts, causing the oil to shift to one side, thus changing the oil level reference. Therefore, calibration is necessary: ​​First, operate the bucket wheel excavator to slowly lower the cantilever to the lowest pitch angle, and hold it for a period of time after it comes to a stop (until the oil in the tank stops swaying and stabilizes). Use an oil level transmitter to measure the oil level at this point and record it as the reference oil level.

[0040] Calibrate the protection settings. There are two options. Either set the "reference oil level" directly to the protection settings under the current operating conditions; or calculate the deviation between the "reference oil level" and the "theoretical oil level" (the oil level that should be at the lowest pitch angle calculated according to the oil tank size), add this deviation to the previous real-time protection settings, and obtain the final calibrated protection settings.

[0041] The oil level protection setting eliminates the influence of equipment posture changes. Even when the cantilever is lowered to its lowest position, the protection setting can still match the actual oil level, preventing missed detections and improving accuracy.

[0042] 104. Compare the corrected oil level value with the oil level protection setting value in real time.

[0043] Specifically, the PLC controller performs a comparison every second: comparing the corrected oil level value with the final oil level protection setting. If the corrected oil level value is greater than or equal to the final oil level protection setting, the system is considered normal and continues monitoring; if the corrected oil level value is less than the final oil level protection setting, the system is considered abnormal, indicating a possible oil leak, and immediately proceeds to the next step. By monitoring the oil level status in real time without delay, it can detect oil leaks as soon as the oil level falls below the "red line," improving the timeliness of oil leak protection.

[0044] 105. When the corrected oil level value is lower than the oil level protection set value, the protection action is triggered. The protection action includes cutting off the oil pump power supply and issuing an alarm signal.

[0045] Specifically, once an anomaly is detected, the PLC controller will immediately trigger two actions: Cut off the oil pump power: The PLC sends a power-off signal to the relay in the oil pump circuit. The relay immediately disconnects, and the oil pump stops. This stops the oil supply to the tank, preventing further oil leakage from the source and avoiding further leakage. This can quickly stop the damage and reduce oil waste and economic losses.

[0046] Level-based alarm system: The PLC first calculates the oil level drop rate (using the difference between two corrected oil level values, divided by the time difference between the two values), and then classifies the alarms according to the rate: Slow drop (e.g., the oil level drops slowly, possibly indicating a minor leak): Triggers a Level 1 warning, the yellow indicator light in the control room illuminates, and the buzzer sounds softly, reminding the operator, "There's a minor problem, check it immediately." Rapid drop (e.g., the oil level drops rapidly, possibly indicating a burst oil pipe): Triggers a Level 2 emergency alarm, the red indicator light illuminates, the buzzer sounds loudly and rapidly, and the alarm signal can also be sent to the operator's mobile phone (e.g., via the SMS module in the control room), prompting them to immediately respond to the situation. This level-based alarm system allows operators to quickly determine the urgency of the fault, preventing delays in handling the situation. Furthermore, when triggering protection actions, the system automatically records information such as "occurrence time, current corrected oil level value, oil temperature, drop rate, and alarm level," facilitating subsequent investigation of the cause.

[0047] In this embodiment, oil temperature data is introduced to compensate for the oil level measurement value in real time, effectively eliminating the impact of oil volume expansion and contraction caused by temperature changes on the measurement accuracy. Furthermore, combined with oil level calibration of the cantilever at the lowest pitch angle, the measurement reference error caused by the attitude change of the equipment is eliminated, thereby obtaining more realistic and accurate oil tank level data under all working conditions. When abnormal situations such as oil pipe rupture occur, the protection action can be triggered immediately, automatically cutting off the oil pump power supply and stopping the oil supply from the source, while issuing an alarm, thus better realizing oil leakage protection.

[0048] Furthermore, based on the above embodiments, this embodiment also includes recording historical oil level data and generating an oil level change trend curve; before correcting the oil level value to trigger a protection action, if the analysis of the oil level change trend curve determines that the oil level has a continuous abnormal downward trend, a maintenance warning signal is issued in advance.

[0049] Specifically, the data logging module can record oil level data and generate an oil level change trend curve. The PLC analyzes the oil level change trend curve. If the oil level normally decreases slowly (normal consumption), and suddenly the curve becomes steeper and the decrease is faster, even if it hasn't reached the protection setpoint, the PLC will trigger a maintenance warning (e.g., an orange indicator light will illuminate), reminding the operator that "there may be a small leak, check immediately." This allows potential problems to be detected early and faults to be eliminated in their infancy, rather than waiting for a large leak to occur before taking action.

[0050] Furthermore, this embodiment also includes maintaining the alarm signal and locking the automatic start function of the oil pump; the alarm is deactivated and the system is reset only after receiving a reset command confirmed on-site and manually input by the operator.

[0051] Specifically, after the protection action is triggered, the alarm signal will not stop automatically, and the automatic start function of the oil pump will also be locked. Even if the equipment wants to start the oil pump by itself, it cannot, to prevent operators from accidentally starting it before properly repairing it, which could lead to further oil leaks. Only when the operator arrives on-site, identifies and repairs the oil leak, adds sufficient oil to the tank, and manually presses the reset button on the PLC controller to input the reset command, will the system deactivate the alarm and restore the automatic start function of the oil pump. This prevents accidental operation after protection and ensures safety.

[0052] Based on the same general inventive concept, this invention also protects a bucket wheel excavator oil tank leakage protection system. The bucket wheel excavator oil tank leakage protection system described below can be referred to in correspondence with the bucket wheel excavator oil tank leakage protection method described above.

[0053] Figure 2 This is a schematic diagram of the oil tank leakage protection system for bucket wheel excavators provided in this embodiment.

[0054] like Figure 2 As shown, the bucket wheel excavator oil tank leakage protection system provided in this embodiment includes: The data acquisition module 201 is used to acquire real-time oil level and oil temperature data from the bucket wheel excavator's oil tank; The compensation module 202 is used to perform temperature compensation on the oil level data based on the oil temperature data to obtain the corrected oil level value; The setting module 203 is used to set the oil level protection setpoint. The setting process of the oil level protection setpoint includes: based on the initial oil level after refueling, combined with oil temperature compensation and oil level calibration of the bucket wheel excavator boom at the lowest pitch angle, the oil level drop threshold is comprehensively determined as the oil level protection setpoint. Comparison module 204 is used to compare the corrected oil level value with the oil level protection setting value in real time; The protection module 205 is used to trigger a protection action when the corrected oil level value is lower than the oil level protection set value. The protection action includes cutting off the oil pump power supply and issuing an alarm signal.

[0055] Figure 3 This is a schematic diagram of the structure of the electronic device provided in this embodiment.

[0056] like Figure 3 As shown, the electronic device may include a processor 301, a communication interface 302, a memory 303, and a communication bus 304. The processor 301, communication interface 302, and memory 303 communicate with each other via the communication bus 304. The processor 301 can call logical instructions from the memory 303 to execute a method for protecting the bucket wheel engine's oil tank from oil leakage.

[0057] Furthermore, the logical instructions in the aforementioned memory 303 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0058] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the oil leakage protection method for the bucket wheel engine oil tank provided by the above methods.

[0059] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the oil leakage protection method for bucket wheel excavator oil tanks provided by the above methods.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0061] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for protecting the oil tank of a bucket wheel excavator from oil leakage, characterized in that, include: Real-time collection of oil level and oil temperature data from the bucket wheel excavator's oil tank; Based on the oil temperature data, temperature compensation is performed on the oil level data to obtain a corrected oil level value; Setting an oil level protection setpoint, wherein the process of setting the oil level protection setpoint includes: based on the initial oil level after refueling, combined with oil temperature compensation and oil level calibration of the bucket wheel excavator boom at the lowest pitch angle, comprehensively determining the oil level drop threshold as the oil level protection setpoint; The corrected oil level value is compared with the oil level protection setting value in real time; When the corrected oil level value is lower than the oil level protection setpoint, a protection action is triggered, which includes cutting off the oil pump power supply and issuing an alarm signal.

2. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to claim 1, characterized in that, The step of performing temperature compensation on the oil level data based on the oil temperature data to obtain a corrected oil level value includes: The volume expansion coefficient and standard reference oil temperature of the oil in the pre-stored oil tank; Calculate the difference between the real-time oil temperature and the standard reference oil temperature; Based on the difference and the volume expansion coefficient, calculate the compensation amount for oil level change caused by temperature change; The oil level data is corrected based on the oil level change compensation amount to eliminate the influence of temperature fluctuations on the oil level measurement value.

3. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to claim 2, characterized in that, Based on the difference and the coefficient of volume expansion, calculate the compensation amount for oil level change caused by temperature change, including: ΔL=a L0 ΔT Where ΔL is the oil level change compensation amount, α is the volume expansion coefficient of the oil, L0 is the initial oil level height of the tank measured at the standard reference oil temperature, and ΔT is the difference between the real-time oil temperature and the standard reference oil temperature.

4. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to claim 1, characterized in that, The oil level calibration of the bucket wheel excavator boom at its lowest pitch angle includes: Control the bucket wheel excavator's boom to its lowest pitch angle and maintain a stable state; Under the stable condition, the oil level in the tank is recorded as the reference oil level; The reference oil level is compared with the oil level protection setting set by the system to dynamically correct the oil level protection setting and ensure the effectiveness of the oil level protection setting under extreme working conditions of the equipment.

5. The method for protecting the oil tank of a bucket wheel excavator according to claim 4, characterized in that, The step of correlating and comparing the reference oil level with the system-set oil level protection value includes: Set the reference oil level to the new oil level protection setting under the current operating conditions; or... Calculate the deviation between the reference oil level and the theoretical oil level, and compensate the preset oil level protection setting based on the deviation.

6. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to claim 5, characterized in that, The step of compensating for the offset of the preset oil level protection setting based on the deviation includes: The difference between the reference oil level and the corresponding theoretical oil level is used as the offset. The offset is superimposed on the preset original oil level protection setting to generate the calibrated final oil level protection setting.

7. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to claim 1, characterized in that, The issuance of the alarm signal includes: Based on the rate of oil level drop when the corrected oil level value is lower than the oil level protection setting, different levels of alarm signals are triggered. Specifically, when the oil level is below the protection setpoint but is in a slow decline phase, a Level 1 warning signal is triggered; when the oil level is below the protection setpoint and is in a rapid decline phase, a Level 2 emergency alarm signal is triggered.

8. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to any one of claims 1-7, characterized in that, Also includes: Record historical oil level data and generate oil level change trend curves; Before the corrected oil level value triggers the protection action, if the analysis of the oil level change trend curve indicates that the oil level has a continuous abnormal downward trend, a maintenance warning signal will be issued in advance.

9. The method for protecting the oil tank of a bucket wheel excavator from oil leakage according to any one of claims 1-7, characterized in that, Following the triggering of the protection action, the following is also included: Maintain the alarm signal and lock the automatic start function of the oil pump; The alarm will be deactivated and the system will be reset only after the operator confirms the reset command on-site and enters it manually.

10. A bucket wheel excavator oil tank leakage protection system, characterized in that, include: The data acquisition module is used to collect real-time data on the oil level and oil temperature of the bucket wheel excavator's oil tank. The compensation module is used to perform temperature compensation on the oil level data based on the oil temperature data to obtain a corrected oil level value; The setting module is used to set the oil level protection setpoint. The setting process of the oil level protection setpoint includes: based on the initial oil level after refueling, combined with oil temperature compensation and oil level calibration of the bucket wheel excavator boom at the lowest pitch angle, the oil level drop threshold is comprehensively determined as the oil level protection setpoint. The comparison module is used to compare the corrected oil level value with the oil level protection setting value in real time; The protection module is used to trigger a protection action when the corrected oil level value is lower than the oil level protection setpoint. The protection action includes cutting off the oil pump power supply and issuing an alarm signal.

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