A method and device for early warning of pressure of lubricating oil system of coal mill in coal-fired power plant

Abstract

The present invention proposes a method, device, equipment, and storage medium for early warning of the pressure of the lubricating oil system of a coal-fired power plant mill. The method collects and analyzes relevant historical data of the lubricating oil system of the coal-fired power plant mill to determine key indicators and parameters that affect the operating status of the system. By processing and calculating the relevant operating data, representative values ​​are obtained. By monitoring the representative values ​​of the key indicators of the lubricating oil system of the coal-fired power plant mill, the operating characteristics of the lubricating oil system of the coal-fired power plant mill can be reflected, helping operators to deal with them in a timely manner and achieve the effect of preventing problems before they occur. The calculation method of multiple change rates and the monitoring of real-time values ​​improve the accuracy of identifying abnormal operating conditions in which the pressure continues to drop. In addition, the operating status of the lubricating oil system of the coal-fired power plant mill can be monitored and evaluated in real time, providing a basis for adjusting the operating parameters of the pulverizing system. Through the present invention, oil pressure anomalies can be detected in a timely manner during the operation of the lubricating oil system of the coal-fired power plant mill, and manual intervention can be carried out quickly to ensure the safe and stable operation of the pulverizing system of the coal-fired power plant mill.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation optimization, and in particular to a pressure early warning method, device, equipment and storage medium for a lubricating oil system of a coal-fired power plant coal mill. Background Art

[0002] The coal mill is a crucial component of the coal-fired power plant's pulverizing system, primarily used to crush and grind coal into pulverized coal. Its grinding section consists primarily of a rotating grinding ring and a fixed, self-rotating grinding roller that rotates along the ring. All of these supporting devices require specialized lubricating oil. The coal mill's lubricating oil system cools and lubricates the gears and bearings in the mill's reducer, ensuring the mill's proper operation. During normal operation, the motor-driven screw pump draws lubricating oil from the mill's reducer lower housing, sending it to a heater, where it flows through a pipeline into a filter cartridge in a dual-chamber filter. The oil then flows along the pipeline to a cooler, where it is delivered to various lubrication points.

[0003] When the coal mill lubricating oil system is running, when the abnormal condition of lubricating oil pressure continuously decreasing occurs, it is difficult for the monitoring personnel to detect the oil pressure abnormality in time due to its slow change, which leads to delayed manual intervention and affects the safe and stable operation of the pulverizing system. Summary of the Invention

[0004] The present invention provides a method, device, equipment and storage medium for early warning of the pressure of the lubricating oil system of a coal-fired power plant, which aims to promptly detect abnormal oil pressure during the operation of the lubricating oil system of the coal-fired power plant, quickly perform manual intervention, and ensure the safe and stable operation of the coal-fired power plant pulverizing system;

[0005] To this end, the purpose of the present invention is to provide a coal-fired power plant coal mill lubricating oil system pressure early warning method, comprising:

[0006] Monitor the change of the oil pressure at the inlet of the coal mill oil distributor, and collect the oil pressure data of the inlet of the coal mill oil distributor in a preset first time period;

[0007] When the coal mill is in operation, obtaining the oil pressure data of the coal mill oil distributor inlet in a preset first time period and performing data preprocessing;

[0008] Based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, determining whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet;

[0009] If the answer is yes, the warning information of the continuous drop in the pressure of the coal mill lubricating oil system will be pushed to the operator monitoring platform, and fault handling measures will be proposed.

[0010] When the coal mill is in operation, the oil pressure data at the inlet of the coal mill oil distributor is obtained for a preset time period, and data preprocessing is performed, including:

[0011] Acquire the oil pressure data at the inlet of the coal mill oil distributor for a preset first time period, and take the oil pressure data at the inlet of the coal mill oil distributor within a preset second time period before the acquisition moment among the oil pressure data at the inlet of the coal mill oil distributor for the preset first time period as the preprocessed oil pressure data at the inlet of the coal mill oil distributor for the preset first time period;

[0012] Real-time monitoring of the operating signals of the two-speed motors of the coal mill thin oil station. When it is monitored that at least one of the two-speed motors of the coal mill thin oil station is in operation, it is determined that the coal mill lubricating oil system is in operation. The pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period is used as the coal mill lubricating oil system pressure early warning judgment data.

[0013] Wherein, judging whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the inlet of the coal mill oil distributor based on the pre-processed oil pressure data of the coal mill oil distributor in the preset first time period includes:

[0014] Determine whether there is data less than a preset lower alarm limit in the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period, and if so, generate a warning message;

[0015] Based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, a method for judging the intermediate rate of change is used to determine whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet;

[0016] Based on the pre-processed oil pressure data of the coal mill oil distributor inlet in the preset first time period, the first-to-last change rate judgment method is used to determine whether the coal mill oil distributor inlet has an abnormal operating condition of continuously decreasing lubricating oil pressure.

[0017] Among them, based on the pre-processed oil pressure data of the coal mill oil distributor inlet in the preset first time period, the intermediate change rate judgment method is used to judge whether the coal mill oil distributor inlet has an abnormal operating condition of continuous decrease in lubricating oil pressure, including:

[0018] Determine whether all the pre-processed coal mill oil distributor inlet oil pressure data in the preset first time period are less than the preset warning boundary value;

[0019] If the answer is yes, then the oil pressure data of n characteristic moments at the same time interval are selected from the pre-processed oil pressure data of the coal mill oil distributor in the preset first time period in chronological order, and the first oil pressure change rate between adjacent characteristic moments is calculated;

[0020] If, among the calculated n-1 first oil pressure change rates, the number of first oil pressure change rates that are higher than the alarm change rate exceeds or equals the set alarm number, it is determined that an abnormal operating condition has occurred in which the lubricating oil pressure at the coal mill oil distributor inlet continues to drop.

[0021] Among them, based on the pre-processed oil pressure data of the coal mill oil distributor inlet in the preset first time period, the first and last change rate judgment method is used to judge whether the coal mill oil distributor inlet has an abnormal operating condition of continuously decreasing lubricating oil pressure, including:

[0022] Take the same number of oil pressure data at the beginning and end of the coal mill oil distributor inlet oil pressure data sorted by time from the pre-processed preset first time period;

[0023] Compare each oil pressure data in the end oil pressure data with the corresponding oil pressure data in the head end oil pressure data in chronological order, and obtain the same number of oil pressure change values ​​as the oil pressure data at the head and the tail ends;

[0024] When the number of oil pressure change values ​​that are higher than the alarm change value exceeds or equals the set number, it is determined that an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the inlet of the coal mill oil distributor.

[0025] Among them, the oil pressure data of the pulverizer oil distributor inlet in the preset first time period after preprocessing are taken, and the oil pressure data of the same number at the first and last ends sorted by time are selected. The characteristic oil pressure of the pulverizer oil distributor inlet at the first end for 1 minute per second and the characteristic oil pressure of the pulverizer oil distributor inlet at the last end for 1 minute per second in the first preset time period are selected, and the characteristic oil pressure value per second in the last 1 minute is subtracted one by one from the corresponding characteristic oil pressure value per second in the first end for 1 minute, to obtain 60 oil pressure change values.

[0026] Among them, the lower alarm value is 0.12MPa and the warning boundary value is 0.2MPa.

[0027] In addition, the present invention also aims to provide a pressure warning device for a lubricating oil system of a coal-fired power plant coal mill, comprising:

[0028] The pressure acquisition module is used to monitor the change of the oil pressure at the inlet of the coal mill oil distributor and collect the oil pressure data of the inlet of the coal mill oil distributor in a preset first time period;

[0029] A data selection control module is used to obtain the oil pressure data of the coal mill oil distributor inlet during a preset first time period when the coal mill is in operation, and to perform data preprocessing;

[0030] a data processing module for determining whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the inlet of the coal mill oil distributor based on pre-processed oil pressure data of the inlet of the coal mill oil distributor during a preset first time period;

[0031] The early warning information push module is used to push the early warning information of the continuous drop in the pressure of the coal mill lubricating oil system to the operator monitoring platform and propose fault handling measures.

[0032] The present invention also aims to provide a computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method of any one of the aforementioned technical solutions is implemented.

[0033] Another object of the present invention is to provide a non-temporary computer-readable storage medium having a computer program stored thereon, which implements the method of the aforementioned technical solution when the computer program is executed by a processor.

[0034] Different from the existing technology, the present invention provides a coal-fired power plant mill lubricating oil system pressure early warning method. By collecting and analyzing relevant historical data of the mill lubricating oil system, the key indicators and parameters that affect the system's operating status are determined, and representative values ​​are obtained by processing and calculating relevant operating data. By monitoring the representative values ​​of the key indicators of the mill lubricating oil system, the operating characteristics of the mill lubricating oil system can be reflected, helping operators to deal with them in a timely manner and achieve the effect of preventing problems before they occur. By calculating multiple change rates and monitoring real-time values, the accuracy of identifying abnormal operating conditions where pressure continues to drop is improved, and the operating status of the mill lubricating oil system can be monitored and evaluated in real time, providing a basis for adjusting the operating parameters of the pulverizing system. Through the present invention, oil pressure anomalies can be discovered in a timely manner during the operation of the mill lubricating oil system, and manual intervention can be quickly carried out to ensure the safe and stable operation of the pulverizing system of the coal-fired power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 The present invention provides a flow chart of a method for early warning of the pressure of a lubricating oil system of a coal-fired power plant coal mill.

[0037] Figure 2 The present invention provides a structural diagram of a pressure early warning device for a lubricating oil system of a coal-fired power plant coal mill.

[0038] Figure 3 It is a structural schematic diagram of a non-transitory computer-readable storage medium storing computer instructions provided by the present invention. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0040] A method for early warning of the pressure of a lubricating oil system of a coal-fired power plant pulverizer according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] Figure 1 This is a flow chart of a method for early warning the pressure of the lubricating oil system of a coal-fired power plant mill provided by an embodiment of the present invention. The steps for implementing the method are as follows:

[0042] Step 110: monitor the change of the oil pressure at the inlet of the coal mill oil distributor, and collect the oil pressure data of the inlet of the coal mill oil distributor in a preset first time period.

[0043] Specifically, the coal mill involved in the present invention includes three oil distributors. Sensors and other equipment monitor the oil pressure changes at the inlet of each oil distributor in real time, and collect oil pressure data at the inlet of each oil distributor for a preset first time period: "Oil pressure 1 at the inlet of the coal mill oil distributor," "Oil pressure 2 at the inlet of the coal mill oil distributor," and "Oil pressure 3 at the inlet of the coal mill oil distributor." In the present invention, the preset first time period is set to 660 seconds.

[0044] Step 120: When the coal mill is in operation, obtain the oil pressure data at the inlet of the coal mill oil distributor in a preset first time period and perform data preprocessing.

[0045] In this step, oil pressure data at the inlet of the coal mill oil distributor is obtained for a preset first time period. Of the oil pressure data at the inlet of the coal mill oil distributor for the preset first time period, the oil pressure data at the inlet of the coal mill oil distributor within a preset second time period before the acquisition is taken as the preprocessed oil pressure data at the inlet of the coal mill oil distributor for the preset first time period. In the present invention, the length of the preset second time period should be less than or equal to the length of the preset first time period. In this embodiment, the length of the second time period is 660 seconds, the same as the length of the first time period.

[0046] Real-time monitoring of the operation signal of the two-speed motor of the coal mill thin oil station is carried out. When at least one of the two-speed motors of the coal mill thin oil station is monitored to be in operation, that is, at least one of the signals "coal mill thin oil station two-speed motor A is running" or "coal mill thin oil station two-speed motor B is running" is in the running state, it is determined that the coal mill lubricating oil system is in operation, and the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period is used as the coal mill lubricating oil system pressure early warning judgment data.

[0047] Step 130: Based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, determine whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet.

[0048] For the received pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period, the following processing is performed in this step:

[0049] The oil pressure data at the inlet of the coal mill oil distributor in the first preset time period after preprocessing is judged to be less than a preset lower limit alarm value. If so, an early warning message is generated. The lower limit alarm value in the present invention is 0.12 MPa.

[0050] If there is no data less than the preset lower alarm value, the following steps are further performed:

[0051] Based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, the intermediate change rate judgment method is used to determine whether the coal mill oil distributor inlet has an abnormal operating condition of continuously decreasing lubricating oil pressure. Specifically, it includes:

[0052] It is determined whether all the pre-processed coal mill oil distributor inlet oil pressure data in the preset first time period are less than a preset warning boundary value, the warning boundary value being 0.2 MPa.

[0053] If the judgment is yes, then from the pre-processed preset first time period oil pressure data of the coal mill oil distributor inlet, select the oil pressure data of n characteristic moments with the same time interval in chronological order, and calculate the first oil pressure change rate between adjacent characteristic moments.

[0054] In this embodiment, the median of "coal mill oil distributor inlet oil pressure 1", "coal mill oil distributor inlet oil pressure 2" and "coal mill oil distributor inlet oil pressure 3" at 11 characteristic moments, namely 600 seconds, 540 seconds, 480 seconds, 420 seconds, 360 seconds, 300 seconds, 240 seconds, 180 seconds, 120 seconds, 60 seconds before the current moment and the current moment, is calculated.

[0055] The medians of "coal mill oil distributor inlet oil pressure 1", "coal mill oil distributor inlet oil pressure 2", and "coal mill oil distributor inlet oil pressure 3" at the 11 characteristic moments are subtracted in sequence to obtain the oil pressure change rate between each characteristic moment, a total of 10, as the first oil pressure change rate.

[0056] If, among the calculated n-1 first oil pressure change rates, the number of first oil pressure change rates that are higher than the alarm change rate exceeds or equals the set alarm number, it is determined that an abnormal operating condition has occurred in which the lubricating oil pressure at the coal mill oil distributor inlet continues to drop.

[0057] When the alarm change rate is set to 0.001 MPa / min, the alarm number is set to 7. That is, if the calculated first oil pressure change rate has a value higher than the set alarm change rate of 0.001 MPa / min and the number of alarms exceeds 7, it is determined to be abnormal.

[0058] In other embodiments of the present invention, when the alarm change rate is set to 0.002 MPa / min, the alarm number is set to 3; that is, in the calculated first oil pressure change rate, when the number of values ​​higher than the set alarm change rate of 0.002 MPa / min is higher than the alarm number 3, it is judged as abnormal.

[0059] At the same time, the present invention also needs to judge the initial and final change rate. Based on the pre-processed oil pressure data of the coal mill oil distributor inlet in the preset first time period, the initial and final change rate judgment method is used to determine whether the coal mill oil distributor inlet has an abnormal operating condition of continuously decreasing lubricating oil pressure. Specifically, it includes:

[0060] The same number of oil pressure data at the beginning and end of the coal mill oil distributor inlet in the first preset time period are obtained by sorting by time.

[0061] Specifically, calculate the minimum value of "Coal Mill Oil Distributor Inlet Oil Pressure 1", "Coal Mill Oil Distributor Inlet Oil Pressure 2", and "Coal Mill Oil Distributor Inlet Oil Pressure 3" per second in the first minute (the first 660 seconds to the first 600 seconds) of the 660-second data set, and the minimum value of "Coal Mill Oil Distributor Inlet Oil Pressure 1", "Coal Mill Oil Distributor Inlet Oil Pressure 2", and "Coal Mill Oil Distributor Inlet Oil Pressure 3" per second in the last minute (the first 60 seconds to the current moment).

[0062] In chronological order, each oil pressure data in the end oil pressure data is compared with the corresponding oil pressure data in the head end oil pressure data to obtain the same number of oil pressure change values ​​as the head and tail end oil pressure data.

[0063] Compare the minimum values ​​of "mill oil distributor inlet oil pressure 1", "mill oil distributor inlet oil pressure 2" and "mill oil distributor inlet oil pressure 3" per second in the first minute (660 seconds to 600 seconds) with the minimum values ​​of "mill oil distributor inlet oil pressure 1", "mill oil distributor inlet oil pressure 2" and "mill oil distributor inlet oil pressure 3" per second in the last minute (60 seconds to the present moment), subtract the oil pressure value of the first minute from the oil pressure value of the last minute one by one, and obtain the oil pressure change in the last minute compared with 10 minutes ago, and obtain a total of 60 change rates.

[0064] When the number of oil pressure change values ​​that are higher than the alarm change value exceeds or equals the set number, it is determined that an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the inlet of the coal mill oil distributor.

[0065] Among them, the alarm change value is 0.01MPa / 10min, and the set alarm number is 60.

[0066] Step 140: If the answer is yes, the warning information of the continuous drop in the pressure of the coal mill lubricating oil system is pushed to the operator monitoring platform, and fault handling measures are proposed.

[0067] like Figure 2 As shown, the present invention also provides a pressure early warning device for a lubricating oil system of a coal-fired power plant coal mill, comprising:

[0068] The pressure acquisition module 001 is used to monitor the oil pressure change at the inlet of the coal mill oil distributor and collect the oil pressure data at the inlet of the coal mill oil distributor during a preset first time period;

[0069] The data selection control module 002 is used to obtain the oil pressure data of the coal mill oil distributor inlet during a preset first time period when the coal mill is in operation, and perform data preprocessing;

[0070] The data processing module 003 is used to determine whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the inlet of the coal mill oil distributor based on the pre-processed oil pressure data of the inlet of the coal mill oil distributor during a preset first time period;

[0071] The early warning information push module 004 is used to push the early warning information of the continuous drop in the pressure of the coal mill lubricating oil system to the operator monitoring platform and propose fault handling measures.

[0072] Specifically, during the early warning process, the device

[0073] The pressure acquisition module 001 mainly monitors the changes in the oil pressure at the inlet of the coal mill oil distributor, and transmits the data of "coal mill oil distributor inlet oil pressure 1", "coal mill oil distributor inlet oil pressure 2", and "coal mill oil distributor inlet oil pressure 3" for 660 seconds to the data selection control module 002;

[0074] The data selection control module 002 mainly includes a data selection function block 00201 and a coal mill thin oil station dual-speed motor operation judgment block 00202.

[0075] In order to ensure the accuracy of the early warning information and enable the model to obtain the required data, the data selection control module 002 selects the data collected by the pressure acquisition module 001 through the data selection function block 00201, and obtains the operation data of 660 seconds before the current moment, and then monitors the operation signal of the two-speed motor of the coal mill oil station in real time through the coal mill oil station two-speed motor operation judgment block 00202. When at least one of the "coal mill oil station two-speed motor A running" or "coal mill oil station two-speed motor B running" signals is in the running state, it means that at least one coal mill oil station two-speed motor in the system is put into operation, it can be determined that the coal mill lubricating oil system is put into operation, and the selected data can be transmitted to the data processing module 003.

[0076] The data processing module 003 mainly processes the data output by the data selection control module 002 and determines whether an abnormal working condition of continuous drop in lubricating oil pressure occurs and transmits the result to the early warning information push module 004.

[0077] The data processing module 003 includes an intermediate change rate processing module 00301 and a first and last change rate processing module 00302 .

[0078] The collected data are judged and calculated step by step. First, it is determined whether the data of the mill oil distributor inlet oil pressure collected by the pressure acquisition module 001 contains data less than the lower alarm value in the data set. If the judgment is true, the information is directly output to the early warning information push module 004. If the judgment is false, it is determined whether all the data sets are less than the early warning boundary value. If the judgment is true, the intermediate change rate processing module 00301 starts to calculate the median of "mill oil distributor inlet oil pressure 1", "mill oil distributor inlet oil pressure 2" and "mill oil distributor inlet oil pressure 3" at a total of 11 characteristic moments, namely 600 seconds, 540 seconds, 480 seconds, 420 seconds, 360 seconds, 300 seconds, 240 seconds, 180 seconds, 120 seconds, 60 seconds before the current moment and the current moment. Subtract the medians of "coal mill oil distributor inlet oil pressure 1", "coal mill oil distributor inlet oil pressure 2", and "coal mill oil distributor inlet oil pressure 3" at the 11 characteristic moments in turn to obtain the oil pressure change rate between each characteristic moment, a total of 10. When the number of times the oil pressure change rate between characteristic moments exceeds the alarm change rate exceeds or equals the set alarm number, the information is output to the early warning information push module 004;

[0079] At the same time, the first and last change rate processing module 00302 calculates the minimum value of "coal mill oil distributor inlet oil pressure 1", "coal mill oil distributor inlet oil pressure 2", and "coal mill oil distributor inlet oil pressure 3" per second in the first minute (the first 660 seconds to the first 600 seconds) of the 660-second data set, and the minimum value of "coal mill oil distributor inlet oil pressure 1", "coal mill oil distributor inlet oil pressure 2", and "coal mill oil distributor inlet oil pressure 3" per second in the last minute (the first 60 seconds to the current moment). Compare the minimum values ​​of "mill oil distributor inlet oil pressure 1", "mill oil distributor inlet oil pressure 2" and "mill oil distributor inlet oil pressure 3" per second in the first minute (the first 660 seconds to the first 600 seconds) with the minimum values ​​of "mill oil distributor inlet oil pressure 1", "mill oil distributor inlet oil pressure 2" and "mill oil distributor inlet oil pressure 3" per second in the last minute (the first 60 seconds to the current moment), subtract the oil pressure values ​​of the first minute from the oil pressure values ​​of the last minute one by one, and obtain the oil pressure change in the last minute compared with 10 minutes ago, and obtain a total of 60 change rates. When the number of oil pressure change rates higher than the alarm change rate exceeds or equals the set number, the information is output to the early warning information push module 004.

[0080] The early warning information push module 004 pushes the early warning information of whether the pressure of the coal mill lubricating oil system continues to drop to the operator monitoring platform according to the results transmitted by the data processing module (003), and proposes fault handling measures.

[0081] In order to implement the embodiment, the present invention also proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute each step of the coal-fired power plant mill lubricating oil system pressure early warning method of the aforementioned technical solution.

[0082] like Figure 3 As shown, the non-transitory computer-readable storage medium includes a memory 810 of instructions and an interface 830. The instructions can be executed by a processor 820 based on the pressure warning of the coal mill lubricating oil system of the coal-fired power plant to complete the method. Alternatively, the storage medium can be a non-transitory computer-readable storage medium, for example, a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0083] In order to implement the embodiment, the present invention also proposes a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, it realizes the coal-fired power plant mill lubricating oil system pressure warning as in the embodiment of the present invention.

[0084] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0086] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0087] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0088] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0089] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0090] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0091] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present invention. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for early warning of the lubricating oil system pressure of a coal-fired power plant mill, characterized in that: include: Monitor the change of the oil pressure at the inlet of the coal mill oil distributor, and collect the oil pressure data of the inlet of the coal mill oil distributor in a preset first time period; When the coal mill is in operation, obtaining the oil pressure data at the inlet of the coal mill oil distributor in the preset first time period and performing data preprocessing; Based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, determining whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet; If the answer is yes, the warning message of the continuous drop in the lubricating oil system pressure of the coal mill will be pushed to the operator monitoring platform, and fault handling measures will be proposed; The determining, based on the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period, whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet, includes: Determining whether the pre-processed coal mill oil distributor inlet oil pressure data for the preset first time period contains data that is less than a preset lower alarm value, and if so, generating a warning message; Based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, a method for determining the intermediate rate of change is used to determine whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet. The method includes: determining whether all the oil pressure data of the coal mill oil distributor inlet in the pre-processed first time period are less than a preset warning boundary value; If the answer is yes, then selecting the oil pressure data of n characteristic moments at the same time interval from the pre-processed oil pressure data of the coal mill oil distributor in the preset first time period in chronological order, and calculating the first oil pressure change rate between adjacent characteristic moments; If, among the calculated n-1 first oil pressure change rates, the number of first oil pressure change rates that are higher than the alarm change rate exceeds or equals the set alarm number, it is determined that an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet; Based on the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period, a method for judging the first and last change rates is used to determine whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet, which includes: obtaining the same number of oil pressure data at the first and last ends of the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period, which are sorted by time; Compare each oil pressure data in the end oil pressure data with the corresponding oil pressure data in the head end oil pressure data in chronological order, and obtain the same number of oil pressure change values ​​as the oil pressure data at the head and the tail ends; When the number of oil pressure change values ​​that are higher than the alarm change value exceeds or equals the set number among all the oil pressure change values, it is determined that an abnormal operating condition occurs in which the lubricating oil pressure at the coal mill oil distributor inlet continues to drop.

2. The method for early warning of the lubricating oil system pressure of a coal-fired power plant coal mill according to claim 1, characterized in that: When the coal mill is in operation, obtaining the coal mill oil distributor inlet oil pressure data for the preset time period and performing data preprocessing includes: Acquire the oil pressure data at the inlet of the coal mill oil distributor for the preset first time period, and take the oil pressure data at the inlet of the coal mill oil distributor within a preset second time period before the acquisition moment among the oil pressure data at the inlet of the coal mill oil distributor for the preset first time period as the preprocessed oil pressure data at the inlet of the coal mill oil distributor for the preset first time period; The operation signal of the two-speed motor of the coal mill thin oil station is monitored in real time. When it is monitored that at least one two-speed motor of the coal mill thin oil station is put into operation, it is determined that the coal mill lubricating oil system is put into operation, and the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period is used as coal mill lubricating oil system pressure early warning judgment data.

3. The method for early warning of the lubricating oil system pressure of a coal-fired power plant coal mill according to claim 1, characterized in that: The method comprises taking the oil pressure data of the coal mill oil distributor inlet of the pre-processed preset first time period and the oil pressure data of the same number at the first and last ends sorted by time, selecting the characteristic oil pressure of the coal mill oil distributor inlet at the first end for 1 minute per second and the characteristic oil pressure of the coal mill oil distributor inlet at the last end for 1 minute per second within the first preset time period, and subtracting the characteristic oil pressure value per second at the last end for 1 minute from the corresponding characteristic oil pressure value per second at the first end for 1 minute one by one to obtain 60 oil pressure change values.

4. The pressure warning device for the lubricating oil system of a coal-fired power plant coal mill according to claim 1 is characterized in that: The lower limit alarm value is 0.12 MPa, and the warning boundary value is 0.2 MPa.

5. A method for early warning of the lubricating oil system pressure of a coal-fired power plant mill, characterized in that: include: The pressure acquisition module is used to monitor the change of the oil pressure at the inlet of the coal mill oil distributor and collect the oil pressure data of the inlet of the coal mill oil distributor in a preset first time period; a data selection control module, configured to obtain the oil pressure data at the inlet of the coal mill oil distributor during the preset first time period when the coal mill is in operation, and perform data preprocessing; a data processing module, configured to determine whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the inlet of the coal mill oil distributor based on the pre-processed oil pressure data at the inlet of the coal mill oil distributor during the preset first time period; The early warning information push module is used to push early warning information of the continuous drop in the pressure of the coal mill lubricating oil system to the operator monitoring platform and propose fault handling measures; The data processing module is further configured to determine whether the pre-processed coal mill oil distributor inlet oil pressure data for the preset first time period contains data that is less than a preset lower alarm limit value, and if so, generate an early warning message; an intermediate change rate processing module, configured to determine, based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet by using an intermediate change rate determination method; a first-end change rate processing module for determining, based on the pre-processed oil pressure data of the coal mill oil distributor inlet during the preset first time period, whether an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet by using a first-end change rate determination method; The intermediate change rate processing module is further used to determine whether all the pre-processed coal mill oil distributor inlet oil pressure data in the preset first time period are less than a preset warning boundary value; If the answer is yes, then selecting the oil pressure data of n characteristic moments at the same time interval from the pre-processed oil pressure data of the coal mill oil distributor in the preset first time period in chronological order, and calculating the first oil pressure change rate between adjacent characteristic moments; If, among the calculated n-1 first oil pressure change rates, the number of first oil pressure change rates that are higher than the alarm change rate exceeds or equals the set alarm number, it is determined that an abnormal operating condition of a continuous decrease in lubricating oil pressure occurs at the coal mill oil distributor inlet; The first and last change rate processing module is further used to obtain the same number of oil pressure data at the first and last ends of the pre-processed coal mill oil distributor inlet oil pressure data of the preset first time period; Compare each oil pressure data in the end oil pressure data with the corresponding oil pressure data in the head end oil pressure data in chronological order, and obtain the same number of oil pressure change values ​​as the oil pressure data at the head and the tail ends; When the number of oil pressure change values ​​that are higher than the alarm change value exceeds or equals the set number among all the oil pressure change values, it is determined that an abnormal operating condition occurs in which the lubricating oil pressure at the coal mill oil distributor inlet continues to drop.

6. A computer device, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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