An automatic cover device for the fan hoisting opening and its maintenance monitoring method

Abstract

This application relates to the technical field of fan hoist opening covers, and particularly to an automatic cover device for a fan hoist opening and its maintenance monitoring method. It includes: presetting a primary monitoring mode and a secondary monitoring mode, and setting multiple monitoring points and monitoring characteristic values according to the fan hoist opening; setting the monitoring mode according to the internal maintenance task. If there is an internal maintenance task, the monitoring mode is set to the secondary monitoring mode. If there is no internal maintenance task, the monitoring mode is set to the primary monitoring mode; when the monitoring mode is the primary monitoring mode, obtain the monitoring characteristic values of the monitoring points according to the preset monitoring time nodes, and judge whether to generate a maintenance instruction; when the monitoring mode is the secondary monitoring mode, obtain the status parameters of the cover according to the preset feedback time nodes and judge whether to generate a warning instruction. By establishing a two-level monitoring mode, when the risk of abnormal opening of the cover is found, maintenance is carried out in a timely manner to avoid affecting the normal operation of the fan and ensure the overall operation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of fan hoisting opening covers, and particularly to an automatic cover device for a fan hoisting opening and a maintenance monitoring method therefor. Background Art

[0002] Regular inspection of the fan nacelle is necessary to ensure safety, prevent failures, improve performance, extend lifespan, and conduct data analysis and optimization. Inspections can promptly detect and solve problems, ensuring the normal operation and efficient power generation of the fan. The main inspection methods are manual visual inspection, drone inspection, remote sensing technology inspection, and data collection and analysis. Among them, remote sensing technology inspection and data collection and analysis are costly, highly specialized, and difficult to operate.

[0003] However, the most commonly used visual inspection and drone inspection involve personnel and drones entering the interior of the nacelle. The fan nacelle is usually located at a high altitude or in a difficult-to-reach location. There is a hoisting opening above the nacelle, which serves not only as a hoisting passage for the crane wire rope and a maintenance inspection passage but also as an escape route in case of a fire in the fan. During the maintenance process of the fan, fires have caused a high proportion of deaths in the wind power industry. There is no targeted warning device for the opening and closing of the hoisting opening cover, resulting in staff being unable to accurately determine whether the hoisting opening cover is fully opened and closed and remains stable, posing risks and easily causing casualties. Summary of the Invention

[0004] The purpose of the present application is: To solve the above technical problems, the present application provides an automatic cover device for a fan hoisting opening and a maintenance monitoring method therefor.

[0005] In some embodiments of the present application, by establishing a two-level monitoring mode, the first-level monitoring mode is adopted when no one enters the nacelle to conduct routine monitoring of the cover of the hoisting opening. When it is found that there is a risk of abnormal opening of the cover, maintenance is carried out in a timely manner to avoid affecting the normal operation of the fan and ensure the overall operation efficiency.

[0006] In some embodiments of the present application, when personnel enter the nacelle for maintenance, the second-level monitoring mode is adopted to real-time feedback the state of the hoisting opening cover. When there is a risk of abnormal opening, a warning instruction is generated in a timely manner to promptly remind the maintenance personnel of the risk and avoid the risk of staff falling from the hoisting opening. Improve the safety of the maintenance process.

[0007] In some embodiments of the present application, a maintenance monitoring method for an automatic cover device of a fan hoisting opening is provided, including:

[0008] Presetting the first-level monitoring mode and the second-level monitoring mode, and setting multiple monitoring points and monitoring characteristic values according to the fan hoisting opening;

[0009] Set the monitoring mode according to the internal maintenance task. When there is an internal maintenance task, set the monitoring mode to the secondary monitoring mode. When there is no internal maintenance task, set the monitoring mode to the primary monitoring mode;

[0010] When the monitoring mode is the primary monitoring mode, obtain the monitoring characteristic values of the monitoring points according to the preset monitoring time nodes, and determine whether to generate a maintenance instruction;

[0011] When the monitoring mode is the secondary monitoring mode, obtain the status parameters of the cover plate according to the preset feedback time nodes and determine whether to generate a warning instruction.

[0012] In some embodiments of the present application, the preset monitoring time nodes include:

[0013] Generate the number of opening and closing operations of the cover plate and the total running time of the cover plate according to the historical operation parameters of the cover plate;

[0014] Generate the first historical evaluation value A1 according to the number of opening and closing operations of the cover plate;

[0015] Generate the second historical evaluation value A2 according to the total running time of the cover plate;

[0016] Generate a monitoring evaluation value b according to the first historical evaluation value A1 and the second historical evaluation value A2;

[0017] b = e1*A1 + e2*A2, where e1 is a preset first weight coefficient, e2 is a preset second weight coefficient, and e1 + e2 = 1;

[0018] Set the time interval t between adjacent monitoring time nodes according to the monitoring evaluation value b.

[0019] In some embodiments of the present application, when setting the time interval t, it includes:

[0020] Preset the first monitoring evaluation value interval (B1, B2), the second monitoring evaluation value interval (B2, B3), and the third monitoring evaluation value interval (B3, B4);

[0021] If the monitoring evaluation value b is within the preset first monitoring evaluation value interval, set the time interval t to the preset first time interval T1, that is, t = T1; if the monitoring evaluation value b is within the preset second monitoring evaluation value interval, set the time interval t to the preset second time interval T2, that is, t = T2; if the monitoring evaluation value b is within the preset third monitoring evaluation value interval, set the time interval t to the preset third time interval T3, that is, t = T3; and T1 > T2 > T3.

[0022] In some embodiments of the present application, when the preset monitoring time nodes are set, it further includes:

[0023] Obtain the real-time wind speed v at the current monitoring time node;

[0024] Generate a correction coefficient n based on the real-time wind speed v, and correct the time interval t between the current monitoring time node and the next monitoring time node according to the correction coefficient n;

[0025] Preset a first wind speed interval (V1, V2), a second wind speed interval (V2, V3) and a third wind speed interval (V3, V4);

[0026] When the real-time wind speed v is within the preset first wind speed interval, set the correction coefficient n to the preset first correction coefficient n1, and the corrected time interval t = n1 * Ti (i = 1, 2, 3); when the real-time wind speed v is within the preset second wind speed interval, set the correction coefficient n to the preset second correction coefficient n2, and the corrected time interval t = n2 * Ti (i = 1, 2, 3); when the real-time wind speed v is within the preset third wind speed interval, set the correction coefficient n to the preset third correction coefficient n3, and the corrected time interval t = n3 * Ti (i = 1, 2, 3), where n3 < n2 < n1 < 1.

[0027] In some embodiments of the present application, when determining whether to generate a maintenance instruction, it includes:

[0028] Generate a monitoring eigenvalue sequence C at the current monitoring time node, C = (c1, c2... cm), where m is the number of monitoring points, and ci is the monitoring eigenvalue of the i-th monitoring point;

[0029] Establish a cover operation evaluation model, and generate an operation evaluation value d according to the cover operation evaluation model and the monitoring eigenvalue sequence C;

[0030] Preset a first operation evaluation value D1 and a second operation evaluation value D2, and D1 < D2;

[0031] When the operation evaluation value d is between the preset first operation evaluation value D1 and the second operation evaluation value D2, generate a first-level maintenance instruction;

[0032] When the operation evaluation value d is greater than the preset second operation evaluation value, generate a second-level maintenance instruction.

[0033] In some embodiments of the present application, when the monitoring mode is a two-level monitoring mode, it further includes:

[0034] Obtain the internal maintenance task duration, and set the time interval between adjacent feedback time nodes according to the internal maintenance task duration and the monitoring evaluation value b;

[0035] Obtain the real-time status parameters of the monitoring points according to the start time of the internal maintenance task and the feedback time nodes;

[0036] Establish a risk assessment model for the cover plate, and generate an initial risk assessment value f1 based on the real-time status parameters of the monitoring points and the cover plate risk assessment model;

[0037] Set a supplementary coefficient g according to the real-time wind speed v, and generate a risk assessment value f based on the initial risk assessment value f1 and the compensation coefficient g, f = g * f1;

[0038] Judge whether to generate a warning instruction according to the risk assessment value f.

[0039] In some embodiments of the present application, when setting the compensation coefficient g, it includes:

[0040] If the real-time wind speed v is in the preset first wind speed interval, set the compensation coefficient g as the preset first compensation coefficient g1, that is, g = g1; if the real-time wind speed v is in the preset second wind speed interval, set the compensation coefficient g as the preset second compensation coefficient g2, that is, g = g2; if the real-time wind speed v is in the preset third wind speed interval, set the compensation coefficient g as the preset third compensation coefficient g3, that is, g = g3; and 1 < g1 < g2 < g3.

[0041] In some embodiments of the present application, when judging whether to generate a warning instruction according to the risk assessment value f, it includes:

[0042] Preset a first risk assessment value threshold F1 and a second risk assessment value threshold F2;

[0043] If the risk assessment value f is between the first risk assessment value threshold F1 and the second risk assessment value threshold F2, generate a first-level warning instruction;

[0044] If the risk assessment value f is greater than the second risk assessment value threshold F2, generate a second-level warning instruction.

[0045] In some embodiments of the present application, a wind turbine hoist opening automatic cover plate device is provided, including:

[0046] The central control department is used to preset the first-level monitoring mode and the second-level monitoring mode;

[0047] The control department is connected to the central control department through a wireless signal, and the control department is used to control the opening and closing state of the cover plate;

[0048] The monitoring department is used to set multiple monitoring points and monitoring characteristic values.

[0049] In some embodiments of the present application, the central control department includes:

[0050] The first processing module sets the monitoring mode according to the internal maintenance task. If there is an internal maintenance task, set the monitoring mode as the second-level monitoring mode. If there is no internal maintenance task, set the monitoring mode as the first-level monitoring mode;

[0051] A second processing module. When the monitoring mode is the primary monitoring mode, the second processing module obtains the monitoring characteristic values of the monitoring points according to the preset monitoring time nodes, and determines whether to generate a maintenance instruction.

[0052] A third processing module. When the monitoring mode is the secondary monitoring mode, the third processing module obtains the status parameters of the cover plate according to the preset feedback time nodes and determines whether to generate a warning instruction.

[0053] In the embodiment of the present application, compared with the prior art, a hoisting opening automatic cover device for a fan and its maintenance monitoring method have the following beneficial effects:

[0054] By establishing a two-level monitoring mode, the primary monitoring mode is adopted when no one enters the nacelle to conduct routine monitoring of the cover plate of the hoisting opening. When it is found that there is a risk of abnormal opening of the cover plate, maintenance is carried out in a timely manner to avoid affecting the normal operation of the fan and ensure the overall operation efficiency.

[0055] When personnel enter the nacelle for maintenance, the secondary monitoring mode is adopted to real-time feedback the status of the cover plate of the hoisting opening. When there is a risk of abnormal opening, a warning instruction is generated in a timely manner to remind the maintenance personnel of the risk in a timely manner and avoid the risk of staff falling from the hoisting opening. Improve the safety of the maintenance process. Description of the Drawings

[0056] Figure 1 is a schematic flow chart of a maintenance monitoring method for a hoisting opening automatic cover device of a fan in a preferred embodiment of the embodiment of the present application. Detailed Embodiments

[0057] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0059] 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0060] In the description of this application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] As Figure 1 shown, a maintenance monitoring method for an automatic cover device of a fan lifting opening in a preferred embodiment of an embodiment of this application includes:

[0062] S101: Preset a primary monitoring mode and a secondary monitoring mode, and set a plurality of monitoring points and monitoring characteristic values according to the fan lifting opening;

[0063] S102: Set the monitoring mode according to the internal maintenance task. If there is an internal maintenance task, set the monitoring mode as the secondary monitoring mode; if there is no internal maintenance task, set the monitoring mode as the primary monitoring mode;

[0064] S103: When the monitoring mode is the primary monitoring mode, obtain the monitoring characteristic values of the monitoring points according to the preset monitoring time nodes, and determine whether to generate a maintenance instruction;

[0065] S104: When the monitoring mode is the secondary monitoring mode, obtain the state parameters of the cover according to the preset feedback time nodes and determine whether to generate a warning instruction.

[0066] Specifically, by establishing a two - level monitoring mode, the primary monitoring mode is adopted when no one enters the engine room to conduct routine monitoring of the cover of the lifting opening. When it is found that there is a risk of abnormal opening of the cover, maintenance is carried out in a timely manner. When personnel enter the engine room for maintenance, the secondary monitoring mode is adopted to real - time feedback the state of the cover of the lifting opening. When there is a risk of abnormal opening, a warning instruction is generated in a timely manner to remind the maintenance personnel of the risk in a timely manner.

[0067] Specifically, the internal maintenance task refers to the need for personnel to enter the engine room for maintenance.

[0068] Specifically, its monitoring points and monitoring characteristic values can be set according to historical operation data. The monitoring characteristic values can reflect the stability of the cover plate in the closed state. The monitoring characteristic values include, but are not limited to, the internal air leakage of the cover plate, the real-time pressure at the cover plate lock, and other parameters. The specific positions of the monitoring points can be set according to the monitoring characteristic values.

[0069] In a preferred embodiment of the present application, when presetting the monitoring time node, it includes:

[0070] Generate the number of opening and closing operations of the cover plate and the total operating time of the cover plate according to the historical operation parameters of the cover plate;

[0071] Generate the first historical evaluation value A1 according to the number of opening and closing operations of the cover plate;

[0072] Generate the second historical evaluation value A2 according to the total operating time of the cover plate;

[0073] Generate the monitoring evaluation value b according to the first historical evaluation value A1 and the second historical evaluation value A2;

[0074] b = e1*A1 + e2*A2, where e1 is the preset first weight coefficient, e2 is the preset second weight coefficient, and e1 + e2 = 1;

[0075] Set the time interval t between adjacent monitoring time nodes according to the monitoring evaluation value b.

[0076] Specifically, the value ranges of the first historical evaluation value and the second historical evaluation value are the same. The more the number of opening and closing operations of the cover plate, the greater the possibility of loosening, and the higher the corresponding first historical evaluation value. The total operating time of the cover plate refers to the total time after the cover plate is installed. The longer the time, the greater the possibility of failure risk, and the higher the corresponding second historical evaluation value.

[0077] Specifically, the first weight coefficient and the second weight coefficient can be set according to historical operation data.

[0078] Specifically, when setting the time interval t, it includes:

[0079] Preset the first monitoring evaluation value interval (B1, B2), the second monitoring evaluation value interval (B2, B3), and the third monitoring evaluation value interval (B3, B4);

[0080] If the monitoring evaluation value b is within the preset first monitoring evaluation value interval, set the time interval t as the preset first time interval T1, that is, t = T1; if the monitoring evaluation value b is within the preset second monitoring evaluation value interval, set the time interval t as the preset second time interval T2, that is, t = T2; if the monitoring evaluation value b is within the preset third monitoring evaluation value interval, set the time interval t as the preset third time interval T3, that is, t = T3; and T1 > T2 > T3.

[0081] Specifically, the larger the monitoring evaluation value is, it indicates that there is a fault in the current cover plate, and the higher the possibility of detachment is. Therefore, the time interval between adjacent monitoring time nodes corresponding thereto should also be smaller, so as to timely eliminate the fault risk of the cover plate and ensure the safe operation of the fan.

[0082] Specifically, when presetting the monitoring time nodes, it further includes:

[0083] Obtain the real-time wind speed v of the current monitoring time node;

[0084] Generate a correction coefficient n according to the real-time wind speed v, and correct the time interval t between the current monitoring time node and the next monitoring time node according to the correction coefficient n;

[0085] Preset a first wind speed interval (V1, V2), a second wind speed interval (V2, V3) and a third wind speed interval (V3, V4);

[0086] If the real-time wind speed v is within the preset first wind speed interval, set the correction coefficient n as the preset first correction coefficient n1, and the corrected time interval t = n1 * Ti (i = 1, 2, 3); if the real-time wind speed v is within the preset second wind speed interval, set the correction coefficient n as the preset second correction coefficient n2, and the corrected time interval t = n2 * Ti (i = 1, 2, 3); if the real-time wind speed v is within the preset third wind speed interval, set the correction coefficient n as the preset third correction coefficient n3, and the corrected time interval t = n3 * Ti (i = 1, 2, 3), where n3 < n2 < n1 < 1.

[0087] Specifically, the higher the real-time wind speed is, the higher the possibility that the nacelle cover plate opens when the latch is not locked. By setting the correction coefficient and dynamically adjusting the monitoring time nodes, the monitoring efficiency of the cover plate is improved.

[0088] In the preferred embodiment of the present application, when judging whether to generate a maintenance instruction, it includes:

[0089] Generate a monitoring eigenvalue sequence C of the current monitoring time node, C = (c1, c2... cm), where m is the number of monitoring points, and ci is the monitoring eigenvalue of the i-th monitoring point;

[0090] Establish a cover plate operation evaluation model, and generate an operation evaluation value d according to the cover plate operation evaluation model and the monitoring eigenvalue sequence C;

[0091] Preset a first operation evaluation value D1 and a second operation evaluation value D2, and D1 < D2;

[0092] If the operation evaluation value d is between the preset first operation evaluation value D1 and the second operation evaluation value D2, generate a first-level maintenance instruction;

[0093] If the running evaluation value d is greater than the preset second running evaluation value, a secondary maintenance instruction is generated.

[0094] Specifically, a cover running evaluation model can be established based on historical running data. The primary maintenance instruction means that when the cover is closed, it is not in an optimal running state, and there may be potential fault hazards, and the maintenance of the cover needs to be completed before the next internal maintenance task, that is, before the next time personnel enter the corresponding engine room for maintenance.

[0095] Specifically, the secondary maintenance instruction means that there is a risk of abnormal opening of the current cover, and it is necessary to immediately perform maintenance on it to eliminate the fault risk and avoid affecting the safe operation of the fan due to cover failure.

[0096] In a preferred embodiment of the present application, when the monitoring mode is the secondary monitoring mode, it further includes:

[0097] Obtain the duration of the internal maintenance task, and set the time interval between adjacent feedback time nodes according to the duration of the internal maintenance task and the monitoring evaluation value b;

[0098] Obtain the real-time status parameters of the monitoring point according to the start time of the internal maintenance task and the feedback time node;

[0099] Establish a cover risk evaluation model, and generate an initial risk evaluation value f1 according to the real-time status parameters of the monitoring point and the cover risk evaluation model;

[0100] Set a compensation coefficient g according to the real-time wind speed v, and generate a risk evaluation value f according to the initial risk evaluation value f1 and the compensation coefficient g, f = g * f1;

[0101] Judge whether to generate a warning instruction according to the risk evaluation value f.

[0102] Specifically, the cover risk evaluation model can be monitored according to historical running data.

[0103] Specifically, when there are personnel entering the engine room for maintenance, it is set to the secondary maintenance state, and the feedback time node is set according to the estimated duration of the current internal maintenance plan. At each feedback time node, the real-time cover risk evaluation value is sent to the corresponding staff terminal to give an early warning of the abnormal situation of the cover in time. Avoid the risk of falling during personnel maintenance.

[0104] Specifically, after the personnel enter the engine room, the feedback time node is set, and warning information is sent to the corresponding personnel's terminal regularly according to the feedback time node, and the sending is terminated after the personnel leave the engine room.

[0105] Specifically, when setting the compensation coefficient g, it includes:

[0106] When the real-time wind speed v is within the preset first wind speed range, the compensation coefficient g is set to the preset first compensation coefficient g1, i.e., g = g1; when the real-time wind speed v is within the preset second wind speed range, the compensation coefficient g is set to the preset second compensation coefficient g2, i.e., g = g2; when the real-time wind speed v is within the preset third wind speed range, the compensation coefficient g is set to the preset third compensation coefficient g3, i.e., g = g3; and 1 < g1 < g2 < g3.

[0107] Specifically, the compensation coefficient is set according to the real-time wind speed to dynamically correct the initial risk evaluation value, making the risk evaluation value more accurate.

[0108] Specifically, when judging whether to generate a warning instruction according to the risk evaluation value f, it includes:

[0109] A preset first risk evaluation value threshold F1 and a second risk evaluation value threshold F2;

[0110] When the risk evaluation value f is between the first risk evaluation value threshold F1 and the second risk evaluation value threshold F2, a first-level warning instruction is generated;

[0111] If the risk evaluation value f is greater than the second risk evaluation value threshold F2, a second-level warning instruction is generated.

[0112] Specifically, the first-level warning instruction means that there may be a fault risk for the current cover plate, and external personnel need to confirm it in time. The second-level warning instruction means that there is an operation risk for the current cover plate, and the maintenance personnel should evacuate in time, and only after eliminating the cover plate fault can the maintenance operation be carried out.

[0113] Based on another preferred embodiment of the inspection and monitoring method for the automatic cover device of the wind turbine hoisting opening in any one of the above preferred embodiments, in this preferred embodiment, an automatic cover device for the wind turbine hoisting opening is provided, including:

[0114] The central control department is used to preset the first-level monitoring mode and the second-level monitoring mode;

[0115] The control department is connected to the central control department through a wireless signal, and the control department is used to control the opening and closing state of the cover plate;

[0116] The monitoring department is used to set multiple monitoring points and monitoring characteristic values.

[0117] Specifically, the central control department includes:

[0118] The first processing module sets the monitoring mode according to the internal maintenance task. If there is an internal maintenance task, the monitoring mode is set to the second-level monitoring mode. If there is no internal maintenance task, the monitoring mode is set to the first-level monitoring mode;

[0119] The second processing module, when the monitoring mode is the primary monitoring mode, the second processing module obtains the monitoring characteristic values of the monitoring points according to the preset monitoring time nodes and determines whether to generate a maintenance instruction;

[0120] The third processing module, when the monitoring mode is the secondary monitoring mode, the third processing module obtains the state parameters of the cover plate according to the preset feedback time nodes and determines whether to generate a warning instruction.

[0121] According to the first concept of the present application, by establishing a two-level monitoring mode, the primary monitoring mode is adopted when no one enters the cabin, and the cover plate of the lifting hole is routinely monitored. When it is found that there is a risk of abnormal opening of the cover plate, maintenance is carried out in time to avoid affecting the normal operation of the fan and ensure the overall operation efficiency.

[0122] According to the second concept of the present application, when personnel enter the cabin for maintenance, the secondary monitoring mode is adopted to real-time feedback the state of the cover plate of the lifting hole. When there is a risk of abnormal opening, a warning instruction is generated in time to remind the maintenance personnel of the risk in time and avoid the risk of staff falling from the lifting hole. Improve the safety of the maintenance process.

[0123] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. A maintenance monitoring method for an automatic cover device of a fan hoisting opening, characterized in that, Including: Presetting a primary monitoring mode and a secondary monitoring mode, and setting multiple monitoring points and monitoring characteristic values according to the hoist opening of the fan; Setting the monitoring mode according to the internal maintenance task. If there is an internal maintenance task, set the monitoring mode to the secondary monitoring mode. If there is no internal maintenance task, set the monitoring mode to the primary monitoring mode; When the monitoring mode is the primary monitoring mode, obtain the monitoring characteristic values of the monitoring points according to the preset monitoring time nodes, and determine whether to generate a maintenance instruction; When the monitoring mode is the secondary monitoring mode, obtain the status parameters of the cover plate according to the preset feedback time nodes and determine whether to generate a warning instruction; When determining whether to generate a maintenance instruction, it includes: Generating a sequence C of monitoring characteristic values at the current monitoring time node, C = (c1, c2…cm), where m is the number of monitoring points and ci is the monitoring characteristic value of the i-th monitoring point; Establishing a cover plate operation evaluation model, and generating an operation evaluation value d according to the cover plate operation evaluation model and the sequence C of monitoring characteristic values; Presetting a first operation evaluation value D1 and a second operation evaluation value D2, and D1 < D2; If the operation evaluation value d is between the preset first operation evaluation value D1 and the second operation evaluation value D2, generate a primary maintenance instruction; If the operation evaluation value d is greater than the preset second operation evaluation value, generate a secondary maintenance instruction; When the monitoring mode is the secondary monitoring mode, it further includes: Obtaining the duration of the internal maintenance task, and setting the time interval between adjacent feedback time nodes according to the duration of the internal maintenance task and the monitoring evaluation value b; Obtaining the real-time status parameters of the monitoring points according to the start time of the internal maintenance task and the feedback time nodes; Establishing a cover plate risk evaluation model, and generating an initial risk evaluation value f1 according to the real-time status parameters of the monitoring points and the cover plate risk evaluation model; Setting a compensation coefficient g according to the real-time wind speed v, and generating a risk evaluation value f according to the initial risk evaluation value f1 and the compensation coefficient g, f = g * f1; Judging whether to generate a warning instruction according to the risk evaluation value f.

2. The overhaul monitoring method of the automatic cover device for the fan lifting opening according to claim 1, characterized in that, When the preset monitoring time nodes are involved, it includes: Generating the number of opening and closing operations of the cover plate and the total operation duration of the cover plate according to the historical operation parameters of the cover plate; Generating a first historical evaluation value A1 according to the number of opening and closing operations of the cover plate; Generating a second historical evaluation value A2 according to the total operation duration of the cover plate; Generating a monitoring evaluation value b according to the first historical evaluation value A1 and the second historical evaluation value A2; b = e1 * A1 + e2 * A2, where e1 is a preset first weight coefficient, e2 is a preset second weight coefficient, and e1 + e2 = 1; Setting the time interval t between adjacent monitoring time nodes according to the monitoring evaluation value b.

3. The overhaul and monitoring method of the automatic cover device for the fan lifting opening according to claim 2, characterized in that, When setting the time interval t, it includes: Presetting a first monitoring evaluation value interval (B1, B2), a second monitoring evaluation value interval (B2, B3), and a third monitoring evaluation value interval (B3, B4); When the monitored evaluation value b is within the preset first monitored evaluation value range, the set time interval t is the preset first time interval T1, that is, t = T1; when the monitored evaluation value b is within the preset second monitored evaluation value range, the set time interval t is the preset second time interval T2, that is, t = T2; when the monitored evaluation value b is within the preset third monitored evaluation value range, the set time interval t is the preset third time interval T3, that is, t = T3; and T1 > T2 > T3.

4. The overhaul and monitoring method of the automatic cover device for the fan lifting opening according to claim 3, characterized in that, At the preset monitoring time node, it further includes: Obtain the real-time wind speed v at the current monitoring time node; Generate a correction coefficient n according to the real-time wind speed v, and correct the time interval t between the current monitoring time node and the next monitoring time node according to the correction coefficient n; Preset the first wind speed range (V1, V2), the second wind speed range (V2, V3) and the third wind speed range (V3, V4); When the real-time wind speed v is within the preset first wind speed range, set the correction coefficient n as the preset first correction coefficient n1, and the corrected time interval t = n1 * Ti (i = 1, 2, 3); when the real-time wind speed v is within the preset second wind speed range, set the correction coefficient n as the preset second correction coefficient n2, and the corrected time interval t = n2 * Ti (i = 1, 2, 3); when the real-time wind speed v is within the preset third wind speed range, set the correction coefficient n as the preset third correction coefficient n3, and the corrected time interval t = n3 * Ti (i = 1, 2, 3), where n3 < n2 < n1 < 1.

5. The overhaul monitoring method of the automatic cover device for the fan hoisting opening according to claim 4, characterized in that, When setting the compensation coefficient g, it includes: When the real-time wind speed v is within the preset first wind speed range, set the compensation coefficient g as the preset first compensation coefficient g1, that is, g = g1; when the real-time wind speed v is within the preset second wind speed range, set the compensation coefficient g as the preset second compensation coefficient g2, that is, g = g2; when the real-time wind speed v is within the preset third wind speed range, set the compensation coefficient g as the preset third compensation coefficient g3, that is, g = g3; and 1 < g1 < g2 < g3.

6. The overhaul monitoring method of the automatic cover device for the fan lifting opening according to claim 5, characterized in that When judging whether to generate a warning instruction according to the risk evaluation value f, it includes: Preset the first risk evaluation value threshold F1 and the second risk evaluation value threshold F2; When the risk evaluation value f is between the first risk evaluation value threshold F1 and the second risk evaluation value threshold F2, generate a first-level warning instruction; When the risk evaluation value f is greater than the second risk evaluation value threshold F2, generate a second-level warning instruction.

7. An automatic cover device for the fan hoisting opening, adopting the overhaul and monitoring method of the automatic cover device for the fan hoisting opening described in any one of the above claims 1-6, characterized in that, It includes: The central control department is used to preset the first-level monitoring mode and the second-level monitoring mode; The control department is wirelessly connected to the central control department, and the control department is used to control the opening and closing state of the cover plate; The monitoring department is used to set multiple monitoring points and monitoring characteristic values.

8. The automatic cover device for the fan hoisting opening according to claim 7, characterized in that The central control department includes: The first processing module sets the monitoring mode according to the internal maintenance task. If there is an internal maintenance task, set the monitoring mode as the second-level monitoring mode; if there is no internal maintenance task, set the monitoring mode as the first-level monitoring mode; The second processing module, when the monitoring mode is the first-level monitoring mode, the second processing module obtains the monitoring characteristic values of the monitoring points according to the preset monitoring time node and judges whether to generate a maintenance instruction; The third processing module, when the monitoring mode is the secondary monitoring mode, the third processing module obtains the status parameters of the cover plate according to the preset feedback time node to determine whether to generate a warning instruction.

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