Power transmission tower angle steel stability improving structure and reliability monitoring method thereof

Abstract

The invention belongs to the technical field of power equipment, and discloses a power transmission tower angle steel stability improving structure and a reliability monitoring method thereof.The power transmission tower angle steel stability improving structure comprises a D-shaped connecting piece, an L-shaped connecting piece, a gasket type pressure sensor, a sheet type pressure sensor and a reliability real-time monitoring and analyzing system; the power transmission tower angle steel is tightly attached to the L-shaped connecting piece and the D-shaped connecting piece to form a lattice type structure so as to increase the section inertia moment and the turning radius and enhance the buckling prevention capacity of the power transmission tower angle steel, and the reliability real-time monitoring and analyzing system is used for monitoring the stability of the power transmission tower angle steel stability improving structure in real time. According to the fabricated stability improving technology, field on-site welding is avoided, construction steps are simple, safety, economy and high efficiency are achieved, stability improving device components can be replaced or repaired according to requirements in the later period through bolt connection, cyclic utilization is achieved, and green and energy-saving effects are achieved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a stability enhancement structure for angle steel of transmission towers and a method for monitoring its reliability. Background Technology

[0002] As a power infrastructure, transmission towers primarily support and protect transmission lines, directly determining the safety and stability of power supply. However, transmission towers are frequently subjected to natural disasters such as wind, rain, and snow. Furthermore, some towers, due to their long service life, corrosion of steel components, or human-caused factors (construction errors, vehicle impacts, etc.), have load-bearing capacities lower than their design capacity, failing to meet normal usage requirements. Therefore, stability enhancement measures are necessary. A 2016 report first proposed vigorously developing prefabricated steel structures. Developing and promoting prefabricated steel structure construction has significant practical implications for reducing energy consumption and achieving carbon neutrality. Therefore, inventing a prefabricated stability enhancement technology is of great importance.

[0003] Currently, existing stability improvement technologies typically employ on-site welding of angle steel. This method requires extensive on-site welding work, is technically challenging, and causes severe environmental pollution, exacerbating carbon emissions. Furthermore, since power transmission towers are located in the field, welding poses a significant fire hazard, potentially causing irreversible damage to natural resources. Simultaneously, welding inflicts various harms on the material itself, including decreased mechanical properties, deterioration of metallographic structure, geometric deformation, and residual stress.

[0004] In addition, traditional stability improvement methods require drilling holes in the material itself to facilitate bolt connections. Both reinforcing angle steel and main angle steel have bolt holes drilled on their two legs. Drilling holes in steel can easily cause stress concentration and strength reduction, thus affecting the strength of the structure itself. At the same time, a major problem with bolt connections is the loosening of bolt preload.

[0005] In addition, the most commonly used method at present is to increase the bearing capacity of the solid web section. However, the solid web section has a smaller moment of inertia and radius of gyration, and its mechanical properties such as buckling resistance, ultimate bearing capacity, stiffness and toughness are relatively poor.

[0006] Therefore, how to provide a stability enhancement structure for transmission tower angle steel and its reliability monitoring method is an urgent problem to be solved. Summary of the Invention

[0007] This invention provides a stability enhancement structure for transmission tower angle steel and a reliability monitoring method thereof to solve the problems mentioned above in the prior art.

[0008] According to a first aspect of the present invention, a stability enhancement structure for transmission tower angle steel is provided.

[0009] In one embodiment, a stability enhancement structure for transmission tower angle steel includes: a D-shaped connector disposed on the concave side of the transmission tower angle steel; an L-shaped connector disposed on the convex side of the transmission tower angle steel, wherein the transmission tower angle steel, the L-shaped connector, and the D-shaped connector are tightly fitted together to form a lattice structure to increase the moment of inertia and radius of gyration of the cross section, thereby enhancing the buckling resistance of the transmission tower angle steel; bolts for connecting and fixing the D-shaped connector and the L-shaped connector; a gasket-type pressure sensor disposed between the L-shaped connector and the bolt or between the D-shaped connector and the bolt, for real-time monitoring of the bolt preload; a thin-film pressure sensor disposed between the D-shaped connector and the two flanges of the transmission tower angle steel, for real-time monitoring of the surface pressure between the D-shaped connector and the transmission tower angle steel; and a real-time reliability monitoring and analysis system electrically connected to the gasket-type pressure sensor and the thin-film pressure sensor, for real-time monitoring of the stability of the transmission tower angle steel stability enhancement structure based on the comparison results of the bolt preload and surface pressure with preset working warning values ​​and working crisis values.

[0010] In one embodiment, the D-shaped connector is composed of a straight steel plate and a C-shaped equilateral angle steel, and the straight steel plate is connected to the L-shaped connector by bolts. A thin-film pressure sensor is installed between the C-shaped equilateral angle steel and the angle steel of the transmission tower.

[0011] In one embodiment, the two ends of the L-shaped connector are bent, and the bent part is connected to the straight steel plate of the D-shaped connector by bolts, and the bent part is also parallel to the straight steel plate of the D-shaped connector.

[0012] In one embodiment, both the D-shaped connector and the L-shaped connector are arranged along the length of the angle steel of the transmission tower, and both the D-shaped connector and the L-shaped connector are made of high-entropy alloy.

[0013] In one embodiment, a gap is left between the D-shaped connector and the end edge of the transmission tower angle steel, and the size of the gap can be adjusted by fastening bolts to achieve a tight fit between the D-shaped connector and the transmission tower angle steel.

[0014] In one embodiment, the pad-type pressure sensor and the thin-film pressure sensor are arranged at the same horizontal height to monitor the tightness of the bolts at the same height and the tightness of the fit between the D-shaped connector and the angle steel of the transmission tower.

[0015] In one embodiment, both the pad-type pressure sensor and the thin-film pressure sensor are connected to the real-time reliability monitoring and analysis system via wired transmission.

[0016] In one embodiment, the D-shaped connector has several through-holes for wiring, and both the D-shaped connector and the L-shaped connector have several bolt holes on both sides for engaging with bolts.

[0017] In one embodiment, the real-time reliability monitoring and analysis system includes an energy supply module, a data acquisition module, and a data processing module, wherein the data acquisition module is electrically connected to a gasket-type pressure sensor and a thin-film pressure sensor; wherein, the energy supply module is used to provide energy to the data acquisition module and the data processing module; the data acquisition module is used to acquire the bolt preload between the L-shaped connector and the bolt and the surface pressure between the D-shaped connector and the transmission tower angle steel; the data processing module is used to evaluate the stability of the transmission tower angle steel based on the bolt preload and surface pressure.

[0018] In one embodiment, the energy supply module includes a solar panel, a charging controller, and a battery, all of which are used to provide energy to the data acquisition module and the data processing module.

[0019] In one embodiment, the data acquisition module transmits data to the data processing module in real time via wired transmission.

[0020] In one embodiment, the data processing module includes a computer, a data transmission network card, and a user remote analysis terminal. The computer is used to receive, classify, and process data from the data acquisition module to evaluate the operational reliability of the transmission tower angle steel stability improvement structure. The data transmission network card is used to wirelessly transmit the computer-processed data to a cloud platform / server. The user remote analysis terminal is used to store and relay data from the cloud platform / server, and to issue operational status reliability commands to the data transmission network card.

[0021] According to a second aspect of the present invention, a reliability monitoring method for a stability enhancement structure of an angle steel transmission tower is provided.

[0022] In one embodiment, the reliability monitoring method for the transmission tower angle steel stability enhancement structure includes:

[0023] Based on a preset interval, the bolt preload and surface pressure of the gasket-type pressure sensor and the thin-film pressure sensor are obtained to obtain several pressure data values;

[0024] Calculate the average of several pressure data values ​​and use the calculated average as the average of the daily sensor monitoring data.

[0025] Based on the comparison results of the daily average sensor monitoring data with the preset working early warning value and working crisis value, the working status and corresponding handling strategy of the transmission tower angle steel stability improvement structure are determined.

[0026] In one embodiment, the determination of preset work warning values ​​and work crisis values ​​includes:

[0027] Obtain daily pressure data values ​​within a preset number of days, remove outliers from the pressure data values, and calculate the average and standard deviation of the pressure data values ​​based on the removed pressure data values.

[0028] Based on the standard deviation of the stress data values, combined with the initial value of no loss under normal working conditions, the work warning value and work crisis value of the stress data are determined.

[0029] In one embodiment, the formula for calculating the work warning value is:

[0030] F y =F0-3F σ

[0031]

[0032] The formula for calculating the job crisis value is:

[0033] F w =F0-8F σ

[0034] In the formula, F y F0 is the initial value for normal operation without loss, and F is the warning value for work. σ Here, n represents the standard deviation, and F represents the pressure data value. j For the average value, F μ F is the expected value. i For pressure data values, F w This is a work-related crisis value.

[0035] In one embodiment, determining the working status and corresponding handling strategy of the transmission tower angle steel stability enhancement structure based on the comparison results of the daily average sensor monitoring data with preset work warning values ​​and work crisis values ​​includes:

[0036] When the average value of the daily sensor monitoring data is greater than the preset working warning value, it is determined that the stability enhancement structure of the transmission tower angle steel is in normal working condition.

[0037] When the average value of the daily sensor monitoring data is greater than the preset critical working value but less than or equal to the preset early warning value, the transmission tower angle steel stability enhancement structure is determined to be in an early warning working state, and it is suggested to strengthen monitoring and pay close attention.

[0038] When the average value of the daily sensor monitoring data is less than or equal to the preset working crisis value, the stability enhancement structure of the transmission tower angle steel is determined to be in a crisis emergency state, and it is indicated that the sensor loss value exceeds the safe range, and timely repair and control are required for the loss points.

[0039] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0040] 1) This invention uses bolts to connect and fix the D-shaped connector and the L-shaped connector, thereby avoiding on-site welding in the field. The construction steps are simple, safe, economical and efficient. The stability improvement device components can be replaced or repaired as needed through bolt connection, which is recyclable and green and energy-saving.

[0041] 2) This invention forms a lattice structure by tightly fitting the angle steel of the transmission tower with L-shaped and D-shaped connectors, which makes the material distribution more reasonable. The material arrangement is far away from the centroidal axis of the cross section, increasing the moment of inertia and radius of gyration of the cross section. Compared with the traditional solid web enlargement method, it can better avoid the instability of the components and greatly improve its load-bearing capacity.

[0042] 3) The lattice stability enhancement technology of the present invention uses a cross section that increases the ultimate bearing capacity of a solid web cross section by about 13.3% compared with the same material usage, while also improving stiffness and ductility.

[0043] 4) The L-shaped and D-shaped connectors of the present invention have a connection gap at the connection point. The L-shaped and D-shaped connectors and the transmission tower angle steel are tightly combined into a whole by the bolt pre-tightening force, which greatly improves the stability and load-bearing capacity of the transmission tower angle steel.

[0044] 5) The gasket-type pressure sensor in the M16 high-strength bolt of the present invention can monitor the bolt preload in real time, which can prevent the device from failing due to bolt loosening.

[0045] 6) The present invention uses a thin-film pressure sensor between the D-shaped connector and the two flanges of the angle steel of the transmission tower to obtain the tightness of the internal fit of the stability improvement device in real time, so as to achieve the working status early warning effect.

[0046] 7) The reliability monitoring method of the present invention analyzes the real-time monitoring data of the pressure sensor to divide the working status of the stability improvement device into normal working status, early warning status and emergency crisis status, so as to take corresponding measures according to the real-time working status to ensure that it can work normally.

[0047] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0048] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0049] Figure 1 This is a cross-sectional schematic diagram of a transmission tower angle steel stability enhancement structure according to an exemplary embodiment;

[0050] Figure 2This is a three-dimensional assembly schematic diagram of a stability enhancement structure for a transmission tower angle steel, according to an exemplary embodiment.

[0051] Figure 3 This is a schematic diagram of a D-shaped connector for a stability enhancement structure of an angle steel transmission tower, according to an exemplary embodiment.

[0052] Figure 4 This is a schematic diagram of an L-shaped connector for a transmission tower angle steel stability enhancement structure, according to an exemplary embodiment.

[0053] Figure 5 This is a schematic diagram illustrating the layout of a real-time monitoring and analysis system for the reliability of an entire iron tower, according to an exemplary embodiment.

[0054] Figure 6 This is a schematic diagram of a real-time reliability monitoring and analysis system for a transmission tower angle steel stability enhancement structure, according to an exemplary embodiment.

[0055] Figure 7 This is a comparison diagram of the bearing capacity of a lattice-type cross-section and a traditional solid-web cross-section of a transmission tower angle steel stability enhancement structure according to an exemplary embodiment.

[0056] In the diagram: 1. D-shaped connector; 2. L-shaped connector; 3. Angle steel of transmission tower; 4. Bolt; 5. Gasket-type pressure sensor; 6. Thin-film pressure sensor; 7. Wiring hole; 8. Bolt hole; 9. Real-time reliability monitoring and analysis system. Detailed Implementation

[0057] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some portions and features of certain embodiments may be included in or replace portions and features of other embodiments. The scope of the embodiments herein includes the entire scope of the claims and all available equivalents thereof. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0058] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0059] Figure 1 An embodiment of a stability enhancement structure for angle steel of a transmission tower according to the present invention is shown.

[0060] In this optional embodiment, the transmission tower angle steel stability enhancement structure includes:

[0061] D-shaped connector 1 is installed on the concave side of the angle steel 3 of the transmission tower;

[0062] L-shaped connector 2 is provided on the convex side of the transmission tower angle steel 3, and the transmission tower angle steel 3 is closely fitted with L-shaped connector 2 and D-shaped connector 1 to form a lattice structure, so as to increase the moment of inertia and radius of gyration of the cross section and enhance the buckling resistance of the transmission tower angle steel 3.

[0063] Bolt 4 is used to connect and fix the D-shaped connector 1 and the L-shaped connector 2.

[0064] A gasket-type pressure sensor 5 is disposed between the L-shaped connector 2 and the bolt 4 or between the D-shaped connector 1 and the bolt 4, for real-time monitoring of bolt preload.

[0065] A thin-film pressure sensor 6 is disposed between the two flanges of the D-shaped connector 1 and the angle steel of the transmission tower 3, and is used to monitor the surface pressure between the D-shaped connector 1 and the angle steel of the transmission tower 3 in real time.

[0066] The reliability real-time monitoring and analysis system 9 is used to electrically connect with the gasket-type pressure sensor 5 and the thin-film pressure sensor 6. Based on the comparison results of the bolt preload and surface pressure with the preset working warning value and working crisis value, it monitors the stability of the transmission tower angle steel stability enhancement structure in real time.

[0067] In this optional embodiment, the D-shaped connector 1 is composed of a straight steel plate and a C-shaped equilateral angle steel, and the straight steel plate is connected to the L-shaped connector 2 by the bolt 4. A thin-film pressure sensor 6 is provided between the C-shaped equilateral angle steel and the transmission tower angle steel 3.

[0068] In this optional embodiment, the two ends of the L-shaped connector 2 are bent. The bent part is connected to the straight steel plate of the D-shaped connector 1 by bolts 4, and the bent part is also parallel to the straight steel plate of the D-shaped connector 1.

[0069] In this optional embodiment, both the D-shaped connector 1 and the L-shaped connector 2 are arranged along the length of the transmission tower angle steel 3, and both the D-shaped connector 1 and the L-shaped connector 2 are made of high-entropy alloy.

[0070] In this optional embodiment, a gap is left between the D-shaped connector 1 and the end edge of the transmission tower angle steel 3, and the size of the gap can be adjusted by the fastening bolt 4 to achieve a tight fit between the D-shaped connector 1 and the transmission tower angle steel 3.

[0071] In this optional embodiment, the pad-type pressure sensor 5 and the thin-film pressure sensor 6 are arranged at the same horizontal height to monitor the tightness of the bolt 4 at the same height position and the tightness of the fit between the D-shaped connector 1 and the angle steel 3 of the transmission tower.

[0072] In this optional embodiment, both the pad-type pressure sensor 5 and the thin-film pressure sensor 6 are connected to the real-time reliability monitoring and analysis system 9 via wired transmission.

[0073] In this optional embodiment, the D-shaped connector 1 is provided with a plurality of through wiring holes 7, and both the D-shaped connector 1 and the L-shaped connector 2 are provided with a plurality of bolt holes 8 that cooperate with the bolts 4.

[0074] In this optional embodiment, the real-time reliability monitoring and analysis system 9 includes an energy supply module, a data acquisition module, and a data processing module, and the data acquisition module is electrically connected to the pad-type pressure sensor 5 and the thin-film pressure sensor 6.

[0075] The energy supply module is used to provide energy to the data acquisition module and the data processing module.

[0076] The data acquisition module is used to acquire the bolt preload between the L-shaped connector and the bolt, and the surface pressure between the D-shaped connector and the angle steel of the transmission tower.

[0077] The data processing module is used to evaluate the stability of the transmission tower angle steel based on the bolt preload and surface pressure.

[0078] In this optional embodiment, the energy supply module includes a solar panel, a charging controller, and a battery, all of which provide energy to the data acquisition module and the data processing module. The data acquisition module transmits data to the data processing module in real time via wired transmission. The data processing module includes a computer, a data transmission network card, and a user remote analysis terminal. The computer receives, classifies, and processes the data from the data acquisition module to assess the operational reliability of the transmission tower angle steel stability improvement structure. The data transmission network card wirelessly transmits the computer-processed data to a cloud platform / server. The user remote analysis terminal stores and relays data from the cloud platform / server and issues operational reliability commands to the data transmission network card.

[0079] Figure 2 An embodiment of a reliability monitoring method for a transmission tower angle steel stability enhancement structure according to the present invention is shown.

[0080] In this optional embodiment, the reliability monitoring method for the stability enhancement structure of the transmission tower angle steel includes:

[0081] Based on a preset interval, the bolt preload and surface pressure of the gasket-type pressure sensor and the thin-film pressure sensor are obtained to obtain several pressure data values;

[0082] Calculate the average of several pressure data values ​​and use the calculated average as the average of the daily sensor monitoring data.

[0083] Based on the comparison results of the daily average sensor monitoring data with the preset working early warning value and working crisis value, the working status and corresponding handling strategy of the transmission tower angle steel stability improvement structure are determined.

[0084] In this optional embodiment, the determination of the preset work warning value and work crisis value includes:

[0085] Obtain daily pressure data values ​​within a preset number of days, remove outliers from the pressure data values, and calculate the average and standard deviation of the pressure data values ​​based on the removed pressure data values.

[0086] Based on the standard deviation of the stress data values, combined with the initial value of no loss under normal working conditions, the work warning value and work crisis value of the stress data are determined.

[0087] In this optional embodiment, the formula for calculating the work warning value is:

[0088] F y =F0-3F σ

[0089]

[0090] The formula for calculating the job crisis value is:

[0091] F w =F0-8F σ

[0092] In the formula, F y F0 is the initial value for normal operation without loss, and F is the warning value for work. δ Here, n represents the standard deviation, and F represents the pressure data value. j For the average value, F μ F is the expected value. i For pressure data values, F w This is a work-related crisis value.

[0093] In this optional embodiment, determining the working status and corresponding handling strategy of the transmission tower angle steel stability enhancement structure based on the comparison results of the daily average sensor monitoring data with preset work warning values ​​and work crisis values ​​includes:

[0094] When the average value of the daily sensor monitoring data is greater than the preset working warning value, it is determined that the stability enhancement structure of the transmission tower angle steel is in normal working condition.

[0095] When the average value of the daily sensor monitoring data is greater than the preset critical working value but less than or equal to the preset early warning value, the transmission tower angle steel stability enhancement structure is determined to be in an early warning working state, and it is suggested to strengthen monitoring and pay close attention.

[0096] When the average value of the daily sensor monitoring data is less than or equal to the preset working crisis value, the stability enhancement structure of the transmission tower angle steel is determined to be in a crisis emergency state, and it is indicated that the sensor loss value exceeds the safe range, and timely repair and control are required for the loss points.

[0097] To facilitate understanding of the above-mentioned technical solutions of the present invention, the following further describes the above-mentioned technical solutions of the present invention from the perspectives of architecture and principle, as follows:

[0098] This invention proposes a stability enhancement technology and reliability monitoring method for transmission tower angle steel. It ensures stability enhancement without power outages, employing a bolt-assembly stability enhancement method that achieves zero-welding operation. The construction process is simple, offering advantages such as safety, economy, and efficiency. It also avoids drilling holes in the main angle steel material, preventing stress concentration and preserving the strength of the main angle steel. Furthermore, this invention uses gasket-type and thin-plate-type pressure sensors to monitor the bolt tightness in real time during the stability enhancement device's operation, solving the traditional problem of unload due to loose bolt preload. It also divides the working state into intervals, enabling real-time monitoring of the working state. This invention employs a lattice-section stability enhancement method. The lattice section allows for a more rational material distribution, positioning the material away from the centroidal axis of the section, increasing the moment of inertia and radius of gyration. Transmission tower materials are all slender angle steel (compression members), and their load-bearing capacity mainly depends on overall stability, which is directly proportional to the square of the radius of gyration. Therefore, under the same steel usage conditions, compared to the traditional solid-web enlargement method, this method better prevents component instability and significantly improves load-bearing capacity.

[0099] Example 1

[0100] A stability enhancement structure for transmission tower angle steel includes:

[0101] D-shaped connector 1 is prefabricated and welded in the factory using C-shaped equal-limb angle steel and straight steel plate. The thickness of both the C-shaped equal-limb angle steel and the straight steel plate is consistent with the thickness of the transmission tower angle steel 3. High-entropy alloy is used. D-shaped connector 1 has a single row of bolt holes 8 on both sides along its length. The bolt holes are in groups of three. The bolt holes are 20mm standard round holes with a spacing of 60mm. The bolt holes are 30mm from the edge of the steel plate. The spacing between each group of bolt holes is 210mm.

[0102] The thickness of L-shaped connector 2 is consistent with that of the angle steel 3 of the transmission tower. It is made of high-entropy alloy. The bending angle of the end of L-shaped connector 2 is 135 degrees and the width of the bent part is 60mm. It is connected to D-shaped connector 1 by bolt 4 (M16 high-strength bolt). The high-strength bolt is arranged with the same holes as D-shaped connector.

[0103] A 2-3mm gap is left between the D-shaped connector 1 and the end edge of the transmission tower angle steel 3. This gap is compacted by the pre-tightening force of the bolts, thereby assembling the transmission tower angle steel 3 with the D-shaped and L-shaped connectors into a lattice-like whole. This arrangement of materials away from the centroidal axis of the cross-section increases the moment of inertia and radius of gyration of the cross-section, thereby increasing the load-bearing capacity of the transmission tower angle steel.

[0104] Three M16 high-strength bolts are arranged in a group with a bolt spacing of 60mm. Each group is spaced 210mm apart. Every five groups of high-strength bolts, a gasket-type pressure sensor 5 is installed in the middle bolt. The gasket-type pressure sensor 5 is spaced 1980mm apart. The sensor is a 40mm×40mm rectangle with a thickness of 5mm. The pressure sensor values ​​can monitor the tightness of the bolts and prevent loosening that could lead to device failure.

[0105] A thin-film pressure sensor 6 is arranged between the D-shaped connector 1 and the angle steel of the transmission tower 3. It is located at the same horizontal height as the gasket pressure sensor. The value of the thin-film sensor can assess the tightness of the fit between the stability improvement device and the angle steel of the transmission tower.

[0106] Both the pad-type pressure sensor 5 and the thin-film pressure sensor 6 employ wired transmission. A real-time reliability monitoring and analysis system 9 is installed on the lowest transverse diaphragm of the transmission tower. The real-time reliability monitoring and analysis system 9 includes an energy supply module, a data acquisition module, and a data processing module. The energy supply module includes a solar panel, a charging controller, and a battery to provide energy to the system. The data acquisition module includes a cluster of pad-type pressure sensors and a cluster of thin-film pressure sensors, which transmit data to the data processing module in real time via wired transmission. The data processing module includes a data computer (receiving, classifying, and processing), a data transmission network card, and a user remote analysis terminal, used to process real-time data and evaluate the reliability of the device.

[0107] The data acquisition module transmits data to the data processing module in real time via wired transmission, while the data transmission network card transmits data to the user's remote analysis terminal via wireless transmission for data analysis.

[0108] The D-shaped connector 1 has a 10mm diameter cable routing hole 7 for leading the data cable of the thin-film pressure sensor 6 out from inside the stability enhancement device. The sensor data cable is led out along the reserved cable routing hole and runs along the tower leg to the real-time reliability monitoring and analysis system 9.

[0109] When the stability enhancement device is operating normally under preload, the sensor monitors the initial normal data F0. F0 is the initial value without loss during normal operation. The pad-type pressure sensor and the thin-plate pressure sensor transmit data to the real-time reliability monitoring and analysis system every half hour, forming a pressure data value F. i Each sensor generates 48 pressure data values ​​per day. The user analysis terminal will then analyze the daily pressure data values. i Statistical analysis was conducted, and data was collected continuously for 30 calendar days to obtain the early warning value F for the stability enhancement device. y Work Crisis Value F w Specifically: Outliers are removed using the interquartile range method. The remaining n pressure data values ​​F are then processed. i The statistical average is obtained by averaging the daily data. j Statistical calculations were performed on a sample of 30 calendar days to obtain the expected value F. μ and standard deviation F σ Thus, the work warning value F is obtained. y Work Crisis Value F w After 30 calendar days, the average daily sensor monitoring data F is obtained using this method. s .

[0110] The formula for calculating the work warning value is:

[0111] F y =F0-3F σ

[0112]

[0113] The formula for calculating the job crisis value is:

[0114] F w =F0-8F σ

[0115] In the formula, F y F0 is the initial value for normal operation without loss, and F is the warning value for work. σ Here, n represents the standard deviation, and F represents the pressure data value. j For the average value, F μ F is the expected value. i For pressure data values, F w This is a work-related crisis value.

[0116] By analyzing real-time monitoring data through pressure sensors, if the average daily sensor monitoring data F j >F y The stability enhancement device is in normal working condition; if F w <Daily sensor monitoring data average F j ≤F yThe stability enhancement device is in an early warning state, at which time it should be monitored more closely and closely monitored; the daily average value of sensor monitoring data F j ≤F w The stability enhancement device is in a critical emergency state. The sensor loss values ​​have exceeded the safe range, and it is necessary to repair and control the loss points in a timely manner.

[0117] The angle steel components of transmission towers are primarily susceptible to buckling failure under compression. The prefabricated lattice-type stability method provided by this invention utilizes high-strength bolts to tightly enclose the angle steel of the transmission tower with L-shaped and D-shaped connectors to form a lattice-type cross-section. This results in a more rational distribution of material within the cross-section, with the material positioned away from the centroidal axis of the cross-section, increasing the moment of inertia and radius of gyration, thus significantly enhancing the buckling resistance of the transmission tower angle steel and strengthening its load-bearing capacity. The operational status monitoring method analyzes sensor data in real time, divides operational status intervals, and comprehensively evaluates the real-time operational reliability of the lattice-type stability enhancement device.

[0118] Example 2

[0119] A stability enhancement structure for transmission tower angle steel includes:

[0120] Both the D-shaped connector 1 and the L-shaped connector 2 have a single row of bolt holes 8 on both sides along their length. The bolts are arranged at equal intervals, with a bolt hole spacing of 100mm and the bolt holes being standard 20mm round holes.

[0121] Bolts 4 (M16 high-strength bolts) are arranged at equal intervals of 100mm. Gasket-type pressure sensors 5 are evenly arranged at intervals of 3300mm. The sensor specifications are 40mm×40mm rectangles with a thickness of 5mm. The pressure sensor values ​​can monitor the tightness of the bolts and prevent loosening from causing the device to fail.

[0122] Thin-film pressure sensors 6 are arranged between the D-shaped connector 1 and the angle steel of the transmission tower 3. The thin-film pressure sensors are evenly arranged at intervals of 3300mm. The values ​​of the thin-film sensors can be used to assess the tightness of the fit between the stability improvement device and the angle steel of the transmission tower.

[0123] The pad-type pressure sensor 5 can use a combination of wireless and wired transmission, while the thin-film pressure sensor 6 uses wired transmission.

[0124] The remaining structure is consistent with the structure disclosed in Example 1.

[0125] Example 3

[0126] A stability enhancement structure for transmission tower angle steel includes:

[0127] D-shaped connector 1 is prefabricated and welded in the factory using C-shaped equal-limb angle steel and straight steel plate. The thickness of D-shaped connector 1 and L-shaped connector 2 is the same as that of 10mm, and the material is Q355.

[0128] When assembled using M16 high-strength bolts, there is no gap between the D-shaped connector 1 and the end edge of the transmission tower angle steel 3. The M16 high-strength bolts are used to assemble the D-shaped connector 1, L-shaped connector 2, and transmission tower angle steel 3 into a lattice-type stability-enhancing section, making the material arrangement more rational and increasing the section's moment of inertia and radius of gyration. This increases the load-bearing capacity of the transmission tower angle steel.

[0129] The remaining structure is consistent with the structure disclosed in Example 1.

[0130] This invention is not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A stability enhancement structure for angle steel of transmission towers, characterized in that, include: D-shaped connector (1) is provided on the concave side of the angle steel (3) of the transmission tower; L-shaped connector (2) is provided on the convex side of the transmission tower angle steel (3), and the transmission tower angle steel (3) is closely fitted with L-shaped connector (2) and D-shaped connector (1) to form a lattice structure, so as to increase the moment of inertia and radius of gyration of the section and enhance the buckling resistance of the transmission tower angle steel (3). Bolt (4) is used to connect and fix the D-shaped connector (1) and the L-shaped connector (2); A gasket-type pressure sensor (5) is disposed between the L-shaped connector (2) and the bolt (4) or between the D-shaped connector (1) and the bolt (4) for real-time monitoring of bolt preload. A thin-film pressure sensor (6) is disposed between the two flanges of the D-shaped connector (1) and the angle steel of the transmission tower (3) for real-time monitoring of the surface pressure between the D-shaped connector (1) and the angle steel of the transmission tower (3); A reliability real-time monitoring and analysis system (9) is used to electrically connect with the gasket-type pressure sensor (5) and the thin-film pressure sensor (6) to monitor the stability of the transmission tower angle steel stability enhancement structure in real time based on the comparison results of bolt preload and surface pressure with preset working warning value and working crisis value.

2. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, The D-shaped connector (1) is composed of a straight steel plate and a C-shaped equilateral angle steel. The straight steel plate is connected to the L-shaped connector (2) by the bolt (4). A thin-film pressure sensor (6) is installed between the C-shaped equilateral angle steel and the transmission tower angle steel (3).

3. The stability enhancement structure for transmission tower angle steel according to claim 2, characterized in that, The two ends of the L-shaped connector (2) are bent. The bent part is connected to the straight steel plate of the D-shaped connector (1) by bolts (4), and the bent part is parallel to the straight steel plate of the D-shaped connector (1).

4. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, Both the D-shaped connector (1) and the L-shaped connector (2) are arranged along the length of the transmission tower angle steel (3), and both the D-shaped connector (1) and the L-shaped connector (2) are made of high-entropy alloy.

5. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, A gap is left between the D-shaped connector (1) and the end edge of the transmission tower angle steel (3), and the size of the gap can be adjusted by the fastening bolt (4) to achieve a tight fit between the D-shaped connector (1) and the transmission tower angle steel (3).

6. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, The pad-type pressure sensor (5) and the thin-film pressure sensor (6) are arranged at the same horizontal height so as to monitor the tightness of the bolts (4) at the same height position and the tightness of the fit between the D-shaped connector (1) and the angle steel (3) of the transmission tower.

7. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, Both the pad-type pressure sensor (5) and the thin-film pressure sensor (6) are connected to the real-time reliability monitoring and analysis system (9) via wired transmission.

8. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, The D-shaped connector (1) has several through-holes (7), and both the D-shaped connector (1) and the L-shaped connector (2) have several bolt holes (8) that cooperate with the bolts (4).

9. The stability enhancement structure for transmission tower angle steel according to claim 1, characterized in that, The reliability real-time monitoring and analysis system (9) includes an energy supply module, a data acquisition module and a data processing module, and the data acquisition module is electrically connected to the pad-type pressure sensor (5) and the thin-film pressure sensor (6). The energy supply module is used to provide energy to the data acquisition module and the data processing module. The data acquisition module is used to acquire the bolt preload between the L-shaped connector and the bolt, and the surface pressure between the D-shaped connector and the angle steel of the transmission tower. The data processing module is used to evaluate the stability of the transmission tower angle steel based on the bolt preload and surface pressure.

10. The stability enhancement structure for transmission tower angle steel according to claim 9, characterized in that, The energy supply module includes a solar panel, a charging controller, and a battery, all of which are used to provide energy to the data acquisition module and the data processing module.

11. The stability enhancement structure for transmission tower angle steel according to claim 9, characterized in that, The data acquisition module transmits data to the data processing module in real time via wired transmission.

12. The stability enhancement structure for transmission tower angle steel according to claim 9, characterized in that, The data processing module includes a computer, a data transmission network card, and a user remote analysis terminal. The computer is used to receive, classify, and process data from the data acquisition module to evaluate the operational reliability of the transmission tower angle steel stability improvement structure. The data transmission network card is used to wirelessly transmit the data processed by the computer to the cloud platform / server. The user remote analysis terminal is used to store and relay data from the cloud platform / server, and to issue operational reliability commands to the data transmission network card.

13. A reliability monitoring method for a stability enhancement structure of an angle steel transmission tower, characterized in that, include: Based on a preset interval, the bolt preload and surface pressure of the gasket-type pressure sensor and the thin-film pressure sensor are obtained to obtain several pressure data values; Calculate the average of several pressure data values ​​and use the calculated average as the average of the daily sensor monitoring data. Based on the comparison results of the daily average sensor monitoring data with the preset working early warning value and working crisis value, the working status and corresponding handling strategy of the transmission tower angle steel stability improvement structure are determined.

14. The reliability monitoring method for the stability enhancement structure of the transmission tower angle steel according to claim 13, characterized in that, The determination of preset work early warning values ​​and work crisis values ​​includes: Obtain daily pressure data values ​​within a preset number of days, remove outliers from the pressure data values, and calculate the average and standard deviation of the pressure data values ​​based on the removed pressure data values. Based on the standard deviation of the stress data values, combined with the initial value of no loss under normal working conditions, the work warning value and work crisis value of the stress data are determined.

15. The reliability monitoring method for the stability enhancement structure of the transmission tower angle steel according to claim 14, characterized in that, The formula for calculating the work warning value is: F y =F0-3F σ The formula for calculating the job crisis value is: F w =F0-8F σ In the formula, F y F0 is the initial value for normal operation without loss, and F is the warning value for work. σ Here, n represents the standard deviation, and F represents the pressure data value. j For the average value, F μ F is the expected value. i For pressure data values, F w This is a work-related crisis value.

16. The reliability monitoring method for the stability enhancement structure of the transmission tower angle steel according to claim 13, characterized in that, The process of determining the working status and corresponding handling strategies of the transmission tower angle steel stability enhancement structure based on the comparison results of the daily average sensor monitoring data with preset work warning values ​​and work crisis values ​​includes: When the average value of the daily sensor monitoring data is greater than the preset working warning value, it is determined that the stability enhancement structure of the transmission tower angle steel is in normal working condition. When the average value of the daily sensor monitoring data is greater than the preset critical working value but less than or equal to the preset early warning value, the transmission tower angle steel stability enhancement structure is determined to be in an early warning working state, and it is suggested to strengthen monitoring and pay close attention. When the average value of the daily sensor monitoring data is less than or equal to the preset working crisis value, the stability enhancement structure of the transmission tower angle steel is determined to be in a crisis emergency state, and it is indicated that the sensor loss value exceeds the safe range, and timely repair and control are required for the loss points.

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