Online monitoring device for aeolian vibration of power transmission line

Abstract

The utility model discloses a transmission line aeolian vibration on-line monitoring device which comprises an upper shell and a lower shell, a detachable shell is assembled between the upper shell and the lower shell, a transmission line penetrates through the shell, a circuit board and a lithium battery are arranged in an inner cavity of the lower shell, and a wind speed sensor penetrating out of the lower shell is arranged at one end of a rotating shaft connected in the lower shell. And the lower shell is also connected with a friction force detection mechanism sleeved on the power transmission line. According to the power transmission line aeolian vibration online monitoring device, a wind speed sensor is used for detecting the wind speed, a friction force detection mechanism is used for detecting the friction force on the surface of a wire line, whether the surface of the line is iced or not is detected through the friction force, and whether a shell swings or not can be obtained through an eddy current displacement sensor; and then the wind speed and the friction force are detected through the wind speed sensor and the friction force detection mechanism, so that the factors of line vibration can be monitored.

Description

Technical Field

[0001] This utility model relates to the field of online monitoring technology for micro-wind vibration, and more specifically, to an online monitoring device for micro-wind vibration of power transmission lines. Background Technology

[0002] Conductor vibration due to a breeze is a high-frequency, small-amplitude movement of the conductor caused by a light breeze, and it is common in power transmission lines. The main causes of line vibration are:

[0003] At low wind speeds (0.5-10 m / s), vibration is more likely to occur when the angle between the wind direction and the conductor is between 45° and 90°, while vibration is less likely to occur when the angle is less than 20°. The vibration frequency is generally between 1 and 150 Hz. Periodic eddy currents are generated behind the conductor and detached, causing high-frequency (3-150 Hz) small-amplitude vibrations, which can lead to metal fatigue in the long term.

[0004] Dancing: Icing power lines, due to aerodynamic instability at moderate wind speeds, exhibit low-frequency (0.1-3Hz) and large-amplitude lateral swaying, which may cause short circuits or structural damage.

[0005] Prolonged high-frequency, low-amplitude vibrations can cause serious damage to power transmission lines, such as wear on conductor fittings and damage to tower components. In severe cases, it can lead to conductor fatigue breakage, wire breakage, and fitting detachment, seriously threatening the safe operation of power transmission lines. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, this utility model provides an online monitoring device for micro-wind vibration of transmission lines to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an online monitoring device for micro-wind vibration of transmission lines, comprising an upper shell and a lower shell, wherein the upper shell and the lower shell are assembled into a detachable housing, the housing is penetrated by the transmission line, a circuit board and a lithium battery are disposed in the inner cavity of the lower shell, a monitoring system is disposed on the circuit board, the monitoring system includes a data acquisition unit, a communication unit, a power supply unit and a positioning unit, a wind speed sensor is disposed at one end of a rotating shaft connected inside the lower shell and extending out of the lower shell, and a friction force detection mechanism sleeved on the transmission line is also connected to the lower shell, the wind speed sensor and the friction force detection mechanism are electrically connected to the data acquisition unit;

[0008] An arc-shaped solar panel is installed on the top surface of the upper shell, and the wheels connected to the upper and lower shells hold the power transmission lines.

[0009] Furthermore, a conductive sleeve is fitted on the outer wall of the rotating shaft, and the wires connected to the conductive sleeve are connected to the circuit board.

[0010] Furthermore, the upper shell is provided with a conductive plug that is electrically connected to the arc-shaped solar panel, and the conductive socket connected to the lower shell is connected to the lithium battery. The power supply unit is connected to the lithium battery. The conductive plug is inserted into the conductive socket, the arc-shaped solar panel is used to charge the lithium battery, and the lithium battery supplies power to the circuit board.

[0011] Furthermore, the wheel connected to the lower shell is connected to a micro motor, and the micro motor is electrically connected to the circuit board.

[0012] Furthermore, the friction detection mechanism includes a front plate, an arc-shaped plate one, an arc-shaped plate two, elastic telescopic rods, cable clamps, springs, and a tension detection sensor. The bottom end of the front plate is fixed to the lower shell, and a tension detection sensor is connected to the side of the front plate. The spring connected to the tension detection sensor is connected to the arc-shaped plate two, and the arc-shaped plate two is snapped together with the arc-shaped plate one. Several elastic telescopic rods are distributed on the inner walls of the arc-shaped plate two and the arc-shaped plate one. Cable clamps are fixed to the ends of the elastic telescopic rods, and the cable clamps clamp the power transmission line.

[0013] Furthermore, the two ends of the second arc-shaped plate are provided with insert rods, and the two ends of the first arc-shaped plate are provided with slots for inserting the insert rods.

[0014] Furthermore, both the second and first arc-shaped plates are connected to sliders, which slide along the grooves of the upper and lower shells.

[0015] Furthermore, the wires connected to the tensile force detection sensor are electrically connected to the circuit board.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The online monitoring device for micro-wind vibration of transmission lines uses a wind speed sensor to detect wind speed and a friction force detection mechanism to detect the friction force on the surface of the conductor. The friction force is used to detect whether the surface of the line is covered with ice. An eddy current displacement sensor can detect whether the housing is swaying. By using the wind speed sensor and the friction force detection mechanism to detect wind speed and friction force, the device can monitor the factors causing line vibration, and promptly detect problems and the need for line maintenance. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 The overall structural diagram provided for this utility model;

[0020] Figure 2Cross-sectional structural diagrams of the upper and lower shells provided for this utility model;

[0021] Figure 3 A separation diagram of the upper and lower shells provided for this utility model;

[0022] Figure 4 Provided by this utility model Figure 3 Enlarged view of point A;

[0023] Figure 5 The structural diagram of the friction force detection mechanism provided by this utility model;

[0024] Figure 6 The schematic diagram of the monitoring system provided by this utility model;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Upper shell; 11. Curved solar panel; 12. Conductive insertion rod; 2. Lower shell; 21. Conductive socket; 22. Micro motor; 3. Circuit board; 5. Shaft; 51. Wind speed sensor; 6. Friction detection mechanism; 61. Front panel; 62. Curved plate one; 63. Curved plate two; 631. Insert rod; 632. Slot; 64. Elastic telescopic rod; 65. Cable clamp; 66. Spring; 67. Tension detection sensor. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] See attached document Figures 1-5 The transmission line micro-wind vibration online monitoring device of this embodiment includes an upper shell 1 and a lower shell 2. The upper shell 1 and the lower shell 2 are assembled into a detachable shell. The shell is penetrated by the transmission line. A circuit board 3 and a lithium battery are installed in the inner cavity of the lower shell 2. A wind speed sensor 51 is installed at one end of the rotating shaft 5 connected inside the lower shell 2 and extends out of the lower shell 2. A friction detection mechanism 6 is also connected to the lower shell 2 and sleeved on the transmission line.

[0031] Specifically, the wind speed sensor 51 is used to detect wind speed, while the friction detection mechanism 6 is used to detect the friction on the surface of the conductor. The friction is used to detect whether the surface of the conductor is covered with ice. The circuit board 3 is also equipped with an eddy current displacement sensor, which can detect whether the housing is swaying. Then, the wind speed sensor 51 and the friction detection mechanism 6 are used to detect the wind speed and friction, thereby monitoring the factors that cause line vibration.

[0032] An arc-shaped solar panel 11 is installed on the top surface of the upper shell 1, and the power transmission line is clamped by the wheel body connected to the upper shell 1 and the lower shell 2.

[0033] Specifically, the curved solar panel 11 adopts a circular arc structure, which increases the angle at which sunlight is received, allowing sunlight to shine on the curved solar panel 11 throughout the day.

[0034] A conductive sleeve is fitted on the outer wall of the rotating shaft 5. The wires connected to the conductive sleeve are connected to the circuit board 3. The rotating shaft 5 can rotate around the lower shell 2. The wind speed sensor 51 rotates synchronously with the rotating shaft 5. The rotating shaft 5 also adopts a conductive structure. The conductive sleeve is fitted on the rotating shaft 5. The circuit board 3 supplies power to the wind speed sensor 51 through the rotating shaft 5 and the rotating shaft 5.

[0035] The upper shell 1 is provided with a conductive plug 12 that is electrically connected to the arc-shaped solar panel 11, and the lower shell 2 is connected to a conductive socket 21 that is connected to the lithium battery. The conductive plug 12 is inserted into the conductive socket 21, the arc-shaped solar panel 11 is used to charge the lithium battery, and the lithium battery supplies power to the circuit board 3.

[0036] Specifically, the conductive rod 12 and the conductive socket 21 are inserted into each other. When the upper shell 1 and the lower shell 2 are assembled together, the electrical energy converted by the arc-shaped solar panel 11 is used to charge the lithium battery through the conductive rod 12 and the conductive socket 21, so that the lithium battery can supply power to the circuit board 3 for a long time.

[0037] The wheel connected to the lower shell 2 is connected to the micro motor 22, which is electrically connected to the circuit board 3. The micro motor 22 is controlled by the circuit board 3, thereby driving the wheel to rotate to move along the power transmission line.

[0038] The friction detection mechanism 6 includes a front plate 61, an arc plate 1 62, an arc plate 2 63, an elastic telescopic rod 64, a cable clamp 65, a spring 66, and a tension detection sensor 67. The bottom end of the front plate 61 is fixed to the lower shell 2. The tension detection sensor 67 is connected to the side of the front plate 61. The spring 66 connected to the tension detection sensor 67 is connected to the arc plate 2 63. The arc plate 2 63 is snapped into the arc plate 1 62. Several elastic telescopic rods 64 are distributed on the inner walls of the arc plate 2 63 and the arc plate 1 62. The cable clamp 65 is fixed to the port of the elastic telescopic rod 64 and clamps the power transmission line.

[0039] Both ends of the second arc plate 63 are provided with insertion rods 631, and both ends of the first arc plate 62 are provided with slots 632 for inserting the insertion rods. Slider blocks are connected to both the second arc plate 63 and the first arc plate 62, and the sliders slide along the grooves of the upper shell 1 and the lower shell 2. The wires connected to the tension detection sensor 67 are electrically connected to the circuit board 3.

[0040] Arc-shaped plate 2 63 and arc-shaped plate 1 62 are opened or closed so that the circuit is clamped by arc-shaped plate 2 63 and arc-shaped plate 1 62.

[0041] Specifically, when the equipment is in operation, the elastic force of the elastic telescopic rod 64 will cause the cable clamp 65 to press against the power transmission line. When the housing moves, it will drive the front plate 61 to move. The spring 66 will pull the arc plate 2 63 and arc plate 1 62 to move. The cable clamp 65 moves synchronously with the arc plate 2 63 and arc plate 1 62. The cable clamp 65 moves along the power transmission line. The friction between the cable clamp 65 and the power transmission line is detected by the tension detection sensor 67. The friction of the line is different when it is iced and when it is not iced. By comparing the detected friction with the existing friction when it is not iced, the detected friction coefficient is less than the existing friction when it is not iced, thus detecting line icing.

[0042] After the eddy current displacement sensor detects the vibration of the housing, the wind speed sensor 51 and the friction force detection mechanism 6 detect the wind speed and friction force to determine whether icing has occurred, thereby detecting the factors that cause the vibration and promptly identifying problems and lines that need maintenance.

[0043] See attached document Figure 6 A monitoring system is installed on circuit board 3, which includes a data acquisition unit, a communication unit, a power supply unit, and a positioning unit. The positioning unit is a GNM151 Beidou module. Wind speed sensor 51 and tension sensor 67 are electrically connected to the data acquisition unit. The wind direction and friction force data collected by the data acquisition unit are transmitted to the monitoring center through the communication unit. The curved solar panel 11 is used to charge the lithium battery, which powers circuit board 3. The communication unit uses a 4G / GPRS / CDMA wireless sensor network communication module. The data collected by the monitoring center simulates the vibration curve trajectory of the transmission line at the monitoring point. The data collected by the vibration sensor, including parameters such as conductor vibration frequency, vibration amplitude, wind direction, wind speed, and wind pressure, are transmitted to the monitoring center through the wireless communication system. The monitoring center records the original sensor data and generates vibration waveform diagrams, providing raw data support for subsequent data analysis and processing. It also provides theoretical basis and data for experts in the research of micro-wind vibration of transmission line conductors.

[0044] Example 2

[0045] The transmission line micro-wind vibration online monitoring device of this embodiment is basically the same as that of embodiment 1. The difference is that a pressure sensor is provided on the cable clamp 65 in this embodiment, while the tension detection sensor 67 and spring 66 are removed. During the movement of the housing, the diameter of the line in the icy state increases. When the cable clamp 65 passes through the icy cable, the pressure detected by the pressure sensor increases to determine whether the line is icy.

[0046] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An online monitoring device for micro-wind vibration of transmission lines, characterized in that, The device includes an upper shell (1) and a lower shell (2). The upper shell (1) and the lower shell (2) are assembled into a detachable housing. The housing is penetrated by a power transmission line. A circuit board (3) and a lithium battery are installed in the inner cavity of the lower shell (2). A monitoring system is installed on the circuit board (3). The monitoring system includes a data acquisition unit, a communication unit, a power supply unit, and a positioning unit. A wind speed sensor (51) is installed at one end of a rotating shaft (5) connected inside the lower shell (2) and extends out of the lower shell (2). A friction detection mechanism (6) is also connected to the lower shell (2) and is sleeved on the power transmission line. The wind speed sensor (51) and the friction detection mechanism (6) are electrically connected to the data acquisition unit. An arc-shaped solar panel (11) is installed on the top surface of the upper shell (1), and the power transmission line is clamped by the wheel body connected on the upper shell (1) and the lower shell (2).

2. The online monitoring device for micro-wind vibration of transmission lines according to claim 1, characterized in that: A conductive sleeve is fitted on the outer wall of the rotating shaft (5), and the wires connected to the conductive sleeve are connected to the circuit board (3).

3. The online monitoring device for micro-wind vibration of transmission lines according to claim 1, characterized in that: The upper shell (1) is provided with a conductive plug (12) electrically connected to the arc-shaped solar panel (11), and the conductive socket (21) connected to the lower shell (2) is connected to the lithium battery. The power supply unit is connected to the lithium battery. The conductive plug (12) is inserted into the conductive socket (21), the arc-shaped solar panel (11) is used to charge the lithium battery, and the lithium battery supplies power to the circuit board (3).

4. The online monitoring device for micro-wind vibration of transmission lines according to claim 1, characterized in that: The lower shell (2) is connected to the wheel body and the micro motor (22), and the micro motor (22) is electrically connected to the circuit board (3).

5. The online monitoring device for micro-wind vibration of transmission lines according to claim 1, characterized in that: The friction detection mechanism (6) includes a front plate (61), an arc plate one (62), an arc plate two (63), an elastic telescopic rod (64), a cable clamp (65), a spring (66), and a tension detection sensor (67). The bottom end of the front plate (61) is fixed on the lower shell (2). The tension detection sensor (67) is connected to the side of the front plate (61). The spring (66) connected to the tension detection sensor (67) is connected to the arc plate two (63). The arc plate two (63) is snapped together with the arc plate one (62). Several elastic telescopic rods (64) are distributed on the inner walls of the arc plate two (63) and the arc plate one (62). The cable clamp (65) is fixed on the port of the elastic telescopic rod (64). The cable clamp (65) clamps the power transmission line.

6. The online monitoring device for micro-wind vibration of transmission lines according to claim 5, characterized in that: The two ends of the second arc plate (63) are provided with insert rods (631), and the two ends of the first arc plate (62) are provided with slots (632) for inserting the insert rods.

7. The online monitoring device for micro-wind vibration of transmission lines according to claim 5, characterized in that: Both the second arc plate (63) and the first arc plate (62) are connected to sliders, which slide along the grooves of the upper shell (1) and the lower shell (2).

8. The online monitoring device for micro-wind vibration of transmission lines according to claim 5, characterized in that: The wires connected to the tensile force sensor (67) are electrically connected to the circuit board (3).

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