A multi-mode control instrument for a steel pipe tower pole of a power transmission line

Abstract

The application provides a power transmission line steel pipe tower bar piece multi-mode control instrument, and belongs to the field of control instruments. The control instrument solves the load problem of a power transmission tower of a large-span high-voltage power transmission line and the multi-mode vortex-induced vibration problem of a steel pipe tower bar piece under complex wind environment conditions. A fixing device of the control instrument is used for fixing a steel pipe. An acceleration sensor and a telescopic device are arranged in the fixing device. The acceleration sensor is used for measuring a vibration signal of the steel pipe. The acceleration sensor is electrically connected with a controller. The controller identifies a vibration frequency of the steel pipe. The telescopic device comprises a first telescopic rod and a second telescopic rod, and the second telescopic rod is electrically connected with the controller. The second telescopic rod is in contact with a locking block. The first telescopic rod is connected with a vibration device at a front end. The application provides a power transmission line steel pipe tower bar piece multi-mode control instrument. The control instrument has a simple structure, is convenient to process, and can effectively control vortex-induced vibration of a bar piece and increase stability and safety of the bar piece.

Description

Technical Field

[0001] This invention belongs to the field of control instruments, and in particular relates to a multi-mode control instrument for steel pipe tower members of transmission lines. It is a vibration reduction device for vortex-induced vibration of steel pipe tower members of transmission lines, enabling it to control multiple vibration modes caused by vortex-induced vibration of transmission towers in the power industry. Background Technology

[0002] With the rapid development of my country's power industry, the country has invested heavily in power grid upgrades. Currently, my country is constructing ultra-high-voltage transmission lines. Simultaneously, the number of long-span lines is increasing, leading to larger loads and dimensions on transmission towers. In this context, steel pipe towers offer three advantages over angle steel towers: they significantly reduce wind loads on the tower structure; the hollow circular cross-section of the steel pipe provides a large radius of gyration, easily meeting stiffness and stability requirements; and the simple connection design eliminates the negative impact of eccentricity on material properties caused by angle steel components, resulting in higher overall structural stiffness. Therefore, steel pipe towers have a very broad application prospect in high-load transmission lines.

[0003] While steel pipe towers offer numerous advantages, their widespread application has also exposed the problem of vortex-induced vibration (VID) in tower components. Although VID is a limited-amplitude vibration, the low wind speed and high frequency at which it occurs mean that prolonged vibration can easily cause fatigue damage to the tower's structural members and joints. Once the tower structure is damaged, it will directly threaten the stable operation of the power grid, causing significant economic losses and adverse social impacts.

[0004] In summary, to address the load issues of transmission towers on long-span high-voltage transmission lines and the multi-mode vortex-induced vibration problem of steel pipe tower members under complex wind conditions, it is urgent to develop a new type of controller that can reduce the vortex-induced vibration of steel pipe tower members and achieve different control effects based on different vibration modes of the vortex-induced vibration of the steel pipe tower members. The goal is to improve the stability and safety of transmission towers on long-span lines and to achieve intelligent adjustment of the vortex-induced vibration phenomenon of steel pipe tower members, thereby increasing the development goal of power generation scale. Summary of the Invention

[0005] In view of this, in order to solve the load problem of high-voltage transmission towers for long-span lines and the problem of multi-mode vortex-induced vibration of steel pipe tower members under complex wind conditions, this invention proposes a multi-mode control instrument for steel pipe tower members of transmission lines. The instrument has a simple structure, is easy to manufacture, and can effectively control the vortex-induced vibration of the members and increase the stability and safety of the members.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-mode vibration controller for steel pipe tower members of transmission lines, comprising a fixing device, a vibration device, a telescopic device, a controller, and an acceleration sensor. The fixing device is used to fix the steel pipe. The fixing device is equipped with an acceleration sensor and a telescopic device. The acceleration sensor is used to measure the vibration signal of the steel pipe. The acceleration sensor is electrically connected to the controller, and the controller identifies the vibration frequency of the steel pipe. The telescopic device includes a first telescopic rod and a second telescopic rod, which are electrically connected to the controller. The second telescopic rod contacts a locking block, and the front end of the first telescopic rod is connected to the vibration device.

[0007] Furthermore, the second telescopic rod retracts, and the locking block separates.

[0008] Furthermore, the vibration device includes a vibration arm and a vibration block, with the vibration arm and vibration block connected sequentially to the front end of the first telescopic rod.

[0009] Furthermore, by adjusting its own length, the first telescopic rod makes the vibration frequency of the vibrating arm and the vibrating block consistent with the measured frequency of the steel pipe. At this time, the second telescopic rod extends and the locking block is tightened, realizing the resonance of the vibrating arm, the vibrating block and the steel pipe, dissipating energy and suppressing vortex-induced vibration.

[0010] Furthermore, the locking block is divided into upper and lower parts, located on the upper and lower sides of the vibrating arm. When the first telescopic rod extends or retracts, the second telescopic rod retracts, allowing the vibrating arm to move freely. When the first telescopic rod has completed its extension or retraction, the second telescopic rod extends, causing the locking block to clamp the vibrating arm and fix it in place.

[0011] Furthermore, the fixing device includes a first fixing device and a second fixing device connected by bolts.

[0012] Furthermore, the second fixing device includes a second fixing device and a first fixing device, both of which are arc-shaped and arranged opposite to each other to form a clamp structure.

[0013] Furthermore, the second fixing device is a hollow structure, and an acceleration sensor and a telescopic device are installed inside it.

[0014] Compared with the prior art, the beneficial effects of the multi-vibration control instrument for steel pipe tower members of the transmission line described in this invention are: the invention has a simple structure, novel form, and convenient installation, and can combine local wind environment characteristics and vibration characteristics of steel pipe tower members to change the vibration control effect, effectively improving the safety and stability of steel pipe towers. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 This is a front view of the multi-mode vibration controller for steel pipe tower members described in Embodiment 1 of the present invention;

[0017] Figure 2 This is a 1-1 cross-sectional view of the multi-mode control instrument for steel pipe tower members described in Embodiment 1 of the present invention;

[0018] Figure 3 This is a 2-2 cross-sectional view of the multi-mode control instrument for steel pipe tower members described in Embodiment 2 of the present invention;

[0019] In the diagram, 1-steel pipe; 2-first fixing device; 3-second fixing device a; 4-second fixing device b; 5-vibrating arm; 6-vibrating block; 7-connecting block; 8-rolling wheel; 9-first telescopic rod; 10-second telescopic rod; 11-locking block; 12-controller; 13-accelerometer; 14-bolt. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0021] See Figure 1-3 This embodiment describes a multi-mode vibration controller for steel pipe tower members of a power transmission line, comprising a fixing device, a vibration device, a telescopic device, a controller 12, and an acceleration sensor 13. The fixing device is used to fix the steel pipe 1. The acceleration sensor 13 and the telescopic device are installed inside the fixing device. The acceleration sensor 13 is used to measure the vibration signal of the steel pipe 1. The acceleration sensor 13 is electrically connected to the controller 12, and the controller 12 identifies the vibration frequency of the steel pipe 1. The telescopic device includes a first telescopic rod 9 and a second telescopic rod 10, which are electrically connected to the controller 12. The second telescopic rod 10 contacts a locking block 11, and the front end of the first telescopic rod 9 is connected to the vibration device.

[0022] The vibration device includes a vibration arm 5 and a vibration block 6, with the vibration arm 5 and the vibration block 6 connected sequentially to the front end of the first telescopic rod 9.

[0023] The locking block 11 is divided into upper and lower parts, located on the upper and lower sides of the vibrating arm 5. When the first telescopic rod 9 extends or retracts, the second telescopic rod 10 retracts, allowing the vibrating arm 5 to move freely. When the first telescopic rod 9 has completed its extension or retraction, the second telescopic rod 10 extends, causing the locking block 11 to clamp the vibrating arm 5, thus fixing the vibrating arm 5 in place. When the second telescopic rod 10 retracts, the locking block 11 separates.

[0024] The first telescopic rod 9 adjusts its length so that the vibration frequency of the vibrating arm 5 and the vibrating block 6 is consistent with the measured frequency of the steel pipe 1. At this time, the second telescopic rod 10 extends and the locking block 11 is tightened, so as to realize the resonance of the vibrating arm 5, the vibrating block 6 and the steel pipe 1, dissipate energy and suppress vortex vibration.

[0025] The multi-mode control instrument for steel pipe tower members of the transmission line also includes a connecting device, which includes a connecting block 7 and several rolling wheels 8. Several rolling wheels 8 are arranged on the outer periphery of the connecting block 7, and the connecting block 7 is vertically installed on the outer periphery of the vibrating arm 5.

[0026] The connecting block 7 serves to support the vibrating arm 5 and the telescopic rod. Because the telescopic rod extends and retracts, the connecting block 7 needs to move left and right accordingly, and the roller 8 assists in the movement of the connecting block 7.

[0027] The fixing device includes a first fixing device 2 and a second fixing device connected by bolts 14.

[0028] The second fixing device includes a second fixing device a3 and a second fixing device b4. Both the second fixing device a3 and the first fixing device b4 are arc-shaped and are arranged opposite each other to form a clamp structure.

[0029] The second fixing device b4 is a hollow structure, and an acceleration sensor 13 and a telescopic device are installed inside it.

[0030] An acceleration sensor 13, a first telescopic rod 9, and a second telescopic rod 10 are installed inside the fixed device 2. The acceleration sensor 13 is used to measure the vibration frequency of the steel pipe 1. The first telescopic rod 9 and the second telescopic rod 10 dissipate vibration energy by adjusting their own lengths. The acceleration sensor 13 and the telescopic structure are electrically connected to the controller 12.

[0031] The first telescopic rod 9 and the second telescopic rod 10 adjust their lengths so that the vibration frequency of the vibrating arm 5 and the vibrating block 6 is consistent with the measured frequency of the steel pipe 1, thereby achieving resonance between the vibrating arm 5, the vibrating block 6 and the steel pipe 1, and thus dissipating energy.

[0032] Working principle of the multi-vibration control instrument for steel pipe tower components of the transmission line:

[0033] In use, the controller is mounted on the surface of the steel pipe tower members using a fixing device. The acceleration sensor 13 inside the controller identifies the vibration information of the steel pipe tower under wind load and transmits the information to the controller 12. The controller 12 then adjusts the length of the first telescopic rod 9 and the second telescopic rod 10 to achieve resonance between the vibrating arm 5, the vibrating block 6 and the steel pipe 1, thereby dissipating the energy of the vortex vibration phenomenon of the steel pipe and achieving control of the vortex vibration phenomenon of the steel pipe.

[0034] Among them, the accelerometer 13 can be used to collect the vibration signal of the steel pipe, so as to realize the intelligent control of the vortex vibration phenomenon of different steel pipe tower members under different wind loads.

[0035] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A multi-mode vibration control instrument for steel pipe tower members of transmission lines, characterized in that: The device includes a fixing device, a vibration device, a telescopic device, a controller (12), and an acceleration sensor (13). The fixing device is used to fix the steel pipe (1). The fixing device is equipped with an acceleration sensor (13) and a telescopic device. The acceleration sensor (13) is used to measure the vibration signal of the steel pipe (1). The acceleration sensor (13) is electrically connected to the controller (12). The controller (12) identifies the vibration frequency of the steel pipe (1). The telescopic device includes a first telescopic rod (9) and a second telescopic rod (10) which are electrically connected to the controller (12). The second telescopic rod (10) is in contact with a locking block (11). The front end of the first telescopic rod (9) is connected to a vibration device. The vibration device includes a vibration arm (5) and a vibration block (6), and the front end of the first telescopic rod (9) is connected to the vibration arm (5) and the vibration block (6) in sequence; The locking block (11) is divided into upper and lower parts, located on the upper and lower sides of the vibrating arm (5). When the first telescopic rod (9) extends and retracts, the second telescopic rod (10) retracts, and the vibrating arm (5) can move freely. When the first telescopic rod (9) has finished extending and retracting, the second telescopic rod (10) extends, which causes the locking block (11) to clamp the vibrating arm (5) and fix the vibrating arm (5).

2. The multi-mode vibration controller for steel pipe tower members of transmission lines according to claim 1, characterized in that: The second telescopic rod (10) retracts, and the locking block (11) separates.

3. The multi-mode vibration controller for steel pipe tower members of transmission lines according to claim 1, characterized in that: The first telescopic rod (9) adjusts its own length so that the vibration frequency of the vibrating arm (5) and the vibrating block (6) is consistent with the measured frequency of the steel pipe (1). At this time, the second telescopic rod (10) extends and the locking block (11) is tightened, so as to realize the resonance of the vibrating arm (5), the vibrating block (6) and the steel pipe (1), dissipate energy, and suppress vortex vibration.

4. The multi-mode vibration controller for steel pipe tower members of transmission lines according to claim 1, characterized in that: The multi-vibration control instrument for steel pipe tower members of the transmission line also includes a connecting device, which includes a connecting block (7) and several rolling wheels (8). Several rolling wheels (8) are arranged on the outer periphery of the connecting block (7). The connecting block (7) is vertically installed on the outer periphery of the vibrating arm (5) and moves with the first telescopic rod (9).

5. The multi-mode vibration controller for transmission line steel pipe tower members according to claim 1, characterized in that: The fixing device includes a first fixing device (2) and a second fixing device connected by bolts (14).

6. The multi-mode vibration controller for steel pipe tower members of transmission lines according to claim 5, characterized in that: The second fixing device includes a second fixing device a (3) and a second fixing device b (4). The second fixing device a (3) and the first fixing device (2) are both arc-shaped and are arranged opposite to each other to form a clamp structure.

7. The multi-mode vibration controller for steel pipe tower members of transmission lines according to claim 6, characterized in that: The second fixing device b (4) is a hollow structure, and an acceleration sensor (13) and a telescopic device are installed inside it.

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