Built-in tuning liquid damping system of power transmission tower

Abstract

The invention provides a power transmission tower built-in tuning liquid damping system which comprises at least one power transmission tower built-in tuning liquid damping unit, and the power transmission tower built-in tuning liquid damping unit is arranged on a tower head of a power transmission tower and becomes a part of the tower head. The power transmission tower built-in tuning liquid damping unit comprises a hollow main rod, a hollow inclined rod and a hollow transverse rod, the interior of the main rod communicates with the interior of the inclined rod, and liquid is stored in the main rod and the inclined rod; the interiors of the cross rods are not communicated with the interiors of the main rods and the interiors of the inclined rods. According to the built-in tuning liquid damping system of the power transmission tower, vibration of the power transmission tower caused by strong wind can be reduced, the self-adaptive vibration reduction effect of the power transmission tower under different forms of power transmission towers and different incoming flow wind speeds in the actual environment is achieved, and line breaking or tower falling accidents caused by too large vibration are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission tower vibration reduction, and in particular relates to a transmission tower built-in tuning liquid damping system. Background Art

[0002] With the development of renewable energy power generation and the construction of smart grids, the demand for the construction of overhead transmission lines has become more urgent, and the height of transmission towers has become higher and higher. As a result, there are more and more safety issues in the operation of transmission lines. Transmission towers are lattice-type wind-sensitive structures. When affected by wind, they are prone to vibration, causing the transmission lines to bear unbalanced tension and the stress condition of the transmission towers themselves to change, which can easily cause line breaks or collapse accidents.

[0003] In order to avoid transmission line disconnection or collapse accidents, the main method now is to arrange an external tuned mass damper on the top of the tower. However, the wind speed at the top of the tower itself is high, causing the damper itself to bear a large wind load, which is not conducive to the design of the transmission tower. Therefore, it is necessary to improve it. Summary of the invention

[0004] The purpose of the present invention is to provide a built-in tuned liquid damping system for reducing wind vibration on a transmission tower under actual conditions. A tuned liquid damping structural system for reducing wind vibration can be provided according to transmission towers of different types and different service lives, thereby providing protection for the safety of the transmission towers.

[0005] To this end, the above-mentioned purpose of the present invention is achieved through the following technical solutions: A transmission tower built-in tuning liquid damping system, comprising at least one transmission tower built-in tuning liquid damping unit, wherein the transmission tower built-in tuning liquid damping unit is arranged on the tower head of the transmission tower and becomes a part of the tower head; The transmission tower built-in tuned liquid damping unit comprises: a hollow main rod, a hollow diagonal rod and a hollow cross rod. The main rod is generally vertical, and the diagonal rod is tilted on the main rod; the main rod and the diagonal rod form an upward support for the cross rod; The interior of the main rod is connected to the interior of the oblique rod, and liquid is stored in the main rod and the oblique rod; the interior of the cross rod is not connected to the interior of the main rod or the interior of the oblique rod; A horizontally arranged control panel is provided on the crossbar, main pole or diagonal pole, and a central controller, a battery, a first accelerometer, a second accelerometer and a liquid pump are provided on the control surface panel; the first accelerometer and the second accelerometer are respectively arranged to be parallel to the two symmetric axes of the tower head (that is, parallel to the crossarm direction and perpendicular to the crossarm direction) to test the acceleration time course in two directions of the transmission tower; the liquid filling pipe of the liquid pump extends to the bottom of the main pole or the bottom of the diagonal pole, and the liquid outlet pipe of the liquid pump extends to the bottom of the crossbar; the battery provides power support for the central controller, the first accelerometer, the second accelerometer and the liquid pump; The central controller is used to analyze the acceleration time history of the first accelerometer and the second accelerometer to obtain the natural frequency of the transmission tower, so as to start the liquid pump to adjust the height of the liquid level in the crossbar to achieve tuned damping vibration reduction; The crossbar is provided with a grille, which at least covers the lower half of the crossbar, and an array of small holes is provided on the grille.

[0006] While adopting the above technical solutions, the present invention may also adopt or combine the following technical solutions: As a preferred technical solution of the present invention: a solar panel is provided on the main rod or the inclined rod, and the solar panel is electrically connected to the battery.

[0007] As a preferred technical solution of the present invention: at least one layer of transmission tower built-in tuning liquid damping unit is arranged from top to bottom on the upper part of the transmission tower.

[0008] As a preferred technical solution of the present invention: the crossbar includes frame bars on all sides and two connecting bars on the diagonal lines of the frame, and the frame bars, the frame bars and the connecting bars, and the connecting bars are all connected.

[0009] As a preferred technical solution of the present invention: the transmission tower is a stem-shaped tower.

[0010] The present invention provides a transmission tower built-in tuned liquid damping system, which can reduce the transmission tower vibration caused by strong winds, realizes the adaptive transmission tower vibration reduction effect under different forms of transmission towers and different incoming wind speeds in actual environments, and avoids line disconnection or tower collapse accidents caused by excessive vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a diagram showing the arrangement of the built-in tuned liquid damping system of the transmission tower provided by the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A; Figure 3 It is a connection diagram of the components on the control panel; Figure 4 It is a plan view of the crossbar; Figure 5 is a diagram of a cross section of a crossbar; Figure 6 The structure diagram of the grille is shown in FIG. In the figure: 110-tower head; 210-main pole; 220-diagonal pole; 230-cross pole; 231-frame pole; 232-connecting pole; 233-grid; 233a-small hole; 240-partition; 250-control panel; 251-central controller; 252-battery; 253-first accelerometer; 254-second accelerometer; 255-liquid pump; 255a-liquid adding pipe; 260-solar panel; 270-liquid. DETAILED DESCRIPTION

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 As shown, at least one transmission tower built-in tuning liquid damping unit is arranged on the tower head 110 of the transmission tower, and the transmission tower built-in tuning liquid damping unit forms a part of the tower head 110 of the transmission tower. At least one layer of transmission tower built-in tuning liquid damping units is arranged from top to bottom on the upper part of the transmission tower. In this embodiment, only one layer is shown, but in other embodiments, multiple layers can also be arranged.

[0014] The transmission tower built-in tuned liquid damping unit includes a hollow main rod 210, a hollow diagonal rod 220 and a hollow cross rod 230; the main rod 210 and the diagonal rod 220 form an upward support for the cross rod 230; the interior of the main rod 210 is connected with the interior of the diagonal rod 220; the liquid 270 is stored in the main rod 210 and the diagonal rod 220; the interior of the cross rod 230 is not connected with the interior of the main rod 210 and the diagonal rod 220, for example, a partition 240 is set to separate them, so as to separate the liquid storage space and the working space of the built-in tuned liquid damping unit of the transmission tower.

[0015] A control panel 250 is installed below the partition 240, and a central controller 251, a battery 252, a first accelerometer 253, a second accelerometer 254 and a liquid pump 255 are provided on the control panel 250; the first accelerometer 253 and the second accelerometer 254 are respectively arranged to be parallel to the two symmetry axes of the tower head 110 (that is, parallel to the cross arm direction and perpendicular to the cross arm direction) to test the acceleration time course in two directions of the transmission tower; the liquid addition pipe 255a of the liquid pump 255 extends to the bottom of the main pole 210 or the bottom of the inclined pole 220, and the liquid outlet pipe of the liquid pump 255 extends to the bottom of the cross bar 230; the battery 252 provides power support for the central controller 251, the first accelerometer 253, the second accelerometer 254 and the liquid pump 255.

[0016] The central controller 251 is used to analyze the acceleration time history of the first accelerometer 253 and the second accelerometer 254 to obtain the natural frequency of the transmission tower, so as to start the liquid pump 255 to adjust the height of the liquid level in the cross bar 230 to achieve tuned damping vibration reduction.

[0017] The crossbar 230 includes frame bars 231 disposed on all sides and used to form a frame, and two connecting bars 232 disposed on the diagonal lines of the frame. The frame bars 231 , the frame bars 231 and the connecting bars 232 , and the connecting bars 232 and the connecting bars 232 are all connected.

[0018] The crossbar 230 has a grille 233, which covers at least the lower half of the crossbar 230. The grille 233 is provided with a small hole array 233a to achieve the vibration reduction effect of the transmission tower. The liquid in the crossbar 230 will not flow from the crossbar 230 into the main rod 210 or the inclined rod 220, so that the flow of the liquid can only be adjusted by a liquid pump, and no free flow can occur.

[0019] A solar panel 260 may also be provided on the main rod 210 or the diagonal rod 220 , and the solar panel 260 is connected to the battery 252 .

[0020] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A transmission tower built-in tuned liquid damping system, characterized in that: The transmission tower built-in tuned liquid damping system comprises at least one transmission tower built-in tuned liquid damping unit, and the transmission tower built-in tuned liquid damping unit is arranged on the tower head of the transmission tower and becomes a part of the tower head; The transmission tower built-in tuned liquid damping unit comprises: a hollow main rod, a hollow diagonal rod and a hollow cross rod. The main rod is generally vertical, and the diagonal rod is tilted on the main rod; the main rod and the diagonal rod form an upward support for the cross rod; The interior of the main rod is connected to the interior of the oblique rod, and liquid is stored in the main rod and the oblique rod; the interior of the cross rod is not connected to the interior of the main rod or the interior of the oblique rod; A horizontally arranged control panel is provided on the crossbar, main bar or diagonal bar, and a central controller, a battery, a first accelerometer, a second accelerometer and a liquid pump are provided on the control surface panel; the first accelerometer and the second accelerometer are respectively arranged to be parallel to the two symmetric axes of the tower head; the liquid filling pipe of the liquid pump extends to the bottom of the main bar or the bottom of the diagonal bar, and the liquid outlet pipe of the liquid pump extends to the bottom of the crossbar; the battery provides power support for the central controller, the first accelerometer, the second accelerometer and the liquid pump; The central controller is used to analyze the acceleration time history of the first accelerometer and the second accelerometer to obtain the natural frequency of the transmission tower, so as to start the liquid pump to adjust the height of the liquid level in the crossbar to achieve tuned damping vibration reduction; The crossbar is provided with a grille, which at least covers the lower half of the crossbar, and an array of small holes is provided on the grille.

2. The transmission tower built-in tuned liquid damping system according to claim 1, characterized in that: A solar panel is provided on the main rod or the oblique rod, and the solar panel is electrically connected to the battery.

3. The transmission tower built-in tuned liquid damping system according to claim 1, characterized in that: At least one layer of transmission tower built-in tuning liquid damping units is arranged from top to bottom on the upper part of the transmission tower.

4. The transmission tower built-in tuned liquid damping system according to claim 1, characterized in that: The crossbar comprises frame bars on all sides and two connecting bars on the diagonal lines of the frame. The frame bars are connected to each other, the frame bars are connected to the connecting bars, and the connecting bars are connected to each other.

5. The transmission tower built-in tuned liquid damping system according to claim 1, characterized in that: The transmission tower is a stem-shaped tower.

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