An adjustable wind vibration control device for steel pipe components of transmission towers

Abstract

This invention belongs to the field of wind-resistant design for transmission lines and provides an adjustable wind-vibration control device for steel pipe components of transmission towers. The device, fitted over the steel pipe component, includes two collars. Two baffles are positioned between the two collars along the axial direction of the steel pipe component. Each collar comprises two semi-circular collars connected by collar connecting bolts. A pivot support is provided on the outer circumference of each semi-circular collar. The pivot support includes a base and two cover plates. The base is mounted on the semi-circular collar and connected to the cover plates by a pin. The space formed by the base and cover plates is used to install the baffles. In application, the two cover plates are opened, and the windward angle of the baffles is adjusted according to the intensity of vibration of the steel pipe component. After adjustment, the two cover plates are locked together by the cover plate connecting bolts. This invention achieves the purpose of suppressing wind-vibration of the component by controlling the angle of the baffles to change the aerodynamic shape of the component.

Description

Technical Field

[0001] This invention belongs to the field of wind-resistant design of power transmission lines, and specifically relates to an adjustable wind vibration control device for steel pipe components of transmission towers. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Transmission towers are the supporting structures for overhead transmission lines and an important component of the power grid. Steel pipe towers primarily use circular cross-section steel pipe components, connected by flanges, bolts, or welding. Due to the high cross-sectional stiffness, good stress characteristics, clear force transmission, and aesthetically pleasing appearance of steel pipe components, they are widely used in transmission lines of different voltage levels, especially in ultra-high voltage transmission towers, long-span transmission towers, and urban power grid poles. However, the circular cross-section components of steel pipe towers are prone to crosswind vibration caused by Karman vortex streets at low wind speeds. When the dominant frequency of vortex shedding is close to the natural frequency of the circular cross-section component, vortex-induced resonance occurs. Long-term vibration of the circular cross-section components can easily lead to fatigue failure in welds, joints, and other parts, and in severe cases, even tower collapse.

[0004] To avoid or mitigate this risk, a traditional approach is to install several fixed steel aerodynamic devices on the components experiencing wind-induced vibration, altering their aerodynamic shape and suppressing vibration. However, this traditional method has the following drawbacks or shortcomings:

[0005] Different components have different starting wind speeds. Fixed turbulence devices have a relatively fixed and limited impact on the aerodynamic shape of the components. They cannot flexibly change the aerodynamic shape of the components, resulting in a limited range of applications and unsatisfactory vibration suppression effect on some components.

[0006] The installation of numerous turbulence devices (generally 5 to 8 sets) made of steel not only complicates the installation process but also increases the additional load on the poles, causing changes in the stress on the poles. This poses a significant safety hazard to the existing transmission towers. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes an adjustable wind-induced vibration control device for transmission tower steel pipe components. This invention employs a rotatable baffle, and by controlling the angle of the baffle, the aerodynamic shape of the component is altered, thereby suppressing wind-induced vibration of the member.

[0008] According to some embodiments, the present invention adopts the following technical solution:

[0009] An adjustable wind vibration control device for steel pipe components of transmission towers, the wind vibration control device is sleeved on the outside of the steel pipe component and includes two collars, with two baffles provided between the two collars along the axial direction of the steel pipe component;

[0010] The collar includes two semi-circular collars connected by collar connecting bolts. Each semi-circular collar has a rotating shaft support on its outer circumference. The rotating shaft support includes a base and two cover plates. The base is set on the semi-circular collar and the base and cover plates are connected by a pin. The space formed by the base and cover plates is used to install a spoiler.

[0011] In application, the two cover plates are opened, and the windward angle of the spoiler is adjusted according to the intensity of vibration of the steel pipe component. After adjustment, the two cover plates are locked together by the cover plate connecting bolts.

[0012] Furthermore, support rubber pads are provided on both the inner surface and the inner side of the cover plate.

[0013] Furthermore, the spoiler includes a spoiler body, and the spoiler body has rotating shafts at both ends.

[0014] Furthermore, the inner surface of the base is a semi-circular ring, wherein the inner surface is the contact surface with the rotating shaft.

[0015] Furthermore, the space formed by the base and the cover plate is used to install the rotating shaft.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention uses an adjustable spoiler that can rotate 360° around its own central axis. Compared with a fixed spoiler, this device is more flexible in adjusting the aerodynamic shape and has a wider range of influence, which can significantly improve the applicability of the wind vibration control device and has a better effect in suppressing the wind vibration of components.

[0018] This invention requires only one set of composite material flow-disrupting device, which is simple to install and easy to operate; moreover, the device is lighter in weight, the additional load on the components is small, and the impact on existing components is minimal. Attached Figure Description

[0019] 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 improper limitation of the invention.

[0020] Figure 1 A schematic diagram (front view) of a wind-induced vibration control device for adjustable transmission tower steel pipe components;

[0021] Figure 2 This is a schematic diagram (top view) and a partial enlarged view of the collar structure;

[0022] Figure 3 This is a schematic diagram (front view) of the collar structure;

[0023] Figure 4 This is a schematic diagram (perspective view) of the spoiler structure;

[0024] In the diagram, 1-steel pipe component, 2-collar ring, 3-spoiler, 4-semi-circular collar, 5-collar ring rubber pad, 6-shaft support, 7-collar ring connecting bolt, 8-collar ring connecting bolt hole, 9-base, 10-cover plate, 11-pin, 12-cover plate connecting bolt, 13-support rubber pad, 14-spoiler body, 15-shaft. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the term "comprising" is used in this specification, it indicates the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] In this invention, terms such as "welding," "connecting," and "joining" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0029] like Figure 1 As shown in this embodiment, an adjustable wind-induced vibration control device for transmission tower steel pipe components includes two collars 2 and two baffles 3. The two collars 2 are installed on the outside of the steel pipe component 1, and the two baffles 3 are installed between the two collars 2. This device is a single unit, located at the axial center of the steel pipe component 1, and the length of the baffles 3 can be 1 / 5 to 1 / 2 of the total length of the steel pipe component 1.

[0030] like Figure 2As shown, the collar 2 includes: two semi-circular collars 4, collar rubber pads 5, and a rotating shaft support 6. The rotating shaft support 6 is welded to the outside of the semi-circular collars 4, and the two semi-circular collars 4 are connected by collar connecting bolts 7 to form a ring. The collar rubber pads 5 are disposed between the steel pipe component 1 and the semi-circular collars 4.

[0031] like Figure 2 , Figure 3 As shown, the rotating shaft support 6 includes: a base 9, two cover plates 10, a pin 11, cover plate connecting bolts 12, and a support rubber pad 13. The base 9 is welded to the semi-circular collar 4; the two cover plates 10 are respectively connected to the base 9 through the pins 11; the two cover plates 10 can be opened and closed; when the two cover plates 10 are closed, they are locked by the cover plate connecting bolts 12; support rubber pads 13 are provided on the inner surfaces of the base 9 and the cover plates 10.

[0032] like Figure 4 As shown, the spoiler 3 includes a spoiler body 14 and a rotating shaft 15. The cross-section of the spoiler body 14 can be rhomboid, rectangular, or elliptical, and it is made of composite material; the cross-section of the rotating shaft 15 is circular, and it is also made of composite material. The center of the cross-section of the rotating shaft 15 coincides with the center of the cross-section of the spoiler body 14.

[0033] The adjustability described in this embodiment is achieved by rotating the spoiler body 14 around its own central axis. When the cover plate 10 is in the open state, the windward angle of the spoiler body 14 can be rotated 360° around the rotating shaft 15; after the windward angle of the spoiler body 14 is adjusted, the cover plate can be locked by the cover plate connecting bolts 12, at which time the spoiler body is in the locked state; the windward angle is determined by the degree of vibration of the steel pipe component.

[0034] The basic technical idea of ​​this invention is to use a rotatable spoiler to change the aerodynamic shape of the component by controlling the angle of the spoiler, thereby suppressing wind vibration of the rod. For example, the spoiler body or the cross-section of the shaft may be other than the shape mentioned above, the shaft support and collar may be other types or connection methods mentioned above, the entire device may be made of other materials mentioned above, and the device may be applied to steel pipe components other than transmission towers. All other modifications, substitutions or alterations made to the above structure of this patent based on the above content of this patent, according to ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​this patent, shall fall within the protection scope of this patent.

Claims

1. An adjustable wind-induced vibration control device for steel pipe components of transmission towers, wherein the wind-induced vibration control device is sleeved on the outside of the steel pipe component, characterized in that, It includes two collars, and two baffles are provided between the two collars along the axial direction of the steel pipe component; The collar includes two semi-circular collars connected by collar connecting bolts. Each semi-circular collar has a rotating shaft support on its outer circumference. The rotating shaft support includes a base and two cover plates. The base is set on the semi-circular collar and the base and cover plates are connected by a pin. The space formed by the base and cover plates is used to install a spoiler. The spoiler includes a spoiler body and a rotating shaft; the cross-section of the spoiler body is rhomboid, rectangular, or elliptical; the cross-section of the rotating shaft is circular. The spoiler body has rotating shafts at both ends; the center of the cross-section of the rotating shaft coincides with the center of the cross-section of the spoiler body. In application, the two cover plates are opened, and the windward angle of the spoiler is adjusted according to the intensity of vibration of the steel pipe component. After adjustment, the two cover plates are locked together by the cover plate connecting bolts.

2. The adjustable transmission tower steel pipe component wind vibration control device according to claim 1, characterized in that, The wind vibration control device is fitted around the middle of the steel pipe component.

3. The adjustable transmission tower steel pipe component wind vibration control device according to claim 1, characterized in that, The length of the spoiler is 1 / 5 to 1 / 2 of the total length of the steel pipe component.

4. The adjustable transmission tower steel pipe component wind vibration control device according to claim 1, characterized in that, A rubber pad is provided between the steel pipe component and the semi-circular collar.

5. The adjustable transmission tower steel pipe component wind vibration control device according to claim 1, characterized in that, The base is welded onto a semi-circular collar.

6. The adjustable transmission tower steel pipe component wind vibration control device according to claim 1, characterized in that, The inner surface of the base is a semi-circular ring, which is the contact surface with the rotating shaft.

7. The adjustable transmission tower steel pipe component wind vibration control device according to claim 6, characterized in that, Support rubber pads are provided on both the inner surface and the inner side of the cover plate.

8. The adjustable transmission tower steel pipe component wind vibration control device according to claim 1, characterized in that, The space formed by the base and the cover plate is used to install the rotating shaft.

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