Pneumatic damping device for aeolian vibration of steel tube tower rod piece

Abstract

The utility model belongs to the field of pneumatic vibration reduction, and provides a pneumatic vibration reduction device for aeolian vibration of a steel tube tower rod piece, which comprises a pneumatic barrier plate and an annular plate, the number of the pneumatic blocking plates is at least two, and the pneumatic blocking plates are arranged on the outer surface of the steel pipe in the axial direction of the steel pipe tower rod piece and symmetrically distributed along the plane where the inserting plates belong. A plurality of grooves are formed in the side, making contact with the outer surface of the steel pipe, of the pneumatic baffle. A plurality of clamping grooves are formed in the annular plate, and the number of the clamping grooves is the same as that of the pneumatic baffles. The annular plate is clamped on the outer side of the pneumatic barrier plate so as to fix the pneumatic barrier plate to be tightly attached to the steel pipe, the structure is simple, construction is convenient, and meanwhile the effects of changing a flow separation point and disturbing a wake flow vortex structure are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of pneumatic damping, and particularly relates to a pneumatic damping device for the aeolian vibration of steel pipe tower members. Background Technique

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] Steel pipe towers are often used in UHV AC line projects. For members with a large slenderness ratio and a small design stress in the steel pipe tower, socket plates are used for connection, and transverse aeolian vibration perpendicular to the socket plate is likely to occur. This continuous and repeated vibration will cause the loosening of the bolt connection of the member or the fatigue failure of the connection plate, and thus pose a hidden danger to the safe operation of the power grid.

[0004] The aeolian vibration of steel pipe tower members is essentially the vortex-induced vibration of a circular pipe. At present, the main treatment measures are to add support members or install spoilers to the steel pipe tower members. Adding support members changes the natural vibration frequency of the members and can cure the aeolian vibration problem, but the design and construction are relatively complex; the spoiler changes the surface eddy current of the members and has a certain inhibitory effect on the vibration of the steel pipe tower members, but the installation quantity restricts its inhibitory effect and cannot cure the wind vibration problem. Content of the Utility Model

[0005] In order to solve the technical problems existing in the above background technique, the utility model provides a pneumatic damping device for the aeolian vibration of steel pipe tower members, which has a simple structure, convenient construction, and at the same time has the functions of changing the flow separation point and disturbing the wake vortex structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A pneumatic damping device for the aeolian vibration of steel pipe tower members, wherein the steel pipe tower member is composed of a steel pipe and socket plates at both ends thereof;

[0008] The pneumatic damping device for the aeolian vibration of steel pipe tower members includes: a pneumatic baffle and an annular plate;

[0009] The number of the pneumatic baffles is at least two, the pneumatic baffles are arranged on the outer surface of the steel pipe along the axial direction of the steel pipe tower member, and are symmetrically arranged along the plane where the socket plate is located;

[0010] A plurality of grooves are arranged on one side of the pneumatic baffle in contact with the outer surface of the steel pipe;

[0011] A plurality of clamping grooves are arranged inside the annular plate, and the number of the clamping grooves is the same as that of the pneumatic baffles;

[0012] The annular plate is clamped outside the pneumatic baffle to fix the pneumatic baffle tightly against the steel pipe.

[0013] As an implementation manner, the cross-section of the pneumatic baffle is rectangular.

[0014] As an implementation manner, the groove is a rectangular groove.

[0015] As an implementation manner, the grooves are distributed periodically along the length direction of the pneumatic baffle.

[0016] As an implementation manner, the height of the pneumatic baffle is 1 / 4 to 1 / 3 of the radius of the steel pipe.

[0017] As an implementation manner, the included angle between the pneumatic baffle and the insertion plate is set between 40° and 70°.

[0018] As an implementation manner, the number of the annular plates is at least two.

[0019] As an implementation manner, when the number of the annular plates is two, the annular plates are clamped at both ends of the pneumatic baffle.

[0020] As an implementation manner, when the number of the annular plates is at least three, two of the annular plates are clamped at both ends of the pneumatic baffle; the remaining annular plates are arranged at equal intervals along the length direction of the pneumatic baffle.

[0021] As an implementation manner, the annular plate restricts the vibration fundamental frequency of the pneumatic baffle to be greater than twice the fundamental frequency of the steel pipe.

[0022] The beneficial effects of the present utility model are as follows:

[0023] The present utility model uses an annular plate to clamp and fix the pneumatic baffle tightly against the steel pipe. This connection method makes the structure of the entire pneumatic damping device simple and the construction convenient; moreover, it also uses the outside of the pneumatic baffle to change the flow separation point at the outer boundary of the steel pipe, and uses the flow in the grooves provided on the inner side in contact with the outer surface of the steel pipe to disrupt the wake vortices, so that the pneumatic damping device has the functions of changing the flow separation point and disrupting the wake vortex structure at the same time.

[0024] The advantages of the additional aspects of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0025] The specification drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0026] Figure 1 It is a schematic structural diagram of the pneumatic damping device for the aeolian vibration of the steel pipe tower member in the embodiment of the present utility model;

[0027] Figure 2 It is a side view of the pneumatic baffle in the embodiment of the present utility model;

[0028] Figure 3 It is a front view of the pneumatic baffle in the embodiment of the present utility model;

[0029] Figure 4 It is a schematic structural diagram of the annular plate in the embodiment of the present utility model.

[0030] Wherein, 1. Pneumatic baffle; 101. Groove; 2. Annular plate; 201. Card slot. Specific implementation manners

[0031] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0033] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present utility model. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] According to Figures 1-4 , the embodiment of the present utility model provides a pneumatic damping device for the aeolian vibration of a steel pipe tower member, wherein the steel pipe tower member is composed of a steel pipe and the insertion plates at both ends thereof;

[0035] The pneumatic damping device for the aeolian vibration of the steel pipe tower member includes: a pneumatic baffle 1 and an annular plate 2;

[0036] The number of the pneumatic baffles 1 is at least two, and the pneumatic baffles 1 are arranged on the outer surface of the steel pipe along the axial direction of the steel pipe tower member and are symmetrically arranged along the plane where the insertion plates are located, as Figure 3 shown;

[0037] A number of grooves 101 are provided on the side of the pneumatic baffle 1 in contact with the outer surface of the steel pipe;

[0038] Inside the annular plate 2, there are several card slots 201, and the number of the card slots 201 is the same as that of the pneumatic baffle plates 1, as Figure 4 shown;

[0039] The annular plate 2 is clamped on the outer side of the pneumatic baffle plate 1 to fix the pneumatic baffle plate 1 tightly against the steel pipe.

[0040] In this embodiment, the annular plate is used to clamp and fix the pneumatic baffle plate tightly against the steel pipe. This connection method makes the structure of the whole pneumatic damping device simple and the construction convenient; moreover, it also changes the flow separation point at the outer boundary of the steel pipe by using the outer side of the pneumatic baffle plate, and disrupts the wake vortex by using the flow in the grooves arranged on the inner side in contact with the outer surface of the steel pipe, so that the pneumatic damping device has the functions of changing the flow separation point and disrupting the wake vortex structure at the same time.

[0041] According to Figure 2 , in this embodiment, the cross-section of the pneumatic baffle plate 1 is rectangular. The groove 101 is a rectangular groove. In this way, by using the blunt outer side of the rectangle, the efficiency of changing the flow separation point at the outer boundary of the steel pipe is improved, and the effect of disrupting the wake vortex by the flow in the rectangular groove is better.

[0042] It should be noted here that in other embodiments, the cross-sectional shape of the pneumatic baffle plate and the shape of the groove can be set to other shapes by those skilled in the art according to the actual situation. For example, the outer side of the pneumatic baffle plate is wavy, etc., and the groove is diamond-shaped or square-shaped, etc., which will not be elaborated here.

[0043] In the embodiment of the present utility model, the grooves 101 are distributed periodically along the length direction of the pneumatic baffle plate 1. In this way, it can make the airflow not easily generate wake vortices and make the airflow more balanced.

[0044] It can be understood here that in other embodiments, the layout method of the grooves on the pneumatic baffle plate can also be specifically set according to the actual situation.

[0045] In the embodiment of the present utility model, the height of the pneumatic baffle plate 1 is 1 / 4 to 1 / 3 of the radius of the steel pipe. The included angle between the pneumatic baffle plate 1 and the insertion plate is set between 40° and 70°.

[0046] In this way, the whole pneumatic damping device has a small size, does not affect the appearance of the steel pipe tower, and can improve the stability of the airflow.

[0047] In this embodiment, the number of the annular plates 2 is at least two.

[0048] When the number of the annular plates 2 is two, the annular plates 2 are clamped at both ends of the pneumatic baffle plate 1.

[0049] When the number of the annular plates 2 is at least three, two of the annular plates 2 are clamped at both ends of the pneumatic baffle plate 1; the remaining annular plates 2 are arranged at equal intervals along the length direction of the pneumatic baffle plate 1.

[0050] In this embodiment, the annular plate 2 restricts the vibration fundamental frequency of the pneumatic baffle plate 1 to be greater than twice the steel pipe fundamental frequency.

[0051] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An aerodynamic damping device for the galloping vibration of steel tubular tower members, wherein, The steel tubular tower member is composed of a steel tube and the gusset plates at both ends thereof; characterized in that, the pneumatic damping device for the aeolian vibration of the steel tubular tower member comprises: a pneumatic baffle plate and an annular plate; The number of the pneumatic baffle plates is at least two, the pneumatic baffle plates are arranged on the outer surface of the steel tube along the axial direction of the steel tubular tower member, and are symmetrically arranged along the plane where the gusset plates are located; A plurality of grooves are arranged on one side of the pneumatic baffle plate in contact with the outer surface of the steel tube; A plurality of clamping grooves are arranged inside the annular plate, and the number of the clamping grooves is the same as that of the pneumatic baffle plates; The annular plate is clamped on the outer side of the pneumatic baffle plate to fix the pneumatic baffle plate to be closely attached to the steel tube.

2. The pneumatic damping device for the aeolian vibration of the steel pipe tower member according to claim 1, characterized in that, The cross section of the pneumatic baffle plate is rectangular.

3. The aerodynamic damping device for the vortex-induced vibration of the steel tubular tower member according to claim 1 or 2, characterized in that, The groove is a rectangular groove.

4. The pneumatic damping device for the aeolian vibration of the steel pipe tower member according to claim 1, characterized in that, The grooves are periodically distributed along the length direction of the pneumatic baffle plate.

5. The pneumatic damping device for the aeolian vibration of the steel pipe tower member according to claim 1, characterized in that, The height of the pneumatic baffle plate is 1 / 4 to 1 / 3 of the radius of the steel tube.

6. The aerodynamic damping device for the aeolian vibration of the steel pipe tower member according to claim 1, wherein The included angle between the pneumatic baffle plate and the gusset plate is set between 40° and 70°.

7. The aerodynamic damping device for the steel pipe tower member against buffeting vibration according to claim 1, characterized in that, The number of the annular plates is at least two.

8. The aerodynamic damping device for the light wind vibration of the steel pipe tower member according to claim 7, characterized in that, When the number of the annular plates is two, the annular plates are clamped at both ends of the pneumatic baffle plate.

9. The aerodynamic damping device for the steel pipe tower member against aeolian vibration according to claim 7, characterized in that, When the number of the annular plates is at least three, two of the annular plates are clamped at both ends of the pneumatic baffle plate; the remaining annular plates are arranged at equal intervals along the length direction of the pneumatic baffle plate.

10. The pneumatic damping device for the aeolian vibration of the steel pipe tower member according to claim 1, characterized in that, The annular plate restricts the vibration fundamental frequency of the pneumatic baffle plate to be greater than twice the fundamental frequency of the steel tube.

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