Power transmission tower insulator chain windage yaw suppression device and system

Abstract

The utility model discloses a windage yaw suppression device and system for an insulator string of a power transmission tower. The technical scheme is that the windage yaw suppression device comprises a main insulator string and windage yaw suppression structures symmetrically arranged on the two sides of the main insulator string; the windage yaw suppression structure on each side comprises a damping cavity, a sliding rod and an air spring, the air spring is connected to the bottom of the main insulator string, the damping cavity comprises a first cavity body and a second cavity body, damping liquid and blades are arranged in the first cavity body, a ball screw pair is arranged in the second cavity body, one end of the ball screw pair is connected with the blades, and the other end of the ball screw pair is connected with the sliding rod. The other end is connected with the sliding rod. According to the utility model, a simple and clear spring-damping structure is adopted, the swinging intensity of the insulator is effectively weakened, the windage yaw is limited, and the safe and stable operation of a power transmission line is maintained.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission towers, in particular to a wind deflection suppression device and system for insulator strings of transmission towers. Background Technique

[0002] The statements in this part only mention the background technique related to the utility model and do not necessarily constitute the prior art.

[0003] The transmission line is in a complex and changeable natural environment for a long time and is vulnerable to various meteorological disasters. Especially under the action of strong winds, the insulator string on the transmission tower will have a wind deflection phenomenon, shortening the electrical distance from the tower body, resulting in discharge and tripping, damaging the normal operating conditions of the line, and posing a risk to the stability of the power supply system. Therefore, it is of great significance to adopt effective anti-wind deflection measures in the transmission line project.

[0004] Regarding the problem of wind deflection discharge of transmission lines, the main measures currently taken are as follows: 1. Install a heavy weight at the bottom of the insulator string. This method uses gravity to reduce the wind deflection angle, but the effect is limited and it will bring a large additional gravity to the cross arm. 2. Install guy wires. This method can block the wind deflection, but it is more troublesome to install and causes an unbalanced effect on the tower body. 3. Use a V-shaped insulator string. This method has a good application effect, but it will increase the length of the insulator string, and the application range is limited and it will even fail in some cases. Summary of the Utility Model

[0005] In order to solve the deficiencies of the prior art, the first aspect of the utility model provides a wind deflection suppression device for an insulator string of a transmission tower, which uses the non-linearity of the air spring to absorb vibration of the insulator wind deflection to a greater extent, uses the shear thickening property of non-Newtonian fluid to enhance the energy dissipation effect, effectively weakens the severity of insulator swing, restricts wind deflection, and maintains the safe and stable operation of the transmission line.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A wind deflection suppression device for an insulator string of a transmission tower includes a main insulator string and wind deflection suppression structures symmetrically arranged on both sides of the main insulator string; each side of the wind deflection suppression structure includes a damping cavity, a slide rod, and an air spring. The air spring is connected to the bottom of the main insulator string. The damping cavity includes a first cavity and a second cavity. A ball screw pair is arranged in the first cavity, and damping liquid and blades are arranged in the second cavity. One end of the ball screw pair is connected to the blade, and the other end is connected to the slide rod.

[0008] As an implementation manner, the device further includes a first connecting plate and a second connecting plate. The upper end of the main insulator string is connected to one end of the first connecting plate, the other end of the first connecting plate is connected to the transmission tower, the lower end is connected to one end of the second connecting plate, and the other end of the second connecting plate is connected to the air spring.

[0009] As an implementation manner, the wind deflection suppression structure further includes a secondary insulator string, a connecting fitting, a first connecting rod, and a second connecting rod. The secondary insulator strings are symmetrically arranged on both sides of the main insulator string. The upper part of the secondary insulator string is connected to the transmission tower, and the lower part is connected to the connecting fitting. The upper part of the damping cavity is connected to one end of the first connecting rod, the other end of the first connecting rod is connected to the transmission tower, and the lower part of the damping cavity is connected to the connecting fitting through a sliding rod.

[0010] As an implementation manner, the second connecting rod and the position of the secondary insulator string are in a straight line.

[0011] As an implementation manner, the damping liquid uses a non-Newtonian fluid with shear thickening properties.

[0012] As an implementation manner, the ball screw pair includes a ball screw, a ball nut, and balls. The groove between the ball screw and the ball nut is clamped with balls. When moving, the linear motion of the ball nut will drive the balls to move along the ball screw.

[0013] As an implementation manner, a limit block is further arranged in the damping cavity, and the limit block is used to limit the movement range of the ball nut in the ball screw pair.

[0014] As an implementation manner, the materials of the wind deflection suppression structure are all made of insulating materials.

[0015] As an implementation manner, when the main insulator string does not deflect due to wind, the air spring is in a stretched state.

[0016] In the second aspect of the present invention, there is provided a wind deflection suppression system for a transmission tower insulator string, the purpose of which is to use the nonlinearity of the air spring to absorb vibration of the insulator wind deflection swing to a greater extent, use the shear thickening property of the non-Newtonian fluid to enhance the energy dissipation effect, effectively weaken the severity of the insulator swing, limit the wind deflection, and maintain the safe and stable operation of the transmission line.

[0017] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0018] A wind deflection suppression system for a transmission tower insulator string includes a wind deflection suppression device for a transmission tower insulator string as described in the first aspect.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The utility model adopts a simple and clear "spring - damper" structure. It utilizes the non - linearity of the air spring to absorb vibration of the insulator wind - deviation swing to a greater extent, and the greater the damping of the damping liquid to enhance the energy - dissipation effect, effectively reducing the severity of the insulator swing, restricting the wind - deviation, and maintaining the safe and stable operation of the transmission line.

[0021] 2. The utility model forms a stable triangular structure as a whole, maintaining a reasonable stress state under strong wind action, thereby restricting the change of the structural form and restricting the wind - deviation.

[0022] 3. The utility model is directly hinged to the transmission tower without increasing unbalanced tension. There is no need to perform operations such as drilling, the construction is simple, and it has good economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The attached drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0024] Figure 1 It is a schematic diagram of the overall structure of the wind - deviation suppression device for the insulator string of the transmission tower provided by the embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the damping cavity structure of the wind - deviation suppression device for the insulator string of the transmission tower provided by the embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the damping liquid and blades of the wind - deviation suppression device for the insulator string of the transmission tower provided by the embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the ball screw pair of the wind - deviation suppression device for the insulator string of the transmission tower provided by the embodiment of the utility model;

[0028] Among them, 1. First connecting plate; 2. Main insulator string; 3. Second connecting plate; 4. Secondary insulator string; 5. First connecting rod; 6. Damping cavity; 7. Slide bar; 8. Connecting fitting; 9. Second connecting rod; 10. Air spring; 11. Damping liquid; 12. Blade; 13. Partition board; 14. Ball screw; 15. Ball nut; 16. Limit block; 17. Ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of this application. 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 this application belongs.

[0030] It should be noted that the present utility model is a structural solution. Regarding each individual device involved therein, the specific structures for realizing their respective functions already exist in the prior art, and the protocols, software, or programs involved in their working processes also already exist in the prior art. Those skilled in the art are fully aware that the present utility model does not make any improvements to the individual devices, so it does not involve software content. Instead, it relies on the organic integration of various components into a whole, that is, it provides a structural solution.

[0031] As mentioned in the background art for the problem of wind-induced deflection discharge of transmission lines, the main measures currently taken are as follows: 1. Install a weight at the bottom of the insulator string. This method uses gravity to reduce the wind-induced deflection angle, but the effect is limited and it will bring a large additional gravity to the cross arm. 2. Install guy wires. This method can block the wind-induced deflection, but it is more troublesome to install and has an unbalanced effect on the tower body. 3. Use a V-shaped insulator string. This method has a good application effect, but it will increase the length of the insulator string, and the application range is limited. In some cases, it will even fail.

[0032] The above-mentioned solutions all have defects and deficiencies. The present utility model proposes a wind-induced deflection suppression device for insulator strings of transmission towers, which adopts a simple and clear "spring-damping" structure. It uses the nonlinearity of the air spring to absorb vibration of the insulator wind-induced deflection to a greater extent, and the greater the damping of the damping liquid 11, the stronger the energy dissipation effect, effectively weakening the severity of the insulator swing, restricting the wind-induced deflection, and maintaining the safe and stable operation of the transmission line. To solve the problem that the insulator string is prone to wind-induced deflection discharge under strong wind.

[0033] As Figure 1 shown in the schematic diagram of the overall structure of a wind-induced deflection suppression device for insulator strings of transmission towers, the device includes a main insulator string 2 and wind-induced deflection suppression structures symmetrically arranged on both sides of the main insulator string 2;

[0034] The upper end of the main insulator string 2 is connected to one end of the first connecting plate 1, the other end of the first connecting plate 1 is connected to the transmission tower, the lower end is connected to one end of the second connecting plate 3, and the other end of the second connecting plate 3 is connected to the wind-induced deflection suppression structure;

[0035] Each side of the wind-induced deflection suppression structure includes a secondary insulator string 4, a connecting fitting 8, a first connecting rod 5, a second connecting rod 9, a sliding rod 7, a damping cavity 6, and an air spring 10;

[0036] The lower end of the air spring 10 is connected to the second connecting plate 3 and is connected upward to the connecting fitting 8. The second connecting rod 9 and the position of the secondary insulator string 4 are in a straight line;

[0037] The secondary insulator string 4 is symmetrically arranged on both sides of the main insulator string 2 and forms a certain angle with the main insulator string 2 according to the actual situation; the upper part of the secondary insulator string 4 is connected to the transmission tower, and the lower part is connected to the connecting fitting 8;

[0038] The upper part of the damping cavity 6 is connected to one end of the first connecting rod 5, and the other end of the first connecting rod 5 is connected to the transmission tower, and the transmission tower bears the gravity of the damping cavity 6; the lower part of the damping cavity 6 is connected to the connecting fitting 8 through the sliding rod 7.

[0039] In this embodiment, the air spring 10 is in a stretched state during the non-working period, corresponding to the structural stress state.

[0040] Such as Figure 2 and Figure 3 As shown, the damping cavity 6 includes a first cavity and a second cavity. A partition 13 is provided between the first cavity and the second cavity, and the movement spaces of the damping liquid 11 and the ball nut 15 are separated by the partition 13;

[0041] In this embodiment, the damping liquid 11 uses a non-Newtonian fluid with shear thickening properties, and the higher the liquid moves, the higher its viscosity.

[0042] A ball screw pair is arranged in the first cavity. The ball screw pair includes a ball screw 14, a ball nut 15 and balls 17. The groove between the ball screw 14 and the ball nut 15 holds the balls 17. When moving, the linear movement of the ball nut 15 will drive the balls 17 to move along the ball screw 14.

[0043] A damping liquid 11 and blades 12 are arranged in the second cavity, and the blades 12 are bound to the part of the ball screw 14 extending into the damping liquid.

[0044] The inside of the ball nut 15 is rotationally connected through the balls 17 and the ball screw 14, and the outside is connected to the sliding rod 7. The movement of the sliding rod 7 will drive the ball nut 15 to move, thereby rotating the ball screw 14 and further driving the blades 12 to rotate, stirring the damping liquid 11.

[0045] In this embodiment, the wind deflection suppression structure is made of non-conductive insulating materials to prevent discharge.

[0046] When there is no wind deflection, the main insulator string 2 bears most of the gravity of the lower conductor, and the wind deflection suppression structure bears a small part of the gravity of the lower conductor. By reducing the force, the cross-sectional area of the wind deflection suppression device is reduced, and the material consumption is reduced.

[0047] A limit block 16 is also arranged in the damping cavity 6 to limit the movement range of the ball nut 15 in the ball screw pair and prevent it from colliding with the inner wall of the damping cavity 6.

[0048] It should be noted that when the device is connected to the transmission tower, hinged connection is adopted, which does not increase the unbalanced tension. There is no need to perform operations such as punching, the construction is simple, and it has good economy.

[0049] The working principle of the present utility model is as follows:

[0050] Under the action of wind, the main insulator string 2 deflects due to wind, swinging to one side. The air spring 10 on the other side, i.e., the tension side, is further stretched. Based on its own non-linear characteristics, the vibration absorption effect is amplified to hinder the trend of wind deflection. At the same time, the sliding rod 7 on the tension side moves upward, pushing the ball nut 15 to move synchronously. The ball 17 converts the linear motion of the ball nut 15 into rotation, driving the ball screw 14 and the blade 12 to rotate, thereby stirring the damping liquid 11 for energy consumption. The more violently the blade 12 rotates, the greater the damping of the damping liquid 11, enhancing the energy consumption effect.

[0051] After the wind deflection ends, the air pressure in the air spring 10 returns to the level of the non-working state, ensuring the normal operation of the device next time.

[0052] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A wind deflection suppression device for an insulator string of a transmission tower, characterized in that, It includes a main insulator string (2) and wind deflection suppression structures symmetrically arranged on both sides of the main insulator string (2); each side's wind deflection suppression structure includes a damping chamber (6), a slide bar (7), and an air spring (10). The air spring (10) is connected to the bottom of the main insulator string (2). The damping chamber (6) includes a first cavity and a second cavity. A ball screw pair is arranged in the first cavity, and a damping liquid (11) and a blade (12) are arranged in the second cavity. One end of the ball screw pair is connected to the blade (12), and the other end is connected to the slide bar (7).

2. The wind deflection suppression device for the insulator string of a transmission tower according to claim 1, wherein The device further includes a first connecting plate (1) and a second connecting plate (3). The upper end of the main insulator string (2) is connected to one end of the first connecting plate (1), the other end of the first connecting plate (1) is connected to the transmission tower, the lower end is connected to one end of the second connecting plate (3), and the other end of the second connecting plate (3) is connected to the air spring (10).

3. The wind deflection suppression device for the insulator string of a transmission tower according to claim 1, wherein, The wind deflection suppression structure further includes a secondary insulator string (4), a connecting fitting (8), a first connecting rod (5), and a second connecting rod (9). The secondary insulator strings (4) are symmetrically arranged on both sides of the main insulator string (2). The upper part of the secondary insulator string (4) is connected to the transmission tower, and the lower part is connected to the connecting fitting (8). The upper part of the damping chamber (6) is connected to one end of the first connecting rod (5), the other end of the first connecting rod (5) is connected to the transmission tower, and the lower part of the damping chamber (6) is connected to the connecting fitting (8) through the slide bar (7).

4. The wind deflection suppression device for an insulator string of a transmission tower according to claim 3, wherein The second connecting rod (9) is in a straight line with the position of the secondary insulator string (4).

5. The wind deflection suppression device for the insulator string of a transmission tower according to claim 1, characterized in that The damping liquid (11) uses a non-Newtonian fluid with shear thickening properties.

6. The wind deflection suppression device for the insulator string of a transmission tower according to claim 1, characterized in that, The ball screw pair includes a ball screw (14), a ball nut (15), and balls (17). The groove between the ball screw (14) and the ball nut (15) holds the balls (17). When moving, the linear motion of the ball nut (15) will drive the balls (17) to move along the ball screw (14).

7. The wind deflection suppression device for a transmission tower insulator string according to claim 6, characterized in that, A limit block (16) is also arranged in the damping chamber (6), and the limit block (16) is used to limit the movement range of the ball nut in the ball screw pair.

8. The wind deflection suppression device for the insulator string of a transmission tower according to claim 1, characterized in that The materials of the wind deflection suppression structures are all made of insulating materials.

9. The wind deflection suppression device for the insulator string of a transmission tower according to claim 1, wherein When the main insulator string (2) does not deflect due to wind, the air spring (10) is in a stretched state.

10. A wind deflection suppression system for an insulator string of a transmission tower, characterized in that, It includes a wind deflection suppression device for a transmission tower insulator string according to any one of claims 1 - 9.

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