A wind deflection control device and control method for overhead split conductor

Abstract

The invention belongs to the technical field of safe service of power transmission lines, and relates to an overhead split conductor wind deflection control device and a control method thereof. An opening is provided in the middle part of a rectangular frame, a universal joint is provided at the bottom of the rectangular frame, a rectangular box is fixedly connected to the bottom of the universal joint, and an anti-deflection component for preventing the conductor from deflecting is provided inside the rectangular box; a support arm is slidably penetrated inside the four corner notches of the rectangular frame, and a clamping component for clamping the conductor is provided at one end of the support arm; a replacement component for replacing a rubber pad is provided inside the support arm; a plurality of pressing blocks on both sides of the rectangular frame are respectively located at the four corners of the rectangular frame, and the same group of fixing components for fixing the support arm is provided between two pressing blocks located at the same position; the problem that the existing wind deflection flashover prevention device is large in size, has a poor wind deflection prevention effect, and reduces the safety of the iron tower is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of safe service of power transmission lines, and relates to a wind deviation control device for an overhead split conductor and a control method thereof. Background Art

[0002] With the rapid development of my country's economy, the demand for energy is increasing, especially for electric energy. As my country's power grid construction enters the fast lane, the mileage of transmission lines is getting longer and longer, and the safe operation of transmission lines is highlighted. Events that cause power grid operation accidents occur from time to time. Among them, the wind deviation of conductors caused by strong winds, which in turn causes line tripping, conductor arc burns, strand breakage, line breakage and other safety accidents, have attracted more and more attention from the majority of power grid operation and maintenance personnel and transmission engineering scholars.

[0003] In order to suppress the occurrence of wind deflection accidents of conductors, various measures have been taken. So far, the wind deflection protection devices reported mainly include: inclined barrier-type wind deflection protection insulating cables, pull-down wind deflection protection insulating cables, support-type wind deflection protection devices, adjustable transmission line wind deflection protection devices, single-circuit transmission line tower mid-phase conductor wind deflection protection devices, tension tower wind deflection protection jumper crossarms, suspension insulator string adaptive wind deflection protection devices, high-voltage transmission line overhead wind deflection protection flashover devices, etc. Most of these devices are based on their own strength and rigidity, and take "hard resistance" measures to block large-scale movement of the conductors to achieve wind deflection protection effects. This setting ignores the structural dynamic response of the transmission line caused by dynamic wind, resulting in large size of the wind deflection protection device, waste of materials, and unsatisfactory effects. In addition, these devices increase the load of the crossarm under wind load and reduce the safety of the tower.

[0004] Based on this, and in view of the strong demand for transmission lines to prevent wind deflection flashover, the importance and urgency of developing a transmission line wind deflection prevention device that is placed on the conductor and effectively consumes the energy brought to the structure by the dynamic wind through hysteresis energy dissipation, thereby reducing the effect of wind load on the conductor, and that has a small device scale, no incidental impact on the tower itself, and good wind deflection prevention effect are highlighted. Summary of the invention

[0005] In view of this, in order to solve the problem that the above-mentioned existing anti-wind deflection flashover device is based on its own strength and rigidity, takes "hard resistance" measures to block the large-scale movement of the conductor, ignores the structural dynamic response of the transmission line caused by dynamic wind, makes the anti-wind deflection device large in size and poor in anti-wind deflection effect, and reduces the safety of the iron tower, the present invention provides an overhead split conductor wind deflection control device and a control method thereof.

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

[0007] An overhead split conductor windage control device, comprising:

[0008] A plurality of rectangular frames, wherein the middle part of the rectangular frames is provided with an opening, the bottom of the rectangular frames is provided with a universal joint, the bottom of the universal joint is fixedly connected with a rectangular box, and the interior of the rectangular box is provided with an anti-deflection component for preventing the wire from deflecting;

[0009] The four corners of the rectangular frame are all provided with notches, and a support arm is slidably penetrated inside the notch, and a clamping assembly for clamping the wire is provided at one end of the support arm;

[0010] A replacement assembly for replacing the rubber pad is provided inside the support arm;

[0011] A plurality of pressing blocks are arranged on both sides of the rectangular frame. The plurality of pressing blocks are respectively located at the four corners of the rectangular frame. The same group of fixing components for fixing the support arm is arranged between two pressing blocks located at the same position.

[0012] Furthermore, the anti-deflection component includes arc holes opened on both sides of the rectangular box, a circular plate is rotated inside the arc hole, the outer wall of the circular plate is fixedly connected with two symmetrically arranged connecting rods, one end of the connecting rod is fixedly connected with a fan, the top inner wall of the rectangular box is fixedly connected with a micro motor, the output shaft of the micro motor is fixedly connected to the top of the circular plate, and a wind speed sensor and a controller are arranged on the top of the rectangular box.

[0013] Furthermore, the clamping assembly includes two arc-shaped grooves opened at one end of the support arm, and the same arc-shaped block is rotatably connected between the inner walls on both sides of the arc-shaped groove, and both ends of the rotation point of the arc-shaped block are provided with card grooves, and the inner wall of the arc-shaped block is provided with a T-shaped groove, and a mounting block is embedded in the T-shaped groove. A rubber pad is provided on one side of the mounting block, and a magnet is fixedly connected to one end of the mounting block, and the two magnets are used together.

[0014] Furthermore, the replacement component includes two strip grooves respectively opened on both sides of the support arm, and two symmetrically arranged clamping rods are slidably penetrated inside the strip groove. One end of the clamping rod passes through an inner wall of one side of the strip groove and engages with the clamping groove. One end of the two clamping rods is fixedly connected to the same connecting plate, and two symmetrically arranged tension springs are fixedly connected between one side of the connecting plate and an inner wall of one side of the strip groove.

[0015] Furthermore, the fixing assembly includes two first circular holes opened inside the rectangular frame, two pressing blocks are located on both sides of the first circular holes, and the sides of the two pressing blocks close to each other are respectively fixedly connected with two symmetrically arranged sleeves and two inner rods, the inner rods are slidably connected to the inside of the corresponding sleeves, and the same No. 1 spring is fixedly connected between one end of the inner rod and the inner wall of one side of the sleeve.

[0016] Furthermore, a toggle block is fixedly connected to one side of the top of the pressing block, a push rod is fixedly connected to one side of the pressing block, a plurality of second circular holes are opened on both sides of the support arm, and one end of the two push rods are inserted into the inside of the second circular holes.

[0017] Furthermore, a second rectangular groove is opened inside the support arm, and a third rectangular groove is opened on both sides of the support arm. The third rectangular groove is connected with the second rectangular groove. A convex plate slides through the inside of the third rectangular groove. The same strip horizontal plate is fixedly connected between the two convex plates. A rectangular hole is opened in the middle position of the strip horizontal plate, and the convex plate is used in conjunction with the connecting plate.

[0018] Furthermore, a first rectangular groove is opened inside the support arm, the first rectangular groove is located between the multiple second circular holes and connected with the second circular holes, the top of the first rectangular groove is connected with the bottom of the second rectangular groove, and two symmetrically arranged strip vertical plates are slidably connected inside the first rectangular groove, one end of the two strip vertical plates passes through the rectangular holes and is fixedly connected with a protrusion, a plurality of No. 2 springs are fixedly connected between the two strip vertical plates, and the strip vertical plates are used in conjunction with the push rod.

[0019] Furthermore, a same rotating shaft is rotatably connected between the top inner wall and the bottom inner wall of the opening, and a plurality of blades are fixedly connected to the outer wall of the rotating shaft.

[0020] A control method for an overhead split conductor windage control device specifically comprises the following steps:

[0021] S1. Calculation formula for fan thrust.

[0022] The thrust of a fan depends on multiple factors, including the number of fan blades, rotational speed, and air flow velocity. The thrust of a fan is calculated as shown in formula (1).

[0023] F w =ρ·A·v 2 ·η (1)

[0024] Among them: F w is the thrust generated by the fan (N), ρ is the air density (Kg / m 3 ), A is the fan blade area (m 2 ), v is the fan air velocity (m / s), η is the fan efficiency, which can be expressed as:

[0025]

[0026] Where: P in , P out Respectively represent the input and output power of the fan (W).

[0027] The calculation formula for the fan air velocity v is:

[0028]

[0029] Where: Q represents the air volume (m 3 / h), expressed by the following formula:

[0030]

[0031] Where: r is the fan radius, n is the fan speed (rpm)

[0032] Substituting formulas (2), (3) and (4) into formula (1), we can obtain:

[0033]

[0034] S2, the split conductor windage control spacer rod controls the windage of the conductor.

[0035] The dynamic equation of the split conductor under wind load is expressed as:

[0036]

[0037] Where: [M], [C], [K] are the mass matrix, damping matrix, and stiffness matrix of the conductor respectively. {x} are the acceleration vector, velocity vector, and displacement vector of the conductor, respectively. {P(t)} is the wind load acting on the conductor at any time t, where:

[0038]

[0039] In formula (7): m i is the mass of the i-th spacer plus half the mass of the conductors on both sides (the conductors between the two spacers); in formula (8): k i is the lateral stiffness of the conductor between the i-th spacer and the i+1-th spacer.

[0040] Solving equation (6), we can obtain the dynamic response of the split conductor under wind load, including the displacement at any position of the conductor at any time t.

[0041] The dynamic equation of the split conductor under wind load after adding the wind deviation control device is:

[0042]

[0043] Where: Other symbols are the same as in formula (6), except that: F w (t) is the force generated by the windage control device, that is, the wind turbine thrust calculated by formula (5), is a column vector, showing the application position of the windage control device. The stiffness matrix is ​​the same as formula (6), and the mass matrix becomes:

[0044]

[0045] Where: m cThe quality of the windage control device.

[0046] Solving equation (9), we can obtain the dynamic response of the split conductor under wind load after adding the windage control device, including the displacement of the conductor at any position at any time t. By comparing the displacement of the conductor at any time t obtained by equation (9) and equation (6), we can determine the windage control effect of the conductor after adding the windage control device. By adjusting the wind turbine thrust F calculated by equation (5), we can get the windage control effect of the split conductor under wind load after adding the windage control device. w (t) to adjust the windage control effect of the conductor.

[0047] The overhead split conductor windage control device disclosed in the present invention has the following beneficial effects:

[0048] 1. Enhanced anti-dancing performance: By designing a gyroscopic structure (blades and shafts) within the rectangular frame, the gyroscopic effect is used to significantly reduce the shaking or swinging amplitude of the rectangular frame under strong winds, thereby improving the anti-dancing effect of the spacer rods, ensuring the stability and safety of the power lines, and solving the problem that the existing wind deflection flashover protection device is large in size, has a poor wind deflection protection effect, and will reduce the safety of the tower.

[0049] 2. Intelligent adjustment of fan direction: The controller controls the micro motor to drive the circular plate and the connecting rod to rotate, thereby adjusting the direction of the fan, effectively resisting the rotational force brought by strong winds, and enhancing the self-stabilization ability of the equipment under severe weather conditions.

[0050] 3. Convenient maintenance: A mechanism for quickly replacing the rubber pad is designed. The arc block can be unlocked and moved by pressing the push block, making it convenient to pull out the rubber pad from the T-slot for replacement, reducing maintenance difficulty and working hours and improving maintenance efficiency.

[0051] 4. Adjustable extension length: By operating the toggle block and the press block, the extension length of the support arm can be easily adjusted to adapt to different installation environments and requirements, enhancing the flexibility and applicability of the equipment.

[0052] 5. Compact structure, safe and reliable: The overall design structure is compact, the components are closely matched, and elastic elements such as springs and tension springs are used to ensure smooth, safe and reliable operation.

[0053] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0055] Figure 1 It is a schematic diagram of an overhead split conductor model in the prior art (a number of spacer bars are installed on the transmission line);

[0056] Figure 2 This is an overhead split conductor model after adding a windage control device to the present invention (the windage control device is installed below the spacer);

[0057] Figure 3 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the stroke control device;

[0058] Figure 4 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the rectangular box and the universal joint;

[0059] Figure 5 For the present invention Figure 3 Schematic diagram of the three-dimensional cross-sectional structure of the middle rectangular box;

[0060] Figure 6 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the middle rectangular frame and the support arm;

[0061] Figure 7 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the middle rectangular frame and the pressing block;

[0062] Figure 8 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the middle support arm and the arc block;

[0063] Fig. 9 For the present invention Figure 3 Schematic diagram of the exploded structure of the middle support arm and the arc block;

[0064] Fig.10 For the present invention Figure 3 Schematic diagram of the exploded structure of the middle arc block and the mounting block;

[0065] Fig.11 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the convex plate and the support arm;

[0066] Fig.12 For the present invention Figure 3 A schematic diagram of the three-dimensional cross-sectional structure of the middle support arm;

[0067] Fig.13 For the present invention Figure 3 Schematic diagram of the exploded structure of the middle support arm and strip vertical plate;

[0068] Fig.14 For the present invention Figure 3 Schematic diagram of the exploded structure of the middle strip vertical plate and the strip horizontal plate.

[0069] In the figure: 1, rectangular frame; 2, pressing block; 3, supporting arm; 4, arc block; 5, rotating shaft; 6, blade; 7, universal joint; 8, connecting rod; 9, rectangular box; 10, fan; 11, round plate; 12, wind speed sensor; 13, controller; 14, arc hole; 15, micro motor; 16, notch; 17, first round hole; 18, sleeve; 19, toggle block; 20, push rod; 21, No. 1 spring; 22, inner Rod; 23, rubber pad; 24, convex plate; 25, second circular hole; 26, arc groove; 27, clamping groove; 28, connecting plate; 29, T-slot; 30, mounting block; 31, magnet; 32, clamping rod; 33, strip groove; 34, tension spring; 35, strip vertical plate; 36, strip horizontal plate; 37, first rectangular groove; 38, second rectangular groove; 39, third rectangular groove; 40, No. 2 spring; 41, convex block; 42, rectangular hole. DETAILED DESCRIPTION

[0070] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0071] Reference Figure 3-14 A wind deflection control device for an overhead split conductor, wherein an opening is provided in the middle part of a plurality of rectangular frames 1, a universal joint 7 is provided at the bottom of the rectangular frame 1, a rectangular box 9 is fixedly connected to the bottom of the universal joint 7, an anti-deflection component for preventing the conductor from deflecting is provided inside the rectangular box 9, the anti-deflection component comprises an arc hole 14 opened on both sides of the rectangular box 9, a circular plate 11 is rotatably penetrated inside the arc hole 14, two symmetrically arranged connecting rods 8 are fixedly connected to the outer wall of the circular plate 11, one end of the connecting rod 8 is fixedly connected to a fan 10, a micro motor 15 is fixedly connected to the top inner wall of the rectangular box 9, and the micro motor The output shaft of 15 is fixedly connected to the top of the circular plate 11. A wind speed sensor 12 and a controller 13 are provided on the top of the rectangular box 9. Strong wind will blow the rectangular frame 1 to swing. The rectangular box 9 is connected through the universal joint 7 and then to the fan 10. Finally, the controller 13 controls the opening of the fans 10 on both sides, and the controller 13 controls the start of the micro motor 15. At this time, the output shaft of the micro motor 15 can drive the circular plate 11 to rotate. At this time, the circular plate 11 can drive the connecting rod 8 to rotate, and the connecting rod 8 drives the fan 10 to rotate, and then the direction of the fan 10 is adjusted to resist the rotational force brought by the strong wind of the spacer rod.

[0072] The four corners of the rectangular frame 1 are provided with notches 16, and a support arm 3 is slidably penetrated inside the notch 16. A clamping assembly for clamping the wire is provided at one end of the support arm 3. The clamping assembly includes two arc grooves 26 provided at one end of the support arm 3. The same arc block 4 is rotatably connected between the inner walls on both sides of the arc groove 26. Both ends of the rotation point of the arc block 4 are provided with card slots 27. The inner wall of the arc block 4 is provided with a T-slot 29. A mounting block 30 is embedded inside the T-slot 29. A rubber pad 23 is provided on one side of the mounting block 30. A magnet 31 is fixedly connected to one end of the mounting block 30. The two magnets 31 are used in combination.

[0073] A replacement component for replacing the rubber pad 23 is provided inside the support arm 3, and the replacement component includes two strip grooves 33 respectively opened on both sides of the support arm 3, and two symmetrically arranged clamping rods 32 are slidably penetrated inside the strip groove 33, one end of the clamping rod 32 penetrates the inner wall of one side of the strip groove 33 and engages with the clamping groove 27, one end of the two clamping rods 32 is fixedly connected to the same connecting plate 28, and two symmetrically arranged tension springs 34 are fixedly connected between one side of the connecting plate 28 and the inner wall of one side of the strip groove 33, a second rectangular groove 38 is opened inside the support arm 3, and third rectangular grooves 39 are opened on both sides of the support arm 3, the third rectangular groove 39 is connected to the second rectangular groove 38, and the interior of the third rectangular groove 39 slides through There is a convex plate 24, and the same strip horizontal plate 36 is fixedly connected between the two convex plates 24. A rectangular hole 42 is opened in the middle position of the strip horizontal plate 36. The convex plate 24 is used in conjunction with the connecting plate 28. A first rectangular groove 37 is opened inside the support arm 3. The first rectangular groove 37 is located between the plurality of second circular holes 25 and is connected to the second circular holes 25. The top of the first rectangular groove 37 is connected to the bottom of the second rectangular groove 38. Two symmetrically arranged strip vertical plates 35 are slidably connected inside the first rectangular groove 37. One end of the two strip vertical plates 35 passes through the rectangular hole 42 and is fixedly connected with a convex block 41. A plurality of No. 2 springs 40 are fixedly connected between the two strip vertical plates 35. The strip vertical plate 35 is used in conjunction with the push rod 20.

[0074] When the rubber pad 23 needs to be replaced, the two pressing blocks 2 can be pressed, and the pressing blocks 2 drive the two pushing rods 20 to move closer to each other. At this time, the inner rod 22 is inserted into the sleeve 18 and squeezes the No. 1 spring 21. At this time, the pushing rod 20 is inserted into the second circular hole 25. The pushing rod 20 pushes the two strip vertical plates 35 to move closer to each other. The two strip vertical plates 35 can squeeze the No. 2 spring 40 and drive the two protrusions 41 to move closer to each other. At this time, the protrusion 41 is located directly above the rectangular hole 42, and the braking state of the strip horizontal plate 36 can be released, and the strip horizontal plate 36 can be moved. The strip cross plate 36 drives the two convex plates 24 to move. At this time, the inclined surface of the convex plate 24 is inserted into one side of the connecting plate 28. The connecting plate 28 drives the clamping rod 32 to move horizontally. The clamping rod 32 moves out from the inside of the clamping groove 27, and the tension spring 34 is stretched. At this time, the braking state of the arc block 4 can be released, and then the two arc blocks 4 can be separated and rotated to both sides, revealing the mounting block 30, and the rubber pad 23 and the mounting block 30 can be pulled out from the inside of the T-slot 29. After replacement, the arc block 4 is closed again to complete the clamping effect of the cable, reducing the difficulty of operation for workers.

[0075] The top inner wall and the bottom inner wall of the opening are rotatably connected with a same rotating shaft 5, and the outer wall of the rotating shaft 5 is fixedly connected with a plurality of blades 6. At the same time, the plurality of blades 6 and the rotating shaft 5 inside the rectangular frame 1 constitute a gyroscope. When the blades 6 are blown by wind, the blades 6 rotate around the rotating shaft 5. The greater the wind force, the higher the rotation speed of the blades 6. The high-speed rotating blades 6 form a gyroscope effect, that is, the centrifugal force generated by the high-speed rotation has a tendency to keep itself balanced, thereby reducing the shaking or swinging amplitude of the rectangular frame 1 under strong winds and enhancing the anti-dancing effect of the support arm 3.

[0076] A plurality of pressing blocks 2 are arranged on both sides of the rectangular frame 1, and the plurality of pressing blocks 2 are respectively located at the four corners of the rectangular frame 1. The same group of fixing components for fixing the support arm 3 is arranged between the two pressing blocks 2 located at the same position. The fixing components include two first circular holes 17 opened inside the rectangular frame 1, and the two pressing blocks 2 are located on both sides of the first circular holes 17. Two symmetrically arranged sleeves 18 and two inner rods 22 are fixedly connected to the sides of the two pressing blocks 2 close to each other. The inner rods 22 are slidably connected to the inside of the corresponding sleeves 18. The same No. 1 spring 21 is fixedly connected between one end of the inner rod 22 and the inner wall of one side of the sleeve 18. The top side of the pressing block 2 is fixed A toggle block 19 is connected, and a push rod 20 is fixedly connected to one side of the pressing block 2. A plurality of second circular holes 25 are provided on both sides of the support arm 3. One end of the two push rods 20 are inserted into the second circular holes 25. When it is necessary to adjust the extension length of the support arm 3, the two pressing blocks 2 can be moved by the toggle block 19. At this time, the two pressing blocks 2 are moved away from each other, and the two pressing blocks 2 drive the two push rods 20 to move out from the second circular holes 25. The support arm 3 can be pulled out from the notch 16. After the extension length of the support arm 3 can be adjusted, the pressing block 2 can be pushed again, the support arm 3 can be fixed again, and the extension length of the support arm 3 can be adjusted.

[0077] When the overhead split conductor wind deflection control device is working, strong wind will blow the rectangular frame 1 to swing, and the rectangular box 9 is connected to the fan 10 through the universal joint 7. Finally, the controller 13 controls the opening of the fans 10 on both sides, and the controller 13 controls the micro motor 15 to start. At this time, the output shaft of the micro motor 15 can drive the circular plate 11 to rotate, and the circular plate 11 can drive the connecting rod 8 to rotate, and the connecting rod 8 drives the fan 10 to rotate, and then the direction of the fan 10 is adjusted to resist the rotational force brought by the strong wind on the spacer rod.

[0078] At the same time, the multiple blades 6 and the rotating shaft 5 inside the rectangular frame 1 constitute a gyroscope. When the blades 6 are blown by wind, the blades 6 rotate around the rotating shaft 5. The stronger the wind, the higher the rotation speed of the blades 6. The high-speed rotating blades 6 form a gyroscope effect, that is, the centrifugal force generated by their high-speed rotation has a tendency to keep itself balanced, thereby reducing the shaking or swinging amplitude of the rectangular frame 1 under strong winds and enhancing the anti-dancing effect of the spacer rods.

[0079] When the rubber pad 23 needs to be replaced, the two pressing blocks 2 can be pressed, and the pressing blocks 2 drive the two pushing rods 20 to approach each other. At this time, the inner rod 22 is inserted into the interior of the sleeve 18 and squeezes the No. 1 spring 21. At this time, the pushing rod 20 is inserted into the interior of the second circular hole 25. The pushing rod 20 pushes the two strip vertical plates 35 to approach each other. The two strip vertical plates 35 can squeeze the No. 2 spring 40 and drive the two protrusions 41 to approach each other. At this time, the protrusion 41 is located directly above the rectangular hole 42, and the braking state of the strip horizontal plate 36 can be released. The strip horizontal plate 36 is moved, and the strip horizontal plate 36 drives the two protrusions 24 to move.

[0080] At this time, the inclined surface of the convex plate 24 is inserted into one side of the connecting plate 28, and the connecting plate 28 drives the clamping rod 32 to move horizontally, and the clamping rod 32 is moved out from the inside of the clamping groove 27, and the tension spring 34 is stretched. At this time, the braking state of the arc block 4 can be released, and then the two arc blocks 4 can be separated and rotated to both sides, exposing the mounting block 30, and the rubber pad 23 and the mounting block 30 can be pulled out from the inside of the T-slot 29. After replacement, the arc block 4 is closed again, and the clamping effect of the cable is completed, reducing the difficulty of operation for workers;

[0081] When it is necessary to adjust the extended length of the support arm 3, the two pressing blocks 2 can be moved by the toggle block 19. At this time, the two pressing blocks 2 move away from each other, and the two pressing blocks 2 drive the two push rods 20 to move out from the inside of the second circular hole 25. The support arm 3 can be pulled out from the inside of the notch 16, and then the extended length of the support arm 3 can be adjusted. Then, the pressing block 2 can be pushed again, and the support arm 3 can be fixed again to complete the adjustment of the extended length of the support arm 3.

[0082] When the overhead split conductor windage control device is used, the following effects can be achieved:

[0083] 1. Spacer rod anti-dancing control: When a strong wind signal is detected, the controller 13 automatically starts, controls the micro motor 15 to rotate, and drives the fan 10 to adjust to the best direction to resist the wind through the circular plate 11 and the connecting rod 8. At the same time, the gyroscope structure automatically responds to the change of wind force, accelerates the rotation to produce a gyro effect, and reduces the shaking of the rectangular frame 1.

[0084] 2. Control of replacing the rubber pad 23: Press the two pressing blocks 2, insert the push rod 20 into the second circular hole 25 and push the strip vertical plate 35 to release the brake on the strip horizontal plate 36. Move the strip horizontal plate 36, push the connecting plate 28 through the convex plate 24 to drive the clamping rod 32 to move out of the clamping groove 27, and unlock the arc block 4. Separate the arc block 4, pull out the rubber pad 23 and the mounting block 30 from the T-slot 29, replace the new rubber pad 23, and then perform the reverse operation to re-fix the arc block 4.

[0085] 3. Adjustment of the extension length of the support arm 3: Move the two pressing blocks 2 by the toggle block 19 to move the push rod 20 out of the second circular hole 25 to release the fixation of the support arm 3. Pull out the support arm 3 from the notch 16, adjust it to the required length, and operate the pressing block 2 again to fix the support arm 3 again.

[0086] A control method for an overhead split conductor windage control device specifically comprises the following steps:

[0087] S1. Calculation formula for fan thrust.

[0088] The thrust of a fan depends on many factors, including the number of fan blades, rotation speed, air flow velocity, etc. The thrust calculation of a fan is shown in formula (1).

[0089] F w =ρ·A·v 2 ·η (1)

[0090] Among them: F w is the thrust generated by the fan (N), ρ is the air density (Kg / m 3 ), A is the fan blade area (m 2 ), v is the fan air velocity (m / s), η is the fan efficiency, which can be expressed as:

[0091]

[0092] Where: P in , P out Respectively represent the input and output power of the fan (W).

[0093] The calculation formula for the fan air velocity v is:

[0094]

[0095] Where: Q represents the air volume (m 3 / h), expressed by the following formula:

[0096]

[0097] Where: r is the fan radius, n is the fan speed (rpm)

[0098] Substituting formulas (2), (3) and (4) into formula (1), we get:

[0099]

[0100] S2, the split conductor windage control spacer rod controls the windage of the conductor.

[0101] according to Figure 1Split conductor model, the dynamic equation of the split conductor under wind load is expressed as:

[0102]

[0103] Where: [M], [C], [K] are the mass matrix, damping matrix, and stiffness matrix of the conductor respectively. {x} are the acceleration vector, velocity vector, and displacement vector of the conductor, respectively. {P(t)} is the wind load acting on the conductor at any time t, where:

[0104]

[0105] In formula (7): m i is the mass of the i-th spacer bar plus half the mass of the conductors on both sides (the conductors between the two spacers); in formula (8): k i is the lateral stiffness of the conductor between the i-th spacer and the i+1-th spacer.

[0106] Solving equation (6), we can obtain the dynamic response of the split conductor under wind load, including the displacement at any position of the conductor at any time t.

[0107] The split conductor model after adding the windage control device is as follows Figure 2 As shown:

[0108] The dynamic equation of the split conductor under wind load after adding the wind deviation control device is:

[0109]

[0110] Where: Other symbols are the same as in formula (6), except that: F w (t) is the force generated by the windage control device, that is, the wind turbine thrust calculated by formula (5), is a column vector showing the position of the windage control device. The stiffness matrix is ​​the same as formula (6), and the mass matrix becomes:

[0111]

[0112] Where: m c The quality of the windage control device.

[0113] Solving equation (9), we can obtain the dynamic response of the split conductor under wind load after adding the windage control device, including the displacement of the conductor at any position at any time t. By comparing the displacement of the conductor at any time t obtained by equation (9) and equation (6), we can determine the windage control effect of the conductor after adding the windage control device. By adjusting the wind turbine thrust F calculated by equation (5), we can get the windage control effect of the split conductor under wind load after adding the windage control device. w(t) (After the fan is finalized, the main thing is to adjust the fan speed) and the wind deflection control effect of the conductor can be adjusted.

[0114] When the wind deflection device is used: first, the wind deflection control device spacer is installed at the position closest to the insulator string, and the sensor for measuring wind speed and wind direction starts working to monitor the ambient wind speed and wind direction. When the ambient wind speed exceeds a certain limit, the control system uses formula (6) to solve the conductor displacement at the installation position of the wind deflection control spacer without starting the wind deflection control spacer under the action of the wind speed, and uses formula (9) to solve the conductor displacement at the installation position of the wind deflection control spacer after starting the wind deflection control spacer under the action of the wind speed. Based on the preset value of the conductor wind deflection control effect, that is, the ratio of the conductor displacement at any time t calculated by formula (9) and formula (6), it is determined that the wind turbine thrust F is reached. w The control system starts the fan motor, adjusts the fan angle (to face the incoming wind direction), and rotates it at a speed n to control the wind deflection of the conductor.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An overhead split conductor windage control device, characterized in that: include: A plurality of rectangular frames (1), wherein an opening is provided in the middle portion of the rectangular frame (1), a universal joint (7) is provided at the bottom of the rectangular frame (1), a rectangular box (9) is fixedly connected to the bottom of the universal joint (7), and an anti-deflection component for preventing the wire from deflecting is provided inside the rectangular box (9); The four corners of the rectangular frame (1) are each provided with a notch (16), a support arm (3) is slidably penetrated inside the notch (16), and a clamping assembly for clamping a wire is provided at one end of the support arm (3); A replacement component for replacing the rubber pad is provided inside the support arm (3); the replacement component comprises two strip grooves (33) respectively provided on both sides of the support arm (3); two symmetrically arranged clamping rods (32) are slidably penetrated inside the strip groove (33); one end of the clamping rod (32) penetrates an inner wall of one side of the strip groove (33) and is clamped with the clamping groove (27); one end of the two clamping rods (32) is fixedly connected to the same connecting plate (28); two symmetrically arranged tension springs (34) are fixedly connected between one side of the connecting plate (28) and an inner wall of one side of the strip groove (33); A plurality of pressing blocks (2) are arranged on both sides of the rectangular frame (1); the plurality of pressing blocks (2) are respectively located at the four corners of the rectangular frame (1); a same set of fixing components for fixing the support arm (3) is arranged between two pressing blocks (2) located at the same position; the fixing components include two first circular holes (17) opened inside the rectangular frame (1); the two pressing blocks (2) are located on both sides of the first circular holes (17); and two symmetrically arranged sleeves (18) are respectively fixedly connected to the sides of the two pressing blocks (2) close to each other. and two inner rods (22), the inner rods (22) being slidably connected to the inside of the corresponding sleeve (18), and a same No. 1 spring (21) being fixedly connected between one end of the inner rod (22) and the inner wall of one side of the sleeve (18); a toggle block (19) being fixedly connected to one side of the top of the pressing block (2), and a push rod (20) being fixedly connected to one side of the pressing block (2), and a plurality of second circular holes (25) being opened on both sides of the support arm (3), and one end of each of the two push rods (20) being inserted into the inside of the second circular holes (25); A second rectangular groove (38) is provided inside the support arm (3), and third rectangular grooves (39) are provided on both sides of the support arm (3). The third rectangular groove (39) is connected to the second rectangular groove (38), and a convex plate (24) is slidably penetrated inside the third rectangular groove (39). The same strip-shaped horizontal plate (36) is fixedly connected between the two convex plates (24). A rectangular hole (42) is provided in the middle of the strip-shaped horizontal plate (36). The convex plate (24) is used in conjunction with the connecting plate (28); a first rectangular groove (37) is provided inside the support arm (3). ), the first rectangular groove (37) is located between the plurality of second circular holes (25) and is connected to the second circular holes (25), the top of the first rectangular groove (37) is connected to the bottom of the second rectangular groove (38), the interior of the first rectangular groove (37) is slidably connected with two symmetrically arranged strip vertical plates (35), one end of the two strip vertical plates (35) passes through the rectangular hole (42) and is fixedly connected with a protrusion (41), a plurality of No. 2 springs (40) are fixedly connected between the two strip vertical plates (35), and the strip vertical plates (35) are used in conjunction with the push rod (20).

2. The overhead split conductor windage control device according to claim 1, characterized in that: The anti-deflection component comprises arc-shaped holes (14) provided on both sides of a rectangular box (9); a circular plate (11) is rotatably penetrated inside the arc-shaped hole (14); the outer wall of the circular plate (11) is fixedly connected to two symmetrically arranged connecting rods (8); one end of the connecting rod (8) is fixedly connected to a fan (10); the top inner wall of the rectangular box (9) is fixedly connected to a micro motor (15); the output shaft of the micro motor (15) is fixedly connected to the top of the circular plate (11); and a wind speed sensor (12) and a controller (13) are arranged on the top of the rectangular box (9).

3. The overhead split conductor windage control device according to claim 2, characterized in that: The clamping assembly comprises two arc-shaped grooves (26) provided at one end of the support arm (3); a same arc-shaped block (4) is rotatably connected between the inner walls on both sides of the arc-shaped groove (26); both ends of the rotation point of the arc-shaped block (4) are provided with clamping grooves (27); the inner wall of the arc-shaped block (4) is provided with a T-shaped groove (29); a mounting block (30) is embedded in the T-shaped groove (29); a rubber pad (23) is provided on one side of the mounting block (30); a magnet (31) is fixedly connected to one end of the mounting block (30); and the two magnets (31) are used in combination.

4. The overhead split conductor windage control device according to claim 1, characterized in that: A common rotating shaft (5) is rotatably connected between the top inner wall and the bottom inner wall of the opening, and a plurality of blades (6) are fixedly connected to the outer wall of the rotating shaft (5).

5. A control method for an overhead split conductor windage control device according to any one of claims 1 to 4, characterized in that: The specific steps include: S1, calculation formula of fan thrust; The thrust of a fan depends on many factors, including the number of fan blades, rotation speed, and air flow velocity. The thrust of a fan is calculated as shown in formula (1): F w =ρ·A·v 2 ·h (1) Among them: F w is the thrust generated by the fan (N), ρ is the air density (Kg / m 3 ), A is the fan blade area (m 2 ), v is the fan air velocity (m / s), η is the fan efficiency, then it can be expressed as: Where: P in , P out Respectively represent the input and output power of the fan (W); The calculation formula for the fan air velocity v is: Where: Q represents the air volume (m 3 / h), expressed by the following formula: Where: r is the fan radius, n is the fan speed (rpm) Substituting formulas (2), (3) and (4) into formula (1), we get: S2, split conductor windage control spacer rods to control the windage of the conductor; The dynamic equation of the split conductor under wind load is expressed as: Where: [M], [C], [K] are the mass matrix, damping matrix, and stiffness matrix of the conductor respectively. {x} are the acceleration vector, velocity vector, and displacement vector of the conductor, respectively. {P(t)} is the wind load acting on the conductor at any time t, where: In formula (7): m i is the mass of the i-th spacer bar plus half the mass of the conductors on both sides (the conductors between the two spacers); in formula (8): k i is the lateral stiffness of the conductor between the i-th spacer and the i+1-th spacer; Solving equation (6), we can obtain the dynamic response of the split conductor under wind load, including the displacement at any position of the conductor at any time t; The dynamic equation of the split conductor under wind load after adding the wind deviation control device is: Where: Other symbols are the same as in formula (6), except that: F w (t) is the force generated by the windage control device, that is, the wind turbine thrust calculated by formula (5), is a column vector showing the position of the windage control device. The stiffness matrix is ​​the same as formula (6), and the mass matrix becomes: Where: m c The quality of the windage control device; Solving equation (9), we can obtain the dynamic response of the split conductor under wind load after adding the windage control device, including the displacement of the conductor at any position at any time t. By comparing the displacement of the conductor at any time t obtained by equation (9) and equation (6), we can determine the windage control effect of the conductor after adding the windage control device. By adjusting the wind turbine thrust F calculated by equation (5), w (t) to adjust the windage control effect of the conductor.

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