An inertial capacitance type high voltage transmission line wind deflection suppression energy dissipation device

Abstract

The present invention discloses an inertial capacitance type high-voltage transmission line windage suppression energy dissipation device, comprising a connector, a pull rod, a base, and a control box. The connectors are two cylindrical cylinders, respectively provided at the left and right ends of the device and connected to the insulator; the pull rod passes through the control box, with its ends connected to the left and right connectors, respectively; the control box is a rectangular parallelepiped box, placed on the transmission tower via the base, with two turntables fixed to the left and right walls of the box. The turntables are respectively connected to the positive and negative thread segments of the positive and negative thread screws and connected by circumferentially arranged damping ropes; the positive and negative thread screws are provided in the middle region of the pull rod and pass through the interior of the control box, with a buffer provided between the positive and negative thread screws and the connectors.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power construction, and in particular relates to an inertial capacitance type high-voltage transmission line wind deflection suppression energy dissipation device. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] As a vital vehicle for electric energy transmission, the safety and reliability of high-voltage transmission lines have received widespread attention amid the rapid development of the power industry. Under the influence of lateral wind loads, transmission conductors can deviate from the vertical line direction, reducing the gap between the conductors and the towers or surrounding objects. When the conductor voltage breaks through the air and discharges to the towers, wind-induced flashover occurs. Due to their tall towers, large spans, and longer, more flexible insulator strings, high-voltage transmission lines are highly susceptible to wind-induced flashover accidents in windy weather, causing widespread power outages and significant social and economic losses. Therefore, to ensure the safety and stability of the power grid, it is urgent to implement measures to effectively reduce the occurrence of wind-induced flashover accidents.

[0004] In recent years, to address the frequent occurrence of wind-induced flashover accidents in power grids, researchers have proposed a series of wind-induced flashover prevention measures, such as adding a weight to the lower end of the insulator string (CN 103915807 B), changing the shape of the insulator string (CN 214753169U; CN 112670929 B), and installing a limiter cable (CN 103532078). These measures can achieve the goal of preventing wind-induced flashover to a certain extent, but they also have many shortcomings. Replacing the insulator string or even changing the tower type is expensive and difficult to implement. Installing guy wires and hanging weights have limited application and may also adversely affect the transmission line itself. Furthermore, these measures are mostly targeted at single-phase conductors, have simple structures, and only have a single-stage working mechanism. They are not very efficient in suppressing wind-induced flashover, cannot be freely adjusted according to the actual conditions of the transmission line, and are not very adaptable. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an inertial capacitance type high-voltage transmission line wind deviation suppression energy consumption device, which can effectively avoid the occurrence of wind deviation flashover accidents in high-voltage transmission lines to ensure their safe and stable operation in windy weather.

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

[0007] An embodiment of the present invention provides an inertial capacitance type high-voltage transmission line wind deflection suppression energy consumption device, comprising a connecting piece, a pull rod, a base and a control box, wherein two turntables are arranged inside the control box, the two turntables are mounted on the positive and negative threaded screw rods, and are connected by circumferentially arranged damping ropes, and the two turntables are connected to the two opposite side walls of the box body through bearing supports, so that the turntables can only rotate and cannot move linearly; the two ends of the positive and negative threaded screw rods pass through the control box and are connected to the pull rod, and the pull rod is connected to the connecting piece; and a base is provided at the bottom of the control box, the base comprising a pad, a boat-shaped plate and a spring group, the boat-shaped plate is flat in the middle and concave on both sides, the flat part of the boat-shaped plate is fixed to the pad, and the upward concave part is connected to the pad through the spring group.

[0008] As a further technical solution, the forward and reverse threaded screw rods are respectively provided with thread segments in opposite directions on the left and right sides of the central axis of the box body.

[0009] As a further technical solution, the connecting piece is two semi-cylindrical structures, which are bonded together to form a cylinder, and the inner wall of the cylinder is coated with a flexible insulating material.

[0010] As a further technical solution, a buffer is provided on the pull rod.

[0011] As a further technical solution, the buffer member includes a spring and a sleeve, and the spring is arranged parallel to the center line of the sleeve with a gap between the two.

[0012] As a further technical solution, the turntable has a certain thickness, a hole in the center and a thread on the inner ring of the hole. The threads of the inner rings of the two turntables are in opposite directions and each meshes with the positive and negative thread sections of the positive and negative threaded screw rods for transmission connection.

[0013] As a further technical solution, the damping rope is made of high-elasticity TPU material and is arranged parallel to the positive and negative threaded screw rods. The ends of the rope are fixed to the outside of the turntable by anchors, and a gasket is provided between the anchors and the turntable.

[0014] As a further technical solution, two limit blocks are installed at both ends of the forward and reverse threaded screws located outside the box to limit excessive horizontal displacement of the pull rod, thereby limiting the maximum windage angle of the insulator string.

[0015] As a further technical solution, the boat-shaped plate is made of elastic material.

[0016] The working principle of the present invention is as follows:

[0017] The present invention can realize the coordinated anti-wind deviation control of the same-phase transmission lines based on the inertia capacity, and has a two-stage working principle. Specifically, under the action of horizontal wind load, the transmission line will produce a vertical line direction deviation. The wind deviation of the insulator string drives the pull rod to move horizontally. The buffer first plays a certain buffering role on the vibration caused by the smaller pulsating wind. The pull rod drives the two turntables on the positive and negative thread sections of the positive and negative threaded screws to rotate relative to each other, causing the parallel damping wires to twist and elastically deform, consuming energy to achieve the purpose of preventing wind deviation. At the same time, the elastic restoring force of the damping wire after being stretched exerts a torque on the turntable. The rotation of the turntable drives the positive and negative threaded screws to reset, and the device returns to its initial working state.

[0018] When the windage angle of the insulator string approaches the maximum allowable windage angle, the limit block presses against the outside of the box to limit the further movement of the pull rod. If it continues to move, it needs to drive the control box to move together, overcome the friction at the bottom of the box and compress the spring group to do work, thus enhancing the damping effect and not adding additional force to the tower and causing damage to the tower.

[0019] The beneficial effects of the above embodiments of the present invention are as follows:

[0020] (1) The present invention improves the anti-wind deflection effect based on the inertia system. The positive and negative thread settings of the threaded screw realize the mutual restraint of wind deflection of the same-phase transmission line. The wind deflection is innovatively suppressed through the coordinated work between the same-phase conductors of the transmission line, with significant effect.

[0021] (2) The present invention has a two-stage working mechanism. The first stage is achieved by rotating the turntable on the positive and negative threaded screws and deforming the damping rope. The second stage is achieved by moving the compression spring group in the control box. It can perform wind deflection control at different wind speeds and has a wide working frequency band. It can be freely adjusted according to the maximum allowable wind deflection angle of the line and has strong adaptability.

[0022] (3) The present invention is easy to install and does not damage the transmission tower itself. It does not add unbalanced force to the transmission tower during operation, and can automatically return to its original position after the operation is completed.

[0023] (4) The present invention has a light overall mass, a simple structure, and does not require external energy input. It can effectively prevent wind-induced flashover accidents in power transmission lines and has good economy and applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 is a schematic diagram of the overall installation of a wind deflection prevention device on a transmission line according to one or more embodiments of the present invention;

[0026] Figure 2 is a schematic diagram of the overall structure of a wind deflection prevention device according to one or more embodiments of the present invention;

[0027] Figure 3 This invention Figure 2 Schematic diagram of the interior of the box;

[0028] Figure 4 This invention Figure 2 A schematic diagram of the structure at center A;

[0029] Figure 5 This invention Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0030] Figure 6 This invention Figure 2 Enlarged schematic diagram of the structure at point C in the middle.

[0031] In the figure: the distances or sizes between parts are exaggerated to show the positions of the parts, and the diagram is for illustration only;

[0032] Among them, 1 connecting part, 2 pull rod, 3 buffer part, 4 base, 5 control box, 6 turntable, 7 forward and reverse threaded screw, 8 damping rope, 9 anchor, 10 bearing support, 11 limit block, 12 spring, 13 sleeve, 14 viscoelastic material, 15 pad, 16 boat-shaped plate, 17 spring group. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise clearly indicated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0035] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0036] Terminology explanation section: If the terms "install", "connect", "connect", "fixed", etc. appear in the present invention, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, a direct connection, or an indirect connection through an intermediate medium, an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] As introduced in the background technology, there are currently few devices for preventing wind deviation of transmission lines, and their functions and forms are single. In order to solve the above technical problems, the present invention proposes an inertial capacitance type high-voltage transmission line wind deviation suppression energy consumption device.

[0038] In a typical embodiment of the present invention, Figure 1 As shown in the figure, an inertial capacitance type high-voltage transmission line wind deflection suppression energy consumption device is proposed. The device improves the wind deflection prevention effect based on the inertial capacitance system. The positive and reverse thread settings of the positive and reverse threaded screws realize the mutual restraint of the wind deflection of the same-phase transmission line, and has a two-stage working mechanism.

[0039] The following describes the implementation method in detail in combination with the technical solution and the accompanying drawings.

[0040] like Figure 1 As shown, the wind deflection protection device is placed on the transmission tower with the help of the base 4, and the left and right ends of the device are connected to the suspension insulator string through the connector 1. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown, the device includes a connector 1, a pull rod 2, a base 4 and a control box 5; the base 4 is provided at the bottom of the control box 5, and the left and right ends of the control box 5 are respectively connected to the suspension insulator string on the transmission tower through the pull rod 2 and the buffer 3.

[0041] Furthermore, the control box 5 is a rectangular box with two turntables 6 inside the box. The two turntables 6 are fixed on the left and right walls of the box. The two turntables 6 are strung on the positive and negative threaded screws 7, and the two turntables 6 are connected by multiple damping ropes 8 arranged circumferentially; specifically, a bearing support 10 is installed on the outer side of the turntable 6, and the bearing support 10 is fixed on the left and right inner walls of the control box to limit the relative linear motion between the two turntables 6, so that the two turntables 6 can only rotate relative to each other; the positive and negative thread settings of the positive and negative threaded screws 7 convert the translational motion of the pull rod when the same-phase conductor is wind deflected into relative rotation of the two turntables, causing the damping line to undergo elastic deformation and energy consumption, thereby realizing the mutual restraint of the wind deflection of the same-phase transmission line and the coordinated wind deflection suppression energy consumption, improving the anti-wind deflection effect, and forming a first-level wind deflection prevention mechanism.

[0042] Furthermore, the forward and reverse threaded screw rods 7 are arranged in the middle area of the pull rod 2 and pass through the holes on the left and right side walls of the control box 5; the forward and reverse threaded screw rods 7 are located at both ends of the outer side of the control box 5, and two limit blocks 11 are respectively installed to limit the pull rod 2 from producing excessive horizontal displacement, so as to limit the maximum wind deviation angle of the insulator string. The position of the limit block is determined according to the maximum allowable wind deviation angle of the transmission line.

[0043] Furthermore, the aforementioned base 4 includes a pad 15, a boat-shaped plate 16, and a spring assembly 17. The boat-shaped plate 16 is a thin plate with a flat center and upwardly concave edges. The flat center portion of the boat-shaped plate 16 is fixed to the pad 15. Several spring assemblies 17 are positioned between the pad 15 and the concave portion of the boat-shaped plate 16. In this embodiment, the boat-shaped plate 16 is made of lightweight aluminum with good elasticity and is manufactured using an integrated molding process. When the windage angle of the insulator string approaches the maximum allowable windage angle, the stop block 11 abuts against the outside of the box, limiting further movement of the pull rod. Further movement requires the control box 5 to move with it, overcoming the friction at the bottom of the box and compressing the spring assembly 17 to perform work. This enhances the damping effect without adding additional forces to the tower, which could damage it, thereby forming a second-stage windage protection mechanism. Therefore, the entire device proposed in this embodiment has a two-stage operating mechanism, enabling windage protection control at different wind speeds and a wide operating bandwidth. The position of the stop block 11 can be freely adjusted according to the maximum allowable windage angle of the line, providing strong adaptability.

[0044] The connector 1 is composed of two semi-cylindrical structures, which are bonded together by a viscoelastic material 14 to form a cylindrical shape. The inner wall of the cylinder is coated with a flexible insulating material. The pull rod 2 passes through the control box 5, and the ends of the pull rod 2 are respectively connected to the left and right connectors 1.

[0045] Furthermore, a buffer 3 is provided in the middle section of the pull rod 2 located outside the control box. The buffer 3 comprises a spring 12 and a sleeve 13. The spring 12 and sleeve 13 are arranged parallel to their centerlines with a gap between them. The sleeve 13 is sleeved around the outer ring of the spring 12. The sleeve 13 and the ends of the spring 12 connect the other two sections of the pull rod. In a preferred embodiment, the spring 12 is made of SMA material. SMA springs are made of shape memory alloy (SMA), which can automatically restore the device to its original shape after deformation and energy dissipation.

[0046] Furthermore, the above-mentioned forward and reverse threaded screw rod 7 includes two threaded sections with opposite rotation directions, one of which is matched with one of the turntables, and the other is matched with the other turntable.

[0047] Furthermore, the above-mentioned turntable 6 has a certain thickness, where the thickness refers to the size in the cross-sectional direction of the turntable. The turntable has a hole in the center and a thread is provided on the inner ring.

[0048] Specifically, the threads of the inner rings of the two turntables are in opposite directions and are respectively engaged with the positive and negative thread sections of the positive and negative threaded screw rods for transmission connection, so as to facilitate relative rotation.

[0049] In the present invention, the definition of inner side and outer side is: relative to the turntable structure, the side close to the center of the control box is the inner side, and the side close to the outer wall of the box is the outer side.

[0050] In a preferred embodiment, the damping rope 8 is made of highly elastic TPU material, which is used to dissipate energy through elastic deformation and provide self-recovery force. It is arranged parallel to the positive and negative threaded screws. The end of the rope is fixed to the outside of the turntable 6 by an anchor 9, and a gasket is provided between the anchor and the turntable.

[0051] The wind deflection prevention device of the present invention should strictly follow the construction sequence during on-site construction. Figure 1 As shown, for a transmission line that requires windage control, first, a base 4 is set at a suitable position on the transmission tower to place the control box 5, and the connector 1 is formed into a cylindrical shape using viscoelastic material 14 to connect the left and right insulator strings; then, the pull rod 2 is passed through the hole of the control box 5, and the spring 12 and the sleeve 13 are installed to form a buffer, and the horizontal central axis of the control rod, buffer and control box are in a straight line; finally, the pre-selected damping rope 8 is arranged in parallel along the circumference, connected to the two turntables 6 in the control box, and fixed via the anchor 9.

[0052] The specific working process of the wind deflection prevention device of the present invention is as follows:

[0053] according to Figure 1 As shown, the wind deflection prevention device is installed on a transmission tower requiring wind deflection control. When the transmission line is excited by horizontal wind loads, the transmission conductors will deflect vertically. The wind deflection of the insulator string drives the pull rod 2 horizontally. The buffer member 3 first provides a certain buffering effect on the vibration caused by the relatively small pulsating wind. The pull rod 2 then moves horizontally, causing the two turntables 6 on the forward and reverse threaded screws 7 to rotate relative to each other, causing the parallel damping rope 8 to twist and elastically deform, consuming energy to achieve the purpose of preventing wind deflection. At the same time, the elastic restoring force of the stretched damping rope 8 exerts a torque on the turntable 6. The rotation of the turntable drives the forward and reverse threaded screws to reset, and the device returns to its initial operating state. When the wind deflection angle of the insulator string approaches the maximum allowable wind deflection angle, the limit block 11 abuts against the outside of the box, limiting further movement of the pull rod. Further movement requires the control box 5 to move together, overcoming the friction at the bottom of the box and compressing the spring assembly 17 to perform work. This enhances the damping effect without adding additional force to the tower and causing damage to the tower.

[0054] The anti-wind deflection device of the present invention improves the anti-wind deflection effect based on the inertia system. The positive and negative thread settings of the positive and negative thread screws realize the mutual restraint of wind deflection of the same-phase transmission line, and the working effect is significant. At the same time, the present invention has a two-stage working mechanism. The first stage is the rotation of the turntable on the positive and negative thread screws and the deformation of the damping rope. The second stage is the movement of the control box and the compression spring group, which can realize anti-wind deflection control under different wind speeds and has a wide working frequency band; it can be freely adjusted according to the maximum allowable wind deflection angle of the line and has strong adaptability. Furthermore, the present invention is easy to install and does not damage the transmission tower itself. It is light in weight, simple in structure and does not require external energy input, and has good application prospects.

[0055] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An inertial capacitance type high voltage transmission line wind deflection suppression energy consumption device, characterized in that: It includes a connecting piece, a pull rod, a base and a control box. Two turntables are set inside the control box. The two turntables are mounted on the forward and reverse threaded screws and connected by a circumferentially arranged damping rope. The two turntables are connected to the two opposite side walls of the box through bearing supports, so that the turntables can only rotate and cannot move linearly. Both ends of the forward and reverse threaded screw rods pass through the control box and are connected to the pull rods, which are connected to the connecting parts; and a base is arranged at the bottom of the control box, and the base includes a pad, a boat-shaped plate and a spring group, the middle of the boat-shaped plate is flat, and both sides are concave upward, the flat part of the boat-shaped plate is fixed to the pad, and the upward concave part is connected to the pad through the spring group; the forward and reverse threaded screw rods are respectively provided with thread sections in opposite directions on the left and right sides of the central axis of the box body; the turntable has a certain thickness, a hole in the center and the inner ring of the hole is provided with a thread, and the thread directions of the inner rings of the two turntables are opposite, and each engages and transmits the forward and reverse thread sections of the forward and reverse threaded screw rods.

2. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 1, characterized in that: The connecting piece is two semi-cylindrical structures, which are bonded together to form a cylinder, and the inner wall of the cylinder is coated with a flexible insulating material.

3. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 1, characterized in that: A buffer is provided on the pull rod.

4. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 3, characterized in that: The buffer component comprises a spring and a sleeve. The spring and the sleeve are arranged in parallel with a center line thereof and a gap is left between the spring and the sleeve.

5. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 1, characterized in that: The damping rope is made of high-elasticity TPU material and is arranged in parallel with the forward and reverse threaded screw rods.

6. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 1, characterized in that: The end of the damping rope is fixed to the outer side of the turntable by an anchor, and a gasket is arranged between the anchor and the turntable.

7. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 1, characterized in that: Two limit blocks are respectively installed at the two ends of the positive and negative threaded screw rods located outside the box body.

8. The energy dissipation device for suppressing wind deflection of an inertial high-voltage transmission line according to claim 1, characterized in that: The boat-shaped plate is made of a light and highly elastic material.

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