A high-voltage single-circuit overhead transmission line de-icing device

Abstract

The application relates to a high-voltage single-strand overhead power transmission line deicing device, which comprises a casing, a through slot is formed in the middle of the lower part of the casing and penetrates through the front and rear end faces and the bottom face, the through slot is provided with an upper driving wheel and a lower driven wheel for clamping the power transmission line, deicing mechanisms are arranged at the two ends of the casing, the deicing mechanisms comprise an open fixing ring, the opening of the open fixing ring faces downward, a rotatable open rotating ring is arranged on the fixing ring, and blades are arranged on the inner circumferential part of the open rotating ring and extend toward the middle. The high-voltage single-strand overhead power transmission line deicing device is reasonable in design, convenient to disassemble and assemble, can be hoisted on the high-voltage power transmission line through a unmanned aerial vehicle, moves along the power transmission line, deices in the moving process, is high in deicing efficiency, has the power taking function, and solves the power supply problem of the device.

Description

Technical Field

[0001] This invention relates to the fields of power and power transmission, and in particular to a de-icing device for high-voltage single-strand overhead transmission lines. Background Technology

[0002] During rainy and snowy weather in winter, high-voltage overhead transmission lines are prone to icing. If not removed in time, the ice will grow larger and larger, eventually causing the conductors to break or the towers to collapse due to excessive icing. As the weather warms up, the ice on the conductors will gradually melt. When the ice melts and falls off, the conductors may bounce, causing the phase-to-phase distance or the distance to the ground wire to be too close, resulting in line tripping. Therefore, icing on high-voltage overhead transmission lines poses a great threat to the safe operation of the power grid.

[0003] Currently, de-icing of high-voltage overhead transmission lines mainly relies on thermal de-icing and mechanical de-icing methods.

[0004] Thermal de-icing refers to methods that use an additional heat source or the heating of the conductor itself to melt ice and snow. Currently, the three most common thermal de-icing methods are overcurrent de-icing, short-circuit current de-icing, and direct current de-icing.

[0005] (1) Overcurrent de-icing involves passing a transmission current with a higher density than the normal current through the line conductor or ground wire to obtain Joule heat and achieve the purpose of de-icing. Overcurrent de-icing includes de-icing under load, de-icing using a phase-shifting transformer, de-icing with the same phase closed, and de-icing with reactive current. De-icing under load includes de-icing by changing the power flow distribution, de-icing by concentrating the power flow of multi-split conductors, and de-icing using an autotransformer.

[0006] (2) The short-circuit current de-icing method involves short-circuiting a single-phase, two-phase, or three-phase conductor to generate a short-circuit current that heats the conductor and achieves the purpose of de-icing.

[0007] (3) DC de-icing is a technique that uses the principle of short-circuiting through DC voltage to generate heat to melt ice on wires. De-icing mainly utilizes the current heating effect = I^2*R. Under the same voltage or power supply capacity, since the DC resistance is less than the AC impedance, a larger current can be obtained, resulting in a stronger heating effect.

[0008] The main drawbacks of the thermal de-icing method are that it consumes a lot of time, is technically difficult, requires sophisticated equipment, and may affect the normal operation of the power grid system.

[0009] Mechanical de-icing is a method that uses external mechanical force to force ice off conductors. Currently, the main mechanical de-icing methods include ad hoc methods, pulley scraping methods, and electromagnetic de-icing methods.

[0010] (1) The “ad hoc” method is also known as the external force knocking method, which means that the operator knocks on the power transmission line with tools on site to achieve the purpose of de-icing;

[0011] (2) The pulley scraping method is a method in which operators on the ground control the movement of pulleys on the power transmission line, and use force to bend the conductor, thereby breaking the ice.

[0012] (3) Electromagnetic force de-icing method is to short-circuit the transmission line under rated voltage, and the short-circuit current generates appropriate electromagnetic force to cause the conductors to collide with each other and the ice to fall off.

[0013] The main drawbacks of mechanical de-icing methods are: low de-icing efficiency, susceptibility to terrain limitations, low safety, large workload, and very limited application range. Summary of the Invention

[0014] In view of this, the purpose of the present invention is to provide a de-icing device for high-voltage single-strand overhead transmission lines that is easy to install and disassemble and has high de-icing efficiency.

[0015] The present invention is implemented using the following scheme: a de-icing device for a high-voltage single-strand overhead transmission line, comprising a housing, wherein a through groove is provided in the middle of the lower part of the housing, which passes through the front and rear end faces and the bottom face for the transmission line to pass through; an upper driving wheel and a lower driven wheel are provided in the through groove for cooperating and clamping the transmission line; de-icing mechanisms are provided at both ends of the housing, wherein the de-icing mechanism includes an open fixing ring, the opening of the open fixing ring facing downwards, a rotatable open rotating ring is provided on the fixing ring, and a blade extending towards the center is provided on the inner circumference of the open rotating ring.

[0016] Furthermore, at least one end of the housing is provided with a power-taking device, which includes a battery located inside the housing and an open iron core with the opening facing downwards. A coil electrically connected to the battery is wound on the open iron core.

[0017] Furthermore, the housing has cantilever shells at both ends, the top of the opening fixing ring is fixedly connected to the cantilever shell, the opening fixing ring is a hollow structure and the opening rotating ring is located inside the opening fixing ring, the inner circumference of the opening fixing ring is provided with a slot for the blade to pass through; the outer circumference of the opening rotating ring is provided with an external toothed part, and gears that mesh with the external toothed part of the opening rotating ring are respectively provided on the left and right sides above the switch fixing ring.

[0018] Furthermore, the cantilever housing is provided with a rotating shaft, the end of which is connected to the gear shaft of the gear via a synchronous belt and a synchronous pulley, and the rotating shaft is coaxially connected to the main shaft of the first motor inside the housing.

[0019] Furthermore, the left or right half of the housing is divided into an upper housing and a lower housing. The lower housing is hinged to the lower side of the upper housing. The lower driven wheel is rotatably mounted on the lower middle side of the lower housing. The upper housing is provided with a rope mechanism for pulling the lower housing outward. A locking mechanism is provided between the upper housing and the lower housing.

[0020] Furthermore, the locking mechanism includes a fixed seat fixedly connected to the outside of the upper housing and a limiting seat fixedly connected to the outside of the lower housing. A pin screw is provided on the fixed seat, and a limiting hole is provided on the limiting seat that can be inserted and engaged with the pin screw. A worm gear is rotatably connected inside the fixed seat, and a threaded hole is provided in the middle of the worm gear that is threaded and engaged with the pin screw. A second motor is provided inside the upper housing, and a worm gear that meshes with the worm gear is coaxially connected to the main shaft of the second motor.

[0021] Furthermore, the rope pulling mechanism includes a rope, and the upper housing is provided with a winding wheel driven by a fourth motor. The rope is wound around the winding wheel, and the lower end of the rope is connected to the outside of the lower housing. The side wall of the upper housing is provided with a through hole for the rope to pass through.

[0022] Furthermore, there are two upper drive wheels, with a fifth motor located between them. The main shaft of the fifth motor is connected to the wheel axle of the two upper drive wheels via a synchronous belt and a synchronous pulley.

[0023] Compared with the prior art, the present invention has the following advantages: The de-icing device for high-voltage single-strand overhead transmission lines of the present invention is reasonably designed and easy to assemble and disassemble. It can be hoisted onto the high-voltage transmission line by a drone. The entire de-icing device moves along the transmission line and performs de-icing during the movement. It has high de-icing efficiency and also has a power supply function, which solves the power supply problem of the device.

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0025] Figure 1 This is a left view of an embodiment of the present invention;

[0026] Figure 2 This is a front view of an embodiment of the present invention that excludes the de-icing mechanism and the power supply device;

[0027] Figure 3 yes Figure 2 A partial sectional view;

[0028] Figure 4 This is a front view of the de-icing mechanism according to an embodiment of the present invention;

[0029] Figure 5 This is a front view of the power-gathering device according to an embodiment of the present invention;

[0030] Figure 6 This is a front view of the lower housing in the open state according to an embodiment of the present invention;

[0031] Explanation of the numbers in the diagram: 100-House, 110-Through groove, 120-Upper driving wheel, 130-Lower driven wheel, 140-Cantilever shell, 150-Upper shell, 160-Lower shell, 170-Fifth motor, 200-De-icing mechanism, 210-Open fixing ring, 220-Open rotating ring, 230-Blade, 240-Gear, 250-Shaft, 260-First motor, 300-Power supply device, 310-Open iron core, 320-Coil, 400-Locking mechanism, 410-Fixed seat, 420-Limit seat, 430-Pin screw, 440-Worm gear, 450-Second motor, 460-Worm, 500-Rope pulling mechanism, 510-Rope pulling, 520-Turning wheel, 530-Fourth motor, 600-Power transmission line. Detailed Implementation

[0032] It should be noted that the following detailed descriptions are exemplary and 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 one of ordinary skill in the art to which this application pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] like Figures 1-6 As shown, a de-icing device for a high-voltage single-strand overhead transmission line includes a housing 100. A through groove 110, penetrating the front and rear end faces and the bottom face of the housing, allows the transmission line to pass through. An upper driving wheel 120 and a lower driven wheel 130 are provided in the through groove 110 to clamp the transmission line. De-icing mechanisms 200 are provided at both ends of the housing. Each de-icing mechanism 200 includes an open fixing ring 210 with its opening facing downwards. A rotatable open rotating ring 220 is provided on the fixing ring, and a blade 230 extending towards the center is provided on the inner circumference of the open rotating ring. This de-icing device can be hoisted onto the high-voltage transmission line by a drone. A hoisting ring can be provided on the upper side of the housing 100. The upper driving wheel 120 and the lower driven wheel 130 serve as traveling wheels, enabling the de-icing device to move along the transmission line. During movement, the blades rotate to de-ice the transmission line.

[0035] In this embodiment, at least one end of the casing is provided with a power-harvesting device 300. The power-harvesting device 300 includes a battery located inside the casing 100 and an open iron core 310 with its opening facing downwards. A coil 320 electrically connected to the battery is wound around the open iron core. Based on the principle of electromagnetic induction, the power-harvesting device obtains electrical energy from the transmission line, and after rectification and voltage stabilization, the voltage is reduced to the 12V DC power required by the device. The principle and structure of the power-harvesting device are existing technologies. This invention applies power-harvesting technology to this de-icing device to solve the power supply problem. Chinese patent CN204046283U, "10kV Distribution Network Line Electromagnetic Induction Power Harvesting Multi-output Device," and Chinese patent CN201185355Y, "High Voltage Line Induction Power Harvesting Device," both describe power-harvesting circuit structures. Although the open iron core 310 of this invention is not a fully enclosed structure, it can still complete the power harvesting operation.

[0036] In the initial state, the opening of the open rotating ring 220 faces downwards when the device rotates and stops, allowing the transmission line to enter the middle through the openings of the open iron core, the open fixed ring, and the open rotating ring. The device can then wrap the conductor from above, and when leaving, the device can be lifted away directly by a drone.

[0037] In this embodiment, the housing has cantilever shells 140 at both ends. The top of the opening fixing ring is fixedly connected to the cantilever shell. The opening fixing ring is a hollow structure, and the opening rotating ring is located inside the opening fixing ring. The inner circumference of the opening fixing ring has a groove for the blade to pass through. The outer circumference of the opening rotating ring has external teeth. Gears 240 that mesh with the external teeth of the opening rotating ring are respectively provided on the left and right sides above the switch fixing ring. The arrangement of two gears, one on the left and one on the right, ensures that at least one gear and the opening rotating ring are in a meshing state, thereby maintaining power transmission.

[0038] In this embodiment, a rotating shaft 250 is provided inside the cantilever housing. The end of the rotating shaft is connected to the gear shaft of the gear through a synchronous belt and a synchronous pulley. The rotating shaft is coaxially connected to the main shaft of the first motor 260 inside the housing.

[0039] In this embodiment, the left or right half of the housing is divided into an upper housing 150 and a lower housing 160. The lower housing is hinged to the lower side of the upper housing. The lower driven wheel is rotatably mounted on the downward-facing middle side of the lower housing. The upper housing is provided with a rope mechanism 500 for pulling the lower housing outward, and a locking mechanism 400 is provided between the upper and lower housings. To prevent the lower driven wheel from obstructing the entry and exit of the power transmission line, the lower housing on which the lower driven wheel is mounted is designed as an openable structure. When the device is installed on the power transmission line and when it leaves the power transmission line, the lower housing opens outward to allow the power transmission line to enter smoothly. After the conductor enters the device, the lower housing closes, so that the lower driven wheel and the upper driving wheel cooperate to clamp the power transmission line. The upper driving wheel can move along the line by rotating.

[0040] In this embodiment, the locking mechanism 400 includes a fixed base 410 fixedly connected to the outside of the upper housing and a limiting base 420 fixedly connected to the outside of the lower housing. A pin screw 430 is threaded through the fixed base, and the limiting base has a limiting hole for engaging with the pin screw. A worm gear 440 is rotatably connected inside the fixed base, and the worm gear has a threaded hole in the middle for threaded engagement with the pin screw. A second motor 450 is located inside the upper housing, and the main shaft of the second motor is coaxially connected to a worm 460 that meshes with the worm gear. The second motor drives the worm gear to rotate via the worm, thereby causing the pin screw to rise and fall. When the pin screw descends, its lower end inserts into the limiting hole; when the pin screw rises, it exits from the limiting hole. The lower end of the pin screw is tapered.

[0041] When the device is installed on or away from the power transmission line, the pin screw moves up to a position where the lower housing can be opened sufficiently. The rope pulling mechanism pulls the lower housing outward to allow the power transmission line to enter smoothly. After the power transmission line enters the device, the rope pulling mechanism is released, the lower housing is lowered, and at the same time, the pin screw moves down and inserts into the limiting hole to fix the lower housing in the closed state.

[0042] In this embodiment, the rope pulling mechanism 500 includes a rope 510. The upper housing is provided with a winding wheel 520 driven to rotate by a fourth motor 530. The rope is wound around the winding wheel, and the lower end of the rope is connected to the outside of the lower housing. The side wall of the upper housing is provided with a through hole for the rope to pass through. In order to prevent the lower housing from getting stuck and unable to be opened, the outside of the lower housing is provided with a connecting rod that extends outward to connect to the rope, so as to change the direction of the rope tension.

[0043] In this embodiment, there are two upper drive wheels, and a fifth motor 170 is provided between the two upper drive wheels. The main shaft of the fifth motor is connected to the wheel axle of the two upper drive wheels through a synchronous belt and a synchronous pulley.

[0044] In the specific implementation process, in order to prevent the de-icing device from flipping up and down during operation, components such as batteries can be installed at the bottom of the casing or counterweights can be set at the bottom of the casing to ensure that the center of gravity of the entire de-icing device is located at the bottom (i.e., below the axis of the open iron core and the open rotating ring).

[0045] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0046] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0047] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0048] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A de-icing device for a high-voltage single-strand overhead transmission line, characterized in that: The device includes a housing. A through-slot is formed in the lower center of the housing, connecting the front and rear end faces and the bottom, through which a power transmission line passes. An upper driving wheel and a lower driven wheel are provided in the through-slot to clamp the power transmission line. De-icing mechanisms are located at both ends of the housing. Each de-icing mechanism includes an open fixing ring with its opening facing downwards. A rotatable open rotating ring is provided on the fixing ring, and a blade extending inwards is provided on the inner circumference of the open rotating ring. At least one end of the housing has a power-taking device, which includes a battery located inside the housing and an open iron core with its opening facing downwards. A coil electrically connected to the battery is wound around the open iron core. Cantilever shells are located at both ends of the housing. The top of the open fixing ring is fixedly connected to the cantilever shell. The open fixing ring is hollow, and the open rotating ring is located inside the open fixing ring. A slot is provided on the inner circumference of the open fixing ring for the blade to pass through. An external toothed portion is provided on the outer circumference of the open rotating ring, and teeth that mesh with the external teeth of the open rotating ring are respectively provided on the left and right sides above the switch fixing ring. The housing is divided into an upper housing and a lower housing, with the lower housing hinged to the lower side of the upper housing. The lower driven wheel is rotatably mounted on the lower center side of the lower housing. The upper housing is provided with a pull rope mechanism for pulling the lower housing outward, and a locking mechanism is provided between the upper and lower housings. The locking mechanism includes a fixed seat fixedly connected to the outside of the upper housing and a limiting seat fixedly connected to the outside of the lower housing. A pin screw passes through the fixed seat, and the limiting seat is provided with a mechanism that can engage with... The upper housing has a limiting hole for inserting and engaging the pin screw. A worm gear is rotatably connected inside the fixed base, and the worm gear has a threaded hole in the middle that engages with the pin screw. A second motor is located inside the upper housing, and a worm gear that meshes with the worm gear is coaxially connected to the main shaft of the second motor. The rope pulling mechanism includes a rope. A winding wheel driven by a fourth motor is located inside the upper housing. The rope is wound around the winding wheel, and the lower end of the rope is connected to the outside of the lower housing. A through hole is provided on the side wall of the upper housing for the rope to pass through.

2. The de-icing device for high-voltage single-strand overhead transmission lines according to claim 1, characterized in that: The cantilever housing is equipped with a rotating shaft. The end of the rotating shaft is connected to the gear shaft of the gear through a synchronous belt and a synchronous pulley. The rotating shaft is coaxially connected to the main shaft of the first motor inside the housing.

3. The de-icing device for high-voltage single-strand overhead transmission lines according to claim 1, characterized in that: There are two upper drive wheels, and a fifth motor is located between the two upper drive wheels. The main shaft of the fifth motor is connected to the wheel axle of the two upper drive wheels through a synchronous belt and a synchronous pulley.

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