A power transmission tower ice-resistant structure suitable for blizzard weather

Abstract

The application relates to the technical field of power transmission and discloses a power transmission tower anti-icing structure suitable for snowy weather, which comprises an upper shell and a lower shell rotatably arranged on a power transmission tower core rod, a lead screw is externally provided with a switching device, the outer side of the lower shell is provided with a plurality of scraping components, and a clutch device is arranged between the lead screw and a servo motor. The switching device changes the matching relationship between the lead screw and different scraping components by moving along the lead screw, so that different scraping components are sequentially contacted with or separated from insulator sheds; the scraping component comprises a flexible scraper and an ice breaking structure, the scraping distance of the scraper is adjusted through the switching device, and the scraping component can be switched between a water and snow cleaning state and an ice layer breaking state. The application reduces the resistance of multiple scrapers working at the same time, improves the operation stability of the device, breaks the ice layer structure in the initial ice layer formation stage through the ice breaking structure, reduces the icing accumulation risk of the insulator, and is suitable for the anti-icing maintenance of the insulator of the power transmission line in a severe environment such as high cold and snowstorm.

Description

Technical Field

[0001] This invention relates to the field of power transmission technology, and in particular to an anti-icing structure for power transmission towers suitable for blizzard weather. Background Technology

[0002] As power transmission lines extend into high-altitude and frigid regions, insulators in these lines are subjected to complex environments including low temperatures, strong winds, snowfall, and freeze-thaw cycles. During winter operation, rain, snow, fog, and moisture from the air easily accumulate on the surface of the insulator skirts. As the ambient temperature continues to drop, this moisture gradually freezes, forming ice. Since insulators typically rely on the tortuous creepage path created by the skirts to improve insulation performance, when ice layers between multiple skirts gradually connect, the ice layer forms a continuous conductive channel. This allows current to bypass the original skirt structure and leak along the ice layer, reducing the effective creepage distance of the insulator and increasing the risk of flashover accidents in the transmission lines.

[0003] In existing technologies, to reduce the impact of insulator icing, wind-driven scraper structures are typically used to continuously clean water and snow from the insulator skirts, making it difficult for water to remain on the skirt surface and thus reducing the probability of icing formation. While such devices can improve the snow accumulation problem on insulator surfaces to some extent, they still have certain shortcomings in practical applications. Firstly, existing scraper structures usually contact multiple skirts simultaneously. During wind-driven operation, the frictional resistance between multiple scrapers and skirts must be overcome simultaneously, resulting in high overall operating resistance and requiring high driving force. This can easily lead to operational instability in situations with insufficient wind or high environmental resistance. Secondly, in cold regions, icing is not solely formed by snow accumulation. When water on the skirt surface freezes to form an ice layer, its adhesion strength to the insulator surface is significantly higher than that of loose snow. Traditional flexible scrapers can only remove weakly attached water and snow, and are unable to effectively break up existing ice layers, thus failing to fundamentally solve the problem of continuous ice growth.

[0004] Furthermore, because transmission lines are exposed to low temperatures for extended periods, the transmission structure of de-icing devices is also susceptible to freezing. For example, rotating parts and connecting components may become stagnant due to icing, affecting the reliable operation of the device. At the same time, most existing devices lack proactive intervention methods for the ice formation process, typically only removing ice after it has formed, failing to fully utilize the low adhesion strength of ice in its early stages for preventative ice breaking.

[0005] Therefore, in response to the problem of gradual ice accumulation on insulators in high-altitude and cold regions, there is a need for an anti-icing structure for transmission towers suitable for blizzard weather. This structure should be able to reduce scraping resistance, achieve regional cyclic cleaning, actively break down the ice structure in the early stages of ice formation, and ensure the continuous cleanliness of the skirt surface, thereby improving the operational reliability of insulators. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides an anti-icing structure for power transmission towers suitable for blizzard weather, comprising: an upper shell, wherein the upper shell is sleeved on the outside of the core rod of the power transmission tower and rotatably connected to the core rod; and a lower shell is provided on the lower side of the upper shell, wherein the lower end of the lower shell is rotatably connected to the core rod. A servo motor is provided on the top of the upper housing. A gear set is provided inside the upper housing and between the servo motor and the mandrel. The gear set is used to drive the upper housing and the lower housing to rotate around the mandrel. A lead screw is rotatably installed inside the lower housing. At least two sets of switching devices are provided on the outside of the lead screw. A clutch device is provided between the top of the lead screw and the drive end of the servo motor. The clutch device is used to control the power transmission between the lead screw and the servo motor. Several scraping components are slidably installed on the outer wall of the lower housing, on the side near the insulator skirt of the transmission line.

[0007] Preferably, the gear set includes a first gear disposed at the drive end of the servo motor, a second gear disposed on the outer wall of the mandrel and inside the upper housing, and at least two third gears rotatably mounted inside the upper housing. The plurality of third gears are sequentially meshed and connected, with the third gear near the mandrel meshing with the second gear and the third gear near the servo motor meshing with the first gear.

[0008] Preferably, the switching device includes a slider, which is sleeved on the outside of the lead screw and helically connected to the lead screw. The slider is slidably connected to the inner wall of the lower housing. Two elongated grooves are arranged parallel to each other on the side of the slider near the mandrel. A wheel axle is installed between the two elongated grooves and is slidably disposed in the elongated groove. The elongated groove extends in a direction perpendicular to the axis of the mandrel so that the wheel axle can reciprocate in a direction perpendicular to the axis of the mandrel. A pulley is provided on the wheel axle and coaxially arranged with it. A first electromagnet is provided on the slider. A stop block is slidably installed on the outside of the slider. The stop block has an overall L-shaped structure and a wedge-shaped structure at its top. When the first electromagnet attracts the stop block to move, the wedge-shaped structure pushes the pulley to move along the elongated groove.

[0009] Preferably, the scraping assembly includes a connecting handle, which is inserted into the outer wall of the lower housing and slidably connected to the lower housing. One end of the connecting handle located inside the lower housing is provided with an abutment block. The abutment block has a trapezoidal structure, and the side of the abutment block near the pulley is provided with an arc-shaped groove that matches the shape of the pulley. The end of the connecting handle away from the abutment block is provided with a scraper. A first spring is provided on the outer ring surface of the connecting handle between the inner wall of the lower housing and the abutment block. The first spring is in a compressed state.

[0010] Preferably, the scraper has a triangular overall structure, and the side of the scraper facing the insulator skirt is set with a serrated structure. There are two scrapers, which are respectively set on both sides of the connecting handle and the serrations are staggered.

[0011] Preferably, the clutch device includes a first protrusion disposed at the drive end of the servo motor, a boss provided on the outer wall of the lead screw and inside the upper housing, a second protrusion provided on the top of the lead screw that can move up and down along the lead screw axis, a second spring provided between the second protrusion and the boss, the second spring being in a compressed state; the first protrusion and the second protrusion mesh with each other under the action of the second spring, so that the servo motor drives the lead screw to rotate; a second electromagnet is provided inside the boss, and when the second electromagnet is energized, it attracts the second protrusion to move along the axial direction, so that the second protrusion separates from the first protrusion.

[0012] Preferably, a pressure sensor is provided on the lower side of the stop near the bottom. The pressure sensor is used to detect the bottoming state of the stop and control the servo motor to rotate in the opposite direction.

[0013] Preferably, the system also includes a solar panel, a solar controller, and a battery. The solar panel is electrically connected to the battery via the solar controller, and the battery is electrically connected to the servo motor, the first electromagnet, and the second electromagnet via a power management module to provide power to the servo motor, the first electromagnet, and the second electromagnet.

[0014] Preferably, it also includes a wind-driven component, which is connected to the gear set for driving the upper and lower housings to rotate around the mandrel using the wind power in the area where the power transmission line is located; a first clutch structure is provided between the wind-driven component and the lead screw, and a second clutch structure is provided between the servo motor and the gear set, so that the power transmission between the lead screw and the gear set is cut off when the wind-driven component is running, and the lead screw is controlled to rotate by the servo motor when ice breaking is required.

[0015] Preferably, it also includes a control module, which is electrically connected to the servo motor, the first electromagnet and the second electromagnet. The control module obtains the rotation angle of the lead screw based on the number of rotations of the servo motor, and calculates the moving distance of the slider in combination with the lead screw lead, so as to determine whether the switching device has moved to the position of the corresponding scraping component, and controls the first electromagnet to switch the scraping component between the separation state, the scraping state and the ice breaking state.

[0016] The beneficial effects of this invention are reflected in the fact that, by adding a switching device to the existing scraper structure, multiple scrapers no longer maintain continuous contact with multiple insulator skirts. Instead, a single scraper or a portion of the scrapers sequentially contacts the corresponding skirts according to a preset order, while the remaining scrapers are temporarily separated from the skirts. This method reduces the number of forces simultaneously applied to the scrapers during operation, reduces frictional resistance, enables the device to operate stably under conditions of lower driving force, and reduces the risk of the device failing to operate in environments with insufficient wind power.

[0017] The scraper structure in this application further incorporates ice-breaking scraper claws and a flexible scraper. The ice-breaking scraper claws utilize a sharp structure to reduce the contact area with the ice layer, increasing local pressure. This effectively disrupts the internal structure of the ice layer in its early stages of formation, reducing the likelihood of further ice growth and the connection of multiple insulator skirts. The flexible scraper maintains close contact with the surface of the insulator skirts, promptly clearing accumulated water and snow during daily operation, thus reducing the conditions for ice formation at the source. By combining rigid ice breaking with flexible cleaning, the device can not only handle minor icing after it has formed but also prevent further icing from developing.

[0018] This application addresses the characteristics of gradual ice formation by actively intervening during the stage when the ice layer is thin and the adhesion strength is low. Compared with the traditional method of simply scraping off the already formed thick ice layer, this reduces the difficulty of de-icing, improves the de-icing efficiency, and reduces the problem of decreased insulation performance caused by ice layer connecting multiple umbrella skirts.

[0019] This application can also install heating components at key transmission locations to provide auxiliary heating to easily frozen rotating connection parts, reducing mechanical jamming caused by icing in low-temperature environments and improving the long-term operational stability of the device. Simultaneously, the heating components can also provide auxiliary heating to the scraper structure, reducing the ice strength when the scraper contacts the ice layer, further enhancing the ice-breaking effect.

[0020] This application features an independent drive structure and can be powered by wind power, solar power, or other means, enabling the device to adapt to long-distance, unattended operation environments of power transmission lines and reducing manual inspection and de-icing maintenance costs.

[0021] In summary, this application achieves preventive control and active de-icing of the insulator icing process through structural designs such as scraper switching working mode, combination of ice-breaking scraper claw and flexible scraper, anti-freezing of transmission parts, and active energy supply. Compared with the existing technology, it can reduce operating resistance, improve de-icing reliability, and enhance the operational safety of insulators of transmission lines in high-altitude and cold regions. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall appearance of the present invention.

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the cross-sectional structure.

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A.

[0025] Figure 4 This is a schematic diagram of the scraping component structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the switching device of the present invention in different states.

[0027] Figure label: 1. Upper housing; 2. Core rod; 3. Lower housing; 4. Lead screw; 5. Servo motor; 6. First gear; 7. Second gear; 8. Third gear; 9. Slider; 10. Long slide groove; 11. Pulley; 12. First electromagnet; 13. Stop block; 14. Connecting handle; 15. Abutment block; 16. Scraper; 17. First spring; 18. First protrusion; 19. Boss; 20. Second protrusion; 21. Second spring; 22. Second electromagnet. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Reference Figures 1-5 , Example 1: Periodic Ice-Breaking and Scraping Method for Insulators Based on Slider Position Detection Step 1: After the equipment is started, the servo motor drives the gear set to rotate the upper and lower housings around the core rod, causing the scraping assembly on the lower housing to move circumferentially along the insulator skirt, while controlling the switching device to be in the initial position. Step 2: The servo motor drives the lead screw to rotate, causing the slider sleeved on the lead screw to move along the lead screw axis. The rotation angle of the lead screw is calculated by the number of rotations of the servo motor, and the actual moving distance of the slider is obtained by converting the lead screw lead. Step 3: When the slider moves to the preset scraping position, control the servo motor to stop driving the lead screw and activate the clutch device to disconnect the power connection between the lead screw and the servo motor, so that the switching device remains in the current corresponding position. Step 4: Control the first electromagnet to be de-energized so that the stop block remains in its initial position. At this time, the roller is located at the rear end of the elongated hole. When the roller contacts the scraper, the scraper only extends outward by a first distance, so that the flexible scraper contacts the surface of the insulator skirt and cleans the water and snow on the surface of the skirt. Step 5: After the current umbrella skirt position is cleaned, the clutch device is re-engaged to allow the lead screw to continue rotating, driving the slider to the next cleaning position. The above steps are repeated so that multiple scrapers clean different umbrella skirts in sequence.

[0030] By using the above method, multiple scrapers do not need to contact multiple skirts simultaneously, reducing frictional resistance during device operation and improving operational stability in low-temperature environments.

[0031] Example 2: Active ice-breaking and scraping method based on ice layer formation state switching Step 1: Control the servo motor to drive the lead screw, so that the slider moves to the corresponding scraper position. The servo motor controls the slider movement distance according to the preset number of rotations, and judges whether the current switching device has reached the target position by the movement distance. Step 2: When the slider reaches the target position, the clutch is disengaged to stop the screw from moving, while the upper and lower housings continue to rotate around the mandrel. Step 3: In a lightly icy environment, keep the first electromagnet de-energized so that the block is in the initial position and the roller is limited by the rear end of the elongated hole. When the roller comes into contact with the scraper, the scraper moves outward a short distance so that the flexible scraper fits against the umbrella skirt surface to scrape. At this time, the ice-breaking scraper and the umbrella skirt maintain a distance. Step 4: When the ice thickness is detected to increase or ice breaking is required, the first electromagnet is energized to move the stop block upward and occupy the space behind the roller, so that the roller moves a greater distance when it is subjected to the action of the abutment part. Step 5: The roller pushes the scraper to move further outward, causing the flexible scraper to be compressed and deformed. At the same time, the ice-breaking scraper approaches the surface of the umbrella skirt and breaks the ice structure through the toothed structure on the ice-breaking scraper. Step six: Control the servo motor to run in both forward and reverse directions alternately, so that the scraper moves back and forth. Since the ice-breaking teeth are arranged in a staggered manner on both sides of the scraper, the ice layer is subjected to forces in different directions, which improves the integrity of ice breaking.

[0032] The above method can be used to break the ice structure in the early stage of ice formation, reduce the probability of ice continuing to grow when the ice layer is thin, and avoid continuously applying excessive mechanical resistance.

[0033] Example 3: An energy-saving anti-icing control method based on wind power and electric motor assistance Step 1: During the operation of the transmission line, the control system is powered by solar power components installed near the device, and the wind power components are driven by the continuous wind power in the plateau region, so that the device can operate with low power consumption. Step 2: In normal environment, the wind-driven mechanism drives the gear set to rotate the upper and lower shells around the core rod. At the same time, the reciprocating screw structure controls the switching device to move back and forth along the preset path, so that the scraping component can periodically clean the water and snow on the umbrella skirt surface. Step 3: When the ambient temperature decreases or the risk of icing increases, the control system starts the servo motor and calculates the slider movement distance based on the number of rotations of the servo motor, so that the switching device can be accurately moved to the corresponding scraper position. Step 4: After the slider moves to the target position, control the clutch device to disconnect the screw power, so that the screw stops rotating and prevents the wind-driven mechanism from continuously driving the switching device to move. Step 5: Control the first electromagnet to move according to the ice-covered state, so that the corresponding scraper switches between the scraping state and the ice-breaking state. Step six: After the ice breaking is completed, control the first electromagnet to turn off the power, so that the block returns to its original position, the scraper retracts to the scraping state, and continues to use the flexible scraper to clean the residual moisture on the umbrella skirt surface.

[0034] The above control method enables the device to prioritize the use of natural energy to maintain operation in high-altitude and windy environments, and to activate the servo motor for precise control only when ice breaking is required, thereby reducing energy consumption and improving the long-term operation capability under unattended conditions.

[0035] Example 4: This example provides an anti-icing structure for power transmission towers suitable for blizzard weather, including an upper shell, a lower shell, a gear set, a lead screw, a switching device, a scraping assembly, and a clutch device.

[0036] In this embodiment, the anti-icing structure is installed on the outside of the core rod of the transmission line insulator string. Both the upper and lower housings are fitted over the core rod and rotatably connected to it via bearings, allowing them to rotate around the core rod's axis. A servo motor is mounted on the top of the upper housing. The output of the servo motor is connected to a gear set, which includes multiple meshing gears. Through the gear set's reduction transmission, the power output by the servo motor is transmitted to the upper and lower housings, thereby driving the scraping assembly located on the outside of the lower housing to rotate around the core rod.

[0037] A lead screw is rotatably mounted inside the lower housing, positioned along the axial direction of the mandrel. A slider is threadedly connected to the outer side of the lead screw, and the slider is slidably connected to the inner wall of the lower housing, allowing the lead screw to rotate and drive the slider to move along the axial direction of the mandrel. A clutch device is installed between the top of the lead screw and the servo motor. When the position of the switching device needs to be adjusted, the clutch device is engaged, allowing the servo motor to drive the lead screw to rotate. When the switching device moves to the corresponding position, the clutch device disengages, stopping the lead screw from transmitting power and thus keeping the switching device in its current position.

[0038] The slider is equipped with at least two sets of switching devices, each including a pulley, an axle, and a stop. The axle is slidably mounted in a long groove on the slider, which extends perpendicular to the axis of the mandrel, allowing the axle to move closer to or further away from the mandrel. A first electromagnet is mounted on the slider, controlling the movement of the stop. The stop has a wedge-shaped structure at its upper end. When the first electromagnet attracts the stop, the stop pushes the pulley along the long groove, thereby changing the contact distance between the pulley and the scraping assembly.

[0039] The scraping assembly includes a connecting handle, an abutment block, and a scraper. The connecting handle is slidably mounted on the outer wall of the lower housing. An abutment block is located at one end of the connecting handle inside the lower housing. The abutment block has an arc-shaped groove matching the pulley's shape on its side near the pulley. A first spring is located on the outer side of the connecting handle. When the pulley contacts the abutment block, the pulley pushes the abutment block to move, causing the connecting handle to move the scraper towards the insulator skirt. When the pulley leaves the corresponding abutment block, the first spring releases its elastic force, causing the connecting handle to retract the scraper, thereby separating the scraper from the insulator skirt.

[0040] Example 5: In this example, the scraper includes a flexible scraper and an ice-breaking scraper. The flexible scraper is made of an elastic, low-temperature resistant material and is used to adhere to the surface of the insulator skirt to remove accumulated water and snow. The ice-breaking scraper is located on both sides of the flexible scraper, and the side of the ice-breaking scraper facing the skirt has a toothed structure to increase the local pressure and break the ice structure. Since the scraper needs to adapt to both forward and reverse rotation processes, the ice-breaking scrapers are respectively located on both sides of the scraper, and the toothed structures of the ice-breaking scrapers on both sides are staggered, so that the scraper can act on the ice layer from different directions during reciprocating motion, thereby improving the ice-breaking effect.

[0041] In this embodiment, the scraper has three working states: separation state, sweeping state, and ice-breaking state.

[0042] When the device is in the disengaged state, the lead screw drives the slider to move, causing the switching device to leave the position of the corresponding scraping component. At this time, the pulley no longer contacts the abutment block, and the connecting handle moves backward under the action of the first spring, causing the scraper to move away from the insulator skirt, thereby reducing the frictional resistance during the operation of the device.

[0043] When the device is in scraping mode, the first electromagnet is de-energized, the stop block is in its initial position, and the pulley is limited by the rear end of the long groove. When the pulley contacts the abutment block, due to the small distance the pulley can move, the connecting handle only extends outward a certain distance, allowing the flexible scraper to contact the surface of the insulator skirt, while the ice-breaking scraper remains at a distance from the skirt. At this time, the accumulated water and snow on the surface of the skirt can be cleaned, preventing the water from freezing further and forming an ice layer.

[0044] When the device is in ice-breaking mode, the first electromagnet is energized and attracts the stop block, causing the stop block to move to the rear of the pulley and restricting the pulley's retraction space. When the pulley contacts the abutment block again, the pulley pushes the connecting handle to move further outward, causing the flexible scraper to compress and deform. At the same time, the ice-breaking scraper approaches the ice layer on the umbrella skirt surface, and the toothed structure on the ice-breaking scraper breaks the ice layer's connecting structure, reducing the possibility of the ice layer continuing to thicken.

[0045] Furthermore, to improve the reliability of the device in low-temperature environments, this embodiment includes heating components in locations susceptible to freezing, such as the lead screw, axle, pulley, and clutch mechanism. These heating components can be resistance heating elements, flexible heating films, or heating wires, and are electrically connected to the battery. When the ambient temperature decreases, the heating components preheat the aforementioned moving parts, stabilizing the transmission clearance and preventing problems such as lead screw jamming, pulley immobility, and clutch disengagement failure due to freezing.

[0046] Meanwhile, heating components are installed inside the scraper or at the connection point between the scraper and the connecting handle to ensure the scraper is at a certain temperature before ice-breaking operations. Auxiliary heating of the ice-breaking scraper reduces the bonding strength between the ice layer and the scraper, making it easier for the scraper to break down the ice structure, reducing mechanical forces, and improving ice-breaking efficiency. For flexible scrapers, heating maintains the material's flexibility in low-temperature environments, allowing the flexible scraper to continuously adhere to the insulator skirt surface, improving the water removal effect.

[0047] Example 6: This example also includes a solar power supply component, comprising a solar panel, a solar controller, and a battery. The solar panel charges the battery through the solar controller, and the battery provides operating power to the servo motor, the first electromagnet, the second electromagnet, and the heating component through a power management module. In windy environments at high altitudes, a wind-driven component can be added to assist operation. Under normal conditions, it utilizes natural wind power for low-power operation, activating the servo motor only when ice breaking or precise positioning is required, thereby reducing overall energy consumption.

[0048] During operation of this embodiment, the control module can obtain the rotation angle of the servo motor based on the number of rotations fed back by the servo motor encoder, and calculate the slider movement distance in combination with the lead screw lead to determine whether the switching device has moved to the corresponding scraping component position. When the slider reaches the target position, the control clutch is disengaged, causing the lead screw to stop moving, and the first electromagnet is controlled to move according to the icing state, so that the scraper switches between the separation state, the scraping state, and the ice-breaking state.

[0049] With the above structure, this embodiment enables multiple scrapers to work sequentially in a set order, avoiding the problem of excessive running resistance caused by multiple scrapers contacting multiple skirts at the same time. At the same time, by combining flexible scraping with active ice breaking, the ice structure is destroyed in time in the early stage of ice formation, improving the anti-icing ability of transmission line insulators. It is suitable for long-term unattended operation in harsh environments such as high altitude and heavy snow.

[0050] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0051] In the description of embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0053] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0054] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range between two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0055] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-icing structure for power transmission towers suitable for blizzard weather, characterized in that, include: An upper housing is fitted around the outside of the core rod of the transmission tower and is rotatably connected to the core rod. A lower housing is provided on the lower side of the upper housing, and the lower end of the lower housing is rotatably connected to the core rod. A servo motor is provided on the top of the upper housing. A gear set is provided inside the upper housing and between the servo motor and the mandrel. The gear set is used to drive the upper housing and the lower housing to rotate around the mandrel. A lead screw is rotatably installed inside the lower housing. At least two sets of switching devices are provided on the outside of the lead screw. A clutch device is provided between the top of the lead screw and the drive end of the servo motor. The clutch device is used to control the power transmission between the lead screw and the servo motor. A scraping assembly is slidably installed on the outer wall of the lower housing, on the side near the insulator skirt of the transmission line.

2. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 1, characterized in that: The gear set includes a first gear, which is located at the drive end of the servo motor. A second gear is provided on the outer wall of the mandrel and inside the upper housing. At least two third gears are rotatably installed inside the upper housing. The multiple third gears are sequentially meshed and connected. The third gear near the mandrel meshes with the second gear, and the third gear near the servo motor meshes with the first gear.

3. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 1, characterized in that: The switching device includes a slider, which is sleeved on the outside of the lead screw and helically connected to the lead screw. The slider is slidably connected to the inner wall of the lower housing. Two elongated grooves are arranged parallel to each other on the side of the slider near the mandrel. A wheel axle is installed between the two elongated grooves and is slidably disposed in the elongated groove. The elongated groove extends in a direction perpendicular to the axis of the mandrel so that the wheel axle can reciprocate in a direction perpendicular to the axis of the mandrel. A pulley is provided on the wheel axle and coaxially arranged with it. A first electromagnet is provided on the slider. A stop block is slidably installed on the outside of the slider. The stop block has an overall L-shaped structure and a wedge-shaped structure at its top. When the first electromagnet attracts the stop block to move, the wedge-shaped structure pushes the pulley to move along the elongated groove.

4. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 1, characterized in that: The scraping assembly includes a connecting handle, which is inserted into the outer wall of the lower housing and slidably connected to the lower housing. One end of the connecting handle located inside the lower housing is provided with an abutment block. The abutment block has a trapezoidal structure, and the side of the abutment block near the pulley is provided with an arc-shaped groove that matches the shape of the pulley. The end of the connecting handle away from the abutment block is provided with a scraper. A first spring is provided on the outer ring surface of the connecting handle between the inner wall of the lower housing and the abutment block. The first spring is in a compressed state.

5. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 4, characterized in that: The scraper has a triangular structure, and the side of the scraper facing the insulator skirt is set with a serrated structure. There are two scrapers, which are respectively set on both sides of the connecting handle and the serrations are staggered.

6. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 3, characterized in that: The clutch device includes a first protrusion disposed at the drive end of the servo motor. A boss is provided on the outer wall of the lead screw and inside the upper housing. A second protrusion is provided on the top of the lead screw, which can move up and down along the lead screw axis. A second spring is provided between the second protrusion and the boss, and the second spring is in a compressed state. The first protrusion and the second protrusion mesh with each other under the action of the second spring, so that the servo motor drives the lead screw to rotate. A second electromagnet is provided inside the boss. When the second electromagnet is energized, it attracts the second protrusion to move along the axis, so that the second protrusion separates from the first protrusion.

7. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 1, characterized in that: A pressure sensor is provided on the underside of the stop near the bottom. The pressure sensor is used to detect the bottoming state of the stop and control the servo motor to rotate in the opposite direction.

8. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 6, characterized in that: It also includes a solar panel, a solar controller, and a battery. The solar panel is electrically connected to the battery through the solar controller. The battery is electrically connected to the servo motor, the first electromagnet, and the second electromagnet through a power management module to provide working power to the servo motor, the first electromagnet, and the second electromagnet.

9. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 1, characterized in that: It also includes a wind-driven component, which is connected to a gear set for using wind power in the area where the power transmission line is located to drive the upper and lower shells to rotate around the mandrel; a first clutch structure is provided between the wind-driven component and the lead screw, and a second clutch structure is provided between the servo motor and the gear set, so that the power transmission between the lead screw and the gear set is cut off when the wind-driven component is running, and the lead screw is controlled to rotate by the servo motor when ice breaking is required.

10. The anti-icing structure for power transmission towers suitable for blizzard weather according to claim 1, characterized in that: It also includes a control module, which is electrically connected to the servo motor, the first electromagnet and the second electromagnet. The control module obtains the rotation angle of the lead screw based on the number of rotations of the servo motor, and calculates the moving distance of the slider in combination with the lead screw lead, so as to determine whether the switching device has moved to the position of the corresponding scraping component, and controls the first electromagnet to switch the scraping component between the separation state, the scraping state and the ice breaking state.

Images