Anti-icing coating spraying equipment for power transmission line

Abstract

The invention relates to the technical field of overhead line spraying, and discloses an anti-icing coating spraying device for a power transmission line. The two roll-over stands are hinged to the lower side of the hanging bracket and surround the split conductor from the two sides; the plurality of rollers are mounted on the inner side of the turnover frame and move along the split conductors; the outer spray pipe is mounted at the rear end of the turnover frame and sprays an anti-icing coating to each split conductor from the outer side; the overturning rod is hinged to the rear end of the hanging bracket; the folding umbrella frame is connected to the tail end of the turnover rod, is provided with an inner spray pipe in a folded state and an unfolded state, is mounted at the tail end of the folding umbrella frame and sprays an anti-icing coating to each split conductor from the inner side when the folding umbrella frame is in the unfolded state; according to the invention, the two overturning frames with a plurality of rollers can move outside the split conductors, the split conductors are sprayed from the outer side through the outer spray pipe, and the foldable umbrella stand which can be folded and overturned can smoothly cross the spacer and spray the split conductors from the inner side, so that comprehensive anti-icing spraying of the split conductors is realized.

Description

Technical Field

[0001] This invention relates to the field of overhead line spraying technology, specifically to a spraying equipment for anti-icing coating on power transmission lines. Background Technology

[0002] Ice and snow accumulation on transmission lines is a common natural disaster in power systems during winter. Ice accumulation can lead to increased conductor load and sag, which can cause serious accidents such as conductor galloping, line breakage, and tower collapse. It can also cause flashover tripping, directly threatening the safe and stable operation of the power grid and causing huge economic losses to the power industry.

[0003] Existing anti-icing and de-icing technologies are divided into two categories: active de-icing and passive anti-icing. Active de-icing technologies include mechanical de-icing, electric current de-icing, and hot air de-icing. While these technologies can achieve de-icing effects, they generally suffer from low efficiency, high energy consumption, and the need for power outages. Furthermore, they are significantly limited by terrain and climate conditions, making them difficult to promote in mountainous and remote areas. Passive anti-icing technology primarily uses anti-icing coatings. Spraying anti-icing coatings onto transmission lines, with their superhydrophobic surface properties, can delay icing at the source and significantly reduce ice adhesion, allowing the ice layer to easily detach under natural conditions, achieving passive anti-icing with zero additional energy consumption. Its construction is convenient, compatible with existing lines, and the thin coating does not increase the line load. It also provides multiple protective effects such as corrosion resistance, anti-flashover, weather resistance, and wear resistance, effectively improving line operation safety and reducing maintenance costs. It is an economical and efficient anti-icing technology solution for transmission lines.

[0004] Anti-icing coatings are typically applied using high-altitude spraying. This is primarily to prevent scratches, abrasions, or even peeling of the coating on conductors and fittings during installation due to strong mechanical operations such as traction, crimping, and hoisting, ensuring the protective effect. Simultaneously, this method is suitable for upgrading the anti-icing capabilities of older lines, facilitating precise touch-ups of aged or damaged coatings without the need for tower dismantling and line laying, significantly reducing power outage and maintenance costs. Furthermore, application can be performed under clean and dry conditions on-site, ensuring film quality. Additionally, anti-icing coatings have a limited shelf life, generally three years, requiring regular high-altitude spraying. The spraying equipment, such as the integrated device for de-icing and anti-icing spraying of cables disclosed in patent CN121017017A and the cable anti-icing coating robot and its spraying method disclosed in patent CN12057171720A, relies on a heavy-duty drone to hoist the spraying equipment onto the power transmission line. The spraying equipment moves along the power transmission line to achieve spraying. However, these devices are only suitable for single conductor structures in low-voltage power transmission lines. On split conductors of high-voltage power transmission lines, the device needs to be placed on the conductor from above, and a large balancing structure space is required on the lower side of the device. In addition, there are a large number of spacers along the split conductors. Existing equipment cannot achieve full anti-icing spraying of split conductors. Summary of the Invention

[0005] The purpose of this invention is to solve at least one of the problems in the prior art mentioned above, and to provide a device for spraying anti-icing coatings for power transmission lines.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A power transmission line anti-icing coating spraying equipment, comprising: Hanger; Two flip-up frames are hinged to the underside of the hanger and surround the split conductor from both sides; Several rollers are installed inside the tilting frame and move along the split guide wire; An external spray nozzle is installed at the rear end of the tilting frame and sprays anti-icing coating onto each split wire from the outside. A flip-up rod is hinged to the rear end of the hanger; A folding umbrella frame, connected to the end of the flip rod, has a folded state and an unfolded state; An inner spray nozzle is installed at the end of the folding umbrella frame and sprays anti-icing coating onto each split guide wire from the inside when the folding umbrella frame is in the unfolded state; when the folding umbrella frame is in the folded state, the flipping rod flips and drives the folding umbrella frame to flip to the outside of the split guide wire.

[0007] Furthermore, an inverted V-shaped lifting rod is connected to the upper side of the hanger, and a first electric cylinder that drives the tilting frame to tilt is hinged between the hanger and the outer side of the middle part of the tilting frame.

[0008] Furthermore, the roller includes several main rollers, which are located on the upper side and the horizontal side of the split conductor, respectively. A swing frame is connected between the main rollers and the flipping frame. A motor that drives the main rollers to rotate is provided on the swing frame. A tension spring that makes the main rollers fit against the split conductor is connected between the swing frame and the flipping frame.

[0009] Furthermore, the roller includes several auxiliary rollers, which are located on the upper side of the split guide wire, and an elastic telescopic rod is connected between the auxiliary rollers and the flipping frame.

[0010] Furthermore, the roller includes a central portion and two bowl-shaped portions, the central portion being connected between the outer sides of the center of the bottom of the two bowl-shaped portions.

[0011] Furthermore, a paint tank is provided at the lower part of the tilting frame, and an output pump is provided at the lower rear end of the paint tank. The output end of the output pump is connected to an arc-shaped pipe installed at the rear end of the tilting frame. The external spray pipe is connected to the inside of the arc-shaped pipe, and the internal spray pipe is connected to the arc-shaped pipe through a flexible hose.

[0012] Furthermore, the lower end of the hanger is provided with a support shaft for supporting the flipping frame to flip, and a support is provided at the rear end of the support shaft. The flipping rod is hinged to the support, and a second electric cylinder that drives the flipping rod to flip is hinged between the flipping rod and the support.

[0013] Furthermore, the folding umbrella frame includes a fixed disc connected to a flipping rod, the fixed disc is hinged with a plurality of circumferentially distributed folding rods, the inner nozzle is connected to the end of the folding rods, a third electric cylinder is installed at the center of the fixed disc, a movable disc is connected to the rear end of the third electric cylinder, and a connecting rod is hinged between the movable disc and the folding rods.

[0014] Furthermore, each of the flipping frames is connected to a protective cover at its rear end. The protective cover includes an arc-shaped portion surrounding the outside of the split wire and a hopper portion connected to the lower end of the arc-shaped portion. The hopper portions of the protective covers connected to the two flipping frames are in contact with each other.

[0015] Furthermore, the lower wall of the hopper is provided with a through hole, and a flexible layer is embedded in the through hole, the unfolded area of ​​the flexible layer being larger than the area of ​​the through hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention allows two rotating frames with several rollers to move outside the split conductors, and sprays each split conductor from the outside through an external spray nozzle. The foldable and rotating umbrella frame can smoothly pass over the spacer bar and spray each split conductor from the inside, achieving comprehensive anti-icing spraying of the split conductors. This invention employs a structure in which a double-flip frame surrounds multiple split wires, which facilitates the installation of spraying equipment using a drone and allows for simultaneous spraying of all split wires on the inner side, resulting in high multi-wire spraying efficiency. This invention employs a multi-roller structure with elastic support. The rollers move along multiple split guide wires, allowing the entire spraying equipment to move along the outer side of the split guide wires. The rollers with a middle section and a bowl-shaped section can avoid separation from the guide wires when passing through spacers, thus enabling smooth obstacle crossing. This invention uses a foldable umbrella frame that can be flipped and folded to drive the inner nozzle to fold and flip. When it is necessary to pass through the spacer bar, the umbrella frame can be folded to reduce its volume and then flipped upward to move out from the inside of the split conductor, so that the equipment can pass through the spacer bar smoothly. The inner and outer nozzles are used to achieve all-round anti-icing spraying of the split conductor without dead angles. This invention employs a protective cover to reduce paint loss and effectively recover some of the paint; the hopper section has a flexible layer to prevent the paint recovered inside from being lost when the tilting frame detaches from the split wire. Attached Figure Description

[0017] Figure 1 This is a schematic diagram illustrating the direction of movement according to the present invention.

[0018] Figure 2 This is a planar schematic diagram of the rear end face of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 4 This is a schematic diagram showing the state of the paint box and protective cover after removal according to the present invention.

[0021] Figure 5 This is a schematic diagram of the main roller connection structure of the present invention.

[0022] Figure 6 This is a schematic diagram of the paint tank and the outer spraying structure of the present invention.

[0023] Figure 7 This is a schematic diagram of the folding umbrella frame connection structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the protective cover structure of the present invention.

[0025] In the diagram: 1. Hanger; 2. Hanging rod; 3. Tilting frame; 4. First electric cylinder; 5. Main roller; 6. Swing frame; 7. Motor; 8. Tension spring; 9. Secondary roller; 10. Elastic telescopic rod; 11. Paint tank; 12. Output pump; 13. Arc-shaped pipe; 14. External spray pipe; 15. Support shaft; 16. Support; 17. Tilting rod; 18. Second electric cylinder; 19. Fixed disc; 20. Folding rod; 21. Moving disc; 22. Third electric cylinder; 23. Connecting rod; 24. Internal spray pipe; 25. Protective cover; 26. Flexible layer; 27. Rubber pad; 28. Battery pack; 501. Middle section; 502. Bowl-shaped section. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Specific embodiments of the anti-icing coating spraying equipment for power transmission lines provided by the present invention: Please refer to the attached document. Figures 1-8 The equipment for spraying anti-icing coating on power transmission lines includes a hanger 1, two tilting frames 3, several rollers, an outer spray pipe 14, a tilting rod 17, a folding umbrella frame, and an inner spray pipe 24.

[0028] Two flipping frames 3 are symmetrically hinged to the lower side of the hanger 1 and surround the split conductor from both sides. The lower end of the hanger 1 is provided with a support shaft 15 to support the flipping frames 3. The flipping frames 3 are arc-shaped frame structures, and the arc-shaped openings of the two flipping frames 3 are opposite each other. When the two flipping frames 3 surround the split conductor, there is a gap between the lower edges of the two flipping frames 3. The flipping frames 3 include several parallel arc-shaped plates, and several axial strips parallel to the support shaft 15 are connected between the arc-shaped plates. The upper ends of the arc-shaped plates are rotatably connected to the support shaft 15.

[0029] The upper side of the hanger 1 is connected to an inverted V-shaped boom 2. The boom 2 is used to attach to the load-bearing drone when loading and unloading the spraying equipment. The load-bearing drone can lift and hoist the spraying equipment. It can be understood that several cameras can be installed on the lower side of the hanger 1 to facilitate the accurate placement of the spraying equipment on the split guide. There are four first electric cylinders 4 that drive the flipping frame 3 to flip between the hanger 1 and the outer side of the middle part of the flipping frame 3. Each flipping frame 3 is connected to two first electric cylinders 4. The first electric cylinders 4 drive the flipping frame 3 to flip outside the split guide. During loading and unloading, the flipping frame 3 needs to be unfolded to cooperate with the split guide from the top.

[0030] This embodiment uses a six-split conductor as an example for detailed explanation. It is understood that the spraying equipment can be appropriately adjusted for other common split conductors, such as four-split and eight-split conductors, to achieve comprehensive anti-icing spraying for different types of split conductors. This embodiment describes the forward and backward movement of the spraying equipment in terms of its direction of travel. Figure 1 It indicates the direction of travel for the spraying equipment.

[0031] Several rollers are installed inside the flipping frame 3 and move along the split conductor. In this embodiment, the rollers include several main rollers 5 and several auxiliary rollers 9. The main rollers 5 are driving rollers, and the auxiliary rollers 9 are driven rollers. Each roller includes a central part 501 and two bowl-shaped parts 502. The central part 501 is connected between the outer sides of the center of the bottom of the two bowl-shaped parts 502. The bottom of the bowl-shaped part 502 is a circular plate structure, and the bowl body is a conical ring structure extending outward from the bottom. The outer diameter of the bowl opening is larger than the outer diameter of the bowl bottom, and the outer diameter of the central part 501 is smaller than the diameter of the bowl bottom, and their centers correspond. The two bowl-shaped parts 502 are placed on both sides of the conductor to prevent the roller from separating from the conductor. The distance between the outer ring edges of the two bowl-shaped parts 502 is greater than the width of the spacer where the conductor is clamped. When the roller passes the spacer where the conductor is clamped, the roller can avoid detaching from the conductor and smoothly pass the spacer.

[0032] The main rollers 5 are located on the upper side and the horizontal side of the split conductors, respectively. In this embodiment, there are eight main rollers 5. For a six-split conductor, there are two main rollers 5 on the upper side of each of the two upper conductors, and two main rollers 5 on the horizontal outer side of each of the two lower conductors on both sides.

[0033] A swing frame 6 connects the main roller 5 and the tilting frame 3. The swing frame 6 is equipped with a motor 7 that drives the main roller 5 to rotate. The swing frame 6 supports the main roller 5 and the motor 7. A tension spring 8 connects the swing frame 6 and the tilting frame 3 to ensure the main roller 5 is in contact with the split wire. It is understood that the stroke of the tension spring 8 is less than the difference between the maximum radius of the bowl-shaped part 502 and the radius of the middle part 501, so that the roller can smoothly engage and disengage with the wire when the tilting frame 3 tilts. Using the swing frame 6 and tension spring 8 to support the main roller 5 ensures that the main roller 5 is always in contact with the wire; furthermore, when passing over the spacer bar, the position of the main roller 5 can be adaptively adjusted, reducing the overall misalignment and swaying of the spraying equipment.

[0034] The weight of the spraying equipment is mainly concentrated on the two upper conductors of the six-split conductor. To prevent the tension springs 8 of the four upper main rollers 5 from being overstretched, this embodiment sets auxiliary rollers 9 to share the weight of the spraying equipment. At least two auxiliary rollers 9 are used; preferably, four or six are provided to ensure stable support for the spraying equipment. The auxiliary rollers 9 are located above the two upper split conductors. An elastic telescopic rod 10 connects the auxiliary rollers 9 to the tilting frame 3. The elastic telescopic rod 10 includes a telescopic rod, and a wheel seat for mounting the auxiliary rollers 9 is provided at the lower end of the telescopic rod. A compression spring connects the fixed part of the telescopic rod and the wheel seat, and the compression spring is sleeved on the outside of the telescopic part of the telescopic rod. The auxiliary rollers 9 passively rotate along the conductor, mainly supporting the spraying equipment. Simultaneously, the auxiliary rollers 9 use elastic support to reduce the difficulty of crossing the spacer bars. A rechargeable battery pack 28 is provided on the upper part of the tilting frame 3, which supplies power to the electrical components.

[0035] An external spray pipe 14 is installed at the rear end of the tilting frame 3 and sprays anti-icing coating onto each split wire from the outside. In this embodiment, there are six external spray pipes 14, each corresponding to one of the six wires. A coating tank 11 is provided at the lower part of the tilting frame 3. An output pump 12 is provided at the lower rear end of the coating tank 11. The output end of the output pump 12 is connected to an arc-shaped pipe 13 installed at the rear end of the tilting frame 3. The arc-shaped pipe 13 is located behind the arc-shaped plate at the rear end of the tilting frame 3. The external spray pipe 14 is connected to the inside of the arc-shaped pipe 13.

[0036] There are two paint tanks 11, two output pumps 12, and two arc-shaped pipes 13, each corresponding to one of the two tilting frames 3. The paint tank 11 has an inlet and a cap on its upper side for adding anti-icing paint. The lower end of the paint tank 11 has a support surface, which rests on the ground when the tilting frame 3 is unfolded.

[0037] The flipping rod 17 is hinged to the rear end of the hanger 1. Specifically, the rear end of the support shaft 15 is provided with a support 16. The support 16 has an inverted U-shaped cross section. The flipping rod 17 is hinged to the support 16. A second electric cylinder 18 that drives the flipping rod 17 to flip is hinged between the flipping rod 17 and the support 16. The second electric cylinder 18 causes the flipping rod 17 to flip between a vertical state and a horizontal state. In the horizontal state, the flipping rod 17 is parallel and corresponds to the support 16. In the vertical state, the end of the flipping rod 17, i.e. the lower end, extends to the inner center of the six-split conductor.

[0038] The folding umbrella frame is connected to the end of the flip rod 17 and has a folded state and an unfolded state. The folding umbrella frame includes a fixed disc 19 connected to the flip rod 17. The fixed disc 19 is hinged to several circumferentially distributed folding rods 20. The inner nozzle 24 is connected to the end of the folding rods 20. A third electric cylinder 22 is installed at the center of the fixed disc 19. The telescopic end of the third electric cylinder 22, i.e. its rear end, is connected to a movable disc 21. The movable disc 21 and the folding rods 20 are both hinged to a connecting rod 23. The telescopic movement of the third electric cylinder 22 realizes the axial movement of the movable disc 21. The movable disc 21, through the connecting rod 23, makes the folding rods 20 change from the unfolded state to the folded state. In the folded state, the folding rods 20 are parallel to the guide wire, thus reducing the volume.

[0039] When the folding umbrella frame is folded, its width is less than the distance between the two upper split guide wires. The second electric cylinder 18 actuates, causing the flipping rod 17 to flip to a horizontal position. During this process, the folding umbrella frame passes through the two upper split guide wires to the outside of the split guide wires, i.e., the upper side. In this way, the spraying equipment continues to move forward, and the flipping rod 17 and the folding umbrella frame will not collide with the spacer bar, allowing the spraying equipment to pass smoothly through the spacer bar. When the spraying equipment encounters the spacer bar, the folding umbrella frame folds, and then the flipping rod 17 flips from a vertical position to a horizontal position. It can be understood that in actual operation, the guide wires are curved, and the aforementioned vertical position of the flipping rod 17 is not vertical, and the horizontal position is not horizontal.

[0040] The inner nozzle 24 is installed at the end of the folding umbrella frame and sprays anti-icing coating from the inside to each split guide when the folding umbrella frame is in the unfolded state. When the folding umbrella frame is in the unfolded state, the inner nozzle 24 corresponds to each split guide and is close to the split guide, which facilitates accurate spraying of anti-icing coating from the inside.

[0041] The inner nozzle 24 is connected to the end of the folding rod 20. There are six folding rods 20, six connecting rods 23, and six inner nozzles 24, each corresponding to a split wire. The inner nozzles 24 are connected to the arc-shaped tube 13 through a flexible tube. Three of the six inner nozzles 24 are grouped into two groups. The two groups of inner nozzles 24 are connected to two arc-shaped tubes 13 respectively. The paint in the two paint tanks 11 is used. This design allows the paint in the two paint tanks 11 to be reduced equally, ensuring the balance of the spraying equipment.

[0042] Each of the two rotating frames 3 has a protective cover 25 connected to its rear end. The protective cover 25 includes an arc-shaped portion surrounding the outside of the split conductor and a hopper portion connected to the lower end of the arc-shaped portion. The arc-shaped portion is a plate-like structure, connected to the rear edge of the arc-shaped plate at the rear end of the rotating frame 3. An arc-shaped tube 13 is located inside the front end of the arc-shaped portion, and the output pipe of the output pump 12 passes through the arc-shaped portion. There are two protective covers 25. The hopper portions of the two protective covers 25 are located below the spraying structure and receive the paint not covered on the outside of the conductor. When the two rotating frames 3 surround the split conductor, the edges of the hopper portions of the protective covers 25 connected to the two rotating frames 3 contact each other. Rubber pads 27 are provided on the contacting sides of the hopper portions, which seal the gaps and prevent the two hopper portions from colliding.

[0043] Most of the sprayed paint is applied to the outside of the conductor, while some is blocked by the arc-shaped part of the protective cover 25 and eventually falls inside the hopper, reducing paint waste. The lower wall of the hopper has a through hole, in which a flexible layer 26 is embedded. The unfolded area of ​​the flexible layer 26 is at least twice the area of ​​the through hole. After the paint is stored in the hopper, the flexible layer 26 drops to store the recovered paint. It can be understood that the flexible layer 26 storing the paint is bag-shaped, with the bag opening corresponding to and connected to the through hole of the hopper. In this way, when the two tilting frames 3 are unfolded relatively far apart, the recovered paint is inside the bag-shaped flexible layer 26 and will not flow out from the inside of the hopper, allowing the recovered paint to be transported back to the ground.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for spraying anti-icing coating on power transmission lines, characterized in that, include: Hanger (1); Two flip frames (3) are hinged to the underside of the hanger (1) and surround the split conductor from both sides; Several rollers are installed inside the tilting frame (3) and move along the split guide wire; An external nozzle (14) is installed at the rear end of the flipping frame (3) and sprays anti-icing coating onto each split wire from the outside. A flip rod (17) is hinged to the rear end of the hanger (1); A folding umbrella frame is attached to the end of the flip rod (17) and has a folded state and an unfolded state; An inner nozzle (24) is installed at the end of the folding umbrella frame and sprays anti-icing coating from the inside to each split guide when the folding umbrella frame is in the unfolded state. When the folding umbrella frame is in the folded state, the flipping rod (17) flips and causes the folding umbrella frame to flip to the outside of the split conductor.

2. The transmission line anti-icing coating spraying equipment according to claim 1, characterized in that, The upper side of the hanger (1) is connected to an inverted V-shaped hanger rod (2), and the hanger (1) and the outer side of the middle part of the tilting frame (3) are hinged to a first electric cylinder (4) that drives the tilting frame (3) to tilt.

3. The transmission line anti-icing coating spraying equipment according to claim 1, characterized in that, The roller includes several main rollers (5), which are located on the upper side and the horizontal side of the split wire respectively. A swing frame (6) is connected between the main rollers (5) and the flipping frame (3). A motor (7) is provided on the swing frame (6) to drive the main rollers (5) to rotate. A tension spring (8) is connected between the swing frame (6) and the flipping frame (3) to make the main rollers (5) fit with the split wire.

4. The transmission line anti-icing coating spraying equipment according to claim 3, characterized in that, The roller includes several auxiliary rollers (9), which are located on the upper side of the split guide wire. An elastic telescopic rod (10) is connected between the auxiliary rollers (9) and the flipping frame (3).

5. The transmission line anti-icing coating spraying equipment according to claim 1, 3, or 4, characterized in that, The roller includes a middle part (501) and two bowl-shaped parts (502), the middle part (501) being connected between the outer sides of the center of the bottom of the two bowl-shaped parts (502).

6. The transmission line anti-icing coating spraying equipment according to claim 1, characterized in that, The lower part of the flipping frame (3) is provided with a paint tank (11), and the lower part of the rear end of the paint tank (11) is provided with an output pump (12). The output end of the output pump (12) is connected to an arc-shaped pipe (13) installed at the rear end of the flipping frame (3). The external spray pipe (14) is connected to the inside of the arc-shaped pipe (13), and the internal spray pipe (24) is connected to the arc-shaped pipe (13) through a hose.

7. The transmission line anti-icing coating spraying equipment according to claim 1, characterized in that, The lower end of the hanger (1) is provided with a support shaft (15) for supporting the flipping frame (3) to flip. The rear end of the support shaft (15) is provided with a support (16). The flipping rod (17) is hinged to the support (16). A second electric cylinder (18) is hinged between the flipping rod (17) and the support (16) to drive the flipping rod (17) to flip.

8. The transmission line anti-icing coating spraying equipment according to claim 1 or 7, characterized in that, The folding umbrella frame includes a fixed disc (19) connected to a flipping rod (17). The fixed disc (19) is hinged to a plurality of folding rods (20) evenly distributed around the circumference. The inner nozzle (24) is connected to the end of the folding rods (20). A third electric cylinder (22) is installed at the center of the fixed disc (19). A movable disc (21) is connected to the rear end of the third electric cylinder (22). A connecting rod (23) is hinged between the movable disc (21) and the folding rods (20).

9. The transmission line anti-icing coating spraying equipment according to claim 1, characterized in that, The rear end of each of the flipping frames (3) is connected to a protective cover (25). The protective cover (25) includes an arc-shaped part surrounding the outside of the split wire and a hopper part connected to the lower end of the arc-shaped part. The hopper parts of the protective covers (25) connected to the two flipping frames (3) are in contact with each other.

10. The transmission line anti-icing coating spraying equipment according to claim 9, characterized in that, The lower wall of the hopper is provided with a through hole, and a flexible layer (26) is embedded in the through hole. The unfolded area of ​​the flexible layer (26) is larger than the area of ​​the through hole.

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