A high-voltage electric porcelain insulator of anti-pollution flashover type

Abstract

The application discloses a kind of anti-pollution flash type high-voltage electric porcelain insulator, it is related to the technical field of insulator, including insulator body, the two ends of insulator body are respectively fixedly connected with terminal, and terminal periphery is rotatably connected with rotating ring by annular bearing, and one end of rotating ring is fixedly connected with extension rod, and the end of two extension rods is connected by connecting plate, and one side of connecting plate towards insulator body is fixedly provided with electric sliding table, and the movable part of electric sliding table is fixedly connected with telescopic component, and the movable part of telescopic component is fixedly connected with cleaning brush, and the working surface of cleaning brush is uniformly provided with cleaning brush hair, and one side of one rotating ring towards insulator body is fixedly connected with internal gear ring, and one terminal is fixedly connected with rotating drive assembly for driving internal gear ring outside one terminal.The application can improve the ability of anti-pollution flash.

Description

Technical Field

[0001] This invention relates to the field of sorting robot technology, and in particular to a high-voltage porcelain insulator with anti-flashover protection. Background Technology

[0002] High-voltage porcelain insulators are key insulating components widely used in power transmission and transformation systems, primarily serving a dual function of mechanical support and electrical insulation. They are typically made of porcelain material through high-temperature sintering, possessing excellent mechanical strength and electrical insulation properties. They are widely used in overhead transmission lines and substation equipment to ensure the safe and stable operation of the power system.

[0003] In actual operating environments, high-voltage porcelain insulators are exposed to the atmosphere for extended periods, and their surfaces easily accumulate pollutants such as dust, salt spray, and industrial contaminants. When the insulator surface becomes damp, soluble substances in the contaminant layer dissolve to form a conductive film, leading to an increase in leakage current and potentially triggering surface flashover accidents, also known as pollution flashover. Once a pollution flashover accident occurs, it often causes large-scale power outages, seriously threatening the safety of the power grid. Therefore, high-voltage porcelain insulators must possess excellent anti-pollution flashover capabilities.

[0004] However, existing high-voltage porcelain insulators mostly employ a smooth surface structure with low surface energy, resulting in strong adhesion of pollutant particles. Furthermore, they lack effective hydrophobic or self-cleaning mechanisms, making it easy for pollutants to form continuous conductive paths under humid conditions, thus limiting their anti-flashover performance. With the expansion of power grid coverage and increasingly complex operating environments, the anti-flashover capabilities of existing products are no longer sufficient to meet higher safety operation requirements, and there is still significant room for improvement. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide a high-voltage porcelain insulator with anti-pollution flashover capability.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-voltage porcelain insulator designed to prevent flashover includes an insulator body. Terminals are fixedly connected to both ends of the insulator body. A rotating ring is rotatably connected to the periphery of each terminal via a ring bearing. An extension rod is fixedly connected to one end of each rotating ring. Two extension rods are connected to their ends via a connecting plate. An electric slide is fixedly mounted on the side of the connecting plate facing the insulator body. A telescopic assembly is fixedly connected to the movable part of the electric slide. A cleaning brush is fixedly connected to the movable part of the telescopic assembly. Cleaning bristles are evenly distributed on the working surface of the cleaning brush. An internal gear ring is fixedly connected to the side of one of the rotating rings facing the insulator body. A rotation drive assembly for driving the internal gear ring is fixedly connected to the outside of one of the terminals.

[0008] Preferably, the telescopic component is an electric cylinder.

[0009] Preferably, the rotation drive assembly includes a drive motor capable of forward and reverse rotation, and the output shaft of the drive motor is fixedly connected to a drive gear adapted to the internal gear ring.

[0010] Preferably, the drive motor is a stepper motor, and both the telescopic component and the electric slide are driven by servo motors.

[0011] Preferably, the cleaning brush bristles include an elastic plastic inner core, and the elastic plastic inner core is wrapped with a flexible silicone layer.

[0012] Preferably, both the extension rod and the connecting plate are uniformly fixed with reinforcing ribs on their outer surfaces, and both the extension rod and the connecting plate are made of 304 stainless steel.

[0013] The present invention has the following beneficial effects:

[0014] I. Effective Removal of Surface Contamination: This solution utilizes a combination of a rotating ring, extension rod, connecting plate, electric slide, telescopic assembly, and cleaning brush to create a movable mechanical cleaning system on the insulator surface. The cleaning brush bristles directly contact the insulator surface, physically removing dust, salt spray, industrial grime, and other contaminants, fundamentally reducing the conditions for conductive film formation. Compared to traditional passive anti-contamination methods for smooth surfaces, this solution employs an active cleaning approach, significantly reducing the probability of flashover.

[0015] II. Rotary Coverage for Comprehensive Cleaning: The rotating ring, connected to the terminal block via a ring bearing, can rotate around the insulator body. Combined with the gear transmission structure of the drive motor and internal gear ring, the cleaning brush can cover the entire outer surface of the insulator, leaving no blind spots. This full-circumferential sweeping cleaning method solves the problem of traditional fixed anti-fouling measures only covering localized areas, significantly improving cleaning efficiency and coverage uniformity.

[0016] III. Precise Control Ensures Cleaning Quality: The drive motor is a stepper motor, while the electric slide and telescopic components are driven by servo motors. These three components work together to achieve precise control of the cleaning brush position. The stepper motor ensures the accuracy of the rotation angle, while the servo motor ensures the positioning accuracy of the telescopic and sliding movements. This allows the cleaning brush to adaptively adjust the cleaning force and path according to the degree of dirt on the insulator surface, avoiding excessive wear on the insulator surface while ensuring that stubborn dirt is thoroughly removed.

[0017] IV. Flexible bristles protect the insulator body; the cleaning bristles employ a double-layer structure with an elastic plastic inner core and a flexible silicone layer. The flexible silicone layer has excellent elasticity and weather resistance, removing dirt without scratching the porcelain surface. This is crucial because micro-cracks on the insulator surface can become the starting point for dirt accumulation and flashover. The flexible bristles achieve a balance between efficient cleaning and protecting the insulator body.

[0018] V. Stainless steel structure ensures long-term reliable operation; the extension rod and connecting plate are both made of 304 stainless steel, with reinforcing ribs on the outer surface. 304 stainless steel has excellent corrosion resistance and can be used for a long time in harsh outdoor environments such as salt spray and humidity without rusting. The reinforcing ribs improve structural rigidity, prevent deformation or vibration of the long lever arm during operation, and ensure stable operation of the entire cleaning mechanism throughout its life cycle.

[0019] VI. The combined advantages of active anti-pollution measures over passive ones: Traditional insulators rely on passive methods such as coating with anti-flashover paint or increasing creepage distance, the effectiveness of which diminishes over time and maintenance costs are high. This solution integrates a mechanical cleaning mechanism into the insulator body, forming a "self-cleaning" system. When dirt accumulates to a certain level, it is automatically or periodically removed, significantly extending the maintenance-free period of the insulator. The combination of gear transmission and electric actuators allows the entire system to operate without external manual intervention, making it particularly suitable for the unmanned operation and maintenance needs of transmission lines in remote areas. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front view of an embodiment of the present invention.

[0022] Figure 2 This is a partial cross-sectional view of an embodiment of the present invention.

[0023] In the diagram: 1. Insulator body; 101. Terminal block; 201. Ring bearing; 202. Rotating ring; 203. Extension rod; 204. Connecting plate; 301. Electric slide; 302. Telescopic assembly; 303. Cleaning brush; 304. Cleaning bristles; 401. Internal gear ring; 421. Drive motor; 422. Drive gear. Detailed Implementation

[0024] 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.

[0025] like Figures 1 to 2 As shown, a high-voltage porcelain insulator with anti-flashover type includes an insulator body 1. Terminals 101 are fixedly connected to both ends of the insulator body 1. A rotating ring 202 is rotatably connected to the periphery of the terminal 101 via an annular bearing 201. An extension rod 203 is fixedly connected to one end of the rotating ring 202. The ends of the two extension rods 203 are connected to a connecting plate 204. An electric slide 301 is fixedly installed on the side of the connecting plate 204 facing the insulator body 1. A telescopic component 302 is fixedly connected to the movable part of the electric slide 301. A cleaning brush 303 is fixedly connected to the movable part of the telescopic component 302. The working surface of the cleaning brush 303 is evenly provided with cleaning brush bristles. An internal gear ring 401 is fixedly connected to the side of one of the rotating rings 202 facing the insulator body 1. A rotation drive component for driving the internal gear ring 401 is fixedly connected to the outside of one of the terminal 101.

[0026] like Figures 1 to 2 As shown, the insulator body 1 is the core insulating component of the entire device, made of porcelain material sintered at high temperature, and performs the dual functions of mechanical support and electrical insulation. Terminals 101 are fixedly connected to both ends for electrical connection with the transmission line. The surface of the insulator body 1 is the working surface that easily accumulates dust, salt spray, and industrial contaminants, and is also the primary target for cleaning by the cleaning brush 303 in this design. Each end of the insulator body 1 has a terminal 101 as an electrical connection interface. The rotating ring 202 is rotatably connected to the periphery of the terminal 101 via an annular bearing 201. The annular bearing 201 allows the rotating ring 202 to rotate freely around the axis of the insulator body 1, while simultaneously bearing radial and axial loads, ensuring that the rotating ring 202 will not loosen or fall off due to vibration or wind during long-term outdoor operation. This structure provides the rotational basis for the subsequent circumferential sweeping of the cleaning brush 303.

[0027] A rotating ring 202 is fixedly connected to an annular bearing 201 and rotates around the insulator body 1 together with the bearing. An extension rod 203 extends from one end of the rotating ring 202. The extension rod 203 pulls the cleaning mechanism a certain distance away from the insulator surface, allowing the cleaning brush 303 to approach the outer wall of the insulator via the connecting plate 204 and the electric slide 301. The extension rod 203 is made of 304 stainless steel and has reinforcing ribs on its outer surface to prevent bending deformation under wind force and its own weight, maintaining the relative positional stability between the cleaning mechanism and the insulator. The ends of the two extension rods 203 are connected by a connecting plate 204, on the side of the connecting plate 204 facing the insulator body 1. The electric slide 301 acts as a linear guide rail that can reciprocate along the direction of the connecting plate 204, and its movable part can perform precise linear motion on the connecting plate 204. The purpose of this design is to allow the cleaning brush 303 to move back and forth along the axial direction of the insulator, in conjunction with the circumferential motion of the rotating ring 202, to achieve grid-like coverage cleaning of the entire outer surface of the insulator, rather than only cleaning a fixed annular area.

[0028] The movable part of the electric slide table 301 is fixedly connected to the telescopic assembly 302, and the movable part of the telescopic assembly 302 is further fixedly connected to the cleaning brush 303. The telescopic assembly 302 is preferably an electric cylinder, whose function is to control the radial extension and retraction of the cleaning brush 303, allowing the bristles of the cleaning brush 303 to press against or move away from the insulator surface. When cleaning is required, the telescopic assembly 302 extends, pushing the cleaning brush 303 towards the insulator surface, where the bristles contact and sweep away dirt. When cleaning is not required, the telescopic assembly 302 retracts, moving the cleaning brush 303 away from the insulator surface, avoiding unnecessary friction and wear on the insulator when not cleaning. The working surface of the cleaning brush 303 has evenly distributed bristles, which adopt a double-layer structure with an elastic plastic inner core and an outer flexible silicone layer, effectively scraping away stubborn dirt without scratching the porcelain surface.

[0029] One of the rotating rings 202 has an internal gear ring 401 fixedly connected to its side facing the insulator body 1. A corresponding rotation drive assembly is mounted outside one of the terminals 101, including a reversible drive motor 421 and a drive gear 422 adapted to the internal gear ring 401. The drive motor 421 is preferably a stepper motor, with the drive gear 422 on its output shaft meshing with the internal gear ring 401. When the drive motor 421 rotates forward or backward, it drives the rotating ring 202 to perform precise circular motion around the insulator body 1 via gear transmission. The stepper motor is characterized by a fixed and controllable rotation angle per step, thus allowing the cleaning brush 303 to be precisely positioned in the circumferential direction, preventing missed or repeated cleaning of certain areas.

[0030] The design mentions that the ends of the two extension rods 203 are connected by a connecting plate 204, but it doesn't specify whether each of the two rotating rings 202 is connected to an extension rod 203, or whether both extension rods 203 extend from the same rotating ring 202. Based on structural rationality, the more likely arrangement is that each of the two rotating rings 202 is connected to an extension rod 203, and the two extension rods 203 meet at the middle of the insulator via the connecting plate 204. This symmetrical arrangement allows the center of gravity of the cleaning mechanism to be closer to the insulator axis, reducing the eccentric torque during rotation. Furthermore, the electric slide 301 is positioned on the side of the connecting plate 204 facing the insulator body 1, indicating that the movement direction of the electric slide 301 is roughly parallel to the insulator axis. Combined with the circular motion of the rotating rings 202, the combined motion of the cleaning brush 303 approximates a spiral trajectory, effectively covering the entire outer surface of the insulator.

[0031] like Figures 1 to 2 As shown, the telescopic component 302 is an electric cylinder. The rotation drive component includes a forward and reverse reversible drive motor 421, and the output shaft of the drive motor 421 is fixedly connected to a drive gear 422 adapted to the internal gear ring 401. The telescopic component 302 adopts an electric cylinder structure. An electric cylinder is an electric actuator that directly converts electrical energy into linear thrust, which has more precise stroke control and greater output thrust compared to a pneumatic cylinder. In this solution, the electric cylinder is responsible for controlling the radial telescopic movement of the cleaning brush 303, so that the bristles of the cleaning brush 303 can stably press against the insulator surface or withdraw from the cleaning position. The thrust of the electric cylinder can be precisely adjusted to avoid excessive pressure on the porcelain surface caused by excessive thrust, resulting in micro-cracks, and also to avoid insufficient thrust leading to incomplete cleaning. The electric cylinder also has the characteristics of fast response speed and high positioning accuracy, and can work with the control system to realize real-time adjustment of the pressure between the cleaning brush 303 and the insulator surface.

[0032] The rotation drive assembly consists of a reversible drive motor 421 and a drive gear 422 adapted to the internal gear ring 401. When the drive motor 421 rotates forward or backward, the drive gear 422 on its output shaft meshes with the internal gear ring 401, driving the rotating ring 202 to rotate around the insulator body 1 in a circular motion. The reversible design allows the cleaning brush 303 to sweep across the insulator surface in both clockwise and counterclockwise directions. When encountering stubborn dirt in a certain direction, it can move in the opposite direction for secondary cleaning, improving the thoroughness of cleaning. Compared with friction transmission, the meshing transmission of the drive gear 422 and the internal gear ring 401 has higher transmission efficiency and more accurate transmission ratio, ensuring that the angle of rotation of the rotating ring 202 corresponds strictly to the motor output, without slippage or missed steps.

[0033] like Figures 1 to 2As shown, the drive motor 421 is a stepper motor, while the telescopic component 302 and the electric slide 301 are both driven by servo motors. The core advantage of the stepper motor 421 is that it rotates by a fixed angle with each pulse signal received, achieving precise open-loop control without an encoder. This allows the circumferential position of the rotating ring 202 to be precisely set to any angle, ensuring the cleaning path of the cleaning brush 303 on the outer surface of the insulator is strictly executed according to a preset program, without missing any areas. The telescopic component 302 and the electric slide 301 are driven by servo motors equipped with position feedback encoders, which can detect the actual position in real time and compare it with the target position, automatically correcting deviations. When the electric slide 301 moves along the insulator's axial direction, the servo motor ensures its positioning accuracy; when the telescopic component 302 is radially pressed, the servo motor ensures its constant pressure. Each of the three motors performs its specific function: the stepper motor is responsible for precise indexing in the circumferential direction, and the two servo motors are responsible for precise positioning in the axial and radial directions, respectively. Their combined operation allows the movement trajectory of the cleaning brush 303 to be precisely programmed and controlled.

[0034] like Figures 1 to 2 As shown, the cleaning brush 303 bristles consist of an elastic plastic inner core, wrapped with a flexible silicone layer. The cleaning brush 303 bristles employ a double-layer composite structure with an elastic plastic inner core and a flexible silicone layer. The elastic plastic inner core provides overall elastic recovery force to the bristles, allowing them to automatically bend and conform to the curved surface after contacting the insulator, ensuring uniform contact between the bristles and the outer wall of the insulator. The flexible silicone layer, with its hydrophobic and low surface energy properties, does not easily attract dirt particles during cleaning. Simultaneously, the silicone's moderate coefficient of friction effectively removes dissolved conductive film without excessive friction that could damage the porcelain enamel surface. This double-layer structure also prevents the cleaning brush 303 from accumulating dirt after each cleaning, reducing the possibility of the brush itself becoming a new source of contamination.

[0035] like Figures 1 to 2As shown, both the extension rod 203 and the connecting plate 204 have reinforcing ribs uniformly fixed to their outer surfaces, and both are made of 304 stainless steel. The extension rod 203 and the connecting plate 204 serve as intermediate transmission arms connecting the rotating ring 202 and the cleaning brush 303, bearing the weight, wind force, and inertial loads from the operation of the cleaning mechanism outdoors over long periods. 304 stainless steel has excellent atmospheric corrosion resistance, is not easily corroded in salt spray and humid environments, ensuring that the mechanical properties of the structure do not degrade throughout its lifespan. The uniformly arranged reinforcing ribs on the outer surfaces are equivalent to adding longitudinal and transverse ribs to the surface of the rods, significantly increasing the moment of inertia of the section. This makes the extension rod 203 and the connecting plate 204 less prone to bending deformation under transverse wind force and less prone to resonance during rapid start-up and shutdown of the cleaning mechanism. The uniform arrangement of the reinforcing ribs also makes the load distribution more even across the entire structure, avoiding fatigue fracture caused by localized stress concentration.

[0036] The design specifies that the drive motor 421 is a stepper motor, while the telescopic component 302 and the electric slide 301 are driven by servo motors. There is a point to note regarding the control logic here. Stepper motors are suitable for open-loop control of fixed-angle rotation, while servo motors are suitable for closed-loop control of precise positioning. Their control methods differ, requiring the same controller to issue pulse signals and analog signals respectively to coordinate their operation. In practical applications, the controller first uses the stepper motor to rotate the rotating ring 202 to a specified angle, then uses the two servo motors to position the electric slide 301 and the telescopic component 302 to the target coordinates. These three actions are executed sequentially or synchronously, ultimately ensuring that the cleaning brush 303 accurately reaches any point on the insulator surface. While this multi-motor collaborative control increases system complexity, it provides comprehensive and precise control over the cleaning path and cleaning intensity.

[0037] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A high-voltage porcelain insulator for pollution flashover prevention, comprising an insulator body (1), wherein terminals (101) are fixedly connected to both ends of the insulator body (1), characterized in that: A rotating ring (202) is rotatably connected to the periphery of the terminal (101) via a ring bearing (201). An extension rod (203) is fixedly connected to one end of the rotating ring (202). The ends of the two extension rods (203) are connected to a connecting plate (204). An electric slide (301) is fixedly provided on the side of the connecting plate (204) facing the insulator body (1). A telescopic assembly (302) is fixedly connected to the movable part of the electric slide (301). A cleaning brush (303) is fixedly connected to the movable part of the telescopic assembly (302). The working surface of the cleaning brush (303) is evenly provided with cleaning brush (303) bristles. An internal gear ring (401) is fixedly connected to the side of one of the rotating rings (202) facing the insulator body (1). A rotation drive assembly for driving the internal gear ring (401) is fixedly connected to the outside of one of the terminal (101).

2. The anti-flashover type high-voltage porcelain insulator according to claim 1, characterized in that: The telescopic component (302) is configured as an electric cylinder.

3. The anti-flashover type high-voltage porcelain insulator according to claim 2, characterized in that: The rotation drive assembly includes a forward and reverse reversible drive motor (421), the output shaft of which is fixedly connected to a drive gear (422) adapted to the internal gear ring (401).

4. A high-voltage porcelain insulator for preventing flashover according to claim 3, characterized in that: The drive motor (421) is a stepper motor, and the telescopic component (302) and the electric slide (301) are both driven by servo motors.

5. A high-voltage porcelain insulator for preventing flashover according to claim 1, characterized in that: The cleaning brush (303) bristles include an elastic plastic inner core, and the elastic plastic inner core is wrapped with a flexible silicone layer.

6. A high-voltage porcelain insulator for preventing flashover according to claim 1, characterized in that: The extension rod (203) and the connecting plate (204) are both uniformly fixed with reinforcing ribs on their outer surfaces, and both the extension rod (203) and the connecting plate (204) are made of 304 stainless steel.

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