An organic composite insulator with automatic dusting function

Abstract

This invention relates to an organic composite insulator with an automatic dust-shaking function, belonging to the technical field of organic composite insulators. A dust-shaking mechanism is arranged between the insulator's core rod and the shed sheath. This mechanism consists of a support part, a guide part, a connecting part, and a driving part. A first annular block is provided at the end of the guide part, and a second annular block is coaxially provided at the end of the connecting part. Grooves and hemispherical protrusions are respectively arranged on the opposite end faces of the two annular blocks. A return spring is sleeved between the first annular block and the support part. When the driving part drives the connecting part and the second annular block to rotate, the hemispherical protrusion and groove periodically engage and disengage, forcing the first annular block and the guide part to reciprocate and compress the return spring, forming a periodic shaking along the core rod axis. This shaking is transmitted to the shed sheath through its interaction with the shed sheath, causing the dust on its surface to be automatically shaken off. The mechanical periodic pulsation within the structure replaces traditional impact-type cleaning, significantly reducing stress impact on the shed sheath root and dependence on environmental conditions.

Description

Technical Field

[0001] This invention belongs to the field of organic composite insulator technology, specifically relating to an organic composite insulator with an automatic dust-shaking function. Background Technology

[0002] Organic composite insulators, as key insulation and support components in power systems, are significantly affected by surface contamination, which is a major factor impacting their insulation performance. To address this issue, existing technologies have proposed insulator designs with automatic cleaning functions. For example, patent CN110534272B provides a typical wind-driven solution. This insulator features a rotating cylinder with a vertical plate at the top, driven by natural wind. The rotation is converted into hydraulic or pneumatic pressure changes via gear pairs, eccentric connecting rods, and piston mechanisms. This, in turn, controls the periodic expansion and contraction of multiple rubber balloons distributed between the core and the skirt, pushing the skirt to slide axially. During this sliding process, the skirt mechanically impacts the positioning blocks at both ends. Combined with the vibration generated by the rotating components, this process effectively shakes off surface dust. This solution achieves automatic cleaning using ambient wind energy, reducing the need for manual maintenance to some extent.

[0003] However, the aforementioned wind-driven impact cleaning scheme still has some shortcomings in actual operation. First, its cleaning force and vibration intensity are directly affected by the wind force: when the wind is strong, the rotation speed of the rotating cylinder increases, the kinetic energy output by the transmission mechanism increases, and the impact force between the shed and the positioning block is significantly enhanced. Long-term or frequent strong impacts can easily cause stress concentration at the root of the shed, which may cause fatigue damage, cracking or detachment from the core rod of the silicone rubber material, thereby affecting the sealing performance and mechanical strength, and even shortening the overall life of the insulator. Second, the structure of this scheme is complex and has many moving parts, which are prone to wear, corrosion or jamming in harsh outdoor environments, resulting in insufficient reliability. In addition, its function depends entirely on the continuous presence of natural wind. The cleaning function fails under conditions of no wind, light wind or unstable wind direction, and the timely removal of dirt cannot be guaranteed. To address this, an organic composite insulator with an automatic dust shaking function is proposed. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides an organic composite insulator with an automatic dust-removing function. This solves the problem of how to reliably and promptly remove dirt from the surface of the composite insulator under complex outdoor conditions without relying on natural wind and while reducing harmful impacts on the skirts and structural complexity, thereby ensuring long-term insulation performance and lifespan.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An organic composite insulator with automatic dust-removing function includes a core rod, several shed sheaths sleeved outside the core rod, several dust-removing mechanisms disposed between the outer wall of the core rod and the inner walls of the shed sheaths, and a first mounting hardware and a second mounting hardware respectively disposed at both ends of the core rod. Each dust-removing mechanism includes a support portion fixed to the core rod, a guide portion slidably disposed along the core rod axis, a connecting portion rotatably disposed on the support portion, and a driving portion. A first annular block is disposed at one end of the guide portion, and a second annular block is coaxially disposed at one end of the connecting portion. The guide portion between the first annular block and the support portion... A return spring is fitted, with its two ends abutting against the first annular block and the support portion, respectively. The end face of the first annular block facing the second annular block has several grooves arranged in a ring. The end face of the second annular block facing the first annular block has several hemispherical protrusions that cooperate with the grooves. The driving portion drives the connecting portion and the second annular block to rotate. The hemispherical protrusions on the rotating second annular block periodically engage or disengage with the grooves on the first annular block. The first annular block and the guide portion compress the return spring and generate axial vibration, causing the dust on the outside of the umbrella skirt cover to fall off automatically.

[0007] As a further embodiment of the present invention, the driving unit includes a high-voltage self-powered power supply and a micro motor. Both the high-voltage self-powered power supply and the micro motor are mounted on the support unit. The high-voltage self-powered power supply is electrically connected to the micro motor. The micro motor is used to drive the connecting unit to rotate. The two ends of the high-voltage self-powered power supply are respectively connected to the first mounting hardware and the second mounting hardware through wires. The high-voltage self-powered power supply is used to convert the potential difference of the insulator during operation into electrical energy and supply power to the micro motor.

[0008] As a further embodiment of the present invention, both the first annular block and the second annular block are fitted with elastic sleeves, and the elastic sleeves are in contact with the inner wall of the umbrella skirt sheath.

[0009] As a further embodiment of the present invention, the first annular block and the second annular block have the same diameter and are coaxially arranged, the hemispherical protrusions and grooves are distributed equidistantly around the circumference, and the depth of the grooves is less than the radius of the hemispherical protrusions.

[0010] As a further embodiment of the present invention, the guide portion is a sleeve structure sleeved on the outer periphery of the mandrel, and an annular sliding gap is provided between the guide portion and the mandrel. The radial dimension of the gap is greater than the maximum radial displacement of the guide portion caused by the engagement or disengagement of the hemispherical protrusion and the groove.

[0011] As a further embodiment of the present invention, a speed reduction transmission mechanism and a torque limiting mechanism are provided between the micro motor and the connecting part. The speed reduction transmission mechanism is used to reduce the rotational speed and increase the output torque. The torque limiting mechanism slips when the dust shaking mechanism is obstructed or jammed, so as to protect the micro motor, the first annular block and the second annular block from overload damage.

[0012] As a further embodiment of the present invention, the high-voltage side self-powered power supply includes a current limiting unit, an energy storage unit, and a voltage control unit. The energy storage unit intermittently supplies power to the micromotor to form periodic dust shaking. The energy storage unit is a capacitor. The voltage control unit and the micromotor drive circuit constitute a control module for controlling the on / off state of the micromotor according to the voltage threshold of the energy storage unit.

[0013] As a further embodiment of the present invention, the end face groove of the first annular block facing the second annular block has a rounded corner transition on the inlet side, and the hemispherical protrusion surface on the second annular block is provided with a wear-resistant layer.

[0014] As a further aspect of the present invention, a retaining ring is provided between the first annular block and the support portion. The retaining ring is used to limit the maximum axial compression stroke of the guide portion relative to the support portion, so that the vibration amplitude is kept within a set range.

[0015] As a further embodiment of the present invention, several of the dust-shaking mechanisms are distributed along the axial direction of the core rod and respectively correspond to several umbrella skirt sheaths, and the circumferential phases of the hemispherical protrusions and grooves on the second annular blocks of adjacent dust-shaking mechanisms are staggered from each other.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention incorporates a dust-shaking mechanism between the insulator's core rod and the shed sheath. This mechanism comprises a support section, a guide section, a connecting section, and a drive section. A first annular block is located at the end of the guide section, and a second annular block is coaxially located at the end of the connecting section. Grooves and hemispherical protrusions are respectively arranged on the opposite end faces of the two annular blocks. A return spring is fitted between the first annular block and the support section. When the drive section rotates the connecting section and the second annular block, the hemispherical protrusion periodically engages and disengages from the groove, forcing the first annular block and the guide section to reciprocate and compress the return spring, forming a periodic shaking motion along the core rod's axial direction. This shaking motion is transmitted to the shed sheath through its interaction with the shed sheath, causing dust to automatically fall off its surface. Thus, without the need for natural wind, the mechanical periodic pulsation within the structure replaces traditional impact-based cleaning, achieving timely removal of contaminants and significantly reducing stress impact on the shed sheath root and dependence on environmental conditions. This solves the problem of how to reliably and promptly remove surface contaminants from composite insulators under complex outdoor conditions without relying on natural wind and while reducing harmful impacts on the shed sheath and structural complexity, thereby ensuring long-term insulation performance and lifespan. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram showing the installation position of the dust-removing mechanism of the present invention;

[0021] Figure 3 This is a schematic diagram of the dust-shaking mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the hemispherical protrusion structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the groove and the hemispherical convex joint of the present invention.

[0024] Explanation of key component symbols:

[0025] In the diagram: 1. Core rod; 2. Umbrella skirt sheath; 3. Dust-removing mechanism; 31. Support part; 32. Guide part; 33. Connecting part; 34. Drive part; 35. First annular block; 36. Second annular block; 37. Return spring; 38. Hemispherical protrusion; 39. Groove; 4. First mounting hardware; 5. Second mounting hardware. Detailed Implementation

[0026] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0027] Please see Figure 1 - Figure 5 As shown, this embodiment provides an organic composite insulator with an automatic dust-shaking function, including a core rod 1, several shed sheaths 2 sleeved outside the core rod 1, several dust-shaking mechanisms 3 disposed between the outer wall of the core rod 1 and the inner walls of the several shed sheaths 2, and a first mounting hardware 4 and a second mounting hardware 5 respectively disposed at both ends of the core rod 1. The dust-shaking mechanism 3 includes a support part 31 fixed on the core rod 1, a guide part 32 slidably disposed along the axial direction of the core rod 1, a connecting part 33 rotatably disposed on the support part 31, and a driving part 34. One end of the guide part 32 is provided with a first annular block 35, and one end of the connecting part 33 is coaxially provided with a second annular block 36; the guide part between the first annular block 35 and the support part 31 A return spring 37 is fitted onto the 32. The two ends of the return spring 37 abut against the first annular block 35 and the support part 31, respectively. The end face of the first annular block 35 facing the second annular block 36 is provided with a plurality of grooves 39 distributed around it. The end face of the second annular block 36 facing the first annular block 35 is provided with a plurality of hemispherical protrusions 38 that cooperate with the grooves 39. The driving part 34 drives the connecting part 33 and the second annular block 36 to rotate. The hemispherical protrusions 38 on the rotating second annular block 36 periodically engage or disengage with the grooves 39 on the first annular block 35. The first annular block 35 and the guide part 32 compress the return spring 37 and generate axial vibration, so that the dust on the outside of the umbrella skirt cover 2 is automatically shaken off.

[0028] It should be noted that, in order to solve the problem of absolute dependence on natural wind, this solution abandons passive drive mechanisms such as windmills and rotating drums, and instead sets up a drive unit 34 containing a high-voltage self-powered power supply and a micro motor. The high-voltage self-powered power supply and micro motor are further explained below. The principle is to utilize the power frequency or operating potential difference that inevitably exists between the hardware at both ends of the insulator during operation, and convert it into DC power that can power the micro motor through power conversion technology. This design fundamentally eliminates the constraints of environmental wind force, allowing the dust shaking function to be activated as needed under any weather conditions, ensuring the timeliness and reliability of cleaning. To avoid the rigid impact between the umbrella skirt and the positioning block in the existing technology and the resulting risk of damage, this solution designs a conversion mechanism from rotation to axial shaking. The core of this mechanism is that the rotating second annular block 36 periodically shakes through the hemispherical protrusion 38 on its end face. The groove 39 on the end face of the first annular block 35, which is fixed to the ground, engages and disengages. When engaged, the protrusion pushes the first annular block 35 and the guide part 32 fixed thereto to compress the return spring 37 and move axially. When disengaged, the compressed return spring 37 releases its elastic force instantly, causing the first annular block 35 and the guide part 32 to bounce back quickly. This cycle converts the stable rotational motion of the micro motor into high-frequency, small-amplitude axial mechanical vibration. This vibration is transmitted to the inner wall of the umbrella skirt sheath 2 through the first annular block 35, causing the umbrella skirt to vibrate and shake off dust. In addition, the vibration generated by this solution is a continuous, elastic, and controllable mechanical vibration. Its force is determined by the elastic force of the return spring 37 and the geometry of the protrusion and groove 39. It is not strongly linearly related to the driving speed and there is no rigid impact point. This completely eliminates the risk of fatigue, cracking, or detachment of the umbrella skirt material caused by the cleaning action itself, and protects the main structure of the insulator.

[0029] The current wind-driven impact cleaning solution still has some shortcomings in actual operation. First, its cleaning force and vibration intensity are directly affected by the wind force: when the wind is strong, the rotation speed of the rotating cylinder increases, the kinetic energy output by the transmission mechanism increases, and the impact force between the umbrella skirt and the positioning block is significantly enhanced. Long-term or frequent strong impacts can easily cause stress concentration at the root of the umbrella skirt, which may cause fatigue damage, cracking or detachment of the silicone rubber material from the core rod 1, thereby affecting the sealing performance and mechanical strength, and even shortening the overall life of the insulator. Second, the structure of this solution is complex and has many moving parts, which are prone to wear, corrosion or jamming in harsh outdoor environments, resulting in insufficient reliability. In addition, its function depends entirely on the continuous presence of natural wind. The cleaning function fails under conditions of no wind, light wind or unstable wind direction, and the timely removal of dirt cannot be guaranteed.

[0030] To address the aforementioned issues, in this embodiment, a dust-removing mechanism 3 is arranged between the insulator's core rod 1 and the shed sheath 2. This mechanism comprises a support part 31, a guide part 32, a connecting part 33, and a driving part 34. A first annular block 35 is provided at the end of the guide part 32, and a second annular block 36 is coaxially provided at the end of the connecting part 33. Grooves 39 and hemispherical protrusions 38 are respectively arranged on the opposite end faces of the two annular blocks. A return spring 37 is sleeved between the first annular block 35 and the support part 31. When the driving part 34 drives the connecting part 33 and the second annular block 36... When the block 36 rotates, the hemispherical protrusion 38 and the groove 39 periodically engage and disengage, forcing the first annular block 35 and the guide part 32 to reciprocate and compress the return spring 37, forming a periodic vibration along the axis of the core rod 1. This vibration is transmitted to the umbrella skirt through its cooperation with the umbrella skirt sheath 2, causing the dust on its surface to fall off automatically. Thus, without the need for natural wind, the mechanical periodic pulsation within the structure replaces the traditional impact-type cleaning, achieving timely removal of dirt and significantly reducing the stress impact on the root of the umbrella skirt and dependence on environmental conditions.

[0031] To better utilize the potential difference between the first mounting hardware 4 and the second mounting hardware 5 at both ends of the insulator for self-energy extraction, a micro-motor is driven by electrical energy conversion to rotate the connecting part 33, providing controllable and continuous mechanical input. In one embodiment, the driving part 34 includes a high-voltage side self-energy extraction power supply and a micro-motor. Both the high-voltage side self-energy extraction power supply and the micro-motor are mounted on the support part 31. The high-voltage side self-energy extraction power supply is electrically connected to the micro-motor, which drives the connecting part 33 to rotate. The two ends of the high-voltage side self-energy extraction power supply are connected to the first mounting hardware 4 and the second mounting hardware 5 respectively via wires. The high-voltage side self-energy extraction power supply is used to convert the potential of the insulator during operation. The differential energy is converted into electrical energy and used to power the micro motor. A speed reduction transmission mechanism and a torque limiting mechanism are provided between the micro motor and the connecting part 33. The speed reduction transmission mechanism is used to reduce the speed and increase the output torque. The torque limiting mechanism slips when the dust shaking mechanism 3 is blocked or jammed, so as to protect the micro motor, the first ring block 35 and the second ring block 36 from overload damage. The high-voltage side self-powered power supply includes a current limiting unit, an energy storage unit and a voltage control unit. The energy storage unit intermittently supplies power to the micro motor to form periodic dust shaking. The energy storage unit is a capacitor. The voltage control unit and the micro motor drive circuit constitute a control module, which is used to control the on and off of the micro motor according to the voltage threshold of the energy storage unit.

[0032] By utilizing the insulator's own operating voltage for energy, the dust-shaking function is completely unaffected by weather and time, ensuring timely and absolutely reliable cleaning. The reduction gear converts the motor's high speed to a low speed suitable for driving the cam mechanism, while simultaneously increasing the output torque. This ensures reliable operation of the shaking mechanism even when there is frictional resistance between the umbrella skirt sheath 2 and the core rod 1. The torque limiting mechanism slips when the mechanism jams, cutting off the transmission of overload torque to the motor and precision cam structure, effectively protecting the motor and mechanical transmission components, and significantly improving the system's robustness and service life. Based on the control logic of the energy storage unit's voltage threshold, an intermittent working mode from energy storage to discharge to re-energy storage is achieved. This simulates the natural process of concentrated cleaning after a certain amount of accumulated dirt, avoiding continuous motor idling, optimizing energy consumption, reducing mechanical wear, and adding a reduction gear. The transmission mechanism is designed to address the mismatch between the motor's output characteristics and load requirements. Through gear sets or worm gears, the high speed of the motor (thousands of revolutions per minute) is reduced to a suitable speed of tens or hundreds of revolutions per minute. Simultaneously, the torque is amplified according to the reduction ratio, ensuring sufficient torque to overcome resistance and smoothly and powerfully drive the second annular block 36 to rotate. This ensures a clear and forceful engagement and disengagement of the protrusion and groove 39. The torque limiting mechanism can be a friction clutch or a torsion spring clutch. This mechanism is designed to automatically slip or disengage when the output torque exceeds a set safety value, thus mechanically decoupling the motor's rotational motion from the load in the event of an overload. The energy storage unit and voltage control unit are configured to achieve intelligent operation and energy efficiency optimization. The capacitor, as an energy storage unit, can buffer the collected electrical energy, ensuring it is sufficient to drive the motor to complete one or more ash-shaking cycles. The pressure control unit acts as an intelligent switch, monitoring the capacitor voltage. When the voltage rises to the upper threshold, the motor starts working until the voltage drops to the lower threshold, then stops working and continues charging. This design makes the cleaning action intermittent and pulsed, which is more in line with the actual dirt accumulation pattern and greatly extends the standby and working life of the system.

[0033] To effectively couple axial vibration to the skirt while reducing hard contact wear, in one embodiment, elastic sleeves are fitted onto both the first annular block 35 and the second annular block 36. These elastic sleeves fit snugly against the inner wall of the skirt sheath 2. Under pressure, the elastic sleeves deform, tightly filling all microscopic gaps between the outer surface of the annular block and the inner wall of the skirt sheath 2, forming a large-area, uniform flexible contact surface. This ensures that vibration energy is efficiently and with low loss transmitted to the entire corresponding area of ​​the skirt sheath 2, significantly improving vibration transmission efficiency and the uniformity of the cleaning effect. Furthermore, the elastic sleeves act as a soft buffer, isolating the first annular block 35 from direct contact with the skirt sheath 2 of the insulator body. They absorb microscopic impacts and friction between components, fundamentally preventing mechanical wear and scratches on the inner wall of the skirt sheath 2, and protecting the critical insulation and sealing structures of the insulator body.

[0034] Since the first annular block 35 and the second annular block 36 are discretely meshed, and discrete meshing is an intermittent contact, if the coaxiality is poor or the groove depth is not properly designed, meshing difficulties may occur, leading to failure or a sudden increase in energy consumption. In order to ensure the smoothness and repeatability of meshing and disengagement, avoid jamming, and ensure stable vibration amplitude, in one embodiment, the first annular block 35 and the second annular block 36 have the same diameter and are coaxially arranged. The hemispherical protrusion 38 and the groove 39 are distributed equidistantly around the circumference, and the depth of the groove 39 is less than the radius of the hemispherical protrusion 38. Coaxiality and equal diameter ensure concentricity, equidistant surrounding makes the pulse uniform, and the depth of the groove 39 is less than the radius of the hemispherical protrusion 38 to form a disengageable geometric relationship to avoid jamming.

[0035] Due to the small radial force and sway accompanying axial vibration, to prevent the guide part 32 from interfering with the core rod 1 and causing scratches or jamming, in one embodiment, the guide part 32 is a sleeve structure sleeved on the outer periphery of the core rod 1. An annular sliding gap is provided between the guide part 32 and the core rod 1. The radial dimension of the gap is greater than the maximum radial displacement of the guide part 32 caused by the engagement or disengagement of the hemispherical protrusion 38 and the groove 39. The sleeve-type guide and the provision of sufficient radial gap avoid interference and jamming, and ensure smooth axial sliding.

[0036] To avoid inlet impact wear, stress concentration, and material fatigue caused by the repeated, instantaneous engagement and disengagement of the hemispherical protrusion 38 and groove 39 during long-term, high-frequency operation of the vibration mechanism, in one embodiment, the end face groove 39 of the first annular block 35 facing the second annular block 36 has a rounded corner transition on the inlet side, and the surface of the hemispherical protrusion 38 on the second annular block 36 is provided with a wear-resistant layer. When the second annular block 36 rotates at high speed, the hemispherical protrusion 38 periodically impacts the inlet edge of the groove 39. This instantaneous contact will generate significant stress concentration at the edge of the groove 39, which can easily lead to chipping or micro-cracks at the inlet of the groove 39 under long-term action; at the same time, the protrusion surface... For components that directly bear friction and impact, there is also the risk of surface wear and plastic deformation, both of which can lead to decreased meshing accuracy, vibration instability, and even mechanism failure. To address this, a rounded transition is provided on the inlet side of the groove 39, which guides the protrusion to slide in smoothly with a smooth curved surface, transforming the impact of sharp edges into a gradual contact force, greatly dispersing local stress, and avoiding brittle damage caused by edge stress concentration. Furthermore, a wear-resistant layer is added to the surface of the hemispherical protrusion 38, such as by spraying hard alloy, ceramic coating, or nitriding treatment, which improves its surface hardness, reduces the coefficient of friction, and significantly enhances its resistance to wear and plastic deformation, ensuring the long-term stability of the protrusion's geometry.

[0037] Furthermore, the return spring 37 may be overcompressed during operation due to extreme environmental changes, such as low-temperature hardening, local jamming, or a sudden increase in energy pulse, leading to uncontrolled jitter amplitude, a surge in impact force, and component fatigue damage. To prevent overcompression of the return spring 37 and uncontrolled jitter amplitude, and to prevent component damage under extreme conditions, in one embodiment, a retaining ring is provided between the first annular block 35 and the support portion 31. The retaining ring is fixed to the support portion 31 and located at the end face of the support portion 31 facing the first annular block 35. The retaining ring is used to limit the maximum axial compression stroke of the guide portion 32 relative to the support portion 31, keeping the jitter amplitude within a set range. When the guide portion 32 drives the first annular block 35 to move towards the support portion 31 to compress the return spring 37, the retaining ring is pre-set and fixed to the first annular block 35. On the axial path between 5 and support 31, its installation position determines the maximum allowable compression stroke of the spring. Once the first annular block 35 is pushed towards support 31 and makes physical contact with the retaining ring during movement, the compression movement is immediately stopped. This design ensures that no matter how the driving force or external conditions change, the compression of the return spring 37 is strictly limited within a safe range, thereby stably constraining the jitter amplitude within a preset, optimal range. Its benefits are twofold: first, it protects the return spring 37 itself, preventing it from being compressed and causing plastic deformation or failure, thus maintaining the long-term stability of the elastic force; second, it protects the entire transmission chain, avoiding excessive inertial impact force caused by excessive amplitude. Such impact force may damage the precision mating surfaces such as the hemispherical protrusion 38 and groove 39, or cause overload to the connection point of the core rod 1 and support 31.

[0038] It is worth mentioning that, since discrete pulses will have their peak values ​​added when they are superimposed at the same frequency and in phase, resonance and noise are easily caused near the structure's natural frequency. If multiple umbrella skirts vibrate in phase, they may cause synchronous impact and local resonance on the core rod 1 / fittings, and cause the instantaneous power demand to peak. In this regard, in one embodiment, several dust-shaking mechanisms 3 are distributed along the axial direction of the core rod 1 and correspond to several umbrella skirt sleeves 2 respectively. The circumferential phases of the hemispherical protrusions 38 and grooves 39 on the second annular blocks 36 of adjacent dust-shaking mechanisms 3 are staggered from each other. By staggering the circumferential phases of the protrusions and grooves 39 of adjacent dust-shaking mechanisms 3, the vibration time is staggered through mechanical peak loading, avoiding resonance and concentrated load, reducing noise and energy peaks, making cleaning more uniform, and increasing the overall mechanical and electrical safety margin.

[0039] Finally, it should be noted that the functions of the return spring 37 and the elastic sleeve can also be integrated. A flexible body with axial elasticity and a high coefficient of friction on the outer surface, such as a rubber material molded part, can be used to simultaneously serve as a reset element and a coupling element for transmitting vibration, replacing the independent return spring and external elastic sleeve. This simplifies the number of parts, reduces component quantity, simplifies assembly, and improves system reliability and environmental sealing.

[0040] Working principle and usage process of this invention:

[0041] The high-voltage side self-powered power supply collects the operating potential difference between the first mounting hardware 4 and the second mounting hardware 5 at both ends of the insulator in real time, converts it into DC power and stores it in the energy storage unit. When the energy storage voltage reaches the preset upper limit, the control module starts the micro motor. After the micro motor is decelerated and torque is increased by the deceleration transmission mechanism, it drives the connecting part 33 and the second annular block 36 coaxial with it to rotate at a uniform speed. The hemispherical protrusions 38, evenly distributed on the end face of the second annular block 36, rotate accordingly and periodically embed themselves into the corresponding grooves 39 on the end face of the first annular block 35. At the moment of embedding, the hemispherical protrusions 38 push the first annular block 35 and the guide part 32 to slide along the axial direction of the core rod 1, compressing the return spring 37 located between it and the support part 31. When the hemispherical protrusions 38 rotate and disengage from the grooves 39, the return spring 37 instantly releases its stored energy, causing the first annular block 35 and the guide part 32 to bounce back at high speed. This continuous cycle of embedding, disengagement, and bounce back converts the rotational motion into high-frequency, small-amplitude mechanical vibration along the axial direction of the core rod 1. Through the elastic sleeve fitted around the first annular block 35 and the second annular block 36, the mechanical pulsation originally concentrated at discrete contact points is converted into a continuous and uniform surface contact shear force covering the inner wall of the umbrella skirt sheath 2. When the dust shaking mechanism 3 drives the first annular block 35 to slide along the axial direction of the core rod at high speed... During rapid reciprocating micro-motion, the elastic sleeve deforms and fits tightly against the inner wall of the umbrella skirt sheath 2, forming a periodic shear stress field on the contact surface. This shear force is parallel to the umbrella skirt surface, effectively cutting into and destroying the adhesion interface between dust particles and silicone rubber material, causing the entire dirt layer to loosen. At the same time, the flexibility of the elastic sleeve allows the force to be dispersed to the entire annular contact area corresponding to the first annular block 35, rather than concentrated at a certain point or a narrow ring, thereby significantly reducing the stress peak per unit area and avoiding stress concentration at the root of the umbrella skirt. Unlike the transient, high-intensity point impact between the umbrella skirt and the positioning block in traditional impact-type cleaning schemes, this method achieves efficient dust removal while significantly reducing the risk of local fatigue and damage at the root of the umbrella skirt caused by the cleaning action, thus improving the reliability and lifespan of the insulator during long-term operation.

[0042] The vibration is transmitted efficiently and evenly to the inner wall of the umbrella skirt sheath 2, which is tightly fitted to the ring block, through the elastic sleeve fitted outside the ring block. This causes high-frequency micro-amplitude vibration of the umbrella skirt sheath 2 as a whole and its surface, so that the dust and dirt accumulated on its surface are loosened and fall off due to inertia. This achieves timely, automatic and low-damage removal of dirt from the surface of the insulator and significantly reduces dependence on environmental wind.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An organic composite insulator with automatic dusting function, characterized in that, It includes a core rod, several umbrella skirts and protective sleeves fitted over the core rod, several dust-removing mechanisms disposed between the outer wall of the core rod and the inner walls of the umbrella skirts and protective sleeves, and a first mounting hardware and a second mounting hardware disposed at both ends of the core rod. The dust-shaking mechanism includes a support fixed to the core rod, a guide slidably arranged along the core rod axis, a connecting part rotatably arranged on the support, and a driving part. One end of the guide is provided with a first annular block, and one end of the connecting part is coaxially provided with a second annular block. A return spring is sleeved on the guide between the first annular block and the support. The two ends of the return spring abut against the first annular block and the support, respectively. The end face of the first annular block facing the second annular block has several grooves arranged in a ring. The end face of the second annular block facing the first annular block has several hemispherical protrusions that cooperate with the grooves. The driving part drives the connecting part and the second annular block to rotate. The hemispherical protrusions on the second annular block periodically engage or disengage with the grooves on the first annular block. The first annular block and the guide compress the return spring and generate axial shaking, so that the dust on the outside of the umbrella skirt cover is automatically shaken off. The drive unit includes a high-voltage self-powered power supply and a micro motor that are electrically connected to each other. Both the high-voltage self-powered power supply and the micro motor are mounted on the support unit. The micro motor is used to drive the connecting unit to rotate. The two ends of the high-voltage self-powered power supply are connected to the first mounting hardware and the second mounting hardware respectively through wires. The high-voltage self-powered power supply is used to convert the potential difference of the insulator during operation into electrical energy and to supply power to the micro motor.

2. An organic composite insulator with automatic dusting function according to claim 1, characterized in that, Both the first and second annular blocks are fitted with elastic sleeves, which fit snugly against the inner wall of the umbrella skirt sheath.

3. An organic composite insulator with automatic dusting function according to claim 1, characterized in that, The first and second annular blocks have the same diameter and are coaxially arranged. The hemispherical protrusions and grooves are distributed equidistantly around the circumference, and the depth of the grooves is less than the radius of the hemispherical protrusions.

4. An organic composite insulator with automatic de-dusting function according to claim 3, characterized in that, The guide part is a sleeve structure fitted around the outer periphery of the mandrel. An annular sliding gap is provided between the guide part and the mandrel. The radial dimension of the gap is greater than the maximum radial displacement of the guide part caused by the engagement or disengagement of the hemispherical protrusion and the groove.

5. An organic composite insulator with automatic dust-shaking function according to claim 1, characterized in that, A speed reduction transmission mechanism and a torque limiting mechanism are provided between the micro motor and the connecting part to reduce the speed and increase the output torque. The torque limiting mechanism protects the micro motor, the first annular block and the second annular block from overload damage when the dust shaking mechanism is obstructed or jammed and slips.

6. An organic composite insulator with automatic dust-shaking function according to claim 5, characterized in that, The high-voltage side self-powered power supply includes a current limiting unit, an energy storage unit, and a voltage control unit. The energy storage unit intermittently supplies power to the micromotor to form periodic dust shaking. The energy storage unit is a capacitor. The voltage control unit and the micromotor drive circuit constitute a control module, which is used to control the on / off state of the micromotor according to the voltage threshold of the energy storage unit.

7. An organic composite insulator with automatic dust-shaking function according to claim 3, characterized in that, The groove on the end face of the first annular block facing the second annular block has a rounded corner transition on the inlet side, and the hemispherical protrusion surface on the second annular block has a wear-resistant layer.

8. An organic composite insulator with automatic de-icing function according to claim 7, characterized in that, A retaining ring is provided between the first annular block and the support portion, and the retaining ring is used to limit the maximum axial compression stroke of the guide portion relative to the support portion.

9. An organic composite insulator with automatic de-icing function according to claim 1, characterized in that, Several of the aforementioned dust-shaking mechanisms are distributed along the axial direction of the core rod and correspond to several umbrella skirt sheaths respectively. The hemispherical protrusions on the second annular blocks of adjacent dust-shaking mechanisms are circumferentially offset from the grooves on the first annular blocks.

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