Post insulator

Abstract

The invention discloses a post insulator, and relates to the field of insulators, the post insulator comprises a mounting base, an insulating rod core is fixed on the mounting base, the insulating rod core is coaxially sleeved and rotatably connected with an insulator, the insulator comprises a plurality of umbrella skirts, the umbrella skirts are integrally formed and connected through a connecting sleeve, and the connecting sleeve is provided with a plurality of purging holes for purging the umbrella skirts; a blowing assembly used for providing airflow for the blowing holes is fixed in the bottom connecting sleeve, and a plurality of first air holes used for the blowing assembly to suck air are formed in the mounting base. A driving assembly is fixed to the bottom connecting sleeve. The insulator rotates centrifugally after being driven by the driving assembly, and water stains and / or dust on the surface of the umbrella skirt are / is centrifugally separated; air flow generated after the purging assembly is driven by the driving assembly is conveyed to the purging hole, the air flow purges the surface of the umbrella skirt in centrifugal rotation through the purging hole, an air barrier is formed, and the problem of pollution flashover caused by the fact that the insulation level of dirt attached to the surface of the post insulator is reduced under the humid condition is solved.

Description

Technical Field

[0001] This invention relates to the field of insulators, and more particularly to a post insulator. Background Technology

[0002] Post insulators are special insulating components that play a crucial role in overhead transmission lines. Insulators serve two fundamental functions in overhead transmission lines: supporting the conductors and preventing current from returning to ground. Both functions must be guaranteed. However, after prolonged use, post insulators accumulate a large amount of dust on their surface. Under humid conditions, the soluble substances in the dirt adhered to the insulation surface gradually dissolve in water, forming a conductive film. This significantly reduces the insulator's insulation level, leading to a strong discharge phenomenon under the influence of the electric field—known as flashover. Ultimately, this causes the insulator to lose its insulating function, thus impairing the service life and operational lifespan of the entire transmission line. Summary of the Invention

[0003] The purpose of this invention is to provide a post insulator that addresses the problem of flashover caused by reduced insulation levels due to contaminants adhering to the surface of post insulators under humid conditions.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: including a mounting base, on which an insulating rod core is fixed, the insulating rod core is coaxially sleeved and rotatably connected to an insulator, the insulator includes multiple umbrella skirts, the multiple umbrella skirts are integrally connected by a connecting sleeve, and the connecting sleeve has multiple blowing holes for blowing the umbrella skirts.

[0005] A purge assembly for providing airflow to the purge hole is fixed inside the connecting sleeve at the bottom, and a plurality of first air holes for the purge assembly to draw in air are provided on the mounting base;

[0006] The drive assembly is fixed to the connecting sleeve at the bottom;

[0007] The insulator is driven by the drive assembly to rotate centrifugally, and water stains and / or dust on the surface of the umbrella skirt are removed by centrifugation.

[0008] The airflow generated by the purging assembly after being driven by the drive assembly is delivered to the purging hole. The airflow purifies the centrifugally rotating umbrella skirt surface through the purging hole and forms an air barrier.

[0009] As a further description of the above technical solution: the drive assembly includes a collar adapted to the outer diameter of the connecting sleeve, and a plurality of cup rods are distributed in a ring around the collar, with a wind cup installed at the end of the cup rod away from the collar;

[0010] The purging assembly includes a mounting sleeve that is adapted to the inner diameter of the connecting sleeve, and a plurality of annularly distributed blades are fixed on the inner wall of the mounting sleeve.

[0011] As a further description of the above technical solution: the wind cup is rotatably connected to the cup rod;

[0012] The bottom connecting sleeve has a second air hole near the top of the mounting sleeve;

[0013] The mounting sleeve has a third vent hole corresponding to the second vent hole;

[0014] Both the first and third air vents are equipped with filter screens;

[0015] A one-way valve is installed on the top of the mounting sleeve, and the one-way valve opens only in the direction of the purge hole.

[0016] As a further description of the above technical solution: the one-way valve includes an annular plate coaxially fixed to the top of the mounting sleeve, and the inner diameter of the annular plate is adapted to the outer diameter of the insulating rod core;

[0017] The ring plate has multiple sets of annularly distributed valve holes, and a rubber sheet is fixedly installed in each set of valve holes. The outer diameter of the rubber sheet is larger than the outer diameter of each set of valve holes.

[0018] As a further description of the above technical solution: a sleeve is fixed to one side of the wind cup, the sleeve is rotatably connected to the cup rod, two limiting blocks are symmetrically fixed on the sleeve, and a limiting rod is fixed on the cup rod and placed between the two limiting blocks.

[0019] As a further description of the above technical solution: the purge hole is parallel to the upper surface of the umbrella skirt.

[0020] As a further description of the above technical solution: an insulating cover is fixedly installed on the top of the insulating rod core, the connecting sleeve at the top is fitted inside the insulating cover, and the lower surface of the insulating cover is in contact with the umbrella skirt at the top.

[0021] As a further description of the above technical solution: the wind cup has a frustum-shaped structure, and a drainage hole is provided at the bottom of the wind cup.

[0022] As a further description of the above technical solution: the mounting base includes a flange, on which a riser is fixedly mounted, and the first air hole is opened on the riser.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. This application actively removes water droplets and dust particles adhering to the surface by using the centrifugal force of the rotating umbrella skirt, effectively preventing "crawling" in rainy weather and "flashover" in humid environments. The rotating airflow generated by the blowing component is precisely guided to the surface of the umbrella skirt through the blowing holes, enhancing the cleaning effect, especially for removing residual water stains and fine dust. The continuously rotating insulator disrupts the stability of birds' nests, avoiding the short circuit hazard caused by bird nests. The entire system is driven by natural wind power to rotate and generate airflow, with zero power consumption.

[0025] 2. By forming multiple air barriers along the edge of the umbrella skirt through rotating airflow, rainwater is blocked from flowing down the insulator, significantly reducing the risk of creepage.

[0026] 3. The wind cup can be switched to rotate clockwise or counterclockwise according to the wind direction, ensuring that the cleaning system can be driven under different wind directions. When the blowing component rotates clockwise, it back-blown cleans the first air hole filter screen through the second air hole. When it rotates counterclockwise, it back-blown cleans the second air hole filter screen, ensuring that the air path is unobstructed and no manual intervention is required. Attached Figure Description

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0030] Figure 4 This is a schematic diagram of the overall exploded structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the exploded structure of the one-way valve of the present invention;

[0032] Figure 6 This is a schematic diagram of the purging assembly structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the cup rod structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the wind cup structure of the present invention;

[0035] Figure 9 This is a schematic diagram of the counterclockwise rotation state of the insulating rod core of the present invention;

[0036] Figure 10 This is a schematic diagram of the clockwise rotation state of the insulating rod core of the present invention.

[0037] Legend: 10. Mounting base; 11. Flange; 12. Riser; 121. First vent;

[0038] 20. Insulating rod core; 21. Insulating cover;

[0039] 30. Insulator; 31. Sheath; 32. Connecting sleeve; 33. Purge hole; 34. Second air hole;

[0040] 40. Purge assembly; 41. Mounting sleeve; 42. Blade; 421. Third air port; 43. Check valve; 431. Ring plate; 432. Valve port; 433. Rubber sheet;

[0041] 50. Drive assembly; 51. Collar; 52. Cup rod; 521. Limit rod; 53. Wind cup; 531. Drain hole; 532. Sleeve; 533. Limit block. Detailed Implementation

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] like Figure 1 - Figure 10 As shown, the present invention provides a post insulator, comprising a mounting base 10, on which an insulating rod core 20 is fixed. An insulator body 30 is coaxially sleeved and rotatably connected to the insulating rod core 20. The insulating rod core 20 and the insulator body 30 are rotatably connected by multiple ceramic bearings. The inner ring of each ceramic bearing is coaxially fixed to the insulating rod core 20, and the outer ring is fixed to the inner wall of the insulator body 30. Under the action of the outer ring, a rod gap (e.g., a spacer gap) is pre-formed between the insulating rod core 20 and the insulator body 30. Figure 3 As shown), the airflow generated by the purging assembly 40 is delivered to each purging hole 33 through the rod slot. The insulator 30 includes multiple umbrella skirts 31, which are integrally connected by a connecting sleeve 32 to ensure the overall strength of the insulator 30. Multiple purging holes 33 are provided on the connecting sleeve 32 for purging the umbrella skirts 31. The airflow is guided by the purging holes 33 and blown onto the surface of the umbrella skirts 31 to clean the dust and / or water stains on the surface of the umbrella skirts 31, preventing the adhesion of dust to the surface of the umbrella skirts 31. At the same time, the water stains are blown away by the purging holes 33, thereby minimizing the risk of arc discharge.

[0044] A purge assembly 40 for providing airflow to the purge hole 33 is fixed inside the bottom connecting sleeve 32. When the purge assembly 40 rotates counterclockwise, the purge assembly 40 draws in outside air through a plurality of first air holes 121 opened on the mounting base 10. The first air holes 121 are located below the umbrella skirt 31 to avoid drawing in a large amount of rainwater when rotating in rainy weather.

[0045] The drive assembly 50 is fixed by the connecting sleeve 32 at the bottom, and the drive assembly 50 drives the insulator 30 and the purging assembly 40 to rotate.

[0046] After being driven by the drive assembly 50, the insulator 30 rotates centrifugally. Water stains and / or dust on the surface of the umbrella skirt 31 are removed by centrifugal force. During rainy weather, the water droplets move in a circular motion at the edge of the umbrella skirt 31 due to the centrifugal rotation of the umbrella skirt 31. At this time, the water droplets need centripetal force to maintain the circular trajectory. When the adhesion between the water droplets and the umbrella surface is insufficient to provide the required centripetal force, the water droplets will fly out along the tangential direction due to inertia, which is manifested as being "flipped" off the umbrella skirt 31. In this way, the rainwater cannot flow downward, thereby avoiding the problem of creepage of the insulator 30.

[0047] At the same time, dust particles cannot easily adhere to the surface of the rotating umbrella skirt 31, and the dust particles that do adhere are also "shaken off" by the centrifugally rotating umbrella skirt 31, thus keeping the surface of the umbrella skirt 31 clean and avoiding the problem of flashing due to dust adhering to the surface of the umbrella skirt 31 under humid conditions.

[0048] The airflow generated by the purge assembly 40 being driven by the drive assembly 50 and rotating counterclockwise is delivered to the purge hole 33. The airflow blows away water stains and / or dust on the surface of the centrifugally rotating umbrella skirt 31 through the purge hole 33. During the rotation of the airflow, it flows along the edge of the umbrella skirt 31. The rotating airflow makes the outer edge of the umbrella skirt 31 form an air barrier. The multi-layered umbrella skirt 31 forms multiple air barriers on the top and bottom, thereby expanding the protective area of ​​the umbrella skirt 31 and preventing rainwater from creeping along the insulator 30.

[0049] At the same time, the rotation of insulator 30 prevents birds from having a stable nesting environment, thus effectively preventing birds from nesting around insulator 30 and ensuring the safe and stable operation of the line.

[0050] like Figure 2 , Figure 4 , Figure 7 , Figure 8As shown, the drive assembly 50 is made of insulating rigid plastic material. The drive assembly 50 includes a collar 51 that is adapted to the outer diameter of the connecting sleeve 32. The collar 51 is coaxially fixed on the bottom connecting sleeve 32, and multiple cup rods 52 are distributed in a ring on the collar 51. A wind cup 53 is installed at the end of the cup rod 52 away from the collar 51. When the wind blows over the wind cup 53, the airflow generates a thrust on the wind cup 53, causing it to rotate around the insulating rod core 20. Thus, the wind cup 53, the cup rods 52 and the collar 51 drive the insulator 30 to rotate around the insulating rod core 20. The rotation speed of the wind cup 53 is proportional to the wind speed. That is, when the wind speed increases, the rotation speed of the wind cup 53 will also increase, and the rotation speed of the insulator 30 will also increase.

[0051] like Figure 2 , Figure 6 As shown, the purging assembly 40 includes a mounting sleeve 41 that is adapted to the inner diameter of the connecting sleeve 32. Multiple annularly distributed blades 42 are fixed on the inner wall of the mounting sleeve 41. A gap is reserved between the blades 42 and the insulating rod core 20 to avoid friction between the blades 42 and the insulating rod core 20 when they rotate. At the same time, the blades 42 are designed to tilt to the lower right. Therefore, when the multiple annularly distributed blades 42 rotate counterclockwise, the rotation of the blades 42 cuts the air to form a pressure difference, which drives the airflow to move from bottom to top. That is, the airflow is drawn in through the first air hole 121 at the bottom and then delivered to each purging hole 33 through the rod slot. The whole assembly does not require power control and is more energy-efficient.

[0052] like Figure 3 , Figure 5 , Figure 7 , Figure 8 As shown, the wind cup 53 and the cup rod 52 are rotatably connected by multiple ceramic bearings. When the wind force is small, the wind cup 53 hangs down under its own weight, thereby reducing the wind force on the wind cup 53, thus preventing the insulator 30 from rotating, reducing the wear of the ceramic bearings, and increasing the service life of the ceramic bearings. When the wind force is strong enough to blow the wind cup 53, and the wind direction is different, the windward side of the wind cup 53 faces different directions. Thus, by changing the rotation of the wind cup 53, the rotation direction of the insulating rod core 20 is switched (switching between clockwise and counterclockwise rotation).

[0053] By providing a second air hole 34 near the top of the mounting sleeve 41 in the bottom connecting sleeve 32, and a one-way valve 43 installed on the top of the mounting sleeve 41, the one-way valve 43 opens in one direction towards the purge hole 33. Therefore, when the insulator 30 and the purge assembly 40 rotate clockwise, the one-way valve 43 closes. At this time, the purge assembly 40 can only draw in gas through the second air hole 34. This avoids the problem of water stains being drawn back into the second air hole 34 when the purge assembly 40 rotates clockwise. Then, airflow is drawn in through the third air hole 421, which is provided by the mounting sleeve 41 and corresponds to the second air hole 34 and has a filter screen. Then, the debris adsorbed by the first air hole 121 with the filter screen is back-blown and cleaned to ensure normal gas flow in the first air hole 121.

[0054] At the same time, when the blowing assembly 40 rotates counterclockwise, part of the airflow is blown through the third air hole 421 toward the second air hole 34 with the filter screen, so as to back-blow and clean the filter screen of the second air hole 34.

[0055] Furthermore, through the back-flushing self-cleaning of the filter screen, while the filter screen intercepts dust, it can also ensure the airflow of the first air hole 121, thus avoiding the inhalation of a large amount of dust without manual intervention, and at the same time, it can complete the self-cleaning of the filter screen.

[0056] like Figure 3 , Figure 5 As shown, the one-way valve 43 includes an annular plate 431 that is coaxially fixed to the top of the mounting sleeve 41, and the inner diameter of the annular plate 431 is adapted to the outer diameter of the insulating rod core 20.

[0057] The ring plate 431 has multiple sets of annularly distributed valve holes 432. Each set of valve holes 432 is fixedly installed with a rubber sheet 433. The center of the rubber sheet 433 is fixed to the upper surface of the ring plate 431 by a fixing rod and is located at the center of each set of valve holes 432. At the same time, the outer diameter of the rubber sheet 433 is larger than the outer diameter of each set of valve holes 432. Therefore, when the rubber sheet 433 is attached to the ring plate 431, the valve hole 432 is blocked. When the airflow moves from bottom to top through the bottom of the ring plate 431, the rubber sheet 433 is lifted up to ensure the normal flow of airflow.

[0058] like Figure 2 , Figure 7 , Figure 8 As shown, a sleeve 532 is fixed on one side of the wind cup 53, and the sleeve 532 is rotatably connected to the cup rod 52 through a ceramic bearing. Two limiting blocks 533 are symmetrically fixed on the sleeve 532, and the two limiting blocks 533 are distributed on the axis perpendicular to the wind cup 53.

[0059] Meanwhile, a limiting rod 521 is fixed on the cup rod 52 and placed between two limiting blocks 533. Therefore, when the wind cup 53 is blown by the wind and rotates, the limiting block 533 and the limiting rod 521 are used to abut against each other to prevent the wind cup 53 from rotating excessively and causing the wind cup 53 to rotate around the cup rod 52.

[0060] like Figure 3 As shown, the blow hole 33 is inclinedly opened on the connecting sleeve 32 and parallel to the upper surface of the umbrella skirt 31, so that the airflow blown out by the blow hole 33 can adhere to the upper surface of the umbrella skirt 31 for blowing, thereby improving the blowing effect on the surface of the umbrella skirt 31.

[0061] like Figure 2 , Figure 4 As shown, an insulating cover 21 is fixedly installed on the top of the insulating pole core 20, and a top connecting sleeve 32 is fitted inside the insulating cover 21 to protect the top of the connecting sleeve 32 and prevent rainwater from entering through the top of the pole seam. The top of the insulating cover 21 has a reserved vertical groove for cable fixing, and the lower surface of the insulating cover 21 is in contact with the top umbrella skirt 31 to reduce water seepage.

[0062] like Figure 8 , Figure 9 As shown, the wind cup 53 has a frustum-shaped structure, and the sleeve 532 is fixed to the large-diameter side of the wind cup 53 to ensure that the wind cup 53 will naturally rotate under the action of gravity in the windless state, so that the large-diameter side faces upward, and drain water through the drain hole 531 opened at the bottom of the wind cup 53 to avoid the problem of water accumulation in the wind cup 53 during rainy weather.

[0063] like Figure 9 As shown, the mounting base 10 includes a flange 11 to fix the whole to the pole frame of the utility pole through the flange 11. A riser 12 is fixedly installed on the upper flange 11. A first air hole 121 is opened on the riser 12 and is located below the ceramic bearing at the bottom to ensure normal airflow.

[0064] Working principle: When the wind speed is sufficient to make the wind cup 53 rotate, and the wind cup 53 drives the cup rod 52 to rotate counterclockwise (e.g. Figure 9 (As shown), at the same time, the wind cup 53 drives the connecting sleeve 32 and the umbrella skirt 31 to rotate counterclockwise, and also drives the mounting sleeve 41 and the blade 42 to rotate counterclockwise.

[0065] As the umbrella skirt 31 rotates counterclockwise, it is thrown off the rainwater and / or dust on its surface by centrifugal force. At the same time, when the blade 42 rotates at high speed, the airflow is filtered through the filter screen of the first air hole 121 and then drawn into the rod slot. Then, the rotation of the blade 42 causes the airflow to push the rubber sheet 433 away, and finally blow it onto the surface of the umbrella skirt 31 through the blow hole 33.

[0066] When the drooping cup 53 is blown by the wind, and the wind direction causes the cup 53 to rotate, the cup 53 drives the stem 52 to rotate clockwise (e.g., Figure 10 (as shown);

[0067] When the wind cup 53 rotates clockwise, driving the connecting sleeve 32 and the umbrella skirt 31 to rotate clockwise, the umbrella skirt 31 can still rely on centrifugal force to throw away rainwater. At the same time, when the blade 42 rotates clockwise at high speed, the airflow flows from top to bottom. That is, the airflow enters through the third air hole 421 and the second air hole 34, and flows out from the first air hole 121 to back-blow and clean the filter screen in the first air hole 121. At the same time, the rubber sheet 433 blocks the valve hole 432.

[0068] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A post insulator, characterized in that: Includes a mounting base (10), on which an insulating rod core (20) is fixed. The insulating rod core (20) is coaxially sleeved and rotatably connected to an insulator (30). The insulator (30) includes multiple umbrella skirts (31). The multiple umbrella skirts (31) are integrally connected by a connecting sleeve (32). The connecting sleeve (32) has multiple blowing holes (33) for blowing the umbrella skirts (31). The bottom connecting sleeve (32) is fixed with a purge assembly (40) for providing airflow to the purge hole (33), and the mounting base (10) is provided with a plurality of first air holes (121) for the purge assembly (40) to draw in air; The bottom connecting sleeve (32) is fixed with a drive assembly (50); The insulator (30) is driven by the drive assembly (50) to rotate centrifugally, and water stains and / or dust on the surface of the umbrella skirt (31) are removed by centrifugation; The airflow generated by the blowing assembly (40) driven by the driving assembly (50) is delivered to the blowing hole (33). The airflow blows the surface of the centrifugally rotating umbrella skirt (31) through the blowing hole (33) and forms an air barrier.

2. A post insulator according to claim 1, characterized in that, The drive assembly (50) includes a collar (51) adapted to the outer diameter of the connecting sleeve (32), and a plurality of cup rods (52) are distributed in a ring on the collar (51). A wind cup (53) is installed at the end of the cup rod (52) away from the collar (51). The purging assembly (40) includes a mounting sleeve (41) adapted to the inner diameter of the connecting sleeve (32), and a plurality of annularly distributed blades (42) are fixed on the inner wall of the mounting sleeve (41).

3. A post insulator according to claim 2, characterized in that, The wind cup (53) is rotatably connected to the cup rod (52); The bottom connecting sleeve (32) has a second vent (34) near the top of the mounting sleeve (41); The mounting sleeve (41) has a third vent (421) corresponding to the second vent (34); Both the first air hole (121) and the third air hole (421) are equipped with filter screens; The top of the mounting sleeve (41) is equipped with a one-way valve (43), which opens in one direction toward the purge hole (33).

4. A post insulator according to claim 3, characterized in that, The one-way valve (43) includes an annular plate (431) coaxially fixed to the top of the mounting sleeve (41), the inner diameter of the annular plate (431) being adapted to the outer diameter of the insulating rod core (20); The ring plate (431) has multiple sets of annularly distributed valve holes (432), and each set of valve holes (432) is fixedly installed with a rubber sheet (433). The outer diameter of the rubber sheet (433) is larger than the outer diameter of each set of valve holes (432).

5. A post insulator according to claim 2, characterized in that, A sleeve (532) is fixed on one side of the wind cup (53). The sleeve (532) is rotatably connected to the cup rod (52). Two limiting blocks (533) are symmetrically fixed on the sleeve (532). A limiting rod (521) is fixed on the cup rod (52) and placed between the two limiting blocks (533).

6. A post insulator according to claim 1, characterized in that, The purge hole (33) is parallel to the upper surface of the umbrella skirt (31).

7. A post insulator according to claim 1, characterized in that, An insulating cover (21) is fixedly installed on the top of the insulating rod core (20), and the connecting sleeve (32) on the top is fitted inside the insulating cover (21). The lower surface of the insulating cover (21) is in contact with the umbrella skirt (31) on the top.

8. A post insulator according to claim 2, characterized in that, The wind cup (53) has a frustum-shaped structure, and a drain hole (531) is provided at the bottom of the wind cup (53).

9. A post insulator according to claim 1, characterized in that, The mounting base (10) includes a flange (11), on which a riser (12) is fixedly mounted, and the first air hole (121) is opened on the riser (12).

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