阅读说明：本技术 一种特高压输电线路用三联耐脏绝缘子 (Triple dirt-resistant insulator for ultra-high voltage transmission line ) 是由 李聪聪 王宁 于 2021-05-13 设计创作，主要内容包括：本发明涉及绝缘子技术领域,具体为一种特高压输电线路用三联耐脏绝缘子,包括上金具和下金具,所述上金具和下金具之间连接有安装杆,所述安装杆上可拆卸地套接有多个自清理伞裙,每个所述自清理伞裙均包括伞裙本体,所述伞裙本体的顶端设有顶套,所述伞裙本体和顶套上共同设有与安装杆适配的套孔,所述顶套的外侧转动套设有旋转环。本发明通过对绝缘子上的每个伞裙可拆卸安装,能够根据需要增加或减少伞裙的数量,显著提高了绝缘子的灵活性,有助于提高其使用性能,同时还降低了生产模具的支出成本,当受到风力吹拂时,风扇片会带动旋转环旋转,使得清扫刷对伞裙表面进行刮刷,提高了绝缘子的自清理能力,绝缘子的抗污染性能也显著提高。(The invention relates to the technical field of insulators, in particular to a triple dirt-resistant insulator for an extra-high voltage transmission line, which comprises an upper hardware fitting and a lower hardware fitting, wherein an installation rod is connected between the upper hardware fitting and the lower hardware fitting, a plurality of self-cleaning umbrella skirts are detachably sleeved on the installation rod, each self-cleaning umbrella skirt comprises an umbrella skirt body, a top sleeve is arranged at the top end of each umbrella skirt body, sleeve holes matched with the installation rod are jointly formed in the umbrella skirt bodies and the top sleeves, and a rotating ring is rotatably sleeved on the outer side of each top sleeve. According to the invention, each shed on the insulator can be detachably mounted, the number of sheds can be increased or reduced as required, the flexibility of the insulator is obviously improved, the use performance of the insulator is improved, the expenditure cost of a production mold is reduced, and when the insulator is blown by wind power, the fan sheet can drive the rotating ring to rotate, so that the cleaning brush scrapes the surface of the sheds, the self-cleaning capability of the insulator is improved, and the anti-pollution performance of the insulator is also obviously improved.)

1. The utility model provides a dirt resistant insulator of trigeminy for extra-high voltage transmission line, includes gold utensil (1) and lower gold utensil (3), its characterized in that: go up and be connected with installation pole (2) between gold utensil (1) and lower gold utensil (3), detachably cup joints a plurality of self-cleaning full skirts on installation pole (2), every self-cleaning full skirt all includes full skirt body (4), the top of full skirt body (4) is equipped with top cover (5), be equipped with on full skirt body (4) and top cover (5) trepanning (10) with installation pole (2) adaptation jointly, the outside of top cover (5) is rotated the cover and is equipped with rotatory ring (6), evenly install a plurality of fan pieces (7) on the outer wall of rotatory ring (6), swing joint has cleaning brush (8) on the outer wall of rotatory ring (6), cleaning brush (8) laminating is on the surface of full skirt body (4).

2. The triple dirt-resistant insulator for the extra-high voltage transmission line according to claim 1, characterized in that: the outer wall of the mounting rod (2) is provided with a limiting strip (9), and the inner wall of the trepanning (10) is provided with a positioning groove (11) matched with the limiting strip (9).

3. The triple dirt-resistant insulator for the extra-high voltage transmission line according to claim 1, characterized in that: fixed slot (14) have been seted up to the bottom of installation pole (2), jack (15) have been seted up on the roof of fixed slot (14), evenly set up a plurality of transverse grooves with the outside intercommunication of installation pole (2), every on the inner wall of jack (15) the equal elastic mounting in transverse groove has fixture block (16), every fixture block (16) have all seted up the bevel connection towards the one end of jack (15), and bevel connection towards below, every draw-in groove (19) of fixture block (16) adaptation are all seted up on the inner wall of trepanning (10).

4. The triple dirt-resistant insulator for the extra-high voltage transmission line according to claim 3, characterized in that: the top of lower fitting (3) is connected with fixing base (12), the top of fixing base (12) is connected with inserted bar (13) with jack (15) adaptation, fixing base (12) and fixed slot (14) screw-thread fit.

5. The triple dirt-resistant insulator for the extra-high voltage transmission line according to claim 3, characterized in that: an elastic sheet groove (17) is formed in the top wall of each transverse groove, a reset elastic sheet (18) fixedly connected with the clamping block (16) is mounted on the inner wall of each elastic sheet groove (17), and the clamping blocks (16) are all located in the transverse grooves in a natural state.

6. The triple dirt-resistant insulator for the extra-high voltage transmission line according to claim 1, characterized in that: the cleaning brush is characterized in that a movable groove (20) is vertically formed in the outer wall of the bottom side of the rotating ring (6), a movable block (23) is arranged in the movable groove (20), a connecting cylinder (21) is arranged at the end part of the movable block (23), the connecting cylinder (21) is detachably connected with the cleaning brush (8), a top spring (22) is connected between the top wall of the movable groove (20) and the movable block (23), sliding blocks are arranged on two sides of the movable block (23), and sliding grooves matched with the sliding blocks are formed in the inner wall of the movable groove (20).

7. The triple dirt-resistant insulator for the extra-high voltage transmission line according to claim 6, characterized in that: the tail end of the cleaning brush (8) is rotatably sleeved with a threaded sleeve (24), the threaded sleeve (24) is in threaded connection with the connecting cylinder (21), a bump is arranged on the outer wall of the tail end of the cleaning brush (8), and a groove matched with the bump is formed in the inner wall of the connecting cylinder (21).

Technical Field

The invention relates to the technical field of insulators, in particular to a triple dirt-resistant insulator for an extra-high voltage transmission line.

Background

The insulator is a special insulating control and can play an important role in an overhead transmission line. Insulators are various in types and shapes. Although the structures and the shapes of different types of insulators are greatly different, the insulators are composed of two parts, namely an insulating part and a connecting hardware fitting. The pollution-resistant insulator is mainly characterized in that a measure of increasing or enlarging an insulator shed or an insulator edge is adopted to increase the creepage distance of the insulator so as to improve the electrical strength of the insulator in a dirty state. Meanwhile, the shape of the umbrella skirt structure is changed to reduce the natural dirt accumulation on the surface, so that the dirt flashover resistance of the insulator is improved.

The prior patent (publication number: CN108899141B) is a stain-resistant porcelain insulator, which comprises an insulator main body, wherein an upper hardware fitting is arranged at the top of the insulator main body, a lower hardware fitting is arranged at the bottom of the insulator main body, a fixed block is arranged at the top of the upper hardware fitting, an annular groove is arranged at the upper part of the outer surface of the fixed block, vertical grooves are arranged on two sides of the fixed block, a first fixed box is fixedly connected to the bottom of the lower hardware fitting, and a second fixed box is fixedly connected to the top of the inner wall of the first fixed box.

In the process of implementing the above invention, the inventor finds that at least the following problems in the prior art are not solved:

1. the creepage distance of the insulator is increased by arranging the umbrella skirts, but the existing insulators are generally integrally formed, the number of the umbrella skirts cannot be increased at will according to the use requirement, the flexibility is low, and each insulator needs to be provided with a corresponding die, so that more inconvenience is caused;

2. the invention realizes the purpose of cleaning dust by blowing the surface of the insulator with airflow, but in practical use, the cleaning capability of the airflow is limited, dust is easy to attach to the surface of the insulator and is difficult to blow away, and the pollution flashover resistance of the insulator is not ideal.

Therefore, a triple dirt-resistant insulator for the extra-high voltage transmission line is provided.

Disclosure of Invention

The invention aims to provide a triple dirt-resistant insulator for an extra-high voltage transmission line, each umbrella skirt on the insulator can be detachably mounted, the number of the umbrella skirts can be increased or reduced according to needs, the flexibility of the insulator is obviously improved, the usability of the insulator is improved, the expenditure cost of a production mold is reduced, and when the insulator is blown by wind power, a fan blade can drive a rotating ring to rotate, so that a cleaning brush scrapes the surfaces of the umbrella skirts, the self-cleaning capability of the insulator is improved, and the pollution resistance of the insulator is also obviously improved.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a dirt-resistant insulator of trigeminy for extra-high voltage transmission line, includes gold utensil and lower gold utensil, it is connected with the installation pole to go up between gold utensil and the lower gold utensil, detachably has cup jointed a plurality of self-cleaning full skirts on the installation pole, every self-cleaning full skirt all includes the full skirt body, the top of full skirt body is equipped with the top cover, be equipped with the trepanning with the installation pole adaptation on full skirt body and the top cover jointly, the outside of top cover is rotated the cover and is equipped with rotatory ring, evenly install a plurality of fan pieces on rotatory ring's the outer wall, swing joint has the brush cleaner on rotatory ring's the outer wall, the brush cleaner laminating is on the surface of full skirt body.

Through the technical scheme above the adoption, make every all can the suit on the installation pole from the clearance full skirt, consequently can increase and decrease the quantity of full skirt on the insulator in a flexible way, can adapt to different user demands, the flexibility is showing and is improving, facilitate the use more, rotatory ring rotationally installs on the top cap, when the fan piece receives wind-force and blows, rotatory ring receives the drive of fan piece and takes place rotatoryly, it scrapes the brush to drive the surface of full skirt to drive the brush cleaner on the rotatory ring, get rid of the dust on full skirt surface, the clearance effect is better for the mode that utilizes the air current to blow the ash, show the cleanliness factor that has improved the insulator surface, thereby the anti-soil of insulator dodges the performance.

Preferably, the outer wall of the installation rod is provided with a limiting strip, and the inner wall of the trepanning is provided with a positioning groove matched with the limiting strip.

Through adopting above technical scheme for when will self-cleaning umbrella skirt cover to the installation pole, through the fixed angle of self-cleaning umbrella skirt of the cooperation of spacing and constant head tank, convenient follow-up fixes self-cleaning umbrella skirt, has improved the degree of convenience when installing self-cleaning umbrella skirt.

Preferably, the fixed slot has been seted up to the bottom of installation pole, the jack has been seted up on the roof of fixed slot, evenly set up a plurality of cross slots that communicate with the outside of installation pole on the inner wall of jack, every equal elastic mounting has the fixture block in the cross slot, every the oblique mouth has all been seted up towards the one end of jack to the fixture block, and the oblique mouth is towards below, every the draw-in groove of fixture block adaptation has all been seted up on the inner wall of trepanning.

Preferably, the top of gold utensil is connected with the fixing base down, the top of fixing base is connected with the inserted bar, fixing base and fixed slot screw-thread fit.

Through the technical scheme above the adoption, when needs equipment insulator, will be from clearing up the full skirt cover to the installation pole on and with its position adjustment, then insert the inserted bar from the bottom of installation pole, because the downward bevel connection has all been seted up to the medial extremity of every fixture block, consequently can be ejecting the fixture block outside gradually when the inserted bar upwards inserts, the fixture block enters into the draw-in groove of trepanning in with the position and the angle fixation of full skirt, the installation to the full skirt has been accomplished promptly, rotatory fixing base this moment makes it be connected to in the fixed slot can. When the umbrella skirt needs to be disassembled, the inserting rod is gradually moved out of the inserting hole by reversely rotating the fixing seat, the clamping block can be moved out of the clamping groove, and at the moment, each umbrella skirt can be taken down. The structure is ingenious, and it is convenient to use, can accomplish the fixed of full skirt fast and install to stability is good, and convenient the dismantlement, work efficiency when having improved the equipment insulator.

Preferably, each spring sheet groove is formed in the top wall of each transverse groove, each reset spring sheet fixedly connected with the corresponding fixture block is installed on the inner wall of each spring sheet groove, and the fixture blocks are all located in the transverse grooves in a natural state.

Through the technical scheme above the adoption for when the fixture block receives the extrusion of inserted bar, the fixture block is extruded the horizontal groove and is outwards stretched out, takes out from the jack when the inserted bar, receives the power that resets of shell fragment, and in the fixture block returned the horizontal groove, make when dismantling the full skirt more convenient and stable, and then convenience and work efficiency when improving the use.

Preferably, a movable groove is vertically formed in the outer wall of the bottom side of the rotating ring, a movable block is arranged in the movable groove, a connecting cylinder is arranged at the end of the movable block and detachably connected with the cleaning brush, a top spring is connected between the top wall of the movable groove and the movable block, sliding blocks are arranged on two sides of the movable block, and sliding grooves matched with the sliding blocks are formed in the inner wall of the movable groove.

Through the technical scheme above adopting for the brush cleaner is connected on the movable block, and the movable block can be in the activity inslot activity from top to bottom, and the top of movable block is connected with the top spring simultaneously, and the top spring can exert pressure to the movable block all the time, guarantees the brush dynamics of scraping and the clearance effect of brush cleaner, and the movable block can not break away from the movable groove so that the setting of slider and spout makes it can be in the activity inslot activity steadily, has improved the stability of insulator during operation.

Preferably, the tail end of the cleaning brush is rotatably sleeved with a threaded sleeve, the threaded sleeve is in threaded connection with the connecting cylinder, a bump is arranged on the outer wall of the tail end of the cleaning brush, and a groove matched with the bump is formed in the inner wall of the connecting cylinder.

Through adopting above technical scheme for when needing to change the brush cleaner, rotatable threaded sleeve makes the tail end of brush cleaner shift out the connecting cylinder gradually, then during the installation the tail end of brush cleaner insert in the connecting cylinder and rotatory threaded sleeve make it screw gradually on the connecting cylinder outer wall can, the cooperation of lug and recess makes the angle of brush cleaner can remain stable, can not take place to deflect when the installation, and then guarantees that the brush cleaner is in suitable angle, makes it have stable clearance effect.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, each shed on the insulator can be detachably mounted, the number of sheds can be increased or reduced as required, each shed is fixed by the inserted rod connected with the lower hardware fitting and the fixture block in the mounting rod, the operation is convenient and rapid, the flexibility of the insulator is obviously improved, the use performance of the insulator is improved, and the expenditure cost of a production mold is reduced.

2. Set up rotatory ring on every full skirt, set up fan piece and brush cleaner on the rotatory ring, when receiving wind-force to blow, the fan piece can drive rotatory ring rotatory for the brush cleaner scrapes the brush to the full skirt surface, is showing the self-cleaning ability that has improved the insulator, compares in the mode effect that relies on the air current to blow the ash better, and the antipollution performance of insulator is showing and is improving.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic structural view of the self-cleaning umbrella skirt of the present invention;

FIG. 3 is a cross-sectional view of the bottom structure of the mounting bar of the present invention;

FIG. 4 is a bottom view of the mounting bar of the present invention;

FIG. 5 is an enlarged view of the structure of FIG. 3A in accordance with the present invention;

FIG. 6 is a schematic view of the attachment of the rotating ring and sweeper brush of the present invention;

FIG. 7 is a schematic view of the structure of the sweeper brush of the present invention;

fig. 8 is an enlarged view of the structure of fig. 7 at B according to the present invention.

In the figure: 1. fitting; 2. mounting a rod; 3. placing a hardware fitting; 4. an umbrella skirt body; 5. jacking and sleeving; 6. a rotating ring; 7. a fan blade; 8. cleaning with a brush; 9. a limiting strip; 10. trepanning; 11. positioning a groove; 12. a fixed seat; 13. inserting a rod; 14. fixing grooves; 15. a jack; 16. a clamping block; 17. a spring sheet groove; 18. resetting the elastic sheet; 19. a card slot; 20. a movable groove; 21. a connecting cylinder; 22. a spring is supported; 23. a movable block; 24. a threaded sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the invention provides a triple dirt-resistant insulator for an ultra-high voltage transmission line, which has the following technical scheme:

the utility model provides a dirt-resistant insulator of trigeminy for extra-high voltage transmission line, includes that gold utensil 1 and lower gold utensil 3 are connected with installation pole 2 between last gold utensil 1 and the lower gold utensil 3, and detachably has cup jointed a plurality of self-cleaning full skirts on the installation pole 2, and every self-cleaning full skirt all includes full skirt body 4, and the top of full skirt body 4 is equipped with top cover 5, is equipped with the trepanning 10 with installation pole 2 adaptation on full skirt body 4 and the top cover 5 jointly. Every self-cleaning umbrella skirt all can be overlapped on installation pole 2, consequently can increase and decrease the quantity of umbrella skirt on the insulator in a flexible way, can adapt to different user demands, and the flexibility is showing and is improving, facilitates the use more.

Referring to fig. 1 and 2, as an embodiment of the present invention, a limiting strip 9 is disposed on an outer wall of the mounting rod 2, and a positioning groove 11 adapted to the limiting strip 9 is disposed on an inner wall of the trepanning 10. When will self-cleaning umbrella skirt cover to installation pole 2 on, through the fixed angle of self-cleaning umbrella skirt of the cooperation of spacing 9 and constant head tank 11, convenient follow-up fixes self-cleaning umbrella skirt, has improved the degree of convenience when installing self-cleaning umbrella skirt.

As an embodiment of the present invention, referring to fig. 3, a fixing groove 14 is formed at the bottom end of the mounting rod 2, an insertion hole 15 is formed on the top wall of the fixing groove 14, a plurality of transverse grooves communicated with the outer side of the mounting rod 2 are uniformly formed on the inner wall of the insertion hole 15, a fixture block 16 is elastically installed in each transverse groove, an inclined opening is formed at one end of each fixture block 16 facing the insertion hole 15, the inclined opening faces downward, and a clamping groove 19 adapted to the fixture block 16 is formed on the inner wall of each trepanning 10.

Further, the top of lower gold utensil 3 is connected with fixing base 12, and the top of fixing base 12 is connected with inserted bar 13 with jack 15 adaptation, and fixing base 12 and fixed slot 14 screw-thread fit.

When the insulator needs to be assembled, the self-cleaning umbrella skirt is sleeved on the mounting rod 2 and the position of the self-cleaning umbrella skirt is adjusted, then the inserting rod 13 is inserted into the bottom end of the mounting rod 2, and the downward inclined opening is formed in the inner side end of each clamping block 16, so that the clamping blocks 16 are gradually ejected outwards when the inserting rod 13 is inserted upwards, the clamping blocks 16 enter the clamping grooves 19 in the sleeve holes 10 to fix the position and the angle of the umbrella skirt, the installation of the umbrella skirt is completed, and at the moment, the fixing seat 12 is rotated to enable the umbrella skirt to be connected into the fixing grooves 14. When the umbrella skirt needs to be detached, the fixing seat 12 is rotated reversely to enable the inserting rod 13 to gradually move out of the inserting hole 15, the clamping block 16 can move out of the clamping groove 19, and at the moment, each umbrella skirt can be taken down. The structure is ingenious, and it is convenient to use, can accomplish the fixed of full skirt fast and install to stability is good, and convenient the dismantlement, work efficiency when having improved the equipment insulator.

Referring to fig. 5, as an embodiment of the present invention, a spring sheet groove 17 is formed on a top wall of each transverse groove, a reset spring sheet 18 fixedly connected with the latch 16 is mounted on an inner wall of each spring sheet groove 17, and the latch 16 is completely located in the transverse groove in a natural state.

When the fixture block 16 is extruded by the inserting rod 13, the fixture block 16 is extruded out of the transverse groove and extends outwards, when the inserting rod 13 is pulled out of the jack 15, the fixture block 16 returns into the transverse groove under the reset force of the reset elastic sheet 18, so that the umbrella skirt is more convenient and stable to disassemble, and the convenience and the working efficiency in use are further improved.

The outside of top cover 5 is rotated the cover and is equipped with rotatory ring 6, evenly installs a plurality of fan blades 7 on rotatory ring 6's the outer wall, and swing joint has cleaning brush 8 on rotatory ring 6's the outer wall, and cleaning brush 8 laminating is on the surface of full skirt body 4.

Rotatory ring 6 rotationally installs on top cover 5, when fan blade 7 receives wind-force to blow, rotatory ring 6 receives the drive of fan blade 7 and takes place rotatoryly, drives the brush cleaner 8 on rotatory ring 6 and scrapes the brush to the surface of full skirt, gets rid of the dust on full skirt surface, and the clearance effect is better for utilizing the mode that the air current blown the ash, is showing the cleanliness factor that has improved insulator surface to the anti-soil of insulator dodges the performance.

Referring to fig. 6, as an embodiment of the present invention, a movable groove 20 is vertically formed on an outer wall of a bottom side of a rotating ring 6, a movable block 23 is disposed in the movable groove 20, a connecting cylinder 21 is disposed at an end of the movable block 23, the connecting cylinder 21 is detachably connected to a cleaning brush 8, a top spring 22 is connected between a top wall of the movable groove 20 and the movable block 23, sliders are disposed on both sides of the movable block 23, and a sliding groove adapted to the sliders is formed on an inner wall of the movable groove 20.

The cleaning brush 8 is connected on the movable block 23, the movable block 23 can move up and down in the movable groove 20, simultaneously the top of the movable block 23 is connected with a top spring 22, the top spring 22 can exert pressure on the movable block 23 all the time, the brush scraping force and the cleaning effect of the cleaning brush 8 are guaranteed, the movable block 23 can not be separated from the movable groove 20 due to the arrangement of the sliding block and the sliding groove, the cleaning brush can stably move in the movable groove 20, and the stability of the insulator during operation is improved.

Referring to fig. 8, as an embodiment of the present invention, a threaded sleeve 24 is rotatably sleeved at the tail end of the cleaning brush 8, the threaded sleeve 24 is in threaded connection with the connecting cylinder 21, a bump is arranged on the outer wall of the tail end of the cleaning brush 8, and a groove adapted to the bump is arranged on the inner wall of the connecting cylinder 21.

When the cleaning brush 8 needs to be replaced, the tail end of the cleaning brush 8 is gradually moved out of the connecting cylinder 21 by the aid of the rotatable threaded sleeve 24, the tail end of the cleaning brush 8 is inserted into the connecting cylinder 21 during installation, the threaded sleeve 24 is rotated to enable the cleaning brush to be gradually screwed onto the outer wall of the connecting cylinder 21, the angle of the cleaning brush 8 can be kept stable by the aid of matching of the convex blocks and the grooves, deflection can not occur during installation, the cleaning brush 8 is further guaranteed to be in a proper angle, and the cleaning brush has a stable cleaning effect.

The working principle is as follows: when the insulator that satisfies the user demand is assembled to needs, the self-cleaning umbrella skirt of required quantity overlaps in proper order on installation pole 2 and with its position adjustment, then insert inserted bar 13 from the bottom of installation pole 2, because the downward bevel connection has all been seted up to the medial extremity of every fixture block 16, consequently inserted bar 13 can be gradually ejecting outside fixture block 16 when upwards inserting, fixture block 16 enters into draw-in groove 19 in trepanning 10, with the position and the angle fixed of umbrella skirt, rotatory fixing base 12 makes it be connected to and accomplished the installation to the umbrella skirt in the fixed slot 14 this moment. When receiving wind-force to blow, rotatory ring 6 receives the drive of fan piece 7 to take place to rotate, and the brush 8 of cleaning on the rotatory ring 6 scrapes the brush to the surface of full skirt, gets rid of the dust on full skirt surface, keeps the cleanliness factor on insulator surface, improves its anti-soil flashover performance. If the cleaning brush 8 needs to be replaced, the threaded sleeve 24 is rotated to be separated from the connecting cylinder 21, and then a new cleaning brush 8 can be replaced quickly and conveniently.

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