Electric power insulator with protection structure at edge

Abstract

The invention discloses a power insulator with a protection structure at the edge, and the power insulator comprises a plurality of groups of ceramic insulators, the outer end of each ceramic insulator is provided with a protection assembly, and the center of each ceramic insulator is provided with a slot. An upper resin rod and a lower resin rod are respectively inserted into the slots at the two ends of the plurality of groups of ceramic insulators, a middle resin rod is inserted into the slot between the upper resin rod and the lower resin rod, fixed seats are fixedly mounted at the separated ends of the upper resin rod and the lower resin rod, and a fastening assembly is arranged on one side of each fixed seat. The flashover phenomenon of discharge breakdown occurs between the adjacent ceramic insulators, the protection assembly can effectively protect the edges of the ceramic insulators, damage caused by overlarge stress at the edges is avoided, the sunken sealing grooves and the umbrella-shaped faces of the ceramic insulators form transitional umbrella skirt-shaped cambered surfaces after being matched with the upper sheath, and therefore the sealing effect of the ceramic insulators is improved. Therefore, water drops cannot gather on the surface and can quickly flow away to reduce the conductivity, and the safety is improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a power insulator with a protective structure at its edge. Background Technology

[0002] An insulator is a special type of insulating control that plays a vital role in overhead power transmission lines. In the early days, insulators were mostly used on utility poles. Gradually, they evolved to be used on one end of high-voltage power transmission towers, where many disc-shaped insulators are hung to increase the creepage distance. They are usually made of glass or ceramic and are called insulators. They are devices installed between conductors at different potentials or between conductors and grounding components, capable of withstanding voltage and mechanical stress. There are many types of insulators with different shapes. Although the structure and appearance of different types of insulators vary greatly, they are all composed of two main parts: insulating components and connecting hardware.

[0003] Existing power insulators occasionally experience discharge or flashover during operation, with the edges being particularly vulnerable and easily broken down, requiring complete replacement. This results in high costs, and the overall installation and disassembly are inconvenient and difficult, requiring removal and installation from the high-voltage lines at both ends, making the entire maintenance process very lengthy, time-consuming, and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by providing an electrical insulator with a protective structure at the edge.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A power insulator with a protective structure at its edge includes a ceramic insulator. The outer end of the ceramic insulator is provided with a protective component, and the center of the ceramic insulator has a slot. Several groups of ceramic insulators are provided. An upper resin rod and a lower resin rod are respectively inserted into the slots at both ends of each group of ceramic insulators. A middle resin rod is inserted into the slot between the upper and lower resin rods. Fixing seats are fixedly installed at the disjoint ends of the upper and lower resin rods. A fastening component is provided on one side of each fixing seat. A retaining bracket is installed at one end of each of the middle and lower resin rods. A limiting component is provided in the retaining bracket. Two sets of limiting grooves are symmetrically formed on the outer ends of one end of each of the upper and middle resin rods.

[0006] Preferably, the protective assembly includes an upper sheath, a lower sheath, and a skirt rubber sleeve. The ceramic insulator has an umbrella-shaped structure with an umbrella end and a handle end, and a ring-shaped sealing groove is provided around the outer periphery of the ceramic insulator. The upper and lower sheaths are fitted to the two sides of the umbrella end of the ceramic insulator, and the upper sheath is installed outside the sealing groove. One side of the lower sheath is fixedly connected to the skirt rubber sleeve, and the skirt rubber sleeve is fitted onto the outer wall of the handle end of the ceramic insulator. A number of sets of locking blocks are provided circumferentially on one side wall of the upper sheath, and a ring of locking grooves that engage with the locking blocks are provided circumferentially on the lower sheath.

[0007] Preferably, the fastening assembly includes a clamp, a limiting seat, a rotating seat, a rotating rod, a threaded guide rod, a nut clamp, and a swing seat. The fixed seat has an arc-shaped fixing groove at its center. The swing seat is fixedly installed on one side of the clamp, the rotating seat is rotatably connected to the other side of the clamp, and the swing seat is rotatably connected to one side of the fixed seat. The limiting seat is fixedly installed on the outer wall of the other side of the fixed seat. The rotating rod is fixedly installed on the rotating seat. One end of the threaded guide rod is rotatably connected to the outer end of the rotating rod, and the nut clamp is threadedly connected to the other end of the threaded guide rod.

[0008] Preferably, the limiting component includes a pull block, a guide rod, an insert block, a fixing ring, and a spring. The card seat has a positioning groove at its center, and two sets of guide grooves are symmetrically arranged in the positioning groove. The guide rod is slidably disposed in the guide groove, and both ends of the guide rod are fixedly connected to the pull block and the insert block, respectively. The fixing ring is fixedly installed on the outer end of the guide rod. The spring is sleeved on the outer end of the guide rod, and both ends of the spring are fixedly connected to the opposite surfaces of the guide groove and the fixing ring, respectively.

[0009] Preferably, the outer surface of the insert block extends obliquely toward the center of the positioning groove from the outside to the inside, and two sets of pull grooves are symmetrically provided on the pull block.

[0010] Preferably, the limiting seat is provided with a locking groove, two sets of torsion plates are symmetrically installed on the outer wall of the nut clamp, and the clamp and the fixed seat have an arc-shaped structure on the opposite side.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. During operation, flashover phenomena such as discharge breakdown may occur between adjacent ceramic insulators. The protective components can effectively protect the edges of the ceramic insulators, preventing damage caused by excessive stress at the edges. The recessed sealing groove, after cooperating with the upper sheath, forms a transitional umbrella-shaped arc surface with the umbrella-shaped surface of the ceramic insulator, so that water droplets will not accumulate on the surface and will flow away quickly, reducing conductivity and increasing safety. At the same time, multiple ceramic insulators and umbrella-shaped rubber sleeves will be added according to the transmission voltage of the high-voltage line. The locking blocks on the upper sheath and the locking slots on the lower sheath are engaged to facilitate the installation and disassembly of both.

[0012] 2. The limiting components and limiting grooves located at both ends of the middle resin rod can be connected and fixed with adjacent limiting grooves and limiting components. The inclined insert blocks allow the resin rod to be driven into the guide groove by squeezing its surface. The number of ceramic insulators and middle resin rods can be increased according to the spacing between high-voltage lines. The pull groove on the pull block facilitates pulling the pull block and has an anti-slip effect. When it is necessary to replace the ceramic insulator, the insert block can be pulled out of the limiting groove through the pull groove on the pull block. At this time, the adjacent ceramic insulators can be separated to facilitate the modular installation and replacement of ceramic insulators. 3. Fastening components are installed at both ends of the device to facilitate installation and disassembly with high-voltage lines, which is convenient for later maintenance. During installation, after placing the high-voltage line in the wire-fixing groove, rotate the rotating seat and the threaded guide rod so that the threaded guide rod passes through the locking groove on the limit seat. The high-voltage line in the clamp seat and wire-fixing groove can be fastened by rotating the nut clamp. During the process, the tightness of the high-voltage line can be adjusted by adjusting the position of the nut clamp on the threaded guide rod. It can also be fixed with high-voltage lines of different specifications. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a power insulator with a protective structure at the edge, as proposed in this invention. Figure 2 This is a front view schematic diagram of a power insulator with a protective structure at the edge, as proposed in this invention. Figure 3 This is a schematic cross-sectional view of a power insulator with a protective structure at the edge, as proposed in this invention. Figure 4 This is an enlarged schematic diagram of structure A of a power insulator with a protective structure at the edge, as proposed in this invention; Figure 5 This is a schematic diagram of a fastening assembly structure in a power insulator with a protective structure at the edge, as proposed in this invention. Figure 6 This is a schematic diagram of the exploded structure of an electrical insulator with a protective structure at the edge, as proposed in this invention.

[0014] In the diagram: 1. Ceramic insulator; 2. Upper sheath; 3. Clamping block; 4. Lower sheath; 5. Umbrella skirt rubber sleeve; 6. Middle resin rod; 71. Fixing seat; 72. Clamping seat; 73. Wire fixing groove; 74. Limiting seat; 75. Rotating seat; 76. Rotating rod; 77. Threaded guide rod; 78. Nut clamp; 79. Swinging seat; 8. Clamping groove; 9. Upper resin rod; 10. Lower resin rod; 11. Clamping seat; 12. Pulling block; 13. Pulling groove; 14. Guide rod; 15. Insertion block; 16. Fixing ring; 17. Spring; 18. Guide groove; 19. Sealing groove; 20. Slot; 21. Limiting groove. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-6 An embodiment of the present invention provides a power insulator with a protective structure at the edge, comprising a ceramic insulator 1, a protective component at the outer end of the ceramic insulator 1, and a slot 20 at the center of the ceramic insulator 1. Several groups of ceramic insulators 1 are provided, with upper resin rods 9 and lower resin rods 10 inserted into the slots 20 at both ends of each group of ceramic insulators 1, and a middle resin rod 6 inserted into the slot 20 between the upper and lower resin rods 9 and 10. Fixing seats 71 are fixedly installed at the disjoint ends of the upper and lower resin rods 9 and 10, and fastening components are provided on one side of the fixing seats 71. A retaining bracket 11 is installed at one end of each of the middle and lower resin rods 6 and 10, and a limiting component is provided in the retaining bracket 11. Two sets of limiting grooves 21 are symmetrically opened at the outer end of the rod body, that is, two sets of limiting grooves 21 are symmetrically opened on the outer wall of the lower end of the upper resin rod 9 and the upper end of the middle resin rod 6. Flashover phenomenon of discharge breakdown may occur between adjacent ceramic insulators 1. The protective component can effectively protect the edge of the ceramic insulator 1 and avoid damage caused by excessive stress at the edge. Fastening components are set at both ends of the device to facilitate installation and disassembly with high voltage lines, which facilitates later maintenance. The limiting components and limiting grooves 21 at both ends of the middle resin rod 6 can be connected and fixed with adjacent limiting grooves 21 and limiting components. In use, the number of ceramic insulators 1 and middle resin rods 6 can be increased according to the spacing between high voltage lines to achieve the purpose of installing power insulators.

[0017] Preferably, two sets of limiting grooves 21 are symmetrically opened on the outer ends of one end of the upper resin rod 9 and the middle resin rod 6, and a retainer 11 is installed on one end of both the middle resin rod 6 and the lower resin rod 10.

[0018] In another preferred embodiment, one end of the upper resin rod 9 is provided with the fixing seat 71, and the other end is provided with the limiting groove 21; one end of the middle resin rod 6 is provided with the card seat 11, and the other end is provided with the limiting groove 21; one end of the lower resin rod 10 is provided with the card seat 11, and the other end is provided with the fixing seat 71.

[0019] Specifically, the protective components include an upper sheath 2, a lower sheath 4, and a shed rubber sleeve 5. The ceramic insulator 1 has an umbrella-shaped structure with an umbrella end and a handle end, and a ring-shaped sealing groove 19 is provided around the outer periphery of the ceramic insulator 1. The upper sheath 2 and the lower sheath 4 are fitted against the two sides of the umbrella end of the ceramic insulator 1, with the upper sheath 2 installed outside the sealing groove 19. One side of the lower sheath 4 is fixedly connected to the shed rubber sleeve 5, and the shed rubber sleeve 5 is fitted onto the outer wall of the handle end of the ceramic insulator 1. Several sets of locking blocks 3 are provided circumferentially on one side wall of the upper sheath 2, and a ring of locking grooves 8 that engage with the locking blocks 3 are provided circumferentially on the lower sheath 4. The sealing groove on the ceramic insulator 1 19 increases the mounting surface support of the upper sheath 2, and the recessed sealing groove 19, after cooperating with the upper sheath 2, forms a transitional umbrella-shaped arc surface with the umbrella-shaped surface of the ceramic insulator 1, so that water droplets will not accumulate on the surface and will flow away quickly, reducing conductivity and increasing safety. At the same time, multiple ceramic insulators 1 and umbrella-shaped rubber sleeves 5 will be added according to the transmission voltage of the high-voltage line. During installation, the umbrella-shaped rubber sleeve 5 can be stretched to fit onto the ceramic insulator 1. After being loosened, the umbrella-shaped rubber sleeve 5 will shrink and fix. At the same time, the locking block 3 on the upper sheath 2 and the locking groove 8 on the lower sheath 4 will engage to fix the upper sheath 2 and the lower sheath 4.

[0020] Specifically, the fastening assembly includes a clamp 72, a limiting seat 74, a rotating seat 75, a rotating rod 76, a threaded guide rod 77, a nut clamp 78, and a swing seat 79. The fixed seat 71 has an arc-shaped wire-fixing groove 73 at its center, meaning the wire-fixing groove 73 is an arc shape adapted to the outer diameter of the high-voltage line. The swing seat 79 is fixedly installed on one side of the clamp 72, the rotating seat 75 is rotatably connected to the other side of the clamp 72, and the swing seat 79 is rotatably connected to one side of the fixed seat 71. The limiting seat 74 is fixedly installed on the outer wall of the other side of the fixed seat 71. The rotating rod 76 is fixedly installed on the rotating seat 75, and the threaded guide rod... One end of 77 is rotatably connected to the outer end of the rotating rod 76, and the nut clamp 78 is threadedly connected to the other end of the threaded guide rod 77. After the high-voltage wire is placed in the wire fixing groove 73, the clamp 72 is rotated to clamp the high-voltage wire, and the rotating seat 75 and the threaded guide rod 77 are rotated so that the threaded guide rod 77 passes through the limiting seat 74. At this time, the high-voltage wire in the clamp 72 and the wire fixing groove 73 can be tightened by rotating the nut clamp 78. The tightness of fixing the high-voltage wire can be adjusted by adjusting the position of the nut clamp 78 on the threaded guide rod 77, and it can be fixed with high-voltage wires of different specifications.

[0021] Specifically, the limiting assembly includes a pull block 12, a guide rod 14, an insert block 15, a fixing ring 16, and a spring 17. A positioning groove is provided in the center of the card holder 11, and two sets of guide grooves 18 are symmetrically arranged in the positioning groove. The guide rod 14 is slidably disposed in the guide groove 18, and both ends of the guide rod 14 are fixedly connected to the pull block 12 and the insert block 15, respectively. The fixing ring 16 is fixedly installed on the outer end of the guide rod 14. The spring 17 is sleeved on the outer end of the guide rod 14, and both ends of the spring 17 are fixedly connected to the opposite surfaces of the guide groove 18 and the fixing ring 16, respectively. When the resin rod is pressed, the insert 15 can be directly squeezed into the guide groove 18. At the same time, the fixing ring 16 compresses the spring 17 to store energy. When the insert 15 is opposite to the limiting groove 21, the energy-stored spring 17 rebounds and squeezes the insert 15 on one side of the fixing ring 16 into the limiting groove 21 to complete the positioning. When it is necessary to replace the ceramic insulator 1, the insert 15 can be pulled out of the limiting groove 21 by the pull block 12. At this time, the adjacent ceramic insulators 1 can be separated to facilitate the modular installation and replacement of the ceramic insulators 1.

[0022] Specifically, the outer surface of the insert block 15 extends obliquely from the outside to the inside of the positioning groove toward the center of the positioning groove, and the pull block 12 is symmetrically provided with two sets of pull grooves 13. The obliquely arranged insert block 15 allows the resin rod to be driven into the guide groove 18 by squeezing its surface. The pull grooves 13 on the pull block 12 facilitate pulling the pull block 12 and play an anti-slip role.

[0023] Specifically, the limiting seat 74 is provided with a locking groove, and two sets of torsion plates are symmetrically installed on the outer wall of the nut clamp 78. The clamp 72 and the fixed seat 71 are opposite to each other in an arc shape. The locking groove on the limiting seat 74 is used for the threaded guide rod 77 to pass through, so that the nut clamp 78 can squeeze the surface of the limiting seat 74 on one side of the locking groove to drive the threaded guide rod 77 to move and drive the clamp 72 to tighten.

[0024] Working principle: During installation, after placing the high-voltage line in the wire-fixing groove 73, rotate the clamp 72 to hold the high-voltage line, and rotate the rotating seat 75 and the threaded guide rod 77 so that the threaded guide rod 77 passes through the locking groove on the limiting seat 74. At this time, the high-voltage line in the clamp 72 and the wire-fixing groove 73 can be tightened by rotating the nut clamp 78. The tightness of fixing the high-voltage line can be adjusted by adjusting the position of the nut clamp 78 on the threaded guide rod 77. It can be fixed with high-voltage lines of different specifications. During operation, flashover phenomenon of discharge breakdown may occur between adjacent ceramic insulators 1. The protection component can effectively protect the ceramic insulation. The edges of the ceramic insulator 1 are designed to prevent excessive stress and damage. Limiting components and limiting grooves 21 are located at both ends of the resin rod 6, allowing for connection and fixation with adjacent limiting grooves 21 and limiting components. During use, the number of ceramic insulators 1 and resin rods 6 can be increased according to the spacing between high-voltage lines to achieve the purpose of installing power insulators. The inclined insertion block 15 allows the resin rod to be driven into the guide groove 18 by pressing its surface. The pull groove 13 on the pull block 12 facilitates pulling the pull block 12 and provides an anti-slip effect. The resin rod can directly press the insertion block 15 to enter the guide groove 18. At the same time, the fixing ring 16 compresses the spring 17 to store energy. When the insert 15 is opposite to the limiting groove 21, the energy-stored spring 17 rebounds and compresses the insert 15 on one side of the fixing ring 16, locking it into the limiting groove 21 to complete the positioning. When it is necessary to replace the ceramic insulator 1, the insert 15 can be pulled out of the limiting groove 21 by the pull block 12. At this time, the adjacent ceramic insulators 1 can be separated to facilitate the modular installation and replacement of the ceramic insulators 1. The sealing groove 19 on the ceramic insulator 1 increases the support surface of the mounting surface of the upper sheath 2, and the sunken sealing groove 19, after cooperating with the upper sheath 2, fits with the umbrella-shaped surface of the ceramic insulator 1. The upper sheath 2, installed in the sealing groove 19, forms a smooth transition umbrella-shaped arc surface with the umbrella-shaped surface of the ceramic insulator 1. This prevents water droplets from accumulating on the surface and allows them to flow away quickly, reducing conductivity and increasing safety. Simultaneously, multiple ceramic insulators 1 and umbrella-shaped rubber sleeves 5 are added according to the transmission voltage of the high-voltage line. During installation, the umbrella-shaped rubber sleeve 5 can be stretched to fit onto the ceramic insulator 1. After being released, the umbrella-shaped rubber sleeve 5 retracts and secures itself. At the same time, the locking block 3 on the upper sheath 2 engages with the locking groove 8 on the lower sheath 4 to secure the upper sheath 2 and the lower sheath 4.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A power insulator with a protective structure at its edge, comprising a ceramic insulator (1), characterized in that, The ceramic insulator (1) is provided with a protective component at its outer end, and the ceramic insulator (1) is provided with a slot (20) at its center. The ceramic insulator (1) is provided with several sets of slots (20) at both ends of the several sets of ceramic insulators (1), and upper resin rods (9) and lower resin rods (10) are respectively inserted into the slots (20) at both ends of the several sets of ceramic insulators (1). A middle resin rod (6) is inserted into the slot (20) between the upper resin rod (9) and the lower resin rod (10). Fixing seats (71) are fixedly installed at the ends of the upper resin rod (9) and the lower resin rod (10). A fastening component is provided on one side of the fixing seat (71). A card seat (11) is installed at one end of the middle resin rod (6) and the lower resin rod (10). A limiting component is provided in the card seat (11). Two sets of limiting grooves (21) are symmetrically opened at the outer ends of the rods of the upper resin rod (9) and the middle resin rod (6).

2. The power insulator with a protective structure at its edge according to claim 1, characterized in that, The protective assembly includes an upper sheath (2), a lower sheath (4), and a skirt rubber sleeve (5). The ceramic insulator (1) is an umbrella-shaped structure with an umbrella end and a handle end. A ring-shaped sealing groove (19) is provided on the outer periphery of the ceramic insulator (1). The upper sheath (2) and the lower sheath (4) are fitted to the two sides of the umbrella end of the ceramic insulator (1). The upper sheath (2) is installed on the outside of the sealing groove (19). One side of the lower sheath (4) is fixedly connected to the skirt rubber sleeve (5). The skirt rubber sleeve (5) is fitted onto the outer wall of the handle end of the ceramic insulator (1). A number of sets of locking blocks (3) are provided on one side wall of the upper sheath (2). A ring of locking grooves (8) that engage with the locking blocks (3) is provided on the lower sheath (4) in the circumferential direction.

3. The power insulator with a protective structure at its edge according to claim 1, characterized in that, The fastening assembly includes a clamp (72), a limiting seat (74), a rotating seat (75), a rotating rod (76), a threaded guide rod (77), a nut clamp (78), and a swing seat (79). The fixed seat (71) has an arc-shaped fixing groove (73) at its center. The swing seat (79) is fixedly installed on one side of the clamp (72). The rotating seat (75) is rotatably connected to the other side of the clamp (72), and the swing seat (79) is rotatably connected to one side of the fixed seat (71). The limiting seat (74) is fixedly installed on the outer wall of the other side of the fixed seat (71). The rotating rod (76) is fixedly installed on the rotating seat (75). One end of the threaded guide rod (77) is rotatably connected to the outer end of the rotating rod (76), and the nut clamp (78) is threadedly connected to the other end of the threaded guide rod (77).

4. A power insulator with a protective structure at its edge according to claim 1, characterized in that, The limiting component includes a pull block (12), a guide rod (14), an insert block (15), a fixing ring (16), and a spring (17). The card seat (11) has a positioning groove in the center, and two sets of guide grooves (18) are symmetrically arranged in the positioning groove. The guide rod (14) is slidably disposed in the guide groove (18), and the two ends of the guide rod (14) are fixedly connected to the pull block (12) and the insert block (15) respectively. The fixing ring (16) is fixedly installed on the outer end of the guide rod (14). The spring (17) is sleeved on the outer end of the guide rod (14), and the two ends of the spring (17) are fixedly connected to the opposite surfaces of the guide groove (18) and the fixing ring (16) respectively.

5. A power insulator with a protective structure at its edge according to claim 4, characterized in that, The outer surface of the insert (15) extends inclined toward the center of the positioning groove from the outside to the inside of the positioning groove, and two sets of pull grooves (13) are symmetrically provided on the pull block (12).

6. A power insulator with a protective structure at its edge according to claim 3, characterized in that, The limiting seat (74) is provided with a locking groove, and two sets of torsion plates are symmetrically installed on the outer wall of the nut clamp (78). The clamp (72) and the fixed seat (71) are in an arc shape on opposite sides.

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