Composite post insulator for high-voltage equipment

Abstract

The utility model relates to the field of high-voltage equipment protection devices, and provides a composite post insulator for high-voltage equipment, which comprises a composite core column, an insulating umbrella skirt arranged on the peripheral side of the composite core column and two end hardware fittings arranged at the two ends of the composite core column respectively, wherein the side end face of the end fitting is coaxially provided with a construction groove, a part of the composite core column is arranged in the construction groove, the peripheral face of the end fitting is provided with an annular hook groove, and the insulating umbrella skirt is provided with an inner hook part which is clamped and matched with the annular hook groove; in an assembly state, a glue injection space is formed between the composite core column and the insulating umbrella skirt, and insulating resin glue is injected into the glue injection space to form an insulating resin layer. On the basis, the production efficiency of the composite post insulator can be improved, and mass production of the composite post insulator is facilitated.

Description

Technical Field

[0001] The present application relates to the field of high-voltage equipment protection devices, and in particular to a composite post insulator for high-voltage equipment. Background Art

[0002] With the construction of high-voltage AC and DC lines in my country, post insulators are increasingly used in power systems and high-voltage equipment. They are used to support and fix various equipment and components of power transmission and distribution lines, providing electrical insulation, preventing current leakage, and protecting the safe operation of equipment.

[0003] In existing composite post insulator manufacturing techniques, the core rod, sheds, and hardware components are typically fabricated separately. The sheds are then fitted over the core rod and secured with glue. Finally, the hardware is crimped onto the core rod and sheds to form a stable end connection. However, this manufacturing method results in low production efficiency for composite post insulators, resulting in low throughput per unit time during mass production, which requires improvement. Utility Model Content

[0004] Based on this, the present application provides a composite post insulator for high-voltage equipment, which has the advantage of high production efficiency and is suitable for mass production.

[0005] The present application provides a composite post insulator for high-voltage equipment that adopts the following technical solution:

[0006] A composite post insulator for high-voltage equipment comprises a composite core, an insulating shed arranged on the outer circumference of the composite core, and two end fittings respectively arranged at both ends of the composite core; wherein, a structural groove is coaxially provided on the side end face of the end fitting, the composite core is partially arranged inside the structural groove, a ring hook groove is provided on the outer circumference of the end fitting, and the insulating shed is provided with an inner hook portion that is adapted to be snap-fitted with the ring hook groove; in the assembled state, a glue injection space is formed between the composite core and the insulating shed, and insulating resin glue is poured into the glue injection space to form an insulating resin layer.

[0007] By adopting the above-mentioned technical solution, after the composite core column, insulating umbrella skirt and two end fittings of the present application are respectively manufactured and formed, the insulating umbrella skirt is placed on the outer peripheral side of the composite core column, and then the two end fittings are placed at both ends of the composite core column, so that the ends of the composite core column enter the structural grooves of the corresponding end fittings, and at the same time, the inner hook of the insulating umbrella skirt is matched and snapped into the ring hook groove of the end fitting, so that the composite core column and the insulating umbrella skirt can remain coaxial. At this time, a glue injection space can be formed between the composite core column and the insulating umbrella skirt, and insulating resin glue is poured into the glue injection space, and an insulating resin layer is formed after solidification, which can not only play the role of internal electrical insulation, but also enable the composite core column, insulating umbrella skirt and two end fittings to be connected and formed at one time, thereby improving the production efficiency of the composite post insulator and facilitating the mass production of the composite post insulator.

[0008] Optionally, the composite core column includes a core rod and multiple porcelain ring sleeves sleeved on the core rod, and each porcelain ring sleeve is spaced apart along the axis of the core rod; the inner diameter of the structural groove is adapted to the outer diameter of the core rod, and the outer diameter of the structural groove is adapted to the inner diameter of the porcelain ring sleeve.

[0009] By adopting the above technical solution, a porcelain ring sleeve is provided, and after insulating resin glue is poured into the glue injection space, the porcelain ring sleeve can be wrapped, reducing the possibility of the porcelain ring sleeve being broken by stress; the porcelain ring sleeve made of ceramic material has higher structural strength than the core rod made of epoxy resin material, which is beneficial to improving the mechanical strength of the composite post insulator and extending its service life.

[0010] Optionally, an annular convex portion is protruding from the inner bottom wall of the structural groove, and in the assembled state, the annular convex portion is matched and arranged between the porcelain ring sleeve and the core rod.

[0011] By adopting the above technical solution, the setting of the ring sleeve portion can be used to position the core rod and the porcelain ring sleeve, so that the core rod and the porcelain ring sleeve can smoothly maintain coaxiality after the composite core column is installed in the two end hardware.

[0012] Optionally, a fiberglass mesh is sandwiched between the core rod and the bottom wall of the structural groove.

[0013] By adopting the above technical solution, the provision of the glass fiber mesh can reduce the stress contact between the core rod and the bottom wall of the structural groove, thereby reducing the possibility of metal particles being generated due to contact friction between the two; thereby reducing the occurrence of metal particles being carried into the injection space by the insulating resin tape and affecting the insulating performance of the insulator.

[0014] Optionally, the two end fittings are respectively configured as a top fitting and a bottom fitting, the bottom fitting is provided with a glue injection hole connected to the structural groove, and the top fitting is provided with an exhaust hole connected to the structural groove.

[0015] By adopting the above-mentioned technical solution, when pouring the insulating resin glue, the insulating resin glue is injected into the glue injection space through the glue injection hole of the bottom hardware. The upward flow of the insulating resin glue is more conducive to discharging the internal gas of the glue injection space through the exhaust hole, thereby reducing the presence of internal bubbles after the insulating resin layer is formed, which is conducive to maintaining good insulation performance.

[0016] Optionally, a spiral groove is provided on the outer peripheral surface of the core rod, and the spiral groove is spirally extended along the axial direction of the core rod, and both ends of the spiral groove respectively pass through the two side end surfaces of the core rod.

[0017] By adopting the above technical solution and setting a spiral groove, the insulating resin glue can enter the glue injection space along the spiral groove after being injected into the structural groove from the glue injection hole, which is conducive to the uniform injection of the insulating resin glue in all directions inside the glue injection space, thereby improving the finished product rate of the composite post insulator.

[0018] Optionally, the inner peripheral wall of the structural groove is provided with a reinforcing ring groove for enhancing the connection strength between the end fitting and the composite core column.

[0019] By adopting the above technical solution, after the insulating resin glue is poured into the glue injection space, it can partially enter the reinforcement ring groove and solidify into shape, which is beneficial to enhancing the connection strength between the end hardware and the composite core column, so that the composite post insulator maintains a good service life.

[0020] Optionally, the surface of the insulating shed is coated with a super hydrophobic layer.

[0021] By adopting the above technical solution and setting a super-hydrophobic layer, water droplets falling on the surface of the insulating shed during rainfall can form a spherical rolling state, thereby achieving a self-cleaning effect and reducing the situation where water droplets adhere to the surface of the insulating shed to form current breakdown.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. After assembling the composite core, insulating sheds, and two end fittings, insulating resin glue is poured into the glue injection space and solidified to form an insulating resin layer. This not only provides internal electrical insulation, but also enables all components to be connected and formed at one time, thereby improving the production efficiency of the composite post insulator and facilitating mass production of composite post insulators.

[0024] 2. The ceramic ring sleeve can be wrapped by pouring insulating resin glue into the glue injection space. The ceramic ring sleeve made of ceramic material has higher structural strength than the core rod made of epoxy resin material, which is beneficial to improve the mechanical strength of the composite post insulator and extend the service life;

[0025] 3. By injecting the insulating resin glue into the injection space through the injection hole of the bottom hardware, the upward flow of the insulating resin glue is more conducive to discharging the internal gas of the injection space through the exhaust hole, thereby reducing the presence of internal bubbles after the insulating resin layer is formed, which is conducive to maintaining good insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the assembly of the composite core column, insulating sheds and two top fittings in this embodiment;

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 Schematic diagram of the structure of the top hardware in this embodiment;

[0029] Figure 4 Schematic diagram of the overall structure of the composite post insulator in this embodiment.

[0030] Explanation of the accompanying symbols: 1. Composite core column; 11. Core rod; 111. Spiral groove; 12. Ceramic ring sleeve; 121. Boss; 122. Groove; 2. Insulating umbrella skirt; 21. Inner hook; 22. Super-hydrophobic layer; 3. End hardware; 31. Structural groove; 32. Ring convex portion; 33. Glass fiber mesh; 34. Ring hook groove; 35. Reinforced ring groove; 36. Bottom hardware; 361. Glue injection hole; 37. Top hardware; 371. Exhaust hole; 4. Insulating resin layer. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] An embodiment of the present application discloses a composite post insulator for high-voltage equipment.

[0033] Reference Figure 1 A composite post insulator for high-voltage equipment includes a composite core column 1, an insulating shed 2 arranged on the outer periphery of the composite core column 1, and two end fittings 3 respectively arranged at both ends of the composite core column 1.

[0034] Among them, the composite core column 1 includes a core rod 11 and a porcelain ring sleeve 12. The core rod 11 is made of epoxy resin material and glass fiber as main raw materials, with other additives added and made through a drawing process. It is a conventional design in this field and will not be described in detail here; after the core rod 11 is formed, a plurality of spiral grooves 111 are equidistantly arranged on the outer circumference of the core rod 11. The spiral grooves 111 are spirally extended along the axial direction of the core rod 11, and the two ends of the spiral grooves 111 respectively pass through the end faces on both sides of the core rod 11.

[0035] There are multiple ceramic ring sleeves 12, each of which is sleeved on the outer circumference of the core rod 11, and the ceramic ring sleeves 12 and the core rod 11 are spaced apart; each ceramic ring sleeve 12 is equidistantly arranged along the axis of the core rod 11. Figure 2 The two side end faces of each ceramic ring sleeve 12 are respectively provided with a boss 121 and a groove 122, and the axial length of the boss 121 is greater than the groove depth of the groove 122. When the boss 121 of the ceramic ring sleeve 12 is correspondingly inserted into the groove 122 of another ceramic ring sleeve 12, the interval between the two adjacent ceramic ring sleeves 12 can be maintained.

[0036] Reference Figure 3 The side surface of the end fitting 3 is provided with a structural groove 31, which is coaxial with the end fitting 3; the inner bottom wall of the structural groove 31 is provided with a ring convex portion 32, which is coaxial with the end fitting 3 and integrally formed. Figure 1 It should be noted that, in this embodiment, the inner diameter of the annular protrusion 32 is set to be equal to the outer diameter of the core rod 11, so that the core rod 11 can be matched and inserted into the inner side of the annular protrusion 32 in the assembled state; a glass fiber mesh 33 is also provided inside the structural groove 31. The glass fiber mesh 33 is made of a glass fiber mesh and is arranged on the inner side of the annular protrusion 32 for abutting against the end of the core rod 11, so that a gap is formed between the core rod 11 and the inner bottom wall of the structural groove 31, thereby reducing the generation of metal particles due to friction.

[0037] In addition, the outer diameter of the annular protrusion 32 is set to be equal to the inner diameter of the porcelain ring sleeve 12, so that the porcelain ring sleeve 12 can be matched and sleeved on the outer side of the annular protrusion 32 in the assembled state, thereby achieving coaxial maintenance between the core rod 11 and the porcelain ring sleeve 12. It can be understood that the assembled state mentioned above refers to the state after the composite core leg 1, the insulating shed 2 and the two composite core legs 1 are connected.

[0038] Back to Figure 1 In this embodiment, the two end fittings 3 are configured as a top fitting 37 and a bottom fitting 36, respectively. When the composite post insulator is installed in electrical equipment, the bottom fitting 36 is located at the bottom of the insulator, while the top fitting 37 is located at the top. The bottom fitting 36 has a glue injection hole 361 on the side facing away from the composite core 1, which communicates with the structural groove 31 of the bottom fitting 36. The top fitting 37 has an exhaust hole 371 on the side facing away from the composite core 1, which communicates with the structural groove 31 of the top fitting 37.

[0039] Back to Figure 2The inner diameter of the insulating shed 2 is equal to the outer diameter of the end fitting 3; the inner side surface of the insulating shed 2 is integrally formed with an inner hook 21, and the number of the inner hooks 21 is provided with two, and the two inner hooks 21 are respectively arranged at both ends of the insulating shed 2; and the surface of the insulating shed 2 is coated with a super-hydrophobic layer 22. The setting of the super-hydrophobic layer 22 can form a spherical rolling state after water droplets fall on the surface of the insulating shed 2, thereby achieving a self-cleaning effect and reducing the situation where water droplets adhere to the surface of the insulating shed 2 to form current breakdown.

[0040] The outer circumference of each end fitting 3 is provided with a hook groove 34. In the assembled state, the two inner hooks 21 are respectively clamped in the hook groove 34 of the end fitting 3, so that the insulating shed 2 and the end fitting 3 can be kept fixed; at this time, a glue injection space can be formed between the insulating shed 2 and the core rod 11. Figure 4 Insulating resin glue is poured into the glue injection space through the glue injection hole 361, and after solidification, an insulating resin layer 4 can be formed, so that the inside of the insulator has good insulation performance; it should be noted that the insulating resin glue here can be polyurethane resin or epoxy resin, both of which have good insulation performance.

[0041] In addition, the inner wall of the structural groove 31 is provided with a reinforcing ring groove 35 for enhancing the connection strength between the end hardware 3 and the composite core column 1. When the insulating resin glue is poured into the glue injection space through the glue injection hole 361, part of the insulating resin glue can enter the reinforcing ring groove 35 and solidify into shape, thereby enhancing the connection strength between the end hardware 3 and the composite core column 1, so that the composite post insulator maintains a good service life.

[0042] The implementation principle of a composite post insulator for high-voltage equipment in the embodiment of the present application is as follows:

[0043] After the composite core column 1, insulating shed 2 and two end fittings 3 of the present application are respectively manufactured and formed, the core rod 11 is inserted into the inner side of the annular protrusion 32, and each porcelain ring sleeve 12 is sequentially sleeved on the outer side of the annular protrusion 32; then the insulating shed 2 is fixed between the two end fittings 3 through the cooperation of the inner hook portion 21 and the annular hook groove 34. At this time, a glue injection space can be formed between the core rod 11 and the insulating shed 2, and insulating resin glue is poured into the glue injection space and solidified to form an insulating resin layer 4, which can not only play the role of internal electrical insulation, but also enable the composite core column 1, insulating shed 2 and two end fittings 3 to be connected and formed at one time, thereby improving the production efficiency of the composite post insulator, which is conducive to the mass production of composite post insulators.

[0044] The above are preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A composite post insulator for high voltage equipment, characterized in that: The invention comprises a composite core column (1), an insulating umbrella skirt (2) arranged on the outer peripheral side of the composite core column (1), and two end fittings (3) respectively arranged at both ends of the composite core column (1); wherein, a structural groove (31) is coaxially arranged on the side end face of the end fitting (3), the composite core column (1) is partially arranged inside the structural groove (31), the outer peripheral face of the end fitting (3) is provided with a ring hook groove (34), and the insulating umbrella skirt (2) is provided with an inner hook portion (21) adapted to be snap-fitted with the ring hook groove (34); in an assembled state, a glue injection space is formed between the composite core column (1) and the insulating umbrella skirt (2), and insulating resin glue is poured into the glue injection space to form an insulating resin layer (4).

2. The composite post insulator according to claim 1, characterized in that: The composite core column (1) comprises a core rod (11) and a plurality of ceramic ring sleeves (12) sleeved on the core rod (11), wherein the ceramic ring sleeves (12) are spaced apart along the axial direction of the core rod (11); the inner diameter of the structural groove (31) is adapted to the outer diameter of the core rod (11), and the outer diameter of the structural groove (31) is adapted to the inner diameter of the ceramic ring sleeves (12).

3. The composite post insulator according to claim 2, wherein: An annular convex portion (32) is protruding from the inner bottom wall of the structural groove (31). In the assembled state, the annular convex portion (32) is matched and arranged between the porcelain ring sleeve (12) and the core rod (11).

4. The composite post insulator according to claim 3, characterized in that: A glass fiber mesh (33) is sandwiched between the core rod (11) and the inner bottom wall of the structural groove (31).

5. The composite post insulator according to claim 2, wherein: The two end fittings (3) are respectively configured as a top fitting (37) and a bottom fitting (36); the bottom fitting (36) is provided with a glue injection hole (361) connected to the structural groove (31); and the top fitting (37) is provided with an exhaust hole (371) connected to the structural groove (31).

6. The composite post insulator according to claim 5, characterized in that: The outer peripheral surface of the core rod (11) is provided with a spiral groove (111), the spiral groove (111) is spirally extended along the axial direction of the core rod (11), and the two ends of the spiral groove (111) respectively pass through the two side end surfaces of the core rod (11).

7. The composite post insulator according to claim 1, wherein: The inner peripheral wall of the structural groove (31) is provided with a reinforcing ring groove (35) for enhancing the connection strength between the end fitting (3) and the composite core column (1).

8. The composite post insulator according to claim 1, wherein: The surface of the insulating shed (2) is coated with a super-hydrophobic layer (22).

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