Hollow composite post insulator

Abstract

The utility model relates to a hollow composite post insulator, which comprises a cylindrical insulator main body, a rubber umbrella skirt arranged on the outer side of the insulator main body and metal flanges arranged at the two ends of the insulator main body, the insulator main body comprises a plurality of sealed tank bodies filled with insulating gas or vacuum, a resin filling layer, a fiber reinforced composite material coating layer and a fiber winding composite material layer; the multiple sealed tank bodies are connected in series and fixed through the resin filling layer to form an inner core structure. The fiber reinforced composite material coating layer is adhered to the outer side of the inner core structure, the fiber winding composite material layer is arranged on the outer side of the fiber reinforced composite material coating layer, and the fiber winding composite material layer is wound on the outer side of the fiber reinforced composite material coating layer. The inflation inlet is closed, and the sealing performance is good; and the insulator is provided with a plurality of sealed tank bodies, so that the normal operation of the insulator can be ensured even if a certain sealed tank body leaks, and the anti-breakdown capability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission and transformation grid engineering, in particular to a hollow composite post insulator. Background Art

[0002] At present, composite insulators are mainly divided into two categories: hollow composite insulators and post composite insulators. Conventional post composite insulators are of solid structure. For large-diameter core materials required for high voltage levels, their pultrusion or winding processes are complex, the manufacturing cost is high, there is a potential risk of cracking inside, and the quality is relatively heavy, which is not conducive to transportation and installation.

[0003] Therefore, some technicians have proposed hollow post insulators. In order to achieve good internal insulation, insulating gas media need to be filled inside. At present, during the operation of hollow post insulators, due to the action of external loads, there is a risk that the sealing structure is damaged and insulating gas leaks, the overall sealing performance needs to be strengthened, and regular maintenance inspections are required, resulting in a large amount of maintenance costs. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a hollow composite post insulator to solve the problems in the background art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A hollow composite post insulator of the utility model includes a columnar insulator body, a rubber umbrella skirt arranged on the outer side of the insulator body, and metal flanges arranged at both ends of the insulator body;

[0007] The insulator body includes a plurality of sealed tanks filled with insulating gas or in a vacuum, a resin filling layer, a fiber-reinforced composite material coating layer, and a fiber-wound composite material layer;

[0008] The plurality of sealed tanks are connected in series and fixed by a resin filling layer to form an inner core structure;

[0009] The fiber-reinforced composite material coating layer is bonded to the outer side of the inner core structure, and a fiber-wound composite material layer is arranged on the outer side of the fiber-reinforced composite material coating layer, and the fiber-wound composite material layer is wound around the outer side of the fiber-reinforced composite material coating layer.

[0010] In an embodiment of the present application, the material of the sealed tank is one or a combination of polyethylene, polypropylene, polyvinyl chloride, and fiber-reinforced composite materials.

[0011] In an embodiment of the present application, the insulating gas is a mixed gas of one or a combination of sulfur hexafluoride, nitrogen, and carbon dioxide.

[0012] In one embodiment of the present application, the filling pressure of the sealed tank body is 0.1 MPa to 1 MPa, and the vacuum degree is 10 -5 to 10 -6 Torr.

[0013] In one embodiment of the present application, the number of the sealed tank bodies is greater than or equal to 2.

[0014] In one embodiment of the present application, the shape of the sealed tank body is an ellipsoid, a sphere or a cylinder.

[0015] In one embodiment of the present application, both the fiber-reinforced composite material coating layer and the fiber-wound composite material layer include a matrix material layer and a fiber-reinforced material layer. The material of the matrix material layer is one of epoxy resin, polyurethane resin, phenolic resin, vinyl ester resin, and bismaleimide resin, and the fiber-reinforced material layer is one of glass fiber, high-silica fiber or alumina fiber.

[0016] In one embodiment of the present application, the material of the sealed tank body includes a fiber-reinforced composite material, and the fiber-reinforced composite material is one of glass fiber, high-silica fiber or alumina fiber.

[0017] In one embodiment of the present application, the material of the resin filling layer is one of epoxy resin, polyurethane resin, phenolic resin, vinyl ester resin, and bismaleimide resin.

[0018] The beneficial effects of the present utility model are as follows: A hollow composite post insulator of the present utility model includes a columnar insulator body, a rubber umbrella skirt arranged on the outer side of the insulator body, and metal flanges arranged at both ends of the insulator body; the insulator body includes a plurality of sealed tank bodies filled with insulating gas or in a vacuum, a resin filling layer, a fiber-reinforced composite material coating layer, and a fiber-wound composite material layer; the plurality of sealed tank bodies are connected in series and fixed by the resin filling layer to form an inner core structure; the fiber-reinforced composite material coating layer is bonded to the outer side of the inner core structure, and a fiber-wound composite material layer is arranged on the outer side of the fiber-reinforced composite material coating layer, and the fiber-wound composite material layer is wound around the outer side of the fiber-reinforced composite material coating layer. The inflation port of the present application is closed, and the sealing performance is good; and there are a plurality of sealed tank bodies. Even if a certain sealed tank body leaks, the normal operation of the insulator can be ensured, and the breakdown voltage resistance is strong. Description of the Drawings

[0019] The following further describes the present utility model in conjunction with the drawings and embodiments:

[0020] Figure 1 It is a schematic structural diagram of the sealed tank body of Embodiment 1 of the present application.

[0021] Figure 2 Schematic diagram of the inner core structure of the first embodiment of the present application.

[0022] Figure 3 Schematic diagram of the fiber-reinforced composite material cladding layer structure of the first embodiment of the present application.

[0023] Figure 4 Schematic diagram of the fiber-wound composite material layer structure of the first embodiment of the present application.

[0024] Figure 5 Schematic diagram of the overall structure of the first embodiment of the present application.

[0025] Figure 6 Schematic diagram of the partial structure of the first embodiment of the present application.

[0026] Figure 7 Schematic diagram of the partial structure of the second embodiment of the present application.

[0027] Figure 8 Schematic diagram of the overall structure of the second embodiment of the present application.

[0028] Explanation of reference numerals:

[0029] 10 - Sealed tank body, 20 - Insulating gas, 30 - Resin filling layer, 40 - Fiber-reinforced composite material cladding layer, 50 - Fiber-wound composite material layer, 60 - Rubber umbrella skirt, 70 - Metal flange. Detailed implementation manners

[0030] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the layers related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the layers during actual implementation. The type, quantity, and ratio of each layer during actual implementation can be arbitrarily changed, and the layer layout type may also be more complex.

[0032] In the following description, a large number of details are explored to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details.

[0033] Example 1

[0034] As Figures 1-6 shown, a hollow composite post insulator in Example 1 of the present application includes a columnar insulator body, a rubber umbrella skirt 60 disposed outside the insulator body, and metal flanges 70 disposed at both ends of the insulator body;

[0035] The insulator body includes a plurality of sealed cans 10 filled with insulating gas 20 inside or being vacuum, a resin filling layer 30, a fiber-reinforced composite material coating layer 40, and a fiber-wound composite material layer 50;

[0036] A plurality of sealed cans 10 are connected in series and fixed by the resin filling layer 30 to form an inner core structure;

[0037] The fiber-reinforced composite material coating layer 40 is bonded to the outside of the inner core structure. A fiber-wound composite material layer 50 is provided outside the fiber-reinforced composite material coating layer 40, and the fiber-wound composite material layer 50 is wound around the outside of the fiber-reinforced composite material coating layer 40.

[0038] Wherein, both ends of the insulator body are bonded to the sealing grooves of the metal flanges 70. The sealed cans 10 in this embodiment adopt rounded top seals.

[0039] The material of the sealed cans 10 is one or a combination of polyethylene, polypropylene, polyvinyl chloride, and fiber-reinforced composite materials.

[0040] The insulating gas 20 is a mixed gas of one or a combination of sulfur hexafluoride, nitrogen, and carbon dioxide.

[0041] The filling pressure of the sealed cans 10 is 0.1 MPa to 1 MPa, and the vacuum degree is 10 -5 to 10 -6 Torr.

[0042] The number of the sealed cans 10 is greater than or equal to 2.

[0043] The shape of the sealed cans 10 is an ellipsoid, a sphere, or a cylinder.

[0044] Both the fiber-reinforced composite material coating layer 40 and the fiber-wound composite material layer 50 include a matrix material layer and a fiber-reinforced material layer. The material of the matrix material layer is one of epoxy resin, polyurethane resin, phenolic resin, vinyl ester resin, and bismaleimide resin, and the fiber-reinforced material layer is one of glass fiber, high silica fiber, or alumina fiber.

[0045] The material of the sealed cans 10 includes fiber-reinforced composite materials, and the fiber-reinforced composite materials are one of glass fiber, high silica fiber, or alumina fiber.

[0046] The material of the resin filling layer 30 is one of epoxy resin, polyurethane resin, phenolic resin, vinyl ester resin, and bismaleimide resin.

[0047] In this embodiment, the manufacturing process of the hollow composite insulator is as follows:

[0048] 1. Filling the insulating gas into the sealed tank 10: Fill the insulating gas SF 6 20 into the three-round-corner top-sealed tank 10 until the pressure reaches 0.15 Mpa, and then close the gas filling hole;

[0049] 2. Preparing the epoxy resin glue: Thoroughly mix epoxy resin, curing agent, and accelerator to obtain the epoxy resin glue;

[0050] 3. Preparing the inner core structure: Place the three-round-corner top-sealed tanks 10 in series in a cylindrical mold, and then inject the epoxy resin glue into the mold by vacuum injection to completely fill the gap between the sealed tank and the mold. After curing, demold to obtain the inner core structure;

[0051] 4. Preparing the fiber-reinforced composite material coating layer 40: Wrap the glass fiber cloth impregnated with epoxy resin glue around the inner core structure, and after curing, obtain the fiber-reinforced composite material coating layer 40;

[0052] 5. Preparing the fiber-wound composite material layer 50: Use winding equipment to evenly wind the continuous glass fiber or cloth tape impregnated with epoxy resin glue on the fiber-reinforced composite material coating layer in step 2 by winding process, and after curing, form the fiber-wound composite material layer 50;

[0053] 6. Glue-like metal flanges 70: Glue the upper and lower end flanges on the upper and lower ends of the fiber-wound composite material layer 50 respectively;

[0054] 7. Preparing the rubber umbrella skirt 60: The rubber umbrella skirt 60 is set on the fiber-wound composite material layer 50 by the integral injection molding process of vacuum-pumping high-temperature silicone rubber or liquid silicone rubber, and bond the rubber to the sealing grooves of the upper and lower end metal flanges 70 to complete the product processing.

[0055] Embodiment 2

[0056] As Figures 7-8 shown, from the inside to the outside of this embodiment are successively: three containing insulating gas SF 6The angular top-sealed tanks 10 of 20 are connected in series, and are bonded with a resin filling layer 30 to form an inner core structure, a fiber-reinforced composite material coating layer 40, a fiber-wound composite material layer 50, a rubber umbrella skirt 60, and a metal flange 70. The inner core structure is bonded to the fiber-reinforced composite material coating layer 40. The rubber umbrella skirt 60 is sleeved on the fiber-wound composite material layer 50, and both ends of the rubber umbrella skirt 60 are bonded to the sealing grooves of the upper and lower end metal flanges 70 respectively.

[0057] The manufacturing process of the hollow composite post insulator is as follows:

[0058] 1. Filling the sealed tank with insulating gas: Fill the insulating gas SF 6 20 into the three angular top-sealed tanks 10 until the pressure reaches 0.15 Mpa, and then close the inflation hole;

[0059] 2. Preparing epoxy resin glue: Thoroughly mix epoxy resin, curing agent, and accelerator to obtain epoxy resin glue;

[0060] 3. Preparing the inner core structure: Place the three angular top-sealed tanks in a cylindrical mold in series, and then inject the epoxy resin glue into the mold by vacuum injection to completely fill the gap between the sealed tank and the mold. After curing, demold to obtain the inner core structure;

[0061] 4. Preparing the fiber-reinforced composite material coating layer: Wrap the glass fiber cloth impregnated with epoxy resin glue around the inner core structure to obtain the cured fiber-reinforced composite material coating layer 40;

[0062] 5. Preparing the fiber-wound composite material layer: Use a winding device to evenly wind the continuous glass fiber or cloth tape impregnated with epoxy resin glue on the fiber-reinforced composite material coating layer in step 2. After curing, form the fiber-wound composite material layer 50;

[0063] 6. Gluing the metal flanges: Glue the upper and lower end flanges 70 on the upper and lower ends of the fiber-wound composite material layer 50 respectively;

[0064] 7. Preparing the rubber umbrella skirt: The rubber umbrella skirt 60 is set on the fiber-wound composite material layer 50 by using the integral injection molding process of vacuum high-temperature silicone rubber or liquid silicone rubber, and the rubber is bonded to the sealing grooves of the upper and lower end metal flanges 70, and the product processing is completed.

[0065] A hollow composite post insulator of the present utility model includes a columnar insulator body, rubber umbrella skirts arranged on the outer side of the insulator body, and metal flanges arranged at both ends of the insulator body; the insulator body includes a plurality of sealed cans filled with insulating gas or being vacuum inside, a resin filling layer, a fiber-reinforced composite material coating layer, and a fiber-wound composite material layer; the plurality of sealed cans are connected in series and fixed by the resin filling layer to form an inner core structure; the fiber-reinforced composite material coating layer is bonded to the outer side of the inner core structure, and a fiber-wound composite material layer is arranged on the outer side of the fiber-reinforced composite material coating layer, and the fiber-wound composite material layer is wound around the outer side of the fiber-reinforced composite material coating layer. The inflation port of this application is closed, and the sealing performance is good; and there are a plurality of sealed cans, even if a certain sealed can leaks, the normal operation of the insulator can be guaranteed, and the breakdown resistance is strong.

[0066] In the above embodiments, although the present utility model has been described in conjunction with specific embodiments of the present utility model, many substitutions, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The embodiments of the present utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims.

[0067] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A hollow composite post insulator, characterized in that: It comprises a columnar insulator body, a rubber shed (60) arranged outside the insulator body, and metal flanges (70) arranged at both ends of the insulator body; The insulator body comprises a plurality of sealed cans (10) filled with insulating gas (20) or in a vacuum state, a resin filling layer (30), a fiber-reinforced composite material coating layer (40), and a fiber-wound composite material layer (50); The multiple sealed can bodies (10) are connected in series and fixed via a resin filling layer (30) to form an inner core structure; The fiber-reinforced composite material covering layer (40) is bonded to the outer side of the inner core structure, and a fiber-wound composite material layer (50) is provided on the outer side of the fiber-reinforced composite material covering layer (40), and the fiber-wound composite material layer (50) is wound on the outer side of the fiber-reinforced composite material covering layer (40).

2. A hollow composite post insulator according to claim 1, characterized in that: The material of the sealed tank body (10) is one of polyethylene, polypropylene, polyvinyl chloride, and a fiber-reinforced composite material.

3. The hollow composite post insulator according to claim 1, characterized in that: The insulating gas (20) is one of sulfur hexafluoride, nitrogen and carbon dioxide.

4. The hollow composite post insulator according to claim 1, characterized in that: The filling pressure of the sealed tank body (10) is 0.1 MPa to 1 MPa, and the vacuum degree is 10 -5 to 10 -6 Entrust.

5. The hollow composite post insulator according to claim 1, characterized in that: The number of the sealed tank bodies (10) is greater than or equal to 2.

6. The hollow composite post insulator according to claim 1, characterized in that: The sealed tank body (10) is in the shape of an ellipsoid, a sphere or a cylinder.

7. The hollow composite post insulator according to claim 1, characterized in that: The fiber-reinforced composite material coating layer (40) and the fiber-wound composite material layer (50) both comprise a matrix material layer and a fiber-reinforced material layer, wherein the matrix material layer is made of one of epoxy resin, polyurethane resin, phenolic resin, vinyl ester resin, and bismaleimide resin, and the fiber-reinforced material layer is made of one of glass fiber, high-silica fiber, or alumina fiber.

8. The hollow composite post insulator according to claim 2, characterized in that: The material of the sealed tank body (10) comprises a fiber-reinforced composite material, and the fiber-reinforced composite material is one of glass fiber, high-silica fiber or alumina fiber.

9. The hollow composite post insulator according to claim 1, characterized in that: The material of the resin filling layer (30) is one of epoxy resin, polyurethane resin, phenolic resin, vinyl ester resin and bismaleimide resin.

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