High-temperature-resistant and high-voltage-resistant electric insulator

Abstract

The utility model discloses a high temperature and high pressure resistant electrical insulator, which comprises a core rod and a plurality of umbrella skirts which are uniformly sleeved on the outer side of the core rod at intervals from top to bottom, a blind hole is upwards arranged at the bottom of the core rod, and a metal foil layer connected with the inner wall of the core rod is arranged in the blind hole. Wherein the core rod and the left side wall and the right side wall of the metal foil layer are provided with a plurality of through holes from top to bottom, the bottom of each umbrella skirt protrudes downwards to form a convex surface section, and the outer surface of each umbrella skirt is sprayed with a ceramic coating. According to the utility model, through the arrangement of the through hole and the metal foil layer, heat in the core rod can be discharged through the bottom outlets of the through hole and the blind hole along with air flow, so that the core rod has a better heat dissipation effect and can bear higher temperature, and the sprayed ceramic coating has good high-voltage resistance and can carry out high-voltage protection on the umbrella skirt, so that the service life of the umbrella skirt is prolonged. And the use requirement of the electric insulator is met.

Description

Technical Field

[0001] This utility model specifically relates to an electrical insulator resistant to high temperature and high pressure. Background Technology

[0002] Electrical insulators, also known as dielectrics, are substances that do not conduct current under normal conditions. Their molecules have tightly bound positive and negative charges, very few freely moving charged particles, and extremely high resistivity. They are generally used in electronic connectors or communication connection terminals to insulate and fix the communication terminal and improve the transmission stability of communication equipment. Currently, there is a type of electrical insulator composed of sheds and core rods, also known as an insulator. It is used to block current and support conductors and is a specific type of electrical insulator.

[0003] Currently, the aforementioned electrical insulators often lack high-voltage resistance during use. When used on lines with excessively high voltage, the skirt may crack, and the core rod has poor heat dissipation performance, often softening and failing to provide effective support for the skirt.

[0004] Therefore, it is necessary to invent a high-temperature and high-pressure resistant electrical insulator to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model

[0006] To address the technical problems existing in the background art, this utility model proposes a high-temperature and high-pressure resistant electrical insulator. By opening through holes and a metal foil layer, the heat inside the core rod can be discharged through the through holes and the bottom outlet of the blind holes with the air flow, so that the core rod has a better heat dissipation effect and can withstand higher temperatures. The sprayed ceramic coating itself has good high-pressure resistance and can provide high-pressure protection for the skirt, thus meeting the usage requirements of the electrical insulator.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature and high-pressure resistant electrical insulator, comprising a core rod and a plurality of umbrella skirts uniformly spaced from top to bottom on the outside of the core rod, wherein a blind hole is provided at the bottom of the core rod facing upward, and a metal foil layer connected to the inner wall of the core rod is provided inside the blind hole, wherein a plurality of through holes are provided on the left and right side walls of the core rod and the metal foil layer from top to bottom;

[0009] Each of the umbrella skirts has a convex section protruding downwards at the bottom, and the outer surface of each umbrella skirt is coated with a ceramic coating.

[0010] Preferably, the outer edge of each umbrella skirt away from the core rod is rounded, and each umbrella skirt is made of epoxy resin layer.

[0011] Preferably, the top of each of the umbrella skirts is set as a slope, and the top slopes towards the center of the mandrel.

[0012] Preferably, the core rod is configured as a glass fiber layer.

[0013] Preferably, the outer side of the core rod is wrapped with an insulating layer, which is a polyimide film layer.

[0014] Preferably, the metal foil layer is an aluminum foil layer, and the metal foil layer is a hollow column.

[0015] Preferably, the through holes on the metal foil layer and the core rod are arranged in a one-to-one correspondence and are evenly spaced from top to bottom.

[0016] Preferably, each of the through holes has rounded corners at its inlet on the outer side of the mandrel and at its outlet on the inner wall of the metal foil layer, and the outlet at the bottom of the metal foil layer also has rounded corners.

[0017] Preferably, a mounting base is connected to the bottom of the mandrel, and an insulating cap is connected to the top of the mandrel.

[0018] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0019] This invention utilizes multiple through holes in the core rod to generate airflow inside, dissipating heat through these holes. The metal foil layer guides the heat, allowing it to dissipate quickly through the bottom outlet of the blind hole. This results in a core rod with excellent heat dissipation, capable of withstanding higher temperatures and less prone to damage. The convex section of the umbrella skirt increases its contact area with the outside air, ensuring good heat dissipation performance. The sprayed ceramic coating possesses excellent high-voltage resistance, providing high-voltage protection for the umbrella skirt and meeting the requirements for this electrical insulator. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a half-sectional view of the present invention;

[0023] Figure 3 This is a cross-sectional view of the umbrella skirt of this utility model;

[0024] Figure 4 This is a distribution diagram of the through holes in this utility model;

[0025] Figure 5 This is a schematic diagram of the connection structure between the metal foil layer and the core rod of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Core rod, 2. Umbrella skirt, 3. Blind hole, 4. Metal foil layer, 5. Through hole, 6. Convex section, 7. Ceramic coating, 8. Insulation layer, 9. Mounting base, 10. Insulation cap. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model provides, for example Figure 1-5 The high-temperature and high-pressure resistant electrical insulator shown includes a core rod 1 and a plurality of umbrella skirts 2 uniformly spaced from top to bottom on the outside of the core rod 1. A blind hole 3 is opened at the bottom of the core rod 1, and a metal foil layer 4 connected to the inner wall of the core rod 1 is disposed inside the blind hole 3. A plurality of through holes 5 are opened from top to bottom on the left and right side walls of the core rod 1 and the metal foil layer 4.

[0030] Each of the umbrella skirts 2 has a convex section 6 protruding downwards at the bottom, and each of the umbrella skirts 2 has a ceramic coating 7 sprayed on its outer surface.

[0031] In one embodiment, the outer edges of each umbrella skirt 2 away from the core rod 1 are rounded, each umbrella skirt 2 is made of epoxy resin layer, and the top of each umbrella skirt 2 is made of slope, with the top tilting towards the center of the core rod 1. The umbrella skirt 2 made of epoxy resin layer has good mechanical strength and also has the necessary insulation performance. The design of the top slope and the design of the bottom convex section 6 can optimize the air flow path on the outside of the umbrella skirt 2, so that the air flow velocity on the outside of the umbrella skirt 2 is faster, thereby improving the heat dissipation effect of the umbrella skirt 2. At the same time, the rounded edges of the umbrella skirt 2 can avoid electric field distortion caused by the presence of sharp edges, so as to achieve high voltage protection and long-term reliability of the umbrella skirt 2.

[0032] In one embodiment, the core rod 1 is configured as a glass fiber layer. Glass fiber has high mechanical strength, is lightweight, corrosion-resistant, and has good insulation properties. The core rod 1 is wrapped with an insulation layer 8, which is configured as a polyimide film layer. Since the core rod 1 is connected to a metal foil layer 4, an additional layer of insulation protection is required at the connection between the core rod 1 and the skirt 2. The polyimide film layer can significantly improve the heat dissipation capacity of the core rod 1 while ensuring insulation performance. It is suitable for high-temperature and high-load power equipment scenarios, thereby preventing short circuits or electric field distortions inside the core rod 1 due to the metal foil layer 4.

[0033] In one embodiment, the metal foil layer 4 is set as an aluminum foil layer. The metal foil layer 4 can provide a high thermal conductivity path, so that the heat inside the mandrel 1 can be quickly discharged downward along the blind hole 3, avoiding damage to the mandrel 1 due to excessive temperature.

[0034] In one embodiment, the through holes 5 on the metal foil layer 4 and the core rod 1 are arranged in a one-to-one correspondence and are evenly distributed from top to bottom. The inlet of each through hole 5 on the outer side of the core rod 1 and the outlet on the inner wall of the metal foil layer 4 are rounded. The bottom outlet of the metal foil layer 4 is also rounded to avoid electric field distortion caused by the presence of sharp edges in the through holes 5 or the bottom outlet of the metal foil layer 4, to prevent the local electric field intensity from increasing, to reduce the probability of flashover risk, and to ensure the normal use of the electrical insulator.

[0035] In one embodiment, the bottom of the core rod 1 is connected to a mounting base 9, and the top of the core rod 1 is connected to an insulating cap 10, which facilitates the normal installation and use of the electrical insulator.

[0036] The specific implementation method is as follows: When this utility model is in use, since the umbrella skirt 2 directly determines the surface flashover voltage of the electrical insulator and affects the electric field distribution, the core of high voltage protection is the umbrella skirt 2. Similarly, since the core rod 1 bears the mechanical load, if it softens or deforms at high temperature, it may cause the insulator to break or have poor electrical contact. Therefore, the core of high temperature protection is the core rod 1.

[0037] Specifically, by opening multiple through holes 5 on the core rod 1, airflow can be generated inside the core rod 1. At this time, the heat inside the core rod 1 can be discharged through the through holes 5 by natural convection. Furthermore, the metal foil layer 4 allows the heat to be effectively guided and quickly transferred downwards along the blind hole 3, and discharged through the bottom outlet of the blind hole 3. This gives the core rod 1 a better heat dissipation effect, enables it to withstand higher temperatures, and makes it less prone to damage.

[0038] When the umbrella skirt 2 is in use, the convex section 6 at its bottom increases the contact area between the umbrella skirt 2 and the outside air, which increases the heat dissipation surface area of ​​the umbrella skirt 2 and promotes air convection on the outside of the umbrella skirt 2, so that the umbrella skirt 2 itself also has good heat dissipation performance. The sprayed ceramic coating 7 not only maintains its insulation performance at high temperatures, but also has good high voltage resistance performance, providing high voltage protection for the umbrella skirt 2, so that the umbrella skirt 2 also has high voltage resistance performance, meeting the usage requirements of the electrical insulator.

[0039] This embodiment specifically solves the problem that the existing electrical insulators often do not have the performance to withstand high voltage when used. When used on some lines with excessively high voltage, the umbrella skirt 2 will crack, and the heat dissipation performance of the core rod 1 is also poor, often softening and unable to effectively support the umbrella skirt 2.

[0040] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-temperature and high-pressure resistant electrical insulator, comprising a core rod (1) and a plurality of skirts (2) uniformly spaced from top to bottom on the outside of the core rod (1), characterized in that: The bottom of the core rod (1) is provided with a blind hole (3) facing upwards. A metal foil layer (4) connected to the inner wall of the core rod (1) is provided inside the blind hole (3). Several through holes (5) are provided on the left and right side walls of the core rod (1) and the metal foil layer (4) from top to bottom. Each of the umbrella skirts (2) has a convex section (6) protruding downwards at the bottom, and each of the umbrella skirts (2) has a ceramic coating (7) sprayed on its outer surface.

2. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: Each of the umbrella skirts (2) has a rounded corner on the outer side away from the core rod (1), and each of the umbrella skirts (2) is made of epoxy resin.

3. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: Each of the umbrella skirts (2) has a sloping top, which is inclined toward the center of the core rod (1).

4. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: The core rod (1) is configured as a glass fiber layer.

5. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: The core rod (1) is wrapped with an insulating layer (8), which is a polyimide film layer.

6. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: The metal foil layer (4) is configured as an aluminum foil layer, and the metal foil layer (4) is configured as a hollow column.

7. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: The through holes (5) on the metal foil layer (4) and the core rod (1) are arranged in a one-to-one correspondence and are evenly distributed from top to bottom.

8. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: Each of the through holes (5) is rounded at the entrance on the outer side of the core rod (1) and at the exit on the inner wall of the metal foil layer (4), and the bottom exit of the metal foil layer (4) is also rounded.

9. The high-temperature and high-pressure resistant electrical insulator according to claim 1, characterized in that: The bottom of the core rod (1) is connected to a mounting base (9), and the top of the core rod (1) is connected to an insulating cap (10).

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