Column insulator made of ceramic material

Abstract

The utility model relates to a column type insulator made of a ceramic material. The column type insulator comprises a column body, a plurality of umbrella skirts fixedly arranged on the column body, and a wire connecting body fixed at the upper part of the column body. The wire connecting body comprises a fitting part and an insulating connecting block. The lower end of the fitting part is fixedly connected with the upper end of the insulating connecting block. A sinking groove is formed in the upper end face of the insulating connecting block, an annular radial flange is formed at the lower end of the fitting part, and the radial flange can be inserted into the sinking groove. A threaded counter bore connected with the upper end of the column body is formed in the lower end of the insulating connecting block. And the insulating connecting block is made of a plastic compound containing diamond particles. According to the utility model, the overheat condition of the fitting part arranged at the upper part of the column type insulator can be inhibited, and the matching effect between the fitting part and the lead can be maintained in a safe and reliable state.

Description

Technical Field

[0001] This utility model relates to the field of insulator technology, specifically to a ceramic material post insulator. Background Technology

[0002] In overhead power line installation, post-type insulators are widely used to support the conductors, and these insulators are mostly made of ceramic materials. A post-type insulator consists of a post, multiple sheds stacked on the post, and a conductor connector fixed to the top of the post to secure the conductor. For lightning protection, an arc-starting electrode is typically installed on the conductor connector. During the discharge process, a large amount of heat is conducted to the fittings within the conductor connector. Because the casing of the conductor connector and the post it connects to are usually made of glass fiber reinforced ceramic, which has relatively poor thermal conductivity, the large amount of heat conducted to the fittings is not easily dissipated to the surrounding environment. During prolonged discharge, as the accumulated heat increases, the fittings are prone to overheating, reducing their mechanical properties and negatively impacting the conductor's fixation. Utility Model Content

[0003] This utility model provides a ceramic material post insulator that can suppress overheating of the hardware part located on the upper part of the post insulator, and promote the safe and reliable connection between the hardware part and the conductor.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a ceramic material column insulator, including a column, multiple sheds fixed on the column, and a conductor connector fixed on the upper part of the column. The conductor connector includes a hardware part and an insulating connecting block.

[0005] The lower end of the fitting is fixedly connected to the upper end of the insulating connecting block. A countersunk groove is formed on the upper end face of the insulating connecting block, and an annular radial flange is formed on the lower end of the fitting, and the radial flange can be inserted into the countersunk groove.

[0006] The lower end of the insulating connecting block has a threaded countersunk hole that connects to the upper end of the column.

[0007] The insulating connector is made of a plastic composite containing diamond particles.

[0008] Optionally, an axially extending pull rod is formed at the lower end of the fitting portion, and the end of the pull rod has an externally threaded section. An axially extending through hole is formed on the insulating connecting block and on the inner bottom surface of the countersunk groove. The pull rod passes through the through hole, so that the externally threaded section at its end extends into the threaded countersunk hole on the insulating connecting block and mates with a nut, thereby fixing the fitting portion and the insulating connecting block together.

[0009] Optionally, an elastic insulating pad is provided within the threaded countersunk hole of the insulating connector. The elastic insulating pad is made of a plastic composite containing diamond particles.

[0010] Optionally, at least one annular axial flange is formed on the lower end face of the fitting portion. Annular countersunk holes, corresponding one-to-one with the axial flanges, are formed on the bottom surface of the recess in the insulating connecting block. The axial flanges can be inserted into the annular countersunk holes.

[0011] Optionally, a plurality of radial through holes are provided on the side wall of the insulating connecting block, and screws or bolts are matched in the radial through holes to connect the axial flange to the insulating connecting block.

[0012] The conductor connector also includes an insulating sleeve, which is fitted over the insulating connector block to seal the radial through hole. The insulating sleeve is made of a plastic composite containing diamond particles.

[0013] The beneficial effects of this utility model are: it can suppress overheating of the fitting part located on the upper part of the post insulator, and promote the fit between the fitting part and the conductor to be maintained in a safe and reliable state. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of the matching structure between the column, the wire connection part and the insulating connection block.

[0016] Figure 3 This is a cross-sectional schematic diagram of the matching structure two between the column, the wire connection part and the insulating connection block.

[0017] In the diagram: 10 Column; 20 Umbrella skirt; 30 Fittings; 31 Radial flange; 32 Tie rod; 33 Axial flange; 40 Insulating connecting block; 50 Elastic insulating pad; 60 Insulating sleeve. Detailed Implementation

[0018] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0019] like Figures 1 to 3 The illustrated ceramic post-type insulator includes a post body 10, a plurality of sheds 20 fixedly disposed on the post body 10, and a conductor connector fixed to the upper part of the post body 10. The conductor connector includes a fitting portion 30 and an insulating connecting block 40. The lower end of the fitting portion 30 is fixedly connected to the upper end of the insulating connecting block 40.

[0020] A recessed groove is formed on the upper end face of the insulating connecting block 40, and an annular radial flange 31 is formed on the lower end of the fitting part 30. The radial flange 31 can be inserted into the recessed groove, and a large contact surface is formed between the fitting part 30 and the mating end of the insulating connecting block 40, which is conducive to the dispersion and transfer of heat.

[0021] The lower end of the insulating connecting block 40 has a threaded countersunk hole that connects to the upper end of the column 10.

[0022] The insulating connector 40 is made of a plastic composite containing diamond particles.

[0023] The ceramic post insulator made using the above structure has significant advantages, such as providing high thermal conductivity to the conductor connector while not guaranteeing good electrical insulation. Because there is a large contact surface between the fitting part 30 and the insulating connecting block 40, it facilitates the dispersal and transfer of heat conducted to the fitting part 30 to the insulating connecting block 40, increasing the heat conduction speed between them. Simultaneously, the insulating connecting block 40 is made of a plastic composite containing diamond particles, which has good thermal conductivity, helping to quickly transfer heat into space and increasing the heat dissipation rate of the fitting part 30, thus effectively preventing overheating of the fitting part 30.

[0024] The plastic composite comprises at least a matrix consisting of epoxy resin, polyamide or polyethylene, acrylonitrile-butadiene-styrene, etc., and may also include alumina particles, aluminum nitride particles, etc. The concentration of diamond particles in the plastic composite is generally controlled between 10 and 60% by volume.

[0025] A pull rod 32 extending axially is formed at the lower end of the fitting part 30, and the end of the pull rod 32 has an external thread section. An axial through hole is formed on the insulating connecting block 40 and on the inner bottom surface of the countersunk groove. The pull rod 32 passes through the through hole, and its external thread section extends into the threaded countersunk hole on the insulating connecting block 40, and mates with the nut, thereby fixing the fitting part 30 and the insulating connecting block 40 together.

[0026] An elastic insulating pad 50 is provided inside the threaded countersunk hole of the insulating connecting block 40. The elastic insulating pad 50 is made of a plastic composite containing diamond particles. The elastic insulating pad 50 not only fills the gap between the threaded countersunk hole and the column 10, but also disperses the heat transferred from the tie rod 32, thereby improving the heat dissipation capacity of the insulating connecting block 40.

[0027] To further increase the contact area between the fitting part 30 and the insulating connecting block 40 and improve the heat dissipation effect, an annular axial flange 33 is formed on the lower end face of the fitting part 30. An annular countersunk hole corresponding to and matching the axial flange 33 is formed on the bottom surface of the countersunk groove of the insulating connecting block 40. The axial flange 33 can be inserted into the annular countersunk hole. The axial flange 33 can be provided in multiple layers, but generally no more than three layers. If multiple layers of axial flange 33 are provided, the multiple layers of axial flange 33 can be coaxially distributed.

[0028] If the tie rod 33 is not provided, the following structure can be designed to fix the hardware part 30 and the insulating connecting block 40 together. That is, multiple radial through holes are distributed on the side wall of the insulating connecting block 40, and screws or bolts are matched in the radial through holes. The axial flange 33 is connected to the insulating connecting block 40 by means of screws or bolts to form a whole.

[0029] To ensure good insulation of the outer wall surface of the insulating connector 40, the conductor connector also includes an insulating sleeve 60, which is fixedly fitted onto the outside of the insulating connector 40 and can seal the radial through hole. The insulating sleeve 60 is made of a plastic composite containing diamond particles.

[0030] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit it. Many aspects of this utility model can be improved without departing from the overall concept. Those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A post insulator of ceramic material comprising a post, a plurality of shed skirts fixed to the post, and a conductor connection body fixed to an upper portion of the post; the conductor connection body comprising a fitting part; characterized in that: The wire connecting body further comprises an insulating connecting block; the lower end of the metal fitting part is fixedly connected with the upper end of the insulating connecting block; A sink is formed on the upper end surface of the insulating connecting block, a radial flange in the shape of a ring is formed on the lower end of the metal fitting part, and the radial flange can be inserted into the sink; a threaded hole is formed on the lower end of the insulating connecting block and is connected with the upper end of the column; the insulating connecting block is made of a plastic compound containing diamond particles.

2. A post insulator of a ceramic material according to claim 1, characterized in that: An axial pull rod is formed on the lower end of the metal fitting part, and an external thread section is formed on the end of the pull rod; an axial through hole is formed on the insulating connecting block and on the inner bottom surface of the sink; the pull rod passes through the through hole, and the external thread section on the end of the pull rod extends into the threaded hole on the insulating connecting block and matches with a nut, so as to fixedly connect the metal fitting part and the insulating connecting block together.

3. A post insulator of a ceramic material according to claim 2, characterized in that: An elastic insulating pad is arranged in the threaded hole of the insulating connecting block; the elastic insulating pad is made of a plastic compound containing diamond particles.

4. A post insulator of a ceramic material according to any one of claims 1 to 3, characterized in that: At least one layer of axial flanges in the shape of a ring is formed on the lower end surface of the metal fitting part; ring-shaped threaded holes corresponding to the axial flanges are formed on the inner bottom surface of the sink of the insulating connecting block; the axial flanges can be inserted into the ring-shaped threaded holes.

5. A post insulator of a ceramic material according to claim 4, characterized in that: A plurality of radial through holes are distributed on the side wall of the insulating connecting block, and screws or bolts are arranged in the radial through holes to connect the axial flanges and the insulating connecting block; the wire connecting body further comprises an insulating sleeve made of a plastic compound containing diamond particles; the insulating sleeve is sleeved on the outside of the insulating connecting block and can block the radial through holes.

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