A corrosion-resistant suspension insulator for ultra-high voltage transmission lines

Abstract

The invention relates to the technical field of electric power system, and specifically discloses a corrosion-resistant suspension insulator for ultra-high voltage transmission lines, comprising an shed, a metal cap, a metal foot and an insulating core rod arranged inside the shed, wherein the shed is in an annular structure as a whole, and the shed is in a plurality of groups in a combination of upper and lower butt-jointed structures; the metal cap is connected to the shed at the top layer, and the metal foot is connected to the shed at the bottom layer; a connecting seat is provided on the metal cap, a connecting groove is provided in the connecting seat, and the connecting groove is connected to the metal shed body through a threaded structure; a metal foot body is fixed to the lower side of the metal foot, and the metal foot body is arranged in an inverted truncated cone structure; the shed is made of corrosion-resistant ceramic material, and the insulating core rod is made of the same material as the shed; the insulator provided by the invention can flexibly adjust the size through the combined structure, and can effectively extend the service life of the overall structure through the corrosion-resistant material.

Description

Technical Field

[0001] The invention relates to the technical field of power systems, and in particular to a corrosion-resistant suspension insulator for an ultra-high voltage transmission line. Background Art

[0002] In the existing power technology, insulators are the most commonly used equipment in the power industry. They are mainly used to be erected on electric poles and used for one end of high-voltage wire connection towers. Suspension insulators are a common type of insulator, generally composed of insulating parts (such as porcelain parts, glass parts) and metal accessories (such as steel feet, iron caps, flanges, etc.). Existing insulators, such as those provided in application numbers: CN201820280031.0 (a suspension porcelain insulator), CN201420342591.6 (a suspension insulator), and CN202121597778.7 (a high-performance cylindrical head suspension porcelain insulator with internal and external wires), are all fixed structures, and the product size cannot be changed according to actual conditions, which is inconvenient in practical applications; at the same time, since most insulators are set up in the open air and are in direct contact with external rain and snow, the surface is easily eroded by rain and snow after a certain period of use, resulting in structural damage and affecting use. Summary of the invention

[0003] The object of the present invention is to provide a corrosion-resistant suspension insulator for ultra-high voltage transmission lines to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a corrosion-resistant suspension insulator for an ultra-high voltage transmission line, comprising an shed, a metal cap, a metal foot and an insulating core rod arranged inside the shed, the shed being annular in structure as a whole, and being provided in a plurality of groups in a combination of upper and lower butt-jointed structures; the metal cap is connected to the shed on the top layer, and the metal foot is connected to the shed on the bottom layer; a connecting seat is provided on the metal cap, a connecting groove is provided in the connecting seat, and the connecting groove is connected to the metal shed body through a threaded structure; a metal foot body is fixed to the lower side of the metal foot, and the metal foot body is provided in an inverted truncated cone structure; the shed is made of corrosion-resistant ceramic material, and the insulating core rod is made of the same material as the shed.

[0005] Preferably, the umbrella skirt is configured as a truncated cone structure as a whole, the upper part of which is configured as an inclined surface of the truncated cone, and the lower part is configured as a horizontal surface; the angle of the inclined surface of the umbrella skirt is 8°~15°, and a sealing gasket is arranged between adjacent umbrella skirts, and the sealing gasket is made of rubber material.

[0006] Preferably, a limiting block is provided on the inner side of the annular shape of the umbrella skirt, and a limiting groove is correspondingly provided on the surface of the insulating core rod, and the limiting block and the limiting groove are engaged with each other.

[0007] Preferably, three limit blocks are evenly arranged around the inner wall of the umbrella skirt, and the limit blocks are arranged in a trapezoidal structure, and the shape and size of the limit grooves match the trapezoidal structure.

[0008] Preferably, both ends of the insulating core rod are respectively provided with threaded heads, which are connected to the metal cap skirt and the metal foot skirt respectively through the threaded heads.

[0009] Preferably, the present invention also provides a method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line, comprising the following steps:

[0010] S1. Weigh the raw materials according to the following weight components: 26-35 parts of potassium feldspar, 15-25 parts of aluminum oxide, 5-12 parts of talc, 3-12 parts of Xingzi kaolin, 6-8 parts of Zuoyun clay, 1-6 parts of zirconium silicate, and 1-6 parts of Xinhui clay;

[0011] S2, grinding the raw materials in step S1 with a pulverizer, adding water and mixing to obtain a viscous slurry;

[0012] S3, extruding the slurry obtained in step S2 in a vacuum mud kneader, and drying and molding in a mold to obtain a rough blank;

[0013] S4, sintering the rough blank obtained in step S3 to obtain sheds and insulating core rods;

[0014] S5, trimming the surfaces of the shed and the insulating core rod obtained in step S4, and applying anti-corrosion paint on the outer sides of the shed and the insulating core rod to form an anti-corrosion coating;

[0015] S6. Pre-assemble the insulating core rod and the metal foot skirt. After assembly, put the umbrella skirt on the insulating core rod in sequence, and finally complete the assembly of the metal cap skirt on the top layer.

[0016] Preferably, in step S2, the powder material obtained by the pulverizer is filtered through a 60-100 mesh sieve and is fully pulverized to ensure that all of the powder passes through the sieve.

[0017] Preferably, in step S5, the obtained shed is processed with a limit block, the obtained insulating core rod is processed with a limit groove, and thread heads are processed at both ends of the insulating core rod.

[0018] Preferably, in step S5, the anti-corrosion coating is acrylic anti-corrosion coating.

[0019] Preferably, in step S6, sealing pads are provided on the upper and lower sides of the shed when the shed is assembled.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the insulator provided by the present invention can flexibly adjust the size through the modular structure, and the overall corrosion resistance is increased by combining materials and corrosion-resistant coatings, thereby effectively extending the service life of the overall structure; and the overall structure is relatively simple, easy to assemble, and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the umbrella skirt structure of the present invention;

[0023] Figure 3 A top view of the umbrella skirt of the present invention;

[0024] Numbers in the figure: 1, umbrella skirt; 2, metal cap skirt; 3, metal foot skirt; 4, insulating core rod; 5, connecting seat; 6, metal foot body; 7, connecting groove; 8, limiting groove; 9, sealing gasket; 10, limiting block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-3The present invention provides a technical solution: a corrosion-resistant suspension insulator for an ultra-high voltage transmission line, comprising an shed 1, a metal cap shed 2, a metal foot shed 3 and an insulating core rod 4 arranged inside the shed shed 1, wherein the shed shed 1 is annular in structure as a whole, and the shed shed 1 is provided with a plurality of groups in a combination of upper and lower butt-jointed structures; the metal cap shed 2 is connected to the top shed 1, and the metal foot shed 3 is connected to the bottom shed 1; a connecting seat 5 is provided on the metal cap shed 2, a connecting groove 7 is provided in the connecting seat 5, and the connecting groove 7 is connected to the metal cap body through a threaded structure; a metal foot body 6 is fixed to the lower side of the metal foot shed 3, and the metal foot body 6 is arranged in an inverted truncated cone structure; the shed 1 is made of corrosion-resistant ceramic material, and the insulating core rod 4 is made of the same material as the shed 1.

[0029] Furthermore, the umbrella skirt 1 is configured as a truncated cone structure as a whole, the upper part of which is configured as an inclined surface of the truncated cone, and the lower part is configured as a horizontal surface; the angle of the inclined surface of the umbrella skirt 1 is 8°~15°, and a sealing gasket 9 is provided between adjacent umbrella skirts 1, and the sealing gasket 9 is made of rubber material.

[0030] Furthermore, a limiting block 10 is provided on the inner side of the annular shape of the umbrella skirt 1, and a limiting groove 8 is correspondingly provided on the surface of the insulating core rod 4, and the limiting block 10 and the limiting groove 8 are engaged with each other.

[0031] Furthermore, three limit blocks 10 are evenly arranged around the inner wall of the umbrella skirt 1, and the limit blocks 10 are arranged as a trapezoidal structure, and the shape and size of the limit groove 8 match it.

[0032] Furthermore, both ends of the insulating core rod 4 are provided with threaded heads, which are connected to the metal cap skirt 2 and the metal foot skirt 3 respectively through the threaded heads.

[0033] Furthermore, the present invention also provides a method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line, comprising the following steps:

[0034] S1. Weigh the raw materials according to the following weight components: 26-35 parts of potassium feldspar, 15-25 parts of aluminum oxide, 5-12 parts of talc, 3-12 parts of Xingzi kaolin, 6-8 parts of Zuoyun clay, 1-6 parts of zirconium silicate, and 1-6 parts of Xinhui clay;

[0035] S2, grinding the raw materials in step S1 with a pulverizer, adding water and mixing to obtain a viscous slurry;

[0036] S3, extruding the slurry obtained in step S2 in a vacuum mud kneader, and drying and molding in a mold to obtain a rough blank;

[0037] S4, sintering the rough blank obtained in step S3 to obtain the shed 1 and the insulating core rod 4;

[0038] S5, trimming the surfaces of the shed 1 and the insulating core rod 4 obtained in step S4, and applying anti-corrosion paint on the outer sides of the shed 1 and the insulating core rod 4 to form an anti-corrosion coating;

[0039] S6. Pre-assemble the insulating core rod 4 and the metal foot skirt 3. After the assembly, put the umbrella skirt 1 on the insulating core rod 4 in sequence, and finally complete the assembly of the metal cap skirt 2 on the top layer.

[0040] Furthermore, in step S2, the powder material obtained by the pulverizer is filtered through a 60-100 mesh sieve and fully pulverized to ensure that all of it passes through the sieve.

[0041] Furthermore, in step S5, the obtained shed 1 is processed with a limit block 10, the obtained insulating core rod 4 is processed with a limit groove 8, and thread heads are processed at both ends of the insulating core rod 4.

[0042] Furthermore, in step S5, the anti-corrosion coating is acrylic anti-corrosion coating.

[0043] Furthermore, in step S6, sealing pads 9 are provided on the upper and lower sides of the shed 1 when the shed 1 is assembled.

[0044] Working principle: The number of sheds 1 can be adjusted according to the size of the insulating core rod 4, and the structure can be temporarily assembled on site through insulating core rods 4 of various specifications. The insulating core rod 4 and sheds 1 are both made of corrosion-resistant ceramic materials. The raw materials have good corrosion resistance and physical properties. They are crushed to form a slurry, then dried and formed by a mold, and finally sintered. Anti-corrosion paint is applied on the outside to form an anti-corrosion coating, which effectively improves the corrosion resistance of the structure.

[0045] During assembly, the insulating core rod 4 is pre-assembled with the metal foot skirt 3, and then the umbrella skirt 1 is put on the core rod according to the insulating core rod 4. The umbrella skirt 1 is stuck in the limiting groove 8 of the core rod through the inner limiting block 10, so that the two are stuck to each other to avoid rotation and ensure the stability of the structure; at the same time, sealing pads 9 are arranged on the upper and lower sides of the umbrella skirt 1, on the one hand, to avoid rigid contact between the umbrella skirts 1, between the umbrella skirt 1 and the metal cap skirt 2, and between the umbrella skirt 1 and the metal foot skirt 3, thereby playing a role of buffering protection, and at the same time sealing the contact parts to prevent external water from entering the interior of the umbrella skirt 1.

[0046] The limit block 10 is set to a trapezoidal structure, which is easier to engage with the limit groove 8. The two ends of the insulating core rod 4 are connected to the metal cap skirt 2 and the metal foot skirt 3 through threaded heads respectively; the metal cap skirt 2 is connected to the metal cap body through the connecting groove 7 in the connecting seat 5, and can be used to install metal caps of different shapes. The upper surface of the umbrella skirt 1 is set to an inclined round table surface, which has a certain guiding effect, facilitating the sliding of rainwater or dust and debris to avoid accumulation.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant suspension insulator for ultra-high voltage transmission lines, characterized in that: The invention comprises an umbrella skirt (1), a metal cap skirt (2), a metal foot skirt (3), and an insulating core rod (4) arranged inside the umbrella skirt (1); the umbrella skirt (1) is an annular structure as a whole, and the umbrella skirt (1) is a plurality of groups of upper and lower butt-jointed structures; the metal cap skirt (2) is connected to the top umbrella skirt (1), and the metal foot skirt (3) is connected to the bottom umbrella skirt (1); a connecting seat (5) is arranged on the metal cap skirt (2), a connecting groove (7) is arranged in the connecting seat (5), and the connecting groove (7) is connected to the metal cap body through a thread structure; a metal foot body (6) is fixed on the lower side of the metal foot skirt (3), and the metal foot body (6) is arranged in an inverted truncated cone structure; the umbrella skirt (1) is made of corrosion-resistant ceramic material, and the insulating core rod (4) is made of the same material as the umbrella skirt (1); The umbrella skirt (1) is configured as a truncated cone structure as a whole, the upper part of which is configured as an inclined surface of the truncated cone, and the lower part of which is configured as a horizontal surface; the angle of the inclined surface of the umbrella skirt (1) is 8° to 15°, and a sealing gasket (9) is provided between adjacent umbrella skirts (1), and the sealing gasket (9) is made of a rubber material; A limiting block (10) is provided on the inner side of the annular shape of the umbrella skirt (1), and a limiting groove (8) is correspondingly provided on the surface of the insulating core rod (4), and the limiting block (10) and the limiting groove (8) are mutually engaged; Three limit blocks (10) are evenly arranged around the inner wall of the umbrella skirt (1), and the limit blocks (10) are arranged as a trapezoidal structure, and the shape and size of the limit grooves (8) match the trapezoidal structure.

2. The corrosion-resistant suspension insulator for ultra-high voltage transmission lines according to claim 1, characterized in that: The insulating core rod (4) is provided with threaded heads at both ends, respectively, and is connected to the metal cap skirt (2) and the metal foot skirt (3) via the threaded heads.

3. The method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line according to claim 1 or 2, characterized in that: The steps include: S1. Weigh the raw materials according to the following weight components: 26-35 parts of potassium feldspar, 15-25 parts of aluminum oxide, 5-12 parts of talc, 3-12 parts of Xingzi kaolin, 6-8 parts of Zuoyun clay, 1-6 parts of zirconium silicate, and 1-6 parts of Xinhui clay; S2, grinding the raw materials in step S1 with a pulverizer, adding water and mixing to obtain a viscous slurry; S3, extruding the slurry obtained in step S2 in a vacuum mud kneader, and drying and molding in a mold to obtain a rough blank; S4, sintering the rough blank obtained in step S3 to obtain a shed (1) and an insulating core rod (4); S5, trimming the surfaces of the shed (1) and the insulating core rod (4) obtained in step S4, and applying an anti-corrosion coating on the outer sides of the shed (1) and the insulating core rod (4) to form an anti-corrosion coating; S6. The insulating core rod (4) and the metal foot skirt (3) are assembled in advance. After the assembly, the umbrella skirt (1) is sequentially put on the insulating core rod (4), and finally the metal cap skirt (2) is assembled on the top layer.

4. The method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line according to claim 3, characterized in that: In the step S2, the powder material obtained by the pulverizer is filtered through a 60-100 mesh sieve and fully pulverized to ensure that all of the powder material passes through the sieve.

5. The method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line according to claim 3, characterized in that: In the step S5, the obtained shed (1) is processed with a limit block (10), the obtained insulating core rod (4) is processed with a limit groove (8), and thread heads are processed at both ends of the insulating core rod (4).

6. The method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line according to claim 3, characterized in that: In step S5, the anti-corrosion coating is acrylic anti-corrosion coating.

7. The method for preparing a corrosion-resistant suspension insulator for an ultra-high voltage transmission line according to claim 3, characterized in that: In the step S6, sealing pads (9) are arranged on the upper and lower sides of the shed (1) when the shed (1) is assembled.

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