12kV pillar type insulator with high bending resistance and tensile property

Abstract

The invention relates to a 12kV pillar type insulator with high bending resistance and tensile property, which comprises an insulator body, and the insulator body adopts a large-diameter pillar type structure and can effectively resist external mechanical stress. And the high-strength fiber material is embedded into the insulator body to form a composite structure, so that the tensile property can be remarkably improved. The connection part of the insulator body and the power distribution cabinet adopts a flange structure, so that firm and reliable connection can be ensured. Multiple sealing structures are arranged on the periphery of the insulator body so as to prevent moisture from invading, and the insulation performance is guaranteed. The defect that a traditional insulator is insufficient in bending resistance and tensile property is overcome, key parts of the product are made of advanced reinforced composite insulating materials, the bending resistance and tensile property of the product are improved by optimizing the structural design of the insulator, and safe and stable operation of an electric power system is ensured. By optimizing structural design, material selection, connection design, bending resistance and tensile property, safe and stable operation of a power system is ensured.

Description

Technical Field

[0001] The invention relates to an insulator in a power system, in particular to a 12kV post type insulator. Background Art

[0002] In the power system, the medium-voltage distribution cabinet is a key equipment for power transmission and distribution. With the growth of power demand, the performance requirements for key components in the distribution cabinet are also increasing. Traditional insulators often bend and break under high voltage and complex stress environments, affecting the stable operation of the power system. Therefore, it is necessary to design a new type of pillar insulator with large diameter, high bending resistance and tensile strength to meet the use requirements of large-size busbar medium-voltage distribution cabinets.

[0003] In order to meet the electrical insulation requirements of the switchgear, the post insulators have the following requirements:

[0004] (1) The surface of the workpiece should be smooth, bright, without any marks or mechanical damage;

[0005] (2) The parts are not allowed to have defects such as shrinkage holes, pores, cracks, stress concentration, etc.

[0006] (3) The threaded insert is positioned correctly and without looseness, and the bottom surface of the insert must be inside the end surface;

[0007] (4) The surface of the product should withstand a power frequency withstand voltage of 60kV for 1 minute without breakdown or flashover;

[0008] (5) The color is dark red, and the partial discharge is no more than 3pC;

[0009] (6) When installed horizontally on one side, a pressure of 10 kN is applied above the outer end surface and the workpiece should not be damaged.

[0010] Traditional insulators often bend, break, and other problems when subjected to high voltage and complex stress environments, affecting the stable operation of the power system.

[0011] This application aims to solve the above problems and ensure the safe and stable operation of the power system by optimizing structural design, material selection, connection design, bending resistance and tensile resistance. Summary of the invention

[0012] The present invention aims to provide a 12kV post insulator with high bending and tensile performance to solve the defects of insufficient bending and tensile performance of traditional insulators. The key parts of the product adopt advanced reinforced composite insulation materials, and the structural design of the insulator is optimized to improve its bending and tensile performance, thereby ensuring the safe and stable operation of the power system.

[0013] To achieve the above-mentioned purpose, the technical solution of the present invention is: a 12kV high bending and tensile performance pillar insulator, including an insulator body, the insulator body adopts a large-diameter pillar structure, which can effectively resist external mechanical stress; high-strength fiber material is embedded in the insulator body to form a composite structure, which can significantly improve the tensile performance.

[0014] Furthermore, the connection between the insulator body and the distribution cabinet adopts a flange structure, which can ensure a firm and reliable connection.

[0015] Furthermore, multiple sealing structures are arranged on the outer periphery of the insulator body to prevent moisture intrusion and ensure insulation performance.

[0016] Furthermore, the insulator body material adopts high-performance epoxy resin with excellent insulation performance and mechanical strength, and the surface is processed for weather resistance and anti-fouling properties.

[0017] Furthermore, multiple threaded inserts are embedded at both ends of the insulator body, which are connected to the busbars in the medium-voltage distribution cabinet of 12kV and below, or between the busbar and the sheet metal bracket through the threaded inserts; to ensure the safe operation of the copper busbar when a large current is passed through the busbar.

[0018] Furthermore, the 12kV high bending and tensile performance post insulator optimizes the structural size and shape of the insulator through finite element analysis, reduces stress concentration points, and improves the overall bending performance.

[0019] Furthermore, the surface of the 12kV high bending and tensile performance post insulator can withstand a power frequency withstand voltage of 60kV for 1 minute without breakdown or flashover.

[0020] Furthermore, the 12kV high bending and tensile performance post insulator is dark red in color, and the partial discharge is no more than 3pC.

[0021] The beneficial effects of the present invention are:

[0022] (1) Greatly improve the bending and tensile properties, and enhance the stability under different stress conditions;

[0023] (2) Structural optimization design to reduce stress concentration and extend service life;

[0024] (3) Selection of high-performance materials and special processing technology to improve insulation performance and weather resistance;

[0025] (4) Special connection method and sealing structure ensure a firm and reliable connection and prevent moisture intrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of a 12kV high bending and tensile performance post insulator of the present invention;

[0027] Figure 2 This is a front view of a 12kV high bending and tensile performance post insulator of the present invention;

[0028] Figure 3 yes Figure 2 Left view of

[0029] Figure 4 yes Figure 2 Top view of the . DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figures 1 to 4 As shown, a 12kV post insulator suitable for a medium voltage distribution cabinet of the present invention comprises an insulator body 1. The insulator body 1 adopts a large-diameter post structure, and the overall structure is strong and can effectively resist external mechanical stress. The connection part between the insulator body 1 and the distribution cabinet adopts a flange structure 2 to ensure a firm and reliable connection. At the same time, a multiple sealing structure 4 is provided to prevent moisture intrusion and ensure insulation performance.

[0032] Preferably, the interior of the insulator body 1 is made of high-strength material to further enhance the bending resistance. Specifically, a high-strength fiber material is embedded in the insulator body 1 to form a composite structure, which significantly improves the tensile resistance.

[0033] Preferably, the insulator body 1 is made of high-performance epoxy resin, which has excellent insulation performance and mechanical strength. At the same time, the surface is treated with a special process to improve weather resistance and anti-fouling properties.

[0034] Preferably, the insulator body 1 is connected between busbars or between busbars and sheet metal brackets in a medium-voltage distribution cabinet of 12kV and below through four mounting threaded inserts 3 at both ends; to ensure safe operation of the copper busbar when a large current is passed through the busbar.

[0035] Preferably, the 12kV post insulator optimizes the structural size and shape of the insulator through finite element analysis, reduces stress concentration points, and improves the overall bending resistance.

[0036] The 12kV post insulator products adopting the above technical solution can meet the following technical requirements:

[0037] (1) The surface of the workpiece should be smooth, bright, without any marks or mechanical damage;

[0038] (2) The parts are not allowed to have defects such as shrinkage holes, pores, cracks, stress concentration, etc.

[0039] (3) The threaded insert is positioned correctly and without looseness, and the bottom surface of the insert must be inside the end surface;

[0040] (4) The surface of the product should withstand a power frequency withstand voltage of 60kV for 1 minute without breakdown or flashover;

[0041] (5) The color is dark red, and the partial discharge is no more than 3pC;

[0042] (6) When installed horizontally on one side, a pressure of 10 kN is applied above the outer end surface and the workpiece should not be damaged.

[0043] Specific application methods and requirements of the present invention:

[0044] (1) Installation must be performed according to the specified bolt torque table;

[0045] (2) The installation space should be within the range of 150±0.5mm.

Claims

1. A 12kV high bending and tensile performance post insulator, characterized by: It includes an insulator body, which adopts a large-diameter pillar-type structure and can effectively resist external mechanical stress; high-strength fiber materials are embedded inside the insulator body to form a composite structure, which can significantly improve the tensile performance.

2. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: The connection between the insulator body and the distribution cabinet adopts a flange structure to ensure a firm and reliable connection.

3. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: Multiple sealing structures are arranged on the outer periphery of the insulator body to prevent moisture intrusion and ensure insulation performance.

4. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: The insulator body material adopts high-performance epoxy resin with excellent insulation performance and mechanical strength, and the surface is treated with weather resistance and anti-fouling technology.

5. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: Multiple threaded inserts are embedded at both ends of the insulator body, which are connected to the busbars in the medium-voltage distribution cabinet of 12kV and below, or between the busbar and the sheet metal bracket through the threaded inserts to ensure the safe operation of the copper busbar when a large current is passed through the busbar.

6. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: 12kV high bending and tensile performance post insulator optimizes the structural size and shape of the insulator through finite element analysis, reduces stress concentration points, and improves the overall bending performance.

7. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: The surface of the 12kV high bending and tensile performance post insulator can withstand a power frequency withstand voltage of 60kV for 1 minute without breakdown or flashover.

8. The 12kV high bending and tensile performance post insulator according to claim 1 is characterized in that: The 12kV high bending and tensile performance post insulator is dark red in color, and the partial discharge is no more than 3pC.

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