Electric insulator convenient for introducing electric wire and electric wire

Abstract

The utility model discloses an electrical insulator convenient to lead in an electric wire and the electric wire, comprising an insulating seat for the electric wire to enter, the middle part of the insulating seat is provided with a threading hole, both ends of the threading hole are provided with positioning rings, and the positioning rings are fixedly provided with a plurality of lead assemblies; a fastening bushing is also arranged in the threading hole; a plurality of jacks are arranged around the threading hole on the insulating seat, and insulating sleeves are arranged in the plurality of jacks; according to the utility model, the arc-shaped groove design of the lead roller is combined with a rotatable structure, so that the frictional resistance during wire threading is effectively reduced, an insulating layer is prevented from being scratched, the plurality of concentrically arranged lead assemblies form progressive guidance, the bending stress of the wire is dispersed, and local deformation is prevented; the fastening lining is arranged in the threading hole, radial pressing is achieved through the inner diameter difference, physical clamping is formed in cooperation with the cambered surface structure of the positioning ring, the wire fixing stability is guaranteed, and damage to the insulating layer caused by hard extrusion is avoided.

Description

Technical Field

[0001] This utility model specifically relates to an electrical insulator and a wire that facilitates the introduction of electrical wires. Background Technology

[0002] Electrical insulators are materials or devices used to prevent the flow of electric current. They are widely used in power systems, electronic equipment, industrial wiring and other fields. Their core functions are to isolate conductors, prevent leakage, ensure safety, and ensure the efficient transmission of electrical energy.

[0003] During electrical engineering construction, because the diameter of the conduit hole should match the outer diameter of the wire or cable, it is difficult to align the wire or cable with the conduit hole when inserting it, and the insertion process is difficult, which delays the construction progress. In addition, the wire is often scratched by the cut of the metal conduit during the installation, especially after the wire insulation layer is scratched, which can lead to short circuits or leakage.

[0004] Therefore, it is necessary to invent an electrical insulator and a wire that facilitates the introduction of wires 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 an electrical insulator and an electrical wire that facilitate the introduction of the wire into the electrical insulator.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an electrical insulator that facilitates the introduction of wires, including an insulating base for the wire to enter, wherein a wire-passing hole is provided in the middle of the insulating base, and positioning rings are installed at both ends of the wire-passing hole, and multiple lead wire assemblies are fixed on the positioning rings.

[0009] A fastening bushing is also provided inside the threading hole;

[0010] Multiple lead wire assemblies are arranged concentrically and at uniform intervals on the positioning ring;

[0011] The insulating base is also provided with multiple insertion holes around the wire hole, and each insertion hole is provided with an insulating sleeve.

[0012] Preferably, each set of lead wire assemblies includes two sets of fixing posts fixed to the top plane of the positioning ring. Each set of fixing posts has a mounting ear extending from its top. The mounting ear has a rotating hole. A rotating shaft is installed between the rotating holes on the two sets of mounting ears. Each end of the rotating shaft has a limiting ring positioned opposite the mounting ear. A lead wire roller is mounted on the rotating shaft.

[0013] Preferably, the lead roller has multiple evenly spaced arc-shaped grooves, which transversely penetrate the outer surface of the lead roller. The connecting surfaces between adjacent arc-shaped grooves are all arc surfaces, and the overall length of the lead roller is less than the overall length of the rotating shaft.

[0014] Preferably, in the plurality of lead wire assemblies, the lead wire roller is positioned beyond the inner side of the wire threading hole, and its foremost end matches the installation position of the fastening bushing.

[0015] Preferably, the inner diameter of the fastening bushing is smaller than the overall inner diameter of the threading hole, the inner depth of the fastening bushing is smaller than the inner depth of the threading hole, and both the top side of the fastening bushing and the positioning ring are arc surfaces.

[0016] Preferably, the insulating sleeve is fitted onto the inner wall of the socket, with both ends of the insulating sleeve located outside the two ends of the socket, and both ends of the insulating sleeve being arc-shaped.

[0017] An electrical wire comprising the electrical insulator described in any of the preceding claims.

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

[0019] 1. The arc groove design of the lead roller in this utility model, combined with the rotatable structure, effectively reduces the frictional resistance when the wire is threaded through, avoids scratching the insulation layer, and the multiple concentrically arranged lead components form a progressive guide, which disperses the bending stress of the wire and prevents local deformation.

[0020] 2. This utility model uses a fastening bushing inside the wire hole to achieve radial compression through the difference in inner diameter. Combined with the arc-shaped structure of the positioning ring, it forms a physical locking position, which not only ensures the stability of the wire fixation but also avoids damage to the insulation layer caused by hard compression. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the overall structure and wire installation of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the disassembled structure of the lead wire assembly of this utility model.

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

[0027] 1. Insulating base; 11. Wire hole; 12. Positioning ring; 13. Fastening bushing; 14. Insertion hole; 2. Lead wire assembly; 21. Fixing post; 22. Mounting ear; 23. Rotating hole; 24. Rotating shaft; 25. Limiting ring; 26. Lead wire roller; 27. Arc groove; 3. Insulating sleeve. 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 1-4 The electrical insulator shown is designed to facilitate the introduction of electrical wires. It includes an insulating base 1 for the wire to enter, a wire-passing hole 11 is provided in the middle of the insulating base 1, and positioning rings 12 are installed at both ends of the wire-passing hole 11. Multiple lead wire assemblies 2 are fixed on the positioning rings 12.

[0030] Specifically, a fastening bushing 13 is also provided inside the wire hole 11;

[0031] Specifically, multiple lead wire assemblies 2 are concentrically arranged and evenly spaced on the positioning ring 12;

[0032] Specifically, the insulating base 1 is provided with a plurality of insertion holes 14 around the wire hole 11, and an insulating sleeve 3 is provided in the plurality of insertion holes 14.

[0033] In this embodiment, an insulating base 1 is injection molded from high-strength insulating material, with a through-hole 11 machined in its center. The diameter of the hole is designed to be stepped according to the wire specifications. Positioning rings 12 are fixed to both ends of the through-hole 11 by heat pressing or snap-fitting. The inner side of the positioning rings 12 is coaxial with the through-hole 11. The stepped through-hole 11 is compatible with different wire diameters, and the fixing of the positioning rings 12 ensures the installation reference accuracy of the lead assembly 2, avoiding stress concentration caused by eccentricity.

[0034] Specifically, each set of lead wire assembly 2 includes two sets of fixing posts 21 fixed to the top plane of the positioning ring 12. Each set of fixing posts 21 has a mounting ear 22 extending from its top. The mounting ear 22 has a rotating hole 23. A rotating shaft 24 is installed between the rotating holes 23 on the two sets of mounting ears 22. Both ends of the rotating shaft 24 are provided with limiting rings 25. The limiting rings 25 are placed on the opposite side of the mounting ear 22. A lead wire roller 26 is installed on the rotating shaft 24.

[0035] In this embodiment, two sets of fixing posts 21 are fixed to the top plane of the positioning ring 12 by screws. The top of the fixing post 21 is integrally formed with mounting ears 22, and the distance between the two mounting ears 22 is slightly greater than the length of the lead roller 26.

[0036] Insert the rotating shaft 24 into the rotating hole 23 of the mounting ear 22, and install limit rings 25 at both ends (using open snap rings or threaded locking) to ensure that the rotating shaft 24 is axially fixed but can rotate freely.

[0037] The lead roller 26 is fitted into the middle of the rotating shaft 24. A transversely penetrating arc-shaped groove 27 is machined on its surface, with a groove depth of 0.5-1 mm and a spacing between adjacent grooves equal to 1.2 times the groove width. The lead roller 26 can adaptively rotate as the wire is inserted. The arc-shaped groove 27 provides multi-point flexible contact, reducing the coefficient of friction by more than 60% and preventing wire twisting.

[0038] Specifically, the lead roller 26 has multiple evenly spaced arc-shaped grooves 27, which transversely penetrate the outer surface of the lead roller 26. The connecting surfaces between adjacent arc-shaped grooves 27 are all arc surfaces, and the overall length of the lead roller 26 is less than the overall length of the rotating shaft 24.

[0039] Specifically, the lead roller 26 in the multiple lead assembly 2 is positioned beyond the inside of the wire hole 11, and its foremost end matches the installation position of the fastening bushing 13.

[0040] Specifically, the inner diameter of the fastening bushing 13 is smaller than the overall inner diameter of the wire hole 11, the inner depth of the fastening bushing 13 is smaller than the inner depth of the wire hole 11, and both the top side of the fastening bushing 13 and the positioning ring 12 are curved surfaces.

[0041] Specifically, the insulating sleeve 3 is fitted onto the inner wall of the socket 14, with both ends of the insulating sleeve 3 located on the outer sides of the socket 14, and both ends of the insulating sleeve 3 are arc-shaped.

[0042] An electrical wire comprising any of the above-mentioned electrical insulators.

[0043] In this embodiment, a silicone rubber fastening bushing 13 is embedded in the center of the wire hole 11. Its inner diameter is smaller than that of the wire hole 11, and its depth is one-third of the total depth of the wire hole 11. The outer end of the fastening bushing 13 is machined with a 30° chamfered arc surface, forming a smooth transition with the top arc surface of the positioning ring 12. When the wire passes through, the silicone rubber bushing undergoes elastic deformation, generating a radial clamping force, which prevents loosening and avoids insulation layer indentation caused by metal clamps.

[0044] In this embodiment, four symmetrically distributed insertion holes 14 are machined around the wire hole 11 on the insulating base 1. The hole diameter is 0.2mm larger than that of a standard terminal block. A polytetrafluoroethylene (PTFE) insulating sleeve 3 is pressed into the insertion hole 14, with its two ends turned outward to form an arc-shaped edge with a radius of 1mm, extending 2-3mm beyond the end face of the insertion hole. The bidirectional extension structure of the insulating sleeve 3 increases the creepage distance to 1.5 times the standard value, and the outward-turned arc-shaped edge eliminates the risk of corner discharge, increasing the withstand voltage rating to over 10kV.

[0045] In this embodiment, the front end of the lead roller 26 extends 1-2mm into the inner wall of the wire-passing hole 11, flush with the inlet of the fastening bushing 13. A 3-5mm clearance section is reserved at both ends of the rotating shaft 24 to allow the lead roller 26 to float axially. This supports the introduction of wires with a deflection angle of ≤45°. The floating of the lead roller 26 compensates for installation errors and adapts to space constraints in complex wiring scenarios.

[0046] In this embodiment, the rotational friction coefficient of the lead roller 26 is less than 0.1. Combined with the guiding effect of the arc groove 27, the threading time of a single wire is shortened to within 3 seconds, improving efficiency by 40% compared to traditional wire threaders. The interference fit design of the fastening bushing 13 maintains a seal when the wire is stationary. When the wire is moved by external force, the elastic recovery properties of the silicone rubber maintain a continuous clamping force, achieving the required waterproof rating. The three concentrically arranged lead assemblies 2 control the bending radius of the wire to within 8 times the wire diameter, ensuring that the core wire tension difference in multi-core cables is less than 5%, preventing tearing of the sheath layer. The standardized design of the socket 14 allows direct insertion into the terminal block or fixing bolt, and the heat-shrinkable properties of the matching insulating sleeve 3 maintain a tight fit in environments ranging from -40℃ to 120℃. The detachable design of the limiting ring 25 allows for quick replacement of damaged lead rollers 26 without the need for complete disassembly of the insulating base 1, reducing maintenance time.

[0047] 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. An electrical insulator that facilitates the introduction of electrical wires, characterized in that: The device includes an insulating base (1) into which the wire enters. The insulating base (1) has a wire hole (11) in the middle. Positioning rings (12) are installed at both ends of the wire hole (11), and multiple lead wire assemblies (2) are fixed on the positioning rings (12). The thread hole (11) is also provided with a fastening bushing (13); Multiple lead wire assemblies (2) are concentrically arranged and evenly spaced on the positioning ring (12); The insulating base (1) is provided with a plurality of insertion holes (14) around the wire hole (11), and an insulating sleeve (3) is provided in the plurality of insertion holes (14).

2. The electrical insulator for easy insertion of wires according to claim 1, characterized in that: Each set of lead wire assemblies (2) includes two sets of fixing posts (21) fixed to the top plane of the positioning ring (12). Each set of fixing posts (21) has a mounting ear (22) extending from the top. The mounting ear (22) has a rotating hole (23). A rotating shaft (24) is installed between the rotating holes (23) on the two sets of mounting ears (22). Both ends of the rotating shaft (24) are provided with limiting rings (25). The limiting rings (25) are placed on the opposite side of the mounting ear (22). A lead wire roller (26) is installed on the rotating shaft (24).

3. An electrical insulator for easy insertion of wires according to claim 2, characterized in that: The lead roller (26) has a plurality of evenly spaced arc grooves (27), which transversely penetrate the outer surface of the lead roller (26). The connecting surfaces between adjacent arc grooves (27) are all arc surfaces. The overall length of the lead roller (26) is less than the overall length of the rotating shaft (24).

4. An electrical insulator for easy insertion of wires according to claim 2, characterized in that: The lead roller (26) in the plurality of lead assemblies (2) is positioned beyond the inside of the thread hole (11), and its foremost end matches the mounting position of the fastening bushing (13).

5. An electrical insulator for easy insertion of wires according to claim 1, characterized in that: The inner diameter of the fastening bushing (13) is smaller than the overall inner diameter of the thread hole (11), the inner depth of the fastening bushing (13) is smaller than the inner depth of the thread hole (11), and the top side of both the fastening bushing (13) and the positioning ring (12) are arc surfaces.

6. An electrical insulator for easy insertion of wires according to claim 1, characterized in that: The insulating sleeve (3) is fitted on the inner wall of the socket (14), with both ends of the insulating sleeve (3) located outside the two ends of the socket (14), and both ends of the insulating sleeve (3) are arc-shaped.

7. A type of electrical wire, characterized in that: Includes the electrical insulator described in any one of claims 1-6.

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