Composite pin-type insulator

Abstract

The utility model relates to needle type insulator technical field discloses a kind of composite needle type insulators, comprising: upper support, including the semicircular groove of top and the curve concave surface of both sides, for passing through and supporting cable, wherein, the curve concave surface surface is provided with self-locking tooth arc;Base structure, installation in the bottom of upper support, and the bottom of base structure is equipped with lower skirt structure;Clamp jaw structure, after cable passes through semicircular groove, clamp jaw structure is engaged with self-locking tooth arc by its elasticity, provides clamping pressure to cable.The utility model is provided with clamp jaw structure and self-locking tooth arc, when using, semicircular groove provides stable through path for cable, avoid slack or breakage due to unstable support, and the self-locking tooth arc of curve concave surface cooperates with clamp jaw structure, and self-locking effect is formed by mechanical engagement, prevent cable from falling off due to vibration or external force, significantly improve short-circuit resistance.

Description

Technical Field

[0001] This utility model relates to the field of pin insulator technology, and in particular to a composite pin insulator. Background Technology

[0002] With the continuous expansion of my country's power system and the increasingly extensive coverage of power transmission networks, higher requirements are being placed on the stability and safety of transmission lines. As an indispensable key component of transmission lines, insulators play a crucial role in isolating the electrical connection between conductors and grounding structures, supporting conductors, and bearing mechanical loads. In recent years, composite material insulators have gradually replaced traditional porcelain and glass insulators in power systems, becoming the mainstream application product due to their excellent insulation performance, high specific strength, and good resistance to pollution and corrosion. Among them, composite pin insulators, with their compact structure and easy installation, are widely used in overhead distribution and transmission lines.

[0003] Although composite pin insulators have made some technological progress in practical applications, as power grid construction extends to special application environments such as complex terrain and extreme climates, the existing composite pin insulator structure still has the following shortcomings in terms of cable support and fixing methods, ease of construction and installation, clamping structure stability, cable protection capabilities, and vibration and impact resistance:

[0004] First, from the perspective of cable support and fixation, existing composite pin insulators typically have cable channels or positioning recesses, but these are mostly horizontally installed or linearly designed, lacking spatial adaptability to terrain slopes. When cables need to be laid along non-horizontal paths (e.g., pulling cables from bottom to top in mountainous, hilly, or valley terrain), the cables are prone to skewing or bending when passing through the insulator channels, failing to naturally conform to the curved surface of the support recess. Forcibly binding and fixing the cable can easily lead to uneven local stress, excessive bending of the cable, and damage to the insulation layer or metal conductor, inducing potential faults such as breakdown and insulation degradation. Furthermore, fixing the cable in an unnatural posture can also cause local electric field distortion, exacerbating corona discharge and affecting the safe operation of the power system.

[0005] Secondly, regarding the robustness and reliability of cable fixing structures, existing composite pin insulators mostly use binding wires, straps, or clips to fix the cable to the support. These fixing methods rely on manual wrapping and overlapping, lacking an adjustable clamping mechanism, and are easily limited by the quality of the binding process, posing a risk of inconsistent clamping force and loosening. When transmission lines encounter external forces such as wind loads, vibrations, and lightning strikes during operation, the cables are prone to displacement and swaying. Long-term operation may also cause insulation wear or even detachment due to friction, affecting the safety and stability of the transmission line.

[0006] Furthermore, existing insulators are inadequate in protecting cables. Most fixing structures fail to evenly distribute pressure on the cable, easily leading to excessive localized stress and wear. Moreover, when the cable is subjected to vibration, sudden tension, or impact, the lack of effective buffering and vibration reduction measures can easily cause clamping force attenuation or component fatigue damage, affecting cable lifespan. In the installation and fixing of the insulators themselves, traditional fixing methods, such as pin fixing, are insufficient in resisting vibration and loosening under special conditions such as high wind speeds and earthquakes, making it difficult to ensure long-term stable fixing of the insulators on the pole beam.

[0007] Chinese patent CN222440264U discloses a spiral-type polymeric silicon needle insulator. While it improves the insulator structure to some extent, and the special design of through slots and through holes helps prevent cables from falling off, this solution does not consider the stress on the cable when laying it on inclined terrain, and may still cause damage to the cable.

[0008] Therefore, how to improve the overall performance and reliability of composite pin insulators in various application scenarios remains a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0009] The purpose of this invention is to solve the problems existing in the prior art by proposing a composite pin insulator.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A composite pin insulator, comprising:

[0012] The upper support includes a semi-circular groove at the top and curved concave surfaces on both sides for passing through and supporting the cable, wherein the surface of the curved concave surface is provided with a self-locking toothed arc.

[0013] The base structure is installed at the bottom of the upper support, and a lower skirt structure is installed at the bottom of the base structure;

[0014] The clamping structure provides constant clamping pressure to the cable after it passes through the semi-circular groove, thanks to its own elasticity and the engagement of the self-locking tooth arc.

[0015] Preferably, the gripper structure is C-shaped, and its inner walls on both sides are provided with self-locking tooth grooves that are adapted to the self-locking tooth arc.

[0016] Preferably, force-applying blocks are installed on both sides of the gripper structure, and the force-applying blocks are integrally formed with the gripper structure.

[0017] Preferably, the concave curved surface includes a first curved surface extending from the upper end of the upper support side to the lower end, and a second curved surface extending outward from the side end of the first curved surface toward the upper support.

[0018] Preferably, the second curved surface has a positioning hole, and an elastic telescopic member is installed on one side of the force-applying block, and the elastic telescopic rod is adapted to the positioning hole.

[0019] Preferably, the telescopic end of the elastic telescopic rod is provided with a frustum transition portion, which serves as a guide when the telescopic end of the elastic telescopic member is inserted into the positioning hole.

[0020] Preferably, the elastic telescopic rod includes an outer tube, a spring installed inside the outer tube, and an inner rod that movably passes through one end of the outer tube. The inner rod is fixedly connected to the other end of the spring, and the frustum transition portion is located on the side of the inner rod away from the spring.

[0021] Preferably, a pressing member is provided above the inner periphery of the gripper structure. The pressing member includes an arc-shaped middle part and J-shaped ends connected to both ends of the arc-shaped middle part. The other end of the J-shaped end is integrally formed with the inner sidewall of the gripper structure.

[0022] Preferably, a semi-circular buffer portion is provided at the top of the arc-shaped middle part, and the top of the semi-circular buffer portion moves against the inner wall of the top of the gripper structure.

[0023] Preferably, the lower skirt structure has a threaded hole inside, a threaded rod is helically connected inside the threaded hole, and a nut is helically connected to the side of the threaded rod away from the lower skirt structure.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] This utility model, through its designed gripper structure and self-locking toothed arc, provides a stable path for the cable to pass through during use. The semi-circular groove prevents the cable from loosening or breaking due to unstable support. The self-locking toothed arc with curved concave surface works in conjunction with the gripper structure to form a self-locking effect through mechanical interlocking, creating a uniform clamping force on the cable. This prevents the cable from falling off due to vibration or external force, as well as from being damaged due to uneven force, and significantly improves its short-circuit resistance. Attached Figure Description

[0026] Figure 1 This is a front sectional view of a composite pin insulator proposed in this utility model;

[0027] Figure 2 This is a top view of the upper support of a composite pin insulator proposed in this utility model;

[0028] Figure 3 A three-dimensional schematic diagram of an elastic telescopic rod for a composite needle insulator proposed in this utility model;

[0029] Figure 4 This is a schematic cross-sectional view of the elastic telescopic rod of a composite pin insulator proposed in this utility model.

[0030] In the diagram: 1. Upper support; 2. Semi-circular groove; 3. Protrusion; 4. Self-locking toothed arc; 5. Base structure; 6. Lower skirt structure; 7. Clamping claw structure; 8. Cable; 9. Curved concave surface; 10. Force-applying block; 11. First curved surface; 12. Second curved surface; 13. Positioning hole; 14. Elastic telescopic rod; 15. Outer tube; 16. Inner rod; 17. Spring; 18. Frustum transition part; 19. Pressed part; 20. Arc-shaped middle part; 21. J-shaped end; 22. Semi-circular buffer part; 23. Threaded hole; 24. Threaded rod; 25. Nut; 26. Opening; 27. Push block. Detailed Implementation

[0031] To make the technical means and objectives and effects of this utility model easier to understand, the embodiments of this utility model will be described in detail below with reference to specific figures.

[0032] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connection arrangements between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] Reference Figure 1-4 A composite pin insulator, comprising:

[0036] The upper support 1 includes a semi-circular groove 2 at the top and curved concave surfaces 9 on both sides for passing through and supporting the cable 8. The semi-circular groove 2 forms upward protrusions 3 on both sides, which can further restrict the position of the cable 8. The surface of the curved concave surface 9 is provided with a self-locking tooth arc 4.

[0037] The base structure 5 is installed at the bottom of the upper support 1, and the bottom of the base structure 5 is equipped with a lower skirt structure 6.

[0038] After the cable 8 passes through the semi-circular groove 2, the clamping structure 7 provides continuous clamping pressure to the cable 8 by engaging with the self-locking tooth arc 4 through its own elasticity.

[0039] In use, this device, through the clamping claw structure 7 and the self-locking tooth arc 4, provides a stable path for the cable 8 to pass through the semi-circular groove 2, preventing loosening or breakage due to unstable support. The self-locking tooth arc 4 of the curved concave surface 9 cooperates with the clamping claw structure 7 to form a self-locking effect through mechanical interlocking, preventing the cable 8 from falling off due to vibration or external force, significantly improving short-circuit withstand capability. Furthermore, since the clamping claw structure 7 and the insulator itself are separately set, there is no need to make too many structural designs on the insulator itself, which can effectively reduce the processing cost of the insulator of this application. In the example of this application, the upper support 1, the base structure 5, and the clamping claw structure 7 are made of high-density polyethylene.

[0040] As a preferred example of this application, the gripper structure 7 is C-shaped, and its inner walls on both sides are provided with self-locking tooth grooves 26 that are adapted to the self-locking tooth arc 4. The gripper structure 7 can quickly fix the cable 8 by engaging with the self-locking tooth arc 4 through its own elastic deformation, without the need for additional tools or binding rings, simplifying the construction process. The engagement of the tooth grooves and the self-locking tooth arc 4 forms a mechanical lock, which is more secure than traditional binding rings and is especially suitable for areas with high environmental corrosion. The C-shaped design of the gripper structure 7 can provide uniform radial clamping force, avoiding cable 8 wear or gripper deformation caused by unilateral force.

[0041] As a preferred example of this application, force-applying blocks 10 are installed on both sides of the gripper structure 7. The force-applying blocks 10 are disc-shaped and integrally formed with the gripper structure 7. The integral forming of the force-applying blocks 10 and the gripper structure 7 avoids welding or assembly defects and ensures uniform stress transmission when force is applied. The integrally formed force-applying blocks 10 provide a fulcrum for gripping or tool operation. When the user pushes the force-applying blocks 10, downward pressure can be applied to the gripper structure 7, reducing the force deviation during manual installation and improving construction efficiency.

[0042] As a preferred example of this application, the curved concave surface 9 includes a first curved surface 11 extending from the upper end of the side of the upper support 1 to the lower end, and a second curved surface 12 extending from the side of the first curved surface 11 toward the outside of the upper support 1. The second curved surface 12 is provided with a positioning hole 13. An elastic telescopic member is installed on one side of the force-applying block 10. The elastic telescopic rod 14 is adapted to the positioning hole 13. The telescopic end of the elastic telescopic rod 14 is provided with a frustum transition portion 18, which plays a guiding role when the telescopic end of the elastic telescopic rod 14 is inserted into the positioning hole 13. The elastic telescopic rod 14 includes an outer tube 15, a spring 17 installed inside the outer tube 15, and an inner rod 16 that movably passes through one end of the outer tube 15. The inner rod 16 is fixedly connected to the other end of the spring 17. The frustum transition portion 18 is provided on the side of the inner rod 16 away from the spring 17.

[0043] The curved surface design can reduce the adhesion of pollutants such as dust and salt, reduce the risk of corona discharge and insulation aging, and is suitable for highly polluted environments;

[0044] The matching design of the positioning hole 13 and the elastic telescopic rod 14 ensures that the gripper structure 7 is quickly aligned with the curved concave surface 9 of the upper support 1 during installation, avoiding clamping failure caused by manual alignment deviation. The pre-tightening force of the elastic telescopic component can compensate for component processing errors, improve assembly consistency, and ensure the stability of mass production.

[0045] The sloping design of the frustum transition section 18 provides automatic centering guidance for the insertion of the flexible telescopic component into the positioning hole 13, enabling quick installation even in confined spaces or scenarios with limited visibility, thus reducing operation time.

[0046] In order to facilitate the disassembly and assembly of the gripper structure 7 during the later maintenance of the insulator, as a preferred example of this application, an opening 26 is provided on the outer side of the outer tube 15, and the opening 26 extends to one end of the outer tube 15 near the frustum transition portion 18. A push block 27 is installed on the outer side of the inner rod 16 at a position corresponding to the opening 26. The push block 27 can push the inner rod 16 to move inside the outer tube 15, so as to facilitate the separation of the inner rod 16 from the positioning hole 13.

[0047] As a preferred example of this application, a pressing member 19 is provided above the inner periphery of the gripper structure 7. The pressing member 19 includes an arc-shaped middle part 20 and J-shaped ends 21 connected to both ends of the arc-shaped middle part 20. The other end of the J-shaped end 21 is integrally formed with the inner sidewall of the gripper structure 7. The upper end of the J-shape extends from the inner sidewall of the gripper to the top of the cable 8, forming a hook-shaped structure, which, together with the self-locking tooth groove 26, further locks the cable 8 to prevent it from coming off upward.

[0048] The arc-shaped middle part 20 fits the top curved surface of the cable 8, evenly distributing pressure and avoiding damage to the cable 8 caused by local compression. The arc-shaped structure can absorb the vibration energy of the cable 8, reducing the attenuation of clamping force or component fatigue caused by dynamic load.

[0049] As a preferred example of this application, a semi-circular buffer portion 22 is provided at the top of the arc-shaped middle portion 20. The top of the semi-circular buffer portion 22 moves against the inner wall of the top of the gripper structure 7. The semi-circular buffer portion 22 moves against the inner wall of the top of the gripper, providing buffer space when the cable 8 is subjected to sudden tension or impact, preventing the pressing member 19 from being damaged by rigid collision.

[0050] As a preferred example of this application, the lower skirt structure 6 is provided with a threaded hole 23 inside, and a threaded rod 24 is helically connected inside the threaded hole 23. A nut 25 is helically connected to the side of the threaded rod 24 away from the lower skirt structure 6. The combination of the threaded hole 23 and the threaded rod 24 allows the insulator to be finely adjusted on the pole beam to adapt to different installation spacing requirements. The locking mechanism of the nut 25 provides anti-vibration loosening capability, which is more reliable than traditional pin fixing, and is especially suitable for areas with high wind speeds or frequent earthquakes.

[0051] Compared to existing technologies, this application, through its clamping structure 7 and self-locking toothed arc 4, provides a stable path for the cable 8 through the semi-circular groove 2, preventing loosening or breakage due to unstable support. The self-locking toothed arc 4 on the curved concave surface 9, in conjunction with the clamping structure 7, forms a self-locking effect through mechanical engagement, preventing the cable 8 from falling off due to vibration or external force, significantly improving short-circuit withstand capability. The clamping structure 7, through its own elastic deformation, engages with the self-locking toothed arc 4, quickly securing the cable 8 without the need for additional tools or binding rings, simplifying the process. In this process, the meshing of the toothed groove and the self-locking toothed arc 4 forms a mechanical lock, which is more secure than traditional binding rings, especially suitable for areas with high environmental corrosion. The C-shaped design of the gripper structure 7 provides uniform radial clamping force, avoiding cable 8 wear or gripper deformation caused by unilateral force. By setting the force-applying block 10 to be integrally formed with the gripper structure 7, welding or assembly defects can be avoided, ensuring uniform stress transmission during force application. The integrally formed force-applying block 10 provides a fulcrum for gripping or tool operation. The user can push the force-applying block 10 to apply force. The gripper structure 7 applies downward pressure, reducing force deviation during manual installation and improving construction efficiency. The matching design of the positioning hole 13 and the elastic telescopic rod 14 ensures that the gripper structure 7 quickly aligns with the curved concave surface 9 of the upper support 1 during installation, avoiding clamping failure caused by manual alignment deviation. The pre-tightening force of the elastic telescopic component can compensate for component processing errors, improve assembly consistency, and ensure the stability of mass production. The inclined design of the frustum transition part 18 provides automatic centering guidance for the insertion of the elastic telescopic component into the positioning hole 13, enabling quick installation even in confined spaces or scenarios with limited visibility, reducing operation time. The arc-shaped middle part 20 of the pressing part 19 fits against the top curved surface of the cable 8, evenly distributing pressure and avoiding damage to the cable 8 caused by local compression. The arc-shaped structure can absorb the vibration energy of the cable 8, reducing clamping force attenuation or component fatigue caused by dynamic loads. The semi-circular buffer part 22 at the top of the arc-shaped middle part 20 provides buffer space when the cable 8 is subjected to sudden tension or impact, preventing the pressing part 19 from being damaged by rigid collision.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite pin-type insulator, characterized in that: include: The upper support (1) includes a semi-circular groove (2) at the top and curved concave surfaces (9) on both sides for passing through and supporting the cable (8), wherein the surface of the curved concave surface (9) is provided with a self-locking toothed arc (4). The base structure (5) is installed at the bottom of the upper support (1), and the bottom of the base structure (5) is equipped with a lower skirt structure (6). After the cable (8) passes through the semi-circular groove (2), the clamping structure (7) engages with the self-locking tooth arc (4) through its own elasticity, providing clamping pressure to the cable (8).

2. A composite pin insulator according to claim 1, characterized in that: The gripper structure (7) is C-shaped, and its inner walls on both sides are provided with self-locking tooth grooves (26) that are adapted to the self-locking tooth arc (4).

3. A composite pin insulator according to claim 2, characterized in that: Both sides of the gripper structure (7) are equipped with force-applying blocks (10), and the force-applying blocks (10) are integrally formed with the gripper structure (7).

4. A composite pin insulator according to claim 3, characterized in that: The concave surface (9) includes a first curved surface (11) extending from the upper end of the side of the upper support (1) to the lower end, and a second curved surface (12) extending from the side of the first curved surface (11) toward the outside of the upper support (1).

5. A composite pin insulator according to claim 4, characterized in that: The second curved surface (12) has a positioning hole (13), and an elastic telescopic member is installed on one side of the force-applying block (10). The elastic telescopic rod (14) is adapted to the positioning hole (13).

6. A composite pin insulator according to claim 5, characterized in that: The telescopic end of the elastic telescopic rod (14) is provided with a frustum transition part (18), which plays a guiding role when the telescopic end of the elastic telescopic member is inserted into the positioning hole (13).

7. A composite pin insulator according to claim 6, characterized in that: The elastic telescopic rod (14) includes an outer tube (15), a spring (17) installed inside the outer tube (15), and an inner rod (16) that moves through one end of the outer tube (15). The inner rod (16) is fixedly connected to the other end of the spring (17), and the frustum transition part (18) is located on the side of the inner rod (16) away from the spring (17).

8. A composite pin insulator according to claim 7, characterized in that: A pressing member (19) is provided above the inner periphery of the gripper structure (7). The pressing member (19) includes an arc-shaped middle part (20) and J-shaped ends (21) connected to both ends of the arc-shaped middle part (20). The other end of the J-shaped ends (21) is integrally formed with the inner sidewall of the gripper structure (7).

9. A composite pin insulator according to claim 8, characterized in that: The top of the arc-shaped middle part (20) is provided with a semi-circular buffer part (22), and the top of the semi-circular buffer part (22) moves against the top inner wall of the gripper structure (7).

10. A composite pin insulator according to claim 9, characterized in that: The lower skirt structure (6) has a threaded hole (23) inside, and a threaded rod (24) is spirally connected inside the threaded hole (23). A nut (25) is spirally connected to the side of the threaded rod (24) away from the lower skirt structure (6).

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