A tapered composite jacketed outdoor terminal

Abstract

The present application relates to the technical field of cable termination, in particular to a conical composite sleeve type outdoor terminal, comprising a conical composite sleeve, an electric stress control tube, a sleeve ring seat, a rotating sleeve seat and a plurality of pressing plates, the sleeve ring seat is installed on the inner side of the electric connection ring, the rotating sleeve seat is arranged inside the sleeve ring seat and is engaged with the worm, and the pressing plates are driven to deflect through the guiding cooperation of the slide pin and the limiting sliding hole. The sliding strip, sliding sleeve ear and sliding finger are arranged between the adjacent pressing plates to form linkage, so that the inner holes of the pressing plate combination realize synchronous contraction, and the cable end is quickly clamped and stably positioned. The conical composite sleeve is made of weather-resistant material and has good insulation performance and outdoor protection ability. The plurality of pressing plates are conductive structures and are provided with rough contact surfaces, can form a multi-point uniform conductive path, improve the high current connection ability, and enhance the heat dissipation performance through the split structure. The present application realizes the quick disassembly, reliable conduction and efficient heat dissipation of the cable joint, and is suitable for various outdoor cable terminal scenes.

Description

Technical Field

[0001] This invention relates to the field of cable termination technology, specifically a tapered composite sleeve type outdoor terminal. Background Technology

[0002] With the large-scale application of medium and high voltage cables in power systems, outdoor cable terminals, as crucial nodes connecting lines and equipment, directly impact overall operational safety through their installation reliability, contact resistance control capabilities, and heat dissipation performance. Currently, most outdoor cable terminals employ crimp terminals, bolt-type clamps, or integral sleeve-type connection structures, connecting the cable conductor to external equipment via fixing hardware. While these structures achieve basic conductivity, they generally suffer from low installation and disassembly efficiency, high reliance on manual labor, and long maintenance cycles. Especially in outdoor high-altitude or confined environments, replacing cable joints is often cumbersome, failing to meet the needs of rapid maintenance.

[0003] Existing high-current termination structures generally rely on single-point crimping or bolt terminals to form conductive channels. The contact interface is mostly a fixed, clamped design, and its contact area is limited by the structure, making it difficult to achieve multi-point uniform bonding within the entire area covering the cable end face. As a result, the actual current carrying capacity at the termination is easily affected by factors such as poor local contact and oxidation of the contact surface, leading to excessive temperature rise, fluctuations in electrical performance, or insufficient long-term operational stability.

[0004] Regarding heat dissipation at cable terminations, traditional integral crimped terminals or sleeve-type terminals are typically single-piece solid structures. Their heat dissipation path is mainly unidirectional conduction, and their heat dissipation efficiency is limited due to material and geometry constraints. When subjected to high currents, localized heat accumulation easily occurs in the termination area, leading to uneven temperature rise and difficulty in dissipating hot spots, thus affecting connection lifespan. Furthermore, existing structures mostly use an integral crimping method, which cannot adaptively cover the cable termination according to its shape, lacking multiple heat dissipation surfaces and natural ventilation paths, further limiting improvements in heat dissipation performance.

[0005] In summary, existing outdoor cable terminals have significant shortcomings in terms of rapid installation and disassembly efficiency, high current connection capacity, and heat dissipation performance, making it difficult to simultaneously meet the comprehensive requirements of rapid maintenance, reliable power supply, and high-power heat dissipation. Therefore, it is necessary to provide a cable terminal structure with adjustable structure, distributable contact surfaces, and split-type heat dissipation capability to overcome the limitations of existing technologies. Summary of the Invention

[0006] This invention aims to address the structural deficiencies of existing outdoor cable terminals in terms of rapid assembly / disassembly, high-current connection, and heat dissipation. This invention provides a conical composite sleeve-type outdoor terminal, which, by constructing a multi-plate pressure plate structure with linkage deflection and a worm gear transmission adjustment mechanism, achieves rapid clamping of cable joints, uniform conductivity, and efficient heat dissipation, thereby improving the safety and maintenance efficiency of outdoor terminal operation.

[0007] This invention discloses a conical composite sleeve-type outdoor terminal, comprising a conical composite outer sleeve, an electrical stress control tube, a collar seat, a rotating sleeve seat, and several pressure plates. By engaging the worm gear with the worm ring of the rotating sleeve seat, the rotating sleeve seat is driven to rotate inside the collar seat. Then, through the guiding relationship formed by the sliding pin and the limiting sliding hole, the pressure plates undergo deflection and retraction movements under the action of the linkage structure, thereby achieving adjustable clamping and reliable conductive connection of the cable end.

[0008] To achieve controllable clamping, this invention proposes a structural system comprising a conical composite outer sleeve, an electrical stress control tube, a collar seat, a rotating sleeve seat, and several pressure plates. The collar seat and the connecting ring form an installation base. The rotating sleeve seat is located inside the collar seat and meshes with a worm gear, with a sliding pin penetrating a limiting sliding hole to form a deflection guide. The pressure plates achieve synchronous clamping through connecting rods, sliding pins, and sliding strips, sliding lugs, and sliding fingers between adjacent pressure plates. This enables rapid clamping, stable positioning, and multi-plate uniform force distribution of the cable end, improving the adaptability and maintenance efficiency of outdoor terminals.

[0009] The tapered composite jacket is made of weather-resistant silicone rubber or epoxy composite material, with an overall tapered and tapered structure and multiple layers of umbrella skirts on the outer wall. This enhances the creepage distance along the surface, improves outdoor pollution resistance, and achieves stable insulation protection in harsh environments.

[0010] In a preferred embodiment, the electrical stress control tube is further configured as follows: it is made of a high-dielectric-constant metal material, with its tip penetrating a tapered composite jacket and integrally formed with a junction ring. This improves the electric field distribution at the cable termination, achieving stress reduction and contributing to enhanced high-voltage insulation stability at the terminal.

[0011] In a preferred example, the worm is further configured such that the worm is rotatably sleeved on the inner side of the lug, its thread engages with the worm gear ring on the surface of the swivel housing, and can be driven by an internal hexagon socket head cap.

[0012] Specifically, the controlled rotation of the rotating sleeve allows for precise manual adjustment of the deflection and retraction of the pressure plate, improving operational convenience and structural controllability.

[0013] In a preferred embodiment, the pressure plate surface is further configured such that a groove is formed to limit the movement of the sliding fingers. During clamping, the sliding fingers on adjacent pressure plate surfaces slide along the groove, achieving synchronous guidance between the pressure plates.

[0014] Specifically, ensure that the deflection trajectories of the pressure plates are consistent to avoid eccentric force, so that the central clamping hole diameter shrinks evenly and improves clamping stability.

[0015] In a preferred example, the number of pressure plates is set to six or eight, arranged at equal angles along the circumference. Adjacent pressure plates form a composite sliding guide relationship through sliders, sliding lugs, sliding fingers, and sliding grooves, with the sliders having an arc-shaped structure.

[0016] Specifically, it achieves circumferentially distributed clamping of multiple pieces, resulting in uniform clamping force, a smooth inner hole shrinkage trajectory, and improved end-connection effect and structural stability.

[0017] In a preferred embodiment, the sliding lug is further configured such that it has a C-shaped structure and is fixed to one end of the slide bar. The sliding lug engages slidably with the sliding fingers of the adjacent pressure plate to drive the adjacent pressure plates to move synchronously.

[0018] Specifically, the linkage consistency of the pressure plates is enhanced to form a multi-plate synchronous deflection overall clamping mechanism, thereby improving clamping accuracy and response speed.

[0019] In a preferred embodiment, the pressure plate, the rotating sleeve seat, and the collar seat are all made of conductive metal, and the outer surface of the pressure plate is frosted.

[0020] Specifically, it reduces contact resistance, improves high current transmission capacity, and utilizes rough surfaces to enhance friction, thereby improving cable end fixing and conductivity stability.

[0021] The beneficial effects achieved by this invention are as follows: 1. In this invention, by constructing a linkage clamping mechanism consisting of a collar seat, a rotating sleeve seat, and a multi-plate pressure plate, the clamping and releasing process of the cable end can be controlled by a worm gear drive to form an adjustable central clamping hole diameter, thus realizing the rapid disassembly and assembly of the cable joint, significantly improving the convenience and efficiency of outdoor terminals in the installation, maintenance, and replacement process.

[0022] 2. In this invention, the pressure plate made of conductive metal material and the rotating sleeve form a stable multi-point conductive path. The surface of the pressure plate is provided with a frosted rough surface to enhance the contact strength with the outer layer of the cable conductor. This allows multiple pressure plates to form a large-area, multi-contact contact interface when they are folded up, thereby ensuring the reliable establishment of a high-current channel and improving the current carrying capacity and electrical performance stability of the termination part.

[0023] 3. In this invention, a split clamping structure consisting of several pressure plates is adopted. The pressure plates are synchronously attached and maintain segmented heat dissipation areas through sliding strips, sliding lugs and sliding fingers. The structural gaps can form natural heat dissipation channels in the clamped state, so that the heat conduction path of the contact interface can be dispersed, which significantly improves the heat dissipation capacity of the cable joint under high current conditions and improves the thermal stability and long-term operational reliability of the overall termination system. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 This is a schematic diagram of the collar seat and rotating sleeve seat structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the surface structure of the rotating sleeve according to an embodiment of the present invention; Figure 4 This is an exploded structural diagram of the rotating sleeve and pressure plate according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the pressure plate engagement state according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the surface structure of adjacent pressure plate assembly according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the pressure plate surface structure according to an embodiment of the present invention.

[0025] Figure label: 1. Conical composite jacket; 11. Electrical stress control tube; 12. Electrical contact ring; 2. Collar seat; 21. Collar cap; 22. Cover ring; 23. Shaft lug; 24. Worm gear; 3. Rotary sleeve base; 31. Worm gear ring; 32. Limiting sliding hole; 4. Pressure plate; 41. Connecting rod; 42. Shaft pin; 43. Sliding pin; 44. Sliding strip; 45. Sliding lug; 46. Sliding finger. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0027] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0028] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a conical composite sleeve-type outdoor terminal.

[0029] Combination Figures 1-7As shown, the present invention provides a conical composite sleeve type outdoor terminal, including a conical composite outer sleeve 1, an electrical stress control tube 11, a collar seat 2, a rotating sleeve seat 3, and several pressure plates 4.

[0030] The top end of the electrical stress control tube 11 is integrally provided with an electrical contact ring 12, and the collar seat 2 is fixedly sleeved on the inner side of the electrical contact ring 12 to form the mounting base for the rotation and clamping mechanism.

[0031] The collar seat 2 is composed of a collar cap 21, a cover ring 22, and a worm gear 24. The outer surface of the cover ring 22 is provided with a lug 23, and the worm gear 24 is rotatably sleeved on the inner side of the lug 23; the collar cap 21 and the cover ring 22 together form an integral structure, and a gap is reserved on its inner side for sleeve seat 3.

[0032] The outer circumference of the rotating sleeve 3 is provided with a worm gear ring 31, the surface of which is provided with several limiting sliding holes 32 distributed along the arc direction. A connecting rod 41 is rotatably mounted on one side of the pressure plate 4. The end of the connecting rod 41 is fixed to the inner side of the ring cap 21 and the cover ring 22 respectively by a shaft pin 42, realizing the deflection fulcrum of the pressure plate 4. The other end of the pressure plate 4 is provided with a sliding pin 43, which passes through the limiting sliding hole 32 and is fixed to the inner side of the collar seat 2, so that the pressure plate 4 is guided by the limiting sliding hole 32 when the rotating sleeve 3 rotates, thereby realizing the deflection movement.

[0033] A sliding strip 44 is provided on one side of the pressure plate 4, and a sliding lug 45 and a sliding finger 46 are provided on one end of the pressure plate 4. Adjacent pressure plates 4 are linked by the sliding engagement between the sliding strip 44, the sliding lug 45 and the sliding finger 46, so that each pressure plate 4 is synchronously closed or opened under the drive of the rotating sleeve seat 3, thereby realizing the dynamic adjustment of the central clamping hole diameter for clamping and fixing the surface of the cable joint.

[0034] In this embodiment, the conical composite jacket 1 is integrally molded using a weather-resistant silicone rubber or epoxy resin composite structure, and has a tapered contour along the axial direction. Its outer wall is covered with multi-level umbrella skirts to improve the surface creepage distance, enhance outdoor flashover resistance, and improve the stable insulation performance of the terminal in humid, dusty, and salt spray environments.

[0035] In this embodiment, the electrical stress control tube 11 is made of a high dielectric constant metal or composite conductor, with its top end penetrating the conical composite jacket 1 and integrally formed with the junction ring 12. This structure ensures that a uniform electric field distribution is formed on the inner side of the cable conductor, achieving stress reduction and guaranteeing a stable electrical connection to the external end.

[0036] In this embodiment, the worm 24 is supported by the lug 23 and can be manually rotated. Its outer thread meshes with the worm gear ring 31 on the outer periphery of the rotating sleeve 3. The operator can manually rotate the worm 24 to drive the rotating sleeve 3 to rotate stably inside the collar seat 2, thereby driving the pressure plate 4. One end of the worm 24 can be equipped with an internal hexagon socket to accommodate various operating tools.

[0037] In this embodiment, the surface of the pressure plate 4 is provided with a groove for guiding the sliding finger 46. When adjacent pressure plates 4 are deflected under the drive of the rotating sleeve seat 3, the sliding finger 46 slides along the groove, thereby maintaining a stable linkage between adjacent pressure plates 4, ensuring uniform and synchronous contraction of the central aperture. The pressure plates 4 are synchronously attached and maintain segmented heat dissipation areas through the sliding strip 44, the sliding sleeve lug 45 and the sliding finger 46. The structural gaps can form a natural heat dissipation channel in the clamped state, which disperses the heat conduction path of the contact interface and significantly improves the heat dissipation capacity of the cable joint under high current conditions.

[0038] In this embodiment, the number of pressure plates 4 is set to six or eight, arranged symmetrically at equal angles. Adjacent pressure plates 4 are connected by a composite sliding pair formed by a slide bar 44, a sliding lug 45, a sliding finger 46, and a groove on the surface of the pressure plate 4, causing the central inner hole formed by their combination to uniformly converge along the circumferential direction. The slide bar 44 is arc-shaped, which allows the pressure plates 4 to maintain a better fit trajectory and enhance the circumferential convergence effect when deflected.

[0039] In this embodiment, the sliding lug 45 has a C-shaped structure and is fixed to one end of the slide bar 44. When the rotating sleeve base 3 rotates and drives the sliding finger 46 to move, the sliding lug 45 generates a controllable linkage constraint on the adjacent pressure plates 4, so that all pressure plates 4 move synchronously towards the center, achieving a stable clamping action.

[0040] In this embodiment, the pressure plate 4, the rotating sleeve seat 3, and the collar seat 2 are all made of conductive metal, enabling an effective electrical connection between the clamping mechanism and the electrical termination structure. Furthermore, the side of the pressure plate 4 facing the cable end is designed with a frosted texture, which increases the coefficient of friction during clamping, improves the stability of the clamping contact, and enhances the fixing effect and electrical reliability of the cable end.

[0041] Working principle and usage process of this invention: The conical composite sleeve outdoor terminal of the present invention uses a worm gear 24 located on the outside of the collar seat 2 as a manual drive mechanism to achieve controlled rotation of the rotating sleeve seat 3. In use, the operator manually rotates the worm gear 24, which meshes with the worm tooth ring 31 on the outer periphery of the rotating sleeve seat 3, so that the rotating sleeve seat 3 rotates smoothly around the central axis on the inner side of the collar seat 2.

[0042] During the rotation of the rotating sleeve 3, the pressure plate 4 assembly achieves controlled linkage. Specifically, the end of the connecting rod 41 is fixedly installed on the inner side of the collar seat 2 through the shaft pin 42, forming the rotation fulcrum of the pressure plate 4 relative to the collar seat 2; the sliding pin 43 is fixed on the inner side of the rotating sleeve 3 and passes through the limiting sliding hole 32, so that the pressure plate 4 is guided and constrained by a predetermined trajectory when the rotating sleeve 3 rotates, generating deflection motion.

[0043] Several pressure plates 4 are connected by sliding strips 44, sliding lugs 45, and sliding fingers 46 to form a mutually meshing guide sliding pair. As the rotating sleeve base 3 continues to rotate, each pressure plate 4 gradually approaches the center under the common constraint of the guide structure, causing the diameter of the multi-piece clamping inner hole formed by their combination to decrease synchronously. Ultimately, this results in uniform clamping and fastening of the outer surface of the cable joint, enabling reliable positioning of the cable joint and stabilization of electrical connection pressure.

[0044] In terms of operation, the operator first inserts the cable end into the central cavity formed by the combination of pressure plates 4; then, the operator manually rotates the worm gear 24, driving the rotating sleeve 3 to move in conjunction with the pressure plates 4, gradually tightening the inner hole until the required clamping force is achieved; the frosted textured surface of the pressure plate 4 further increases the friction with the cable's outer sheath, ensuring a secure clamping. To release the cable, simply rotate the worm gear 24 in the opposite direction, causing the rotating sleeve 3 to move in the opposite direction, and the pressure plates 4 to move outward synchronously under the guidance of the adjacent pressure plates 4, restoring the central hole diameter to its original size, thus completing the release operation.

[0045] Through the above structure and operation process, the present invention achieves the technical effect of adaptive clamping, adjustment and fixation of cable ends without the need for external tools, and the clamping force is uniform, stable and reliable, ensuring the mechanical stability and electrical safety of outdoor terminals during long-term operation.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which 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.

[0047] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A conical composite sleeve-type outdoor terminal, characterized in that, include: Conical composite jacket (1), electrical stress control tube (11), collar seat (2), rotating sleeve seat (3) and several pressure plates (4); The top end of the electrical stress control tube (11) is provided with a contact ring (12), and the collar seat (2) is fixedly sleeved on the inner side of the contact ring (12); The collar seat (2) includes a ring cap (21), a cover ring (22) and a worm (24). The surface of the cover ring (22) is provided with a shaft lug (23), and the worm (24) is rotatably sleeved on the inner side of the shaft lug (23). The ring cap (21) is fixedly connected to the surface of the cover ring (22), and its inner side is provided with a gap for sleeved on the rotating seat (3). A connecting rod (41) is rotatably mounted on one side of the pressure plate (4), and a shaft pin (42) and a sliding pin (43) are rotatably mounted on the ends of the pressure plate (4) and the connecting rod (41), respectively. The two ends of the shaft pin (42) are fixed to the inner sides of the ring cap (21) and the cover ring (22), respectively. The surface of the rotating sleeve (3) is provided with a worm gear ring (31), and the surface of the rotating sleeve (3) is provided with an arc-shaped limiting sliding hole (32). The sliding pin (43) is slidably sleeved on the inner side of the limiting sliding hole (32), and both ends of the sliding pin (43) pass through the limiting sliding hole (32) and are fixed to the inner side of the collar seat (2); a sliding strip (44) is provided on one side of the pressure plate (4), and a sliding lug (45) and a sliding finger (46) are provided on one end of the pressure plate (4), and the sliding lug (45) on the adjacent surface of the pressure plate (4) is slidably sleeved on the surface of the sliding strip (44) of another pressure plate (4).

2. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The number of pressure plates (4) is six or eight. Adjacent pressure plates (4) are guided to slide against each other through the sliding lugs (45), the sliding fingers (46), the sliding strips (44), and the sliding grooves on the surface of the pressure plates (4). The sliding strips (44) have an arc-shaped structure.

3. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The sliding lug (45) has a C-shaped structure and is fixed to one end of the slide bar (44) to guide the mutual sliding between adjacent pressure plates (4).

4. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The worm (24) meshes with the surface of the worm gear ring (31) for transmission, and one end of the worm (24) is fixedly connected to an internal hexagon socket.

5. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The conical composite jacket (1) is a weather-resistant silicone rubber / epoxy composite material component, with an overall conical tapered structure and an umbrella skirt arranged on the outer wall.

6. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The electrical stress control tube (11) is a high dielectric constant metal tube structure, and the top end of the electrical stress control tube (11) penetrates the conical composite jacket (1) and is integrally formed with the electrical contact ring (12).

7. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The pressure plate (4) has a sliding groove on its surface, and the sliding fingers (46) on the adjacent pressure plate (4) are slidably sleeved on the inner side of the sliding groove to guide the mutual sliding between adjacent pressure plates (4).

8. The conical composite sleeve outdoor terminal according to claim 1, characterized in that: The pressure plate (4), the rotating sleeve seat (3) and the collar seat (2) are all conductive metal components, and one side surface of the pressure plate (4) is frosted rough.

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