A combined cable joint

Abstract

This utility model relates to a combined cable intermediate joint, comprising a connecting tube, with clamping heads at both ends of the connecting tube. Each clamping head has a through hole along its central axis, which communicates with the inner cavity of the connecting tube. Multiple movable claws are rotatably connected to the clamping heads, forming a clamping space. A driving component is provided on the clamping heads, allowing the clamping space to expand or shrink according to the size of the cable under the action of the driving component. This combined cable intermediate joint, by setting rotatable movable claws and using the driving component to drive the movable claws to rotate and retract, can clamp and secure cables of different sizes. Furthermore, the simultaneous clamping of the cable by multiple movable claws provides more even force on the cable compared to traditional bolt-fastened joints, preventing damage to the internal conductors of the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable connection technology, and specifically to a combined cable intermediate joint. Background Technology

[0002] With the continuous expansion of power grid construction and the sustained growth of power transmission demand, cable joints are key components used to connect two cable sections, ensuring the continuity of the cable line and maintaining stable electrical performance. The performance of their connection structure directly affects the reliability and safety of power grid operation.

[0003] Currently, traditional cable joints typically employ fixed structures or single-size clamping designs. However, the actual cable sizes used in different engineering scenarios vary considerably, especially in cable transition areas where two cables of different diameters need to be connected. Traditional joints, such as bolt-fastened joints, use a metal shell (e.g., aluminum alloy or cast iron) with bolt plates, requiring manual tightening of the bolts to apply pressure and secure the cable. However, the fixed plate spacing only accommodates cables of specific diameters, making it difficult to adapt to different cable sizes and resulting in poor versatility, failing to meet diverse cable connection needs. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a combined cable joint to solve the problem that traditional cable joints are difficult to adapt to cables of different specifications and sizes.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model provides a combined cable intermediate joint, including a connecting tube, with clamping heads respectively provided at both ends of the connecting tube. Each clamping head has a through hole along its central axis, and the through hole communicates with the inner cavity of the connecting tube. Multiple movable claws are rotatably connected to the clamping head, and the multiple claws together form a clamping space. A driving component is provided on the clamping head, and the clamping space can be expanded or reduced according to the size of the cable under the action of the driving component.

[0007] Furthermore, the clamping head includes an outer frame and a rotating disk. The lower side of the outer frame is fixedly connected to one end face of the connecting tube, and the rotating disk is rotatably disposed inside the outer frame. The movable claws are rotatably connected to the upper side of the outer frame and the upper side of the rotating disk, respectively.

[0008] Furthermore, a sliding groove is provided on the outer frame, and the driving component includes a lever and an elastic reset component. The lever is slidably engaged in the sliding groove and fixedly connected to the outer peripheral wall of the rotating disk.

[0009] Furthermore, the elastic reset assembly includes a tension spring, one end of which is connected to the rotating disk and the other end of which is connected to the outer frame.

[0010] Furthermore, the drive assembly also includes a locking structure for fixing the rotating disk. The locking structure includes a screw hole provided on the outer frame and a screw adapted to the screw hole. The rotating disk has a positioning hole corresponding to the locking hole. The screw can pass through the positioning hole and be screwed into the screw hole to fix the rotating disk.

[0011] Furthermore, the inner wall of the movable claw is provided with anti-slip protrusions to enhance the clamping stability of the cable.

[0012] Furthermore, the lower ends of the two clamping heads are fixed with threaded cylinders, and both ends of the connecting rod are provided with external threads, and both ends of the connecting rod are screwed into the threaded cylinders.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. Improved connection stability: This combined cable intermediate joint is equipped with rotatable movable claws. The movable claws are driven by the drive component to rotate and retract, which can clamp and fix cables of different specifications and sizes. Moreover, multiple movable claws clamp the cable at the same time. Compared with traditional bolt-fastened joints, the cable is subjected to balanced force and will not damage the internal conductors of the cable.

[0015] 2. Convenient and Efficient Operation: The coordinated design of the lever and slide in the drive assembly allows operators to easily rotate the rotating disk by simply moving the lever, opening and closing the movable jaws without the need for complex tools. This reduces operational difficulty and improves the efficiency of cable connection and disconnection. Simultaneously, the locking structure quickly secures the rotating disk, ensuring stable clamping of the movable jaws and further enhancing operational convenience.

[0016] 3. Compact and space-saving structure: The connecting pipe and clamping head adopt a combined structure. The clamping head adopts a combined structure of outer frame and rotating disk, which makes reasonable use of space and makes the entire cable intermediate joint structure compact. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a combined cable intermediate joint according to the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the clamping head, movable claw, and drive assembly in this utility model;

[0019] Figure 3 This is a cross-sectional view of the present invention.

[0020] In the diagram: 1. Connecting pipe; 11. External thread; 2. Clamping head; 21. Outer frame; 22. Rotating disk; 221. Screw; 222. Positioning hole; 23. Threaded cylinder; 24. Through hole; 3. Movable claw; 31. Anti-slip protrusion; 4. Drive assembly; 41. Lever; 411. Slide groove; 42. Tension spring. Detailed Implementation

[0021] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0022] In the description of this application, the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Please see Figure 1-3 This utility model provides a technical solution: a combined cable intermediate joint, including a connecting pipe 1, which is a hollow cylinder open at both ends, used to connect the cores of two cable segments. Clamping heads 2 are fixedly connected to both ends of the connecting pipe 1, and threaded cylinders 23 are fixedly provided at the lower ends of the clamping heads 2. Both ends of the connecting pipe 1 are provided with external threads 11, and both ends of the connecting pipe 1 are screwed into the threaded cylinders 23. This combined design of the intermediate joint allows the clamping heads 2 at both ends to be disassembled and the connecting pipe 1 replaced after long-term use and wear, thus saving production costs.

[0024] Please see Figure 2 , Figure 3 The clamping head 2 consists of an outer frame 21 and a rotating disk 22. Both the outer frame 21 and the rotating disk 22 have through holes 24 along their central axes. The two through holes 24 overlap and communicate with the inner cavity of the connecting pipe 1. The outer frame 21 has an annular structure, and its lower side is firmly fixed to the end face of the connecting pipe 1 by welding or bolting. A sliding groove 411 is provided on the outer frame 21, extending along its circumference. The rotating disk 22 is rotatably mounted inside the outer frame 21. A bearing is provided between the rotating disk 22 and the outer frame 21 to reduce friction during rotation and ensure flexible rotation of the rotating disk 22.

[0025] Please refer to Figure 2The clamping head 2 is rotatably connected to three movable claws 3 arranged in a circular array. The central angles of the three movable claws 3 are 120 degrees apart. One end of each movable claw 3 is rotatably connected to the upper side of the outer frame 21 via a pivot, and the other end is rotatably connected to the upper side of the rotating disk 22 via a pivot. The inner sidewall of the movable claw 3 is machined with fine anti-slip protrusions 311 to increase the friction with the outer surface of the cable.

[0026] like Figure 3 As shown, the clamping head 2 is provided with a driving assembly 4 for driving the movable jaw 3 to rotate. The driving assembly 4 includes a lever 41, an elastic reset assembly, and a locking structure. The lever 41 is a long, rod-shaped structure, which slides within the groove 411 and is fixedly connected to the outer peripheral wall of the rotating disk 22.

[0027] The elastic reset assembly uses a tension spring 42. A horizontal bar protrudes outward from the outer peripheral wall of the rotating disk 22, and a vertical bar is fixed to the bottom wall of the outer frame 21. One end of the tension spring 42 is fixedly connected to the horizontal bar of the rotating disk 22, and the other end is fixedly connected to the vertical bar of the outer frame 21. The locking structure includes a screw hole on the outer frame 21 and a screw adapted to the screw hole. A positioning hole 222 corresponding to the screw hole is provided on the rotating disk 22, and the two can be accurately aligned when the rotating disk 22 is in a specific position.

[0028] In the initial state, the tension spring 42 is in a stretched state, and one end of the three movable claws 3 converges at the center of the through hole 24, abutting against each other.

[0029] By moving the lever 41, one end of the lever 41 is fixedly connected to the rotating disk 22, while the other end slides within the groove 411. Moving the lever 41 causes the rotating disk 22 to rotate within the outer frame 21. As the rotating disk 22 rotates, the movable claws 3, which are rotatably connected to both the rotating disk 22 and the outer frame 21, rotate around their respective axes. The movable claws 3 gradually open outwards. At this point, the cores of the two cables to be connected are inserted into the inner cavities at both ends of the connecting tube 1, ensuring tight contact between the cores and the connecting tube 1 and guaranteeing good conductivity. Specifically, mechanical pressure can be applied to the connecting tube using a special mold to plastically deform the tube and tightly wrap the cores, thus preventing loose connections.

[0030] During this process, the tension spring 42 will stretch and deform as the rotating disk 22 rotates, storing elastic potential energy. When the lever 41 is released, under the elastic potential energy of the tension spring 42, the lever 41 quickly returns to its original position, and the rotating disk 22 rotates in the opposite direction. At this time, the movable claws 3, which are rotatably connected to both the rotating disk 22 and the outer frame 21, will rotate around their respective axes, gradually closing towards the center until they tightly clamp the outer surface of the cable. After the movable claws 3 have firmly clamped the cable, the screw 221 is inserted into the positioning hole 222 of the rotating disk 22 and screwed into the screw hole of the outer frame 21, thereby fixing the position of the rotating disk 22, preventing the movable claws 3 from loosening during use, and ensuring the stability of the cable connection.

[0031] The inner wall of connecting pipe 1 is also coated with an insulating layer, such as an epoxy resin insulating coating, with a thickness of approximately 0.5 mm, to prevent leakage between cable cores. The insulating coating on the inner wall of connecting pipe 1 effectively isolates the cable cores, prevents leakage, improves the insulation performance of the cable joint, and ensures electrical safety.

[0032] Meanwhile, the cable intermediate joint is also equipped with a protective cover (not shown). The protective cover is made of insulating plastic and is detachably fitted onto the outside of the connecting tube 1 and the clamping head 2 by means of snap-fit ​​or threaded connection. The detachable protective cover can provide waterproof, dustproof and mechanical damage protection for the cable intermediate joint, making it adaptable to a variety of complex working environments and extending the service life of the cable intermediate joint.

[0033] In addition, waterproof components such as sealing rings and sealing sleeves can be installed inside the pipe as needed, but waterproof components are not the focus of this application and will not be described in detail here.

[0034] When it is necessary to disassemble the cable intermediate joint, first unscrew the screw 221 to release the lock on the rotating disk 22. Move the lever 41; under the elastic potential energy of the tension spring 42, the rotating disk 22 will rotate, causing the movable claw 3 to open outwards and release the clamp on the cable. Finally, pull both cable sections out of the connecting pipe 1 and remove the protective cover to complete the disassembly of the cable intermediate joint.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A combined cable intermediate joint characterised in that: Includes a connecting pipe (1), with clamping heads (2) respectively provided at both ends of the connecting pipe (1), and the clamping heads (2) having through holes (24) along the central axis, the through holes (24) being connected to the inner cavity of the connecting pipe (1); The clamping head (2) is rotatably connected to multiple movable claws (3), and the multiple movable claws (3) together form a clamping space; The clamping head (2) is provided with a driving component (4), and the clamping space can be expanded or reduced according to the size of the cable under the action of the driving component (4).

2. A combined cable intermediate joint according to claim 1, characterised in that: The clamping head (2) includes an outer frame (21) and a rotating disk (22). The lower side of the outer frame (21) is fixedly connected to one end face of the connecting pipe (1), and the rotating disk (22) is rotatably disposed inside the outer frame (21). The movable claws (3) are rotatably connected to the upper side of the outer frame (21) and the upper side of the rotating disk (22), respectively.

3. A combined cable intermediate joint according to claim 2, characterised in that: The outer frame (21) is provided with a sliding groove (411). The drive assembly (4) includes a lever (41) and an elastic reset assembly. The lever (41) is slidably fitted in the sliding groove (411) and fixedly connected to the outer peripheral wall of the rotating disk (22).

4. A combined cable intermediate joint according to claim 3, characterised in that: The elastic reset assembly includes a tension spring (42), one end of which is connected to the rotating disk (22) and the other end is connected to the outer frame (21).

5. A combined cable intermediate joint according to claim 3, characterised in that: The drive assembly (4) also includes a locking structure for fixing the rotating disk (22), the locking structure including a screw hole provided on the outer frame (21) and a screw (221) adapted to the screw hole. The rotating disk (22) has a positioning hole (222) corresponding to the screw hole, and the screw (221) can pass through the positioning hole (222) and be screwed into the screw hole.

6. A combined cable intermediate joint according to claim 1, characterised in that: The inner wall of the movable claw (3) is provided with anti-slip protrusions (31) to enhance the clamping stability of the cable.

7. A combined cable intermediate joint according to claim 1, characterized in that: The lower ends of the two clamping heads (2) are fixed with threaded cylinders (23), and both ends of the connecting pipe are provided with external threads (11), and both ends of the connecting pipe are screwed into the threaded cylinders (23).

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