Cover and cap integrated prefabricated terminal

Abstract

The utility model belongs to the technical field of cable accessories, and particularly relates to a cover cap integrated prefabricated terminal, which comprises a terminal main body, a cover cap structure is arranged at the top end of the terminal main body, the cover cap structure and the terminal main body are integrally formed, the terminal main body is cylindrical, the cover cap structure is a tubular body positioned at the top end of the terminal main body, the tubular body and the terminal main body are coaxially arranged, and the diameter of the tubular body is smaller than that of the terminal main body; the top end of the terminal body is directly connected with the cold shrink sealing tube, and the tail end of the terminal body is directly connected with the insulating tube. According to the integrated prefabricated terminal, the cover cap and the terminal body are integrally formed, the production cost is reduced, the cover cap does not need to be additionally installed, the installation steps are simplified, the situation that the cover cap is not installed in place can be avoided, and the reliability and safety of the product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable accessories, and particularly relates to a prefabricated terminal with an integrated cover cap. Background Art

[0002] The cold shrinkable prefabricated terminal is a common cable accessory. It is a component formed by injecting and vulcanizing an elastomer material (such as silicone rubber or ethylene propylene rubber) in a factory, and then expanding the diameter and lining with a plastic spiral support. When installing this terminal, only need to put the pre-expanded sleeve on the processed cable end or joint, pull out the internal supporting plastic spiral strip, and press it tightly on the cable insulation. The cold shrinkable prefabricated terminal series products have excellent high elasticity, anti-aging, anti-corrosion, anti-tracking, and anti-ultraviolet performance. At the same time, their hydrophobicity, explosion-proof performance, and electrical performance are also very superior.

[0003] Currently, during the actual installation process of some cold shrinkable prefabricated terminal products, after installing the terminal body, a cover cap still needs to be installed. The cover cap is used to cover the end of the terminal body to provide insulation, sealing, and protection functions. When the applicant analyzed the failure statistics and failure causes of conventional medium and low voltage cold shrinkable prefabricated terminals in previous work, it was found that the more common failure was that there was a gap at the step between the conductor and the insulation layer of the cold shrinkable prefabricated terminal, which then caused discharge. After analysis, the reason for this failure was that the terminal body and the cover cap were not installed in place or there was an offset between the two. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a prefabricated terminal with an integrated cover cap, in which the terminal body and the cover cap are integrally formed, reducing the production cost of the whole product. At the same time, the installation process is also reduced, not only improving the installation efficiency, but also making the reliability of the prefabricated terminal higher.

[0005] The technical solution of the utility model is: a prefabricated terminal with an integrated cover cap, including a terminal body, a cover cap structure is arranged at the top end of the terminal body, and the cover cap structure is integrally formed with the terminal body. The terminal body is cylindrical, and the cover cap structure is a tubular body located at the top end of the terminal body. The tubular body is coaxially arranged with the terminal body, and the diameter of the tubular body is smaller than the diameter of the terminal body; the top end of the terminal body is directly connected to a cold shrinkable sealing tube, and the tail end of the terminal body is directly connected to an insulating tube.

[0006] Further, a pressing part for pressing the insulating tape is arranged on the inner wall of the tubular body.

[0007] Furthermore, the compression part on the inner wall of the tubular body is a protrusion structure. The protrusion structure can be an annular protrusion, and there are multiple annular protrusions, and the annular protrusions are all arranged coaxially with the tubular body; the protrusion structure can also be a point-shaped protrusion, and the point-shaped protrusions are arranged randomly on the inner wall of the tubular body. The protrusion structure can also be a linear protrusion, such as a threaded structure, that is, an internal thread arranged on the inner wall of the tubular body.

[0008] Furthermore, a fastening ring is provided on the outer wall of the tubular body, and the fastening ring on the outer wall of the tubular body is used to increase the connection strength between the tubular body and the cold shrink sealing tube to achieve a tight connection.

[0009] Furthermore, the tubular body is in a frustum shape, and the diameter of one end of the tubular body away from the terminal body is slightly smaller than the diameter of the other end. At the same time, the thickness of the one end of the tubular body away from the terminal body is also thinner than the other end, so as to facilitate the expansion of the tubular body at the opening. Preferably, a plurality of axial gaps are evenly arranged on the outer end opening, and the axial gaps facilitate the expansion of the outer end opening of the tubular body.

[0010] Furthermore, a plurality of insulating sheds are arranged on the outer circumference of the terminal body, and the outer diameter of each insulating shed remains the same.

[0011] Furthermore, a stress insert is provided at the rear end of the terminal body, and the stress insert is integrally formed with the terminal body, that is, the stress insert is enclosed inside the terminal body.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the integrated prefabricated terminal in the present application integrates the cover cap and the terminal body into one piece, which reduces the production cost, and does not need to install the cover cap separately, simplifies the installation steps, and can avoid the situation where the cover cap is not installed properly. The cover cap structure in the present application is a tubular body, and a clamping part is provided on the inner wall of the tubular body, which can better adhere to the insulating tape through the clamping part, and is not easy to loosen, thereby improving the reliability and safety of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0014] Figure 2 It is a three-dimensional schematic diagram of the terminal body in the embodiment of the utility model;

[0015] Figure 3 is a schematic cross-sectional view of a terminal body in an embodiment of the utility model;

[0016] Figure 4 It is a partial enlarged schematic diagram of the cap structure in the embodiment of the utility model;

[0017] In the figure: 1 - terminal body, 11 - cap structure, 111 - pressing part, 112 - fastening ring, 12 - stress insert, 13 - insulating petticoat, 2 - cold-shrinkable sealing tube, 3 - insulating tube, 4 - terminal, 5 - PVC adhesive tape, 6 - insulating tape, 7 - grounding copper braid. Detailed implementation manners

[0018] The following will further elaborate on the present utility model in conjunction with specific embodiments. The methods or functional components not specifically described in the embodiments are all prior arts; unless otherwise defined, all technical terms and scientific terms used herein have the same meanings as those generally understood by those skilled in the technical field of the present technology.

[0019] Embodiment

[0020] As Figures 1-3 shown, it is a prefabricated terminal with an integrated cap, including a terminal body 1, a cold-shrinkable sealing tube 2, an insulating tube 3, a terminal 4, and a grounding copper braid 7; a cap structure 11 is provided at the top end of the terminal body 1, and the cap structure 11 is integrally formed with the terminal body 1. The terminal body 1 is cylindrical. The cap structure 11 is a tubular body located at the top end of the terminal body 1. The tubular body is coaxially arranged with the terminal body 1, and the diameter of the tubular body is smaller than that of the terminal body 1. The top end of the terminal body 1 is connected to the terminal 4 and the cold-shrinkable sealing tube 2, and the tail end of the terminal body 1 is connected to the insulating tube 3 and the grounding copper braid 7. PVC adhesive tapes 5 or insulating tapes 6 are provided at the connection between the tail end of the terminal body 1 and the insulating tube 3 and at the connection between the insulating tube 3 and the grounding copper braid 7.

[0021] In this embodiment, the pressing part 111 on the inner wall of the tubular body is a convex structure. The convex structure is an annular protrusion, and there are multiple annular protrusions, and all the annular protrusions are coaxially arranged with the tubular body. In other embodiments, the convex structure can also be a dot-like protrusion, and the dot-like protrusions are disorderly arranged on the inner wall of the tubular body. The convex structure can also be a threaded structure, that is, an internal thread provided on the inner wall of the tubular body.

[0022] In this embodiment, a fastening ring 112 is provided on the outer wall of the tubular body. The fastening ring 112 on the outer wall of the tubular body is used to increase the connection strength between the tubular body and the cold-shrinkable sealing tube 2 and achieve their tight connection.

[0023] In this embodiment, a plurality of insulating petticoats 13 are provided on the outer periphery of the terminal body 1, and the outer diameter of each insulating petticoat 13 is the same. A stress insert 12 is provided at the tail end of the terminal body 1, and the stress insert 12 is integrally formed with the terminal body 1.

[0024] The installation method of the integrated hood prefabricated terminal in the present utility model is the same as that of the existing prefabricated terminal. The difference is that there is no need to install an additional hood, so the specific installation process will not be elaborated herein.

[0025] In some other embodiments, such as Figure 4 shown, the tubular body is frustum-shaped, and the diameter of the end of the tubular body away from the terminal body is slightly smaller than that of the other end. At the same time, the thickness of the end of the tubular body away from the terminal body is also thinner than that of the other end, so as to facilitate the expansion of the opening at the end of the tubular body away from the terminal body.

[0026] The above are only some embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have combinations and variations of the foregoing various technical features. Without departing from the spirit and scope of the present utility model, improvements, variations, equivalent substitutions of the present utility model, or the use of the structure or method of the present utility model in other fields to achieve the same effect all fall within the protection scope of the present utility model.

Claims

1. A prefabricated terminal with integrated cover cap, characterized in that: It includes a terminal body, a cover cap structure is arranged at the top of the terminal body, and the cover cap structure is integrally formed with the terminal body, the terminal body is cylindrical, the cover cap structure is a tubular body at the top of the terminal body, the tubular body is coaxially arranged with the terminal body, and the diameter of the tubular body is smaller than the diameter of the terminal body; the top of the terminal body is connected to a cold shrink sealing tube, and the tail end of the terminal body is connected to an insulating tube.

2. The cap-integrated prefabricated terminal according to claim 1, characterized in that: A pressing portion for pressing the insulating tape is arranged on the inner wall of the tubular body.

3. The cap-integrated prefabricated terminal according to claim 2, characterized in that: The pressing portion on the inner wall of the tubular body is a convex structure.

4. The cap-integrated prefabricated terminal according to claim 3, characterized in that: The protrusion structure is an annular protrusion, and there are multiple annular protrusions, which are all coaxially arranged with the tubular body.

5. The cap-integrated prefabricated terminal according to claim 3, characterized in that: The protrusion structure is a dot-shaped protrusion, and the dot-shaped protrusion is randomly arranged on the inner wall of the tubular body.

6. The cap-integrated prefabricated terminal according to claim 3, characterized in that: The protruding structure is a thread, that is, the inner wall of the tubular body is provided with an internal thread.

7. The cap-integrated prefabricated terminal according to claim 1, characterized in that: A fastening ring is arranged on the outer wall of the tubular body.

8. The cap-integrated prefabricated terminal according to claim 1, characterized in that: The tubular body is in a frustum shape, and the diameter of one end of the tubular body away from the terminal body is smaller than the diameter of the other end, and the thickness is also thinner.

9. The cap-integrated prefabricated terminal according to claim 1, characterized in that: A plurality of insulating sheds are arranged on the outer periphery of the terminal body, and the outer diameter of each insulating shed remains the same.

10. The cap-integrated prefabricated terminal according to claim 1, characterized in that: A stress insert is arranged at the tail end of the terminal body, and the stress insert is integrally formed with the terminal body.

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