Plug-and-play cable sheath

Abstract

The utility model relates to the technical field of cable sheaths, and particularly discloses a plug-and-play cable sheath, which comprises a first part, the first part comprises an insulating core wire, an insulating layer wrapping the insulating core wire and a secondary vulcanized rubber layer, the end face of the secondary vulcanized rubber layer is provided with an accommodating cavity, and a vulcanized reverse buckling rib is arranged in the accommodating cavity; the second part is connected with the first part, the second part comprises a primary vulcanization sheath body, a boss part arranged at one end of the primary vulcanization sheath body and a wiring terminal hole formed in the primary vulcanization sheath body, a vulcanization reverse buckling groove is formed in the surface of the boss part, the boss part extends into the containing cavity to enable the vulcanization reverse buckling groove to be buckled with the vulcanization reverse buckling rib, and the wiring terminal hole is formed in the primary vulcanization sheath body. The sheath is provided with a matched reverse buckling structure, the firmness of the two parts is better guaranteed, the tensile force is higher, the sealing effect is better, the product quality is improved, and meanwhile the electrical problems of cable short circuit, electric leakage, poor insulation and the like caused by core wire deformation, dislocation, flat movement and the like are reduced through the arrangement of the vulcanization layer.

Description

Technical Field

[0001] This application relates to the field of cable sheath technology, and in particular to a plug-in cable sheath. Background Technology

[0002] Cable sheaths are mainly installed at intersections of communication cables and power lines to protect the cables and prevent accidents such as open circuits and short circuits caused by external pressure, tension, or damage. Current cable protection pipes use oil-resistant, high-temperature resistant rubber sheaths that are tightly fitted to the sheath shell before being filled with epoxy resin and solidified. However, the epoxy resin layer is prone to deformation during the curing process, making quality control difficult. This can easily lead to core wire deformation, misalignment, and flattening, causing electrical problems such as short circuits, leakage, and poor insulation. The finished sheath has a low pass rate. Furthermore, the adhesion between the vulcanized components and the epoxy resin layer is not high, resulting in low tensile strength of the sheath. Utility Model Content

[0003] This application aims to provide a plug-in cable sheath to address the problems in related technologies, such as high difficulty in quality control of cable sheaths, low yield rate of finished sheaths, and poor adhesion between the finished vulcanized parts and the epoxy resin layer, resulting in low tensile strength of the sheath.

[0004] To achieve the above objectives, embodiments of this application provide a plug-in cable sheath, comprising:

[0005] The first part includes an insulated core wire, an insulating layer that wraps the insulated core wire, and a secondary vulcanized rubber layer that wraps part of the insulating layer. The end face of the secondary vulcanized rubber layer is provided with a receiving cavity, and a vulcanized backing rib is provided in the receiving cavity.

[0006] The second part is connected to the first part. The second part includes a primary vulcanized sheath body, a boss portion disposed at one end of the primary vulcanized sheath body, and a terminal hole opened in the primary vulcanized sheath body. The surface of the boss portion is provided with a vulcanized back-thread groove, and the boss portion extends into the receiving cavity so that the vulcanized back-thread groove engages with the vulcanized back-thread rib.

[0007] In some embodiments, the receiving cavity includes a first receiving cavity and a second receiving cavity arranged sequentially along the axis from the end face of the secondary vulcanized rubber layer, a stepped portion is formed at the junction of the first receiving cavity and the second receiving cavity, and the vulcanized back buckle is disposed on the side wall of the second receiving cavity.

[0008] In some embodiments, the first and second receiving cavities are cylindrical in shape, the vulcanized back buckle is disposed circumferentially on the side wall of the first receiving cavity, and the vulcanized back buckle faces the central axis of the first receiving cavity.

[0009] In some embodiments, the diameter of the cross-sectional circle of the first receiving cavity perpendicular to the axis is greater than the diameter of the cross-sectional circle of the second receiving cavity perpendicular to the axis.

[0010] In some embodiments, the second portion further includes a protrusion located between the primary vulcanized sheath body and the boss portion.

[0011] In some embodiments, the protrusion is an annular protrusion that protrudes in a direction away from the side surface of the primary vulcanized sheath body and abuts against the ladder portion.

[0012] In some embodiments, the terminal hole extends from one end face of the primary vulcanized sheath body away from the boss portion to the end face of the boss portion.

[0013] In some embodiments, the number of terminal holes is the same as the number of insulated core wires.

[0014] In some embodiments, the boss portion is provided with a creepage barrier away from the end face of the primary vulcanized sheath body, and the creepage barrier is configured to isolate adjacent terminal holes.

[0015] In some embodiments, the first portion further includes a metal outer shell layer, which is wrapped around the surface of the secondary vulcanized rubber layer.

[0016] Compared with the prior art, the technical solutions provided by the above embodiments of this application have at least the following beneficial effects:

[0017] The plug-in cable sheath provided in this application replaces the epoxy resin layer with a vulcanized rubber layer in the first part and a primary vulcanized sheath body in the second part. It is formed using a rubber vulcanization process, reducing core wire deformation, misalignment, and flattening that could cause electrical problems such as short circuits, leakage, and poor insulation. The vulcanization process uses mold forming, improving the coaxiality of the workpiece and the accuracy of dimensional and positional tolerances such as core wire position, thereby increasing the product qualification rate and product quality. Unlike epoxy resin, there is no flow issue during the vulcanization process; it is directly formed. Furthermore, by setting compatible interlocking structures in the first and second parts respectively, the self-fusion and adhesive properties of the rubber during vulcanization are utilized to interlock and bond the two rubber parts. The interlocking structure better ensures the firmness of the two parts, withstands stronger tensile forces, and provides a better sealing effect, thereby further improving product quality.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a plug-in cable sheath according to an embodiment of this application;

[0021] Figure 2 This is a structural schematic diagram of the first part of the embodiments of this application;

[0022] Figure 3 This is a structural schematic diagram of the second part according to an embodiment of this application;

[0023] Figure 4 This is a cross-sectional view of the second part of an embodiment of this application;

[0024] Figure 5 This is a front view of the cable sheath according to an embodiment of this application;

[0025] Figure 6 It is based on Figure 5 A sectional view.

[0026] Figure label:

[0027] 10. Cable sheath;

[0028] 100. First part; 110. Insulated core wire; 120. Insulation layer; 130. Secondary vulcanized rubber layer; 131. First receiving cavity; 1311. Ladder section; 132. Second receiving cavity; 1321. Vulcanized reverse buckle; 140. Metal outer shell layer;

[0029] 200, Second part; 210, Primary vulcanized sheath body; 211, First surface; 220, Protrusion; 230, Boss; 231, Vulcanized reverse groove; 232, Second surface; 240, Creepage barrier; 250, Terminal hole. Detailed Implementation

[0030] The embodiments of this application are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are merely for explaining this application and are not intended to limit this application.

[0031] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. "Multiple" means at least two, that is, two or more; "multiple" means at least two, that is, two or more.

[0032] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0035] In related technologies, a portion of the cable sheath is covered with an epoxy resin layer, which includes the core wire insulation layer. Another portion is a vulcanized component. During processing, an oil-resistant, high-temperature-resistant rubber sheath is tightly fitted to the sheath shell, followed by the pouring of epoxy resin and solidification. The inventors have discovered that due to the structural limitations of this cable sheath, its manufacturing process suffers from at least the following problems: 1) Numerous processing steps and long epoxy resin curing time result in a large footprint and the need for extensive storage shelves; 2) High accuracy and precision requirements are needed for the epoxy resin formulation; 3) The curing process is prone to deformation, leading to defects and making quality control difficult; the adhesion between the finished vulcanized component and the epoxy resin is not high, resulting in low tensile strength.

[0036] Based on this, the inventor proposes a cable sheath. By improving the cable sheath, the cable sheath not only reduces production requirements and improves product qualification rate and product quality, but also, by setting a reverse interlocking structure and bonding the two parts of the cable sheath, the connection is more secure, the tensile strength is stronger, and the sealing effect is better. The structure of the cable sheath will be further described below with reference to several embodiments.

[0037] Please see Figures 1 to 6 This embodiment provides a plug-in cable sheath 10, which includes a first part 100 and a second part 200. The first part 100 includes an insulated core wire 110, an insulation layer 120 covering the insulated core wire 110, and a secondary vulcanized rubber layer 130 covering part of the insulation layer 120. The end face of the secondary vulcanized rubber layer 130 is provided with a receiving cavity, and a vulcanized anti-locking rib 1321 is provided in the receiving cavity. The second part 200 is connected to the first part 100 and includes a primary vulcanized sheath body 210, a boss portion 230 provided at one end of the primary vulcanized sheath body 210, and a terminal hole 250 opened in the primary vulcanized sheath body 210. The surface of the boss portion 230 is provided with a vulcanized anti-locking groove 231, and the boss portion 230 extends into the receiving cavity so that the vulcanized anti-locking groove 231 and the vulcanized anti-locking rib 1321 are engaged.

[0038] In some embodiments, combined with Figure 2 The insulated core wire 110 can be set to three, or two or four, depending on the actual needs. The insulation layer 120 completely wraps the multiple insulated core wires 110. The secondary vulcanized rubber layer 130 wraps part of the insulation layer 120 to form a cylindrical shape. The receiving cavity includes a first receiving cavity 131 and a second receiving cavity 132 arranged sequentially along the axis from the end face of the secondary vulcanized rubber layer 130. A trapezoidal portion 1311 is formed at the junction of the first receiving cavity 131 and the second receiving cavity 132. The vulcanized back buckle 1321 is provided on the side wall of the second receiving cavity 132.

[0039] Thus, the platform section 1311 and the vulcanized back buckle 1321 increase the contact area at the connection between the first part 100 and the second part 200, making the rubber bond stronger, the tensile strength stronger, and the sealing effect better, thereby improving product quality. On the other hand, the vulcanized back buckle 1321 and the vulcanized back buckle groove 231 form a back buckle structure, which utilizes the self-fusion and adhesion properties of the rubber during vulcanization to buckle and bond the two rubber parts together. The back buckle structure better ensures the firmness of the two parts.

[0040] Optional, combined Figure 2 The first receiving cavity 131 and the second receiving cavity 132 are cylindrical in shape. The vulcanized anti-fastening rib 1321 is arranged circumferentially on the side wall of the first receiving cavity 131, and the vulcanized anti-fastening rib 1321 faces the central axis of the first receiving cavity 131. The diameter of the cross-sectional circle of the first receiving cavity 131 perpendicular to the axis is larger than the diameter of the cross-sectional circle of the second receiving cavity 132 perpendicular to the axis.

[0041] Optional, combined Figure 3 , Figure 4 and Figure 6One end of the insulated core wire 110 can extend to the first receiving cavity 131. A metal outer shell layer 140 is provided on the surface of the secondary vulcanized rubber layer 130 away from the insulation layer 120. The metal outer shell layer 140 completely covers the secondary vulcanized rubber layer 130. The material of the metal outer shell layer 140 is selected according to actual needs and is not limited here.

[0042] In some embodiments, combined with Figure 3 and Figure 6 The second part 200 also includes a protrusion 220, which is located between the primary vulcanized sheath body 210 and the boss part 230. The protrusion 220 is an annular protrusion that protrudes in the direction away from the side surface of the primary vulcanized sheath body 210. The protrusion 220 abuts against the ladder part 1311. The protrusion 220 and the ladder part 1311 are provided to better ensure the firmness of the connection between the first part 100 and the second part 200 by utilizing the self-fusion and adhesion properties of the rubber during vulcanization.

[0043] Please see Figure 4 For example, the primary vulcanized sheath body 210, the protrusion 220 and the boss 230 are integrally formed. The terminal hole 250 extends from the first surface 211 of the primary vulcanized sheath body 210 to the second surface 232 of the boss 230. At the same time, the number of terminal holes 250 is the same as the number of insulated core wires 110. The terminal holes 250 are flared near the first surface 211 of the primary vulcanized sheath body 210.

[0044] In some embodiments, combined with Figure 3 and Figure 4 The boss portion 230 is provided with a creepage barrier 240 away from the end face of the primary vulcanized sheath body 210. The creepage barrier 240 is constructed to isolate adjacent terminal holes 250. Specifically, the creepage barrier 240 completely isolates every two terminal holes 250. When the number of terminal holes 250 is three, the creepage barrier 240 can be herringbone shaped, that is, the three barriers intersect on the same central axis.

[0045] The plug-in cable sheath 10 of the above embodiment replaces the epoxy resin layer with a vulcanized rubber layer in the first part 100 and a primary vulcanized sheath body in the second part 200. It is formed using a rubber vulcanization process, reducing core wire deformation, misalignment, and flattening, which can cause electrical problems such as cable short circuits, leakage, and poor insulation. The vulcanization process uses mold forming, improving the coaxiality of the workpiece and the accuracy of dimensional and positional tolerances such as core wire position, thereby improving product qualification rate and product quality. The vulcanization process eliminates concerns about flow phenomena like epoxy resin, allowing for direct molding. Furthermore, by setting compatible interlocking structures in the first part 100 and the second part 200, the self-fusion and adhesive properties of the rubber during vulcanization are utilized to interlock and bond the two rubber parts. This interlocking structure better ensures the firmness of the two parts, withstands stronger tensile forces, and provides a better sealing effect, further improving product quality.

[0046] Especially in the production process of cable sheath 10, the epoxy resin layer is removed, thus eliminating the epoxy casting process. The casting vulcanization process is used for molding, saving time on epoxy resin casting and mixing, greatly reducing costs, and requiring virtually no space. After vulcanization, qualified products can be directly stored in dedicated frames or shelves for warehousing. Multiple cables can be processed at once, greatly reducing labor costs, increasing the pass rate, reducing scrap, saving raw materials, and lowering costs. The vulcanized parts are equipped with a reverse-clamping structure, which utilizes the self-fusion and adhesion properties of rubber during vulcanization to interlock and bond the two rubber parts. The reverse-clamping structure better ensures the firmness of the two parts.

[0047] Meanwhile, the secondary vulcanized rubber layer 130 and the primary vulcanized sheath body 210 do not need to worry about the epoxy flowing during the vulcanization process; they are directly molded and can be removed immediately. The reverse-locking structure makes the rubber bond stronger, withstands greater tensile force, and has a better sealing effect, thereby improving product quality and reducing costs. After vulcanization, a metal shell is inserted for further reinforcement.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0049] 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., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0050] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0051] Although embodiments of this application 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 this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A plug-in cable sheath, characterized in that, include: The first part includes an insulated core wire, an insulating layer that wraps the insulated core wire, and a secondary vulcanized rubber layer that wraps part of the insulating layer. The end face of the secondary vulcanized rubber layer is provided with a receiving cavity, and a vulcanized backing rib is provided in the receiving cavity. The second part is connected to the first part. The second part includes a primary vulcanized sheath body, a boss portion disposed at one end of the primary vulcanized sheath body, and a terminal hole opened in the primary vulcanized sheath body. The surface of the boss portion is provided with a vulcanized back-thread groove, and the boss portion extends into the receiving cavity so that the vulcanized back-thread groove engages with the vulcanized back-thread rib.

2. The plug-in cable sheath according to claim 1, characterized in that, The receiving cavity includes a first receiving cavity and a second receiving cavity arranged sequentially along the axis from the end face of the secondary vulcanized rubber layer. A stepped portion is formed at the junction of the first receiving cavity and the second receiving cavity, and the vulcanized back buckle is provided on the side wall of the second receiving cavity.

3. A plug-in cable sheath according to claim 2, characterized in that, The first and second receiving cavities are cylindrical in shape. The vulcanized back buckle is arranged circumferentially on the side wall of the first receiving cavity, and the vulcanized back buckle faces the central axis of the first receiving cavity.

4. A plug-in cable sheath according to claim 3, characterized in that, The diameter of the cross-sectional circle of the first receiving cavity perpendicular to the axis is greater than the diameter of the cross-sectional circle of the second receiving cavity perpendicular to the axis.

5. A plug-in cable sheath according to claim 2, characterized in that, The second part also includes a protrusion located between the primary vulcanized sheath body and the boss portion.

6. A plug-in cable sheath according to claim 5, characterized in that, The protrusion is an annular protrusion that protrudes in a direction away from the side surface of the primary vulcanized sheath body and abuts against the ladder portion.

7. A plug-in cable sheath according to claim 1, characterized in that, The terminal hole extends from one end face of the primary vulcanized sheath body away from the boss portion to the end face of the boss portion.

8. A plug-in cable sheath according to claim 7, characterized in that, The number of terminal holes is the same as the number of insulated core wires.

9. A plug-in cable sheath according to claim 1, characterized in that, The boss portion is provided with a creepage barrier away from the end face of the primary vulcanized sheath body, and the creepage barrier is configured to isolate the adjacent wiring terminal holes.

10. A plug-in cable sheath according to claim 1, characterized in that, The first part also includes a metal outer shell layer, which is wrapped around the surface of the secondary vulcanized rubber layer.

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