A cable intermediate hot-melt joint

Abstract

The present application relates to the technical field of cable connection, and discloses a cable intermediate hot-melt joint, comprising a plurality of sleeve joints distributed along the circumference of the cable, wherein the plurality of sleeve joints comprise an outer sleeve, an inner sleeve and two flexible filling bodies, wherein the inner sleeve is arranged on the inner side of the outer sleeve, and the flexible filling bodies are arranged on both sides of the inner sleeve on the outer sleeve, and a connecting belt is arranged between two adjacent sleeve joints; the present application uses sleeve joints, winding belts and connecting belts in coordination, wraps the outer sleeve and the inner sleeve at the cable connection, fills the gap with the flexible filling body, and realizes rapid filling of polyethylene, and then tightens the winding section and wraps it twice to complete preliminary fixation, and completes fixation with the subsequent heat-resistant pressure sleeve, and can then perform hot-melt treatment without having to wrap it all the time, thereby improving work efficiency and reducing labor intensity, and has the effects of high work efficiency and low labor intensity.

Description

Technical Field

[0001] The present application relates to the technical field of cable connection, and in particular to a cable intermediate hot-melt joint. Background Art

[0002] The hot melt joint in the middle of the cable refers to a joint that uses hot melt technology to connect two sections of cable together when connecting two sections of cable in the middle of the cable. The hot melt joint is used by wrapping the thermoplastic polyethylene film around the cable connection after the two cable cores are welded and wrapped with semiconductor tape, and wrapped around the outside of the stress cone of the insulator of the two cables close to each other, with a wrapping thickness of 4mm protruding from the insulation outside the cable core, and then hot-melting to shape the two ends of the thermoplastic polyethylene after hot-melting shaping to be stress cones, and then squeeze them together to make them tightly combined.

[0003] With respect to the above-mentioned related technologies, the inventor believes that the thermoplastic polyethylene film is wound around the connection part of the two cables, and the thermoplastic polyethylene film needs to be wound to a certain thickness, and the winding time is long, which affects the efficiency of the cable hot-melt connection;

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] In order to solve the problem that the conventional method of wrapping a thermoplastic polyethylene film around the connection position of two cables takes a long time, the present application provides a cable middle hot-melt joint.

[0006] The present application provides a cable intermediate hot-melt joint adopting the following technical solution:

[0007] A cable intermediate hot-melt joint comprises a plurality of sleeve joints distributed along the circumference of the cable, wherein each of the sleeve joints comprises an outer sleeve, an inner sleeve and two flexible filling bodies, wherein the inner sleeve is arranged on the inner side of the outer sleeve and is used to be sleeved on the outer side of a semiconductor winding layer at a cable connection, and the flexible filling bodies are arranged on both sides of the inner sleeve on the outer sleeve and are used to fill the gap between the outer sleeve, the inner sleeve and the cable insulator.

[0008] Preferably, a connecting belt is provided between two adjacent sleeve joints for connecting two adjacent outer sleeves to facilitate the sleeve connection.

[0009] Preferably, a plurality of winding belts are provided on one of the outer sleeves, and the winding belt includes a fixing section fixedly provided on the outer sleeve, and a winding section is provided at the end of the fixing section for preliminarily winding and fixing the outer sleeve.

[0010] Preferably, the outer sleeve comprises an outer sleeve, and both ends of the outer sleeve are provided with external stress cones for optimizing the electric field distribution at the end of the cable insulation and protecting the cable insulation from mechanical stress.

[0011] Preferably, the inner sleeve comprises an inner sleeve arranged in the outer sleeve, and inner conical grooves are arranged on both sides of the inner sleeve for fitting and docking with the stress cone at the end of the cable insulator.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] Through the coordinated use of sleeve joints, winding belts and connecting belts, by wrapping the outer sleeve and inner sleeve around the cable connection, and using a flexible filling body to fill the gap, rapid filling of polyethylene can be achieved, and then the winding section is tightened and wrapped twice to complete the initial fixation, and the subsequent heat-resistant pressure sleeve is used to complete the fixation, and hot-melt treatment can be performed without the need to wrap it all the time, thereby improving work efficiency and reducing labor intensity. Compared with the existing technology, it has the effects of high work efficiency, simple operation and low labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of a three-dimensional structure from a first-view perspective of an embodiment of the application;

[0015] Figure 2 is a schematic diagram of a second perspective stereoscopic structure of an embodiment of the application;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure from a third perspective of an embodiment of the application.

[0017] Explanation of the reference numerals: 1. sleeve joint; 101. outer sleeve; 1011. outer sleeve; 1012. outer stress cone; 102. inner sleeve; 1021. inner sleeve; 1022. inner cone groove; 103. flexible filling body; 2. winding belt; 201. fixed section; 202. winding section; 3. connecting belt. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-3 This application is described in further detail.

[0019] The present application embodiment discloses a cable intermediate hot-melt joint. Figure 1-3 A cable intermediate hot-melt joint comprises a plurality of sleeve joints 1, two adjacent sleeve joints 1 are connected with connecting tapes 3, adjacent sleeve joints 1 are connected by connecting tapes 3, and the sleeve joints 1 are conveniently sleeved on the welding position of two cable cores wrapped with semiconductor tapes, a plurality of wrapping tapes 2 are installed on one of the sleeve joints 1, and the plurality of sleeve joints 1 are wrapped to fix the cable connection position, so as to facilitate the preliminary operation of subsequent hot-melt treatment.

[0020] Reference Figure 2 The sleeve joint 1 includes an outer sleeve 101, which is sleeved on the cable insulation layer through the outer sleeve 101, an inner sleeve 102 is installed on the inner side of the outer sleeve 101, which is sleeved on the semiconductor tape winding layer of the cable through the inner sleeve 102, and flexible filling bodies 103 are installed on both sides of the outer sleeve 101 and the inner sleeve 102, and the gap between the cable insulation layer and the outer sleeve 101 is filled by the flexible filling body 103.

[0021] Reference Figure 3 The outer casing 101 includes an outer casing 1011, and both ends of the outer casing 1011 are installed with external stress cones 1012. The end of the outer casing 1011 is sleeved on the cable insulation layer through the external stress cone 1012. The external stress cone 1012 can optimize the electric field distribution at the end of the cable insulation and protect the cable insulation from mechanical stress. At the same time, it is convenient to fix the subsequent semiconductor tape and the two ends of the metal shielding net to avoid displacement. The connecting belt 3 is fixed to the outer casing 1011 by heat bonding.

[0022] Reference Figure 3 The inner sleeve 102 includes an inner sleeve 1021 installed on the inner side of the outer sleeve 1011. Both ends of the inner sleeve 1021 are provided with inner conical grooves 1022, which can be connected with the stress cone on the cable insulation layer through the inner conical grooves 1022 to increase the smoothness of the connection and ensure a seamless transition between the outer sleeve 1011 and the insulation layer.

[0023] Reference Figure 3 The flexible filling body 103 can be selected according to needs, such as a flexible sheet installed along the circumferential direction, a flexible strip distributed along the axial direction, etc. The sleeve joint 1 is made by an integrated molding technology.

[0024] Reference Figure 1 The wrapping belt 2 includes a fixed section 201 installed on the outer sleeve 1011, and a flexible wrapping section 202 is installed at the end of the fixed section 201. The fixed section 201 is fixed to the outer sleeve 1011 by heat bonding. The sleeve joint 1, the wrapping belt 2 and the connecting belt 3 are all made of hot-melt polyethylene material.

[0025] The implementation principle of a cable intermediate hot-melt joint in an embodiment of the present application is as follows: the inner sleeve 102 is sleeved on the semiconductor tape winding layer at the welding point of two cable cores, and the inner cone groove 1022 is aligned with the stress cone of the cable insulator, and then the outer sleeve 101 is closed and pressed, and then the winding section 202 is tightened and wound twice around the sleeve joint 1 formed by the outer sleeve 101 to prevent the sleeve joint 1 from loosening, and then the insulating sleeve wrapped by the sleeve joint 1 is squeezed and shaped through a heat-resistant pressure tube, 1-2 layers of aluminum foil are wrapped around the heat-resistant pressure tube, and the aluminum foil is tightened on the heat-resistant pressure tube with a PI film to obtain a shaping mold; the shaping mold is heated to evenly heat the outer side of the shaping mold until the sleeve joint 1 and the semiconductor tape winding layer in the shaping mold are hot-fused into one to form an insulator attached to the cable, and then the surface of the insulator is polished to form a smooth hot-melt insulator joint, and then the semiconductor coating is sprayed on the hot-melt insulator joint, and the semiconductor tape is wrapped, and finally the metal shielding net and the protective layer are covered.

[0026] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0027] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cable intermediate hot-melt joint, comprising a plurality of sleeve joints (1) distributed along the circumference of the cable, characterized in that: Several sleeve joints (1) each comprise an outer sleeve (101), an inner sleeve (102) and two flexible filling bodies (103); the inner sleeve (102) is arranged on the inner side of the outer sleeve (101) and is used to be sleeved on the outer side of the semiconductor winding layer at the cable connection; the flexible filling bodies (103) are arranged on both sides of the inner sleeve (102) on the outer sleeve (101) and are used to fill the gap between the outer sleeve (101), the inner sleeve (102) and the cable insulator.

2. A cable intermediate hot-melt joint according to claim 1, characterized in that: A connecting belt (3) is provided between two adjacent sleeve joints (1) for connecting two adjacent outer sleeves (101) to facilitate sleeve connection.

3. The cable intermediate hot-melt joint according to claim 1, characterized in that: A plurality of winding belts (2) are arranged on one of the outer sleeves (101), wherein the winding belt (2) comprises a fixing section (201) fixedly arranged on the outer sleeve (101), and a winding section (202) is arranged at the end of the fixing section (201) for initially winding and fixing the outer sleeve (101).

4. The cable intermediate hot-melt joint according to claim 1, characterized in that: The outer sleeve (101) comprises an outer sleeve (1011), and both ends of the outer sleeve (1011) are provided with external stress cones (1012) for optimizing the electric field distribution at the end of the cable insulation and protecting the cable insulation from mechanical stress.

5. A cable intermediate hot-melt joint according to claim 4, characterized in that: The inner sleeve (102) comprises an inner sleeve (1021) arranged in an outer sleeve (1011), and inner cone grooves (1022) are arranged on both sides of the inner sleeve (1021) for fitting and docking with the stress cone at the end of the cable insulator.

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