Lengthened cold shrinkage intermediate joint

Abstract

The utility model discloses a lengthened cold shrinkage intermediate joint, which comprises two cables, a connecting pipe and a joint main body. Each cable is provided with a conductor, the connecting pipe comprises a solid part and two connecting parts connected to the two ends of the solid part respectively, each connecting part is connected with the conductor of one cable, and the length of the solid part is not smaller than 200 mm; and the connector main body is coated outside the cable and the connecting pipe. The connecting pipe is used for cable first-aid repair, the length of the solid part of the connecting pipe is increased, so that the connecting pipe can be used for connecting two cables of which the end parts are long-spaced, fault positions and nearby positions of the cables can be completely cut during first-aid repair, the processing is more convenient, and the connecting pipe is suitable for the situation of smaller excavation space; compared with a conventional first-aid repair scheme that one cable needs to be added and two ends of the cable are respectively provided with a middle head, the use of materials required during first-aid repair can be reduced, the first-aid repair cost is reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable accessories, in particular to an extended cold shrinkage intermediate joint. Background Art

[0002] When repairing cables, since cables are generally not reserved in the cable trench, the common repair method is to cut off the cable fault, add a cable about 5 meters long, and install an intermediate joint at both ends of the added cable. This repair plan adds extra manpower and material resources, has high construction costs, long construction periods, and increases weak points in the line.

[0003] Moreover, for some direct buried cable lines, the conventional method is to dig 4 to 6 meters of space on the ground for cable repair. However, in some places with densely built buildings or other complex working conditions, the excavation length is insufficient. For single-core cable repair, only 2 to 3 meters of space can be excavated, and for three-core cable repair, the excavation length is 3 to 4 meters. Conventional repair methods cannot be implemented.

[0004] In view of this, it is necessary to provide an extended cold shrink intermediate joint to improve the repair efficiency, reduce the repair cost, and be suitable for situations where the excavation space is small. Utility Model Content

[0005] The main purpose of the utility model is to provide an extended cold shrinkage intermediate joint, aiming to solve the technical problems of the existing emergency repair schemes being high in cost, low in efficiency and limited by the excavation space.

[0006] To achieve the above purpose, the utility model provides an extended cold shrink intermediate joint, comprising:

[0007] two cables, each cable having a conductor;

[0008] A connecting tube, comprising a solid portion and two connecting portions respectively connected to both ends of the solid portion, each connecting portion being respectively connected to a conductor of a cable, and a length of the solid portion being not less than 200 mm; and

[0009] The connector body is covered on the outside of the cable and the connecting tube.

[0010] Optionally, the length of the solid portion is 205-310 mm.

[0011] Optionally, the connecting portion is connected to the conductor by crimping.

[0012] Optionally, a semi-conductive tape is wrapped around the outside of the connecting tube, and the joint body is entirely wrapped around the outside of the semi-conductive tape.

[0013] Optionally, the joint body includes an insulating layer and a shielding tube built into the insulating layer, the shielding tube is arranged corresponding to the position of the connecting tube, and the length of the shielding tube is not less than the length of the connecting tube.

[0014] Optionally, stress tubes are built into both ends of the joint body.

[0015] Optionally, the insulating layer is made of insulating silicone rubber material.

[0016] The extended cold shrink intermediate joint of the technical solution of the utility model is used for cable emergency repair. Since the length of the solid part of the connecting pipe is increased, it can be used to connect two cables with long end intervals. During emergency repair, the fault part and the nearby position of the cable can be completely cut, which is more convenient to handle and suitable for situations where the excavation space is small. Compared with the conventional emergency repair solution that requires adding a cable and installing an intermediate head at each end of the cable, the utility model can reduce the use of materials required for emergency repair, reduce the emergency repair cost, and improve installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of an extended cold shrinkable intermediate joint of the utility model;

[0019] Figure 2 This is a structural schematic diagram of an embodiment of a connecting pipe of the utility model;

[0020] Figure 3 It is a structural schematic diagram of an embodiment of a joint body of the utility model.

[0021] Description of Figure Numbers:

[0022]

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0028] The utility model provides an extended cold shrink intermediate joint 100, please refer to Figure 1 and Figure 2The elongated cold shrink intermediate joint 100 includes two cables 10, a connecting tube 20 and a joint body 30. Each cable 10 has a conductor 11, and the connecting tube 20 includes a solid part 21 and two connecting parts 22 respectively connected to both ends of the solid part 21, each connecting part 22 is respectively connected to the conductor 11 of a cable 10, and the length of the solid part 21 is not less than 200mm; the joint body 30 is coated on the outside of the cable 10 and the connecting tube 20.

[0029] The extended cold shrink intermediate joint 100 of the technical solution of the utility model is used for cable emergency repair. Since the length of the solid part 21 of the connecting tube 20 is increased, it can be used to connect two cables with long end intervals. During emergency repair, the fault part and the nearby position of the cable can be completely cut, which is more convenient to handle and suitable for situations where the excavation space is small. Compared with the conventional emergency repair solution that requires adding a cable and installing an intermediate head at each end of the cable, the utility model can reduce the use of materials required for emergency repair, reduce the emergency repair cost, and improve installation efficiency.

[0030] Preferably, the length of the solid portion 21 is 205-310 mm, which can meet the connection of two cables with a long spacing, so that the fault point of the cable can be cut 200-300 mm, and the fault point and adjacent positions can be completely cut off, which is more convenient to operate. It can be understood that the extended cold shrink intermediate joint 100 of the utility model is mainly used for emergency repair of 10kV cables during operation failures, and can also be used as a conventional joint.

[0031] In this embodiment, the connection portion 22 is connected to the conductor 11 by crimping. Specifically, the connection tube 20 and the conductor 11 are made of the same material. The connection portion 22 is tubular and the conductor 11 is received in the connection portion 22 .

[0032] Specifically, the connecting tube 20 is wrapped with a semi-conductive tape 40 for overall cable repair, and the connector body 30 is entirely wrapped around the semi-conductive tape 40 to ensure electrical and mechanical properties at the connector.

[0033] Please also read Figure 3 In this embodiment, the connector body 30 is a cold shrink connector, which specifically includes an insulating layer 31 and a shielding tube 32 built into the insulating layer 31. The shielding tube 32 is arranged corresponding to the position of the connecting tube 20. The length of the shielding tube 32 is not less than the length of the connecting tube 20. The length of the connector body 30 needs to match the length of the connecting tube 20. In this way, after the crimping is completed, the connecting tube can be repaired in a conventional way to improve the stability of the cable operation.

[0034] In this embodiment, the cable 10 at least includes a conductor 11, an insulating layer, a semi-conductive layer, etc., which are arranged in sequence from the inside to the outside. During emergency repair, the ends of the cable 10 need to be stripped to expose the conductor 11, the insulating layer, the semi-conductive layer, etc., and then the connecting tube 20 is crimped and the shrink joint body is installed. Specifically, stress tubes 33 are built into both ends of the joint body 30, and the stress tubes 33 are installed at the junction of the insulating layer and the semi-conductive layer of the cable 10 to disperse the electric field. The insulating layer 31 is made of insulating silicone rubber material and has good insulation performance.

[0035] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An extended cold shrink intermediate joint, characterized in that: The extended cold shrink intermediate joint comprises: two cables, each cable having a conductor; A connecting tube, comprising a solid portion and two connecting portions respectively connected to both ends of the solid portion, each connecting portion being respectively connected to a conductor of a cable, and a length of the solid portion being not less than 200 mm; and The connector body is covered on the outside of the cable and the connecting tube.

2. The elongated cold shrink intermediate joint according to claim 1, characterized in that: The length of the solid portion is 205-310 mm.

3. The elongated cold shrink intermediate joint according to claim 1, characterized in that: The connecting portion is connected to the conductor by crimping.

4. The elongated cold shrink intermediate joint according to claim 1, characterized in that: The outside of the connecting tube is wrapped with a semi-conductive tape, and the joint body is entirely wrapped around the outside of the semi-conductive tape.

5. The elongated cold shrink intermediate joint according to claim 1, characterized in that: The joint body includes an insulating layer and a shielding tube built into the insulating layer. The shielding tube is arranged corresponding to the position of the connecting tube, and the length of the shielding tube is not less than the length of the connecting tube.

6. The elongated cold shrink intermediate joint according to claim 5, characterized in that: Stress tubes are built in at both ends of the joint body.

7. The elongated cold shrink intermediate joint according to claim 5, characterized in that: The insulating layer is made of insulating silicone rubber material.

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