Wrapping type cable joint

Abstract

The wrapping type cable joint comprises a cable body (100), a wrapping layer (200) and a wrapping layer (300), the joint outer shielding layer (10) is positioned on the outer side of the radial direction (R) of the cable body (100) and comprises a first joint outer shielding layer part (101) and a second joint outer shielding layer part (102), and the first joint outer shielding layer part and the second joint outer shielding layer part are separated from each other; the cable body (100) partially overlaps in the radial direction (R) of the cable body (100) to form an overlapped part; and an outer shield insulation layer (20) formed at the overlapping portion and at least between the first joint outer shield layer portion (101) and the second joint outer shield layer portion (102) to prevent the first joint outer shield layer portion (101) and the second joint outer shield layer portion (102) from coming into contact.

Description

Technical Field

[0001] This utility model relates to a wrap-around cable connector. Background Technology

[0002] Typically, for high-voltage single-core cables longer than 500m, the induced voltage in the cable's metallic sheath can easily exceed safe levels. Therefore, in traditional methods, the metallic sheath is typically grounded every 500m of cable. However, grounding both ends of the cable's metallic sheath generates a high circulating current, which can cause the sheath to overheat and potentially damage it. Therefore, it is necessary to interrupt the electrical connection of the cable's metallic sheath to prevent the formation of circulating currents. Utility Model Content

[0003] The purpose of this invention is to provide a wrap-around cable connector that can interrupt the electrical connection between the cable's metal sheaths while connecting the cable conductors, thereby improving the cable's service life.

[0004] On one hand, a wrapped cable connector is provided, comprising: a cable body; an outer shielding layer located on the outer side of the cable body in the radial direction, the outer shielding layer comprising a first outer shielding layer portion and a second outer shielding layer portion, the first outer shielding layer portion and the second outer shielding layer portion being separate from each other and partially overlapping in the radial direction of the cable body to form an overlapping portion; and an outer shielding insulation break formed at the overlapping portion and at least between the first outer shielding layer portion and the second outer shielding layer portion to prevent the first outer shielding layer portion and the second outer shielding layer portion from contacting each other.

[0005] In one embodiment, the outer shielding insulation break includes a first outer shielding insulation break portion that at least partially wraps around the second connector outer shielding break portion radially outward and is located between the first connector outer shielding break portion and the second connector outer shielding break portion; and the first connector outer shielding break portion includes a main body portion and a protruding portion that extends from the main body portion and at least partially wraps around the first outer shielding insulation break portion.

[0006] In one embodiment, the wrapped cable connector further includes a main insulation layer configured to wrap around the cable body; and the main body portion of the first connector outer shielding layer portion and the second connector outer shielding layer portion are configured to wrap around the main insulation layer.

[0007] In one embodiment, a gap is formed between the main body portion and the second connector outer shielding layer portion, and the gap is filled by the first outer shielding insulation layer portion.

[0008] In one embodiment, the length of the interval is at least 17 mm.

[0009] In one embodiment, the outer shielding insulation layer further includes a second outer shielding insulation layer portion, the second outer shielding insulation layer portion being configured to at least partially wrap around the protruding portion of the first connector outer shielding layer portion.

[0010] In one embodiment, the thickness of the first outer shielding insulation layer portion and the thickness of the second outer shielding insulation layer portion are both at least 5 mm.

[0011] In one embodiment, the outer shielding layer of the connector is composed of a semiconductor layer and a metal strip layer surrounding the semiconductor layer.

[0012] In one embodiment, the metal strip layer is a copper mesh sleeve.

[0013] In one embodiment, the wrapped cable joint further includes an electrical stress control strip that at least partially wraps around the cable body. Attached Figure Description

[0014] Figure 1 A cross-sectional view of a wrapped cable connector according to an embodiment of the present invention is shown. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of this utility model with reference to the accompanying drawings is intended to explain the overall inventive concept of this utility model and should not be construed as a limitation thereof.

[0016] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details.

[0017] Figure 1 A cross-sectional view of a wrapped cable connector according to an embodiment of the present invention is shown. Figure 1As shown, the wrapped cable joint includes a cable body 100 for power transmission. The wrapped cable joint also includes an outer shielding layer 10 located outside the cable body 100 in the radial direction R. The outer shielding layer 10 is grounded, so that the cable joint is in a grounded shielding state, ensuring a uniform electric field inside the cable joint and avoiding electric field distortion or breakdown discharge.

[0018] According to an embodiment of the present invention, the outer shielding layer 10 of the connector may include a first outer shielding layer portion 101 and a second outer shielding layer portion 102. The first outer shielding layer portion 101 and the second outer shielding layer portion 102 are configured to be separate from each other and partially overlap in the radial direction R of the cable body 100 to form an overlapping portion. As an example, unlike the conventional method of forming a continuous, integral outer shielding layer by continuously wrapping tape at appropriate locations, in forming the outer shielding layer 10 of the connector according to an embodiment of the present invention, the first outer shielding layer portion 101 and the second outer shielding layer portion 102 can be formed separately in separate steps, and these two portions are separated from each other without electrical connection. The formed first outer shielding layer portion 101 and the second outer shielding layer portion 102 together constitute the outer shielding layer 10 of the connector wrapped around the radially outer side of the cable body 100.

[0019] like Figure 1 As shown, the wrapped cable joint also includes an outer shielding insulation layer 20. This outer shielding insulation layer 20 is formed at the overlap between the first joint outer shielding layer portion 101 and the second joint outer shielding layer portion 102, and is formed at least between the first joint outer shielding layer portion 101 and the second joint outer shielding layer portion 102. As an example, the outer shielding insulation layer 20 can be formed at the overlap by forming the outer shielding insulation layer 20 within a certain range at the location where the overlap is to be formed.

[0020] In such Figure 1In the illustrated embodiment, to partially overlap the first connector outer shielding layer portion 101 and the second connector outer shielding layer portion 102 in the radial direction R, suitable tape can first be wrapped around a suitable position to form the second connector outer shielding layer portion 102. Then, at least partially, the tape is wrapped around the radially outer side of the second connector outer shielding layer portion 102 to form an outer shielding insulation break 20 (specifically, the first outer shielding insulation break portion 201 of the outer shielding insulation break 20). Next, the outer shielding insulation break 20 can be wrapped around the radially outer side to form a corresponding portion of the first connector outer shielding layer portion 101 (specifically, the protruding portion 1012 of the first connector outer shielding layer portion 101). Thus, by providing the outer shielding insulation break 20 as a support between the first connector outer shielding layer portion 101 and the second connector outer shielding layer portion 102, an overlapping arrangement between the two can be achieved.

[0021] In this way, by forming the outer shielding layer 10 of the connector with two separate parts, the electrical connection of the outer shielding layer 10 is interrupted, thereby eliminating or at least reducing the circulating current formed in the metal layer or metal mesh constituting the outer shielding layer 10, preventing the cable metal sheath from overheating and damaging the cable. Furthermore, by partially overlapping the first outer shielding layer portion 101 and the second outer shielding layer portion 102, and providing an outer shielding insulation break 20 between them, it is possible to prevent the first outer shielding layer portion 101 and the second outer shielding layer portion 102 from contacting, further ensuring the disconnection of the electrical connection. In addition, the overlapping arrangement of the two outer shielding layer portions and the supporting arrangement of the outer shielding insulation break ensure that the electric field shielding performance of the outer shielding layer 10 is maintained without being weakened or reduced due to the interruption of the electrical connection of the outer shielding layer 10.

[0022] It should be noted that, Figure 1 The embodiments shown are merely examples, and the embodiments of this utility model are not limited thereto. For example, the outer shielding layer portion 101 of the first connector can be wrapped around first, and then the outer shielding layer portion 102 of the second connector can be wrapped around the radially outer side of the outer shielding layer portion 101 of the first connector.

[0023] In one embodiment, such as Figure 1 As shown, the outer shielding insulation layer 20 includes a first outer shielding insulation layer portion 201. The first outer shielding insulation layer portion 201 at least partially wraps around the second connector outer shielding layer portion 102 radially outward and is located between the first connector outer shielding layer portion 101 and the second connector outer shielding layer portion 102. The first connector outer shielding layer portion 101 includes a main portion 1011 and a protruding portion 1012. The protruding portion 1012 extends from the main portion 1011 and at least partially wraps around the first outer shielding insulation layer portion 201.

[0024] Furthermore, the wrapped cable joint also includes a main insulation layer 3. The main insulation layer 3 is configured to wrap around the cable body 100. The main body portion 1011 of the first joint outer shielding layer portion 101 and the second joint outer shielding layer portion 102 are configured to wrap around the main insulation layer 3.

[0025] As an example, in manufacturing a wrapped cable connector according to an embodiment of the present invention, a main insulation layer 3 can first be formed by wrapping it radially outward of the cable body 100. It should be noted that the formation of the cable body 100 and the main insulation layer 3 is a conventional manufacturing method in the art, and therefore is not described in detail herein. Subsequently, the main body portion 1011 of the first connector outer shielding layer portion 101 and the second connector outer shielding layer portion 102 can be formed by wrapping them radially outward of the main insulation layer 3, respectively. For example... Figure 1 As shown, the main body portion 1011 and the second connector outer shielding layer portion 102 are formed to be separated from each other to ensure the interruption of electrical connection. Then, at the overlapping portion to be formed, a first outer shielding insulation break portion 201 is formed by wrapping around the radially outer side of the second connector outer shielding layer portion 102. Next, a protruding portion 1012 is formed by wrapping around the radially outer side of the first outer shielding insulation break portion 201, starting from the end of the main body portion 1011 facing the second connector outer shielding layer portion 102, thereby forming a protruding portion 1012 extending from the main body portion 1011. The main body portion 1011 and the protruding portion 1012 together constitute the first connector outer shielding layer portion 101.

[0026] In this way, the electrical connection of the metal strip layer or metal sheath used for insulation shielding is interrupted by setting the main body portion 1011 of the wrapped main insulation layer 3 and the second connector outer shielding layer portion 102 separately from each other. Furthermore, by further providing the protruding portion 1012 to achieve overlap between the two connector outer shielding layer portions, it can be ensured that the electric field shielding performance of the connector outer shielding layer 10 is not reduced. Thus, the wrapped cable connector according to the embodiment of this utility model can maintain good electric field shielding performance while preventing circulating currents in the cable metal sheath to improve service life.

[0027] It should be noted that the first outer shield insulation section 201 and the protruding portion 1012 can be formed to appropriate lengths depending on the specific cable conditions. Preferably, the first outer shield insulation section 201 can partially wrap around the second connector outer shield layer 102, and the protruding portion 1012 can partially wrap around the first outer shield insulation section 201, such that the first outer shield insulation section 201 is formed to extend a certain distance to both sides along the axial direction A, centered on the overlapping portion between the two connector outer shield layers. However, the embodiments of this utility model are not limited to this.

[0028] In one embodiment, such as Figure 1 As shown, a gap G is formed between the main body portion 1011 and the second connector outer shielding layer portion 102. This gap G is filled by the first outer shielding insulation break portion 201. As described above, the main body portion 1011 and the second connector outer shielding layer portion 102 are formed to be separated from each other, thereby forming a gap G between them. As an example, when wrapping the first outer shielding insulation break portion 201, the wrapping of the first outer shielding insulation break portion 201 can begin from the end of the main body portion 101 facing the second connector outer shielding layer portion 102, until the first outer shielding insulation break portion 201 wraps beyond the overlapping portion. This allows the first outer shielding insulation break portion 201 to fill the entire gap G.

[0029] In this way, since the protruding portion 1012 is formed by wrapping around the radially outer side of the first outer shielding insulation layer portion 201, it is convenient to form the protruding portion 1012 extending from the main body portion 1011, thereby promoting a tight connection between the main body portion 1011 and the protruding portion 1012 to ensure that the electric field shielding performance is maintained. Furthermore, by wrapping the first outer shielding insulation layer portion 201 at the interval G, the electrical connection between the main body portion 1011 and the second connector outer shielding layer portion 102 is also ensured to be interrupted, and the possibility of connecting the protruding portion 1012 to the second connector outer shielding layer portion 102 is blocked.

[0030] In one embodiment, the length of the interval G is at least 17 mm. In this way, the electrical connection between the first connector outer shielding portion 101 and the second connector outer shielding portion 102 can be ensured, thereby preventing circulating currents within the cable's metallic sheath from causing heat generation and damage, thus improving the cable's service life.

[0031] In one embodiment, such as Figure 1 As shown, the outer shielding insulation layer 20 also includes a second outer shielding insulation layer portion 202. This second outer shielding insulation layer portion 202 is configured to at least partially wrap around the protruding portion 1012 of the first connector outer shielding layer portion 101. As an example, after forming the protruding portion 1012, the second outer shielding insulation layer portion 202 can be at least partially wrapped around the radially outer side of the protruding portion 1012, and the second outer shielding insulation layer portion 202 can be connected to the extended portion of the first outer shielding insulation layer portion 201 relative to the protruding portion 1012. For example, the second outer shielding insulation layer portion 202 can be formed by wrapping around the extended portion of the first outer shielding insulation layer portion 201, such that the second outer shielding insulation layer portion 202 is at least partially formed on the radially outer side of the protruding portion 1012.

[0032] In this way, by forming the second outer shielding insulation break portion 202, the second outer shielding insulation break portion 202 can cover the end of the protruding portion 1012 (i.e., the end of the protruding portion 1012 opposite to the connection end of the main body portion 1011) either alone or in conjunction with the first outer shielding insulation break portion 201, thereby further preventing the first connector outer shielding layer portion 101 from connecting with the second connector outer shielding layer portion 102 to ensure the interruption of electrical connection, while also ensuring the reliability of grounding shielding, ensuring the uniformity of the electric field inside the connector, and avoiding electric field distortion or breakdown discharge.

[0033] In one embodiment, the thickness of the first outer shielding insulation break portion 201 and the thickness of the second outer shielding insulation break portion 202 are both at least 5 mm. In this way, the electrical connection between the first connector outer shielding layer portion 101 and the second connector outer shielding layer portion 102 can be interrupted, thereby preventing circulating currents from forming in the cable's metallic sheath, which could cause overheating and damage, thus improving the cable's service life.

[0034] In one embodiment, such as Figure 1 As shown, the outer shielding layer 10 of the connector is composed of a semiconductor layer 1 and a metal strip layer 2 wrapped around the semiconductor layer 1. As an example, the semiconductor layer 1 can be formed by first wrapping it around the semiconductor layer 1, and then the metal strip layer 2 can be formed by wrapping it around the entire radially outer side of the semiconductor layer 1 to form the outer shielding layer 10 of the connector. In this way, by providing the semiconductor layer 1, the electric field within the wrapped cable connector can be made uniform. Furthermore, by providing the metal strip layer 2, the outer shielding layer 10 of the connector can be kept at an equipotential state, ensuring a uniform electric field inside the connector and preventing electric field distortion or breakdown discharge.

[0035] In one embodiment, the metal strip layer 2 can be a copper mesh sleeve.

[0036] In one embodiment, such as Figure 1 As shown, the wrapped cable joint also includes an electrical stress control strip 4 that at least partially wraps around the cable body 100.

[0037] Advantageously, the wrapped cable joint according to an embodiment of the present invention provides a cable joint formed by wrapping with tape, which enables the connection of cable conductors but interrupts the electrical connection of the metal sheath. The wrapped cable joint is made of simple material, only common wrapping tape, making it easy to manufacture and highly economical. Furthermore, in situations such as emergency cable repair, the type of wrapped intermediate joint does not change with the cable conductor cross-section, has a fixed configuration, and is convenient to procure. It can be applied to situations where the cable length is insufficient or the cable diameter is changed during emergency repairs, thus offering high flexibility. In addition, this wrapped cable joint also has excellent waterproof performance, making it suitable for use in coastal areas.

[0038] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation thereof.

[0039] While some embodiments of the present invention have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wrapped cable connector, characterized in that, include: Cable body (100); The connector outer shielding layer (10) located on the outer side of the cable body (100) in the radial direction (R) includes a first connector outer shielding layer portion (101) and a second connector outer shielding layer portion (102). The first connector outer shielding layer portion (101) and the second connector outer shielding layer portion (102) are separated from each other and partially overlap in the radial direction (R) of the cable body (100) to form an overlapping portion. and An outer shielding insulation break (20) is formed at the overlapping portion and at least between the first connector outer shielding layer portion (101) and the second connector outer shielding layer portion (102) to prevent the first connector outer shielding layer portion (101) and the second connector outer shielding layer portion (102) from contacting each other.

2. The wrapped cable joint according to claim 1, characterized in that, The outer shielding insulation layer (20) includes a first outer shielding insulation layer portion (201), which at least partially wraps around the second connector outer shielding layer portion (102) radially outward and is located between the first connector outer shielding layer portion (101) and the second connector outer shielding layer portion (102); and The first connector outer shielding layer portion (101) includes a main body portion (1011) and a protruding portion (1012), the protruding portion (1012) extending from the main body portion (1011) and at least partially wrapping around the first outer shielding insulation layer portion (201).

3. The wrapped cable joint according to claim 2, characterized in that, The wrapped cable joint further includes a main insulation layer (3) configured to wrap around the cable body (100); and The main body portion (1011) of the first connector outer shielding layer portion (101) and the second connector outer shielding layer portion (102) are configured to wrap around the main insulation layer (3).

4. The wrapped cable joint according to claim 3, characterized in that, A gap (G) is formed between the main body portion (1011) and the second connector outer shielding layer portion (102), and the gap (G) is filled by the first outer shielding insulation layer portion (201).

5. The wrapped cable joint according to claim 4, characterized in that, The length of the interval (G) is at least 17 mm.

6. The wrapped cable joint according to claim 2, characterized in that, The outer shielding insulation layer (20) further includes a second outer shielding insulation layer portion (202), which is configured to at least partially wrap around the protruding portion (1012) of the first connector outer shielding layer portion (101).

7. The wrapped cable joint according to claim 6, characterized in that, The thickness of the first outer shielding insulation section (201) and the thickness of the second outer shielding insulation section (202) are both at least 5 mm.

8. The wrapped cable joint according to any one of claims 1-7, characterized in that, The outer shielding layer (10) of the connector is composed of a semiconductor layer (1) and a metal strip layer (2) that wraps around the semiconductor layer (1).

9. The wrapped cable joint according to claim 8, characterized in that, The metal strip layer (2) is a copper mesh sleeve.

10. The wrapped cable joint according to any one of claims 1-7, characterized in that, The wrapped cable joint also includes an electrical stress control strip (4) that at least partially wraps around the cable body (100).

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