Micro-corrugated aluminum sheath high-voltage cable

Abstract

The utility model provides a high-voltage cable with a micro corrugated aluminum sheath, which relates to the technical field of cables and comprises an outer sheath, an aluminum sheath body is arranged between the inner surface walls of the outer sheath, the outer surface and the inner surface walls of the outer sheath are corrugated, and the outer surface of the aluminum sheath body is provided with corrugations at equal intervals. According to the high-voltage cable, the surface of the aluminum sheath body is provided with the corrugation, and the corrugation depth is the micro corrugation of 0.5-1mm, so that the aluminum sheath has good bending performance and pressure measurement resistance of a corrugated aluminum sheath, and also has the advantages of being in plane contact with an inner layer structure like a flat aluminum sheath, large in contact area, small in current density, good in anti-interference performance and the like. Therefore, the high-voltage cable has the advantages of a traditional corrugated aluminum sheath cable and a traditional flat aluminum sheath cable, and the disadvantages of the traditional corrugated aluminum sheath cable and the flat aluminum sheath cable are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a micro-corrugated aluminum sheathed high-voltage cable. Background Art

[0002] High-voltage cable is a type of power cable, which refers to a power cable used to transmit power between 1kv-1000kv. It is mostly used in power transmission and distribution. In the past two or three decades, aluminum sheathed high-voltage cables have adopted corrugated aluminum sheaths. The corrugated aluminum sheath depth is generally controlled between 3.5-7.5mm. The larger the cable diameter and the thicker the aluminum sheath, the deeper the corrugation depth. In recent years, flat aluminum sheathed high-voltage cables have appeared.

[0003] When the aluminum sheathed high-voltage cable adopts the corrugated aluminum sheath, it has the advantages of good cable bending performance and good pressure measurement resistance. However, the aluminum sheath and the inner wall are in spiral contact with other structures, there is a large current density, and after long-term operation, the inner layer material is prone to serious quality problems such as ablation. Although the flat aluminum sheath is in planar contact with other structures, the contact area is large, the current density is small, and the ablation problem can be avoided, but the bending performance is poor, and creases and crushing injuries are prone to occur. Therefore, in response to the above problems, we propose a new type of micro-corrugated aluminum sheathed high-voltage cable. Utility Model Content

[0004] The utility model mainly provides a micro-wrinkled aluminum sheathed high-voltage cable with good bending performance and compression resistance and capable of avoiding the ablation problem.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a micro-corrugated aluminum sheath high-voltage cable, comprising an outer sheath, an aluminum sheath body is arranged between the inner surface walls of the outer sheath, the outer surface and the inner surface wall of the outer sheath are both corrugated, the outer surface of the aluminum sheath body is equidistantly provided with ribs, the depth of the ribs is 0.5mm-1mm, a shielding layer is arranged between the inner surface walls of the aluminum sheath body, a filling layer is arranged between the inner surface walls of the shielding layer, a first insulating sleeve is arranged between the inner surface walls of the filling layer, a conductor is arranged between the inner surface walls of the first insulating sleeve, and a connecting mechanism is arranged between the conductor and the outer surface of the first insulating sleeve.

[0006] Preferably, the inner wall of the first insulating sleeve is provided with bevels near both ends, and the outer diameter of the conductor is 10 mm. The bevels provided on the inner wall of the first insulating sleeve facilitate the insertion of the first or second inserting strip between the first insulating sleeve and the conductor.

[0007] Preferably, the outer diameter of the first insulating sleeve is 3 mm, the inner wall of the first insulating sleeve is in close contact with the outer surface of the conductor, and the first insulating sleeve is made of silicone rubber material, which has high and low temperature resistance and good flexibility. Due to its good flexibility, the first insulating sleeve is not easily damaged during the bending process of the high-voltage cable, thereby ensuring the insulation effect on the conductor.

[0008] Preferably, the outer diameter of the filling layer is 10 mm, the inner wall of the filling layer is in close contact with the outer surface of the first insulating sleeve, the filling layer is composed of a water-absorbing resin, and will absorb water and swell after water seepage or moisture, and has a good waterproof effect, thereby preventing moisture from entering the conductor to cause leakage, thereby improving safety, and the filling layer made of the water-absorbing resin material has good buffering properties, which can provide a good buffering effect for the conductor and increase the service life of the high-voltage cable.

[0009] Preferably, the thickness of the shielding layer is 0.3 mm, the inner surface wall of the shielding layer and the inner surface wall of the filling layer are tightly fitted, the shielding layer material is tinned copper wire, and is made by conventional weaving technology, and has good electromagnetic shielding effect and corrosion resistance.

[0010] Preferably, the connecting mechanism includes a conductive ring, the right surface of the conductive ring is tightly fitted with the left end of the conductor, and the conductive ring, the first plug-in strip and the second plug-in strip are all made of copper alloy material, which has excellent conductivity and good hardness, and can provide a good current transmission effect when the two conductors are connected.

[0011] Preferably, a plurality of first plug-in strips are equidistantly arranged on the right surface of the conductive ring, and the first plug-in strips are inserted between the outer surface of the conductor and the inner surface wall of the first insulating sleeve. When the high-voltage cable is connected and extended, the first plug-in strips on the right surface of the conductive ring can be inserted between the conductor and the first insulating sleeve, thereby extending the length of the conductor through the conductive ring and the first plug-in strips.

[0012] Preferably, multiple first barbs are provided on the outer surfaces of opposite sides of the multiple first inserting strips, and the cross-section of the first barbs is triangular. When the first inserting strip is inserted between the conductor and the first insulating sleeve, the triangular first barbs on the surface of the first inserting strip will not increase the friction force of the first inserting strip, the conductor and the first insulating sleeve bracket too much. After the first inserting strip is inserted, the first barbs will be stuck on the surface of the conductor, making it difficult to pull out the first inserting strip, thereby increasing the firmness between the conductive ring and the conductor.

[0013] Preferably, a plurality of second plug-ins are equidistantly fixedly connected to the left surface of the conductive ring, and a plurality of second barbs are provided on the outer surfaces of the opposite sides of the plurality of second plug-ins. The connection between the two conductors can be completed by inserting the second plug-in strip between the conductor of another high-voltage cable and the first insulating sleeve, and under the action of the second barbs, the second plug-in strip and the conductor in the other high-voltage cable are connected firmly.

[0014] Preferably, the right end of the first plug and the left end of the second plug are both inclined, and the ends of the first plug and the second plug are arranged to be inclined inward, so that the first plug and the second plug are inserted between the conductor and the first insulating sleeve more smoothly and conveniently.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] 1. In the utility model, the high-voltage cable adopts micro-grooving with a groove depth of 0.5mm-1mm on the surface of the aluminum sheath body, so that the aluminum sheath has good bending performance and pressure resistance of the corrugated aluminum sheath, and at the same time has the same contact with the inner layer structure plane as the flat aluminum sheath, with a large contact area and low current density, which can effectively avoid the problem of ablation. Therefore, the high-voltage cable has the advantages of traditional corrugated aluminum sheath cables and flat aluminum sheath cables and avoids their respective disadvantages.

[0017] 2. In the utility model, when the high-voltage cable needs to be connected and extended, the connection between the two conductors can be completed by inserting the first plug-in strip on the right side of the conductive ring between the right conductor and the first insulating sleeve, and then inserting the second plug-in strip on the left side of the conductive ring between the left conductor and the first insulating sleeve. Under the action of the first barb and the second barb, the connection firmness between the conductive ring and the conductors on both sides can be greatly increased, and the oblique design facilitates the insertion of the first plug-in strip and the second plug-in strip. The design structure is simple and reasonable, and the basic electrical connection between the two high-voltage cables can be quickly completed. Subsequently, other structural layers can be connected and sealed, thereby improving the installation and maintenance efficiency of the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a micro-corrugated aluminum sheathed high-voltage cable is proposed for the utility model;

[0019] Figure 2 The utility model proposes an expanded diagram of a micro-corrugated aluminum sheathed high-voltage cable;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 The utility model provides a schematic diagram of the connection mechanism structure of a micro-corrugated aluminum sheathed high-voltage cable.

[0022] Legend: 1. Conductor; 2. First insulating sleeve; 21. Bevel; 3. Filling layer; 4. Shielding layer; 5. Aluminum sleeve body; 51. Ribbon; 6. Outer sleeve; 7. Connecting mechanism; 701. Conductive ring; 702. First insert; 703. First barb; 704. Second insert; 705. Second barb. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0025] See also Figure 1-Figure 4 The utility model provides a technical solution: a micro-corrugated aluminum sheath high-voltage cable, comprising an outer sheath 6, an aluminum sheath body 5 is arranged between the inner surface walls of the outer sheath 6, the outer surface and the inner surface wall of the outer sheath 6 are both corrugated, and the outer surface of the aluminum sheath body 5 is equidistantly provided with ribs 51, the depth of the ribs 51 is 0.5mm-1mm, a shielding layer 4 is arranged between the inner surface walls of the aluminum sheath body 5, a filling layer 3 is arranged between the inner surface walls of the shielding layer 4, a first insulating sleeve 2 is arranged between the inner surface walls of the filling layer 3, a conductor 1 is arranged between the inner surface walls of the first insulating sleeve 2, and a connecting mechanism 7 is arranged between the conductor 1 and the outer surface of the first insulating sleeve 2.

[0026] like Figure 2 and Figure 3 As shown, the inner wall of the first insulating sleeve 2 is provided with oblique openings 21 near both ends, and the outer diameter of the conductor 1 is 10 mm. The oblique openings 21 are provided on the inner wall of the first insulating sleeve 2 to facilitate the insertion of the first inserting strip 702 or the second inserting strip 704 between the first insulating sleeve 2 and the conductor 1.

[0027] like Figure 1 and Figure 2 As shown, the outer diameter of the first insulating sleeve 2 is 3 mm, the inner wall of the first insulating sleeve 2 is tightly fitted to the outer surface of the conductor 1, and the first insulating sleeve 2 is made of silicone rubber material, which has high and low temperature resistance and good flexibility. Due to its good flexibility, the first insulating sleeve 2 is not easily damaged during the bending process of the high-voltage cable, thereby ensuring the insulation effect on the conductor 1.

[0028] like Figure 1and Figure 2 As shown, the outer diameter of the filling layer 3 is 10 mm, the inner wall of the filling layer 3 is in close contact with the outer surface of the first insulating sleeve 2, and the filling layer 3 is composed of a water-absorbing resin. After water seepage or moisture, it will absorb water and swell, and has a good waterproof effect, thereby preventing moisture from entering the conductor 1 to cause leakage, thereby improving safety, and the filling layer 3 made of the water-absorbing resin material has good buffering properties, which can provide a good buffering effect for the conductor 1 and improve the service life of the high-voltage cable.

[0029] like Figure 1 and Figure 2 As shown, the thickness of the shielding layer 4 is 0.3 mm, the inner surface wall of the shielding layer 4 and the inner surface wall of the filling layer 3 are tightly fitted, the shielding layer 4 is made of tinned copper wire, and is made by conventional weaving technology, and has good electromagnetic shielding effect and corrosion resistance.

[0030] like Figure 1 , Figure 2 and Figure 4 As shown, the connecting mechanism 7 includes a conductive ring 701, the right surface of the conductive ring 701 is tightly fitted with the left end of the conductor 1, and the conductive ring 701, the first plug-in bar 702 and the second plug-in bar 704 are all made of copper alloy material, which has excellent conductive properties and good hardness, and can provide a good current transmission effect when the two conductors 1 are connected.

[0031] like Figure 1 , Figure 2 and Figure 4 As shown, a plurality of first plug-in strips 702 are equidistantly arranged on the right surface of the conductive ring 701, and the first plug-in strips 702 are inserted between the outer surface of the conductor 1 and the inner surface wall of the first insulating sleeve 2. When the high-voltage cable is connected and extended, the first plug-in strips 702 on the right surface of the conductive ring 701 can be inserted between the conductor 1 and the first insulating sleeve 2, thereby extending the length of the conductor 1 through the conductive ring 701 and the first plug-in strips 702.

[0032] like Figure 1 , Figure 2 and Figure 4 As shown, the outer surfaces of the opposite sides of the plurality of first inserting strips 702 are each provided with a plurality of first barbs 703, and the cross-section of the first barbs 703 is triangular. When the first inserting strip 702 is inserted between the conductor 1 and the first insulating sleeve 2, the triangular first barbs 703 on the surface of the first inserting strip 702 will not increase the friction force of the first inserting strip 702, the conductor 1 and the first insulating sleeve 2 bracket too much. After the first inserting strip 702 is inserted, the first barbs 703 will be stuck on the surface of the conductor 1, and the first inserting strip 702 is difficult to be pulled out, thereby increasing the firmness between the conductive ring 701 and the conductor 1.

[0033] like Figure 1 , Figure 2and Figure 4 As shown, a plurality of second plug-in strips 704 are equidistantly fixedly connected to the left surface of the conductive ring 701, and a plurality of second barbs 705 are provided on the outer surfaces of the opposite sides of the plurality of second plug-in strips 704. The connection between the two conductors 1 can be completed by inserting the second plug-in strip 704 between the conductor 1 of another high-voltage cable and the first insulating sleeve 2, and under the action of the second barbs 705, the second plug-in strip 704 and the conductor 1 in the other high-voltage cable are connected firmly.

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, the right end of the first plug strip 702 and the left end of the second plug strip 704 are both inclined, and the ends of the first plug strip 702 and the second plug strip 704 are arranged to be inclined inward, so that the first plug strip 702 and the second plug strip 704 can be inserted between the conductor 1 and the first insulating sleeve 2 more smoothly and conveniently.

[0035] The use method and working principle of the device: The high-voltage cable adopts the micro-corrugations 51 on the surface of the aluminum sheath body 5, and the depth of the corrugations 51 is 0.5mm-1mm, so that the aluminum sheath has the good bending performance and pressure resistance of the corrugated aluminum sheath, and at the same time has the same contact with the inner layer structure plane as the flat aluminum sheath, with a large contact area and a small current density, which can effectively avoid the problem of ablation. Therefore, the high-voltage cable has the advantages of traditional corrugated aluminum sheath cables and flat aluminum sheath cables and avoids their respective disadvantages. At the same time, when the high-voltage cable needs to be connected and extended, by connecting the first plug 7 on the right side of the conductive ring 701 02 is inserted between the right conductor 1 and the first insulating sleeve 2, and then the second plug 704 on the left side of the conductive ring 701 is inserted between the left conductor 1 and the first insulating sleeve 2 to complete the connection between the two conductors 1, and under the action of the first barb 703 and the second barb 705, the connection firmness between the conductive ring 701 and the conductors 1 on both sides can be greatly increased, and the design of the oblique mouth 21 facilitates the insertion of the first plug 702 and the second plug 704. The design structure is simple and reasonable, and the basic electrical connection between the two high-voltage cables can be quickly completed. Subsequently, other structural layers can be connected and sealed, thereby improving the installation and maintenance efficiency of the high-voltage cable.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A micro-corrugated aluminum sheathed high voltage cable, comprising an outer sheath (6), characterized in that: An aluminum sheath body (5) is arranged between the inner surface walls of the outer sheath (6); the outer surface and the inner surface wall of the outer sheath (6) are both in a corrugated shape; the outer surface of the aluminum sheath body (5) is provided with ribs (51) at equal intervals; the depth of the ribs (51) is 0.5 mm-1 mm; a shielding layer (4) is arranged between the inner surface walls of the aluminum sheath body (5); a filling layer (3) is arranged between the inner surface walls of the shielding layer (4); a first insulating sleeve (2) is arranged between the inner surface walls of the filling layer (3); a conductor (1) is arranged between the inner surface walls of the first insulating sleeve (2); and a connecting mechanism (7) is arranged between the conductor (1) and the outer surface of the first insulating sleeve (2).

2. A micro-corrugated aluminum sheathed high voltage cable according to claim 1, characterized in that: The inner surface wall of the first insulating sleeve (2) is provided with oblique openings (21) near both ends, and the outer diameter of the conductor (1) is 10 mm.

3. A micro-corrugated aluminum sheathed high voltage cable according to claim 2, characterized in that: The outer diameter of the first insulating sleeve (2) is 3 mm, and the inner surface wall of the first insulating sleeve (2) is tightly fitted to the outer surface of the conductor (1).

4. A micro-corrugated aluminum sheathed high voltage cable according to claim 3, characterized in that: The outer diameter of the filling layer (3) is 10 mm, and the inner surface wall of the filling layer (3) is tightly fitted to the outer surface of the first insulating sleeve (2).

5. A micro-corrugated aluminum sheathed high voltage cable according to claim 4, characterized in that: The thickness of the shielding layer (4) is 0.3 mm, and the inner surface wall of the shielding layer (4) and the inner surface wall of the filling layer (3) are tightly fitted.

6. A micro-corrugated aluminum sheathed high voltage cable according to claim 5, characterized in that: The connecting mechanism (7) comprises a conductive ring (701), the right surface of the conductive ring (701) being tightly fitted to the left end of the conductor (1).

7. A micro-corrugated aluminum sheathed high voltage cable according to claim 6, characterized in that: A plurality of first insertion strips (702) are equidistantly arranged on the right surface of the conductive ring (701), and the first insertion strips (702) are inserted between the outer surface of the conductor (1) and the inner surface wall of the first insulating sleeve (2).

8. The micro-corrugated aluminum sheathed high-voltage cable according to claim 7, characterized in that: The outer surfaces of the opposite sides of the plurality of first insert strips (702) are each provided with a plurality of first barbs (703), and the cross-section of the first barbs (703) is arranged in a triangular shape.

9. A micro-corrugated aluminum sheathed high voltage cable according to claim 8, characterized in that: A plurality of second inserting strips (704) are fixedly connected to the left surface of the conductive ring (701) at equal intervals, and a plurality of second barbs (705) are arranged on the outer surfaces of the opposite sides of the plurality of second inserting strips (704).

10. A micro-corrugated aluminum sheathed high voltage cable according to claim 9, characterized in that: The right end of the first insert (702) and the left end of the second insert (704) are both inclined.

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