Medium-voltage cross-linked polyethylene aluminum alloy light cable

Abstract

The utility model relates to the technical field of aluminum alloy cable production, in particular to a medium-voltage cross-linked polyethylene aluminum alloy light cable, which comprises an aluminum alloy conductor bundle, a cross-linked polyethylene insulating sleeve, a mica wrapping layer, an outer sheath, a heat shrink tube and a filler, and an exhaust port is formed at the junction of the groove and any cross section perpendicular to the axis on the outer sheath. A traditional annular groove formed in the outer sheath is improved into the groove, so that after the cable is cut out at any position, the exhaust port is formed at the junction of the cross section of the cutting surface and the groove, and when the heat shrink tube outside the cable is heated and shrunk, air and water vapor in the groove can always be exhausted between the outer sheath and the heat shrink tube through the exhaust port; therefore, the sealing effect of the heat shrink tube is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy cable production, in particular to a medium voltage cross-linked polyethylene aluminum alloy light cable. Background Technique

[0002] Aluminum alloy power cable is a new type of material power cable with aluminum alloy material as the conductor, adopting advanced technologies such as special roll forming stranded wire production process and annealing treatment. The alloy power cable makes up for the deficiencies of the previous pure aluminum cable. Although it does not improve the electrical conductivity of the cable, its bending performance, anti-creep performance and corrosion resistance are greatly improved, which can ensure the continuous performance stability of the cable under long-term overload and overheating. The conductivity of aluminum alloy is 61.8% of that of copper IACS, the most commonly used reference material, and the current-carrying capacity is 79% of that of copper, which is better than the pure aluminum standard. However, under the same volume, the actual weight of aluminum alloy is about one-third of that of copper. Therefore, the weight of aluminum alloy cable with the same current-carrying capacity is about half of that of copper cable. Using aluminum alloy cable to replace copper cable can reduce the cable weight, lower the installation cost, reduce the wear of equipment and cable, and make the installation work easier.

[0003] In the prior art, annular card slots are arranged on the outer sheath of the aluminum alloy cable, which is convenient for part of the external heat shrinkable tube to be stuck in the card slot after heat shrinkage, helping to make the seal of the outer sheath tighter and forming a better sealing effect. However, during the heating process of the heat shrinkable tube, due to the instant heat sealing near the groove, the internal air and water vapor cannot be discharged in time, resulting in the occurrence of the drum phenomenon, which seriously affects the sealing effect of the heat shrinkable tube. Content of the Utility Model

[0004] In order to solve the problems raised in the above background technique, the utility model provides a medium voltage cross-linked polyethylene aluminum alloy light cable.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A medium voltage cross-linked polyethylene aluminum alloy light cable, comprising an aluminum alloy wire bundle, a cross-linked polyethylene insulating sleeve, a mica wrapping layer, an outer sheath, a heat shrinkable tube and a filler. The aluminum alloy wire bundle is externally wrapped with a cross-linked polyethylene insulating sleeve. A mica wrapping layer is wound and wrapped around the outside of several cross-linked polyethylene insulating sleeves and the filler. The outer sheath is sleeved outside the mica wrapping layer, and the heat shrinkable tube is sleeved outside the outer sheath; a groove is arranged on the outer circumferential surface of the outer sheath, and an exhaust port is formed at the junction of the groove and any cross-section perpendicular to the axis on the outer sheath.

[0007] Further, the groove is a cross-shaped mesh groove.

[0008] Further, the groove is a threaded groove.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0010] The traditional annular groove formed on the outer sheath is improved to a groove. In this way, after the cable is intercepted at any position, since an exhaust port will be formed at the junction of the cross-section of the cutting surface and the groove, when the external heat shrinkable tube is heated and shrunk, the air and water vapor in the groove can always be discharged between the outer sheath and the heat shrinkable tube through the exhaust port, thus greatly improving the sealing effect of the heat shrinkable tube. Description of the Drawings

[0011] Figure 1 is a cross-sectional view of the present utility model.

[0012] Figure 2 is a schematic structural view of the cross-shaped mesh groove in the present utility model.

[0013] Figure 3 is a schematic structural view of the spiral groove in the present utility model.

[0014] In the figure: 1, aluminum alloy wire bundle; 2, cross-linked polyethylene insulation sleeve; 3, mica wrapping layer; 4, outer sheath; 5, heat shrinkable tube; 6, filler; 7, cross-section; 8, exhaust port; 9, groove. Detailed Embodiments Embodiment 1

[0015] Please refer to Figures 1 to 3 , a medium-voltage cross-linked polyethylene aluminum alloy lightweight cable, comprising an aluminum alloy wire bundle 1, a cross-linked polyethylene insulation sleeve 2, a mica wrapping layer 3, an outer sheath 4, a heat shrinkable tube 5 and a filler 6. The aluminum alloy wire bundle 1 is externally wrapped with a cross-linked polyethylene insulation sleeve 2. A mica wrapping layer 3 is wound and wrapped around the outside of several cross-linked polyethylene insulation sleeves 2 and the filler 6. The outer sheath 4 is sleeved outside the mica wrapping layer 3, and the heat shrinkable tube 5 is sleeved outside the outer sheath 4; a groove 9 is formed on the outer circumferential surface of the outer sheath 4, and an exhaust port 8 is formed at the junction of the groove 9 and any cross-section 7 perpendicular to the axis on the outer sheath 4. Embodiment 2

[0016] Please refer to Figure 2 , the groove 9 is a cross-shaped mesh groove. Embodiment 3

[0017] Please refer to Figure 3 , the groove 9 is a spiral groove.

[0018] The working principle of the present utility model is as follows: the traditional annular groove formed in the outer sheath 4 is improved to a groove 9. In this way, after the cable is intercepted at any position, since an exhaust port 8 will be formed at the junction of the cutting surface cross-section 7 and the groove 9, when the external heat shrinkable tube is heated and shrunk, the air and water vapor in the groove 9 can always be discharged between the outer sheath 4 and the heat shrinkable tube 5 through the exhaust port 8, thus greatly improving the sealing effect of the heat shrinkable tube.

[0019] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

[0020] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A medium voltage cross-linked polyethylene aluminum alloy light cable, characterized in that: The invention comprises an aluminum alloy wire bundle (1), a cross-linked polyethylene insulation sleeve (2), a mica sheath (3), an outer sheath (4), a heat shrink tube (5) and a filler (6); the aluminum alloy wire bundle (1) is externally wrapped with a cross-linked polyethylene insulation sleeve (2); the outer portions of the cross-linked polyethylene insulation sleeves (2) and the filler (6) are wrapped with a mica sheath (3); the outer portions of the mica sheath (3) are externally wrapped with the outer sheath (4); and the outer portions of the outer sheath (4) are externally wrapped with the heat shrink tube (5); a groove (9) is provided on the outer circumferential surface of the outer sheath (4); an exhaust port (8) is formed at the intersection of the groove (9) and any cross-section (7) of the outer sheath (4) perpendicular to the axis.

2. A medium voltage cross-linked polyethylene aluminum alloy light cable according to claim 1, characterized in that: The grooves (9) are cross-net-shaped grooves.

3. A medium voltage cross-linked polyethylene aluminum alloy light cable according to claim 1, characterized in that: The groove (9) is a thread-shaped groove.

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