Four-core parallel laying aluminum core overhead cable

Abstract

The utility model relates to the technical field of cables, in particular to a four-core parallel laying aluminum core aerial cable, which comprises four polyethylene insulating protective sleeves, conductors are arranged at the centers of the polyethylene insulating protective sleeves, and a comprehensive protective sleeve is sleeved outside the four polyethylene insulating protective sleeves. A central filling assembly is arranged at the central position of the four polyethylene insulating protective sleeves, the central filling assembly is composed of a plurality of central filling sleeves, an end outer ring sleeve is fixedly installed between every two adjacent central filling sleeves, a plurality of thermal expansion holes are formed in the end outer ring sleeves, the comprehensive protective sleeve is sleeved with an aluminum shielding protective sleeve, and the aluminum shielding protective sleeve is sleeved with an outer sheath. The aluminum shielding sheath is sleeved with an inner steel tape armoring layer, the inner steel tape armoring layer is sleeved with an outer steel tape armoring layer, and the outer steel tape armoring layer is sleeved with an outer insulating sheath. The utility model has a better thermal expansion protection effect, is not easy to burst, and is beneficial to prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a four-core parallel-laid aluminum core overhead cable. Background Art

[0002] Four-core parallel-laid aluminum core cable refers to a cable with four aluminum cores inside, which are arranged in a matrix shape. Four-core parallel-laid aluminum core cable is usually suspended at high altitudes for wiring operations. A frame for supporting the four-core parallel-laid aluminum core cable is usually installed on the ground to prevent the overhead cable from drooping downward.

[0003] The utility model patent with the authorization announcement number CN202871341U discloses a four-core cable. The four-core cable includes a conductor, an insulating layer and an outer sheath. The conductor is covered with an insulating layer. The conductor and the insulating layer are combined into a cable core. There are four cable cores inside the four-core cable. The four cable cores are arranged in parallel in a square. The outer sheath is composed of a polyvinyl chloride layer, a polyester fiber layer and a polyvinyl chloride layer from the inside to the outside. Since the outer sheath is composed of a polyvinyl chloride layer, a polyester fiber layer and a polyvinyl chloride layer, and the polyester fiber has the properties of high strength, high temperature resistance, high toughness and friction resistance.

[0004] Although this technical solution has the advantages of making the cable have better stability, high temperature resistance and friction resistance, when it is used, the center position of the four aluminum cores lacks a corresponding component that can deform and continue to support the four aluminum cores after the aluminum cores are heated and expanded. At this time, when the aluminum cores are heated and expanded, the four aluminum cores will be squeezed against each other. In addition, since there is a protective cover on the outside of the aluminum core, the expansion of the aluminum core will cause the protective cover to expand to a certain extent. The protective cover is prone to aging due to long-term exposure to sunlight. After expansion, it is more likely to crack, affecting the service life. In view of this, we propose a four-core parallel-laid aluminum core overhead cable. Utility Model Content

[0005] The utility model aims to provide a four-core parallel-laid aluminum core overhead cable to solve the defects mentioned in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A four-core parallel-laid aluminum core overhead cable comprises four polyethylene insulating protective sleeves arranged in a matrix, a conductor arranged along the length direction of the polyethylene insulating protective sleeve is arranged at the center position of the polyethylene insulating protective sleeve, a comprehensive protective sleeve is arranged on the outer sleeve of the four polyethylene insulating protective sleeves, a packing layer is arranged between the polyethylene insulating protective sleeve and the comprehensive protective sleeve, a central filling component is arranged at the center position of the four polyethylene insulating protective sleeves, the central filling component is used to support the polyethylene insulating protective sleeve, the central filling component is composed of a plurality of central filling sleeves arranged linearly and equidistantly, an end outer ring sleeve is fixedly installed between two adjacent central filling sleeves, and a plurality of thermal expansion holes arranged in annular shapes and equidistantly are arranged on the end outer ring sleeve.

[0008] Preferably, the number of the thermal expansion holes is four, and the thermal expansion holes are used for thermal expansion protection operation.

[0009] Preferably, the center filling sleeve is fixedly mounted on the inner wall of the end outer ring sleeve, and the outer diameter of the center filling sleeve is smaller than the outer diameter of the end outer ring sleeve, so that the end outer ring sleeve can be slightly deformed toward one side of the center filling sleeve.

[0010] Preferably, the outer sleeve of the comprehensive protective sleeve is provided with an aluminum shielding sleeve, and the aluminum shielding sleeve is used for shielding protection.

[0011] Preferably, the outer sleeve of the aluminum shielding sheath is provided with an inner steel belt armor layer, an inner lining layer is provided between the inner steel belt armor layer and the aluminum shielding sheath, the outer sleeve of the inner steel belt armor layer is provided with an outer steel belt armor layer, and the inner steel belt armor layer and the outer steel belt armor layer are used for anti-bending protection.

[0012] Preferably, the outer sheath of the outer steel belt armor layer is provided with an outer insulating sheath, and the outer insulating sheath is used for insulation protection.

[0013] Preferably, a wear-resistant layer is provided on the surface of the outer insulating sheath, and the wear-resistant layer is used for wear-resistant protection.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides a central filling component that is filled in the central positions of the four polyethylene insulating protective sleeves, which can provide stable support for the central positions of the four polyethylene insulating protective sleeves. In addition, after the polyethylene insulating protective sleeve expands slightly as the conductor is heated, the polyethylene insulating protective sleeve can squeeze the end outer ring sleeve, causing the end outer ring sleeve to shrink and deform to a certain extent, further ensuring that the external protective sleeve is not prone to expansion and cracking, achieving the effect of thermal expansion protection, and helping to extend the service life.

[0016] 2. The utility model can provide insulation, anti-bending and other protective effects by arranging a comprehensive protective cover, an aluminum shielding cover, an inner steel belt armor layer, an outer steel belt armor layer and an outer insulating cover, and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 It is a structural schematic diagram of the central filling component of the utility model.

[0020] The meaning of each number in the figure is:

[0021] 1. Polyethylene insulation protective sheath; 10. Conductor; 11. Comprehensive protective sheath; 111. Filling layer; 12. Aluminum shielding sheath; 13. Inner lining layer; 14. Inner steel belt armor layer; 15. Outer steel belt armor layer; 16. Outer insulation sheath; 161. Wear-resistant layer;

[0022] 2. Center filling assembly; 20. Center filling sleeve; 21. End outer ring sleeve; 211. Thermal expansion hole. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] See also Figure 1-Figure 3 The utility model provides a technical solution: a four-core parallel-laid aluminum core overhead cable, comprising four polyethylene insulating protective sleeves 1 arranged in a matrix, a conductor 10 arranged along the length direction of the polyethylene insulating protective sleeve 1 is arranged at the center of the polyethylene insulating protective sleeve 1, a comprehensive protective sleeve 11 is arranged outside the four polyethylene insulating protective sleeves 1, and a packing layer 111 is arranged between the polyethylene insulating protective sleeve 1 and the comprehensive protective sleeve 11, and the polyethylene insulating protective sleeve 1 can be stably supported by the arranged packing layer 111;

[0025] Specifically, a central filling component 2 is arranged at the center position of the four polyethylene insulating protective sleeves 1. The central filling component 2 is used to support the polyethylene insulating protective sleeve 1. The central filling component 2 is composed of a plurality of central filling sleeves 20 arranged linearly and equidistantly. An end outer ring sleeve 21 is fixedly installed between two adjacent central filling sleeves 20. The end outer ring sleeve 21 is provided with a plurality of thermal expansion holes 211 arranged in an annular shape and equidistantly. The central filling sleeve 20 and the end outer ring sleeve 21 can be made of insulating rubber material. The insulating rubber material has a certain elasticity. When the conductor 10 and the polyethylene insulating protective sleeve 1 are heated and collided, the end outer ring sleeve 21 can be squeezed toward the center position to deform the end outer ring sleeve 21. At this time, the polyethylene insulating protective sleeve 1 will not stretch the outer protective sleeve outward, thereby avoiding the expansion and cracking of the outer protective sleeve.

[0026] In this embodiment, there are four thermal expansion holes 211 , which are used for thermal expansion protection operations so that the end outer ring sleeve 21 can deform toward the thermal expansion holes 211 after deformation occurs.

[0027] Specifically, the central filling sleeve 20 is fixedly mounted on the inner wall of the end outer ring sleeve 21 , and the outer diameter of the central filling sleeve 20 is smaller than that of the end outer ring sleeve 21 , so that the end outer ring sleeve 21 can be slightly deformed toward one side of the central filling sleeve 20 .

[0028] Furthermore, the outer cover of the comprehensive protective cover 11 is provided with an aluminum shielding cover 12, and the aluminum shielding cover 12 is used for shielding protection.

[0029] In addition, the outer sleeve of the aluminum shielding sheath 12 is provided with an inner steel belt armor layer 14, an inner lining layer 13 is provided between the inner steel belt armor layer 14 and the aluminum shielding sheath 12, and the outer sleeve of the inner steel belt armor layer 14 is provided with an outer steel belt armor layer 15. The inner steel belt armor layer 14 and the outer steel belt armor layer 15 are used for anti-bending protection.

[0030] It is worth noting that the outer sheath of the outer steel belt armor layer 15 is provided with an outer insulating sheath 16, and the outer insulating sheath 16 is used for insulation protection.

[0031] It is worth noting that the surface of the outer insulating sheath 16 is provided with a wear-resistant layer 161 . The wear-resistant layer 161 can be made by spraying rubber wear-resistant gravel on the surface of the outer insulating sheath 16 . The wear-resistant layer 161 is used for wear-resistant protection.

[0032] When the four-core parallel-laid aluminum core overhead cable of the utility model is in use, the aluminum shielding sheath 12 can provide shielding protection, the inner steel belt armor layer 14 and the outer steel belt armor layer 15 can provide anti-bending protection, the outer insulating sheath 16 can provide insulation protection, and the wear-resistant layer 161 provides wear-resistant protection. In addition, when the polyethylene insulating protective sheath 1 and the conductor 10 are heated and collided, the polyethylene insulating protective sheath 1 can squeeze the end outer ring sheath 21 toward the inside, so that the polyethylene insulating protective sheath 1 will not expand outward to burst the outer protective sheath, which is beneficial to prolonging the service life and convenient to use.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A four-core parallel-laid aluminum core overhead cable, comprising four polyethylene insulating protective sheaths (1) arranged in a matrix, characterized in that: A conductor (10) is arranged at the center of the polyethylene insulating protective sleeve (1) and is arranged along the length direction of the polyethylene insulating protective sleeve (1). The outer sleeves of the four polyethylene insulating protective sleeves (1) are provided with a comprehensive protective sleeve (11). A filler layer (111) is arranged between the polyethylene insulating protective sleeve (1) and the comprehensive protective sleeve (11). A central filling component (2) is arranged at the center of the four polyethylene insulating protective sleeves (1). The central filling component (2) is used to support the polyethylene insulating protective sleeve (1). The central filling component (2) is composed of a plurality of central filling sleeves (20) arranged linearly and equidistantly. An end outer ring sleeve (21) is fixedly installed between two adjacent central filling sleeves (20). The end outer ring sleeve (21) is provided with a plurality of thermal expansion holes (211) arranged annularly and equidistantly.

2. The four-core parallel-laid aluminum core overhead cable according to claim 1 is characterized in that: The number of the thermal expansion holes (211) is four, and the thermal expansion holes (211) are used for thermal expansion protection operation.

3. The four-core parallel-laid aluminum core overhead cable according to claim 1 is characterized in that: The central filling sleeve (20) is fixedly mounted on the inner wall of the end outer ring sleeve (21), and the outer diameter of the central filling sleeve (20) is smaller than the outer diameter of the end outer ring sleeve (21).

4. The four-core parallel-laid aluminum core overhead cable according to claim 1 is characterized in that: The outer sleeve of the comprehensive protective sleeve (11) is provided with an aluminum shielding sleeve (12), and the aluminum shielding sleeve (12) is used for shielding protection.

5. The four-core parallel-laid aluminum core overhead cable according to claim 4 is characterized in that: The outer sleeve of the aluminum shielding sheath (12) is provided with an inner steel belt armor layer (14), an inner lining layer (13) is provided between the inner steel belt armor layer (14) and the aluminum shielding sheath (12), the outer sleeve of the inner steel belt armor layer (14) is provided with an outer steel belt armor layer (15), and the inner steel belt armor layer (14) and the outer steel belt armor layer (15) are used for anti-bending protection.

6. The four-core parallel-laid aluminum core overhead cable according to claim 5, characterized in that: The outer sheath of the outer steel belt armor layer (15) is provided with an outer insulating sheath (16), and the outer insulating sheath (16) is used for insulation protection.

7. The four-core parallel-laid aluminum core overhead cable according to claim 6 is characterized in that: The surface of the outer insulating sheath (16) is provided with a wear-resistant layer (161), and the wear-resistant layer (161) is used for wear-resistant protection.

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