Corrosion-resistant tensile aerial cable

Abstract

The utility model discloses a corrosion-resistant tensile aerial cable, which comprises at least three groups of wire cores, the wire cores are twisted with one another, an outer insulating layer is arranged outside the wire cores, a shielding layer is wrapped outside the outer insulating layer, a composite armor layer is arranged outside the shielding layer, and the composite armor layer is wrapped outside the outer insulating layer. The composite armor layer is composed of a base layer, a reinforcing layer and a reinforcing layer, the composite armor layer is wrapped with a composite corrosion-resistant layer, and the composite corrosion-resistant layer is composed of an anti-corrosion inner layer, a strengthening layer and an anti-corrosion outer layer; according to the scheme, the problem that the external structure of the aerial cable is easy to corrode in a severe environment, so that the internal strengthening structure is influenced is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of overhead cables, in particular to a corrosion-resistant and tensile-resistant overhead cable. Background Technique

[0002] An overhead cable is an overhead conductor equipped with an insulating layer and a protective outer sheath. According to different structures, it can be divided into hard aluminum wire structure, hard drawn copper wire structure, aluminum alloy wire structure, steel core or aluminum alloy core support structure, and self-supporting three-core stranded structure, etc. The outer layer of the conductor is covered with a high-strength insulating material, which is one of the core characteristics of overhead cables and can effectively prevent electric leakage and short circuits. In busy streets and narrow lanes, the hanging method and flexible erection of overhead cables can effectively solve the problem of difficult construction of underground cables.

[0003] For example, the Chinese authorized patent "An Overhead Cable" with the publication number CN212907177U includes: a carbon fiber core, an inner buffer layer is coated on the outside of the carbon fiber core, multiple round conductive aluminum conductors are stranded on the outside of the inner buffer layer, and the multiple round conductive aluminum conductors form a first conductive core in a ring structure. Multiple sector-shaped conductive aluminum conductors are arranged outside the round conductive aluminum conductors, and the multiple sector-shaped conductive aluminum conductors form a second conductive core in a ring structure. An insulating layer, a fiber braided layer, an outer buffer layer, and an outer sheath are sequentially coated on the outside of the sector-shaped conductive aluminum conductors.

[0004] Although the above-mentioned prior art realizes the protection of the cable, considering its use in harsh environments, it is easy to corrode the external structure of the cable, thereby affecting the structural stability of the protection structure, and further affecting the internal strengthening structure, resulting in a reduction in the overall service life of the overhead cable. Therefore, it does not meet the existing requirements, and for this reason, we propose a corrosion-resistant and tensile-resistant overhead cable. Content of the Utility Model

[0005] The purpose of the utility model is to provide a corrosion-resistant and tensile-resistant overhead cable to solve the problem that the external structure of the overhead cable is prone to corrosion in harsh environments, thereby affecting the internal strengthening structure as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a corrosion-resistant and tensile-resistant overhead cable, including a wire core, at least three groups of wire cores are provided, and the wire cores are stranded with each other. An outer insulating layer is arranged outside the wire core, a shielding layer is wrapped outside the outer insulating layer, a composite armor layer is arranged outside the shielding layer, the composite armor layer is composed of a base layer, a strengthening layer, and a reinforcement layer, a composite corrosion-resistant layer is wrapped outside the composite armor layer, and the composite corrosion-resistant layer is composed of an anti-corrosion inner layer, a strengthening layer, and an anti-corrosion outer layer.

[0007] Preferably, the wire core includes an inner insulating layer, a conductor is provided inside the inner insulating layer, the conductor is formed by stranding a plurality of galvanized steel strands, and the inner insulating layer is wrapped around the outside of the conductor by an extrusion equipment.

[0008] Preferably, a filler is provided in the gap between the inner insulating layer and the wire core, and the wire core, the inner insulating layer and the filler constitute the cable core of the overhead cable.

[0009] Preferably, the base layer is fixed on the cable core by means of spiral winding, the strengthening layer is wrapped around the outside of the base layer in a laminating manner, and the reinforcing layer is fixed on the strengthening layer by means of longitudinal laying.

[0010] Preferably, the anti-corrosion inner layer is fixed on the outside of the composite armor layer by an extrusion equipment, the strengthening layer is woven in a net shape on the outside of the anti-corrosion inner layer, and the anti-corrosion outer layer is fixed on the outside of the strengthening layer by an extrusion equipment.

[0011] Preferably, both the inner insulating layer and the outer insulating layer are made of cross-linked polyethylene.

[0012] Preferably, the shielding layer is made of aluminum foil.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By providing a composite armor layer, the combined action of the multi-layer structure and the selected materials of the composite armor layer significantly improves the tensile strength of the cable, enabling it to operate stably in harsh environments; the corrosion-resistant materials of the inner base layer and the outer reinforcing layer can effectively resist the corrosive media in the external environment and extend the service life of the cable; the high-strength fiber material used in the middle layer has the characteristic of light weight, which helps to reduce the overall weight of the cable and facilitates construction and installation; the electrical conductivity and heat conductivity of the outer reinforcing layer can improve the electrical performance of the cable to a certain extent and ensure the stable transmission of signals or currents.

[0015] 2. By providing a composite corrosion-resistant layer, the composite corrosion-resistant outer sheath with a multi-layer structure and excellent materials can effectively isolate the corrosive substances in the external environment, protect the inside of the cable from erosion, significantly improve the corrosion resistance of the cable, and the addition of the strengthening layer significantly improves the mechanical strength of the composite corrosion-resistant outer sheath, enabling it to resist damage caused by external forces and extend the service life of the cable. The good corrosion resistance and mechanical strength ensure the safe and stable operation of the cable in harsh environments and reduce the risks of failures and accidents caused by corrosion and mechanical damage.

[0016] 3. The conductor of the present utility model adopts a galvanized steel strand structure coated with anti-corrosion ointment. The galvanized steel strand not only has a large tensile strength but also provides anti-corrosion protection through the galvanized layer. At the same time, the ointment coating further enhances its corrosion resistance. The galvanized steel strand structure can not only ensure the mechanical strength of the cable but also provide double anti-corrosion protection through galvanizing and the ointment coating, extending the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a front view of the present utility model;

[0019] Figure 3 is a cross-sectional view of the internal structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the composite armor layer structure of the present utility model;

[0021] Figure 5 is a schematic diagram of the composite corrosion-resistant layer structure of the present utility model.

[0022] In the figure: 1, conductor core; 11, inner insulation layer; 12, conductor; 2, outer insulation layer; 3, shielding layer; 4, composite armor layer; 41, base layer; 42, reinforcement layer; 43, reinforcement layer; 5, composite corrosion-resistant layer; 51, inner anti-corrosion layer; 52, strengthening layer; 53, outer anti-corrosion layer; 6, filler. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Please refer to Figures 1-5 , an embodiment provided by the present utility model: a corrosion-resistant and tensile overhead cable, including a conductor core 1. There are at least three groups of conductor cores 1, and the conductor cores 1 are twisted with each other. An outer insulation layer 2 is arranged outside the conductor core 1, and a shielding layer 3 is wrapped outside the outer insulation layer 2. The shielding layer 3 is made of aluminum foil. A composite armor layer 4 is arranged outside the shielding layer 3. The composite armor layer 4 is composed of a base layer 41, a reinforcement layer 42, and a reinforcement layer 43. A composite corrosion-resistant layer 5 is wrapped outside the composite armor layer 4. The composite corrosion-resistant layer 5 is composed of an inner anti-corrosion layer 51, a strengthening layer 52, and an outer anti-corrosion layer 53.

[0025] The multi-layer structure and selected materials of the composite armor layer 4 work together to significantly enhance the tensile strength of the cable, enabling it to operate stably in harsh environments. The multi-layer structure and excellent material of the composite corrosion-resistant layer 5, along with the composite corrosion-resistant outer sheath, can effectively isolate corrosive substances in the external environment, protect the interior of the cable from erosion, and significantly improve the corrosion resistance of the cable.

[0026] Please refer to Figure 3 , the core 1 includes an inner insulation layer 11. Inside the inner insulation layer 11, there is a conductor 12, and the conductor 12 is composed of multiple galvanized steel strands stranded together. The inner insulation layer 11 is wrapped around the outside of the conductor 12 through an extrusion device. Both the inner insulation layer 11 and the outer insulation layer 2 are made of cross-linked polyethylene. The conductor adopts a structure of galvanized steel strands coated with anti-corrosion grease. The galvanized steel strands not only have a large tensile strength but also provide anti-corrosion protection through the galvanized layer. At the same time, the grease coating further enhances its corrosion resistance. The structure of galvanized steel strands can not only ensure the mechanical strength of the cable but also provide double anti-corrosion protection through galvanizing and grease coating, extending the service life of the cable. Cross-linked polyethylene is used to isolate the current and ensure the electrical performance of the cable. For corrosion resistance requirements, the insulation layer material should have good electrical performance, chemical corrosion resistance, and heat resistance, which can effectively prevent current leakage and short circuits, and at the same time have good chemical corrosion resistance to ensure the stable operation of the cable in harsh environments.

[0027] Please refer to Figure 3 , there is a filler 6 at the gap between the inner insulation layer 11 and the core 1. The core 1, the inner insulation layer 11, and the filler 6 form the core of the aerial cable. The filling layer is an asbestos rope, which can tightly fill between the cable cores, forming a barrier to effectively protect the cable cores from the influence of external physical impacts, mechanical flexures, and other factors.

[0028] Please refer to Figure 1 and Figure 4 , the base layer 41 is fixed on the shielding layer by means of spiral winding. The strengthening layer 42 is wrapped around the outside of the base layer 41 by means of lamination. The reinforcement layer 43 is fixed on the strengthening layer 42 by means of longitudinal laying. The base layer 41 is made of stainless steel wire and is fixed on the core by means of spiral winding to ensure a tight combination with the core. It not only has excellent tensile strength but also has high strength and corrosion resistance, and can effectively resist external mechanical damage and corrosion. The strengthening layer 42 is made of aramid fiber and is wrapped around the outside of the armor base layer by means of lamination. It has the characteristics of light weight and high strength, and can effectively improve the overall tensile strength of the cable. The reinforcement layer 43 is made of aluminum alloy strip and is fixed on the strengthening layer by means of longitudinal laying. It is not only corrosion-resistant and wear-resistant but also has good electrical conductivity and thermal conductivity, and can improve the electrical performance of the cable to a certain extent.

[0029] Please refer to Figure 5, the anti-corrosion inner layer 51 is fixed to the outside of the composite armor layer 4 through an extrusion device. The reinforcement layer 52 is woven in a net shape outside the anti-corrosion inner layer 51. The anti-corrosion outer layer 53 is fixed to the outside of the reinforcement layer 52 through an extrusion device. The anti-corrosion inner layer 51 is made of polytetrafluoroethylene, which has extremely strong corrosion resistance and can resist the erosion of various chemical substances. As the first line of defense, it directly isolates the corrosive substances in the external environment and protects the inside of the cable from erosion. The reinforcement layer 52 is made of glass fiber, which enhances the mechanical strength of the composite corrosion-resistant outer sheath, prevents the outer sheath from being damaged due to external forces, and at the same time helps to improve the overall corrosion resistance. The anti-corrosion outer layer 53 is made of polyurethane, which further blocks the corrosive substances in the external environment and provides additional physical and chemical protection to ensure the long-term stable operation of the cable.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. 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 regarded as limiting the claimed rights.

Claims

1. A corrosion-resistant and tensile overhead cable, comprising a wire core (1), characterized in that: The wire cores (1) are provided with at least three groups, and the wire cores (1) are twisted with each other. An outer insulating layer (2) is arranged outside the wire cores (1). A shielding layer (3) is wrapped outside the outer insulating layer (2). A composite armor layer (4) is arranged outside the shielding layer (3). The composite armor layer (4) is composed of a base layer (41), a strengthening layer (42) and a reinforcing layer (43). A composite corrosion-resistant layer (5) is wrapped outside the composite armor layer (4). The composite corrosion-resistant layer (5) is composed of an anti-corrosion inner layer (51), a strengthening layer (52) and an anti-corrosion outer layer (53).

2. The corrosion-resistant and tensile overhead cable according to claim 1, characterized in that: The wire core (1) includes an inner insulating layer (11). A conductor (12) is arranged inside the inner insulating layer (11). The conductor (12) is composed of a plurality of galvanized steel strands twisted together. The inner insulating layer (11) is wrapped outside the conductor (12) by an extrusion equipment.

3. The corrosion-resistant and tensile overhead cable according to claim 2, wherein: A filler (6) is arranged at the gap between the inner insulating layer (11) and the wire core (1). The wire core (1), the inner insulating layer (11) and the filler (6) form the core of the aerial cable.

4. The corrosion-resistant and tensile overhead cable according to claim 3, characterized in that: The base layer (41) is fixed on the core by a spiral winding method. The strengthening layer (42) is wrapped outside the base layer (41) in a laminating manner. The reinforcing layer (43) is fixed on the strengthening layer (42) by a longitudinal laying method.

5. A corrosion-resistant and tensile overhead cable according to claim 1, characterized in that: The anti-corrosion inner layer (51) is fixed outside the composite armor layer (4) by an extrusion equipment. The strengthening layer (52) is woven in a net shape outside the anti-corrosion inner layer (51). The anti-corrosion outer layer (53) is fixed outside the strengthening layer (52) by an extrusion equipment.

6. The corrosion-resistant and tensile overhead cable according to claim 2, characterized in that: Both the inner insulating layer (11) and the outer insulating layer (2) are made of cross-linked polyethylene material.

7. The corrosion-resistant and tensile overhead cable according to claim 1, wherein: The shielding layer (3) is made of aluminum foil material.

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