Environment-friendly rat and termite prevention special medium voltage cable

Abstract

The utility model discloses an environmental protection type special medium voltage cable of preventing rat and termite belongs to power cable technical field, including special-shaped conductor, the outside of special-shaped conductor is wrapped with insulating wire core layer, the outside of insulating wire core layer is wound and is wrapped with annealing soft copper band layer, the protective sheath includes internal protective layer, nylon protective layer and outer protective layer, internal protective layer, nylon protective layer and outer protective layer adopt the mode of three -layer co -extrusion and extrude, the utility model makes the cable also can play the effect of protection internal structure, prevent damp, enhance the wear resistance and the tear resistance effect and the performance of resistance to the physical damage of outside under the premise of not increasing manufacturing outer diameter and self weight, is favorable to avoid the damage of rat and termite bite, ensures the long -term stable operation of cable, then realizes the rat and termite protection of cable, prolongs the service life of cable's technical effect.

Description

Technical Field

[0001] This utility model belongs to the field of power cable technology, and in particular relates to an environmentally friendly, rodent-proof and ant-proof medium-voltage cable. Background Technology

[0002] In power systems, medium-voltage cables are widely used in urban power grids, rural power grids, and industrial sectors. However, in environments such as the wild, farmland, and basements, cables are often damaged by rats and ants. Rats gnaw on the cable sheath to wear down their teeth, causing damage to the cable insulation layer, which can lead to short circuits, leakage, or even fires. Ants can also erode the cable sheath, especially in underground cables, where ant nests may be built directly near the cable, causing damage. Traditional rodent- and ant-proof cables often use chemical repellents (such as capsaicin) or physical protective sheaths (such as armor). However, chemical repellents can pollute the environment, and their effectiveness gradually diminishes over time. Physical protective sheaths (such as steel wire armor) increase the weight and cost of the cable and are detrimental to its flexibility and ease of installation.

[0003] With increasing environmental awareness, the power industry has placed higher demands on the environmental performance of cables. The chemical repellents used in traditional rodent- and termite-proof cables may have a negative impact on the ecological environment. Therefore, there is an urgent need for an environmentally friendly rodent- and termite-proof cable that can effectively prevent animal damage and conform to the concept of green environmental protection. Utility Model Content

[0004] To address the problems of existing technologies, this utility model provides an environmentally friendly medium-voltage cable specifically designed for rodent and ant prevention. This cable, without increasing its outer diameter or weight, effectively protects its internal structure, prevents moisture damage, enhances abrasion and tear resistance, and resists external physical damage. It helps prevent damage caused by rodent and ant bites, ensuring long-term stable operation and thus providing rodent and ant protection, extending the cable's lifespan. This solves the problems of existing rodent and ant prevention cables, which use chemical repellents that negatively impact the environment, and where physical protective sleeves (such as steel wire armor) increase weight and cost, while compromising flexibility and portability.

[0005] This utility model is implemented as follows: an environmentally friendly, rodent- and ant-proof medium-voltage cable includes an irregularly shaped conductor, an insulated core layer wrapped around the irregularly shaped conductor, an annealed soft copper strip layer wrapped around the insulated core layer, a T-shaped corrugated filler strip around the annealed soft copper strip layer, and a protective sleeve wrapped around the T-shaped corrugated filler strip. The insulated core layer includes an inner shielding layer, an insulation layer, and an outer shielding layer, which are extruded using a three-layer co-extrusion method. The protective sleeve includes an inner protective layer, a nylon protective layer, and an outer protective layer, which are also extruded using a three-layer co-extrusion method.

[0006] With this design, the inner protective layer, nylon protective layer, and outer protective layer are extruded in one step using a three-layer co-extrusion method. Nylon polymer material is extruded between the two sheaths, which allows the cable to protect its internal structure, prevent moisture, enhance abrasion resistance and tear resistance, and resist external physical damage without increasing the manufacturing outer diameter and its own weight. This helps to avoid damage caused by rodents and ants, ensures the long-term stable operation of the cable, and thus achieves rodent and ant protection for the cable, extending its service life.

[0007] As a preferred embodiment of this invention, the irregularly shaped conductor adopts an irregularly shaped compaction structure.

[0008] This design allows for a reduction in the conductor's outer diameter and weight, which in turn helps to reduce the weight of the cable. It also increases surface compactness, reduces resistance, and minimizes energy loss.

[0009] In a preferred embodiment of this invention, the inner shielding layer is tightly wrapped and in contact with the irregularly shaped conductor, and the outer shielding layer is tightly wrapped around the outside of the insulating layer. Both the inner and outer shielding layers are made of low-density polyethylene material, and the insulating layer is made of cross-linked polyethylene material.

[0010] This design allows for a more uniform electric field distribution, improves cable insulation performance, reduces the possibility of partial discharge, thus ensuring the electrical safety of the cable. It is also lightweight, water-resistant, does not easily decompose to produce harmful substances, has excellent environmental performance, is resistant to rodent and ant bites, and enhances protective performance.

[0011] As a preferred embodiment of this invention, the annealed soft copper strip layer is wrapped around the outer shielding layer in an overlapping manner, and the overlap rate of the annealed soft copper strip layer is uniformly controlled at 10%-15%.

[0012] This design effectively shields the internal structure, reduces electromagnetic interference, and protects it from mechanical damage.

[0013] As a preferred embodiment of this utility model, the thickness of the inner protective layer is not less than 1.1 mm, the thickness of the outer protective layer is not less than 1.2 mm, and the thickness of the nylon protective layer is 0.2 mm-0.4 mm. The inner protective layer, the nylon protective layer, and the outer protective layer are all made of custom transparent nylon 12P.

[0014] This setup utilizes custom-designed transparent nylon 12P, which boasts 50% higher strength and 30% higher hardness than conventional nylon 12. Its melting temperature is close to that of PE material, and co-extrusion further enhances material stability, improves the cable's abrasion resistance and tear resistance, and enhances its resistance to external physical damage, thereby improving its rodent and ant protection.

[0015] As a preferred embodiment of this invention, the T-shaped corrugated filler strip fills the gaps around the annealed soft copper strip layer.

[0016] This setup allows the T-shaped corrugated filler strip to be selected according to the calculated outer diameter of the conductor during the cabling process. It fills the gaps around the annealed soft copper tape layer, which helps ensure the roundness of the finished cable, makes the structure of each layer more tightly and stably bonded, and also plays a certain role in buffering and protection, enhancing the cable's wear resistance and durability.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: The irregularly shaped conductor made by the irregular compression structure, the inner shielding layer, insulation layer, and outer shielding layer extruded in one step through a three-layer co-extrusion process, the inner protective layer, nylon protective layer, and outer protective layer extruded in one step through a three-layer co-extrusion process, the extrusion of nylon polymer material between the two sheaths, and the use of annealed soft copper strip layer and T-shaped corrugated filler strips, all enable the cable to protect its internal structure, prevent moisture, enhance wear resistance and tear resistance, and resist external physical damage without increasing the manufacturing outer diameter and its own weight. This helps to avoid damage caused by rodent and ant bites, ensures the long-term stable operation of the cable, and thus achieves rodent and ant protection for the cable, extending its service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the insulated wire core layer structure provided in an embodiment of the present invention.

[0020] In the diagram: 1. Irregularly shaped conductor; 2. Insulated core layer; 201. Inner shielding layer; 202. Insulation layer; 203. Outer shielding layer; 3. Annealed soft copper strip layer; 4. T-shaped corrugated filler strip; 5. Protective sleeve; 501. Inner protective layer; 502. Nylon protective layer; 503. Outer protective layer. Detailed Implementation

[0021] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0022] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] refer to Figures 1 to 2 As shown in the figure, the environmentally friendly rodent-proof and ant-proof medium-voltage cable provided in this embodiment of the utility model includes a shaped conductor 1, an insulated core layer 2 wrapped around the shaped conductor 1, an annealed soft copper strip layer 3 wrapped around the insulated core layer 2, a T-shaped corrugated filler strip 4 filling the annealed soft copper strip layer 3, and a protective sleeve 5 wrapped around the T-shaped corrugated filler strip 4. The insulated core layer 2 includes an inner shielding layer 201, an insulation layer 202, and an outer shielding layer 203. The inner shielding layer 201, the insulation layer 202, and the outer shielding layer 203 are extruded by a three-layer co-extrusion method. The protective sleeve 5 includes an inner protective layer 501, a nylon protective layer 502, and an outer protective layer 503. The inner protective layer 501, the nylon protective layer 502, and the outer protective layer 503 are extruded by a three-layer co-extrusion method.

[0024] Using the above scheme, the inner protective layer 501, the nylon protective layer 502, and the outer protective layer 503 are extruded in one step using a three-layer co-extrusion method. Nylon polymer material is extruded between the two sheaths, so that the cable can protect the internal structure, prevent moisture, enhance wear resistance and tear resistance, and resist external physical damage without increasing the manufacturing outer diameter and its own weight. This helps to avoid damage caused by rodents and ants, ensures the long-term stable operation of the cable, and thus achieves rodent and ant protection for the cable, extending the cable's service life.

[0025] Specifically, the irregularly shaped conductor 1 adopts an irregularly shaped compaction structure.

[0026] By adopting the above scheme, the outer diameter of the conductor can be reduced, the weight of the conductor can be reduced, which in turn helps to reduce the weight of the cable. At the same time, the surface compaction can be increased, the resistance can be reduced, and the energy loss can be reduced.

[0027] Specifically, the inner shielding layer 201 is in close contact with the irregularly shaped conductor 1, and the outer shielding layer 203 is tightly wrapped around the outside of the insulating layer 202. Both the inner shielding layer 201 and the outer shielding layer 203 are made of low-density polyethylene material, and the insulating layer 202 is made of cross-linked polyethylene material.

[0028] By adopting the above scheme, the electric field distribution can be made more uniform, the insulation performance of the cable can be improved, the possibility of partial discharge can be reduced, thereby ensuring the electrical safety of the cable. It is also lightweight, water-resistant, does not easily decompose to produce harmful substances, has excellent environmental performance, is resistant to rodent and ant bites, and enhances protective performance.

[0029] Specifically, the annealed soft copper strip layer 3 is wrapped around the outer shielding layer 203 in an overlapping manner, and the overlap rate of the annealed soft copper strip layer 3 is uniformly controlled at 10%-15%.

[0030] The above solution can effectively shield the structure, reduce electromagnetic interference, and protect the internal structure from mechanical damage.

[0031] Specifically, the thickness of the inner protective layer 501 is not less than 1.1 mm, the thickness of the outer protective layer 503 is not less than 1.2 mm, and the thickness of the nylon protective layer 502 is 0.2 mm-0.4 mm. The inner protective layer 501, the nylon protective layer 502 and the outer protective layer 503 are all made of custom transparent nylon 12P.

[0032] The above solution uses customized transparent nylon 12P, which has 50% higher strength and 30% higher hardness than conventional nylon 12. Its melting temperature is close to that of PE material, and co-extrusion is more conducive to material stability, enhancing the cable's abrasion resistance, tear resistance, and resistance to external physical damage, thereby enhancing its rodent and ant protection performance.

[0033] Specifically, the T-shaped corrugated filler strip 4 fills the gaps around the annealed soft copper strip layer 3.

[0034] Using the above scheme, the T-shaped corrugated filler strip 4 is selected according to the outer diameter of the wire core during the cabling process. It is filled in the gaps around the annealed soft copper tape layer 3, which helps to ensure the roundness of the finished cable, makes the structure of each layer more tightly and stably bonded, and also plays a certain role in buffering and protection, enhancing the wear resistance and durability of the cable.

[0035] The working principle of this utility model:

[0036] In use, the irregularly shaped conductor 1, made by an irregularly shaped compression structure, is extruded in one step through a three-layer co-extrusion process. The inner shielding layer 201, insulation layer 202, and outer shielding layer 203 are extruded in one step through a three-layer co-extrusion process. The inner protective layer 501, nylon protective layer 502, and outer protective layer 503 are also extruded in one step through a three-layer co-extrusion process. Nylon polymer material is extruded between the two sheaths. In addition, an annealed soft copper tape layer 3 and a T-shaped corrugated filler strip 4 are used. This allows the cable to protect the internal structure, prevent moisture, enhance wear resistance and tear resistance, and resist external physical damage without increasing the manufacturing outer diameter and its own weight. It also helps to avoid damage caused by rodents and ants, ensuring the long-term stable operation of the cable. This achieves rodent and ant protection for the cable and extends its service life.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly, rodent- and ant-proof medium-voltage cable, comprising an irregularly shaped conductor (1), characterized in that: The shaped conductor (1) is wrapped with an insulating core layer (2), and the insulating core layer (2) is wrapped with an annealed soft copper strip layer (3). The annealed soft copper strip layer (3) is surrounded by a T-shaped corrugated filler strip (4). The T-shaped corrugated filler strip (4) is wrapped with a protective sleeve (5). The insulating core layer (2) includes an inner shielding layer (201), an insulating layer (202), and an outer shielding layer (203). The inner shielding layer (201), the insulating layer (202), and the outer shielding layer (203) are extruded by a three-layer co-extrusion method. The protective sleeve (5) includes an inner protective layer (501), a nylon protective layer (502), and an outer protective layer (503). The inner protective layer (501), the nylon protective layer (502), and the outer protective layer (503) are extruded by a three-layer co-extrusion method.

2. The environmentally friendly rodent- and ant-proof medium-voltage cable as described in claim 1, characterized in that: The irregularly shaped conductor (1) adopts an irregularly shaped compaction structure.

3. The environmentally friendly rodent- and ant-proof medium-voltage cable as described in claim 1, characterized in that: The inner shielding layer (201) is in close contact with the irregular conductor (1), and the outer shielding layer (203) is tightly wrapped around the outside of the insulating layer (202). Both the inner shielding layer (201) and the outer shielding layer (203) are made of low-density polyethylene material, and the insulating layer (202) is made of cross-linked polyethylene material.

4. The environmentally friendly rodent- and ant-proof medium-voltage cable as described in claim 1, characterized in that: The annealed soft copper strip layer (3) is wrapped around the outer shielding layer (203) in an overlapping manner, and the overlap rate of the annealed soft copper strip layer (3) is uniformly controlled at 10%-15%.

5. The environmentally friendly rodent- and ant-proof medium-voltage cable as described in claim 1, characterized in that: The thickness of the inner protective layer (501) is not less than 1.1 mm, the thickness of the outer protective layer (503) is not less than 1.2 mm, and the thickness of the nylon protective layer (502) is 0.2 mm-0.4 mm. The inner protective layer (501), the nylon protective layer (502) and the outer protective layer (503) are all made of custom transparent nylon 12P.

6. The environmentally friendly rodent- and ant-proof medium-voltage cable as described in claim 1, characterized in that: The T-shaped corrugated filler strip (4) fills the gaps around the annealed soft copper strip layer (3).

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