Anti-theft grounding backflow power cable

Abstract

The utility model provides an anti-theft grounding backflow power cable, which relates to the technical field of power cables and comprises a cable main body, a conductor is arranged in the cable main body, an insulating layer is attached to the outer wall of the conductor, and an anti-theft signal transmission optical unit is attached to the outer wall of the insulating layer. A fixing layer is attached to the outer wall of the anti-theft signal transmission optical unit. The anti-theft signal transmission optical unit, namely the anti-theft signal transmission optical fiber, is arranged, when the cable main body is cut off and stolen, the problem of protection interruption of an ultrahigh-voltage cable line caused by the anti-theft signal transmission optical fiber can be fed back in time, the stolen position can be effectively positioned in time, the waterproof layer is arranged and is made of polyvinyl chloride, and the polyvinyl chloride is a material with high cost performance. The waterproof cable has better mechanical performance, can bear certain external force extrusion and stretching, and can play a waterproof role while protecting the cable main body from external physical damage. And the polyvinyl chloride has flame retardance, so that the safety of the cable main body is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to an anti-theft grounding return power cable. Background Art

[0002] Grounded return power cable consists of conductor, insulation and outer sheath. It is used in ultra-high voltage cable lines with one end of the metal sheath grounded. It can prevent the magnetic field formed by single-phase grounding fault current from seriously affecting the outside world and ensure that the induced voltage in the metal sheath does not exceed the allowable standard.

[0003] In the prior art, such as Chinese patent publication number CN118155929A, a identifiable weather-resistant composite cable for user-end power supply is disclosed, which has a cable core and a sheath layer of a composite structure; the cable core has a main insulating core, multiple neutral cores, multiple signal cores, and multiple grounding cores, the main insulating core has a main insulating layer with a color structure that can be identified according to the working condition setting, and the outside of the main insulating layer is extruded with a main insulating protective layer of a transparent weather-resistant material; the neutral core, signal core, and grounding core are concentrically and sparsely arranged on the periphery of the main insulating core with the main insulating core as the center; the sheath layer has a color structure that can be identified according to the working condition setting, and the outside of the sheath layer is extruded with a sheath protective layer of a transparent weather-resistant material. The present invention enables the formed user-end power supply cable to maintain color identifiability and have excellent weather resistance, is easy to implement, and is economical.

[0004] Although the above-mentioned patent discloses an identifiable weather-resistant composite cable for user-end power supply, which enables the formed user-end power supply cable to maintain color recognizability and have excellent weather resistance, is easy to implement and economical, it cannot provide timely feedback on the problem of ultra-high voltage cable line protection interruption caused by the theft of the grounding cable, and lacks effective positioning after the grounding cable is stolen. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that the protection interruption of the ultra-high voltage cable line caused by the theft of the grounding cable cannot be fed back in time and the problem that the grounding cable cannot be effectively located after being stolen, and to propose an anti-theft grounding return power cable.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: an anti-theft grounded return power cable, including a cable body, a conductor is provided in the cable body, an insulating layer is adhered to the outer wall of the conductor, an anti-theft signal transmission optical unit is adhered to the outer wall of the insulating layer, and a fixing layer is adhered to the outer wall of the anti-theft signal transmission optical unit.

[0007] Preferably, a first protective layer is attached to the outer side of the fixing layer.

[0008] Preferably, a second protective layer is attached to the outer side of the first protective layer.

[0009] Preferably, a flame retardant layer is provided inside the first protective layer, and a waterproof layer is attached to the outer wall of the flame retardant layer.

[0010] Preferably, an insect-proof layer is provided inside the second protective layer, and an outer protective layer is attached to the outer wall of the insect-proof layer.

[0011] Preferably, the inner wall of the flame retardant layer is in contact with the fixing layer.

[0012] Preferably, the inner wall of the insect-proof layer is in contact with the waterproof layer.

[0013] Preferably, the thickness of the waterproof layer is 1 to 3 mm.

[0014] Preferably, the thickness of the flame retardant layer is 1 to 2.5 mm.

[0015] Preferably, the thickness of the insect-proof layer is 1 to 1.5 mm.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] The present invention includes an optical unit for transmitting an anti-theft signal, namely, an optical fiber for transmitting an anti-theft signal. If the cable body is cut or stolen, it can provide timely feedback on the resulting interruption in the ultra-high voltage cable line protection, allowing for the timely and effective location of the theft. The waterproof layer is made of polyvinyl chloride (PVC), a cost-effective material. It has excellent mechanical properties and can withstand certain external forces, such as compression and stretching. While protecting the cable body from physical damage, it also acts as a waterproof barrier. PVC is flame-retardant, which improves the safety of the cable body to a certain extent. However, it may release hydrogen chloride gas at high temperatures and has relatively poor aging resistance. The flame-retardant layer is made of cross-linked polyethylene (XLPE), a material obtained through a cross-linking reaction of polyethylene. Cross-linked polyethylene has excellent electrical and mechanical properties and also has a certain degree of flame retardancy. During the cross-linking process, the molecular structure of the polyethylene changes, forming a three-dimensional network structure, which improves the material's heat resistance and flame retardancy. The insect-proof layer is made of aluminum foil, which has excellent barrier properties, preventing insects from penetrating the foil layer. It also has good reflectivity, capable of reflecting some external interference signals, thus improving the cable's anti-interference capabilities to a certain extent. Furthermore, aluminum foil has good conductivity, which helps maintain the electrical performance of the ground return power cable. Furthermore, aluminum foil is thin, so the added weight on the cable is limited, which does not cause significant difficulties in laying and transporting the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the anti-theft grounded return power cable proposed in the utility model;

[0019] Figure 2 This is a front cross-sectional view of the anti-theft grounded return power cable proposed in the utility model;

[0020] Figure 3 The utility model provides a cross-sectional view of the anti-theft grounding return power cable.

[0021] Legend: 1. Conductor; 2. Insulation layer; 3. Anti-theft signal transmission optical unit; 4. Fixing layer; 5. First protective layer; 6. Second protective layer; 7. Flame retardant layer; 8. Waterproof layer; 9. Insect-proof layer; 10. Outer sheath; 11. Cable body. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0023] 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 disclosed in the following specification.

[0024] Example 1, as Figure 1-3 As shown, the utility model provides an anti-theft grounded return power cable, including a cable body 11, a conductor 1 is provided in the cable body 11, an insulating layer 2 is adhered to the outer wall of the conductor 1, an anti-theft signal transmission optical unit 3 is adhered to the outer wall of the insulating layer 2, and a fixing layer 4 is adhered to the outer wall of the anti-theft signal transmission optical unit 3.

[0025] The effect achieved by the entire embodiment 1 is that, by providing an anti-theft signal transmission optical unit 3, i.e., an anti-theft signal transmission optical fiber, when the cable body 11 is cut and stolen, the resulting ultra-high voltage cable line protection interruption problem can be promptly fed back, and the stolen location can be located promptly and effectively.

[0026] Example 2, as Figure 1-3As shown, the outer side of the fixed layer 4 is adhered to the first protective layer 5, the outer side of the first protective layer 5 is adhered to the second protective layer 6, a flame retardant layer 7 is provided inside the first protective layer 5, the outer wall of the flame retardant layer 7 is adhered to the waterproof layer 8, an insect-proof layer 9 is provided inside the second protective layer 6, the outer wall of the insect-proof layer 9 is adhered to the outer protective layer 10, the inner wall of the flame retardant layer 7 is adhered to the fixed layer 4, the inner wall of the insect-proof layer 9 is adhered to the waterproof layer 8, the thickness of the waterproof layer 8 is 1 to 3 mm, the thickness of the flame retardant layer 7 is 1 to 2.5 mm, and the thickness of the insect-proof layer 9 is 1 to 1.5 mm.

[0027] The effects achieved by the entire embodiment 2 are as follows: by providing the waterproof layer 8, and using polyvinyl chloride (PVC), a cost-effective material, PVC has good mechanical properties and can withstand certain external forces and stretching. While protecting the cable body 11 from external physical damage, it also acts as a waterproof material. PVC is flame-retardant, which improves the safety of the cable body 11 to a certain extent. However, it may release hydrogen chloride gas in high-temperature environments and has relatively poor aging resistance. By providing the flame-retardant layer 7, and using cross-linked polyethylene (cross-linked polyethylene), a material obtained by cross-linking polyethylene, PVC has good electrical and mechanical properties and also has a certain degree of flame retardancy. During the cross-linking process, the molecular structure of polyethylene changes, forming a three-dimensional network structure, which improves the material's heat resistance and flame retardancy. By providing the insect-proof layer 9, and using aluminum foil, which has excellent barrier properties, insects cannot penetrate the aluminum foil layer. PVC also has good reflectivity, which can reflect some external interference signals, thereby improving the anti-interference ability of the cable body 11 to a certain extent. In addition, aluminum foil has good conductivity, which helps maintain the electrical performance of the cable body 11 for ground return power cables. Aluminum foil is thin in texture and adds limited weight to the cable body 11, which does not cause much difficulty in laying and transporting the cable body 11.

[0028] Working principle: When the device is in use, it is provided with an anti-theft signal transmission optical unit 3, i.e., an anti-theft signal transmission optical fiber. When the cable body 11 is cut and stolen, it can promptly feedback the problem of ultra-high voltage cable line protection interruption caused by this, and promptly and effectively locate the stolen location. By setting a waterproof layer 8, and the waterproof layer 8 is made of polyvinyl chloride, polyvinyl chloride is a cost-effective material. It has good mechanical properties and can withstand certain external force compression and stretching. While protecting the cable body 11 from external physical damage, it can also play a waterproof role. Polyvinyl chloride is flame retardant, which improves the safety of the cable body 11 to a certain extent. However, it may release hydrogen chloride gas in a high temperature environment, and its aging resistance is relatively weak. By setting a flame retardant layer 7, and the flame retardant layer 7 is made of cross-linked polyethylene, and cross-linked polyethylene is a material obtained by the cross-linking reaction of polyethylene. It has good electrical and mechanical properties, and also has certain flame retardant capabilities. During the cross-linking process, the molecular structure of polyethylene changes, forming a three-dimensional mesh structure, which improves the material's heat resistance and flame retardancy. The provision of insect-proof layer 9, made of aluminum foil with excellent barrier properties, prevents insects from passing through the foil layer. It also has good reflectivity, capable of reflecting some external interference signals, thereby improving the cable body's 11 anti-interference capabilities to a certain extent. Furthermore, aluminum foil has excellent electrical conductivity, which helps maintain the electrical performance of the cable body 11 for grounded return power cables. Furthermore, aluminum foil is thin, adding limited weight to the cable body 11, which does not pose significant difficulties in laying and transporting the cable body 11.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. 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 for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An anti-theft ground return power cable, comprising a cable body (11), characterized in that: A conductor (1) is provided in the cable body (11), an insulating layer (2) is adhered to the outer wall of the conductor (1), an anti-theft signal transmission optical unit (3) is adhered to the outer wall of the insulating layer (2), and a fixing layer (4) is adhered to the outer wall of the anti-theft signal transmission optical unit (3).

2. The anti-theft ground return power cable according to claim 1, characterized in that: A first protective layer (5) is attached to the outer side of the fixing layer (4).

3. The anti-theft ground return power cable according to claim 2, characterized in that: A second protective layer (6) is attached to the outer side of the first protective layer (5).

4. The anti-theft ground return power cable according to claim 2, characterized in that: A flame retardant layer (7) is provided inside the first protective layer (5), and a waterproof layer (8) is attached to the outer wall of the flame retardant layer (7).

5. The anti-theft ground return power cable according to claim 3, characterized in that: An insect-proof layer (9) is provided inside the second protective layer (6), and an outer protective layer (10) is attached to the outer wall of the insect-proof layer (9).

6. The anti-theft ground return power cable according to claim 4, characterized in that: The inner wall of the flame retardant layer (7) is in contact with the fixing layer (4).

7. The anti-theft ground return power cable according to claim 5, characterized in that: The inner wall of the insect-proof layer (9) is in contact with the waterproof layer (8).

8. The anti-theft grounded return power cable according to claim 4, characterized in that: The thickness of the waterproof layer (8) is 1 to 3 mm.

9. The anti-theft grounded return power cable according to claim 4, characterized in that: The thickness of the flame retardant layer (7) is 1 to 2.5 mm.

10. The anti-theft grounded return power cable according to claim 5, characterized in that: The thickness of the insect-proof layer (9) is 1 to 1.5 mm.

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