Grounding copper conductor three-core medium-voltage power cable

Abstract

The utility model provides a grounding copper conductor three-core medium-voltage power cable, which relates to the technical field of medium-voltage power cables and comprises a guide core, an insulation filling layer is arranged on the outer surface of the guide core, a protection assembly is arranged on the outer surface of the insulation filling layer, a protection sleeve is arranged on the outer surface of the protection assembly, and a grounding copper conductor is arranged in the protection sleeve. A clamping groove is formed in the outer surface of one side of the protective sleeve, a clamping block is arranged on the outer surface of the other side of the protective sleeve, the protective assembly comprises a graphene composite layer, and an armor layer is arranged on the outer surface of the graphene composite layer. According to the utility model, through cooperative use of the insulation filling layer, the graphene composite layer, the armor layer and the fire retardant layer, the heat conduction performance and the fire resistance of the cable can be increased, the fireproof protection required by the cable is provided, and through cooperative use of the clamping blocks and the clamping grooves, the protection sleeve can be dismounted and mounted, so that the fireproof performance of the cable is improved. The replacement of the whole cable is avoided, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medium-voltage power cables, in particular to a three-core medium-voltage power cable with a grounded copper conductor. Background Art

[0002] Medium voltage power cable is a cable used to transmit medium voltage electric energy. It is usually used to transmit electric energy from substations to distribution stations, industrial facilities, buildings, etc. The rated voltage of medium voltage power cable is generally between 1kV and 35kV.

[0003] In the prior art, a wear-resistant layer is usually provided on the outside of the cable and is integrated with the cable. However, the cable is usually subjected to complex environmental and operating conditions such as bending, stretching, and friction. These mechanical actions will cause the wear-resistant layer to be worn. Once the wear-resistant layer is damaged, the staff needs to replace the entire cable, which increases the cost of use. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that a wear-resistant layer is usually provided on the outside of the cable and is integrally arranged with the cable, and the cable is usually subjected to complex environmental and operating conditions such as bending, stretching, and friction. These mechanical actions will cause the wear-resistant layer to be worn. When the wear-resistant layer is damaged, the staff needs to replace the entire cable, which increases the cost of use. A grounded copper conductor three-core medium-voltage power cable is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a grounded copper conductor three-core medium-voltage power cable, comprising: a conductor core, an insulating filling layer is arranged on the outer surface of the conductor core, a protective component is arranged on the outer surface of the insulating filling layer, a protective sleeve is arranged on the outer surface of the protective component, a card slot is arranged on the outer surface of one side of the protective sleeve, and a card block is arranged on the outer surface of the other side of the protective sleeve;

[0006] The protection component comprises a graphene composite layer, and an armor layer is arranged on the outer surface of the graphene composite layer.

[0007] Preferably, the position of the card block matches the position of the card slot, and the outer surface of the card block is engaged with the inner surface of the card slot.

[0008] Preferably, a water-blocking layer is provided on the outer surface of the armor layer, and a fire-blocking layer is provided on the outer surface of the water-blocking layer.

[0009] Preferably, the outer surface of the fire barrier layer is arranged in close contact with the outer surface of the protective sleeve.

[0010] Preferably, the inner surface of the graphene composite layer is fixedly connected to the outer surface of the insulating filling layer.

[0011] Preferably, notches are provided on the outer surface of the protective sleeve near both sides.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, the insulating filling layer, the graphene composite layer, the armor layer and the fire barrier layer are used together to increase the thermal conductivity and fire resistance of the cable, and provide the fire protection required for the cable. At the same time, the protective cover can be disassembled and installed by using the card block and the card slot together, avoiding the replacement of the entire cable and reducing the use cost.

[0014] 2. In the present invention, the provision of the notch facilitates the removal of the protective cover, further improving the removal efficiency of the protective cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a grounded copper conductor three-core medium-voltage power cable is proposed for the utility model;

[0016] Figure 2 A schematic diagram of the protective sheath structure of a grounded copper conductor three-core medium-voltage power cable is proposed for the utility model;

[0017] Figure 3 A cross-sectional view of a protective sheath of a grounded copper conductor three-core medium-voltage power cable is provided for the utility model;

[0018] Figure 4 The utility model provides a schematic structural diagram of a protective component of a grounded copper conductor three-core medium-voltage power cable.

[0019] Legend: 1. Guide core; 2. Protective component; 3. Insulating filling layer; 4. Protective sleeve; 5. Notch; 6. Card slot; 7. Card block; 201. Graphene composite layer; 202. Armor layer; 203. Water-blocking layer; 204. Fire-blocking layer. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] 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 of the following disclosure.

[0022] Embodiment 1, as Figure 1-Figure 4As shown, the utility model provides a grounded copper conductor three-core medium-voltage power cable, comprising: a conductor core 1, an insulating filling layer 3 is provided on the outer surface of the conductor core 1, a protective component 2 is provided on the outer surface of the insulating filling layer 3, a protective sleeve 4 is provided on the outer surface of the protective component 2, a card slot 6 is provided on the outer surface of one side of the protective sleeve 4, and a card block 7 is provided on the outer surface of the other side of the protective sleeve 4, the protective component 2 comprises a graphene composite layer 201, an armor layer 202 is provided on the outer surface of the graphene composite layer 201, the position of the card block 7 matches the position of the card slot 6, the outer surface of the card block 7 is engaged with the inner surface of the card slot 6, the outer surface of the armor layer 202 is provided with a water-blocking layer 203, the outer surface of the water-blocking layer 203 is provided with a fire-blocking layer 204, the outer surface of the fire-blocking layer 204 is in contact with the outer surface of the protective sleeve 4, and the inner surface of the graphene composite layer 201 is fixedly connected to the outer surface of the insulating filling layer 3.

[0023] The effect achieved by the entire embodiment 1 is that the conductor core 1 is formed by twisting three conductors, wherein the insulating filling layer 3 is made of foamed polyethylene, which has good electrical properties and mechanical strength, moisture resistance and thermal conductivity, and is helpful to improve the performance stability of the cable; the graphene composite layer 201 is made of graphene, which has excellent electrical conductivity, thermal conductivity and mechanical properties; the graphene composite layer 201 can be bonded with the insulating filling layer 3 to further increase the thermal conductivity and fire resistance of the cable; the armor layer 202 is made of aluminum-magnesium alloy, which has the characteristics of light weight and high strength, and has good corrosion resistance and good thermal conductivity, which is helpful for the heat dissipation of the cable and improves the operation safety of the cable; the water-blocking layer 203 is made of high-density polyethylene The epoxy material has radial water-blocking function and can effectively prevent water penetration. The fire-blocking layer 204 is made of epoxy resin and has good insulation and flame-retardant properties, providing the fire protection required for the cable. At the same time, during the use of the cable, the protective sleeve 4 can be fitted along the fire-blocking layer 204, and then the block 7 is aligned with the slot 6, and then the two sides of the protective sleeve 4 are squeezed to make the block 7 fit into the slot 6, and the protective sleeve 4 is installed on the outside of the fire-blocking layer 204 to provide a wear-resistant layer for the cable. When the protective sleeve 4 is damaged, the block 7 can be pushed out of the slot 6 to unfold the protective sleeve 4, which is convenient for removal and replacement, avoiding replacement of the entire cable and reducing the cost of use.

[0024] Embodiment 2, as Figure 1-Figure 4 As shown, notches 5 are provided on the outer surface of the protective sleeve 4 near both sides.

[0025] The effect achieved by the entire embodiment 2 is that, through the setting of the notch 5, the protective cover 4 is easily disassembled, and the disassembly efficiency of the protective cover 4 is further improved.

[0026] Working principle: The conductor core 1 is made of three strands of guide twisted together, wherein the insulating filling layer 3 has good electrical properties and mechanical strength, moisture resistance and thermal conductivity, which helps to improve the performance stability of the cable. The graphene composite layer 201 has excellent electrical conductivity, thermal conductivity and mechanical properties. The graphene composite layer 201 can be bonded with the insulating filling layer 3 to further increase the thermal conductivity and fire resistance of the cable. The armor layer 202 is light and high-strength, and has good corrosion resistance and good thermal conductivity, which helps the cable dissipate heat and improve the operating safety of the cable. The water-blocking layer 203 has a material with radial water-blocking function, which can effectively To prevent moisture penetration, the fire barrier layer 204 has good insulation and flame retardant properties, providing the fire protection required for the cable. At the same time, during the use of the cable, the protective sleeve 4 can be fitted along the fire barrier layer 204, and then the block 7 can be aligned with the slot 6, and then the two sides of the protective sleeve 4 can be squeezed to make the block 7 fit into the slot 6, and the protective sleeve 4 can be installed on the outside of the fire barrier layer 204 to provide a wear-resistant layer for the cable. When the protective sleeve 4 is damaged, the block 7 can be pushed out of the slot 6 through the notch 5 to unfold the protective sleeve 4, which is convenient for removal and replacement, avoiding replacement of the entire cable and reducing the cost of use.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. 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 and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A grounded copper conductor three-core medium voltage power cable, characterized in that: include: A guide core (1), wherein an insulating filling layer (3) is provided on the outer surface of the guide core (1), a protective component (2) is provided on the outer surface of the insulating filling layer (3), a protective sleeve (4) is provided on the outer surface of the protective component (2), a card slot (6) is provided on one side of the outer surface of the protective sleeve (4), and a card block (7) is provided on the other side of the outer surface of the protective sleeve (4); The protection component (2) comprises a graphene composite layer (201), and an armor layer (202) is provided on the outer surface of the graphene composite layer (201).

2. The grounded copper conductor three-core medium voltage power cable according to claim 1, characterized in that: The position of the card block (7) matches the position of the card slot (6), and the outer surface of the card block (7) is engaged with the inner surface of the card slot (6).

3. The grounded copper conductor three-core medium voltage power cable according to claim 2, characterized in that: The outer surface of the armor layer (202) is provided with a water-blocking layer (203), and the outer surface of the water-blocking layer (203) is provided with a fire-blocking layer (204).

4. The grounded copper conductor three-core medium voltage power cable according to claim 3, characterized in that: The outer surface of the fire barrier layer (204) is arranged in close contact with the outer surface of the protective sleeve (4).

5. The grounded copper conductor three-core medium voltage power cable according to claim 4, characterized in that: The inner surface of the graphene composite layer (201) is fixedly connected to the outer surface of the insulating filling layer (3).

6. The grounded copper conductor three-core medium voltage power cable according to claim 5, characterized in that: The outer surface of the protective sleeve (4) is provided with notches (5) near two sides.

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