High-voltage copper core power cable with good insulativity

Abstract

The utility model discloses a high-voltage copper core power cable with good insulativity, which comprises an outer sheath layer, an inner sheath layer, an insulating triangular sleeve and copper cable cores, the outer sides of the plurality of strands of copper cable cores are all coated with an insulating water-blocking tape, the insulating water-blocking tape is sleeved in the inner cavity of the insulating triangular sleeve, an inner insulating filling layer is filled between the insulating triangular sleeve and the insulating water-blocking tape, and the inner insulating filling layer is filled between the insulating triangular sleeve and the insulating water-blocking tape. And the outer side of the insulating triangular sleeve is sleeved with an inner sheath layer. The high-voltage copper core power cable has the beneficial effects that the insulating property of the high-voltage copper core power cable with good insulating property can be greatly improved by utilizing the insulating water-blocking tape, the inner insulating filling layer, the insulating triangular sleeve and the outer insulating filling layer; and the inner insulating filling layer, the insulating triangular sleeve and the outer insulating filling layer can form buffer protection on the insulating water-blocking tape wrapping the copper cable core, so that mechanical damage to the insulating water-blocking tape when the power cable is bent during construction is prevented, cable insulation breakdown accidents during ultrahigh-voltage transmission are effectively avoided, and the use safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a high-voltage copper core power cable with good insulation. Background Art

[0002] Power cables are used to transmit and distribute electric energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of the power system, including 1-500KV and above various voltage levels, various insulation power cables, and high-voltage copper core cables with good insulation are often required for use in high-voltage power transmission.

[0003] The prior art discloses a cross-linked polyethylene water-blocking power cable with a publication number of CN206976079U, which includes a conductor core, a conductor tape, an inner screen layer, an insulating layer, an outer screen layer, a sheath layer, an anti-corrosion layer, and an outer sheath layer arranged in sequence from the inside to the outside. The conductor core is made of single copper wires and is designed as a five-separated conductor, and a double-sided insulating water-blocking tape is placed between each separated conductor; the conductor tape is arranged between the conductor core and the inner screen layer. In addition, the conductor tape is designed as a semi-conductive water-blocking binding tape, and an insulating water-blocking tape is placed between the copper single wires in the conductor core. Through the arrangement of these water-blocking binding tapes, the power cable of the utility model has better water-blocking and insulation properties under 132kV ultra-high voltage use conditions, meets the transmission requirements in ultra-high voltage lines, and fills the market gap for this product.

[0004] The above-mentioned utility model utilizes the double-sided insulating water-blocking tape placed between each separated conductor and the insulating water-blocking tape placed between the copper monofilaments to improve the insulation of the cable. The insulation is good when coping with ordinary high-voltage transmission, but when carrying out ultra-high-voltage transmission, its insulation performance is relatively general. In addition, during the construction of the cable, the insulating water-blocking tape is greatly affected by the bending of the cable, which can easily cause the double-sided insulating water-blocking tape and the insulating water-blocking tape to be mechanically worn, thereby easily causing cable insulation breakdown accidents, and the safety is general. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a high-voltage copper core power cable with good insulation, which has better insulation performance and good bending resistance, making the insulating components less prone to mechanical damage and having higher safety in use, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned better insulation performance and have good bending resistance, so that the insulating parts are not prone to mechanical damage and have the advantages of higher safety in use, the specific technical scheme adopted by the utility model is as follows: a high-voltage copper core power cable with good insulation, comprising an outer sheath layer, an inner sheath layer, an insulating triangle sleeve and a copper cable core, the outer sides of the multiple strands of the copper cable core are all covered with insulating water-blocking tape, and the insulating water-blocking tape is sleeved in the inner cavity of the insulating triangle sleeve, and an inner insulating filling layer is filled between the insulating triangle sleeve and the insulating water-blocking tape, adjacent insulating triangle sleeves are bonded to each other, the outer side of the insulating triangle sleeve is sleeved with an inner sheath layer, and the outer side of the inner sheath layer and the insulating triangle sleeve is filled with an outer insulating filling layer, the outer side of the inner sheath layer is coated with a fire-resistant and flame-retardant layer, and the outer side of the fire-resistant and flame-retardant layer is sleeved with a metal shielding layer, the outer side of the metal shielding layer is sleeved with a waterproof pleated diaphragm, and the outer side of the waterproof pleated diaphragm is sleeved with a buffer water-blocking tape, and the outer side of the buffer water-blocking tape is coated with an outer sheath layer.

[0009] Furthermore, an outer waterproof filling layer is filled between the inner side of the buffer water blocking tape and the outer side of the waterproof pleated diaphragm, an inner waterproof filling layer is filled between the inner side of the waterproof pleated diaphragm and the outer side of the metal shielding layer, and an early warning wire is buried in the inner waterproof filling layer.

[0010] Furthermore, the outer sheath layer and the inner sheath layer are both made of cross-linked polyethylene material.

[0011] Furthermore, the outer insulating filling layer and the inner insulating filling layer are both made of polypropylene material.

[0012] Furthermore, the outer waterproof filling layer and the inner waterproof filling layer are both made of polyurethane foam.

[0013] Furthermore, the cross-section of the insulating triangle sleeve is a regular triangle.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a high-voltage copper core power cable with good insulation, which has the following beneficial effects:

[0016] (1) The utility model is provided with an inner insulating filling layer, an insulating triangle sleeve and an outer insulating filling layer. The multiple copper cable cores are respectively sleeved in the insulating water-blocking tape, and then the multiple copper cable cores sleeved with the insulating water-blocking tape are sleeved in the inner cavity of the insulating triangle sleeve, and the inner insulating filling layer is filled between the inner wall of the insulating triangle sleeve and the insulating water-blocking tape. Then, multiple such insulating triangle sleeves are bonded together and then sleeved in the center of the inner sheath layer, and the inner cavity of the inner sheath layer is filled with the outer insulating filling layer. The insulating water-blocking tape, the inner insulating filling layer, the insulating triangle sleeve and the outer insulating filling layer can greatly improve the insulation performance of a high-voltage copper core power cable with good insulation. The inner insulating filling layer, the insulating triangle sleeve and the outer insulating filling layer can form a buffer protection for the insulating water-blocking tape wrapped on the copper cable core, prevent the insulating water-blocking tape from being mechanically damaged when the power cable is bent during construction, effectively avoid cable insulation breakdown accidents during ultra-high voltage transmission, and have high safety in use.

[0017] (2) The utility model is provided with an outer waterproof filling layer, a waterproof pleated diaphragm, an inner waterproof filling layer and an early warning wire. The outer side of the inner sheath layer is coated with a fire-resistant and flame-retardant layer, which can improve the safety of the power cable in a high temperature environment. The outer side of the fire-resistant and flame-retardant layer is sleeved with a metal shielding layer, which can limit the influence of the external electromagnetic field on the inside of the power cable. The outer side of the metal shielding layer is sleeved with a waterproof pleated diaphragm, and the inner waterproof filling layer is filled between the waterproof pleated diaphragm and the metal shielding layer. The outer side of the waterproof pleated diaphragm is sleeved with a buffer water-blocking tape, and the inner side of the buffer water-blocking tape and the outer side of the waterproof pleated diaphragm are filled. It is filled with an outer waterproof filling layer. The buffer water-blocking tape, the outer waterproof filling layer, the waterproof pleated diaphragm and the inner waterproof filling layer are used to greatly improve the water-blocking and waterproofing capabilities of a high-voltage copper-core power cable with good insulation. In addition, an early warning wire is buried in the inner waterproof filling layer. When external water seeps into the inner waterproof layer, the water will contact the energized early warning wire to cause a short circuit, thereby causing the alarm device connected to the outer end of the early warning wire to sound an alarm to remind the user to conduct inspections and maintenance, so as to improve the safety of the power cable. Finally, the outer side of the buffer water-blocking tape is covered with an outer sheath layer, which has a good wear-resistant protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a high-voltage copper core power cable with good insulation according to an embodiment of the utility model;

[0020] Figure 2 According to the embodiment of the utility model Figure 1 A magnified image of point A;

[0021] Figure 3 According to the embodiment of the utility model Figure 1 A magnified view of point B;

[0022] Figure 4 It is a stereoscopic diagram of an insulating triangle sleeve of a high-voltage copper core power cable with good insulation according to an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Outer sheath layer; 2. Inner sheath layer; 3. Buffer water-blocking tape; 4. Metal shielding layer; 5. Fire-resistant and flame-retardant layer; 6. Insulating triangle sleeve; 7. Insulating water-blocking tape; 8. Copper cable core; 9. Inner insulating filling layer; 10. Outer insulating filling layer; 11. Outer waterproof filling layer; 12. Waterproof pleated diaphragm; 13. Inner waterproof filling layer; 14. Early warning wire. DETAILED DESCRIPTION

[0025] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0026] According to an embodiment of the utility model, a high-voltage copper core power cable with good insulation is provided.

[0027] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4As shown, according to an embodiment of the utility model, a high-voltage copper core power cable with good insulation includes an outer sheath layer 1, an inner sheath layer 2, an insulating triangle sleeve 6 and a copper cable core 8. The outer sides of the multiple copper cable cores 8 are all covered with insulating water-blocking tapes 7, and the insulating water-blocking tapes 7 are sleeved in the inner cavity of the insulating triangle sleeve 6, and an inner insulating filling layer 9 is filled between the insulating triangle sleeve 6 and the insulating water-blocking tape 7, adjacent insulating triangle sleeves 6 are bonded to each other, the outer side of the insulating triangle sleeve 6 is sleeved with the inner sheath layer 2, and the outer side of the inner sheath layer 2 and the insulating triangle sleeve 6 is filled with an outer insulating filling layer 10, the outer side of the inner sheath layer 2 is covered with a fire-resistant and flame-retardant layer 5, and the outer side of the fire-resistant and flame-retardant layer 5 is sleeved with a metal shielding layer 4, and the outer side of the metal shielding layer 4 is sleeved with A waterproof corrugated diaphragm 12 is provided, and a buffer water-blocking tape 3 is sleeved on the outside of the waterproof corrugated diaphragm 12, and an outer sheath layer 1 is coated on the outside of the buffer water-blocking tape 3, so that the insulating water-blocking tape 7, the inner insulating filling layer 9, the insulating triangular sleeve 6 and the outer insulating filling layer 10 can greatly improve the insulation performance of a high-voltage copper core power cable with good insulation, and the inner insulating filling layer 9, the insulating triangular sleeve 6 and the outer insulating filling layer 10 can form a buffer protection for the insulating water-blocking tape 7 coated on the copper cable core 8, so as to prevent mechanical damage to the insulating water-blocking tape 7 when the power cable is bent during construction, and effectively avoid cable insulation breakdown accidents during ultra-high voltage transmission, and the safety of use is high.

[0028] In one embodiment, an outer waterproof filling layer 11 is filled between the inner side of the buffer water-blocking tape 3 and the outer side of the waterproof pleated diaphragm 12, an inner waterproof filling layer 13 is filled between the inner side of the waterproof pleated diaphragm 12 and the outer side of the metal shielding layer 4, and an early warning wire 14 is buried in the inner waterproof filling layer 13, so that the buffer water-blocking tape 3, the outer waterproof filling layer 11, the waterproof pleated diaphragm 12 and the inner waterproof filling layer 13 can greatly improve the water-blocking and waterproofing capabilities of a high-voltage copper-core power cable with good insulation. In addition, an early warning wire 14 is buried in the inner waterproof filling layer 13. When external water penetrates into the inner waterproof layer, the water will contact the energized early warning wire 14 to cause a short circuit, thereby causing the alarm device connected to the outer end of the early warning wire 14 to sound an alarm to remind the user to conduct inspections and maintenance, so as to improve the safety of the power cable.

[0029] In one embodiment, the outer sheath layer 1 and the inner sheath layer 2 are both made of cross-linked polyethylene material.

[0030] In one embodiment, the outer insulating filling layer 10 and the inner insulating filling layer 9 are both made of polypropylene material.

[0031] In one embodiment, the outer waterproof filling layer 11 and the inner waterproof filling layer 13 are both made of polyurethane foam.

[0032] In one embodiment, the cross-section of the insulating triangle sleeve 6 is a regular triangle.

[0033] Working principle: The utility model is provided with an inner insulating filling layer 9, an insulating triangle sleeve 6 and an outer insulating filling layer 10, and the multiple copper cable cores 8 are respectively sleeved in the insulating water blocking tape 7, and then the multiple copper cable cores 8 sleeved with the insulating water blocking tape 7 are sleeved in the inner cavity of the insulating triangle sleeve 6, and the inner insulating filling layer 9 is filled between the inner wall of the insulating triangle sleeve 6 and the insulating water blocking tape 7, and then multiple such insulating triangle sleeves 6 are bonded together, and then sleeved in the center of the inner sheath layer 2, and the inner cavity of the inner sheath layer 2 is filled with the outer insulating filling layer 10, using the insulating water blocking tape 7, the inner insulating filling layer 9, The insulating triangle sleeve 6 and the outer insulating filling layer 10 can greatly improve the insulation performance of a high-voltage copper core power cable with good insulation, and the inner insulating filling layer 9, the insulating triangle sleeve 6 and the outer insulating filling layer 10 can form a buffer protection for the insulating water-blocking tape 7 coated on the copper cable core 8, preventing the insulating water-blocking tape 7 from being mechanically damaged when the power cable is bent during construction, effectively avoiding cable insulation breakdown accidents during ultra-high voltage transmission, and having high safety in use. In addition, the utility model is provided with an outer waterproof filling layer 11, a waterproof pleated diaphragm 12, an inner waterproof filling layer 13 and an early warning wire 14, and the inner waterproof filling layer 13 is provided with a waterproof pleated diaphragm 12, an inner waterproof filling layer 13 and an early warning wire 14. The outer side of the sheath layer 2 is coated with a fire-resistant and flame-retardant layer 5, which can improve the safety of the power cable in a high-temperature environment. The outer side of the fire-resistant and flame-retardant layer 5 is sleeved with a metal shielding layer 4, which can limit the influence of the external electromagnetic field on the inside of the power cable. The outer side of the metal shielding layer 4 is sleeved with a waterproof pleated diaphragm 12, and an inner waterproof filling layer 13 is filled between the waterproof pleated diaphragm 12 and the metal shielding layer 4. The outer side of the waterproof pleated diaphragm 12 is sleeved with a buffer water-blocking tape 3, and an outer waterproof filling layer 11 is filled between the inner side of the buffer water-blocking tape 3 and the outer side of the waterproof pleated diaphragm 12. The buffer water-blocking tape 3 is used to prevent the power cable from being damaged. The outer waterproof filling layer 11, the waterproof pleated diaphragm 12 and the inner waterproof filling layer 13 can greatly improve the water-blocking and waterproofing ability of a high-voltage copper core power cable with good insulation. In addition, an early warning wire 14 is buried in the inner waterproof filling layer 13. When external water penetrates into the inner waterproof layer, the water will contact the energized early warning wire 14 to cause a short circuit, so that the alarm device connected to the outer end of the early warning wire 14 will sound an alarm to remind the user to conduct inspection and maintenance, so as to improve the safety of the power cable. Finally, the buffer water-blocking tape 3 is coated with an outer sheath layer 1 on the outside, which has a good wear-resistant protection effect.

[0034] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage copper core power cable with good insulation, comprising an outer sheath layer (1), an inner sheath layer (2), an insulating triangle sleeve (6) and a copper cable core (8), characterized in that: The outer sides of the multiple strands of the copper cable core (8) are all coated with an insulating water-blocking tape (7), and the insulating water-blocking tape (7) is sleeved in the inner cavity of the insulating triangle sleeve (6), and an inner insulating filling layer (9) is filled between the insulating triangle sleeve (6) and the insulating water-blocking tape (7), and adjacent insulating triangle sleeves (6) are bonded to each other, an inner sheath layer (2) is sleeved on the outer side of the insulating triangle sleeve (6), and an outer insulating filling layer (10) is filled between the inner sheath layer (2) and the insulating triangle sleeve (6), the outer side of the inner sheath layer (2) is coated with a fire-resistant and flame-retardant layer (5), and the outer side of the fire-resistant and flame-retardant layer (5) is sleeved with a metal shielding layer (4), the outer side of the metal shielding layer (4) is sleeved with a waterproof pleated diaphragm (12), and the outer side of the waterproof pleated diaphragm (12) is sleeved with a buffer water-blocking tape (3), and the outer side of the buffer water-blocking tape (3) is coated with an outer sheath layer (1).

2. A high-voltage copper core power cable with good insulation according to claim 1, characterized in that: An outer waterproof filling layer (11) is filled between the inner side of the buffer water blocking tape (3) and the outer side of the waterproof pleated diaphragm (12), an inner waterproof filling layer (13) is filled between the inner side of the waterproof pleated diaphragm (12) and the outer side of the metal shielding layer (4), and an early warning wire (14) is buried in the inner waterproof filling layer (13).

3. A high-voltage copper core power cable with good insulation according to claim 1, characterized in that: The outer sheath layer (1) and the inner sheath layer (2) are both made of cross-linked polyethylene material.

4. A high-voltage copper core power cable with good insulation according to claim 1, characterized in that: The outer insulating filling layer (10) and the inner insulating filling layer (9) are both made of polypropylene material.

5. A high-voltage copper core power cable with good insulation according to claim 2, characterized in that: The outer waterproof filling layer (11) and the inner waterproof filling layer (13) are both made of polyurethane foam.

6. A high-voltage copper core power cable with good insulation according to claim 1, characterized in that: The cross-sectional shape of the insulating triangular sleeve (6) is an equilateral triangle.

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