High-performance air-cooled medium-voltage armored cable

Abstract

The utility model provides a high-performance air-cooled medium-voltage armored cable, which comprises a plurality of wire cores, a reinforcing layer wrapping the periphery of the wire cores, and a sheath layer wrapping the periphery of the reinforcing layer, and is characterized in that each wire core comprises a cooling pipe, a conductor wrapping the periphery of the cooling pipe, and a conductor shielding layer wrapping the periphery of the conductor; the cable comprises a conductor shielding layer, an insulating layer wrapping the periphery of the conductor shielding layer, and an insulating shielding layer wrapping the periphery of the insulating layer, a cooling pipe is arranged in the middle of the conductor, a flowing refrigerant is injected into the cooling pipe, and a gaseous refrigerant or a liquid refrigerant is arranged in the cooling pipe, so that the cable can be cooled in a high-power and large-current application scene, and the service life of the cable is prolonged. The flowing refrigerant can quickly transfer heat generated by the cable core to the outside, compared with heat dissipation depending on the cable itself, the heat dissipation performance of the cable is remarkably improved, the aging speed of the cable is reduced, the service life of the cable is prolonged, the possibility of cable faults and the maintenance cost are reduced, and the cable has the advantages of being simple in structure, low in implementation cost, convenient to use and the like. And popularization and implementation are facilitated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-performance cable production, and particularly relates to a high-performance air-cooled medium-voltage armored cable. BACKGROUND

[0002] In the prior art, with the continuous increase of power demand, the traditional cable gradually exposes its shortcomings in application. The traditional cable mainly relies on the natural heat dissipation of the external insulation layer, lacks effective active heat dissipation design, and in the case of high load flow or large current, the heat in the cable is difficult to be effectively discharged, resulting in the temperature rise of the cable, and thus the load capacity of the cable is limited. This shortcoming is particularly prominent in high-power demand application scenarios.

[0003] In the prior art, the heat dissipation capacity of the traditional cable is limited, mainly relies on the natural heat dissipation of the external insulation layer, and is difficult to meet the heat dissipation demand in high-power and large-current application scenarios. In the actual working process of the cable, poor heat dissipation of the cable will directly lead to the temperature rise in the cable, and thus affect the performance of the cable, and even shorten the service life thereof. In addition, the insulation layer material is also prone to aging due to the influence of factors such as temperature, humidity and electromagnetic interference in long-term operation, especially in high temperature or harsh environment, the aging speed is obviously accelerated, the insulation performance is reduced, the reliability of the cable is reduced, the possibility of failure is increased, and the maintenance cost is increased. Therefore, improvement is urgently needed. CONTENT OF THE UTILITY MODEL

[0004] The application aims to solve the technical problems that the heat dissipation capacity of the traditional cable is limited in the prior art, mainly relies on the natural heat dissipation of the external insulation layer, is difficult to meet the use demand of high-power high-current high-heat generation use scenarios, has a negative impact on the cable, accelerates the aging speed of the cable, reduces the service life of the cable, reduces the reliability of the cable, and increases the possibility of failure and maintenance cost of the cable. A high-performance air-cooled medium-voltage armored cable is proposed.

[0005] The application adopts the following scheme, a high-performance air-cooled medium-voltage armored cable, comprising a plurality of cores, a reinforcing layer wrapped on the outer periphery of the core, and a sheath layer wrapped on the outer periphery of the reinforcing layer, the core comprising a cooling pipe, a conductor wrapped on the outer periphery of the cooling pipe, a conductor shielding layer wrapped on the outer periphery of the conductor, an insulation layer wrapped on the conductor shielding layer, and an insulation shielding layer wrapped on the outer periphery of the insulation layer, the cooling pipe is used for flowing refrigerant, and the refrigerant is gaseous refrigerant or liquid refrigerant.

[0006] In some possible embodiments, the refrigerant in the cooling pipe is air, and the flow rate of the air is 3m / s-8m / s.

[0007] In some possible embodiments, the cross-sectional radius of the conductor is greater than the cross-sectional radius of the cooling pipe, and the cross-sectional radius of the conductor is 5-10 times the cross-sectional radius of the cooling pipe.

[0008] In some possible embodiments, the conductor is formed by N strands of conductor single wires, the material of the conductor single wires is a type 5 copper conductor, and N is a positive integer greater than or equal to 2.

[0009] In some possible embodiments, the material of the conductor shielding layer is conductive polyethylene, and the material of the insulation shielding layer is a polyester film.

[0010] In some possible embodiments, the copper tape is coated on the outer periphery of the insulation shielding layer.

[0011] In some possible embodiments, a wrapping layer is coated on the outer periphery of the copper tape, and the material of the wrapping layer is a mica tape.

[0012] In some possible embodiments, an isolation layer is coated on the outer periphery of the wrapping layer, the material of the isolation layer is polypropylene, and a reinforcing layer is coated on the outer periphery of the isolation layer.

[0013] In some possible embodiments, the material of the reinforcing layer is a steel tape, and the thickness of the reinforcing layer is less than the thickness of the isolation layer.

[0014] In some possible embodiments, the material of the sheath layer is polyvinyl chloride, the thickness of the sheath layer is greater than the thickness of the reinforcing layer, and the thickness of the sheath layer is 2-5 times the thickness of the reinforcing layer.

[0015] In some possible embodiments, a filling layer is further filled between the wrapping layer and the copper tape.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] This application provides a high-performance air-cooled medium-voltage armored cable, comprising multiple cores, a reinforcing layer covering the outer periphery of the cores, and a sheath layer covering the outer periphery of the reinforcing layer. Each core includes a cooling tube, a conductor covering the outer periphery of the cooling tube, a conductor shielding layer covering the outer periphery of the conductor, an insulation layer covering the outer periphery of the conductor shielding layer, and an insulating shielding layer covering the outer periphery of the insulation layer. By placing a cooling tube in the middle of the conductor and injecting flowing refrigerant into the cooling tube, and by using gaseous or liquid refrigerant within the cooling tube, the flowing refrigerant can quickly transfer the heat generated by the cores to the outside in high-power and high-current applications. Compared to relying on the cable itself for heat dissipation, this significantly improves the cable's heat dissipation performance, reduces cable aging, extends cable lifespan, enhances cable reliability, reduces the likelihood of cable failure, and lowers maintenance costs. It has the advantages of simple structure, low implementation cost, and ease of promotion and implementation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of a high-performance air-cooled medium-voltage armored cable according to this application. Detailed Implementation

[0019] Combination Figure 1 The content shown further illustrates the technical solution provided in this application: a high-performance air-cooled medium-voltage armored cable includes multiple conductors 1, a reinforcing layer 2 covering the outer periphery of the conductors 1, and a sheath layer 3 covering the outer periphery of the reinforcing layer 2. Each conductor 1 includes a cooling tube 10, a conductor 11 covering the outer periphery of the cooling tube 10, a conductor shielding layer 12 covering the outer periphery of the conductor 11, an insulation layer 13 covering the conductor shielding layer 12, and an insulating shielding layer 14 covering the outer periphery of the insulation layer 13. The cooling tube 10 is used to supply refrigerant flow, and the refrigerant is a gaseous refrigerant or a liquid refrigerant.

[0020] This application provides a high-performance air-cooled medium-voltage armored cable, comprising multiple cores, a reinforcing layer covering the outer periphery of the cores, and a sheath layer covering the outer periphery of the reinforcing layer. Each core includes a cooling tube, a conductor covering the outer periphery of the cooling tube, a conductor shielding layer covering the outer periphery of the conductor, an insulation layer covering the outer periphery of the conductor shielding layer, and an insulating shielding layer covering the outer periphery of the insulation layer. By placing a cooling tube in the middle of the conductor and injecting flowing refrigerant into the cooling tube, and by using gaseous or liquid refrigerant within the cooling tube, the flowing refrigerant can quickly transfer the heat generated by the cores to the outside in high-power and high-current applications. Compared to relying on the cable itself for heat dissipation, this significantly improves the cable's heat dissipation performance, reduces cable aging, extends cable lifespan, enhances cable reliability, reduces the likelihood of cable failure, and lowers maintenance costs. It has the advantages of simple structure, low implementation cost, and ease of promotion and implementation.

[0021] In the implementation of the embodiment, the refrigerant in the cooling pipe 10 is air, and the flow rate of the air is 3-8 m / s.

[0022] In the actual implementation, the pump body is provided to power the refrigerant, and the average flow rate of the air is 5.2 m / s.

[0023] In the implementation of the embodiment, the cross-sectional radius of the conductor 11 is greater than the cross-sectional radius of the cooling pipe 10, and the cross-sectional radius of the conductor 11 is 5-10 times the cross-sectional radius of the cooling pipe 10.

[0024] In the implementation of the embodiment, the conductor 11 is twisted by N strands of conductor single wires, the material of the conductor single wire is a copper conductor of the 5th type, and N is a positive integer greater than or equal to 2.

[0025] In the implementation of the embodiment, the material of the conductor shielding layer 12 is conductive polyethylene, and the material of the insulation shielding layer 14 is a polyester film.

[0026] In the implementation of the embodiment, the copper tape 7 is coated on the outer periphery of the insulation shielding layer 14.

[0027] In the implementation of the embodiment, the copper tape 7 is coated on the outer periphery of the insulation shielding layer 14.

[0028] In the implementation of the embodiment, the copper tape 7 is coated on the outer periphery of the insulation shielding layer 14.

[0029] In the implementation of the embodiment, the copper tape 7 is coated on the outer periphery of the insulation shielding layer 14.

[0030] In the actual implementation, the outer periphery of the copper tape 7 is covered by the insulation shielding layer 14, and further, the reinforcing layer 2 with the reinforcing effect is coated on the outer periphery of the insulation shielding layer 14. Such a structure design not only effectively improves the overall insulation performance and mechanical strength, but also makes the product maintain good performance stability and reliability in complex use environment due to the excellent chemical resistance and electrical insulation performance of the polypropylene material.

[0031] In the implementation of the embodiment, the material of the reinforcing layer 2 is a steel tape, and the thickness of the reinforcing layer 2 is less than the thickness of the insulation layer 5.

[0032] In the implementation process of the embodiment, the material of the sheath layer 3 is polyvinyl chloride, the thickness of the sheath layer 3 is greater than the thickness of the reinforcing layer 2, and the thickness of the sheath layer 3 is 2-5 times the thickness of the reinforcing layer 2.

[0033] In the actual implementation process, the average thickness of the sheath layer 3 is 3.5 times the average thickness of the reinforcing layer 2.

[0034] In the implementation process of the embodiment, the filling layer 6 is also filled between the wrapping layer 4 and the copper strip 7.

[0035] In the actual implementation process, the material of the filling layer is any one or more of flame-retardant cotton rope, cross-linked polyethylene, and silicone sealant.

[0036] In the actual implementation process, the cable provided by the application contains a cooling pipe, and after the cooling medium is introduced into the cooling pipe, heat can be effectively dissipated, and the temperature inside the cable can be reduced. The improvement of the heat dissipation efficiency not only prolongs the service life of the cable, but also improves the current-carrying capacity of the cable. Compared with traditional cables, the cable provided by the application performs more superiorly in the case of large current transmission, and is particularly suitable for long-distance and high-current demand scenarios.

[0037] Due to effective temperature control, the insulation material of the air-cooled cable will not be excessively aged or damaged due to excessive temperature, thereby reducing the probability of cable failure. The layered protection structure including the copper strip in the design further increases the anti-interference ability and mechanical strength of the cable, and improves the reliability and anti-external force impact ability of the cable.

[0038] The application provides a high-performance air-cooled medium-voltage armored cable, which comprises a plurality of cores, a reinforcing layer wrapped outside the periphery of the cores, and a sheath layer wrapped outside the periphery of the reinforcing layer, wherein the core comprises a cooling pipe, a conductor wrapped outside the periphery of the cooling pipe, a conductor shielding layer wrapped outside the periphery of the conductor, an insulation layer wrapped outside the periphery of the conductor shielding layer, and an insulation shielding layer wrapped outside the periphery of the insulation layer. By arranging the cooling pipe in the middle of the conductor and injecting a flowing cooling medium into the cooling pipe, and by arranging gaseous or liquid cooling medium in the cooling pipe, the flowing cooling medium can quickly transfer the heat generated by the core to the outside in the application scenario of high power and large current. Compared with relying on the heat dissipation of the cable itself, the heat dissipation performance of the cable is significantly improved, the aging speed of the cable is reduced, the service life of the cable is improved, the reliability of the cable is improved, the possibility of cable failure is reduced, and the maintenance cost is reduced. The application has the advantages of simple structure, low implementation cost, and easy popularization and implementation.

[0039] The above is an embodiment of the application and does not limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A high performance air-cooled medium voltage armored cable characterized in that, The cable comprises a plurality of cores (1), a reinforcing layer (2) wrapped around the outer periphery of the cores (1), and a sheath layer (3) wrapped around the outer periphery of the reinforcing layer (2), the core (1) comprises a cooling tube (10), a conductor (11) wrapped around the outer periphery of the cooling tube (10), a conductor shield layer (12) wrapped around the outer periphery of the conductor (11), an insulation layer (13) wrapped around the conductor shield layer (12), and an insulation shield layer (14) wrapped around the outer periphery of the insulation layer (13), the cooling tube (10) is used for flowing refrigerant, and the refrigerant is gaseous refrigerant or liquid refrigerant.

2. A high performance air-cooled medium voltage armored cable according to claim 1, characterized in that, The refrigerant in the cooling tube (10) is air, and the flow rate of the air is 3-8 m / s.

3. A high performance air-cooled medium voltage armored cable according to claim 1, characterized in that, The cross-sectional radius of the conductor (11) is greater than the cross-sectional radius of the cooling tube (10), and the cross-sectional radius of the conductor (11) is 5-10 times the cross-sectional radius of the cooling tube (10).

4. A high performance air-cooled medium voltage armored cable according to claim 1, characterized in that, The conductor (11) is twisted by N conductor single wires, the material of the conductor single wire is a 5th copper conductor, and N is a positive integer greater than or equal to 2.

5. A high performance air-cooled medium voltage armored cable according to claim 1, characterized in that, The material of the conductor shield layer (12) is conductive polyethylene, and the material of the insulation shield layer (14) is polyester film.

6. A high performance air-cooled medium voltage armored cable according to claim 1, characterized in that, The outer periphery of the insulation shield layer (14) is wrapped with a copper tape (7).

7. A high performance air-cooled medium voltage armored cable according to claim 6, characterized in that, The outer periphery of the copper tape (7) is wrapped with a wrapping layer (4), and the material of the wrapping layer (4) is a mica tape.

8. A high performance air-cooled medium voltage armored cable according to claim 7, characterized in that, The outer periphery of the wrapping layer (4) is wrapped with a separation layer (5), the material of the separation layer (5) is polypropylene, and the reinforcing layer (2) is wrapped around the outer periphery of the separation layer (5).

9. A high performance air-cooled medium voltage armored cable according to claim 8, characterized in that, The material of the reinforcing layer (2) is a steel tape, and the thickness of the reinforcing layer (2) is less than the thickness of the separation layer (5).

10. A high performance air-cooled medium voltage armored cable according to claim 1, characterized in that, The material of the sheath layer (3) is polyvinyl chloride, the thickness of the sheath layer (3) is greater than the thickness of the reinforcing layer (2), and the thickness of the sheath layer (3) is 2-5 times the thickness of the reinforcing layer (2).

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