Environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable

Abstract

The invention relates to the technical field of power cables, and provides an environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable, which comprises an insulated cylinder, a hollow cooling pipe, a metal protection layer, an alarm sounding group, an outer sheath, a male butt joint group and a female butt joint group, one side of each power conductor is provided with a plurality of heat conduction assemblies capable of cooling the power conductor, the heat conduction assemblies are located in the insulating column body, the hollow cooling pipe is arranged in the insulating column body in a penetrating mode and located among the power conductors, and the heat conduction assemblies are all communicated with the hollow cooling pipe; a protection groove is formed in the outer surface of the insulation column body, the metal protection layer is arranged in the protection groove in a sleeved mode, and the multiple alarm sound production sets are arranged. According to the technical scheme, the problem that an environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable in the prior art is low in heat dissipation efficiency is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to an environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable. Background Art

[0002] In today's society, with the rapid development of the economy and the acceleration of urbanization, the demand for electricity is showing a rapid growth trend. Ultra-high voltage transmission, as an efficient and large-capacity power transmission method, occupies a vital position in the modern power system due to its excellent electrical performance and good mechanical properties.

[0003] As the concept of environmental protection becomes increasingly popular and environmental regulations become increasingly stringent, more stringent requirements are placed on the environmental performance of ultra-high voltage cross-linked polyethylene insulated power cables. On the one hand, during the production process of the cables, the use and discharge of environmentally harmful chemicals need to be reduced as much as possible. On the other hand, throughout the entire life cycle of the cables, including operation, maintenance and decommissioning, the impact on the environment should be minimized.

[0004] However, in actual use, the existing environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cables, although the cross-linked polyethylene itself has good insulation properties, under ultra-high voltage, long-term operation and complex and changeable environmental conditions, a large amount of heat will be generated due to the current passing through the conductor and the dielectric loss in the insulation layer. If this heat cannot be dissipated in a timely and effective manner, the internal temperature of the cable will continue to rise. Excessive temperature will not only accelerate the aging of the insulation material and reduce the insulation performance, but also lead to a decrease in the current carrying capacity of the cable. In severe cases, it may even cause safety accidents such as fire. The existing environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cables mostly have low heat dissipation efficiency in the heat dissipation structure, which makes it difficult to meet the heat dissipation needs of the cable when running under high load. Summary of the Invention

[0005] The present invention provides an environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable, which is used to solve the problem of low heat dissipation efficiency of the environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable in the prior art.

[0006] The technical solution of the present invention is as follows: an environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable, comprising an insulating cylinder, a hollow cooling tube, a metal protective layer, an alarm sounding group, an outer sheath, a male docking group and a female docking group, a plurality of power conductors arranged at equal angles on the insulating cylinder, a plurality of heat-conducting components capable of cooling the power conductors are provided on one side of each of the power conductors, the heat-conducting components are located in the insulating cylinder, the hollow cooling tube is arranged through the insulating cylinder, the hollow cooling tube is located between the plurality of power conductors, and the plurality of heat-conducting components are connected to the hollow cooling tube, a protective groove is provided on the outer surface of the insulating cylinder, the metal protective layer is sleeved in the protective groove, the alarm sounding group There are several groups, and the insulating column is provided with several alarm channels connected to the protective groove. The alarm sounding group corresponds to the alarm channel one by one, and the alarm sounding group is arranged in the alarm channel and is connected to the hollow cooling pipe. The outer sheath is sleeved on the insulating column, and the metal protective layer is located in the outer sheath. The male docking group is arranged on one side of the insulating column, and the female docking group is arranged on the other side of the insulating column. The female docking group and the male docking group are staggered. An air intake pipe connected to the hollow cooling pipe is provided through the female docking group, and a quick-connect component capable of connecting the male docking group and the female docking group is sealed and detachable on the female docking group and the male docking group.

[0007] In order to facilitate the rapid docking of the power conductors, a conductive protrusion is provided at one end of the power conductor close to the male docking group, and a conductive groove adapted to the conductive protrusion is provided at one end of the power conductor close to the female docking group.

[0008] As a preferred technical solution of the present invention, the heat conduction component includes a heat conduction box, a ceramic insulating block and a heat conduction fan. The heat conduction box is arranged in the insulating column and is connected to the hollow cooling tube. The ceramic insulating block is arranged on the side of the heat conduction box away from the hollow cooling tube. The ceramic insulating block is in contact with one side of the power conductor. The heat conduction fan is rotatably arranged in the heat conduction box, and one side of the heat conduction fan is located in the hollow cooling tube.

[0009] As a preferred technical solution of the present invention, the alarm sound group includes an alarm tube and a vibration reed. The alarm tube is arranged in the alarm channel. One end of the alarm tube is connected to the hollow cooling tube. The vibration reed is arranged in the hollow cooling tube.

[0010] In order to facilitate the sequential docking of multiple power cables, the male docking group includes a male insulating docking block, and a plurality of the male insulating docking blocks are provided and arranged at equal angles on one side of the insulating column.

[0011] In order to facilitate the sequential docking of multiple power cables, the female docking group includes a female insulating docking block. There are several female insulating docking blocks, which are arranged at equal angles on one side of the insulating column. The female insulating docking blocks correspond one-to-one to the male insulating docking blocks.

[0012] In order to improve the stability of the power cable connection, the quick-connect assembly includes an arc-shaped docking ring, two of which are detachable through quick-connect bolts and sealing sleeves are provided on several of the male insulating docking blocks and the female insulating docking blocks. The arc-shaped docking ring is threadedly connected with several fixing bolts that can threadably fix the male insulating docking block and the female insulating docking block.

[0013] In order to facilitate the rapid docking of the hollow cooling pipe, one end of the hollow cooling pipe is provided with a gas delivery protrusion, and the other end is provided with a gas delivery groove adapted to the gas delivery protrusion. One end of the air intake pipe is connected to the gas delivery groove, and the gas delivery protrusion is provided with a gas delivery through hole connected to the air intake pipe.

[0014] In order to facilitate filling gas into the hollow cooling pipe, an internal thread groove is provided on the side of the air inlet pipe away from the hollow cooling pipe, and a gas supply head or a gas blocking head can be threadedly connected to the internal thread groove.

[0015] The beneficial effects of the present invention are: 1. In the present invention, a heat conducting component and a hollow cooling pipe are provided, and cooling gas is conveyed into the hollow cooling pipe through a gas delivery head along an air inlet pipe, so that the conveyed gas flows in the hollow cooling pipe. When the cooling gas flows in the hollow cooling pipe, the gas drives the heat conducting fan to rotate. The heat conducting fan drives the gas movement, which not only increases the contact area between the gas and the heat conducting box and cools the ceramic conductor, but also can quickly transfer the heat generated by the power conductor to the heat conducting box and then discharge it through the hollow cooling pipe, effectively avoiding the power conductor from reducing the transmission efficiency or causing safety hazards due to excessive temperature. At the same time, it can greatly extend the service life of the insulating column and ensure the long-term stable operation of the cable. At the same time, the method of using air or other cooling medium to flow in the hollow cooling pipe to carry away heat is more environmentally friendly than the traditional heat dissipation method, and reduces the use of additional heat dissipation equipment and energy consumption. 2. In the present invention, by providing conductive protrusions and conductive grooves at both ends of the power conductor, not only can the quick connection between the power conductors be ensured, but also a stable conductive connection can be provided, contact resistance can be reduced, and the stability and reliability of power transmission can be improved. In addition, the male and female docking groups are staggered, the arc-shaped docking rings in the quick-connect assembly are detachable by quick-connect bolts, and the sealing sleeves are provided on the male and female insulating docking blocks, and then fixed by fixing bolts. This connection method makes the connection and removal of the power cable not only simple and convenient, but also greatly improves the construction efficiency. 3. In the present invention, by setting an alarm sound component, when the protective cover on the surface of the cable is abnormal and the pressure inside the metal protective cover changes, the gas in the hollow cooling tube will flow in the alarm tube, and then the vibrating reed will vibrate and make a sound, reminding the staff to find the cable fault in time so that they can take corresponding measures to avoid the expansion of the fault and ensure the safe operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 It is a schematic structural diagram of a partial cross-section of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the local enlarged structure at A in the middle; Figure 4 It is a schematic structural diagram of a partial cross-section of the heat conducting component in the present invention; Figure 5 This is a schematic diagram of the structure of the insulating column, power conductor and metal protective layer in the present invention; Figure 6 This is a schematic diagram of the structure of the insulating column, the male docking group and the female docking group in the present invention; Figure 7 This is a schematic diagram of the structure of the hollow cooling pipe, air intake pipe, heat conduction component and alarm sounding group in the present invention; Figure 8 This is a schematic diagram of the structure of the air inlet pipe, air delivery head and air blocking head in the present invention; Figure 9 This is a structural schematic diagram of multiple environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cables connected in series in sequence according to the present invention.

[0018] In the figure: 001, thermal conductive assembly; 002, alarm sound assembly; 003, male docking assembly; 004, female docking assembly; 005, quick-connect assembly; 1. Insulating cylinder; 2. Power conductor; 3. Hollow cooling tube; 4. Metal protective layer; 5. Outer sheath; 6. Air inlet pipe; 7. Heat conduction box; 8. Ceramic insulation block; 9. Heat conduction fan; 10. Alarm tube; 11. Vibrating reed; 12. Male insulating docking block; 13. Female insulating docking block; 14. Arc docking ring; 15. Fixing bolt; 16. Gas supply head; 17. Gas blocking head. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 9 As shown, this embodiment proposes an environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable, including an insulating cylinder 1, a hollow cooling tube 3, a metal protective layer 4, an alarm sounding group 002, an outer sheath 5, a male docking group 003 and a female docking group 004.

[0021] Among them, a number of power conductors 2 are arranged at equal angles on the insulating column 1, and a number of heat-conducting components 001 capable of cooling the power conductor 2 are provided on one side of each power conductor 2, and the heat-conducting components 001 are located inside the insulating column 1.

[0022] Among them, the heat conduction component 001 includes a heat conduction box 7, a ceramic insulating block 8 and a heat conduction fan 9. The heat conduction box 7 is arranged in the insulating column 1 and is connected to the hollow cooling tube 3. The ceramic insulating block 8 is arranged on the side of the heat conduction box 7 away from the hollow cooling tube 3. The ceramic insulating block 8 is in contact with one side of the power conductor 2. The heat conduction fan 9 is rotatably arranged in the heat conduction box 7. One side of the heat conduction fan 9 is located in the hollow cooling tube 3. The hollow cooling tube 3 is arranged through the insulating column 1. The hollow cooling tube 3 is located between several power conductors 2. Several heat conduction components 001 are connected to the hollow cooling tube 3.

[0023] Specifically, when the cooling gas flows in the hollow cooling tube 3, the gas will drive the heat-conducting fan 9 to rotate. The heat-conducting fan 9 drives the gas to move, which not only increases the contact area between the gas and the heat-conducting box 7 and cools the ceramic conductor, but also can quickly transfer the heat generated by the power conductor 2 to the heat-conducting box 7, and then discharge it through the hollow cooling tube 3, effectively avoiding the power conductor 2 from reducing the transmission efficiency or causing safety hazards due to excessive temperature. At the same time, it can greatly extend the service life of the insulating column 1 and ensure long-term stable operation of the cable. At the same time, the method of using air or other cooling media to flow in the hollow cooling tube 3 to carry away heat is more environmentally friendly than traditional heat dissipation methods, and reduces the use of additional heat dissipation equipment and energy consumption.

[0024] As mentioned above, a protective groove is opened on the outer surface of the insulating column 1, and the metal protective layer 4 is arranged in the protective groove. By setting the metal protective layer 4, it can not only effectively resist external physical impact, extrusion and corrosion, provide reliable physical protection for the internal structure of the cable, extend the service life of the cable, but also allow gas to flow between the metal protective layers 4.

[0025] As mentioned above, there are several alarm sound groups 002, and several alarm channels connected to the protective groove are opened on the insulating column 1. The alarm sound group 002 corresponds to the alarm channel one by one. The alarm sound group 002 is arranged in the alarm channel and is connected to the hollow cooling pipe 3. The alarm sound group 002 includes an alarm tube 10 and a vibrating reed 11. The alarm tube 10 is arranged in the alarm channel. One end of the alarm tube 10 is connected to the hollow cooling pipe 3, and the vibrating reed 11 is arranged in the hollow cooling pipe 3.

[0026] Specifically, since gas can flow between the metal protective layers 4, by setting the alarm sound group 002, when the protective cover on the surface of the cable is abnormal, the pressure inside the metal protective cover will change, which will cause the gas in the hollow cooling tube 3 to flow in the alarm tube 10, and then the vibrating reed 11 will vibrate and make a sound, reminding the staff to discover the cable fault in time so that they can take corresponding measures to avoid the expansion of the fault and ensure the safe operation of the power system.

[0027] As mentioned above, the outer sheath 5 is sleeved on the insulating cylinder 1, and the metal protective layer 4 is located inside the outer sheath 5. By setting the outer sheath 5, the protection effect can be further enhanced to prevent moisture, dust, etc. from entering the interior of the cable, ensuring that the cable can work normally even in complex environments.

[0028] As mentioned above, the male docking group 003 is arranged on one side of the insulating column 1, and the female docking group 004 is arranged on the other side of the insulating column 1. The female docking group 004 and the male docking group 003 are staggered. The female docking group 004 is penetrated by an air intake pipe 6 connected to the hollow cooling tube 3, and the female docking group 004 and the male docking group 003 are sealed and detachably provided with a quick-connect component 005 that can connect the male docking group 003 and the female docking group 004.

[0029] The male docking group 003 includes a male insulating docking block 12 , and a plurality of male insulating docking blocks 12 are arranged at equal angles on one side of the insulating column 1 .

[0030] Among them, the female docking group 004 includes a female insulating docking block 13, and there are several female insulating docking blocks 13, which are arranged at equal angles on one side of the insulating column 1. The female insulating docking blocks 13 correspond one-to-one to the male insulating docking blocks 12.

[0031] Among them, the quick-connect assembly 005 includes an arc-shaped docking ring 14, and there are two arc-shaped docking rings 14. The two arc-shaped docking rings 14 are detachable through quick-connect bolts and the sealing sleeves are arranged on several male insulating docking blocks 12 and female insulating docking blocks 13. The arc-shaped docking ring 14 is threadedly connected with several fixing bolts 15 that can threadably fix the male insulating docking block 12 and the female insulating docking block 13.

[0032] Specifically, the arc-shaped docking ring 14 in the quick-connect assembly 005 is detachable through the quick-connect bolts and the sealing sleeve is arranged on the male insulating docking block 12 and the female insulating docking block 13, and then threadedly fixed with the fixing bolts 15. This connection method makes the connection and disassembly of the power cable not only simple and convenient to operate, but also greatly improves the construction efficiency.

[0033] It should be noted that in order to facilitate the rapid docking of the power conductor 2 and the hollow cooling tube 3, the power conductor 2 is provided with a conductive protrusion at one end close to the male docking group 003, and a conductive groove adapted to the conductive protrusion at one end close to the female docking group 004. One end of the hollow cooling tube 3 is provided with a gas delivery protrusion, and the other end is provided with a gas delivery groove adapted to the gas delivery protrusion. One end of the air inlet pipe 6 is connected to the gas delivery groove, and a gas delivery through hole connected to the air inlet pipe 6 is provided on the gas delivery protrusion. The gas can enter the hollow cooling tube 3 through the air inlet pipe 6 and the gas delivery through hole.

[0034] It is further supplemented that an internal thread groove is provided on the side of the air inlet pipe 6 away from the hollow cooling pipe 3 , and a gas delivery head 16 or a gas blocking head 17 can be threadedly connected to the internal thread groove.

[0035] Specifically, when multiple environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cables are docked and installed in sequence, the air intake pipe 6 in the middle position is sealed by an air supply head. It is only necessary to install an air supply head 16 on one side of the air intake pipe 6, and the cold air can be transported by an air pump. In actual use, when the length of the environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cables is too long after docking, secondary pressurization can be performed by connecting the air supply head 16 in the middle.

[0036] It should be noted that when cold air circulates in the hollow cooling tube 3, both ends of the hollow cooling tube 3 on both sides of the environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable need to be sealed to prevent gas from being discharged into the air.

[0037] As mentioned above, the insulating column 1, the male insulating docking block 12 and the female insulating docking block 13 are all made of environmentally friendly cross-linked polyethylene material.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable, characterized in that: include: An insulating column (1), wherein a plurality of power conductors (2) are arranged at equal angles on the insulating column (1), and a plurality of heat-conducting components (001) capable of cooling the power conductor (2) are provided on one side of each of the power conductors (2), and the heat-conducting components (001) are located inside the insulating column (1); A hollow cooling pipe (3) is provided through the insulating column (1), the hollow cooling pipe (3) is located between the plurality of power conductors (2), and the plurality of heat-conducting components (001) are all connected to the hollow cooling pipe (3); A metal protective layer (4), wherein a protective groove is provided on the outer surface of the insulating column (1), and the metal protective layer (4) is sleeved in the protective groove; There are a plurality of alarm sounding groups (002), and a plurality of alarm channels connected to the protective groove are opened on the insulating column (1). The alarm sounding groups (002) correspond to the alarm channels one by one. The alarm sounding groups (002) are arranged in the alarm channels and are connected to the hollow cooling pipe (3); An outer sheath (5) is sleeved on the insulating column (1), and the metal protective layer (4) is located inside the outer sheath (5); A male docking assembly (003) is provided on one side of the insulating column (1); The female docking group (004) is arranged on the other side of the insulating column (1), and the female docking group (004) and the male docking group (003) are arranged in an interlaced manner. The female docking group (004) is provided with an air inlet pipe (6) connected to the hollow cooling pipe (3). The female docking group (004) and the male docking group (003) are sealed and detachably provided with a quick connection component (005) capable of connecting the male docking group (003) and the female docking group (004).

2. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The power conductor (2) is provided with a conductive protrusion at one end close to the male docking group (003), and a conductive groove adapted to the conductive protrusion at one end close to the female docking group (004).

3. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The heat conducting component (001) comprises: A heat conduction box (7) is arranged in the insulating column (1) and is connected to the hollow cooling tube (3); A ceramic insulating block (8) is arranged on a side of the heat conduction box (7) away from the hollow cooling tube (3), and the ceramic insulating block (8) is in contact with one side of the power conductor (2); A heat conduction fan (9) is rotatably arranged in the heat conduction box (7), and one side of the heat conduction fan (9) is located in the hollow cooling tube (3).

4. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The alarm sounding group (002) includes: An alarm tube (10) is arranged in the alarm channel, and one end of the alarm tube (10) is connected to the hollow cooling tube (3); The vibrating reed (11) is arranged in the hollow cooling tube (3).

5. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 1, characterized in that: The male docking assembly (003) comprises: A plurality of male insulating docking blocks (12) are provided and arranged at equal angles on one side of the insulating column (1).

6. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 5, characterized in that: The female docking group (004) comprises: A plurality of female insulating docking blocks (13) are provided and arranged at equal angles on one side of the insulating column (1), and the female insulating docking blocks (13) correspond one to one with the male insulating docking blocks (12).

7. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 6, characterized in that: The quick-connect assembly (005) comprises: Two arc-shaped docking rings (14) are provided. The two arc-shaped docking rings (14) are detachable by quick-connect bolts and the sealing sleeves are provided on the plurality of male insulating docking blocks (12) and the female insulating docking blocks (13). The arc-shaped docking rings (14) are threadedly connected with a plurality of fixing bolts (15) capable of threading the male insulating docking blocks (12) and the female insulating docking blocks (13).

8. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 1, characterized in that: One end of the hollow cooling tube (3) is provided with a gas delivery protrusion, and the other end is provided with a gas delivery groove adapted to the gas delivery protrusion. One end of the air inlet pipe (6) is connected to the gas delivery groove, and the air delivery protrusion is provided with a gas delivery through hole connected to the air inlet pipe (6).

9. The environmentally friendly ultra-high voltage cross-linked polyethylene insulated power cable according to claim 8, characterized in that: An internal thread groove is provided on a side of the air inlet pipe (6) away from the hollow cooling pipe (3), and a gas delivery head (16) or a gas blocking head (17) can be threadedly connected to the internal thread groove.

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