Power generation cable

Abstract

The invention discloses a power generation cable, and particularly relates to the technical field of wires and cables, the power generation cable comprises a conductor, an insulating layer, a filling layer, a shielding layer, an inner sheath and an outer sheath, a heat preservation layer and a heat insulation layer are sequentially arranged between the outer sheath and the inner sheath, and a heat preservation cavity, a heat dissipation cavity and a heat insulation cavity are formed from inside to outside; the heat dissipation cavity is communicated with the heat preservation cavity and the heat insulation cavity through the spiral channels. Through the arrangement of the heat preservation cavity, the heat dissipation cavity and the heat insulation cavity, on one hand, the cooling mode can be adjusted according to the internal and external temperature conditions of the cable, the cooling effect is improved, the internal temperature of the cable is prevented from being too high, the cable transmission efficiency is improved, and the overall service life of the cable is prolonged; on the other hand, the communication area of the heat dissipation grooves and the circulation grooves can be adjusted according to the internal temperature condition of the cable, excessive external extremely cold air can be prevented from entering, better heat preservation can be achieved, the heat dissipation effect and the heat preservation effect can be adjusted in a self-adaptive mode according to the internal temperature condition of the cable, and the cable temperature is prevented from being too high or too low.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and more particularly, to a power generation cable. Background Art

[0002] Wind power cables are cables designed specifically for wind power generation systems. They are primarily used to connect the various components of wind turbines, such as towers, generators, and control systems, and transmit the electricity generated by wind turbines to the power grid. Wind power cables are not only responsible for transmitting electricity, but also for transmitting control signals and data, ensuring the normal operation and remote monitoring of wind power generation systems. Wind power cables must not only meet the performance requirements of ordinary cables, but also have the basic characteristics of being soft and resistant to frequent torsion (to adapt to the automatic yaw of wind turbines to the wind), super-strong vertical tensile strength (to adapt to the vertical suspension of wind turbines), and resistance to acid, alkali, salt spray corrosion, and seawater corrosion (to adapt to the power connection of offshore wind turbines). Due to the rich wind resources in northern my country, many wind turbines are installed in northern my country. The climate in the north is relatively cold, and the temperature difference between day and night is large. Therefore, wind power cables also need to have extremely high cold resistance.

[0003] The Chinese patent application number CN202410662160.6 discloses a new energy wind power cable with a special structure that is cold-resistant and high-temperature resistant, and relates to the field of cable technology. The wind power cable includes an inner core, an outer sheath and an insulation layer between the inner core and the outer sheath. The insulation layer includes an inner spiral layer, an isolation layer and an outer spiral layer from the inside to the outside. The inner spiral layer includes an inner spiral support, and the outer spiral layer includes an outer spiral support. The spiral structure of the inner spiral support and the outer spiral support inside the new energy wind power cable can improve the cable's resistance to bending and torsion, and at the same time form an inner spiral airway and an outer spiral airway. The inner and outer spiral airways can be combined to form an almost full-circle airway wrapping for the cable. In a high-temperature environment, the airway is ventilated to isolate the high temperature and take away heat. In a low-temperature environment, it isolates the low temperature, which is beneficial to the insulation of the cable, forming the cable's cold-resistant and high-temperature resistant characteristics. The invention also proposes a production equipment for forming an insulation layer on the cable.

[0004] Although the wind power cable of the above invention can isolate high temperature and take away heat, and isolate low temperature in low temperature environment, which is beneficial to the thermal insulation of the cable, the above cable can only be cooled through the air duct when the internal temperature is too high. The cooling effect is single, which will cause the internal temperature of the cable to gradually increase. When the cable is too high, it will cause the resistivity to increase, resulting in a decrease in the cable transmission efficiency, affecting the overall life of the cable. At the same time, in an extremely cold environment, the extremely cold air will carry the internal temperature of the cable through the air duct, making the internal temperature of the cable too low, resulting in an increase in the resistance of the cable conductor, and reducing the power transmission efficiency. Low temperature will also cause the insulating material to become brittle or even crack, thereby reducing the insulation performance and may cause leakage or short circuit risks.

[0005] The present invention provides a power generation cable, which aims to solve the problems in the prior art of wind power generation cables having a single cooling effect, resulting in a gradual increase in the temperature inside the cable, affecting the overall life of the cable, and in extremely cold environments, the air passing through the airway carries the internal temperature of the cable, resulting in an increase in the resistance of the cable conductor, a reduction in insulation performance, and the risk of leakage or short circuit. Summary of the Invention

[0006] The purpose of the present invention is to provide a power generation cable to solve the problem that the wind power generation cable in the prior art proposed in the above background technology has a single cooling effect, which causes the internal temperature of the cable to gradually increase, affecting the overall life of the cable, and in an extremely cold environment, the air passing through the airway carries the internal temperature of the cable, resulting in an increase in the resistance of the cable conductor, reduced insulation performance, and the risk of leakage or short circuit.

[0007] To achieve the above object, the present invention provides the following technical solution: a power generation cable, comprising a conductor, an insulating layer, a filling layer, a shielding layer, an inner sheath and an outer sheath, A heat preservation layer and a heat insulating layer are sequentially provided between the outer sheath and the inner sheath, forming a heat preservation cavity, a heat dissipation cavity and a heat insulating cavity from the inside to the outside; the heat dissipation cavity is connected to the heat preservation cavity and the heat insulating cavity respectively through a spiral groove; It also includes a flow regulating component, which includes a sealing groove, an adjusting member and a sealing ring. The adjusting member drives the sealing ring to move based on the expansion and contraction of the thermal expansion material to achieve heat exchange control between the heat dissipation cavity and the outside world.

[0008] Preferably, the thermal insulation layer is provided with a first spiral groove, and the heat insulation layer is provided with a second spiral groove, the first spiral groove and the second spiral groove are staggered, and the heat dissipation cavity is connected with the thermal insulation cavity through the first spiral groove and is connected with the thermal insulation cavity through the second spiral groove.

[0009] Preferably, a spiral elastic member is provided in the heat dissipation cavity, the width of the elastic member is greater than the groove width of the first spiral groove and the second spiral groove, and in the initial state, the second spiral groove is covered to block the communication between the thermal insulation cavity and the heat dissipation cavity.

[0010] Preferably, both ends of the elastic member are connected to sliding plates, and the two sliding plates are respectively slidably arranged in two sealing grooves at both ends of the outer sheath. Both sealing grooves are provided with thermal expansion materials, and the thermal expansion materials push the corresponding sliding plates to move due to thermal expansion, so as to drive the elastic member to release the blockage of the second spiral groove.

[0011] Preferably, the thermal insulation layer and the heat insulating layer are respectively provided with a first heat conducting groove and a second heat conducting groove, and the first heat conducting groove and the second heat conducting groove are configured to transfer the heat of the thermal insulation cavity and the heat insulating cavity to the corresponding sealing groove to trigger the expansion of the thermal expansion material and drive the adjustment part and the sealing ring to adjust the opening of the heat dissipation channel.

[0012] Preferably, the sealing ring is fixedly connected to the adjusting member, and the sealing ring is slidably arranged in the adjusting grooves at both ends of the outer sleeve. Both ends of the outer sleeve are respectively provided with heat dissipation grooves connected to the heat dissipation cavity and flow grooves connected to the outside on both sides corresponding to the adjusting grooves.

[0013] Preferably, the moving direction of the adjusting member is parallel to the moving direction of the sliding plate. When the thermal expansion material expands, it pushes the adjusting member to compress the gas in the sealing groove, so that the sealing ring moves away from the heat dissipation groove to increase the opening of the heat dissipation channel.

[0014] Preferably, a limit block is provided in the sealing groove for limiting the displacement of the sliding plate to ensure that the initial position of the elastic member covers the second spiral groove.

[0015] Preferably, support bars are provided in both the heat preservation layer and the thermal insulation layer, and the support bars pass through the first spiral groove and the second spiral groove to enhance structural strength.

[0016] Preferably, the outer sheath is a multi-section structure, and two adjacent sections of the outer sheath are connected to each other through the corresponding flow grooves.

[0017] Technical effects and advantages of the present invention: 1. The present invention is provided with structures such as a heat preservation chamber, a heat dissipation chamber and a heat insulation chamber. On the one hand, it can adjust the cooling mode according to the temperature conditions inside and outside the cable, improve the cooling effect, prevent the internal temperature of the cable from being too high, and improve the cable transmission efficiency and the overall life of the cable. On the other hand, it can adjust the connection area between the heat dissipation groove and the circulation groove according to the internal temperature conditions of the cable, which can prevent excessive entry of extremely cold air from the outside and better keep warm, so that the heat dissipation effect and the heat preservation effect can be adaptively adjusted according to the internal temperature conditions of the cable to prevent the cable temperature from being too high or too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a cross-sectional view of the overall internal structure of the present invention.

[0020] Figure 3 This is a cross-sectional view of the internal structure of the outer sheath of the present invention.

[0021] Figure 4 For the present invention Figure 3A magnified view of the structure of part A.

[0022] Figure 5 For the present invention Figure 4 Enlarged view of the B structure.

[0023] Figure 6 This is a cross-sectional view of the sealing ring of the present invention in the unsealing state.

[0024] Figure 7 This is a cross-sectional view of the internal structure of the sealing groove of the present invention.

[0025] Figure 8 It is a partial structural cross-sectional view of the thermal insulation layer and heat insulating layer of the present invention.

[0026] Figure 9 This is a schematic diagram of the elastic member structure of the present invention.

[0027] Figure 10 It is a schematic diagram of the structure of the adjusting member of the present invention.

[0028] The figures are marked as follows: 1. conductor; 11. insulation layer; 12. filling layer; 13. shielding layer; 14. inner sheath; 15. outer sheath; 2. thermal insulation layer; 21. first spiral groove; 3. thermal insulation layer; 31. second spiral groove; 4. elastic member; 5. sealing groove; 51. sliding plate; 52. first heat conduction groove; 53. second heat conduction groove; 54. limiting block; 55. circulation groove; 56. adjusting groove; 57. heat dissipation groove; 58. adjusting member; 59. sealing ring; 6. thermal insulation chamber; 7. heat dissipation chamber; 8. thermal insulation chamber. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 creative efforts are within the scope of protection of the present invention.

[0030] The wind power cable in the existing technology can only be cooled through the air duct when the internal temperature is too high. The cooling effect is single, which will cause the internal temperature of the cable to gradually increase. When the cable is too high, the resistivity will increase, resulting in a decrease in the cable transmission efficiency, affecting the overall life of the cable. At the same time, in extremely cold environments, the extremely cold air will carry the internal temperature of the cable through the air duct, making the internal temperature of the cable too low, resulting in an increase in the resistance of the cable conductor, and reducing the power transmission efficiency. Low temperature will also cause the insulating material to become brittle or even crack, thereby reducing the insulation performance and may cause leakage or short circuit risks.

[0031] refer to Figures 1 to 10A power generation cable according to an embodiment of the present invention includes a plurality of conductors 1, each conductor 1 is wrapped with an insulating layer 11 on the outside, a plurality of insulating layers 11 are wrapped with a filling layer 12 on the outside, a shielding layer 13 on the outside of the filling layer 12 is wrapped with an inner sheath 14 on the outside, an outer sheath 15 on the outside of the inner sheath 14 is wrapped with an outer sheath 15, and the outer sheath 15 is composed of multiple sections.

[0032] refer to Figures 2 to 6 A thermal insulation layer 2 and a heat insulating layer 3 are sequentially provided between each section of the outer sheath 15 and the inner sheath 14 from the inside to the outside. The outer sheath 15 and the shielding layer 13 are sequentially divided into a thermal insulation cavity 6, a heat dissipation cavity 7 and a heat insulating cavity 8 from the inside to the outside by the thermal insulation layer 2 and the heat insulating layer 3.

[0033] refer to Figure 3 Figure 6 and Figure 8 The thermal insulation layer 2 and the heat insulation layer 3 are respectively provided with a first spiral groove 21 and a second spiral groove 31 which are staggered. The thermal insulation cavity 6 is connected with the heat dissipation cavity 7 through the first spiral groove 21, and the thermal insulation cavity 8 is connected with the heat dissipation cavity 7 through the second spiral groove 31. A spirally arranged elastic member 4 is slidably connected in the heat dissipation cavity 7. The width of the elastic member 4 is greater than the groove width of the first spiral groove 21 and the second spiral groove 31. A plurality of support bars penetrating the first spiral groove 21 and the second spiral groove 31 are provided on the thermal insulation layer 2 and the heat insulation layer 3 to improve the strength of the thermal insulation layer 2 and the heat insulation layer 3.

[0034] refer to Figure 3 、 Figure 4 、 Figure 8 and Figure 9 A sealing groove 5 is provided at both ends of each outer sheath 15, and a sliding plate 51 is fixedly connected to both ends of the elastic member 4 and is respectively slidably connected to the two sealing grooves 5. A first heat conduction groove 52 and a second heat conduction groove 53 corresponding to the positions of the two sealing grooves 5 are respectively provided in the thermal insulation cavity 6 and the thermal insulation cavity 8. A limiting block 54 is provided in the sealing groove 5 corresponding to the position of the first heat conduction groove 52. The two sliding plates 51 at both ends of the elastic member 4 are limited in the two sealing grooves 5, which can provide the cable with bending and torsion resistance.

[0035] refer to Figures 1 to 10, both ends of each section of the outer jacket 15 are provided with a plurality of flow grooves 55 connected to the outside, and both ends of each section of the outer jacket 15 are provided with adjustment grooves 56 corresponding to the positions of the corresponding plurality of flow grooves 55 and connected to each other, and both ends of the heat dissipation cavity 7 are provided with heat dissipation grooves 57 connected to the corresponding flow grooves 55. The number of heat dissipation grooves 57 and the flow grooves 55 are the same and the positions correspond to each other. Each adjustment groove 56 is connected to the corresponding sealing groove 5, and an adjustment member 58 is sealingly and slidingly connected in the sealing groove 5. Both sides of each adjustment member 58 are fixedly connected with a sealing ring 59 that is slidably connected in the corresponding heat dissipation groove 57. The interior of the sealing groove 5 is provided with a thermal expansion material between each adjustment member 58 and the corresponding sliding plate 51, which can be expanded graphite. The interior of the sealing groove 5 is filled with gas on the side of each adjustment member 58 away from the corresponding sliding plate 51, and the adjacent two sections of the outer jacket 15 are connected to each other through the corresponding flow groove 55.

[0036] For specific use, refer to Figures 3 to 5 In the initial state, the thermal expansion material in the two sealing grooves 5 is in an unexpanded state. At this time, the elastic member 4 corresponds to the position of the second spiral groove 31 and blocks the second spiral groove 31. The heat preservation cavity 6 is connected to the interior of the heat dissipation cavity 7 through the first spiral groove 21. The two blocking rings 59 can block the corresponding multiple heat dissipation grooves 57. When the external temperature of the cable is higher than the internal temperature of the cable, the thermal insulation layer 3 can isolate the external high temperature in the insulation cavity 8, preventing the high temperature from directly entering the interior of the cable, so that the cable has high temperature resistance. The external temperature entering the thermal insulation chamber 8 will enter the second heat-conducting groove 53 and transfer the temperature to the corresponding sealing groove 5 through the second heat-conducting groove 53. At this time, the thermal expansion material in the sealing groove 5 will expand due to the heat. Since the sealing groove 5 corresponding to the position of the first heat-conducting groove 52 is provided with a limit block 54, the thermal expansion material in the sealing groove 5 corresponding to the second heat-conducting groove 53 cannot directly overcome the elastic force of the elastic member 4 after expansion. The sliding plate 51 corresponding to the position of the first heat-conducting groove 52 is limited by the limit block 54 and cannot move. Therefore, the elastic member 4 remains in the initial position and cannot move. At the same time, the thermal expansion material in the second heat-conducting groove 53 expands when heated, pushing the corresponding adjusting member 58 to move away from the elastic member 4 and compressing the air on the other side of the adjusting member 58. During the movement of the adjusting member 58 away from the elastic member 4, the corresponding blocking ring 59 is driven to release the blocking of the multiple corresponding heat dissipation grooves 57, so that the multiple heat dissipation grooves 57 can be connected to the corresponding multiple flow grooves 55. At this time, one end of the heat dissipation cavity 7 can be connected to the external air, and preliminary cooling can be achieved. When the multiple conductors 1 are working, the heat will enter the insulation cavity 6 and can enter the heat dissipation cavity 7 through the first spiral groove 21 for cooling. At the same time, the temperature entering the insulation cavity 6 will enter the first heat conduction groove 52 and transfer the temperature to the corresponding sealing groove 5 through the first heat conduction groove 52, causing the thermal expansion material in the corresponding sealing groove 5 of the first heat conduction groove 52 to expand, thereby pushing the corresponding adjustment member 58 to move in the direction away from the elastic member 4 and compressing the air on the other side of the adjustment member 58. During the movement of the adjustment member 58 in the direction away from the elastic member 4, the corresponding sealing ring 59 will be driven to release the blockage of the multiple corresponding heat dissipation grooves 57, so that the multiple heat dissipation grooves 57 can be connected with the corresponding multiple circulation grooves 55. At this time, both ends of the heat dissipation cavity 7 can be connected with the external air, so that the air can circulate in the heat dissipation cavity 7, further improving the cooling effect and accelerating the heat dissipation of the conductor 1.

[0037] When the temperature inside the cable is higher than the temperature outside the cable, refer to Figure 6 , the expansion degree of the thermal expansion material corresponding to the position of the first heat-conducting groove 52 will be greater than the expansion degree of the thermal expansion material corresponding to the position of the second heat-conducting groove 53. At this time, the thermal expansion material corresponding to the position of the first heat-conducting groove 52 will push the sliding plate 51 and the elastic member 4 to move toward the direction of the second heat-conducting groove 53. The elastic member 4 will gradually release the blockage of the second spiral groove 31 during the movement, so that the insulation chamber 6, the heat dissipation chamber 7 and the insulation chamber 8 can be interconnected. At this time, the heat in the insulation chamber 6 can be transferred to the insulation chamber 8, so that the higher temperature inside the cable can be mixed with the lower temperature in the insulation chamber 8, further improving the cooling effect and performing rapid cooling; When the temperature inside the cable returns to normal or is lower than the temperature outside the cable, the elastic member 4 returns to its initial position and re-blocks the second spiral groove 31 to prevent external heat higher than the operating temperature of the conductor 1 from entering the cable.

[0038] When the cable is exposed to extremely cold temperatures, the temperature entering the insulation cavity 8 and the second heat-conducting groove 53 is unable to expand the thermal expansion material in the corresponding sealing groove 5. The sliding plate 51, under the action of the air on the other side, drives the sealing ring 59 to seal the multiple heat dissipation grooves 57, so that the corresponding end of the heat dissipation cavity 7 cannot communicate with the outside air, preventing the extremely cold temperature from directly entering the cable. At this time, the temperature of the conductor 1 during operation will enter the insulation cavity 6 and enter the heat dissipation cavity 7 through the first spiral groove 21. When the temperature inside the insulation cavity 6 and the heat dissipation cavity 7 is too high, the temperature inside the insulation cavity 6 will be transmitted to the corresponding sealing groove 5 through the first heat conducting groove 52, causing the corresponding thermal expansion material to expand, pushing the corresponding adjusting member 58 to drive the sealing ring 59 to release the blockage of multiple corresponding heat dissipation grooves 57, so that one end of the heat dissipation cavity 7 can be connected to the outside air for cooling. When the temperature inside the insulation cavity 6 returns to the normal operating temperature, the thermal expansion material in the sealing groove 5 corresponding to the first heat conducting groove 52 recovers and no longer expands. The compressed air on the corresponding side of the adjusting member 58 will push the adjusting member 58 back to drive the sealing ring 59 to return to the initial position, and re-block the corresponding multiple heat dissipation grooves 57, so that both ends of the heat dissipation cavity 7 cannot be connected to the outside air, preventing external cold air from entering the cable, which can better insulate the inside of the cable and avoid direct temperature loss.

[0039] It should be noted that the reference Figure 5 The thermal expansion material will expand according to the temperature conditions. On the one hand, when the temperature is high, it can push the adjusting member 58 to drive the sealing ring 59 to move farther away from the heat dissipation groove 57, so that the connection area between the heat dissipation groove 57 and the circulation groove 55 increases, and the temperature can be cooled faster. On the other hand, when the temperature is low, it can push the adjusting member 58 to drive the sealing ring 59 to move closer to the heat dissipation groove 57, so that the connection area between the heat dissipation groove 57 and the circulation groove 55 decreases, which can prevent excessive entry of extremely cold air from the outside and better keep warm. Therefore, the heat dissipation effect and the heat preservation effect can be adaptively adjusted according to the internal temperature of the cable to prevent the cable temperature from being too high or too low.

[0040] To sum up, through the arrangement of the insulation chamber 6, the heat dissipation chamber 7 and the insulation chamber 8 and other structures, on the one hand, the cooling mode can be adjusted according to the temperature conditions inside and outside the cable, the cooling effect can be improved, the temperature inside the cable can be prevented from being too high, the cable transmission efficiency and the overall life of the cable can be improved; on the other hand, the connecting area between the heat dissipation groove 57 and the circulation groove 55 can be adjusted according to the temperature conditions inside the cable, which can avoid excessive entry of extremely cold air from the outside and better insulation, thereby adaptively adjusting the heat dissipation effect and the insulation effect according to the temperature conditions inside the cable to avoid the cable temperature being too high or too low.

[0041] Finally: 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 scope of protection of the present invention.

Claims

1. A power generation cable comprising a conductor, an insulating layer, a filling layer, a shielding layer, an inner sheath and an outer sheath, characterized in that: A heat preservation layer and a heat insulating layer are sequentially provided between the outer sheath and the inner sheath, forming a heat preservation cavity, a heat dissipation cavity and a heat insulating cavity from the inside to the outside; the heat dissipation cavity is connected to the heat preservation cavity and the heat insulating cavity respectively through a spiral groove; It also includes a flow regulating component, which includes a sealing groove, an adjusting member and a sealing ring. The adjusting member drives the sealing ring to move based on the expansion and contraction of the thermal expansion material to achieve heat exchange control between the heat dissipation cavity and the outside world.

2. The power generation cable according to claim 1, characterized in that: The thermal insulation layer is provided with a first spiral groove, and the heat insulation layer is provided with a second spiral groove. The first spiral groove and the second spiral groove are staggered. The heat dissipation cavity is connected with the thermal insulation cavity through the first spiral groove and is connected with the thermal insulation cavity through the second spiral groove.

3. The power generation cable according to claim 2, characterized in that: A spiral elastic member is provided in the heat dissipation cavity. The width of the elastic member is greater than the width of the first spiral groove and the second spiral groove. In the initial state, the elastic member covers the second spiral groove to block the communication between the temperature insulation cavity and the heat dissipation cavity.

4. The power generation cable according to claim 3, characterized in that: Both ends of the elastic member are connected to a sliding plate, and the two sliding plates are respectively slidably arranged in the two sealing grooves at both ends of the outer sheath. Both sealing grooves are provided with thermal expansion material. The thermal expansion material pushes the corresponding sliding plate to move due to thermal expansion, so as to drive the elastic member to release the blockage of the second spiral groove.

5. The power generation cable according to claim 4, characterized in that: The thermal insulation layer and the heat insulating layer are respectively provided with a first heat conducting groove and a second heat conducting groove. The first heat conducting groove and the second heat conducting groove are configured to transfer the heat of the thermal insulation cavity and the heat insulating cavity to the corresponding sealing groove to trigger the expansion of the thermal expansion material and drive the adjustment member and the sealing ring to adjust the opening of the heat dissipation channel.

6. The power generation cable according to claim 5, characterized in that: The sealing ring is fixedly connected to the adjusting member, and the sealing ring is slidably arranged in the adjusting grooves at both ends of the outer sleeve. Both ends of the outer sleeve are respectively provided with a heat dissipation groove connected to the heat dissipation cavity and a flow groove connected to the outside on both sides corresponding to the adjusting groove.

7. The power generation cable according to claim 6, characterized in that: The moving direction of the adjusting member is parallel to the moving direction of the sliding plate. When the thermal expansion material expands, it pushes the adjusting member to compress the gas in the sealing groove, so that the sealing ring is away from the heat dissipation groove to increase the opening of the heat dissipation channel.

8. The power generation cable according to claim 7, characterized in that: A limiting block is provided in the sealing groove for limiting the displacement of the sliding plate to ensure that the initial position of the elastic member covers the second spiral groove.

9. The power generation cable according to claim 8, characterized in that: Support bars are provided in both the heat preservation layer and the thermal insulation layer, and the support bars pass through the first spiral groove and the second spiral groove to enhance structural strength.

10. The power generation cable according to claim 9, characterized in that: The outer sheath is a multi-section structure, and two adjacent sections of the outer sheath are connected to each other through the corresponding flow grooves.

Images