Power cable and method for producing the same

Abstract

The application discloses a kind of electric power cable and method, it is related to electric power cable technical field.A kind of electric power cable, including wire core, further including the pipe of wire that is set in the outer wall of wire core, the outer wall of the pipe is equipped with circumferentially distributed protruding portion, the protruding portion is strip-shaped, and parallel with wire core, recess is formed between adjacent protruding portion;The application can significantly increase the heat dissipation area of cable, directly improve the heat dissipation efficiency of cable, and when multiple parallel laying, protruding and recess can be accurately interlocked, so that cable arrangement is stable and regular, conducive to large-scale installation, optimize structure to improve the overall strength and anti-pollution capacity of cable, prolong service life.

Description

Technical Field

[0001] This invention belongs to the field of power cable technology, and more specifically, relates to a power cable. Background Technology

[0002] Power cables are specialized conductors used for transmitting and distributing electrical energy. They are typically laid underground, in tunnels, or underwater, forming the indispensable "blood vessels" of the power grid. Compared to overhead lines, power cables have significant advantages such as smaller footprint, immunity to external climate conditions, high power supply reliability, and safety and aesthetics. Therefore, they are widely used in urban power grids, industrial and mining enterprises, major facilities, and power transmission in densely populated areas.

[0003] Existing conventional power cables mainly consist of an inner conductive metal core and an outer insulating sheath (plastic tubing). The core function of the outer plastic tubing (such as polyethylene or polyvinyl chloride) is electrical insulation, ensuring that current flows safely within the core. However, when the cable operates under high load and high current conditions, the core generates a large amount of heat due to its resistance. At this time, due to the circular tubing structure and the poor thermal conductivity of the plastic material itself, the heat encounters significant obstacles in its dissipation to the surrounding environment, causing heat to accumulate inside the cable. This bottleneck of limited heat dissipation indirectly leads to an increase in insulation temperature and accelerated aging, thereby reducing the cable's current carrying capacity and service life, and may even cause safety hazards. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a power cable that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A power cable includes a conductor and a conduit sleeved on the outer wall of the conductor. The outer wall of the conduit has circumferentially distributed protrusions. The protrusions are elongated and parallel to the conductor, and grooves are formed between adjacent protrusions.

[0007] To improve the strength of the conduit, preferably, the connection between the protrusion and the groove is provided with an arc-shaped chamfer.

[0008] A method for producing a power cable includes the following steps:

[0009] S1. The wire core is drawn using a wire drawing machine;

[0010] S2. A tube with protrusions is extruded from the outer wall of the wire core using an extrusion equipment;

[0011] S3. Cooling and shaping of the conduit is achieved using cooling equipment;

[0012] S4. Use testing equipment to detect the outer diameter and core eccentricity of the cable;

[0013] S5. The cable is wound up using a winding device.

[0014] To facilitate heat dissipation from the conduit, the cooling device further includes a strip-shaped water tank, an arc-shaped horizontal pipe connected inside the strip-shaped water tank, a drain hole at the upper end of the arc-shaped horizontal pipe, a circulation pump installed inside the strip-shaped water tank, a flexible hose connected to the output end of the circulation pump, the flexible hose being connected to the arc-shaped horizontal pipe, and the input end of the circulation pump extending to the bottom of the inner side of the strip-shaped water tank.

[0015] To facilitate the recovery of some of the water vapor generated during the cooling process, an inverted U-shaped baffle is further slidably installed at the upper port of the strip-shaped water tank, and a lifting part is provided on the strip-shaped water tank to drive the inverted U-shaped baffle to rise and fall.

[0016] To further improve the efficiency of water vapor recovery, the lifting unit includes a motor mounted on a strip-shaped water tank. A turntable is mounted on the output shaft of the motor, and an eccentrically positioned push rod is rotatably connected to the turntable. The other end of the push rod is rotatably connected to the top of an inverted U-shaped baffle.

[0017] To further enhance the support effect and heat dissipation efficiency of the conduit, the axial cross-section of the arc-shaped horizontal tube is U-shaped, and the drainage holes are distributed on the concave surface of the arc-shaped horizontal tube in an arc-shaped path. The arc-shaped horizontal tube is connected to the inverted U-shaped baffle through a connecting plate.

[0018] To further improve the heat dissipation efficiency of the cable in the strip water tank, C-shaped pipes are connected to both sides of the strip water tank. The upper end of the C-shaped pipe is connected to the upper end of the strip water tank, and the lower end of the C-shaped pipe is connected to the input end of the circulation pump through a connecting pipe.

[0019] To facilitate heat dissipation from the cooling water, the C-shaped tube has multiple equally spaced grooves on its sidewall. These grooves are not connected to the inner cavity of the C-shaped tube, and a fan facing the grooves is installed on the outer wall of the C-shaped tube.

[0020] To enable automatic cleaning of the inner wall of the strip groove, the inverted U-shaped baffle is further equipped with connecting frames on both sides, and a scraper connected to the connecting frames is provided inside the strip groove.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] 1. This invention significantly increases the heat dissipation area by setting axial protrusions and grooves on the outer wall of the cable conduit, directly improving the heat dissipation efficiency of the cable. When multiple cables are laid side by side, the protrusions and grooves can be precisely interlocked, making the cable arrangement stable and neat, which is conducive to large-scale installation, optimizes the structure, improves the overall strength and anti-pollution ability of the cable, and extends its service life.

[0023] 2. This invention uses an arc-shaped horizontal pipe to spray water from bottom to top, which continuously lifts the cable immersed in the cooling water tank with water, effectively counteracting the cable's own weight tension. This makes the incompletely shaped conduit less prone to deformation during cooling, ensuring the roundness of the product. At the same time, the water flow causes the cable to sway slightly and regularly in the water, improving the heat exchange efficiency between the cooling medium and the surface of the conduit.

[0024] 3. This invention features a liftable inverted U-shaped baffle above the water tank, which allows rising water vapor to condense and be recovered upon contact with the baffle, reducing cooling water loss. The motor drives the baffle to move up and down reciprocally, which on the one hand stirs the airflow and increases the frequency of contact between water vapor and the cold plate to improve condensation efficiency, and on the other hand makes the condensate drip down quickly, accelerating the recovery process and maintaining the water balance of the cooling system.

[0025] 4. This invention uses an arc-shaped horizontal tube that rises and falls synchronously with the baffle to create a dynamic lifting force, which causes the cable to sway up and down in the water. The swaying expands the water spray coverage area on the one hand, and on the other hand, when the horizontal tube approaches the water surface, the water spray velocity from the drain hole increases, creating a higher kinetic energy impact cooling effect, thereby comprehensively improving the heat dissipation uniformity and cooling intensity of the cable conduit.

[0026] 5. This invention uses a circulating pump to draw return water heated by a cable from a C-shaped tube. As the water flows through the C-shaped tube, a fan provides forced air cooling to its outer wall and the strip groove, achieving secondary cooling of the coolant and ensuring continuous and efficient heat dissipation. At the same time, a scraper moves up and down with the baffle to remove dust from the strip groove, keeping the outer wall of the C-shaped tube clean and ensuring long-term stable heat dissipation efficiency.

[0027] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0028] In the attached diagram:

[0029] Figure 1 This is a three-dimensional structural diagram of a power cable proposed in this invention;

[0030] Figure 2 This is a schematic diagram of the structure of a power cable in a multi-strand combination state proposed in this invention;

[0031] Figure 3 This is a schematic diagram of a cooling device used in the production of a power cable.

[0032] Figure 4This is a partial structural diagram of the cooling equipment;

[0033] Figure 5 A schematic diagram of the C-shaped tube structure of the cooling equipment;

[0034] Figure 6 A schematic diagram of the strip-shaped horizontal pipe structure of the cooling equipment;

[0035] Figure 7 This is a partial exploded view of the cooling equipment.

[0036] In the diagram: 1. Core wire; 2. Conduit; 3. Protrusion; 4. Groove; 5. Chamfered corner; 6. Strip water trough; 7. Arc-shaped horizontal pipe; 8. Drain hole; 9. Circulating pump; 10. Columnar horizontal pipe; 11. Flexible hose; 12. Branch pipe; 13. C-shaped pipe; 14. Motor; 15. Turntable; 16. Push rod; 17. Inverted U-shaped baffle; 18. Connecting plate; 19. Strip groove; 20. Fan; 21. Scraper; 22. Connecting frame; 23. Connecting pipe; 24. Stirring rod; 25. U-shaped dividing plate. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] Example 1: Refer to Figures 1-2 A power cable includes a metal core 1, the material of which can be selected as needed, such as copper or aluminum. It also includes a conduit 2 sleeved on the outer wall of the core 1, the material of which is polyvinyl chloride, polyethylene or modified polypropylene, etc. The outer wall of the conduit 2 is provided with circumferentially distributed protrusions 3, the protrusions 3 are elongated and parallel to the core 1, and the axial cross-sectional shape of the protrusions 3 is semi-circular, triangular or trapezoidal, and a groove 4 is formed between adjacent protrusions 3.

[0039] Specifically, due to the design of the protrusion 3, the heat dissipation surface area of ​​the conduit 2 is effectively increased, thereby significantly improving the heat dissipation efficiency of the cable in high-temperature environments. In addition, when multiple cables are laid side by side, the protrusion 3 of adjacent conduits 2 can be precisely embedded into the groove 4 of another conduit 2. This interlocking structure makes the connection and arrangement of cables more stable and orderly.

[0040] The connection between the protrusion 3 and the groove 4 is provided with an arc-shaped chamfer 5. The arc-shaped chamfer 5 allows for a better transition between the protrusion 3 and the groove 4, improving their integration and ensuring the heat dissipation efficiency, strength, and anti-fouling ability of the conduit 2.

[0041] Example 2: Refer to Figures 1-7As shown, a method for producing a power cable includes the following steps:

[0042] S1. The wire core 1 is drawn by a wire drawing machine to draw the wire core 1 to a suitable diameter;

[0043] S2. Add the raw material into the extrusion equipment, and then extrude the wire tube 2 with protrusions 3 through the extrusion equipment on the outer wall of the wire core 1.

[0044] S3. Cooling and shaping of conduit 2 is completed using cooling equipment;

[0045] S4. Use testing equipment to check the eccentricity between the outer diameter of the cable and the core 1.

[0046] S5. The cable is wound up using a winding device, or multiple cables are twisted together using a stranding device.

[0047] Example 3: Reference Figures 3-7 As shown, a method for producing a power cable is basically the same as in Example 2, but further discloses a specific implementation scheme for a cooling device:

[0048] The aforementioned cooling equipment includes a strip-shaped water tank 6 for storing cooling water. The upper end of the strip-shaped water tank 6 has an opening, and the two sides are the inlet and outlet, respectively. An arc-shaped horizontal pipe 7 is connected inside the strip-shaped water tank 6. The curvature of the arc-shaped horizontal pipe 7 is close to the curvature of the cable when it passes through the strip-shaped water tank 6. The upper end of the arc-shaped horizontal pipe 7 has a drain hole 8 for continuously discharging cooling water. A circulating pump 9 for drawing cooling water is installed inside the strip-shaped water tank 6. The output end of the circulating pump 9 is connected to a hose 11, which is connected to the arc-shaped horizontal pipe 7. The input end of the circulating pump 9 extends to the inner bottom of the strip-shaped water tank 6.

[0049] Specifically, when cooling of the cable conduit 2 is required, the cable is immersed in the cooling water in the strip-shaped water tank 6 in a slightly bent shape. Then, the circulation pump 9 is started to pump the cooling water through the hose 11 to the arc-shaped horizontal pipe 7. The arc-shaped horizontal pipe 7 sprays water upwards onto the cable. The resulting upward flow of cooling water can form a continuous lifting force under the cable. This design brings dual benefits: first, the lifting force effectively offsets part of the downward pull generated by the cable's own weight, making the conduit 2, which is not yet fully shaped, less prone to deformation due to stress during the cooling process; second, the upward water flow promotes slight shaking of the cable in the tank, enhancing the heat exchange between the cooling medium and the surface of the conduit 2, thereby further improving the overall heat dissipation efficiency.

[0050] In practice, the strip water tank 6 is also equipped with a water supply pipe (not shown in the figure) for continuously replenishing cooling water, which is used to replenish the coolant in the strip water tank 6 in a timely manner.

[0051] Example 4: Reference Figures 3-4As shown, a method for producing a power cable is basically the same as in Example 3, but with a further specific implementation scheme for collecting water vapor:

[0052] The upper end of the strip-shaped water tank 6 is longitudinally slidably equipped with an inverted U-shaped baffle 17. The inverted U-shaped baffle 17 is made of stainless steel or copper. The strip-shaped water tank 6 is provided with a lifting part for driving the inverted U-shaped baffle 17 to rise and fall. The lifting part includes a motor 14 installed on the strip-shaped water tank 6. A turntable 15 is installed on the output shaft of the motor 14. An eccentrically set push rod 16 is rotatably connected to the turntable 15. The other end of the push rod 16 is rotatably connected to the top of the inverted U-shaped baffle 17.

[0053] When cooling of the cable conduit 2 is required, the cable is immersed in the cooling water in the strip-shaped water tank 6 with a slight bend. Then, the circulation pump 9 is started to pump the cooling water through the hose 11 to the arc-shaped horizontal pipe 7. The arc-shaped horizontal pipe 7 sprays water upwards onto the cable. The resulting upward flow of cooling water can create a continuous lifting force under the cable. This design brings dual benefits: First, the lifting force effectively offsets part of the downward pull generated by the cable's own weight, making the conduit 2, which is not yet fully shaped, less prone to deformation due to stress during the cooling process; Second, the upward water flow promotes slight shaking of the cable in the tank, enhancing the heat exchange between the cooling medium and the surface of the conduit 2, thereby further improving the overall heat dissipation efficiency.

[0054] During the cooling process, the water vapor generated in the strip-shaped water tank 6 rises and flows over the lower surface of the inverted U-shaped baffle 17. Some of the water vapor is pre-cooled and liquefied here, and the condensate flows down the surface of the baffle back into the water tank, realizing the recycling of cooling water. At the same time, the motor 14 drives the turntable 15 to rotate continuously. The turntable 15 drives the inverted U-shaped baffle 17 to move up and down reciprocally through the push rod 16 (forming a crank-slider mechanism). This reciprocating motion has a dual function: first, it can actively agitate the airflow and increase the contact frequency between water vapor and the surface of the low-temperature baffle, thereby improving the condensation efficiency; second, it can make the condensate attached to the baffle drip back into the strip-shaped water tank 6 more smoothly and quickly, accelerating the water recycling process.

[0055] Reference Figure 6 As shown, the axial cross-section of the arc-shaped horizontal tube 7 is U-shaped or C-shaped, and the opening is set upward. The drainage holes 8 are distributed on the concave surface of the arc-shaped horizontal tube 7 in an arc-shaped path. The arc-shaped horizontal tube 7 is connected to the inverted U-shaped baffle 17 through the connecting plate 18.

[0056] When cooling of the cable conduit 2 is required, the cable is immersed in the cooling water in the strip-shaped water tank 6 with a slight bend. Then, the circulation pump 9 is started to pump the cooling water through the hose 11 to the arc-shaped horizontal pipe 7. The arc-shaped horizontal pipe 7 sprays water upwards onto the cable. The resulting upward flow of cooling water can create a continuous lifting force under the cable. This design brings dual benefits: First, the lifting force effectively offsets part of the downward pull generated by the cable's own weight, making the conduit 2, which is not yet fully shaped, less prone to deformation due to stress during the cooling process; Second, the upward water flow promotes slight shaking of the cable in the tank, enhancing the heat exchange between the cooling medium and the surface of the conduit 2, thereby further improving the overall heat dissipation efficiency.

[0057] Therefore, during the cooling process, multiple drain holes 8 can provide more comprehensive and uniform support for the cable. At the same time, the reciprocating inverted U-shaped baffle 17 drives the arc-shaped horizontal pipe 7 to rise and fall synchronously through the connecting plate 18. This causes the arc-shaped horizontal pipe 7 to generate a dynamic lifting force on the cable, causing the cable to sway up and down regularly in the water. This swaying process brings two optimization effects: on the one hand, it expands the coverage of the water jet from the drain holes 8, making the contact between the cooling medium and the surface of the cable 2 more sufficient; on the other hand, when the arc-shaped horizontal pipe 7 rises to near the water surface, the water jet from the drain holes 8 on both sides gains greater flow velocity and kinetic energy because it is closer to the water surface, further enhancing the impact cooling effect on the cable. Under the combined effect, the overall heat dissipation and cooling efficiency of the cable are significantly improved.

[0058] In practice, in order to improve the condensation efficiency of the inverted U-shaped baffle 17, multiple U-shaped partition plates 25 with equal spacing can be set on the lower end face of the inverted U-shaped baffle 17, and the U-shaped partition plates 25 are integrally formed with the inverted U-shaped baffle 17 to increase the condensation area of ​​the inverted U-shaped baffle 17 and reduce the escape of water vapor in the strip water tank 6.

[0059] Example 5: Refer to Figures 3-7 As shown, a method for producing a power cable is basically the same as in Example 4, but with a further specific implementation scheme to improve the cooling efficiency of the conduit 2:

[0060] Both sides of the aforementioned strip-shaped water tank 6 are connected to C-shaped pipes 13. The C-shaped pipes 13 are made of copper or stainless steel, which have good thermal conductivity. The upper end of the C-shaped pipe 13 is connected to the upper end of the strip-shaped water tank 6, and the upper end of the C-shaped pipe 13 is basically flush with the water level of the strip-shaped water tank 6. The lower end of the C-shaped pipe 13 is connected to the input end of the circulating pump 9 through a connecting pipe 23. The side wall of the C-shaped pipe 13 is provided with multiple equally spaced strip grooves 19. The strip grooves 19 are not connected to the inner cavity of the C-shaped pipe 13. A fan 20 is installed on the outer wall of the C-shaped pipe 13 facing the strip grooves 19. The cooperation between the C-shaped pipe 13 and the fan 20 is used to realize the heat dissipation of the cooling water.

[0061] When cooling of the cable conduit 2 is required, the cable is immersed in the cooling water in the strip-shaped water tank 6 with a slight bend. Then, the circulation pump 9 is started to pump the cooling water through the hose 11 to the arc-shaped horizontal pipe 7. The arc-shaped horizontal pipe 7 sprays water upwards onto the cable. The resulting upward flow of cooling water can create a continuous lifting force under the cable. This design brings dual benefits: First, the lifting force effectively offsets part of the downward pull generated by the cable's own weight, making the conduit 2, which is not yet fully shaped, less prone to deformation due to stress during the cooling process; Second, the upward water flow promotes slight shaking of the cable in the tank, enhancing the heat exchange between the cooling medium and the surface of the conduit 2, thereby further improving the overall heat dissipation efficiency.

[0062] During the cooling process, the circulating pump 9 draws cooling water from the C-shaped tube 13 through the connecting pipe 23. The C-shaped tube 13 then continuously draws cooling water that has been heated by the cable (i.e., return water after one heat dissipation) from the upper layer of the strip water tank 6 through its upper port. When this return water flows through the inside of the C-shaped tube 13, the fan 20 continuously blows the cooling airflow towards the C-shaped tube 13 and the strip tank 19 area, thereby performing secondary heat dissipation and cooling on the C-shaped tube 13 and the cooling water inside it. This design effectively reduces the temperature of the circulating coolant, ensuring that it has a stable and efficient heat dissipation capacity when used for cable cooling again, thus ensuring the continuous and efficient operation of the cable cooling system.

[0063] Reference Figure 6 As shown, the output end of the hose 11 is connected to a cylindrical horizontal tube 10. The upper end of the cylindrical horizontal tube 10 is connected to the arc-shaped horizontal tube 7 through multiple equally spaced branch tubes 12. The number of branch tubes 12 is 6 to 25, and the appropriate number and diameter are selected according to the actual needs. At this time, the branch tubes 12 can make the coolant enter the arc-shaped horizontal tube 7 more evenly. The outer wall of the cylindrical horizontal tube 10 is connected to multiple horizontally arranged stirring rods 24. The number of stirring rods 24 is close to the number of branch tubes 12, and the two are perpendicular to each other.

[0064] When the arc-shaped horizontal tube 7 rises and falls, it also drives the stirring rod 24 to rise and fall in the coolant through the columnar horizontal tube 10. The stirring rod 24 can repeatedly stir the cooling water in the strip water tank 6, which can make the water temperature in the strip water tank 6 more uniform and indirectly ensure the heat dissipation efficiency of the conduit 2.

[0065] Reference Figure 5 and Figure 7 As shown, both sides of the inverted U-shaped baffle 17 are connected to a connecting frame 22. The strip groove 19 is provided with a scraper 21 connected to the connecting frame 22. The surface of the scraper 21 that contacts the strip groove 19 is provided with a cleaning brush (not shown in the figure).

[0066] During the lifting and lowering of the inverted U-shaped baffle 17, the scraper 21 will also be driven to lift and lower synchronously through the connecting frame 22. The scraper 21 will scrape off the dust in the strip groove 19, so that the C-shaped tube 13 can maintain heat dissipation efficiency.

[0067] In this invention, when cooling the cable, the cable is immersed in the cooling water in the strip-shaped water tank 6 in a moderately bent shape. Then, the circulation pump 9 is started to pump the cooling water through the hose 11 to the arc-shaped horizontal pipe 7. The arc-shaped horizontal pipe 7 sprays water upwards onto the cable. The resulting upward flow of cooling water can form a continuous lifting force under the cable. This design brings dual benefits: first, the lifting force effectively offsets part of the downward pull generated by the cable's own weight, making the not-yet-fully-shaped conduit 2 less prone to deformation due to stress during the cooling process; second, the upward water flow promotes slight shaking of the cable in the tank, enhancing the heat exchange between the cooling medium and the surface of the conduit 2, thereby further improving the overall heat dissipation efficiency.

[0068] During the cooling process described above, the water vapor generated in the strip-shaped water tank 6 rises and flows over the lower surface of the inverted U-shaped baffle 17. Some of the water vapor is pre-cooled and liquefied here, and the condensate flows down the surface of the baffle back into the water tank, realizing the recycling of cooling water. At the same time, the motor 14 drives the turntable 15 to rotate continuously. The turntable 15 drives the inverted U-shaped baffle 17 to move up and down reciprocally through the push rod 16 (forming a crank-slider mechanism). This reciprocating motion has a dual function: first, it can actively agitate the airflow and increase the contact frequency between water vapor and the surface of the low-temperature baffle, thereby improving the condensation efficiency; second, it can make the condensate attached to the baffle drip back into the strip-shaped water tank 6 more smoothly and quickly, accelerating the water recycling process.

[0069] Because multiple drainage holes 8 can provide more comprehensive and uniform support for the cable, and the reciprocating inverted U-shaped baffle 17 drives the arc-shaped horizontal pipe 7 to rise and fall synchronously through the connecting plate 18, the arc-shaped horizontal pipe 7 generates a dynamic lifting force on the cable, causing the cable to sway up and down regularly in the water. This swaying process brings two optimization effects: on the one hand, it expands the coverage of the water jet from the drainage holes 8, making the contact between the cooling medium and the surface of the cable pipe 2 more sufficient; on the other hand, when the arc-shaped horizontal pipe 7 rises to near the water surface, the water jet from the drainage holes 8 on both sides gains greater flow velocity and kinetic energy because it is closer to the water surface, further enhancing the impact cooling effect on the cable. Under the combined effect, the overall heat dissipation and cooling efficiency of the cable are significantly improved.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been described above with reference to preferred embodiments, it is not intended to limit the present invention. Any modifications or alterations made by those skilled in the art without departing from the scope of the present invention using the above-described technical content can be considered equivalent embodiments with equivalent variations. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A power cable comprising a core (1), characterized in that, It also includes a tube (2) sleeved on the outer wall of the core (1). The outer wall of the tube (2) is provided with circumferentially distributed protrusions (3). The protrusions (3) are elongated and parallel to the core (1). A groove (4) is formed between adjacent protrusions (3).

2. The power cable according to claim 1, characterized in that, The connection between the protrusion (3) and the groove (4) is provided with an arc-shaped chamfer (5).

3. A method for producing a power cable, characterized in that, The application of the power cable according to claim 2 includes the following steps: S1. The wire core (1) is drawn by a wire drawing machine; S2. A conduit (2) with protrusions (3) is extruded from the outer wall of the core (1) using an extrusion equipment. S3. Cooling and shaping of the conduit (2) is completed by using a cooling device; S4. Detect the eccentricity of the cable's outer diameter and core (1) using testing equipment; S5. The cable is wound up using a winding device.

4. A method for producing a power cable according to claim 3, characterized in that, The cooling device includes a strip-shaped water tank (6), an arc-shaped horizontal pipe (7) connected inside the strip-shaped water tank (6), a drain hole (8) at the upper end of the arc-shaped horizontal pipe (7), a circulation pump (9) installed inside the strip-shaped water tank (6), a hose (11) connected to the output end of the circulation pump (9), the hose (11) connected to the arc-shaped horizontal pipe (7), and the input end of the circulation pump (9) extending to the inner bottom of the strip-shaped water tank (6).

5. A method for producing a power cable according to claim 4, characterized in that, The upper end of the strip water tank (6) is longitudinally slidably equipped with an inverted U-shaped baffle (17), and the strip water tank (6) is provided with a lifting part for driving the inverted U-shaped baffle (17) to rise and fall.

6. A method for producing a power cable according to claim 5, characterized in that, The lifting unit includes a motor (14) mounted on a strip-shaped water tank (6), a turntable (15) mounted on the output shaft of the motor (14), an eccentrically connected push rod (16) rotatably connected to the turntable (15), and the other end of the push rod (16) rotatably connected to the top of an inverted U-shaped baffle (17).

7. A method for producing a power cable according to claim 5, characterized in that, The arc-shaped horizontal tube (7) has a U-shaped axial section, and the drainage holes (8) are distributed on the concave surface of the arc-shaped horizontal tube (7) in an arc-shaped path. The arc-shaped horizontal tube (7) is connected to the inverted U-shaped baffle (17) through the connecting plate (18).

8. A method for producing a power cable according to claim 5, characterized in that, Both sides of the strip water tank (6) are connected to C-shaped pipes (13). The upper end of the C-shaped pipe (13) is connected to the upper end of the strip water tank (6), and the lower end of the C-shaped pipe (13) is connected to the input end of the circulation pump (9) through a connecting pipe (23).

9. A method for producing a power cable according to claim 8, characterized in that, The C-shaped tube (13) has a plurality of equally spaced strip grooves (19) on its side wall. The strip grooves (19) are not connected to the inner cavity of the C-shaped tube (13). A fan (20) facing the strip grooves (19) is installed on the outer wall of the C-shaped tube (13).

10. A method for producing a power cable according to claim 9, characterized in that, Both sides of the inverted U-shaped baffle (17) are connected to a connecting frame (22), and a scraper (21) connected to the connecting frame (22) is provided in the strip groove (19).

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