Manufacturing device and manufacturing method of cooling type direct current charging pile cable

Abstract

The application relates to the technical field of cable manufacturing, in particular to a manufacturing device and a manufacturing method of a cooling type direct current charging pile cable, wherein the manufacturing device comprises an inner cylinder cooling water tank, the inner cylinder cooling water tank comprises a water tank body, a cooling cylinder assembly installed in the water tank body and a circulating cooling assembly, the cooling cylinder assembly comprises a main cooling cylinder, a flow guide cylinder, a flow increasing cylinder and a guide-out cylinder are rotationally connected on the main cooling cylinder in sequence along a cooling water flow direction; the application enables low-temperature cooling water to enter the main cooling cylinder to efficiently cool the cable main body inside the main cooling cylinder, enables the low-temperature cooling water flowing into the water tank body to directly act on the cable main body, improves the cooling efficiency of the cooling water input in the circulating water inlet pipe, and improves the utilization efficiency of the low-temperature cooling water by arranging the flow guide cylinder, the flow increasing cylinder and the guide-out cylinder, so that the cooling efficiency of the cable main body is improved.

Description

Technical Field

[0001] This invention relates to the field of cable manufacturing technology, and in particular to a manufacturing apparatus and method for a cooled DC charging pile cable. Background Technology

[0002] With the development of modern industry and the increasing severity of environmental problems, new energy electric vehicles are gaining wider acceptance and are being promoted worldwide. The power source for these vehicles is the battery, and the battery capacity and charging time are key indicators for evaluating their performance. Currently, new energy electric vehicles are generally charged at DC charging stations, which can achieve high charging power. The DC charging station and the electric vehicle are connected via connectors and charging cables. When the cable carries a certain load current, the conductor generates heat, causing the cable to overheat and limiting the current it can carry. Therefore, cables with cooling functions are used to effectively control heat accumulation during charging and improve charging efficiency.

[0003] For example, Chinese invention patent CN119811772A discloses a liquid-cooled supercharging cable and its manufacturing process, including an inner cooling pipe with two main cores arranged side by side inside. An outer cooling pipe is spirally wrapped around the inner cooling pipe, and an outer sheath is extruded around the outer cooling pipe. A ground wire, a control wire group, and a signal wire group are provided between the outer cooling pipe and the outer sheath. The outer cooling pipe and the inner cooling pipe are connected at the charging gun end of the cable. The liquid cooling medium flows unidirectionally in the inner and outer cooling pipes, which can improve the insufficient heat dissipation of existing supercharging pile charging cables. Similarly, in the manufacturing of cooled DC charging pile cables, Chinese invention patent CN120108862A discloses a liquid-cooled charging... The cable manufacturing process and equipment include a base, a water outlet tank, and a drying chamber, as well as working components. These components include a water outlet fan, a drying device, an air outlet frame, an air inlet frame, quick-release guide wheels, and adjusting components. The water outlet fan is fixedly installed on one side of the water outlet tank, the drying device is installed on one side of the drying chamber, the air outlet frame is installed on the top of the drying chamber, the air inlet frame is installed on the bottom of the drying chamber, and the quick-release guide wheels are installed inside both the water outlet tank and the drying chamber. The adjusting components are connected to the drying chamber and are used to adjust the cable drying distance within the drying chamber. This allows for adjustments to the cable drying process based on actual conditions, and the segmented drying of the cable further enhances the drying efficiency during processing, thereby achieving rapid drying of the surface of the produced liquid-cooled cable piles.

[0004] When the above scheme is implemented, the cable is extruded through the die head of the extruder during production and needs to be cooled and shaped to prevent deformation due to gravity. The cooling method is usually water cooling. By adding circulating cooling water to the cooling water tank, the extruded cable is cooled and shaped by the circulating water. In order to improve the cooling efficiency of the cable and control the water temperature, the cooling water is usually circulated and cooled through a circulating cooling component. The low temperature cooling water input into the cooling water tank will mix with the original cooling water, causing the temperature of the cooling water input into the cooling water tank to gradually rise before it comes into contact with the cable, making it difficult for it to directly act on the cable and reducing the cooling effect of the cooling water. Summary of the Invention

[0005] Based on this, it is necessary to provide a manufacturing device and method for a cooling DC charging pile cable to address the above-mentioned technical problems. This solves the problem that in the prior art, the cooling water is circulated and cooled by a circulating cooling component. However, the low-temperature cooling water input into the cooling water tank mixes with the original cooling water, causing the temperature of the cooling water input into the cooling water tank to gradually rise before it comes into contact with the cable. This makes it difficult for the cooling water to directly act on the cable, thus reducing the cooling effect of the cooling water.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A manufacturing apparatus for a cooled DC charging pile cable includes an inner cooling water tank. The inner cooling water tank includes a tank body, a cooling cylinder assembly installed in the tank body, and a circulating cooling assembly. The input end of the circulating cooling assembly is connected to the inner cavity of the tank body, and the output end of the circulating cooling assembly is connected to the inner cavity of the cooling cylinder assembly through a circulating water inlet pipe. The cooling cylinder assembly includes a main cooling cylinder. A guide cylinder, a booster cylinder, and an outlet cylinder are rotatably connected to the main cooling cylinder in sequence along the cooling water flow direction. The guide cylinder has an inner flow hole inclined towards the inner cavity of the main cooling cylinder. An inner impeller is installed on the inner wall of the booster cylinder, and an outer impeller is installed on the outer wall of the booster cylinder. The outlet cylinder has an outer flow hole inclined towards the outside of the main cooling cylinder.

[0008] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, a filtration chamber is provided at one end of the water tank body. A filter screen plate is rotatably connected to the inner cavity of the filtration chamber. The outer wall of the filter screen plate is in contact with the inner wall of the filtration chamber. A purification chamber is provided below the filter screen plate in the inner cavity of the filtration chamber. A drain pipe is connected to one end of the filtration chamber in the purification chamber. A filtered water outlet pipe is connected to the other end of the filtration chamber in the purification chamber. The other end of the filtered water outlet pipe is connected to the water tank body through a circulating cooling component. The filtration chamber is located at the cable input end of the water tank body. A filtration chamber is formed in the middle of the filtration chamber. The inner cavity of the water tank body is connected to the filtration chamber.

[0009] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, the filter plate is a horizontally arranged cylindrical structure, the top of the filter plate is an open structure, the middle of the filter plate is fixed with a drive shaft that is rotatably connected to the filtration chamber, and a pressure sensor is installed at the connection between the filter plate and the drive shaft.

[0010] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, a baffle is provided at the connection between the sewage pipe and the filtration chamber, and a support spring is installed at the end of the baffle away from the filtration chamber.

[0011] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, the input end of the circulating cooling component is connected to a circulating water outlet pipe, which is connected to a filter water outlet pipe and a secondary water outlet pipe respectively through a three-way pipe. The secondary water outlet pipe is connected to the inner cavity of the water tank body. The output end of the circulating cooling component is connected to a circulating water inlet pipe, which is connected to the end of the water tank body away from the filtration chamber. A secondary pipe solenoid valve is installed between the secondary water outlet pipe and the circulating water outlet pipe, and a filter pipe solenoid valve is installed between the filter water outlet pipe and the circulating water outlet pipe.

[0012] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, a drive motor is installed on the water tank body, the output shaft of the drive motor is connected to the drive shaft, the filtered water outlet pipe is connected to a pressure boosting cylinder, a piston plate is slidably connected to the inner cavity of the pressure boosting cylinder, the end of the drive shaft is threadedly connected to the piston plate through a screw, and a pressure relief solenoid valve is installed between the pressure boosting cylinder and the filter plate.

[0013] In a preferred embodiment of the manufacturing apparatus for a cooling type DC charging pile cable provided by the present invention, an automatic impurity separator is provided on the circulating cooling component, and an automatic filtration and cleaning system is mounted on the automatic impurity separator. The automatic filtration and cleaning system includes a main control module, which is signal-connected to a circulation switching module, a filtration judgment module, and a self-cleaning module. The circulation switching module is signal-connected to the secondary pipe solenoid valve and the filter pipe solenoid valve, respectively. The filtration judgment module is signal-connected to a pressure sensor, and the self-cleaning module is signal-connected to a drive motor and a pressure relief solenoid valve, respectively.

[0014] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, a receiving plate is provided at the bottom of the purification chamber, and a pressure sensor two is installed at the bottom of the receiving plate. The filter judgment module is signal-connected to the pressure sensor two.

[0015] In a preferred embodiment of the manufacturing apparatus for a cooling DC charging pile cable provided by the present invention, a plurality of pressure rollers are rotatably connected in the water tank body, and the cable body passes through the bottom of the pressure rollers.

[0016] This invention also provides a method for manufacturing a cooled DC charging pile cable, using the aforementioned apparatus for manufacturing a cooled DC charging pile cable, comprising the following steps:

[0017] S1. Stranded conductor: Multiple single wires are twisted together and wrapped around the outside of the liquid cooling pipe, then compressed to reduce the cable size and form a stranded conductor.

[0018] S2. Insulation Extrusion: The stranded wires are wrapped with an insulation layer using an extruder to form the cable body;

[0019] S3, Cooling and Forming: The cable body is cooled and formed by the inner cylinder cooling water tank. The inner cylinder cooling water tank efficiently cools and forms the cable body that enters it.

[0020] S4. Drying and Packaging: The cooled and formed cable body is dried, and the dried cable body is wound up and transferred to the storage warehouse for storage.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a manufacturing apparatus and method for a cooling type DC charging pile cable. When cooling the cable body with cooling water, the lower temperature cooling water enters the main cooling cylinder to efficiently cool the cable body inside. This allows the low-temperature cooling water flowing into the water tank to directly act on the cable body, improving the cooling efficiency of the cooling water input in the circulating water inlet pipe. When the cooling water flows rapidly through the guide cylinder, it drives the external cooling water to enter the guide cylinder through the inner flow hole, thus recycling the low-temperature cooling water. The cooling water in the main cooling cylinder drives the flow booster cylinder to rotate through the inner impeller, thereby driving the outer impeller to rotate and pushing the cooling water in the water tank towards the outlet cylinder, accelerating the circulation of the cooling water. The cooling water entering the outlet cylinder is discharged through the outer flow hole and enters the water tank, improving the utilization efficiency of the low-temperature cooling water and thus improving the cooling efficiency of the cable body.

[0023] 2. The present invention provides a manufacturing apparatus and method for a cooling type DC charging pile cable. Impurities are filtered through a filter screen in a filtration chamber. The purification chamber contains filtered, clean cooling water. By controlling the filter screen to flip and closing the connection between the filtered water outlet pipe and the circulating cooling assembly, the filter screen's opening faces downwards. Since the filtration chamber is closed, the water inside does not flow, allowing impurities on the filter screen to fall to the purification chamber by gravity. The drain pipe is opened to discharge the impurities from the purification chamber. Simultaneously, water from the water tank flows into the filtration chamber, backwashing the filter screen and cleaning it. This reduces manual maintenance costs. Regular automatic cleaning ensures the cleanliness of the cooling water, preventing any impact on the produced cables.

[0024] 3. The present invention provides a manufacturing device and method for a cooling DC charging pile cable. When a pressure sensor determines that there are many impurities filtered on the filter screen, the drive motor is controlled to rotate the active shaft, thereby controlling the filter screen opening to face downwards. At this time, the active shaft drives the screw to rotate and pushes the piston plate to move. The piston plate compresses the inner cavity of the pressure boosting cylinder, forming a high-pressure state. Impurities on the filter screen gradually fall into the purification chamber. At this time, the pressure relief solenoid valve is opened, and the high-pressure gas in the pressure boosting cylinder is quickly injected into the purification chamber of the filtration treatment chamber, thereby instantly increasing the water pressure in the purification chamber. The increased water pressure can generate a pushing force on the baffle. This pushing force is greater than the elastic force of the supporting spring, thereby pushing the baffle open, allowing the cooling water and impurities to be quickly discharged through the drain pipe, realizing automatic cleaning and impurity removal, and improving cleaning efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 is a flowchart of the manufacturing method provided by the present invention;

[0027] Figure 2 is a schematic diagram of the overall structure of the inner cylinder cooling water tank provided by the present invention.

[0028] Figure 3 is a schematic diagram of the overall structure of the inner cylinder cooling water tank provided by the present invention.

[0029] Figure 4 is a schematic diagram showing the location of the filtration chamber and cooling cylinder assembly in the water tank body provided by the present invention.

[0030] Figure 5 is a schematic diagram of the cooling cylinder assembly structure in the water tank body provided by the present invention;

[0031] Figure 6 is a cross-sectional view of the cooling cylinder assembly provided by the present invention.

[0032] Figure 7 is a schematic diagram of the structure of the filter screen plate with the opening facing upward in the filtration chamber provided by the present invention;

[0033] Figure 8 is a schematic diagram of the structure of the filter screen plate with the opening facing downward in the filtration chamber provided by the present invention.

[0034] Figure 9 is a schematic diagram of the control principle of the automatic filter plate cleaning system provided by the present invention.

[0035] Figure 10 is a schematic diagram of the detection cylinder and pressurizing cylinder structure provided by the present invention;

[0036] Figure 11 is a cross-sectional view of the filtration chamber provided by the present invention.

[0037] The markings in the diagram are explained as follows:

[0038] 1. Water tank body; 2. Filtration chamber; 3. Cooling cylinder assembly; 301. Main cooling cylinder; 302. Flow guide cylinder; 303. Flow booster cylinder; 304. Outlet cylinder; 305. Internal flow hole; 306. External impeller; 307. Internal impeller; 308. External flow hole; 4. Automatic impurity separator; 5. Circulating water outlet pipe; 6. Filter water outlet pipe; 7. Auxiliary water outlet pipe; 8. Circulating water inlet pipe; 9. Sewage pipe; 10. Auxiliary pipe solenoid valve; 11. Drive motor; 12. Filter tube solenoid valve; 13. Pressure booster cylinder; 14. Pressure relief solenoid valve; 15. Filtration chamber; 16. Filter screen plate; 17. Drive shaft; 18. Purification chamber; 19. Piston plate; 20. Baffle; 21. Receiving plate; 22. Pressure sensor two; 23. Pressure sensor one; 24. Circulating cooling assembly. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0040] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the embodiments of the present invention can be combined with each other.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] Example 1

[0043] Please refer to Figures 2-6. This invention provides a manufacturing apparatus for a cooled DC charging pile cable, including an inner cylinder cooling water tank. The inner cylinder cooling water tank includes a tank body 1, a cooling cylinder assembly 3 installed in the tank body 1, and a circulating cooling assembly 24. The input end of the circulating cooling assembly 24 is connected to the inner cavity of the tank body 1, and the output end of the circulating cooling assembly 24 is connected to the inner cavity of the cooling cylinder assembly 3 through a circulating water inlet pipe 8. The cooling cylinder assembly 3 includes a main cooling cylinder 301. A guide cylinder 302, a booster cylinder 303, and an outlet cylinder 304 are rotatably connected to the main cooling cylinder 301 in sequence along the cooling water flow direction. The guide cylinder 302 has an inner flow hole 305 inclined towards the inner cavity of the main cooling cylinder 301. An inner impeller 307 is installed on the inner wall of the booster cylinder 303. The outer wall of the booster cylinder 303... An external impeller 306 is installed, and an external flow hole 308 inclined towards the outside of the main cooling cylinder 301 is opened on the outlet cylinder 304. The cable body enters from the end of the main cooling cylinder 301 near the outlet cylinder 304 and exits through the end near the guide cylinder 302. The circulating cooling assembly 24 inputs cooling water into the main cooling cylinder 301 through the circulating water inlet pipe 8 and gradually flows towards the outlet cylinder 304. When the cable body is cooled by the cooling water, the lower temperature cooling water enters the main cooling cylinder 301 to efficiently cool the cable body inside. This allows the low temperature cooling water flowing into the water tank body 1 to directly act on the cable body, making it less likely for the cooling water input by the circulating water inlet pipe 8 to mix with the cooling water remaining in the water tank body 1, thereby improving the cooling efficiency of the cooling water input by the circulating water inlet pipe 8.

[0044] In addition, the cooling water gradually flows towards the outlet cylinder 304, making the water temperature in the outlet cylinder 304 higher than that in the guide cylinder 302, thus achieving the purpose of stepped cooling. Furthermore, the cooling water temperature in the water tank body 1 near the guide cylinder 302 is lower than that in the outlet cylinder 304. Therefore, when the cooling water flows rapidly through the guide cylinder 302, it drives the external cooling water to enter the guide cylinder 302 through the inner flow hole 305, thus recycling the low-temperature cooling water. The cooling water in the main cooling cylinder 301 drives the flow booster cylinder 303 to rotate through the inner impeller 307. The movement drives the external impeller 306 to rotate, pushing the cooling water in the water tank body 1 toward the outlet cylinder 304, accelerating the circulation of the cooling water. The cooling water entering the outlet cylinder 304 is discharged through the external flow hole 308 and enters the water tank body 1. After the cooling water is cooled by the operation of the circulating cooling component 24, it is input into the main cooling cylinder 301 through the circulating water inlet pipe 8, realizing the effect of circulating cooling, improving the utilization efficiency of low temperature cooling water, and thus improving the cooling efficiency of the cable body.

[0045] Please refer to Figure 2. A filtration chamber 2 is located at one end of the water tank body 1. A filter screen plate 16 is rotatably connected to the inner cavity of the filtration chamber 2. The outer wall of the filter screen plate 16 is fitted against the inner wall of the filtration chamber 2. A purification chamber 18 is located below the filter screen plate 16 within the inner cavity of the filtration chamber 2. A drain pipe 9 is connected to one end of the filtration chamber 2 located in the purification chamber 18, and a filtered water outlet pipe 6 is connected to the other end of the filtration chamber 2 located in the purification chamber 18. The other end of the filtered water outlet pipe 6 is connected to the water tank body 1 via a circulating cooling assembly 24. Cooling water is injected into the water tank body 1. The cable body passes through the water tank body 1 and is cooled and shaped by the cooling water. The circulating cooling assembly 24... 4. Cooling water in the water tank body 1 is drawn into it through the filter outlet pipe 6. After being cooled by the circulating cooling component 24, the cooling water is reinjected into the water tank body 1 to circulate and cool the cable body passing through the water tank body 1. In addition, the circulating cooling component 24 is a prior art device for water circulation cooling. It uses a semiconductor cooling chip or compressor to cool the input water and then uses a water pump to reinject the cooled water into the water tank body 1 for the purpose of circulating and cooling the water. This is prior art well known to those in the art and is not within the scope of protection of this application. Its specific structure and working principle will not be described in detail in this application.

[0046] Through the above structural design, the circulating cooling assembly 24 draws water from the water tank body 1 to the filtration chamber 2, where it is filtered by the filter screen plate 16. The filtered impurities are located on the upper part of the filter screen plate 16. The purification chamber 18 contains the filtered clean cooling water, which is then fed into the circulating cooling assembly 24 through the filter outlet pipe 6 for circulating cooling. When it is necessary to clean the impurities filtered on the filter screen plate 16, the connection between the filter outlet pipe 6 and the circulating cooling assembly 24 is closed. By controlling the filter screen plate 16 to rotate 180 degrees, the opening of the filter screen plate 16 faces downwards. Since the filtration chamber 2 is in a closed state, its interior... Since the water body does not flow, the impurities on the filter screen 16 fall to the purification chamber 18 by gravity. At this time, the impurities in the purification chamber 18 are discharged by controlling the opening of the drain pipe 9. When the drain pipe 9 is opened, the water in the water tank body 1 flows to the filtration chamber 2 to backwash the filter screen 16. The filter screen 16 can be washed and cleaned simultaneously. The filter screen 16 is reset and the filter outlet pipe 6 is opened to recirculate the filtration process, thereby reducing manual maintenance costs. Regular automatic cleaning ensures the cleanliness of the cooling water and avoids affecting the produced cables.

[0047] Additionally, please refer to Figures 2-4. The filtration chamber 2 is located at the cable input end of the water tank body 1. A filtration cavity 15 is provided in the middle of the filtration chamber 2. The inner cavity of the water tank body 1 is connected to the filtration cavity 15. The cable body moves from the filtration chamber 2 to the other end of the water tank body 1. Cooling water flows from the other end of the water tank body 1 to the filtration chamber 2, forming a relative flow with the cable body, which better cools the cable body.

[0048] It is worth mentioning that, as shown in Figures 5-8, the filter plate 16 has a horizontally arranged cylindrical structure. The top of the filter plate 16 is an open structure. A drive shaft 17, which is rotatably connected to the filtration chamber 2, is fixed in the middle of the filter plate 16. A pressure sensor 23 is installed at the connection between the filter plate 16 and the drive shaft 17. The drive shaft 17 drives the filter plate 16 to rotate, thereby controlling whether the opening of the filter plate 16 is upward or downward. As shown in Figure 7, when the opening of the filter plate 16 is upward, it is in the filtration state. As shown in Figure 8, when the opening of the filter plate 16 is downward, it is in the self-cleaning state. This achieves automatic control of the filter plate 16 in different states. By setting the pressure sensor 23, after impurities are gradually filtered by the filter plate 16, the filter plate 16 is subjected to pressure. As the impact force of the water flow gradually increases, it acts on the pressure sensor 23. By judging the pressure value detected by the pressure sensor 23, it is easy to judge the amount of impurities filtered on the filter plate 16, which facilitates cleaning. In addition, as shown in Figure 11, a stopper 20 is provided at the connection between the drain pipe 9 and the filter treatment chamber 2. A support spring is installed at the end of the stopper 20 away from the filter treatment chamber 2. The support spring pushes the stopper 20 to block the connection between the drain pipe 9 and the filter treatment chamber 2. When the filter plate 16 is in the filtration state, the flow of cooling water to the drain pipe 9 is restricted. When the filter plate 16 is in the self-cleaning state, the stopper 20 is released from the blockage of the drain pipe 9, so that the cooling water carries the impurities out together, which facilitates the slag removal process.

[0049] In this embodiment, referring to Figures 2 and 3, the input end of the circulating cooling assembly 24 is connected to a circulating water outlet pipe 5. The circulating water outlet pipe 5 is connected to the filter water outlet pipe 6 and the auxiliary water outlet pipe 7 via a three-way pipe. The auxiliary water outlet pipe 7 is connected to the inner cavity of the water tank body 1. The output end of the circulating cooling assembly 24 is connected to a circulating water inlet pipe 8. The circulating water inlet pipe 8 is connected to the end of the water tank body 1 away from the filtration chamber 2. A secondary pipe solenoid valve 10 is installed between the auxiliary water outlet pipe 7 and the circulating water outlet pipe 5. A filter pipe solenoid valve 12 is installed between the filter water outlet pipe 6 and the circulating water outlet pipe 5. When the filter screen plate 16 is open and facing upwards, it is in the filtration state. At this time, the secondary pipe solenoid valve 10 is in the closed state. When the solenoid valve 12 is open, the filtered cooling water in the filtration chamber 2 flows through the filter outlet pipe 6 to the circulation outlet pipe 5, and is then input into the water tank body 1 through the circulation cooling assembly 24 and the circulation inlet pipe 8 to form a circulation filtration cooling. When the filter screen plate 16 is in the self-cleaning state with its opening facing downward, the secondary solenoid valve 10 is opened and the filter tube solenoid valve 12 is closed. The circulation cooling assembly 24 draws the cooling water in the water tank body 1 into the water tank body 1 through the secondary outlet pipe 7 and the circulation outlet pipe 5, and discharges it through the circulation inlet pipe 8 for circulation cooling. At this time, the cooling water in the filtration chamber 2 is relatively still, which facilitates the self-cleaning of impurities filtered by the filtration chamber 2.

[0050] To improve self-cleaning efficiency, please refer to Figures 10 and 11. A drive motor 11 is installed on the water tank body 1. The output shaft of the drive motor 11 is connected to the drive shaft 17. The filtered water outlet pipe 6 is connected to a pressure booster cylinder 13. A piston plate 19 is slidably connected to the inner cavity of the pressure booster cylinder 13. The end of the drive shaft 17 is threadedly connected to the piston plate 19 via a screw. A pressure relief solenoid valve 14 is installed between the pressure booster cylinder 13 and the filter screen 16. When the pressure sensor 23 determines that there are many impurities filtered on the filter screen 16, the drive motor 11 is controlled to rotate, thereby controlling the opening of the filter screen 16 to face downwards. At this time, the drive shaft 17 rotates downwards. 7 drives the screw to rotate and pushes the piston plate 19 to move. The piston plate 19 compresses the inner cavity of the booster cylinder 13 to form a high-pressure state. Impurities on the filter screen plate 16 gradually fall into the purification chamber 18. At this time, by controlling the pressure relief solenoid valve 14 to open, the high-pressure gas in the booster cylinder 13 is quickly injected into the purification chamber 18 of the filtration treatment chamber 2, thereby instantly increasing the water pressure in the purification chamber 18. The increased water pressure can generate a pushing force on the baffle 20. This pushing force is greater than the elastic force of the supporting spring, thereby pushing the baffle 20 open, so that the cooling water and impurities are quickly discharged through the drain pipe 9, realizing the automatic cleaning and impurity removal work and improving the cleaning efficiency.

[0051] Preferably, multiple pressure rollers are rotatably connected in the water tank body 1, and the cable body passes through the bottom of the pressure rollers. The multiple pressure rollers limit the cable body, so that the cable body can be immersed in the cooling water and fully contact the cooling water.

[0052] Example 2

[0053] The manufacturing apparatus for a cooling DC charging pile cable provided in Embodiment 1 is further optimized. Unlike Embodiment 1, as shown in Figures 1 and 9, an automatic impurity separator 4 is installed on the circulating cooling assembly 24. The automatic impurity separator 4 is equipped with an automatic filtration and cleaning system. The automatic filtration and cleaning system includes a main control module, which is signal-connected to a cycle switching module, a filtration judgment module, and a self-cleaning module. The cycle switching module is signal-connected to the secondary pipe solenoid valve 10 and the filter pipe solenoid valve 12, respectively. The filtration judgment module is signal-connected to the pressure sensor 23, and the self-cleaning module is signal-connected to the drive motor 11 and the pressure relief valve 23, respectively. The solenoid valve 14 is connected to the signal. When the cable body is being circulated and cooled, the main control module sends a filtering and cooling signal to the circulation switching module. The circulation switching module controls the circulation cooling component 24 to work, the secondary pipe solenoid valve 10 to close, and the filter pipe solenoid valve 12 to open. At the same time, the filter screen 16 is in the open-facing position. After being filtered by the filter screen 16, the cooling water enters the circulation cooling component 24 through the filter outlet pipe 6 and the circulation outlet pipe 5 for circulation cooling. During this process, the pressure sensor 23 sends the real-time detected pressure value to the filtration judgment module. The filtration judgment module compares the pressure value fed back by the pressure sensor 23 with the preset pressure. The pressure threshold (the maximum pressure value of pressure sensor 23 when the impurities filtered by filter plate 16 exceed its filtration capacity, preset in the filtration judgment module) is compared. When the pressure value fed back by pressure sensor 23 reaches the preset pressure threshold, it is determined that there are too many impurities on filter plate 16, requiring self-cleaning. The filtration judgment module feeds back the judgment result to the main control module. The main control module sends a self-cleaning signal to the cycle switching module and the self-cleaning module. The cycle switching module controls the secondary pipe solenoid valve 10 to open and the filter pipe solenoid valve 12 to close. The self-cleaning module controls the drive motor 11 to work and the pressure relief solenoid valve 14 to close. The drive motor 11 controls the filter screen 16 to rotate 180 degrees, and impurities gradually fall into the purification chamber 18. After a preset time, the self-cleaning module controls the pressure relief solenoid valve 14 to open. At this time, high-pressure water flows into the purification chamber 18 and discharges the impurities through the drain pipe 9. After the impurity discharge is completed, the main control module sends a filtration cooling signal to the circulation switching module and the self-cleaning module. At this time, the drive motor 11 controls the filter screen 16 to reverse and reset, the secondary pipe solenoid valve 10 closes and the filter tube solenoid valve 12 opens. The cooling water is filtered by the filter screen 16 and enters the circulating cooling assembly 24 through the filter outlet pipe 6 and the circulating outlet pipe 5 for circulating cooling.

[0054] It is worth mentioning that, in order to facilitate the detection of the state of impurities falling into the purification chamber 18 during the self-cleaning process, please refer to Figure 11. A receiving plate 21 is provided at the bottom of the purification chamber 18, and a pressure sensor 22 is installed at the bottom of the receiving plate 21. The filter judgment module is connected to the pressure sensor 22. When the opening of the filter plate 16 is facing downward, the filtered impurities gradually fall into the purification chamber 18 under the action of gravity and fall onto the receiving plate 21. At this time, the pressure sensor 22 detects an increase in weight data and sends the weight data to the filter judgment module. When the weight data sent by the pressure sensor 22 gradually increases and remains constant, the filter judgment module gives a judgment that the impurities have completely fallen into the purification chamber 18 and feeds back to the main control module. The main control module sends a self-cleaning signal to the circulation switching module and the self-cleaning module, so that the impurities can be completely discharged through the drain pipe 9 by rinsing the purification chamber 18, improving the cleaning effect, realizing automatic judgment of the state of filtered impurities falling into the purification chamber 18, and timely cleaning of impurities, realizing automated and intelligent filtration and self-cleaning effects, and reducing the manual maintenance cycle.

[0055] Please refer to Figure 1. The present invention also provides a method for manufacturing a cooled DC charging pile cable, comprising the following steps:

[0056] S1. Stranded conductor: Multiple single wires are twisted together and wrapped around the outside of the liquid cooling pipe, then compressed to reduce the cable size and form a stranded conductor.

[0057] S2. Insulation Extrusion: The stranded wires are wrapped with an insulation layer using an extruder to form the cable body;

[0058] S3, Cooling and Forming: The cable body is cooled and formed by the inner cylinder cooling water tank. The inner cylinder cooling water tank efficiently cools and forms the cable body that enters it.

[0059] S4. Drying and Packaging: The cooled and formed cable body is dried, and the dried cable body is wound up and transferred to the storage warehouse for storage; the above steps produce a cooled DC charging pile cable. During the production process, the cable body is cooled and formed by the inner cylinder cooling water tank, and the inner cylinder cooling water tank can improve the utilization efficiency of low temperature cooling water, thereby improving the cooling efficiency of the cable body.

Claims

1. A manufacturing apparatus for a cooled DC charging pile cable, characterized in that, The system includes an inner cylinder cooling water tank, which comprises a tank body (1), a cooling cylinder assembly (3) installed in the tank body (1), and a circulating cooling assembly (24). The input end of the circulating cooling assembly (24) is connected to the inner cavity of the tank body (1), and the output end of the circulating cooling assembly (24) is connected to the inner cavity of the cooling cylinder assembly (3) through a circulating water inlet pipe (8). The cooling cylinder assembly (3) includes a main cooling cylinder (301), and the main cooling cylinder (301) has a cooling cylinder along its upper edge. The flow direction of the cooling water is sequentially connected by a guide tube (302), a booster tube (303), and an outlet tube (304). The guide tube (302) has an inner flow hole (305) that is inclined toward the inner cavity of the main cooling cylinder (301). The inner wall of the booster tube (303) is equipped with an inner impeller (307), and the outer wall of the booster tube (303) is equipped with an outer impeller (306). The outlet tube (304) has an outer flow hole (308) that is inclined toward the outside of the main cooling cylinder (301). A filtration chamber (2) is provided at one end of the water tank body (1). A filter screen plate (16) is rotatably connected to the inner cavity of the filtration chamber (2). The outer wall of the filter screen plate (16) is in contact with the inner wall of the filtration chamber (2). A purification chamber (18) is provided below the filter screen plate (16) in the inner cavity of the filtration chamber (2). A drain pipe (9) is connected to one end of the filtration chamber (2) in the purification chamber (18). A filter outlet pipe (6) is connected to the other end of the filtration chamber (2) in the purification chamber (18). The other end of the filter outlet pipe (6) is connected to the water tank body (1) through a circulating cooling assembly (24). The filtration chamber (2) is located in the water tank body. The cable body input end of the body (1) is provided with a filter treatment chamber (15) in the middle of the filter treatment chamber (2), and the inner cavity of the water tank body (1) is connected to the filter treatment chamber (15); the filter screen plate (16) is a horizontally arranged cylindrical structure, the top of the filter screen plate (16) is an open structure, the middle of the filter screen plate (16) is fixed with an active shaft (17) that is rotatably connected to the filter treatment chamber (2), and a pressure sensor (23) is installed at the connection between the filter screen plate (16) and the active shaft (17); a baffle (20) is provided at the connection between the sewage pipe (9) and the filter treatment chamber (2), and a support spring is installed at the end of the baffle (20) away from the filter treatment chamber (2).

2. The manufacturing apparatus for a cooled DC charging pile cable according to claim 1, characterized in that, The input end of the circulating cooling component (24) is connected to the circulating water outlet pipe (5). The circulating water outlet pipe (5) is connected to the filter water outlet pipe (6) and the auxiliary water outlet pipe (7) respectively through a three-way pipe. The auxiliary water outlet pipe (7) is connected to the inner cavity of the water tank body (1). The output end of the circulating cooling component (24) is connected to the circulating water inlet pipe (8). The circulating water inlet pipe (8) is connected to the end of the water tank body (1) away from the filtration chamber (2). A secondary pipe solenoid valve (10) is installed between the auxiliary water outlet pipe (7) and the circulating water outlet pipe (5). A filter pipe solenoid valve (12) is installed between the filter water outlet pipe (6) and the circulating water outlet pipe (5).

3. The manufacturing apparatus for a cooled DC charging pile cable according to claim 2, characterized in that, A drive motor (11) is installed on the water tank body (1). The output shaft of the drive motor (11) is connected to the drive shaft (17). The filter outlet pipe (6) is connected to a pressure booster cylinder (13). A piston plate (19) is slidably connected to the inner cavity of the pressure booster cylinder (13). The end of the drive shaft (17) is threadedly connected to the piston plate (19) through a screw. A pressure relief solenoid valve (14) is installed between the pressure booster cylinder (13) and the filter screen plate (16).

4. The manufacturing apparatus for a cooled DC charging pile cable according to claim 3, characterized in that, The circulating cooling assembly (24) is equipped with an automatic impurity separator (4), and the automatic impurity separator (4) is equipped with an automatic filtration and cleaning system. The automatic filtration and cleaning system includes a main control module. The main control module is connected to a circulation switching module, a filtration judgment module and a self-cleaning module. The circulation switching module is connected to the secondary pipe solenoid valve (10) and the filter pipe solenoid valve (12) respectively. The filtration judgment module is connected to the pressure sensor (23) respectively. The self-cleaning module is connected to the drive motor (11) and the pressure relief solenoid valve (14) respectively.

5. The manufacturing apparatus for a cooled DC charging pile cable according to claim 4, characterized in that, The bottom of the purification chamber (18) is provided with a support plate (21), and a pressure sensor (22) is installed at the bottom of the support plate (21). The filter judgment module is connected to the pressure sensor (22) via signal.

6. The manufacturing apparatus for a cooled DC charging pile cable according to claim 1, characterized in that, Multiple pressure rollers are rotatably connected in the water tank body (1), and the cable body passes through the bottom of the pressure rollers.

7. A method for manufacturing a cooled DC charging pile cable, characterized in that, The manufacturing apparatus for a cooling type DC charging pile cable as described in any one of claims 1-6 includes the following steps: S1. Stranded conductor: Multiple single wires are twisted together and wrapped around the outside of the liquid cooling pipe, then compressed to reduce the cable size and form a stranded conductor. S2. Insulation Extrusion: The stranded wires are wrapped with an insulation layer using an extruder to form the cable body; S3, Cooling and Forming: The cable body is cooled and formed by the inner cylinder cooling water tank. The inner cylinder cooling water tank efficiently cools and forms the cable body that enters it. S4. Drying and Packaging: The cooled and formed cable body is dried, and the dried cable body is wound up and transferred to the storage warehouse for storage.

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