A correction sealing structure of a liquid cooling gun head of a charging pile

Abstract

The application discloses a correction sealing structure of a charging pile liquid cooling gun head, which comprises a liquid cooling gun head shell, a charging end arranged at the front end of the liquid cooling gun head shell and two DC male heads connected with the liquid cooling electrode through sealing mechanisms. Each sealing mechanism comprises a sealing sleeve and a sealing connector. The liquid inlet end of each sealing sleeve is detachably connected with the liquid cooling cable of the liquid cooling electrode through the sealing connector. A correction sealer for preventing plugging alignment deviation is arranged on the charging end. The correction sealing structure of the charging pile liquid cooling gun head can quickly assemble the liquid cooling cable of the liquid cooling electrode and the sealing sleeve through the sealing mechanism. The assembled structure has a multi-stage sealing function, can well prevent the leakage of the cooling liquid, is convenient for replacement and maintenance in the later period, and plays the roles of correction, guidance and sealing through the correction sealer. When in use, the correction sealing structure can prevent the problems of radial deflection and sealing failure that are prone to occur when the gun head is plugged.

Description

Technical Field

[0001] This invention relates to the field of liquid-cooled charging guns, and more specifically, to a correction and sealing structure for the head of a liquid-cooled charging gun in a charging pile. Background Technology

[0002] Liquid-cooled charging guns are advanced charging devices used for high-power DC fast charging of new energy vehicles. Their core feature is active heat dissipation through a liquid circulation cooling system, allowing them to handle higher currents (such as 500A or even 1200A) while maintaining the cable's lightweight and flexible design, resulting in an efficient, safe, and fast charging experience. A sealed liquid circulation channel is integrated inside the charging gun and cable. During charging, the coolant (such as mineral oil, fluorinated liquid, or ethylene glycol solution) circulates under the drive of a power pump. The coolant flows through heat-generating parts (such as cable conductors and gun head connection points), absorbs heat, and then flows back to the external radiator. The external radiator dissipates the heat into the environment through air cooling or natural heat dissipation, forming a complete thermal management closed loop.

[0003] A search revealed Chinese patent application number "CN202320770589.8", which discloses a liquid-cooled charging gun head for new energy vehicles. The gun head includes: a national standard power interface, a DC male connector, a ground male connector, an adapter post, and a liquid-cooled cable. The national standard power interface is sequentially connected to the DC male connector, the adapter post, and the liquid-cooled cable. The national standard power interface also connects to the ground male connector. The gun head also includes a sealing sleeve, a two-way circuit, and a return pipe. The adapter post and the conductor connector of the liquid-cooled cable are riveted together by bolts and a stop block, serving to fix the wires and conduct electricity. The sealing sleeve covers the bolts and stop block, and the cooling oil in the liquid-cooled electrode flows through the two-way circuit to the return pipe. This liquid-cooled charging gun head features excellent liquid cooling performance.

[0004] However, existing technologies have the following problems during use: (1) When the gun head is plugged in, radial deviation, circumferential misalignment and axial push-off are very likely to occur. Forced plugging will cause the charging terminal to bend, and long-term use will directly lead to seal failure.

[0005] (2) The sealing of the liquid-cooled electrode of the liquid-cooled charging gun is prone to loosening and local compression is not tight, resulting in poor sealing performance, causing coolant leakage and water vapor to enter the insulation cavity, causing short circuit fault. Therefore, the present invention urgently needs to solve the problem of providing a correction and sealing structure for the liquid-cooled gun head of a charging pile, which can quickly assemble the liquid-cooled cable of the liquid-cooled electrode with the sealing sleeve through a sealing mechanism during use, and the assembled structure has a multi-level sealing function, which can effectively prevent coolant leakage, facilitate subsequent replacement and maintenance, and play a correcting, guiding and sealing role through a correction seal. During use, it can prevent problems such as radial deviation and sealing failure that are very easy to occur when the gun head is inserted. Summary of the Invention

[0006] In view of the above technical problems, the object of the present invention is to overcome the problems in the prior art that when the gun head is inserted, radial deviation, circumferential misalignment, and axial push deviation are extremely likely to occur. Forcible insertion will cause the charging terminal to bend, which will directly lead to seal failure after long-term use. The seal of the liquid-cooled electrode of the liquid-cooled charging gun is prone to looseness and incomplete local pressing, resulting in poor sealing performance, causing coolant leakage and water vapor intrusion into the insulation cavity, resulting in short-circuit faults. Therefore, a calibration and sealing structure for the gun head of a charging pile liquid-cooled gun is provided, which can quickly assemble the liquid-cooled cable of the liquid-cooled electrode with the sealing sleeve through a sealing mechanism during use, and the assembled structure has a multi-stage sealing function, which can well prevent coolant leakage, is also convenient for later replacement and maintenance, and plays a role in calibration, guiding and sealing through a calibration seal. When in use, it can prevent problems such as radial deviation and seal failure that are extremely likely to occur when the gun head is inserted.

[0007] To achieve the above object, the present invention provides a calibration and sealing structure for the gun head of a charging pile liquid-cooled gun, including: a liquid-cooled gun head housing, a charging end provided at the front end of the liquid-cooled gun head housing, and two DC male connectors provided in the charging end, partially passing through the interior of the liquid-cooled gun head housing and connected to the liquid-cooled electrode through a sealing mechanism; each of the sealing mechanisms includes: a sealing sleeve and a sealing connector; wherein, The end of the DC male connector is hermetically embedded inside the sealing sleeve. The liquid inlet end of each sealing sleeve is detachably connected to the liquid-cooled cable of the liquid-cooled electrode through a sealing connector, and each DC male connector is connected to the wire in the liquid-cooled cable through a adapter. The liquid outlet ends of the two sealing sleeves are detachably connected to a loop two-way pipe through a second connector. The loop two-way pipe is connected to an external cooling system through a return pipe, and a calibration seal is provided on the charging end to prevent alignment deviation during insertion.

[0008] Preferably, the sealing connector includes: a first connector, a second connector, and a first seal; wherein, The inner diameters of the sealing sleeve and the liquid-cooled cable are the same. The wall thickness of the sealing sleeve is greater than the wall thickness of the liquid-cooled cable. The end of the liquid-cooled cable adjacent to the sealing sleeve extends outward to form a limiting ring that can abut against the port of the sealing sleeve. A first seal with a "middle" - shaped cross-section and connected to its interior is coaxially sleeved between the end of the sealing sleeve and the adjacent end of the liquid-cooled cable, so that the adjacent ends of the sealing sleeve and the liquid-cooled cable abut against each other to squeeze the middle part of the first seal. The stepped first connector passes through the end of the liquid-cooled cable and is screwed onto the sealing sleeve until the end of the first connector can abut against the limiting ring of the liquid-cooled cable.

[0009] Preferably, a protrusion is formed on the outer wall of the sealing sleeve near the liquid-cooled cable, and the outer wall of the protrusion is provided with an external thread that mates with the internal thread on the inner wall of the first connector. A second sealing element is fitted at the contact point between the protrusion and the step on the inner wall of the first connector.

[0010] Preferably, a first threaded connector is fixedly provided at both ends of the two-way pipe, and a second threaded connector that mates with the two first threaded connectors is fixedly provided on the adjacent surfaces of the two sealing sleeves. Furthermore, a second connector that can be threadedly connected to the aligned first and second threaded connectors is movably sleeved at both ends of the two-way pipe.

[0011] Preferably, each of the first threaded connectors has at least one recessed portion at its port, and each of the second threaded connectors has a protruding portion at its port that can be inserted into the recessed portion of the corresponding first threaded connector.

[0012] Preferably, each of the ports of the second threaded connector is fitted with a No. 3 seal, and the No. 3 seal has a clearance hole for the protrusion to pass through.

[0013] Preferably, the calibration seal includes: a guide strip and a sealing cover; wherein, The inner wall of the charging end protrudes outward to form at least one guide strip, and the inner wall of the car charging port is recessed inward to form a guide groove that cooperates with the guide strip. The front end of the liquid cooling gun head housing is provided with a retractable sealing cover that can surround the charging end inside and can extend from the end of the charging end. An elastic element is sleeved on the shaft of the sealing cover. One end of the elastic element is fixed to the liquid cooling gun head housing, and the other end is fixed to the free end of the elastic element.

[0014] Preferably, the sealing cover is a corrugated flexible tube made of transparent material, and the elastic element is a spring.

[0015] According to the above technical solution, the beneficial effects of the correction and sealing structure for the liquid-cooled gun head of the charging pile provided by the present invention during use are as follows: (1) The present invention uses a sealing mechanism to quickly assemble and connect the liquid-cooled cable of the liquid-cooled electrode to the sealing sleeve. The assembled structure has excellent sealing performance and can play a multi-level sealing role to prevent coolant leakage during use. When the liquid-cooled electrode fails or ages after long-term use, the liquid-cooled electrode (i.e., the liquid-cooled cable of the liquid-cooled electrode) can be replaced quickly and conveniently, so as to facilitate the replacement and maintenance of the liquid-cooled electrode (liquid-cooled cable) in the future.

[0016] (2) When the charging end is inserted into the charging port of the car, the present invention plays a guiding and correcting role by correcting the sealing device so that the charging end of the hydraulic charging gun can be aligned with the charging port on the car, avoiding manual insertion and removal angle deviation, and radial deviation is very easy to occur when the gun head is inserted.

[0017] (3) The front end of the liquid-cooled gun head housing is fixed with a sealing cover that can extend and retract along the axial direction of the charging end by an elastic element, so as to play a sealing role. When the charging end is inserted into the charging port of the car, the sealing cover is pressed tightly against the charging port by the elastic element, so as to seal and surround the charging end, thereby playing a sealing role and preventing rain and snow from entering the charging port and the connection of the charging end in rainy or snowy weather, which may cause a short circuit.

[0018] In summary, this invention enables the liquid-cooled cable of the liquid-cooled electrode to be quickly assembled with the sealing sleeve through a sealing mechanism. The assembled structure has a multi-level sealing function, which can effectively prevent coolant leakage and facilitate subsequent replacement and maintenance. Furthermore, the calibrating sealer plays a role in correction, guidance, and sealing. During use, it can prevent problems such as radial deviation and sealing failure that are prone to occur when the gun head is inserted.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description section; and all parts not covered in the present invention are the same as or can be implemented using the prior art. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the correction and sealing structure of the liquid-cooled gun head of the charging pile provided in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the correction and sealing structure of the liquid-cooled gun head of the charging pile after removing the sealing cover, according to a preferred embodiment of the present invention. Figure 3 yes Figure 2 A partial internal structure diagram of the charging terminal; Figure 4 This is an exploded view of the cooling pipe and sealing sleeve of the correction and sealing structure of the liquid-cooled gun head of the charging pile provided in a preferred embodiment of the present invention. Figure 5 This is a cross-sectional view of the structure of the correction and sealing structure of the liquid-cooled gun head of the charging pile after the cooling pipe and the return pipe are assembled together, according to a preferred embodiment of the present invention. Figure 6This is a schematic diagram of the structure of the correction sealing structure of the liquid-cooled gun head of the charging pile after the return pipe and the cooling pipe are separated, according to a preferred embodiment of the present invention. Figure 7 This is a schematic diagram of the two-way pipe of the correction sealing structure circuit of the liquid-cooled gun head of the charging pile provided in a preferred embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures 1. Liquid-cooled nozzle housing; 2. Charging end; 21. DC male connector; 3. Sealing sleeve; 4. Liquid-cooled cable; 5. Two-way return pipe; 6. Return pipe; 7. Connector No. 1; 8. Connector No. 2; 9. Seal No. 1; 10. Seal No. 2; 11. Guide strip; 12. Sealing cover; 13. Elastic element; 14. First threaded connector; 15. Second threaded connector; 16. Protrusion; 17. Groove; 18. Seal No. 3. Detailed Implementation The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] like Figure 1-7 As shown, the present invention provides a calibration and sealing structure for a liquid-cooled charging gun head, comprising: a liquid-cooled gun head housing 1, a charging terminal 2 disposed at the front end of the liquid-cooled gun head housing 1, and two DC male connectors 21 disposed within the charging terminal 2 and partially passing through the interior of the liquid-cooled gun head housing 1 and connected to a liquid-cooled electrode via a sealing mechanism; each sealing mechanism comprises: a sealing sleeve 3 and a sealing connector; wherein, The end of the DC male connector 21 is sealed and embedded inside the sealing sleeve 3. The liquid inlet end of each sealing sleeve 3 is detachably connected to the liquid cooling cable 4 of the liquid-cooled electrode through a sealing connector. Each DC male connector 21 is connected to the wire in the liquid cooling cable 4 through an adapter. The liquid outlet ends of the two sealing sleeves 3 are detachably connected to the loop two-way pipe 5 through the second connector 8. The loop two-way pipe 5 is connected to the external cooling system through the return pipe 6. The charging end 2 is provided with a correction seal to prevent misalignment during insertion.

[0023] In the above scheme, the national standard power interface is connected in sequence to DC male connector 21, adapter post, and liquid-cooled electrode; the national standard power interface is also connected to the ground male connector (not shown in the figure).

[0024] The liquid-cooled cable 4 is existing technology. The liquid-cooled cable 4 comprises: a conductor or wire disposed within the liquid-cooled cable, an insulating protective layer surrounding the conductor or wire, and liquid-cooling channels formed by the gap between the insulating protective layer and the conductor (wire). These three components constitute the liquid-cooled electrode. (For the specific structure of the liquid-cooled cable and liquid-cooled electrode, please refer to Chinese Utility Model Patent CN202220833207.7, "A Flexible Liquid-Cooled Cable," which discloses a flexible liquid-cooled cable with an integrally formed structure featuring a bossed insulation layer. The bosses provide three-dimensional support for the conductor copper strands, and the multiple liquid-cooling channels formed between the bosses and the conductor copper strands allow the insulating cooling oil to directly and fully contact the conductor copper strands, rapidly carrying away the heat generated when the conductor copper strands are energized. The heat is then returned to the external cooling system via the return pipe 6 for heat dissipation, exhibiting highly efficient heat dissipation performance. The cooling system is existing common technology; therefore, its structure and operating principle will not be elaborated here.)

[0025] Operating principle: The coolant (insulating cooling oil) of the cooling system is introduced into the sealed sleeve 3 through the liquid-cooled cable 4 via an externally connected cooling system, allowing the coolant to make direct and full contact with the conductor copper stranded wire. This can quickly remove the heat generated when the conductor copper stranded wire is energized and flow into the circuit two-way pipe 5, and then return to the external cooling system through the return pipe 6 for heat dissipation.

[0026] The liquid-cooled cable 4 of the liquid-cooled electrode is quickly assembled and connected to the sealing sleeve 3 through a sealing mechanism. The assembled structure has excellent sealing performance, preventing coolant leakage during use.

[0027] When the liquid-cooled electrode malfunctions or ages after long-term use, it can be quickly and easily replaced (that is, the liquid-cooled cable 4 of the liquid-cooled electrode), so as to facilitate the replacement and maintenance of the liquid-cooled electrode (liquid-cooled cable 4) in the future.

[0028] In a preferred embodiment of the present invention, the sealing connector includes: a first connector 7, a second connector 8, and a first seal 9; wherein, The inner diameters of the sealing sleeve 3 and the liquid-cooled cable 4 are the same. The wall thickness of the sealing sleeve 3 is greater than that of the liquid-cooled cable 4. And the end of the liquid-cooled cable 4 adjacent to the sealing sleeve 3 extends outward to form a limiting ring that can abut against the port of the sealing sleeve 3. A first sealing member 9 with a "middle" - shaped cross-section and communicating with its interior is coaxially sleeved between the end of the sealing sleeve 3 and the adjacent end of the liquid-cooled cable 4, so that the adjacent ends of the sealing sleeve 3 and the liquid-cooled cable 4 abut against each other to squeeze the middle part of the first sealing member 9. The stepped first connecting member 7 passes through the end of the liquid-cooled cable 4 and is screwed onto the sealing sleeve 3 until the end of the first connecting member 7 can abut against the limiting ring of the liquid-cooled cable 4.

[0029] In the above solution, during assembly, the first sealing member 9 is coaxially sleeved between the sealing sleeve 3 and the liquid-cooled cable 4, and the first connecting member 7 sleeved on the end of the liquid-cooled cable 4 is rotated, so that the first connecting member 7 is threadedly connected to the sealing sleeve 3, and the first connecting member 7 is continuously rotated to make it advance along the axial direction of the sealing sleeve 3 until the end of the first connecting member 7 abuts the end of the liquid-cooled cable 4 against the end of the sealing sleeve 3 and squeezes the first sealing member 9 between the two. Thus, by the cooperation of the first connecting member 7 and the sealing sleeve 3, the liquid-cooled cable 4 is fixedly assembled in the sealing sleeve 3 and communicates with its interior for the conductor (guide) and the coolant to pass through. Among them, the conductor and the coolant in the liquid-cooled cable 4 are not drawn in the drawings.

[0030] Adopting the above connection method and the cooperation of the first sealing member 9, on the one hand, it is convenient to replace the liquid-cooled cable 4, thus facilitating the later replacement and maintenance of the liquid-cooled cable 4. On the other hand, the sealing performance between the assembled liquid-cooled cable 4 and the sealing sleeve 3 is good, avoiding the occurrence of coolant leakage.

[0031] In a preferred embodiment of the present invention, a convex portion protrudes outward on the outer wall of the sealing sleeve 3 near the liquid-cooled cable 4, and an external thread that is used in cooperation with the internal thread on the inner wall of the first connecting member 7 is provided on the outer wall of the convex portion. And a second sealing member 10 is sleeved at the joint of the convex portion and the inner wall step of the first connecting member 7.

[0032] In the above solution, as Figure 4-6 shown, the second sealing member 10 is placed at the end of the convex portion near the liquid-cooled cable 4 to play a role of secondary sealing, which can further prevent the coolant from overflowing from the connection between the first connecting member 7 and the liquid-cooled cable 4.

[0033] Of course, a second sealing element 10 can be fitted onto the end of the liquid-cooled cable 4 that abuts against the first connector 7. When the first connector 7 is fitted onto the end of the liquid-cooled cable 4 and the liquid-cooled cable 4 is rotated to make it threadedly connected to the sealing sleeve 3, and the first connector 7 is continued to rotate to move axially towards the sealing sleeve 3, the end of the liquid-cooled cable 4 abuts against the end of the sealing sleeve 3 and squeezes the first sealing element 9 fitted between them, thereby fixing the sealing sleeve 3 and the liquid-cooled cable 4 together. At the same time, the sealing action of the first sealing element 9 and the two second sealing elements 10 located at the protrusion and the contact part between the first connector 7 and the liquid-cooled cable 4 achieves a multi-stage sealing effect, which can prevent coolant from overflowing from the connection between the sealing sleeve 3 and the liquid-cooled cable 4. The assembled liquid-cooled cable 4 and the sealing sleeve 3 have good sealing performance, avoiding coolant leakage.

[0034] In a preferred embodiment of the present invention, the two ends of the circuit two-way pipe 5 are respectively fixedly provided with a first threaded connector 14, the adjacent surfaces of the two sealing sleeves 3 are respectively fixedly provided with a second threaded connector 15 that cooperates with the two first threaded connectors 14, and the two ends of the circuit two-way pipe 5 are respectively movably sleeved with a second connector 8 that can be threadedly connected to the aligned first threaded connectors 14 and second threaded connectors 15.

[0035] In the above scheme, during assembly, after aligning the first threaded connector 14 and the second threaded connector 15, the second connector 8 on the circuit two-way pipe 5 is moved toward the first threaded connector 14. Then, the second connector 8 is rotated so that its threads are screwed onto the first threaded connector 14. The second connector 8 is then rotated further to move toward the second threaded connector 15 of the sealing sleeve 3 until half of the second connector 8 is screwed and fixed onto the first threaded connector 14, and the other half is screwed and fixed onto the second threaded connector 15.

[0036] In summary, with the cooperation of the second connector 8, the first threaded connector 14, and the second threaded connector 15, the sealing sleeve 3 and the circuit two-way pipe 5 can be connected together. This connection method facilitates future replacement and maintenance.

[0037] In a preferred embodiment of the present invention, at least one groove 17 is partially recessed inward at the port of each of the first threaded connectors 14, and a protrusion 16 is formed outward at the port of each of the second threaded connectors 15, which can be inserted into the groove 17 on the corresponding first threaded connector 14.

[0038] In the above scheme, the groove 17 on the first threaded connector 14 and the protrusion 16 on the second threaded connector 15 work together to guide the first threaded connector 14 and the second threaded connector 15 so that the second connector 8 can be threadedly fixed at the connection end of both.

[0039] In a preferred embodiment of the present invention, each of the second threaded connectors 15 is fitted with a third seal 18 at its port, and the third seal 18 is provided with a clearance hole for the protrusion 16 to pass through.

[0040] In the above scheme, the third sealing element 18 serves a sealing function to prevent coolant from overflowing from the connection between the circuit two-way pipe 5 and the sealing sleeve 3 (that is, the connection between the first threaded connector 14 of the circuit two-way pipe 5 and the second threaded connector 15 of the sealing sleeve 3), thus achieving a sealing function.

[0041] In use, the No. 3 sealing element 18 is fitted onto the port of the first threaded connector 14 of the two-way pipe 5, and the second threaded connector 15 of the sealing sleeve 3 is aligned with the first threaded connector 14 and the No. 3 sealing element 18 is pressed. Then, the No. 2 connector 8 on the two-way pipe 5 is moved toward the first threaded connector 14. Then, the No. 2 connector 8 is rotated so that the threads of the No. 2 connector 8 are screwed onto the first threaded connector 14, and the No. 2 connector 8 is rotated again so that it moves toward the second threaded connector 15 of the sealing sleeve 3, until half of the No. 2 connector 8 is screwed and fixed onto the first threaded connector 14, and the other half is screwed and fixed onto the second threaded connector 15.

[0042] In summary, with the cooperation of the second connector 8 with the first threaded connector 14 and the second threaded connector 15, the sealing sleeve 3 and the circuit two-way pipe 5 can be connected together.

[0043] The above connection method is adopted to facilitate future replacement and maintenance.

[0044] In a preferred embodiment of the present invention, the corrective seal includes: a guide strip 11 and a sealing cover 12; wherein, The inner wall portion of the charging terminal 2 protrudes outward to form at least one guide strip 11, and the inner wall portion of the car charging port is recessed inward to form a guide groove that cooperates with the guide strip 11. The front end of the liquid cooling gun head housing 1 is provided with a retractable sealing cover 12 that can surround the charging terminal 2 inside and can extend from the end of the charging terminal 2. An elastic element 13 is sleeved on the shaft of the sealing cover 12. One end of the elastic element 13 is fixed to the liquid cooling gun head housing 1, and the other end is fixed to the free end of the elastic element 13.

[0045] In the above scheme, when the charging end 2 is inserted into the charging port of the car, the guide strip 11 and the guide groove of the charging port work together to guide and correct the charging end 2 of the hydraulic charging gun so that it can be aligned with the charging port on the car, avoiding manual insertion and removal angle deviation, and preventing radial deviation from easily occurring when the gun head is inserted.

[0046] Furthermore, the front end of the liquid-cooled nozzle housing 1 is fixedly provided with a sealing cover 12 that can extend and retract along the axial direction of the charging terminal 2 via the elastic member 13, thus serving a sealing function. When the charging terminal 2 is inserted into the charging port of the car, the sealing cover 12, under the action of the elastic member 13, tightly abuts against the charging port, thereby sealing and surrounding the charging terminal 2, thus preventing rain and snow from entering the charging port and the connection point of the charging terminal 2 in rainy or snowy weather, which could potentially cause a short circuit.

[0047] In use, manually push the port of the sealing cover 12 to bring the sealing cover 12 closer to the liquid cooling gun head housing 1 and compress the elastic member 13 to put it in a compressed state. When the opening of the sealing cover 12 moves to the point where the charging end 2 is exposed from the opening of the sealing cover 12, the charging end 2 can be accurately inserted into the charging port of the car under the action of the guide strip 11. Then release the sealing cover 12, and the sealing cover 12 moves toward the charging port of the car under the action of the elastic member 13 until the sealing cover 12 is tightly against the charging port.

[0048] In a preferred embodiment of the present invention, the sealing cover 12 is a corrugated hose made of transparent material, and the elastic element 13 is a spring.

[0049] In the above scheme, the purpose of using a transparent corrugated flexible tube is twofold: firstly, it allows the sealing cover 12 to extend and retract, and secondly, it allows the connection between the charging terminal 2 and the charging port to be observed through the sealing cover 12.

[0050] In summary, the correction and sealing structure of the liquid-cooled charging gun head provided by this invention overcomes the problems in the prior art where radial deviation, circumferential misalignment, and axial pushing offset are easily caused during gun head insertion. Forced insertion can lead to bending of the charging terminals, which directly leads to sealing failure after long-term use. The sealing components of the liquid-cooled electrodes of the liquid-cooled charging gun are prone to loosening and local non-tight pressing, resulting in poor sealing performance, causing coolant leakage, water vapor intrusion into the insulation cavity, and short circuit faults.

[0051] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0053] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A calibration and sealing structure for the liquid-cooled nozzle of a charging pile, comprising: Liquid-cooled gun head housing (1), a charging end (2) provided at the front end of the liquid-cooled gun head housing (1), and two DC male connectors (21) provided inside the charging end (2), partially passing through the interior of the liquid-cooled gun head housing (1) and connected to the liquid-cooled electrode through a sealing mechanism; characterized in that each said sealing mechanism comprises: a sealing sleeve (3) and a sealing connector; wherein, The end of the DC male connector (21) is hermetically embedded inside the sealing sleeve (3), the liquid inlet end of each sealing sleeve (3) is detachably connected to the liquid-cooled cable (4) of the liquid-cooled electrode through a sealing connector, and each DC male connector (21) is connected to the wire in the liquid-cooled cable (4) through a adapter. The liquid outlet ends of the two sealing sleeves (3) are detachably connected to the loop two-way pipe (5) through a second connector (8). The loop two-way pipe (5) is connected to an external cooling system through a return pipe (6), and a correction seal is provided on the charging end (2) to prevent misalignment during plugging.

2. The calibration and sealing structure for the liquid-cooled charging gun head of the charging pile according to claim 1, characterized in that, The sealing connector comprises: a first connector (7), a second connector (8) and a first seal (9); wherein, The inner diameters of the sealing sleeve (3) and the liquid-cooled cable (4) are the same, the wall thickness of the sealing sleeve (3) is greater than the wall thickness of the liquid-cooled cable (4), and the end of the liquid-cooled cable (4) adjacent to the sealing sleeve (3) extends outward to form a limiting ring that can abut against the port of the sealing sleeve (3). A first seal (9) with a "middle" - shaped cross-section and communicating with its interior is coaxially sleeved between the end of the sealing sleeve (3) and the adjacent end of the liquid-cooled cable (4), so that the adjacent ends of the sealing sleeve (3) and the liquid-cooled cable (4) abut against each other to squeeze the middle part of the first seal (9). The stepped first connector (7) passes through the end of the liquid-cooled cable (4) and is screwed onto the sealing sleeve (3) until the end of the first connector (7) can abut against the limiting ring of the liquid-cooled cable (4).

3. The calibration and sealing structure for the liquid-cooled charging gun head of the charging pile according to claim 2, characterized in that, A convex portion protrudes outward on the outer wall of the sealing sleeve (3) close to the liquid-cooled cable (4), and an external thread for cooperating with the internal thread on the inner wall of the first connector (7) is provided on the outer wall of the convex portion. A second seal (10) is sleeved at the joint between the convex portion and the inner wall step of the first connector (7).

4. The calibration and sealing structure for the liquid-cooled charging gun head of the charging pile according to claim 3, characterized in that, First threaded connectors (14) are fixedly provided at both ends of the loop two-way pipe (5), second threaded connectors (15) for cooperating with the two first threaded connectors (14) are fixedly provided on the adjacent surfaces of the two sealing sleeves (3), and second connectors (8) that can be threadedly connected to the aligned first threaded connectors (14) and second threaded connectors (15) are movably sleeved at both ends of the loop two-way pipe (5).

5. The calibration and sealing structure for the liquid-cooled charging gun head according to claim 4, characterized in that, Each of the first threaded connectors (14) has a portion recessed inward to form at least one groove (17) at its port, and each of the second threaded connectors (15) has a portion protruding outward to form a protrusion (16) that can be inserted into the groove (17) on the corresponding first threaded connector (14).

6. The calibration and sealing structure for the liquid-cooled charging gun head of the charging pile according to claim 5, characterized in that, Each of the second threaded connectors (15) has a third seal (18) fitted on its port, and each third seal (18) has a clearance hole for the protrusion (16) to pass through.

7. The calibration and sealing structure for the liquid-cooled charging gun head of the charging pile according to claim 5, characterized in that, The corrective seal includes: a guide strip (11) and a sealing cover (12); wherein, The inner wall portion of the charging end (2) protrudes outward to form at least one guide strip (11), and the inner wall portion of the car charging port is recessed inward to form a guide groove that cooperates with the guide strip (11). The front end of the liquid cooling gun head housing (1) is provided with a retractable sealing cover (12) that can surround the charging end (2) inside and can extend from the end of the charging end (2). An elastic element (13) is sleeved on the shaft of the sealing cover (12). One end of the elastic element (13) is fixed on the liquid cooling gun head housing (1), and the other end is fixed on the free end of the elastic element (13).

8. The calibration and sealing structure for the liquid-cooled charging gun head of the charging pile according to claim 7, characterized in that, The sealing cover (12) is a corrugated hose made of transparent material, and the elastic element (13) is a spring.

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