Direct current charging plug and socket

Abstract

The invention relates to the technical field of plugs and sockets, in particular to a direct-current charging plug and socket which comprises a plugging base fixedly mounted at the bottom of a socket body. The socket inner core frame is fixedly mounted on the inner side of the plugging base, and a socket butting base shell is fixedly mounted at the top of the socket inner core frame; the plug cover is fixedly installed on the top of the plug body, a cable is arranged on the inner side of the plug cover, and a sealing ring is arranged between the cable and the plug cover. Through the effects of the first insulating part and the positioning small plate of the plug main body and the second insulating part and the clamping part, the plug socket has the advantage of being capable of being matched with a shore-side cable winch structure and a control system to realize automatic plugging and unplugging; the problems that an existing electric ship cannot be conveniently matched with a shore side cable winch structure and a control system to achieve automatic plugging and unplugging, and charging use of the electric ship is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of plug and socket, and more particularly to a DC charging plug and socket. Background Art

[0002] Based on the requirements of environmental protection policies, energy efficiency and cost, technological development drive, and diverse market demands, significant progress has been made in the development of electric ships in China in recent years. Currently, the number of electric ships under construction and in operation in China has exceeded 500, including various ship types such as ferry boats, offshore ships, passenger ships, and tugboats.

[0003] Currently, existing electric ships are inconvenient to cooperate with the shore - side cable winch structure and control system to achieve automatic plug - in and unplug, which affects the charging use of electric ships. Therefore, we propose a DC charging plug and socket. Summary of the Invention

[0004] The purpose of the present invention is to provide a DC charging plug and socket, which has the advantage of being able to cooperate with the shore - side cable winch structure and control system to achieve automatic plug - in and unplug, and solves the problem that existing electric ships are inconvenient to cooperate with the shore - side cable winch structure and control system to achieve automatic plug - in and unplug, affecting the charging use of electric ships.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A DC charging plug and socket, including a socket body and a plug body for mating use, further including: A plug - in base fixedly installed at the bottom of the socket body; A socket inner - core frame fixedly installed inside the plug - in base, and a socket docking base housing is fixedly installed at the top of the socket inner - core frame; A plug cover fixedly installed at the top of the plug body. A cable is arranged inside the plug cover. A sealing ring is arranged between the cable and the plug cover. A cable pressing cover is arranged between the top of the sealing ring and the cable. A crimping flange is fixedly installed at the bottom of the plug cover, and a plug inner shell is fixedly installed at the bottom of the plug cover through the crimping flange.

[0006] Preferably, a push - rod mounting bracket is fixedly installed at the lower end on the left side of the plug - in base. An electric push - rod is arranged at the upper end of the push - rod mounting bracket. The extending end of the electric push - rod is fixedly installed with an extension rod that slides on the inner surface of the left end of the plug - in base. A third limit switch and a second bracket are respectively fixedly installed at the front and rear ends on the left side of the plug - in base. A second limit switch is fixedly installed on one side of the left end of the second bracket. A first limit switch is fixedly installed on the inner wall of the left end of the socket body.

[0007] Preferably, a protective cover is hinged to the upper end of one side of the socket docking base housing. A reset spring is sleeved at the hinge joint between the protective cover and the socket docking base housing. One end of the protective cover is provided with a fulcrum roller. The bottom of the socket docking base housing is fixedly installed with a second insulating member through a crimping member. A fastener is arranged at the bottom of the second insulating member. An earthing conductive copper ring, a negative conductive copper ring, and a positive conductive copper ring are fixedly installed on the inner surface of the second insulating member from the inside out through the fastener. Fiber optic communication is arranged in the middle of the inner surface of the second insulating member.

[0008] Preferably, an inner shell crimping ring is fixedly installed at the bottom of the plug inner shell. A first insulating member is fixedly installed between the inner shell crimping ring and the plug inner shell. A positioning small plate is fixedly connected to the top of the first insulating member. An earthing copper ring, a negative copper ring, and a positive copper ring are fixedly installed on the inner surface of the first insulating member from the inside out through the positioning small plate. Elastic spring pieces are arranged on one side of the earthing copper ring, the negative copper ring, and the positive copper ring. A fiber optic communication module adapted to fiber optic communication is arranged on the inner surface of the middle of the first insulating member.

[0009] Preferably, two of the four cables are positive cables and two are negative cables.

[0010] Preferably, three detachable maintenance doors are arranged on the outer surface of the socket body. An upper flange and a lower flange are respectively welded at the upper and lower ends of the outer surface of the socket body. A docking bell mouth is arranged at the top of the socket body. A reinforcing rib is fixedly connected to the upper end of the outer surface of the docking bell mouth.

[0011] Preferably, a connecting seat is fixedly installed at the top of the plug cover. A plurality of guide rollers are fixedly installed at equal angles on the upper end of the outer surface of the plug body. A blind hole column is arranged at the top of the plug body. The lower end of the plug body is designed in a 360-degree circumference.

[0012] Preferably, a base flange is fixedly installed at the bottom of the plug-in base. An inlet hole plate is fixedly installed at the upper end inside the base flange. A plurality of drainage channels are arranged at the outer end of the inner cavity of the plug-in base.

[0013] Preferably, a heater is fixedly installed at one end of the top of the inner cavity of the plug-in base. A dehumidifier is fixedly installed at the lower end of the inner wall of the socket inner core frame. A second detachable maintenance door is fixedly installed on the outer surface of the socket inner core frame.

[0014] Preferably, a controller is fixedly installed at the left end of the outer surface of the plug-in base. The controller includes three indicator lights for heating and dehumidifying, plug in place, and plug locking, and an emergency stop button.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the plug body is inserted into the socket body, due to the settings of the first insulating member, the positioning small plate, the second insulating member and the fastening member, the grounding copper ring, the negative copper ring and the positive copper ring can be respectively positioned with the grounding conductive copper ring, the negative conductive copper ring and the positive conductive copper ring, thus preventing them from falling off. After the lower end of the plug body touches the fulcrum roller, the protection cover can be driven to turn upward with the hinge end of the protection cover and the socket docking base housing as the center of the circle, causing the return spring to contract until it is turned over by 90 degrees and fully opened. At this time, the inner shell of the plug will drive the inner shell crimping ring closer to the socket docking base housing, so that the grounding conductive copper ring, the negative conductive copper ring and the positive conductive copper ring can be respectively inserted and matched with the grounding copper ring, the negative copper ring and the positive copper ring. The setting of the elastic reed ensures good contact of the conductor while being smoothly inserted. In addition, when the inner shell crimping ring cooperates with the socket docking base housing, fiber optic communication will also enter the fiber optic communication module for cooperation. After the plug body and the socket body are properly matched, the first limit switch can be triggered. At this time, the PLC issues an instruction to the electric push rod to control it to drive the extension rod to extend. After the electric push rod extends in place, the signal of the third limit switch is triggered, indicating that the extension rod is in place, that is, one end of the extension rod can limit the position of the lower end of the outer surface of the plug body. At this time, it means that the plug body and the socket body are inserted in place. After the charging is completed, the PLC issues an instruction to the electric push rod to control it to drive the extension rod to retract. After the electric push rod retracts in place, the signal of the second limit switch is triggered, indicating that the extension rod has retracted in place, that is, one end of the extension rod releases the limiting ability of the lower end of the outer surface of the plug body, and then the plug body is separated from the socket body.

[0016] 2. The retracted return spring will be driven by the protection cover to turn downward and reset with the hinge end of the protection cover and the socket docking base housing as the center of the circle, which can play a role in dust and water protection for the socket docking base housing and is beneficial for people's use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the first perspective of the present invention; Figure 2 is a schematic sectional structural diagram of the second perspective of the present invention; Figure 3 is a schematic sectional structural diagram of the socket body in a sectional state of the present invention; Figure 4 is a schematic structural diagram of the socket body of the present invention; Figure 5 is a schematic structural diagram of the plug body of the present invention; Figure 6 is a schematic sectional structural diagram of the plug body of the present invention; Figure 7 is a schematic structural diagram of the first insulating member of the present invention; Figure 8 Schematic diagram of the protective cover structure of the present invention; Figure 9 Schematic cross-sectional structure diagram of the present invention in a top-down view.

[0018] In the figure: 1, socket body; 101, first detachable inspection door; 102, reinforcing rib; 103, docking bell mouth; 104, upper flange; 105, lower flange; 2, plug body; 201, guiding roller; 202, cable compression cover; 203, connecting seat; 204, cable; 205, inner plug shell; 206, inner shell crimping ring; 207, blind hole column; 208, crimping flange; 209, plug cover; 210, sealing ring; 3, plug-in base; 301, push rod mounting bracket; 302, electric push rod; 303, second bracket; 304, second limit switch; 305, third limit switch; 306, base flange; 307, socket inner core frame; 308, inlet hole plate; 309, drainage channel; 310, first limit switch; 311, extension rod; 4, controller; 5, first insulating part; 501, positive copper ring; 502, negative copper ring; 503, grounding copper ring; 504, fiber optic communication module; 505, positioning small plate; 506, elastic reed; 6, protective cover; 601, return spring; 602, fulcrum roller; 603, socket docking base shell; 604, second insulating part; 605, positive conductive copper ring; 606, negative conductive copper ring; 607, grounding conductive copper ring; 608, fiber optic communication; 609, fastener; 610, second detachable inspection door; 7, dehumidifier; 8, heater. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The socket body 1, the first detachable inspection door 101, the reinforcing rib 102, the docking bell mouth 103, the upper flange 104, the lower flange 105, the plug body 2, the guide roller 201, the cable compression cover 202, the connection seat 203, the cable 204, the plug inner shell 205, the inner shell crimping ring 206, the blind hole column 207, the crimping flange 208, the plug cover 209, the sealing ring 210, the plug-in base 3, the push rod mounting bracket 301, the electric push rod 302, the second bracket 303, the second limit switch 304, the third limit switch 305, the base flange 306, the socket inner core frame 307, the inlet hole plate 308, the drainage channel 309, the first limit switch 310, the extension rod 311, the controller 4, the first insulating member 5, the positive copper ring 501, the negative copper ring 502, the grounding copper ring 503, the optical fiber communication module 504, the positioning small plate 505, the elastic reed 506, the protective cover 6, the return spring 601, the fulcrum roller 602, the socket docking base housing 603, the second insulating member 604, the positive conductive copper ring 605, the negative conductive copper ring 606, the grounding conductive copper ring 607, the optical fiber communication 608, the fastening member 609, the second detachable inspection door 610, the dehumidifier 7 and the heater 8 components are all common standard components or components known to those skilled in the art, and their structures and principles can all be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0023] Example 1, please refer to Figures 1-9 As shown, the present invention provides a technical solution: a DC charging plug and socket, including a socket body 1 and a plug body 2 that are used in a plug-and-play manner, and further including: A plug-in base 3 fixedly installed at the bottom of the socket body 1; A socket inner core frame 307 fixedly installed inside the plug-in base 3, and a socket docking base housing 603 is fixedly installed at the top of the socket inner core frame 307; A plug cover 209 fixedly installed on the top of the plug body 2. A cable 204 is arranged inside the plug cover 209. A sealing ring 210 is arranged between the cable 204 and the plug cover 209. A cable pressing cover 202 is arranged between the top of the sealing ring 210 and the cable 204. A crimping flange 208 is fixedly installed at the bottom of the plug cover 209. The plug inner shell 205 is fixedly installed at the bottom of the plug cover 209 through the crimping flange 208.

[0024] At the lower end on the left side of the plug-in base 3, a push rod mounting bracket 301 is fixedly installed. An electric push rod 302 is arranged at the upper end of the push rod mounting bracket 301. The extending end of the electric push rod 302 is fixedly installed with an extension rod 311 sliding on the inner surface of the left end of the plug-in base 3. A third limit switch 305 and a second bracket 303 are respectively fixedly installed at the front and rear ends on the left side of the plug-in base 3. A second limit switch 304 is fixedly installed on one side of the left end of the second bracket 303. A first limit switch 310 is fixedly installed on the inner wall of the left end of the socket body 1. A protective cover 6 is hinged at the upper end of one side of the socket docking base housing 603. A return spring 601 is sleeved at the hinge between the protective cover 6 and the socket docking base housing 603. A fulcrum roller 602 is arranged at one end of the protective cover 6. A second insulating member 604 is fixedly installed at the bottom of the socket docking base housing 603 through a crimping member. A fastening member 609 is arranged at the bottom of the second insulating member 604. A grounding conductive copper ring 607, a negative conductive copper ring 606 and a positive conductive copper ring 605 are fixedly installed on the inner surface of the second insulating member 604 from the inside out through the fastening member 609. An optical fiber communication 608 is arranged in the middle of the inner surface of the second insulating member 604. An inner shell crimping ring 206 is fixedly installed at the bottom of the plug inner shell 205. A first insulating member 5 is fixedly installed between the inner shell crimping ring 206 and the plug inner shell 205. A positioning small plate 505 is fixedly connected to the top of the first insulating member 5. A grounding copper ring 503, a negative copper ring 502 and a positive copper ring 501 are fixedly installed on the inner surface of the first insulating member 5 from the inside out through the positioning small plate 505. Elastic spring pieces 506 are arranged on one side of the grounding copper ring 503, the negative copper ring 502 and the positive copper ring 501. An optical fiber communication module 504 adapted to the optical fiber communication 608 is arranged on the inner surface of the middle of the first insulating member 5. Two of the four cables 204 are positive cables and two are negative cables. Technical solution: Through the setting of the upper flange 104, the socket body 1 can be fixedly installed on the ship. When charging is required, the cable winch drives the plug body 2 to approach the socket body 1. When the plug body 2 is inserted into the socket body 1, due to the settings of the first insulating member 5 and the positioning small plate 505 and the second insulating member 604 and the fastening member 609, the grounding copper ring 503, the negative copper ring 502 and the positive copper ring 501 can be respectively positioned with the grounding conductive copper ring 607, the negative conductive copper ring 606 and the positive conductive copper ring 605, so as to prevent them from falling off. After the lower end of the plug body 2 contacts the fulcrum roller 602, it can drive the protective cover 6 to turn upward with the hinge end of the protective cover 6 and the socket docking base housing 603 as the center of the circle, causing the return spring 601 to contract until it is completely opened at 90 degrees. At this time, the plug inner shell 205 will drive the inner shell crimping ring 206 to approach the socket docking base housing 603, so that the grounding conductive copper ring 607, the negative conductive copper ring 606 and the positive conductive copper ring 605 can be respectively inserted and matched with the grounding copper ring 503, the negative copper ring 502 and the positive copper ring 501. The setting of the elastic reed 506 ensures good contact of the conductors while being inserted smoothly. In addition, when the inner shell crimping ring 206 cooperates with the socket docking base housing 603, the optical fiber communication 608 will also enter the optical fiber communication module 504 for cooperation. After the plug body 2 and the socket body 1 are in place, the first limit switch 310 can be triggered. At this time, the PLC issues an instruction to the electric push rod 302 to control it to drive the extension rod 311 to extend. After the electric push rod 302 extends in place, the signal of the third limit switch 305 is triggered, indicating that the extension rod 311 is in place, that is, one end of the extension rod 311 can limit the position of the lower end of the outer surface of the plug body 2. At this time, it means that the plug body 2 and the socket body 1 are inserted in place. After charging is completed, the PLC issues an instruction to the electric push rod 302 to control it to drive the extension rod 311 to retract. After the electric push rod 302 retracts in place, the signal of the second limit switch 304 is triggered, indicating that the extension rod 311 has retracted in place, that is, one end of the extension rod 311 releases the limiting ability of the lower end of the outer surface of the plug body 2. Then, the plug body 2 and the socket body 1 are separated. At this time, the contracted return spring 601 will drive the protective cover 6 to turn downward and reset with the hinge end of the protective cover 6 and the socket docking base housing 603 as the center of the circle, which can play a role in dust and water protection for the socket docking base housing 603 and is beneficial to people's use.

[0025] It should be noted that the DC charging plug and socket of the present invention is a plug and socket with a rated voltage of 1000V DC and a rated current of 2000A, which can only meet the working voltage and current-carrying capacity requirements. It can also cooperate with the shore-side cable winch structure and control system to achieve automatic plugging and unplugging, and fills the gap of 1000V and 2000A plugs and sockets in the technical field of DC charging for ship shore power systems.

[0026] Embodiment 2. On the basis of Embodiment 1, as Figures 1-9 shown, it is disclosed that there are three first detachable maintenance doors 101 on the outer surface of the socket body 1. Upper flanges 104 and lower flanges 105 are respectively welded to the upper and lower ends of the outer surface of the socket body 1. A docking bell mouth 103 is arranged at the top of the socket body 1. A reinforcing rib 102 is fixedly connected to the upper end of the outer surface of the docking bell mouth 103. A connecting seat 203 is fixedly installed at the top of the plug cover 209. A plurality of guide rollers 201 are fixedly installed on the upper end of the outer surface of the plug body 2 at equal angles. A blind hole column 207 is arranged at the top of the plug body 2. The lower end of the plug body 2 is designed in a 360-degree circumference.

[0027] In this technical solution: Through the setting of the first detachable maintenance door 101, it is convenient to perform maintenance work on the socket body 1. Through the setting of the upper flange 104 and the lower flange 105, it is convenient for the installation of the socket body 1 on the hull and the installation and cooperation of the socket body 1 with the plug-in base 3. Through the setting of the docking bell mouth 103, when the socket body 1 is inserted and matched with the plug body 2, it can play the ability of large-range guiding, which is convenient for the insertion of the socket body 1 and the plug body 2. Through the setting of the reinforcing rib 102, the strength of the docking bell mouth 103 can be improved. Through the setting of the connecting seat 203, after being fixedly connected to the plug body 2 and the equipment relatively, it can prevent the cable 204 from bearing the weight of the entire plug body 2, so as to prevent the cable 204 from being pulled off or the joint from loosening and breaking after long-term use. Through the setting of the guide rollers 201, the plug body 2 can be smoothly inserted into the socket body 1, and the gap between the plug body 2 and the socket body 1 can be eliminated, thereby stabilizing the entire plug-and-socket structure. Through the 360-degree circumference design of the lower end of the plug body 2, the plug body 2 can be inserted in any angle without the need to identify the direction, adapting to the plugging and unplugging to the greatest extent, with the guiding function of the arc surface and the limiting function of the step surface (the step surface can cooperate with the extension rod 311 for limiting).

[0028] Embodiment 3. On the basis of Embodiment 1, as Figures 1-9 shown, it is disclosed that a base flange 306 is fixedly installed at the bottom of the plug-in base 3. An inlet hole plate 308 is fixedly installed at the upper end inside the base flange 306. A plurality of drainage channels 309 are arranged at the outer end of the inner cavity of the plug-in base 3. A heater 8 is fixedly installed at one end of the top of the inner cavity of the plug-in base 3. A dehumidifier 7 is fixedly installed at the lower end of the inner wall of the socket inner core frame 307. A second detachable maintenance door 610 is fixedly installed on the outer surface of the socket inner core frame 307. A controller 4 is fixedly installed at the left end of the outer surface of the plug-in base 3, and the controller 4 includes three indicator lights of heating and dehumidifying, plug in place, and plug locking, and an emergency stop button.

[0029] This technical solution: Through the setting of the base flange 306, the plug-in base 3 can be strengthened and weighted. Through the setting of the inlet hole plate 308, the passing and wiring of the connecting wire are facilitated. Through the setting of the drainage channel 309, the water body can be diverted and drained, avoiding the influence of the water body on the operation of the socket body 1. Through the setting of the heater 8 and the dehumidifier 7, the socket body 1 can be conveniently heated and dehumidified, ensuring the normal use of the socket body 1. Through the setting of the second detachable inspection door 610, the internal inspection of the socket inner core frame 307 is facilitated. Through the setting of the controller 4, it is convenient for the user to view and understand and perform the disconnection operation in case of emergency.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A DC charging plug and socket, comprising a socket body (1) and a plug body (2) that are used in a plugged-in manner, characterized in that, Further included are: A plug-in base (3) fixedly installed at the bottom of the socket body (1); A socket inner core frame (307) fixedly installed inside the plug-in base (3), and a socket docking base housing (603) is fixedly installed at the top of the socket inner core frame (307); A plug cap (209) fixedly installed at the top of the plug body (2), a cable (204) is arranged inside the plug cap (209), a sealing ring (210) is arranged between the cable (204) and the plug cap (209), a cable compression cap (202) is arranged between the top of the sealing ring (210) and the cable (204), a crimping flange (208) is fixedly installed at the bottom of the plug cap (209), and a plug inner shell (205) is fixedly installed at the bottom of the plug cap (209) through the crimping flange (208).

2. The DC charging plug and socket according to claim 1, characterized in that: A push rod mounting bracket (301) is fixedly installed at the lower end on the left side of the plug-in base (3), an electric push rod (302) is arranged at the upper end of the push rod mounting bracket (301), an extension rod (311) sliding on the inner surface of the left end of the plug-in base (3) is fixedly installed at the extending end of the electric push rod (302), a third limit switch (305) and a second bracket (303) are respectively fixedly installed at the front and rear ends on the left side of the plug-in base (3), a second limit switch (304) is fixedly installed on one side of the left end of the second bracket (303), and a first limit switch (310) is fixedly installed on the inner wall of the left end of the socket body (1).

3. The DC charging plug and socket according to claim 1, characterized in that: A protective cover (6) is hinged at the upper end on one side of the socket docking base housing (603), a return spring (601) is sleeved at the hinge between the protective cover (6) and the socket docking base housing (603), a fulcrum roller (602) is arranged at one end of the protective cover (6), a second insulating part (604) is fixedly installed at the bottom of the socket docking base housing (603) through a crimping part, a fastener (609) is arranged at the bottom of the second insulating part (604), a grounding conductive copper ring (607), a negative conductive copper ring (606) and a positive conductive copper ring (605) are fixedly installed on the inner surface of the second insulating part (604) from inside to outside through the fastener (609), and fiber optic communication (608) is arranged in the middle of the inner surface of the second insulating part (604).

4. The DC charging plug and socket according to claim 1, characterized in that: The bottom of the inner plug shell (205) is fixedly installed with an inner shell crimping ring (206). A first insulating member (5) is fixedly installed between the inner shell crimping ring (206) and the inner plug shell (205). The top of the first insulating member (5) is fixedly connected with a positioning small plate (505). An earthing copper ring (503), a negative copper ring (502), and a positive copper ring (501) are fixedly installed on the inner surface of the first insulating member (5) in sequence from inside to outside through the positioning small plate (505). Elastic reed pieces (506) are arranged on one side of the earthing copper ring (503), the negative copper ring (502), and the positive copper ring (501). A fiber optic communication module (504) adapted to fiber optic communication (608) is arranged on the inner surface of the middle end of the first insulating member (5).

5. The DC charging plug and socket according to claim 1, characterized in that: Two of the four cables (204) are positive cables and two are negative cables.

6. The DC charging plug and socket according to claim 1, characterized in that: The outer surface of the socket body (1) is provided with three first detachable maintenance doors (101). An upper flange (104) and a lower flange (105) are respectively welded to the upper and lower ends of the outer surface of the socket body (1). The top of the socket body (1) is provided with a docking bell mouth (103). A reinforcing rib (102) is fixedly connected to the upper end of the outer surface of the docking bell mouth (103).

7. The DC charging plug and socket according to claim 1, characterized in that: The top of the plug cover (209) is fixedly installed with a connecting seat (203). A plurality of guide rollers (201) evenly distributed at equal angles are fixedly installed on the upper end of the outer surface of the plug body (2). A blind hole column (207) is arranged at the top of the plug body (2). The lower end of the plug body (2) adopts a 360-degree circumferential design.

8. The DC charging plug and socket according to claim 1, characterized in that: The bottom of the plug-in base (3) is fixedly installed with a base flange (306). An inlet hole plate (308) is fixedly installed at the upper end inside the base flange (306). A plurality of drainage channels (309) are arranged at the outer end of the inner cavity of the plug-in base (3).

9. The DC charging plug and socket according to claim 1, characterized in that: A heater (8) is fixedly installed at one end of the top of the inner cavity of the plug-in base (3). A dehumidifier (7) is fixedly installed at the lower end of the inner wall of the socket inner core frame (307). A second detachable maintenance door (610) is fixedly installed on the outer surface of the socket inner core frame (307).

10. The DC charging plug and socket according to claim 1, characterized in that: A controller (4) is fixedly installed on the left end of the outer surface of the plug-in base (3), and the controller (4) includes three indicator lights for heating and dehumidifying, plug in place, and plug locking, and an emergency stop button.

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