A charging pile leakage detection device

Abstract

This application belongs to the technical field of leakage detection devices, and discloses a leakage detection device for a charging pile, which includes a leakage current transformer body. There are two wiring slots provided on the housing of the leakage current transformer body, and wiring terminals are embedded in both of the two wiring slots. A pressing mechanism for pressing the neutral line and the live line electrically connected to the charging pile onto the two wiring terminals respectively is provided on the housing of the leakage current transformer body. The pressing mechanism includes a pressing component and a power component. The pressing component includes a fixing plate fixed on the housing of the leakage current transformer body, a connecting rod penetrating through the fixing plate and rotatably connected to the fixing plate, a baffle fixed to one end of the connecting rod and used to block the two wiring slots, and a pressing block fixed on the side wall of one side of the baffle and used to press the neutral line or the live line. The power component is used to drive the connecting rod to rotate. This application changes the way of using wiring bolts to fix the neutral line and the live line, and avoids the situation that the connection of the neutral line and the live line is affected due to the slipping of the wiring bolts.

Description

Technical Field

[0001] The present invention relates to the technical field of leakage detection devices, and particularly relates to a leakage detection device for a charging pile. Background Art

[0002] As an infrastructure supporting the operation of electric vehicles, its safety and stability are crucial for the use experience and safety of electric vehicle users. Regular leakage detection is one of the key measures to ensure the normal operation of charging piles. Leakage detection can not only timely detect and repair potential safety hazards, avoid accidents, but also ensure that the charging pile is in good working condition, providing safe and reliable charging services for electric vehicle users. In addition, through regular detection, the performance of the charging pile can be evaluated, faults can be detected in time and repaired and optimized, thereby improving the working efficiency of the charging pile and providing a better charging experience for users.

[0003] A leakage detection current transformer, also known as a residual current transformer, is a detection element of a leakage protector. Its main function is to detect the residual current (ground fault current such as electric shock and leakage) of the main circuit passing through the iron core of the current transformer, and convert the residual current of the primary circuit into the output voltage of the secondary circuit.

[0004] A leakage current transformer is disclosed in the Chinese utility model patent with the publication number CN209561184U, which includes a housing and a coil installed in the housing. The housing is set to be annular. A shielding ring is arranged between the coil and the inner wall of the housing. Shielding sheets are respectively arranged at both ends of the shielding ring. A slot is opened at the top of the housing, and a top cover is inserted into the slot. The housing includes a shell body. There are two shell bodies, and the two shell bodies are buckled together. A connecting plate and a base are arranged at the bottom of the shell body. The shell body is fixedly connected to the base through the connecting plate. A first mounting hole is penetrated through the base. A reinforcing plate is fixedly arranged between the connecting plate and the base. Reinforcing ribs are arranged around the side of the shell body away from the other shell body. A wiring groove is opened on any one of the shell bodies, and a connecting terminal is arranged in the wiring groove.

[0005] Regarding the above related technologies, the inventor believes that there are the following defects: During the process of the leakage current transformer detecting the leakage of the charging pile, the connecting terminal is connected to the live wire and the neutral wire for electrically connecting to the charging pile. In the prior art, a wiring bolt for pressing the live wire or the neutral wire is usually arranged on the connecting terminal (in electrical engineering, it is used to connect wires and equipment to ensure the stable connection of wires and electrical safety). During the process of connecting and disconnecting the circuit, the staff needs to frequently turn the wiring bolt, and the operation is rather cumbersome. After long-term use, the wiring bolt is prone to thread slipping, which affects the normal use of the leakage current transformer. Therefore, it is necessary to improve the related technologies. Summary of the Invention

[0006] To solve the above problems, the present invention provides a leakage detection device for a charging pile.

[0007] The above technical object of the present invention is achieved through the following technical solutions: A leakage detection device for a charging pile includes a leakage current transformer body. Two wiring slots are provided on the housing of the leakage current transformer body, and wiring terminals are embedded in both of the two wiring slots. A pressing mechanism for pressing the neutral wire and the live wire electrically connected to the charging pile onto the two wiring terminals respectively is provided on the housing of the leakage current transformer body. The pressing mechanism includes a pressing component and a power component. The pressing component includes a fixing plate fixed on the housing of the leakage current transformer body, a connecting rod penetrating through the fixing plate and rotatably connected to the fixing plate, a baffle fixed to one end of the connecting rod and used to block the two wiring slots, and a pressing block fixed on the side wall of one side of the baffle and used to press the neutral wire or the live wire. The power component is used to drive the connecting rod to rotate.

[0008] Further, a U-shaped rod body is fixed on the side wall of the fixing plate close to the wiring slot. The power component includes a driving rod penetrating through the vertical section of the U-shaped rod body and rotatably connected, a motor fixed on the vertical section of the U-shaped rod body and used to drive the driving rod to rotate, a driving gear fixed to the end of the driving rod away from the motor, and a driven gear fixedly sleeved on the connecting rod and meshing with the driving gear.

[0009] Further, a horizontal slotted hole is provided at the position of the housing of the leakage current transformer body close to the bottom of the wiring slot. A C-shaped rod body for pressing a part of the neutral wire or the live wire into the horizontal slotted hole is fixed at the position of the baffle corresponding to the horizontal slotted hole.

[0010] Further, a rubber sleeve for pressing a part of the neutral wire or the live wire into the horizontal slotted hole is sleeved on the C-shaped rod body, and a rubber sheet is fixed on the side wall of the pressing block away from the baffle.

[0011] Further, a metering chip is integrated in the leakage current transformer body. After the neutral wire and the live wire electrically connected to the charging pile are pressed by the pressing block onto the surface of the wiring terminal, the metering chip reads the current value collected on the leakage current transformer body. If the current value is greater than the preset value, it indicates that the charging pile has a leakage, and the charging pile should be powered off.

[0012] Further, a loudspeaker is provided on the housing of the leakage current transformer body. A rotating column rotatably connected to the fixing plate penetrates through the fixing plate. An annular gear ring meshing with the driving gear is fixed at the end of the rotating column close to the baffle, and a cover plate for blocking the loudspeaker is fixed at the end of the rotating column away from the rotating column.

[0013] Further, the outer diameter of the driving gear is smaller than that of the driven gear. When the pressing block on the baffle presses the live wire or the neutral wire into the wiring groove, the included angle between the cover plate and the side wall of the housing of the leakage current transformer body is 70-100°.

[0014] Further, a U-shaped rib is fixed on the housing of the leakage current transformer body near the wiring groove. When the pressing block on the baffle presses the live wire or the neutral wire into the wiring groove, the side wall on one side of the baffle abuts against the side of the U-shaped rib away from the housing of the leakage current transformer body. A circular rib is fixed on the housing of the leakage current transformer body near the edge of the speaker. When the baffle rotates 180° toward the side away from the wiring groove, the side wall on one side of the cover plate abuts against the side of the circular rib away from the housing of the leakage current transformer body.

[0015] Further, a winding wheel is fixedly sleeved on the driving rod. A fixing strip parallel to the axis of the winding wheel is fixed inside the winding wheel. The distance between the fixing strip and the outer wall of the winding wheel is greater than the outer diameters of the live wire and the neutral wire. A fixing bolt threadedly connected to the fixing strip is penetrated through the fixing strip. One end of the fixing bolt close to the axis of the winding wheel is fixed with a rubber block.

[0016] Further, a battery slot is provided on the housing of the leakage current transformer body. A C-shaped housing surrounding the battery slot is fixed on the housing of the leakage current transformer body. One side of the C-shaped housing close to the battery slot is open. A battery cover slidably matched with the battery slot and used for shielding the battery slot is arranged in the battery slot. Fixing blocks are fixed on both sides of the battery cover. Springs are fixed between the tops of the fixing blocks and the inner top wall of the C-shaped housing. A magnetic block magnetically attracted to the inner top wall of the C-shaped housing is fixed on the top of the battery cover. An arc-shaped groove is arranged at the intersection between the side of the battery cover close to the battery slot and the bottom of the battery cover.

[0017] In summary, the present invention has the following beneficial effects:

[0018] 1. This application changes the way of using wiring bolts to fix the live wire and the neutral wire, avoiding the situation that the wiring of the live wire and the neutral wire is affected due to the slipping of the wiring bolts, which is beneficial to smoothly complete the leakage detection of the charging pile;

[0019] 2. In this application, the metering chip is a basic functional component in the leakage current transformer body. The leakage current transformer body collects the current output by the charging pile. The metering chip reads the current value collected on the leakage current transformer body. If the current value is greater than the preset value, it indicates that the charging pile has a leakage. The control chip controls the speaker to issue an alarm to remind the staff, so that the staff can cut off the power of the charging pile. Description of the Drawings

[0020] Figure 1It is a schematic diagram of the overall structure of an embodiment of the present invention. Among them, the baffle is in a fully open state, and the cover plate is in a fully closed state;

[0021] Figure 2 It is a schematic diagram for highlighting the internal structure of the C-shaped housing. Among them, the baffle is in a fully closed state, and the cover plate is opened to the maximum angle so that the staff can listen to the sound emitted by the speaker;

[0022] Figure 3 It is Figure 2 an enlarged schematic diagram of part A in

[0023] Figure 4 It is a cross-sectional view of an embodiment of the present invention for highlighting the wiring groove and the horizontal one-word groove.

[0024] In the figure: 1. Leakage current transformer body; 11. Wiring groove; 12. Wiring terminal; 13. Horizontal one-word groove; 14. Speaker; 15. U-shaped rib; 16. Annular rib; 17. Battery slot; 2. Pressing mechanism; 21. Pressing component; 211. Fixed plate; 212. Connecting rod; 213. Baffle; 214. Pressing block; 2141. Rubber sheet; 22. Power component; 221. Driving rod; 222. Motor; 223. Driving gear; 224. Driven gear; 3. U-shaped rod body; 4. C-shaped rod body; 41. Rubber sleeve; 5. Rotating column; 51. Annular gear ring; 52. Cover plate; 6. Winding wheel; 61. Fixed strip; 62. Fixed bolt; 63. Limiting strip; 7. C-shaped housing; 8. Battery cover; 81. Fixed block; 82. Spring; 83. Magnetic attraction block; 84. Arc-shaped groove. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] As Figures 1-4As shown in the figure, an embodiment of the present application discloses a leakage detection device for a charging pile, including a leakage current transformer body 1 (the leakage current transformer body 1 refers to the whole leakage current transformer commonly used in the prior art, including a housing, a coil, a shielding coil, shielding sheets, a control chip, a metering chip, etc. The composition, assembly method and working principle of each component belong to the prior art and will not be elaborated here). There are two wiring grooves 11 provided on the housing of the leakage current transformer body 1, and wiring terminals 12 are embedded in both of the two wiring grooves 11. A pressing mechanism 2 is provided on the housing of the leakage current transformer body 1 for pressing the zero wire and the live wire electrically connected to the charging pile onto the two wiring terminals 12 respectively. The pressing mechanism 2 includes a pressing component 21 and a power component 22. The pressing component 21 includes a fixing plate 211 fixed on the housing of the leakage current transformer body 1, a connecting rod 212 penetrating through the fixing plate 211 and rotatably connected to the fixing plate 211, a baffle 213 fixed to one end of the connecting rod 212 and used to block the two wiring grooves 11, and a pressing block 214 fixed on the side wall of one side of the baffle 213 and used to press the zero wire or the live wire. The power component 22 is used to drive the connecting rod 212 to rotate.

[0027] When connecting the zero wire and the live wire electrically connected to the charging pile to the wiring terminals 12 in the wiring grooves 11, the staff needs to drive the connecting rod 212 to rotate through the power component 22, so that the baffle 213 is completely opened. After putting the wiring ends of the zero wire and the live wire electrically connected to the charging pile into the wiring grooves 11, drive the connecting rod 212 to rotate in the reverse direction through the power component 22 until the two pressing blocks 214 press the zero wire and the live wire respectively, then the connection between the zero wire and the live wire and the wiring terminals 12 can be completed. This changes the way of using wiring bolts for fixation in the traditional technology, avoids the phenomenon of thread slipping, and is beneficial to extending the service life of the leakage detection device for the charging pile.

[0028] A U-shaped rod body 3 is fixed on the side wall of the fixing plate 211 close to the wiring groove 11. The power component 22 includes a driving rod 221 penetrating through the vertical section of the U-shaped rod body 3 and rotatably connected, a motor 222 fixed on the vertical section of the U-shaped rod body 3 and used to drive the driving rod 221 to rotate, a driving gear 223 fixed to the end of the driving rod 221 away from the motor 222, and a driven gear 224 fixedly sleeved on the connecting rod 212 and meshing with the driving gear 223.

[0029] After the motor 222 starts to work, it drives the drive rod 221 to rotate. The drive rod 221 drives the rotation of the driving gear 223, the driven gear 224 meshing with the driving gear 223, the connecting rod 212 fixed to the driven gear 224, and the baffle 213 fixed to the connecting rod 212. This facilitates the staff to control the movement of the baffle 213 by controlling the start, stop, and rotation direction of the motor 222, so as to complete the pressing action on the neutral wire and the live wire by the pressing block 214 on the baffle 213, so that the leakage current transformer body 1 can perform leakage detection on the charging pile.

[0030] A horizontal slot 13 is provided at a position on the housing of the leakage current transformer body 1 close to the bottom of the wiring slot 11. A C-shaped rod 4 for pressing a part of the neutral wire or the live wire into the horizontal slot 13 is fixed at a position corresponding to the horizontal slot 13 on the baffle 213.

[0031] The C-shaped rod 4 moves synchronously with the baffle 213. During the process of the pressing block 214 pressing the terminal of the neutral wire or the live wire into the wiring slot 11, the C-shaped rod 4 gradually presses the middle part of the neutral wire or the live wire into the horizontal slot 13, which is beneficial to improving the pressing effect on the neutral wire or the live wire and reducing the probability of cable loosening during the leakage detection process of the charging pile.

[0032] A rubber sleeve 41 for pressing a part of the neutral wire or the live wire into the horizontal slot 13 is sleeved on the C-shaped rod 4. A rubber sheet 2141 is fixed on the side wall of the pressing block 214 away from the baffle 213. Both the rubber sleeve 41 and the rubber sheet 2141 are made of rubber materials, which have both good soft performance and good insulation performance, reducing the probability of the neutral wire or the live wire being damaged and the occurrence of leakage or short circuit at the wiring point.

[0033] A metering chip (not shown in the figure) is integrated in the leakage current transformer body 1. After the neutral wire and the live wire electrically connected to the charging pile are pressed by the pressing block 214 on the surface of the terminal 12, the metering chip reads the current value collected on the leakage current transformer body 1. If the current value is greater than the preset value, it means that the charging pile has a leakage, and the charging pile should be powered off. A speaker 14 is provided on the housing of the leakage current transformer body 1 (the speaker 14 is electrically connected to the control chip inside the leakage current transformer body 1). A rotating column 5 rotatably connected to the fixing plate 211 is penetrated through the fixing plate 211. An annular gear 51 meshing with the driving gear 223 is fixed at one end of the rotating column 5 close to the baffle 213, and a cover plate 52 for shielding the speaker 14 is fixed at the other end of the rotating column 5 away from the rotating column 5.

[0034] The metering chip is a basic functional component within the leakage current transformer body 1. The leakage current transformer body 1 collects the current output by the charging pile. The metering chip reads the current value collected on the leakage current transformer body 1. If the current value is greater than the preset value, it indicates that the charging pile is leaking electricity. The control chip controls the speaker 14 to emit an alarm to remind the staff, so that the staff can cut off the power of the charging pile.

[0035] The outer diameter of the driving gear 223 is smaller than that of the driven gear 224. When the pressing block 214 on the baffle 213 presses the neutral or live wire tightly into the wiring groove 11, the included angle between the cover plate 52 and the side wall of the housing of the leakage current transformer body 1 is 70 - 100°. A U-shaped rib 15 is fixed at a position on the housing of the leakage current transformer body 1 close to the wiring groove 11. When the pressing block 214 on the baffle 213 presses the neutral or live wire tightly into the wiring groove 11, the side wall on one side of the baffle 213 abuts against the side of the U-shaped rib 15 away from the housing of the leakage current transformer body 1. A circular rib 16 is fixed at a position on the housing of the leakage current transformer body 1 close to the edge of the speaker 14. When the baffle 213 rotates 180° towards the side away from the wiring groove 11, the side wall on one side of the cover plate 52 abuts against the side of the circular rib 16 away from the housing of the leakage current transformer body 1.

[0036] When the baffle 213 is fully closed and the pressing block 214 on the baffle 213 presses the neutral or live wire tightly into the wiring groove 11, the cover plate 52 is in an open state, and the included angle between the cover plate 52 and the side wall of the housing of the leakage current transformer body 1 is 70 - 100°. So that during the process of the leakage current transformer body 1 detecting the charging pile, the alarm sound emitted by the speaker 14 can be heard by the staff in time, so as to cut off the power of the charging pile. When the baffle 213 is fully opened, the side wall on one side of the cover plate 52 abuts against the side of the circular rib 16 away from the housing of the leakage current transformer body 1, and the cover plate 52 is tightly closed, which plays a good protective role for the speaker 14 and reduces the probability of the speaker 14 being damaged by external force during the unused process.

[0037] A winding wheel 6 is fixedly sleeved on the driving rod 221. A fixing strip 61 parallel to the axis of the winding wheel 6 is fixed inside the winding wheel 6. The distance between the fixing strip 61 and the outer wall of the winding wheel 6 is greater than the outer diameters of the live wire and the neutral wire. A fixing bolt 62 threadedly connected to the fixing strip 61 is penetrated through the fixing strip 61. One end of the fixing bolt 62 close to the axis of the winding wheel 6 is fixed with a rubber block (not shown in the figure).

[0038] After the leakage detection of the charging pile is completed, the staff need to open the baffle 213 and remove the live wire and the neutral wire. Subsequently, the staff place the live wire and the neutral wire between the fixing strip 61 and the wire winding wheel 6. After tightening the fixing bolt 62, the live wire and the neutral wire can be fixed. The staff pinch the ends of the neutral wire and the live wire far from the fixing bolt 62. As the motor 222 rotates, the wire winding wheel 6 rotates synchronously with the driving rod 221, so that the neutral wire and the live wire are gradually wound around the wire winding wheel 6, enhancing the neatness of the neutral wire and the live wire when they are not being detected. The setting of the rubber block reduces the probability of the fixing bolt 62 squeezing and damaging the live wire and the neutral wire. To enhance the stability of the neutral wire and the live wire wound around the wire winding wheel 6, a limiting strip 63 parallel to the axis of the wire winding wheel 6 is rotatably installed on the wire winding wheel 6. After the neutral wire and the live wire are wound around the wire winding wheel 6, rotating the limiting strip 63 can limit the neutral wire and the live wire.

[0039] A battery slot 17 is provided on the housing of the leakage current transformer body 1. A C-shaped housing 7 is fixed on the housing of the leakage current transformer body 1 and is arranged around the battery slot 17. One side of the C-shaped housing 7 close to the battery slot 17 is open. A battery cover 8 that is slidably matched with the battery slot 17 and is used to block the battery slot 17 is arranged in the battery slot 17. Fixing blocks 81 are fixed on both sides of the battery cover 8. A spring 82 is fixed between the top of the fixing block 81 and the inner top wall of the C-shaped housing 7. A magnetic attraction block 83 that is magnetically attracted to the inner top wall of the C-shaped housing 7 is fixed on the top of the battery cover 8. An arc-shaped groove 84 is arranged at the intersection between the side of the battery cover 8 close to the battery slot 17 and the bottom of the battery cover 8.

[0040] The battery cover 8 is slidably matched with the C-shaped housing 7. The fixing block 81 on the battery cover 8 is fixed between the inner top wall of the C-shaped housing 7 through the spring 82, and the magnetic attraction block 83 on the battery cover 8 is magnetically attracted to the inner top wall of the C-shaped housing 7. In this way, the battery in the battery slot 17 is limited by the battery cover 8. After the finger is placed in the arc-shaped groove 84, the staff can easily open the battery cover 8, thereby installing and replacing the battery in the battery slot 17, changing the traditional method of fixing the battery cover 8 with screws, reducing the usage frequency of the screwdriver, and eliminating the cumbersome operation of the staff having to carry a screwdriver when installing and replacing the battery.

[0041] In this embodiment, the working principle of a leakage detection device for a charging pile is as follows: When connecting the neutral wire and the live wire electrically connected to the charging pile to the terminal 12 in the wiring slot 11, the staff needs to drive the connecting rod 212 to rotate through the power component 22, so that the baffle 213 is completely opened. After putting the wiring ends of the neutral wire and the live wire electrically connected to the charging pile into the wiring slot 11, drive the connecting rod 212 to rotate in the reverse direction through the power component 22 until the two pressing blocks 214 press the neutral wire and the live wire respectively, then the connection between the neutral wire, the live wire and the terminal 12 can be completed. This changes the way of using wiring bolts for fixation in the traditional technology, avoids the phenomenon of thread slipping, and is beneficial to extending the service life of the leakage detection device for the charging pile.

[0042] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A leakage detection device for a charging pile, comprising a leakage current transformer body (1), characterized in that: There are two wiring grooves (11) provided on the housing of the leakage current transformer body (1). Wiring terminals (12) are embedded in both of the two wiring grooves (11). A pressing mechanism (2) for pressing the neutral wire and the live wire electrically connected to the charging pile onto the two wiring terminals (12) respectively is provided on the housing of the leakage current transformer body (1). The pressing mechanism (2) includes a pressing component (21) and a power component (22). The pressing component (21) includes a fixing plate (211) fixed to the housing of the leakage current transformer body (1), a connecting rod (212) penetrating through the fixing plate (211) and rotatably connected to the fixing plate (211), a baffle (213) fixed to one end of the connecting rod (212) and used for blocking the two wiring grooves (11), and a pressing block (214) fixed to the side wall on one side of the baffle (213) and used for pressing the neutral wire or the live wire. The power component (22) is used to drive the connecting rod (212) to rotate; A U-shaped rod body (3) is fixed to the side wall of the fixing plate (211) close to the wiring groove (11). The power component (22) includes a driving rod (221) penetrating through the vertical section of the U-shaped rod body (3) and rotatably connected, a motor (222) fixed to the vertical section of the U-shaped rod body (3) and used for driving the driving rod (221) to rotate, a driving gear (223) fixed to the end of the driving rod (221) far from the motor (222), and a driven gear (224) fixedly sleeved on the connecting rod (212) and meshing with the driving gear (223).

2. The leakage detection device for a charging pile according to claim 1, wherein: A horizontal linear groove (13) is provided at the position of the housing of the leakage current transformer body (1) close to the bottom of the wiring groove (11). A C-shaped rod body (4) for pressing a part of the neutral wire or the live wire into the horizontal linear groove (13) is fixed at the position of the baffle (213) corresponding to the horizontal linear groove (13).

3. The leakage detection device for a charging pile according to claim 2, characterized in that: A rubber sleeve (41) for pressing a part of the neutral wire or the live wire into the horizontal linear groove (13) is sleeved on the C-shaped rod body (4). A rubber sheet (2141) is fixed to the side wall of the pressing block (214) on the side far from the baffle (213).

4. The leakage detection device for a charging pile according to claim 3, characterized in that: A metering chip is integrated in the leakage current transformer body (1). After the neutral wire and the live wire electrically connected to the charging pile are pressed by the pressing block (214) onto the surface of the wiring terminal (12), the metering chip reads the current value collected on the leakage current transformer body (1). If the current value is greater than the preset value, it indicates that the charging pile has a leakage, and the charging pile should be powered off.

5. The leakage detection device for a charging pile according to claim 4, wherein: A loudspeaker (14) is provided on the housing of the leakage current transformer body (1). A rotating column (5) penetrating through the fixing plate (211) and rotatably connected to the fixing plate (211) is provided on the fixing plate (211). An annular gear ring (51) meshing with the driving gear (223) is fixed to one end of the rotating column (5) close to the baffle (213). A cover plate (52) for blocking the loudspeaker (14) is fixed to the end of the rotating column (5) far from the rotating column (5).

6. The leakage detection device for a charging pile according to claim 5, characterized in that: The outer diameter of the driving gear (223) is smaller than that of the driven gear (224). When the pressing block (214) on the baffle (213) presses the neutral or live wire into the wiring groove (11), the included angle between the cover plate (52) and the side wall of the housing of the leakage current transformer body (1) is 70 - 100°.

7. The leakage detection device for a charging pile according to claim 6, wherein: A U-shaped rib (15) is fixed at a position on the housing of the leakage current transformer body (1) close to the wiring groove (11). When the pressing block (214) on the baffle (213) presses the neutral or live wire into the wiring groove (11), one side wall of the baffle (213) abuts against the side of the U-shaped rib (15) away from the housing of the leakage current transformer body (1). A circular rib (16) is fixed at a position on the housing of the leakage current transformer body (1) close to the edge of the speaker (14). When the baffle (213) rotates 180° towards the side away from the wiring groove (11), one side wall of the cover plate (52) abuts against the side of the circular rib (16) away from the housing of the leakage current transformer body (1).

8. The leakage detection device for a charging pile according to claim 6, characterized in that: A winding wheel (6) is fixedly sleeved on the driving rod (221). A fixing bar (61) parallel to the axis of the winding wheel (6) is fixed inside the winding wheel (6). The distance between the fixing bar (61) and the outer wall of the winding wheel (6) is greater than the outer diameters of the live wire and the neutral wire. A fixing bolt (62) threadedly connected to the fixing bar (61) is penetrated through the fixing bar (61). A rubber block is fixed at one end of the fixing bolt (62) close to the axis of the winding wheel (6).

9. The leakage detection device for a charging pile according to claim 6, wherein: A battery slot (17) is provided on the housing of the leakage current transformer body (1). A C-shaped housing (7) surrounding the battery slot (17) is fixed on the housing of the leakage current transformer body (1). The C-shaped housing (7) is open on one side close to the battery slot (17). A battery cover (8) which is slidably matched with the battery slot (17) and used for shielding the battery slot (17) is arranged in the battery slot (17). Fixing blocks (81) are fixed on both sides of the battery cover (8). A spring (82) is fixed between the top of the fixing block (81) and the inner top wall of the C-shaped housing (7). A magnetic attraction block (83) magnetically attracted to the inner top wall of the C-shaped housing (7) is fixed on the top of the battery cover (8). An arc-shaped groove (84) is arranged at the intersection between one side of the battery cover (8) close to the battery slot (17) and the bottom of the battery cover (8).

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