Charging gun head cleaning device for single-gun charging pile

Abstract

The utility model discloses a single-gun charging pile charging gun head cleaning device which comprises a charging gun head and a sleeve, a first air inlet is formed in the side wall, away from the charging gun head, of the sleeve, a first one-way valve is installed on the first air inlet, a piston plate is slidably connected into the sleeve, and a locking cylinder is fixedly connected to the outer side of the piston plate. The locking cylinder is used for locking and placing the charging gun head, a movable dust blowing device is installed on the piston plate and moves in the axial direction of the charging gun head inserting groove so as to completely clean the charging gun head inserting groove, and an extrusion dust suction device is arranged in the locking cylinder and used for sucking out dust-containing gas in the charging gun head inserting groove. And an exhaust device is arranged on the piston plate and is used for exhausting the sucked dust-containing gas to the air. The air outlet end of the movable dust blowing device moves from the opening of the charging gun head slot to the bottom, a better cleaning effect on the side wall and the bottom of the slot is achieved, dust-containing gas in the slot is exhausted into air by extruding the dust suction device, and the cleaning effect is better.

Description

A cleaning device for the charging gun head of a single-gun charging station Technical Field

[0001] This utility model relates to the field of charging gun head cleaning technology, and in particular to a single-gun charging pile charging gun head cleaning device. Background Technology

[0002] With the development of society, the number of electric vehicles is increasing, and the number of charging stations is also increasing to serve electric vehicles. Most charging stations are self-service, without dedicated staff to clean and maintain the charging gun heads. If the charging gun heads are contaminated, it can easily lead to poor contact when the charging gun heads are plugged into the car, resulting in charging interruption and even safety hazards. Therefore, it is necessary to design a cleaning device that makes it easy to clean the charging gun heads.

[0003] Chinese patent CN208555306U discloses a press-type charging gun head cleaning device, which fixes the charging gun head on the annular cylinder of the piston, pushes the piston to move, squeezes the gas in the cylinder, and blows out the high-pressure gas from the small hole on the piston to clean the inner wall of the slot and the electrode needles on the charging gun head.

[0004] However, in the above scheme, after the charging gun head is fixed on the piston's annular cylinder, the position of the small hole relative to the slot on the charging gun head no longer changes. In the depth direction of the slot, the gas always blows from the opening end of the slot to the bottom. The top of the electrode needles in the slot can be cleaned well by blowing. However, in the deeper space at the bottom of the slot, due to the increased distance from the small hole, it is not possible to blow well, and the cleaning effect is weakened. At the same time, when using high-pressure airflow to blow away the dust in the charging gun head slot, the dust-laden gas generated remains in the space formed by the charging gun head slot and the piston plate, which is not easy to expel, resulting in incomplete cleaning. Summary of the Invention

[0005] In view of the above-mentioned prior art, the present invention provides a single-gun charging station charging gun head cleaning device. When the charging gun head is fixedly placed in the locking cylinder, as the piston plate moves, it squeezes the gas in the sleeve. The gas is blown out from the air outlet of the moving dust blowing device, and the air outlet of the moving dust blowing device goes deeper and deeper into the slot of the charging gun head, reducing the distance between the air outlet and the side wall of the charging gun head slot, thus ensuring the cleaning effect. During the movement of the piston plate, the squeezing dust suction device squeezes from the opening end of the slot to the bottom of the slot, expelling the dust-laden gas from the space formed by the piston plate and the charging gun head slot.

[0006] To achieve the above objectives, the technical solution of this utility model embodiment is implemented as follows:

[0007] A single-gun charging station charging gun head cleaning device includes a charging gun head and a sleeve. A first air inlet is provided on the side wall of the sleeve away from the charging gun head, and a first one-way valve is installed on the first air inlet. A piston plate is slidably connected inside the sleeve, and a locking cylinder is fixedly connected to the outer surface of the piston plate. The locking cylinder is used to lock and place the charging gun head. Several movable dust blowing devices are installed on the piston plate. The movable dust blowing devices move along the axial direction of the charging gun head slot to completely clean the slot of the charging gun head. A squeezing dust suction device is provided inside the locking cylinder to suck out the dust-containing gas in the charging gun head slot. An exhaust device is provided on the piston plate to discharge the sucked-out dust-containing gas into the air.

[0008] Furthermore, the mobile dust blowing device includes a blow pipe, one end of which is fixedly connected to the side wall of the sleeve away from the charging gun head, and the other end of which passes through the piston plate and is slidably connected to the piston plate. A second air inlet is provided on the end of the blow pipe away from the charging gun head, and multiple dust blowing holes are provided on the end of the blow pipe near the charging gun head. The second air inlet and the dust blowing holes are located on both sides of the piston plate, respectively. A second one-way valve is provided inside the blow pipe, and the second one-way valve is located between the second air inlet and the dust blowing holes.

[0009] Furthermore, the extrusion dust collection device includes an extrusion plate located inside the locking cylinder and parallel to the piston plate. The radius of the extrusion plate is consistent with the inner diameter of the charging gun head slot. A blowpipe passes through the extrusion plate and is fixedly connected to it. Dust blowing holes and a second air inlet are located on both sides of the extrusion plate. Several through holes are provided on the extrusion plate for the electrode needles inside the charging gun head slot to pass through. An air intake is also provided on the extrusion plate, and a third one-way valve is installed on the air intake. Dust-laden gas inside the charging gun head slot enters the space between the extrusion plate and the piston plate through the air intake.

[0010] Furthermore, the exhaust device includes an exhaust pipe embedded in the piston plate. The two outlets of the exhaust pipe are located on the outer surface of the piston plate. The two outlets of the exhaust pipe are located on both sides of the side wall of the locking cylinder to discharge the dust-laden gas between the extrusion plate and the piston plate. A fourth one-way valve is provided inside the exhaust pipe.

[0011] Furthermore, a filter screen is installed on the first air inlet, and the filter screen can be detachably installed on the outer wall of the sleeve.

[0012] Furthermore, an inclined guide plate is installed on the end of the locking cylinder away from the piston plate.

[0013] Furthermore, a limiting block is provided on the inner surface of the side wall of the sleeve, which is used to prevent the piston plate from completely disengaging from the sleeve.

[0014] Furthermore, a return spring is fixedly connected between the side wall of the sleeve away from the charging gun head and the piston plate.

[0015] Furthermore, rubber is provided on the inner surface of the locking cylinder sidewall, the outer ring surface of the extrusion plate, and the inner sidewall surface of the through hole.

[0016] The beneficial effects of this utility model are as follows: during the process of the charging gun head pushing the piston plate to compress the sleeve, the air outlet of the moving dust blowing device goes deeper and deeper into the slot of the charging gun head, gradually blowing and cleaning the side wall and bottom of the slot, thus ensuring the cleaning effect.

[0017] The extrusion plate is fixedly connected to the blow pipe. As the dust blowing hole goes deeper and deeper into the slot of the charging gun head, the dust generated enters the space between the bottom of the charging gun head slot and the extrusion plate. The extrusion plate moves towards the bottom of the charging gun head slot, squeezing the dust-laden gas out between the extrusion plate and the piston plate. As the charging gun head is pulled out, the dust-laden gas leaves the charging gun head, thus achieving a thorough cleaning of the charging gun head slot.

[0018] A filter screen is installed at the first air inlet on the sleeve, ensuring that the air entering the sleeve and blowing through the charging gun head slot is clean, preventing contaminants from being introduced into the cleaning process and guaranteeing stable cleaning results.

[0019] When the charging gun head is fixedly placed inside the locking cylinder, the side wall surface inside the locking cylinder is covered with rubber. This not only protects the outer wall surface of the charging gun head, but also enhances the sealing performance, preventing dust and moisture in the air from entering when the cylinder is not in use. Finally, it increases the friction between the charging gun head and the locking cylinder, making the cylinder more stable. Attached Figure Description

[0020] Figure 1 is a schematic diagram of the overall structure of a single-gun charging pile charging gun head cleaning device of this utility model.

[0021] Figure 2 is a cross-sectional schematic diagram of the dust brushing device of the single-gun charging pile charging gun head cleaning device of this utility model.

[0022] Figure 3 is a schematic diagram of the blow pipe of a single-gun charging pile charging gun head cleaning device of this utility model.

[0023] Figure 4 is a schematic diagram of the extrusion plate structure of a single-gun charging pile charging gun head cleaning device of this utility model.

[0024] Figure 5 is a schematic diagram of the piston plate of a single-gun charging pile charging gun head cleaning device of this utility model.

[0025] Figure 6 is a schematic diagram of the piston plate and extrusion plate of the single-gun charging pile charging gun head cleaning device of this utility model.

[0026] Explanation of reference numerals: 1. Sleeve; 2. Piston plate; 3. Locking cylinder; 4. Extrusion suction device; 5. Moving dust blowing device; 6. First air inlet; 7. Filter screen; 8. First one-way valve; 9. Blowpipe; 10. Second air inlet; 11. Second one-way valve; 12. Dust blowing hole; 13. Guide plate; 14. Limiting block; 15. Return spring; 16. Through hole; 17. Air inlet; 18. Third one-way valve; 19. Exhaust pipe; 20. Charging gun head; 21. Fourth one-way valve; 22. Extrusion plate. Detailed Implementation

[0027] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in this specification of this utility model is for the purpose of describing particular embodiments only and is not intended to limit the utility model. In the following description, the expression "some embodiments" refers to a subset of all possible embodiments; however, it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0028] Referring to Figures 1 to 6, this utility model provides a single-gun charging station charging gun head cleaning device, including a charging gun head 20 and a sleeve 1. A first air inlet 6 is provided on the side wall of the sleeve 1 away from the charging gun head 20. A first one-way valve 8 is installed on the first air inlet 6. A piston plate 2 is slidably connected inside the sleeve 1. A locking cylinder 3 is fixedly connected to the outer surface of the piston plate 2. The locking cylinder 3 is used to lock and place the charging gun head 20. Several movable dust blowing devices 5 are installed on the piston plate 2. The movable dust blowing devices 5 move along the axial direction of the slot of the charging gun head 20 to completely clean the slot of the charging gun head 20. A squeezing dust suction device 4 is provided inside the locking cylinder 3. The squeezing dust suction device 4 is used to suck out the dust-containing gas in the slot of the charging gun head 20. An exhaust device is provided on the piston plate 2. The exhaust device is used to discharge the sucked-out dust-containing gas into the air. In use, insert the charging gun head 20 into the locking cylinder 3 for fixation. Continue to push the charging gun head 20, pressing against the piston plate 2 to move and compress the gas inside the sleeve 1. The first one-way valve 8 on the first air inlet 6 only allows gas to enter the sleeve 1 from the outside along the first air inlet 6. At this time, the compressed gas can only be blown out from the outlet of the movable dust blowing device 5. When the charging gun head 20 just pushes the piston plate 2 to move, the outlet of the movable dust blowing device 5 is at the slot opening of the charging gun head 20. As the charging gun head... As the piston plate 2 continues to move, the air outlet of the moving dust blowing device 5 penetrates deeper and deeper into the slot of the charging gun head 20, enabling better blowing and cleaning of the bottom and inner wall of the slot of the charging gun head 20. As the charging gun head 20 pushes the piston plate 2 to move, the dust blown down floats between the piston plate 2 and the bottom wall of the slot of the charging gun head 20. The squeezing suction device 4 sucks out the dust-laden gas between the piston plate 2 and the bottom wall of the slot of the charging gun head 20 by squeezing, and finally discharges it into the air, ensuring a more thorough cleaning.

[0029] Preferably, the mobile dust blowing device 5 includes a blow pipe 9. One end of the blow pipe 9 is fixedly connected to the side wall of the sleeve 1 away from the charging gun head 20. The other end of the blow pipe 9 passes through the piston plate 2 and is slidably connected to the piston plate 2. A second air inlet 10 is provided on the end of the blow pipe 9 away from the charging gun head 20. A plurality of dust blowing holes 12 are provided on the end of the blow pipe 9 near the charging gun head 20. The second air inlet 10 and the dust blowing holes 12 are located on both sides of the piston plate 2, respectively. A second one-way valve 11 is provided inside the blow pipe 9. The second one-way valve 11 is located between the second air inlet 10 and the dust blowing holes 12. During use, the charging gun head 20 pushes the piston plate 2 to move and compress the gas inside the sleeve 1. The blowpipe 9 is fixedly connected to the sleeve 1 and moves in the opposite direction to the piston plate 2. When the charging gun head 20 pushes the piston plate 2, the dust blowing hole 12 on the blowpipe 9 is always inside the slot of the charging gun head 20, and the dust blowing hole 12 continues to penetrate deeper into the slot. As the charging gun head 20 pushes the piston plate 2, the position of the dust blowing hole 12 inside the slot changes from shallow to deep, continuously blowing and cleaning the inner wall of the slot and the side wall of the electrode needle. When it reaches the bottom of the slot... The bottom of the slot is cleaned by blowing and brushing. The blower pipe 9 has multiple blowing holes 12, some axially positioned and some radially positioned. The axially positioned holes facilitate cleaning the bottom of the slot. As the charging gun head 20 moves, the axially positioned holes get closer to the bottom of the slot, resulting in better cleaning. The radially positioned holes facilitate cleaning the side walls of the slot and the electrode pins. As the charging gun head 20 moves, the radially positioned holes move from shallow to deep within the slot, effectively cleaning the side walls of the slot and the electrode pins. For comprehensive cleaning, the second air inlet 10 is located on the side wall of the blowpipe 9, near the sleeve 1 and away from the charging gun head 20. During the compression and movement of the piston plate 2, the second air inlet 10 remains inside the sleeve 1, on the same side of the piston plate 2. Gas inside the sleeve 1 can always enter the blowpipe 9 through the second air inlet 10. The dust blowing hole 12 on the blowpipe 9 is always located on the other side of the piston plate 2, and gas inside the blowpipe 9 is ejected from the dust blowing hole 12. When the piston plate 2 moves and compresses the gas inside the sleeve 1, the gas inside the sleeve 1 can always be cleaned properly. The gas is normally ejected from the dust blowing hole 12. A second one-way valve 11 is installed inside the blow-blowing pipe 9. When the piston plate 2 compresses the gas in the sleeve 1, the second one-way valve 11 allows the gas to enter the blow-blowing pipe 9 from the second air inlet 10 and then be ejected from the dust blowing hole 12. When the piston plate 2 returns to its original position, the gas cannot enter the blow-blowing pipe 9 from the dust blowing hole 12. This avoids the dust-laden gas after cleaning the charging gun head 20 being sucked into the sleeve 1, which would be detrimental to the subsequent cleaning of the charging gun head 20. If the dust-laden gas enters the sleeve 1, it will affect the normal use of the cleaning device and may block the dust blowing hole 12.

[0030] Preferably, the compression suction device 4 includes a compression plate 22, which is located inside the locking cylinder 3 and parallel to the piston plate 2. The radius of the compression plate 22 is consistent with the inner diameter of the slot of the charging gun head 20. The blow pipe 9 passes through the compression plate 22 and is fixedly connected to the compression plate 22. The dust blowing hole 12 and the second air inlet 10 are located on both sides of the compression plate 22, respectively. Several through holes 16 are provided on the compression plate 22 for the electrode needles in the slot of the charging gun head 20 to pass through. An air intake 17 is also provided on the compression plate 22. A third one-way valve 18 is installed on the air intake 17. The dust-laden gas in the slot of the charging gun head 20 enters the space between the compression plate 22 and the piston plate 2 through the air intake 17. During use, as the blowpipe 9 gradually penetrates deeper into the slot of the charging gun head 20, the extrusion plate 22 moves towards the bottom of the slot. The radius of the extrusion plate 22 is consistent with the inner diameter of the side wall of the charging gun head 20 slot, and the inner diameter of the locking cylinder 3 is consistent with the outer diameter of the side wall of the charging gun head 20 slot. That is, when the charging gun head 20 is inserted into the locking cylinder 3 for fixation, the extrusion plate 22 slides within the slot of the charging gun head 20. As the extrusion plate 22 moves towards the bottom of the slot of the charging gun head 20, the through hole on the extrusion plate 22 allows the electrode needle of the charging gun head 20 to pass through, creating a sealed space between the bottom of the slot of the charging gun head 20 and the extrusion plate 22. As the blowpipe 9 penetrates deeper into the slot of the charging gun head 20, the bottom of the slot of the charging gun head 20 and the extrusion plate 22... The dust-laden gas between the pressure plates 22 is squeezed and enters the space between the pressure plate 22 and the piston plate 2 through the air intake 17 on the pressure plate 22. The third one-way valve 18 on the air intake 17 can effectively prevent the dust-laden gas from flowing back to the bottom of the slot of the charging gun head 20 and the pressure plate 22. Finally, the space between the bottom of the slot of the charging gun head 20 and the pressure plate 22 is reduced to the minimum. Then, the charging gun head 20 is pulled out. Finally, only clean air is supplied from the blow pipe 9 between the bottom of the slot of the charging gun head 20 and the pressure plate 22. Through this process, the dust blown down from the charging gun head 20 enters the gas, and then all the dust-laden gas is squeezed and sucked away, ensuring the cleaning effect on the slot of the charging gun head 20 and preventing the dust-laden gas from settling and re-adhering to the slot of the charging gun head 20.

[0031] Preferably, the exhaust device includes an exhaust pipe 19, which is embedded in the piston plate 2. Both outlets of the exhaust pipe 19 are located on the outer surface of the piston plate 2, and are situated on opposite sides of the side wall of the locking cylinder 3 to discharge dust-laden gas between the extrusion plate 22 and the piston plate 2. A fourth one-way valve 21 is provided inside the exhaust pipe 19. Dust-laden gas between the bottom of the charging gun head 20 slot and the extrusion plate 22 enters the space between the extrusion plate 22 and the piston plate 2 through the suction port 17. When the charging gun head 20 is pulled back, causing the piston plate 2 to return to its original position, the extrusion plate 22 and the piston plate 2 approach each other, compressing the dust-laden gas. The dust-laden gas is discharged into the air through the exhaust pipe 19. Because the exhaust pipe 19 is equipped with the fourth one-way valve 21, the dust-laden gas will not flow back into the space between the extrusion plate 22 and the piston plate 2.

[0032] Preferably, a filter screen 7 is also installed on the first air inlet 6, and the filter screen 7 is detachably installed on the outer wall of the sleeve 1. When the piston plate 2 moves away from the sleeve 1, air is drawn into the sleeve 1 through the first air inlet 6 by negative pressure. The incoming air first passes through the filter screen 7 to remove dust, which not only prevents dust from entering the sleeve 1 and affecting the normal use of the cleaning device, and prevents dust from clogging the blow pipe 9, but also avoids using dusty gas to clean the charging gun head 20, ensuring the cleaning effect.

[0033] Preferably, an inclined guide plate 13 is installed on the end of the locking cylinder 3 away from the piston plate 2. By setting the guide plate 13, the charging gun head 20 is guided to smoothly insert into the locking cylinder 3, saving time.

[0034] Preferably, a limiting block 14 is provided on the inner surface of the side wall of the sleeve 1. The limiting block 14 is used to prevent the piston plate 2 from completely disengaging from the sleeve 1. The limiting block 14 can effectively prevent the piston plate 2 from disengaging from the sleeve 1, improving the stability of the cleaning device. A limiting post can also be provided on the inner wall of the sleeve 1. When the piston plate 2 moves toward the sleeve 1, it will pass through the limiting post first, preventing the piston plate 2 from moving too far. When the piston plate 2 moves to compress the sleeve 1, it stops compressing when it hits the limiting post. The moving distance of the piston plate 2 is less than or equal to the depth of the slot, avoiding the blow pipe 9 from colliding with the bottom of the slot and being damaged.

[0035] Preferably, a return spring 15 is fixedly connected between the side wall of the sleeve 1 away from the charging gun head 20 and the piston plate 2. When the piston plate 2 is manually compressed and moved into the sleeve 1 for cleaning and dust removal, the piston plate 2 returns to its original position under the action of the return spring. Gas is automatically replenished into the sleeve 1 through the first air inlet 6. During this process, the charging gun head 20 returns to its original position along with the piston plate 2 and the locking cylinder 3. During this process, the distance between the extrusion plate 22 and the piston plate 2 decreases, discharging the dust-laden gas between the extrusion plate 22 and the piston plate 2 into the air. In other words, each time the charging gun head 20 is inserted into the locking cylinder 3 and the piston plate 2 is compressed inward, a return spring 15 is applied to the charging gun head 20. The slot is cleaned, and after releasing the handle, the charging gun head 20 remains fixed in the locking cylinder 3. During the process of the charging gun head 20 and the locking cylinder 3 returning to their original positions, the dust-laden gas is discharged. There is no need to manually pull the charging gun head 20 outward, saving effort. In cases where multiple blow-brush cleanings are required for thorough cleaning, manually pulling the charging gun head 20 can easily cause it to detach from the locking cylinder 3. With the return spring 15, only pressing is needed, and the piston plate 2 automatically returns under the action of the return spring 15 to squeeze and discharge dust, making the cleaning process more stable.

[0036] Preferably, rubber is provided on the inner surface of the locking cylinder 3 sidewall, the outer ring surface of the extrusion plate 22, and the inner sidewall surface of the through hole 16. The rubber on the inner sidewall surface of the locking cylinder 3 can effectively protect the outer wall surface of the charging gun head 20, the rubber on the outer surface of the extrusion plate 22 ensures a good seal between the extrusion plate 22 and the inner wall of the charging gun head 20, and the rubber on the sidewall surface of the through hole 16 ensures a good seal between the extrusion plate 22 and the electrode needle, reducing damage to the charging gun head 20 and preventing dust-laden gas from flowing back into the charging gun head 20 when the piston plate 2 returns to its original position.

[0037] Working principle: The charging gun head 20 is inserted and fixed inside the locking cylinder 3. As the piston plate 2 continues to be pushed towards the sleeve 1 for compression, the blow pipe 9 slides relative to the piston plate 2. The dust blowing holes 12 on the blow pipe 9 penetrate deeper and deeper into the slot of the charging gun head 20. During this process, the radial holes in the dust blowing holes 12 continuously remove dirt from the inner wall of the slot and the insulating sidewall of the electrode needle, achieving thorough cleaning from shallow to deep. Meanwhile, the axial holes in the dust blowing holes 12 get closer and closer to the bottom of the slot, resulting in better dust removal. During this process, the extrusion plate 22 is fixedly connected to the blow pipe 9. As the dust blowing holes 12 penetrate deeper into the slot, the extrusion plate 22 and the slot are... The dust-laden gas between the bottom is squeezed and discharged into the space between the extrusion plate 22 and the piston plate 2. Under the action of the return spring 15, the charging gun head 20 and the piston plate 2 return to their original positions. During this process, the space between the piston plate 2 and the extrusion plate 22 decreases, and the dust-laden gas between the piston plate 2 and the extrusion plate 22 is squeezed and discharged into the air through the exhaust pipe 19. During this process, the air passes through the filter screen 7 to remove dust, and the clean air enters the sleeve 1 through the first air inlet 6 to fill the space between the extrusion plate 22 and the bottom of the slot. By repeating the above process and pressing multiple times, the dust removal by blowing and the dust removal by extrusion can be achieved, thus achieving the effect of cleaning the charging gun head 20.

[0038] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. The protection scope of this utility model should be determined by the protection scope of the stated claims.

Claims

1. A cleaning device for the charging gun head of a single-gun charging station, comprising a charging gun head (20), characterized in that: It also includes a sleeve (1), on which a first air inlet (6) is provided on the side wall away from the charging gun head (20). A first one-way valve (8) is installed on the first air inlet (6). A piston plate (2) is slidably connected inside the sleeve (1). A locking cylinder (3) is fixedly connected to the outer surface of the piston plate (2). The locking cylinder (3) is used to lock and place the charging gun head (20). Several movable dust blowing devices (5) are installed on the piston plate (2). The movable dust blowing devices (5) move along the axial direction of the charging gun head (20) slot to completely clean the slot of the charging gun head (20). A squeezing dust suction device (4) is provided inside the locking cylinder (3). The squeezing dust suction device (4) is used to suck out the dust-containing gas in the slot of the charging gun head (20). An exhaust device is provided on the piston plate (2). The exhaust device is used to discharge the sucked-out dust-containing gas into the air.

2. The single-gun charging station charging gun head cleaning device according to claim 1, characterized in that: The mobile dust blowing device (5) includes a blow pipe (9). One end of the blow pipe (9) is fixedly connected to the side wall of the sleeve (1) away from the charging gun head (20). The other end of the blow pipe (9) passes through the piston plate (2) and is slidably connected to the piston plate (2). A second air inlet (10) is provided on the end of the blow pipe (9) away from the charging gun head (20). A plurality of dust blowing holes (12) are provided on the end of the blow pipe (9) close to the charging gun head (20). The second air inlet (10) and the dust blowing holes (12) are located on both sides of the piston plate (2). A second one-way valve (11) is provided inside the blow pipe (9). The second one-way valve (11) is located between the second air inlet (10) and the dust blowing holes (12).

3. The single-gun charging station charging gun head cleaning device according to claim 2, characterized in that: The extrusion dust collection device (4) includes an extrusion plate (22), which is located inside the locking cylinder (3) and parallel to the piston plate (2). The radius of the extrusion plate (22) is consistent with the inner diameter of the slot of the charging gun head (20). The blow pipe (9) passes through the extrusion plate (22) and is fixedly connected to the extrusion plate (22). The dust blowing hole (12) and the second air inlet (10) are located on both sides of the extrusion plate (22). The extrusion plate (22) has several through holes (16) for the electrode needles in the slot of the charging gun head (20) to pass through. The extrusion plate (22) also has an air intake (17) with a third one-way valve (18) installed on it. The dust-laden gas in the slot of the charging gun head (20) enters the space between the extrusion plate (22) and the piston plate (2) through the air intake (17).

4. The single-gun charging station charging gun head cleaning device according to claim 3, characterized in that: The exhaust device includes an exhaust pipe (19), which is embedded in the piston plate (2). The two outlets of the exhaust pipe (19) are located on the outer surface of the piston plate (2). The two outlets of the exhaust pipe (19) are located on both sides of the side wall of the locking cylinder (3) to discharge the dust-laden gas between the extrusion plate (22) and the piston plate (2). A fourth one-way valve (21) is provided inside the exhaust pipe (19).

5. A single-gun charging station charging gun head cleaning device according to claim 1, characterized in that: A filter screen (7) is also installed on the first air inlet (6), and the filter screen (7) is detachably installed on the outer wall of the sleeve (1).

6. The single-gun charging station charging gun head cleaning device according to claim 1, characterized in that: An inclined guide plate (13) is installed on the end of the locking cylinder (3) away from the piston plate (2).

7. A single-gun charging station charging gun head cleaning device according to claim 1, characterized in that: The inner surface of the side wall of the sleeve (1) is provided with a limiting block (14), which is used to prevent the piston plate (2) from completely disengaging from the sleeve (1).

8. A single-gun charging station charging gun head cleaning device according to claim 1, characterized in that: A return spring (15) is fixedly connected between the side wall of the sleeve (1) away from the charging gun head (20) and the piston plate (2).

9. A single-gun charging station charging gun head cleaning device according to claim 1, characterized in that: Rubber is provided on the inner surface of the side wall of the locking cylinder (3), the outer ring surface of the extrusion plate (22), and the inner side wall surface of the through hole (16).

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