Electric vehicle charging pile fire extinguishing device

Abstract

The application provides an electric vehicle charging pile fire extinguishing device, and belongs to the technical field of charging pile fire extinguishing. The electric vehicle charging pile fire extinguishing device comprises an electric vehicle charging station, a control cabinet and a charging pile are arranged in the electric vehicle charging station, and the electric vehicle charging station is supported by four groups of uniformly distributed supporting rods. The displacement assembly and the dry powder fire extinguishing unit are arranged, so that the electric vehicle charging pile fire extinguishing device can drive the dry powder fire extinguishing unit to move, the fire position is positioned, and then the fire extinguishing work is performed, the overall fire extinguishing efficiency of the device is ensured, the displacement guide rail is matched with the external shape of the dry powder fire extinguishing unit to ensure the stability of the overall dry powder fire extinguishing unit during movement, the driving mode of the driving screw can further enhance the positioning accuracy of the dry powder fire extinguishing unit during movement, the distance between the dry powder fire extinguishing unit and the fire source is shortened, and the overall fire extinguishing effect of the device is further improved.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing technology for charging piles, and particularly to a fire extinguishing device for electric vehicle charging piles. Background Technology

[0002] Electric vehicles are pure electric vehicles powered by batteries and driven by electric motors. They have become very popular and developed rapidly in recent years. Charging stations are energy replenishment devices for electric vehicles, similar in function to gas pumps at gas stations. They can be fixed to the ground or walls and installed in public buildings and residential parking lots, and can charge various models of electric vehicles by adjusting the voltage and current.

[0003] With economic development and technological progress, the development and popularization of electric vehicles have greatly alleviated traffic pressure caused by dense passenger flow. However, during charging, battery thermal runaway may occur, which may be triggered by factors such as internal short circuit, overcharging, mechanical damage, and high temperature environment. This may lead to local high temperature, smoke, or even fire and explosion, which not only causes serious damage to the vehicle itself, but may also threaten the life and property safety of people and property in the surrounding area. Therefore, corresponding fire extinguishing devices are installed near charging stations to extinguish fire hazards in a timely manner.

[0004] Existing fire extinguishing devices attached to charging piles are generally sensor-based automatic fire extinguishing devices. They are triggered when a high-temperature fire is detected, and dry powder is sprayed out to extinguish the fire. The coverage area of ​​the fire extinguishing device is relatively large, and it is not possible to accurately spray and extinguish the fire source. Even if a mechanism is provided to move the device to improve the fire extinguishing accuracy, the number of fires is relatively small, and the entire fire extinguishing device will be idle for a long time. This will cause the device to move less smoothly during the initial operation and generate greater friction between it and the mechanism that drives it, thereby affecting the overall service life of the device. Therefore, this invention provides a fire extinguishing device for electric vehicle charging piles to meet the needs. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a fire extinguishing device for electric vehicle charging piles. By setting up a displacement component and a lubrication component, the existing fire extinguishing devices can solve the problems of insufficient positioning during the fire extinguishing of electric vehicle charging piles, as well as the problems of insufficient smooth movement and excessive wear after the fire extinguishing device has been inactive for a long time.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A fire extinguishing device for electric vehicle charging piles includes an electric vehicle charging station, which is equipped with a control cabinet and charging piles. The electric vehicle charging station is supported by four sets of evenly distributed support rods. An infrared camera is installed in the electric vehicle charging station to monitor the charging pile assembly area. A displacement component is installed in the electric vehicle charging station above the control cabinet. A lubrication component is installed in the displacement component. A dry powder fire extinguishing unit is installed below the displacement component. The displacement assembly includes a displacement guide rail connected between two sets of support rods near the control cabinet, and a slide is sleeved in the displacement guide rail. The displacement assembly is used to drive the dry powder fire extinguishing unit to move. The lubrication assembly includes transmission plates symmetrically distributed on both sides of the slide block, and the lubrication assembly is used to lubricate the displacement assembly.

[0007] Optionally, end sealing plates are sleeved at both ends of the displacement guide rail, and a fixing seat is fixedly connected to the outside of the end sealing plate. Fixing plates are symmetrically installed on the side of the end sealing plate facing the displacement guide rail. A locking block is fixedly installed on the inner side of the fixing plate, and a locking groove adapted to the shape of the locking block is opened on the outer side of the displacement guide rail.

[0008] Optionally, a servo motor is fixedly mounted on the outside of one of the end-sealing plates. The drive shaft of the servo motor extends to the inside of the displacement guide rail and is fixedly connected to a drive screw. The drive screw is threadedly connected to the slide.

[0009] Optionally, the slide has an oil storage cavity located above the threaded connection position, one end of the transmission plate extends to the inner side of the oil storage cavity and is fixedly connected to an oil pusher plate, and the other end of the transmission plate extends to the outer side of the slide and is fixedly connected to a lubrication ring.

[0010] Optionally, the lubrication ring is annular and divided into upper and lower semicircular regions. The upper half of the lubrication ring has an oil outlet cavity, and the upper half of the lubrication ring contacts the recessed area of ​​the external thread of the drive screw. The oil outlet cavity has evenly distributed oil outlet holes, and the oil outlet cavity is connected to the oil storage cavity through a connecting pipe.

[0011] Optionally, a recycling groove is provided in the lower half of the lubrication ring, a baffle plate is fixedly connected to the outside of the recycling groove, and a sponge block is sleeved in the recycling groove. An installation groove that matches the shape of the baffle plate is provided on the outside of the sponge block.

[0012] Optionally, the connection between the transmission plate and the lubrication ring is S-shaped and has a vertical deformation zone, and the connection between the transmission plate and the slide has a transverse movement zone, and the outside of the slide has a transverse movement opening that matches the shape of the transverse movement zone.

[0013] Optionally, the oil pusher plate has evenly distributed corrugated grooves on the side near the inner wall of the slide block, and an evenly distributed oil passage is provided in the middle of the oil pusher plate.

[0014] Optionally, the area of ​​the opening of the oil outlet near the connecting pipe is smaller than the area of ​​the opening of the oil outlet away from the connecting pipe.

[0015] Optionally, a limiting spring is sleeved in the oil storage cavity between the two sets of oil pusher plates. The end of the limiting spring is fixedly connected to a limiting strip, and a weakening groove is opened on the outside of the limiting spring. A limiting groove that matches the shape of the limiting strip is opened on the outside of the oil pusher plate.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a displacement component and a dry powder fire extinguishing unit, the fire extinguishing device for electric vehicle charging piles can drive the dry powder fire extinguishing unit to move, locate the fire position, and then carry out fire extinguishing work, ensuring the overall fire extinguishing efficiency of the device. The displacement guide rail, in conjunction with the external shape of the dry powder fire extinguishing unit, ensures the stability of the dry powder fire extinguishing unit during the overall movement. At the same time, the driving method of the drive screw can further enhance the positioning accuracy of the dry powder fire extinguishing unit during the movement, shorten the distance between the dry powder fire extinguishing unit and the fire source, and further improve the overall fire extinguishing effect of the device.

[0017] By installing a lubrication component located on the outside of the slide block, when the electric vehicle charging station fire extinguishing device is suddenly put into operation and moved after a long period of inactivity, the lubrication component can generate vibration through the collision between the lubrication ring and the external thread of the drive screw, dripping lubricating oil at the area that the slide block is about to pass through. This reduces the friction experienced by the slide block when passing through that area, allowing the slide block to move smoothly. On the one hand, this avoids obstruction of the slide block's movement, which would affect the overall positioning and movement speed of the device. On the other hand, the reduced friction can also reduce the wear between the structures during the operation of the displacement components, indirectly improving the overall service life of the device.

[0018] By incorporating a lubrication ring, a sponge block, and an oil-pushing plate within the lubrication assembly, the faster the sliding block moves in the electric vehicle charging pile fire extinguishing device, the higher the vibration frequency of the lubrication assembly, and the more lubricating oil is pushed out by the oil-pushing plate in the oil storage chamber. This satisfies the lubrication needs of the sliding block during rapid movement. Furthermore, the lubrication ring, which is circularly encircling the outside of the drive screw, ensures that the lubricating oil fully acts on the outside of the drive screw. Excess lubricating oil dripping down can also fall onto the sponge block. As the lubrication assembly vibrates, the sponge block will also intermittently contact the outside of the drive screw, wiping the lubricating oil on the drive screw. This adapts to different working states of the displacement assembly and improves the overall lubrication effect of the lubrication assembly. Attached Figure Description

[0019] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0020] Figure 1 A three-dimensional structural diagram of a fire extinguishing device for electric vehicle charging stations; Figure 2 This is a schematic diagram of the structure between the displacement guide rail and the dry powder fire extinguishing unit. Figure 3 This is a schematic diagram of the structure between the displacement guide rail and the end sealing plate. Figure 4 This is a schematic diagram of the structure between the slide block and the drive screw. Figure 5 This is a schematic diagram of the internal structure of the slide block; Figure 6 A schematic diagram of the internal cross-section of the oil storage cavity; Figure 7 This is a schematic diagram of the structure between the lubrication ring and the sponge block; Figure 8 This is a schematic diagram of the structure inside the transmission plate; Figure 9 This is a schematic diagram of the external structure of the transmission plate; Figure 10 This is a schematic diagram of the cross-sectional structure of the oil pusher plate at the oil outlet. Figure 11 This is a schematic diagram of the three-dimensional structure of the limiting spring.

[0021] [Figure Labels] 1. Electric vehicle charging station; 2. Control cabinet; 3. Charging pile; 4. Dry powder fire extinguishing unit; 5. Infrared camera; 6. Support rod; 7. Fixing seat; 8. Displacement guide rail; 9. End sealing plate; 10. Fixing plate; 11. Servo motor; 12. Card block; 13. Card slot; 14. Slide seat; 15. Drive screw; 16. Lubricating ring; 17. Sponge block; 18. Connecting pipe; 19. Transmission plate; 20. Oil storage chamber; 21. Limiting spring; 22. Oil outlet chamber; 23. Oil outlet hole; 24. Recycling tank; 25. Baffle plate; 26. Mounting slot; 27. Vertical deformation zone; 28. Pushing plate; 29. ​​Oil outlet; 30. Lateral movement zone; 31. Limiting slot; 32. Weakening slot; 33. Limiting strip; 34. Lateral movement port.

[0022] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0023] The fire extinguishing device for electric vehicle charging piles provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0024] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0025] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0026] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0027] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0028] like Figures 1 to 11As shown, an embodiment of the present invention provides a fire extinguishing device for an electric vehicle charging station, including an electric vehicle charging station 1. The electric vehicle charging station 1 is equipped with a control cabinet 2 and a charging pile 3. The electric vehicle charging station 1 is supported by four sets of evenly distributed support rods 6, and an infrared camera 5 is installed in the electric vehicle charging station 1 to monitor the assembly area of ​​the charging pile 3. The electric vehicle charging station 1 is equipped with a displacement assembly located above the control cabinet 2. The displacement assembly is equipped with a lubrication assembly, and a dry powder fire extinguishing unit 4 is installed below the displacement assembly. The displacement assembly includes a displacement guide rail 8 connected between two sets of support rods 6 near the control cabinet 2. A slide seat 14 is sleeved in the displacement guide rail 8. The displacement assembly is used to drive the dry powder fire extinguishing unit 4. The displacement assembly is used for lubrication. The lubrication system includes transmission plates 19 symmetrically distributed on both sides of the slide block 14. The lubrication system lubricates the displacement assembly. End-sealing plates 9 are fitted at both ends of the displacement guide rail 8. Fixing seats 7 are fixedly connected to the outside of the end-sealing plates 9. Fixing plates 10 are symmetrically installed on the side of the end-sealing plates 9 facing the displacement guide rail 8. A locking block 12 is fixedly installed on the inner side of the fixing plate 10. A slot 13 matching the shape of the locking block 12 is provided on the outer side of the displacement guide rail 8. The end-sealing plates 9 are used to seal both ends of the displacement guide rail 8 and can also be disassembled for regular disassembly and maintenance of the internal mechanisms of the displacement assembly. The side of the locking block 12 facing the end of the fixing plate 10 has an inclined surface for fixing. A notch is provided on the outer side of the end of plate 10 near the end connected to the end sealing plate 9 to weaken its strength. This allows the locking block 12 to slide along the guide surface of the end slope to the outer side of the displacement guide rail 8 when the fixing plate 10 is inserted into it. Simultaneously, the fixing plate 10 deforms at the notch until the locking block 12 moves to the slot 13 and engages with it. This facilitates the installation and fixation of the end sealing plate 9 and the displacement guide rail 8. After the displacement guide rail 8 and the end sealing plate 9 are connected and fixed, they can be secured between the two sets of support rods 6 via the fixing seat 7. The connection between the fixing seat 7 and the support rod 6 is semi-circular. The support rod 6 has a fixing groove at the connection position that matches the fixing seat 7, allowing... The assembly, installation, and disassembly of the entire displacement mechanism are simple and convenient. A servo motor 11 is fixedly installed on the outside of one end sealing plate 9. The drive shaft of the servo motor 11 extends to the inside of the displacement guide rail 8 and is fixedly connected to a drive screw 15. The drive screw 15 is threadedly connected to the slide 14. The servo motor 11 is electrically connected to the control cabinet 2. It can be started after being controlled by the control cabinet 2 and drive the drive screw 15 to rotate through its drive shaft. After the drive screw 15 rotates, it can push the slide 14 along the guide rail 8 through its external thread to move to different positions, thereby enabling the dry powder fire extinguishing unit 4 under the slide 14 to achieve precise fire extinguishing operation for fires in different locations.

[0029] In this embodiment, as Figures 4 to 7As shown, the slide block 14 has an oil storage cavity 20 located above the threaded connection position. One end of the transmission plate 19 extends to the inner side of the oil storage cavity 20 and is fixedly connected to the oil pusher plate 28, while the other end of the transmission plate 19 extends to the outer side of the slide block 14 and is fixedly connected to the lubrication ring 16. During the operation of the drive screw 15, the lubrication ring 16 continuously contacts the protruding part of the drive screw 15 and resets at the recessed position, thereby causing the lubrication ring 16 to repeatedly collide with the drive screw 15 and form a vibration. After the lubrication ring 16 vibrates, the vibration force is transmitted to the oil pusher plate 28 through the transmission plate 19, causing the oil pusher plate 28 to slide in the oil storage cavity 20, pushing the lubricating oil in the oil storage cavity 20 out through the connecting pipe 18, thereby achieving the effect of lubrication of the drive screw 15. The lubrication of the external part of the driving screw 15 is achieved through a ring-shaped lubrication ring 16 divided into upper and lower semi-circular regions. The upper part of the lubrication ring 16 has an oil outlet cavity 22, which contacts the recessed area of ​​the external thread of the driving screw 15. The oil outlet cavity 22 has evenly distributed oil outlet holes 23, and it is connected to the oil storage cavity 20 via a connecting pipe 18. The inner diameter of the upper part of the lubrication ring 16 is smaller than the outer diameter of the protruding thread of the driving screw 15, ensuring effective contact between the lubrication ring 16 and the driving screw 15. The upper part of the lubrication ring 16 is used to be compressed by the protruding thread of the driving screw 15, causing the lubrication ring 16 to move away from the driving screw 15. After moving, it is then subjected to the elastic force of the transmission plate 19. Under the action of the lubricant, the lubricant is reset and re-fits onto the recessed area of ​​the external thread of the drive screw 15. This process repeats, creating a vibration. The lubricant pushed out of the oil storage chamber 20 by the oil pusher plate 28 is input into the oil outlet chamber 22 through the connecting pipe 18 and discharged through the oil outlet hole 23 opened at the oil outlet chamber 22. This lubricates the external area of ​​the drive screw 15 that the slide block 14 is about to pass through. The lower half of the lubrication ring 16 has a recovery groove 24. A baffle plate 25 is fixedly connected to the outside of the recovery groove 24, and a sponge block 17 is sleeved in the recovery groove 24. The outside of the sponge block 17 has an installation groove 26 that matches the shape of the baffle plate 25. During the process of lubricating the drive screw 15, the lower half of the lubrication ring 16 is never in contact with the drive screw. Lubricating oil that does not drip onto the outside of the drive screw 15 can fall onto the outside of the mounting groove 26. As the lubrication ring 16 vibrates, the mounting groove 26 will also indirectly contact the outside of the drive screw 15. This, combined with the lubricating oil dripping directly from the oil outlet 23, lubricates the outside of the drive screw 15, further improving the lubrication effect. Lubricating oil accumulated in the sponge block 17 beyond its absorption capacity can be stored in the recovery tank 24. The baffle 25 outside the recovery tank 24 can block the external opening of the recovery tank 24, reducing its size and preventing the lubricating oil collected in the recovery tank 24 from splashing out due to vibration. At the same time, the baffle 25 can also prevent the sponge block 17 from being installed inside the lubrication ring 16.The mounting groove 26 on the outside of the sponge block 17 is snapped into place, thus providing auxiliary fixation for the sponge block 17. This ensures easy installation and removal of the sponge block 17 within the lubrication ring 16, while also guaranteeing the fixed position of the sponge block 17 during operation.

[0030] In this embodiment, as Figures 6 to 10 As shown, the connection between the transmission plate 19 and the lubrication ring 16 is S-shaped and has a vertical deformation zone 27. The connection between the transmission plate 19 and the slide block 14 has a transverse movement zone 30. The slide block 14 has a transverse movement opening 34 on its exterior that matches the shape of the transverse movement zone 30. The vertical deformation zone 27 on the exterior of the transmission plate 19 allows the transmission plate 19 to be thinner at that location, making it easier to deform. This allows the lubrication ring 16 to deform at that location after being compressed by the protruding threads on the exterior of the drive screw 15, and causes the lubrication ring 16 to move vertically. Simultaneously, when the lubricating ring 16 vibrates, the transverse movable area 30 of the transmission plate 19 can slide relative to the transverse movable opening 34, thereby enabling the lubricating ring 16 and the transmission plate 19 to generate horizontal displacement, which cooperates with the vertical deformation area 27 to meet the complex displacement requirements of the lubricating ring 16 throughout the entire vibration process. At the same time, the area on the transmission plate 19 where the transverse movable area 30 is provided forms a groove, and the inner sidewall of the transverse movable area 30 can contact the outside of the slide block 14 after the transmission plate 19 moves to a certain extent, thereby limiting the overall movement range of the transmission plate 19. The pusher plate 28 has evenly distributed corrugated grooves on one side near the inner wall of the slide block 14, and an evenly distributed oil passage 29 is provided in the middle of the pusher plate 28. The corrugated grooves on the pusher plate 28 increase the surface area of ​​the pusher plate 28 in that area, and at the same time make the structure of the pusher plate 28 in that area wavy and uneven, which makes the fluctuation effect of the lubricating oil more obvious when the pusher plate 28 pushes the lubricating oil. This facilitates the discharge of lubricating oil through the connecting pipe 18 for lubrication of the drive screw 15. The top end of the connecting pipe 18 is connected to the oil storage cavity 20 below the transverse movable port 34. When the oil storage cavity 20 is filled with lubricating oil, the oil level is not high. At the top of the connecting pipe 18, the lubricating oil will not be discharged through the connecting pipe 18 when the slide 14 is stationary. The middle of the top of the slide 14 is also provided with an oil filling port that communicates with the oil storage chamber 20. The oil filling port is sealed by a sealing cap. The sealing cap is designed to be hidden, and its top is flush with the top of the slide 14 to avoid obstructing the sliding of the slide 14 inside the displacement guide rail 8. The oil passage 29 opened on the oil pusher plate 28 can facilitate the passage of lubricating oil. The edge of the oil pusher plate 28 is in contact with the inner wall of the oil storage chamber 20. During the sliding process inside the oil storage chamber 20, it is limited and guided by the inner wall of the oil storage chamber 20 to ensure the stability of the oil pusher plate 28 in the process of pushing the lubricating oil.

[0031] In this embodiment, as Figures 9 to 11As shown, the area of ​​the opening of the oil passage 29 near the connecting pipe 18 is smaller than the area of ​​the opening of the oil passage 29 away from the connecting pipe 18. During the movement of the oil pusher plate 28 in the oil storage cavity 20, lubricating oil can be poured in through the large opening of the oil passage 29 and flow out through the small opening. The design of the large and small openings of the oil passage 29 allows the amount of lubricating oil entering through the large opening to be greater than the amount of lubricating oil entering through the small opening during the reciprocating motion of the oil pusher plate 28. It is easy for the lubricating oil to flow into the space formed between the inner wall of the oil storage cavity 20 near the connecting pipe 18 and the oil pusher plate 28. Then, it is pushed by the oil pusher plate 28 to form a fluctuating state. The bottom end of the oil passage 29 extends to the bottom of the oil pusher plate 28. Even if the level of lubricating oil in the oil storage cavity 20 drops with the discharge of lubricating oil, it can still be connected to both sides of the oil pusher plate 28 through the oil passage 29. A limiting spring 21 is fitted in the oil reservoir 20 between two sets of oil-pushing plates 28. A limiting strip 33 is fixedly connected to the end of the limiting spring 21, and a weakening groove 32 is formed on the outside of the limiting spring 21. A limiting groove 31, matching the shape of the limiting strip 33, is formed on the outside of the oil-pushing plate 28. The limiting spring 21 in the oil reservoir 20 restricts the position of the oil-pushing plate 28 within the oil reservoir 20. When the lubricating ring 16 vibrates and drives the oil reservoir 20 to move via the transmission plate 19, the limiting spring 21 deforms at the weakening groove 32 due to the movement of the oil-pushing plate 28. The elastic force generated by its deformation promotes the reset of the oil-pushing plate 28, allowing it to reciprocate and push the lubricating oil. The transmission plate 19 also enables the moved lubricating ring 16 to reset, and this reciprocating motion continues. The shaking action ensures the working state of the entire lubrication assembly. The limiting spring 21 is X-shaped, with its end bending inward. The weakening groove 32 on the limiting spring 21 makes the thickness of the limiting spring 21 weaker at this point, allowing it to deform under external pressure. The limiting strip 33 at the end of the limiting spring 21 is fitted into the limiting groove 31 outside the oil pushing plate 28, and the length of the limiting strip 33 is greater than the height of the limiting spring 21, thus connecting the limiting spring 21 with the oil pushing plate 28. This allows the limiting spring 21 to be guided by the oil pushing plate 28 and the limiting groove 31 when it deforms, preventing misalignment during deformation. It also provides auxiliary guidance to the oil pushing plate 28 through the limiting spring 21, ensuring the stability of the operation of the limiting spring 21 and the oil pushing plate 28.

[0032] The working principle provided by this invention is as follows: During use, the infrared camera 5 monitors the electric vehicles charging in the electric vehicle charging station 1 via the charging pile 3. When a fire occurs, the charging pile 3 determines the location of the fire, and the control cabinet 2 controls the servo motor 11 and the dry powder fire extinguishing unit 4 to work. The servo motor 11 drives the drive screw 15 to rotate through its drive shaft. The drive screw 15 pushes the slide 14 to move along the guide rail 8 to the fire location. During the movement of the slide 14, the upper part of the lubrication ring 16 collides with the external thread of the drive screw 15 and vibrates under the action of the external thread of the drive screw 15. The vibration is transmitted to the oil storage chamber 2 through the transmission plate 19. At point 28 in the 0, the pusher plate 28 reciprocates under the combined action of the transmission plate 19 and the limiting spring plate 21. During the movement, the pusher plate 28 pushes up the lubricating oil in the oil storage chamber 20 and pushes the agitated lubricating oil to the connecting pipe 18, so that the lubricating oil is input into the oil chamber 22 through the connecting pipe 18, and then drips out through the oil outlet hole 23 on the oil outlet chamber 22, falling onto the drive screw 15, lubricating the outside of the drive screw 15 that the slide 14 is about to pass through, until the slide 14 moves to the position of the control cabinet 2. Then the dry powder fire extinguishing unit 4 is activated and sprays dry powder at the fire location until the fire is extinguished, completing the working process of the entire electric vehicle charging pile fire extinguishing device.

[0033] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fire extinguishing device for an electric vehicle charging station, comprising an electric vehicle charging station, wherein the electric vehicle charging station is equipped with a control cabinet and a charging pile, the electric vehicle charging station is supported by four sets of evenly distributed support rods, and an infrared camera monitoring the assembly area of ​​the charging pile is installed in the electric vehicle charging station; a displacement assembly is installed above the control cabinet in the electric vehicle charging station, and a dry powder fire extinguishing unit is installed below the displacement assembly; the displacement assembly includes a displacement guide rail connected between two sets of support rods near the control cabinet, a slide is sleeved in the displacement guide rail, a servo motor is fixedly installed on the outside of an end cap plate, the drive shaft of the servo motor extends to the inside of the displacement guide rail and is fixedly connected to a drive screw, the drive screw is threadedly connected to the slide to drive the dry powder fire extinguishing unit to move, characterized in that: The slide has an oil storage cavity located above the threaded connection between the drive screw and the slide. The slide has symmetrical transmission plates on both sides. One end of the transmission plate extends into the oil storage cavity and is fixedly connected to an oil pusher plate. The other end of the transmission plate extends out of the slide and is fixedly connected to a lubrication ring surrounding the drive screw. The lubrication ring is divided into upper and lower semicircular regions. The upper region of the lubrication ring has an oil outlet cavity that contacts the recessed area of ​​the external thread of the drive screw. The inner diameter of the upper region is smaller than the outer diameter of the external protruding thread of the drive screw. The oil outlet cavity has evenly distributed oil outlet holes and is connected to the oil storage cavity through a connecting pipe. The lower region of the lubrication ring has a recovery groove. A baffle plate is fixedly connected to the outside of the recovery groove. A sponge block is sleeved in the recovery groove. The outside of the sponge block has an installation groove that matches the baffle plate. The connection between the transmission plate and the lubrication ring is S-shaped and has a vertical deformation zone. The connection between the transmission plate and the slide has a lateral movement zone. The slide has a lateral movement opening on its exterior that matches the lateral movement zone. A limiting spring is provided in the oil storage cavity between the two sets of oil pushing plates. The limiting spring is X-shaped and has a weakening groove. A limiting strip is fixedly connected to the end of the limiting spring. The oil pushing plate has a limiting groove on its exterior that matches the limiting strip. This allows the protruding thread of the drive screw to periodically squeeze the lubrication ring when driving the slide to move. The transmission plate then drives the oil pushing plate to reciprocate under the elastic reset action of the limiting spring.

2. The fire extinguishing device for electric vehicle charging piles according to claim 1, characterized in that, The pusher plate has evenly distributed corrugated grooves on the side near the inner wall of the slide block, and an evenly distributed oil passage is provided in the middle of the pusher plate. The area of ​​the oil passage opening on the side near the connecting pipe is smaller than the area of ​​the oil passage opening on the side away from the connecting pipe. The top end of the connecting pipe is connected to the oil storage cavity at a position below the transverse movable port. The lubricating oil level in the oil storage cavity is not higher than the top end of the connecting pipe, and the edge of the pusher plate is in contact with the inner wall of the oil storage cavity.

3. The fire extinguishing device for electric vehicle charging piles according to claim 1 or 2, characterized in that, The displacement guide rail has end caps fitted at both ends. A fixing seat is fixedly connected to the outside of the end cap. A fixing plate is symmetrically installed on the side of the end cap facing the displacement guide rail. A locking block is fixedly installed on the inner side of the fixing plate. A locking groove that matches the locking block is opened on the outer side of the displacement guide rail. A bevel is provided on the side of the locking block facing the end of the fixing plate. A notch for forming elastic deformation is opened on the outer side of the end of the fixing plate near the end cap.

Images