A charging pile automatic cooling and fire extinguishing device

Abstract

This invention discloses an automatic cooling and fire extinguishing device for charging piles, belonging to the field of charging pile technology. It includes a charging pile body, with a hollow telescopic tube fixedly installed on the outer surface of the charging pile body. An exchange component is located inside the charging pile body, and an opening and closing component is located on the outer surface of the exchange component. The telescopic tube is fixedly connected to the outer surface of the opening and closing component. An extension component is also provided on the charging pile body. A flame sensor is fixedly installed on the inner wall of the charging pile body. Through the synchronous meshing of a ring rack and multiple adapter gears in the opening and closing component, the rotational power of a second motor is rapidly converted into the synchronous rotation and expansion of multiple fan-shaped opening and closing blocks, achieving transient large-area coverage similar to an explosive circular tabletop. Simultaneously, in conjunction with the telescopic tube, the fire extinguishing agent outlet is precisely pushed to the vicinity of the fire point, effectively shortening the delivery distance of the fire extinguishing agent and reducing diffusion loss, significantly improving the fire extinguishing response speed and the utilization efficiency of the fire extinguishing agent.

Description

Technical Field

[0001] This invention relates to the field of charging pile technology, and more specifically, to an automatic cooling and fire extinguishing device for charging piles. Background Technology

[0002] With the rapid development of the new energy vehicle industry, charging piles have been deployed on a large scale as supporting infrastructure. Charging piles involve high voltage and high current during operation, and their internal electronic components and electrical circuits may generate high temperatures and cause electrical fires due to overload, short circuits, aging, or other reasons. Meanwhile, during the charging process of electric vehicles, the internal chemical reactions of the battery are active, and the battery temperature rises sharply in fast charging mode, which can easily cause lithium dendrites to pierce the separator, leading to short circuits and ultimately thermal runaway.

[0003] Patent CN118698069A discloses an automatic power-off and fire-extinguishing device for charging piles, belonging to the field of charging pile technology. It includes: a detection device, an activation device, a fire-extinguishing device, and a wireless power-off device. The detection device is installed on the inner walls of both sides of the charging pile and includes a temperature sensor and a smoke sensor to detect the temperature and smoke conditions inside the charging pile. The activation device is connected to both the detection device and the fire-extinguishing device. The activation device receives the detection data from the detection device and, when the detection indicates a fire inside the charging pile, activates the fire-extinguishing device to extinguish the fire. The fire-extinguishing device is installed on the inner bottom wall of the charging pile and can extinguish fires inside the charging pile. The wireless power-off device is connected to both the detection device and the main power switch of the charging pile. The wireless power-off device receives the detection data from the detection device and, when the detection indicates a fire inside the charging pile, controls the main power switch of the charging pile to disconnect, thus putting the charging pile in a power-off state.

[0004] Although the device has many beneficial effects, existing charging pile fire extinguishing devices still have significant shortcomings in terms of response speed, coverage accuracy, fire source isolation, and differentiated handling for different types of fires. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an automatic cooling and fire extinguishing device for charging piles, which solves the aforementioned problems.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an automatic cooling and fire extinguishing device for charging piles, comprising a charging pile body, wherein multiple heat dissipation holes are provided on both outer surfaces of the charging pile body at equal intervals, a hollow telescopic tube is fixedly installed on the outer surface of the charging pile body, an exchange component is provided inside the charging pile body, an opening and closing component is provided on the outer surface of the exchange component, the telescopic tube is fixedly connected to the outer surface of the opening and closing component, an extension component is provided inside the charging pile body, and a flame sensor is fixedly installed on the inner wall of the charging pile body;

[0009] The switching component includes a housing, a transmission pipe, and through holes. The charging pile body has a hollow housing fixedly connected inside. The top of the housing has two through holes, and the top of each of the two through holes is fixedly connected to a hollow transmission pipe.

[0010] Preferably, the housing is movably connected to a movable rod, and a blocking block is fixedly connected to the top of each of the two movable rods. Both blocking blocks are in movable contact with the inner wall of the corresponding through hole.

[0011] Preferably, two rotating disks are rotatably connected between the inner walls of both sides of the charging pile body, and a connecting shaft is fixedly connected between the two rotating disks. A connecting rod is rotatably connected to the outer surface of each of the two rotating disks, and the two connecting rods are rotatably connected to the outer surface of the corresponding moving rod. The positions of the two connecting rods are staggered. A protective box is fixedly installed on the outer surface of the charging pile body, and a drive motor is fixedly installed inside the protective box. The output end of the drive motor is fixedly connected to the connecting shaft.

[0012] Preferably, the opening and closing assembly includes an annular rack, an opening and closing block, a connecting plate, and a transition gear. The outer surface of the housing has a slot, and the connecting plate is fixedly connected to the outer surface of the housing. Multiple annular transition gears are rotatably connected to the outer surface of the connecting plate, and an annular rack is rotatably connected to the outer surface of the connecting plate. The multiple transition gears mesh with the annular rack, and the top of each of the multiple transition gears is fixedly connected to an opening and closing block.

[0013] Preferably, a drive gear is rotatably connected to the outer surface of the connecting plate, a bracket is fixedly connected to the outer surface of the connecting plate, a second motor is fixedly installed on the outer surface of the bracket, the output end of the second motor is fixedly connected to the drive gear, and the drive gear meshes with a ring rack.

[0014] Preferably, the plurality of opening and closing blocks are arranged in a fan shape, or the plurality of opening and closing blocks are combined to form a circle, the outer surface of the connecting plate is fixedly connected to the telescopic tube, and the plurality of opening and closing blocks are located inside the telescopic tube.

[0015] Preferably, the extension assembly is disposed at the power supply line. The extension assembly includes a driven gear, a support frame, and fixed rods. The support frame is fixedly connected inside the charging pile body. The driven gear is rotatably connected to the outer surface of the support frame. Three annularly distributed fixed rods are fixedly connected to the outer surface of the driven gear. Connecting rings are movably sleeved on the outer surfaces of the three fixed rods. A third connecting rod is rotatably connected to the outer surface of the support frame. A second connecting rod is rotatably connected to the outer surface of the third connecting rod. A first connecting rod is rotatably connected to the outer surface of the second connecting rod. The first, second, and third connecting rods are all rotatably connected to their corresponding connecting rings.

[0016] Preferably, a drive gear is rotatably connected to the outer surface of the support frame, the drive gear meshes with a driven gear, a first motor is fixedly installed on the outer surface of the support frame opposite to the drive gear, the output end of the first motor is fixedly connected to the drive gear, and fire extinguishing blocks are fixedly connected to the outer surfaces of the plurality of connecting rings.

[0017] Preferably, the outer surface of each of the fire extinguishing blocks is provided with silicone-coated fiberglass cloth.

[0018] Preferably, a central controller is fixedly installed on the top of the charging pile body, and the first motor, the second motor, the flame sensor and the drive motor are all controlled by the central controller.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the present invention provides an automatic cooling and fire extinguishing device for charging piles, which has the following beneficial effects:

[0021] 1. The automatic cooling and fire extinguishing device for the charging pile uses the synchronous meshing transmission of the ring rack and multiple connecting gears in the opening and closing assembly to quickly convert the rotational power of the second motor into the synchronous rotation and unfolding of multiple fan-shaped opening and closing blocks, achieving transient large-area coverage similar to an explosive circular tabletop. At the same time, it works with the telescopic tube to accurately push the fire extinguishing agent outlet to the vicinity of the fire point, effectively shortening the delivery distance of the fire extinguishing agent and reducing diffusion loss, significantly improving the fire extinguishing response speed and the utilization efficiency of the fire extinguishing agent.

[0022] 2. The device connects to inert extinguishing gas and chemical suppression extinguishing gas respectively through two independent transmission pipes in the exchange component. The central controller flexibly selects single-channel release or dual-channel spray based on the fire characteristics fed back by the flame sensor. At the same time, it works with the multi-link linkage mechanism in the extension component to drive the extinguishing block to accurately physically cover the ignition point of the power supply line. This forms a differentiated handling capability for conventional electrical fires and lithium battery thermal runaway fires, effectively preventing reignition and avoiding the waste of extinguishing resources. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the charging pile body of the present invention;

[0025] Figure 3 This is a schematic diagram of the switching component structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the blocking block structure of the present invention;

[0027] Figure 5 For the present invention Figure 2 Schematic diagram of the structure at point A in the middle;

[0028] Figure 6 This is a schematic diagram of the second connecting rod structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the drive gear structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the first motor structure of the present invention;

[0031] Figure 9 For the present invention Figure 3 Schematic diagram of the structure at point B;

[0032] Figure 10 This is a schematic diagram of the adapter gear structure of the present invention.

[0033] In the diagram: 1. Charging pile body; 2. Central controller; 3. Heat dissipation hole; 4. Telescopic tube; 5. Exchange component; 501. Box; 502. Transmission tube; 503. Moving rod; 504. Connecting rod; 505. Rotating disk; 506. Through hole; 507. Blocking block; 6. Protective box; 7. Extension component; 701. Driven gear; 702. Connecting ring; 703. Fire extinguishing block; 704. Support frame; 705. First connecting rod; 706. Second connecting rod; 707. Third connecting rod; 708. Drive gear; 709. Fixed rod; 710. First motor; 8. Flame sensor; 9. Opening and closing component; 901. Drive gear; 902. Second motor; 903. Ring rack; 904. Opening and closing block; 905. Connecting plate; 906. Adapter gear. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-10 The present invention provides a technical solution:

[0036] Example 1:

[0037] An automatic cooling and fire extinguishing device for charging piles includes a charging pile body 1. Multiple heat dissipation holes 3 are provided on both outer surfaces of the charging pile body 1 at equal intervals. The device is characterized in that a hollow telescopic tube 4 is fixedly installed on the outer surface of the charging pile body 1, an exchange component 5 is provided inside the charging pile body 1, an opening and closing component 9 is provided on the outer surface of the exchange component 5, the telescopic tube 4 is fixedly connected to the outer surface of the opening and closing component 9, an extension component 7 is provided on the charging pile body 1, and a flame sensor 8 is fixedly installed on the inner wall of the charging pile body 1.

[0038] The switching component 5 includes a housing 501, a transmission pipe 502, and a through hole 506. The hollow housing 501 is fixedly connected inside the charging pile body 1. Two through holes 506 are opened on the top of the housing 501, and the hollow transmission pipe 502 is fixedly connected to the top of each of the two through holes 506.

[0039] The housing 501 is internally connected to a movable rod 503. The top of each movable rod 503 is fixedly connected to a blocking block 507. Both blocking blocks 507 are in contact with the inner wall of the corresponding through hole 506.

[0040] Two rotating disks 505 are rotatably connected between the inner walls of both sides of the charging pile body 1. A connecting shaft is fixedly connected between the two rotating disks 505. A connecting rod 504 is rotatably connected to the outer surface of each of the two rotating disks 505. The two connecting rods 504 are rotatably connected to the outer surface of the corresponding moving rod 503. The positions of the two connecting rods 504 are staggered. A protective box 6 is fixedly installed on the outer surface of the charging pile body 1. A drive motor is fixedly installed inside the protective box 6. The output end of the drive motor is fixedly connected to the connecting shaft.

[0041] The top of the housing 501 has two through holes 506, each with a hollow transmission pipe 502 fixedly connected above it. The two transmission pipes 502 are independent and not interconnected, each connected to a different extinguishing gas storage container. One transmission pipe 502 is connected to an inert extinguishing gas, and the other is connected to a chemically suppressing extinguishing gas. This dual-line independent gas supply design allows the device to flexibly select and release one or both extinguishing gases simultaneously, depending on the type of fire.

[0042] The two transmission pipes 502 deliver two complementary fire extinguishing gases. The inert fire extinguishing gas, typically nitrogen or argon, primarily works by physically reducing the oxygen concentration in the fire area, causing the flames to suffocate due to lack of oxygen. After being sprayed, this gas quickly fills the internal space of the charging station, effectively extinguishing open flames. The chemically suppressing fire extinguishing gas, heptafluoropropane or perfluorohexanone, works by capturing free radicals in the combustion chain reaction, chemically interrupting the combustion reaction. This type of gas has a stronger suppressive effect on deep-seated fires caused by lithium battery thermal runaway, effectively preventing reignition.

[0043] During actual firefighting, the central controller 2 makes a judgment based on the fire characteristic signal fed back by the flame sensor 8 and selects an appropriate firefighting strategy. When the flame sensor 8 detects an initial open flame caused by a short circuit in the internal electrical circuit of the charging pile, the central controller 2 prioritizes activating the transmission pipe 502 connected to the inert fire extinguishing gas. Through the coordinated action of the moving rod 503 and the blocking block 507 in the exchange component 5, the corresponding through hole 506 is opened individually, allowing the inert fire extinguishing gas to be released into the protected area along the transmission pipe 502. When the sensor detects that the fire has spread to the battery pack area or there are signs of thermal runaway, the central controller 2 simultaneously drives both moving rods 503 to open both through holes 506, allowing both types of fire extinguishing gases to be sprayed out simultaneously along the two transmission pipes 502, forming a dual fire extinguishing effect of physical asphyxiation and chemical inhibition.

[0044] Both transmission pipes 502 lead to the area where the opening and closing assembly 9 is located. When the multiple opening and closing blocks 904 of the opening and closing assembly 9 unfold into a circular plane under the drive of the second motor 902, the outlets of the two transmission pipes 502 are located exactly below this circular plane. The two gases are fully mixed as they pass through the gaps between the unfolded opening and closing blocks 904, and then evenly sprayed into the fire area inside the charging pile body 1. This method of mixing before spraying ensures that the two gases are uniformly mixed before reaching the fire source, avoiding blind spots in fire suppression that may be caused by separate spraying.

[0045] Furthermore, the two independent transmission pipes 502 provide the device with a certain degree of redundancy and reliability. If one gas supply system fails or its gas reserves are depleted, the other can still operate independently, ensuring the device does not completely lose its firefighting capability in critical moments. The opening and closing of each transmission pipe 502 is independently controlled by a corresponding moving rod 503 and a blocking block 507. The two moving rods 503 are driven by two staggered connecting rods 504 and rotating disks 505, respectively, without interference. The drive motor simultaneously rotates both rotating disks 505 via a connecting shaft, but the staggered positions of the two connecting rods 504 allow the opening and closing of the two through holes 506 to be controlled independently or synchronously, providing a mechanical basis for flexible adjustments to the firefighting strategy.

[0046] Example 2:

[0047] The opening and closing assembly 9 includes an annular rack 903, an opening and closing block 904, a connecting plate 905, and a transition gear 906. The outer surface of the housing 501 has a slot. The connecting plate 905 is fixedly connected to the outer surface of the housing 501. Multiple annular transition gears 906 are rotatably connected to the outer surface of the connecting plate 905. The annular rack 903 is rotatably connected to the outer surface of the connecting plate 905. The multiple transition gears 906 mesh with the annular rack 903. The top of each of the multiple transition gears 906 is fixedly connected to the opening and closing block 904.

[0048] A drive gear 901 is rotatably connected to the outer surface of the connecting plate 905. A bracket is fixedly connected to the outer surface of the connecting plate 905. A second motor 902 is fixedly installed on the outer surface of the bracket. The output end of the second motor 902 is fixedly connected to the drive gear 901. The drive gear 901 meshes with the ring rack 903.

[0049] Multiple opening and closing blocks 904 are arranged in a fan shape, and multiple opening and closing blocks 904 are combined to form a circle. The outer surface of the connecting plate 905 is fixedly connected to the telescopic tube 4, and multiple opening and closing blocks 904 are located inside the telescopic tube 4.

[0050] The opening / closing assembly 9 is fixedly installed on the outer surface of the housing 501, and its entirety is located within the internal space of the telescopic tube 4. The connecting plate 905, serving as the basic support for the opening / closing assembly 9, is fixedly connected to the outer surface of the housing 501, providing a stable reference for the installation of other components. A ring rack 903 is rotatably connected to the connecting plate 905, allowing free rotation of the ring rack 903 without axial displacement. Multiple adapter gears 906 are equidistantly distributed in a ring on the outer surface of the connecting plate 905, each adapter gear 906 forming a rotatable connection with the connecting plate 905, while simultaneously maintaining meshing with the ring rack 903. An opening / closing block 904 is fixedly connected to the top of each adapter gear 906. These opening / closing blocks 904 are fan-shaped, and in the initial state, multiple opening / closing blocks 904 are adjacent end-to-end and assembled into a complete circular plane. The diameter of this circular plane matches the inner diameter of the telescopic tube 4.

[0051] The movement of the opening / closing assembly 9 is powered by the second motor 902. The second motor 902 is fixedly mounted on the connecting plate 905 via a bracket, and its output end is fixedly connected to the drive gear 901. The drive gear 901 is also rotatably connected to the outer surface of the connecting plate 905, and maintains a meshing relationship with the ring rack 903. When the central controller 2 sends a start signal to the second motor 902, the output end of the second motor 902 begins to rotate, driving the drive gear 901 to rotate synchronously. The drive gear 901 transmits its rotational motion to the meshing ring rack 903, causing the ring rack 903 to rotate around its own axis on the outer surface of the connecting plate 905. The rotational motion of the ring rack 903 is further transmitted simultaneously to all meshing adapter gears 906 through gear meshing. Because the meshing parameters of the ring rack 903 and each adapter gear 906 are completely identical, all adapter gears 906 achieve strictly synchronous rotation under the drive of the ring rack 903, and the rotational speed and rotation angle of each adapter gear 906 are exactly the same.

[0052] The synchronous rotation of the adapter gear 906 directly drives the synchronous rotation of the opening and closing block 904 fixedly connected to its top. Each opening and closing block 904 rotates in the horizontal plane with the axis of the corresponding adapter gear 906 as its rotation center. During the synchronous rotation of multiple fan-shaped opening and closing blocks 904, their relative positions change continuously. The opening and closing blocks 904, which were originally assembled into a complete circle, rotate and shift uniformly along the circumference, and the gap between adjacent opening and closing blocks 904 gradually increases. This movement mode is exactly the same as the unfolding mode of an explosive circular tabletop. All tabletop units rotate and spread synchronously outward from the center, realizing a rapid transition from a folded state to an unfolded state. The entire unfolding process takes a very short time, and the action of going from folded to fully unfolded can be completed in a very short time, thus meeting the requirements for rapid response in charging pile fires.

[0053] When fully unfolded, the opening and closing blocks 904 form a hollow or circular skeleton structure with radial slits. This structure is located inside the telescopic tube 4 and maintains an appropriate gap with the inner wall of the telescopic tube 4. The plane formed by the unfolded opening and closing blocks 904 is perpendicular to the spray direction of the transmission tube 502. After the extinguishing gas released from the housing 501 moves upward along the transmission tube 502, it passes through the gaps between the opening and closing blocks 904 and is evenly distributed to the fire area inside the charging pile body 1. This distribution method allows the extinguishing gas to cover the fire source in a large-area uniform state, avoiding the problem of incomplete local fire extinguishing that may be caused by concentrated spraying.

[0054] After the firefighting mission is completed, the central controller 2 sends a reverse operation command to the second motor 902. The output of the second motor 902 rotates in reverse, the drive gear 901 drives the ring rack 903 to rotate in reverse, and the ring rack 903 drives all the adapter gears 906 to rotate in reverse synchronously. Each opening and closing block 904 rotates and resets in the opposite direction to its unfolded state, finally returning to its initial folded circular assembly state. After the opening and closing blocks 904 are folded, their overall volume is significantly reduced, no longer hindering the retraction of the telescopic tube 4, and is ready for the next use.

[0055] The cooperation between the opening / closing component 9 and the telescopic tube 4 also plays a crucial role. The outer surface of the connecting plate 905 is fixedly connected to the telescopic tube 4, allowing the opening / closing component 9 to move together with the telescopic tube 4. The telescopic tube 4 can extend or retract as needed. When the telescopic tube 4 extends, the opening / closing component 9 is pushed closer to the ignition point, shortening the transmission distance of the extinguishing gas from the outlet to the fire source, reducing diffusion loss during transmission, and increasing the concentration and pressure of the extinguishing agent upon reaching the fire source. When the telescopic tube 4 retracts, the opening / closing component 9 returns to its initial position inside the charging pile body 1, without occupying additional external space, ensuring the neat appearance of the charging pile and the convenience of daily use.

[0056] Example 3:

[0057] The extension assembly 7 is located at the power supply line. The extension assembly 7 includes a driven gear 701, a support frame 704, and a fixing rod 709. The support frame 704 is fixedly connected inside the charging pile body 1. The driven gear 701 is rotatably connected to the outer surface of the support frame 704. Three annularly distributed fixing rods 709 are fixedly connected to the outer surface of the driven gear 701. A connecting ring 702 is movably sleeved on the outer surface of each of the three fixing rods 709. A third connecting rod 707 is rotatably connected to the outer surface of the support frame 704. A second connecting rod 706 is rotatably connected to the outer surface of the third connecting rod 707. A first connecting rod 705 is rotatably connected to the outer surface of the second connecting rod 706. The first connecting rod 705, the second connecting rod 706, and the third connecting rod 707 are all rotatably connected to the corresponding connecting ring 702.

[0058] A drive gear 708 is rotatably connected to the outer surface of the support frame 704. The drive gear 708 meshes with the driven gear 701. A first motor 710 is fixedly installed on the outer surface of the support frame 704 opposite to the drive gear 708. The output end of the first motor 710 is fixedly connected to the drive gear 708. Fire extinguishing blocks 703 are fixedly connected to the outer surfaces of multiple connecting rings 702.

[0059] The outer surface of multiple fire extinguishing blocks 703 is covered with silicone-coated fiberglass cloth.

[0060] A central controller 2 is fixedly installed on the top of the charging pile body 1. The first motor 710, the second motor 902, the flame sensor 8, and the drive motor are all controlled by the central controller 2.

[0061] The extension assembly 7 is entirely housed inside the charging pile body 1, with its installation position corresponding to the area where the power supply line is located, ensuring that the fire extinguishing block 703 can accurately cover the ignition point of the line after it extends. The support frame 704, as the basic support component of the extension assembly 7, is fixedly connected inside the charging pile body 1, providing a stable support reference for the installation and movement of all other components. Both the driven gear 701 and the drive gear 708 are rotatably connected to the outer surface of the support frame 704, maintaining a meshing relationship. The rotational motion of the drive gear 708 can be directly transmitted to the driven gear 701. The first motor 710 is fixedly installed on the outer surface of the support frame 704 opposite to the drive gear 708. The output end of the first motor 710 passes through the support frame 704 and is fixedly connected to the drive gear 708. The central controller 2 drives the entire extension assembly 7 by controlling the first motor 710.

[0062] Three annularly spaced fixing rods 709 are fixedly connected to the outer surface of the driven gear 701. These three fixing rods 709 extend radially outward from the driven gear 701, with an included angle of 120 degrees between adjacent fixing rods 709, forming a uniform and symmetrical spatial distribution. A connecting ring 702 is movably fitted onto the outer surface of each fixing rod 709. The connecting ring 702 can slide freely along the axial direction on the fixing rod 709, and its sliding range is determined by the length of the fixing rod 709 and the limiting structure. Three connecting rods are rotatably connected to the outer surface of each connecting ring 702: a first connecting rod 705, a second connecting rod 706, and a third connecting rod 707. One end of the third connecting rod 707 is rotatably connected to the outer surface of the support frame 704, and the other end is rotatably connected to the connecting ring 702. The first connecting rod 705 and the second connecting rod 706 are connected in series. One end of the first connecting rod 705 is rotatably connected to the connecting ring 702, and the other end is rotatably connected to the second connecting rod 706. The other end of the second connecting rod 706 is also rotatably connected to the support frame 704. The three connecting rods, the support frame 704, and the connecting ring 702 form a multi-link linkage mechanism, which transforms the sliding motion of the connecting ring 702 along the fixed rod 709 into an orderly extension motion.

[0063] The operation of the extension assembly 7 begins with the activation of the first motor 710. When the central controller 2 determines that there is a fire risk at the power supply line based on the signal from the flame sensor 8, it sends an operation command to the first motor 710. The output of the first motor 710 begins to rotate, driving the drive gear 708 to rotate synchronously. The drive gear 708 transmits rotational motion to the driven gear 701 through its meshing relationship with the driven gear 701, causing the driven gear 701 to rotate around its own axis. The rotation of the driven gear 701 causes the three fixed rods 709 fixedly connected to it to deflect synchronously, and the position of each fixed rod 709 changes continuously in space. The connecting ring 702, which is sleeved on the fixed rod 709, is displaced as the fixed rod 709 deflects, but because the connecting ring 702 is constrained by the three connecting rods at the same time, its movement trajectory is limited to sliding outward along the axial direction of the fixed rod 709. One end of the third connecting rod 707 is fixed to the support frame 704 as a fixed hinge point, and the other end is connected to the connecting ring 702. When the fixed rod 709 deflects, the swing of the third connecting rod 707 forces the connecting ring 702 to move outward along the fixed rod 709. The series linkage formed by the first connecting rod 705 and the second connecting rod 706 further restricts the direction of movement of the connecting ring 702, ensuring that the extension movements of the three connecting rings 702 are consistent.

[0064] As the connecting ring 702 slides outward along the fixing rod 709, the fire extinguishing block 703 fixed to its outer surface extends outward accordingly. The surface of the fire extinguishing block 703 is coated with silicone-coated fiberglass cloth, a material that combines high-temperature resistance and flame retardancy, maintaining structural integrity and effectively isolating air in high-temperature flame environments. The fire extinguishing blocks 703 on the three connecting rings 702 simultaneously approach the ignition point of the power supply line from three different directions, surrounding the ignition point from the outside. The silicone-coated fiberglass cloth tightly covers the surface of the fire source, physically cutting off the contact between the flame and oxygen in the air, causing the flame to extinguish due to lack of oxygen. This multi-point simultaneous enclosure method has a better sealing effect than single-direction coverage, effectively preventing flames from escaping from the edges of the covering.

[0065] Unlike the wide-area coverage of the opening and closing assembly 9, the extension assembly 7 provides a more concentrated and precise coverage. The extension paths and final coverage positions of the three fire extinguishing blocks 703 are pre-designed to ensure they are precisely aligned with the area where the power supply line is located. When the fire is confined to the line joint or the cable itself, the extension assembly 7 can complete the fire extinguishing task by operating alone, without needing to activate the opening and closing assembly 9 or the switching assembly 5, thus saving fire extinguishing gas resources. When the fire has spread to a wider area, the extension assembly 7 and the opening and closing assembly 9 work together. The extension assembly 7 is responsible for precisely suppressing the fire at the ignition point on the line, while the opening and closing assembly 9 is responsible for providing large-area coverage of the entire charging pile's interior space. The two complement each other, achieving all-round fire extinguishing protection from point to area.

[0066] After the fire extinguishing mission is completed, the central controller 2 sends a reverse rotation command to the first motor 710. The output of the first motor 710 rotates in reverse, driving the driven gear 708 to reverse the driven gear 701, and the fixed rod 709 deflects back to its initial position. Guided by the three connecting rods, the connecting ring 702 slides in the reverse direction along the fixed rod 709, gradually returning to its initial position. The fire extinguishing block 703 retracts along with the connecting ring 702, exiting from the power supply line area and returning to the standby position inside the charging pile body 1, no longer causing any interference to the normal operation and daily maintenance of the line. The entire reset process is completely reversible with the unfolding process, and the movement trajectory of each component remains consistent, ensuring the reusability of the device.

[0067] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic cooling and fire extinguishing device for a charging pile, comprising a charging pile body (1), wherein multiple equidistant heat dissipation holes (3) are provided on both outer surfaces of the charging pile body (1), characterized in that, The outer surface of the charging pile body (1) is fixedly installed with a hollow telescopic tube (4), the inside of the charging pile body (1) is provided with an exchange component (5), the outer surface of the exchange component (5) is provided with an opening and closing component (9), the telescopic tube (4) is fixedly connected to the outer surface of the opening and closing component (9), the inside of the charging pile body (1) is provided with an extension component (7), and the inner wall of the charging pile body (1) is fixedly installed with a flame sensor (8). The switching component (5) includes a housing (501), a transmission pipe (502), and a through hole (506). The charging pile body (1) is fixedly connected to the hollow housing (501). The top of the housing (501) has two through holes (506), and the top of each of the two through holes (506) is fixedly connected to a hollow transmission pipe (502).

2. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, The housing (501) is movably connected to a moving rod (503), and a blocking block (507) is fixedly connected to the top of each of the two moving rods (503). The two blocking blocks (507) are in movable contact with the inner wall of the corresponding through hole (506).

3. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, Two rotating disks (505) are rotatably connected between the inner walls of the two sides of the charging pile body (1). A connecting shaft is fixedly connected between the two rotating disks (505). A connecting rod (504) is rotatably connected to the outer surface of each of the two rotating disks (505). The two connecting rods (504) are rotatably connected to the outer surface of the corresponding moving rod (503). The positions of the two connecting rods (504) are staggered. A protective box (6) is fixedly installed on the outer surface of the charging pile body (1). A drive motor is fixedly installed inside the protective box (6). The output end of the drive motor is fixedly connected to the connecting shaft.

4. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, The opening and closing assembly (9) includes an annular rack (903), an opening and closing block (904), a connecting plate (905), and a transition gear (906). The outer surface of the housing (501) is provided with a slot. The connecting plate (905) is fixedly connected to the outer surface of the housing (501). Multiple annular transition gears (906) are rotatably connected to the outer surface of the connecting plate (905). The annular rack (903) is rotatably connected to the outer surface of the connecting plate (905). The multiple transition gears (906) mesh with the annular rack (903). The top of each of the multiple transition gears (906) is fixedly connected to the opening and closing block (904).

5. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, The outer surface of the connecting plate (905) is rotatably connected to the drive gear (901), and the outer surface of the connecting plate (905) is fixedly connected to the bracket. The outer surface of the bracket is fixedly mounted with the second motor (902). The output end of the second motor (902) is fixedly connected to the drive gear (901), and the drive gear (901) meshes with the ring rack (903).

6. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, The multiple opening and closing blocks (904) are arranged in a fan shape, and the multiple opening and closing blocks (904) are combined to form a circle. The outer surface of the connecting plate (905) is fixedly connected to the telescopic tube (4), and the multiple opening and closing blocks (904) are located inside the telescopic tube (4).

7. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, The extension assembly (7) is located at the power supply line. The extension assembly (7) includes a driven gear (701), a support frame (704), and a fixing rod (709). The support frame (704) is fixedly connected inside the charging pile body (1). The driven gear (701) is rotatably connected to the outer surface of the support frame (704). Three annularly distributed fixing rods (709) are fixedly connected to the outer surface of the driven gear (701). A connecting ring (702) is movably sleeved on the outer surface of each of the three fixing rods (709). A third connecting rod (707) is rotatably connected to the outer surface of the support frame (704). A second connecting rod (706) is rotatably connected to the outer surface of the third connecting rod (707). A first connecting rod (705) is rotatably connected to the outer surface of the second connecting rod (706). The first connecting rod (705), the second connecting rod (706), and the third connecting rod (707) are all rotatably connected to the corresponding connecting ring (702).

8. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, A drive gear (708) is rotatably connected to the outer surface of the support frame (704). The drive gear (708) meshes with the driven gear (701). A first motor (710) is fixedly installed on the outer surface of the support frame (704) opposite to the drive gear (708). The output end of the first motor (710) is fixedly connected to the drive gear (708). Fire extinguishing blocks (703) are fixedly connected to the outer surfaces of the multiple connecting rings (702).

9. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, The outer surface of each of the fire extinguishing blocks (703) is covered with silicone-coated fiberglass cloth.

10. The automatic cooling and fire extinguishing device for charging piles according to claim 1, characterized in that, A central controller (2) is fixedly installed on the top of the charging pile body (1). The first motor (710), the second motor (902), the flame sensor (8) and the drive motor are all controlled by the central controller (2).

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