Fire extinguishing device of new energy automobile charging pile

Abstract

The invention relates to a fire extinguishing device of a new energy automobile charging pile. The fire extinguishing device comprises a storage part used for storing a heat absorption medium, a spraying part used for spraying the heat absorption medium and a conveying pipe used for communicating the storage part with the spraying part. The conveying pipe is provided with a control valve for controlling the on-off of the conveying pipe; the outer wall of the conveying pipe is fixedly connected with a reaction tank used for monitoring the temperature, a piston is arranged in the reaction tank in a sliding and sealing fit mode, a heat absorption expansion material is arranged on one side of the piston in the sliding direction, and the piston is in transmission connection with a valve rod in the control valve. The problems that in the prior art, some charging piles are not internally provided with fire extinguishing devices, when the charging piles break down and break out fire, fire extinguishing treatment is difficult to conduct in time, the fire behavior is gradually enlarged, the property loss range is expanded, and threats to personal safety of nearby personnel are increased are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a fire extinguishing device for a new energy vehicle charging pile. Background Art

[0002] A charging pile, also known as a new energy electric vehicle charging station or a new energy electric vehicle power supply equipment, is a device that provides electrical energy to new energy electric vehicles, enabling new energy electric vehicles to store enough electricity to support their operation.

[0003] During the charging process, the electrical equipment inside the charging pile will convert and transmit current, which will generate a certain amount of heat, such as electronic components such as power conversion modules. Especially for DC charging piles, due to their fast charging characteristics, the current is large, so the heat generated will also increase accordingly. If the heat dissipation system of the charging pile is not perfect or it runs at high load for a long time, it may cause heat accumulation, which will cause safety hazards.

[0004] In the prior art, a cooling fan is usually installed inside or outside the charging pile. The rotation of the fan generates airflow to take away the hot air inside the charging pile and discharge it to the external environment, thereby promoting the heat dissipation inside the charging pile and reducing the risk of fire caused by heat accumulation inside the charging pile. However, some charging piles are not equipped with fire extinguishing devices. When a charging pile fails and catches fire, it is difficult to extinguish the fire in time, causing the fire to gradually grow, expanding the scope of property losses and increasing the threat to the personal safety of nearby people. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a fire extinguishing device for a new energy vehicle charging pile, so as to solve the problem that some charging piles in the prior art are not equipped with fire extinguishing devices, and when a charging pile fails and catches fire, it is difficult to extinguish the fire in time, causing the fire to gradually grow, expanding the scope of property loss, and increasing the threat to the personal safety of nearby personnel.

[0006] The present invention is achieved through the following technical solutions:

[0007] A fire extinguishing device for a new energy vehicle charging pile, comprising a storage part for storing a heat absorbing medium, a spraying part for spraying the heat absorbing medium, and a delivery pipe for connecting the storage part and the spraying part;

[0008] The delivery pipe is provided with a control valve for controlling the on and off of the delivery pipe;

[0009] The outer wall of the delivery pipe is fixedly connected with a reaction tank for monitoring temperature, a piston is slidably and sealingly fitted in the reaction tank, and a heat-absorbing expansion material is arranged on one side of the piston along the sliding direction, and the piston is drivingly connected with a valve stem in a control valve.

[0010] Furthermore, the control valve comprises a valve stem and a first sphere, the first sphere is embedded in the delivery pipe, and the outer circumferential surface of the first sphere is in contact with the inner wall of the delivery pipe, and the first sphere is provided with a first through hole penetrating the first sphere;

[0011] One end of the valve stem is fixedly connected to the outer circumferential surface of the first sphere, and the other end penetrates the side wall of the delivery pipe and extends out of the delivery pipe and rotatably cooperates with the side wall of the delivery pipe, and the axis of the valve stem is perpendicular to the axis of the first through hole.

[0012] Furthermore, a gear is coaxially fixedly connected to the middle of the valve stem, the reaction tank is a hollow structure with one end open, and the heat-absorbing expansion material is arranged at the end of the piston facing away from the opening of the reaction tank;

[0013] A rack is provided at one end of the piston facing the opening of the reaction tank, one end of the rack is fixedly connected to the piston, and the other end protrudes out of the opening of the reaction tank and meshes with the gear.

[0014] Furthermore, a first spring is provided at one end of the piston facing the opening of the reaction tank, one end of the first spring is fixedly connected to the piston, and the other end is fixedly connected to the opening end of the reaction tank, and when the first spring is in a naturally extended state, the axis of the first through hole is perpendicular to the axis of the delivery pipe.

[0015] Furthermore, the storage part comprises a storage tank with an opening at one end and a hollow structure, a sealing disk for sealing the opening of the storage tank is arranged in the storage tank, and the sealing disk is slidably and sealingly matched with the inner wall of the storage tank;

[0016] A second spring is provided at one end of the sealing disk facing the storage tank opening, one end of the second spring is fixedly connected to the sealing disk, and the other end is fixedly connected to the storage tank opening end, and the sealing disk abuts against an inner wall of the storage tank facing away from the opening when the second spring is naturally stretched.

[0017] Furthermore, a heat conducting pipe is provided on the storage tank, one end of the heat conducting pipe is fixedly connected and communicated with the bottom of the side wall of the storage tank, and the other end is embedded in the charging pile and contacts with the electronic components in the charging pile.

[0018] Furthermore, the delivery pipe is L-shaped with a horizontal input end and a vertical output end, a vertical branch pipe is provided in the middle of the delivery pipe, and one end of the branch pipe is fixedly connected and communicated with the delivery pipe, and the other end is fixedly connected and communicated with the end of the heat transfer pipe facing away from the storage tank;

[0019] A power pump is arranged outside the storage tank, an input end of the power pump is fixedly connected and communicated with the bottom end of the side wall of the storage tank, and an output end of the power pump is fixedly connected and communicated with the input end of the delivery pipe.

[0020] Furthermore, a second sphere is disposed in the branch pipe, and the outer circumferential surface of the second sphere is in contact with the inner wall of the branch pipe, and a second through hole penetrating the second sphere is opened on the second sphere;

[0021] The end of the valve stem facing away from the first sphere is inserted into the branch pipe and fixedly connected to the outer circumferential surface of the second sphere, and the axis of the valve stem is perpendicular to the axis of the second through hole, and the axis of the second through hole is perpendicular to the axis of the first through hole.

[0022] Furthermore, a heat dissipation block for dissipating heat on the heat conduction pipe is provided on the heat conduction pipe, and the heat dissipation block is sleeved outside the heat conduction pipe and fixedly connected, and the heat dissipation block is arranged outside the charging pile.

[0023] Furthermore, the heat dissipation block is cylindrical, and a plurality of heat dissipation fins are evenly arranged along the circumferential direction on the outer circumferential surface of the heat dissipation block;

[0024] One side of the heat sink is fixedly connected to the outer circumferential surface of the heat sink block, and the other side extends radially along the heat sink block toward a side away from the heat sink block.

[0025] The beneficial effects of the present invention are:

[0026] The fire extinguishing device of the new energy vehicle charging pile is provided with a storage part for storing a heat absorbing medium and a spraying part for spraying the heat absorbing medium, and the storage part and the spraying part are connected by a conveying pipe, so that the heat absorbing medium in the storage part can be sprayed out from the spraying part to absorb the heat of the combustion material in the charging cabinet and reduce the temperature of the combustion material. When the temperature drops below the ignition point of the combustion material, the combustion process is forced to stop, thereby achieving fire extinguishing.

[0027] By setting up a reaction tank and storing heat-absorbing expansion materials in the reaction tank, when the temperature around the reaction tank rises, the reaction tank conducts part of the heat into the interior of the reaction tank, and the heat-absorbing expansion materials continue to absorb heat and expand continuously, so as to continuously push the piston to slide in the reaction tank, and because the piston is connected to the valve stem of the control valve, the valve stem rotates until the control valve is opened, so that the delivery pipe is connected, and the heat-absorbing medium is removed from the storage tank and smoothly passes through the delivery pipe until it is sprayed from the spraying part to the interior of the charging cabinet, so as to achieve the purpose of automatic fire extinguishing. That is, when a fault occurs in the charging cabinet and a fire occurs, the fire extinguishing device automatically sprays the heat-absorbing material, performs fire extinguishing in time, limits the continuous expansion of the fire, reduces the scope of property loss, and reduces the threat to the personal safety of nearby personnel.

[0028] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention (viewing angle 1);

[0030] Figure 2 Schematic diagram of the three-dimensional structure of an embodiment of the present invention (viewing angle 2);

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the fire extinguishing device in an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the delivery pipe, reaction tank and control valve in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of a reaction tank in an embodiment of the present invention;

[0034] Figure 6 An exploded view of a reaction tank in an embodiment of the present invention;

[0035] Figure 7 Schematic diagram of the three-dimensional structure of the valve stem in an embodiment of the present invention;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the heat dissipation block in an embodiment of the present invention;

[0037] Fig. 9 It is an exploded view of a storage tank in an embodiment of the present invention.

[0038] In the figure: 1. delivery pipe; 11. branch pipe; 12. nozzle; 2. reaction tank; 21. piston; 22. first spring; 23. rack; 3. valve stem; 31. first sphere; 311. first through hole; 32. second sphere; 321. second through hole; 33. gear; 4. storage tank; 41. sealing disk; 42. second spring; 43. heat pipe; 5. power pump; 6. heat sink; 61. heat sink; 7. charging pile. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the above description of the present invention, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0044] See also Figure 1-9 , the present invention provides a technical solution: a fire extinguishing device for a new energy vehicle charging pile 7, comprising a storage part for storing a heat absorbing medium, a spraying part for spraying the heat absorbing medium, and a delivery pipe 1 for connecting the storage part and the spraying part;

[0045] The delivery pipe 1 is provided with a control valve for controlling the on and off of the delivery pipe 1;

[0046] The outer wall of the delivery pipe 1 is fixedly connected with a reaction tank 2 for monitoring temperature, and a piston 21 is slidably and sealedly fitted inside the reaction tank 2. Heat-absorbing expansion material is provided on one side of the piston 21 along the sliding direction, and the piston 21 is drivingly connected with the valve stem 3 in the control valve.

[0047] By providing a storage part for storing the heat absorbing medium and a spraying part for spraying the heat absorbing medium, the storage part and the spraying part are connected by using a conveying pipe 1, so that the heat absorbing medium in the storage part can be sprayed out from the spraying part to absorb the heat of the combustion materials in the charging cabinet and reduce the temperature of the combustion materials. When the temperature drops below the ignition point of the combustion materials, the combustion process is forced to stop, thereby achieving fire extinguishing.

[0048] By setting up a reaction tank 2 and storing heat-absorbing expansion material in the reaction tank 2, when the temperature around the reaction tank 2 rises, the reaction tank 2 conducts part of the heat into the inside of the reaction tank 2, and the heat-absorbing expansion material continuously absorbs heat and continues to expand, so as to continuously push the piston 21 to slide in the reaction tank 2, and because the piston 21 is connected to the valve stem 3 of the control valve, the valve stem 3 rotates until the control valve is opened, so that the delivery pipe 1 is connected, and the heat-absorbing medium is removed from the storage tank 4 and smoothly passes through the delivery pipe 1 until it is sprayed from the spraying part to the inside of the charging cabinet, so as to achieve the purpose of automatic fire extinguishing. That is, when a fault occurs in the charging cabinet and a fire occurs, the fire extinguishing device automatically sprays the heat-absorbing material, performs fire extinguishing in time, limits the continuous expansion of the fire, reduces the scope of property loss, and reduces the threat to the personal safety of nearby personnel.

[0049] In this embodiment: the control valve comprises a valve stem 3 and a first sphere 31, the first sphere 31 is embedded in the delivery pipe 1, and the outer circumferential surface of the first sphere 31 is in contact with the inner wall of the delivery pipe 1, and the first sphere 31 is provided with a first through hole 311 penetrating the first sphere 31;

[0050] One end of the valve stem 3 is fixedly connected to the outer circumferential surface of the first sphere 31 , and the other end penetrates the side wall of the delivery pipe 1 and extends out of the delivery pipe 1 and rotates with the side wall of the delivery pipe 1 , and the axis of the valve stem 3 is perpendicular to the axis of the first through hole 311 .

[0051] The first sphere 31 is embedded in the delivery pipe 1 to block the delivery pipe 1, so that the first through hole 311 serves as a flow channel for the heat absorbing medium. During the rotation of the valve stem 3, the first sphere 31 rotates with the valve stem 3. When the axis of the first through hole 311 is perpendicular to the axis of the delivery pipe 1, the openings at both ends of the first through hole 311 are covered and blocked by the inner wall of the delivery pipe 1, so that the first sphere 31 blocks the delivery pipe 1, so that the heat absorbing medium is stably stored in the storage part; when the axis of the first through hole 311 is parallel to the axis of the delivery pipe 1, the openings at both ends of the first through hole 311 are exposed and open, so that the interior of the delivery pipe 1 is unobstructed, so that the heat absorbing medium can smoothly pass through the delivery pipe 1 and be sprayed out from the spraying part to extinguish the fire.

[0052] In this embodiment: the middle part of the valve stem 3 is coaxially fixedly connected with a gear 33, the reaction tank 2 is a hollow structure with one end open, and the heat-absorbing expansion material is arranged at the end of the piston 21 facing away from the opening of the reaction tank 2;

[0053] A rack 23 is disposed at one end of the piston 21 facing the opening of the reaction tank 2 . One end of the rack 23 is fixedly connected to the piston 21 , and the other end protrudes out of the opening of the reaction tank 2 and meshes with the gear 33 .

[0054] The transmission structure composed of the gear 33 and the rack 23 links the sliding of the piston 21 in the reaction tank 2 with the rotation of the valve stem 3. The sliding of the piston 21 in the reaction tank 2 drives the valve stem 3 to rotate, thereby causing the first ball 31 to rotate, thereby controlling the on and off of the delivery pipe 1, so as to achieve the purpose of automatically controlling the device to extinguish the fire.

[0055] In this embodiment: the first spring 22 is provided at the open end of the piston 21 facing the reaction tank 2, one end of the first spring 22 is fixedly connected to the piston 21, and the other end is fixedly connected to the open end of the reaction tank 2, and when the first spring 22 is in a naturally extended state, the axis of the first through hole 311 is perpendicular to the axis of the delivery pipe 1.

[0056] The first spring 22 is used to provide flexible support for the piston 21. In a normal temperature environment, the volume of the heat-absorbing expansion material shrinks, and the first spring 22 freely extends to push the piston 21 to move toward the closed end of the reaction tank 2, so that the rack 23 drives the valve stem 3 and the first ball 31 to rotate through the gear 33 until the openings at both ends of the first through hole 311 are covered and blocked by the side wall of the delivery pipe 1, and the first spring 22 restricts the piston 21 from sliding freely toward the open end of the reaction tank 2, so that the first ball 31 remains in a state of blocking the delivery pipe 1, reducing the probability of leakage of the heat-absorbing medium in the storage part.

[0057] In this embodiment: the storage part includes a storage tank 4 with an opening at one end and a hollow structure, a sealing disk 41 for sealing the opening of the storage tank 4 is arranged in the storage tank 4, and the sealing disk 41 is slidably and sealingly matched with the inner wall of the storage tank 4;

[0058] The sealing disk 41 is provided with a second spring 42 at one end facing the opening of the storage tank 4. One end of the second spring 42 is fixedly connected to the sealing disk 41, and the other end is fixedly connected to the opening end of the storage tank 4. When the second spring 42 is naturally stretched, the sealing disk 41 abuts against an inner wall of the storage tank 4 facing away from the opening.

[0059] The second spring 42 plays a flexible supporting role for the sealing disk 41. When the storage tank 4 contains the heat absorbing medium, the sealing disk 41 is pushed to move toward the open end of the storage tank 4, and the second spring 42 is squeezed and contracted, so that the sealing disk 41 squeezes the heat absorbing medium, and the pressure of the heat absorbing medium in the storage tank 4 is higher than the atmospheric pressure; when the delivery pipe 1 is unblocked, the second spring 42 releases energy, squeezes the heat absorbing medium through the sealing disk 41, and the heat absorbing medium is sprayed out from the spraying part to perform fire extinguishing work.

[0060] In this embodiment: a heat pipe 43 is provided on the storage tank 4 , one end of the heat pipe 43 is fixedly connected and communicated with the bottom of the side wall of the storage tank 4 , and the other end is embedded in the charging pile 7 and contacts with the electronic components in the charging pile 7 .

[0061] The heat pipe 43 is made of copper, and a copper sheet is welded at the contact position between the heat pipe 43 and the electronic components. The heat pipe 43 contacts the electronic components through the copper sheet to conduct the heat generated by the electronic components to the heat pipe 43, and then transport the heat to the storage tank 4 outside the charging pile 7 through the heat pipe 43 to assist the electronic components in dissipating heat and reduce the risk of fire caused by temperature accumulation in the charging pile 7.

[0062] In this embodiment: the delivery pipe 1 is in an L-shape with a horizontal input end and a vertical output end. A vertical branch pipe 11 is provided in the middle of the delivery pipe 1, and one end of the branch pipe 11 is fixedly connected and communicated with the delivery pipe 1, and the other end is fixedly connected and communicated with the end of the heat conduction pipe 43 facing away from the storage tank 4;

[0063] A power pump 5 is disposed outside the storage tank 4 , and an input end of the power pump 5 is fixedly connected and communicated with the bottom end of the side wall of the storage tank 4 , and an output end of the power pump 5 is fixedly connected and communicated with the input end of the delivery pipe 1 .

[0064] A closed-loop transmission network is formed by the transmission pipe 1, the branch pipe 11, the heat-conducting pipe 43, the storage tank 4 and the power pump 5. The power pump 5 provides power to the heat-absorbing medium, so that the heat-absorbing medium circulates unidirectionally in the transmission network. When the heat-absorbing medium moves to the vicinity of the electronic components, the heat-absorbing medium absorbs the heat generated by the electronic components and moves to the outside of the charging cabinet. After the heat-absorbing medium dissipates the heat outside the charging pile 7, it enters the charging pile 7 again under the action of the power pump 5, so as to continuously transport the heat generated by the electronic components to the outside of the charging pile 7, thereby reducing the probability of fire caused by a failure of the charging pile 7.

[0065] In this embodiment: a second sphere 32 is disposed in the branch pipe 11, and the outer circumferential surface of the second sphere 32 is in contact with the inner wall of the branch pipe 11, and a second through hole 321 penetrating through the second sphere 32 is opened on the second sphere 32;

[0066] The end of the valve stem 3 facing away from the first sphere 31 is inserted into the branch pipe 11 and fixedly connected to the outer circumferential surface of the second sphere 32 , and the axis of the valve stem 3 is perpendicular to the axis of the second through hole 321 , and the axis of the second through hole 321 is perpendicular to the axis of the first through hole 311 .

[0067] The delivery pipe 1 and the branch pipe 11 form a three-way structure, wherein the input end of the delivery pipe 1 is the input end of the three-way structure, and the output end of the delivery pipe 1 and the output end of the branch pipe 11 are the two output ends of the three-way structure. The second sphere 32 is used to block and block the branch pipe 11. Since the first sphere 31 and the second sphere 32 are respectively fixedly connected to the two ends of the valve stem 3, and the axis of the first through hole 311 in the first sphere 31 is perpendicular to the axis of the second through hole 321 in the second sphere 32, when the openings at both ends of the first through hole 311 are exposed and open, the openings at both ends of the second through hole 321 are blocked by the side cover of the inner wall of the branch pipe 11; when the openings at both ends of the first through hole 311 are covered and blocked by the side wall of the delivery pipe 1, the openings at both ends of the second through hole 321 are exposed and open.

[0068] That is, only one output end of the three-way structure can be connected to the input end at the same time. When the ambient temperature in the charging pile 7 is low or at room temperature, the first spring 22 freely extends to cause the first sphere 31 to block the output end of the delivery pipe 1, so that the heat-absorbing medium circulates in the closed-loop transmission network composed of the delivery pipe 1, the branch pipe 11, the heat-conducting pipe 43, the storage tank 4 and the power pump 5 to assist the electronic components in dissipating heat.

[0069] When the ambient temperature in the charging pile 7 is too high or a fire occurs, the heat-absorbing expansion material absorbs heat and expands, pushing the piston 21 to squeeze the first spring 22, so that the second sphere 32 blocks the output end of the branch pipe 11, and the output end of the delivery pipe 1 is opened and unblocked, so that the heat-absorbing medium is sprayed out from the spraying part to cool down and extinguish the fire inside the charging pile 7. The storage tank 4 is a hollow structure with one end open, and the sealing disk 41 slides in the storage tank 4 to balance the pressure on both sides of the sealed tank, so that the heat-absorbing medium is continuously moved out from the spraying part.

[0070] In this embodiment: a heat dissipation block 6 for dissipating heat on the heat conduction pipe 43 is provided on the heat conduction pipe 43 , and the heat dissipation block 6 is sleeved outside the heat conduction pipe 43 and fixedly connected, and the heat dissipation block 6 is provided outside the charging pile 7 .

[0071] The heat sink 6 is made of copper, which has high thermal conductivity and can quickly transfer heat. The heat sink 6 is arranged outside the heat pipe 43 to increase the contact area with the air, promote heat dissipation, and promote the cooling of the heat absorbing medium, so that the heat absorbing medium can continue to transfer heat.

[0072] In this embodiment: the heat dissipation block 6 is cylindrical, and a plurality of heat dissipation fins 61 are evenly arranged along the circumferential direction on the outer surface of the heat dissipation block 6;

[0073] One side of the heat sink 61 is fixedly connected to the outer circumferential surface of the heat sink block 6 , and the other side extends along the radial direction of the heat sink block 6 toward a side away from the heat sink block 6 .

[0074] By arranging a plurality of heat sinks 61 on the outer circumferential surface of the heat sink block 6, the surface area of ​​the heat sink block 6 is increased, thereby further promoting heat dissipation.

[0075] Among them, the spraying part is a nozzle 12, and the input end of the nozzle 12 is fixedly connected and connected to the output end of the delivery pipe 1. The specific model of the nozzle 12 is Shanghai Mintai ZSTWC; the heat absorbing medium is ultrapure water, which has a high specific heat capacity and good fluidity, and can better realize the function of heat conduction and heat transfer, and the conductivity of ultrapure water is very low. This is because in ultrapure water, various ions, microorganisms, organic matter and almost all other impurities are removed, resulting in extremely low ion concentration in the water, so the conductivity is extremely poor, making ultrapure water difficult to conduct electricity during the cooling and fire extinguishing process, reducing the probability of further damage to the internal electronic components of the charging pile 7. The heat absorbing expansion material is alcohol, which is liquid at room temperature. After the alcohol is heated, it will be converted into a gaseous state, which increases the pressure in the reaction tank 2, and then pushes the piston 21 to slide. When the temperature around the reaction tank 2 decreases, the alcohol will condense into a liquid state, reduce the pressure in the reaction tank 2, and prompt the piston 21 to return to the initial position, so that the reaction tank 2 can be used repeatedly.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A fire extinguishing device for a new energy vehicle charging pile, characterized in that: It comprises a storage part for storing a heat absorbing medium, a spraying part for spraying the heat absorbing medium, and a delivery pipe (1) for connecting the storage part and the spraying part; The delivery pipe (1) is provided with a control valve for controlling the on and off of the delivery pipe (1); A reaction tank (2) for monitoring temperature is fixedly connected to the outer wall of the delivery pipe (1), a piston (21) is slidably and sealingly fitted inside the reaction tank (2), and a heat-absorbing expansion material is provided on one side of the piston (21) along the sliding direction, and the piston (21) is drivingly connected to a valve stem (3) in a control valve.

2. The fire extinguishing device for the new energy vehicle charging pile according to claim 1 is characterized in that: The control valve comprises a valve stem (3) and a first sphere (31); the first sphere (31) is embedded in the delivery pipe (1), and the outer circumferential surface of the first sphere (31) is in contact with the inner wall of the delivery pipe (1); and the first sphere (31) is provided with a first through hole (311) penetrating the first sphere (31); One end of the valve stem (3) is fixedly connected to the outer circumferential surface of the first sphere (31), and the other end penetrates the side wall of the delivery pipe (1) to extend outside the delivery pipe (1) and rotatably cooperates with the side wall of the delivery pipe (1), and the axis of the valve stem (3) is perpendicular to the axis of the first through hole (311).

3. The fire extinguishing device for the new energy vehicle charging pile according to claim 2 is characterized in that: A gear (33) is coaxially fixedly connected to the middle of the valve stem (3); the reaction tank (2) is a hollow structure with one end open, and the heat-absorbing expansion material is arranged at the end of the piston (21) facing away from the opening of the reaction tank (2); A rack (23) is provided at one end of the piston (21) facing the opening of the reaction tank (2); one end of the rack (23) is fixedly connected to the piston (21), and the other end protrudes out of the opening of the reaction tank (2) and meshes with the gear (33).

4. The fire extinguishing device for the new energy vehicle charging pile according to claim 3 is characterized in that: A first spring (22) is provided at the open end of the piston (21) facing the reaction tank (2); one end of the first spring (22) is fixedly connected to the piston (21), and the other end is fixedly connected to the open end of the reaction tank (2); and when the first spring (22) is in a naturally extended state, the axis of the first through hole (311) is perpendicular to the axis of the delivery pipe (1).

5. The fire extinguishing device for the new energy vehicle charging pile according to claim 2 is characterized in that: The storage portion comprises a storage tank (4) with an opening at one end and a hollow structure, wherein a sealing disk (41) is arranged inside the storage tank (4) for sealing the opening of the storage tank (4), and the sealing disk (41) is slidably and sealingly matched with the inner wall of the storage tank (4); A second spring (42) is provided at one end of the sealing disk (41) facing the opening of the storage tank (4); one end of the second spring (42) is fixedly connected to the sealing disk (41), and the other end is fixedly connected to the opening end of the storage tank (4); and when the second spring (42) is in a naturally extended state, the sealing disk (41) abuts against an inner wall of the storage tank (4) facing away from the opening.

6. The fire extinguishing device for the new energy vehicle charging pile according to claim 5 is characterized in that: The storage tank (4) is provided with a heat conducting pipe (43), one end of the heat conducting pipe (43) is fixedly connected to and communicates with the bottom of the side wall of the storage tank (4), and the other end is embedded in the charging pile (7) and contacts with electronic components in the charging pile (7).

7. The fire extinguishing device for the new energy vehicle charging pile according to claim 6 is characterized in that: The delivery pipe (1) is in an L-shape with a horizontal input end and a vertical output end. A vertical branch pipe (11) is provided in the middle of the delivery pipe (1), and one end of the branch pipe (11) is fixedly connected to and communicated with the delivery pipe (1), and the other end is fixedly connected to and communicated with an end of the heat conduction pipe (43) facing away from the storage tank (4); A power pump (5) is arranged outside the storage tank (4); the input end of the power pump (5) is fixedly connected and communicated with the bottom end of the side wall of the storage tank (4), and the output end is fixedly connected and communicated with the input end of the delivery pipe (1).

8. The fire extinguishing device for the new energy vehicle charging pile according to claim 7 is characterized in that: A second sphere (32) is arranged in the branch pipe (11), and the outer circumferential surface of the second sphere (32) is in contact with the inner wall of the branch pipe (11), and a second through hole (321) penetrating the second sphere (32) is provided on the second sphere (32); The end of the valve stem (3) facing away from the first sphere (31) is inserted into the branch pipe (11) and is fixedly connected to the outer cylindrical surface of the second sphere (32), and the axis of the valve stem (3) is perpendicular to the axis of the second through hole (321), and the axis of the second through hole (321) is perpendicular to the axis of the first through hole (311).

9. The fire extinguishing device for the new energy vehicle charging pile according to claim 6, characterized in that: The heat conducting pipe (43) is provided with a heat dissipation block (6) for dissipating heat on the heat conducting pipe (43), and the heat dissipation block (6) is sleeved outside the heat conducting pipe (43) and fixedly connected, and the heat dissipation block (6) is arranged outside the charging pile (7).

10. The fire extinguishing device for the new energy vehicle charging pile according to claim 9, characterized in that: The heat dissipation block (6) is cylindrical, and a plurality of heat dissipation fins (61) are evenly arranged along the circumferential direction on the outer circumferential surface of the heat dissipation block (6); One side of the heat sink (61) is fixedly connected to the outer circumferential surface of the heat sink block (6), and the other side extends radially along the heat sink block (6) toward a side away from the heat sink block (6).

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