Fire extinguishing device and fire extinguishing method for electric vehicle shed

Abstract

The invention discloses an electric vehicle shed fire extinguishing device and a fire extinguishing method, and belongs to the technical field of fire extinguishing equipment.The electric vehicle shed fire extinguishing device comprises a fire extinguishing agent configuration mechanism, a fire extinguishing adjusting mechanism, a metal high-pressure hose and a fire detection system; the metal high-pressure hose is connected with the fire extinguishing agent configuration mechanism and the fire extinguishing adjusting mechanism; the fire detection system is used for detecting coordinates of an ignition point and controlling the fire extinguishing adjusting mechanism to align to the ignition point; the fire extinguishing adjusting mechanism comprises a base placed on the ground of an electric vehicle shed; a cavity is formed in the shell; the stand column is rotationally connected to the base and can rotate horizontally; a rotating motor used for enabling the stand column to rotate is arranged in the cavity. The telescopic cross arm is mounted at the upper end of the stand column; the atomizing nozzle is mounted on the telescopic cross arm, can move along the horizontal direction under the action of the telescopic cross arm, and can horizontally rotate along with the upright post together with the telescopic cross arm as a whole; and one end of the metal high-pressure hose is connected with the atomizing nozzle. The fire extinguishing device and method can accurately spray the fire extinguishing agent to the ignition point, and the fire extinguishing capacity is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fire extinguishing equipment, and in particular relates to a fire extinguishing device and a fire extinguishing method for an electric vehicle shed. Background Art

[0002] As one of the daily means of transportation, electric vehicles have a large number of owners and a wide range of uses. When electric vehicles are parked in a carport, due to reasons such as aging of the electric vehicle lines and thermal runaway of the battery, the electric vehicle will catch fire in a short period of time, and the fire will be large and spread quickly. The fire of the burning electric vehicle will quickly spread to other electric vehicles, further expanding the burning area and causing a fire that is difficult to control.

[0003] At present, the method of controlling fire in electric vehicle carports mainly relies on sprinkler heads at fixed positions. When a fire occurs, water or fire extinguishing agent is sprayed out from the sprinkler heads at a certain position. The water or fire extinguishing agent forms a covering area during the falling process, and the covering area covers the fire point, thereby achieving the purpose of extinguishing the fire at the fire point.

[0004] The drawbacks of the above-mentioned fire extinguishing method are: Fixed sprinkler heads cannot accurately target the fire point; that is, as long as the spraying range of a sprinkler head can cover the fire point, it is considered to be able to extinguish the fire at the fire point. Without targeted spraying at the fire point, the fire extinguishing effect at the fire point is not strong. Summary of the invention

[0005] The electric vehicle carport fire extinguishing device and fire extinguishing method of the present invention can spray targetedly on the fire point to improve the fire extinguishing effect on the fire point.

[0006] The electric vehicle carport fire extinguishing device of the present invention comprises a fire extinguishing agent configuration mechanism, a fire extinguishing adjustment mechanism, a metal high-pressure hose and a fire detection system; The metal high-pressure hose connects the fire extinguishing agent configuration mechanism and the fire extinguishing adjustment mechanism, and the fire extinguishing agent configuration mechanism can pump the fire extinguishing agent to the fire extinguishing adjustment mechanism through the metal high-pressure hose; The fire detection system is used to detect the coordinates of the fire point, control the fire extinguishing regulating mechanism to aim at the fire point, and pump the fire extinguishing agent to the fire extinguishing regulating mechanism to extinguish the fire at the fire point; Fire extinguishing regulation mechanism includes: The base is placed on the ground of the electric vehicle shed and has a cavity inside; The column is rotatably connected to the base and can rotate horizontally; a rotating motor for rotating the column is arranged in the cavity; A retractable cross arm is mounted on the upper end of the column; The atomizing nozzle is installed on the telescopic cross arm, can move in the horizontal direction under the action of the telescopic cross arm, and can rotate horizontally with the column as a whole with the telescopic cross arm; one end of the metal high-pressure hose is connected to the atomizing nozzle.

[0007] Furthermore, the fire extinguishing agent configuration mechanism includes: Movable frame, capable of moving positions; A liquid storage tank is installed on a movable frame; a stirrer for stirring the fire extinguishing agent in the liquid storage tank is installed on the top of the liquid storage tank; The plunger pump is installed on a movable frame; the liquid inlet end of the plunger pump is connected to the liquid storage tank through a water inlet pipe, a flow meter is installed on the liquid outlet end of the plunger pump, and the liquid outlet end of the plunger pump is connected to the other end of a metal high-pressure hose.

[0008] Furthermore, the fire detection system comprises: The infrared thermal imaging camera is installed on the top of the electric vehicle shed and can take infrared images of a certain area of ​​the electric vehicle shed from a bird's-eye view; The automatic fire controller can receive infrared images taken by infrared thermal imaging cameras and determine the coordinates of the fire point based on the infrared images. The automatic fire controller is electrically connected to the plunger pump, rotating motor, flow meter and retractable cross arm, and can control the movement of the plunger pump, rotating motor and retractable cross arm to aim the atomizing nozzle at the fire point to spray the fire extinguishing agent.

[0009] Furthermore, the electric vehicle carport has a plurality of fire extinguishing devices, all of which are electrically connected to a master controller, and all of which can send the coordinates of the fire point to the master controller, which selects a fire extinguishing device to extinguish the fire.

[0010] When the fire point area is repeated, one of the fire extinguishing devices can be selected to extinguish the fire by judgment. It can not only start the fire extinguishing device logically, but also avoid interference and energy waste caused by the simultaneous operation of multiple fire extinguishing devices.

[0011] Furthermore, a threaded joint is provided at the liquid outlet of the plunger pump, a threaded joint is also provided on the atomizing nozzle, and both ends of the metal high-pressure hose are connected by threaded joints respectively; the diameter of the metal high-pressure hose has various specifications.

[0012] According to different application scenarios, metal high-pressure hoses of different diameters can be replaced to meet different needs. Large-diameter metal high-pressure hoses can be used for larger spaces, and small-diameter metal high-pressure hoses can be used for smaller spaces, which are flexible to use. Threaded joints are easy to disassemble and assemble.

[0013] Furthermore, a retractable column is used to replace the column, the retractable column is a linear slide rail, and the retractable cross arm is installed on the slider of the linear slide rail through a bracket.

[0014] The retractable columns replace the original columns, and the relevant personnel can manually adjust the height of the retractable cross arm and the atomizing nozzle to adapt to electric vehicle sheds of different heights. When the atomizing nozzle rotates as a whole with the retractable cross arm, it can avoid low-height obstacles.

[0015] Furthermore, a method for extinguishing a fire in an electric vehicle shed comprises the following steps: S1: the infrared thermal imaging cameras in all the fire extinguishing devices respectively take infrared images of a certain area of ​​the electric vehicle shed corresponding to the infrared thermal imaging cameras in the fire extinguishing devices; the infrared images taken by the infrared thermal imaging cameras in the various fire extinguishing devices have overlapping areas, and the areas taken by all the infrared images can cover the entire electric vehicle shed area; the infrared images taken by the corresponding infrared thermal imaging cameras are uploaded to the controller in the corresponding fire extinguishing device; S2: A controller in the corresponding fire extinguishing device divides the corresponding infrared image into a number of rectangular grids using a grid division method; S3: The controller in the corresponding fire extinguishing device determines the highest temperature of all rectangular grids in the corresponding infrared image; S4: For a controller in a fire extinguishing device, if the highest temperature of Z consecutive rectangular grids in the corresponding infrared image exceeds T degrees Celsius, it is considered that a fire has occurred in the actual area represented by the Z rectangular grids; the controller obtains the actual ignition point coordinate set X ; Any rectangular grid with a temperature exceeding T represents an ignition coordinate, and the ignition coordinates of all consecutive rectangular grids with a temperature exceeding T are stored in a collection X middle; The conditions that must be met for Z rectangular grids to be continuous rectangular grids are: (1) The figure composed of Z rectangular grids is uninterrupted; (2) Any rectangular grid among the Z rectangular grids is not connected to any of the four corner points of any rectangular grid among the other Z-1 rectangular grids; S5: Similarly, the controllers in other fire extinguishing devices determine the corresponding fire point coordinate sets; all controllers that determine the fire point coordinates send the corresponding fire point coordinate sets to the master controller; controllers that do not determine the fire do not send signals to the master controller; S6: The main controller receives the ignition coordinate set and makes a judgment; If there are no repeated ignition point coordinates in all ignition point coordinate sets, the master controller sends a fire extinguishing signal to all controllers that send ignition point coordinate sets; If some of the ignition point coordinates in two or more ignition point coordinate sets are repeated, the master controller still sends a fire extinguishing signal to all controllers that sent the ignition point coordinate sets; If there are two or more sets of ignition point coordinates that are exactly the same, the master controller sends a fire extinguishing signal to one of the controllers that sent the ignition point coordinate sets; S7: After the corresponding fire extinguishing device controller receives the fire extinguishing signal, the fire extinguishing device obtains the corresponding actual ignition point plane coordinate set according to S4 X , combined with the known initial position of the atomizing nozzle of the fire extinguishing device Y , by the reverse solution method, the telescopic length U of the telescopic cross arm and the forward and reverse rotation angle θ of the rotating motor are solved, and the telescopic cross arm and the rotating motor are controlled accordingly according to U and θ, so that the atomizing nozzle is aimed at the ignition point; S8: After the controller of the corresponding fire extinguishing device controls the atomizing nozzle to aim at the fire point, the controller of the fire extinguishing device controls the plunger pump to extract the fire extinguishing agent, and the fire extinguishing agent is sprayed out from the atomizing nozzle to extinguish the fire point; the flow meter records the flow of the fire extinguishing agent and feeds back to the controller of the fire extinguishing device. When the flow reaches the threshold set in the controller of the fire extinguishing device, the fire extinguishing device stops. The fire extinguishing device aims at the plane coordinate set of the fire point. X A fire coordinate is used to extinguish the fire, and the plane coordinate set is calculated. X Other ignition coordinates and the current position of the atomizer nozzle continue to drive the atomizer nozzle to move to the plane coordinate set X At other ignition coordinate positions, for the plane coordinate set X The other burning coordinates are extinguished once until the plane coordinates are collected. X All the ignition point coordinates are extinguished once; repeat S1-S8, if the ignition point is not extinguished, the corresponding fire extinguishing device will repeat the extinguishing several times until the ignition point is completely extinguished.

[0016] Furthermore, in step S4, Z=6, T=400; each rectangular grid represents a projection area of ​​2cm*2cm in actual situation. Beneficial Effects

[0017] The fire extinguishing device and method can realize the purpose of accurately spraying the fire extinguishing agent and improve the fire extinguishing effect on the fire point by identifying the coordinates of the fire point and using the fire extinguishing adjustment mechanism to aim the atomizing nozzle at the fire point. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the first embodiment; Figure 2 It is a schematic diagram of the structure after the linear guide rail replaces the column in the third embodiment.

[0019] 1. Movable frame; 2. Liquid storage tank; 3. Plunger pump; 4. Flow meter; 5. Metal high-pressure hose; 6. Base; 7. Column; 8. Retractable cross arm; 9. Atomizing nozzle; 10. Agitator; 11. Water inlet pipe; 12. Linear slide rail; 13. Sliding block; 14. Bracket; DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0021] Example 1: See Figure 1 , an electric vehicle carport fire extinguishing device, including a fire extinguishing agent configuration mechanism, a fire extinguishing adjustment mechanism, a metal high-pressure hose 5 connecting the fire extinguishing agent configuration mechanism and the fire extinguishing adjustment mechanism, and a fire detection system.

[0022] Among them, the fire extinguishing agent configuration mechanism includes: The movable frame 1 has a plurality of universal wheels (not shown) installed at its bottom, and the universal wheels have a self-locking structure. With the help of the universal wheels, a person can push the movable frame 1 to move the movable frame 1 at will. After the movable frame 1 moves to a certain position, a person can lock the universal wheels with the self-locking structure, so that the movable frame 1 can stay at a certain position and not move at will.

[0023] The liquid storage tank 2 is fixedly mounted on the movable frame 1, and can move as a whole with the movable frame 1 by means of universal wheels. The whole can be moved to the liquid distribution area. After the person fills the liquid storage tank 2 with fire extinguishing agent in the liquid distribution area, it is moved to the electric vehicle shed. The interior of the liquid storage tank 2 is used to be filled with fire extinguishing agent, and a liquid injection port is provided on the top of the liquid storage tank 2. An agitator 10 is installed on the top of the outside of the liquid storage tank 2, and the agitator 10 belongs to the prior art. The motor part of the agitator 10 is fixedly mounted on the outside of the liquid storage tank 2, and the agitator shaft part of the agitator 10 extends into the liquid storage tank 2. Relevant personnel are required to manually open the agitator regularly to stir the fire extinguishing agent to prevent the fire extinguishing agent in the liquid storage tank 2 from solidifying. The outer shell of the liquid storage tank 2 is transparent, which can facilitate relevant personnel to check the remaining amount of fire extinguishing agent in the liquid storage tank 2 and add fire extinguishing agent to the liquid storage tank 2 in time.

[0024] The plunger pump 3 is fixedly mounted on the movable frame 1 and can move as a whole with the movable frame 1 and the liquid storage tank 2 by means of universal wheels. The liquid inlet end of the plunger pump 3 is connected to the liquid storage tank 2 through the water inlet pipe 11, and the water inlet pipe 11 is connected to the inside of the liquid storage tank 2. A flow meter 4 is installed on the liquid outlet end of the plunger pump 3 to monitor the output of the fire extinguishing agent.

[0025] The liquid outlet of the plunger pump 3 is provided with a joint connected to the metal high-pressure hose 5, and one end of the metal high-pressure hose 5 can be connected and communicated with the liquid outlet of the plunger pump 3 through the joint. In this embodiment, the joint is a threaded joint, and the metal high-pressure hose 5 is a metal gooseneck tube, which is threadedly connected to the threaded joint. The metal high-pressure hose 5 is relatively long and can meet the length requirements of connecting the fire extinguishing agent configuration mechanism and the fire extinguishing adjustment mechanism. In addition, the diameter of the metal high-pressure hose 5 has a variety of specifications. According to the actual usage scenario, metal high-pressure hoses 5 of different diameters are configured. The metal high-pressure hoses 5 of different diameters have the same connector specifications and can be connected to the corresponding connector of the plunger pump 3.

[0026] Fire extinguishing regulation mechanism includes: The base 6 is placed on the ground of the electric vehicle shed to serve as a counterweight.

[0027] The column 7, the axis of the column 7 is arranged vertically, is rotatably connected to the upper surface of the base 6, and can rotate around its axis relative to the base 6. In this embodiment, the length*width*height of the column 7 is 6*6*200cm.

[0028] The non-rotating shaft end of the rotating motor (not shown) is fixedly installed in the base 6. The base 6 has a cavity for placing the rotating motor. The rotating shaft of the rotating motor is connected to the column 7 through a reducer, and the rotating motor drives the column 7 to rotate through the reducer.

[0029] The telescopic cross arm 8 has a non-telescopic end mounted on the upper end of the column 7 and can rotate with the column 7. In this embodiment, the telescopic cross arm 8 includes but is not limited to the use of an electric push rod of the LAP28 series, the axis of which is arranged in the horizontal direction, and the stroke is 0-800mm. After the LAP28 series electric push rod is installed, its non-telescopic end has a certain length in the horizontal direction. When the telescopic end of the electric push rod is extended, the maximum horizontal length of the telescopic cross arm 8 reaches 2m. After the telescopic cross arm 8 and the column 7 are rotated as a whole, the projection of the telescopic cross arm 8 on the horizontal plane after the rotation is circular in a top view, and the radius of the circular projection area is about 2m. In other embodiments, the telescopic cross arm 8 can also be a linear slide rail, the non-slider portion of the linear slide rail is mounted on the top of the column 7, and the slider portion can move in the horizontal direction.

[0030] In this embodiment, the atomizing nozzle 9 is installed on the telescopic end of the telescopic cross arm 8, the outlet of the atomizing nozzle 9 faces downward, and the inlet of the atomizing nozzle 9 is connected to the aforementioned metal high-pressure hose 5 through a threaded joint. The plunger pump 3 can pump the fire extinguishing agent into the metal high-pressure hose 5, and finally spray it out from the atomizing nozzle 9 at the end of the metal high-pressure hose 5. In other embodiments, the atomizing nozzle 9 is correspondingly installed on the slider of the linear slide rail.

[0031] In order to prevent a blind spot between the fire extinguishing agent sprayed by the atomizing nozzle 9 and the column 7, when designing, in a top view, the moving track of the atomizing nozzle 9 is set to be L, and the end of L facing the column 7 is as close to the column 7 as possible.

[0032] The fire detection system also includes an infrared thermal imaging camera installed on the top of the electric vehicle shed, which can take an infrared image of a certain area of ​​the electric vehicle shed from a bird's-eye view. From a bird's-eye view, the coverage area of ​​the movement track of the aforementioned atomizing nozzle 9 can cover the area captured by the infrared image, ensuring that the atomizing nozzle 9 can spray the fire extinguishing agent at any position in the infrared image.

[0033] The fire detection system also includes a fire automatic controller, hereinafter referred to as the controller. The infrared thermal imaging camera is electrically connected to the controller. The infrared thermal imaging camera can send the captured infrared image to the controller, and the controller determines the fire coordinates based on the infrared image. The controller is also electrically connected to the plunger pump 3, the rotary motor, the flow meter 4 and the retractable cross arm 8 to control the operation of the above components. After the controller controls the operation of the above components, the atomizing nozzle 9 is aimed at the fire point to achieve accurate fire extinguishing at the fire point.

[0034] Since the electric vehicle shed is large, the infrared image taken by the infrared thermal imaging camera of only a single fire extinguishing device is difficult to completely cover the entire electric vehicle shed. Therefore, multiple fire extinguishing devices may be installed for different electric vehicle sheds according to their area and the fire extinguishing area that can be covered by a single fire extinguishing device. The infrared images taken by the infrared thermal imaging cameras of each fire extinguishing device have overlapping areas at the edge positions. The infrared images taken by the infrared thermal imaging cameras of all the fire extinguishing devices cover the entire electric vehicle shed to ensure that there are no blind spots in the electric vehicle shed.

[0035] If a fire occurs in the overlapping area, two or more fire extinguishing devices may be triggered at the same time. In order to avoid the simultaneous operation of two or more fire extinguishing devices, each fire extinguishing device is electrically connected to a master controller. When a fire occurs in the overlapping area of ​​two or more fire extinguishing devices, the two or more fire extinguishing devices will simultaneously determine the fire signal and send it to the master controller. The master controller will send a fire extinguishing signal to one of the fire extinguishing devices, and the corresponding fire extinguishing device will extinguish the fire.

[0036] Embodiment 2: A method for extinguishing a fire in an electric vehicle shed, comprising the following steps: S1: The infrared thermal imaging cameras in all the fire extinguishing devices respectively take infrared images of a certain area of ​​the electric vehicle shed; the infrared images taken by the infrared thermal imaging cameras in each fire extinguishing device have overlapping areas, and the areas taken by all the infrared images can cover the entire electric vehicle shed area; the infrared images taken by the corresponding infrared thermal imaging cameras are uploaded to the controller in the corresponding fire extinguishing device; S2: A controller in the corresponding fire extinguishing device divides the corresponding infrared image into a number of rectangular grids using a grid division method; Assume that a certain infrared image is a rectangular image; assume that the infrared image is divided into m*n rectangular grids, where m represents the number of rectangular grids in a row of the infrared image, and n represents the number of rectangular grids in a column of the infrared image; in this embodiment, in order to enable the fire detection system to accurately identify fires, it is necessary to design the size of the divided grids. In this embodiment, any grid size of the m*n rectangular grids represents a projection area of ​​2cm*2cm in actual conditions.

[0037] In an infrared image, because the captured image is an infrared image, i.e., a heat map, the higher the temperature of each rectangular grid, the brighter the color of the grid area. In this embodiment, the fire automatic controller combines the color of each rectangular grid in the infrared image with the color coding to interpret the highest temperature of each rectangular grid in the infrared image. This method is an existing brightness temperature measurement method and will not be described in detail.

[0038] S3: For a fire extinguishing device, if the highest temperature of six consecutive rectangular grids in the infrared image of the fire extinguishing device exceeds 400 degrees Celsius, it is determined that a fire has occurred in the actual area represented by the six consecutive rectangular grids corresponding to the fire extinguishing device.

[0039] The reason for setting six continuous rectangular grids is to prevent false triggering. Unextinguished cigarette butts or lighter flames in the electric shed will also be captured by the image taken by the infrared thermal imaging camera, and the temperature of the above heat source is greater than 400 degrees Celsius. However, for the above two situations, after grid division, only the highest temperature of one or two consecutive rectangular grids can exceed 400 degrees Celsius, and it is difficult to achieve six consecutive rectangular grids exceeding 400 degrees Celsius, so the purpose of preventing false triggering is achieved.

[0040] The conditions that must be met for Z rectangular grids to be continuous rectangular grids are: (1) The figure composed of Z rectangular grids is uninterrupted; (2) Any rectangular grid among the Z rectangular grids is not connected to any of the four corner points of any rectangular grid among the other Z-1 rectangular grids; S4: According to the rectangular grid with a temperature exceeding 400 degrees Celsius in S3, the corresponding fire extinguishing device determines the actual plane coordinate set of the ignition point X ; Specifically, after obtaining the rectangular grids with the highest temperature exceeding 400 degrees Celsius in S3, the rectangular grids with the highest temperature exceeding 400 degrees Celsius are regarded as the burning rectangular grids. Each burning rectangular grid corresponds to the projection area in the actual situation. Therefore, the plane coordinates of the burning point in the actual situation can be obtained according to the burning rectangular grid. One burning rectangular grid represents one burning coordinate. Assuming that there are M continuous rectangular grids with temperatures exceeding 400 degrees, there are M burning coordinates. The M burning coordinates are stored in the form of a set in X middle.

[0041] S5: Similarly, the controllers in other fire extinguishing devices determine the corresponding fire point coordinate sets; all controllers that determine the fire point coordinates send the corresponding fire point coordinate sets to the master controller; controllers that do not determine the fire do not send signals to the master controller; S6: The main controller receives the ignition coordinate set and makes a judgment; If there are no repeated ignition point coordinates in all ignition point coordinate sets, the master controller sends a fire extinguishing signal to all controllers that send ignition point coordinate sets; If some of the ignition point coordinates in two or more ignition point coordinate sets are repeated, the master controller still sends a fire extinguishing signal to all controllers that sent the ignition point coordinate sets; because only some of the ignition point coordinates are repeated, it does not affect two or more fire extinguishing devices extinguishing the same ignition point coordinates; If there are two or more sets of ignition point coordinates that are completely identical, it is considered that the two or more ignition points are completely identical, and the master controller sends a fire extinguishing signal to one of the controllers that sent the ignition point coordinate sets; S7: After the corresponding fire extinguishing device controller receives the fire extinguishing signal, the fire extinguishing device obtains the corresponding actual ignition point plane coordinate set according to S4 X , combined with the known initial position of the atomizing nozzle of the fire extinguishing device Y By inversely solving the problem, the telescopic length U of the telescopic cross arm and the forward and reverse rotation angle θ of the rotating motor are solved, and the telescopic cross arm and the rotating motor are controlled accordingly according to U and θ, so that the atomizing nozzle is aimed at the ignition point.

[0042] Specifically, the controller determines that a fire has occurred in some rectangular grids based on the infrared image. Some of the grids correspond to a certain location in the actual situation. In other words, the controller learns that a fire has occurred at a certain location. The controller first obtains the plane coordinate set of the ignition point at the fire location. X Assume that before the telescopic cross arm is extended and the rotating motor is not rotating, the position of the atomizing nozzle is a known plane coordinate, which is set as the initial position point. The plane coordinate of the initial position point is marked as Y . Known initial position point Yand the ignition point plane coordinate set X According to one of the coordinates in the figure, the telescopic length U of the telescopic cross arm and the forward and reverse angle θ of the rotating motor are calculated by inverse solution. The control controls the telescopic cross arm to extend and retract and the rotating motor to rotate according to U and θ, so that the atomizing nozzle is aimed at the ignition point.

[0043] S8: After the controller of the corresponding fire extinguishing device controls the atomizing nozzle to aim at the fire point, the controller of the fire extinguishing device controls the plunger pump to extract the fire extinguishing agent, and the fire extinguishing agent is sprayed from the atomizing nozzle to extinguish the fire point; the flow meter 4 records the flow of the fire extinguishing agent and feeds it back to the controller of the fire extinguishing device. When the flow reaches the threshold set in the controller of the fire extinguishing device, the fire extinguishing device stops. The fire extinguishing device aims at the plane coordinate set of the fire point. X A fire coordinate is used to extinguish the fire, and the plane coordinate set is calculated. X Other ignition coordinates and the current position of the atomizer nozzle continue to drive the atomizer nozzle to move to the plane coordinate set X At other ignition coordinate positions, for the plane coordinate set X The other burning coordinates are extinguished once until the plane coordinates are collected. X All the ignition point coordinates are extinguished once; repeat S1-S8, if the ignition point is not extinguished, the fire extinguishing device will repeat the extinguishing several times until the ignition point is completely extinguished.

[0044] Example 3: See Figure 2 , an electric vehicle carport fire extinguishing device, which is different from the first embodiment in that, in the present embodiment, a retractable column is used to replace the column in the first embodiment, and the retractable column is a linear slide rail, which is vertically arranged, and the slider of the linear slide rail can move vertically. The aforementioned retractable cross arm is fixed to the slider of the linear slide rail through a bracket.

[0045] In this embodiment, because the slider of the linear slide rail can be raised and lowered, the atomizing nozzle and the retractable cross arm can be raised and lowered vertically as a whole, so as to achieve the purpose of flexibly changing the height of the atomizing nozzle; when the height of the atomizing nozzle needs to be manually adjusted, the retractable column is manually opened by the operator to achieve the purpose of raising and lowering the atomizing nozzle.

Claims

1. An electric vehicle carport fire extinguishing device, characterized in that: It includes a fire extinguishing agent configuration mechanism, a fire extinguishing adjustment mechanism, a metal high-pressure hose (5) and a fire detection system; The metal high-pressure hose (5) connects the fire extinguishing agent configuration mechanism and the fire extinguishing agent adjustment mechanism, and the fire extinguishing agent configuration mechanism can pump the fire extinguishing agent to the fire extinguishing agent adjustment mechanism through the metal high-pressure hose (5); The fire detection system is used to detect the coordinates of the fire point, control the fire extinguishing regulating mechanism to aim at the fire point, and pump the fire extinguishing agent to the fire extinguishing regulating mechanism to extinguish the fire at the fire point; Fire extinguishing regulation mechanism includes: The base (6) is placed on the ground of the electric vehicle shed and has a cavity inside; The column (7) is rotatably connected to the base (6) and can rotate horizontally; a rotating motor for rotating the column (7) is provided in the cavity; A retractable cross arm (8) is mounted on the upper end of the column (7); The atomizing nozzle (9) is installed on the telescopic cross arm (8), can move in the horizontal direction under the action of the telescopic cross arm (8), and can rotate horizontally with the column (7) as a whole with the telescopic cross arm (8); one end of the metal high-pressure hose (5) is connected to the atomizing nozzle (9).

2. The electric vehicle carport fire extinguishing device according to claim 1, characterized in that: The fire extinguishing agent configuration mechanism comprises: A movable frame (1) capable of being moved; A liquid storage tank (2) is mounted on the movable frame (1); a stirrer (10) for stirring the fire extinguishing agent in the liquid storage tank (2) is mounted on the top of the liquid storage tank (2); A plunger pump (3) is mounted on a movable frame (1); a liquid inlet end of the plunger pump (3) is connected to a liquid storage tank (2) via a water inlet pipe (11); a flow meter (4) is mounted on a liquid outlet end of the plunger pump (3); and the liquid outlet end of the plunger pump (3) is connected to the other end of a metal high-pressure hose (5).

3. The electric vehicle carport fire extinguishing device according to claim 2, characterized in that: The fire detection system comprises: The infrared thermal imaging camera is installed on the top of the electric vehicle shed and can take infrared images of a certain area of ​​the electric vehicle shed from a bird's-eye view; The automatic fire controller can receive infrared images taken by an infrared thermal imaging camera and determine the coordinates of the ignition point based on the infrared images. The automatic fire controller is electrically connected to the plunger pump (3), the rotary motor, the flow meter (4) and the retractable cross arm (8) and can control the operation of the plunger pump (3), the rotary motor and the retractable cross arm (8) so that the atomizing nozzle (9) is aimed at the ignition point to spray the fire extinguishing agent.

4. The electric vehicle carport fire extinguishing device according to claim 3, characterized in that: The electric vehicle carport is provided with a plurality of fire extinguishing devices, all of which are electrically connected to a master controller, and all of which can send the coordinates of the ignition point to the master controller, which then selects a fire extinguishing device to extinguish the fire.

5. The electric vehicle carport fire extinguishing device according to claim 2, characterized in that: The liquid outlet end of the plunger pump (3) is provided with a threaded joint, the atomizing nozzle (9) is also provided with a threaded joint, and the two ends of the metal high-pressure hose (5) are respectively connected through threaded joints; the diameter of the metal high-pressure hose (5) has various specifications.

6. The electric vehicle carport fire extinguishing device according to claim 4, characterized in that: A telescopic column is used to replace the column (7), the telescopic column is a linear slide rail (12), and the telescopic cross arm (8) is installed on a slider (13) of the linear slide rail (12) through a bracket (14).

7. A method for extinguishing a fire in an electric vehicle shed, based on the fire extinguishing device for an electric vehicle shed according to claim 4 or 6, characterized in that: The following steps are involved: S1: The infrared thermal imaging cameras in all the fire extinguishing devices respectively take infrared images of a certain area of ​​the electric vehicle shed; the infrared images taken by the infrared thermal imaging cameras in each fire extinguishing device have overlapping areas, and the areas taken by all the infrared images can cover the entire electric vehicle shed area; the infrared images taken by the corresponding infrared thermal imaging cameras are uploaded to the controller in the corresponding fire extinguishing device; S2: A controller in the corresponding fire extinguishing device divides the corresponding infrared image into a number of rectangular grids using a grid division method; S3: The controller in the corresponding fire extinguishing device determines the highest temperature of all rectangular grids in the corresponding infrared image; S4: For a controller in a fire extinguishing device, if the highest temperature of Z consecutive rectangular grids in the corresponding infrared image exceeds T degrees Celsius, it is considered that a fire has occurred in the actual area represented by the Z rectangular grids; the controller obtains the actual ignition point coordinate set X ; Any rectangular grid with a temperature exceeding T represents an ignition coordinate, and the ignition coordinates of all consecutive rectangular grids with a temperature exceeding T are stored in a collection X middle; The conditions that must be met for Z rectangular grids to be continuous rectangular grids are: (1) The figure composed of Z rectangular grids is uninterrupted; (2) Any rectangular grid among the Z rectangular grids is not connected to any of the four corner points of any rectangular grid among the other Z-1 rectangular grids; S5: Similarly, the controllers in other fire extinguishing devices determine the corresponding ignition point coordinate sets; all controllers that determine the ignition point coordinates send the corresponding ignition point coordinate sets to the master controller; controllers that do not determine ignition do not send signals to the master controller; S6: The main controller receives the ignition coordinate set and makes a judgment; If there are no repeated ignition point coordinates in all ignition point coordinate sets, the master controller sends a fire extinguishing signal to all controllers that send ignition point coordinate sets; If some of the ignition point coordinates in two or more ignition point coordinate sets are repeated, the master controller still sends a fire extinguishing signal to all controllers that sent the ignition point coordinate sets; If there are two or more sets of ignition point coordinates that are exactly the same, the master controller sends a fire extinguishing signal to one of the controllers that sent the ignition point coordinate sets; S7: After the corresponding fire extinguishing device controller receives the fire extinguishing signal, the fire extinguishing device obtains the corresponding actual ignition point plane coordinate set according to S4 X , combined with the known initial position of the atomizing nozzle of the fire extinguishing device Y , by the reverse solution method, the telescopic length U of the telescopic cross arm and the forward and reverse rotation angle θ of the rotating motor are solved, and the telescopic cross arm and the rotating motor are controlled accordingly according to U and θ, so that the atomizing nozzle is aimed at the ignition point; S8: After the controller of the corresponding fire extinguishing device controls the atomizing nozzle to aim at the fire point, the controller of the fire extinguishing device controls the plunger pump to extract the fire extinguishing agent, and the fire extinguishing agent is sprayed out from the atomizing nozzle to extinguish the fire point; the flow meter records the flow of the fire extinguishing agent and feeds back to the controller of the fire extinguishing device. When the flow reaches the threshold set in the controller of the fire extinguishing device, the fire extinguishing device stops. The fire extinguishing device aims at the plane coordinate set of the fire point. X A fire coordinate is used to extinguish the fire, and the plane coordinate set is calculated. X Other ignition coordinates and the current position of the atomizer nozzle continue to drive the atomizer nozzle to move to the plane coordinate set X At other ignition coordinate positions, for the plane coordinate set X The other burning coordinates are extinguished once until the plane coordinates are collected. X All the ignition point coordinates are extinguished once; repeat S1-S8, if the ignition point is not extinguished, the corresponding fire extinguishing device will repeat the extinguishing several times until the ignition point is completely extinguished.

8. The method for extinguishing fire in an electric vehicle shed according to claim 7, characterized in that: In step S4, Z=6, T=400; each rectangular grid represents a projection area of ​​2cm*2cm in actual situation.

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