Hydraulic drive drilling jet fire extinguishing device and method for chassis of electric vehicle

Abstract

The invention belongs to the technical field of new energy automobile fire extinguishing, and particularly relates to an electric automobile chassis hydraulic drive drilling jet fire extinguishing device and method, and the device comprises a moving and lifting unit, a limiting and fixing unit, a hydraulic drive unit and a rotary cutting nozzle; the moving and lifting unit is a moving and lifting mechanism of the electromobile chassis hydraulically-driven drilling jet fire extinguishing device and is used for lifting the hydraulically-driven unit and the limiting and fixing unit; the limiting and fixing unit is used for ensuring the positioning of the device and the automobile chassis after the moving and lifting unit is lifted and the stability of the device for subsequent operation; the hydraulic driving unit is positioned below the limiting and fixing unit; and the rotary cutting spray head connected with the hydraulic driving unit is used for drilling the chassis of the electric vehicle and spraying a fire extinguishing agent to extinguish fire. The efficient and convenient fire extinguishing device and the fire extinguishing method are provided for fire disasters or potential thermal runaway caused by runaway of the battery of the new energy automobile.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle fire extinguishing, and in particular relates to a hydraulically driven drilling and jetting fire extinguishing device and method for an electric vehicle chassis. Background Art

[0003] Lithium-ion battery fire is one of the most common fires in electric vehicles. It has the characteristics of fast ignition, violent combustion, rapid fire spread, great destructiveness to the surrounding area, and easy generation of large amounts of toxic and harmful smoke. Since the battery pack is installed on the chassis of the car and has a shell on the outside of the battery pack, the existing ordinary fire guns, cannons and other fire-fighting equipment and conventional fire-fighting methods are limited by the body and battery pack shell, and cannot accurately apply fire-fighting media and quickly implement fire-fighting. There are prominent problems such as low fire-fighting efficiency, long time, difficulty in handling, and serious losses. It has become a global problem that plagues fire fighting and rescue.

[0004] At present, relevant research has begun to propose technical methods and devices for extinguishing fires from the bottom of the vehicle. For example: China Patent Publication No. CN221692643U discloses a new energy vehicle chassis fire extinguishing cart, which can be operated by one person through a push-in design, and quickly enters the power battery position under the vehicle chassis to release the fire extinguishing medium; CN117679689A discloses a hydraulically driven new energy vehicle fire extinguishing equipment, which uses a hydraulic drive method to drive the entire fire extinguishing equipment close to the bottom of the new energy vehicle, and uses a close-range fire extinguishing method to operate the fire point. However, although these solutions can release the fire extinguishing medium directly to the chassis of the vehicle, because the power battery of the electric vehicle is tightly wrapped by a metal shell, the fire extinguishing medium cannot pass through the alloy shell to enter the battery pack that has thermal runaway. Most of the fire extinguishing medium is applied to the surface of the battery pack shell and then lost, and it has no fire extinguishing effect at all.

[0005] Therefore, it is necessary to penetrate the chassis armor and battery shell of electric vehicles and directly deliver the fire extinguishing medium to the inside of the battery pack to achieve efficient fire extinguishing. However, existing puncture or demolition technologies such as ultra-high pressure fine water mist puncture spray guns (water jets) and fire axes require firefighters to fight close to each other, which is highly dangerous and not suitable for use in the confined space of the vehicle chassis; if pneumatic, hydraulic, electric drive and other puncture methods are used, complex power systems need to be integrated, and the puncture effect generated by the release in a limited space such as the chassis is limited, and it is difficult to penetrate the protective armor and the battery pack shell at the same time. Violent impact puncture can also easily cause battery fires and explosions. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a hydraulically driven drilling and jetting fire extinguishing device and method for an electric vehicle chassis.

[0007] According to an embodiment of the present invention, the first solution provided is: a hydraulic-driven drilling and spraying fire extinguishing device for an electric vehicle chassis; comprising a moving and lifting unit, a limiting and fixing unit, a hydraulic driving unit, and a rotating cutting nozzle;

[0008] The moving and lifting unit is a moving and lifting mechanism of the hydraulic-driven drilling and spraying fire extinguishing device for the electric vehicle chassis, and is used for lifting the hydraulic driving unit and the limiting and fixing unit;

[0009] The limiting and fixing unit is used to ensure the positioning of the device and the vehicle chassis after the moving and lifting unit is lifted and the stability of the device during subsequent operations;

[0010] The hydraulic driving unit is located below the limiting and fixing unit;

[0011] The rotating cutting nozzle connected to the hydraulic driving unit is used to drill holes in the electric vehicle chassis and spray fire extinguishing agent to extinguish fires.

[0012] Further, the limiting and fixing unit has a main body which is a support plate, and the support plate is a rectangular platform;

[0013] The support plate is fixedly connected to the moving and lifting unit, and a circular hole is provided at its exact center;

[0014] A positioning and clamping device is also provided on the platform, and the positioning and clamping device is three support columns distributed in a triangular shape around the outside of the circular hole;

[0015] The bottom of the support column is cylindrical and the top is conical; it is used to ensure the positioning of the equipment and the vehicle chassis after the moving and lifting unit is lifted and the stability of the equipment during subsequent operations.

[0016] Further, the hydraulic driving unit is loaded below the limiting and fixing unit, and includes;

[0017] An inlet water turbine housing,

[0018] The water turbine housing is divided into a housing body and an intermediate isolation layer. The intermediate isolation layer divides the internal space of the housing into two water inlet spaces, an upper cavity and a lower cavity. An inlet and an outlet are provided on the housing, and the outlet is only connected to the lower cavity. The inlet can communicate with both the upper cavity and the lower cavity. The flow direction of the water entering the upper cavity or the lower cavity is controlled by a flow direction device at the connection of the inlet and the housing;

[0019] The inlet is connected to a fire hose to obtain external fire water. After the water flows in, it impacts the water turbine impeller arranged in the lower space. The water turbine impeller rotates around the main shaft, and the main shaft is fixed on the inner wall of the inlet water turbine housing in the lower cavity.

[0020] Further, a blind hole for accommodating an elastic member is provided at the center of the water turbine impeller, and the blind hole is concentric with the circular hole on the support plate and the main shaft;

[0021] The outer side of the blind hole of the water turbine impeller is mechanically sealed with the middle isolation layer;

[0022] A connecting piece is arranged at the upper end of the blind hole. The connecting piece is in the shape of a hollow cylinder. A slideway is arranged on the side wall of the connecting piece. The outer diameter of the connecting piece is smaller than the inner diameter of the round hole; the connecting piece is in the upper cavity position.

[0023] Further, a rotary cutting nozzle is connected to the water turbine impeller. A follower is arranged at the lower part of the rotary cutting nozzle. The follower is stuck into the slideway of the connecting piece. The part of the follower protruding out of the chute of the connecting piece is a latch. When the impeller is not started, the latch is connected to the fixed pin arranged on the inner side of the round hole;

[0024] The lower end of the follower is connected to an elastic member arranged in the blind hole; the elastic member is a spring;

[0025] When the impeller rotates, the impeller drives the rotary cutting nozzle to rotate through the connecting piece and the follower. The latch disengages from the fixed pin. Due to the action of the spring, the follower is pushed, so that the rotary cutting nozzle moves upward along the slideway. The impeller continuously drives the rotary cutting nozzle to rotate through the connecting piece and the follower for cutting operation. The length of the slideway controls the stroke of the cutting operation.

[0026] Further, the rotary cutting nozzle is a hollow cylinder. The top end is a cemented carbide drill bit sufficient to drill through the lower box body of the battery pack. The lower part of the drill bit is a stepped circular cylindrical body. The diameter of the side of the stepped circular cylindrical body far from the drill bit is larger than the side close to the drill bit. The transition at the stepped part is smooth. The internal hollow structure is a fire extinguishing medium flow channel;

[0027] Small holes are evenly opened on the surface of the stepped circular cylindrical body close to the drill bit.

[0028] Further, the flow direction device arranged at the connection position of the water inlet and the upper cavity and the lower cavity is a baffle. The baffle controls the action of the baffle through the claws arranged on the support plate, so as to control the water flow flowing into the water inlet to enter the two upper cavities or the lower cavity;

[0029] The baffle passes through the baffle hole arranged on the water turbine housing and the support plate and is detachably connected to the claws on the support plate;

[0030] The claw is in the shape of a T, and is composed of a rotating shaft and a rotating arm. One end of the rotating shaft is rotatably fixed on the support plate, and the other end is connected with a rotating arm. The rotating arm is in the shape of a zigzag. One end is located at the stepped part of the stepped circular cylindrical body, and the other end is detachably connected to the baffle;

[0031] The baffle includes a connecting head and a plate body connected to the connecting head. The plate body is divided into upper and lower parts. The part of the upper part close to the connecting head is a perforated plate structure, and the part of the lower part far from the connecting head is a flat plate structure without holes.

[0032] Further, the moving and lifting unit includes lower support linkages and upper support linkages; there are two sets of lower support linkages and two sets of upper support linkages, which are respectively arranged on both sides of the limit fixing unit;

[0033] The lower support linkages and upper support linkages on the same side are connected with a rotating rod and a sliding rod; the middle parts of the rotating rod and the sliding rod are connected by a hinge, and the rotating rod and the sliding rod are rotatably connected together;

[0034] Both ends of the rotating rod are respectively rotatably and fixedly connected to the first ends of the lower support linkage and the upper support linkage; the first ends of the lower support linkage and the upper support linkage are located on opposite sides;

[0035] Both ends of the sliding link are respectively slidably connected in the sliding grooves at the second ends of the lower support linkage and the sliding grooves at the second ends of the upper support linkage;

[0036] The sliding rod slides in the sliding grooves of the lower support linkage and the upper support linkage to generate displacement; at the same time, the rotating rod rotates around the hinge as the center;

[0037] By changing the angle between the rotating rod and the sliding rod, the limit fixing unit is raised or lowered.

[0038] Further, one ends of the two sets of sliding rods connected to the lower support linkages are connected with a sliding link;

[0039] Fixed links are connected to the outer sides of the sliding grooves at the second ends of the two sets of lower support linkages;

[0040] Screw holes are provided on the fixed links, and a rotating handle and an extension rod are connected in the screw holes;

[0041] One end of the rotating handle and the extension rod is rotatably connected to the sliding link;

[0042] The sliding link is driven to move by the rotating handle and the extension rod;

[0043] Wheels are also provided on the lower support linkages.

[0044] According to the implementation scheme of the present invention, by using the electric vehicle chassis hydraulic drive drilling and spraying fire extinguishing device in the first scheme provided by the present invention, the second scheme is provided as follows:

[0045] An electric vehicle chassis hydraulic drive drilling and spraying fire extinguishing method, using the electric vehicle chassis hydraulic drive drilling and spraying fire extinguishing device, moving the fire extinguishing device under the vehicle chassis, introducing fire fighting water, and completing the fire extinguishing operation.

[0046] Compared with the prior art, the beneficial effects of the technical solution provided by this application.

[0047] 1. When dealing with a fire in a new energy vehicle battery, move the device involved in this application to the bottom of the vehicle where thermal runaway occurs or is about to occur, with the device located below the battery part set at the chassis position. Just connect a fire water source with a certain pressure, and the hydraulic-driven drilling and spraying device can penetrate the lower box body of the battery pack within a certain time, directly deliver the fire extinguishing medium into the battery pack to submerge the battery modules and achieve fire extinguishing, dealing with the problem from the source of ignition, greatly improving the fire extinguishing efficiency and preventing the occurrence of secondary fires.

[0048] 2. This device is easy to use. It can use the existing fire water source or drive other fire extinguishing media with the fire water source, without the need to provide an additional power source, and has a wide range of applicability.

[0049] 3. It is convenient to operate. Just move the device designed in this application to the position of the battery module at the lower part of the vehicle chassis and start the water source to complete all fire extinguishing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Among them:

[0052] Figure 1 is a schematic diagram of the overall structure of the hydraulic-driven drilling and spraying fire extinguishing device for an electric vehicle chassis in an embodiment;

[0053] Figure 2 is a side view of the hydraulic-driven drilling and spraying fire extinguishing device for an electric vehicle chassis in an embodiment;

[0054] Figure 3 is Figure 2 a cross-sectional view of the A-A cutting plane of

[0055] Figure 4 is a schematic diagram of the internal structure of the hydraulic drive unit and the rotary cutting nozzle;

[0056] Figure 5 is Figure 4 a cross-sectional view of the B-B cutting plane of

[0057] Figure 6 is a schematic diagram of the connection structure of the hydraulic drive unit and the rotary cutting nozzle Figure 1 ;

[0058] Figure 7 is a schematic diagram of the connection structure of the hydraulic drive unit and the rotary cutting nozzleFigure 2 ;

[0059] Figure 8 Schematic diagram and partial enlarged view of the jaw and baffle of an embodiment;

[0060] Figure 9 Schematic diagrams of different states of the baffle controlling the water inlet space of an embodiment.

[0061] Reference numerals:

[0062] 1. Moving and lifting unit; 11. Rotating handle and extension rod; 12. Fixed connecting rod; 13. Sliding connecting rod; 14. Rotating rod; 15. Sliding rod; 16. Lower support connecting rod; 17. Upper support connecting rod; 18. Wheel;

[0063] 2. Limit fixing unit; 21. Support plate; 22. Positioning and clamping device;

[0064] 3. Hydraulic drive unit; 31. Turbine housing; 311. Upper cavity; 312. Lower cavity; 32. Water inlet; 33. Water outlet; 34. Turbine impeller; 35. Turbine main shaft; 36. Elastic member; 37. Fixed pin; 38. Jaw; 39. Baffle;

[0065] 4. Rotating cutting nozzle; 41. Drill bit; 42. Reducing circular cylindrical body; 43. Fire extinguishing medium flow channel; 44. Small hole; 45. Connecting member; 46. Driven member; 47. Snap pin. Detailed implementation manners

[0066] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of this application.

[0067] In order to address the deficiencies in the existing fire-fighting means for new energy electric vehicles, this application proposes an electric vehicle chassis hydraulic drive drilling and spraying fire extinguishing device and method. When dealing with the fire of a new energy vehicle battery, move the device involved in this application to the bottom of the vehicle where a fire occurs or is about to occur due to thermal runaway. The device is located below the battery part set at the chassis position. Just connect a fire-fighting water source with a certain pressure, and the hydraulic drive drilling and spraying device can penetrate the lower box body of the battery pack within a certain time, directly deliver the fire extinguishing medium into the battery pack to submerge the battery modules to achieve fire extinguishing, and deal with it from the source of ignition, greatly improving the fire extinguishing efficiency and preventing the occurrence of secondary fires.

[0068] During the design process of the hydraulic drive drilling and spraying fire extinguishing device for the electric vehicle chassis of the present application, the module units are divided according to functions and structures, which not only facilitates the design but also provides convenience for later improvement, development, maintenance, and replacement of modules.

[0069] A hydraulic drive drilling and spraying fire extinguishing device for an electric vehicle chassis includes four functional modules: a moving and lifting unit 1, a limit fixing unit 2, a hydraulic drive unit 3, and a rotating cutting nozzle 4.

[0070] The moving and lifting unit 1 is the moving and lifting mechanism of the hydraulic drive drilling and spraying fire extinguishing device for the electric vehicle chassis. To facilitate entry into the vehicle chassis, it generally has a "sheet-like" structure, and the power sources for moving and lifting include but are not limited to battery motor drive, manual pushing, etc.

[0071] As Figure 1-2 shown, the overall structure of the hydraulic drive drilling and spraying fire extinguishing device for the electric vehicle chassis of the present application is shown.

[0072] The present application provides a typical embodiment. In this embodiment, a moving and lifting unit 1 in the form of a connecting rod structure that only requires manual operation and does not require any external force assistance is provided, and the hydraulic drive unit 3 arranged on the moving and lifting unit 1 is lifted and lowered by means of a fork arm lifting method;

[0073] The moving and lifting unit 1 includes a lower support connecting rod 16 and an upper support connecting rod 17; both the lower support connecting rod 16 and the upper support connecting rod 17 are in two groups and are respectively arranged on both sides of the limit fixing unit 2;

[0074] The lower support connecting rod 16 and the upper support connecting rod 17 on the same side are connected with a rotating rod 14 and a sliding rod 15; the middle of the rotating rod 14 and the middle of the sliding rod 15 are connected by a hinge, and the rotating rod 14 and the sliding rod 15 are rotatably connected together.

[0075] The two ends of the rotating rod 14 are respectively rotatably and fixedly connected to the first end of the lower support connecting rod 16 and the first end of the upper support connecting rod 17; the first ends of the lower support connecting rod 16 and the upper support connecting rod 17 are located on opposite sides;

[0076] The two ends of the sliding rod 15 are respectively slidably connected to the chutes at the second ends of the lower support connecting rod 16 and the upper support connecting rod 17;

[0077] One ends of the two groups of sliding rods 15 connected to the lower support connecting rod 16 are connected with a sliding connecting rod 13;

[0078] The outer sides of the chutes at the second ends of the two groups of lower support connecting rods 16 are connected with a fixed connecting rod 12;

[0079] The fixed connecting rod 12 is provided with a threaded hole, and a rotating handle and an extension rod 11 are connected in the threaded hole;

[0080] One end of the rotating handle and the extension rod 11 is rotatably connected to the sliding connecting rod 13.

[0081] The lower support connecting rod 16 is further provided with a wheel 18.

[0082] By driving the sliding connecting rod 13 to move with the rotating handle and the extension rod 11, the sliding rod 15 is further caused to slide in the chutes of the lower support connecting rod 16 and the upper support connecting rod 17, generating a displacement; at the same time, the rotating rod 14 rotates around the hinge as the center.

[0083] By changing the angle between the rotating rod 14 and the sliding rod 15, the limit fixing unit 2 is raised or lowered.

[0084] The limit fixing unit 2 has a main body of a support plate 21, and the support plate is a rectangular platform;

[0085] The support plate 21 is fixedly connected to the moving and lifting unit 1, and a circular hole is provided at its exact center;

[0086] The platform is further provided with a positioning and clamping device 22, and the positioning and clamping device 22 is three support columns distributed in a triangular shape around the outside of the circular hole;

[0087] The bottom of the support column is cylindrical and the top is conical; it is used to ensure the positioning of the equipment with the vehicle chassis after the moving and lifting unit 1 is lifted and the stability of the equipment for subsequent operations.

[0088] The support plate 21 is further provided with other holes for connecting and installing other devices.

[0089] As Figure 2-7 shown, the structure of the hydraulic drive unit and the structure and connection relationship of the rotary cutting nozzle are shown.

[0090] The hydraulic drive unit 3 is loaded below the limit fixing unit 2 and includes;

[0091] The water turbine housing 31,

[0092] The water turbine housing 31 is divided into a housing body and an intermediate isolation layer. The intermediate isolation layer divides the internal space of the housing into two water inlet spaces, an upper cavity 311 and a lower cavity 312. The housing is provided with a water inlet 32 and a water outlet 33. The water outlet is only connected to the lower cavity 312, and the water inlet can be communicated with both the upper cavity 311 and the lower cavity 312. The flow direction of the water flow into the upper cavity 311 or the lower cavity 312 is controlled by a flow direction device at the connection of the water inlet and the housing.

[0093] The water inlet 32 is connected to a fire hose to obtain external high-pressure fire water. After the water flows in, it impacts the water turbine impeller 34 arranged in the lower space. The water turbine impeller 34 rotates around the main shaft 35, and the main shaft 35 is fixed on the inner wall of the water turbine housing 31 of the lower cavity 312.

[0094] A blind hole for accommodating the elastic member 36 is provided in the center of the water turbine impeller 34. The blind hole is concentric with the round hole on the support plate 21 and the main shaft 35.

[0095] The outside of the blind hole of the water turbine impeller 34 is mechanically sealed with the middle isolation layer.

[0096] A connecting member 45 is provided at the upper end of the blind hole. The connecting member 45 is in the shape of a hollow cylinder, and a slideway is provided on the side wall of the cylinder. The outer diameter of the connecting member 45 is smaller than the inner diameter of the round hole. The connecting member 45 is located at the upper cavity 311 position.

[0097] The rotary cutting nozzle 4 is connected to the water turbine impeller 34. A driven member 46 is provided at the lower part of the rotary cutting nozzle 4. The driven member 46 is stuck into the slideway of the connecting member 45. The part of the driven member 46 protruding from the slideway of the connecting member 45 is a retaining pin 47. When the impeller is not started, the retaining pin 47 is connected to the fixed pin 37 arranged on the inner side of the round hole.

[0098] The lower end of the driven member 46 is connected to the elastic member 36 arranged in the blind hole. The elastic member 36 is preferably a spring.

[0099] When the impeller rotates, the impeller drives the rotary cutting nozzle 4 to rotate through the connecting member 45 and the driven member 46. The retaining pin 47 disengages from the fixed pin 37. Due to the action of the spring, the driven member 46 is pushed, so that the rotary cutting nozzle 4 moves upward along the slideway. The impeller continuously drives the rotary cutting nozzle 4 to rotate through the connecting member 45 and the driven member 46 for cutting operation. The length of the slideway controls the stroke of the cutting operation.

[0100] The rotary cutting nozzle 4 is a hollow cylinder. The top end is a cemented carbide drill bit 41 sufficient to drill through the lower box body of the battery pack. The lower part is a stepped circular cylindrical body 42. For the stepped circular cylindrical body 42, the diameter on the side away from the drill bit 41 is larger than the side close to the drill bit 41, and the transition at the stepped part is smooth. The internal hollow structure is the fire extinguishing medium flow channel 43.

[0101] Small holes 44 are evenly opened on the surface of the stepped circular cylindrical body 42 close to the drill bit 41.

[0102] As Figure 8-9 shown, it shows the action relationship and state of the flow direction device controlling the water flow into different cavities.

[0103] The flow direction device provided at the connection position between the water inlet and the upper cavity 311 and the lower cavity 312 is a baffle 39. The baffle controls the movement of the baffle 39 through the claw 38 provided on the support plate 21, thereby controlling the water flow flowing in from the water inlet to enter the two upper cavities 311 or the lower cavity 312.

[0104] The baffle 39 passes through the baffle holes provided on the turbine housing 31 and the support plate 21 and is detachably connected to the claw 38 on the support plate 21.

[0105] The claw 38 is T-shaped and consists of a rotating shaft and a rotating arm. One end of the rotating shaft is rotatably fixed on the support plate 21, and the other end is connected with a rotating arm. The rotating arm is zigzag-shaped. One end is located at the variable diameter of the variable diameter circular cylindrical body 42, and the other end is detachably connected to the baffle 39.

[0106] The baffle 39 includes a connection head and a plate body connected to the connection head. The plate body is divided into upper and lower parts. The part of the upper part close to the connection head is a perforated plate structure, and the part of the lower part far from the connection head is a flat plate structure without holes.

[0107] When the fire fighting water source is not introduced, the claw fixes the baffle, and the lower part of the baffle is located in the water inlet channel of the upper cavity 311 to prevent water flow from entering; at this time, all the water flow enters the lower cavity 312 to drive the turbine to rotate.

[0108] When the fire fighting water source is introduced and the turbine rotates, the variable diameter part gradually squeezes the claw. When it reaches the maximum variable diameter, it is also the position where the drilling of the rotary cutting nozzle 4 ends. The claw is completely separated from the connection head due to being squeezed, and the baffle drops. The lower part of the baffle is located in the water inlet channel of the lower cavity 312 to prevent water flow from entering; the upper part of the baffle is located in the water inlet channel of the upper cavity 311. Also, because the upper part of the baffle is a perforated plate structure, water flow can enter the upper cavity 311; the water flow enters the fire extinguishing medium flow channel 43 and the small holes 44 of the rotary cutting nozzle 4 through the slideway of the connecting member 45 and is sprayed into the chassis and battery pack space of the new energy vehicle to complete the fire extinguishing operation.

[0109] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope recorded in this specification.

[0110] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A hydraulically driven drilling and jetting fire extinguishing device for an electric vehicle chassis, characterized in that: It includes a moving and lifting unit, a position limiting and fixing unit, a hydraulic driving unit and a rotating cutting nozzle; The moving and lifting unit is a moving and lifting mechanism of the electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device, which is used to lift the hydraulic driving unit and the limiting fixing unit; The limit fixing unit is used to ensure the positioning of the device and the chassis of the vehicle after the mobile and lifting units are lifted and the stability of the device for subsequent operations; The hydraulic driving unit is located below the limiting fixing unit; The rotating cutting nozzle connected to the hydraulic drive unit is used to drill holes and spray fire extinguishing agent on the chassis of the electric vehicle to extinguish the fire.

2. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 1 is characterized in that: The limiting and fixing unit has a main body which is a supporting plate, and the supporting plate is a rectangular platform; The support plate is fixedly connected to the moving and lifting unit, and a circular hole is provided in the center thereof; The platform is also provided with a positioning clamping device, which is three supporting columns distributed in a triangular shape around the outside of the circular hole; The support column has a cylindrical bottom and a conical top; it is used to ensure the positioning of the equipment and the vehicle chassis after the mobile and lifting units are lifted and the stability of the equipment for subsequent operations.

3. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 1 is characterized in that: The hydraulic driving unit is loaded below the limiting fixing unit and includes: Inlet turbine casing, The turbine housing is divided into an outer shell and an intermediate isolation layer. The intermediate isolation layer divides the internal space of the housing into two water inlet spaces, an upper cavity and a lower cavity. A water inlet and a water outlet are arranged on the housing. The water outlet is only connected to the lower cavity. The water inlet can be connected to both the upper cavity and the lower cavity. Whether the water flows into the upper cavity or the lower cavity is controlled by a flow direction device at the connection between the water inlet and the housing. The water inlet is connected to a fire hose to obtain external fire water. After the water flows in, it hits the turbine impeller arranged in the lower space. The turbine impeller rotates around the main shaft, and the main shaft is fixed on the inner wall of the water inlet turbine shell of the lower cavity.

4. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 3 is characterized in that: A blind hole for accommodating the elastic member is arranged at the center of the turbine impeller, and the blind hole is concentric with the circular hole on the support plate and the main shaft; The outer side of the blind hole of the turbine impeller is mechanically sealed with the middle isolation layer; A connecting piece is arranged at the upper end of the blind hole. The connecting piece is in the shape of a hollow cylinder. A slideway is arranged on the side wall of the connecting piece. The outer diameter of the connecting piece is smaller than the inner diameter of the circular hole. The connecting piece is located in the upper cavity.

5. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 4 is characterized in that: The rotary cutting nozzle is connected to the turbine impeller. A follower is arranged at the lower part of the rotary cutting nozzle. The follower is inserted into the slideway of the connecting piece. The part of the follower protruding out of the slideway of the connecting piece is a bayonet. When the impeller is not started, the bayonet is connected with a fixing pin arranged on the inner side of the circular hole. The lower end of the follower is connected to an elastic member arranged in the blind hole; the elastic member is a spring; When the impeller rotates, the impeller drives the rotary cutting nozzle to rotate through the connecting piece and the follower, the locking pin disengages from the fixing pin, and the spring pushes the follower, causing the rotary cutting nozzle to move upward along the slideway. The impeller continuously drives the rotary cutting nozzle to rotate through the connecting piece and the follower to perform the cutting operation, and the length of the slideway controls the stroke of the cutting operation.

6. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 1, characterized in that: The rotary cutting nozzle is a hollow cylinder, with a top end being a carbide drill bit that is sufficient to drill through the lower box of the battery pack, and a lower portion being a variable diameter annular cylinder. The variable diameter annular cylinder has a diameter that is greater on the side away from the drill bit than on the side close to the drill bit, and the diameter change is smoothly transitioned, and the internal hollow structure is a flow channel for the fire extinguishing medium; Small holes are evenly opened on one side of the surface of the variable diameter annular cylinder close to the drill bit.

7. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 3 is characterized in that: The flow direction device arranged at the connection position between the water inlet and the upper cavity and the lower cavity is a baffle, and the movement of the baffle is controlled by the claws arranged on the support plate, thereby controlling the water flow flowing into the water inlet to enter the two upper cavities or the lower cavity; The baffle passes through the baffle holes provided on the turbine housing and the support plate and is detachably connected to the claws on the support plate; The claw is T-shaped and consists of a rotating shaft and a rotating arm. One end of the rotating shaft is rotatably fixed on the support plate, and the other end is connected to the rotating arm. The rotating arm is zigzag-shaped, one end is located at the diameter-changing part of the variable-diameter circular cylinder, and the other end is detachably connected to the baffle. The baffle includes a connector and a plate body connected to the connector. The plate body is divided into upper and lower parts. The upper part close to the connector is a perforated plate structure, and the lower part away from the connector is a flat plate structure without holes.

8. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to any one of claims 1 to 7, characterized in that: The moving and lifting unit includes a lower supporting link and an upper supporting link; the lower supporting link and the upper supporting link are both in two groups, which are respectively arranged on both sides of the limiting fixing unit; The lower supporting link and the upper supporting link on the same side are connected with a rotating rod and a sliding rod; the middle part of the rotating rod and the middle part of the sliding rod are connected by a hinge, and the rotating rod and the sliding rod are rotatably connected together; The two ends of the rotating rod are respectively rotatably fixedly connected to the first end of the lower supporting link and the first end of the upper supporting link; the first end of the lower supporting link and the first end of the upper supporting link are located on opposite sides; The two ends of the sliding link are slidably connected to the sliding groove of the second end of the lower supporting link and the sliding groove of the second end of the upper supporting link respectively; The sliding rod slides in the sliding grooves of the lower supporting link and the upper supporting link to generate displacement; at the same time, the rotating rod rotates around the hinge as the center; By changing the angle between the rotating rod and the sliding rod, the limit fixing unit is raised or lowered.

9. The electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device according to claim 8, characterized in that: One end of the two sets of sliding rods connected to the lower supporting link is connected with a sliding link; The outer sides of the slide grooves at the second ends of the two sets of lower supporting connecting rods are connected with fixed connecting rods; The fixed connecting rod is provided with a screw hole, and a rotating handle and an extension rod are connected in the screw hole; The rotating handle and one end of the extension rod can be rotatably connected to the sliding connecting rod; The sliding connecting rod is driven to move by rotating the handle and the extension rod; Wheels are also arranged on the lower supporting link.

10. A hydraulically driven drilling and jetting fire extinguishing method for an electric vehicle chassis, characterized in that: Use the electric vehicle chassis hydraulically driven drilling and jetting fire extinguishing device as described in any one of claims 1 to 9, move the fire extinguishing device under the vehicle chassis, introduce fire water, and complete the fire extinguishing operation.

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