Fire extinguishing device for drilling battery protection plate by using fire-fighting water driven drill bit

Abstract

This utility model relates to a fire extinguishing device that uses fire water to drive a drill bit to drill holes in a battery cover plate. It includes a bottom frame (1), a lifting mechanism (2), a working platform (3), a power assembly (4), and a hole opener (5). The power assembly (4) includes a shell (41), an outer cylinder (42), an inner cylinder (43), a lifting shaft (44), a seat ring (45), a cover plate (46), and blades (47). The outer and inner cylinders are coaxially arranged inside the shell. Both the outer and inner cylinders have through holes on their walls for fire water to pass through. The hollow lifting shaft is sleeved on the inner surface of the outer cylinder and the outer surface of the inner cylinder and can move up and down. The seat ring is sleeved on the upper outer surface of the outer cylinder, and the cover plate covers the upper surface of the seat ring. Multiple blades are evenly arranged on the outer circumferential surface of the outer cylinder. This utility model uses a fire water-driven power assembly to provide drilling power to the drill bit, eliminating the need for additional power during use. This makes the utility model widely applicable and highly stable.

Description

Technical Field

[0001] This utility model relates to the field of fire extinguishing for new energy vehicles, specifically a fire extinguishing device that uses fire-fighting water to drive a drill bit to drill holes in the battery protection plate. Its main function is to quickly open holes at the bottom of a burning new energy vehicle and continuously spray water into the battery inside the vehicle through the holes to quickly extinguish the fire and prevent reignition. Background Technology

[0002] With the increasing popularity of new energy vehicles, car fires are also increasing year by year. Lithium battery car fires are characterized by their suddenness, intense burning, rapid spread, and difficulty in firefighting, making it difficult to extinguish them quickly using traditional methods.

[0003] Conventional firefighting methods involve connecting fire hydrants and continuously spraying water onto the vehicle using hoses. However, since lithium batteries are located at the bottom of the car, most of the firefighting water flows from the car's surface to the ground, making it difficult to directly reach the batteries. Even with prolonged and large-volume spraying, extinguishing the fire remains challenging. Some engineers have proposed using nozzles that spray water upwards from under the car chassis. However, the chassis is protected by steel plates that prevent the lithium batteries from penetrating the plates, resulting in ineffective firefighting.

[0004] Chinese patent CN116943075A proposes a battery pack perforation and injection fire extinguishing device. This device uses a drill bit to drill holes in the bottom steel plate of an electric vehicle battery pack and inject a cooling, flame-retardant, and fire-extinguishing substance, enabling cooling and fire extinguishing inside the lithium battery. However, the technical solution involved in this patent requires a drill rig 11 to drive the drill bit 12. This solution requires a readily available power source for driving the drill rig, such as fuel or electricity. In situations where fuel or electricity is unavailable, the battery pack perforation and injection fire extinguishing device cannot complete the drilling task.

[0005] Based on this, this utility model is hereby proposed. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a fire extinguishing device that uses a fire-fighting water-driven drill bit to drill holes in the battery protection plate of a new energy vehicle whose battery is on fire. This device eliminates the need for a standby power source for the drill bit, thereby expanding the application range of fire extinguishing devices for new energy vehicles and ensuring the reliability of the fire extinguishing device.

[0007] The technical solution of this utility model is as follows: a fire extinguishing device that uses fire water to drive a drill bit to drill holes in a battery cover plate, including a bottom frame, a lifting mechanism, a working platform, a power component, and a hole opener. The lifting mechanism is set on the bottom frame, and the working platform is set on the lifting mechanism. The working platform and the power component are combined into a kit containing a hollow cavity. The side of the cavity is provided with a water inlet, and multiple blades that can be driven by fire water are provided inside the cavity. A hole opener that can rotate coaxially with the blades is provided on the top of the cavity. The power component includes a shell, an outer cylinder, an inner cylinder, a lifting shaft, a seat ring, a cover plate, and blades. The outer cylinder and the inner cylinder are coaxially set inside the shell. Both the outer cylinder and the inner cylinder have through holes for fire water to pass through. The hollow lifting shaft is sleeved on the inner surface of the outer cylinder and the outer surface of the inner cylinder and can move up and down. The seat ring is sleeved on the upper outer surface of the outer cylinder, and the cover plate covers the upper surface of the seat ring. Multiple blades are evenly arranged on the outer circumferential surface of the outer cylinder. During operation, fire water enters the cavity through the inlet and sprays out from the hollow hole opener. The fire water drives the power unit to rotate, thereby causing the hole opener to rotate and rise to quickly drill holes in the battery protection plate. The blades of the power unit can be driven by the fire water, and the outer and inner cylinders rotate synchronously. The fire water lifts the lifting shaft, thereby driving the hole opener, which is fixedly connected to the lifting shaft, to rotate and rise, completing the drilling operation.

[0008] Furthermore, the inner circumferential surface of the outer cylinder is inlaid with a liner, on which a guide groove is provided; a protrusion is provided in the middle of the outer circumference of the lifting shaft. Through the cooperation of the protrusion and the guide groove, the outer cylinder and the lifting shaft form a sliding connection that can slide up and down but cannot rotate relative to each other.

[0009] Furthermore, the seat ring has a structure similar to a ball bearing, with its inner ring interference-fitted to the outer circumference of the outer cylinder, and its outer ring fixed to the upper surface of the work platform by a cover plate. During operation, the inner ring and the outer cylinder rotate synchronously, while the outer ring remains stationary, allowing the outer cylinder connected to the inner ring to rotate smoothly.

[0010] Optionally, the side of the cavity is also provided with a pressure relief port, the closing of which is controlled by a gate device set on the working platform. The gate device includes a gate, a gate limiting mechanism and a compression spring. The gate is locked in the normally open position by the gate limiting mechanism. The gate limiting mechanism is linked with the hole opener. When the hole opener rises to a certain height, it generates a working force on the gate limiting mechanism, causing the gate limiting mechanism to disengage from the gate. The compression spring forces the gate to fall and close the pressure relief port.

[0011] Furthermore, the gate limiting mechanism is a lever mechanism set on the working platform. Its first end is provided with a locking post, which can wedge into the notch opened on the outer edge of the middle part of the gate plate to lock the gate plate, and can also disengage from the notch after being subjected to force. The second end of the lever mechanism extends to the vicinity of the hole opener, and when the hole opener rises to a certain height, the second end of the lever mechanism can contact the conical surface provided at the lower part of the hole opener. Under the action of the conical surface, the second end will be offset, thereby causing the locking post wedged into the notch to disengage and no longer lock the gate plate.

[0012] Optionally, a pressure relief port is provided on the side wall of the hole drill. When the hole drill is drilling into the battery guard plate but has not yet penetrated through it, fire-fighting water can flow out from the pressure relief port to prevent the hole drill from losing power if the fire-fighting water is blocked.

[0013] Optionally, the lifting mechanism includes a helical push rod, a movable connecting rod, and a cross arm. The helical push rod is threadedly connected to the bottom frame via a lead screw. One end of the helical push rod is hinged to the middle of the movable connecting rod, and the other end is used to connect to a rocker arm. The four ends of the cross arm are respectively hinged to the bottom frame and the working platform in pairs, and one of the four ends of the cross arm is hinged to the end of the movable connecting rod.

[0014] Optionally, the lifting mechanism includes a lever assembly, a movable link, and a cross arm. The lever assembly includes a lever bracket mounted on the bottom frame crossbar, an L-shaped lever, and a connecting push rod. The middle of the L-shaped lever is hinged to the lever bracket, one end of the L-shaped lever is hinged to one end of the connecting push rod, and the other end of the connecting push rod is fixedly connected to the middle of the movable link. The four ends of the cross arm are respectively hinged in pairs to the bottom frame and the working platform, and one of the four ends of the cross arm is hinged to the end of the movable link. By fitting an external long sleeve onto the free end of the L-shaped lever and pressing it downwards, the movable link can rotate and translate within the U-shaped guide groove of the bottom frame, thereby unfolding the cross arm and moving the working platform away from the bottom frame. Alternatively, by lifting the free end of the L-shaped lever in the opposite direction with the sleeve, the movable link can rotate and translate within the U-shaped guide groove of the bottom frame, thereby retracting the cross arm and bringing the working platform closer to the bottom frame. Due to the amplification characteristics of the lever mechanism, fitting an external long sleeve onto the free end of the L-shaped lever and pressing it downwards can quickly and easily raise the working platform.

[0015] Furthermore, multiple positioning columns are evenly arranged around the center of the hole opener on the working platform to position the hole opener under the electric vehicle battery cover during operation. The multiple positioning columns are of the same height, so that when the working platform is raised by the lifting mechanism, they can first form a working plane under the electric vehicle battery cover, which facilitates the hole opener to drill upwards perpendicular to this plane.

[0016] The beneficial effects of the above technical solution are as follows:

[0017] (1) This utility model uses a power component driven by fire water to provide drilling power to the drill bit. No additional power is required during use, which makes this utility model have a wide range of applications and high stability.

[0018] (2) The present invention uses a lifting shaft to provide drilling support for the hole opener, so that the hole opener can drill deep into the protective plate even when rotating rapidly.

[0019] (3) The present invention has a pressure relief port on the power component or the hole opener, which can provide an outlet channel for fire water and prevent the hole opener from losing power when drilling into the protective plate.

[0020] (4) This utility model uses a spiral push rod to lift the work platform. Since the screw of the spiral push rod has a self-locking characteristic, it can lift the work platform stably.

[0021] (5) This utility model uses a lever assembly to raise and lower the work platform. Due to the amplification characteristics of the lever mechanism, the external long sleeve is fitted onto the free end of the L-shaped lever and pressed downward, which can quickly and easily raise the work platform. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of one embodiment of the present invention, in which the lifting mechanism and the hole opener are at their highest positions.

[0023] Figure 2 for Figure 1 The illustrated embodiment shows a schematic diagram of the lifting mechanism and the opening device in their lowest position.

[0024] Figure 3 for Figure 1 The schematic diagram of the embodiment shown has some features removed, illustrating the positional relationship between the power unit, the opening, the inlet, and the pressure relief port.

[0025] Figure 4 yes Figure 1 The illustrated embodiment is a cross-sectional view of the structure after some features have been removed, mainly showing the internal structure of the power assembly.

[0026] Figure 5 This is a schematic diagram of another embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure after removing some components in one embodiment of the present invention, which mainly shows the positional relationship between the gate device and the working platform.

[0028] Figure 7 for Figure 6A cross-sectional view of the structure shown.

[0029] Figure 8 for Figure 6 The illustrated embodiment is a cross-sectional view after the power unit and the hole punch are installed.

[0030] The relevant reference numerals in the attached drawings are as follows: bottom frame 1, U-shaped guide groove 11, crossbar 12, longitudinal beam 13; lifting mechanism 2, spiral push rod 21, movable connecting rod 22, cross arm 23, lever assembly 24, lever bracket 241, L-shaped lever 242, connecting push rod 243, pin 244, rocker arm 25; working platform 3; power assembly 4, outer shell 41, outer cylinder 42, inner liner 421, guide groove 422, inner cylinder 43. Lifting shaft 44, protrusion 441, seat ring 45, inner ring 451, outer ring 452, cover plate 46, blade 47; hole opener 5, serration 51, conical surface 52; water inlet 6; pressure relief port 7; gate device 8, gate 81, gate plate 811, notch 8111, guide limit plate 812, gate limit mechanism 82, first end 821, locking post 8211, second end 822, compression spring 83, positioning column 9. Detailed Implementation

[0031] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this utility model, but should not be used to limit the scope of this utility model. That is, this utility model is not limited to the described preferred embodiments, and the scope of this utility model is defined by the claims.

[0032] The terms "first," "second," etc., used in the specification and claims are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or device that includes a series of steps or units, not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device; the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "first," "again," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or structural unit referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention; the terms "fixed," "connected," and "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two structural units. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0033] like Figure 1-4 As shown, one embodiment of this utility model provides a fire extinguishing device that uses fire water to drive a drill bit to drill holes in a battery cover. It includes a bottom frame 1, a lifting mechanism 2, a working platform 3, a power component 4, and a hole opener 5. The lifting mechanism 2 is mounted on the bottom frame 1, and the working platform 3 is mounted on the lifting mechanism 2. The working platform 3 and the power component 4 are combined to form a kit containing a hollow cavity. A water inlet 6 is provided on the side of the cavity, and multiple blades 47 that can be driven by fire water are provided inside the cavity. A hole opener 5 that can rotate coaxially with the blades 47 is provided on the top of the cavity.

[0034] The hole opener 5 involved in this utility model is a hollow drill bit, which includes saw teeth 51 for cutting and a tapered surface 52 can be provided at its lower part. This hollow drill bit allows liquid to flow out from inside the drill bit when drilling.

[0035] The bottom frame 1 is a square frame, including two parallel crossbars 12 and two parallel longitudinal beams 13. A U-shaped guide groove 11 is provided on the longitudinal beams 13 to provide lateral movement space for the components of the lifting mechanism 2.

[0036] The lifting mechanism 2 includes a spiral push rod 21, a movable connecting rod 22, and a cross arm 23. The spiral push rod 21 has an internal hexagonal nut at one end and a lead screw in the middle. The spiral push rod 21 is threadedly connected to the crossbar 12 of the bottom frame 1 through the lead screw. One end of the spiral push rod 21 is hinged to the middle of the movable connecting rod 22, and the other end with the internal hexagonal nut is used to connect to the rocker arm 25. The cross arm 23 is formed by hinged in the middle of two support arms. The cross arm 23 has four ends. One of the two lower ends is hinged to the rear of the longitudinal beam 13, and the other is hinged to the side wall of the U-shaped guide groove 11 and hinged to the end of the movable connecting rod 22, so that the end and the end of the movable connecting rod 22 can move back and forth along the side wall of the U-shaped guide groove 11. One of the two upper ends is hinged to the rear of the working platform 3, and the other is hinged to the front of the working platform 3. The front of the working platform 3 is also provided with a U-shaped guide groove.

[0037] Rotating the helical push rod 21 by the rocker arm 25 allows the movable connecting rod 22 to translate within the U-shaped guide groove 11 of the bottom frame 1, thereby unfolding the cross arm 23 and moving the work platform 3 away from the bottom frame 1. Alternatively, rotating the helical push rod 21 in the opposite direction by the rocker arm 25 allows the movable connecting rod 22 to translate within the U-shaped guide groove 11 of the bottom frame 1, thereby retracting the cross arm 23 and bringing the work platform 3 closer to the bottom frame 1. Because the screw of the helical push rod has a self-locking characteristic, it can stably raise and lower the work platform, eliminating concerns about sudden descent during drilling.

[0038] In an alternative embodiment, such as Figure 5 As shown, the lifting mechanism 2 includes a lever assembly 24, a movable link 22, and a cross arm 23. The lever assembly 24 includes a lever bracket 241, an L-shaped lever 242, and a connecting push rod 243, all mounted on the crossbar 12 of the bottom frame 1. The middle part of the L-shaped lever 242 is hinged to the lever bracket 241, one end of the L-shaped lever 242 is hinged to one end of the connecting push rod 243, and the other end of the connecting push rod 243 is connected to the middle part of the movable link 22. The four ends of the cross arm 23 are respectively hinged to the bottom frame 1 and the working platform 3 in pairs, and one of the four ends of the cross arm 23 is hinged to the end of the movable link 22. By attaching an external long sleeve (not shown) to the free end of the L-shaped lever 242 and pressing it downwards, the movable connecting rod 22 can be translated within the U-shaped guide groove 11 of the bottom frame 1, thereby unfolding the cross arm 23 and moving the work platform 3 away from the bottom frame 1. Alternatively, by lifting the free end of the L-shaped lever 242 in the opposite direction with the long sleeve, the movable connecting rod 22 can be translated within the U-shaped guide groove 11 of the bottom frame 1, thereby retracting the cross arm 23 and bringing the work platform 3 closer to the bottom frame 1. Due to the amplification characteristics of the lever mechanism, attaching the external long sleeve to the free end of the L-shaped lever and pressing it downwards can quickly and easily raise the work platform.

[0039] like Figure 3 and Figure 4 As shown, the power assembly 4 includes a housing 41, an outer cylinder 42, an inner cylinder 43, a lifting shaft 44, a seat ring 45, a cover plate 46, and a blade 47. The outer cylinder 42 and the inner cylinder 43 are coaxially arranged. One end of the inner cylinder 43 is rotatably connected, for example, to the housing 41 via a ball bearing, so that the inner cylinder 43 can rotate the outer cylinder 42 around a common axis. Both the outer cylinder 42 and the inner cylinder 43 have through holes for fire water to pass through.

[0040] The inner surface of the hollow lifting shaft 44 is fitted onto the inner cylinder 43, allowing the lifting shaft 44 to slide up and down relative to the inner cylinder 43 in the direction of rotation. The lifting shaft 44 has a flange on its outer surface, and a protrusion 441 is provided on the flange. This protrusion is embedded in a guide groove 422 provided on the inner surface of the outer cylinder 42, allowing the lifting shaft 44 to also slide up and down relative to the outer cylinder 42 in the direction of rotation. The lifting shaft 44 can only slide up and down relative to the outer cylinder 42 and the inner cylinder 43, and cannot rotate relative to either the outer cylinder 42 or the inner cylinder 43.

[0041] In this invention, the position of the through hole on the outer cylinder 42 wall is lower than the position of the through hole on the inner cylinder 43 wall in the axial direction. The advantage of this arrangement is that the pressure of the fire water can be used to provide a continuous upward support force to the hole opener 5. As long as fire water is sprayed out from the hole opener 5, this support force will always exist.

[0042] When the lifting shaft 44 is in its initial state (i.e., the fire water has not entered the outer cylinder 42), the inner wall of the outer cylinder 42, the bottom wall of the outer cylinder 42, the outer wall of the inner cylinder 43, and the lower surface of the flange of the lifting shaft 44 form a nearly closed space. This space is only connected to the outside of the outer cylinder 42 by the through hole on the cylinder wall (at this time, the through hole on the cylinder wall of the inner cylinder 43 is blocked by the lower part of the cylinder body of the lifting shaft 44, and the inside of the inner cylinder 43 is not connected to the inside of the outer cylinder 42). When the lifting shaft 44 is lifted to a certain height by the fire water, the through hole on the inner cylinder 43, which was originally blocked by the lower part of the cylinder body of the lifting shaft 44, is no longer blocked, and the fire water can enter the inside of the inner cylinder 43 through the through hole, and thus can be sprayed out from the opening device 5.

[0043] A seat ring 45 is fitted onto the upper outer surface of the outer cylinder 42, and a cover plate 46 covers the upper surface of the seat ring 45. Multiple blades 47 are evenly distributed on the outer circumferential surface of the outer cylinder 42. An inner lining 421 is inlaid on the inner circumferential surface of the outer cylinder 42, and a guide groove 422 is provided thereon.

[0044] The seat ring 45 has a structure similar to a ball bearing. Its inner ring 451 is interference-fitted with the outer circumferential surface of the outer cylinder 42, and its outer ring 452 is fixed to the upper surface of the working platform 3 by the cover plate 46.

[0045] When the battery guard plate is thick and the cutting teeth of the hole opener 5 are small, the hole opener 5 may lose power because the fire water cannot be sprayed out after drilling into the guard plate. It is possible to open a pressure relief port 7 on the outer shell 41 of the power component 4, or to open multiple pressure relief ports 7 evenly at the bottom of the hole opener 5. This can solve the problem that the hole opener 5 cannot be driven to drill in after the fire water is blocked.

[0046] like Figure 6-8 As shown, in a preferred embodiment, the pressure relief port 7 is located on the outer casing 41, and its closure is controlled by a gate device 8 disposed on the working platform 3. The gate device 8 includes a gate 81 passing through the upper and lower surfaces of the working platform 3, a gate limiting mechanism 82, and compression springs 83. The gate 81 includes a gate plate 811 and a guide limiting plate 812. The guide limiting plate 812 is disposed inside the outer casing 41, located on the left and right sides of the pressure relief port 7, and is used to guide the raising and lowering of the gate plate 811. Multiple compression springs 83 are disposed against the lower surface of the working platform 3, with one end of each compression spring 83 abutting against the lower surface of the working platform 3 and the other end abutting against the gate plate 811, causing the gate plate 811 to tend to slide downwards to close the pressure relief port 7.

[0047] The gate limiting mechanism 82 is a lever mechanism set on the working platform 3. Its first end 821 is provided with a locking post 8211, which can wedge into the notch 8111 opened on the outer edge of the middle part of the gate plate 811, and can also disengage from the notch 8111 after being subjected to force. The second end 822 of the lever mechanism extends to the vicinity of the opening device 5, and when the opening device 5 rises to a certain height, the second end 822 of the lever mechanism can contact the tapered surface 52 provided at the lower part of the opening device 5. Under the action of the tapered surface 52, the second end 822 will be offset, thereby causing the locking post 8211 wedged into the notch 8111 to disengage and no longer lock the gate plate 811.

[0048] In the initial state, the gate and pressure relief port 7 of the fire extinguishing device with the gate device 8 are normally open. After the fire water enters the housing 41 of the power component 4, it can flow out from the opening 5 or through the pressure relief port 7. When the opening 5 is pushed up to a certain height by the fire water, the conical surface 52 of the opening 5 presses against the second end 822 of the gate limiting mechanism 82, causing the second end 822 to deflect. This causes the locking post 8211 locked in the notch 8111 of the gate plate 811 to disengage. The gate plate 811, which is freed from the restriction of the locking post 8211, descends under the elastic force of the compression spring 83, blocking the pressure relief port 7. At this time, all the fire water can only be sprayed out from the opening of the opening 5.

[0049] Using a gate device 8 to close the pressure relief port 7 has a greater advantage than simply opening multiple pressure relief ports 7 in the middle of the hole opener 5 to prevent the hole opener 5 from losing power. The former uses a gate limiting mechanism 82 linked to the hole opener 5, which ensures that the pressure relief port 7 is closed after the fire extinguishing device drills through the battery protection plate, and all the fire water can be used for fire extinguishing and cooling the battery. In contrast, the pressure relief port 7 in the latter is always open, and even after drilling through the battery protection plate, the fire water flowing out of the pressure relief port 7 is difficult to use for fire extinguishing and cooling the battery, resulting in waste of fire water and reduced fire extinguishing efficiency.

[0050] The typical working process of this fire extinguishing device, which uses a fire-fighting water-driven drill bit to drill holes in a battery protection plate, is as follows.

[0051] In the event of a fire involving an electric vehicle battery, connect the inlet 6 of the fire extinguishing device of this invention to a fire hose, push the fire extinguishing device under the chassis where the electric vehicle battery is located, and use the rocker arm 25 or an external long sleeve to drive the lifting mechanism 2 to raise the work platform 3 until the positioning column 9 contacts the chassis. Open the fire hydrant connected to the fire hose to inject fire water into the power component 4. The fire water impacts the blades 47, causing the outer cylinder 42 and inner cylinder 43 to rotate synchronously, and the opening device 5 also rotates accordingly. The fire water flows through the passage on the outer cylinder 42... The hole enters the space between the outer cylinder 42 and the inner cylinder 43, pushing the lifting shaft 44 and the hole opener 5 to rise; fire water enters the inner cylinder 43 through the through hole on the inner cylinder wall and flows out from the top of the hole opener 5; when the serrations 51 of the hole opener 5 contact the battery protection plate, it drills a hole in the battery protection plate; fire water continuously enters the power assembly 4 from the inlet 6, and the blades 47 continuously drive the outer cylinder 42 and the inner cylinder 43 to rotate, so that the hole opener 5 continuously drills a hole in the battery protection plate until the battery protection plate is drilled through, and the fire water enters the battery to extinguish the fire and cool it down.

[0052] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A fire extinguishing device for drilling holes in a battery cover using a fire-fighting water-driven drill bit, comprising a bottom frame (1), a lifting mechanism (2), a working platform (3), a power assembly (4), and a hole opener (5), wherein the lifting mechanism (2) is mounted on the bottom frame (1), the working platform (3) is mounted on the lifting mechanism (2), the working platform (3) and the power assembly (4) are combined to form a kit containing a hollow cavity, wherein a water inlet (6) is provided on the side of the cavity, and multiple blades (47) that can be driven by fire-fighting water are provided inside the cavity, and a hole opener (5) that can rotate coaxially with the blades (47) is provided on the top of the cavity; characterized in that, The power assembly (4) includes a housing (41), an outer cylinder (42), an inner cylinder (43), a lifting shaft (44), a seat ring (45), a cover plate (46), and blades (47). The outer cylinder (42) and the inner cylinder (43) are coaxially arranged inside the housing (41). Both the outer cylinder (42) and the inner cylinder (43) have through holes for fire water to pass through. The hollow lifting shaft (44) is sleeved on the inner surface of the outer cylinder (42) and the outer surface of the inner cylinder (43) and can move up and down. The seat ring (45) is sleeved on the upper outer surface of the outer cylinder (42). The cover plate (46) covers the upper surface of the seat ring (45). Multiple blades (47) are evenly arranged on the outer circumferential surface of the outer cylinder (42).

2. The fire extinguishing device as described in claim 1, characterized in that, The inner circumferential surface of the outer cylinder (42) is inlaid with an inner lining (421), on which a guide groove (422) is provided; the middle of the outer circumference of the lifting shaft (44) is provided with a protrusion (441) that cooperates with the guide groove (422).

3. The fire extinguishing device as described in claim 1, characterized in that, The seat ring (45) has a structure similar to a ball bearing, with its inner ring (451) being interference-fitted to the outer circumferential surface of the outer cylinder (42), and its outer ring (452) being fixed to the upper surface of the work platform (3) by the cover plate (46).

4. The fire extinguishing device as described in claim 1, characterized in that, The cavity is also provided with a pressure relief port (7) on its side. Its closure is controlled by a gate device (8) set on the working platform (3). The gate device (8) includes a gate (81), a gate limiting mechanism (82) and a compression spring (83). The gate (81) is locked in the normally open position by the gate limiting mechanism (82). The gate limiting mechanism (82) is linked with the hole opener (5). When the hole opener (5) rises to a certain height, it generates a working force on the gate limiting mechanism (82), causing the gate limiting mechanism (82) to disengage from the gate (81). The compression spring (83) forces the gate (81) to fall and close the pressure relief port (7).

5. The fire extinguishing device as described in claim 4, characterized in that, The gate limiting mechanism (82) is a lever mechanism set on the working platform (3). Its first end (821) is provided with a locking post (8211), which can wedge into the notch (8111) opened on the outer edge of the middle part of the gate plate (811) of the gate (81) to lock the gate plate (811), and can also disengage from the notch (8111) after being subjected to force. The second end (822) of the lever mechanism extends to the vicinity of the hole opener (5), and when the hole opener (5) rises to a certain height, the second end (822) of the lever mechanism can contact the tapered surface (52) set at the lower part of the hole opener (5). Under the action of the tapered surface (52), the second end (822) will be deflected, thereby causing the locking post (8211) wedged into the notch (8111) to disengage and no longer lock the gate plate (811).

6. The fire extinguishing device as described in claim 1, characterized in that, A pressure relief port (7) is provided on the side wall of the opening device (5).

7. The fire extinguishing device as described in claim 1, characterized in that, The lifting mechanism (2) includes a spiral push rod (21), a movable connecting rod (22), and a cross arm (23). The spiral push rod (21) is threadedly connected to the bottom frame (1) via a lead screw. One end of the spiral push rod (21) is hinged to the middle of the movable connecting rod (22), and the other end is used to connect to the rocker arm (25). The four ends of the cross arm (23) are respectively hinged to the bottom frame (1) and the working platform (3) in pairs. One of the four ends of the cross arm (23) is hinged to the end of the movable connecting rod (22).

8. The fire extinguishing device as described in claim 1, characterized in that, The lifting mechanism (2) includes a lever assembly (24), a movable link (22), and a cross arm (23). The lever assembly (24) includes a lever bracket (241), an L-shaped lever (242), and a connecting push rod (243) mounted on the crossbar (12) of the bottom frame (1). The middle part of the L-shaped lever (242) is hinged to the lever bracket (241), one end of the L-shaped lever (242) is hinged to one end of the connecting push rod (243), and the other end of the connecting push rod (243) is fixedly connected to the middle part of the movable link (22). The four ends of the cross arm (23) are respectively hinged to the bottom frame (1) and the working platform (3), and one of the four ends of the cross arm (23) is hinged to the end of the movable link (22).

9. The fire extinguishing device according to any one of claims 1-8, characterized in that, Multiple positioning columns (9) are evenly arranged around the center of the hole opener (5) on the working platform (3) to position the hole opener (5) under the electric vehicle battery guard plate during operation.

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