Fire extinguishing device for lithium batteries

Abstract

This invention relates to the field of lithium battery fire extinguishing, and more particularly to a fire extinguishing device for lithium batteries. The device includes a placement unit for holding the lithium batteries, with a protective cover vertically sliding above each placement unit. Multiple spraying units are symmetrically arranged above the placement units and within the protective covers. Through the coordinated operation of the spraying units and the protective covers, after a fire sensor detects a fire, the drive system first moves the roller support plate, causing the protective cover to fall freely and cover the fire area, achieving rapid physical isolation of the fire source. This effectively prevents the fire from spreading to surrounding batteries when the lithium battery catches fire or explodes, significantly improving fire extinguishing safety. Through the linkage design of the locking mechanism and the gear adjusting block, after the protective cover falls, the push head moves the gear adjusting block back to its original position, which in turn drives the adjusting tube to deflect and swing via the drive shaft, enabling the spraying head to spray dynamically at multiple angles. The extinguishing agent can fully cover the fire source area, greatly improving fire extinguishing efficiency.

Description

Technical Field

[0001] This invention relates to the field of lithium battery fire extinguishing technology, and in particular to a fire extinguishing device for lithium batteries. Background Technology

[0002] Currently, lithium batteries are prone to overheating, thermal runaway, and even fire and explosion during storage due to their active chemical properties. Existing lithium battery fire extinguishing devices mostly use fixed nozzles or handheld fire extinguishers. Fixed nozzles have a single spray angle and cannot be dynamically adjusted according to the location of the fire source, resulting in a limited coverage area of ​​the extinguishing agent. This makes it difficult to effectively suppress the chain thermal runaway reaction that occurs when lithium batteries catch fire. Furthermore, there is a lack of effective physical isolation and protection measures around lithium batteries. Once a lithium battery explodes, it is very easy to spread to surrounding batteries, causing the fire to expand. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fire extinguishing device for lithium batteries.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A fire extinguishing device for lithium batteries includes a placement unit for placing lithium batteries. Each placement unit is vertically and slidably fitted with a protective cover for protection. Multiple spraying units are symmetrically arranged above the placement unit and inside the protective cover. The spraying units are installed on the ceiling surface of the room where the lithium batteries are stored. The spraying units deliver liquid to extinguish the fire through the fire extinguishing unit. The spraying unit includes a delivery pipe connected to the fire extinguishing unit. The delivery pipe achieves multi-angle fire extinguishing spraying from the lower spray head through an adjustable pipe that rotates at the bottom. The adjustable pipe is rotated through bevel gear boxes and bearing boxes on both sides. A drive shaft rotates vertically inside the bevel gear box. The drive shaft is displaced through a drive system on the upper mounting bracket in conjunction with a gear adjusting block. The drive system drives the piston rod at the output end of the servo cylinder to move the push head. The push head, together with the locking block, drives the roller support plate to move synchronously. After the roller support plate moves to a specified position, the protective cover placed on its surface can fall freely. The bottom of the push head is equipped with a locking mechanism for pushing the gear adjusting block to move.

[0005] In addition, a preferred structure is that the placement unit includes a placement plate set on the ground, guide rods are vertically arranged on both sides of the placement plate, a protective cover is set on the guide rods and moves vertically, a bevel gear box is connected to the top side of the guide rod, a slide rod seat is set at the top of the guide rod, and a roller support plate is slidably fitted on the slide rod seat; The roller support plate has sliding heads on both sides that are slidably engaged with the slide rods of the slide rod seat. A pull rod is provided in the middle of the upper surface of the roller support plate. A first slot for installing the locking block is provided at the top of the pull rod. A support plate for abutting the locking block is provided on one side of the slide rod seat and below the first slot.

[0006] In addition, a preferred structure is that sliding plates are symmetrically arranged on the inner wall surfaces of the protective cover near the guide rod, the sliding plates are slidably fitted on the guide rod, a support frame is provided above the sliding plates of the protective cover, a support roller is rotatably arranged on the support frame, the support roller is slidably fitted on the roller support plate, and a limiting insert is provided on one side of the support frame for locking the gear adjusting block.

[0007] In addition, a preferred structure is that the fire extinguishing unit includes a liquid storage tank installed on the ground, and a high-pressure delivery pump is installed on the top of the liquid storage tank. The high-pressure delivery pump delivers liquid to the delivery pipe through a water pipe installed on the ceiling. The conveying pipe has a second conveying chamber, and a spherical connector is provided at the bottom of the conveying pipe. The adjusting pipe rotates and fits at the spherical connector.

[0008] In addition, the preferred structure is that the top of the regulating pipe is provided with a rotating cavity, the ball connector is disposed in the rotating cavity and rotates, the center of the regulating pipe is provided with a first conveying cavity communicating with the second conveying cavity, the top outer wall of the regulating pipe is fixedly connected with a rotating shaft and a bevel gear rotating shaft respectively, the rotating shaft is rotatably fitted on the bearing of the bearing box, the bevel gear rotating shaft meshes with the drive shaft, and the bottom of the regulating pipe is connected with a spray head communicating with the first conveying cavity; The spray head is connected to the first conveying chamber through the connecting hole at the top. The inner cavity of the spray head is provided with multiple flow dividers, and the bottom of the spray head is provided with a through spray hole.

[0009] In addition, a preferred structure is that a bevel gear that meshes with the bevel gear shaft is provided in the middle of the drive shaft body, a gear disk is provided at the top of the drive shaft body and at the top of the bevel gear box, the gear disk meshes with the gear adjusting block, and a fire sensor is installed at the bottom of the outer wall on one side of the bevel gear box.

[0010] Furthermore, in a preferred configuration, the gear adjusting block has a toothed surface on the side wall near the drive shaft that meshes with the gear disk, and a sliding groove on the other side surface of the gear adjusting block away from the toothed surface. The sliding groove is used for sliding fit on the mounting bracket. A limiting block for locking by a locking mechanism is provided on the top of the gear adjusting block, and a limiting plate for locking by a limiting rod is fixedly connected to one side of the limiting block. A dustproof bracket is provided above the gear adjusting block.

[0011] In addition, a preferred structure is that the mounting bracket is fixed to the ceiling, the mounting bracket includes a mounting plate for mounting the servo cylinder, a guide plate for mounting the gear adjusting block and the dustproof bracket is fixedly connected to the bottom of the mounting plate, and multiple limit rods are provided on the side of the mounting plate near the locking mechanism; The guide plate has a slider for the displacement of the gear adjustment block on one side, and a guide groove is opened on one side of the slider. The dust cover slides in the guide groove. A limit hole is opened on the guide plate for installing a limit rod. The dustproof frame includes a guide block that slides into the guide groove, and a dustproof plate is horizontally arranged on the top of the guide block. The dustproof plate is positioned above the gear adjusting block.

[0012] In addition, a preferred structure is that a second slot for installing a locking block is provided at the end of the rod at the top of the push head, a sliding rod frame is provided at the bottom of the push head, the locking mechanism is slidably engaged on the sliding rod frame, and springs are provided on the sliding rods at the bottom of the sliding rod frame; The locking mechanism includes a sliding plate that slides on the slide bar frame, a spring for holding the sliding plate, and a vertically installed insert rod on the top of each sliding plate for inserting into the top hole of the limiting insert block. A lever plate is fixedly connected to the side of the sliding plate near the roller support plate. Limiting rollers are rotatably installed on the side walls of both sides of the sliding plate, and the limiting rollers are rotatably engaged with the limiting rod.

[0013] The beneficial effects of this invention are as follows: 1. By setting up the coordinated operation of the spray unit and the protective cover, after the fire sensor detects a fire, the drive system first drives the roller support plate to move, allowing the protective cover to fall freely and cover the fire area, achieving rapid physical isolation of the fire source, effectively preventing the fire and explosion of lithium batteries from affecting surrounding batteries, and significantly improving fire extinguishing safety.

[0014] 2. Through the linkage design of the locking mechanism and the gear adjusting block, after the protective cover is lowered, the push head drives the gear adjusting block to move back to the reset position, and then drives the adjusting tube to deflect and swing through the drive shaft, so that the spray head can achieve multi-angle dynamic spraying, and the extinguishing agent can fully cover the fire source area, greatly improving the fire extinguishing efficiency. Attached Figure Description

[0015] Figure 1 A schematic diagram showing the distribution of fire extinguishing equipment indoors where lithium batteries are stored; Figure 2 This is a schematic diagram of the overall structure of a single fire extinguishing unit; Figure 3 This is a structural diagram of a fire extinguishing unit; Figure 4 This is a schematic diagram of the structure after the protective cover and the placement unit have been separated. Figure 5 This is a schematic diagram of the overall structure of the spraying unit; Figure 6 A structural diagram showing the installation location of the fire sensor; Figure 7 This is a schematic diagram of the internal structure of a bevel gearbox; Figure 8 This is a schematic diagram of the drive shaft. Figure 9 This is a schematic diagram of the regulating pipe. Figure 10 This is a schematic diagram of the spray head structure; Figure 11 A structural diagram showing the installation location of the drive system; Figure 12 This is a structural diagram of the mounting bracket; Figure 13 This is a schematic diagram of the disassembled mounting bracket. Figure 14 This is a schematic diagram of the gear adjusting block. Figure 15 This is a schematic diagram of the drive system. Figure 16 This is a schematic diagram of the structure after the second slot and roller support plate are separated; Figure 17 This is a schematic diagram of the roller support plate. Figure 18 This is a schematic diagram of the protective shield.

[0016] In the diagram: 01, Placement unit; 011, Placement plate; 012, Guide rod; 0121, Slide rod seat; 0122, Support plate; 013, Roller support plate; 0131, Sliding head; 0132, Pull rod; 0133, First slot; 014, Locking block; 02, Fire extinguishing unit; 021, Liquid storage tank; 022, High-pressure delivery pump; 023, Water pipe; 03, Protective cover; 031, Sliding plate; 032, Support frame; 0321, Support roller; 0322, Limiting rod; 04, Spraying unit; 05, Fire sensor; 1, Adjusting pipe; 11, Rotating shaft; 12, Bevel gear rotating shaft; 13, Rotating cavity; 14, First conveying cavity; 2, Bevel gear box; 21, Drive shaft; 211, Bevel gear; 212, Gear disk; 3. Bearing housing; 4. Drive system; 41. Servo cylinder; 42. Push head; 421. Second slot; 422. Slide bar frame; 423. Spring; 43. Locking mechanism; 431. Slide plate; 432. Insert rod; 433. Pulley; 434. Limiting roller; 5. Conveying pipe; 51. Ball joint; 52. Second conveying chamber; 6. Spray head; 61. Connecting hole; 62. Diverter plate; 63. Spray hole; 7. Mounting bracket; 71. Mounting plate; 711. Limiting rod; 72. Guide plate; 721. Limiting insertion hole; 722. Slider; 723. Guide groove; 8. Gear adjusting block; 81. Gear tooth surface; 82. Slide groove; 83. Limiting insertion block; 84. Limiting insertion plate; 9. Dustproof bracket; 91. Dustproof plate; 92. Guide block. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figure 1-18 A fire extinguishing device for lithium batteries includes a placement unit 01 for placing lithium batteries. Each placement unit 01 is vertically and slidably fitted with a protective cover 03 for protection. Multiple spraying units 04 are symmetrically arranged above the placement unit 01 and inside the protective cover 03. The spraying units 04 are installed on the ceiling surface of the room where the lithium batteries are stored. The spraying units 04 deliver liquid for fire extinguishing through a fire extinguishing unit 02. The spraying unit 04 includes a delivery pipe 5 connected to the fire extinguishing unit 02. The delivery pipe 5 achieves multi-angle fire extinguishing spraying by the lower spray head 6 through an adjusting pipe 1 that rotates at the bottom. The adjusting pipe 1 is rotated through bevel gear boxes 2 and bearing boxes 3 on both sides. A drive shaft 21 rotates vertically inside the bevel gear box 2. The drive shaft 21 is displaced through a drive system 4 on the upper mounting bracket 7 in conjunction with a gear adjusting block 8.

[0019] Among them, the drive system 4 drives the piston rod at the output end of the servo cylinder 41 to drive the push head 42 to move. The push head 42, together with the locking block 014, drives the roller support plate 013 to move synchronously, so that the protective cover 03 placed on its surface can fall freely after the roller support plate 013 moves to a specified position. The bottom of the push head 42 is provided with a locking mechanism 43 for pushing the gear adjusting block 8 to move.

[0020] Furthermore, the placement unit 01 includes a placement plate 011 set on the ground, with guide rods 012 vertically arranged on both sides of the placement plate 011, and a protective cover 03 vertically movable on the guide rods 012. The top side of the guide rod 012 is connected to a bevel gear box 2, and a slide rod seat 0121 is set at the top of the guide rod 012. A roller support plate 013 is slidably fitted on the slide rod seat 0121, and the roller support plate 013 plays a supporting role.

[0021] In addition, the roller support plate 013 has sliding heads 0131 on both sides that are slidably engaged with the slide rods of the slide rod seat 0121. A pull rod 0132 is provided in the middle of the upper surface of the roller support plate 013. A first slot 0133 for installing the locking block 014 is provided at the top of the pull rod 0132. A support plate 0122 for abutting the locking block 014 is provided on one side of the slide rod seat 0121 and below the first slot 0133. The locking block 014 connects the pull rod 0132 and the push head 42.

[0022] Among them, the protective cover 03 has symmetrical sliding plates 031 on the inner wall surfaces of both sides near the guide rod 012. The sliding plates 031 are slidably engaged with the guide rod 012. The protective cover 03 is provided with a support frame 032 above the sliding plates 031. The support frame 032 is rotatably provided with a support roller 0321. The support roller 0321 is slidably engaged with the roller support plate 013. A limiting rod 0322 for locking the gear adjusting block 8 is provided on one side of the support frame 032. When the protective cover 03 is placed horizontally on the roller support plate 013, the limiting rod 0322 is inserted into the limiting hole 721 and the limiting plate 84 to prevent the gear adjusting block 8 from shifting.

[0023] Furthermore, the fire extinguishing unit 02 includes a liquid storage tank 021 installed on the ground. A high-pressure delivery pump 022 is installed on the top of the liquid storage tank 021. The high-pressure delivery pump 022 delivers liquid to the delivery pipe 5 through a water pipe 023 installed on the ceiling. A second delivery chamber 52 is opened in the delivery pipe 5. A ball joint 51 is installed at the bottom of the delivery pipe 5. The regulating pipe 1 is rotatably fitted at the ball joint 51. The ball joint 51 enables the regulating pipe 1 to deflect at a certain angle for multi-directional spraying.

[0024] Meanwhile, a rotating cavity 13 is provided at the top of the regulating pipe 1, and a spherical connector 51 is installed in the rotating cavity 13 for rotation. A first conveying cavity 14, which is connected to the second conveying cavity 52, is provided at the center of the regulating pipe 1. A rotating shaft 11 and a bevel gear rotating shaft 12 are fixedly connected to the two sides of the top outer wall of the regulating pipe 1, respectively. The rotating shaft 11 is rotatably fitted on the bearing of the bearing housing 3, and the bevel gear rotating shaft 12 meshes with the drive shaft 21. A spray head 6, which is connected to the bottom of the regulating pipe 1 and is connected to the first conveying cavity 14, is connected to the first conveying cavity 14 through the connecting hole 61 at the top. Multiple diverting plates 62 are provided in the inner cavity of the spray head 6, and a spray hole 63 is provided through the bottom of the spray head 6 to achieve diversion of the diverting plates 62.

[0025] Among them, a bevel gear 211 that meshes with the bevel gear shaft 12 is provided in the middle of the drive shaft 21, and a gear disk 212 is provided at the top of the drive shaft 21 and at the top of the bevel gear box 2. The gear disk 212 meshes with the gear adjusting block 8. A fire sensor 05 is installed at the bottom of the outer wall on one side of the bevel gear box 2. The fire sensor 05 is used to detect whether the lithium battery below is on fire.

[0026] Furthermore, the gear adjusting block 8 has a toothed surface 81 that meshes with the gear disk 212 on the side wall near the drive shaft 21, and a sliding groove 82 is provided on the other side surface of the gear adjusting block 8 away from the toothed surface 81. The sliding groove 82 is used to slide and fit on the mounting bracket 7. The top of the gear adjusting block 8 is provided with a limiting insert 83 for being locked by the locking mechanism 43. A limiting insert plate 84 for being locked by the limiting insert bar 0322 is fixedly connected to one side of the limiting insert 83. The dustproof bracket 9 is provided above the gear adjusting block 8 and serves to prevent dust.

[0027] In addition, the mounting bracket 7 is fixed to the ceiling. The mounting bracket 7 includes a mounting plate 71 for mounting the servo cylinder 41. The bottom of the mounting plate 71 is fixedly connected to a guide plate 72 for mounting the gear adjusting block 8 and the dustproof bracket 9. Multiple limit rods 711 are provided on the side of the mounting plate 71 near the locking mechanism 43.

[0028] The guide plate 72 has a slider 722 on one side for the displacement of the gear adjusting block 8. The slider 722 has a guide groove 723 on one side. The dustproof frame 9 is slidably fitted in the guide groove 723. The guide plate 72 has a limit hole 721 for installing a limit rod 0322. The dustproof frame 9 includes a guide block 92 slidably fitted in the guide groove 723. A dustproof plate 91 is horizontally installed on the top of the guide block 92. The dustproof plate 91 is positioned above the gear adjusting block 8.

[0029] Furthermore, a second slot 421 for installing the locking block 014 is provided at the top end of the rod of the push head 42, and a slide rod frame 422 is provided at the bottom of the push head 42. The locking mechanism 43 is slidably engaged on the slide rod frame 422, and springs 423 are provided on the slide rods at the bottom of the slide rod frame 422. The springs 423 play a reset function.

[0030] Meanwhile, the locking mechanism 43 includes a slide plate 431 that slides on the slide bar frame 422, a spring 423 that abuts against the slide plate 431, and a vertically arranged insert rod 432 on the top of each slide plate 431 for inserting into the top insertion hole of the limiting insert block 83. A lever plate 433 is fixedly connected to the side of the slide plate 431 near the roller support plate 013. Limiting rollers 434 are rotatably arranged on the side walls of both slide plates 431, and the limiting rollers 434 are rotatably engaged with the limiting rod 711.

[0031] In this embodiment, the placement plate 011 is set on the indoor floor to place multiple lithium batteries for charging. In daily use, if a lithium battery placed on the placement plate 011 catches fire, the fire sensor 05 at the top will provide real-time feedback, cut off the indoor power, and simultaneously activate the spray unit 04 above it. The servo cylinders 41 on both sides will extend, at which point the locking block 014 will be locked in the first slot 0133 and the second slot 421 on both sides and will be held in place by the bottom support plate 0122. The piston rod of the servo cylinder 41 will extend and drive the push head 42 to move, thereby pulling the pull rod 0132 on one side to move, causing the roller support plate 013 to move on the slide rod seat 0121. At this time, the locking mechanism 43 will not fall, and the limiting roller 434 will slide on the upper surface of the limiting rod 711.

[0032] As the push head 42 continues to extend, when the limiting roller 434 disengages from the limiting rod 711, the spring 423 releases its elastic potential energy, and the slide plate 431 descends on the slide rod frame 422, allowing the insertion rod 432 to descend and insert into the insertion hole of the limiting insertion block 83. This allows the locking mechanism 43 to connect with the gear adjusting block 8. The subsequent displacement of the push head 42 can drive the gear adjusting block 8 to move synchronously. At this time, as the push head 42 extends, the roller support plate 013 on one side moves away from the support roller 0321. As the support roller 0321 is pulled away from the roller support plate 013 below, without support below, the protective cover 03 falls freely, thus allowing the protective cover 03 to completely cover the burning placement plate 011.

[0033] At this time, the card block 014 is no longer held by the support plate 0122 and falls out of the first slot 0133 and the second slot 421, so that the subsequent displacement of the push head 42 no longer drives the pull rod 0132 to move synchronously. At this time, the piston rod of the servo cylinder 41 moves to extend and retract, thereby driving the gear adjusting block 8 to move back and forth. After the fire sensor 05 receives feedback, the high-pressure delivery pump 022 is started. The high-pressure delivery pump 022 outputs a large amount of water from the liquid storage tank 021 to the water pipe 023. The water is delivered from the second delivery chamber 52 to the first delivery chamber 14 and sprayed out in a dispersed manner from the spray hole 63. At this time, the gear adjusting block 8 moves, driving the gear disk 212 on one side to rotate back and forth, thereby causing the bottom bevel gear 211 to rotate synchronously, thereby causing the adjusting pipe 1 to swing, so that the water can be sprayed on the burning lithium battery below over a larger area. Through large-scale spraying, continuous cooling is achieved, the thermal runaway chain reaction is suppressed, and reignition is prevented.

[0034] During subsequent reset, align the insertion hole of the limit plate 84 with the limit insertion hole 721, then raise the protective cover 03 and place it back on the roller support plate 013, so that the limit insertion rod 0322 passes through the limit insertion hole 721 again and locks the limit plate 84.

[0035] Furthermore, after the protective cover 03 falls, it plays a protective role, preventing the explosion of the burning lithium battery from affecting the surrounding lithium batteries. The protective cover 03 is made of ceramicized silicone rubber.

[0036] In this invention, by setting up the coordinated operation of the spraying unit 04 and the protective cover 03, after the fire sensor 05 detects a fire, the drive system 4 first drives the roller support plate 013 to move, so that the protective cover 03 falls freely to cover the fire area, achieving rapid physical isolation of the fire source, effectively preventing the lithium battery from spreading to surrounding batteries when it catches fire and explodes, and significantly improving fire extinguishing safety. Through the linkage design of the locking mechanism 43 and the gear adjusting block 8, after the protective cover 03 falls, the push head 42 drives the gear adjusting block 8 to move back to the reset position, and then drives the adjusting tube 1 to deflect and swing through the drive shaft 21, so that the spraying head 6 can achieve multi-angle dynamic spraying, and the extinguishing agent can fully cover the fire source area, greatly improving the fire extinguishing efficiency.

[0037] The present invention achieves automatic switching of the function of the drive system 4 during fire extinguishing by using the cooperative design of the locking block 014 with the first slot 0133 and the second slot 421, and the limiting effect of the support plate 0122 on the locking block 014. First, the roller support plate 013 is pulled to make the protective cover 03 fall down. After the locking block 014 is dislodged, it switches to drive the gear adjusting block 8 to swing the spray head 6. The whole process does not require additional control components, and the structure is compact and the operation is reliable.

[0038] This invention achieves interlocking linkage of mechanical structures by setting a support roller 0321 on the protective cover 03 and slidingly engaging it with the roller support plate 013, and by inserting a limiting rod 0322 into the limiting hole 721 to lock the limiting plate 84 when the protective cover 03 falls. This ensures the stability of the protective cover 03 during daily hovering and can accurately trigger the unlocking of the gear adjusting block 8 when falling, thereby enhancing the reliability and response speed of the device.

[0039] The present invention utilizes the rotational engagement of the adjusting pipe 1 and the ball connector 51, as well as the double-sided support of the adjusting pipe 1 by the bevel gear box 2 and the bearing box 3, to ensure that the spray head 6 remains stable during the swinging process. The design of the spray hole 63 in conjunction with the diversion plate 62 ensures that the extinguishing agent is evenly dispersed, further improving the fire extinguishing coverage effect.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fire extinguishing device for lithium batteries, comprising a placement unit (01) for placing lithium batteries, characterized in that, Each of the placement units (01) is vertically slidably fitted with a protective cover (03) for protection. Multiple spraying units (04) are symmetrically arranged above the placement unit (01) and inside the protective cover (03). The spraying units (04) are installed on the indoor ceiling surface where the lithium batteries are stored. The spraying units (04) deliver liquid through the fire extinguishing unit (02) to extinguish the fire. The spraying unit (04) includes a delivery pipe (5) connected to the fire extinguishing unit (02). The delivery pipe (5) achieves multi-angle fire extinguishing by the lower spray head (6) through the adjusting pipe (1) which is rotatably set at the bottom. The adjusting pipe (1) is rotated by the bevel gear box (2) and bearing box (3) set on both sides. The bevel gear box (2) has a vertically rotating drive shaft (21) inside. The drive shaft (21) is displaced by the drive system (4) set on the upper mounting bracket (7) in conjunction with the gear adjusting block (8). The drive system (4) drives the piston rod at the output end of the servo cylinder (41) to move the push head (42) to a certain position. The push head (42) works with the locking block (014) to move the roller support plate (013) synchronously. After the roller support plate (013) moves to a specified position, the protective cover (03) placed on its surface can fall freely. The bottom of the push head (42) is provided with a locking mechanism (43) for pushing the gear adjusting block (8) to a certain position.

2. A fire extinguishing device for lithium batteries according to claim 1, characterized in that, The placement unit (01) includes a placement plate (011) set on the ground. Guide rods (012) are vertically arranged on both sides of the placement plate (011). A protective cover (03) is set on the guide rods (012) and moves vertically. The top side of the guide rod (012) is connected to a bevel gear box (2). A slide rod seat (0121) is set at the top of the guide rod (012). A roller support plate (013) is slidably fitted on the slide rod seat (0121). The roller support plate (013) has sliding heads (0131) on both sides that are slidably engaged with the slide rods of the slide rod seat (0121). A pull rod (0132) is provided in the middle of the upper surface of the roller support plate (013). A first slot (0133) for installing the locking block (014) is provided at the top of the pull rod (0132). A support plate (0122) for abutting the locking block (014) is provided on one side of the slide rod seat (0121) and below the first slot (0133).

3. A fire extinguishing device for lithium batteries according to claim 1, characterized in that, The protective cover (03) has sliding plates (031) symmetrically arranged on the inner wall surfaces of both sides near the guide rod (012). The sliding plates (031) are slidably fitted on the guide rod (012). The protective cover (03) has a support frame (032) above the sliding plates (031). The support frame (032) has a rotatable support roller (0321) slidably fitted on the roller support plate (013). The support frame (032) has a limiting rod (0322) for locking the gear adjusting block (8) on one side.

4. A fire extinguishing device for lithium batteries according to claim 1, characterized in that, The fire extinguishing unit (02) includes a liquid storage tank (021) installed on the ground. A high-pressure delivery pump (022) is installed on the top of the liquid storage tank (021). The high-pressure delivery pump (022) delivers liquid to the delivery pipe (5) through a water pipe (023) installed on the ceiling. The conveying pipe (5) has a second conveying chamber (52) inside, and a ball connector (51) is provided at the bottom of the conveying pipe (5). The adjusting pipe (1) is rotated and fitted at the ball connector (51).

5. A fire extinguishing device for lithium batteries according to claim 4, characterized in that, The top of the regulating pipe (1) is provided with a rotating cavity (13), and the ball connector (51) is set in the rotating cavity (13) for rotation. The center of the regulating pipe (1) is provided with a first conveying cavity (14) that communicates with the second conveying cavity (52). The top outer wall of the regulating pipe (1) is fixedly connected to a rotating shaft (11) and a bevel gear rotating shaft (12) respectively. The rotating shaft (11) is rotated and fitted on the bearing of the bearing box (3). The bevel gear rotating shaft (12) meshes with the drive shaft (21). The bottom of the regulating pipe (1) is connected to a spray head (6) that communicates with the first conveying cavity (14). The spray head (6) is connected to the first conveying chamber (14) through the connecting hole (61) at the top. The inner cavity of the spray head (6) is provided with multiple diverter plates (62), and the bottom of the spray head (6) is provided with a spray hole (63).

6. A fire extinguishing device for lithium batteries according to claim 5, characterized in that, The drive shaft (21) has a bevel gear (211) in the middle that meshes with the bevel gear shaft (12). A gear disk (212) is provided at the top of the drive shaft (21) and at the top of the bevel gear box (2). The gear disk (212) meshes with the gear adjusting block (8). A fire sensor (05) is installed at the bottom of the outer wall of one side of the bevel gear box (2).

7. A fire extinguishing device for lithium batteries according to claim 6, characterized in that, The gear adjusting block (8) has a tooth surface (81) that meshes with the gear disk (212) on the side wall near the drive shaft (21). The gear adjusting block (8) has a sliding groove (82) on the other side surface away from the tooth surface (81). The sliding groove (82) is used to slide on the mounting bracket (7). The top of the gear adjusting block (8) is provided with a limiting plug (83) for being locked by the locking mechanism (43). A limiting plate (84) for being locked by the limiting plug (0322) is fixedly connected to one side of the limiting plug (83). The dustproof bracket (9) is set above the gear adjusting block (8).

8. A fire extinguishing device for lithium batteries according to claim 7, characterized in that, The mounting bracket (7) is fixed on the ceiling. The mounting bracket (7) includes a mounting plate (71) for mounting the servo cylinder (41). The bottom of the mounting plate (71) is fixedly connected to a guide plate (72) for mounting the gear adjusting block (8) and the dustproof frame (9). The mounting plate (71) has multiple limit rods (711) on the side near the locking mechanism (43). The guide plate (72) is provided with a slider (722) for the displacement of the gear adjusting block (8) on one side. A guide groove (723) is provided on one side of the slider (722). The dustproof frame (9) is slidably fitted in the guide groove (723). A limit insertion hole (721) is provided on the guide plate (72). The limit insertion hole (721) is used to install the limit insertion rod (0322). The dustproof frame (9) includes a guide block (92) that slides in the guide groove (723), and a dustproof plate (91) is horizontally arranged on the top of the guide block (92), which is located above the gear adjusting block (8).

9. A fire extinguishing device for lithium batteries according to claim 1, characterized in that, The top rod end of the push head (42) is provided with a second slot (421) for installing the card block (014). The bottom of the push head (42) is provided with a slide rod frame (422). The locking mechanism (43) is slidably engaged on the slide rod frame (422). Springs (423) are provided on the slide rods at the bottom of the slide rod frame (422). The locking mechanism (43) includes a sliding plate (431) that slides on the slide bar frame (422), a spring (423) that abuts against the sliding plate (431), and a vertically arranged plug (432) on the top of the sliding plate (431) for inserting into the top hole of the limiting plug (83). A lever (433) is fixedly connected to the side of the sliding plate (431) near the roller support plate (013). Limiting rollers (434) are rotatably arranged on the side walls of the sliding plate (431) on both sides. The limiting rollers (434) are rotatably engaged with the limiting rod (711).

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