Multifunctional fire extinguishing vehicle

Abstract

The utility model provides a multifunctional fire extinguishing vehicle which can quickly move to be close to a fire source, accurately eject high-speed airflow to the fire source and sweep the root of the fire source through the high-speed airflow, so that the fire source is cooled and extinguished quickly. The fire extinguishing device comprises a chassis which is provided with a power mechanism and can walk, and a fire extinguishing unit is arranged above the chassis; the fire extinguishing unit comprises a fan, a fire extinguishing cylinder, a horizontal swinging device and an up-down swinging device; a shell of the fan is connected with the chassis through a horizontal swing device, and the horizontal swing device drives the fan to swing relative to the chassis on the horizontal plane. The rear end of the fire extinguishing cylinder is communicated with an air outlet pipe of the fan, the fire extinguishing cylinder is connected with the air outlet pipe through an up-down swinging device, and the up-down swinging device drives the air outlet pipe to swing up and down relative to the air outlet pipe; the fan works, generated high-speed airflow is blown out through the air outlet pipe and the fire extinguishing cylinder, meanwhile, the horizontal swing device and the up-down swing device work, and the front end of the fire extinguishing cylinder achieves horizontal sweeping and up-down sweeping on a fire source.

Description

Technical Field

[0001] The utility model relates to the technical field of forest fire extinguishers, in particular to a multifunctional fire extinguisher for extinguishing forest and grass fires. Background Art

[0002] For forest fire fighting, backpack fire extinguishers are more common, which need to be carried by people and the operator needs to be close to the fire source to perform fire fighting operations. The personal danger is extremely high, and the person's load capacity is limited. The fire extinguisher is light in weight, has low power, and has poor fire fighting effect. Summary of the Invention

[0003] The utility model provides a multifunctional fire extinguisher, which can quickly move close to the fire source, accurately spray high-speed airflow to the fire source, and can sweep the fire source, especially the root of the fire source, with the high-speed airflow to achieve extremely fast cooling and fire extinguishing of the fire source, while being able to operate for a long time.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the utility model is:

[0005] The multifunctional fire-fighting vehicle comprises a chassis with a power mechanism and capable of traveling, and a fire-fighting unit is arranged above the chassis;

[0006] The fire extinguishing unit includes a fan, a fire extinguisher, a horizontal swing device, and an up-and-down swing device. The fan housing is connected to the chassis by the horizontal swing device, which drives the fan to swing horizontally relative to the chassis. The rear end of the fire extinguisher is connected to the air outlet pipe of the fan, and the fire extinguisher and the air outlet pipe are connected by the up-and-down swing device, which drives the air outlet pipe to swing up and down relative to the air outlet pipe.

[0007] The fan works and generates a high-speed airflow that is blown out through the air outlet pipe and the fire extinguisher. At the same time, the horizontal swing device and the up and down swing device work, and the front end of the fire extinguisher sweeps the fire source horizontally and up and down to cool the fire source and extinguish the fire.

[0008] In the above-mentioned multifunctional fire-extinguishing vehicle, the outer casing of the fan is arranged on the chassis to rotate around a vertical axis, and the horizontal swing device includes a crank seat, a horizontal swing power device that drives the crank seat to rotate around the crank seat axis, and a connecting rod with both ends hinged to the crank seat and the outer casing respectively; the horizontal swing power device drives the crank seat to rotate, and drives the fan, air outlet pipe, and upper and lower swing devices including the outer casing to swing around the vertical axis through the connecting rod.

[0009] The above-mentioned multifunctional fire-fighting vehicle has a fan casing that is rotatable around a vertical axis and is arranged on the chassis, and the horizontal swing device includes a crank seat, a horizontal swing power device that drives the crank seat to rotate around the crank seat axis, a rocker seat, a connecting rod and a locking pin whose two ends are respectively hinged to the crank seat and the rocker seat; the rocker seat is rotatable around the vertical axis and is arranged on the chassis or the shell; a pluggable locking pin is provided between the rocker seat and the shell, and when the locking pin is simultaneously inserted into the pin holes opened on the rocker seat and the shell, the rocker seat and the shell cannot rotate relative to each other around the vertical axis; when the locking pin is only inserted into the pin holes opened on the rocker seat or the shell, the rocker seat and the shell can rotate relative to each other around the vertical axis; when the locking pin is simultaneously inserted into the pin holes opened on the rocker seat and the shell, the rocker seat and the shell can rotate relative to each other around the vertical axis. When the locking pin is simultaneously inserted into the pin holes opened on the rocker seat and the shell, the horizontal swing power device drives the crank seat to rotate, and the rocker seat, the fan including the shell, the air outlet pipe, and the up and down swing device are driven to swing around the vertical axis through the connecting rod.

[0010] The multifunctional fire-fighting vehicle has one pin hole on the rocker seat and multiple pin holes on the shell, which are distributed on the circumference of the shell with the vertical axis as the center.

[0011] The above-mentioned multifunctional fire extinguisher has a pin shaft passing through the pipe wall of the air outlet pipe close to the fire extinguisher and is rotatably set on the pipe wall of the air outlet pipe; the pipe wall at the rear end of the air outlet pipe is fixed on the pin shaft; the second rocker seat is fixed to one end of the pin shaft; the up and down swinging device includes a second crank seat, an up and down swinging power device that drives the second crank seat to rotate around the axis of the second crank seat, and a second connecting rod whose two ends are respectively hinged to the second crank seat and the second rocker seat; the up and down swinging power device drives the second crank seat to rotate, and drives the second rocker seat, the pin shaft, and the fire extinguisher to swing around the axis of the pin shaft through the second connecting rod.

[0012] When the locking bolt is tightened, the up-and-down swinging power device drives the crank seat second to rotate, and drives the rocker seat second, locking block, pin shaft and fire extinguisher to swing around the pin shaft axis through the connecting rod second.

[0013] The multifunctional fire extinguisher described above comprises a fire extinguishing tube comprising a coaxial outer tube and an inner tube, wherein the inner tube is axially slidably arranged inside the outer tube; the tube wall at the rear end of the outer tube is fixed on a pin shaft; the two ends of the telescopic push rod located inside the inner tube, namely the fixed end and the movable end, are respectively connected to the pin shaft and the inner tube, and the telescopic push rod drives the inner tube to extend and retract relative to the outer tube.

[0014] The multifunctional fire extinguisher described above has a rectangular box at the front end of the air outlet pipe; the pin shaft passes through the two side walls of the rectangular box; the rear end of the outer pipe is a cylindrical tube passing through the front wall of the rectangular box, the cylindrical tube is coaxial with the pin shaft, and the two end plates of the cylindrical tube are in contact with the two side walls of the rectangular box; ventilation holes are opened on the rear wall of the rectangular box and the tube wall of the cylindrical tube facing the rear wall of the rectangular box.

[0015] The multifunctional fire truck includes a fire extinguishing agent tank located on a chassis and containing fire extinguishing agent, a nozzle located at the front end of the fire extinguisher, a liquid pump, and a fire extinguishing agent delivery pipe. The nozzle is connected to the liquid pump via the fire extinguishing agent delivery pipe, and the liquid pump is used to deliver the fire extinguishing agent in the fire extinguishing agent tank to the nozzle. The fire extinguishing agent is water.

[0016] The above-mentioned multifunctional fire-fighting vehicle is provided with a protective barrier bar in front of the chassis; the protective barrier bar extends forward; a micro switch is provided between the rear part of the protective barrier bar and the chassis; the micro switch is electrically connected to a controller for controlling the action of the multifunctional fire-fighting vehicle; when the chassis moves forward and the front end of the protective barrier bar hits an obstacle, the protective barrier bar is deformed by force, the micro switch is activated, and the chassis stops moving under the control of the controller.

[0017] The multifunctional fire-fighting vehicle is provided with a road obstacle clearing unit in front of the chassis.

[0018] The above-mentioned multifunctional fire-fighting vehicle, the road obstacle clearance unit includes a swing frame rotatably arranged in front of the chassis at the rear, an obstacle clearance roller rotatably arranged in front of the swing frame, cutting teeth fixed on the circumference of the obstacle clearance roller, a hydraulic motor that drives the obstacle clearance roller to rotate, and a hydraulic cylinder that drives the swing frame to swing up and down relative to the chassis.

[0019] The multifunctional fire-fighting vehicle further comprises a cover covering the upper portion of the obstacle removal roller, the rear end of the cover being hinged on the swing frame, and a push rod for driving the cover to swing relative to the swing frame being provided between the swing frame and the cover.

[0020] The multifunctional fire-fighting vehicle includes a remote controller for controlling the movement of the chassis, the operation of the fan, the horizontal swing of the fan, the up and down swing of the fire extinguisher, and the movement of the obstacle removal unit.

[0021] The beneficial effects of the utility model are:

[0022] The fan generates a high-speed airflow, which passes through the fire extinguisher and is directly sprayed to the root of the fire source, cooling the fire source, thereby achieving the effect of extinguishing the fire. The horizontal swing device can drive the fan as a whole, the fire extinguisher, the up and down swing device, etc. to swing horizontally, realizing horizontal sweeping of the fire source. The up and down swing device can drive the fire extinguisher to swing up and down relative to the fan outlet pipe, realizing up and down sweeping of the fire source. The chassis can be moved, and a crawler chassis belonging to the existing technology is preferably selected, which can adapt to rugged ground environments such as mountains and woodlands. The chassis drives the fan as a whole to move near the fire source, so that the high-speed airflow is directly sprayed to the root of the fire source, rapidly cooling the root of the fire source, and achieving the effect of extinguishing the fire.

[0023] The fire extinguisher consists of two layers of inner and outer tubes (outer tube and inner tube), and the inner tube can be extended by using a telescopic push rod, so that the front air outlet of the fire extinguisher (inner tube) is closer to the root of the fire source, further improving the fire extinguishing effect.

[0024] The extinguishing agent in the extinguishing agent tank is pumped through the extinguishing agent delivery pipe to the nozzle, located at the front air outlet of the fire extinguisher (the inner tube). The extinguishing agent sprayed from the nozzle is atomized by the high-speed airflow and sprayed toward the fire source, supplementing wind-driven firefighting, rapidly cooling the fire source and extinguishing the fire. The extinguishing agent can be water or other chemical agents. When water is used, the extinguishing vehicle is a water sprinkler. The extinguishing agent delivery pipe is preferably flexible to accommodate the expansion and contraction of the inner tube, the horizontal swing of the fan, and the vertical movement of the fire extinguisher.

[0025] The road-clearing unit, located at the front of the chassis, uses a hydraulic motor to drive the clearing rollers, which then rotate and cut through obstacles such as shrubs on the road ahead. A hydraulic cylinder drives the swing frame and clearing rollers up and down at the front of the vehicle, clearing and crushing tall trees. This allows the chassis to move smoothly while simultaneously isolating fire sources and preventing their spread. This fire-fighting vehicle is a versatile fire-fighting vehicle.

[0026] The obstacle removal roller is installed at the inner lower part of the protective cover. The cover as a whole or the front part of the cover is a movable cover. When encountering thick trees, a push rod (such as an electric push rod, etc.) can be used to drive the cover as a whole or the movable cover to swing upward and backward, and open the cover as a whole or the movable cover to prevent the front end of the cover or the movable cover from colliding with the obstacle, so that the cutting teeth on the obstacle removal roller can directly contact the obstacle and perform obstacle removal activities.

[0027] The forward-extending guardrail, when a tall tree strikes the front end of the guardrail, slightly springs back, triggering a microswitch (safety switch) and triggering the vehicle's stop function. The chassis stops, allowing the road clearance unit to operate. A controller electrically connected to the chassis' power mechanism, vertical swing mechanism, horizontal swing mechanism, and road clearance unit controls the vehicle's operation. This controller is currently available.

[0028] The remote controller belonging to the prior art can remotely control the fire truck, so that the operator can remotely control the fire truck to perform their respective operations without having to approach the fire source. The remote controller can wirelessly communicate with the controller to control the multi-function fire truck through the controller.

[0029] To drive the fan's horizontal swing, the fan housing can be directly hinged to one end of the connecting rod in the horizontal swing mechanism. However, in this case, the fan cannot rotate freely 360° relative to the chassis and can only swing back and forth horizontally within a small angle relative to the chassis, driven by the horizontal swing mechanism. This limits the fan's operating range. To this end, a horizontal swing mechanism, including a rocker seat and a locking pin, is added. The ends of the connecting rod are hinged to the crank seat and the rocker seat, respectively. In this way, when the locking pin is inserted into the pin holes in the rocker seat and the housing simultaneously, the horizontal swing power device drives the crank seat to rotate, and through the connecting rod, the rocker seat, fan, air outlet duct, and vertical swing mechanism to swing back and forth horizontally within a small angle around the vertical axis. When the locking pin is inserted only into the pin holes in the rocker seat or the housing, the entire fan can rotate 360° around the vertical axis. This unrestricted horizontal rotation of the fan enhances flexibility during firefighting operations and ease of operation when not extinguishing a fire.

[0030] To drive the fire extinguisher to swing up and down, the rocker base 2 in the swing mechanism can be directly fixed to the pin, with the ends of the connecting rod 2 hinged to the crank base 2 and the rocker base 2, respectively. However, in this case, the fire extinguisher can only swing back and forth within a small angle relative to the fan driven by the swing mechanism, which limits the fire extinguisher's operating range. To this end, a swing mechanism comprising a locking block and a locking bolt is employed. The rocker base 2 is pivoted about the pin axis and is mounted at one end of the pin. The locking block is fixed to the pin axis, and the rocker base 2 is provided with an arcuate slot centered on the pin axis. Thus, when the locking bolt is tightened, the swing mechanism drives the crank base 2 to rotate, which, through the connecting rod 2, drives the rocker base 2 and the locking block to swing up and down at a small angle about the pin axis. Consequently, the fire extinguisher, which is fixed to the pin, swings up and down at a small angle about the pin axis. When the locking bolt is loosened, the rocker base 2 can rotate relative to the locking block about the pin axis, allowing the pin, the locking block, and the fire extinguisher to rotate about the pin axis at a large angle, the large angle being the central angle of the arcuate slot. Of course, if the locking bolt is removed from the locking block (so that the locking bolt does not pass through the arc slot), the pin, locking block, and fire extinguisher can rotate around the pin over a wider range of angles. This allows the fire extinguisher to swing up and down with virtually no restrictions, providing greater flexibility when extinguishing a fire and greater convenience when not extinguishing a fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the main view of a multi-functional fire-fighting combat vehicle.

[0032] Figure 2 This is a top-down schematic diagram of a multi-functional firefighting combat vehicle.

[0033] Figure 3 This is a schematic diagram showing the connection between the fan and the chassis.

[0034] Figure 4 for Figure 3 A top view of the crank seat, rocker seat, connecting rod, locking pin, etc.

[0035] Figure 5 This is a schematic diagram of the connection between the fire extinguisher and the fan.

[0036] Figure 6 for Figure 5 Schematic top view of .

[0037] Figure 7 This is a schematic diagram of the inner tube extending out of the outer tube and the fire extinguisher swinging downward.

[0038] Figure 8 Schematic diagram of the inner tube extending out of the outer tube.

[0039] In the figure, the crawler chassis 100, the fire extinguishing unit 200, and the road obstacle clearing unit 500;

[0040] Fan 1, fire extinguisher 2, horizontal swing device 3, up and down swing device 4;

[0041] Housing 11, bearings or steel balls 13, vertical axis 12, air outlet pipe 14, rectangular box 15;

[0042] Outer tube 21, inner tube 22, cylindrical tube 23, telescopic push rod 24;

[0043] Crank base 31, horizontal swing power device 32, rocker base 33, connecting rod 34, locking pin 35, pin hole 36;

[0044] Pin 40, crank base 2 41, up and down swing power device 42, rocker base 2 43, connecting rod 2 44, locking bolt 45, arc groove 46, locking block 48;

[0045] Pivot 51, swing frame 52, obstacle removal roller 53, cutting teeth 54, hydraulic cylinder 55, cover 56, push rod 57;

[0046] Protective barrier 81, micro switch 82;

[0047] Fire extinguishing agent tank 91 , nozzle 92 , and fire extinguishing agent delivery pipe 93 . DETAILED DESCRIPTION

[0048] The specific embodiments of the present invention are further described below with reference to the accompanying drawings: Example 1

[0049] The multifunctional firefighting combat vehicle comprises a crawler chassis 100 with a power mechanism and capable of walking, a fire extinguishing unit 200 and a fire extinguishing agent tank are arranged above the chassis, and a road obstacle clearing unit 500 is arranged in front of the chassis.

[0050] The fire extinguishing unit includes a fan 1, a fire extinguisher 2, a horizontal swing device 3, and an up and down swing device 4.

[0051] The lower part of the fan housing 11 is rotatably mounted on the chassis around a vertical axis 12 via bearings or steel balls 13 .

[0052] The horizontal swing mechanism 3 includes a crank base 31, a motor 32 (the horizontal swing power unit) that drives the crank base 31 to rotate about its axis, a rocker base 33, a connecting rod 34 hinged at both ends to the crank base 31 and the rocker base 33, and a locking pin 35. The rocker base 33 is pivotally mounted on the chassis or housing 11 (shown in the figure as pivotally mounted on the lower periphery of the housing 11) about the vertical axis 12 via bearings or steel balls. A removable locking pin 35 is positioned between the rocker base and the housing. When the locking pin is inserted into pin holes 36 in both the rocker base and the housing, the rocker base 33 and the housing 11 cannot rotate relative to each other about the vertical axis. When the locking pin 35 is removed, or when the locking pin 35 is inserted only into the pin holes in the rocker base 33 or the housing 11, the rocker base and the housing can rotate relative to each other about the vertical axis. There is only one pin hole in the rocker base 33. Multiple pin holes 36 are located on the housing 11, distributed around its circumference, centered on the vertical axis. The pin holes 36 on the rocker base 33 and the housing 11 are located in the same plane, perpendicular to the vertical axis 12. When the locking pin is simultaneously inserted into a pin hole on the rocker base and any pin hole on the housing, the horizontal swinging power unit rotates the crank base, which, through the connecting rod, drives the rocker base, the fan, the exhaust duct, and the vertical swing mechanism, including the housing, to swing horizontally about the vertical axis.

[0053] The fire extinguishing pipe 2 comprises a coaxial outer tube 21 and inner tube 22, with the inner tube axially slidingly disposed within the outer tube. The front end of the fan 1's outlet duct 14 is a rectangular box 15. A pin 40 passes through the two side walls of the box and is pivotally mounted on the two sides via bearings. The rear end of the outer tube 21 communicates with a cylindrical tube 23 that passes through the front wall of the box. The cylindrical tube 23 is coaxial with the pin 40, and its two end plates are fixed to the pin 40 and in sealing contact with the two side walls of the box. A telescopic push rod (e.g., an electric push rod) 24, located within the inner tube, has its fixed and movable ends connected to the pin and the inner tube, respectively. The telescopic push rod drives the inner tube to extend and retract relative to the outer tube.

[0054] There are vents on the rear wall of the rectangular box and the wall of the cylindrical tube facing the rear wall of the rectangular box. The high-speed airflow generated by the fan 1 enters the fire extinguisher through the outlet pipe 14, the vents on the rear wall of the rectangular box, and the vents on the cylindrical tube, and then is ejected from the front end of the inner tube.

[0055] A second rocker base 43 is mounted at one end of the pin 40, pivoting about the pin axis. A locking block 48 is fixed to the same end. Rocker base 43 is formed with an arcuate slot 46 centered on the pin axis, through which a locking bolt 45 passes and is threadedly connected to the locking block 48. When the locking bolt 45 is tightened, rocker base 43 cannot rotate about the pin axis relative to the locking block 48. When the locking bolt 45 is loosened, rocker base 43 can rotate about the pin axis relative to the locking block, though the maximum rotation angle is limited by the central angle of the arcuate slot. When the locking bolt is removed, the rotation angle of the locking block and the pin relative to rocker base 4 is no longer limited by the central angle of the arcuate slot, allowing for a greater rotation angle. The vertical swing mechanism 4 includes a second crank base 41, a vertical swinging power device (e.g., a motor) 42 that drives crank base 41 about its axis, a second connecting rod 44 hinged at both ends to crank base 41 and rocker base 43, respectively, a locking bolt 45, and a locking block 48. When the locking bolt is tightened, the up and down swinging power device drives the crank seat 2 to rotate, and drives the rocker seat 2 43, locking block 48, pin 40, outer tube 21, inner tube 22, cylindrical tube 23, telescopic push rod 24, etc. to swing up and down relative to the rectangular box 15 around the pin axis through the connecting rod 2.

[0056] The fire extinguisher also includes a fire extinguishing agent tank 91 located on the chassis, containing fire extinguishing agent; a nozzle 92 located at the air outlet at the front end of the fire extinguisher's inner tube 22; a liquid pump; and a fire extinguishing agent delivery pipe 93. The nozzle is connected to the liquid pump via the fire extinguishing agent delivery pipe, and the liquid pump is used to deliver the fire extinguishing agent in the fire extinguishing agent tank to the nozzle. There are two fire extinguishing agent tanks 91, located above the chassis, on either side of the fan. The fire extinguishing agent is water.

[0057] A road obstacle clearing unit 500 and a protective barrier bar 81 are provided in front of the chassis.

[0058] The road obstacle removal unit 500 includes a swing frame 52 pivotally mounted in front of the chassis via a pivot 51, a road obstacle removal roller 53 pivotally mounted in front of the swing frame, cutting teeth 54 spirally arranged around the outer circumference of the road obstacle removal roller, a hydraulic motor fixed to the swing frame that drives the road obstacle removal roller, and a hydraulic cylinder 55 that drives the swing frame to swing up and down relative to the chassis about the pivot 51. A cover 56 covers the upper portion of the road obstacle removal roller, with the rear end of the cover hinged to the swing frame. A push rod (e.g., an electric push rod) 57 is disposed between the swing frame and the cover to drive the cover to swing relative to the swing frame.

[0059] A protective bar 81 extends forward above the obstacle-clearing unit. A microswitch 82 is located between the rear of the bar and the chassis. This microswitch is electrically connected to a controller that controls the movement of the multifunctional firefighting vehicle. When the chassis moves forward and the front end of the protective bar hits a large obstacle, the bar deforms under force, triggering the microswitch and halting the chassis under control of the controller.

[0060] The remote controller communicates with the controller, and can remotely control the movement of the chassis, the operation of the fan, the horizontal swing of the fan, the up and down swing of the fire extinguisher, and the movement of the hydraulic motor, hydraulic cylinder, push rod and other components that drive the clearing roller.

[0061] The fan works and generates a high-speed airflow that is blown out through the air outlet pipe and the fire extinguisher. At the same time, the horizontal swing device and the up and down swing device work, and the front end of the fire extinguisher sweeps the fire source horizontally and up and down, rapidly cooling the fire source to extinguish the fire. Example 2

[0062] The main difference between Example 2 and Example 1 is that the rocker base 33 and lock pin 35 in Example 1 are removed, and the other end of the connecting rod 34 is directly hinged to the housing 11. In this case, the horizontal swing device 3 includes a crank base 31, a horizontal swing power device 32 that drives the crank base to rotate about the crank base axis, and a connecting rod 34 with its ends hinged to the crank base and the housing. The horizontal swing power device drives the crank base to rotate, and through the connecting rod, it drives the fan, fire extinguisher, vertical swing device, etc., including the housing, to swing horizontally about the vertical axis. Example 3

[0063] The main difference between Example 3 and Example 1 is that the locking block 48 and locking bolt 45 in Example 1 are removed, and the second rocker base 43 is directly fixed to the pin 40. In this case, the vertical swing device 4 includes the second crank base 41, a vertical swing power device 42 that drives the second crank base to rotate about the second crank base axis, and a second connecting rod 44 with its ends hinged to the second crank base and the second rocker base. The vertical swing power device drives the second crank base to rotate, and through the second connecting rod, the second rocker base, the pin, and the fire extinguisher to swing up and down about the pin axis.

[0064] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention is based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field fall within the protection scope of the present invention.

Claims

1. A multifunctional fire-fighting vehicle, comprising a chassis with a power mechanism and capable of traveling, characterized in that: A fire extinguishing unit is provided above the chassis; The fire extinguishing unit includes a fan, a fire extinguisher, a horizontal swing device, and an up-and-down swing device. The fan housing is connected to the chassis by the horizontal swing device, which drives the fan to swing horizontally relative to the chassis. The rear end of the fire extinguisher is connected to the air outlet pipe of the fan, and the fire extinguisher and the air outlet pipe are connected by the up-and-down swing device, which drives the air outlet pipe to swing up and down relative to the air outlet pipe. The fan works and generates a high-speed airflow that is blown out through the air outlet pipe and the fire extinguisher. At the same time, the horizontal swing device and the up and down swing device work, and the front end of the fire extinguisher sweeps the fire source horizontally and up and down to cool the fire source and extinguish the fire.

2. The multifunctional fire-fighting vehicle according to claim 1, characterized in that: The fan casing is arranged on the chassis and rotates around a vertical axis. The horizontal swing device includes a crank seat, a horizontal swing power device that drives the crank seat to rotate around the crank seat axis, and a connecting rod with both ends hinged to the crank seat and the casing respectively; the horizontal swing power device drives the crank seat to rotate, and drives the fan including the casing, the air outlet pipe, and the up and down swing device to swing around the vertical axis through the connecting rod.

3. The multifunctional fire-fighting vehicle according to claim 1, characterized in that: The fan casing is arranged on the chassis and rotates around a vertical axis. The horizontal swing device includes a crank seat, a horizontal swing power device that drives the crank seat to rotate around the crank seat axis, a rocker seat, a connecting rod and a locking pin whose two ends are respectively hinged to the crank seat and the rocker seat; the rocker seat is rotatable on the chassis or the casing with the vertical axis as the axis; a pluggable locking pin is provided between the rocker seat and the casing, and when the locking pin is inserted into the pin holes opened on the rocker seat and the casing at the same time, the rocker seat and the casing cannot rotate relative to each other around the vertical axis; when the locking pin is only inserted into the pin holes opened on the rocker seat or the casing, the rocker seat and the casing can rotate relative to each other around the vertical axis; when the locking pin is inserted into the pin holes opened on the rocker seat and the casing at the same time, the horizontal swing power device drives the crank seat to rotate, and drives the rocker seat, the fan including the casing, the air outlet pipe, and the up and down swing device to swing around the vertical axis through the connecting rod.

4. The multifunctional fire-fighting vehicle according to claim 3, characterized in that: There is one pin hole on the rocker seat, and there are multiple pin holes on the shell, which are distributed on the circumference of the shell with the vertical axis as the center.

5. The multifunctional fire-fighting vehicle according to claim 1, characterized in that: The pin shaft passes through the pipe wall of the air outlet pipe close to the fire extinguisher and is rotatably set on the pipe wall of the air outlet pipe; the pipe wall at the rear end of the air outlet pipe is fixed on the pin shaft; the rocker seat 2 is fixed to one end of the pin shaft; the up and down swinging device includes a crank seat 2, an up and down swinging power device that drives the crank seat 2 to rotate around the axis of the crank seat 2, and a connecting rod 2 whose two ends are respectively hinged to the crank seat 2 and the rocker seat 2; the up and down swinging power device drives the crank seat 2 to rotate, and drives the rocker seat 2, the pin shaft, and the fire extinguisher to swing around the axis of the pin shaft through the connecting rod 2.

6. The multifunctional fire-fighting vehicle according to claim 1, characterized in that: When the locking bolt is tightened, the up and down swinging power device drives the crank seat second to rotate, and drives the rocker seat second, locking block, pin shaft and fire extinguisher to swing around the pin shaft axis through the connecting rod second.

7. The multifunctional fire-fighting vehicle according to claim 5 or 6, characterized in that: The fire extinguishing pipe includes a coaxial outer pipe and an inner pipe, and the inner pipe is axially slidably arranged inside the outer pipe; the pipe wall at the rear end of the outer pipe is fixed on the pin shaft; the two ends of the telescopic push rod located in the inner pipe, namely the fixed end and the movable end, are connected to the pin shaft and the inner pipe respectively, and the telescopic push rod drives the inner pipe to extend and retract relative to the outer pipe.

8. The multifunctional fire-fighting vehicle according to claim 5 or 6, characterized in that: The front end of the air outlet duct is a rectangular box in the shape of a cuboid; the pin shaft passes through the two side walls of the rectangular box; the rear end of the outer tube is a cylindrical tube passing through the front wall of the rectangular box, the cylindrical tube is coaxial with the pin shaft, and the two end plates of the cylindrical tube are in contact with the two side walls of the rectangular box; there are vents on the rear wall of the rectangular box and the tube wall of the cylindrical tube facing the rear wall of the rectangular box.

9. The multifunctional fire-fighting vehicle according to claim 5 or 6, characterized in that: It also includes a fire extinguishing agent tank located on the chassis with fire extinguishing agent inside, a nozzle located at the front end of the fire extinguisher, a liquid pump, and a fire extinguishing agent delivery pipe. The nozzle is connected to the liquid pump through the fire extinguishing agent delivery pipe, and the liquid pump is used to deliver the fire extinguishing agent in the fire extinguishing agent tank to the nozzle.

10. The multifunctional fire-fighting vehicle according to claim 1, characterized in that: A protective barrier and a road obstacle clearing unit are provided in front of the chassis; the protective barrier extends forward; a micro switch is provided between the rear of the protective barrier and the chassis; the micro switch is electrically connected to a controller for controlling the operation of the multifunctional fire-fighting vehicle; when the chassis moves forward and the front end of the protective barrier hits an obstacle, the protective barrier is deformed by force, the micro switch is activated, and the chassis stops moving under the control of the controller; The road obstacle removal unit includes a swing frame that is rotatably arranged in front of the chassis at the rear, a obstacle removal roller that is rotatably arranged in front of the swing frame, cutting teeth fixed on the circumference of the obstacle removal roller, a hydraulic motor that drives the obstacle removal roller to rotate, and a hydraulic cylinder that drives the swing frame to swing up and down relative to the chassis.

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