Fire monitor for multi-purpose fire fighting vehicle

Abstract

The utility model provides a kind of fire monitor for multifunctional fire extinguishing vehicle, its spray pipe can realize horizontal swing and up and down swing, so that the fire extinguishing agent of spray pipe is easy to aim at fire source, and spray pipe horizontal swing and up and down swing when resistance is small, simultaneously reliable sealing, simple structure, convenient to use, can also spray foam cover fire source, water-saving and fire extinguishing effect is very good, especially suitable for water shortage forest area use.It includes base, the cannon body that rotates in horizontal plane relative to base, the cannon body horizontal drive arrangement that drives cannon body relative to base horizontal rotation, the spray pipe that swings relative to cannon body in vertical plane, the spray pipe up and down swing device that drives spray pipe relative to cannon body up and down swing, the fire extinguishing agent passage that cannon body has, spray pipe and fire extinguishing agent passage outlet are communicated;Fire extinguishing agent passage inlet is communicated with fire extinguishing agent pumping device by pipeline, and fire extinguishing agent pumping device is used to pump fire extinguishing agent to fire monitor and spray out by spray pipe.

Description

Technical Field

[0001] This utility model relates to a fire cannon that sprays extinguishing agents, specifically a multi-functional fire truck fire cannon for extinguishing forest and grassland fires. Background Technology

[0002] Multi-functional fire trucks are useful for fighting forest fires because the dense vegetation in forest areas makes it very difficult to get close to the fire source, and the uneven terrain also makes it inconvenient for multi-functional fire trucks to move and turn.

[0003] In contrast, the nozzles of typical multi-functional fire trucks that spray extinguishing agents are mainly operated manually, making mechanized operation difficult and posing a high risk of danger.

[0004] Ensuring that the extinguishing agent is effectively sprayed towards the fire source is particularly important for forest fire fighting. Summary of the Invention

[0005] The purpose of this invention is to provide a fire monitor for a multi-functional fire truck, whose nozzle can swing horizontally and vertically, making it easy to aim the extinguishing agent sprayed from the nozzle at the fire source. The nozzle has low resistance when swinging horizontally and vertically, reliable sealing, simple structure, and is easy to use. It can also spray foam to cover the fire source, save water and has a good fire extinguishing effect, making it especially suitable for use in water-scarce forest areas.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A fire monitor for a multi-functional fire truck includes a base, a monitor body that rotates horizontally relative to the base, a horizontal drive device for the monitor body to rotate horizontally relative to the base, a nozzle that swings vertically relative to the monitor body, and a nozzle swinging device that swings the nozzle vertically relative to the monitor body. The monitor body has an extinguishing agent channel, and the nozzle is connected to the outlet of the extinguishing agent channel. The inlet of the extinguishing agent channel is connected to an extinguishing agent pumping device through a pipeline. The extinguishing agent pumping device is used to pump the extinguishing agent to the fire monitor and spray it out through the nozzle.

[0008] The aforementioned fire monitor also includes a compressed air pipe connected to a compressed air source. The outlet of the compressed air pipe is connected to a nozzle or extinguishing agent channel. When the extinguishing agent is an extinguishing agent containing a foaming agent, compressed air is intermittently pulsed into the nozzle or extinguishing agent channel through the compressed air pipe, causing the extinguishing agent to form foam and spray out of the nozzle.

[0009] The aforementioned fire monitor includes a fixedly connected vertical pipe and a horizontal pipe. The lower section of the vertical pipe rotates relative to the base around the axis of the vertical pipe. The horizontal pipe, which serves as a fire extinguishing agent channel, has an inlet for the fire extinguishing agent channel and an outlet for the fire extinguishing agent channel. The nozzle is a curved pipe. The nozzle inlet section is in circumferential sealing contact with the outlet section of the horizontal pipe. The nozzle inlet section rotates relative to the horizontal pipe around the axis of the outlet section of the horizontal pipe. The rotation of the nozzle inlet section around the axis of the outlet section of the horizontal pipe achieves the up-and-down swinging of the nozzle.

[0010] The aforementioned fire monitor has a nozzle inlet section rotatably mounted on the outer periphery of the nozzle via a bearing inside the horizontal pipe outlet section, and the nozzle inlet section is sealed to the inner periphery of the horizontal pipe outlet section via a sealing ring. The nozzle swinging device includes a worm gear two mounted on the outer periphery of the nozzle inlet section, a worm gear two rotatably mounted on the horizontal pipe outlet section in cooperation with the worm gear two, and a motor two that drives the worm gear two to rotate.

[0011] The aforementioned fire monitor has a compressed air channel on its base that communicates with a compressed air source. The lower section of the vertical pipe is rotatably mounted on the outer periphery of the compressed air channel outlet section via a bearing, and the outer periphery of the lower section of the vertical pipe is sealed to the inner periphery of the compressed air channel outlet section via a sealing ring. The horizontal drive device of the monitor includes a worm gear three mounted on the outer periphery of the lower section of the vertical pipe, a worm three rotatably mounted on the outlet section of the compressed air channel in cooperation with the worm gear three, and a motor three that drives the worm three to rotate. The compressed air channel communicates with the horizontal pipe through the vertical pipe. When the extinguishing agent is an extinguishing agent containing a foaming agent, compressed air is intermittently supplied to the extinguishing agent channel through the compressed air channel in a pulse manner, causing the extinguishing agent to form a foam and spray out of the nozzle.

[0012] The fire monitor described above uses a piston air compressor without an air tank as its compressed air source, and the air outlet of the piston air compressor's valve is directly connected to the compressed air pipe.

[0013] The aforementioned fire monitor has a flame detector installed on the nozzle. The horizontal drive device of the monitor body drives the monitor body to rotate horizontally back and forth, and the vertical swing device of the nozzle drives the nozzle to swing up and down back and forth. When the flame detector detects the flame, the horizontal drive device of the monitor body and the vertical swing device of the nozzle stop operating, and at this time the nozzle is aimed at the flame.

[0014] The aforementioned fire monitor also includes a drone, a flexible fire extinguishing agent extension pipe, and a spray gun. The spray gun mounted on the drone is detachably connected to the nozzle via the fire extinguishing agent extension pipe. The drone drives the spray gun close to the fire source to spray fire extinguishing agent to extinguish the fire.

[0015] The beneficial effects of this utility model are as follows:

[0016] The horizontal drive device of the nozzle body and the vertical swing device of the nozzle drive the nozzle to rotate horizontally and swing vertically, allowing the nozzle to be adjusted to different states to spray extinguishing agent at the fire source. The extinguishing agent can be water, foam, or extinguishing agent with added foaming agent, etc. When water is insufficient, foam extinguishing can be used first. Foam can be sprayed through the fire monitor (fire foam monitor or dual-purpose fire monitor) to cover the fire source, which saves water and has a very good fire extinguishing effect.

[0017] To make the fire monitor spray foam more effectively, or to spray different types of foam, compressed air can be intermittently pulsed into the nozzle via a compressed air pipe. The pulse frequency (the number of times compressed air is injected into the nozzle per unit time) can be controlled to produce different foam types. Since the compressed air generated by the up-and-down movement of the piston in a reciprocating air compressor is pulsed, the outlet of the reciprocating air compressor's valve can be directly connected to the compressed air pipe, resulting in a simpler structure and eliminating the need for a separate solenoid valve on the compressed air pipe to generate the pulsed airflow. This fire monitor features a large flow rate and long range.

[0018] The outer circumference of the nozzle inlet section is rotatably mounted inside the horizontal pipe outlet section via a bearing, and the outer circumference of the nozzle inlet section is sealed to the inner circumference of the horizontal pipe outlet section via a sealing ring, ensuring a sealed connection between the nozzle and the horizontal pipe, while the nozzle has low rotational resistance relative to the horizontal pipe.

[0019] The lower section of the vertical pipe is rotatably mounted in the outlet section of the compressed air channel via a bearing, and the lower section of the vertical pipe is sealed to the inner circumference of the outlet section of the compressed air channel via a sealing ring, ensuring a sealed connection between the vertical pipe and the compressed air channel. At the same time, the vertical pipe has low rotational resistance relative to the compressed air channel.

[0020] The flame detector can detect the fire source in a timely and accurate manner. After the flame detector detects the fire source, the horizontal drive device of the fire monitor and the vertical swing device of the nozzle stop operating, the nozzle is aimed at the flame, and then the fire monitor sprays extinguishing agent onto the flame to quickly extinguish the fire. Attached Figure Description

[0021] Figure 1 This is the overall main view of the multi-functional fire truck;

[0022] Figure 2 This is an overall top view of the multi-functional fire truck;

[0023] Figure 3 , Figure 4 It is a schematic diagram of the air outlet pipe swinging up and down to different states;

[0024] Figure 5 , Figure 6 This is a schematic diagram showing the air outlet duct swinging horizontally to different states;

[0025] Figure 7 , Figure 8 , Figure 9 These are the front view, top view, and side view of the tracked chassis.

[0026] Figure 10 yes Figure 8 AA section view in the middle;

[0027] Figure 11 This is a schematic diagram of a tracked chassis encountering an obstacle;

[0028] Figure 12 , Figure 13 , Figure 14 These are the front view, top view, and side view of the fire monitor.

[0029] Figure 15 , Figure 16 It is a schematic diagram of the nozzle swinging up and down to different states;

[0030] Figure 17 , Figure 18 This is a schematic diagram of the gun body swinging horizontally to different states;

[0031] In the diagram, the extinguishing agent pumping device 101 and the reciprocating air compressor 102 are shown.

[0032] Tracked chassis 200, chassis 201, frame 202, drive wheel 203, tension wheel 204, carrier roller 205, load-bearing roller 206, torsion bar 207, upper horizontal shaft 2071, lower horizontal shaft 2072, connecting rod 2073.

[0033] Angular wheel frame 208, front bar 2081, rear bar 2082, bearing housing 2083.

[0034] Reset device 209, damping shell 2091, elastic damping column 2092, damping wheel 2093, concave surface 2094

[0035] Road clearing unit 300, pivot 301, swing frame 302, hydraulic cylinder 305, cover 306, push rod 307.

[0036] Wind-powered fire suppression unit 400, fan 401, air outlet duct 4011, high-speed drive motor 4012, blades 4013, nozzles 4014.

[0037] Horizontal swing device 402, worm gear 4021, horizontal rotating frame 4022, support rod 4023.

[0038] Up-and-down swing device 403, electric push rod 4031.

[0039] 500 fire monitors

[0040] Base 501, compressed air passage 5011, transition interface section 5012,

[0041] Gun body 502, vertical tube 5021, horizontal tube 5022, bearing 5023, sealing ring 5024, extinguishing agent channel inlet 5025, transition section 5026.

[0042] 503 horizontal drive mechanism for the gun body, 5031 worm gear, 5032 worm, 504 nozzle, 505 nozzle vertical swing mechanism.

[0043] Surface sprinkler system 600, rear sprinkler head 601,

[0044] The drone firefighting unit 700, the fire extinguishing agent extension tube 701, the compressed air extension tube 702, and the spray gun 703;

[0045] Cab cooling device 800, front nozzle 801, cab 802. Detailed Implementation

[0046] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0047] Example:

[0048] See Figure 1 , 2 The multi-functional fire truck shown includes a tracked chassis 200 with a power mechanism and mobility. A road clearing unit 300 is located at the front of the chassis; a fire extinguishing unit is located on top of the chassis, including a wind-powered fire extinguishing unit 400, a fire monitor 500, and a ground spray system 600. A driver's cab 802 is located on top of the front of the chassis, and a cab cooling device 800 is located at the front of the cab. The wind-powered fire extinguishing unit 400 is mounted on a frame 202 fixed to the chassis 201, the fire monitor 500 is mounted above the driver's cab 802, and the ground spray system 600 is located at the rear of the chassis. This multi-functional fire truck is also equipped with a drone fire extinguishing unit 700.

[0049] The road clearing unit 300 includes a swing frame 302 rotatably mounted at the rear of the chassis via a pivot 301, a clearing roller rotatably mounted at the front of the swing frame, cutting teeth spirally arranged on the outer periphery of the clearing roller, a hydraulic motor fixed on the swing frame to drive the clearing roller to rotate, and a hydraulic cylinder 305 that drives the swing frame to swing up and down relative to the chassis around the pivot 301. A cover 306 covers the upper part of the clearing roller, and the rear end of the cover is hinged to the swing frame. A push rod (such as an electric push rod) 307 is provided between the swing frame and the cover to drive the cover to swing relative to the swing frame.

[0050] The wind-powered fire extinguishing unit 400 includes a fan 401, a horizontal swing device 402 that drives the fan to swing horizontally relative to the chassis, and an up-and-down swing device 403 that drives the fan to swing up and down relative to the chassis.

[0051] The fan is an axial flow fan. Inside the air outlet duct 4011 of the fan 401, there are blades 4013 that rotate around the axis of the air outlet duct under the drive of the fan power unit, i.e., the high-speed drive motor 4012. The rotating blades cause the airflow to enter from the rear end of the air outlet duct and be ejected from the front end. The nozzle 4014 is located at the front end of the air outlet duct.

[0052] See Figure 3-6 The horizontal swing device 402 includes a worm gear 4021 rotatably mounted on the frame, a worm wheel fixed on the horizontal rotating frame and cooperating with the worm gear, a horizontal swing power device that drives the worm gear to rotate, namely a worm gear drive motor, a horizontal rotating frame 4022 that rotates relative to the frame about the vertical axis, and a pair of support rods 4023 fixed on the horizontal rotating frame 4022.

[0053] The outer sides of the air outlet 4011 are hinged to the ends of two opposing support rods 4023 via a rotating shaft extending radially along the air outlet 4011.

[0054] The up-and-down swinging device 403 includes an electric push rod 4031, which includes a push rod seat, a push rod, etc. The push rod seat is hinged to a support rod 4023, and the end of the push rod, which can extend and retract relative to the push rod seat, is hinged to the air outlet duct 4011.

[0055] The up-and-down swinging device drives the air outlet to swing up and down around the rotating shaft. When the fan is working, the high-speed airflow generated is blown out through the fan's air outlet. At the same time, the horizontal swinging device and the up-and-down swinging device are working, and the high-speed airflow sweeps the fire source horizontally and vertically, cooling the fire source and extinguishing the fire.

[0056] An extinguishing agent tank containing an extinguishing agent (such as water) is located on the chassis. The inlet of an extinguishing agent pumping device (such as a water pump or other liquid pump) 101 extends into the extinguishing agent tank, and the outlet of the extinguishing agent pumping device is divided into five parallel branches. A nozzle 4014 located at the front end of the air outlet duct 4011 is connected to the first outlet branch of the extinguishing agent pumping device 101 via an extinguishing agent delivery pipe.

[0057] The extinguishing agent pumping device is used to deliver the extinguishing agent in the extinguishing agent tank to the nozzle through the first outlet branch; the extinguishing agent sprayed from the nozzle is atomized by the airflow and sprayed to the fire source with the airflow.

[0058] The cab cooling device 800 includes a front nozzle 801, etc. The cab 802 is located above the front of the chassis. The front nozzle 801, which sprays water or mist to cool the cab, is installed on the outside of the cab. The front nozzle 801 is connected to the second outlet branch of the fire extinguishing agent pumping device through a water delivery pipe. When the fire extinguishing agent in the fire extinguishing agent tank is water, the fire extinguishing agent pumping device pumps water to the front nozzle 801 through the second outlet branch, mainly for cooling the windshield and other parts of the cab.

[0059] See Figure 12-14 The fire monitor 500 is a dual-purpose fire monitor that can spray both water and foam. It includes a base 501 fixed to the top of the accelerator, a monitor body 502 that rotates in a horizontal plane relative to the base, a horizontal drive device 503 that drives the monitor body to rotate horizontally relative to the base, a nozzle 504 that swings in a vertical plane relative to the monitor body, and a nozzle swinging device 505 that drives the nozzle to swing up and down relative to the monitor body.

[0060] The gun body 502 includes a vertical tube 5021 and a horizontal tube 5022 fixedly connected. The base 501 has a compressed air passage 5011 communicating with a compressed air source, and the outlet of the compressed air passage 5011 is fixed to a transition interface section 5012 (which can be considered part of the compressed air passage 5011). The outer periphery of the lower section of the vertical tube 5021 is rotatably mounted within the transition interface section 5012 via a bearing 5023, and the outer periphery of the lower section of the vertical tube is sealed to the inner periphery of the transition interface section 5012 via a sealing ring 5024. The gun body horizontal drive device 503 includes a worm gear 5031 mounted on the outer periphery of the lower section of the vertical tube, a worm gear 5032 rotatably mounted on the transition interface section 5012 in cooperation with the worm gear, and a motor 5033 that drives the worm gear.

[0061] The horizontal pipe 5022, which serves as a fire extinguishing agent channel, has a fire extinguishing agent channel inlet 5025 on its pipe wall and a fixed transition section 5026 at the outlet of the horizontal pipe (which can be regarded as part of the horizontal pipe).

[0062] The nozzle 504 is a 90° bend. The outer circumference of the nozzle inlet section is rotatably mounted within the transition section 5026 via bearings, and the outer circumference of the nozzle inlet section is sealed to the inner circumference of the transition section 5026 via a sealing ring. The nozzle's vertical swinging device is similar to the gun body's horizontal drive device, including a worm gear two mounted on the outer circumference of the nozzle inlet section, a worm gear two rotatably mounted on the horizontal tube outlet section in cooperation with the worm gear two, and a motor two that drives the worm gear two to rotate. When the motor two is activated, the worm gear two rotates, causing the worm gear two and the nozzle inlet section to rotate around the axis of the horizontal tube outlet section, thus achieving the nozzle's vertical swinging.

[0063] The compressed air passage, vertical pipe, and horizontal pipe are connected in sequence. The extinguishing agent passage inlet 5025 is connected to the third outlet branch of the extinguishing agent pumping device via a pipeline. The extinguishing agent pumping device pumps the extinguishing agent in the extinguishing agent tank to the fire monitor and sprays it out through the nozzle through the third outlet branch. When the extinguishing agent contains a foaming agent, compressed air is pulsed into the extinguishing agent passage at intervals through the compressed air passage, causing the extinguishing agent to form a foam and be sprayed out of the nozzle.

[0064] The compressed air source is a piston air compressor 102 without an air tank. The air outlet of the piston air compressor valve is divided into two parallel branches. One air outlet branch is connected to the compressed air passage on the base, and the other air outlet branch is reserved and can be connected to one end of the compressed air extension pipe.

[0065] See Figure 1 , 2 The drone firefighting unit 700 includes a drone, a flexible extinguishing agent extension pipe 701, a flexible compressed air extension pipe 702, and a spray gun 703. The spray gun mounted on the drone has two parallel inlets. One inlet is detachably connected to the fourth outlet branch of the extinguishing agent pumping device via the extinguishing agent extension pipe, and the other inlet is detachably connected to the compressed air extension pipe. The drone propels the spray gun close to the fire source, spraying extinguishing agent to extinguish the fire. When the extinguishing agent contains a foaming agent, compressed air is intermittently pulsed into the spray gun via the compressed air extension pipe, causing the extinguishing agent to form a foamy spray that exits the spray gun.

[0066] The surface sprinkler system 600 includes multiple rear nozzles 601 located at the rear of the chassis. The rear nozzles are connected to the fifth outlet branch of the extinguishing agent pumping device via water delivery pipes. When the extinguishing agent in the extinguishing agent tank is water, the extinguishing agent pumping device pumps water to the rear nozzles 601 through the fifth outlet branch. This is mainly used to cool and extinguish the remaining fire at the rear of the chassis and prevent reignition.

[0067] See Figure 7-11 The tracked chassis 200 includes tracks, a frame 202, drive wheels 203 that rotate under the drive of a power unit mounted on the chassis to drive the tracks, tension wheels 204 mounted on the chassis to tension the tracks, support rollers 205 mounted on the upper side of the chassis to support the upper section of the tracks, load-bearing rollers 206 that contact the lower section of the tracks, a torsion bar 207, an angled wheel frame 208, and a reset device 209. The tracks, chassis, drive wheels, power unit, tension wheels, and support rollers are prior art and will not be described in detail.

[0068] The torsion bar 207 includes an upper horizontal shaft 2071, a lower horizontal shaft 2072, and a connecting rod 2073; the upper and lower horizontal shafts are parallel to each other, and the two ends of the connecting rod are fixedly connected to the upper and lower horizontal shafts respectively. The angular wheel frame 208 has a front rod 2081 and a rear rod 2082 fixedly connected at an angle, with an angle α between them, 60°≤α≤120°. Two pairs of load-bearing wheels are rotatably mounted on each angular wheel frame 208. The lower end of the front rod is fixed to the front axle, and the two front load-bearing wheels are rotatably mounted on the front axle. The lower end of the rear rod is fixed to the rear axle, and the two rear load-bearing wheels are rotatably mounted on the rear axle. The front axle, rear axle, upper horizontal shaft, and lower horizontal shaft are parallel to each other.

[0069] Each corner of the angular wheel frame 208 is rotatably connected to the lower horizontal shaft 2072 of a torsion bar via a bearing seat 2083. The upper horizontal shaft 2071 extends laterally along the chassis, passes through the damping shell 2091 fixed to the side of the chassis, and is hinged to the side of the chassis. The reset device 209 provided between the upper horizontal shaft 2071 of the torsion bar and the chassis 201 includes a square damping shell 2091, an elastic damping column 2092 located at the inner corner of the square damping shell, and a damping wheel 2093 fixed circumferentially to the upper horizontal shaft 2071. The damping wheel 2093 has four concave surfaces 2094 circumferentially, and each concave surface 2094 contacts the outer circumferential surface of an elastic damping column 2092.

[0070] See Figure 10 As shown, the torsion bar (or upper horizontal axis 2071) is in its initial position before any torque is applied. When a torque is applied to the torsion bar (or upper horizontal axis 2071) from this state, causing the upper horizontal axis 2071 to rotate clockwise around its axis, the damping wheel 2093 and the upper horizontal axis 2071 rotate clockwise together. The damping wheel 2093 causes the elastic damping column 2092 to elastically deform, turning it into an ellipse. The rotational resistance to the upper horizontal axis 2071 increases with the rotation angle. When no torque is applied to the torsion bar (or upper horizontal axis 2071), the elastic damping column 2092 returns to its original shape due to elasticity, and the torsion bar (or upper horizontal axis 2071) returns to its initial position.

[0071] Firefighting in forests and grasslands faces fundamental problems such as insufficient water supply and the inability to deliver large quantities of fire-fighting water in a timely manner, while the water tanks of fire trucks also have limited capacity. To effectively extinguish forest and grassland fires, this invention employs wind-powered fire suppression, utilizing a fan to generate a high-speed airflow that is sprayed onto the base of the fire source, cooling it and thus extinguishing the fire. This allows for continuous fire suppression, overcoming the problem of insufficient water supply leading to inability to continuously extinguish fires.

[0072] There are various types of horizontal swing devices that drive the fan to swing horizontally and vertical swing devices that drive the fan to swing up and down. The use of electric push rods and worm gear structures with simpler structures further simplifies the structure, making the horizontal and vertical swing of the fan faster, more convenient and flexible.

[0073] The axial flow fan provides a larger air volume and better fire suppression effect. A high-speed drive motor with a higher rotational speed drives the fan blades, generating a larger air volume with relatively low motor power consumption.

[0074] The extinguishing agent in the tank is pumped through a delivery pipe to nozzles located at the fan's outlet. The extinguishing agent sprayed from the nozzles is atomized by the high-speed airflow and propelled towards the fire source, assisting wind-powered fire suppression and achieving rapid cooling and extinguishing of the fire. The extinguishing agent can be water or other chemical agents. When the extinguishing agent is water, the fire truck is a water-based fire truck. Flexible pipes are preferred for the extinguishing agent delivery pipe to accommodate the horizontal and vertical oscillations of the fan.

[0075] The road clearing unit, located at the front of the chassis, uses a hydraulic motor to drive the clearing rollers to rotate. The cutting teeth cut and shred obstacles, promptly clearing and crushing shrubs and other obstructions encountered on the road. A hydraulic cylinder drives the swing frame and clearing rollers to swing up and down at the front of the vehicle, clearing and crushing tall trees and other obstacles. Clearing and crushing shrubs, tall trees, and other obstacles allows the chassis to move smoothly, while simultaneously isolating fire sources and preventing the spread of fire. Additionally, the road clearing unit can swing until the cutting teeth are in contact with the ground. Driven by the rotating clearing rollers, the cutting teeth turn over soil and sand from the ground and throw them forward, covering the fire source and effectively extinguishing it. This fire truck can be considered a multi-functional fire truck.

[0076] The obstacle clearing roller is installed inside the lower part of the protective cover. The entire cover or a part of the front cover is movable. When encountering a thick tree, a push rod (such as an electric push rod) can be used to drive the entire cover or the movable cover to swing upward and backward, opening the entire cover or the movable cover to prevent the front end of the cover or the movable cover from colliding with the obstacle. This allows the cutting teeth on the obstacle clearing roller to directly contact the obstacle and carry out the obstacle clearing activity.

[0077] To prevent the cab from getting too hot when near a fire source, the cab is cooled by spraying water or misting from the front nozzles.

[0078] The fire monitor, located above the front of the chassis, can extinguish fires at a distance from the fire truck.

[0079] The rear nozzles, located at the rear of the chassis, spray water under the action of a water pump to extinguish fires behind the fire truck, especially extinguishing any remaining fires and effectively preventing reignition.

[0080] The drone carries the spray gun and flexible extension tube (including the fire extinguishing agent extension tube and the compressed air extension tube) close to the fire source and sprays the fire extinguishing agent to extinguish the fire. This can effectively extinguish fires in areas that fire trucks cannot reach, such as fires on steep cliffs.

[0081] This utility model organically integrates fire monitors, fans, and road clearing units, enabling the use of different methods to extinguish fires in a more timely and effective manner, depending on the specific fire situation and conditions at the fire site.

[0082] In tracked chassis, the angular wheel frame hinged to the chassis or the lower end of the torsion bar can swing back and forth. When the track encounters a high protrusion such as a rock or other obstacle, the angular wheel frame can swing forward, and the load-bearing wheel in front of the angular wheel frame can be lifted up, allowing the track to climb smoothly onto the protrusion. This makes it easier for the track to pass through the obstacle and continue moving.

[0083] The reset device keeps the torsion bar swinging up and down at its equilibrium position, reducing chassis vibration. This is especially suitable for the fire truck to travel on rough roads, reducing driver discomfort.

[0084] The reset device, composed of a damping shell, elastic damping column (such as a rubber column), damping wheel, etc., has a simple structure, can provide a large damping force, and has a low cost.

[0085] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A fire monitor for a multi-functional fire truck, characterized in that: It includes a base, a gun body that rotates horizontally relative to the base, a horizontal drive device for the gun body that drives the gun body to rotate horizontally relative to the base, a nozzle that swings vertically relative to the gun body, and a nozzle swinging device that drives the nozzle to swing up and down relative to the gun body. The gun body has an extinguishing agent channel, and the nozzle is connected to the outlet of the extinguishing agent channel. The inlet of the extinguishing agent channel is connected to an extinguishing agent pumping device through a pipeline. The extinguishing agent pumping device is used to pump the extinguishing agent to the fire monitor and spray it out through the nozzle.

2. The fire monitor according to claim 1, characterized in that: It also includes a compressed air pipe connected to a compressed air source. The outlet of the compressed air pipe is connected to the nozzle or the extinguishing agent channel. When the extinguishing agent is an extinguishing agent containing a foaming agent, compressed air is pulsed and intermittently delivered into the nozzle or the extinguishing agent channel through the compressed air pipe, so that the extinguishing agent forms a foam and is sprayed out of the nozzle.

3. The fire monitor according to claim 1, characterized in that: The gun body includes a fixedly connected vertical tube and a horizontal tube. The lower section of the vertical tube rotates relative to the base around the axis of the vertical tube. The horizontal tube, which serves as the extinguishing agent channel, has an extinguishing agent channel inlet and an extinguishing agent channel outlet. The nozzle is a curved pipe. The nozzle inlet section is in sealed contact with the horizontal tube outlet section in the circumferential direction. The nozzle inlet section rotates relative to the horizontal tube around the axis of the horizontal tube outlet section. The rotation of the nozzle inlet section around the axis of the horizontal tube outlet section enables the nozzle to swing up and down.

4. The fire monitor according to claim 3, characterized in that: The outer periphery of the nozzle inlet section is rotatably mounted inside the horizontal pipe outlet section via bearings, and the outer periphery of the nozzle inlet section is sealed to the inner periphery of the horizontal pipe outlet section via a sealing ring. The nozzle up-and-down swinging device includes a worm gear two mounted on the outer periphery of the nozzle inlet section, a worm gear two rotatably mounted on the horizontal pipe outlet section in cooperation with the worm gear two, and a motor two that drives the worm gear two to rotate.

5. The fire monitor according to claim 3, characterized in that: The base has a compressed air channel communicating with a compressed air source. The lower section of the vertical pipe is rotatably mounted in the outlet section of the compressed air channel via a bearing, and the lower section of the vertical pipe is sealed to the inner circumference of the outlet section of the compressed air channel via a sealing ring. The horizontal drive device of the gun body includes a worm gear three mounted on the outer circumference of the lower section of the vertical pipe, a worm three rotatably mounted on the outlet section of the compressed air channel in cooperation with the worm gear three, and a motor three that drives the worm three to rotate. The compressed air channel is connected to the horizontal pipe through the vertical pipe. When the extinguishing agent is an extinguishing agent containing a foaming agent, compressed air is intermittently supplied to the extinguishing agent channel through the compressed air channel in a pulse manner, so that the extinguishing agent forms a foam and is sprayed out of the nozzle.

6. The fire monitor according to claim 2 or 5, characterized in that: The compressed air source is a piston air compressor without an air tank, and the air outlet of the piston air compressor's valve is directly connected to the compressed air pipe.

7. The fire monitor according to claim 1, characterized in that: A flame detector is installed on the nozzle. The horizontal drive device of the gun body drives the gun body to rotate horizontally back and forth. The vertical swing device of the nozzle drives the nozzle to swing up and down back and forth. When the flame detector detects the flame, the horizontal drive device of the gun body and the vertical swing device of the nozzle stop operating. At this time, the nozzle is aligned with the flame.

8. The fire monitor according to claim 1, characterized in that: It also includes drones, flexible fire extinguishing agent extension tubes, and spray guns. The spray guns mounted on the drones are detachably connected to the nozzles via the fire extinguishing agent extension tubes. The drones drive the spray guns close to the fire source to spray fire extinguishing agents to extinguish the fire.

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