A forest fire fighting vehicle

Abstract

The present application provides a kind of forest fire fighting truck, including track chassis, be equipped with throwing device on track chassis, throwing device includes the first throwing cavity and the second throwing cavity being arranged from bottom to top, first throwing cavity and second throwing cavity are equipped with first throwing wheel and second throwing wheel respectively;The end wall and the peripheral wall of first throwing cavity are connected with first soil inlet channel and first soil delivery channel respectively, and the end wall and the peripheral wall of second throwing cavity are connected with second soil inlet channel and second soil delivery channel respectively;First soil delivery channel is connected with first soil spraying pipe, and second soil inlet channel and first soil delivery channel are connected with soil delivery branch channel, and second soil delivery channel is connected with second soil spraying pipe, and the output end of first soil spraying pipe is lower than the output end of second soil spraying pipe;Switching mechanism is provided in first soil delivery channel.The present application can cooperate with multiple working modes, and the optimal fire extinguishing mode can be selected according to the specific conditions such as fire, distance, target, wind direction and site soil quality.

Description

Technical Field

[0001] This invention relates to the field of forest fire fighting technology, specifically to a forest fire truck. Background Technology

[0002] Forest fires are devastating natural disasters that pose a serious threat to the ecological environment and human life and property. Compared with urban fires, forest fires have unique complexities and dangers.

[0003] All organic matter in a forest can be considered combustible material, and the quantity and distribution of these combustibles directly affect the flammability, intensity, spread rate, and combustion characteristics of a forest fire. Specifically, the amount of combustible material determines the heat released and the intensity of the fire after combustion; the size of the combustible material affects its flammability; and the total amount of combustible material affects the duration of combustion. Furthermore, during forest fire fighting, the availability of combustibles at the fire site has a decisive impact on subsequent cleanup efforts and the risk of secondary combustion. The more combustible material remaining after the initial fire, and the less completely the embers are extinguished, coupled with incomplete firefighting and cleanup, the easier it is for secondary combustion to occur in a short period of time. This not only increases the difficulty of firefighting but may even lead to casualties.

[0004] Unlike urban fires, which have well-developed fire prevention facilities and sufficient human and material resources, forest fires typically occur in complex terrain far from human settlements, where transportation is inconvenient and ordinary means of transport cannot quickly reach the fire site. Forest fires are often intense and spread over a wide area, requiring large quantities of firefighting supplies, but it is difficult to deliver enough resources to the fire site in a short period of time, making it difficult to control the fire quickly. Even if the open flames are extinguished, if there is not sufficient water or other firefighting supplies to completely extinguish all embers, they are very likely to reignite when factors such as wind force change, resulting in the aforementioned secondary combustion. This not only brings great difficulties to firefighting work, but also seriously threatens the safety of firefighters. At the same time, environmental factors such as wind direction and wind force in forest fire sites are unpredictable, and traditional firefighting equipment and strategies are difficult to adjust quickly to adapt to these dynamic changes. Summary of the Invention

[0005] This invention aims to solve the problems of inconvenient transportation, difficulty in water supply, lack of extinguishing agents, high risk of reignition, and poor adaptability of traditional equipment in existing forest fire fighting technologies. It provides a forest fire truck that can use on-site soil as a fire extinguishing medium, is highly mobile, has high fire extinguishing efficiency, and has multiple fire extinguishing strategies.

[0006] The present invention adopts the following technical solution.

[0007] A forest fire truck includes a tracked chassis, on which a throwing device is provided. The throwing device includes a first throwing chamber and a second throwing chamber arranged from bottom to top, and a first throwing wheel and a second throwing wheel are respectively provided in the first throwing chamber and the second throwing chamber.

[0008] The end wall and peripheral wall of the first soil throwing cavity are respectively connected to a first soil inlet channel and a first soil delivery channel, and the end wall and peripheral wall of the second soil throwing cavity are respectively connected to a second soil inlet channel and a second soil delivery channel.

[0009] The first soil delivery channel is connected to a first spray pipe, and a soil delivery branch channel is connected between the second soil inlet channel and the first soil delivery channel. The second soil delivery channel is connected to a second spray pipe, and the output end of the first spray pipe is lower than the output end of the second spray pipe.

[0010] The first soil delivery channel is equipped with a switching mechanism, which enables the first soil throwing chamber to be connected to the first soil spraying pipe, or to be connected to the soil delivery branch channel.

[0011] Furthermore, the switching mechanism includes a guide plate hinged to the first soil delivery channel and a first power mechanism driven by the guide plate.

[0012] Furthermore, the periphery of the second soil-throwing chamber is connected to an air supply channel, which is connected to the first soil-spraying pipe. A first sealing mechanism is provided at the air supply channel, which can open or close the air supply channel.

[0013] Furthermore, the first sealing mechanism includes a wind deflector slidably connected to the second soil dumping chamber, and a first actuation mechanism drivenly connected to the wind deflector.

[0014] Furthermore, the peripheral wall of the second soil-throwing chamber is connected to a counter-attack channel, through which the blasting rays of the second soil-throwing wheel pass and intersect with the blasting rays of the first soil-throwing wheel within the first soil-feeding channel; a second sealing mechanism is provided at the counter-attack channel, which can open or close the counter-attack channel. This structure is specifically designed to achieve a soil pulverization mode.

[0015] Furthermore, the second sealing mechanism includes a retaining plate slidably connected to the second soil dumping chamber, and a second actuation mechanism drivenly connected to the retaining plate.

[0016] Furthermore, the first and second spray pipes are respectively provided with a first blocking mechanism and a second blocking mechanism. The first blocking mechanism is used to open or close the first spray pipe, and the second blocking mechanism is used to open or close the second spray pipe.

[0017] Furthermore, both the first blocking mechanism and the second blocking mechanism include a gate and a second power mechanism driven by the gate.

[0018] Furthermore, the tracked chassis is also equipped with a soil conveying device, which includes a lifting frame hinged to the tracked chassis. The lifting frame is movably connected to the tracked chassis via a lifting hydraulic cylinder. A loosening plow and a soil conveying shovel are sequentially connected to the lifting frame along the traveling direction of the tracked chassis.

[0019] Furthermore, the soil conveying device also includes a lifting conveyor belt and an auger connected in sequence with the soil conveying shovel, and the output end of the auger is connected to the first soil inlet channel.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. Thorough fire extinguishing and effective prevention of reignition: Soil covering has excellent suffocation (isolating air), cooling (absorbing heat), and isolation (covering combustibles) effects. Compared to water, whose effectiveness diminishes after evaporation, soil can cover burning materials and embers for a longer period of time. It is particularly effective in extinguishing deep smoldering fires such as those from tree roots and underground humus layers, significantly reducing the difficulty of fire scene cleanup and the risk of secondary combustion (reignition), thus improving the thoroughness of fire extinguishing.

[0022] 2. High mobility and accessibility: The tracked chassis design gives it excellent off-road performance and the ability to pass through complex terrain. It can better adapt to unstructured road environments such as forests and mountains, and make it easier to approach the fire line and fire source for operation, thus improving the accessibility of firefighting equipment.

[0023] 3. Precise and efficient soil distribution with diverse modes: By switching mechanisms, the equipment can flexibly control the soil delivery path: it can be thrown directly through the first spray pipe, or it can enter the second soil distribution chamber through a branch channel and then be thrown out through the second spray pipe. This design greatly increases operational flexibility, allowing the equipment to adjust the distribution pattern and distance according to specific conditions such as fire intensity, distance, target (e.g., surface fire, crown fire, smoldering embers), wind direction, and soil conditions. Ultimately, the equipment can precisely and efficiently distribute soil to designated locations, effectively suppressing fires or covering smoldering embers to meet various firefighting needs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the throwing device in one embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the low-speed soil dumping mode at low locations in this invention.

[0028] Figure 4 This is a schematic diagram of the high-altitude low-speed soil dumping mode in this invention.

[0029] Figure 5 This is a schematic diagram of the high-speed soil dumping mode at low altitudes in this invention.

[0030] Figure 6 This is a schematic diagram illustrating the operation of the low-speed, low-ground soil dumping mode with a pulverizing function in this invention.

[0031] Figure 7 This is a schematic diagram of the high-altitude, low-speed soil dumping method with a crushing function in this invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Tracked chassis;

[0034] 2. Soil conveying device; 20. Lifting frame; 21. Lifting hydraulic cylinder; 22. Soil loosening plow; 23. Soil conveying shovel; 24. Lifting conveyor belt; 25. Screwdriver;

[0035] 3. Switching mechanism; 31. Guide plate; 32. First power mechanism;

[0036] 40. Throwing device;

[0037] 41. First soil dumping chamber; 411. First soil dumping wheel; 412. First soil inlet channel; 413. First soil delivery channel;

[0038] 42. Second soil dumping chamber; 421. Second soil dumping wheel; 422. Second soil inlet channel; 423. Second soil delivery channel; 424. Air supply channel; 425. Windbreak plate; 426. Counter-attack channel; 427. Soil retaining plate;

[0039] 43. First spray pipe; 44. Soil delivery branch channel; 45. Second spray pipe; 451. Gate. Detailed Implementation

[0040] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0041] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] This invention provides a forest fire truck, whose core design aims to cope with rugged forest terrain and achieve efficient firefighting. (See attached image) Figure 1-7 As shown, this fire truck mainly consists of a tracked chassis 10, a soil conveying device 2 and a throwing device 40 mounted on the chassis.

[0043] The fire truck uses a tracked walking mechanism, ensuring excellent mobility and stability even in complex, sloping terrain in forest areas.

[0044] To obtain the sand or soil needed for firefighting, a soil conveying device 2 is specially installed on the tracked chassis 10. This device is responsible for transporting the collected sand or soil to the throwing device 40.

[0045] The soil conveying device 2 includes a lifting frame 20 hinged to the tracked chassis 10. The lifting frame 20 is movably connected to the tracked chassis 10 via a lifting hydraulic cylinder 21, which allows for flexible adjustment of the soil-collecting component's penetration depth and also allows it to be completely lifted off the ground for easy vehicle movement. Along the travel direction of the tracked chassis 10, a loosening plow 22 and a soil-feeding shovel 23 are sequentially connected to the lifting frame 20. During operation, the loosening plow 22 first breaks up the hard ground, and then the soil-feeding shovel 23 collects the loosened sand or soil.

[0046] The soil conveying device 2 also includes a lifting conveyor belt 24 and an auger 25 connected in sequence with the soil delivery shovel 23. The soil collected by the soil delivery shovel 23 is sent to the lifting conveyor belt 24, which lifts it to a certain height and then sends it into the auger 25. The output end of the auger 25 is connected to the first soil inlet channel 412 of the throwing device 40 to realize the continuous supply of soil.

[0047] The throwing device 40 is the core component for extinguishing fires with soil. It includes a first throwing chamber 41 and a second throwing chamber 42, which are vertically arranged from bottom to top.

[0048] The first soil-throwing chamber 41 is located at the lower part, and its end wall is connected to a first soil-inlet channel 412 (connected to the output end of the aforementioned auger 25) for receiving soil from the soil-transporting device 2. The peripheral wall of the first soil-throwing chamber 41 is connected to a first soil-feeding channel 413. A first soil-throwing wheel 411 is provided inside the first soil-throwing chamber 41. The first soil-throwing wheel 411 rotates at high speed, and the soil entering the chamber is thrown out along the first soil-feeding channel 413 by centrifugal force.

[0049] The second soil-throwing chamber 42 is located above the first soil-throwing chamber 41. Its end wall is connected to a second soil-inlet channel 422, and its peripheral wall is connected to a second soil-feeding channel 423. The second soil-throwing chamber 42 is equipped with a second soil-throwing wheel 421, which is used to accelerate and throw the incoming soil material a second time.

[0050] The first soil delivery channel 413 is connected to the first soil spraying pipe 43, which is used to directly spray the soil thrown by the first soil throwing wheel 411 toward the fire point.

[0051] The second soil delivery channel 423 is connected to a second soil spraying pipe 45, which is used to spray the soil thrown by the second soil throwing wheel 421 toward the fire point. According to the design, the output end of the first soil spraying pipe 43 is lower than the output end of the second soil spraying pipe 45, so that two throwing points at different heights can be formed to meet the fire extinguishing needs at different distances and heights.

[0052] A soil delivery branch channel 44 connects the second soil inlet channel 422 and the first soil delivery channel 413. This means that the soil thrown out from the first soil throwing chamber 41 can selectively enter the second soil inlet channel 422 connected to the second soil throwing chamber 42 through the soil delivery branch channel 44, and then be accelerated by the second soil throwing wheel 421 and sprayed out from the second soil spraying pipe 45.

[0053] A switching mechanism 3 is provided within the first soil delivery channel 413. This switching mechanism 3 preferably includes a guide plate 31 hinged to the first soil delivery channel 413, and a first power mechanism 32 drivenly connected to the guide plate 31. By controlling the angle of the guide plate 31, the flow direction of the soil ejected from the first soil throwing chamber 41 can be changed. The first power mechanism 32 includes a transmission rod with one end connected to the guide plate 31, and the other end of the transmission rod hinged to the movable end of a driving member. The driving member can be an electric push rod or a hydraulic cylinder, and is rotatably mounted on the first soil delivery channel 413.

[0054] The switching mechanism can be used to directly connect the first soil throwing chamber 41 with the first soil spraying pipe 43, and the soil can be sprayed out from the first soil spraying pipe 43; or the first soil throwing chamber 41 can be connected with the soil delivery branch channel 44, and the soil can be guided to the soil delivery branch channel 44, enter the second soil throwing chamber 42, and then be sprayed out from the second soil spraying pipe 45.

[0055] The first spraying pipe 43 and the second spraying pipe 45 are respectively provided with a first blocking mechanism and a second blocking mechanism, which are used to open or close the corresponding spraying pipes when needed. Each blocking mechanism preferably includes a gate plate 451 and a second power mechanism drivenly connected to the gate plate 451 (since the structure and principle of the second power mechanism are the same or similar to those of the first power mechanism, they will not be described in detail here), which can quickly cut off or open the delivery of soil.

[0056] The peripheral wall of the second soil-throwing chamber 42 may also be connected to an air supply channel 424, which communicates with the first soil-throwing pipe 43. A first sealing mechanism is provided at the air supply channel 424, for example, consisting of a baffle plate 425 and a first actuating mechanism that drives its sliding. Specifically, the first actuating mechanism is used to drive the baffle plate 425 to move linearly; it can be a hydraulic / pneumatic push rod mechanism or a motor-driven linkage / gear mechanism. Since these mechanisms are well known to those skilled in the art, they will not be described in detail here. When needed, the first sealing mechanism opens the air supply channel 424, and the second soil-throwing wheel 421 rotates to generate a high-speed airflow. This airflow enters the first soil-throwing pipe 43 through the air supply channel 424, increasing the moving speed of the soil within the first soil-throwing pipe 43, thereby extending the range of the soil thrown by the first soil-throwing pipe 43.

[0057] The peripheral wall of the second soil-throwing cavity 42 is connected to a counter-attack channel 426. The ray of the second soil-throwing wheel 421 (i.e., the trajectory direction of the soil material it moves when rotating) is designed to pass through this counter-attack channel 426 and intersect with the ray of the first soil-throwing wheel 411 within the first soil-feeding channel 413. A second sealing mechanism is provided at the counter-attack channel 426, for example, consisting of a retaining plate 427 and a second actuation mechanism that drives its sliding (since the structure and principle of the second actuation mechanism are the same or similar to those of the first actuation mechanism, they will not be described in detail here).

[0058] Specifically, the principle of using the impact channel 426 to crush soil is as follows:

[0059] During operation, the second sealing mechanism opens the counterattack channel 426. The first throwing wheel 411 rotates clockwise (or other preset direction), and the second throwing wheel 421 also rotates clockwise (or other preset direction, the key being that its throwing rays can act on the material in the first soil delivery channel 413 through the counterattack channel 426).

[0060] In this process, the first throwing wheel 411 rotates at high speed, throwing the soil input from the first infeed channel 412 upward along the first delivery channel 413, and finally passing through the impact channel 426 into the second throwing chamber 42. At the same time, the second throwing wheel 421 also rotates at high speed, throwing the soil downward along the first delivery channel 413 through the impact channel 426, creating an impact collision with the upward-moving soil.

[0061] Inside the first soil delivery channel 413, the soil thrown upwards by the first soil throwing wheel 411 collides violently, in multiple directions, and at high speeds with the soil thrown downwards by the second soil throwing wheel 421. Furthermore, this collision alters the direction of motion of some of the soil, triggering multiple subsequent repeated collisions, such as re-throwing it downwards back into the lower part of the first soil delivery channel 413 or the upper part of the first soil throwing cavity 41, where it collides again with subsequently upward-moving soil.

[0062] Through this continuous, intense, multi-directional, and high-speed collision, large or cohesive clumps of soil can be effectively crushed into fine, uniform soil particles.

[0063] Following the above, as attached Figure 6 and 7 As shown, since the structure of the second soil-throwing chamber 42 does not completely cover the soil-passing cross section of the first soil-feeding channel 413, when the first soil-throwing wheel 411 rotates, some of the crushed or uncrushed soil material enters the first spraying pipe 43 under the drive of the first soil-throwing wheel 411. Furthermore, given the gap between the wheel blades of the second soil-throwing wheel 421, when the second soil-throwing wheel 421 rotates, some of the crushed or uncrushed soil material will enter the second spraying pipe 45 through the second soil-feeding channel 423 under the drive of the second soil-throwing wheel 421. The first spraying pipe 43 and the second spraying pipe 45 are respectively equipped with a first blocking mechanism and a second blocking mechanism. At this time, if the first spray pipe 43 is closed by the first blocking mechanism, the pulverized or uncrushed soil material that has entered into it will not be sprayed out of the first spray pipe 43, but will fall back into the first throwing chamber 41 under the action of gravity; similarly, if the second spray pipe 45 is closed by the second blocking mechanism, the pulverized or uncrushed soil material that has entered into it will not be sprayed out of the second spray pipe 45, but will fall back into the second throwing chamber 42 under the action of gravity.

[0064] This crushing action greatly improves adaptability to different soil types, ensuring smooth delivery and uniform fire suppression coverage.

[0065] During operation, the forest fire truck approaches the edge of the fire area. The operator drives the fire truck to the soil collection point and activates the lifting hydraulic cylinder 21, causing the loosening plow 22 and the soil delivery shovel 23 to contact the ground. The vehicle moves slowly, the loosening plow 22 breaks up the ground, and the soil delivery shovel 23 collects the soil and sends it to the lifting conveyor belt 24, which then feeds it into the first soil inlet channel 412 of the throwing device 40 via the auger 25.

[0066] Depending on the fire situation, the throwing device 40 can adopt different throwing modes to achieve the best fire extinguishing effect.

[0067] The scattered soil covers the surface of the burning material, suffocating, cooling, and isolating it, thus effectively extinguishing the fire. Because it uses locally sourced soil, it avoids the difficulties of transporting water, making it particularly suitable for water-scarce areas and scenarios requiring thorough extinguishing of embers and prevention of reignition.

[0068] This invention includes at least the following five fire extinguishing modes:

[0069] 1. Low-speed dumping of soil from a high place:

[0070] like Figure 3As shown, both the first throwing wheel 411 and the second throwing wheel 421 rotate. The switching mechanism 3 connects the first throwing chamber 41 with the soil delivery branch channel, and the second blocking mechanism opens the second spraying pipe 45. Soil enters the first throwing chamber 41 from the first inlet channel 412. Driven by the first throwing wheel 411, it passes through the soil delivery branch channel 44 and the second inlet channel 422 in sequence into the second throwing chamber 42. Finally, driven by the second throwing wheel 421, the soil is sprayed out from the second spraying pipe 45 through the second soil delivery channel 423.

[0071] Specifically, both the first soil-spreading wheel 411 and the second soil-spreading wheel 421 rotate clockwise.

[0072] This mode enables long-distance firefighting, such as extinguishing ground fires or fire lines far from fire trucks. It can also involve throwing soil onto burning tree canopies for smothering and cooling. Furthermore, it allows for the creation of long-distance firebreaks by pre-scattering soil at a considerable distance.

[0073] 2. Low-speed dumping of soil at low elevations:

[0074] like Figure 4 As shown, the first soil-throwing wheel 411 rotates, while the second soil-throwing wheel 421 does not rotate. The switching mechanism 3 connects the first soil-throwing chamber 41 to the first soil-jetting pipe 43. The first sealing mechanism closes the air supply channel 424, the second sealing mechanism closes the counter-attack channel 426, and the first blocking mechanism opens the first soil-jetting pipe 43. Soil enters the first soil-throwing chamber 41 from the first soil inlet channel 412 and, driven by the first soil-throwing wheel 411, is finally ejected from the first soil-jetting pipe 43.

[0075] Specifically, the first soil-throwing wheel 411 rotates clockwise.

[0076] This mode enables close-range fire suppression, precisely covering ground fires and open flames near the fire truck. Secondly, it can handle remaining fires, such as by covering smoldering tree stumps, fallen logs, or thick layers of humus to smother the flames and prevent reignition.

[0077] 3. High-speed dumping of soil at low elevations:

[0078] like Figure 5As shown, the first soil-throwing wheel 411 rotates, the second soil-throwing wheel 421 rotates, the switching mechanism 3 connects the first soil-throwing chamber 41 with the first soil-jetting pipe 43, the first sealing mechanism opens the air supply channel 424, the second sealing mechanism closes the counterattack channel 426, and the first blocking mechanism opens the first soil-jetting pipe 43. Soil enters the first soil-throwing chamber 41 from the first soil inlet channel 412, and under the drive of the first soil-throwing wheel 411, is finally ejected from the first soil-jetting pipe 43. Simultaneously, the rotation of the second soil-throwing wheel 421 generates a high-speed airflow, which enters the first soil-jetting pipe 43 through the air supply channel 424, increasing the movement speed of the soil within the first soil-jetting pipe 43, thereby extending the range of the soil thrown by the first soil-jetting pipe 43.

[0079] Specifically, the first soil-spraying wheel 411 rotates clockwise; the second soil-spraying wheel 421 rotates counterclockwise.

[0080] At this time, the sand or soil has greater kinetic energy and impact force, and the throwing distance is farther and the speed is faster than the low-speed throwing mode at low places.

[0081] This method allows for the rapid and powerful shoveling of large amounts of soil onto areas of intense fire, impacting the flames and quickly suppressing the fire. Furthermore, the high-speed soil flow penetrates the surface of burning materials, covering internal fire points. In addition, it ensures the accuracy of close-range soil distribution even under certain wind conditions.

[0082] 4. Low-speed, low-level soil dumping with a shredding function:

[0083] like Figure 6 As shown, the first throwing wheel 411 rotates, the second throwing wheel 421 rotates, the switching mechanism 3 connects the first throwing chamber 41 to the first spray pipe 43, the first sealing mechanism closes the air supply channel 424, the second sealing mechanism opens the counterattack channel 426, the first blocking mechanism opens the first spray pipe 43, and the second blocking mechanism closes the second spray pipe 45. During the rotation of the first throwing wheel 411, it throws the soil input from the first inlet channel 412 upwards along the first delivery channel 413. Some of the soil passes through the counterattack channel 426 and enters the second throwing chamber 42. The rotating second throwing wheel 421, through the counterattack channel 426, throws some of the soil entering the second throwing chamber 42 downwards along the first delivery channel 413, creating a collision with the upward-moving soil, thus crushing the soil.

[0084] Next, given that the structure of the second soil-throwing chamber 42 fails to completely cover the soil-passing section of the first soil-delivering channel 413, when the first soil-throwing wheel 411 rotates, some soil will not enter the counter-attack channel 426, but will instead enter the first spraying pipe 43 under the drive of the first soil-throwing wheel 411, and finally be sprayed out from the first spraying pipe 43.

[0085] It should be noted that in this embodiment, the impact channel 426 is connected to the side of the first soil delivery channel 413 away from the first soil throwing wheel 411. As is well known, large or cohesive soil clumps have a larger mass, while fine, uniform soil particles have a smaller mass. According to the principle of centrifugal separation, when these soil particles are driven by the first soil throwing wheel 421, large or cohesive soil clumps are more likely to move along the side of the first soil delivery channel 413 away from the first soil throwing wheel 421, thus entering the second soil throwing chamber 42 through the impact channel 426; while fine, uniform soil particles are more likely to move along the side of the first soil delivery channel 413 closer to the first soil throwing wheel 421, thus entering the first spray pipe 43 and finally being sprayed out from the first spray pipe 43.

[0086] Specifically, the first soil-spraying wheel 411 rotates clockwise; the second soil-spraying wheel 421 rotates clockwise.

[0087] When the excavated soil is of poor quality, containing many stones, grass roots, or large clods, this pretreatment method can be used to improve the uniformity of the extinguishing medium. It also provides a fine covering effect, using finer soil to cover remaining embers, especially sparks in crevices, for better smothering. It can also be used to treat stubborn smoldering points that require close proximity and fine soil coverage.

[0088] 5. High-altitude, low-speed soil dumping with a shredding function:

[0089] like Figure 7 As shown, the first throwing wheel 411 rotates, the second throwing wheel 421 rotates, the switching mechanism 3 connects the first throwing chamber 41 to the first spray pipe 43, the first sealing mechanism closes the air supply channel 424, the second sealing mechanism opens the counter-attack channel 426, the first blocking mechanism closes the first spray pipe 43, and the second blocking mechanism opens the second spray pipe 45. During the rotation of the first throwing wheel 411, it throws the soil input from the first inlet channel 412 upwards along the first delivery channel 413. Some of the soil passes through the counter-attack channel 426 and enters the second throwing chamber 42. The rotating second throwing wheel 421, through the counter-attack channel 426, throws some of the soil entering the second throwing chamber 42 downwards along the first delivery channel 413, creating a collision with the upward-moving soil, thus crushing the soil.

[0090] Next, given the gap between the wheel plates of the second soil-throwing wheel 421, when the second soil-throwing wheel 421 rotates, some of the soil in the second soil-throwing chamber will be driven by the second soil-throwing wheel 421, enter the second soil-spraying pipe 45 through the second soil-feeding channel 423, and finally be sprayed out from the second soil-spraying pipe 43.

[0091] It should be noted that large or cohesive soil clumps have a greater mass and experience greater gravity, while small, uniform soil particles have a smaller mass and experience less gravity. Based on the principles of centrifugal separation and force composition, when these soil particles are driven by the second soil-throwing wheel 421, large or cohesive soil clumps tend to fall more easily and are more likely to pass through the impact channel 426 downwards; while small, uniform soil particles have a less downward tendency and are more likely to move upwards along the second soil-feeding channel 423, eventually being ejected from the first spray pipe 43.

[0092] Specifically, the first soil-spraying wheel 411 rotates clockwise; the second soil-spraying wheel 421 rotates clockwise.

[0093] This mode allows you to scatter broken-up fine soil over distant embers or at the base of trees. It addresses fires at higher elevations (such as the upper part of bushes or higher tree bases) that require fine soil for effective coverage, bypassing obstacles and covering the target area with treated fine soil.

[0094] It should be noted that in the special mode, the first soil-throwing wheel 411 rotates, the second soil-throwing wheel 421 rotates, the switching mechanism 3 connects the first soil-throwing chamber 41 with the first soil-spraying pipe 43, the first sealing mechanism closes the air supply channel 424, the second sealing mechanism opens the counter-attack channel 426, the first blocking mechanism closes the first soil-spraying pipe 43, and the second blocking mechanism closes the second soil-spraying pipe 45. In this way, the soil in the throwing device can be continuously crushed until the soil reaches the required fineness and uniformity.

[0095] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A forest fire fighting vehicle comprising a caterpillar chassis, on which a throwing device is arranged, characterized in that The throwing device comprises a first throwing cavity and a second throwing cavity arranged from bottom to top, and the first throwing cavity and the second throwing cavity are respectively provided with a first throwing wheel and a second throwing wheel; The end wall and the peripheral wall of the first throwing cavity are respectively connected with a first earth inlet channel and a first earth conveying channel, and the end wall and the peripheral wall of the second throwing cavity are respectively connected with a second earth inlet channel and a second earth conveying channel; The first earth conveying channel is connected with a first earth spraying pipe, the second earth inlet channel and the first earth conveying channel are connected with an earth conveying branch channel, the second earth conveying channel is connected with a second earth spraying pipe, and the output end of the first earth spraying pipe is lower than the output end of the second earth spraying pipe; The first earth conveying channel is provided with a switching mechanism, and the switching mechanism can make the first throwing cavity communicate with the first earth spraying pipe or make the first throwing cavity communicate with the earth conveying branch channel; The peripheral wall of the second throwing cavity is connected with an air conveying channel, the air conveying channel communicates with the first earth spraying pipe, the air conveying channel is provided with a first blocking mechanism, and the first blocking mechanism can open or close the air conveying channel; The peripheral wall of the second throwing cavity is connected with a counter-attack channel, the projection line of the second throwing wheel passes through the counter-attack channel and intersects with the projection line of the first throwing wheel in the first earth conveying channel; The counter-attack channel is provided with a second blocking mechanism, and the second blocking mechanism can open or close the counter-attack channel; The first earth spraying pipe and the second earth spraying pipe are respectively provided with a first blocking mechanism and a second blocking mechanism, the first blocking mechanism is used for opening or closing the first earth spraying pipe, and the second blocking mechanism is used for opening or closing the second earth spraying pipe.

2. A forest fire fighting vehicle according to claim 1, characterized in that The switching mechanism comprises a guide plate hinged with the first earth conveying channel and a first power mechanism in driving connection with the guide plate.

3. The forest fire fighting vehicle of claim 1, wherein The first blocking mechanism comprises a wind baffle in sliding connection with the second throwing cavity and a first actuating mechanism in driving connection with the wind baffle.

4. The forest fire fighting vehicle of claim 1, wherein The second blocking mechanism comprises an earth baffle in sliding connection with the second throwing cavity and a second actuating mechanism in driving connection with the earth baffle.

5. The forest fire fighting vehicle of claim 1, wherein The first blocking mechanism and the second blocking mechanism both comprise a gate plate and a second power mechanism in driving connection with the gate plate.

6. A forest fire fighting vehicle according to claim 1, characterized in that The track chassis is further provided with an earth conveying device, the earth conveying device comprises a lifting frame hinged with the track chassis, the lifting frame is movably connected with the track chassis through a lifting hydraulic cylinder, and the lifting frame is sequentially connected with a soil loosening plow and an earth conveying shovel along the running direction of the track chassis.

7. A forest fire fighting vehicle according to claim 6, characterised in that The earth conveying device further comprises a lifting conveyor and an auger sequentially connected with the earth conveying shovel, and the output end of the auger is connected with the first earth inlet channel.

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