Forest fire fighting truck

Abstract

The invention provides a forest fire fighting truck which comprises a crawler chassis, a throwing device is arranged on the crawler chassis, the throwing device comprises a first soil throwing cavity and a second soil throwing cavity which are arranged from bottom to top, and a first soil throwing wheel and a second soil throwing wheel are arranged in the first soil throwing cavity and the second soil throwing cavity respectively; the end wall and the peripheral wall of the first soil throwing cavity are connected with a first soil inlet channel and a first soil conveying channel correspondingly, and the end wall and the peripheral wall of the second soil throwing cavity are connected with a second soil inlet channel and a second soil conveying channel correspondingly. The first soil feeding channel is connected with a first soil spraying pipe, a soil feeding branch channel is connected between the second soil feeding channel and the first soil feeding channel, the second soil feeding channel is connected with a second soil spraying pipe, and the output end of the first soil spraying pipe is lower than the output end of the second soil spraying pipe; and a switching mechanism is arranged in the first soil conveying channel. The system can be matched with multiple working modes, and the optimal fire extinguishing mode can be selected according to specific conditions such as fire behavior, distance, target, wind direction and field soil texture.

Description

Technical Field

[0001] The present invention relates to the technical field of forest fire fighting, in particular to a forest fire fighting vehicle. Background Art

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

[0003] All organic matter in a forest can be considered combustible. The quantity and distribution of these combustibles directly affect the flammability, intensity, spread rate, and combustion properties of a forest fire. Specifically, the amount of combustible material determines the amount of 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 the burn. Furthermore, during forest fire fighting, the combustible material conditions at the fire scene also have a decisive impact on subsequent cleanup and the risk of secondary combustion. The more combustible material remaining after the initial combustion, the less thoroughly extinguished the residual fire, and incomplete firefighting and cleanup efforts, the more likely secondary combustion will occur in a short period of time. This not only increases the difficulty of firefighting but can even result in casualties.

[0004] Unlike urban fires, which are often plagued by robust fire prevention infrastructure and ample human and material resources, forest fires typically occur in complex terrain far from human settlements, where transportation is difficult and quick access to the fire site is difficult. Forest fires are often intense and widespread, requiring large quantities of firefighting supplies. However, sufficient resources cannot be delivered to the fire site in a short period of time, making rapid control difficult. Even if the open flames are extinguished, without sufficient water or other firefighting supplies to completely extinguish all flames, they can easily reignite when factors such as wind speed fluctuate, creating the aforementioned secondary combustion. This not only greatly complicates firefighting efforts but also poses a serious threat to the safety of firefighters. Furthermore, environmental factors such as wind direction and speed at forest fire sites are highly variable, making it difficult for traditional firefighting equipment and strategies to adapt quickly to these dynamic conditions. Summary of the Invention

[0005] The present invention aims to solve the problems existing in forest fire fighting in the prior art, such as inconvenient transportation, difficult water supply, lack of fire extinguishing agents, high risk of re-ignition and poor adaptability of traditional equipment, and provide a forest fire fighting vehicle that can use on-site soil as a fire extinguishing medium, has strong maneuverability, high fire extinguishing efficiency and multiple fire extinguishing strategies.

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

[0007] A forest fire truck comprises a crawler chassis, wherein the crawler chassis is provided with a throwing device, wherein the throwing device comprises a first throwing cavity and a second throwing cavity arranged from bottom to top, wherein a first throwing wheel and a second throwing wheel are respectively provided in the first throwing cavity and the second throwing cavity;

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

[0009] The first soil delivery channel is connected to a first soil injection pipe, a soil delivery branch channel is connected between the second soil feed channel and the first soil delivery channel, the second soil delivery channel is connected to a second soil injection pipe, and an output end of the first soil injection pipe is lower than an output end of the second soil injection pipe;

[0010] A switching mechanism is provided in the first soil delivery channel, and the switching mechanism can connect the first soil throwing cavity with the first soil injection pipe, or connect the first soil throwing cavity with the soil delivery branch channel.

[0011] Furthermore, the switching mechanism includes a guide plate hinged to the first soil feeding channel, and a first power mechanism drivingly connected to the guide plate.

[0012] Furthermore, the peripheral wall of the second soil-throwing cavity is connected to an air supply channel, the air supply channel is communicated with the first soil-spraying pipe, and a first blocking mechanism is provided at the air supply channel, which can open or close the air supply channel.

[0013] Furthermore, the first blocking mechanism includes a windshield plate slidably connected to the second soil throwing cavity, and a first actuating mechanism drivingly connected to the windshield plate.

[0014] Furthermore, the peripheral wall of the second ejection cavity is connected to a repulsion channel. The ejection line of the second ejection wheel passes through the repulsion channel and intersects with the ejection line of the first ejection wheel in the first soil delivery channel. A second blocking mechanism is provided at the repulsion channel, which can open or close the repulsion channel. This structure is particularly suitable for achieving a soil crushing mode.

[0015] Furthermore, the second blocking mechanism includes a soil retaining plate slidably connected to the second soil throwing cavity, and a second actuating mechanism drivingly connected to the soil retaining plate.

[0016] Furthermore, a first blocking mechanism and a second blocking mechanism are respectively provided in the first soil spraying pipe and the second soil spraying pipe, the first blocking mechanism is used to open or close the first soil spraying pipe, and the second blocking mechanism is used to open or close the second soil spraying pipe.

[0017] Furthermore, the first blocking mechanism and the second blocking mechanism both include a gate plate and a second power mechanism drivingly connected to the gate plate.

[0018] Furthermore, a soil transporting device is also provided on the crawler chassis, and the soil transporting device includes a lifting frame hinged to the crawler chassis, and the lifting frame is movably connected to the crawler chassis through a lifting hydraulic cylinder. The lifting frame is sequentially connected to a loosening plow and a soil feeding shovel along the traveling direction of the crawler chassis.

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

[0020] The beneficial effects of the present invention are:

[0021] 1. Thoroughly extinguish fires and effectively prevent re-ignition: Mud cover has excellent suffocating (isolating air), cooling (absorbing heat), and insulating (covering combustible materials) effects. Compared to water, whose effectiveness diminishes after evaporation, mud can cover burning materials and embers for a long time. It is particularly effective in extinguishing deep smoldering fires, such as those at tree roots and in underground humus layers. It can significantly reduce the difficulty of fire scene cleanup and the risk of secondary combustion (reignition), thereby improving the thoroughness of fire extinguishing.

[0022] 2. Flexible and maneuverable with good accessibility: The crawler 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, making it easier to approach fire lines and fire sources for operations, thereby improving the accessibility of fire-fighting equipment.

[0023] 3. Accurate and efficient spreading, with diverse modes: Through the switching mechanism, the equipment can flexibly control the transportation path of the soil material: it can be thrown directly through the first soil-spraying pipe, or it can enter the second soil-spraying cavity through the soil-feeding branch channel and then be thrown out by the second soil-spraying pipe. This design greatly increases the flexibility of operation, allowing the equipment to adjust the form and distance of throwing according to the specific conditions such as the fire intensity, distance, target (such as surface fire, crown fire, afterfire), wind direction, and on-site soil quality. Ultimately, the equipment can accurately and efficiently spread the soil to the designated location, effectively suppressing the fire or covering the afterfire to meet various fire-fighting needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of a throwing device in one embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the working of the low-speed soil throwing mode of the present invention;

[0028] Figure 4 This is a schematic diagram of the working of the high-altitude low-speed soil throwing mode of the present invention;

[0029] Figure 5 This is a schematic diagram of the working of the low-level high-speed soil throwing mode of the present invention;

[0030] Figure 6 This is a schematic diagram of the low-speed soil throwing method in the present invention with a crushing function mode.

[0031] Figure 7 This is a schematic diagram of the working mode of the high-altitude low-speed soil throwing device with a crushing function in the present invention.

[0032] Description of reference numerals:

[0033] 10. Track chassis;

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

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

[0036] 40. Throwing device;

[0037] 41. First soil throwing cavity; 411. First soil throwing wheel; 412. First soil feeding channel; 413. First soil delivery channel;

[0038] 42. Second earth throwing cavity; 421. Second earth throwing wheel; 422. Second earth feeding channel; 423. Second earth delivery channel; 424. Air supply channel; 425. Wind deflector; 426. Counterattack channel; 427. Earth retaining plate;

[0039] 43. First soil injection pipe; 44. Soil delivery branch channel; 45. Second soil injection pipe; 451. Gate. DETAILED DESCRIPTION

[0040] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. In order to better illustrate this embodiment, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual size of the product.

[0041] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0042] The present invention provides a forest fire fighting vehicle, the core design of which is intended to cope with the rugged forest terrain and extinguish fires efficiently. Figure 1-7 As shown, this fire truck mainly consists of a crawler chassis 10, a soil transport device 2 installed on the chassis, and a throwing device 40.

[0043] The fire truck adopts a crawler-type walking mechanism to ensure excellent trafficability and stability in complex and multi-slope terrain in forest areas.

[0044] In order to obtain the sand or soil required for fire extinguishing, a soil conveying device 2 is specially provided on the crawler chassis 10. The device is responsible for conveying the collected sand or soil to the throwing device 40.

[0045] The soil transport device 2 comprises a lifting frame 20 articulated to the crawler chassis 10. This lifting frame 20 is flexibly connected to the crawler chassis 10 via a lifting hydraulic cylinder 21. This allows the soil-collecting components to be flexibly adjusted in depth and can be completely lifted off the ground for easier travel. A loosening plow 22 and a soil-feeding shovel 23 are attached to the lifting frame 20, in sequence, along the direction of travel of the crawler chassis 10. During operation, the loosening plow 22 first breaks up the hard ground, while the soil-feeding shovel 23 then collects the loosened sand or soil.

[0046] The soil transport device 2 also includes a lifting conveyor belt 24 and an auger 25, which are sequentially connected to the soil shovel 23. The soil collected by the soil shovel 23 is fed to the lifting conveyor belt 24, which lifts it to a certain height before feeding 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, achieving a continuous supply of soil.

[0047] The throwing device 40 is a core component for realizing soil material fire extinguishing. It comprises a first soil throwing cavity 41 and a second soil throwing cavity 42 which are vertically arranged from bottom to top.

[0048] The first ejection chamber 41 is located at the bottom, its end wall connected to a first soil inlet channel 412 (interfacing with the output end of the auger 25) for receiving soil from the soil transport device 2. The surrounding wall of the first ejection chamber 41 is connected to a first soil delivery channel 413. A first ejection wheel 411 is installed within the first ejection chamber 41. The first ejection wheel 411 rotates at high speed, using centrifugal force to eject soil entering the chamber along the first soil delivery channel 413.

[0049] The second throwing cavity 42 is located above the first throwing cavity 41. Its end wall is connected to a second soil inlet channel 422, and its peripheral wall is connected to a second soil delivery channel 423. A second throwing wheel 421 is provided in the second throwing cavity 42 for accelerating the incoming soil for 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 soil ejected by the second soil throwing wheel 421 toward the fire. The output end of the first soil spraying pipe 43 is lower than the output end of the second soil spraying pipe 45, creating two high and low ejection points to meet firefighting needs at different distances and heights.

[0052] A soil delivery branch channel 44 is connected between the second soil feeding channel 422 and the first soil delivery channel 413. This means that soil ejected from the first soil ejection cavity 41 can selectively enter the second soil feeding channel 422 connected to the second soil ejection cavity 42 through the soil delivery branch channel 44, and then be accelerated by the second soil ejection wheel 421 and ejected from the second soil injection 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 hingedly connected to the first soil delivery channel 413 and a first power mechanism 32 drivingly connected to the guide plate 31. By controlling the angle of the guide plate 31, the direction of soil ejected from the first soil ejection cavity 41 can be varied. The first power mechanism 32 includes a transmission rod connected to the guide plate 31 at one end, and the other end hingedly connected to the movable end of a driver, which can be an electric push rod or a hydraulic cylinder, rotatably mounted on the first soil delivery channel 413.

[0054] Through the switching mechanism, the first soil throwing cavity 41 can be directly connected to the first soil spraying pipe 43, and the soil is sprayed out by the first soil spraying pipe 43; or the first soil throwing cavity 41 can be connected to the soil feeding branch channel 44, and the soil is guided to the soil feeding branch channel 44, enters the second soil throwing cavity 42, and is then sprayed out by the second soil spraying pipe 45.

[0055] The first and second soil injection pipes 43 and 45 are each equipped with a first blocking mechanism and a second blocking mechanism, respectively, for opening or closing the corresponding soil injection pipe when needed. Each blocking mechanism preferably includes a gate 451 and a second power mechanism drivingly connected to the gate 451 (given that the structure and principle of the second power mechanism are identical or similar to those of the first power mechanism, they will not be described in detail here), which can quickly cut off or start the ejection of soil.

[0056] The peripheral wall of the second soil throwing cavity 42 may also be connected to an air supply channel 424, which is connected to the first soil throwing pipe 43. A first blocking mechanism is provided at the air supply channel 424, for example, it is composed of a windshield 425 and a first actuating mechanism that drives it to slide. Specifically, the first actuating mechanism is used to drive the windshield 425 to move in a straight line, which can be a hydraulic / pneumatic push rod mechanism, or a connecting rod / gear mechanism driven by a motor. Since the above-mentioned mechanism is well known to those skilled in the art, it will not be described here. When necessary, the first blocking mechanism opens the air supply channel 424, and the second soil throwing wheel 421 rotates to generate a high-speed airflow. The airflow enters the first soil throwing pipe 43 through the air supply channel 424, thereby increasing the movement speed of the soil in 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 ejection cavity 42 is connected to a repulsion channel 426. The ejection line of the second ejection wheel 421 (i.e., the direction of the soil movement caused by its rotation) is designed to pass through this repulsion channel 426 and intersect with the ejection line of the first ejection wheel 411 within the first soil delivery channel 413. A second blocking mechanism is provided at the repulsion channel 426, for example, consisting of a retaining plate 427 and a second actuator that drives the retaining plate (given that the structure and principle of the second actuator are identical or similar to those of the first actuator, a detailed description thereof will not be repeated here).

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

[0059] During operation, the second blocking mechanism opens the counter-attack channel 426. The first throwing wheel 411 rotates in a clockwise direction (or other preset direction), and the second throwing wheel 421 also rotates in a clockwise direction (or other preset direction, the key is that its throwing line can act on the material in the first soil feeding channel 413 through the counter-attack channel 426).

[0060] The first ejection wheel 411 rotates at high speed, ejecting the soil input from the first soil feeding channel 412 upward along the first soil feeding channel 413, and finally passing through the back-moving channel 426 into the second ejection cavity 42. At the same time, the second ejection wheel 421 also rotates at high speed, ejecting the soil downward along the first soil feeding channel 413 through the back-moving channel 426, and forming an impact collision with the upward-moving soil.

[0061] Inside the first soil-feeding channel 413, soil ejected upward by the first ejection wheel 411 and soil ejected downward by the second ejection wheel 421 collide violently, multi-directionally, and at high speed. Furthermore, this collision changes the direction of movement of some soil, triggering subsequent repeated collisions. For example, soil may be ejected downward back toward the lower portion of the first soil-feeding channel 413 or the upper portion of the first ejection cavity 41, where it may collide again with soil moving upward.

[0062] Through this continuous, violent, multi-directional, high-speed collision, large or sticky soil lumps can be effectively crushed into small and uniform soil particles.

[0063] Following the above, as attached Figure 6 and 7 As shown, since the structure of the second throwing cavity 42 does not completely cover the soil-passing cross-section of the first soil-feeding channel 413, when the first throwing wheel 411 rotates, some of the crushed or uncrushed soil is driven by the first throwing wheel 411 into the first soil-spraying pipe 43. In addition, since there is a gap between the wheel blades of the second throwing wheel 421, when the second throwing wheel 421 rotates, some of the crushed or uncrushed soil is driven by the second throwing wheel 421 through the second soil-feeding channel 423 and into the second soil-spraying pipe 45. A first blocking mechanism and a second blocking mechanism are respectively provided in the first soil-spraying pipe 43 and the second soil-spraying pipe 45. At this time, if the first soil injection pipe 43 is closed by the first blocking mechanism, some of the crushed or uncrushed soil materials that have entered therein cannot be ejected from the first soil injection pipe 43, but fall back into the first soil ejection cavity 41 under the action of gravity; similarly, if the second soil injection pipe 45 is closed by the second blocking mechanism, some of the crushed or uncrushed soil materials that have entered therein cannot be ejected from the second soil injection pipe 45, but fall back into the second soil ejection cavity 42 under the action of gravity.

[0064] This crushing effect greatly improves the adaptability to different soil types, ensuring smooth throwing and uniform fire extinguishing coverage.

[0065] During operation, the fire truck approaches the edge of a fire. The operator drives the 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. As the vehicle slowly moves forward, the loosening plow 22 breaks up the ground, and the soil delivery shovel 23 collects the soil and delivers it to the lifting conveyor 24. The soil is then fed into the first soil inlet channel 412 of the throwing device 40 via the auger 25.

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

[0067] The scattered earth covers the burning material, suffocating, cooling, and isolating it, effectively extinguishing the fire. Because it uses locally sourced earth, it avoids the difficulty of transporting water, making it particularly suitable for areas with limited water resources and for thoroughly clearing residual fires and preventing them from rekindling.

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

[0069] 1. Throwing soil at high altitude and low speed:

[0070] like Figure 3As shown, the first and second throwing wheels 411, 421 are both rotating, the switching mechanism 3 connects the first throwing chamber 41 with the soil delivery branch channel, and the second blocking mechanism opens the second soil injection pipe 45. Soil enters the first throwing chamber 41 through the first soil inlet channel 412. Driven by the first throwing wheel 411, it passes through the soil delivery branch channel 44 and the second soil inlet channel 422, then into the second throwing chamber 42. Finally, driven by the second throwing wheel 421, the soil is ejected from the second soil injection pipe 45 through the second soil delivery channel 423.

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

[0072] This mode enables long-distance firefighting, such as extinguishing ground fires or fire lines far from fire trucks. It can also be used to throw soil onto burning treetops to cover and cool them. It can also be used to create firebreaks by pre-spreading soil at a distance, creating long-distance isolation zones.

[0073] 2. Throwing soil at low speed at low altitude:

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

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

[0076] This mode allows for close-range firefighting, precisely covering ground and open flames close to the fire truck. It can also handle residual fires, such as smoldering tree stumps, fallen trees, and thick layers of humus, to suffocate and prevent re-ignition.

[0077] 3. Throwing soil at low speed:

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

[0079] Specifically, the first throwing wheel 411 rotates clockwise; and the second throwing 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.

[0081] This mode can quickly and forcefully drop a large amount of soil onto the most intense fire area, impacting the flames and quickly suppressing the fire head. The high-speed soil flow penetrates the surface of the burning material and covers the internal fire points. Furthermore, in certain wind conditions, the accuracy of soil throwing at close range can be guaranteed.

[0082] 4. Throwing soil at low speed and low altitude with crushing 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 cavity 41 with the first soil injection pipe 43, the first blocking mechanism closes the air supply channel 424, the second blocking mechanism opens the backlash channel 426, the first blocking mechanism opens the first soil injection pipe 43, and the second blocking mechanism closes the second soil injection pipe 45. During the rotation of the first throwing wheel 411, it ejects the soil input from the first soil feed channel 412 upward along the first soil delivery channel 413. Part of the soil can pass through the backlash channel 426 and enter the second throwing cavity 42. The rotating second throwing wheel 421 ejects part of the soil entering the second throwing cavity 42 downward along the first soil delivery channel 413 through the backlash channel 426, forming a counter-collision with the upward-moving soil, thereby achieving soil crushing.

[0084] Next, since the structure of the second throwing cavity 42 fails to completely cover the soil-passing cross-section of the first soil-feeding channel 413, when the first throwing wheel 411 rotates, part of the soil will not enter the counterattack channel 426, but will enter the first soil-spraying pipe 43 driven by the first throwing wheel 411, and will eventually be sprayed out from the first soil-spraying pipe 43.

[0085] It should be noted that in this embodiment, the counter-attack channel 426 is connected to the side of the first soil-feeding channel 413 away from the first throwing wheel 411. As is well known, large or cohesive soil clumps have a higher mass, while small, uniform soil particles have a lower mass. According to the principle of centrifugal separation, when these soil particles are driven by the first throwing wheel 421, large or cohesive soil clumps are more likely to move along the side of the first soil-feeding channel 413 away from the first throwing wheel 421, thereby entering the second throwing chamber 42 through the counter-attack channel 426. Meanwhile, small, uniform soil particles are more likely to move along the side of the first soil-feeding channel 413 closer to the first throwing wheel 421, thereby entering the first injection pipe 43 and ultimately being ejected from the first injection pipe 43.

[0086] Specifically, the first throwing wheel 411 rotates clockwise; the second throwing wheel 421 rotates clockwise.

[0087] When the excavated soil is of poor quality, containing many rocks, grass roots, or large clods, this mode is used for pre-treatment to improve the uniformity of the extinguishing medium. It also provides a finer coverage effect, using finer soil to cover the remaining fire, especially sparks in crevices, for a better suffocation effect. It can also be used to treat stubborn, smoldering fires close to the fire that require finer soil coverage.

[0088] 5. Throwing soil at high altitude and low speed with crushing 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 cavity 41 with the first soil injection pipe 43, the first blocking mechanism closes the air supply channel 424, the second blocking mechanism opens the back-rebound channel 426, the first blocking mechanism closes the first soil injection pipe 43, and the second blocking mechanism opens the second soil injection pipe 45. During the rotation of the first throwing wheel 411, it ejects the soil input from the first soil feed channel 412 upward along the first soil feed channel 413. Part of the soil can pass through the back-rebound channel 426 and enter the second throwing cavity 42. The rotating second throwing wheel 421 ejects part of the soil that has entered the second throwing cavity 42 downward along the first soil feed channel 413 through the back-rebound channel 426, forming a counter-collision with the upward-moving soil, thereby achieving soil crushing.

[0090] Then, in view of the spacing between the wheel blades of the second throwing wheel 421, when the second throwing wheel 421 rotates, part of the soil in the second throwing cavity will be driven by the second throwing wheel 421, enter the second soil feeding channel 423 into the second soil injection pipe 45, and finally be ejected from the second soil injection pipe 43.

[0091] It should be noted that large or cohesive clumps of soil have a greater mass and are subject to a greater gravitational force, while small, uniform soil particles have a smaller mass and are subject to a smaller gravitational force. Based on the principles of centrifugal separation and force synthesis, when these soil particles are driven by the second ejector wheel 421, large or cohesive clumps of soil have a greater tendency to fall downward, more easily moving through the back-moving channel 426. Small, uniform soil particles, on the other hand, have a lesser tendency to fall downward, more easily moving upward along the second soil delivery channel 423, ultimately being ejected from the first ejector pipe 43.

[0092] Specifically, the first throwing wheel 411 rotates clockwise; the second throwing wheel 421 rotates clockwise.

[0093] This mode can spread the crushed fine soil to the distant afterburning area or tree base. It can be used to treat fire spots at higher locations (such as the upper part of bushes and higher tree bases) that require fine soil to effectively cover, cross obstacles, and cover the target area with the processed fine soil.

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

[0095] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A forest fire truck, comprising a crawler chassis, wherein the crawler chassis is provided with a throwing device, characterized in that: The throwing device includes a first throwing cavity and a second throwing cavity arranged from bottom to top, wherein a first throwing wheel and a second throwing wheel are respectively provided in the first throwing cavity and the second throwing cavity; The end wall and the peripheral wall of the first soil throwing cavity are respectively connected to a first soil feeding channel and a first soil delivery channel, and the end wall and the peripheral wall of the second soil throwing cavity are respectively connected to a second soil feeding channel and a second soil delivery channel; The first soil delivery channel is connected to a first soil injection pipe, a soil delivery branch channel is connected between the second soil feed channel and the first soil delivery channel, the second soil delivery channel is connected to a second soil injection pipe, and an output end of the first soil injection pipe is lower than an output end of the second soil injection pipe; A switching mechanism is provided in the first soil delivery channel, and the switching mechanism can connect the first soil throwing cavity with the first soil injection pipe, or connect the first soil throwing cavity with the soil delivery branch channel.

2. A forest fire truck according to claim 1, characterized in that: The switching mechanism includes a guide plate hinged to the first soil feeding channel, and a first power mechanism drivingly connected to the guide plate.

3. A forest fire truck according to claim 1, characterized in that: The peripheral wall of the second soil-throwing cavity is connected with an air supply channel, and the air supply channel is communicated with the first soil-spraying pipe. A first blocking mechanism is provided at the air supply channel, and the first blocking mechanism can open or close the air supply channel.

4. A forest fire truck according to claim 3, characterized in that: The first blocking mechanism includes a windshield plate slidably connected to the second soil throwing cavity, and a first actuating mechanism drivingly connected to the windshield plate.

5. A forest fire fighting vehicle according to claim 3, characterized in that: The peripheral wall of the second soil throwing cavity is connected to a counterattack channel, and the throwing line of the second soil throwing wheel passes through the counterattack channel and intersects with the throwing line of the first soil throwing wheel in the first soil feeding channel; A second blocking mechanism is provided at the counterattack channel, and the second blocking mechanism can open or close the counterattack channel.

6. A forest fire fighting vehicle according to claim 5, characterized in that: The second blocking mechanism includes a soil retaining plate slidably connected to the second soil throwing cavity, and a second actuating mechanism drivingly connected to the soil retaining plate.

7. A forest fire fighting vehicle according to claim 1, characterized in that: A first blocking mechanism and a second blocking mechanism are respectively provided in the first soil spraying pipe and the second soil spraying pipe. The first blocking mechanism is used to open or close the first soil spraying pipe, and the second blocking mechanism is used to open or close the second soil spraying pipe.

8. A forest fire fighting vehicle according to claim 7, characterized in that: The first blocking mechanism and the second blocking mechanism both include a gate plate and a second power mechanism drivingly connected to the gate plate.

9. A forest fire fighting vehicle according to claim 1, characterized in that: A soil transport device is also provided on the crawler chassis, which includes a lifting frame hinged to the crawler chassis. The lifting frame is movably connected to the crawler chassis through a lifting hydraulic cylinder. A loosening plow and a soil feeding shovel are sequentially connected to the lifting frame along the travel direction of the crawler chassis.

10. A forest fire fighting vehicle according to claim 9, characterized in that: The soil transport device also includes a lifting conveyor belt and an auger connected to the soil feeding shovel in sequence, and the output end of the auger is connected to the first soil feeding channel.

Images