Sand throwing equipment

Abstract

The utility model discloses sand throwing equipment which comprises a base plate and a sand throwing device, the base plate is provided with the sand throwing device, the sand throwing device comprises a sand throwing machine used for throwing out sand grains, the sand throwing device further comprises a sand conveying machine, the sand conveying machine is provided with a sand outlet pipe, and a sand outlet of the sand outlet pipe is detachably connected with a sand inlet of the sand throwing machine. The sand conveyor can take sand from any available sand source, and is not limited to vehicle-mounted storage, so that the equipment can be more flexibly deployed at any place with an external sand source, the flexibility and maneuverability of fire extinguishing operation are improved, and the fire extinguishing response time is shortened. The chassis can run without carrying a large amount of sand grains, the load of the chassis is reduced, fuel is saved, and the operation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency rescue, in particular to a sand throwing device. Background Art

[0002] Currently, in the face of special fire situations where it is not suitable to use traditional fire extinguishing media such as water, foam or carbon dioxide, large sand throwing fire trucks are generally adopted as a response strategy in the fire protection field. Such innovative vehicles directly intervene in the fire source by efficiently throwing sand, not only greatly enhancing the fire extinguishing efficiency, but also significantly reducing the direct risk exposure of firefighters in high-risk environments, thus building a solid defense line for protecting people's lives and property and maintaining social stability.

[0003] Chinese Patent with the application publication number CN109806528A discloses an independent power sand throwing fire extinguishing device, which includes a sand box assembly and a throwing system; the sand box assembly includes a cargo box for storing sand materials, a feeding bottom plate arranged at the bottom of the cargo box for conveying sand materials to the feeding auger, and a feeding auger for screwing the sand materials into the throwing system; the throwing system includes a throwing impeller that can rotate and throw sand materials outward.

[0004] The above patent has the following technical problems: Although this large cargo box can store a large amount of sand materials, it also occupies a large storage space, resulting in a very large volume of the entire sand throwing fire extinguishing device. Content of the Utility Model

[0005] Therefore, it is necessary to provide a sand throwing device to solve the problem that although the cargo box of the existing sand throwing fire extinguishing device can store a large amount of sand materials, it also occupies a large storage space, resulting in a large volume of the entire sand throwing fire extinguishing device.

[0006] To achieve the above purpose, this embodiment provides a sand throwing device, which includes a chassis and a sand throwing device. The sand throwing device is arranged on the chassis. The sand throwing device includes a sand thrower for throwing sand grains. The sand throwing device further includes a sand conveyor. The sand conveyor is provided with a sand outlet pipe, and the sand outlet of the sand outlet pipe is detachably connected to the sand inlet of the sand thrower.

[0007] Furthermore, the sand outlet pipe is connected to the sand inlet of the sand thrower through a clamping mechanism.

[0008] Furthermore, the clamping mechanism includes a clamping groove member arranged on the outer wall of the sand outlet pipe. The sand thrower includes a housing and a sand guiding groove. The housing is provided with the sand guiding groove. The sand guiding groove surrounds the sand inlet of the housing. The upper part of the sand guiding groove is open. The sand guiding groove and the sand inlet of the housing form the sand inlet of the sand thrower. The clamping groove member is stuck on the open edge of the sand guiding groove. The sand guiding groove is used to receive the sand grains sent out from the sand outlet of the sand conveyor and guide them into the sand inlet of the housing.

[0009] Further, the end of the sand outlet pipe is a U-shaped structure, the sand outlet of the sand outlet pipe faces downward and is aligned with the lower sand guide groove, and the clamping groove member is located obliquely below the sand outlet of the sand outlet pipe.

[0010] Further, the clamping groove member includes a first clamping plate and a second clamping plate which are arranged at intervals. The second clamping plate is located in the direction of the center of the sand outlet of the sand outlet pipe towards the first clamping plate. The lower end of the second clamping plate is bent towards the center of the sand outlet of the sand outlet pipe, or the lower end of the first clamping plate is bent away from the center of the sand outlet of the sand outlet pipe.

[0011] Further, the sand conveyor includes a fixed seat, a sand inlet pipe, a sand conveying motor, a first spiral blade and a second spiral blade. The fixed seat is provided with a cavity. The inlet and outlet of the cavity are respectively connected with the sand outlet pipe and the sand inlet pipe. The first spiral blade and the second spiral blade are respectively arranged in the cavity through bearing seats. The first spiral blade extends into the sand inlet pipe, and the second spiral blade extends into the sand outlet pipe. The sand conveying motor is arranged on the fixed seat and is used to drive the first spiral blade and the second spiral blade to rotate.

[0012] Further, the sand inlet pipe and the sand outlet pipe are flexible hoses, and the first spiral blade and the second spiral blade are flexible shaftless spiral blades.

[0013] Further, the sand conveying motor is a double-shaft motor with two output shafts, and the two output shafts are respectively in transmission connection with the first spiral blade and the second spiral blade; or:

[0014] The sand conveying motor includes a first motor and a second motor. The first motor and the second motor are both arranged on the fixed seat. The first motor is connected with the first spiral blade, and the second motor is connected with the second spiral blade.

[0015] Further, a power device is further included. The power device is respectively connected with the sand conveying motor and the sand throwing machine and is used to provide power for the sand conveying motor and the sand throwing machine.

[0016] Further, the power unit includes an engine, a hydraulic system and a generator. The engine is connected to the hydraulic system. The hydraulic system includes a hydraulic oil pump, a hydraulic oil circuit, a first hydraulic motor and a second hydraulic motor. The engine is connected to the hydraulic oil pump. The hydraulic oil pump is connected to the first hydraulic motor and the second hydraulic motor respectively through the hydraulic oil circuit. The first hydraulic motor is connected to the impeller shaft of the sand throwing machine. The second hydraulic motor is connected to the generator. The generator is connected to the sand conveying motor respectively. The sand conveying motor is an electrically driven motor.

[0017] Further, the engine, the hydraulic system and the generator are arranged on the chassis. The engine is located in the middle of the chassis. The generator is located on the left or right side of the chassis.

[0018] Different from the prior art, the above technical solution has the following beneficial effects:

[0019] The sand conveyor can take sand from any available sand source, no longer limited to on-vehicle storage. This means that the device can be deployed more flexibly in any place with an external sand source, improving the flexibility and mobility of the fire extinguishing operation and shortening the fire extinguishing response time. The chassis does not need to carry a large amount of sand for driving, reducing the load of the chassis, thus saving fuel and reducing the operation cost. Description of the Drawings

[0020] Figure 1 Is a perspective view of the chassis equipped with a sand throwing device and a power unit in this embodiment;

[0021] Figure 2 Is a cross-sectional view of the sand conveyor in this embodiment;

[0022] Figure 3 Is a cross-sectional view of the sand outlet pipe connected to the sand inlet of the sand throwing machine through a clamping mechanism in this embodiment;

[0023] Figure 4 Is Figure 3 An enlarged view of part A in;

[0024] Figure 5 Is a perspective view of the sand throwing machine in this embodiment.

[0025] Description of the Reference Numerals:

[0026] 1. Sand throwing device; 11. Sand throwing machine; 111. Housing; 112. Sand guiding groove; 113. Sand inlet;

[0027] 2. Chassis;

[0028] 3. Sand conveyor; 31. Inlet sand pipe; 32. Outlet sand pipe; 321. Outlet sand opening; 322. U-shaped structure; 33. Fixed seat; 34. First spiral blade; 35. Second spiral blade; 36. Biaxial motor; 361. Output shaft;

[0029] 4. Clamping mechanism; 41. Groove member; 411. First clamping plate; 412. Second clamping plate;

[0030] 5. Power device; 51. Engine; 52. Generator; 53. First hydraulic motor; 54. Second hydraulic motor. Detailed implementation manners

[0031] To describe in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects of this application, etc., the following is a detailed description in conjunction with the listed specific embodiments and with reference to the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0032] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the meanings of the technical terms used in this article are the same as those generally understood by those skilled in the technical field to which this application belongs; the use of relevant terms in this article is only for describing specific embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships, for example, A and / or B, which means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects before and after.

[0035] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary-secondary or order relationship, etc. between these entities or operations.

[0036] Without further limitations, in this application, the terms "including", "comprising", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product that includes the said elements. Thus, a process, method or product that includes a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or elements inherent to such process, method or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceeding" are understood to not include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0038] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiment or the drawings. This is only for the convenience of describing the specific embodiments of this application or for the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of this application.

[0039] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the said "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which this application pertains, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0040] Please refer to Figures 1 to 5, this embodiment provides a sand throwing device, including a chassis 2 and a sand throwing device 1. The sand throwing device 1 is provided on the chassis 2. The sand throwing device 1 includes a sand thrower 11 for throwing sand grains. The sand throwing device 1 further includes a sand conveyor 3. The sand conveyor 3 is provided with a sand outlet pipe 32. The sand outlet 321 of the sand outlet pipe 32 is detachably connected to the sand inlet 113 of the sand thrower 11.

[0041] Please refer to Figure 5 , the sand thrower 11 is used to generate an air flow to drive the movement of sand grains. The sand thrower 11 can be a vane type sand thrower 11, including a housing 111 and an impeller. The housing 111 is the main support structure of the sand thrower 11 and is usually made of high-strength metal materials such as cast iron, steel plate or aluminum alloy to ensure its strength and durability. The shape and design of the housing 111 will vary according to the type and application scenario of the sand thrower 11. There is a cavity inside the housing 111, and the cavity is communicated with the outside through the sand outlet and the sand inlet so that air or sand grains can smoothly enter and leave the sand thrower 11. An impeller is provided in the cavity, and the shaft of the impeller is connected to a motor. The impeller can rotate at a high speed. Materials such as sand grains enter through the sand inlet and are gradually accelerated to a higher speed under the push of the blades and are thrown out at a high speed under the action of high-speed centrifugal force.

[0042] Please refer to Figures 2 to 4 , the sand grains are loaded through an external sand conveyor 3. The sand conveyor 3 has the ability to suck sand grains from an external sand source (such as a sandbag or a sand pile on one side of the chassis 2). The sand outlet pipe 32 configured on the sand conveyor 3 is detachably connected to the sand inlet 113 of the sand thrower 11, which is convenient for quick assembly and maintenance.

[0043] Please refer to Figures 2 to 4 , the sand conveyor 3 can take sand from any available sand source, no longer limited to on-vehicle storage. This means that the device can be more flexibly deployed anywhere with an external sand source, improving the flexibility and mobility of fire extinguishing operations and shortening the fire extinguishing response time. The chassis 2 does not need to carry a large amount of sand grains when driving, reducing the load of the chassis 2, thereby saving fuel and reducing operating costs.

[0044] In this embodiment, a position for placing the sand conveyor 3 can be provided on the chassis 2 for installing the sand conveyor 3. This design makes the sand conveyor 3 an integrated part of the sand throwing device. In some embodiments, the sand conveyor 3 can be directly placed on the ground, which increases the flexibility of use, especially when the space of the chassis 2 is limited or when operating in complex terrains.

[0045] Please refer to Figures 2 to 4, in this embodiment, the sand outlet pipe 32 is connected to the sand inlet 113 of the sand thrower 11 through a clamping mechanism 4. The function of the clamping mechanism 4 is to provide a fast, reliable and easy-to-operate connection method, so that the sand outlet pipe 32 can be easily installed on or disassembled from the sand thrower 11, facilitating maintenance and replacement.

[0046] Please refer to Figure 3 and Figure 4 , in this embodiment, the clamping mechanism 4 includes a clamping groove member 41 provided on the outer wall of the sand outlet pipe 32. The sand thrower 11 includes a housing 111 and a sand guiding groove 112. The sand guiding groove 112 is provided on the housing 111. The sand guiding groove 112 surrounds the sand inlet of the housing 111. The upper part of the sand guiding groove 112 is open. The sand guiding groove 112 and the sand inlet of the housing 111 together form the sand inlet 113 of the sand thrower 11. The clamping groove member 41 is stuck on the open edge of the sand guiding groove 112. The sand guiding groove 112 is used to receive the sand grains sent out from the sand outlet 321 of the sand conveyor 3 and guide them into the sand inlet of the housing 111.

[0047] By aligning the clamping groove member 41 of the sand outlet pipe 32 with the open sand guiding groove 112 on the housing 111 of the sand thrower 11 and through a simple pushing operation, the side wall of the open part is inserted into the clamping groove of the clamping groove member 41 and fits tightly to achieve the physical locking of the two components. At this time, the sand outlet 321 of the sand outlet pipe 32 of the sand conveyor 3 is aligned with or extends into the open sand guiding groove 112, so that the conveyed sand grains can enter the sand guiding groove 112. The sand inlet of the housing 111 is located on the side of the sand guiding groove 112. The sand grains enter from the upper open part of the sand guiding groove 112, first move downward to the bottom, and then turn into the sand inlet of the housing 111 for being thrown by the sand thrower 11. If the sand outlet pipe 32 needs to be removed, just push up the clamping groove member 41 to separate it from the sand guiding groove 112. This design makes the installation and disassembly of the sand outlet pipe 32 extremely simple, reduces the operation difficulty, and can respond quickly especially in the case of emergency fire extinguishing, reducing the preparation time.

[0048] Please refer to Figure 3 , in this embodiment, the end of the sand outlet pipe 32 is a U-shaped structure 322. The sand outlet 321 of the sand outlet pipe 32 faces downward and is aligned with the sand guiding groove 112 below, reducing the deviation of the sand grains during the falling process. The clamping groove member 41 is located obliquely below the sand outlet 321 of the sand outlet pipe 32, avoiding the path of the falling sand grains.

[0049] Please refer to Figure 4, in this embodiment, the card slot member 41 includes a first card board 411 and a second card board 412 which are arranged at intervals. A card slot is formed between the first card board 411 and the second card board 412. The second card board 412 is located in the direction of the center of the sand outlet 321 of the sand outlet pipe 32 facing the first card board 411. The opposite side walls of the first card board 411 and the second card board 412 are in contact with the side walls of the sand guide groove 112 to achieve clamping. The lower end of the second card board 412 is bent towards the center of the sand outlet 321 of the sand outlet pipe 32, or the lower end of the first card board 411 is bent towards the direction away from the center of the sand outlet 321 of the sand outlet pipe 32. The bending design provides a wider docking surface. Figure 4 As shown, the first card board 411 is vertical, and the lower end of the second card board 412 is bent towards the center of the sand outlet 321 of the sand outlet pipe 32. The width between the lower ends of the first card board 411 and the second card board 412 is large, so that the operator can intuitively align the position during installation, quickly complete the clamping, and improve the assembly efficiency and the simplicity of operation.

[0050] In some embodiments, the sand outlet 321 of the sand outlet pipe 32 and the sand inlet of the sand throwing machine 11 are connected by various detachable connection fittings such as flange plates and fire fighting joints.

[0051] Please refer to Figure 2 , in this embodiment, the sand conveyor 3 includes a fixed seat 33, a sand inlet pipe 31, a sand conveying motor, a first spiral blade 34 and a second spiral blade 35. The fixed seat 33 is provided with a cavity. The inlet and outlet of the cavity are respectively connected with a sand outlet pipe 32 and a sand inlet pipe 31. The first spiral blade 34 and the second spiral blade 35 are respectively arranged in the cavity through bearing seats. The first spiral blade 34 extends into the sand inlet pipe 31, and the second spiral blade 35 extends into the sand outlet pipe 32. The sand conveying motor is arranged on the fixed seat 33 and is used to drive the first spiral blade 34 and the second spiral blade 35 to rotate.

[0052] Please refer to Figure 2 , in this embodiment, the sand conveying motor is a double-shaft motor 36 with two output shafts 361. The two output shafts 361 are respectively in transmission connection with the first spiral blade 34 and the second spiral blade 35, and then drive the first spiral blade 34 and the second spiral blade 35 to rotate to transport sand grains.

[0053] In some embodiments, the sand conveying motor includes a first motor and a second motor. The first motor and the second motor are both arranged on the fixed seat 33. The first motor is connected with the first spiral blade 34, and the second motor is connected with the second spiral blade 35, that is, the first motor drives the first spiral blade 34 to rotate, and the second motor drives the second spiral blade 35 to rotate.

[0054] A cavity is provided inside the fixing seat 33. The cavity is designed with an inlet connected to the sand inlet pipe 31 for receiving external sand, and an outlet connected to the sand outlet pipe 32 to output sand to the sand inlet of the sand throwing machine 11. This layout forms a continuous sand conveying channel. The first motor and the second motor drive the first spiral blade 34 and the second spiral blade 35 respectively. The two motors work synchronously to ensure the continuous and efficient transmission of sand from the inlet to the outlet in the cavity. The first spiral blade 34 is installed in the sand inlet pipe 31 and pushes the sand into the cavity by rotation. The second spiral blade 35 is located in the sand outlet pipe 32 to push the sand out of the cavity, ensuring a continuous flow of sand. The first spiral blade 34 and the second spiral blade 35 are fixed in the cavity through the bearing seat, which ensures their stability and durability when rotating at high speed. The ingenious extension design of the two sets of blades ensures that the flow of sand in the cavity is smooth and efficient, reducing the possibility of blockage.

[0055] See also Figure 2 In this embodiment, the sand inlet pipe 31 and the sand outlet pipe 32 are hoses, and the first spiral blade 34 and the second spiral blade 35 are bendable shaftless spiral blades.

[0056] The design of the hose allows the pipe to be easily bent and folded, making it easy to lay in complex terrain and bypass obstacles. The flexibility of the hose can also absorb vibrations during sand transportation to a certain extent and reduce mechanical wear. A shaftless spiral blade refers to a spiral blade without a central axis design, which simplifies the structure, reduces wear due to the axis, and reduces the amount of sand remaining on the spiral blade. At this time, the root of the spiral blade (first spiral blade 34, second spiral blade 35) is arranged on the bearing seat and is connected to the motor (first motor, second motor) in transmission. Bendable means that the spiral blade can be bent according to the use status, and the material of the spiral blade can be spring steel.

[0057] When working, the sand outlet pipe 32 and the sand inlet pipe 31 are unfolded and aimed at their respective working objects. When not working, the sand outlet pipe 32 and the sand inlet pipe 31 that were originally extended are bent and stored, which significantly reduces the space occupied by the entire device. It can be transported by sand throwing equipment or other carriers.

[0058] In some embodiments, the sand inlet pipe 31 and the sand outlet pipe 32 are hard pipes, and the first spiral blade 34 and the second spiral blade 35 are shaftless spiral blades or shafted spiral blades.

[0059] In this embodiment, the first motor and the second motor are arranged outside the cavity, and are respectively connected to the first spiral blade 34 and the second spiral blade 35 through a variable speed transmission structure such as a belt, a chain, a gear or a chain.

[0060] See also Figure 1, in this embodiment, the sand throwing device further includes a power device 5. The power device 5 is respectively connected to the sand conveying motor (the first motor / the second motor / the dual-axis motor) and the sand thrower 11, and is used to provide power for the first motor, the second motor, the sand thrower 11, and the chassis 2.

[0061] The power device 5 intelligently adjusts according to the operation requirements of the device or according to a preset distribution strategy, and provides necessary power for the first motor and the second motor to drive them to rotate, so as to drive the spiral blades to input and output sand grains. At the same time, it supplies energy to the sand thrower 11, and the sand thrower 11 generates sufficient air flow power to throw the sand grains at high speed. The moving power of the chassis 2 is also supplied by this device to ensure the mobility of the entire device.

[0062] Please refer to Figure 1 , in this embodiment, the power device 5 includes an engine 51, a hydraulic system and a generator 52. The engine 51 is connected to the hydraulic system. The hydraulic system includes a hydraulic oil pump, a hydraulic oil circuit, a first hydraulic motor 53 and a second hydraulic motor 54. The engine 51 is connected to the hydraulic oil pump, and the hydraulic oil pump is respectively connected to the first hydraulic motor 53 and the second hydraulic motor 54 through the hydraulic oil circuit. The first hydraulic motor 53 is connected to the impeller shaft of the sand thrower 11, and the second hydraulic motor 54 is connected to the generator 52. The generator 52 is respectively connected to the sand conveying motor (the first motor / the second motor / the dual-axis motor), and the sand conveying motor (the first motor / the second motor / the dual-axis motor) is an electrically driven motor (also called an electric motor).

[0063] The engine 51 serves as the main power source to drive the hydraulic pump to operate. The hydraulic pump transports pressurized hydraulic fluid to the first hydraulic motor 53 and the second hydraulic motor 54 through the hydraulic oil circuit, and these two respectively drive the impeller of the sand thrower 11 and the generator 52. The first hydraulic motor 53 is connected to the impeller shaft of the sand thrower 11, and through the power conversion of hydraulic pressure, it provides rotational power for the blades of the sand thrower 11 to generate high-pressure air flow for throwing sand grains. The second hydraulic motor 54 drives the generator 52 through the hydraulic system, and the generated electricity is supplied to the electrically driven motors of the sand conveyor 3. These two electrically driven motors respectively drive the spiral blades of the sand conveyor 3 to achieve efficient transmission of sand grains.

[0064] Among them, the electricity generated by the generator 52 is supplied to the electrically driven motors of the sand conveyor 3 to ensure precise operation under low-speed or fine control requirements, while the engine 51 and the hydraulic system provide sufficient energy under high-speed or high-power requirements. The two complement each other, improving the energy efficiency and flexibility of the system.

[0065] In this embodiment, the engine 51, the hydraulic system and the generator 52 are arranged on the chassis 2, or the engine 51 is arranged outside the chassis 2. Embodiment 1: The engine 51, the hydraulic system and the generator 52 are all integrally arranged on the chassis 2, and the structure is as Figure 1As shown in the figure. Embodiment 2: The engine 51 is arranged outside the chassis 2, while the hydraulic system and the generator 52 are still located on the chassis 2. This design takes into account the heat dissipation and maintenance convenience of the engine 51. By separating the engine 51, which may generate relatively high heat, from the chassis 2, the heat source can be managed more effectively.

[0066] Please refer to Figure 1 , in this embodiment, the chassis 2 is a hydraulic crawler chassis 2, and the power unit 5 provides power for the hydraulic crawler chassis 2. Specifically, the hydraulic system further includes a third hydraulic motor and a fourth hydraulic motor. The hydraulic oil pump is connected to the third hydraulic motor and the fourth hydraulic motor respectively through a hydraulic oil circuit. The third hydraulic motor and the fourth hydraulic motor drive the two crawlers of the crawler chassis 2 to operate. The hydraulic crawler chassis 2 can significantly improve the passing ability of the sand-throwing fire extinguisher on rough terrains, including wetlands, sandy lands, muddy areas, and uneven roads, expanding the applicable range, and is especially suitable for wildfire extinguishing needs. The hydraulic system also provides the hydraulic power required for the operation of the crawler chassis 2. The hydraulic oil pump is connected to the third hydraulic motor of the crawler chassis 2 through a hydraulic oil circuit.

[0067] The power unit 5 starts, first provides power for the chassis 2, so that the sand-throwing fire extinguisher quickly reaches the fire scene. Subsequently, the power unit 5 activates the sand conveyor 3 and the sand thrower 11. The sand conveyor 3 starts to suck sand grains from the external sand pile and transports them to the sand inlet 113 of the sand thrower 11 through the sand outlet pipe 32. The sand thrower 11 then uses the generated high-speed airflow to accelerate the sand grains and accurately scatter them into the flame area, effectively suppressing the fire until it goes out by relying on the covering and asphyxiating effects of the sand grains.

[0068] Please refer to Figure 1 , in this embodiment, the engine 51 is located in the middle of the chassis 2, the generator 52 is located on the left or right side of the chassis 2, and a fuel tank is provided on the right or left side of the chassis 2. The fuel tank can supply fuel to the engine 51. Preferably, the fuel tank and the generator 52 are placed on different sides of the chassis.

[0069] It should be noted that although the above-mentioned embodiments have been described in this article, the patent protection scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, any changes and modifications made to the embodiments described in this article, or equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, and directly or indirectly applying the above technical solutions to other related technical fields, are all included in the patent protection scope of the present invention.

Claims

1. A sand throwing device, comprising a chassis and a sand throwing device, wherein the sand throwing device is arranged on the chassis, and the sand throwing device includes a sand thrower for throwing sand grains, and is characterized in that, The sand throwing device also includes a sand conveyor, which is provided with a sand outlet pipe, and the sand outlet of the sand outlet pipe is detachably connected to the sand inlet of the sand throwing machine.

2. The sand throwing device according to claim 1, characterized in that The sand outlet pipe is connected to the sand inlet of the sand throwing machine through a clamping mechanism.

3. The sand throwing device according to claim 2, characterized in that, The clamping mechanism includes a clamping groove part arranged on the outer wall of the sand outlet pipe, and the sand slinger includes a shell and a sand guide groove. The shell is provided with the sand guide groove, and the sand guide groove surrounds the sand inlet of the shell. The upper part of the sand guide groove is open, and the sand guide groove and the sand inlet of the shell form the sand inlet of the sand slinger. The clamping groove part is clamped on the open edge of the sand guide groove, and the sand guide groove is used to receive the sand sent out from the sand outlet of the sand conveyor and introduce it into the sand inlet of the shell.

4. The sand throwing device according to claim 3, characterized in that, The end of the sand outlet pipe is a U-shaped structure, the sand outlet of the sand outlet pipe faces downward and is aligned with the sand guide groove below, and the clamping groove member is located obliquely below the sand outlet of the sand outlet pipe.

5. The sand throwing device according to claim 4, characterized in that, The slot member includes a first clamping plate and a second clamping plate which are spaced apart from each other. The second clamping plate is located in a direction from the first clamping plate toward the center of the sand outlet of the sand outlet pipe. The lower end of the second clamping plate is bent toward the center of the sand outlet of the sand outlet pipe, or the lower end of the first clamping plate is bent away from the center of the sand outlet of the sand outlet pipe.

6. The sand casting device according to claim 1, characterized in that, The sand conveyor includes a fixed seat, a sand inlet pipe, a sand conveying motor, a first spiral blade and a second spiral blade. The fixed seat is provided with a cavity. The inlet and outlet of the cavity are respectively connected to the sand outlet pipe and the sand inlet pipe. The first spiral blade and the second spiral blade are respectively arranged in the cavity through bearing seats. The first spiral blade extends into the sand inlet pipe, and the second spiral blade extends into the sand outlet pipe. The sand conveying motor is arranged on the fixed seat and is used to drive the first spiral blade and the second spiral blade to rotate.

7. The sand throwing device according to claim 6, characterized in that, The sand inlet pipe and the sand outlet pipe are hoses, and the first spiral blade and the second spiral blade are bendable shaftless spiral blades.

8. The sand throwing device according to claim 6, wherein The sand transport motor is a double-shaft motor with two output shafts, and the two output shafts are respectively connected to the first spiral blade and the second spiral blade in a transmission manner; or: The sand transport motor includes a first motor and a second motor, the first motor and the second motor are both arranged on the fixing seat, the first motor is connected to the first spiral blade, and the second motor is connected to the second spiral blade.

9. The sand throwing device according to claim 6 or 7 or 8, characterized in that, It also includes a power device, which is connected to the sand conveying motor and the sand slinger respectively and is used to provide power for the sand conveying motor and the sand slinger.

10. The sand throwing device according to claim 9, characterized in that, The power device includes an engine, a hydraulic system and a generator. The engine is connected to the hydraulic system. The hydraulic system includes a hydraulic oil pump, a hydraulic oil circuit, a first hydraulic motor and a second hydraulic motor. The engine is connected to the hydraulic oil pump. The hydraulic oil pump is respectively connected to the first hydraulic motor and the second hydraulic motor through the hydraulic oil circuit. The first hydraulic motor is connected to the impeller shaft of the sand slinger. The second hydraulic motor is connected to the generator. The generators are respectively connected to the sand transport motors. The sand transport motors are electrically driven motors.

11. The sand throwing device according to claim 10, characterized in that, The engine, the hydraulic system and the generator are provided on the chassis. The engine is located in the middle of the chassis, and the generator is located on the left or right side of the chassis.

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