Large flow three-phase jet flow fire fighting truck

Abstract

The application discloses a large-flow three-phase jet flow fire fighting vehicle, which comprises a vehicle body, a rotating table, a driving gas cylinder and a dry powder tank arranged on the vehicle body, a fire monitor connected to the rotating table through a lifting arm, and a discharge port arranged at one end of the dry powder tank, and further comprises an air inlet pipe, a feeding opening, a first switch valve and a second switch valve, wherein the sidewall of the feeding opening is connected with the air inlet pipe through a reflux pipe, the first switch valve is used for controlling the on-off connection between the feeding opening and the dry powder tank, and the second switch valve is used for controlling the on-off connection between the discharge port and the dry powder tank. In the application, nitrogen is filled in the initial stage, the dry powder tank is communicated with the feeding opening, and the dry powder tank is disconnected with the discharge port. Thus, after the nitrogen enters the dry powder tank, the nitrogen is mixed with the dry powder and flows back to the air inlet pipe from the reflux pipe to form a ring-shaped flow path. After the nitrogen in the dry powder tank reaches a specified pressure, the dry powder tank is disconnected with the feeding opening and connected with the discharge port, so that the dry powder extinguishing agent is supplied, and the problem that the dry powder extinguishing agent is not uniformly sprayed at the beginning of spraying is avoided.

Description

Technical Field

[0001] This invention relates to the field of fire truck technology, specifically to a high-flow three-phase jet fire truck. Background Technology

[0002] Three-phase jet fire truck is a high-altitude fire extinguishing equipment that can achieve single-phase jet spraying of one extinguishing agent, dual-phase jet spraying of two extinguishing agents simultaneously, or triple-phase jet spraying of three extinguishing agents simultaneously. It can select the appropriate fire extinguishing technology according to different fire objects and burning materials. It not only has an all-round and broad-spectrum fire extinguishing effect, but also has the advantages of low extinguishing agent dosage, fast fire extinguishing speed, and high efficiency.

[0003] Patent document CN222605294U discloses a high-flow-rate three-phase jet elevated fire truck, including a chassis and a sub-beam fixedly installed on the top of the chassis. Outriggers are fixedly installed at the bottom of the sub-beam, and a dry powder tank and a nitrogen tank are fixedly installed at the top of the sub-beam. The dry powder tank and the nitrogen tank are connected, and a dry powder reel is connected to one end of the dry powder tank. A main dry powder pipe is connected between the dry powder tank and the dry powder reel. This invention, in addition to using ultrafine dry powder for fire extinguishing via the nitrogen tank and dry powder pipe, integrates a high-power diesel engine and a medium-pressure centrifugal water pump. It not only meets the requirement of a 200L / s high-flow-rate anti-reignition extinguishing agent spray, but also allows for continuous extinguishing agent supply in conjunction with long-range water supply trucks, powder supply trucks, and liquid supply trucks. It also utilizes a long-range fire monitor for extinguishing oil tank fires, enabling the use of different extinguishing materials and extinguishing methods, thus increasing fire extinguishing performance and efficiency.

[0004] In the prior art of the aforementioned patent, one type of fire extinguishing material, dry powder, is loaded into a dry powder tank and mixed with nitrogen gas before being sprayed for fire extinguishing. However, the existing dry powder tank has a simple structure, and the nitrogen gas cannot be fully mixed with the dry powder in the initial stage of filling the dry powder tank. As a result, the dry powder extinguishing agent is sprayed unevenly at the beginning of the spray, which not only has a limited fire extinguishing effect but also causes serious waste. Therefore, there is an urgent need for a high-flow-rate three-phase jet fire truck to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a high-flow-rate three-phase jet fire truck to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-flow-rate three-phase jet fire truck includes a vehicle body with a turntable, a drive gas cylinder and a dry powder tank. A fire monitor is connected to the turntable via a lifting arm. The drive gas cylinder is connected to the dry powder tank, and one end of the dry powder tank has an outlet for connecting to the fire monitor. The truck also includes: an air inlet pipe located opposite the outlet on the dry powder tank; a feeding port located at the top of the dry powder tank, its side wall connected to the air inlet pipe via a return pipe; a first switching valve for controlling the connection between the feeding port and the dry powder tank; and a second switching valve for controlling the connection between the outlet and the dry powder tank.

[0008] Preferably, the first switching valve includes a valve plate rotatably disposed inside the feeding port, and a drive unit for controlling the rotation of the valve plate is disposed on the outer wall of the dry powder tank.

[0009] Preferably, the dry powder tank is provided with a partition to separate a storage area and a transition area. The storage area is connected to the air inlet pipe and the feeding port, while the transition area is connected to the discharge port. The second switch valve is provided on the partition.

[0010] Preferably, the second switching valve includes a plurality of first through holes circumferentially arranged on the edge of the partition, and an annular valve is rotatably arranged close to the side of the partition near the storage area. The annular valve has a plurality of second through holes circumferentially arranged on its surface. The rotation of the annular valve is linked to the rotation of the valve plate through a linkage component.

[0011] Preferably, the linkage assembly includes a linkage ring rotatably sleeved on the outside of the dry powder tank and a linkage shaft rotatably disposed on the outside of the dry powder tank. The rotating shaft of the valve plate is connected to the linkage ring via gear transmission, and the linkage shaft is connected to the linkage ring via gear transmission. An arc-shaped slider is fixedly connected to the annular valve, and the arc-shaped slider is connected to the linkage shaft via gear transmission.

[0012] Preferably, the outer wall of the dry powder tank is provided with a groove that matches the arc-shaped slider, and the annular valve is fixedly connected to the arc-shaped slider through a connector that moves through the side wall of the dry powder tank.

[0013] Preferably, a guide pipe is provided at the end of the dry powder tank away from the discharge port, the air inlet pipe is connected to the guide pipe, and a flow guiding component is provided inside the guide pipe to control the unidirectional flow of the air inlet pipe to the dry powder tank.

[0014] Preferably, the flow guiding assembly includes a sleeve coaxially rotatable inside the guiding tube, an impeller is provided on the outside of the sleeve, and a driving assembly for driving the sleeve to rotate is provided on the outside of the dry powder tank.

[0015] Preferably, a guide body is rotatably provided on the side of the partition near the transition zone. The space between the inner wall of the transition zone and the outer wall of the guide body is connected to each of the first through holes. Multiple guide vanes are provided on the circumference of the outer wall of the guide body. A shaft tube is rotatably provided inside the dry powder tank and is coaxially fixedly connected to the guide body. One end of the shaft tube rotatably passes through the sleeve and is provided with a clutch assembly. When the second switch valve is opened, the clutch assembly controls the shaft tube and the sleeve to rotate synchronously.

[0016] Preferably, the guide vanes are arranged in multiple circumferentially as a group, and multiple groups are provided. Adjacent groups of guide vanes overlap in the blade extension direction and are spaced apart.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This high-flow-rate three-phase jet fire truck connects the air inlet and the feed port via a return pipe. Under the control of the first and second switching valves, nitrogen is initially introduced into the dry powder tank. The dry powder tank is connected to the feed port but disconnected from the discharge port. As the nitrogen enters the dry powder tank, it mixes with the dry powder while flowing back into the air inlet through the return pipe, forming a loop. This allows the dry powder in the tank to flow with the nitrogen, improving the mixing effect. Once the dry powder tank is filled with nitrogen to the specified pressure, it is then disconnected from the feed port and connected to the discharge port to supply the dry powder extinguishing agent. This avoids the problem of uneven spraying of dry powder extinguishing agent at the beginning of the spray.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the external structure of the dry powder can of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the dry powder can of the present invention;

[0025] Figure 4This is a front view cross-sectional structural diagram of the dry powder can of the present invention;

[0026] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0027] Figure 6 This is a side view cross-sectional structural diagram of the dry powder can of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Vehicle body; 2. Turntable; 3. Drive gas cylinder; 4. Dry powder tank; 5. Lifting arm; 6. Fire monitor; 7. Discharge port; 8. Air inlet pipe; 9. Feeding port; 10. Return pipe; 11. Valve plate; 12. Drive unit; 13. Partition; 14. First through hole; 15. Annular valve; 16. Second through hole; 17. Linkage ring; 18. Linkage shaft; 19. Arc-shaped slider; 20. Slide groove; 21. Connecting piece; 22. Guide pipe; 23. Sleeve; 24. Impeller; 25. Guide body; 26. Guide vane; 27. Shaft tube; 28. Cover; 29. ​​Motor; 30. Drive wheel; 31. Driven wheel; 32. Telescopic rod; 33. Turntable; 34. Support. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0031] Please see Figure 1-6 This invention provides a high-flow-rate three-phase jet fire truck, comprising a vehicle body 1, a turntable 2 mounted on the vehicle body 1, a drive gas cylinder 3 and a dry powder tank 4, a fire monitor 6 connected to the turntable 2 via a lifting arm 5, the drive gas cylinder 3 connected to the dry powder tank 4, and an outlet 7 at one end of the dry powder tank 4 for connecting to the fire monitor 6. The truck also includes: an air inlet pipe 8 located opposite the outlet 7 on the dry powder tank 4; a feeding port 9 located at the upper end of the dry powder tank 4, its side wall connected to the air inlet pipe 8 via a return pipe 10; a first switching valve for controlling the connection between the feeding port 9 and the dry powder tank 4; and a second switching valve for controlling the connection between the outlet 7 and the dry powder tank 4.

[0032] Specifically, the vehicle body 1 carries the turntable 2, drive gas cylinder 3, dry powder tank 4, and related facilities. The vehicle body 1 integrates a support subframe, which is equipped with a hydraulic support system. The turntable 2 controls the overall rotation of the lifting arm 5. The lifting arm 5 includes folding and telescopic functions, and the fire monitor 6 can rotate at the end of the lifting arm 5 to adjust its pitch angle. The drive gas cylinder 3 consists of 16 80L nitrogen cylinders, cylinder valves, filling interfaces, high-pressure ball valves, etc., with a rated filling pressure of 15MPa. The parameters of the dry powder tank 4 include: capacity: 4000L; material: Q345R high-strength steel; design pressure: 1.7MPa; working pressure: 1.6MPa. The rotation axis of the dry powder tank 4 is horizontally set, and the discharge port 7 is set at one axial end of the dry powder tank 4; the discharge port 7 is connected to the fire monitor 6 through a control pipeline; the air inlet pipe 8 is connected to the other axial end of the dry powder tank 4 for connection to the drive gas cylinder 3; the feeding port 9 is located at the upper end of the dry powder tank 4 near the middle; the upper end of the feeding port 9 is detachably connected to a cover 28, which is opened to facilitate feeding when dry powder needs to be filled into the dry powder tank 4, and the cover 28 remains closed at the end of the feeding port 9 during the use of the dry powder tank 4; the return pipe 10 is bent along the direction of the airflow introduced by the air inlet pipe 8 at one end; the first switch valve and the second switch valve are linked to each other and open and close synchronously. In practical use, under the control of the first and second switching valves, during the initial nitrogen filling, the dry powder tank 4 is connected to the feeding port 9 but disconnected from the discharge port 7. Thus, after the nitrogen enters the dry powder tank 4, it mixes with the dry powder while flowing back from the return pipe 10 to the air inlet pipe 8, forming a ring flow path. This allows the dry powder in the dry powder tank 4 to flow with the nitrogen, thereby improving the mixing effect. After the dry powder tank 4 is filled with nitrogen to the specified pressure, under the control of the first and second switching valves, the dry powder tank 4 is disconnected from the feeding port 9 but connected to the discharge port 7. Thus, the fully mixed dry powder extinguishing agent can be directly supplied to the fire monitor 6 from the discharge port 7.

[0033] Compared with the prior art, the high-flow-rate three-phase jet fire truck proposed in this embodiment of the invention connects the air inlet pipe 8 and the feeding port 9 through a return pipe 10. Under the control of the first and second switching valves, nitrogen is initially introduced into the dry powder tank 4, which is connected to the feeding port 9 but disconnected from the discharge port 7. Thus, after the nitrogen enters the dry powder tank 4, it mixes with the dry powder while flowing back to the air inlet pipe 8 through the return pipe 10, forming a ring flow path. This allows the dry powder in the dry powder tank 4 to flow with the nitrogen, thereby improving the mixing effect. After the nitrogen in the dry powder tank 4 is filled to the specified pressure, the dry powder tank 4 is then disconnected from the feeding port 9 and connected to the discharge port 7, thereby supplying the dry powder extinguishing agent and avoiding the problem of uneven spraying of dry powder extinguishing agent at the beginning of the spray.

[0034] As a preferred technical solution of this embodiment, the first switching valve includes a valve plate 11 rotatably disposed inside the feeding port 9, and a drive unit 12 for controlling the rotation of the valve plate 11 is disposed on the outer wall of the dry powder tank 4. Specifically, the valve plate 11 is circular, and its outer diameter matches the inner diameter of the feeding port 9. The rotating shaft of the valve plate 11 passes through the center of the circle and is horizontally disposed axially. The drive unit 12 is preferably a torque motor or a telescopic torsion bar drive. The rotation range of the valve plate 11 is preferably 90°, and the two ends of the rotation range correspond to the horizontal and vertical surfaces of the valve plate 11. When the surface of the valve plate 11 is horizontal, it seals the connection between the dry powder tank 4 and the feeding port 9. When the surface of the valve plate 11 is vertical, the dry powder tank 4 is fully connected to the feeding port 9. A convex ring may be provided on the inner wall of the feeding port 9 to assist in the positioning of the valve plate 11 and improve the sealing performance. The specific configuration is prior art and will not be described in detail.

[0035] As a preferred technical solution in this embodiment, a partition 13 is provided inside the dry powder tank 4 to separate the storage area and the transition area. The storage area is connected to the air inlet pipe 8 and the feeding port 9, while the transition area is connected to the discharge port 7. The second switch valve is provided on the partition 13. Specifically, the partition 13 is located near the discharge port 7. The dry powder is filled in the storage area. Only when it is sprayed, the second switch valve is opened, and the mixed dry powder extinguishing agent enters the transition area from the storage area and is then supplied to the outside through the discharge port 7.

[0036] As a preferred embodiment, the second switching valve includes a plurality of first through holes 14 circumferentially arranged on the edge of the partition 13. An annular valve 15 is rotatably mounted close to the storage area side of the partition 13. The annular valve 15 has a plurality of second through holes 16 circumferentially arranged on its surface. The rotation of the annular valve 15 is linked to the rotation of the valve plate 11 via a linkage assembly. Specifically, the partition 13 is conical on the side near the storage area to help guide the dry powder extinguishing agent to the edge. The first through holes 14 are preferably oblong, with their length extending radially along the partition 13. The plurality of first through holes 14 are evenly arranged circumferentially on the edge of the partition 13 to connect the storage area and the transition area. The annular valve 15... Used to block the first through hole 14; the arrangement of the second through hole 16 is consistent with that of the first through hole 14, and the two correspond one-to-one; when the annular valve 15 rotates to make the second through hole 16 correspond to the first through hole 14, the storage area and the transition area are truly connected; the linkage component is set so that the rotation of the valve plate 11 is linked with the rotation of the annular valve 15, specifically: when the valve plate 11 rotates to the vertical position to make the dry powder tank 4 connect with the feeding port 9, the annular valve 15 rotates to make each second through hole 16 completely offset from each first through hole 14; when the valve plate 11 rotates to the horizontal position to make the dry powder tank 4 disconnect from the feeding port 9, the annular valve 15 rotates to make each second through hole 16 correspond to and coincide with each first through hole 14.

[0037] As a preferred technical solution in this embodiment, the linkage assembly includes a linkage ring 17 rotatably sleeved on the outside of the dry powder tank 4 and a linkage shaft 18 rotatably disposed on the outside of the dry powder tank 4. The rotating shaft of the valve plate 11 is connected to the linkage ring 17 via gear transmission, and the linkage shaft 18 is connected to the linkage ring 17 via gear transmission. An arc-shaped slider 19 is fixedly connected to the annular valve 15, and the arc-shaped slider 19 is connected to the linkage shaft 18 via gear transmission. Specifically, the linkage ring 17 is coaxial with the rotation axis of the dry powder tank 4 and is located near the feeding port 9; the axial direction of the linkage shaft 18 is parallel to the rotation axis of the dry powder tank 4, and preferably there are two shafts symmetrically arranged on two opposite sides of the dry powder tank 4; one end of the rotating shaft of the valve plate 11 is coaxially connected to a first The gear has a first rack on the linkage ring 17 that meshes with the first gear; a second gear is coaxially connected to the linkage shaft 18 at the position corresponding to the linkage ring 17, and a second rack is provided on the linkage ring 17 that meshes with the second gear; a third gear is coaxially connected to the linkage shaft 18 at the position corresponding to the arc-shaped slider 19, and a third rack is provided on the outer wall of the arc-shaped slider 19 that meshes with the third gear; the outer wall of the dry powder can 4 has a groove 20 that matches the arc-shaped slider 19, and the annular valve 15 is fixedly connected to the arc-shaped slider 19 through a connector 21 that moves through the side wall of the dry powder can 4; the position where the connector 21 passes through the dry powder can 4 is blocked and sealed by the annular valve 15, so as not to affect the airtightness of the dry powder can 4. In practical use, when the valve plate 11 rotates to the vertical position, the gear drives the linkage ring 17, the linkage ring 17 drives the linkage shaft 18, and the linkage shaft 18 drives the arc-shaped slider 19. This causes the arc-shaped slider 19 to slide within the slide groove 20, thereby driving the annular valve 15 to rotate via the connecting member 21. This causes the annular valve 15 to move the second through hole 16 away from the first through hole 14 on the partition 13 until the valve plate 11 reaches the vertical position, at which point the second through hole 16 is completely misaligned with the first through hole 14. When the valve plate 11 rotates to the horizontal position, the gear drives the linkage ring 17, the linkage ring 17 drives the linkage shaft 18, and the linkage shaft 18 drives the arc-shaped slider 19. This causes the arc-shaped slider 19 to slide within the slide groove 20, thereby driving the annular valve 15 to rotate via the connecting member 21. This causes the annular valve 15 to move the second through hole 16 closer to the first through hole 14 on the partition 13 until the valve plate 11 reaches the horizontal position, at which point the second through hole 16 can easily correspond to the first through hole 14.

[0038] In another embodiment of the present invention, a guide pipe 22 is provided at the end of the dry powder tank 4 away from the discharge port 7, and an air inlet pipe 8 is connected to the guide pipe 22. A flow guiding component is provided inside the guide pipe 22 to control the unidirectional flow of the air inlet pipe 8 to the dry powder tank 4. Specifically, the guide pipe 22 is located at the opposite end of the discharge port 7 and is coaxial with the rotation axis of the dry powder tank 4. The flow guiding component generates a negative pressure at the end of the guide pipe 22 connected to the air inlet pipe 8 to ensure that the air inlet pipe 8 flows unidirectionally into the guide pipe 22 and then into the dry powder tank 4.

[0039] As a preferred technical solution of this embodiment, the flow guiding component includes a sleeve 23 coaxially rotatably disposed inside the guide tube 22, an impeller 24 disposed on the outside of the sleeve 23, and a drive component for driving the sleeve 23 to rotate disposed on the outside of the dry powder tank 4. Specifically, the outer diameter of the sleeve 23 is smaller than the inner diameter of the guide tube 22, thereby leaving space for the impeller 24; the impeller 24 rotates to guide the flow unidirectionally into the dry powder tank 4 from the guide tube 22; the drive component includes a motor 29 mounted on the dry powder tank 4, a drive wheel 30 coaxially connected to the output end of the motor 29, a driven wheel 31 coaxially connected to the end of the sleeve 23 away from the dry powder tank 4, the drive wheel 30 and the driven wheel 31 are connected by a synchronous belt, and the driven wheel 31 is sealed and rotatably connected to the end of the guide tube 22 away from the dry powder tank 4.

[0040] As a preferred embodiment, a guide body 25 is rotatably mounted on the side of the partition 13 near the transition zone. The space between the inner wall of the transition zone and the outer wall of the guide body 25 is connected to each of the first through holes 14. Multiple guide vanes 26 are arranged circumferentially on the outer wall of the guide body 25. A shaft tube 27, coaxially fixedly connected to the guide body 25, is rotatably mounted inside the dry powder tank 4. One end of the shaft tube 27 rotatably passes through the sleeve 23 and is equipped with a clutch assembly. When the second switch valve is opened, the clutch assembly controls the shaft tube 27 and the sleeve 23 to rotate synchronously. Specifically, the guide body 25 is a rotating body and is coaxial with the rotation axis of the dry powder tank 4. One side of the guide body 25 is attached to the partition 13, while the other sides are left with gaps between them and the inner wall of the transition zone. The guide vanes 26 are arranged in multiple circumferentially as a group, and multiple groups are provided. Adjacent groups of guide vanes 26 are aligned in the vane extension direction. The shaft tube 27 should be aligned and spaced apart; after rotating through the partition 13, it connects to the guide body 25; the clutch assembly controls the shaft tube 27 and the sleeve 23 to rotate synchronously or decouple and remain stationary; when the second switch valve is opened, the shaft tube 27 and the sleeve 23 rotate synchronously, which corresponds to the feeding process of the dry powder extinguishing agent. At this time, the dry powder extinguishing agent enters the transition zone from the storage area. The shaft tube 27 drives the guide body 25 and the guide vanes 26 on it to rotate, thereby allowing the dry powder extinguishing agent to further spiral flow and accelerate, further ensuring the uniformity of the dry powder extinguishing agent, and also ensuring sufficient kinetic energy for the supply of the dry powder extinguishing agent; in addition, the guide vanes 26 of adjacent groups correspond in the direction of blade extension, so that the dry powder extinguishing agent flowing from the previous group of guide vanes 26 slides along the blade surface to the next group of guide vanes 26, reducing kinetic energy loss, reducing the generation of turbulent fluid, and greatly reducing noise.

[0041] As a further preferred technical solution of this embodiment, the clutch assembly includes a telescopic rod 32 axially movably connected to the end of the shaft tube 27 away from the guide body 25. A turntable 33 is coaxially fixedly connected to the telescopic rod 32. Damping grooves are provided on the surfaces of the turntable 33 and the driven wheel 31. A bracket 34 is synchronously mounted on the telescopic rod 32. The end of the linkage shaft 18 away from the annular valve 15 is threadedly connected to the bracket 34. Specifically, the telescopic rod 32 is connected to the shaft tube 27 via a keyway to ensure synchronous rotation of the telescopic rod 32 and the shaft tube 27 without affecting the axial movement of the telescopic rod 32 relative to the shaft tube 27. The turntable 33 corresponds to the driven wheel 31. When the turntable 33 and the driven wheel 31 are in contact, the two... The damping groove can transmit torque to rotate synchronously; a collar is provided on the bracket 34, and a convex ring is provided at the end of the telescopic rod 32 extending out of the shaft tube 27. The collar is sleeved on the telescopic rod 32 and limited between the turntable 33 and the convex ring; two linkage shafts 18 are respectively connected to the two ends of the bracket 34, and the two linkage shafts 18 rotate synchronously and have the same direction of threaded feed action as the bracket 34. Furthermore, when the valve plate 11 rotates to the horizontal position and the linkage shafts 18 rotate, the linkage shafts 18 cause the bracket 34 to drive the turntable 33 to move closer to the driven wheel 31 through the threaded feed action with the bracket 34. Conversely, the same principle applies, causing the bracket 34 to drive the turntable 33 away from the driven wheel 31.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-flow-rate three-phase jet fire truck, comprising a vehicle body (1), a turntable (2) mounted on the vehicle body (1), a drive gas cylinder (3) and a dry powder tank (4), a fire monitor (6) connected to the turntable (2) via a lifting arm (5), the drive gas cylinder (3) connected to the dry powder tank (4), and a discharge port (7) for connecting the fire monitor (6) at one end of the dry powder tank (4), characterized in that, Also includes: The air inlet pipe (8) is located at the opposite end of the outlet (7) on the dry powder tank (4); The feeding port (9) is located at the top of the dry powder tank (4), and its side wall is connected to the air inlet pipe (8) through the return pipe (10); The first switching valve is used to control the connection and disconnection between the feed port (9) and the dry powder tank (4); The second switching valve is used to control the connection and disconnection between the discharge port (7) and the dry powder tank (4); The first switching valve includes a valve plate (11) rotatably disposed inside the feeding port (9), and a drive unit (12) for controlling the rotation of the valve plate (11) is disposed on the outer wall of the dry powder tank (4). The dry powder tank (4) is provided with a partition (13) to separate the storage area and the transition area. The storage area is connected to the air inlet pipe (8) and the feeding port (9), while the transition area is connected to the discharge port (7). The second switch valve is installed on the partition (13). The second switching valve includes a plurality of first through holes (14) arranged circumferentially on the edge of the partition (13). A ring valve (15) is rotatably arranged close to the side of the partition (13) near the storage area. A plurality of second through holes (16) are arranged circumferentially on the ring valve (15). The rotation of the ring valve (15) is linked to the rotation of the valve plate (11) through the linkage component. The linkage assembly includes a linkage ring (17) rotatably sleeved on the outside of the dry powder tank (4) and a linkage shaft (18) rotatably set on the outside of the dry powder tank (4). The rotating shaft of the valve plate (11) is connected to the linkage ring (17) through gear transmission, and the linkage shaft (18) is connected to the linkage ring (17) through gear transmission. An arc-shaped slider (19) is fixedly connected to the annular valve (15), and the arc-shaped slider (19) is connected to the linkage shaft (18) through gear transmission.

2. The high-flow-rate three-phase jet fire truck according to claim 1, characterized in that, The outer wall of the dry powder tank (4) is provided with a groove (20) that matches the arc-shaped slider (19), and the annular valve (15) is fixedly connected to the arc-shaped slider (19) through a connector (21) that moves through the side wall of the dry powder tank (4).

3. The high-flow-rate three-phase jet fire truck according to claim 1, characterized in that, The dry powder tank (4) is provided with a guide pipe (22) at the end away from the discharge port (7). The air inlet pipe (8) is connected to the guide pipe (22). The guide pipe (22) is provided with a flow guiding component to control the air inlet pipe (8) to flow unidirectionally to the dry powder tank (4).

4. The high-flow-rate three-phase jet fire truck according to claim 3, characterized in that, The flow guiding assembly includes a sleeve (23) that is coaxially rotatable inside the guide tube (22), an impeller (24) is provided on the outside of the sleeve (23), and a drive assembly for driving the sleeve (23) to rotate is provided on the outside of the dry powder tank (4).

5. The high-flow-rate three-phase jet fire truck according to claim 4, characterized in that, The partition (13) is rotatably provided with a guide body (25) on the side near the transition zone. The space between the inner wall of the transition zone and the outer wall of the guide body (25) is connected to each of the first through holes (14). Multiple guide vanes (26) are provided on the circumference of the outer wall of the guide body (25). The dry powder tank (4) is rotatably provided with a shaft tube (27) that is coaxially fixedly connected to the guide body (25). One end of the shaft tube (27) rotatably passes through the sleeve (23) and is provided with a clutch assembly. When the second switch valve is opened, the clutch assembly controls the shaft tube (27) and the sleeve (23) to rotate synchronously.

6. The high-flow-rate three-phase jet fire truck according to claim 5, characterized in that, The guide vanes (26) are arranged in a circumferentially uniform manner as a group, and multiple groups are provided. The adjacent groups of guide vanes (26) overlap in the blade extension direction and are spaced apart.

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