Powder delivery system, vehicle and fire fighting system

Abstract

This invention relates to the field of fire protection, providing a powder conveying system, a vehicle, and a fire protection system. The powder conveying system includes: a storage silo for storing powder; a feeding silo with a discharge port for connection to a spraying device; a discharge device including a housing and an impeller rotatably mounted inside the housing; the housing having an inlet communicating with the storage silo and a discharge port communicating with the feeding silo; the impeller positioned between the inlet and the discharge port, separating the inlet and the discharge port and conveying powder from the inlet to the discharge port; and an air source device connected to the feeding silo and used to inflate the feeding silo. The discharge device guides powder from the storage silo into the feeding silo. While conveying powder from the storage silo to the feeding silo, the discharge device prevents gas from the air source device from entering the storage silo through the discharge device and leaking back into the storage silo, thus replenishing powder to the feeding silo while simultaneously conveying powder to the spraying device.

Description

Technical Field

[0001] This invention relates to the field of fire protection, and more particularly to a powder conveying system, a vehicle, and a fire protection system. Background Technology

[0002] Powder fire trucks are capable of extinguishing fires involving flammable solids, flammable liquids, flammable gases, and toxic and hazardous substances, and are characterized by their wide range of applications and high fire-fighting efficiency. In related technologies, powder fire trucks typically include a powder tank, an air compressor, and a delivery pipeline. The powder tank stores the powder, and its outlet is connected to the spraying device via the delivery pipeline. The air compressor supplies air to the powder tank. During operation, the air compressor draws air into the powder tank, and the powder is carried by the airflow into the delivery pipeline and then ejected from the spraying device. Because the powder tank maintains pressure during spraying, it is impossible to replenish the powder tank during the spraying process. Summary of the Invention

[0003] This invention provides a powder conveying system, vehicle, and fire-fighting system to solve the defect in related technologies that cannot replenish powder during the powder spraying process, thereby achieving the effect of continuously replenishing powder during the powder spraying process.

[0004] This invention provides a powder conveying system for supplying powder to a spraying device, comprising:

[0005] A storage silo, used for storing powder materials;

[0006] A feeding bin, wherein the feeding bin is provided with a discharge port for connection to the spraying device;

[0007] A discharge device, comprising a housing and an impeller rotatably mounted inside the housing, the housing having an inlet communicating with the storage bin and a discharge port communicating with the feeding bin, the impeller being disposed between the inlet and the discharge port, the impeller being used to isolate the inlet and the discharge port and to transport the powder from the inlet to the discharge port;

[0008] An air source device is connected to the feeding hopper and is used to inflate the feeding hopper so that the pressure in the feeding hopper is higher than that in the storage hopper.

[0009] According to a powder conveying system provided by the present invention, a suction device is further included. The suction port of the suction device is connected to the storage silo and is used to suction gas from the storage silo. The storage silo is provided with an external interface for connecting to an external feeding device, so that the external feeding device can introduce powder into the storage silo.

[0010] According to a powder conveying system provided by the present invention, a first gas distribution plate having a plurality of gas distribution holes and a feed pipe passing through the first gas distribution plate are further included. The first gas distribution plate is disposed in the storage bin and divides the storage bin into two spaces. The suction port of the suction device is connected to the space on the first side of the first gas distribution plate, and the external interface is connected to the space on the second side of the first gas distribution plate.

[0011] According to a powder conveying system provided by the present invention, the gas source device is spatially connected to the second side of the first gas distribution plate, and the gas source device is also used to inflate the storage bin.

[0012] According to the powder conveying system provided by the present invention, a cavity structure is further included, wherein the feed inlet of the unloading device is connected to the storage bin through the cavity structure, and the suction port of the suction device is connected to the cavity structure.

[0013] According to the powder conveying system provided by the present invention, a cavity structure is further included, the cavity structure being connected between the discharge end of the suction device and the unloading device.

[0014] According to a powder conveying system provided by the present invention, a second gas distribution plate with a plurality of gas distribution holes is further included. The second gas distribution plate is disposed in the feeding bin and divides the feeding bin into two spaces. The gas source device is connected to the space on the first side of the second gas distribution plate. The discharge port of the feeding bin and the discharge port of the unloading device are both connected to the space on the second side of the second gas distribution plate.

[0015] According to a powder conveying system provided by the present invention, a discharge pipe is further included, the discharge pipe passing through the second gas distribution plate, and one end of the discharge pipe is disposed in the space on the second side of the second gas distribution plate, and the other end of the discharge pipe is connected to the discharge port.

[0016] According to a powder conveying system provided by the present invention, a purging branch is further included, one end of which is connected to the air source device, and the other end of which is used to connect to the injection device to purge the pipeline of the injection device.

[0017] The present invention also provides a vehicle including the powder conveying system described above.

[0018] According to a vehicle provided by the present invention, a transfer case is further included, and the air source device includes a compressor;

[0019] The transfer case connects the vehicle's power unit, the compressor, and the unloading device, and is used to transmit the power of the power unit to the compressor and the unloading device respectively.

[0020] According to a vehicle provided by the present invention, a transmission is further included, wherein at least one of the compressor and the unloading device is connected to the transfer case via a corresponding transmission.

[0021] The present invention also provides a fire-fighting system, including a tanker truck for supplying powder and a spray fire truck for spraying powder;

[0022] The fire protection system also includes the powder conveying system as described above or the vehicle as described above, wherein the storage silo is provided with an external interface for connecting to the tank truck, and the jet fire truck is connected to the discharge port of the feeding silo.

[0023] The powder conveying system provided by this invention includes a storage silo that can hold powder, and an air source device that can pressurize the feeding silo, increasing the pressure inside. Under this pressure, the powder in the feeding silo enters the spraying device from the outlet and is ultimately sprayed out. The inlet and outlet of the unloading device are connected to the storage silo and the feeding silo respectively. The impeller rotation transports the material from the storage silo to the feeding silo. Simultaneously, the impeller isolates the inlet and outlet, preventing gas from the feeding silo from entering the storage silo during the replenishment process.

[0024] With this configuration, the powder conveying system provided by the present invention introduces the powder in the storage bin into the feeding bin through the unloading device. While the unloading device guides the powder from the storage bin to the feeding bin, it can prevent the gas injected into the feeding bin by the air source device from entering the storage bin through the unloading device and leaking out. Thus, the feeding bin can replenish the powder to the feeding bin at the same time as it conveys the powder to the spraying device.

[0025] The vehicle and fire-fighting system provided by the present invention incorporates all the advantages of the powder conveying system described above. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a vehicle equipped with a powder conveying system provided in some embodiments of the present invention;

[0028] Figure 2 These are schematic diagrams of the fire protection system provided in some embodiments of the present invention;

[0029] Figure 3 This is a schematic diagram of the unloading device provided in some embodiments of the present invention.

[0030] Figure label:

[0031] 1. Storage silo; 2. Feeding silo; 3. Suction device; 4. Switch valve; 5. Gas source device; 6. First gas distribution plate; 7. Feed pipe; 8. Discharge device; 801. Shell; 802. Impeller; 803. Feed inlet; 804. Discharge outlet; 9. Cavity structure; 10. Second gas distribution plate; 11. Discharge pipe; 12. Purge branch; 13. Transfer case; 14. Gearbox; 15. Heating device; 16. External interface; 17. Discharge outlet; 18. Vehicle; 19. Tanker truck; 20. Spray fire truck. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention 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 invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0033] The following is combined Figures 1 to 3 The powder conveying system provided in the embodiments of the present invention is described.

[0034] Specifically, the powder conveying system is used to supply powder to the spraying device. The powder conveying system includes a storage silo 1, a feeding silo 2, a discharge device 8, and an air source device 5.

[0035] The storage silo 1 is used to store powder. The feeding silo 2 is provided with a discharge port 17 for connection to a spraying device, which can spray powder. Optionally, the storage silo 1 and the feeding silo 2 can be configured as two independent boxes or tanks, that is, two boxes or two tanks respectively constitute the storage silo 1 and the feeding silo 2. Of course, the storage silo 1 and the feeding silo 2 are not limited to the above-described form. For example, the interior of the box or tank can be divided into two spaces by a partition, and the two spaces respectively constitute the storage silo 1 and the feeding silo 2.

[0036] refer to Figure 3As shown, the unloading device 8 includes a housing 801 and an impeller 802 rotatably mounted inside the housing 801. The housing 801 has a feed inlet 803 communicating with the storage bin 1 and a discharge outlet 804 communicating with the feeding bin 2. The impeller 802 is disposed between the feed inlet 803 and the discharge outlet 804, and the impeller 802 is used to isolate the feed inlet 803 and the discharge outlet 804, and to convey the powder from the feed inlet 803 to the discharge outlet 804. For example, the unloading device 8 can be configured as a discharge valve.

[0037] The air source device 5 is connected to the feeding hopper 2 and is used to inflate the feeding hopper 2 so that the pressure in the feeding hopper 2 is higher than that in the storage hopper 1. For example, the air source device 5 can be a compressor or an air tank.

[0038] The powder conveying system provided in this embodiment of the invention can hold powder in a storage silo 1 and pressurize a feeding silo 2 by an air source device 5, thereby increasing the pressure inside the feeding silo 2. Under pressure, the powder in the feeding silo 2 enters the spraying device from the discharge port 17 and is finally sprayed out by the spraying device. The inlet 803 and outlet 804 of the unloading device 8 are connected to the storage silo 1 and the feeding silo 2 respectively. The rotation of the impeller 802 can convey the material in the storage silo 1 to the feeding silo 2. At the same time, the impeller 802 can isolate the inlet 803 and the outlet 804, thereby preventing gas in the feeding silo 2 from entering the storage silo 1 during the process of replenishing the feeding silo 2.

[0039] With this configuration, the powder conveying system provided in this embodiment of the invention introduces the powder in the storage bin 1 into the feeding bin 2 through the unloading device 8. While the unloading device 8 guides the powder from the storage bin 1 to the feeding bin 2, it can prevent the gas injected into the feeding bin 2 by the air source device 5 from entering the storage bin 1 through the unloading device 8 and leaking out. Thus, it can replenish the powder in the feeding bin 2 while conveying the powder to the spraying device.

[0040] In some embodiments of the present invention, the powder conveying system further includes a suction device 3. The suction port of the suction device 3 is connected to the storage silo 1, and the suction device 3 is used to suction the gas in the storage silo 1. The storage silo 1 is provided with an external interface for connecting to external feeding equipment, so that the external feeding equipment can introduce powder into the storage silo 1.

[0041] In this embodiment, the suction device 3 creates a negative pressure inside the storage silo 1, thereby drawing powder from the feeding device into the storage silo 1. Thus, the powder conveying system can be connected to an external feeding device and obtain powder from it without being limited by the volume of the storage silo 1. This allows the powder conveying system to supply powder to the spraying device for extended periods, improving the fire extinguishing performance of the spraying device.

[0042] Optionally, the feeding equipment includes, but is not limited to, tank truck 19. During use, the unloading port of the tank truck 19 and other feeding equipment is connected to the external interface 16. The tank truck 19 and other feeding equipment are typically equipped with an air compressor. Under the action of the air compressor, the powder material inside the feeding equipment enters the storage silo 1. Under the action of the suction device 3, a negative pressure is formed inside the storage silo 1, which increases the pressure difference between the feeding equipment and the storage silo 1. This increased pressure difference increases the conveying speed of the powder, thereby increasing the powder flow rate and thus improving the feeding speed of the feeding equipment to the storage silo 1.

[0043] Optionally, the exhaust port of the suction device 3 is connected to the outside of the storage silo 1. Optionally, the suction device 3 can be configured as a vacuum pump. Further, a switching valve 4 is provided at the inlet or outlet end of the suction device 3. The switching valve 4 is configured as a solenoid valve, and the switching valve 4 can be opened when the suction device 3 is turned on and closed when the suction device 3 is turned off. This ensures that when the suction device 3 is turned off, the switching valve 4 can maintain the airtightness of the storage silo 1, preventing the storage silo 1 from communicating with the outside atmosphere through the suction device 3 and ensuring the vacuum effect of the storage silo 1.

[0044] Optionally, the number of external interfaces 16 is set to at least two. By setting at least two external interfaces 16, the powder conveying system can connect to at least two feeding devices simultaneously, thereby further improving the powder conveying system's ability to continuously supply powder to the spraying device.

[0045] In some embodiments provided by the present invention, the powder conveying system further includes a first gas distribution plate 6 and a feed pipe 7.

[0046] The first gas distribution plate 6 has multiple gas distribution holes. The first gas distribution plate 6 is installed in the storage silo 1 and divides the storage silo 1 into two spaces. The suction port of the suction device 3 is connected to the space on the first side of the first gas distribution plate 6. The external interface 16 is connected to the space on the second side of the first gas distribution plate 6. The feed pipe 7 passes through the first gas distribution plate 6, that is, the feed pipe 7 connects the spaces on both sides of the first gas distribution plate 6. In the actual use of the powder conveying system, along the height direction of the storage silo 1, the space on the first side of the first gas distribution plate 6 is located above the space on the second side of the first gas distribution plate 6. For example, the first gas distribution plate 6 can be a fluidized bed.

[0047] During the process of external feeding equipment guiding powder into storage silo 1, under the action of the air compressor of the feeding equipment, the powder inside the feeding equipment is discharged from the discharge port along with the airflow injected by the air compressor and enters the space below the first gas distribution plate 6 through the external interface 16. The powder and part of the airflow entering the space below the first gas distribution plate 6 enter the space above the first gas distribution plate 6 through the feed pipe 7, and the remaining airflow passes through the gas distribution holes of the first gas distribution plate 6 and enters the space above the first gas distribution plate 6 to mix with the powder, thereby making the powder suspended in the airflow and producing a solid fluidization effect, so as to reduce the problem of powder accumulation and blockage. Of course, the suction action of the suction device can also produce the above effect, and the process is similar to the above, so it will not be described in detail.

[0048] With this configuration, the powder conveying system can obtain powder from external feeding equipment, thereby improving the continuous feeding capacity of the spraying device. It can also use the airflow generated by the feeding equipment or suction device to make the powder in the storage bin 1 solid fluidized, thereby reducing the problem of powder accumulation and blockage in the storage bin 1, so that the powder in the storage bin 1 can smoothly enter the feeding bin 2.

[0049] In some embodiments provided by the present invention, the gas source device 5 is connected to the space on the second side of the first gas distribution plate 6, and the gas source device 5 is used to fill the storage bin 1 with gas, that is, to fill the space on the second side of the first gas distribution plate 6 with gas.

[0050] With this configuration, even without external feeding equipment, gas can be injected into the space on the second side of the first gas distribution plate 6 via the gas source device 5. The gas enters the space on the first side of the first gas distribution plate 6 through the gas distribution holes, causing the powder in the space on the first side of the first gas distribution plate 6 to achieve a solid fluidization effect. The gas in the storage silo 1 can be extracted by a suction device so that the gas source device 5 can continuously supply gas to the storage silo. In this way, the powder stored in the storage silo 1 of the powder conveying system can be fluidized and conveyed to the feeding silo 2 without the need for external feeding equipment.

[0051] Furthermore, the gas source device 5 is connected to the space on the second side of the first gas distribution plate 6 through a pressure reducing valve, and the pressure entering the storage silo 1 is adjusted by setting the pressure reducing valve.

[0052] In some embodiments of the present invention, the powder conveying system further includes a cavity structure 9. The inlet 803 of the unloading device 8 is connected to the storage silo 1 through the cavity structure 9, and the suction port of the suction device 3 is connected to the cavity structure 9. For example, the cavity structure 9 may be disposed inside the storage silo 1, and the cavity structure 9 has a through hole communicating with the storage silo 1.

[0053] In this embodiment, the suction device 3 draws gas from the cavity structure 9, causing the cavity structure 9 to generate negative pressure. Since the cavity structure 9 is connected to the storage bin 1, the powder in the storage bin enters the cavity structure 9 with the airflow. The material in the cavity structure 9 enters the feed port 803 of the unloading device 8 under the action of gravity, and enters the feeding bin 2 through the conveying action of the unloading device 8.

[0054] Since the powder needs to enter the feed inlet 803 of the unloading device 8 under the action of gravity, the powder needs to always meet a certain thickness requirement in order to continuously fall into the feed inlet 803 of the unloading device 8. If the storage bin 1 is set above the feeding bin, although it can meet the requirement of dropping material into the unloading device 8, it will also make the height of the powder conveying system too high and reduce its stability. In this embodiment, the powder in the storage bin 1 is guided to the cavity structure 9 by the suction action of the suction device 3. The powder in the cavity structure 9 is sucked in by the suction action of the suction device 3. Under the action of the suction device 3, the powder in the cavity structure 9 can always maintain a corresponding thickness to meet the requirements of the discharge device 8. It is not affected by the height of the powder in the storage bin 1 or the relative position relationship between the storage bin 1 and the feeding bin 2, so that the relative position arrangement of the storage bin 1 and the feeding bin 2 is more flexible. For example, the storage bin 1 and the feeding bin 2 can be arranged horizontally. Compared with the vertical arrangement, the horizontal arrangement can lower the center of gravity of the powder conveying system and ensure the stability of the powder conveying system.

[0055] In some embodiments of the present invention, the powder conveying system further includes a second gas distribution plate 10. The second gas distribution plate 10 has multiple gas distribution holes and is disposed in the feeding hopper 2, dividing the feeding hopper 2 into two spaces. The gas source device 5 is connected to the space on the first side of the second gas distribution plate 10, and the discharge port 17 of the feeding hopper 2 and the discharge port 804 of the unloading device 8 are both connected to the space on the second side of the second gas distribution plate 10. During actual operation of the powder conveying system, along the height direction of the feeding hopper 2, the space on the first side of the second gas distribution plate 10 is located below the space on the second side. For example, the second gas distribution plate 10 may be configured as a fluidized bed.

[0056] During the pressurization process of the air source device 5 into the feeding bin 2, the airflow generated by the air source device 5 enters the space on the first side of the second gas distribution plate 10, and enters the space on the second side of the second gas distribution plate 10 through the gas distribution holes on the second gas distribution plate 10. Then it mixes with the powder to suspend the powder in the airflow, so that the powder forms a solid fluidization effect, reducing the problem of powder accumulation and blockage in the feeding bin 2, so that the powder in the feeding bin 2 can enter the spraying device.

[0057] In this embodiment, by setting the second gas distribution plate 10, the airflow provided by the gas source device 5 can both pressurize the feeding bin 2 and cause the powder in the feeding bin 2 to produce a solid fluidization effect during the pressurization process.

[0058] In some embodiments of the present invention, the powder conveying system further includes a discharge pipe 11. The discharge port 17 of the feeding hopper 2 is located at or below the bottom of the feeding hopper 2. The discharge pipe 11 passes through the second gas distribution plate 10, with one end of the discharge pipe 11 located in the space on the second side of the second gas distribution plate 10, and the other end of the discharge pipe 11 connected to the discharge port 17. In this embodiment, during the operation of the powder conveying system, under the pressure within the feeding hopper 2, the powder in the space on the second side of the second gas distribution plate 10 is discharged from the discharge port 17 through the discharge pipe 11.

[0059] With this configuration, the discharge port 17 can be located at the bottom or below the feeding hopper 2 by setting the discharge pipe 11, which reduces the height of the discharge port 17, making it easier for the operator to connect or disconnect the spraying device from the discharge port 17.

[0060] In some embodiments provided by the present invention, the powder conveying system further includes a purging branch 12. Specifically, one end of the purging branch 12 is connected to the air source device 5, and the other end of the purging branch 12 is used to connect to the spraying device to purge the pipeline of the spraying device.

[0061] Specifically, for example, after the spraying device sprays powder, it can be connected to the purging branch 12, and then the air source device 5 and the purging branch 12 can be turned on to purge the pipeline of the spraying device, preventing powder from accumulating in the pipeline. Additionally, in some cases, when powder needs to be sprayed again after the spraying device has sprayed fire-fighting liquid, the purging branch 12 can be connected to the spraying device to purge and dry the pipeline, thus preventing the powder in the pipeline from reacting with the fire-fighting liquid or adhering to the pipeline of the spraying device. Furthermore, in cold weather, after the spraying device has sprayed fire-fighting liquid, the purging branch 12 can be connected to the spraying device to purge and dry the pipeline to prevent the liquid in the pipeline from freezing.

[0062] Furthermore, the purging branch 12 includes a heating device 15 and a control valve. The heating device 15 is used to heat the gas supplied by the gas source device 5 to improve the drying effect of the gas on the moisture in the injection device pipeline. The control valve is used to control the on / off state of the purging branch 12. The control valve can be a solenoid valve.

[0063] Optionally, the heating device 15 can be an electric heating device, or the heating device 15 can also be a heat exchanger, which can be used to recover the heat from the engine of the vehicle 18 for heating the gas.

[0064] This invention also provides a vehicle 18.

[0065] Specifically, vehicle 18 includes the powder conveying system described above.

[0066] It should be noted that vehicle 18 includes a powder conveying system, and therefore includes all the advantages of the powder conveying system mentioned above.

[0067] In some embodiments provided by the present invention, the vehicle 18 further includes a transfer case 13 and the air supply device 5 includes a compressor.

[0068] The transfer case 13 connects the power unit, compressor, and unloading device 8 of the vehicle 18, and is used to transmit power from the power unit to the compressor and unloading device 8 respectively. The power unit includes, but is not limited to, an engine and an electric motor.

[0069] This configuration allows both the unloading device 8 and the compressor to draw power from the power unit of the vehicle 18.

[0070] In some embodiments provided by the present invention, the vehicle 18 further includes a transmission 14. At least one of the compressor and the unloading device 8 is connected to the transfer case 13 via a corresponding transmission 14. For example, the unloading device 8 is connected to the transfer case 13 via a corresponding transmission 14, which allows adjustment of the rotational speed of the unloading device 8, thereby regulating the flow rate of powder entering the feeding hopper 2 from the storage hopper 1. Similarly, the compressor is connected to the transfer case 13 via a corresponding transmission 14, which allows adjustment of the compressor's rotational speed, thereby regulating the compressor's output pressure.

[0071] In some embodiments provided by the present invention, vehicle 18 includes a spraying device, that is, vehicle 18 is capable of both conveying powder and spraying powder.

[0072] An embodiment of the present invention also provides a fire protection system.

[0073] Specifically, the fire protection system includes a tanker truck 19 for supplying powder and a jet fire truck 20 for spraying powder.

[0074] The fire protection system also includes the powder conveying system described above or the vehicle 18 described above. The storage silo 1 is provided with an external interface 16 for connection to the tank truck 19. The spray fire truck 20 is connected to the discharge port 17 of the feeding silo 2. That is, the tank truck 19 constitutes the feeding equipment, and the spray fire truck 20 constitutes the spraying device. (Reference) Figure 2 As shown, the fire protection system can obtain powder from the tanker truck 19, pressurize it through the powder conveying system, and then transmit it to the jet fire truck 20 for high-altitude spraying.

[0075] With this setup, the fire protection system includes a powder conveying system or vehicle 18, which also includes the corresponding advantages, which will not be elaborated here.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A powder conveying system, characterized in that, For supplying powder to the spraying device, including: Storage bin (1), the storage bin (1) is used to store powder; The feeding bin (2) is provided with a discharge port (17) for connection with the spraying device. The unloading device (8) includes a housing (801) and an impeller (802) rotatably installed inside the housing. The housing is provided with an inlet (803) communicating with the storage bin (1) and a discharge port (804) communicating with the feeding bin (2). The impeller (802) is located between the inlet (803) and the discharge port (804). The impeller (802) is used to isolate the inlet (803) and the discharge port (804) and to transport the powder from the inlet (803) to the discharge port (804). An air source device (5) is connected to the feeding bin (2) and is used to inflate the feeding bin (2) so that the pressure of the feeding bin (2) is higher than that of the storage bin (1). It also includes a suction device (3) and a cavity structure (9); the feed inlet of the unloading device (8) is connected to the storage bin (1) through the cavity structure (9), and the suction port of the suction device (3) is connected to the cavity structure (9).

2. The powder conveying system according to claim 1, characterized in that, The suction port of the suction device (3) is connected to the storage bin (1) and is used to suction the gas in the storage bin (1). The storage bin (1) is provided with an external interface (16) for connecting with an external feeding device so that the external feeding device can introduce powder into the storage bin (1).

3. The powder conveying system according to claim 2, characterized in that, It also includes a first gas distribution plate (6) with multiple gas distribution holes and a feed pipe (7) that passes through the first gas distribution plate (6). The first gas distribution plate (6) is set in the storage bin (1) and divides the storage bin (1) into two spaces. The suction port of the suction device (3) is connected to the space on the first side of the first gas distribution plate (6), and the external interface (16) is connected to the space on the second side of the first gas distribution plate (6).

4. The powder conveying system according to claim 3, characterized in that, The gas source device (5) is spatially connected to the second side of the first gas distribution plate (6), and the gas source device (5) is also used to inflate the storage bin (1).

5. The powder conveying system according to any one of claims 1-4, characterized in that, It also includes a second gas distribution plate (10) with multiple gas distribution holes. The second gas distribution plate (10) is disposed in the feeding bin (2) and divides the feeding bin (2) into two spaces. The gas source device (5) is connected to the space on the first side of the second gas distribution plate (10). The discharge port (17) of the feeding bin (2) and the discharge port (804) of the unloading device (8) are both connected to the space on the second side of the second gas distribution plate (10).

6. The powder conveying system according to any one of claims 1-4, characterized in that, It also includes a purging branch (12), one end of which is connected to the air source device (5), and the other end of which is used to connect to the injection device to purge the pipeline of the injection device.

7. A vehicle (18), characterized in that, Includes the powder conveying system as described in any one of claims 1-6.

8. The vehicle (18) according to claim 7, characterized in that, It also includes a transfer case (13), and the air source device (5) includes a compressor; The transfer case (13) is connected to the power unit of the vehicle (18), the compressor and the unloading device (8), and is used to transmit the power of the power unit to the compressor and the unloading device (8) respectively.

9. A fire protection system, characterized in that, This includes tank trucks (19) for supplying powder and jet fire trucks (20) for spraying powder. The fire protection system further includes a powder conveying system as described in any one of claims 1-6 or a vehicle (18) as described in any one of claims 7-8, wherein the storage silo (1) is provided with an external interface (16) for connection with the tank truck (19), and the jet fire truck (20) is connected to the discharge port (17) of the feeding silo (2).

Images