A mixing machine for producing dry powder extinguishing agent

Abstract

This utility model relates to the field of dry powder mixing technology and discloses a mixer for the production of dry powder fire extinguishing agents. The utility model includes a mixing cylinder, a cover, a pressure pump, a drive assembly, a rotating assembly, a cleaning section, a flushing section, and a receiving assembly. The mixing cylinder is fixed by a clamping frame, and the cover has a sealing layer that seals with the mixing cylinder. The pressure pump is connected to an external water pipe. The rotating assembly includes a coaxially arranged hollow first rotating shaft and a second sleeve, driven by first and second motors to rotate in opposite directions. First and second stirring elements are correspondingly arranged on their outer circumferences and do not interfere with each other. The second sleeve has scrapers and nozzles alternately arranged on its support frame to achieve thorough cleaning of the cylinder wall. The end of the first rotating shaft is connected to a flushing nozzle, aligned with a discharge port equipped with an electric valve. This device improves mixing uniformity through dual-shaft reverse stirring, and combines pressurized water spray cleaning and discharge port flushing, achieving both mixing efficiency and ease of cleaning, making it suitable for large-scale production of dry powder fire extinguishing agents.

Description

Technical Field

[0001] This utility model relates to the field of dry powder mixing technology, and in particular to a mixer for producing dry powder fire extinguishing agents. Background Technology

[0002] In the production process of dry powder fire extinguishing agents, the uniform mixing of each component is the core process that determines the fire extinguishing efficiency of the product. As a key piece of equipment in this process, the mixer needs to achieve rapid dispersion and full integration of powder components, while also taking into account the ease of cleaning, operational stability and safety of the equipment. Currently, dry powder fire extinguishing agents are characterized by strong adsorption and easy accumulation. During the mixing process, some powder tends to adhere to the inner wall of the mixing drum, the surface of the stirring components, and the discharge port area. Long-term accumulation can easily form clumps and residues, which can not only cause cross-contamination between different batches of products, but also lead to blockage of the discharge port, requiring frequent shutdowns for manual cleaning, which seriously affects the continuity of production. In addition, dry powder dust is easily blown up during manual cleaning, and operators may inhale harmful dust, posing health and safety hazards. Manual cleaning is also difficult to achieve thorough cleaning, resulting in low cleaning efficiency and high labor intensity. Furthermore, the stirring components and cleaning structure of traditional mixers are independent of each other, requiring additional complex pipelines and control mechanisms, resulting in a bulky equipment structure, increased operation and maintenance costs, and insufficient sealing performance at the connection between the mixing drum and the cover, which can easily lead to dust leakage or leakage of cleaning fluid, polluting the production environment and reducing the cleaning effect.

[0003] Chinese patent CN 219502609 U discloses a dry powder mixer that uses a combination of pressure rollers, filter plates, and stirring blades to crush and uniformly mix damp, agglomerated dry powder, thus improving the mixing effect to some extent. However, this technical solution still has significant limitations: its core still relies on a single rotating shaft drive, making it difficult to create a complex flow field with high relative velocity, limiting the potential for improvement in mixing efficiency and uniformity; it lacks a built-in automatic cleaning structure, requiring manual cleaning of residual powder on the barrel wall and outlet after mixing, failing to address the problems of low cleaning efficiency, high labor intensity, and dust pollution; it lacks a dedicated anti-clogging structure for the outlet, posing a risk of blockage due to agglomerated residue during long-term use; and it fails to optimize the equipment's structural compactness and sealing performance, making it difficult to balance dust protection and efficient use of clean fluids during production.

[0004] Therefore, developing a mixer that combines efficient mixing, automatic cleaning, anti-clogging functions with a compact structure and reliable sealing has become an urgent technical problem to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a mixer for the production of dry powder fire extinguishing agents.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A mixer for producing dry powder fire extinguishing agent includes a mixing drum, with an opening and a discharge port at both ends of the mixing drum. A cover is detachably installed on the opening. A pressure pump is provided on the side of the cover away from the mixing drum. The water inlet of the pressure pump is connected to an external water pipe. Drive components are symmetrically arranged on both sides of the pressure pump on the cover. The mixing cylinder has a receiving cavity, and a rotating component is rotatably arranged in the receiving cavity. The output end of the driving component passes through the cover and extends downward to be rotatably connected to the rotating component. The rotating component includes a first rotating part and a second rotating part. The second rotating part is rotatably sleeved on the outer peripheral side of the first rotating part. A cleaning part is provided on the outer peripheral side of the second rotating part. The cleaning section includes several scrapers. One end of each scraper is connected to the outer wall of the second rotating section, and the other end abuts against the inner wall of the mixing cylinder. A cleaning element is provided on the side of the scraper near the mixing cylinder, and a nozzle is provided between each pair of scrapers. The first rotating section has a flushing section at the end away from the drive assembly, and the output end of the flushing section corresponds to the discharge port. Both the first rotating part and the second rotating part are hollow structures and are connected to the output end of the pressurizing pump.

[0007] Preferably, the first rotating part includes a first rotating shaft, and a plurality of first stirring elements are fixedly connected to the outer peripheral wall of the first rotating shaft at circumferential intervals. The second rotating part includes a second sleeve, which is coaxially arranged with the first rotating shaft, and the first rotating shaft is rotatably sleeved inside the second sleeve. A pair of support frames are symmetrically arranged radially on the outer peripheral wall of the second sleeve. The support frames are integrally formed with the second sleeve and are interconnected. A plurality of second stirring elements are arranged at intervals along the length direction on the side of the support frame away from the inner wall of the mixing cylinder. Both the first rotating shaft and the second sleeve are hollow structures.

[0008] Preferably, the first rotating shaft movably penetrates the inner wall of the second sleeve and extends along the length direction. The upwardly extending part of the first rotating shaft is connected to the output end of the pressure pump, and the upwardly extending part of the first rotating shaft is rotatably connected to the output end of the pressure pump through a sealed bearing. A water supply hole is opened on the outer periphery of the first rotating shaft, and the water supply hole is located inside the second sleeve.

[0009] Preferably, the drive assembly includes a first motor and a second motor, the drive ends of the first motor and the second motor are respectively connected to a first rotating shaft and a second sleeve through a transmission structure, and the first rotating shaft and the second sleeve rotate in opposite directions.

[0010] Preferably, the first stirring element and the second stirring element are respectively arranged at intervals along the length direction of the first rotating shaft and the support frame, and the first stirring element and the second stirring element do not interfere with each other when rotating.

[0011] Preferably, the scrapers and nozzles on both sides are distributed alternately in a circumferential manner along the outer peripheral wall of the support frame, and the positions of the scrapers and nozzles on both sides are alternately arranged to achieve thorough cleaning of the inner wall of the mixing drum.

[0012] Preferably, a sealing layer is sandwiched between the cover and the open end of the mixing cylinder, and the sealing layer is respectively fitted and sealed to the lower end face of the cover and the open end face of the mixing cylinder.

[0013] Preferably, it further includes a receiving component, which is composed of a pair of clamping frames, and the mixing cylinder is fixedly disposed between the two pairs of clamping frames.

[0014] Preferably, the discharge port is equipped with an electric valve.

[0015] Preferably, the flushing section includes a flushing nozzle, the water inlet end of the flushing nozzle is connected to the end of the first rotating shaft, and the output end of the flushing nozzle corresponds to the discharge port.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This invention, by setting up a first rotating part and a second rotating part that cooperate with each other, and combining a pressure pump with the hollow rotating part to form a fluid conduction path, achieves efficient mixing of the components of dry powder extinguishing agent through the coordinated action of the two rotating parts, avoiding local agglomeration of materials. On the other hand, the scraper and its cleaning parts on the outer periphery of the second rotating part, the nozzle, and the flushing part at the end of the first rotating part form a three-dimensional cleaning system, which can simultaneously clean the residue on the inner wall of the mixing cylinder and the discharge port area, effectively preventing equipment blockage caused by the agglomeration of dry powder extinguishing agent residue. At the same time, the detachable cover not only facilitates equipment maintenance and material delivery, but also ensures the sealing of the mixing and cleaning process with the sealing structure. The connection design between the pressure pump and the external water pipe provides a continuous and stable fluid supply for the cleaning process, significantly improving the practicality and ease of operation and maintenance of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a mixer for producing dry powder fire extinguishing agent according to the present invention. Figure 2 This is a cross-sectional view of the internal structure of a mixer for producing dry powder fire extinguishing agent according to the present invention. Figure 3 A schematic diagram showing the connection between the first rotating shaft and the second sleeve of a mixer for producing dry powder fire extinguishing agent according to this utility model; Figure 4This is a schematic diagram of the rotating component structure of a mixer for producing dry powder fire extinguishing agent according to the present invention.

[0018] In the diagram: 1. Receiving component; 2. Mixing cylinder; 3. Opening; 4. Discharge port; 5. Cover; 6. Pressure pump; 7. Water pipe; 8. Drive component; 9. Receiving cavity; 10. Rotating component; 11. First rotating part; 12. Second rotating part; 13. Cleaning part; 14. Scraper; 15. Support frame; 16. Cleaning component; 17. Nozzle; 18. Flushing part; 20. First rotating shaft; 21. First stirring component; 22. Second sleeve; 23. Second stirring component; 24. First motor; 25. Second motor; 28. Sealing layer; 29. ​​Clamping frame; 30. Water inlet; 31. Electric valve; 32. Flushing nozzle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figures 1-4 A mixer for producing dry powder fire extinguishing agent includes a mixing cylinder 2, with an opening 3 and a discharge port 4 at both ends of the mixing cylinder 2. A cover 5 is detachably installed on the opening 3. A pressure pump 6 is provided on the side of the cover 5 away from the mixing cylinder 2. The water inlet of the pressure pump 6 is connected to an external water pipe 7. Drive components 8 are symmetrically arranged on both sides of the pressure pump 6 on the cover 5. The mixing cylinder 2 has a receiving cavity 9, and a rotating assembly 10 is rotatably arranged in the receiving cavity 9. The output end of the driving assembly 8 passes through the cover 5 and extends downward to be rotatably connected to the rotating assembly 10. The rotating assembly 10 includes a first rotating part 11 and a second rotating part 12. The second rotating part 12 is rotatably sleeved on the outer periphery of the first rotating part 11, and a cleaning part 13 is provided on the outer periphery of the second rotating part 12. The cleaning section 13 includes several scrapers 14. One end of each scraper 14 is connected to the outer wall of the second rotating section 12, and the other end abuts against the inner wall of the mixing cylinder 2. A cleaning element 16 is provided on the side of the scraper 14 near the mixing cylinder 2, and a nozzle is provided between each pair of scrapers 14. The first rotating part 11 has a flushing part 18 at the end away from the driving component 8, and the output end of the flushing part 18 corresponds to the discharge port 4. Both the first rotating part 11 and the second rotating part 12 are hollow structures and are connected to the output end of the pressurizing pump 6.

[0021] In the example of this application, by setting up a first rotating part 11 and a second rotating part 12 that cooperate with each other, and combining the pressure pump 6 with the hollow rotating part to form a fluid conduction path, on the one hand, the efficient mixing of the components of the dry powder extinguishing agent can be achieved by the coordinated action of the two rotating parts, avoiding local agglomeration of materials; on the other hand, the scraper 14 on the outer periphery of the second rotating part 12 and its cleaning parts 16, the nozzle and the flushing part 18 at the end of the first rotating part 11 form a three-dimensional cleaning system, which can simultaneously clean the residue on the inner wall of the mixing cylinder 2 and the discharge port 4 area, effectively preventing equipment blockage caused by the agglomeration of dry powder extinguishing agent residue; at the same time, the detachable cover 5 not only facilitates equipment maintenance and material delivery, but also ensures the sealing of the mixing and cleaning process with the sealing structure, and the connection design between the pressure pump 6 and the external water pipe 7 provides a continuous and stable fluid supply for the cleaning process, significantly improving the practicality and ease of operation and maintenance of the equipment.

[0022] In the example of this application, the first rotating part 11 includes a first rotating shaft 20, and a plurality of first stirring elements 21 are fixedly connected to the outer peripheral wall of the first rotating shaft 20 at intervals along the circumferential direction. The second rotating part 12 includes a second sleeve 22, which is coaxially arranged with the first rotating shaft 20, and the first rotating shaft 20 is rotatably sleeved in the second sleeve 22. A pair of support frames 15 are radially symmetrically arranged on the outer peripheral wall of the second sleeve 22, and the scraper 14 is distributed at intervals along the outer wall of the support frame 15. The support frame 15 and the second sleeve 22 are integrally formed and interconnected. A plurality of second stirring elements 23 are arranged at intervals along the length direction on the side of the support frame 15 away from the inner sidewall of the mixing cylinder 2. Both the first rotating shaft 20 and the second sleeve 22 are hollow structures.

[0023] As a preferred example of this utility model, the first rotating shaft 20 of the first rotating part 11 and the second sleeve 22 of the second rotating part 12 are coaxially arranged, which not only ensures the compactness and operational stability of the overall structure of the equipment, but also provides precise motion guidance for the reverse or same-direction movements of the two rotating parts; the layered arrangement of the first stirring element 21 and the second stirring element 23 can perform multi-dimensional stirring of the dry powder extinguishing agent in different areas of the mixing cylinder 2, greatly improving the mixing uniformity; the integrated design of the second sleeve 22 and the support frame 15 not only enhances the connection strength and fatigue resistance of the components, but also realizes the unobstructed flow of fluid between the sleeve and the support frame 15, providing a smooth channel for the fluid injection of the subsequent nozzle; the hollow structure design cleverly takes into account both the stirring function and the fluid conduction requirements, achieving a high degree of unity between structure and function.

[0024] In the example of this application, the first rotating shaft 20 movably penetrates the inner wall of the second sleeve 22 and extends along the length direction. The upwardly extending part of the first rotating shaft 20 is connected to the output end of the pressure pump 6, and the upwardly extending part of the first rotating shaft 20 is rotatably connected to the output end of the pressure pump 6 through a sealed bearing. A water inlet 30 is provided on the outer periphery of the first rotating shaft 20, and the water inlet 30 is located inside the second sleeve 22.

[0025] As a preferred example of this utility model, the design of the first rotating shaft 20 passing through the second sleeve 22 and distributing fluid through the water inlet 30 eliminates the need for additional complex fluid pipelines. This allows for precise transmission of the fluid delivered by the pressurizing pump 6 to the second sleeve 22 and the support frame 15, ensuring a stable fluid supply to the nozzle and the cleaning component 16, simplifying the internal structure of the equipment, and reducing the risk of fluid leakage. The layout of the water inlet 30 within the second sleeve 22 allows the fluid to diffuse evenly during rotation, avoiding problems such as excessively high local fluid pressure or insufficient supply. This ensures consistent working performance between the cleaning component 16 and the nozzle, while also achieving coordinated fluid transmission and rotational motion, thus improving the operating efficiency of the equipment.

[0026] In the example of this application, the drive assembly 8 includes a first motor 24 and a second motor 25. The drive ends of the first motor 24 and the second motor 25 are respectively connected to the first rotating shaft 20 and the second sleeve 22 through corresponding transmission structures. The first rotating shaft 20 and the second sleeve 22 rotate in opposite directions.

[0027] As a preferred example of this utility model, the first motor 24 and the second motor 25 drive the first rotating shaft 20 and the second sleeve 22 to rotate in opposite directions, which can form a complex flow field with high relative velocity in the mixing cylinder 2, breaking the agglomeration tendency of dry powder extinguishing agent and promoting rapid penetration and uniform mixing between components. Compared with the traditional co-rotating stirring structure, the mixing efficiency and uniformity are significantly improved. The independent motor drive design can realize independent adjustment of the rotation speed of the first rotating part 11 and the second rotating part 12, which can flexibly adapt the stirring parameters according to the component characteristics and mixing requirements of the dry powder extinguishing agent, enhance the applicability and operational flexibility of the equipment, and effectively expand the application scenarios of the equipment. The transmission structure corresponding to the first motor 24 is a worm and a worm wheel. The worm is connected to the output end of the first motor 24, and the worm wheel is disposed on the outer periphery of the first rotating shaft 20. The worm meshes with the worm wheel on the first rotating shaft 20 to achieve driving. The transmission structure corresponding to the second motor 25 is a pair of bevel gears. The pair of bevel gears are respectively disposed on the outer periphery of the output end of the second motor 25, and the other bevel gear is disposed on the outer periphery of the second sleeve 22. The bevel gears mesh with each other to achieve driving.

[0028] In the example of this application, the first stirring element 21 and the second stirring element 23 are respectively arranged at intervals along the length direction of the first rotating shaft 20 and the support frame 15, and the first stirring element 21 and the second stirring element 23 do not interfere with each other when rotating.

[0029] As a preferred example of this utility model, the design of the first stirring element 21 and the second stirring element 23 being spaced apart along the length direction and rotating without interfering with each other avoids mechanical collisions and wear between the stirring elements, reduces the equipment failure rate, and extends the service life of the stirring elements. On the other hand, the spaced stirring elements can cover the entire space inside the mixing cylinder 2, forming a mixing effect without dead corners, avoiding the problem of local materials not being fully mixed, and ensuring the smooth flow of materials during the mixing process, further improving the mixing uniformity and mixing efficiency of the dry powder fire extinguishing agent, taking into account both the reliability of the equipment and the mixing effect.

[0030] In the example of this application, the scrapers 14 and nozzles 17 on both sides are distributed alternately in the circumferential direction along the outer peripheral wall of the support frame 15, and the positions of the scrapers 14 and nozzles 17 on both sides are alternately arranged to achieve thorough cleaning of the inner wall of the mixing cylinder 2.

[0031] As a preferred example of this utility model, the design of alternating intervals between the scraper 14 and the nozzle 17 along the outer periphery of the support frame 15 allows the physical scraping action of the scraper 14 and the fluid flushing action of the nozzle 17 to form a synergistic cleaning effect. The scraper 14 can quickly scrape off the dry powder residue adhering to the inner wall of the mixing cylinder 2, while the fluid sprayed by the nozzle 17 can deeply clean the wall surface after scraping by the scraper 14, effectively preventing the clumping of residual materials. The alternating distribution layout achieves full coverage of the inner wall of the mixing cylinder 2, eliminating cleaning dead corners and ensuring the cleanliness of the inner wall of the equipment. This avoids cross-contamination between different batches of dry powder extinguishing agents and prevents equipment blockage caused by residual clumping, providing a strong guarantee for the continuity of subsequent production and the stability of product quality.

[0032] In the example of this application, a sealing layer 28 is sandwiched between the cover 5 and the opening 3 end of the mixing cylinder 2, and the sealing layer 28 is respectively attached and sealed to the lower end face of the cover 5 and the opening 3 end face of the mixing cylinder 2.

[0033] As a preferred example of this utility model, the sealing layer 28 provided between the cover 5 and the opening 3 end of the mixing cylinder 2 can effectively enhance the sealing performance of both. On the one hand, it can prevent the leakage of dry powder extinguishing agent dust during the mixing process, ensuring the cleanliness of the production environment and the health of the operators, and avoiding safety hazards caused by dust pollution. On the other hand, it can prevent pressurized fluid from leaking from gaps during the cleaning process, ensuring that the fluid is concentrated on the cleaning component 16 and the nozzle 17, improving the cleaning effect while saving water resources. The close sealing design of the sealing layer 28 with the cover 5 and the end face of the mixing cylinder 2 can also reduce vibration noise during equipment operation and improve the stability and sealing of equipment operation.

[0034] In the example of this application, a receiving component 1 is also included, which consists of a pair of clamping frames 29, and the mixing cylinder 2 is fixedly disposed between the two pairs of clamping frames 29.

[0035] As a preferred example of this utility model, the receiving component 1, consisting of a pair of clamping frames 29, can securely clamp and fix the mixing cylinder 2, effectively offsetting the impact force generated by equipment vibration during mixing and cleaning, preventing the mixing cylinder 2 from shifting or tipping over, and ensuring the safety and stability of equipment operation. The support structure design of the clamping frame 29 not only provides a reliable installation foundation for the mixing cylinder 2, but also facilitates the handling, installation and debugging of the equipment, while avoiding wear or corrosion caused by the mixing cylinder 2 directly contacting the ground, extending the overall service life of the equipment, and providing structural protection for the long-term stable operation of the equipment.

[0036] In the example of this application, the discharge port 4 is equipped with an electric valve 31.

[0037] As a preferred example of this utility model, the electric valves 31 installed at the discharge ports 4 enable precise control of the discharge process. The valve opening and closing status can be flexibly adjusted according to the mixing progress of the dry powder extinguishing agent, preventing unmixed materials from being discharged prematurely and ensuring product quality. During the cleaning process, the electric valves 31 can be closed to form a closed cleaning space, ensuring that the cleaning fluid fully acts inside the mixing cylinder 2, improving the cleaning effect. After cleaning is completed, the valves can be opened to discharge the waste liquid, making the operation convenient and efficient. Compared with manual valves, the electric control method not only reduces the labor intensity of operators but also enables automated control, adapting to the needs of continuous industrial production and improving production efficiency and operational safety.

[0038] In the example of this application, the flushing part 18 includes a flushing nozzle 32, the water inlet end of the flushing nozzle 32 is connected to the end of the first rotating shaft 20, and the output end of the flushing nozzle 32 corresponds to the discharge port 4.

[0039] As a preferred example of this utility model, the design of the flushing nozzle 32 being connected to the end of the first rotating shaft 20 and having its output end corresponding to the discharge port 4 enables the use of pressurized fluid to perform directional flushing of the discharge port 4 area, specifically removing dry powder materials that are easily retained at the discharge port 4, effectively preventing blockage of the discharge port 4, and ensuring smooth material discharge; the directional spray design of the flushing nozzle 32 allows the fluid impact force to be concentrated on the key area of ​​the discharge port 4, resulting in higher cleaning efficiency, while avoiding ineffective fluid consumption and saving energy; this structure complements the cleaning components 16 and nozzles on the inner wall of the mixing cylinder 2, achieving all-round cleaning of the inside of the mixing cylinder 2 and the discharge port 4 area, further improving the thoroughness of equipment cleaning, reducing equipment maintenance costs, and ensuring long-term stable operation of the equipment.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mixer for producing dry powder fire extinguishing agent, characterized in that: include: A mixing cylinder (2) has an opening (3) and a discharge port (4) at both ends, and a cover (5) is detachably installed on the opening (3). The mixing cylinder (2) has a receiving cavity (9) inside, and a rotating assembly (10) that can rotate is provided inside the receiving cavity (9). The rotating assembly (10) includes a first rotating part (11) and a second rotating part (12). The second rotating part (12) is rotatably sleeved on the outer periphery of the first rotating part (11), and a cleaning part (13) is provided on the outer periphery of the second rotating part (12). The cleaning section (13) includes several scrapers (14). One end of the scraper (14) is connected to the outer wall of the second rotating section (12), and the other end abuts against the inner wall of the mixing cylinder (2). A cleaning element (16) is provided on the side of the scraper (14) near the mixing cylinder (2), and a nozzle is provided between each pair of scrapers (14). The first rotating part (11) has a flushing part (18) at one end away from the driving component (8), and the output end of the flushing part (18) corresponds to the discharge port (4); Both the first rotating part (11) and the second rotating part (12) are hollow structures.

2. The mixer for producing dry powder fire extinguishing agent according to claim 1, characterized in that, The first rotating part (11) includes a first rotating shaft (20), and a plurality of first stirring elements (21) are fixedly connected to the outer peripheral wall of the first rotating shaft (20) at intervals along the circumference. The second rotating part (12) includes a second sleeve (22), and the second sleeve (22) is coaxially arranged with the first rotating shaft (20), and the first rotating shaft (20) is rotatably sleeved in the second sleeve (22). A pair of support frames (15) are symmetrically arranged radially on the outer peripheral wall of the second sleeve (22). The scraper (14) is distributed at intervals along the outer wall of the support frame (15). The support frame (15) and the second sleeve (22) are integrally formed and interconnected. A plurality of second stirring elements (23) are arranged at intervals along the length direction on the side of the support frame (15) away from the inner wall of the mixing cylinder (2). The first rotating shaft (20) and the second sleeve (22) are both hollow structures.

3. The mixer for producing dry powder fire extinguishing agent according to claim 2, characterized in that, The cover (5) is provided with a pressure pump (6) on the side away from the mixing cylinder (2). The water inlet of the pressure pump (6) is connected to the external water pipe (7). The first rotating shaft (20) movably passes through the inner wall of the second sleeve (22) and extends along the length direction. The upward extension of the first rotating shaft (20) is connected to the output end of the pressure pump (6). The upward extension of the first rotating shaft (20) is rotatably connected to the output end of the pressure pump (6) through a sealed bearing. A water delivery hole (30) is opened on the outer periphery of the first rotating shaft (20). The water delivery hole (30) is located inside the second sleeve (22).

4. A mixer for producing dry powder fire extinguishing agent according to claim 2, characterized in that, The cover (5) is symmetrically provided with drive components (8) on both sides. The drive components (8) include a first motor (24) and a second motor (25). The drive ends of the first motor (24) and the second motor (25) are respectively connected to the first rotating shaft (20) and the second sleeve (22) through corresponding transmission structures. The first rotating shaft (20) and the second sleeve (22) rotate in opposite directions.

5. A mixer for producing dry powder fire extinguishing agent according to claim 2, characterized in that, The first stirring element (21) and the second stirring element (23) are respectively arranged at intervals along the length direction of the first rotating shaft (20) and the support frame (15), and the first stirring element (21) and the second stirring element (23) do not interfere with each other when rotating.

6. A mixer for producing dry powder fire extinguishing agent according to claim 1, characterized in that, The scrapers (14) and nozzles (17) on both sides are distributed alternately in the circumferential direction along the outer peripheral wall of the support frame (15), and the positions of the scrapers (14) and nozzles (17) on both sides are alternately arranged.

7. A mixer for producing dry powder fire extinguishing agent according to claim 1, characterized in that, A sealing layer (28) is sandwiched between the cover (5) and the opening (3) end of the mixing cylinder (2), and the sealing layer (28) is respectively fitted and sealed to the lower end face of the cover (5) and the opening (3) end face of the mixing cylinder (2).

8. A mixer for producing dry powder fire extinguishing agent according to claim 1, characterized in that, It also includes a receiving component (1), which consists of a pair of clamping frames (29), and the mixing cylinder (2) is fixedly disposed between the two pairs of clamping frames (29).

9. A mixer for producing dry powder fire extinguishing agent according to claim 1, characterized in that, The discharge port (4) is equipped with an electric valve (31).

10. A mixer for producing dry powder fire extinguishing agent according to claim 1, characterized in that, The flushing section (18) includes a flushing nozzle (32), the water inlet of the flushing nozzle (32) is connected to the end of the first rotating shaft (20), and the output end of the flushing nozzle (32) corresponds to the discharge port (4).

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