A steel fiber concrete mixer

Abstract

The application provides a steel fiber concrete mixer belonging to the technical field of mixers, which comprises a support and a stirring drum, a stirring mechanism is arranged in the stirring drum, an extrusion mechanism and a dispersion mechanism are arranged on the stirring part, the extrusion mechanism comprises an upper grinding disc and a lower grinding disc, the upper grinding disc and the lower grinding disc are coaxially arranged, the rotating directions of the upper grinding disc and the lower grinding disc are opposite or the lower grinding disc is kept stationary, the upper grinding disc is provided with a feeding hole, and the upper grinding disc is provided with the dispersion mechanism. The steel fibers generated by cutting in mechanical processing are collected and disposed into the feeding hole of the upper grinding disc, the steel fibers are extruded and rubbed between the gap between the upper grinding disc and the lower grinding disc, the steel fibers are dispersed through the interaction of the upper grinding disc and the lower grinding disc, the dispersed steel fibers are dispersed into the concrete in the stirring drum through the dispersion mechanism, and the steel fibers are fully dispersed into the concrete through the stirring action of the stirring mechanism.

Description

Technical Field

[0001] This invention relates to the field of mixer technology, and more particularly to a steel fiber reinforced concrete mixer. Background Technology

[0002] Steel fiber reinforced concrete is a novel multiphase composite material formed by incorporating randomly distributed short steel fibers into ordinary concrete. These randomly distributed steel fibers effectively inhibit the propagation of micro-cracks and the formation of macro-cracks within the concrete, significantly improving the tensile, flexural, impact, and fatigue properties of the concrete, and exhibiting good ductility. In engineering, serrated steel fibers are now used. The serrated surface of these fibers has serrated protrusions, a special shape that significantly increases the mechanical interlocking force between the fiber and the concrete. The enhanced bonding performance of serrated steel fibers in concrete effectively disperses stress. When subjected to tensile stress, the fibers transfer stress through the serrated protrusions, preventing the fibers from being pulled out of the concrete. This helps improve the crack resistance of concrete, delays crack propagation and development, thereby improving the overall durability of the concrete structure. Furthermore, the steel fibers require no additional surface treatment or bonding strength enhancement.

[0003] Because the serrated steel fibers are long and thin, they easily entangle with each other during concrete mixing, forming clumps and failing to disperse evenly. This can lead to localized areas with excessively high or low steel fiber density, affecting the performance of the concrete.

[0004] Therefore, in order to address the above problems, a steel fiber reinforced concrete mixer is proposed to solve them. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention develops a steel fiber concrete mixer that can break up clumps of steel fiber materials and uniformly disperse and mix them into concrete.

[0006] The technical solution to the technical problem solved by the present invention is as follows: a steel fiber concrete mixer, including a support and a mixing drum, a mixing mechanism is provided inside the mixing drum, and an extrusion mechanism and a dispersion mechanism are provided on the mixing part. The extrusion mechanism includes an upper grinding disc and a lower grinding disc, which are coaxially arranged. The upper grinding disc and the lower grinding disc rotate in opposite directions or the lower grinding disc remains stationary. The upper grinding disc is provided with a feed hole and the upper grinding disc is provided with a dispersion mechanism.

[0007] The steel fibers generated during machining are collected and fed into the upper grinding disc through the feed hole. The steel fibers are squeezed and rubbed between the upper and lower grinding discs. Through the interaction between the upper and lower grinding discs, the clumps of steel fibers are broken up and dispersed into the concrete in the mixing drum by the dispersion mechanism. Then, through the stirring action of the mixing mechanism, the steel fibers are fully dispersed into the concrete.

[0008] Preferably, the extrusion mechanism includes support rods, support plates, slide rails, and turntables. Multiple support rods are evenly arranged in the upper part of the mixing cylinder. The multiple support rods are located in the same plane and are connected to the support plate. An annular slide rail is provided on the support plate, and a turntable slides on the slide rail. The turntable is connected to the upper grinding disc.

[0009] The turntable and upper grinding disc are supported by support rods and support plates to prevent the upper grinding disc from pressing directly on the lower grinding disc. At the same time, a ring slide rail is set to facilitate the rotation of the turntable and upper grinding disc and prevent misalignment.

[0010] Preferably, the extrusion mechanism also includes a positioning groove, a positioning plate, fixing bolts, a gear ring, a gear, and a first motor. The upper grinding disc is provided with multiple positioning plates, which are positioned in the positioning groove. The positioning plates are provided with multiple fixing bolts. A gear ring is provided on the outer side of the turntable, which meshes with the gear. The gear is connected to the first motor.

[0011] The upper grinding disc is fixed to the turntable by multiple positioning plates and positioning slots. The upper grinding disc rotates together with the turntable. The motor drives the gear to rotate, and the gear drives the gear ring and the turntable to rotate. The torque is amplified by the deceleration effect of the gear and gear ring, which improves the mechanical dispersing effect of the upper grinding disc on the clumps of steel fibers.

[0012] Preferably, a feed hopper is provided at the feed hole of the upper grinding disc, a spiral scraper is provided at the lower end of the upper grinding disc, and a material distribution groove and an extrusion groove are provided at the upper end of the lower grinding disc. The material distribution groove is located in the middle of the lower grinding disc and is connected to the extrusion groove. The upper surface of the extrusion groove is inclined, and the depth of the extrusion groove becomes shallower from the middle of the lower grinding disc to the outside.

[0013] By setting up a spiral scraper, the upper grinding disc drives the steel fibers from the center to the outside during rotation, so that the steel fibers enter the extrusion groove from the distribution groove. Through the extrusion effect of the extrusion groove and the spiral scraper, the steel fibers are broken up. The depth of the extrusion groove becomes shallower from the middle of the lower grinding disc to the outside. The closer to the outside, the finer and more dispersed the steel fibers that are clustered together, thus achieving continuous extrusion.

[0014] Preferably, the dispersing mechanism includes an air passage, an air blowing hole, an air chamber, and a high-pressure air pump. The air passage is located inside the spiral scraper, and multiple air blowing holes are provided on the spiral scraper. The air blowing holes are connected to the air passage, and the air passage is connected to the air chamber. The air chamber is located inside the upper grinding disc and is connected to the high-pressure air pump.

[0015] A high-pressure air pump generates compressed air, which enters the air passage and blowing hole of the spiral scraper through the air chamber. The blowing hole blows out high-pressure air, which forms an air vortex between the spiral scrapers, thus assisting in the movement of the steel fibers.

[0016] Preferably, the dispersing mechanism also includes an annular groove, a connecting sleeve, a venting chamber, a sealing ring, and a venting hole. The venting hole is provided in the air chamber and is connected to the feed hole of the upper grinding disc. The venting hole is inclined downward from the air chamber to the feed hole. An annular groove is provided on the air chamber. A connecting sleeve is provided in the annular groove. Multiple sealing rings are provided on the outside of the connecting sleeve. A venting chamber is provided in the connecting sleeve and is connected to the air chamber and a high-pressure air pump.

[0017] High-pressure air generated by the high-pressure air pump enters the air chamber through the air guide chamber of the connecting sleeve. The connecting sleeve remains stable during the rotation of the upper grinding disc to prevent misalignment between the connecting sleeve and the high-pressure air pump. The air chamber is equipped with an air guide hole that communicates with the feed hole. High-pressure air assists the steel fiber to move downward, making the feeding of the steel fiber smoother.

[0018] Preferably, the dispersing mechanism also includes a mounting groove, a connecting platform, a torsion spring, a connecting shaft, and a lever. The mounting groove is located in the extrusion groove of the lower grinding disc and is situated at the edge of the lower grinding disc. The height of the mounting groove is lower than that of the extrusion groove. Multiple connecting platforms are provided in the mounting groove. The connecting platforms are rotatably connected to the connecting shaft, which is connected to the lever. A torsion spring is provided on the connecting shaft.

[0019] As the steel fibers move downwards to the outside of the grinding disc, they collide with the paddle. The paddle swings under the action of the torsion spring, throwing the steel fibers outwards and improving the dispersion effect of the steel fibers.

[0020] Preferably, the mixing mechanism includes a material guiding chamber, a discharge pipe, a main shaft, a second motor, mixing blades, a mounting platform, positioning columns, and positioning holes. The main shaft is vertically arranged inside the mixing drum and is connected to the second motor. Multiple mixing blades are arranged on the outside of the main shaft. A mounting platform is arranged at the upper end of the main shaft, and multiple positioning columns are arranged on the mounting platform. Multiple positioning holes that cooperate with the positioning columns are arranged on the lower grinding disc. A material guiding chamber is arranged on the upper part of the outside of the mixing drum, and a discharge pipe is arranged at the bottom of the mixing drum.

[0021] The second motor drives the main shaft and mixing blades to rotate. The mixing blades mix the concrete and steel fibers in the mixing drum, thoroughly mixing the steel fibers and concrete. The lower grinding disc is rotated by the positioning column and mounting platform.

[0022] The effects described in the invention are merely those of the embodiments, and not all the effects of the invention. The above technical solutions have the following advantages or beneficial effects: The steel fibers generated during machining are collected and fed into the upper grinding disc through the feed hole. The steel fibers are squeezed and rubbed between the upper and lower grinding discs. Through the interaction between the upper and lower grinding discs, the clumps of steel fibers are broken up and dispersed into the concrete in the mixing drum by the dispersion mechanism. Then, through the stirring action of the mixing mechanism, the steel fibers are fully dispersed into the concrete. The upper grinding disc is fixed on the turntable by multiple positioning plates and positioning slots. The upper grinding disc rotates together with the turntable. The motor drives the gear to rotate, and the gear drives the gear ring and the turntable to rotate. The torque is amplified by the deceleration effect of the gear and gear ring, which improves the mechanical dispersing effect of the upper grinding disc on the clumps of steel fibers. A high-pressure air pump generates compressed air, which enters the air passage and blowing hole of the spiral scraper through the air chamber. The blowing hole blows out high-pressure air, which forms an air vortex between the spiral scrapers, thus assisting in the movement of the steel fibers. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0024] Figure 1 This is a schematic diagram of the structure of the present invention.

[0025] Figure 2 This is a schematic cross-sectional view of the present invention.

[0026] Figure 3 This is a schematic diagram of the lower grinding disc structure of the present invention.

[0027] Figure 4 This is a schematic diagram of the upper grinding disc structure of the present invention.

[0028] Figure 5 Appendix to this invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0029] Figure 6 Appendix to this invention Figure 3 Enlarged schematic diagram of the structure at point B.

[0030] In the diagram, 1. Support frame; 2. Mixing drum; 3. Upper grinding disc; 4. Lower grinding disc; 5. Feed hole; 6. Support rod; 7. Support plate; 8. Slide rail; 9. Turntable; 10. Positioning groove; 11. Positioning plate; 12. Fixing bolt; 13. Gear ring; 14. Gear; 15. First motor; 16. Feed hopper; 17. Spiral scraper; 18. Distributing trough; 19. Extrusion trough; 20. Air passage; 21. Air blowing hole; 22. Air chamber; 23. High-pressure air pump; 24. Annular groove; 25. Connecting sleeve; 26. Air chamber; 27. Sealing ring; 28. Air guide hole; 29. ​​Mounting groove; 30. Connecting platform; 31. Torsion spring; 32. Connecting shaft; 33. Paddle; 34. Material guide chamber; 35. Discharge pipe; 36. Main shaft; 37. Second motor; 38. Stirring blade; 39. Mounting platform; 40. Positioning column; 41. Positioning hole. Detailed Implementation

[0031] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure of the invention, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the invention. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] like Figures 1 to 6 As shown, a steel fiber reinforced concrete mixer includes a support frame 1 and a mixing drum 2. A mixing mechanism is installed inside the mixing drum 2, and an extrusion mechanism and a dispersion mechanism are installed on the mixing section. The extrusion mechanism includes an upper grinding disc 3 and a lower grinding disc 4, which are coaxially arranged. The upper grinding disc 3 and the lower grinding disc 4 rotate in opposite directions, or the lower grinding disc 4 remains stationary. The upper grinding disc 3 is provided with a feed hole 5, and the dispersion mechanism is also provided on the upper grinding disc 3. Steel fibers generated during machining are collected and fed into the concrete inside the mixing drum 2 through the feed hole 5. The steel fibers are subjected to extrusion and friction between the upper grinding disc 3 and the lower grinding disc 4. Through the interaction of the upper grinding disc 3 and the lower grinding disc 4, the clumps of steel fibers are broken up and dispersed into the concrete inside the mixing drum 2 by the dispersion mechanism. The mixing mechanism then further disperses the steel fibers into the concrete.

[0033] The extrusion mechanism includes support rods 6, support plates 7, slide rails 8, and a turntable 9. Multiple support rods 6 are evenly arranged in the upper part of the mixing cylinder 2, all located in the same plane and connected to the support plate 7. An annular slide rail 8 is installed on the support plate 7, and the turntable 9 slides along the slide rail 8. The turntable 9 is connected to the upper grinding disc 3. The support rods 6 and support plates 7 support the turntable 9 and the upper grinding disc 3, preventing the upper grinding disc 3 from directly pressing against the lower grinding disc 4. The annular slide rail 8 also facilitates the rotation of the turntable 9 and the upper grinding disc 3, preventing misalignment.

[0034] The extrusion mechanism also includes a positioning groove 10, a positioning plate 11, fixing bolts 12, a gear ring 13, a gear 14, and a first motor 15. The upper grinding disc 3 is equipped with multiple positioning plates 11, which are positioned within the positioning groove 10. Multiple fixing bolts 12 are installed on the positioning plates 11. A gear ring 13 is positioned on the outer side of the turntable 9, meshing with the gear 14. The gear 14 is connected to the first motor 15. The upper grinding disc 3 is fixed to the turntable 9 by the multiple positioning plates 11 and the positioning groove 10. The upper grinding disc 3 rotates together with the turntable 9. The motor drives the gear 14 to rotate, which in turn drives the gear ring 13 and the turntable 9 to rotate. The reduction speed of the gear 14 and the gear ring 13 amplifies the torque, improving the mechanical dispersing effect of the upper grinding disc 3 on the clumps of steel fibers.

[0035] A feed hopper 16 is installed at the feed hole 5 of the upper grinding disc 3. A spiral scraper 17 is installed at the lower end of the upper grinding disc 3. A distribution groove 18 and an extrusion groove 19 are installed at the upper end of the lower grinding disc 4. The distribution groove 18 is located in the middle of the lower grinding disc 4 and is connected to the extrusion groove 19. The upper surface of the extrusion groove 19 is inclined, and the depth of the extrusion groove 19 becomes shallower from the middle of the lower grinding disc 4 to the outside. By setting the spiral scraper 17, the upper grinding disc 3 drives the steel fibers to move from the center to the outside during rotation, so that the steel fibers enter the extrusion groove 19 from the distribution groove 18. Through the extrusion effect of the extrusion groove 19 and the spiral scraper 17, the steel fibers are broken up. The depth of the extrusion groove 19 becomes shallower from the middle of the lower grinding disc 4 to the outside. The closer to the outside, the finer and more dispersed the clumps of steel fibers become, thus achieving continuous extrusion.

[0036] The dispersing mechanism includes an air passage 20, air inlets 21, an air chamber 22, and a high-pressure air pump 23. The air passage 20 is located inside the spiral scraper 17. Multiple air inlets 21 are provided on the spiral scraper 17, and the air inlets 21 are connected to the air passage 20. The air passage 20 communicates with the air chamber 22, which is located inside the upper grinding disc 3 and communicates with the high-pressure air pump 23. The high-pressure air pump 23 generates compressed air, which enters the air passage 20 and air inlets 21 of the spiral scraper 17 through the air chamber 22. The air inlets 21 blow out high-pressure air, forming an air vortex between the spiral scrapers 17, which assists in propelling the steel fibers.

[0037] The dispersing mechanism also includes an annular groove 24, a connecting sleeve 25, a venting chamber 26, a sealing ring 27, and a venting hole 28. The air chamber 22 is provided with the venting hole 28, which communicates with the feed hole 5 of the upper grinding disc 3. The venting hole 28 is inclined downwards from the air chamber 22 to the feed hole 5. An annular groove 24 is provided on the air chamber 22, and a connecting sleeve 25 is installed inside the annular groove 24. Multiple sealing rings 27 are provided on the outside of the connecting sleeve 25. A venting chamber 26 is provided inside the connecting sleeve 25, communicating with the air chamber 22 and the high-pressure air pump 23. High-pressure air generated by the high-pressure air pump 23 enters the air chamber 22 through the venting chamber of the connecting sleeve 25. The connecting sleeve 25 remains stable during the rotation of the upper grinding disc 3 to prevent misalignment between the connecting sleeve 25 and the high-pressure air pump 23. The venting hole 28 in the air chamber 22 communicates with the feed hole 5, allowing the high-pressure air to assist the steel fibers in moving downwards, making the feeding of the steel fibers smoother.

[0038] The dispersion mechanism also includes a mounting groove 29, connecting platforms 30, a torsion spring 31, a connecting shaft 32, and a lever 33. The mounting groove 29 is located within the extrusion groove 19 of the lower grinding disc 4, at the edge of the lower grinding disc 4, and its height is lower than that of the extrusion groove 19. Multiple connecting platforms 30 are provided within the mounting groove 29, and the connecting platforms 30 are rotatably connected to the connecting shaft 32. The connecting shaft 32 is connected to the lever 33, and a torsion spring 31 is provided on the connecting shaft 32. As the steel fibers move outward from the lower grinding disc 4, they impact the lever 33. The lever 33 oscillates under the action of the torsion spring 31, throwing the steel fibers outward and improving the dispersion effect of the steel fibers.

[0039] The mixing mechanism includes a material guide chamber 34, a discharge pipe 35, a main shaft 36, a second motor 37, mixing blades 38, a mounting platform 39, positioning posts 40, and positioning holes 41. The main shaft 36 is vertically installed inside the mixing drum 2 and is connected to the second motor 37. Multiple mixing blades 38 are arranged on the outside of the main shaft 36. A mounting platform 39 is installed at the upper end of the main shaft 36, and multiple positioning posts 40 are installed on the mounting platform 39. Multiple positioning holes 41 that mate with the positioning posts 40 are provided on the lower grinding disc 4. The material guide chamber 34 is located on the upper outer side of the mixing drum 2, and the discharge pipe 35 is located at the bottom of the mixing drum 2. The second motor 37 drives the main shaft 36 and the mixing blades 38 to rotate, mixing the concrete and steel fibers inside the mixing drum 2 through the mixing blades 38, thoroughly mixing the steel fibers and concrete. The positioning posts 40 and the mounting platform 39 drive the lower grinding disc 4 to rotate.

[0040] Working principle: Concrete enters the mixing drum 2 through the feed chamber 34. Collected steel fibers are put into the feed hopper 16. The first motor 15, the second motor 37 and the high-pressure air pump 23 are turned on. The high-pressure gas generated by the high-pressure air pump 23 is blown into the feed hole 5 through the air chamber 22. The high-pressure gas drives the steel fibers to move downward. The steel fibers enter between the upper grinding disc 3 and the lower grinding disc 4. The relative rotation of the upper grinding disc 3 and the lower grinding disc 4 mechanically disperses the clumps of steel fibers. The lower surface of the upper grinding disc 3 is equipped with a spiral scraper 17. The spiral scraper 17 and the cyclone generated by the spiral scraper 17 drive the steel fibers to move from the center to the outside. The steel fibers are then thrown into the concrete by the paddle 33. The concrete and steel fibers are fully mixed by the mixing blades 38.

[0041] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A steel fiber reinforced concrete mixer, comprising a support frame (1) and a mixing drum (2), characterized in that: A stirring mechanism is provided inside the stirring drum (2). An extrusion mechanism and a dispersion mechanism are provided on the stirring mechanism. The extrusion mechanism includes an upper grinding disc (3) and a lower grinding disc (4). The upper grinding disc (3) and the lower grinding disc (4) are coaxially arranged. The upper grinding disc (3) and the lower grinding disc (4) rotate in opposite directions or the lower grinding disc (4) remains stationary. The upper grinding disc (3) is provided with a feed hole (5). The upper grinding disc (3) is provided with a dispersion mechanism. A feed hopper (16) is provided at the feed hole (5) of the upper grinding disc (3). A spiral scraper (17) is provided at the lower end of the upper grinding disc (3). A material distribution groove (18) and an extrusion groove (19) are provided at the upper end of the lower grinding disc (4). The material distribution groove (18) is located in the middle of the lower grinding disc (4). The material distribution groove (18) is connected to the extrusion groove (19). The upper surface of the extrusion groove (19) is an inclined surface. The depth of the extrusion groove (19) becomes shallower from the middle of the lower grinding disc (4) to the outside. The dispersing mechanism includes an air passage (20), an air blowing hole (21), an air chamber (22), and a high-pressure air pump (23). The air passage (20) is located inside the spiral scraper (17). The spiral scraper (17) is provided with multiple air blowing holes (21). The air blowing holes (21) are connected to the air passage (20). The air passage (20) is connected to the air chamber (22). The air chamber (22) is located inside the upper grinding disc (3). The air chamber (22) is connected to the high-pressure air pump (23).

2. A steel fiber reinforced concrete mixer according to claim 1, characterized in that: The extrusion mechanism includes a support rod (6), a support plate (7), a slide rail (8), and a turntable (9). Multiple support rods (6) are evenly arranged in the upper part of the mixing cylinder (2). The multiple support rods (6) are located in the same plane. The multiple support rods (6) are connected to the support plate (7). An annular slide rail (8) is provided on the support plate (7). The turntable (9) slides on the slide rail (8). The turntable (9) is connected to the upper grinding disc (3).

3. A steel fiber reinforced concrete mixer according to claim 2, characterized in that: The extrusion mechanism also includes a positioning groove (10), a positioning plate (11), a fixing bolt (12), a gear ring (13), a gear (14), and a first motor (15). The upper grinding disc (3) is provided with multiple positioning plates (11), which are located in the positioning groove (10). The positioning plate (11) is provided with multiple fixing bolts (12). The gear ring (13) is provided on the outside of the turntable (9). The gear ring (13) meshes with the gear (14), and the gear (14) is connected to the first motor (15).

4. A steel fiber reinforced concrete mixer according to claim 1, characterized in that: The dispersion mechanism further includes an annular groove (24), a connecting sleeve (25), an air chamber (26), a sealing ring (27), and an air guide hole (28). The air chamber (22) is provided with an air guide hole (28), which is connected to the feed hole (5) of the upper grinding disc (3). The air guide hole (28) is inclined downward from the air chamber (22) to the feed hole (5). The air chamber (24) is provided on the air chamber (22). The connecting sleeve (25) is provided inside the annular groove (24). Multiple sealing rings (27) are provided on the outside of the connecting sleeve (25). The air chamber (26) is provided inside the connecting sleeve (25). The air chamber (26) is connected to the air chamber (22) and the air chamber (26) is connected to the high-pressure air pump (23).

5. A steel fiber reinforced concrete mixer according to claim 4, characterized in that: The dispersing mechanism also includes a mounting groove (29), a connecting platform (30), a torsion spring (31), a connecting shaft (32), and a paddle (33). The mounting groove (29) is located in the extrusion groove (19) of the lower grinding disc (4). The mounting groove (29) is located at the edge of the lower grinding disc (4). The height of the mounting groove (29) is lower than that of the extrusion groove (19). Multiple connecting platforms (30) are provided in the mounting groove (29). The connecting platform (30) is rotatably connected to the connecting shaft (32). The connecting shaft (32) is connected to the paddle (33). A torsion spring (31) is provided on the connecting shaft (32).

6. A steel fiber reinforced concrete mixer according to claim 5, characterized in that: The stirring mechanism includes a material guiding chamber (34), a discharge pipe (35), a main shaft (36), a second motor (37), stirring blades (38), a mounting platform (39), positioning columns (40), and positioning holes (41). The main shaft (36) is vertically arranged inside the stirring cylinder (2). The main shaft (36) is connected to the second motor (37). Multiple stirring blades (38) are arranged on the outside of the main shaft (36). The mounting platform (39) is arranged at the upper end of the main shaft (36). Multiple positioning columns (40) are arranged on the mounting platform (39). Multiple positioning holes (41) that cooperate with the positioning columns (40) are arranged on the lower grinding disc (4). The material guiding chamber (34) is arranged on the upper part of the outside of the stirring cylinder (2). The discharge pipe (35) is arranged at the bottom of the stirring cylinder (2).

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