A high-efficiency intelligent rotor sand mixer with a rotating base

Abstract

The application belongs to the technical field of sand mixers, and particularly relates to a bottom-plate rotary high-efficiency intelligent rotor sand mixer, which comprises a mounting disc, a sand mixing barrel is fixedly connected to the mounting disc through connecting legs, a baffle is hingedly connected to the front face of the sand mixing barrel, a discharge port is formed in the position corresponding to the baffle on the front face of the sand mixing barrel, a control cylinder is hingedly connected to the front face of the baffle, and the other end of the control cylinder is hingedly connected to the front face of the sand mixing barrel. In the application, the forward and reverse rotation and three-layer disturbance make the large sand lumps be torn and broken in two directions, the mixing process of water and powder is more synchronous, the wet material is rapidly deagglomerated under the strong action of multiple shearing forces, synchronously diffused and uniformly coated on the surface of sand particles, the film thickness of the surface of sand particles is more uniform, and high-quality foundation is provided for subsequent processes. The water penetration path is greatly shortened under the influence of the design, the production efficiency is greatly improved, and the raw materials can fully participate in the mixing process.

Description

Technical Field

[0001] This invention belongs to the field of sand mixer technology, specifically a chassis-rotating high-efficiency intelligent rotor sand mixer. Background Technology

[0002] Wet molding clay sand is the core molding material in wet molding casting, and its mixing quality directly determines the dimensional accuracy, surface quality, and yield of the castings. The mixing process of wet molding clay sand is essentially to achieve a uniform mixture of quartz sand particles with bentonite, water, and additives, and to form a continuous and complete bentonite bonding film on the surface of the sand particles, while avoiding excessive crushing of sand particles and over-grinding and aging of molding sand. It is a complex process that combines physical mixing and colloidal activation.

[0003] Currently, chassis-mounted rotary rotor sand mixers are the mainstream equipment for mixing wet clay sand, typically employing a two-stage drive structure of "low-speed chassis rotation + fixed / follow-up scraper + unidirectional high-speed rotor". However, existing equipment still faces the following common industry-wide technical bottlenecks in long-term application: Traditional equipment relies solely on the unidirectional rotation of the chassis to drive material circulation, with scrapers mostly being either motion-driven or fixed, lacking active forced convection capability. This unidirectional mixing method easily creates dry sand retention zones at the corners of the cylinder wall and inside the material layer. After adding water, dry material clumps and overly wet mud clumps are easily formed in some areas, directly leading to uneven distribution of moisture and binder in the molding sand, becoming a significant cause of porosity and sand adhesion defects in castings. Existing equipment mostly uses straight blade rotors, relying on rigid impact and shearing as the main mixing methods, lacking flexible kneading and interlayer friction between sand particles. Bentonite is difficult to form a complete and uniform coating film on the surface of sand particles, resulting in large fluctuations in key properties such as wet compressive strength and permeability of molding sand, which cannot consistently meet the production requirements of high-quality castings. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a chassis-rotating high-efficiency intelligent rotor sand mixer. This invention primarily addresses the problems of existing technologies that easily result in mixing dead zones and poor final mixing stability.

[0005] The technical solution adopted by this invention to solve its technical problem is: a chassis-rotating high-efficiency intelligent rotor sand mixer, including a mounting plate; a sand mixing cylinder is fixedly connected to the mounting plate via connecting legs; a baffle is hinged to the front of the sand mixing cylinder; a discharge port is opened on the front of the sand mixing cylinder corresponding to the position of the baffle; a control cylinder is hinged to the front of the baffle; the other end of the control cylinder is hinged to the front of the sand mixing cylinder; a guide hopper is installed on the front of the sand mixing cylinder; a first bearing is installed at the center position under the sand mixing cylinder; a rotating cylinder is installed inside the first bearing; a chassis is installed at the top of the rotating cylinder; a first gear is installed outside the rotating cylinder; a second gear meshes with the side of the first gear; the second gear... A first motor is mounted on the wheel outside the mixing cylinder. A third gear is mounted on the output shaft above the first motor. A gear ring meshes with the third gear. A rotating ring is mounted on the inner wall of the gear ring. A second bearing is mounted inside the rotating ring outside the mixing cylinder. Two connecting seats are mounted outside the rotating ring. Rotating seats are mounted on the two connecting seats. A rotor mechanism is connected through the rotating seats. A fifth bearing is mounted inside the rotating cylinder. A connecting cylinder is rotatably connected inside the fifth bearing. A stirring rod is provided on the part of the connecting cylinder located on the upper side of the chassis. A sixth gear is mounted outside the connecting cylinder. A seventh gear meshes with the sixth gear. A third motor is mounted on the mounting plate outside the seventh gear.

[0006] As a further description of the above technical solution, the stirring rod rotates along its concave direction, the rotation direction of the base is the same as the rotation direction of the rotating seat, and the rotation direction of the stirring rod is opposite to the rotation direction of the rotating seat.

[0007] As a further description of the above technical solution, a cleaning block is installed at one end of the stirring rod near the inner wall of the mixing cylinder, and the cleaning block and the stirring rod are located between the chassis and the rotor mechanism.

[0008] As a further description of the above technical solution, a fourth bearing is connected through the inner wall of the connecting cylinder, a lead screw is rotatably connected inside the fourth bearing, a sleeve is installed at the bottom end of the lead screw, a second threaded seat is externally threaded to the lead screw, a sliding cylinder is slidably connected to the second threaded seat, the stirring rod is installed outside the sliding cylinder, a second sliding groove is opened on the outside of the connecting cylinder, the sliding cylinder is slidably disposed in the second sliding groove, a sealing gasket is installed on the lower annular surface of the sliding cylinder, a rubber ring is installed on the upper annular surface of the sliding cylinder, and the rubber ring is installed outside the connecting cylinder.

[0009] As a further description of the above technical solution, four limiting posts are installed on the upper stepped surface of the connecting cylinder, and a limiting groove is opened on the upper annular surface of the sliding cylinder, with the limiting posts slidably connected in the limiting groove.

[0010] As a further description of the above technical solution, the rotor mechanism includes a second motor mounted on a rotating base. The output shaft of the second motor is fixedly connected to a fourth gear. A fifth gear meshes with the side of the fourth gear. A hollow rotating shaft is installed through the fifth gear. The rotating shaft is rotatably connected inside the rotating base. Three first stirring blades are provided inside the rotating shaft. Three second stirring blades are installed outside the rotating shaft at a position below the first stirring blades.

[0011] As a further description of the above technical solution, both the first stirring blade and the second stirring blade are arc-shaped, and the rotation direction of both the first stirring blade and the second stirring blade is towards their concave surface.

[0012] As a further description of the above technical solution, the inner wall of the rotating shaft is provided with a third bearing, a rotating tube is installed inside the third bearing, the rotating tube is externally threaded with a first threaded seat, three first sliding grooves are opened on the outside of the rotating shaft, the first stirring blade is slidably connected in the first sliding groove, a rotating block is installed outside the rotating tube, a limiting frame is fitted around the rotating block, an elastic telescopic rod is installed below the limiting frame, the elastic telescopic rod is installed at the top of the rotating shaft, a sealing plate is installed outside the first stirring blade, the sealing plate is slidably connected to the outside of the rotating shaft, and the sealing plate seals the first sliding groove during the vertical movement of the first stirring blade.

[0013] As a further description of the above technical solution, a connecting hole is provided inside the rotating tube, the first stirring blade is hollow, an air outlet is provided on the convex surface of the first stirring blade, the position of the connecting hole corresponds to the position of the first stirring blade, and the first stirring blade is connected to the connecting hole through a hollow rotating shaft, a first rotating joint is installed at the top of the rotating tube, an air blowing pipe is connected through the rotating seat, a vent hole is provided at the bottom end of the side of the air blowing pipe, and a second rotating joint is installed at the top of the air blowing pipe.

[0014] As a further description of the above technical solution, the air outlet is a cone shape with a smaller outer diameter and a larger inner diameter.

[0015] The beneficial effects of this invention are as follows: 1. In this invention, the connecting cylinder drives the stirring rod to rotate, the chassis and rotating seat rotate stably counterclockwise, while the stirring rod rotates efficiently clockwise. This counter-rotation design generates a powerful synergistic effect. The chassis and the rotor mechanism that rotates with the rotating seat drive the raw material to rotate counterclockwise; while the stirring rod drives the raw material to rotate clockwise. The raw material undergoes all-round, multi-angle tumbling and kneading within the three layers. The rotation speed of the three layers causing the raw material to tumble varies, with the bottom layer rotating relatively slowly, the middle layer rotating at a moderate speed, and the top layer rotating the fastest. This speed difference... The layered design greatly enhances the kneading and coating effect between the raw materials in each layer, resulting in a significant improvement in the mixing quality of the raw materials. The forward and reverse rotation and three-layer disturbance cause large sand clumps to be torn and broken up in both directions, making the mixing process of adding water and powder more synchronized. Under the strong action of multiple shear forces, the wet material quickly deagglomerates, diffuses synchronously, and evenly coats the surface of the sand particles, making the film thickness on the surface of the sand particles more uniform, providing a high-quality foundation for subsequent processes. The water penetration path is greatly shortened under the influence of this design, which greatly improves production efficiency and ensures that the raw materials can fully participate in the mixing process.

[0016] 2. In this invention, the third motor precisely drives the sixth gear and the connecting cylinder to rotate via the seventh gear. The gears work closely together, ensuring stable and efficient power transmission. The connecting cylinder drives the stirring rod to rotate along the concave direction, guiding the sand particles to slide along the arc surface, converting "impact energy" into "interlayer grinding friction energy," which meets the needs of clay sand to "mix evenly, coat with a film, and prevent breakage." The concave surface of the stirring rod blades faces the direction of rotor rotation, forming a "spoon-shaped" curved surface that can hold and guide the sand material, avoiding hard shearing and allowing the materials to be gently kneaded together, preventing the raw materials from breaking. Under this action, the raw materials are fully ground, and the bentonite film evenly coats the sand particles, greatly improving the mixing quality of the raw materials. This provides a guarantee for the high strength, high toughness, and good surface quality of the castings, reduces defects, and improves the product qualification rate and stability.

[0017] 3. The controller of this invention precisely controls the operation of the second motor. After the second motor starts, it drives the rotating shaft, the first stirring blade, and the second stirring blade to rotate flexibly. The first stirring blade quickly disperses the floating sand, preventing sand particles from accumulating and affecting the mixing effect. The second stirring blade focuses on mixing the bottom layer of wet sand, ensuring that every part of the wet sand can fully participate in the mixing. Through this layered mixing design, multi-layer mixing is achieved, allowing the first and second stirring blades to more fully and thoroughly stir and mix the raw materials, greatly improving the mixing efficiency. During operation, the ingenious design of the chassis and stirring rod rotating in opposite directions at different speeds drives the material in the cylinder to form bidirectional forced convection, disturbing the dry sand clumps stuck at the edges, and completely eliminating the mixing dead corners existing on the cylinder wall and corners. In such a dynamic environment, the raw materials can be mixed in all directions without dead corners. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the sand mixing cylinder viewed from below in this invention; Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the sand mixing cylinder in this invention; Figure 4 This is a three-dimensional cross-sectional structural diagram of the chassis in this invention; Figure 5 This is the present invention. Figure 4 Enlarged structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the chassis in this invention, viewed from below. Figure 7 This is a schematic diagram of the three-dimensional cross-section of the rotating shaft in this invention; Figure 8 This is the present invention. Figure 7 Enlarged structural diagram of section B; Figure 9 This is the present invention. Figure 7 Enlarged structural diagram of section C; Figure 10 This is a schematic diagram of the three-dimensional cross-sectional structure of the first stirring blade in this invention.

[0020] In the diagram: 1. Mounting plate; 2. Connecting leg; 3. Mixing cylinder; 4. Baffle; 5. Control cylinder; 6. Guide hopper; 7. First bearing; 8. Rotating cylinder; 9. First gear; 10. Chassis; 11. Second gear; 12. First motor; 13. Third gear; 14. Gear ring; 15. Rotating ring; 16. Second bearing; 17. Connecting seat; 18. Rotating seat; 19. Rotor mechanism; 191. Second motor; 192. Fourth gear; 193. Fifth gear; 194. Rotating shaft; 195. First sliding groove; 196. First stirring blade; 197. First threaded seat; 198. Rotating tube; 199. 9. Third bearing; 20. Connecting cylinder; 21. Sixth gear; 22. Stirring rod; 23. Seventh gear; 24. Third motor; 25. Second rotary joint; 26. Cleaning block; 27. Sliding cylinder; 28. Second sliding groove; 29. ​​Second threaded seat; 30. Lead screw; 31. Fourth bearing; 32. Insert sleeve; 33. Fifth bearing; 34. Sealing gasket; 35. Limiting groove; 36. Limiting post; 37. Rubber ring; 38. Rotating block; 39. Limiting frame; 40. Elastic telescopic rod; 41. First rotary joint; 42. Connecting hole; 43. Air outlet; 44. Second stirring blade; 45. Air blowing pipe. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 10 As shown, a chassis-rotating high-efficiency intelligent rotor sand mixer includes a mounting plate 1; a sand mixing cylinder 3 is fixedly connected to the mounting plate 1 via connecting legs 2; a baffle 4 is hinged to the front of the sand mixing cylinder 3; a discharge port is opened on the front of the sand mixing cylinder 3 corresponding to the position of the baffle 4; a control cylinder 5 is hinged to the front of the baffle 4; the other end of the control cylinder 5 is hinged to the front of the sand mixing cylinder 3; a guide hopper 6 is installed on the front of the sand mixing cylinder 3; a first bearing 7 is installed at the center position under the sand mixing cylinder 3; a rotating cylinder 8 is installed inside the first bearing 7; a chassis 10 is installed at the top of the rotating cylinder 8; a first gear 9 is installed outside the rotating cylinder 8; a second gear 11 meshes with the side of the first gear 9; a first motor 12 is installed on the second gear 11 and located outside the sand mixing cylinder 3; the first motor... A third gear 13 is installed on the output shaft above 12. A gear ring 14 meshes with the third gear 13. A rotating ring 15 is installed on the inner wall of the gear ring 14. A second bearing 16 located outside the sand mixing cylinder 3 is installed inside the rotating ring 15. Two connecting seats 17 are installed outside the rotating ring 15. A rotating seat 18 is installed on the two connecting seats 17. A rotor mechanism 19 is connected through the rotating seat 18. A fifth bearing 33 is installed inside the rotating cylinder 8. A connecting cylinder 20 is rotatably connected inside the fifth bearing 33. A stirring rod 22 is provided on the part of the connecting cylinder 20 located on the upper side of the chassis 10. A sixth gear 21 is installed outside the connecting cylinder 20. A seventh gear 23 meshes with the sixth gear 21. A third motor 24 located on the mounting plate 1 is installed outside the seventh gear 23.

[0023] When wet clay sand needs to be mixed, the raw materials are directly poured into the mixing drum 3. Then, the controller controls the operation of the first motor 12 and the third motor 24. The first motor 12 controls the rotation of the first gear 9 and the gear ring 14 through the second gear 11 and the third gear 13, thereby causing the first gear 9 to drive the rotating drum 8 and the chassis 10 to rotate. At the same time, the gears control the rotation of the rotating ring 15, the connecting seat 17, and the rotating seat 18. The rotation of the rotating seat 18 drives the rotating shaft 194 to rotate. The third motor 24 drives the sixth gear 21 and the connecting drum 20 to rotate through the seventh gear 23, thereby causing the connecting drum 20 to rotate. The stirring rod 22 rotates, causing the base 10 and the rotating seat 18 to rotate counterclockwise, while the stirring rod 22 rotates clockwise. The base 10 and the rotor mechanism 19, which rotates with the rotating seat 18, drive the raw materials to move counterclockwise, and the stirring rod 22 drives the raw materials to rotate clockwise, thus causing the raw materials to be turned and kneaded in three layers. The speed at which the raw materials are turned over varies among the three layers, with the bottom layer rotating the slowest, the middle layer rotating the fastest, and the top layer rotating the fastest. This differential speed multi-layer mixing mechanism greatly enhances the kneading and coating effect between the layers of raw materials, thereby significantly improving the mixing quality of the raw materials.

[0024] like Figures 1 to 3 As shown, the stirring rod 22 rotates along its concave direction, the rotation direction of the base 10 is the same as the rotation direction of the rotating seat 18, and the rotation direction of the stirring rod 22 is opposite to the rotation direction of the rotating seat 18.

[0025] The third motor 24 drives the sixth gear 21 and the connecting cylinder 20 to rotate via the seventh gear 23, thereby causing the connecting cylinder 20 to drive the stirring rod 22 to rotate. During the rotation of the stirring rod 22, it rotates along the concave direction. The arc-shaped stirring rod 22 can guide the sand particles to slide along the arc surface, converting "impact energy" into "interlayer rubbing friction energy". This perfectly meets the core requirements of clay sand: "it must be mixed evenly, coated, and prevented from breaking". Moreover, the concave surface of the blade faces the direction of rotor rotation. This "spoon-shaped" curved surface can gently hold and guide the sand material, forming a rubbing between materials instead of hard shearing, thereby preventing the raw materials from being rubbed and broken. This allows the raw materials to grind against each other, resulting in a more uniform bentonite film coating, which in turn improves the quality of raw material mixing and ensures the quality of castings.

[0026] like Figures 1 to 3 As shown, a cleaning block 26 is installed at one end of the stirring rod 22 near the inner wall of the sand mixing cylinder 3. The cleaning block 26 and the stirring rod 22 are located between the chassis 10 and the rotor mechanism 19.

[0027] While the stirring rod 22 rotates, it drives the cleaning block 26 to rotate, thereby pushing the raw materials accumulated on the inner wall of the mixing cylinder 3, preventing the raw materials from having agitation dead corners on the inner wall of the mixing cylinder 3, thus making the raw materials more fully mixed and ensuring better mixing quality.

[0028] like Figures 4 to 5 As shown, a fourth bearing 31 is connected through the inner wall of the connecting cylinder 20. A lead screw 30 is rotatably connected inside the fourth bearing 31. A sleeve 32 is installed at the bottom end of the lead screw 30. A second threaded seat 29 is threaded to the external of the lead screw 30. A sliding cylinder 27 is slidably connected to the external of the second threaded seat 29. A stirring rod 22 is installed outside the sliding cylinder 27. A second sliding groove 28 is opened on the outside of the connecting cylinder 20. The sliding cylinder 27 is slidably disposed in the second sliding groove 28. A sealing gasket 34 is installed on the lower annular surface of the sliding cylinder 27. A rubber ring 37 is installed on the upper annular surface of the sliding cylinder 27. The rubber ring 37 is installed outside the connecting cylinder 20.

[0029] After prolonged use, the raw materials trapped between the stirring rod 22 and the base 10 will cause wear on the bottom of the stirring rod 22, resulting in a larger gap between the stirring rod 22 and the base 10. Some raw materials will be missed at the bottom of the stirring rod 22 and cannot be fully stirred and mixed, resulting in a reduced stirring and mixing effect. Therefore, by inserting a wrench into the insert sleeve 32 and controlling the rotation of the connecting cylinder 20, the second threaded seat 29 is moved downward, which in turn controls the sliding cylinder 27 to move downward, adjusting the distance between the stirring rod 22 and the base 10. This ensures that a large amount of raw materials will not be missed and cannot be stirred, reducing the probability of stirring dead zones and thus improving the quality of raw material mixing.

[0030] like Figure 5 As shown, four limiting posts 36 are installed on the upper stepped surface of the connecting cylinder 20, and a limiting groove 35 is opened on the upper annular surface of the sliding cylinder 27. The limiting posts 36 are slidably connected in the limiting groove 35.

[0031] When the sliding cylinder 27 moves downward, the limiting rod will move within the limiting groove 35 to guide the vertical height adjustment of the stirring rod 22, thereby ensuring the stable operation of the stirring rod 22 during height adjustment and increasing the stability of the stirring rod 22 during rotation.

[0032] like Figures 1 to 3 and Figures 7 to 9 As shown, the rotor mechanism 19 includes a second motor 191 mounted on a rotating base 18. The output shaft of the second motor 191 is fixedly connected to a fourth gear 192. A fifth gear 193 meshes with the side of the fourth gear 192. A hollow rotating shaft 194 is mounted through the fifth gear 193. The rotating shaft 194 is rotatably connected inside the rotating base 18. Three first stirring blades 196 are provided inside the rotating shaft 194. Three second stirring blades 44 are installed outside the rotating shaft 194 at a position below the first stirring blades 196.

[0033] The raw materials are directly poured into the mixing drum 3, and the first rotary joint 41 and the second rotary joint 25 are connected to an external air pump. Then, the controller controls the operation of the first motor 12, the second motor 191, and the third motor 24. The first motor 12 controls the rotation of the first gear 9 and the gear ring 14 through the second gear 11 and the third gear 13, so that the first gear 9 drives the rotating drum 8 and the chassis 10 to rotate. At the same time, the gear controls the rotation of the rotating ring 15, the connecting seat 17, and the rotating seat 18. The rotation of the rotating seat 18 drives the rotating shaft 194 to rotate. The controller controls the operation of the second motor 191. The operation of the second motor 191 drives the rotating shaft 194, the first stirring blade 196, and the second stirring blade 44 to rotate. The first stirring blade 196 disperses the floating sand in the upper layer, and the second stirring blade 44 mixes the bottom wet sand in the lower layer, realizing multi-layer mixing, so that the stirring and mixing of the raw materials by the first stirring blade 196 and the second stirring blade 44 is more thorough. During operation, the chassis 10 and the stirring rod 22 rotate in opposite directions at different speeds, causing the material in the mixing cylinder 3 to form a bidirectional forced convection. The dry sand clumps stuck at the edge are continuously pushed towards the central mixing zone by the counter-rotating stirring rod 22, completely eliminating the mixing dead corners of the cylinder wall and edges, and making the mixing effect of the raw materials better.

[0034] like Figures 7 to 9 As shown, both the first stirring blade 196 and the second stirring blade 44 are arc-shaped, and the rotation direction of both the first stirring blade 196 and the second stirring blade 44 is towards their concave surface.

[0035] When the second motor 191 is running, it drives the rotating shaft 194 to rotate, which in turn drives the first stirring blade 196 and the second stirring blade 44 to rotate. The first stirring blade 196 and the second stirring blade 44, which rotate at high speed in the same direction, guide the sand material to slide with their arc-shaped streamlined curved surfaces. By replacing rigid impact with flexible rubbing between material layers, the sand particles are prevented from breaking and the molding sand is prevented from aging due to over-rolling. At the same time, it promotes the formation of a continuous and uniform coating film of bentonite on the surface of the sand particles, effectively improving the wet compressive strength and air permeability of the molding sand.

[0036] like Figures 8 to 10 As shown, a third bearing 199 is provided on the inner wall of the rotating shaft 194. A rotating tube 198 is installed inside the third bearing 199. A first threaded seat 197 is externally threaded onto the rotating tube 198. Three first sliding grooves 195 are provided on the outside of the rotating shaft 194. A first stirring blade 196 is slidably connected to the first sliding groove 195. A rotating block 38 is installed outside the rotating tube 198. A limiting frame 39 is provided on the outer sleeve of the rotating block 38. An elastic telescopic rod 40 is installed below the limiting frame 39. The elastic telescopic rod 40 is installed at the top of the rotating shaft 194. A sealing plate is installed outside the first stirring blade 196. The sealing plate is slidably connected to the outside of the rotating shaft 194, and the sealing plate seals the first sliding groove 195 during the vertical movement of the first stirring blade 196.

[0037] When there is a lot of raw material in the mixing cylinder 3 and the height of the raw material exceeds the first stirring blade 196, the first stirring blade 196 cannot stir the upper layer of raw material, resulting in a reduced dispersing effect on the upper layer of raw material clumps. At this time, the limiting frame 39 is directly pressed to separate from the rotating block 38, and then the rotating shaft 194 is rotated through the rotating block 38, so that the rotating shaft 194 drives the first threaded seat 197 and the first stirring blade 196 to move upward, thereby adjusting the first stirring blade 196 to the upper layer of raw material, ensuring the dispersing effect of the first stirring blade 196 on the upper layer of raw material, and thus ensuring the mixing quality of raw material.

[0038] like Figures 7 to 10As shown, a connecting hole 42 is provided inside the rotating tube 198, the first stirring blade 196 is hollow, and an air outlet 43 is provided on the convex surface of the first stirring blade 196. The position of the connecting hole 42 corresponds to the position of the first stirring blade 196, and the first stirring blade 196 is connected to the connecting hole 42 through a hollow rotating shaft 194. A first rotating joint 41 is installed at the top of the rotating tube 198, and an air blowing pipe 45 is connected through the rotating seat 18. The bottom end of the side of the air blowing pipe 45 is provided with separate air vents, and a second rotating joint 25 is installed at the top of the air blowing pipe 45.

[0039] The air pump introduces gas into the rotating pipe 198 and the blowing pipe 45 through the first rotary joint 41 and the second rotary joint 25, respectively. The gas in the rotating pipe 198 enters the first stirring blade 196 through the connecting hole 42, and then the gas in the first stirring blade 196 is blown into the raw material through the air outlet 43. At the same time, the blowing pipe 45 blows gas into the raw material from the middle part of the sand mixing cylinder 3. A small amount of air enters between the layers of raw material, which disperses the dense wet sand layer and improves the final air permeability of the molding sand. The continuous micro-airflow blows out from the air outlet 43 to form an air film. The wet bentonite sand is less likely to stick to the first stirring blade 196 and the second stirring blade 44, thereby increasing the quality of the mixing of the raw material by the first stirring blade 196 and the second stirring blade 44.

[0040] like Figure 10 As shown, the air outlet 43 is a cone shape with a smaller outer diameter and a larger inner diameter.

[0041] The air pump introduces gas into the rotating pipe 198 and the blowing pipe 45 through the first rotary joint 41 and the second rotary joint 25, respectively. The gas in the rotating pipe 198 enters the first stirring blade 196 through the connecting hole 42, and then the gas in the first stirring blade 196 is blown into the raw material through the air outlet 43. The small outer air outlet 43 can prevent the raw material in the mixing cylinder 3 from leaking into the first stirring blade 196, thereby ensuring that the first stirring blade 196 can smoothly and continuously blow air through the air outlet 43.

[0042] During operation, when mixing wet clay sand, the raw materials are directly poured into the mixing drum 3, and the first rotary joint 41 and the second rotary joint 25 are connected to an external air pump. Then, the controller controls the operation of the first motor 12, the second motor 191, and the third motor 24. The first motor 12 controls the rotation of the first gear 9 and the gear ring 14 through the second gear 11 and the third gear 13, thereby causing the first gear 9 to drive the rotating drum 8 and the chassis 10 to rotate. At the same time, the gears control the rotation of the rotating ring 15, the connecting seat 17, and the rotating seat 18. The rotation of motor 8 drives the rotating shaft 194 to rotate, thereby causing the second motor 191 to operate and drive the rotating shaft 194, the first stirring blade 196, and the second stirring blade 44 to rotate. The third motor 24 drives the sixth gear 21 and the connecting cylinder 20 to rotate through the seventh gear 23, thereby causing the connecting cylinder 20 to drive the sliding cylinder 27 and the stirring rod 22 to rotate. This causes the chassis 10 and the rotating seat 18 to rotate counterclockwise, and the stirring rod 22 to rotate clockwise. The chassis 10 and the rotor mechanism 19, which rotates with the rotating seat 18, drive the raw materials counterclockwise. The stirring rod 22 rotates the raw material clockwise, causing it to tumble and knead within three layers. Simultaneously, the first stirring blade 196 disperses the loose sand in the upper layer, while the second stirring blade 44 mixes the bottom layer of wet sand, achieving multi-layer mixing. At the same time, an air pump introduces gas through the first rotary joint 41 and the second rotary joint 25 into the rotating pipe 198 and the air blowing pipe 45, respectively. The gas in the rotating pipe 198 enters the first stirring blade 196 through the connecting hole 42, and then the gas in the first stirring blade 196 is blown into the raw material through the air outlet 43. At the same time, the air blowing pipe 45 blows gas from the middle part of the sand mixing cylinder 3 into the raw material, and a small amount of air enters between the layers of raw material, which disperses the dense wet sand layer and improves the final air permeability of the molding sand. The continuous micro airflow blows out from the air outlet 43 to form an air film, so that the wet bentonite sand does not easily stick to the first stirring blade 196 and the second stirring blade 44. After the wet molding clay sand is mixed, the controller controls the air pump, the first motor 12, the second motor 191 and the third motor 24 to stop working, and controls the baffle 4 to rotate upward by the control cylinder 5 to remove the wet molding clay sand.

[0043] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A chassis-rotating high-efficiency intelligent rotor sand mixer, comprising a mounting plate; characterized in that: A sand mixing cylinder is fixedly connected to the mounting plate via connecting legs. A baffle is hinged to the front of the sand mixing cylinder, and a discharge port is opened on the front of the sand mixing cylinder corresponding to the position of the baffle. A control cylinder is hinged to the front of the baffle, and the other end of the control cylinder is hinged to the front of the sand mixing cylinder. A guide hopper is installed on the front of the sand mixing cylinder. A first bearing is installed at the center position under the sand mixing cylinder, and a rotating cylinder is installed inside the first bearing. A base is installed at the top of the rotating cylinder, and a first gear is installed outside the rotating cylinder. A second gear meshes with the side of the first gear, and a first motor is installed on the second gear outside the sand mixing cylinder. A third gear is mounted on the output shaft above the machine. A gear ring meshes with the third gear. A rotating ring is mounted on the inner wall of the gear ring. A second bearing located outside the sand mixing cylinder is mounted inside the rotating ring. Two connecting seats are mounted outside the rotating ring. Rotating seats are mounted on the two connecting seats. A rotor mechanism is connected through the rotating seats. A fifth bearing is mounted inside the rotating cylinder. A connecting cylinder is rotatably connected inside the fifth bearing. A stirring rod is located on the upper side of the chassis outside the connecting cylinder. A sixth gear is mounted outside the connecting cylinder. A seventh gear meshes with the sixth gear. A third motor located on the mounting plate is mounted outside the seventh gear. A fourth bearing is connected through the inner wall of the connecting cylinder. A lead screw is rotatably connected inside the fourth bearing. A sleeve is installed at the bottom end of the lead screw. A second threaded seat is threaded onto the lead screw. A sliding cylinder is slidably connected to the second threaded seat. The stirring rod is installed outside the sliding cylinder. A second sliding groove is opened on the outside of the connecting cylinder. The sliding cylinder is slidably disposed in the second sliding groove. A sealing gasket is installed on the lower annular surface of the sliding cylinder. A rubber ring is installed on the upper annular surface of the sliding cylinder. The rubber ring is installed outside the connecting cylinder. The rotor mechanism includes a second motor mounted on a rotating base. The output shaft of the second motor is fixedly connected to a fourth gear. A fifth gear meshes with the side of the fourth gear. A hollow rotating shaft is installed through the fifth gear. The rotating shaft is rotatably connected inside the rotating base. Three first stirring blades are provided inside the rotating shaft. Three second stirring blades are installed outside the rotating shaft at a position below the first stirring blades.

2. The chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 1, characterized in that: The stirring rod has an arc-shaped structure and rotates along its concave surface. The rotation direction of the base is the same as that of the rotating seat, while the rotation direction of the stirring rod is opposite to that of the rotating seat.

3. The chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 2, characterized in that: A cleaning block is installed at one end of the stirring rod near the inner wall of the mixing cylinder, and the cleaning block and the stirring rod are located between the chassis and the rotor mechanism.

4. The chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 1, characterized in that: The upper stepped surface of the connecting cylinder is equipped with four limiting posts, and the upper annular surface of the sliding cylinder is provided with a limiting groove, and the limiting posts are slidably connected in the limiting groove.

5. A chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 4, characterized in that: Both the first and second stirring blades are arc-shaped, and the rotation direction of both the first and second stirring blades is towards their concave surfaces.

6. A chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 5, characterized in that: The inner wall of the rotating shaft is provided with a third bearing, and a rotating tube is installed inside the third bearing. The rotating tube is externally threaded with a first threaded seat. The rotating shaft has three first sliding grooves. The first stirring blade is slidably connected in the first sliding groove. A rotating block is installed outside the rotating tube. A limiting frame is fitted around the rotating block. An elastic telescopic rod is installed below the limiting frame. The elastic telescopic rod is installed at the top of the rotating shaft. A sealing plate is installed outside the first stirring blade. The sealing plate is slidably connected to the outside of the rotating shaft, and the sealing plate seals the first sliding groove during the vertical movement of the first stirring blade.

7. A chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 6, characterized in that: The rotating tube has a connecting hole inside. The first stirring blade is hollow. An air outlet is provided on the convex surface of the first stirring blade. The position of the connecting hole corresponds to the position of the first stirring blade. The first stirring blade is connected to the connecting hole through a hollow rotating shaft. A first rotating joint is installed at the top of the rotating tube. An air blowing pipe is connected through the rotating seat. Vent holes are provided at the bottom end of the side of the air blowing pipe. A second rotating joint is installed at the top of the air blowing pipe.

8. A chassis-rotating high-efficiency intelligent rotor sand mixer according to claim 7, characterized in that: The air outlet is a cone shape, smaller on the outside and larger on the inside.

Images