Anti-blocking device of precoated sand mixer

Abstract

The utility model relates to the field of sand mixers, and discloses an anti-blocking device of a precoated sand mixer, which comprises a stirring barrel, a feeding barrel is arranged above the stirring barrel, a discharge port is arranged at the bottom of the feeding barrel, polishing mechanisms are symmetrically arranged on two sides of the feeding barrel, each polishing mechanism comprises a rotating barrel rotationally connected to one side of the feeding barrel, and the rotating barrel is provided with a rotating shaft. A filter screen is fixedly installed at the end, close to the feeding cylinder, of the rotating cylinder, spiral conveying threads are arranged on the inner wall of the rotating cylinder, a plurality of grinding balls are arranged in the rotating cylinder, and a spiral feeding mechanism is arranged at the end, away from the feeding cylinder, of the rotating cylinder. The precoated sand grinding device has the advantages and effects that materials are ground, so that material particles are round, the finished product quality of precoated sand is ensured, and meanwhile, the mixing efficiency of the materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mixers, in particular to an anti-blocking device for a coated sand mixer. Background Art

[0002] Coated sand refers to molding sand or core sand whose surface is coated with a solid resin film before molding. Coated sand is primarily raw sand, typically natural silica sand or machine-made sand. To save energy and reduce production costs, a certain proportion of waste sand is often mixed in. Waste sand refers to the discarded molding sand used by foundries. After treatment to ensure its quality and performance meet requirements, it is then mixed with the treated raw sand in a sand mixer in a specific proportion before proceeding to the next step.

[0003] The Chinese utility model patent with authorization announcement number CN215941425U discloses a coated sand mixer with an anti-blocking function, including a mixing barrel, a first motor fixedly connected to the bottom of the mixing barrel, a rotating shaft arranged inside the mixing barrel and fixedly connected to the output shaft of the first motor, a grinding wheel fixedly connected to the rotating shaft, and a feeding device arranged on the top of the mixing barrel. The feeding device includes a feeding barrel arranged above the mixing barrel and connected to the mixing barrel through a feeding pipe, a feeding hopper arranged at the top of the feeding barrel, and an anti-blocking device arranged in the feeding barrel and used to prevent the feeding pipe from being blocked.

[0004] The aforementioned patent uses a roller placed above the mixing barrel to break up the material. The broken material then flows out through the feed hole on the isolation plate and into the mixing barrel, achieving uniform feeding and preventing the material from clogging the feed pipe. However, the roller can only break up the material and cannot grind the sand. The raw sand of the coated sand must have round particles to ensure good fluidity and filling properties, and to reduce the occurrence of casting defects such as air holes. Moreover, if the broken particles are larger than the feed hole, the larger sand particles will easily remain on the horizontal isolation plate and cannot be discharged, causing blockage. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-blocking device for a coated sand mixer, which has the effect of grinding materials to make material particles round, ensuring the quality of the finished product of the coated sand, and improving the mixing efficiency of the materials.

[0006] The above technical purpose of the present utility model is achieved through the following technical solutions: a device for preventing blocking of a coated sand mixer, comprising a mixing barrel, a feed barrel being provided above the mixing barrel, a discharge port being provided at the bottom of the feed barrel, grinding mechanisms being symmetrically provided on both sides of the feed barrel, the grinding mechanism comprising a rotating barrel rotatably connected to one side of the feed barrel, a filter being fixedly installed on one end of the rotating barrel close to the feed barrel, spiral conveying patterns being provided on the inner wall of the rotating barrel, a plurality of grinding balls being provided in the rotating barrel, and a spiral feeding mechanism being provided on the end of the rotating barrel away from the feed barrel.

[0007] By adopting the above technical solution, the two sides of the feed barrel are rotatably connected with a rotating drum, and a plurality of grinding balls are arranged in the rotating drum. The original sand and waste sand are respectively transported to the rotating drum through the spiral conveying mechanism on both sides of the feed barrel, and the rotating drum is driven to rotate. The material in the rotating drum is impacted and rubbed by the grinding balls and gradually ground into the required particle size. The qualified material enters the feed barrel through the filter screen and enters the mixing barrel through the discharge port at the bottom of the feed barrel for stirring. By grinding the waste sand and original sand, the material particles are made round, the generation of casting defects such as air holes is reduced, and the quality of the finished product of the coated sand is improved.

[0008] The utility model is further configured as follows: a driving disk is fixedly mounted on the outer wall of the rotating drum, a limiting tooth is fixedly mounted on the driving disk, a parallel mounting plate is fixedly mounted on the feeding drum, a driving shaft is rotatably connected between the two mounting plates, gears are fixedly mounted at both ends of the driving shaft, and the gears are engaged with the limiting teeth.

[0009] By adopting the above technical solution, the driving shaft rotates, causing the gears at both ends of the driving shaft to rotate, driving the driving disc to rotate, causing the drum to rotate, and the grinding balls in the drum to grind the material.

[0010] The present invention is further configured as follows: a first motor is fixedly mounted above the mixing barrel; a driving wheel is fixedly mounted on the output shaft of the first motor; a driven wheel is fixedly mounted on the driving shaft; and a synchronous belt is connected between the driving wheel and the driven wheel.

[0011] By adopting the above technical solution, the first motor drives the driving wheel to rotate, and drives the driven wheel to rotate through the synchronous belt, so that the drive shaft fixedly connected to the driven wheel rotates, thereby driving the rotating drum to rotate. One motor can drive two rotating drums to rotate, saving energy.

[0012] The utility model is further configured as follows: a rotating shaft is vertically connected to the mixing barrel, the upper end of the rotating shaft passes through the feed barrel, the upper end of the rotating shaft is rotatably connected to the feed barrel, a plurality of stirring rods are fixedly installed on the part of the rotating shaft located in the feed barrel, and a plurality of stirring blades are provided on the part of the rotating shaft located in the mixing barrel.

[0013] By adopting the above technical solution, the upper end of the rotating shaft is rotatably connected to the upper end of the feed barrel, and the lower end of the rotating shaft is rotatably connected to the lower end of the mixing barrel. The part of the rotating shaft located in the feed barrel is fixedly installed with a stirring rod, and the part of the lower end of the rotating shaft located in the mixing barrel is provided with stirring blades. When the rotating shaft rotates, the stirring rod at the upper end of the rotating shaft stirs the material in the feed barrel to prevent the material from being blocked at the discharge port, and the stirring blades at the lower end of the rotating shaft mix the material to mix the original sand and waste sand.

[0014] The utility model is further configured as follows: the lower end of the rotating shaft is rotatably connected to a mounting box, a plurality of the stirring blades are rotatably connected to the four walls of the mounting box, a stirring shaft is fixedly mounted on the stirring blade, the stirring shaft is rotatably connected to the mounting box, a small bevel gear is fixedly mounted on one end of the stirring shaft away from the stirring blade, the lower end of the rotating shaft passes through the mounting box and the upper end is fixedly connected to a large bevel gear, the large bevel gear is rotatably connected in the mounting box, and the large bevel gear is meshed with the small bevel gear.

[0015] By adopting the above technical solution, the rotating shaft rotates to drive the large gear to rotate, so that the small gear meshing with the large gear rotates, and the small gear drives the stirring shaft to rotate, so that the stirring blades rotate to mix the materials.

[0016] The present invention is further configured as follows: a bracket is fixedly installed on the bottom of the mixing barrel, a second motor is fixedly installed on the bottom of the mixing barrel, and an output shaft of the second motor passes through the mixing barrel and is fixedly connected to the installation box.

[0017] By adopting the above technical solution, the second motor drives the installation box to rotate, so that the stirring blades on the installation box rotate around the rotating shaft. While the stirring blades rotate on themselves, they also rotate around the rotating shaft, so that the materials are mixed more evenly.

[0018] The present invention is further configured as follows: a third motor is fixedly mounted on the feed barrel, and an output shaft of the third motor passes through the feed barrel and is fixedly connected to the rotating shaft.

[0019] By adopting the above technical solution, the third motor provides a power source for the rotation of the shaft.

[0020] The present invention is further configured as follows: the spiral feeding mechanism includes a support frame, a feeding barrel is fixedly mounted on the support frame, the feeding barrel is rotatably connected to the rotating drum, a feed hopper is provided above the feeding barrel, and a spiral conveying shaft is rotatably connected inside the feeding barrel.

[0021] By adopting the above technical solution, the material enters the feeding barrel through the feed hopper, and the spiral conveying shaft in the feeding barrel conveys the material to the rotating drum, and the rotating drum rotates to grind the material.

[0022] The present invention is further configured as follows: a discharge port is provided at the bottom of the mixing barrel.

[0023] By adopting the above technical solution, the mixed materials are discharged through the discharge port at the bottom of the mixing barrel.

[0024] The utility model is further configured as follows: a valve is provided on the discharge port.

[0025] By adopting the above technical solution, the valve can control the opening and closing of the discharge port.

[0026] The beneficial effects of the utility model are:

[0027] 1. The two sides of the feed drum are connected to the rotating drum, and multiple grinding balls are set in the drum. The original sand and waste sand are respectively transported to the drum through the spiral conveying mechanism on both sides of the feed drum. The drum is driven to rotate. The material in the drum is impacted and rubbed by the grinding balls and gradually ground into the required particle size. The qualified material enters the feed drum through the filter screen and enters the mixing barrel through the discharge port at the bottom of the feed drum for mixing. By grinding the waste sand and original sand, the material particles are made round, the occurrence of casting defects such as pores is reduced, and the quality of the finished coated sand is improved.

[0028] 2. The rotation of the shaft drives the large gear to rotate, which in turn rotates the small gear meshing with the large gear. The small gear drives the stirring shaft to rotate, which in turn rotates the stirring blades. At the same time, the second motor drives the mounting box to rotate, which in turn rotates the stirring blades on the mounting box around the shaft. The stirring blades rotate around the shaft while rotating on themselves, making the materials mixed more evenly.

[0029] 3. The part of the rotating shaft located in the feed barrel is fixed with a stirring rod, and the part of the lower end of the rotating shaft located in the mixing barrel is provided with stirring blades. When the rotating shaft rotates, the stirring rod at the upper end of the rotating shaft stirs the material in the feed barrel to prevent the material from being blocked at the discharge port, and the stirring blades at the lower end of the rotating shaft mix the material to mix the original sand and waste sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0032] Figure 2 It is a schematic diagram of the facade structure of the utility model.

[0033] Figure 3 It is an enlarged structural diagram of point A of the present utility model.

[0034] In the figure, 1. mixing barrel; 2. feeding barrel; 3. discharge port; 4. grinding mechanism; 41. rotating drum; 42. filter screen; 43. spiral conveying pattern; 44. grinding balls; 5. spiral conveying mechanism; 51. supporting frame; 52. feeding barrel; 53. feeding hopper; 54. spiral conveying shaft; 6. limiting plate; 7. limiting teeth; 8. mounting plate; 9. driving shaft; 10. gear; 11. first motor; 12. driving wheel; 13. driven wheel; 14. synchronous belt; 15. rotating shaft; 16. stirring rod; 17. mounting box; 18. stirring blade; 19. stirring shaft; 20. small bevel gear; 21. large bevel gear; 22. bracket; 23. second motor; 24. third motor; 25. discharge port; 26. valve. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0036] like Figure 1-3 As shown, a device for preventing blocking of a coated sand mixing machine comprises a mixing barrel 1, a bracket 22 is fixedly installed at the bottom of the mixing barrel 1, a discharge port 25 is provided at the bottom of the mixing barrel 1, a valve 26 is provided on the discharge port 25, a feeding barrel 2 is provided above the mixing barrel 1, a third motor 24 is fixedly installed on the feeding barrel 2, an output shaft of the third motor 24 passes through the feeding barrel 2 and is fixedly connected to the rotating shaft 15, a discharge port 25 is provided at the bottom of the feeding barrel 2, the discharge port 25 is connected to the center of the mixing barrel 1, grinding mechanisms 4 are symmetrically provided on both sides of the feeding barrel 2, the grinding mechanism 4 comprises a rotating barrel 41 rotatably connected to one side of the feeding barrel 2, and the rotating barrel 41 is fixedly installed with a rotating shaft near one end of the feeding barrel 2 The filter screen 42 and the inner wall of the rotating drum 41 are provided with a spiral conveying pattern 43, a number of grinding balls 44 are provided in the rotating drum 41, a driving disc is fixedly mounted on the outer wall of the rotating drum 41, a limiting tooth 7 is fixedly mounted on the driving disc, a parallel mounting plate 8 is fixedly mounted on the feeding drum 2, a driving shaft 9 is rotatably connected between the two mounting plates 8, gears 10 are fixedly mounted at both ends of the driving shaft 9, the gears 10 are engaged with the limiting teeth 7, a first motor 11 is fixedly mounted above the mixing barrel 1, a driving wheel 12 is fixedly mounted on the output shaft of the first motor 11, a driven wheel 13 is fixedly mounted on the driving shaft 9, and a synchronous belt 14 is connected between the driving wheel 12 and the driven wheel 13.

[0037] A spiral feeding mechanism is provided at the end of the rotating drum 41 away from the feed drum 2, and the spiral feeding mechanism includes a support frame 51, on which a feeding barrel 52 is fixedly mounted, and the feeding barrel 52 is rotatably connected to the rotating drum 41, and a feed hopper 53 is provided above the feeding barrel 52, and a spiral conveying shaft 54 ​​is rotatably connected inside the feeding barrel 52, and a motor is fixedly mounted at the end of the feeding barrel 52 away from the feed drum 2, and the output shaft of the motor is fixedly connected to the spiral conveying shaft 54.

[0038] like Figure 1 、 Figure 3 As shown, a rotating shaft 15 is vertically connected to the mixing barrel 1, and the upper end of the rotating shaft 15 passes through the feed barrel 2. The upper end of the rotating shaft 15 is rotatably connected to the feed barrel 2. The part of the rotating shaft 15 located in the feed barrel 2 is fixedly installed with a plurality of stirring rods 16, and the lower end of the rotating shaft 15 is rotatably connected to the mounting box 17. A plurality of stirring blades 18 are rotatably connected to the four walls of the mounting box 17. A stirring shaft 19 is fixedly installed on the stirring blade 18, and the stirring shaft 19 is rotatably connected to the mounting box 17. A small bevel gear 2010 is fixedly installed on the end of the stirring shaft 19 away from the stirring blade 18. The lower end of the rotating shaft 15 passes through the mounting box 17 and is fixedly connected to the upper end of the large bevel gear 2110. The large bevel gear 2110 is rotatably connected in the mounting box 17, and the large bevel gear 2110 is meshed with the small bevel gear 2010.

[0039] A second motor 23 is fixedly mounted on the bottom of the mixing barrel 1 , and an output shaft of the second motor 23 passes through the mixing barrel 1 and is fixedly connected to the mounting box 17 .

[0040] Working principle of this utility model:

[0041] The two sides of the feed barrel 2 are rotatably connected with a drum 41, and a plurality of grinding balls 44 are arranged in the drum 41. The raw sand and the waste sand are respectively transported to the drum 41 through the spiral conveying mechanism 5 on both sides of the feed barrel 2. The first motor 11 drives the driving wheel 12 to rotate, and drives the driven wheel 13 to rotate through the synchronous belt 14, so that the driving shaft 9 fixedly connected to the driven wheel 13 rotates, thereby driving the drums 41 at both ends of the feed barrel 2 to rotate at the same time. The material in the drum 41 is impacted and rubbed by the grinding balls 44 and gradually ground into the required particle size. The qualified material enters the feed barrel 2 through the filter screen 42, and the third motor 24 is started to drive the rotating shaft 15 to rotate. The stirring rod 16 at the upper end of the rotating shaft 15 is used to stir the feed barrel 2. The material in the barrel 2 is stirred to prevent the material from being blocked at the discharge port 3. The rotating shaft 15 rotates to drive the large gear 10 to rotate, so that the small gear 10 meshing with the large gear 10 rotates. The small gear 10 drives the stirring shaft 19 to rotate, so that the stirring blade 18 rotates. At the same time, the second motor 23 is started to drive the installation box 17 to rotate, so that the stirring blade 18 on the installation box 17 rotates around the rotating shaft 15. While the stirring blade 18 rotates on itself, it rotates around the rotating shaft 15 to make the materials mixed more evenly. The mixed materials are discharged through the discharge port 25 at the bottom of the mixing barrel 1. By grinding the waste sand and the original sand, the material particles are rounded, the generation of casting defects such as pores is reduced, and the quality of the finished coated sand is improved.

Claims

1. A device for preventing blocking of a coated sand mixer, comprising a mixing barrel (1), characterized in that: A feed barrel (2) is provided above the mixing barrel (1), a discharge port (3) is provided at the bottom of the feed barrel (2), grinding mechanisms (4) are symmetrically provided on both sides of the feed barrel (2), the grinding mechanism (4) comprises a rotating barrel (41) rotatably connected to one side of the feed barrel (2), a filter screen (42) is fixedly installed at one end of the rotating barrel (41) close to the feed barrel (2), a spiral conveying pattern (43) is provided on the inner wall of the rotating barrel (41), a plurality of grinding balls (44) are provided in the rotating barrel (41), and a spiral feeding mechanism is provided at one end of the rotating barrel (41) away from the feed barrel (2).

2. The anti-blocking device for a coated sand mixer according to claim 1, characterized in that: A driving disk is fixedly mounted on the outer wall of the rotating drum (41), and a limiting tooth (7) is fixedly mounted on the driving disk. A parallel mounting plate (8) is fixedly mounted on the feeding drum (2), and a driving shaft (9) is rotatably connected between the two mounting plates (8). Gears (10) are fixedly mounted on both ends of the driving shaft (9), and the gears (10) are meshed with the limiting teeth (7).

3. The anti-blocking device for a coated sand mixer according to claim 2, characterized in that: A first motor (11) is fixedly mounted above the mixing barrel (1), a driving wheel (12) is fixedly mounted on the output shaft of the first motor (11), a driven wheel (13) is fixedly mounted on the driving shaft (9), and a synchronous belt (14) is transmission-connected between the driving wheel (12) and the driven wheel (13).

4. The anti-blocking device for a coated sand mixer according to claim 1, characterized in that: A rotating shaft (15) is rotatably connected in the mixing barrel (1) in the vertical direction, the upper end of the rotating shaft (15) passes through the feeding barrel (2), and the upper end of the rotating shaft (15) is rotatably connected to the feeding barrel (2), a plurality of stirring rods (16) are fixedly installed on the portion of the rotating shaft (15) located in the feeding barrel (2), and a plurality of stirring blades (18) are provided on the portion of the rotating shaft (15) located in the mixing barrel (1).

5. The anti-blocking device for a coated sand mixer according to claim 4, characterized in that: The lower end of the rotating shaft (15) is rotatably connected to a mounting box (17), a plurality of stirring blades (18) are rotatably connected to four walls of the mounting box (17), a stirring shaft (19) is fixedly mounted on the stirring blades (18), the stirring shaft (19) is rotatably connected to the mounting box (17), a small bevel gear (20) (10) is fixedly mounted on one end of the stirring shaft (19) away from the stirring blades (18), the lower end of the rotating shaft (15) passes through the mounting box (17), and the upper end is fixedly connected to a large bevel gear (21) (10), the large bevel gear (21) (10) is rotatably connected in the mounting box (17), and the large bevel gear (21) (10) is meshed with the small bevel gear (20) (10).

6. The anti-blocking device for a coated sand mixer according to claim 5, characterized in that: A bracket (22) is fixedly mounted on the bottom of the mixing barrel (1), and a second motor (23) is fixedly mounted on the bottom of the mixing barrel (1); an output shaft of the second motor (23) passes through the mixing barrel (1) and is fixedly connected to the installation box (17).

7. The anti-blocking device for a coated sand mixer according to claim 5, characterized in that: A third motor (24) is fixedly mounted on the feed barrel (2), and an output shaft of the third motor (24) passes through the feed barrel (2) and is fixedly connected to the rotating shaft (15).

8. The anti-blocking device for a coated sand mixer according to claim 1, characterized in that: The screw feeding mechanism comprises a support frame (51), a feeding barrel (52) is fixedly mounted on the support frame (51), the feeding barrel (52) is rotatably connected to the rotating drum (41), a feeding hopper (53) is arranged above the feeding barrel (52), and a screw conveying shaft (54) is rotatably connected inside the feeding barrel (52).

9. The anti-blocking device for a coated sand mixer according to claim 1, characterized in that: The bottom of the mixing barrel (1) is provided with a discharge port (25).

10. The anti-blocking device for a coated sand mixer according to claim 9, characterized in that: The discharge port (25) is provided with a valve (26).

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