Grinding mill

Abstract

The utility model discloses a rice mill belongs to grain processing equipment technical field, in order to reduce the loss of rice aroma in the processing process in the prior art, the rice mill includes millstone (1), cooling device (2) and drive mechanism (3), and millstone (1) contains the upper layer millstone (11) and lower layer millstone (12) of upper and lower layer interlayer interval arrangement, and the material of millstone (1) is stone, and cooling device (2) can reduce the temperature of millstone (1), and drive mechanism (3) can drive upper layer millstone (11) rotation. The material of millstone is natural stone material, and low -speed motor drives millstone rotation, reduces the high temperature of millstone operation, and simultaneously, the cold -blast system is installed on the millstone upside and downside, makes the temperature of millstone operation work close to normal temperature or room temperature, and the natural taste of rice is guaranteed to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of grain processing equipment technology, specifically a rice milling machine. Background Technology

[0002] The current working principle of rice milling machines is that, driven by an electric motor and various transmission systems, the milling machine rapidly rotates, acting on the rice grains. Through several cycles and the blowing of air to remove broken husks, the rice is then polished, finally yielding the finished rice. Freshly milled rice, after the husks have been removed, is very hot to the touch, reaching temperatures above 40-50 degrees Celsius. This high-temperature processing significantly diminishes the rice's original aroma. Although there is a cooling process at the rice outlet, this is insufficient to compensate for the lost aroma during processing. Utility Model Content

[0003] To reduce the loss of rice aroma caused by high temperature during rice processing in the prior art, this utility model provides a rice milling machine in which the milling disc is made of natural stone, and a low-speed motor drives the milling disc to rotate, reducing the high temperature generated when the milling disc is running; at the same time, a cooling system is installed above and below the milling disc, so that the temperature of the milling disc during operation is close to room temperature, thus maximizing the preservation of the natural taste and aroma of the rice.

[0004] The technical solution adopted by this utility model embodiment to solve its technical problem is: A rice milling machine includes a grinding disc, a cooling device, and a driving mechanism. The grinding disc comprises an upper grinding disc and a lower grinding disc stacked and spaced apart. Both the upper and lower grinding discs are made of natural stone. The cooling device can reduce the temperature of the grinding disc, and the driving mechanism can drive the upper grinding disc to rotate. The cooling device includes an upper air duct and a blower. The blower can supply cooling airflow into the upper air duct, which is located above the upper grinding disc and can spray cooling airflow onto the upper surface of the upper grinding disc. The upper surface of the upper grinding disc is provided with grooves and protrusions. The cooling device also includes a cooling water circulation pipe, a cold water pump, and a cold water tank. The lower grinding disc contains an internal cooling water channel. The internal cooling water channel, the cooling water circulation pipe, the cold water pump, and the cold water tank are connected in sequence, and the cold water pump can supply cooling water into the lower grinding disc.

[0005] Both the upper and lower grinding discs are upright cylindrical structures, with their axes coinciding. Both are made of natural stone, and the vertical spacing between them is adjustable.

[0006] The drive mechanism includes a motor, a transmission unit, and a rotating shaft connected in sequence. The rotating shaft is in an upright state and passes through the upper and lower grinding discs. The rotating shaft is fixedly connected to the upper grinding disc. The motor can drive the upper grinding disc to rotate in sequence through the transmission unit and the rotating shaft.

[0007] The upper grinding disc is provided with a stepped through hole. The inner circumferential surface of the stepped through hole contains an upper small diameter section, an annular transition section and a lower large diameter section connected from top to bottom. The outer circumferential surface of the rotating shaft contains a protruding mating section. The horizontal cross-section of the lower large diameter section and the protruding mating section are both square. The protruding mating section and the lower large diameter section are matched and inserted.

[0008] The rice milling machine also includes an adjustment base, on which the drive mechanism is located. The adjustment base can adjust the position of the upper grinding disc in the vertical direction.

[0009] The adjusting base includes a top plate, a bottom plate, a threaded sleeve, a screw, a first bevel gear, a second bevel gear, a drive shaft, a crank handle, a support plate, and a guide rail. The top plate and the bottom plate are spaced apart vertically. The threaded sleeve, screw, first bevel gear, second bevel gear, and drive shaft are connected in sequence. The lower end of the guide rail is fixedly connected to the bottom plate. The guide rail passes through the top plate. Rotating the crank handle can move the top plate up and down.

[0010] The threaded sleeve, screw, first bevel gear, second bevel gear, drive shaft, crank handle, and support plate are all located between the top plate and the bottom plate. The axes of the threaded sleeve, screw, and first bevel gear are all vertical. The top plate and threaded sleeve are connected and fixed vertically. The threaded sleeve and screw are threaded together. The first bevel gear is fixed to the lower end of the screw. The axes of the second bevel gear and drive shaft are both horizontal. The first and second bevel gears are meshed. The second bevel gear is fixed to one end of the drive shaft. The crank handle is fixed to the other end of the drive shaft. The drive shaft passes through the support plate, which is fixed to the bottom plate.

[0011] The rice milling machine also includes a hopper, which is located above the upper grinding disc. The hopper is connected to a feeding pipe and is fixedly connected to the rotating shaft. The upper grinding disc is provided with a feeding port, and the outlet end of the feeding pipe is directly opposite the feeding port.

[0012] The beneficial effects of this utility model embodiment are: the grinding disc in the rice mill is made of natural stone, and the low-speed motor drives the grinding disc to rotate, which reduces the high temperature generated when the grinding disc is running; at the same time, a cooling system is installed above and below the grinding disc, so that the temperature of the grinding disc during operation is close to room temperature or room temperature, thus maximizing the preservation of the natural taste and aroma of the rice. Attached Figure Description

[0013] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0014] Figure 1 This is a schematic diagram of the rice milling machine described in this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram showing the connection between the upper grinding disc and the rotating shaft.

[0016] Figure 3 It is along Figure 2 Cross-sectional view along the AA direction.

[0017] Figure 4 This is a diagram illustrating the adjustment base.

[0018] Figure 5 This is a schematic diagram when the connecting part is a steel wire rope and the counterweight unit is not working.

[0019] Figure 6 This is a schematic diagram of a steel wire rope connection and a counterweight unit in operation.

[0020] The annotations in the attached figures are explained as follows: 1. Grinding disc; 2. Cooling device; 3. Drive mechanism; 4. Adjusting base; 5. Hopper; 6. Counterweight unit; 11. Upper grinding disc; 12. Lower grinding disc; 13. Support legs; 21. Upper duct; 22. Lower duct; 23. Blower; 24. Hanger rod; 31. Motor; 32. Transmission unit; 33. Shaft; 41. Top plate; 42. Bottom plate; 43. Threaded sleeve; 44. Screw; 45. First bevel gear; 46. Second bevel gear; 47. Drive shaft; 48. Handle; 49. Support plate; 410. Guide rail; 51. Feed pipe; 61. Connecting part; 62. Receiving part; 63. Counterweight; 111. Stepped through hole; 112. Upper small diameter section; 113. Annular transition section; 114. Lower large diameter section; 115. Feed inlet; 331. Emphasize the coordination section. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] For ease of understanding and description, the following description of this utility model uses absolute positional relationships. Unless otherwise specified, the directional word "above" indicates... Figure 1 The direction above, the directional word "down" indicates Figure 1 The lower side of the middle, the directional word "left" indicates Figure 1 The left side of the direction, the directional word "right" indicates Figure 1 The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 1 The direction of the paper and the direction pointing inwards; the directional word "back" indicates perpendicular to. Figure 1 The direction of the orientation is towards the outside of the paper. This invention is described from the perspective of a reader or user, but the aforementioned directional terms should not be construed as limiting the scope of protection of this invention. Regarding the material, weight, size, angle, and parameters of the components, those skilled in the art can determine or replace them based on actual needs or a limited number of experiments.

[0023] like Figure 1 As shown, the rice milling machine described in this embodiment includes a grinding disc 1, a cooling device 2, and a driving mechanism 3. The grinding disc 1 has an upper grinding disc 11 and a lower grinding disc 12 stacked and spaced apart. The grinding disc 1 is made of stone. The cooling device 2 can reduce the temperature of the grinding disc 1, and the driving mechanism 3 can drive the upper grinding disc 11 to rotate.

[0024] As one possible implementation, both the upper grinding disc 11 and the lower grinding disc 12 are upright, flat cylindrical structures. The axis of the upper grinding disc 11 and the axis of the lower grinding disc 12 coincide. Both the upper grinding disc 11 and the lower grinding disc 12 are made of natural stone (such as granite, sandstone, or limestone, etc., which are cut and polished). The vertical distance between the upper grinding disc 11 and the lower grinding disc 12 can be adjusted to meet the needs of grinding various rice grain diameters.

[0025] As one possible implementation method, such as Figure 1 As shown, the drive mechanism 3 includes a motor 31, a transmission unit 32, and a rotating shaft 33 connected in sequence. The rotating shaft 33 is in an upright position, and its axis coincides with the axis of the upper grinding disc 11. The rotating shaft 33 passes through the upper grinding disc 11 and the lower grinding disc 12, and is fixedly connected to the upper grinding disc 11. The motor 31 can drive the upper grinding disc 11 to rotate around the rotating shaft 33 in sequence through the transmission unit 32 and the rotating shaft 33. The drive mechanism 3 makes the grinding disc operate at a low speed, thereby reducing the temperature of the rice grains during grinding.

[0026] The transmission unit 32 can be a belt drive unit, which includes a first type B pulley, a second type B pulley, and a belt. The first type B pulley is fixedly sleeved on the outside of the rotating shaft 33, and the second type B pulley is fixedly sleeved on the outside of the output shaft of the motor 31. The second type B pulley and the output shaft of the motor 31 can be connected by a reducer, and the rotating shaft 33 and the lower grinding disc 12 can be connected by bearings.

[0027] As one possible implementation method, such as Figure 2 and Figure 3As shown, the upper grinding disc 11 has a stepped through hole 111. The inner circumferential surface of the stepped through hole 111 contains an upper small-diameter section 112, an annular transition section 113, and a lower large-diameter section 114 connected sequentially from top to bottom. The outer circumferential surface of the rotating shaft 33 contains a protruding fitting section 331. The horizontal cross-sections of both the lower large-diameter section 114 and the protruding fitting section 331 are square, and the protruding fitting section 331 and the lower large-diameter section 114 are fitted together. The rotating shaft 33 can not only drive the upper grinding disc 11 to rotate, but also drive the upper grinding disc 11 to move up and down, thereby adjusting the vertical distance between the upper grinding disc 11 and the lower grinding disc 12.

[0028] As one possible implementation method, such as Figure 1 and Figure 4 As shown, the rice milling machine also includes an adjusting base 4, and a driving mechanism 3 is located on the adjusting base 4. The adjusting base 4 enables the upper grinding disc 11 and the driving mechanism 3 to move up and down synchronously, thereby enabling the adjusting base 4 to adjust the position of the upper grinding disc 11 in the vertical direction.

[0029] As one possible implementation method, such as Figure 4 As shown, the adjusting base 4 includes a top plate 41, a bottom plate 42, a threaded sleeve 43, a screw 44, a first bevel gear 45, a second bevel gear 46, a drive shaft 47, a crank handle 48, a support plate 49, and a guide rail 410. The top plate 41 and the bottom plate 42 are spaced apart vertically. The motor 31 and the rotating shaft 33 are both fixed to the top plate 41, and the rotating shaft 33 and the top plate 41 are connected by bearings. The threaded sleeve 43, the screw 44, the first bevel gear 45, the second bevel gear 46, and the drive shaft 47 are connected in sequence. The guide rail 410 is an upright columnar structure. The lower end of the guide rail 410 is connected and fixed to the bottom plate 42. The guide rail 410 passes through the top plate 41, and the top plate 41 can only move up and down without rotating. Rotating the crank handle 48 can make the top plate 41 move up and down.

[0030] The threaded sleeve 43, screw 44, first bevel gear 45, second bevel gear 46, drive shaft 47, crank handle 48, and support plate 49 are all located between the top plate 41 and the bottom plate 42. The axes of the threaded sleeve 43, the screw 44, and the first bevel gear 45 are all vertical. The top plate 41 and the threaded sleeve 43 are connected and fixed vertically. The threaded sleeve 43 and the screw 44 are threadedly connected (through a self-locking thread). The first bevel gear 45 is fixed to the lower end of the screw 44. The axes of the second bevel gear 46 and the drive shaft 47 are both horizontal. The first bevel gear 45 and the second bevel gear 46 are meshed. The second bevel gear 46 is fixed to one end of the drive shaft 47. The crank handle 48 is fixed to the other end of the drive shaft 47. The drive shaft 47 passes through the support plate 49. The drive shaft 47 and the support plate 49 can be connected by bearings. The support plate 49 is fixed to the bottom plate 42.

[0031] As one possible implementation method, such as Figure 1 As shown, the rice milling machine also includes a hopper 5, which is located above the upper grinding disc 11. The hopper 5 is connected to a feeding pipe 51 and is fixedly connected to the rotating shaft 33. The hopper 5 can rotate synchronously with the rotating shaft 33. The upper grinding disc 11 is provided with a feeding port 115, which communicates with the space between the upper grinding disc 11 and the lower grinding disc 12. The outlet end of the feeding pipe 51 is directly opposite the feeding port 115. The raw rice in the hopper 5 can enter the feeding port 115 through the feeding pipe 51.

[0032] As one possible implementation method, such as Figure 1 , Figure 5 , Figure 6 As shown, to ensure that the upper grinding disc 11 operates more smoothly and stably at low speeds, the upper grinding disc 11 is connected to multiple counterweight units 6. The multiple counterweight units 6 are evenly spaced along the circumference of the upper grinding disc 11. Each counterweight unit 6 includes a connecting part 61 and a receiving part 62. The receiving part 62 is connected and fixed to the side circumferential surface of the upper grinding disc 11 through the connecting part 61. At least one counterweight block 63 is provided in the receiving part 62.

[0033] The counterweight 63 can be spherical, the connecting part 61 can be a steel wire rope or a steel rod, and the receiving part 62 can be a metal box. The counterweight 63 also rotates when the upper grinding disc 11 is running normally, and has a certain rotational inertial potential energy, which can effectively overcome the speed fluctuation caused by the difference in the amount of material fed and the size of the rice grains, and ensure the stable operation of the upper grinding disc 11.

[0034] As one possible implementation method, such as Figure 1 As shown, the cooling device 2 can be an air-cooled device. The cooling device 2 includes an upper air duct 21, a lower air duct 22, and a blower 23. The blower 23 supplies cooling airflow to the upper air duct 21 and the lower air duct 22. The upper air duct 21 is located above the upper grinding disc 11 and can be connected and fixed to the ceiling of the room via a hanger 24. The lower air duct 22 is located below the lower grinding disc 12. The upper air duct 21 sprays cooling airflow onto the upper surface of the upper grinding disc 11, and the lower air duct 22 also sprays cooling airflow onto the upper surface of the upper grinding disc 11. To improve cooling efficiency, grooves and ridges can be provided on both the upper surface of the upper grinding disc 11 and the lower grinding disc 12, similar to the surface of a radiator.

[0035] Cooling device 2 ensures that the rice is kept at or near room temperature during the milling process, thus guaranteeing the original taste, aroma, and quality of the produced rice. This has enormous market and practical value in today's pursuit of a high-quality, natural lifestyle.

[0036] Alternatively, cooling device 2 can be a water-cooled device, comprising a cooling water circulation pipe, a cold water pump, and a cold water tank. In this case, the lower grinding disc 12 contains an internal cooling water channel, and the internal cooling water channel, cooling water circulation pipe, cold water pump, and cold water tank are connected in sequence. The cold water pump can supply cooling water to the lower grinding disc 12, thereby cooling the lower grinding disc 12. Cooling device 2 can employ air-cooled or water-cooled devices individually or simultaneously.

[0037] The working process of the rice milling machine is described below.

[0038] Raw rice to be ground is added to hopper 5. The raw rice passes through feed pipe 51 and feed inlet 115 sequentially between upper grinding disc 11 and lower grinding disc 12. Motor 31 drives upper grinding disc 11 to rotate around shaft 33. The rotation speed of upper grinding disc 11 can be obtained through a limited number of experiments. The rotation speed of upper grinding disc 11 should ensure that the temperature of the raw rice ground by upper grinding disc 11 and lower grinding disc 12 is less than 30°C. In addition, upper air pipe 21 sprays cooling airflow onto the upper surface of upper grinding disc 11, and lower air pipe 22 sprays cooling airflow onto the upper surface of upper grinding disc 11 to ensure that the temperature of the raw rice ground by upper grinding disc 11 and lower grinding disc 12 is less than 30°C. The vertical position of upper grinding disc 11 can be adjusted by adjusting base 4, thereby adjusting the vertical distance between upper grinding disc 11 and lower grinding disc 12.

[0039] The described rice mill uses a natural stone grinding disc, driven by an electric motor to rotate at a low speed, reducing the high temperature generated during operation. Simultaneously, a cooling system is installed above and below the grinding disc, keeping its operating temperature close to room temperature and preserving the natural flavor and aroma of the rice. Counterweights on both sides of the grinding disc ensure stable operation at low speeds. This rice mill achieves the same effect as traditional rice milling, improving efficiency without compromising the rice's natural flavor and aroma, thus possessing broad market and economic value.

[0040] The above description is merely a specific embodiment of this utility model and should not be construed as limiting the scope of its implementation. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this utility model should still fall within its coverage. Furthermore, the technical features, technical solutions, and embodiments of this utility model can be freely combined and used.

Claims

1. A rice milling machine, characterized in that, The rice milling machine includes a grinding disc (1), a cooling device (2) and a driving mechanism (3). The grinding disc (1) has an upper grinding disc (11) and a lower grinding disc (12) stacked and spaced apart. The upper grinding disc (11) and the lower grinding disc (12) are both made of natural stone. The cooling device (2) can reduce the temperature of the grinding disc (1), and the driving mechanism (3) can drive the upper grinding disc (11) to rotate. The cooling device (2) includes an upper air duct (21) and a blower (23). The blower (23) can supply cooling airflow into the upper air duct (21). The upper air duct (21) is located above the upper grinding disc (11). The upper air duct (21) can spray cooling airflow onto the upper surface of the upper grinding disc (11). The upper surface of the upper grinding disc (11) is provided with grooves and protrusions. The cooling device (2) also includes a cooling water circulation pipe, a cold water pump and a cold water tank. The lower grinding disc (12) contains a cooling water internal flow channel. The cooling water internal flow channel, the cooling water circulation pipe, the cold water pump and the cold water tank are connected in sequence. The cold water pump can supply cooling water to the lower grinding disc (12).

2. The rice milling machine according to claim 1, characterized in that, Both the upper grinding disc (11) and the lower grinding disc (12) are upright cylindrical structures. The axis of the upper grinding disc (11) and the axis of the lower grinding disc (12) coincide. The vertical spacing between the upper grinding disc (11) and the lower grinding disc (12) can be adjusted.

3. The rice milling machine according to claim 1, characterized in that, The drive mechanism (3) includes a motor (31), a transmission unit (32) and a rotating shaft (33) connected in sequence. The rotating shaft (33) is in an upright state and passes through the upper grinding disc (11) and the lower grinding disc (12). The rotating shaft (33) is connected and fixed to the upper grinding disc (11). The motor (31) can drive the upper grinding disc (11) to rotate in sequence through the transmission unit (32) and the rotating shaft (33).

4. The rice milling machine according to claim 3, characterized in that, The upper grinding disc (11) is provided with a stepped through hole (111). The inner circumferential surface of the stepped through hole (111) contains an upper small diameter section (112), an annular transition section (113) and a lower large diameter section (114) connected from top to bottom. The outer circumferential surface of the rotating shaft (33) contains a protruding mating section (331). The horizontal cross-sections of the lower large diameter section (114) and the protruding mating section (331) are both square. The protruding mating section (331) and the lower large diameter section (114) are matched and inserted.

5. The rice milling machine according to claim 3, characterized in that, The rice milling machine also includes an adjustment base (4), and a drive mechanism (3) is located on the adjustment base (4). The adjustment base (4) can adjust the position of the upper grinding disc (11) in the vertical direction.

6. The rice milling machine according to claim 5, characterized in that, The adjusting base (4) includes a top plate (41), a bottom plate (42), a threaded sleeve (43), a screw (44), a first bevel gear (45), a second bevel gear (46), a drive shaft (47), a crank handle (48), a support plate (49), and a guide rail (410). The top plate (41) and the bottom plate (42) are arranged at intervals. The threaded sleeve (43), the screw (44), the first bevel gear (45), the second bevel gear (46), and the drive shaft (47) are connected in sequence. The lower end of the guide rail (410) is connected and fixed to the bottom plate (42). The guide rail (410) passes through the top plate (41). Rotating the crank handle (48) can move the top plate (41) up and down.

7. The rice milling machine according to claim 6, characterized in that, The threaded sleeve (43), screw (44), first bevel gear (45), second bevel gear (46), drive shaft (47), crank handle (48), and support plate (49) are all located between the top plate (41) and the bottom plate (42). The axes of the threaded sleeve (43), the screw (44), and the first bevel gear (45) are all vertical. The top plate (41) and the threaded sleeve (43) are connected and fixed vertically. The threaded sleeve (43) and the screw (44) are threaded together. The first bevel gear (45) is fixed to the lower end of the screw (44), the axis of the second bevel gear (46) and the axis of the transmission shaft (47) are both horizontal, the first bevel gear (45) and the second bevel gear (46) are meshed and connected, the second bevel gear (46) is fixed to one end of the transmission shaft (47), the crank (48) is fixed to the other end of the transmission shaft (47), the transmission shaft (47) passes through the support plate (49), and the support plate (49) is fixed on the base plate (42).

8. The rice milling machine according to claim 3, characterized in that, The rice milling machine also includes a hopper (5), which is located above the upper grinding disc (11). The hopper (5) is connected to a feeding pipe (51), and the hopper (5) is fixedly connected to the rotating shaft (33). The upper grinding disc (11) is provided with a feeding port (115), and the outlet end of the feeding pipe (51) is directly opposite the feeding port (115).

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