Grinding device for flour processing

Abstract

The present application belongs to the technical field of grain processing equipment, and particularly relates to a grinding device for flour processing, comprising a fixing frame, characterized in that a motor is fixedly connected to the rear side of the upper end of the fixing frame, a shaft coupling is arranged at the output end of the motor, a collecting box is arranged at the lower part of the front side of the fixing frame, a grinding cavity group is fixedly connected to the front side of the upper end of the fixing frame, a discharging group is arranged on the outer surface of the upper side of the grinding cavity group and the upper end of the fixing frame, and a grinding mechanism is arranged on the rear side of the grinding cavity group and the side of the shaft coupling away from the motor. The grinding device for flour processing realizes triple reverse progressive grinding through the grinding mechanism relying on gear transmission, fully separates bran from endosperm, and uniformly controls the fineness of flour. A circulating water cooling and heat dissipation structure is arranged on the outside of the grinding grid sleeve, which can timely take away the grinding heat, avoids high-temperature damage to the quality of flour, and the grinding cavity has a flip cover type structure, which can be completely opened after being unlocked, and is convenient for cleaning the internal residual materials.

Description

Technical Field

[0001] This invention belongs to the technical field of grain processing equipment, and in particular relates to a grinding device for flour processing. Background Technology

[0002] Wheat milling is a core process in the deep processing of grains, and the performance of the milling equipment directly determines the fineness of the flour, processing efficiency, and finished product quality. Currently, traditional flour mills on the market rely on a single set of grinding rollers or a single layer of grinding discs to crush wheat in a single pass, achieving only coarse crushing. The wheat endosperm and bran cannot be fully separated, resulting in significant variations in flour fineness. To achieve the standard of fine flour, multiple grinding passes are required, making the process cumbersome and inefficient. In most milling structures, the grinding components rotate synchronously in the same direction, subjecting the material to only unidirectional compression and friction, resulting in insufficient crushing force. Large wheat grains are not fully broken down, leading to a high gluten content in the finished product and reducing its edible quality. During high-speed wheat milling, the continuous friction between the grinding discs and rollers generates a large amount of heat. Traditional equipment lacks a corresponding heat dissipation structure, causing heat to continuously accumulate inside the grinding chamber. High temperatures cause starch gelatinization and protein denaturation in wheat, leading not only to yellowing and poor taste but also shortening the flour's shelf life and severely impacting the quality of the finished product.

[0003] Existing grinding mills mostly have a one-piece fixed welded structure for the grinding chamber. After grinding, wheat residue and lumpy flour remain on the inner wall of the chamber and grinding components, which are difficult to disassemble and clean. Long-term residual materials are prone to moisture and mold, which can contaminate the flour processed later and pose food safety risks. To address these issues, we propose a grinding device for flour processing. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a grinding apparatus for flour processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a grinding device for flour processing, comprising a fixed frame, characterized in that a motor is fixedly connected to the rear side of the upper end of the fixed frame, a coupling is provided at the output end of the motor, a collection box is provided at the lower front part of the fixed frame, a grinding chamber assembly is fixedly connected to the front side of the upper end of the fixed frame, a feeding assembly is provided on the upper side of the outer surface of the grinding chamber assembly and the upper end of the fixed frame, and a grinding mechanism is provided on the rear side of the grinding chamber assembly and the side of the coupling away from the motor.

[0006] In the above-mentioned flour grinding device, the feeding group includes a hopper, two support rods are fixedly connected to the upper rear side of the outer surface of the hopper, and support rods are fixedly connected to the middle of the two support rods at their close ends. A feed pipe is slidably connected to the lower side of the outer surface of the hopper, and a discharge trough is opened on the lower front end of the hopper. An adjustable baffle is provided in the inner cavity of the discharge trough.

[0007] In the above-mentioned flour grinding device, the lower ends of the two support rods are fixedly connected to the front side of the upper end of the fixed frame, and the ends of the two support rods away from the support rod are fixedly connected to the middle part of the upper end of the fixed frame.

[0008] In the above-mentioned flour grinding device, the grinding chamber assembly includes a housing, a bracket is fixedly connected to the upper left side of the housing, a hinge plate is rotatably connected to the inner cavity of the bracket, a sealing cover is fixedly connected to the rear end of the hinge plate, a feed through hole is opened in the middle of the front end of the sealing cover, a positioning plate is fixedly connected to the right side of the front end of the sealing cover, a rotating handle is fixedly connected to the upper right side of the housing, a fixing plate is fixedly connected to the middle of the inner cavity of the housing, and a grinding mechanism is provided together in the inner cavity of the rear end of the housing and the fixing plate.

[0009] In the above-mentioned flour grinding device, the inner cavity of the positioning plate is matched with the rotating handle, the lower rear part of the outer surface of the hopper is fixedly connected to the upper end of the shell, the output end of the feed pipe is fixed to the middle of the front end of the shell, and the inner cavity of the feed through hole is connected to the inner cavity of the feed pipe.

[0010] In the above-mentioned flour grinding device, the grinding mechanism includes a convex base. A grinding grid sleeve is fixedly connected to the front end of the convex base. A plurality of mounting slots are opened in a common annular array between the front and rear ends of the grinding grid sleeve. U-shaped tubes are fixedly connected to the inner cavities of the plurality of mounting slots. The output ends of the plurality of U-shaped tubes pass through the convex base and are fixedly connected to an annular tube one. The input ends of the plurality of U-shaped tubes pass through the convex base and are fixedly connected to an annular tube two. Annular heat dissipation fins are fixedly connected to the rear side of the outer surface of annular tube one and the rear side of the outer surface of annular tube two. A circulating pump is fixedly connected to the left rear side of the outer surface of annular tube two and the left rear side of the outer surface of annular tube one through a water pipe. A rotating groove three is opened on the front side of the inner cavity of the convex base. A grinding assembly one is rotatably connected to the inner cavity of the rotating groove three and the inner cavity of the convex base.

[0011] In the above-mentioned flour grinding device, the front end of the convex base is fixedly connected to the rear end of the housing by screws, and the grinding grid sleeve is sleeved and connected to the inner cavity of the fixed plate.

[0012] In the above-mentioned flour processing grinding device, the grinding assembly 1 includes a disc body 1, a rotating groove 2 is provided in the middle of the front and rear ends of the disc body 1, an annular grinding sleeve 1 is fixedly connected to the front end of the disc body 1, four grinding plates 1 are fixedly connected to the outer surface of the annular grinding sleeve 1 in an annular array, an internal gear ring is fixedly connected to the rear end of the disc body 1, and gears 3 are meshed and connected to the left and right sides of the inner cavity of the internal gear ring. The grinding assembly 2 is provided together in the inner cavity of the rotating groove 2 and the outer surfaces of the two gears 3.

[0013] In the above-mentioned flour grinding device, the outer surface of the disc body is rotatably connected to the inner cavity of the rotating groove, the outer surface of the four grinding plates is away from the annular grinding sleeve and is in contact with the inner cavity of the grinding grid sleeve, and the rear side of the outer surface of the two gears is rotatably connected to the inner cavity of the convex base.

[0014] In the aforementioned flour grinding device, the grinding assembly two includes a disc body two. A rotating groove one is formed at the center of the front end of the disc body two. A rotating shaft is rotatably connected to the inner cavity of the rotating groove one. A cross plate is fixedly connected to the front end of the rotating shaft. Four coarse grinding rollers are fixedly connected in a circular array to the front end of the cross plate. An annular grinding sleeve two is fixedly connected to the front end of the disc body two. Four grinding plates two are fixedly connected in a circular array to the outer surface of the annular grinding sleeve two. A gear one is fixedly connected to the outer surface of the rotating shaft. Three gear two are meshed on the outer surface of the gear one. The outer surfaces of the three gear two are far apart. A double gear ring is connected to the side of the gear one, and the front end of the double gear ring is fixedly connected to the rear end of the disc body two. The left and right sides of the outer surface of the double gear ring are respectively connected to two gear three. The rear sides of the outer surfaces of the three gear two are rotatably connected to the inner cavity of the convex base. The outer surfaces of the four coarse grinding rollers are respectively attached to the inner cavity of the annular grinding sleeve two. The outer surfaces of the four grinding plates are respectively attached to the inner cavity of the annular grinding sleeve one. The rear side of the outer surface of the rotating shaft is rotatably connected to the rear side of the inner cavity of the convex base, and the rear end of the rotating shaft is fixedly connected to the coupling.

[0015] Compared with existing technologies, the advantages of a flour grinding device are:

[0016] This device features an adjustable flow feeding group and a multi-stage reverse triple grinding mechanism. The feeding group uses adjustable baffles to precisely control the feeding speed, and a triangular support structure ensures the hopper is stable and does not clog. The grinding mechanism uses multiple sets of gears to achieve reverse grinding of the grinding components, completing three processes in sequence: coarse grinding, secondary fine grinding, and tertiary fine grinding. This effectively separates bran and endosperm, resulting in uniform flour fineness. It eliminates the need for repeated grinding processes, effectively improving flour processing efficiency and the quality of finished flour. At the same time, the chamber adopts a flip-top sealing structure. Loosening the rotating handle opens the chamber, fully exposing the internal grinding components. This facilitates cleaning residual wheat flour, inspection and replacement of parts, and eliminates the safety hazard of moldy materials contaminating the flour. The equipment is easy to operate and maintain.

[0017] This device is equipped with a circulating water-cooled heat dissipation component surrounding the grinding grid. During operation, the circulating pump drives the cooling water to circulate continuously in the U-shaped pipe and annular pipe, quickly absorbing the frictional heat generated in the fine grinding process. The heat is then quickly dissipated through the annular heat dissipation fins, stabilizing and controlling the working temperature of the grinding chamber. This prevents high temperatures from causing wheat starch gelatinization and protein denaturation, thus preventing the flour from turning yellow and spoiling, and ensuring the flour's taste and storage performance. The entire machine integrates the motor, grinding chamber, feeding assembly, and bottom collection box on a fixed frame, resulting in a compact structure and small footprint. Finished flour can fall directly into the collection box for centralized storage without the need for additional conveying equipment. The modular assembly design also reduces the cost of replacing parts and transporting the entire machine. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a flour grinding device provided by the present invention;

[0019] Figure 2 This is another perspective schematic diagram of the overall structure of a flour grinding device provided by the present invention;

[0020] Figure 3 This is a schematic diagram of the feeding assembly of a flour grinding device provided by the present invention;

[0021] Figure 4 This is a schematic diagram of the grinding chamber assembly of a flour processing grinding device provided by the present invention;

[0022] Figure 5 This is a schematic diagram from another perspective of the grinding chamber assembly of a flour processing grinding device provided by the present invention;

[0023] Figure 6 This is a schematic diagram of the grinding mechanism of a flour processing grinding device provided by the present invention;

[0024] Figure 7 This invention provides a grinding device for flour processing. Figure 6 Enlarged view of point A in the middle;

[0025] Figure 8 This is a schematic diagram from another perspective of the grinding mechanism of a flour processing grinding device provided by the present invention;

[0026] Figure 9 This is a schematic diagram of the grinding assembly of a flour processing grinding device provided by the present invention;

[0027] Figure 10 This is a schematic diagram of the second grinding unit of a flour processing grinding device provided by the present invention.

[0028] In the diagram: 1. Fixed frame; 2. Collection box; 3. Grinding chamber assembly; 31. Shell; 32. Support; 33. Hinge plate; 34. Feed through hole; 35. Positioning plate; 36. Rotating handle; 37. Fixed plate; 38. Sealing cover; 4. Discharge assembly; 41. Hopper; 42. Adjustable baffle; 43. Discharge chute; 44. Feed pipe; 45. Support rod one; 46. Support rod two; 5. Motor; 6. Coupling; 7. Grinding mechanism; 71. Convex base; 72. Grinding grid sleeve; 73. Annular heat dissipation fin; 74. Grinding assembly one; 741. Disc one; 742. Grinding... Grinding plate 1; 743, Annular grinding sleeve 1; 744, Grinding assembly 2; 7441, Disc 2; 7442, Rotating groove 1; 7443, Double gear ring; 7444, Gear 1; 7445, Gear 2; 7446, Rotating shaft; 7448, Cross plate; 7449, Coarse grinding roller; 74491, Annular grinding sleeve 2; 74492, Grinding plate 2; 745, Internal gear ring; 746, Gear 3; 747, Rotating groove 2; 75, Circulating pump; 76, U-shaped tube; 761, Mounting groove; 77, Annular tube 1; 78, Annular tube 2; 79, Rotating groove 3. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] like Figure 1 - Figure 10 As shown, a flour grinding device includes a fixed frame 1. The fixed frame 1 has a motor 5 fixedly connected to its upper rear side, and a coupling 6 at its output end. The motor 5 serves as the power source for the entire device, and the coupling 6 can stably output power to the internal grinding structure. A collection box 2 is located at the lower front of the fixed frame 1, which receives the finished flour after multiple grinding processes, allowing for centralized material collection. A grinding chamber assembly 3 is fixedly connected to the upper front of the fixed frame 1, providing a sealed processing space for wheat grinding. This assembly can be quickly opened for internal inspection and cleaning. A feeding assembly 4 is provided on the upper surface of the grinding chamber assembly 3 and the upper end of the fixed frame 1, regulating the wheat feed flow rate to prevent excessive feeding and grinding blockage. A grinding mechanism 7 is provided on the rear side of the grinding chamber assembly 3 and the side of the coupling 6 away from the motor 5. The grinding mechanism 7 can achieve three progressive grinding stages: coarse, medium, and fine, and also features a built-in circulating water cooling structure to address the issue of high grinding temperatures affecting flour quality.

[0031] The feeding assembly 4 includes a hopper 41, which is a large-capacity feeding container used to temporarily store cleaned wheat to be processed. Two support rods 45 are fixedly connected to the upper rear side of the outer surface of the hopper 41. Support rods 46 are fixedly connected to the middle of the ends of the two support rods 45 that are close to each other. The support rods 45 and 46 together form a triangular support structure, which stably supports the hopper 41 and prevents it from shaking during feeding. A feeding pipe 44 is slidably connected to the lower outer surface of the hopper 41. The feeding pipe 44 can slide and separate synchronously with the opening and closing of the sealing cover 38, without obstructing the flow of feed. To facilitate the opening and cleaning of the cavity, a discharge trough 43 is provided on the lower front side of the hopper 41. An adjustable baffle 42 is provided inside the discharge trough 43. The operator can slide the adjustable baffle 42 up and down to change the flow opening height of the discharge trough 43, accurately control the falling feed speed of the clean wheat, and adapt to different grinding and processing needs. The lower ends of the two support rods 45 are fixedly connected to the front side of the upper end of the fixed frame 1, and the ends of the two support rods 46 away from the support rods 45 are fixedly connected to the middle of the upper end of the fixed frame 1. The double-layer support structure ensures the overall installation stability of the feeding group.

[0032] The grinding chamber assembly 3 includes a housing 31, which serves as a sealed outer shell for the grinding process, isolating dust and locking the grinding space. A bracket 32 ​​is fixedly connected to the upper left side of the housing 31. A hinge plate 33 is rotatably connected to the inner cavity of the bracket 32. A sealing cover 38 is fixedly connected to the rear end of the hinge plate 33. The hinge plate 33 and the bracket 32 ​​cooperate to form a flip-top structure, allowing the sealing cover 38 to be flipped upwards and opened. A feed hole 34 is opened in the middle of the front end of the sealing cover 38, which serves as a channel for wheat to enter the grinding chamber. A positioning plate 35 is fixedly connected to the right front end of the sealing cover 38. A rotating handle 36 is fixedly connected to the upper right side of the housing 31. The inner cavity of the positioning plate 35 is connected to the rotating handle 36. When the cavity is closed, the rotating handle 36 is inserted into the positioning plate 35 and the sealing cover 38 is locked to ensure that the cavity does not leak powder during the grinding operation. A fixing plate 37 is fixedly connected to the middle of the inner cavity of the housing 31. The fixing plate 37 is used to limit and support the grinding grid sleeve 72 and provide radial positioning for the grinding mechanism 7. The grinding mechanism 7 is provided together at the rear end of the housing 31 and the inner cavity of the fixing plate 37. The lower rear side of the outer surface of the hopper 41 is fixedly connected to the upper end of the housing 31. The output end of the feed pipe 44 is fixed to the middle of the front end of the housing 31, and the inner cavity of the feed through hole 34 is connected to the inner cavity of the feed pipe 44. The cleaned wheat can be smoothly fed into the grinding cavity along the hopper 41, the feed pipe 44, and the feed through hole 34. After the grinding process is completed, the rotating handle 36 can be rotated to disengage it from the positioning plate 35. Pulling the positioning plate 35 outward will cause the sealing cover 38 to flip up and open along the bracket 32 ​​using the hinge plate 33. Simultaneously, the sealing cover 38 will cause the feed pipe 44 to separate from the lower side of the hopper 41, and the front end of the grinding chamber will be completely open. The annular grinding sleeve 74491, the grinding assembly 744, and the grinding grid sleeve 72 will all be exposed, allowing the operator to directly and thoroughly clean the residual wheat flour and grinding components in the chamber.

[0033] The grinding mechanism 7 includes a convex base 71, which serves as the mounting base for the entire grinding rotation assembly and water-cooling heat dissipation assembly. A grinding grid sleeve 72 is fixedly connected to the front end of the convex base 71. The inner wall of the grinding grid sleeve 72 is a third-stage fine grinding working surface, and the grid gaps are used to sieve the ground flour. Several mounting slots 761 are formed in a continuous annular array between the front and rear ends of the grinding grid sleeve 72. U-shaped tubes 76 are fixedly connected to the inner cavities of the mounting slots 761. The U-shaped tubes 76 are arranged close to the outer wall of the grinding grid sleeve 72 to maximize the absorption of heat generated during grinding. The output ends of the U-shaped tubes 76 all pass through the convex base 71 and are fixedly connected to an annular tube 77. The input ends of the U-shaped tubes 76 all pass through the convex base 71 and are fixedly connected to an annular tube 78. The annular tubes 77 and 78 serve as the collection points for cooling water, respectively. The distribution pipeline has annular heat dissipation fins 73 fixedly connected to the rear side of the outer surface of annular pipe 77 and annular pipe 78. The annular heat dissipation fins 73 increase the contact area between the pipeline and the air, quickly removing the grinding heat stored in the circulating water. The left rear side of the outer surface of annular pipe 78 and the left rear side of the outer surface of annular pipe 77 are fixedly connected to a circulating pump 75 through a water pipe. The circulating pump 75 provides power for the circulation of cooling water. A rotating groove 3 79 is opened on the front side of the inner cavity of the convex base 71. The inner cavity of the rotating groove 3 79 and the inner cavity of the convex base 71 are rotatably connected to the grinding assembly 74. The front end of the convex base 71 is fixedly connected to the rear end of the housing 31 by screws. The grinding mechanism 7 can be disassembled as a whole by removing and installing the screws. The grinding grid sleeve 72 is sleeved and connected to the inner cavity of the fixing plate 37. The fixing plate 37 restricts the radial displacement of the grinding grid sleeve 72 to ensure the stability of the grinding gap.

[0034] When the grinding operation enters the third stage of fine grinding, the high-speed friction between the grinding plate 742 and the inner wall of the grinding grid sleeve 72 generates a large amount of heat. The heat is continuously conducted to the grinding grid sleeve 72 body, and the circulation pump 75 is started simultaneously. The circulation pump 75 draws low-temperature cooling water from inside the annular pipe 78 and delivers it to the annular pipe 77. The cooling water flows into the interior of all the U-shaped pipes 76, flows along the U-shaped pipes 76 and continuously absorbs the heat accumulated in the grinding grid sleeve 72. The high-temperature cooling water after absorbing heat flows back into the annular pipe 78. The annular heat dissipation fins 73 simultaneously dissipate heat from the outer walls of the annular pipes 77 and 78, reducing the water temperature. The cooled water is then transported to the pipeline by the circulation pump 75 to circulate and absorb heat, continuously controlling the temperature of the grinding chamber and preventing the flour from deteriorating and its quality from declining due to high temperature.

[0035] Grinding assembly 74 includes a disc body 741, which supports an annular grinding sleeve 743 and an internal gear ring 745 for synchronous rotation. A second rotation groove 747 is provided in the middle of the front and rear ends of the disc body 741, providing rotation space for the grinding assembly 744. The annular grinding sleeve 743 is fixedly connected to the front end of the disc body 741. The inner wall of the annular grinding sleeve 743 forms the second grinding working surface. Four grinding plates 742 are fixedly connected in a ring array on the outer surface of the annular grinding sleeve 743. Grinding plate 742 rotates at high speed with disc 741, completing the third stage of fine grinding in conjunction with grinding grid sleeve 72. An internal gear ring 745 is fixedly connected to the rear end of disc 741. Gears 746 mesh with the left and right sides of the inner cavity of the internal gear ring 745. Gears 746 drive the internal gear ring 745 and disc 741 to rotate in opposite directions. Grinding assembly 744 is provided on the inner cavity of rotating groove 747 and the outer surfaces of the two gears 746. The outer surface of disc 741 interacts with the inner cavity of rotating groove 749. The rotating groove 79 radially limits the disc 741. The outer surfaces of the four grinding plates 742, away from the annular grinding sleeve 743, are in contact with the inner cavity of the grinding grid sleeve 72, resulting in a uniform and stable grinding gap. The rear sides of the outer surfaces of the two gears 746 are rotatably connected to the inner cavity of the convex base 71. The gears 746 only rotate on their own axis, supporting the transmission meshing. When the double gear ring 7443 rotates, it synchronously drives the gears 746 on both sides to rotate. The meshing of the gears 746 drives the inner gear ring 745 to rotate in the opposite direction. The internal gear ring 745 drives the disc body 741, the annular grinding sleeve 743, and the grinding plate 742 to rotate synchronously in opposite directions. After the coarsely ground material enters the inner cavity of the annular grinding sleeve 743, it undergoes secondary grinding between the rotating grinding plate 74492 and the annular grinding sleeve 743. The powder after secondary grinding passes through the annular grinding sleeve 743 and enters the grinding grid sleeve 72. Then, the high-speed rotating grinding plate 742 cooperates with the inner wall of the grinding grid sleeve 72 to achieve a third fine grinding.

[0036] Grinding assembly 2 744 includes a disc body 2 7441, which carries an annular grinding sleeve 2 74491 for synchronous rotation. A rotating groove 1 7442 is formed in the middle of the front end of the disc body 2 7441. A rotating shaft 7446 is rotatably connected to the inner cavity of the rotating groove 1 7442. The rotating shaft 7446 is the main power input shaft of the entire device. A cross plate 7448 is fixedly connected to the front end of the rotating shaft 7446. Four coarse grinding rollers 7449 are fixedly connected in a circular array at the front end of the cross plate 7448. The coarse grinding rollers 7449 rotate at high speed in the same direction as the rotating shaft 7446. The first coarse grinding process is performed. A ring-shaped grinding sleeve 74491 is fixedly connected to the front end of the disc body 7441. The inner wall of the ring-shaped grinding sleeve 74491 serves as the coarse grinding working surface. Four grinding plates 74492 are fixedly connected in a ring array on the outer surface of the ring-shaped grinding sleeve 74491. The grinding plates 74492 rotate in the opposite direction with the disc body 7441, participating in the second stage of grinding. A gear 7444 is fixedly connected to the outer surface of the rotating shaft 7446. The gear 7444 rotates synchronously with the main shaft, outputting power. The outer surface of the gear 7444 is meshed with... Three gears 7445 (second gear) have a double gear ring 7443 meshing with each other on the side of their outer surfaces away from gear 7444 (first gear). Gear 7444 (first gear) drives the double gear ring 7443 to rotate in the opposite direction via gear 7445 (second gear). The front end of the double gear ring 7443 is fixedly connected to the rear end of the disc body 7441 (second gear). The left and right sides of the outer surface of the double gear ring 7443 mesh with two gears 746 (third gear), synchronously transmitting power to the grinding assembly 74 (first grinding assembly). The rear sides of the outer surfaces of the three gears 7445 are rotatably connected to the inner cavity of the convex base 71, only for... The four coarse grinding rollers 7449 have their outer surfaces facing away from each other and are in contact with the inner cavity of the second annular grinding sleeve 74491, forming a stable coarse grinding gap. The outer surfaces of the four grinding plates 74492 have their outer surfaces facing away from the second annular grinding sleeve 74491 and are in contact with the inner cavity of the first annular grinding sleeve 743, which is suitable for secondary grinding. The rear side of the outer surface of the rotating shaft 7446 is rotatably connected to the rear side of the inner cavity of the convex base 71, and the rear end of the rotating shaft 7446 is fixedly connected to the coupling 6. The power output of the motor 5 is directly transmitted to the rotating shaft 7446 through the coupling 6.

[0037] It should be noted that the connection method and control method of the motor 5 and the circulating pump 75 in this invention are conventional designs, which are the standard design methods used by designers and are controlled by an external control center.

[0038] The operating principle of the present invention is now described as follows:

[0039] First, adjust the vertical height of the adjustable baffle 42 in the inner cavity of the discharge trough 43 to adjust the opening of the discharge trough 43 to a suitable size. Then, pour the cleaned wheat into the hopper 41, and then discharge it from the discharge trough 43 into the inner cavity of the feed pipe 44. Next, the cleaned wheat enters the inner cavity of the annular grinding sleeve 74491 from the output end of the inner cavity of the feed pipe 44 and the inner cavity of the feed through hole 34. At the same time, start the motor 5 to drive the coupling 6 to rotate. The rotation of the coupling 6 drives the rotating shaft 7446 connected to the coupling 6 to rotate in the inner cavity of the rotating groove 7442 and the convex base 71. The rotation of the rotating shaft 7446 causes the cross plate 7448 to drive the four coarse grinding rollers 7449 to rotate. These rollers coarsely grind the granules inside the annular grinding sleeve 74491. The rotation of the rotating shaft 7446 also drives the gear 7444 to rotate, which in turn drives the three gears 7445 to rotate simultaneously. The rotation of the gears 7445 then drives the double gear ring 7443 to rotate, which in turn drives the disc body 74491 to rotate. 441 rotates within the inner cavity of the rotating groove 747, thereby driving the annular grinding sleeve 74491 and the four grinding plates 74492 to rotate together. The annular grinding sleeve 74491 and the four coarse grinding rollers 7449 rotate in opposite directions to coarsely grind the wheat. The coarsely ground flour passes through the annular grinding sleeve 74491 into the inner cavity of the annular grinding sleeve 743. The rotation of the double-toothed ring 7443 simultaneously drives the two gears 746 to rotate, which in turn drives the inner gear ring 745 to rotate. 45 drives the disc body 741 to rotate. The rotation of the disc body 741 drives the annular grinding sleeve 743 and the four grinding plates 742 to rotate. At this time, the cleaned wheat that has been coarsely ground in the inner cavity of the annular grinding sleeve 743 is subjected to secondary grinding in the opposite rotation between the annular grinding sleeve 743 and the four grinding plates 74492. The flour from the secondary grinding falls through the annular grinding sleeve 743 into the inner cavity of the grinding grid sleeve 72, and is subjected to a third grinding by the four grinding plates 742 rotating in the inner cavity of the annular grinding sleeve 743, thus achieving fine grinding.Secondly, during the third grinding process, heat is generated when four grinding plates 742 rotating within the grinding grid sleeve 72 are used for grinding. This heat is transferred to the grinding grid sleeve 72. During the grinding process, the circulation pump 75 is activated, pumping cold water from the inner cavity of the second annular pipe 78 into the first annular pipe 77. The water then flows through the first annular pipe 77 into several U-shaped pipes 76 inlets, and then from the inlets to the outlets of the U-shaped pipes 76. During this flow, the water absorbs heat from the grinding grid sleeve 72. After absorbing heat, the cold water enters the second annular pipe 78 from the outlet of the U-shaped pipes 76. The heat is then absorbed by the annular cooling fins 73 and dissipated. The water in the inner cavity of the second annular pipe 78 is then pumped back into the inner cavity of the first annular pipe 77 by the circulation pump 75, and then from the inner cavity of the first annular pipe 77 into several U-shaped pipes 76. The heat from the grinding grid sleeve 72 is drawn away again from the inner cavity of the tube 76. This process is repeated to reduce the heat generated during the third flour grinding, preventing excessive heat from affecting the flour grinding quality. After the three grindings, the flour falls from the lower side of the inner cavity of the shell 31 into the collection box 2, where it is collected. Furthermore, after grinding, the rotating handle 36 can be rotated to disengage from the inner cavity of the positioning plate 35. Pulling the positioning plate 35 causes the sealing cover 38 to rotate, driving the hinge plate 33 within the inner cavity of the bracket 32. This separates the sealing cover 38 from the front side of the inner cavity of the shell 31. The rotation of the sealing cover 38 also causes the feed pipe 44 to disengage from the lower side of the hopper 41. The sealing cover 38 no longer seals the front side of the inner cavity of the shell 31, exposing the annular grinding sleeve 74491, the grinding group 744, and the grinding grid sleeve 72 to the field of vision, facilitating cleaning of the inside of the device.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flour grinding device, comprising a fixed frame (1), characterized in that, A motor (5) is fixedly connected to the rear side of the upper end of the fixed frame (1). A coupling (6) is provided at the output end of the motor (5). A collection box (2) is provided at the lower front side of the fixed frame (1). A grinding chamber assembly (3) is fixedly connected to the front side of the upper end of the fixed frame (1). A feeding assembly (4) is provided on the upper side of the outer surface of the grinding chamber assembly (3) and the upper end of the fixed frame (1). A grinding mechanism (7) is provided on the rear side of the grinding chamber assembly (3) and the side of the coupling (6) away from the motor (5).

2. The flour grinding device according to claim 1, characterized in that, The feeding group (4) includes a hopper (41). Two support rods (45) are fixedly connected to the upper rear side of the outer surface of the hopper (41). Support rods (46) are fixedly connected to the middle of the two support rods (45) at their close ends. A feed pipe (44) is slidably connected to the lower side of the outer surface of the hopper (41). A discharge trough (43) is opened on the lower front side of the hopper (41). An adjustable baffle (42) is provided in the inner cavity of the discharge trough (43).

3. The flour grinding device according to claim 2, characterized in that, The lower ends of the two support rods (45) are fixedly connected to the front side of the upper end of the fixed frame (1), and the ends of the two support rods (46) away from the support rods (45) are fixedly connected to the middle of the upper end of the fixed frame (1).

4. A flour grinding device according to claim 2, characterized in that, The grinding chamber assembly (3) includes a housing (31), a bracket (32) is fixedly connected to the upper left side of the housing (31), a hinge plate (33) is rotatably connected to the inner cavity of the bracket (32), a sealing cover (38) is fixedly connected to the rear end of the hinge plate (33), a feed through hole (34) is opened in the middle of the front end of the sealing cover (38), a positioning plate (35) is fixedly connected to the right side of the front end of the sealing cover (38), a rotating handle (36) is fixedly connected to the upper right side of the housing (31), a fixing plate (37) is fixedly connected to the middle of the inner cavity of the housing (31), and a grinding mechanism (7) is provided together in the rear end of the housing (31) and the inner cavity of the fixing plate (37).

5. A flour grinding device according to claim 4, characterized in that, The inner cavity of the positioning plate (35) is similarly matched with the rotating handle (36). The lower rear part of the outer surface of the hopper (41) is fixedly connected to the upper end of the shell (31). The output end of the feed pipe (44) is fixed to the middle of the front end of the shell (31), and the inner cavity of the feed through hole (34) is connected to the inner cavity of the feed pipe (44).

6. A flour grinding device according to claim 4, characterized in that, The grinding mechanism (7) includes a convex base (71), a grinding grid sleeve (72) is fixedly connected to the front end of the convex base (71), and a plurality of mounting grooves (761) are opened in a common annular array between the front end and the rear end of the grinding grid sleeve (72). A U-shaped tube (76) is fixedly connected to the inner cavity of each of the mounting grooves (761). The output ends of the U-shaped tubes (76) all pass through the convex base (71) and are fixedly connected to an annular tube (77). The input ends of the U-shaped tubes (76) all pass through the convex base (71). The annular tube 2 (78) is fixedly connected to the annular tube 1 (77) and the annular tube 2 (78) are fixedly connected to the rear side of the outer surface. The left rear side of the annular tube 2 (78) and the left rear side of the annular tube 1 (77) are fixedly connected to the circulating pump (75) through the water pipe. The front side of the inner cavity of the convex base (71) is provided with a rotating groove 3 (79). The inner cavity of the rotating groove 3 (79) and the inner cavity of the convex base (71) are rotatably connected to the grinding assembly 1 (74).

7. A flour grinding apparatus according to claim 6, characterized in that, The front end of the convex base (71) is fixedly connected to the rear end of the shell (31) by screws, and the grinding grid sleeve (72) is sleeved and connected to the inner cavity of the fixing plate (37).

8. A grinding device for flour processing according to claim 6, characterized in that, The first grinding assembly (74) includes a disc body (741), a rotating groove (747) is provided in the middle of the front and rear ends of the disc body (741), an annular grinding sleeve (743) is fixedly connected to the front end of the disc body (741), four grinding plates (742) are fixedly connected in an annular array on the outer surface of the annular grinding sleeve (743), an internal gear ring (745) is fixedly connected to the rear end of the disc body (741), gears (746) are meshed on both the left and right sides of the inner cavity of the internal gear ring (745), and the second grinding assembly (744) is provided together in the inner cavity of the rotating groove (747) and the outer surfaces of the two gears (746).

9. A grinding device for flour processing according to claim 8, characterized in that, The outer surface of the disc body (741) is rotatably connected to the inner cavity of the rotating groove (79), the outer surfaces of the four grinding plates (742) away from the annular grinding sleeve (743) are in contact with the inner cavity of the grinding grid sleeve (72), and the rear sides of the outer surfaces of the two gears (746) are rotatably connected to the inner cavity of the convex base (71).

10. A flour grinding apparatus according to claim 9, characterized in that, The second grinding assembly (744) includes a second disc (7441). A rotating groove (7442) is provided in the middle of the front end of the second disc (7441). A rotating shaft (7446) is rotatably connected to the inner cavity of the rotating groove (7442). A cross plate (7448) is fixedly connected to the front end of the rotating shaft (7446). Four coarse grinding rollers (7449) are fixedly connected in a ring array at the front end of the cross plate (7448). An annular grinding sleeve (74491) is fixedly connected to the front end of the second disc (7441). Four grinding plates (74492) are fixedly connected in a ring array on the outer surface of the annular grinding sleeve (74491). A gear (7444) is fixedly connected to the outer surface of the rotating shaft (7446). Three gears (7445) are meshed on the outer surface of the gear (7444). The outer surfaces of the three gears (7445) are... A double gear ring (7443) is connected to the side away from gear one (7444). The front end of the double gear ring (7443) is fixedly connected to the rear end of the disc body two (7441). The left and right sides of the outer surface of the double gear ring (7443) are respectively connected to two gear three (746). The rear side of the outer surface of the three gear two (7445) is rotatably connected to the inner cavity of the convex base (71). The outer surfaces of the four coarse grinding rollers (7449) are respectively connected to the inner cavity of the annular grinding sleeve two (74491). The outer surfaces of the four grinding plates two (74492) are respectively connected to the inner cavity of the annular grinding sleeve one (743). The rear side of the outer surface of the rotating shaft (7446) is rotatably connected to the rear side of the inner cavity of the convex base (71). The rear end of the rotating shaft (7446) is fixedly connected to the coupling (6).

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