Grain powder processing flour mill capable of filtering and removing impurities
The rotating rod drives the conical gear and the clapper to hit the screen, and combines the positioning and dust removal mechanism to solve the problem of screen cleaning caused by grain accumulation, improves the practicality and stability of the flour mill, extends the service life and reduces dust pollution.
Patent Information
- Application Number
- CN202422122087.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-30
AI Technical Summary
During the use of existing filtration and impurities, the existing grain powder processing and grinders that can be filtered and removed, due to the motor driving the cleaning mechanism to rotate rapidly, there is too much grain accumulation on the screen, which makes the subsequent cleaning mechanism unable to effectively clean up the grain or debris accumulated inside the screen.
The rotating rod is used to drive the conical gears and clapper plates to beat the screen, and the spring telescopic rod is combined to increase the shaking range of the screen to prevent debris from accumulating; the feed hopper is fixed through the positioning mechanism to ensure its stability at the feed port; dust is used to clean up dust, and the protective mechanism prevents dust accumulation.
It improves the practicality and stability of the screening mechanism, prevents the discharge speed from falling, extends the service life of the screening mechanism, and reduces dust pollution.
Smart Images
Figure CN223069650U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flour mills, and specifically relates to a grain flour processing flour mill capable of filtering and removing impurities. Background Art
[0002] A flour mill is a flour grinding machine composed of a power, a feeding, a grinding, and a separating system. The mating surfaces at the lower ends of the inner and outer grinding heads are cylindrical. Above the grinding heads, two radial ball bearings serve as the two main support points, and the cylinders at the lower ends of the inner and outer grinding heads serve as the rotational auxiliary support points. The gap between the inner and outer grinding heads is adjusted by the axial movement of the inner grinding head. The ground grain directly falls from the gap between the grinding heads onto the screen bottom through the screen frame, and the flour and bran are separated by the brush with adjustable gap and the screen bottom.
[0003] For example, the utility model with the publication number CN218359854U discloses a grain flour processing flour mill capable of filtering and removing impurities, including a flour mill main body. An outlet hopper is arranged on one side of the flour mill main body, a feed hopper is arranged at the top of the flour mill main body, a screening structure is arranged at the lower end inside the feed hopper, and an anti-blocking structure is arranged in the middle of the screening structure; the grain flour processing flour mill capable of filtering and removing impurities of the present utility model can break up some damp and solidified grains, avoid some damp and solidified grains blocking on the filter plate, and can also filter large foreign objects through the filter holes, so as to obtain relatively clean grains for flour processing. The quality of the processed flour is relatively good. The filter holes of the filter plate can be dredged by the fixing nails on the rotating wheel to avoid some grains or foreign objects blocking in the filter holes and ensure that the grains smoothly enter the interior of the flour mill main body from the feed hopper.
[0004] In the process of implementing the present application, it is found that this technology has the following problems: during the use of the existing grain flour processing flour mill capable of filtering and removing impurities, due to the motor driving the cleaning mechanism to rotate rapidly and too much grain accumulating at the upper end of the screen, the subsequent cleaning mechanism cannot effectively clean the grain or debris accumulated inside the screen during the rotation process.
[0005] Therefore, a grain flour processing flour mill capable of filtering and removing impurities is proposed. Summary of the Utility Model
[0006] The purpose of the present utility model is to solve the problem that during the use of the existing grain flour processing flour mill capable of filtering and removing impurities, due to the motor driving the cleaning mechanism to rotate rapidly and too much grain accumulating at the upper end of the screen, the subsequent cleaning mechanism cannot effectively clean the grain or debris accumulated inside the screen during the rotation process. The present utility model provides a grain flour processing flour mill capable of filtering and removing impurities.
[0007] The present utility model specifically adopts the following technical solutions to achieve the above purpose:
[0008] A grain flour processing mill capable of filtering and removing impurities, comprising a bracket and a mill body. The mill body is installed on the upper surface of the bracket. An inlet is provided on the upper surface of the mill body. Inside the inlet of the mill body, a screening mechanism for filtering the grains entering the interior of the mill body is provided. A protective mechanism is arranged on the upper surface of the screening mechanism. A clamping groove is provided on the front surface of the screening mechanism. An air dust removal mechanism is installed inside the clamping groove of the screening mechanism. A bottom plate is arranged inside the bracket. The lower surface of the air dust removal mechanism is placed on the upper surface of the bottom plate. Positioning mechanisms are arranged on the left and right sides of the screening mechanism.
[0009] Further, the screening mechanism includes a feed hopper. The feed hopper is clamped inside the inlet of the mill body. A rectangular fixed plate is installed on the inner wall of the feed hopper. A sieve mesh is installed on the inner wall of the rectangular fixed plate. A U-shaped fixed plate is installed on the upper surface of the rectangular fixed plate. A motor is installed at the top of the inner wall of the U-shaped fixed plate. Through holes are provided on the upper surface of the sieve mesh. A rotating rod is rotatably connected inside the through holes of the sieve mesh. The output shaft of the motor is installed on the upper surface of the rotating rod. A positioning rod is installed on the outer surface of the rotating rod. The lower surface of the positioning rod abuts against the upper surface of the sieve mesh. A second bevel gear is installed on the lower surface of the rotating rod. Through holes are provided on both the left and right sides of the feed hopper. Fixed rods are rotatably connected inside the two groups of through holes of the feed hopper. Two first bevel gears are installed on the outer surface of the fixed rods. The external teeth of the two first bevel gears are meshed and connected to the inside of the second bevel gear. Two flapper plates are installed on the outer surface of the fixed rods. The upper surfaces of the two flapper plates abut against the lower surface of the sieve mesh. A support block is arranged on the inner wall of the feed hopper. A spring telescopic rod is installed on the upper surface of the support block. The spring telescopic rod is installed on the lower surface of the sieve mesh.
[0010] Further, the positioning mechanism includes two limit plates and two L-shaped connecting plates. Two clamping grooves are provided on the upper surface of the mill body. The two L-shaped connecting plates are slidably connected inside the two clamping grooves of the mill body. The two limit plates are respectively installed on the left and right sides of the feed hopper. The top parts of the inner walls of the two L-shaped connecting plates respectively abut against the upper surfaces of the two limit plates.
[0011] Further, the air dust removal mechanism includes a dust collector main body and an air duct. A clamping groove is provided on the front surface of the feed hopper. The air duct is installed inside the clamping groove of the feed hopper. The dust collector main body is placed on the upper surface of the bottom plate. A connecting pipe is installed at the suction end of the dust collector main body. The suction end of the connecting pipe is installed inside the exhaust hole of the air duct. A filter screen is arranged inside the intake end of the air duct.
[0012] Further, the protection mechanism includes two sets of hinges and magnetic blocks. Two protection covers are hinged to the upper surface of the U-shaped fixing plate through the two sets of hinges. The positions on the upper surface of the U-shaped fixing plate are parallel to the upper surface of the U-shaped fixing plate. The magnetic blocks are installed on the upper surface of the U-shaped fixing plate, and the front and rear sides of the magnetic blocks are respectively adsorbed on the adjacent sides of the two protection covers.
[0013] Further, a protection cover plate is installed on the outer surface of the rotating rod. The position of the protection cover plate is directly above the second bevel gear, and the position of the protection cover plate is at the lower end of the square frame-shaped fixing plate. An inclined surface is provided on the upper surface of the protection cover plate.
[0014] The beneficial effects of the present utility model are as follows:
[0015] 1. In the present utility model, during the rotation of the rotating rod, the second bevel gear and the two first bevel gears are driven to rotate, so that the two first bevel gears drive the two clappers to beat the sieve mesh during rotation. Further, since the spring telescopic rods are installed on the lower surface of the sieve mesh, the top ends of the spring telescopic rods drive the sieve mesh to have a larger shaking amplitude under the elastic potential energy during the process of the two clappers beating the sieve mesh, thereby minimizing the subsequent accumulation of debris inside the sieve mesh and resulting in a decrease in the feeding speed of the screening mechanism. Therefore, the practicability of the device is improved.
[0016] 2. In the present utility model, by pushing the two L-shaped connecting plates, the top parts of the inner walls of the two L-shaped connecting plates are respectively abutted against the upper surfaces of the two limiting plates, so that the two L-shaped connecting plates limit the positions of the two limiting plates moving upward at the upper end of the flour mill main body, and further the positioning mechanism positions and installs the feeding hopper inside the feeding port of the flour mill main body, thereby minimizing the subsequent movement of the feeding hopper inside the feeding port of the flour mill main body during use. Therefore, the stability of the screening mechanism during use is improved. Description of the Drawings
[0017] Figure 1 is the front structural schematic diagram of the present utility model;
[0018] Figure 2 is the top structural schematic diagram of the present utility model;
[0019] Figure 3 is the top structural schematic diagram of the sieve mesh of the present utility model;
[0020] Figure 4 is the sectional view of the funnel of the present utility model.
[0021] Reference numerals: 1, bracket; 2, main body of the flour mill; 3, screening mechanism; 301, feed hopper; 302, sieve mesh; 303, rectangular fixing plate; 304, U-shaped fixing plate; 305, motor; 306, positioning rod; 307, support block; 308, spring telescopic rod; 309, first bevel gear; 310, second bevel gear; 311, fixing rod; 312, clapper board; 313, rotating rod; 4, positioning mechanism; 401, limiting plate; 402, L-shaped connecting plate; 5, dust removal mechanism; 501, main body of the dust collector; 502, connecting pipe; 503, air duct; 504, filter screen; 6, protection mechanism; 601, hinge; 602, protection cover; 603, magnetic block; 7, bottom plate; 8, protection cover plate. Detailed implementation manners
[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0024] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.
[0025] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of the present utility model is normally placed. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.
[0026] Such as Figures 1 to 4As shown in the figure, a flour milling machine for filtering and removing impurities includes a bracket 1 and a flour milling machine main body 2. The flour milling machine main body 2 is installed on the upper surface of the bracket 1. An inlet is provided on the upper surface of the flour milling machine main body 2. Inside the inlet of the flour milling machine main body 2, a screening mechanism 3 for filtering the grains entering the inside of the flour milling machine main body 2 is provided. A protection mechanism 6 is arranged on the upper surface of the screening mechanism 3. A clamping groove is provided on the front surface of the screening mechanism 3, and a dust removal mechanism 5 is installed inside the clamping groove of the screening mechanism 3. A bottom plate 7 is arranged inside the bracket 1, and the lower surface of the dust removal mechanism 5 is placed on the upper surface of the bottom plate 7. Positioning mechanisms 4 are arranged on the left and right sides of the screening mechanism 3;
[0027] Specifically, during the process of screening grains by the screening mechanism 3, the screening device is slapped synchronously, so as to avoid subsequent accumulation of impurities inside the screening mechanism 3 and resulting in a decrease in the feeding speed of the screening mechanism 3, thus improving the practicability of the device; by clamping the screening mechanism 3 inside the inlet of the flour milling machine main body 2, the screening mechanism 3 can be disassembled, which is convenient for subsequent workers to regularly disassemble and maintain the screening mechanism 3, thus extending the service life of the screening mechanism 3.
[0028] As Figures 1 to 4 shown in the figure, the screening mechanism 3 includes a feed hopper 301, the feed hopper 301 is clamped inside the inlet of the flour milling machine main body 2. A rectangular fixed plate 303 is installed on the inner wall of the feed hopper 301. A screen 302 is installed on the inner wall of the rectangular fixed plate 303. A U-shaped fixed plate 304 is installed on the upper surface of the rectangular fixed plate 303. A motor 305 is installed at the top of the inner wall of the U-shaped fixed plate 304. Through holes are provided on the upper surface of the screen 302, and a rotating rod 313 is rotatably connected inside the through holes of the screen 302. The output shaft of the motor 305 is installed on the upper surface of the rotating rod 313. A positioning rod 306 is installed on the outer surface of the rotating rod 313, and the lower surface of the positioning rod 306 abuts against the upper surface of the screen 302. A second bevel gear 310 is installed on the lower surface of the rotating rod 313. Through holes are provided on both the left and right sides of the feed hopper 301, and a fixed rod 311 is rotatably connected inside the two groups of through holes of the feed hopper 301. Two first bevel gears 309 are installed on the outer surface of the fixed rod 311, and the external teeth of the two first bevel gears 309 are meshed and connected to the inside of the second bevel gear 310. Two clappers 312 are installed on the outer surface of the fixed rod 311, and the upper surfaces of the two clappers 312 abut against the lower surface of the screen 302. A support block 307 is arranged on the inner wall of the feed hopper 301, and a spring telescopic rod 308 is installed on the upper surface of the support block 307. The spring telescopic rod 308 is installed on the lower surface of the screen 302;
[0029] Specifically, after the grains are added into the interior of the feed hopper 301, the motor 305 is started to drive the rotating rod 313 and the positioning rod 306 to rotate, so as to scatter the grains accumulated in the interior of the feed hopper 301, and then the grains falling into the interior of the flour mill main body 2 are filtered through the screen 302, thereby minimizing the entry of subsequent sundries into the interior of the flour mill main body 2; during the rotation of the rotating rod 313, the second bevel gear 310 and the two first bevel gears 309 are driven to rotate, so that the two first bevel gears 309 drive the two flap plates 312 to beat the screen 302 during rotation, and the spring telescopic rods 308 are installed on the lower surface of the screen 302, so that the top ends of the two spring telescopic rods 308 drive the shaking amplitude of the screen 302 to expand under the elastic potential energy during the beating of the two flap plates 312 on the screen 302, thereby minimizing the accumulation of subsequent sundries in the screen 302 and resulting in a decrease in the feeding speed of the screening mechanism 3, thus improving the practicability of the device.
[0030] Meanwhile, the feed hopper 301 is clamped inside the feed inlet of the flour mill main body 2, so that the feed hopper 301 can be disassembled, thereby facilitating the subsequent regular disassembly and maintenance of the screening mechanism 3 by the staff, thus increasing the service life of the screening mechanism 3.
[0031] As Figure 1 and Figure 2 As shown, the positioning mechanism 4 includes two limiting plates 401 and two L-shaped connecting plates 402. Two card slots are provided on the upper surface of the flour mill main body 2. The two L-shaped connecting plates 402 are slidably connected inside the two card slots of the flour mill main body 2. The two limiting plates 401 are respectively installed on the left and right sides of the feed hopper 301. The top parts of the inner walls of the two L-shaped connecting plates 402 are respectively abutted against the upper surfaces of the two limiting plates 401.
[0032] Specifically, after the feed hopper 301 is installed and positioned inside the feed inlet of the flour mill main body 2, by pushing the two L-shaped connecting plates 402, the top parts of the inner walls of the two L-shaped connecting plates 402 are respectively abutted against the upper surfaces of the two limiting plates 401, so that the two L-shaped connecting plates 402 limit the positions of the two limiting plates 401 to move upward at the upper end of the flour mill main body 2, and further the positioning mechanism 4 positions and installs the feed hopper 301 inside the feed inlet of the flour mill main body 2, thereby minimizing the subsequent movement of the feed hopper 301 inside the feed inlet of the flour mill main body 2 during use, thus improving the stability of the screening mechanism 3 during use.
[0033] As Figures 1 to 4As shown in the figure, the dust removal mechanism 5 includes a dust collector main body 501 and an air duct 503. A clamping groove is formed on the front surface of the feed hopper 301, and the air duct 503 is installed inside the clamping groove of the feed hopper 301. The dust collector main body 501 is placed on the upper surface of the bottom plate 7. A connecting pipe 502 is installed at the suction end of the dust collector main body 501, and the suction end of the connecting pipe 502 is installed inside the exhaust hole of the air duct 503. A filter screen 504 is arranged inside the air inlet end of the air duct 503. Specifically, when the grains to be filtered are relatively dry, by starting the dust collector main body 501, the dust generated inside the feed hopper 301 is sucked into its own interior along the air duct 503 and the connecting pipe 502, so that the dust accumulation inside the feed hopper 301 can be cleaned during the use of the dust removal mechanism 5, thus minimizing the inhalation of a large amount of dust by the surrounding staff during the operation of the subsequent flour mill main body 2. By setting the filter screen 504 at the opening of the air inlet end of the air duct 503, the movement path of the grains inside the feed hopper 301 is restricted by the filter screen 504, thus minimizing the entry of the grains subsequently introduced into the feed hopper 301 into the interior of the air duct 503.
[0034] As Figures 1 to 3 shown in the figure, the protection mechanism 6 includes two sets of hinges 601 and magnetic blocks 603. Two sets of protective covers 602 are hinged on the upper surface of the U-shaped fixing plate 304 through two sets of hinges 601. The position on the upper surface of the U-shaped fixing plate 304 is parallel to the position on the upper surface of the U-shaped fixing plate 304. The magnetic blocks 603 are installed on the upper surface of the U-shaped fixing plate 304, and the front and rear sides of the magnetic blocks 603 are respectively adsorbed on the adjacent sides of the two sets of protective covers 602. Specifically, when the device is idle, by rotating the two sets of protective covers 602, the lower surfaces of the two sets of protective covers 602 are attached to the upper surface of the feed hopper 301, so that the two sets of hinges 601 block the interior of the feed hopper 301, thus minimizing the accumulation of dust and sundries inside the feed hopper 301 during the subsequent idle period. When the feed hopper 301 is in use, by rotating the two sets of protective covers 602, the adjacent sides of the two sets of protective covers 602 are adsorbed on the front and rear sides of the magnetic blocks 603, so that the magnetic blocks 603 limit the positions of the two sets of protective covers 602 during the idle period, thus minimizing the subsequent blocking of the staff from adding processing raw materials into the feed hopper 301 during the idle period of the two sets of protective covers 602.
[0035] As Figure 4As shown in the figure, a protective cover plate 8 is installed on the outer surface of the rotating rod 313. The position of the protective cover plate 8 is set directly above the second bevel gear 310 and below the square frame-shaped fixing plate 303. The upper surface of the protective cover plate 8 is provided with an inclined surface. Specifically, by setting the position of the protective cover plate 8 directly above the second bevel gear 310, the protective cover plate 8 shields the second bevel gear 310 and the two first bevel gears 309, thus minimizing the chance of the grains after sieving by the sieve 302 falling onto the connection between the second bevel gear 310 and the two first bevel gears 309 and causing blockage at the connection between the two first bevel gears 309 and the second bevel gear 310. By setting the upper surface of the protective cover plate 8 as an inclined surface, the grains that subsequently fall onto the upper surface of the protective cover plate 8 are not likely to accumulate on the upper surface of the protective cover plate 8.
[0036] In summary: By starting the motor 305 to drive the rotation of the rotating rod 313 and the positioning rod 306, the grains accumulated inside the feed hopper 301 are scattered, and then the grains falling into the main body 2 of the flour mill are filtered by the sieve 302, thus minimizing the chance of subsequent foreign objects entering the interior of the main body 2 of the flour mill. During the rotation of the rotating rod 313, the second bevel gear 310 and the two first bevel gears 309 are driven to rotate, so that the two first bevel gears 309 drive the two clappers 312 to beat the sieve 302 during rotation. Since the spring telescopic rods 308 are installed on the lower surface of the sieve 302, the top ends of the spring telescopic rods 308 drive the sieve 302 to have a larger shaking amplitude under the elastic potential energy during the process of the two clappers 312 beating the sieve 302, thus minimizing the chance of subsequent foreign objects accumulating inside the sieve 302 and causing a decrease in the feeding speed of the screening mechanism 3.
[0037] Meanwhile, by pushing the two L-shaped connecting plates 402, the upper parts of the inner walls of the two L-shaped connecting plates 402 are respectively abutted against the upper surfaces of the two limiting plates 401, so that the two L-shaped connecting plates 402 limit the positions of the two limiting plates 401 moving upward at the upper end of the main body 2 of the flour mill. Furthermore, the positioning mechanism 4 positions and installs the feed hopper 301 inside the feed inlet of the main body 2 of the flour mill, thus minimizing the chance of the subsequent feed hopper 301 moving inside the feed inlet of the main body 2 of the flour mill during use. By starting the dust collector main body 501, the dust generated inside the feed hopper 301 is sucked into its own interior along the air duct 503 and the connecting pipe 502, so that the dust collecting mechanism 5 cleans the dust accumulated inside the feed hopper 301 during use, thus minimizing the chance of the subsequent workers around the main body 2 of the flour mill inhaling a large amount of dust during the working process.
[0038] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present utility model. Without departing from the spirit and scope of the present utility model, various changes and improvements will occur to the present utility model, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A flour milling machine for grain processing that can filter and remove impurities, comprising a bracket (1) and a flour milling machine main body (2), characterized in that: The main body (2) of the flour mill is installed on the upper surface of the bracket (1). An inlet is provided on the upper surface of the main body (2) of the flour mill. Inside the inlet of the main body (2) of the flour mill, a screening mechanism (3) for filtering the grains entering the main body (2) of the flour mill is provided. A protection mechanism (6) is arranged on the upper surface of the screening mechanism (3). A clamping groove is provided on the front surface of the screening mechanism (3), and a dust removal mechanism (5) is installed inside the clamping groove of the screening mechanism (3). A bottom plate (7) is arranged inside the bracket (1), and the lower surface of the dust removal mechanism (5) is placed on the upper surface of the bottom plate (7). Positioning mechanisms (4) are arranged on the left and right sides of the screening mechanism (3).
2. The wheat flour milling machine capable of filtering and removing impurities according to claim 1, wherein: The screening mechanism (3) includes a feed hopper (301). The feed hopper (301) is clamped inside the inlet of the main body (2) of the flour mill. A rectangular fixed plate (303) is installed on the inner wall of the feed hopper (301). A screen (302) is installed on the inner wall of the rectangular fixed plate (303). A U-shaped fixed plate (304) is installed on the upper surface of the rectangular fixed plate (303). A motor (305) is installed at the top of the inner wall of the U-shaped fixed plate (304). Through holes are provided on the upper surface of the screen (302), and a rotating rod (313) is rotatably connected inside the through holes of the screen (302). The output shaft of the motor (305) is installed on the upper surface of the rotating rod (313). A positioning rod (306) is installed on the outer surface of the rotating rod (313), and the lower surface of the positioning rod (306) abuts against the upper surface of the screen (302). A second bevel gear (310) is installed on the lower surface of the rotating rod (313). Through holes are provided on both the left and right sides of the feed hopper (301), and a fixed rod (311) is rotatably connected inside the two groups of through holes of the feed hopper (301). Two first bevel gears (309) are installed on the outer surface of the fixed rod (311), and the external teeth of the two first bevel gears (309) are meshed and connected inside the second bevel gear (310). Two clappers (312) are installed on the outer surface of the fixed rod (311), and the upper surfaces of the two clappers (312) abut against the lower surface of the screen (302). A support block (307) is arranged on the inner wall of the feed hopper (301), and a spring telescopic rod (308) is installed on the upper surface of the support block (307). The spring telescopic rod (308) is installed on the lower surface of the screen (302).
3. The flour milling machine for processing grain capable of filtering and removing impurities according to claim 2, wherein: The positioning mechanism (4) includes two limiting plates (401) and two L-shaped connecting plates (402). Two clamping grooves are provided on the upper surface of the main body (2) of the flour mill, and the two L-shaped connecting plates (402) are slidably connected inside the two clamping grooves of the main body (2) of the flour mill. The two limiting plates (401) are respectively installed on the left and right sides of the feed hopper (301), and the top parts of the inner walls of the two L-shaped connecting plates (402) respectively abut against the upper surfaces of the two limiting plates (401).
4. A flour milling machine for grain processing capable of filtering and removing impurities according to claim 2, characterized in that: The dust removal mechanism (5) includes a dust collector main body (501) and an air duct (503). A clamping groove is formed on the front surface of the feed hopper (301), and the air duct (503) is installed inside the clamping groove of the feed hopper (301). The dust collector main body (501) is placed on the upper surface of the bottom plate (7). A connecting pipe (502) is installed at the suction end of the dust collector main body (501), and the suction end of the connecting pipe (502) is installed inside the exhaust hole of the air duct (503). A filter screen (504) is arranged inside the intake end of the air duct (503).
5. The flour mill for grain milling and impurity removal according to claim 2, wherein: The protection mechanism (6) includes two sets of hinges (601) and magnetic blocks (603). Two protective covers (602) are hinged on the upper surface of the U-shaped fixing plate (304) through the two sets of hinges (601). The position on the upper surface of the U-shaped fixing plate (304) is parallel to the position on the upper surface of the U-shaped fixing plate (304). The magnetic blocks (603) are installed on the upper surface of the U-shaped fixing plate (304), and the front and rear sides of the magnetic blocks (603) are respectively adsorbed on the adjacent sides of the two protective covers (602).
6. The wheat flour mill for grain powder processing capable of filtering and removing impurities according to claim 2, wherein: A protective cover plate (8) is installed on the outer surface of the rotating rod (313). The position of the protective cover plate (8) is directly above the second bevel gear (310). The position of the protective cover plate (8) is below the square frame-shaped fixing plate (303). An inclined surface is formed on the upper surface of the protective cover plate (8).