A multi-stage screening apparatus for flour processing and a method of operation thereof

Abstract

The application discloses a multi-stage screening device for flour processing and a working method thereof, which comprises a mounting rack, a flour milling machine is mounted on the mounting rack, a pre-processing sieve cylinder is mounted on the top of the mounting rack, a rotating disc is rotationally connected to the bottom of the inner side of the pre-processing sieve cylinder, two internally hollow stirring rods are fixedly connected to the top of the rotating disc, and two change processing assemblies for pre-milling and stirring are arranged on the inner side of the rotating disc; the processing rod is in a rotating state, the first screening area generates suction wind, the wheat can be crushed to pass through the sieve hole of the pre-processing sieve cylinder and enter the first screening area to be discharged into the flour milling machine for fine processing, and the extruded and sheet-shaped germ can be collected in the second screening area, so that the pretreatment of part of the wheat bran and germ impurities is realized before flour processing, fine milling and screening of the flour are facilitated, the quality of the produced flour is easy to control, and the working efficiency of the processed flour is improved.

Description

Technical Field

[0001] This invention relates to the field of flour processing equipment technology, specifically a multi-stage screening device for flour processing and its working method. Background Technology

[0002] During flour processing, a vibrating screen is used to remove impurities from the wheat, ensuring the wheat is clean and free of impurities. Water washing further cleans the wheat, guaranteeing the hygiene of the flour. The wheat is then transported by a conveyor belt and continuously milled using specialized equipment to easily produce flour. The milled coarse flour then falls into a screening mechanism to efficiently separate the flour from the bran, while simultaneously extracting the germ. Finally, it is packaged. Screening the milled flour can easily result in some of the crushed material remaining in the flour, affecting the quality of the flour and reducing the efficiency of subsequent screening processes. Therefore, a multi-stage screening device for flour processing is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-stage screening device and its working method for flour processing. By pre-treating some wheat bran and germ impurities before flour processing, it facilitates subsequent fine milling and screening of the flour, making it easier to control the quality of the produced flour and improve the efficiency of flour processing. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A multi-stage screening device for flour processing includes a mounting frame on which a flour mill is mounted. A pre-processing sieve cylinder is mounted on the top of the mounting frame. A rotating disk is rotatably connected to the bottom inner side of the pre-processing sieve cylinder. Two hollow stirring rods are fixedly connected to the top of the rotating disk. Two conversion processing components for pre-grinding and stirring are provided inside the rotating disk. Each conversion processing component includes a processing rod and an extension positioning block. The processing rod is slidably connected to the rotating disk. The movement of the processing rod and the stirring rod forms a third screening zone for attracting wheat bran. The processing rod contacts the inner wall of the pre-processing sieve cylinder to form a first screening zone for attracting flour. A second screening zone is formed on the top of the rotating disk for collecting the germ that has been extruded into flakes by the processing rod.

[0006] As a further embodiment of the present invention: the two processing rods and the two stirring rods are evenly distributed inside the pre-processing screen cylinder, and the outer wall of the stirring rod has stirring blades that contact the material; the stirring rod can fully contact the material, and the processing rod also plays a stirring role during the movement, thereby stirring the material inside the pre-processing screen cylinder. The purpose of stirring is to knock off the wheat bran by impacting the material with the processing rod, stirring rod and inner wall of the pre-processing screen cylinder.

[0007] As a further embodiment of the present invention: a top movable disk is rotatably connected to the top of the pre-processing screen cylinder, one end of the processing rod passes through the top movable disk, and an outer positioning block is rotatably connected to the outer wall of the processing rod. A first driving member for driving the movement of the processing rod is installed on the outer positioning block, and a second driving member is provided on the processing rod. The second driving member is slidably connected to the top movable disk. Under the action of the first driving member, the processing rod can be driven to move horizontally, so that the processing rod moves towards the inner wall of the pre-processing screen cylinder, which facilitates the switching of the processing rod to the functions of grinding and stirring. At the same time, when the second driving member is activated, it can drive the processing rod to rotate, and grinding can be performed under the action of the processing rod and the inner wall of the pre-processing screen cylinder.

[0008] As a further embodiment of the present invention: both of the bottom ends of the two stirring rods are sealed with a conveying pipe, and two diverter pipes for liquid inlet and gas inlet are fixedly installed on the conveying pipes. The stirring rods are provided with a number of gas-liquid holes, which correspond to the positions of the processing rods. Liquid and gas can be conveyed into the stirring rods through the diverter pipes. When one diverter pipe is open, the other diverter pipe is closed. The liquid and gas can be used to clean and dry the material respectively.

[0009] As a further embodiment of the present invention: a conical diffuser is fixedly connected to the center of the top movable plate, and an aspiration pipe for conveying and aspirating gas is installed on the outside of the conical diffuser. The bottom end face of the conical diffuser is opposite to the third screening zone. Under the action of the aspiration pipe, the third screening zone can generate a suction air towards the inside of the pre-processing screen cylinder. The aspiration pipe can be connected to an external fan. The conical diffuser can facilitate the aspiration of wheat bran in the third screening zone.

[0010] As a further embodiment of the present invention: the inner wall of the pre-processing screen cylinder has sieve holes for filtering flour, and the inner side of the first screening zone has suction air for attracting flour, and the first screening zone is connected to the flour mill; when wheat is ground by the action of the processing rod, the wheat can be crushed to pass through the sieve holes of the pre-processing screen cylinder and enter the first screening zone and be discharged into the flour mill for fine processing.

[0011] As a further aspect of the present invention: the inner wall of the pre-processing screen cylinder is conical, and the outer side of the pre-processing screen cylinder has a closed cover that is hinged to the second screening zone; the first screening zone is conical, which allows the material to slide along its inner wall, thereby allowing the material to be passed into the next processing equipment for fine processing; the closed cover can be connected to the pre-processing screen cylinder by bolts, and opening the closed cover allows the germ collected in the second screening zone to be processed.

[0012] As a further embodiment of the present invention: the two processing rods and the two stirring rods are parallel to the inner wall of the pre-processing screen cylinder, and the angle between the processing rods, the stirring rods and the rotating disk is 30 degrees; the two processing rods and the two stirring rods agitate the material in the pre-processing screen cylinder, and are inclined, so that the material is easily located at the bottom position, and the material is inclined and expanded at the upper position of the rods, so that the processing rods and stirring rods can come into contact with the material.

[0013] As a further aspect of the present invention, a multi-stage screening device for flour processing includes the following usage method:

[0014] A: Pre-treatment is performed by feeding material into the pre-processing screen cylinder. The processing rod and the stirring rod rotate inside the pre-processing screen cylinder, stirring the material inside the pre-processing screen cylinder. At this time, the material impacts the processing rod, the stirring rod and the inner wall of the pre-processing screen cylinder to wash away the wheat bran. The wheat bran is then drawn out through the third screening zone.

[0015] B: The conveying pipe is opened to deliver liquid into the stirring rod and spray it out from the gas-liquid hole. The wheat is washed inside the pre-processing screen cylinder. During the washing process, the material can be stirred and drying air is delivered through the conveying pipe to dry the material.

[0016] C: Drive the processing rod to move towards the inner wall of the pre-processing screen cylinder. The processing rod is in a rotating state, and the material is blown towards the processing rod through the gas-liquid hole. The first screening zone generates suction wind, which can crush the wheat into the first screening zone through the screen hole of the pre-processing screen cylinder and discharge it into the flour mill for fine processing. The extruded and sheet-like germ can be collected in the second screening zone.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] By pre-treating the material by feeding it into the pre-processing screen cylinder, the processing rod and stirring rod rotate inside the pre-processing screen cylinder. At this time, the material impacts the processing rod, stirring rod, and the inner wall of the pre-processing screen cylinder, washing away the wheat bran. The wheat bran is then suctioned out through the third screening zone. The conveying pipe is opened to deliver liquid into the stirring rod and spray it out from the gas-liquid hole. The wheat is washed inside the pre-processing screen cylinder. During the washing process, the material can be stirred, and drying air is delivered through the conveying pipe to dry the material. The position of the processing rod is changed, driving the processing rod to move towards the inner wall of the pre-processing screen cylinder. While the processing rod is rotating, the material is blown towards the processing rod through the gas-liquid hole. The first screening zone generates suction air, which can crush the wheat and allow it to pass through the sieve holes of the pre-processing screen cylinder into the first screening zone and be discharged into the flour mill for fine processing. The extruded and sheet-like germ can be collected in the second screening zone. This pre-treatment of some wheat bran and germ impurities before flour processing facilitates subsequent fine grinding and screening of the flour, making it easier to control the quality of the produced flour and improve the efficiency of flour processing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a multi-stage screening device for flour processing and its working method;

[0021] Figure 2 This is a schematic diagram of the internal structure of a pre-processing screen cylinder in a multi-stage screening device for flour processing.

[0022] Figure 3 A cross-sectional view of a multi-stage screening device for flour processing;

[0023] In the diagram: 1. Mounting frame; 2. Pre-processing screen cylinder; 21. Rotary disc; 22. First screening zone; 23. Second screening zone; 24. Top movable disc; 3. Changing processing component; 31. Processing rod; 32. First driving component; 33. Second driving component; 34. Outer positioning block; 4. Stirring rod; 41. Gas-liquid hole; 42. Conveying pipe; 5. Conical diffuser; 51. Suction pipe; 6. Third screening zone. Detailed Implementation

[0024] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0025] Please see Figures 1-3 In this embodiment of the invention, a multi-stage screening device for flour processing includes a mounting frame 1, on which a flour mill is mounted. A pre-processing sieve cylinder 2 is mounted on the top of the mounting frame 1. A rotating disk 21 is rotatably connected to the bottom inner side of the pre-processing sieve cylinder 2. Two hollow stirring rods 4 are fixedly connected to the top of the rotating disk 21. Two conversion processing components 3 for pre-grinding and stirring are provided inside the rotating disk 21. The conversion processing components 3 include a processing rod 31 and an extension positioning block 34. The processing rod 31 is slidably connected to the rotating disk 21. The movement of the processing rod 31 and the stirring rods 4 forms a third screening zone 6 for attracting wheat bran. The processing rod 31 contacts the inner wall of the pre-processing sieve cylinder 2 to form a first screening zone 22 for attracting flour. A second screening zone 23 is formed on the top of the rotating disk 21 for collecting the germ that has been squeezed into flakes by the processing rod 31.

[0026] In this implementation scheme: Before processing the flour, impurities in the wheat can be pre-screened. A feed hopper can be installed on the pre-processing sieve cylinder 2 to feed the wheat into the interior of the pre-processing sieve cylinder 2 for flour processing. The rotating disc 21 is started by connecting a motor, causing it to rotate inside the pre-processing sieve cylinder 2, which in turn rotates the processing rods 31 and the stirring rods 4. The two processing rods 31 and two stirring rods 4 are evenly distributed inside the pre-processing sieve cylinder 2. The outer wall of the stirring rods 4 has stirring blades that contact the material, ensuring sufficient contact between the stirring rods 4 and the material. During the movement of the processing rod 31, it also acts as a stirrer, thereby agitating the material inside the pre-processing screen cylinder 2. The purpose of stirring is to knock off the wheat bran by impacting the material with the processing rod 31, stirring rod 4, and the inner wall of the pre-processing screen cylinder 2. During this process, the third screening zone 6 can generate suction air towards the inside of the pre-processing screen cylinder 2 under the action of the suction pipe 51. The suction pipe 51 can be connected to an external fan. The conical diffuser 5 can facilitate the suction of wheat bran in the third screening zone 6. The wheat can remain inside the pre-processing screen cylinder 2 and will not be attracted into the third screening zone 6. The wheat bran is discharged to the outside through the suction pipe 51, thus achieving the purpose of screening.

[0027] During the wheat washing process, after processing the wheat bran, both stirring rods 4 are sealed at their bottom ends with conveying pipes 42. Two branch pipes for liquid and air intake are fixedly installed on the conveying pipes 42. The stirring rods 4 have several air-liquid holes 41, which correspond to the positions of the processing rods 31. The conveying pipes 42 can be used to clean the wheat. The two branch pipes are connected to a water pump and a blower, respectively. By turning on the water pump, liquid can be introduced into the stirring rods 4 through the conveying pipes 42. The liquid can be sprayed out from the air-liquid holes 41 and placed inside the pre-processing screen cylinder 2 to wash the wheat. During the washing process, the material is agitated, allowing the water to fully contact the wheat, further... The wheat is washed first. By setting a discharge hole on the pre-processing screen cylinder 2, the water can be discharged from the inside of the pre-processing screen cylinder 2. After discharge, drying air can be conveyed through the conveying pipe 42 to dry the material. At the same time, the internal environment of the pre-processing screen cylinder 2 can be dried. During operation, the internal environment of the pre-processing screen cylinder 2 can be treated by the suction air in the first screening zone 22 and the suction air in the third screening zone 6. If liquid flows into the first screening zone 22, a guide surface can be set inside it to prevent the liquid from entering the flour mill. The internal environment of the pre-processing screen cylinder 2 is in a dry state for subsequent processing.

[0028] In the pre-processing of flour, the two processing rods 31 and the two stirring rods 4 are parallel to the inner wall of the pre-processing sieve cylinder 2, and the angle between the processing rods 31, the stirring rods 4 and the rotating disk 21 is 30 degrees. Under the action of the processing rods 31, the first driving component 32 (which can be a cylinder) can drive the processing rods 31 to move horizontally, causing them to move towards the inner wall of the pre-processing sieve cylinder 2. This facilitates switching the processing rods 31 to the functions of grinding and stirring. Simultaneously, the second driving component 33 (which can be a motor) moves along the top movable disk 24. When the second driving component 33 starts, it drives the processing rods 31 to rotate. When the processing rods 31 are rotating inside the pre-processing sieve cylinder 2, the processing rods 31 can drive the top movable disk 24 to move, allowing the top movable disk 24 to... If the rotation is possible, the first drive component 32 and the second drive component 33 can rotate on the top movable plate 24, which does not affect the installation and use of the overall mechanism. When the processing rod 31 rotates, the material can be blown towards the processing rod 31 through the gas-liquid hole 41. The gas-liquid hole 41 can restrict the position of the material, so that the material can cooperate with the processing rod 31. The first screening zone 22 generates suction wind. The principle of generating suction wind is that by connecting a fan to the outside, it can act on the inside of the first screening zone 22, thereby generating the required suction force towards the side position of the pre-processing screen cylinder 2. When the wheat is ground by the action of the processing rod 31, it can be crushed and enter the first screening zone 22 through the screen hole of the pre-processing screen cylinder 2 and discharged into the flour mill for fine processing. The first screening zone 22 is conical in shape, which allows the material to slide along its inner wall, thereby allowing the material to be passed into the next processing equipment to achieve fine processing.

[0029] Another screening process involves the processing rod 31 grinding the wheat, which can compress the germ into flakes. The flakes of germ can be placed in the second screening zone 23 along the inner wall of the pre-processing screen cylinder 2. When the germ is in the second screening zone 23, it can be collected. The closed cover plate set on the pre-processing screen cylinder 2 can be opened to process the germ collected in the second screening zone 23.

[0030] like Figures 1-3 As shown, the present invention also provides a method for using a multi-stage screening device for flour processing, the specific steps of which are as follows:

[0031] A: Pre-treatment is carried out by feeding material into the pre-processing screen cylinder 2. The processing rod 31 and the stirring rod 4 rotate in the pre-processing screen cylinder 2 to stir the material in the pre-processing screen cylinder 2. At this time, the material impacts the processing rod 31, the stirring rod 4 and the inner wall of the pre-processing screen cylinder 2 to wash away the wheat bran. The wheat bran is then drawn out through the third screening zone 6.

[0032] B: Open the conveying pipe 42 to convey liquid into the stirring rod 4 and spray it out from the gas-liquid hole 41. The wheat is washed in the pre-processing screen cylinder 2. During the washing process, the material can be stirred and the material can be dried by conveying dry air through the conveying pipe 42.

[0033] C: Drive the processing rod 31 to move towards the inner wall of the pre-processing screen cylinder 2. The processing rod 31 is in a rotating state, and the material is blown towards the processing rod 31 through the gas-liquid hole 41. The first screening zone 22 generates suction wind, which can crush the wheat into the first screening zone 22 through the screen hole of the pre-processing screen cylinder 2 and discharge it into the flour mill for fine processing. The extruded and sheet-like germ can be collected in the second screening zone 23.

[0034] The working principle of this invention is as follows: Before processing the flour, wheat is introduced into the pre-processing sieve cylinder 2 for processing. The rotating disk 21 is activated, causing it to rotate inside the pre-processing sieve cylinder 2, which in turn rotates the processing rod 31 and the stirring rod 4. The stirring rod 4 makes full contact with the material, and the processing rod 31 also acts as a stirrer during its movement, thus agitating the material within the pre-processing sieve cylinder 2. During this process, the third screening zone 6, under the action of the suction pipe 51, generates suction air towards the inside of the pre-processing sieve cylinder 2, and the wheat bran is discharged to the outside through the suction pipe 51. After the boundary is cleared, the conveying pipe 42 can be used. The two branch pipes are connected to the water pump and the blower respectively. By turning on the water pump, liquid can be introduced into the stirring rod 4 through the conveying pipe 42. The liquid can be sprayed out from the gas-liquid hole 41 and placed in the pre-processing screen cylinder 2 to wash the wheat. During the washing process, the material can be stirred so that the water can fully contact the wheat and further clean the wheat. After the liquid is discharged, drying air can be conveyed through the conveying pipe 42 to dry the material and the internal environment of the pre-processing screen cylinder 2. Under the action of the processing rod 31, the processing rod 31 is driven to move. Under the action of component 32, the processing rod 31 can be driven to move horizontally, so that the processing rod 31 moves towards the inner wall of the pre-processing screen cylinder 2, making it easier for the processing rod 31 to switch to the functions of grinding and stirring. At the same time, the second drive component 33 can move along the top movable plate 24. When the second drive component 33 is started, it can drive the processing rod 31 to rotate. When the processing rod 31 rotates, it can blow the material through the gas-liquid hole 41 towards the processing rod 31. The gas-liquid hole 41 can restrict the position of the material, so that the material can cooperate with the processing rod 31. The suction wind generated by the first screening zone 22 can act on the first screening zone. Inside the pre-processing screen cylinder 2, the required attraction force can be generated to the side of the pre-processing screen cylinder 2. When the wheat is ground by the action of the processing rod 31, it can be crushed and enter the first screening zone 22 through the screen holes of the pre-processing screen cylinder 2 and discharged into the flour mill for fine processing. During the grinding process of the processing rod 31, the germ can be squeezed into flakes. The flake germ can be located in the second screening zone 23 along the inner wall of the pre-processing screen cylinder 2. When the germ is located in the second screening zone 23, it is collected. The material slides along the inner wall of the first screening zone 22, so that the material can be passed into the next processing equipment to achieve fine processing.

[0035] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage screening device for flour processing, comprising a mounting frame (1) on which a flour mill is mounted, characterized in that, The mounting frame (1) is equipped with a pre-processing screen cylinder (2) on top. A rotating disk (21) is rotatably connected to the bottom inner side of the pre-processing screen cylinder (2). Two hollow stirring rods (4) are fixedly connected to the top of the rotating disk (21). Two transformation processing components (3) for pre-grinding and stirring are provided inside the rotating disk (21). The transformation processing component (3) includes a processing rod (31) and an outer positioning block (34). The processing rod (31) is slidably connected to the rotating disk (21). The processing rod (31) is connected to the pre-processing screen cylinder (21) 2) The inner wall is formed with a first screening zone (22) for attracting flour, and the top of the rotating disk (21) is formed with a second screening zone (23) for collecting the germ that has been squeezed into flakes by the processing rod (31); the processing rod (31) and the stirring rod (4) rotate in the pre-processing screen cylinder (2) to stir the material in the pre-processing screen cylinder (2). At this time, the material hits the processing rod (31), the stirring rod (4) and the inner wall of the pre-processing screen cylinder (2) to wash away the wheat bran, and is then attracted out by the third screening zone (6).

2. The multi-stage screening device for flour processing according to claim 1, characterized in that, The two processing rods (31) and the two stirring rods (4) are evenly distributed inside the pre-processing screen cylinder (2), and the outer wall of the stirring rod (4) has stirring blades that are in contact with the material.

3. The multi-stage screening device for flour processing according to claim 1, characterized in that, The top of the pre-processed screen cylinder (2) is rotatably connected to a top movable disk (24). One end of the processing rod (31) passes through the top movable disk (24), and an outer positioning block (34) is rotatably connected to the outer wall of the processing rod (31). A first driving member (32) for driving the processing rod (31) to move is installed on the outer positioning block (34), and a second driving member (33) is provided on the processing rod (31). The second driving member (33) is slidably connected to the top movable disk (24).

4. The multi-stage screening device for flour processing according to claim 1, characterized in that, Both stirring rods (4) are sealed at their bottom ends with a delivery pipe (42). Two diversion pipes for liquid inlet and gas inlet are fixedly installed on the delivery pipe (42). The stirring rod (4) has several gas-liquid holes (41) that correspond to the position of the processing rod (31).

5. A multi-stage screening device for flour processing according to claim 3, characterized in that, A conical diffuser (5) is fixedly connected to the center of the top movable plate (24). An aspiration tube (51) for conveying and aspirating gas is installed on the outside of the conical diffuser (5). The bottom end face of the conical diffuser (5) is opposite to the third screening area (6).

6. A multi-stage screening device for flour processing according to claim 1, characterized in that, The inner wall of the pre-processing sieve cylinder (2) has sieve holes for filtering flour, and the inner side of the first screening zone (22) has suction air for attracting flour. The first screening zone (22) is connected to the flour mill.

7. A multi-stage screening device for flour processing according to claim 1, characterized in that, The inner wall of the pre-processed screen cylinder (2) is conical, and the outer side of the pre-processed screen cylinder (2) has a closed cover that is hinged to the second screening area (23).

8. A multi-stage screening device for flour processing according to claim 1, characterized in that, The two processing rods (31) and the two stirring rods (4) are parallel to the inner wall of the pre-processing screen cylinder (2), and the angle between the processing rods (31), the stirring rods (4) and the rotating disk (21) is 30 degrees.

9. A multi-stage screening device for flour processing according to claim 4, characterized in that: Including usage methods in the following situations: A: Pre-treatment is carried out by feeding material into the pre-processing screen cylinder (2). The processing rod (31) and the stirring rod (4) rotate in the pre-processing screen cylinder (2) to stir the material in the pre-processing screen cylinder (2). At this time, the material impacts the processing rod (31), the stirring rod (4) and the inner wall of the pre-processing screen cylinder (2) to wash away the wheat bran. The wheat bran is then drawn out through the third screening zone (6). B: Open the conveying pipe (42) to convey liquid into the stirring rod (4) and spray it out from the gas-liquid hole (41). The wheat is washed in the pre-processing screen cylinder (2). During the washing process, the material can be stirred and dry air is conveyed through the conveying pipe (42) to dry the material. C: Drive the processing rod (31) to move toward the inner wall of the pre-processing screen cylinder (2). The processing rod (31) is in a rotating state, and blow the material through the gas-liquid hole (41) toward the processing rod (31). The first screening zone (22) generates suction wind, which can crush the wheat into the first screening zone (22) through the sieve hole of the pre-processing screen cylinder (2) and discharge it into the flour mill for fine processing. The extruded and sheet-like germ can be collected in the second screening zone (23).

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