Starch grinding and grading device

Abstract

The utility model discloses a starch grinding and grading device, which relates to the field of powder grading and comprises a tank body, the top end of the tank body is fixedly connected with a fine material pipe, a grading impeller is arranged above the inner wall of the tank body, and an airflow distribution cone is formed at the bottom end of the grading impeller. The output end of the grading impeller is connected with the input end of the fine material pipe, the top end of the tank body is provided with a driving mechanism penetrating to the inner wall of the induced draft fan, and the driving mechanism is used for driving the grading impeller to rotate; a cleaning mechanism is installed on the inner wall of the induced draft fan and connected with the outer wall of the airflow distribution cone. By arranging the cleaning mechanism, when the inner wall of the tank body needs to be cleaned, the air pump connected with the air pipe is started, air is finally sprayed out of the nozzle, and the sprayed air can blow down starch attached to the inner wall of the tank body.

Description

Technical Field

[0001] The utility model relates to the field of powder classification, in particular to a starch grinding and classification device. Background Art

[0002] Starch is modified by grinding, and the modified starch has better cold paste and hot paste stability, which expands the application of starch in high, medium and low viscosity systems.

[0003] In the prior art, when the grinding device grinds starch, the ground starch enters the tank through the induced draft fan and is screened by the sorting impeller. Qualified fine materials are discharged through the fine material pipe, and unqualified coarse materials are discharged through the coarse material pipe and pushed back into the grinding device by the screw feeder for further grinding.

[0004] The powder after grinding has a fine particle size and is very easy to adhere to the inner wall of the tank, making it impossible to clean it effectively. When the equipment is not started, the starch is easily denatured if it is not treated for a long time, which affects the quality of the starch. Utility Model Content

[0005] The purpose of the utility model is to provide a starch grinding and grading device in order to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a starch grinding and grading device, comprising a tank body, the top end of which is rotatably connected to a fine material pipe, a grading impeller is installed above the inner wall of the tank body, an air flow distribution cone is formed at the bottom end of the grading impeller, the output end of the grading impeller is connected to the input end of the fine material pipe, and a driving mechanism penetrating through the inner wall of the tank body is installed at the top end of the tank body, and the driving mechanism is used to drive the grading impeller to rotate;

[0007] A cleaning mechanism is installed on the inner wall of the tank body, and the cleaning mechanism is connected to the outer wall of the air flow distribution cone;

[0008] The cleaning mechanism comprises a fixed unit and a rotating unit, wherein the fixed unit is fixedly connected to the inner wall of the tank body, the rotating unit is rotatably connected to the open end of the fixed unit, and the fixed unit is connected to the airflow distribution cone via a fixed frame;

[0009] There are multiple fixing frames, and the multiple grading impellers are equidistantly distributed along the circumferential direction of the airflow distribution cone.

[0010] As a further solution of the utility model: the fixing unit comprises a fixing ring welded to the inner wall of the tank body, and the inner circumference of the fixing ring is an open structure;

[0011] The outside of the tank body is provided with an air pipe penetrating the tank body and extending to the inner cavity of the fixing ring;

[0012] The upper and lower ends of the outer wall of the fixing ring are both inclined structures.

[0013] As a further solution of the utility model: the rotating unit comprises a rotating ring rotatably connected to the inner cavity of the fixing ring, and one end of the rotating ring close to the fixing ring is an open structure;

[0014] The inner circumference of the rotating ring is welded to one end of the fixing frame, the bottom end of the rotating ring is connected to a cleaning pipe extending downward, and the input end of the cleaning pipe is connected to the inner cavity of the rotating ring, and a plurality of air nozzles are installed on the cleaning pipe;

[0015] The upper and lower ends of the outer wall of the rotating ring are both inclined, and the inclined surface of the rotating ring is an extension of the inclined surface of the fixed ring;

[0016] The inclined surface is wide outside and narrow inside.

[0017] As a further solution of the utility model: the driving mechanism includes a gear ring integrally formed on the outer wall of the output end of the grading impeller, the outer periphery of the gear ring is meshed with a gear, a motor is installed on the top of the tank body through a bracket, and the output end of the motor penetrates into the interior of the tank body and is connected to the gear;

[0018] The inner wall of the tank body is integrally formed with a partition below the gear, the outer wall of the output end of the grading impeller is rotatably connected to the partition, and a ceramic seal is provided at the rotatable connection, the ceramic seal includes a dynamic seal and a static seal, the static seal is installed on the inner periphery of the partition, and the dynamic seal is installed on the outer wall of the output end of the tank body.

[0019] As a further solution of the utility model: the conical outer wall of the tank body is provided with a feeding mechanism, and the bottom end of the tank body is provided with a unloading mechanism;

[0020] The feeding mechanism comprises an input pipe communicated with the inner cavity of the tank body, an input end of the input pipe is connected to an induced draft fan, and an input end of the induced draft fan is connected to a feed pipe.

[0021] As a further solution of the utility model: the feeding mechanism comprises a coarse material pipe vertically connected to the bottom end of the tank body, the bottom end of the coarse material pipe is connected to a conveying pipe, and a screw feeder is installed on the conveying pipe.

[0022] As a further solution of the utility model: a static seal is provided at the contact position between the fixed ring and the rotating ring, and a dynamic seal is provided at the contact position between the rotating ring and the static seal.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. By setting up a cleaning mechanism, when the inner wall of the tank needs to be cleaned, the air pump connected to the air pipe is started, and the gas is finally ejected from the nozzle, and the ejected gas can blow off the starch attached to the inner wall of the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 It is the internal structure entity of the tank body of the utility model;

[0027] Figure 3 For the utility model Figure 2 A partial enlarged view of the middle part;

[0028] Figure 4 This is a schematic diagram of the connection between the gas nozzle and the cleaning tube of the utility model;

[0029] Figure 5 It is a cross-sectional view of the rotating ring and the fixed ring of the utility model.

[0030] In the figure: 1. induced draft fan; 2. feed pipe; 3. input pipe; 4. tank body; 5. coarse material pipe; 6. conveying pipe; 7. screw feeder; 8. fine material pipe; 9. motor; 10. air pipe; 11. gear; 12. gear ring; 13. grading impeller; 14. air flow distribution cone; 15. fixed ring; 16. rotating ring; 17. cleaning pipe; 18. fixed frame; 19. air nozzle. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1 to Figure 5 In an embodiment of the utility model, a starch grinding and grading device comprises a tank body 4, the top of the tank body 4 is rotatably connected with a fine material pipe 8, a grading impeller 13 is installed above the inner wall of the tank body 4, an air flow distribution cone 14 is formed at the bottom end of the grading impeller 13, the output end of the grading impeller 13 is connected to the input end of the fine material pipe 8, and a driving mechanism penetrating the inner wall of the tank body 4 is installed at the top of the tank body 4, and the driving mechanism is used to drive the grading impeller 13 to rotate;

[0033] A cleaning mechanism is installed on the inner wall of the tank body 4, and the cleaning mechanism is connected to the outer wall of the air flow distribution cone 14;

[0034] The cleaning mechanism includes a fixed unit and a rotating unit, wherein the fixed unit is fixedly connected to the inner wall of the tank body 4, the rotating unit is rotatably connected to the open end of the fixed unit, and the fixed unit is connected to the airflow distribution cone 14 through a fixed frame 18;

[0035] There are multiple fixing frames 18 , and multiple classifying impellers 13 are equidistantly distributed along the circumferential direction of the airflow distribution cone 14 .

[0036] In this embodiment: by starting the driving mechanism, the driving mechanism drives the classifying impeller 13 to rotate, and the classifying impeller 13 drives the rotating unit to rotate through the fixing frame 18;

[0037] When the inner wall of the tank body 4 needs to be cleaned, the air pump connected to the fixed unit is turned on, and the air pump transports the external gas into the fixed unit. The gas passes through the fixed unit and is then ejected from the rotating unit. At this time, the rotating unit can blow air to clean the inner wall of the tank body 4 and blow off the powder attached to the inner wall of the tank body 4.

[0038] Please refer to Figure 3 and Figure 5 The fixing unit includes a fixing ring 15 welded to the inner wall of the tank body 4, and the inner periphery of the fixing ring 15 is an open structure;

[0039] The outside of the tank body 4 is provided with an air pipe 10 which penetrates the tank body 4 and extends to the inner cavity of the fixing ring 15;

[0040] The upper and lower ends of the outer wall of the fixing ring 15 are inclined structures.

[0041] In this embodiment, the air pump connected to the air pipe 10 is started, and the gas sucked by the air pump is input into the interior of the fixed ring 15 through the air pipe 10, and then the gas enters the rotating unit from the fixed ring 15.

[0042] Please refer to Figure 3 , Figure 4 and Figure 5 The rotating unit includes a rotating ring 16 rotatably connected to the inner cavity of the fixed ring 15, and one end of the rotating ring 16 close to the fixed ring 15 is an open structure;

[0043] The inner circumference of the rotating ring 16 is welded to one end of the fixed frame 18, the bottom end of the rotating ring 16 is connected to a cleaning pipe 17 extending downward, and the input end of the cleaning pipe 17 is connected to the inner cavity of the rotating ring 16, and a plurality of air nozzles 19 are installed on the cleaning pipe 17;

[0044] The upper and lower ends of the outer wall of the rotating ring 16 are both inclined structures, and the inclined surface of the rotating ring 16 is an extension of the inclined surface of the fixed ring 15;

[0045] The slope is wide outside and narrow inside.

[0046] In this embodiment, after the gas enters the rotating ring 16 from the fixed ring 15, the gas enters the cleaning pipe 17, and then is ejected from the gas nozzle 19. The ejected gas cleans the powder attached to the inner wall of the tank body 4.

[0047] Since the top and bottom ends of the rotating ring 16 and the fixed ring 15 are both inclined structures, the normal movement of the powder will not be hindered.

[0048] Please refer to Figure 3 The driving mechanism includes a gear ring 12 integrally formed on the outer wall of the output end of the grading impeller 13, and a gear 11 is meshed on the outer periphery of the gear ring 12. A motor 9 is installed on the top of the tank body 4 through a bracket, and the output end of the motor 9 penetrates into the interior of the tank body 4 and is connected to the gear 11;

[0049] The inner wall of the tank body 4 is integrally formed with a partition below the gear 11. The outer wall of the output end of the grading impeller 13 is rotatably connected to the partition, and a ceramic seal is provided at the rotating connection. The ceramic seal includes a dynamic seal and a static seal. The static seal is installed on the inner periphery of the partition, and the dynamic seal is installed on the outer wall of the output end of the tank body 4.

[0050] In this embodiment, by starting the motor 9, the motor 9 drives the gear 11 to rotate, the gear 11 drives the gear ring 12 to rotate, and the rotating gear ring 12 drives the classification impeller 13 to rotate. The centrifugal force generated by the rotation of the classification impeller 13 throws out the heavier powder (i.e., starch powder with larger particles), and the thrown powder moves down along the inner wall of the tank body 4;

[0051] The lighter powder is discharged under the suction of the fan connected to the fine material pipe 8.

[0052] Please refer to Figure 1 and Figure 2 The conical outer wall of the tank body 4 is provided with a feeding mechanism, and the bottom end of the tank body 4 is provided with a unloading mechanism;

[0053] The feeding mechanism comprises an input pipe 3 connected to the inner cavity of the tank body 4 , an input end of the input pipe 3 is connected to an induced draft fan 1 , and an input end of the induced draft fan 1 is connected to a feed pipe 2 .

[0054] In this embodiment, the starch ground into powder enters the input pipe 3 through the feed pipe 2 under the suction of the induced draft fan 1 , and then enters the tank body 4 from the input pipe 3 .

[0055] Please refer to Figure 1 and Figure 2 The feeding mechanism includes a coarse material pipe 5 vertically connected to the bottom end of the tank body 4, the bottom end of the coarse material pipe 5 is connected to a conveying pipe 6, and a screw feeder 7 is installed on the conveying pipe 6.

[0056] In this embodiment, the coarse material moving down along the inner wall of the tank body 4 falls into the conveying pipe 6 through the coarse material pipe 5, and is then pushed back into the grinding device by the rotating screw feeder 7.

[0057] Please refer to Figure 5 A static seal is provided at the contact position between the fixed ring 15 and the rotating ring 16, and a dynamic seal is provided at the contact position between the rotating ring 16 and the static seal.

[0058] In this embodiment, both the dynamic seal and the static seal are made of ceramic material, which can improve the sealing performance and avoid rapid wear between the seals, thereby extending the service life of the seals.

[0059] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A starch grinding and grading device, comprising a tank body (4), the top end of which is rotatably connected to a fine material pipe (8), characterized in that: A classifying impeller (13) is installed above the inner wall of the tank body (4), an air flow distribution cone (14) is formed at the bottom end of the classifying impeller (13), the output end of the classifying impeller (13) is connected to the input end of the fine material pipe (8), and a driving mechanism penetrating through the inner wall of the tank body (4) is installed at the top end of the tank body (4), and the driving mechanism is used to drive the classifying impeller (13) to rotate; A cleaning mechanism is installed on the inner wall of the tank body (4), and the cleaning mechanism is connected to the outer wall of the air flow distribution cone (14); The cleaning mechanism comprises a fixed unit and a rotating unit, wherein the fixed unit is fixedly connected to the inner wall of the tank body (4), the rotating unit is rotatably connected to the open end of the fixed unit, and the fixed unit is connected to the air flow distribution cone (14) via a fixed frame (18); There are multiple fixed frames (18), and multiple grading impellers (13) are equidistantly distributed along the circumferential direction of the airflow distribution cone (14).

2. A starch grinding and grading device according to claim 1, characterized in that: The fixing unit comprises a fixing ring (15) welded to the inner wall of the tank body (4), and the inner periphery of the fixing ring (15) is an open structure; The outside of the tank body (4) is provided with an air pipe (10) which penetrates the tank body (4) and extends to the inner cavity of the fixing ring (15); The upper and lower ends of the outer wall of the fixing ring (15) are both inclined structures.

3. A starch grinding and grading device according to claim 2, characterized in that: The rotating unit comprises a rotating ring (16) rotatably connected to the inner cavity of the fixing ring (15), and one end of the rotating ring (16) close to the fixing ring (15) is an open structure; The inner circumference of the rotating ring (16) is welded to one end of the fixing frame (18); the bottom end of the rotating ring (16) is connected to a cleaning pipe (17) extending downward, and the input end of the cleaning pipe (17) is connected to the inner cavity of the rotating ring (16); and a plurality of air nozzles (19) are installed on the cleaning pipe (17); The upper and lower ends of the outer wall of the rotating ring (16) are both inclined surface structures, and the inclined surface of the rotating ring (16) is an extension of the inclined surface of the fixed ring (15); The inclined surface is wide outside and narrow inside.

4. A starch grinding and grading device according to claim 3, characterized in that: The driving mechanism comprises a toothed ring (12) integrally formed on the outer wall of the output end of the classifying impeller (13), a gear (11) meshing on the outer periphery of the toothed ring (12), a motor (9) being mounted on the top of the tank body (4) via a bracket, and an output end of the motor (9) penetrating into the interior of the tank body (4) and connected to the gear (11); The inner wall of the tank body (4) is integrally formed with a partition located below the gear (11); the outer wall of the output end of the grading impeller (13) is rotatably connected to the partition, and a ceramic seal is provided at the rotatable connection. The ceramic seal includes a dynamic seal and a static seal. The static seal is installed on the inner periphery of the partition, and the dynamic seal is installed on the outer wall of the output end of the tank body (4).

5. A starch grinding and grading device according to claim 4, characterized in that: The conical outer wall of the tank body (4) is provided with a loading mechanism, and the bottom end of the tank body (4) is provided with a unloading mechanism; The feeding mechanism comprises an input pipe (3) connected to the inner cavity of the tank body (4), the input end of the input pipe (3) is connected to an induced draft fan (1), and the input end of the induced draft fan (1) is connected to a feed pipe (2).

6. A starch grinding and grading device according to claim 5, characterized in that: The material discharge mechanism comprises a coarse material pipe (5) vertically connected to the bottom end of the tank body (4); the bottom end of the coarse material pipe (5) is connected to a conveying pipe (6); and a screw conveyor (7) is installed on the conveying pipe (6).

7. A starch grinding and grading device according to claim 3, characterized in that: A static seal is provided at the contact position between the fixed ring (15) and the rotating ring (16), and a dynamic seal is provided at the contact position between the rotating ring (16) and the static seal.

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