Fully automatic bottom discharge centrifuge for wheat starch separation and separation method

Abstract

The present invention relates to the technical field of wheat deep processing, and specifically to a fully automatic bottom-discharging centrifuge for wheat starch separation, comprising: an outer shell, with a cylindrical space provided inside; a driving component fixed to the outer shell; a centrifugal cylinder, which is fixed to the driving end of the driving component and is located in the cylindrical space in the outer shell, and can be driven by the driving component to rotate relative to the outer shell. The present invention is provided with a first level device for detecting liquid materials inside the centrifugal cylinder and a second level device for detecting solid materials inside the centrifugal cylinder. The thickness of the solid and liquid materials can be detected after liquid is introduced, and the skimming device moves to a position where it can contact the surface of the solid material, and automatically scrapes off the viscous mixture on the surface of the solid material, ensuring that the solid material after skimming is a dry powder, thereby improving the quality of the product. Compared with the manual skimming in the prior art, the starch separation efficiency and the quality of the finished product can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of wheat deep processing, in particular to a full-automatic bottom-discharging centrifuge for wheat starch separation. Background Art

[0002] Starch is mainly composed of amylopectin and straight-chain starch. The ratio of straight-chain starch to amylopectin determines the structure of starch granules, which in turn affects the quality, function and application areas of starch. The straight-chain / branched ratios of wheat A- and B-type starches vary greatly, and their gelatinization properties are significantly different. A-type starch granules have a high content of straight-chain starch, while B-type starch granules have a higher gelatinization temperature and lower peak viscosity, dilution value and recovery value. It can be seen that by adjusting the ratio of starch of different granular grades in starch, an ideal combination can be reconstructed. By subdividing the granular grade of wheat starch, wheat starch can have a broader application value and improve the economic benefits of wheat.

[0003] Traditional starch production uses flour as raw material to produce 62% wheat starch and 13.5% gluten, with a comprehensive utilization rate of only 75.5%. The remaining 24.5%, except for a small part used by farmers to raise pigs, is mostly discharged with water in vain, which also creates a big problem for enterprises in sewage treatment. The separation of A- and B-type starch began with the advent of precise particle size analyzers. Although it is still in the development stage, it has applications in many fields. For example, A-type starch granules are one of the raw materials for producing carbon paper, and B-type starch granules can be used as fillers for film. Because B-type starch granules are ultra-fine, they can also be used in aerospace materials, which has high economic and technological value.

[0004] In the prior art, the dehydration and separation of wheat A and B starch is usually performed manually by skimming, and it is not easy to distinguish the thickness of the solid phase material, resulting in inaccurate separation timing and small single separation volume. The process of skimming and rehydration needs to be repeated, so the continuity and production efficiency of the starch separation operation are low.

[0005] Prior art literature:

[0006] Patent document 1: CN101418048A Wheat flour starch granule separation and purification process

[0007] Patent Document 2: CN109530098A Flat plate sedimentation centrifuge capable of automatic skimming Summary of the invention

[0008] The present invention aims to provide a fully automatic bottom-discharging centrifuge for separating wheat starch in view of the defects of the prior art, comprising:

[0009] An outer shell having a cylindrical space inside;

[0010] A driving component, fixed to the housing;

[0011] A centrifugal cylinder is fixed to the driving end of the driving component and is located in the cylindrical space in the shell, and can be driven by the driving component to rotate relative to the shell;

[0012] The rotation axis of the centrifugal cylinder is perpendicular to the ground, a gap is provided between the centrifugal cylinder and the shell to form an interlayer, and an opening is provided at the top of the centrifugal cylinder, and the diameter of the opening is smaller than the diameter of the centrifugal cylinder;

[0013] The outer shell is provided with a feed pipe extending from the opening of the centrifugal cylinder to the inside of the centrifugal cylinder, which is used to input slurry into the centrifugal cylinder, and the discharge port of the feed pipe extends radially to the inside of the opening;

[0014] The bottom of the shell is also provided with a liquid outlet communicating with the interlayer;

[0015] A discharge port is provided below the centrifugal cylinder;

[0016] Wherein, the outer shell is also provided with a first level device and a second level device extending from the centrifugal cylinder opening to the inside of the centrifugal cylinder, the first level device is used to obtain the distance of the liquid phase material in the centrifugal cylinder relative to the side wall, when the first level device reaches a preset value, the centrifugal cylinder increases from the first speed to the second speed, and the second level device is used to obtain the distance of the solid phase material in the centrifugal cylinder relative to the side wall;

[0017] It also includes a liquid replenishing tube, which is configured to continuously replenish liquid into the centrifugal cylinder when the centrifugal cylinder is at a second speed and the second material level indicator has not reached a preset value;

[0018] It also includes a washing pipe, which is configured to input washing liquid for a preset time into the centrifugal drum when the centrifugal drum is at a second speed and the second material level indicator reaches a preset value;

[0019] It also includes a skimming device, which is configured to skim the inner layer of the solid phase material in the centrifuge cylinder with a preset thickness when the centrifuge cylinder is at a second rotating speed.

[0020] Preferably, the skimming device is fixed to the outer shell, and the skimming device includes a skimming knife and a driving component. The skimming knife can be driven by the driving device to rotate relative to the outer shell, and reciprocate between a first position and a second position. In the second position, the skimming knife is close to the interface between the solid material and the liquid material detected by the second material level device. The skimming knife includes a sleeve and a scraper. The outer wall of the sleeve is provided with the scraper, and the scraper is constructed to have an inclined surface that is inclined around the outer wall of the sleeve and extends upward. The bottom end of the inclined surface has a first edge, and the top end has a second edge. The first edge is inclined upward relative to the horizontal plane, and the second edge is inclined downward relative to the horizontal plane. The side edge of the inclined surface has a third edge, and the third edge is constructed as a spiral upward curve.

[0021] Preferably, the skimming device is fixed to the shell, and the skimming device includes a skimming knife and a driving component. The skimming knife can be driven by the driving device to rotate relative to the shell, and reciprocate between a first position and a second position. In the second position, the skimming knife is close to the interface between the solid phase material and the liquid phase material detected by the second material level device; the skimming knife includes a sleeve and a scraper. The outer wall of the sleeve is provided with the scraper, and the scraper is constructed to have an inclined surface that is inclined around the outer wall of the sleeve and extends upward. The bottom end of the inclined surface has a first edge, and the top end has a second edge. The first edge is inclined upward relative to the horizontal plane, and the second edge is inclined downward relative to the horizontal plane. The side edge of the inclined surface has a third edge, and the third edge is constructed as a spiral upward curve. The sleeve and the scraper are elastically connected by a torsion spring to make the scraper rotate counterclockwise when the contact area of ​​the third edge comes into contact with the solid phase material.

[0022] Preferably, it also includes a discharging scraper for scraping off the solid phase material on the inner wall of the centrifugal cylinder when the centrifugal cylinder is at the third speed, so that the solid phase material is discharged from the discharging port and the discharging trough.

[0023] Preferably, the axis of the discharging scraper is parallel to the axis of the centrifugal cylinder.

[0024] Preferably, the discharging scraper is configured to include a first position and a second position, and can be close to the inner wall of the centrifugal cylinder in the second position.

[0025] Preferably, the discharging scraper can be driven by a driving component to move axially when in the second position to scrape off materials on the inner wall.

[0026] Preferably, the first material level device includes a first arc-shaped blade, a rotating shaft, a torsion spring and a switch component, the first arc-shaped blade is fixed to the outer wall of the rotating shaft, the rotating shaft is elastically connected to the outer shell through a torsion spring, the first arc-shaped blade is configured to be pressurized by a spring and has a tendency to move toward the inner wall of the centrifuge barrel, when the first arc-shaped blade contacts the liquid material on the inner wall of the centrifuge barrel, it is pushed to overcome the spring pressure, and can rotate as the thickness of the liquid material on the inner wall of the centrifuge barrel increases, when the first arc-shaped blade rotates a predetermined angle, the switch component is triggered.

[0027] Preferably, the second material level device includes a second arc-shaped blade, a rotating shaft, a torsion spring and a switch component, the second arc-shaped blade is fixed to the outer wall of the rotating shaft, the rotating shaft is elastically connected to the outer shell through a torsion spring, the second arc-shaped blade is configured to be pressurized by the spring and has a tendency to move toward the inner wall of the centrifuge barrel, when the second arc-shaped blade contacts the solid phase material on the inner wall of the centrifuge barrel, it is pushed to overcome the spring pressure, and can rotate as the thickness of the solid phase material on the inner wall of the centrifuge barrel increases, when the second arc-shaped blade rotates a predetermined angle, the switch component is triggered.

[0028] Preferably, the discharge port is annular, and the outer diameter of the discharge port is smaller than the diameter of the opening.

[0029] The present invention proposes another technical solution, a wheat separation method using the fully automatic bottom-discharging centrifuge in the above solution, comprising the following steps:

[0030] Step 1, feeding: controlling the centrifuge cylinder to be at a first speed, using a feeding pipe to add the mixed solution of A and B starches into the centrifuge cylinder from the bottom, and stopping the feeding when the first material level device detects that the liquid phase material reaches a predetermined thickness;

[0031] Step 2, feeding: after stopping feeding, the centrifuge cylinder increases from the first speed to the second speed, and the feeding tube is used to feed the material until the second material level device detects that the solid phase material reaches a predetermined thickness, and then the feeding is stopped;

[0032] Step 3, washing: the centrifuge cylinder is at a second speed, and a washing liquid is used to wash the surface of the solid phase material;

[0033] Step 4, skimming: moving the skimming device to contact the surface of the solid phase material, scraping off the sticky material on the surface of the solid phase material, and leaving the dry solid phase material;

[0034] Step 5: Unloading: Move the scraper until it contacts the surface of the solid material and continue to move downward to scrape off the solid material.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] The present invention is provided with a first level device for detecting the liquid material inside the centrifuge cylinder and a second level device for detecting the solid material inside the centrifuge cylinder. The thickness of the solid material and the liquid material can be detected after the liquid is filled, so that the liquid replenishment can be completed automatically, so that the solid material is continuously accumulated, and the second level device is used for real-time detection until a predetermined thickness is reached. Then the skimming device moves to a surface position where it can contact the solid material, and the viscous mixture on the surface of the solid material is automatically scraped off, ensuring that the solid material after skimming is a dry powder, improving the quality of the product, and compared with the manual skimming in the prior art, it can greatly improve the starch separation efficiency and the quality of the finished product.

[0037] The scraper in the skimming device of the present invention is arranged to elastically contact the surface of the solid phase material in a rotating manner. When rotating to gradually approach the surface of the solid phase material, the side of the scraper comes into contact with the solid phase material. By setting a reasonable contact area, the pressure of the solid phase material on the side of the scraper is greater than the torsion of the spring, while the pressure of the viscous material on the side of the scraper is less than the torsion of the spring, so that the scraper just penetrates into the viscous material layer to scrape the material, so that the scraper plays the role of automatic limiting and also plays the role of scraping and throwing out the viscous material.

[0038] It should be understood that all combinations of the aforementioned concepts and the additional concepts described in more detail below can be considered as part of the inventive subject matter of the present disclosure as long as such concepts are not mutually inconsistent. In addition, all combinations of the claimed subject matter are considered as part of the inventive subject matter of the present disclosure.

[0039] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0041] Figure 1 It is a flow chart of the fully automatic bottom-discharging centrifuge shown in the present invention;

[0042] Figure 2 It is a structural schematic diagram of the feeding process of the fully automatic bottom-discharging centrifuge shown in the present invention;

[0043] Figure 3is a schematic structural diagram of a first material level device shown in the present invention;

[0044] Figure 4 It is a structural schematic diagram of the feeding process of the fully automatic bottom-discharging centrifuge shown in the present invention;

[0045] Figure 5 is a schematic structural diagram of a second material level device shown in the present invention;

[0046] Figure 6 It is a structural schematic diagram of the washing process of the fully automatic bottom-discharging centrifuge shown in the present invention;

[0047] Figure 7 It is a structural schematic diagram of the skimming process of the fully automatic bottom-discharging centrifuge shown in the present invention;

[0048] Figure 8 It is a structural schematic diagram of the liquid skimming device shown in the present invention;

[0049] Fig. 9 It is a structural schematic diagram of the scraper shown in the present invention

[0050] Fig.10 It is a structural schematic diagram of the unloading process of the fully automatic bottom-discharging centrifuge shown in the present invention;

[0051] Fig.11 It is a top view structural schematic diagram of the fully automatic bottom discharge centrifuge shown in the present invention;

[0052] Fig.12 It is an operation curve diagram of the fully automatic bottom-discharging centrifuge shown in the present invention. DETAILED DESCRIPTION

[0053] In order to better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0054] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, in which many illustrative embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments introduced above, as well as those concepts and embodiments described in more detail below, can be implemented in many ways by any automatic bottom discharge centrifuge for wheat starch separation, because the concepts and embodiments disclosed by the present invention are not limited to any embodiment. In addition, some aspects disclosed by the present invention can be used alone, or used in any suitable combination with other aspects disclosed by the present invention.

[0055] In the prior art, centrifugal separation of starch usually involves high-speed feeding, which leads to uneven distribution of the material and produces an irregular solid-liquid material separation surface on the inner wall of the centrifuge cylinder. In addition, the thickness of the solid material cannot be detected, and the liquid is usually skimmed manually, which easily leads to uneven quality of the solid material. When unloading, sticky particles exist, and the starch is not pure, which cannot meet the requirements of high-quality and high-yield starch separation operations.

[0056] Combination Figure 2 As shown, the purpose of the present invention is to address the defects of the prior art and provide a fully automatic bottom discharge centrifuge for wheat starch separation, which mainly includes a shell 3, a driving component 1, a centrifugal cylinder 2, a feed pipe 4, a liquid replenishing pipe, a first material level device 5, a second material level device 6, a skimming device 9 and a discharge scraper 10.

[0057] Centrifuge cartridge

[0058] Combination Figure 2 As shown, a cylindrical space is provided inside the shell 3, a cover body 31 is provided on the upper part, and a driving component is provided on the bottom. The driving component 1 includes a discharge pipe and a driving motor.

[0059] The driving end of the driving motor is connected to the centrifugal drum 2 . The centrifugal drum 2 is located in a cylindrical space in the outer shell 3 and can be driven by the driving motor to rotate relative to the outer shell 3 .

[0060] Furthermore, the rotation axis of the centrifuge cylinder 2 is perpendicular to the ground, and there is a gap between the centrifuge cylinder 2 and the outer shell 3 to form a sandwich. An opening 201 is provided at the upper part of the centrifuge cylinder 2, and the diameter of the opening 201 is smaller than the diameter of the centrifuge cylinder 2. Correspondingly, a discharge port 202 is provided at the lower part of the centrifuge cylinder 2.

[0061] Furthermore, the outer shell 3 is provided with a feed pipe 4 extending from the opening 201 of the centrifuge barrel 2 to the inside of the centrifuge barrel 2, which is used to input slurry into the centrifuge barrel 2. The discharge port 41 of the feed pipe 4 extends radially to the inside of the opening 201, and the discharge port 41 is located at the bottom of the centrifuge barrel 2. In this way, the material is fed from the bottom and a medium-speed feed is adopted during feeding. The solid and liquid phase materials are not separated, and the material can be evenly spread on the side wall 21 of the centrifuge barrel 2.

[0062] Furthermore, the outer shell 3 is also provided with a first level device 5 and a second level device 6 extending from the opening 201 of the centrifuge barrel 2 to the inside of the centrifuge barrel 2. The first level device 5 is used to obtain the distance of the liquid material in the centrifuge barrel 2 relative to the side wall 21. When the first level device 5 reaches a preset value, the centrifuge barrel 2 increases from the first speed to the second speed. The second level device 6 is used to obtain the distance of the solid material in the centrifuge barrel 2 relative to the side wall 21.

[0063] Furthermore, the liquid replenishing tube 7 is configured to continuously replenish liquid into the centrifuge barrel 2 when the centrifuge barrel 2 is at the second speed and the second material level device 6 has not reached a preset value; the washing tube 8 is configured to input washing liquid for a preset time length into the centrifuge barrel 2 when the centrifuge barrel 2 is at the second speed and the second material level device 6 reaches a preset value; the skimming device 9 is configured to skim the inner layer of the solid phase material in the centrifuge barrel 2 with a preset thickness when the centrifuge barrel 2 is at the second speed.

[0064] During the feeding process, a first material level meter 5 is arranged in the centrifugal drum 2 to detect the thickness of the feeding material.

[0065] First level meter

[0066] Combination Figure 2-3 As shown, the first material level device 5 includes a first curved blade 51, a rotating shaft a52, a torsion spring and a switch component 53. The first curved blade 51 is fixed to the outer wall of the rotating shaft. The rotating shaft is elastically connected to the housing 3 through a torsion spring. The first curved blade 51 is configured to be pressed by the spring and has a tendency to move toward the inner wall 21 of the centrifugal cylinder 2. When the first curved blade 51 contacts the liquid material on the inner wall 21 of the centrifugal cylinder 2, it is pushed to overcome the spring pressure and can rotate as the thickness of the liquid material on the inner wall 21 of the centrifugal cylinder 2 increases. When the first curved blade 51 rotates a predetermined angle, the switch component is triggered.

[0067] Combination Figure 2-3 As shown, specifically, the connecting seat a54 is mounted on the cover 31 of the centrifuge; the rotating shaft a52 is rotatably connected to the connecting seat a54; the first arc-shaped blade 51 is connected to the bottom end of the rotating shaft a52; the driving component is fixed to the connecting seat a54, and can drive the rotating shaft a52 to rotate a predetermined angle, so that the first arc-shaped blade 51 is in the first position (the position where the liquid phase material is close to the inner wall 21 of the centrifugal cylinder 2) or the second position (the position within the opening 201 of the centrifugal cylinder 2);

[0068] Among them, when the liquid phase material increases from the first thickness to the second thickness, the first arc-shaped blade 51 moves from the first position to the third position (the position where the liquid phase material is close to the opening 201 of the centrifuge cylinder 2), and triggers the switch component 53 installed on the connecting seat a54, and when the liquid phase material decreases from the second thickness to the first thickness, the first arc-shaped blade 51 is rebounded to the first position by the torsion spring, wherein the third position is located between the first position and the second position.

[0069] In this way, when the first curved blade 51 contacts the liquid material, pressure is applied by the liquid material. By selecting a suitable contact surface and the torque of the spring, it can be achieved that when the thickness of the liquid material increases, the curved blade rotates a certain angle accordingly. Therefore, the thickness of the liquid material can be detected, laying the foundation for automatically detecting the thickness of the liquid material in the centrifuge barrel.

[0070] Combination Figure 3 As shown, preferably, the first arc-shaped blade 51 is provided with an arc-shaped contact plate 511, and the arc-shaped contact plate 511 has an arc-shaped contact surface in contact with the liquid phase material. The arc-shaped contact surface is configured to always remain tangent to the liquid phase material when the liquid phase material increases from the first thickness to the second thickness. In this way, the pressure applied by the liquid phase material can be kept constant or increased, and the first arc-shaped blade 51 will not be immersed in the liquid phase material.

[0071] In a preferred example, the area of ​​the arc contact surface is 2-2.4 cm 2 .

[0072] In an optional embodiment, the driving component includes a cylinder, and the driving end of the cylinder is connected to the rotating shaft a52 through a connecting rod or a gear, so as to drive the first arc-shaped blade 51 to move to the first position or the second position.

[0073] Further, the connecting seat a54 is provided with an arc groove 541, the rotating shaft a52 is provided with a limit rod connected to the arc groove 541, and one end of the limit rod is slidably connected in the arc groove 541. In an optional embodiment, the switch component includes a proximity switch, so that when the first arc blade 51 is in the third position, the proximity switch is triggered by the limit rod.

[0074] In other embodiments, the switch component may also be a sensor such as an infrared sensor or a light sensor that can sense the position state or rotation angle of the rotating shaft a52.

[0075] The second level device

[0076] Combination Figure 4 As shown, during the high-speed liquid replenishment process, the solid phase material will stick to the side wall 21 according to the centrifugal force, and the liquid phase material is located in the inner layer. When the material gradually increases, the thickness of the liquid phase material increases to the inner edge of the liquid baffle 22, and the liquid phase material is discharged into the interlayer between the centrifuge cylinder 2 and the outer shell 3 through the opening 201, and is discharged from the liquid outlet 32 ​​at the bottom. The solid phase material also becomes thicker. In order to detect the thickness of the solid phase material, a second material level device 6 is set inside the centrifuge cylinder 2.

[0077] Combination Figure 5 As shown, the second material level device 6 includes a second arc-shaped blade 61, a rotating shaft b62, a torsion spring and a switch component. The second arc-shaped blade 61 is fixed to the outer wall of the rotating shaft. The second arc-shaped blade 61 is configured to be pressed by the spring and has a tendency to move toward the inner wall 21 of the centrifugal cylinder 2. When the second arc-shaped blade 61 contacts the solid phase material on the inner wall 21 of the centrifugal cylinder 2, it is pushed to overcome the spring pressure and can rotate as the thickness of the solid phase material on the inner wall 21 of the centrifugal cylinder 2 increases. When the second arc-shaped blade 61 rotates a predetermined angle, the switch component is triggered.

[0078] In an optional embodiment, the connecting seat b64 is mounted on the cover 31 of the centrifuge; the rotating shaft b62 is rotatably connected to the connecting seat b64; the second curved blade 61 is connected to the bottom end of the rotating shaft b62; the driving component is fixed to the connecting seat b64, and can drive the rotating shaft b62 to rotate a predetermined angle so that the second curved blade 61 is in the first position or the second position.

[0079] Among them, the second arc-shaped blade 61 and the rotating shaft b62 are elastically connected by a torsion spring. When the solid phase material rises from the first thickness (the position where the solid phase material is close to the inner wall 21 of the centrifuge barrel 2) to the second thickness (the position where the solid phase material is close to the opening 201 of the centrifuge barrel 2), the arc-shaped detection piece moves from the first position (the position where the solid phase material is close to the inner wall 21 of the centrifuge barrel 2) to the third position (the position within the opening 201 of the centrifuge barrel 2), and triggers the switch component installed on the connecting seat b64, and when the solid phase material drops from the second thickness to the first thickness, the second arc-shaped blade 61 is rebounded to the first position by the torsion spring, wherein the third position is located between the first position and the second position.

[0080] In an optional embodiment, the second arc-shaped blade 61 is a curved thin plate with an arc-shaped contact surface on its outer arc surface, and the thickness of the second arc-shaped blade 61 is 2 mm.

[0081] Preferably, the arc-shaped contact surface is configured to always remain tangent to the solid-phase material when the solid-phase material increases from the first thickness to the second thickness, and form a contact area. The contact area is not fixed and may shift as the material thickness changes. In addition, the contact area cannot become smaller during the process of increasing the material.

[0082] Preferably, the contact area is 100-120 mm 2 .

[0083] In an optional embodiment, the driving component includes a cylinder, and the driving end of the cylinder is transmission-connected to the rotating shaft via a connecting rod or a gear.

[0084] Preferably, the connecting seat b64 is provided with an arc groove, the rotating shaft b62 is provided with a limit rod connected to the arc groove, and one end of the limit rod is slidably connected in the arc groove to limit the rotation angle of the rotating shaft b62 so that its rotation range is between the first position and the second position.

[0085] In an optional embodiment, the switch component includes a proximity switch, so that when the second arc-shaped blade 61 is in the third position, the proximity switch is triggered by the limit rod.

[0086] In other embodiments, the switch component may also be a sensor such as an infrared sensor or a light sensor that can sense the position state or rotation angle of the rotating shaft a52.

[0087] Skimmer

[0088] Combination Figure 7 As shown, the skimming device 9 is fixed to the outer shell 3, and the skimming device 9 includes a skimming knife and a driving component. The skimming knife can be driven by the driving device to rotate relative to the outer shell 3, and reciprocate between a first position and a second position. In the second position, the skimming knife is close to the interface between the solid phase material and the liquid phase material detected by the second material level device 6.

[0089] Specific, combined Figure 8 As shown, the mounting seat 911 is arranged on the cover 31 of the centrifuge; the rotating shaft c92 is rotatably connected to the inner wall of the mounting seat 911; the driving component 91 is arranged on the mounting seat 911 and can drive the rotating shaft c92 to rotate; the sleeve 93 is sleeved on the outer wall of the rotating shaft c92 and is located inside the centrifugal cylinder 93.

[0090] Combination Fig. 9 As shown, the outer wall of the sleeve 93 is provided with a scraper b94 (the skimmer includes the sleeve 93 and the scraper b94), and the scraper b94 is configured to have an inclined surface that is inclined around the outer wall of the sleeve 93 and extends upward, and the bottom end of the inclined surface has a first edge 941, and the top end has a second edge 942, the first edge 941 is inclined upward relative to the horizontal plane, and the second edge 942 is inclined downward relative to the horizontal plane, and the side edge of the inclined surface has a third edge 943, and the third edge 943 is configured to be a spiral upward curve. The angle between the inclined surface and the horizontal plane is 45°, and it is inclined upward.

[0091] In an optional embodiment, the driving component 9 drives the rotating shaft c92 to rotate a predetermined angle, so that the third edge 943 of the scraper b94 scrapes off a predetermined depth of material.

[0092] In an optional embodiment, the sleeve 93 and the rotating shaft c92 are elastically connected via a torsion spring 95.

[0093] So, combined Figure 7 As shown, when skimming is performed, the rotating shaft c92 is driven by the driving component 91 to rotate counterclockwise, and the sleeve 93 rotates counterclockwise accordingly. When the scraper b94 rotates to the point where it contacts the viscous material on the surface of the solid material, it continues to rotate inward until it rotates to the angle of the surface of the solid material. When the scraper b94 contacts the surface of the solid material, the third edge 943 is in contact with the solid material, which prevents the scraper b94 from continuing to intrude inward. The torsion spring 95 between the rotating shaft c92 and the sleeve 93 provides an elastic connection, and relative rotation occurs, so that the third edge 943 only touches the surface of the solid material without intruding. The inclined surface guides and scrapes the viscous material, so that the viscous material is discharged from the opening 201 on the inner edge of the liquid baffle 22.

[0094] Among them, in the radial direction, the first edge 941 is at least partially within the coverage of the liquid baffle plate 22, and the second edge 942 is outside the coverage of the liquid baffle plate 22. In this way, the inclined portion within the coverage of the liquid baffle plate 22 is the portion in contact with the viscous material in the inner layer of the solid phase material, which is intended to scrape the viscous material onto the inclined surface, while the portion where the inclined surface continues to extend guides the material. At the end of the inclined surface, it is outside the coverage of the liquid baffle plate 22. When the material slides to the end of the inclined surface, it flies upward and slides between the centrifuge barrel 2 and the outer shell 3.

[0095] Combination Figure 7 As shown, the scraper b94 is arranged on the upper part of the sleeve 93 and is located below the liquid baffle 22 of the centrifugal cylinder 2. Since the material is thrown upward during the rotation of the centrifugal cylinder 2, the material thrown upward is scraped out of the centrifugal cylinder 2 when passing through the scraper b94.

[0096] In a preferred example, the third edge 943 has a contact area with the solid phase material, and the area of ​​the contact area is 100-120m 2 .

[0097] Further, combined with Fig. 9 As shown, the first edge 941 is located counterclockwise of the second edge 942. When the sleeve 93 rotates clockwise relative to the rotating shaft c92, the torsion spring 95 provides elastic force to the sleeve 93 so that when the scraper b94 touches the solid material, it rotates clockwise and has a tendency to rebound counterclockwise.

[0098] In this way, when the third edge 943 contacts the solid material, it is subjected to a contact pressure from the solid material that is greater than the torsion of the spring. At this time, the third edge 943 is in non-rigid contact with the solid material, so the third edge 943 will not be immersed in the solid material, thereby avoiding peeling of the solid material layer.

[0099] Preferably, three scrapers b94 are arranged on the sleeve 93 at equal intervals along the axial direction, and the three scrapers b94 are all located in the upper half of the centrifugal cylinder. The three scrapers b94 can increase the skimming range and skimming efficiency.

[0100] In an optional embodiment, the driving component 91 includes a cylinder, and the driving end of the cylinder is transmission-connected to the rotating shaft c92 via a connecting rod or a gear.

[0101] Discharge scraper

[0102] After skimming, the solid phase is scraped off and combined with Figure 9-10 As shown, the unloading scraper 10 is used to scrape the solid phase material on the inner wall 21 of the centrifugal drum 2 when the centrifugal drum 2 is at the third speed, so that the solid phase material is discharged from the discharge port 202 and the outlet port 41.

[0103] The unloading scraper 10 includes a scraper a12 and a driving component 11. The scraper a12 is configured to be driven by the driving component 11 to move to a first position (not in contact with the fixed material) or a second position (close to the inner wall of the centrifuge cylinder). In the process of the scraper a12 moving from the first position to the second position, the solid phase material is scraped off.

[0104] In a preferred example, the axis of the scraper a12 is parallel to the axis of the centrifugal drum 2. When the scraper a12 is in the second position, it can be driven by the driving component 11 to move axially to scrape the material on the inner wall. In this way, the scraping surface can be kept flat.

[0105] The bottom of the centrifugal drum 2 is provided with a discharge port 202 in an annular shape, and a discharge pipe is correspondingly arranged below the discharge port in a conical shape. The scraped material is discharged from the discharge port 202 .

[0106]

Wheat separation method

[0107] Combination Figure 1 and Fig.12 The present invention proposes another technical solution, a wheat separation method using the fully automatic bottom-discharging centrifuge in the above solution, comprising the following steps:

[0108] Step 1, feeding: controlling the centrifugal drum 2 to be at a first speed, using a feeding pipe to add the mixed solution of A and B starches into the centrifugal drum from the bottom, and stopping the feeding when the first material level device detects that the liquid phase material reaches a predetermined thickness;

[0109] Step 2, feeding: after stopping feeding, the centrifuge cylinder increases from the first speed to the second speed, and the feeding tube is used to feed the material until the second material level device detects that the solid phase material reaches a predetermined thickness, and then the feeding is stopped;

[0110] Step 3, washing: the centrifuge cylinder is at a second speed, and a washing liquid is used to wash the surface of the solid phase material;

[0111] Step 4, skimming: moving the skimming device to contact the surface of the solid phase material, scraping off the sticky material on the surface of the solid phase material, and leaving the dry solid phase material;

[0112] Step 5: Unloading: Move the scraper until it contacts the surface of the solid material and continue to move downward to scrape off the solid material.

[0113] Medium speed feeding

[0114] Combination Figure 1-3As shown, the centrifugal cylinder 2 is controlled to be at a first speed (medium speed), and the mixed material is injected into the centrifugal cylinder 2 using the feed pipe 4. The first material level sensor 5 detects the gradually thickening material on the inner wall 21 of the centrifugal cylinder 2 until the liquid level reaches a preset level (at the liquid baffle 22), and then the feeding is stopped.

[0115] During this process, the discharge port 41 of the feed pipe 4 extends radially to the inside of the opening 201, and the discharge port 41 is located at the bottom of the centrifuge cylinder 2. In this way, the material is fed from the bottom and a medium speed is used during feeding. The solid and liquid phase materials are not separated, and the material can be evenly spread on the side wall 21 of the centrifuge cylinder 2.

[0116] High-speed feeding

[0117] Combination Figure 4-5 As shown, the rotation speed of the centrifuge barrel 2 is increased to the second rotation speed (high speed), and the liquid replenishing tube 7 continuously replenishes liquid into the centrifuge barrel 2 through the liquid outlet 71 when the centrifuge barrel 2 is at the second rotation speed and the second material level device 6 has not reached the preset value. The centrifuge barrel 2 is at the second rotation speed, the solid phase material and the liquid phase material begin to stratify, the solid phase material gradually thickens, and the liquid phase material is discharged from the inner edge of the liquid baffle plate 22 to between the centrifuge barrel 2 and the outer shell 3. When the solid phase material increases to the preset thickness (increased to the inner side of the liquid baffle plate 22), the liquid replenishing into the centrifuge barrel 2 is stopped.

[0118] High speed washing

[0119] Combination Figure 6 As shown, since there are still some impurities in the solid phase material, the surface of the material needs to be cleaned. The washing pipe 8 is configured to input washing liquid for a preset time into the centrifuge barrel 2 when the centrifuge barrel 2 is at the second speed and the second material level device 6 reaches a preset value, so as to clean the inner layer of the solid phase material and maintain the purity of the material.

[0120] High speed skimming

[0121] Combination Figure 7-9 As shown, when skimming is performed, the rotating shaft c92 is driven by the driving component 91 to rotate counterclockwise, and the sleeve 93 rotates counterclockwise accordingly. When the scraper b94 rotates to the point where it contacts the viscous material on the surface of the solid material, it continues to rotate inward until it rotates to an angle exceeding the surface of the solid material. When the scraper b94 contacts the surface of the solid material, the third edge 943 is in contact with the solid material, which prevents the scraper b94 from continuing to intrude inward. The torsion spring 95 between the rotating shaft c92 and the sleeve 93 provides an elastic connection, and relative rotation occurs, so that the third edge 943 only touches the surface of the solid material without intruding. The inclined surface guides and scrapes the viscous material, so that the viscous material is discharged from the opening 201 on the inner edge of the liquid baffle 22.

[0122] After skimming, the inner wall of the housing 3 is cleaned.

[0123] Low speed unloading

[0124] Combination Figure 10-11 As shown, the scraper a12 is driven by the driving component 11 to move to the first position (not in contact with the fixed material). In the process of the scraper a12 moving from the first position to the second position, the solid phase material is scraped off, and after moving to the second position (close to the inner wall of the centrifuge cylinder), it moves downward along the axis to continuously scrape the material on the inner wall until it is clean.

[0125] The next round of starch separation can then begin.

[0126] In combination with the above embodiments, the present invention is provided with a first level device for detecting the liquid material inside the centrifuge cylinder and a second level device for detecting the solid material inside the centrifuge cylinder. The thickness of the solid phase material and the liquid phase material can be detected after the liquid is filled, so that the liquid replenishment can be completed automatically, so that the solid phase material is continuously accumulated, and real-time detection is performed through the second level device until a predetermined thickness is reached. Then the skimming device moves to a surface position where it can contact the solid phase material, and the viscous mixture on the surface of the solid phase material is automatically scraped off to ensure that the solid phase material after skimming is a dry powder, thereby improving the quality of the product. Compared with the manual skimming in the prior art, it can greatly improve the starch separation efficiency and the quality of the finished product.

[0127] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A fully automatic bottom-discharging centrifuge for wheat starch separation, characterized in that: include: An outer shell having a cylindrical space inside; A driving component, fixed to the housing; A centrifugal cylinder is fixed to the driving end of the driving component and is located in the cylindrical space in the shell, and can be driven by the driving component to rotate relative to the shell; The rotation axis of the centrifugal cylinder is perpendicular to the ground, a gap is provided between the centrifugal cylinder and the shell to form an interlayer, and an opening is provided at the top of the centrifugal cylinder, and the diameter of the opening is smaller than the diameter of the centrifugal cylinder; The outer shell is provided with a feed pipe extending from the centrifugal cylinder opening to the inside of the centrifugal cylinder, which is used to input slurry into the centrifugal cylinder, and the discharge port of the feed pipe extends radially to the inside of the opening; The bottom of the shell is also provided with a liquid outlet communicating with the interlayer; A discharge port is provided below the centrifugal cylinder; Wherein, the shell is also provided with a first level device and a second level device extending from the centrifugal cylinder opening to the inside of the centrifugal cylinder, the first level device is used to obtain the distance of the liquid phase material in the centrifugal cylinder relative to the side wall, when the first level device reaches a preset value, the centrifugal cylinder increases from the first speed to the second speed, and the second level device is used to obtain the distance of the solid phase material in the centrifugal cylinder relative to the side wall; It also includes a liquid replenishing tube, which is configured to continuously replenish liquid into the centrifugal cylinder when the centrifugal cylinder is at a second speed and the second material level indicator has not reached a preset value; It also includes a washing pipe, which is configured to input washing liquid for a preset time into the centrifugal drum when the centrifugal drum is at a second speed and the second material level indicator reaches a preset value; It also includes a skimming device, which is configured to skim the inner layer of the solid phase material in the centrifugal cylinder with a preset thickness when the centrifugal cylinder is at a second speed; The skimming device is fixed to the housing, and includes a skimming knife and a driving component. The skimming knife can be driven by the driving device to rotate relative to the housing, and reciprocate between a first position and a second position. In the second position, the skimming knife is close to the interface between the solid phase material and the liquid phase material detected by the second material level device; the skimming knife includes a sleeve and a scraper. The outer wall of the sleeve is provided with the scraper, and the scraper is constructed to have an inclined surface that is inclined around the outer wall of the sleeve and extends upward, the bottom end of the inclined surface has a first edge, and the top end has a second edge, the first edge is inclined upward relative to the horizontal plane, and the second edge is inclined downward relative to the horizontal plane, and the side edge of the inclined surface has a third edge, and the third edge is constructed as a spiral upward curve.

2. The fully automatic bottom-discharging centrifuge for wheat starch separation according to claim 1, characterized in that, The sleeve and the scraper are elastically connected via a torsion spring so that the scraper rotates counterclockwise when the contact area of ​​the third edge contacts the solid phase material.

3. The fully automatic bottom-discharging centrifuge for wheat starch separation according to claim 1, characterized in that, It also includes a discharging scraper, which is used to scrape the solid phase material on the inner wall of the centrifugal cylinder when the centrifugal cylinder is at a third speed, so that the solid phase material is discharged from the discharging port.

4. The fully automatic bottom-discharging centrifuge for wheat starch separation according to claim 3, characterized in that, The axis of the discharging scraper is parallel to the axis of the centrifugal cylinder.

5. The fully automatic bottom-discharging centrifuge for wheat starch separation according to claim 3, characterized in that, The discharging scraper is configured to include a first position and a second position, and can be close to the inner wall of the centrifugal cylinder in the second position.

6. The fully automatic bottom-discharging centrifuge for separating wheat starch according to claim 5, characterized in that, When the discharging scraper is in the second position, it can be driven by the driving component to move axially to scrape off the material on the inner wall.

7. The fully automatic bottom-discharging centrifuge for separating wheat starch according to claim 1, characterized in that: The first material level device includes a first arc-shaped blade, a rotating shaft, a torsion spring and a switch component. The first arc-shaped blade is fixed to the outer wall of the rotating shaft. The first arc-shaped blade is configured to be pressed by the torsion spring and has a tendency to move toward the inner wall of the centrifugal cylinder. When the first arc-shaped blade contacts the liquid material on the inner wall of the centrifugal cylinder, it is pushed to overcome the pressure of the torsion spring and can rotate as the thickness of the liquid material on the inner wall of the centrifugal cylinder increases. When the first arc-shaped blade rotates a predetermined angle, the switch component is triggered.

8. The fully automatic bottom-discharging centrifuge for wheat starch separation according to claim 1, characterized in that: The second material level device includes a second arc-shaped blade, a rotating shaft, a torsion spring and a switch component. The second arc-shaped blade is fixed to the outer wall of the rotating shaft. The second arc-shaped blade is configured to be pressed by the torsion spring and has a tendency to move toward the inner wall of the centrifugal cylinder. When the second arc-shaped blade contacts the solid phase material on the inner wall of the centrifugal cylinder, it is pushed to overcome the pressure of the torsion spring and can rotate as the thickness of the solid phase material on the inner wall of the centrifugal cylinder increases. When the second arc-shaped blade rotates a predetermined angle, the switch component is triggered.

9. A wheat separation method using the fully automatic bottom-discharging centrifuge according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, feeding: controlling the centrifuge cylinder to be at a first speed, using a feeding pipe to add the mixed solution of A and B starches into the centrifuge cylinder from the bottom, and stopping the feeding when the first material level device detects that the liquid phase material reaches a predetermined thickness; Step 2, feeding: after stopping feeding, the centrifuge cylinder increases from the first speed to the second speed, and the feeding tube is used to feed the material until the second material level device detects that the solid phase material reaches a predetermined thickness, and then the feeding is stopped; Step 3, washing: the centrifuge cylinder is at a second speed, and a washing liquid is used to wash the surface of the solid phase material; Step 4, skimming: moving the skimming device to contact the surface of the solid phase material, scraping off the sticky material on the surface of the solid phase material, and leaving the dry solid phase material; Step 5: Unloading: Move the scraper until it contacts the surface of the solid material and continue to move downward to scrape off the solid material.

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