Vibration screening device and screening method for wheat processing

Abstract

The invention relates to the technical field of screening, in particular to a vibration screening device and a screening method for wheat processing.The vibration screening device comprises a shell of a cylindrical structure; a rotating shaft is rotationally arranged in the shell in the axis direction of the shell, an extension rod is fixedly arranged at the upper end of the rotating shaft in the radial direction of the shell, a screening disc is rotationally arranged at the end, away from the rotating shaft, of the extension rod, and the axis of the screening disc is parallel to the axis of the shell. When the screening disc rotates around the axis of the shell along with the rotating shaft, the autorotation unit drives the screening disc to rotate around the axis of the screening disc. The screening plate is prevented from being in a high-frequency vibration state all the time, the maintenance frequency is reduced, meanwhile, due to the fact that vibration screening is conducted in a screen shaking mode, the vibration frequency is effectively reduced, and noise generated by vibration is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of screening, and in particular to a vibration screening device and a screening method for wheat processing. Background Art

[0002] In the prior art, the initial sorting of wheat is usually performed by vibrating screens. On the one hand, a large amount of dust overflows, seriously affecting the construction environment; on the other hand, light impurities such as ropes, weeds, etc. mixed in the wheat are easy to clog the screen of the vibrating screen; the effect of removing impurities is not ideal, and it needs to be screened several times to be clean, and the efficiency of impurity removal is low.

[0003] Chinese patent application CN115318607A discloses a wheat screening device, comprising a base, an air selection bin, a screw feeder and a storage bin fixed in sequence from bottom to top, a screening bin is fixed on the top of the base, a material receiving port is arranged on the top of the screening bin, the air selection bin is divided into a collection chamber and a selection chamber by a vertical plate, a debris discharge port connecting the collection chamber and the selection chamber is arranged on the vertical plate, a drop port corresponding to the material receiving port is arranged at the bottom of the selection chamber, a fan is arranged in the selection chamber, a filter screen located above the debris discharge port is fixed in the collection chamber, a bag dust collector is connected to the upper end of the collection chamber, the storage bin is funnel-shaped, the bottom of the storage bin is connected to the feeding port of the screw feeder, a feeding port is arranged on the top of the storage bin, a feeding screw is vertically arranged inside the storage bin, the feeding screw is connected to a feeding motor, and the discharge port of the screw feeder is connected to the selection chamber; a recovery box is slidably connected to the lower end of the screening bin, a motor is fixedly connected to the rear end of the inner side of the screening bin, and the motor The end of the main shaft of the machine is fixedly connected with a gear, and the first screen plate is slidably connected to the upper end inside the screening bin, and the left and right ends of the first screen plate are fixedly connected to a first spring, the first spring located at the left end is slidably connected to the screening bin, and the other end of the first spring located at the right end is fixedly connected to a fixed plate, and the fixed plate is slidably connected to the screening bin, the upper and lower ends of the fixed plate are fixedly connected to a fixed rod, the left end of the outer side of the fixed rod is slidably connected to a fixed block, and the fixed block is slidably connected to the screening bin, the inner side of the fixed block is fixedly connected to a second spring, and the second spring is fixedly connected to the fixed rod, the lower end of the inner side of the screening bin is slidably connected to the second screen plate, and the left and right sides of the lower end of the second screen plate are fixedly connected to support blocks, the lower end of the outer side of the support block is slidably connected to a support plate, and the support plate is fixedly connected to the screening bin, a fourth spring is fixedly connected to the inner side of the support plate, and the other end of the fourth spring is fixedly connected to the support block.

[0004] Although the above scheme can prevent dust from overflowing during screening, when the preliminary screening mechanism screens the wheat, part of the wheat will be stuck in the screening holes of the primary screening plate, and the screening head will crush the wheat on the screening holes when rotating, thus causing unnecessary raw material loss, and the traditional method of cleaning the screen plate is not applicable to the screen plate in operation. As the running time of the screen plate increases, the screening capacity of the screen plate will gradually decrease. At the same time, the springs arranged at both ends of the screen plate will also become fatigued after long-term vibration. That is, the longer the use time, the lower the vibration frequency of the screen plate, and the vibration effect will also decrease accordingly. When the screen plate vibrates, part of the wheat will be stuck in the spring, which will hinder the expansion and contraction of the spring, and the high-frequency vibration screening noise is loud. Summary of the invention

[0005] In view of the above problems, a vibrating screening device and a screening method for wheat processing are provided. When the wheat is screened, the rotating driver drives the rotating shaft, and the rotating shaft drives the extension rod to rotate, so that the screening disk arranged at the end of the extension rod rotates around the axis of the outer shell, and when the screening disk rotates around the axis of the outer shell, the self-rotating unit arranged on the screening disk can also drive the screening disk to rotate around the axis of the screening disk itself, so that the screening disk can achieve a vibrating screening effect, that is, the wheat located on the screening disk can be simultaneously subjected to two centrifugal forces when the screening device is running, one is the centrifugal force generated when the screening disk rotates around the axis of the outer shell, and the other is the centrifugal force generated by the screening disk itself under the drive of the self-rotating unit, so that the shaking screening step in the traditional manual screening process can be imitated, so as to avoid the screening plate always being in a high-frequency vibration state, thereby reducing the maintenance frequency. At the same time, due to the use of shaking screening for vibratory screening, the vibration frequency is effectively reduced, and the noise generated by the vibration is effectively reduced.

[0006] In order to solve the problems of the prior art, the present invention provides a vibrating screening device, including an outer shell, which is a cylindrical structure; a rotating shaft is rotatably arranged in the outer shell along the axial direction of the outer shell, an extension rod is fixedly arranged on the upper end of the rotating shaft along the radial direction of the outer shell, a screening disc is rotatably arranged at the end of the extension rod away from the rotating shaft, the axis of the screening disc is parallel to the axis of the outer shell, a self-rotation unit is arranged on the screening disc, and when the screening disc rotates around the axis of the outer shell along with the rotating shaft, the self-rotation unit drives the screening disc to rotate around its own axis.

[0007] Preferably, a groove is provided on the upper portion of the screening disk, the groove is inclined toward the center of the screening disk, a feed opening is provided at the bottom of the groove along the axis of the screening disk, and the inclination angle of the groove is less than 2 degrees.

[0008] Preferably, the rotation unit includes a first gear ring fixedly mounted on the periphery of the screening disc, a second gear ring fixedly mounted on the inner wall of the outer shell, the first gear ring is located in the inner ring of the second gear ring, and the first gear ring and the second gear ring are meshed with each other.

[0009] Preferably, a quantitative feeding unit is provided on the upper part of the screening disc, and the feeding method of the feeding unit is intermittent quantitative feeding. An injection port for discharging wheat into the screening disc is provided at the lower part of the feeding unit, and the injection port is located within the vertical projection range of the screening disc and away from the axis of the screening disc.

[0010] Preferably, a follower ring is fixedly provided on the upper part of the screening disk, and first through holes are evenly opened on the follower ring. A storage bin is provided on the upper part of the follower ring, and the storage bin is used to store unscreened wheat. A second through hole is vertically penetrated through the bottom of the storage bin, and there are multiple second through holes evenly arranged around the axis of the storage bin. The storage bin rotates around the axis of the outer shell synchronously with the follower ring, and the storage bin does not rotate with the screening disk. When the first through hole coincides with the second through hole, the first through hole and the second through hole together form an injection port.

[0011] Preferably, a feed shell is fixedly installed on the top of the outer shell, the upper opening of the feed shell is larger than the lower opening of the feed shell, the axis of the feed shell is colinear with the axis of the outer shell, and when the storage bin rotates around the axis of the outer shell, the lower opening of the feed shell is always located above the storage bin, and the conical part is fixedly installed at the bottom of the storage bin along the axis of the storage bin.

[0012] Preferably, a partition unit is provided below the discharge port, and the partition unit includes an extension tube fixedly provided at the lower part of the discharge port along the extension direction of the discharge port, a guide cover is provided on the outer fixed sleeve of the rotating shaft, the extension tube penetrates the guide cover along the vertical direction, a first separation bin is provided below the guide cover, and a second separation bin is provided above the guide cover, the screened wheat enters the first separation bin through the extension tube, and the screened impurities pass through the screening plate and enter the second separation bin.

[0013] Preferably, a first fan is arranged on the side wall of the first separation bin, and the first fan is used to blow outside air into the first separation bin. A discharge port is provided at the bottom of the first separation bin, and the total outlet area of ​​the first fan is larger than the outlet area. A second fan is arranged on the side wall of the second separation bin, and the second fan is used to extract the gas in the second separation bin.

[0014] Preferably, a third fan is provided at the end of the extension rod away from the rotating shaft, and the air outlet end of the third fan is attached to the bottom of the screening disc. When the screening disc rotates, the third fan is started synchronously. The airflow generated by the third fan flows from bottom to top in the vertical direction, and the airflow flows from the lower part of the screening disc to the upper part of the screening disc.

[0015] The present invention also relates to a screening method for wheat processing, which uses a vibration screening device, and the specific steps are as follows:

[0016] S1. Drop the wheat into the screening plate from the high position of the groove. When the wheat falls on the screening plate, the landing point of the wheat is located in the vertical projection area of ​​the screening plate and away from the axis of the screening plate. The rotating shaft drives the screening plate to rotate around the axis of the outer shell through the extension rod.

[0017] S2. When the screening disc rotates around the axis of the outer shell, the rotation unit arranged on the screening disc drives the screening disc to rotate around the axis of the screening disc, and the wheat on the screening disc is screened under the dual centrifugal force generated by the revolution and rotation of the screening disc, and the impurities in the wheat are discharged from the screening holes on the screening disc, and the wheat is discharged from the small material port.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When screening wheat, the present invention puts the wheat into the upper part of the screening plate, and a feeding opening is provided on the screening plate along the axis direction of the screening plate. A groove is provided on the upper part of the screening plate, and the groove is inclined downward toward the feeding opening. Screening holes are evenly provided on the peripheral wall of the screening plate. The volume of the debris and impurities in the wheat is smaller than the volume of the wheat itself, so that the debris and impurities in the wheat are discharged through the screening holes on the screening plate, and the wheat is discharged from the feeding opening. When screening, the rotary drive is started and the rotating shaft is driven, and the rotating shaft drives the extension rod to rotate, so that the screening plate arranged at the end of the extension rod rotates around the axis of the shell, and when the screening plate rotates around the axis of the shell When the screen is moving, the self-rotating unit arranged on the screening disc can also drive the screening disc to rotate around the axis of the screening disc itself, so that the screening disc can achieve a vibrating screening effect, that is, the wheat on the screening disc can be simultaneously subjected to two centrifugal forces when the screening device is running. One is the centrifugal force generated when the screening disc rotates around the axis of the outer shell, and the other is the centrifugal force generated by the screening disc itself under the drive of the self-rotating unit. This can imitate the shaking sieve step in the traditional manual screening process, thus avoiding the screening plate from always being in a high-frequency vibration state, reducing the maintenance frequency, and at the same time, due to the use of shaking sieve for vibrating screening, the vibration frequency is effectively reduced, and the noise generated by the vibration is effectively reduced.

[0020] 2. The present invention provides an inclined groove on the upper part of the screening plate and a discharge port vertically penetrates through the bottom of the groove, so that the wheat after screening can be discharged through the discharge port.

[0021] 3. The present invention provides a separation unit so that the airflow rises vertically through the extension pipe to the screening plate, so that the dust attached to the wheat can be blown away by the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of a vibrating screening device.

[0023] Figure 2 It is a side view of a vibrating screening device.

[0024] Figure 3 A vibrating screening device Figure 2 Schematic cross-sectional view at AA in the middle.

[0025] Figure 4 The invention is a cutaway stereoscopic schematic diagram of a vibrating screening device.

[0026] Figure 5 A vibrating screening device Figure 4 A local enlarged schematic diagram of point B in the middle.

[0027] Figure 6 A vibrating screening device Figure 4 A partial enlarged schematic diagram of point C in the middle.

[0028] Figure 7 The invention is a stereoscopic schematic diagram of the assembly of a separation unit and a feeding unit of a vibrating screening device.

[0029] Figure 8 A three-dimensional diagram of the assembly of the separation unit and the feeding unit of a vibrating screening device after the outer shell is removed Figure 1 .

[0030] Fig. 9 A three-dimensional diagram of the assembly of the separation unit and the feeding unit of a vibrating screening device after the outer shell is removed Figure 2 .

[0031] Fig.10 A vibrating screening device Fig. 9 A partial enlarged schematic diagram of point D in the middle.

[0032] Fig.11 The present invention is a stereoscopic schematic diagram of the assembly of the partition unit and the feed unit of a vibrating screening device after the outer shell and the storage bin are removed.

[0033] The numbers in the figure are:

[0034] 1. Shell; 2. Screening disc; 21. Groove; 22. Feeding port; 3. Rotating shaft; 31. Extension rod; 32. Rotating drive; 4. Rotation unit; 41. First gear ring; 42. Second gear ring; 5. Feeding unit; 51. Storage bin; 511. Second through hole; 512. Feeding shell; 513. Conical member; 52. Follower ring; 521. First through hole; 53. Overlap block; 54. Annular slot; 6. Separation unit; 61. Extension tube; 62. Guide cover; 63. First separation bin; 631. Discharging port; 64. Second separation bin; 65. First fan; 66. Second fan; 67. Third fan. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figure 1-Figure 3 , Figure 6 , Figure 8 and Fig. 9 A vibrating screening device comprises a shell 1, which is a cylindrical structure; a rotating shaft 3 is rotatably arranged in the shell 1 along the axial direction of the shell 1, an extension rod 31 is fixedly arranged on the upper end of the rotating shaft 3 along the radial direction of the shell 1, a screening disc 2 is rotatably arranged at one end of the extension rod 31 away from the rotating shaft 3, the axis of the screening disc 2 is parallel to the axis of the shell 1, a self-rotation unit 4 is arranged on the screening disc 2, and when the screening disc 2 rotates around the axis of the shell 1 along with the rotating shaft 3, the self-rotation unit 4 drives the screening disc 2 to rotate around its own axis.

[0037] The traditional screening method adopts a pure vibration screening method. For example, the existing wheat screening machine uses this method, that is, the wheat is placed on the screen plate, and then the screen plate is vibrated at a high frequency to achieve wheat screening. However, due to the high frequency of the vibration, the service life of the vibration component is limited. The present invention can solve the above problem by setting a rotating shaft 3 and a screening disc 2. A rotating driver 32 for driving the rotating shaft 3 to rotate is provided at the bottom of the rotating shaft 3. The rotating driver 32 is preferably a servo motor. The specific working principle is as follows: the wheat is put into the upper part of the screening disc 2. A discharge port 22 is provided on the screening disc 2 along the axial direction of the screening disc 2. A groove 21 is provided on the upper part of the screening disc 2. The groove 21 is inclined downward toward the discharge port 22, and screening holes are evenly provided on the peripheral wall of the screening disc 2. The volume of debris impurities in the wheat is smaller than the volume of the wheat itself. In this way, the debris impurities in the wheat are discharged through the screening holes on the screening disc 2, and the wheat is discharged from the discharge port 22 When screening, the rotary driver 32 is started and drives the rotating shaft 3, and the rotating shaft 3 drives the extension rod 31 to rotate, so that the screening disc 2 arranged at the end of the extension rod 31 rotates around the axis of the shell 1, and when the screening disc 2 rotates around the axis of the shell 1, the self-rotating unit 4 arranged on the screening disc 2 can also drive the screening disc 2 to rotate around the axis of the screening disc 2 itself, so that the screening disc 2 can achieve a vibration screening effect, that is, the wheat on the screening disc 2 can be simultaneously subjected to two centrifugal forces when the screening device is running, one is the centrifugal force generated when the screening disc 2 rotates around the axis of the shell 1, and the other is the centrifugal force generated by the screening disc 2 itself under the drive of the self-rotating unit 4, so that the shaking sieve step in the traditional manual screening process can be imitated, so as to avoid the screening plate always being in a high-frequency vibration state, and reduce the maintenance frequency. At the same time, due to the use of shaking sieve for vibration screening, the vibration frequency is effectively reduced, and the noise generated by vibration is effectively reduced.

[0038] Reference Fig.11 A groove 21 is provided at the upper portion of the screening disc 2, and the groove 21 is inclined toward the center of the screening disc 2. A discharge port 22 is provided at the bottom of the groove 21 along the axis of the screening disc 2, and the inclination angle of the groove 21 is less than 2 degrees.

[0039] When the wheat is put into the upper part of the screening plate 2, the screening plate 2 rotates around the axis of the outer shell 1 under the drive of the rotating shaft 3. The screening plate 2 screens the wheat by a shaking screen vibration screening method. Since the groove 21 has an inclination, the wheat falling on the screening plate 2 will roll as the screening plate 2 shakes. The inclined groove 21 can guide the wheat in a shaking state, so that the shaking wheat can smoothly roll into the discharge port 22. It is worth noting that the inclination of the groove 21 needs to be strictly controlled, that is, the inclination of the groove 21 should not be too large. If the inclination of the groove 21 is too large, the time that the wheat falling on the screening plate 2 can stay is shortened, which results in a very short screening time for the wheat on the screening plate 2, which in turn affects the screening effect of the wheat. Therefore, it is recommended that the inclination of the groove 21 is less than 2 degrees, and the specific inclination needs to be set by the staff according to the actual production conditions.

[0040] Reference Figure 3 , Figure 8 and Fig.11 The rotation unit 4 includes a first toothed ring 41 fixedly mounted on the periphery of the screening disc 2, a second toothed ring 42 fixedly mounted on the inner wall of the outer shell 1, the first toothed ring 41 is located in the inner ring of the second toothed ring 42, and the first toothed ring 41 and the second toothed ring 42 are meshed with each other.

[0041] When the rotary driver 32 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the extension rod 31 to rotate around the axis of the outer shell 1, so that the screening disc 2 rotates around the axis of the outer shell 1 driven by the extension rod 31. Since the outer periphery of the screening disc 2 is fixedly sleeved with a first gear ring 41, and the inner wall of the outer shell 1 is fixedly provided with a second gear ring 42, and the first gear ring 41 is located inside the second gear ring 42, the first gear ring 41 and the second gear ring 42 are meshed with each other, when the screening disc 2 rotates around the axis of the outer shell 1, the first gear ring 41 rotates on the inner ring side of the second gear ring 42, so that the screening disc 2 fixedly connected to the first gear ring 41 can rotate around the axis of the screening disc 2 itself, so that the screening disc 2 can achieve a self-rotation effect.

[0042] Reference Figure 1 , Figure 2 and Figure 5 : A quantitative feeding unit 5 is arranged on the upper part of the screening disc 2, and the feeding method of the feeding unit 5 is intermittent quantitative feeding. An injection port for discharging wheat into the screening disc 2 is arranged on the lower part of the feeding unit 5, and the injection port is located within the vertical projection range of the screening disc 2 and away from the axis of the screening disc 2.

[0043] Reference Figure 3 , Figure 5 , Fig. 9 and Fig.10A follower ring 52 is fixedly provided on the upper part of the screening disk 2, and first through holes 521 are evenly opened on the follower ring 52. A storage bin 51 is provided on the upper part of the follower ring 52. The storage bin 51 is used to store unscreened wheat. A second through hole 511 is vertically penetrated through the bottom of the storage bin 51. There are multiple second through holes 511 and they are evenly arranged around the axis of the storage bin 51. The storage bin 51 rotates synchronously with the follower ring 52 around the axis of the outer shell 1, and the storage bin 51 does not rotate with the screening disk 2. When the first through hole 521 coincides with the second through hole 511, the first through hole 521 and the second through hole 511 jointly form an injection port.

[0044] The material storage bin 51 can only rotate around the axis of the shell 1, and the material storage bin 51 cannot rotate with the screening disc 2. When the screening disc 2 rotates, the material storage bin 51 and the follower ring 52 fixed on the upper part of the screening disc 2 rotate relative to each other. It is worth noting that the shape and size of the first through hole 521 and the shape and size of the second through hole 511 are the same, and the number of the first through hole 521 and the second through hole 511 does not need to correspond one to one. It is only necessary that the first through hole 521 can coincide with the second through hole 511 when the follower ring 52 and the material storage bin 51 rotate relative to each other. As the follower ring 52 and the screening disc 2 rotate synchronously, the follower ring 52 and the material storage bin 51 rotate relative to each other. In this way, when the bottom of the material storage bin 51 When the second through hole 511 of the upper part intersects and overlaps with the first through hole 521 on the follower ring 52, the injection port is formed. When the first through hole 521 and the second through hole 511 gradually disengage from the intersection, the injection port disappears. At this time, the wheat cannot fall into the screening plate 2. Through the above arrangement, the first through hole 521 and the second through hole 511 can switch back and forth between intersection and separation, thereby controlling the amount of wheat falling into the screening plate 2. In this way, when the feeding unit 5 puts wheat into the screening plate 2, the way of putting wheat into the screening plate 2 is intermittent quantitative feeding, which ensures the screening effect of the screening plate 2 on the wheat, and avoids the situation that the screening plate 2 cannot screen the wheat in time after a large amount of wheat falls into the screening plate 2, resulting in poor screening effect. An annular groove 54 is provided on the side wall of the shell 1, and the axis of the annular groove 54 is colinear with the axis of the shell 1. The lap block 53 is fixedly arranged on the side wall of the storage bin 51, and the lap block 53 is slidably arranged in the annular groove 54. By fixing the overlapping block 53 on the side of the storage bin 51 and making the overlapping block 53 slide in cooperation with the annular groove 54, when the screening disc 2 rotates around the axis of the outer shell 1, the overlapping block 53 arranged on the screening disc 2 slides in the annular groove 54, and the overlapping block 53 restricts the storage bin 51 from rotating around the axis of the screening disc 2, so that the follower ring 52 arranged on the screening disc 2 can rotate relative to the storage bin 51.

[0045] Reference Figure 3: A feed shell 512 is fixedly arranged on the top of the outer shell 1, the upper opening of the feed shell 512 is larger than the lower opening of the feed shell 512, the axis of the feed shell 512 is colinear with the axis of the outer shell 1, when the storage bin 51 rotates around the axis of the outer shell 1, the lower opening of the feed shell 512 is always located above the storage bin 51, and the conical member 513 is fixedly arranged at the bottom of the storage bin 51 along the axis of the storage bin 51.

[0046] When the storage bin 51 rotates around the axis of the outer shell 1, the lower opening of the feed shell 512 is always located above the storage bin 51, that is, after the wheat is put into the feed shell 512, it can fall into the storage bin 51 in a rotating state, and the cone 513 arranged at the bottom of the storage bin 51 can ensure that the wheat falling from the feed shell 512 can be smoothly guided by the cone 513 to the second through hole 511 of the storage bin 51. If the cone 513 is not arranged at the bottom of the storage bin 51, when the wheat falls into the storage bin 51 from the feed shell 512, the wheat will accumulate at the bottom of the storage bin 51, which will cause some of the wheat to be unable to be discharged through the second through hole 511 of the storage bin 51. Long-term accumulation in the storage bin 51 will easily cause the accumulated wheat to become moldy, and will also cause pollution to the subsequently added wheat. After the cone 513 is arranged at the bottom of the storage bin 51, the above situation can be avoided.

[0047] Reference Figure 2-Figure 4 A partition unit 6 is provided below the feed port 22, and the partition unit 6 includes an extension tube 61 fixedly provided at the lower part of the feed port 22 along the extension direction of the feed port 22, and a guide cover 62 is fixedly sleeved on the outer periphery of the rotating shaft 3. The extension tube 61 penetrates the guide cover 62 along the vertical direction, and a first separation bin 63 is provided below the guide cover 62, and a second separation bin 64 is provided above the guide cover 62. The screened wheat enters the first separation bin 63 through the extension tube 61, and the screened impurities pass through the screening disc 2 and enter the second separation bin 64.

[0048] The extension tube 61 and the guide cover 62 are rotatably matched, and the wheat screened on the screening disc 2 enters the extension tube 61 from the discharge port 22 and falls into the first separation bin 63 under the guidance of the extension tube 61, while the impurities screened by the screening disc 2 fall into the second separation bin 64 and are received by the guide cover 62. A discharge port is provided on the side wall of the second separation bin 64, and the impurities can be discharged through the discharge port on the second separation bin 64. A discharge port 631 is provided at the bottom of the first separation bin 63, and the wheat falling into the first separation bin 63 is discharged from the discharge port 631.

[0049] Reference Figure 7-Figure 9: A first fan 65 is arranged on the side wall of the first separation bin 63, and the first fan 65 is used to blow external air into the first separation bin 63. A discharge port 631 is opened at the bottom of the first separation bin 63. The total area of ​​the air outlet of the first fan 65 is larger than the area of ​​the discharge port 631. A second fan 66 is arranged on the side wall of the second separation bin 64, and the second fan 66 is used to extract the gas in the second separation bin 64.

[0050] A plurality of first fans 65 are arranged on the side wall of the first separation bin 63. It is only necessary to make the sum of the outlet areas of the plurality of first fans 65 larger than the area of ​​the discharge port 631 on the first separation bin 63. That is, when the outside air is blown into the first separation bin 63 by the first fans 65, the airflow entering the first separation bin 63 can rise along the extension pipe 61 to the upper part of the screening disc 2. Since the storage bin 51 is covered on the upper part of the screening disc 2, a screening cavity is formed on the upper part of the screening disc 2 provided with the groove 21. At this time, the rising air in the first separation bin 63 can enter the screening cavity through the extension pipe 61 and pass through the screening hole of the screening disc 2 to enter the second separation bin 64. Moreover, since the discharge port 631 at the bottom of the first separation bin 63 has an overflow effect, the flow rate of the airflow rising from the first separation bin 63 will not be very large, thereby achieving the removal of dust in the wheat and avoiding blowing the wheat up.

[0051] Reference Figure 5 A third fan 67 is provided at the end of the extension rod 31 away from the rotating shaft 3, and the air outlet end of the third fan 67 is attached to the bottom of the screening disc 2. When the screening disc 2 rotates, the third fan 67 is started synchronously.

[0052] When the rotating shaft 3 rotates, the third fan 67 starts. When the rotating shaft 3 drives the screening disc 2 to rotate around the axis of the outer shell 1 through the extension rod 31, the screening disc 2 rotates under the action of the rotation unit 4. At this time, the third fan 67 can clean the screening holes on the screening disc 2, so that the screening holes on the screening disc 2 will not be blocked during screening, that is, after a long period of operation, the screening effect of the screening disc 2 remains unchanged.

[0053] Reference Figure 1-Figure 11 The present invention also relates to a screening method for wheat processing, which uses a vibration screening device, and the specific steps are as follows:

[0054] S1. Drop wheat into the screening plate 2 from the high position of the groove 21. When the wheat falls on the screening plate 2, the landing point of the wheat is located in the vertical projection area of ​​the screening plate 2 and away from the axis of the screening plate 2. The rotating shaft 3 drives the screening plate 2 to rotate around the axis of the outer shell 1 through the extension rod 31.

[0055] S2. When the screening disc 2 rotates around the axis of the outer shell 1, the rotation unit 4 arranged on the screening disc 2 drives the screening disc 2 to rotate around the axis of the screening disc 2. The wheat on the screening disc 2 is screened under the dual centrifugal force generated by the revolution and rotation of the screening disc 2. The impurities in the wheat are discharged from the screening holes on the screening disc 2, and the wheat is discharged from the small material port.

[0056] The revolution of the screening disc 2 refers to the rotation of the screening disc 2 around the axis of the outer shell 1, and the rotation of the screening disc 2 refers to the rotation of the screening disc 2 around the axis of the screening disc 2. The screening disc 2 provided with the feeding unit 5 and the rotation unit 4 becomes a screening unit. In the outer shell 1, the staff can vertically arrange multiple screening units along the axial direction of the outer shell 1 according to actual needs, thereby improving the screening effect.

[0057] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A vibrating screening device, comprising a housing (1), the housing (1) being a cylindrical structure; It is characterized in that A rotating shaft (3) is rotatably arranged in the housing (1) along the axis direction of the housing (1); an extension rod (31) is fixedly arranged at the upper end of the rotating shaft (3) along the radial direction of the housing (1); a screening disc (2) is rotatably arranged at one end of the extension rod (31) away from the rotating shaft (3); the axis of the screening disc (2) is parallel to the axis of the housing (1); a self-rotating unit (4) is arranged on the screening disc (2); when the screening disc (2) rotates around the axis of the housing (1) along with the rotating shaft (3), the self-rotating unit (4) drives the screening disc (2) to rotate around its own axis; when the screening disc (2) rotates around the housing (1), the wheat on the screening disc (2) is subjected to two centrifugal forces, one of which is the centrifugal force generated when the screening disc (2) rotates around the axis of the housing (1); and the other is the centrifugal force generated by the screening disc (2) itself under the drive of the self-rotating unit (4).

2. A vibrating screening device according to claim 1, characterized in that: A groove (21) is provided on the upper part of the screening disc (2), the groove (21) is sunken and inclined toward the center of the screening disc (2), a feed opening (22) is provided at the bottom of the groove (21) along the axis of the screening disc (2), and the inclination angle of the groove (21) is less than 2 degrees.

3. A vibrating screening device according to claim 1, characterized in that: The rotation unit (4) comprises a first toothed ring (41) fixedly sleeved on the periphery of the screening disc (2), a second toothed ring (42) fixedly arranged on the inner wall of the outer shell (1), the first toothed ring (41) being located in the inner ring of the second toothed ring (42), and the first toothed ring (41) and the second toothed ring (42) being meshed with each other.

4. A vibrating screening device according to claim 1, characterized in that: A quantitative feeding unit (5) is arranged on the upper part of the screening disc (2). The feeding method of the feeding unit (5) is intermittent quantitative feeding. An injection port for discharging wheat into the screening disc (2) is arranged on the lower part of the feeding unit (5). The injection port is located within the vertical projection range of the screening disc (2) and away from the axis of the screening disc (2). The injection port is intermittently opened to put a quantitative amount of wheat into the screening disc (2).

5. A vibrating screening device according to claim 4, characterized in that: A follower ring (52) is fixedly arranged on the upper part of the screening disc (2), and first through holes (521) are evenly arranged on the follower ring (52). A storage bin (51) is arranged on the upper part of the follower ring (52), and the storage bin (51) is used to store unscreened wheat. A second through hole (511) is vertically penetrated through the bottom of the storage bin (51), and a plurality of second through holes (511) are evenly arranged around the axis of the storage bin (51). The storage bin (51) follows the The follower ring (52) rotates synchronously around the axis of the housing (1), and the material storage bin (51) does not rotate along with the screening disc (2). When the screening disc (2) rotates, the follower ring (52) and the material storage bin (51) rotate relative to each other, and a first through hole (521) provided on the follower ring (52) overlaps with a second through hole (511) provided on the material storage bin (51). The first through hole (521) and the second through hole (511) completely overlap to form an injection port.

6. A vibrating screening device according to claim 5, characterized in that: A feed shell (512) is fixedly arranged on the top of the outer shell (1); the upper opening of the feed shell (512) is larger than the lower opening of the feed shell (512); the axis of the feed shell (512) is colinear with the axis of the outer shell (1); when the storage bin (51) rotates around the axis of the outer shell (1), the lower opening of the feed shell (512) is always located above the storage bin (51); and a conical member (513) is fixedly arranged at the bottom of the storage bin (51) along the axis of the storage bin (51); the cone tip of the conical member (513) is vertically facing upward.

7. A vibrating screening device according to claim 2, characterized in that: A separation unit (6) is provided below the feed opening (22), and the separation unit (6) comprises an extension tube (61) fixedly provided at the lower part of the feed opening (22) along the extension direction of the feed opening (22); a guide cover (62) is fixedly sleeved on the periphery of the rotating shaft (3); the extension tube (61) passes through the guide cover (62) in a vertical direction; a first separation bin (63) is provided below the guide cover (62); a second separation bin (64) is provided above the guide cover (62); the screened wheat enters the first separation bin (63) through the extension tube (61), and the screened impurities enter the second separation bin (64) through the screening disc (2).

8. A vibrating screening device according to claim 7, characterized in that: A first fan (65) is arranged on the side wall of the first separation bin (63), and the first fan (65) is used to blow outside air into the first separation bin (63). A discharge port (631) is provided at the bottom of the first separation bin (63), and the total area of ​​the air outlet of the first fan (65) is larger than the area of ​​the discharge port (631). A second fan (66) is arranged on the side wall of the second separation bin (64), and the second fan (66) is used to extract the gas in the second separation bin (64). After the outside air enters the first separation bin (63), it passes through the extension pipe (61) in the vertical direction and enters the top of the sieving disc (2), and then passes through the sieving disc (2) and enters the second separation bin (64) to be discharged.

9. A vibrating screening device according to claim 1, characterized in that: A third fan (67) is provided at the end of the extension rod (31) away from the rotating shaft (3), and the air outlet end of the third fan (67) is attached to the bottom of the screening disc (2). When the screening disc (2) rotates, the third fan (67) is started synchronously, and the airflow generated by the third fan (67) flows from bottom to top in the vertical direction, and the airflow flows from the lower part of the screening disc (2) to the upper part of the screening disc (2).

10. A screening method for wheat processing, using a vibrating screening device according to any one of claims 2 to 9, characterized in that: The specific steps are as follows: S1. Wheat is dropped into the screening plate (2) from a high position of the groove (21). When the wheat falls on the screening plate (2), the landing point of the wheat is located within the vertical projection area of ​​the screening plate (2) and away from the axis of the screening plate (2). The rotating shaft (3) drives the screening plate (2) to rotate around the axis of the housing (1) through the extension rod (31); S2. When the screening disc (2) rotates around the axis of the housing (1), the rotation unit (4) arranged on the screening disc (2) drives the screening disc (2) to rotate around the axis of the screening disc (2), and the wheat on the screening disc (2) is screened under the dual centrifugal force generated by the revolution and rotation of the screening disc (2), and the impurities in the wheat are discharged from the screening holes on the screening disc (2), and the wheat is discharged from the small material outlet.

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