A multi-stage grain sorting device

Abstract

A kind of grain multistage sorting device belongs to sorting device technical field, including: shell, carousel, hopper and negative pressure pipe.Shell top is equipped with hopper, bottom is equipped with discharge pipe;Carousel top coaxially is equipped with rotating shaft, and the lower end of rotating shaft is circumferentially interval and equipped with multiple straight plates, and the top surface of carousel has annular groove, and the edge of annular groove is upturned, and multiple slapping plates are circumferentially arrayed in annular groove, and slapping plate is perpendicular to the bottom surface of carousel, and rotating shaft is driven by motor;Hopper is arranged in shell interior, and coaxially is arranged below carousel, and the bottom of hopper is equipped with drop tube, and drop tube passes through shell downwards, and the inner wall of upper end of hopper is inverted conical surface, and conical surface is interval arranged between the outer wall of carousel, and the outer edge of upper end of hopper and the inner wall of shell are interval arranged;Negative pressure pipe is circular ring structure, and it is interval arranged above hopper.This scheme can effectively prevent dust, has better sorting effect and efficiency, and structure is more compact.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sorting devices, and particularly relates to a multi-stage grain sorting device. BACKGROUND

[0002] In the process of making various types of grain biscuits, such as making five-grain biscuits, sesame biscuits and the like, various types of grain raw materials need to be sorted, and the grain with full particles is selected as the biscuit raw material, and the dry or hollow part is used for other purposes. The current sorting method mainly uses air sorting equipment to realize, and the working principle of the existing sorting equipment is that the grain is automatically discharged downward from the bottom of the hopper, and then horizontal wind is blown to the grain, the grain with full particles is closer to the blowing port due to its greater weight, and the dry and hollow grain is blown farther due to its lighter weight, so that the grain can be sorted. However, such sorting device will generate a lot of dust during work, and the grain will easily accumulate when the conventional hopper is fed, which reduces the sorting effect, causes part of the dry and hollow grain to mix with the full particles, and affects the quality of the biscuits. Although some equipment uses a screw pushing rod structure to continuously push the material, the feeding is more uniform, but the feeding part is still concentrated, which is not conducive to the dispersion of the material, and thus the improvement of the sorting effect is generally not helpful. On the other hand, the overall structure of such equipment is arranged in the horizontal direction, and the overall size is large. SUMMARY

[0003] To solve the problems in the prior art, the present application provides a multi-stage grain sorting device which can effectively prevent dust raising, has better sorting effect and efficiency, and has a more compact structure.

[0004] In order to achieve the purpose of the present application, the following scheme is adopted:

[0005] A multi-stage grain sorting device, comprising: a housing, a rotating disc, a hopper and a negative pressure pipe.

[0006] The housing is provided with a hopper at the top and a discharge pipe at the bottom;

[0007] The rotating disc is coaxially provided with a rotating shaft at the top, and the rotating disc is horizontally arranged in the housing. The upper end of the rotating shaft penetrates the connecting part of the hopper and the housing upwardly. The lower end of the rotating shaft is provided with a plurality of straight plates at intervals along the circumference. The straight plates are located at the junction of the housing and the hopper. The top surface of the rotating disc has an annular groove, and the edge of the annular groove is upwardly curved. A plurality of beating plates are arranged in an array along the circumference in the annular groove. The beating plates are perpendicular to the bottom surface of the rotating disc. The rotating shaft is driven by a motor.

[0008] The hopper is arranged inside the housing and coaxially below the rotating disc. The bottom of the hopper is provided with a discharging pipe which penetrates the housing downwardly. The inner wall of the upper end of the hopper is in the shape of an inverted conical surface. The conical surface and the outer wall of the rotating disc are arranged at intervals. The outer edge of the upper end of the hopper and the inner wall of the housing are arranged at intervals.

[0009] The negative pressure pipe has a circular structure and is spaced above the funnel. The negative pressure pipe is connected to the air extraction equipment, and a suction hole is opened on its bottom surface. A bag filter is installed between the negative pressure equipment and the negative pressure pipe.

[0010] The beneficial effects of this invention are as follows:

[0011] 1. Compared with traditional air separation methods, this solution can effectively reduce dust, has a smaller volume and footprint, and has better sealing to effectively prevent dust from overflowing.

[0012] 2. The feeding method of this scheme can make the grains more dispersed, and during the sorting process, the rotation of the turntable can further disperse the grains, thereby improving the sorting effect and efficiency. Attached Figure Description

[0013] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0014] Figure 1 A schematic diagram of the internal structure of this application is shown.

[0015] Figure 2 A schematic diagram of a preferred structure for the turntable and the rotating shaft is shown.

[0016] Figure 3 An overall sectional view of this application is shown.

[0017] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0018] The markings in the diagram are: shell-1, hopper-11, discharge pipe-12, telescopic device-13, buffer bin-14, conical cover-15, turntable-2, annular groove-201, rotating shaft-21, straight plate-22, striking plate-23, blade-24, funnel-3, discharge pipe-31, and negative pressure pipe-4. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0020] like Figures 1 to 4 As shown, a multi-stage grain sorting device includes: a shell 1, a turntable 2, a funnel 3, and a negative pressure pipe 4.

[0021] Specifically, such as Figure 1 , Figure 3As shown in the drawings, the top of the shell 1 is provided with a hopper 11, and the bottom is provided with a discharge pipe 12.

[0022] Specifically, as shown in the drawings, Figures 1 to 3 As shown in the drawings, the top of the shell 1 is provided with a hopper 11, and the bottom is provided with a discharge pipe 12.

[0023] Specifically, as shown in the drawings, Figure 1 、 Figure 3 As shown in the drawings, the top of the shell 1 is provided with a hopper 11, and the bottom is provided with a discharge pipe 12.

[0024] Specifically, as shown in the drawings, Figure 1 、 Figure 3 As shown in the drawings, the top of the shell 1 is provided with a hopper 11, and the bottom is provided with a discharge pipe 12.

[0025] When sorting grains, the grains are directly put into the hopper 11, and the grains in the hopper 11 will first enter the interval between the adjacent straight plates 22 before entering the shell 1, so that the grains are evenly fed along the circumference of the rotating shaft 21, and the grains are evenly dropped into the annular groove 201, and after the grains drop in the annular groove 201, the grains will be thrown along the tangent direction of the edge of the annular groove 201 under the rotation of the rotating disc 2 and the impact of the beating plate 23, and the grains will be further evenly distributed along the circumference of the rotating disc 2 in the process of being thrown, and among the thrown grains, the grains with full particles will be thrown farther because of their heavier weight and greater inertia, so that the grains with full particles can pass over the upper edge of the funnel 3 and enter the interval between the upper end outer edge of the funnel 3 and the inner wall of the shell 1 and gather in the shell 1, and finally be discharged from the discharge pipe 12; at the same time, the hollow and shriveled grains will be blocked by the funnel 3 because of their slightly lighter weight and cannot pass over the funnel 3, and will fall from the interval between the rotating disc 2 and the inner wall of the funnel 3 and gather in the funnel 3, and finally be discharged from the discharge pipe 31; the leaf fragments, empty shells and dust with lighter weight will be sucked into the negative pressure pipe 4 and finally be collected and discharged by the bag dust removal equipment.

[0026] Compared with the traditional air separation method, the present scheme can effectively reduce dust raising, and the whole scheme is arranged in a longitudinally arranged shell 1, has a smaller volume and occupies a smaller area, and has better sealing property and can effectively prevent dust overflow; the feeding method of the present scheme can make the grains more dispersed, and in the sorting process, the rotation of the rotating disc 2 can make the grains further dispersed, so that the concentration of the grains in the sorting process can be effectively avoided to affect the sorting effect.

[0027] Preferably, the vertical position of the funnel 3 is adjustable, for adjusting the relative position in the vertical direction between the tangent extension line at the edge of the annular groove 201 and the conical surface. When the tangent extension line at the edge of the annular groove 201 is higher than the upper edge of the conical surface, the grains with full particles and reaching a predetermined weight among the grains thrown by the rotating disc 2 will be directly thrown to the outside of the funnel 3 and discharged through the discharge pipe 12, and the grains with lighter weight, such as hollow or shriveled grains, will enter the funnel 3 and be discharged from the discharge pipe 31, Figure 4 The dashed line represents the tangent extension line at the edge of the annular groove 201. As Figure 4As shown, when the tangent extension line of the edge of the annular groove 201 coincides with the conical surface in the vertical direction, the slightly heavier grains in the thrown grains will collide with the conical surface of the funnel 3. The heavier grains can still continue to rush to the outside of the funnel 3 under the action of inertia after the impact, and enter the space between the funnel 3 and the shell 1. The part of the grains not only has full particles, but also has large particle size, and belongs to the best grade of grains. Part of the grains cannot pass through the funnel 3 due to small inertia after the impact, and thus leaks into the funnel 3 along the conical surface of the funnel 3. The part of the grains includes not only empty and shriveled grains, but also part of the grains with full particles but small particle size. In this way, the best selected grains can be obtained.

[0028] Preferably, the bottom of the shell 1 is provided with a telescopic device 13 for driving the funnel 3 to move in the vertical direction. The telescopic device is a gas cylinder, a hydraulic cylinder or a screw rod transmission structure.

[0029] Preferably, as shown in Figure 4 the tangent extension line of the edge of the annular groove 201 coincides with the conical surface in the vertical direction, and the included angle between the conical surface of the funnel 3 and the rotating shaft 21 is smaller than the included angle between the tangent line of the edge of the annular groove 201 and the rotating shaft 21, and the difference between the angles is 2°-6°. Thus, the grains and the conical surface collide more effectively, avoiding that part of the unqualified grains pass through the funnel 3 due to the too small included angle between the conical surface and the tangent line of the edge of the annular groove 201, and preventing that the selected qualified products are too few due to the too large difference between the angles, causing waste of raw materials. Because the larger the difference between the angles is, the steeper the conical surface is, which increases the difficulty of the grains passing through the funnel 3, thereby reducing the passing rate of the qualified products. On the contrary, if the difference between the angles is smaller, the conical surface is flatter, which will lead to that part of the unqualified grains pass through the selection, affecting the final quality of the products.

[0030] Preferably, as shown in Figure 1 , Figure 3 the part where the shell 1 communicates with the hopper 11 is provided with a buffer bin 14, the upper end of the straight plate 22 extends into the buffer bin 14, and the lower end of the straight plate 22 extends downward into the shell 1. This structure can make the grains fill the buffer bin 14 first, and the space between the straight plates 22 is always full of grains, so as to ensure the continuity of the grain feeding and the uniformity of the circumferential distribution of the grains along the rotating shaft 21, thereby improving the selection efficiency and the selection effect of the grains.

[0031] Preferably, as shown in Figure 1 , Figure 3As shown, the bottom of the top plate of the shell 1 is provided with a conical cover 15, which is coaxially sleeved outside the rotating shaft 21, the large end of the conical cover 15 faces downward, and there is a gap between the bottom of the conical cover 15 and the top surface of the rotating disc 2 for passing through the grains, which will uniformly fall along the circumference of the conical cover 15 under the action of the straight plate 22, and the grains falling from the conical cover 15 can be thrown outward along the annular groove 201 by setting the conical cover 15, so as to prevent the grains from being thrown out under the action of the straight plate 22 without passing through the annular groove 201, and the corresponding sorting effect is achieved.

[0032] Further preferably, as shown in Figure 1 , Figure 3 , the beating plate 23 has a gap with the rotating shaft 21, the lower end of the conical cover 15 is located between the beating plate 23 and the rotating shaft 21, and the bottom surface of the conical cover 15 is lower than the top edge of the beating plate 23, so that the grains falling from the conical cover 15 are uniformly distributed between the beating plates 23 on the annular groove 201, and the grains can be effectively thrown out under the impact of the beating plate 23, avoiding that part of the qualified grains enter the hopper 3 due to insufficient impact force, thereby improving the selection rate of qualified grains.

[0033] Preferably, as shown in Figure 1 , Figure 2 and Figure 4 , a plurality of blades 24 are arranged on the outer side of the circumference of the rotating disc 2, and the side of the blade 24 facing the rotating direction of the rotating disc 2 is inclined towards the upper side of the rotating disc 2, when the rotating disc 2 rotates, the upward airflow is generated by the blade 24, which is used to make the light objects such as impurities and dust rise, thereby improving the discharge rate of impurities and dust and reducing the power demand of the negative pressure equipment.

[0034] Further preferably, as shown in Figure 2 , the side of the blade 24 facing the rotating direction of the rotating disc 2 is inclined towards the outer side of the rotating disc 2, and during the rotation of the rotating disc 2, part of the grains will inevitably fall from the edge of the rotating disc 2, resulting in waste of raw materials, and the side of the blade 24 facing the rotating direction of the rotating disc 2 is used to perform secondary beating on the grains falling around the rotating disc 2, because the side of the grains participating in beating is not only inclined towards the upper side of the rotating direction of the rotating disc 2, but also inclined towards the outside of the rotating disc 2, so that the grains subjected to beating will move towards the outer side of the upper end of the hopper 3, and the above-mentioned way can further improve the selection rate of qualified grains and reduce the waste of raw materials.

[0035] The above-mentioned is only the preferred embodiment of the present application, and does not mean the only or limit the present application. Those skilled in the art should understand that various changes or equivalent replacements made to the present application without departing from the scope of the present application, all belong to the scope of protection of the present application.

Claims

1. A multi-stage grain sorting device, characterized in that, include: The shell (1) has a hopper (11) at the top and a discharge pipe (12) at the bottom. Turntable (2), with a rotating shaft (21) coaxially mounted on top. Turntable (2) is horizontally mounted inside housing (1). The upper end of rotating shaft (21) passes upward through the connection between hopper (11) and housing (1). The lower end of rotating shaft (21) is provided with multiple straight plates (22) spaced along the circumference. The straight plates (22) are located at the junction of housing (1) and hopper (11). The top surface of turntable (2) has an annular groove (201). The edge of the annular groove (201) is raised upward. Multiple striking plates (23) are arranged in a circular array inside the annular groove (201). The striking plates (23) are perpendicular to the bottom surface of turntable (2). Rotating shaft (21) is driven by a motor. The funnel (3) is located inside the shell (1) and coaxially below the turntable (2). The bottom of the funnel (3) is provided with a discharge pipe (31), which passes through the shell (1) downwards. The upper inner wall of the funnel (3) is an inverted conical surface. The conical surface is spaced apart from the outer wall of the turntable (2). The upper outer edge of the funnel (3) is spaced apart from the inner wall of the shell (1). The negative pressure pipe (4) is a circular structure, which is spaced above the funnel (3). The negative pressure pipe (4) is connected to the air extraction equipment, and a suction hole is opened on its bottom surface. A bag filter is installed between the negative pressure equipment and the negative pressure pipe (4). The outer circumference of the turntable (2) is provided with multiple blades (24), the blades (24) are inclined towards the top of the turntable (2) on the side facing the rotation direction of the turntable (2); the blades (24) are inclined towards the outside of the turntable (2) on the side facing the rotation direction of the turntable (2).

2. The multi-stage grain sorting device according to claim 1, characterized in that, The position of the funnel (3) in the vertical direction is adjustable.

3. A multi-stage grain sorting device according to claim 1 or 2, characterized in that, The tangent extension line at the edge of the annular groove (201) coincides with the conical surface in the vertical direction, and the included angle between the conical surface of the funnel (3) and the rotating shaft (21) is smaller than the included angle between the tangent extension line at the edge of the annular groove (201) and the rotating shaft (21), and the difference in angle is 2°~6°.

4. A multi-stage grain sorting device according to claim 1, characterized in that, A buffer chamber (14) is provided at the part of the shell (1) that is connected to the hopper (11). The upper end of the straight plate (22) extends into the buffer chamber (14), and the lower end of the straight plate (22) extends downward into the shell (1).

5. A multi-stage grain sorting device according to claim 1, characterized in that, The bottom of the top plate of the housing (1) is provided with a conical cover (15), which is coaxially sleeved on the outside of the rotating shaft (21). The large end of the conical cover (15) faces downward, and there is a gap between the bottom of the conical cover (15) and the top surface of the turntable (2).

6. A multi-stage grain sorting device according to claim 5, characterized in that, There is a gap between the striking plate (23) and the rotating shaft (21), the lower end of the conical cover (15) is located between the striking plate (23) and the rotating shaft (21), and the bottom surface of the conical cover (15) is lower than the top edge of the striking plate (23).

7. A multi-stage grain sorting device according to claim 2, characterized in that, The bottom of the shell (1) is provided with a telescopic device (13) for driving the funnel (3) to move in the vertical direction.

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