Multi-stage screening device

Abstract

According to the multi-stage screening device, preliminary screening and filtering of seeds are achieved through an inverted V-shaped frame and first-stage filtering holes, the seeds left after preliminary filtering enter a first-stage outlet communicating groove, and the seeds are screened again through a re-screening structure and finally discharged from a first-stage outlet. The seeds falling into the V-shaped guide surface in the preliminary screening and filtering process are screened again through the second-stage filtering holes, medium-sized seeds and small-sized waste seeds are distinguished, and the seeds are discharged from the second-stage outlet and the third-stage outlet through the flow dividing frame, the middle partition plate and the lower-layer cavity respectively, so that the device is provided with a multi-stage screening and filtering structure, manual operation is not needed, and the working efficiency is greatly improved. And the seeds can be screened after being poured in, and compared with a traditional manual screening mode, the screening device is more efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of seed screening, in particular to a multi-stage screening device. Background Art

[0002] In agricultural production, crop seeds are used as production raw materials. Through labor and giving plants a certain amount of growth time, mature agricultural products are obtained. During the entire planting process, the quality of seeds is the basis of product quality. Therefore, the seeds to be planted are usually screened before planting.

[0003] In actual production, most seeds need to be selected manually by farmers themselves, which is inefficient and has high manual output and costs. In addition, when selecting seeds, farmers rely entirely on their own experience, which is prone to errors. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model discloses a multi-stage screening device, which adopts the technical scheme of comprising a vibration motor, a blower, a screening box, a base, a feeding port, a primary outlet, a secondary outlet, a tertiary outlet, an inverted V-shaped frame, a primary filter hole, guide rails on both sides, a primary outlet connecting groove, a re-screening structure, a primary outlet auxiliary discharging mechanism, a V-shaped guide surface, a secondary filter hole, an air blowing port, a diverter frame, an inclined bottom surface in the box, a middle discharging portion and a lower cavity, and a blower is installed at the rear side of the screening box. The bottom is supported by a base, a feeding port is arranged on the top, a primary outlet, a secondary outlet and a tertiary outlet are arranged on the front side of the screening box, an inverted V-shaped frame is fixed on the top of the screening box, the lower side of the inverted V-shaped frame is connected to the V-shaped guide surface, the position of the feeding port corresponds to the middle of the inverted V-shaped frame, a number of primary filter holes are arranged on the inverted V-shaped frame, due to the shape characteristics of the inverted V-shaped frame, when the material is poured in, it will move to both sides, and the primary screening will be carried out through the primary filter holes during the movement, the two sides of the inverted V-shaped frame are connected to the two side guide tracks arranged in the screening box, and the seeds enter the two guide tracks after the initial screening during the movement, the bottom surfaces of the two side guide tracks are inclined surfaces, the front side is lower, and the lower part of the opening at the lower part is a primary outlet connecting groove, and the seeds finally enter the primary outlet connecting groove under the guidance of the inclined bottom surfaces of the two side guide tracks, and a primary outlet auxiliary discharging mechanism is arranged in the primary outlet connecting groove, because the initial screening is carried out in the process of free sliding of the seeds, it is inevitable that some seeds will slip through the net, and the primary outlet is arranged in the primary outlet connecting groove. The auxiliary discharging mechanism performs re-screening, and a number of secondary filter holes are opened on the V-shaped guide surface. The secondary filter holes lead to the lower cavity below. Seeds that are too small will enter the lower cavity from the secondary filter holes. An air outlet is arranged on the rear side of the screening box, which is connected with the output end of the blower. The seeds can be blown through the blower and the air outlet. A diverter frame is fixed on the front side of the inverted V-shaped frame and the V-shaped guide surface. The bottom surface of the inside of the screening box is an inclined bottom surface of the box with a low front and a high back. The middle part is the middle discharging part, and the middle discharging part is connected with the lower cavity.

[0005] As a preferred technical solution of the utility model, the re-screening structure includes a partition and partition filter holes. A partition is vertically fixed on the lower side of the inclined bottom surface of the first-level outlet connecting groove. The partition filter holes are evenly distributed on the partition, and the area between the partition and the vertical part of the diversion frame is connected to the secondary outlet.

[0006] As a preferred technical solution of the utility model, the auxiliary discharging mechanism of the first-level outlet includes an installation cavity, an electric push rod and a push plate. The screening box is provided with an installation cavity located behind the first-level outlet connecting groove, in which the electric push rod is installed. The push plate is fixed at the output end of the electric push rod, and the push plate is placed in the first-level outlet connecting groove.

[0007] As a preferred technical solution of the utility model, the push plate is a hard rubber plate.

[0008] As a preferred technical solution of the utility model, the middle discharge part includes a middle partition and a middle blowing port. Two middle partitions are fixed between the lower middle part of the lower cavity and the inclined bottom surface in the box. The area between the two middle partitions is connected with the lower cavity. The rear side of the middle partition is provided with a middle blowing port, and the area between the middle partitions is connected with the third-level outlet.

[0009] The beneficial effects of the utility model are as follows: preliminary screening and filtration of seeds are achieved through the inverted V-shaped frame and the primary filter holes, the seeds remaining after the preliminary filtration enter the primary outlet connecting slot, are screened again by the re-screening structure and are finally discharged from the primary outlet, the seeds that fall into the V-shaped guide surface during the preliminary screening and filtration are screened again by the secondary filter holes, medium-sized seeds and small waste seeds are distinguished, and are discharged from the secondary outlet and the tertiary outlet respectively through the diversion frame, the middle partition and the lower cavity. The device is provided with a multi-stage screening and filtration structure, and no manual operation is required, the seeds can be screened after being poured in, which is more efficient than the traditional manual screening method. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0012] Figure 3 It is a front side cross-sectional structural schematic diagram of the utility model;

[0013] Figure 4 It is a left side sectional structural schematic diagram of the utility model.

[0014] In the figure: vibration motor 101, blower 102, screening box 1, base 2, feeding port 3, primary outlet 4, secondary outlet 5, tertiary outlet 6, inverted V-shaped frame 7, primary filter hole 8, guide rails on both sides 9, primary outlet connecting groove 10, partition 11, partition filter hole 12, V-shaped guide surface 13, secondary filter hole 14, blowing port 15, diverter frame 16, inclined bottom surface 17 in the box, middle partition 18, lower cavity 19, middle blowing port 20, installation cavity 21, electric push rod 22, push plate 23. DETAILED DESCRIPTION

[0015] Example 1

[0016] like Figures 1 to 4As shown, the utility model discloses a multi-stage screening device, and the technical scheme adopted is that it includes a vibration motor 101, a blower 102, a screening box 1, a base 2, a feeding port 3, a primary outlet 4, a secondary outlet 5, a tertiary outlet 6, an inverted V-shaped frame 7, a primary filter hole 8, guide rails 9 on both sides, a primary outlet connecting groove 10, a re-screening structure, a primary outlet auxiliary discharging mechanism, a V-shaped guide surface 13, a secondary filter hole 14, an air blowing port 15, a diverter frame 16, an inclined bottom surface 17 in the box, a middle discharging portion and a lower cavity 19; the blower 102 is installed on the rear side of the screening box 1, the bottom is supported by the base 2, and the feeding port 3 is arranged on the top; the primary outlet 4, the secondary outlet 5 and the tertiary outlet 6 are opened on the front side of the screening box 1; the inverted V-shaped frame 7 is fixed on the upper part of the screening box 1, and the lower side of the inverted V-shaped frame 7 is connected to the V-shaped guide surface 13; the inverted V-shaped frame 7 A plurality of primary filter holes 8 are provided on the top; both sides of the inverted V-shaped frame 7 are connected to the guide rails 9 on both sides arranged in the screening box 1; the bottom surface of the guide rails 9 on both sides is an inclined surface, the front side is lower, and the lower opening is a primary outlet connecting groove 10; a primary outlet auxiliary discharging mechanism is provided in the primary outlet connecting groove 10; a primary outlet auxiliary discharging mechanism is also provided in the primary outlet connecting groove 10; a plurality of secondary filter holes 14 are provided on the V-shaped guide surface 13, and the secondary filter holes 14 lead to the lower cavity 19 below; a blowing port 15 is provided on the rear side of the inside of the screening box 1, which is connected to the output end of the blower 102; a diverter frame 16 is fixed to the front side of the inverted V-shaped frame 7 and the V-shaped guide surface 13; the bottom surface of the inside of the screening box 1 is an inclined bottom surface 17 in the box with a lower front and a higher rear, and the middle part is a middle discharging part, which is connected to the lower cavity 19.

[0017] As a preferred technical solution of the utility model, the re-screening structure includes a partition 11 and partition filter holes 12; a partition 11 is vertically fixed to the lower side of the inclined bottom surface of the primary outlet connecting groove 10; the partition filter holes 12 are evenly distributed on the partition 11; the area between the partition 11 and the vertical part of the diverter rack 16 is connected to the secondary outlet 5.

[0018] As a preferred technical solution of the utility model, the auxiliary discharge mechanism of the primary outlet includes an installation cavity 21, an electric push rod 22 and a push plate 23; the screening box 1 has an installation cavity 21 located behind the primary outlet connecting groove 10, in which the electric push rod 22 is installed; the output end of the electric push rod 22 is fixed with a push plate 23, and the push plate 23 is placed in the primary outlet connecting groove 10.

[0019] As a preferred technical solution of the present utility model, the push plate 23 is a hard rubber plate.

[0020] As a preferred technical solution of the utility model, the middle discharge part includes a middle partition 18 and a middle blowing port 20; two middle partitions 18 are fixed between the lower middle part of the lower cavity 19 and the inclined bottom surface 17 in the box, and the area between the two middle partitions 18 is connected to the lower cavity 19; the rear side of the middle partition 18 is provided with a middle blowing port 20; the area between the middle partitions 18 is connected to the third-level outlet 6.

[0021] The working principle of the utility model is as follows: when in use, seeds are poured in from the feeding port 3, and the seeds are moved twice under the action of the inverted V-shaped frame 7. After the pouring is completed, some seeds will remain on the horizontal part of the inverted V-shaped frame 7, and this part can be manually pushed twice. During the movement of the seeds along the inclined surface of the inverted V-shaped frame 7, they are preliminarily screened and filtered through the primary filter holes 8 opened thereon. Normal full seeds will not be missed but enter the guide rails 9 on both sides and finally fall into the primary outlet connecting groove 10. The seeds in the primary outlet connecting groove 10 can be pushed out from the primary outlet 4 by starting the electric push rod 22 to drive the push plate 23. The unfull seeds fall onto the V-shaped guide surface 13 and are screened again through the secondary filter holes 14. The unfull seeds left on the V-shaped guide surface 13 are of different sizes. Small but can still be used. This part of the seeds is blown forward by the wind when the blower is started, and finally enters the position between the partition 11 and the middle partition 18 through the diverter rack 16 and is discharged from the secondary outlet under the guidance of the inclined bottom surface 17 in the box. The seeds leaked at the secondary filter hole 14 are unusable seeds. This part of the seeds falls into the position between the two middle partitions 18 under the guidance of the inclined surface inside the lower cavity 19. In the above screening process, the vibration motor 101 used by the external power supply is always in the started state. Since the entire inverted V-shaped frame 7 and the V-shaped guide surface 13 are connected together, when the vibration motor 101 vibrates, the above structure will vibrate with a certain amplitude. Although the amplitude is small, it can meet the screening requirements for seed screening.

[0022] Components not described in detail herein are prior art.

[0023] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. A multi-stage screening device, comprising a vibration motor (101) and a blower (102), characterized in that: The invention comprises a screening box (1), a base (2), a feeding port (3), a primary outlet (4), a secondary outlet (5), a tertiary outlet (6), an inverted V-shaped frame (7), a primary filter hole (8), guide rails on both sides (9), a primary outlet connecting groove (10), a re-screening structure, a primary outlet auxiliary discharge mechanism, a V-shaped guide surface (13), a secondary filter hole (14), an air blowing port (15), a flow distribution frame (16), an inclined bottom surface in the box (17), a middle discharge portion and a lower empty space cavity (19); a blower (102) is installed on the rear side of the screening box (1), the bottom is supported by a base (2), and a feeding port (3) is arranged on the top; a primary outlet (4), a secondary outlet (5) and a tertiary outlet (6) are opened on the front side of the screening box (1); an inverted V-shaped frame (7) is fixed on the top of the screening box (1), and the lower side of the inverted V-shaped frame (7) is connected to a V-shaped guide surface (13); a plurality of primary filter holes (8) are opened on the inverted V-shaped frame (7); The two sides of the inverted V-shaped frame (7) are connected to the two side guide rails (9) arranged in the screening box (1); the bottom surface of the two side guide rails (9) is an inclined surface, the front side is lower, and the lower part of the opening is a primary outlet communication groove (10); the primary outlet communication groove (10) is provided with a primary outlet auxiliary discharge mechanism; the primary outlet communication groove (10) is also provided with a primary outlet auxiliary discharge mechanism; the V-shaped guide surface (13) is provided with a plurality of secondary filter The secondary filter hole (14) leads to the lower cavity (19) below; the rear side of the screening box (1) is provided with an air outlet (15) which is connected to the output end of the blower (102); a flow divider (16) is fixed to the front side of the inverted V-shaped frame (7) and the V-shaped guide surface (13); the bottom surface of the screening box (1) is an inclined bottom surface (17) inside the box which is lower in front and higher in the back, and the middle part is a middle discharge part which is connected to the lower cavity (19).

2. A multi-stage screening device according to claim 1, characterized in that: The re-screening structure comprises a partition (11) and partition filter holes (12); a partition (11) is vertically fixed to the lower side of the inclined bottom surface of the primary outlet communication groove (10); the partition filter holes (12) are evenly distributed on the partition (11); and the area between the partition (11) and the vertical part of the diverter frame (16) is connected to the secondary outlet (5).

3. A multi-stage screening device according to claim 1, characterized in that: The primary outlet auxiliary discharge mechanism comprises a mounting cavity (21), an electric push rod (22) and a push plate (23); the screening box (1) is provided with a mounting cavity (21) located behind the primary outlet communication groove (10), in which the electric push rod (22) is installed; the output end of the electric push rod (22) is fixed with a push plate (23), and the push plate (23) is matched and placed in the primary outlet communication groove (10).

4. A multi-stage screening device according to claim 3, characterized in that: The push plate (23) is a hard rubber plate.

5. A multi-stage screening device according to claim 1, characterized in that: The middle discharge portion comprises a middle partition (18) and a middle blowing port (20); two middle partitions (18) are fixed between the middle part of the lower cavity (19) and the inclined bottom surface (17) in the box, and the area between the two middle partitions (18) is connected to the lower cavity (19); the rear side surface of the middle partition (18) is provided with a middle blowing port (20); the area between the middle partitions (18) is connected to the third-level outlet (6).

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