Primary screening device of compound classificator
By installing a screening box, screening plate, and vibrating motor in the double-stage grain sorting machine, and setting up dust removal channels and negative pressure dust removal components on both sides of the screening box, the problem of dust flying around is solved, and efficient grain screening and dust removal effects are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI HELIDA GRAIN SELECTING MACHINERY TECHCO
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-19
AI Technical Summary
When screening grains, dust tends to fly around in existing double-layer grain separators, affecting the screening effect of gravity screens.
A screening box, screening plate, and vibrating motor are installed in front of the gravity screen, and first and second dust removal channels are set on both sides of the screening box, connected to a negative pressure dust removal component. Through the combination of the screening box and the dust removal channels, two dust removal processes are achieved, reducing the impact of dust on the gravity screen.
It effectively reduces the impact of dust on the comparison screening, improves screening efficiency, and ensures the cleanliness of grain.
Smart Images
Figure CN224253521U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of grain processing, and in particular discloses a primary screening device for a compound grain separator. Background Technology
[0002] Grain screening devices are essential equipment in the grain processing process. During harvesting, transportation and processing, grain inevitably gets mixed with some impurities, including dirt, dust, stones, husks and spoiled grain. The processing volume is very large, the processing speed is fast, and the feeding of grain is also very difficult. Therefore, it is necessary to screen the grain first to obtain clean grain.
[0003] Existing double-stage grain separators include a lifting device, a frame, a gravity screen, and a grading screen. The lifting device raises the raw grain to the gravity screen, where lighter impurities (empty husks, damaged grains, etc.) are removed. Finally, the grading screen separates large and small particles of impurities from the raw grain, ultimately achieving the fine selection of grain materials.
[0004] In response to the aforementioned prior art, the inventors discovered that, since grain is easily mixed with dust, when the grain is being selected by a compound grain separator, dust tends to fly around on the gravity screen, thus affecting the grain separation by the gravity screen. Utility Model Content
[0005] To reduce the impact of dust on the comparative screening, this application provides a primary screening device for a compound fine separator.
[0006] The primary screening device of the compound fine separator provided in this application adopts the following technical solution:
[0007] A primary screening device for a double-selection machine includes a frame, a screening box, a screening plate, a vibrating motor, and an air separation mechanism. The screening box is mounted on the frame, with a first feed inlet on one side and a first discharge outlet on the other side. The screening plate is fixed inside the screening box, and the vibrating motor is mounted on the screening box and is used to drive the screening box to vibrate.
[0008] The air separation mechanism includes a first dust removal channel, a second dust removal channel, and a negative pressure dust removal assembly. The first dust removal channel has a second inlet on its side, and a second outlet located above the first inlet on the end face of the first dust removal channel near the second inlet. The first dust removal channel has a first dust outlet on its side away from the second outlet. The second dust removal channel has a third inlet on its side, and a third outlet located above the gravity screen on its side face near the third inlet. The second dust removal channel has a second dust outlet on its side away from the third outlet. Two sets of negative pressure dust removal assemblies are provided, and the two sets of negative pressure dust removal assemblies are respectively connected to the first dust outlet of the first dust removal channel and the second dust outlet of the second dust removal channel.
[0009] By adopting the above technical solution, a screening box, screening plate and vibrating motor are set in front of the gravity screen, which can screen out the stones in the raw grain, thereby reducing the screening pressure of the gravity screen; at the same time, a first dust removal channel and a second dust removal channel are set on both sides of the screening box, and a negative pressure dust removal component is connected to the first dust removal channel and the second dust removal channel, which can remove the dust in the raw grain twice, greatly reducing the dust in the raw grain, thereby reducing the impact of dust on the gravity screen.
[0010] Optionally, a material distribution bin is fixed on the side of the first dust removal channel at the second inlet. A fourth inlet is opened at the top of the material distribution bin. The bottom wall of the material distribution bin is inclined. A fourth outlet is opened on the side wall of the material distribution bin and communicates with the second inlet. A material distribution plate is fixed on the inner side wall of the material distribution bin. The material distribution plate includes a horizontal plate and an inclined plate. Two inclined plates are provided, and the two inclined plates are symmetrically fixed on both sides of the horizontal plate.
[0011] By adopting the above technical solution, a material distribution bin is set on one side of the first dust removal channel. After the raw grain enters the horizontal plate of the material distribution plate in the material distribution bin, due to the continuous input of raw grain to the horizontal plate, part of the raw grain falls directly from the horizontal plate, and the other part of the raw grain is squeezed to the inclined plate and then falls from the inclined plate, making the raw grain more dispersed and facilitating the screening and dust removal of the raw grain.
[0012] Optionally, the screening box has an inspection port at its top, and an inspection cover is detachably connected to the inspection port.
[0013] By adopting the above technical solution, after stopping the screening of raw grain, the inspection cover is removed, and the staff can observe and deal with the stones stuck on the screen plate. Before screening the raw grain, the inspection cover is installed to prevent the raw grain from flying out through the inspection port.
[0014] Optionally, the first dust removal channel has a first observation port on the side opposite to the second feed inlet, and a first observation window is fixed at the first observation port; the second dust removal channel has a second observation port on the side opposite to the third feed inlet, and a second observation window is fixed at the second observation port.
[0015] By adopting the above technical solution, staff can observe the dust removal status at the second and third feed inlets through the first and second observation windows, making it easier to promptly understand whether the first or second dust removal channel is blocked.
[0016] Optionally, the screening plate includes a first screening plate and a second screening plate. The first screening plate is located above the second screening plate, and both the first and second screening plates are fixed to the side wall of the screening box. The diameter of the screening holes on the first screening plate is larger than the diameter of the screening holes on the second screening plate. Two symmetrically arranged first inclined grooves are opened on the upper surface of the first screening plate away from the first feed inlet. A first impurity outlet is opened at the bottom of the first inclined groove on the side wall of the screening box. Two symmetrically arranged second inclined grooves are opened on the inner bottom wall of the screening box away from the first feed inlet. A second impurity outlet is opened at the bottom of the second inclined groove on the side wall of the screening box.
[0017] By adopting the above technical solution, not only can stones in the raw grain be screened out, but dust in the raw grain can also be screened out, further reducing the dust in the raw grain.
[0018] Optionally, the outer wall of the screening box is fixed with a discharge bin that communicates with the first and second discharge ports. The discharge bin is divided into a first discharge channel and a second discharge channel by a partition.
[0019] By adopting the above technical solution, it is easier to remove stones and dust.
[0020] Optionally, the frame includes a frame body and rollers, with the rollers mounted on the bottom of the frame body.
[0021] By adopting the above technical solution, it is easy to move the rack.
[0022] Optionally, the threaded leg is vertically arranged and threadedly mounted on the fixed plate.
[0023] By adopting the above technical solution, after the frame moves to the screening position, the threaded support leg is rotated and the threaded support leg is lowered so that the bottom surface of the threaded support leg contacts the ground, making it difficult for the frame to move during screening and facilitating grain screening.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. A screening box, screening plate, and vibrating motor are installed in front of the gravity screen to screen out stones in the raw grain, thereby reducing the screening pressure of the gravity screen. At the same time, a first dust removal channel and a second dust removal channel are set on both sides of the screening box, and negative pressure dust removal components are connected to the first dust removal channel and the second dust removal channel, which can remove dust from the raw grain twice, greatly reducing the dust in the raw grain, thereby reducing the impact of dust on the gravity screen.
[0026] 2. A material distribution bin is set up on one side of the first dust removal channel. After the raw grain enters the horizontal plate of the material distribution plate in the material distribution bin, due to the continuous input of raw grain to the horizontal plate, part of the raw grain falls directly from the horizontal plate, and the other part of the raw grain is squeezed to the inclined plate and falls from the inclined plate, making the raw grain more dispersed, which facilitates the screening and dust removal of the raw grain.
[0027] 3. After stopping the screening of raw grain, the inspection cover is removed so that the staff can observe and deal with the stones stuck on the screen plate. Installing the inspection cover during the screening of raw grain can prevent the raw grain from flying out through the inspection port. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall structure of this application.
[0029] Figure 2 This is a schematic diagram of the overall structure of the negative pressure dust removal unit, which is omitted in this application.
[0030] Figure 3 This is a schematic diagram of the internal structure of the screening box in this application.
[0031] Figure 4 This is a schematic diagram of the internal structure of the first dust removal channel, the second dust removal channel, and the material distribution bin of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Frame body; 12. Roller; 13. Fixing plate; 14. Threaded support leg; 2. Screening box; 21. First feed inlet; 22. First discharge outlet; 23. Inspection port; 24. Inspection cover; 25. Second inclined trough; 3. Screening plate; 31. First screen plate; 311. First inclined trough; 32. Second screen plate; 4. Vibrating motor; 5. Air separation mechanism; 51. First dust removal channel; 511. Second feed inlet; 512. Second... 513. Discharge port; 514. First dust outlet; 52. Second observation window; 521. Second dust removal channel; 522. Third feed inlet; 523. Second dust outlet; 524. Second observation window; 53. Negative pressure dust removal assembly; 531. Spiral dust collector; 532. Airlock; 533. Air duct; 534. Fan; 6. Distribution bin; 61. Fourth feed inlet; 62. Fourth discharge outlet; 63. Distribution plate; 7. Discharge bin; 100. Gravity screen. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0034] This application discloses a primary screening device for a compound fine-grained machine. (Refer to...) Figure 1-3 A primary screening device for a compound separator includes a frame 1, a screening box 2, a screening plate 3, a vibrating motor 4, an air separation mechanism 5, and a material distribution bin 6. The frame 1 includes a frame body 11, rollers 12, fixing plates 13, and threaded legs 14. Four rollers 12 are installed at the four corners of the bottom of the frame body 11. Six fixing plates 13 are symmetrically fixed to the bottom of the frame body 11. Six threaded legs 14 are vertically arranged and threadedly mounted on the six fixing plates 13.
[0035] Reference Figure 1-3 The screening box 2 is mounted on the frame 1. The screening plate 3 is fixedly installed inside the screening box 2. The vibrating motor 4 is mounted on the frame 1. A first feed inlet 21 is opened at the top of one side of the screening box 2, and a first discharge outlet 22 is opened at the bottom of the other side of the screening box 2. Two symmetrically arranged inspection ports 23 are opened on the upper surface of the screening box 2. Inspection covers 24 are detachably connected to the upper surface of the screening box 2 at the inspection ports 23 by bolts. After the raw grain screening is stopped, the inspection covers 24 are removed, and the workers can observe and deal with the stones stuck on the screen plate. Installing the inspection covers 24 before the raw grain screening can prevent the raw grain from flying out through the inspection ports 23.
[0036] Reference Figure 1-3 The screening plate 3 includes a first screening plate 31 and a second screening plate 32. The first screening plate 31 is located above the second screening plate 32, and both the first screening plate 31 and the second screening plate 32 are fixed to the side wall of the screening box 2. The diameter of the screening holes on the first screening plate 31 is larger than the diameter of the screening holes on the second screening plate 32. Two symmetrically arranged first inclined grooves 311 are formed on the upper surface of the first screening plate 31 away from the first feed inlet 21. A first waste outlet is formed at the bottom of the first inclined grooves 311 on the side wall of the screening box 2. Two symmetrically arranged second inclined grooves 25 are formed on the inner bottom wall of the screening box 2 away from the first feed inlet 21. A second waste outlet is formed at the bottom of the second inclined grooves 25 on the side wall of the screening box 2. A discharge bin 7 is fixed on the outer side wall of the screening box 2, communicating with the first waste outlet and the second waste outlet. The discharge bin 7 is divided into a first waste outlet channel and a second waste outlet channel by a partition, which facilitates the discharge of stones and dust.
[0037] Reference Figure 1-3The raw grain enters the screening box 2 through the first feed inlet 21. Under the action of the first screen plate 31, stones cannot pass through it. Under the action of the first inclined chute 311, the stones that cannot pass through the first screen plate 31 are discharged from the first discharge outlet. Under the action of the first screen plate 31 and the second screen plate 32, the screened raw grain is located between the first screen plate 31 and the second screen plate 32. The raw grain located between the first screen plate 31 and the second screen plate 32 is discharged from the first discharge outlet 22. Under the action of the second screen plate 32, dust passes through the second screening plate 32. Under the action of the second inclined chute 25, the dust passing through the second screen plate 32 is discharged from the impurity removal outlet. This facilitates the screening out of stones and dust from the raw grain.
[0038] Reference Figure 1 , Figure 2 as well as Figure 4 The air separation mechanism 5 includes a first dust removal channel 51, a second dust removal channel 52, and a negative pressure dust removal component 53. A second feed inlet 511 is provided on the side of the first dust removal channel 51. A second discharge outlet 512, located above the first feed inlet 51, is provided on the end face of the first dust removal channel 51 near the second feed inlet 511. A first dust outlet 513 is provided on the end of the first dust removal channel 51 away from the second discharge outlet 512. A first observation port is provided on the side of the first dust removal channel 51 away from the second feed inlet 511, and a first observation window 514 is fixed at the first observation port. This allows personnel to observe the dust removal status of the second feed inlet 511.
[0039] Reference Figure 1 , Figure 2 as well as Figure 4 The second dust removal channel 52 has a third feed inlet 521 on its side. A third discharge outlet 522, located above the gravity screen 100, is located on the end face of the second dust removal channel 52 near the third feed inlet 521. A second dust outlet 523 is located on the end of the second dust removal channel 52 opposite to the third discharge outlet 522. A second observation port is located on the side of the second dust removal channel 52 opposite to the third feed inlet 521, and a second observation window 524 is fixed at the second observation port. This allows staff to observe the dust removal status of the third feed inlet 521.
[0040] Reference Figure 1 , Figure 2 as well as Figure 4Two sets of negative pressure dust collection components 53 are provided, and the two sets of negative pressure dust collection components 53 are respectively connected to the first dust outlet 513 of the first dust collection channel 51 and the second dust outlet 523 of the second dust collection channel 52. The negative pressure dust collection component 53 includes a spiral dust collector 531, an airlock 532, an air duct 533, and a fan 534. The spiral dust collector 531 is connected to the first dust collection channel 51 or the second dust collection channel 52 through a flexible hose. The airlock 532 is fixedly installed at the bottom of the spiral dust collector 531. The fan 534 is connected to the top of the spiral dust collector 531 through the air duct 533.
[0041] Reference Figure 1 , Figure 2 as well as Figure 4 A first dust removal channel 51 and a second dust removal channel 52 are respectively set on both sides of the screening box 2, and a negative pressure dust removal component 53 is connected to the first dust removal channel 51 and the second dust removal channel 52. This can remove the dust in the raw grain twice, greatly reduce the dust in the raw grain, and thus reduce the impact of dust on the relative heavy screening 100.
[0042] Reference Figure 1 , Figure 2 as well as Figure 4 The distribution bin 6 is fixed at the second inlet 511 on the side of the first dust removal channel 51. A fourth inlet 61 is provided at the top of the distribution bin 6. The bottom wall of the distribution bin 6 is inclined, and a fourth outlet 62 communicating with the second inlet 511 is provided on the side wall of the distribution bin 6. A distribution plate 63 is fixed to the inner side wall of the distribution bin 6. The distribution plate 63 includes a horizontal plate and an inclined plate. Two inclined plates are provided, and the two inclined plates are symmetrically fixed on both sides of the horizontal plate. After the raw grain enters the horizontal plate of the distribution plate 63 in the distribution bin 6, due to the continuous input of raw grain to the horizontal plate, part of the raw grain falls directly from the horizontal plate, while the other part of the raw grain is squeezed to the inclined plate and falls from the inclined plate, making the raw grain more dispersed and facilitating screening and dust removal.
[0043] The principle of the primary screening device of a compound grain separator according to an embodiment of this application is as follows: The lifting device can lift the raw grain to the distribution box. The raw grain enters the distribution box through the fourth inlet 61, and under the action of the distribution plate 63 in the distribution box, the raw grain is dispersed. The dispersed raw grain enters the first dust removal channel 51 through the fourth outlet 62 and the second inlet 511. The raw grain entering the first dust removal channel 51 falls into the screening box 2 through the second outlet 512 and the first inlet 21. Under the action of the negative pressure dust removal component 53, the negative pressure dust removal component 53 absorbs the dust in the raw grain entering the first dust removal channel 51 from the second inlet 511. Under the action of the first screen plate 31 and the second screen plate 32, stones and dust in the raw grain can be screened out. The screened raw material is discharged from the screening box 2 through the first outlet 22. The raw grain discharged from screening box 2 enters the second dust removal channel 52 through the third feed inlet 521, and is discharged from the second dust removal channel 52 through the third discharge outlet 522, thus causing the raw grain to fall onto the gravity screen 100. Under the action of the negative pressure dust removal component 53, the negative pressure dust removal component 53 absorbs the dust in the raw grain that enters the second dust removal channel 52 from the third feed inlet 521.
[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A primary screening device for a compound fine-selection machine, characterized in that: The system includes a frame (1), a screening box (2), a screening plate (3), a vibrating motor (4), and an air separation mechanism (5). The screening box (2) is installed on the frame (1). A first feed inlet (21) is provided on one side of the screening box (2), and a first discharge outlet (22) is provided on the other side of the screening box (2). The screening plate (3) is fixed inside the screening box (2). The vibrating motor (4) is installed on the screening box (2) and is used to drive the screening box (2) to vibrate. The air separation mechanism (5) includes a first dust removal channel (51), a second dust removal channel (52), and a negative pressure dust removal component (53). The first dust removal channel (51) has a second inlet (511) on its side. The first dust removal channel (51) has a second outlet (512) on its end face near the second inlet (511) above the first inlet (21). The first dust removal channel (51) has a first dust outlet (513) on its end face away from the second outlet (512). The second dust removal channel (52) has a second outlet (513) on its side. The second dust removal channel (52) has a third discharge port (522) located above the gravity screen (100) on one end face of the second dust removal channel (521) near the third feed port (521). The second dust removal channel (52) has a second dust outlet (523) at one end away from the third discharge port (522). The negative pressure dust removal assembly (53) is provided in two sets. The two sets of negative pressure dust removal assemblies (53) are respectively connected to the first dust outlet (513) of the first dust removal channel (51) and the second dust outlet (523) of the second dust removal channel (52).
2. The primary screening device of a compound fine-selection machine according to claim 1, characterized in that: The first dust removal channel (51) has a material distribution bin (6) fixed on the side at the second feed inlet (511). The top of the material distribution bin (6) has a fourth feed inlet (61). The bottom wall of the material distribution bin (6) is inclined. The side wall of the material distribution bin (6) has a fourth discharge outlet (62) that communicates with the second feed inlet (511). The inner side wall of the material distribution bin (6) has a material distribution plate (63). The material distribution plate (63) includes a horizontal plate and an inclined plate. Two inclined plates are provided, and the two inclined plates are symmetrically fixed on both sides of the horizontal plate.
3. The primary screening device of a compound fine-selection machine according to claim 1, characterized in that: The screening box (2) has an inspection port (23) at the top, and the screening box (2) has an inspection cover (24) that can be detachably connected to the inspection port (23).
4. The primary screening device of a compound fine-selection machine according to claim 1, characterized in that: The first dust removal channel (51) has a first observation port on the side away from the second feed inlet (511), and a first observation window (514) is fixed at the first observation port; the second dust removal channel (52) has a second observation port on the side away from the third feed inlet (521), and a second observation window (524) is fixed at the second observation port.
5. The primary screening device of a compound fine-selection machine according to claim 1, characterized in that: The screening plate (3) includes a first screening plate (31) and a second screening plate (32). The first screening plate (31) is located above the second screening plate (32), and both the first screening plate (31) and the second screening plate (32) are fixed to the side wall of the screening box (2). The diameter of the screening hole on the first screening plate (31) is larger than the diameter of the screening hole on the second screening plate (32). Two symmetrically arranged first inclined grooves (311) are opened on the side of the upper surface of the first screening plate (31) away from the first feed inlet (21). A first impurity outlet is opened at the bottom of the first inclined groove (311) on the side wall of the screening box (2). Two symmetrically arranged second inclined grooves (25) are opened on the side of the inner bottom wall of the screening box (2) away from the first feed inlet (21). A second impurity outlet is opened at the bottom of the second inclined groove (25) on the side wall of the screening box (2).
6. The primary screening device of a compound fine-selection machine according to claim 5, characterized in that: The outer wall of the screening box (2) is fixed with a discharge hopper (7) that communicates with the first and second discharge ports. The discharge hopper (7) is divided into a first discharge channel and a second discharge channel by a partition.
7. The primary screening device of a compound fine-selection machine according to claim 1, characterized in that: The frame (1) includes a frame body (11) and rollers (12), with the rollers (12) mounted on the bottom of the frame body (11).
8. The primary screening device of a compound fine-selection machine according to claim 7, characterized in that: The frame (1) also includes a fixing plate (13) and a threaded support leg (14). The fixing plate (13) is fixed to the bottom of the frame body (11), and the threaded support leg (14) is vertically arranged and threadedly installed on the fixing plate (13).