Residual dust separation device and separation method

Abstract

The invention discloses a residual dust separation device and a separation method, and belongs to the technical field of agricultural product processing machinery. The material bin comprises a material bin body, the bottom of the material bin body is provided with a dust outlet and a residue outlet which are communicated with an inner cavity in parallel, and the top of the material bin body is provided with a feeding port corresponding to the dust outlet and communicated with the inner cavity; the material pushing mechanism comprises a driving mechanism and a material pushing assembly; the pushing assembly is connected to the inner side wall of the stock bin body in a reciprocating sliding mode in the direction of the dust outlet and the impurity outlet and hinged to the output end of the driving mechanism. Wherein the material pushing assembly has an initial position and a compaction position, and the initial position is that the material pushing end of the material pushing assembly is located on the side, away from the impurity outlet, of the material inlet; the compaction position is that the material pushing end of the material pushing assembly is located above the impurity outlet; and a screen. Through reciprocating sliding of the material pushing assembly, impurities and dust can be separated, the fluffy impurities can be repeatedly compacted and formed, the size of the impurities is reduced, follow-up storage or transportation is facilitated, and the storage and transportation cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural product processing machinery, and in particular to a device and method for separating miscellaneous dust. Background Art

[0002] With the widespread use of grain and seed processing machinery, the problem of large amounts of debris and dust generated during processing has become increasingly prominent. Agricultural products such as grain and seed processing workshops generally collect debris and dust at the same time, and the debris that needs to be processed is large and inconvenient to handle. The debris usually contains a lot of organic matter such as broken grains, seed coats, and broken leaves, and these organic matter can be separated and recycled again, processed into feed, fertilizer, etc., thereby reducing the amount of debris waste, which is economical and environmentally friendly. Some existing processing devices can screen debris through multi-stage screening mechanisms, but the dust cannot be separated, and the light debris of agricultural products is relatively fluffy due to the high content of bracts, broken leaves, etc., and directly storing them after screening takes up a lot of space, is inconvenient to transport, and has high cost.

[0003] Therefore, how to provide a residual dust separation device that can separate and collect residuals from dust while also compressing the residuals to reduce the storage space of the residuals is a top priority for those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention aims to provide a debris dust separation device, which can achieve the separation of debris and dust to a certain extent, and solve the problem that light debris of agricultural products is relatively fluffy due to the high content of bracts, broken leaves, etc., and directly stored after separation, which takes up a lot of space, is inconvenient to transport and has high cost.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A residual dust separation device, comprising:

[0007] A silo body, wherein a dust outlet and a residual outlet connected to the inner cavity of the silo are opened in parallel at the bottom of the silo body, and an inlet connected to the inner cavity of the silo body is opened at the top corresponding to the dust outlet;

[0008] A pushing mechanism, comprising a driving mechanism and a pushing assembly; the pushing assembly is connected to the inner wall of the silo body in a reciprocating sliding manner along the direction of the dust outlet and the residual outlet, and is hinged to the output end of the driving mechanism; wherein the pushing assembly has an initial position and a compacting position, the initial position being that the feed inlet is located between the pushing end of the pushing assembly and the residual outlet; the compacting position being that the pushing end of the pushing assembly is located above the residual outlet;

[0009] a screen installed in the dust outlet;

[0010] A debris unloading assembly is installed at the debris outlet.

[0011] The beneficial effects that can be achieved by the present invention are as follows: during the movement of the pushing component from the initial position to the compacting position, the miscellaneous dust mixture material thrown into the inner cavity of the silo body can be pushed to move from the dust outlet to the miscellaneous dust outlet. During the movement, the dust is screened out through the screen, and the miscellaneous dust is accumulated and compacted above the miscellaneous dust outlet, and finally discharged through the miscellaneous dust unloading component, thereby realizing the process of separating and compressing the miscellaneous dust and dust, facilitating the recovery of miscellaneous dust, reducing the volume during recovery, saving storage space, and reducing cost expenditure.

[0012] Preferably, the driving mechanism includes a driving motor, a driving shaft, a rotating disk, a driven shaft and a connecting rod; the driving motor is fixed on the side wall of the silo body; the driving shaft is arranged in a direction perpendicular to the dust outlet and the residual outlet and one end is fixedly connected to the output shaft of the driving motor; the center of the rotating disk is fixed to the other end of the driving shaft; the driven shaft is arranged parallel to the driving shaft and one end is fixed to the rotating disk surface on the outer peripheral side of the driving shaft; one end of the connecting rod is rotatably connected to the other end of the driven shaft, and the other end is hinged to the pushing assembly.

[0013] Preferably, the pushing assembly includes a side push plate and a lower scraper, the side push plate surface is arranged in a direction perpendicular to the dust outlet and the residual outlet, and is slidably connected to the inner side wall of the silo body along the direction of the dust outlet and the residual outlet; the lower scraper is fixed to the bottom of the side push plate, and the scraping end at the bottom is slidably connected to the top surface of the screen; the end of the connecting rod away from the driven shaft is hinged to the side push plate.

[0014] Preferably, the pushing assembly also includes an upper baffle, the surface of which is fixed to the top of the side push plate along the direction of the dust outlet and the debris outlet, and is slidably connected to the top wall of the silo body along the direction of the dust outlet and the debris outlet.

[0015] Preferably, a dust collecting box is further included, the top of the dust collecting box is open and the open end thereof is detachably mounted on the bottom of the screen.

[0016] Preferably, two first slide rails arranged in parallel are fixed to the bottom of the screen, and the slide bars on both sides of the top open end of the dust collecting box are slidably matched with the two first slide rails.

[0017] Preferably, the debris unloading assembly includes a lever, a unloading plate and a counterweight block, the middle part of the lever is hinged to the bottom of the debris outlet, the unloading plate and the counterweight block are respectively fixed at both ends of the lever, and the unloading plate can block or open the debris outlet.

[0018] A method for separating stray dust, using the stray dust separation device described above, comprises the following steps:

[0019] S1. Put the residual dust mixture to be separated into the inner cavity of the silo through the feed inlet;

[0020] S2. Using a driving mechanism to drive the pushing assembly to move from the initial position to the compacting position, so as to push the mixed dust mixture to move through the pushing assembly. During the movement, the dust is screened out through the screen, and the mixed dust is pushed by the pushing assembly to the space above the mixed dust outlet for compaction;

[0021] S3. When the pushing assembly moves to the compacting position, the driving mechanism drives the pushing assembly to move in the opposite direction back to the initial position, and the residual dust mixture can enter the silo body cavity above the screen through the feed port again;

[0022] S4. Repeat steps 1 to 3 continuously. The pushing assembly repeatedly pushes the mixture to sieve out the dust and repeatedly pushes the residue toward the residue outlet. The residue gradually accumulates and is compacted in the space above the residue outlet.

[0023] S5. When the compacted debris reaches a certain weight, the debris unloading component opens to discharge the compacted debris.

[0024] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a device and method for separating residual dust, which has the following beneficial effects:

[0025] 1. The present invention can separate and collect the debris and dust and compact the separated debris at the same time. The separated debris can be used for recycling, and the storage space of the debris is reduced, transportation is convenient, and transportation costs are saved.

[0026] 2. The dust separated by the present invention is collected in a dust collecting box, which can avoid polluting the external air.

[0027] 3. The present invention utilizes a counterweight block and a lever to automatically open a discharge plate according to the weight of the compacted debris, and automatically discharge the compacted debris, thereby improving discharge efficiency and reducing discharge costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1This is a schematic diagram of the three-dimensional structure of a residual dust separation device provided by the present invention.

[0030] Figure 2 This is a schematic diagram of the three-dimensional structure of the pushing mechanism provided by the present invention.

[0031] Figure 3 This is a schematic diagram of the cross-sectional structure of the pusher assembly provided by the present invention when it is in the compacting position.

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the pusher assembly provided by the present invention when it is in the initial position.

[0033] Figure 5 This is a simplified structural schematic diagram of the pusher assembly provided by the present invention when it is in the initial position.

[0034] Figure 6 This is a simplified structural diagram of the pusher assembly provided by the present invention when it is in the compacting position.

[0035] Figure 7 This is a simplified structural diagram of the pusher assembly provided by the present invention when it is in the middle position.

[0036] In the figure: 1. silo body, 11. miscellaneous material outlet, 12. material inlet, 2. mounting frame, 3. pushing mechanism, 31. pushing assembly, 311. side push plate, 312. lower scraper, 313. upper baffle, 32. driving mechanism, 321. driving motor, 322. driving shaft, 323. rotating disk, 324. driven shaft, 325. connecting rod, 4. screen, 5. miscellaneous material unloading assembly, 51. lever, 52. unloading plate, 53. counterweight, 6. dust collection box, 61. slide bar, 7. first slide rail, 8. second slide rail. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "parallel", "perpendicular", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] Example 1:

[0041] See also Figures 1-4 The embodiment of the present invention discloses a residual dust separation device, comprising: a silo body 1, a pushing mechanism 3, a screen 4 and a residual dust discharge assembly 5;

[0042] The silo body 1 comprises a rectangular cylindrical structure with an opening at one end and a mounting frame 2. The bottom of the rectangular cylindrical structure is provided with a dust outlet and a residual outlet 11 connected to its inner cavity in parallel along the direction of its opening for discharging dust and residual. The top is provided with a material inlet 12 connected to its inner cavity corresponding to the dust outlet for injecting residual dust mixed material.

[0043] The pushing mechanism 3 includes a driving mechanism 32 and a pushing assembly 31; the pushing assembly 31 is connected to the inner wall of the silo body 1 by reciprocating sliding along the direction of the dust outlet and the debris outlet 11, and is hinged to the output end of the driving mechanism 32; wherein, the pushing assembly 31 has an initial position and a compaction position, the initial position is that the feed port 12 is located between the pushing end of the pushing assembly 31 and the debris outlet 11; the compaction position is that the pushing end of the pushing assembly 31 is located above the debris outlet 11; the pushing assembly 31 pushes the debris dust mixture to move and separate it during the reciprocating sliding process, and at the same time can also compact the debris in the space above the debris outlet 11 to reduce the volume of the debris.

[0044] The screen 4 is installed in the dust outlet to separate the dust; during use, the mesh size of the screen 4 can be customized according to the type of feed material, so that the dust can be separated from the screen 4 during the pushing process, thereby achieving the purpose of separating the residue from the dust.

[0045] The debris unloading assembly 5 is installed below the debris outlet 11 and is used to unload the compacted debris.

[0046] Specifically, the driving mechanism 32 includes a driving motor 321, a driving shaft 322, a rotating disk 323, a driven shaft 324 and a connecting rod 325; the driving motor 321 is fixed on the mounting frame 2; the driving shaft 322 is arranged in a direction perpendicular to the dust outlet and the residual outlet 11 and one end is fixedly connected to the output shaft of the driving motor 321; the center of the disk surface of the rotating disk 323 is fixed to the other end of the driving shaft 322; the driven shaft 324 is arranged parallel to the driving shaft 322 and one end is fixed on the disk surface of the rotating disk 323 on the outer peripheral side of the driving shaft 322; one end of the connecting rod 325 is rotatably connected to the other end of the driven shaft 324, and the other end is hinged to the pushing assembly 31. The driving motor 321 adopts a reduction motor, which drives the driving shaft 322 to rotate, and then drives the rotating disk 323 to rotate. The rotating disk 323 drives the driven shaft 324 to rotate with the driving shaft 322 as the center. The driven shaft 324 drives the connecting rod 325 to push the pushing assembly 31 to slide back and forth in the silo body 1, thereby promoting the movement and separation of the mixed material of the residual dust and compressing the separated residual materials to reduce the volume of the residual materials for easy transportation.

[0047] Specifically, the pushing assembly 31 includes a side push plate 311 and a lower scraper 312. The side push plate 311 is arranged along the direction perpendicular to the dust outlet and the debris outlet 11, and its two sides are connected to the inner wall of the silo body 1 through the second slide rail 8 in a sliding manner along the direction of the dust outlet and the debris outlet 11. The plate surface close to the debris outlet 11 is the pushing end; the lower scraper 312 is arranged perpendicular to or parallel to the side push plate 311 and is fixed to the bottom of the side push plate 311, and the scraping end at the bottom slides against the top surface of the screen 4; the end of the connecting rod 325 away from the driven shaft 324 is hinged to the center of the side push plate 311. The side push plate 311 is mainly used to push the mixed material to move, so that the dust is screened out through the screen 4 during movement and the debris is compacted. The lower scraper 312 prevents the material on the screen 4 from being brought back in the reverse direction. Figure 3-4 As shown, one end of the lower scraper 312 is fixed to the bottom of the side push plate 311, and the other end extends toward the direction close to the connecting rod 325. The bottom surface of the lower scraper 312 is the scraping end, and when the pushing assembly 31 moves to the compacting position, the length of the lower scraper 312 is greater than the length of the screen 4, preventing the remaining dust that has not been screened out of the top of the screen 4 from being carried out to the outside of the silo body 1 when the lower scraper 312 moves in the reverse direction.

[0048] Specifically, it also includes a dust box 6, the top of the dust box 6 is open and the open end thereof is detachably mounted on the bottom of the screen 4, for collecting fallen dust to avoid polluting the surrounding environment.

[0049] More specifically, two first slide rails 7 arranged in parallel are fixed to the bottom of the screen 4, and the slide strips 61 formed by the flanges on both sides of the top open end of the dust box 6 slide with the two first slide rails 7. The dust box 6 can be disassembled by pulling and sliding, making it convenient to pour out the collected dust.

[0050] Specifically, the debris unloading assembly 5 includes a lever 51, a discharge plate 52 and a counterweight 53. The middle part of the lever 51 is hinged at the bottom of the debris outlet 11. The discharge plate 52 and the counterweight 53 are respectively fixed at both ends of the lever 51. The discharge plate 52 can block or open the debris outlet 11. When the weight of the compacted debris exceeds the weight of the counterweight 53, the discharge plate 52 automatically opens to discharge the compacted debris, and the compacted debris can be transported to a designated location through the conveying device under the discharge plate 52 for subsequent recycling.

[0051] Example 2:

[0052] This embodiment is an improvement on the first embodiment. The pusher assembly 31 further includes an upper baffle 313. The upper baffle 313 is fixed to the top of the side pusher 311 in the direction of the dust outlet and the residual material outlet 11, and is slidably connected to the inner top wall of the silo body 1 in the direction of the dust outlet and the residual material outlet 11. During use, the upper baffle 313 can be slid to block or open the feed inlet 12 to stop or start feeding.

[0053] In a specific embodiment, the pusher assembly 31 also includes two side support plates, which are respectively fixed on both sides of the upper baffle 313 and the lower scraper 312 to form a rectangular cylindrical structure with one end open. The support of the upper baffle 313 and the lower scraper 312 is strengthened by the side support plates, making the pusher assembly 31 more solid as a whole.

[0054] like Figure 5-Figure 7 In this embodiment, the pusher assembly 31 is a rectangular cylindrical structure with one end open. The lower scraper 312 is arranged perpendicular to the side pusher 311, and the upper baffle 313 is the same size as the lower scraper 312. The feed opening 12 is a circular hole. To ensure that the mixed material falls only into the cavity between the pusher assembly 31 and the closed end of the rectangular cylindrical structure, the pusher assembly 31 must be able to completely block the feed opening 12 during its movement toward the compaction position. Taking the feed opening 12 as a circular hole as an example, the relationship between the feed opening 12 and the pusher assembly 31 is:

[0055] d≤l and d≤w;

[0056] Wherein, d is the inner diameter of the feed port 12 (the length between points EF in the figure), l and w are the length (the length between the C wall and the D wall) and width (not shown in the figure) of the pusher assembly 31 respectively.

[0057] See also Figure 5 When the pusher assembly 31 is in the initial position, the feed port 12 is fully opened. Figure 6 When the pusher assembly 31 is in the compacting position, the feed inlet 12 is completely closed. The sliding distance of the pusher assembly 31 from the initial position to the compacting position should be greater than the inner diameter of the feed inlet 12. Therefore, the relationship between the drive mechanism 32 and the feed inlet 12 is:

[0058] r>d / 2

[0059] Wherein, r is the rotation radius of the driven shaft 324 (the length between two points OA), and d is the inner diameter of the feed port (12).

[0060] like Figure 7 FIG3 is a simplified structural diagram of the pusher assembly 31 when it is in the middle position. At this time, OA⊥OB. If the pusher assembly 31 is in the initial position, the open end of the pusher assembly 31 can slide outside the rectangular cylindrical structure. At this time, to ensure that the connecting rod 325 and the pusher assembly 31 do not interfere with each other during the movement, the following relationship exists between the pusher assembly 31 and the driving mechanism 32:

[0061] l <h / 2tan[arcsin(r / L)]

[0062] In the formula, l is the length of the pusher assembly 31 (the length between the C wall and the D wall), h is the height of the pusher assembly 31 (the length between the two points GH), r is the rotation radius of the driven shaft 324 (the length between the two points OA), and L is the length of the connecting rod 325 (the length between the two points AB).

[0063] Example 3:

[0064] This embodiment is an improvement on the basis of embodiment 2. The pushing assembly 31 can be a solid rectangular structure, and the connecting rod 325 is hinged on the end face of the pushing assembly 31 away from the residual outlet 11. However, when the pushing assembly 31 with a solid rectangular structure is used, the pushing assembly 31 is large in size and heavy in weight, and the driving force to push it to slide is greater, which increases energy consumption. In addition, when the same moving distance is met, the distance between the rotating disk 323 and the rectangular cylindrical structure will increase, thereby increasing the volume of the entire device. Therefore, this solution is generally not adopted.

[0065] Example 4:

[0066] A method for separating stray dust, using the stray dust separation device described in any one of Examples 1-3, comprises the following steps:

[0067] S1. The residual dust mixture to be separated is put into the inner cavity of the silo body 1 through the feed inlet 12;

[0068] S2. Use the driving mechanism 32 to drive the pushing assembly 31 to move from the initial position to the compacting position, so that the pushing assembly 31 pushes the mixed dust mixture to move. During the movement, the dust is screened out by the screen 4, and the mixed dust is pushed by the pushing assembly 31 to the space above the mixed dust outlet 11 for compaction;

[0069] S3. When the pushing assembly 31 moves to the compacting position, the driving mechanism 32 drives the pushing assembly 31 to move in the opposite direction back to the initial position, and the residual dust mixture can enter the inner cavity of the silo body 1 above the screen 4 through the feed port 12 again;

[0070] S4. Repeat steps 1 to 3 continuously. The pushing assembly 31 repeatedly pushes the mixture to sieve out the dust and repeatedly pushes the residue toward the residue outlet 11. The residue gradually accumulates and is compacted in the space above the residue outlet 11.

[0071] S5. When the compacted debris reaches a certain weight, the debris unloading assembly 5 opens to discharge the compacted debris.

[0072] The present invention can not only separate debris and dust through the reciprocating sliding of the pushing component 31, but also repeatedly compact and shape the relatively fluffy debris, thereby reducing the volume of the debris, facilitating subsequent storage or transportation, and saving storage and transportation costs.

[0073] In the above steps, if the device of Example 1 is used, an intermittent feeding method needs to be adopted. The so-called intermittent feeding method means that the feeding amount or feeding time of the feeding mechanism can be pre-set in the system according to the structural dimensions of the device. During separation, the feeding mechanism is first turned on to inject the mixed material into the inner cavity of the silo body 1. The feeding is stopped after the feeding reaches the set amount or the set time. At this time, the driving mechanism 32 is turned on to make the pushing assembly 31 push the material to move for screening and compaction. After compaction, the pushing assembly 31 returns to the initial position, and the feeding mechanism starts feeding again. The above operation is repeated to achieve the separation of the residual dust and the residual compaction work.

[0074] When the device of Example 2 or Example 3 is used, an intermittent or continuous feeding method can be adopted. The so-called continuous feeding method refers to presetting the feeding amount and feeding speed according to the structural dimensions of the device. During separation, the feeding mechanism is turned on to allow it to feed slowly, and the drive mechanism 32 can be turned on synchronously. The reciprocating sliding of the pusher assembly 31 is used to automatically block or open the feed port to control the stopping and starting of the feeding. In this way, a sealing ring can be provided at the discharge end of the feed port 12 to seal and slide with the pusher assembly 31 to achieve blocking or opening of the feed port.

[0075] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0076] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for separating miscellaneous dust, characterized in that: include: A silo body (1), wherein a dust outlet and a residual material outlet (11) communicating with an inner cavity of the silo body (1) are provided in parallel at the bottom thereof, and an inlet (12) communicating with the inner cavity of the silo body (1) is provided at the top thereof corresponding to the dust outlet; A pushing mechanism (3), the pushing mechanism (3) comprising a driving mechanism (32) and a pushing assembly (31); the pushing assembly (31) is connected to the inner side wall of the silo body (1) in a reciprocating sliding manner along the direction of the dust outlet and the residual outlet (11), and is hinged to the output end of the driving mechanism (32); wherein the pushing assembly (31) has an initial position and a compacting position, the initial position being that the feed inlet (12) is located between the pushing end of the pushing assembly (31) and the residual outlet (11); the compacting position being that the pushing end of the pushing assembly (31) is located above the residual outlet (11); a screen (4), the screen (4) being installed in the dust outlet; A debris discharge assembly (5), the debris discharge assembly (5) is installed below the debris outlet (11).

2. The residual dust separation device according to claim 1, characterized in that: The driving mechanism (32) includes a driving motor (321), a driving shaft (322), a rotating disk (323), a driven shaft (324) and a connecting rod (325); the driving motor (321) is fixed on the side wall of the silo body (1); the driving shaft (322) is arranged in a direction perpendicular to the dust outlet and the residual outlet (11), and one end is fixedly connected to the output shaft of the driving motor (321); the center of the disk surface of the rotating disk (323) is fixed to the other end of the driving shaft (322); the driven shaft (324) is arranged parallel to the driving shaft (322), and one end is fixed to the disk surface of the rotating disk (323) on the outer peripheral side of the driving shaft (322); one end of the connecting rod (325) is rotatably connected to the other end of the driven shaft (324), and the other end is hinged to the pushing assembly (31).

3. The residual dust separation device according to claim 2, characterized in that: The pushing assembly (31) includes a side push plate (311) and a lower scraper (312), the side push plate (311) is arranged in a direction perpendicular to the dust outlet and the residual outlet (11), and is slidably connected to the inner wall of the silo body (1) along the direction of the dust outlet and the residual outlet (11); the lower scraper (312) is fixed to the bottom of the side push plate (311), and the scraping end at the bottom is slidably connected to the top surface of the screen (4); the end of the connecting rod (325) away from the driven shaft (324) is hinged to the side push plate (311).

4. The residual dust separation device according to claim 3, characterized in that: The pushing assembly (31) further includes an upper baffle (313), the surface of which is fixed to the top of the side pushing plate (311) along the direction of the dust outlet and the residual outlet (11), and is slidably connected to the inner top wall of the silo body (1) along the direction of the dust outlet and the residual outlet (11).

5. The residual dust separation device according to claim 1, characterized in that: It also includes a dust collecting box (6), the top of the dust collecting box (6) is open and the open end thereof is detachably mounted on the bottom of the screen (4).

6. The residual dust separation device according to claim 5, characterized in that: Two first slide rails (7) arranged in parallel are fixed to the bottom of the screen (4), and the slide bars (61) on both sides of the top opening end of the dust collecting box (6) are in sliding cooperation with the two first slide rails (7).

7. The residual dust separation device according to claim 1, characterized in that: The waste material unloading assembly (5) comprises a lever (51), a discharge plate (52) and a counterweight (53); the middle portion of the lever (51) is hinged to the bottom of the waste material outlet (11); the discharge plate (52) and the counterweight (53) are respectively fixed to both ends of the lever (51); and the discharge plate (52) can block or open the waste material outlet (11).

8. A method for separating stray dust, using the stray dust separation device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. The mixed dust to be separated is fed into the inner cavity of the silo body (1) through the feed inlet (12); S2. Using the driving mechanism (32) to drive the pushing assembly (31) to move from the initial position to the compacting position, so as to push the mixed dust mixture to move through the pushing assembly (31). During the movement, the dust is screened out through the screen (4), and the mixed dust is pushed by the pushing assembly (31) to the space above the mixed dust outlet (11) for compaction; S3. When the pushing assembly (31) moves to the compacting position, the driving mechanism (32) drives the pushing assembly (31) to move in the reverse direction back to the initial position, and the residual dust mixture can enter the inner cavity of the silo body (1) above the screen (4) through the feed inlet (12) again; S4, continuously repeating steps 1 to 3, the pushing component (31) repeatedly pushes the mixture to sieve out the dust, and repeatedly pushes the residue to move toward the residue outlet (11), and the residue gradually accumulates and is compacted in the space above the residue outlet (11); S5. When the compacted debris reaches a certain weight, the debris unloading assembly (5) opens to discharge the compacted debris.

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