A double-layer seed cotton cleaning device and method for lower recovery

Abstract

The application provides a double-layer seed cotton cleaning device and method, and relates to the technical field of seed cotton cleaning machines. The device and method are used to solve the problem of a large amount of locked cotton caused by repeated cleaning and repeated beating of the current upper recovery type seed cotton cleaning machine. The problem is solved by setting a lower recovery component under an upper inclined cleaning component to effectively recover the effective fibers to the lower inclined cleaning component. The effective fibers and the seed cotton loosened by the lower inclined cleaning component are secondarily removed together, which avoids the problem of locked fibers caused by repeated cleaning and beating of the effective fibers at the recovery component position, effectively improves the cleaning efficiency and the quality of the seed cotton after removal, and improves the lint grade.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seed cotton cleaning machine, in particular to a double-layer seed cotton cleaning device and method with lower recovery. BACKGROUND

[0002] The seed cotton cleaning equipment is a mechanical equipment for cleaning impurities in cotton, which mainly removes seed cotton, leaves, branches and other impurities in cotton to improve the quality and purity of cotton. Common seed cotton cleaning equipment includes vibrating screen type cleaner, air flow type cleaner and drum type cleaner, etc. These devices are usually composed of feeding device, screen or air suction device, discharging device and transmission device, etc. During the operation of the equipment, the seed cotton enters the cleaner through the feeding device, is screened and separated by the screen or air suction device, and is discharged by the discharging device after removing impurities. The transmission device is responsible for driving the operation of the entire cleaner.

[0003] The drum type cleaner has high cleaning precision and can reduce the impurity content in seed cotton through multiple cleaning. The cleaning efficiency of the seed cotton cleaning equipment is also required to be higher and higher. At present, most of the seed cotton cleaning machines on the market adopt the upper recovery mode. A double-layer grading type seed cotton cleaning machine is disclosed in Chinese patent (publication number CN206109604U), which can adapt to the cleaning process of seed cotton with different impurity contents by selecting double-layer or single-layer. However, after the first-stage cleaning and impurity removal, the mixture of effective fibers and impurities is recovered in an upper recovery mode, and the effective fibers are repeatedly transported to the first-stage cleaning position, resulting in the continuous circulation of effective fibers at the first-stage cleaning position and the recovery position, and the problems of repeated cleaning and repeated impact of single seed cotton and effective fibers, which causes a large amount of locked lint and cannot effectively improve the lint grade. In addition, there are problems of low cleaning efficiency of the recovery part, easy cotton leakage, small flower head falling and other adverse phenomena, which causes seed cotton loss. SUMMARY

[0004] The present application aims to solve the defects of the prior art by providing a double-layer seed cotton cleaning device and method with lower recovery, which solves the problem by setting a lower recovery component under the upper inclined cleaning component to recover the effective fibers to the lower inclined cleaning component. The effective fibers and the loosened seed cotton of the lower inclined cleaning component are secondarily removed together, which avoids the problem of locked lint caused by repeated cleaning and impact of effective fibers at the recovery component position, effectively improves the cleaning efficiency and the quality of the removed seed cotton, and improves the lint grade.

[0005] The first object of the present application is to provide a double-layer seed cotton cleaning device with lower recovery, which adopts the following scheme:

[0006] The device includes an inclined housing, which is divided into an upper and lower layer by an upward-flowing waste plate along the inclined direction of the housing. The upper and lower layers are each equipped with an inclined cleaning component. The top of the housing is equipped with an upper inlet that connects to the upper layer, and the top side of the lower inclined cleaning component is equipped with a cotton outlet. The bottom of the upper layer is equipped with a recovery component. The outer periphery of the recovery component forms a first part that receives the material output from the upward-flowing waste plate, a second part that discharges impurities from the material output from the upward-flowing waste plate, and a third part that recovers the effective fibers from the output material. A brush roller is provided between the third part and the lower inclined cleaning component. The brush roller grabs the effective fibers and puts them into the lower inclined cleaning component.

[0007] Furthermore, the recycling assembly includes a recycling roller and a removal screen; the removal screen is located below the recycling roller and is distributed in a semi-enclosed manner to form a second part; the first part, the second part, and the third part are distributed sequentially along the rotation direction of the recycling roller.

[0008] Furthermore, the recycling assembly also includes a squeezing brush located above the recycling roller, with an upper waste discharge outlet formed between the squeezing brush and the upper waste plate to access the first part of the outer periphery of the recycling assembly.

[0009] Furthermore, a lower baffle plate is provided between the brushing roller and the upper waste plate, and a recycling channel for effective fibers is formed between the lower baffle plate and the brushing roller, with the brushing roller and the recycling roller rotating in opposite directions.

[0010] Furthermore, an upper seed cotton running channel is formed above the upper inclined cleaning component, and an upper waste discharge channel is formed between the upper inclined cleaning component and the upper waste discharge plate, connecting to the first part; a lower waste discharge channel is formed between the lower inclined cleaning component and the lower waste discharge plate below it, and a lower seed cotton running channel is formed between the lower inclined cleaning component and the upper waste discharge plate, connecting to the third part.

[0011] Furthermore, the box body is provided with a lower cotton inlet that connects to the top of the lower cotton running channel, and the top of the upper inclined cleaning component's cotton discharge position connects to the top of the lower cotton running channel.

[0012] Furthermore, the inclined cleaning assembly includes a spiked roller and a grid, with a seed cotton impurity removal channel formed between the grid and the spiked roller. Multiple rows of spikes are arranged axially on the outer circumferential surface of the spiked roller, and the spikes in the same row are distributed in a herringbone staggered pattern along the outer circumferential surface.

[0013] Furthermore, the grid includes a positioning plate and triangular grid strips. A positioning groove with an isosceles side is formed on the positioning plate. The isosceles side of the triangular grid strip fits into the isosceles side of the positioning groove. The bottom edge of the triangular grid strip is fixed to the positioning plate.

[0014] A second objective of this invention is to provide a method for operating the lower-recovery double-layer seed cotton cleaning device as described in the first objective, comprising:

[0015] The seed cotton enters the box through the upper inlet, and is loosened and separated by the upper inclined cleaning component. The impurities are then fed into the recycling component via the upper impurity plate, and the seed cotton after impurity removal enters the top of the lower inclined cleaning component.

[0016] The second part of the recycling component removes impurities from the waste material and conveys the effective fibers to the brush roller, which then conveys them to the bottom of the lower inclined cleaning component.

[0017] After impurity removal, the seed cotton is loosened by the lower inclined cleaning component and mixed with effective fibers for secondary impurity removal. Impurities are discharged outside the box, and the seed cotton after impurity removal is discharged through the cotton outlet.

[0018] Furthermore, the gap between the grid bars for impurity removal corresponding to the upper inclined cleaning component is larger than the gap between the grid bars for impurity removal corresponding to the lower inclined cleaning component, so that the seed cotton is discharged after two conveying processes and two impurity removal processes.

[0019] Compared with the prior art, the advantages and positive effects of this invention are:

[0020] (1) To address the problem of excessive fiber lock caused by repeated cleaning and impact in the current upper-level seed cotton cleaning machine, a lower recycling component is set below the upper-level inclined cleaning component to recover the effective fibers to the lower-level inclined cleaning component. The effective fibers are mixed with the seed cotton loosened by the lower-level inclined cleaning component for secondary impurity removal, avoiding the problem of fiber lock caused by repeated cleaning and impact at the recycling component position. This effectively improves the cleaning efficiency and the quality of the seed cotton after impurity removal, and improves the grade of lint.

[0021] (2) The double inlet is adopted. The seed cotton to be cleaned can enter the box through the upper inlet and be cleaned twice by the upper inclined cleaning component and the lower inclined cleaning component. The seed cotton to be cleaned can also enter the box through the lower inlet and be cleaned once by the lower inclined cleaning component, so as to meet the cleaning needs of seed cotton with different impurity rates and impurity types and improve its applicability.

[0022] (3) The spikes on the spike roller are arranged in a herringbone pattern, which will not cause local repeated impacts, reduce damage to the raw cotton, and make the impact on the seed cotton more thorough, thus enabling more effective control of the seed cotton and improving the impurity removal efficiency.

[0023] (4) The combination of triangular grid strips and positioning plates is adopted. The positioning plates can help support and position the triangular grid strips, which solves the problem that the round steel grid strips are easy to deform and the interval distance is inconvenient to control. It can reduce the bad phenomena of easy cotton leakage and small flower heads falling off, and reduce seed cotton loss. Attached Figure Description

[0024] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0025] Figure 1 This is a schematic diagram of the lower recovery double-layer seed cotton cleaning device in Embodiments 1 and 2 of the present invention.

[0026] Figure 2 This is a schematic diagram of the spike roller structure in Embodiments 1 and 2 of the present invention.

[0027] Figure 3 This is a schematic diagram of the grid in Embodiments 1 and 2 of the present invention.

[0028] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0029] Among them, 1. Upper cotton blocking plate; 2. Spike roller; 3. Upper grid strip; 4. Upper waste removal plate; 5. Upper cotton guiding plate; 6. Wire brush; 7. Cotton lifting plate; 8. U-shaped toothed roller; 9. Impurity removal screen; 10. Cotton brushing roller; 11. Impurity removal auger; 12. Lower cotton guiding plate; 13. Lower cotton blocking plate; 14. Lower waste removal plate; 15. Frame section; 16. Lower grid strip; 17. Lower cotton blocking plate; 18. Spike; 19. Positioning plate; 20. Triangular grid strip; 21. Bottom edge.

[0030] A. Upper cotton inlet; B. Lower cotton inlet; C. Cotton outlet; D. Upper seed cotton running channel; E. Upper impurity discharge channel; F. Lower seed cotton running channel; G. Lower impurity discharge channel. Detailed Implementation

[0031] Example 1

[0032] In a typical embodiment of the present invention, such as Figures 1-4 As shown, a bottom-recovery double-layer seed cotton cleaning device is presented.

[0033] Most current seed cotton cleaning machines use an upward recovery method to process the effective fibers recovered after impurity removal. The upward recovery method will return some small cotton bolls, single cotton grains, and free fibers that have fallen off the primary cleaning position to the primary cleaning position. However, the grid corresponding to the primary cleaning position is a large-gap grid, which causes some small cotton bolls, single cotton grains, and free fibers to fall back to the recovery position. This cycle between the recovery position and the primary cleaning position continues, and some single cotton grains and effective fibers are repeatedly cleaned and repeatedly impacted, resulting in a large amount of lint and affecting the quality and grade of the subsequent cotton lint.

[0034] Based on this, this embodiment provides a bottom-recovery double-layer seed cotton cleaning device, which solves the problems of the top-recovery method by adopting the "bottom-recovery" method. The structure of the recovery component is changed so that the recovery component forms multiple partitions, and the downstream of the impurity removal position of the recovery component is used as the recovery area. The brush roller 10 is used to grab some small cotton buds, single seed cotton, free fibers and other effective fibers and put them into the lower inclined cleaning component. The small gap grid of the lower layer is used to control the impurity removal process, ensuring the reasonable collection of some small cotton buds, single seed cotton, free fibers and other effective fibers.

[0035] The following is a detailed description of the double-layer seed cotton cleaning device for lower recycling, with reference to the accompanying drawings.

[0036] See Figure 1 The double-layer seed cotton cleaning device mainly includes a box, an inclined cleaning component, a recycling component, and a brush roller 10. The box is inclined and installed on the frame 15. Inside, there is an upper impurity plate 3 arranged along the inclined direction of the box, dividing the inside of the box into an upper layer above the upper impurity plate 3 and a lower layer below the upper impurity plate 3. Inclined cleaning components are installed in the upper and lower layers respectively. The box has an upper inlet A that connects to the upper space, which is used to put seed cotton into the upper layer for cleaning by the upper inclined cleaning component. The lower end of the upper inclined cleaning component is connected to the recycling component, which can receive the mixture of effective fibers and impurities discharged from the lower impurity plate 14. After separating the effective fibers, it is conveyed to the brush roller 10. The brush roller 10 puts the grasped effective fibers into the lower inclined cleaning component, and after mixing with the seed cotton conveyed by the lower inclined cleaning component, it performs secondary impurity removal cleaning. The top side of the lower inclined cleaning component has a cotton outlet C for discharging the impurity-removed seed cotton.

[0037] like Figure 1 As shown, the upper inlet A is located at the top of the box and connects to the upper layer, while the recycling component is located at the bottom of the upper layer. Specifically, in this embodiment, the circumference of the recycling component is divided for explanation. The outer periphery of the recycling component forms a first part that receives the material output from the upper impurity plate 3, a second part that discharges impurities from the material output from the upper impurity plate 3, and a third part that recovers the effective fibers from the output material.

[0038] For the first part, the recycling assembly also includes a squeezing brush located above the recycling roller, with the squeezing brush and the upper waste plate 3 forming an upper waste discharge outlet to access the first part of the outer periphery of the recycling assembly.

[0039] For the second part, the recycling components include a recycling roller and a cleaning screen 9, such as... Figure 1 As shown, the impurity removal screen 9 is located below the recovery roller and is distributed in a semi-enclosed manner, forming the second part.

[0040] For the third part, a brush roller 10 is provided between the third part and the lower inclined cleaning assembly. The brush roller 10 grabs the effective fibers and puts them into the lower inclined cleaning assembly. A lower baffle plate 13 is provided between the brush roller 10 and the upper waste plate 3. The lower baffle plate 13 and the brush roller 10 form a recycling channel for the effective fibers to pass through. The brush roller 10 and the recycling roller rotate in opposite directions to facilitate the brush roller 10 grabbing the effective fibers from the recycling roller.

[0041] In this embodiment, the first part, the second part, and the third part are distributed sequentially along the rotation direction of the recovery roller, thereby corresponding to the process of receiving the mixed material, rolling to remove impurities, and outputting effective fibers.

[0042] In this embodiment, the recovery roller is a U-shaped toothed roller 8, and the squeezing brush is a wire brush 6. The wire brush 6 is a double-row wire brush 6, with one row vertical and the other inclined, and the ends cross together. In this embodiment, the double-row wire brush 6 fits more tightly and seals better against the U-shaped toothed roller 8, resulting in a longer service life. It also prevents the loss of small cotton fibers and effectively freed fibers due to wear or missing wires in certain areas, thus reducing cotton waste.

[0043] A cotton-lifting plate 7 is also provided between the wire brush 6 and the impurity removal screen 9. The cotton-lifting plate 7 can be adjusted up and down or left and right. The position of the cotton-lifting plate 7 is adjusted according to the impurity content and physical form of the material falling from the upper layer to prevent small lint and effective fibers from falling off.

[0044] Regarding the distribution of the overall structure, such as Figure 1 As shown, an upper seed cotton running channel D is formed above the upper inclined cleaning component, and an upper waste discharge channel E is formed between the upper inclined cleaning component and the upper waste discharge plate 3, connecting the first part; a lower waste discharge channel is formed between the lower inclined cleaning component and the lower waste discharge plate 14 set below it, and a lower seed cotton running channel F is formed between the lower inclined cleaning component and the upper waste discharge plate 3, connecting the third part; at the same time, a lower waste discharge channel G is formed between the lower inclined cleaning component and the lower waste discharge plate 14.

[0045] The box is equipped with a lower cotton inlet B that connects to the top of the lower cotton running channel F, and the upper inclined cleaning component's top cotton discharge position connects to the top of the lower cotton running channel F.

[0046] In this embodiment, both the upper cotton inlet A and the lower cotton inlet B are horizontally arranged. The upper cotton running channel D and the lower cotton running channel F are connected to each other. The upper cotton inlet A is located above the upper cotton running channel D, and the lower cotton inlet B is located above the lower cotton running channel F.

[0047] In addition, the lower part of the box forms a space to receive impurities. The bottom of the box is equipped with a auger 11 assembly to receive impurities discharged from the recycling assembly and the lower inclined cleaning assembly, and discharge them outside the box.

[0048] like Figures 2-4 As shown, the inclined cleaning assembly has multiple cleaning mechanisms, each including a spiked roller 2 and a grid. Figure 1 As shown, the upper inclined cleaning assembly includes six cleaning mechanisms, and the lower inclined cleaning assembly also includes six cleaning mechanisms.

[0049] A seed cotton impurity removal channel is formed between the grid and the spiked roller 2. Multiple rows of spikes 18 are provided on the outer circumference of the spiked roller 2 along the axial direction. The spikes 18 in the same row are distributed in a herringbone staggered pattern along the outer circumference of the roller.

[0050] The grid includes a positioning plate and triangular grid strips 20. A positioning groove with an isosceles side is formed on the positioning plate. The isosceles side of the triangular grid strip 20 fits against the isosceles side of the positioning groove. The bottom edge 21 of the triangular grid strip 20 is fixed to the positioning plate.

[0051] It should be noted that, in the grid corresponding to the upper and lower inclined cleaning components, the spacing between adjacent triangular grids 20 of the upper inclined cleaning component is larger than that of the adjacent triangular grids 20 of the lower inclined cleaning component.

[0052] like Figure 2 As shown, the spiked roller 2 includes a roller and spikes 18 arranged in a herringbone pattern connected to its outer circumference. The roller is connected to a rotating shaft at both ends to facilitate its installation onto a bearing seat. The spikes 18 are welded to the roller in a uniform and regular herringbone pattern.

[0053] The axial spacing of the spikes 18 on the roller is 40 mm-80 mm; the circumferential spacing between adjacent rows of spikes 18 is 70 mm-110 mm; and the axial spacing between adjacent rows of spikes 18 is 14 mm-28 mm. The circumferential arrangement of the spikes 18 in a herringbone pattern prevents localized repeated impacts, reduces damage to the raw cotton, and ensures more even and thorough impact on the seed cotton. This allows for more effective control of the seed cotton and improves impurity removal efficiency.

[0054] like Figure 3 and Figure 4 As shown, the triangular grid has a high cleaning coefficient, which improves the cleaning efficiency of the cotton cleaning machine. The triangular grid 20 has an isosceles triangular cross-section, with its two isosceles sides in close contact with the two isosceles sides of the positioning groove of the isosceles triangle. The base 21 of the triangular grid 20 has a clearance fit with the base 21 of the positioning groove of the isosceles triangle. After the triangular grid 20 is positioned, it is welded and fixed to the base 21. This ensures both convenient installation and strength of the triangular steel grid, and guarantees consistent spacing between all grids. This solves the problems of round steel grids being prone to deformation, inconsistent spacing, and easy cotton leakage and small cotton particles falling off, resulting in cotton loss.

[0055] The angle between the two isosceles base angles of the positioning groove of the isosceles triangle is 45°-60°, and specifically, the angle between the two isosceles base angles can be 52.5°.

[0056] The triangular grid strips 20 employ a two-equal-sqrtion positioning method, effectively ensuring consistent spacing between all grid strips. Furthermore, the high bending section modulus of the triangular steel guarantees high strength and prevents deformation, thus avoiding cotton loss.

[0057] Example 2

[0058] In another typical embodiment of the present invention, such as Figures 1-4 As shown, a working method for a double-layer seed cotton cleaning device for lower recycling is presented.

[0059] The following steps are included when using the double-layer seed cotton cleaning device as described in Example 1:

[0060] Seed cotton enters the box through the upper inlet A. After being loosened and separated by the upper inclined cleaning component, the impurities are separated. The impurities enter the recycling component through the upper impurity plate 3. The seed cotton after impurity removal enters the top of the lower inclined cleaning component.

[0061] The second part of the recycling component discharges impurities from the impurity material and conveys the effective fibers to the brush roller 10, which then conveys them to the bottom of the lower inclined cleaning component.

[0062] After impurity removal, the seed cotton is loosened by the lower inclined cleaning component and mixed with effective fibers for secondary impurity removal. Impurities are discharged outside the box, and the seed cotton after impurity removal is discharged through the cotton outlet C.

[0063] The gap between the grid bars for impurity removal in the upper inclined cleaning component is larger than the gap between the grid bars for impurity removal in the lower inclined cleaning component. The seed cotton is discharged after two conveying processes and two impurity removal processes.

[0064] In this embodiment, combined with Figures 1-4 The above working methods will be explained in detail.

[0065] As shown in the figure, the seed cotton falls freely from the upper inlet A to the top of the first spiked roller 2. Due to the high-speed rotation of the spiked roller 2, the seed cotton clump is loosened by the first spiked roller 2 and moves to the lower left along the perpendicular tangent of the line connecting the center line of the first spiked roller 2 and the center line of the upper inlet A. The seed cotton is thrown by the first spiked roller 2 to the second spiked roller 2. The above action is repeated, and the seed cotton is thrown to the third, fourth, fifth and sixth spiked rollers 2. When it is thrown to the sixth spiked roller 2, the seed cotton is carried along the upper cotton guide plate 6 into the cleaning channel of the upper grid 3 by the spiked roller 2.

[0066] The spikes 18 penetrate deep into the cotton seed ball, hooking and striking it, thus breaking down and loosening the internal cohesion. As the spike roller 2 rotates, the cotton seed ball rotates and rubs against the surface of the upper large-gap grid screen 3 while moving forward along the screen. Impurities such as infertile seeds, boll husks, cotton stalks, leaf debris, and dust, as well as some small cotton bolls, single cotton seeds, and free fibers, are continuously screened out. Next, the seed cotton is thrown by the sixth spiked roller 2 to the fifth spiked roller 2, and the above action is repeated. It is then thrown to the fourth, third, second, and first spiked rollers 2. When the seed cotton moves to the large-gap triangular steel upper grid 3 screen below the first spiked roller 2, it is thrown out along the tangential direction of the upper grid 3. The upper cotton blocking plate 1 can prevent the seed cotton from being carried back to the upper seed cotton running channel D. It slides down along the lower cotton blocking plate 17 under gravity to the top of the first spiked roller 2 in the lower layer and enters the lower cleaning cycle.

[0067] The impurities such as infertile seeds, boll husks, cotton stalks, leaf debris, and dust that fall from the upper layers, as well as some small flower heads, single seed cotton, and free fibers, all enter the recycling component along the upper impurity plate 3. The high-speed rotating U-shaped toothed roller 8 hooks and grabs the single seed cotton and other effective fibers. They are first brushed and tightened by the wire brush 6. Under the action of centrifugal force and the obstruction of the impurity removal screen 9, the impurities are separated from the U-shaped toothed roller 8. The clean effective fibers after impurity removal rotate together with the U-shaped toothed roller 8 and are brushed off at the cotton brushing roller 10. They enter the bottommost spiked roller 2 of the lower layer, mix with the seed cotton cleaned from the upper layer, and then enter the cleaning channel of the lower grid 16.

[0068] The seed cotton discharged from the upper layer slides down the lower cotton-blocking plate 17 under gravity, above the first spiked roller 2 of the lower layer, and falls into the lower layer. Because the lower layer is equipped with a grid structure with small gaps, impurities are discharged without small cotton fibers falling off. The seed cotton discharged from the upper layer is thrown by the first spiked roller 2 of the lower layer to the second spiked roller 2. The above action is repeated, and it is thrown to the third, fourth, fifth, and sixth spiked rollers 2. When it is thrown to the sixth spiked roller 2 of the lower layer, the seed cotton mixes with the effective fibers cleaned by the recovery section along the lower cotton-blocking plate 13 and the lower cotton-following plate 12. Then, a piece is carried by the spiked roller 2 into the cleaning channel of the lower grid 16. Next, the seed cotton is thrown from the sixth spiked roller 2 to the fifth spiked roller 2 in the lower layer. The above action is repeated, and it is thrown to the fourth, third, second and first spiked rollers 2. When the seed cotton moves to the small gap triangular steel lower grid 16 screen below the first spiked roller 2 in the lower layer, it is thrown out along the tangent direction of the lower grid 16 and enters the next process along the cotton outlet C by gravity.

[0069] Impurities discharged from the recovery components and from the lower layer are discharged outside the machine by the impurity discharge auger 11.

[0070] The system features a dual inlet design. Seed cotton to be cleaned can enter the box through the upper inlet A and undergo two cleaning processes: one with an upper inclined cleaning component and the other with a lower inclined cleaning component. Alternatively, seed cotton can enter the box through the lower inlet B and undergo a single cleaning process with the lower inclined cleaning component. This design meets the cleaning needs of seed cotton with different impurity levels and types, thus improving its applicability.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A lower recovery double-layer seed cotton cleaning device, characterized in that, The box body is provided with an upper layer and a lower layer separated by an upper layer strainer in the tilting direction of the box body, and the upper layer and the lower layer are respectively provided with a tilting cleaning assembly; the top end of the box body is provided with an upper layer inlet opening communicating with the upper layer; the top end of the lower layer tilting cleaning assembly is provided with a cotton outlet opening; the bottom end of the upper layer is provided with a recovery assembly; the outer periphery of the recovery assembly forms a first part for receiving the output material of the upper layer strainer, a second part for discharging the impurities in the output material of the upper layer strainer, and a third part for recovering the effective fibers in the output material; a cotton brushing roller is arranged between the third part and the lower layer tilting cleaning assembly; the cotton brushing roller picks up the effective fibers and feeds them to the lower layer tilting cleaning assembly; a lower cotton blocking plate is arranged between the cotton brushing roller and the upper layer strainer; the lower cotton blocking plate and the cotton brushing roller form a recovery channel for the effective fibers to pass through; and the cotton brushing roller and the recovery roller rotate in opposite directions.

2. The lower recycling double-layer seed cotton cleaning device according to claim 1, characterized in that, The recovery assembly comprises a recovery roller and a decontamination screen; the decontamination screen is arranged below the recovery roller and is distributed in a semi-enclosing manner to form the second part; and the first part, the second part and the third part are sequentially arranged in the rotation direction of the recovery roller.

3. The lower recycling double-layer seed cotton cleaning device according to claim 2, characterized in that, The recovery assembly further comprises a tightness brushing roller arranged above the recovery roller; the tightness brushing roller and the upper layer strainer form an upper layer impurity discharge outlet to access the first part of the outer periphery of the recovery assembly.

4. The lower recycling double-layer seed cotton cleaning device of claim 1, wherein, The upper layer of the upper layer tilting cleaning assembly forms an upper layer seed cotton running channel above and an upper layer impurity discharge channel below the upper layer strainer, which communicates with the first part; the lower layer tilting cleaning assembly and the lower layer strainer arranged below form a lower layer impurity discharge channel; the lower layer tilting cleaning assembly and the upper layer strainer form a lower layer seed cotton running channel, which communicates with the third part.

5. The lower reclaiming double-layer seed cotton cleaning device according to claim 4, characterized in that, The box body is provided with a lower layer inlet opening communicating with the top end of the lower layer seed cotton running channel; and the top end of the seed cotton discharge position of the upper layer tilting cleaning assembly communicates with the top end of the lower layer seed cotton running channel.

6. The lower reclaiming double-layer seed cotton cleaning device according to claim 1, characterized in that, The tilting cleaning assembly comprises a spike roller and a lattice grid; the lattice grid and the spike roller form a seed cotton decontamination channel; the outer circumferential surface of the spike roller is provided with a plurality of spike columns in the axial direction; and the spikes in the same column are distributed in a herringbone shape in the circumferential direction of the outer circumferential surface.

7. The lower recycling double-layer seed cotton cleaning device of claim 6, wherein, The lattice grid comprises a positioning plate and a triangular lattice; the positioning plate forms a positioning groove with an isosceles side; the isosceles side of the triangular lattice is fitted with the isosceles side of the positioning groove; and the bottom side of the triangular lattice is fixed to the positioning plate.

8. A method of operating a double-layer seed cotton cleaning device according to any one of claims 1-7, characterized in that, The seed cotton enters the box body through the upper layer inlet opening, is loosened by the upper layer tilting cleaning assembly, and separates the impurity material; the impurity material enters the recovery assembly through the upper layer strainer; the seed cotton after decontamination enters the top end of the lower layer tilting cleaning assembly; The second part of the recovery assembly discharges the impurities in the impurity material and transports the effective fibers to the cotton brushing roller, which transports the effective fibers to the bottom end of the lower layer tilting cleaning assembly; The seed cotton after decontamination is loosened by the lower layer tilting cleaning assembly and mixed with the effective fibers to be decontaminated again by the lower layer tilting cleaning assembly; the impurities are discharged outside the box body; and the seed cotton after decontamination is discharged through the cotton outlet opening. The clearance of the lattice grid corresponding to the upper layer tilting cleaning assembly is greater than the clearance of the lattice grid corresponding to the lower layer tilting cleaning assembly; and the seed cotton is discharged after two times of transportation and decontamination.

9. The method of claim 8, wherein the double-layer seed cotton cleaning device is recovered. ​

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