Screening device and method for removing foreign matters in recycled down feather

Abstract

The invention relates to a screening device and method for removing foreign matter in recycled down feather. The problems that in the prior art, linkage among all working procedures of down feather recycling equipment is poor, the automation degree is low, and foreign matter of recycled down feather is difficult to efficiently remove are solved. The device comprises a hoisting frame body, a rotation driving structure is arranged on the hoisting frame body, the output end of the rotation driving structure is in threaded connection with a primary screening barrel, the output end of the rotation driving structure is located on the lower side of the primary screening barrel and connected with a screening barrel, and a screen structure and a rotary scraping and selecting assembly are sequentially arranged on the inner side of the screening barrel; the output end of the rotary driving structure is in linkage connection with a spiral feeding mechanism located in the screening barrel, the spiral feeding mechanism communicates with the rotary scraping and selecting assembly, and a discharging barrel communicating with the spiral feeding mechanism is arranged at the bottom of the screening barrel. The down feather conveying device has the advantages that the down feather conveying stability is improved, filtering and dust removing treatment can be conducted in the conveying process, and then the processing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment technology, and specifically to a screening device and method for removing foreign matter from recycled down feathers. Background Technology

[0002] Down jackets, as a type of winter clothing, are becoming increasingly popular. Compared to ordinary clothing, down jackets are lightweight, soft, and have good warmth retention. However, this also means that the requirements for materials and manufacturing processes are more stringent than for ordinary clothing, resulting in higher manufacturing costs. To reduce production costs and ensure corporate profits, many factories have begun to focus on the recycling of down.

[0003] Current down recycling requires screening and cleaning of down. Existing technologies do not integrate down screening and cleaning very well, and some small factories even use manual labor, resulting in low processing efficiency. In addition, existing down recycling equipment has poor linkage between processes, low automation, and difficulty in efficiently removing foreign matter from the recycled down, leading to foreign matter contamination during subsequent use and affecting processing quality.

[0004] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a recycling device for down production [CN201120522480.X], which includes a base, a support column fixedly connected to the middle of the base, an mounting plate fixedly connected to the top of the support column, a screening cylinder for screening down, a washing cylinder for washing down, and a drying cylinder for drying down fixedly connected to the upper surface of the mounting plate, an electric rotating rod fixedly connected to the middle of the mounting plate, a connecting block fixedly connected to the side wall of the electric rotating rod, and a transfer cylinder for transferring down fixedly connected to the side of the connecting block, the transfer cylinder being alternately connected to the screening cylinder, the washing cylinder, and the drying cylinder.

[0005] The above solution has solved the problem of low integration of down recycling equipment and its impact on processing efficiency in the existing technology to a certain extent. However, the solution still has many shortcomings, such as poor linkage between the various processes of down recycling equipment, low degree of automation, and difficulty in efficiently removing foreign objects from the recycled down. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned problems by providing a screening device and method for removing foreign matter from recycled down feathers.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a screening device for removing foreign objects from recycled down feathers, comprising a ring-shaped hoisting frame, a rotating drive structure on the hoisting frame, a primary screening cylinder threadedly connected to the output end of the rotating drive structure, a screening cylinder connected to the output end of the rotating drive structure and located below the primary screening cylinder, the primary screening cylinder being passively driven by the rotating drive structure and threadedly connected to the screening cylinder, a screen structure and a rotating scraping component being sequentially arranged inside the screening cylinder, and a spiral feeding mechanism located inside the screening cylinder being linked to the output end of the rotating drive structure, the spiral feeding mechanism and the rotating scraping component being interconnected, and a discharge cylinder interconnected with the spiral feeding structure being provided at the bottom of the screening cylinder.

[0008] In the screening device for removing foreign objects from recycled down feathers, the upper end of the primary screening cylinder is closed and the lower end is open. The lower end of the primary screening cylinder has a threaded connection part. The upper end of the screening cylinder is provided with a threaded connection seat corresponding to the threaded connection part. Several inclined dropping screens are arranged in an alternating pattern on the inner side of the primary screening cylinder. A barrier net for intercepting large-sized foreign objects is detachably installed on the lower end of the inner side of the primary screening cylinder.

[0009] In the aforementioned screening device for removing foreign objects from recycled down feathers, the rotary drive structure includes a rotary drive motor mounted on a hoisting frame. The output end of the rotary drive motor is connected to a threaded spool, which is threadedly connected to a primary screening cylinder. A flexible telescopic feed pipe is mounted on the upper end of the primary screening cylinder. A rotary clearance groove is provided on the hoisting frame, allowing the flexible telescopic feed pipe to be inserted and move circumferentially. An inlet cylinder, which communicates with the threaded spool, is provided between the threaded spool and the output end of the rotary drive motor. A guide pipe extending toward the rotary clearance groove is connected to one side of the inlet cylinder.

[0010] In the aforementioned screening device for removing foreign objects from recycled down, the screen structure includes a screening filter screen disposed on the inner circumferential side of the screening cylinder and located below the threaded connection seat. The screening filter screen has a clearance channel in the middle for the threaded tube to pass through. The lower end of the screening cylinder is connected to several scraping parts via a connecting frame. The scraping parts include an inner arc-shaped part and an outer arc-shaped part, which are staggered. When the initial screening cylinder descends and is threadedly connected to the screening cylinder and rotates in linkage, the bottom of the inner arc-shaped part and the outer arc-shaped part come into contact with the screening filter screen.

[0011] In the above-mentioned screening device for removing foreign objects from recycled down, the rotary scraping component includes a feed cylinder connected to and rotating in linkage with a threaded spool. The feed cylinder is circumferentially provided with a plurality of arc-shaped scraping cylinders. One end of the scraping part is provided with an arc-shaped receiving part and the other end is connected to the feed cylinder. The inner wall of the scraping part has a feeding area, and filter screens are provided on both the feeding area and the arc-shaped receiving part.

[0012] In the aforementioned screening device for removing foreign objects from recycled down feathers, the spiral feeding mechanism includes a spiral feeding bin connected to the lower end of the feeding cylinder. A spiral feeding seat is arranged from top to bottom inside the spiral feeding bin, and a discharge pipe is arranged at the bottom of the spiral feeding bin. The bottom of the discharge pipe is connected to the sewage outlet at the bottom of the screening cylinder through a rotating bearing. One end of the discharge cylinder is connected to the bottom of the spiral feeding seat, and the other end is connected to the discharge pipe arranged outside the screening cylinder.

[0013] In the aforementioned screening device for removing foreign objects from recycled down, a conical guide section is provided on the inner circumferential side of the screening cylinder and below the feeding cylinder. The screening cylinder is divided into a screening chamber and a drain chamber by the conical guide section. Several drain holes are arranged circumferentially on the conical guide section. The screening chamber is connected to the drain chamber through the drain holes. An annular heating module is provided on the outer circumferential side of the screening cylinder and at the drain chamber. A drain valve is provided at the drain outlet. A rinsing inlet hole is provided at the upper end of the screening cylinder.

[0014] A method of using a screening device includes the following steps: S1. Feed material is initially screened through the primary screening cylinder; S2. The primary screening cylinder and the screening cylinder are threadedly connected and synchronously linked by a rotating drive structure. S3. Screening and separation are carried out through the screen structure and rotating scraping component. The screened waste enters the sewage discharge chamber with the water flow, and the recovered down enters the screw feeding mechanism. S4. The spiral feeding mechanism conveys down and heats the water flow in the drain chamber through the annular heating module, thereby heating the spiral feeding bin to achieve down drying. S5. The dried down is discharged through the discharge cylinder, and the sewage and water from the spiral feed hopper are discharged through the drain outlet.

[0015] In step S1, the recycled down is introduced into the primary screening cylinder through a flexible telescopic feed pipe. The inclined drop screen and the blocking screen inside the primary screening cylinder are used to initially screen large-sized foreign objects. In step S2, the drive motor drives the threaded drum to rotate, the primary screening cylinder is passively lowered and threadedly connected to the screening cylinder, and the screening cylinder rotates synchronously. After the primary screening cylinder and the screening cylinder are threadedly connected, the bottom of the scraper part comes into contact with the screening filter screen. In step S3, when the screening cylinder rotates, the screen structure rotates synchronously, and the scraper part scrapes out large-sized foreign objects. Then, the down falls into the screening chamber, and water is injected into the screening chamber through the flushing inlet. The drive motor drives the feed cylinder to rotate, thereby driving the arc-shaped scraper to scrape the floating down into the feed cylinder and sink it into the spiral feeding bin, while the dirt is deposited at the bottom. After the scraping is completed, the drain hole is opened to guide the deposited dirt into the sewage discharge chamber.

[0016] In step S4, the annular heating module is heated by an external heating device to increase the temperature of the water flow in the sewage chamber, thereby indirectly drying the down in the screw feeder and separating the attached dirt. In step S, the dried down is sucked out by the negative pressure outside the discharge cylinder. After the sewage and the water flow of the screw feeder are discharged through the drain port, the water flow is introduced into the inlet cylinder through the guide pipe. The introduced water flow flows into the screw feeder machine through the threaded drum and the feed cylinder in sequence for rinsing. The rinsed water flow is discharged through the drain port.

[0017] Compared with the prior art, the advantages of this invention are as follows: Firstly, the rotating drive structure enables threaded connection and synchronous linkage between the primary screening cylinder and the screening cylinder, allowing for seamless integration of processes such as the inclined discharge screen, blocking screen, screening filter, scraper, arc-shaped scraper cylinder, spiral feeding, and annular heating and drying, significantly improving the linkage between processes. Secondly, the scraper automatically removes large-sized foreign objects, the arc-shaped scraper cylinder automatically selects down, the spiral feeding mechanism automatically transports down, and the annular heating module automatically dries and assists in separating attached contaminants. The dried down can also be automatically discharged through external negative pressure, resulting in a high degree of automation. Simultaneously, the primary screening intercepts large-sized foreign objects, the screen structure scrapes away residual large-sized impurities, the rotating scraper component separates down from contaminants, and the annular heating promotes the detachment of attached contaminants. Combined with water flushing and centralized waste discharge from the drainage chamber, a multi-level foreign object removal mechanism is formed, which can efficiently remove foreign objects from the recycled down, improving the purity and cleanliness of the recycled down. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the hoisting frame structure in this invention; Figure 4 This is a schematic diagram of the structure of the primary screening cylinder and the screening cylinder after separation in this invention; Figure 5 This is a schematic diagram of the structure when the scraping part of the present invention comes into contact with the screening filter screen; Figure 6 This is a schematic diagram of the rotating scraping assembly structure in this invention; Figure 7 This is a schematic diagram of the spiral feeder structure in this invention; In the diagram: 1. Lifting frame; 11. Rotation clearance channel; 2. Rotation drive structure; 21. Rotation drive motor; 22. Threaded drum; 23. Inlet cylinder; 24. Guide pipe; 3. Primary screening cylinder; 31. Threaded connection; 32. Inclined drop screen; 33. Barrier mesh; 34. Flexible telescopic feed pipe; 4. Screening cylinder; 41. Threaded connection seat; 42. Drainage port; 43. Discharge pipe; 44. Conical guide; 44. Drainage hole; 441. Screening chamber; 45. Drainage chamber; 46. 47. Annular heating module, 48. Drain valve, 49. Flushing inlet hole, 5. Screen structure, 51. Screening filter, 52. Clearance channel, 53. Connecting frame, 54. Scraper section, 541. Inner arc section, 542. Outer arc section, 6. Rotary scraping component, 61. Feeding cylinder, 62. Arc-shaped scraper cylinder, 63. Arc-shaped receiving section, 64. Feeding area, 7. Screw feeding mechanism, 71. Screw feeding bin, 72. Screw feeding seat, 73. Discharge pipe, 8. Discharge cylinder. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-7 As shown, a screening device for removing foreign objects from recycled down includes a ring-shaped hoisting frame 1, a rotating drive structure 2 on the hoisting frame 1, a primary screening cylinder 3 threadedly connected to the output end of the rotating drive structure 2, a screening cylinder 4 connected to the output end of the rotating drive structure 2 and located below the primary screening cylinder 3, and the primary screening cylinder 3 being passively driven by the rotating drive structure 2 and threadedly connected to the screening cylinder 4, a screen structure 5 and a rotating scraping component 6 sequentially arranged inside the screening cylinder 4, and a spiral feeding mechanism 7 located inside the screening cylinder 4 being linked to the output end of the rotating drive structure 2, the spiral feeding mechanism 7 and the rotating scraping component 6 being interconnected, and a discharge cylinder 8 connected to the spiral feeding structure at the bottom of the screening cylinder 4.

[0021] The primary screening cylinder 3 is closed at the top and open at the bottom, and has a threaded connection part 31 at the bottom. The screening cylinder 4 is provided with a threaded connection seat 41 corresponding to the threaded connection part 31 at the top. Several inclined material dropping screens 32 are arranged in a staggered manner on the inner side of the primary screening cylinder 3. A barrier net 33 for intercepting large foreign objects is detachably provided on the lower inner side of the primary screening cylinder 3.

[0022] The recycled down is introduced into the primary screening cylinder 3 through the flexible telescopic feed pipe 34. The staggered inclined drop screens 32 first disperse and filter the down, intercepting some medium-sized foreign objects. The detachable barrier net 33 at the lower end further intercepts large-sized foreign objects, preventing them from entering the subsequent fine screening process and reducing the risk of subsequent structural blockage.

[0023] As can be seen, the rotation drive structure 2 includes a rotation drive motor 21 mounted on the hoisting frame 1. The output end of the rotation drive motor 21 is connected to a threaded spool 22. The threaded spool 22 is threadedly connected to the primary screening cylinder 3. The upper end of the primary screening cylinder 3 is provided with a flexible telescopic feed pipe 34. The hoisting frame 1 is provided with a rotation clearance groove 11 that allows the flexible telescopic feed pipe 34 to be inserted and move circumferentially. An inlet cylinder 23 that communicates with the threaded spool 22 is provided between the threaded spool 22 and the output end of the rotation drive motor 21. A guide pipe 24 extending toward the rotation clearance groove 11 is connected to one side of the inlet cylinder 23.

[0024] The rotating clearance groove 11 provides circumferential movement space for the flexible telescopic feed pipe 34, ensuring that the feed is not obstructed when the primary screening cylinder 3 rotates, and that the flexible telescopic feed pipe 34 can freely extend and retract when the primary screening cylinder 3 is raised and lowered.

[0025] The rotating drive motor 21 drives the threaded drum 22 to rotate; since the threaded drum 22 is threadedly connected to the primary screening cylinder 3, the rotation of the threaded drum 22 will drive the primary screening cylinder 3 to passively descend until the threaded connection part 31 of the primary screening cylinder 3 is threadedly locked with the threaded connection seat 41 of the screening cylinder 4, thereby realizing the synchronous rotation of the primary screening cylinder 3 and the screening cylinder 4.

[0026] The inlet cylinder 23 and the extended guide pipe 24 between the threaded drum 22 and the motor are used to introduce water flow in the subsequent rinsing stage, providing a water path for cleaning the screw feeder 71.

[0027] Obviously, the screen structure 5 includes a screening filter 51 disposed on the inner side of the screening cylinder 4 and located below the threaded connection seat 41. The screening filter 51 has a clearance channel 52 in the middle for the threaded tube 22 to pass through. The lower end of the screening cylinder 4 is connected to a number of scraping parts 54 through the connecting frame 53. The scraping parts 54 include an inner arc-shaped part 541 and an outer arc-shaped part 542. The inner arc-shaped part 541 and the outer arc-shaped part 542 are staggered. When the initial screening cylinder 3 descends and is threadedly connected to the screening cylinder 4 and rotates in linkage, the bottom of the inner arc-shaped part 541 and the outer arc-shaped part 542 are in contact with the screening filter 51.

[0028] When the screen cylinder 3 and the screening cylinder 4 are locked together and rotate in linkage, the bottom of the inner arc-shaped part 541 and the outer arc-shaped part 542 contact the surface of the screening filter screen 51. As the cylinder rotates, it scrapes off the foreign objects attached to the filter screen, avoids the filter screen from clogging, and ensures that the screening is continuously effective.

[0029] Furthermore, the rotary scraping assembly 6 includes a feed cylinder 61 connected to and rotating in conjunction with the threaded drum 22. The feed cylinder 61 is provided with a plurality of arc-shaped scraping drums 62 around its circumference. One end of the scraping part 54 is provided with an arc-shaped receiving part 63 and the other end is connected to the feed cylinder 61. The inner wall of the scraping part 54 has a feeding area 64, and both the feeding area 64 and the arc-shaped receiving part 63 are provided with filter screens.

[0030] The feed cylinder 61 is connected to the threaded drum 22 and rotates synchronously with the threaded drum 22, serving as a collection and transfer chamber for down. The circumferential arc-shaped scraper 62 of the feed cylinder 61 rotates with the cylinder, scraping the pure down floating on the water surface in the screening chamber 45. The scraped down enters the scraper section 54 through the arc-shaped receiving part 63, and then enters the feed cylinder 61 through the other end of the scraper section 54.

[0031] The filter screens on the feeding area 64 on the inner wall of the scraping section 54 and the arc-shaped receiving section 63 can filter the dirt remaining in the down for a second time, ensuring the purity of the down entering the feeding cylinder 61.

[0032] Specifically, the screw feeding mechanism 7 includes a screw feeding bin 71 connected to the lower end of the feeding cylinder 61. A screw feeding seat 72 is arranged from top to bottom inside the screw feeding bin 71, and a discharge pipe 73 is arranged at the bottom of the screw feeding bin 71. The bottom of the discharge pipe 73 is connected to the drain port 42 at the bottom of the screening cylinder 4 through a rotating bearing. One end of the discharge cylinder 8 is connected to the bottom of the screw feeding seat 72, and the other end is connected to the discharge pipe 43 arranged outside the screening cylinder 4.

[0033] Down feathers sink from the feed cylinder 61 into the spiral feed bin 71; the spiral feed seat 72 rotates from top to bottom inside the spiral feed bin 71, slowly conveying the down feathers downward to the discharge cylinder 8. One end of the discharge pipe 43 is connected to a negative pressure device for extracting the dried down feathers.

[0034] Furthermore, a conical guide section 44 is provided on the inner side of the screening cylinder 4 and below the feed cylinder 61, and the screening cylinder 4 is divided into a screening chamber 45 and a sewage discharge chamber 46 by the conical guide section 44. Several discharge holes 441 are arranged around the conical guide section 44, and the screening chamber 45 is connected to the sewage discharge chamber 46 through the discharge holes 441. An annular heating module 47 is provided on the outer wall of the screening cylinder 4 and at the sewage discharge chamber 46. A sewage discharge valve 48 is provided at the sewage discharge port 42. A flushing inlet hole 49 is provided at the upper end of the screening cylinder 4.

[0035] Wastewater and small-sized debris in the screening chamber 45 can settle into the sewage discharge chamber 46 through the drain hole 441 and flush the inlet hole 49 to inject water into the screening chamber 45, forming an aqueous environment. Taking advantage of the characteristics of down having a low density and being easy to float, and debris having a high density and being easy to settle, the separation of down and debris is accelerated.

[0036] The annular heating module 47 heats the sewage in the sewage discharge chamber 46. The heat is conducted to the chamber through the wall of the spiral feeding bin 71, which indirectly heats the down and evaporates the small amount of moisture attached to the surface of the down, thus achieving drying. During the drying process, the tiny dirt residues remaining on the surface of the down will be removed with the moisture and eventually discharged from the sewage discharge port 42 with the water flow. After the drain valve 48 is opened, the sewage in the drain chamber 46 and the water and debris in the screw feed hopper 71 are discharged through the drain port 42.

[0037] Open the drain valve 48, and the sewage in the drain chamber 46 and the water and dirt in the screw feed bin 71 are discharged through the drain port 42; at the same time, water is introduced into the inlet cylinder 23 through the guide pipe 24, and the water flows into the screw feed bin 71 through the threaded drum 22 and the feed cylinder 61 to wash away the residual dirt in the screw feed bin 71. The washing water is finally discharged from the drain port 42, thus cleaning the inside of the device.

[0038] A method of using a screening device for removing foreign objects from recycled down feathers includes the following steps: S1. The material is fed through the primary screening cylinder 3 for primary screening; S2. The primary screening cylinder 3 and the screening cylinder 4 are threaded together and synchronously linked by the rotation drive structure 2. S3. The waste is screened and separated by the screen structure 5 and the rotating scraping component 6. The screened waste flows into the sewage discharge chamber 46 with the water flow, and the recovered down enters the screw feeding mechanism 7. S4. The spiral feeding mechanism 7 conveys down and heats the water flow in the drain chamber 46 through the annular heating module 47, thereby heating the spiral feeding bin 71 to achieve down drying. S5. The dried down is discharged through the discharge cylinder 8, and the sewage and water from the spiral feed hopper 71 are discharged through the drain outlet 42.

[0039] In step S1, the recycled down is introduced into the primary screening cylinder 3 through the flexible telescopic feed pipe 34. Large foreign objects are initially screened using the inclined drop screen 32 and the blocking screen 33 within the primary screening cylinder 3. In step S2, the drive motor 21 drives the threaded drum 22 to rotate, causing the primary screening cylinder 3 to passively descend and connect threadedly to the screening cylinder 4, thus driving the screening cylinder 4 to rotate synchronously. After the primary screening cylinder 3 and screening cylinder 4 are threadedly connected, the bottom of the scraper 54 contacts the screening filter screen 51. In step S3... In the process, when the screening cylinder 4 rotates, the screen structure 5 rotates synchronously, and the scraper part 54 scrapes out large-sized foreign objects. Then, the down falls into the screening chamber 45, and water is injected into the screening chamber 45 through the flushing inlet hole 49. The rotating drive motor 21 drives the feeding cylinder 61 to rotate, thereby driving the arc-shaped scraper cylinder 62 to scrape the floating down into the feeding cylinder 61 and sink it into the spiral feeding bin 71, while the dirt is deposited at the bottom. After the scraping is completed, the drain hole 441 is opened to guide the deposited dirt into the sewage discharge chamber 46.

[0040] In step S4, the annular heating module 47 is heated by an external heating device to increase the temperature of the water flow in the sewage chamber, thereby indirectly drying the down in the spiral feed hopper 71 and separating the attached dirt. In step S5, the dried down is sucked out by the negative pressure outside the discharge cylinder 8. After the sewage and the water flow of the spiral feed hopper 71 are discharged through the drain port 42, the water flow is introduced into the inlet cylinder 23 through the guide pipe 24. The introduced water flow flows into the spiral feed hopper 71 machine through the threaded drum 22 and the feed cylinder 61 in sequence for rinsing. The rinsed water flow is discharged through the drain port 42.

[0041] In summary, the principle of this embodiment is as follows: the recovered down flexible telescopic feed pipe 34 enters the primary screening cylinder 3, where large-sized foreign objects are initially screened. Then, the rotation drive structure 2 drives the primary screening cylinder 3 to be threadedly connected to the screening cylinder 4 and rotate synchronously. The conical guide section 44 inside the screening cylinder 4 separates the screening chamber 45 and the sewage discharge chamber 46. After water is injected into the screening chamber 45, the scraping part 54 of the screen structure 5 scrapes off foreign objects on the screening filter screen 51. The arc-shaped scraping cylinder 62 of the rotating scraping component 6 rotates with the feed cylinder 61 to collect floating down, which is then filtered through the filter screen and sent into the... The feed cylinder 61 sinks into the spiral feed hopper 71; at the same time, the annular heating module 47 heats the sewage discharge chamber 46 and the water flow indirectly dries the down in the spiral feed hopper 71. The spiral feed seat 72 conveys the down to the discharge cylinder 8, and the negative pressure equipment connected to the discharge pipe 43 sucks out the pure down. The sewage and dirt enter the sewage discharge chamber 46 through the discharge hole 441 of the conical guide part 44 and are discharged from the sewage discharge port 42 with the sewage discharge valve 48. Subsequently, water can be introduced through the guide pipe 24 and the inlet cylinder 23 to rinse the spiral feed hopper 71, realizing the integrated operation of down screening, drying and cleaning.

[0042] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0043] Although this article extensively uses the following components: hoisting frame 1, rotating clearance channel 11, rotating drive structure 2, rotating drive motor 21, threaded drum 22, inlet cylinder 23, guide pipe 24, primary screening cylinder 3, threaded connection part 31, inclined drop screen 32, barrier net 33, flexible telescopic feed pipe 34, screening cylinder 4, threaded connection seat 41, drain port 42, discharge pipe 43, conical guide part 44, drain hole 441, screening chamber 45, drain chamber 46, and annular heating module 47. Drain valve; 48. Flushing inlet hole; 49. Screen structure; 5. Screening filter; 51. Clearing channel; 52. Connecting frame; 53. Scraper section; 54. Inner arc section; 541. Outer arc section; 542. Rotary scraping assembly; 6. Feed cylinder; 61. Arc-shaped scraper cylinder; 62. Arc-shaped receiving section; 63. Feeding area; 64. Screw feeding mechanism; 7. Screw feeding bin; 71. Screw feeding seat; 72. Discharge pipe; 73. Discharge cylinder, etc. These terms are used only for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A screening device for removing foreign matter from recycled down feathers, comprising a ring-shaped lifting frame (1), wherein the lifting frame (1) is provided with a rotation drive structure (2), characterized in that, The output end of the rotary drive structure (2) is threadedly connected to the primary screening cylinder (3). The output end of the rotary drive structure (2) and located below the primary screening cylinder (3) are connected to the screening cylinder (4). The primary screening cylinder (3) is passively driven by the rotary drive structure (2) and is threadedly connected to the screening cylinder (4). The screening cylinder (4) is provided with a screen structure (5) and a rotary scraping component (6) in sequence. The output end of the rotary drive structure (2) is linked to a spiral feeding mechanism (7) located inside the screening cylinder (4). The spiral feeding mechanism (7) and the rotary scraping component (6) are interconnected. The bottom of the screening cylinder (4) is provided with a discharge cylinder (8) that is interconnected with the spiral feeding structure.

2. The screening device for removing foreign matter from recycled down according to claim 1, characterized in that, The upper end of the primary screening cylinder (3) is closed and the lower end is open. The lower end of the primary screening cylinder (3) has a threaded connection part (31). The upper end of the screening cylinder (4) is provided with a threaded connection seat (41) corresponding to the threaded connection part (31). The inner side of the primary screening cylinder (3) is provided with several inclined dropping screens (32) arranged in an alternating manner. The lower end of the inner side of the primary screening cylinder (3) is detachably provided with a barrier net (33) for intercepting large-sized foreign objects.

3. A screening device for removing foreign matter from recycled down according to claim 2, characterized in that, The rotation drive structure (2) includes a rotation drive motor (21) mounted on the hoisting frame (1). The output end of the rotation drive motor (21) is connected to a threaded spool (22). The threaded spool (22) is threadedly connected to the primary screening cylinder (3). The upper end of the primary screening cylinder (3) is provided with a flexible telescopic feed pipe (34). The hoisting frame (1) is provided with a rotation clearance groove (11) for the flexible telescopic feed pipe (34) to be inserted and move circumferentially. An inlet cylinder (23) is provided between the threaded spool (22) and the output end of the rotation drive motor (21) and communicates with the threaded spool (22). A guide pipe (24) extending toward the rotation clearance groove (11) is connected to one side of the inlet cylinder (23).

4. A screening device for removing foreign matter from recycled down according to claim 3, characterized in that, The screen structure (5) includes a screening filter (51) disposed on the inner side of the screening cylinder (4) and located below the threaded connection seat (41). The screening filter (51) has a clearance channel (52) in the middle for the threaded spool (22) to pass through. The lower end of the screening cylinder (4) is connected to a plurality of scraping parts (54) through a connecting frame (53). The scraping parts (54) include an inner arc-shaped part (541) and an outer arc-shaped part (542). The inner arc-shaped part (541) and the outer arc-shaped part (542) are staggered. When the initial screening cylinder (3) descends and is threadedly connected to the screening cylinder (4) and rotates in linkage, the bottom of the inner arc-shaped part (541) and the outer arc-shaped part (542) are in contact with the screening filter (51).

5. A screening device for removing foreign matter from recycled down according to claim 3, characterized in that, The rotary scraping assembly (6) includes a feed cylinder (61) connected to and rotating in conjunction with the threaded drum (22). The feed cylinder (61) is provided with a plurality of arc-shaped scraping cylinders (62) in the circumferential direction. One end of the scraping part (54) is provided with an arc-shaped receiving part (63) and the other end is connected to the feed cylinder (61). The inner wall of the scraping part (54) has a feeding area (64) in the circumferential direction, and both the feeding area (64) and the arc-shaped receiving part (63) are provided with filter screens.

6. A screening device for removing foreign matter from recycled down according to claim 5, characterized in that, The spiral feeding mechanism (7) includes a spiral feeding bin (71) connected to the lower end of the feeding cylinder (61). The spiral feeding bin (71) is provided with a spiral feeding seat (72) from top to bottom, and a discharge pipe (73) is provided at the bottom of the spiral feeding bin (71). The bottom of the discharge pipe (73) is connected to the drain port (42) at the bottom of the screening cylinder (4) through a rotating bearing. One end of the discharge cylinder (8) is connected to the bottom of the spiral feeding seat (72), and the other end is connected to the discharge pipe (43) provided outside the screening cylinder (4).

7. A screening device for removing foreign matter from recycled down according to claim 6, characterized in that, The screening cylinder (4) is provided with a conical guide section (44) on the inner side of the circumference and below the feed cylinder (61), and the screening cylinder (4) is divided into a screening chamber (45) and a sewage discharge chamber (46) by the conical guide section (44). The conical guide section (44) is provided with a plurality of drainage holes (441) arranged in the circumference. The screening chamber (45) is connected to the sewage discharge chamber (46) through the drainage holes (441). The screening cylinder (4) is provided with an annular heating module (47) on the outer wall of the circumference and at the sewage discharge chamber (46). The sewage discharge port (42) is provided with a sewage discharge valve (48). The upper end of the screening cylinder (4) is provided with a flushing inlet hole (49).

8. A method of using the screening device according to any one of claims 1-7, characterized in that, Includes the following steps: S1. The material is fed through the primary screening cylinder (3) for primary screening; S2. The primary screening cylinder (3) and the screening cylinder (4) are connected by a rotating drive structure (2) and moved synchronously. S3. The sludge is screened and separated by the screen structure (5) and the rotating scraping component (6). The screened sludge flows into the sewage discharge chamber (46) with the water flow, and the recovered down enters the screw feeding mechanism (7). S4. The spiral feeding mechanism (7) conveys down and heats the water flow in the drain chamber (46) through the annular heating module (47), thereby heating the spiral feeding bin (71) to achieve down drying. S5. The dried down is discharged through the discharge cylinder (8), and the sewage and water from the spiral feed hopper (71) are discharged through the drain outlet (42).

9. A method of using a screening device for removing foreign matter from recycled down according to claim 8, characterized in that, In step S1, the recycled down is introduced into the primary screening cylinder (3) through the flexible telescopic feed pipe (34). Large-sized foreign objects are initially screened using the inclined drop screen (32) and the barrier screen (33) inside the primary screening cylinder (3). In step S2, the drive motor (21) drives the threaded drum (22) to rotate, and the primary screening cylinder (3) is passively lowered and threadedly connected to the screening cylinder (4), driving the screening cylinder (4) to rotate synchronously. After the primary screening cylinder (3) and the screening cylinder (4) are threadedly connected, the bottom of the scraper (54) comes into contact with the screening filter screen (51). In step S3, when the screening cylinder (4) rotates, the screen structure (5) rotates synchronously, and the scraper (54) scrapes out large-sized foreign objects. Then, the down falls into the screening chamber (45), and water is injected into the screening chamber (45) through the flushing inlet hole (49). The rotating drive motor (21) drives the feeding cylinder (61) to rotate, thereby driving the arc-shaped scraper (62) to scrape the floating down into the feeding cylinder (61) and sink it into the spiral feeding bin (71), while the dirt is deposited at the bottom. After the scraping is completed, the drain hole (441) is opened to guide the deposited dirt into the sewage discharge chamber (46).

10. A method of using a screening device for removing foreign matter from recycled down according to claim 8, characterized in that, In step S4, the ring heating module (47) is heated by an external heating device to increase the temperature of the sewage chamber water flow, thereby indirectly drying the down in the spiral feed bin (71) and separating the attached dirt; in step S5, the dried down is sucked out by the negative pressure outside the discharge cylinder (8), and the sewage and water flow of the spiral feed bin (71) are discharged through the drain port (42) and then introduced into the inlet cylinder (23) through the guide pipe (24). The introduced water flows into the spiral feed bin (71) machine through the threaded drum (22) and the feed cylinder (61) for rinsing. The rinsed water is discharged through the drain port (42).

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