Efficient screening and detecting machine for long fiber particles

Abstract

The invention relates to the technical field of long fiber particle screening, in particular to an efficient screening and detecting machine for long fiber particles. Comprising a screening box, a containing through groove is formed in the position, close to the left side, of the top of the upper end of the screening box, the top end of the containing through groove is rotationally connected with a material combing shaft rod, a fiber yarn removing mechanism is arranged in the containing through groove and located below the material combing shaft rod, and a multi-stage screening mechanism is arranged in the screening box and used for screening long fiber particles; under the cooperation of the arranged feeding bin and the containing through groove, automatic material distribution type feeding is completed, the screening amount entering the two screening plates can be adjusted in a self-adaptive mode, feeding can automatically enter the two layers of screening plates every time, meanwhile, screening operation is conducted on the multiple screening plates, the screening amount can be increased while the occupied area is reduced, multi-stage type screening is achieved, and the screening efficiency is improved. Under the limited occupied area, the screening path is effectively prolonged, and the screening effect is also improved; and through the protective cover, the sound insulation and dust prevention effects are achieved, and meanwhile impurities are collected.

Description

Technical Field

[0001] The invention relates to the technical field of long-fiber particle screening, and in particular to a long-fiber particle high-efficiency screening and detection machine. Background Art

[0002] High-efficiency screening of long-fiber particles usually refers to the screening and quality testing of particles containing long-fiber materials during processing to ensure that the quality of the final product meets the standards. This type of screening test is usually used in many industries such as papermaking, textiles, biomass fuels, composite materials, etc. About the impurity removal step in the high-efficiency screening test of long-fiber particles: to ensure that the fiber particles do not contain impurities such as metal fragments, stones and fiber filaments.

[0003] Existing screening and testing machines include cylindrical and long horizontal types. Long horizontal screening machines occupy a large area and generally require a small amount of multiple feeding methods for screening, and require manual intervention in the feeding amount, otherwise the thick material on the screening net will affect the screening quality. Cylindrical screening machines generally occupy a smaller area, but the amount of screening each time is also limited; and the noise generated by these two existing screening machines is relatively large, affecting the working environment. Summary of the invention

[0004] The present invention provides a long-fiber particle efficient screening and detection machine, which solves the problems existing in the background technology.

[0005] The present invention provides a long-fiber particle efficient screening and testing machine, comprising a screening box, a receiving slot is provided at the top of the upper end of the screening box near the left side, a combing shaft is rotatably connected to the top of the receiving slot, a fiber removal mechanism is provided on the receiving slot below the combing shaft, an inner discharge port is provided at the bottom of the lower end of the screening box, four impurity outlets are provided on the rear side of the screening box from top to bottom, and a vibration motor is provided on the screening box; a multi-stage screening mechanism is provided inside the screening box for screening the long-fiber particles; a guide plate is provided correspondingly to the multi-stage screening mechanism. Below the multi-stage screening mechanism, it is used to export the screened impurities to the outside of the screening box; wherein, the multi-stage screening mechanism includes four screening plates arranged in sequence from top to bottom, the front and rear sides of the screening plates are fixedly connected to the inner wall of the screening box, the two screening plates located at the top are primary screening plates, and the two screening plates located at the bottom are secondary screening plates, the two primary screening plates at the top are inclined downward from left to right, and the two primary screening plates are each provided with a diversion component for limiting the flow of long fiber particles in screening; the two secondary screening plates at the bottom are inclined upward from left to right.

[0006] During screening, the long-fiber particles entering the screening box enter the two primary screening plates for the first screening operation. The long-fiber particles on the upper primary screening plate enter the lower secondary screening plate for the second screening after the first screening. The long-fiber particles on the lower primary screening plate enter the upper secondary screening plate for the second screening after the first screening.

[0007] In one possible implementation, the fiber removal mechanism includes a rotating roller rotatably connected to the front and rear sides of the screening box, the rear side of the rotating roller rotates and penetrates the rear side of the screening box, a plurality of detachable sleeves are rotatably connected to the rotating roller, a plurality of circular grooves with barbs are provided on the detachable sleeves, and a plurality of rubber hoses are provided on the detachable sleeves.

[0008] In one possible implementation, the diversion assembly includes a driving shaft rotatably connected to the front and rear sides of the screening box, and a sleeve is fixedly mounted on the outer wall of the driving shaft, and the sleeve is evenly fixedly connected to a limiting flow baffle in the circumference, the distance from the left driving shaft to the primary screening plate is greater than the distance from the right driving shaft to the primary screening plate, and a linkage drive assembly is provided on the rear side of the screening box and on the driving shaft.

[0009] In one possible implementation, the linkage drive assembly includes a transition rotating rod rotatably connected to the rear side of the screening box, the transition rotating rod is connected to the rotating roller through a belt, a small diameter gear is fixedly connected to the transition rotating rod, a large diameter gear is fixedly connected to the driving shaft close to the transition rotating rod, the small diameter gear is meshed with the large diameter gear, and the rear sides of the two driving shafts located above the same primary screening plate are connected through a belt drive, and one of the driving shafts located above is also connected to the corresponding driving shaft located below through a belt drive.

[0010] In one possible implementation, the protective cover also includes a through slot at the upper end of the protective cover corresponding to the position of the accommodating through slot, a feed bin is fixedly connected in the through slot, the bottom end of the feed bin is movably placed in the accommodating through slot, the front and rear ends of the screening box are fixedly connected with a placement cylinder, the front and rear inner walls of the protective cover are fixedly connected with an elastic lifting and retracting rod at the position of the placement cylinder, the telescopic section of the elastic lifting and retracting rod is movably arranged in the placement cylinder, and a support spring is fixedly connected between the bottom end of the inner wall of the protective cover and the bottom end of the screening box.

[0011] In one possible implementation, the guide plates are arranged to be tilted downward from front to back, the front sides of the four guide plates are fixedly connected to the front side of the inner wall of the screening box, the rear sides of the guide plates extend to the impurity outlet correspondingly opened on the rear side of the screening box, and a baffle plate is fixedly connected to the left side of the uppermost guide plate.

[0012] In one possible implementation, the left end of the upper-level screening plate is hinged with a dividing plate through a torsion spring. The dividing plate is located below the accommodating slot. The left end of the dividing plate does not contact the left inner wall of the screening box. The inclination angle of the dividing plate is consistent with the inclination angle of the upper-level screening plate.

[0013] In one possible implementation, a plurality of top material blocks are evenly arranged on the combing shaft from front to back along its axial direction, and the top material block is located at the bottom end of the feed bin, a driving source is arranged at one end of the combing shaft, and the combing shaft and the rotating roller are connected by a belt drive.

[0014] In one possible implementation, the right end of the upper secondary screen plate is located on the left side of the right end of the lower secondary screen plate, and a material baffle plate is fixedly connected to the right side of the upper secondary screen plate, the left ends of the two secondary screen plates do not abut the inner wall of the screening box, the left end of the upper first-level screen plate is located on the right side of the left end of the lower first-level screen plate, and the right end of the upper first-level screen plate is located on the right side of the right end of the lower first-level screen plate, the length of the upper first-level screen plate is longer than that of the lower first-level screen plate, and the left end of the upper first-level screen plate is located at a lower middle position of the accommodating through groove, and the diameter of the screening holes on the first-level screen plate is larger than the diameter of the screening holes on the secondary screen plate.

[0015] In one possible implementation, an impurity discharge port is provided at the bottom of the protective cover, and an external discharge port is provided at the bottom of the protective cover at a position corresponding to the internal discharge port, and a cotton cloth tube is fixedly connected between the internal discharge port and the external discharge port.

[0016] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0017] 1. According to an embodiment of the present invention, a high-efficiency screening and testing machine for long-fiber particles is provided. Automatic material-dividing feeding is completed through the cooperation of the set feed bin and the accommodating through slot. The screening amount entering the two screen plates can be adaptively adjusted, and each time the feed can automatically enter the two layers of screening plates. Screening operations can be performed on multiple screening plates at the same time, which can increase the screening amount while reducing the floor space. Through this multi-stage screening, the screening path can be effectively extended and the screening effect can be improved under a limited floor space; and the protective cover can collect impurities while playing the role of sound insulation and dust prevention.

[0018] 2. According to an embodiment of the present invention, a high-efficiency screening and detection machine for long-fiber particles is provided. Through the fiber removal mechanism, it is able to entangle and collect impurities in the fiber filaments while feeding the long-fiber particles. The structure is simple in design, and the detachable sleeve can be replaced regularly to ensure the effect of removing the fiber filaments.

[0019] 3. According to an embodiment of the present invention, a high-efficiency screening and detection machine for long-fiber particles is provided. Through the provided diverter component, the amount of screening falling onto the screening plate can be quantitatively controlled to ensure the screening quality. The diverter component is driven at a reduced speed through a linkage drive component and does not require additional drive. The overall structure is simple, but can achieve very beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a first-perspective view of a long-fiber particle efficient screening and detection machine provided by an embodiment of the present invention.

[0021] Figure 2 It is a structural schematic diagram of a long-fiber particle efficient screening and detection machine provided by an embodiment of the present invention from a second viewing angle (part of the protective cover structure is hidden).

[0022] Figure 3 It is a partial structural cross-sectional view of a long-fiber particle efficient screening and detection machine provided by an embodiment of the present invention.

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0024] Figure 5 It is a partial structural cross-sectional view of a long-fiber particle efficient screening and detection machine provided by an embodiment of the present invention.

[0025] Figure 6 It is a structural schematic diagram of a fiber removal mechanism of a long-fiber particle efficient screening and detection machine provided by an embodiment of the present invention.

[0026] In the figure: 1. screening box; 11. containing slot; 12. combing shaft; 121. top material block; 13. inner discharge port; 14. impurity outlet; 2. fiber removal mechanism; 21. rotating roller; 22. detachable sleeve; 3. multi-stage screening mechanism; 31. primary screening plate; 32. secondary screening plate; 321. baffle plate; 33. diversion assembly; 331. driving shaft; 332. sleeve; 333. current limiting baffle; 334. transition rotating rod; 335. small diameter gear; 336. large diameter gear; 4. guide plate; 41. shielding plate; 5. dividing plate; 6. protective cover; 61. feed bin; 62. placing cylinder; 63. elastic lifting and retracting rod; 64. supporting spring; 65. impurity discharge port; 66. outfeed port; 67. cotton cloth cylinder. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] See also Figure 1 , Figure 2 and Figure 3 , a long fiber particle efficient screening and testing machine comprises a screening box 1, a receiving slot 11 is provided at the top of the upper end of the screening box 1 near the left side, a combing shaft rod 12 is rotatably connected to the top of the receiving slot 11, a fiber removing mechanism 2 is provided on the receiving slot 11 below the combing shaft rod 12, an inner discharge port 13 is provided at the bottom of the lower end of the screening box 1, four impurity outlets 14 are provided on the rear side of the screening box 1 from top to bottom, and a vibration motor is provided on the screening box 1; the vibration motor is always in the on state during the screening process, a multi-stage screening mechanism 3 is arranged inside the screening box 1, and is used for screening long fiber particles; a guide plate 4 is correspondingly arranged below the multi-stage screening mechanism 3, and is used for guiding the screened impurities to the outside of the screening box 1.

[0029] See also Figure 3 and Figure 5 The multi-stage screening mechanism 3 includes four screening plates arranged in sequence from top to bottom, the two screening plates located at the top are primary screening plates 31, and the two screening plates located at the bottom are secondary screening plates 32. The two primary screening plates 31 at the top are inclined downward from left to right, and the left end of the upper primary screening plate 31 is located on the right side of the left end of the lower primary screening plate 31, and the right end of the upper primary screening plate 31 is located on the right side of the right end of the lower primary screening plate 31. The length of the upper primary screening plate 31 is longer than that of the lower primary screening plate 31, and the left end of the upper primary screening plate 31 is located at the lower middle part of the accommodating slot 11. A diversion component 33 for limiting the flow of long-fiber particles in screening is arranged above the two primary screening plates 31. The two secondary screening plates 32 below are tilted upward from left to right, the right end of the upper secondary screening plate 32 is located on the left side of the right end of the lower secondary screening plate 32, and a material blocking plate 321 is fixedly connected to the right side of the upper secondary screening plate 32, and the left ends of the two secondary screening plates 32 do not abut against the inner wall of the screening box 1.

[0030] During operation, since screening holes are provided on both the primary screening plate 31 and the secondary screening plate 32, the diameter of the screening holes on the primary screening plate 31 is larger than that on the secondary screening plate 32. The primary screening plate 31 performs coarse screening on the long-fiber particles, and the secondary screening plate 32 performs further fine screening on the long-fiber particles. The material blocking plate 321 prevents the long-fiber particles on the primary screening plate 31 below from entering the secondary screening plate 32 below in large quantities when entering the secondary screening plate 32. The setting of the secondary screening plate 32 extends the screening path. During screening operation, the long-fiber particles entering the screening box 1 enter the two primary screening plates 31 for the first screening operation respectively. The long-fiber particles on the upper primary screening plate 31 enter the lower secondary screening plate 32 for the second screening after the first screening, and the long-fiber particles on the lower primary screening plate 31 enter the upper secondary screening plate 32 for the second screening after the first screening.

[0031] See also Figure 3 and Figure 6 The fiber removal mechanism 2 includes a rotating roller 21 rotatably connected to the front and rear sides of the screening box 1. The rear side of the rotating roller 21 rotates and passes through the rear side of the screening box 1. A plurality of detachable sleeves 22 are rotatably connected to the rotating roller 21. The detachable sleeves 22 are provided with a plurality of circular grooves with barbs, and the detachable sleeves 22 are provided with a plurality of rubber hoses.

[0032] The fiber removal mechanism 2 is set to collect the fiber impurities in the long fiber particles passing through. Here, it should be noted that the length of the detachable sleeve 22 is shorter than the length of the long fiber particles, and the fiber impurities will be entangled on the rubber hose on the detachable sleeve 22, and multiple detachable sleeves 22 are rotatably connected to the rotating roller 21. Since the long fiber particles are light in weight, when the long fiber particles fall on the detachable sleeve 22, they will be blocked by the rubber hose, and the barbed circular grooves on the detachable sleeve 22 will scrape and collect the fiber filaments. Since the length of the detachable sleeve 22 is shorter than the length of the long fiber particles, once the adjacent detachable sleeves 22 rotate under the impact of a large number of long fiber particles, the long fiber particles on the detachable sleeve 22 will be driven to fall into the inside of the screening box 1.

[0033] See also Figure 2 and Figure 3 A plurality of top material blocks 121 are evenly arranged on the combing material shaft rod 12 along its axial direction from front to back, a driving source is arranged at one end of the combing material shaft rod 12, and the combing material shaft rod 12 and the rotating roller 21 are connected by belt transmission.

[0034] The rotation of the combing shaft 12 drives the pushing block 121 to intermittently push the long-fiber particles in the feed port, so as to avoid the feed port being blocked by excessive feeding in a short time.

[0035] See also Figure 4The left end of the upper first-level screening plate 31 is hinged with a dividing plate 5 through a torsion spring. The dividing plate 5 is located below the accommodating slot 11. The left end of the dividing plate 5 does not contact the left inner wall of the screening box 1. The initial inclination angle of the dividing plate 5 is consistent with the inclination angle of the upper first-level screening plate 31.

[0036] In a natural state, the dividing plate 5 keeps the same inclination angle as that of the primary screening plate 31. When the number of falling long-fiber particles is small, most of the long-fiber particles will fall to the dividing plate 5 and the upper end of the upper primary screening plate 31, and a small part of the long-fiber particles will fall to the upper end of the lower primary screening plate 31. When the number of long-fiber particles entering the screening box 1 is too large, the dividing plate 5 will tilt to the left, and the long-fiber particles falling on the dividing plate 5 will fall to the upper end of the lower secondary screening plate 32, so that there will not be too many long-fiber particles falling on the upper primary screening plate 31.

[0037] See also Figure 3 and Figure 5 The guide plates 4 are tilted downward from front to back, the front sides of the four guide plates 4 are fixedly connected to the front side of the inner wall of the screening box 1, and the rear sides of the guide plates 4 extend to the impurity outlet 14 correspondingly opened on the rear side of the screening box 1. A shielding plate 41 is fixedly connected to the left side of the guide plate 4 at the uppermost end.

[0038] The guide plate 4 is provided in order to guide the metal fragments and stones after the long-fiber particles are screened by the first-stage screening plate 31 and the second-stage screening plate 32 out of the outside of the screening box 1. Since the screening box 1 is always in a vibrating state due to the vibration motor, the rear side of the guide plate 4 extends to the impurity outlet 14 to prevent impurities from falling into the screening box 1. The baffle plate 41 is provided to prevent the long-fiber particles from falling into the upper end of the guide plate 4 when entering the first-stage screening plate 31 below.

[0039] See also Figure 3 and Figure 4 The flow diversion assembly 33 includes a driving shaft 331 rotatably connected to the front and rear sides of the screening box 1, and a sleeve 332 is fixedly sleeved on the outer wall of the driving shaft 331, and the sleeve 332 is evenly fixedly connected to the limiting flow baffle 333 in the circumferential direction. The distance from the left driving shaft 331 to the primary screening plate 31 is greater than the distance from the right driving shaft 331 to the primary screening plate 31. A linkage drive assembly is provided at the rear side of the screening box 1 and on the driving shaft 331.

[0040] Continue reading Figure 2The linkage drive assembly includes a transition rotating rod 334 rotatably connected to the rear side of the screening box 1, the transition rotating rod 334 is connected to the rotating roller 21 through a belt, a small diameter gear 335 is fixedly connected to the transition rotating rod 334, a large diameter gear 336 is fixedly connected to the driving shaft 331 close to the transition rotating rod 334, the small diameter gear 335 is meshed with the large diameter gear 336, the rear sides of the two driving shafts 331 located above the same primary screening plate 31 are connected through a belt transmission, and one of the driving shafts 331 located above is also connected to the corresponding driving shaft 331 located below through a belt transmission.

[0041] The flow dividing component 33 is set to keep the thickness of the long fiber particles that fall into the screening process at a relatively thin level, so as to prevent the impurities located above the thicker long fiber particles from not being screened out in time during the screening process. In addition, there is a certain distance between the flow limiting baffle 333 and the primary screening plate 31. The flow limiting baffle 333 can play a flow limiting role in the process of long fiber particles on the primary screening plate 31 being screened from left to right. Since a space is formed between the flow limiting baffle 333 and the upper end of the primary screening plate 31, too many long fiber particles will be blocked in the space formed by the driving shaft 331 and the primary screening plate 31, and the rotating roller 21 drives the transition rotating rod 334 to rotate. The small straight The small diameter gear 335 is meshed with the large diameter gear 336. Since the diameter of the small diameter gear 335 is smaller than that of the large diameter gear 336, the rotation speed of the driving shaft 331 connected to the large diameter gear 336 will be slower than the rotation speed of the transition rod 334, which plays a role of speed reduction. Multiple driving shafts 331 rotate synchronously through belts; the current limiting baffle 333 is driven to rotate under the rotation of the driving shaft 331. Since the distance from the driving shaft 331 on the left to the primary screening plate 31 is greater than the distance from the driving shaft 331 on the right to the primary screening plate 31, the screening thickness of the long fiber particles located at the upper right end of the primary screening plate 31 is smaller than the long fiber particles at the upper left end of the primary screening plate 31.

[0042] See also Figure 1 , Figure 3 and Figure 5, also includes a protective cover 6, a through groove is opened at the upper end of the protective cover 6 corresponding to the position of the accommodating through groove 11, a feed bin 61 is fixedly connected in the through groove, the bottom end of the feed bin 61 is movably placed in the accommodating through groove 11, and the top material block 121 is located at the bottom end of the feed bin 61, the front and rear ends of the screening box 1 are fixedly connected with a placement cylinder 62, the front and rear inner walls of the protective cover 6 are fixedly connected with an elastic lifting and shrinking rod 63 corresponding to the position of the placement cylinder 62, the telescopic section of the elastic lifting and shrinking rod 63 is movably arranged in the placement cylinder 62, a supporting spring 64 is fixedly connected between the bottom end of the inner wall of the protective cover 6 and the bottom end of the screening box 1, an impurity discharge port 65 is opened at the bottom end of the protective cover 6, and an outfeed port 66 is opened at the bottom end of the protective cover 6 corresponding to the position of the inner discharge port 13, and a cotton cloth cylinder 67 is fixedly connected between the inner discharge port 13 and the outfeed port 66.

[0043] The protective cover 6 is made of sound insulation material. The setting of the protective cover 6 plays a role in sound insulation and dust prevention for the screening box 1, and the protective cover 6 can also collect the impurities after screening. It should be noted here that the bottom end of the protective cover 6 is a detachable structure, and the impurity discharge port 65 is normally closed by a rubber plug. When the screening box 1 vibrates, the elastic lifting rod 63 can be adaptively adjusted, and the elastic lifting rod 63 is always placed in the cylinder 62.

[0044] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A long fiber particle efficient screening and detection machine, characterized by: The invention comprises a screening box (1), wherein a receiving slot (11) is provided at the top of the upper end of the screening box (1) near the left side, a combing shaft (12) is rotatably connected to the top of the receiving slot (11), a fiber removal mechanism (2) is provided on the receiving slot (11) below the combing shaft (12), an inner discharge port (13) is provided at the bottom of the lower end of the screening box (1), four impurity outlets (14) are provided on the rear side of the screening box (1) from top to bottom, and a vibration motor is provided on the screening box (1); A multi-stage screening mechanism (3), arranged inside the screening box (1), for screening long-fiber particles; A material guide plate (4) is correspondingly arranged below the multi-stage screening mechanism (3) and is used to guide the screened impurities to the outside of the screening box (1); The multi-stage screening mechanism (3) comprises four screening plates arranged in sequence from top to bottom, the front and rear sides of the screening plates are fixedly connected to the inner wall of the screening box (1), the two screening plates located at the top are primary screening plates (31), and the two screening plates located at the bottom are secondary screening plates (32), the two primary screening plates (31) at the top are inclined downward from left to right, and a flow dividing component (33) for limiting the flow of long-fiber particles in screening is arranged above the two primary screening plates (31); the two secondary screening plates (32) at the bottom are inclined upward from left to right; During the screening operation, the long-fiber particles entering the screening box (1) enter the two primary screening plates (31) for the first screening operation respectively, and the long-fiber particles on the upper primary screening plate (31) enter the lower secondary screening plate (32) for the second screening operation after the first screening, and the long-fiber particles on the lower primary screening plate (31) enter the upper secondary screening plate (32) for the second screening operation after the first screening.

2. The long fiber particle efficient screening and detection machine according to claim 1, characterized in that: The fiber removal mechanism (2) comprises a rotating roller (21) rotatably connected to the front and rear sides of the screening box (1); the rear side of the rotating roller (21) rotates and penetrates the rear side of the screening box (1); a plurality of detachable sleeves (22) are rotatably connected to the rotating roller (21); a plurality of circular grooves with barbs are provided on the detachable sleeves (22); and a plurality of rubber hoses are provided on the detachable sleeves (22).

3. The long fiber particle efficient screening and detection machine according to claim 1, characterized in that: The flow splitting assembly (33) comprises a driving shaft (331) rotatably connected to the front and rear sides of the screening box (1), and a sleeve (332) is fixedly sleeved on the outer wall of the driving shaft (331), and the sleeve (332) is evenly fixedly connected to the limiting flow baffle (333) in the circumferential direction, and the distance from the left driving shaft (331) to the primary screening plate (31) is greater than the distance from the right driving shaft (331) to the primary screening plate (31), and a linkage drive assembly is arranged at the rear side of the screening box (1) and on the driving shaft (331).

4. The long fiber particle efficient screening and detection machine according to claim 3 is characterized by: The linkage drive assembly comprises a transition rotating rod (334) rotatably connected to the rear side of the screening box (1), the transition rotating rod (334) being transmission-connected to the rotating roller (21) via a belt, a small-diameter gear (335) being fixedly connected to the transition rotating rod (334), a large-diameter gear (336) being fixedly connected to a driving rotating shaft (331) close to the transition rotating rod (334), the small-diameter gear (335) being meshed with the large-diameter gear (336), the rear sides of two driving rotating shafts (331) located above the same primary screening plate (31) being connected via a belt transmission, and one of the driving rotating shafts (331) located above is also connected to a corresponding driving rotating shaft (331) located below via a belt transmission.

5. The long fiber particle efficient screening and detection machine according to claim 1, characterized in that: It also comprises a protective cover (6), wherein a through slot is provided at the upper end of the protective cover (6) at a position corresponding to the receiving through slot (11), a feed bin (61) is fixedly connected in the through slot, the bottom end of the feed bin (61) is movably placed in the receiving through slot (11), the front and rear ends of the screening box (1) are both fixedly connected to a placement cylinder (62), the front and rear inner walls of the protective cover (6) are fixedly connected to an elastic lifting and retracting rod (63) at a position corresponding to the placement cylinder (62), the telescopic section of the elastic lifting and retracting rod (63) is movably arranged in the placement cylinder (62), and a support spring (64) is fixedly connected between the bottom end of the inner wall of the protective cover (6) and the bottom end of the screening box (1).

6. The long fiber particle efficient screening and detection machine according to claim 1, characterized in that: The guide plates (4) are arranged to be tilted downward from front to back, the front sides of the four guide plates (4) are fixedly connected to the front side of the inner wall of the screening box (1), the rear sides of the guide plates (4) extend to the impurity outlets (14) correspondingly opened at the rear side of the screening box (1), and a shielding plate (41) is fixedly connected to the left side of the guide plate (4) located at the uppermost end.

7. The long fiber particle efficient screening and detection machine according to claim 1, characterized in that: The left end of the upper first-stage screening plate (31) is hingedly connected to a dividing plate (5) via a torsion spring. The dividing plate (5) is located below the accommodating slot (11). The left end of the dividing plate (5) does not contact the left inner wall of the screening box (1). The inclination angle of the dividing plate (5) is consistent with the inclination angle of the upper first-stage screening plate (31).

8. The long fiber particle efficient screening and detection machine according to claim 5, characterized in that: The combing shaft (12) is evenly provided with a plurality of material pushing blocks (121) along its axial direction from front to back, and the material pushing blocks (121) are located at the bottom end of the feed bin (61). A driving source is provided at one end of the combing shaft (12), and the combing shaft (12) and the rotating roller (21) are connected via a belt drive.

9. The long fiber particle efficient screening and detection machine according to claim 1, characterized in that: The right end of the upper secondary screening plate (32) is located on the left side of the right end of the lower secondary screening plate (32), and a material blocking plate (321) is fixedly connected to the right side of the upper secondary screening plate (32). The left ends of the two secondary screening plates (32) do not abut against the inner wall of the screening box (1). The left end of the upper primary screening plate (31) is located on the right side of the left end of the lower primary screening plate (31). The right end of the upper primary screening plate (31) is located on the right side of the right end of the lower primary screening plate (31). The length of the upper primary screening plate (31) is longer than that of the lower primary screening plate (31), and the left end of the upper primary screening plate (31) is located at a lower middle position of the accommodating through slot (11). The diameter of the screening holes on the primary screening plate (31) is larger than the diameter of the screening holes on the secondary screening plate (32).

10. The long fiber particle efficient screening and detection machine according to claim 5, characterized in that: An impurity discharge port (65) is provided at the bottom end of the protective cover (6), and an external discharge port (66) is provided at the bottom end of the protective cover (6) at a position corresponding to the internal discharge port (13), and a cotton cloth tube (67) is fixedly connected between the internal discharge port (13) and the external discharge port (66).

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