Long fiber particle high-efficiency screening detection machine

Abstract

This invention relates to the technical field of long fiber particle screening, specifically a high-efficiency screening and testing machine for long fiber particles. It includes a screening box with a receiving trough located near the left side of the top of the screening box. A combing shaft is rotatably connected to the top of the receiving trough. A fiber removal mechanism is located inside the receiving trough below the combing shaft. A multi-stage screening mechanism is installed inside the screening box for screening long fiber particles. Through the cooperation of the feeding hopper and the receiving trough, automatic feeding is achieved, which can adaptively adjust the screening amount entering the two screen plates. Each feeding automatically enters both screening plates, simultaneously performing screening operations on multiple screen plates. This reduces the floor space while increasing the screening amount. The multi-stage screening effectively extends the screening path and improves the screening effect within a limited floor space. Furthermore, a protective cover serves to insulate against sound and dust while collecting impurities.

Description

Technical Field

[0001] This invention relates to the technical field of long fiber particle screening, specifically to a high-efficiency screening and detection machine for long fiber particles. Background Technology

[0002] High-efficiency screening and testing of long-fiber particles typically refers to the screening and quality inspection of particles containing long-fiber materials during processing to ensure that the final product meets standards. This type of screening and testing is commonly used in industries such as papermaking, textiles, biomass fuels, and composite materials. Regarding the impurity removal step in high-efficiency screening and testing of long-fiber particles: This ensures that the fiber particles are free of impurities such as metal fragments, stones, and fiber filaments.

[0003] Existing screening and testing machines include cylindrical and horizontal types. Horizontal screening machines occupy a large area and generally require small, multiple feedings for screening, necessitating manual intervention in the feeding amount. Otherwise, excessively thick material on the screening screen will affect the screening quality. Cylindrical screening machines generally occupy a smaller area, but the amount screened each time is also limited. Furthermore, both of these existing screening machines generate significant noise, affecting the working environment. Summary of the Invention

[0004] This invention provides a high-efficiency screening and detection machine for long fiber particles, which solves the problems existing in the background technology.

[0005] This invention provides a high-efficiency screening and detection machine for long fiber particles, including a screening box. A receiving groove is formed at the top left side of the screening box, and a combing shaft is rotatably connected to the top of the receiving groove. A fiber removal mechanism is arranged on the receiving groove below the combing shaft. An internal discharge port is formed at the bottom of the screening box, and four impurity outlets are formed on the rear side of the screening box from top to bottom. A vibration motor is installed on the screening box. A multi-stage screening mechanism is set inside the screening box for screening long fiber particles. Guide plates are correspondingly arranged on the multi-stage screening mechanism. Below the multi-stage screening mechanism, impurities after screening are discharged to the outside of the screening box. The multi-stage screening mechanism includes four screening plates arranged sequentially 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 at the top are primary screening plates, and the two screening plates at the bottom are secondary screening plates. The two primary screening plates at the top are inclined downward from left to right. A flow diversion component is provided above the two primary screening plates to restrict the flow of long fiber particles during screening. The two secondary screening plates at the bottom are inclined upward from left to right.

[0006] During the screening process, the long fiber particles entering the screening box are screened on two primary screening plates for the first screening operation. After the first screening, the long fiber particles on the upper primary screening plate enter the lower secondary screening plate for the second screening, and after the first screening, the long fiber particles on the lower primary screening plate enter the upper secondary screening plate for the second 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 rotatably passing through the rear side of the screening box, and a plurality of detachable sleeves rotatably connected to the rotating roller. The detachable sleeves are provided with a plurality of round grooves with barbs, and each detachable sleeve is provided with a plurality of rubber hoses.

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

[0009] In one possible implementation, the linkage drive assembly includes a transition rod rotatably connected to the rear side of the screening box. The transition rod is connected to the rotating roller via a belt drive. A small-diameter gear is fixedly connected to the transition rod. A large-diameter gear is fixedly connected to the drive shaft near the transition rod. The small-diameter gear meshes with the large-diameter gear. The rear sides of two drive shafts located above the same primary screening plate are connected via belt drive. One of the drive shafts located above the upper drive shaft is also connected to the corresponding drive shaft located below the lower drive shaft via belt drive.

[0010] In one possible implementation, the device further includes a protective cover. The upper end of the protective cover has a channel corresponding to the position of the receiving channel. A feed hopper is fixedly connected inside the channel. The bottom end of the feed hopper is movably placed inside the receiving channel. Placement cylinders are fixedly connected to the front and rear ends of the screening box. Elastic lifting rods are fixedly connected to the front and rear inner walls of the protective cover corresponding to the positions of the placement cylinders. The telescopic section of the elastic lifting rod is movably disposed inside the placement cylinder. 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 at an angle downwards 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 into the impurity outlets corresponding to 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, a material distribution plate is hinged to the left end of the upper primary screening plate via a torsion spring. The material distribution plate is located below the receiving channel, and the left end of the material distribution plate does not contact the left inner wall of the screening box. The tilt angle of the material distribution plate is the same as the tilt angle of the upper primary screening plate.

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

[0014] In one possible implementation, the right end of the upper secondary screening plate is located to the left of the right end of the lower secondary screening plate, and a baffle plate is fixedly connected to the right side of the upper secondary screening plate. The left ends of both secondary screening plates do not abut against the inner wall of the screening box. The left end of the upper primary screening plate is located to the right of the left end of the lower primary screening plate, and the right end of the upper primary screening plate is located to the right of the right end of the lower primary screening plate. The length of the upper primary screening plate is longer than the length of the lower primary screening plate, and the left end of the upper primary screening plate is located below the middle of the receiving channel. The diameter of the screening holes on the primary screening plate is larger than the diameter of the screening holes on the secondary screening plate.

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

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

[0017] 1. The high-efficiency screening and testing machine for long fiber particles provided in the embodiments of the present invention, through the cooperation of the feeding hopper and the receiving channel, completes the automatic feeding of materials. It can adaptively adjust the screening amount entering the two screen plates, and each feeding can automatically enter the two screening plates, and perform screening operations on multiple screening plates at the same time. While reducing the floor space, it can also increase the screening amount. Through this multi-stage screening, it can effectively extend the screening path and improve the screening effect within a limited floor space. In addition, the protective cover can play a role in sound insulation and dust prevention, while also collecting impurities.

[0018] 2. The long fiber particle high-efficiency screening and detection machine provided in the embodiment of the present invention, through the set fiber removal mechanism, can entangle and collect fiber impurities while the long fiber particles are being fed, and the structure design is simple, the detachable sleeve can be replaced periodically, and the fiber removal effect is guaranteed.

[0019] 3. The long fiber particle high-efficiency screening and detection machine provided in the embodiment of the present invention can quantitatively control the amount of material falling onto the screening plate through the set diversion component to ensure screening quality. Moreover, the diversion component is driven by the linkage drive component to reduce speed, without the need for additional drive. The overall structure is simple, but it can achieve very beneficial results. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of a high-efficiency screening and detection machine for long fiber particles provided in an embodiment of the present invention.

[0021] Figure 2 This is a second-view structural schematic diagram of a high-efficiency screening and detection machine for long fiber particles provided in an embodiment of the present invention (with hidden protective cover structure).

[0022] Figure 3 This is a partial structural cross-sectional view of a high-efficiency screening and detection machine for long fiber particles provided in an embodiment of the present invention.

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

[0024] Figure 5 This is a partial structural cross-sectional view of a high-efficiency screening and detection machine for long fiber particles provided in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the fiber removal mechanism of a high-efficiency screening and detection machine for long fiber particles provided in an embodiment of the present invention.

[0026] In the diagram: 1. Screening box; 11. Receiving trough; 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. Diverting assembly; 331. Driving shaft; 332. Sleeve; 333. Flow limiting baffle; 334. Transition rotating rod; 335. Small diameter gear; 336. Large diameter gear; 4. Guide plate; 41. Baffle plate; 5. Dividing plate; 6. Protective cover; 61. Feed hopper; 62. Placement cylinder; 63. Elastic lifting rod; 64. Support spring; 65. Impurity discharge port; 66. Outer discharge port; 67. Cotton cloth tube. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough 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 modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Please see Figure 1 , Figure 2 and Figure 3 A high-efficiency screening and testing machine for long fiber particles includes a screening box 1. A receiving groove 11 is provided on the upper top near the left side of the screening box 1. A combing shaft 12 is rotatably connected to the top of the receiving groove 11. A fiber removal mechanism 2 is provided on the receiving groove 11 below the combing shaft 12. An inner discharge port 13 is provided at the lower bottom of the screening box 1. Four impurity outlets 14 are provided on the rear side of the screening box 1 from top to bottom. A vibration motor is provided on the screening box 1. The vibration motor is always on during the screening process. A multi-stage screening mechanism 3 is located inside the screening box 1 for screening long fiber particles. A guide plate 4 is correspondingly located below the multi-stage screening mechanism 3 for guiding the screened impurities to the outside of the screening box 1.

[0029] See Figure 3 and Figure 5 The multi-stage screening mechanism 3 includes four screening plates arranged sequentially from top to bottom. The two screening plates at the top are primary screening plates 31, and the two screening plates at the bottom are secondary screening plates 32. The two primary screening plates 31 at the top are inclined downward from left to right. The left end of the primary screening plate 31 at the top is located to the right of the left end of the primary screening plate 31 at the bottom, and the right end of the primary screening plate 31 at the right of the right end of the primary screening plate 31 at the bottom. The length of the primary screening plate 31 at the top is longer than that of the primary screening plate 31 at the bottom. The left end of the primary screening plate 31 at the top is located below the middle of the receiving channel 11. A diversion component 33 for limiting the flow of long fiber particles in the screening is provided above each of the two primary screening plates 31. The two secondary screening plates 32 below are inclined upward from left to right. The right end of the upper secondary screening plate 32 is located to the left of the right end of the lower secondary screening plate 32, and a baffle 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.

[0030] During operation, both the primary screening plate 31 and the secondary screening plate 32 have screening holes, with the diameter of the screening holes on the primary screening plate 31 being larger than that on the secondary screening plate 32. The primary screening plate 31 performs coarse screening of long fiber particles, while the secondary screening plate 32 performs further fine screening. The baffle plate 321 prevents a large number of long fiber particles from the lower primary screening plate 31 from entering the lower secondary screening plate 32. The secondary screening plate 32 extends the screening path. During screening, the long fiber particles entering the screening box 1 are first screened on the two primary screening plates 31. After the first screening, the long fiber particles on the upper primary screening plate 31 enter the lower secondary screening plate 32 for a second screening, and vice versa.

[0031] See 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 rotatably passes through the rear side of the screening box 1. Multiple detachable sleeves 22 are rotatably connected to the rotating roller 21. Multiple round grooves with barbs are opened on the detachable sleeves 22. Multiple rubber hoses are provided on each detachable sleeve 22.

[0032] In addition to the fiber filament mechanism 2, which collects fiber filament impurities from the passing long fiber particles, it should be noted that the length of the detachable sleeve 22 is shorter than the length of the long fiber particles. The fiber filament impurities will be wrapped around the rubber hose on the detachable sleeve 22. Multiple detachable sleeves 22 are rotatably connected to the rotating roller 21. Since the long fiber particles are relatively light, when they fall onto the detachable sleeve 22, they will be blocked by the rubber hose. The barbed grooves on the detachable sleeve 22 will scrape and collect the fiber filaments. Because the length of the detachable sleeve 22 is shorter than the length of the long fiber particles, if an adjacent detachable sleeve 22 rotates under the impact of a large number of long fiber particles, it will cause the long fiber particles on the detachable sleeve 22 to fall into the screening box 1.

[0033] See Figure 2 and Figure 3 Multiple top material blocks 121 are evenly arranged along the axial direction from front to back on the comb shaft 12. A drive source is provided at one end of the comb shaft 12, and the comb shaft 12 and the rotating roller 21 are connected by belt drive.

[0034] The rotation of the combing shaft 12 drives the top material block 121 to intermittently push the long fiber particles in the feed inlet, avoiding excessive feeding in a short period of time and causing blockage of the feed inlet.

[0035] See Figure 4The left end of the upper primary screening plate 31 is hinged to a material distribution plate 5 by a torsion spring. The material distribution plate 5 is located below the receiving channel 11. The left end of the material distribution plate 5 does not contact the left inner wall of the screening box 1. The initial tilt angle of the material distribution plate 5 is the same as the tilt angle of the upper primary screening plate 31.

[0036] In its natural state, the distribution plate 5 maintains the same tilt angle as the primary screening plate 31. When the number of falling long fiber particles is small, most of the long fiber particles will fall onto the distribution plate 5 and the upper part of the primary screening plate 31, while a small portion of the long fiber particles will fall onto the upper part of the lower primary screening plate 31. When the number of long fiber particles entering the screening box 1 is too large, the distribution plate 5 will tilt to the left, and the long fiber particles falling on the distribution plate 5 will fall onto the upper part of the lower secondary screening plate 32, so that the number of long fiber particles falling onto the upper primary screening plate 31 will not be too large.

[0037] See Figure 3 and Figure 5 The guide plates 4 are inclined 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 side of the guide plates 4 extends into the impurity outlet 14 corresponding to the rear side of the screening box 1. A baffle plate 41 is fixedly connected to the left side of the uppermost guide plate 4.

[0038] The guide plate 4 is designed to guide the metal fragments and stones after the long fiber particles are screened by the primary screening plate 31 and the secondary screening plate 32 to the outside of the screening box 1. Since the screening box 1 is always vibrating due to the vibration motor, the rear side of the guide plate 4 extends into the impurity outlet 14 to prevent impurities from falling into the screening box 1. The baffle plate 41 prevents long fiber particles from falling into the upper part of the guide plate 4 when they enter the lower primary screening plate 31.

[0039] See Figure 3 and Figure 4 The diversion component 33 includes a drive 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 drive shaft 331. A flow-limiting baffle 333 is uniformly fixedly connected to the sleeve 332 in the circumference. The distance from the left drive shaft 331 to the first-stage screening plate 31 is greater than the distance from the right drive shaft 331 to the first-stage screening plate 31. A linkage drive component is provided on the rear side of the screening box 1 and on the drive shaft 331.

[0040] Continue reading Figure 2The linkage drive assembly includes a transition rod 334 rotatably connected to the rear side of the screening box 1. The transition rod 334 is connected to the rotating roller 21 via a belt. A small diameter gear 335 is fixedly connected to the transition rod 334. A large diameter gear 336 is fixedly connected to the drive shaft 331 near the transition rod 334. The small diameter gear 335 meshes with the large diameter gear 336. The rear sides of the two drive shafts 331 located above the same primary screening plate 31 are connected via belt drive. One of the drive shafts 331 located above the upper drive shaft 331 is also connected to the corresponding drive shaft 331 located below the upper drive shaft 331 via belt drive.

[0041] The diversion component 33 is designed to maintain a relatively thin thickness of the falling long fiber particles during the screening process, preventing impurities at the top of thicker long fiber particles from failing to be screened in time. The flow-limiting baffle 333 is at a certain distance from the primary screening plate 31, and the baffle 333 effectively limits the flow of long fiber particles on the primary screening plate 31 during the left-to-right screening process. Because the flow-limiting baffle 333 and the upper part of the primary screening plate 31 form a space, excessive long fiber particles will be blocked in the space formed by the rotating shaft 331 and the primary screening plate 31. The rotating roller 21 drives the transition rod 334 to rotate, and a small straight section on the transition rod 334... The small diameter gear 335 meshes with the large diameter gear 336. Since the diameter of the small diameter gear 335 is smaller than the diameter of the large diameter gear 336, the rotation speed of the drive 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 in speed reduction. Multiple drive shafts 331 rotate synchronously through belts. The rotation of the drive shafts 331 drives the flow limiting baffle 333 to rotate. Since the distance from the left drive shaft 331 to the primary screening plate 31 is greater than the distance from the right drive shaft 331 to the primary screening plate 31, the screening thickness of long fiber particles located on the upper right side of the primary screening plate 31 is less than that of long fiber particles located on the upper left side of the primary screening plate 31.

[0042] See Figure 1 , Figure 3 and Figure 5It also includes a protective cover 6. The upper end of the protective cover 6 is provided with a channel corresponding to the position of the receiving channel 11. A feed bin 61 is fixedly connected in the channel. The bottom end of the feed bin 61 is movably placed in the receiving channel 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 placement cylinders 62. The front and rear inner walls of the protective cover 6 are fixedly connected with elastic lifting rods 63 corresponding to the positions of placement cylinders 62. The telescopic section of the elastic lifting rods 63 is movably arranged in the placement cylinders 62. 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. An impurity discharge port 65 is provided at the bottom end of the protective cover 6, and an outlet port 66 is provided at the bottom end of the protective cover 6 corresponding to the position of the inner outlet port 13. A cotton cloth tube 67 is fixedly connected between the inner outlet port 13 and the outlet port 66.

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

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency screening and detection machine for long fiber particles, characterized in that: The screen includes a screening box, with a receiving groove on the top of the screening box near the left side. A combing shaft is rotatably connected to the top of the receiving groove. A fiber removal mechanism is installed on the receiving groove below the combing shaft. An internal discharge port is opened at the bottom of the screening box. Four impurity outlets are opened from top to bottom on the rear side of the screening box. A vibration motor is installed on the screening box. A multi-stage screening mechanism is installed inside the screening box to screen long fiber particles; The guide plate is located below the multi-stage screening mechanism and is used to guide the screened impurities to the outside of the screening box. The multi-stage screening mechanism includes four screening plates arranged sequentially from top to bottom. The screening plates are fixedly connected to the inner wall of the screening box on the front and back sides. The two screening plates at the top are primary screening plates, and the two screening plates at the bottom are secondary screening plates. The two primary screening plates at the top are inclined downward from left to right, and a flow diversion component is provided above each of the two primary screening plates to limit the flow of long fiber particles during screening. The two secondary screening plates at the bottom are inclined upward from left to right. During the screening process, the long fiber particles entering the screening box are screened on two primary screening plates for the first screening operation. After the first screening, the long fiber particles on the upper primary screening plate are screened on the lower secondary screening plate for the second screening. After the first screening, the long fiber particles on the lower primary screening plate are screened on the upper secondary screening plate for the second screening. The diversion assembly includes a drive shaft rotatably connected to the front and rear sides of the screening box, wherein the distance from the left drive shaft to the primary screening plate is greater than the distance from the right drive shaft to the primary screening plate. The left end of the upper primary screening plate is hinged to a material distribution plate by a torsion spring. The material distribution plate is located below the receiving channel. The left end of the material distribution plate does not contact the left inner wall of the screening box. The tilt angle of the material distribution plate is the same as that of the upper primary screening plate.

2. The long fiber particle high efficiency screening and detecting machine according to claim 1, characterized in that: 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 rotatably passes through the rear side of the screening box. Multiple detachable sleeves are rotatably connected to the rotating roller. Multiple round grooves with barbs are opened on the detachable sleeves. Multiple rubber hoses are provided on each detachable sleeve.

3. The long fiber particle high efficiency screening and detecting machine according to claim 1, characterized in that: A sleeve is fixedly fitted on the outer wall of the drive shaft. A flow-limiting baffle is uniformly fixedly connected to the circumference of the sleeve. A linkage drive assembly is set on the rear side of the screening box and on the drive shaft.

4. The long fiber particle high efficiency screening and detecting machine according to claim 3, characterized in that: The linkage drive assembly includes a transition rod rotatably connected to the rear side of the screening box. The transition rod is connected to the rotating roller via a belt drive. A small-diameter gear is fixedly connected to the transition rod. A large-diameter gear is fixedly connected to the drive shaft near the transition rod. The small-diameter gear meshes with the large-diameter gear. The rear sides of two drive shafts located above the same primary screening plate are connected via belt drive. One of the drive shafts located above the upper drive shaft is also connected to the corresponding drive shaft located below the lower drive shaft via belt drive.

5. The long fiber particle high efficiency screening and detecting machine according to claim 1, characterized in that: It also includes a protective cover, with a through groove at the upper end of the protective cover corresponding to the position of the receiving through groove. A feed hopper is fixedly connected inside the through groove, and the bottom end of the feed hopper is movably placed inside the receiving through groove. A placement cylinder is fixedly connected to both the front and rear ends of the screening box. An elastic lifting rod is fixedly connected to the front and rear inner walls of the protective cover corresponding to the position of the placement cylinder. The telescopic section of the elastic lifting rod is movably set inside the placement cylinder. 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.

6. The long fiber particle high efficiency screening and detecting machine according to claim 1, characterized in that: The guide plates are inclined downwards 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 side of the guide plates extends into the impurity outlet corresponding to the rear side of the screening box. A baffle plate is fixedly connected to the left side of the uppermost guide plate.

7. The high-efficiency screening and detection machine for long fiber particles according to claim 5, characterized in that: Multiple top material blocks are evenly arranged along the axial direction from front to back on the comb shaft, and the top material blocks are located at the bottom of the feed hopper. A drive source is provided at one end of the comb shaft, and the comb shaft and the rotating roller are connected by belt drive.

8. The long fiber particle high efficiency screening and detecting machine according to claim 1, characterized in that: The right end of the upper secondary screening plate is located to the left of the right end of the lower secondary screening plate, and a baffle plate is fixedly connected to the right side of the upper secondary screening plate. The left ends of both secondary screening plates do not abut against the inner wall of the screening box. The left end of the upper primary screening plate is located to the right of the left end of the lower primary screening plate, and the right end of the upper primary screening plate is located to the right of the right end of the lower primary screening plate. The length of the upper primary screening plate is longer than that of the lower primary screening plate, and the left end of the upper primary screening plate is located below the middle of the receiving channel. The diameter of the screening holes on the primary screening plate is larger than that on the secondary screening plate.

9. The long fiber particle high efficiency screening and detecting machine according to claim 5, characterized in that: The bottom of the protective cover has an impurity discharge port, and the bottom of the protective cover has an external discharge port corresponding to the position of the internal discharge port. A cotton cloth tube is fixedly connected between the internal discharge port and the external discharge port.

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