Particle sizing device

Abstract

This invention relates to the field of particle screening technology, specifically disclosing a particle screening device, including a housing and a conveying unit. One end of the housing is higher than the other end. The conveying unit includes movable rods and a drive shaft. A first positioning groove is provided on one side of the movable rod. The drive shaft includes multiple first crankshafts and multiple second crankshafts. The shaft sections of the first and second crankshafts are all engaged with the first positioning grooves on the corresponding movable rods. The drive shaft can drive the multiple movable rods to move up and down. The cooperation between the multiple movable rods and the multiple drive shafts of this invention can screen materials. At the same time, the rotation between two adjacent drive shafts can prevent materials from getting stuck between the two adjacent drive shafts. The drive shaft can drive the movement between two adjacent movable rods to prevent materials from getting stuck between the two adjacent movable rods. The two adjacent movable rods reciprocate up and down under the drive of the drive shaft to rub the two sides of the material and scrape off the mud and sand on the material.

Description

Technical Field

[0001] This invention relates to the field of technology, and specifically to a particle screening device. Background Technology

[0002] After the ore is mined, it needs to be crushed and screened. The crushed ore is mostly irregular in shape and has sharp corners on the surface. During the screening process, the irregular shape and sharp corners of the ore can easily clog the screen holes, affecting the efficiency of the ore screening.

[0003] The patent document with authorization publication number CN108620309B discloses a multi-stage ore screening device, including a main box body, which is a square cylindrical shape with openings at the top and bottom. The upper part is an upward-facing trumpet-shaped feed inlet, and two opposite side walls are respectively set at the first outlet and the second outlet; a first screener, which is fixed in the main box body and located at the upper part of the main box body, with its lower end facing the first outlet; a second screener, which is fixed in the main box body and located at the lower part of the main box body, located directly below the first screener, with its lower end facing the second outlet; and a discharge rack, which is located directly below the main box body. The discharge rack includes a support and three discharge ports, which are arranged side by side. This screening device uses a first screen rod, a second screen rod, and spacers to screen ore. The rotation of the first screen rod prevents ore from getting stuck between the first and second screen rods, and the spacers prevent long strips of ore from falling. However, since the spacers are fixed, ore can easily get stuck between adjacent spacers, affecting subsequent filtration. Therefore, a particle screening device is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] This invention provides a particle screening device, which aims to solve the technical problem in related technologies where, because the spacers are fixed, ore easily gets stuck between two adjacent spacers, thus affecting the subsequent filtration of the ore.

[0005] The particle screening device of the present invention includes:

[0006] The box has a feeding hopper at one end, a discharge port at the other end, an inclined discharge port on one side, and one end of the box is higher than the other end.

[0007] A conveying unit, installed inside the housing, is used to screen materials while preventing them from getting stuck in the screening holes. The conveying unit includes:

[0008] The movable rod has multiple movable rods arranged along the length of the box body, and a first positioning groove is provided on one side of the movable rod;

[0009] The drive shaft has multiple shafts arranged along the width direction of the housing. Filter holes for screening materials are formed between the multiple movable rods and the drive shaft. The drive shaft includes multiple first crankshafts and multiple second crankshafts connected end to end. The shaft segments of the first and second crankshafts are engaged with the first positioning grooves on the corresponding movable rods. The drive shaft can drive the multiple movable rods to move up and down.

[0010] Preferably, a crankshaft is formed between the plurality of first crankshafts and the plurality of second crankshafts.

[0011] Preferably, a plurality of second positioning grooves are provided on the other side of the movable rod. The second positioning grooves correspond to the first positioning grooves. The width of the first positioning groove is greater than the width of the second positioning groove. The shaft segments of the first crankshaft and the second crankshaft are both engaged with the second positioning grooves on the corresponding movable rods.

[0012] Preferably, the first crankshaft and the second crankshaft are rotatably arranged, the end of the first crankshaft near the second crankshaft is provided with a groove, and the end of the second crankshaft near the first crankshaft is connected to a slider that rotates in the groove, and an eccentric shaft is formed between the plurality of first crankshafts and the plurality of second crankshafts.

[0013] Preferably, mounting plates are connected to both ends of the interior of the housing, and positioning elastic elements are provided at both ends of the movable rod, the positioning elastic elements including:

[0014] A fixing sleeve is fitted onto the movable rod;

[0015] A support rod, which is connected to a fixed sleeve and vertically penetrates the mounting plate;

[0016] A limiting plate, which is connected to the lower end of the support rod;

[0017] A spring, which is located between the limiting plate and the mounting plate and is sleeved on the support rod.

[0018] Preferably, the end of the housing away from the discharge port is provided with multiple mounting slots, and one end of the housing is provided with a clamping unit for limiting the rotational position of the movable rod, the clamping unit comprising:

[0019] A lead screw, one end of which passes through the housing and extends into the mounting groove;

[0020] A guide rod, which is connected to the mounting groove and is arranged parallel to the lead screw;

[0021] The limiting plate has two plates, both of which slide between the lead screw and the guide rod. The lead screw located in the mounting groove has two opposite threaded sections, and the two limiting plates are used in conjunction with the two threaded sections respectively.

[0022] Preferably, one end of each of the two movable rods is a rectangular rod located between two limiting plates, one end of the rectangular rod is connected to a handle, and one end of the lead screw is connected to a knob.

[0023] Preferably, a liquid outlet pipe is connected to one side of the box body, and a plurality of equally spaced spray pipes are connected to the side of the liquid outlet pipe facing the box body. The spray pipes extend through the box body into the box body, and a plurality of equally spaced nozzles are connected to the lower side of the spray pipes.

[0024] Preferably, a drive unit is provided on the side of the housing away from the discharge port, and the drive unit includes:

[0025] An electric motor is connected to the housing, and a drive gear is connected to the output end of the motor;

[0026] Driven gears, the number of which is equal to the number of drive shafts, are mounted on one end of the drive shafts;

[0027] The drive gear and multiple driven gears are connected by a drive chain.

[0028] Preferably, a tensioning wheel rotatably connected to the housing is provided between two adjacent driven gears.

[0029] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0030] 1. The cooperation between multiple movable rods and multiple drive shafts can screen materials. At the same time, the rotation between two adjacent drive shafts can prevent materials from getting stuck between them. The drive shaft can drive the movement between two adjacent movable rods to prevent materials from getting stuck between them. The two adjacent movable rods move up and down in reciprocating motion driven by the drive shaft to rub the sides of the material and scrape off the mud and sand on the material.

[0031] 2. The engagement between the crankshaft and the second positioning groove on the movable rod enables the two adjacent movable rods to reciprocate up and down, thereby rubbing the sides of the material and scraping off the mud and sand. In addition, the engagement between the crankshaft and the first positioning groove on the movable rod enables multiple movable rods to achieve a wave-like motion, while also allowing adjacent movable rods to move alternately. This facilitates the transport of large pieces of material and prevents large pieces of material from having a large contact area with the conveying unit, which would cause the material to move slowly and affect the subsequent screening of materials.

[0032] 3. The cooperation between the chute and the slider enables the rotation between the first crankshaft and the second crankshaft, making the first crankshaft and the second crankshaft eccentrically positioned. The eccentricity between multiple first crankshafts and multiple second crankshafts enables the drive shaft to drive multiple movable rods to move up and down synchronously, thereby achieving a vibration effect by rapidly moving multiple movable rods up and down, thus improving the efficiency of material screening. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the front structure of the screening device of the present invention.

[0034] Figure 2 This is a schematic diagram of the rear structure of the screening device of the present invention.

[0035] Figure 3 This is a structural schematic diagram of the cross-section of the box body of the present invention.

[0036] Figure 4 This is a structural schematic diagram of the third form of the conveying unit of the present invention.

[0037] Figure 5 This is the present invention. Figure 1 An enlarged schematic diagram of the structure at point A in the middle.

[0038] Figure 6 This is the present invention. Figure 2 Enlarged schematic diagram of the structure at point B.

[0039] Figure 7 This is a schematic diagram of the second form of the conveying unit of the present invention.

[0040] Figure 8 This is a structural schematic diagram of the third form of the conveying unit of the present invention.

[0041] Figure 9 This is a schematic diagram of the drive shaft of the present invention.

[0042] Figure 10 This is a schematic diagram of the structure of the first crankshaft of the present invention.

[0043] Figure label:

[0044] 1. Housing; 2. Discharge pipe; 3. Drive unit; 4. Conveying unit; 5. Positioning elastic element; 8. Support leg; 11. Feed hopper; 12. Discharge port; 13. Leakage hole; 14. Mounting groove; 15. Mounting plate; 21. Spray pipe; 22. Nozzle; 41. Movable rod; 42. Drive shaft; 401. First positioning groove; 402. Second positioning groove; 403. Rectangular rod; 404. Handle; 421. First crankshaft; 422. Second crankshaft; 4211. Slide groove; 4221. Slider; 51. Fixed sleeve; 52. Support rod; 53. Spring; 54. Limiting plate; 61. Lead screw; 62. Limiting plate; 63. Guide rod; 64. Knob; 71. Motor; 72. Drive gear; 73. Driven gear; 74. Transmission chain; 75. Tensioner wheel. Detailed Implementation

[0045] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0046] like Figures 1 to 3 As shown, the particle screening device provided by the present invention includes a housing 1. A feed hopper 11 is located at one end of the housing 1. A liquid outlet pipe 2 is fixedly connected to one side of the housing 1. Multiple equally spaced spray pipes 21 are fixedly connected to the side of the liquid outlet pipe 2 facing the housing 1. The spray pipes 21 penetrate the housing 1 and extend into its interior. Multiple equally spaced nozzles 22 are fixedly connected to the lower side of the spray pipes 21. The nozzles 22 can clean the material and remove adhering mud and sand. A discharge port is located at the other end of the housing 1, and a discharge outlet is located on one side of the housing 1. The bottom surface of the discharge port 12 is inclined, and multiple equally spaced perforations 13 are opened on the bottom surface of the discharge port 12. The perforations 13 can filter out the liquid in the screened material. Support legs 8 are connected to both ends of the lower part of the box body 1. The support legs 8 are threaded to the box body 1. The feed end of the box body 1 is higher than the discharge end of the box body 1. Specifically, the box body 1 is inclined by four support legs 8. The four support legs 8 can adjust the tilt angle of the box body 1. The inclined setting of the box body 1 can realize the material flowing from top to bottom under the action of gravity. The box body 1 is equipped with a conveying unit 4 for screening materials. The conveying unit 4 can prevent materials from getting stuck in the screening holes while screening materials, so as to prevent affecting the screening of subsequent materials. A drive unit 3 is set on the side of the box body 1 away from the discharge port 12. The drive unit 3 can drive the conveying unit 4 to work. In other embodiments, the conveying unit 4 is divided into multiple layers, and the multiple-layer conveying unit 4 is arranged sequentially from the top of the box 1 to the bottom of the box 1, so as to realize multi-level screening of materials.

[0047] like Figure 3 and Figure 4As shown, the conveying unit 4 includes multiple movable rods 41 and multiple drive shafts 42. The movable rods 41 are arranged along the length direction of the housing 1, and the drive shafts 42 are arranged along the width direction of the housing 1 and rotate within the housing 1. The multiple movable rods 41 and drive shafts 42 are arranged alternately with equal vertical spacing. Filter holes for screening materials are formed between the multiple movable rods 41 and drive shafts 42. The filter holes correspond to the discharge port 12. Multiple first positioning grooves 401 are provided on one side of the movable rods 41, and multiple second positioning grooves 402 are provided on the other side of the movable rods 41. The width of the first positioning grooves 401 is greater than the width of the second positioning grooves 402. The drive shafts 42 include multiple first crankshafts 421 and multiple second crankshafts 422. The width of the second positioning grooves 402 is equal to the diameter of the shaft segment of the first crankshafts 421. The multiple first crankshafts 421 and multiple second crankshafts 422 are connected end to end, forming a crankshaft. The crankshaft is used in conjunction with the second positioning grooves 402.

[0048] In this embodiment, the cooperation between multiple movable rods 41 and multiple drive shafts 42 can screen the material. At the same time, the rotation between two adjacent drive shafts 42 can prevent the material from getting stuck between the two adjacent drive shafts 42. The drive shafts 42 can drive the movement between two adjacent movable rods 41 to prevent the material from getting stuck between the two adjacent movable rods 41.

[0049] The engagement between the crankshaft and the second positioning groove 402 on the movable rod 41 can drive the two adjacent movable rods 41 to move up and down reciprocally, so as to rub the two sides of the material and scrape off the mud and sand on the material.

[0050] In addition, the cooperation between the crankshaft and the first positioning groove 401 on the movable rod 41 can drive multiple movable rods 41 to achieve wave-like movement, and at the same time achieve the staggered movement of two adjacent movable rods 41, which can transport large pieces of material and avoid the large contact area between large pieces of material and the conveying unit 4, which would cause the material to move slowly and affect the subsequent screening of materials.

[0051] like Figure 2 and Figure 4As shown, mounting plates 15 are fixedly connected to both ends of the housing 1. Positioning elastic elements 5 are provided at both ends of the movable rod 41. These positioning elastic elements 5 enable the movable rod 41 to quickly return to its original position, ensuring that the movable rod 41 remains in contact with the drive shaft 42. The positioning elastic element 5 includes a fixed sleeve 51, a support rod 52, a spring 53, and a limiting plate 54. The fixed sleeve 51 is fitted onto the movable rod 41. Specifically, the diameters at both ends of the movable rod 41 are smaller than the diameter at its middle section to prevent the movable rod 41 from disengaging from the fixed sleeve 51 during movement along the length of the housing 1. The support rod 52 is fixedly connected to the fixed sleeve 51 and vertically penetrates the mounting plate 15. The limiting plate 54 is fixedly connected to the lower end of the support rod 52. The spring 53 is located between the limiting plate 54 and the mounting plate 15 and is fitted onto the support rod 52. The spring 53 provides a downward pressure to the fixed sleeve 51, thus limiting the movement of the movable rod 41.

[0052] like Figure 5 and Figure 7 As shown, one end of the housing 1 is provided with a clamping unit for limiting the rotational position of the movable rod 41. The clamping unit is located on the housing 1 and near the end of the feed hopper 11. Multiple mounting slots 14 are provided at the end of the housing 1 away from the discharge port. The clamping unit includes a lead screw 61, a limiting plate 62, and a guide rod 63. One end of the lead screw 61 passes through the housing 1 and extends into the mounting slot 14. The guide rod 63 is connected within the mounting slot 14 and is arranged parallel to the lead screw 61. There are two limiting plates 62, which slide between the lead screw 61 and the guide rod 63. The lead screw 61 located within the mounting slot 14 has two opposite threaded sections. The limiting plate 62 is used in conjunction with two threaded sections. The two threaded sections are arranged in opposite directions, which can drive the limiting plate 62 to move relative to each other and limit the position of the rectangular rod 403. One end of the two movable rods 41 is a rectangular rod 403 and is located between the two limiting plates 62. One end of the rectangular rod 403 is fixedly connected to a handle 404. The handle 404 can switch the first positioning groove 401 and the second positioning groove 402 on the movable rod 41 to realize different movement modes of the movable rod 41 and achieve different screening effects for material screening. One end of the lead screw 61 is fixedly connected to a knob 64, which can drive the lead screw 61 to rotate.

[0053] In this embodiment, the lead screw 61 can drive the two limiting plates 62 to approach the rectangular rod 403, so that the two limiting plates 62 limit the position of the rectangular rod 403, thereby limiting the position of the rotated movable rod 41 and preventing the movable rod 41 from rotating on its own during the movement.

[0054] like Figures 8 to 10The first crankshaft 421 and the second crankshaft 422 are rotatably arranged between each other. The first crankshaft 421 is provided with a groove 4211 at one end near the second crankshaft 422. The second crankshaft 422 is fixedly connected to a slider 4221 that rotates in the groove 4211 at one end near the first crankshaft 421. An eccentric shaft is formed between the multiple first crankshafts 421 and the multiple second crankshafts 422.

[0055] In this embodiment, the cooperation between the slide groove 4211 and the slider 4221 enables the rotation between the first crankshaft 421 and the second crankshaft 422, so that the first crankshaft 421 and the second crankshaft 422 are arranged as an eccentric shaft. The eccentric shaft is formed between the multiple first crankshafts 421 and the multiple second crankshafts 422. The cooperation between the eccentric shaft and the first positioning groove 401 enables the drive shaft 42 to drive the multiple movable rods 41 to move up and down synchronously, so as to achieve the vibration effect of the multiple movable rods 41 moving up and down rapidly, thereby improving the working efficiency of material screening.

[0056] like Figure 6 As shown, the drive unit 3 includes a motor 71, a drive gear 72, driven gears 73, and a transmission chain 74. The motor 71 is fixedly connected to the housing 1. The drive gear 72 is installed on the output end of the motor 71. The number of driven gears 73 is equal to the number of drive shafts 42. The driven gears 73 are installed on one end of the drive shafts 42. The drive gear 72 and the multiple driven gears 73 are connected by the transmission chain 74. The cooperation between the drive gear 72 and the transmission chain 74 can drive the drive shafts 42 on the multiple driven gears 73 to rotate synchronously. A tensioning wheel 75 is rotatably connected to the housing 1 between two adjacent driven gears 73. The tensioning wheel 75 can ensure the tightness of the transmission chain 74 between two adjacent driven gears 73 and prevent the driven gears 73 from slipping during rotation.

[0057] Working principle of this invention:

[0058] The material first enters the housing 1 from the feed hopper 11. Due to the inclined setting of the housing 1, the material flows from top to bottom. At the same time, the motor 71 rotates forward, driving the drive gear 72 to rotate. The drive gear 72 drives the drive shaft 42 on the driven gear 73 to rotate through the transmission chain 74. At this time, the first crankshaft 421 and the second crankshaft 422 are in a crankshaft-like configuration. Figure 4As shown, multiple movable rods 41 achieve wave-like movement under the rotational cooperation of the first crankshaft 421, the second crankshaft 422, and the second positioning groove 402. When one of two adjacent movable rods 41 is at the crest of the wave, the other movable rod 41 is at the trough of the wave, so as to realize the transportation of large pieces of material and avoid the large contact surface between large pieces of material and the conveying unit 4, which would cause the material to move slowly and affect the subsequent screening of materials. The cooperation between multiple movable rods 41 and multiple drive shafts 42 can screen the material. At the same time, the rotation between two adjacent drive shafts 42 can prevent the material from getting stuck between the two adjacent drive shafts 42. The drive shafts 42 can drive the movement between two adjacent movable rods 41 to prevent the material from getting stuck between the two adjacent movable rods 41. Then, during the screening process, liquid is sprayed onto the material through the nozzle 22 to clean the mud and sand on the material. Finally, after screening and cleaning, the material flows out through the discharge port 12, and the unscreened material flows out from the discharge port.

[0059] By rotating the handle 404, the movable rod 41 is rotated, so that the first positioning groove 401 corresponds to the first crankshaft 421 or the second crankshaft 422. At this time, the first crankshaft 421 and the second crankshaft 422 are in a crankshaft shape. Figure 7 As shown, since the width of the first positioning groove 401 is greater than the width of the second positioning groove 402, the drive shaft 42 can drive the two adjacent movable rods 41 to move up and down reciprocally, so as to rub the two sides of the material and scrape off the mud and sand on the material.

[0060] Motor 71 reverses, causing the first crankshaft 421 and the second crankshaft 422 to be arranged eccentrically. Figure 8 As shown, the drive shaft 42 can drive two adjacent movable rods 41 to move up and down synchronously, so that the conveying unit 4 has a vibration effect and can quickly screen the material. At the same time, due to the reverse rotation of the motor 71, the drive shaft 42 moves towards the feed hopper 11 of the box 1. Due to the tilt angle of the box 1, the downward force of the material's own weight is greater than the force of the material moving back, so it does not affect the downward flow of the material. This state is for screening small materials.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A particle screening device, characterized in that, include: Box (1), one end of box (1) has a feed hopper (11), the other end of box (1) has a discharge port, one side of box (1) has an inclined discharge port (12), one end of box (1) is higher than the other end of box (1); Conveying unit (4), the conveying unit (4) is installed inside the housing (1), the conveying unit (4) can screen materials while preventing materials from getting stuck in the screening holes, the conveying unit (4) includes: Movable rod (41), multiple movable rods (41) are arranged along the length direction of the box (1), and a first positioning groove (401) is provided on one side of the movable rod (41). The drive shaft (42) has multiple shafts arranged along the width direction of the housing (1). A filter hole for screening materials is formed between the multiple movable rods (41) and the drive shaft (42). The drive shaft (42) includes multiple first crankshafts (421) and multiple second crankshafts (422). The multiple first crankshafts (421) and multiple second crankshafts (422) are connected end to end. The shaft segments of the first crankshafts (421) and the second crankshafts (422) are engaged with the first positioning groove (401) on the corresponding movable rods (41). The drive shaft (42) can drive the multiple movable rods (41) to move up and down. A crankshaft is formed between multiple first crankshafts (421) and multiple second crankshafts (422); On the other side of the movable rod (41), a plurality of second positioning grooves (402) are provided. The second positioning grooves (402) correspond to the first positioning grooves (401). The width of the first positioning groove (401) is greater than the width of the second positioning grooves (402). The shaft segments of the first crankshaft (421) and the second crankshaft (422) are both engaged with the second positioning grooves (402) on the corresponding movable rod (41). The first crankshaft (421) and the second crankshaft (422) are rotatably arranged between each other. The first crankshaft (421) has a groove (4211) at one end near the second crankshaft (422), and the second crankshaft (422) is connected to a slider (4221) that rotates in the groove (4211) at one end near the first crankshaft (421). An eccentric shaft is formed between the multiple first crankshafts (421) and the multiple second crankshafts (422).

2. The particle screening device according to claim 1, characterized in that, The housing (1) has mounting plates (15) connected to both ends inside, and the movable rod (41) has positioning elastic elements (5) at both ends. The positioning elastic elements (5) include: A fixing sleeve (51) is fitted onto the movable rod (41); Support rod (52), which is connected to the fixing sleeve (51) and vertically penetrates the mounting plate (15); A limiting plate (54) is connected to the lower end of a support rod (52); Spring (53) is located between the limiting plate (54) and the mounting plate (15) and is sleeved on the support rod (52).

3. The particle screening device according to claim 2, characterized in that, The box (1) has multiple mounting slots (14) at one end away from the discharge port, and a clamping unit for limiting the rotational position of the movable rod (41) is provided at one end of the box (1). The clamping unit includes: A lead screw (61), one end of which passes through the housing (1) and extends into the mounting groove (14); Guide rod (63), the guide rod (63) is connected in the mounting groove (14) and is arranged parallel to the lead screw (61); The limiting plate (62) has two plates, both of which slide between the lead screw (61) and the guide rod (63). The lead screw (61) located in the mounting groove (14) has two opposite threaded sections, and the two limiting plates (62) are used in conjunction with the two threaded sections respectively.

4. The particle screening device according to claim 3, characterized in that, One end of each of the two movable rods (41) is a rectangular rod (403) and is located between two limiting plates (62). One end of the rectangular rod (403) is connected to a handle (404), and one end of the lead screw (61) is connected to a knob (64).

5. The particle screening device according to claim 1, characterized in that, One side of the box (1) is connected to a liquid outlet pipe (2), and the side of the liquid outlet pipe (2) facing the box (1) is connected to a plurality of equally spaced spray pipes (21). The spray pipes (21) penetrate the box (1) and extend into the box (1). The lower side of the spray pipes (21) is connected to a plurality of equally spaced nozzles (22).

6. The particle screening device according to claim 1, characterized in that, A drive unit (3) is provided on the side of the housing (1) away from the discharge port (12), and the drive unit (3) includes: Motor (71), the motor (71) is connected to the housing (1), and a drive gear (72) is connected to the output end of the motor (71). Driven gears (73), the number of which is equal to the number of drive shafts (42), and the driven gears (73) are mounted on one end of the drive shafts (42); The drive gear (72) and the multiple driven gears (73) are connected by the drive chain (74).

7. The particle screening device according to claim 6, characterized in that, A tensioning wheel (75) rotatably connected to the housing (1) is provided between two adjacent driven gears (73).

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