A filter aid screening apparatus

Abstract

The utility model belongs to filter aid processing equipment technical field especially is a kind of filter aid screening equipment, including base, the base is equipped with miscellaneous groove, further include: movable support seat;Screening box;Perforated sieve plate;Driving assembly, the driving assembly is set in the outer wall of screening box;Power mechanism, the power mechanism is used to drive movable support seat reciprocating movement along horizontal direction;And collection drawer, the collection drawer is pullably located in the miscellaneous groove;Two groups of perforated sieve plate are set to realize two-stage screening, power mechanism drives screening box reciprocating oscillation along horizontal direction, improves screening efficiency, guarantees the sufficiency of screening;Two perforated sieve plates are driven by driving assembly to reverse direction synchronous overturning, the inclination angle of perforated sieve plate can be adjusted, suitable for the screening demand of different filter aids;Collection drawer is used to collect tiny impurities, and collection drawer uses pull-out type installation, easy to install and use and disassemble cleaning, improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of filter aid processing equipment, specifically relating to a filter aid screening device. Background Technology

[0002] During the production and processing of filter aids, they need to be graded and screened according to particle size to meet the needs of different application scenarios.

[0003] Existing filter aid sieving equipment mostly adopts a single screen structure, which can only achieve single-level sieving. If multi-level sieving is required, multiple operations are needed, resulting in low efficiency. At the same time, existing equipment has poor adaptability to filter aids with different particle sizes, making it difficult to flexibly adjust sieving parameters and lacking practicality.

[0004] To address the aforementioned problems, this utility model proposes a filter aid sieving device. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a filter aid screening device, which features a simple structure, ease of operation, and high screening efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a filter aid sieving device, including a base, the base being provided with a collection trough, and further comprising:

[0007] Two movable support bases are symmetrically distributed and movably installed on both sides of the base;

[0008] A screening box, which is fixed to the top of the movable support base, has two sets of transverse through openings.

[0009] A porous sieve plate, wherein two porous sieve plates are spaced apart along the material screening direction, the ends of the porous sieve plates extend out of the opening and are rotatably installed in the screening box, and the sieve holes of the upper porous sieve plate are larger than the sieve holes of the lower porous sieve plate;

[0010] A drive assembly is disposed on the outer wall of the screening box and is used to drive the two porous screen plates to rotate synchronously in opposite directions.

[0011] A power mechanism, wherein the power mechanism is used to drive the movable support to reciprocate horizontally; and

[0012] A collection drawer is provided in the collection trough and can be pulled out.

[0013] As a preferred embodiment of this utility model, the driving component includes:

[0014] The first turntable, wherein the porous screen plate is rotatably mounted in the screening box by means of a pin, the pin passing through the side wall of the screening box, and the first turntable is fixed to the protruding end of the pin;

[0015] A movable seat that moves along the outer side of the screening box;

[0016] The first swing arm, two first swing arms are symmetrically distributed, and one end of the first swing arm is pivotally connected to the eccentric position of the first turntable by means of a pin, and the other end is pivotally connected to the moving seat by means of a pin.

[0017] Two fixing plates are fixed at intervals to the outer wall of the screening box;

[0018] A threaded screw, rotatably disposed between the two fixed plates, wherein the movable seat is threadedly engaged with the threaded screw; and

[0019] The first servo motor is fixed to the outer wall of the fixed plate and is used to drive the threaded screw to rotate.

[0020] As a preferred embodiment of this utility model, the driving component further includes:

[0021] Two first guide rods are symmetrically fixed between the two fixed plates and pass through the movable seat.

[0022] As a preferred embodiment of this utility model, it further includes a linkage component, wherein the two sets of drive components are symmetrically arranged on two opposite outer sides of the screening box, and the linkage component includes:

[0023] A rotating rod, which is fixedly connected to the end of the threaded screw;

[0024] Synchronizing pulleys, each fixed to one of the two rotating rods; and

[0025] A timing belt, which is tensioned by two timing belts.

[0026] As a preferred embodiment of this utility model, the power mechanism includes:

[0027] A guide assembly, disposed on the base, is used to guide the horizontal movement of the movable support.

[0028] A connecting rod, which is fixed to the ends of the two movable support seats;

[0029] A cantilever plate, the cantilever plate being fixed to the end of the base;

[0030] The second turntable is rotatably mounted on the top surface of the cantilever plate;

[0031] The second swing arm, one end of which is pivotally connected to the connecting rod by a pin, and the other end of which is pivotally connected to the eccentric position of the second turntable by a pin; and

[0032] The second servo motor is fixed to the bottom surface of the cantilever plate and is used to drive the second turntable to rotate.

[0033] As a preferred embodiment of this utility model, the guide component includes:

[0034] Limiting plates, two of which are fixed at intervals to the outer wall of the base, and the movable support seat is located between the two limiting plates;

[0035] A second guide rod, fixed between the two limiting plates and passing through the movable support base; and

[0036] Telescopic springs are distributed between both ends of the movable support and the corresponding limiting plates, and are sleeved on the second guide rod.

[0037] As a preferred embodiment of this utility model, it further includes a limiting mechanism, which locks the collection drawer in place after it is pushed into the collection groove. The limiting mechanism includes:

[0038] L-shaped limit block;

[0039] Mounting rod, which is fixed to the outer wall of the base and passes through the L-shaped limiting block, and a limiting plate is fixed to the protruding end of the mounting rod;

[0040] A reset spring is sleeved on the mounting rod and positioned between the L-shaped limiting block and the limiting plate.

[0041] As a preferred embodiment of this utility model, the limiting mechanism further includes:

[0042] A pull ring is fixed to the outer wall of the L-shaped limiting block.

[0043] As a preferred embodiment of this utility model, the end of the collection drawer is fixed with a handle.

[0044] Compared with the prior art, the beneficial effects of this utility model are:

[0045] 1. Two-stage screening is achieved by setting two sets of perforated sieve plates. The power mechanism drives the screening box to reciprocate in the horizontal direction, which improves screening efficiency and ensures sufficient screening.

[0046] 2. The two porous sieve plates are driven to rotate synchronously in opposite directions by the drive component. The tilt angle of the porous sieve plates can be adjusted to meet the screening requirements of different filter aids.

[0047] 3. The collection drawer is used to collect tiny impurities, and the collection drawer is installed by pulling out, which is easy to install, use, disassemble and clean, thus improving work efficiency.

[0048] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0049] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0050] Figure 1 This is a schematic diagram of the structure of this utility model;

[0051] Figure 2 This utility model Figure 1 A schematic diagram of the enlarged structure of the driving component in the diagram;

[0052] Figure 3 This utility model Figure 1 A magnified schematic diagram of the linkage components in the diagram;

[0053] Figure 4 This is a schematic diagram of the isometric structure of the power mechanism in this utility model;

[0054] Figure 5 This utility model Figure 1 A magnified schematic diagram of the limiting mechanism in the middle.

[0055] In the diagram: 1. Base; 11. Collection trough; 2. Movable support seat; 3. Screening box; 31. Opening; 4. Perforated sieve plate; 5. Drive assembly; 51. First turntable; 52. Movable seat; 53. First swing arm; 54. Fixed plate; 55. Threaded screw; 56. First servo motor; 57. First guide rod; 6. Linkage assembly; 61. Rotating rod; 62. Synchronous pulley; 63. Synchronous belt; 7. Power mechanism; 71. Guide assembly; 711. Limiting plate; 712. Second guide rod; 713. Telescopic spring; 72. Connecting rod; 73. Cantilever plate; 74. Second turntable; 75. Second swing arm; 76. Second servo motor; 8. Collection drawer; 81. Handle; 9. Limiting mechanism; 91. L-shaped limiting block; 92. Mounting rod; 93. Limiting plate; 94. Return spring; 95. Pull ring. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0057] Please see Figures 1-5 The present invention provides the following technical solution: a filter aid sieving device, including a base 1, the base 1 having a collection trough 11, and further including: a movable support 2, a sieving box 3, a porous sieve plate 4, a drive assembly 5, a power mechanism 7, and a collection drawer 8.

[0058] Furthermore, by Figure 1 As shown, in this embodiment, two movable support seats 2 are symmetrically distributed and movably installed on both sides of the base 1. The screening box 3 is fixed to the top of the movable support seat 2. Two sets of transversely penetrating openings 31 are provided on the screening box 3. Two perforated screen plates 4 are distributed at intervals along the material screening direction. The ends of the perforated screen plates 4 extend out of the openings 31 and are rotatably installed inside the screening box 3. The screen holes of the upper perforated screen plate 4 are larger than those of the lower perforated screen plate 4. The driving component 5 is set on the outer wall of the screening box 3 and is used to drive the two perforated screen plates 4 to rotate synchronously in opposite directions. The power mechanism 7 is used to drive the movable support seat 2. The movable support 2 moves back and forth in the horizontal direction, and the collection drawer 8 is pulled out and installed in the collection trough 11. After adopting the above scheme, when using it, the filter aid material to be screened is first put into the feed port at the top of the screening box 3. After starting the power mechanism 7, it drives the two symmetrical movable support 2 to move back and forth in a straight line along the horizontal direction of the base 1. Since the screening box 3 is fixed at the top of the movable support 2, the screening box 3 moves back and forth horizontally in sync with the movable support 2, so that the filter aid material in the box generates a lateral dispersion force on the porous screen plate 4, avoiding the local accumulation of material on the porous screen plate 4.

[0059] At the same time, the drive assembly 5 is activated, which drives the upper and lower porous sieve plates 4 to flip synchronously in opposite directions: for example, the upper porous sieve plate 4 flips down towards the inside of the screening box 3, while the lower porous sieve plate 4 slowly flips up towards the outside of the screening box 3, and the tilt angle of the two porous sieve plates 4 is adjusted synchronously to suit the screening needs of different filter aids.

[0060] Because the sieve holes of the upper porous sieve plate 4 are larger than those of the lower porous sieve plate 4, under the action of the horizontal reciprocating movement of the filter aid raw material, the material with a particle size smaller than the upper sieve hole will pass through the upper porous sieve plate 4 and fall onto the lower porous sieve plate 4; while the coarse material with a particle size larger than the upper sieve hole will slide along the inclined direction of the upper porous sieve plate 4 toward the opening 31, and finally slide off the end of the porous sieve plate 4 extending from the opening 31 to the collection device outside the box, thus completing the separation of coarse material.

[0061] The medium and fine materials falling onto the lower perforated screen plate 4 continue to disperse as the screening box 3 moves horizontally back and forth. Fine materials with a particle size smaller than the lower screen holes pass through the lower perforated screen plate 4 and fall into the collection drawer 8 at the bottom of the screening box 3. Meanwhile, medium materials with a particle size between the upper and lower screen holes slide along the inclined direction of the lower perforated screen plate 4 toward the opening 31 and finally slide off the end of the perforated screen plate 4 extending from the opening 31 to the collection device outside the box, thus completing the separation of medium materials.

[0062] After the screening operation is completed, turn off the power mechanism 7 and drive assembly 5, and pull out the collection drawer 8 from the collection tank 11 to carry out subsequent processing of the collected fine materials.

[0063] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the drive assembly 5 includes: a first turntable 51, a movable seat 52, a first swing arm 53, a fixed plate 54, a threaded screw 55, and a first servo motor 56. The perforated screen plate 4 is rotatably mounted inside the screening box 3 by means of a pin, which passes through the side wall of the screening box 3. The first turntable 51 is fixed to the extended end of the pin. The movable seat 52 moves along the outer side of the screening box 3. The two first swing arms 53 are symmetrically distributed, and one end of the first swing arm 53 is pivotally connected to the eccentric position of the first turntable 51 by means of a pin, and the other end is pivotally connected to the movable seat 52 by means of a pin. The two fixed plates 54 are fixed at intervals to the outside of the screening box 3. The threaded screw 55 is rotatably mounted between two fixed plates 54. The movable seat 52 is threadedly engaged with the threaded screw 55. The first servo motor 56 is fixed to the outer wall of the fixed plate 54 and is used to drive the threaded screw 55 to rotate. With the above scheme, when the first servo motor 56 is started, its output shaft drives the threaded screw 55 to rotate smoothly between the two fixed plates 54. Since the movable seat 52 and the threaded screw 55 are connected by a threaded engagement, the rotational motion of the threaded screw 55 is converted into the horizontal linear reciprocating motion of the movable seat 52 along the outer wall of the screening box 3 (the direction of motion switches with the forward and reverse rotation of the first servo motor 56).

[0064] At this time, the two first swing arms 53, which are pivotally connected to both ends of the movable seat 52, move synchronously: when the movable seat 52 moves forward, the upper first swing arm 53 is pushed forward, and through its pivotal connection with the eccentric position of the first turntable 51, it drives the pin of the upper porous sieve plate 4 and the first turntable 51 to rotate clockwise; at the same time, the lower first swing arm 53 is also pushed forward, and through the eccentric pivotal connection structure, it drives the pin of the lower porous sieve plate 4 and the first turntable 51 to rotate counterclockwise.

[0065] Preferably, by Figure 1 and Figure 2As shown in this embodiment, the drive assembly 5 further includes two first guide rods 57. The two first guide rods 57 are symmetrically fixed between the two fixed plates 54 and pass through the movable seat 52. With the above solution, when in use, the two first guide rods 57 can restrict the movable seat 52 from deflecting in a direction other than the axial direction of the threaded screw 55 (such as shaking up and down, tilting left and right), ensuring that the movable seat 52 always moves smoothly back and forth along a horizontal straight trajectory.

[0066] Optionally, by Figures 1-3 As shown, this embodiment also includes a linkage component 6. Two sets of drive components 5 are symmetrically arranged on two opposite outer sides of the screening box 3. The linkage component 6 includes: a rotating rod 61, a synchronous pulley 62, and a synchronous belt 63. The rotating rod 61 is fixedly connected to the end of the threaded screw 55. A synchronous pulley 62 is fixed on each of the two rotating rods 61. The synchronous belt 63 is tensioned by the two synchronous belts 63. With the above scheme, when the first servo motor 56 of one set of drive components 5 is started (in actual applications, only one first servo motor 56 can be set, and the linkage component 63 can be used to start the first servo motor 56), the linkage component 63 can be used to start the first servo motor 56. (Component 6 drives the other side to move synchronously, reducing energy consumption). The output shaft of the first servo motor 56 drives the threaded screw 55 on the same side to rotate. The rotating rod 61 fixed to the end of the threaded screw 55 rotates together, thereby driving the synchronous pulley 62 fixed on the rotating rod 61 to rotate synchronously. Since the synchronous belt 63 is tensioned between the synchronous pulleys 62 of the rotating rods 61 on both sides, the rotational motion of the synchronous pulley 62 on the active side is transmitted to the synchronous pulley 62 on the other side through the synchronous belt 63, so that the rotating rod 61 on the other side and the threaded screw 55 fixed to it also rotate synchronously at the same speed and in the same direction.

[0067] The threaded screws 55 of the drive components 5 on both sides rotate at the same frequency, thereby driving the moving seats 52 on both sides to make a completely synchronous horizontal reciprocating motion along the outer wall of the screening box 3.

[0068] Optionally, by Figure 1 and Figure 4 As shown, in this embodiment, the power mechanism 7 includes: a guide assembly 71, a connecting rod 72, a cantilever plate 73, a second turntable 74, a second swing arm 75, and a second servo motor 76. The guide assembly 71 is mounted on the base 1 and is used to guide the horizontal movement of the movable support 2. The connecting rod 72 is fixed to the ends of the two movable support 2. The cantilever plate 73 is fixed to the end of the base 1. The second turntable 74 is rotatably mounted on the top surface of the cantilever plate 73. One end of the second swing arm 75 is pivotally connected to the connecting rod 72 by a pin, and the other end is pivotally connected to the eccentric position of the second turntable 74 by a pin. The second servo motor 76 is fixed to the bottom surface of the cantilever plate 73 and is used to drive the second turntable 74 to rotate. With the above scheme, when the second servo motor 76 is started, its output shaft passes through the cantilever plate 73 and is fixedly connected to the center of the second turntable 74, driving the second turntable 74 to rotate uniformly around its own axis on the top surface of the cantilever plate 73.

[0069] Since one end of the second swing arm 75 is pivotally connected to the eccentric position of the second turntable 74 via a pin, when the second turntable 74 rotates, the eccentric connection point will move along a circular trajectory, thereby causing the other end of the second swing arm 75 to swing periodically back and forth. When the eccentric point rotates with the second turntable 74 to the side closer to the connecting rod 72, the second swing arm 75 is pushed forward, pushing the connecting rod 72 to move forward; when the eccentric point rotates to the side away from the connecting rod 72, the second swing arm 75 is pulled backward, pulling the connecting rod 72 back towards the cantilever plate 73.

[0070] Since the connecting rod 72 is fixedly connected to the ends of the two movable support seats 2, its reciprocating motion directly drives the two movable support seats 2 to move synchronously in the horizontal direction, and the screening box 3 moves horizontally reciprocating synchronously with the movable support seats 2.

[0071] Optionally, by Figure 1 and Figure 4 As shown, in this embodiment, the guide assembly 71 includes: a limiting plate 711, a second guide rod 712, and a telescopic spring 713. The two limiting plates 711 are fixed at intervals to the outer wall of the base 1. The movable support seat 2 is located between the two limiting plates 711. The second guide rod 712 is fixed between the two limiting plates 711 and passes through the movable support seat 2. Telescopic springs 713 are distributed between the two ends of the movable support seat 2 and the corresponding limiting plates 711. With the above scheme, in use, firstly, the second guide rod 712 passes through the movable support seat 2 and is fixed at both ends to the limiting plates 711, forming a rigid guide. The movable support seat 2 can only move horizontally in a straight line along the axial direction of the second guide rod 712, which restricts the movable support seat 2 from bouncing up and down in the vertical direction or from shifting left and right in the horizontal direction, ensuring that the screening box 3 always maintains a horizontal posture and moves back and forth.

[0072] Secondly, when the movable support 2 moves closer to the limiting plate 711 on one side, the telescopic spring 713 on that side is compressed by the movable support 2 and the limiting plate 711 together, while the telescopic spring 713 on the other side is naturally stretched as the support moves. The compressed telescopic spring 713 will generate a reverse elastic force, which will buffer the impact kinetic energy generated by the inertia of the movable support 2 and improve safety.

[0073] Preferably, by Figure 1 and Figure 5As shown, this embodiment also includes a limiting mechanism 9. After the collection drawer 8 is pushed into the collection trough 11, it is locked by the limiting mechanism 9. The limiting mechanism 9 includes: an L-shaped limiting block 91, a mounting rod 92, a return spring 94, and a pull ring 95. A handle 81 is fixed to the end of the collection drawer 8. The mounting rod 92 is fixed to the outer wall of the base 1 and passes through the L-shaped limiting block 91. A limiting plate 93 is fixed to the protruding end of the mounting rod 92. The return spring 94 is sleeved on the mounting rod 92 and is located between the L-shaped limiting block 91 and the limiting plate 93. The pull ring 95 is fixed to the outer wall of the L-shaped limiting block 91. With the above solution, when using the collection drawer 8, before the screening operation starts, the operator holds the handle 81 at the end of the collection drawer 8 and pushes the collection drawer 8 into the base 1 along the inner wall of the collection trough 11.

[0074] When the collection drawer 8 is fully pushed into the collection slot 11, the L-shaped limit block 91 is pulled by the pull ring 95 until the horizontal part of the L-shaped limit block 91 passes over the side wall of the base 1. At this time, the return spring 94 is squeezed and contracted by the L-shaped limit block 91 and the limit plate 93. Then, the L-shaped limit block 91 is rotated at a certain angle so that the horizontal part of the L-shaped limit block 91 is rotated to a vertical state.

[0075] At this time, the pull ring 95 is released, and the return spring 94 releases its elastic force to reset the L-shaped limit block 91. The horizontal part of the L-shaped limit block 91 (which has now been rotated to a vertical position) forms a limit stop on the collection drawer 8, ensuring the stability of the collection drawer 8.

[0076] When the fine material needs to be cleaned after screening, the operator pulls the L-shaped limit block 91 through the pull ring 95 to release the limit stop of the L-shaped limit block 91 on the collection drawer 8, and then the collection drawer 8 can be pulled out through the handle 81.

[0077] It should be noted that the first servo motor 56 and the second servo motor 76 are both commercially available conventional devices with built-in power switches. Those skilled in the art can make conventional selections according to their needs. Their working principles are common knowledge known to those skilled in the art and have been fully disclosed in the prior art, so they will not be elaborated on further in this article.

[0078] The circuit connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0079] Components not described in detail in this article are existing technologies.

[0080] The working principle and usage process of this utility model: When using the screening equipment of this utility model, the filter aid raw material to be screened is first put into the feed port at the top of the screening box 3. After starting the power mechanism 7, it drives the two symmetrical movable support seats 2 to reciprocate linearly along the horizontal direction of the base 1.

[0081] Since the screening box 3 is fixed at the top of the movable support 2, the screening box 3 moves horizontally back and forth synchronously with the movable support 2, so that the filter aid material in the box generates a lateral dispersion force on the porous screen plate 4, avoiding local accumulation of materials on the porous screen plate 4.

[0082] At the same time, the drive assembly 5 is activated, which drives the upper and lower porous sieve plates 4 to flip synchronously in opposite directions: for example, the upper porous sieve plate 4 flips down towards the inside of the screening box 3, while the lower porous sieve plate 4 slowly flips up towards the outside of the screening box 3, and the tilt angle of the two porous sieve plates 4 is adjusted synchronously, which is suitable for the screening needs of different filter aids.

[0083] Because the sieve holes of the upper porous sieve plate 4 are larger than those of the lower porous sieve plate 4, under the action of the horizontal reciprocating movement of the filter aid raw material, the material with a particle size smaller than the upper sieve hole will pass through the upper porous sieve plate 4 and fall onto the lower porous sieve plate 4; while the coarse material with a particle size larger than the upper sieve hole will slide along the inclined direction of the upper porous sieve plate 4 toward the opening 31, and finally slide off the end of the porous sieve plate 4 extending from the opening 31 to the collection device outside the box, thus completing the separation of coarse material;

[0084] The medium and fine materials that fall onto the lower perforated screen plate 4 continue to disperse as the screening box 3 moves horizontally back and forth. Fine materials with a particle size smaller than the lower screen holes pass through the lower perforated screen plate 4 and fall into the collection drawer 8 at the bottom of the screening box 3. Meanwhile, medium materials with a particle size between the upper and lower screen holes slide along the inclined direction of the lower perforated screen plate 4 toward the opening 31 and finally slide off the end of the perforated screen plate 4 extending from the opening 31 to the collection device outside the box, thus completing the separation of medium materials.

[0085] After the screening operation is completed, turn off the power mechanism 7 and drive assembly 5, and pull the collection drawer 8 out of the collection tank 11 to carry out subsequent processing of the collected fine materials.

[0086] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter aid sieving device, comprising a base (1), wherein the base (1) is provided with a collection trough (11), characterized in that, Also includes: Movable support base (2), two of the movable support bases (2) are symmetrically distributed and movably installed on both sides of the base (1); Screening box (3), the screening box (3) is fixed to the top of the movable support (2), and two sets of transverse through openings (31) are provided on the screening box (3). Two porous sieve plates (4) are distributed at intervals along the material screening direction. The ends of the porous sieve plates (4) extend out of the opening (31) and are rotatably installed in the screening box (3). The sieve holes of the upper porous sieve plate (4) are larger than those of the lower porous sieve plate (4). A drive assembly (5) is disposed on the outer wall of the screening box (3) for driving the two porous screen plates (4) to rotate synchronously in opposite directions; The power mechanism (7) is used to drive the movable support (2) to reciprocate in the horizontal direction; as well as A collection drawer (8) is provided in the collection trough (11) in a pull-out manner.

2. The filter aid sieving device according to claim 1, characterized in that: The driving component (5) includes: The first turntable (51) and the porous screen plate (4) are rotatably mounted in the screening box (3) by means of a pin. The pin passes through the side wall of the screening box (3), and the first turntable (51) is fixed to the protruding end of the pin. A movable seat (52) moves along the outer side of the screening box (3); The first swing arm (53) has two symmetrically distributed first swing arms (53), and one end of the first swing arm (53) is pivotally connected to the eccentric position of the first turntable (51) by means of a pin, and the other end is pivotally connected to the moving seat (52) by means of a pin. Fixing plates (54), two of the fixing plates (54) are fixed at intervals to the outer wall of the screening box (3); A threaded screw (55) rotatably disposed between two fixed plates (54), and a movable seat (52) threadedly engaged with the threaded screw (55); and The first servo motor (56) is fixed to the outer wall of the fixed plate (54) and is used to drive the threaded screw (55) to rotate.

3. The filter aid sieving device according to claim 2, characterized in that: The driving component (5) also includes: Two first guide rods (57) are symmetrically fixed between the two fixed plates (54) and pass through the movable seat (52).

4. The filter aid screening device according to claim 2, characterized in that: It also includes a linkage component (6), wherein two sets of drive components (5) are symmetrically arranged on two opposite outer sides of the screening box (3), and the linkage component (6) includes: Rotating rod (61), the rotating rod (61) is fixedly connected to the end of the threaded screw (55); Synchronous pulleys (62), each fixed to one of the two rotating rods (61); and Synchronous belt (63), which is tensioned by two synchronous belts (63).

5. The filter aid sieving device according to claim 1, characterized in that: The power mechanism (7) includes: A guide component (71) is disposed on the base (1) and is used to guide the horizontal movement of the movable support (2); A connecting rod (72) is fixed to the ends of the two movable support seats (2); The cantilever plate (73) is fixed to the end of the base (1); The second turntable (74) is rotatably mounted on the top surface of the overhang plate (73); The second swing arm (75) has one end pivotally connected to the connecting rod (72) by a pin, and the other end pivotally connected to the eccentric position of the second turntable (74) by a pin; and The second servo motor (76) is fixed to the bottom surface of the cantilever plate (73) and is used to drive the second turntable (74) to rotate.

6. The filter aid sieving device according to claim 5, characterized in that: The guide component (71) includes: Limiting plates (711), two of the limiting plates (711) are fixed at intervals to the outer wall of the base (1), and the movable support (2) is located between the two limiting plates (711); The second guide rod (712) is fixed between the two limiting plates (711) and passes through the movable support base (2); and Telescopic springs (713) are distributed between both ends of the movable support (2) and the corresponding limiting plate (711), and are sleeved on the second guide rod (712).

7. The filter aid screening device according to claim 1, characterized in that: It also includes a limiting mechanism (9), which locks the collection drawer (8) after it is pushed into the collection slot (11). The limiting mechanism (9) includes: L-shaped limit block (91); Mounting rod (92), which is fixed to the outer wall of the base (1) and passes through the L-shaped limiting block (91), and a limiting plate (93) is fixed at the protruding end of the mounting rod (92). A reset spring (94) is sleeved on the mounting rod (92) and located between the L-shaped limiting block (91) and the limiting plate (93).

8. The filter aid screening device according to claim 7, characterized in that: The limiting mechanism (9) further includes: Pull ring (95), the pull ring (95) is fixed to the outer wall of the L-shaped limiting block (91).

9. The filter aid screening device according to claim 1, characterized in that: The end of the collection drawer (8) is fixed with a handle (81).

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