A filtering device for processing synthetic resin materials and a filtering method thereof

Abstract

The present invention discloses a filtering device and a filtering method for processing synthetic resin materials, which belongs to the technical field of resin material pretreatment. The device comprises an outer shell, a liquid storage kettle connected to the bottom of the outer shell, a cover provided on the top of the outer shell, and liquid inlet and outlet pipes respectively provided at corresponding positions on one side of the cover and the liquid storage kettle, and a support plate installed at the bottom of the inner cavity of the outer shell. In the present invention, through the designed guide pipe, the medium to be filtered can filter impurities by flowing in the guide pipe, and the filtered residual impurities can stay on the surface of the filtering mechanism. When the expansion of the filtering mechanism is controlled, the current filtering pressure can be adjusted. After the filtering mechanism is expanded, the residual material can be removed from the gap formed by the expansion of the filtering mechanism. By combining the control of the filtering pressure and the backwashing effect, the filtering adaptability to different liquid materials in the process of filtering resin raw materials is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of resin material pretreatment, and in particular relates to a filtering device and a filtering method for processing synthetic resin materials. Background Art

[0002] Synthetic resins are a class of high-molecular-weight polymers derived through chemical synthesis and are widely used in modern society. Synthetic resins are typically formed through the polymerization of small-molecule monomers and possess a variety of properties, including plasticity, adhesion, film-forming properties, insulation, and chemical resistance. They are widely used in a wide range of fields, including packaging, construction, electronics, automotive, aerospace, medical, and household goods. For example, polyethylene and polypropylene are used to manufacture plastic bags, containers, and pipes; polyvinyl chloride is used for insulation of wires and cables, pipes, and window frames; epoxy resins are used in adhesives, coatings, and electronic component encapsulation; and phenolic resins are used in the manufacture of electrical insulation, automotive parts, and building materials. During the processing of synthetic resins, impurities in the liquid raw materials must be filtered to maintain the quality of the synthesized product.

[0003] The Chinese invention patent with authorization announcement number CN116351151B discloses an equipment and process for stripping liquid dispersion, purification and compounding. The equipment includes a skid-mounted base, on which a dispersion structure, a physical separation mechanism, and a distillation component are installed. The physical separation mechanism performs filtration treatment on the waste liquid after the dispersion treatment; and when the pressure inside the physical separation mechanism increases to a preset value, the flow direction of the waste liquid inside it can be changed, and the blocked particles can be impacted so that the blocked particles are discharged together with the waste liquid, thereby achieving the purpose of backwashing and cleaning. The above scheme characterizes the blockage situation inside the physical separation mechanism by the pressure inside the physical separation mechanism, and automatically discharges the particles and part of the waste liquid when the internal pressure increases to a preset value. In the process of discharging the particles together with the waste liquid, the internal pressure of the physical separation mechanism decreases, but in actual use, the fixed filter membrane is prone to filtration accuracy inaccuracy when filtering resin raw materials with different viscosities, and the backwash efficiency is low, and there is room for improvement. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that a fixed filter membrane is prone to inaccurate filtration accuracy and low backwash efficiency when filtering resin raw materials with different viscosities, and to propose a filtration device and a filtration method for processing synthetic resin materials.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A filtering device for processing synthetic resin materials comprises an outer shell, the bottom of which is connected to a liquid storage kettle, a cover body provided on the top of the outer shell, and liquid inlet and outlet pipes provided at corresponding positions on one side of the cover body and the liquid storage kettle, respectively; a support plate is installed at the bottom of the inner cavity of the outer shell, and a plurality of guide pipes are arranged around the top of the support plate along an axis through a fixing frame, and a plurality of filtering mechanisms are sequentially provided in the guide pipes along the axis direction. The medium to be filtered introduced from the cover body enters from the top of the guide pipes through pipes and is filtered in sequence before entering the liquid storage kettle at the bottom;

[0007] A control mechanism is arranged at the top of the guide tube, and a driving mechanism is connected to the multiple control mechanisms. The control mechanism is connected to multiple pressure stops, which are radially penetrated on one side of the filtering mechanism. The movement of the pressure stop members controls the extension and contraction of the filtering mechanism in the axial direction of the guide tube.

[0008] As a further description of the above technical solution:

[0009] The control mechanism includes a control gear ring and a fixed seat, the fixed seat is connected to the top of the corresponding guide tube, the bottom of the control gear ring is connected to a swivel, the swivel is rotatably connected to the inner cavity of the fixed seat through a bearing, a plurality of first control blocks are equidistantly arranged around the outer periphery of the swivel along the axis, and a second control block is arranged at the position corresponding to the plurality of first control blocks on the inner side of the fixed seat, the bottom of the second control block is connected to a slide rod, the slide rod is slidably connected to the travel groove opened at the top of the fixed seat, and the bottom end of the slide rod extends through the travel groove into the guide tube and is connected to the top of the pressure stop member.

[0010] As a further description of the above technical solution:

[0011] The first control block includes a plate body connected to the rotating ring, and the end of the plate body has a triangular wedge portion. The cross-sectional shape of the second control block is triangular, and the inclined surfaces of the first control block and the second control block are opposite to each other. The rotation of the first control block drives the second control block to move inward.

[0012] As a further description of the above technical solution:

[0013] The travel groove is connected to a shaft sleeve, which is connected to the outside of the sliding rod. One side of the shaft sleeve is connected to a moving rod. The moving rod is slidably connected to a sliding hole opened on one side of the inner cavity of the travel groove. A first spring is sleeved on the outside of the moving rod, and both ends of the first spring are respectively connected to the end of the moving rod and the corresponding positions on the outside of the guide tube.

[0014] As a further description of the above technical solution:

[0015] The driving mechanism includes a driving part, which is connected to the outer shell through a mounting member. The driving part includes a motor and a corresponding transmission gear set, and one end of the output shaft of the gear set is connected to a rotating gear ring, and the outer peripheral side of the rotating gear ring is engaged with the control gear ring at the corresponding position.

[0016] As a further description of the above technical solution:

[0017] The pressure stop member includes a movable plate, the top of the movable plate is connected to the bottom end of the slide rod, and a plurality of pins are connected to the position of the inner side of the movable plate corresponding to the filtering mechanism. The pins are conical, and the conical front ends of the pins extend into the filtering mechanism.

[0018] As a further description of the above technical solution:

[0019] The filtration mechanism includes two oppositely arranged filter membranes, a folding mold core is connected between adjacent filter membranes, and the filter membranes are connected by elastic bags, and a sleeve is connected between the side edges of the filter membranes on both sides. The outer peripheral side of the sleeve is provided with multiple control grooves equidistantly around the axis, and the pin body is inserted into the control groove, and the extension thickness of the pin body in the control groove is used to push the filter membranes on both sides to adjust the expansion degree.

[0020] As a further description of the above technical solution:

[0021] A locking rod is inserted between multiple filter membranes, and the locking rod is connected to the top of the fixed frame. Liquid separation plates are provided on both sides of the guide tube. Multiple rotating sleeves are connected to the bottom of the filter membrane in sequence. The rotating sleeves are connected to the outside of the locking rod. Spiral guide plates are connected on both sides of the rotating sleeve. Multiple groups of spiral guide plates guide the filtered medium of the filter membrane to spirally flow downward.

[0022] As a further description of the above technical solution:

[0023] The inner cavity of the outer shell is equidistantly connected to a plurality of support parts along the axis, and two sides of the support parts are respectively in contact with adjacent pressure-stopping members.

[0024] As a further description of the above technical solution:

[0025] A filtration method for processing synthetic resin materials, specifically comprising the following steps:

[0026] Select a matching guide tube array combination based on the viscosity coefficient of the target resin and the impurity particle size distribution;

[0027] Install the filtration unit, compress the filtration unit part and place it into the guide tube array;

[0028] External materials are fed into multiple guide tubes through a pumping device, and the expansion degree of the filtration mechanism is adjusted by a control mechanism, and the filtration pressure is dynamically adjusted according to the expansion degree of the filtration mechanism;

[0029] The material filtered by the filtering mechanism enters the bottom liquid storage kettle and is then pumped out through an external suction device.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0031] 1. In the present invention, through the designed guide tube, the medium to be filtered can filter impurities by flowing in the guide tube, and the filtered residual impurities can stay on the surface of the filtering mechanism. When the expansion of the filtering mechanism is controlled, the current filtration pressure can be adjusted. After the filtration mechanism is expanded, the residual material can be removed from the gap of the expanded filtration mechanism. By combining the control of the filtration pressure and the backwash effect, the filtration adaptability to different liquid materials in the filtration process of resin material raw materials is improved.

[0032] 2. In the present invention, through the designed control mechanism, when the working output shaft of the driving part drives the rotating gear ring to rotate, the rotation of the rotating gear ring can drive the rotation of the circumferential control gear ring, and the rotation of the control gear ring can drive the inclined surface of the bottom first control block and the squeezed second control block. The second control block is pressurized to drive the sliding rod to move with the bottom pressure stop member, and the pressure stop member can be inserted into the filtering mechanism. When the pressure stop member pin body contacts the filtering mechanism, the thicker end of the rear side of the pin body can abut the filtering mechanism. By adjusting the expansion degree of the filtering mechanism, it is beneficial to control the filtration pressure through the expanded filtering mechanism during operation to maintain the filtration flux. At the same time, the filter pore gap can be increased by the expansion of the filtering mechanism, which is convenient for flushing and sending out the retained particles during backwashing, thereby improving the filtration adaptability.

[0033] 3. In the present invention, through the designed filtration mechanism, when multiple filter membranes extend into the guide tube, two adjacent filter membranes can be closed by the sleeve, and the expansion of the filter membrane can pull the inner folded filter element to expand. The expanded folded filter element can expand the filtration gap, thereby increasing the backwash flow rate, which is beneficial for flushing out the retained impurities through the flushing water. When the medium to be filtered passes through the adjacent filter membranes, it can contact the bottom spiral guide plate, and the spiral guide plate can guide the medium to flow downward in a spiral shape, thereby increasing the residence time of the medium to be filtered, and the filtration uniformity can be improved by the spirally cast medium raw material. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of a filter device made of synthetic resin material proposed by the present invention;

[0035] Figure 2 This is a schematic diagram of the disassembled structure of a filter device made of synthetic resin material proposed by the present invention;

[0036] Figure 3 This is a schematic diagram of the driving mechanism structure of a filter device made of synthetic resin material proposed by the present invention;

[0037] Figure 4 This is a schematic diagram of the assembly structure of a liquid separation plate of a filter device made of synthetic resin material proposed by the present invention;

[0038] Figure 5 This is a schematic diagram of the overall structure of a guide tube of a filtering device made of synthetic resin material proposed by the present invention;

[0039] Figure 6 This is a schematic diagram of the assembly structure of a control mechanism of a filter device for processing synthetic resin materials proposed by the present invention;

[0040] Figure 7 The present invention proposes Figure 6 A schematic diagram of the structure of the enlarged part A;

[0041] Figure 8 This is a schematic diagram of the disassembled structure of a pressure stopper of a filter device made of synthetic resin material proposed by the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of a liquid separation plate of a filtration device made of synthetic resin material proposed by the present invention when viewed from above;

[0043] Figure 10 This is a schematic diagram of the assembly structure of the filtration mechanism of a filter device made of synthetic resin material proposed by the present invention;

[0044] Figure 11 This is a schematic diagram of the disassembled structure of the filtration mechanism of a filtration device for processing synthetic resin materials proposed by the present invention;

[0045] Figure 12 This is a schematic structural diagram of a pressure-stopping member of a filter device made of synthetic resin material proposed in the present invention.

[0046] Legend:

[0047] 1. Outer shell; 2. Liquid storage kettle; 3. Cover; 4. Guide tube; 5. Control mechanism; 501. Control gear ring; 502. Rotating ring; 503. First control block; 504. Second control block; 505. Travel groove; 506. Sliding rod; 507. Fixed seat; 508. Moving rod; 509. First spring; 6. Filtration mechanism; 601. Filter membrane; 602. Elastic bag; 603. Collar; 604. Control groove; 605. Rotating sleeve; 606. Spiral guide plate; 7. Pressure stop; 701. Moving plate; 702. Pin body; 8. Support part; 9. Driving mechanism; 901. Driving part; 902. Rotating gear ring; 10. Liquid separation plate; 11. Support plate; 12. Fixed frame; 13. Locking rod. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] See also Figures 1-12 The present invention provides a technical solution: a filtering device for processing synthetic resin materials, comprising an outer shell 1, a liquid storage kettle 2 connected to the bottom of the outer shell 1, a cover 3 provided on the top of the outer shell 1, and liquid inlet and outlet pipes respectively provided at corresponding positions on one side of the cover 3 and the liquid storage kettle 2, a support plate 11 is installed at the bottom of the inner cavity of the outer shell 1, a plurality of guide pipes 4 are arranged along the axis around the top of the support plate 11 through a fixing frame 12, a plurality of filtering mechanisms 6 are sequentially provided in the guide pipe 4 along the axial direction, and the medium to be filtered introduced from the cover 3 enters from the top of the guide pipe 4 through a pipeline and is filtered in sequence before entering the liquid storage kettle 2 at the bottom;

[0050] A control mechanism 5 is arranged at the top of the guide tube 4, and a driving mechanism 9 is transmission-connected between the multiple control mechanisms 5. The control mechanism 5 is transmission-connected to multiple pressure stoppers 7. The pressure stoppers 7 are radially arranged on one side of the filtering mechanism 6. The movement of the pressure stoppers 7 controls the expansion and contraction of the filtering mechanism 6 in the axial direction of the guide tube 4.

[0051] Among them, the number and diameter of the guide tubes 4 can be pre-set according to the filtering parameters such as flux, filtering particle size, etc., and corresponding flushing pipes and pressurized pipes can also be set on one side of the outer shell 1. At the same time, in order to ensure that the liquid inlet pipe introduced from the top of the cover body 3 can evenly distribute the medium to be filtered into multiple guide tubes 4, liquid distribution pipes or liquid distribution mechanisms corresponding to the liquid outlet and multiple guide tubes 4 on the surrounding side can be selected.

[0052] Specifically: through the designed guide tube 4, the medium to be filtered can filter impurities by flowing in the guide tube 4, and the filtered residual impurities can stay on the surface of the filtering mechanism 6. When the expansion of the filtering mechanism 6 is controlled, the current filtering pressure can be adjusted, and after the filtering mechanism 6 is expanded, the residual material can be removed from the gap expanded by the filtering mechanism 6. By combining the control of the filtering pressure and the backwashing effect, the filtration adaptability of different liquid materials in the filtration process of resin material raw materials is improved.

[0053] See also Figure 6-Figure 8The control mechanism 5 includes a control gear ring 501 and a fixed seat 507. The fixed seat 507 is connected to the top of the corresponding guide tube 4. The bottom of the control gear ring 501 is connected to a swivel 502. The swivel 502 is rotatably connected to the inner cavity of the fixed seat 507 through a bearing. The control gear ring 501 and the swivel 502 both have empty grooves for the medium to be filtered to enter. A plurality of first control blocks 503 are equidistantly arranged around the outer periphery of the swivel 502 along the axis. Second control blocks 504 are provided at positions corresponding to the plurality of first control blocks 503 on the inner side of the fixed seat 507. A sliding rod 506 is connected to the bottom of the second control block 504. The sliding rod 506 is slidably connected to the travel groove 505 opened at the top of the fixed seat 507, and the bottom end of the sliding rod 506 extends through the travel groove 505 into the guide tube 4 and is connected to the top of the pressure stop member 7.

[0054] The first control block 503 includes a plate connected to the swivel 502, and the end of the plate has a triangular wedge portion. The second control block 504 has a triangular cross-section, and the first control block 503 and the second control block 504 have opposing inclined surfaces. The rotation of the first control block 503 drives the second control block 504 to move inward.

[0055] The drive mechanism 9 includes a drive unit 901, which is connected to the outer shell 1 through a mounting member. The drive unit 901 includes a motor and a corresponding transmission gear set, and one end of the gear set output shaft is connected to a rotating gear ring 902. The outer peripheral side of the rotating gear ring 902 is engaged with the control gear ring 501 at the corresponding position. The motor should be a servo motor to control the rotation accuracy.

[0056] The pressure stopper 7 includes a movable plate 701, the top of which is connected to the bottom of the slide rod 506. A plurality of pins 702 are connected to the inner side of the movable plate 701 at positions corresponding to the filter mechanism 6. The pins 702 are conical, and the conical front ends of the pins 702 extend into the filter mechanism 6.

[0057] The travel groove 505 is connected with a shaft sleeve, which is connected to the outside of the slide rod 506. A moving rod 508 is connected to one side of the shaft sleeve. The moving rod 508 is slidably connected to a sliding hole opened on one side of the inner cavity of the travel groove 505. A first spring 509 is sleeved on the outside of the moving rod 508. The two ends of the first spring 509 are respectively connected to the end of the moving rod 508 and the corresponding position on the outside of the guide tube 4. Through the designed shaft sleeve and moving rod 508, the external first spring 509 can be deployed when the moving rod 508 moves, so that the first control block 503 can be rotated in the opposite direction. The first spring 509 can use its own tension to drive the moving rod 508 and the slide rod 506 to reset, so that the pin body 702 is pulled out of the control groove 604.

[0058] Specifically: through the designed control mechanism 5, when the working output shaft of the driving part 901 drives the rotating gear ring 902 to rotate, the rotation of the rotating gear ring 902 can drive the circumferential control gear ring 501 to rotate, and the rotation of the control gear ring 501 can drive the inclined surface of the bottom first control block 503 and the squeezed second control block 504. The second control block 504 is pressurized to drive the slide rod 506 to move with the bottom pressure stop member 7, and the pressure stop member 7 can be inserted into the filtering mechanism 6. When the pin body 702 of the pressure stop member 7 contacts the filtering mechanism 6, the thicker end of the rear side of the pin body 702 can abut the filtering mechanism 6, thereby controlling the expansion degree of the filtering mechanism 6, which is beneficial to controlling the filtration pressure through the expanded filtering mechanism 6. At the same time, the filter pore gap can be increased through the expansion of the filtering mechanism 6, which is convenient for flushing out the retained particles during backwashing, thereby improving the filtration adaptability.

[0059] Furthermore, through the designed driving mechanism 9, the control gear ring 501 on the outer peripheral side can be driven to rotate synchronously by rotating the rotating gear ring 902, thereby accurately controlling the synchronous inward radial movement of the top pressure stop member 7 of the guide tube 4 at the corresponding position, which is conducive to simultaneously controlling the filtration accuracy between multiple groups of guide tubes 4 and improving the control and adjustment effect.

[0060] See also Figure 6-Figure 7 and Figure 10-11 The filtering mechanism 6 includes two oppositely arranged filter membranes 601. A folding mold core is connected between adjacent filter membranes 601, and the filter membranes 601 are connected by an elastic bag 602. A sleeve 603 is connected between the side edges of the filter membranes 601 on both sides. The outer periphery of the sleeve 603 is provided with a plurality of control grooves 604 equidistantly around the axis. The pin body 702 is inserted into the control groove 604. The extension thickness of the pin body 702 in the control groove 604 pushes the filter membranes 601 on both sides to adjust the expansion degree.

[0061] The filter membrane 601 and the elastic capsule 602 can be made of high temperature resistant materials to adapt to the filtration processing conditions after the resin material is synthesized;

[0062] A locking rod 13 is passed through multiple filter membranes 601, and the locking rod 13 is connected to the top of the fixed frame 12. A liquid separation plate 10 is provided on both sides of the guide tube 4. A plurality of rotating sleeves 605 are connected to the bottom of the filter membrane 601 in sequence. The rotating sleeve 605 is connected to the outside of the locking rod 13. Spiral guide plates 606 are connected to both sides of the rotating sleeve 605. Multiple groups of spiral guide plates 606 guide the filtered medium of the filter membrane 601 to spirally flow downward.

[0063] The inner cavity of the outer shell 1 is equidistantly connected with a plurality of support parts 8 along the axis, and both sides of the support parts 8 are in contact with adjacent pressure stop members 7 respectively. The arrangement of the support parts 8 can improve the movement stability of the pressure stop member 7 and reduce movement deviation and shaking.

[0064] Specifically, through the designed filtering mechanism 6, when multiple filter membranes 601 extend into the guide tube 4, two adjacent filter membranes 601 can be closed by the sleeve 603. When it is necessary to control the filtration pressure or backwash, the control mechanism 5 can be used to drive the multiple movable plates 701 on the surrounding side to move inward. When the movable plates 701 move, they can be inserted into the control groove 604 through the pin body 702. When the thicker end of the pin body 702 is inserted into the control groove 604, the filter membranes 601 on both sides can expand outward. The expansion of the filter membrane 601 can pull the inner pleated filter element to expand. The expanded pleated filter element can expand the filtration gap, thereby facilitating the flushing of trapped impurities through the flushing water during backwashing. When the medium to be filtered passes through the adjacent filter membranes 601, it can contact the bottom spiral guide piece 606. The spiral guide piece 606 can guide the medium to flow downward in a spiral shape, thereby increasing the residence time of the medium to be filtered, and the spirally cast medium raw material can improve the filtration uniformity.

[0065] The multi-layer filter membrane 601 can fully filter the medium to be filtered. After filtration, the medium can be distributed into the liquid storage kettle 2 through the liquid separation plate 10 at the bottom of the guide tube 4, and flow outward through the liquid outlet pipe connected to the pump body on one side of the liquid storage kettle 2.

[0066] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0067] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A filtering device for processing synthetic resin materials, comprising an outer shell (1), the bottom of the outer shell (1) being connected to a liquid storage kettle (2), a cover (3) being provided on the top of the outer shell (1), and liquid inlet and outlet pipes being provided at corresponding positions on one side of the cover (3) and the liquid storage kettle (2), a support plate (11) being installed at the bottom of the inner cavity of the outer shell (1), and characterized in that: A plurality of guide tubes (4) are arranged around the top of the support plate (11) along the axis through a fixing frame (12), and a plurality of filtering mechanisms (6) are sequentially arranged in the guide tubes (4) along the axis direction. The medium to be filtered introduced from the cover body (3) enters from the top of the guide tubes (4) through the pipeline and is filtered in sequence and then enters the liquid storage kettle (2) at the bottom. A control mechanism (5) is arranged on the top of the guide tube (4), and a driving mechanism (9) is connected to the plurality of control mechanisms (5). The control mechanism (5) is connected to a plurality of pressure stop members (7). The pressure stop members (7) are radially arranged on one side of the filtering mechanism (6). The movement of the pressure stop members (7) controls the expansion and contraction of the filtering mechanism (6) in the axial direction of the guide tube (4). The control mechanism (5) includes a control gear ring (501) and a fixed seat (507), the fixed seat (507) is connected to the top of the corresponding guide tube (4), the bottom of the control gear ring (501) is connected to a rotating ring (502), the rotating ring (502) is rotatably connected to the inner cavity of the fixed seat (507) through a bearing, a plurality of first control blocks (503) are equidistantly arranged around the outer peripheral side of the rotating ring (502) along the axis, and a second control block (504) is arranged at the position corresponding to the plurality of first control blocks (503) on the inner side of the fixed seat (507), the bottom of the second control block (504) is connected to a sliding rod (506), the sliding rod (506) is slidably connected to a travel groove (505) opened at the top of the fixed seat (507), and the bottom end of the sliding rod (506) passes through the travel groove (505) and extends into the guide tube (4) and is connected to the top of the pressure stop member (7); The first control block (503) comprises a plate body connected to the rotating ring (502), and the end of the plate body has a triangular wedge portion. The cross-sectional shape of the second control block (504) is triangular, and the first control block (503) and the second control block (504) have opposing inclined surfaces. The rotation of the first control block (503) drives the second control block (504) to move inward. The travel groove (505) is connected to a shaft sleeve, which is connected to the outside of the slide rod (506). One side of the shaft sleeve is connected to a moving rod (508). The moving rod (508) is slidably connected to a sliding hole opened on one side of the inner cavity of the travel groove (505). The outside of the moving rod (508) is provided with a first spring (509). The two ends of the first spring (509) are respectively connected to the end of the moving rod (508) and the corresponding position of the outside of the guide tube (4); The pressure stop member (7) includes a movable plate (701), the top of the movable plate (701) is connected to the bottom of the slide rod (506), and a plurality of pins (702) are connected to the inner side of the movable plate (701) at positions corresponding to the filtering mechanism (6), and the pins (702) are conical, and the conical front ends of the pins (702) extend into the filtering mechanism (6); The filtering mechanism (6) comprises two filter membranes (601) arranged opposite to each other, a folding core is connected between adjacent filter membranes (601), and the filter membranes (601) are connected by an elastic bag (602), a sleeve (603) is connected between the side edges of the filter membranes (601) on both sides, and a plurality of control grooves (604) are equidistantly provided on the outer peripheral side of the sleeve (603) along the axis, and the pin body (702) is inserted into the control groove (604), and the extension thickness of the pin body (702) in the control groove (604) pushes the filter membranes (601) on both sides to adjust the degree of expansion.

2. A filtering device for processing synthetic resin materials according to claim 1, characterized in that: The driving mechanism (9) comprises a driving part (901), the driving part (901) being connected to the outer shell (1) via a mounting member, one end of an output shaft of the driving part (901) being connected to a rotating gear ring (902), the outer peripheral side of the rotating gear ring (902) being meshed with a control gear ring (501) at a corresponding position.

3. A filter device for processing synthetic resin materials according to claim 1, characterized in that: A locking rod (13) is provided between the plurality of filter membranes (601), and the locking rod (13) is connected to the top of the fixing frame (12). A liquid separation plate (10) is provided on both sides of the guide tube (4). The bottom of the filter membrane (601) is connected in sequence with a plurality of rotating sleeves (605), the rotating sleeves (605) are connected to the outside of the locking rod (13), and spiral guide plates (606) are connected on both sides of the rotating sleeve (605). The plurality of spiral guide plates (606) guide the filtered medium of the filter membrane (601) to spirally flow downward.

4. A filter device for processing synthetic resin materials according to claim 1, characterized in that: The inner cavity of the outer shell (1) is connected to a plurality of support portions (8) equidistantly around the axis, and both sides of the support portions (8) are in contact with adjacent pressure stop members (7) respectively.

5. A filtration method for processing synthetic resin materials, applied to a filtration device for processing synthetic resin materials according to any one of claims 1 to 4, characterized in that: The specific steps include: According to the viscosity coefficient of the target resin and the impurity particle size distribution, a matching guide tube (4) array combination is selected; Install the filter unit, compress the filter unit part and place it into the guide tube (4) array; External materials are fed into the plurality of guide tubes (4) through a pumping device, and the control mechanism (5) controls the filtration mechanism (6) to adjust the expansion degree, and the filtration pressure is dynamically adjusted according to the expansion degree of the filtration mechanism (6); The material filtered by the filtering mechanism (6) enters the bottom liquid storage kettle (2) and is then pumped out by an external suction device.

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