A filtering device for separating solids and fluids

Abstract

The present invention relates to the technical field of solid-liquid separation, and in particular provides a filtering device for separating solids and fluids, comprising a first filter cylinder and two piston plates. A plurality of filter tubes and a liquid outlet pipe are arranged in the first filter cylinder; the two piston plates are arranged in the first filter cylinder so as to be movable along the axial direction of the first filter cylinder; the two piston plates are arranged opposite to each other in the first filter cylinder, and a plurality of limiting holes are provided on each piston plate; a plurality of filter tubes are passed through the plurality of limiting holes in a one-to-one correspondence; the two piston plates are configured to periodically move away from and closer to each other during the axial movement along the first filter cylinder. According to the solution of the present invention, the two piston plates are arranged to periodically move away from and closer to each other during the axial movement, thereby backflushing the filter tube between the two piston plates. At the same time, the filter tubes outside the two piston plates perform filtering normally, and cleaning and filtering are carried out simultaneously, thereby improving the cleaning effect and filtering efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-liquid separation, in particular to a filtering device for separating solids and fluids. Background Art

[0002] Electrophoretic paint is widely used in the automotive, home appliance, hardware, and other industries for coating metal surfaces. It offers uniform coatings, strong adhesion, and excellent corrosion resistance. It is also environmentally friendly and efficient, enabling automated coating processes to improve production efficiency and reduce costs.

[0003] During the coating process, electrophoretic paint can easily be mixed with impurities, affecting the film quality. Therefore, electrophoretic paint needs to be filtered to remove impurities such as particles and oil to maintain uniformity and stability, ensuring the quality of the finished film. Furthermore, recovered and filtered electrophoretic paint can be reused, reducing production costs.

[0004] During the filtration process, impurities such as resin and pigment particles in the electrophoretic paint may form a gel layer or a contamination layer on the surface of the filter tube, resulting in a decrease in the filtration efficiency of the filter tube, and thus the filter tube needs to be cleaned. Chinese patent document CN219091297U discloses an adjustable forward and backwash filter and water purifier, which switches the internal water channel by rotating the rotating head, so that the filter can switch between three states: filtering state, forward flushing state and backwashing state, and uses forward or backwashing water flow to clean the filter assembly. However, for areas where there are more local impurities accumulated, the cleaning effect achieved by the existing technology relying solely on the forward and backwashing of the water flow is poor, thereby affecting the filtration effect and filtration efficiency. In addition, when the existing technology cleans the filter tube, it is necessary to suspend the filtration process, which further affects the overall filtration efficiency. Summary of the Invention

[0005] The purpose of the present invention is to improve the cleaning effect of the filter tube, thereby ensuring the filtering effect and further improving the filtering efficiency.

[0006] In particular, the present invention provides a filtering device for separating solids and fluids, comprising: a first filter cartridge, in which a plurality of filter tubes and a liquid outlet pipe are arranged; a plurality of micropores are provided on the filter tube, and a plurality of liquid holes are provided in the area opposite to the liquid outlet pipe and the filter tube; a liquid inlet is provided at one end of the first filter cartridge for feeding the liquid to be filtered, and a liquid outlet is provided at the other end for discharging the unfiltered liquid; one end of the filter tube is connected with the liquid inlet, and the other end is connected with the liquid outlet; the liquid outlet pipe extends from one end of the first filter cartridge for discharging the filtered liquid; two piston plates are movably arranged in the first filter cartridge along the axial direction of the first filter cartridge; the two piston plates are arranged opposite to each other in the first filter cartridge, and each piston plate is provided with a plurality of limiting holes; a plurality of filter tubes are passed through the plurality of limiting holes in a one-to-one correspondence; the two piston plates are configured to periodically move away from and approach each other during the axial movement along the first filter cartridge.

[0007] Furthermore, a sleeve is provided between each limiting hole and the corresponding filter tube. The sleeve moves synchronously with the piston plate, and a scraper is provided in the sleeve. The scraper abuts against the outer tube wall of the filter tube.

[0008] Furthermore, the scraper is arranged in a spiral shape; and the scraper is made of rubber material.

[0009] Furthermore, the spiral directions of the scrapers on the two sleeves facing each other on the two piston plates are the same.

[0010] Furthermore, a one-way valve is provided on the piston plate for passing the liquid outside the two piston plates to between the two piston plates.

[0011] Furthermore, a water retaining cylinder is sleeved on the liquid outlet pipe, and limiting rings are provided at both ends of the water retaining cylinder; two piston plates are sleeved on the water retaining cylinder and are located between the two limiting rings.

[0012] Furthermore, the filtering device for separating solids and fluids also includes: at least one rotating drum, which is rotatably arranged on the side of the piston plate, and two sliding grooves surrounding the rotating drum are arranged on the side wall of the rotating drum, and the two sliding grooves are elliptical and symmetrically arranged with each other; at least one drive shaft is connected to at least one rotating drum, and is used to drive at least one rotating drum to rotate; at least one ring is provided on the side wall of each piston plate, and a sliding protrusion adapted to the shape of the sliding groove is provided on the inner wall surface of the ring; two opposite rings are arranged on the same rotating drum, and the two sliding protrusions are slidably connected to the two sliding grooves respectively.

[0013] Furthermore, the filtering device for separating solids and fluids also includes: at least one motor, arranged on the outside of the first filter cylinder, connected to at least one drive shaft, and used to drive the rotation of at least one drive shaft; the rotating cylinder is sleeved on the drive shaft and threadedly connected to the drive shaft; a limiting cylinder is provided on the side of the first filter cylinder, and a spiral groove is provided in the limiting cylinder; annular bosses are respectively provided at both ends of the rotating cylinder, and spiral strips adapted to the spiral grooves are provided on the side walls of the annular bosses; the spiral strips of the rotating cylinder and the internal threads of the rotating cylinder have the same rotation direction, and the pitch of the spiral strips is greater than the pitch of the internal threads.

[0014] Furthermore, the motor is configured to operate in a forward and reverse cycle.

[0015] Furthermore, the filtering device for separating solids and fluids further includes: a second filter cartridge connected to the liquid discharge port, filtering the liquid discharged from the liquid discharge port; wherein the liquid filtered by the second filter cartridge is passed to the liquid inlet.

[0016] The beneficial effects of the present invention are:

[0017] The filtering device for separating solids and fluids of the present invention is configured by arranging two opposing piston plates within a first filter barrel, and causing the two piston plates to periodically move away from and toward each other during axial movement, so that the hydraulic pressure between the two piston plates increases and decreases periodically, thereby periodically backflushing the filter tube between the two piston plates. During the cleaning of the filter tube between the two piston plates, the filter tube outside the two piston plates can still filter normally. The simultaneous cleaning and filtering not only improves the cleaning effect and ensures the filtering effect, but also improves the overall filtering efficiency. In addition, when the two piston plates move toward and away from each other, the redundant volume of the filter tube is forced to bend and deform between the two piston plates, making it easier for impurities attached to the inner wall of the filter tube to fall off, thereby improving the cleaning effect.

[0018] Furthermore, the filtering device for separating solids and fluids of the present invention arranges a sleeve between the limiting hole of the piston plate and the filter tube, and arranges a scraper on the inner side of the sleeve, so that when the piston plate moves axially relative to the filter tube, the scraper is used to scrape the outer tube wall of the filter tube, thereby reducing the risk of particles depositing on the outer tube wall of the filter tube and improving the cleaning effect of the filter tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. In the accompanying drawings:

[0020] Figure 1 is a schematic structural diagram of a filtering device for separating solids and fluids according to one embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram from another angle of a filtering device for separating solids and fluids according to one embodiment of the present invention;

[0022] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the cutting line AA in FIG.

[0023] Figure 4 yes Figure 3 Schematic enlarged view of middle region B;

[0024] Figure 5 is a schematic structural diagram from another angle of a filtering device for separating solids and fluids according to an embodiment of the present invention;

[0025] Figure 6 It is along Figure 5 A schematic cross-sectional view taken along the cutting line CC in FIG.

[0026] Figure 7 is a schematic structural diagram from another angle of a filtering device for separating solids and fluids according to an embodiment of the present invention;

[0027] Figure 8 It is along Figure 7 A schematic cross-sectional view taken along the cutting line DD in FIG.

[0028] Figure 9 yes Figure 8 Schematic enlargement of middle region E;

[0029] Figure 10 is a schematic structural diagram of a sleeve according to one embodiment of the present invention;

[0030] Figure 11 is a structural schematic diagram of a sleeve according to another angle of an embodiment of the present invention;

[0031] Figure 12 It is along Figure 11 Schematic cross-sectional view taken along the cutting line FF in FIG.

[0032] in:

[0033] 100. First filter cartridge; 110. Liquid inlet; 120. Liquid discharge port; 130. Limiting plate; 140. Liquid inlet chamber; 150. Filter chamber; 160. Liquid discharge chamber; 170. Limiting cylinder; 171. Spiral groove; 200. Filter tube; 300. Liquid outlet pipe; 310. Liquid through hole; 400. Piston plate; 410. Limiting hole; 420. One-way valve; 430. Ring; 431. Sliding protrusion; 440. Sleeve; 441. Scraper; 450. Water retaining cylinder; 451. Limiting ring; 500. Rotating cylinder; 510. Slide groove; 520. Annular boss; 530. Spiral strip; 540. Internal thread; 600. Drive shaft; 700. Motor; 800. Second filter cartridge. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] The terms "first" and "second" in this document are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0036] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," "coupled," and the like should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0037] Refer to the following Figures 1 to 12 A filtering device for separating solids and fluids provided by the present invention is described.

[0038] This embodiment provides a filtering device for separating solids and fluids. The filtering device for separating solids and fluids generally includes a first filter cartridge 100 and two piston plates 400.

[0039] Arranged within the first filter cartridge 100 are a plurality of filter tubes 200 and a liquid outlet pipe 300. The filter tubes 200 are provided with a plurality of micropores, and the area opposite the liquid outlet pipe 300 and the filter tubes 200 is provided with a plurality of liquid passage holes 310. A liquid inlet 110 for feeding the liquid to be filtered is provided at one end of the first filter cartridge 100, and a liquid outlet 120 for discharging unfiltered liquid is provided at the other end. One end of the filter tube 200 is connected to the liquid inlet 110, and the other end is connected to the liquid outlet 120. The liquid outlet pipe 300 extends from one end of the first filter cartridge 100 and is used to discharge the filtered liquid. Two piston plates 400 are disposed within the first filter cartridge 100 so as to be movably disposed along the axial direction of the first filter cartridge 100. The two piston plates 400 are disposed opposite each other within the first filter cartridge 100, and each piston plate 400 is provided with a plurality of limiting holes 410. The plurality of filter tubes 200 are disposed in a one-to-one correspondence through the plurality of limiting holes 410. The two piston plates 400 are configured to periodically move away from and toward each other during movement along the axial direction of the first filter cartridge 100 .

[0040] like Figure 6 As shown, two stop plates 130 are fixedly installed within the first filter cartridge 100, and the two ends of the filter tube 200 are respectively mounted on the two stop plates 130. The two stop plates 130 divide the first filter cartridge 100 into three chambers: a liquid inlet chamber 140 connected to the liquid inlet 110, a liquid discharge chamber 160 connected to the liquid discharge port 120, and a filtration chamber 150 located between the liquid inlet chamber 140 and the liquid discharge chamber 160. The filter tube 200 is generally configured as an ultrafiltration tube, with a dense distribution of micropores (not shown in the figure).

[0041] After the liquid to be filtered enters the first filter cartridge 100 through the liquid inlet 110, it flows from the liquid inlet cavity 140 into the filter tube 200. A portion of the liquid in the filter tube 200 passes through the micropores of the filter tube 200 for filtration, then enters the filter cavity 150, then enters the liquid outlet pipe 300 through the liquid through-hole 310, and finally flows out of the first filter cartridge 100 through the liquid outlet pipe 300. The remaining portion flows along the filter tube 200 to the liquid discharge cavity 160 of the first filter cartridge 100, and is then discharged from the liquid discharge port 120.

[0042] As the liquid in the filter tube 200 flows along the filter tube 200 toward the drain chamber 160, it forward-flushes impurities in the filter tube 200 and carries them toward the drain port 120. When the two piston plates 400 approach each other, the hydraulic pressure between the two piston plates 400 increases, causing the filtered liquid in the filter chamber 150 to enter the filter tube 200 through the micropores under the action of pressure, thereby reverse-flushing the filter tube 200.

[0043] The solution of this embodiment combines forward flushing and back flushing by setting two piston plates 400 that can be close to each other. While back flushing the filter tube 200 between the two piston plates 400, forward flushing is performed on the filter tube 200 in the remaining area, thereby improving the cleaning effect of the filter tube 200 and ensuring the filtering effect of the filter tube 200.

[0044] The two piston plates 400 are arranged to periodically move closer and further apart, causing the filter tube 200 between the two piston plates 400 to be periodically backflushed, thereby ensuring both filtration efficiency and cleaning effectiveness. Furthermore, while the filter tube 200 between the two piston plates 400 is backflushing, the filter tubes 200 in the remaining areas can continue to filter normally. The simultaneous cleaning and filtering not only improves the cleaning effect and efficiency, but also enhances the filtration effect and efficiency.

[0045] Furthermore, when the filter tube 200 is mounted on the two stop plates 130, a certain amount of redundancy is reserved between the two stop plates 130 for bending and deformation. As the two piston plates 400 move closer or further away from each other, friction forces the redundancy in the filter tube 200 to bend and deform between the two piston plates 400, making it easier for impurities adhering to the inner wall of the filter tube 200 to fall off, thereby improving the cleaning effect.

[0046] Furthermore, as the two piston plates 400 move closer to and further from each other, they also move axially along the first filter cartridge 100, allowing each area of ​​the filter tube 200 to be backflushed and cleaned, thereby ensuring overall cleaning effectiveness. Furthermore, each backflushing operation targets only a localized area of ​​the filter tube 200. This gradual cleaning of small areas enhances the backflushing effect, ensuring better cleaning of each section of the filter tube 200 and improving overall cleaning effectiveness.

[0047] In some embodiments, the liquid inlet 110 may be connected to a hydraulic pump. In other embodiments, the liquid outlet pipe 300 may be connected to a liquid pump.

[0048] A sleeve 440 is provided between each limiting hole 410 and the corresponding filter tube 200 . The sleeve 440 moves synchronously with the piston plate 400 . A scraper 441 is provided inside the sleeve 440 . The scraper 441 abuts against the outer tube wall of the filter tube 200 .

[0049] The solution of this embodiment is to set a sleeve 440 between the limiting hole 410 and the filter tube 200, which moves synchronously with the piston plate 400, and set a scraper 441 on the inner side of the sleeve 440, so that when the piston plate 400 moves axially relative to the filter tube 200, the scraper 441 is used to scrape the outer tube wall of the filter tube 200, thereby reducing the risk of particles crystallized in the liquid being deposited on the outer tube wall of the filter tube 200 and improving the cleaning effect of the filter tube 200.

[0050] The scraper blade 441 is arranged in a spiral shape; and the scraper blade 441 is made of rubber material.

[0051] In the solution of this embodiment, the scraper 441 is set to a spiral shape. On the one hand, the effective contact area between the scraper 441 and the filter tube 200 is increased, and the scraping effect of the scraper 441 on the filter tube 200 is improved; on the other hand, when the hydraulic pressure between the two piston plates 400 changes, when the liquid flows through the piston plates 400 under the action of the pressure difference, the spiral scraper 441 can guide the flow of the liquid, and prevent the scraper 441 from being separated from the contact with the filter tube 200 under the squeezing of the high-pressure liquid, thereby ensuring the cleaning effect of the scraper 441 on the filter tube 200.

[0052] Furthermore, in the solution of this embodiment, the scraper 441 is made of rubber material, which not only has good elasticity, flexibility, wear resistance and corrosion resistance, but also is not likely to cause damage to the filter tube 200 during the scraping process, thereby ensuring the service life of the filter tube 200.

[0053] like Figure 9 As shown, the spiral directions of the scrapers 441 on the two sleeves 440 facing each other on the two piston plates 400 are the same.

[0054] In the solution of this embodiment, the spiral directions of the two scrapers 441 opposite to each other are set to be the same, so that when the liquid flows through the piston plate 400 (that is, when the liquid flows from between the two piston plates 400 to the outside, or when the liquid flows from the outside to between the two piston plates 400), under the guidance of the spiral scraper 441, the rotation directions of the liquid at the two sleeves 440 are opposite, so that the friction force in the circumferential direction of the liquid on the filter tube 200 at the position where the two sleeves 440 are located is reversed, thereby causing the filter tube 200 to further twist and deform, making it easier for impurities attached to the inner wall of the filter tube 200 to fall off, thereby improving the cleaning effect.

[0055] Furthermore, because the spiral directions of the two opposing scrapers 441 are set to be the same, when the filter tube 200 is subjected to the friction of the water flow, the area between the two piston plates 400 is where the distortion and deformation occur, rather than the area outside the two piston plates 400. The length of the filter tube 200 between the two piston plates 400 is shorter than the length of the filter tube 200 outside the two piston plates 400. Therefore, under the same frictional force, the amount of distortion and deformation of the filter tube 200 between the two piston plates 400 is smaller. This improves the cleaning effect while preventing excessive distortion and damage to the filter tube 200, thereby ensuring the service life of the filter tube 200.

[0056] A one-way valve 420 is provided on the piston plate 400 for passing the liquid outside the two piston plates 400 to between the two piston plates 400 .

[0057] The solution of this embodiment is to provide a one-way valve 420 on the piston plate 400 so that when the two piston plates 400 move away from each other (i.e., when the hydraulic pressure between the two piston plates 400 decreases), the liquid flows from outside the two piston plates 400 to between the two piston plates 400 through the one-way valve 420, rather than flowing out of the filter tube 200, thereby reducing the risk of impurities passing through the micropores on the filter tube 200 and entering the filter cavity 150.

[0058] In some embodiments, at least one one-way valve 420 may be provided on each piston plate 400 .

[0059] The liquid outlet pipe 300 is sleeved with a water retaining cylinder 450 , and both ends of the water retaining cylinder 450 are provided with limit rings 451 . The two piston plates 400 are sleeved on the water retaining cylinder 450 and are located between the two limit rings 451 .

[0060] The solution of this embodiment is to install a water retaining cylinder 450 on the liquid outlet pipe 300, and use the water retaining cylinder 450 to block the liquid through hole 310 on the liquid outlet pipe 300, so that the liquid between the piston plates 400 and the liquid in the liquid outlet pipe 300 do not interfere with each other, thereby ensuring the liquid discharge efficiency of the liquid outlet pipe 300 and the backflushing effect on the filter tube 200. The limiting rings 451 at both ends of the water retaining cylinder 450 are used to limit the water retaining cylinder 450 and prevent it from separating from the piston plate 400. The distance between the limiting rings 451 at both ends of the water retaining cylinder 450 is greater than the maximum distance between the two piston plates 400 to ensure the normal operation of the piston plates 400.

[0061] The filtering device for solid and fluid separation may generally further include at least one rotating drum 500 and at least one driving shaft 600 .

[0062] At least one rotating drum 500 is rotatably mounted on the side of the piston plate 400. Two chute grooves 510 are disposed on the sidewall of the rotating drum 500, surrounding the rotating drum 500. The two chute grooves 510 are oval and symmetrically arranged. At least one drive shaft 600 is connected to the at least one rotating drum 500 and is used to drive the at least one rotating drum 500 in rotation. Each piston plate 400 has at least one collar 430 mounted on its sidewall. The inner surface of the collar 430 is provided with a sliding protrusion 431 that matches the shape of the chute groove 510. Two opposing collars 430 are mounted on the same rotating drum 500, and the two sliding protrusions 431 are slidably connected to the two chute grooves 510, respectively.

[0063] This embodiment employs two elliptical, encircling chute grooves 510 on the sidewalls of the rotating drum 500, and a sliding protrusion 431 shaped to match the chute grooves 510 is provided on the inner wall of the collar 430. As the rotating drum 500 rotates, the sliding protrusion 431 moves along the chute grooves 510, thereby driving the piston plate 400 in axial motion. Because the two chute grooves 510 are symmetrically arranged, the two piston plates 400 move in opposite directions. In other words, as the rotating drum 500 rotates, the two piston plates 400 move closer and further away from each other, thereby varying the hydraulic pressure between the two piston plates 400.

[0064] like Figure 7 As shown, in some preferred embodiments, a filtration device for separating solids and fluids may include two rotating drums 500 and two drive shafts 600. The two rotating drums 500 are symmetrically arranged on either side of a piston plate 400, and the two drive shafts 600 are respectively connected to the two rotating drums 500. Each piston plate 400 is provided with two collars 430, one facing the other. The two rotating drums 500 rotate synchronously, jointly driving the two piston plates 400 to move, making the movement of the piston plates 400 more stable and smooth.

[0065] In some embodiments, the filtering device for solid and fluid separation may generally further include at least one motor 700 .

[0066] At least one motor 700 is disposed outside the first filter cartridge 100 and is connected to at least one drive shaft 600 for driving the rotation of the at least one drive shaft 600. The rotating drum 500 is sleeved on the drive shaft 600 and is threadedly connected to the drive shaft 600. A limiting cylinder 170 is provided on the side of the first filter cartridge 100, and a spiral groove 171 is provided in the limiting cylinder 170. An annular boss 520 is provided at each end of the rotating drum 500, and a spiral strip 530 adapted to the spiral groove 171 is provided on the side wall of the annular boss 520. The spiral strip 530 of the rotating drum 500 and the internal thread 540 of the rotating drum 500 have the same rotation direction, and the pitch of the spiral strip 530 is greater than the pitch of the internal thread 540.

[0067] like Figure 7 As shown, the side of the first filter drum 100 is provided with a limiting drum 170 for accommodating the rotating drum 500 and the driving shaft 600. Figure 9 As shown, an annular boss 520 extending radially outward is respectively provided at both ends of the rotating drum 500 .

[0068] In the solution of this embodiment, the rotating drum 500 and the driving shaft 600 are arranged to be threadedly connected, the rotating drum 500 and the limiting cylinder 170 are arranged to be spirally connected, and the spiral strip 530 of the rotating drum 500 and the internal thread 540 of the rotating drum 500 are arranged to have the same rotation direction, and the pitch of the spiral strip 530 is greater than the pitch of the internal thread 540, so that when the driving shaft 600 rotates, the rotating drum 500 moves in the axial direction while rotating under the drive of the driving shaft 600 and the cooperation of the limiting cylinder 170.

[0069] In other embodiments, the drum 500 may be fixedly connected to the drive shaft 600, which rotates under the drive of the motor 700, thereby driving the drum 500 to rotate. The drive shaft 600 passes through the end wall of the first filter cartridge 100 and is threadedly connected to the end wall of the first filter cartridge 100, so that when the drive shaft 600 rotates, it moves axially along the first filter cartridge 100, thereby driving the drum 500 to move synchronously.

[0070] The motor 700 is configured to operate in a forward and reverse cycle.

[0071] In the solution of this embodiment, the motor 700 is configured to operate in a forward and reverse cycle, so that the drum 500 moves back and forth in the axial direction, thereby improving the overall cleaning effect of the filter tube 200, thereby ensuring the filtering effect and filtering efficiency of the filtering device for separating solids and fluids.

[0072] The filtering device for solid and fluid separation may generally further include a second filter cartridge 800 .

[0073] The second filter cartridge 800 is in communication with the liquid discharge port 120 and filters the liquid discharged from the liquid discharge port 120 . The liquid filtered by the second filter cartridge 800 is passed to the liquid inlet 110 .

[0074] The solution of this embodiment is to set up a second filter cartridge 800 to filter the liquid discharged from the liquid outlet 120, remove impurities in the liquid, and then transport the liquid to the liquid inlet 110, thereby improving the recycling rate of the liquid and reducing production costs.

[0075] The second filter cartridge 800 is preferably configured as a normal filtration structure, that is, compared with the ultrafiltration structure of the filter tube 200, the second filter cartridge 800 can only remove larger-sized impurities.

[0076] The specific working process of the filtering device for separating solids and fluids provided by the present invention is described in conjunction with the above embodiments:

[0077] The liquid to be filtered flows into the liquid inlet cavity 140 of the first filter cartridge 100 through the liquid inlet 110, and then flows into the filter tube 200. A portion of the liquid in the filter tube 200 passes through the micropores of the filter tube 200 for filtration, then enters the filter cavity 150, then enters the liquid outlet pipe 300 through the liquid through-hole 310, and finally flows out of the first filter cartridge 100 through the liquid outlet pipe 300. The other portion flows along the filter tube 200 to the liquid discharge cavity 160 of the first filter cartridge 100, and then is discharged from the liquid discharge port 120. It then enters the second filter cartridge 800, and after being filtered by the second filter cartridge 800, flows to the liquid inlet 110, and finally enters the first filter cartridge 100 for cyclic filtration.

[0078] During the liquid filtration process, the motor 700 is activated, driving the drive shaft 600 to rotate, causing the drum 500 to move axially and simultaneously rotate. As the drum 500 rotates, the sliding protrusions 431 move within the chute 510, thereby driving the two piston plates 400 to move axially. The axial movement of the piston plates 400 drives the sleeve 440 relative to the filter tube 200, causing the scraper 441 to scrape the outer wall of the filter tube 200. As the sleeve 440 moves axially, the spiral scraper 441 guides some of the liquid through the piston plates 400.

[0079] When the two piston plates 400 approach each other in the axial direction, the filtered liquid between the two piston plates 400 flows back through the micropores into the filter tube 200, backflushing the filter tube 200. At the same time, the redundant space of the filter tube 200 bends and deforms between the two piston plates 400.

[0080] When the two piston plates 400 move away from each other in the axial direction, the liquid outside the two piston plates 400 flows through the one-way valve 420 to the space between the two piston plates 400. The liquid in the filter tube 200 between the two piston plates 400 partially flows toward the drain port 120, while another portion flows through the micropores into the filter cavity 150, then enters the liquid outlet pipe 300 through the liquid hole 310, and finally exits the first filter cartridge 100.

[0081] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A filtering device for separating solids and fluids, characterized in that: include: A first filter cartridge, comprising a plurality of filter tubes and a liquid outlet pipe arranged therein; the filter tubes being provided with a plurality of micropores, and a plurality of liquid holes being provided in the area opposite the liquid outlet pipe and the filter tubes; a liquid inlet being provided at one end of the first filter cartridge for feeding the liquid to be filtered, and a liquid outlet being provided at the other end for discharging the unfiltered liquid; one end of the filter tube being in communication with the liquid inlet, and the other end being in communication with the liquid outlet; the liquid outlet pipe extending from one end of the first filter cartridge for discharging the filtered liquid; Two piston plates are arranged in the first filter cylinder so as to be movable along the axial direction of the first filter cylinder; the two piston plates are arranged opposite to each other in the first filter cylinder, and each piston plate is provided with a plurality of limiting holes; the plurality of filter tubes are passed through the plurality of limiting holes in a one-to-one correspondence; The two piston plates are configured to periodically move away from and closer to each other during movement along the axial direction of the first filter cartridge; A sleeve is provided between each of the limiting holes and the corresponding filter tube. The sleeve moves synchronously with the piston plate, and a scraper is provided in the sleeve. The scraper abuts against the outer wall of the filter tube. The scraper is provided in a spiral shape and is made of rubber material. The spiral directions of the scrapers on the two sleeves facing each other on the two piston plates are the same. Two limit plates are fixedly provided in the first filter cartridge, and the two ends of the filter tube are respectively provided on the two limit plates; when the filter tube is installed on the two limit plates, a certain amount of redundancy for bending and deformation is reserved between the two limit plates.

2. The filtering device for separating solids and fluids according to claim 1, characterized in that: A one-way valve is provided on the piston plate for passing the liquid outside the two piston plates to between the two piston plates.

3. The filtering device for separating solids and fluids according to claim 1, characterized in that The liquid outlet pipe is sleeved with a water retaining cylinder, and both ends of the water retaining cylinder are provided with limiting rings; the two piston plates are sleeved on the water retaining cylinder and are located between the two limiting rings.

4. The filtering device for separating solids and fluids according to claim 1, characterized in that Also includes: At least one rotating drum is rotatably arranged on the side of the piston plate, and two sliding grooves surrounding the rotating drum are arranged on the side wall of the rotating drum, and the two sliding grooves are elliptical and symmetrically arranged with each other; at least one driving shaft connected to at least one of the rotating drums, for driving at least one of the rotating drums to rotate; At least one collar is provided on the side wall of each piston plate, and a sliding protrusion adapted to the shape of the slide groove is provided on the inner wall surface of the collar; two opposite collars are provided on the same rotating drum, and the two sliding protrusions are respectively slidably connected to the two slide grooves.

5. The filtering device for separating solids and fluids according to claim 4, characterized in that: Also includes: at least one motor, disposed outside the first filter cartridge and connected to at least one of the drive shafts, for driving the rotation of at least one of the drive shafts; The rotating drum is sleeved on the driving shaft and is threadedly connected to the driving shaft; A limiting cylinder is provided on the side of the first filter cylinder, and a spiral groove is provided in the limiting cylinder; An annular boss is provided at each end of the rotating drum, and a spiral strip adapted to the spiral groove is provided on the side wall of the annular boss; The spiral strips of the rotating drum and the internal threads of the rotating drum have the same rotation direction, and the pitch of the spiral strips is greater than the pitch of the internal threads.

6. The filtering device for separation of solids and fluids according to claim 5, characterized in that The motor is configured to operate in a forward and reverse cycle.

7. The filtering device for separating solids and fluids according to claim 1, characterized in that Also includes: The second filter cartridge is communicated with the liquid discharge port and filters the liquid discharged from the liquid discharge port; wherein the liquid filtered by the second filter cartridge is passed to the liquid inlet.

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