An impurity filtration device

Abstract

This invention relates to the field of filtration equipment technology, specifically disclosing an impurity filtration device, including a sleeve, a filter cylinder disposed within the sleeve, and a drive source for driving the filter cylinder to rotate. A water inlet pipe for introducing water into the filter cylinder is located at the rear end of the sleeve. A liquid pool is formed at the bottom of the sleeve, and an overflow hole is provided on one side of the sleeve for allowing the liquid in the liquid pool to flow out. A spiral blade is fixedly connected to the inner wall of the filter cylinder. The bottom of the filter cylinder is immersed in the liquid pool, and the height of the liquid level does not exceed the height of the lowest point of the spiral blade's inner diameter. A slag discharge hopper is installed at the front end of the sleeve. When the filter cylinder rotates, by utilizing the liquid pool, overflow hole, spiral blade, and slag removal assembly, impurities are separated by centrifugal force during the rotation of the filter cylinder, and the filter holes are promptly flushed by a backwash device. This effectively solves the clogging problem caused by light impurities adhering to the filter cylinder, and has the advantages of improved filtration efficiency and reduced maintenance frequency.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and specifically to an impurity filtration device. Background Technology

[0002] Water treatment methods include physical and chemical treatment. Humans have been using water treatment for a considerable period. Physical methods involve using filter media with different pore sizes to remove impurities from the water through adsorption or barrier methods. Activated carbon is a significant adsorption method, while barrier methods pass water through the filter media, preventing larger impurities from passing through and thus obtaining cleaner water. Physical methods also include sedimentation, which allows lighter impurities to float to the surface and heavier impurities to settle at the bottom. Chemical methods use various chemicals to transform impurities in the water into substances less harmful to humans or to concentrate the impurities. The oldest chemical treatment method is probably adding alum to water; after the impurities aggregate and increase in size, they can be removed by filtration.

[0003] Chinese patent document CN112426787B discloses a microfilter for solid-liquid separation, including a base, a waterproof plate fixedly installed at the top of the middle part of the base, a water tank opened at the bottom of the waterproof plate, support rollers movably installed at the top of both ends of the base, a filter cartridge fixedly installed at the top of the support rollers, rotating rings adapted to the support rollers fixedly installed at both ends of the filter cartridge, a feed pipe extending into the middle of the back of the filter cartridge, a large gear ring fixedly installed on the back of the filter cartridge, a motor fixedly installed at the top of the back of the base, a small gear meshing with the large gear ring fixedly connected to the output end of the motor, a feeding box fixedly installed on the front of the feed pipe, a support shaft fixedly connected to the front of the feeding box, a feeding wheel installed inside the feeding box and driven to rotate by a transmission gear, and a rotating shaft is provided to rotate together with the feeding wheel.

[0004] In existing rotary drum filters, when filtering light impurities, wastewater enters the filter drum and is discharged through it, while impurities remain inside. As the filter drum rotates, the impurities are transported to the other end by gravity and the spiral blades. However, because the impurities are relatively light after separating from the liquid, they tend to adhere to the filter drum, preventing them from being transported to the other end. This leads to accumulation inside the filter drum and easy clogging of the filter pores, resulting in low filtration efficiency and the need for frequent maintenance. Summary of the Invention

[0005] This invention provides an impurity filtration device, which aims to solve the problem in related technologies that impurities, being lightweight, easily adhere to the filter cartridge.

[0006] An impurity filtration device includes a sleeve, a filter cylinder disposed within the sleeve, and a drive source for rotating the filter cylinder. A water inlet pipe is located at the rear end of the sleeve for introducing water into the filter cylinder. A liquid pool is formed at the bottom of the sleeve, and an overflow hole is located on one side of the sleeve for allowing the liquid in the liquid pool to flow out. A spiral blade is fixedly connected to the inner wall of the filter cylinder. The bottom of the filter cylinder is immersed in the liquid pool, and the liquid level does not exceed the height of the lowest point of the spiral blade's inner diameter. A slag discharge hopper is installed at the front end of the sleeve. A slag collection area is formed between the front end of the spiral blade and the front end of the filter cylinder. A slag removal component is located at the front end of the filter cylinder. When the filter cylinder rotates, the slag removal component scoops up impurities from the slag collection area and then places them into the slag discharge hopper. A backflushing device is installed inside the sleeve. The backflushing device includes multiple water outlets evenly distributed along the length of the sleeve. When the filter cylinder rotates, water is discharged from the water outlets, causing the water flow to spray onto the part of the filter cylinder that has just detached from the liquid pool.

[0007] Its effects are as follows: the inlet pipe is responsible for transporting sewage to the rear end of the filter cylinder. Subsequently, the motor starts to drive the filter cylinder to rotate. During this process, water flows into the liquid pool through the pores on the filter cylinder wall and is finally discharged from the overflow hole. At the same time, impurities in the sewage are effectively blocked inside the filter cylinder. As the filter cylinder continues to rotate, the spiral blades transport these impurities forward until they are transported to the slag collection area. The slag removal component is responsible for picking up the impurities in the liquid pool and throwing them into the slag discharge hopper. The slag discharge hopper is responsible for discharging the impurities into the external environment. During the rotation of the filter cylinder, the backflushing device is activated, which washes off the impurities adhering to the filter cylinder. In order to ensure that impurities cannot cross the spiral blades, the backflushing device is set to break the balance of impurity adhesion, effectively preventing impurities from accumulating on the inner wall of the filter cylinder. The slag removal component is set to achieve the active detachment of impurities. The synergistic effect of these key features not only improves the filtration efficiency, but also effectively solves the problems of light impurities being difficult to transport and the filter holes being easy to clog.

[0008] Preferably, the slag removal assembly includes multiple mounting rods arranged in a circumferential array and fixedly installed on the inner wall of the filter cylinder. Filter plates are hinged to the mounting rods, with the hinge axis parallel to the filter cylinder axis and located in the middle of the filter plate. Both ends of the filter plate are provided with arc-shaped baffles that are rotationally symmetrical about the hinge axis. A positioning component is installed between the filter plate and the filter cylinder to position the filter plate in the radial position of the filter cylinder. A toggle component is installed above the slag discharge hopper to rotate the passing filter plate 180° relative to the mounting rods, realizing the functions of automatic slag removal and discharge, improving the impurity filtration efficiency. The design of the filter plate allows it to maintain a suitable posture in different positions, effectively picking up impurities and pouring them into the slag discharge hopper. The arc-shaped baffles increase the impurity capacity of the filter plate and reduce impurity loss. The positioning component ensures that the filter plate maintains the correct position during filtration, improving the accuracy of slag removal.

[0009] Preferably, the positioning component includes a magnet fixedly mounted on the arc-shaped baffle, and a magnetically conductive area is provided on the inner wall of the filter cylinder near the mounting rod. The magnetic force between the magnet and the magnetically conductive area allows the filter plate to be stably maintained in the radial position of the filter cylinder. The magnetic force provides appropriate resistance to prevent the filter plate from flipping over on its own, thereby ensuring that impurities can be effectively removed. At the same time, the magnetic force also prevents the filter plate from shaking or shifting during operation, improving the stability and reliability of slag removal. In addition, since the magnetic force is non-contact, it can reduce mechanical wear and extend the service life of the equipment.

[0010] Preferably, the actuating assembly includes a lever fixedly installed at the front end of the sleeve, with a spring rod elastically hinged to the lever. The lever is located above the slag discharge hopper. When the filter plate contacts the lever, the filter plate rotates, and the spring rod rotates counterclockwise to accumulate elastic potential energy. When the spring rod passes the middle of the filter plate, it releases its elastic potential energy, pushing the filter plate to continue rotating. When the filter cylinder rotates, the filter plate moves accordingly. When the filter plate contacts the lever, the filter plate begins to rotate around its hinge axis. At the same time, the spring rod is subjected to the force of the filter plate, rotates counterclockwise, and accumulates elastic potential energy. When the spring rod rotates to a position past the middle of the filter plate, it releases its accumulated elastic potential energy, pushing the filter plate to continue rotating.

[0011] Preferably, the front and rear ends of the arc-shaped baffle are connected to triangular plates to prevent impurities from sliding out from the front and rear ends of the filter plate when scraping impurities.

[0012] Preferably, when the filter plate is in the lower position, the liquid level is above the rotation axis of the filter plate and the mounting rod, and below the arc-shaped baffle. When the filter cylinder rotates, when the filter plate rotates to the lower position, the height of the liquid level is above the rotation axis of the filter plate and the mounting rod, while ensuring that the liquid level is always below the arc-shaped baffle. This allows for the scraping of impurities floating on the liquid surface, while preventing impurities from overflowing the arc-shaped baffle, ensuring a smooth filtration process and filtration effect.

[0013] Preferably, the inner bottom of the sleeve is provided with a mud scraping assembly.

[0014] Preferably, the sludge scraping assembly includes a scraper that moves along the length of the sleeve. A motion component for controlling the movement of the scraper is installed inside the sleeve. A drain valve is installed at the bottom of the front end of the sleeve. When the filter plate is in its lowest position, i.e., at the bottom, the liquid level is precisely controlled above the rotation axis of the filter plate and the mounting rod, while ensuring that the liquid level is in the area below the arc-shaped baffle. The filter plate is connected to the mounting rod via a hinge shaft, the axis of which is parallel to the axis of the filter cylinder. During the rotation of the filter cylinder, once the filter plate rotates to the bottom position, the liquid level is maintained above the rotation axis of the filter plate and the mounting rod, while ensuring that the liquid level is always below the arc-shaped baffle. The liquid level can be controlled in a specific area between the rotation axis of the filter plate and the lower edge of the arc-shaped baffle. This precise control of the liquid level height allows the filter plate to efficiently capture suspended impurities in the water, while preventing impurities from overflowing the arc-shaped baffle, ensuring a smooth filtration process and filtration effect.

[0015] Preferably, the top and bottom of the slag discharge hopper are open, and the slag discharge hopper is wider at the top and narrower at the bottom, and the slag discharge hopper is fixedly installed on the sleeve.

[0016] Preferably, the backwashing device includes a water pump and a water distribution pipe. The inlet of the water pump is connected to the liquid pool via a water pipe, and the outlet is connected to the water distribution pipe. The water distribution pipe is installed along the length of the sleeve and fixedly installed inside the sleeve. Multiple water outlets are provided along the length of the water distribution pipe on the side closest to the filter cylinder. During operation, the water pump draws liquid from the liquid pool into the water distribution pipe. The liquid then forms a uniform water curtain and is sprayed onto the surface of the filter cylinder through the multiple water outlets on the water distribution pipe. When the filter cylinder begins to rotate, the portions that have just separated from the liquid pool will carry the liquid film and impurities due to centrifugal force. The water jets from the distribution pipe impact these areas, effectively stripping impurities adhering to the filter holes. Since the distribution pipe is arranged along the length of the sleeve and the outlet holes are evenly distributed, the water flow can cover the entire detachment area of ​​the filter cartridge, thus avoiding local clogging. The liquid in the liquid tank is circulated by the water pump, ensuring a continuous supply of backwash water and reducing the deposition of impurities in the liquid tank through the flushing action of the water flow. This series of processes works in conjunction with the rotation of the filter cartridge and the slag removal component to effectively prevent the filter holes from clogging and significantly improve filtration efficiency.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0018] 1. The inlet pipe delivers wastewater to the rear end of the filter cartridge. The motor then drives the filter cartridge to rotate. During this process, water flows into the liquid tank through the pores in the filter cartridge wall and is discharged through the overflow hole. Simultaneously, impurities in the wastewater are effectively trapped inside the filter cartridge. As the filter cartridge continues to rotate, the spiral blades push these impurities forward, guiding them into the sludge collection area. While the filter cartridge rotates, the mounting rod drives the filter plate to rotate along the sleeve axis. At this point, the positioning component comes into play, fixing the filter plate in a specific radial position, ensuring that the front end of the filter plate can smoothly receive the push from the spiral blades. As the filter cylinder continues to rotate, the filter plate moves to the top of the slag discharge hopper. When the lever contacts the lower half of the filter plate, it applies a pushing force, causing the filter plate to overcome the attraction between the magnet and the iron plate, thus achieving rotation. The filter plate abuts against the spring rod. When the spring rod passes the hinge of the filter plate, it releases the previously accumulated elastic potential energy, pushing the filter plate to continue rotating. After the filter plate has rotated 180 degrees, another magnet attracts the iron plate, fixing the filter plate in the radial position of the filter cylinder again. During the flipping process, due to gravity, the impurities fall into the slag discharge hopper, thus completing the entire slag discharge process.

[0019] 2. After the filter plate detaches from the actuating assembly, the arc-shaped baffle, using magnetic attraction, effectively resets it to its initial position, ensuring that impurity collection continues in subsequent cycles. When the filter plate is re-immersed in wastewater, the wastewater backwashes the filter surface, effectively preventing impurities from adhering to the plate. Simultaneously, when the filter plate enters the wastewater, its top is always above the liquid surface to prevent impurities from crossing over and adhering to it. During the rotation of the filter cylinder, the parts that have just detached from the liquid tank carry liquid film and impurities due to centrifugal force. At this time, the water jet from the distribution pipe impacts these parts, effectively stripping impurities adhering to the filter holes. Because the distribution pipe is arranged along the length of the sleeve and the outlet holes are evenly distributed, the water flow can cover the entire detachment area of ​​the filter cylinder, avoiding localized clogging. The liquid in the liquid tank is circulated by the pump, ensuring a continuous supply of backwash water and reducing impurity deposition through the flushing action of the water flow. Attached Figure Description

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 This is a side view of the present invention.

[0022] Figure 3 This is a side view of the present invention after the sleeve has been removed.

[0023] Figure 4This is a schematic diagram of the internal structure of the filter cartridge of the present invention.

[0024] Figure 5 for Figure 4 A magnified structural diagram of point A in the middle.

[0025] Figure 6 This is a schematic diagram of the liquid level.

[0026] Figure 7 This is a side view of the recoil device.

[0027] Figure 8 This is a side view of the toggle component.

[0028] Figure 9 This is a side view of the sludge scraper assembly.

[0029] Figure label:

[0030] 1. Sleeve; 11. Overflow hole; 12. Drain valve; 2. Drive source; 3. Inlet pipe; 4. Filter cylinder; 41. Spiral blade; 42. Edge banding; 5. Slag hopper; 6. Slag removal assembly; 61. Mounting rod; 62. Filter plate; 621. Arc baffle; 63. Positioning assembly; 631. Magnet; 632. Magnetic guide zone; 64. Actuating assembly; 641. Actuating rod; 642. Spring rod; 7. Backflushing device; 71. Water pump; 72. Water distribution pipe; 8. Sludge scraping assembly; 81. Scraper; 82. Lead screw; 83. Guide rod. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1-9As shown, an impurity filtration device includes: a sleeve 1, a drive source 2, a water inlet pipe 3, a filter cylinder 4, a slag discharge hopper 5, a slag removal assembly 6, and a backflushing device 7. The sleeve 1 is mounted on the ground via support legs, thereby forming a liquid pool at the bottom of the sleeve 1. An overflow hole 11 is provided on one side of the sleeve 1 for the liquid in the liquid pool to flow out. The filter cylinder 4 is rotatably mounted inside the sleeve 1. The drive source 2 is mounted on the sleeve 1 and is used to drive the filter cylinder 4 to rotate around its axis. The water inlet pipe 3 is located at the rear end of the sleeve 1 and extends into the filter cylinder 4, thereby supplying water to the filter cylinder 4. Wastewater is discharged into the filter cylinder 4. The slag hopper 5 is fixedly installed at the front end of the sleeve 1. The slag removal assembly 6 is installed at the front end of the filter cylinder 4. The water inlet pipe 3 transports the wastewater to the rear end of the filter cylinder 4. The drive source 2 drives the filter cylinder 4 to rotate. Water flows into the liquid pool through the filter holes of the filter cylinder 4 and is discharged from the overflow hole 11. Impurities are blocked inside the filter cylinder 4. The slag removal assembly 6 is used to remove the impurities in the liquid pool and then put the impurities into the slag hopper 5. The impurities are discharged to the outside through the slag hopper 5. When the filter cylinder 4 rotates, the backflushing device 7 washes off the impurities adhering to the filter cylinder 4.

[0033] The filter cylinder 4 adopts a porous metal mesh structure. Both the front and rear ends of the filter cylinder 4 are provided with edging 42 extending towards the center. Solid-liquid separation is achieved through surface sieve holes. A spiral blade 41 is fixedly installed on the inner wall of the filter cylinder 4. The front end of the spiral blade 41 and the front end of the filter cylinder 4 form a slag collection area for installing the slag removal assembly 6. A coaxial mounting ring is fixedly installed on the outer side of the filter cylinder 4. A set of rollers adapted to the mounting ring is installed inside the sleeve 1. The drive source 2 drives the rollers to rotate, thereby causing the filter cylinder 4 to rotate and be installed in the sleeve 1. Light impurities enter the filter cylinder 4 through the inlet pipe 3, float or suspend in the sewage, and then as the filter cylinder 4 rotates, the spiral blade 41 pushes the impurities forward, thus moving the impurities forward. Since the rotation of the filter cylinder 4 causes the impurities to adhere to the part of the filter cylinder 4 that just exits the liquid surface, the backwash device 7 sprays water onto the part of the filter cylinder 4 that just detaches from the liquid pool, washing away the impurities adhering to the inner wall of the filter cylinder 4. When the impurities are transported to the slag collection area, the slag removal component 6 picks up the impurities in the liquid pool and then puts the impurities into the slag discharge hopper 5.

[0034] The slag removal assembly 6 includes multiple mounting rods 61, multiple filter plates 62, a positioning assembly 63, and a toggle assembly 64. The mounting rods 61 are arranged in pairs, and all pairs of mounting rods 61 are fixedly installed in a circular array within the slag collection area of ​​the filter cylinder 4. The filter plates 62 have rotating shafts at the center of their front and rear sides, which are hinged to two mounting rods 61 in the same group, with the hinge axis parallel to the axis of the filter cylinder 4. Each end of the filter plate 62 has an arc-shaped baffle 621, which is rotationally symmetrical about the hinge axis. Triangular plates are connected to the front and rear ends of the arc-shaped baffle 621. When the arc-shaped baffle 621 is closest to the inner wall of the filter cylinder 4, a gap exists between the arc-shaped baffle 621 and the inner wall of the filter cylinder 4, thus preventing contact that would prevent the filter plate 62 from rotating. The positioning component 63 is used to position the filter plate 62 in the radial position of the filter cylinder 4, that is, the axis of the filter cylinder 4 is located in the plane where the filter plate 62 is located. When the slag removal component 6 rotates together with the filter cylinder 4, the top of the filter plate 62 exceeds the liquid surface, so that the impurities in the slag collection area move together with the filter plate 62, and thus the impurities move upward. During the upward movement, the arc-shaped baffle 621 blocks the impurities to prevent them from slipping. When the filter plate 62 passes above the slag discharge hopper 5, the actuating component 64 rotates the filter plate 62 180°, and at the same time, the arc-shaped baffle 621 no longer blocks the impurities. The impurities fall from the filter plate 62 into the slag discharge hopper 5. When the filter plate 62 re-enters the sewage, the sewage backwashes the filter surface of the filter plate 62, thereby preventing impurities from adhering to the filter plate 62.

[0035] Positioning component 63 includes two magnets 631, which are respectively mounted on two arc-shaped baffles 621 at both ends of filter plate 62. A magnetically conductive area 632 is provided on the inner wall of the filter cylinder 4 between the two mounting rods 61 in the same group. An iron sheet is placed within the magnetically conductive area 632. When the magnet 631 approaches the iron sheet, an attractive force is generated between the magnet 631 and the iron sheet, thereby positioning the filter plate 62 in a radial position within the filter cylinder 4. When the filter cylinder 4 rotates, the mounting rods 61 drive the filter plate 62 to move along the inner wall of the sleeve 1. At this time, positioning component 63 fixes the filter plate 62 in a radial position, so that the front end of the filter plate 62 bears… As the filter cylinder 4 continues to rotate, the filter plate 62 moves above the slag discharge hopper 5, and the impurities pushed by the spiral blade 41 are pushed by the filter plate 62. At this time, the actuating component 64 contacts the filter plate 62 and pushes it to rotate around the hinge axis. When the filter plate 62 rotates to a certain angle, the impurities fall into the slag discharge hopper 5 due to gravity, completing the slag discharge. During the flipping process, the arc-shaped baffle 621 returns to its initial position by magnetic attraction after the filter plate 62 is separated from the actuating component 64, ensuring that the impurity collection action of the next cycle is continuous. When the filter plate 62 enters the sewage, the top of the filter plate 62 is always above the liquid surface to prevent impurities from jumping over the filter plate 62 from the top.

[0036] The actuating assembly 64 includes a lever 641 and a spring lever 642. The lever 641 is fixedly installed at the front end of the sleeve 1 and extends into the filter cylinder 4. The spring lever 642 is elastically hinged to the lever 641 via a torsion spring. Let h1 be the maximum height that the axis of the filter plate 62 can reach, and h2 be the height of the top of the spring lever 642 in the initial state. Then h2 > h1, and the height of the lever 641 is less than h1. When the filter cylinder 4 rotates with the filter plate 62, the lever 641... 1. The filter plate 62 is abutted against the lower half of the filter plate 62, thereby causing the filter plate 62 to rotate against the attraction between the magnet 631 and the iron sheet. The filter plate 62 is also abutted against the spring rod 642, causing the spring rod 642 to rotate. When the spring rod 642 passes the hinge of the filter plate 62, the spring rod 642 releases elastic potential energy, pushing the filter plate 62 to continue rotating. After the filter plate 62 rotates 180°, another magnet 631 attracts the iron sheet again, causing the filter plate 62 to be in the radial position of the filter cylinder 4 again.

[0037] The top and bottom of the slag discharge hopper 5 are both open structures. The slag discharge hopper 5 is in the shape of an inverted trapezoidal shell, with the top opening width being wider than the bottom opening width. The slag discharge hopper 5 is fixedly connected to the front end of the sleeve 1 by welding. The edge of the top opening of the slag discharge hopper 5 is aligned with the edge of the front opening of the sleeve 1. The bottom opening extends to the waste collection area outside the sleeve 1. The side wall of the slag discharge hopper 5 shell gradually narrows from top to bottom to form a guide channel. The inverted trapezoidal shell structure guides impurities to slide along the side wall to the bottom opening, reducing the retention of impurities inside the slag discharge hopper 5. The layout of the top opening aligned with the front opening of the sleeve 1 ensures that the slag removal component 6 can directly put impurities into the slag discharge hopper 5. The narrowing design of the bottom opening improves the concentration of impurity discharge. The rigid connection structure between the slag discharge hopper 5 and the sleeve 1 avoids the deviation of the slag discharge path caused by vibration during equipment operation, improving the stability of the impurity discharge process.

[0038] like Figure 1 , Figure 6 and Figure 7As shown, the backwash device 7 includes a water pump 71 and a water distribution pipe 72. The water inlet of the water pump 71 is connected to the liquid tank through a water pipe, and the water outlet is connected to the water distribution pipe 72 extending along the length of the sleeve 1. The water distribution pipe 72 is fixedly installed inside the sleeve 1, and several water outlet holes are evenly opened along its length on the side near the filter cylinder 4. When the water pump 71 is started, the water in the liquid tank is pumped into the water distribution pipe 72, and the water flows through the water outlet holes to form a continuous jet flow. The water inlet of the water pump 71 is connected to the liquid tank through a water pipe, which can realize the liquid in the liquid tank... To achieve water recycling and reduce water waste, the water distribution pipe 72 is installed along the length of the sleeve 1 and fixed inside the sleeve 1, ensuring that the backwash water flow covers the entire length of the filter cylinder 4. Multiple water outlets are opened on the side of the water distribution pipe 72 closest to the filter cylinder 4, allowing the water flow to be evenly distributed along the axial direction of the filter cylinder 4. The spacing of the water outlets can be adjusted according to the rotational speed of the filter cylinder 4 and the degree of impurity adhesion. When the water pump 71 is running, it draws the liquid from the liquid pool to the water distribution pipe 72, and the liquid forms a uniform water curtain through the multiple water outlets, spraying onto the surface of the filter cylinder 4. When the filter cartridge 4 rotates, the part that has just detached from the liquid pool carries the liquid film and impurities due to centrifugal force. At this time, the water jet from the water distribution pipe 72 impacts this part, peeling off the impurities attached to the filter holes. Since the water distribution pipe 72 is arranged along the length of the sleeve 1 and the water outlet holes are evenly distributed, the water flow can cover the entire detachment area of ​​the filter cartridge 4, avoiding local blockage. The liquid in the liquid pool is recycled by the water pump 71, which not only ensures a continuous supply of backwash water, but also reduces the deposition of impurities in the liquid pool through water flushing. This process works in conjunction with the rotation of the filter cartridge 4 to effectively prevent filter hole blockage and improve filtration efficiency. During the backwashing process, the water flow continuously impacts the surface area of ​​the filter cartridge 4 that has detached from the liquid pool. Due to the weakening of the liquid surface tension, impurities are prone to remain in this area. The impact force of the water flow can break the adhesion between the impurities and the surface of the filter cartridge 4, causing the impurities to fall back into the liquid pool with the water flow, avoiding blockage of the filter cartridge 4 pores due to the accumulation of impurities. This design realizes the online cleaning function, effectively maintains the permeation efficiency of the filter cartridge 4, and extends the continuous operation cycle of the equipment.

[0039] Since tiny impurities will settle at the bottom of the sleeve 1, a trapezoidal sedimentation zone is provided at the bottom of the sleeve 1, and a sludge scraper 8 is provided in the sedimentation zone.

[0040] The sludge scraping assembly 8 includes a scraper 81 and a motion assembly. The scraper 81 can move horizontally along the length of the sleeve 1. The motion assembly drives the scraper 81 to move on the inner bottom surface of the sleeve 1. The drain valve 12 is located at the bottom front end of the sleeve 1, corresponding to the end of the scraper 81's movement path. The valve can be a manually or automatically controlled gate structure. When the scraper 81 moves along the length of the sleeve 1 under the drive of the motion assembly, its edge contacts the inner bottom surface of the sleeve 1, pushing the impurities deposited at the bottom toward the drain valve 12. When the scraper 81 moves to the position of the drain valve 12, the valve opens, and the sediment is discharged with the liquid. The scraper 81 can achieve continuous sludge removal through reciprocating or unidirectional movement in conjunction with the periodic opening and closing of the valve. For example, after the scraper 81 completes each unidirectional movement, the motion assembly controls it to return to the initial position. At the same time, the drain valve 12 opens when the scraper 81 reaches the end point and closes after sludge removal. Thus, the sediment is periodically removed, preventing the accumulation of impurities in the liquid pool from affecting the overflow efficiency.

[0041] The sludge scraping assembly 8 includes a lead screw 82 extending along the length of the sleeve 1. A scraper 81 with a threaded fit is sleeved on the outside of the lead screw 82. One end of the lead screw 82 is connected to the output shaft of a stepper motor via a coupling. The stepper motor is fixed to the outer wall of the rear end of the sleeve 1 by bolts. A guide rod 83 parallel to the lead screw 82 is provided inside the sleeve 1. The guide rod 83 passes through the scraper 81 and slides with the scraper 81. A downwardly inclined tapered drain pipe is welded to the bottom of the front end of the sleeve 1. A drain valve 12, preferably a pneumatic butterfly valve, is connected to the flange at the end of the drain pipe. The pneumatic butterfly valve is connected to an external control box via a wire. When the scraper 81 is driven by the stepper motor along the length of the sleeve 1... During movement, the gap between the bottom surface of scraper 81 and the inner bottom surface of sleeve 1 is controlled at 2-3 mm. The sludge deposited at the bottom of the liquid pool is pushed into the conical drain pipe by scraper 81. The pneumatic butterfly valve opens periodically under the command of the control box to discharge the sludge, which can effectively remove the sludge deposited in the liquid pool at the bottom of sleeve 1 and avoid the blockage at the bottom of filter cylinder 4 caused by long-term accumulation of sludge. At the same time, through the coordinated action of mechanical scraping and drain valve 12, the directional collection and centralized discharge of sediment are realized, reducing the frequency of manual cleaning. The continuous movement of scraper 81 under the control of motion components further ensures that the sediment is completely pushed to the drain port, preventing secondary deposition of residues from affecting the filtration efficiency.

[0042] Working principle: The inlet pipe 3 transports sewage to the rear end of the filter cylinder 4. The motor drives the filter cylinder 4 to rotate. Water flows into the liquid pool through the filter holes of the filter cylinder 4 and is discharged from the overflow hole 11. Impurities are blocked inside the filter cylinder 4. As the filter cylinder 4 rotates, the spiral blade 41 pushes the impurities forward, thus allowing them to enter the slag collection area. At the same time as the filter cylinder 4 rotates, the mounting rod 61 drives the filter plate 62 to move along the inner wall of the sleeve 1. At this time, the positioning component 63 fixes the filter plate 62 in a radial position, so that the front end of the filter plate 62 receives the push from the spiral blade 41. As the filter cylinder 4 continues to rotate, the filter plate 62 moves above the slag discharge hopper 5. The lever 641 abuts against the lower half of the filter plate 62, causing the filter plate 62 to rotate against the attraction between the magnet 631 and the iron sheet. The filter plate 62 also abuts against the spring rod 642, causing the spring rod 642 to rotate. When the spring rod 642 passes the hinge point of the filter plate 62, it releases its elastic potential energy, pushing the filter plate 62 to continue rotating. After the filter plate 62 rotates 180°, another magnet 631 attracts the iron sheet again, and the filter plate rotates 180°. The filter plate 62 is positioned radially in the filter cylinder 4. During the flipping process, impurities fall into the slag discharge hopper 5 due to gravity, completing the slag discharge. After the filter plate 62 disengages from the actuating assembly 64, the arc-shaped baffle 621 is magnetically returned to its initial position, ensuring continuous impurity collection in the next cycle. When the filter plate 62 re-enters the wastewater, the wastewater backwashes the filter surface of the filter plate 62, thus preventing impurities from adhering to the filter plate 62. Furthermore, when the filter plate 62 enters the wastewater, its top is always positioned above the liquid surface to prevent... Impurities pass over the filter plate 62 from the top. When the filter cylinder 4 rotates, the part that has just separated from the liquid pool carries the liquid film and impurities due to centrifugal force. At this time, the water jet from the water distribution pipe 72 impacts this part, peeling off the impurities attached to the filter holes. Since the water distribution pipe 72 is arranged along the length of the sleeve 1 and the water outlet holes are evenly distributed, the water flow can cover the entire separation area of ​​the filter cylinder 4, avoiding local blockage. The liquid in the liquid pool is recycled by the water pump 71, which not only ensures the continuous supply of backwash water, but also reduces the deposition of impurities in the liquid pool through water flushing.

[0043] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An impurity filtration device, comprising a sleeve, a filter cylinder disposed within the sleeve, and a drive source for driving the filter cylinder to rotate, wherein a water inlet pipe for introducing water into the filter cylinder is disposed at the rear end of the sleeve, characterized in that, The bottom of the sleeve forms a liquid pool, and an overflow hole is provided on one side of the sleeve for the liquid in the liquid pool to flow out. A spiral blade is fixedly connected to the inner wall of the filter cylinder. The bottom of the filter cylinder is immersed in the liquid pool, and the height of the liquid level does not exceed the height of the lowest point of the inner diameter of the spiral blade. A slag discharge hopper is installed at the front end of the sleeve. The area between the front end of the spiral blade and the front end of the filter cylinder is a slag collection area. A slag removal component is provided at the front end of the filter cylinder. When the filter cylinder rotates, the slag removal component picks up the impurities in the slag collection area and then puts them into the slag discharge hopper. A backflushing device is installed inside the sleeve. The backflushing device includes multiple water outlets. The water outlets are evenly arranged along the length of the sleeve. When the filter cylinder rotates, water is discharged from the water outlets, so that the water flow is sprayed on the part of the filter cylinder that has just separated from the liquid pool. The slag removal assembly includes multiple mounting rods fixedly installed on the inner wall of the filter cylinder in a circumferential array. Filter plates are hinged to the mounting rods, and the hinge axis is parallel to the filter cylinder axis. The hinge axis is located in the middle of the filter plate. Both ends of the filter plate are provided with arc-shaped baffles that are rotationally symmetrical about the hinge axis. A positioning component is installed between the filter plate and the filter cylinder to position the filter plate in the radial position of the filter cylinder. A turning component is installed above the slag discharge hopper to rotate the passing filter plate 180° relative to the mounting rod. The positioning component includes a magnet fixedly mounted on the arc-shaped baffle, and a magnetically conductive area is provided on the inner wall of the filter cartridge near the mounting rod; The actuating assembly includes a lever fixedly installed at the front end of the sleeve. A spring rod is elastically hinged to the lever via a torsion spring, and the lever is located above the slag discharge hopper. When the filter plate contacts the lever, the filter plate rotates, and at the same time, the spring rod rotates counterclockwise to accumulate elastic potential energy. When the spring rod passes the middle of the filter plate, it releases the elastic potential energy and pushes the filter plate to continue rotating. The lever extends into the filter cylinder and is located at the top of the filter cylinder.

2. The impurity filtration device according to claim 1, characterized in that, The front and rear ends of the arc-shaped baffle are connected to triangular plates.

3. The impurity filtration device according to claim 1, characterized in that, When the filter plate is at the bottom, the liquid level is above the rotation axis of the filter plate and the mounting rod, and below the arc-shaped baffle.

4. The impurity filtration device according to claim 1, characterized in that, The inner bottom of the sleeve is equipped with a mud scraping assembly.

5. The impurity filtration device according to claim 4, characterized in that, The sludge scraping assembly includes a scraper that moves along the length of the sleeve, a motion component for controlling the movement of the scraper is installed inside the sleeve, and a drain valve is installed at the bottom of the front end of the sleeve.

6. The impurity filtration device according to claim 1, characterized in that, The slag discharge hopper has openings at the top and bottom, and is wider at the top and narrower at the bottom. The slag discharge hopper is fixedly installed on the sleeve.

7. The impurity filtration device according to claim 1, characterized in that, The backwashing device includes a water pump and a water distribution pipe. The water pump's inlet end is connected to the liquid tank through a water pipe, and its outlet end is connected to the water distribution pipe. The water distribution pipe is set along the length of the sleeve and fixedly installed inside the sleeve. Multiple water outlet holes are opened along the length of the side of the water distribution pipe near the filter cylinder.

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