Impurity filtering device

Abstract

The invention relates to the technical field of filtering equipment, and particularly discloses an impurity filtering device which comprises a sleeve, a filter cartridge arranged in the sleeve and a driving source used for driving the filter cartridge to rotate, a water inlet pipe used for feeding water into the filter cartridge is arranged at the rear end of the sleeve, and a liquid pool is formed in the bottom of the sleeve. One side of the sleeve is provided with an overflow hole used for enabling liquid in the liquid pool to flow out, the inner wall of the filter cartridge is fixedly connected with a spiral blade, the bottom of the filter cartridge is immersed in the liquid pool, the height of the liquid level does not exceed the height of the lowest position of the inner diameter of the spiral blade, and the front end of the sleeve is provided with a slag discharging hopper. By arranging the liquid pool, the overflow hole, the spiral blade and the slag salvaging assembly, impurities are separated by utilizing centrifugal force when the filter cartridge rotates, and the filter holes are timely flushed by the backflushing device, so that the problem of blockage caused by the fact that light impurities are adhered to the filter cartridge is effectively solved, and the filter cartridge has the advantages of improving the filter efficiency and reducing the maintenance frequency.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering devices, and particularly relates to an impurity filtering device. Background Art

[0002] The methods of water treatment include physical treatment and chemical treatment. Humans have been treating water for quite a long time. Physical methods include using various filter materials with different pore sizes, and using adsorption or blocking methods to exclude impurities in water. Among the adsorption methods, the more important one is adsorption with activated carbon. The blocking method is to pass water through the filter material so that larger impurities cannot pass through, thereby obtaining cleaner water. In addition, physical methods also include the precipitation method, that is, allowing lighter impurities to float on the water surface and be fished out, or heavier impurities to precipitate underwater, and then obtaining them. Chemical methods are to use various chemical drugs to convert impurities in water into substances with less harm to the human body, or to concentrate the impurities. The oldest chemical treatment method should be adding alum to water. After the impurities in the water are aggregated and become larger in volume, the filtration method can be used to remove the impurities.

[0003] The Chinese patent document with the authorization announcement number CN112426787B discloses a microfilter for solid-liquid separation, including a base. A waterproof board is fixedly installed at the top of the middle of the base. A water tank is opened at the bottom of the waterproof board. Support wheels are movably installed at the tops of both ends of the base. A filter cylinder is fixedly installed at the top of the support wheels. Rotating rings adapted to the support wheels are fixedly installed at both ends of the filter cylinder. A feed pipe extending into its interior is arranged in the middle of the back of the filter cylinder. A large gear ring is fixedly installed on the back of the filter cylinder. A motor is fixedly installed at the top of the back of the base. The output end of the motor is fixedly connected to a small gear meshing with the large gear ring. A blanking box is fixedly installed on the front of the feed pipe. A support shaft is fixedly connected to the front of the blanking box. A blanking rotating wheel is installed inside the blanking box and is driven to rotate through a transmission gear, and a rotating shaft is arranged to rotate together with the blanking rotating wheel.

[0004] When the existing rotary drum filtering device filters light impurities, when sewage enters the filter drum, the sewage is discharged through the filter drum, and the impurities remain in the filter drum. As the filter drum rotates, the impurities are conveyed to the other end under the action of gravity and the spiral blade. However, since the mass of the impurities themselves is relatively light after being separated from the liquid, it is easy to cause the impurities to adhere to the filter drum, resulting in the inability to convey the impurities to the other end, and then accumulating in the filter drum, and it is easy to cause the filter holes to be blocked. Therefore, the filtering efficiency is low and frequent maintenance is required. Summary of the Invention

[0005] The present invention provides an impurity filtering device, aiming to solve the problem that the impurities themselves are relatively light and easy to adhere to the filter drum in the related art.

[0006] The filter element of the embodiment of the present invention is a filter element of the present invention, wherein the filter element has a plurality of filter elements, and the filter element has a plurality of filter elements, wherein ...

[0007] The effect is as follows: the water inlet pipe is responsible for conveying sewage to the rear end part of the filter cartridge, and then the motor starts to drive the filter cartridge to rotate. In this process, water flows into the liquid pool through the pores on the filter cartridge wall and is finally discharged from the overflow hole. At the same time, impurities in the sewage are effectively blocked inside the filter cartridge. As the filter cartridge continues to rotate, the spiral blades convey these impurities forward until the impurities are conveyed to the slag collection area. The function of the slag scooping component is to scoop up the impurities in the liquid pool and put them into the slag discharge bucket, which is responsible for discharging the impurities into the external environment. During the rotation of the filter cartridge, the recoil device will be activated, and its function is to flush down the impurities adhered to the filter cartridge. In order to ensure that the impurities cannot cross the spiral blades, the setting of the recoil device breaks the equilibrium state of impurity adhesion and effectively prevents the accumulation of impurities on the inner wall of the filter cartridge. The setting of the slag scooping component realizes the active separation of impurities. The synergistic effect of these key features not only improves the filtration efficiency, but also effectively solves the problem that light impurities are difficult to convey and the filter holes are easily blocked.

[0008] Preferably, the slag scooping assembly includes a plurality of mounting rods fixedly mounted on the inner wall of the filter cartridge in a circular array, a filter plate being hinged on the mounting rods, and a hinge axis is parallel to the axis of the filter cartridge, the hinge axis is located in the middle of the filter plate, both ends of the filter plate are provided with arc-shaped baffles which are rotationally symmetrical with the hinge axis, a positioning assembly for placing the filter plate in a radial position of the filter cartridge is installed between the filter plate and the filter cartridge, a toggle assembly for rotating the passing filter plate 180° relative to the mounting rods is installed above the slag discharge bucket, thereby realizing the functions of automatic slag scooping and slag discharge and improving the impurity filtration efficiency, the filter plate is designed to be able to maintain a suitable posture at different positions, effectively scoop up impurities and dump them into the slag discharge bucket, the provision of the arc-shaped baffle increases the impurity holding capacity of the filter plate and reduces the loss of impurities, the positioning assembly ensures that the filter plate maintains the correct position during the filtration process and improves the accuracy of slag scooping.

[0009] Preferably, the positioning assembly includes a magnet fixedly mounted on an arc-shaped baffle, and a magnetic conductive area is arranged on the inner wall of the filter cartridge near the mounting rod. The magnetic force between the magnet and the magnetic conductive area enables the filter plate to be stably maintained in the radial position of the filter cartridge. The magnetic force can provide appropriate resistance to prevent the filter plate from flipping over on its own, thereby ensuring that impurities can be effectively scooped up. At the same time, the magnetic force can also prevent the filter plate from shaking or shifting during operation, thereby improving the stability and reliability of slag scooping. 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 toggle assembly includes a toggle rod fixedly mounted on the front end of the sleeve, with an elastic rod elastically hinged on the toggle rod, and the toggle rod is located above the slag bucket. When the filter plate contacts the toggle rod, the filter plate rotates, and at the same time, the elastic rod rotates counterclockwise to accumulate elastic potential energy. When the elastic rod passes the middle of the filter plate, the elastic rod releases the elastic potential energy to push the filter plate to continue rotating. When the filter cartridge rotates, the filter plate moves accordingly. When the filter plate contacts the toggle rod, the filter plate starts to rotate around its hinge axis. At the same time, the elastic rod is acted upon by the filter plate, rotates counterclockwise and accumulates elastic potential energy. When the elastic rod rotates to a position passing the middle of the filter plate, the elastic rod releases the accumulated elastic potential energy to push the filter plate to continue rotating.

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

[0012] Preferably, 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 the liquid level is 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, so as to scrape off impurities floating on the liquid surface and prevent impurities from overflowing the arc-shaped baffle, thereby ensuring a smooth filtering process and a good filtering effect.

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

[0014] Preferably, the sludge scraping assembly includes a scraper moving along the length direction of the sleeve. A motion assembly for controlling the movement of the scraper is installed inside the sleeve. A sewage discharge valve is installed at the bottom of the front end of the sleeve. When the filter plate is in its lowest position, that is, when it is located below, the position of the liquid level is precisely controlled above the filter plate and the rotation axis of the mounting rod, and at the same time, it is ensured that the liquid level is located in the lower area of the arc-shaped baffle. The filter plate is connected to the mounting rod through a hinge shaft, and the axis of this hinge shaft is parallel to the axis of the filter cylinder. During the rotation operation of the filter cylinder, once the filter plate rotates to the lower position, the height of the liquid level will be maintained above the filter plate and the rotation axis of the mounting rod, and at the same time, it is ensured that the liquid level is always located 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 enables the filter plate to efficiently capture suspended impurities in the water, while preventing the impurities from overflowing the arc-shaped baffle, ensuring the smoothness of the filtration process and the 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. 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 water inlet end of the water pump is connected to the liquid pool through a water pipe 1, and the water outlet end is connected to the water distribution pipe. The water distribution pipe is arranged along the length direction of the sleeve and is fixedly installed inside the sleeve. A plurality of water outlet holes are opened along the length direction on the side of the water distribution pipe close to the filter cylinder. During the operation of the water pump, it will pump the liquid in the liquid pool into the water distribution pipe, and then the liquid forms a uniform water curtain through the plurality of water outlet holes on the water distribution pipe and sprays onto the surface of the filter cylinder. When the filter cylinder starts to rotate, those parts that have just separated from the liquid pool will carry the liquid film and the impurities therein due to the action of centrifugal force. At this time, the water flow sprayed by the water distribution pipe will impact these parts, effectively stripping the impurities attached to the filter holes. Since the water distribution pipe is arranged along the length direction of the sleeve and the water outlet holes are evenly distributed, the water flow can cover the entire separation area of the filter cylinder, thus avoiding the problem of local blockage. The recycling of the liquid in the liquid pool through the water pump not only ensures the continuous supply of the backwashing water source, but also reduces the deposition of impurities in the liquid pool through the scouring action of the water flow. This series of processes work in coordination with the rotation of the filter cylinder and the slag discharge action of the slag fishing assembly, effectively preventing the blockage of the filter holes and significantly improving the filtration efficiency.

[0017] Adopting the above technical solutions, the beneficial effects of the present invention are as follows: 1. The water inlet pipe is responsible for transporting sewage to the rear end of the filter cartridge, and then the motor starts to drive the filter cartridge to rotate. In this process, water flows into the liquid pool through the pores on the filter cartridge wall and is discharged through the overflow hole. At the same time, the impurities in the sewage are effectively blocked inside the filter cartridge. As the filter cartridge continues to rotate, the spiral blades begin to push these impurities forward and guide them into the slag collection area. While the filter cartridge rotates, the mounting rod drives the filter plate to rotate along the axis of the sleeve. At this time, the positioning assembly begins to work, fixing the filter plate at a specific radial position to ensure that the front end of the filter plate can smoothly receive the push of the spiral blades. As the filter drum continues to rotate, the filter plate will move to the upper position of the slag discharge bucket. When the lever contacts the lower part of the filter plate, it will exert a thrust to make the filter plate overcome the attraction between the magnet and the iron sheet, thereby realizing rotation. The filter plate and the spring rod will resist each other. When the spring rod passes the hinge of the filter plate, it will release the elastic potential energy accumulated before and push the filter plate to continue rotating. After the filter plate rotates 180 degrees, another magnet and the iron sheet attract each other and fix the filter plate in the radial position of the filter drum again. During the flipping process, due to the effect of gravity, the impurities will fall into the slag discharge bucket, thus completing the entire slag discharge process. 2. After the filter plate is separated from the toggle assembly, the arc baffle can effectively reset it to the initial position by the effect of magnetic attraction, so as to ensure that the impurity collection action can continue in the next cycle. When the filter plate is immersed in sewage again, the sewage will backwash the filter surface of the filter plate, which can effectively prevent impurities from adhering to the filter plate. At the same time, when the filter plate enters the sewage, it is ensured that the top of the filter plate is always above the liquid surface, so as to prevent impurities from passing over the top and adhering to the filter plate. During the rotation of the filter cylinder, those parts that have just been separated from the liquid pool will carry liquid film and impurities due to centrifugal action. At this time, the water flow sprayed by the water distribution pipe will impact these parts and effectively peel off the impurities attached to the filter holes. Since the water distribution pipe is arranged along the length of the sleeve and the water outlet holes are evenly distributed, the water flow can cover the entire separation area of ​​the filter cartridge, thereby avoiding the problem of local blockage. The liquid in the liquid pool is recycled by the water pump, which not only ensures the continuous supply of backwash water source, but also reduces the deposition of impurities in the liquid pool through the flushing effect of the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a side view of the present invention.

[0020] Figure 3 It is a side view of the present invention without the sleeve.

[0021] Figure 4 It is a schematic diagram of the structure inside the filter cartridge of the present invention.

[0022] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0023] Figure 6 Schematic diagram of liquid level.

[0024] Figure 7 A side view of the recoil device.

[0025] Figure 8 A side view of the toggle assembly.

[0026] Figure 9 It is a side view of the scraper assembly.

[0027] Reference numerals: 1. Sleeve; 11. Overflow hole; 12. Drain valve; 2. Driving source; 3. Water inlet pipe; 4. Filter cartridge; 41. Spiral blade; 42. Edge wrapping; 5. Slag bucket; 6. Slag scoop assembly; 61. Mounting rod; 62. Filter plate; 621. Arc baffle; 63. Positioning assembly; 631. Magnet; 632. Magnetic conductive area; 64. Toggle assembly; 641. Toggle rod; 642. Spring rod; 7. Recoil device; 71. Water pump; 72. Water distribution pipe; 8. Sludge scraper assembly; 81. Scraper; 82. Screw rod; 83. Guide rod. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] like Figures 1-9 As shown, an impurity filtering device comprises: a sleeve 1, a driving source 2, a water inlet pipe 3, a filter cartridge 4, a slag discharge bucket 5, a slag scoop assembly 6, and a recoil device 7. The sleeve 1 is installed on the ground through legs, so that a liquid pool is formed at the bottom of the sleeve 1. An overflow hole 11 for allowing liquid in the liquid pool to flow out is provided on one side of the sleeve 1. The filter cartridge 4 is rotatably installed in the sleeve 1. The driving source 2 is installed on the sleeve 1 and is used to drive the filter cartridge 4 to rotate around its axis. The water inlet pipe 3 is arranged at the rear end of the sleeve 1, and the water inlet pipe 3 extends into the filter cartridge 4, so as to provide the filter cartridge 4 with a liquid. Sewage is discharged from the cylinder 4, the slag bucket 5 is fixedly installed at the front end of the sleeve 1, the slag scoop assembly 6 is installed at the front end of the filter cylinder 4, the water inlet pipe 3 transports the sewage to the rear end of the filter cylinder 4, the driving source 2 drives the filter cylinder 4 to rotate, and 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 in the filter cylinder 4. The slag scoop assembly 6 is used to scoop up impurities in the liquid pool and then put the impurities into the slag bucket 5. The impurities are discharged to the outside through the slag bucket 5. When the filter cylinder 4 rotates, the impurities adhered to the filter cylinder 4 are flushed down by the recoil device 7.

[0030] The filter cartridge 4 adopts a porous metal mesh structure. Both the front and rear ends of the filter cartridge 4 are provided with a rim 42 extending toward the middle thereof. The solid-liquid separation function is realized through the surface sieve holes. The inner wall of the filter cartridge 4 is fixedly installed with a spiral leaf 41. The front end of the spiral leaf 41 and the front end of the filter cartridge 4 form a slag collecting area for installing the slag scooping assembly 6. The outer side of the filter cartridge 4 is fixedly provided with a coaxial mounting ring therewith. A tugboat group adapted to the mounting ring is provided in the sleeve 1. The driving source 2 drives the tugboat group to rotate, so that the filter cartridge 4 is rotatably installed in the sleeve 1, and the sewage The light impurities enter the filter cartridge 4 through the water inlet pipe 3, and float or suspend in the sewage. Then, as the filter cartridge 4 rotates, the spiral blades 41 push the impurities forward, thereby causing the impurities to move forward. Due to the rotation of the filter cartridge 4, the impurities will adhere to the part of the filter cartridge 4 that has just left the liquid surface. Therefore, the backwash device 7 sprays water on the part of the filter cartridge 4 that has just separated from the liquid pool, and washes down the impurities adhered to the inner wall of the filter cartridge 4. When the impurities are transported to the slag collection area, the slag scooping assembly 6 scoops up the impurities in the liquid pool, and then puts the impurities into the slag discharge bucket 5.

[0031] The slag scooping assembly 6 includes a plurality of mounting rods 61, a plurality of filter plates 62, a positioning assembly 63 and a toggle assembly 64. The mounting rods 61 are arranged in groups of two, and all groups of mounting rods 61 are fixedly installed in a circular array in the slag collecting area of ​​the filter cartridge 4. A rotating shaft is arranged in the middle of the front and rear sides of the filter plate 62, and is respectively hinged to the two mounting rods 61 of the same group, and the hinge axis is parallel to the axis of the filter cartridge 4. Both ends of the filter plate 62 are provided with arc-shaped baffles 621, and the two arc-shaped baffles 621 are rotationally symmetrical about the hinge axis. The front and rear ends of the arc-shaped baffles 621 are connected with triangular plates. When the arc-shaped baffles 621 are at the position closest to the inner wall of the filter cartridge 4, there is a gap between the arc-shaped baffles 621 and the inner wall of the filter cartridge 4, thereby avoiding contact between the two and causing the filter plate 62 to be unable to rotate. The positioning assembly 63 is used to make the filter plate 62 be located 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 scoop assembly 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, so that the impurities move upward. During the upward movement, the arc baffle 621 blocks the impurities to prevent them from sliding. When the filter plate 62 passes above the slag discharge bucket 5, the toggle assembly 64 rotates the filter plate 62 180°, and at the same time, the arc baffle 621 no longer blocks the impurities. The impurities fall from the filter plate 62 into the slag discharge bucket 5. When the filter plate 62 enters the sewage again, the sewage backwashes the filtering surface of the filter plate 62, thereby preventing impurities from adhering to the filter plate 62.

[0032] The positioning assembly 63 includes two magnets 631, which are respectively mounted on two arc-shaped baffles 621 at both ends of the filter plate 62. A magnetic conductive area 632 is provided on the inner wall of the filter cartridge 4 between the two mounting rods 61 of the same group. An iron sheet is provided in the magnetic conductive area 632. When the magnet 631 approaches the iron sheet, an attraction is generated between the magnet 631 and the iron sheet, so that the filter plate 62 is located in the radial position of the filter cartridge 4. When the filter cartridge 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 assembly 63 fixes the filter plate 62 in the radial position, so that the front end of the filter plate 62 bears The impurities pushed by the spiral blade 41, as the filter cylinder 4 continues to rotate, the filter plate 62 moves to the top of the slag discharge bucket 5. At this time, the toggle assembly 64 contacts the filter plate 62, pushing it to rotate around the hinge axis. When the filter plate 62 rotates to a certain angle, the impurities fall into the slag discharge bucket 5 due to gravity, completing the slag discharge. During the flipping process, the arc-shaped baffle 621 is reset to its initial position through magnetic attraction after the filter plate 62 is separated from the toggle assembly 64, ensuring the continuity of the impurity collection action of the next cycle. When the filter plate 62 enters the sewage, the top of the filter plate 62 is always above the liquid level to prevent impurities from passing through the filter plate 62 from the top.

[0033] The toggle assembly 64 includes a toggle rod 641 and an elastic rod 642. The toggle rod 641 is fixedly mounted at the front end of the sleeve 1 and extends into the filter cartridge 4. The elastic rod 642 is elastically hinged to the toggle rod 641 through a torsion spring. Assuming that the maximum height that the axis of the filter plate 62 can reach is h1, and the height of the top of the elastic rod 642 in the initial state is h2, then h2>h1, the height of the toggle rod 641 is less than h1, and when the filter cartridge 4 rotates with the filter plate 62, the toggle rod 64 1 abuts against the lower half of the filter plate 62, so that the filter plate 62 overcomes the attraction between the magnet 631 and the iron sheet and rotates, and the filter plate 62 abuts against the elastic rod 642 to rotate the elastic rod 642. When the elastic rod 642 passes the hinge of the filter plate 62, the elastic rod 642 releases elastic potential energy to push the filter plate 62 to continue rotating, so that after the filter plate 62 rotates 180°, another magnet 631 and the iron sheet attract each other again, so that the filter plate 62 is in the radial position of the filter cartridge 4 again.

[0034] The top and bottom of the slag discharge hopper 5 are both open structures. The overall shape of the slag discharge hopper 5 is an inverted trapezoidal shell. The width of its top opening is greater than that of the bottom opening. 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 end opening of the sleeve 1. The bottom opening extends to the waste collection area outside the sleeve 1. The side wall of the shell of the slag discharge hopper 5 gradually contracts from top to bottom to form a diversion 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 where the top opening is aligned with the front end opening of the sleeve 1 ensures that the slag fishing assembly 6 can directly put impurities into the slag discharge hopper 5, while the contraction 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 the operation of the equipment, improving the stability of the impurity discharge process.

[0035] Such as Figure 1 , Figure 6 and Figure 7As shown in the figure, the backwashing device 7 includes a water pump 71 and a water distribution pipe 72. The water inlet end of the water pump 71 is connected to the liquid pool through a first water pipe, and the water outlet end is connected to the water distribution pipe 72 extending along the length direction of the sleeve 1. The water distribution pipe 72 is fixedly installed inside the sleeve 1, and a number of water outlet holes are evenly opened along the length direction on the side close to the filter cylinder 4. When the water pump 71 is started, the water in the liquid pool 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 end of the water pump 71 is connected to the liquid pool through a first water pipe, which can realize the recycling of the liquid in the liquid pool and reduce the waste of water resources. The water distribution pipe 72 is arranged along the length direction of the sleeve 1 and fixed inside the sleeve 1 to ensure that the backwashing water flow covers the entire length of the filter cylinder 4. A plurality of water outlet holes are opened on the side of the water distribution pipe 72 close to the filter cylinder 4, so that the water flow is evenly distributed along the axis of the filter cylinder 4. The distance between the water outlet holes can be adjusted according to the rotation speed of the filter cylinder 4 and the degree of impurity adhesion. When the water pump 71 operates, the liquid in the liquid pool is sucked into the water distribution pipe 72, and the liquid forms a uniform water curtain through a plurality of water outlet holes and is sprayed onto the surface of the filter cylinder 4. When the filter cylinder 4 rotates, the part that has just separated from the liquid pool carries a liquid film and impurities due to centrifugal force. At this time, the water flow sprayed by the water distribution pipe 72 impacts this part, stripping the impurities attached to the filter holes. Since the water distribution pipe 72 is arranged along the length direction 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 through the water pump 71, which not only ensures the continuous supply of the backwashing water source but also reduces the deposition of impurities in the liquid pool through the water flow scouring. This process cooperates with the rotation of the filter cylinder 4 to effectively prevent the blockage of the filter holes and improve the filtration efficiency. During the backwashing process, the water flow continuously impacts the surface area of the cylinder of the filter cylinder 4 that has separated from the liquid pool. This area is prone to residual impurities due to the weakening of the liquid surface tension. The impact force of the water flow can destroy the adhesion state between the impurities and the surface of the filter cylinder 4, prompting the impurities to fall back into the liquid pool with the water flow, avoiding the blockage of the pores of the filter cylinder 4 formed by the accumulation of impurities. This design realizes the online cleaning function, effectively maintains the penetration efficiency of the filter cylinder 4, and extends the continuous operation period of the equipment.

[0036] Since tiny impurities will precipitate at the bottom of the sleeve 1, a trapezoidal sedimentation area is provided at the bottom of the sleeve 1, and a sludge scraping assembly 8 is arranged in the sedimentation area; The sludge scraping assembly 8 includes a scraping plate 81 and a motion assembly. The scraping plate 81 can translate along the length direction of the sleeve 1. The motion assembly is used to drive the scraping plate 81 to move on the inner bottom surface of the sleeve 1. The sewage discharge valve 12 is arranged at the bottom of the front end of the sleeve 1, corresponding to the end of the moving path of the scraping plate 81. The valve can adopt a gate structure with manual or automatic control. When the scraping plate 81 moves along the length direction 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 towards the sewage discharge valve 12. When the scraping plate 81 moves to the position of the sewage discharge valve 12, the valve opens, and the sediment is discharged with the liquid. The scraping plate 81 can achieve continuous dredging through reciprocating motion or one-way motion in cooperation with periodic valve opening and closing. For example, when the scraping plate 81 completes each one-way movement, the motion assembly controls it to reset to the initial position. At the same time, the sewage discharge valve 12 opens when the scraping plate 81 reaches the end point and closes after the dredging is completed. Thus, the sediment is periodically removed, avoiding the accumulation of impurities in the liquid pool and affecting the overflow efficiency.

[0037] The sludge scraping assembly 8 includes a lead screw 82 extending along the length direction of the sleeve 1. A scraping plate 81 that is threadedly engaged with the lead screw 82 is sleeved outside the lead screw 82. One end of the lead screw 82 is connected to the output shaft of a stepping motor through a coupling. The stepping 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 arranged inside the sleeve 1. The guide rod 83 passes through the scraping plate 81 and is slidably engaged with the scraping plate 81. A downwardly inclined conical sewage pipe is welded to the bottom of the front end of the sleeve 1. The end of the sewage pipe is flange-connected to the sewage discharge valve 12, preferably a pneumatic butterfly valve. The pneumatic butterfly valve is connected to an external control box through a wire. When the scraping plate 81 is driven by the stepping motor to move along the length direction of the sleeve 1, the gap between the bottom surface of the scraping plate 81 and the inner bottom surface of the sleeve 1 is controlled within 2 - 3 millimeters. The sludge deposited at the bottom of the liquid pool is pushed into the conical sewage pipe by the scraping plate 81. The pneumatic butterfly valve is periodically opened under the command of the control box to discharge the sludge, effectively removing the sludge deposited at the bottom of the liquid pool in the sleeve 1, avoiding the blockage of the bottom of the filter cartridge 4 caused by long-term sludge accumulation. At the same time, through the coordinated action of mechanical scraping and the sewage discharge valve 12, the directional collection and centralized discharge of the sediment are realized, reducing the frequency of manual cleaning. The continuous movement of the scraping plate 81 under the control of the motion assembly further ensures that the sediment is completely pushed to the sewage outlet, preventing the secondary deposition of residues and affecting the filtration efficiency.

[0038] Working principle: The water inlet pipe 3 conveys 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, so that the impurities enter the slag collection area. While 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 assembly 63 fixes the filter plate 62 at the radial position, so that the front end of the filter plate 62 receives the impurities pushed by the spiral blade 41. As the filter cylinder 4 continues to rotate, the filter plate 62 moves above the slag discharge hopper 5, and the dial rod 641 abuts against the lower half of the filter plate 62, so that the filter plate 62 rotates against the attraction between the magnet 631 and the iron sheet, and the filter plate 62 abuts against the elastic rod 642 to make the elastic rod 642 rotate. When the elastic rod 642 passes over the hinge of the filter plate 62, the elastic rod 642 releases elastic potential energy and pushes the filter plate 62 to continue rotating, so that after the filter plate 62 rotates 180°, another magnet 631 attracts the iron sheet again, and the filter plate 62 is again in the radial position of the filter cylinder 4. During the flipping process, the impurities fall into the slag discharge hopper 5 due to gravity, and slag discharge is completed. After the filter plate 62 disengages from the dialing assembly 64, the arc-shaped baffle 621 is reset to its initial position by magnetic attraction, ensuring the coherence of the impurity collection action in the next cycle. When the filter plate 62 enters the sewage again, the sewage flushes the filtering surface of the filter plate 62, so as to prevent impurities from adhering to the filter plate 62. And when the filter plate 62 enters the sewage, the top end of the filter plate 62 is always above the liquid level, preventing impurities from passing over the filter plate 62 from the top. When the filter cylinder 4 rotates, the part that just disengages from the liquid pool carries a liquid film and impurities due to centrifugal force. At this time, the water flow sprayed by the water distribution pipe 72 impacts this part, stripping the impurities attached to the filter holes. Since the water distribution pipe 72 is arranged along the length direction of the sleeve 1 and the water outlet holes are evenly distributed, the water flow can cover the entire disengaging 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 the backwashing water source, but also reduces the deposition of impurities in the liquid pool through water flow scouring.

[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An impurity filtering device, comprising a sleeve (1), a filter cartridge (4) disposed within the sleeve (1), and a drive source (2) for driving the filter cartridge (4) to rotate. A water inlet pipe (3) for introducing water into the filter cartridge (4) is provided at the rear end of the sleeve (1), characterized in that, A liquid pool is formed at the bottom of the sleeve (1), and an overflow hole (11) for allowing liquid in the liquid pool to flow out is provided on one side of the sleeve (1). The inner wall of the filter cartridge (4) is fixedly connected with a spiral blade (41). The bottom of the filter cartridge (4) 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 (41). A slag discharge bucket (5) is installed at the front end of the sleeve (1). A slag collection area is formed between the front end of the spiral blade (41) and the front end of the filter cartridge (4). A slag scooping assembly (6) is provided at the front end of the filter cartridge (4). When the filter cartridge (4) rotates, the slag scooping assembly (6) scoops up impurities in the slag collection area and then puts them into the slag discharge bucket (5). A recoil device (7) is installed in the sleeve (1). The recoil device (7) includes a plurality of water outlet ends, which are evenly arranged along the length direction of the sleeve (1). When the filter cartridge (4) rotates, the water outlet ends discharge water, so that the water flow is sprayed on the part of the filter cartridge (4) that has just been separated from the liquid pool.

2. The impurity filtering device according to claim 1, wherein The slag scooping assembly (6) comprises a plurality of mounting rods (61) fixedly mounted on the inner wall of the filter barrel (4) in a circumferential array, a filter plate (62) being hingedly connected to the mounting rods (61), and an axis of the hinge being parallel to an axis of the filter barrel (4), the hinge axis being located in the middle of the filter plate (62), arc-shaped baffles (621) being rotationally symmetrical about the hinge axis being arranged at both ends of the filter plate (62), a positioning assembly (63) for placing the filter plate (62) in a radial position of the filter barrel (4) being installed between the filter plate (62) and the filter barrel (4), and a toggle assembly (64) for causing the filter plate (62) passing through to rotate 180 degrees relative to the mounting rods (61) being installed above the slag discharge bucket (5).

3. The impurity filtering device according to claim 2, wherein The positioning assembly (63) comprises a magnet (631) fixedly mounted on the arc-shaped baffle (621), and a magnetic conductive area (632) is arranged on the inner wall of the filter cartridge (4) at a position close to the mounting rod (61).

4. The impurity filtering device according to claim 3, wherein The toggle assembly (64) comprises a toggle rod (641) fixedly mounted on the front end of the sleeve (1); a spring rod (642) is elastically hinged on the toggle rod (641); the toggle rod (641) is located above the slag discharge bucket (5); when the filter plate (62) contacts the toggle rod (641), the filter plate (62) rotates, and at the same time the spring rod (642) rotates counterclockwise to accumulate elastic potential energy; when the spring rod (642) passes the middle of the filter plate (62), the spring rod (642) releases the elastic potential energy, pushing the filter plate (62) to continue rotating.

5. The impurity filtering device according to claim 4, characterized in that, The front and rear ends of the arc-shaped baffle plate (621) are connected to triangular plates.

6. The impurity filtering device according to claim 4, characterized in that When the filter plate (62) is located at the bottom, the liquid level is located above the rotation axis of the filter plate (62) and the mounting rod (61), and the liquid level is located below the arc-shaped baffle plate (621).

7. The impurity filtering device according to claim 1, wherein The inner bottom of the sleeve (1) is provided with a mud scraping assembly (8).

8. The impurity filtering device according to claim 7, characterized in that, The mud scraping assembly (8) comprises a scraper (81) that moves along the length direction of the sleeve (1), a motion assembly for controlling the movement of the scraper (81) is installed in the sleeve (1), and a sewage discharge valve (12) is installed at the bottom of the front end of the sleeve (1).

9. The impurity filtering device according to claim 1, wherein The top and bottom ends of the slag discharge bucket (5) are open, and the slag discharge bucket (5) is wide at the top and narrow at the bottom. The slag discharge bucket (5) is fixedly mounted on the sleeve (1).

10. The impurity filtering device according to claim 1, characterized in that, The recoil device (7) includes a water pump (71) and a water distribution pipe (72). The water inlet end of the water pump (71) is communicated with a liquid pool through a first water pipe, and the water outlet end is communicated with the water distribution pipe (72). The water distribution pipe (72) is arranged along the length direction of the sleeve (1) and fixedly installed in the sleeve (1). A plurality of water outlet holes are formed along the length direction on the side of the water distribution pipe (72) close to the filter cartridge (4).

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