A sand-water separation device and separation method

Abstract

The present invention discloses a sand-water separation device and a separation method, belonging to the technical field of sand-water separation devices. The sand-water separation device includes a cylinder body and a filter cylinder rotatably arranged inside the cylinder body. A through groove is opened on the inner bottom surface of the cylinder body. An inlet water pipe is fixedly installed on the outer side of the cylinder body, and the inlet water pipe is communicated with the cylinder body. A drain pipe is arranged inside the filter cylinder; through the cooperation of the sealing component and the cleaning component, when the stone stuck on the filter hole fits with the sealing plate, as the filter cylinder rotates, it can prompt the sealing plate to rotate relative to the filter cylinder, so that the sewage in the filter cylinder can flow from the filter cylinder to the inside of the diversion frame. Driven by the water flow and the elastic force of the third spring, the cleaning plate can be driven to rotate outwards. When the needle plate fits with the filter cylinder, the stone in the filter hole can be cleaned by the inserted needles, avoiding damage to the filter cylinder caused by the stone, which is beneficial to protecting the filter cylinder and prolonging its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of sand-water separation devices, and particularly relates to a sand-water separation device and a separation method. Background Art

[0002] Sand washing is the main way for sand and gravel plants to wash materials such as ores and sand and gravel. After sand washing is completed, it is necessary to separate the mixture of sand and gravel and water in order to obtain the required sand and gravel.

[0003] Chinese Patent CN216367018U discloses a sand and gravel muddy water separation device, which can accelerate the precipitation and separation of sand and gravel, replace the traditional static operation method, improve the working efficiency of the device, and reduce the moisture content of sand and gravel separation at the same time; it includes a base, a fixing plate, multiple groups of support columns, a fixing pipe, a settling cylinder, a sealing plate, a rotating pipe, a connecting plate, a filtering cylinder, a first rotating shaft, a first conveying auger, a collecting box, a suction pump, a suction pipe, a discharging component and a driving component. The fixing plate is fixedly installed on the upper end surface of the base through multiple groups of support columns. The fixing pipe penetrates and is fixedly installed on the fixing plate. The upper end of the fixing pipe is communicated with the settling cylinder. The left part of the settling cylinder is communicated with a water inlet pipe. The sealing plate is hermetically installed on the upper end of the settling cylinder. The rotating pipe penetrates and is fixedly installed on the sealing plate, and the rotating pipe is drivingly connected with the driving component. The driving component is installed on the sealing plate. The connecting plate is fixedly installed on the upper end of the filtering cylinder. The lower end of the rotating pipe is fixedly connected with the connecting plate.

[0004] The above device cleans the stones stuck on the filtering cylinder through the provided scraping plate. However, in actual use, when the stones are stuck on the filtering cylinder and are relatively firm, the scraping plate will generate a large pressure on them after contacting the stones, which will in turn increase the acting force between the stones and the filtering cylinder, causing damage to the filtering cylinder and thus affecting its subsequent use. Therefore, the above device still has room for improvement.

[0005] Therefore, it is necessary to provide a sand-water separation device and a separation method to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a sand-water separation device and a separation method to solve the problem that in the above background art, the existing device cleans the stones stuck on the filtering cylinder through the provided scraping plate. However, in actual use, when the stones are stuck on the filtering cylinder and are relatively firm, the scraping plate will generate a large pressure on them after contacting the stones, which will in turn increase the acting force between the stones and the filtering cylinder, causing damage to the filtering cylinder.

[0007] Based on the above ideas, the present invention provides the following technical solution: A sand-water separation device, comprising a cylinder body and a filter cylinder rotatably arranged inside the cylinder body. A through groove is formed on the bottom surface inside the cylinder body. An inlet pipe is fixedly installed on the outer side of the cylinder body, and the inlet pipe is communicated with the cylinder body. A drain pipe is arranged inside the filter cylinder, the bottom end of the drain pipe extends into the filter cylinder, and the top end of the drain pipe extends outside the cylinder body. A flow guide frame is arranged between the cylinder body and the filter cylinder, the flow guide frame is fixedly connected with the cylinder body, and a sealing component is arranged on the side of the flow guide frame close to the filter cylinder. A plurality of cleaning components are evenly arranged inside the filter cylinder, and the cleaning components are hinged to the filter cylinder;

[0008] When the filter cylinder drives the sealing component to rotate relative to the flow guide frame, the sewage in the filter cylinder moves towards the direction of the flow guide frame and drives the cleaning component to rotate towards the direction of the filter cylinder to clean the filter holes on the filter cylinder.

[0009] As a further solution of the present invention: A plurality of through filter holes are evenly formed on the outer circumferential surface of the filter cylinder. A material guide cylinder is arranged below the cylinder body. A funnel-shaped flow guide cylinder is fixedly connected below the cylinder body. A connecting pipe is fixedly arranged between the flow guide cylinder and the material guide cylinder. A sleeve is fixedly connected to the top end surface of the filter cylinder, the sleeve penetrates through the cylinder body and is rotatably connected thereto. A vertical shaft is fixedly connected to the bottom end surface of the filter cylinder, the vertical shaft passes through the cylinder body downward and extends into the flow guide cylinder, and a first spiral plate is fixedly arranged on the outer side of the vertical shaft and is located at the bottom end inside the flow guide cylinder.

[0010] As a further solution of the present invention: The sealing component includes a sealing plate arranged between the flow guide frame and the filter cylinder, the sealing plate is elastically connected with the flow guide frame. Both sides of the sealing plate are arc-shaped and are respectively in contact with the flow guide frame and the filter cylinder. A notch is formed on one side of the flow guide frame, a baffle is slidably arranged at the notch, and the baffle is elastically connected with the flow guide frame. The baffle is located on the side of the sealing plate close to the flow guide frame, and the inner side surface of the end of the baffle close to the sealing plate is a slope.

[0011] As a further solution of the present invention: The cleaning component includes a cleaning plate. A plurality of convex strips are fixedly connected to the inner wall of the filter cylinder, the cleaning plate is hinged to the convex strips, a sliding rod is fixedly connected to the convex strips, a sleeve rod is fixedly connected to the cleaning plate, one end of the sliding rod extends into the sleeve rod and is slidably connected thereto. A third spring is arranged inside the sleeve rod, and a needle plate is fixedly arranged on the outer side surface of the cleaning plate, and a plurality of pins are fixedly arranged on the needle plate.

[0012] As a further solution of the present invention: A driven gear is fixedly sleeved on the outer side of the sleeve, and a driving gear is meshed with the outer side of the driven gear.

[0013] As a further solution of the present invention: A flow guide pipe is fixedly installed at the bottom end of the flow guide cylinder, and the top end of the flow guide pipe extends into the flow guide frame and is communicated with it.

[0014] As a further solution of the present invention: a connecting shaft is rotatably arranged inside the material guiding cylinder, and a second spiral plate is fixedly arranged on the outer side of the connecting shaft.

[0015] As a further solution of the present invention: a convex block is fixedly connected to one side of the sealing plate, a guiding rod is fixedly connected to the side of the guiding flow frame close to the convex block, the guiding rod penetrates through the convex block and is slidably connected therewith, and a retaining disc is fixedly connected to the end of the guiding rod away from the guiding flow frame. A first spring is sleeved on the outer side of the guiding rod, and the first spring is located between the convex block and the retaining disc.

[0016] As a further solution of the present invention: a connecting plate is fixedly connected to the outer side surface of the baffle plate, a connecting block is fixedly arranged on the side of the connecting plate away from the guiding flow frame, a protrusion is fixedly connected to the side of the guiding flow frame close to the connecting plate, a cross bar is fixedly arranged on the protrusion, the cross bar penetrates through the connecting block and is slidably connected therewith, and a second spring is sleeved on the outer side of the cross bar, and the second spring is located between the protrusion and the connecting block.

[0017] A method for separating sand and water by using the above sand-water separation device includes the following steps:

[0018] S1. Introduce the wastewater to be treated into the space between the cylinder body and the filter cylinder through the water inlet pipe. The sand and gravel will sink to the bottom under the action of gravity. The filter cylinder drives the first spiral plate on its outer side to rotate through the vertical shaft, and guides the sand and gravel in the guiding cylinder into the interior of the material guiding cylinder, and then the second spiral plate can convey the sand and gravel to a specified position;

[0019] S2. When the stuck stone contacts the sealing plate, as the filter cylinder rotates, the stone will drive the sealing plate to rotate relative to the guiding flow frame. When the sealing plate is staggered from the baffle plate, as the sewage flows, the cleaning plate gradually fits with the filter cylinder. During this process, the stuck sand and gravel can be cleaned by the needle plate.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of the set sealing component and cleaning component, when the stone stuck on the filter hole fits with the sealing plate, as the filter cylinder rotates, it can promote the sealing plate to rotate relative to the filter cylinder, so that the sewage in the filter cylinder can flow from the filter cylinder into the interior of the guiding flow frame. Driven by the water flow and the elastic force of the third spring, the cleaning plate can be driven to rotate outwards. When the needle plate fits with the filter cylinder, the stone in the filter hole can be cleaned by the inserted needles, avoiding damage to the filter cylinder caused by the stone, which is beneficial to protecting the filter cylinder and prolonging its service life. Brief Description of the Drawings

[0021] The following further illustrates the present invention in conjunction with the drawings and embodiments:

[0022] Figure 1 is the overall structural schematic diagram of the present invention;

[0023] Figure 2 is a schematic three-dimensional structure diagram of the present invention;

[0024] Figure 3 is a schematic structure diagram of the diversion frame, filter cartridge and cylinder body of the present invention;

[0025] Figure 4 is a distribution diagram of the cleaning plates of the present invention;

[0026] Figure 5 is a schematic structure diagram of the filter cartridge, sealing plate and diversion frame of the present invention;

[0027] Figure 6 is a schematic structure diagram of the baffle plate, connecting plate, sealing plate and convex block of the present invention;

[0028] Figure 7 is a schematic structure diagram of the vertical shaft and the first spiral plate of the present invention;

[0029] Figure 8 is the present invention Figure 4 an enlarged schematic structure diagram at position A;

[0030] Figure 9 is a schematic structure diagram of the third spring of the present invention;

[0031] Figure 10 is a schematic structure diagram of the needle plate of the present invention.

[0032] In the figure: 1, cylinder body; 2, sleeve; 3, drain pipe; 4, water inlet pipe; 5, material guiding cylinder; 6, driving gear; 7, driven gear; 8, fixed bracket; 9, connecting pipe; 10, filter cartridge; 11, first spring; 12, guide rod; 13, diversion frame; 14, sealing plate; 15, connecting plate; 16, through groove; 17, filter hole; 18, cleaning plate; 19, convex block; 20, first spiral plate; 21, vertical shaft; 22, convex strip; 23, protrusion; 24, cross bar; 25, second spring; 26, connecting block; 27, baffle plate; 28, inclined surface; 29, diversion cylinder; 30, sleeve rod; 31, sliding rod; 32, third spring; 33, needle plate; 34, diversion pipe; 35, second spiral plate. Detailed implementation manners

[0033] As Figures 1-3As shown in the figure, a sand-water separation device and a separation method include a cylinder body 1 and a filter cylinder 10 rotatably arranged inside the cylinder body 1. The filter cylinder 10 is of a columnar structure, and a plurality of through filter holes 17 are evenly arranged on the outer circumferential surface of the filter cylinder 10. A material guiding cylinder 5 is arranged below the cylinder body 1. Specifically, a funnel-shaped guiding cylinder 29 is fixedly connected below the cylinder body 1, and a connecting pipe 9 is fixedly arranged between the guiding cylinder 29 and the material guiding cylinder 5. The connecting pipe 9 is communicated with the cylinder body 1 and the material guiding cylinder 5. A connecting shaft is rotatably arranged inside the material guiding cylinder 5, and a second spiral plate 35 is fixedly arranged on the outer side of the connecting shaft. One end of the connecting shaft passes through the material guiding cylinder 5 and is fixedly connected to an external first motor.

[0034] Further, a sleeve 2 is fixedly connected to the top end surface of the filter cylinder 10. The sleeve 2 passes through the cylinder body 1 and is rotatably connected to it. A vertical shaft 21 is fixedly connected to the bottom end surface of the filter cylinder 10. The vertical shaft 21 passes downward through the cylinder body 1 and extends into the guiding cylinder 29, and the vertical shaft 21 is rotationally matched with the cylinder body 1. A first spiral plate 20 is fixedly arranged on the outer side of the vertical shaft 21. The first spiral plate 20 is located at the bottom end inside the guiding cylinder 29 to facilitate guiding the sand put into the cylinder body 1 into the material guiding cylinder 5.

[0035] A drain pipe 3 is arranged inside the filter cylinder 10. Specifically, the bottom end of the drain pipe 3 extends into the filter cylinder 10, and the top end of the drain pipe 3 passes through the sleeve 2 and is rotatably connected to it. A fixed support 8 is fixedly arranged on the top of the cylinder body 1. The fixed support 8 is fixedly connected to the drain pipe 3. During actual use, a water inlet pipe 4 is fixedly installed on the outer side of the cylinder body 1. The water inlet pipe 4 is communicated with the cylinder body 1. External sand and water are led into the space between the cylinder body 1 and the filter cylinder 10 through the water inlet pipe 4. The sand falls to the bottom of the guiding cylinder 29, and the rotating first spiral plate 20 can send the sand into the material guiding cylinder 5. At this time, the first motor drives the second spiral plate 35 to rotate to lead the sand entering the material guiding cylinder 5 to a specified position. Of course, the end of the material guiding cylinder 5 away from the first motor is open to facilitate the discharge of sand.

[0036] As Figures 2-5 shown in the figure, a guiding frame 13 is arranged between the cylinder body 1 and the filter cylinder 10. The guiding frame 13 is fixedly connected to the cylinder body 1, and a sealing component is arranged on the side of the guiding frame 13 close to the filter cylinder 10. A plurality of groups of cleaning components are evenly arranged inside the filter cylinder 10. The cleaning components are hinged to the filter cylinder 10. During actual use, when the filter cylinder 10 drives the sealing component to rotate relative to the guiding frame 13, the cleaning components are located between the filter cylinder 10 and the guiding frame 13. When the sewage in the filter cylinder 10 moves towards the guiding frame 13, it can drive the cleaning components to rotate towards the filter cylinder 10 to clean the filter holes 17 on the filter cylinder 10, avoiding larger stones getting stuck in the filter holes 17 and causing damage to the filter cylinder 10.

[0037] As Figures 2-8As shown in Figures 9 and 10, the above-mentioned sealing assembly includes a sealing plate 14 disposed between the diversion frame 13 and the filter cartridge 10. Both sides of the sealing plate 14 are provided with arc surfaces and are respectively in contact with the diversion frame 13 and the filter cartridge 10. A convex block 19 is fixedly connected to one side of the sealing plate 14. A guide rod 12 is fixedly connected to the side of the diversion frame 13 close to the convex block 19. The guide rod 12 passes through the convex block 19 and is slidably connected thereto. And a stop disc is fixedly connected to the end of the guide rod 12 away from the diversion frame 13. In addition, a first spring 11 is sleeved on the outer side of the guide rod 12. The first spring 11 is located between the convex block 19 and the stop disc, so that the sealing plate 14 and the diversion frame 13 are elastically connected.

[0038] Further, a notch is formed on the side of the diversion frame 13 away from the convex block 19. A baffle 27 is slidably disposed at the notch. The baffle 27 is located on the side of the sealing plate 14 close to the diversion frame 13. The inner side surface of the end of the baffle 27 close to the sealing plate 14 is provided with an inclined surface 28. The outer side surface of the baffle 27 is parallel to the outer side surface of the diversion frame 13. A connecting plate 15 is fixedly connected to the outer side surface of the baffle 27. A connecting block 26 is fixedly disposed on the side of the connecting plate 15 away from the diversion frame 13. A protrusion 23 is fixedly connected to the side of the diversion frame 13 close to the connecting plate 15. A cross bar 24 is fixedly provided on the protrusion 23. The cross bar 24 passes through the connecting block 26 and is slidably connected thereto. In addition, a second spring 25 is sleeved on the outer side of the cross bar 24. The second spring 25 is located between the protrusion 23 and the connecting block 26. And in order to prevent the cross bar 24 from disengaging from the connecting block 26, a retaining ring is fixedly provided at the end of the cross bar 24 away from the protrusion 23.

[0039] The above-mentioned cleaning assembly includes a cleaning plate 18. Specifically, a convex strip 22 is fixedly connected to the inner wall of the filter cartridge 10. The number of the convex strips 22 is set to be multiple and is distributed in an annular array on the inner wall of the filter cartridge 10. And the above-mentioned cleaning plate 18 is hinged to the convex strip 22. In actual use, the convex strip 22 and the cleaning plate 18 can be connected by a hinge or a hinge, so that the cleaning plate 18 can move inward relative to the filter cartridge 10.

[0040] As Figure 9 shown, a sliding rod 31 is fixedly connected to the convex strip 22. And a sleeve rod 30 is fixedly connected to the cleaning plate 18. One end of the sliding rod 31 extends into the sleeve rod 30 and is slidably connected thereto. A third spring 32 is disposed in the sleeve rod 30. Both ends of the third spring 32 are fixedly connected to the sliding rod 31 and the sleeve rod 30 respectively. The sliding rod 31 and the sleeve rod 30 are both provided in an arc shape, and their centers are coincident with the rotation axis of the cleaning plate 18.

[0041] Further, a needle plate 33 is fixedly arranged on the outer side surface of the cleaning plate 18, and a plurality of needles are fixedly arranged on the needle plate 33. The needles can be made of metals such as steel or iron to have certain toughness. When the cleaning plate 18 rotates outwards and fits with the filter cylinder 10, the needles can clean the sand and gravel in the filter holes 17.

[0042] A through groove 16 is formed in the inner bottom surface of the cylinder body 1, so that the sand and gravel entering the cylinder body 1 can be led out through the through groove 16 into the inside of the guide cylinder 29.

[0043] During actual use, the wastewater to be treated is introduced between the cylinder body 1 and the filter cylinder 10 through the water inlet pipe 4. At this time, the sand and gravel will sink to the bottom under the action of its gravity and be led into the inside of the guide cylinder 29 through the through groove 16. At the same time, the filter cylinder 10 is driven to rotate by the sleeve 2, and the filter cylinder 10 can drive the first spiral plate 20 on its outer side to rotate through the vertical shaft 21, which is beneficial to leading the sand and gravel in the guide cylinder 29 into the inside of the material guide cylinder 5. Then, the sand and gravel can be conveyed to a designated position through the second spiral plate 35, while the sewage enters the inside of the filter cylinder 10 through the filter holes 17. In actual application, the top end of the drain pipe 3 is connected to an external water pump to facilitate pumping out the sewage in the filter cylinder 10. In the specific application process, the filter cylinder 10 provided can filter the sand and gravel in the wastewater, so as to achieve a separation effect.

[0044] During the actual filtering process, as the water flows into the filter cartridge 10, sand and gravel will be stuck in the filter holes 17 of the filter cartridge 10. At this time, as the filter cartridge 10 rotates, the sand and gravel stuck in the filter holes 17 will contact the sealing plate 14. When the sand and gravel are stuck in the filter holes 17 and are relatively loose, when the sand and gravel contact the sealing plate 14, the sand and gravel will fall off the filter cartridge 10 through the obstruction of the sealing plate 14. When the sand and gravel are stuck in the filter holes 17 and are relatively firm, when the filter cartridge 10 rotates so that the stones in the filter holes 17 contact the sealing plate 14, as the filter cartridge 10 rotates, the stones in the filter holes 17 will drive the sealing plate 14 to rotate relative to the guide frame 13. When the sealing plate 14 is staggered with the baffle 27, the baffle 27 can be driven to move toward the direction of the filter cartridge 10 and fit with the filter cartridge 10 under the action of the second spring 25. When the baffle 27 is in contact with the filter When the filter cartridge 10 is fitted, it is possible to prevent external sewage from entering the guide frame 13 through the notch. As the sealing plate 14 moves, the end of the guide frame 13 close to the filter cartridge 10 is gradually opened, so that the sewage inside the filter cartridge 10 can flow into the guide frame 13 through the filter hole 17. As the sewage flows from the filter cartridge 10 to the guide frame 13, the cleaning plate 18 can be driven to rotate outward and gradually fit with the filter cartridge 10. The third spring 32 is provided to assist in driving the cleaning plate 18 to rotate outward. When the cleaning plate 18 rotates outward and fits with the filter cartridge 10, the pins on the outer side of the pin plate 33 are inserted into the filter hole 17, which is conducive to cleaning the sand and gravel stuck in the filter hole 17. When the stone is cleaned off the filter cartridge 10, the sealing plate 14 can be driven to reset under the action of the first spring 11, so as to facilitate the next use.

[0045] By providing a slope 28 on the baffle 27, when the stones in the filter hole 17 are cleaned, the sealing plate 14 will be reset to the initial state. During the reset process, the sealing plate 14 will contact the slope 28 on the baffle 27, thereby driving the baffle 27 to move downward into the groove and reset for the next use.

[0046] To summarize, this device cooperates with the sealing component and the cleaning component through the arrangement. When the stone stuck on the filter hole 17 fits with the sealing plate 14, the rotation of the filter cartridge 10 can cause the sealing plate 14 to rotate relative to the filter cartridge 10, so that the sewage in the filter cartridge 10 can flow from the filter cartridge 10 to the inside of the guide frame 13. Driven by the water flow and the elastic force of the third spring 32, the cleaning plate 18 can be driven to rotate outward. When the needle plate 33 fits with the filter cartridge 10, the stone in the filter hole 17 can be cleaned by inserting the needle to avoid damage to the stone and the filter cartridge 10, which is beneficial to protect the filter cartridge 10 and extend its service life.

[0047] like Figures 1-2As shown, in order to drive the filter cartridge 10 to rotate, a driven gear 7 is fixedly sleeved on the outer side of the sleeve 2, and a driving gear 6 is meshed with the outer side of the driven gear 7. The top of the cylinder body 1 is provided with a second motor through a fixing plate, and the output shaft of the second motor is connected to the driving gear 6, so as to drive the sleeve 2 and the filter cartridge 10 to rotate by means of this gear transmission method.

[0048] A plurality of support legs are fixedly connected to the bottom of the flow guide cylinder 29, and a base is fixedly arranged on the outer side of the material guide cylinder 5.

[0049] The above-mentioned drain pipe 3 passes through the filter cartridge 10 and is rotatably connected thereto.

[0050] A flow guide pipe 34 is fixedly installed at the bottom end of the flow guide cylinder 29, and the top end of the flow guide pipe 34 extends into the flow guide frame 13 and is communicated with the flow guide frame 13, so that the sewage entering the flow guide frame 13 can be discharged through the flow guide pipe 34. In actual use, a valve can be installed at the end of the flow guide pipe 34 far away from the cylinder body 1.

Claims

1. A sand-water separation device, comprising a cylinder body and a filter cylinder rotatably arranged inside the cylinder body. A through groove is formed on the inner bottom surface of the cylinder body. An inlet pipe is fixedly installed on the outer side of the cylinder body, and the inlet pipe is communicated with the cylinder body. A drain pipe is arranged inside the filter cylinder, the bottom end of the drain pipe extends into the filter cylinder, and the top end of the drain pipe extends to the outside of the cylinder body. It is characterized in that: A flow guiding frame is arranged between the cylinder body and the filter cartridge. The flow guiding frame is fixedly connected to the cylinder body, and a sealing assembly is arranged on one side of the flow guiding frame close to the filter cartridge. A plurality of cleaning assemblies are uniformly arranged inside the filter cartridge, and the cleaning assemblies are hinged to the filter cartridge; When the filter cartridge drives the sealing assembly to rotate relative to the flow guiding frame, the sewage in the filter cartridge moves towards the flow guiding frame and drives the cleaning assemblies to rotate towards the filter cartridge, thereby cleaning the filter holes on the filter cartridge; A plurality of through filter holes are uniformly formed on the outer circumferential surface of the filter cartridge. A material guiding cylinder is arranged below the cylinder body. A funnel-shaped flow guiding cylinder is fixedly connected below the cylinder body. A connecting pipe is fixedly arranged between the flow guiding cylinder and the material guiding cylinder. A sleeve is fixedly connected to the top end surface of the filter cartridge. The sleeve penetrates through the cylinder body and is rotatably connected to the cylinder body. A vertical shaft is fixedly connected to the bottom end surface of the filter cartridge. The vertical shaft penetrates downwards through the cylinder body and extends into the flow guiding cylinder. A first spiral plate is fixedly arranged on the outer side of the vertical shaft. The first spiral plate is located at the bottom end inside the flow guiding cylinder; The sealing assembly includes a sealing plate arranged between the flow guiding frame and the filter cartridge. The sealing plate is elastically connected to the flow guiding frame. Both sides of the sealing plate are arc-shaped and are respectively in contact with the flow guiding frame and the filter cartridge. A notch is formed on one side of the flow guiding frame. A baffle is slidably arranged at the notch, and the baffle is elastically connected to the flow guiding frame. The baffle is located on one side of the sealing plate close to the flow guiding frame. The inner side surface of one end of the baffle close to the sealing plate is beveled; The cleaning assembly includes a cleaning plate. A plurality of convex strips are fixedly connected to the inner wall of the filter cartridge. The cleaning plate is hinged to the convex strips. A sliding rod is fixedly connected to the convex strip. A sleeve rod is fixedly connected to the cleaning plate. One end of the sliding rod extends into the sleeve rod and is slidably connected to the sleeve rod. A third spring is arranged inside the sleeve rod. A needle plate is fixedly arranged on the outer side surface of the cleaning plate. A plurality of pins are fixedly arranged on the needle plate.

2. The sand-water separation device according to claim 1, characterized in that: A driven gear is fixedly sleeved on the outer side of the sleeve. A driving gear is meshed with the outer side of the driven gear.

3. The sand-water separation device according to claim 2, characterized in that: A flow guiding pipe is fixedly installed at the bottom end of the flow guiding cylinder. The top end of the flow guiding pipe extends into the flow guiding frame and is communicated with the flow guiding frame.

4. A sand-water separation device according to claim 1, characterized in that: A connecting shaft is rotatably arranged inside the material guiding cylinder. A second spiral plate is fixedly arranged on the outer side of the connecting shaft.

5. The sand-water separation device according to claim 1, characterized in that: A convex block is fixedly connected to one side of the sealing plate. A guiding rod is fixedly connected to one side of the flow guiding frame close to the convex block. The guiding rod penetrates through the convex block and is slidably connected to the convex block. A stop disk is fixedly connected to the end of the guiding rod far from the flow guiding frame. A first spring is sleeved on the outer side of the guiding rod. The first spring is located between the convex block and the stop disk.

6. The sand-water separation device according to claim 1, characterized in that: A connecting plate is fixedly connected to the outer side surface of the baffle. A connecting block is fixedly arranged on the side of the connecting plate far from the flow guiding frame. A protrusion is fixedly connected to one side of the flow guiding frame close to the connecting plate. A cross bar is fixedly arranged on the protrusion. The cross bar penetrates through the connecting block and is slidably connected to the connecting block. A second spring is sleeved on the outer side of the cross bar. The second spring is located between the protrusion and the connecting block.

7. A method for separating sand and water using the sand-water separation device described in claim 4 above, characterized in that, It includes the following steps: S1. The wastewater to be treated is introduced into the space between the cylinder and the filter cartridge through the water inlet pipe. The sand and gravel will sink to the bottom under the action of gravity. The filter cartridge drives the first spiral plate on the outside to rotate through the vertical axis, and the sand and gravel in the guide cylinder is introduced into the guide cylinder. Then, the sand and gravel can be transported to the designated position through the second spiral plate. S2. When the stuck stone contacts the sealing plate, as the filter cartridge rotates, the stone will drive the sealing plate to rotate relative to the guide frame. When the sealing plate and the baffle are offset, the cleaning plate gradually fits the filter cartridge as the sewage flows. In this process, the stuck sand and gravel can be cleaned through the needle plate.

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