A plug-in wall filter for groundwater recharge wells

Abstract

The present invention discloses a plug-in wall filter for a groundwater recharge well, which relates to the field of groundwater engineering technology. It includes a filtering mechanism for filtering groundwater in the recharge well, and the filtering mechanism includes a primary filter screen, a secondary filter screen, a tertiary filter screen and a quaternary filter screen, and the primary filter screen, the secondary filter screen, the tertiary filter screen and the quaternary filter screen are arranged step by step. It also includes a fixing mechanism for placing the filtering mechanism, and the fixing mechanism includes a top cover, which is movably arranged on the outside of the primary filter screen, and both sides of the top of the top cover are fixedly connected to limiting plates, and limiting grooves are provided in the two limiting plates. The present invention facilitates the disassembly, replacement or cleaning of all filter screens through the cooperation of the limiting collar, the clamping plate, the first groove plate, the second groove plate and the limiting plate. The replacement is fast and convenient, which saves a lot of time for cleaning or replacing the filter screen, and can also avoid the swinging phenomenon of the arc filter plate, thereby improving the stability of the arc filter plate.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater engineering, and in particular to a plug-in wall filter for a groundwater recharge well. Background Art

[0002] In recent years, with the development of the social economy and the improvement of public environmental awareness, the attention paid to groundwater environment by all sectors of society has also increased. In the field of engineering construction, to ensure the stability of underground projects or foundation pit excavation sites, methods such as well point drainage are often used to lower the groundwater level. At the same time, to reduce the formation subsidence caused by the water level drop or to protect groundwater resources, recharge wells are often set up to continuously inject the extracted groundwater into underground aquifers outside the affected area. In the field of groundwater treatment, extraction-recharge treatment technology is a widely used classic method that can effectively remove light non-aqueous phase liquids from organic pollutants. This technology extracts contaminated water through a well group for treatment and recharges it into the formation after the water quality meets the standard. It is used to flush the aquifer, dilute the contaminated water, and accelerate the circulation of groundwater, thereby shortening the groundwater restoration time.

[0003] In pumping and recharging wells, filters are a key component connecting the well structure to the aquifer and filtering groundwater. Currently, filtration systems for both pumping and recharging wells utilize an external filtration structure. Depending on the nature of the aquifer, filters are categorized as skeleton filters, wire-wrapped filters, mesh filters, or gravel-filled filters. These filters are installed directly outside the well casing before well completion or as gravel-filled filters after completion.

[0004] Extensive engineering experience with groundwater pumping and recharge wells demonstrates that prolonged periods of relatively high recharge flow rates can easily lead to varying degrees of well blockage. Well blockage is particularly common in recharge wells. Even after groundwater is treated to meet recharge standards, the recharge flow rate can still decrease over time. Well blockage primarily results from localized clogging of filters under the influence of high flow rates, and the filters are difficult to clean, remove, or replace after installation.

[0005] In view of the above problems, a plug-in wall filter for groundwater recharge wells is proposed. Summary of the Invention

[0006] The object of the present invention is to provide a plug-in wall filter for a groundwater recharge well to solve the above-mentioned problem.

[0007] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0008] A plug-in wall filter for a groundwater recharge well, comprising a filtering mechanism for filtering groundwater in the recharge well, the filtering mechanism comprising a primary filter screen, a secondary filter screen, a tertiary filter screen and a quaternary filter screen, and the primary filter screen, the secondary filter screen, the tertiary filter screen and the quaternary filter screen are arranged step by step, and further comprising a fixing mechanism for placing the filtering mechanism, the fixing mechanism comprising a top cover, the top cover being movably sleeved on the outside of the primary filter screen, both sides of the top of the top cover being fixedly connected to limit plates, and limit grooves being provided in both limit plates The first-stage filter screen and the second-stage filter screen are respectively fixedly connected with two first groove plates and two second groove plates on both sides of the top, the two first groove plates are respectively adapted to the two limit grooves, and the two second groove plates are respectively adapted to the two first groove plates. The top of the third-stage filter screen is fixedly connected with a clamping plate on both sides, and the two clamping plates are respectively adapted to the two second groove plates. The top of the fourth-stage filter screen is fixedly connected with a limiting ring, the limiting ring is located above the third-stage filter screen, and the outer diameter of the limiting ring is equal to the outer diameter of the third-stage filter screen.

[0009] As a preferred solution of the present invention, the fixing mechanism also includes a hopper, two arc-shaped fixing plates, two expansion assemblies for supporting the two arc-shaped fixing plates, and an air supply assembly for transporting gas to the interior of the two expansion assemblies. The hopper is sleeved on the outside of the first-level filter and is located directly below the top cover. The two arc-shaped fixing plates are symmetrically arranged between the top cover and the hopper, and the two ends of the two arc-shaped fixing plates are respectively fixedly connected to the top cover and the hopper. The two expansion assemblies are respectively installed on the outer walls of the two arc-shaped fixing plates. The air supply assembly is installed between the top cover and the first-level filter and is fixedly connected to the inner wall of the top cover.

[0010] As a preferred solution of the present invention, the expansion assembly includes an arc-shaped resistance plate and an airbag bag, the arc-shaped resistance plate is arranged on the outside of the arc-shaped fixed plate, the airbag bag is located between the arc-shaped resistance plate and the arc-shaped fixed plate, and the two sides of the airbag bag are respectively fixedly connected to the arc-shaped resistance plate and the arc-shaped fixed plate.

[0011] As a preferred solution of the present invention, the air supply assembly includes a semi-arc air guide pipe, a turning pipe and two air intake pipes. The semi-arc air guide pipe is fixedly arranged inside the top cover, and the semi-arc air guide pipe is located between the top cover and the first-level filter. The turning pipe is connected to the top of the semi-arc air guide pipe, and a control valve is installed on the turning pipe. The two air intake pipes are respectively connected to the two ends of the semi-arc air guide pipe, and the two air intake pipes respectively pass through two arc-shaped fixing plates and extend to the inside of the two airbags.

[0012] As a preferred solution of the present invention, the bottoms of the primary filter, the secondary filter and the tertiary filter are all fixedly connected with coaxial sediment collectors, all of the sediment collectors are funnel-shaped, and the bottoms of all the sediment collectors are in contact with each other in sequence.

[0013] As a preferred solution of the present invention, the bottom end of the sediment collector located at the bottom of the first-level filter is fixedly connected to a sediment basin, the bottom of the sediment basin is closed, and the interior of the sediment basin is axially sealed and slidably connected with a movable plate, and the middle position of the bottom end of the movable plate is fixedly connected to a push rod, and the middle position of the bottom end of the sediment basin is provided with a through hole for the push rod to pass through, and the push rod slides axially and sealed with the through hole, and a spring is movably sleeved on the outside of the push rod, and the upper and lower ends of the spring respectively contact the movable plate and the inner bottom wall of the sediment basin, and the bottom of the push rod is threadedly connected to a limiting cover.

[0014] As a preferred solution of the present invention, the outer wall of the mud and sand basin is connected to a drainage pipe located below the movable plate, and a one-way valve is provided inside the drainage pipe.

[0015] As a preferred solution of the present invention, the bottom of the hopper is funnel-shaped, and the bottom end of the sediment collector at the bottom of the first-stage filter screen conflicts with the bottom of the hopper.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention has a good filtering effect through the cooperation of the first-level filter screen, the second-level filter screen, the third-level filter screen and the fourth-level filter screen. Through the cooperation of the limiting collar, the clamping plate, the first groove plate, the second groove plate and the limiting plate, it is convenient to disassemble, replace or clean all the filter screens. The replacement is fast and convenient, which saves a lot of time for cleaning or replacing the filter screen. It can also avoid the swinging phenomenon of the curved filter plate, improve the stability of the curved filter plate, and prevent large movement or deformation between different filter screens during pumping or recharging operations, so as to avoid affecting the operation.

[0018] 2. The present invention conveys gas into the airbag bag through the cooperation of the inflation component and the expansion component, causing the airbag bag to gradually expand, thereby pushing the arc-shaped contact plate fixed to it to contact the wall of the recharge well. The two airbag bags can expand evenly to increase the supporting force, effectively straightening the fixing mechanism, which not only improves the centering of the top cover, but also effectively improves the stability of the fixing mechanism, thereby stably supporting the fixing mechanism in the recharge well. The overall construction is simple and convenient, avoiding shaking or displacement of the fixing mechanism and the filtering mechanism inside it during pumping or recharge operations.

[0019] 3. Through the arrangement of the push rod, movable plate and drain pipe, when the movable plate moves down to the bottom of the drain pipe, the sediment on the movable plate is discharged along with the water flow, thereby improving the cleaning efficiency. In addition, by pulling the push rod, the movable plate can be moved up and down in the mud and sand basin, thereby scraping off the stains remaining on the inner wall of the mud and sand basin and rinsing it clean to keep the inside of the mud and sand basin clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0021] Figure 1 The present invention provides a schematic diagram of the overall structure of a plug-in wall filter for a groundwater recharge well;

[0022] Figure 2 The present invention provides a partial structural diagram of a plug-in wall filter for a groundwater recharge well;

[0023] Figure 3 The present invention provides a front structural cross-sectional view of a plug-in wall filter for a groundwater recharge well;

[0024] Figure 4 The present invention provides a top-sectional view of a plug-in wall filter for a groundwater recharge well.

[0025] The numbers in the figure represent the following:

[0026] 1. Filter mechanism; 11. First-stage filter screen; 111. Mud and sand basin; 112. Movable plate; 113. Push rod; 114. Through hole; 115. Spring; 116. Limit cover; 117. Drain pipe; 12. Second-stage filter screen; 13. Third-stage filter screen; 14. Fourth-stage filter screen; 15. Sediment collector; 2. Fixing mechanism; 21. Top cover; 22. Limit plate; 23. Limit groove; 24. First groove plate; 25. Second groove plate; 26. Clamping plate; 27. Limit collar; 3. Hopper; 4. Arc-shaped fixing plate; 5. Expansion assembly; 51. Arc-shaped resistance plate; 52. Air bag; 6. Air supply assembly; 61. Semi-arc-shaped air guide pipe; 62. Turning pipe; 63. Inlet pipe. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1 - Figure 4As shown, the present invention provides a plug-in wall filter for a groundwater recharge well, comprising a filter mechanism 1 for filtering groundwater in the recharge well, the filter mechanism 1 comprising a primary filter screen 11, a secondary filter screen 12, a tertiary filter screen 13 and a quaternary filter screen 14, and the primary filter screen 11, the secondary filter screen 12, the tertiary filter screen 13 and the quaternary filter screen 14 are arranged step by step, and further comprising a fixing mechanism 2 for placing the filter mechanism 1, the fixing mechanism 2 comprising a top cover 21, the top cover 21 being movably sleeved on the outside of the primary filter screen 11, both sides of the top of the top cover 21 being fixedly connected to a limiting plate 22, and both limiting plates 22 are provided with a limiting opening. The first filter screen 11 and the second filter screen 12 are fixedly connected to the top of the two first groove plates 24 and the two second groove plates 25 respectively. The two first groove plates 24 are respectively adapted to the two limiting grooves 23, and the two second groove plates 25 are respectively adapted to the two first groove plates 24. The top of the third filter screen 13 is fixedly connected with a clamping plate 26 on both sides, and the two clamping plates 26 are respectively adapted to the two second groove plates 25. The top of the fourth filter screen 14 is fixedly connected with a limiting collar 27, which is located above the third filter screen 13, and the outer diameter of the limiting collar 27 is equal to the outer diameter of the third filter screen 13.

[0029] When the present invention is in use, the filter mechanism 1 is first placed inside the fixing mechanism 2, and the filter mechanism 1 is supported by the fixing mechanism 2. When placing the filter mechanism 1, the first-level filter screen 11, the second-level filter screen 12, the third-level filter screen 13 and the fourth-level filter screen 14 are arranged one by one inside the top cover 21. When placing, first the first-level filter screen 11 is placed inside the top cover 21, and the first groove plates 24 on both sides of the first-level filter screen 11 are placed correspondingly inside the two limiting grooves 23. Then, the second-level filter screen 12 is placed inside the first-level filter screen 11, and the two second groove plates 25 on both sides of its top are placed correspondingly inside the two first groove plates 24 on both sides of the first-level filter screen 11. The third-level filter screen 13 is placed inside the second-level filter screen 12, and the two clamping plates 26 on both sides of its top are placed correspondingly in the two second groove plates 25. Finally, the fourth-level filter screen 14 is inserted into the third-level filter screen 13 until the limiting collar 27 on the top of the fourth-level filter screen 14 contacts the top of the third-level filter screen 13. Then the entire fixing mechanism 2 is inserted into the recharge well. , until the top cover 21 hits the top of the recharge well. When siltation occurs after running for a period of time, the blocked fourth-stage filter 14 can be lifted out separately or the fourth-stage filter 14, the third-stage filter 13, and the second-stage filter 12 can be lifted out step by step, or the first-stage filter 11, the second-stage filter 12, the third-stage filter 13 and the fourth-stage filter 14 can be lifted out together. It can be selected according to the actual situation and after flushing, it can be put back into the well for continued use, so that all filters can be disassembled, replaced or cleaned. The replacement is fast and convenient, which is convenient for cleaning. Or replacing the filter can save a lot of time, and through the cooperation of the first-level filter 11, the second-level filter 12, the third-level filter 13 and the fourth-level filter 14, it has a better filtering effect. Through the cooperation of the limiting ring 27, the card plate 26, the first groove plate 24, the second groove plate 25 and the limiting plate 22, the swinging phenomenon of the arc filter plate can be avoided, the stability of the arc filter plate is improved, and large movement or deformation between different filter screens during pumping or recharging operations can be prevented to avoid affecting the operation.

[0030] Among them, in order to prevent the first-level filter screen 11, the second-level filter screen 12, the third-level filter screen 13 and the fourth-level filter screen 14 from moving upward after being placed, they can be fixed by bolts or the limiting collar 27, the clamping plate 26, the first groove plate 24, the second groove plate 25 and the limiting plate 22 can be set as magnetic plates to be adsorbed and fixed, so as to further improve the stability of the filtering mechanism 1. The settings of the above-mentioned bolts or magnetic plates are all existing technologies.

[0031] The fixing mechanism 2 also includes a hopper 3, two arc-shaped fixing plates 4, two expansion assemblies 5 for supporting the two arc-shaped fixing plates 4, and an air supply assembly 6 for conveying gas to the interior of the two expansion assemblies 5. The hopper 3 is sleeved on the outside of the primary filter 11 and is located directly below the top cover 21. The two arc-shaped fixing plates 4 are symmetrically arranged between the top cover 21 and the hopper 3, and both ends of the two arc-shaped fixing plates 4 are fixedly connected to the top cover 21 and the hopper 3, respectively. The two expansion assemblies 5 are respectively installed on the outer walls of the two arc-shaped fixing plates 4. The air supply assembly 6 is installed between the top cover 21 and the primary filter 11 and is fixedly connected to the inner wall of the top cover 21. By setting the hopper 3 and the two arc-shaped fixing plates 4, the primary filter 11 can be protected and limited to prevent the primary filter 11 from colliding with the wall of the recharge well when placing or removing the primary filter 11, causing the primary filter 11 to deform or the wall of the recharge well to collapse.

[0032] Furthermore, the expansion assembly 5 includes an arc-shaped resistance plate 51 and an airbag bag 52. The arc-shaped resistance plate 51 is arranged on the outside of the arc-shaped fixing plate 4. The airbag bag 52 is located between the arc-shaped resistance plate 51 and the arc-shaped fixing plate 4. The two sides of the airbag bag 52 are respectively fixedly connected to the arc-shaped resistance plate 51 and the arc-shaped fixing plate 4.

[0033] The air supply assembly 6 includes a semi-arc air guide pipe 61, a turning pipe 62 and two air intake pipes 63. The semi-arc air guide pipe 61 is fixedly arranged inside the top cover 21, and the semi-arc air guide pipe 61 is located between the top cover 21 and the first-level filter 11. The turning pipe 62 is connected to the top of the semi-arc air guide pipe 61, and a control valve is installed on the turning pipe 62. The two air intake pipes 63 are respectively connected to the two ends of the semi-arc air guide pipe 61, and the two air intake pipes 63 respectively pass through the two arc-shaped fixing plates 4 and extend to the inside of the two airbag bags 52.

[0034] When the fixing mechanism 2 is placed in the recharging well, the turning pipe 62 is connected to an external air pump or a push-type inflator and the like, and then the control valve is opened to allow the external air pump or the push-type inflator to pump external gas into the turning pipe 62 and the semi-arc-shaped air guide pipe 61, and the gas is respectively transported to the two air bags 52 through the two air inlet pipes 63. When the gas inside the air bags 52 is filled, the air bags 52 gradually expand, thereby pushing the arc-shaped contact plate 51 fixed thereto to move closer to the wall of the recharging well until it completely contacts the wall of the recharging well. The two air bags 52 can expand evenly to increase the supporting force and effectively straighten the fixing mechanism 2, which not only improves the centering degree of the top cover 21, but also effectively improves the stability of the fixing mechanism 2, thereby stably supporting the fixing mechanism 2 in the recharging well. The overall construction is simple and convenient, which avoids shaking or displacement of the fixing mechanism 2 and the filtering mechanism 1 inside it during pumping or recharging operations.

[0035] The bottoms of the primary filter screen 11 , the secondary filter screen 12 and the tertiary filter screen 13 are all fixedly connected with coaxial sediment collectors 15 . All sediment collectors 15 are funnel-shaped, and the bottoms of all sediment collectors 15 are in contact with each other in sequence.

[0036] The bottom of the hopper 3 is funnel-shaped, and the bottom end of the sedimentation device 15 at the bottom of the first-stage filter 11 conflicts with the bottom of the hopper 3 .

[0037] Through the interference cooperation of all the sediment collectors 15, a gap for accommodating filter residue and sediment can be formed between two adjacent filter screens, thereby improving the filtering effect. The inner wall of the hopper 3 and the bottom end of the sediment collector 15 at the bottom of the first-level filter screen 11 interfere with each other and can limit the position of the first-level filter screen 11.

[0038] The bottom end of the sediment collector 15 located at the bottom of the first-stage filter 11 is fixedly connected to a sediment basin 111, the bottom of the sediment basin 111 is closed, and the interior of the sediment basin 111 is axially sealed and slidably connected to a movable plate 112, and the middle position of the bottom end of the movable plate 112 is fixedly connected to a push rod 113, and the middle position of the bottom end of the sediment basin 111 is provided with a through hole 114 for the push rod 113 to pass through, and the push rod 113 and the through hole 114 are axially sealed and slidably, and a spring 115 is movably sleeved on the outside of the push rod 113, and the upper and lower ends of the spring 115 respectively conflict with the movable plate 112 and the inner bottom wall of the sediment basin 111, and the bottom of the push rod 113 is threadedly connected to a limit cover 116.

[0039] The outer wall of the sediment basin 111 is connected to a drainage pipe 117 located below the movable plate 112 , and a one-way valve is provided inside the drainage pipe 117 .

[0040] When the fixing mechanism 2 and the filtering mechanism 1 inside it are placed in the recharging well, the water inside the recharging well enters the filtering mechanism 1 from the gap between the two arc-shaped fixing plates 4, and the water flows through the first-level filter screen 11, the second-level filter screen 12, the third-level filter screen 13 and the fourth-level filter screen 14 in sequence to complete the filtration, playing the role of multi-stage filtration, thereby improving the filtration effect of the filter screen. Since the movable plate 112 is axially sealed with the inner wall of the sediment basin 111, when the water pressure is low, the movable plate 112 remains in the initial position, and the sediment inside the fourth-level filter screen 14 is The sediment accumulated on the top of the movable plate 112 can be moved down when the water pressure is large, or the movable plate 112 can be moved up and down by manually pulling the push rod 113. When the movable plate 112 moves down to the bottom of the drain pipe 117, the sediment on the movable plate 112 is discharged together with the water flow, thereby improving the cleaning efficiency. In addition, by pulling the push rod 113, the movable plate 112 can be moved up and down in the mud and sand basin 111, so that the stains remaining on the inner wall of the mud and sand basin 111 can be scraped off and rinsed clean, keeping the inside of the mud and sand basin 111 clean.

[0041] The scope of protection of the application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A plug-in wall filter for a groundwater recharge well, comprising a filter mechanism (1) for filtering groundwater in a recharge well, wherein the filter mechanism (1) comprises a primary filter screen (11), a secondary filter screen (12), a tertiary filter screen (13) and a quaternary filter screen (14), and the primary filter screen (11), the secondary filter screen (12), the tertiary filter screen (13) and the quaternary filter screen (14) are arranged in a step-by-step manner, characterized in that: The filter mechanism (1) further comprises a fixing mechanism (2) for placing the filter mechanism (1), the fixing mechanism (2) comprising a top cover (21), the top cover (21) being movably sleeved on the outside of the primary filter screen (11), the top of the top cover (21) being fixedly connected to limiting plates (22) on both sides, the two limiting plates (22) being provided with limiting grooves (23), the tops of the primary filter screen (11) and the secondary filter screen (12) being fixedly connected to two first groove plates (24) and two second groove plates (25), the two first groove plates ( 24) are respectively adapted to the two limiting grooves (23), the two second groove plates (25) are respectively adapted to the two first groove plates (24), the top of the three-stage filter screen (13) is fixedly connected with a clamping plate (26) on both sides, the two clamping plates (26) are respectively adapted to the two second groove plates (25), the top of the four-stage filter screen (14) is fixedly connected with a limiting collar (27), the limiting collar (27) is located above the three-stage filter screen (13), and the outer diameter of the limiting collar (27) is equal to the outer diameter of the three-stage filter screen (13); The fixing mechanism (2) further comprises a hopper (3), two arc-shaped fixing plates (4), two expansion assemblies (5) for supporting the two arc-shaped fixing plates (4), and an air supply assembly (6) for conveying gas into the two expansion assemblies (5). The hopper (3) is sleeved outside the primary filter (11) and is located directly below the top cover (21). The two arc-shaped fixing plates (4) are symmetrically arranged between the top cover (21) and the hopper (3), and both ends of the two arc-shaped fixing plates (4) are respectively fixedly connected to the top cover (21) and the hopper (3). The two expansion assemblies (5) are respectively mounted on the outer walls of the two arc-shaped fixing plates (4). The air supply assembly (6) is mounted between the top cover (21) and the primary filter (11), and is fixedly connected to the inner wall of the top cover (21).

2. The plug-in wall filter for groundwater recharge well according to claim 1, characterized in that: The expansion assembly (5) comprises an arc-shaped contact plate (51) and an airbag bag (52), wherein the arc-shaped contact plate (51) is arranged outside the arc-shaped fixing plate (4), and the airbag bag (52) is located between the arc-shaped contact plate (51) and the arc-shaped fixing plate (4), and both sides of the airbag bag (52) are fixedly connected to the arc-shaped contact plate (51) and the arc-shaped fixing plate (4), respectively.

3. The plug-in wall filter for groundwater recharge well according to claim 2, characterized in that: The air supply assembly (6) comprises a semi-arc-shaped air guide pipe (61), a turning pipe (62) and two air intake pipes (63). The semi-arc-shaped air guide pipe (61) is fixedly arranged inside the top cover (21), and the semi-arc-shaped air guide pipe (61) is located between the top cover (21) and the first-level filter (11). The turning pipe (62) is connected to the top of the semi-arc-shaped air guide pipe (61), and a control valve is installed on the turning pipe (62). The two air intake pipes (63) are respectively connected to the two ends of the semi-arc-shaped air guide pipe (61), and the two air intake pipes (63) respectively penetrate the two arc-shaped fixing plates (4) and extend to the inside of the two airbag bags (52).

4. The plug-in wall filter for groundwater recharge well according to claim 1, characterized in that: The bottoms of the primary filter screen (11), the secondary filter screen (12) and the tertiary filter screen (13) are all fixedly connected with a sediment collector (15) coaxial therewith. All the sediment collectors (15) are funnel-shaped, and the bottoms of all the sediment collectors (15) are in contact with each other in sequence.

5. The plug-in wall filter for groundwater recharge well according to claim 1, characterized in that: The bottom end of the sediment collector (15) located at the bottom of the first-stage filter (11) is fixedly connected to a sediment basin (111), the bottom of the sediment basin (111) is closed, the interior of the sediment basin (111) is axially sealed and slidably connected to a movable plate (112), the middle portion of the bottom end of the movable plate (112) is fixedly connected to a push rod (113), the middle portion of the bottom end of the sediment basin (111) is provided with a through hole (114) for the push rod (113) to pass through, the push rod (113) and the through hole (114) are axially sealed and slidably connected, the outside of the push rod (113) is movably sleeved with a spring (115), the upper and lower ends of the spring (115) respectively contact the movable plate (112) and the inner bottom wall of the sediment basin (111), and the bottom of the push rod (113) is threadedly connected to a limit cover (116).

6. The plug-in wall filter for groundwater recharge well according to claim 5, characterized in that: The outer wall of the sediment basin (111) is connected to a drainage pipe (117) located below the movable plate (112), and a one-way valve is provided inside the drainage pipe (117).

7. The plug-in wall filter for groundwater recharge well according to claim 1, characterized in that: The bottom of the hopper (3) is funnel-shaped, and the bottom end of the sediment collector (15) at the bottom of the first-stage filter (11) abuts against the bottom of the hopper (3).

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