Pluggable in-wall filter for underground water recharge well

Abstract

The invention discloses an underground water recharge well plug-pull type in-wall filter, and relates to the technical field of underground water engineering, the underground water recharge well plug-pull type in-wall filter comprises a filter mechanism used for filtering underground water in a recharge well, and the filter mechanism comprises a first-stage filter screen, a second-stage filter screen, a third-stage filter screen and a fourth-stage filter screen; the first-stage filter screen, the second-stage filter screen, the third-stage filter screen and the fourth-stage filter screen are arranged in a sleeved mode step by step, the fixing mechanism is used for containing the filtering mechanism and comprises a top cover, the top cover movably sleeves the first-stage filter screen, limiting plates are fixedly connected to the two sides of the top of the top cover, and limiting grooves are formed in the two limiting plates; through cooperation of the limiting lantern ring, the clamping plate, the first groove plate, the second groove plate and the limiting plate, all the filter screens are convenient to disassemble, replace or clean, replacement is rapid and convenient, a large amount of time is saved for cleaning or replacing the filter screens, the phenomenon that the arc-shaped filter plate swings can be avoided, and the stability of the arc-shaped filter plate is improved.

Description

Technical Field

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

[0002] In recent years, with the development of social economy and the improvement of public environmental awareness, the attention paid by all sectors to the groundwater environment has also increased. In the field of engineering construction, in order to ensure the stability of underground projects or foundation pit excavation sites, well point drainage and other methods are often used to lower the groundwater level. At the same time, in order to reduce the formation settlement caused by the water level drop or protect groundwater resources, recharge wells are often set up to continuously inject the pumped groundwater into the underground aquifer outside the impact range; in the field of groundwater treatment, extraction-recharge treatment technology is a commonly used classic method that can effectively remove light non-aqueous phase liquids in 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, so as to flush the aquifer, dilute the contaminated water, and accelerate the circulation of groundwater, thereby shortening the restoration time of groundwater.

[0003] In pumping wells and recharging wells, filters are key components that connect the well structure with the aquifer and filter groundwater. At present, the filtration devices of pumping wells and recharging wells all use a filtration structure outside the well wall. According to the properties of different aquifers, the types of filters are divided into skeleton filters, wire wrapped filters, mesh filters or gravel-filled filters. This type of filter is a filtration system that is directly set on the outside of the well pipe before well construction or filled with gravel around the well after well construction.

[0004] A large amount of engineering experience in groundwater pumping and recharging wells shows that when the recharging flow rate is at a relatively high level for a long time, it is very easy to cause varying degrees of well blockage. Well blockage is most common in recharging wells. Even if the groundwater is treated to meet the standards and then recharged, the recharge flow rate is still prone to gradually decrease as the operation continues. Well blockage is mainly caused by the local blockage of the filter under the influence of a large flow rate, and the filter is not easy to clean and disassemble and 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 type in-wall filter for a groundwater recharging 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: 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 sleeved step by step, and also comprising a fixing mechanism for placing the filtering mechanism, the fixing mechanism comprising a top cover, the top cover is movably sleeved outside the primary filter screen, both sides of the top of the top cover are fixedly connected to limit plates, and limit grooves are provided in the two 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 matched with the two limit grooves, and the two second groove plates are respectively matched with the two first groove plates. The third-stage filter screen is fixedly connected with card plates on both sides of the top, and the two card plates are respectively matched with the two second groove plates. The fourth-stage filter screen is fixedly connected with a limiting ring on the top, 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.

[0008] 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 conveying gas to the interior of the two expansion assemblies. The hopper is sleeved on the outside of the primary 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, and the air supply assembly is installed between the top cover and the primary filter and is fixedly connected to the inner wall of the top cover.

[0009] As a preferred solution of the present invention, the expansion assembly includes an arc-shaped contact plate and an airbag bag, the arc-shaped contact plate is arranged on the outside of the arc-shaped fixing plate, the airbag bag is located between the arc-shaped contact plate and the arc-shaped fixing plate, and the two sides of the airbag bag are respectively fixedly connected to the arc-shaped contact plate and the arc-shaped fixing plate.

[0010] As a preferred solution of the present invention, the air supply assembly includes a semi-arc air duct, a turning pipe and two air intake pipes, the semi-arc air duct is fixedly arranged inside the top cover, and the semi-arc air duct is located between the top cover and the primary filter, the turning pipe is connected to the top of the semi-arc air duct, 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 duct, and the two air intake pipes respectively pass through two arc-shaped fixing plates and extend to the inside of the two airbags.

[0011] 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 of the sediment collectors are in contact with each other in sequence.

[0012] 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 a movable plate is axially sealed and slidably connected inside the sediment basin. A push rod is fixedly connected to the middle position of the bottom end of the movable plate, and a through hole for the push rod to pass through is opened in the middle position of the bottom end of the sediment basin. The push rod slides axially and seals with the through hole, and a spring is movably sleeved on the outside of the push rod. 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.

[0013] 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 arranged inside the drainage pipe.

[0014] As a preferred solution of the present invention, the bottom of the hopper is funnel-shaped, and the bottom end of the sedimentation device at the bottom of the primary filter screen is in conflict with the bottom of the hopper.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention has a good filtering effect through the cooperation of the primary filter screen, the secondary filter screen, the tertiary filter screen and the quaternary 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 screens. It can also avoid the swinging of the arc filter plate, improve the stability of the arc filter plate, and prevent large movement or deformation between different filter screens during pumping or recharging operations, so as to avoid affecting the operation.

[0016] 2. The present invention conveys gas into the airbag bag through the cooperation of the inflation component and the expansion component, so that the airbag bag gradually expands, thereby pushing the arc-shaped contact plate fixed thereto 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 degree of the top cover, but also effectively improves the stability quality of the fixing mechanism, thereby stably supporting the fixing mechanism in the recharge well. The overall construction is simple and convenient, and the shaking or displacement of the fixing mechanism and the filtering mechanism inside it during pumping or recharge operations is avoided.

[0017] 3. Through the arrangement of the push rod, the movable plate and the 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, so that the stains remaining on the inner wall of the mud and sand basin can be scraped off and rinsed clean, keeping the inside of the mud and sand basin clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 The present invention provides a schematic diagram of the overall structure of a plug-in type in-wall filter for a groundwater recharge well; Figure 2 The present invention provides a partial structural schematic diagram of a plug-in wall filter for a groundwater recharge well; Figure 3 A front structural cross-sectional view of a plug-in type in-wall filter for a groundwater recharging well is provided by the present invention; Figure 4 The present invention provides a top-sectional view of a plug-in type in-wall filter for a groundwater recharge well.

[0020] The numbers in the figure represent the following: 1. Filter mechanism; 11. Primary filter; 111. Mud basin; 112. Movable plate; 113. Push rod; 114. Through hole; 115. Spring; 116. Limit cover; 117. Drain pipe; 12. Secondary filter; 13. Third-stage filter; 14. Fourth-stage filter; 15. Sediment collector; 2. Fixing mechanism; 21. Top cover; 22. Limit plate; 23. Limit groove; 24. First groove plate; 25. Second groove plate; 26. Clamp 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

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0022] like Figure 1 - Figure 4As shown, the present invention provides a plug-in wall filter for a groundwater recharge well, comprising a filtering mechanism 1 for filtering groundwater in the recharge well, the filtering 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 sleeved step by step, and also comprises a fixing mechanism 2 for placing the filtering mechanism 1, the fixing mechanism 2 comprises a top cover 21, the top cover 21 is movably sleeved on the outside of the primary filter screen 11, both sides of the top of the top cover 21 are fixedly connected to the limiting plates 22, and the two limiting plates 22 are provided with limiting openings The first filter screen 11 and the second filter screen 12 are respectively fixedly connected with two first groove plates 24 and two second groove plates 25 on both sides of the top, the two first groove plates 24 are respectively matched with the two limiting grooves 23, the two second groove plates 25 are respectively matched with the two first groove plates 24, the third filter screen 13 is fixedly connected with a clamping plate 26 on both sides of the top, the two clamping plates 26 are respectively matched with the two second groove plates 25, and the fourth filter screen 14 is fixedly connected with a limiting collar 27 on the top, the limiting collar 27 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.

[0023] 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-stage filter screen 11, the second-stage filter screen 12, the third-stage filter screen 13 and the fourth-stage filter screen 14 are set one by one inside the top cover 21. When placing, the first-stage filter screen 11 is first placed inside the top cover 21, and the first groove plates 24 on both sides of the first-stage filter screen 11 are correspondingly placed inside the two limiting grooves 23. Then, the second-stage filter screen 12 is placed inside the first-stage filter screen 11, and the two second groove plates 25 on both sides of the top are correspondingly placed inside the two first groove plates 24 on both sides of the first-stage filter screen 11. The third-stage filter screen 13 is placed inside the second-stage filter screen 12, and the two clamping plates 26 on both sides of the top are respectively placed in the two second groove plates 25. Finally, the fourth-stage filter screen 14 is inserted into the third-stage filter screen 13 until the limiting collar 27 on the top of the fourth-stage filter screen 14 contacts the top of the third-stage filter screen 13. Then, the entire fixing mechanism 2 is inserted into the recharging well. , until the top cover 21 hits the top of the recharging well. When siltation occurs after running for a period of time, the blocked fourth-stage filter 14 is lifted out separately or the fourth-stage filter 14, the third-stage filter 13, and the second-stage filter 12 are 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 are lifted out together. It can be selected according to the actual situation, and after flushing, it is re-placed in the well for continued use, so as to facilitate the disassembly, replacement or cleaning of all filters, and 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, and through the cooperation of the limiting ring 27, the clamping plate 26, the first groove plate 24, the second groove plate 25 and the limiting plate 22, the swinging 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.

[0024] Among them, in order to prevent the primary filter 11, the secondary filter 12, the tertiary filter 13 and the quaternary filter 14 from moving upward after being placed, they can be fixed by bolts or the limiting ring 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 so that they can be adsorbed and fixed to further improve the stability of the filtering mechanism 1. The settings of the above-mentioned bolts or magnetic plates are all existing technologies.

[0025] 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 a gas supply assembly 6 for conveying gas to the inside 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 respectively fixedly connected to the top cover 21 and the hopper 3. The two expansion assemblies 5 are respectively installed on the outer walls of the two arc-shaped fixing plates 4. The gas 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. Through the arrangement of 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 reinjection well when placing or removing the primary filter 11, causing the primary filter 11 to deform or the wall of the reinjection well to collapse.

[0026] 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.

[0027] The air supply assembly 6 includes a semi-arc air duct 61, a turning pipe 62 and two air inlet pipes 63. The semi-arc air duct 61 is fixedly arranged inside the top cover 21, and the semi-arc air duct 61 is located between the top cover 21 and the primary filter 11. The turning pipe 62 is connected to the top of the semi-arc air duct 61, and a control valve is installed on the turning pipe 62. The two air inlet pipes 63 are respectively connected to the two ends of the semi-arc air duct 61, and the two air inlet pipes 63 respectively pass through the two arc-shaped fixing plates 4 and then extend to the inside of the two airbag bags 52.

[0028] When the fixing mechanism 2 is placed in the reinjection well, the turning pipe 62 is connected to an external air pump or a push-type air pump and other equipment, and then the control valve is opened to allow the external air pump or the push-type air pump to pump external gas to the turning pipe 62 and the semi-arc 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 bag 52 is filled, the air bag 52 gradually expands, thereby pushing the arc-shaped contact plate 51 fixed thereto to move closer to the wall of the reinjection well until it completely contacts the wall of the reinjection well. The two air bag 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 quality of the fixing mechanism 2, thereby stably supporting the fixing mechanism 2 in the reinjection 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 reinjection operations.

[0029] 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.

[0030] The bottom of the hopper 3 is funnel-shaped, and the bottom end of the sediment collector 15 at the bottom of the primary filter screen 11 is in conflict with the bottom of the hopper 3 .

[0031] Through the interference cooperation of all the sediment collectors 15, a gap for accommodating filter residues and sediments 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 are in contact with the bottom of the hopper 3, which can limit the position of the first-level filter screen 11.

[0032] 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 a movable plate 112 is axially sealed and slidably connected inside the sediment basin 111. A push rod 113 is fixedly connected to the middle position of the bottom end of the movable plate 112, and a through hole 114 for the push rod 113 to pass through is provided in the middle position of the bottom end of the sediment basin 111. The push rod 113 and the through hole 114 axially seal and slide, and a spring 115 is movably sleeved on the outside of the push rod 113. 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.

[0033] The outer wall of the mud and sand basin 111 is connected to a drainage pipe 117 located below the movable plate 112 , and a one-way valve is arranged inside the drainage pipe 117 .

[0034] 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 flow passes through the primary filter screen 11, the secondary filter screen 12, the tertiary filter screen 13 and the quaternary filter screen 14 in sequence to complete the filtration, playing a multi-stage filtration role, 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 small, the movable plate 112 remains in the initial position, and the sediment inside the quaternary filter screen 14 is The sediment accumulated on the top of the movable plate 112 can be moved down when the water pressure is high, 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 below the drain pipe 117, the sediment on the movable plate 112 is discharged along 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, thereby keeping the inside of the mud and sand basin 111 clean.

[0035] The protection scope of the application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the application within the essence and protection scope of the application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the application.

Claims

1. A plug-in type in-wall filter for a groundwater recharging well, comprising a filtering mechanism (1) for filtering groundwater in a recharging well, the filtering 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 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 sides of the top cover (21) being fixedly connected to limit plates (22), the two limit plates (22) being provided with limit grooves (23), the top sides of the primary filter screen (11) and the secondary filter screen (12) being respectively fixedly connected to two first groove plates (24) and two second groove plates (25), the two first groove plates (25) being fixedly connected to the top sides of the primary filter screen (11) and the secondary filter screen (12), The second groove plates (24) are respectively matched with the two limit grooves (23), the two second groove plates (25) are respectively matched with the two first groove plates (24), the top of the third-stage filter screen (13) is fixedly connected with a clamping plate (26) on both sides, the two clamping plates (26) are respectively matched with the two second groove plates (25), and the top of the fourth-stage filter screen (14) is fixedly connected with a limit ring (27), the limit ring (27) is located above the third-stage filter screen (13), and the outer diameter of the limit ring (27) is equal to the outer diameter of the third-stage filter screen (13).

2. The plug-in wall filter for groundwater recharging well according to claim 1, characterized in that: 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 a gas 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); and the gas 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).

3. A plug-in wall filter for groundwater recharging well according to claim 2, 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), the airbag bag (52) is located between the arc-shaped contact plate (51) and the arc-shaped fixing plate (4), and two sides of the airbag bag (52) are respectively fixedly connected to the arc-shaped contact plate (51) and the arc-shaped fixing plate (4).

4. The plug-in wall filter for groundwater recharging well according to claim 3, 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 primary 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 two ends of the semi-arc-shaped air guide pipe (61), and the two air intake pipes (63) respectively penetrate two arc-shaped fixing plates (4) and then extend to the inside of two airbag bags (52).

5. The plug-in wall filter for groundwater recharging 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, and 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.

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

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

8. The plug-in wall filter for groundwater recharging well according to claim 2, 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 primary filter (11) abuts against the bottom of the hopper (3).

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