Sponge city anti-blocking seepage and drainage structure

Abstract

This application relates to the field of seepage and drainage engineering, and in particular to a sponge city anti-clogging seepage and drainage structure, comprising a porous water collection pipe buried underground, a filter cloth disposed within the pipe for filtering sediment, a water collection cylinder connected to the bottom of the pipe opposite the filter cloth's backwater surface, a backflush assembly disposed on the pipe for pumping clean water from the cylinder and impacting the backwater surface of the filter cloth, and a mud discharge pipe connected to the bottom of the pipe opposite the filter cloth's frontwater surface, a mud discharge valve electrically connected to a control system. This application has the advantage of improving pipeline anti-clogging performance.

Description

Technical Field

[0001] The present application relates to the field of seepage and drainage engineering, and in particular to a sponge city anti-blocking seepage and drainage structure. Background Art

[0002] Seepage drainage uses porous pipes buried underground to collect underground seepage water and discharge it to a designated location. It is often used in the drainage system of underground projects. Its advantage is that it can effectively lower the groundwater level and prevent groundwater from damaging the project structure.

[0003] When porous pipes are used to collect groundwater, the groundwater may bring fine particles of sediment into the pipes. After a long period of accumulation, the sediment may cause blockage of the pipes, which is an obvious drawback. Summary of the Invention

[0004] In order to improve the problem that sediment accumulation may clog pipes, the present application provides a sponge city anti-blocking seepage and drainage structure.

[0005] The present application provides a sponge city anti-blocking seepage and drainage structure that adopts the following technical solutions:

[0006] A sponge city anti-blocking seepage and drainage structure includes a porous water collecting pipe buried underground, a filter cloth for filtering sediment is arranged in the porous water collecting pipe, a water collecting cylinder is connected to the side of the bottom of the porous water collecting pipe opposite to the back water surface of the filter cloth, a recoil component is arranged on the porous water collecting pipe for extracting clean water in the water collecting cylinder and impacting the back water surface of the filter cloth, a mud discharge pipe is connected to the side of the bottom of the porous water collecting pipe opposite to the water front surface of the filter cloth, and a mud discharge pipe is arranged with a mud discharge valve electrically connected to the control system.

[0007] By adopting this technical solution, groundwater enters the porous water collection pipe and is intercepted by the filter cloth. If the filter cloth becomes clogged, the mud discharge valve is opened, and the backwash assembly draws clean groundwater from the water collection cylinder and impacts the backwater surface of the filter cloth. This flushes away the mud and sand clogging the frontwater surface of the filter cloth and discharges it through the mud discharge valve. Regular backwashing and unclogging of the filter cloth reduces the possibility of water collection pipe blockage.

[0008] Optionally, the backflush assembly includes a backflush valve tube arranged on a porous water collecting pipe and having a hollow interior, the bottom end of the backflush valve tube extends into the porous water collecting pipe and faces the back water surface of the filter cloth, a water suction pipe fixedly passing through the water collecting cylinder is arranged in the backflush valve tube, a lifting valve block is vertically slidable in the water suction pipe, a first one-way valve is arranged at the bottom of the water suction pipe, a motor electrically connected to the control system is arranged outside the backflush valve tube, the output shaft of the motor extends into the backflush valve tube and is coaxially arranged with a turntable, and a hinge is provided between the turntable and the lifting valve block. A connecting rod is connected, and the hinge between the connecting rod and the turntable is away from the rotation center of the turntable. A bracket with a water pump extending out is also arranged on the lifting valve block. A fixing ring is fixedly sleeved on the outer wall of the water pumping pipe, and a water outlet is opened at a position above the fixing ring between the inner and outer walls of the water pumping pipe. A sealing ring is slidably sleeved on the water pumping pipe through a pull wire on the bracket. The sealing ring is located above the fixing ring and is used to seal the water outlet. The fixing ring and the sealing ring are magnetically attracted to each other, and a second one-way valve is connected to the outer wall of the water pumping pipe below the water outlet.

[0009] By adopting the above-mentioned technical solution, the control system starts the motor, and the output shaft of the motor drives the turntable to rotate. The turntable drives the lifting valve block through the connecting rod to move back and forth in the pumping pipe. When the lifting valve block drives the bracket upward, the clean groundwater in the water collection barrel is pumped into the pumping pipe, and the bracket stretches the pull wire. Until the lifting valve block moves to near the highest point, the tension of the pull wire acting on the sealing ring is greater than the magnetic attraction between the sealing ring and the fixed ring. The sealing block detaches from the fixed block and is pulled upward. The sealing block releases its blocking effect on the water outlet. At this time, the groundwater in the pumping pipe that is higher than the water outlet flows out of the water outlet into the recoil valve pipe and is discharged from the bottom of the recoil valve pipe to achieve recoil on the filter cloth. When the lifting valve block descends, the sealing ring moves downward, magnetically attracts the fixed block again, and resumes its blocking effect on the water outlet. Thereafter, as the lifting valve block continues to descend, the air in the pumping pipe is discharged into the recoil pipe valve pipe through the second one-way valve.

[0010] Optionally, a sealing plate is arranged between the drain pipe and the backflush valve pipe, and the sealing plate is higher than the second one-way valve.

[0011] By adopting the above technical solution, the setting of the sealing plate allows the air discharged from the pumping pipe into the recoil valve pipe through the second one-way valve during the descending process of the lifting valve block, which can exert a certain pressure on the outflow of groundwater in the recoil valve pipe, thereby increasing the strength of the groundwater when it is sprayed from the bottom end of the recoil valve pipe onto the filter cloth, which is beneficial to improving the dredging effect of the filter cloth.

[0012] Optionally, the bottom end of the recoil valve tube is plug-fitted and clearance-fitted with a fixing column, a rotating sleeve is provided on the fixing column, a spiral channel is opened between the two sides of the rotating block relative to its axial direction, a plurality of elastic sheets are circumferentially arranged on the outer wall of the rotating block, and two circumferentially adjacent elastic sheets are tightly attached, and the elastic sheets are inclined along the water outlet direction of the bottom end of the recoil valve tube to contact the circumferential outer wall of the fixing column, and a screw cover is provided on the outer wall of the rotating block which is threadedly connected to the outer wall of the bottom end of the recoil valve tube and slides on the rotating sleeve.

[0013] By adopting this technical solution, when groundwater flows out of the bottom of the recoil valve tube, it pushes the elastic plate to slightly deform, causing the groundwater to spray out from the gap between the elastic plate and the fixed column. Due to the small diameter of the gap, the groundwater spray is strengthened, improving the recoil effect on the filter cloth. Furthermore, as the groundwater flows through the spiral channel, it drives the rotating block to rotate, thereby changing the position of the groundwater's recoil on the filter cloth, thereby improving the comprehensiveness of the recoil dredging of the filter cloth.

[0014] Optionally, the diameter of the spiral channel gradually decreases along the water outlet direction of the bottom end of the recoil valve pipe.

[0015] By adopting the above technical solution, the strength of groundwater spraying onto the filter cloth is further enhanced.

[0016] Optionally, the water collecting cylinder is connected to a ventilation pipe extending to the outside.

[0017] By adopting the above technical solution, when there is no groundwater in the water collecting cylinder, the pumping pipe draws air from the outside through the ventilation pipe, and can also backflush the filter cloth. The airflow ejected from the bottom of the recoil valve pipe will blow off the mud and sand blocking the filter cloth, which has strong applicability.

[0018] Optionally, the end of the ventilation pipe located outside is covered with a dust cover.

[0019] By adopting the above technical solution, the dust cover reduces the possibility of external impurities contaminating the clean groundwater in the water collection barrel.

[0020] Optionally, the lifting valve block is coated with polytetrafluoroethylene.

[0021] By adopting the above technical solution, the friction coefficient of polytetrafluoroethylene is relatively small, which is conducive to improving the smoothness of the lifting and lowering movement of the lifting valve block in the water pumping pipe.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. Groundwater enters the porous water collection pipe and is intercepted by the filter cloth. If the filter cloth becomes clogged, open the mud discharge valve, and the backwash component draws clean groundwater from the water collection cylinder and impacts the backwater surface of the filter cloth. This allows the mud and sand blocking the frontwater surface of the filter cloth to be washed down and discharged through the mud discharge valve. Regular backwashing and dredging of the filter cloth reduces the possibility of water collection pipe clogging.

[0024] 2. The control system starts the motor, and the output shaft of the motor drives the turntable to rotate. The turntable drives the lifting valve block to move back and forth in the pumping pipe through the connecting rod. When the lifting valve block drives the bracket to move upward, the clean groundwater in the water collection cylinder is pumped into the pumping pipe, and the bracket stretches the pull wire. Until the lifting valve block moves to near the highest point, the pulling force of the pull wire on the sealing ring is greater than the magnetic attraction between the sealing ring and the fixed ring, and the sealing block is separated from the fixed block and pulled upward. The sealing block releases the blocking effect on the water outlet. At this time, the groundwater in the pumping pipe that is higher than the water outlet flows out of the water outlet into the recoil valve pipe and is discharged from the bottom end of the recoil valve pipe to realize the recoil of the filter cloth. When the lifting valve block descends, the sealing ring moves downward, is magnetically attracted to the fixed block again, and resumes the blocking effect on the water outlet. After that, as the lifting valve block continues to descend, the air in the pumping pipe is discharged into the recoil pipe valve pipe through the second one-way valve;

[0025] 3. The setting of the sealing plate allows the air discharged from the water pumping pipe into the recoil valve pipe through the second one-way valve during the descending process of the lifting valve block to exert a certain pressure on the outflow of groundwater in the recoil valve pipe, thereby increasing the strength of the groundwater when it is ejected from the bottom of the recoil valve pipe onto the filter cloth, which is beneficial to improving the dredging effect of the filter cloth;

[0026] 4. When groundwater flows out of the bottom of the recoil valve tube, it pushes the elastic sheet to slightly deform, causing it to spray out from the gap between the elastic sheet and the fixed column. Due to the small diameter of the gap, the groundwater sprays out with increased strength, improving the recoil effect on the filter cloth. Furthermore, when groundwater flows through the spiral channel, it pushes the rotating block to rotate, thereby changing the recoil position of the groundwater on the filter cloth, thereby improving the comprehensiveness of the recoil dredging of the filter cloth.

[0027] 5. When there is no groundwater in the water collecting cylinder, the pumping pipe draws air from the outside through the vent pipe, which can also backflush the filter cloth. The airflow ejected from the bottom of the backflush valve pipe will blow off the mud and sand blocking the filter cloth, which has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of an embodiment of the present application.

[0029] Figure 2 It is a cross-sectional view of an embodiment of the present application.

[0030] Figure 3 yes Figure 2 Enlarged view of part A.

[0031] Figure 4 yes Figure 2 Magnified view of part B.

[0032] Explanation of the accompanying symbols: 1. Porous water collecting pipe; 2. Filter cloth; 3. Water collecting cylinder; 4. Mud discharge pipe; 5. Mud discharge valve; 610. Recoil valve pipe; 611. Suction pipe; 6111. Water outlet; 612. Lifting valve block; 613. First one-way valve; 614. Motor; 615. Turntable; 616. Connecting rod; 617. Bracket; 618. Fixed ring; 619. Pull wire; 620. Sealing ring; 621. Second one-way valve; 7. Sealing plate; 8. Fixed column; 9. Turning block; 91. Spiral channel; 10. Elastic sheet; 11. Screw cap; 12. Vent pipe; 13. Dust cover. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] The embodiment of the present application discloses a sponge city anti-blocking seepage and drainage structure.

[0035] Reference Figure 1 and Figure 2 The sponge city anti-blocking seepage and drainage structure includes a porous water collection pipe 1 buried horizontally underground. A filter cloth 2 for filtering sediment is arranged in the porous water collection pipe 1. The bottom of the porous water collection pipe 1 is connected to the water-facing side of the filter cloth 2 with a mud discharge pipe 4. The mud discharge pipe 4 is provided with a mud discharge valve 5 electrically connected to the control system.

[0036] Reference Figure 2 The bottom of the porous water collection pipe 1, facing the backwater side of the filter cloth 2, is connected to the water collection cylinder 3. A backwash component is arranged on the porous water collection pipe 1. Groundwater flows into the porous water collection pipe 1, and after the sediment is filtered by the filter cloth 2, some clean groundwater is stored in the water collection cylinder 3.

[0037] When the water-facing surface of the filter cloth 2 is clogged with mud, the backflush assembly extracts the clean groundwater in the water collecting cylinder 3 and backflushes the water-receiving surface of the filter cloth 2, so that the mud clogged in the filter cloth 2 can be flushed down and discharged from the porous water collecting pipe 1 through the mud discharge valve 5.

[0038] Reference Figure 2 and Figure 3 The backflush assembly includes a backflush valve tube 610 welded on the porous water collecting pipe 1 and having a hollow interior. The top end of the backflush valve tube 610 is closed, and the bottom end extends into the porous water collecting pipe 1 and toward the back water surface of the filter cloth 2.

[0039] A water pumping pipe 611 fixedly transmitted to the water collecting cylinder 3 is arranged in the backflush valve pipe 610, and a lifting valve block 612 slides vertically in the water pumping pipe 611. The lifting valve block 612 is coated with polytetrafluoroethylene. The bottom end of the water pumping pipe 611 is threadedly connected to the first one-way valve 613 near the bottom of the water collecting cylinder 3.

[0040] A motor 614 electrically connected to the control system is bolted to the outside of the recoil valve tube 610. The output shaft of the motor 614 extends into the recoil valve tube 610 and is coaxially arranged with a turntable 615. A connecting rod 616 is hinged between the turntable 615 and the lifting valve block 612. The hinge point between the connecting rod 616 and the turntable 615 is away from the rotation center of the turntable 615.

[0041] Reference Figure 2 and Figure 3 A fixing ring 618 is fixedly sleeved on the pipe body of the water pumping pipe 611 relative to the backflush valve pipe 610, and a plurality of water outlet holes 6111 are circumferentially opened at a position slightly higher than the fixing ring 618 between the inner and outer walls of the water pumping pipe 611.

[0042] The top of the lifting valve block 612 is threadedly connected to a T-shaped bracket 617. The top of the bracket 617 is higher than the top of the water suction pipe 611. A sealing ring 620 higher than the fixed ring 618 is slidingly sleeved on the outer wall of the water suction pipe 611. A pull wire 619 is tied between the sealing ring 620 and the top of the bracket 617. The sealing ring 620 is used to seal the water outlet 6111, and the sealing ring 620 and the fixed ring 618 are magnetically attracted to each other.

[0043] Reference Figure 2 and Figure 3 A second one-way valve 621 is connected to the outer wall of the water extraction pipe 611. The connection between the second one-way valve 621 and the water extraction pipe 611 is at the lowest position of the lifting valve block 612. A sealing plate 7 is welded between the drain pipe and the backflush valve pipe 610. The sealing plate 7 is higher than the sealing ring 620.

[0044] Reference Figure 2 and Figure 3 The control system starts the motor 614 , the output shaft of the motor 614 drives the turntable 615 to rotate, and the turntable 615 drives the lifting valve block 612 to move back and forth in the water pumping pipe 611 through the connecting rod 616 .

[0045] When the lifting valve block 612 drives the bracket 617 to move upward, the clean groundwater in the water collecting cylinder 3 is pumped into the pumping pipe 611. At this time, the bracket 617 stretches the pull wire 619, but the fixing ring 618 and the sealing ring 620 are still in an attractive state.

[0046] Until the lifting valve block 612 moves to near the highest point, the pulling force of the pull wire 619 on the sealing ring 620 is greater than the magnetic attraction between the sealing ring 620 and the fixed ring 618, the sealing block separates from the fixed block and is pulled upward, and the sealing block releases its blocking effect on the water outlet 6111.

[0047] At this time, the groundwater in the pumping pipe 611 that is higher than the water outlet 6111 flows out from the water outlet 6111 into the backflush valve pipe 610 , and the air between the backflush valve pipe 610 and the pumping pipe 611 enters the pumping pipe 611 .

[0048] When the lifting valve block 612 descends, the sealing ring 620 moves downward, magnetically attracts the fixed block again and resumes the sealing effect on the water outlet 6111. Thereafter, as the lifting valve block 612 continues to descend, the air and part of the groundwater in the pumping pipe 611 are discharged into the backflush pipe valve pipe through the second one-way valve 621.

[0049] Reference Figure 2 、 Figure 3 and Figure 4 The groundwater flowing between the backflush valve pipe 610 and the pumping pipe 611 is ejected from the bottom end of the backflush valve pipe 610 to impact the filter cloth 2, thereby achieving mud removal and dredging of the filter cloth 2.

[0050] Reference Figure 2 、 Figure 3 and Figure 4 The bottom end of the recoil valve tube 610 is plugged in and fitted with a fixed column 8 with clearance. A rotating block 9 is rotatably sleeved on the fixed column 8. A spiral channel 91 is opened between the two sides of the rotating block 9 relative to its axial direction. A plurality of elastic sheets 10 are bolted to the outer wall of the rotating block 9 in the circumferential direction.

[0051] Two circumferentially adjacent elastic sheets 10 are tightly attached to each other, and the elastic sheets 10 are inclined along the water outlet direction of the bottom end of the recoil valve tube 610 to abut against the circumferential outer wall of the fixed column 8. The outer wall of the rotating block 9 slides and rotates, and a rotating cover 11 is provided on the outer wall of the bottom end of the recoil valve tube 610 and is threadedly connected to the outer wall.

[0052] Reference Figure 2 、 Figure 3 and Figure 4 During the descent of the lifting valve block 612, the groundwater and air flowing out of the second one-way valve 621 exert a certain pressure on the outflow of the original groundwater at the bottom of the recoil valve tube 610. The groundwater pushes the elastic sheet 10 to undergo a slight deformation, so that the groundwater is ejected from the gap between the elastic sheet 10 and the fixed column 8. Due to the small diameter of the gap, the strength of the groundwater is enhanced when it is ejected, thereby improving the recoil effect on the filter cloth 2.

[0053] Moreover, when groundwater flows through the spiral channel 91 , it pushes the rotating block 9 to rotate, thereby changing the backwash position of the groundwater on the filter cloth 2 , thereby improving the comprehensiveness of the backwash dredging of the filter cloth 2 .

[0054] Reference Figure 4 The diameter of the spiral channel 91 gradually decreases along the water outlet direction of the bottom end of the backflush valve tube 610, further enhancing the strength of the groundwater spraying onto the filter cloth 2.

[0055] Reference Figure 1 A vent pipe 12 extending to the outside is connected to the water collecting cylinder 3 near its top, and a dust cover 13 is covered on one end of the vent pipe 12 located outside.

[0056] When there is no groundwater in the water collecting cylinder 3, the pumping pipe 611 draws air from the outside through the ventilation pipe 12, and can also backflush the filter cloth 2. The airflow ejected from the bottom of the backflush valve pipe 610 will blow down the mud and sand blocking the filter cloth 2, which has strong applicability.

[0057] The implementation principle of the sponge city anti-blocking seepage and drainage structure in the embodiment of the present application is as follows:

[0058] The control system starts the motor 614 , and the output shaft of the motor 614 drives the turntable 615 to rotate. The turntable 615 drives the lifting valve block 612 to move up and down in the water pumping pipe 611 through the connecting rod 616 .

[0059] When the lifting valve block 612 drives the bracket 617 upward, clean groundwater in the water collection tube 3 is pumped into the pumping pipe 611. At this time, the bracket 617 stretches the pull wire 619, but the fixed ring 618 and the blocking ring 620 are still in an attractive state. When the lifting valve block 612 moves to near the highest point, the tension exerted by the pull wire 619 on the blocking ring 620 is greater than the magnetic attraction between the blocking ring 620 and the fixed ring 618, and the blocking block detaches from the fixed block and is pulled upward, releasing its blocking effect on the water outlet 6111. At this time, the groundwater in the pumping pipe 611 that is higher than the water outlet 6111 flows out of the water outlet 6111 into the backflush valve pipe 610, and the air between the backflush valve pipe 610 and the pumping pipe 611 enters the pumping pipe 611.

[0060] As the lift valve block 612 descends, the sealing ring 620 moves downward, magnetically attracting the fixed block and resuming its sealing effect on the water outlet 6111. As the lift valve block 612 continues to descend, the air and some groundwater in the pumping pipe 611 are discharged into the backflush valve pipe through the second one-way valve 621. The groundwater flows through the spiral channel 91, pushing the rotating block 9 and the elastic plate 10 to rotate. This groundwater also causes the elastic plate 10 to slightly deform, causing the groundwater to spray out from the gap between the elastic plate 10 and the fixed column 8 onto the filter cloth 2, effectively backflushing and removing mud.

[0061] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sponge city anti-blocking seepage and drainage structure, characterized by: The invention comprises a porous water collecting pipe (1) buried underground, wherein a filter cloth (2) for filtering sediment is arranged in the porous water collecting pipe (1), a water collecting cylinder (3) is connected to the side of the bottom of the porous water collecting pipe (1) opposite to the water side of the filter cloth (2), a backwash component is arranged on the porous water collecting pipe (1) for pumping out clean water in the water collecting cylinder (3) and impacting the water side of the filter cloth (2), a mud discharge pipe (4) is connected to the side of the bottom of the porous water collecting pipe (1) opposite to the water side of the filter cloth (2), and a mud discharge valve (5) electrically connected to the control system is arranged on the mud discharge pipe (4); The backflush assembly comprises a backflush valve tube (610) arranged on a porous water collecting pipe (1) and having a hollow interior. The bottom end of the backflush valve tube (610) extends into the porous water collecting pipe (1) and faces the back water surface of the filter cloth (2). A water pumping pipe (611) fixedly extending into the water collecting cylinder (3) is arranged in the backflush valve tube (610). A lifting valve block (612) slides vertically in the water pumping pipe (611). A first one-way valve (613) is arranged at the bottom of the water pumping pipe (611). A motor (614) electrically connected to a control system is arranged outside the backflush valve tube (610). The output shaft of the motor (614) extends into the backflush valve tube (610) and is coaxially arranged with a rotating disk (615). A connecting rod (616) is hinged between the rotating disk (615) and the lifting valve block (612). The connecting rod (616) is connected to the rotating disk (615). The hinge of the turntable (615) is away from the rotation center of the turntable (615). The lifting valve block (612) is further provided with a bracket (617) extending from a water pumping pipe (611). A fixing ring (618) is fixedly sleeved on the outer wall of the water pumping pipe (611). A water outlet (6111) is provided between the inner and outer walls of the water pumping pipe (611) at a position above the fixing ring (618). A blocking ring (620) is slidably sleeved on the water pumping pipe (611) via a pull line (619) on the bracket (617). The blocking ring (620) is located above the fixing ring (618) and is used to block the water outlet (6111). The fixing ring (618) and the blocking ring (620) are magnetically attracted to each other. A second one-way valve (621) is connected to a position of the outer wall of the water pumping pipe (611) below the water outlet (6111). A sealing plate (7) is arranged between the water extraction pipe (611) and the backflush valve pipe (610), and the sealing plate (7) is higher than the second one-way valve (621).

2. The sponge city anti-blocking seepage and drainage structure according to claim 1 is characterized by: The bottom end of the recoil valve tube (610) is plug-fitted and clearance-fitted with a fixing column (8), a rotating block (9) is rotatably sleeved on the fixing column (8), a spiral channel (91) is opened between the two sides of the rotating block (9) relative to its axial direction, a plurality of elastic sheets (10) are circumferentially arranged on the outer wall of the rotating block (9), and two circumferentially adjacent elastic sheets (10) are tightly attached, and the elastic sheets (10) are tilted along the water outlet direction of the bottom end of the recoil valve tube (610) to abut against the circumferential outer wall of the fixing column (8), and a screw cap (11) is slidably and rotatably sleeved on the outer wall of the rotating block (9) and is threadedly connected to the outer wall of the bottom end of the recoil valve tube (610).

3. The anti-blocking seepage and drainage structure of sponge city according to claim 2 is characterized by: The diameter of the spiral channel (91) gradually decreases along the water outlet direction of the bottom end of the backflush valve pipe (610).

4. The anti-blocking seepage and drainage structure for sponge cities according to claim 1 is characterized by: The water collecting cylinder (3) is connected to a vent pipe (12) extending to the outside.

5. The anti-blocking seepage and drainage structure for sponge cities according to claim 4 is characterized by: One end of the vent pipe (12) located outside is covered with a dust cover (13).

6. The anti-blocking seepage and drainage structure for sponge cities according to claim 1 is characterized by: The lifting valve block (612) is coated with polytetrafluoroethylene.

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