CN112942541B

CN112942541B - Drainage system based on sponge city

Info

Publication number: CN112942541B
Application number: CN202110153240.5A
Authority: CN
Inventors: 王游川; 朱勇; 段海粟; 程必胜
Original assignee: Chongqing Hanzhou Construction Engineering Co ltd
Current assignee: Chongqing Hanzhou Construction Engineering Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-05-27
Anticipated expiration: 2041-02-04
Also published as: CN112942541A

Abstract

The utility model relates to a drainage system based on sponge city belongs to sponge city drainage structures's field, and it includes the inspection shaft and installs the escape canal on the inspection shaft, and the inspection shaft includes well hole and closing cap well lid on the well hole, the inner wall that the inspection shaft is close to the escape canal is equipped with prevents blockking up the mechanism, prevents blockking up the mechanism and includes the closing cap filter screen at the escape canal tip. This application has and to reduce the escape canal and be blockked up to reduce the effect that influences the possibility of drainage.

Description

Drainage system based on sponge city

Technical Field

The application relates to the field of sponge urban drainage structures, in particular to a drainage system based on a sponge city.

Background

The sponge city is a city with good drainage capability in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like, and the city is required to have a high-efficiency drainage system.

Referring to fig. 1, a sponge city drainage system of the related art generally includes an inspection well 1 and a drainage ditch 2 communicating with the inspection well 1, the inspection well 1 including a well 11 having an open top end and a well cover 12 covering the open end of the well 11.

In view of the above-mentioned related art, the inventors believe that sewage contains a large amount of garbage and impurities, and the sewage is likely to clog drainage ditches for a long time, thereby possibly affecting drainage.

Disclosure of Invention

In order to reduce the escape canal and be blockked up to reduce the possibility that influences the drainage, this application provides a drainage system based on sponge city.

The application provides a drainage system based on sponge city adopts following technical scheme:

the utility model provides a drainage system based on sponge city, includes the inspection shaft and installs the escape canal on the inspection shaft, and the inspection shaft includes well hole and the well lid of closing cap on the well hole, the inner wall that the inspection shaft is close to the escape canal is equipped with prevents blockking up the mechanism, prevents blockking up the mechanism and includes the filter screen that the closing cap is close to the tip of inspection shaft one end at the escape canal.

Through adopting above-mentioned technical scheme, when sewage got into the escape canal from the inspection shaft, the filter screen can filter the sewage that gets into the escape canal, reduces the possibility that the escape canal blockked up to reduce the possibility that influences the drainage.

Optionally, prevent blockking up the mechanism and still include around the framework around the filter screen, the framework is inboard to be seted up flutedly along length direction, recess and filter screen edge thickness looks adaptation, and the filter screen is pegged graft in the recess, and the framework is close to the inner wall butt in escape canal with the well opening.

Through adopting above-mentioned technical scheme, the framework is with the filter screen tensioning to play the supporting role to the filter screen, reduce the possibility that the filter screen warp under water impact.

Optionally, the inspection well comprises a well hole and a well cover covered on the well hole, the well hole comprises a through lower part and an upper part, the upper part and the lower part are coaxially arranged, the caliber of the upper part is larger than that of the lower part, and the drainage ditch and the frame body are arranged on the side wall of the upper part.

Through adopting above-mentioned technical scheme, impurity such as silt in the sewage can deposit in the lower part, reduces the possibility that the great impurity of weight such as mud blockked up the filter screen. In addition, since the diameter of the lower portion is smaller than that of the upper portion, the possibility that the filter net and the frame body sink to the lower portion can be reduced.

Optionally, the top end of the well hole is fixed with first angle steel, the first angle steel is arranged around the top end of the well hole, the well cover is installed between the first angle steel, the first angle steel is arranged on one side, away from the well hole, of the back of the well hole, a bonding layer is arranged, and plates are paved on the bonding layer.

Through adopting above-mentioned technical scheme, the adhesive linkage can be glued panel and first angle steel and fix around the well entrance to a cave mouth, and panel can improve the hardness around the well entrance to a cave mouth portion, reduces the possibility that well entrance to a cave oral area warp to be favorable to prolonging the leakproofness of well lid to the well hole.

Optionally, prevent that jam mechanism still includes the desilting subassembly, the desilting subassembly includes the drive unit that long-pending silt plate of long-pending silt plate and drive go up and down, long-pending silt plate is installed at the well opening diapire, long-pending silt plate perisporium and well opening inner wall contact, drive unit includes motor and threaded rod, the motor is installed on the well lid, the threaded rod rotates to be connected between well opening diapire and well lid, threaded rod one end and motor output shaft are fixed, the threaded rod is worn to establish in long-pending silt plate and is continuous with long-pending silt plate screw thread, the well opening cross-section is the polygon.

Through adopting above-mentioned technical scheme, heavier impurity deposition such as silt is to long-pending silt board, when silt accumulates a certain amount and needs the clearance, relevant personnel accessible motor drive threaded rod rotates, the threaded rod rotates the upward movement of process transmission long-pending silt board, after long-pending silt board removes to being higher than the surface of water, relevant personnel can upwards lift the well lid and remove to keeping away from the well opening, then impurity such as silt on the long-pending silt board is cleared up, thereby clear away the impurity in the well opening, further reduce impurity such as silt and pile up the possibility of blockking up the filter screen.

Optionally, the holding tank has been seted up respectively to long-pending silt plate perisporium, installs an at least spring in the holding tank, and the spring is on a parallel with long-pending silt plate setting, and spring end connection has the expansion plate, and the expansion plate is kept away from spring one end, is shortened gradually to being close to lower part one side, and the expansion plate is kept away from spring one end and is kept away from one side of lower part can with the inner wall butt of well opening.

Through adopting above-mentioned technical scheme, when long-pending silt plate is located the lower part, the spring is compressed, in the shrink-fit plate indentation holding tank, make the shrink-fit plate keep away from holding tank one end can support tightly with the inner wall of lower part, thereby make heavier impurity such as silt in the sewage can both deposit to long-pending silt plate, when the long-pending silt plate rebound of drive unit drive, long-pending silt plate promotes the water upward movement of lower part and flows from the escape canal gradually, thereby can lift out the inspection shaft with long-pending silt plate and clear up, can also discharge the sewage in the inspection shaft. And, when long-pending silt plate moved upper portion, because upper portion bore is great, the spring loses the lower part inner wall extrusion and extends, and the spring extension process promotes the expansion plate and moves to and supports tightly with upper portion inner wall to make long-pending silt plate shift up the process and can clear up upper portion inner wall.

Optionally, one side of the frame body, which is far away from the drainage ditch, is flush with the inner wall of the lower part.

Through adopting above-mentioned technical scheme, when long-pending silt plate rebound to lower part and upper portion link up the department, because long-pending silt plate wherein the expansion plate of one side and framework butt can reduce because the bore of upper portion is greater than the lower part, long-pending silt plate pushes out the expansion plate at the spring with the upper portion inner wall butt before pivoted possibility to play the effect of limited direction to long-pending silt plate.

Optionally, the retractable plate includes a plate body connected to the spring and an elastic plate fixed to an end of the plate body away from the spring.

Through adopting above-mentioned technical scheme, elastic deformation takes place easily for the elastic plate receives the extrusion of well opening inner wall to it is inseparabler with the inner wall laminating of well opening, can improve the clean dynamics to the well opening inner wall.

Optionally, a cavity is formed in the elastic plate, the cavity is arranged along the length direction of the elastic plate, the cavity faces the side wall of the well lid and is provided with a feed inlet, the cavity faces one side of the inner wall of the well hole and is provided with a plurality of micropores, and the feed inlet and the micropores are communicated with the cavity.

Through adopting above-mentioned technical scheme, relevant personnel accessible feed inlet fills the antiseptic solution in the looks cavity for long-pending silt plate removes the in-process downwards under drive unit's drive, and the elastic plate is owing to receive the extrusion deformation of well hole inner wall, thereby extrudes the antiseptic solution in the cavity from the micropore and spouts the inner wall to the well hole, thereby disinfects the well hole inner wall, produces the possibility that toxic gas spills over the polluted environment in the reduction inspection shaft.

Optionally, the micro-holes are obliquely arranged, and one end of each micro-hole far away from the cavity is lower than one end of each micro-hole close to the cavity.

Through adopting above-mentioned technical scheme, the micropore slope sets up, can reduce the micropore tip and receive the slow possibility of going out liquid of well opening inner wall pressure, can also make the micropore slant spout the antiseptic solution of well opening inner wall down can be close to well lid one end by the elastic plate and wipe the uniformity, improves the effective coverage area of antiseptic solution to the well opening inner wall to improve disinfection efficiency.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when sewage enters the drainage ditch from the inspection well, the filter screen filters the sewage entering the drainage ditch, so that the possibility of blockage of the drainage ditch is reduced, and the possibility of influencing drainage is reduced;

2. related personnel can drive the silt collecting plate to move upwards through the driving unit, when the silt collecting plate moves to a position higher than the water surface, the related personnel can lift the well cover upwards and move the well cover to a position far away from the well hole, and then impurities such as silt on the silt collecting plate are cleaned, so that the impurities in the well hole are removed, and the possibility that the filter screen is blocked by the accumulated impurities such as silt is further reduced;

3. the disinfection liquid is filled in the phase cavity of the feeding hole, so that the silt accumulating plate is driven by the driving unit to move downwards, the elastic plate is extruded from the micropores and sprayed to the inner wall of the well hole due to the extrusion deformation of the inner wall of the well hole, the inner wall of the well hole is disinfected, and the possibility that the toxic gas generated in the inspection well overflows to pollute the environment is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of a related art sponge municipal drainage system of the background art;

FIG. 2 is a schematic longitudinal sectional view of a sponge city based drainage system according to example 1 of the present application;

FIG. 3 is a schematic cross-sectional view of a sponge-based municipal drainage system of example 1 of the present application;

FIG. 4 is a schematic longitudinal section of a sponge city based drainage system of example 2 of the present application;

fig. 5 is an enlarged view of a portion a of fig. 4.

Description of reference numerals: 0. a water inlet ditch; 1. an inspection well; 11. a well hole; 111. a lower portion; 112. an upper portion; 12. a well cover; 2. a drainage ditch; 3. an anti-clogging mechanism; 31. a filter screen; 32. a frame body; 321. a groove; 33. a silt accumulating plate; 331. accommodating a tank; 34. a motor; 35. a threaded rod; 36. a spring; 37. a retractable plate; 371. a plate main body; 372. an elastic plate; 3721. a cavity; 3722. a feed inlet; 3723. micropores; 4. a first angle steel; 5. an adhesive layer; 6. a plate material; 7. a second angle steel; 8. a plain soil layer; 9. a concrete floor; 10. brick masonry.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses drainage system based on sponge city.

Example 1

Referring to fig. 2, drainage system based on sponge city includes inspection shaft 1 and installs escape canal 2 on inspection shaft 1, and inspection shaft 1 is close to the inner wall of escape canal 2 and is equipped with prevents blockking up mechanism 3, prevents blockking up mechanism 3 and includes the filter screen 31 of closing cap at escape canal 2 tip, and when sewage got into escape canal 2 from inspection shaft 1, filter screen 31 can filter the sewage that gets into escape canal 2, reduces the possibility that escape canal 2 blockked up to reduce the possibility that influences the drainage.

The inspection well 1 comprises a well hole 11 and a well cover 12 covered on the well hole 11, wherein a first angle steel 4 is fixed at the top end of the well hole 11, the first angle steel 4 can be a hot galvanizing angle steel or a stainless steel angle steel, the cross section of the first angle steel 4 is L-shaped, and the first angle steel 4 is arranged around the top end of the well hole 11. First angle steel 4 deviates from 11 one sides of well hole and is equipped with adhesive linkage 5, and adhesive linkage 5 keeps away from 11 one end extensions of well hole to first angle steel 4, and adhesive linkage 5 can be cement mortar screed-coat or concrete layer, and adhesive linkage 5 can link first angle steel 4 after solidifying to ground, and then is convenient for cover well lid 12. The board 6 is laid on the bonding layer 5, the board 6 can be a 25mm thick fire board or a ceramic tile, the board 6 and the first angle steel 4 are fixed around the opening of the well hole 11 by the bonding layer 5, the board 6 can improve the hardness around the opening of the well hole 11, and the possibility of deformation of the opening of the well hole 11 is reduced.

The well lid 12 can be the 304 corrosion resistant plate of rectangle, and the last predetermined hole for hoist that has two symmetries to set up of well lid 12 includes two round holes and with two rectangle mouths that communicate with the round hole, hoist and mount well lid 12 when being convenient for install. The peripheral cladding of well lid 12 has second angle steel 7, second angle steel 7 is the same with first angle steel 4, make well lid 12 lid close when on well hole 11, well lid 12 is installed between the rectangle frame that first angle steel 4 enclosed, the perisporium of well lid 12 and the rectangle frame inner wall butt that first angle steel 4 enclosed, first angle steel 4 and second angle steel 7 constitute the structure that the cross-section is the T shape, second angle steel 7 surface is smooth, clean, can reduce well lid 12 and soil and glue the possibility of gluing to be difficult to move.

The borehole 11 comprises a lower part 111 and an upper part 112 which penetrate through the borehole, the sections of the upper part 112 and the lower part 111 are both square, the upper part 112 and the lower part 111 are coaxially arranged, and the caliber of the upper part 112 is larger than that of the lower part 111. During construction, a constructor can firstly excavate the ground to form the well 11, then tamp the bottom and the periphery of the well 11 to form the plain soil layer 8, and then pour the C10-grade concrete bottom plate 9 with the thickness of 100mm on the plain soil layer 8 at the bottom of the well 11 for improving the flatness of the bottom wall of the well 11. After the concrete bottom plate 9 is solidified, constructors can construct the brick masonry 10 with the thickness of 240mm on the inner wall of the well hole 11, so that the strength of the inner wall of the well hole 11 is improved, and the possibility of collapse of the well hole 11 is reduced. The inner walls of the upper part 112 and the lower part 111 can be pasted with 300-450 mm white face bricks for improving the smoothness of the inner wall of the well hole 11.

The escape canal 2 sets up in upper portion 112 one side, and the escape canal 2 cross-section is the rectangle and the bottom of escape canal 2 aligns with the bottom of upper portion 112, and the top of escape canal 2 aligns with upper portion 112 top, and the bottom at upper portion 112 is installed to filter screen 31 for impurity such as silt in the sewage can deposit lower part 111, reduces the possibility that the great impurity of weight such as mud blockked up filter screen 31. Further, since the diameter of the lower portion 111 is smaller than that of the upper portion 112, the possibility that the filter net 31 sinks down to the lower portion 111 can be reduced.

Referring to fig. 2 and 3, filter screen 31 can be the metal mesh of rectangle, filter screen 31 has the framework 32 all around the cladding, framework 32 can be hot-galvanize angle steel, framework 32 is close to the inner wall butt of escape canal 2 with well 11, framework 32 is inboard to have seted up recess 321 along length direction, recess 321 and the marginal thickness looks adaptation of filter screen 31, filter screen 31 pegs graft in recess 321, make framework 32 can be with filter screen 31 tensioning, and play the supporting role to filter screen 31, reduce the possibility that filter screen 31 warp under water impact. Upper portion 112 is kept away from the lateral wall of escape canal 2 and is connected with into ditch 0 with the adjacent lateral wall of escape canal 2, and it can be with adjacent inspection shaft 1 intercommunication to intake ditch 0, after the escape canal 2 of one of them inspection shaft 1 blockked up, can arrange adjacent inspection shaft 1 with sewage and clear up.

The implementation principle of the drainage system based on the sponge city in embodiment 1 of the application is as follows: when sewage enters the drainage ditch 2 from the inspection well 1, the filter screen 31 can filter the sewage entering the drainage ditch 2, so that the possibility of blockage of the drainage ditch 2 is reduced, and the possibility of influence on drainage is reduced.

Example 2

Referring to fig. 4, a drainage system based on a sponge city is different from the embodiment 1 in that: the anti-blocking mechanism 3 further comprises a dredging component, the dredging component comprises a dredging plate 33 and a driving unit, the dredging plate 33 is a square plate identical to the bottom wall of the lower part 111, and the dredging plate 33 is installed at the bottom of the well hole 11, so that impurities such as sludge in sewage can be deposited on the dredging plate 33. The drive unit includes motor 34 and threaded rod 35, motor 34 installs on well lid 12, threaded rod 35 wears to establish between 11 diapalls of well cave and well lid 12 and can rotate, the output shaft that shaft coupling and motor 34 are passed through on the threaded rod 35 top is fixed, threaded rod 35 wears to establish in long-pending silt plate 33 and links to each other with long-pending silt plate 33 screw thread for when motor 34 drives threaded rod 35 and rotates, long-pending silt plate 33 can not rotate because the restriction of 11 inner walls of well cave, thereby make long-pending silt plate 33 can only follow threaded rod 35 axial displacement.

When silt accumulates to a certain amount and needs the clearance, relevant personnel accessible motor 34 drive threaded rod 35 rotates, threaded rod 35 rotates the upward removal of process transmission long-pending silt plate 33, moves to being higher than the surface of water back when long-pending silt plate 33, and relevant personnel can upwards lift up well lid 12 and move to keeping away from well hole 11, then clear up impurity such as silt on long-pending silt plate 33 to clear away the impurity in the well hole 11, further reduce impurity such as silt and pile up the possibility of blockking up filter screen 31.

Referring to fig. 5, accommodating grooves 331 are respectively formed in the peripheral side walls of the silt accumulating plate 33, a row of springs 36 which are parallel to each other and arranged at intervals are installed in the accommodating grooves 331, the springs 36 are arranged in parallel to the silt accumulating plate 33, one end of each spring 36 is welded to the corresponding accommodating groove 331, and a telescopic plate 37 is welded to the other end of each spring 36. The expansion plate 37 comprises a plate main body 371 and an elastic plate 372, the plate main body 371 is a rectangular plate, the plate main body 371 is connected with the spring 36, the elastic plate 372 is a rubber plate with elasticity, the elastic plate 372 is fixedly bonded to the plate main body 371 and is far away from one end of the spring 36, the end, far away from the spring 36, of the elastic plate 372 is gradually shortened towards one side close to the lower part 111, the end face, far away from one end of the spring 36, of the elastic plate 372 is an arc face, so that the accumulated silt plate 33 is driven by the driving unit to move downwards to the joint of the upper part 112 and the lower part 111, one end, far away from the spring 36, of the elastic plate 372 is extruded by the lower part 111, and the elastic plate 372 can slide towards the accommodating groove 331.

When the silt deposit plate 33 is located in the lower part 111, the spring 36 is compressed, the expansion plate 37 retracts into the accommodating groove 331, and one end of the expansion plate 37, which is far away from the accommodating groove 331, can be tightly abutted against the inner wall of the lower part, so that heavy impurities such as silt in sewage can be deposited on the silt deposit plate 33. When the driving unit drives the silt collecting plate 33 to move upwards, the silt collecting plate 33 pushes the water in the lower part 111 upwards and gradually flows out of the drainage ditch 2, so that the silt collecting plate 33 can be lifted out of the inspection well 1 to be cleaned, and the sewage in the inspection well 1 can be discharged. And, when the silt deposit plate 33 moves to the upper part, because the caliber of the upper part is large, the spring 36 loses the extrusion of the inner wall of the lower part 111 and extends, the extension process of the spring 36 pushes the expansion plate 37 to move to be tightly abutted against the inner wall of the upper part 112, so that the inner wall of the upper part 112 can be cleaned in the upward moving process of the silt deposit plate 33, and sewage is pushed to continue to move upwards.

The side of the frame 32 far away from the drainage ditch 2 is flush with the inner wall of the lower part 111, when the silt collecting plate 33 moves upwards to the joint of the lower part 111 and the upper part 112, because the expansion plate 37 of the silt collecting plate 33 near the drainage ditch 2 is abutted with the frame 32, the possibility that the silt collecting plate 33 rotates before the expansion plate 37 is pushed out to abut with the inner wall of the upper part 112 by the spring 36 because the caliber of the upper part 112 is larger than that of the lower part 111 can be reduced, and the silt collecting plate 33 has the function of limiting the direction.

The elastic plate 372 is internally provided with a cavity 3721, the cavity 3721 is arranged along the length direction of the elastic plate 372, the cavity 3721 faces the side wall of the well lid 12 and is provided with a feed port 3722, and the feed port 3722 is communicated with the cavity 3721, so that relevant personnel can inject disinfectant into the cavity 3721 through the feed port 3722. Cavity 3721 has seted up one row of micropore 3723 towards 11 inner wall one sides in cave, micropore 3723 and cavity 3721 intercommunication, micropore 3723 slope sets up, micropore 3723 is kept away from cavity 3721 one end and is less than micropore 3723 and be close to cavity 3721 one end, make long-pending silt plate 33 in the downstream process under drive unit's drive, elastic plate 372 is owing to receive the extrusion deformation of 11 inner walls in cave, micropore 3723 is simultaneously because the deformation of elastic plate 372 and grow, thereby extrude and spout the inner wall of cave 11 in the antiseptic solution in the cavity 3721 from micropore 3723, disinfect 11 inner walls in cave, the antiseptic solution can be disinfection deodorant solution, reduce the possibility that produces toxic gas and spill the polluted environment in the inspection shaft 1. Micropore 3723 that the slope set up can reduce the micropore 3723 tip and receive the slow possibility of going out liquid of 11 inner walls pressure of wellhole, can also make micropore 3723 slant spout down the disinfectant of 11 inner walls of wellhole can be close to well lid 12 one end by elastic plate 372 and be wiped evenly, improves the effective coverage area of antiseptic to 11 inner walls of wellhole to improve disinfection efficiency.

To reduce the possibility of a large amount of disinfectant overflowing from feed port 3722, a pneumatic check valve is clamped in feed port 3722, so that disinfectant can only enter cavity 3721 from feed port 3722, but can not overflow from feed port 3722.

The implementation principle difference of the drainage system based on the sponge city in embodiment 2 of the application is as follows: install amasss silt board 33 in well hole 11 bottom for impurity such as silt in the sewage can deposit on amasss silt board 33, when silt accumulates a certain amount and needs the clearance, relevant personnel accessible motor 34 drive threaded rod 35 rotates, threaded rod 35 rotates process transmission amasss silt board 33 and upwards removes, after amasss silt board 33 moves to being higher than the surface of water, relevant personnel can upwards lift up well lid 12 and move to keeping away from well hole 11, then clear up impurity such as silt on the amasss silt board 33, thereby clear up impurity in the well hole 11, further reduce impurity such as silt and pile up the possibility of blockking up filter screen 31.

The related personnel can inject disinfectant into the cavity 3721 through the feed port 3722, so that in the process that the silt collecting plate 33 moves downwards under the driving of the driving unit, the elastic plate 372 is extruded and deformed by the inner wall of the well 11, and meanwhile, the micropores 3723 are enlarged due to the deformation of the elastic plate 372, so that the disinfectant in the cavity 3721 is extruded out of the micropores 3723 and sprayed to the inner wall of the well 11, the inner wall of the well 11 is disinfected, and the possibility that toxic gas generated in the inspection well 1 overflows to pollute the environment is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a drainage system based on sponge city, includes inspection shaft (1) and installs escape canal (2) on inspection shaft (1), and inspection shaft (1) includes well hole (11) and well lid (12) of closing cap on well hole (11), its characterized in that: the inner wall of the inspection well (1) close to the drainage ditch (2) is provided with an anti-blocking mechanism (3), and the anti-blocking mechanism (3) comprises a filter screen (31) which is sealed at the end part of the drainage ditch (2) close to the inspection well (1); the anti-blocking mechanism (3) further comprises a frame body (32) surrounding the periphery of the filter screen (31), a groove (321) is formed in the inner side of the frame body (32) along the length direction, the groove (321) is matched with the edge thickness of the filter screen (31), the filter screen (31) is inserted into the groove (321), and the frame body (32) is abutted to the inner wall, close to the drainage ditch (2), of the well hole (11); the well hole (11) comprises a lower part (111) and an upper part (112) which are communicated, the upper part (112) and the lower part (111) are coaxially arranged, the caliber of the upper part (112) is larger than that of the lower part (111), and the drainage ditch (2) and the frame body (32) are arranged on the side wall of the upper part (112); the anti-blocking mechanism (3) further comprises a dredging component, the dredging component comprises a dredging plate (33) and a driving unit for driving the dredging plate (33) to lift, the dredging plate (33) is installed at the bottom of the well hole (11), the peripheral wall of the dredging plate (33) is in contact with the inner wall of the well hole (11), the driving unit comprises a motor (34) and a threaded rod (35), the motor (34) is installed on the well lid (12), the threaded rod (35) is rotatably connected between the bottom wall of the well hole (11) and the well lid (12), one end of the threaded rod (35) is fixed with an output shaft of the motor (34), the threaded rod (35) penetrates through the dredging plate (33) and is in threaded connection with the dredging plate (33), and the cross section of the well hole (11) is polygonal; the peripheral wall of the silt accumulating plate (33) is respectively provided with a containing groove (331), at least one spring (36) is installed in the containing groove (331), the spring (36) is arranged in parallel to the silt accumulating plate (33), the end part of the spring (36) is connected with a telescopic plate (37), one end of the telescopic plate (37) far away from the spring (36) is gradually shortened towards one side close to the lower part (111), and one side of one end of the telescopic plate (37) far away from the spring (36) far away from the lower part (111) can be abutted to the inner wall of the well hole (11); the telescopic plate (37) comprises a plate main body (371) connected with the spring (36) and an elastic plate (372) fixed at one end of the plate main body (371) far away from the spring (36); seted up cavity (3721) in elastic plate (372), cavity (3721) set up along elastic plate (372) length direction, and cavity (3721) have seted up feed inlet (3722) towards the lateral wall of well lid (12), and cavity (3721) have seted up a plurality of micropores (3723) towards well hole (11) inner wall one side, and feed inlet (3722) and micropore (3723) and cavity (3721) communicate.

2. The sponge city-based drainage system of claim 1, wherein: well hole (11) top is fixed with first angle steel (4), and first angle steel (4) set up around well hole (11) top, and well lid (12) are installed between first angle steel (4), and first angle steel (4) deviate from well hole (11) one side and are equipped with adhesive linkage (5), and adhesive linkage (5) upper berth is equipped with panel (6).

3. The sponge city-based drainage system of claim 1, wherein: one side of the frame body (32) far away from the drainage ditch (2) is flush with the inner wall of the lower part (111).

4. The sponge city based drainage system of claim 1, wherein: the micropores (3723) are obliquely arranged, and one end of each micropore (3723) far away from the cavity (3721) is lower than one end of each micropore (3723) close to the cavity (3721).