CN209874027U - A drainage device for municipal administration sewage is collected - Google Patents
A drainage device for municipal administration sewage is collected Download PDFInfo
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- CN209874027U CN209874027U CN201920535126.7U CN201920535126U CN209874027U CN 209874027 U CN209874027 U CN 209874027U CN 201920535126 U CN201920535126 U CN 201920535126U CN 209874027 U CN209874027 U CN 209874027U
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Abstract
The utility model discloses a drainage device for municipal administration sewage is collected, including the cistern, left side bottom position is equipped with the sludge pump in the cistern, is connected with on the sludge pump and inhales the silt pipe, and top position evenly is equipped with a plurality of inlet tubes on the cistern, and in the one end of inlet tube stretched into the cistern, top right side position was equipped with the blow off pipe in the cistern, and the blow off pipe left side position was equipped with the closing plate in the cistern, and on the closing plate top was fixed in cistern top inner wall, the blow off pipe below was equipped with the filter screen, and the both ends of filter screen linked to each other with closing plate and cistern right side wall respectively, intermediate position supersound washing silt device in the cistern, supersound washing silt device was. The utility model discloses in, set up the barrier layer in the outside for prevent that the sewage in the cistern is outside to ooze, pollute the condition of soil and groundwater and take place, and corrosion-resistant layer then is used for preventing that the chemical composition in the sewage from eroding the structural layer, leads to the unstable condition of cistern structure to take place.
Description
Technical Field
The utility model belongs to the technical field of municipal sewage discharging equipment, specifically be a drainage device for municipal sewage is collected.
Background
Namely domestic sewage, industrial wastewater and runoff sewage in the urban area. Generally, the sewage is collected by urban canals and is discharged into water after being treated by an urban sewage treatment plant. In addition to containing a large amount of organic matters, germs and viruses in urban sewage, due to the advanced development of industry, the water quality of industrial wastewater (accounting for about 60-80% of the total amount of the urban sewage) is increasingly complex, the pollution of runoff sewage is increasingly serious, so that the urban sewage contains various toxic and harmful pollutants of various types and different degrees, and the urban sewage generally contains organic pollutants including carbohydrates, proteins, amino acids, fatty acids, grease, esters and other substances;
meanwhile, a lot of soil is attached to runoff sewage frequently, and after the soil is mixed with substances such as grease in domestic sewage, sludge in the sewage is difficult to remove and is easy to block a pipeline along with pipeline discharge.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: in order to solve the problem that the existing municipal sewage disposal equipment has low sludge treatment capacity in sewage, a drainage device for municipal sewage collection is provided.
The utility model adopts the technical scheme as follows:
the utility model provides a drainage device for municipal administration sewage is collected, includes the cistern, left side bottom position is equipped with the sludge pump in the cistern, is connected with on the sludge pump and inhales the silt pipe, and top position evenly is equipped with a plurality of inlet tubes on the cistern, and in the one end of inlet tube stretched into the cistern, top right side position was equipped with the blow off pipe in the cistern, and the blow off pipe left side position was equipped with the closing plate in the cistern, and on the closing plate top was fixed in cistern top inner wall, the blow off pipe below was equipped with the filter screen, and the both ends of filter screen link to each other with closing plate and cistern right side wall respectively, intermediate position supersound washing silt device in the cistern, supersound washing silt device was fixed in the cistern through the support.
When sewage deposits in the reservoir, the ultrasonic silt cleaning device is started, an ultrasonic generator and an ultrasonic transducer in the ultrasonic silt cleaning device send high-frequency ultrasonic waves to continuously vibrate the sewage in the reservoir, so that massive sundries in the sewage are scattered and deposited, meanwhile, the ultrafine soil in the sewage is vibrated and deposited, the effect of deposition and filtration is ensured, after simple deposition and filtration are carried out, the deposited sewage is pumped away through a blow-off pipe, a sludge pump is started simultaneously, sludge at the bottom of the reservoir is sucked away, the reservoir is discharged through a silt sucking pipe, the continuous deposition of the silt in the sewage is avoided, the discharged sewage is turbid, the condition of blocking a pipeline is caused, the water storage capacity of the reservoir is ensured simultaneously, the problem that the sludge is accumulated to occupy the water storage capacity of required water is avoided, and the normal work of water storage and drainage is ensured.
The reservoir is of a multi-layer structure, and an impermeable layer, a structural layer and an anti-corrosion layer are sequentially connected from outside to inside.
Wherein, the sludge pump below is equipped with the suction hopper, and the suction hopper is fixed in the cistern bottom of sludge pump below through the mount.
Wherein, evenly be equipped with the baffle on the suction hopper inner wall, the baffle is the slope setting, is the chute between the adjacent baffle.
Guide rails are respectively arranged at the front side and the rear side of the bottom in the reservoir, and a silt remover is arranged on the guide rails.
The silt remover comprises a shell, a worm is arranged in the shell, a driving worm rotating oil immersed motor is arranged in the shell, the left side and the right side of the guide rail are respectively provided with a fixed block, rivets are arranged on the fixed blocks, a convex tooth is arranged at the top of the guide rail and meshed with the worm, a supporting rod is connected between the silt remover on the front side and the rear side, and a scraper plate is connected to the bottom of the supporting rod.
The scraper blade comprises a sleeve plate and a sleeve plate, one end part of the sleeve plate extends into the sleeve plate, a spring is arranged in the sleeve plate, two ends of the spring are respectively connected with the sleeve plate and the sleeve plate, and a sealing gasket is arranged between the sleeve plate and the sleeve plate when the sleeve plate extends into the sleeve plate.
Wherein, the sleeve plate and the sleeve plate are arranged on the supporting rod in an inclined manner.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses in, when sewage deposits in the cistern, open the supersound and wash the silt device, supersonic generator in the supersound is washed silt device and ultrasonic transducer send the sewage in the high frequency ultrasonic wave constantly vibrates the cistern, cause cubic debris in the sewage to be shaken scattered and deposit, simultaneously with the superfine earth vibrations of sewage deposit, guarantee to deposit filterable effect, after carrying out simple sediment filtration, sewage after the sediment is taken out through the blow off pipe, open the sludge pump simultaneously, siphon away the mud of cistern bottom, and discharge silt cistern through inhaling silt pipe, avoid the continuous deposit of silt in the sewage, the sewage that leads to discharging into constantly is muddy, the condition of blocking up the pipeline takes place, the retaining volume of cistern has been guaranteed simultaneously, avoid mud to pile up and invade the problem appearance that occupies water demand retaining volume, the normal work of retaining drainage has been guaranteed.
2. The utility model discloses in, set up the barrier layer in the outside for prevent that the sewage in the cistern is outside to ooze, pollute the condition of soil and groundwater and take place, and corrosion-resistant layer then is used for preventing that the chemical composition in the sewage from eroding the structural layer, leads to the unstable condition of cistern structure to take place.
3. The utility model discloses in, through setting up the suction hopper, when the sludge pump carries out the soil pick-up, the suction of increase sludge pump contacts mud more simultaneously, guarantees the soil pick-up effect, and separates into the chute that the equidistance inclined through the baffle on the suction hopper inner wall, and when the sludge pump soil pick-up, mud and sewage are inhaled through the chute, and the spiral suction orbit makes the rivers of bottom present the swirl, and the suction of increase sludge pump promotes soil pick-up efficiency.
4. The utility model discloses in, when needs carry out the desilting, rotate through oily motor control worm, because the worm meshes mutually with the dogtooth on the guide rail, when the worm rotates, promote the desilting ware and remove, and then drive the scraper blade and remove in the cistern bottom, the scraper blade is scraped the mud looks sludge pump department of cistern bottom and is concentrated, has made things convenient for the blowdown work of sludge pump.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic diagram of the structure of the reservoir in the present invention;
FIG. 3 is a top view of the middle rail and the silt remover of the present invention;
FIG. 4 is a schematic diagram of the structure of the desilting device of the present invention;
FIG. 5 is a schematic diagram of the structure of the scraper blade of the present invention;
fig. 6 is a schematic diagram of the inner wall structure of the middle suction hopper of the present invention.
The labels in the figure are: 1. a reservoir; 2. a silt suction pipe; 3. a water inlet pipe; 4. a blow-off pipe; 5. a sealing plate; 6. filtering with a screen; 7. a dredging device; 8. a guide rail; 9. an ultrasonic silt cleaning device; 10. a support frame; 11. a sludge pump; 12. a suction hopper; 13. a fixed mount; 14. an impermeable layer; 15. a structural layer; 16. a corrosion-resistant layer; 17. a strut; 18. a housing; 19. an oil immersed motor; 20. a worm; 21. a convex tooth; 22. a squeegee; 23. a fixed block; 24. riveting; 25. a sleeve plate; 26. sheathing; 27. a gasket; 28. a spring; 29. a partition plate; 30. a chute.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In a first embodiment, referring to fig. 1, a drainage apparatus for municipal sewage collection comprises a reservoir 1, a sludge pump 11 is arranged at the bottom of the left side in the reservoir 1, a sludge suction pipe 2 is connected on the sludge pump 11, a plurality of water inlet pipes 3 are uniformly arranged at the top of the reservoir 1, one end of each water inlet pipe 3 extends into the reservoir 1, a discharge pipe 4 is arranged at the right side of the top in the reservoir 1, a sealing plate 5 is arranged at the left side of the discharge pipe 4 in the reservoir 1, the top end of the sealing plate 5 is fixed on the inner wall of the top of the reservoir 1, a filter screen 6 is arranged below the discharge pipe 4, two ends of the filter screen 6 are respectively connected with the sealing plate 5 and the right side wall, an ultrasonic silt cleaning device 9 is arranged at the middle position in the reservoir 1, the ultrasonic silt cleaning device 9 is fixed in the reservoir 1 through a support frame 10, the ultrasonic silt cleaning device 9 comprises an ultrasonic generator and an ultrasonic transducer (not shown in the figure).
Embodiment two, please refer to fig. 1-2, a drainage apparatus for municipal sewage collection comprises a reservoir 1, a sludge pump 11 is disposed at the bottom of the left side of the reservoir 1, a sludge suction pipe 2 is connected to the sludge pump 11, a plurality of water inlet pipes 3 are uniformly disposed at the top of the reservoir 1, one end of each water inlet pipe 3 extends into the reservoir 1, a sewage discharge pipe 4 is disposed at the right side of the top of the reservoir 1, a sealing plate 5 is disposed at the left side of the sewage discharge pipe 4 of the reservoir 1, the top end of the sealing plate 5 is fixed on the inner wall of the top of the reservoir 1, a filter screen 6 is disposed below the sewage discharge pipe 4, two ends of the filter screen 6 are respectively connected to the sealing plate 5 and the right side wall of the reservoir 1, an ultrasonic sludge washing apparatus 9 is disposed at the middle of the reservoir 1, the ultrasonic sludge washing apparatus 9 is fixed in the reservoir 1 by a support frame 10, the ultrasonic sludge washing, the reservoir 1 is of a multilayer structure, and is formed by sequentially connecting an impermeable layer 14, a structural layer 15 and a corrosion-resistant layer 16 from outside to inside.
The impermeable layer 14 is arranged on the outer side and is used for preventing sewage in the reservoir 1 from permeating outwards to pollute the ground and underground water, and the corrosion-resistant layer 16 is used for preventing chemical components in the sewage from corroding the structural layer 15, so that the structure of the reservoir 1 is unstable.
In the third embodiment, please refer to fig. 1 and 6, a drainage apparatus for municipal sewage collection comprises a reservoir 1, a sludge pump 11 is disposed at the bottom of the left side of the reservoir 1, a sludge suction pipe 2 is connected to the sludge pump 11, a plurality of water inlet pipes 3 are uniformly disposed at the top of the reservoir 1, one end of each water inlet pipe 3 extends into the reservoir 1, a drain pipe 4 is disposed at the right side of the top of the reservoir 1, a sealing plate 5 is disposed at the left side of the drain pipe 4 of the reservoir 1, the top end of the sealing plate 5 is fixed on the inner wall of the top of the reservoir 1, a filter screen 6 is disposed below the drain pipe 4, two ends of the filter screen 6 are respectively connected to the sealing plate 5 and the right side wall of the reservoir 1, an ultrasonic sludge washing apparatus 9 is disposed at the middle of the reservoir 1, the ultrasonic sludge washing apparatus 9 is fixed in the reservoir 1 by a support frame 10, the ultrasonic sludge washing apparatus, a suction hopper 12 is arranged below the sludge pump 11, the suction hopper 12 is fixed at the bottom of the reservoir 1 below the sludge pump 11 through a fixing frame 13, partition plates 29 are uniformly arranged on the inner wall of the suction hopper 12, the partition plates 29 are arranged in an inclined mode, and inclined grooves 30 are formed between the adjacent partition plates 29.
Through setting up suction hopper 12, when sludge pump 11 carries out the soil pick-up, the suction of increase sludge pump 11 contacts mud more simultaneously, guarantees the soil pick-up effect, and separates into the chute 30 of equidistance slope through baffle 29 on the suction hopper 12 inner wall, and when sludge pump 11 soil pick-up, mud and sewage are inhaled through chute 30, and the spiral suction orbit makes the rivers of bottom present the swirl, and the suction of increase sludge pump 11 promotes the soil pick-up efficiency.
In a fourth embodiment, referring to fig. 1 and 3 to 4, a drainage apparatus for municipal sewage collection includes a reservoir 1, a sludge pump 11 is arranged at the bottom of the left side in the reservoir 1, a sludge suction pipe 2 is connected on the sludge pump 11, a plurality of water inlet pipes 3 are uniformly arranged at the top of the reservoir 1, one end of each water inlet pipe 3 extends into the reservoir 1, a discharge pipe 4 is arranged at the right side of the top in the reservoir 1, a sealing plate 5 is arranged at the left side of the discharge pipe 4 in the reservoir 1, the top end of the sealing plate 5 is fixed on the inner wall of the top of the reservoir 1, a filter screen 6 is arranged below the discharge pipe 4, two ends of the filter screen 6 are respectively connected with the sealing plate 5 and the right side wall, an ultrasonic silt cleaning device 9 is arranged at the middle position in the reservoir 1, the ultrasonic silt cleaning device 9 is fixed in the reservoir 1 through a support frame 10, the ultrasonic silt cleaning device 9 comprises an ultrasonic generator and an ultrasonic transducer (not shown in the figure);
both sides position is equipped with guide rail 8 respectively around the bottom in cistern 1, is equipped with desilting ware 7 on guide rail 8, desilting ware 7 includes casing 18, is equipped with worm 20 in the casing 18, is equipped with drive worm 20 pivoted oily motor 19 in the casing 18, the left and right sides position is equipped with fixed block 23 respectively on the guide rail 8, is equipped with rivet 24 on the fixed block 23, and the top position is equipped with dogtooth 21 on the guide rail 8, and dogtooth 21 meshes with worm 20 mutually, be connected with branch 17 between the desilting ware 7 of both sides around, the bottom position is connected with scraper blade 22 on branch 17.
In fifth embodiment, referring to fig. 1 and 3 to 5, a drainage apparatus for municipal sewage collection includes a reservoir 1, a sludge pump 11 is arranged at the bottom of the left side in the reservoir 1, a sludge suction pipe 2 is connected on the sludge pump 11, a plurality of water inlet pipes 3 are uniformly arranged at the top of the reservoir 1, one end of each water inlet pipe 3 extends into the reservoir 1, a discharge pipe 4 is arranged at the right side of the top in the reservoir 1, a sealing plate 5 is arranged at the left side of the discharge pipe 4 in the reservoir 1, the top end of the sealing plate 5 is fixed on the inner wall of the top of the reservoir 1, a filter screen 6 is arranged below the discharge pipe 4, two ends of the filter screen 6 are respectively connected with the sealing plate 5 and the right side wall, an ultrasonic silt cleaning device 9 is arranged at the middle position in the reservoir 1, the ultrasonic silt cleaning device 9 is fixed in the reservoir 1 through a support frame 10, the ultrasonic silt cleaning device 9 comprises an ultrasonic generator and an ultrasonic transducer (not shown in the figure);
the front side and the rear side of the bottom in the impounding reservoir 1 are respectively provided with a guide rail 8, the guide rail 8 is provided with a silt remover 7, the silt remover 7 comprises a shell 18, a worm 20 is arranged in the shell 18, an oil immersed motor 19 which drives the worm 20 to rotate is arranged in the shell 18, the left side and the right side of the guide rail 8 are respectively provided with a fixed block 23, the fixed block 23 is provided with a rivet 24, the upper top part of the guide rail 8 is provided with a convex tooth 21, the convex tooth 21 is meshed with the worm 20, a supporting rod 17 is connected between the silt remover 7 at the front side and the back side, a scraper 22 is connected at the upper bottom of the supporting rod 17, the scraping plate 22 comprises a sleeve plate 25 and a sleeve plate 26, one end part of the sleeve plate 26 extends into the sleeve plate 25, a spring 28 is arranged in the sleeve plate 25, two ends of the spring 28 are respectively connected with the sleeve plate 25 and the sleeve plate 26, the sleeve plate 26 extends into the sleeve plate 25, a sealing gasket 27 is arranged between the sleeve plate 25 and the sleeve plate 25, and the sleeve plate 25 and the sleeve plate 26 are obliquely arranged on the supporting rod 17.
When needs carry out the desilting, rotate through oil-immersed motor 19 control worm 20, because worm 20 meshes with dogtooth 21 on the guide rail 8 mutually, when worm 20 rotated, promote desilting ware 7 and remove, and then drive the scraper blade and remove in cistern 1 bottom, scraper blade 22 scrapes the mud looks sludge pump 11 department of cistern 1 bottom and moves concentratedly, has made things convenient for sludge pump 11's blowdown work.
The working principle is as follows: when in use, municipal sewage is collected into the reservoir 1 in a centralized manner through the water inlet pipe 3, simple sedimentation and filtration are carried out in the reservoir 1, when the sewage is sedimentated, the ultrasonic silt cleaning device 9 is started, the ultrasonic generator and the ultrasonic transducer in the ultrasonic silt cleaning device 9 send out high-frequency ultrasonic waves to vibrate the sewage in the reservoir 1 continuously, so that massive sundries in the sewage are vibrated, dispersed and precipitated, and meanwhile, ultrafine soil in the sewage is vibrated and precipitated, so that the sedimentation and filtration effects are ensured, after the simple sedimentation and filtration are carried out, the precipitated sewage is pumped out through the sewage discharge pipe 4, meanwhile, the sludge pump 11 is started to suck away the sludge at the bottom of the reservoir 1, and the sludge is discharged out of the reservoir 1 through the sludge suction pipe 2, thereby avoiding the continuous sedimentation of the sludge in the sewage, leading to the continuous turbidity of the discharged sewage, the pipeline blockage condition and ensuring the water storage capacity of the, the problem that the sludge is accumulated to invade the water demand and the water storage capacity is avoided, and the normal work of water storage and drainage is ensured.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a drainage device for municipal administration sewage is collected, including cistern (1), a serial communication port, left side bottom position is equipped with sludge pump (11) in cistern (1), be connected with on sludge pump (11) and inhale silt pipe (2), cistern (1) is gone up the top position and evenly is equipped with a plurality of inlet tubes (3), the one end of inlet tube (3) stretches into in cistern (1), cistern (1) inside top right side position is equipped with blow off pipe (4), cistern (1) inside blow off pipe (4) left side position is equipped with closing plate (5), closing plate (5) top is fixed in on cistern (1) top inner wall, blow off pipe (4) below is equipped with filter screen (6), the both ends of filter screen (6) link to each other with closing plate (5) and cistern (1) right side wall respectively, intermediate position ultrasonic washing silt device (9) in cistern (1), the ultrasonic silt cleaning device (9) is fixed in the reservoir (1) through a support frame (10), and the ultrasonic silt cleaning device (9) comprises an ultrasonic generator and an ultrasonic transducer.
2. A drainage apparatus for municipal sewage collection according to claim 1, wherein the reservoir (1) is of a multi-layer structure, and an impermeable layer (14), a structural layer (15) and an anti-corrosion layer (16) are sequentially provided from the outside to the inside.
3. The drainage device for municipal sewage collection according to claim 1, wherein a suction hopper (12) is provided below the sludge pump (11), and the suction hopper (12) is fixed to the bottom of the reservoir (1) below the sludge pump (11) by a fixing frame (13).
4. A discharge device for municipal sewage collection according to claim 3, wherein the suction hopper (12) has baffles (29) uniformly distributed on the inner wall, the baffles (29) are inclined, and the chutes (30) are formed between adjacent baffles (29).
5. A drainage apparatus for municipal sewage collection according to claim 1, wherein guide rails (8) are provided at the front and rear sides of the bottom of the reservoir (1), and the guide rails (8) are provided with sludge cleaners (7).
6. The drainage device for municipal sewage collection according to claim 5, wherein the sludge remover (7) comprises a housing (18), a worm (20) is arranged in the housing (18), an oil immersed motor (19) for driving the worm (20) to rotate is arranged in the housing (18), fixed blocks (23) are respectively arranged at the left side and the right side of the guide rail (8), rivets (24) are arranged on the fixed blocks (23), a convex tooth (21) is arranged at the top of the guide rail (8), the convex tooth (21) is meshed with the worm (20), a support rod (17) is connected between the sludge remover (7) at the front side and the rear side, and a scraper (22) is connected at the bottom of the support rod (17).
7. A drainage arrangement for municipal sewage collection according to claim 6, wherein the scraper (22) comprises a sleeve plate (25) and a sleeve plate (26), one end of the sleeve plate (26) extends into the sleeve plate (25), a spring (28) is arranged in the sleeve plate (25), the two ends of the spring (28) are connected with the sleeve plate (25) and the sleeve plate (26) respectively, and a sealing gasket (27) is arranged between the sleeve plate (25) and the sleeve plate (26) when the sleeve plate (26) extends into the sleeve plate (25).
8. A drain arrangement for municipal sewage collection according to claim 7, wherein the sleeve plate (25) and sleeve plate (26) are inclined on the post (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535126.7U CN209874027U (en) | 2019-04-17 | 2019-04-17 | A drainage device for municipal administration sewage is collected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535126.7U CN209874027U (en) | 2019-04-17 | 2019-04-17 | A drainage device for municipal administration sewage is collected |
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| Publication Number | Publication Date |
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| CN209874027U true CN209874027U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920535126.7U Active CN209874027U (en) | 2019-04-17 | 2019-04-17 | A drainage device for municipal administration sewage is collected |
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| CN (1) | CN209874027U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255054A (en) * | 2020-03-09 | 2020-06-09 | 都宁艳 | Automatic dredging device for sewer |
-
2019
- 2019-04-17 CN CN201920535126.7U patent/CN209874027U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255054A (en) * | 2020-03-09 | 2020-06-09 | 都宁艳 | Automatic dredging device for sewer |
| CN111255054B (en) * | 2020-03-09 | 2021-04-06 | 南京溧水高新创业投资管理有限公司 | Automatic dredging device for sewer |
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