CN113338412A - Rainfall drainage structure - Google Patents
Rainfall drainage structure Download PDFInfo
- Publication number
- CN113338412A CN113338412A CN202110624100.1A CN202110624100A CN113338412A CN 113338412 A CN113338412 A CN 113338412A CN 202110624100 A CN202110624100 A CN 202110624100A CN 113338412 A CN113338412 A CN 113338412A
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- CN
- China
- Prior art keywords
- filter screen
- cavity
- fixedly connected
- water
- assembly
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0402—Gullies for use in roads or pavements provided with flushing means for cleaning or emptying
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
Abstract
The invention discloses a rainfall drainage structure, which relates to the technical field of building construction, and comprises a body, wherein a first cavity and a second cavity are arranged in the body, and the rainfall drainage structure also comprises: the water outlet is arranged in the body and used for discharging accumulated water; the second filter screen is arranged in the water outlet and movably connected with the water outlet and is used for filtering sundries; the reciprocating mechanism is arranged in the second cavity, is connected with one end of the second filter screen and is used for driving the second filter screen to reciprocate; and the cleaning mechanism is arranged in the second cavity, connected with the reciprocating mechanism and used for cleaning the second filter screen. According to the invention, the water outlet is arranged for draining water, the second filter screen is used for filtering sundries, when the second filter screen needs to be cleaned, the reciprocating mechanism is started to drive the second filter screen to reciprocate, and the cleaning mechanism is used for cleaning the second filter screen without detaching the filter screen, so that the water-saving and labor-saving cleaning machine is time-saving, rapid and convenient.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a rainfall drainage structure.
Background
The building construction refers to the building construction process and is a production activity. The construction method comprises foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction and the like, and the working place is called a construction site.
In the building construction, need handle the ponding at scene, drainage structures commonly used, current drainage structures are when wasing its inside filter screen, mostly need dismantle the filter screen and wash, and is consuming time and power, and the operation is complicated, consequently, a rainfall drainage structures is needed to solve above-mentioned problem urgently.
Disclosure of Invention
An embodiment of the present invention provides a rainfall drainage structure to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a rainfall drainage structures, includes the body, inside first cavity and the second cavity of being equipped with of body still includes:
the water outlet is arranged in the body and used for discharging accumulated water; and
the second filter screen is arranged in the water outlet and movably connected with the water outlet and is used for filtering sundries; and
the reciprocating mechanism is arranged in the second cavity, is connected with one end of the second filter screen and is used for driving the second filter screen to reciprocate; and
and the cleaning mechanism is arranged in the second cavity, is connected with the reciprocating mechanism and is used for cleaning the second filter screen.
As a further scheme of the invention: the reciprocating mechanism includes:
one end of the connecting component is connected with one end of the second filter screen, and the other end of the connecting component is connected with the second cavity; and
and the driving assembly is connected with the connecting assembly and used for driving the connecting assembly to reciprocate so as to drive the second filter screen to reciprocate.
As a further scheme of the invention: coupling assembling includes the connecting frame, connecting frame one side outer wall and second filter screen one end fixed connection, the inside elastic component that is equipped with of connecting frame, one side inner wall fixed connection that elastic component one end and connecting frame are close to the second filter screen, the elastic component other end and limiting plate one side fixed connection, limiting plate opposite side and sliding plate one end fixed connection, the sliding plate run through the connecting frame opposite side and rather than sliding connection, the sliding plate other end and second cavity fixed connection.
As a further scheme of the invention: the driving assembly comprises a rack, the rack is fixedly connected with the connecting frame, the rack is meshed with one side of the gear-lacking wheel with gear teeth, and the center of the gear-lacking wheel is fixedly connected with the output end of the power device.
As a further scheme of the invention: the cleaning mechanism includes:
the brush is fixedly connected with the second cavity and used for cleaning the second filter screen; and
the spraying assembly is movably connected with the eccentric part of the missing gear at one end and is used for spraying the second filter screen to be matched with the hairbrush for cleaning.
As a further scheme of the invention: the spray assembly comprises:
the water tank is fixedly connected with the second cavity, and clear water is filled in the water tank; and
one end of the water pumping component is movably connected with the eccentric part of the missing gear, and the other end of the water pumping component is hinged with the second cavity and used for pumping out clean water in the water tank for spraying.
As a further scheme of the invention: one end of the water outlet close to the ground is fixedly connected with a first filter screen.
As a further scheme of the invention: be equipped with on the second filter screen and strike off the mechanism, strike off the mechanism and include:
the scraping component is arranged on one side, close to the first filter screen, of the second filter screen and is used for scraping sundries on the second filter screen; and
the power assembly is arranged in the first cavity, is connected with one side of the scraping component and is used for driving the scraping component to move; and
the collecting assembly is arranged inside the body and used for collecting sundries.
A drainage apparatus comprising a rainfall drainage mechanism as described above, further comprising: the crushing mechanism is arranged in the collecting cavity and is used for crushing sundries; and the treatment mechanism is used for carrying out subsequent treatment on the crushed sundries.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the water outlet is arranged for draining water, the second filter screen is used for filtering sundries, when the second filter screen needs to be cleaned, the reciprocating mechanism is started to drive the second filter screen to reciprocate, and the cleaning mechanism is used for cleaning the second filter screen without detaching the filter screen, so that the water-saving and labor-saving cleaning machine is time-saving, rapid and convenient.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram at a in fig. 1.
Fig. 3 is a perspective view of the scraping assembly of the present invention.
In the figure: 1. a body; 2. a water outlet; 3. a first filter screen; 4. a second filter screen; 5. a collection chamber; 6. a baffle plate; 7. a first spring; 8. a first cavity; 9. a first motor; 10. a threaded rod; 11. a threaded sleeve; 12. a connecting plate; 13. a resisting block; 14. a squeegee; 15. a second cavity; 16. a brush; 17. a connecting frame; 18. a rack; 19. a second spring; 20. a limiting plate; 21. a sliding plate; 22. a gear is missing; 23. a connecting rod; 24. a sealing cylinder; 25. a piston; 26. a water outlet pipe; 27. a connecting pipe; 28. a spray head; 29. a water tank; 30. and (4) a water inlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model provides a rainfall drainage structures, includes body 1, body 1 is inside to be equipped with first cavity 8 and second cavity 15, still includes:
the water outlet 2 is arranged in the body 1 and used for discharging accumulated water; and
the second filter screen 4 is arranged in the water outlet 2, is movably connected with the water outlet and is used for filtering sundries; and
the reciprocating mechanism is arranged in the second cavity 15, is connected with one end of the second filter screen 4 and is used for driving the second filter screen 4 to reciprocate; and
and the cleaning mechanism is arranged in the second cavity 15, connected with the reciprocating mechanism and used for cleaning the second filter screen 4.
The outlet 2 carries out the drainage, and second filter screen 4 filters debris, when needs wash second filter screen 4, starts reciprocating motion mechanism and drives 4 reciprocating motion of second filter screen, and wiper mechanism washs second filter screen 4.
Referring to fig. 1-2, the reciprocating mechanism according to an embodiment of the present invention includes:
one end of the connecting component is connected with one end of the second filter screen 4, and the other end of the connecting component is connected with the second cavity 15; and
and the driving assembly is connected with the connecting assembly and used for driving the connecting assembly to reciprocate, so that the second filter screen 4 is driven to reciprocate.
The driving component drives the connecting component to reciprocate, so as to drive the second filter screen 4 to reciprocate.
As an embodiment of the present invention, referring to fig. 1 to 2, the connection assembly includes a connection frame 17, an outer wall of one side of the connection frame 17 is fixedly connected to one end of the second filter screen 4, an elastic member is disposed inside the connection frame 17, one end of the elastic member is fixedly connected to an inner wall of one side of the connection frame 17 close to the second filter screen 4, the other end of the elastic member is fixedly connected to one side of a limiting plate 20, the other side of the limiting plate 20 is fixedly connected to one end of a sliding plate 21, the sliding plate 21 penetrates through the other side of the connection frame 17 and is slidably connected thereto, and the other end of the sliding plate 21 is fixedly connected to the second cavity 15. The drive assembly drives the connecting frame 17 to move, so that the second filter screen 4 is driven to move, the connecting frame 17 is matched with the limiting plate 20 to extrude the elastic part, and under the reaction force of the elastic part, the connecting frame 17 moves reversely, so that the second filter screen 4 reciprocates. The elastic member may be a spring plate, an elastic rubber, etc., and in this embodiment, the elastic member is preferably the second spring 19.
Referring to fig. 1-2, the driving assembly includes a rack 18, the rack 18 is fixedly connected to the connecting frame 17, the rack 18 is engaged with one side of the gear 22, and the center of the gear 22 is fixedly connected to the output end of the power device. In this embodiment, the power device is preferably a motor. The power device drives the gear 22 to rotate, when one side of the gear 22 with the gear teeth is meshed with the rack 18, the gear 22 drives the rack 18 to move, so that the second filter screen 4 is driven to move, and when the gear 22 rotates to the side without the gear teeth, the connecting frame 17 drives the second filter screen 4 to move in the reverse direction under the reaction force of the elastic part, so that the second filter screen 4 reciprocates.
Referring to fig. 1-2, the cleaning mechanism according to an embodiment of the present invention includes:
the brush 16 is fixedly connected with the second cavity 15 and used for cleaning the second filter screen 4; and
one end of the spraying component is movably connected with the eccentric part of the missing gear 22 and is used for spraying the second filter screen 4 so as to be matched with the brush 16 for cleaning.
The spraying assembly sprays water to cooperate with the brush 16 to clean the second filter 4.
Referring to fig. 1-2, a spray assembly according to an embodiment of the present invention includes:
the water tank 29 is fixedly connected with the second cavity 15, and clear water is filled in the water tank 29; and
one end of the water pumping component is movably connected with the eccentric part of the missing gear 22, and the other end of the water pumping component is hinged with the second cavity 15 and used for pumping out the clean water in the water tank 29 for spraying.
As an embodiment of the present invention, please refer to fig. 1-2, the water pumping assembly includes a connecting rod 23, one end of the connecting rod 23 is hinged to an eccentric position of the missing gear 22, the connecting rod 23 penetrates through the sealing cylinder 24 and is slidably connected thereto, the other end of the connecting rod 23 is fixedly connected with a piston 25, the piston 25 is disposed inside the sealing cylinder 24 and is slidably connected thereto, the other end of the sealing cylinder 24 is hinged to the second cavity 15, the inside of the sealing cylinder 24 is communicated with one end of a water inlet pipe 30, the other end of the water inlet pipe 30 is communicated with the inside of the water tank 29, the inside of the sealing cylinder 24 is communicated with one end of a water outlet pipe 26, the other end of the water outlet pipe 26 is connected with a connecting pipe 27, the connecting pipe 27 is fixedly connected with the second cavity 15, and the connecting pipe 27 is connected with a plurality of spray nozzles 28. The gear-lacking wheel 22 rotates to drive the connecting rod 23 to reciprocate up and down, so as to drive the piston 25 to reciprocate, and the water inlet pipe 30 is matched to pump out the clean water in the water tank 29 and spray the clean water out through the spray head 28, so that the second filter screen 4 is cleaned.
Referring to fig. 1, as an embodiment of the present invention, a first filter screen 3 is fixedly connected to one end of the water outlet 2 close to the ground.
Referring to fig. 1, as an embodiment of the present invention, a scraping mechanism is disposed on the second filter screen 4, and the scraping mechanism includes:
the scraping component is arranged on one side, close to the first filter screen 3, of the second filter screen 4 and is used for scraping sundries on the second filter screen 4; and
the power assembly is arranged in the first cavity 8, connected with one side of the scraping component and used for driving the scraping component to move; and
the collecting assembly is arranged inside the body 1 and used for collecting sundries.
The power component drives and supports the debris of scraping the subassembly on with second filter screen 4 and strike off, collects through collecting the subassembly.
As an embodiment of the present invention, referring to fig. 1 and fig. 3, the scraping component includes a scraping plate 14, the scraping plate 14 abuts against the second filter screen 4, the scraping plate 14 is fixedly connected to one end of the connecting plate 12, and a pushing block 13 is fixedly connected to one side of the scraping plate 14 away from the power component. The power component drives the connecting plate 12 to move, the connecting plate 12 drives the scraper 14, and the scraper 14 scrapes sundries. The power assembly can adopt an electric telescopic rod, a hydraulic rod and the like.
Referring to fig. 1, the power assembly includes a threaded sleeve 11, the threaded sleeve 11 is fixedly connected to a connecting plate 12, a threaded rod 10 is disposed inside the threaded sleeve 11 and is in threaded connection with the threaded sleeve, one end of the threaded rod 10 is fixedly connected to an output end of a first motor 9, and the first motor 9 is fixedly connected to a first cavity 8. The first motor 9 drives the threaded rod 10 to rotate, and the threaded rod 10 drives the threaded sleeve 11 to move, so that the connecting plate 12 is driven to move.
Referring to fig. 1, the collecting assembly includes a collecting cavity 5, the collecting cavity 5 is disposed inside the body 1, the collecting cavity 5 is hinged to one end of a baffle 6, one side of the baffle 6, which is far away from a connecting plate 12, is fixedly connected to one end of a first spring 7, and the other end of the first spring 7 is fixedly connected to the collecting cavity 5. The baffle 6 is pushed open by the resisting block 13, and the sundries are sent into the collecting cavity 5 by the scraper 14.
A drainage apparatus comprising a rainfall drainage mechanism as described above, further comprising: the crushing mechanism is arranged in the collecting cavity and is used for crushing sundries; and the treatment mechanism is used for carrying out subsequent treatment on the crushed sundries.
The working principle of the invention is as follows: the first filter screen 3 filters sundries for the first time, the second filter screen 4 filters for the second time, the first motor 9 drives the threaded rod 10 to rotate, the threaded rod 10 drives the threaded sleeve 11 to move, thereby driving the connecting plate 12 to move, the connecting plate 12 drives the scraper 14, the scraper 14 scrapes the sundries, the baffle 6 is pushed open by the abutting block 13, the scraper 14 sends the sundries into the collecting cavity 5, when the second filter screen 4 needs to be cleaned, the power device drives the missing gear 22 to rotate, when one side of the missing gear 22 with gear teeth is meshed with the rack 18, the missing gear 22 drives the rack 18 to move, thereby driving the second filter screen 4 to move, when the missing gear 22 rotates to one side without gear teeth, the connecting frame 17 drives the second filter screen 4 to move in reverse under the reaction force of the elastic part, so that the second filter screen 4 reciprocates, and simultaneously, the missing gear 22 rotates to drive the connecting rod 23 to reciprocate, thereby driving the piston 25 to reciprocate, and the clean water in the water tank 29 is pumped out through the nozzle 28 by matching with the water inlet pipe 30, and the second filter screen 4 is cleaned by matching with the brush 16.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a rainfall drainage structures, includes the body, inside first cavity and the second cavity of being equipped with of body, its characterized in that still includes:
the water outlet is arranged in the body and used for discharging accumulated water; and
the second filter screen is arranged in the water outlet and movably connected with the water outlet and is used for filtering sundries; and
the reciprocating mechanism is arranged in the second cavity, is connected with one end of the second filter screen and is used for driving the second filter screen to reciprocate; and
and the cleaning mechanism is arranged in the second cavity, is connected with the reciprocating mechanism and is used for cleaning the second filter screen.
2. A rainfall drainage arrangement according to claim 1 wherein the reciprocating means comprises:
one end of the connecting component is connected with one end of the second filter screen, and the other end of the connecting component is connected with the second cavity; and
and the driving assembly is connected with the connecting assembly and used for driving the connecting assembly to reciprocate so as to drive the second filter screen to reciprocate.
3. A rain drainage structure as claimed in claim 2, wherein the connection assembly includes a connection frame, an outer wall of one side of the connection frame is fixedly connected to one end of the second filter, an elastic member is disposed inside the connection frame, one end of the elastic member is fixedly connected to an inner wall of one side of the connection frame close to the second filter, the other end of the elastic member is fixedly connected to one side of the limiting plate, the other side of the limiting plate is fixedly connected to one end of the sliding plate, the sliding plate penetrates the other side of the connection frame and is slidably connected thereto, and the other end of the sliding plate is fixedly connected to the second chamber.
4. A rainfall drainage arrangement according to claim 3 wherein the drive assembly includes a rack fixedly connected to the connection frame, the rack engaging a side of the gear lacking gear having gear teeth, the center of the gear lacking gear being fixedly connected to the output of the power unit.
5. A rainfall drainage arrangement according to claim 1 wherein the wash mechanism comprises:
the brush is fixedly connected with the second cavity and used for cleaning the second filter screen; and
the spraying assembly is movably connected with the eccentric part of the missing gear at one end and is used for spraying the second filter screen to be matched with the hairbrush for cleaning.
6. A rainfall drainage arrangement according to claim 5 wherein the spray assembly comprises:
the water tank is fixedly connected with the second cavity, and clear water is filled in the water tank; and
one end of the water pumping component is movably connected with the eccentric part of the missing gear, and the other end of the water pumping component is hinged with the second cavity and used for pumping out clean water in the water tank for spraying.
7. A rainfall drainage structure as claimed in claim 1 wherein the end of the drainage port adjacent the ground is fixedly connected to a first filter.
8. A rainfall drainage structure of claim 1, wherein the second filter screen is provided with a scraping mechanism, the scraping mechanism comprising:
the scraping component is arranged on one side, close to the first filter screen, of the second filter screen and is used for scraping sundries on the second filter screen; and
the power assembly is arranged in the first cavity, is connected with one side of the scraping component and is used for driving the scraping component to move; and
the collecting assembly is arranged inside the body and used for collecting sundries.
9. A drainage apparatus comprising a rainfall drainage mechanism as claimed in claims 1 to 8, further comprising: the crushing mechanism is arranged in the collecting cavity and is used for crushing sundries; and the treatment mechanism is used for carrying out subsequent treatment on the crushed sundries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624100.1A CN113338412A (en) | 2021-06-04 | 2021-06-04 | Rainfall drainage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110624100.1A CN113338412A (en) | 2021-06-04 | 2021-06-04 | Rainfall drainage structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113338412A true CN113338412A (en) | 2021-09-03 |
Family
ID=77473903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110624100.1A Pending CN113338412A (en) | 2021-06-04 | 2021-06-04 | Rainfall drainage structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113338412A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108787A (en) * | 2021-12-11 | 2022-03-01 | 安徽华睿水利建设有限公司 | Waterproof drainage device is used in hydraulic engineering construction |
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| KR100905003B1 (en) * | 2008-12-08 | 2009-06-26 | 합자회사 우신엔지니어링 | Screen filter |
| CN108184614A (en) * | 2018-01-04 | 2018-06-22 | 郭巧明 | A kind of gardens irrigation equipment for collecting rainwater |
| CN208532499U (en) * | 2018-05-31 | 2019-02-22 | 江苏鼎昇环保科技有限公司 | A kind of water treatment facilities convenient for cleaning |
| CN110150256A (en) * | 2019-06-27 | 2019-08-23 | 马文驰 | A kind of afforestation rain collector |
| CN211312078U (en) * | 2019-12-18 | 2020-08-21 | 王延璞 | Drainage device for building engineering |
| CN112431293A (en) * | 2020-12-16 | 2021-03-02 | 徐飞 | Prevent stifled municipal drainage inspection shaft structure |
| CN213192657U (en) * | 2020-06-06 | 2021-05-14 | 宜兴市苏恒环保设备有限公司 | Self-cleaning filter |
-
2021
- 2021-06-04 CN CN202110624100.1A patent/CN113338412A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100905003B1 (en) * | 2008-12-08 | 2009-06-26 | 합자회사 우신엔지니어링 | Screen filter |
| CN108184614A (en) * | 2018-01-04 | 2018-06-22 | 郭巧明 | A kind of gardens irrigation equipment for collecting rainwater |
| CN208532499U (en) * | 2018-05-31 | 2019-02-22 | 江苏鼎昇环保科技有限公司 | A kind of water treatment facilities convenient for cleaning |
| CN110150256A (en) * | 2019-06-27 | 2019-08-23 | 马文驰 | A kind of afforestation rain collector |
| CN211312078U (en) * | 2019-12-18 | 2020-08-21 | 王延璞 | Drainage device for building engineering |
| CN213192657U (en) * | 2020-06-06 | 2021-05-14 | 宜兴市苏恒环保设备有限公司 | Self-cleaning filter |
| CN112431293A (en) * | 2020-12-16 | 2021-03-02 | 徐飞 | Prevent stifled municipal drainage inspection shaft structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114108787A (en) * | 2021-12-11 | 2022-03-01 | 安徽华睿水利建设有限公司 | Waterproof drainage device is used in hydraulic engineering construction |
| CN114108787B (en) * | 2021-12-11 | 2023-08-18 | 安徽华睿水利建设有限公司 | Waterproof drainage device for hydraulic engineering construction |
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Application publication date: 20210903 |