CN219630829U - Sewage circulation treatment device for concrete processing - Google Patents
Sewage circulation treatment device for concrete processing Download PDFInfo
- Publication number
- CN219630829U CN219630829U CN202321078020.1U CN202321078020U CN219630829U CN 219630829 U CN219630829 U CN 219630829U CN 202321078020 U CN202321078020 U CN 202321078020U CN 219630829 U CN219630829 U CN 219630829U
- Authority
- CN
- China
- Prior art keywords
- sedimentation tank
- sewage
- water
- concrete processing
- treatment device
- Prior art date
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Filtration Of Liquid (AREA)
Abstract
The utility model provides a sewage circulation treatment device for concrete processing. The sewage circulation treatment device for concrete processing comprises: a sedimentation tank; the limiting grooves are respectively formed in the inner walls of the two sides of the sedimentation tank; the sewage draining groove is formed in the bottom of the sedimentation tank; the drain pipe is arranged at the bottom of the sedimentation tank and is communicated with the drain tank; the electric valve is arranged on the sewage drain pipe; the lifting mechanism is arranged on the sedimentation tank; the water taking mechanism is arranged on the lifting mechanism and is used for taking the water which is precipitated and purified in the sedimentation tank. The sewage circulation treatment device for concrete processing provided by the utility model has the advantages of auxiliary water taking function, sediment cleaning function and relatively convenient operation.
Description
Technical Field
The utility model relates to the technical field of concrete processing sewage treatment, in particular to a sewage circulation treatment device for concrete processing.
Background
In order to avoid water resource waste, more sewage can be generated in the concrete processing process, and the sewage generated in the concrete processing process needs to be treated, so that the sewage can be recycled, and the existing sewage recycling treatment device for concrete processing at present often adopts a precipitation method.
However, the existing sewage circulation treatment device for concrete processing often has no auxiliary water taking function, so that sediment at the bottom of the sedimentation tank can be pumped out during water taking, and the pumped water cannot be used.
Accordingly, there is a need to provide a sewage recycling apparatus for concrete processing that solves the above-mentioned problems.
Disclosure of Invention
The utility model provides a sewage circulation treatment device for concrete processing, which aims to solve the technical problem that sediment is easy to be pumped out when the existing sewage circulation treatment device for concrete processing pumps out water after sediment treatment.
The utility model provides a sewage circulation treatment device for concrete processing, which comprises: a sedimentation tank; the limiting grooves are respectively formed in the inner walls of the two sides of the sedimentation tank; the sewage draining groove is formed in the bottom of the sedimentation tank; the drain pipe is arranged at the bottom of the sedimentation tank and is communicated with the drain tank; the electric valve is arranged on the sewage drain pipe; the lifting mechanism is arranged on the sedimentation tank; the water taking mechanism is arranged on the lifting mechanism and is used for taking the water after precipitation and purification in the precipitation tank; the filtering mechanism is arranged at the top of the sedimentation tank and is used for filtering sewage generated in the concrete processing process; the dirt scraping mechanism is arranged on the sedimentation tank.
Preferably, the lifting mechanism comprises a plurality of longitudinal screws, lifting plates, a servo motor, a single-groove synchronizing wheel and a plurality of double-groove synchronizing wheels, wherein the longitudinal screws are respectively and rotatably arranged on the inner walls of the limiting grooves, the lifting plates are in threaded sleeves on the longitudinal screws, the servo motor is fixedly arranged at the top of the sedimentation tank, the single-groove synchronizing wheel is fixedly sleeved on an output shaft of the servo motor, the double-groove synchronizing wheels are respectively and fixedly sleeved on the longitudinal screws, and the single-groove synchronizing wheel and the double-groove synchronizing wheels are sleeved with a plurality of synchronizing belts.
Preferably, the water intake mechanism comprises a connecting rod, a cross plate, a turbidity detection sensor, a water pump and a water suction pipe, wherein the connecting rod is fixedly installed at the bottom of the lifting plate, the cross plate is fixedly installed at the bottom of the connecting rod, the turbidity detection sensor and the water pump are both arranged at the bottom of the cross plate, the water suction pipe is arranged at the water outlet end of the water pump, and one end of the water suction pipe extends to the outside of the sedimentation tank.
Preferably, the filtering mechanism comprises a filtering box, a rectangular opening, a baffle, a handle, a filtering frame and a filter screen, wherein the filtering box is fixedly installed at the top of the sedimentation tank, the rectangular opening is formed in one side of the filtering box, the baffle is slidably installed on the rectangular opening, the handle is fixedly installed on one side of the baffle, the filtering frame is fixedly installed on the other side of the baffle, and the filter screen is arranged at the bottom of the filtering frame.
Preferably, a controller is arranged at the top of the filter box, and the controller is electrically connected with the electric valve, the servo motor, the turbidity detection sensor and the water pump.
Preferably, a water inlet pipe and a water inlet pipe are arranged on the filter box, and an avoidance opening is formed in the lifting plate.
Preferably, the dirt scraping mechanism comprises a transverse screw rod, a plurality of limit rods, a scraping plate and a driving motor, wherein the transverse screw rod is rotatably installed on the inner wall of the sedimentation tank, the limit rods are fixedly installed on the inner wall of the sedimentation tank, the scraping plate is sleeved with threads on the transverse screw rod, the scraping plate is in sliding connection with the limit rods, the scraping plate is in sliding connection with the inner wall of the bottom of the sedimentation tank, the driving motor is fixedly installed on one side of the sedimentation tank, an output shaft of the driving motor is fixedly connected with the transverse screw rod, and the driving motor is electrically connected with the controller.
Compared with the related art, the sewage circulation treatment device for concrete processing provided by the utility model has the following beneficial effects:
the utility model provides a sewage circulation treatment device for concrete processing, which can control discharge of sediment through a sewage draining groove, a sewage draining pipe and a rear electric valve, can drive a water taking mechanism to move up and down through a lifting mechanism, can extract sewage after sedimentation treatment through the water taking mechanism, can prevent sediment from being extracted, can filter impurities in the sewage through a filtering mechanism, can clear sediment in a sedimentation tank through a scraping mechanism, can drive a lifting plate to move up and down through rotation of a plurality of longitudinal screws, can drive a plurality of longitudinal screws to rotate through rotation of a plurality of longitudinal screws, can drive a plurality of longitudinal screws through a servo motor, a single-groove synchronous wheel, a plurality of double-groove synchronous wheels and a plurality of synchronous belts, can monitor turbidity of water in the sedimentation tank through a turbidity detection sensor, can extract the water after sedimentation treatment through a water pump and a water pumping pipe, can filter impurities in the sewage through a filtering frame and a filtering screen, can operate and control the device through a controller, can discharge the sewage into the sedimentation tank through the filtering frame, and can drive a transverse screw to move through rotation of a driving motor.
Drawings
FIG. 1 is a schematic view of a sewage recycling apparatus for concrete processing according to a preferred embodiment of the present utility model;
FIG. 2 is a schematic three-dimensional view of the filtering mechanism of FIG. 1;
fig. 3 is an enlarged schematic view of a portion a shown in fig. 1.
Reference numerals in the drawings: 1. a sedimentation tank; 2. a limit groove; 3. a sewage draining groove; 4. a blow-down pipe; 5. an electric valve; 6. a longitudinal screw; 7. a lifting plate; 8. a servo motor; 9. a single groove synchronizing wheel; 10. double-groove synchronous wheels; 11. a connecting rod; 12. a cross plate; 13. a turbidity detection sensor; 14. a water pump; 15. a water pumping pipe; 16. a filter box; 17. a rectangular opening; 18. a baffle; 19. a handle; 20. a filter frame; 21. a filter screen; 22. a controller; 23. a water inlet pipe; 24. a water inlet pipe; 25. a transverse screw; 26. a limit rod; 27. a scraper; 28. and driving the motor.
Detailed Description
The utility model will be further described with reference to the drawings and embodiments.
Referring to fig. 1-3 in combination, fig. 1 is a schematic structural diagram of a sewage recycling apparatus for concrete processing according to a preferred embodiment of the present utility model; FIG. 2 is a schematic three-dimensional view of the filtering mechanism of FIG. 1; fig. 3 is an enlarged schematic view of a portion a shown in fig. 1. The sewage circulation treatment device for concrete processing comprises: a sedimentation tank 1; the limiting grooves 2 are respectively formed in the inner walls of the two sides of the sedimentation tank 1; a sewage draining tank 3, wherein the sewage draining tank 3 is arranged at the bottom of the sedimentation tank 1; the sewage draining pipe 4 is arranged at the bottom of the sedimentation tank 1, and the sewage draining pipe 4 is communicated with the sewage draining groove 3; an electric valve 5, wherein the electric valve 5 is arranged on the drain pipe 4; the lifting mechanism is arranged on the sedimentation tank 1; the water taking mechanism is arranged on the lifting mechanism and is used for taking the water which is precipitated and purified in the sedimentation tank 1; the filtering mechanism is arranged at the top of the sedimentation tank 1 and is used for filtering sewage generated in the concrete processing process; scrape dirty mechanism, scrape dirty mechanism setting and be in on the sedimentation tank 1, through blowdown groove 3, blow off pipe 4 then motorised valve 5 can control the discharge deposit, can drive water intaking mechanism through elevating system and reciprocate, not only can extract the sewage after the sedimentation treatment through water intaking mechanism to can prevent that the deposit from being taken out, can filter the impurity in the sewage through filtering mechanism, can clear up the deposit in the sedimentation tank 1 through scraping the mechanism.
The lifting mechanism comprises a plurality of longitudinal screws 6, lifting plates 7, a servo motor 8, a single-groove synchronizing wheel 9 and a plurality of double-groove synchronizing wheels 10, wherein the longitudinal screws 6 are respectively and rotatably arranged on the inner walls of the limiting grooves 2, the lifting plates 7 are in threaded sleeves on the longitudinal screws 6, the servo motor 8 is fixedly arranged at the top of the sedimentation tank 1, the single-groove synchronizing wheel 9 is fixedly sleeved on an output shaft of the servo motor 8, the double-groove synchronizing wheels 10 are respectively and fixedly sleeved on the longitudinal screws 6, the single-groove synchronizing wheel 9 and the double-groove synchronizing wheels 10 are sleeved with a plurality of synchronous belts, the lifting plates 7 can be driven to move up and down through rotation of the longitudinal screws 6, and the longitudinal screws 6 can be driven to rotate through the servo motor 8, the single-groove synchronizing wheel 9, the double-groove synchronizing wheels 10 and the synchronous belts.
The water taking mechanism comprises a connecting rod 11, a transverse plate 12, a turbidity detection sensor 13, a water pump 14 and a water suction pipe 15, wherein the connecting rod 11 is fixedly installed at the bottom of the lifting plate 7, the transverse plate 12 is fixedly installed at the bottom of the connecting rod 11, the turbidity detection sensor 13 and the water pump 14 are both arranged at the bottom of the transverse plate 12, the water suction pipe 15 is arranged at the water outlet end of the water pump 14, one end of the water suction pipe 15 extends to the outside of the sedimentation tank 1, the turbidity of water in the sedimentation tank 1 can be monitored through the turbidity detection sensor 13, and the water after sedimentation treatment can be pumped out through the water pump 14 and the water suction pipe 15.
The filtering mechanism comprises a filtering box 16, a rectangular opening 17, a baffle 18, a handle 19, a filtering frame 20 and a filter screen 21, wherein the filtering box 16 is fixedly installed at the top of the sedimentation tank 1, the rectangular opening 17 is formed in one side of the filtering box 16, the baffle 18 is slidably installed on the rectangular opening 17, the handle 19 is fixedly installed on one side of the baffle 18, the filtering frame 20 is fixedly installed on the other side of the baffle 18, the filter screen 21 is arranged at the bottom of the filtering frame 20, and impurities in sewage can be filtered through the filtering frame 20 and the filter screen 21.
The top of the filter box 16 is provided with a controller 22, the controller 22 is electrically connected with the electric valve 5, the servo motor 8, the turbidity detection sensor 13 and the water pump 14, and the device can be operated and controlled through the controller 22.
The filter tank 16 is provided with a water inlet pipe 23 and a water inlet pipe 24, the lifting plate 7 is provided with an avoidance opening, and sewage can be discharged into the sedimentation tank 1 through the filter tank 16 by the water inlet pipe 23 and the water inlet pipe 24.
The sewage scraping mechanism comprises a transverse screw 25, a plurality of limiting rods 26, a scraping plate 27 and a driving motor 28, wherein the transverse screw 25 is rotatably installed on the inner wall of the sedimentation tank 1, the limiting rods 26 are fixedly installed on the inner wall of the sedimentation tank 1, the scraping plate 27 is sleeved on the transverse screw 25 in a threaded mode, the scraping plate 27 is slidably connected with the limiting rods 26, the scraping plate 27 is slidably connected with the inner wall of the bottom of the sedimentation tank 1, the driving motor 28 is fixedly installed on one side of the sedimentation tank 1, an output shaft of the driving motor 28 is fixedly connected with the transverse screw 25, and the driving motor 28 is electrically connected with the controller 22, and the driving motor 28 drives the transverse screw 25 to rotate so as to drive the scraping plate 27 to transversely move.
The utility model provides a sewage circulation treatment device for concrete processing, which has the following working principle:
when the device is used, sewage generated in the concrete processing process is injected into the filter tank 16 through the water inlet pipe 23, impurities in the sewage are filtered through the filter frame 20 and the filter screen 21, the filtered sewage is injected into the sedimentation tank 1 along the water inlet pipe 24, then the sewage is waited for sedimentation in the sedimentation tank 1, the servo motor 8 is started after the sedimentation is finished, the servo motor 8 drives the plurality of longitudinal screws 6 to rotate through the single-groove synchronous wheel 9, the plurality of double-groove synchronous wheels 10 and the plurality of synchronous belts, the plurality of longitudinal screws 6 rotate to drive the lifting plate 7 to move downwards, the lifting plate 7 drives the turbidity detection sensor 13 and the water pump 14 to move downwards, the turbidity of water is monitored in the process of the downward movement of the turbidity detection sensor 13, when the turbidity detection sensor 13 monitors that the turbidity of the water is higher than a preset threshold value, the controller 22 controls the servo motor 8 to be closed, so that the water pump 14 is not lowered, sediment at the top of the sedimentation tank 1 is avoided, then the water pump 14 is started, the water after sedimentation treatment in the sedimentation tank 1 is discharged to the water pump 15 along the water pipe 15, and the water storage tank is convenient for recycling the water in the concrete processing process;
when the filter material in the filter frame 20 is required to be cleaned, the filter frame 20 is pulled out of the filter box 16 through the handle 19 and the baffle 18, so that the filter material in the filter frame 20 is cleaned;
after the water pumping is finished, the driving motor 28 is started, the driving motor 28 drives the transverse screw rod 25 to rotate, the transverse screw rod 25 rotates to drive the scraping plate 27 to move to one side, sediment on the inner wall of the bottom of the sedimentation tank 1 is scraped to the sewage draining tank 3 by the scraping plate 27 which moves to one side, then the electric valve 5 is opened, and the sediment in the sedimentation tank 1 is discharged by the sewage draining tank 3 and the sewage draining pipe 4.
Compared with the related art, the sewage circulation treatment device for concrete processing provided by the utility model has the following beneficial effects:
the utility model provides a sewage circulation treatment device for concrete processing, which can control sediment discharge through a sewage tank 3, a sewage pipe 4 and an electric valve 5, can drive a water taking mechanism to move up and down through a lifting mechanism, can extract sewage after sediment treatment through the water taking mechanism, can prevent sediment from being extracted, can filter impurities in the sewage through a filtering mechanism, can clear sediment in a sedimentation tank 1 through a scraping mechanism, can drive a lifting plate 7 to move up and down through rotation of a plurality of longitudinal screws 6, can drive a plurality of longitudinal screws 6 to rotate through a servo motor 8, a single-tank synchronizing wheel 9, a plurality of double-tank synchronizing wheels 10 and a plurality of synchronizing belts, can monitor turbidity of water in the sedimentation tank 1 through a turbidity detection sensor 13, can extract the water after sediment treatment through a water pump 14 and a water pumping pipe 15, can filter impurities in the sewage through a filtering frame 20 and a filtering screen 21, can operate and control the device through a controller 22, can drive a sewage filtering box 16 to move up and down through a water inlet pipe 23 and a water inlet pipe 24, can drive a plurality of longitudinal screws 16 to move transversely through a scraping plate 25 and can drive a scraper blade to move transversely through a driving motor 25.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (7)
1. A sewage circulation treatment device for concrete processing, comprising:
a sedimentation tank;
the limiting grooves are respectively formed in the inner walls of the two sides of the sedimentation tank;
the sewage draining groove is formed in the bottom of the sedimentation tank;
the drain pipe is arranged at the bottom of the sedimentation tank and is communicated with the drain tank;
the electric valve is arranged on the sewage drain pipe;
the lifting mechanism is arranged on the sedimentation tank;
the water taking mechanism is arranged on the lifting mechanism and is used for taking the water after precipitation and purification in the precipitation tank;
the filtering mechanism is arranged at the top of the sedimentation tank and is used for filtering sewage generated in the concrete processing process;
the dirt scraping mechanism is arranged on the sedimentation tank.
2. The sewage circulation treatment device for concrete processing according to claim 1, wherein the lifting mechanism comprises a plurality of longitudinal screws, lifting plates, a servo motor, a single-groove synchronizing wheel and a plurality of double-groove synchronizing wheels, the longitudinal screws are respectively rotatably installed on the inner walls of the limiting grooves, the lifting plates are in threaded sleeve arrangement on the longitudinal screws, the servo motor is fixedly installed on the top of the sedimentation tank, the single-groove synchronizing wheel is fixedly sleeved on an output shaft of the servo motor, the double-groove synchronizing wheels are respectively fixedly sleeved on the longitudinal screws, and the single-groove synchronizing wheel and the double-groove synchronizing wheels are sleeved with a plurality of synchronous belts.
3. The sewage circulation treatment device for concrete processing according to claim 2, wherein the water intake mechanism comprises a connecting rod, a cross plate, a turbidity detection sensor, a water pump and a water suction pipe, the connecting rod is fixedly installed at the bottom of the lifting plate, the cross plate is fixedly installed at the bottom of the connecting rod, the turbidity detection sensor and the water pump are both arranged at the bottom of the cross plate, the water suction pipe is arranged at the water outlet end of the water pump, and one end of the water suction pipe extends to the outside of the sedimentation tank.
4. The sewage circulation treatment device for concrete processing according to claim 3, wherein the filtering mechanism comprises a filtering box, a rectangular opening, a baffle, a handle, a filtering frame and a filter screen, the filtering box is fixedly installed at the top of the sedimentation tank, the rectangular opening is formed on one side of the filtering box, the baffle is slidably installed on the rectangular opening, the handle is fixedly installed on one side of the baffle, the filtering frame is fixedly installed on the other side of the baffle, and the filter screen is arranged at the bottom of the filtering frame.
5. The wastewater recycling treatment device for concrete processing according to claim 4, wherein a controller is arranged at the top of the filter box, and the controller is electrically connected with the electric valve, the servo motor, the turbidity detection sensor and the water pump.
6. The apparatus according to claim 4, wherein the filter tank is provided with a water inlet pipe and a water inlet pipe, and the lifting plate is provided with a relief opening.
7. The wastewater recycling treatment device for concrete processing according to claim 5, wherein the wastewater scraping mechanism comprises a transverse screw, a plurality of limiting rods, a scraping plate and a driving motor, the transverse screw is rotatably installed on the inner wall of the sedimentation tank, the limiting rods are fixedly installed on the inner wall of the sedimentation tank, the scraping plate is sleeved on the transverse screw in a threaded manner, the scraping plate is slidably connected with the limiting rods, the scraping plate is slidably connected with the inner wall of the bottom of the sedimentation tank, the driving motor is fixedly installed on one side of the sedimentation tank, an output shaft of the driving motor is fixedly connected with the transverse screw, and the driving motor is electrically connected with the controller.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202321078020.1U CN219630829U (en) | 2023-05-08 | 2023-05-08 | Sewage circulation treatment device for concrete processing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202321078020.1U CN219630829U (en) | 2023-05-08 | 2023-05-08 | Sewage circulation treatment device for concrete processing |
Publications (1)
Publication Number | Publication Date |
---|---|
CN219630829U true CN219630829U (en) | 2023-09-05 |
Family
ID=87810353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202321078020.1U Active CN219630829U (en) | 2023-05-08 | 2023-05-08 | Sewage circulation treatment device for concrete processing |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN219630829U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118420161A (en) * | 2024-05-08 | 2024-08-02 | 苏州无为环境科技有限公司 | A multi-dimensional catalytic oxidation device and an organic wastewater treatment system |
-
2023
- 2023-05-08 CN CN202321078020.1U patent/CN219630829U/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118420161A (en) * | 2024-05-08 | 2024-08-02 | 苏州无为环境科技有限公司 | A multi-dimensional catalytic oxidation device and an organic wastewater treatment system |
CN118420161B (en) * | 2024-05-08 | 2024-10-11 | 苏州无为环境科技有限公司 | Multidimensional catalytic oxidation equipment and organic wastewater treatment system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN218944552U (en) | Wastewater circulating and filtering device | |
CN219630829U (en) | Sewage circulation treatment device for concrete processing | |
CN212248447U (en) | Sedimentation tank desilting device for sewage treatment tank | |
CN112340885A (en) | Domestic sewage centralized pre-filtering equipment and using method thereof | |
CN208574340U (en) | A kind of wastewater treatment settler | |
CN215828586U (en) | Bury formula SCBR sewage treatment plant integratedly | |
CN213856150U (en) | Circulating water tank convenient to clean | |
CN212067894U (en) | A new type of wastewater treatment equipment | |
CN216713168U (en) | Hydraulic engineering construction river course desilting equipment | |
CN217567847U (en) | Sewage treatment device with silt clearance structure | |
CN219333262U (en) | A wastewater sedimentation treatment device | |
CN221535775U (en) | Filter tank back flush muddy water treatment device | |
CN220513648U (en) | Sewage treatment sedimentation tank | |
CN222204902U (en) | Energy-saving sedimentation tank for water treatment | |
CN217511235U (en) | Self-adjusting type waste water sediment removing device capable of avoiding sediment scaling | |
CN220424695U (en) | Filtering device with water resource recovery function | |
CN219529331U (en) | Anti-blocking submersible pump | |
CN220034173U (en) | Waste water purification and recycling device for regenerated plastic particle production | |
CN220182922U (en) | Sedimentation tank for environmental protection water treatment | |
CN220225687U (en) | Suction type underground sewage pool cleaning device | |
CN119118257B (en) | A multi-stage potato starch wastewater treatment equipment | |
CN221821965U (en) | A highly efficient wastewater treatment device | |
CN221459963U (en) | Filter tank cleaning system | |
CN216259281U (en) | Sedimentation tank for sewage treatment convenient to handle and deposit rubbish | |
CN219984157U (en) | Wastewater treatment mechanism for building construction |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |