CN114575435B - Rain and sewage diversion mechanism and diversion method for municipal pipeline - Google Patents
Rain and sewage diversion mechanism and diversion method for municipal pipeline Download PDFInfo
- Publication number
- CN114575435B CN114575435B CN202210268317.8A CN202210268317A CN114575435B CN 114575435 B CN114575435 B CN 114575435B CN 202210268317 A CN202210268317 A CN 202210268317A CN 114575435 B CN114575435 B CN 114575435B
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- pipe network
- sewage
- well
- rain
- rainwater
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- 239000010865 sewage Substances 0.000 title claims abstract description 57
- 230000007246 mechanism Effects 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000007790 scraping Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 description 9
- 239000000428 dust Substances 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/10—Dividing the first rain flush out of the stormwater flow
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
Abstract
The invention relates to the technical field of rain and sewage diversion, and discloses a rain and sewage diversion mechanism and a diversion method for municipal pipelines, wherein the diversion well assembly comprises a well body, a water inlet pipe network, a rainwater pipe network and a sewage pipe network which are respectively connected with the well body, a well cover is arranged at the top of the well body, a lifting mechanism is arranged at the top of the well cover, a control valve assembly is arranged at the telescopic end of the lifting mechanism, and the control valve assembly is in sliding connection with the inside of the well body; when the mechanism is at the highest point in the well body, the water inlet pipe network is controlled to be communicated with the rainwater pipe network, meanwhile, the sewage pipe network can be automatically closed, when the lowest point in the well body is controlled to be communicated with the sewage pipe network, meanwhile, the rainwater pipe network can be automatically closed, the mechanism can realize the diversion of the rainwater pipe network only by one valve body, the structure of the existing rainwater pipe network is greatly simplified, and the stability of the diversion mechanism is improved while the cost is reduced.
Description
Technical Field
The invention relates to the technical field of rain and sewage diversion, in particular to a rain and sewage diversion mechanism and a diversion method for municipal pipelines.
Background
Municipal sewage lines generally include branch, main and trunk pipes; because rain water does not need to be treated, and is typically discharged nearby into nearby bodies of water, the rain water piping typically includes branch and main pipes. The drainage pipeline has 6 arrangement forms of orthorhombic, interception type, flat type, zonal type, decentralized type and surrounding type according to the topography as a main consideration. The drainage pipeline is arranged according to the principle that sewage in the largest area can be discharged automatically under the condition of shorter pipeline and smaller burial depth as far as possible, and is generally carried out according to the sequence of a main pipe, a main pipe and a branch pipe.
The rain and sewage split flow is a drainage system, which is a drainage mode of separating rainwater and sewage, conveying the rainwater and the sewage by one pipeline respectively and discharging or carrying out subsequent treatment. Rainwater is directly discharged to a river channel through a rainwater pipe network, and sewage is collected through a sewage pipe network and then is sent to a sewage treatment plant for treatment, so that pollution caused by the fact that the sewage directly enters the river channel is avoided. And the rainwater is collected, utilized and centrally managed to be discharged, so that the impact of water quantity on a sewage treatment plant can be reduced, and the treatment efficiency of the sewage treatment plant is ensured.
In the prior art, the rain and sewage diversion equipment needs to realize the communication of three pipe networks, and the communication of three pipe networks needs three different valve bodies to divert, so that the cost is higher, the stability is poor, and the periodic maintenance is required.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a rain and sewage diversion mechanism and a diversion method for municipal pipelines, which have the advantages of low cost and high stability, and solve the problems of high cost and poor stability caused by the fact that three different valve bodies are required to conduct diversion in the communication of three pipe networks.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a rain sewage reposition of redundant personnel mechanism for municipal pipeline, includes the reposition of redundant personnel well subassembly, the reposition of redundant personnel well subassembly includes the well body and respectively rather than the pipe network that intakes, rainwater pipe network and the sewage pipe network of connecting, the top of the well body is equipped with the well lid, elevating system is installed at the top of well lid, elevating system's flexible end is equipped with the control valve subassembly, the control valve subassembly is in the inside sliding connection of the well body, when the control valve subassembly slides to the highest point, control intake pipe network with rainwater pipe network intercommunication, the control valve subassembly slides to the lowest point time, control intake pipe network with sewage pipe network intercommunication.
Preferably, the lifting mechanism comprises a driving part, a lifting rod is fixedly connected to the telescopic end of the driving part, and a sealing sleeve is sleeved at the joint of the lifting rod and the well cover.
Through adopting above-mentioned scheme, drive portion drives the lifting rod and rises or descend, makes the lifting rod drive the control valve subassembly again and goes up and down, in addition, through setting up the seal cover, when making the water on the lifting rod pass through the seal cover, can break away from automatically.
Preferably, the control valve assembly comprises an L-shaped valve body, and a filter screen is arranged on one side, close to the rainwater pipe network, of the top of the valve body.
Through adopting above-mentioned scheme, the valve body of L shape is when sliding to the minimum, can control the intercommunication of water inlet pipe net and rainwater pipe network, simultaneously, self-closing sewage pipe network, when the valve body of L shape slides to the maximum, control water inlet pipe net and sewage pipe network intercommunication, simultaneously, self-closing rainwater pipe network, in addition, the filter screen of setting can be in rainwater pipe network department automatically when rainwater pipe network is opened, makes the filter screen filter the quality of water of exhaust rainwater, promotes the direct drainage rainwater.
Preferably, the valve body is composed of a metal plate body and a rubber layer coated on the outer side of the metal plate body.
Through adopting above-mentioned scheme, the metal plate body guarantees the bulk strength of valve body, and outside cladding's rubber layer has good leakproofness, when closing, can promote the leakproofness of this mechanism.
Preferably, the inner side wall of the well body is provided with two limit rails for limiting the positions of the valve body and the filter screen.
Through adopting above-mentioned scheme, the spacing track is spacing to the slip track of valve body, avoids the valve body when sliding, appears deviating phenomenon to make the valve body can be inseparable laminating on the inside wall of mechanism, further promote the leakproofness of valve body.
Preferably, an ash scraping component for scraping accumulated sundries on the valve body is arranged in the well body, an ash falling groove is formed in the horizontal plane of the valve body, and an ash falling component is arranged in the ash falling groove.
Through adopting above-mentioned scheme, when the valve body rises to close the rainwater pipe network, the filter screen on the valve body rises, makes the ash scraping assembly who laminates with the filter screen strike off the impurity that the filter screen outside is piled up automatically, simultaneously, the ash falling assembly opens, makes the impurity of striking off arrange the sewage pipe network to the below by the ash falling groove, makes the impurity be discharged by the sewage pipe network.
Preferably, the ash scraping assembly comprises a supporting plate, the outer side wall of the supporting plate is fixedly connected with a hinging seat, a scraper is hinged to the hinging seat, one end of the scraper is attached to the outer side wall of the filter screen, and a pressing piece for pressing the scraper is arranged on the outer side wall of the supporting plate;
the ash falling component comprises an air cylinder, a push rod is fixedly connected to the telescopic end of the air cylinder, a baffle is fixedly connected to one end of the push rod, and the baffle is in sliding connection with the ash falling groove.
Through adopting above-mentioned scheme, when the filter screen rises, the lateral wall and the scraper contact of filter screen, make the scraper strike off the impurity on the filter screen under the effect of exerting the pressure piece, at this moment, the cylinder drives the baffle on the push rod and inwards moves, makes the baffle not block the ash chute, makes the impurity of striking off by the ash chute discharge.
A method of diversion of rain and sewage for municipal pipes comprising the steps of:
s1: arranging a weather instrument on a well, and judging weather conditions by using the weather instrument;
s2: in a non-rainy day, closing the rainwater pipe network to enable sewage to flow to the sewage pipe network through the mechanism;
s3: when raining, a rainwater pipe network is opened, so that rainwater can directly drain into a river through the mechanism;
s4: when the rainwater pipe network is closed or opened, the mechanism can clean the internal filter screen.
(III) beneficial effects
Compared with the prior art, the invention provides the rain and sewage diversion mechanism and the diversion method for the municipal pipeline, which have the following beneficial effects:
through setting up the well body, set up three port on the well body, wherein, with rainwater pipe network and sewage pipe network parallel arrangement each other, can be at the internal L shape valve body of oscilaltion of well in setting up, wherein, the perpendicular setting of L shape valve body is on the port of rainwater pipe network and sewage pipe network, makes this mechanism when the internal highest point of well, control the water inlet pipe network with rainwater pipe network intercommunication, simultaneously, but self-closing sewage pipe network, when the internal lowest point of well, control water inlet pipe network with sewage pipe network intercommunication, simultaneously, but self-closing rainwater pipe network makes this mechanism only need a valve body just can realize the reposition of redundant personnel of control rainwater pipe network, has simplified the structure of current rainwater pipe network greatly, in reduce cost, has still promoted the stability of reposition of redundant personnel mechanism.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of a diverter well according to the present invention, with the mechanism in a rainwater flow state;
FIG. 3 is a cross-sectional view of a diverter well according to the present invention wherein the mechanism is in a wastewater flow configuration;
FIG. 4 is a side view of a control valve of the present invention;
FIG. 5 is a bottom view of the control valve of the present invention;
fig. 6 is an enlarged view of area a of fig. 3 in the present invention.
In the figure: 10. a diverter well assembly; 11. a well body; 12. a water inlet pipe network; 13. a rainwater pipe network; 14. a sewage pipe network; 15. a well cover;
20. a lifting mechanism; 21. a driving section; 22. a lifting rod; 23. sealing sleeve;
30. a control valve assembly; 31. a valve body; 32. a filter screen; 33. an ash falling groove;
40. an ash scraping assembly; 41. a support plate; 42. a hinge base; 43. a scraper; 44. a pressurizing member;
50. an ash falling component; 51. a cylinder; 52. a push rod; 53. a baffle;
60. and a limit rail.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The utility model provides a rain and sewage reposition of redundant personnel mechanism for municipal pipeline, including reposition of redundant personnel well subassembly 10, reposition of redundant personnel well subassembly 10 includes well body 11 and respectively rather than the water inlet pipe network 12 that connects, rainwater pipe network 13 and sewage pipe network 14, the top of well body 11 is equipped with well lid 15, elevating system 20 is installed at the top of well lid 15, elevating system 20 includes drive portion 21, the telescopic end fixedly connected with lifting rod 22 of drive portion 21, the junction cover of lifting rod 22 and well lid 15 is equipped with seal cover 23, the telescopic end of elevating system 20 is equipped with control valve subassembly 30, control valve subassembly 30 includes valve body 31 that is L shape, valve body 31 comprises the sheet metal body and cladding at its outside rubber layer, one side that is close to rainwater pipe network 13 at the top of valve body 31 is equipped with filter screen 32, control valve subassembly 30 is at the inside sliding connection of well body 11, when control valve subassembly 30 slides to the nadir, control water inlet pipe network 12 and sewage pipe network 14 intercommunication, the inside wall of well body 11 is equipped with two spacing tracks 60 that are used for restricting valve body 31 and 32 position.
Referring to fig. 1 to 6, a weather meter is disposed on a well, the weather condition is determined by the weather meter, in a non-rainy day, the driving part 21 drives the lifting rod 22 to rise, so that the lifting rod 22 drives the valve body 31 to move to the highest point in the well body 11, when the L-shaped valve body 31 slides to the highest point, the water inlet pipe network 12 and the sewage pipe network 14 are controlled to be communicated, meanwhile, the rainwater pipe network 13 is automatically closed, sewage flows to the sewage pipe network through the mechanism, in rainy days, the driving part 21 drives the lifting rod 22 to descend, so that the lifting rod 22 drives the valve body 31 to move to the lowest point in the well body 11, when the L-shaped valve body 31 slides to the lowest point, the communication between the water inlet pipe network 12 and the rainwater pipe network 13 can be controlled, meanwhile, the sewage pipe network 14 is automatically closed, so that rainwater can be discharged through the mechanism, in addition, when the rainwater pipe network 13 is opened, the filter 32 filters the discharged rainwater, and the water quality of the rainwater is improved.
Example two
The function of automatically scraping the impurities is added on the basis of the first embodiment.
The inside of the well body 11 is provided with a scraping component 40 for scraping sundries accumulated on the valve body 31, the horizontal surface of the valve body 31 is provided with a dust falling groove 33, the dust falling groove 33 is internally provided with a dust falling component 50, the scraping component 40 comprises a supporting plate 41, the outer side wall of the supporting plate 41 is fixedly connected with a hinging seat 42, the hinging seat 42 is hinged with a scraper 43, one end of the scraper 43 is attached to the outer side wall of the filter screen 32, and the outer side wall of the supporting plate 41 is provided with a pressing piece 44 for pressing the scraper 43;
the ash dropping component 50 comprises an air cylinder 51, a push rod 52 is fixedly connected to the telescopic end of the air cylinder 51, a baffle 53 is fixedly connected to one end of the push rod 52, and the baffle 53 is slidably connected with the ash dropping groove 33.
Referring to fig. 1 to 6, when the valve body 31 is lifted to close the rainwater pipe network 13, the filter screen 32 on the valve body 31 is lifted, and when the filter screen 32 is lifted, the outer side wall of the filter screen 32 is contacted with the scraper 43, so that the scraper 43 scrapes off impurities on the filter screen 32 under the action of the pressing piece 44, at this time, the air cylinder 51 drives the baffle 53 on the push rod 52 to move inwards, so that the baffle 53 does not block the dust falling groove 33, the scraped impurities are discharged from the dust falling groove 33 to the sewage pipe network 14 below, and the impurities are discharged from the sewage pipe network 14.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a rain and sewage reposition of redundant personnel mechanism for municipal pipeline, includes reposition of redundant personnel well subassembly (10), reposition of redundant personnel well subassembly (10) include well body (11) and respectively rather than being connected inlet pipe net (12), rainwater pipe net (13) and sewage pipe net (14), the top of well body (11) is equipped with well lid (15), its characterized in that: the top of the well cover (15) is provided with a lifting mechanism (20), the telescopic end of the lifting mechanism (20) is provided with a control valve assembly (30), the control valve assembly (30) is in sliding connection with the inside of the well body (11), when the control valve assembly (30) slides to the lowest point, the water inlet pipe network (12) is controlled to be communicated with the rainwater pipe network (13), and when the control valve assembly (30) slides to the highest point, the water inlet pipe network (12) is controlled to be communicated with the sewage pipe network (14);
an ash scraping component (40) for scraping sundries accumulated on the valve body (31) is arranged in the well body (11), an ash falling groove (33) is formed in the horizontal plane of the valve body (31), and an ash falling component (50) is arranged in the ash falling groove (33); the ash scraping assembly (40) comprises a supporting plate (41), the outer side wall of the supporting plate (41) is fixedly connected with a hinging seat (42), a scraper (43) is hinged to the hinging seat (42), one end of the scraper (43) is attached to the outer side wall of the filter screen (32), and a pressing piece (44) for pressing the scraper (43) is arranged on the outer side wall of the supporting plate (41);
the ash falling component (50) comprises an air cylinder (51), a push rod (52) is fixedly connected to the telescopic end of the air cylinder (51), a baffle plate (53) is fixedly connected to one end of the push rod (52), and the baffle plate (53) is in sliding connection with the ash falling groove (33).
2. A rain and sewage diversion mechanism for municipal pipelines according to claim 1, wherein: the lifting mechanism (20) comprises a driving part (21), a lifting rod (22) is fixedly connected to the telescopic end of the driving part (21), and a sealing sleeve (23) is sleeved at the joint of the lifting rod (22) and the well cover (15).
3. A rain and sewage diversion mechanism for municipal pipelines according to claim 1, wherein: the control valve assembly (30) comprises an L-shaped valve body (31), and a filter screen (32) is arranged on one side, close to the rainwater pipe network (13), of the top of the valve body (31).
4. A rain and sewage diversion mechanism for municipal pipes according to claim 3, wherein: the valve body (31) is composed of a metal plate body and a rubber layer coated on the outer side of the metal plate body.
5. A rain and sewage diversion mechanism for municipal pipes according to claim 3, wherein: the inner side wall of the well body (11) is provided with two limit rails (60) for limiting the positions of the valve body (31) and the filter screen (32).
6. A method of diverting rain and sewage for municipal pipes according to any of claims 1-5, comprising the steps of:
s1: arranging a weather instrument on a well, and judging weather conditions by using the weather instrument;
s2: in a non-rainy day, closing the rainwater pipe network to enable sewage to flow to the sewage pipe network through the mechanism;
s3: when raining, a rainwater pipe network is opened, so that rainwater can directly drain into a river through the mechanism;
s4: when the rainwater pipe network is closed or opened, the mechanism can clean the internal filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210268317.8A CN114575435B (en) | 2022-03-18 | 2022-03-18 | Rain and sewage diversion mechanism and diversion method for municipal pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210268317.8A CN114575435B (en) | 2022-03-18 | 2022-03-18 | Rain and sewage diversion mechanism and diversion method for municipal pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114575435A CN114575435A (en) | 2022-06-03 |
| CN114575435B true CN114575435B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210268317.8A Active CN114575435B (en) | 2022-03-18 | 2022-03-18 | Rain and sewage diversion mechanism and diversion method for municipal pipeline |
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| Country | Link |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11217867A (en) * | 1998-01-30 | 1999-08-10 | Takiron Co Ltd | Left-right combination bent pit |
| JP2011038295A (en) * | 2009-08-10 | 2011-02-24 | Asahi Kasei Homes Co | Rainwater drainage structure |
| CN107476417A (en) * | 2017-08-02 | 2017-12-15 | 青岛环境工程设计院有限公司 | A kind of rain dirt separator for discharge outlet well |
| CN107558569A (en) * | 2017-09-30 | 2018-01-09 | 武汉圣禹排水系统有限公司 | A kind of separate sewage system and control method of sewage and rainwater |
| CN207776055U (en) * | 2017-11-06 | 2018-08-28 | 重庆利迪现代水技术设备有限公司 | Buried roofing, ground rainwater reuse purification system |
| CN209636937U (en) * | 2018-12-14 | 2019-11-15 | 安徽汉威环境科技有限公司 | A kind of intelligent shunting well for rain sewage diversion |
| CN111335437A (en) * | 2020-02-24 | 2020-06-26 | 生态环境部南京环境科学研究所 | Shunt system for controlling sewage and initial rainwater pollution |
| CN213539226U (en) * | 2020-09-02 | 2021-06-25 | 中建三局集团有限公司 | Automatic control device for combined overflow pollution distribution |
-
2022
- 2022-03-18 CN CN202210268317.8A patent/CN114575435B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11217867A (en) * | 1998-01-30 | 1999-08-10 | Takiron Co Ltd | Left-right combination bent pit |
| JP2011038295A (en) * | 2009-08-10 | 2011-02-24 | Asahi Kasei Homes Co | Rainwater drainage structure |
| CN107476417A (en) * | 2017-08-02 | 2017-12-15 | 青岛环境工程设计院有限公司 | A kind of rain dirt separator for discharge outlet well |
| CN107558569A (en) * | 2017-09-30 | 2018-01-09 | 武汉圣禹排水系统有限公司 | A kind of separate sewage system and control method of sewage and rainwater |
| CN207776055U (en) * | 2017-11-06 | 2018-08-28 | 重庆利迪现代水技术设备有限公司 | Buried roofing, ground rainwater reuse purification system |
| CN209636937U (en) * | 2018-12-14 | 2019-11-15 | 安徽汉威环境科技有限公司 | A kind of intelligent shunting well for rain sewage diversion |
| CN111335437A (en) * | 2020-02-24 | 2020-06-26 | 生态环境部南京环境科学研究所 | Shunt system for controlling sewage and initial rainwater pollution |
| CN213539226U (en) * | 2020-09-02 | 2021-06-25 | 中建三局集团有限公司 | Automatic control device for combined overflow pollution distribution |
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| Publication number | Publication date |
|---|---|
| CN114575435A (en) | 2022-06-03 |
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