CN113198214A - Automatic cleaning device for effluent weir of radial-flow secondary sedimentation tank - Google Patents
Automatic cleaning device for effluent weir of radial-flow secondary sedimentation tank Download PDFInfo
- Publication number
- CN113198214A CN113198214A CN202110462304.XA CN202110462304A CN113198214A CN 113198214 A CN113198214 A CN 113198214A CN 202110462304 A CN202110462304 A CN 202110462304A CN 113198214 A CN113198214 A CN 113198214A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- motor
- reinforcing plate
- cleaning device
- sedimentation tank
- 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.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 39
- 238000004062 sedimentation Methods 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 27
- 230000001680 brushing effect Effects 0.000 claims abstract description 15
- 238000007790 scraping Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims 2
- 239000010865 sewage Substances 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0006—Settling tanks provided with means for cleaning and maintenance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2444—Discharge mechanisms for the classified liquid
Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to an automatic cleaning device for a radial flow type secondary sedimentation tank effluent weir, which comprises a fixing mechanism and a supporting and adjusting mechanism for adjusting effluent weirs at different heights, wherein the supporting and adjusting mechanism comprises an upright post, a hydraulic rod, a reinforcing plate, a centralized disc and a sleeve, the upright post is connected to the middle of the upper surface of the fixing mechanism through a bolt, and the reinforcing plate is arranged at the joint position of the upright post and the fixing mechanism. According to the automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank, the base of the device is stable and can be adjusted according to the heights of different effluent weirs through the arrangement of the reinforcing plate and the hydraulic rod; when the interior of the water outlet weir is cleaned, the scraping and brushing mechanism can be driven by the first motor to do circular motion to clean the interior; during cleaning, due to the arrangement of the two scrapers with different widths and the cleaning brush, mud on the inner wall can be scraped out more thoroughly.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an automatic cleaning device for an effluent weir of a radial flow type secondary sedimentation tank.
Background
The secondary sedimentation tank is an important component of an activated sludge system and mainly has the functions of separating sludge, clarifying mixed liquor, concentrating and refluxing activated sludge. The working effect can directly influence the effluent quality and the return sludge concentration of the activated sludge system. The large and medium-sized sewage treatment plants mostly adopt circular radial flow sedimentation tanks for mechanical sludge suction, the medium-sized sewage treatment plants also adopt multi-bucket horizontal flow sedimentation tanks, and the small sewage treatment plants mostly adopt vertical flow type. When the secondary sedimentation tank is used, more sludge and foreign matters can be stored on the upper part of the effluent weir, the traditional automatic cleaning device cannot be adjusted according to the height of the effluent weir, and the residual sludge is not thoroughly treated.
It is noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
Disclosure of Invention
In order to solve the problems in the prior art, the automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank, disclosed by the invention, has the advantages that the base of the device is stable and can be adjusted according to the heights of different effluent weirs through the arrangement of the reinforcing plate and the hydraulic rod; when the interior of the water outlet weir is cleaned, the scraping and brushing mechanism can be driven by the first motor to do circular motion to clean the interior; during cleaning, due to the arrangement of the two scrapers with different widths and the cleaning brush, mud on the inner wall can be scraped out more thoroughly.
In order to achieve the purpose, the invention adopts the following technical scheme:
the automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank comprises a fixing mechanism and a supporting and adjusting mechanism for adjusting the effluent weir according to different heights, wherein the supporting and adjusting mechanism comprises an upright post, a hydraulic rod, a reinforcing plate, a centralized disc and a sleeve, the upright post is connected to the middle of the upper surface of the fixing mechanism through a bolt, the reinforcing plate is installed at the joint position of the upright post and the fixing mechanism, the sleeve is sleeved outside the reinforcing plate, the hydraulic rod is connected to the surface of the sleeve, facing the reinforcing plate, through the bolt, the centralized disc is connected to the surface of the reinforcing plate, facing the sleeve, through the bolt, and the hydraulic rod penetrates through the centralized disc; one side of supporting adjustment mechanism is provided with scrapes mud and scrub brush mechanism to going out the water weir, scrape brush mechanism and include the second motor, bear dish, ball, first scraper, second scraper, cleaning brush, the output of second motor has through the coupling joint bear the dish, the inside of bearing the dish is provided with the ball, bear the dish and install towards the position of going out water weir bottom the cleaning brush, the cleaning brush orientation telescopic position department is provided with first scraper, the second scraper with the cleaning brush the second scraper be located same circle and with bear the dish and pass through bolted connection.
On the basis of the technical scheme, the fixing mechanism comprises a chassis and mounting holes, and six mounting holes are formed in the chassis.
On the basis of the technical scheme, actuating mechanism includes rolling disc, first motor, threaded lead screw, dog, thread bush, telescopic link, connecting block, connection rocking arm, the rolling disc dorsad telescopic position has through bolted connection has first motor, the output of first motor has through the coupling joint threaded lead screw, bolted connection has been passed through to threaded lead screw's one end the dog, the spiro union has on the threaded lead screw the thread bush, the thread bush orientation telescopic position is rotated and is connected with the connection rocking arm, first motor with the second motor all rotate on the surface and be connected with the connecting block, pass through between the connecting block the telescopic link is connected.
On the basis of the technical scheme, the hydraulic rods are arranged at three positions, and the reinforcing plates are symmetrical along the transverse axis of the reinforcing plates.
On the basis of the technical scheme, the rotating disc is connected with the sleeve through a bearing, and the connecting rocker arm is rotatably connected with the second motor.
On the basis of the technical scheme, the second scraper is wider than the first scraper.
Compared with the prior art, the invention has the beneficial effects that: according to the automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank, the base of the device is stable and can be adjusted according to the heights of different effluent weirs through the arrangement of the reinforcing plate and the hydraulic rod;
when the interior of the water outlet weir is cleaned, the scraping and brushing mechanism can be driven by the first motor to do circular motion to clean the interior;
during cleaning, due to the arrangement of the two scrapers with different widths and the cleaning brush, mud on the inner wall can be scraped out more thoroughly.
Additional features of the invention and advantages thereof will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is an isometric view of an automatic cleaning device for an effluent weir of a radial flow type secondary sedimentation tank;
FIG. 2 is a front view of an automatic cleaning device for an effluent weir of a radial flow type secondary sedimentation tank;
FIG. 3 is an isometric view of a scraping and brushing mechanism of an automatic cleaning device for an effluent weir of a radial flow type secondary sedimentation tank, according to the invention;
FIG. 4 is an isometric view of a supporting and adjusting mechanism of the automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank.
The reference numerals are explained below:
1. a fixing mechanism; 101. a chassis; 102. mounting holes; 2. a support adjustment mechanism; 201. a column; 202. a hydraulic lever; 203. a reinforcing plate; 204. a concentration disk; 205. a sleeve; 3. a drive mechanism; 301. rotating the disc; 302. a first motor; 303. a threaded lead screw; 304. a stopper; 305. a threaded sleeve; 306. a telescopic rod; 307. connecting blocks; 308. connecting a rocker arm; 4. a scraping and brushing mechanism; 401. a second motor; 402. a carrier tray; 403. a ball bearing; 404. a first scraper; 405. a second scraper; 406. and (4) cleaning brushes.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Examples
Referring to fig. 1-4, the present invention provides an automatic cleaning device for an effluent weir of a radial flow type secondary sedimentation tank, comprising: the device comprises a fixing mechanism 1 and a supporting and adjusting mechanism 2 which adjusts according to different heights of effluent weirs, wherein the supporting and adjusting mechanism 2 comprises an upright column 201, a hydraulic rod 202, a reinforcing plate 203, a centralized disc 204 and a sleeve 205, the upright column 201 is connected to the middle of the upper surface of the fixing mechanism 1 through a bolt, the reinforcing plate 203 is installed at the joint position of the upright column 201 and the fixing mechanism 1, the sleeve 205 is sleeved outside the reinforcing plate 203, the hydraulic rod 202 is connected to the surface, facing the reinforcing plate 203, of the sleeve 205 through a bolt, the centralized disc 204 is connected to the surface, facing the sleeve 205, of the reinforcing plate 203 through a bolt, and the hydraulic rod 202 penetrates through the centralized disc 204; one side of the supporting and adjusting mechanism 2 is provided with a scraping and brushing mechanism 4 for scraping and brushing mud on the water outlet weir, the scraping and brushing mechanism 4 comprises a second motor 401, a bearing disc 402, balls 403, a first scraper 404, a second scraper 405 and a cleaning brush 406, the output end of the second motor 401 is connected with the bearing disc 402 through a coupling, the balls 403 are arranged inside the bearing disc 402, the cleaning brush 406 is arranged at the position of the bearing disc 402 facing the bottom of the water outlet weir, the first scraper 404 is arranged at the position of the cleaning brush 406 facing the sleeve 205, and the second scraper 405, the cleaning brush 406 and the second scraper 405 are positioned on the same circle and are connected with the bearing disc 402 through bolts.
On the basis of the above-described embodiment: the fixing mechanism 1 comprises a base plate 101 and mounting holes 102, wherein six mounting holes 102 are formed in the base plate 101 and can be fixed with the bottom of the secondary sedimentation tank; the driving mechanism 3 comprises a rotating disc 301, a first motor 302, a threaded lead screw 303, a stop block 304, a threaded sleeve 305, an expansion link 306, a connecting block 307 and a connecting rocker arm 308, the position of the rotating disc 301, which is opposite to the sleeve 205, is connected with the first motor 302 through a bolt, the output end of the first motor 302 is connected with the threaded lead screw 303 through a coupler, so that the threaded sleeve 305 can move on the rod, one end of the threaded lead screw 303 is connected with the stop block 304 through a bolt to prevent the threaded sleeve 305 from derailing, the threaded sleeve 305 is screwed on the threaded lead screw 303, the threaded sleeve 305 is connected with the connecting rocker arm 308 in a rotating mode towards the sleeve 205, so that the component scraping and brushing mechanism 4 can be driven to act, the connecting blocks 307 are rotatably connected on the surfaces of the first motor 302 and the second motor 401, the connecting blocks 307 are connected through the expansion link 306, and the component scraping and brushing mechanism 4 is prevented from falling down; the hydraulic rods 202 are arranged at three positions, and the reinforcing plates 203 are symmetrical along the transverse axis of the reinforcing plates, so that the concentrating disc 204 cannot break when being fixed; the rotating disc 301 is connected with the sleeve 205 through a bearing, and the connecting rocker arm 308 is rotationally connected with the second motor 401; the second scraper 405 is wider than the first scraper 404 to further scrape mud off the upper portion of the effluent weir.
The working principle and the using process of the invention are as follows: when the automatic cleaning device is used, the installation hole 102 can be fixed, then the height of the component scraping and brushing mechanism 4 is adjusted by using the hydraulic rod 202 according to the height of the water outlet weir, then the threaded sleeve 305 can move linearly under the driving of the first motor 302, and then the connecting rocker arm 308 drives the component scraping and brushing mechanism 4 to move circularly in the fixed water outlet weir circular track, and meanwhile, the second motor 401 can drive the cleaning brush 406, the first scraper 404 and the second scraper 405 to scrape mud and clean the water outlet weir.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. The utility model provides a radial-flow type two heavy pond play weir self-cleaning device, includes fixed establishment (1), its characterized in that: the supporting and adjusting mechanism (2) is used for adjusting according to different heights of effluent weirs, the supporting and adjusting mechanism (2) comprises an upright post (201), a hydraulic rod (202), a reinforcing plate (203), a concentration disc (204) and a sleeve (205), the upright post (201) is connected to the middle of the upper surface of the fixing mechanism (1) through a bolt, the reinforcing plate (203) is installed at the joint position of the upright post (201) and the fixing mechanism (1), the sleeve (205) is sleeved outside the reinforcing plate (203), the hydraulic rod (202) is connected to the surface of the sleeve (205) facing the reinforcing plate (203) through a bolt, the concentration disc (204) is connected to the surface of the reinforcing plate (203) facing the sleeve (205) through a bolt, and the hydraulic rod (202) penetrates through the concentration disc (204);
a scraping and brushing mechanism (4) for scraping and brushing the mud of the water outlet weir is arranged at one side of the supporting and adjusting mechanism (2), the scraping and brushing mechanism (4) comprises a second motor (401), a bearing disc (402), balls (403), a first scraper (404), a second scraper (405) and a cleaning brush (406), the output end of the second motor (401) is connected with the bearing disc (402) through a coupling, the ball bearing (403) is arranged in the bearing disc (402), the washing brush (406) is arranged at the position of the bearing disc (402) facing the bottom of the water outlet weir, the first scraper (404) is arranged at the position of the washing brush (406) facing the sleeve (205), the second scraper (405) and the cleaning brush (406) and the second scraper (405) are positioned on the same circle and connected with the bearing disc (402) through bolts.
2. The automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank as claimed in claim 1, wherein: the fixing mechanism (1) comprises a chassis (101) and mounting holes (102), wherein six mounting holes (102) are formed in the chassis (101).
3. The automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank as claimed in claim 1, wherein: the driving mechanism (3) comprises a rotating disc (301), a first motor (302), a threaded lead screw (303), a stop block (304), a threaded sleeve (305), a telescopic rod (306), a connecting block (307) and a connecting rocker arm (308), wherein the position of the rotating disc (301), which faces away from the sleeve (205), is connected with the first motor (302) through a bolt, the output end of the first motor (302) is connected with the threaded lead screw (303) through a coupler, one end of the threaded lead screw (303) is connected with the stop block (304) through a bolt, the threaded sleeve (305) is screwed on the threaded lead screw (303), the position of the threaded sleeve (305) facing the sleeve (205) is rotationally connected with the connecting rocker arm (308), and the surfaces of the first motor (302) and the second motor (401) are rotationally connected with the connecting block (307), the connecting blocks (307) are connected through the telescopic rod (306).
4. The automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank as claimed in claim 1, wherein: the hydraulic rod (202) is provided with three positions in total, and the reinforcing plate (203) is symmetrical along the transverse axis of the reinforcing plate.
5. The automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank as claimed in claim 3, wherein: the rotating disc (301) is connected with the sleeve (205) through a bearing, and the connecting rocker arm (308) is rotatably connected with the second motor (401).
6. The automatic cleaning device for the effluent weir of the radial flow type secondary sedimentation tank as claimed in claim 1, wherein: the second blade (405) is wider than the first blade (404).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110462304.XA CN113198214B (en) | 2021-04-27 | 2021-04-27 | Automatic cleaning device for effluent weir of radial-flow secondary sedimentation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110462304.XA CN113198214B (en) | 2021-04-27 | 2021-04-27 | Automatic cleaning device for effluent weir of radial-flow secondary sedimentation tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113198214A true CN113198214A (en) | 2021-08-03 |
| CN113198214B CN113198214B (en) | 2022-05-27 |
Family
ID=77026906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110462304.XA Expired - Fee Related CN113198214B (en) | 2021-04-27 | 2021-04-27 | Automatic cleaning device for effluent weir of radial-flow secondary sedimentation tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113198214B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680112A (en) * | 2021-08-20 | 2021-11-23 | 同方水务集团有限公司 | Sewage treatment plant radial-flow type secondary sedimentation tank effluent weir automatic cleaning device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1152619A (en) * | 1965-12-23 | 1969-05-21 | Udo Passavant Ag | Sludge Rake for Settling Tank Sand Trap or the Like |
| CN205182275U (en) * | 2015-12-02 | 2016-04-27 | 安徽中环环保科技股份有限公司 | Self -cleaning formula bridge type mud scraper |
| CN110787500A (en) * | 2019-12-09 | 2020-02-14 | 湖州扬清环境科技有限公司 | Desilting device based on industrial wastewater treatment |
| CN112354223A (en) * | 2021-01-15 | 2021-02-12 | 山东锦绣山河环境工程有限公司 | Environment-friendly self-adaptive adjustment type sedimentation tank mud scraper |
| CN213001633U (en) * | 2020-06-01 | 2021-04-20 | 中原环保伊川水务有限公司 | Non-standard circle radial-flow type secondary sedimentation tank cleaning device |
-
2021
- 2021-04-27 CN CN202110462304.XA patent/CN113198214B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1152619A (en) * | 1965-12-23 | 1969-05-21 | Udo Passavant Ag | Sludge Rake for Settling Tank Sand Trap or the Like |
| CN205182275U (en) * | 2015-12-02 | 2016-04-27 | 安徽中环环保科技股份有限公司 | Self -cleaning formula bridge type mud scraper |
| CN110787500A (en) * | 2019-12-09 | 2020-02-14 | 湖州扬清环境科技有限公司 | Desilting device based on industrial wastewater treatment |
| CN213001633U (en) * | 2020-06-01 | 2021-04-20 | 中原环保伊川水务有限公司 | Non-standard circle radial-flow type secondary sedimentation tank cleaning device |
| CN112354223A (en) * | 2021-01-15 | 2021-02-12 | 山东锦绣山河环境工程有限公司 | Environment-friendly self-adaptive adjustment type sedimentation tank mud scraper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680112A (en) * | 2021-08-20 | 2021-11-23 | 同方水务集团有限公司 | Sewage treatment plant radial-flow type secondary sedimentation tank effluent weir automatic cleaning device |
| CN113680112B (en) * | 2021-08-20 | 2022-08-05 | 同方水务集团有限公司 | Sewage treatment plant radial-flow type secondary sedimentation tank effluent weir automatic cleaning device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113198214B (en) | 2022-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113198214B (en) | Automatic cleaning device for effluent weir of radial-flow secondary sedimentation tank | |
| CN112245979B (en) | High-efficient sedimentation tank convenient to clearance | |
| CN217204599U (en) | Effluent water sump self-cleaning drainage device | |
| CN217027245U (en) | Device for removing bottom mud of sewage tank | |
| CN110902757A (en) | Sewage treatment pond mud sediment collection limit remove device that floats | |
| CN213724979U (en) | Settling tank convenient for sediment cleaning | |
| CN201127858Y (en) | Automatic cleaning device of water-curtain type radial flow clarifying basin water-accumulating tank wall | |
| CN1206045C (en) | Automatic sweeping machine for dirt in the water cistern of the sewage disposal sedimentation tank | |
| CN209033832U (en) | It is a kind of for removing the mud scraper cantilever of gel-like foreign matters in sewage | |
| CN216062143U (en) | Go out mill weir cleaning device and mud scraper | |
| CN212680164U (en) | High-efficient integration sedimentation tank | |
| CN211035497U (en) | Sedimentation device for sewage treatment | |
| CN201135794Y (en) | Radial flow sedimentation tank scum bucket and scrum pipe automatic flushing device | |
| CN111592068A (en) | Integrated air floatation equipment | |
| CN213231642U (en) | Sedimentation tank with sealing device | |
| CN218574527U (en) | Elastic automatic compensation cleaning mechanism for cleaning secondary sedimentation tank | |
| CN206809840U (en) | A kind of mud scraper | |
| CN216062146U (en) | Rotary type automatic cleaning device for secondary sedimentation tank | |
| CN218280660U (en) | Swash plate clarification mud cleaning device | |
| CN219922245U (en) | Rainwater on-line filtering treatment device | |
| CN220346652U (en) | Realize hydraulic power tipping bucket self-cleaning equipment | |
| CN218306646U (en) | Backwashing device for rotary disc filter | |
| CN220237841U (en) | Novel sewage treatment coagulating sedimentation tank | |
| CN220899619U (en) | Submerged reciprocating mud scraper | |
| CN219002231U (en) | Sewage storage pool for urban water supply and drainage treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220527 |