CN112076516A - Overflow type spiral self-compaction water filter - Google Patents
Overflow type spiral self-compaction water filter Download PDFInfo
- Publication number
- CN112076516A CN112076516A CN202011038838.1A CN202011038838A CN112076516A CN 112076516 A CN112076516 A CN 112076516A CN 202011038838 A CN202011038838 A CN 202011038838A CN 112076516 A CN112076516 A CN 112076516A
- Authority
- CN
- China
- Prior art keywords
- spiral
- compacting
- propelling
- screw
- filtering
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000005056 compaction Methods 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 53
- 239000000428 dust Substances 0.000 claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 3
- 239000010865 sewage Substances 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000012535 impurity Substances 0.000 description 15
- 239000010842 industrial wastewater Substances 0.000 description 11
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
- B01D29/035—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting with curved filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/82—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
- B01D29/828—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression using screws
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides an overflow type spiral self-compacting water filter which comprises a convergent-divergent overflow port, a spiral filtering and compacting device, a motor direct-coupled worm gear speed reducer, a rubber compacting damper, a dirt collecting hopper and a spiral propelling compactor bracket, wherein the motor direct-coupled worm gear speed reducer is connected with the motor direct-coupled worm gear speed reducer; wherein, the spiral filtering and compacting device is arranged at the lower part of the retractable overflow port; the spiral filtering and compacting device is arranged at the upper part of the spiral propelling compactor bracket; one end of the spiral propelling compactor bracket is connected with a motor direct-connection worm and gear speed reducer; the other end of the spiral filtering and compacting device is provided with a rubber compacting damper; the dirt collecting hopper is hung on the spiral filtering and compacting device and is positioned at the lower part of the outlet of the rubber compacting damper. The invention has simple structure and reliable operation, integrates water collection filtration and dust collection compaction, reduces the operation resistance and fault of sewage filtration, can improve the water filtration effect and reduce the energy consumption.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to an overflow type spiral self-compaction water filter.
Background
In the processes of sewage treatment and industrial wastewater treatment, sewage or industrial wastewater needs to be filtered, but the conventional water filter structure generally comprises a rotary screen cylinder, a speed reducer, a flushing device, a dust and impurity collecting device and the like. After sewage or industrial wastewater passes through the rotary screen drum and is filtered by the filter screen on the surface of the screen drum, dust and impurities are accumulated on the filter screen and then flushed into the dust and impurities collecting device by the flushing device. The main models are respectively an external filtering type and an internal filtering type.
When the water filter is used for filtering sewage or industrial wastewater, the wastewater passes through a filter screen of the water filter rotating net cylinder by virtue of the height difference of the inner surface and the outer surface of the water filter rotating net cylinder, dust and impurities are accumulated on the filter screen, and clean water enters a clean water tank and is sucked or discharged by a water pump. The dust on the filter screen is flushed or brushed into the dust collecting device by a flushing device (external filtering type) or a brush (internal filtering type), and the dust needs to be cleaned manually and periodically. The actual effective filtering area is small, the running resistance is large, the number of faults is large, the energy consumption is high, and the effect is poor.
The dust and impurities flushed or brushed into the dust and impurities collecting device by the flushing device (external filtering type) or the hairbrush (internal filtering type) are fluffy, the water content is high, the collection and the treatment are inconvenient, the fault and the parking of the water filter are often caused due to untimely collection, and the dust and impurities fall into the water pool or the water tank to cause secondary pollution. Affecting the quality of sewage treatment and the reuse of industrial wastewater. The operation failure of industrial equipment is caused, the energy efficiency ratio is reduced, and even accidents are caused by parking. The existing water filter structure does not have the dust and impurity compacting function, the collection treatment is in a fluffy state, the dust and impurity effect with a large water content is poor, and the labor capacity is large. The existing water filter structure has poor effect of treating dust impurities on the water surface due to the limited filtering area of the rotary filter screen, and the dust impurities often float above the water surface of the sewage tank and are difficult to collect and filter.
Therefore, for overcoming prior art's not enough, provide an overflow formula spiral from compaction water filter, simple structure, operation are reliable, and water filtration collects the compaction integration with the dirt, reduce sewage filtration running resistance and trouble, improve water filter effect, reduce the energy consumption and the problem that technical staff in the field need solve urgently.
Disclosure of Invention
Based on at least one of the technical problems, the invention provides the overflow type spiral automatic compaction water filter which has the advantages of simple structure, reliable operation and integrated treatment of water filtration and dust and impurity collection and compaction, can effectively reduce the running resistance and fault of sewage filtration, improve the water filtration effect, reduce the energy consumption and realize the integration and automation of sewage filtration, dust and impurity collection and compaction.
In view of the above, the invention provides an overflow type spiral self-compacting water filter, which comprises a contraction-expansion type overflow port, a spiral filtering and compacting device, a motor direct-connection worm gear speed reducer, a rubber compacting damper, a dirt collecting hopper and a spiral propelling compactor bracket, wherein the contraction-expansion type overflow port is provided with a water inlet pipe and a water outlet pipe;
wherein, the spiral filtering and compacting device is arranged at the lower part of the retractable overflow port; the spiral filtering and compacting device is arranged at the upper part of the spiral propelling compactor bracket; one end of the spiral propelling compactor bracket is connected with a motor direct-connection worm and gear speed reducer; the other end of the spiral filtering and compacting device is provided with a rubber compacting damper; the dirt collecting hopper is hung on the spiral filtering and compacting device and is positioned at the lower part of the outlet of the rubber compacting damper.
Further, the spiral filtering and compacting device comprises a cylindrical grating volute component, a tapered propelling screw rod, an arc-shaped hole plate type filter screen plate, a spiral propelling compactor end plate and an outlet end bearing frame;
wherein, the zooming overflow port is arranged on the cylindrical grid volute component; the cylindrical grid volute component is arranged above the spiral propelling compactor bracket; the arc-shaped orifice plate type filter screen plate is arranged at the upper part in the cylindrical grid volute component and is positioned below the retractable overflow port; the tapered propelling screw rod is installed in the cylindrical grid volute component, one end of the tapered propelling screw rod is connected with a motor direct-connection worm and gear speed reducer key through a spiral propelling compactor end plate, and the other end of the tapered propelling screw rod is fixed in an outlet end bearing frame.
Sewage and industrial wastewater sequentially pass through the zoom overflow port, enter the spiral filtering and compacting device, are filtered through an arc-shaped hole plate type filtering screen plate arranged on the cylindrical grid volute component, clean water is discharged through a grid at the lower part of the cylindrical grid volute component, and separated dust and impurities are compacted through the tapered propelling screw and then are discharged into the dirt dust collecting hopper through the rubber compacting damper.
Further, the cylindrical grid volute component comprises an opening section structure and a closing section structure; wherein the opening section structure is a grid structure with a wide upper part and a narrow lower part; the closed section structure is a cylinder structure; the arc-shaped pore plate type filter screen plate is arranged at the upper part in the opening section structure.
Sewage and industrial wastewater pass through an opening section structure of a cylindrical grating volute component, are filtered by an arc-shaped orifice plate type filter screen plate, and clean water is discharged through a grating at the lower part of the opening section structure; the separated dust is pushed into a closed section structure of the cylindrical grid volute component through a tapered propelling screw, compacted by the aid of a tapered screw pitch screw and then discharged into a dirt dust collecting hopper through a rubber compaction damper.
Further, the arc-shaped pore plate type filter screen plate is a stainless steel pore plate and is installed inside the opening section structure by adopting an insertion quick-opening structure.
Further, the tapered propelling screw comprises a propelling section screw and a compacting section screw; wherein the screw of the propelling section has equal screw pitch, and the edge is additionally provided with a brush structure; the screw of the compaction section has a gradually reduced screw pitch.
Further, the screw of the propelling section is arranged in the opening section structure; the compaction section screw rod is arranged in the closed section structure.
Preferably, the compacting section screw is adapted to the cylindrical configuration of the closing section configuration of the cylindrical grid volute assembly.
During the filtering process, dust and impurities collected by the arc-shaped hole plate type filter screen plate are cleaned and brushed through the hairbrush structure, then pushed into the cylinder with the closed section structure through the pushing section screw rod, and then pushed into the rubber compaction damper through the compaction section screw rod for discharging.
Furthermore, the zooming overflow port is of a bidirectional zooming dustpan type structure and is connected to an opening section structure of the cylindrical grating volute component.
One end of the convergent-divergent overflow port is connected to the upper part of the opening section structure of the cylindrical grid volute component through a flange; the other end is arranged below the water surface of the upper part of the wall of the sewage pool (water tank). Wherein the formula of zooming overflow mouth is two-way dustpan type structure of zooming, and the sewage in the sewage pond is collected through upper portion dustpan overflow mouth, flows into cylindrical grating spiral case subassembly upper portion through the mouth of zooming of downward slope, and the even STREAMING that tiles flows into cylindrical grating spiral case subassembly, filters through arc orifice plate formula filter screen.
Furthermore, the rubber compaction damper is of a rubber tapered structure and is connected to a closed section structure of the cylindrical grid volute component through a flange; the dirt dust collecting hopper is connected to the closed section structure of the cylindrical grid volute component through a flange.
Wherein, the dirt dust collecting hopper is connected with the outer side of the flange and is structurally connected with the closed section of the cylindrical grid volute component.
Through the technical scheme, the invention provides an overflow type spiral self-compaction water filter, which has the following advantages:
the invention filters sewage and industrial wastewater, has the functions of automatically filtering, compacting and collecting sewage or industrial wastewater, has reliable operation, less faults, good filtering effect, small operation resistance and low energy consumption, realizes the integration of filtering, compacting and collecting sewage, can better improve the water filtering effect and is convenient for installation and management.
Drawings
Fig. 1 is a schematic structural diagram of a overflow type spiral compaction water filter provided by the invention.
Fig. 2 is a schematic view of the installation of a flooded spiral compacted water filter provided by the present invention.
Fig. 3 is a schematic structural diagram of a cylindrical grid volute assembly provided by the invention.
FIG. 4 is a top view of a cylindrical grid volute assembly provided by the present invention.
Figure 5 is a left side view of a cylindrical grid volute assembly provided by the present invention.
Fig. 6 is a schematic view of a tapered propelling screw according to the present invention.
Fig. 7 is a schematic view of a zoom overflow port structure provided in the present invention.
FIG. 8 is a left side view of the zoom overflow provided by the present invention.
The device comprises a telescopic overflow port 1, a spiral filtering and compacting device 2, a motor direct-coupled worm and gear speed reducer 3, a rubber compacting damper 4, a dirt collecting hopper 5, a spiral propelling compactor support 6, a cylindrical grid volute component 21, a tapered propelling screw 22, an arc-shaped hole plate type filter screen plate 23, a spiral propelling compactor end plate 24, an outlet end bearing frame 25 and a brush structure 7.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail with reference to specific embodiments. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The invention provides an overflow type spiral self-compacting water filter, which is used for filtering sewage and industrial wastewater, has the functions of automatically filtering, compacting and collecting the sewage or the industrial wastewater, is reliable in operation, less in fault, good in filtering effect, small in operation resistance and low in energy consumption, realizes integration of filtering, compacting and collecting the sewage, can better improve the water filtering effect, is convenient to install and manage, and has the structure shown in figures 1-8.
1-8, the invention provides an overflow type spiral self-compacting water filter, which comprises a convergent-divergent overflow port 1, a spiral filtering and compacting device 2, a motor direct-coupled worm gear speed reducer 3, a rubber compacting damper 4, a dirt collecting hopper 5 and a spiral propelling compactor bracket 6;
wherein, the spiral filtering and compacting device 2 is arranged at the lower part of the convergent-divergent overflow port 1; the spiral filtering and compacting device 2 is arranged at the upper part of the spiral propelling and compacting device bracket 6; one end of the screw propelling compactor bracket 6 is connected with a motor direct-connection worm and gear speed reducer 3; the other end of the spiral filtering compaction device 2 is provided with a rubber compaction damper 4; the dirt collecting hopper 5 is externally hung on the spiral filtering and compacting device 2 and is positioned at the lower part of the outlet of the rubber compacting damper 4.
The spiral filtering and compacting device 2 comprises a cylindrical grid volute component 21, a tapered propelling screw 22, an arc-shaped hole plate type filter screen plate 23, a spiral propelling compactor end plate 24 and an outlet end bearing frame 25;
wherein, the zooming overflow port 1 is arranged on the cylindrical grid volute component 21; the cylindrical grid volute component 21 is arranged above the screw propulsion compactor bracket 6; the arc-shaped orifice plate type filter screen plate 23 is arranged at the upper part in the cylindrical grid volute component 21 and is positioned below the retractable overflow port 1; the tapered propelling screw 22 is arranged in the cylindrical grid volute component 21, one end of the tapered propelling screw is connected with a 3-key of a direct-connection worm and gear speed reducer of a motor through a spiral propelling compactor end plate 24, and the other end of the tapered propelling screw is fixed in an outlet end bearing frame 25.
In order to further optimize the technical scheme, the cylindrical grating volute component 21 comprises an opening section structure and a closing section structure; wherein the opening section structure is a grid structure with a wide upper part and a narrow lower part; the closed section structure is a cylinder structure; the arc-shaped orifice plate type filter screen plate 23 is arranged at the upper part in the opening section structure.
For further optimizing the technical scheme, the arc-shaped pore plate type filter screen plate 23 is a stainless steel pore plate and is arranged in the opening section structure by adopting an insertion quick-opening structure.
For further optimizing the technical scheme, the tapered propelling screw 22 comprises a propelling section screw and a compacting section screw; wherein the screw of the propelling section has equal screw pitch, and the edge is additionally provided with a brush structure 7; the screw of the compaction section has a gradually reduced screw pitch.
The technical proposal is further optimized, and the screw of the propelling section is arranged in the opening section structure; the compaction section screw rod is arranged in the closed section structure.
In order to further optimize the technical scheme, the retractable overflow port 1 is in a bidirectional retractable dustpan type structure and is connected to an opening section structure of the cylindrical grid volute component 21.
The rubber compaction damper 4 is of a rubber tapered structure and is connected to a closed section structure of the cylindrical grid volute component 21 through a flange; the dirt-collecting bucket 5 is connected to the closed section structure of the cylindrical grid volute component 21 through a flange.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an overflow formula spiral is from compaction water filter which characterized in that: the device comprises a convergent-divergent overflow port, a spiral filtering and compacting device, a motor direct-coupled worm gear speed reducer, a rubber compacting damper, a dirt collecting hopper and a spiral propelling compactor bracket;
wherein, the spiral filtering and compacting device is arranged at the lower part of the convergent-divergent overflow port; the spiral filtering and compacting device is arranged at the upper part of the spiral propelling and compacting device bracket; one end of the spiral propelling compactor support is connected with a motor direct-connection worm and gear speed reducer; the other end of the spiral filtering and compacting device is provided with a rubber compacting damper; the dirt collecting hopper is hung outside the spiral filtering and compacting device and is positioned at the lower part of the outlet of the rubber compacting damper.
2. A flooded spiral self-compacting water filter as claimed in claim 1, wherein the spiral filter compactor includes a cylindrical grate volute assembly, a tapered pusher screw, an arc orifice plate filter screen, a spiral pusher compactor end plate and an outlet end bearing bracket;
wherein the convergent-divergent overflow port is provided on the cylindrical grille-volute assembly; the cylindrical grid volute assembly is disposed above the screw-in compactor support; the arc-shaped orifice plate type filter screen plate is arranged at the upper part in the cylindrical grid volute component and is positioned below the retractable overflow port; the tapered propelling screw rod is installed in the cylindrical grid volute component, one end of the tapered propelling screw rod is connected with a motor direct-connection worm and gear speed reducer key through a spiral propelling compactor end plate, and the other end of the tapered propelling screw rod is fixed in an outlet end bearing frame.
3. A flooded spiral self-compacting water filter according to claim 2, wherein the cylindrical grate volute assembly comprises an open segment structure and a closed segment structure; wherein the opening section structure is a grid structure with a wide upper part and a narrow lower part; the closed section structure is a cylinder structure; the arc-shaped pore plate type filter screen plate is arranged at the upper part in the opening section structure.
4. A flooded spiral self-compacting water filter as claimed in claim 3 wherein the curved perforated plate filter screen is a stainless steel perforated plate mounted inside the open section structure with an insert quick-open configuration.
5. A flooded spiral self-compacting water filter as claimed in claim 3 or 4, wherein the tapered ram screw comprises a ram screw and a compacting screw; wherein the screw of the propelling section has equal screw pitch, and the edge of the propelling section is additionally provided with a brush structure; the compaction section screw is in a gradually-reduced screw pitch.
6. A flooded spiral self-compacting water filter as claimed in claim 5 in which the impeller section screw is located within the open section structure; the compaction section screw is disposed within the closure section structure.
7. A flooded spiral self-compacting water filter as claimed in claim 3 wherein the scaled overflow outlet is of bi-directional scaled dustpan type construction attached to the open section structure of the cylindrical grille volute assembly.
8. A flooded spiral self-compacting water filter as claimed in claim 3, wherein the rubber compaction damper is of a rubber tapered construction, flanged to the closed section construction of the cylindrical grid volute assembly; the dirt dust collecting hopper is connected to the closed section structure of the cylindrical grid volute component through the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011038838.1A CN112076516A (en) | 2020-09-28 | 2020-09-28 | Overflow type spiral self-compaction water filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011038838.1A CN112076516A (en) | 2020-09-28 | 2020-09-28 | Overflow type spiral self-compaction water filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112076516A true CN112076516A (en) | 2020-12-15 |
Family
ID=73739793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011038838.1A Pending CN112076516A (en) | 2020-09-28 | 2020-09-28 | Overflow type spiral self-compaction water filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112076516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377452A (en) * | 2022-01-11 | 2022-04-22 | 全球通(浙江)环保科技有限公司 | Bionical attitude sewage treatment device |
-
2020
- 2020-09-28 CN CN202011038838.1A patent/CN112076516A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377452A (en) * | 2022-01-11 | 2022-04-22 | 全球通(浙江)环保科技有限公司 | Bionical attitude sewage treatment device |
| CN114377452B (en) * | 2022-01-11 | 2023-08-04 | 全球通(浙江)环保科技有限公司 | Bionic sewage treatment device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112554303B (en) | Intelligent waterlogging prevention flood diversion system device and method based on smart sponge city | |
| CN214738590U (en) | Station building bridge bottom drain pipe with self-cleaning function | |
| CN112076516A (en) | Overflow type spiral self-compaction water filter | |
| CN212004772U (en) | Pipeline for sewage treatment | |
| CN211774234U (en) | Water conservancy aspect anti-return sewage drainage device | |
| CN212283080U (en) | Overflow type spiral self-compaction water filter | |
| CN215975023U (en) | Coarse grid for sewage treatment | |
| CN209114587U (en) | A kind of urban construction gully pollution cutting device | |
| CN112031169A (en) | Assembled box type house with rainwater collecting function | |
| CN217188111U (en) | Construction sewage treatment ware case | |
| CN214746059U (en) | Be used for warm logical blocking-proof drainage device of usefulness of building | |
| CN110939192B (en) | Water catch bowl blowdown structure | |
| CN205710151U (en) | A kind of dmp filter purifier | |
| CN219011414U (en) | Energy-saving electric current discarding device | |
| CN219481773U (en) | Building site sewage treatment ware | |
| CN219586851U (en) | Building construction rainfall drainage structures | |
| CN219596064U (en) | Municipal road concave green belt water purification device | |
| CN220361335U (en) | Wet electrostatic precipitator convenient to drain sewage | |
| CN220353018U (en) | Road drainage device for sponge city | |
| CN220928033U (en) | Roof rainwater collecting and utilizing structure | |
| CN213698976U (en) | Novel drainage is filtered device | |
| CN213527761U (en) | Villages and small towns are grid well for sewage treatment convenient to waste collection | |
| CN213771573U (en) | Domestic sewage filtering device | |
| CN218233640U (en) | Novel rainwater is collected device | |
| CN219011409U (en) | Building drainage anti-blocking device |
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 |