CN110818121A - Industrial wastewater comprehensive purification device - Google Patents
Industrial wastewater comprehensive purification device Download PDFInfo
- Publication number
- CN110818121A CN110818121A CN201911292128.9A CN201911292128A CN110818121A CN 110818121 A CN110818121 A CN 110818121A CN 201911292128 A CN201911292128 A CN 201911292128A CN 110818121 A CN110818121 A CN 110818121A
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- China
- Prior art keywords
- waste water
- cotton
- collection box
- fixed
- dust collection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses the technical field of industrial wastewater comprehensive purification devices, and particularly relates to an industrial wastewater comprehensive purification device which comprises a wastewater pipeline, wherein a dust leakage pipe is integrally arranged at the lower end of the wastewater pipeline, a manual valve is arranged on the dust leakage pipe, one end, far away from the wastewater pipeline, of the dust leakage pipe is connected with a connecting pipe in a threaded fit mode, a dust collection box is integrally arranged at one end, far away from the dust leakage pipe, of the connecting pipe, the dust collection box is of a rectangular box body structure, a collection cavity is arranged in the dust collection box, and three groups of cotton pads which are distributed up and down are arranged in. The dust collection box below the waste water pipeline can be used for collecting garbage and sediment passing through the waste water pipeline, so that the time and cost for subsequent waste water treatment are reduced; the garbage and the sediment in the dust collection box are convenient to collect and clean, and can be cleaned without stopping the sewage treatment process, so that the sewage treatment efficiency is improved; the anti-reflux filter cotton shell for preventing garbage and sediment from flowing back is arranged in the dust collection box, so that the blockage of a waste water pipeline is avoided.
Description
Technical Field
The invention relates to the technical field of industrial wastewater comprehensive purification devices, in particular to an industrial wastewater comprehensive purification device.
Background
The industrial wastewater comprehensive purification device can be used for purifying industrial wastewater, and is generally discharged into a fixed treatment tank through a sewage discharge pipeline for treatment, but the industrial wastewater comprehensive purification device still has the following disadvantages in practical use:
1. when the waste water is discharged into a fixed treatment pool through a sewage discharge pipeline, more garbage is mixed in the waste water, and the impurities are required to be manually salvaged and then treated, so that the efficiency is low, and the labor cost is increased;
2. when the sewage is discharged to a fixed treatment pool through a sewage discharge pipeline, more sediments are not easy to clean, the treatment efficiency is influenced, and the treatment time and the treatment cost are increased;
3. the sewage discharge pipeline is easy to block due to excessive garbage when industrial wastewater is discharged, and the treatment efficiency is influenced.
Therefore, we propose an industrial wastewater comprehensive purification device to solve the above disadvantages.
Disclosure of Invention
The invention aims to provide an industrial wastewater comprehensive purification device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an industrial wastewater comprehensive purification device comprises a wastewater pipeline, wherein a dust leakage pipe is integrally arranged at the lower end of the wastewater pipeline, a manual valve is arranged on the dust leakage pipe, one end, away from the wastewater pipeline, of the dust leakage pipe is connected with a connecting pipe in a threaded fit manner, a dust collection box is integrally arranged at one end, away from the dust leakage pipe, of the connecting pipe, the dust collection box is of a rectangular box structure, a collection cavity is arranged in the dust collection box, three groups of cotton pads which are distributed up and down are arranged in the dust collection box, the cotton pads are of an S-shaped plate structure, an upper groove is formed at the upper end of each cotton pad, a lower groove is formed at the lower end of each cotton pad, a bracing spring is arranged in each lower groove, the left end and the right end of each bracing spring are respectively bonded in the inner walls of the left side and the right side of each lower groove through glue, the lower grooves and the upper grooves on the, the magnetic suction block is fixed on the upper surface of the stainless steel supporting block in an adsorption mode, the stainless steel supporting block is fixedly welded in the inner wall of the dust collection box, a filtering cotton layer is arranged inside the waste water pipeline, and the filtering cotton layer is arranged on the right side of an opening of the dust leakage pipe communicated with the waste water pipeline.
Preferably, the inside of connecting pipe is equipped with prevents filtering the cotton shell against current, prevent filtering the cotton shell against current and be the hemisphere casing that the opening is down, prevent leaving the circulation clearance between filtering the cotton shell against current and the dust leakage pipe.
Preferably, the lower end outer ring of the anti-reflux filtering cotton shell is fixedly provided with a plurality of magnetic suction plates distributed in a circular array shape, the magnetic suction plates are fixed on the upper surface of the stainless steel support plate in an adsorption manner, and the stainless steel support plate is fixedly welded on the inner wall of the connecting pipe.
Preferably, an arc-shaped opening is formed in an opening of the dust leakage pipe, which is communicated with the waste water pipeline.
Preferably, the right side face of the filtering cotton layer is movably attached with a supporting filter plate, the supporting filter plate is fixedly welded in the inner wall of the waste water pipeline, and a plurality of groups of third filter holes penetrating left and right are formed in the surface of the supporting filter plate.
Preferably, the left side activity laminating on filtering cotton layer has the magnetism fixed plate, the fixed stainless steel clamp plate that is equipped with of left side of magnetism fixed plate, the left at the support filter plate is fixed in the absorption of magnetism fixed plate.
Preferably, the surface of the magnetic fixing plate is provided with a plurality of groups of first filter holes penetrating left and right, the surface of the stainless steel pressing plate is provided with a plurality of groups of second filter holes penetrating left and right, and the first filter holes and the second filter holes are communicated.
Preferably, the fixed criss-cross backup pad that is equipped with of lower extreme opening part of preventing filtering against current cotton shell, the fixed surface of backup pad is equipped with prevents the deformation spring, the upper end activity laminating of preventing the deformation spring is in preventing filtering against current cotton shell's inner wall.
Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:
1. the dust collection box below the waste water pipeline can be used for collecting garbage and sediment passing through the waste water pipeline, so that the time and cost for subsequent waste water treatment are reduced;
2. the garbage and the sediment in the dust collection box are convenient to collect and clean, and can be cleaned without stopping the sewage treatment process, so that the sewage treatment efficiency is improved;
3. the anti-reflux filter cotton shell for preventing garbage and sediment from flowing back is arranged in the dust collection box, so that the blockage of a waste water pipeline is avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic view of the structure of the anti-reflux filtration cotton shell of the present invention;
FIG. 5 is an enlarged view of the structure at A in FIG. 3 according to the present invention;
FIG. 6 is an enlarged view of the structure at B in FIG. 3 according to the present invention.
In the figure: the device comprises a waste water pipeline 1, a dust collection box 2, a dust leakage pipe 3, a connecting pipe 4, a manual valve 5, a filtering cotton layer 6, an anti-reflux filtering cotton shell 7, a stainless steel supporting plate 8, a magnetic suction plate 9, a supporting plate 10, an anti-deformation spring 11, a magnetic fixing plate 12, a first filtering hole 13, a stainless steel pressing plate 14, a third filtering hole 15, a supporting filtering plate 16, a cotton pad 17, a tightening spring 18, a magnetic suction block 19, a stainless steel supporting block 20, a leakage hole 21, a lower groove 22, an upper groove 23, a collection cavity 24, a circulation gap 25 and a second filtering hole 26.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, the present invention provides a technical solution: an industrial wastewater comprehensive purification device comprises a wastewater pipeline 1, a dust leakage pipe 3 is integrally arranged at the lower end of the wastewater pipeline 1, a manual valve 5 is arranged on the dust leakage pipe 3, one end of the dust leakage pipe 3, which is far away from the wastewater pipeline 1, is connected with a connecting pipe 4 through screw thread fit, one end of the connecting pipe 4, which is far away from the dust leakage pipe 3, is integrally provided with a dust collection box 2, the dust collection box 2 is in a rectangular box structure, a collection cavity 24 is arranged in the dust collection box 2, three groups of cotton pads 17 which are distributed up and down are arranged in the dust collection box 2, the cotton pads 17 are in an S-shaped plate structure, an upper groove 23 is formed at the upper end of each cotton pad 17, a lower groove 22 is formed at the lower end of each cotton pad 17, a bracing spring 18 is arranged in the lower groove 22, the left end and, the cotton pad 17 is ensured to be in an S-shaped structure, and has good precipitation and collection effects on garbage and precipitation;
the lower grooves 22 and the upper grooves 23 on the cotton pads 17 distributed up and down are mutually staggered, the bottom of the upper groove 23 is provided with a leakage hole 21, the leakage hole 21 is used for garbage and sediment to fall down, and the garbage and the sediment can be well collected among the three groups of cotton pads 17;
the left end and the right end of the cotton pad 17 are fixedly provided with magnetic attraction blocks 19, the magnetic attraction blocks 19 are fixedly attracted to the upper surface of a stainless steel supporting block 20, and the stainless steel supporting block 20 is fixedly welded in the inner wall of the dust collection box 2, so that the cotton pad 17 is convenient to disassemble and clean;
wherein, the inside of waste pipe 1 is equipped with filters cotton layer 6, filters cotton layer 6 and sets up on the opening part right side that leaks dirt pipe 3 intercommunication waste pipe 1.
The inside of connecting pipe 4 is equipped with prevents filtering against current cotton shell 7, prevents filtering against current cotton shell 7 and is the hemisphere casing that the opening is down, prevents leaving circulation clearance 25 between filtering against current cotton shell 7 and the hourglass dirt pipe 3, supplies rubbish and deposits to fall down.
The lower end outer ring of the anti-reflux filtering cotton shell 7 is fixedly provided with a plurality of magnetic suction plates 9 which are distributed in a circular array shape, the magnetic suction plates 9 are adsorbed and fixed on the upper surface of the stainless steel support plate 8, the stainless steel support plate 8 is fixedly welded on the inner wall of the connecting pipe 4, and the anti-reflux filtering cotton shell is convenient to fix and dismount and easy to clean.
Wherein, the opening part that leaks dirt pipe 3 intercommunication waste water pipeline 1 is equipped with the arc mouth, makes things convenient for rubbish and deposits to fall in leaking dirt pipe 3.
A support filter plate 16 is movably attached to the right side surface of the filter cotton layer 6, the support filter plate 16 is fixedly welded in the inner wall of the waste water pipeline 1, and a plurality of groups of third filter holes 15 which penetrate left and right are formed in the surface of the support filter plate 16.
The left side surface of the filtering cotton layer 6 is movably attached with a magnetic fixing plate 12, the left side surface of the magnetic fixing plate 12 is fixedly provided with a stainless steel pressing plate 14, the magnetic fixing plate 12 is fixed on the left side of the supporting filter plate 16 in an adsorption mode, the stainless steel pressing plate 14 can press the filtering cotton layer 6 on the supporting filter plate 16 well, and the magnetic fixing plate 12 plays a role in adsorption and fixation.
The surface of the magnetic fixing plate 12 is provided with a plurality of groups of first filtering holes 13 which penetrate left and right, the surface of the stainless steel pressing plate 14 is provided with a plurality of groups of second filtering holes 26 which penetrate left and right, and the first filtering holes 13 and the second filtering holes 26 are communicated, so that the circulation of water flow is ensured.
The cross-shaped supporting plate 10 is fixedly arranged at the lower end opening of the anti-backflow filtering cotton shell 7, the deformation-preventing spring 11 is fixedly arranged on the surface of the supporting plate 10, the upper end of the deformation-preventing spring 11 is movably attached to the inner wall of the anti-backflow filtering cotton shell 7, and the tightening of the anti-backflow filtering cotton shell 7 is guaranteed.
The working principle is as follows: the dust collection box 2 below the waste water pipeline 1 can be used for collecting garbage and sediment passing through the waste water pipeline 1, so that the time and cost for subsequent waste water treatment are reduced; the garbage and sediment in the waste water pipeline 1 are filtered and blocked by the filtering cotton layer 6 and can leak into the dust collection box 2 through the dust leakage pipe 3.
According to the invention, the garbage and the sediment in the dust collection box 2 are convenient to collect and clean, and can be cleaned without stopping the sewage treatment process, so that the sewage treatment efficiency is improved; and the manual valve 5 at the upper end of the corresponding dust collection box 2 is closed, so that the dust collection box 2 can be conveniently detached and cleaned through the threaded structures of the connecting pipe 4 and the dust leakage pipe 3.
In the invention, the anti-reflux filtering cotton shell 7 for preventing reverse flow of garbage and sediment is arranged in the dust collection box 2, so that the blockage of a waste water pipeline is avoided, the garbage in the waste water pipeline 1 can fall down through the arc-shaped surface on the anti-reflux filtering cotton shell 7 through the circulation gap 25, and the reverse flow of the garbage and the sediment is avoided due to the good structure of the hemispherical shell of the anti-reflux filtering cotton shell 7.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a purifier is synthesized to industrial waste water, includes waste water pipeline (1), its characterized in that: the dust leakage device is characterized in that a dust leakage pipe (3) is integrally arranged at the lower end of the waste water pipeline (1), a manual valve (5) is arranged on the dust leakage pipe (3), one end, away from the waste water pipeline (1), of the dust leakage pipe (3) is connected with a connecting pipe (4) in a threaded fit mode, one end, away from the dust leakage pipe (3), of the connecting pipe (4) is integrally provided with a dust collection box (2), the dust collection box (2) is of a rectangular box body structure, a collection cavity (24) is arranged in the dust collection box (2), three groups of cotton pads (17) which are distributed up and down are arranged in the dust collection box (2), each cotton pad (17) is of an S-shaped plate structure, an upper groove (23) is formed at the upper end of each cotton pad (17), a lower groove (22) is formed at the lower end of each cotton pad (17), a tension spring (18) is arranged in each lower groove (22), the left end and the right, lower recess (22) and upper groove (23) on cotton pad (17) that distribute from top to bottom crisscross each other, and the bottom of upper groove (23) is equipped with small opening (21), and both ends are all fixed to be equipped with magnetism about cotton pad (17) and inhale piece (19), and magnetism inhales piece (19) and adsorbs to be fixed at the upper surface of stainless steel supporting shoe (20), stainless steel supporting shoe (20) fixed welding is in the inner wall of dust collection box (2), the inside of waste water pipeline (1) is equipped with filters cotton layer (6), filter cotton layer (6) set up on the opening part right side of dust leakage pipe (3) intercommunication waste water pipeline (1).
2. The integrated purification device for industrial wastewater according to claim 1, characterized in that: the inside of connecting pipe (4) is equipped with prevents filtering against current cotton shell (7), prevent filtering against current cotton shell (7) and be opening hemisphere casing down, prevent leaving circulation clearance (25) between filtering against current cotton shell (7) and hourglass dirt pipe (3).
3. The comprehensive purification device for industrial wastewater according to claim 2, characterized in that: the lower extreme outer lane department of preventing filtering against current cotton shell (7) is fixed to be equipped with a plurality of magnetism suction disc (9) of constituteing circular array form and distributing, the upper surface at stainless steel backup pad (8) is fixed in magnetism suction disc (9) absorption, stainless steel backup pad (8) fixed welding is on the inner wall of connecting pipe (4).
4. The integrated purification device for industrial wastewater according to claim 1, characterized in that: an arc-shaped opening is formed in the opening of the dust leakage pipe (3) communicated with the waste water pipeline (1).
5. The integrated purification device for industrial wastewater according to claim 1, characterized in that: the right side face of the filtering cotton layer (6) is movably attached with a supporting filter plate (16), the supporting filter plate (16) is fixedly welded in the inner wall of the waste water pipeline (1), and a plurality of groups of three filter holes (15) which penetrate through the surface of the supporting filter plate (16) are formed.
6. The integrated purification device for industrial wastewater according to claim 1, characterized in that: the left surface activity laminating of filtering cotton layer (6) has magnetism fixed plate (12), the fixed stainless steel clamp plate (14) that are equipped with of left surface of magnetism fixed plate (12), magnetism fixed plate (12) adsorb to be fixed in the left that supports filter plate (16).
7. The comprehensive industrial wastewater purification device of claim 6, wherein: the surface of the magnetic fixing plate (12) is provided with a plurality of groups of first filter holes (13) which penetrate left and right, the surface of the stainless steel pressing plate (14) is provided with a plurality of groups of second filter holes (26) which penetrate left and right, and the first filter holes (13) and the second filter holes (26) are communicated.
8. The comprehensive purification device for industrial wastewater according to claim 2, characterized in that: the fixed criss-cross backup pad (10) that is equipped with of lower extreme opening part of anti-reflux filtration cotton shell (7), the fixed surface of backup pad (10) is equipped with prevents deformation spring (11), the upper end activity laminating of preventing deformation spring (11) is in the inner wall of preventing anti-reflux filtration cotton shell (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292128.9A CN110818121B (en) | 2019-12-16 | 2019-12-16 | Industrial wastewater comprehensive purification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292128.9A CN110818121B (en) | 2019-12-16 | 2019-12-16 | Industrial wastewater comprehensive purification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110818121A true CN110818121A (en) | 2020-02-21 |
| CN110818121B CN110818121B (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911292128.9A Expired - Fee Related CN110818121B (en) | 2019-12-16 | 2019-12-16 | Industrial wastewater comprehensive purification device |
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| Country | Link |
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| CN (1) | CN110818121B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111467857A (en) * | 2020-03-27 | 2020-07-31 | 合肥云雀智能科技有限公司 | Water purifier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120131331A (en) * | 2011-05-25 | 2012-12-05 | 이소라 | Water treatment structure |
| CN207620084U (en) * | 2017-11-09 | 2018-07-17 | 宋慧丽 | A kind of wastewater from chemical industry blow-off line |
| CN208105436U (en) * | 2018-04-27 | 2018-11-16 | 宜昌皓月建设工程有限公司 | A kind of sewage conduct deslagging device |
| CN109205857A (en) * | 2018-11-14 | 2019-01-15 | 谢响玲 | A kind of industrial sewage treatment technology |
| CN209193664U (en) * | 2018-12-05 | 2019-08-02 | 泰兴市佳林石化机械制造有限公司 | A kind of big flow filter core of multiple filtration |
-
2019
- 2019-12-16 CN CN201911292128.9A patent/CN110818121B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120131331A (en) * | 2011-05-25 | 2012-12-05 | 이소라 | Water treatment structure |
| CN207620084U (en) * | 2017-11-09 | 2018-07-17 | 宋慧丽 | A kind of wastewater from chemical industry blow-off line |
| CN208105436U (en) * | 2018-04-27 | 2018-11-16 | 宜昌皓月建设工程有限公司 | A kind of sewage conduct deslagging device |
| CN109205857A (en) * | 2018-11-14 | 2019-01-15 | 谢响玲 | A kind of industrial sewage treatment technology |
| CN209193664U (en) * | 2018-12-05 | 2019-08-02 | 泰兴市佳林石化机械制造有限公司 | A kind of big flow filter core of multiple filtration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111467857A (en) * | 2020-03-27 | 2020-07-31 | 合肥云雀智能科技有限公司 | Water purifier |
| CN111467857B (en) * | 2020-03-27 | 2022-03-25 | 合肥云雀智能科技有限公司 | Water purifier |
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| Publication number | Publication date |
|---|---|
| CN110818121B (en) | 2020-09-08 |
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Inventor after: Yu Hao Inventor after: Xu Jingwei Inventor after: Zhu Yafei Inventor before: Zhu Yafei |
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Effective date of registration: 20200812 Address after: 211102, No. 58-3, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Applicant after: Yu Hao Address before: No. 258, Xueyuan street, Jianggan District, Hangzhou, Zhejiang Province Applicant before: Zhu Yafei |
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Granted publication date: 20200908 Termination date: 20211216 |