CN112295284A - Intelligent water supply and drainage system for building - Google Patents
Intelligent water supply and drainage system for building Download PDFInfo
- Publication number
- CN112295284A CN112295284A CN202011154464.XA CN202011154464A CN112295284A CN 112295284 A CN112295284 A CN 112295284A CN 202011154464 A CN202011154464 A CN 202011154464A CN 112295284 A CN112295284 A CN 112295284A
- Authority
- CN
- China
- Prior art keywords
- filter screen
- box body
- box
- piston
- connecting block
- 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.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 239000012535 impurity Substances 0.000 abstract description 19
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 10
- 238000005457 optimization Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 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
-
- 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
- B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
- B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
-
- 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
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6423—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a translational movement with respect to the filtering element
-
- 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
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/122—Pipe-line systems for waste water in building
- E03C1/1222—Arrangements of devices in domestic waste water pipe-line systems
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
- E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
- E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
- E03C1/26—Object-catching inserts or similar devices for waste pipes or outlets
- E03C1/264—Separate sieves or similar object-catching inserts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention discloses an intelligent water supply and drainage system for a building, which comprises a box body, a drainage structure, a water inlet pipeline, a water outlet pipeline, an anti-blocking structure, a connecting block, a connecting rope, a spring, a filter screen brush, a third filter screen, a first magnet, a piston, a second magnet and a water outlet. The invention has the beneficial effects that: carry out the clearance of impurity to the third filter screen through set up the filter screen brush on the inside fixed third filter screen top side of box, prevent that the third filter screen from blockking up, third filter screen top side is fixed with the connecting block, the connecting block passes through the spring and is connected with the box inside wall, the connecting block opposite side is connected with the connection rope, the other end of connecting the rope is fixed with the piston, the piston slides in the inside groove of seting up with the laminating of piston diameter of box, after the third filter screen is blockked up by impurity, the water that gets into from the inlet channel can't pass through from the third filter screen, will follow the side outflow of third filter screen, flow in the groove at piston place, the retaining in the groove on piston top side increases.
Description
Technical Field
The invention relates to a drainage filtering system, in particular to a water supply and drainage system for an intelligent building, and belongs to the technical field of intelligent buildings.
Background
The intelligent building optimally combines the structure, system, service and management of the building according to the requirements of users, thereby providing an efficient, comfortable and convenient humanized building environment for the users. The intelligent building is a product integrating modern science and technology. The technical foundation of the intelligent building is mainly composed of a modern building technology, a modern computer technology, a modern communication technology and a modern control technology, and the intelligent building is generated along with the requirements of human beings on information exchange, safety, comfort, convenience and energy conservation inside and outside the building. The intelligent building and energy-saving industry emphasizes user experience and has endogenous development power. The intelligent improvement customer work efficiency of building promotes the building suitability, reduces use cost, has become the development trend. The intelligent building is defined as 'taking a building as a platform, having an information facility system, an informatization application system, a building equipment management system, a public safety system and the like, integrating structures, systems, services, management and optimized combination thereof into a whole, and providing a safe, efficient, convenient, energy-saving, environment-friendly and healthy building environment for people'.
In intelligent building, the discharge of domestic waste water can set up the filter screen before waste water gets into the sewer pipe usually and intercept the impurity in the waste water to prevent that the sewer pipe can block up, the long-time use of filter screen can make too much impurity adhere to filter screen surface blockage filter screen, leads to the unable filter screen discharge of following of water.
Disclosure of Invention
The invention aims to solve the problems and provide an intelligent water supply and drainage system for buildings, which can automatically clean impurities on a filter screen and prevent the filter screen from being blocked.
The invention achieves the purpose through the following technical scheme, and the intelligent projection equipment convenient for angle adjustment comprises a box body, wherein the top of the box body is provided with a drainage structure, the drainage structure comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is installed at the top of the box body, the water outlet pipeline is installed at the bottom of the box body, an anti-blocking structure is arranged inside the box body, the anti-blocking structure comprises a connecting block, a connecting rope, a spring, a filter screen brush, a third filter screen, a first magnet, a piston, a second magnet and a water outlet, the third filter screen is fixed inside the box body, the top side of the third filter screen is provided with the connecting block, the spring is arranged between the connecting block and the inner side wall of the box body, the bottom side of the connecting block is fixedly connected with the filter screen brush, the bottom side of the filter screen brush slides with the third filter screen, and one, the other end of the connecting rope is fixedly connected with the piston, the piston is connected with the box body in a sliding mode, the first magnet is fixed inside the piston, the second magnet is fixedly connected inside the box body, and the water outlet is formed in the box body.
Preferably, in order to carry out spacingly to the connecting block, prevent that the filter screen brush from breaking away from third filter screen top side, prevent that the jam structure still includes stopper and fixed pulley, the inside fixedly connected with of box the stopper, the inside fixedly connected with of box the fixed pulley, the connection rope is in the fixed pulley outside slides.
Preferably, in order to collect the filtered impurities, a collecting structure is arranged inside the box body, the collecting structure comprises a collecting box, and the collecting box is fixedly connected to one side of the box body.
Preferably, in order to enable the impurities filtered by the third filter screen to enter the collecting box, the collecting structure further comprises a water outlet, and the water outlet is formed at the joint of the box body and the collecting box.
Preferably, in order to separate the impurities filtered by the third filter screen from water, the collecting structure further comprises a second filter screen, the second filter screen is arranged between the box body and the water outlet, and the connecting rope penetrates through the second filter screen.
Preferably, in order to separate the impurities and the water in the collecting box, the collecting structure further comprises a first filter screen, and the first filter screen is fixed inside the collecting box.
Preferably, in order to enable water inside the collecting box to be discharged through a drainage pipeline arranged on the box body, the collecting structure further comprises a drainage pipeline, the drainage pipeline is fixedly connected to the bottom side of the first filter screen, and the other end of the drainage pipeline is arranged inside the box body.
The invention has the beneficial effects that: the third filter screen is cleaned of impurities by arranging a filter screen brush on the top side of the third filter screen fixed in the box body, the third filter screen is prevented from being blocked, a connecting block is fixed on the top side of the third filter screen, the connecting block is connected with the inner side wall of the box body through a spring, a connecting rope is connected on the other side of the connecting block, the other end of the connecting rope is fixed with a piston, the piston slides in a groove which is formed in the box body and is matched with the diameter of the piston, when the third filter screen is blocked by impurities, water entering from a water inlet pipeline cannot pass through the third filter screen, the water flows out from the side edge of the third filter screen, flows into the groove where the piston is located, the water stored in the groove on the top side of the piston is increased, the piston starts to slide under the influence of weight, the connecting block is connected with the connecting rope on the top side of the piston, the connecting block drives the connecting block, when the water storage capacity above the piston is enough, the piston slides in the groove to the top side position of the water outlet, water above the piston can be discharged through the water outlet, the first magnet and the second magnet which are arranged inside the piston are attracted, the maximum magnetic force of the two magnets is slightly smaller than the maximum tensile force of the spring, and therefore the piston can be pulled back to the original position by the tensile force of the spring at the moment that all water flows out through the water outlet.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a connection structure between the case and the anti-clogging structure shown in FIG. 1;
fig. 3 is an enlarged view of the portion a shown in fig. 2.
In the figure: 1. the water outlet device comprises a box body, 2, a drainage structure, 21, a water inlet pipeline, 22, a water outlet pipeline, 3, a collection structure, 31, a collection box, 32, a first filter screen, 33, a water outlet, 34, a drainage pipeline, 35, a second filter screen, 4, an anti-blocking structure, 41, a connecting block, 42, a connecting rope, 43, a limiting block, 44, a fixed pulley, 45, a spring, 46, a filter screen brush, 47, a third filter screen, 48, a first magnet, 49, a piston, 49a, a second magnet, 49b and a water outlet.
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. 1-3, an intelligent water supply and drainage system for buildings comprises a box body 1, a drainage structure 2 is arranged at the top of the box body 1, the drainage structure 2 comprises a water inlet pipe 21 and a water outlet pipe 22, the water inlet pipe 21 is arranged at the top of the box body 1, the water outlet pipe 22 is arranged at the bottom of the box body 1, an anti-clogging structure 4 is arranged inside the box body 1, the anti-clogging structure 4 comprises a connecting block 41, a connecting rope 42, a spring 45, a filter screen brush 46, a third filter screen 47, a first magnet 48, a piston 49, a second magnet 49a and a water outlet 49b, the third filter screen 47 is fixed inside the box body 1, the connecting block 41 is arranged at the top side of the third filter screen 47, the spring 45 is arranged between the connecting block 41 and the inner side wall of the box body 1, and the filter screen brush 46 is fixedly connected at, the bottom side of the filter screen brush 46 slides with the third filter screen 47, one side of the connecting block 41 departing from the spring 45 is fixedly connected with the connecting rope 42, the other end of the connecting rope 42 is fixedly connected with the piston 49, the piston 49 is in sliding connection with the box body 1, the first magnet 48 is fixed inside the piston 49, the second magnet 49a is fixedly connected inside the box body 1, and the water outlet 49b is formed inside the box body 1.
As a technical optimization scheme of the present invention, the anti-blocking structure 4 further includes a limiting block 43 and a fixed pulley 44, the limiting block 43 is fixedly connected inside the box body 1, the fixed pulley 44 is fixedly connected inside the box body 1, and the connecting rope 42 slides outside the fixed pulley 44.
As a technical optimization scheme of the invention, a collection structure 3 is arranged in the box body 1, the collection structure 3 comprises a collection box 31, and the collection box 31 is fixedly connected to one side of the box body 1.
As a technical optimization scheme of the invention, the collecting structure 3 further comprises a water outlet 33, and the water outlet 33 is formed at the joint of the box body 1 and the collecting box 31.
As a technical optimization scheme of the present invention, the collecting structure 3 further includes a second filter screen 35, the second filter screen 35 is disposed between the box body 1 and the water outlet 33, and the connecting rope 42 penetrates through the second filter screen 35.
As a technical optimization scheme of the present invention, the collecting structure 3 further includes a first filter screen 32, and the first filter screen 32 is fixed inside the collecting box 31.
As a technical optimization scheme of the present invention, the collection structure 3 further includes a drainage pipeline 34, the drainage pipeline 34 is fixedly connected to the bottom side of the first filter screen 32, and the other end of the drainage pipeline 34 is disposed inside the box body 1.
When the invention is used, firstly, the water inlet pipeline 21 is arranged at the top side of the box body 1, then the water outlet pipeline 22 is arranged at the bottom side of the box body 1, after the wastewater enters the box body 1 through the water inlet pipeline 21, the wastewater can pass through the third filter screen 47, the third filter screen 47 can filter the wastewater, impurities in the wastewater can be intercepted, when the impurities are excessive, the impurities can block the third filter screen 47, so that the wastewater can not pass through the third filter screen 47, the third filter screen 47 is cleaned by arranging the filter screen brush 46 at the top side of the third filter screen 47 fixed in the box body 1, so as to prevent the third filter screen 47 from being blocked, the top side of the third filter screen 47 is fixed with the connecting block 41, the connecting block 41 is connected with the inner side wall of the box body 1 through the spring 45, the connecting rope 42 is connected at the other side of the connecting block 41, the middle part of the connecting rope 42 slides on the fixed pulley 44 arranged in the box body 1, the other end of the connecting rope 42 is fixed with the piston 49, the piston 49 slides in a groove which is arranged in the box body 1 and is attached to the diameter of the piston 49, when the third filter screen 47 is blocked by impurities, water entering from the water inlet pipeline 21 cannot pass through the filter screen of the third filter screen 47, the water flows out from the side edge of the third filter screen 47 and flows into the groove where the piston 49 is located, the water stored in the groove on the top side of the piston 49 is increased, the piston 49 starts to slide under the influence of weight, because the connecting rope 42 on the top side of the piston 49 is connected with the connecting block 41, the connecting block 41 drives the filter screen brush 46 to slide to clean the third filter screen 47, because the connecting block 41 is connected with the box body 1 through the spring 45, the connecting block 41 and the box body 1 are always in a connecting state, when the connecting block 41 slides to a certain position, the limiting block 43 fixed in the box body 1 can block 41, the sliding of the, when the piston 49 slides in the groove to the top position of the water outlet 49b, the water above the piston will be discharged through the water outlet 49b, at this time, the first magnet 48 and the second magnet 49a installed inside the piston 49 are attracted, the maximum magnetic force of the two magnets is slightly larger than the maximum pulling force of the spring 45, so that the piston 49 will be pulled back to the original position by the pulling force of the spring 45 at the moment that the water completely flows out through the water outlet 49b, when the impurities cleaned by the filter brush 46 to the third filter screen 47 will be drawn into the collection tank 31 through the second filter screen 35, most of the waste water mixed with the impurities will flow into the upper part of the piston 49 through the second filter screen 35, the impurities will enter into the collection tank 31, the first filter screen 32 is installed on the bottom side of the collection tank 31, and at this time, less waste water may be mixed with the impurities, the waste water will enter into the bottom-side-installed drainage pipe 34 through the first filter screen 32, the worker only needs to clean the foreign materials in the collection tank 31 periodically.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The utility model provides an intelligence is drainage system for building, includes box (1), its characterized in that: the water drainage structure (2) is arranged at the top of the box body (1), the water drainage structure (2) comprises a water inlet pipeline (21) and a water outlet pipeline (22), the water inlet pipeline (21) is installed at the top of the box body (1), the water outlet pipeline (22) is installed at the bottom of the box body (1), an anti-blocking structure (4) is arranged inside the box body (1), the anti-blocking structure (4) comprises a connecting block (41), a connecting rope (42), a spring (45), a filter screen brush (46), a third filter screen (47), a first magnet (48), a piston (49), a second magnet (49a) and a water outlet (49b), the third filter screen (47) is fixed inside the box body (1), the connecting block (41) is arranged on the top side of the third filter screen (47), and the spring (45) is arranged between the connecting block (41) and the inner side wall of the box body, connecting block (41) bottom side fixedly connected with filter screen brush (46), filter screen brush (46) bottom side with third filter screen (47) slide, connecting block (41) deviate from one side fixedly connected with of spring (45) connect rope (42), connect rope (42) other end fixedly connected with piston (49), piston (49) with box (1) sliding connection, piston (49) inside is fixed with first magnet (48), box (1) inside fixedly connected with second magnet (49a), box (1) inside has been seted up delivery port (49 b).
2. The intelligent building water supply and drainage system according to claim 1, wherein: the anti-blocking structure (4) further comprises a limiting block (43) and a fixed pulley (44), the limiting block (43) is fixedly connected inside the box body (1), the fixed pulley (44) is fixedly connected inside the box body (1), and the connecting rope (42) slides outside the fixed pulley (44).
3. The intelligent building water supply and drainage system according to claim 1, wherein: the collecting box is characterized in that a collecting structure (3) is arranged inside the box body (1), the collecting structure (3) comprises a collecting box (31), and the collecting box (31) is fixedly connected to one side of the box body (1).
4. The intelligent building water supply and drainage system according to claim 3, wherein: the collecting structure (3) further comprises a water outlet (33), and the water outlet (33) is formed in the connecting position of the box body (1) and the collecting box (31).
5. The intelligent building water supply and drainage system according to claim 4, wherein: collect structure (3) and still include second filter screen (35), box (1) with be equipped with between outlet (33) second filter screen (35), connect rope (42) to run through second filter screen (35).
6. The intelligent building water supply and drainage system according to claim 5, wherein: the collecting structure (3) further comprises a first filter screen (32), and the first filter screen (32) is fixed inside the collecting box (31).
7. The intelligent building water supply and drainage system according to claim 6, wherein: collect structure (3) and still include drainage pipe (34), first filter screen (32) bottom side fixedly connected with drainage pipe (34), drainage pipe (34) other end is located inside box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011154464.XA CN112295284A (en) | 2020-10-26 | 2020-10-26 | Intelligent water supply and drainage system for building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011154464.XA CN112295284A (en) | 2020-10-26 | 2020-10-26 | Intelligent water supply and drainage system for building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112295284A true CN112295284A (en) | 2021-02-02 |
Family
ID=74330897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011154464.XA Withdrawn CN112295284A (en) | 2020-10-26 | 2020-10-26 | Intelligent water supply and drainage system for building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112295284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113975882A (en) * | 2021-10-18 | 2022-01-28 | 邓玲丽 | Petroleum filtering equipment |
| CN114504851A (en) * | 2022-01-22 | 2022-05-17 | 河南雷佰瑞新材料科技有限公司 | Filtering device and method for synthesizing HMDA |
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| CN208280286U (en) * | 2018-04-23 | 2018-12-25 | 山东天为工程技术有限公司 | A kind of anticlogging municipal drainage pipeline |
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| CN111456217A (en) * | 2020-05-26 | 2020-07-28 | 杭州绪原科技有限公司 | Sewage pipeline capable of automatically processing blocking condition |
| CN111514639A (en) * | 2020-05-20 | 2020-08-11 | 杭州富阳宣星智能科技有限公司 | Automatic clean sewage filtration equipment of filter screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106013321A (en) * | 2016-05-19 | 2016-10-12 | 丁国忠 | Novel household water treatment device |
| CN208280286U (en) * | 2018-04-23 | 2018-12-25 | 山东天为工程技术有限公司 | A kind of anticlogging municipal drainage pipeline |
| CN108755858A (en) * | 2018-06-20 | 2018-11-06 | 黄钰莹 | A kind of energy saving and environment friendly device for recycling sewage |
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| CN113975882A (en) * | 2021-10-18 | 2022-01-28 | 邓玲丽 | Petroleum filtering equipment |
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| CN114504851A (en) * | 2022-01-22 | 2022-05-17 | 河南雷佰瑞新材料科技有限公司 | Filtering device and method for synthesizing HMDA |
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Application publication date: 20210202 |