CN108176105A - Suspended matter filter plant in a kind of online water - Google Patents
Suspended matter filter plant in a kind of online water Download PDFInfo
- Publication number
- CN108176105A CN108176105A CN201810044141.1A CN201810044141A CN108176105A CN 108176105 A CN108176105 A CN 108176105A CN 201810044141 A CN201810044141 A CN 201810044141A CN 108176105 A CN108176105 A CN 108176105A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- strainer
- suspended matter
- suction nozzle
- filter plant
- 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 54
- 235000014347 soups Nutrition 0.000 claims abstract description 24
- 239000010865 sewage Substances 0.000 claims abstract description 23
- 238000007790 scraping Methods 0.000 claims abstract description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical group C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 210000003781 tooth socket Anatomy 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
- B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/23—Supported filter elements arranged for outward flow filtration
-
- 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
- B01D29/6415—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 rotary movement with respect to the filtering element
Abstract
The present invention provides suspended matter filter plant in a kind of online water, including being provided with water inlet, discharge outlet and the tank body of sewage draining exit, driving device is additionally provided on upper lid, driving device lower end is provided with hollow blowdown shaft；The side wall of blowdown shaft is provided with hollow soup stick；Soup stick one end is provided with the suction nozzle being in contact with strainer, suction nozzle one end is provided with opening, the both sides of the openend of suction nozzle are provided with internal gear, above-mentioned internal gear inner rotation is provided with pinion gear, rotation axis is set between the pinion gear of both sides, above-mentioned rotation axis is alongst provided with scraping dirt brush, and above-mentioned driving device is rotated through blowdown shaft driving internal gear.The scraping dirt brush rotation of the present invention easily can flow through suction nozzle by water after the dirt of screen surface is swept and soup stick is drained into blowdown shaft, is discharged from sewage draining exit, reaches cleaning, dredge the purpose of strainer, dirt is avoided in the above-mentioned accumulation of strainer, cleaning more thoroughly, work it is more efficient.
Description
Technical field
The invention belongs to sewage treatment field, more particularly to suspended matter filter plant in a kind of online water.
Background technology
China region is wide, populous, but water resource is very limited, and due to society industrialization life-stylize, perhaps
More water resources are by artificial pollution.As the development of society is increasing to the demand of water resource, how by rainwater, river water, print
The various sewage such as dyeing mill wastewater are adequately recycled and are had been to be concerned by more and more people.Since environment is contaminated, lead to rain
Indices in water, river water also can be exceeded, do not meet it is every using standard, so these water resources needs are filtered etc.
Ability recoverable after reason.
At this stage there are also available for the filter of suspended matter in drainage, such as Patent No. ZL200710157113.2
Chinese invention patent patent《A kind of filter that can remove suspended matter in water removal》Disclose a kind of tank filter.The filtering
The strainer that device is equipped with the tank body of sewage draining exit and is arranged in tank body including the water inlet at top, the water outlet of lower part, bottom, is also wrapped
A driving device being arranged at the top of the tank body and the blowdown shaft being connected with driving device output terminal transmission are included,
The blowdown shaft is perpendicularly inserted into the middle position in the tank body, also, the blowdown shaft has center through hole, center through hole
Bottom end be then connected with the sewage draining exit；The strainer is cylindrical in shape and is distributed centered on the blowdown shaft；Moreover,
On the side wall of the blowdown shaft, the position of the corresponding strainer, it is disposed with more hollow soup sticks, every suction from top to bottom
The root opening of bar is connected with the center through hole of the blowdown shaft, and the head of every soup stick is then provided with and the strainer phase
The suction nozzle of contact.Wherein, the driving device, blowdown shaft, soup stick and suction nozzle just constitute one to exclude on strainer
The blowdown apparatus of dirt.When blowdown apparatus starts, the sewage draining exit of tank base is opened, and the driving device drives blowdown shaft
Rotation, makes the soup stick being distributed in blowdown shaft and suction nozzle turn-take along strainer, in this way, because of hydraulic pressure and sewage draining exit in tank body
There are certain pressure differences for the hydraulic pressure at place, and flow meeting nature is entered from suction nozzle in blowdown shaft, and the suction nozzle on soup stick head is because of contact
Strainer, flow will impact the dirt on strainer, then these dirts are brought into suction nozzle naturally, be mixed with the flow meeting of dirt
Dropped into along soup stick in blowdown shaft, then the bottom end by blowdown shaft, sewage draining exit and discharge outside the tank.
But above-mentioned filter there are it is many defects of, such as only by the natural flushing of flow, handle the effect of dirt
Rate is relatively low, the dirt on strainer is caused to accumulate more, filter effect is not high；Secondly when the dirt accumulation on strainer is more, only
Only by suction nozzle can not absorption, can not clean out so that the whole work efficiency of filter is not high.
Invention content
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides suspended matter filter plant in a kind of online water, solves existing skill
The technical issues of filter whole work efficiency of art is low.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs：
Suspended matter filter plant in a kind of online water, including tank body, the two ends portion of above-mentioned tank body is respectively arranged with upper cover
And tank bottom, the lower part of above-mentioned tank body are additionally provided with discharge outlet；Above-mentioned upper cover is provided with water inlet, and above-mentioned tank bottom is provided with blowdown
Mouthful, the front position of above-mentioned sewage draining exit is provided with solenoid valve, is additionally provided with driving device on above-mentioned upper lid, under above-mentioned driving device
End is provided with hollow blowdown shaft；
Above-mentioned blowdown shaft is perpendicularly inserted into the middle position in above-mentioned tank body, low side and the above-mentioned row of above-mentioned blowdown shaft
Dirty mouth connection；
Above-mentioned tank interior is cylindrical in shape centered on above-mentioned blowdown shaft and strainer is distributed with, and the side wall of above-mentioned blowdown shaft exists
The position of corresponding above-mentioned strainer is provided with hollow soup stick；The one end of above-mentioned soup stick is connected with above-mentioned blowdown shaft, the other end
Portion is provided with the suction nozzle being in contact with above-mentioned strainer,
The one end of above-mentioned suction nozzle is connected with above-mentioned soup stick, and the other end is provided with opening, the openend of above-mentioned suction nozzle
Both sides be provided with internal gear, above-mentioned internal gear be internally provided with the matched pinion gear of internal gear, the pinion gears of both sides it
Between rotation axis is set, above-mentioned rotation axis is alongst provided with scraping dirt brush；
Above-mentioned driving device is through the driving internal gear rotation of blowdown shaft.
Preferably, above-mentioned scraping dirt brush is the tooth socket alongst set in rotation axis outer wall.
Preferably, the both sides of above-mentioned suction nozzle openend are both provided with strut, and above-mentioned rotation axis is rotatably arranged on above-mentioned strut
On.
Preferably, above-mentioned tank bottom is additionally provided with scale removing mouth.
Preferably, above-mentioned soup stick is disposed on the side wall of above-mentioned blowdown shaft.
Preferably, above-mentioned tank interior is provided with filter cylinder, and above-mentioned strainer is laid on the inside of above-mentioned filter cylinder.
Preferably, above-mentioned tank bottom bottom is provided with pedestal.
Preferably, above-mentioned water inlet is provided with water inlet pressure gauge, and discharge outlet pressure gauge, water inlet are provided in discharge outlet
Pressure gauge and discharge outlet pressure gauge are connected with pressure difference controller, and above-mentioned pressure difference controller controls above-mentioned driving device and electromagnetism
Valve.
(3) advantageous effect
The present invention provides suspended matter filter plants in a kind of online water, have following advantageous effect：
1st, suspended matter filter plant in online water of the invention, sewage enter from the water inlet of upper cover in filter plant, pass through
It is flowed out after the filtering of filter screen from discharge outlet.When dirt is accumulated on strainer, unlatching driving device is by the driving of blowdown shaft
Gear is moved along screen surface, internal gear walk around it is dynamic during can drive pinion rotation, so as to which scraping dirt brush be driven to rotate, scrape
Can suction nozzle easily be flowed through by water after the dirt of screen surface is swept in dirty brush rotation process and soup stick is drained into blowdown and turns
In axis, finally discharged from the sewage draining exit of tank bottom, reach cleaning, dredge the purpose of strainer.So that dirt after the sweeping of scraping dirt brush
Easily taken away by flow flushing, avoid dirt in the above-mentioned accumulation of strainer, cleaning more thoroughly, work it is more efficient.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described.
Fig. 1 is suspended matter filter plant overall structure diagram in the online water of the embodiment of the present invention；
Fig. 2 is the suction nozzle overall structure diagram in suspended matter filter plant in the online water of the embodiment of the present invention；
Fig. 3 is the suction nozzle front view in suspended matter filter plant in the online water of the embodiment of the present invention；
Fig. 4 is the suction nozzle side view in suspended matter filter plant in the online water of the embodiment of the present invention.
Wherein, tank body 1, upper cover 2, water inlet 201, water inlet pressure gauge 201, pressure difference controller 203, tank bottom 3, row's dirt
Mouthfuls 301, sewage draining exit 302, pedestal 303, solenoid valve 304, driving device 4, blowdown shaft 5, soup stick 6, suction nozzle 7, internal gear 701,
Rotation axis 702, scraping dirt brush 703, pinion gear 704, strut 705, discharge outlet 8, discharge outlet pressure gauge 801, strainer 9, filter cylinder 10.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described, it is clear that described embodiment be part of the embodiment of the present invention rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
Based on background technology and above-mentioned elaboration, as shown in figures 1-4, the embodiment of the present invention, which is provided in a kind of online water, hangs
Float filter plant, including tank body 1, the two ends portion of above-mentioned tank body 1 is respectively arranged with upper cover 2 and tank bottom 3, above-mentioned tank body 1
Lower part is additionally provided with discharge outlet 8；Above-mentioned upper cover 2 is provided with water inlet 201, and above-mentioned tank bottom 3 is provided with sewage draining exit 302, above-mentioned row
The front position of dirty mouth 302 is provided with solenoid valve 304, is additionally provided with driving device 4 in above-mentioned upper cover 2, under above-mentioned driving device 4
End is provided with hollow blowdown shaft 5；
Above-mentioned blowdown shaft 5 is perpendicularly inserted into the middle position in above-mentioned tank body 1, the low side of above-mentioned blowdown shaft 5 with it is upper
Sewage draining exit 302 is stated to connect；
It is cylindrical in shape centered on above-mentioned blowdown shaft 5 inside above-mentioned tank body 1 and strainer 9 is distributed with, the side of above-mentioned blowdown shaft 5
Wall is provided with hollow soup stick 6 in the position of the above-mentioned strainer 9 of correspondence；The one end of above-mentioned soup stick 6 is connected with above-mentioned blowdown shaft 5
Logical, the other end is provided with the suction nozzle 7 being in contact with above-mentioned strainer 9,
The one end of above-mentioned suction nozzle 7 is connected with above-mentioned soup stick 6, and the other end is provided with opening, the opening of above-mentioned suction nozzle 7
The both sides at end are provided with internal gear 701, above-mentioned internal gear 701 be internally provided with 701 matched pinion gear 704 of internal gear,
Rotation axis 702 is set between the pinion gear 704 of both sides, and above-mentioned rotation axis 702 is alongst provided with scraping dirt brush 703；
Above-mentioned driving device 4 drives internal gear 701 to rotate through blowdown shaft 5.
In specific implementation process, sewage enters from the water inlet 201 of upper cover 2 in filter plant above-described embodiment, passes through
It is flowed out after the filtering of strainer 9 from discharge outlet 8.When dirt is accumulated on strainer 9, unlatching driving device 4 drives by blowdown shaft 5
Internal gear 701 rotates, and so as to be moved along 9 surface of strainer, pinion gear 704 can be driven to rotate in 701 rotation process of internal gear, and two
The pinion gear 704 of side can drive rotation axis 702 to rotate after rotating, since opposite turn occurring between internal gear 701 and pinion gear 704
It is dynamic so that scraping dirt brush 703 strainer 9 surface pivots and sweep the dirt of 9 surface of strainer accumulation, when the sewage draining exit of tank bottom 3
After 302 solenoid valve 304 is opened, water forms certain pressure differential with the water at sewage draining exit 302 in tank body 1, and suction nozzle 7 is in strainer 9
Place of arrival flow can enter from the openend of suction nozzle 7 in blowdown shaft 5 along pressure differential in the moving process of surface, the stream of flow
The dirt that 9 surface of strainer is scraped by scraping dirt brush 703 can be washed away during dynamic, mixes the flow of this dirt from suction nozzle 7 along soup stick 6
It is discharged to outside tank through sewage draining exit 302 into blowdown shaft 5.The dirt that 9 surface of strainer is accumulated after scraping dirt brush 3 is swept is easier quilt
Flow washes away, and will not generate accumulation, and the more efficient of strainer is dredged in cleaning, so as to improve the working efficiency of filter plant, clearly
That manages is more thorough.
When it is implemented, above-mentioned scraping dirt brush 703 is the tooth socket alongst set in 702 outer wall of rotation axis.Pass through
The tooth socket of setting easily sweeps the dirt of 9 surface of strainer accumulation.
When it is implemented, the both sides of above-mentioned 7 openend of suction nozzle are both provided with strut 705, above-mentioned 702 activity setting of rotation axis
On above-mentioned strut 705.Rotation axis 702 is fixed on to the mouth end of suction nozzle 7 by strut 705, fixed effect is more secured.
When it is implemented, above-mentioned tank bottom 3 is additionally provided with scale removing mouth 301.
Above-described embodiment is in specific implementation process, and since filter plant works for a long time, the bottom of tank body 1 can accumulate
A certain amount of dirt to precipitate, opening scale removing mouth 301 can easily be expelled to the dirt to precipitate outside tank.
When it is implemented, above-mentioned soup stick 6 is disposed on the side wall of above-mentioned blowdown shaft 5.
When it is implemented, above-mentioned tank body 1 is internally provided with filter cylinder 10, above-mentioned strainer 9 is laid on the inside of above-mentioned filter cylinder 10.
Above-described embodiment more convenient reliably can be fixed strainer 9 in specific implementation process by filter cylinder 10,
Prevent strainer 9 from arbitrarily floating in tank body 1.
When it is implemented, above-mentioned 3 bottom of tank bottom is provided with pedestal 303.
When it is implemented, the water inlet 201 of any of the above-described embodiment is provided with water inlet pressure gauge 202, above-mentioned discharge outlet 8
It is provided with discharge outlet pressure gauge 801, above-mentioned water inlet pressure gauge 202 and discharge outlet pressure gauge 801 and 203 phase of pressure difference controller
Even, above-mentioned pressure difference controller 203 controls above-mentioned driving device 4 and solenoid valve 304.
For above-described embodiment in specific implementation process, driving device 4 is the power of the entire blowdown apparatus work of driving, is controlled
The driving device 4 works and existing various technologies may be used in the mode of work period length, simply, may be used pre-
The SCM program first designed, come the work that driving device 4 is controlled to be spaced within the predetermined time, by phased manner to strainer 9 into
Row cleaning.In actual operation, the amount containing dirt in sewage is all different, and when full dirt is accumulated on strainer 9, the hydraulic pressure in tank body
It can rise namely the hydraulic pressure of water inlet 201 can be higher than the hydraulic pressure of discharge outlet 8, therefore, the size of the two differential water pressures can react strainer
The accumulating amount of dirt on 9, thus the pressure difference controller 203 can be utilized to control the work of above-mentioned driving device 4 and open electricity
Magnet valve 304.
Claims (8)
1. suspended matter filter plant in a kind of online water, including tank body (1), the two ends portion of the tank body (1) is respectively arranged with
Upper cover (2) and tank bottom (3), the lower part of the tank body (1) are additionally provided with discharge outlet (8)；The upper cover (2) is provided with water inlet
(201), the tank bottom (3) is provided with sewage draining exit (302), and the front position of the sewage draining exit (302) is provided with solenoid valve
(304), driving device (4) is additionally provided on the upper cover (2), driving device (4) lower end is provided with hollow blowdown and turns
Axis (5)；
The blowdown shaft (5) is perpendicularly inserted into the middle position in the tank body (1), the low side of the blowdown shaft (5) with
Sewage draining exit (302) connection；
It is cylindrical in shape centered on the blowdown shaft (5) inside the tank body (1) and strainer (9) is distributed with, the blowdown shaft (5)
Side wall the position of the correspondence strainer (9) is provided with hollow soup stick (6)；The one end of the soup stick (6) and the blowdown
Shaft (5) is connected, and the other end is provided with the suction nozzle (7) being in contact with the strainer (9),
It is characterized in that, the one end of the suction nozzle (7) is connected with the soup stick (6), the other end is provided with opening, described
The both sides of the openend of suction nozzle (7) are provided with internal gear (701), and the internal gear (701) is internally provided with and internal gear (701)
Matched pinion gear (704), setting rotation axis (702) between the pinion gear (704) of both sides, the rotation axis (702) along
Length direction is provided with scraping dirt brush (703)；
The driving device (4) rotates through blowdown shaft (5) driving internal gear (701).
2. suspended matter filter plant in water as described in claim 1 online, which is characterized in that the scraping dirt brush (703) be
The tooth socket that rotation axis (702) outer wall is alongst set.
3. suspended matter filter plant in online water as described in claim 1, which is characterized in that suction nozzle (7) openend
Both sides are both provided with strut (705), and the rotation axis (702) is rotatably arranged on the strut (705).
4. suspended matter filter plant in online water as described in claim 1, which is characterized in that the tank bottom (3) is additionally provided with
Scale removing mouth (301).
5. suspended matter filter plant in online water as described in claim 1, which is characterized in that the soup stick (6) is arranged at intervals
In the side wall of the blowdown shaft (5).
6. suspended matter filter plant in online water as described in claim 1, which is characterized in that set inside the tank body (1)
There is filter cylinder (10), the strainer (9) is laid on the inside of the filter cylinder (10).
7. suspended matter filter plant in online water as described in claim 1, which is characterized in that tank bottom (3) the bottom setting
There is pedestal (303).
8. such as suspended matter filter plant in the online water of claim 1~7 any one of them, which is characterized in that the water inlet
(201) water inlet pressure gauge (202) is provided with, the discharge outlet (8) is provided with discharge outlet pressure gauge (801), the water inlet
Pressure gauge (202) and discharge outlet pressure gauge (801) are connected with pressure difference controller (203), pressure difference controller (203) control
Make the driving device (4) and solenoid valve (304).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810044141.1A CN108176105A (en) | 2018-01-17 | 2018-01-17 | Suspended matter filter plant in a kind of online water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810044141.1A CN108176105A (en) | 2018-01-17 | 2018-01-17 | Suspended matter filter plant in a kind of online water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108176105A true CN108176105A (en) | 2018-06-19 |
Family
ID=62550824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810044141.1A Pending CN108176105A (en) | 2018-01-17 | 2018-01-17 | Suspended matter filter plant in a kind of online water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108176105A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113244680A (en) * | 2021-05-28 | 2021-08-13 | 李始强 | Sewage filtering device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201632120U (en) * | 2010-04-08 | 2010-11-17 | 甘肃大禹节水股份有限公司 | Rotary-absorbing self-cleaning type filter |
| CN203060935U (en) * | 2012-11-28 | 2013-07-17 | 石河子市金土地节水设备有限公司 | Self-cleaning type filter |
| CN104941283A (en) * | 2014-11-17 | 2015-09-30 | 自贡东方热能锅炉设备制造有限公司 | Backwashing water filter |
| CN205627266U (en) * | 2016-04-27 | 2016-10-12 | 中冶赛迪工程技术股份有限公司 | Blast furnace slag water filter equipment |
-
2018
- 2018-01-17 CN CN201810044141.1A patent/CN108176105A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201632120U (en) * | 2010-04-08 | 2010-11-17 | 甘肃大禹节水股份有限公司 | Rotary-absorbing self-cleaning type filter |
| CN203060935U (en) * | 2012-11-28 | 2013-07-17 | 石河子市金土地节水设备有限公司 | Self-cleaning type filter |
| CN104941283A (en) * | 2014-11-17 | 2015-09-30 | 自贡东方热能锅炉设备制造有限公司 | Backwashing water filter |
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Non-Patent Citations (1)
| Title |
|---|
| 聂新译: "《机械原理与机构学》", 30 June 1987, 科学技术文献出版社重庆分社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113244680A (en) * | 2021-05-28 | 2021-08-13 | 李始强 | Sewage filtering device |
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Application publication date: 20180619 |
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| WD01 | Invention patent application deemed withdrawn after publication |