CN106267959A - Rainwater initial filter device - Google Patents

Rainwater initial filter device Download PDF

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Publication number
CN106267959A
CN106267959A CN201610724416.7A CN201610724416A CN106267959A CN 106267959 A CN106267959 A CN 106267959A CN 201610724416 A CN201610724416 A CN 201610724416A CN 106267959 A CN106267959 A CN 106267959A
Authority
CN
China
Prior art keywords
electric magnet
valve
housing
scraper plate
connects
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610724416.7A
Other languages
Chinese (zh)
Other versions
CN106267959B (en
Inventor
林甬梁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haimianchengshi Rainwater Collection Utilization Technology Co Ltd
Original Assignee
Haimianchengshi Rainwater Collection Utilization Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Haimianchengshi Rainwater Collection Utilization Technology Co Ltd filed Critical Haimianchengshi Rainwater Collection Utilization Technology Co Ltd
Priority to CN201610724416.7A priority Critical patent/CN106267959B/en
Publication of CN106267959A publication Critical patent/CN106267959A/en
Application granted granted Critical
Publication of CN106267959B publication Critical patent/CN106267959B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11Filters 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
    • B01D29/31Self-supporting filtering elements
    • B01D29/35Self-supporting filtering elements arranged for outward flow filtration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/60Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/603Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by flow measuring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62Regenerating the filter material in the filter
    • B01D29/64Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6484Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a translatory movement with respect to the filtering element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88Filters 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
    • B01D29/94Filters 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F1/00Methods, systems, or installations for draining-off sewage or storm water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/40Liquid flow rate
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations

Abstract

The invention discloses rainwater initial filter device.The present invention is by with the comparison of the water yield in outlet pipe thus judging whether filter screen blocks to water inlet pipe in rainwater initial filter device, then drive such as obstruction scraper plate descending thus the obturator on filter screen is struck off, promoting valve to open simultaneously, make obturator enter blow-off pipe, then device resets.Thus in time the rainwater initial filter device blocked can be carried out cleaning to safeguard, so that the work that whole rainwater-collecting reutilization system energy longer-term is stable, more preferable alleviation urban water shortage and the pressure of sewerage system when a large amount of precipitation.

Description

Rainwater initial filter device
Technical field
The present invention relates to rainwater-collecting recycling field, particularly relate to rainwater initial filter device.
Background technology
Water, Source of life is a kind of extremely valuable resource.The water resource of China is not enriched, and there is the city of 2/3 in the whole nation Hydropenia.And along with the quickening of urbanization process, the water consumption of landscape water, road flushing, greening and carwash etc. in city is fast Speed growth making originally to seem with regard to nervous water resource and more lacking.Simultaneously because the propelling of urbanization makes more bottom surface various Building, road cover, so that rainwater cannot be seeped into underground down, increase the weight of the pressure of sewerage system.In recent years, usually listen Also not at all surprising to the report of urban waterlogging.One method of the problems referred to above to be solved is to dropping to carrying out with water of city Collect and recycling.Be supplied to urban look water after so being processed by rainwater-collecting, road rinses, afforest, flush the toilet and wash in one's power On the one hand cars etc. use, and alleviate the pressure of water resource, the most also can by rainwater-collecting module store rainwater from And alleviate the pressure of sewerage system, reduce the generation of urban waterlogging.Rainwater catchment system.The pollution in city is the tightest at present Weight, the recycling of collecting of rainwater carries out the filtration, purification of necessity with regard to inevitable requirement to rainwater.And currently used defecator bag Including housing and arrange Hanging Basket in the housing, the solid pollutant that rainwater strengthens after entering Hanging Basket is filtered out, and uses one section After time, Hanging Basket will gradually be contaminated thing blocking, thus needs to clear up Hanging Basket.It is generally with artificial side at present Hanging Basket is cleared up by formula, and labor cleaning is carried out by regularly mode often, and such mode bad, sometimes clear up Time Hanging Basket be not required to cleaning, Hanging Basket has blocked to lack and has been less than clearance time again thus the impact Collection utilization to rainwater sometimes.
Summary of the invention
In order to overcome drawbacks described above and the not enough present invention to provide techniques below scheme: rainwater initial filter device, including housing, on Lid, valve, filter screen, scraper plate, connecting plate, guide rod, guide pin bushing, switch, gear A, driving motor, speed regulator, control module, described shell Body is the cylindrical body of upper and lower opening, and the top of described housing sidewall is provided with water inlet pipe, and the bottom of described housing sidewall is provided with water outlet Pipe, described water inlet pipe is identical with diameter of outflow tube, and is equipped with impeller in it, and described impeller connects TRT, institute respectively State TRT and connect the size of magnetic force produced by electric magnet A and electric magnet B, electric magnet A and electric magnet B by wire respectively Only being additionally provided with hollow cabin with being passed through in current related described housing sidewall therein, described electric magnet A and electric magnet B is respectively provided with In described hollow cabin, being additionally provided with described guide pin bushing in described hollow cabin, described guide rod inserts in described guide pin bushing, and can be along leading Slidably, one end of described guide rod connects described connecting plate to set, relative with the face connecting described guide rod on described connecting plate Connecting two pieces of permanent magnets on face, a spring housing is located on described guide rod, and its one end withstands on described guide pin bushing, and the other end withstands on described On connecting plate, when described electric magnet A and electric magnet B no power, described permanent magnet withstands on described electric magnet A's and electric magnet B respectively One end, during energising, described electric magnet A makes the described connecting plate described spring of oriented compression to withstanding on permanent magnet thereon production repulsion Direction motion trend, described electric magnet B to withstand on described permanent magnet thereon produce gravitation make the oriented institute of described connecting plate Stating the trend of the direction motion of spring relaxation, be additionally provided with described switch in described hollow cabin, described switch is just to described guide rod Free end, described housing upper is provided with upper cover, and the bottom of described housing is provided with the two described valve of fan, described valve and described shell Body joins, and described valve hinged place is additionally provided with torsion spring, and described valve connects with blow-off line, and described filter screen becomes tubular dismountable Being fixed in described housing, described scraper plate is arranged in described filter screen ringwise, and described scraper plate outer surface is close to described filter screen Inner surface, described scraper plate upper surface is not higher than described filter screen upper surface, hinged two connecting rods, described company on described scraper plate lower surface The other end of bar is respectively hinged on described valve, and described scraper plate upper surface connects one " n " font connecting rod, in described connecting rod Connecting a tooth bar, described tooth bar passes described upper cover, and described upper cap upper surface is provided with described driving motor, and described driving motor is even Connecing described speed regulator, described speed regulator connects described gear A, and described gear A engages with described tooth bar.
As preferably, one fans the face contacted on described valve with another fan valve is provided with sealing strip the most together.
Compared with prior art, the method have the advantages that the present invention is by intaking in rainwater initial filter device Pipe is with the comparison of the water yield in outlet pipe thus judges whether filter screen blocks, as block then driving scraper plate descending thus by filter screen Obturator strikes off, and promotes valve to open simultaneously, makes obturator enter blow-off pipe, and then device resets.Thus can be the most right The rainwater initial filter device blocked carries out cleaning to be safeguarded, so that the work that whole rainwater-collecting reutilization system energy longer-term is stable Make, more preferable alleviation urban water shortage and the pressure of sewerage system when a large amount of precipitation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the specific embodiment of the invention.
Fig. 2 is A portion enlarged drawing.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is elaborated.
As it is shown in figure 1, rainwater initial filter device, including housing 1, upper cover 17, valve 4, filter screen 2, scraper plate 18, connecting plate 13, Guide rod 10, guide pin bushing 11, switch 9, gear A 15, driving motor, speed regulator, control module, described housing 1 is the cylinder of upper and lower opening Shape body, the top of described housing 1 sidewall is provided with water inlet pipe 1a, and the bottom of described housing 1 sidewall is provided with outlet pipe 1b, described water inlet Pipe 1a is identical with outlet pipe 1b diameter, and is equipped with impeller 5 in it, and described impeller 5 connects TRT 6 respectively, described Electric installation 6 connects magnetic force produced by electric magnet A14 and electric magnet B7, electric magnet A14 and electric magnet B7 by wire respectively Size is only additionally provided with hollow cabin, described electric magnet A14 and electric magnet with being passed through on current related described housing 1 sidewall therein B7 is arranged in described hollow cabin, is additionally provided with described guide pin bushing 11 in described hollow cabin, described guide rod 10 insert described in lead In set 11, and can along guide pin bushing 11 slidably, one end of described guide rod 10 connects described connecting plate 13, on described connecting plate 13 with Connecting and connect two pieces of permanent magnets 8 on the face that the face of described guide rod 10 is relative, a spring 12 is set on described guide rod 10, its one end Withstanding on described guide pin bushing 11, the other end withstands on described connecting plate 13, described in when described electric magnet A14 and electric magnet B7 no power Permanent magnet 8 withstands on described electric magnet A14 and one end of electric magnet B7 respectively, and during energising, described electric magnet A14 is thereon to withstanding on Permanent magnet 8 produces the trend that repulsion makes the direction of the described connecting plate 13 described spring of oriented compression 12 move, described electric magnet B7 Becoming of direction motion that gravitation makes the oriented described spring 12 of described connecting plate 13 loosen is produced to withstanding on described permanent magnet 8 thereon Gesture, is additionally provided with described switch 9 in described hollow cabin, described switch 9 just free end to described guide rod 10, on described housing 1 Portion is provided with upper cover 17, and the bottom of described housing 1 is provided with the two described valve of fan 4, and described valve 4 joins with described housing 1, described work Door 4 hinged places are additionally provided with torsion spring, and one fans the face contacted on described valve 4 with another fan valve 4 is provided with one or multi-channel sealing Bar 4a, described valve 4 connects with blow-off line, and described filter screen 2 becomes tubular to be detachably mounted in described housing 1, described in scrape Plate 18 is arranged in described filter screen 2 ringwise, and described scraper plate 18 outer surface is close to described filter screen 2 inner surface, described scraper plate 18 Upper surface is not higher than described filter screen 2 upper surface, hinged two connecting rods 3, the other end of described connecting rod 3 on described scraper plate 18 lower surface Being respectively hinged on described valve 4, described scraper plate 18 upper surface connects one " n " font connecting rod, and described connecting rod connects one Tooth bar, described tooth bar passes described upper cover 17, and described upper cap upper surface is provided with described driving motor, and described driving motor connects institute Stating speed regulator, described speed regulator connects described gear A 15, and described gear A 15 engages with described tooth bar.
When rainwater initial filter device normally works, the magnetic picture produced in two electric magnet A14 and electric magnet B7 is same, and they are right The amount of force equidirectional of connecting plate 13 is cancelled out each other on the contrary, and connecting plate 13 drives two blocks of permanent magnetism under the effect of spring 12 Body 8 withstands on two electric magnet, and the free end of guide rod 10, not in contact with switch 9, drives motor not work, and scraper plate 18 is in situ, Valve 4 is closed, and remains off under the effect of torsion spring.When rainwater initial filter device blocks, the current in water inlet pipe 1a Amount is more than the discharge in outlet pipe 1b, and the repulsion that the permanent magnet on connecting plate 13 is produced by such electric magnet A14 is more than electromagnetism The gravitation that permanent magnet on connecting plate 13 is produced by ferrum B7, when connecting plate 13 is more than electric magnet B7's at the repulsion of electric magnet A14 Gravitation and when making a concerted effort of spring force, connecting plate 13 drives guide rod 10 to move near the direction of switch 9, at guide rod 10 at switch Switching 9 after 9 contacts to be switched on, send signal to control module, control module controls to drive electrical power work, driven gear A15 rotates, and promotes tooth bar to move downward, and tooth bar promotes scraper plate 18 to move downward the dirt scraping on filter screen 2 by connecting rod, Scraper plate 18 promotes valve 4 to rotarily open by connecting rod 3 simultaneously, tightens torsion spring simultaneously, and dirt is drained by blow-off pipe.Then drive Motor power-off quits work, and valve 4 closes under the effect of torsion spring restoring force, promotes scraper plate 18 band carry-over bar to reset simultaneously.This Time filter screen 2 no longer block, in electric magnet A14 and electric magnet B7 produce magnetic force size recovery identical, connecting plate 13 is at spring 12 Effect is lower to be resetted.It is more than owing to switching the difference of 9 gravitation only produced with electric magnet B7 at the repulsion produced as electric magnet A14 Just can be unlocked during the elastic force of spring 12, thus occur signal to open valve 4 automatic pollution discharge, thus can be by regulation spring The elastic force of 12 controls when to open valve 4, thus reaches the balance of optimal collection efficiency and lifetime of system.
Below to the present invention have been described in detail, but the invention is not limited in specific embodiment party described herein Formula.It will be appreciated by those skilled in the art that in the case without departing from the scope of the present invention, may be made that other changes and deformation.This Bright protection domain is defined by the following claims.

Claims (2)

1. rainwater initial filter device, including housing (1), upper cover (17), it is characterised in that described rainwater initial filter device also includes valve (4), filter screen (2), scraper plate (18), connecting plate (13), guide rod (10), guide pin bushing (11), switch (9), gear A (15), drive motor, Speed regulator, control module, described housing (1) is the cylindrical body of upper and lower opening, and the top of described housing (1) sidewall is provided with water inlet pipe (1a), the bottom of described housing (1) sidewall is provided with outlet pipe (1b), and described water inlet pipe (1a) is identical with outlet pipe (1b) diameter, And in it, it being equipped with impeller (5), described impeller (5) connects TRT (6) respectively, and described TRT (6) passes through respectively Wire connect electric magnet A(14) and electric magnet B(7), electric magnet A(14) and electric magnet B(7) produced by magnetic force size only with It is passed through on current related described housing (1) sidewall therein and is additionally provided with hollow cabin, described electric magnet A(14) and electric magnet B(7) Being arranged in described hollow cabin, be additionally provided with described guide pin bushing (11) in described hollow cabin, described guide rod (10) inserts described In guide pin bushing (11), and can along guide pin bushing (11) slidably, one end of described guide rod (10) connects described connecting plate (13), described company Connecting two pieces of permanent magnets (8) on the face that fishplate bar (13) face that is upper and that connect described guide rod (10) is relative, a spring (12) is set in On described guide rod (10), its one end withstands on described guide pin bushing (11), and the other end withstands on described connecting plate (13), described electric magnet A(14) and electric magnet B(7) no power time described permanent magnet (8) withstand on described electric magnet A(14 respectively) and electric magnet B(7) one End, described electric magnet A(14 during energising) to withstand on permanent magnet thereon (8) produce repulsion make described connecting plate (13) oriented compression The trend of the direction motion of described spring (12), described electric magnet B(7) to withstanding on described permanent magnet (8) thereon production gravitation The trend moved in the direction making the oriented described spring of described connecting plate (13) (12) loosen, is additionally provided with described in described hollow cabin Switch (9), described switch (9) just free end to described guide rod (10), described housing (1) top is provided with upper cover (17), described The bottom of housing (1) is provided with the described valve of two fan (4), and described valve (4) joins with described housing (1), and described valve (4) is hinged Place is additionally provided with torsion spring, and described valve (4) connects with blow-off line, and described filter screen (2) becomes tubular to be detachably mounted to described shell In body (1), described scraper plate (18) is arranged in described filter screen (2) ringwise, and described scraper plate (18) outer surface is close to described filter Net (2) inner surface, described scraper plate (18) upper surface is not higher than described filter screen (2) upper surface, and described scraper plate (18) lower surface is cut with scissors Connecing two connecting rods (3), the other end of described connecting rod (3) is respectively hinged on described valve (4), and described scraper plate (18) upper surface is even Connecing one " n " font connecting rod, described connecting rod connects a tooth bar, described tooth bar passes described upper cover (17), described on cover Surface is provided with described driving motor, and described driving motor connects described speed regulator, and described speed regulator connects described gear A (15), Described gear A (15) engages with described tooth bar.
Rainwater initial filter device the most according to claim 1, it is characterised in that one fans described valve (4), and above and another fans valve (4) face contacted is provided with at least one sealing strip (4a).
CN201610724416.7A 2016-08-26 2016-08-26 Rainwater initial filter device Active CN106267959B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN106267959B CN106267959B (en) 2018-04-06

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108640445A (en) * 2018-07-16 2018-10-12 佛山市己阿已磁电设备有限公司 A kind of excreta solid-liquid efficient separation method and device
CN108689580A (en) * 2018-07-23 2018-10-23 佛山市己阿已磁电设备有限公司 A kind of excreta centralized processing method and device
CN110255790A (en) * 2019-06-26 2019-09-20 安徽维诚水务科技有限公司 A kind of purification reutilization system of rainwater-collecting
CN111760349A (en) * 2020-07-06 2020-10-13 青海省农林科学院 Microbial pesticide preparation filter equipment
CN113074078A (en) * 2021-05-11 2021-07-06 周玮 Tidal rising and falling equidirectional power generation equipment for ocean engineering power supply

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201949711U (en) * 2011-02-17 2011-08-31 上海大屯能源股份有限公司 Sundry filter of water spraying device
CN103696481A (en) * 2014-01-09 2014-04-02 广州市设计院 Rainwater regulating, storing and recycling system
JP2014213241A (en) * 2013-04-24 2014-11-17 凸版印刷株式会社 Concentric circle spring filter for filtration and processing method
CN205296276U (en) * 2016-01-08 2016-06-08 宁波畅虹雨水科技有限公司 Rainwater retaining module
CN205444417U (en) * 2016-04-01 2016-08-10 黄媛媛 Can be according to sewer well lid of rainfall automatic control inflow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201949711U (en) * 2011-02-17 2011-08-31 上海大屯能源股份有限公司 Sundry filter of water spraying device
JP2014213241A (en) * 2013-04-24 2014-11-17 凸版印刷株式会社 Concentric circle spring filter for filtration and processing method
CN103696481A (en) * 2014-01-09 2014-04-02 广州市设计院 Rainwater regulating, storing and recycling system
CN205296276U (en) * 2016-01-08 2016-06-08 宁波畅虹雨水科技有限公司 Rainwater retaining module
CN205444417U (en) * 2016-04-01 2016-08-10 黄媛媛 Can be according to sewer well lid of rainfall automatic control inflow

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108640445A (en) * 2018-07-16 2018-10-12 佛山市己阿已磁电设备有限公司 A kind of excreta solid-liquid efficient separation method and device
CN108689580A (en) * 2018-07-23 2018-10-23 佛山市己阿已磁电设备有限公司 A kind of excreta centralized processing method and device
CN110255790A (en) * 2019-06-26 2019-09-20 安徽维诚水务科技有限公司 A kind of purification reutilization system of rainwater-collecting
CN110255790B (en) * 2019-06-26 2022-02-01 安徽维诚水务科技有限公司 Purification and reuse system for rainwater collection
CN111760349A (en) * 2020-07-06 2020-10-13 青海省农林科学院 Microbial pesticide preparation filter equipment
CN113074078A (en) * 2021-05-11 2021-07-06 周玮 Tidal rising and falling equidirectional power generation equipment for ocean engineering power supply

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