CN202605826U - Full-automatic backwashing filtering device - Google Patents

Full-automatic backwashing filtering device Download PDF

Info

Publication number
CN202605826U
CN202605826U CN 201220223468 CN201220223468U CN202605826U CN 202605826 U CN202605826 U CN 202605826U CN 201220223468 CN201220223468 CN 201220223468 CN 201220223468 U CN201220223468 U CN 201220223468U CN 202605826 U CN202605826 U CN 202605826U
Authority
CN
China
Prior art keywords
full
filter screen
treatment plant
tubular filter
water treatment
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.)
Expired - Fee Related
Application number
CN 201220223468
Other languages
Chinese (zh)
Inventor
葛牧
周春风
朱曦
王兴伟
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.)
Nanjing Genesis Electric Automation Equipment Co Ltd
Original Assignee
Nanjing Genesis Electric Automation Equipment 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 Nanjing Genesis Electric Automation Equipment Co Ltd filed Critical Nanjing Genesis Electric Automation Equipment Co Ltd
Priority to CN 201220223468 priority Critical patent/CN202605826U/en
Application granted granted Critical
Publication of CN202605826U publication Critical patent/CN202605826U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Filtration Of Liquid (AREA)

Abstract

The utility model discloses a full-automatic backwashing filtering device which comprises a shell (1), an internal water chamber (2), a tubular filter screen (3), a backwashing device (4), an electric device (5), a muddy water inlet pipe (6), a purified water outlet pipe (7), a differential pressure transmitter (8), a blowdown pipe, and a blowdown valve (9), wherein the internal water chamber (2) is arranged in the shell (1), the tubular filter screen (3) is arranged in the internal water chamber (2), the backwashing device (4) is arranged at the upper end and the lower end of the tubular filter screen (3), the electric device (5) is arranged at the upper end of the shell (1) and used for driving the backwashing device (4), the differential pressure transmitter (8) is arranged on the shell (1), the blowdown pipe and the blowdown valve (9) thereof are arranged at the bottom of the shell (1), the internal water chamber (2) is of a circular cylinder, holes are arranged in the upper end surface and the lower end surface, a water outlet communicated with the purified water outlet pipe (7) is arranged in the side surface, and the differential pressure transmitter (8) is connected with an electric cabinet. The full-automatic backwashing filtering device is reasonable in structure design, convenient to install, large in overflowing area, small in overflowing resistance, small in pressure loss, good in filtering effect and wide in use range.

Description

A kind of full-automatic back washing water treatment plant
Technical field
The utility model relates to a kind of water treatment plant, is specifically related to a kind of industries such as power station, chemical industry, iron and steel, municipal administration that relate to, the full-automatic back washing water treatment plant of the coarse filtration of similar suspension such as cooling water, industrial circulating water, fire demand water and smart filter.
Background technology
The reinforcement of Along with people's environmental consciousness; The various places distribution of water resources is unreasonable; The water resource purified treatment is become the project that various countries advocate energetically, and various drainage purifying processing device is in continuous update, still there are following many deficiencies in the water filter of prior art at present:
1, the turbid liquid chamber of water filter and stillness of night chamber are all adopted split typely, middle are connected by flange bolt, and its volume is comparatively huge, and on-the-spot the layout takes up room greatlyyer, to the position of limited space, installs comparatively difficulty.
2, the water inlet of existing water filter and delivery port center make troubles for the pipeline connection of on-the-spot intake-outlet not on same horizontal line.
3, most flat screen pack or the cylinder of adopting of existing water filter separated screen pack, and it is little that it filters effective area, so it is big to cross flow resistance, hydraulic pressure that need be enough could be practical, and usage range is narrow.When cleaning blocked filter screen, outlet hydraulic pressure fall is big, influences the stability of it and even the operation of whole water system.
4, existing part water filter also has the tubular filter screen of employing to filter, and turbid liquid chamber separates with the clear liquid chamber, unreasonable structure but it designs; Cause tubular filter screen when filtering, an end job is only arranged, other end shutoff; Therefore its area of passage is less, fails to give full play to its high efficiency filter efficacy.During its automatic backwash device busy, only shutoff has been carried out in the lower end of tubular filter screen, the upper end of tubular filter screen becomes the flushing dead angle during flushing, can't thoroughly wash.
5, existing water filter adopts differential pressure switch that it is carried out pressure reduction control mostly, and its pressure differential detection is insensitive, and the adjustment linearity is bad, and precision and stable not high defective are brought many maloperations to automatic control system.
Therefore be necessary that again on the basis of prior art, a kind of space structure of research and design is little, on-the-spot easy for installation, flow resistance is little, and the pressure loss is little, and the scope of application is more wide in range, cleans the good full-automatic back washing water treatment plant of filth-discharging effect.
Summary of the invention
Goal of the invention: the purpose of the utility model is in order to solve the deficiency of prior art; A kind of reasonable in design, easy for installation is provided, and flow resistance is little, and the pressure loss is little; The scope of application is more wide in range; Filter efficiency is high, and it is good to clean filth-discharging effect, the full-automatic back washing water treatment plant that automaticity is high.
Technical scheme: in order to realize above purpose, the technical scheme that the utility model is taked is:
A kind of full-automatic back washing water treatment plant, it comprises: housing is installed in the interior hydroecium in the housing; Be installed in the tubular filter screen in the interior hydroecium, be installed in the back purge system of tubular filter screen upper/lower terminal, be installed in the housing upper end; Be used to drive the electric device of back purge system, muddy water water inlet pipe, water purification outlet pipe; Be installed in the differential pressure on the housing and send device, be opened in the blow-off pipe and the blowoff valve thereof of housing bottom, described interior hydroecium is the annular cylindrical shell; Both ends of the surface have the hole up and down, and the side has the apopore that is connected with the water purification outlet pipe, and described differential pressure also send device to link to each other with electrical control cubicles.
As preferred version, above-described full-automatic back washing water treatment plant is equipped with 10 to 50 tubular filter screens in the described interior hydroecium at interval; The tubular filter screen of respective numbers can certainly be installed according to actual needs; The spacing of each tubular filter screen is preferably 0.5 to 25mm, has the high advantage of filter efficiency, and interior hydroecium is equipped with removable tens tubular filter screens; When certain root tubular filter screen takes place by dirty blocking up, do not influence its operate as normal yet.
As preferred version, above-described full-automatic back washing water treatment plant, the polygon cylindricality skeleton that described tubular filter screen is made up of trapezoidal wire, the outside forms the V-type drainage trap with the coiling roll welding spirally of continuous V-arrangement stainless steel wire and processes on skeleton; Tubular filter screen is used for the suspended material of filtering water; Muddy water gets into the two ends of tubular filter screen from the muddy water water inlet pipe, and the water purification that filters through tubular filter screen flows out hydroecium in getting into by the mesh of tubular filter screen; And then the apopore through interior hydroecium side, arrive the water purification outlet pipe and outwards carry water purification.The mesh area of the described tubular filter screen of the utility model is 3~10 times with the caliber area ratio of muddy water water inlet pipe, and this structure makes that water resistance is less in the filter, when fluid is unclean, and can blockage phenomenon; Tubular filter screen adopts stainless steel material to process, and decay resistance is strong; And tubular filter screen adopts advanced V-type drainage trap; Be to be around on the rib with special V-type steel wire spiral; Contact is spot welding or roll welding; Separation angle can make the adverse current of backflow than the solids and the suspension that are easier to remove gathering, thus can avoid knitting element (traditional filter screen) intrinsic fixed effect, also can avoid solids to embed on the orifice plate side shortcoming of (traditional filter screen) in the parallel hole.
As preferred version; Above-described full-automatic back washing water treatment plant; Described interior hydroecium both ends of the surface up and down has 10 to 50 holes, make things convenient for the installation of tubular filter screen, and the side of interior hydroecium has the apopore that diameter is 200mm to 800mm; Apopore links to each other with the water purification outlet pipe, thereby can muddy water that get into from the muddy water water inlet pipe and the clear water that passes through after tubular filter screen filters be separated.
As preferred version, above-described full-automatic back washing water treatment plant, described back purge system comprise upper and lower two groups of sealing cleaning heads and revolution cleaning arm; The envelope cleaning head of back purge system and the aperture, two ends of tubular filter screen are aimed at, and sewage can't get in the tubular filter screen, thereby form negative pressure in the tubular filter screen; Under the effect of interior hydroecium water pressure, the water reverse flow in the tubular filter screen makes the dirt in the filter screen V-shaped groove break away from chimney filter shape filter screen; And be free in the water of chimney filter, and, discharge through electronic sewage draining valve place through back purge system; As preferably in order to improve the cleaning pollution discharge capability; Can in blowoff line, set up a dredge pump, increase the negative pressure that is cleaned in the tubular filter screen, improve and clean filth-discharging effect.Every tubular filter screen in the internal hydroecium of order cleans automatically successively, finishes to stop automatically until a cleaning frequency.
As preferred version, above-described full-automatic back washing water treatment plant, described housing bottom has discharge water pipeline and Draw off valve thereof.Since in the recirculated water except that containing suspension and graininess foreign material; Also has part silt; In the full-automatic back washing water treatment plant long-time running process; Part silt can be deposited in the bottom bulkhead of full-automatic back washing water treatment plant, after housing bottom has discharge water pipeline and Draw off valve thereof, can remove the silt, solid particle and other foreign material that are deposited in the bottom bulkhead; And be convenient to the water in the full-automatic back washing water treatment plant is emitted during maintenance, practice thrift the repair time, increase work efficiency.
As preferred version; Above-described full-automatic back washing water treatment plant, the upper and lower manhole that is provided with of housing, manhole is installed after; When maintenance, be convenient to observe full-automatic back washing water treatment plant inner case; And be convenient to adjust the gap at back purge system and tubular filter screen two ends, guarantee the water filtration quality, be convenient to change the rapid wear attrition component in addition.
As preferred version, above-described full-automatic back washing water treatment plant is provided with supporting leg in lower part of frame, as preferably being provided with 4 supporting legs altogether, be distributed on lower housing portion around, be used to support the utility model full-automatic back washing water treatment plant.
The described full-automatic back washing water treatment plant of the utility model, wherein differential pressure transmitter is installed in the outside of housing, is to insert respectively in sewage and the water purification with two stainless steel tubes; Measure pressure difference signal by differential pressure transmitter, send electrical control cubicles to, carry out control command by switch board; After receiving the backwash instruction; Electronic sewage draining valve is opened automatically, under the effect of interior hydroecium water pressure, and the water reverse flow in the tubular filter screen; Make dirt in the filter screen V-shaped groove break away from chimney filter shape filter screen and be free in and carry out backwash in the water of chimney filter, get rid of from electronic sewage draining valve.
The described full-automatic back washing water treatment plant of the utility model wherein is installed in the housing upper end, is used to drive the electric device of back purge system; Can forward and reversely rotate, stable, and can satisfy frequent start-stop; After receiving the pressure reduction alarm signal of differential pressure transmitter, start, behind the motor start-up, the motor output speed is descended through reductor; The power transmission shaft rotation drives back purge system and rotates; The location back purge system lets back purge system accurately be stuck in the two ends of tubular filter screen, and sewage can't be got in the tubular filter screen, in tubular filter screen, forms negative pressure, carries out backwash.
The utility model full-automatic back washing water treatment plant is provided with the perfect automatic control system, can realize operation functions such as " manually ", " automatically ".When the control knob of switch board was screwed into " manually " position, operating personnel can realize the control to electric device, electronic blowoff valve etc. respectively through knobs such as starting and stop." manually " function is mainly used when device debugging, maintenance and abnormal operating state.When electrical control cubicles control knob is screwed into " automatically " position; Device just drops into the operation of full-automatic state:
Figure 2012202234683100002DEST_PATH_IMAGE002
pressure reduction measured when differential pressure transmitter during less than setting value, electric device, electronic sewage draining valve are in halted state.The pressure differential that
Figure DEST_PATH_IMAGE004
measures sewage chamber and water purifying chamber when differential pressure transmitter is during greater than setting value; The control system starts electric device automatically; And open electronic sewage draining valve; Device gets into automatic cleaning state, the anti-cleaning of order successively of all tubular filter screens.When two tubular filter screen backwashes wherein, other tubular filter screen operate as normal, the state that cleans automatically stops during less than setting value up to the pressure differential of sewage chamber and water purifying chamber automatically.In addition, equipment is provided with regularly anti-cleaning procedure, can regularly start anti-cleaning according to the predefined time cycle, and anti-scavenging period is adjustable.And the utility model full-automatic back washing water treatment plant is provided with protective device, and very poor when water quality, dirt is a lot of in the water; Clean drainage when being difficult to bear, the pressure reduction that differential pressure transmitter is measured is during greater than the design definite value, and reducing motor and dredge pump shut down; Send the sound and light alarm signal simultaneously; Operating personnel can remove with knob and report to the police, and shutdown inspection is fixed a breakdown.
Beneficial effect: the described full-automatic back washing water treatment plant of the utility model is compared with prior art and is had the following advantages:
1, the full-automatic back washing water treatment plant reasonable in design that the utility model provided combines turbid liquid chamber and clear liquid chamber, forms a unified integral body, and volume reduces greatly, and it is less to take up room, convenient on-the-spot installing and using; And water inlet and water outlet be also on same horizontal line, and be more convenient during on-the-spot line arrangement; Its tubular filter screen upper and lower port all can be intake, and its area of passage has increased by 1 times than original design, and it is little to cross flow resistance; The pressure loss is little, and the scope of application is more wide in range, when the dirt of part tubular filter screen is stifled serious; Still do not influence the operate as normal of whole equipment, given full play to filter efficacy;
2, the full-automatic back washing water treatment plant that the utility model provided, wherein back purge system can carry out shutoff to upper and lower two ports of tubular filter screen simultaneously, under the effect of interior hydroecium water pressure; Water reverse flow in the tubular filter screen makes the dirt in the filter screen V-shaped groove break away from chimney filter shape filter screen, and is free in the water of chimney filter; And pass through back purge system; Discharge through electronic sewage draining valve place, improve and clean filth-discharging effect, do not have the flushing dead angle; And the adverse current that can make backflow is than the solids that are easier to remove gathering, and backwash effect is good.
3, the full-automatic back washing water treatment plant that the utility model provided; Wherein pass through multiple control modes to electric cabinet input action signal; Be implemented in the anti-automatically cleaning of line traffic control, be provided with by differential pressure and clean automatically and two kinds of automatic cleaning control modes of timing automatic cleaning, automaticity is high.
4, the full-automatic back washing water treatment plant that the utility model provided, shock resistance, good corrosion resistance; Long service life, cost and maintenance cost are cheap; And inflow-rate of water turbine is constant, can satisfy the requirement of stable operation reliably and with long-term continuously.
Description of drawings
The structural representation of the full-automatic back washing water treatment plant that Fig. 1 provides for the utility model.
Fig. 2 is along the structural representation of the cross section of A-A direction among Fig. 1.
The structural representation of the back purge system in the full-automatic back washing water treatment plant that Fig. 3 provides for the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the utility model; Should understand these embodiment only be used to the utility model is described and be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.
Extremely shown in Figure 3 like Fig. 1, a kind of full-automatic back washing water treatment plant, it comprises: housing (1); Be installed in the interior hydroecium (2) in the housing (1), be installed in the tubular filter screen (3) in the interior hydroecium (2), be installed in the back purge system (4) of tubular filter screen (3) upper/lower terminal; Be installed in housing (1) upper end, be used to drive the electric device (5) of back purge system (4), muddy water water inlet pipe (6); Water purification outlet pipe (7) is installed in the differential pressure on the housing (1) and send device (8), is opened in the blow-off pipe and the blowoff valve (9) thereof of housing (1) bottom; Hydroecium (2) is the annular cylindrical shell in described; Both ends of the surface have the hole up and down, and the side has the apopore that is connected with water purification outlet pipe (7), and described differential pressure also send device (8) to link to each other with electrical control cubicles.
Above-described full-automatic back washing water treatment plant is equipped with 10 to 50 tubular filter screens (3) in the described interior hydroecium (2) at interval.
Above-described full-automatic back washing water treatment plant; The polygon cylindricality skeleton that described tubular filter screen (3) is made up of trapezoidal wire; The outside forms the V-type drainage trap with the coiling roll welding spirally of continuous V-arrangement stainless steel wire and processes on skeleton, the total open area of described tubular filter screen (3) is 3 ~ 10 times of muddy water water inlet pipe (6) caliber area.
Above-described full-automatic back washing water treatment plant, described interior hydroecium (2) both ends of the surface up and down has 10 to 50 holes, and the diameter that the side has apopore is 200mm to 800mm.
Above-described full-automatic back washing water treatment plant is characterized in that, described back purge system (4) comprises that two groups seal cleaning heads (4-1) and revolution cleaning arm (4-2) up and down.
Above-described full-automatic back washing water treatment plant, described housing (1) bottom has discharge water pipeline and Draw off valve (10) thereof.
Above-described full-automatic back washing water treatment plant is characterized in that, the upper and lower manhole (11) that is provided with of housing (1).
Above-described full-automatic back washing water treatment plant is provided with 4 supporting legs (12) in the bottom of housing (1).
In the full-automatic back washing water treatment plant actual moving process that the utility model provides:
1, automatic fitration: sewage is got in the housing (1) by muddy water water inlet pipe (6) under the effect of water circulating pump water intaking pressure, again by the two ends of some tubular filter screens (3); Get into tubular filter screen (3); Suspending sundries in the water is intercepted in the tubular filter screen (3), and water purification is gone into interior hydroecium (2) by the V-type concentrated flow of tubular filter screen (3), and the apopore by interior hydroecium (2) side flows out again; Get into water purification outlet pipe (7) output water purification, so just reached the purpose of drainage.
2, automatic backwash: behind tubular filter screen (3) work certain hour, its slotted eye is by part stolen goods fouling, and water resistance increases gradually.When water resistance increases to certain numerical value, form pressure differential between housing (1) and the interior hydroecium (2), when differential pressure transmitter (8) detects this pressure reduction; Be sent to switch board, electrical control cubicles is sent instruction, starts electric device (5); Drive back purge system (4) rotation, and open the blow-off pipe and the blowoff valve (9) thereof of housing (1) bottom simultaneously, electric device (5) drives revolution cleaning arm (4-2) rotation of back purge system (4); Make sealing cleaning head (4-1) aim at the two ends of tubular filter screen (3), electric device this moment (5) stops, thereby the sealing cleaning head (4-1) of back purge system (4) and the aperture, two ends of tubular filter screen (3) are aimed at; Sewage can't get in the tubular filter screen (3); Thereby form negative pressure in the tubular filter screen (3), and under the effect of interior hydroecium (2) water pressure, the water reverse flow in the tubular filter screen (3); Make the dirt in the filter screen V-shaped groove break away from chimney filter shape filter screen (3); And be free in the water of chimney filter, discharge through electronic blow-off pipe and blowoff valve (9) thereof, accomplish automatic backwash.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.

Claims (8)

1. a full-automatic back washing water treatment plant is characterized in that it comprises: housing (1); Be installed in the interior hydroecium (2) in the housing (1), be installed in the tubular filter screen (3) in the interior hydroecium (2), be installed in the back purge system (4) of tubular filter screen (3) upper/lower terminal; Be installed in housing (1) upper end, be used to drive the electric device (5) of back purge system (4), muddy water water inlet pipe (6); Water purification outlet pipe (7) is installed in the differential pressure on the housing (1) and send device (8), is opened in the blow-off pipe and the blowoff valve (9) thereof of housing (1) bottom; Hydroecium (2) is the annular cylindrical shell in described; Both ends of the surface have the hole up and down, and the side has the apopore that is connected with water purification outlet pipe (7), and described differential pressure also send device (8) to link to each other with electrical control cubicles.
2. full-automatic back washing water treatment plant according to claim 1 is characterized in that, in the described interior hydroecium (2) 10 to 50 tubular filter screens (3) is installed at interval.
3. full-automatic back washing water treatment plant according to claim 1; It is characterized in that; The polygon cylindricality skeleton that described tubular filter screen (3) is made up of trapezoidal wire; The outside forms the V-type drainage trap with the coiling roll welding spirally of continuous V-arrangement stainless steel wire and processes on skeleton, the total open area of described tubular filter screen (3) is 3 ~ 10 times of muddy water water inlet pipe (6) caliber area.
4. full-automatic back washing water treatment plant according to claim 1 is characterized in that, described interior hydroecium (2) both ends of the surface up and down has 10 to 50 holes, and the diameter that the side has apopore is 200mm to 800mm.
5. full-automatic back washing water treatment plant according to claim 1 is characterized in that, described back purge system (4) comprises that two groups seal cleaning heads (4-1) and revolution cleaning arm (4-2) up and down.
6. full-automatic back washing water treatment plant according to claim 1 is characterized in that, described housing (1) bottom has discharge water pipeline and Draw off valve (10) thereof.
7. according to each described full-automatic back washing water treatment plant of claim 1 to 6, it is characterized in that the upper and lower manhole (11) that is provided with of housing (1).
8. full-automatic back washing water treatment plant according to claim 7 is characterized in that, is provided with supporting leg (12) in the bottom of housing (1).
CN 201220223468 2012-05-18 2012-05-18 Full-automatic backwashing filtering device Expired - Fee Related CN202605826U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220223468 CN202605826U (en) 2012-05-18 2012-05-18 Full-automatic backwashing filtering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220223468 CN202605826U (en) 2012-05-18 2012-05-18 Full-automatic backwashing filtering device

Publications (1)

Publication Number Publication Date
CN202605826U true CN202605826U (en) 2012-12-19

Family

ID=47339560

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220223468 Expired - Fee Related CN202605826U (en) 2012-05-18 2012-05-18 Full-automatic backwashing filtering device

Country Status (1)

Country Link
CN (1) CN202605826U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104147842A (en) * 2014-07-31 2014-11-19 中国农业科学院农田灌溉研究所 Combined multifunctional filtering device
CN105126437A (en) * 2015-10-12 2015-12-09 中国农业科学院农田灌溉研究所 Multi-stage composite filtration device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104147842A (en) * 2014-07-31 2014-11-19 中国农业科学院农田灌溉研究所 Combined multifunctional filtering device
CN104147842B (en) * 2014-07-31 2015-08-26 中国农业科学院农田灌溉研究所 A kind of composite multi-functional filter
CN105126437A (en) * 2015-10-12 2015-12-09 中国农业科学院农田灌溉研究所 Multi-stage composite filtration device

Similar Documents

Publication Publication Date Title
CN201088884Y (en) Water filter capable of cleaning and discharging pollution automatically
CN102794044B (en) Multi-filter cylinder automatic backwashing filter apparatus
CN111720660B (en) Hydraulic engineering is with preventing stifled pipeline
CN103566642A (en) Filter element type automatic backwash filtering device and process
CN203030083U (en) Sewage suction type automatic self-cleaning water filter
CN201105177Y (en) Floating upward filtration type filter capable of back flushing
CN202605826U (en) Full-automatic backwashing filtering device
CN208229482U (en) A kind of running water system filter with visor function
CN105617751A (en) Square pipeline filter
CN203710771U (en) Filter element type automatic back-flushing filtering device
CN203355445U (en) Back-wash flow-guiding non-return dirt separator
CN202315489U (en) Backwashing precision water filter
CN101254371A (en) Industry water-filtering apparatus
CN213895253U (en) Filter equipment of industry recirculated cooling water
CN201006358Y (en) High-accuracy filtering device
KR100933941B1 (en) Liquified fuel filtering apparatus
CN209917419U (en) Manual filter
CN211419790U (en) Oily sewage ultrafiltration treatment environment-friendly device
CN206645837U (en) A kind of online switching recoil water treatment facilities
CN215782105U (en) Water supply pipeline scrubbing device
CN202962061U (en) Sewage-suction type full-automatic self-cleaning water filter
CN216863802U (en) Simple device for removing escherichia coli in domestic sewage
CN201848137U (en) Automatically-cleaning through secondary filter screen
CN203990071U (en) Remove the device of hair in mud
CN210078975U (en) Dustproof filter

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121219

Termination date: 20180518