CN104906850A - Bidirectional strong spray washing prefilter - Google Patents

Bidirectional strong spray washing prefilter Download PDF

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Publication number
CN104906850A
CN104906850A CN201510243765.2A CN201510243765A CN104906850A CN 104906850 A CN104906850 A CN 104906850A CN 201510243765 A CN201510243765 A CN 201510243765A CN 104906850 A CN104906850 A CN 104906850A
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China
Prior art keywords
water
peening
hydro
powerful
flushing
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Granted
Application number
CN201510243765.2A
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Chinese (zh)
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CN104906850B (en
Inventor
徐秋伟
刘鑫
刘拯
陈大凯
徐勇
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.)
Shenzhen Lang Gehuan Difficult To Understand Protects Co Ltd
Shenzhen Airgle Corp Ltd
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Shenzhen Lang Gehuan Difficult To Understand Protects Co Ltd
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Priority to CN201510243765.2A priority Critical patent/CN104906850B/en
Publication of CN104906850A publication Critical patent/CN104906850A/en
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Publication of CN104906850B publication Critical patent/CN104906850B/en
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  • Filtration Of Liquid (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

The invention provides a bidirectional strong spray washing prefilter. A source water inlet (11) and a filtered water outlet (12) are arranged at two sides of an upper shell body (2) respectively. A water outlet (13) is arranged at the lower part of a lower shell body (3). A water path reversing valve (16) and a flushing control handle (15) are arranged inside the upper shell body (2). A filter screen (14) and a strong force water spraying device (19) are arranged inside a main shell body (1). A draining ball valve (18) and a flushing draining handle (17) are arranged inside the lower shell body (3). The flushing control handle (15) controls switching of the water path reversing valve (16) in a filtration position, a spraying position and a backwashing position. The flushing draining handle (17) controls opening and closing of the draining ball valve (18). Through the flushing control handle (15), the water path reversing valve (16) is adjusted to the spraying position and the backwashing position. Through the flushing draining handle (17), the draining ball valve (18) is opened. Rapid switching of forward and reverse water flows is achieved and bidirectional strong spray washing of the filter screen (14) is carried out.

Description

Two-way powerful hydro-peening fore filter
Technical field
The present invention relates to water-treatment technology field, particularly relate to a kind of two-way powerful hydro-peening fore filter.
Background technology
The control that the water supply in city causes the water degradation of domestic water and water equipment due to secondary pollutions such as ducted iron rust, silts is malfunctioning; and make other relate to reduce with the Domestic electrical equipment life of water; even produce huge potential safety hazard; therefore; from large environment, every household all needs to install fore filter to improve water quality and protection domestic water equipment.
The fore filter of existing market mainly comprises along types such as wash type, backwash type, siphon types.But there is different problem problems in dissimilar fore filter:
Various types of fore filter does not rinse prompting mostly, or it is inaccurate to rinse prompting, and the water side water yield has reduced to user and cannot use and also do not point out, or frequent prompting filter core rinses;
Very weak along the backwash rate rinsing fore filter, filter core is easily blocked, and not only less impurity rinses not out, on the contrary in filter core embedding more deeply, tighter, easily become secondary pollution, consumer needs to open housing and filter core is brought out scrubs with toothbrush, takes time and effort.
Siphonic fore filter product structure is complicated, it is thorough to rinse, if water-quality ratio is poor, impurity in filter core embedding more deeply, tighter, finally cause filter core to block, cause secondary pollution, get up very difficult once filter core blocks maintenance.On the other hand, most siphonic fore filter product sacrifices filtering accuracy to reach developing result, and usual filtering accuracy is all more than 50 microns.
The fore filter that backwash type fore filter compares other has had some to improve technically, but run into the trapped substance be blocked in opening of sieve, need to open filter flask and take out filter screen, with the cleaning of the auxiliary instrument such as hairbrush (available toothbrush replacement), air gun, also make troubles to user.
In addition, the preprocessor that general water purifier is commonly used at present all adopts PP (polypropylene fibre) cotton, and it is between 1-50 micron that its filtering accuracy is known as.The major defect of PP cotton needs frequent replacing and filter core not to realize backwash, can not discharge in time, cause secondary pollution, easy breed bacteria after impurities accumulation.In order to estimate filter element using state, the cotton filter flask of most of PP all adopts transparent material, but can easy tongue green for a long time.
In view of above-mentioned various types of fore filter Problems existing, be necessary to improve fore filter.
Summary of the invention
The object of the present invention is to provide a kind of two-way powerful hydro-peening fore filter, it can carry out two-way strong flushing to filter screen, so that filter screen is rinsed well, and can the blocked state of automatic monitoring filter screen, prompting user cleans filter screen in time.
For achieving the above object, the invention provides a kind of two-way powerful hydro-peening fore filter, the lower house comprising main casing, be connected to the upper shell above described main casing and be connected to below described main casing; The both sides of described upper shell are respectively equipped with source water water inlet and filtered water delivery port, are provided with discharge outlet below described lower house;
The flushing joystick that described upper shell inside is provided with water route reversal valve and is connected with described water route reversal valve; Described main casing inside is provided with filter screen and is located at the powerful water injector of described its interior; The flush discharge handle that described lower house inside is provided with drainage ball valve and is connected with described drainage ball valve; Described flushing joystick controls described water route reversal valve and switches between strain position, hydro-peening position and backwash position; Described flush discharge handle controls the open and close of described drainage ball valve;
Regulate water route reversal valve to hydro-peening position and backwash position respectively by flushing joystick, and by flush discharge handle opening water discharge ball valve, realize the quick switching of positive and negative current, two-way powerful hydro-peening is carried out to filter screen.
The side of described main casing is provided with horizontal part and is connected to the vertical portion above described horizontal part, and described horizontal part inside is provided with supervising device, and inside, described vertical portion is provided with indicating device.
Described supervising device comprises horizontally disposed pressure drop piston, the first magnet be located on described pressure drop piston, be located at described pressure drop piston away from main casing one end piston holder, be located at the first spring between described pressure drop piston and piston holder and be located at the sealing nut being fixed on described horizontal part end outside described piston holder; One end of described pressure drop piston is connected to described source water inlet end, and the other end is connected to described filtered water water outlet end, and described pressure drop piston can move back and forth in described horizontal part.
The second spring that described indicating device comprises showing rod, be located at the second magnet bottom described showing rod, be located at the transparent indication window above described showing rod and be located between described showing rod and transparent indication window, described showing rod can move back and forth in described vertical portion.
Described first magnet is identical with the magnetic pole of the second magnet opposing end surface.
Described powerful water injector can spray described filter screen and clean within the scope of 0 to 360 degree.
Described powerful water injector is fixed structure or turntable.
Spherical in shape or the taper of described powerful water injector.
Described lower house outside is provided with the flushing date wheel that can rotate relative to described lower house, and described flushing date wheel outer peripheral face is provided with the numeral for record date.
Described source water water inlet is equipped with joint with filtered water delivery port and is connected the collar nut of described joint and upper shell.
Beneficial effect of the present invention: a kind of two-way powerful hydro-peening fore filter provided by the invention, water route reversal valve is set between source water water inlet and filtered water delivery port and rinses joystick, powerful water injector is set at its interior, drainage ball valve and flush discharge handle are set at discharge outlet place; Flushing joystick can control described water route reversal valve and switch between strain position, hydro-peening position and backwash position; Flush discharge handle can control the open and close of described drainage ball valve; Regulate water route reversal valve to hydro-peening position and backwash position respectively by flushing joystick, and by flush discharge handle opening water discharge ball valve, realize the quick switching of positive and negative current, two-way powerful hydro-peening is carried out to filter screen, cleaning performance is good, and time saving and energy savingly economizes on water again.In addition, two-way powerful hydro-peening fore filter inside of the present invention is provided with supervising device and indicating device, one end of the pressure drop piston of supervising device is connected to source water inlet end, the other end is connected to filtered water water outlet end, the blocked state of filter screen is transmitted by pressure drop piston, and moving to transparent indication window by the showing rod that identical the first magnet of polarity and the second magnet promote indicating device, prompting user cleans filter screen; Also be provided with flushing date wheel simultaneously, rinse date wheel by adjustment after flushing filtering net and record washing time, facilitate customization flushing plan next time, time saving and energy saving, economic environmental protection.
In order to further understand feature of the present invention and technology contents, refer to following detailed description for the present invention and accompanying drawing, but accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention describe in detail, will make technical scheme of the present invention and other beneficial effect apparent.
In accompanying drawing,
Fig. 1 is the schematic front view of two-way powerful hydro-peening fore filter of the present invention;
Fig. 2 is that schematic diagram is looked on a left side for two-way powerful hydro-peening fore filter of the present invention;
Fig. 3 is the cross-sectional view corresponding to A-A place in Fig. 2;
Fig. 4 is that schematic diagram is looked on the right side of two-way powerful hydro-peening fore filter of the present invention;
Fig. 5 is the cross-sectional view corresponding to B-B place in Fig. 1;
Fig. 6 is the close-up schematic view corresponding to C place in Fig. 5.
Detailed description of the invention
For further setting forth the technological means and effect thereof that the present invention takes, be described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
Please refer to Fig. 1 to Fig. 6, the invention provides a kind of two-way powerful hydro-peening fore filter, the lower house 3 comprising main casing 1, be connected to the upper shell 2 above described main casing 1 and be connected to below described main casing 1.The both sides of described upper shell 2 are respectively equipped with source water water inlet 11 and filtered water delivery port 12, are provided with discharge outlet 13 below described lower house 3.
The flushing joystick 15 that described upper shell 2 inside is provided with water route reversal valve 16 and is connected with described water route reversal valve 16; Described main casing 1 inside is provided with filter screen 14 and is located at the powerful water injector 19 of described filter screen 14 inside; The flush discharge handle 17 that described lower house 3 inside is provided with drainage ball valve 18 and is connected with described drainage ball valve 18; Described flushing joystick 15 controls described water route reversal valve 16 and switches between strain position, hydro-peening position and backwash position; Described flush discharge handle 17 controls the open and close of described drainage ball valve 18.
Regulate reversal valve 16 to hydro-peening position, water route and backwash position respectively by flushing joystick 15, and by flush discharge handle 17 opening water discharge ball valve 18, realize the quick switching of positive and negative current, two-way powerful hydro-peening is carried out to filter screen 14.
Particularly, the filter screen 14 of different accuracy can be set as required, and the size of the diameter of the spool of described water route reversal valve 16 can be set as required, to provide different flows.
Further, refer to Fig. 5, Fig. 6, the side of described main casing 1 is provided with horizontal part 50 and is connected to the vertical portion 60 above described horizontal part 50, described horizontal part 50 inside is provided with supervising device 5, inside, described vertical portion 60 is provided with indicating device 6, described supervising device 5 is for monitoring the blocked state of filter screen 14, and described indicating device 6 can point out user to clean filter screen 14 in time.
Particularly, described supervising device 5 comprise horizontally disposed pressure drop piston 51, the first magnet 52 be located on described pressure drop piston 51, be located at described pressure drop piston 51 away from main casing 1 one end piston holder 54, be located at the first spring 53 between described pressure drop piston 51 and piston holder 54 and be located at the sealing nut 55 being fixed on described horizontal part 50 end outside described piston holder 54; One end of described pressure drop piston 51 is connected to described source water water inlet 11 end, and the other end is connected to described filtered water delivery port 12 end, and described pressure drop piston 51 can move back and forth in described horizontal part 50.
Described indicating device 6 comprises showing rod 61, be located at the second magnet 62 bottom described showing rod 61, be located at the transparent indication window 64 above described showing rod 61 and be located at the second spring 63 between described showing rod 61 and transparent indication window 64, and described showing rod 61 can move back and forth in described vertical portion 60.
Described first magnet 52 is identical with the magnetic pole of the second magnet 62 opposing end surface.Described filter interior adopts sealing ring 4 to seal.
Particularly, described powerful water injector 19 can spray described filter screen 14 and clean within the scope of 0 to 360 degree.Described powerful water injector 19 can be set to the structure of fixing, and also can be set to rotating structure.Described powerful water injector 19 can arrange spherical in shape, taper or other shape.
Particularly, described lower house 3 outside is provided with the flushing date wheel 23 that can rotate relative to described lower house 3, described flushing date wheel 23 outer peripheral face is provided with the numeral for record date, after flushing completes, washing time can be recorded by spin rinse date wheel 23, make user customize the flushing plan of oneself more easily.
Particularly, described source water water inlet 11 is equipped with joint 24 with filtered water delivery port 12 and is connected the collar nut 25 of described joint 24 and upper shell 2.
The operation principle of two-way powerful hydro-peening fore filter of the present invention is as follows:
When using two-way powerful hydro-peening fore filter of the present invention to filter, described source water water inlet 11 connects source water end (W.E.), and described filtered water delivery port 12 connects user side.Enter the source water of filter under the driving of running water pressure by described source water water inlet 11, commutated by described water route reversal valve 16.Regulate described water route reversal valve 16 to strain position by rinsing joystick 15, the source water of making directly flows through described filter screen 14 and filters, and then flows out from filtered water delivery port 12, and the impurity such as the silt in the water of source, iron rust, drift are trapped within filter screen 14.
Along with the accumulation of time, the impurity that filter screen 14 retains gets more and more, and the flow that can result through the filtered water of filter screen 14 reduces, and reduces at the pressure of the filtered water of filtered water delivery port 12.One end due to described pressure drop piston 51 is connected to source water water inlet 11 end, the other end is connected to filtered water delivery port 12 end, therefore along with filter screen 14 block serious, Pressure Drop strengthens, and can promote pressure drop piston 51 and drive the first magnet 52 to move towards the low one end of pressure and drainage delivery port 12 end.When the first magnet 52 moves to the below of showing rod 61, because the first magnet 52 is identical with the magnetic pole of the opposing end surface of the second magnet 62 bottom showing rod 61, based on the principle of two like magnetic poles repel each other, second magnet 62 is pushed upwardly under the effect of opposing magnetic force with showing rod 61, move to transparent indication window 64, through transparent indication window 64, user just can learn that filter screen 14 has blocked to a certain extent, need to rinse.
When the filter screen 14 of two-way powerful hydro-peening fore filter of the present invention is rinsed, user can select first to regulate reversal valve 16 to hydro-peening position, water route by rinsing joystick 15, and regulate drainage ball valve 18 to enable possition by flush discharge handle 17, at this moment the flow of source water is less than the flow of discharge outlet 13 water outlet greatly, water in the middle of filter screen 14 is emptying very soon, and under the driving of source water pressure, strong water column is ejected on filter screen 14 by described powerful water injector 19, the impurity of interception on filter screen 14 is broken up and peeled off, discharged by discharge outlet 13.Then regulate reversal valve 16 to backwash position, water route by rinsing joystick 15, realize the reverse of current, make source water from the water purification effluent of filter screen 14 to Yuan Shui side, the pressure now formed on filter screen 14, thoroughly washes away the impurity be embedded in filter screen 14 mesh.Form powerful flushing strength eventually through positive and negative quick switching, two-way powerful hydro-peening is carried out to filter screen 14, thus at short notice filter screen 14 is thoroughly cleaned up.
Certainly, user also can select first to regulate reversal valve 16 to backwash position, water route by rinsing joystick 15, and carry out backwash blowdown by flush discharge handle 17 opening water discharge ball valve 18, and then regulate reversal valve 16 to hydro-peening position, water route by rinsing joystick 15, utilize described powerful water injector 19 to realize high-pressure spray wash, finally also can reach same cleaning performance to filter screen 14.
After filter screen 14 is cleaned up, the pressure of source water water inlet 11 end and filtered water delivery port 12 end is balanced, pressure drop piston 51 and the first magnet 52 are pushed back to original position by the first spring 53 in pressure drop piston 51, and the second magnet 62 losing magnetically-actuated is also pushed back to original position by the second spring 63 with showing rod 61.Now user is by spin rinse date wheel 23, regulates the numeral of rinsing date wheel 23 outer peripheral face, and record washing time, to facilitate customization flushing plan next time.
Two-way powerful hydro-peening fore filter of the present invention can silt, iron rust, large particulate matter effectively in Filtered tap water, prevent a large amount of precipitated impurities produced in city and community water supply network from damaging human body, and to concealed pipe, tap, hot-water heating, water heater, boiler, central air-conditioning, washing machine, dish-washing machine, coffee machine and other with appliance water as water purifier, water purification machine, water softening device etc. play positive pre-protective effect; Owing to can carry out two-way strong flushing to filter screen, cleaning performance is good; Automatically can also detect the blocked state of filter screen, prompting user cleans filter screen in time.
In sum, two-way powerful hydro-peening fore filter of the present invention, water route reversal valve is set between source water water inlet and filtered water delivery port and rinses joystick, powerful water injector is set at its interior, drainage ball valve and flush discharge handle are set at discharge outlet place; Flushing joystick can control described water route reversal valve and switch between strain position, hydro-peening position and backwash position; Flush discharge handle can control the open and close of described drainage ball valve; Regulate water route reversal valve to hydro-peening position and backwash position respectively by flushing joystick, and by flush discharge handle opening water discharge ball valve, realize the quick switching of positive and negative current, two-way powerful hydro-peening is carried out to filter screen, cleaning performance is good, and time saving and energy savingly economizes on water again.In addition, two-way powerful hydro-peening fore filter inside of the present invention is provided with supervising device and indicating device, one end of the pressure drop piston of supervising device is connected to source water inlet end, the other end is connected to filtered water water outlet end, the blocked state of filter screen is transmitted by pressure drop piston, and moving to transparent indication window by the showing rod that identical the first magnet of polarity and the second magnet promote indicating device, prompting user cleans filter screen; Also be provided with flushing date wheel simultaneously, rinse date wheel by adjustment after flushing filtering net and record washing time, facilitate customization flushing plan next time, time saving and energy saving, economic environmental protection.
The above, for the person of ordinary skill of the art, can make other various corresponding change and distortion according to technical scheme of the present invention and technical conceive, and all these change and be out of shape the protection domain that all should belong to the claims in the present invention.

Claims (10)

1. a two-way powerful hydro-peening fore filter, it is characterized in that, comprise main casing (1), be connected to the upper shell (2) of described main casing (1) top and be connected to the lower house (3) of described main casing (1) below; The both sides of described upper shell (2) are respectively equipped with source water water inlet (11) and filtered water delivery port (12), and described lower house (3) below is provided with discharge outlet (13);
The flushing joystick (15) that described upper shell (2) inside is provided with water route reversal valve (16) and is connected with described water route reversal valve (16); Described main casing (1) inside is provided with filter screen (14) and is located at the inner powerful water injector (19) of described filter screen (14); The flush discharge handle (17) that described lower house (3) inside is provided with drainage ball valve (18) and is connected with described drainage ball valve (18); Described flushing joystick (15) controls described water route reversal valve (16) and switches between strain position, hydro-peening position and backwash position; Described flush discharge handle (17) controls the open and close of described drainage ball valve (18);
Regulate water route reversal valve (16) to hydro-peening position and backwash position respectively by flushing joystick (15), and by flush discharge handle (17) opening water discharge ball valve (18), realize the quick switching of positive and negative current, two-way powerful hydro-peening is carried out to filter screen (14).
2. two-way powerful hydro-peening fore filter as claimed in claim 1, it is characterized in that, the side of described main casing (1) is provided with horizontal part (50) and is connected to the vertical portion (60) of described horizontal part (50) top, described horizontal part (50) inside is provided with supervising device (5), and described vertical portion (60) inside is provided with indicating device (6).
3. two-way powerful hydro-peening fore filter as claimed in claim 2, it is characterized in that, described supervising device (5) comprises horizontally disposed pressure drop piston (51), be located at the first magnet (52) on described pressure drop piston (51), be located at the piston holder (54) of described pressure drop piston (51) away from main casing (1) one end, be located at the first spring (53) between described pressure drop piston (51) and piston holder (54), and be located at the sealing nut (55) that described horizontal part (50) end is fixed in described piston holder (54) outside, one end of described pressure drop piston (51) is connected to described source water water inlet (11) end, the other end is connected to described filtered water delivery port (12) end, and described pressure drop piston (51) can move back and forth in described horizontal part (50).
4. two-way powerful hydro-peening fore filter as claimed in claim 3, it is characterized in that, described indicating device (6) comprises showing rod (61), be located at second magnet (62) of described showing rod (61) bottom, the transparent indication window (64) of being located at described showing rod (61) top and the second spring (63) be located between described showing rod (61) and transparent indication window (64), and described showing rod (61) can move back and forth in described vertical portion (60).
5. two-way powerful hydro-peening fore filter as claimed in claim 4, is characterized in that, described first magnet (52) is identical with the magnetic pole of the second magnet (62) opposing end surface.
6. two-way powerful hydro-peening fore filter as claimed in claim 1, is characterized in that, described powerful water injector (19) can be sprayed described filter screen (14) and clean within the scope of 0 to 360 degree.
7. two-way powerful hydro-peening fore filter as claimed in claim 6, is characterized in that, described powerful water injector (19) is fixed structure or turntable.
8. two-way powerful hydro-peening fore filter as claimed in claim 6, is characterized in that, the spherical in shape or taper of described powerful water injector (19).
9. two-way powerful hydro-peening fore filter as claimed in claim 1, it is characterized in that, described lower house (3) outside is provided with the flushing date wheel (23) that can rotate relative to described lower house (3), and described flushing date wheel (23) outer peripheral face is provided with the numeral for record date.
10. two-way powerful hydro-peening fore filter as claimed in claim 1, it is characterized in that, described source water water inlet (11) and filtered water delivery port (12) are equipped with joint (24) and are connected the collar nut (25) of described joint (24) and upper shell (2).
CN201510243765.2A 2015-05-13 2015-05-13 Two-way strength hydro-peening fore filter Active CN104906850B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN104906850B CN104906850B (en) 2016-09-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106422461A (en) * 2016-12-07 2017-02-22 南京菲时特实业有限公司 Reverse washing prefilter
CN108553976A (en) * 2018-01-31 2018-09-21 陕西城鸿实业有限公司 A kind of Multifunctional filter element
CN109140039A (en) * 2018-09-28 2019-01-04 吴志泉 Water-cycling-media filtration system
CN110613972A (en) * 2019-09-10 2019-12-27 江苏鸿碧科技发展有限公司 Back-washing pre-filter

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DE4307723A1 (en) * 1992-03-12 1993-09-16 Erwin Schmidt Pressure back-flushing in-line filter for removing solids from liquids - with differential pressure monitoring of fouling
US5906751A (en) * 1997-10-10 1999-05-25 Parker; Leland L. Filtering apparatus with improved quick-opening backwash valve
CN2836893Y (en) * 2005-10-20 2006-11-15 严志林 Fine filter capable of washing forwardly and backwardly
CN201271534Y (en) * 2008-09-01 2009-07-15 李哲远 Frontend preprocessor
CN201746361U (en) * 2010-01-29 2011-02-16 王建民 Filtration water puffier and ultrafiltration-membrane filter core
CN203139751U (en) * 2013-03-19 2013-08-21 石河子天露节水设备有限责任公司 Self-priming backwashing net-type filter
CN204051116U (en) * 2014-07-08 2014-12-31 浙江华强环境科技有限公司 A kind of flushing mechanism of middle water manganese sand filter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4307723A1 (en) * 1992-03-12 1993-09-16 Erwin Schmidt Pressure back-flushing in-line filter for removing solids from liquids - with differential pressure monitoring of fouling
US5906751A (en) * 1997-10-10 1999-05-25 Parker; Leland L. Filtering apparatus with improved quick-opening backwash valve
CN2836893Y (en) * 2005-10-20 2006-11-15 严志林 Fine filter capable of washing forwardly and backwardly
CN201271534Y (en) * 2008-09-01 2009-07-15 李哲远 Frontend preprocessor
CN201746361U (en) * 2010-01-29 2011-02-16 王建民 Filtration water puffier and ultrafiltration-membrane filter core
CN203139751U (en) * 2013-03-19 2013-08-21 石河子天露节水设备有限责任公司 Self-priming backwashing net-type filter
CN204051116U (en) * 2014-07-08 2014-12-31 浙江华强环境科技有限公司 A kind of flushing mechanism of middle water manganese sand filter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106422461A (en) * 2016-12-07 2017-02-22 南京菲时特实业有限公司 Reverse washing prefilter
CN106422461B (en) * 2016-12-07 2018-06-15 南京菲时特实业有限公司 A kind of reverse direction rinses fore filter
CN108553976A (en) * 2018-01-31 2018-09-21 陕西城鸿实业有限公司 A kind of Multifunctional filter element
CN108553976B (en) * 2018-01-31 2020-09-29 陕西城鸿实业有限公司 Multifunctional filter element
CN109140039A (en) * 2018-09-28 2019-01-04 吴志泉 Water-cycling-media filtration system
CN110613972A (en) * 2019-09-10 2019-12-27 江苏鸿碧科技发展有限公司 Back-washing pre-filter

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