CN110947228A - Anti-fouling water inlet and return method for filter - Google Patents
Anti-fouling water inlet and return method for filter Download PDFInfo
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- CN110947228A CN110947228A CN201911198270.7A CN201911198270A CN110947228A CN 110947228 A CN110947228 A CN 110947228A CN 201911198270 A CN201911198270 A CN 201911198270A CN 110947228 A CN110947228 A CN 110947228A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 328
- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000003373 anti-fouling effect Effects 0.000 title abstract description 15
- 238000009826 distribution Methods 0.000 claims abstract description 117
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000011010 flushing procedure Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims 3
- 239000004744 fabric Substances 0.000 claims 1
- 238000011001 backwashing Methods 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses an anti-fouling blocking water inlet and return method for a filter, wherein in the forward water inlet process, water flow enters a water distribution channel on the ring wall of a water distribution body through a water guide part and is divergently led out, the water flow in the water distribution body applies reverse water flow pressure to a check unit, the reverse water flow pressure enables a sheet-shaped tail part of the check unit to deform, and the check channel formed in the sheet-shaped tail part blocks the water flow from passing through the check unit along with the deformation; the water flow path is divided into two in the back flushing process, and water in the water flow path I and the water flow path II is collected in the water distribution body and then flows out through the water guide part; when water backwashing or air-water backwashing is carried out, the non-return unit is opened at different opening degrees according to pressure change generated by pollution and blockage conditions of the water distribution unit, the backwashing pressure is large, and the opening degree is large, otherwise, the opening degree is small.
Description
Technical Field
The invention relates to a method for preventing dirt blocking water inflow and return for a filter, belonging to the technical field of water treatment.
Background
Filter in the water treatment facilities, its effect is the particulate matter etc. of filtration aquatic, after a period forward water production operation process, the surface of filter material can form the contaminated layer, especially when intaking when having more suspended solid, causes the quick dirty stifled of filter more easily, makes the filter produce water pressure and reduces, and the filter effect variation needs to carry out the backwash to the filter this moment, including water backwash or aqueous vapor backwash, then carries out forward washing.
At present, go up the water-locator when carrying out the backwash and intaking, the stratum contamination on filter material surface forms huge cubic jam easily, and backwash water or backwash air water discharge resistance is big, can't discharge even, need wash forward the filter this moment and just can alleviate the jam condition of intaking forward, nevertheless the jam condition still can take place for next backwash work, and the water washing is returned to the income of so relapse, complex operation seriously influences the cleaning performance, reduces the cleaning efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the anti-fouling water inlet and return method for the filter, which reduces the influence of fouling on forward or reverse water flow, realizes continuous backwashing operation of the filter under the condition of serious fouling and blockage and improves the water filtering effect.
The technical scheme for solving the technical problems is as follows: a method for preventing pollution blockage into water returning for a filter comprises forward water inlet and back flushing;
in the forward water inlet process, water flow enters a water distribution body of a water distribution unit through a water guide part, the water flow entering the water distribution body is divergently led out from a water distribution channel on the wall of a water distribution body ring, the water flow in the water distribution body applies reverse water flow pressure to a check unit inserted into the water distribution body, the reverse water flow pressure enables a flaky tail of the check unit to deform, the flaky tail of the check unit deforms to enable a check channel formed in the flaky tail to deform along with the deformation, and the check channel deforms along with the deformation to block the water flow from passing through the check unit;
in the back flushing process:
a first water flow path: the water flow enters the non-return main body of the non-return unit through the limiting unit, the water flow entering the non-return main body is guided into the flaky tail part of the non-return unit, the water flow passing through the non-return channel in the flaky tail part enters the water distribution body of the water distribution unit, and when passing through the non-return channel, the water flow applies positive water flow pressure to the flaky tail part, and the positive water flow pressure enables the non-return channel to expand;
a second water flow path: the water flow is guided into the water distribution body through the water distribution channel on the water distribution body ring wall of the water distribution unit in a furled shape;
and the water flows of the first water flow path and the second water flow path are collected in the water distribution body and then flow out through the water guide part.
As a preferred scheme of the anti-fouling water-blocking water-returning method for the filter, the water distribution unit comprises a water guide part, a cap body, a water distribution body and a combined part, the water guide part and the water distribution body are respectively formed at the upper end and the lower end of the cap body, the water guide part is communicated with the water distribution body through the cap body, the water distribution channel is formed on the annular wall of the water distribution body, and the combined part is formed at the tail end of the water distribution body;
the non-return unit comprises a placing part and a non-return main body, and is inserted into the water distribution body and blocks the placing part outside the assembling part;
the limiting unit comprises a rotary connecting part, the limiting unit is in rotary connection with the assembling part of the water distribution unit through the rotary connecting part, and the rotary connecting part and the assembling part are positioned after being in rotary connection.
As a preferable scheme of the anti-pollution water blocking inflow and return method for the filter, one end of the non-return main body is connected with the placing part, and the other end of the non-return main body is folded towards the center to form a sheet-shaped tail part with the non-return channel.
As a preferable scheme of the anti-pollution water blocking and returning method for the filter, the placing part is annular, and a gap for accommodating the placing part is formed after the rotary connection part and the assembling part are in rotary connection.
As the preferable scheme of the anti-pollution water-blocking inlet and return method for the filter, the non-return unit is made of silica gel, and the sheet-shaped tail part is bent.
As a preferred scheme of the anti-pollution water blocking water inlet and return method for the filter, the water distribution body is in a round table shape, the water distribution channels are uniformly distributed on the ring wall of the water distribution body, and the ring wall of the water distribution body is provided with spacing rings which divide the water distribution channels into a plurality of layers.
As a preferable scheme of the anti-pollution water blocking inflow and return method for the filter, the assembling part is provided with an external thread, the screwing part is provided with an internal thread, and the external thread of the assembling part and the internal thread of the screwing part are screwed.
As a preferable scheme of the anti-pollution blocking water inlet and return method for the filter, a water hole is formed at the end part of the rotary connection part, and the water hole is communicated with the non-return unit.
As a preferable scheme of the anti-pollution water blocking water inlet and return method for the filter, the water guide part, the cap body, the water distributing body and the assembly part are cast and molded into a whole, and the tail end of the water distributing body is sunken inwards and extends outwards to form the assembly part.
As a preferred scheme of the anti-fouling water inlet and return method for the filter, a filter material is filled in the water distributor; in the water flow path II in the back flushing process, water flow guided into the water distributor is uniformly distributed on the surface of the filter material.
In the forward water inlet process, water flows enter a water distribution body of a water distribution unit through a water guide part and are divergently led out from a water distribution channel on the ring wall of the water distribution body, the water flows in the water distribution body apply reverse water flow pressure to a check unit inserted into the water distribution body, the reverse water flow pressure enables a flaky tail of the check unit to deform, the flaky tail of the check unit deforms to enable the check channel formed in the flaky tail to deform along with the deformation, and the check channel blocks the water flow from passing through the check unit along with the deformation; the water flow path is divided into two in the back flushing process, and water in the water flow path I and the water flow path II is collected in the water distribution body and then flows out through the water guide part; when water backwashing or air-water backwashing is carried out, the non-return unit is opened at different opening degrees according to pressure change generated by pollution and blockage conditions of the water distribution unit, the backwashing pressure is large, and the opening degree is large, otherwise, the opening degree is small.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic view of a process for anti-fouling water-in and water-return for a filter according to an embodiment of the present invention;
FIG. 2 is a schematic view of the anti-fouling water-intake-return decomposition structure for a filter used in the embodiment of the present invention;
FIG. 3 is a schematic view of the overall structure of the anti-fouling water inlet/return filter used in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a local anti-fouling water inlet and return structure for a filter adopted in the embodiment of the invention.
In the figure, 1, a water distribution unit; 2. a non-return unit; 3. a limiting unit; 4. a water guide part; 5. a cap body; 6. distributing water; 7. a connecting part; 8. a water distribution channel; 9. a placing part; 10. a screwing part; 11. a non-return main body; 12. a non-return channel; 13. a sheet-like tail; 14. a spacer ring; 15. a water hole.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, a method for resisting fouling, water inflow and water return of a filter is provided, which comprises forward water inflow and back flushing;
in the forward water inlet process, water flow enters the water distribution body 6 of the water distribution unit 1 through the water guide part 4, the water flow entering the water distribution body 6 is divergently led out from the water distribution channel 8 on the annular wall of the water distribution body 6, the water flow in the water distribution body 6 applies reverse water flow pressure to the non-return unit 2 inserted into the water distribution body 6, the reverse water flow pressure enables the flaky tail 13 of the non-return unit 2 to deform, the flaky tail 13 of the non-return unit 2 deforms to enable the non-return channel 12 formed in the flaky tail 13 to deform along with the deformation, and the non-return channel 12 deforms along with the deformation to block the water flow from passing through the non-return unit 2;
in the back flushing process: a first water flow path: the water flow enters a non-return main body 11 of the non-return unit 2 through the limiting unit 3, the water flow entering the non-return main body 11 is guided into a sheet-shaped tail part 13 of the non-return unit 2, the water flow passing through a non-return channel 12 in the sheet-shaped tail part 13 enters the water distribution body 6 of the water distribution unit 1, when passing through the non-return channel 12, the water flow applies positive water flow pressure to the sheet-shaped tail part 13, and the non-return channel 12 is expanded by the positive water flow pressure;
a second water flow path: water flows through the water distribution channel 8 on the annular wall of the water distribution body 6 of the water distribution unit 1 and is guided into the water distribution body 6 in a furled shape;
the water in the first water flow path and the water in the second water flow path are collected in the water distributing body 6 and then flow out through the water guide part 4.
Specifically, in the forward water inlet process, the divergent derivation means that the water flows are diffused all around in the advancing direction of the water flow by 360 degrees, and an acute angle is formed between the diffusing angle and the original advancing direction of the water flow, and the optimal 45-degree angle is adopted, so that the outward diffusion of the water flow can be ensured, and the water flow can apply larger pressure to the sheet-shaped tail part 13 of the check unit 2, so that the check channel 12 is stopped.
Specifically, referring to fig. 2, 3 and 4, the water distribution unit 1 includes a water guide portion 4, a cap body 5, a water distribution body 6 and an assembly portion 7, the water guide portion 4 and the water distribution body 6 are respectively formed at upper and lower ends of the cap body 5, the water guide portion 4 is communicated with the water distribution body 6 through the cap body 5, the water distribution channel 8 is formed on a circumferential wall of the water distribution body 6, and the assembly portion 7 is formed at a tail end of the water distribution body 6. The non-return unit 2 comprises a placing part 9 and a non-return main body 11, and the non-return unit 2 is inserted into the water distribution body 6 and blocks the placing part 9 outside the assembling part 7. The limiting unit 3 comprises a rotary connection part 10, the limiting unit 3 is in rotary connection with the assembly part 7 of the water distribution unit 1 through the rotary connection part 10, and the rotary connection part 10 is in rotary connection with the assembly part 7 to position the placing part 9.
Specifically, one end of the non-return main body 11 is connected to the resting portion 9, and the other end of the non-return main body 11 is converged toward the center to form a sheet-shaped tail portion 13 having the non-return channel 12. The cylindrical design of the check main body 11 is provided, so that a large opening is formed, the reverse water flow is conveniently introduced into the check main body 11 in the back flushing process, and then enters the check channel 12 of the sheet tail 13, the sheet tail 13 is flexible, the check channel 12 can be expanded and deformed under the action of the pressure of the internal water flow, and the flow of the reverse water flow can be changed according to the pressure. The placing part 9 is annular, and a gap for accommodating the placing part 9 is formed after the rotary connection part 10 and the assembly part 7 are connected in a rotary mode. The placing part 9 is designed in a ring sheet shape and can be fixed in a gap formed after the assembling part 7 and the rotating part 10 are rotated, and then the fixing effect on the non-return unit 2 is achieved.
In an embodiment of the anti-fouling water-returning method for the filter, the non-return unit 2 is made of silica gel, and the sheet-shaped tail part 13 is bent. The flaky tail 13 deforms under the action of pressure, so that the non-return channel 12 deforms along with the pressure. The non-return unit 2 made of silica gel has the advantages of flexibility, corrosion resistance and good sealing effect, and particles can not leak when entering the water outlet end. More importantly, the on-off of the check channel 12 and the expansion of the check channel 12 under the action of pressure are realized based on the flexibility of the sheet tail part 13, so that the control of water flow is realized.
Specifically, the curved sheet-shaped tail portion 13 is designed to be of an inverted J shape, so that an excellent effect is achieved, the check channel 12 is effectively guaranteed to be closed when forward water flows, and the check channel 12 is communicated when reverse water flows. The forward and reverse directions of the water flow are determined relative to the water inlet and outlet directions of the water distribution unit 1. The forward water inlet corresponds to the reverse stress of the flaky tail part 13, and the backward flushing corresponds to the forward stress of the flaky tail part 13, at the moment, the non-return channel 12 is opened, and the water flux is adjusted based on the pressure change.
In an embodiment of the anti-fouling water-blocking water-returning method for the filter, the water distribution body 6 is in a circular truncated cone shape, the water distribution channels 8 are uniformly distributed on the ring wall of the water distribution body 6, the ring wall of the water distribution body 6 is provided with spacing rings 14, and the spacing rings 14 divide the water distribution channels 8 into an upper layer, a middle layer and a lower layer. The circular truncated cone-shaped water distribution body 6 can enable water flow to have a component velocity along the traveling direction, and filtering efficiency is guaranteed. The design of the spacing ring 14 can play a skeleton role of the water distribution channel 8, and the impact resistance of the water distribution channel 8 is improved.
In one embodiment of the anti-fouling water inlet and return method for the filter, the assembling portion 7 is provided with an external thread, the screwing portion 10 is provided with an internal thread, the external thread of the assembling portion 7 and the internal thread of the screwing portion 10 are screwed, the connecting mode of the assembling portion 7 and the screwing portion 10 adopts threads, the disassembly is convenient, and the connection stability is high after the screwing. The end of the screwing part 10 is formed with a water hole 15, and the water hole 15 is communicated with the non-return unit 2. The water hole 15 is used for introducing water flow into the check body 11 of the check unit 2 and further into the check passage 12 when back flushing is performed.
In an embodiment of the anti-fouling water inlet and return method for the filter, the water guide part 4, the cap body 5, the water distribution body 6 and the assembly part 7 are cast and molded into a whole, the structural strength of the whole water distribution unit 1 is ensured by the integral molding, the tail end of the water distribution body 6 is sunken inwards and extends outwards to form the assembly part 7, and the assembly part 7 is used for connecting the water distribution unit 1 with the limiting unit 3.
In one embodiment of the anti-fouling water inlet and return method for the filter, the water distributing body 6 is filled with a filter material; the filter material can be selected from commercially available common materials. Based on the technical scheme, in the reverse water inlet flushing process, water flow passing through the water distribution channel 8 of the water distribution body 6 can be uniformly distributed on the surface of the filter material. In the water flow path II in the back flushing process, the water flow guided into the water distributor 6 is uniformly distributed on the surface of the filter material.
In the forward water inlet process, water flow enters a water distribution body 6 of a water distribution unit 1 through a water guide part 4 and is divergently led out from a water distribution channel 8 on the annular wall of the water distribution body 6, the water flow in the water distribution body 6 applies reverse water flow pressure to a check unit 2 inserted into the water distribution body 6, the reverse water flow pressure enables a sheet-shaped tail part 13 of the check unit 2 to deform, the sheet-shaped tail part 13 of the check unit 2 deforms to enable a check channel 12 formed in the sheet-shaped tail part 13 to deform along with the deformation, and the check channel 12 blocks the water flow from passing through the check unit 2 along with the deformation; the water flow path in the back flushing process is divided into two, and water flows in the water flow path I and the water flow path II are collected in the water distribution body 6 and then flow out through the water guide part 4; when water backwashing or air-water backwashing is carried out, the non-return unit 2 is opened at different opening degrees according to pressure change generated by pollution and blockage conditions of the water distribution unit 1, the backwashing pressure is large, and the opening degree is large, otherwise, the opening degree is small.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for preventing pollution blockage into water return for a filter is characterized by comprising the steps of forward water inlet and back flushing;
in the forward water inlet process, water flow enters a water distribution body (6) of a water distribution unit (1) through a water guide part (4), the water flow entering the water distribution body (6) is divergently led out from a water distribution channel (8) on the annular wall of the water distribution body (6), the water flow inside the water distribution body (6) applies reverse water flow pressure to a check unit (2) inserted into the water distribution body (6), the reverse water flow pressure enables a sheet-shaped tail part (13) of the check unit (2) to deform, the sheet-shaped tail part (13) of the check unit (2) deforms to enable a check channel (12) formed in the sheet-shaped tail part (13) to deform along with the deformation, and the check channel (12) blocks the water flow from passing through the check unit (2) along with the deformation;
in the back flushing process:
a first water flow path: the water flow enters a non-return main body (11) of the non-return unit (2) through a limiting unit (3), the water flow entering the non-return main body (11) is guided into a sheet tail part (13) of the non-return unit (2), the water flow passing through a non-return channel (12) in the sheet tail part (13) enters a water distribution body (6) of the water distribution unit (1), and when passing through the non-return channel (12), the water flow exerts forward water flow pressure on the sheet tail part (13), and the non-return channel (12) is expanded by the forward water flow pressure;
a second water flow path: water flows through a water distribution channel (8) on the annular wall of a water distribution body (6) of the water distribution unit (1) and is guided into the water distribution body (6) in a furled shape;
the water in the first water flow path and the water in the second water flow path are collected in the water distribution body (6) and then flow out through the water guide part (4).
2. A soil resistant water back flow method for a filter as claimed in claim 1, wherein: the water distribution unit (1) comprises a water guide part (4), a cap body (5), a water distribution body (6) and a combined part (7), the water guide part (4) and the water distribution body (6) are respectively formed at the upper end and the lower end of the cap body (5), the water guide part (4) is communicated with the water distribution body (6) through the cap body (5), the water distribution channel (8) is formed on the annular wall of the water distribution body (6), and the combined part (7) is formed at the tail end of the water distribution body (6);
the non-return unit (2) comprises a placing part (9) and a non-return main body (11), and the non-return unit (2) is inserted into the water distribution body (6) and blocks the placing part (9) outside the assembling part (7);
the limiting unit (3) comprises a rotary connection part (10), the limiting unit (3) is connected with an assembly part (7) of the water distribution unit (1) in a rotary mode through the rotary connection part (10), and the rotary connection part (10) is positioned on the placing part (9) after being connected with the assembly part (7) in a rotary mode.
3. A method as claimed in claim 2, for a filter resistant to fouling of water returning thereto, wherein: one end of the non-return main body (11) is connected with the placing part (9), and the other end of the non-return main body (11) is folded towards the center to form a sheet-shaped tail part (13) with the non-return channel (12).
4. A method as claimed in claim 2, for a filter resistant to fouling of water returning thereto, wherein: the placing part (9) is annular, and a gap for accommodating the placing part (9) is formed after the screwing part (10) and the assembling part (7) are screwed.
5. A soil resistant water back flow method for a filter as claimed in claim 1, wherein: the non-return unit (2) is made of silica gel, and the sheet tail part (13) is bent.
6. A method as claimed in claim 2, for a filter resistant to fouling of water returning thereto, wherein: the water distribution body (6) is in a round table shape, the water distribution channels (8) are uniformly distributed on the ring wall of the water distribution body (6), the ring wall of the water distribution body (6) is provided with spacing rings (14), and the spacing rings (14) divide the water distribution channels (8) into a plurality of layers.
7. A method as claimed in claim 2, for a filter resistant to fouling of water returning thereto, wherein: the assembly part (7) is provided with an external thread, the screwing part (10) is provided with an internal thread, and the external thread of the assembly part (7) is screwed with the internal thread of the screwing part (10).
8. A method as claimed in claim 2, for a filter resistant to fouling of water returning thereto, wherein: the tip of portion of revolving joint (10) is formed with water hole (15), water hole (15) intercommunication contrary unit (2) of ending.
9. A method as claimed in claim 2, for a filter resistant to fouling of water returning thereto, wherein: the water guide part (4), the cap body (5), the water distributing body (6) and the assembly part (7) are cast into a whole, and the tail end of the water distributing body (6) is sunken inwards and extends outwards to form the assembly part (7).
10. A soil resistant water back flow method for a filter as claimed in claim 1, wherein: the cloth water body (6) is filled with filter materials; in the water flow path II in the back flushing process, the water flow guided into the water distribution body (6) is uniformly distributed on the surface of the filter material.
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| CN201911198270.7A CN110947228B (en) | 2019-11-29 | 2019-11-29 | Anti-fouling water inlet and return method for filter |
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| CN201911198270.7A CN110947228B (en) | 2019-11-29 | 2019-11-29 | Anti-fouling water inlet and return method for filter |
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