CN214513057U - Automatic back flush prefilter - Google Patents
Automatic back flush prefilter Download PDFInfo
- Publication number
- CN214513057U CN214513057U CN202120108275.2U CN202120108275U CN214513057U CN 214513057 U CN214513057 U CN 214513057U CN 202120108275 U CN202120108275 U CN 202120108275U CN 214513057 U CN214513057 U CN 214513057U
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- China
- Prior art keywords
- shell
- porous filter
- cover plate
- filter cylinder
- water inlet
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- 238000011045 prefiltration Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000010865 sewage Substances 0.000 claims abstract description 14
- 235000020188 drinking water Nutrition 0.000 claims abstract description 10
- 239000003651 drinking water Substances 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 9
- 238000011001 backwashing Methods 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 241000143060 Americamysis bahia Species 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
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- Filtration Of Liquid (AREA)
Abstract
The utility model discloses an automatic back flush prefilter. A porous filter cylinder is arranged in the shell, the upper end of the porous filter cylinder is pressed by a stop block arranged on the upper cover plate, the lower end of the porous filter cylinder is provided with an outer flange, and the outer flange is placed on an annular bracket on the inner wall of the shell; the left side of the shell is provided with a water inlet, the water inlet valve is connected with the water inlet, the center of the upper cover plate is provided with a water outlet, the center of the lower cover plate is provided with a sewage draining outlet, and the sewage draining outlet is connected with a sewage draining valve. The filtering holes on the filtering cylinder are arranged to be small conical holes, which is beneficial to the falling and outward discharge of sundries during back washing. The utility model discloses a differential pressure gauge automatic monitoring is intake the pressure differential of side and play water side, when monitoring pressure differential and reaching the default, and the automatic start back flush need not manual operation, is applicable to the prefiltering link of rural drinking water engineering.
Description
Technical Field
The utility model relates to a filter especially relates to an automatic back flush prefilter who is applicable to rural drinking water prefiltration processing.
Background
The drinking water source in rural areas generally takes mountain pond water, lake water, mountain spring water, reservoir water, well water and the like as main materials, the water sources often contain a plurality of large sundries including branches, leaves, small fishes, shrimps and other suspended matters, and the sundries are carried into a drinking water treatment system along with water flow and can affect the normal operation of treatment equipment to a certain extent, so that the treatment equipment needs to be firstly pre-filtered and intercepted before flocculation, sedimentation, filtration and other treatment units. At present, filter screens are adopted for filtration, but in the long-term use process, sundries are accumulated on the filter screens continuously, filter holes are blocked, the filtration efficiency is reduced, the filter is required to be opened for filter screen replacement or manual cleaning, and when sundries are more, for example, fallen leaves in autumn are increased, the filter screens are replaced or the cleaning frequency is increased. This approach is not only inefficient, but also increases labor costs. At present, some filtering devices for automatically cleaning dirt are adopted, but impurities have strong adhesive force in a filter screen, so that the action of mechanical external force is often needed to improve the removal efficiency of the impurities during backwashing, and the operation is complicated.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem existing in the background technology, the utility model aims to provide an automatic back flush prefilter to solve the problem that the filter screen blocks up easily, the manual work is changed and wash loaded down with trivial details, make the filter realize automatic back flush, in order to be used for the prefilter link of rural drinking water engineering.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model mainly comprises an upper cover plate, a shell and a lower cover plate; the upper end and the lower end of the shell are respectively connected and installed with an upper cover plate and a lower cover plate, a porous filter cylinder is arranged in the shell, the lower end of the porous filter cylinder is provided with an outer flange, the outer flange is placed on an annular support fixed on the inner wall of the shell, the upper end of the porous filter cylinder is pressed by a stop block arranged on the bottom surface of the upper cover plate in a protruding mode, the bottom of the shell is provided with a water inlet, the water inlet is located below the porous filter cylinder, and the water inlet is connected with a drinking water source water intake pipeline through a water inlet valve; the center of the upper cover plate is provided with a water outlet, the center of the lower cover plate is provided with a sewage draining outlet, and the sewage draining outlet is connected with a sundries collecting device through a sewage draining valve; the shell is externally provided with a differential pressure gauge which is respectively communicated with the inside of the top and the inside of the bottom of the shell.
The differential pressure meter is respectively communicated with the top of the shell above the porous filter cylinder and the bottom below the porous filter cylinder.
The lower side of the porous filter cylinder is provided with an opening, the upper surface and the peripheral side surface of the porous filter cylinder are provided with conical filter holes with uniform sizes, and the inner pore diameter of each conical filter hole is larger than the outer pore diameter.
And spacing spaces are reserved between the upper surface of the porous filter cylinder and the lower side of the upper cover plate and between the side surface of the porous filter cylinder and the inner wall of the shell.
The lower end of the porous filter cylinder is provided with an outer flange, the outer diameter of the outer flange is smaller than the inner diameter of the shell, and a gap is reserved between the outer flange and the shell.
The annular support is welded and fixed on the inner wall of the shell close to the bottom.
The utility model has the advantages that:
the filter holes on the filter cylinder are arranged to be small conical holes, the aperture of the water inlet side is larger, the aperture of the water outlet side is smaller, and therefore sundries can fall off and are discharged outwards during backwashing;
the shell of the prefilter is provided with a differential pressure gauge which is used for monitoring the pressure difference between the water inlet side and the water outlet side, and when the pressure difference reaches a preset value, the backwashing is automatically started without manual operation.
The utility model is suitable for a prefiltration link of rural drinking water engineering.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of the porous filter cartridge.
In the figure: 1. the device comprises a water outlet, 2, an upper cover plate, 3, a stop block, 4, a porous filter cylinder, 5, a differential pressure gauge, 6, a shell, 7, an annular bracket, 8, a water inlet valve, 9, a water inlet, 10, a lower cover plate, 11, a sewage discharge outlet, 12, a sewage discharge valve, 13, a conical filter hole, 14 and an outer flange.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the device mainly comprises an upper cover plate 2, a shell 6 and a lower cover plate 10; the upper end and the lower end of the shell 6 are respectively connected with the upper cover plate 2 and the lower cover plate 10, the porous filter cylinder 4 is arranged in the shell 6, and the lower end of the shell 6 is arranged in a conical manner, so that the collection and the discharge of pollutants are facilitated. As shown in fig. 2, the lower end of the porous filter cartridge 4 is provided with an outer flange 14, the outer flange 14 is placed on an annular support 7 fixed on the inner wall of the shell 6, the upper end of the porous filter cartridge 4 is pressed by a stop block 3 arranged on the bottom surface of the upper cover plate 2, a water inlet 9 is arranged at the bottom of the shell 6, the water inlet 9 is positioned below the porous filter cartridge 4, and the water inlet 9 is connected with a drinking water source intake pipe through a water inlet valve 8; the center of the upper cover plate 2 is provided with a water outlet 1, the center of the lower cover plate 10 is provided with a sewage outlet 11, and the sewage outlet 11 is connected with a sundries collecting device through a sewage valve 12; a differential pressure meter 5 is arranged outside the shell 6, and the differential pressure meter 5 is respectively communicated with the inside of the top and the inside of the bottom of the shell 6.
As shown in fig. 1, the differential pressure gauge 5 communicates into the top of the housing 6 above the porous filter cartridge 4 and into the bottom below the porous filter cartridge 4, respectively. So that one end of the two ends of the differential pressure gauge 5 is connected with the water inlet side, and the other end is connected with the water outlet side. The water inlet valve 8, the blow-down valve 12 and the differential pressure meter 5 are all connected to the outside, and the opening degree of the water inlet valve 8 and the blow-down valve 12 is further controlled through an external control system according to the differential pressure value of the differential pressure meter 5.
As shown in fig. 2, the lower side of the porous filter cartridge 4 is open, the upper end is closed, the upper surface and the peripheral side surface of the porous filter cartridge 4 are both provided with conical filter holes 13 with uniform size, the inner pore diameter of the conical filter holes 13 is larger than the outer pore diameter, in the specific implementation, the pore diameter of the water inlet side is 5-10mm, and the pore diameter of the water outlet side is 2-5 mm. The upper surface and the side surface of the porous filter cylinder 4 respectively leave a spacing space with the lower side of the upper cover plate 2 and the inner wall of the shell 6 so as to enlarge the flow area of water flow. The lower end of the porous filter cartridge 4 is provided with an outer flange 14, the outer diameter of the outer flange 14 is slightly smaller than the inner diameter of the shell 6, and a gap is reserved between the outer flange 14 and the shell so that impurities cannot pass through the gap and the filter cartridge is convenient to mount and dismount.
The annular bracket 7 is welded and fixed on the inner wall of the shell 6 close to the bottom, and plays a role in supporting the porous filter cartridge 4 and also plays a certain role in sealing.
The utility model discloses the operation divide into prefiltering stage and two steps in back flush stage, and two steps are gone on in turn:
1) a pre-filtering stage: when the blowdown valve 12 is closed and the water inlet valve 8 is opened, the pre-filtration treatment is performed. Raw water enters the filter from a water inlet 9 through a water inlet valve 8, and water flows through the porous filter cartridge 4 from bottom to top and then flows out from a water outlet 1 of the upper cover plate 2. Due to the interception function of the conical filter holes 13 on the filter cartridge, large impurities commonly seen in rural drinking water such as branches, leaves, small fishes, shrimps and the like in raw water are intercepted in the porous filter cartridge 4, and filtrate flows out of the filter through the water outlet 1.
2) A backwashing stage: along with the proceeding of the filtering operation, the sundries trapped in the porous filter cylinder 4 are increased continuously, which leads to the blockage of the filter holes and the reduction of the filtering efficiency, at the moment, the numerical value of the differential pressure gauge 5 with two ends respectively connected with the water inlet side and the water outlet side is increased to a preset differential pressure value, the differential pressure gauge 5 transmits a signal to the control system, the control system closes the water inlet valve 8 and opens the blow-off valve 12, at the moment, the blow-off port 11 forms low pressure, then the residual water on the upper layer of the sand layer in the filter and the water in the water outlet pipeline are directly refluxed, the back washing is automatically carried out, the water flow enters the filter from the water outlet 1, flows through the porous filter cylinder 4 from top to bottom in the direction opposite to the pre-filtered water flow, the sundries are separated from the porous filter cylinder 4 and taken away along with the water flow, and are discharged through the blow-off port 11.
Claims (6)
1. An automatic back flush prefilter characterized in that: mainly comprises an upper cover plate (2), a shell (6) and a lower cover plate (10); the upper end and the lower end of a shell (6) are respectively connected and installed with an upper cover plate (2) and a lower cover plate (10), a porous filter cylinder (4) is arranged in the shell (6), an outer flange (14) is arranged at the lower end of the porous filter cylinder (4), the outer flange (14) is placed on an annular support (7) fixed on the inner wall of the shell (6), the upper end of the porous filter cylinder (4) is pressed by a stop block (3) protruding from the bottom surface of the upper cover plate (2), a water inlet (9) is formed in the bottom of the shell (6), the water inlet (9) is located below the porous filter cylinder (4), and the water inlet (9) is connected with a drinking water source water intake pipeline through a water inlet valve (8); a water outlet (1) is arranged in the center of the upper cover plate (2), a sewage draining outlet (11) is arranged in the center of the lower cover plate (10), and the sewage draining outlet (11) is connected with a sundries collecting device through a sewage draining valve (12); the shell (6) is externally provided with a differential pressure meter (5), and the differential pressure meter (5) is respectively communicated with the inside of the top and the inside of the bottom of the shell (6).
2. An automatic backwash pre-filter as in claim 1 wherein:
the differential pressure meter (5) is respectively communicated with the top of the shell (6) above the porous filter cylinder (4) and the bottom of the porous filter cylinder (4).
3. An automatic backwash pre-filter as in claim 1 wherein:
the lower side of the porous filter cylinder (4) is opened, the upper surface and the peripheral side surface of the porous filter cylinder (4) are both provided with conical filter holes (13) with uniform sizes, and the inner side pore diameter of each conical filter hole (13) is larger than the outer side pore diameter.
4. An automatic backwash pre-filter as in claim 1 wherein:
and spacing spaces are reserved between the upper surface of the porous filter cylinder (4) and the lower side of the upper cover plate (2) and between the side surface of the porous filter cylinder (4) and the inner wall of the shell (6).
5. An automatic backwash pre-filter as in claim 1 wherein:
the lower end of the porous filter cylinder (4) is provided with an outer flange (14), the outer diameter of the outer flange (14) is smaller than the inner diameter of the shell (6), and a gap is reserved between the outer flange and the shell.
6. An automatic backwash pre-filter as in claim 1 wherein:
the annular support (7) is welded and fixed on the inner wall of the shell (6) close to the bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120108275.2U CN214513057U (en) | 2021-01-15 | 2021-01-15 | Automatic back flush prefilter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120108275.2U CN214513057U (en) | 2021-01-15 | 2021-01-15 | Automatic back flush prefilter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214513057U true CN214513057U (en) | 2021-10-29 |
Family
ID=78302481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120108275.2U Active CN214513057U (en) | 2021-01-15 | 2021-01-15 | Automatic back flush prefilter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214513057U (en) |
-
2021
- 2021-01-15 CN CN202120108275.2U patent/CN214513057U/en active Active
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