Filtering lamination and filter

Abstract

The utility model relates to a filter lamination and a filter, and the filter lamination comprises an annular lamination main body, a broken-line-shaped barrier belt and a plurality of annular barrier belts, the broken-line-shaped blocking belt is formed by connecting a plurality of first blocking belts end to end to form a plurality of liquid inlet flow channels with outward openings and a plurality of liquid outlet flow channels with inward openings, and the widths of the liquid inlet flow channels are gradually reduced in the direction away from the openings; a plurality of annular barrier belts are vertically distributed on the second surface of the annular lamination main body in a concentric circle mode, every two adjacent annular barrier belts in all the annular barrier belts form a liquid crossing space, and the broken-line-shaped barrier belt of one filter lamination is in lap joint with the annular barrier belt of the other filter lamination. And each liquid inlet flow channel is communicated with the adjacent liquid outlet flow channel through a liquid crossing space. The filter has the beneficial effects that the blockage of the filter can be effectively reduced; meanwhile, the cleaning time of the filter is shortened, the self-cleaning efficiency of the filter is improved, and the reverse cleaning frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and in particular to a filter disc and a filter. Background Technology

[0002] Disc filters are widely used in agricultural irrigation, industrial water treatment, and other fields. Their working principle relies on multiple built-in annular discs. Each disc has multiple grooves evenly spaced on its two sides, extending from the outer edge to the inner edge of the disc. These grooves intersect to form a complex filtration channel, effectively intercepting suspended particles in the water. Furthermore, disc filters can achieve self-cleaning through backwashing, reducing maintenance requirements.

[0003] However, disc filters face several challenges in practical applications. First, when treating water sources with high concentrations of suspended solids, tiny particles easily accumulate inside the channels, causing localized blockages, increasing system pressure loss, and shortening equipment maintenance cycles. Second, backwashing may not be thorough enough, and the water flow may not completely remove impurities remaining between the discs, especially sticky substances or fibrous impurities that easily adhere to the inside of the channels, requiring manual disassembly and cleaning for thorough removal. Incomplete cleaning can also cause the discs to stick together due to the influence of organic matter or chemical impurities in the water, affecting subsequent filtration efficiency. Finally, the discs in the filter are prone to damage due to water pressure during long-term use, affecting the filtration effect. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a filter disc and filter, which solves the technical problems of easy clogging between existing filter discs, incomplete backwashing, and short service life.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] In a first aspect, the present invention provides a filter stack, comprising an annular stack body, a zigzag barrier band, and multiple annular barrier bands;

[0009] The zigzag barrier band is circular and perpendicular to the axis of the annular stack body. The zigzag barrier band is formed by connecting multiple first barrier bands end to end to form multiple outward-facing liquid inlet channels and multiple inward-facing liquid outlet channels. The liquid inlet channels and the liquid outlet channels are alternately distributed along the circumference of the annular stack body. The width of the liquid inlet channel gradually decreases in the direction away from the opening.

[0010] Multiple annular barrier bands are arranged in concentric circles and vertically distributed on the second surface of the annular stack body. Each pair of adjacent annular barrier bands forms a liquid overflow space, and the spacing between each pair of adjacent annular barrier bands decreases from the outside to the inside.

[0011] When two filter discs are stacked, the zigzag barrier band of one filter disc overlaps the annular barrier band of the other filter disc, and each inlet channel is connected to its adjacent outlet channel through the liquid traversal space.

[0012] Optionally, in the filter stack, the height of all the annular barrier bands decreases sequentially from the outside to the inside along the direction of the annular stack body.

[0013] Optionally, the height of the zigzag barrier gradually increases along the direction from the outside to the inside of the annular stacked body of the filter stack, so that when two filter stacks are stacked, the annular stacked bodies of the two filter stacks are parallel.

[0014] Optionally, in the filter stack, two adjacent first barrier strips are connected by an arc-shaped plate, and the arc-shaped plate forms the closed end of the liquid inlet channel / liquid outlet channel;

[0015] The two sides of the arc-shaped plate are provided with horizontally extending first drainage grooves, and the two ends of the first drainage grooves extend to two first barrier strips that are connected to each other.

[0016] Optionally, in the filter stack, a second drainage groove is provided at intervals on both sides of the first barrier strip, and the extension direction of the second drainage groove is consistent with the extension direction of the first barrier strip.

[0017] Optionally, in the filter stack, both the first and second drainage channels have triangular cross-sections.

[0018] Optionally, the filter stack can extend to the second drainage groove at both ends of the first barrier strip and communicate with the adjacent first drainage groove.

[0019] Optionally, in the filter stack, the opening width of the second drainage groove is ≤8μm.

[0020] Secondly, this utility model provides a filter comprising a plurality of filter discs stacked sequentially.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of this utility model are as follows: This utility model provides a filter disc and filter system. Due to the zigzag-shaped barrier bands forming multiple outward-facing inlet channels and multiple inward-facing outlet channels, the inlet and outlet channels are alternately distributed circumferentially along the main body of the annular disc. The width of the inlet channels gradually decreases away from the opening. Simultaneously, the distance between adjacent annular barrier bands decreases along the axial direction of the annular disc (i.e., the overall flow direction of the water). Thus, during the filtration stage, the water to be filtered passes through the gradually narrowing inlet channels and the progressively decreasing liquid overflow space, achieving step-by-step filtration of sediment of different particle sizes in the water. The stepped groove design intercepts sediment of different particle sizes in the outer filter channels, making the disc filter suitable for filtering complex sandy water sources and reducing the frequency of clogging. In the reverse self-cleaning stage, it facilitates the removal of sediment accumulated within the discs, ensuring thorough cleaning. Compared to existing technologies, it effectively reduces filter clogging; simultaneously, it reduces filter cleaning time, improves filter self-cleaning efficiency, and reduces the frequency of backwashing. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of a filter stack according to Embodiment 1 of the present invention;

[0024] Figure 2 for Figure 1 A bottom view of the filter stack in the middle;

[0025] Figure 3 for Figure 1 A top view of the filter stack in the image;

[0026] Figure 4 for Figure 3 A schematic cross-sectional view of the filter stack at point AA;

[0027] Figure 5 for Figure 4 Enlarged schematic diagram of region B of the filter stack;

[0028] Figure 6 This is a three-dimensional schematic diagram of the combined state of the filter discs in Embodiment 2 of the present invention.

[0029] Figure 7 for Figure 6 A schematic cross-sectional view of the filter discs at DD in the filter;

[0030] Figure 8 for Figure 6 A schematic diagram illustrating the working principle of the filter discs in the filter.

[0031] Figure 9 for Figure 8 Enlarged diagram of area C.

[0032] [Explanation of Labels in the Attached Image]

[0033] 1: Filter discs; 11: Annular disc body; 12: Zigzag barrier band; 121: First barrier band; 1211: Second drainage channel; 122: Arc plate; 1221: First drainage channel; 12a: Liquid inlet channel; 12b: Liquid outlet channel; 13: Annular barrier band; 13a: Liquid overflow space; 2: Sediment. Detailed Implementation

[0034] This utility model proposes a filter disc and filter that addresses the technical problems of easy clogging, incomplete backwashing, and short service life of existing filter discs. The zigzag-shaped barrier bands form multiple outward-facing inlet channels and multiple inward-facing outlet channels, which are alternately distributed circumferentially along the main body of the annular disc. The width of the inlet channels gradually decreases away from the opening. Simultaneously, the spacing between adjacent annular barrier bands decreases along the axial direction of the main body of the annular disc (i.e., the overall flow direction of the water). Thus, during the filtration stage, the water to be filtered passes through the gradually narrowing inlet channels and the progressively decreasing liquid turbulence space, achieving step-by-step filtration of sediment of different particle sizes in the water. The stepped groove design intercepts sediment of different particle sizes in the outer filter channels, making the disc filter suitable for filtering complex sandy water sources and reducing the frequency of clogging. During the reverse self-cleaning stage, it facilitates the removal of sediment accumulated within the discs, ensuring thorough cleaning. It can effectively reduce filter clogging; at the same time, it reduces filter cleaning time, improves filter self-cleaning efficiency, and reduces the frequency of backwashing.

[0035] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0036] Example 1:

[0037] See attached document Figures 1 to 9This embodiment provides a filter disc 1, including an annular disc body 11, a zigzag barrier band 12, and multiple annular barrier bands 13. The zigzag barrier band 12 is annular and perpendicularly disposed on the first surface of the annular disc body 11 relative to its axis. The zigzag barrier band 12 is composed of multiple first barrier bands 121 connected end to end, forming multiple inlet channels 12a with openings facing the outer edge of the annular disc body 11 and multiple outlet channels 12b with openings facing the inner edge of the annular disc body 11. The inlet channels 12a and outlet channels 12b are alternately distributed circumferentially along the annular disc body 11, and adjacent inlet channels 12a and outlet channels 12b are separated by the first barrier bands 121. At the same time, the width of the inlet channel 12a gradually decreases in the direction away from the opening, forming a gradually narrowing inlet channel 12a according to the internal liquid flow direction. The width of the liquid outlet channel 12b gradually decreases in the direction away from its opening, forming a gradually widening liquid outlet channel 12b in accordance with the internal liquid flow direction. The first barrier band 121 is of uniform thickness.

[0038] Multiple annular barrier bands 13 are concentrically and vertically distributed on the second surface of the annular stack body 11. Each pair of adjacent annular barrier bands 13 forms a liquid overflow space 13a, through which liquids in adjacent inlet channels 12a and outlet channels 12b flow together. Specifically, the overflow process involves the liquid in adjacent channels passing through the liquid overflow space 13a over the first barrier band 121 between them. The spacing between each pair of adjacent annular barrier bands 13 decreases from the outside inwards, forming progressively smaller liquid overflow spaces 13a.

[0039] See Figure 8 and Figure 9 The arrows indicate the direction of water flow overturning. When two filter plates are stacked, the zigzag barrier band 12 of one filter plate overlaps the annular barrier band 13 of the other filter plate. Each inlet channel 12a is connected to its adjacent outlet channel 12b through a liquid overturning space 13a. Thus, during the filtration stage, the water to be filtered flows in from the inlet channel 12a, passes through the progressively narrowing liquid overturning space 13a, and overturns to the adjacent outlet channel 12b. During this process, the water to be filtered passes through the gradually narrowing inlet channel 12a and the progressively narrowing liquid overturning space 13a, achieving step-by-step filtration of sediment 2 of different particle sizes in the water to be filtered. The inlet channel 12a, the liquid overturning space 13a, and the outlet channel 12b constitute the entire filtration channel.

[0040] During the filtration stage, the stepped groove design separates and intercepts sediment of different particle sizes in the outer filter channel, making the disc filter suitable for filtering complex sandy water sources and reducing the frequency of clogging. In the reverse self-cleaning stage (opposite to the filtration stage), it effectively removes sediment accumulated within the discs, ensuring thorough cleaning. This effectively reduces filter clogging and prevents excessive local pressure from affecting the disc filter's lifespan. It also reduces filter cleaning time, improves self-cleaning efficiency, and lowers the frequency of backwashing.

[0041] See attached document Figures 1 to 9 This embodiment provides a filter stack 1 in which the height of all annular barrier bands 13 decreases sequentially from the outside to the inside along the main body 11 of the annular stack. This creates a gradually decreasing space in both the height and spacing of the annular barrier bands 13, resulting in better step-by-step filtration of sediment. It should be noted that if the filter stack 1 is made of plastic, while the height of all annular barrier bands 13 decreases sequentially, the height of the overlapping zigzag barrier bands 12 remains unchanged. When two adjacent filter stacks 1 are stacked, all the main bodies 11 of the annular stack form a funnel shape with a cone angle close to 180°, which does not affect the overlap between the zigzag barrier bands 12 and the annular barrier bands 13 with their decreasing heights.

[0042] See attached document Figures 1 to 9 This embodiment provides a filter stack 1 in which the height of the zigzag barrier band 12 gradually increases from the outside to the inside along the annular stack body 11, so that when two filter stacks 1 are stacked, the annular stack bodies 11 of the two filter stacks 1 are parallel. This is more suitable for the stack material to be rigid, and it is convenient for the zigzag barrier band 12 to overlap with the annular barrier band 13 whose height decreases sequentially.

[0043] See attached document Figures 1 to 9 This embodiment provides a filter stack 1, in which two adjacent first barrier bands 121 are connected by an arc-shaped plate 122, which forms the closed end of the inlet channel 12a / outlet channel 12b. That is, the corners of the zigzag barrier bands 12 are arc-shaped, which helps to reduce the impact force of the water flow on the corners. Horizontally extending first guide grooves 1221 are provided at intervals on both sides of the arc-shaped plate 122. The two ends of the first guide grooves 1221 extend to the two connected first barrier bands 121 respectively. The arrangement of the first guide grooves 1221 helps to divide the water flow impacting the arc-shaped plate 122 into left and right streams, further reducing the impact force of the water flow on the corners.

[0044] See attached document Figures 1 to 9This embodiment provides a filter stack 1, in which second flow channels 1211 are provided at intervals on both sides of the first barrier band 121, and the extension direction of the second flow channels 1211 is consistent with the extension direction of the first barrier band 121. This facilitates reducing the resistance between the water flow and the first barrier band 121, and also facilitates the washing of silt during backwashing.

[0045] Reference Figure 5 The first and second drainage channels 1221 and 1211 both have triangular cross-sections. They are spaced apart, with the second drainage channel 1211 extending to both ends of the first barrier band 121 and communicating with its adjacent first drainage channel 1221, forming a continuous drainage channel. The combined effect of the first and second drainage channels 1221 and 1211 reduces water flow resistance and increases the service life of the stacked plates. The opening width of the second drainage channel 1211 is ≤8μm to prevent the silt filtered in the staged process from continuing to flow along it. It should be noted that both the first and second drainage channels 1221 and 1211 are relatively small triangular grooves, which can be created on the first barrier band 121 and the arc-shaped plate 122 using laser engraving.

[0046] Example 2:

[0047] Reference Figure 6 and Figure 7 This embodiment provides a filter comprising a plurality of filter discs 1 stacked sequentially as in Embodiment 1.

[0048] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A filter pack, characterized in that, It includes an annular stacked body (11), a zigzag barrier band (12), and multiple annular barrier bands (13); The zigzag barrier band (12) is annular and perpendicular to the axis of the annular stacked body (11) and is arranged on the first surface of the annular stacked body (11). The zigzag barrier band (12) is formed by connecting multiple first barrier bands (121) end to end to form multiple outward-facing liquid inlet channels (12a) and multiple inward-facing liquid outlet channels (12b). The liquid inlet channels (12a) and the liquid outlet channels (12b) are alternately distributed along the circumference of the annular stacked body (11). The width of the liquid inlet channel (12a) gradually decreases in the direction away from the opening. Multiple annular barrier bands (13) are arranged in concentric circles and vertically distributed on the second surface of the annular stack body (11). Each two adjacent annular barrier bands (13) form a liquid overflow space (13a), and the spacing between each two adjacent annular barrier bands (13) decreases from the outside to the inside. When two filter stacks are stacked, the zigzag barrier band (12) of one filter stack overlaps the annular barrier band (13) of the other filter stack, and each inlet channel (12a) is connected to its adjacent outlet channel (12b) through the liquid tumbling space (13a).

2. The filter pack of claim 1, wherein, Along the annular stacked body (11) from the outside to the inside, the height of all the annular barrier strips (13) decreases sequentially.

3. The filter pack of claim 2, wherein, Along the direction from the outside to the inside of the annular stacked body (11), the height of the zigzag barrier band (12) gradually increases so that when the two filter stacks are stacked, the annular stacked bodies (11) of the two filter stacks are parallel.

4. The filter pack of claim 1, wherein, Two adjacent first barrier strips (121) are connected by an arc plate (122), the arc plate (122) forming the closed end of the liquid inlet channel (12a) / the liquid outlet channel (12b); The arc-shaped plate (122) has horizontally extending first drainage grooves (1221) spaced apart on both sides, and the two ends of the first drainage grooves (1221) extend to two first barrier strips (121) that are connected to each other.

5. The filter pack of claim 4, wherein the filter pack is configured to be inserted into a filter holder. The first barrier strip (121) has second drainage grooves (1211) spaced apart on both sides, and the extension direction of the second drainage grooves (1211) is consistent with the extension direction of the first barrier strip (121).

6. The filter pack of claim 5, wherein the filter pack is configured to be inserted into a filter holder. The cross-sections of the first drainage channel (1221) and the second drainage channel (1211) are both triangular.

7. The filter pack of claim 5 wherein, The second drainage channel (1211) that extends to both ends of the first barrier strip (121) is connected to the adjacent first drainage channel (1221).

8. The filter pack of claim 5 wherein, The opening width of the second drainage groove (1211) is ≤8μm.

9. A filter characterized by, It comprises a plurality of filter sheets as described in any one of claims 1-8, stacked sequentially.

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