Filter stack and stacked filter

Abstract

The utility model provides a filter stack, including an annular stack, wherein the two side surfaces of the annular stack are evenly provided with multiple grooves, the two ends of each groove extend to the inner edge and the outer edge of the annular stack, the width of the groove gradually narrows from the outer edge to the inner edge, a plane barrier is formed between two adjacent grooves, and a plurality of pinhole-shaped blind holes are densely provided on the groove surface of each groove; the utility model also provides a stacked filter. The filter stack and the stacked filter have the advantages of scientific design, can reduce the resistance change caused by the blockage in the middle of the groove to a certain extent, can reduce the backwashing frequency, and are highly practical.

Description

Technical Field

[0001] The utility model relates to a filter, in particular to a filter stack and a stacked filter. Background Art

[0002] The laminated filter is a stack of plastic laminates (ring-shaped) of the same specifications stacked together. Grooves of a certain micron size are engraved on both sides of each plastic laminate. The inner circle of a stack of plastic laminates is sleeved on the inner support. During filtering, the two ends of the entire stack of plastic laminates are compressed by springs and fluid pressure. The greater the pressure difference, the stronger the compression force. The liquid flows from the outer edge of the plastic laminate through the groove to the inner edge of the plastic laminate, ensuring self-locking and efficient filtration. When a certain pressure difference or a set time is reached, the system enters the backwash state, the plastic laminates are loosened, and the backwash water is sprayed at high speed along the tangent direction of the plastic laminate, causing it to rotate and separate, and the impurities trapped outside are sprayed out.

[0003] Both ends of each groove on the traditional filter stack extend to the outer edge and the inner edge. Since the outer diameter of the plastic stack is large and the inner diameter is small, the groove is also wide at the outer edge and narrow at the inner edge. During filtration, some small particles of impurities will enter the groove and get stuck in the groove as they move toward the inner edge of the groove. When the raw water passes through the groove again, the resistance will increase significantly. When more and more grooves are blocked in the middle, the filtration resistance of the entire stack of plastic stacks will increase significantly, and they need to be backwashed in time.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0005] The utility model aims to address the deficiencies of the prior art and thus provide a filter stack and stacked filter which are scientifically designed, can alleviate resistance changes caused by blockage in the middle of the groove to a certain extent, can reduce backwashing frequency, and are highly practical.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a filter laminate, including an annular laminate, and a plurality of grooves are evenly opened on the two side surfaces of the annular laminate, and the two ends of each groove extend to the inner edge and the outer edge of the annular laminate. The width of the groove gradually narrows from the outer edge end to the inner edge end, and a plane barrier is formed between two adjacent grooves, and a plurality of pinhole-shaped blind holes are densely opened on the groove surface of each groove.

[0007] Based on the above, two liquid holes are opened through the middle position of the plane partition in the width direction, one of which is located in the middle position of the plane partition in the length direction, and the other is located near the outer edge end of the plane partition in the length direction.

[0008] Based on the above, the outer edge end of each groove is convex outward, and the outer edge end of each plane barrier is concave inward.

[0009] Based on the above, the cross section of the groove is in an arc shape.

[0010] The utility model also provides a laminated filter, which adopts the filter laminated sheets as described above.

[0011] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model has the following advantages:

[0012] (1) By densely opening a plurality of the pinhole-shaped blind holes in each groove, more space can be reserved for liquid to pass through the position in the middle of the groove that is blocked by small particles of impurities, thereby alleviating the increase in resistance caused by blockage to a certain extent, thereby reducing the frequency of backwashing.

[0013] (2) When the filter laminations are stacked together, the grooves on two adjacent annular laminations may be staggered at different angles, which will cause the channel aperture to change. When the staggered angle is larger, the channel aperture will be smaller. At this time, the liquid holes are also connected to the grooves, which can disperse the liquid into the adjacent annular laminations, thereby reducing the filtration resistance.

[0014] (3) The outer edge of the groove is convex outward, and the outer edge of the plane baffle is concave inward, so that the edge of the annular stack is serrated. During backwashing, the annular stack rotates faster, thereby accelerating the backwashing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the filter stack in Example 1.

[0016] Figure 2 It is a schematic diagram of the structure in which the filter laminations in Example 1 are stacked together.

[0017] Figure 3 This is a partial front view of the filter stack in Example 2.

[0018] In the figure: 1. Annular lamination; 2. Groove; 3. Plane baffle; 4. Pinhole-shaped blind hole; 5. Liquid hole. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described in detail below through specific implementation methods. Example 1

[0020] like Figure 1 and Figure 2As shown, a filter laminate comprises an annular laminate 1, and a plurality of grooves 2 are evenly formed on both side surfaces of the annular laminate 1, and both ends of each groove 2 extend to the inner edge and the outer edge of the annular laminate 1, and the width of the groove 2 gradually narrows from the outer edge end to the inner edge end, and the cross-section of the groove 2 is in the shape of an arc, and a plane baffle 3 is formed between two adjacent grooves 2, and a plurality of pinhole-shaped blind holes 4 are densely formed on the groove surface of each groove 2; two liquid through holes 5 are penetrated through the middle position of the plane baffle 3 in the width direction, one of the liquid through holes 5 is located in the middle position of the plane baffle 3 in the length direction, and the other liquid through hole 5 is located near the outer edge end of the plane baffle 3 in the length direction.

[0021] Working principle:

[0022] When in use, the whole stack of filter laminations are stacked together, and the raw water enters the inner edge of the annular lamination 1 through the groove 2 from the outer edge of the annular lamination 1, and some small particles of impurities enter the groove 2. During the movement, they will be stuck in the groove 2. Some of the pinhole-shaped blind holes 4 allow more space for liquid to pass through the blocked position, which to a certain extent reduces the increase in resistance caused by blockage; in addition, the grooves 2 on two adjacent annular laminations 1 may be staggered at different angles, which will cause the channel aperture to change. When the staggered angle is larger, the channel aperture is smaller. At this time, the liquid through hole 5 is also connected to the groove, which can disperse the liquid into the adjacent annular laminations 1 and reduce the filtration resistance; by reducing the filtration resistance, the frequency of backwashing is also reduced. Example 2

[0023] like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the outer edge end of each groove 2 is convex outward, and the outer edge end of each planar baffle 3 is concave inward; in this way, the edge of the annular stack 1 is serrated, and during backwashing, the annular stack 1 rotates faster, thereby accelerating the backwashing speed. Example 3

[0024] A laminated filter adopts the filter laminate in Example 1 or Example 2.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A filter laminate, characterized in that: It comprises an annular stack, and the two side surfaces of the annular stack are each evenly provided with a plurality of grooves, the two ends of each groove extend to the inner edge and the outer edge of the annular stack, the width of the groove gradually narrows from the outer edge end to the inner edge end, a plane barrier is formed between two adjacent grooves, and a plurality of pinhole-shaped blind holes are densely provided on the groove surface of each groove.

2. The filter stack according to claim 1, characterized in that: Two liquid holes are formed through the middle of the plane partition in the width direction, one of which is located in the middle of the plane partition in the length direction, and the other is located near the outer edge of the plane partition in the length direction.

3. The filter stack according to claim 2, characterized in that: The outer edge end of each groove is convex outward, and the outer edge end of each plane partition is concave inward.

4. The filter stack according to any one of claims 1 to 3, characterized in that: The cross section of the groove is in an arc shape.

5. A laminated filter, characterized in that: A filter stack as described in any one of claims 1 to 4 is used.

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