Bendable expansion type filter plate, filter plate assembly and drum filter

Abstract

The utility model provides a bendable expansion type filter plate, a filter plate assembly and a rotary drum filter, and the bendable expansion type filter plate comprises a filter screen plate, a first butt joint plate and a second butt joint plate, the filter screen plate can be wound into a semi-arc shape, a first connecting part and a second connecting part are arranged at the two ends of the filter screen plate in the first direction respectively, and the first connecting part is used for being connected with the second connecting part of another bendable expansion type filter plate or connected with the end of the rotary drum filter. The second connecting part is used for being connected with the first connecting part of another bendable and expandable filter plate or connected with the end part of the rotary drum filter; the first butt-joint plate and the second butt-joint plate are connected with the two ends of the filter screen plate in the second direction respectively. For a drum filter with a short length, the two bendable and expandable filter plates can be wound into a whole circle, and for a drum filter with a long length, the length requirement is met by splicing the multiple bendable and expandable filter plates in the axis direction, so that the applicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a bendable and expandable filter plate, a filter plate assembly and a drum filter. Background Art

[0002] A drum filter is a continuous filter with a filtering surface on the surface of a cylindrical drum, and a filter screen is arranged on the drum surface of the drum.

[0003] In the prior art, generally, a filter plate is supported by a support plate, and then the filter plate is pressed on the support plate by two pressing strips. The filter plate is generally of an integral design. When the length of the drum filter is relatively long, the existing filter plates of conventional sizes cannot meet its length requirements. Summary of the Utility Model

[0004] In view of this, the utility model provides a bendable and expandable filter plate, a filter plate assembly and a drum filter to solve the technical problem that the filter plate is generally of an integral design in the above background art, and when the length of the drum filter is relatively long, the existing filter plates of conventional sizes cannot meet its length requirements.

[0005] The technical solution of the utility model is realized as follows:

[0006] In a first aspect, the utility model provides a bendable and expandable filter plate for use in a drum filter, which includes a filter screen plate, a first docking plate and a second docking plate, wherein:

[0007] The filter screen plate can be wound into a semi-circular arc shape. A filter grid is arranged on one side of the filter screen plate. The two ends of the filter screen plate along a first direction are respectively provided with a first connection part and a second connection part. The first direction is perpendicular to the winding direction of the filter screen plate. The first connection part is used for connecting the second connection part of another bendable and expandable filter plate or connecting the end of the drum filter. The second connection part is used for connecting the first connection part of another bendable and expandable filter plate or connecting the end of the drum filter;

[0008] The first docking plate and the second docking plate are respectively connected to the two ends of the filter screen plate along a second direction, and both are located on the back of the filter grid. The second direction is perpendicular to the first direction. The first docking plate and the second docking plate can be detachably connected when the filter screen plate is wound into a semi-circular arc shape.

[0009] On the basis of the above technical solution, preferably, the first connection part is connected to the second connection part of another filter screen plate. One of the first connection part and the second connection part is a clamping protrusion, and the other is a clamping groove.

[0010] Based on the above technical solutions, preferably, the first connecting portion is used to connect the end of the drum filter, and the first connecting portion is a clamping groove.

[0011] Based on the above technical solutions, preferably, the second connecting portion is used to connect the end of the drum filter, and the second connecting portion is a clamping groove.

[0012] Based on the above technical solutions, preferably, it further includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib is respectively connected to the filter screen plate and the first docking plate, and the first reinforcing rib is respectively connected to the filter screen plate and the second docking plate.

[0013] In a second aspect, the present utility model proposes a filter plate assembly, which is wound by at least two bendable and expandable filter plates described in the first aspect. For two bendable and expandable filter plates located on the same circle, the first docking plate of one of the bendable and expandable filter plates is detachably connected to the second docking plate of the other bendable and expandable filter plate.

[0014] Based on the above technical solutions, preferably, there are two bendable and expandable filter plates. After the two bendable and expandable filter plates are wound, they form a complete circle. The first connecting portion and the second connecting portion are respectively used to connect the two ends of the drum filter.

[0015] Based on the above technical solutions, preferably, there are four bendable and expandable filter plates. After the four bendable and expandable filter plates are spliced along the axial direction, they are wound into a complete circle; for two of the bendable and expandable filter plates, their first connecting portions are used to connect one end of the drum filter, and their second connecting portions are connected to the first connecting portions of the other two bendable and expandable filter plates; the second connecting portions of the other two bendable and expandable filter plates are used to connect the other end of the drum filter.

[0016] Based on the above technical solutions, preferably, there are at least six bendable and expandable filter plates. After the at least six bendable and expandable filter plates are spliced along the axial direction, they are wound into a complete circle;

[0017] For the four bendable and expandable filter plates at both ends, for two of the bendable and expandable filter plates, their first connecting portions are used to connect one end of the drum filter, and their second connecting portions are connected to the first connecting portions of the adjacent bendable and expandable filter plates; for the other two bendable and expandable filter plates, their first connecting portions are connected to the second connecting portions of the adjacent bendable and expandable filter plates, and their second connecting portions are used to connect the other end of the drum filter;

[0018] For the other bendable and expandable filter plates, the first connecting portion thereof is connected to the second connecting portion of the adjacent bendable and expandable filter plate, and the second connecting portion thereof is connected to the first connecting portion of the adjacent bendable and expandable filter plate.

[0019] In a third aspect, the present utility model provides a drum filter, which includes a drum body, two end plates, two positioning rings, two support rings, and the filter plate assembly described in the second aspect;

[0020] The two positioning rings are respectively connected to the first connecting portion and the second connecting portion at the two ends of the filter plate assembly;

[0021] An arc groove is provided on the outer wall of the support ring. The support ring is connected to the end plate and supports on the inner wall of the filter plate assembly, and the arc groove is clamped on the positioning ring;

[0022] The two end plates are respectively connected to the two ends of the filter plate assembly and are connected to the drum body.

[0023] The bendable and expandable filter plate of the present utility model has the following beneficial effects compared with the prior art:

[0024] (1) When the filter mesh plate is wound into a semi-circular arc shape, the first docking plate and the second docking plate are detachably connected. The first connecting portion and the second connecting portion are respectively arranged at the two ends of the filter mesh plate along the first direction. The first connecting portion is used to connect the second connecting portion of another bendable and expandable filter plate or connect to the end of the drum filter, and the second connecting portion is used to connect the first connecting portion of another bendable and expandable filter plate or connect to the end of the drum filter. For a drum filter with a shorter length, two bendable and expandable filter plates can be wound into a complete circle. For a drum filter with a longer length, the length requirement can be met by splicing multiple bendable and expandable filter plates along the axial direction, and its applicability is better;

[0025] (2) When the first connecting portion is connected to the second connecting portion of another filter mesh plate, one of the first connecting portion and the second connecting portion is a clamping protrusion and the other is a clamping groove. The connection between the first connecting portion and the second connecting portion of two adjacent bendable and expandable filter plates is realized through the clamping protrusion and the clamping groove, and the connection is relatively convenient and fast, which is convenient for installation and disassembly;

[0026] (3) The first reinforcing rib is respectively connected to the filter mesh plate and the first docking plate, and the first reinforcing rib is respectively connected to the filter mesh plate and the second docking plate, so as to strengthen the strength of the first docking plate and the second abutting plate, improve the connection strength after being wound into a semi-circular arc shape, and improve the reliability and stability of the device;

[0027] (4) It is wound by the filter plate assembly which is composed of at least two bendable and expandable filter plates described in the at least two first aspects. More than four bendable and expandable filter plates are first spliced along the axial direction and then wound, so as to realize the expansion of the length of the filter plate assembly to meet the length requirement of the drum filter, thereby improving the applicability;

[0028] (5) It is connected to the first connecting part and the second connecting part at both ends of the filter plate assembly through the two positioning rings respectively; an arc groove is arranged on the outer wall of the support ring, the support ring is connected to the end plate and supported on the inner wall of the filter plate assembly, and the arc groove is clamped on the positioning ring, so as to realize the installation and fixed support of the filter plate assembly, and the installation is relatively convenient and the support effect is good. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0030] Figure 1 Isometric view of the bendable and expandable filter plate of the present invention Figure 1 ;

[0031] Figure 2 Isometric view of the bendable and expandable filter plate of the present invention Figure 2 ;

[0032] Figure 3 Is the front view of the bendable and expandable filter plate of the present invention;

[0033] Figure 4 Is of the present invention Figure 3 Partial enlarged view of part I;

[0034] Figure 5 Is of the present invention Figure 3 Partial enlarged view of part II;

[0035] Figure 6 Is the structural schematic diagram of the unfolded splicing of two bendable and expandable filter plates of the present invention;

[0036] Figure 7 Is of the present invention Figure 6 Partial enlarged view of part III;

[0037] Figure 8 Is the structural schematic diagram of the unfolded splicing of three bendable and expandable filter plates of the present invention;

[0038] Figure 9 is a partial enlarged view of part Ⅳ in the present utility model; Figure 8

[0039] Figure 10 is a perspective view of the filter plate assembly of the present utility model;

[0040] Figure 11 is a perspective view of the drum filter of the present utility model;

[0041] Figure 12 is a cross-sectional view of the drum filter of the present utility model;

[0042] Figure 13 is a perspective view of the drum filter of the present utility model with the end plates removed;

[0043] Figure 14 is a perspective view of the drum filter of the present utility model with the end plates and support rings removed.

[0044] Description of reference numerals: 1 - filter mesh plate, 2 - first docking plate, 3 - second docking plate, 4 - first reinforcing rib, 5 - second reinforcing rib, 6 - end plate, 7 - positioning ring, 8 - support ring;

[0045] X - first direction, Y - second direction; A - clamping protrusion, B - clamping groove;

[0046] 11 - filter mesh plate body, 111 - filter mesh grid, 12 - first step, 121 - first connection part, 13 - second step, 131 - second connection part;

[0047] 21 - first connection hole;

[0048] 31 - second connection hole;

[0049] 81 - arc groove. Detailed implementation manners

[0050] Next, in combination with the implementation manners of the present utility model, the technical solutions in the implementation manners of the present utility model will be clearly and completely described. Obviously, the described implementation manners are only a part of the implementation manners of the present utility model, rather than all of the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts belong to the scope protected by the present utility model.

[0051] Referring to Figures 1 - 5 as shown, in the first - aspect embodiment of the present utility model, a bendable and expandable filter plate is proposed, which is used in a drum filter and includes a filter mesh plate 1, a first docking plate 2, and a second docking plate 3, wherein:

[0052] ​The filter screen plate 1 can be wound into a semi-circular arc shape. One side of the filter screen plate 1 is provided with filter meshes 111. The two ends of the filter screen plate 1 along the first direction X are respectively provided with a first connection part 121 and a second connection part 131. The first direction X is perpendicular to the winding direction of the filter screen plate 1. The first connection part 121 is used to connect the second connection part 131 of another bendable and expandable filter plate or connect the end of the drum filter. The second connection part 131 is used to connect the first connection part 121 of another bendable and expandable filter plate or connect the end of the drum filter. The filter screen plate 1 includes a filter screen plate body 11, a first step 12 and a second step 13. The first step 12 and the second step 13 are respectively arranged at both ends of the filter screen plate body 11. The first connection part 121 is arranged on the first step 12, and the second connection part 131 is arranged on the second step 13. The thickness of the filter screen plate body 11 is equal to the sum of the thicknesses of the first step 12 and the second step 13, so that after the first connection part 121 and the second connection part 131 are connected, the surface of the assembled filter screen assembly is flat. When there is only one bendable and expandable filter plate and no splicing is required, both the first step 12 and the second step 13 are located on the top surface of the filter screen plate body 11. When there are multiple bendable and expandable filter plates and splicing is required, the first step 12 and the second step 13 are respectively located on the top surface and the bottom surface of the filter screen plate body 11.

[0053] The first docking plate 2 and the second docking plate 3 are respectively connected to the two ends of the filter screen plate 1 along the second direction Y, and both are located on the back of the filter meshes 111. The second direction Y is perpendicular to the first direction X. The first docking plate 2 and the second docking plate 3 can be detachably connected when the filter screen plate 1 is wound into a semi-circular arc shape. When the filter screen plate 1 is in a flat state, the first docking plate 2 and the second docking plate 3 are perpendicular to the filter screen plate 1. When the filter screen plate 1 is wound into a semi-circular arc shape, for two semi-circular arc-shaped bendable and expandable filter plates, the first docking plate 2 of one and the second docking plate 3 of the other are in contact, and both are arranged on the outer wall of the semi-circular arc along the diameter direction of the semi-circular arc, which is convenient for connecting the first docking plate 2 and the second docking plate 3. A plurality of first connection holes 21 are arranged on the first docking plate 2, and second connection holes 31 matching the first connection holes 21 are arranged on the second docking plate 3. The first docking plate 2 and the second docking plate 3 are detachably connected by passing bolts through the first connection holes 21 and the second connection holes 31 and then locking with nuts.

[0054] The bendable and expandable filter plate provided in this embodiment is detachably connected to the first docking plate 2 and the second docking plate 3 when the filter screen plate 1 is wound into a semi-circular arc shape. For a drum filter with a short length, two bendable and expandable filter plates can be wound into a complete circle. For a drum filter with a long length, multiple bendable and expandable filter plates can be spliced along the axial direction to meet the length requirement, and its applicability is better.

[0055] In some embodiments, the first connecting portion 121 is connected to the second connecting portion 131 of another filter screen plate 1. One of the first connecting portion 121 and the second connecting portion 131 is a clamping protrusion A, and the other is a clamping groove B. The clamping protrusion A is formed by the surface of the first step 12 or the second step 13 protruding outward, and the clamping groove B is formed by the surface of the first step 12 or the second step 13 recessing inward. The connection between the first connecting portion 121 and the second connecting portion 131 of two adjacent bendable and expandable filter plates is realized through the clamping protrusion A and the clamping groove B, and the connection is relatively convenient and fast, which is convenient for installation and disassembly. In actual setting, both the clamping protrusion A and the clamping groove B are located in the middle of the surfaces of the first step 12 and the second step 13, which is convenient for the contact area between the first connecting portion 121 and the second connecting portion 131, and the first step 12 and the second step 13 to be larger, thereby improving the connection stability and strength.

[0056] In some embodiments, the first connecting portion 121 is used to connect the end of the drum filter, and the first connecting portion 121 is a clamping groove B. The first connecting portion 121 is formed by the surface of the first step 12 recessing inward. After the filter screen plate 1 is wound into a semi-circular arc shape, the first connecting portion 121 is located on the inner wall of the semi-circular arc shape. Through the design of the clamping groove B, it is convenient for the end of the drum filter to extend into the inner wall of the semi-circular arc shape to be connected with the first connecting portion 121, improving the reliability and stability of the device.

[0057] In some embodiments, the second connecting portion 131 is used to connect the end of the drum filter, and the second connecting portion 131 is a clamping groove B. The second connecting portion 131 is formed by the surface of the second step 13 recessing inward. After the filter screen plate 1 is wound into a semi-circular arc shape, the second connecting portion 131 is located on the inner wall of the semi-circular arc shape. Through the design of the clamping groove B, it is convenient for the end of the drum filter to extend into the inner wall of the semi-circular arc shape to be connected with the first connecting portion 121, improving the reliability and stability of the device.

[0058] In some embodiments, the bendable and expandable filter plate further includes a first reinforcing rib 4 and a second reinforcing rib 5. The first reinforcing rib 4 is respectively connected to the filter screen plate 1 and the first docking plate 2, and the first reinforcing rib 4 is respectively connected to the filter screen plate 1 and the second docking plate 3. After the filter screen plate 1 is wound into a semi-circular arc shape, both the first reinforcing rib 4 and the second reinforcing rib 5 are located outside the semi-circular arc shape. By connecting the first reinforcing rib 4 to the filter screen plate 1 and the first docking plate 2 respectively, and connecting the first reinforcing rib 4 to the filter screen plate 1 and the second docking plate 3 respectively, the strength of the first docking plate 2 and the second abutting plate is enhanced, the connection strength after being wound into a semi-circular arc shape is improved, and the reliability and stability of the device are enhanced.

[0059] In the second aspect embodiment of the present utility model, in combination with Figures 6 - 10 As shown, a filter plate assembly is proposed. The filter plate assembly is wound by at least two bendable and expandable filter plates according to the first aspect. For two bendable and expandable filter plates located on the same circle, the first docking plate 2 of one of the bendable and expandable filter plates is detachably connected to the second docking plate 3 of the other bendable and expandable filter plate. More than four bendable and expandable filter plates are first spliced along the axial direction and then wound, so as to realize the expansion of the length of the filter plate assembly to meet the length requirement of the drum filter, thereby improving the applicability.

[0060] In one embodiment, there are two bendable and expandable filter plates. After the two bendable and expandable filter plates are wound, they are assembled into a complete circle. The first connecting portion 121 and the second connecting portion 131 are respectively used to connect to the two ends of the drum filter. The first step 12 and the second step 13 are both located on the top surface of the filter screen plate body 11. The first connecting portion 121 and the second connecting portion 131 are both clamping grooves B, and the clamping grooves B are recessed inward from the bottoms of the first step 12 and the second step 13. The first connecting portion 121 and the second connecting portion 131 are both located on the inner wall of the filter plate assembly.

[0061] In another embodiment, four bendable expandable filter plates are provided. After the four bendable expandable filter plates are spliced along the axial direction, they are wound into a complete circle. Two of the bendable expandable filter plates (located on the same circle), their first connecting portions 121 are used to connect one end of the drum filter, and their second connecting portions 131 are connected to the first connecting portions 121 of the other two bendable expandable filter plates. The second connecting portions 131 of the other two bendable expandable filter plates (located on the same circle) are used to connect the other end of the drum filter. The first connecting portion 121 and the second connecting portion 131 connected to the end of the drum filter are both clamping grooves B. Through the design of the clamping grooves B, it is convenient for the end of the drum filter to extend into the semi-circular inner wall to be connected with the first connecting portion 121 or the second connecting portion 131, improving the reliability and stability of the device.

[0062] In another embodiment, at least six bendable expandable filter plates are provided. After at least six bendable expandable filter plates are spliced along the axial direction, they are wound into a complete circle. Here, six bendable expandable filter plates are taken as an example for illustration;

[0063] For the four bendable expandable filter plates at both ends, two of the bendable expandable filter plates (located on the same circle), their first connecting portions 121 are used to connect one end of the drum filter, and their second connecting portions 131 are connected to the first connecting portions 121 of the adjacent bendable expandable filter plates. For the other two bendable expandable filter plates (located on the same circle), their first connecting portions 121 are connected to the second connecting portions 131 of the adjacent bendable expandable filter plates, and their second connecting portions 131 are used to connect the other end of the drum filter;

[0064] For the two bendable expandable filter plates in the middle, their first connecting portions 121 are connected to the second connecting portions 131 of the adjacent bendable expandable filter plates, and their second connecting portions 131 are connected to the first connecting portions 121 of the adjacent bendable expandable filter plates.

[0065] In other embodiments, for the case of more than six bendable expandable filter plates, the four bendable expandable filter plates at both ends are the same as the above six bendable expandable filter plates, and for the other bendable expandable filter plates in the middle, refer to the case of the above six bendable expandable filter plates.

[0066] In the third aspect embodiment of the present utility model, a drum filter is proposed, in combination with Figures 11 - 14 As shown, it includes a drum body, two end plates 6, two positioning rings 7 and two support rings 8, and the filter plate assembly described in the second aspect. In this embodiment, an example is given where the filter plate assembly is formed by winding two bendable expandable filter plates into a complete circle;

[0067] The two positioning rings 7 are respectively connected to the first connection part 121 and the second connection part 131 at the two ends of the filter plate assembly;

[0068] An arc groove 81 is arranged on the outer wall of the support ring 8. The support ring 8 is connected to the end plate 6 and supported on the inner wall of the filter plate assembly, and the arc groove 81 is clamped on the positioning ring 7. The support ring 8 can be formed by splicing two semi-circular rings. The splicing position of the support ring 8 can be staggered from the splicing position of the filter plate assembly. Half of the support ring 8 of the semi-circular ring can provide strength support at the splicing position of the filter plate assembly, so that the support effect can be better, the strength can be higher, and the stability and reliability can be improved;

[0069] The two end plates 6 are respectively connected to the two ends of the filter plate assembly and are connected to the drum body.

[0070] In the rotary drum filter proposed in this embodiment, the two positioning rings 7 are respectively connected to the first connection part 121 and the second connection part 131 at the two ends of the filter plate assembly; an arc groove 81 is arranged on the outer wall of the support ring 8. The support ring 8 is connected to the end plate 6 and supported on the inner wall of the filter plate assembly, and the arc groove 81 is clamped on the positioning ring 7, so as to realize the installation and fixed support of the filter plate assembly, and the installation is relatively convenient and the support effect is good.

[0071] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bendable and expandable filter plate for use in a rotary drum filter, characterized in that: It includes a filter plate, a first docking plate and a second docking plate, wherein: The filter plate can be rolled into a semicircular arc shape, a filter grid is provided on one side of the filter plate, and a first connection portion and a second connection portion are respectively provided at both ends of the filter plate along a first direction, the first direction is perpendicular to the winding direction of the filter plate, the first connection portion is used to connect to the second connection portion of another bendable and expandable filter plate or to connect to the end of the rotary drum filter, and the second connection portion is used to connect to the first connection portion of another bendable and expandable filter plate or to connect to the end of the rotary drum filter; The first docking plate and the second docking plate are respectively connected to the two ends of the second direction of the filter plate and are both located on the back of the filter mesh. The second direction is perpendicular to the first direction. The first docking plate and the second docking plate are used for detachable connection when the filter plate is rolled into a semicircular arc shape.

2. The bendable and expandable filter plate according to claim 1, characterized in that: The first connection portion is connected to the second connection portion of another filter plate, and one of the first connection portion and the second connection portion is a clamping protrusion, and the other is a clamping groove.

3. The bendable and expandable filter plate according to claim 1, characterized in that: The first connection portion is used to connect the end of the rotary drum filter, and the first connection portion is a clamping groove.

4. The bendable and expandable filter plate according to claim 1, characterized in that: The second connecting portion is used to connect the end of the rotary drum filter, and the second connecting portion is a clamping groove.

5. The bendable and expandable filter plate according to claim 1, characterized in that: It also includes a first reinforcing rib and a second reinforcing rib, wherein the first reinforcing rib is connected to the filter plate and the first docking plate respectively, and the first reinforcing rib is connected to the filter plate and the second docking plate respectively.

6. A filter plate assembly, characterized in that: The filter plate assembly is formed by winding at least two bendable and expandable filter plates as described in any one of claims 1 to 5, and the two bendable and expandable filter plates are located on the same circle, and the first docking plate of one of the bendable and expandable filter plates is detachably connected to the second docking plate of the other bendable and expandable filter plate.

7. The filter plate assembly according to claim 6, characterized in that The two bendable and expandable filter plates are provided, and the two bendable and expandable filter plates are rolled up to form a full circle, and the first connecting portion and the second connecting portion are respectively used to connect with the two ends of the rotary drum filter.

8. The filter plate assembly according to claim 6, characterized in that: Four bendable and expandable filter plates are arranged, and the four bendable and expandable filter plates are spliced ​​along the axial direction and then rolled into a full circle; two of the bendable and expandable filter plates have a first connection portion used to connect one end of the rotary drum filter, and a second connection portion connected to the first connection portions of the other two bendable and expandable filter plates; the second connection portions of the other two bendable and expandable filter plates are used to connect the other end of the rotary drum filter.

9. The filter plate assembly according to claim 6, characterized in that: At least six bendable and expandable filter plates are provided, and at least six bendable and expandable filter plates are spliced ​​along the axial direction and then rolled into a full circle; Four bendable and expandable filter plates at both ends, wherein two of the bendable and expandable filter plates have first connection portions for connecting one end of the drum filter, and second connection portions are connected to the first connection portions of the adjacent bendable and expandable filter plates; and the other two bendable and expandable filter plates have first connection portions for connecting the second connection portions of the adjacent bendable and expandable filter plates, and second connection portions are used to connect the other end of the drum filter; The first connection portion of the other bendable and expandable filter plates is connected to the second connection portion of the adjacent bendable and expandable filter plates, and the second connection portion is connected to the first connection portion of the adjacent bendable and expandable filter plates.

10. A rotary drum filter, characterized in that: It comprises a drum body, two end plates, two positioning rings and two supporting rings, and a filter plate assembly according to any one of claims 6 to 9; The two positioning rings are respectively connected to the first connecting portion and the second connecting portion at both ends of the filter plate assembly; The outer wall of the support ring is provided with an arc groove, the support ring is connected to the end plate and supported on the inner wall of the filter plate assembly, and the arc groove is clamped on the positioning ring; The two end plates are respectively connected to the two ends of the filter plate assembly and are connected to the drum body.

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