Novel filter cartridge structure

Abstract

The invention discloses a novel filter cartridge structure which comprises a cartridge body, an inner filter cartridge, an outer filter cartridge and a cover plate, the inner filter cylinder and the outer filter cylinder are both located in the cavity of the cylinder body, the outer filter cylinder sleeves the outer side of the inner filter cylinder, the inner filter cylinder comprises a plurality of first filter cylinder units which are detachably connected, the outer filter cylinder comprises a plurality of second filter cylinder units which are detachably connected, the first filter cylinder units are detachably connected in sequence in the vertical direction, and the second filter cylinder units are detachably connected in sequence in the vertical direction. Wherein the first filter cartridge unit close to the bottom of the cavity is welded and fixed to the bottom of the cartridge body, the second filter cartridge units are sequentially and detachably connected in the vertical direction, the second filter cartridge units close to the bottom of the cavity are welded and fixed to the bottom of the cartridge body, and the upper ends of the inner filter cartridge and the outer filter cartridge are detachably covered with cover plates. And the periphery of the cover plate is fixed with the inner wall of the cylinder body. The inner filter cartridge of the novel filter cartridge structure can be split into a plurality of first filter cartridge units, and the outer filter cartridge can be split into a plurality of second filter cartridge units, so that the novel filter cartridge structure is convenient to disassemble, replace and mount, the maintenance cost is reduced, and the maintenance efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste treatment equipment, and in particular to a novel filter cartridge structure. Background Art

[0002] The traditional high-volume resin adsorption column has two filter cartridges, the inner and outer filter cartridges are integral T-wire filter cartridges, and the two ends of the filter cartridge are welded to the lower head and the internal flat cover respectively. The filter cartridge is usually wound with T-wire and placed inside the resin column as a whole.

[0003] In actual applications, since the internal gas is often corrosive, and during welding or installation and transportation, the T-shaped winding wire is often damaged and needs to be replaced and maintained; and the traditional structure, since the inner and outer filter cartridges are integral structures and the upper and lower ends are welded structures, the head and flat cover often need to be cut when replaced, and once there is a slight damage, the filter cartridge needs to be replaced as a whole. This leads to increased costs, and the economy and replaceability are far behind the actual production requirements. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the filter cartridge in the prior art, such as difficulty in maintenance, high replacement cost and poor economy, thereby providing a new filter cartridge structure.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A novel filter cartridge structure comprises: a cylinder body, an inner filter cartridge, an outer filter cartridge and a cover plate; a cavity is provided in the cylinder body; the inner filter cartridge is arranged in the cavity, the lower end of the inner filter cartridge is fixedly welded to the bottom of the cylinder body, the inner filter cartridge comprises a plurality of detachably connected first filter cartridge units, and the plurality of first filter cartridge units are connected in sequence along the vertical direction; the outer filter cartridge is arranged in the cavity and sleeved on the outside of the inner filter cartridge, the lower end of the outer filter cartridge is fixedly welded to the bottom of the cylinder body, the outer filter cartridge comprises a plurality of detachably connected second filter cartridge units, and the plurality of second filter cartridge units are connected in sequence along the vertical direction; the cover plate is arranged in the cavity and fixedly connected to the inner wall of the cylinder body, and the cover plate is detachably covered on the upper ends of the inner filter cartridge and the outer filter cartridge.

[0007] According to some embodiments of the present invention, the cylinder body includes a cylinder wall and an upper head and a lower head respectively arranged at the upper and lower ends of the cylinder wall, the upper head is detachably connected to the upper end surface of the cylinder wall, the lower head is fixedly welded to the lower end surface of the cylinder wall, the bottoms of the inner filter cartridge and the outer filter cartridge are fixedly welded to the lower head, and a cache cavity is formed between the upper head and the cover plate.

[0008] According to some embodiments of the present invention, the lower head is provided with an inlet connected to the inner filter cartridge, the upper head is provided with an outlet connected to the cache cavity, a first flow channel is formed between the inner filter cartridge and the outer filter cartridge, a second flow channel is formed between the outer filter cartridge and the cylinder wall, a flow gap is present between the cover plate and the cylinder wall, and the second flow channel is connected to the cache cavity through the flow gap.

[0009] According to some embodiments of the present invention, the lower head is provided with a discharge port, and the discharge port is communicated with the first flow channel.

[0010] According to some embodiments of the present invention, the cover plate is provided with a plurality of first inspection holes connected to the inner filter cartridge, and the first inspection holes are covered with a first flange cover; the cover plate is provided with a plurality of second inspection holes connected to the outer filter cartridge, and the second inspection holes are covered with a second flange cover.

[0011] According to some embodiments of the present invention, a plurality of limit members are provided on the outer periphery of the cover plate, and the plurality of limit members are evenly spaced along the circumference of the cover plate. The limit members are fixedly connected to the cylinder wall, and two adjacent limit members, the cylinder wall and the cover plate are enclosed to form the flow gap.

[0012] According to some embodiments of the present invention, the first filter cartridge unit includes a first straight edge section, a first filter hole section, and a second straight edge section connected in sequence, the first straight edge section is provided with a first positioning ring plate, the second straight edge section is provided with a second positioning ring plate, and two adjacent first filter cartridge units are detachably connected via a first fastener, and the first fastener is arranged around the first positioning ring plate of one first filter cartridge unit and the second positioning ring plate of another first filter cartridge unit.

[0013] According to some embodiments of the present invention, the first fastener is a clamp, there are multiple clamps, and the clamps are semicircular or arc-shaped.

[0014] According to some embodiments of the present invention, the second filter cartridge unit includes a third straight edge segment, a second filter hole segment and a fourth straight edge segment connected in sequence, the third straight edge segment is provided with an upper ring plate, the fourth straight edge segment is provided with a lower ring plate, the upper ring plate is provided with a plurality of first connecting holes evenly spaced apart, the lower ring plate is provided with a plurality of second connecting holes evenly spaced apart, the plurality of first connecting holes and the plurality of second connecting holes are arranged in one-to-one correspondence, two adjacent second filter cartridge units are detachably connected by a second fastener, the second fastener is passed through the first connecting hole of one second filter cartridge unit and the second connecting hole of another second filter cartridge unit to connect the two adjacent second filter cartridge units.

[0015] According to some embodiments of the present invention, a first rib plate is provided between the lower surface of the upper ring plate and the third straight edge segment, and a plurality of the first rib plates are provided and are evenly spaced apart. A second rib plate is provided between the upper surface of the lower ring plate and the fourth straight edge segment, and a plurality of the second rib plates are provided and are evenly spaced apart.

[0016] The technical solution of the present invention has the following advantages:

[0017] 1. The present invention provides a new filter cartridge structure, in which both the inner filter cartridge and the outer filter cartridge are located in the cavity of the cylinder body, the outer filter cartridge is sleeved on the outside of the inner filter cartridge, the inner filter cartridge includes a plurality of detachably connected first filter cartridge units, and the outer filter cartridge includes a plurality of detachably connected second filter cartridge units, the plurality of first filter cartridge units are detachably connected in sequence along the vertical direction, wherein the first filter cartridge unit near the bottom of the cavity is welded and fixed to the bottom of the cylinder body, the plurality of second filter cartridge units are detachably connected in sequence along the vertical direction, wherein the second filter cartridge unit near the bottom of the cavity is welded and fixed to the bottom of the cylinder body, and a cover plate is detachably provided on the upper ends of the inner filter cartridge and the outer filter cartridge, and the outer periphery of the cover plate is fixed to the inner wall of the cylinder body. The inner filter cartridge of the new filter cartridge structure can be disassembled into a plurality of first filter cartridge units, and the outer filter cartridge can be disassembled into a plurality of second filter cartridge units, which are easy to disassemble and replace, convenient to install, reduce maintenance costs, and improve maintenance efficiency.

[0018] 2. The new filter cartridge structure provided by the present invention has a lower head that is welded and fixed to the cartridge wall, thereby ensuring the strength and stability of the structure; the upper head is detachably connected to the upper end of the cartridge wall, which is convenient for filling materials and for inspecting, repairing and replacing the internal structure, thereby saving repair costs.

[0019] 3. The new filter cartridge structure provided by the present invention has a first inspection hole connected to the inner filter cartridge and a second inspection hole connected to the outer filter cartridge on the cover plate, a first flange cover is provided on the first inspection hole, and a second flange cover is provided on the second inspection hole. When the new filter cartridge structure is in operation, the first flange cover and the second flange cover are fixedly mounted on the cover plate. When maintenance is required, the first flange cover and the second flange cover are opened. The setting of the first inspection hole and the second inspection hole provides convenience for maintenance.

[0020] 4. The new filter cartridge structure provided by the present invention has multiple limit members on the outer periphery of the cover plate, one end of the limit member is fixedly connected to the cover plate, and the other end is fixedly connected to the cartridge wall after installation. The setting of the limit member avoids the shaking of the cover plate. Since the inner filter cartridge and the outer filter cartridge are arranged vertically, when the heights of the inner filter cartridge and the outer filter cartridge are relatively high, under the action of external force, if the upper ends of the inner filter cartridge and the outer filter cartridge are not limited, shaking will occur, thereby affecting the stability of the structure. The limit member is fixedly connected to the cartridge wall, thereby limiting the inner filter cartridge and the outer filter cartridge and ensuring the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a novel filter cartridge structure provided in some embodiments of the present invention;

[0023] Figure 2 An exploded view of a novel filter cartridge structure provided in some embodiments of the present invention;

[0024] Figure 3 A structural view of an inner filter cartridge of a novel filter cartridge structure provided in some embodiments of the present invention;

[0025] Figure 4 It is a schematic structural diagram of a first filter cartridge unit provided in some embodiments of the present invention;

[0026] Figure 5 A structural view of an outer filter cartridge of a novel filter cartridge structure provided in some embodiments of the present invention;

[0027] Figure 6 It is a schematic structural diagram of a second filter cartridge unit provided in some embodiments of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the cover plate provided in some embodiments of the present invention.

[0029] Explanation of the reference numerals: 1. cylinder body; 2. inner filter cartridge; 3. outer filter cartridge; 4. cover plate; 11. cylinder wall; 12. lower end cap; 13. upper end cap; 121. inlet; 122. discharge port; 131. outlet; 21. first filter cartridge unit; 22. first fastener; 211. first straight edge section; 212. first filter hole section; 213. second straight edge section; 31. second filter cartridge unit; 311. third straight edge section; 312. second filter hole section; 313. fourth straight edge section; 314. upper ring plate; 315. lower ring plate; 316. first rib plate; 317. second rib plate; 41. stopper; 42. first inspection hole; 43. second inspection hole; 44. first flange cover; 45. second flange cover. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Reference Figures 1 to 7 As shown, the present invention proposes a new type of filter cartridge structure, including: a cylinder body 1, an inner filter cartridge 2, an outer filter cartridge 3 and a cover plate 4; a cavity is provided in the cylinder body 1; the inner filter cartridge 2 is arranged in the cavity, the lower end of the inner filter cartridge 2 is fixedly welded to the bottom of the cylinder body 1, and the inner filter cartridge 2 includes a plurality of detachably connected first filter cartridge units 21, and the plurality of first filter cartridge units 21 are connected in sequence along the vertical direction; the outer filter cartridge 3 is arranged in the cavity and sleeved on the outside of the inner filter cartridge 2, the lower end of the outer filter cartridge 3 is fixedly welded to the bottom of the cylinder body 1, the outer filter cartridge 3 includes a plurality of detachably connected second filter cartridge units 31, and the plurality of second filter cartridge units 31 are connected in sequence along the vertical direction; the cover plate 4 is arranged in the cavity and fixedly connected to the inner wall of the cylinder body 1, and the cover plate 4 is detachably covered on the upper ends of the inner filter cartridge 2 and the outer filter cartridge 3.

[0035] Specifically, the inner filter cartridge 2 and the outer filter cartridge 3 are both located in the cavity of the cylinder body 1, and the outer filter cartridge 3 is sleeved on the outer side of the inner filter cartridge 2. The inner filter cartridge 2 includes a plurality of detachably connected first filter cartridge units 21, and the outer filter cartridge 3 includes a plurality of detachably connected second filter cartridge units 31. The plurality of first filter cartridge units 21 are detachably connected in sequence along the vertical direction, wherein the first filter cartridge unit 21 near the bottom of the cavity is welded and fixed to the bottom of the cylinder body 1, and the plurality of second filter cartridge units 31 are detachably connected in sequence along the vertical direction, wherein the second filter cartridge unit 31 near the bottom of the cavity is welded and fixed to the bottom of the cylinder body 1, and the upper ends of the inner filter cartridge 2 and the outer filter cartridge 3 are detachably covered with a cover plate 4, and the outer periphery of the cover plate 4 is fixed to the inner wall of the cylinder body 1. The inner filter cartridge 2 of the novel filter cartridge structure can be disassembled into a plurality of first filter cartridge units 21, and the outer filter cartridge 3 can be disassembled into a plurality of second filter cartridge units 31, which are convenient for disassembly and replacement, convenient for installation, and reduce maintenance costs and improve maintenance efficiency.

[0036] Reference Figure 2 As shown, in some embodiments of the present invention, the cylinder body 1 includes a cylinder wall 11 and an upper head 13 and a lower head 12 respectively arranged at the upper and lower ends of the cylinder wall 11, the upper head 13 is detachably connected to the upper end surface of the cylinder wall 11, the lower head 12 is fixedly welded to the lower end surface of the cylinder wall 11, the bottoms of the inner filter cartridge 2 and the outer filter cartridge 3 are fixedly welded to the lower head 12, and a cache cavity is formed between the upper head 13 and the cover plate 4.

[0037] Specifically, the lower head 12 is welded and fixed to the cylinder wall 11 to ensure the strength and stability of the structure. The upper head 13 is detachably connected to the upper end of the cylinder wall 11 to facilitate filling of materials and inspection, maintenance and replacement of the internal structure, thereby saving maintenance costs.

[0038] It can be understood that the lower ends of the outer filter cartridge 3 and the inner filter cartridge 2 are welded and fixed to the lower head 12 to ensure the stability of the structure. The upper head 13 and the lower head 12 are hemispherical, so that a buffer cavity is formed between the upper head 13 and the cover plate 4, and the material can be temporarily stored in the buffer cavity.

[0039] Reference Figure 1 As shown, in some embodiments of the present invention, the lower head 12 is provided with an inlet 121 connected to the inner filter cartridge 2, the upper head 13 is provided with an outlet 131 connected to the cache chamber, a first flow channel is formed between the inner filter cartridge 2 and the outer filter cartridge 3, a second flow channel is formed between the outer filter cartridge 3 and the cylinder wall 11, a flow gap exists between the cover plate 4 and the cylinder wall 11, and the second flow channel is connected to the cache chamber through the flow gap.

[0040] It is understood that an inlet 121 is provided in the middle of the lower end cap 12, and the inlet 121 is connected to the inner filter cartridge 2. The material enters the inner cavity of the inner filter cartridge 2 from the inlet 121, and after being filtered through the filter holes of the inner filter cartridge 2, enters the first flow passage formed between the outer filter cartridge 3 and the inner filter cartridge 2, and then passes through the filtration of the outer filter cartridge 3, enters the second flow passage between the outer filter cartridge 3 and the cylinder wall 11, flows through the flow gap between the cover plate 4 and the cylinder wall 11, and enters the buffer cavity. The buffer cavity is connected to the outlet 131, so that the filtered material is discharged from the outlet 131. It is understood that the material can be waste gas or waste liquid.

[0041] In some embodiments of the present invention, the lower head 12 is provided with a discharge port 122 , and the discharge port 122 is communicated with the first flow passage.

[0042] Specifically, the residue generated after filtering is discharged from the discharge port 122, and the discharge port 122 is arranged on the lower head 12 and communicated with the first flow channel.

[0043] Reference Figure 7 As shown, in some embodiments of the present invention, the cover plate 4 is provided with a plurality of first inspection holes 42 connected to the inner filter cartridge 2, and the first inspection holes 42 are covered with a first flange cover 44; the cover plate 4 is provided with a plurality of second inspection holes 43 connected to the outer filter cartridge 3, and the second inspection holes 43 are covered with a second flange cover 45.

[0044] Specifically, the cover plate 4 is provided with a first inspection hole 42 connected to the inner filter cartridge 2, and a second inspection hole 43 connected to the outer filter cartridge 3. A first flange cover 44 is provided on the first inspection hole 42, and a second flange cover 45 is provided on the second inspection hole 43. When the novel filter cartridge structure is in operation, the first flange cover 44 and the second flange cover 45 are fixedly mounted on the cover plate 4. When maintenance is required, the first flange cover 44 and the second flange cover 45 are opened. The provision of the first inspection hole 42 and the second inspection hole 43 provides convenience for maintenance.

[0045] It can be understood that the first flange cover 44, the second flange cover 45 and the cover plate 4 are all detachably connected. Specifically, in some embodiments of the present invention, the first flange cover 44 and the second flange cover 45 are fixedly mounted on the cover plate 4 by fasteners. The connection method can also be a detachable connection method such as a snap connection.

[0046] Reference Figure 7 As shown, in some embodiments of the present invention, a plurality of limit members 41 are provided on the outer periphery of the cover plate 4, and the plurality of limit members 41 are evenly spaced along the circumference of the cover plate 4. The limit members 41 are detachably connected to the cylinder wall 11, and two adjacent limit members 41, the cylinder wall 11, and the cover plate 4 enclose a flow gap.

[0047] Specifically, a plurality of limit members 41 are arranged on the outer periphery of the cover plate 4, one end of the limit member 41 is detachably connected to the cover plate 4, and the other end is welded and fixed to the cylinder wall 11 after installation. The arrangement of the limit member 41 avoids the shaking of the cover plate 4. Since the inner filter cartridge 2 and the outer filter cartridge 3 are arranged vertically, when the heights of the inner filter cartridge 2 and the outer filter cartridge 3 are relatively high, under the action of external force, if the upper ends of the inner filter cartridge 2 and the outer filter cartridge 3 are not limited, shaking will occur, thereby affecting the stability of the structure. The limit member 41 is fixedly connected to the cylinder wall 11, thereby limiting the inner filter cartridge 2 and the outer filter cartridge 3, thereby ensuring the stability of the structure.

[0048] Reference Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the first filter cartridge unit 21 includes a first straight edge segment 211, a first filter hole segment 212 and a second straight edge segment 213 connected in sequence, the first straight edge segment 211 is provided with a first positioning ring plate, the second straight edge segment 213 is provided with a second positioning ring plate, and two adjacent first filter cartridge units 21 are detachably connected via a first fastener 22, and the first fastener 22 is arranged around the first positioning ring plate of one first filter cartridge unit 21 and the second positioning ring plate of another first filter cartridge unit 21.

[0049] Specifically, during installation, the lower surface of the second straight edge segment 213 of the first filter cartridge unit 21 located at the bottom is directly welded and fixed to the lower head 12, and the upper surface of the first straight edge segment 211 of the first filter cartridge unit 21 located at the top is detachably connected to the cover plate 4, and two adjacent first filter cartridge units 21 are detachably connected via a second fastener.

[0050] In some embodiments of the present invention, the first fastener 22 is a clamp, there are multiple clamps, and the clamps are semicircular or arc-shaped.

[0051] It is understandable that when the clamp is semicircular, only two clamps are needed to connect two adjacent second filter cartridge units 31, and when the clamp is arc-shaped, multiple clamps are needed to connect two adjacent second filter cartridge units 31, which is specifically determined according to the arc of the clamp.

[0052] Reference Figure 5 and Figure 6As shown, in some embodiments of the present invention, the second filter cartridge unit 31 includes a third straight edge segment 311, a second filter hole segment 312 and a fourth straight edge segment 313 connected in sequence, the third straight edge segment 311 is provided with an upper ring plate 314, the fourth straight edge segment 313 is provided with a lower ring plate 315, the upper ring plate 314 is provided with a plurality of first connecting holes evenly spaced apart, the lower ring plate 315 is provided with a plurality of second connecting holes evenly spaced apart, the plurality of first connecting holes and the plurality of second connecting holes are arranged one by one correspondingly, two adjacent second filter cartridge units 31 are detachably connected by a second fastener, the second fastener is passed through the first connecting hole of one second filter cartridge unit 31 and the second connecting hole of another second filter cartridge unit 31 to connect the two adjacent second filter cartridge units 31.

[0053] Specifically, during installation, the lower end of the second filter cartridge unit 31 located at the bottom is directly welded and fixed to the lower head 12, and the two adjacent second filter cartridge units 31 are fixed by a second fastener. The second fastener is passed through the first connecting hole of a first filter cartridge unit 21 and the second connecting hole of another first filter cartridge unit 21 to fix the two adjacent second filter cartridge units 31 in connection. A first connecting ring plate is connected to the upper end face of the second filter cartridge unit 31 at the top, and the first connecting ring plate is detachably connected to the cover plate 4.

[0054] It can be understood that the first fastener 22 is a fastening bolt.

[0055] In some embodiments of the present invention, a first rib 316 is provided between the lower surface of the upper ring plate 314 and the third straight edge segment 311, and a plurality of the first ribs 316 are provided and are evenly spaced. A second rib 317 is provided between the upper surface of the lower ring plate 315 and the fourth straight edge segment 313, and a plurality of the second ribs 317 are provided and are evenly spaced.

[0056] Specifically, the arrangement of the first rib plate 316 and the second rib plate 317 improves the structural strength. Specifically, two first rib plates 316 are arranged on both sides of each first connection hole, and two second rib plates 317 are arranged on both sides of each second connection hole. Excessive stress at the first connection hole and the second connection hole is avoided, which causes structural deformation.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A new filter cartridge structure, characterized in that: include: A cylinder (1) having a cavity therein; An inner filter cartridge (2) is arranged in the cavity, the lower end of the inner filter cartridge (2) is fixedly welded to the bottom of the cylinder body (1), and the inner filter cartridge (2) comprises a plurality of detachably connected first filter cartridge units (21), wherein the plurality of first filter cartridge units (21) are connected in sequence along a vertical direction; An outer filter cartridge (3) is arranged in the cavity and sleeved outside the inner filter cartridge (2), the lower end of the outer filter cartridge (3) is fixedly welded to the bottom of the cylinder body (1), and the outer filter cartridge (3) comprises a plurality of detachably connected second filter cartridge units (31), wherein the plurality of second filter cartridge units (31) are connected in sequence along the vertical direction; A cover plate (4) is arranged in the cavity and fixedly connected to the inner wall of the cylinder (1); the cover plate (4) is detachably arranged to cover the upper ends of the inner filter cartridge (2) and the outer filter cartridge (3).

2. The novel filter cartridge structure according to claim 1 is characterized in that: The cylinder body (1) comprises a cylinder wall (11) and an upper head (13) and a lower head (12) respectively arranged at the upper and lower ends of the cylinder wall (11); the upper head (13) is detachably connected to the upper end surface of the cylinder wall (11); the lower head (12) is fixedly welded to the lower end surface of the cylinder wall (11); the bottoms of the inner filter cartridge (2) and the outer filter cartridge (3) are fixedly welded to the lower head (12); and a buffer cavity is formed between the upper head (13) and the cover plate (4).

3. The novel filter cartridge structure according to claim 2 is characterized in that: The lower head (12) is provided with an inlet (121) connected to the inner filter cartridge (2), and the upper head (13) is provided with an outlet (131) connected to the cache chamber. A first flow channel is formed between the inner filter cartridge (2) and the outer filter cartridge (3), and a second flow channel is formed between the outer filter cartridge (3) and the cylinder wall (11). A flow gap exists between the cover plate (4) and the cylinder wall (11), and the second flow channel is connected to the cache chamber through the flow gap.

4. The novel filter cartridge structure according to claim 3 is characterized in that: The lower sealing head (12) is provided with a discharge port (122), and the discharge port (122) is communicated with the first flow passage.

5. The novel filter cartridge structure according to claim 4 is characterized in that: The cover plate (4) is provided with a plurality of first inspection holes (42) in communication with the inner filter cartridge (2), and the first inspection holes (42) are covered with a first flange cover (44); the cover plate (4) is provided with a plurality of second inspection holes (43) in communication with the outer filter cartridge (3), and the second inspection holes (43) are covered with a second flange cover (45).

6. The novel filter cartridge structure according to claim 5 is characterized in that: A plurality of limiting members (41) are provided on the outer circumference of the cover plate (4), and the plurality of limiting members (41) are evenly spaced along the circumference of the cover plate (4). The limiting members (41) are fixedly connected to the cylinder wall (11), and two adjacent limiting members (41), the cylinder wall (11) and the cover plate (4) enclose the flow gap.

7. The novel filter cartridge structure according to claim 1 is characterized in that: The first filter cartridge unit (21) comprises a first straight edge section (211), a first filter hole section (212) and a second straight edge section (213) which are connected in sequence; the first straight edge section (211) is provided with a first positioning ring plate; the second straight edge section (213) is provided with a second positioning ring plate; two adjacent first filter cartridge units (21) are detachably connected via a first fastener (22); the first fastener (22) is arranged around the first positioning ring plate of one first filter cartridge unit (21) and the second positioning ring plate of another first filter cartridge unit (21).

8. The novel filter cartridge structure according to claim 7 is characterized in that: The first fastener (22) is a clamp, there are multiple clamps, and the clamps are semicircular or arc-shaped.

9. The novel filter cartridge structure according to claim 1 is characterized in that: The second filter cartridge unit (31) comprises a third straight edge section (311), a second filter hole section (312) and a fourth straight edge section (313) which are connected in sequence; the third straight edge section (311) is provided with an upper ring plate (314); the fourth straight edge section (313) is provided with a lower ring plate (315); a plurality of first connection holes are evenly spaced apart on the upper ring plate (314); a plurality of second connection holes are evenly spaced apart on the lower ring plate (315); the plurality of first connection holes and the plurality of second connection holes are arranged in a one-to-one correspondence; two adjacent second filter cartridge units (31) are detachably connected via a second fastener; the second fastener is passed through a first connection hole of one second filter cartridge unit (31) and a second connection hole of another second filter cartridge unit (31) to connect the two adjacent second filter cartridge units (31).

10. The novel filter cartridge structure according to claim 9 is characterized in that: A first rib plate (316) is provided between the lower surface of the upper ring plate (314) and the third straight edge segment (311), and a plurality of the first rib plates (316) are provided and are evenly spaced. A second rib plate (317) is provided between the upper surface of the lower ring plate (315) and the fourth straight edge segment (313), and a plurality of the second rib plates (317) are provided and are evenly spaced.

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