Deep filtering assembly

Abstract

A deep filtering assembly comprises a center pipe, a separation ring and deep filtering units, each deep filtering unit comprises a flow guide part, deep filtering media arranged on the two sides of the flow guide part and outer sealing wrapping edges wrapping the peripheral sides of the deep filtering media, and the deep filtering assembly is characterized in that each deep filtering medium comprises an inner-layer filtering paper board and an outer-layer filtering paper board; the diameter of the second through hole in the center of the outer-layer filtering paperboard is larger than that of the first through hole in the center of the inner-layer filtering paperboard, an annular sealing boss protrudes out of the end face of the end, facing the deep-layer filtering unit, of the separation ring, and the annular sealing boss penetrates through the second through hole and then is in pressing sealing with the inner-layer filtering paperboard. The filter has the advantages that a seal is additionally arranged between the inner peripheral side of the outer-layer filter paper board and the central pipe, in the filtering process, even if fluid directly flows out of the inner peripheral side of the outer-layer filter paper board, effective blocking seal can be formed, the problem that the fluid bypasses the inner-layer filter paper board and directly flows to the central rod is avoided, and therefore reliable seal is guaranteed, and the service life of the filter is prolonged. The product performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a deep filtration component. Background Art

[0002] The deep filtration structure is a disc-type structure. Due to its stackable function, it can meet different filtration requirements, so it is widely used in the food and beverage, semiconductor and biopharmaceutical industries.

[0003] For example, a combined load-type deep filter mechanism disclosed in a Chinese utility model patent (CN217188220U) includes a housing and a center rod installed in the housing, as well as a combined filter structure. The combined filter structure includes a plurality of filter elements and a separation ring that serves to separate and seal the filter elements.

[0004] The filter element includes an outer filter layer and an inner filter layer arranged from the outside to the inside, a supporting partition plate installed between the inner filter layer and the inner filter layer, and a fixing sleeve installed on the outside of the outer filter layer and the inner filter layer for fixing the outer filter layer and the inner filter layer; a liquid outlet channel is formed between the inner filter layer and the inner filter layer; a plurality of through holes connected to the liquid outlet channel are provided on the center rod, and a liquid outlet hole connected to the through holes is provided on the center rod.

[0005] When using filtration, the filter medium enters the shell through the medium inlet. The filter medium entering the shell first passes through the outer filter layer for coarse filtration, and then passes through the inner filter layer for fine filtration after being filtered by the outer filter layer. The filter medium after being filtered by the inner filter layer enters the liquid outlet channel, and then the filter medium in the liquid outlet channel enters the liquid outlet hole in the center rod through the through hole and is discharged.

[0006] However, in actual application, it is found that the above-mentioned combined load-type deep filter mechanism has the following deficiencies:

[0007] 1. The outer and inner filter layers of the deep filter element are both made of deep filter paper. Deep filter paper is a filter medium of a certain thickness, similar in structure to a three-dimensional filter screen. Microorganisms and solid particles are trapped within the maze-like pores within the deep filter paper. Therefore, deep filter paper differs from conventional membrane filter media in that fluid flows not only along its thickness but also along its radial direction.

[0008] In existing deep-layer filtration mechanisms, sealing the inner circumference of the deep-layer filter paperboard is often limited to a single axial compression seal. The deep-layer filter paperboard becomes denser under the compression of the separator ring and supporting separator plate, achieving a sealing effect. Although the two end surfaces of the deep-layer filter paperboard are compressed to form a reliable seal, this sealing is primarily concentrated between the deep-layer filter paperboard and the separator ring and supporting separator plate. The deep-layer filter paperboard itself may still have some loose areas, through which fluid can pass. Therefore, during the filtration process, a small amount of fluid will still flow directly from the inner side of the outer filter layer to the center rod. This fluid only undergoes coarse filtration in the outer filter layer, but not fine filtration in the inner filter layer, thus affecting the filtration effect.

[0009] 2. During the filtration process, the outer filter layer and the inner filter layer will be fully moistened and gradually softened. The outer filter layer and the inner filter layer will gradually fit together, the resistance pressure will increase, and the liquid flux will be significantly reduced. This will also reduce the service life and filtration capacity of the deep filter. Utility Model Content

[0010] In order to overcome the shortcomings of the background technology, the utility model provides a deep filter assembly.

[0011] The technical solution adopted by the present invention is a deep filter assembly, comprising a central tube, a plurality of separation rings and a plurality of groups of deep filter units, wherein the separation rings and the deep filter units are alternately sleeved on the central tube; wherein each group of deep filter units comprises:

[0012] A flow guide member, wherein a center hole adapted to the center tube is provided at the center of the flow guide member, and the flow guide member is provided with a flow guide channel communicating with the center hole;

[0013] Two sets of deep filter media are respectively arranged on both sides of the flow guide;

[0014] An outer sealing edge, which is coated on the outer peripheral sides of the two groups of deep filter media and is used for common sealing of the outer peripheral sides of the two groups of deep filter media;

[0015] The depth filter medium comprises:

[0016] The inner filter paperboard has a first through hole at its center;

[0017] An outer filter paperboard is arranged outside the inner filter paperboard, wherein a second through hole is provided at the center of the outer filter paperboard, and a diameter of the second through hole is larger than a diameter of the first through hole;

[0018] The separation ring is tightly sealed with the outer filter paperboard. An annular sealing boss is protruding from the end surface of the separation ring facing the deep filter unit. The annular sealing boss passes through the second through hole and is tightly sealed with the inner filter paperboard.

[0019] A first annular pressing rib is formed on an end surface of the separation ring that cooperates with the outer filter paperboard.

[0020] A second annular pressing rib is formed on the end surface of the annular sealing boss.

[0021] A support plate is further provided between the inner filter paperboard and the outer filter paperboard, and a flow channel is formed on the support plate between the inner filter paperboard and the outer filter paperboard.

[0022] A third through hole is formed in the center of the support plate. The diameter of the third through hole matches the diameter of the annular sealing boss, and the support plate is positioned and matched with the center of the annular sealing boss through the third through hole.

[0023] The upper and lower end surfaces of the support plate close to the inner circumference are both formed with third annular pressing ribs.

[0024] The filtering accuracy of the inner filter paperboard is higher than that of the outer filter paperboard.

[0025] The beneficial effects of the present invention are as follows: an annular sealing boss is protruded on the end surface of the separation ring facing the deep filter unit, and the annular sealing boss can be pressed and sealed with the inner filter paperboard after passing through the second through hole of the outer filter paperboard, which is equivalent to adding an additional sealing structure between the inner circumference of the outer filter paperboard and the central tube. Moreover, during the filtration process, even if fluid flows directly out of the inner circumference of the outer filter layer, an effective blocking seal can be formed to avoid the problem of the fluid bypassing the inner filter paperboard and flowing directly to the central rod, thereby ensuring reliable sealing and improving product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a deep filter assembly according to an embodiment of the present utility model.

[0027] Figure 2 This is a schematic structural diagram of a deep filtration unit according to an embodiment of the present utility model.

[0028] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle. DETAILED DESCRIPTION

[0029] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] As shown in the figure, a deep filtration assembly includes a central tube 1 , a plurality of separation rings 2 and a plurality of groups of deep filtration units 3 .

[0031] The central tube 1 generally comprises a tube body and end caps disposed at both ends of the tube body. The tube body is a hollow tube with a plurality of flow holes formed in the side wall of the tube body. One end cap is sealed, while the other end cap is open to form a liquid outlet. At least one of the end caps is separate from the tube body and can be locked together. Specifically, the locking connection can be in the form of a snap.

[0032] Each group of deep filter units 3 includes a flow guide 4 , two groups of deep filter media 5 , and an outer sealing edge 6 .

[0033] A central hole 41 adapted to the tube body of the central tube 1 is provided at the center of the flow guide 4, and the flow guide 4 is provided with a flow guide channel 42 connected to the central hole 41. Two groups of deep filter media 5 are respectively arranged on both sides of the flow guide 4, and the outer sealing edge 6 is covered on the outer peripheral sides of the two groups of deep filter media 5 for common sealing of the outer peripheral sides of the two groups of deep filter media 5.

[0034] The deep filter medium 5 comprises an inner filter paperboard 51, a support plate 53, and an outer filter paperboard 52, stacked sequentially from the inside out. The support plate 53 also defines a flow channel 531 between the inner filter paperboard 51 and the outer filter paperboard 52. The support plate 53 provides support and positioning, maintaining a gap between the inner filter paperboard 51 and the outer filter paperboard 52, thereby reducing resistance pressure, increasing fluid throughput, and improving the service life and filtration capacity of the deep filter unit. The support plate is specifically composed of several connecting rings of different diameters, each concentrically arranged and connected by a plurality of connecting strips. Spatial channels, i.e., the flow channels, are formed between the connecting rings and the connecting strips.

[0035] The separator ring 2 and the depth filter unit 3 are alternately mounted on the central tube 1 in sequence. When the end caps of the central tube 1 are locked with the tube body, the upper and lower end caps of the central tube 1 can exert mutual axial compression on the separator ring 2 and the depth filter unit 3, that is, the separator ring 2, the outer filter paperboard 52, the support plate 53, and the inner filter paperboard 51 can be pressed against each other to form a seal.

[0036] A first through hole 511 is defined at the center of the inner filter paperboard 51, a second through hole 521 is defined at the center of the outer filter paperboard 52, and a third through hole 532 is defined at the center of the support plate 53. The diameter of the first through hole 511 matches the diameter of the central tube 1, while the diameters of the second through hole 521 and the third through hole 532 are the same, and the diameter of the second through hole 521 is greater than that of the first through hole 511.

[0037] An annular sealing boss 21 protrudes from the end surface of the separator ring 2 facing the depth filter unit 3. The diameter of the boss 21 matches the second and third through-holes 521, 532. After passing through the second and third through-holes 521, 532, the boss 21 forms a tight seal with the inner filter paperboard 51. In other words, under the axial compression of the upper and lower end caps of the center tube 1, an additional annular sealing boss forms a tight seal between the inner circumference of the outer filter paperboard and the center tube. Therefore, during the filtration process, even if fluid flows directly from the inner circumference of the outer filter layer, an effective seal is formed, preventing the fluid from bypassing the inner filter paperboard and flowing directly to the center rod. This ensures a reliable seal and improves product performance. Furthermore, the boss 21 forms a centrally positioned fit with the support plate 53, ensuring good concentricity and a stable and reliable overall structure.

[0038] It should be noted here that the separating ring arranged between two adjacent groups of deep filtration units has annular sealing bosses formed at both ends. In addition, separating rings are also provided at both ends of the deep filtration assembly, that is, a separating ring is provided between the deep filtration unit and the end cover of the central tube, and the separating ring may only have an annular sealing boss formed on one end facing the deep filtration unit, and the other end may be sealed with the end cover of the central tube or directly formed integrally with the end cover.

[0039] In addition, a first annular pressing rib 22 is formed on the end surface of the separating ring 2 that cooperates with the outer filter paperboard 52, a second annular pressing rib 23 is formed on the end surface of the annular sealing boss 21, and third annular pressing ribs 533 are formed on the upper and lower end surfaces of the support plate 53 close to the inner circumference. The annular pressing ribs can make the pressure more concentrated, thereby further increasing the extrusion effect and further improving the sealing performance.

[0040] In addition, the filtering precision of the inner filter paperboard 51 and the outer filter paperboard 52 are different. In this embodiment, the filtering precision of the inner filter paperboard 51 is higher than that of the outer filter paperboard 52 .

[0041] When the above-mentioned deep filter assembly is in use, it is installed in the shell, and the liquid outlet of the central tube is connected to the outlet of the shell. The fluid can enter the shell through the inlet of the shell, and then pass through the outer filter paperboard from the outside to the inside for coarse filtration, and then pass through the inner filter paperboard for fine filtration. The filtered fluid then passes through the guide channel, the flow hole, and the liquid outlet in sequence and is discharged from the outlet of the shell.

[0042] The beneficial effects of the above-mentioned deep filter assembly are:

[0043] 1. An annular sealing boss protrudes from the end surface of the separation ring facing the depth filter unit. After passing through the second through-hole of the outer filter paperboard, the annular sealing boss can be pressed and sealed against the inner filter paperboard. This is equivalent to adding an additional sealing structure between the inner circumference of the outer filter paperboard and the central tube. Moreover, during the filtration process, even if fluid flows directly out of the inner circumference of the outer filter layer, it can form an effective blocking seal, preventing the fluid from bypassing the inner filter paperboard and flowing directly to the central rod, thereby ensuring reliable sealing and improving product performance.

[0044] 2. An additional support plate structure is added. The support plate can play a supporting and positioning role, so that a gap is maintained between the inner filter paperboard and the outer filter paperboard, thereby reducing the resistance pressure, increasing the fluid flux, and at the same time improving the service life and filtering capacity of the deep filter unit.

[0045] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified or 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0047] Technical personnel please note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent.

Claims

1. A deep filter assembly, comprising a central tube (1), a plurality of separation rings (2), and a plurality of groups of deep filter units (3), wherein the separation rings (2) and the deep filter units (3) are sequentially and alternately sleeved on the central tube (1); wherein: Each deep filter unit (3) comprises: A flow guide member (4), the center of which is provided with a center hole (41) adapted to the center tube (1), and the flow guide member (4) is provided with a flow guide channel (42) communicating with the center hole (41); Two groups of deep filter media (5), which are respectively arranged on both sides of the flow guide (4); An outer sealing edge (6) is coated on the outer peripheral sides of the two groups of deep filter media (5) and is used for common sealing of the outer peripheral sides of the two groups of deep filter media (5); Characterized in that: the deep filter medium (5) comprises: An inner filter paperboard (51) having a first through hole (511) at its center; An outer filter paperboard (52) is arranged outside the inner filter paperboard (51), a second through hole (521) is provided at the center of the outer filter paperboard (52), and the diameter of the second through hole (521) is larger than the diameter of the first through hole (511); The separation ring (2) is pressed and sealed with the outer filter paperboard (52), and an annular sealing boss (21) is protruded from the end surface of the separation ring (2) facing the deep filter unit (3). The annular sealing boss (21) passes through the second through hole (521) and is pressed and sealed with the inner filter paperboard (51).

2. The deep filter assembly according to claim 1, characterized in that: A first annular pressing rib (22) is formed on an end surface of the separation ring (2) that cooperates with the outer filter paperboard (52).

3. The deep filter assembly according to claim 1, characterized in that: A second annular pressing rib (23) is formed on the end surface of the annular sealing boss (21).

4. The deep filter assembly according to claim 1, characterized in that: A support plate (53) is further provided between the inner filter paperboard (51) and the outer filter paperboard (52), and the support plate (53) further forms a flow channel (531) between the inner filter paperboard (51) and the outer filter paperboard (52).

5. The deep filter assembly according to claim 4, characterized in that: A third through hole (532) is formed at the center of the support plate (53), the diameter of the third through hole (532) is adapted to the diameter of the annular sealing boss (21), and the support plate (53) is positioned and matched with the center of the annular sealing boss (21) through the third through hole (532).

6. The deep filter assembly according to claim 4, characterized in that: The upper and lower end surfaces of the support plate (53) close to the inner circumference are both formed with third annular pressing ribs (533).

7. The depth filter assembly according to claim 1, characterized in that: The filtering accuracy of the inner filter paperboard (51) is higher than that of the outer filter paperboard (52).

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