Multi-core filter

Abstract

A multi-element filter comprises a shell, a pattern plate, a plurality of first filter elements, a pressing plate and at least one second filter element, a plurality of evenly-distributed connecting holes are formed in the pattern plate, and the connecting holes comprise at least one threaded hole and a plurality of inserting holes; the first filter element is hermetically inserted into the insertion hole; the pressing plate is located above the first filter element, the second filter element penetrates through the through hole of the pressing plate from top to bottom, the lower end of the second filter element is in threaded connection with the threaded hole, and when the second filter element is locked, the pressing plate can be forced to downwards press the first filter element. Compared with the prior art, parts such as a pull rod and a locking piece are omitted, the cost is reduced, and disassembly and assembly operation is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a multi-core filter. Background Technology

[0002] Filters, as liquid separation devices used to control impurities in industrial processes, are widely used in industries such as pharmaceuticals, food, semiconductors, and beverages. Generally, filters are installed in fluid pipelines; after the fluid passes through the filter, impurities are trapped by the filter element inside, resulting in clean fluid flowing out.

[0003] As customers' production scale continues to expand, the size of filters is also constantly increasing and being upgraded, and the number of filter elements also increases accordingly. For example, a corrosion-resistant filter disclosed in utility model patent CN 221155622 U includes a shell, a perforated plate, a pressure plate, a sealing assembly, and several filter elements. The sealing assembly includes a pull rod and a locking element. The locking element locks with the pull rod to force the pressure plate to press the filter elements tightly, thereby ensuring stable installation of the filter elements.

[0004] The lower end of the pull rod connects to the perforated plate, while the upper end needs to pass through the pressure plate. Therefore, the pull rod is relatively long. To ensure sufficient installation space for the filter element, the diameter of the pull plate is very small, resulting in a thin and long pull plate. Consequently, the pull rod itself is prone to slight angular misalignment when not in conjunction with the pressure plate. Furthermore, to ensure overall strength and even stress distribution, multiple pull rods are required, arranged in multiple rings around the center of the perforated plate. Combined with the obstruction of view by the pressure plate itself, it becomes difficult to accurately align the pressure plate with the pull rod during installation, leading to installation difficulties. Moreover, the locking component is usually a nut, which is not very convenient to tighten. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a multi-core filter.

[0006] The technical solution adopted in this utility model is as follows: A multi-core filter, comprising:

[0007] The shell has a cavity formed inside it;

[0008] The flower plate is set inside the shell and divides the cavity of the shell into an upper chamber and a lower chamber. The flower plate has a number of evenly arranged connecting holes, including at least one threaded hole and a number of plug holes.

[0009] Several first filter elements are mounted on the tube sheet and sealed to the insertion holes;

[0010] A pressure plate is disposed inside the housing and located above the first filter element, and the pressure plate has at least one through hole that can be aligned with the threaded hole;

[0011] At least one second filter element is provided, which is disposed through the through hole from top to bottom, and its lower end is threadedly connected to the threaded hole, while its upper end is limited and matched with the pressure plate, which can force the pressure plate to press the first filter element downward.

[0012] The first filter element and the second filter element have the same configuration, that is, the first filter element and the second filter element are filter elements with the same structure and the same filtration accuracy.

[0013] Both the first filter element and the second filter element include:

[0014] Filter section;

[0015] The upper cover is located at the upper end of the filter section;

[0016] The lower end cover is disposed at the lower end of the filter section. A flow guide hole communicating with the hollow filter section is formed in the center of the lower end cover. A first connecting ring protruding downward is formed on the lower end face of the lower end cover. A second connecting ring with an external thread structure is formed at the lower end of the first connecting ring.

[0017] The first filter element can be sealed and inserted into the insertion hole of the tube sheet through the first connecting ring, while the second filter element can be threadedly connected to the threaded hole of the tube sheet through the second connecting ring.

[0018] Preferably, a limiting boss is formed at the middle of the outer side wall of the upper end cover; the number of through holes on the pressure plate is consistent with the number of connecting holes on the flower plate, and the through holes correspond one-to-one with the connecting holes; the through holes are adapted to the upper end cover, and the first filter element and the second filter element are both positioned and engaged through the center of the through holes of the upper end cover and the pressure plate, and the first filter element and the second filter element are both axially limited and engaged with the pressure plate through the limiting boss. This arrangement is more conducive to mutual positioning, more conducive to installation and operation, and can ensure structural stability and reliability.

[0019] Preferably, each of the upper end caps is provided with a handle, which makes it easier to install and remove the filter element inside the filter housing.

[0020] Preferably, at least one sealing ring is formed on the outside of the first connecting ring. When the first filter element is connected to the tube sheet, the sealing ring can ensure a reliable seal between the first connecting ring and the tube sheet insertion hole.

[0021] Preferably, the outer diameter of the first connecting ring is slightly larger than the outer diameter of the second connecting ring, and the whole is convex in shape; a positioning groove is formed at the upper end of the threaded hole, and the first connecting ring is inserted into the positioning groove and sealed with it. When the second filter element is connected to the tube sheet, in addition to forming a seal through the threaded connection between the second connecting ring and the threaded hole, its first connecting ring can also form a seal with the positioning groove, further ensuring a reliable seal.

[0022] Preferably, the number of threaded holes does not exceed 1 / 4 of the number of connecting holes. The threaded holes are located at the center of the tube sheet or evenly distributed along the center of the tube sheet. For example, the tube sheet may have one threaded hole and six insertion holes, with the threaded hole located at the center of the tube sheet and the insertion holes evenly distributed circumferentially along the center of the tube sheet. This arrangement allows for overall fixation with fewer filter elements, making disassembly and assembly easier while ensuring reliable installation.

[0023] The installation process for the filter cartridges of the above multi-element filter is as follows:

[0024] First, install the first filter element by inserting it into the housing and connecting it to the insertion hole of the tube sheet. Then, install the pressure plate by aligning the through hole on the pressure plate with the first filter element and fitting it onto the upper end cap of each first filter element. Finally, install the second filter element by passing it through the remaining through hole on the pressure plate and threading it onto the threaded hole of the tube sheet. When the second filter element is locked, it can press the pressure plate, and at the same time, the pressure plate presses the first filter element.

[0025] The beneficial effects of this utility model are as follows: by adopting the above scheme, the second filter element connected by threads is used to press the pressure plate, and the pressure plate presses the first filter element connected by insertion, thereby forming a stable and reliable installation structure for each filter element. Compared with the prior art, it not only eliminates the need for parts such as pull rods and locking parts, reducing costs, but also makes disassembly and assembly operations more convenient. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the multi-core filter according to an embodiment of the present invention.

[0027] Figure 2 This is an exploded structural diagram of the perforated plate, filter element, and pressure plate in an embodiment of this utility model.

[0028] Figure 3 This is a schematic diagram of the filter element in an embodiment of the present invention.

[0029] Figure 4 for Figure 1 An enlarged schematic diagram of point A in the diagram.

[0030] Figure 5 This is a schematic diagram of the structure of the flower plate in an embodiment of this utility model.

[0031] Figure 6 This is a schematic diagram of the structure of the pressure plate in an embodiment of the present utility model. Detailed Implementation

[0032] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0033] like Figures 1-6As shown, a multi-core filter includes a housing 1, a perforated plate 2, a filter element, and a pressure plate 4.

[0034] The housing 1 includes a base, a cylindrical body, and a top cover. The base has a liquid outlet at its center and an arc-shaped bottom with a smooth, corner-free inner wall, facilitating filtrate discharge without residue. The cylindrical body is fixedly mounted on the base and is a hollow cylindrical structure with openings at both its top and bottom. A liquid inlet is formed on the side wall of the cylindrical body. The top cover is detachably mounted on the top of the cylindrical body, allowing for easy disassembly and assembly of the filter element inside the housing 1.

[0035] The perforated plate 2 is fixedly welded to the base of the housing 1, thereby dividing the internal cavity of the housing 1 into an upper chamber 11 and a lower chamber 12. The perforated plate 2 also has several evenly arranged connecting holes. In this embodiment, there are specifically seven connecting holes, including one threaded hole 21 and six insertion holes 22. The threaded hole 21 is located at the center of the perforated plate 2, and the six insertion holes 22 are evenly arranged around the center of the perforated plate 2. The diameter of the threaded hole 21 is slightly smaller than the diameter of the insertion holes 22. A positioning groove 23 is formed at the upper end of the threaded hole 21, and the diameter of the positioning groove 23 is the same as the diameter of the insertion hole 22.

[0036] The filter element includes a filter section 31 and an upper end cap 32 and a lower end cap 34 disposed at the upper and lower ends of the filter section 31. Specifically, the filter element may be a microporous membrane pleated filter element. The filter section 31 typically includes a porous central rod and a shell, as well as a microporous filter membrane located between the central rod and the shell. The microporous filter membrane is folded into pleats and arranged around the central rod.

[0037] The upper end cover 32 has a certain thickness, and a limiting protrusion 33 is formed at the middle of the outer side wall of the upper end cover 32. A handle 38 is provided at the upper end of the upper end cover 32, which allows for easy gripping of the filter element, facilitating the installation and removal of the filter element inside the filter housing. The length of the handle 38 is less than the diameter of the upper end cover 32.

[0038] The lower end cover 34 has a flow guide hole 35 at its center that communicates with the hollow filter section. The lower end face of the lower end cover 34 has a downward protruding first connecting ring 36. At least one sealing ring 6 is formed on the outside of the first connecting ring 36. In this embodiment, two sealing rings 6 are provided to ensure a reliable sealing effect. The lower end of the first connecting ring 36 also has a second connecting ring 37 with an external thread structure. Therefore, the filter element can be sealed and inserted into the insertion hole 22 of the tube sheet 2 through the first connecting ring 36, and can also be threadedly connected to the threaded hole 21 of the tube sheet 2 through the second connecting ring 37.

[0039] The outer diameter of the first connecting ring 36 is larger than that of the second connecting ring 37, and the whole is convex. When the second connecting ring 37 of the filter element is threadedly connected to the threaded hole 21, the first connecting ring 36 of the filter element will also be inserted into the positioning groove 23 and form a seal with the positioning groove 23, further ensuring a reliable seal.

[0040] For ease of explanation, the filter element that is sealed and plugged into the insertion hole 22 is defined as the first filter element 3, and the filter element that is threadedly connected to the threaded hole 21 is defined as the second filter element 5. In this embodiment, the first filter element 3 and the second filter element 5 are actually the same filter element, and their structure and precision configuration are exactly the same.

[0041] The pressure plate 4 has a plurality of through holes 41, the number of which corresponds to the number of connecting holes on the perforated plate 2, and each through hole 41 corresponds one-to-one with a connecting hole. Specifically, there are seven through holes 41, one of which is located at the center of the pressure plate 4, and the other six are evenly distributed around the center of the pressure plate 4. The size of each through hole 41 is adapted to the upper end cover 32 of the filter element, allowing the filter element to be centrally positioned and fitted with the through holes 41 of the pressure plate 4 via the upper end cover 32.

[0042] The installation process for the filter cartridges of the above multi-element filter is as follows:

[0043] First, install the first filter element 3, that is, put the six first filter elements 3 into the housing 1 in sequence and insert them into the six insertion holes 22 that are evenly distributed around the perimeter of the tube sheet 2;

[0044] Then install the pressure plate 4, aligning the 6 circumferentially distributed through holes 41 of the pressure plate 4 with the 6 first filter elements 3, and then fit the pressure plate 4 from top to bottom onto the upper end of each first filter element 3. The upper end cover of each first filter element 3 and each through hole 41 of the pressure plate 4 form a center positioning fit, and the upper end face of the pressure plate 4 and the limiting boss of the first filter element 3 are in a limiting fit.

[0045] Finally, install the second filter element 5 by passing it through the through hole 41 at the center of the pressure plate 4 and rotating it with the handle to thread it onto the threaded hole 21 of the tube sheet 2. As the second filter element 5 is being threaded, it will gradually move downwards, causing the first connecting ring of the lower end cap of the second filter element 5 to be embedded in the positioning groove 23 and the upper end cap of the second filter element 5 to be embedded into the through hole 41 at the center of the pressure plate 4. This achieves a reliable seal and center positioning of the second filter element 5 until the limiting boss of the second filter element 5 presses against the pressure plate 4, thus locking it in place. At the same time, the pressure plate 4 can press the first filter element 3.

[0046] During the installation of the pressure plate 4, the handle of the first filter element 3 can be used to quickly position each first filter element 3 and each through hole 41. Even if the position of the first filter element 3 is slightly tilted after it is installed on the tube sheet 2, the position of the first filter element 3 can be finely adjusted and corrected by the handle. With the chamfer or rounded corner designed on the through hole or the upper cover, quick docking can be achieved, and quick installation can be realized.

[0047] During the filtration process of the multi-core filter described above, the liquid first enters the upper chamber inside the housing through the inlet. Then, the liquid passes through the filtration section of the filter element from the outside to the inside in the radial direction to achieve filtration. The filtrate then enters the lower chamber through the guide hole at the lower end of the filter element and the connection hole of the perforated plate, and is finally discharged through the outlet.

[0048] The aforementioned multi-core filter utilizes a threaded connection of the second filter element to press against the pressure plate, which in turn forces the pressure plate to press against the first filter element that is plugged in, thereby forming a stable and reliable installation structure for each filter element. Compared with existing conventional multi-core filters, it eliminates components such as pull rods and locking parts, reduces the types and number of components, lowers costs, and makes the installation of the pressure plate more convenient and faster, optimizing the disassembly and assembly operations and improving the efficiency of filter element installation.

[0049] It should also be noted that the above multi-core filter is based on Figures 1-6 This is one of the embodiments given, but the inventive concept of this utility model is not limited to the above embodiments.

[0050] For example, in some other embodiments, the number of connecting holes on the tube sheet is not limited to 7; a greater number of connecting holes can be provided. Typically, among the numerous connecting holes, the number of threaded holes accounts for no more than 1 / 4 of the total number of connecting holes. Moreover, in addition to being located at the center of the tube sheet, the threaded holes can also be evenly distributed along the center of the tube sheet. This layout allows for overall fixation with as few filter elements as possible, making it easier to disassemble and assemble while ensuring reliable fixed installation.

[0051] In other embodiments, the first filter element and the second filter element may actually be filter elements with different configurations.

[0052] In the description of this utility model, it should also be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

Claims

1. A multi-core filter characterized by, The utility model relates to a multi-core filter, including: A shell (1) is internally formed with a containing cavity; A flower board (2) is arranged in the shell (1) and divides the containing cavity of the shell (1) into an upper chamber (11) and a lower chamber (12), a plurality of uniformly arranged connecting holes are formed on the flower board (2), and the plurality of connecting holes include at least one threaded hole (21) and a plurality of plug-in holes (22); A plurality of first filter elements (3) are installed on the flower board (2) and are sealingly plugged into the plug-in holes (22); A pressing plate (4) is arranged in the shell and is located above the first filter elements (3), a plurality of through holes (41) are formed on the pressing plate (4), and at least one of the through holes (41) can be aligned with the threaded hole (21); At least one second filter element (5) is arranged from top to bottom through the through holes (41) and is threadedly connected with the threaded hole (21) at the lower end, and the upper end is limitedly matched with the pressing plate (4) and can force the pressing plate (4) to press the first filter elements (3) downward.

2. The multi-core filter of claim 1, wherein The first filter elements (3) and the second filter elements (5) have the same configuration; The first filter elements (3) and the second filter elements (5) each include: A filter part (31); An upper end cover (32) is arranged at the upper end of the filter part (31); A lower end cover (34) is arranged at the lower end of the filter part (31), a flow guide hole (35) in communication with the hollow of the filter part is formed at the center of the lower end cover (34), a first connecting ring (36) protruding downward is formed at the lower end face of the lower end cover (34), and a second connecting ring (37) with an external thread structure is formed at the lower end of the first connecting ring (36); The first filter elements (3) are sealingly plugged into the plug-in holes (22) of the flower board (2) through the first connecting ring (36), and the second filter elements (5) are threadedly connected with the threaded hole (21) of the flower board (2) through the second connecting ring (37).

3. The multi-core filter according to claim 2, wherein A limiting boss (33) is formed at the middle position of the outer side wall of the upper end cover (32); The number of the through holes (41) on the pressing plate (4) is consistent with the number of the connecting holes on the flower board (2), and the through holes (41) correspond to the connecting holes one by one; The through holes (41) are matched with the upper end cover (32), the first filter elements (3) and the second filter elements (5) are centrally positioned and matched with the through holes (41) of the pressing plate (4) through the upper end cover (32), and the first filter elements (3) and the second filter elements (5) are axially limited and matched with the pressing plate (4) through the limiting boss (33).

4. The multi-core filter of claim 3, wherein, A handle (38) is arranged at the upper end of the upper end cover (32).

5. The multi-core filter of claim 2, wherein, At least one sealing ring (6) is formed on the outer side of the first connecting ring (36).

6. The multi-core filter of claim 2, wherein, The outer diameter of the first connecting ring (36) is larger than the outer diameter of the second connecting ring (37), and the first connecting ring (36) has a convex shape as a whole; A positioning groove (23) is formed at the upper end of the threaded hole (21), and the first connecting ring of the second filter element can be inserted into the positioning groove (23) and sealingly matched with the positioning groove (23).

7. The multi-core filter of claim 1, wherein The number of the threaded holes (21) accounts for no more than 1 / 4 of the number of the connecting holes.

8. The multi-core filter of claim 1, wherein, The threaded hole (21) is arranged at the center of the flower plate (2) or uniformly arranged along the center of the flower plate (2).

9. The multi-core filter of claim 1, wherein, The threaded hole (21) is arranged at the center of the flower plate (2) or uniformly arranged along the center of the flower plate (2).

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