CN220090704U - Filter element - Google Patents

Abstract

The utility model provides a filter element, which comprises a first supporting element, a second supporting element, a deep-layer filter medium clamped between the first supporting element and the second supporting element and a central channel positioned in the center, wherein the first supporting element is provided with a first pressing ring positioned at the periphery of the central channel and a first sealing ring positioned at the outer edge of the central channel; the periphery of the first sealing ring is provided with a clamping part and a capturing part, and the axially adjacent clamping parts and capturing parts form clamping connection so as to clamp the second supporting element and the deep filtration media on two sides of the second supporting element between the adjacent two first supporting elements. In the filter element, two adjacent first support elements form clamping connection at the periphery, and the generated mutual pulling acting force is transmitted to two first sealing rings inwards with the same size, so that the outer edges of the second sealing rings between the two first sealing rings and the deep filtration media at two sides of the second sealing rings form opposite extrusion action with the same size and high enough strength.

Description

Filter element

Technical Field

The utility model relates to the technical field of filtration, in particular to a filter element.

Background

US patent US8128824B2 discloses a filtration module comprising at least a raw material liquid discharge element, a filter medium layer, a filtrate discharge element, a filter medium layer and a raw material liquid discharge element which are axially stacked on each other, and the filtrate discharge element has connection means with the raw material liquid discharge elements at both axial ends thereof so that a compression seal is formed between the filter medium and the raw material liquid discharge element or filtrate discharge element with each other. The raw material liquid discharging element, the filter medium layer and the filtrate discharging element form central holes at the center, and after being axially stacked, the central holes are opposite to each other.

The periphery of the raw material liquid discharging element is provided with a raw material liquid inflow channel, the outer wall of the central hole of the filtrate discharging element is provided with a filtrate discharging channel, and the filtrate discharging channel is communicated with the central hole. During filtration, the raw material liquid flows into the raw material liquid inflow channel of the raw material liquid discharge element, then is dispersed on the surface of the filter medium layer, and after being filtered by the filter medium layer, the obtained filtrate is converged into the filtrate discharge channel of the filtrate discharge element, flows into the central hole and is discharged. Of course, the direction of flow of the fluid may be reversed.

In the filter module, the specific structure of the connecting device between the filtrate discharging element and the raw material liquid discharging element is as follows:

the outer periphery of the filtrate discharge element has a plurality of upwardly and downwardly directed U-shaped clamps into which catch lugs of the outer periphery of the feed liquid discharge element can reach, the clamps and catch lugs being mutually pulled together to form a clamp-type connection. That is, each clip extends upward and downward and has two lugs which contact upward and downward, respectively, to the catching lugs of the two stock solution discharge members at both axial ends thereof, forming a clip-type connection.

When the filter is assembled, a filtrate discharging element and a raw material liquid discharging element are respectively arranged at two axial ends of the filter medium layer, and the peripheries of the filtrate discharging element and the raw material liquid discharging element are pressed in opposite directions, so that the tail end of a clamping lug at one side of each U-shaped clamp of the filtrate discharging element is mutually pulled with a catching lug, and the extrusion sealing of the filter medium layer is realized; and then a filter medium layer and a raw material liquid discharge element are sequentially arranged on the other side of the filtrate discharge element, and the catching lugs of the raw material liquid discharge element arranged later and the tail ends of the clamping lugs on the other side of each U-shaped clamp of the filtrate discharge element are mutually pulled, so that the extrusion sealing of the other filter medium layer is realized.

Because two lugs of the clamp at the periphery of each filtrate discharging element are respectively clamped to the catching lugs at the periphery of the adjacent raw material liquid discharging element at the two sides, the lugs and the catching lugs are mutually pulled, the filtrate discharging element needs to be respectively pulled upwards and downwards to produce mutual pulling action with the raw material liquid discharging elements at the two sides, and the pulling force provided by the filtrate discharging element is equivalent to the pulling force provided by the filtrate discharging element and needs to be dispersed to the two sides, the problems that the extrusion acting force received by the outer edges of the filter medium layers at the two sides is inconsistent and the extrusion acting strength is too low easily occur, and therefore, the outer edges of the filter medium layers cannot form reliable sealing. For example, when the upstream and downstream pressure differences of the filtration module increase, the raw material liquid may infiltrate from a gap where the outer edge of the filter medium layer and the filtrate discharge element are pressed, causing the raw material liquid to mix with the filtrate, and the filtration efficiency to decrease.

In addition, in order to assemble the raw material liquid discharging element, the filter medium layer and the filtrate discharging element to form an integral complete filter module, the outer Zhou Xu of the filtrate discharging element and the outer Zhou Xu of the raw material liquid discharging element are respectively provided with corresponding connecting parts, the connecting parts at the peripheries of the two discharging elements can be mutually matched to form connection, the structures of the two discharging elements are similar and complementary, namely, the structures of the two discharging elements are different, correspondingly, the integral structure of the two discharging elements is relatively complex, clamping operation is needed between any two adjacent discharging elements, and the assembling steps of the filter element are relatively complicated.

In view of the above, there is a need to improve the structure of the above-described connecting means between filtrate discharge elements or raw material liquid discharge elements to improve the sealing performance of the outer edge of the filter medium layer, thereby improving the filtration efficiency, and to simplify the structure of the filtrate discharge elements or raw material liquid discharge elements and the assembly steps of the filtration module.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the filter element with reliable sealing performance, only the periphery of the first supporting element is provided with a part for clamping, and the first supporting element spans the second supporting element to be connected with the first supporting element closest to the second supporting element, so that the structure of the second supporting element and the assembly steps of the filter element are simplified.

The technical scheme adopted by the utility model is as follows:

a filter cartridge comprising a first support element, a second support element, a depth filtration media sandwiched therebetween, and a central passage in the center of the filter cartridge, the depth filtration media having a first surface facing the first support element and a second surface facing the second support element;

the first support element has a first channel communicating with the first surface of the depth filtration media, a first compression ring located at the periphery of the central channel and a first sealing ring located at the outer edge thereof, the second support element has a second channel communicating with the second surface of the depth filtration media, a second compression ring located at the periphery of the central channel and a second sealing ring located at the outer edge thereof, one of the first channel and the second channel communicating with the central channel;

the first pressing ring and the second pressing ring form sealing extrusion with the outer edge of the deep-layer filter medium, and form sealing extrusion with the region of the deep-layer filter medium, which is positioned at the periphery of the central channel; the method is characterized in that;

the first supporting element is provided with a clamping part and a catching part at the periphery of the first sealing ring, and the axially adjacent clamping parts and catching parts form clamping connection so as to clamp the second supporting element and the deep filtration media at two sides of the second supporting element between the two adjacent first supporting elements.

In the filter element provided by the utility model, two adjacent first supporting elements are clamped at the periphery to generate mutual pulling acting force, the mutual pulling acting force is transmitted to two first sealing rings in the same size and radial inward direction, and further the outer edges of the deep layer filter media positioned between the two first sealing rings and the two second sealing rings and the outer edges of the deep layer filter media form opposite extrusion actions with the same size, namely the extrusion acting force born by the outer edges of the two deep layer filter media is consistent, and the extrusion acting strength is high enough, so that reliable sealing is formed between the outer edges of the deep layer filter media and the first sealing rings and the second sealing rings.

In addition, in the first support element and the second support element, only the outer edge of one of the first support element and the second support element needs to be provided with a clamping part and a capturing part for forming clamping, the outer edge of the other one of the first support element and the second support element does not need to be provided with a clamping part, and the outer edge of the other one of the first support element and the second support element does not need to be provided with any component for clamping, so that the structure of one support element, namely the second support element, can be simplified, and correspondingly, the first support element is clamped to the first support element closest to the first support element at intervals so as to assemble the deep filtration medium and the second support element into the filter element, and therefore, the assembly step of the filter element is greatly simplified.

Further, the clamping portions and the capturing portions are axially arranged at intervals at the outer edge of the first sealing ring and extend in opposite directions, the clamping portions comprise a plurality of clamping surfaces and are circumferentially distributed on the outer edge of the first sealing ring, and the capturing portions are integrally formed on an annular structure of the outer edge of the first sealing ring and are provided with capturing surfaces for clamping the clamping portions.

The clamping parts and the capturing parts are axially arranged at intervals on the periphery of the first sealing ring, the clamping parts are provided with a plurality of clamping surfaces and are circumferentially distributed on the outer edge of the first sealing ring, the capturing parts are of reverse extending annular structures, the structural strength of the capturing parts is high, each clamping part is clamped to the capturing surface of the capturing part, and the clamping strength of each clamping position is high.

Further, the catching part comprises an extension section connected with the outer edge of the first sealing ring and a catching ring formed on the outer wall of the extension section, and the catching ring forms the catching surface towards the end face of the clamping part.

The catching part is integrally formed at the outer edge of the first sealing ring and is connected with the outer edge of the first sealing ring through the extension section of the catching part, the catching ring is formed on the outer wall of the extension section, the end face of the catching part, which faces the clamping part, forms a catching surface for clamping the clamping part, namely the clamping part is clamped to the outer side of the extension section, and interference with the outer periphery of the second supporting element or the deep filtration medium is not easy to generate, so that the clamping operation is more convenient.

Further, the extending direction of the extending section is parallel to the axial direction of the filter element, a cylindrical wall is formed, and the surface of the capturing ring, which is away from the clamping part, is a conical surface.

The extension section is the cylindricality wall that extending direction and filter core's axial parallel, and it provides the required intensity of catching portion, and the surface that catches the ring and deviate from joint portion is the conical surface, promptly from inside to outside, and the thickness of catching the ring reduces gradually, and it makes the catch ring have certain toughness, when assembling with joint portion joint, can form toughness deformation, be difficult for by the fracture.

Further, the clamping portion comprises a main body connected with the outer edge of the first sealing ring and clamping lugs located on the inner wall of the tail end of the main body, and the clamping lugs can be clamped to the capturing ring.

The clamping part is connected with the outer edge of the first sealing ring through the main body of the clamping part, the clamping lug is formed on the inner wall of the tail end of the main body, the clamping part is clamped to the capturing ring through the clamping lug, namely, the whole structure of the clamping part is simple, and the clamping operation is also relatively simple.

Further, the axial end face of the clamping lug, which faces the main body, forms a clamping surface clamped to the capturing surface, and the clamping surface and the capturing surface are both positioned on the radial outer sides of the second supporting element and the depth filter media on two sides of the second supporting element.

The clamping surface and the capturing surface are both positioned on the radial outer sides of the second supporting element and the deep filtration media on two sides of the second supporting element, so that the clamping part is easy to clamp to the capturing part, and the clamping part and the capturing part can not interfere with the periphery of the second supporting element or the periphery of the deep filtration media.

Further, the main body comprises a connecting section connected with the outer edge of the first sealing ring and a transition section integrally formed at the tail end of the connecting section, the connecting section extends obliquely outwards from the starting end connected with the outer edge of the first sealing ring, and the clamping lug is formed on the inner wall of the tail end of the transition section.

The main body is connected with the outer edge of the first sealing ring through the connecting section which extends obliquely, so that the area of a connecting area between the main body and the outer edge of the first sealing ring is increased, and the connecting strength is improved; and the transition section is integrally formed at the tail end of the connecting section, the clamping lugs are formed on the inner wall of the tail end of the transition section, and each component part of the clamping part has a simple structure and provides required functions so as to form reliable clamping with the capturing ring of the capturing part.

Further, the transition section extends from a starting end connected with the tail end of the connecting section, and an included angle between the extending direction of the transition section and the radial direction is larger than an included angle between the extending direction of the connecting section and the radial direction.

The main part passes through the connecting segment that inclination is less and links to each other with the periphery of first sealing ring, and it is gentler with the connection of first sealing ring periphery, and the relative radial inclination of changeover portion is great, can increase the card ear and catch the mutual action intensity of pulling between the ring.

Further, the included angle between the extending direction of the connecting section and the radial direction is between 20 degrees and 50 degrees; and/or the included angle between the transition section and the radial direction is between 60 degrees and 90 degrees.

When the included angle between the extending direction of the connecting section and the radial direction is 20-50 degrees, the connection between the connecting section and the periphery of the first sealing ring is gentle, and the mutual pulling action strength between the clamping lugs at the tail end of the transition section and the capturing ring can be ensured. The included angle between the extending direction of the transition section and the radial direction is between 60 degrees and 90 degrees, so that the mutual pulling action strength between the clamping lugs and the capturing ring is high enough.

Further, the first channel is formed in an axial gap between the clamping part and the capturing part; or, a liquid passing gap communicated with one of the first channel or the second channel is formed between the adjacent clamping parts.

The first channel is arranged in the axial gap between the clamping part and the capturing part and is axially staggered with the clamping part and the capturing part, so that the to-be-filtered liquid at the periphery of the filter element can flow into the first channel rapidly, or the filtrate in the first channel can be discharged rapidly.

Or, a liquid passing gap communicated with one of the first channel or the second channel is formed between the clamping parts which are axially adjacent or circumferentially adjacent, so that raw material liquid at the periphery of the filter element can flow into one of the first channel or the second channel rapidly, or filtrate in one of the first channel or the second channel can be discharged rapidly.

Drawings

Fig. 1 and 2 are perspective views of a filter element according to embodiment 1 of the present utility model in two directions;

FIG. 3 is a front view (corresponding to the orientation of FIG. 1) of the cartridge provided in FIGS. 1 and 2;

FIG. 4 is a cross-sectional view (corresponding to the orientation of FIG. 1) of the cartridge provided in FIGS. 1 and 2;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a partial enlarged view at B in FIG. 4;

FIG. 7 is a semi-sectional isometric view (corresponding to the orientation of FIG. 1) of the cartridge provided in FIGS. 1 and 2;

FIG. 8 is an enlarged view of a portion of FIG. 7 at C;

fig. 9 is a schematic structural view of a filtration unit provided in embodiment 2;

FIG. 10 is a cross-sectional view of the filter unit provided in FIG. 9;

fig. 11 is a semi-sectional isometric view of the filter unit provided in fig. 9.

Wherein 1-first support element, 10-first channel, 11-first sealing ring, 12-first pressing ring, 2-second support element, 20-second channel, 21-second sealing ring, 22-second pressing ring, 3-depth filter medium, 4-central channel, the device comprises a 5-clamping part, a 50-main body, a 51-connecting section, a 52-transition section, a 53-clamping lug, a 530-clamping surface, a 6-capturing part, a 60-extending section, a 61-capturing ring, a 610-capturing surface, a 7-center support, a 71-support split, a 72-gasket and a 73-passing liquid gap.

Detailed Description

Having now better understood the aspects of the present utility model, a clear and complete description of the aspects of embodiments of the present utility model will be presented below with reference to the drawings in accordance with embodiments of the present utility model, it being apparent that the embodiments described are only some, but not all, of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Fig. 1-8 show a cartridge according to embodiment 1, comprising a first support element 1, a second support element 2 and a depth filter medium 3 sandwiched therebetween, and a central channel 4 in the center of the cartridge, wherein the depth filter medium 3 has a first surface facing said first support element 1 and a second surface facing the second support element 2. In this embodiment, the depth filter media 3 has a first surface as its upstream surface and a second surface as its downstream surface. Of course, the reverse is also possible, i.e. the first support element 1 is located on the downstream surface side of the depth filter medium 3 and the second support element 2 is located on the upstream surface side of the depth filter medium 3.

The first support element 1 has a first channel 10 communicating with the first surface of the depth filter medium 3, a first press ring 12 at the outer periphery of the central channel 4 and a first seal ring 11 at its outer edge, the second support element 2 has a second channel 20 communicating with the second surface of the depth filter medium 3, a second press ring 22 at the outer periphery of the central channel 4 and a second seal ring 21 at its outer edge, and one of the first channel 10 and the second channel 20 communicates with the central channel 4.

In this embodiment, the first channel 10 is located at the outer edge of the first supporting element 1, and is formed by radially penetrating the first sealing ring 11, and is used as a liquid inlet channel; the second passage 20 is located inside the second support member 2 at the outer periphery of the central passage 4, and is formed by radially penetrating the second pressing ring 22 as a liquid outlet passage communicating with the central passage 4.

Of course, the first channel 10 may also be formed by radially penetrating the first pressing ring 12, i.e. provided inside the first support element 1, at the periphery of the central channel 4, as a liquid outlet channel communicating with the central channel 4; while the second channel 20 is located at the outer edge of the second support element 2 and is formed by radial penetration of a second sealing ring 21 as a feed channel. Accordingly, the first support element 1 is located on the downstream surface side of the depth filter medium 3, and the second support element 2 is located on the upstream surface side of the depth filter medium 3.

In addition, the central passage 4 is formed by sealing and connecting openings at the respective centers of the first support element 1, the second support element 2 and the depth filter medium 3.

As shown in fig. 4-6, to seal the first and second surfaces of depth filter media 3 from mixing with the feed liquid and filtrate, first seal ring 11 and second seal ring 21 each form a sealing squeeze with the outer edge of depth filter media 3, and first press ring 12 and second press ring 22 each form a sealing squeeze with the region of depth filter media 3 located at the periphery of central passage 4.

As shown in fig. 2, 4 and 6, a central bracket 7 inserted into the central channel 4 is arranged at the center of the filter element, and comprises two bracket split bodies 71, wherein the two bracket split bodies 71 extend into the central channel 4 in opposite directions and are abutted against the side wall of the central channel 4, the tail ends of the two bracket split bodies are clamped and pulled mutually, the starting ends of the two bracket split bodies comprise heads positioned outside the central channel 4, each head is pressed on the end face of the first pressing ring 12 of the first supporting element 1 at the two ends, namely, at the center of the filter element, the two bracket split bodies 71 provide opposite extrusion actions, so that the first pressing ring 12 and the second pressing ring 22 form extrusion sealing with the region of the deep filter medium 3 positioned at the periphery of the central channel 4; and, still be equipped with gasket 72 between the terminal surface and the head of first clamping ring 12, the effect of gasket 72 is so that form sealedly between head and the first clamping ring 12 to prevent unfiltered raw materials liquid from flowing into central passageway 4 from the gap between head and the first clamping ring 12 and mixing with the filtrate, reduce filtration efficiency.

As shown in fig. 4 and 5, in order to assemble the first support element 1, the depth filter media 3 and the second support element 2 stacked up and down in the axial direction to form a filter element, the first support element 1 is provided with a clamping portion 5 and a capturing portion 6 at the periphery of the first sealing ring 11, and the axially adjacent clamping portions 5 and capturing portions 6 form a clamping connection so as to clamp the second support element 2 and the depth filter media 3 at two sides thereof between the adjacent two first support elements 1; that is, the clamping portion 5 of the outer periphery of any one first sealing ring 11 is clamped to the capturing portion 6 of the outer periphery of the axially adjacent first sealing ring 11, and the second supporting element 2 and the depth filtration media 3 on both sides thereof are clamped between the two adjacent first supporting elements 1, so as to form a unit. And, the clamping acting force between the clamping part 5 and the capturing part 6 is radially inwards transmitted to the first sealing ring 11 and the second sealing ring 21, so that the two forms extrusion on the outer ring of the depth filtration medium 3, and the sealing at the position is realized. The plurality of cells are repeatedly stacked axially to form the cartridge. Wherein two adjacent units share one first support element 1.

In the filter element provided by the utility model, two adjacent first support elements 1 are clamped at the periphery to generate mutual pulling acting force, the mutual pulling acting force is transmitted to two first sealing rings 11 in the same size and radial inward direction, and then opposite extrusion actions with the same size are formed on the outer edge of a deep layer filter medium 3, a second sealing ring 21 and the outer edge of the deep layer filter medium 3 positioned between the two first support elements, namely, the extrusion acting force born by the outer edges of the two deep layer filter mediums 3 is consistent, and the extrusion acting strength is high enough, so that reliable sealing is formed between the outer edge of the deep layer filter medium 3 and the first sealing rings 11 and the second sealing rings 21.

Moreover, since only one of the first support element 1 and the second support element 2 needs to be provided with the clamping portion 5 and the capturing portion 6 for forming the clamping, and the other one does not need to be provided with the clamping portion 5 and the capturing portion 6, and the other one does not need to be provided with any component for clamping, the structure of one of the support elements, namely the second support element 2, can be simplified, and accordingly, the first support element 1 is clamped to the nearest first support element 1 at intervals, so that the depth filtration medium 3 and the second support element 2 are clamped between the adjacent two first support elements 1, and the filter element is assembled and formed, and therefore, the assembly steps of the filter element are greatly simplified.

Here, it should be noted that, for simplicity and convenience of description, the support element having the clamping portion 5 and the capturing portion 6 at the outer periphery is named as the first support element 1 in this embodiment. The specific structures of the capturing portion 6 and the engaging portion 5, and the engaging connection structure therebetween will be described in detail.

As shown in fig. 1, 2 and 5, in the present embodiment, the engaging portion 5 and the capturing portion 6 are axially spaced apart from each other at the outer edge of the first seal ring 11 and extend in opposite directions, the engaging portion 5 includes a plurality of engaging portions and is circumferentially distributed on the outer edge of the first seal ring 11, and the capturing portion 6 is an annular structure integrally formed on the outer edge of the first seal ring 11 and has a capturing surface 610 for engaging the engaging portion 5. The periphery of first sealing ring 11 is located to joint portion 5 and catch portion 6 axial interval, and joint portion 5 has a plurality ofly, and the periphery dispersion locates first sealing ring 11, and the annular structure of catch portion 6 as an organic whole extension, and the structural strength of catch portion 6 self is high, and the equal joint of each joint portion 5 is to the catch face 610 of catch portion 6, and the joint intensity that a plurality of joint points provided together is also higher.

As shown in fig. 5 and 8, in this embodiment, the first channel 10 located at the outer edge of the first support element 1 is formed in an axial gap between the clamping portion 5 and the capturing portion 6, and is axially offset from the clamping portion 5 and the capturing portion 6, so that the to-be-filtered liquid on the periphery of the filter element can flow into the first channel 10 quickly, or the filtrate in the first channel 10 can be discharged quickly.

Or, a liquid passing gap 73 communicated with the first channel 10 is formed between the adjacent clamping parts 5, namely, a liquid passing gap 73 communicated with the first channel 10 is formed between the axially adjacent/circumferentially adjacent clamping parts 5, so that raw material liquid at the periphery of the filter element flows through the first channel 10 or filtrate in the first channel 10 is conveniently and rapidly discharged. It should be noted that, when the first channel 10 is disposed at the center of the first support element 10 and the second channel 20 is disposed at the outer edge of the second support element 2, the liquid passing gap 73 between the adjacent clamping portions 5 is communicated with the second channel 20.

As shown in fig. 5 and 7 to 8, the catching part 6 includes an extension 60 connected to the outer edge of the first seal ring 11 and a catching ring 61 formed on the outer wall of the extension 60, and the catching ring 61 forms a catching surface 610 toward the end surface of the engaging part 5. That is, the capturing portion 6 is integrally formed at the outer edge of the first seal ring 11 and is connected with the outer edge of the first seal ring 11 through the extension segment 60, the capturing ring 61 is formed on the outer wall of the extension segment 60, and the capturing surface 610 for the clamping of the clamping portion 5 is formed on the end surface of the clamping portion 5, that is, the clamping portion 5 is clamped to the outer side of the extension segment 60, so that interference with the outer periphery of the second support element 2 or the depth filter medium 3 is not easy to occur during clamping of the clamping portion 5 and the capturing portion 6, and the clamping operation is more convenient.

As shown in fig. 5 and 8, the extending direction of the extending section 60 is parallel to the axial direction of the filter element, forming a cylindrical wall, and the surface of the catching ring 61 facing away from the clamping portion is a conical surface. The extension section 60 is a cylindrical wall with an extension direction parallel to the axial direction of the filter element, and provides the strength required by the capturing portion 6, the surface of the capturing ring 61 facing away from the clamping portion 5 is a conical surface, that is, the thickness of the capturing ring 61 gradually decreases from inside to outside, so that the capturing ring 61 has a certain toughness, and can form toughness deformation and is not easy to break when being clamped and assembled with the clamping portion 5.

As shown in fig. 5 and 8, the catching portion 5 includes a main body 50 connected to an outer edge of the first seal ring 11 and a catching lug 53 positioned at an inner wall of an end of the main body 50, the catching lug 53 being capable of being caught to the catching ring 61. Specifically, the axial end surface of the clip 53 facing the main body 50 forms a clip surface 530 that clips to the capturing surface 610, and the clip surface 530 and the capturing surface 610 are both located radially outward of the second support element 2 and the depth filter media 3 on both sides thereof.

The clamping part 5 is connected with the outer edge of the first sealing ring 11 through the main body 50, the clamping lug 53 is formed on the inner wall of the tail end of the main body 50, and the clamping part 5 is clamped to the capturing ring 61 through the clamping lug 53, namely, the whole structure of the clamping part 5 is simple, and the clamping operation is also simpler. The clamping surface 530 and the capturing surface 610 are both located radially outside the second support element 2 and the depth filter media 3 on both sides thereof, so that the clamping portion 5 is easily clamped to the capturing portion 6, and the clamping portion 5 and the capturing portion 6 do not interfere with the outer periphery of the second support element 2 or the outer periphery of the depth filter media 3.

The main body 50 includes a connecting segment 51 connected to the outer edge of the first seal ring 11 and a transition segment 52 integrally formed at the end of the connecting segment 51, the connecting segment 51 extends obliquely outwards from the initial end connected to the outer edge of the first seal ring 11, and a clamping lug 53 is formed on the inner wall of the end of the transition segment 52. The main body 50 is connected with the outer edge of the first sealing ring 11 through the connecting segment 51 which extends obliquely, so that the area of the connecting area of the main body 50 and the outer edge of the first sealing ring 11 is increased, and the connection strength is improved; and a transition section 52 is integrally formed at the end of the connecting section 51, and a clamping lug 53 is formed on the inner wall of the end of the transition section 52, so that each component of the clamping part 5 has a simple structure and provides a required function so as to form reliable clamping with the capturing ring 61 of the capturing part 6.

The transition section 52 extends from the initial end connected with the tail end of the connecting section 51, the included angle between the extending direction of the transition section 52 and the radial direction is larger than the included angle between the extending direction of the connecting section 51 and the radial direction, namely, the main body 50 is connected with the periphery of the first sealing ring 11 through the connecting section 51 with a smaller inclined angle, the connection between the main body 50 and the periphery of the first sealing ring 11 is more gentle, the inclined angle of the transition section 52 relative to the radial direction is larger, and the interaction strength between the clamping lugs 53 and the capturing ring 610 can be increased.

Specifically, the included angle between the extending direction of the connecting section 51 and the radial direction is 20 ° -50 °, the connection between the connecting section and the outer periphery of the first sealing ring 11 is gentle, and the mutual pulling strength between the clamping lugs 53 at the tail end of the transition section 52 and the capturing ring 61 can be ensured. For example, the angle between the direction of extension of the connecting section 51 and the radial direction may be 20 °, 25 °, 35 °, 45 ° or 50 °.

The angle between the extension direction and the radial direction of the transition section 52 is between 60 degrees and 90 degrees, so that the strength of the mutual pulling action between the clamping lugs 53 and the capturing ring 61 is high enough. For example, the angle between the direction of extension of the transition section 52 and the radial direction may be 60 °, 65 °, 75 °, or 90 °, i.e., the transition section 52 may extend in a direction perpendicular to the radial direction.

Of course, the aforementioned center support 7 may be omitted. Instead, a clamping part and a catching part similar to the above are arranged at the inner edge of the first pressing ring 12, so that at the center of the filter element, the clamping parts and the catching parts which are adjacent in the axial direction also form clamping, the adjacent first supporting elements 1 also form fixing and connection at the center, and the second pressing ring 22 of the second supporting element 2 and the first pressing ring 12 form extrusion action on the inner edge of the deep filter medium 3 clamped between the two, so that sealing is realized. In addition, the clamping parts or the catching parts at the center and the two ends of the filter element are respectively and hermetically clamped with a joint so as to prevent unfiltered raw material liquid from directly entering the central channel 4 to be mixed with filtrate, and reduce the filtration efficiency.

The structure of the filter cartridge provided in embodiment 2 is substantially the same as that of the filter cartridge provided in embodiment 1, except that the engagement portion 5 and the catching portion 6 each include a plurality of catching pieces which are circumferentially and axially dispersed around the outer periphery of the first seal ring 11 of the first support member 1, that is, the catching portion 6 is not an integral annular structure, but a plurality of catching pieces which are circumferentially and dispersedly provided around the outer periphery of the first seal ring 11, which corresponds to the catching ring in embodiment 1, are formed by breaking at a plurality of positions, and the catching pieces and the engagement portion 5 are axially and circumferentially dispersed around the outer periphery of the first seal ring 11.

In particular, as shown in fig. 9 to 11, the filter unit is formed by stacking a first support element 1, a depth filter medium 3, a second support element 2, the depth filter medium 3 and the first support element 1 in sequence, a plurality of filter units of this structure are axially connected to form a filter cartridge, and adjacent units share one unit support element 1. Wherein, the periphery of the first sealing ring 11 of the first support element 1 comprises two rows of clamping parts 5 and capturing parts 6 which are axially arranged at intervals:

one row of the device comprises a plurality of clamping parts 5 and a plurality of capturing parts 6 which are arranged in a dispersing way along the circumferential direction, wherein the clamping parts 5 and the capturing parts 6 can be arranged adjacently and at intervals, or the clamping parts 5 are arranged continuously firstly, then one or more capturing parts 6 are arranged repeatedly, or the capturing parts 6 are arranged continuously firstly, then one or more clamping parts 5 are arranged repeatedly.

Correspondingly, the other axially opposite row also comprises a plurality of clamping parts 5 and a plurality of catching parts 6 which are arranged in a circumferential and dispersed manner, and in the two axially opposite rows of clamping parts 5 and catching parts 6, the positions of the clamping parts 5 and the catching parts 6 are just staggered, namely, the clamping parts 6 are arranged at the clamping parts 5 of the other axially opposite row corresponding to the previous row, the clamping parts 5 are arranged at the clamping parts 6 of the other axially opposite row corresponding to the previous row, so that when the first support element 1, the deep layer filter medium 3, the second support element 2, the deep layer filter medium 3 and the first support element 1 are axially stacked to form a unit and a filter element, the clamping parts 5 of the outer side Zhou Mouchu of one first sealing ring 11 can be just clamped to the catching parts 6 of the corresponding positions of the outer periphery of the adjacent first sealing ring 11, and the clamping parts 6 of the other periphery of the first sealing ring 11 form clamping with the clamping parts 5 of the corresponding positions of the outer periphery of the adjacent first sealing ring 11, and the like, namely, the clamping operation between the clamping parts 5 and the catching parts 6 of the outer side Zhou Suoyou of the adjacent two first sealing rings 11 is completed.

The filter element provided in the above embodiments 1 and 2 is sealed and installed in a housing having an inlet and an outlet, so that a complete filter can be formed, and a filtering function can be realized.

Claims (10)

1. A filter cartridge comprising a first support element, a second support element, a depth filtration media sandwiched therebetween, and a central passage in the center of the filter cartridge, the depth filtration media having a first surface facing the first support element and a second surface facing the second support element;

the first support element has a first channel communicating with the first surface of the depth filtration media, a first compression ring located at the periphery of the central channel and a first sealing ring located at the outer edge thereof, the second support element has a second channel communicating with the second surface of the depth filtration media, a second compression ring located at the periphery of the central channel and a second sealing ring located at the outer edge thereof, one of the first channel and the second channel communicating with the central channel;

the first pressing ring and the second pressing ring form sealing extrusion with the outer edge of the deep-layer filter medium, and form sealing extrusion with the region of the deep-layer filter medium, which is positioned at the periphery of the central channel; the method is characterized in that;

the first supporting element is provided with a clamping part and a catching part at the periphery of the first sealing ring, and the axially adjacent clamping parts and catching parts form clamping connection so as to clamp the second supporting element and the deep filtration media at two sides of the second supporting element between the two adjacent first supporting elements.

2. The filter cartridge of claim 1, wherein the clamping portions and the catching portions are axially spaced apart at the outer edge of the first seal ring and extend in opposite directions, the clamping portions include a plurality of clamping surfaces circumferentially distributed around the outer edge of the first seal ring, and the catching portions are formed in an annular structure integrally formed with the outer edge of the first seal ring and have catching surfaces for the clamping portions to clamp.

3. The filter cartridge of claim 2, wherein the catch portion includes an extension connected to an outer edge of the first seal ring and a catch ring formed on an outer wall of the extension, an end surface of the catch ring facing the snap-fit portion forming the catch surface.

4. A cartridge according to claim 3, wherein the extension of the extension is parallel to the axial direction of the cartridge, forming a cylindrical wall, and the surface of the catch ring facing away from the engagement portion is a conical surface.

5. A cartridge according to claim 3, wherein the clip comprises a body connected to an outer edge of the first seal ring and a clip located on an inner wall at an end of the body, the clip being clip-engageable to the catch ring.

6. The filter cartridge of claim 5, wherein the axial end face of the clip facing the main body forms a clip face that clips to a capture face, both the clip face and capture face being located radially outward of the second support element and depth filter media on both sides thereof.

7. The filter cartridge of claim 5, wherein the body includes a connecting segment connected to the outer edge of the first seal ring and a transition segment integrally formed at an end of the connecting segment, the connecting segment extending obliquely outward from a beginning end thereof connected to the outer edge of the first seal ring, the bayonet catch being formed on an inner wall of the end of the transition segment.

8. The filter cartridge of claim 7, wherein the transition section extends from a start end thereof connected to an end of the connecting section, and wherein an angle A2 between an extending direction of the transition section and a radial direction is greater than an angle A1 between an extending direction of the connecting section and the radial direction.

9. The filter element according to claim 8, wherein the angle A1 between the direction of extension of the connecting section and the radial direction is between 20 ° and 50 °; and/or the included angle A2 between the transition section and the radial direction is between 60 degrees and 90 degrees.

10. The filter cartridge of claim 2, wherein the first channel is formed in an axial gap between the clip portion and the catch portion; or, a liquid passing gap communicated with one of the first channel or the second channel is formed between the adjacent clamping parts.