CN221131335U - Fixed limiting element, filter element and filter - Google Patents

Abstract

The utility model provides a fixed limiting element, a filter element and a filter, and belongs to the technical field of filters, wherein the fixed limiting element comprises: the device comprises a main body part and a deformation part, wherein the main body part is provided with a lug extending along the axial direction; the deformation part is provided with a plurality of first extending ribs which are uniformly arranged around the circumference of the main body part and extend outwards from the main body part along the radial direction, the first extending ribs have elasticity for radial deformation, and the deformation part has different outer diameters through the elastic deformation of the plurality of first extending ribs along the radial direction; the fixed limiting element is used for being connected to the filter element and matched with the inner wall of the capsule shell, and particularly, the first extending rib of the deformation part extends outwards in the radial direction and then is abutted against the inner wall of the capsule shell, so that the radial displacement of the filter element is limited, wherein the first extending rib is arranged to have elasticity of deforming in the radial direction, larger size deviation can be adapted, and the filter element can be ensured to be limited effectively all the time.

Description

Fixed limiting element, filter element and filter

Technical Field

The utility model relates to the technical field of filters, in particular to a fixed limiting element, a filter element and a filter.

Background

The bag filter in the filtering industry is internally provided with a filter element which plays a role in actual filtering, and is matched with a bag shell slightly longer than the filter element, and the bag filter is connected into a whole. Depending on the application, a larger area filter is required, and the length of the cartridge is greater, for example, in excess of 10 inches. During the filtration process, the filter element can generate certain radial shaking under the continuous impact of fluid, and the shaking can cause leakage of the filter element or even the direct separation of the filter element from the capsule shell after certain accumulation.

In order to ensure that the amplitude of the left and right shaking is not too large under the impact of the fluid of the filter element in the filtering process. A plurality of fins are generally formed on the periphery of the non-welding end cover of the filter element in a whole, and the fins are abutted against the inner wall of the capsule shell, so that radial limit is formed between the filter element and the capsule shell, and the purpose of limiting the left-right shaking amplitude of the filter element is achieved.

However, since the fins are integrally formed on the outer periphery of the non-welded end cap of the filter cartridge, the size of the bladder that it can accommodate is uniquely determined when the size of the non-welded end cap of the filter cartridge and the fins on its outer periphery are determined. That is, the limit structure of the existing filter element has higher requirement on the dimensional accuracy, and the slight deviation of the dimension can lead to that the filter element cannot be installed in the capsule shell or the limit structure cannot play a proper limit role.

Therefore, the limit structure of the existing filter element needs to be further improved so as to improve the universality of size matching between the filter element and the capsule shell, adapt to larger size deviation and ensure that the filter element can be always effectively limited.

Disclosure of utility model

Therefore, the utility model aims at the defects of the prior art and provides a fixed limiting element, a filter element and a filter.

In order to solve the above technical problems, the present utility model provides a fixed limiting element, comprising:

a body portion having a projection thereon extending in an axial direction;

The deformation part is provided with a plurality of first extension ribs which are uniformly arranged around the circumference of the main body part and extend outwards along the radial direction from the main body part, the first extension ribs are elastic in radial deformation, and the deformation part is provided with different outer diameters through the elastic deformation of the plurality of first extension ribs along the radial direction.

Optionally, the first extension rib is at least partially segmented into arcuate segments.

Optionally, the method further comprises: and the supporting part extends outwards from the main body part in the radial direction, the extending direction of the supporting part is perpendicular to the axial direction of the main body part, and the outer diameter of the supporting part is smaller than the maximum outer diameter of the first extending rib.

Optionally, the support part includes: and a plurality of second extension ribs uniformly arranged around the circumference of the main body portion.

Optionally, the width of the first extension rib and/or the second extension rib has a tendency to taper towards the extension end.

Optionally, the root width of the first extension rib is 8-20mm, and the tail end width is 3-10mm; the root width of the second extension rib is 4-10mm, and the tail end width is 1-5mm.

Optionally, a plurality of support columns are arranged in the circumferential direction of the main body part, the support columns extend along the axial direction towards the direction far away from the protruding blocks, and the root parts of the first extension ribs of the deformation parts are connected to the support columns.

Optionally, the main body part is of a ring disc structure, the protruding blocks are provided with a plurality of round protruding blocks, and a fracture is formed between the plurality of protruding blocks.

Optionally, the cross-section of the bump tapers away from the top end of the body portion.

Optionally, the outer diameter of the main body part is 45-55mm, and the inner diameter is 20-30mm; the outer diameter of the convex block is 30-45mm, the inner diameter is 25-35mm, and the height is 1.5-3.5mm; at least one side surface of the lug is an inclined surface, and the inclined angle of the inclined surface is 2-10 degrees.

The utility model provides a filter element, comprising: the fixed limiting element of filter core body and arbitrary in above-mentioned scheme, fixed limiting element's lug fixed connection is in the afterbody of filter core body.

The present utility model provides a filter comprising: the filter element comprises a capsule shell and the filter element in the scheme, wherein the extrados surface of the first extension rib is used for being in contact with the inner wall of the capsule shell.

Optionally, a plurality of second extending ribs are uniformly arranged in the circumferential direction of the main body part, and the outer diameter of each second extending rib is smaller than the inner diameter of the capsule shell.

Optionally, the distance between the tail end of the second extension rib and the inner wall of the capsule shell is 1.5-6mm.

The technical scheme of the utility model has the following advantages:

1. The fixed limiting element is used for being connected to the filter element and matched with the inner wall of the capsule shell, and particularly, the first extending rib of the deformation part extends outwards in the radial direction and then abuts against the inner wall of the capsule shell, so that the radial displacement of the filter element is limited, wherein the first extending rib is arranged to have elasticity of deforming in the radial direction, larger size deviation can be adapted, and the filter element can be ensured to be limited effectively all the time.

2. According to the fixed limiting element provided by the utility model, the first extending rib is contacted with the inner wall of the capsule shell through the extrados, so that the first extending rib can relatively slide along the inner wall of the capsule shell during installation, thereby generating larger resistance and protecting the inner wall of the capsule shell. In addition, on the basis of deformation portion, still be provided with supporting part, have the clearance between the inner wall of supporting part and the capsule shell, under the normal condition, the second of supporting part extends the muscle and can not contact with the capsule shell, and when the radial displacement of filter core in the capsule shell was great, the supporting part played and further was limited into the effect to the radial position of filter core, improves the reinforcing effect to filter core stability promptly.

3. The filter element provided by the utility model is provided with the fixed limiting element, so that the filter element can be more stable in the capsule shell.

4. The filter provided by the utility model adopts the filter element, so that the filter element is more stable in the use process and is not easy to leak.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of one embodiment of the fixed stop element provided in example 1 of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a perspective view of one embodiment of the fixed stop element provided in example 2 of the present utility model;

FIG. 5 is a perspective view of one embodiment of the fixed stop element provided in example 3 of the present utility model;

FIG. 6 is a front cross-sectional view of one embodiment of a filter cartridge provided in an embodiment of the utility model;

Fig. 7 is a front cross-sectional view of one embodiment of a filter provided in an embodiment of the present utility model.

Reference numerals illustrate:

1. A main body portion; 2. a bump; 3. a first extension rib; 4. an arc section; 5. an outer cambered surface; 6. a second extension rib; 7. a support column; 8. an inclined surface; 9. a filter element body; 10. a boss; 11. a circular flange; 12. a capsule shell; 13. an end cap.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

The present embodiment provides a fixed stop element for a cartridge in a capsule filter, and in particular for attachment to the cartridge and mating with the inner wall of the capsule 12.

As shown in fig. 1, a specific implementation manner of the fixed limiting element provided in this embodiment includes: the filter element comprises a main body part 1 and a deformation part connected to the main body part 1, wherein the main body part 1 is provided with a lug 2 extending along the axial direction, and the lug 2 can be used for being fixedly connected with the tail part of the filter element; the deformation part is provided with a plurality of first extension ribs 3 which are uniformly arranged around the circumference of the main body part 1 and extend outwards from the main body part 1 along the radial direction, the first extension ribs 3 have elasticity for radial deformation, and the deformation part has different outer diameters through the elastic deformation of the plurality of first extension ribs 3 along the radial direction; that is, the outer diameter of the deformation portion can be elastically varied, and specifically, may have a first outer diameter having a larger diameter and a second outer diameter having a smaller diameter. The deformation part maintains the first outer diameter in a free state, and after the deformation part is inserted into the capsule shell 12, the first extension rib 3 is connected with the inner wall of the capsule shell 12, so that the deformation part elastically deforms under the pressing of the capsule shell 12, and the outer diameter of the deformation part is changed into a second outer diameter with smaller diameter and is matched with the inner wall of the capsule shell 12. The outer diameter of the first extending rib refers to the maximum distance of the first extending rib from the axis of the main body, and in this embodiment, the first extending rib 3 extends radially outwards from the main body 1, and is not limited to extending only in a direction perpendicular to the axis, but refers to: the first extension rib 3 has a tendency to extend outwardly in the radial direction of the main body portion 1 as seen in the axial direction. In particular, the first extension rib 3 extends outwardly in both the axial direction and the radial direction of the main body 1.

The fixed limiting element that this embodiment provided, through the first extension muscle 3 of deformation portion radially outwards extend the back with the inner wall butt of capsule shell 12 to the radial displacement of restriction filter core, wherein set up first extension muscle 3 to have the elasticity along radial deformation, can adapt to bigger size deviation, ensure can play effectual spacing effect to the filter core all the time.

As shown in fig. 1, in the fixed limiting element provided in this embodiment, the extending direction of the first extending rib 3 is not perpendicular to the axial direction of the main body 1. That is, the extending direction of the first extending rib 3 has a certain inclination angle with respect to the axial direction of the main body portion 1. The extending direction of the first extending rib 3 is not limited to a straight line, and the first extending rib 3 may extend in a curved line. In this embodiment, by setting the inclination angle, when the first extending rib 3 is elastically deformed in the radial direction, the deformation amount can be increased by changing the angle to deform. In addition, the above limitation is not essential, and in some alternative embodiments, the extending direction of the first extending rib 3 may be perpendicular to the axial direction of the main body 1, where the first extending rib 3 may be provided to have elasticity, for example, an elastic material such as rubber or the like may be used; or may be provided as a telescopic rod, the inside being supported by a spring or the like.

As shown in fig. 1, in the fixed limiting element provided in this embodiment, the portion of the first extending rib 3 is segmented into an arc-shaped segment 4, and by setting the arc-shaped segment 4, the amplitude of elastic deformation of the first extending rib 3 can be increased. In addition, in the fixed limiting element provided in this embodiment, the first extending rib 3 has an outer arc surface 5, and the outer arc surface 5 is used to contact with the inner wall of the capsule shell 12; by this arrangement, the extrados 5 of the first extension rib 3 can be slid more smoothly along the inner wall of the capsule 12 when the capsule 12 is mounted. Further, the first extending rib 3 may be provided as an arc section 4 at the extending end, and when the capsule shell 12 is installed, the outer arc surface 5 of the arc section 4 abuts against the inner wall of the capsule shell 12, so that in the process of abutting against the inner wall of the capsule shell 12, the first extending rib can also slide smoothly on the inner wall of the capsule shell 12, thereby facilitating the installation and the removal of the capsule shell 12. In addition, as an alternative embodiment, the first extending rib 3 may be integrally provided with an arc shape, or may be provided with other structures such as an arc shape only at the middle section.

Specifically, in this embodiment, the first extending rib 3 is a clamping jaw structure extending in a direction away from the bump 2, and the first extending rib 3 is further away from the filter element, so that the first extending rib 3 can radially support the filter element more firmly. Of course, the above description is not limiting, and in some alternative embodiments, the first extending rib 3 may extend toward the direction approaching the bump 2, so that the fixed limiting element is shortened in the axial direction, so as to adapt to more application environments.

As shown in fig. 2, in the fixed limiting element provided in this embodiment, the width of the first extending rib 3 tends to gradually decrease toward the extending end. The trend may be smaller and smaller, or may eventually be constant or slightly increasing, and belongs to a gradually decreasing trend. Specifically, the root width of the first extending rib 3 is M, and the end width is M. In this embodiment, M is 8 to 20mm and M is 3 to 20mm. By doing so, the elastic deformability of the first extension rib 3 can be increased. Of course, the above arrangement is not limitative, and in some alternative embodiments, the dimensions of the first extension bar 3 may be adapted according to the actual situation.

As shown in fig. 1, in the fixed limiting element provided in this embodiment, the main body 1 is in a ring-disc structure, and the center of the main body 1 is provided with a through hole, so that air can be prevented from converging between the main body 1 and the filter element by arranging the main body 1 in the ring-disc structure, and air can overflow outwards from the ring-disc center of the main body 1, thereby ensuring filtering stability. Of course, this is not limiting, and in some alternative embodiments the body part 1 may be of other shape, for example a cylinder with a certain thickness, etc.

As shown in fig. 1, in the fixed limiting element provided in this embodiment, a plurality of support columns 7 are disposed at intervals in a circumferential direction of the main body 1, the support columns 7 extend along an axial direction away from the bump 2, and root portions of the first extension ribs 3 of the deformation portion are connected to the support columns 7. Through above-mentioned setting, make first extension muscle 3 can extend towards the direction of keeping away from the filter core more to when radially spacing the filter core, can be more firm. In addition, in some alternative embodiments, the support column 7 may be omitted, and the first extension rib 3 may extend directly from the edge of the main body 1.

As shown in fig. 1, in the fixed limiting element provided in this embodiment, the bump 2 has a plurality of circular bumps formed on one surface of the main body 1, and a fracture is formed between the plurality of bumps 2. Through the setting of this fracture, make the space formation passageway between fixed spacing element and the filter core to the effective discharge of the commodity circulation in this space of being convenient for avoids the commodity circulation to gather, produce and detain in this region, influences the filter effect. It should be noted that, when the fixed limiting element is welded to the filter element, the end portions of the plurality of protruding blocks 2 may be abutted to the tail portion of the filter element in a fusion welding manner, and then the protruding blocks 2 and the filter element are fixedly connected under the action of appropriate temperature and pressure. Wherein the fusion welding can be one or more of thermal welding, ultrasonic welding and vortex welding. In addition, in some alternative embodiments, the welding manner may be diffusion welding, etc.

As shown in fig. 3, in the fixed limiting element provided in this embodiment, the cross section of the bump 2 gradually decreases toward the top end away from the main body 1. So set up, when carrying out fusion welding connection between lug 2 and the filter core, the top of lug 2 melts gradually to can increase the fusion welding face gradually, guarantee welded stability. Specifically, in the fixed limiting element provided in this embodiment, two symmetrical side edges of the bump 2 are inclined planes 8. By this arrangement, the tip of the bump 2 is gradually reduced. In addition, in some alternative embodiments, the bump 2 may have a slope on one side, or have slopes on four sides, which are not limited. In this embodiment, the inclined plane has an inclination angle f, and the specific value of f may be 2-10 °. In the welding process, when the inclination angle f is smaller than 2 degrees, the width of the welding surface changes rapidly, the stability of welding is easy to be reduced, when the inclination angle f is larger than 10 degrees, the top end area of the convex block 2 is smaller, the area of the welding surface is insufficient, the welding effect is not ideal, and defects such as dislocation or cavities are easy to generate.

As shown in fig. 2 and 3, in the present embodiment, the outer diameter c of the main body 1 is 45 to 55mm, and the inner diameter d is 20 to 30mm. The outer diameter a of the plurality of protrusions which surround to form a ring shape is 30-45mm, the inner diameter b is 25-35mm, the height h of each protrusion is 1.5-3.5mm, and the width e of a fracture between two adjacent protrusions is 1-6mm. Of course, the above dimensions are not limiting, and in some alternative embodiments, the ratio of the above dimensions may be adapted.

Example 2

This embodiment provides a fixed stop element that is further modified on the basis of embodiment 1.

As shown in fig. 4, the fixed limiting element provided in this embodiment further includes, on the basis of embodiment 1: a supporting part. The support part extends outwards from the main body part 1 in the radial direction, the extending direction of the support part is perpendicular to the axial direction of the main body part 1, and the maximum outer diameter of the support part is smaller than the inner diameter of the capsule shell 12; specifically, the distance between the tail end of the second extending rib 6 and the inner wall of the capsule shell 12 is 1.5-6mm. Through the arrangement of the supporting part, the radial direction of the filter element can be further supported when necessary, specifically, under normal conditions, the second extension rib 6 of the supporting part cannot be in contact with the capsule shell 12, when the radial displacement of the filter element in the capsule shell 12 is large, for example, when the radial displacement of the filter element in the capsule shell 12 occurs, the outer diameter of the second extension rib cannot change, and the supporting part can play a role in further limiting the radial position of the filter element, namely, the reinforcing effect on the stability of the filter element is improved.

As shown in fig. 4, in the fixed limiting element provided in this embodiment, the supporting portion includes: a plurality of second extension bars 6 uniformly arranged around the circumference of the body part 1. When the filter element is used, the extending end of the second extending rib 6 is abutted against the inner wall of the capsule shell 12, and the weight of the fixed limiting element can be reduced through the arrangement of the second extending rib 6, so that the filter element is prevented from being excessively burdened. In addition, in some alternative embodiments, the support portion may take other forms, such as a ring extending radially outward, or the like.

As shown in fig. 4, in the fixed limiting element provided in this embodiment, the second extending rib 6 has a columnar structure, and in the installation process of the folded filter element, the folded filter element can be prevented from being skewed, so that the connection between the folded filter element and the end cover 13 is misplaced, and the overall tightness of the filter is affected. The distance between the top end of the second extending rib 6 and the inner wall of the capsule shell 12 is 1.5-6mm, when the distance is too small, collision is easy to occur between the second extending rib 6 and the capsule shell 12 or the folding filter element is misplaced due to slight offset in the process of installing the filter element in the shell, and when the distance is too large, the effect of the second extending rib 6 is not obvious and is even smaller than the outer diameter of the filter element main body, so that the filter element is easy to lose effect.

As shown in fig. 4, in the fixed limiting element provided in this embodiment, the starting positions of the deformation portion and the supporting portion extending outwards have axial spacing on the main body portion 1. Specifically, a plurality of support columns 7 are arranged at intervals in the circumferential direction of the main body part 1, the support columns 7 extend along the axial direction away from the protruding blocks 2, and the root parts of the first extension ribs 3 of the deformation parts are connected to the support columns 7. Through above-mentioned setting, make first extension muscle 3 can extend towards the direction of keeping away from the filter core more to when radially spacing the filter core, can be more firm. In addition, in some alternative embodiments, the support column 7 may be omitted, and the deformation portion and the starting point position of the support portion extending outward may be set to have an axial distance on the main body portion 1 in other manners, for example, the main body portion 1 may be set to have a certain thickness, and the support portions may be set to be offset in the thickness direction of the main body portion 1.

In addition, as shown in fig. 4, in the fixed limiting element provided in this embodiment, the first extending ribs 3 and the second extending ribs 6 are staggered in sequence in the circumferential direction of the main body portion 1. That is, each of the second extending ribs 6 is located between two adjacent first extending ribs 3 in the circumferential direction. By the arrangement, the supporting effect on the filter element can be increased.

As shown in fig. 2, in the fixed limiting element provided in this embodiment, the width of the second extending rib 6 tends to gradually decrease toward the extending end. The trend may be smaller and smaller, or may eventually be constant or slightly increasing, and belongs to a gradually decreasing trend. By the arrangement, the weight of the second extending rib 6 can be reduced, and the straightness of the second extending rib 6 extending outwards can be ensured. Specifically, the root width N of the second extending rib 6 is 4-10mm, and the end width N is 1-5mm. Of course, this is not limiting and in some alternative embodiments the dimensions may be adapted to the actual situation.

Example 3

The present embodiment provides a fixed limiting element, which is a modification performed on the basis of embodiment 2.

As shown in fig. 5, a specific implementation manner of the fixed limiting element provided in this embodiment includes: the filter comprises a main body part 1 and a deformation part connected to the main body part 1, wherein the main body part 1 is provided with a lug 2 extending along the axial direction, and the lug 2 is used for being fixedly connected with a filter element; the deformation part is provided with a plurality of first extension ribs 3 which are uniformly arranged around the circumference of the main body part 1 and extend outwards from the main body part 1 in the radial direction, the maximum outer diameter formed by the plurality of first extension ribs 3 is matched with the inner diameter of a capsule shell 12 for accommodating the filter element, and the first extension ribs 3 have elasticity for deforming in the radial direction.

In addition, the fixed limiting element that this embodiment provided still includes: a supporting part. The support part extends outwards from the main body part 1 in the radial direction, the extending direction of the support part is perpendicular to the axial direction of the main body part 1, and the maximum outer diameter of the support part is smaller than the inner diameter of the capsule shell 12. By means of the arrangement of the supporting portion, the filter element can be further supported, and specifically, the distance between the tail end of the second extending rib 6 and the inner wall of the capsule shell 12 is 1.5-6mm. The second extension rib 6 of the support portion is normally not in contact with the capsule 12, said support portion serving to further define the radial position of the cartridge, i.e. to increase the reinforcing effect on the stability of the cartridge, when the radial displacement of the cartridge in the capsule 12 is large, for example when it is offset.

As shown in fig. 5, the fixed limiting element provided in this embodiment is different from the fixed limiting element in embodiment 2 in that: the bending directions of the deformation parts are different.

Specifically, in this embodiment, the first extension rib 3 of the deformation portion extends toward a direction approaching the bump 2. By the arrangement, the axial size of the fixed limiting element can be reduced as a whole, so that the fixed limiting element is suitable for more application environments.

Example 4

As shown in fig. 6, the present embodiment provides a filter cartridge including: the filter element comprises a filter element body 9 and the fixed limiting element in the embodiment, wherein the convex block 2 of the fixed limiting element is fixedly connected to the tail part of the filter element body 9; specifically, the connection may be by welding. After the filter element is installed in the capsule shell 12, the tail of the filter element is radially limited by the fixed limiting element, so that the tail of the filter element is prevented from shaking.

As shown in fig. 6, in the filter element provided in this embodiment, the tail portion of the filter element body 9 has a boss 10 for receiving the protruding block 2 of the fixed limiting element. Through the arrangement of the boss 10, the welding stability can be ensured, so that the filter element is prevented from being damaged in the welding process. In addition, in some alternative embodiments, the boss 10 on the filter element may be omitted, and the boss 2 of the fixed limiting element may be directly welded to the tail of the filter element.

Example 5

As shown in fig. 7, the present embodiment provides a filter including: a capsule 12 and a filter cartridge as described in the previous embodiments, which is inserted and connected inside said capsule 12.

Specifically, the mouth of the capsule 12 has a removable end cap 13, and the head of the filter cartridge is mounted on the end cap 13. The head of the filter element is provided with a circular flange 11 extending outwards along the axial direction, the end cover 13 is provided with an interface for being in butt joint with the circular flange 11, and the circular flange 11 and the interface can be connected through welding after being in butt joint.

When the end cover 13 is inserted into the capsule shell 12 with the filter element, the end cover 13 is connected with the mouth part of the capsule shell 12, so that a complete filter can be formed.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (14)

1. A stationary stop element, comprising:

A main body (1), wherein the main body (1) is provided with a lug (2) extending along the axial direction;

The deformation part is provided with a plurality of first extension ribs (3) which are uniformly arranged around the circumference of the main body part (1) and extend outwards from the main body part (1) along the radial direction, the first extension ribs (3) have elasticity for radial deformation, and the deformation part has different outer diameters through the elastic deformation of the plurality of first extension ribs (3) along the radial direction.

2. A fixed stop element according to claim 1, characterized in that the first extension rib (3) is at least partially segmented into arcuate segments (4).

3. The stationary spacing element of claim 1, further comprising: and the supporting part extends outwards from the main body part (1) in the radial direction, the extending direction of the supporting part is perpendicular to the axial direction of the main body part (1), and the outer diameter of the supporting part is smaller than the maximum outer diameter of the first extending rib (3).

4. A fixed stop element according to claim 3, wherein the support comprises: and a plurality of second extension ribs (6) uniformly arranged around the circumference of the main body part (1).

5. The fixed stop element according to claim 4, characterized in that the width of the first extension rib (3) and/or the second extension rib (6) has a tendency to taper towards the extension end.

6. The fixed limiting element according to claim 5, characterized in that the first extension rib (3) has a root width of 8-20mm and a tip width of 3-10mm; the root width of the second extension rib (6) is 4-10mm, and the tail end width is 1-5mm.

7. The fixed limiting element according to claim 1, characterized in that a plurality of support columns (7) are arranged in the circumferential direction of the main body part (1), the support columns (7) extend along the axial direction away from the protruding blocks (2), and the root parts of the first extension ribs (3) of the deformation parts are connected to the support columns (7).

8. The fixed limiting element according to claim 1, wherein the main body part (1) is of a circular disc-shaped structure, the protruding blocks (2) are provided with a plurality of round protruding blocks (2) which are formed on one surface of the main body part (1), and a fracture is formed between the plurality of protruding blocks (2).

9. A fixed stop element according to claim 8, characterized in that the cross section of the projection (2) tapers away from the top end of the body portion (1).

10. A fixed stop element according to claim 8, characterized in that the outer diameter of the body part (1) is 45-55mm and the inner diameter is 20-30mm; the outer diameter of the convex block (2) is 30-45mm, the inner diameter is 25-35mm, and the height is 1.5-3.5mm; at least one side surface of the lug (2) is an inclined surface, and the inclined angle of the inclined surface is 2-10 degrees.

11. A filter cartridge, comprising: the filter element comprises a filter element body (9) and the fixed limiting element as claimed in any one of claims 1 to 10, wherein the lug (2) of the fixed limiting element is fixedly connected to the tail of the filter element body (9).

12. A filter, comprising: a capsule (12) and a filter cartridge as claimed in claim 11, the extrados (5) of the first extension rib (3) being adapted to be in contact with the inner wall of the capsule (12).

13. The filter according to claim 12, characterized in that the body portion (1) is circumferentially uniformly arranged with a number of second extension ribs (6), the outer diameter of the second extension ribs (6) being smaller than the inner diameter of the capsule.

14. A filter according to claim 13, wherein the second extension rib (6) ends at a distance of 1.5-6mm from the inner wall of the capsule (12).