CN220715116U - Filter element and filter device with sealed central tube - Google Patents

Abstract

The utility model discloses a central tube sealed filter element, which comprises a shell, an upper cover, a filter layer, a lower cover and a central tube, wherein the upper cover is connected with the shell, the filter layer is fixedly connected with the upper cover and the lower cover respectively and is arranged between the upper cover and the lower cover, the upper cover is provided with a filter inlet, the central tube is connected with the upper cover, the central tube is provided with a filter outlet, the filter outlet is provided with a sealing part, and the sealing part is used for sealing between the filter element and a filter head.

Description

Filter element and filter device with sealed central tube

Technical Field

The utility model relates to the field of liquid and gas filters, in particular to a filter element with a sealed central tube and a filter device.

Background

An existing filter cartridge, for example, patent No. 202121218911.3, entitled rear axle gear oil spin-on filter, comprises a cylindrical housing, filter paper (i.e., filter layer), a cartridge upper cover, a cartridge lower cover, and a spring that mates with the cartridge lower cover. The utility model patent of the patent number 201080033797.5, entitled filter, also has the above-described structure. The existing filter has the problems that sealing is needed between the upper filter element cover and the shell and between the upper filter element cover and the filter head, and a plurality of sealing structures are needed to be arranged on the upper filter element cover, so that the upper filter element cover is complex in structure and high in manufacturing cost.

Disclosure of Invention

The utility model aims to solve the problem that a plurality of sealing structures are required to be arranged on an upper cover of a filter element.

The utility model provides a filter element with a sealed central tube and a filter device for the technical problems.

The technical scheme of the utility model is as follows:

the utility model provides a filter core of center tube seal, includes shell, upper cover, filter layer, lower cover and center tube, the shell is connected to the upper cover, and filter layer fixed connection upper cover and lower cover respectively set up between upper cover and lower cover, and the upper cover is equipped with the filtration entry, and the center tube is connected the upper cover, and the center tube is provided with the filtration export, and the filtration export is provided with sealing portion, and sealing portion is used for sealing between filter core and the filter head.

Preferably, the filtering outlet extends outwards along the axial direction, and a second filtering layer is arranged in the filtering outlet.

Preferably, the upper cover is provided with a receiving wall protruding axially inwardly.

Preferably, the housing is provided with a positioning portion protruding radially inwards, and the positioning portion is used for limiting the axial position of the upper cover.

Preferably, the upper cover is provided with an internal thread, and a second sealing part for accommodating the sealing element is arranged below the internal thread.

Preferably, a third sealing part for accommodating the sealing element is arranged between the upper cover and the shell.

Preferably, a second filter layer is further included, which is disposed between the filter layer and the center tube or inside the center tube.

Preferably, the upper cover is provided with a limiting part protruding outwards along the radial direction, and the limiting part is used for realizing the positioning of the upper cover by abutting against the positioning part.

A filtering device comprises a filtering head and a filter element, wherein the filtering head is provided with an outlet connecting part and a filter element connecting part, the outlet connecting part is connected with a sealing part, and the filter element connecting part is connected with an upper cover.

Compared with the prior art, the utility model has the following advantages and effects:

by arranging the sealing structure on the central tube, the sealing structure of the upper cover is further reduced, the modeling of the upper cover is simplified, and the manufacturing cost and the manufacturing difficulty are reduced.

Drawings

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

FIG. 1 is a cross-sectional view of example 1;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is another embodiment of the second filter layer of example 1;

FIG. 4 is a partial exploded view of FIG. 3;

fig. 5 is an assembly view of a filter cartridge and filter head.

1-a filter cartridge; 2-a housing; 3-an upper cover; 4-a filter layer; 5-a lower cover;

6, a central tube; 7-a filtration inlet; 8-a filtration outlet; 9-a seal;

10-a containment wall; 11-a positioning part; 12-a second seal; 13-a third seal;

14-a limiting part; 15-sealing the groove; 16-a spring; 17-a second filter layer; 18-a filter head;

19-an outlet connection; 20-filter element connection.

Detailed Description

The present utility model will be described in further detail with reference to the following examples, which are illustrative of the present utility model and are not intended to limit the present utility model thereto.

Example 1: a central tube sealed filter element comprises a shell, an upper cover, a filter layer, a lower cover and a central tube. The housing may be of conventional spin-on filter housing construction, such as a cylindrical housing construction, and may be of any material known in the art, such as aluminum alloy, steel, fiberglass, etc. The filter layer can adopt a medium structure of a conventional spin-on filter, such as a ring shape with a folding structure, which can filter general hydraulic oil, emulsion, water-glycol and other liquids, and can also filter gas, and the material can be selected from the materials of the existing filter paper, such as a porous pad. The upper cover is an open end cover, the lower cover is a closed end cover, and the materials of the upper cover and the lower cover can be selected from the materials of the existing end covers, such as aluminum alloy, hard plastic and the like. The upper cover is fixedly connected with the shell, and the connecting modes are arbitrary, such as welding, bonding, riveting, threaded connection and the like, and because the upper cover and the shell need to be sealed, when the connecting modes which are easy to cause leakage, such as riveting, threaded connection and the like, are selected, the sealing element needs to be additionally arranged, and when the connecting modes which are difficult to cause leakage, such as welding, bonding and the like, are selected, the sealing element does not need to be additionally arranged. The upper cover is provided with a through hole near the shell, the through hole is a filtering inlet, the shape of the filtering inlet is arbitrary, and the filtering inlet is preferably in a conventional shape, such as square and arc. The filter layer is fixedly connected with the upper cover and the lower cover respectively and is arranged between the upper cover and the lower cover, and the filter layer is generally connected with the upper cover and the lower cover into a whole through bonding. The inside of the filter layer is supported by the central tube, the shape of the central tube is matched with the inside of the filter layer, for example, when the inside of the filter layer is cylindrical, the central tube is cylindrical, and for example, when the inside of the filter layer is a rectangular column, the central tube is a rectangular column. The upper part of the central tube is provided with a filtering outlet, the shape of the filtering outlet is arbitrary, the filtering outlet is preferably in a conventional shape, such as a round shape and a square shape, the filtering outlet is provided with a sealing part, and the sealing part can be arranged on the inner side or the outer side, preferably the outer side, of the filtering outlet. The seal is for sealing between the filter cartridge and the filter head. The sealing part has any structure, for example, a boss protruding outwards in the axial direction can be adopted, a groove recessed inwards in the axial direction can be adopted, and a boss protruding outwards in the axial direction or a groove recessed inwards in the oblique direction can be adopted. The seal between the filter cartridge and the filter head may be a disposable seal, such as glue or adhesive, or may be a multiple seal, such as a seal ring or seal block, where the seal portion is typically provided with a groove for receiving the seal member when multiple seals are employed.

In a preferred embodiment, as shown in fig. 1 and 2, the filter cartridge 1 comprises a housing 2, an upper cover 3, a filter layer 4, a lower cover 5 and a central tube 6. The shell 2 is a cylindrical shell, a turned-over edge turned over inwards is arranged at the upper part of the shell 2, a flat plate with a notch is arranged at the bottom of the shell 2, the shell 2 wraps the upper cover 3 through the turned-over edge, the fixing principle is similar to that of an automobile wrapping process, and a positioning part 11 protruding inwards along the radial direction is further arranged at the upper part of the shell. The upper cover 3 is made of aluminum alloy, and although the upper cover 3 is integrally formed, the upper cover can be divided into an annular wall connected with the housing and a bottom plate connected with the annular wall. The part of the lower part of the annular wall protruding from the bottom plate is a receiving wall 10, which serves to receive the filter layer 4. The top of the annular wall is wrapped by the shell 2, an internal thread is arranged on the annular wall, a second sealing part 12 capable of containing a sealing element is arranged below the internal thread, a third sealing part 13 capable of containing the sealing element is arranged on the contact surface of the annular wall and the shell, a limiting part 14 is arranged, the limiting part 14 protrudes outwards in the radial direction, the limiting part 14 can abut against the positioning part 11, and the movement of the upper cover 3 is limited during installation, so that the positioning of the upper cover 3 is completed. The junction of the annular wall and the bottom plate is provided with a plurality of openings at intervals, which are filter inlets 7 for introducing liquid to be filtered from the filter head into the housing 2. The middle part of the bottom plate is a circular opening, a step is arranged at the opening, the bottom plate is bonded with the central tube 6 through the step, and the step can limit the movement of the central tube 6 during installation to finish positioning. The filter layer 4 is adhered to the upper cover 3 and the lower cover 5 by glue, and the central tube 6 is positioned on the inner side of the filter layer 4. The top of the central tube 6 is provided with a circular opening protruding outwards along the axial direction, the opening is a filtering outlet 8, the outer side surface of the filtering outlet 8 is provided with a sealing part 9, the sealing part 9 is provided with a sealing groove 15, and sealing elements can be accommodated in the sealing groove 15. The central tube 6 is provided with a plurality of through holes, liquid to be filtered enters the shell 2 through the filtering inlet 7, is filtered through the filtering layer 4, passes through the central tube 6 after being filtered, and returns to the filtering head through the filtering outlet 8, so that the liquid is filtered. The bottom of the lower cover 5 is supported by a spring 16.

In a preferred embodiment, as shown in fig. 3 and 4, the filter cartridge 1 includes a housing 2, an upper cover 3, a filter layer 4, a lower cover 5, and a center tube 6, and the positioning portion 11, the second sealing portion 12, the third sealing portion 13, the stopper portion 14, and the seal groove 15 are the same in structure as in fig. 2. The shell 2 is a cylindrical shell, a turned-over edge turned over inwards is arranged at the upper part of the shell 2, a flat plate with a notch is arranged at the bottom of the shell 2, the shell 2 wraps the upper cover 3 through the turned-over edge, the fixing principle is similar to that of an automobile wrapping process, and a positioning part 11 protruding inwards along the radial direction is further arranged at the upper part of the shell. The upper cover 3 is made of aluminum alloy, and although the upper cover 3 is integrally formed, the upper cover can be divided into an annular wall connected with the housing and a bottom plate connected with the annular wall. The part of the lower part of the annular wall protruding from the bottom plate is a receiving wall 10, which serves to receive the filter layer 4. The top of the annular wall is wrapped by the shell 2, an internal thread is arranged on the annular wall, a second sealing part 12 capable of containing a sealing element is arranged below the internal thread, a third sealing part 13 capable of containing the sealing element is arranged on the contact surface of the annular wall and the shell, a limiting part 14 protruding outwards in the radial direction is arranged, the limiting part 14 protrudes outwards in the radial direction, the limiting part 14 can abut against the positioning part 11, and the movement of the upper cover 3 is limited during installation, so that the positioning of the upper cover 3 is completed. The junction of the annular wall and the bottom plate is provided with a plurality of openings at intervals, which are filter inlets 7 for introducing liquid to be filtered from the filter head into the housing 2. The middle part of the bottom plate is a circular opening, a step is arranged at the opening, the bottom plate is bonded with the central tube 6 through the step, and the step can limit the movement of the central tube 6 during installation to finish positioning. The filter layer 4 is adhered to the upper cover 3 and the lower cover 5 by glue, and the central tube 6 is positioned on the inner side of the filter layer 4. A second filter layer 17 is arranged between the central tube 6 and the filter layer 4, the second filter layer 17 is sleeved on the central tube 6 through interference fit or is adhered to the upper cover 3 and the lower cover 5 through glue, and the second filter layer 17 is an annular screen, so that liquid can be filtered secondarily, and the filtering effect is further improved. The top of the central tube 6 is provided with a circular opening protruding outwards along the axial direction, the opening is a filtering outlet 8, the outer side surface of the filtering outlet 8 is provided with a sealing part 9, the sealing part 9 is provided with a sealing groove 15, and sealing elements can be accommodated in the sealing groove 15. The central tube 6 is provided with a plurality of through holes, liquid to be filtered enters the shell 2 through the filtering inlet 7, is filtered through the filtering layer 4, passes through the central tube 6 after being filtered, and returns to the filtering head through the filtering outlet 8, so that the liquid is filtered. The bottom of the lower cover 5 is supported by a spring 16.

In a preferred embodiment, the filter insert 1 is essentially identical in construction to the previous embodiment, except that the second filter layer 17 is not located between the central tube 6 and the filter layer 4, but is arranged inside the central tube 6, which is secured by an interference fit with the inner wall of the central tube 6. Or in a preferred embodiment the second filter layer 17 is arranged inside the central tube 6, the second filter layer 17 being a planar filter screen which is glued in one piece with the central tube 6.

The filtering device comprises a filtering head 18 and the filtering core 1 of the filtering device, wherein the filtering head adopts the filtering head structure of the existing spin-on filter, a funnel-shaped outlet connecting part 19 and an externally threaded filtering core connecting part 20 are arranged on the filtering head, the outlet connecting part 19 is connected with a sealing part 9 in a sealing way through a sealing piece, and the filtering core connecting part 20 is connected with an upper cover 3 through threads.

In addition, the specific embodiments described in the present specification may differ in terms of parts, shapes of components, names, and the like. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims (9)

1. The utility model provides a filter core of center tube seal, its characterized in that, includes shell, upper cover, filter layer, lower cover and center tube, the shell is connected to the upper cover, and filter layer fixed connection upper cover and lower cover respectively set up between upper cover and lower cover, and the upper cover is equipped with the filtration entry, and the center tube is connected the upper cover, and the center tube is provided with the filtration export, and the filtration export is provided with sealing part, and sealing part is used for sealing between filter core and the filter head.

2. The center tube sealed filter cartridge of claim 1, wherein the filter outlet extends axially outwardly and a second filter layer is disposed within the filter outlet.

3. A center tube sealed filter cartridge according to claim 1, wherein the upper cover is provided with an axially inwardly projecting receiving wall.

4. A center tube sealed filter cartridge according to claim 1, wherein the housing is provided with a radially inwardly projecting detent for limiting the axial position of the cap.

5. The center tube sealed filter cartridge of claim 1, wherein the upper cap is provided with internal threads, and a second seal portion is provided below the internal threads to receive a seal.

6. The center tube sealed filter cartridge of claim 1, wherein a third seal is provided between the upper cover and the housing to accommodate the seal.

7. The center tube sealed filter cartridge of claim 1, further comprising a second filter layer disposed between the filter layer and the center tube or within the center tube.

8. The center tube sealed filter cartridge of claim 4, wherein the upper cover is provided with a radially outwardly projecting stop portion that positions the upper cover by abutting against a positioning portion.

9. A filter device comprising a filter head and a filter cartridge according to any one of claims 1 to 8, the filter head being provided with an outlet connection and a cartridge connection, the outlet connection being connected to a sealing portion, the cartridge connection being connected to an upper cover.