Detachable self-locking filter element

Abstract

The utility model discloses a detachable self-locking type filter element which comprises a filter cartridge, wherein the filter cartridge is provided with a cavity for accommodating a filter medium and an opening communicated with the cavity; the self-locking assembly is detachably mounted at the opening; the self-locking assembly is provided with an expansion part, and the expansion part can expand in the cavity and is tightly attached to the inner wall of the cavity, so that the self-locking assembly and the filter cartridge are locked mutually. The self-locking assembly is arranged to be matched with the filter cartridge to realize detachable connection, so that secondary disassembly and use are facilitated, the self-locking assembly can be partially inserted into the cavity of the filter cartridge, at least part of the self-locking assembly can expand in the cavity, the expanded part can be tightly attached to the inner wall of the cavity, and the self-locking assembly can be conveniently disassembled and used. Therefore, the self-locking assembly is partially expanded to be locked with the filter cartridge, so that the connection strength between the self-locking assembly and the filter cartridge can be increased after the self-locking assembly and the filter cartridge are matched, the self-locking assembly and the filter cartridge are not easy to separate, the operation mode is simple and convenient, filter element glue is not needed for fixation, and the cost of the filter element is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment and filtration, in particular to a detachable self-locking filter element. Background Art

[0002] Filter element is a commonly used filter material in the field of water treatment. Common filter elements have filter cartridges, in which filter media, such as activated carbon particles, can be placed. Filter cartridges are of single-pass and double-pass types. Taking the double-pass structure as an example, two end caps need to be set at both ends of the filter cartridge. Similarly, the single-pass structure requires an end cap. The end cap can protect the activated carbon particles to ensure the normal filtering performance of the filter element. Usually, the end cap needs to be clamped on the end of the filter cartridge during post-processing, or the filter cartridge can be fixedly connected by applying filter element glue (hot melt glue). The above clamping structure is closed. The connection strength of the filter cartridge is insufficient, and the end cap is likely to fall off during transportation or collision. In the connection method of the sealed filter cartridge with glue, the end cap and the filter cartridge are directly connected and often bonded with hot melt adhesive. The hot melt adhesive is prone to debonding in a high-temperature water flow environment, causing the end cap to separate from the filter cartridge medium, resulting in insufficient filtration effect. The raw water and liquid directly leak out without passing through the filter cartridge. Therefore, it is not suitable for filtering hot water, nor is it conducive to secondary disassembly or use. The operation process is cumbersome and increases the cost of the filter cartridge adhesive. Therefore, there is still room for improvement in the existing filter cartridges. Utility Model Content

[0003] The detachable self-locking filter element of the utility model can effectively solve the problems of complicated sealing methods and insufficient connection strength of the existing filter elements.

[0004] According to one aspect of the utility model, a detachable self-locking filter element is provided, comprising:

[0005] A filter cartridge having a cavity for accommodating a filter medium and an opening communicating with the cavity;

[0006] A self-locking component is detachably mounted at the opening; the self-locking component has an expansion portion, which can expand in the cavity and fit tightly with the inner wall of the cavity, so that the self-locking component and the filter cartridge are locked with each other.

[0007] In some embodiments, the self-locking assembly has a force-applying portion at least partially exposed outside the filter cartridge, and the force-applying portion can indirectly apply force to the expansion portion, so that the expansion portion expands in the cavity. Thus, the self-locking assembly and the filter cartridge are locked with each other in a rotational manner, and the portion of the self-locking assembly exposed outside the filter cartridge is conveniently controlled.

[0008] In some embodiments, the self-locking assembly further comprises an end cap and a pressure rod;

[0009] The end cap is detachably closed on the opening;

[0010] The expansion portion abuts against the end cover and can be inserted into the container;

[0011] One axial end of the compression rod passes through the end cover and can abut against the expansion portion;

[0012] The force applying part is rotatably arranged on the pressure rod;

[0013] The pressure rod is extended and retracted by rotating the force-applying part, and one axial end of the pressure rod abuts against the expansion part, so that the expansion part is deformed and expanded in the cavity to fit closely with the inner wall of the cavity.

[0014] In some embodiments, the end cap includes an extension portion and an abutment portion, the extension portion abuts against the expansion portion and can be inserted into the cavity, and the edge of the filter cartridge is clamped between the extension portion and the abutment portion. Thus, the extension portion can facilitate the insertion of the self-locking component into the filter cartridge, and the abutment portion is used to prevent the self-locking component from over-extending and limit the locking distance of the self-locking component.

[0015] In some embodiments, the inner wall of the cavity is provided with a locking portion, and the expansion portion abuts against the locking portion after deformation and expansion, and the locking portion restricts the expansion portion from detaching toward the outside of the filter cartridge. Thus, the locking portion is used to further increase the connection strength between the self-locking component and the filter cartridge, so that the self-locking component is not easy to detach back and forth after being locked.

[0016] In some embodiments, the filter cartridge has a protrusion, the abutment portion abuts against the protrusion, and the expansion portion extends to the locking portion. Thus, the locking distance of the expansion portion is limited by the abutment portion, which facilitates the manufacturing of the structural position of the locking portion.

[0017] In some embodiments, the force-applying portion is exposed outside the filter cartridge, the force-applying portion is locked on the pressure rod and abuts against the abutting portion, and the expansion portion is deformed and expanded in the cavity. Therefore, when the force-applying portion is gradually locked, it means that one end of the pressure rod abuts against the expansion portion and causes the expansion portion to deform, which facilitates identification of the locking state of the self-locking assembly.

[0018] In some embodiments, a locking ring is provided between the force-applying portion and the abutting portion, and the force-applying portion self-locks on the pressure rod by rotating and squeezing the locking ring, thereby preventing the force-applying portion from detaching or loosening.

[0019] In some embodiments, a pressure handle is provided at one axial end of the pressure rod, and the pressure handle abuts against the expansion portion to cause the expansion portion to deform and expand in all directions.

[0020] Compared with the prior art, the detachable self-locking filter element of the utility model has the following beneficial effects:

[0021] The present application realizes a detachable connection by setting a self-locking component to cooperate with the filter cartridge, thereby facilitating secondary disassembly and use, and the self-locking component can be partially inserted into the cavity of the filter cartridge, at least part of the self-locking component can expand in the cavity, and the expanded part can fit tightly with the inner wall of the cavity. Therefore, the self-locking component partially expands to lock with the filter cartridge, so that the connection strength between the self-locking component and the filter cartridge can be increased after the self-locking component cooperates with the filter cartridge, and it is not easy to separate. The operation method is simple and convenient, and there is no need to use filter cartridge glue to fix it. It can be used for filtering hot water, and it is also beneficial to save the cost of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the detachable self-locking filter element of the utility model;

[0023] Figure 2 This is a structural disassembly diagram of the detachable self-locking filter element of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the self-locking component in the utility model;

[0025] Figure 4 This is a schematic diagram of the self-locking component of the utility model after being locked;

[0026] Figure 5 It is a cross-sectional view of the detachable self-locking filter element of the utility model;

[0027] Figure 6 for Figure 5 Enlarged view of part A.

[0028] In the figure: 1-filter cartridge, 12-cavity, 13-opening, 14-locking portion, 15-protruding portion, 2-self-locking assembly, 21-end cover, 22-expansion portion, 23-pressure rod, 24-force-applying portion, 25-locking ring, 211-extension portion, 212-abutment portion, 231-pressure handle. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] The utility model relates to a detachable self-locking filter element, which has a self-locking component and provides a new closed structure, is suitable for carbon rod filter elements and ceramic filter elements, can place activated carbon particles in the filter cartridge, and can also be directly used in conjunction with the filter element.

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0033] Figure 1 The figure schematically shows a detachable self-locking filter element according to an embodiment of the present invention. Figure 1 As shown, the detachable self-locking filter element includes a filter cartridge 1 and a self-locking component 2.

[0034] like Figure 2 As shown, the filter cartridge 1 is cylindrical in shape and adopts a double-pass or single-pass structure. Taking the single-pass structure as an example, one axial end of the filter cartridge 1 is a closed structure when it is integrally formed, and the interior of the filter cartridge 1 has a cavity 2 for accommodating a filter medium (such as activated carbon particles), or the filter cartridge 1 is directly used as a filter material (filter element), and the other axial end of the filter cartridge 1 has an opening 13 connected to the cavity 2, and the opening 13 can be detachably closed by a self-locking component 2. The filter cartridge 1 has a protrusion 15 at one end close to the opening 13, which is an upper protrusion structure on the surface of the filter cartridge 1.

[0035] like Figure 3 As shown, the self-locking component 2 is detachably mounted at the opening 13. Preferably, the self-locking component 2 can be snapped into the opening 13, and then further locked by the self-locking function of the self-locking component 2 to increase the connection strength between the two. Specifically, the self-locking component 2 includes an end cap 21, an expansion portion 22, a pressure rod 23, and a force-applying portion 24.

[0036] The end cap 21 is the main body part of the closed opening 13, which is installed at the opening 13, and has a cylindrical structure with a stepped platform. The end cap 21 includes an extension portion 211 and an abutment portion 212. The extension portion 211 is a metal cylindrical structure, and its axial length is greater than the axial length of the abutment portion 212. When used, it needs to be inserted into the opening 13 and transitionally matched with the inner wall of the cavity 2, which has the function of strengthening the supporting strength of the filter cartridge 1. Preferably, the extension portion 211 is snap-fitted with the inner wall of the cavity 2; the abutment portion 212 and the extension portion 211 are integrally formed, and the axial lengths of the two are different. The diameter of the abutment portion 212 is greater than the diameter of the extension portion 211, so that The end cover 21 has a stepped structure, so when the extension portion 211 is inserted into the cavity 2 through the opening 13, the abutment portion 212 abuts against the end surface of the filter cartridge 1 and is exposed outside the filter cartridge 1 to prevent the extension portion 211 from being excessively inserted into the cavity 2 while protecting the end surface of the filter cartridge 1. The protruding portion of the abutment portion 212 can completely wrap the end of the filter cartridge 1 close to the opening 13. It can be understood that the edge of the filter cartridge 1 is clamped in the gap formed between the extension portion 211 and the abutment portion 212, which can prevent the filter cartridge 1 from being deformed under the action of the internal expansion force and can ensure that the filter cartridge 1 avoids leakage of raw water / raw liquid during gas-liquid filtration.

[0037] The expansion portion 22 is made of a soft deformable material, such as rubber or silicone. The expansion portion 22 is an elastic gasket, which abuts against one end of the end cover 21 and can be inserted into the cavity 2 with the end cover 21. It is the part of the self-locking component 2 that expands. Specifically, the expansion portion 22 is wrapped around one axial end of the extension portion 211, and its diameter is slightly larger than the diameter of the extension portion 211, or a portion of the expansion portion 22 is arranged in the extension portion 211, and the other portion exposed outside the extension portion 211 can be deformed. In this embodiment, a portion of the expansion portion 22 is wrapped around the circumferential surface of the extension portion 211, and the other portion is exposed at one axial end of the extension portion 211, which is used to deform and expand so as to fit closely with the inner wall of the cavity 2, that is, the expansion portion 22 is the part of the self-locking component 2 that can at least deform and expand in the cavity 12.

[0038] The pressure rod 23 has a "T"-shaped structure. The pressure rod 23 passes through the end cover 21 so that both axial ends of the pressure rod 23 are exposed outside the end cover 21. The pressure rod 23 has a threaded rod and a pressure handle 231. The threaded rod is partially exposed to the outside of the self-locking component 2 during actual use. The pressure handle 231 is arranged at one axial end of the pressure rod 23 and adopts a closed circular structure. Its thickness is less than the thickness of the expansion part 22, and the diameter of the pressure handle 231 is adapted to the inner diameter of the expansion part 22, so that the expansion part 22 can deform and expand. The pressure handle 231 can also be inserted into the cavity 2 with the end cover 21. Therefore, before use, the pressure handle 231 can be at one axial end of the expansion part 22 and maintain a gap.

[0039] The force-applying portion 24 is at least partially exposed outside the filter cartridge 1. The force-applying portion 24 has a structure similar to that of a nut, and has a thread inside that matches the pressure rod 23. It is a structure that is easy to screw and is not easy to reverse and slip under pressure. Of course, it can also be achieved by directly using a nut, as long as the pressure rod 23 has a threaded rod for threaded cooperation. The force-applying portion 24 moves relative to the pressure rod 23 through rotation, so that the pressure rod 23 can be telescopically moved relative to the filter cartridge 1. When in use, the force-applying portion 24 is exposed outside the filter cartridge 1 (as the portion exposed outside the filter cartridge 1), and the force-applying portion 24 is locked on the pressure rod 23 and abuts against the abutment portion 212, so that the pressure handle 231 squeezes and abuts against the inside of the expansion portion 22, and the expansion portion 22 deforms around it and expands in the cavity 2, that is, force is indirectly applied to the expansion portion 22 through the pressure rod 23. In other embodiments, the force-applying portion 24 is a nut and a portion of the pressure rod 23 exposed outside the filter cartridge 1. The force-applying portion 24 may be a structure integrally connected to the pressure rod 23, and force is directly applied to the expansion portion 22 by pulling along the axial direction of the filter cartridge 1, so that the pressure handle 231 applies force to the expansion portion 22.

[0040] Furthermore, a locking ring 25 is provided between the force-applying portion 24 and the abutting portion 212. The locking ring 25 is a gasket, and two of them are provided. The locking ring 25 is used to prevent the force-applying portion 24 from loosening after the force-applying portion 24 is locked so as to improve the strength of self-locking, that is, the force-applying portion 24 rotates to gradually approach and squeeze the locking ring 25 to self-lock on the pressure rod 23. In other embodiments, the locking ring 25 can be another nut, that is, the locking effect of the self-locking assembly 2 is more perfect through two nuts.

[0041] Working principle: When in use, adjust the force-applying part 24 to the state where the pressing handle 231 is disengaged (keeping a gap with the expansion part 22), and then gradually insert the self-locking component 2 into the cavity 2 through the opening 13 until the abutting part 212 abuts against the end surface of the filter cartridge 1. Figure 4 and Figure 5As shown, at this time, the force-applying part 24 is screwed to gradually approach the locking ring 25, and the pressure rod 23 is telescopically moved relative to the cavity 2, so as to drive the pressure handle 231 to gradually approach and abut against the expansion part 22, and the force-applying part 24 is locked on the threaded rod of the pressure rod 23 through the locking ring 25, and the pressure handle 231 is squeezed and abutted against the inside of the expansion part 22, and the expansion part 22 expands and deforms in all directions, so that the deformed expansion part 22 is closely fitted with the inner wall of the cavity 2, so that the self-locking component 2 and the filter cartridge 1 are locked with each other. It can be seen that the self-locking component 2 further improves the connection strength between the self-locking component 2 and the filter cartridge 1 through the expansion part 22, and it is not easy to detach, and the detachable locking method is simple and convenient to operate, and there is no need to use filter element glue to fix it, which is suitable for filtering hot water. For example, the conventional filter element using glue is generally suitable for filtering at a temperature of about 0-45°C, and the use temperature of the self-locking filter element of the present application can be expanded to about 0-75°C, so the use temperature environment range is greatly improved, which is also conducive to saving the cost of the filter element.

[0042] In some embodiments, Figure 6 As shown, a locking portion 14 is provided on the inner wall of the cavity 2. The locking portion 14 is a groove on the inner wall of the cavity 2. For example, it can be set as a circular groove structure to adapt to the shape of the expansion portion 22. When the expansion portion 22 is deformed and expanded by the pressure handle 231, its expanded part can abut against the groove to form a clamping effect with the groove. At this time, due to the effect of the groove, the expansion portion 22 can be limited to be separated from the outside of the filter cartridge 1, so as to further improve the locking effect of the self-locking component 2. In addition, the distance between the groove and the end face of the filter cartridge 1 is equal to the distance between the expansion portion 22 and the abutting portion 212. When constructing the groove, the width of the expansion portion 22 can be referred to. The design distance of the groove can be taken as a reference by the distance between the expansion portion 22 and the abutting portion 212, which is convenient for post-processing to construct the structure of the groove, and can further ensure the position of the expansion portion 22 abutting and locking after deformation.

[0043] Furthermore, the abutment portion 212 can abut against the protrusion 15. When the self-locking assembly 2 gradually extends to the cavity 12, the abutment portion 212 abuts against the protrusion 15, and the expansion portion 22 is just at the locking portion 14. The protrusion 15 can conveniently limit the extension position of the abutment portion 212 and conveniently construct the position of the locking portion 14.

[0044] In other embodiments, the locking portion 14 can be constructed as a ridge structure on the inner wall of the cavity 2. Similar to the above embodiment, the difference is that the distance between the ridge structure and the filter end surface needs to be smaller than the distance between the expansion portion 22 and the abutment portion 212, so that after the expansion portion 22 is deformed, the ridge structure can abut against the deformed part of the expansion portion 22 to limit the self-locking assembly 2 from disengaging. Alternatively, the above two locking portions 14 with different structures are provided at the same time.

[0045] In other embodiments, the pressure rod 23 can be pulled out to move relative to the cavity 12, so as to drive the pressure handle 231 to squeeze and abut against the inside of the expansion portion 22, so that the expansion portion 22 is deformed, and the portion of the pressure rod 23 exposed outside the filter cartridge 1 can abut against the end surface of the filter cartridge 1 to lock the pressure rod 23, so that the expansion portion 22 remains deformed, and a self-locking effect can also be achieved.

[0046] The above description is only a preferred embodiment of the present invention. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. This does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A detachable self-locking filter element, characterized in that: include: A filter cartridge having a cavity for accommodating a filter medium and an opening communicating with the cavity; A self-locking component is detachably mounted at the opening; the self-locking component has an expansion portion, which can expand in the cavity and fit tightly with the inner wall of the cavity, so that the self-locking component and the filter cartridge are locked with each other.

2. The detachable self-locking filter element according to claim 1, characterized in that: The self-locking assembly has a force-applying portion at least partially exposed outside the filter cartridge, and the force-applying portion can indirectly apply force to the expansion portion, so that the expansion portion expands in the cavity.

3. The detachable self-locking filter element according to claim 2, characterized in that: The self-locking assembly also includes an end cover and a pressure rod; The end cap is detachably closed on the opening; The expansion portion abuts against the end cover and can be inserted into the container; One axial end of the compression rod passes through the end cover and can abut against the expansion portion; The force applying part is rotatably arranged on the pressure rod; The pressure rod is extended and retracted by rotating the force-applying part, and one axial end of the pressure rod abuts against the expansion part, so that the expansion part is deformed and expanded in the cavity to fit closely with the inner wall of the cavity.

4. The detachable self-locking filter element according to claim 3, characterized in that: The end cover comprises an extension portion and an abutment portion, the extension portion abuts against the expansion portion and can be inserted into the cavity, and the edge of the filter cartridge is clamped between the extension portion and the abutment portion.

5. The detachable self-locking filter element according to claim 4, characterized in that: The inner wall of the cavity is provided with a locking portion, and the expansion portion abuts against the locking portion after the expansion portion is deformed and expanded, and the locking portion restricts the expansion portion from being separated from the outside of the filter cartridge.

6. The detachable self-locking filter element according to claim 5, characterized in that: The filter cartridge has a protrusion, the abutting portion abuts against the protrusion, and the expansion portion extends to the locking portion.

7. The detachable self-locking filter element according to claim 4, characterized in that: The force-applying portion is rotatably exposed outside the filter cartridge, the force-applying portion is locked on the pressure rod and abuts against the abutting portion, and the expansion portion is deformed and expanded in the cavity.

8. The detachable self-locking filter element according to claim 7, characterized in that: A locking ring is provided between the force-applying portion and the abutting portion, and the force-applying portion self-locks on the pressure rod by rotating and squeezing the locking ring.

9. The detachable self-locking filter element according to claim 3, characterized in that: A pressure handle is provided at one axial end of the pressure rod, and the pressure handle abuts against the expansion portion so that the expansion portion expands in all directions and deforms.

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