Assembled filter element with replaceable filter layer

Abstract

The utility model discloses an assembly type filter element with replaceable filter layers, the whole assembly type filter element is tubular, the assembly type filter element comprises a central hole and at least two replaceable filter layers which are sequentially and coaxially arranged from inside to outside in the circumferential direction of the central hole, a through hole is coaxially formed in each filter layer, and a through hole is formed between every two adjacent filter layers. The filter layer located on the inner layer just penetrates into the through hole of the filter layer located on the outer layer, so that the filter layers are matched in a penetrating and inserting mode, plastic rings are fixedly arranged at the same ends of the filter layers, and at least one plug hole is formed in each plastic ring. According to the scheme, the utilization rate of the filter element is increased, the service life of the filter element is prolonged, the use cost of the filter element is reduced, the filter element is particularly suitable for an expensive functional filter layer and a filter layer with higher filter precision, the use flexibility of the filter element is improved, and rapid and stable replacement of the filter layer is realized through the plastic ring arranged at the end part of each filter layer.

Description

Technical Field

[0001] The utility model relates to the field of filter elements, in particular to an assembled filter element with a replaceable filter layer. Background Art

[0002] The filter element is a purification device that purifies and reuses original ecological resources through filtration. Gas or liquid (including water, oil, etc.) passes through the filter element, intercepting unnecessary impurities, thereby separating the gas or liquid required for industrial production or daily life after purification. During long-term use, the intercepted impurities are usually trapped inside the filter layer of the filter element, which leads to clogging of the filter element, and the filtration flux of the filter element gradually decreases, affecting the filtration efficiency. Therefore, the existing solution is that after the filter element has been used for a period of time, if the filter element is clogged, it is necessary to replace the entire filter element with a new one. In particular, in the case of some large-scale liquid filtration treatment, once the filtration effect is below the standard, the entire filter element needs to be replaced.

[0003] However, in the high-flux filtration scenario, the replacement frequency of the filter element increases. Therefore, in some existing technologies, the filter element part is replaced so that the filter element frame, end cover and other supporting accessories can be reused. For example, the utility model patent with authorization announcement number CN209989340U provides a natural gas separation filter element with replaceable filter material, which includes a sealing ring, an end cover, a supporting frame, a filter material layer, a pre-filter layer, and a bottom end cover. A filter material layer is arranged on the outside of the supporting frame, a pre-filter layer is arranged below the filter material layer, a bottom end cover is arranged below the pre-filter layer, an end cover is arranged on the upper surface of the filter material layer, and a sealing ring is arranged on the upper surface of the end cover. The filter material part of the separation filter element is made replaceable, and each time the filter material part is replaced, other accessories can be reused.

[0004] However, the above structure still completely replaces all the filter materials of the entire filter element. In actual applications, impurities within a certain size range intercepted in the filter element will be relatively concentrated in a filter layer with a filtration accuracy corresponding to the impurity particle size. In a certain specific environment, the particle size of the impurities is usually relatively concentrated. At this time, one filter layer of the filter element will be blocked while other filter layers can accommodate very few impurities. If a traditional filter element is used, the entire filter element needs to be replaced as long as there are too many impurities in a certain filter layer. For large filter elements, especially composite filter elements with multiple filter layers with different filtration accuracy or expensive functional filter layers, frequent replacement of the entire filter element due to the blockage of a certain filter layer is a great waste. Utility Model Content

[0005] Therefore, in order to solve the above problems, the utility model provides an assembled filter element with a replaceable filter layer.

[0006] The utility model is realized by the following technical solutions:

[0007] A filter element with replaceable filter layers, which is tubular as a whole and comprises a central hole and at least two replaceable filter layers coaxially arranged in sequence from the inside to the outside along the circumference of the central hole, wherein each filter layer is coaxially provided with a through hole, and between two adjacent filter layers, the filter layer located in the inner layer just penetrates into the through hole of the filter layer located in the outer layer, so that the filter layers are interlaced and matched, and at least one filter layer comprises an inner filter layer and a filter cloth wrapped around the outer periphery of the inner filter layer, and the filtering accuracy of the inner filter layer is greater than or equal to the filtering accuracy of the filter cloth wrapped around its outer periphery, and each filter layer is fixedly provided with a plastic ring at the same end, and the plastic ring at the end of each filter layer is coaxially arranged with the corresponding filter layer, and each of the plastic rings is provided with at least one plug hole, and the hole axis of each plug hole is parallel to the axis of the central hole and opens at the end face of the plastic ring.

[0008] Preferably, the inner filter layer is a melt-blown filter layer, and the filter cloth is a PP non-woven fabric wrapped around the periphery of the melt-blown filter layer.

[0009] Preferably, the thickness D2 of the plastic ring is less than or equal to the thickness D1 of the corresponding filter layer.

[0010] Preferably, the plastic ring is fixed to the end of the filter layer by a screw, wherein a portion of the screw is disposed in the plug hole and another portion is inserted into the filter layer, and a plug space is left between the opening of the plug hole and the nut of the screw.

[0011] Preferably, the outer periphery of the bolt of each screw is provided with a self-tapping thread.

[0012] Preferably, an internal thread is provided on the hole wall of each of the bolt holes, and the internal threads of multiple bolt holes on the same plastic ring are the same.

[0013] Preferably, the plug holes on each plastic ring are arranged at equal angles along the inner ring of the plastic ring where the plug holes are located.

[0014] Preferably, the filtering accuracy of each filter layer increases or decreases from the inside to the outside.

[0015] The beneficial effects of the technical solution of the utility model are mainly reflected in:

[0016] 1. Each filter layer of the filter element can be replaced. When one or more filter layers of the filter element need to be replaced, there is no need to replace the entire filter element. Only the replacement filter layer needs to be taken out and replaced, which increases the utilization rate of the filter element and extends the service life of the filter element, reducing the use cost of the filter element. At the same time, according to different filtering needs, filter layers with different filtering functions and filtering accuracies can be replaced, so that the same filter element has different filtering functions, improving the flexibility of filter element use, and realizing the rapid replacement of filter layers through the plastic ring set at the end of each filter layer. The structure is simple and easy to replace, which improves the replacement efficiency.

[0017] 2. The thickness of each filter layer is greater than or equal to the thickness of the corresponding plastic ring. Therefore, an annular gap is formed between the plastic rings to facilitate the withdrawal of the filter layer. At the same time, since the plastic ring and the corresponding filter layer are concentrically arranged, when the filter layer is gradually screwed out from the bottom, there are gaps between the plastic ring and the filter layers on both sides. Therefore, no interference will be formed when the filter layer is withdrawn, thereby realizing rapid replacement of the filter layer.

[0018] 3. A plug space is reserved at the top of the screw in the plug hole, so that when the filter layer needs to be replaced, the filter layer can be slowly screwed out through the plug. In a preferred embodiment, the plug hole is also uniformly provided with an internal thread, and a bolt that matches the internal thread can be used to strengthen the tightness of the plug hole, thereby ensuring stable removal and assembly of the filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the working state of the assembled filter element and the plug handle of the replaceable filter layer;

[0020] Figure 2 It is a cross-sectional view and a partial enlarged view of an assembled filter element with replaceable filter layers;

[0021] Figure 3 is a schematic diagram of the process of removing the filter layer B in one embodiment;

[0022] Figure 4 FIG. 1 is a schematic diagram of the assembly process of the filter layer V in one embodiment. DETAILED DESCRIPTION

[0023] In order to make the purpose, advantages and features of the utility model more clearly and in detail, the following preferred embodiments are illustrated and explained through non-limiting descriptions. This embodiment is only a typical example of the application of the technical solution of the utility model. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the utility model.

[0024] At the same time, it is stated that in the description of the scheme, it should be noted that the directions or positional relationships indicated by the terms "center", "up", "down", "left", "right", "front", "back", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0025] In addition, the terms "first" and "second" in this solution are only used for descriptive purposes and cannot be understood as indicating or implying the order of importance, or implicitly indicating the number of technical features shown. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In this utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] The utility model discloses an assembled filter element with replaceable filter layers, such as Figure 1 , Figure 2 As shown, the whole is tubular, including a central hole 1, and at least two layers of replaceable filter layers 2 coaxially arranged from the inside to the outside along the circumference of the central hole 1, each filter layer 2 is coaxially provided with a through hole, and between two adjacent filter layers 2, the filter layer 2 located in the inner layer just penetrates into the through hole of the filter layer 2 located in the outer layer, so that the filter layers 2 are interlaced and matched, thereby ensuring that the filter layer 2 can move along the axial direction, thereby realizing the removal and replacement of the filter layer.

[0027] Among them, at least one filter layer 2 includes an inner filter layer and a filter cloth wound and wrapped around the outer periphery of the inner filter layer, the filtering accuracy of the inner filter layer is greater than or equal to the filtering accuracy of the filter cloth wrapped around its outer periphery, wherein the wrapping direction of the filter cloth in each filter layer 2 is consistent, and when the filter layer 2 is taken out and replaced, it is slowly screwed out / in along the axis in the direction consistent with the wrapping direction of the external filter cloth, such as: when the wrapping direction of the filter cloth is clockwise, when the filter layer 2 needs to be taken out, the filter layer 2 is rotated clockwise when taken out and gradually screwed out along the axis; when a new filter layer 2 needs to be replaced, the new filter layer 2 also needs to be gradually screwed in along the clockwise direction, so as to avoid the filter cloth wrapped outside the filter layer 2 from spreading out during the disassembly and installation process; in addition, the number of wrapping circles of the filter cloth is at least two circles. In actual applications, the number of wrapping circles of the filter cloth can be adjusted according to needs, which will not be repeated here.

[0028] In some embodiments, the filtering accuracy of each filter layer 2 increases from the inside to the outside. In other embodiments, the filtering accuracy of each filter layer 2 decreases from the inside to the outside. The gradual setting of the filtering accuracy of the filter element can ensure high-precision filtration while ensuring efficient filtration. At the same time, the different filtering accuracy direction settings of the filter element can be adjusted according to actual needs, which will not be elaborated here.

[0029] In some other embodiments, the inner filter layer of each filter layer 2 and the specific material and filtering accuracy of the filter cloth can be adjusted according to actual needs. In a preferred embodiment, the inner filter layer is a meltblown filter layer, and the filter cloth is a PP non-woven fabric wrapped around the periphery of the meltblown filter layer. In other embodiments, the inner filter layer can also be replaced with other functional filter materials to meet specific filtering needs, which will not be elaborated here.

[0030] Each filter layer 2 is fixedly provided with a plastic ring 3 at the same end. The plastic ring 3 at the end of each filter layer 2 is coaxially arranged with the corresponding filter layer 2. Each of the plastic rings 3 is provided with at least one bolt hole 301. In one embodiment, the bolt holes 301 on each plastic ring 3 are arranged at equal angles along the inner ring of the plastic ring 3 where they are located. The number and position of the bolt holes 301 on different plastic rings 3 can be adjusted according to actual needs and are not elaborated here. The hole axis of each bolt hole 301 is parallel to the axis of the center hole 1 and is open at the end face of the plastic ring 3.

[0031] like Figure 1 , Figure 3 , Figure 4 As shown, in actual application, a plug handle 5 matching each plastic ring 3 can also be used, and the bottom of the plug handle 5 is provided with a plug 501 matching the number, position and diameter of the plug holes 301 on the corresponding plastic ring 3, and the length of the plug 501 is preferably 2 / 3 of the total length of the filter element; Figure 3 , Figure 4As shown, the filter element includes filter layers A, B, and C. When it is necessary to take out one of the filter layers 2 (as shown in FIG. 3 , filter layer B is taken out at this time), each plug 501 at the bottom of the plug handle 5 is inserted into the corresponding plug hole 301 on the plastic ring 3, and the filter layer 2 is gradually screwed out downward along the wrapping direction of the filter cloth outside the filter layer 2 (clockwise). When the screwed-out length of the filter layer B exceeds two-thirds of the total length, the plug handle 5 is removed, and the plug 501 on the plug handle 5 is inserted into a new filter layer V. Then, the filter layer V is gradually screwed in from the top in a clockwise direction, and the bottom of the filter layer V is in contact with the top of the filter layer B. After the filter layer V is completely screwed in, the old filter layer B leaves the filter element. The above replacement method can ensure that the old filter layer B plays a positioning role between the filter layer A and the filter layer C before the filter layer V is fully assembled. In addition, the removed filter layer B can also be recycled and reused after removal and cleaning, thereby avoiding waste of resources.

[0032] The plastic ring 3 and the filter layer 2 can be connected in a variety of ways, such as glue fixation. In one embodiment, the plastic ring 3 and the end of the filter layer 2 are fixed by screws 4, wherein a portion of the screw 4 is disposed in the plug hole 301, and another portion is inserted into the filter layer 2. A plug space is left between the opening of the plug hole 301 and the nut of the screw 4, so that the plug 501 at the bottom of the plug handle 5 is inserted into the plug space, such as Figure 2 As shown, in a preferred embodiment, a self-tapping thread 401 is provided on the outer circumference of each screw 4 .

[0033] In a preferred embodiment, an internal thread is provided on the hole wall of each of the bolt holes 301, and the internal threads of multiple bolt holes 301 on the same plastic ring 3 are the same. Specifically, an external thread matching the internal thread can also be provided on the outer peripheral surface of the bolt 501 at the bottom of the bolt handle 5. When the bolt 501 is inserted into the bolt hole 301, the internal thread and the external thread are matched and fixed by screwing, so that the bolt handle 5 is fixed to the plastic ring 3 at the end of the filter layer 2, thereby ensuring the stability of the filter layer 2 when it is taken out and replaced.

[0034] In one embodiment, the thickness D2 of the plastic ring 3 is less than or equal to the thickness D1 of the corresponding filter layer, so that there is a gap between two adjacent plastic rings 3, thereby facilitating the removal and screwing in of the filter layer 2.

[0035] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. Assembled filter element with replaceable filter layer, characterized by: The whole is tubular, including a central hole, and at least two replaceable filter layers coaxially arranged from the inside to the outside along the circumference of the central hole. A through hole is coaxially arranged in each filter layer. Between two adjacent filter layers, the filter layer located in the inner layer just penetrates into the through hole of the filter layer located in the outer layer, so that the filter layers are interlaced and matched. At least one filter layer includes an inner filter layer and a filter cloth wrapped around the outer periphery of the inner filter layer. The filtering accuracy of the inner filter layer is greater than or equal to the filtering accuracy of the filter cloth wrapped around its outer periphery. Each filter layer is fixedly provided with a plastic ring at the same end. The plastic ring at the end of each filter layer is coaxially arranged with the corresponding filter layer. Each of the plastic rings is provided with at least one plug hole. The hole axis of each plug hole is parallel to the axis of the central hole and opens at the end face of the plastic ring.

2. The assembled filter element with replaceable filter layer according to claim 1, characterized in that: The inner filter layer is a melt-blown filter layer, and the filter cloth is a PP non-woven fabric wrapped around the outer periphery of the melt-blown filter layer.

3. The assembled filter element with replaceable filter layer according to claim 1, characterized in that: The thickness D2 of the plastic ring is less than or equal to the thickness D1 of the corresponding filter layer.

4. The assembled filter element with replaceable filter layer according to claim 1, characterized in that: The plastic ring is fixed to the end of the filter layer by screws, part of the screw is arranged in the plug hole, and the other part is inserted into the filter layer, and a plug space is left between the opening of the plug hole and the nut of the screw.

5. The assembled filter element with replaceable filter layer according to claim 4, characterized in that: Each screw is provided with self-tapping threads on the outer circumference of the bolt.

6. The assembled filter element with replaceable filter layer according to claim 1, characterized in that: An internal thread is arranged on the hole wall of each bolt hole, and the internal threads of multiple bolt holes on the same plastic ring are the same.

7. The assembled filter element with replaceable filter layer according to claim 1, characterized in that: The bolt holes on each plastic ring are arranged at equal angles along the inner ring of the plastic ring where it is located.

8. The assembled filter element with replaceable filter layer according to claim 1, characterized in that: The filtering accuracy of each filter layer increases or decreases from the inside to the outside.

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