Composite filter element with high adsorbability

Abstract

The utility model discloses a composite filter element with high adsorbability, which comprises a cylindrical filter element body, the filter element body comprises a melt-blowing filter element layer and a folding filter element layer coaxially arranged on the periphery of the melt-blowing filter element layer, the melt-blowing filter element layer is hollow, end covers are symmetrically arranged at two ends of the filter element body, and the folding filter element layer is arranged on the periphery of the melt-blowing filter element layer. The filtering precision of the melt-blown filter element layer is greater than that of the folded filter element layer. The scheme has the characteristics of excellent dirt holding capacity, large filtering area and high filtering efficiency of the folded filter element layer and the characteristics of high filtering precision and adsorbability of the melt-blown filter element, large-particle impurities can be conveniently blocked on the outer layer, blockage is avoided, meanwhile, the pressure resistance is improved through the end cover and the stainless steel filter screen, and the service life of the filter element is prolonged. And the fiber yarn structure adopted by the melt-blown filter element layer has high adsorbability and high void ratio, so that the integral assimilative capacity and adsorbability of the filter element are further improved.

Description

Technical Field

[0001] The utility model relates to the field of fluid filtration, in particular to a composite filter element with high adsorption. Background Art

[0002] With the development of the filtration industry, the requirements for the filtration accuracy, filtration efficiency, dirt holding capacity and compressive strength of the filter element have also increased. Among various types of filter element products, the pleated filter element has the characteristics of large filtration area and strong dirt holding capacity. Most of the pleated filter elements on the market are single-layer pleated filter elements. In order to improve the adsorption performance and filtration accuracy, some pleated filter elements use double-layer pleated filter elements. For example, the utility model patent with the authorization announcement number CN201632106U provides a double-layer composite pleated filter element, including a cylindrical coarse filter pleated filter element body and a fine filter pleated filter element body that are sequentially mounted from the outside to the inside. However, the pleated filter element is easy to spread out when the pressure is high, and although the pleated filter element has good dirt holding capacity, the adsorption and filtration accuracy need to be further improved. When the fluid passes through the first layer of the pleated filter element, the impurities are already less and the impurity particles are extremely small, so a filter element with higher adsorption and filtration accuracy is required for secondary filtration. The meltblown filter element is a tubular filter element made of non-toxic and odorless polypropylene particles through heating, melting, spinning, pulling, and forming. It has strong adsorption, filtration accuracy and dirt holding capacity, but the meltblown filter element is directly formed by pulling the fiber filaments, and its pressure resistance is poor. Therefore, in the prior art, referring to the utility model patent with authorization announcement number CN219050513U, it is usually necessary to set protective parts such as protective sleeves or protective nets outside the meltblown filter element, which will limit the shape and volume of the filter element to a certain extent. At the same time, although the meltblown filter element has extremely high filtration accuracy, its pores are small, and it is easy to get blocked when there are too many impurities. Utility Model Content

[0003] Therefore, in order to solve the above problems, the utility model provides a composite filter element with high adsorption.

[0004] The utility model is realized by the following technical solutions:

[0005] A composite filter element with high adsorption, comprising a cylindrical filter element body, the filter element body comprising a meltblown filter element layer and a folded filter element layer coaxially arranged on the periphery of the meltblown filter element layer, the meltblown filter element layer is hollow, comprising a central hole penetrating the middle of the meltblown filter element layer, the central hole is coaxial with the filter element body, and both ends are open, end caps are symmetrically arranged at both ends of the filter element body, the two end caps are respectively provided with through holes, the through holes are communicated with the openings at both ends of the central hole, and the inner side surfaces of the two end caps are integrally provided with a tubular limit card along the periphery of the through hole Buckle, the limit buckle is vertically arranged on the inner side surface of the end cover and extends into the center hole from the openings at both ends of the center hole, the limit buckle is coaxially arranged with the center hole and its outer diameter is the same as the aperture of the center hole, so that the limit buckle is engaged with the center hole, and the outer periphery of the two end covers is also respectively provided with a circle of cover eaves, the cover eaves are perpendicular to the inner side surface of the end cover and the inner diameter of the cover eaves is the same as the outer diameter of the folded filter core layer, the cover eaves are sleeved on both ends of the outer peripheral surface of the folded filter core layer, and the filtration accuracy of the meltblown filter core layer is greater than the filtration accuracy of the folded filter core layer.

[0006] Preferably, a filter screen is also provided on the periphery of the folded filter core layer, and the filter screen is a stainless steel filter screen.

[0007] Preferably, both ends of the stainless steel filter screen are connected to the cover ridges of the end covers at both ends of the filter element body.

[0008] Preferably, the two ends of the stainless steel filter screen are connected to the cover brims of the end covers at both ends of the filter element body by glue or welding.

[0009] Preferably, the thickness of the pleated filter core layer is greater than the thickness of the meltblown filter core layer.

[0010] Preferably, an annular sealing groove body is further provided on the inner side surface of the end cover, and a sealing rubber ring is provided in the sealing groove body.

[0011] Preferably, the melt-blown filter layer is a PP fiber melt-blown filter layer, a PET fiber melt-blown filter layer, a PA6 fiber melt-blown filter layer or a PA66 fiber melt-blown filter layer.

[0012] Preferably, the fiber monofilament fineness of the meltblown filter layer is 1 denier to 20 deniers.

[0013] Preferably, the fiber filaments of the meltblown filter layer have a tooth-groove structure formed on the periphery of the cross section, including tooth portions 10 and groove portions 11 arranged at intervals, and the number of tooth portions 10 of the fiber filaments is 3-12 teeth.

[0014] Preferably, the meltblown filter layer comprises fiber filaments with different numbers of teeth 10 and lengths of teeth 10 .

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

[0016] 1. The filter element body includes a meltblown filter element layer and a pleated filter element layer from the inside to the outside. The pleated filter element layer has a higher compressive strength than the meltblown filter element layer. The end cap and the stainless steel filter mesh can further increase the compressive resistance to prevent the outer pleated filter element from spreading. The composite filter element with high adsorption disclosed by the utility model has the characteristics of excellent dirt holding capacity, large filtration area and high filtration efficiency of the pleated filter element, as well as the characteristics of high filtration accuracy and adsorption of the meltblown filter element, which is convenient for blocking larger particles of impurities in the outer layer to avoid clogging. At the same time, both the pleated filter element layer and the meltblown filter element layer have high adsorption, thereby further improving the overall adsorption performance of the filter element.

[0017] 2. The meltblown filter core layer is made of fiber filaments with a tooth-groove structure formed on the periphery of the cross section. The tooth-groove structure of the fiber filaments can help to absorb dirt, thereby further improving the adsorption of the meltblown filter core layer. At the same time, the meltblown filter layer contains fiber filaments with different numbers and lengths of teeth, which can avoid the tooth-groove meshing between fiber filaments with the same shape of tooth-groove structure and reduce the impurity accommodating space between the filaments, thereby ensuring that the porosity of the meltblown filter core layer is maximized, further improving the dirt-absorbing capacity and adsorption performance, and avoiding filter clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of a composite filter element with high adsorption;

[0019] Figure 2 yes Figure 1 A magnified view of part A;

[0020] Figure 3 It is a schematic diagram of the structure of a composite filter element with high adsorption;

[0021] Figure 4 It is a plurality of embodiments of the cross-sectional shape of the fiber filaments used in the melt-blown filter element layer in the composite filter element with high adsorption;

[0022] Figure 5 It is a schematic diagram comparing the cross-sectional combination states of the fiber filaments used in the melt-blown filter core layer when the tooth-groove structures are the same and when the tooth-groove structures are different. 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 a composite filter element with high adsorption, such as Figure 1-Figure 3 As shown, it includes a cylindrical filter element body, the filter element body includes a meltblown filter element layer and a folded filter element layer coaxially arranged on the periphery of the meltblown filter element layer, the meltblown filter element layer is hollow, and includes a center hole penetrating the middle of the meltblown filter element layer, the center hole is coaxial with the filter element body, and both ends are open for conveying fluid, and end caps are symmetrically arranged at both ends of the filter element body, and through holes are respectively arranged on the two end caps, the through holes are communicated with the openings at both ends of the center hole, and the inner side surfaces of the two end caps are along the outer side of the through hole. A tubular limiting buckle is integrally arranged around the circumference, and the limiting buckle is vertically arranged on the inner side surface of the end cover and extends into the center hole from the openings at both ends of the center hole. The limiting buckle is coaxially arranged with the center hole and its outer diameter is the same as the aperture of the center hole, so that the limiting buckle is engaged with the center hole. On the one hand, it is used to fix the end cover to the two ends of the filter element, and on the other hand, the limiting buckle abuts against the center hole. At this time, the through hole located in the middle of the limiting buckle is arranged opposite to the center hole, which can ensure the stability of the docking between the through hole and the center hole.

[0027] like Figure 2 , Figure 3 As shown, the outer periphery of the two end caps is also provided with a circle of cover eaves, the cover eaves are perpendicular to the inner side surface of the end caps and the inner diameter of the cover eaves is the same as the outer diameter of the folded filter element layer. The cover eaves are sleeved on both ends of the outer peripheral surface of the folded filter element layer to further improve the stability of the fixation of the end caps and the two ends of the filter element.

[0028] The filtration accuracy of the meltblown filter core layer is greater than that of the pleated filter core layer. The fluid flows in from the periphery of the pleated filter core layer, flows into the central hole after being filtered by the pleated filter core layer and the meltblown filter core layer, and flows out from the through hole of the end cover.

[0029] In some embodiments, an annular sealing groove is provided on the inner side surface of the end cover, and a sealing rubber ring is provided in the sealing groove to ensure the sealing performance at both ends of the filter element; wherein, the end of the filter element body and the end cover can be further fixed by glue to ensure the firmness of the connection between the end cover and the filter element body.

[0030] like Figure 1 , Figure 2 As shown, in some embodiments, a filter screen is further provided on the periphery of the folded filter element layer, and the filter screen is a stainless steel filter screen, and the two ends of the stainless steel filter screen are connected to the cover eaves of the end caps at the two ends of the filter element body. In one embodiment, the two ends of the stainless steel filter screen are connected to the cover eaves of the end caps at the two ends of the filter element body by glue. In another embodiment, the two ends of the stainless steel filter screen are welded to the cover eaves of the end caps at the two ends of the filter element body. The length and width of the stainless steel filter screen can be adjusted according to the length and width of the filter element body, so as to meet the needs of filter elements of different sizes, which will not be described in detail here.

[0031] In some embodiments, the thickness of the pleated filter layer is greater than the thickness of the meltblown filter layer.

[0032] In some embodiments, the meltblown filter layer is a PP fiber meltblown filter layer, a PET fiber meltblown filter layer, a PA6 fiber meltblown filter layer or a PA66 fiber meltblown filter layer, and the fiber monofilament fineness of the meltblown filter layer is 1 denier to 20 deniers.

[0033] The fiber filaments of the meltblown filter layer are formed with a tooth-groove structure on the periphery of the cross section, including tooth portions 10 and groove portions 11 arranged at intervals, such as Figure 4 As shown, the number of teeth 10 of the fiber filament is 3-12 teeth, and the shape, number and length of the teeth 10 and the groove 11 are not limited. In the tooth-groove structure, the arrangement of the groove 11 can adsorb impurities, further improving the dirt holding capacity and adsorption of the melt-blown filter core layer, and the arrangement of the teeth 10 can ensure the spacing distance between the fiber filaments, thereby ensuring the porosity of the melt-blown filter core layer; in a preferred embodiment, in order to avoid the meshing of the tooth-groove structures on the periphery of the fiber filaments of the same shape, the melt-blown filter layer includes fiber filaments with different numbers of teeth 10 and lengths of teeth 10, such as Figure 5 As shown, the left side shows the cross-sectional bonding state between fiber filaments with the same tooth-groove structure. At this time, multiple fiber filaments are easy to mesh with each other, the gap is small, and the melt-blown filter core layer is easy to be blocked; the right side shows the cross-sectional bonding state between fiber filaments with different numbers of teeth 10 and lengths of teeth 10. At this time, there is a certain spacing distance between different fiber filaments, thereby ensuring the porosity of the melt-blown filter core layer.

[0034] 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. A composite filter element with high adsorption capacity, comprising a cylindrical filter element body, characterized in that: The filter element body comprises a meltblown filter element layer and a folded filter element layer coaxially arranged on the periphery of the meltblown filter element layer, the meltblown filter element layer is hollow, and comprises a central hole penetrating the middle of the meltblown filter element layer, the central hole is coaxial with the filter element body, and both ends are open, end caps are symmetrically arranged at both ends of the filter element body, and through holes are respectively arranged on the two end caps, the through holes are communicated with the openings at both ends of the central hole, and the inner side surfaces of the two end caps are integrally provided with a tubular limit buckle along the periphery of the through hole, and the limit buckle is vertically arranged at The inner side surface of the end cover extends into the center hole from the openings at both ends of the center hole, the limit buckle is coaxially arranged with the center hole and its outer diameter is the same as the aperture of the center hole, so that the limit buckle is engaged with the center hole, and the outer periphery of the two end covers is also provided with a circle of cover eaves, the cover eaves are perpendicular to the inner side surface of the end cover and the inner diameter of the cover eaves is the same as the outer diameter of the folded filter core layer, the cover eaves are sleeved on both ends of the outer peripheral surface of the folded filter core layer, and the filtration accuracy of the meltblown filter core layer is greater than the filtration accuracy of the folded filter core layer.

2. The composite filter element with high adsorption according to claim 1, characterized in that: A filter screen is also arranged on the periphery of the folded filter core layer, and the filter screen is a stainless steel filter screen.

3. The composite filter element with high adsorption according to claim 2, characterized in that: The two ends of the stainless steel filter screen are connected to the cover ridges of the end covers at the two ends of the filter element body.

4. The composite filter element with high adsorption according to claim 3, characterized in that: The two ends of the stainless steel filter screen are connected to the cover brims of the end covers at the two ends of the filter element body by glue or welding.

5. The composite filter element with high adsorption according to claim 1, characterized in that: The thickness of the pleated filter core layer is greater than the thickness of the meltblown filter core layer.

6. The composite filter element with high adsorption according to claim 1, characterized in that: An annular sealing groove body is also provided on the inner side surface of the end cover, and a sealing rubber ring is provided in the sealing groove body.

7. The composite filter element with high adsorption according to claim 1, characterized in that: The meltblown filter core layer is a PP fiber meltblown filter core layer, a PET fiber meltblown filter core layer, a PA6 fiber meltblown filter core layer or a PA66 fiber meltblown filter core layer.

8. The composite filter element with high adsorption according to claim 7, characterized in that: The fiber monofilament fineness of the melt-blown filter core layer is 1 denier to 20 deniers.

9. The composite filter element with high adsorption according to claim 8, characterized in that: The fiber filaments of the meltblown filter core layer have a tooth-groove structure formed on the periphery of the cross section, comprising tooth portions (10) and groove portions (11) arranged at intervals, and the number of tooth portions (10) of the fiber filaments is 3 to 12 teeth.

10. The composite filter element with high adsorption according to claim 9, characterized in that: The melt-blown filter core layer comprises fiber filaments with different numbers of teeth (10) and lengths of teeth (10).

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