A cylindrical filter cartridge

Abstract

The utility model provides a kind of cylindrical filter element, it is related to gas purification field.The cylindrical filter element includes filter material layer, the outside of filter material layer is sequentially provided with activated carbon layer and support layer, the both ends of filter material layer, activated carbon layer and support layer after assembly are respectively equipped with upper seal structure and lower seal structure, upper seal structure and lower seal structure are oppositely arranged, upper seal structure and lower seal structure adopt flexible structure, activated carbon layer and support layer can move along the radial direction of cylindrical filter element under external force.The upper seal structure, lower seal structure all adopt annular flexible design, and support layer is made of material with shape memory characteristic, so that the whole cylindrical filter element can withstand a certain degree of extrusion and produce temporary deformation during transportation, thereby effectively reducing its occupied space, reduce packaging and transportation cost.

Description

Technical Field

[0001] This utility model relates to the field of gas purification, and more specifically, to a cylindrical filter element. Background Technology

[0002] Currently available cylindrical filter screens typically consist of three main structures: an upper sealing layer, a middle filtration layer, and a lower sealing layer. To ensure overall sealing performance, the upper and lower ends are generally sealed with plastic end caps combined with adhesives, or with foam potting to form a sealed structure. This integrated end-face sealing method makes the filter screen highly rigid, difficult to bend, or with extremely limited allowable deformation. Therefore, during storage and transportation, the filter screen must maintain its original cylindrical shape, resulting in the ineffective use of the hollow central area and a large space occupation. This structure significantly increases storage and transportation costs, especially for large-diameter cylindrical filter screens. Utility Model Content

[0003] This utility model provides a cylindrical filter element that can undergo controllable deformation during transportation, thereby significantly reducing the space occupied. When in use, it can quickly restore its original cylindrical structure, effectively reducing storage and transportation costs.

[0004] An embodiment of this utility model provides a cylindrical filter element, including a filter media layer and a support layer disposed on the outer side of the filter media layer. The filter media layer and the support layer are assembled to form a cylindrical assembly. An upper sealing structure and a lower sealing structure are respectively installed at opposite ends of the cylindrical assembly. The upper sealing structure and the lower sealing structure are disposed opposite to each other. The upper sealing structure and the lower sealing structure are made of flexible material. The support layer has radial compressibility and shape recovery characteristics.

[0005] Optionally, the support layer is a PE mesh, a PP mesh, or a mesh containing metal components.

[0006] Optionally, the filter material layer has a pleated structure, and the surface of the pleated structure is coated with multiple adhesive strips, which are spaced apart.

[0007] Optionally, the adhesive strip includes an end adhesive strip and a middle adhesive strip located between the end adhesive strips, wherein the end adhesive strip is located in the end region of the filter material layer, and the distance D1 between the end adhesive strip and the corresponding end of the filter material layer satisfies: D1≤20mm.

[0008] Optionally, there may be multiple central adhesive strips, and the distance D2 between two adjacent central adhesive strips satisfies: 22mm≤D2≤28mm.

[0009] Optionally, the spacing D2 between two adjacent middle adhesive strips is 25.4 mm.

[0010] Optionally, the distance D3 between the middle adhesive strip and the end adhesive strip satisfies: 24mm≤D3≤26mm.

[0011] Optionally, the cylindrical filter element further includes a pre-filter layer, which is located on the side of the support layer away from the filter material layer, and the two end faces of the pre-filter layer are respectively connected to the upper sealing structure and the lower sealing structure.

[0012] Optionally, both the upper sealing structure and the lower sealing structure are made of foamed rubber or polyurethane.

[0013] Optionally, the activated carbon layer includes a mesh substrate and carbon particles, wherein the carbon particles are attached to the surface of the mesh substrate.

[0014] The beneficial effects of the cylindrical filter element in this embodiment of the utility model include, for example: A cylindrical filter element includes a filter media layer, an activated carbon layer and a support layer sequentially disposed on the outer side of the filter media layer, and an upper sealing structure and a lower sealing structure respectively installed at both ends of the assembled filter media layer, the activated carbon layer and the support layer. The upper sealing structure and the lower sealing structure are arranged opposite to each other and are flexible structures. The activated carbon layer and the support layer have radial compressibility characteristics, which can deform when a radial external force is applied and restore the cylindrical shape after the external force is removed.

[0015] Because the cylindrical activated carbon layer and support layer can elastically deform along the radial direction of the filter element under external force, and the upper and lower sealing structures adopt a ring-shaped flexible design, the entire cylindrical filter element can withstand a certain degree of compression and temporary deformation during transportation, thereby effectively reducing its space occupation and lowering packaging and transportation costs. Furthermore, the support layer not only undergoes significant deformation under pressure to absorb external force, but also returns to its original shape after the external pressure is removed, providing structural resilience support for the remaining layered structure of the filter element. This design ensures the long-term performance of the filter element while balancing transportation convenience and structural reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the cylindrical filter element provided in this embodiment from a first-view perspective; Figure 2 This is a schematic diagram of the filter material layer provided in this embodiment from a first-view perspective; Figure 3 This is a schematic diagram of the structure of the filter material layer in its unfolded state as provided in this embodiment.

[0018] Icons: 10 - Cylindrical filter element; 100 - Filter media layer; 200 - Activated carbon layer; 300 - Support layer; 400 - Upper sealing structure; 500 - Lower sealing structure; 600 - Adhesive strip; 610 - End adhesive strip; 630 - Middle adhesive strip. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Also, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] It should also be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] As described in the background section, traditional cylindrical filters, due to their high overall rigidity, occupy a large space during transportation, thereby increasing warehousing and transportation costs.

[0027] Please refer to Figure 1 and Figure 2 This utility model provides a cylindrical filter element 10 that can undergo controllable deformation during transportation, thereby significantly reducing the space occupied. When in use, it can quickly restore the original cylindrical structure, effectively reducing warehousing and transportation costs.

[0028] The cylindrical filter element 10 includes a filter media layer 100, and a support layer 300 is provided on the outer side of the filter media layer 100. The filter media layer 100 and the support layer 300 are assembled to form a cylindrical assembly. An upper sealing structure 400 and a lower sealing structure 500 are respectively installed at opposite ends of the cylindrical assembly. The upper sealing structure 400 and the lower sealing structure 500 are arranged opposite to each other. The upper sealing structure 400 and the lower sealing structure 500 adopt a flexible structure. The support layer has radial compressibility and shape recovery characteristics. Specifically, the support layer can deform when a radial external force is applied and restore the cylindrical shape after the external force is removed.

[0029] Because the cylindrical activated carbon layer 200 and support layer 300 can elastically deform along the radial direction of the filter element under external force, and the upper and lower sealing structures 500 adopt a ring-shaped flexible design, the entire cylindrical filter element 10 can withstand a certain degree of compression and temporary deformation during transportation, thereby effectively reducing its space occupation and lowering packaging and transportation costs. Furthermore, the support layer 300 is made of a material with shape memory properties, which not only allows for significant deformation under pressure to absorb external force, but also restores its original shape after the external pressure is removed, providing structural resilience support for the activated carbon layer 200 and filter media layer 100. This design ensures the long-term performance of the filter element while also considering transportation convenience and structural reliability.

[0030] It should be noted that the term "cylindrical filter element" in this solution is intended to describe its basic characteristic of being hollow inside, and does not limit the specific shapes of the outer and inner walls of the filter element. For example, the outer and inner walls of the embodiment shown in the attached drawings are both circular, which is only one feasible example.

[0031] Furthermore, the support layer 300 is a PE aggregate mesh, a PP aggregate mesh, or a mesh containing metal components.

[0032] Specifically, PE or PP mesh reinforcement possesses excellent shape memory properties and high mechanical strength. Under pressure, PE or PP mesh reinforcement can undergo significant deformation to absorb external forces, while rapidly returning to its original shape after the external pressure is removed. This characteristic not only provides reliable structural resilience support for the activated carbon layer 200 and filter media layer 100, but also ensures the stability and durability of the filter element after repeated compressions.

[0033] Further, please refer to Figure 2 and Figure 3 The filter material layer 100 has a pleated structure, and the surface of the pleated structure is coated with multiple adhesive strips 600, which are spaced apart.

[0034] The filter media layer 100 adopts a pleated structure, formed by folding filter paper. The two ends of the folded filter paper are bonded together with hot melt adhesive to form a ring structure, ensuring the overall stability and sealing of the filter media layer 100. Multiple spaced adhesive strips 600 are coated on the folded surfaces of the pleated structure of the filter media layer 100 (including the outer and inner sides of the ring structure). These adhesive strips 600 are coated circumferentially on the inner and outer sides of the filter media layer 100, and the positions of the inner and outer adhesive strips 600 correspond to each other, further enhancing the structural strength and stability of the filter media layer 100. The adhesive strips 600 can be made of non-foaming hot melt adhesive or foaming hot melt adhesive, and different coating methods can be selected according to specific needs, such as full-mountain coating or half-mountain coating of the pleated structure. This design not only improves the mechanical strength and durability of the filter media layer 100, but also ensures its shape retention during repeated compression and recovery processes. This, in turn, works synergistically with the PE or PP mesh of the support layer 300 to ensure the performance and reliability of the filter element during transportation and use.

[0035] Further, please refer to Figure 3 The adhesive strip 600 includes end adhesive strips 610 and middle adhesive strips 630 located between the end adhesive strips 610. The end adhesive strips 610 are located in the end region of the filter material layer 100, and the distance D1 between them and the corresponding end of the filter material layer 100 satisfies: D1≤20 mm. There are multiple middle adhesive strips 630, and the spacing D2 between two adjacent middle adhesive strips 630 satisfies: 22 mm≤D2≤28 mm.

[0036] This layout design aims to optimize the overall stress distribution of the cylindrical filter element 10. During integration, the end rubber strips 610 are positioned close to the upper and lower sealing structures 500, limiting the distance D1 between the corresponding ends of the filter media layer 100 to within 20 mm, and the spacing D2 between two adjacent middle rubber strips 630 is limited to between 24 mm and 26 mm. Utilizing the synergistic effect of the end rubber strips 610 and the middle rubber strips 630, the stress distribution in the integrated portion of the filter media layer 100 and the rubber strips 600, as well as between them and the upper sealing structure 400 and the lower sealing structure 500, is more uniform when the filter element is subjected to external forces. This effectively prevents excessive or irreversible deformation of the cylindrical filter element 10, ensuring its structural integrity and service life.

[0037] Furthermore, the distance D2 between two adjacent middle adhesive strips 630 is 25.4 mm.

[0038] Setting the spacing D2 between two adjacent central rubber strips 630 to 25.4 mm is the optimal design parameter derived from extensive experimental verification and mechanical simulation analysis. This value maximizes the distribution of the supporting effect of the rubber strips 600 while maintaining the filter media pleat density. Specifically, the equidistant arrangement of 25.4 mm allows the pressure and vibration loads borne by the filter media layer 100 in the axial and circumferential directions to be more evenly transmitted to each central rubber strip 630 and the upper and lower seals, significantly improving the overall compressive stability and dynamic durability of the filter element. In addition, this dimension is highly compatible with standard manufacturing modules, facilitating precise positioning and bonding operations in automated production, reducing process deviations, and improving product consistency and yield. Therefore, this design not only enhances the structural reliability of the filter element under complex operating conditions but also provides technical support for mass production.

[0039] Furthermore, the distance D3 between the middle rubber strip 630 and the end rubber strip 610 satisfies: 24 mm ≤ D3 ≤ 26 mm.

[0040] Specifically, setting the distance D3 between the middle rubber strip 630 and the end rubber strip 610 to between 24 mm and 26 mm ensures a smoother stress transition between the end and middle regions of the filter media layer 100. This uniform spacing not only helps reduce local stress concentration but also effectively prevents breakage or deformation of the filter media layer 100 at the connection between the end and middle regions. Through this design, the stress distribution between the integrated portion of the filter media layer 100 and the rubber strip 600, as well as between them and the upper sealing structure 400 and the lower sealing structure 500, is more uniform, thereby significantly improving the overall stability and durability of the filter element under external forces. Furthermore, the cylindrical filter element 10 also includes a pre-filter layer, which is located on the side of the support layer 300 away from the filter media layer 100, and its two end faces are connected to the upper sealing structure 400 and the lower sealing structure 500, respectively.

[0041] Specifically, the pre-filter layer is positioned on the outside of the activated carbon layer 200 and the support layer 300 (i.e., on the side furthest from the filter media layer 100). This maximizes the resilience of the support layer 300, ensuring that the cylindrical filter element 10 quickly returns to its original shape after being subjected to external forces, thus maintaining the overall structural stability and service life of the cylindrical filter element 10. Furthermore, the pre-filter layer effectively intercepts large particulate pollutants, preventing them from entering the downstream high-efficiency filter media layer 100, thereby protecting the filter media layer 100 from contamination and damage, extending its service life, and maintaining its high-efficiency filtration performance.

[0042] Furthermore, both the upper sealing structure 400 and the lower sealing structure 500 are made of foamed rubber or polyurethane. This choice of material brings several technical advantages, especially when multiple layers are wrapped at the ends.

[0043] First, the foamed rubber or polyurethane has excellent flexibility, which allows it to tightly and uniformly wrap the multi-layered materials (including the primary filter layer, support layer 300, and activated carbon layer 200). This not only improves the sealing performance of the cylindrical filter element 10, but also avoids uneven wrapping or edge curling problems caused by the high hardness of the materials of the upper sealing structure 400 and the lower sealing structure 500.

[0044] Furthermore, the flexibility of foamed rubber or polyurethane makes them easier to handle during installation. Whether for manual installation or assembly on an automated production line, foamed rubber or polyurethane can easily adapt to various shapes and sizes, thereby improving production efficiency and product quality consistency.

[0045] Furthermore, the activated carbon layer 200 includes a mesh substrate and carbon particles, with the carbon particles adhering to the surface of the mesh substrate.

[0046] The mesh substrate provides excellent support and structural stability. Typically made of high-strength, corrosion-resistant materials, it can withstand significant mechanical stress, ensuring that the activated carbon layer 200 will not deform or break during use. This not only extends the service life of the cylindrical filter element 10 but also guarantees its stable performance under various operating conditions. The carbon particles adhere to the surface of the mesh substrate, giving the activated carbon layer 200 highly efficient adsorption capabilities. The high specific surface area and abundant microporous structure of the carbon particles enable them to effectively adsorb harmful gases, odors, and volatile organic compounds (VOCs) from the air. This structural design ensures that the carbon particles can fully contact the airflow, improving adsorption efficiency and thus providing cleaner air quality.

[0047] The design of the carbon particles adhering to the surface of the mesh substrate is easy to understand, facilitating production and maintenance. During production, the carbon particles can be evenly adhered to the mesh substrate through spraying, dipping, or other methods, simplifying the manufacturing process. During maintenance, if replacement or regeneration of the activated carbon layer 200 is required, it is also relatively easy to operate, reducing maintenance costs and time.

[0048] In summary, this utility model embodiment provides a cylindrical filter element 10. Both the upper sealing structure 400 and the lower sealing structure 500 adopt a ring-shaped flexible design, and the support layer 300 is made of a material with shape memory properties. This allows the entire cylindrical filter element 10 to withstand a certain degree of compression and temporary deformation during transportation, effectively reducing its space occupation and lowering packaging and transportation costs. The distance D1 between the filter material layer 100 and its corresponding end is limited to within 20 mm, and the spacing D2 between two adjacent middle adhesive strips 630 is limited to between 24 mm and 26 mm. Utilizing the synergistic effect of the end adhesive strips 610 and the middle adhesive strips 630, the stress distribution between the integrated portion of the filter material layer 100 and the adhesive strips 600, and between them and the upper sealing structure 400 and the lower sealing structure 500, is more uniform when the filter element is subjected to external force. This effectively prevents excessive or irreversible deformation of the cylindrical filter element 10, ensuring its structural integrity and service life.

[0049] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A cylindrical filter element, characterized in that, The assembly includes a filter media layer (100), and a support layer (300) is provided on the outer side of the filter media layer (100). The filter media layer (100) and the support layer (300) are assembled to form a cylindrical assembly. An upper sealing structure (400) and a lower sealing structure (500) are respectively installed at opposite ends of the cylindrical assembly. The upper sealing structure (400) and the lower sealing structure (500) are arranged opposite to each other. The upper sealing structure (400) and the lower sealing structure (500) are made of flexible materials. The support layer (300) has radial compressibility and shape recovery characteristics.

2. The cylindrical filter element according to claim 1, characterized in that, The support layer (300) is a PE aggregate mesh, a PP aggregate mesh, or a mesh containing metal components.

3. The cylindrical filter element according to claim 1, characterized in that, The cylindrical filter element also includes an activated carbon layer (200), which is located between the filter material layer (100) and the support layer (300), and its two ends are connected to the upper sealing structure (400) and the lower sealing structure (500).

4. The cylindrical filter element according to claim 1, characterized in that, The filter material layer (100) has a pleated structure, and the surface of the pleated structure is coated with multiple adhesive strips (600), which are spaced apart.

5. The cylindrical filter element according to claim 4, characterized in that, The adhesive strip (600) includes an end adhesive strip (610) and a middle adhesive strip (630) located between the end adhesive strip (610). The end adhesive strip (610) is located in the end region of the filter material layer (100), and the distance D1 between it and the corresponding end of the filter material layer (100) satisfies: D1≤20mm.

6. The cylindrical filter element according to claim 5, characterized in that, There are multiple central adhesive strips (630), and the distance D2 between two adjacent central adhesive strips (630) satisfies: 22mm≤D2≤28mm.

7. The cylindrical filter element according to claim 5, characterized in that, The distance D3 between the middle adhesive strip (630) and the end adhesive strip (610) satisfies: 24mm≤D3≤26mm.

8. The cylindrical filter element according to claim 1, characterized in that, The cylindrical filter element (10) further includes a primary filter layer, which is located on the side of the support layer (300) away from the filter material layer (100), and the two end faces of the primary filter layer are respectively connected to the upper sealing structure (400) and the lower sealing structure (500).

9. The cylindrical filter element according to claim 1, characterized in that, Both the upper sealing structure (400) and the lower sealing structure (500) are made of foamed rubber or polyurethane.

10. The cylindrical filter element according to claim 3, characterized in that, The activated carbon layer (200) includes a mesh substrate and carbon particles, with the carbon particles attached to the surface of the mesh substrate.

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