A multi-layer composite microporous membrane folded filter cartridge

Abstract

The utility model discloses a kind of multi-layer composite microporous membrane folding filter element, it is related to filter equipment technical field, including cylinder, the top of the cylinder is equipped with top cover, the inner wall of the cylinder is separately provided with top shell and bottom shell, and top shell and bottom shell are symmetrically designed from top to bottom, the inner wall of top shell and bottom shell is inserted with multiple first filter elements, the utility model has beneficial effect as follows: by the setting of multiple first filter elements, the filtering area of the device to fluid can be increased, to improve filtering efficiency, by the installation and disassembly of clamping ring can be conveniently folding filter element body, it is beneficial to post maintenance replacement, folding filter element body adopts multi-layer composite microporous membrane material, filtering precision is high, can effectively intercept small impurities, by its outside sleeve setting filter cartridge can play the protection effect to filter element, enhance overall structural stability, cylinder bottom is provided with multiple water outlet holes, it is beneficial to the smooth flow of filtered liquid, guarantee filtering system stable operation.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment technology, and in particular to a multi-layer composite microporous membrane pleated filter element. Background Technology

[0002] Filter cartridges are the core components of filtration systems, used to remove impurities, particles, microorganisms, and other harmful substances from liquids or gases to improve the purity of the medium. They are usually made of porous materials and achieve filtration through physical interception, adsorption, or chemical reaction. Filter cartridges have a wide range of applications, including household water purifiers, air purifiers, automotive oil filters, and industrial water treatment equipment. Their performance indicators include filtration accuracy, dirt holding capacity, and service life, and should be selected according to specific needs.

[0003] In numerous industrial and civilian sectors, such as food and beverage processing, pharmaceuticals, electronic semiconductor manufacturing, chemical production, and water treatment, there are extremely stringent and diverse requirements for the filtration and purification of liquids or gases. However, existing filter cartridges have relatively simple structures, often using a single material or a simple combination of filter materials. This limits their filtration accuracy, making it difficult to efficiently intercept impurities such as tiny particles, bacteria, and viruses. Consequently, the filtered liquids or gases may still contain a certain amount of harmful substances, failing to meet the production requirements for high purity and cleanliness. At the same time, existing filter cartridges have weak dirt-holding capacity. During the filtration process, impurities easily and quickly clog the surface of the filter cartridge, significantly shortening its lifespan and requiring frequent replacement. This not only increases production costs but also affects the continuity and stability of production. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A multi-layer composite microporous membrane pleated filter element includes a cylindrical body, a top cover installed on the top of the cylindrical body, and a top shell and a bottom shell respectively provided on the inner wall of the cylindrical body, wherein the top shell and the bottom shell are designed to be symmetrically arranged.

[0007] Multiple sets of first filter elements are inserted into the inner walls of the top shell and the bottom shell. The first filter element is equipped with a filter assembly inside. Multiple sets of water outlet holes are opened at the bottom of the cylinder.

[0008] The filter assembly includes two sets of snap-fit ​​rings respectively disposed on the inner walls of the top shell and the bottom shell. A pleated filter element body is inserted into the inner wall of the snap-fit ​​ring, and the pleated filter element body is made of a multi-layer composite microporous membrane. A filter cartridge is sleeved on the outer side of the pleated filter element body.

[0009] As a preferred embodiment of the multi-layer composite microporous membrane pleated filter element of this utility model, a connecting flange is installed on the top of the cylinder, and the top of the connecting flange is fixedly connected to the bottom of the top cover. Four sets of mounting holes are opened on the inner wall of the connecting flange.

[0010] As a preferred embodiment of the multi-layer composite microporous membrane pleated filter element of this utility model, the outer side of the top cover is connected to a first water inlet pipe, and a filter screen is installed on the inner wall of the first water inlet pipe.

[0011] As a preferred embodiment of the multi-layer composite microporous membrane pleated filter element of this utility model, wherein: a flange is provided at one end of the first water inlet pipe, and four sets of threaded holes are opened on the inner wall of the flange.

[0012] As a preferred embodiment of the multi-layer composite microporous membrane pleated filter element of this utility model, wherein: the outer side of the top cover is connected to a threaded joint, and the outer side of the threaded joint is threaded with an installation cap.

[0013] As a preferred embodiment of the multi-layer composite microporous membrane pleated filter element of this utility model, wherein: the outer side of the top cover is connected to a horizontally arranged exhaust pipe, and one end of the exhaust pipe is threadedly connected to a sealing cap.

[0014] As a preferred embodiment of the multi-layer composite microporous membrane pleated filter element of this utility model, a bottom cover is installed at the bottom of the cylinder, and a protrusion is fixed on the inner wall of the bottom cover, with the outer side of the protrusion fitting into the inner wall of the cylinder.

[0015] In summary, this utility model has the following beneficial effects:

[0016] By setting multiple sets of first filter elements, the filtration area of ​​the device for fluid can be increased, thereby improving filtration efficiency. The snap-fit ​​ring facilitates the installation and disassembly of the folded filter element body, which is convenient for later maintenance and replacement. The folded filter element body is made of multi-layer composite microporous membrane material, which has high filtration accuracy and can effectively intercept tiny impurities. The filter element is protected by the filter cylinder on the outside, which enhances the overall structural stability. Multiple sets of water outlet holes are opened at the bottom of the cylinder to facilitate the smooth flow of filtered liquid and ensure the stable operation of the filtration system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a structural diagram of a multi-layer composite microporous membrane pleated filter element.

[0019] Figure 2 This is a diagram of the cylindrical structure of a multi-layer composite microporous membrane pleated filter element.

[0020] Figure 3 This is a structural diagram of the first filter element in a multi-layer composite microporous membrane pleated filter element.

[0021] Figure 4 This is a structural diagram of a multi-layer composite microporous membrane pleated filter element.

[0022] Figure 5 This is a structural diagram of the top cover of a multi-layer composite microporous membrane pleated filter cartridge.

[0023] The following are the labeling elements in the diagram: 1. Cylinder body; 2. Top cover; 3. Top shell; 4. Bottom shell; 5. First filter element; 6. Filter assembly; 61. Snap-fit ​​ring; 62. Folded filter element body; 63. Filter cartridge; 7. Water outlet; 8. Connecting flange; 9. Mounting hole; 10. First water inlet pipe; 11. Filter screen; 12. Flange; 13. Threaded hole; 14. Threaded joint; 15. Mounting cap; 16. Exhaust pipe; 17. Sealing cap; 18. Bottom cover; 19. Protrusion. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1:

[0028] Reference Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a multi-layer composite microporous membrane pleated filter element, including a cylindrical body 1, a top cover 2 installed on the top of the cylindrical body 1, and a top shell 3 and a bottom shell 4 respectively provided on the inner wall of the cylindrical body 1, and the top shell 3 and the bottom shell 4 are designed to be symmetrical.

[0029] The cylinder 1 serves as the main frame of the entire filter element, providing installation support and housing space for other components, protecting the internal filter element structure, and forming a channel for fluid filtration. The top cover 2 is installed on the top of the cylinder 1, serving to seal the cylinder 1, prevent fluid leakage, and ensure the sealing of the filtration process. At the same time, it serves as the mounting carrier for multiple connecting components, such as the first inlet pipe 10, threaded joint 14, and exhaust pipe 16, facilitating the connection between the filter element and the external piping system. The top shell 3 and bottom shell 4 provide an installation position and support for the first filter element 5, ensuring its stable placement within the cylinder 1. Simultaneously, the top shell 3, bottom shell 4, and inner wall of the cylinder 1 cooperate to form a relatively independent filtration space, guiding the fluid through the filter element along a specific path for filtration.

[0030] Multiple sets of first filter elements 5 are inserted into the inner walls of the top shell 3 and the bottom shell 4. The first filter element 5 is equipped with a filter assembly 6 inside. Multiple sets of water outlet holes 7 are opened at the bottom of the cylinder 1.

[0031] The first filter element 5, as the main filtration unit, can be used in conjunction with the filter assembly 6 inside it to filter the fluid, remove impurities, particles and other substances from the fluid. The water outlet 7 can guide the filtered fluid out of the cylinder 1 to achieve the function of discharging the filtered fluid.

[0032] The filter assembly 6 includes two sets of snap rings 61 respectively disposed on the inner walls of the top shell 3 and the bottom shell 4. A pleated filter element body 62 is inserted into the inner wall of the snap ring 61, and the material of the pleated filter element body 62 is a multi-layer composite microporous membrane. A filter cartridge 63 is sleeved on the outer side of the pleated filter element body 62.

[0033] Two sets of snap-fit ​​rings 61 are used to insert the pleated filter element body 62, serving to fix and position the pleated filter element body 62, ensuring that the pleated filter element body 62 maintains a stable position and shape during filtration. The pleated filter element body 62 is made of a multi-layer composite microporous membrane, typically made of polymer materials such as polypropylene, polyethersulfone, polytetrafluoroethylene, or nylon. It achieves complementary performance through a multi-layer composite process, forming a three-dimensional pore structure through phase inversion, stretching, or thermally induced phase separation methods. The pore size distribution is uniform, typically 0.1-10 μm, combining high porosity (>80%) and low flow resistance, achieving a balance between high-efficiency filtration and long service life. The corrugated pleated design expands the membrane area several times within a limited space, significantly improving flux and dirt holding capacity. The multi-layer composite membrane can be designed with a gradient pore size distribution to intercept particles step by step, reducing membrane surface clogging and extending service life. This special material and structure gives it a large filtration area and good filtration performance, effectively intercepting tiny particles and impurities in the fluid for high-efficiency filtration. The filter cartridge 63, fitted onto the outside of the pleated filter element body 62, protects the pleated filter element body 62 from damage during installation and use, while also helping to maintain the shape of the pleated filter element body 62 and ensure filtration effect.

[0034] Example 2:

[0035] This is the second embodiment of the present invention, which is based on the previous embodiment.

[0036] Specifically, a connecting flange 8 is installed on the top of the cylinder 1, and the top of the connecting flange 8 is fixedly connected to the bottom of the top cover 2. Four sets of mounting holes 9 are opened on the inner wall of the connecting flange 8.

[0037] The connecting flange 8 is used to connect the cylinder 1 and the top cover 2, enhancing the integrity and sealing of the structure. The four sets of mounting holes 9 on its inner wall are used to fix the filter element to the top cover 2 with bolts, which facilitates the assembly and disassembly of the filter element.

[0038] Specifically, the outer side of the top cover 2 is connected to a first water inlet pipe 10, and a filter screen 11 is installed on the inner wall of the first water inlet pipe 10.

[0039] The first inlet pipe 10 serves as a channel for fluid to enter the filter element, introducing the fluid to be filtered into the cylinder 1 for filtration. The filter screen 11 is used to perform preliminary filtration of the fluid entering the filter element, intercepting larger particles and impurities, preventing them from entering the filter element and damaging the folded filter element body 62, and extending the service life of the filter element.

[0040] Specifically, a flange 12 is provided at one end of the first water inlet pipe 10, and four sets of threaded holes 13 are provided on the inner wall of the flange 12.

[0041] The flange 12 is designed so that the first water inlet pipe 10 can be connected to the external piping system by means of four sets of threaded holes 13 on its inner wall, thereby enabling the smooth introduction of fluid.

[0042] Example 3:

[0043] This is the third embodiment of the present invention, which is based on the first two embodiments.

[0044] Specifically, the outer side of the top cover 2 is connected to a threaded connector 14, and the outer side of the threaded connector 14 is threadedly connected to a mounting cap 15.

[0045] The threaded connector 14, when used in conjunction with the mounting cap 15, can be used to connect other pipes or equipment, or as a spare interface, facilitating expansion and connection according to actual needs.

[0046] Specifically, the outer side of the top cover 2 is connected to a horizontally arranged exhaust pipe 16, and one end of the exhaust pipe 16 is threadedly connected to a sealing cap 17.

[0047] The vent pipe 16, which is laterally connected to the outside of the top cover 2, allows the sealing cover 17 to be opened before or during filter element use, so that the air inside the cylinder 1 can be discharged through the vent pipe 16, ensuring that the filter element is filled with the fluid to be filtered and improving filtration efficiency. At the same time, venting can also be performed as needed during use to maintain stable internal pressure of the filter element. The sealing cover 17 is designed to close the vent pipe 16 when venting is not required to prevent fluid leakage.

[0048] Specifically, a bottom cover 18 is installed at the bottom of the cylinder 1, and a protrusion 19 is fixed on the inner wall of the bottom cover 18, with the outer side of the protrusion 19 fitting into the inner wall of the cylinder 1.

[0049] The bottom cover 18, in conjunction with the top cover 2, further seals the cylinder 1, enhancing the overall structural sealing. Simultaneously, the protrusion 19 on the inner wall of the bottom cover 18, which engages with the inner wall of the cylinder 1, positions and stabilizes the bottom cover 18, preventing it from wobbling within the cylinder 1 and ensuring structural stability. In addition to positioning and stabilizing the bottom cover 18, the protrusion 19 also enhances the seal between the bottom cover 18 and the cylinder 1, preventing fluid leakage from the connection point. Furthermore, it guides the filtered fluid to the outlet hole 7, facilitating the discharge of the filtered fluid.

[0050] Working principle: When the filter element is working, the fluid to be filtered is first guided into the cylinder 1 through the first inlet pipe 10 on the outside of the top cover 2. The fluid is initially filtered by the filter screen 11 on the inner wall of the first inlet pipe 10, which intercepts larger particles and impurities to prevent them from damaging the internal filter element. After the fluid enters the cylinder 1, under pressure, it passes through the pleated filter element body 62, which is fixed by the snap ring 61. Its multi-layer composite microporous membrane material has high-efficiency filtration performance and can intercept small particles and impurities in the fluid. The filter cylinder 63 protects the pleated filter element body 62 and maintains its shape. Then the fluid passes through multiple sets of first filter elements 5 inserted into the inner walls of the top shell 3 and the bottom shell 4. The fluid is filtered again through the first filter element 5. The filtered clean fluid gathers at the bottom of the cylinder 1 and flows out through multiple sets of water outlet holes 7 opened at the bottom of the cylinder 1 under the guidance of the protrusion 19, completing the filtration process. Before use or maintenance of the filter element, the sealing cover 17 at one end of the exhaust pipe 16 can be opened to release the air in the cylinder 1, ensuring that the filter element is full of fluid and improving the filtration efficiency. The connecting flange 8 and mounting hole 9 at the top of the cylinder 1 facilitate the connection and fixation of the filter element with other equipment. The flange 12 and threaded hole 13 at one end of the first water inlet pipe 10 facilitate the connection with external pipes. The threaded joint 14 and mounting cap 15 on the outside of the top cover 2 can be used as spare interfaces.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A multi-layer composite microporous membrane pleated filter element, comprising a cylindrical body (1), characterized in that: The top of the cylinder (1) is fitted with a top cover (2), and the inner wall of the cylinder (1) is provided with a top shell (3) and a bottom shell (4), and the top shell (3) and the bottom shell (4) are designed to be symmetrical. Multiple sets of first filter elements (5) are inserted into the inner walls of the top shell (3) and the bottom shell (4). The first filter element (5) is equipped with a filter assembly (6). Multiple sets of water outlet holes (7) are opened at the bottom of the cylinder (1). The filter assembly (6) includes two sets of snap rings (61) respectively disposed on the inner walls of the top shell (3) and the bottom shell (4). A pleated filter body (62) is inserted into the inner wall of the snap ring (61), and the material of the pleated filter body (62) is a multi-layer composite microporous membrane. A filter cartridge (63) is sleeved on the outer side of the pleated filter body (62).

2. The multi-layer composite microporous membrane pleated filter element as described in claim 1, characterized in that: The top of the cylinder (1) is equipped with a connecting flange (8), and the top of the connecting flange (8) is fixedly connected to the bottom of the top cover (2). The inner wall of the connecting flange (8) is provided with four sets of mounting holes (9).

3. The multi-layer composite microporous membrane pleated filter element as described in claim 1, characterized in that: The outer side of the top cover (2) is connected to a first water inlet pipe (10), and a filter screen (11) is installed on the inner wall of the first water inlet pipe (10).

4. The multi-layer composite microporous membrane pleated filter element as described in claim 3, characterized in that: A flange (12) is provided at one end of the first water inlet pipe (10), and four sets of threaded holes (13) are provided on the inner wall of the flange (12).

5. The multi-layer composite microporous membrane pleated filter element as described in claim 1, characterized in that: The outer side of the top cover (2) is connected to a threaded joint (14), and the outer side of the threaded joint (14) is threaded with a mounting cap (15).

6. The multi-layer composite microporous membrane pleated filter element as described in claim 1, characterized in that: The outer side of the top cover (2) is connected to a horizontally arranged exhaust pipe (16), and one end of the exhaust pipe (16) is threadedly connected to a sealing cap (17).

7. The multi-layer composite microporous membrane pleated filter element as described in claim 1, characterized in that: The bottom of the cylinder (1) is fitted with a bottom cover (18), and a protrusion (19) is fixed on the inner wall of the bottom cover (18), and the outer side of the protrusion (19) fits into the inner wall of the cylinder (1).

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