Folding polytetrafluoroethylene composite microporous filter cartridge

Abstract

The utility model relates to liquid filtering technical field discloses the folding polytetrafluoroethylene composite microporous filter membrane filter core, including the top cover, the bottom of top cover is provided with the filter mechanism, the filter mechanism is used for filtering liquid, the bottom of filter mechanism is provided with the mounting mechanism, the mounting mechanism is used for installing whole device, the bottom of top cover is provided with the support mechanism, the filter mechanism includes the outer skeleton, the top of outer skeleton is fixedly connected in the bottom of top cover, the inboard fixedly connected with the flow guide braid of outer skeleton, the inboard fixedly connected with the filter membrane of flow guide braid, the inboard fixedly connected with the support braid of filter membrane, in the utility model, the outer skeleton and the inner skeleton provide structural support for filter membrane, and filter membrane carries out high accuracy filtration to liquid, realizes the stable operation of filter core under high temperature and strong corrosion environment, prolongs the service life of filter core, and guarantees the filtration effect of filter core high purity.

Description

Technical Field

[0001] This utility model relates to the field of liquid filtration technology, and in particular to a pleated polytetrafluoroethylene composite microporous filter membrane cartridge. Background Technology

[0002] The pleated PTFE composite microporous filter membrane cartridge is a high-performance filter element. Its core advantage lies in combining the unique properties of PTFE material with the composite filter membrane structure. The filter cartridge uses PTFE microporous filter membrane as the main filter body, and plays an irreplaceable role in fields with extremely high requirements for corrosion resistance, such as chemical, pharmaceutical, and electronic industries. At the same time, the filter cartridge has a composite structure with high strength and stable filtration performance, which effectively avoids the damage or deformation problems that may occur with a single filter membrane under high pressure or complex working conditions.

[0003] A search revealed Chinese Patent Publication No. CN215782734U, which discloses a microporous pleated filter element, comprising a filter element assembly. The filter element assembly consists of at least two filter element bodies, with their adjacent ends fixedly connected by a connecting mechanism. This connecting mechanism includes a first flange, a second flange, screw holes, and a fixing screw. The first flange is fixedly disposed at the upper end of the filter element body, and the second flange is fixedly disposed at the lower end of the filter element body. A screw through-hole is provided inside the second flange, and a screw hole is provided inside the first flange. A fixing screw is inserted into the screw through-hole, and the other end of the fixing screw is threadedly connected to the screw hole. This utility model... This invention addresses the problems of existing microporous pleated filter cartridges, which are generally of fixed size and inconvenient to carry and clean due to their excessive length. The new design features a length that can be disassembled, facilitating both carrying and cleaning. In practical use, to ensure the mechanical strength of the filter cartridge, a high-grammage polypropylene long-fiber nonwoven fabric is used as a protective layer on both sides of the membrane (upper and lower sides of the filtration process). However, during folding, the high-grammage polypropylene long-fiber nonwoven fabric frequently damages the filter membrane, affecting its lifespan. Furthermore, the polypropylene support material has poor high-temperature resistance, resulting in poor steam sterilization resistance of the filter cartridge. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a folded polytetrafluoroethylene composite microporous filter membrane element, which aims to improve the problems of short service life, poor high temperature resistance and poor corrosion resistance of filter elements in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a folded polytetrafluoroethylene composite microporous filter membrane cartridge, including a top cover, a filtration mechanism at the bottom of the top cover for filtering liquid, an installation mechanism at the bottom of the filtration mechanism for installing the entire device, a support mechanism at the bottom of the top cover, and an outer frame for the filtration mechanism. The top of the outer frame is fixedly connected to the bottom of the top cover, a flow-guiding woven mesh is fixedly connected to the inner side of the outer frame, a filter membrane is fixedly connected to the inner side of the flow-guiding woven mesh, a support woven mesh is fixedly connected to the inner side of the filter membrane, and an inner frame is fixedly connected to the inner side of the support woven mesh.

[0006] The above technical solution provides support for the filter membrane through the outer and inner skeletons, ensuring the structural strength of the filter element. The guide plate woven mesh uniformly guides the liquid filtration, and the support woven mesh supports the filter membrane, ensuring the stability of filtration.

[0007] As a further description of the above technical solution:

[0008] The installation mechanism includes triangular fins, the bottom of which is fixedly connected to the top of the top cover. A lower end cover is slidably connected to the bottom of the outer frame. A water outlet is fixedly connected to the bottom of the lower end cover. A fixing component is provided on the inner side of the lower end cover. A sealing component is provided on the outer side of the water outlet. An adjustment component is provided at the bottom of the water outlet.

[0009] The above technical solution involves positioning the filter element with triangular fins, installing the filter element on the filter machine, fixing the filter element with the lower end cover, and allowing the filtered water to flow out through the outlet.

[0010] As a further description of the above technical solution:

[0011] The fixing component includes an annular boss, the inner side of which is fixedly connected to the outer bottom of the outer frame, and an annular groove is provided on the inner side of the lower end cover.

[0012] The above technical solution involves pressing the lower end cover to engage the annular protrusion into the annular groove, thus completing the fixed connection between the lower end cover and the filter element and improving the overall structural strength of the filter element.

[0013] As a further description of the above technical solution:

[0014] The sealing assembly includes two sealing rings, the inner sides of which are fixedly connected to the upper and lower outer ends of the water outlet, and sealing grooves are provided at both the upper and lower outer ends of the water outlet.

[0015] The above technical solution ensures the device's airtightness by filling the gap between the sealing groove and the filter device during filter element installation, achieving a double sealing effect.

[0016] As a further description of the above technical solution:

[0017] The adjustment assembly includes multiple annular pads, with the top of the annular pads fixedly connected to the bottom of the water outlet, and countersunk screws threaded to the left and right sides of the bottom of the annular pads.

[0018] The above technical solution involves connecting multiple annular blocks end to end. As the countersunk screw is rotated, the gap between the annular blocks gradually increases, thus adjusting the height of the filter element.

[0019] As a further description of the above technical solution:

[0020] The support mechanism includes a central rod, the top of which is fixedly connected to the bottom of the top cover, a spiral blade is fixedly connected to the outer wall of the central rod, and a flow guide assembly is provided at the bottom of the central rod.

[0021] The above technical solution allows the central rod to axially support the entire filter element, preventing deformation, and the spiral blades to guide the fluid to flow down at a uniform speed during the filtration process.

[0022] As a further description of the above technical solution:

[0023] The flow guiding assembly includes a flow guiding shroud, the top of which is fixedly connected to the bottom of the central rod, and multiple flow guiding grooves are provided on the outer side of the flow guiding shroud.

[0024] The above-mentioned technical solution uses a flow guide shroud to first evenly disperse the falling fluid along the conical surface, and then allow it to flow out through the flow guide grooves on its surface.

[0025] As a further description of the above technical solution:

[0026] The flow-guiding woven mesh is fixedly connected between the outer frame and the adjacent parts of the filter membrane. The top of the flow-guiding woven mesh is fixedly connected to the bottom of the top cover, and the bottom of the flow-guiding woven mesh is fixedly connected to the top of the lower end cover.

[0027] The above technical solution involves fixing the flow-guiding woven mesh between the top cover and the bottom cover, which can fully cover the incoming liquid and ensure uniform filtration.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, the outer skeleton provides external support for the filter membrane, the flow-guiding woven mesh guides the liquid to pass through evenly, and then the filter membrane performs high-precision filtration on the flowing liquid. At the same time, the supporting woven mesh increases the structural strength of the filter membrane while filtering, realizing the stable operation of the filter element in high temperature and strong corrosion environment, effectively extending the service life of the filter element, while ensuring high purity filtration effect and guaranteeing filtration stability.

[0030] 3. In this utility model, the installation position is positioned by triangular fins and the top support strength is enhanced by a triangular structure. Pressing the lower end cover causes the annular boss to engage with the annular groove to complete the fixation. When the liquid flows out of the outlet in a directional manner, the flow guiding component avoids the flow direction disorder. The sealing ring and the sealing groove cooperate to prevent leakage. Rotating the countersunk screw adjusts the spacing of the annular pads to change the height of the filter element. This achieves the effect of precise installation positioning and stable liquid flow, ensuring that the filtration system is installed firmly, operates efficiently and has strong sealing performance under different working conditions. Attached Figure Description

[0031] Figure 1 This is a front view of the folded polytetrafluoroethylene composite microporous filter element proposed in this utility model;

[0032] Figure 2 This is a perspective view of the folded polytetrafluoroethylene composite microporous filter membrane element proposed in this utility model.

[0033] Figure 3 This is a cross-sectional view of the folded polytetrafluoroethylene composite microporous filter element proposed in this utility model.

[0034] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0035] Figure 5 This is a schematic diagram of the structure of the folded polytetrafluoroethylene composite microporous filter membrane element proposed in this utility model.

[0036] Legend:

[0037] 1. Top cover; 2. Filtration mechanism; 201. Outer frame; 202. Flow guide braided mesh; 203. Filter membrane; 204. Support braided mesh; 205. Inner frame; 3. Installation mechanism; 301. Triangular fins; 302. Lower end cover; 303. Outlet; 304. Fixing component; 3041. Annular boss; 3042. Annular groove; 305. Sealing component; 3051. Sealing ring; 3052. Sealing groove; 306. Adjustment component; 3061. Annular pad; 3062. Countersunk screw; 4. Support mechanism; 401. Center rod; 402. Spiral blade; 403. Flow guide component; 4031. Flow guide cover; 4032. Flow guide groove. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Reference Figure 2 , Figure 3 and Figure 5 This utility model provides an embodiment of a folded polytetrafluoroethylene composite microporous filter element, including a top cover 1 for fixing the filter element. A filtration mechanism 2 is disposed at the bottom of the top cover 1 and is used to filter liquid. The filtration mechanism 2 includes an outer frame 201, the top of which is fixedly connected to the bottom of the top cover 1 to provide external support for the filter membrane 203. A flow-guiding woven mesh 202 is fixedly connected to the inner side of the outer frame 201, guiding the liquid to pass through evenly. A filter membrane 203 is fixedly connected to the inner side of the flow-guiding woven mesh 202, performing high-precision filtration on the flowing liquid. A support woven mesh 204 is fixedly connected to the inner side of the filter membrane 203, supporting the liquid as it passes through. While filtering, the structural strength of the filter membrane 203 is increased. The flow guide braided mesh 202 is fixedly connected between the outer skeleton 201 and the adjacent filter membrane 203. The top of the flow guide braided mesh 202 is fixedly connected to the bottom of the top cover 1, and the bottom of the flow guide braided mesh 202 is fixedly connected to the top of the lower end cover 302, making the flow path more stable and ensuring smooth liquid passage. The inner skeleton 205 is fixedly connected to the inner side of the supporting braided mesh 204. The inner skeleton 205 provides inner support for the filter membrane 203. The installation mechanism 3 is set at the bottom of the filtration mechanism 2. The installation mechanism 3 is used to install the filter element onto the filtration equipment. The support mechanism 4 is set at the bottom of the top cover 1. The support mechanism 4 is used to support the filtration device and evenly distribute the weight of the filtration device.

[0040] Specifically, the liquid to be filtered first enters through the top of the filter element fixed by the top cover 1, which secures the filter structure. Then, the liquid flows into the area between the outer skeleton 201 and the flow-guiding braided mesh 202. The outer skeleton 201 provides external support for the filter membrane 203, and the flow-guiding braided mesh 202 guides the liquid to pass through evenly. Subsequently, the liquid passes through the flow-guiding braided mesh 202 and enters the filter membrane 203, where it undergoes high-precision filtration. The filtered liquid then passes through the supporting braided mesh 204, which increases the structural strength of the filter membrane 203 while filtering. The inner skeleton 205 provides internal support for the filter membrane 203, ensuring its structural stability. The top of the filter membrane 203 is fixed to the bottom of the top cover 1, and its bottom is fixed to the top of the lower end cover 302, making filtration more comprehensive and ensuring smooth liquid flow.

[0041] Reference Figure 1 , Figure 2 and Figure 4 The installation mechanism 3 includes triangular fins 301, which are responsible for positioning the filter element. The bottom of the triangular fins 301 is fixedly connected to the top of the top cover 1. The triangular structure design enhances the structural stability of the top of the filter element. A lower end cover 302 is slidably connected to the bottom of the outer frame 201. The lower end cover 302 and the top cover 1 cooperate to fix the filter mechanism 2. An outlet 303 is fixedly connected to the bottom of the lower end cover 302 for directional flow of the filtered liquid. A fixing component 304 is provided on the inner side of the 02. The fixing component 304 is used for quick installation and removal of the lower end cover 302. The fixing component 304 includes an annular boss 3041, which fixes the lower end cover 302 through the protruding structure. The inner side of the annular boss 3041 is fixedly connected to the outer bottom of the outer frame 201. An annular groove 3042 is provided on the inner side of the lower end cover 302. The outer frame 201 and the lower end cover 302 are connected by the cooperation of the annular boss 3041 and the annular groove 3042. For a stable connection, a sealing component 305 is provided on the outside of the outlet 303. The sealing component 305 is used to seal the interface of the filter device. The sealing component 305 includes two sealing rings 3051. The inner sides of the two sealing rings 3051 are fixedly connected to the upper and lower ends of the outer side of the outlet 303, respectively. Sealing grooves 3052 are provided on the upper and lower ends of the outer side of the outlet 303. The sealing rings 3051 and the sealing grooves 3052 cooperate to prevent liquid leakage at the interface. An adjustment component 306 is provided at the bottom of the outlet 303. The adjustment component 306 is responsible for adjusting the length of the interface. The adjustment component 306 includes multiple annular pads 3061. The multiple annular pads 3061 are connected end to end. The top of the top annular pad 3061 is fixedly connected to the bottom of the outlet 303. The bottom left and right sides of the annular pads 3061 are threaded with countersunk screws 3062. By rotating the countersunk screws 3062, the height of the overall annular pads 3061 is adjusted, thereby adjusting the overall height of the filter element.

[0042] Specifically, during filter element installation, the triangular fins 301 position the filter element, while the triangular structure enhances the structural stability of the top of the filter element. Pressing the lower end cover 302 causes the annular boss 3041 to engage with the annular groove 3042 inside the lower end cover 302, thus fixing the lower end cover 302 to the filter element. The fixing component 304 enables quick installation and removal of the lower end cover 302. The filtered liquid flows out directionally through the outlet 303 at the bottom of the lower end cover 302. On the outside of the outlet 303, the sealing ring 3051 is fixedly connected to the sealing groove 3052 to prevent liquid leakage at the interface. When it is necessary to adjust the overall height of the filter element, multiple annular blocks 3061 are connected end to end. By rotating the countersunk screws 3062, the spacing between the annular blocks 3061 is increased, thereby adjusting the overall height of the annular blocks 3061 and thus adjusting the overall height of the filter element.

[0043] Reference Figure 4 and Figure 5 The support mechanism 4 includes a central rod 401, which supports the filter membrane 203. The top of the central rod 401 is fixedly connected to the bottom of the top cover 1, providing stable vertical support for the entire support structure 4. A spiral blade 402 is fixedly connected to the outer wall of the central rod 401, which guides the liquid to form a swirling flow through the spiral structure. A flow guiding component 403 is provided at the bottom of the central rod 401, which guides the filtered liquid to flow out. The flow guiding component 403 includes a flow guiding cover 4031, which can disperse the liquid flow path. The top of the flow guiding cover 4031 is fixedly connected to the bottom of the central rod 401, which disperses and guides the liquid entering the bottom of the filter element. Multiple flow guiding grooves 4032 are opened on the outer side of the flow guiding cover 4031, and the dispersed liquid flows out evenly from the flow guiding grooves 4032.

[0044] Specifically, the central rod 401 is the main body of the entire support mechanism, providing support for the entire filtration device during the filtration process. When the liquid flows through the filter element, the spiral blades 402 fixedly connected to the outer wall of the central rod 401 guide the liquid downward through the spiral structure. Subsequently, the filtered liquid flows to the flow guide assembly 403 at the bottom of the central rod 401. The flow guide cover 4031 disperses the liquid entering the bottom of the filter element in all directions, and the flow guide groove 4032 evenly discharges the dispersed liquid.

[0045] Working principle: When the folded filter element is working, the top cover 1 first fixes the filter element, and the outer frame 201 provides external support for the filter membrane 203. When the fluid to be filtered enters the filter element, the flow guide braided mesh 202 guides the liquid to pass through evenly. Then, the filter membrane 203, which is fixedly connected to the inner side of the flow guide braided mesh 202, performs high-precision filtration on the flowing liquid. At the same time, the support braided mesh 204 increases the structural strength of the filter membrane 203 while filtering. The filter layer is between the inner frame 205 and the outer frame 201, which enhances the structural strength of the filter. During the filtration process, the central rod 401 provides vertical support, the spiral blades 402 guide the liquid to form a swirling flow through the spiral structure, the flow guide cover 4031 disperses and guides the filtered liquid, and finally it flows out evenly from the flow guide groove 4032.

[0046] Furthermore, the triangular fins 301 position the filter element and enhance the top support strength. Pressing the lower end cover 302 causes the annular boss 3041 to engage with the annular groove 3042 inside the lower end cover 302, thus fixing the lower end cover 302 to the filter element and enabling convenient quick assembly and disassembly. The filtered liquid flows out directionally through the outlet 303 at the bottom of the lower end cover 302. The flow guide component 403 prevents the flow direction from becoming disordered. On the outside of the outlet 303, the sealing ring 3051 and the sealing groove 3052 cooperate to prevent liquid leakage at the interface, ensuring the sealing of the filtration system. When it is necessary to adjust the overall height of the filter element, multiple annular blocks 3061 are connected end to end. By rotating the countersunk screws 3062, the spacing between the annular blocks 3061 can be increased or decreased, thereby adjusting the overall height of the annular blocks 3061 and flexibly adjusting the overall height of the filter element to adapt to different installation space requirements.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pleated polytetrafluoroethylene composite microporous filter membrane element, comprising a top cover (1), characterized in that: The bottom of the top cover (1) is provided with a filter mechanism (2), which is used to filter liquid. The bottom of the filter mechanism (2) is provided with an installation mechanism (3), which is used to install the entire device. The bottom of the top cover (1) is provided with a support mechanism (4). The filtration mechanism (2) includes an outer frame (201), the top of which is fixedly connected to the bottom of the top cover (1). A flow-guiding woven mesh (202) is fixedly connected to the inner side of the outer frame (201), a filter membrane (203) is fixedly connected to the inner side of the flow-guiding woven mesh (202), a support woven mesh (204) is fixedly connected to the inner side of the filter membrane (203), and an inner frame (205) is fixedly connected to the inner side of the support woven mesh (204).

2. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 1, characterized in that: The installation mechanism (3) includes a triangular fin (301), the bottom of which is fixedly connected to the top of the top cover (1). The outer bottom of the outer frame (201) is slidably connected to a lower end cover (302). The bottom of the lower end cover (302) is fixedly connected to a water outlet (303). A fixing component (304) is provided on the inner side of the lower end cover (302). A sealing component (305) is provided on the outer side of the water outlet (303). An adjustment component (306) is provided at the bottom of the water outlet (303).

3. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 2, characterized in that: The fixing component (304) includes an annular boss (3041), the inner side of which is fixedly connected to the outer bottom of the outer frame (201), and the inner side of the lower end cover (302) is provided with an annular groove (3042).

4. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 2, characterized in that: The sealing assembly (305) includes two sealing rings (3051), the inner sides of the two sealing rings (3051) are respectively fixedly connected to the upper and lower outer ends of the water outlet (303), and the upper and lower outer ends of the water outlet (303) are provided with sealing grooves (3052).

5. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 2, characterized in that: The adjustment component (306) includes multiple annular pads (3061), the top of the annular pad (3061) is fixedly connected to the bottom of the outlet (303), and countersunk screws (3062) are threaded to the left and right sides of the bottom of the annular pad (3061).

6. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 1, characterized in that: The support mechanism (4) includes a central rod (401), the top of which is fixedly connected to the bottom of the top cover (1), a spiral blade (402) is fixedly connected to the outer wall of the central rod (401), and a flow guide assembly (403) is provided at the bottom of the central rod (401).

7. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 6, characterized in that: The flow guiding assembly (403) includes a flow guiding shroud (4031), the top of which is fixedly connected to the bottom of the central rod (401), and a plurality of flow guiding grooves (4032) are provided on the outer side of the flow guiding shroud (4031).

8. The pleated polytetrafluoroethylene composite microporous filter membrane element according to claim 2, characterized in that: The flow-guiding woven mesh (202) is fixedly connected between the outer frame (201) and the adjacent filter membrane (203). The top of the flow-guiding woven mesh (202) is fixedly connected to the bottom of the top cover (1), and the bottom of the flow-guiding woven mesh (202) is fixedly connected to the top of the lower end cover (302).

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