A folding filter element structure

Abstract

The utility model relates to a kind of folding filter core structure, the filter core structure includes filter membrane, the fan ring structure of first state is unfolded to filter membrane, the fan ring structure includes the straight edge of both sides and multiple fold lines on surface, after folding along the fold line and the straight edge is mutually connected coincident, the change of filter membrane first state to second state is realized.This new type is designed by using the filter membrane of fan ring structure unfolding, and the fold line of equidistance setting and with inner and outer arc same center is transversely folded, so that filter membrane forms the uniform structure expanding from top to bottom after folding, significantly improve the folding density and effective filtration area in unit space;Meanwhile, the bidirectional support system of inner support and outer support effectively inhibits filter membrane radial deformation and stress concentration, and first cover, second cover and positioning fin enhance sealing, pressure resistance and installation stability, improve filtration efficiency, structural reliability and service life.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a folded filter structure. Background Technology

[0002] The filter element is made of pleated microporous filter cartridges, featuring high retention rate, high flow rate, low pressure drop, and broad chemical compatibility. Its manufacturing process utilizes a unique hot-melt welding technique, eliminating the use of any adhesives and preventing the release of foreign matter. It is widely used in the pharmaceutical, food, electronics, and chemical industries.

[0003] Currently, the filter cartridges on the market have a relatively uniform style, all using 10-inch, 20-inch, and 30-inch plastic shell sleeves. However, the traditional folding method is limited by the filter shell, so it adopts vertical folding. When the core is full, the number of folds of the filter cartridge cannot be increased, which leads to little difference in filtration area. And filtration area affects filtration efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a folded filter element structure to solve one or more problems in the prior art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A folded filter element structure includes a filter membrane. The filter membrane unfolds into a fan-ring structure in a first state. The fan-ring structure includes straight edges on both sides and multiple fold lines on the surface. After folding along the fold lines, the straight edges are connected and overlapped to realize the transformation of the filter membrane from the first state to the second state.

[0006] Furthermore, in the first state, the filter membrane forms a first arc and a second arc between the straight edge endpoints on both sides.

[0007] Furthermore, in the first state, the broken line is equidistant from the straight edge and is centered on the first arc and the second arc.

[0008] Furthermore, in the second state, the filter membrane has three fold lines forming a folded edge.

[0009] Furthermore, the filter membrane in the second state has a uniformly varying end face area along the first direction.

[0010] Furthermore, the filter membrane forms channels in the second state, and the filter element structure further includes an inner support, which is disposed in the channels along a first direction.

[0011] Furthermore, the filter element structure also includes an external support, which is externally connected to the filter membrane in the second state.

[0012] Furthermore, the filter element structure also includes a first cover and a second cover, which are respectively disposed at both ends of the outer support in a first direction.

[0013] Furthermore, the two ends of the inner support are respectively fixed to the first cover and the second cover.

[0014] Furthermore, the filter element structure also includes positioning fins, which are connected to the first cover.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows: This novel filter membrane design employs a fan-shaped ring structure and folds laterally along equidistant fold lines concentric with the inner and outer arcs. This results in a uniform structure that expands from top to bottom after folding, significantly increasing the folding density and effective filtration area per unit space. Simultaneously, the bidirectional support system of inner and outer supports effectively suppresses radial deformation and stress concentration of the filter membrane, while the first cover, second cover, and positioning fins enhance sealing, pressure resistance, and installation stability, thereby improving filtration efficiency, structural reliability, and service life. Attached Figure Description

[0016] Figure 1 This diagram shows a partial cross-sectional view of the overall structure of a folded filter element according to an embodiment of the present invention.

[0017] Figure 2 A partial cross-sectional view of a folded filter element structure according to an embodiment of the present invention is shown.

[0018] Figure 3 This diagram shows a structural schematic of a folded filter membrane in its first state according to an embodiment of the present invention.

[0019] Figure 4 The diagram shows a second state of a folded filter element structure according to an embodiment of the present invention.

[0020] Figure 5 An enlarged view of the folded edge of a folded filter element structure according to an embodiment of the present invention is shown.

[0021] The following labels are used in the attached diagram: 1. Filter membrane; 11. Straight edge; 12. First arc; 13. Second arc; 14. Fold line; 15. Folded edge; 2. Inner support; 3. Outer support; 4. First cover; 5. Second cover; 6. Positioning fin. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description of a folded filter element structure proposed by this utility model, in conjunction with the accompanying drawings and specific embodiments, will further illustrate its purpose. The advantages and features of this utility model will become clearer from the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0023] Please see Figures 1 to 5 The folded filter element structure of this embodiment includes a filter membrane 1, such as... Figure 3 As shown, the filter membrane 1 unfolds into a fan-ring structure in its first state. The fan-ring structure includes straight edges 11 on both sides and multiple fold lines 14 on its surface. In the first state, the filter membrane 1 forms a first arc 12 and a second arc 13 between the endpoints of the straight edges 11. In this embodiment, the first arc 12 is an inner arc, and the second arc 13 is an outer arc. The fold lines 14 are equidistant from the straight edges 11 in the first state and are concentric with the first arc 12 and the second arc 13. The fold lines 14 provide precise guidance for subsequent folding operations. When folded along the fold lines 14 and the straight edges 11 are connected and overlapped, the filter membrane 1 transitions from its first state to its second state. Figure 4 The second state is shown.

[0024] When folding along the fold line 14, since the fold line 14 is concentric with the first arc 12 and the second arc 13, the stress and deformation of each part of the filter membrane 1 are more uniform during the folding process, thus avoiding the problem of damage to the filter membrane 1 or irregular folding shape caused by uneven folding.

[0025] Furthermore, in the second state, the filter membrane 1 has three fold lines 14 forming a folded edge 15. The fold lines 14 are equidistant from the straight edge 11, which ensures that the spacing of the folded edge 15 is consistent after folding, further guaranteeing the structural stability and symmetry of the filter membrane 1 in the second state.

[0026] Furthermore, in the second state, the filter membrane 1 forms channels, and the end face area of ​​the filter membrane 1 changes uniformly along the first direction in the second state. In this embodiment, the first direction is the axial direction of the channels, which is also... Figure 4 The up and down directions within. From Figure 4 As shown, the filter membrane 1, after being folded in the first direction, increases in size concentrically from top to bottom. This can be understood as folding from top to bottom. In two adjacent folds, the lower fold is more prominent than the upper fold, and this process repeats. Preferably, by setting appropriate fold height and number of folds during folding, and by setting appropriate height and pore size of the filter membrane 1 in the first direction in the second state, the contact area and fluid flow path of the filter membrane 1 during the filtration process can be effectively adjusted, thereby optimizing the filtration efficiency and throughput of the filter element. The fold height directly affects the unfolded area of ​​the filter membrane 1, while the number of folds determines the fold density of the filter membrane 1 per unit space. The matching of the height in the first direction with the pore size ensures that the fluid forms a stable laminar flow state within the pores, reducing the interference of eddies on the filtration effect. Through the coordinated design of multiple parameters, the filter element can achieve a larger effective filtration area within a limited installation space, while ensuring uniform resistance distribution during fluid flow, avoiding excessive local pressure that could damage the filter membrane 1, and extending the service life of the filter element.

[0027] Furthermore, the filter element structure also includes an inner support 2, which is disposed within the pores along a first direction. The filter element structure also includes an outer support 3, which is externally connected to the filter membrane 1 in the second state. Preferably, the inner support 2 is made of high-strength plastic material, and its surface can be uniformly distributed with axial reinforcing ribs to provide stable structural support for the pores. The inner support 2 has a similar external design to the outer support 3, and in practice, it has pores to allow the medium to flow from the outer support 3, be filtered by the filter membrane 1, and then flow out from the inner support 2. The outer support 3 is designed as a mesh cylindrical structure, processed from corrosion-resistant metal material. By abutting against the outer periphery of the filter membrane 1, it can effectively limit the radial expansion of the filter membrane 1 during the filtration process, avoiding stress concentration at the fold line 14 due to excessive deformation. The combined arrangement of the inner support 2 and the outer support 3 forms a bidirectional support system for the filter membrane 1, further improving the overall compressive strength and structural reliability of the filter element.

[0028] Furthermore, the filter element structure also includes a first cover 4 and a second cover 5, which are respectively disposed at both ends of the outer support 3 in a first direction. The inner support 2 is fixedly connected to the first cover 4 and the second cover 5 at both ends, preferably by heat fusion to form an integral part with the first cover 4 and the second cover 5. The first cover 4 and the second cover 5 are also connected to the ends of the outer support 3 to form an integral part, effectively preventing leakage of the fluid to be filtered. The fixed connection design of the inner support 2 with the first cover 4 and the second cover 5 avoids interference of the support structure with the folded state of the filter membrane 1, and also reserves a buffer space for the axial flow of fluid in the channel, reducing the impact damage of the filter membrane 1 caused by the local eddy current generated by the sudden change in flow velocity. The filter membrane 1 is disposed in the space formed by the inner support 2 and the outer support 3. Preferably, the two ends of the filter membrane 1 are also heat-fused to the end face of the outer support 3, thereby separating the inner and outer layers of the filter membrane 1 to form a closed loop. The filter element structure also includes positioning fins 6, which are connected to the first cover 4. The positioning fins 6 are adapted to the mounting groove of the filtration equipment, which can realize the rapid positioning and anti-rotation function of the filter element in the equipment.

[0029] The traditional method of unfolding the filter into a rectangular vertical fold, and the method of unfolding the filter into a fan-shaped horizontal fold in this embodiment, both have a higher efficiency ratio under the same filter element specifications, filtration pressure, and filter media, as shown in the table below.

[0030]

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pleated filter element structure, characterized in that: The filter element structure includes a filter membrane, which unfolds into a fan-ring structure in a first state. The fan-ring structure includes straight edges on both sides and multiple fold lines on the surface. After folding along the fold lines, the straight edges are connected and overlapped to realize the transformation of the filter membrane from the first state to the second state.

2. The pleated filter element structure as described in claim 1, characterized in that: In the first state, the filter membrane forms a first arc and a second arc between the straight edge endpoints on both sides.

3. The pleated filter element structure as described in claim 2, characterized in that: In the first state, the broken line is equidistant from the straight edge and is centered on the first arc and the second arc.

4. The pleated filter element structure as described in claim 3, characterized in that: In the second state, the filter membrane has three fold lines forming a folded edge.

5. The pleated filter element structure as described in claim 4, characterized in that: The filter membrane undergoes a uniform change in end face area along the first direction in the second state.

6. The pleated filter element structure as described in claim 5, characterized in that: The filter membrane forms channels in the second state, and the filter element structure further includes an inner support, which is disposed in the channels along a first direction.

7. A pleated filter element structure as described in claim 6, characterized in that: The filter element structure also includes an external support, which is externally connected to the filter membrane in the second state.

8. The pleated filter element structure as described in claim 7, characterized in that: The filter element structure also includes a first cover and a second cover, which are respectively disposed at both ends of the outer support in a first direction.

9. A pleated filter element structure as described in claim 8, characterized in that: The two ends of the inner support are respectively fixed to the first cover and the second cover.

10. A pleated filter element structure as described in claim 9, characterized in that: The filter element structure also includes positioning fins, which are connected to the first cover.

Images