A large flow transversely pleated filter cartridge

Abstract

The utility model discloses a large flow transverse folding filter element. The large flow transverse folding filter element comprises a center tube, a through hole is arranged on the tube wall, a filter layer is formed by repeatedly folding filter material along the length direction and surrounds the transverse wrinkle structure of the center tube, the extension direction of the transverse wrinkle is perpendicular to the axial direction of the center tube, so that the filter layer forms a plurality of layers of circumferential filter surfaces in the radial direction, and an outer layer protection assembly is sleeved on the outer periphery of the filter layer. The large flow transverse folding filter element can provide more effective filter area, the filter design can be more compact and miniaturized, conforms to the development trend of modern industrial equipment intensification, the transverse wrinkle structure is uniformly supported in the circumferential direction by the inner support assembly and the outer layer protection assembly, each wrinkle is like an independent support ring, the overall structure is rigid, can effectively resist large flow impact and water hammer effect, and completely eliminates the risks of "collapse" and "folding".

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a high-flow-rate transversely pleated filter. Background Technology

[0002] With the deepening of industrialization and urbanization, the volume of water to be treated in fields such as industrial circulating water, municipal water supply, and seawater desalination pretreatment is becoming increasingly large.

[0003] The filter element is the core component of a filtration system, and its performance directly determines filtration efficiency, energy consumption, and equipment size. Currently, most mainstream high-efficiency filter elements on the market adopt an axial (longitudinal) pleated structure, that is, folded along the width of the filter media to increase the filtration area. This traditional longitudinally pleated filter element has the following shortcomings: 1. The effective area increase is limited, and its fold depth is limited by the inner and outer diameters of the filter element. Under a given size, there is a physical limit to the increase in area.

[0004] 2. Insufficient structural stability: When subjected to large flow impacts or pressure fluctuations, the long and fragile folds are prone to collapse, folding, or even breaking at the root, resulting in a sharp reduction in the effective filtration area and a rapid increase in pressure loss.

[0005] Therefore, it is necessary to provide a high-flow-rate, horizontally pleated filter element to solve the above-mentioned technical problems. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a high-flow transverse pleated filter element that can provide more effective filtration area and improve the stability of filter element use.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-flow transversely pleated filter element includes: a central tube with through holes in its wall; a filter layer formed by repeatedly folding filter media along its length and forming a transverse pleated structure around the central tube; the extension direction of the transverse pleats is perpendicular to the axial direction of the central tube, so that the filter layer forms a multi-layered filter surface in the radial direction; and an outer protective component fitted around the outer periphery of the filter layer.

[0008] Preferably, the transverse pleated structure of the filter layer is continuous and uniform, wavy, sawtooth, or trapezoidal.

[0009] Preferably, the outer protective component has a porous or mesh structure that is attached to the outer surface of the filter layer to provide radial support.

[0010] Preferably, the outer protective component is a plastic injection-molded mesh, stainless steel woven mesh, or perforated steel plate wound into a cylindrical shape.

[0011] Preferably, the two ends of the filter layer are sealed and fixed by an upper end cap and a lower end cap.

[0012] Preferably, the filter material of the filter layer is one of meltblown polypropylene, glass fiber, polyester nonwoven fabric or filter paper.

[0013] Preferably, an outer support component is provided between the outer protective component and the filter layer to support the wrinkles of the filter layer from the outside.

[0014] Preferably, an inner support assembly is provided between the central tube and the filter layer to support the folds of the filter layer from the inside.

[0015] Preferably, both the outer support assembly and the inner support assembly are ring-shaped frame structures to reduce resistance and increase the fluid flow rate.

[0016] Preferably, the outer support assembly is a ring structure consisting of an outer contact ring, an inner support ring, two first auxiliary support rings, and multiple first cross connecting rods.

[0017] Preferably, the inner support assembly is a ring structure consisting of an inner contact ring, an outer support ring, two second auxiliary support rings, and multiple second cross connecting rods.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) This utility model can provide more effective filtration area, making the filter design more compact and miniaturized, which is in line with the development trend of modern industrial equipment intensification; (2) The transverse folded structure of this utility model is uniformly circumferentially supported by the inner support component and the outer protective component. Each fold is like an independent support ring. The overall structure has good rigidity and can effectively resist the impact of large flow and water hammer effect, completely eliminating the risk of "collapse" and "folding". (3) The transverse pleated structure of this utility model makes the fluid flow path extremely short, basically a "radial penetration" mode. The flow path is much shorter than the "winding" path of traditional axial pleats. In addition, the huge total flow area makes the filter element have extremely low initial pressure drop and operating pressure drop, resulting in significant energy saving effect under high flow rate. (4) The large effective filtration area of ​​this utility model reduces the clogging load per unit area. At the same time, the flow channel is short and uniform, and the pollutants can be more evenly distributed across the entire large filtration surface, avoiding localized rapid clogging, thereby significantly extending the service life of the filter element; (5) By setting up external support components and internal support components, this utility model can effectively improve the stability of the device. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the high-flow transversely pleated filter element provided by this utility model; Figure 2 for Figure 1 The diagram shows a partial cross-sectional view of a high-flow-rate transversely pleated filter element. Figure 3 This is a schematic diagram of the filter layer structure; Figure 4 This is a schematic diagram of the external support component. Figure 5 This is a schematic diagram of the internal support component.

[0020] The corresponding names of the reference numerals in the attached drawings are: 1-outer protective component, 2-filter layer, 3-center tube, 4-upper end cap, 5-lower end cap, 6-outer support component, 7-inner support component, 61-outer contact ring, 62-first auxiliary support ring, 63-inner support ring, 64-first cross connecting rod, 71-inner contact ring, 72-second auxiliary support ring, 73-outer support ring, 74-second cross connecting rod. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0022] Example 1: like Figure 1-5 As shown, the high-flow-rate transversely pleated filter element provided by this utility model includes: a central tube 3, made of injection-molded plastic, with densely packed through holes on the tube wall as the outflow channel for the purified fluid; a filter layer 2, formed by repeatedly folding filter media along its length to create a transversely pleated structure surrounding the central tube 3; the extension direction of the transverse pleats is perpendicular to the axial direction of the central tube 3, so that the filter layer 2 forms a multi-layered surrounding filter surface in the radial direction; and an outer protective component 1, fitted around the outer periphery of the filter layer 2. The transversely pleated structure of the filter layer 2 is continuous and uniform, wavy, sawtooth, or trapezoidal; this embodiment uses a wavy shape as an example. The outer protective component 1 is a porous or mesh structure, which adheres to the outer surface of the filter layer 2 to provide radial support. The outer protective component 1 is wound into a cylindrical mesh structure, and the material can be selected according to actual needs. The two ends of the filter layer 2 are sealed and fixed by the upper end cap 4 and the lower end cap 5, and one end of the central tube 3 passes through the upper end cap 4 and is sealed and fixed. The two ends of the outer protective component 1 are also fixed to the upper end cap 4 and the lower end cap 5. The filter material of the filter layer 2 is one of meltblown polypropylene, glass fiber, polyester nonwoven fabric or filter paper, which can be selected according to actual needs, and will not be described in detail here. An inner support component 7 is provided between the central tube 3 and the filter layer 2 to support the folds of the filter layer 2 from the inside.

[0023] During manufacturing, a wide filter media (such as meltblown polypropylene) is first continuously and precisely folded along its length to form transverse pleats of a specific depth H. A sufficient number of inner support components 7 are then fitted onto the central tube 3 according to the distance and number of pleats. This folded filter media strip is then wound around the central tube 3 with its pleat direction parallel to the future axis of the central tube 3 until the desired outer diameter is achieved. Ultimately, the filter layer 2 forms a multi-layered, radially surrounding filter surface, with the inner support components 7 supporting the filter layer 2 from the inside within the pleats of the filter surface and the central tube 3. An outer protective mesh is tightly fitted over the wound filter layer 2. This protective mesh can be a plastic injection-molded mesh, a stainless steel woven mesh, or a perforated steel plate. Its function is to constrain the transverse pleats of the filter layer 2, preventing excessive expansion or deformation under external pressure or pressure differential, and ensuring structural stability. Finally, polyurethane or other materials are used to fill both ends of the filter element to form an upper end cap 4 and a lower end cap 5, which encapsulates the central tube 3, filter layer 2, inner support component 7, and outer protective component 1 into a whole, and ensures that unfiltered fluid will not short-circuit into the central tube 3.

[0024] Compared to conventional axial (longitudinal) pleated structures, this invention provides a larger effective filtration area, allowing for a more compact and miniaturized filter design, aligning with the trend of modern industrial equipment intensification. The transverse pleated structure is uniformly supported circumferentially by the inner support component 7 and the outer protective component 1, with each pleat acting as an independent support ring. This results in excellent overall structural rigidity, effectively resisting high-flow-rate impacts and water hammer effects, completely eliminating the risks of collapse and folding. The transverse pleated structure also results in an extremely short fluid flow path, essentially a radial penetration pattern, far shorter than the winding path of traditional axial pleats. Combined with the large total flow area, this leads to extremely low initial and operating pressure drops, resulting in significant energy savings under high flow rates. The large effective filtration area reduces the fouling load per unit area. Simultaneously, the short and uniform flow channels allow for more even distribution of contaminants across the entire large filtration surface, preventing rapid localized clogging and significantly extending the filter's lifespan.

[0025] Example 2: like Figure 1-5 As shown, an outer support component 6 is provided between the outer protective component 1 and the filter layer 2 to support the folds of the filter layer 2 from the outside. The outer support component 6, like the inner support component 7, is a ring-shaped frame structure and there are multiple of them.

[0026] During manufacturing, it is important to clarify that the outer protective component 1 is made of two semi-ring structures welded or glued together. The semi-ring structures can be manufactured by injection molding or welding. During installation, the two semi-rings are fastened to the folds of the filter layer 2 and glued together to form an outer protective component 1, which supports the filter layer 2 from the outside, especially the middle of the folds. This is consistent with the function of the inner support component 7. When encountering large water pressure fluctuations, it can effectively prevent the filter layer 2 from deforming. It can also effectively support the filter layer 2 and prevent it from deforming during backwashing.

[0027] Example 3: like Figure 3-4 As shown, the outer support assembly 6 is a ring-shaped structure composed of an outer contact ring 61, an inner support ring 63, two first auxiliary support rings 62, and multiple first cross connecting rods 64. It is formed by bonding two equal semi-ring structures together. In use, the two semi-ring structures are fastened to the folds and glued together. The outer contact ring 61 abuts against the inner side of the outer protective assembly, the inner support ring 63 abuts against the lowest point of the folds in the filter layer 2, and the two first auxiliary support rings 62 abut against the middle of the folds. This effectively supports the folds in the filter layer 2 from the outside, preventing deformation of the filter layer 2 at the folds (especially in the middle of the folds). This improves the deformation resistance of the filter layer 2, which is particularly important during backwashing.

[0028] By setting the external support assembly 6 into a ring structure consisting of an outer contact ring 61, an inner support ring 63, two first auxiliary support rings 62 and multiple first cross connecting rods 64, the filter layer 2 can be effectively supported from the outside, improving the stability of the device.

[0029] Example 4: like Figure 3-5 As shown, the inner support assembly 7 is a ring-shaped structure consisting of an inner contact ring 71, an outer support ring 73, two second auxiliary support rings 72, and multiple second cross connecting rods 74. It is manufactured using an adhesive or welding process. In use, the inner contact ring 71 is fitted onto the central tube 3, the outer support ring 73 abuts against the highest point of the folds in the filter layer 2, and the two second auxiliary support rings 72 abut against the middle of the folds, thereby effectively supporting the folds in the filter layer 2 from the inside and preventing the filter layer 2 from deforming at the folds (especially in the middle of the folds).

[0030] By setting the inner support assembly 7 into a ring structure consisting of an inner contact ring 71, an outer support ring 73, two second auxiliary support rings 72 and multiple second cross connecting rods 74, the filter layer 2 can be effectively supported from the inside, improving the stability of the device.

[0031] Working principle: During use, the fluid to be filtered passes through the outer protective component 1 from the outside of the filter element and radially penetrates the transverse folds of the filter layer 2. Contaminants are trapped on the large surface of the filter layer 2, while the clean fluid continues to flow radially inward. After passing through the inner support component 7, it finally enters the inner cavity of the central tube 3 through the through hole on the wall of the central tube 3 and flows out from one end.

Claims

1. A high-flow-rate transversely pleated filter element, characterized in that, include: The central tube (3) has a through hole in its wall; The filter layer (2) is formed by repeatedly folding the filter material along its length and forming a transverse pleated structure around the central tube (3); the extension direction of the transverse pleats is perpendicular to the axial direction of the central tube (3), so that the filter layer (2) forms a multi-layered surrounding filter surface in the radial direction. The outer protective component (1) is sleeved on the outer periphery of the filter layer (2).

2. The high-flow-rate transversely pleated filter element according to claim 1, characterized in that, The transverse pleated structure of the filter layer (2) is continuous and uniform, wavy, sawtooth or trapezoidal.

3. The high-flow-rate transversely pleated filter element according to claim 1, characterized in that, The outer protective component (1) has a porous or mesh structure and is attached to the outer surface of the filter layer (2) to provide radial support.

4. A high-flow-rate transversely pleated filter element according to claim 1, characterized in that, The outer protective component (1) is a plastic injection-molded mesh, stainless steel woven mesh, or perforated steel plate wound into a cylindrical shape.

5. A high-flow-rate transversely pleated filter element according to claim 1, characterized in that, The two ends of the filter layer (2) are sealed and fixed by the upper end cap (4) and the lower end cap (5).

6. A high-flow-rate transversely pleated filter element according to claim 1, characterized in that, The filter material of the filter layer (2) is one of meltblown polypropylene, glass fiber, polyester nonwoven fabric or filter paper.

7. A high-flow-rate transversely pleated filter element according to claim 1, characterized in that, An outer support component (6) is provided between the outer protective component (1) and the filter layer (2).

8. A high-flow-rate transversely pleated filter element according to claim 1, characterized in that, An internal support assembly (7) is provided between the central tube (3) and the filter layer (2).

9. A high-flow-rate transversely pleated filter element according to claim 7, characterized in that, The outer support assembly (6) is a ring structure consisting of an outer contact ring (61), an inner support ring (63), two first auxiliary support rings (62) and multiple first cross connecting rods (64).

10. A high-flow-rate transversely pleated filter element according to claim 8, characterized in that, The inner support assembly (7) is a ring structure consisting of an inner contact ring (71), an outer support ring (73), two second auxiliary support rings (72) and multiple second cross connecting rods (74).

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