Stainless steel folding filter element

Abstract

This utility model discloses a stainless steel pleated filter element, relating to the field of pleated filter element technology. It includes a lower end cover, an upper end cover, and a filter cartridge body. The filter cartridge body is disposed between the lower and upper end covers. Threaded connection grooves are provided at the bottom of the lower end cover and the top of the upper end cover. A connecting ring is provided at both the upper and lower ends of the filter cartridge body. The outer wall of the connecting ring is provided with threads corresponding to the threaded connection grooves, and the connecting ring is threadedly connected to the lower and upper end covers. A through hole is provided at the center of the upper end cover. Support bars are installed inside the filter cartridge body. The lower end of the support bars is fixedly connected to the lower end cover, and the support bars are in contact with the inner wall of the filter cartridge body. This stainless steel pleated filter element has multiple sets of support bars installed inside, which contact the inner wall of the filter element, providing support and protection from the inside of the filter element, improving the filter element's pressure resistance and deformation resistance, and preventing deformation during long-term use.

Description

Technical Field

[0001] This utility model relates to the field of pleated filter technology, specifically a stainless steel pleated filter. Background Technology

[0002] Pleated filter cartridges are filter elements that increase filtration area and improve filtration efficiency through a pleating process. They are widely used in precision filtration of liquids and gases. Stainless steel pleated filter cartridges are also known as corrugated filter cartridges or pleated filter cartridges. The industrial filtration equipment field involves various types of filter cartridge designs, among which stainless steel pleated filter cartridges, as an important filtration element, play a crucial role in liquid and gas processing. These filter cartridges are typically used to filter solid particles or other impurities of different sizes to ensure smooth production processes and product quality assurance.

[0003] Chinese Patent Publication No. CN223069184U, authorized on July 8, 2025, discloses a stainless steel pleated filter element, comprising two sets of connectors, with multiple sets of metal docking cylinders connected between the two sets of connectors. Each set of metal docking cylinders has a limiting annular groove at both ends. A filter element screen cylinder that can be stretched and adjusted within the corresponding two limiting annular grooves is provided between two adjacent metal docking cylinders. The length between the two sets of connectors is achieved by stacking multiple sets of metal docking cylinders and filter element screen cylinders. In this utility model, the design adopts a modular structure, which allows for flexible adjustment of the filter element length according to the height of different filter tanks. Different installation requirements can be adapted by increasing or decreasing the number of metal docking cylinders and filter screen cylinders, and it is also convenient for cleaning, maintenance and replacement.

[0004] The existing stainless steel pleated filter cartridges lack internal support and protection structures, resulting in poor overall vertical pressure resistance and deformation resistance. Over time, dirt accumulation on the filter cartridges can easily cause deformation, reducing their service life and failing to meet usage requirements. Utility Model Content

[0005] The purpose of this utility model is to provide a stainless steel pleated filter element to solve the problems mentioned in the background art, such as the lack of internal support and protection structure in existing stainless steel pleated filter elements, poor overall vertical pressure resistance and deformation resistance, and the tendency for dirt to accumulate on the filter element during long-term use, which can easily lead to deformation of the filter element, reduce the service life of the stainless steel pleated filter element, and fail to meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stainless steel pleated filter element, comprising a lower end cover, an upper end cover, and a filter cartridge body. The filter cartridge body is disposed between the lower end cover and the upper end cover. Threaded connection grooves are provided at the bottom of the lower end cover and the top of the upper end cover. A connecting ring is provided at both the upper and lower ends of the filter cartridge body, and the connecting ring is fixedly connected to the filter cartridge body. A thread corresponding to the threaded connection groove is provided on the outer wall of the connecting ring, and the connecting ring is threadedly connected to the lower end cover and the upper end cover. A through hole is provided at the center of the upper end cover. Four support bars are installed inside the filter cartridge body, and the four support bars are equidistantly arranged inside the filter cartridge body. The lower end of each support bar is fixedly connected to the lower end cover, and the support bar is in contact with the inner wall of the filter cartridge body.

[0007] Preferably, the filter cartridge body includes a porous support cylinder and a folded filter screen, wherein the folded filter screen is disposed outside the porous support cylinder and is in close contact with the porous support cylinder.

[0008] Preferably, the upper end of the support bar is provided with a threaded hole, the upper end cover is provided with a second assembly hole, a second connecting bolt is installed inside the second assembly hole, and the second connecting bolt is slidably connected to the upper end cover. The second connecting bolt is correspondingly provided with the threaded hole, and the second connecting bolt is threadedly connected to the support bar.

[0009] Preferably, a sealing ring is installed at one end of each of the two connecting rings, and the sealing ring is in close contact with the connecting ring. The sealing ring is disposed inside the threaded connecting groove and is in close contact with the lower end cover and the upper end cover.

[0010] Preferably, a first assembly hole is provided on one side of both the lower end cover and the upper end cover, and the first assembly hole is connected to the threaded connection groove. A first connecting bolt is installed inside the first assembly hole, and the first connecting bolt is threadedly connected to the lower end cover and the upper end cover.

[0011] Preferably, a top opening retaining ring is installed at the upper end of the upper end cover, and the top opening retaining ring is integral with the upper end cover. The top opening retaining ring is located on the outside above the through hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model device features a support bar, a threaded hole, a second connecting bolt, and a second assembly hole. The second connecting bolt passes through the second assembly hole and is inserted into the threaded hole to connect with the support bar, straightening it and bringing it into contact with the inner wall of the filter cartridge body. The four support bars are evenly distributed inside the filter cartridge body, providing lateral support and improving the filter element's pressure resistance and deformation resistance, making it less prone to deformation during long-term use.

[0014] This utility model device, through the arrangement of a first connecting bolt, a threaded connecting groove, a first assembly hole, a sealing ring, and a connecting ring, enables the two ends of the filter cartridge body to be quickly connected to the lower end cover and the upper end cover with the help of the connecting ring and the threaded connecting groove. The first connecting bolt passes through the first assembly hole and has one end in contact with the connecting ring, limiting the connection of the connecting ring to the lower end cover and the upper end cover, thereby improving the connection firmness between the connecting ring and the lower end cover and the upper end cover. The sealing ring fills the connection gap between the connecting ring and the lower end cover and the upper end cover, thereby improving the sealing performance of the connection between the connecting ring and the lower end cover and the upper end cover. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a structural diagram of the filter cartridge of this utility model;

[0017] Figure 3 This is a perspective view showing the connection between the support strip and the lower end cap of this utility model.

[0018] Figure 4 This is a diagram showing the connection relationship between the filter cartridge body, support strip, and upper end cover of this utility model;

[0019] Figure 5 For the present utility model Figure 4 A magnified view of a portion of area A;

[0020] In the diagram: 1. Lower end cap; 2. Upper end cap; 3. Filter cartridge body; 4. Top opening retaining ring; 5. Through hole; 6. Support bar; 7. First connecting bolt; 8. Perforated support cylinder; 9. Folded filter screen; 10. Threaded connection groove; 11. First assembly hole; 12. Sealing ring; 13. Threaded hole; 14. Second connecting bolt; 15. Connecting ring; 16. Second assembly hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figure 1-5This utility model provides an embodiment of a stainless steel pleated filter element, comprising a lower end cover 1, an upper end cover 2, and a filter cartridge body 3. The filter cartridge body 3 is disposed between the lower end cover 1 and the upper end cover 2. Threaded connection grooves 10 are provided at the bottom of the lower end cover 1 and the top of the upper end cover 2. A connecting ring 15 is provided at both the upper and lower ends of the filter cartridge body 3, and the connecting ring 15 is fixedly connected to the filter cartridge body 3. The outer wall of the connecting ring 15 is provided with threads corresponding to the threaded connection grooves 10, and the connecting ring 15 is threadedly connected to the lower end cover 1 and the upper end cover 2. A through hole 5 is provided at the center of the upper end cover 2. Four support bars 6 are installed inside the filter cartridge body 3. Support bars 6 are equidistantly arranged inside the filter cartridge body 3. The lower end of the support bar 6 is fixedly connected to the lower end cover 1, and the support bar 6 is in contact with the inner wall of the filter cartridge body 3. The filter cartridge body 3 includes a porous support cylinder 8 and a folded filter screen 9. The folded filter screen 9 is arranged outside the porous support cylinder 8 and is in contact with the porous support cylinder 8. The upper end of the support bar 6 is provided with a threaded hole 13. The upper end cover 2 is provided with a second assembly hole 16. A second connecting bolt 14 is installed inside the second assembly hole 16, and the second connecting bolt 14 is slidably connected to the upper end cover 2. The second connecting bolt 14 is correspondingly arranged with the threaded hole 13, and the second connecting bolt 14 is threadedly connected to the support bar 6.

[0023] In use: Insert the support bar 6 into the filter cartridge body 3, align the connecting ring 15 at the lower end of the filter cartridge body 3 with the threaded connection groove 10 at the bottom of the lower end cover 1, rotate the filter cartridge body 3 so that its lower part is connected to the lower end cover 1, then align the connecting ring 15 at the upper end of the filter cartridge body 3 with the threaded connection groove 10 at the top of the upper end cover 2, rotate the upper end cover 2 so that it is connected to the upper part of the filter cartridge body 3, use the second connecting bolt 14 to pass through the second assembly hole 16 and insert it into the threaded hole 13 to connect with the support bar 6, straighten the support bar 6, and the support bar 6 contacts the inner wall of the filter cartridge body 3 to provide lateral support for the filter cartridge body 3.

[0024] Please see Figure 3 , Figure 4 and Figure 5Each of the two connecting rings 15 has a sealing ring 12 installed at one end, and the sealing ring 12 is fitted and connected to the connecting ring 15. The sealing ring 12 is located inside the threaded connecting groove 10 and fits against the lower end cover 1 and the upper end cover 2. A first mounting hole 11 is provided on one side of both the lower end cover 1 and the upper end cover 2, and the first mounting hole 11 communicates with the threaded connecting groove 10. A first connecting bolt 7 is installed inside the first mounting hole 11, and the first connecting bolt 7 is threadedly connected to the lower end cover 1 and the upper end cover 2. A top-end retaining ring 4 is installed on the upper end of the cover 2, and the top-end retaining ring 4 is integrated with the upper cover 2. The top-end retaining ring 4 is located outside the through hole 5. The first connecting bolt 7 passes through the first assembly hole 11 and makes one end contact with the connecting ring 15 to limit the connection of the connecting ring 15 and improve the connection between the connecting ring 15 and the lower cover 1 and the upper cover 2. The sealing ring 12 fills the connection gap between the connecting ring 15 and the lower cover 1 and the upper cover 2, and improves the sealing performance of the connection between the connecting ring 15 and the lower cover 1 and the upper cover 2.

[0025] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stainless steel pleated filter element, comprising a lower end cap (1), an upper end cap (2), and a filter cartridge body (3), characterized in that: The filter cartridge body (3) is located between the lower end cover (1) and the upper end cover (2). The bottom of the lower end cover (1) and the top of the upper end cover (2) are provided with threaded connection grooves (10). The upper and lower ends of the filter cartridge body (3) are provided with a connecting ring (15), and the connecting ring (15) is fixedly connected to the filter cartridge body (3). The outer wall of the connecting ring (15) is provided with a thread corresponding to the threaded connection groove (10), and the connecting ring (15) is threadedly connected to the lower end cover (1) and the upper end cover (2). The center of the upper end cover (2) is provided with a through hole (5). The filter cartridge body (3) is equipped with a support strip (6). There are four support strips (6), and the four support strips (6) are equidistantly arranged inside the filter cartridge body (3). The lower end of the support strip (6) is fixedly connected to the lower end cover (1), and the support strip (6) is in contact with the inner wall of the filter cartridge body (3).

2. The stainless steel pleated filter element according to claim 1, characterized in that: The filter cartridge body (3) includes a porous support cylinder (8) and a folded filter screen (9). The folded filter screen (9) is disposed outside the porous support cylinder (8) and is attached to the porous support cylinder (8).

3. A stainless steel pleated filter element according to claim 1, characterized in that: The upper end of the support bar (6) is provided with a threaded hole (13), and the upper end cover (2) is provided with a second assembly hole (16). The second assembly hole (16) is installed with a second connecting bolt (14), and the second connecting bolt (14) is slidably connected to the upper end cover (2). The second connecting bolt (14) is correspondingly provided with the threaded hole (13), and the second connecting bolt (14) is threadedly connected to the support bar (6).

4. A stainless steel pleated filter element according to claim 1, characterized in that: A sealing ring (12) is installed at one end of each of the two connecting rings (15), and the sealing ring (12) is in close contact with the connecting ring (15). The sealing ring (12) is located inside the threaded connecting groove (10), and the sealing ring (12) is in close contact with the lower end cover (1) and the upper end cover (2).

5. A stainless steel pleated filter element according to claim 1, characterized in that: The lower end cover (1) and the upper end cover (2) are each provided with a first assembly hole (11) on one side, and the first assembly hole (11) is connected to the threaded connection groove (10). A first connecting bolt (7) is installed inside the first assembly hole (11), and the first connecting bolt (7) is threadedly connected to the lower end cover (1) and the upper end cover (2).

6. A stainless steel pleated filter element according to claim 1, characterized in that: The upper end of the upper cover (2) is equipped with a top opening fixing ring (4), and the top opening fixing ring (4) and the upper end cover (2) are integrated. The top opening fixing ring (4) is located on the outside above the through hole (5).

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