A filter cartridge with a limiting structure

Abstract

This invention provides a filter cartridge with a limiting structure, including an end cap, a base, and filter media. The top of the base has a limiting protrusion ring for limiting the filter media, and spaced teeth are provided on the inner wall of the limiting protrusion ring. A snap-fit ​​element is provided below the opening of the end cap, and the snap-fit ​​element cooperates with the limiting protrusion ring to limit the axial displacement of the filter cartridge body. A limiting spring is provided on the filter media to buffer vibration and enhance the stability of the filter cartridge body. This invention significantly improves the structural stability of the filter cartridge under vibration conditions while maintaining excellent filtration performance, solving the technical problems of easy displacement and sealing failure in traditional filter cartridges. It has comprehensive advantages such as convenient assembly, reliable positioning, and strong vibration resistance.

Description

Technical Field

[0001] This utility model relates to a filter cartridge with a limiting structure. Background Technology

[0002] In industrial production, environmental protection equipment, and air purification, filter cartridges are a common filtration element widely used in dust collection and gas filtration. Traditional filter cartridges typically consist of filter media, a support frame, and end caps, using the filter medium to intercept particulate matter and achieve gas-solid separation. However, existing filter cartridges lack effective limiting structures during installation, making them prone to misalignment or rotation, leading to poor sealing, affecting filtration efficiency, and even causing equipment leaks. Utility Model Content

[0003] This invention provides a filter cartridge with a limiting structure, which can effectively solve the above problems.

[0004] This utility model is implemented as follows: A filter cartridge with a limiting structure includes an end cap, a base, and filter media. The top of the base is provided with a limiting protrusion ring for limiting the filter media. Spaced retaining teeth are provided on the inner wall of the limiting protrusion ring. A retaining member is provided below the opening of the end cap. The retaining member cooperates with the limiting protrusion ring to limit the axial displacement of the filter cartridge body. A limiting spring is provided on the filter media. The limiting spring is used to buffer vibration and enhance the stability of the filter cartridge body.

[0005] The beneficial effects of this utility model are: This invention achieves precise radial and circumferential positioning of the filter media through the engagement of a limiting protrusion ring on the top of the base and spaced teeth on the inner wall. Simultaneously, a snap-fit ​​component below the end cap forms an axial locking structure with the limiting protrusion ring. These three elements work together to construct a three-dimensional limiting system. A limiting spring on the filter media effectively absorbs vibration energy during equipment operation through its elastic deformation characteristics, forming a stable system with the aforementioned rigid limiting structure through rigid-flexible coupling. This integrated design significantly improves the structural stability of the filter cartridge under vibration conditions while maintaining excellent filtration performance. It solves the technical problems of easy displacement and sealing failure in traditional filter cartridges, offering comprehensive advantages such as convenient assembly, reliable positioning, and strong vibration resistance. Attached Figure Description

[0006] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0007] Figure 1 This is the front view of this utility model.

[0008] Figure 2 This is the first exploded view of this utility model.

[0009] Figure 3 This is the second exploded view of this utility model.

[0010] Figure 4 This is a cross-sectional view of the base of this utility model.

[0011] Explanation of icon numbers: 10. End caps; 20. Base; 200. Limiting protrusion ring; 202. Spacer teeth; 30. Filter media; 40. Limiting spring; 50. Elastic band; 60. External protrusion; 70. Screw hole; 80. Reinforcing rib; 90. Snap-fit ​​component; 110. Inner filter screen. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0013] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0014] Reference Figure 1-4As shown, a filter cartridge with a limiting structure includes an end cap 10, a base 20, and a filter media 30. The top of the base 20 is provided with a limiting protrusion ring 200 for limiting the filter media 30. The limiting protrusion ring 200 has spaced retaining teeth 202 on its inner wall. A retaining member 90 is provided below the opening of the end cap 10. The retaining member 90 cooperates with the limiting protrusion ring 200 to limit the axial displacement of the filter cartridge body. A limiting spring 40 is provided on the filter media 30. The limiting spring 40 is used to buffer vibration and enhance the stability of the filter cartridge body. An inner filter screen 110 is provided inside the filter media 30. Outer protrusions 60 are provided at intervals on the outer and inner circumferences of the end cap 10.

[0015] Furthermore, the limiting spring 40 in this case can also adopt a segmented spiral structure, with a tightly wound section at the top for rigid support and a loosely wound section at the bottom for elastic buffering. At the same time, the end of the spring is provided with a radially expanding positioning claw, which can be embedded in the gap between the filter pages for multi-point fixation. In this way, the preload of the spring can maintain uniform contact pressure between adjacent filter pages. The wavy spacer set between the filter pages engages with the spring winding gap, and the outer diameter of the spring forms an interference fit with the inner hole of the filter material 30 to prevent radial movement.

[0016] The top of the base 20 is provided with reinforcing ribs 80, which are evenly distributed along the circumference of the base 20 to improve the structural strength.

[0017] The end cap 10 is provided with a screw hole 70 for connecting with the reinforcing rib 80.

[0018] The spacer teeth 202 match the filter media 30 to ensure accurate positioning of the filter media 30 during installation.

[0019] The filter media 30 is also equipped with an elastic band 50, which is made of high-temperature resistant rubber or silicone material to adapt to different working conditions.

[0020] The limiting protrusion 200 has a trapezoidal cross-section to improve the guiding and stability of the limiting structure. The limiting protrusion 200 has an inclination angle A, 30°≤A≤60°. Preferably, the inclination angle A is approximately 52°. This design has the advantage of forming a 5°-8° misalignment angle with the corrugated inclination angle of the outer wall of the filter material 30, creating a gradual contact pressure distribution and improving the uniformity of pressure on the filter material 30. Furthermore, the misalignment angle forms a spiral flow channel, increasing the airflow velocity. In one embodiment, if A < 30°, the guiding effect weakens and the disassembly resistance increases; if A > 60°, the radial limiting effect decreases, and the displacement under vibration conditions increases.

[0021] Working principle: When this filter cartridge is working, the filter medium enters the cartridge from the outside and is first filtered and separated by the filter media 30. When the dust-laden gas flows through the filter media 30, the dust particles are trapped on the outer surface of the filter media 30. The purified gas passes through the inner filter screen 110 and enters the internal channel of the filter cartridge before being discharged. During this process, the limiting protrusion 200 and the spacer teeth 202 on the base 20 are tightly engaged with the filter media 30 to prevent the filter media 30 from shifting under the impact of airflow. The snap-fit ​​part 90 of the end cover 10 engages with the limiting protrusion 200 to restrict axial movement. The external protrusion 60 ensures a secure connection between the filter cartridge and external equipment. Meanwhile, the limiting spring 40 continuously absorbs the vibration energy generated by the operation of the equipment, the elastic band 50 provides a stable preload to compensate for possible loosening, and the reinforcing rib 80 enhances the overall structural rigidity to resist airflow pressure. These limiting and anti-vibration structures work together to ensure both filtration efficiency and the operational stability of the filter cartridge under complex conditions such as vibration or high-pressure airflow. The trapezoidal cross-section limiting protrusion 200 and the convenient screw hole 70 connection design make the installation and maintenance of the filter cartridge more convenient and reliable.

[0022] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A filter cartridge with a limiting structure, comprising an end cap (10), a base (20), and filter media (30), characterized in that, The base (20) is provided with a limiting protrusion ring (200) for limiting the filter material (30) at the top. The limiting protrusion ring (200) has spaced teeth (202) on its inner wall. The end cap (10) is provided with a snap-fit ​​member (90) below its opening. The snap-fit ​​member (90) cooperates with the limiting protrusion ring (200) to limit the axial displacement of the filter cartridge. The filter material (30) is provided with a limiting spring (40) for buffering vibration and enhancing the stability of the filter cartridge.

2. A filter cartridge with a limiting structure according to claim 1, characterized in that, The base (20) is provided with a reinforcing rib (80) at the top, and the reinforcing rib (80) is evenly distributed along the circumference of the base (20) to improve the structural strength.

3. A filter cartridge with a limiting structure according to claim 2, characterized in that, The end cap (10) is provided with a screw hole (70) for connecting with the reinforcing rib (80).

4. A filter cartridge with a limiting structure according to claim 1, characterized in that, The spacer teeth (202) match the filter media (30) to ensure accurate positioning of the filter media (30) during installation.

5. A filter cartridge with a limiting structure according to claim 1, characterized in that, The filter material (30) is also provided with an elastic band (50), which is made of high temperature resistant rubber or silicone material to adapt to different working conditions.

6. A filter cartridge with a limiting structure according to claim 1, characterized in that, The cross-section of the limiting protrusion (200) is trapezoidal to improve the guidance and stability of the limiting structure.

7. A filter cartridge with a limiting structure according to claim 1, characterized in that, The filter material (30) is provided with an internal filter screen (110).

8. A filter cartridge with a limiting structure according to claim 1, characterized in that, The outer and inner circumferences of the end cap (10) are respectively provided with external protrusions (60).

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