Large-flow multilayer folding filter element

Abstract

The utility model relates to the technical field of environmental protection and treatment, in particular to a high-flow multilayer folding filter element. Comprising a filter material layer which is used for filtering liquid or gas flowing through the filter element, and the filter material layer is in a multi-layer folded shape; the outer protective shell surrounds and supports the filter material layer so as to maintain the shape and the stability of the filter material layer; the internal central pipe is arranged in the filter material layer and is used for providing a water flow channel and enhancing the overall strength of the filter element; the sealing rings are arranged at the two ends of the external protective shell so as to realize reliable sealing between the filter element and the shell or the interface, and the sealing rings are made of materials with excellent temperature resistance and can keep a good sealing effect at an extreme temperature; the pressing rings are arranged in the two ends of the external protection shell and used for fixing and pressing the sealing rings, and the sealing stability is ensured. The hold-down ring is fixed through threaded connection or buckle connection with the external protective shell.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection and governance technology, and specifically relates to a high-flow-rate multi-layer pleated filter element. Background Technology

[0002] High-flow-rate multi-layer pleated filter cartridges are high-efficiency filtration devices widely used in the purification of various liquids and gases. Their multi-layer pleated design significantly increases the effective filtration area, thereby improving filtration efficiency and flow rate. However, a significant problem exists in the use of these multi-layer pleated filter cartridges: the external seals degrade under extreme temperature changes, leading to poor sealing and media leakage. This not only affects filtration performance but may also cause equipment malfunction or environmental pollution.

[0003] A search revealed that in the prior art, Chinese Patent Publication No. CN216395387U, published on April 29, 2022, discloses a high-flow-rate multi-layer pleated filter element, including an upper end cover and a lower end cover. Multiple pleated filter elements are arranged between the upper and lower end covers, nested sequentially from the inside out, with the same inner diameter. The contact points of the inner diameters of the multiple pleated filter elements are fixedly connected. The pleats of the pleated filter elements increase in size from the inside out, and the pore size decreases in size from the inside out. A supporting outer shell and a supporting inner shell are also fixed between the upper and lower end covers. The supporting outer shell is located on the outside of the multiple pleated filter elements, and the supporting inner shell is located on the inside of the multiple pleated filter elements. A water inlet pipe is fixed on the lower end cover, and a positioning groove is provided on the water inlet pipe, with a sealing ring installed in the positioning groove. This utility model adopts a folding design, which provides a larger usable area. The filtrate is filtered layer by layer. Compared with traditional composite filter screens, it has high throughput and good support capacity. In addition, the multi-layer folded filter element stacking design reduces the size of the outer shell.

[0004] However, this device still has the following drawbacks: the external seals degrade under extreme temperature changes, leading to poor sealing and media leakage. This not only affects the filtration effect but may also cause equipment failure or environmental pollution. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a high-flow-rate, multi-layered, pleated filter element. It includes a filter media layer, which is multi-layered and pleated; it filters liquids or gases flowing through the filter element.

[0006] An outer protective shell surrounds and supports the filter media layer to maintain its shape and stability.

[0007] An internal central tube, located inside the filter media layer, is used to provide a water flow channel and enhance the overall strength of the filter element;

[0008] A sealing ring is provided at both ends of the outer protective shell to achieve a reliable seal between the filter element and the shell or interface. The sealing ring is made of a material with excellent temperature resistance and can maintain a good sealing effect under extreme temperatures.

[0009] A clamping ring, located inside both ends of the outer protective shell, is used to fix and clamp the sealing ring to ensure the stability of the seal. The clamping ring is fixed by threaded connection or snap-fit ​​connection with the outer protective shell. The sealing ring is clamped by the clamping ring and fits tightly against the end face of the outer protective shell to prevent poor sealing and media leakage caused by temperature changes.

[0010] Furthermore, the filter material layer is a multi-layer composite structure, and the contact surfaces between each layer are bonded with a high-strength adhesive to ensure stable interlayer bonding force under high and low temperature environments, and to prevent interlayer delamination caused by material performance degradation.

[0011] Furthermore, the outer protective shell is provided with reinforcing ribs at both ends, which are evenly distributed on the inner wall of the outer protective shell to increase its structural strength and reduce deformation when the temperature changes, thereby ensuring the reliability of the sealing ring.

[0012] Furthermore, the outer surface of the internal central tube is provided with spiral protrusions, which can increase the contact area with the filter material layer and improve the overall structural stability and temperature resistance.

[0013] Furthermore, the sealing ring adopts a multi-layer composite material structure, with an outer layer of high-temperature resistant material, an inner layer of low-temperature resistant material, and a middle layer of elastic material, to ensure good sealing performance even under extreme temperatures.

[0014] Furthermore, the middle layer of the sealing ring is also embedded with a metal mesh, which can provide support when the temperature changes, prevent the sealing ring from deforming, and ensure the sealing performance.

[0015] Furthermore, the outer layer of the sealing ring is provided with several micropores, which are used to release tiny air bubbles generated by temperature changes and prevent sealing failure caused by air bubble accumulation.

[0016] Furthermore, the clamping ring is a multi-segment design, consisting of a front clamping section and a rear clamping section, which are connected by a hinge. This allows the clamping ring to adjust the clamping force as needed, better adapting to the sealing requirements of temperature changes.

[0017] The beneficial effects of this utility model are:

[0018] 1. In practical applications, pin holes can be provided at corresponding positions in the front and rear clamping sections. The pins are passed through these holes, and the two ends of the buffer spring are connected to the pins. This connection method not only ensures that the buffer spring can freely expand and contract when subjected to changes in fluid pressure, but also makes the entire filter element structure more stable and reliable.

[0019] 2. This design ensures that the sealing ring maintains a stable compression state regardless of whether the operating environment is high or low pressure, effectively preventing liquid leakage. Specifically, when the fluid pressure increases, the buffer spring is compressed, thereby increasing the clamping force of the sealing ring; conversely, when the fluid pressure decreases, the buffer spring extends, reducing the pressure on the sealing ring, but always maintaining sufficient clamping force to ensure sealing performance.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the filter element according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of the filter element according to an embodiment of the present invention is shown;

[0024] Figure 3 A schematic diagram of the compression ring according to an embodiment of the present invention is shown;

[0025] Figure 4 A front cross-sectional view of a filter element according to an embodiment of the present invention is shown;

[0026] Figure 5 A schematic diagram of the structure of the sealing ring according to an embodiment of the present invention is shown;

[0027] Figure 6 A schematic diagram of the structure of a high-strength adhesive according to an embodiment of the present invention is shown;

[0028] Figure 7A schematic diagram of the structure of the sealing ring according to an embodiment of the present invention is shown;

[0029] Figure 8 A schematic diagram of the structure of a buffer spring according to an embodiment of the present invention is shown.

[0030] In the diagram: 1. Filter media layer; 2. Outer protective shell; 3. Inner central tube; 4. Sealing ring; 5. Compression ring; 6. High-strength adhesive; 7. Reinforcing rib; 8. Spiral protrusion; 9. Metal wire mesh; 10. Micropores; 11. Front compression section; 12. Rear compression section; 13. Hinge; 14. Buffer spring; 15. Pin; 16. Anti-slip teeth; 17. Guide channel. Detailed Implementation

[0031] 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 embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] This utility model embodiment provides a high-flow-rate multi-layer pleated filter element, exemplarily, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the filter element includes a filter media layer 1, an outer protective shell 2, an inner central tube 3, sealing rings 4, and compression rings 5. The filter media layer 1 is used to filter liquids or gases flowing through the filter element. The filter media layer 1 is multi-layered and folded. An outer protective shell 2 surrounds and supports the filter media layer 1, and an inner central tube 3 is provided inside the filter media layer 1. The inner central tube 3 provides a water flow channel and enhances the overall strength of the filter element. Sealing rings 4 are provided at both ends of the outer protective shell 2. The sealing rings 4 are made of a material with excellent temperature resistance, maintaining a good sealing effect under extreme temperatures. Simultaneously, a set of compression rings 5 ​​is provided inside each end of the outer protective shell 2. The compression rings 5 ​​are used to fix and compress the sealing rings 4, ensuring the stability of the seal. The compression rings 5 ​​are fixed by threaded connection or snap-fit ​​connection with the outer protective shell 2. The sealing rings 4 are pressed tightly by the compression rings 5 ​​and fit tightly against the end face of the outer protective shell 2.

[0033] The filter material layer 1 is a multi-layer composite structure. The contact surfaces between each layer are bonded with a high-strength adhesive 6 to ensure stable interlayer bonding force under high and low temperature environments and prevent interlayer delamination caused by material performance degradation.

[0034] The outer protective shell 2 has reinforcing ribs 7 at both ends. These reinforcing ribs 7 are evenly distributed on the inner wall of the outer protective shell 2 to increase its structural strength and reduce deformation when the temperature changes, thereby ensuring the reliability of the sealing ring 4.

[0035] The outer surface of the internal central tube 3 is provided with spiral protrusions 8, which can increase the contact area with the filter material layer 1 and improve the overall structural stability and temperature resistance.

[0036] The sealing ring 4 adopts a multi-layer composite material structure, with an outer layer of high-temperature resistant material, an inner layer of low-temperature resistant material, and a middle layer of elastic material to ensure good sealing performance even under extreme temperatures.

[0037] The middle layer of the sealing ring 4 is also embedded with a metal mesh 9, which can provide support when the temperature changes, prevent the sealing ring 4 from deforming, and ensure the sealing performance. The outer layer of the sealing ring 4 is also provided with a number of micropores 10, which are used to release tiny air bubbles generated by temperature changes, preventing the sealing failure caused by the accumulation of air bubbles.

[0038] The clamping ring 5 is a multi-segment design, consisting of a front clamping segment 11 and a rear clamping segment 12, which are connected by a hinge 13. This allows the clamping ring 5 to adjust the clamping force as needed, better adapting to the sealing requirements of temperature changes.

[0039] A buffer spring 14 is provided between the front clamping section 11 and the rear clamping section 12. The buffer spring 14 can automatically adjust the clamping force of the clamping ring 5 to ensure the sealing reliability at different temperatures.

[0040] The two ends of the buffer spring 14 are connected to the front pressing section 11 and the rear pressing section 12 respectively via pins 15 to ensure a rapid response when pressure changes and to keep the sealing ring 4 tight.

[0041] The outer protective shell 2 is also provided with anti-slip teeth 16 at both ends. These anti-slip teeth 16 can increase the friction with the compression ring 5 and prevent the compression ring 5 from loosening due to thermal expansion and contraction at extreme temperatures, thereby improving the sealing stability.

[0042] Multiple flow guide grooves 17 are provided between the outer protective shell 2 and the inner central tube 3. These flow guide grooves 17 are used to guide the fluid to be evenly distributed on the filter material layer 1, reduce the degradation of filter material performance caused by local temperature differences, and improve the overall service life of the filter element.

[0043] Working principle

[0044] When this device is in use, the operation of the high-flow-rate, multi-layered pleated filter cartridge is the result of the coordinated operation of multiple components. First, liquid or gas enters the filter cartridge through the internal central tube 3. This central tube not only serves as the main channel for water flow but also enhances the structural strength of the entire filter cartridge. As the liquid or gas flows from the central tube to the multi-layered pleated filter media layer 1, it undergoes fine filtration through each layer. The multi-layered pleated design of the filter media layer 1 significantly increases the filtration area, thereby improving the filter cartridge's filtration efficiency and flow handling capacity. Furthermore, the outer protective shell 2 protects and supports the filter media layer 1, ensuring that it maintains a stable structure and shape under high pressure or high flow rates, preventing deformation or collapse.

[0045] At both ends of the filter element, the sealing ring 4, in conjunction with the clamping ring 5, achieves a reliable seal with the equipment housing or interface. The sealing ring 4 is made of a material with excellent temperature resistance, maintaining its elasticity and sealing performance in extreme environments such as high or low temperatures. The clamping ring 5 is fixed to the outer protective shell 2 via a threaded or snap-fit ​​connection, tightly pressing the sealing ring 4 against the end face of the outer protective shell 2 to prevent poor sealing and media leakage caused by temperature differences. Therefore, whether in normal temperature environments or under extreme conditions, this tight connection between the sealing ring 4 and the clamping ring 5 ensures the stability and reliability of the entire filter element's operation, thus providing users with an efficient and safe filtration solution.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-flow-rate multi-layer pleated filter element, comprising a filter media layer (1), characterized in that: The filter material layer (1) is multi-layered and folded; Filtering liquids or gases flowing through the filter element; An outer protective shell (2) surrounds and supports the filter material layer (1) to maintain the shape and stability of the filter material layer (1); An internal central tube (3) is located inside the filter media layer (1) to provide a water flow channel and enhance the overall strength of the filter element; A sealing ring (4) is provided at both ends of the outer protective shell (2) to achieve a reliable seal between the filter element and the shell or interface. The sealing ring (4) is made of a material with excellent temperature resistance and can maintain a good sealing effect under extreme temperatures. A clamping ring (5) is located inside both ends of the outer protective shell (2) to fix and clamp the sealing ring (4) to ensure the stability of the seal. The clamping ring (5) is fixed by threaded connection or snap-fit ​​connection with the outer protective shell (2). The sealing ring (4) is clamped by the clamping ring (5) and tightly fits the end face of the outer protective shell (2) to prevent poor sealing and media leakage caused by temperature changes.

2. The high-flow-rate multi-layer pleated filter element according to claim 1, characterized in that: The filter material layer (1) is a multi-layer composite structure. The contact surfaces between each layer are bonded with a high-strength adhesive (6) to ensure stable interlayer bonding force under high and low temperature environments and prevent interlayer peeling caused by material performance degradation.

3. The high-flow-rate multi-layer pleated filter element according to claim 1, characterized in that: The outer protective shell (2) is provided with reinforcing ribs (7) at both ends. The reinforcing ribs (7) are evenly distributed on the inner wall of the outer protective shell (2) to increase its structural strength and reduce deformation when the temperature changes, thereby ensuring the reliability of the sealing ring (4).

4. The high-flow-rate multi-layer pleated filter element according to claim 1, characterized in that: The outer surface of the internal central tube (3) is provided with spiral protrusions (8), which can increase the contact area with the filter material layer (1) and improve the overall structural stability and temperature resistance.

5. The high-flow-rate multi-layer pleated filter element according to claim 1, characterized in that: The sealing ring (4) adopts a multi-layer composite material structure, with the outer layer being a high-temperature resistant material, the inner layer being a low-temperature resistant material, and the middle layer being an elastic material, to ensure that it still has a good sealing effect under extreme temperatures.

6. The high-flow-rate multi-layer pleated filter element according to claim 4, characterized in that: The middle layer of the sealing ring (4) is also embedded with a metal wire mesh (9), which can play a supporting role when the temperature changes, prevent the sealing ring (4) from deforming, and ensure the sealing performance.

7. The high-flow-rate multi-layer pleated filter element according to claim 5, characterized in that: The outer layer of the sealing ring (4) is also provided with a number of micropores (10). These micropores (10) are used to release tiny bubbles generated by temperature changes and prevent the sealing failure caused by bubble accumulation.

8. The high-flow-rate multi-layer pleated filter element according to claim 1, characterized in that: The clamping ring (5) is a multi-segment design, consisting of a front clamping segment (11) and a rear clamping segment (12), which are connected by a hinge (13). This allows the clamping ring (5) to adjust the clamping force as needed, better adapting to the sealing requirements of temperature changes.

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