Filter seal structure

Abstract

The application discloses a filter sealing structure, which comprises a mounting frame and a sealing piece. The inner side of the mounting frame is formed with a flange extending inward in the circumferential direction. The sealing piece is annular, and the outer side of the sealing piece is formed with a clamping groove extending inward in the circumferential direction. The flange is embedded in the clamping groove, so that the sealing piece is mounted on the inner side of the mounting frame. The mechanical embedding relationship between the flange and the clamping groove replaces the conventional fixing structure which needs to be designed separately, changes the mounting and fixing logic of the sealing piece, reduces the assembly steps, significantly shortens the equipment assembly time, and guarantees the consistency of the sealing effect.

Description

Technical Field

[0001] This application relates to the technical field of sealing structures, and more particularly to a filter sealing structure. Background Technology

[0002] In the field of filter equipment, especially in filter products involving dual-screen structures, sealing performance is one of the key indicators for ensuring filtration efficiency and equipment stability. Currently, the industry-standard technical solution for sealing dual-screen filters is a dual-seal strip sealing method. This involves configuring a separate sealing strip for each filter screen and then installing the two sealing strips onto the sealing contact surfaces of the filter screens respectively to achieve independent sealing of the dual filters. However, this traditional sealing structure has several unavoidable technical drawbacks in practical applications: First, during installation, the need to separately position, fit, and fix the two sealing strips significantly increases the number of installation steps compared to an integrated sealing structure. This not only prolongs equipment assembly time and increases manufacturing costs but also increases the operational complexity for installers, making installation deviations more likely due to the cumbersome process. Second, due to the independent installation characteristics of the two sealing strips, their sealing effect is easily affected by factors such as installation force, fitting accuracy, and the uniformity of the sealing strip material itself, making it difficult to guarantee the sealing performance of both sealing strips. The sealing compression and contact tightness are completely consistent, which leads to inconsistent sealing effects. During long-term use, areas with poor sealing effects are prone to media leakage, which seriously affects the filtration performance and service life of the filter. In addition, in order to reliably fix the two sealing strips, it is necessary to design corresponding fixing grooves, buckles or clamping structures for each sealing strip's structural dimensions and installation position. This makes the filter's sealing cavity structure design more complex, which not only increases the difficulty of mold development and parts processing, but also occupies more internal space in the equipment, which is not conducive to the development of filter equipment towards miniaturization and compactness. Utility Model Content

[0003] The purpose of this application is to provide a filter sealing structure that can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution: On one hand, a filter sealing structure is provided, including: a mounting frame and a sealing element, wherein the inner circumferential side of the mounting frame extends inward to form a folded edge, the sealing element is annular, and the outer circumferential side of the sealing element has a groove, the folded edge is fitted into the groove, so that the sealing element is installed on the inner side of the mounting frame.

[0005] Furthermore, the sealing element includes an intermediate body and sealing bodies located on the upper and lower sides of the intermediate body, and the slot is formed in the intermediate body.

[0006] Furthermore, the cross-section of the intermediate is U-shaped.

[0007] Furthermore, the intermediate body is provided with a reinforcing member inside.

[0008] Furthermore, the structural strength of the reinforcing member is greater than that of the sealing member.

[0009] Furthermore, the sealing element is made of EPDM foam, and the reinforcing element is made of steel.

[0010] Furthermore, the thickness of the intermediate body is 6-9 mm, the thickness of the sealing body is 3-6 mm, and the thickness of the reinforcing member is 0.2-0.4 mm.

[0011] Furthermore, the intermediate body and the two sealing bodies are integrally molded parts.

[0012] Furthermore, the depth of the slot is 20-24mm.

[0013] Furthermore, it also includes two filter elements, one of which abuts against the lower surface of the seal and the other of which abuts against the upper surface of the seal.

[0014] The beneficial effects of this application are as follows: The circumferentially extended flange on the inner side of the mounting frame forms a precise fitting structure with the circumferentially opened groove on the outer side of the annular seal. Simply aligning the groove of the seal with the flange of the mounting frame and completing the fitting allows for a one-time, secure installation of the seal inside the mounting frame. This structure, through the mechanical fitting relationship between the flange and the groove, replaces the traditional separately designed fixing structure, changes the installation and fixing logic of the seal, reduces assembly steps, significantly shortens equipment assembly time, reduces manufacturing costs, and, due to the simplified operation process, avoids positioning deviations caused by multiple operations, improving the accuracy of seal installation and reducing the impact of human error on the sealing effect. Simultaneously, it ensures the consistency of the sealing effect, avoids media leakage caused by local seal failure, significantly improves the filtration efficiency of the filter, and extends the overall service life of the equipment. Attached Figure Description

[0015] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is an assembly drawing of the mounting frame and seal described in the embodiments of this application; Figure 2 This is a schematic diagram of the sealing element described in the embodiments of this application; Figure 3 This is a cross-sectional view of the seal described in the embodiments of this application; Figure 4 This is a schematic diagram of the mounting frame described in an embodiment of this application; Figure 5 This is a schematic diagram of the filter sealing structure described in the embodiments of this application; Figure 6 This is an exploded view of the filter sealing structure described in the embodiments of this application.

[0017] In the diagram: 1. Mounting frame; 101. Folded edge; 2. Seal; 201. Slot; 202. Intermediate body; 203. Sealing body; 204. Reinforcing member; 3. Filter element. Detailed Implementation

[0018] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1-6As shown, this embodiment provides a filter sealing structure, including: a mounting frame 1 and a sealing member 2. The inner circumferential side of the mounting frame 1 extends inward to form a folded edge 101. The sealing member 2 is annular, and the outer circumferential side of the sealing member 2 is provided with a groove 201. The folded edge 101 is fitted into the groove 201 so that the sealing member 2 is installed on the inner side of the mounting frame 1.

[0022] The filter sealing structure provided in this application achieves integrated sealing through the interlocking design of the folded edge 101 of the mounting frame 1 and the groove 201 of the seal 2. Its core fitting logic is as follows: the folded edge 101 extending circumferentially on the inner side of the mounting frame 1 forms a precise fitting structure with the groove 201 circumferentially opened on the outer side of the annular seal 2. Simply aligning the groove 201 of the seal 2 with the folded edge 101 of the mounting frame 1 and completing the interlocking process allows for a secure installation of the seal 2 inside the mounting frame 1 in one step. This design fundamentally changes the installation and fixing logic of the seal 2, transforming the traditional independent installation of dual sealing strips into an integrated assembly of the seal 2. Furthermore, the mechanical interlocking relationship between the folded edge 101 and the groove 201 replaces the traditional separately designed fixing structure, thereby addressing multiple technical problems and bringing significant advantages. At the installation level, addressing the issues of multiple installation steps and potential installation deviations associated with traditional double sealing strips, this structure features an integrated design for the single-ring seal 2. This simplifies the original two-stage positioning and fixing process into a single-stage fitting, directly reducing assembly steps, significantly shortening equipment assembly time, and lowering manufacturing costs. Furthermore, the simplified operation process avoids positioning deviations caused by multiple operations, improving the installation accuracy of the seal 2 and reducing the impact of human error on the sealing effect. In terms of sealing performance, this structure addresses the shortcomings of inconsistent sealing performance and easy media leakage caused by traditional dual sealing strips. Because the annular sealing element 2 of this structure is an integrated molding structure, its material uniformity and cross-sectional dimension consistency are far superior to two independent sealing strips. Furthermore, the interlocking installation of the folded edge 101 and the groove 201 ensures that the sealing element 2 is subjected to uniform circumferential force, making the contact tightness and compression of the sealing element 2 with the filter screen and the mounting frame 1 consistent. This completely solves the problem of the difference in sealing performance between the two sealing strips in the traditional structure, effectively avoids media leakage caused by local sealing failure, significantly improves the filtration efficiency of the filter, and extends the overall service life of the equipment.

[0023] At the structural design level, addressing the issue that traditional structures require separate fixing structures for the dual sealing strips, resulting in complex cavities and large space occupation, this structure directly achieves stable fixing of the sealing element 2 through the interlocking relationship of the folded edge 101 and the slot 201. This eliminates the need for additional fixing grooves, clips, or clamping components, significantly simplifying the structural complexity of the mounting frame 1 and the sealing cavity, and reducing the difficulty of mold development and component processing. Simultaneously, the integrated sealing element 2 and integrated fixing structure design reduce the space occupied by the sealing system within the equipment, providing key structural support for the miniaturization and compactness of filter equipment, and broadening the product's application scenarios, such as for space-constrained vehicle filters and small household filtration devices.

[0024] Furthermore, the sealing element 2 includes an intermediate body 202 and sealing bodies 203 located on the upper and lower sides of the intermediate body 202, with the slot 201 formed in the intermediate body 202. The intermediate body 202 serves as the core support and connecting carrier of the sealing element 2. The slot 201 on its outer circumferential side precisely engages with the folded edge 101 on the inner side of the mounting frame 1, achieving stable positioning of the sealing element 2 on the mounting frame 1 through the mechanical engagement between the intermediate body 202 and the folded edge 101. The upper and lower sealing bodies 203 serve as direct sealing units, forming a tight fit with the corresponding end faces of the dual filters after the sealing element 2 is installed. The elastic deformation of the sealing body 203 fills the gaps in the contact surfaces, thereby achieving synchronous sealing of the dual filters. This functional partition design, where the intermediate body 202 is responsible for fixing and the upper and lower sealing bodies 203 are responsible for sealing, allows for a precise match between the fixing reliability and sealing effectiveness of the sealing element 2.

[0025] Furthermore, the intermediate body 202 has a U-shaped cross-section, and a reinforcing member 204 is provided inside the intermediate body 202. The U-shaped cross-section makes the intermediate body 202 form a frame structure with a certain elastic deformation space. When the slot 201 on the outside of the intermediate body 202 is fitted with the folded edge 101 of the mounting frame 1, the two side walls of the U-shaped structure can adapt to the dimensional deviation of the folded edge 101 through slight elastic deformation, ensuring a smoother fitting process and enhancing the tightness of the fit after fitting. The built-in reinforcing member 204 is distributed along the inner contour of the U-shaped structure, providing rigid support for the intermediate body 202 without compromising the elastic adaptability of the U-shaped structure, offsetting the external forces generated during the fitting process and when the filter is used, and preventing the fitting of the slot 201 and the folded edge 101 from loosening due to deformation of the intermediate body 202 under stress. This combination design not only preserves the compatibility of the intermediate body 202 with the folded edge 101, but also strengthens the structural load-bearing capacity of the intermediate body 202, laying the foundation for the overall fixation stability and long-term reliability of the seal 2.

[0026] The structural strength of the reinforcing member 204 is greater than that of the sealing member 2. The sealing member 2, as a whole, not only needs to ensure the elastic deformation capability of the sealing body 203 to achieve a tight seal, but also needs to consider the basic support capability of the intermediate body 202. Therefore, it is usually made of elastic polymer material with relatively low structural strength. The reinforcing member 204, as the core rigid support unit, is made of a higher-strength material. After being embedded inside the intermediate body 202, it provides stable mechanical support to the intermediate body 202 due to its higher structural strength. When the intermediate body 202 is subjected to external forces, the reinforcing member 204 can resist stresses exceeding the bearing capacity of the sealing member 2, preventing irreversible deformation of the intermediate body 202. At the same time, it does not affect the normal elastic deformation of the sealing body 203 caused by sealing requirements, achieving rigid support without interfering with elastic sealing, and elastic sealing without weakening the synergistic effect of rigid support.

[0027] Because the strength of the reinforcing member 204 is higher than that of the sealing member 2, it can significantly improve the deformation resistance of the intermediate body 202 without changing the overall elastic characteristics of the sealing member 2. Compared with the design where the strength of the reinforcing member 204 and the sealing member 2 are the same, this solution can increase the ultimate load that the intermediate body 202 can withstand, effectively resisting the continuous stress caused by medium pressure fluctuations and equipment vibration during long-term use of the filter, avoiding irreversible structural failures such as cracking and collapse of the intermediate body 202, and further ensuring the fitting stability of the sealing member 2 and the folded edge 101 of the mounting frame 1, fundamentally eliminating the risk of seal displacement due to insufficient strength of the intermediate body 202. Moreover, if a high-strength material is used to improve the overall strength of the sealing member 2, it will not only increase the material cost, but also sacrifice the sealing performance of the sealing body 203; while this structural strength combination can achieve a precise match between material cost and performance: high-strength materials are used only in key parts that need support, while low-cost elastic materials are used in other parts, reducing the overall material cost while ensuring structural strength and sealing effect. Furthermore, this design does not require changes to the molding process of seal 2 and can be achieved through existing methods such as insert injection molding and nested assembly, thus possessing good adaptability to industrial production. Specifically, the sealing element 2 is made of EPDM foam, and the reinforcing element 204 is made of steel. EPDM foam possesses excellent elasticity, weather resistance, and sealing properties. As the main body of the sealing element 2 (including the intermediate body 202 and the upper and lower sealing bodies 203), it can achieve a reliable seal by relying on its own elastic deformation to ensure a tight fit between the upper and lower sealing bodies 203 and the double filter screen. Furthermore, the slight deformation of the intermediate body 202 can accommodate the dimensional deviations of the mounting frame 1's folded edge 101, ensuring smooth fitting. Steel, on the other hand, has extremely high structural strength and rigidity. After the reinforcing element 204 is embedded inside the intermediate body 202, it can resist external impacts and long-term stress through its own rigidity, preventing deformation or cracking of the intermediate body 202 due to insufficient rigidity of the EPDM foam, while not affecting the elastic sealing function of the sealing body 203.

[0028] It is worth noting that the thickness of the intermediate body 202 is 6-9mm, the thickness of the sealing body 203 is 3-6mm, the thickness of the reinforcing member 204 is 0.2-0.4mm, and the depth of the slot 201 is 20-24mm. The intermediate body 202 serves as the core support and connection. Its thickness of 6-9mm provides ample space for the slot 201 and a stable mounting base for the upper and lower sealing bodies 203. The sealing body 203 thickness of 3-6mm ensures its elastic deformation capability while avoiding sealing failure due to excessive thinness or material waste due to excessive thickness, ensuring sufficient deformation to achieve sealing when in contact with the dual filter screen. The reinforcing member 204 thickness of 0.2-0.4mm provides sufficient rigid support to prevent deformation of the intermediate body 202 while avoiding an increase in the overall volume of the intermediate body 202 due to excessive thickness, which would affect its compatibility with the mounting frame 1, and also reduces the amount of material used for the reinforcing member 204. The depth of the slot 201 of 20-24mm is compatible with the conventional size of the folded edge 101 of the mounting frame 1, ensuring that the folded edge 101 can be deeply embedded in the slot 201, improving the stability of the sealing member 2 after installation and preventing it from falling off during use.

[0029] Preferably, the intermediate body 202 and the two sealing bodies 203 are integrally molded. Through injection molding, compression molding, or other integrated molding processes, the intermediate body 202 and the upper and lower sealing bodies 203 are formed in one piece, creating a seamless overall structure. During assembly, the integrated structure can directly engage with the folded edge 101 of the mounting frame 1 via the slot 201 of the intermediate body 202, eliminating the need for separate positioning and assembly of the intermediate body 202 and the sealing bodies 203. Simultaneously, the integral molding ensures no gaps between the intermediate body 202 and the sealing bodies 203. When the sealing body 203 is bonded to the double filter screen to achieve a seal, the supporting force of the intermediate body 202 can be directly and evenly transferred to the sealing body 203, avoiding uneven force transmission caused by separate connections and further ensuring the stability of the sealing effect.

[0030] Generally, it also includes two filter elements 3, one of which abuts against the lower surface of the seal 2, and the other abuts against the upper surface of the seal 2. The sealing bodies 203 on the upper and lower sides of the seal 2 have elastic deformation characteristics. When the two filter elements 3 abut against the corresponding sealing bodies 203, the assembly pressure of the filter elements 3 will cause the sealing bodies 203 to undergo adaptive deformation. On the one hand, the deformation of the sealing bodies 203 can accurately fill the tiny gaps on the surface of the filter elements 3, forming a tight fit without gaps, blocking the leakage of the medium to be filtered from the contact surface between the two from the source; on the other hand, the pressure generated by the abutment can form a stable constraint on the filter elements 3, preventing the filter elements 3 from shifting or deviating during the impact of medium flow and equipment vibration, ensuring that the medium to be filtered must flow completely through the filtration channels of the two filter elements 3. At the same time, the seal 2 is fixed to the mounting frame 1 through the interlocking of the intermediate body 202, providing a unified and stable support reference for the two filter elements 3.

[0031] Compared to the traditional method where two sealing strips are separately fitted to the filter element 3, which is prone to misalignment, this solution directly abuts the two filter elements 3 against the upper and lower sealing bodies 203 of the sealing element 2. The elastic deformation of the sealing body 203 achieves a tight point-to-point fit. The sealing body 203 not only prevents leakage of the medium from the gap in the mounting frame 1 through its own fit, but also prevents short-circuit flow of the medium from the edge of the filter element 3 through its contact with the filter element 3. Especially for easily leaking media such as high-viscosity liquids and high-pressure gases, this solution completely avoids direct penetration of unfiltered media, significantly improving filtration accuracy and equipment reliability.

[0032] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0035] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A filter sealing structure, characterized in that, include: The mounting frame (1) and the sealing element (2) are provided. The inner circumferential side of the mounting frame (1) extends inward to form a folded edge (101). The sealing element (2) is annular and has a slot (201) on its outer circumferential side. The folded edge (101) is fitted into the slot (201) so that the sealing element (2) is installed on the inner side of the mounting frame (1).

2. The filter sealing structure according to claim 1, characterized in that, The sealing element (2) includes an intermediate body (202) and sealing bodies (203) located on the upper and lower sides of the intermediate body (202), and the slot (201) is formed in the intermediate body (202).

3. The filter sealing structure according to claim 2, characterized in that, The intermediate (202) has a U-shaped cross-section.

4. The filter sealing structure according to claim 3, characterized in that, The intermediate body (202) has a reinforcing member (204) inside.

5. The filter sealing structure according to claim 4, characterized in that, The structural strength of the reinforcing member (204) is greater than that of the sealing member (2).

6. The filter sealing structure according to claim 5, characterized in that, The sealing element (2) is made of EPDM foam, and the reinforcing element (204) is made of steel.

7. The filter sealing structure according to claim 5, characterized in that, The thickness of the intermediate body (202) is 6-9 mm, the thickness of the sealing body (203) is 3-6 mm, and the thickness of the reinforcing member (204) is 0.2-0.4 mm.

8. The filter sealing structure according to claim 2, characterized in that, The intermediate body (202) and the two sealing bodies (203) are integrally formed.

9. The filter sealing structure according to any one of claims 1-8, characterized in that, The depth of the slot (201) is 20-24mm.

10. The filter sealing structure according to any one of claims 1-8, characterized in that, It also includes two filter elements (3), one of which abuts against the lower surface of the seal (2) and the other of which abuts against the upper surface of the seal (2).

Images