Sealing structure and filter

Abstract

According to the sealing structure, an independent sealing ring is adopted, axial pressure is applied to the sealing ring through an upper cover, the sealing ring is promoted to be attached to the upper cover in the axial direction to form a first sealing face and a third sealing face, and meanwhile the sealing ring is attached to the bottom of a sealing groove of a lower cover in the axial direction to form a second sealing face. And the connecting piece and the filtering unit of the filter are sealed through the first sealing surface, the second sealing surface and the third sealing surface. The sealing structure disclosed by the utility model is simple in structure, low in cost and convenient to install, and the filter disclosed by the utility model is good in sealing effect and has higher practical value.

Description

Technical Field

[0001] This utility model belongs to the field of biopharmaceutical process technology, specifically relating to a sealing structure and filter. Background Technology

[0002] Filters are widely used in biopharmaceutical processes. Depending on the application, filters come in different types, among which circular membrane stack filters have a wide range of applications. A membrane stack filter includes connectors and filter units. The filter units are fixed to the connectors and filter harmful impurities from the feed liquid. Specifically, the feed liquid enters the membrane stack filter under external pressure, is filtered by the filter units, and is then discharged. Because membrane stack filters operate in a high-pressure environment with bidirectional fluid flow, sealing is a key factor affecting filtration efficiency. Therefore, ensuring the filter's sealing is a crucial issue in the manufacturing of membrane stack filters.

[0003] In existing technologies, sealing rings or sealing structures are typically used to ensure the sealing performance of filters. Common sealing rings or sealing structures include the following three types:

[0004] (1) Axial sealing structure

[0005] See Figure 1 Sufficient interference is reserved between the sealing ring and its axial end face. By fully compressing the sealing ring in the axial direction, an effective sealing surface is formed, thereby forming an effective axial sealing structure.

[0006] (2) Radial sealing structure

[0007] See Figure 2 Sufficient interference is reserved between the sealing ring and its radial end face. By fully compressing the sealing ring radially, an effective sealing surface is formed, thereby forming an effective radial sealing structure.

[0008] (3) Main body axial sealing, double-sided radial self-sealing structure

[0009] Referring to Chinese patent CN215137607U (sealing ring and filter), the double-sided design of the sealing structure is a Y-shaped structure. When subjected to internal and external pressure, it opens outward and squeezes the radial sealing surface to form a secondary self-sealing surface. The bottom protrusion design, through the interference with the axial end face, applies extrusion pressure during assembly, and fully axially squeezes the sealing ring to form an effective sealing surface, thus forming the main sealing surface.

[0010] The existing technology has the following problems:

[0011] (1) The axial sealing structure and radial sealing structure do not form a self-sealing structure, and the sealing effect is limited.

[0012] (2) Although the sealing structure with self-sealing structure improves the sealing effect, on the one hand, it is a double-sided sealing structure, but in actual working conditions, most of the pressure is on one side, and the double-sided structure is redundant; on the other hand, in order to facilitate assembly, the sealing structure is not an independent sealing ring, but needs to be attached to the main structure, and the manufacturing process is complicated. Summary of the Invention

[0013] To overcome the shortcomings of existing technologies, one objective of this utility model is to provide a sealing structure, and another objective is to provide a filter. To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0014] One aspect of this utility model provides a sealing structure, including an upper cover, a sealing ring, and a lower cover. The outer side of the sealing ring includes an annular groove. The upper cover applies axial pressure to the sealing ring, causing the annular groove to deform. The sealing ring and the upper cover are axially fitted to form a first sealing surface, and the sealing ring and the lower cover are fitted to form a second sealing surface.

[0015] Optionally, the sealing ring is made of a flexible material. When the upper cover applies axial pressure to the sealing ring, the sealing ring deforms, causing the annular groove to deform as well.

[0016] Optionally, the upper cover and the lower cover are disposed opposite to each other. The lower cover includes a sealing groove for accommodating the sealing ring. The upper cover applies axial pressure to the sealing ring, causing the annular groove to deform. The sealing ring and the bottom of the sealing groove are axially fitted to form the second sealing surface.

[0017] Optionally, the upper cover includes a sealing rib facing the sealing ring, through which axial pressure is applied to the sealing ring, and the sealing ring and the sealing rib form the first sealing surface.

[0018] Optionally, the annular groove is a V-shaped structure with its opening facing outward from the sealing ring. The upper part of the V-shaped structure is inclined towards the upper cover. When the upper cover applies axial pressure to the sealing ring, the upper part deforms, changing from an inclined state to a horizontal state, and fits against the upper cover to form a third sealing surface. The lower part of the V-shaped structure fits axially with the bottom of the sealing groove to form a second sealing surface.

[0019] Optionally, the axial height of the sealing ring is higher than the axial height of the sealing groove. When the upper cover applies pressure to the sealing ring, the sealing ring deforms axially and forms the second sealing surface with the lower cover.

[0020] Optionally, the sealing ring and the sealing groove are radially interference-fitted to form a fourth sealing surface.

[0021] Optionally, the upper cover and the lower cover are made of rigid materials.

[0022] Another aspect of this utility model provides a filter, including a connector, a filter unit, and a sealing structure as described above for sealing the connector and the filter unit.

[0023] The sealing structure of this invention employs an independent sealing ring. Axial pressure is applied to the sealing ring by the upper cover, causing it to axially adhere to the upper cover, forming a first and third sealing surface. Simultaneously, it axially adheres to the bottom of the sealing groove on the lower cover, forming a second sealing surface. The first, second, and third sealing surfaces seal the filter connectors and filter unit. This sealing structure is simple, low-cost, and easy to install. The filter produced by this invention has excellent sealing performance and high practical value. Attached Figure Description

[0024] After reading the detailed embodiments of this utility model with reference to the accompanying drawings, the reader will gain a clearer understanding of all aspects of this utility model. Among them,

[0025] Figure 1 Schematic diagram of the existing sealing structure-1;

[0026] Figure 2 Schematic diagram of the existing sealing structure - 2;

[0027] Figure 3 This is a perspective view of a sealing ring according to an embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional view of a sealing ring according to an embodiment of the present invention;

[0029] Figure 5 This is a perspective view of the top cover according to an embodiment of the present utility model;

[0030] Figure 6 This is a cross-sectional view of the top cover according to an embodiment of the present invention;

[0031] Figure 7 This is a perspective view of the lower cover according to an embodiment of the present utility model;

[0032] Figure 8 This is a cross-sectional view of the lower cover according to an embodiment of the present invention;

[0033] Figure 9 This is an assembly diagram of the sealing structure (not installed) according to one embodiment of the present invention;

[0034] Figure 10 This is an assembly drawing (installation drawing) of the sealing structure according to one embodiment of the present invention;

[0035] Figure 11 This is a side view of a filter according to an embodiment of the present invention;

[0036] Figure 12 This is a front view of a filter according to an embodiment of the present invention;

[0037] Figure 13 This is a cross-sectional view of a filter according to an embodiment of the present invention;

[0038] Explanation of reference numerals in the attached figures:

[0039] 1: Sealed structure; 2: Connecting parts; 3: Filter unit;

[0040] 11: Top cover; 12: Sealing ring; 13: Bottom cover; 14: First sealing surface; 15: Second sealing surface; 16: Third sealing surface; 17: Fourth sealing surface;

[0041] 111: Sealing rib; 121: Annular groove; 131: Sealing groove;

[0042] 1211: Upper part of the V-shaped structure; 1212: Lower part of the V-shaped structure. Detailed Implementation

[0043] To make the technical content disclosed in this application more detailed and complete, reference can be made to the accompanying drawings and the following specific embodiments of this utility model. However, those skilled in the art should understand that the embodiments provided below are not intended to limit the scope of this utility model. Furthermore, the drawings are for illustrative purposes only and are not drawn to their original dimensions.

[0044] The term "connection" in this specification includes both direct and indirect connections. The terms "several" and "more than" refer to two or more entities. The terms "first," "second," and "third" in the specification, claims, and accompanying drawings also apply.

[0045] The use of terms such as "fourth" (if present) is to distinguish similar objects and is not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] The technical solution of this utility model will be described in detail below. The following embodiments can be combined with each other. The same or similar concepts or processes may not be described again in some embodiments.

[0047] Example 1:

[0048] This embodiment provides a sealing structure 1 for sealing the connector 2 and filter unit 3 of a membrane stack filter. Please refer to [link to relevant documentation]. Figure 3-10 The sealing structure 1 includes an upper cover 11, a sealing ring 12, and a lower cover 13. The upper cover 11 and the lower cover 13 are disposed opposite to each other, and the sealing ring 12 is accommodated in the lower cover 13. The upper cover 11 applies axial pressure to the sealing ring 12, and the sealing ring 12 fits against the upper cover 11 and the lower cover 13 respectively, sealing the connector 2 and the filter unit 3.

[0049] In this embodiment, the upper cover 11 and the lower cover 13 are made of rigid materials, and the sealing ring 12 is made of flexible materials. Therefore, when the upper cover 11 applies axial pressure to the sealing ring 12, the sealing ring 12 deforms and fits tightly with the upper cover 11 and the lower cover 13.

[0050] In this embodiment, the upper cover 11 includes a sealing rib 111 facing the sealing ring 12, and the sealing rib 111 is annular; the outer side of the sealing ring 12 includes an annular groove 121, and the annular groove 121 is a V-shaped structure with its opening facing the outer side of the sealing ring 12, and the upper part 1211 of the V-shaped structure is inclined towards the upper cover 11; the lower cover 13 includes a sealing groove 131; specifically, the sealing groove 131 is used to accommodate the sealing ring 12, and specifically, the lower part 1212 of the V-shaped structure is accommodated in the sealing groove 131.

[0051] In this embodiment, the upper cover 11 applies axial pressure to the sealing ring 12. Specifically, the sealing rib 111 applies axial pressure to the sealing ring 12. Specifically, the sealing rib 111 causes the sealing ring 12 to deform. The sealing ring 12 and the sealing rib 111 are axially fitted to form a first sealing surface 14. The lower part 1212 of the V-shaped structure is axially fitted to the bottom of the sealing groove 131 to form a second sealing surface 15. The upper part 1211 of the V-shaped structure deforms from an inclined state to a horizontal state and fits with the upper cover 11 to form a third sealing surface 16.

[0052] In this embodiment, the axial height of the sealing ring 12 is higher than the axial height of the sealing groove 131. When the upper cover 11 applies pressure to the sealing ring 12, the sealing ring 12 deforms axially, forming the second sealing surface 15 with the lower cover 13. The sealing ring 12 and the sealing groove 131 are radially interference-fitted, forming the fourth sealing surface 17. The sealing structure 1 seals the connector 2 and the filter unit 3 through the first sealing surface 14, the second sealing surface 15, the third sealing surface 16, and the fourth sealing surface 17.

[0053] Example 2:

[0054] This embodiment provides a filter; please refer to [link / reference]. Figure 11-13 The filter includes a connector 2, a filter unit 3, and a sealing structure 1, which seals the connector 2 and the filter unit 3. Specifically, the connector 2 is arranged along the central axis of the filter unit 3, the filter unit 3 is sleeved on the connector 2, and the sealing structure 1 is located at the connection between the connector 2 and the filter unit 3 to seal the connection.

[0055] In this embodiment, the sealing structure 1 includes an upper cover 11, a sealing ring 12, and a lower cover 13. The upper cover 11 and the lower cover 13 are disposed opposite to each other, and the sealing ring 12 is accommodated in the lower cover 13. The upper cover 11 applies axial pressure to the sealing ring 12, and the sealing ring 12 fits against the upper cover 11 and the lower cover 13 respectively, sealing the connector 2 and the filter unit 3.

[0056] In this embodiment, the upper cover 11 is sleeved on the connector 2. When the upper cover 11 applies axial pressure to the sealing ring 12, the upper cover 11 and the sealing ring 12 form a seal. At the same time, the sealing ring 12 also forms a seal with the lower cover 13. At this time, the upper cover 11 is fixed, and the sealing structure 1 is fixed at the connection between the connector 2 and the filter unit 3, thereby forming a seal.

[0057] In this embodiment, the lower cover 13 and the filter unit 3 are designed as an integral part. In other embodiments of this utility model, the lower cover 13 can also be set independently.

[0058] Example 3:

[0059] This embodiment describes the assembly process of the sealing structure to further illustrate the technical solution of this utility model. The assembly process steps are as follows:

[0060] (1) The sealing structure 1 is fitted onto the connector 2.

[0061] (2) Place the sealing ring 12 in the sealing groove 131 of the lower cover 13.

[0062] (3) The upper cover 11 applies axial pressure to the sealing ring 12, causing the sealing ring 12 to deform and form a first sealing surface 14 and a third sealing surface 16 with the upper cover 11, and a second sealing surface 15 and a fourth sealing surface 17 with the lower cover 13, which together seal the connector 2 and the filter unit 3.

[0063] The sealing structure of this invention employs an independent sealing ring. Axial pressure is applied to the sealing ring by the upper cover, causing it to axially adhere to the upper cover, forming a first and third sealing surface. Simultaneously, it axially adheres to the bottom of the sealing groove on the lower cover, forming a second sealing surface. The first, second, and third sealing surfaces seal the filter connectors and filter unit. This sealing structure is simple, low-cost, and easy to install. The filter produced by this invention has excellent sealing performance and high practical value.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. The embodiments listed in this utility model cannot exhaustively describe all implementation methods. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model. All documents mentioned in this utility model are incorporated herein by reference as if they were individually incorporated by reference.

Claims

1. A sealing structure, characterized in that, The sealing structure includes an upper cover, a sealing ring, and a lower cover. The outer side of the sealing ring includes an annular groove. The upper cover applies axial pressure to the sealing ring, causing the annular groove to deform. The sealing ring and the upper cover are axially fitted to form a first sealing surface, and the sealing ring and the lower cover are fitted to form a second sealing surface.

2. The sealing structure according to claim 1, characterized in that, The sealing ring is made of a flexible material. When the upper cover applies axial pressure to the sealing ring, the sealing ring deforms, which in turn causes the annular groove to deform.

3. The sealing structure according to claim 2, characterized in that, The upper cover and the lower cover are disposed opposite to each other. The lower cover includes a sealing groove for accommodating the sealing ring. The upper cover applies axial pressure to the sealing ring, causing the annular groove to deform. The sealing ring and the bottom of the sealing groove are axially fitted to form the second sealing surface.

4. The sealing structure according to claim 3, characterized in that, The upper cover includes a sealing rib facing the sealing ring, and axial pressure is applied to the sealing ring through the sealing rib. The sealing ring and the sealing rib form the first sealing surface.

5. The sealing structure according to claim 4, characterized in that, The annular groove is a V-shaped structure with its opening facing the outside of the sealing ring. The upper part of the V-shaped structure is inclined towards the upper cover. When the upper cover applies axial pressure to the sealing ring, the upper part deforms, changing from an inclined state to a horizontal state, and fits against the upper cover to form a third sealing surface. The lower part of the V-shaped structure fits axially against the bottom of the sealing groove to form a second sealing surface.

6. The sealing structure according to claim 5, characterized in that, The axial height of the sealing ring is higher than the axial height of the sealing groove. When the upper cover applies pressure to the sealing ring, the sealing ring deforms axially and forms the second sealing surface with the lower cover.

7. The sealing structure according to claim 6, characterized in that, The sealing ring and the sealing groove are radially interference-fitted to form a fourth sealing surface.

8. The sealing structure according to claim 7, characterized in that, The upper cover and the lower cover are made of rigid materials.

9. A filter, comprising a connector and a filter unit, characterized in that, Includes a sealing structure as described in any one of claims 1 to 8, for sealing the connector and the filter unit.

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