Sealing structure and filtering equipment comprising same
Through the double-piece sealing structure and tight connection design, the problem of air leakage in traditional single-layer sealing is solved, and efficient air sealing is achieved, ensuring the complete isolation of the filter media.
Patent Information
- Application Number
- CN202323590105.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-27
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-27
AI Technical Summary
In high-demand application scenarios of traditional security filters, single-layer sealing may have problems such as lax sealing and easy air leakage, and cannot fully ensure the sealing effect of the filter media.
Adopting a double-piece sealing gasket structure, the first sealing gasket is adapted and fitted with the second sealing gasket, and through the embedding design of the first protrusion and the second protrusion, a tight connection is formed, combining the L-shaped and inverted L-shaped cross-sectional design. , ensure sealing, and a double-set sealing structure is provided on both sides of the housing to improve air-sealing.
The hourly leakage rate under -1000Pa pressure is achieved ≤0.25%, effectively preventing the penetration or spill of active ingredients and improving the air-sealing property of the filtering equipment.
Smart Images
Figure CN222324357U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biosafety, in particular to a sealing structure and a filtering device comprising the structure. Background Art
[0002] In the field of biosafety, there are a large number of exhaust filtration devices and their ancillary equipment, which are used to filter active ingredients in exhaust air to reduce biosafety risks. In such equipment, a differential pressure gauge (or differential pressure sensor) for monitoring the pressure difference or other reserved ports for detection and disinfection are generally installed. In order to further prevent the leakage of active ingredients during the operation of differential pressure gauge calibration, replacement, and opening of the reserved ports, a security filter is generally installed on the pressure gauge pressure pipe. Traditional security filters only use a simple single-layer sealing pad in the shell and high-efficiency glass fiber filter paper to achieve sealing and filtering effects, and there are the following problems:
[0003] (1) Traditional security filters usually use a simple single-layer sealing gasket. This design may not fully ensure the true sealing effect of the filter medium.
[0004] (2) In some high-demand application scenarios, single-layer gaskets may have problems such as poor sealing and easy leakage. Summary of the invention
[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sealing structure and a filtering device including the structure to solve one or more problems in the prior art.
[0006] To achieve the above purpose, the technical solution of the utility model is as follows:
[0007] A sealing structure comprises a first sealing gasket and a second sealing gasket, wherein the first sealing gasket is adapted to fit with the second sealing gasket, the first sealing gasket has a plurality of first protrusions, and the second sealing gasket has a plurality of second protrusions.
[0008] Furthermore, a plurality of grooves are formed between two adjacent first protrusions, and the second protrusion can be embedded in the grooves.
[0009] Furthermore, the cross section of the first sealing gasket is L-shaped, the cross section of the second sealing gasket is inverted L-shaped, and the effective height of the first sealing gasket is the same as the effective height of the second sealing gasket.
[0010] Furthermore, the outer diameter of the L-shaped transverse surface of the second sealing gasket is the same as that of the first sealing gasket, and the length of the transverse surface where the first protrusion is located is equal to the length of the transverse surface where the second protrusion is located.
[0011] Furthermore, a first liner is arranged in the first sealing gasket, and a second liner is arranged in the second sealing gasket. The first liner is L-shaped, and the second liner is I-shaped.
[0012] A filtering device including a sealing structure comprises a shell and a sealing structure arranged in the shell. The shell is formed by welding two groups of sub-shells and a main body, and the sealing structure is arranged on the main body.
[0013] Furthermore, each group of the sub-shells includes an air pipe joint and two flanges, the flanges are provided with mounting holes, the two groups of the sub-shells are fixedly connected via fasteners and the mounting holes, and the air pipe joint is arranged at one end of the main body.
[0014] Furthermore, the filtering device also includes a filtering medium, and the filtering medium is arranged between the first sealing gasket and the second sealing gasket.
[0015] Furthermore, the diameter of the filter medium is smaller than the inner diameter of the first sealing gasket.
[0016] Compared with the prior art, the beneficial technical effects of the utility model are as follows:
[0017] (i) The utility model provides a double-piece sealing gasket, installs the filter medium between the first sealing gasket and the second sealing gasket, and uses the first protrusion and the second protrusion to initially compress the filter medium. When subjected to external compression force, the purpose of completely isolating the upstream and downstream of the filter medium can be achieved, effectively preventing the active ingredients from penetrating the filter medium or overflowing from the fixed boundary of the filter medium.
[0018] (ii) Furthermore, by arranging the sealing structures on both sides of the shell, and each set of sealing structures is composed of a double-piece sealing gasket, the airtightness of the entire filtering device can meet the requirement of an hourly leakage rate of ≤0.25% under a pressure of -1000Pa.
[0019] (III) Furthermore, by providing a first protrusion on the first sealing gasket and a second protrusion on the second sealing gasket, the second protrusion can be embedded in the groove formed by the first protrusion, so as to achieve a tight connection of the sealing structure and ensure the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A structural schematic diagram of a sealing structure according to an embodiment of the utility model is shown.
[0021] Figure 2 A schematic diagram of the structural disassembly of a sealing structure according to an embodiment of the utility model is shown.
[0022] Figure 3 A structural schematic diagram of a filtering device including a sealing structure according to an embodiment of the utility model is shown.
[0023] Figure 4 A partial structural schematic diagram of a filtering device including a sealing structure according to an embodiment of the utility model is shown.
[0024] Markings in the accompanying drawings: 1. sealing structure; 100. first sealing gasket; 1000. first protrusion; 1001. first lining; 1002. groove; 101. second sealing gasket; 1010. second protrusion; 1011. second lining; 2. shell; 200. sub-shell; 2000. air pipe joint; 2001. flange; 201. main body; 3. filter medium; 4. mounting hole. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, the sealing structure proposed by the utility model and the filtering device containing the structure are further described in detail in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the implementation method of the utility model. In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the utility model can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the utility model.
[0026] The specific structure of a sealing structure is described below:
[0027] A sealing structure, please refer to Figure 1 The sealing structure 1 includes a first sealing gasket 100 and a second sealing gasket 101 . The first sealing gasket 100 fits with the second sealing gasket 101 . The first sealing gasket 100 has a plurality of first protrusions 1000 , and the second sealing gasket 101 has a plurality of second protrusions 1010 .
[0028] Furthermore, a plurality of grooves 1002 are formed between two adjacent first protrusions 1000 , and the second protrusions 1010 can be embedded in the grooves 1002 . Specifically, the number and shape of the grooves 1002 are the same as the number and shape of the second protrusions 1010 .
[0029] For further information, please refer to Figure 1 and Figure 2The first sealing gasket 100 has an L-shaped cross section, and the second sealing gasket 101 has an inverted L-shaped cross section. Specifically, the first protrusion 1000 is arranged on the L-shaped cross section of the first sealing gasket 100, and the second protrusion 1010 is arranged on the L-shaped cross section where the second sealing gasket 101 and the first sealing gasket 100 are connected. Please refer to Figure 2 , the effective height L1 of the first sealing gasket 100 is the same as the effective height l1 of the second sealing gasket 101, that is, L1=l1, wherein L1 specifically refers to the height of the inner height of the L-shaped vertical surface of the first sealing gasket 100 minus the height of the first protrusion 1000, and l1 is the inner height of the L-shaped vertical surface of the second sealing gasket 101. Specifically, in the present embodiment, the material of the first sealing gasket 100 and the second sealing gasket 101 is preferably silicone rubber. Of course, in other embodiments of the present invention, the material of the first sealing gasket 100 and the second sealing gasket 101 can also be fluororubber or EPDM rubber and other polymer materials with strong tolerance to common sterilizing agents such as VHP (vaporized hydrogen peroxide), ozone, and formaldehyde.
[0030] Further, the L-shaped cross-sectional outer diameters of the second sealing gasket 101 and the first sealing gasket 100 are the same, and the cross-sectional length of the first protrusion 1000 is equal to the cross-sectional length of the second protrusion 1010. Figure 2 , which can be specifically expressed as D1=d1, D2=d2, wherein D1 represents the outer diameter of the L-shaped transverse surface of the first sealing gasket 100, d1 represents the outer diameter of the L-shaped transverse surface of the second sealing gasket 101, D2 represents the length of the transverse surface where the first protrusion 1000 is located, and d2 represents the length of the transverse surface where the second protrusion 1010 is located.
[0031] Furthermore, a first lining 1001 is arranged in the first sealing gasket 100, and a second lining 1011 is arranged in the second sealing gasket 101. The first lining 1001 is L-shaped, and the second lining 1011 is I-shaped. Specifically, in the present embodiment, the first lining 1001 and the second lining 1011 are both metal liners for increasing the strength of the first sealing gasket 100 and the second sealing gasket 101. The metal material is preferably SUS 304 stainless steel, and the thickness is not less than 2 mm.
[0032] The specific structure of a filtering device including a sealing structure is described below:
[0033] Please refer to Figure 3 and Figure 4A filtering device including a sealing structure, the filtering device includes a shell 2 and a sealing structure 1 arranged in the shell 2, the shell 2 is welded by two groups of sub-shells 200 and a main body 201, the sealing structure 1 is arranged on the main body 201, specifically, the sealing structure 1 is outer-mounted on the main body 201, so that the airtightness of the entire filtering device can meet the requirement of an hourly leakage rate of ≤0.25% (in the protective equipment wire pipe standard) under a pressure of -1000Pa, and the shell 2 is made of SUS 304 or SUS 316 stainless steel.
[0034] Further, each group of the sub-shells 200 includes an air pipe joint 2000 and two flanges 2001, the flanges 2001 are respectively arranged on both sides of the main body 201, the flanges 2001 are provided with mounting holes 4, and the two groups of the sub-shells 200 are fixedly connected by fasteners and the mounting holes 4. Specifically, in this embodiment, the upper and lower flanges 2001 are connected by bolts and the mounting holes 4, so as to connect the two groups of sub-shells 200, and the air pipe joint 2000 is arranged at one end of the main body 201. Preferably, in this embodiment, during the welding process of the shell 2, the flange 2001 and the main body 201 are first stamped and formed, and then the air pipe joint 2000 is welded. Of course, in other embodiments of the utility model, the flange 2001, the main body 201 and the air pipe joint 2000 can also be formed by full welding. Further, the air pipe joint 2000 is one of the common joint forms such as a threaded joint, a flange joint, a quick-insert joint, and is preferably a threaded joint and a flange joint.
[0035] Furthermore, it is characterized in that: the filtering device also includes a filter medium 3, and the filter medium 3 is arranged between the first sealing gasket 100 and the second sealing gasket 101. Specifically, in the present embodiment, the filter medium 3 can be a glass fiber filter paper with an efficiency of H14 or above that meets the requirements of EN1822, or a polymer filter membrane with a pore size of ≤0.22um, such as a PTFE filter membrane, a PVDF filter membrane, a PES filter membrane, etc. Further, by setting a double-piece sealing gasket, the filter medium 3 is installed between the first sealing gasket 100 and the second sealing gasket 101, and the first protrusion 1000 and the second protrusion 1010 are used to preliminarily compress the filter medium 3. When subjected to external compression force, the purpose of completely isolating the upstream and downstream of the filter medium 3 can be achieved, and the active ingredients can be effectively prevented from penetrating the filter medium 3 or overflowing from the fixed boundary of the filter medium 3.
[0036] Furthermore, the diameter of the filter medium 3 is smaller than the inner diameter of the first sealing gasket 100. Figure 3, R represents the inner diameter of the first sealing gasket 100, so as to ensure that the filter medium can be placed without wrinkles and then pressed by the first sealing gasket 100 and the second sealing gasket 101. Specifically, during the installation of the filter medium 3, the filter medium 3 is first placed on the L-shaped cross section of the first sealing gasket 100, and then covered with the second sealing gasket 101, so that the first sealing gasket 100, the second sealing gasket 101 and the filter medium 3 form an integral structure.
[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A sealing structure, characterized in that: The sealing structure (1) comprises a first sealing gasket (100) and a second sealing gasket (101); the first sealing gasket (100) and the second sealing gasket (101) are adapted to fit each other; the first sealing gasket (100) has a plurality of first protrusions (1000) and the second sealing gasket (101) has a plurality of second protrusions (1010); the cross section of the first sealing gasket (100) is L-shaped, and the cross section of the second sealing gasket (101) is inverted L-shaped; the effective height of the first sealing gasket (100) is the same as the effective height of the second sealing gasket (101); the outer diameter of the L-shaped cross section of the second sealing gasket (101) and the first sealing gasket (100) is the same, and the length of the cross section where the first protrusion (1000) is located is equal to the length of the cross section where the second protrusion (1010) is located.
2. A sealing structure according to claim 1, characterized in that: A plurality of grooves (1002) are formed between two adjacent first protrusions (1000), and the second protrusions (1010) can be embedded in the grooves (1002).
3. A sealing structure according to claim 1, characterized in that: A first liner (1001) is disposed inside the first sealing gasket (100), and a second liner (1011) is disposed inside the second sealing gasket (101); the first liner (1001) is L-shaped, and the second liner (1011) is I-shaped.
4. A filtering device comprising a sealing structure, characterized in that: The filtering device comprises a shell (2) and a sealing structure (1) as claimed in any one of claims 1 to 3 arranged in the shell (2), wherein the shell (2) is composed of two groups of sub-shells (200) and a main body (201) welded together, and the sealing structure (1) is arranged on the main body (201).
5. A filtering device comprising a sealing structure as claimed in claim 4, characterized in that: Each group of sub-shells (200) comprises an air pipe joint (2000) and two flanges (2001); the flanges (2001) are provided with mounting holes (4); the two groups of sub-shells (200) are fixedly connected via fasteners and the mounting holes (4); and the air pipe joint (2000) is arranged at one end of the main body (201).
6. A filtering device comprising a sealing structure as claimed in claim 5, characterized in that: The filtering device further comprises a filtering medium (3), wherein the filtering medium (3) is arranged between the first sealing gasket (100) and the second sealing gasket (101).
7. A filtering device comprising a sealing structure as claimed in claim 6, characterized in that: The diameter of the filter medium (3) is smaller than the inner diameter of the first sealing gasket (100).