A quick-change hole area airtightness test sealing ring installation structure

Abstract

This utility model relates to the technical field of airtightness testing equipment and discloses a quick-change sealing ring installation structure for orifice airtightness testing, including a sealing ring, a mounting frame, and an air passage. One end of the sealing ring has a snap fastener on its inner side, and the other end has a supporting surface inside. The mounting frame has a groove or protrusion that matches the snap fastener and is connected to the sealing ring via a quick-release mechanism. The air passage is located radially on the mounting frame, and its diameter is smaller than the diameter of the test product's orifice. The sealing ring is detachably connected to the mounting frame via the snap fastener. This utility model enables quick and convenient installation and replacement of the sealing ring, improving the efficiency and accuracy of airtightness testing, while also possessing good versatility, adapting to orifices of various sizes and shapes.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing equipment, specifically a quick-change hole area airtightness testing sealing ring installation structure. Background Technology

[0002] In industrial production, airtightness testing of various components with orifices is a crucial step in ensuring product quality. Airtightness testing detects leaks in components, ensuring their performance and safety in actual use. As a key component in achieving a seal during airtightness testing, the design of the sealing ring's installation structure directly affects the accuracy and efficiency of the test, as well as the ring's lifespan.

[0003] Early sealing ring installation structures for orifice area airtightness testing were relatively simple, typically employing direct embedding or simple fixing methods. This structure was extremely inconvenient for installing and removing the sealing ring, requiring significant time and manpower. For example, in airtightness testing of small components, due to the small size of the sealing ring, operators had to carefully place it in the designated position using delicate tools; slight carelessness could lead to damage or improper installation, affecting test results. Furthermore, the disassembly process was equally cumbersome when replacing the sealing ring, severely impacting production efficiency. With technological advancements, improved installation structures emerged, such as threaded or snap-fit ​​connections for fixing the sealing ring. While these structures improved the ease of installation and disassembly to some extent, some drawbacks remained. For instance, threaded connections were prone to loosening after prolonged use, leading to a decrease in the sealing performance of the sealing ring and affecting the accuracy of the airtightness test; while snap-fit ​​connections could suffer from wear or deformation of the snaps, resulting in an insecure seal, similarly affecting test results. Furthermore, these structures are less flexible in adapting to hole areas of different sizes and shapes, often requiring the design of specialized mounting structures for different components, which increases production costs and design complexity. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a quick-change sealing ring installation structure for orifice airtightness testing. This structure enables quick and convenient installation and replacement of the sealing ring, improving the efficiency and accuracy of airtightness testing. It also has good versatility, adapting to orifices of various sizes and shapes. This solves the problems of inconvenient installation and disassembly, unstable sealing performance, and poor versatility of existing orifice airtightness testing sealing ring installation structures.

[0005] To achieve the goal of enabling quick and convenient installation and replacement of sealing rings, improving the efficiency and accuracy of airtightness testing, and having good versatility to adapt to various hole areas of different sizes and shapes, this utility model provides the following technical solution: a quick-change hole area airtightness testing sealing ring installation structure, including a sealing ring, wherein a buckle is provided on the inner side of one end of the sealing ring, and a support surface is provided inside the other end of the sealing ring;

[0006] The mounting frame is provided with a groove or protrusion that matches the buckle, and is connected to the sealing ring by a quick-release method;

[0007] The air vent is located radially on the mounting frame, and its diameter is smaller than that of the test product.

[0008] The sealing ring is detachably connected to the mounting frame via a snap fastener.

[0009] Preferably, the sealing ring has an air passage hole in the middle that corresponds to the air passage hole.

[0010] Preferably, the buckle is either an internal buckle or an external buckle.

[0011] Preferably, the sealing ring is fitted outside the mounting frame, and the actual contact area between the sealing ring and the mounting frame is smaller than the corresponding contact surface area of ​​the mounting frame.

[0012] Preferably, the outer side of the sealing ring is provided with rounded corners.

[0013] Preferably, the connection between the sealing ring and the mounting frame is chamfered.

[0014] Preferably, the sealing ring is made of PU plastic.

[0015] Preferably, the mounting frame includes a base and mounting posts disposed at the edge of the base.

[0016] Preferably, the base has mounting holes.

[0017] Preferably, the mounting frame is made of aluminum alloy and has an anodized layer on its surface.

[0018] Compared with the prior art, this utility model provides a quick-change sealing ring installation structure for orifice area airtightness testing, which has the following advantages:

[0019] 1. The quick-change hole area airtightness test sealing ring installation structure allows for easy replacement of the sealing ring. Simply remove the worn sealing ring by hand and press the new sealing ring into place to complete the replacement process. This significantly reduces equipment downtime caused by replacing sealing ring consumables.

[0020] 2. The quick-change hole area airtightness test sealing ring installation structure is equipped with a buckle to install the sealing ring to prevent it from falling off and to allow for quick replacement; a support surface is provided to support the sealing ring in contact with the top of the product to prevent sealing deformation and maintain the sealing effect. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is a side view of the overall structure of Embodiment 1 of this utility model;

[0023] Figure 3 This is a schematic diagram of the sealing ring structure in Embodiment 1 of this utility model;

[0024] Figure 4 This utility model Figure 3 A sectional view of the structure;

[0025] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0026] Figure 6 This is a schematic diagram of the sealing ring structure in Embodiment 2 of this utility model;

[0027] Figure 7 This is a side view of the overall structure of Embodiment 1 of this utility model;

[0028] Figure 8 This utility model Figure 7 A sectional view of the structure.

[0029] In the diagram: 1. Mounting frame; 11. Base; 12. Mounting column; 13. Mounting hole; 14. Vent hole; 15. Protrusion; 16. Groove; 2. Sealing ring; 21. Vent hole; 22. Sealing surface; 23. Supporting surface; 24. Chamfer; 25. Rounded corner; 26. Buckle. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0031] like Figure 1 , Figure 2 and Figure 4As shown, a quick-change hole area airtightness test sealing ring installation structure includes a sealing ring 2, a buckle 26 is provided on the inner side of one end of the sealing ring 2, and a support surface 23 is provided inside the other end of the sealing ring 2.

[0032] The mounting frame 1 is provided with a protrusion 15 that matches the buckle 26 and is connected to the sealing ring 2 via a quick-release mechanism;

[0033] The air vent 14 is located radially on the mounting frame 1, and its diameter is smaller than that of the test product.

[0034] The sealing ring 2 is detachably connected to the mounting frame 1 via the snap fastener 26. The support surface 23 ensures that the sealing ring 2 is in close contact with the product sealing surface. The sealing ring 2 is made of PU plastic with a Shore hardness of 85A. Utilizing its high elasticity (elastic modulus of 12MPa), it generates 15-20% elastic deformation under pressure, filling the tiny gap (≤0.1mm) between the product hole area and the sealing surface 22, forming a line contact seal. The support surface 23 provides reverse support force when the sealing ring 2 is under pressure, preventing the sealing ring 2 from being squeezed into the product hole area. The mounting frame 1 is made of PA66 + 30% glass fiber reinforced material, which can withstand the test gas pressure (0.6MPa) without deformation. Its annular groove 16 is 3mm deep, forming a stable mechanical interlock with the elastic claw. The diameter of the vent 14 is 3mm smaller than the product hole diameter, ensuring that the test gas forms a laminar flow and shortening the pressure equalization time to within 8 seconds. By controlling the cross-sectional area of ​​the vent 14 (2-5 mm smaller than the product vent diameter), a stable pressure field (0.4-0.6 MPa) is established in the sealed cavity for the test gas, thereby increasing the leak detection sensitivity to 0.1 sccm.

[0035] like Figure 4 As shown, a vent hole 21 corresponding to the vent hole 14 is provided in the middle of the sealing ring 2. The vent hole 21 passes through the surface of the sealing ring 2 and can be inflated. The vent hole 21 is located in the middle of the sealing ring 2 and is coaxially corresponding to the vent hole 14 of the mounting frame 1, forming a gas flow channel. The diameter of the vent hole is 0.5-1mm larger than that of the vent hole 14 to ensure no interference during assembly and to prevent the sealing ring 2 from deforming and blocking the gas passage. After the test gas enters through the vent hole 14 of the mounting frame 1, it directly reaches the sealing cavity through the vent hole 21, forming a gas flow channel. The structure forms a triple gas flow path: "skeleton-sealing ring 2-product". The through-hole cross-section is designed to reduce gas flow resistance, allowing the pressure inside the sealing cavity to reach the test value (0.6MPa) within 2 seconds, which is 40% faster than the traditional structure. When the sealing ring 2 is deformed under pressure, the edge of the through-hole 21 forms a line contact seal with the product sealing surface, preventing gas leakage from the edge of the through-hole. The axial gap between the through-hole and the through-hole 14 is controlled within 0.2mm to ensure uniform distribution of test gas and avoid excessive local pressure that could lead to seal failure.

[0036] like Figure 4As shown, the buckle 26 is an internal snap-fit ​​type; the internal snap-fit ​​buckle 26 forms a 0.3mm interference fit with the annular groove 16 of the mounting frame 1, and the operator can complete the assembly by pressing the edge of the sealing ring 2 with one hand, and it can be disassembled by simply pulling it outward.

[0037] like Figure 2 As shown, the sealing ring 2 is fitted outside the mounting frame 1, and the actual contact area between the sealing ring 2 and the mounting frame 1 is smaller than the corresponding contact surface area of ​​the mounting frame 1; the contact area between the sealing ring 2 and the mounting frame 1 is only 60% of the corresponding surface area of ​​the frame, reducing the sliding friction force from 50N in the traditional full contact structure to 18N, enabling assembly and disassembly to be completed within 30 seconds with one hand; the contact surface adopts a wavy structure with a contact point spacing of 2mm, allowing the sealing ring 2 to expand laterally by 0.5mm under pressure, avoiding assembly interference; when the test gas pressure reaches 0.6MPa, the non-contact area of ​​the sealing ring 2 produces 10% elastic deformation, automatically filling the tiny scratches (≤0.05mm) on the product sealing surface; the gap between the contact surfaces forms an annular air passage (cross-sectional area 1). The gas flow is 2mm², allowing the test gas to enter through the air passage 14 and form a spiral airflow along the inner wall of the sealing ring 2, shortening the pressure balance time to less than 8 seconds; two pressure monitoring points are set in the non-contact area to judge the sealing status in real time by the pressure difference (ΔP≤0.02MPa), with a detection sensitivity of 0.05sccm; the contact point adopts a spherical protrusion 15 design (radius 1mm), which reduces the maximum equivalent stress value from 15MPa in planar contact to 9MPa (ANSYS simulation data), extending the service life of the sealing ring 2 to more than 5000 times; the contact surface is coated with a 0.02mm thick DLC coating, reducing the coefficient of friction from 0.25 to 0.1, and the coating wear is <0.005mm after 200,000 assembly and disassembly tests.

[0038] like Figure 4 As shown, the outer side of the sealing ring 2 is provided with a rounded corner 25; the rounded corner 25 structure avoids the formation of sharp edges on the edge of the sealing ring 2, and the contact pressure of the operator's hand during assembly is reduced from 50N in the right-angle design to 15N, reducing the risk of scratches.

[0039] like Figure 4 As shown, a chamfer 24 is provided at the connection between the sealing ring 2 and the mounting frame 1; a 15° chamfer 24 is provided at the connection between the sealing ring 2 and the mounting frame 1 to form a tapered guide surface, so that the automatic positioning error of the sealing ring 2 during assembly is ≤0.1mm, and the assembly efficiency is improved by 40%.

[0040] like Figure 1 As shown, the mounting frame 1 includes a base 11 and a mounting post 12 disposed on the edge of the base 11. The base 11 has mounting holes 13. By setting mounting holes 13, the manufacturing cost can be reduced while ensuring that the strength meets the requirements.

[0041] Furthermore, the mounting frame 1 is made of aluminum alloy with an anodized finish. The aluminum alloy has a bending modulus of 72,000 MPa (far exceeding the 18,000 MPa of PA66 + glass fiber), ensuring that the deformation of the mounting frame 1 is ≤0.05 mm under a test pressure of 0.6 MPa. The aluminum alloy has a density of 2.7 g / cm³, which is 60% lighter than steel, making it easier to integrate and transport equipment. After anodizing, the surface hardness reaches 250-500 HV, which is 3-5 times higher than the hardness of the base material. After 200,000 assembly and disassembly tests, the wear of the clips 26 is <0.01 mm.

[0042] Example 2

[0043] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, unlike in Embodiment 1, the buckle 26 is an external buckle type, and the mounting frame 1 does not have an air vent 14. The mounting frame 1 has a groove 16 that matches the buckle 26. The entire tape replacement can be completed by simply removing the worn sealing ring 2 by hand and then pressing the new sealing ring 2 that needs to be replaced on, which improves the efficiency of the sealing ring 2 replacement.

[0044] like Figure 8 As shown, the inner side of the sealing ring 2 is a solid structure, and the outer surface of the sealing ring 2 forms a sealing surface 22; to prevent gas from leaking directly from the tank.

[0045] Working principle: When replacing the quick-release hole area sealing ring 2, simply remove the worn sealing ring 2 by hand, and then press the new sealing ring 2 to be replaced to complete the entire tape replacement operation.

[0046] In summary, this quick-change hole area airtightness test sealing ring 2 installation structure allows for easy replacement of the worn sealing ring 2 by simply removing it by hand and pressing the new sealing ring 2 onto it. This significantly reduces equipment downtime caused by replacing the sealing ring 2. The included clip 26 prevents the sealing ring 2 from falling off and facilitates quick replacement. The support surface 23 supports the sealing ring 2 in contact with the product and prevents deformation, maintaining a proper seal.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick change orifice area air tightness test seal ring mounting structure, characterized in that: Includes a sealing ring (2), with a buckle (26) on the inner side of one end of the sealing ring (2) and a support surface (23) inside the other end of the sealing ring (2); The mounting frame (1) is provided with a groove (16) or protrusion (15) that matches the buckle (26), and is connected to the sealing ring (2) by a quick-release method; An air vent (14) is provided at a radial position on the mounting frame (1), and its diameter is smaller than that of the test product. The sealing ring (2) is detachably connected to the mounting frame (1) via a snap fastener (26).

2. The quick-change hole area airtightness test sealing ring installation structure according to claim 1, characterized in that: The sealing ring (2) has an air passage hole (21) in the middle that corresponds to the air passage hole (14).

3. The quick-change orifice area airtight test seal ring mounting structure according to claim 1, characterized in that: The buckle (26) is either an internal buckle or an external buckle.

4. The quick change orifice area air tight test seal ring mounting structure of claim 1, wherein: The sealing ring (2) is fitted outside the mounting frame (1), and the actual contact area between the sealing ring (2) and the mounting frame (1) is smaller than the corresponding contact area of ​​the mounting frame (1).

5. The quick change orifice area air tight test seal ring mounting structure of claim 1, wherein: The sealing ring (2) has a rounded corner (25) on the outside.

6. The quick change orifice area air tight test seal ring mounting structure of claim 1, wherein: The connection between the sealing ring (2) and the mounting frame (1) is chamfered (24).

7. The quick change orifice area air tight test seal ring mounting structure of claim 1, wherein: The sealing ring (2) is made of PU plastic.

8. The quick change orifice area air tight test seal ring mounting structure of claim 1, wherein: The mounting frame (1) includes a base (11) and a mounting post (12) disposed at the edge of the base (11).

9. The quick change orifice area air tight test seal ring mounting structure according to claim 8, characterized in that: The base (11) has mounting holes (13).

10. The quick change orifice area air tight test seal ring mounting structure of claim 1, wherein: The mounting frame (1) is made of aluminum alloy and has an anodized layer on its surface.

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