Cushion piece, sealing assembly and air tightness testing equipment
By designing pads and fasteners that resemble curved or inclined surfaces, the problem of sealing threaded holes with curved end faces was solved, achieving a stable and reliable sealing effect, simplifying the operation process, and improving the efficiency of airtightness testing and product quality.
Patent Information
- Application Number
- CN202423228209.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In the existing technology, it is difficult to achieve a reliable seal for threaded holes with curved end faces. Conventional sealing methods have problems such as easy leakage due to improper operation, long drying time of sealant, and residual adhesive affecting product quality, resulting in complex and inefficient airtightness testing.
Design a gasket including a body and a sealing ring. The second end face of the body is similar to the curved or inclined surface of the object to be sealed. A fastener is inserted through a first through hole. The sealing fit between the first and second end faces achieves a stable seal with the curved or inclined surface. The gasket can be a rigid body or a hard sealing rubber material, and is equipped with an anti-rotation retaining part to prevent rotation.
It improves the sealing reliability of threaded holes with curved end faces, simplifies the operation process, reduces the use of sealant, shortens the testing time, and improves the efficiency of airtightness testing and product quality.
Smart Images
Figure CN223740003U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gasket technology, and in particular to a gasket, sealing assembly and airtightness testing equipment. Background Technology
[0002] In the field of airtightness testing technology, when testing non-sealed workpieces, the various ports are usually sealed to form a sealed workpiece cavity. Then, a certain pressure of gas is introduced, and after standing still for a period of time, the output change of the differential pressure sensor of the airtightness tester is observed to determine the airtightness of the workpiece under test.
[0003] Threaded holes with flat end faces are typically used Figure 1 The sealing method shown is used for sealing. Sealing is achieved through fastener 4 and a gasket, which is a standard O-ring. For sealing threaded holes with curved end faces, sealant is typically used. The sealant is applied to the threaded hole and tightened with screws. A sealing test is performed after the sealant has dried.
[0004] Figure 2 and Figure 3 The object to be sealed, 100, is also called a connecting ring. The connecting ring can be a hollow truncated pillar structure with large circular holes on the upper and lower surfaces and multiple openings 110 on the side. During airtightness testing, all openings 110 on the connecting ring must be sealed. However, since this part has openings 110 in multiple directions and angles that need to be sealed, designing a sealing fixture that considers sealing all the holes would be complex and difficult.
[0005] For details, see the diagram. Figure 2 and Figure 3 The connecting ring has an inclined curved surface on its side, with a ring of openings 110 on its surrounding sidewalls, which can be threaded holes. For threaded holes with sealing threads, mating plugs are usually used for tightening and sealing. However, the threaded holes on the curved surface of the connecting ring are not designed with sealing threads and are distributed at a certain angle on the curved surface of the connecting ring. Using the commonly used axial rubber ring sealing and tightening method, the axial rubber ring is easily compressed and deformed, resulting in unreliable sealing and tightening, and the axial rubber ring cannot tightly fit the corresponding end face, causing air leakage.
[0006] Therefore, we used sealant for sealing. We applied the sealant to the threaded hole and tightened it with screws. After the sealant dried, we conducted a sealing test. However, this sealing method has the following three problems:
[0007] ① Improper application of adhesive during the operation can easily lead to poor sealing, causing leakage and affecting the sealing test results;
[0008] ②The sealing glue has a long dry time, which increases the product air tightness test time and prolongs the product processing cycle;
[0009] ③After the test is completed, the glue is easily left in the screw thread of the glue sealing place after the screw is removed, which is difficult to remove completely, causing product excess hidden dangers and affecting product quality. Meanwhile, the dry glue left on the screw affects subsequent secondary use and test efficiency.
[0010] Therefore, it is urgent to provide a gasket, a sealing assembly and an air tightness test device, which have the advantages of simple structure, convenient use and improved sealing effect of the opening, so as to improve the subsequent air tightness test. Content of the utility model
[0011] Based on the above, the purpose of the utility model is to provide a gasket, a sealing assembly and an air tightness test device, which have the advantages of simple structure, convenient use and improved sealing effect of the opening, so as to improve the subsequent air tightness test.
[0012] To achieve the above purpose, the utility model adopts the following technical scheme:
[0013] The first aspect of the application provides a gasket, which is used for clamping between a fastener and an object to be sealed when the fastener seals an opening of the object to be sealed, and the gasket comprises a main body, and the main body comprises:
[0014] A first end face is used for forming a sealing fit with the fastener;
[0015] A second end face is opposite to the first end face along a first direction, and the second end face comprises a curved surface and / or an inclined surface structure and is configured to be similar to the shape of a curved surface and / or an inclined surface of the object to be sealed, so as to form a sealing fit;
[0016] A first through hole penetrates the first end face and the second end face along the first direction, and is used for penetrating the fastener.
[0017] In some embodiments, the gasket comprises:
[0018] A first sealing ring is arranged on the second end face.
[0019] In some embodiments, the gasket further comprises:
[0020] A second sealing ring is arranged on the first end face.
[0021] In some embodiments, the second end face is provided with a first accommodating groove, and part of the first sealing ring is embedded in the first accommodating groove; and / or,
[0022] The first end face is provided with a second accommodating groove, and part of the second sealing ring is embedded in the second accommodating groove.
[0023] In some embodiments, the main body is rigid; and / or,
[0024] The main body further has a circumferential side surface, one end of the circumferential side surface being connected to the first end face and the other end being connected to the second end face, the circumferential side surface being formed with an anti-rotation clamping portion, the anti-rotation clamping portion being a clamping groove formed in the circumferential side surface or a clamping protrusion protruding from the circumferential side surface.
[0025] In some embodiments, the pad is made of hard sealing rubber material in one piece; and / or, the pad is a non-rotating body.
[0026] The second aspect of the present application provides a sealing assembly, which comprises:
[0027] A fastener configured to seal an opening of an object to be sealed;
[0028] The pad of any of the above-mentioned embodiments is configured to be clamped between the fastener and the object to be sealed, so as to seal the opening in cooperation with the fastener.
[0029] In some embodiments, the fastener comprises a fixedly connected screw rod portion and a head portion, the screw rod portion being used to threadedly cooperate with the opening, and the head portion being used to form a sealing cooperation with the first end face.
[0030] In some embodiments, the head portion has a smooth end face, and the smooth end face forms a sealing cooperation with the first end face.
[0031] The third aspect of the present application provides an air tightness testing device, which comprises the pad according to any of the above-mentioned embodiments, or the sealing assembly according to any of the above-mentioned embodiments.
[0032] The present application has the following beneficial effects:
[0033] The gasket is clamped between the fastener and the object to be sealed, and the second end surface of the gasket is added, which can form a sealing fit with the curved and / or inclined surface of the object to be sealed, and the first end surface of the gasket forms a sealing fit with the fastener, thereby improving the sealing effect of the opening, and the structure is simple, convenient to use, and conducive to improving the subsequent air tightness test. BRIEF DESCRIPTION OF DRAWINGS
[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present application and the drawings without creative labor.
[0035] Figure 1 A sealing mode schematic diagram of a threaded hole with a flat end surface in the prior art;
[0036] Figure 2 A bottom view of an object to be sealed in the prior art;
[0037] Figure 3 A side view of an object to be sealed in the prior art;
[0038] Figure 4 A cross-sectional view of the gasket cooperating with the fastener to seal the object to be sealed in some embodiments of the present application;
[0039] Figure 5 A three-dimensional schematic diagram of the gasket in some embodiments of the present application Figure 1 ;
[0040] Figure 6 A three-dimensional schematic diagram of the gasket in some embodiments of the present application Figure 2 ;
[0041] Figure 7 A cross-sectional view of the gasket cooperating with the fastener to seal the object to be sealed in some embodiments of the present application;
[0042] Figure 8 Fig. 2 is a partial cross-sectional view showing a gasket cooperating with a fastener to seal a portion of an article to be sealed in some embodiments of the present application.
[0043] In the drawings:
[0044] 100, article to be sealed; 110, opening;
[0045] X, first direction;
[0046] 1, main body; 11, first end face; 111, second receiving groove; 12, second end face; 121, first receiving groove; 13, first through hole; 14, peripheral side face; 15, anti-rotation retaining portion; 2, first sealing ring; 3, second sealing ring; 4, fastener; 41, screw rod portion; 42, head portion; 421, flat end face. DETAILED DESCRIPTION
[0047] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0048] In the description of the present application, unless explicitly defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0049] In the present application, unless explicitly defined and limited otherwise, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first feature and the second feature, or it can include that the first feature and the second feature are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0050] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.
[0051] With reference to Figures 4-8 The embodiments of the present application provide a gasket for being clamped between a fastener 4 and an object to be sealed 100 when the fastener 4 seals an opening 110 of the object to be sealed 100, so as to seal the opening 110 with the fastener 4, the gasket comprising a main body 1, the main body 1 comprising a first end face 11, a second end face 12 and a first through hole 13. The first end face 11 is used to form a sealing fit with the fastener 4; the second end face 12 is opposite to the first end face 11 along a first direction X, and the second end face 12 comprises a curved surface and / or an inclined surface structure, and the second end face 12 is configured to be similar in shape to a curved surface and / or an inclined surface of the object to be sealed 100, so as to form a sealing fit; the first through hole 13 penetrates the first end face 11 and the second end face 12 along the first direction X, and the first through hole 13 is used to pass through the fastener 4. The gasket is clamped between the fastener 4 and the object to be sealed 100, and the second end face 12 is additionally provided to form a sealing fit with the curved surface and / or the inclined surface of the object to be sealed 100, while the first end face 11 of the gasket forms a sealing fit with the fastener 4, which is beneficial to improve the sealing effect of the opening 110, has a simple structure, is convenient to use, and is beneficial to improve the subsequent air tightness test.
[0052] In some embodiments, with reference to Figures 4-8 The gasket further comprises a first sealing ring 2. The main body 1 has a first end face 11 and a second end face 12 opposite along a first direction X, and the first through hole 13 is provided in the main body 1, and the second end face 12 is similar in shape to a curved surface and / or an inclined surface of the object to be sealed 100; the first sealing ring 2 is arranged on the second end face 12 to realize a sealing fit. It provides the second end face 12 which is similar in shape to the curved surface and / or the inclined surface of the object to be sealed 100 through the main body 1, and then the first sealing ring 2 is pressed and fitted on the curved surface and / or the inclined surface of the object to be sealed 100 through the second end face 12, to form a stable and reliable sealing fit, which has a simple structure, low cost, and can flexibly replace the material and hardness of the main body 1.
[0053] Specifically, with reference to Figures 4-8, the curved surface structure of the second end face 12 can be a generally concave curved surface, or, in other scenarios, a generally convex curved surface, or, an inclined surface. More specifically, the curved surface structure of the second end face 12 can be an inclined surface. So that the second end face 12 can be adapted to the curved and / or inclined surface of the object 100 to be sealed, and the fastener 4 can be smoothly sealed on the corresponding opening 110.
[0054] In some embodiments, referring to Figures 4-8 , the main body 1 is rigid, and the main body 1 is made of metal, hard plastic, wood or stone. Preferably, the main body 1 can be selected to be the same as the material of the object 100 to be sealed, for example, metal material can be realized.
[0055] Referring to Figures 4-8 , in the embodiment in which the gasket comprises the main body 1 and the first sealing ring 2, the sealing between the main body 1 and the fastener 4 is realized. In some embodiments, the gasket further comprises a second sealing ring 3. The second sealing ring 3 is arranged on the first end face 11 to realize sealing cooperation, which is simple in structure and easy to realize.
[0056] Referring to Figures 4-8 , in some embodiments, the second end face 12 is provided with a first accommodating groove 121, and part of the first sealing ring 2 is embedded in the first accommodating groove 121, thereby realizing a certain degree of limiting of the first sealing ring 2 on one hand, and increasing the contact area on the other hand, so that the sealing is more reliable.
[0057] In some embodiments, referring to Figures 4-8 , the first end face 11 is provided with a second accommodating groove 111, and part of the second sealing ring 3 is embedded in the second accommodating groove 111, thereby realizing a certain degree of limiting of the second sealing ring 3 on one hand, and increasing the contact area on the other hand, so that the sealing is more reliable.
[0058] Referring to Figures 4-8 , in some embodiments, the gasket is a non-rotational body. Assuming two points at the two ends of an object, and connecting the two points to form a line through the object, the object rotates around this line, and each part of the object rotates to a fixed position at the same time. This is a rotational body. The characteristic of the rotational body is that the two sides of the center line are symmetrical, so the rotational body is basically symmetrical. In the scenario in which the fastener 4 is a bolt, a wrench is needed to thread the bolt with the opening 110. In order to limit the rotation of the gasket, the gasket is a non-rotational body, so that the gasket can be clamped by a clamp or the like to prevent rotation, facilitating sealing assembly. For example, the side surface of the gasket can have anti-slip lines, and the gasket can be a square column extending in a generally first direction X.
[0059] And in the embodiment in which the gasket comprises the main body 1 and the first sealing ring 2, referring to Figures 4-8In some embodiments, the main body 1 further has a circumferential side surface 14, one end of the circumferential side surface 14 of the main body 1 is connected to the first end surface 11, the other end of the circumferential side surface 14 of the main body 1 is connected to the second end surface 12, the circumferential side surface 14 of the main body 1 is formed with an anti-rotation clamping part 15, which is a clamping groove formed in the circumferential side surface 14 or a clamping protrusion protruding from the circumferential side surface 14. In the scenario where the fastener 4 is a bolt, a screwdriver is needed to thread the bolt with the opening 110, in order to limit the rotation of the main body 1, the circumferential side surface 14 of the main body 1 is formed with the anti-rotation clamping part 15, so that the main body 1 can be clamped by a tool such as a clamp to prevent rotation, facilitating sealing assembly.
[0060] In addition, in some embodiments, the gasket can be a hard sealing rubber material formed integrally. On the one hand, it provides sufficient rigidity and hardness, and on the other hand, the sealing effect of the hard sealing rubber material forms a sealing fit between the first end surface 11 and the second end surface 12. Similarly, in the scenario where the fastener 4 is a bolt, a screwdriver is needed to thread the bolt with the opening 110, in order to limit the rotation of the gasket, the gasket is a non-rotating body, so that the gasket can be clamped by a tool such as a clamp to prevent rotation, facilitating sealing assembly. For example, the side surface of the gasket can have anti-slip lines, the gasket can be a square column extending in the first direction X, etc.
[0061] Reference Figures 4-8 The embodiments of the present application also provide a sealing assembly, which comprises the fastener 4 and the gasket of any one of the above embodiments. The fastener 4 is configured to block the opening 110 of the object 100 to be sealed; the gasket is configured to be clamped between the fastener 4 and the object 100 to be sealed, and the gasket seals the opening 110 in cooperation with the fastener 4.
[0062] Specifically, in some embodiments, with reference to Figures 4-8 The fastener 4 comprises a fixedly connected screw rod part 41 and a head part 42, the screw rod part 41 is used to thread with the opening 110, and the head part 42 is used to form a sealing fit with the first end surface 11.
[0063] In some embodiments, with reference to Figures 4-8 The head part 42 has a smooth end surface 421, which forms a sealing fit with the first end surface 11, thereby reducing the frictional resistance between the head part 42 and the first end surface 11 when the fastener 4 is screwed, and specifically, for example, reducing the frictional resistance between the second sealing ring 3 and the smooth end surface 421, thereby alleviating the frictional damage to the second sealing ring 3, etc.
[0064] Reference Figures 4-8The embodiments of the present application provide airtightness testing equipment, which comprises the gasket according to any one of the above embodiments, or the sealing assembly of any one of the above embodiments. By using the gasket to cooperate with the fastener 4, the opening 110 on the curved and / or inclined surface of the object to be sealed 100 can be quickly, conveniently and reliably sealed. The airtightness testing equipment can further comprise a gas pressure detection device and an inflation device. After the opening 110 of the object to be sealed 100 is sealed, the existing gas pressure detection device and inflation device and the corresponding method can be used to perform airtightness testing, and details are not described herein.
[0065] It should be noted that the above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.
Claims
1. A gasket for sandwiching between a fastener (4) and an article (100) to be sealed when the fastener (4) is used to seal an opening (110) of the article (100) to be sealed, characterized in that, The gasket comprises a main body (1), the main body (1) comprises: a first end face (11) configured to form a sealing fit with the fastener (4); a second end face (12) opposite to the first end face (11) along a first direction (X), and the second end face (12) comprises a curved surface and / or an inclined surface structure and is configured to be similar to the shape of a curved surface and / or an inclined surface of the object to be sealed (100) for forming a sealing fit; a first through hole (13) penetrating through the first end face (11) and the second end face (12) along the first direction (X) for penetrating the fastener (4).
2. The mat of claim 1, wherein, The gasket comprises: a first sealing ring (2) arranged on the second end face (12).
3. The mat of claim 2, wherein, The gasket further comprises: a second sealing ring (3) arranged on the first end face (11).
4. The mat of claim 3, wherein, The second end face (12) is provided with a first accommodating groove (121), and part of the first sealing ring (2) is embedded in the first accommodating groove (121); and / or, The first end face (11) is provided with a second accommodating groove (111), and part of the second sealing ring (3) is embedded in the second accommodating groove (111).
5. The gasket according to claim 1, wherein: the main body (1) is a rigid body; and / or, the main body (1) further has a circumferential side face (14), one end of the circumferential side face (14) is connected to the first end face (11), and the other end is connected to the second end face (12), the circumferential side face (14) is formed with an anti-rotation clamping portion (15), the anti-rotation clamping portion (15) is a clamping groove formed on the circumferential side face (14) or a clamping protrusion protruding from the circumferential side face (14).
6. The mat of claim 1, wherein, The gasket is an integral hard sealing rubber material; and / or, the gasket is a non-rotating body.
7. A seal assembly characterized by, It comprises: a fastener (4) configured to block an opening (110) of an object to be sealed (100); The gasket according to any one of claims 1-6 is configured to be clamped between the fastener (4) and the object to be sealed (100) to cooperate with the fastener (4) to seal the opening (110).
8. The seal assembly of claim 7, wherein, The fastener (4) comprises a fixedly connected screw rod portion (41) and a head portion (42), the screw rod portion (41) is configured to threadedly cooperate with the opening (110), and the head portion (42) is configured to form a sealing fit with the first end face (11).
9. The seal assembly of claim 8, wherein, The head portion (42) has a smooth end face (421) configured to form a sealing fit with the first end face (11).
10. A leak test apparatus characterized by, It comprises the gasket according to any one of claims 1-6, or the sealing assembly according to any one of claims 7-9.