Metal seal ring structure comprising a disc spring pair

Abstract

The application relates to the technical field of engineering sealing, in particular to a metal sealing ring structure comprising a disc spring counter-elastic system. The metal sealing ring structure comprises a structure body, a disc spring counter-elastic system and a sealing body. The structure body is provided with a first supporting part, a second supporting part and a connecting part, the connecting part is provided with a first avoiding through hole, the first supporting part and the second supporting part are connected with the connecting part respectively, the first supporting part is provided with a first supporting surface, and the second supporting part is provided with a second supporting surface. The disc spring counter-elastic system is arranged between the first supporting part and the second supporting part, and is used for enabling the first supporting part and the second supporting part to have a mutual moving trend of moving away from each other. The sealing body comprises a first sealing body and a second sealing body, the first sealing body is located on the first supporting surface, and the second sealing body is located on the second supporting surface. The application can provide stable and reliable sealing effect, and is suitable for the full-metal sealing demand of pipeline flanges below DN65, such as nuclear energy and hydrogen energy.

Description

Technical Field

[0001] This application relates to the field of engineering sealing technology, and more specifically, to a metal sealing ring structure comprising a disc spring mating elastic system. Background Technology

[0002] In the development of the neutron flux monitoring system for the International Thermonuclear Experimental Reactor (ITER), all-metal sealing rings are typically used to seal the flanges of hydrogen and its isotopes pipelines. These all-metal sealing rings are similar to C-rings, with an inner layer consisting of a tightly wound, circular helical spring welded to both ends. This sealing ring structure is suitable for pipelines with a diameter of DN65 or larger. However, for pipelines smaller than DN65, if C-rings are still used, the bending radius of the spring needs to be reduced. This results in a significant difference in the pitch of the inner and outer arcs of the bent spring, altering its mechanical properties and making it difficult to guarantee sealing performance. Furthermore, C-rings are expensive to manufacture. Therefore, there is an urgent need to design a new sealing structure suitable for sealing pipelines smaller than DN65 while simultaneously reducing manufacturing costs. Summary of the Invention

[0003] This application addresses the problems encountered in the prior art by providing a metal sealing ring structure that includes a disc spring mating elastic system. The structure utilizes multiple components to form an elastic system, and the elastic potential energy stored under pressure in the elastic system is converted into elastic force, enabling the sealing body to form an effective seal with the upstream and downstream components, thus meeting the all-metal sealing requirements of pipe flanges below DN65.

[0004] This application is achieved through the following technical solution:

[0005] A metal sealing ring structure comprising a disc spring engagement elastic system includes:

[0006] The structure has a first support part, a second support part, and a connecting part. The connecting part is provided with a first clearance through hole. The first support part and the second support part are respectively connected to the connecting part and symmetrically located at both ends of the extension direction of the first clearance through hole. The first support part is provided with a first support surface, and the second support part is provided with a second support surface.

[0007] A disc spring mating elastic system includes a first disc spring and a second disc spring, which are mated and sleeved on the outer cylindrical surface of the connecting part; the first support part is connected to the inner side of the first disc spring, and the second support part is connected to the inner side of the second disc spring, with the first and second disc springs located between the first and second support parts; when the distance between the first and second support parts decreases in the extension direction of the first clearance through hole, the first and second disc springs simultaneously undergo equal elastic deformation, causing the first and second support parts to have a tendency to move away from each other.

[0008] A sealing body, comprising a first sealing body and a second sealing body, wherein the first sealing body is located on the first support surface to contact an upstream component, and the second sealing body is located below the second support surface to contact a downstream component.

[0009] In some alternative embodiments, the sealing body is configured as a soft metal body.

[0010] In some alternative embodiments, the hardness of the seal is 18–35 HV.

[0011] In some alternative embodiments, the sealing body is configured as a silver body.

[0012] In some alternative embodiments, the structure has a yield strength of 55 MPa to 220 MPa at 20°C.

[0013] In some alternative embodiments, the structure and the sealing body are an integral structure, wherein the sealing body is configured with a silver plating layer.

[0014] In some alternative embodiments, the ratio of the inner cone height to the thickness of the first disc spring and the second disc spring is configured to be 0.3 to 0.7.

[0015] In some alternative implementations, the ratio of the inner cone height to the thickness of the first and second disc springs is configured to be 0.4.

[0016] In some alternative embodiments, the ratio of the outer diameter to the inner diameter of the first disc spring and the second disc spring is configured to be 1.25 to 1.77.

[0017] Compared with the prior art, this application has the following advantages and beneficial effects:

[0018] This application provides a metal sealing ring structure including a disc spring engagement elastic system. The structure provides stable support for the entire sealing ring structure. When it cooperates with the upstream and downstream components, the upstream and downstream components can respectively form contact pressure with the first support and the second support. Consequently, the first sealing body on the first support and the second sealing body under the second support can form a sealing contact with the upstream and downstream components. While the sealing ring structure is compressed, the disc spring engagement elastic system between the first and second support components stores elastic potential energy, causing the first and second support components to tend to move away from each other. Thus, even if the structure vibrates or the temperature changes, causing the sealing body to detach from the upstream / downstream component, the first and second support components can generate continuous contact pressure with the upstream and downstream components under the action of the disc spring engagement elastic system. That is, the first and second sealing bodies can always be tightly connected to the upstream and downstream components, thereby achieving a stable seal. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the exemplary embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a metal sealing ring structure including a disc spring engagement elastic system is provided for an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure provided in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the sealing body structure provided in an embodiment of this application.

[0023] The attached diagram shows the markings and corresponding component names:

[0024] 1-First disc spring, 2-Second disc spring, 3-Structure, 31-First support, 32-Second support, 33-Connecting part, 4-Sealing body, 41-First sealing body, 42-Second sealing body. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this application are only for explaining this application and are not intended to limit this application.

[0026] In the following description, numerous specific details are set forth in order to provide a thorough understanding of this application. However, it will be apparent to those skilled in the art that these specific details are not necessary to implement this application. In other embodiments, well-known structures, circuits, materials, or methods are not specifically described in order to avoid obscuring this application.

[0027] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of this application. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In the description of this application, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, 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. Therefore, they should not be construed as limiting the scope of protection of this application.

[0029] like Figures 1-3 As shown, this application provides a metal sealing ring structure including a disc spring mating elastic system. The metal sealing ring structure including a disc spring mating elastic system includes a structure 3, a disc spring mating elastic system, and a sealing body 4.

[0030] The structure 3 has a first support portion 31, a second support portion 32, and a connecting portion 33. The first support portion 31 and the second support portion 32 are respectively connected to the connecting portion 33. In actual implementation, the first support portion 31, the second support portion 32, and the connecting portion 33 can be constructed as an integrally formed structure to ensure the structural strength of the structure 3. A first clearance through hole is provided on the connecting portion 33 for the flow of materials. The first clearance through hole is configured as a circular hole. The first support portion 31 and the second support portion 32 are located at opposite ends in the extension direction of the first clearance through hole. A first support surface is provided on the first support portion 31, and a second support surface is provided below the second support portion 32.

[0031] The disc spring engagement elastic system may include a first disc spring 1 and a second disc spring 2. After engagement, the first disc spring 1 and the second disc spring 2 are sleeved on the outer cylindrical surface of the connecting portion 33. Furthermore, a first support portion 31 is connected to the inner side of the first disc spring 1, and a second support portion 32 is connected to the inner side of the second disc spring 2. The first disc spring 1 and the second disc spring 2 are located between the first support portion 31 and the second support portion 32. When the distance between the first support portion 31 and the second support portion 32 decreases in the direction of the first clearance through hole, the first disc spring 1 and the second disc spring 2 simultaneously undergo equal elastic deformation, causing the first support portion 31 and the second disc spring 2 to... The support parts 32 have a tendency to move away from each other; wherein, before processing, the structure 3 can be a tubular component. First, the first support part 31 is formed at one end of the structure 3 by stamping or spinning. The other end of the structure 3 is inserted into the inner ring of the mating first disc spring 1 and second disc spring 2. Then, the other end of the structure 3 is formed into the second support part 32 by stamping or spinning. Thus, the inner side of the first disc spring 1 can form a tight contact with the first support part 31, and the inner side of the second disc spring 2 can form a tight contact with the second support part 32. In this way, the first disc spring 1 and the second disc spring 2 can respond sensitively to the force and deform.

[0032] The sealing body 4 includes a first sealing body 41 and a second sealing body 42. The first sealing body 41 is located on the first support surface to contact the upstream component, and the second sealing body 42 is located below the second support surface to contact the downstream component.

[0033] In use, the upstream and downstream components are typically pipes, connected by their respective flanges. A sealing ring structure is placed between the upstream and downstream components, and the first clearance through-hole in the sealing ring structure connects them. The flanges of the upstream and downstream components are fastened together with bolts. During the connection process, the two flanges compress the sealing ring structure, allowing the first sealing body 41 and the second sealing body 42 on the sealing ring structure to make tight contact with the flange faces of the upstream and downstream components. At this time, the first clearance through-hole is in a relatively sealed environment, preventing leakage of substances flowing through it. Simultaneously, the disc spring engagement elastic system between the first support 31 and the second support 32 undergoes elastic deformation to store elastic potential energy. When the connection structure is subjected to vibration or temperature changes, the distance between the two flanges will slightly change. At this time, the disc spring engagement elastic system holds the first support 31 and the second support 32, ensuring that the first sealing body 41 and the second sealing body 42 remain tightly against the two flange faces, thus providing a continuous and stable sealing effect.

[0034] During the compression of the sealing ring structure, the elastic deformation of the disc spring mating elastic system is based on the change in distance between the first support portion 31 and the second support portion 32, that is, based on the deformation of the structure 3. If the stiffness of the structure 3 is too large, the disc spring mating elastic system will not easily undergo elastic deformation. Therefore, in some optional embodiments, the first support portion 31, the second support portion 32, and the connecting portion 33 in the structure 3 are all thin-walled structures. The connecting portion 33 and the first support portion 31 can be machined from seamless tubes, and the material of the second support portion 32 is reserved at the lower part of the connecting portion 33. The mating first disc spring 1 and the second disc spring 2 are inserted, and then the second support portion 32 is formed by stamping or spinning. Of course, the first support portion 31 can also be formed by stamping or spinning. Since the structure 3 is a thin-walled structure, when the sealing ring structure is compressed, the first disc spring 1 and the second disc spring 2 will become flat and the inner diameter will shrink, causing the connecting portion 33 to bulge towards the center. The disc spring mating elastic system can effectively store elastic potential energy. More specifically, the yield strength of structure 3 at 20°C is 55MPa to 220MPa. For example, structure 3 can be configured as austenitic stainless steel with a yield strength of 172MPa, or copper with a lower yield strength for ease of manufacturing.

[0035] In this embodiment, "matching" refers to the stacking method where the outer edges of the first disc spring 1 and the second disc spring 2 are connected. By stacking the first disc spring 1 and the second disc spring 2 to form an elastic system, the inner protruding edges of the first disc spring 1 and the second disc spring 2 can fully contact the first support portion 31 and the second support portion 32 in the circumferential direction, respectively. That is, the first disc spring 1 and the second disc spring 2 can provide continuous and uniform elastic force in the circumferential direction to the first support portion 31 and the second support portion 32, thereby ensuring that the first sealing body 41 and the second sealing body 42 are in full contact with the upstream and downstream components, thus ensuring a good sealing effect.

[0036] When the disc spring mating elastic system is fitted into the connecting part 33 through the mating and stacking of the first disc spring 1 and the second disc spring 2, the connecting part 33 can make the first disc spring 1 and the second disc spring 2 coaxial; the connection configuration of the first support part 31 and the second support part 32 with the connecting part 33 can be configured such that the first support part 31 and the second support part 32 are respectively attached to the convex surfaces of the first disc spring 1 and the second disc spring 2, so that the first support part 31 and the second support part 32 can play an axial limiting role for the first disc spring 1 and the second disc spring 2.

[0037] Typically, the deformation load curve of a disc spring is non-linear. When the sealing ring structure is compressed, causing elastic deformation of the disc spring's mating elastic system, the stored elastic potential energy changes unevenly. This can lead to seal failure when the structure vibrates or the temperature changes. In practice, it is preferable that the deformation load curve of the disc spring be a straight line. Therefore, in some optional embodiments, the ratio of the inner cone height to the thickness of the first disc spring 1 and the second disc spring 2 is configured to be 0.3 to 0.7. This ensures that after a certain amount of deformation, the load change of the first disc spring 1 and the second disc spring 2 is relatively stable, which is beneficial for maintaining a good sealing effect when the structure vibrates or the temperature changes. In actual implementation, the ratio of the inner cone height to the thickness of the first disc spring 1 and the second disc spring 2 is configured to be 0.4. When the ratio of the inner cone height to the thickness is 0.4, the deformation load curves of the first disc spring 1 and the second disc spring 2 are approximately a straight line. Furthermore, the ratio of the outer diameter to the inner diameter of the first disc spring 1 and the second disc spring 2 is configured to be 1.25 to 1.77. When the ratio of the inner cone height to the thickness of the first disc spring 1 and the second disc spring 2 is 0.4, configuring the ratio of the outer diameter to the inner diameter of the first disc spring 1 and the second disc spring 2 to be 1.25 to 1.77 can ensure that the elastic potential energy of the material per unit volume is sufficient and that the first disc spring 1 and the second disc spring 2 are easy to process and manufacture.

[0038] In some alternative embodiments, the sealing body 4 can be configured as a soft metal body. Soft metal bodies have good ductility and are easy to undergo plastic deformation, which can fill the small depressions on the upstream and downstream flange sealing surfaces, thereby achieving a seal. In specific implementations, the hardness of the sealing body 4 is configured to be 18-35 HV.

[0039] Furthermore, the sealing body 4 can be configured as a silver material. Silver material has good ductility and can fit tightly against the flange face under pressure, thus providing a good sealing effect over a long period. When the sealing body 4 is set as a silver material, its hardness is configured to 25HV.

[0040] The sealing body 4 can be disposed on the structure by covering it, that is, the first sealing body 41 and the second sealing body 42 are configured as a whole. The sealing body 4 covers the structure from the inside of the connecting part 33 (i.e. the first clearance through hole). In this way, when the first support part 31 and the second support part 32 press on the sealing body 4, the upper and lower sealing body 4 parts can restrict each other's position, thereby preventing the sealing body 4 from moving.

[0041] In some alternative embodiments, the sealing body 4 and the structure 3 can be an integral structure, wherein the sealing body 4 is configured with a silver plating layer, such as silver-plated stainless steel or silver-plated copper.

[0042] In summary, this application, by configuring the structure 3 as austenitic stainless steel with a yield strength of 172 MPa, configuring the sealing body 4 as a silver body with a hardness of 25 HV, and using two disc springs with an inner cone height-to-thickness ratio of 0.4 and an outer diameter-to-inner diameter ratio of 1.25 to 1.77, enables the sealing ring to achieve a good sealing effect in pipe sealing environments below DN65, and to provide a stable and effective sealing effect when the structure vibrates or the temperature changes.

[0043] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A metal sealing ring structure comprising a disc spring engagement elastic system, characterized in that, include: The structure (3) has a first support part (31), a second support part (32) and a connecting part (33). The connecting part (33) is provided with a first clearance through hole. The first support part (31) and the second support part (32) are respectively connected to the connecting part (33) and symmetrically located at both ends of the extension direction of the first clearance through hole. The first support part (31) is provided with a first support surface, and the second support part (32) is provided with a second support surface. The structure (3) is configured to be austenitic stainless steel or copper with a yield strength of 55MPa~220MPa at 20℃. A disc spring mating elastic system, comprising a first disc spring (1) and a second disc spring (2), wherein the first disc spring (1) and the second disc spring (2) are mated and sleeved on the outer cylindrical surface of the connecting part (33); and the first support part (31) is connected to the inner side of the first disc spring (1), and the second support part (32) is connected to the inner side of the second disc spring (2), wherein the first disc spring (1) and the second disc spring (2) are located between the first support part (31) and the second support part (32); when the distance between the first support part (31) and the second support part (32) decreases in the direction of extension of the first clearance through hole, the first disc spring (1) and the second disc spring (2) undergo equal elastic deformation at the same time so that the first support part (31) and the second support part (32) have a tendency to move away from each other; wherein the ratio of the inner cone height to the thickness of the first disc spring (1) and the second disc spring (2) is configured to be 0.3~0.7; The sealing body (4) includes a first sealing body (41) and a second sealing body (42), the first sealing body (41) being located on the first support surface to contact the upstream component, and the second sealing body (42) being located below the second support surface to contact the downstream component.

2. The metal sealing ring structure comprising a disc spring engagement elastic system according to claim 1, characterized in that, The sealing body (4) is configured as a soft metal body.

3. The metal sealing ring structure comprising a disc spring engagement elastic system according to claim 2, characterized in that, The hardness of the sealing body (4) is 18~35HV.

4. The metal sealing ring structure comprising a disc spring engagement elastic system according to claim 3, characterized in that, The sealing body (4) is configured as a silver body.

5. The metal sealing ring structure comprising a disc spring engagement elastic system according to claim 1, characterized in that, The structure (3) and the sealing body (4) are an integral structure, wherein the sealing body (4) is configured with a silver plating layer.

6. The metal sealing ring structure comprising a disc spring engagement elastic system according to claim 1, characterized in that, The ratio of the inner cone height to the thickness of the first disc spring (1) and the second disc spring (2) is configured to be 0.

4.

7. The metal sealing ring structure comprising a disc spring engagement elastic system according to claim 1, characterized in that, The ratio of the outer diameter to the inner diameter of the first disc spring (1) and the second disc spring (2) is configured to be 1.25 to 1.77.

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