A high-temperature-resistant and corrosion-resistant sealing assembly

Abstract

The utility model discloses a kind of high-temperature-resistant and corrosion-resistant sealing assembly, the sealing assembly includes the metal ring with hollow cavity, annular accommodating groove is set on the both sides shaft end part of the metal ring, the sealing assembly further includes the sealing ring made of graphite material, part of the sealing ring is embedded in the accommodating groove, another part of the sealing ring is protruded to the outside of the accommodating groove along the axial direction and forms the sealing part of the sealing assembly. The metal ring of the above-mentioned metal matrix is used with the sealing ring of graphite material, so that the sealing assembly can withstand high temperature and corrosion, can be suitable for sealing in high-temperature and corrosion liquid contact sealing working condition environment, avoid the leakage problem caused by sealing assembly failure, and reduce the replacement frequency of sealing assembly.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, specifically to a sealing component that is both high-temperature resistant and corrosion resistant. Background Technology

[0002] Currently, C-rings and O-rings are widely used in the sealing connections of pressure vessels. Traditional C-rings typically consist of a spring, a metal ring, and a sealing layer; O-rings typically consist of a metal ring with an O-shaped cross-section and a sealing layer covering the outer circumference of the metal ring. During use, the sealing layer undergoes plastic deformation during compression, creating a sealing engagement with the flange face.

[0003] In existing technologies, sealing layers are typically made of flexible metals such as silver or nickel, which are formed on the outer circumference of a metal ring through plating. They can be widely used for sealing under various high temperature and high pressure conditions. However, flexible metal sealing layers such as silver and nickel layers cannot adapt to sealing environments in contact with high temperature and corrosive liquids, and there is a risk of leakage.

[0004] Therefore, it is necessary to provide a sealing component that is both resistant to high temperatures and corrosion. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sealing component that is both high-temperature resistant and corrosion resistant.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a high-temperature and corrosion-resistant sealing assembly, the sealing assembly including a metal ring with a hollow cavity, and an annular receiving groove provided on both axial ends of the metal ring. The sealing assembly also includes a sealing ring made of graphite material, a part of which is embedded in the receiving groove, and the other part of which protrudes axially from the receiving groove to form the sealing part of the sealing assembly.

[0007] In some embodiments, the cross-sectional area of ​​the sealing ring is arranged to gradually decrease along the axial direction away from the metal ring.

[0008] In some embodiments, the sealing portion has two inclined extending first side surfaces and second side surfaces, the first side surface and the second side surface intersecting to form a tip, such that the sealing portion forms a line contact seal when it engages with the surface to be sealed through the tip.

[0009] In some embodiments, the receiving groove is an arc-shaped groove recessed towards the center along the axial direction of the metal ring.

[0010] In some embodiments, the sealing ring has an arc-shaped cross-section, and the centerline of the sealing ring coincides with the centerline of the cross-section of the metal ring.

[0011] In some embodiments, the sealing ring has an inner side portion and an outer side portion that are radially spaced apart. The inner side portion fits against the groove wall of the receiving groove, and the outer side portion is located outside the receiving groove and forms a sealing surface that mates with the surface to be sealed.

[0012] In some embodiments, the metal ring is coaxially arranged with the two sealing rings, and the two sealing rings overlap each other in the same projection plane.

[0013] In some embodiments, the metal ring is a C-ring, and the sealing assembly further includes an annular spring disposed in the C-ring.

[0014] In some embodiments, the metal ring is an O-ring with an O-shaped cross-section.

[0015] In some embodiments, the metal ring is made of Inconel 600 alloy.

[0016] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model provides a sealing assembly that is both high-temperature resistant and corrosion-resistant. It achieves this by creating receiving grooves on both sides of the axial ends of a metal ring and embedding a graphite sealing ring in these grooves. A portion of the sealing ring is embedded in the receiving groove and integrated with the metal ring, while the other portion protrudes axially from the receiving groove to form the sealing part of the sealing assembly. By using the aforementioned metal-based metal ring and graphite sealing ring, this sealing assembly can withstand both high temperatures and corrosion, making it suitable for sealing applications in high-temperature and corrosive liquid contact environments. This avoids leakage problems caused by sealing assembly failure and reduces the frequency of sealing assembly replacements. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a sealing assembly according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 3 for Figure 2 A schematic diagram of the sealing components used in a sealing device;

[0021] Figure 4 This is an enlarged longitudinal cross-sectional view of a sealing assembly according to another embodiment of the present invention;

[0022] Figure 5 for Figure 4 A schematic diagram of the sealing components used in a sealing device;

[0023] in:

[0024] 10. First component; 101. Annular groove; 102. First sealing surface; 20. Second component; 201. Second sealing surface; 30. Sealing assembly;

[0025] 1. Metal ring;

[0026] 2. Sealing ring; 2a. Arc-shaped edge; 2b. Tip; 2c. First side surface; 2d. Second side surface; 2e. Inner side surface; 2f. Outer side surface;

[0027] 3. Spring. Detailed Implementation

[0028] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the advantages and features of this utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0029] Example 1

[0030] See Figure 1 , Figure 2 As shown, this embodiment provides a high-temperature and corrosion-resistant sealing assembly. The sealing assembly 30 includes a metal ring 1 with a hollow cavity, which serves as a support base. Both axial ends of the metal ring 1 are provided with annular receiving grooves. The sealing assembly 30 also includes a sealing ring 2 made of graphite material. A portion of the sealing ring 2 is embedded in the receiving groove, and the other portion of the sealing ring 2 protrudes axially out of the receiving groove to form a sealing part of the sealing assembly 30.

[0031] In this embodiment, the metal ring 1 is specifically a C-shaped ring, that is, the longitudinal section of the metal ring 1 is C-shaped, and it has an opening facing one side radially, which communicates with its hollow cavity. The sealing assembly 30 also includes an annular spring 3 disposed in the C-shaped ring. During the axial compression of the sealing assembly 30, the spring 3 generates compressive deformation to provide the necessary sealing load, and the spring 3 provides sufficient rebound compensation and continuous load under load fluctuation; the C-shaped ring paves the discontinuous load between the springs 3 into a continuous sealing load; the sealing connection is achieved by the sealing portions on both sides of the axial ends of the sealing ring 2 contacting the surface to be sealed. In other embodiments, the metal ring 1 can also be an O-shaped ring, that is, the longitudinal section of the metal ring 1 is O-shaped, and it has a closed hollow cavity.

[0032] The metal ring 1 is preferably made of Inconel 600 alloy, which has the characteristics of temperature resistance and corrosion resistance.

[0033] In this embodiment, the cross-sectional area of ​​the sealing ring gradually decreases along the axial direction away from the metal ring 1. Here, the longitudinal cross-section of the sealing ring 2 forms an inverted triangle shape, and the part embedded in the receiving groove has a large cross-sectional area and volume, so that the graphite material of the sealing ring 2 can be stably held on the outer periphery of the metal ring 1. Here, the receiving groove is an arc-shaped groove that is recessed towards the center along the axial direction of the metal ring 1, and the bottom surface of the sealing ring 2 is an arc-shaped edge 2a, which fits into the groove wall of the arc-shaped groove. The sealing part located outside the receiving groove is mainly used to contact the part to be sealed to achieve a sealing connection.

[0034] Specifically, the sealing part has two inclined extending first side surface 2c and second side surface 2d, which intersect to form a tip 2b, so that when the sealing part mates with the surface to be sealed through the tip 2b, a line contact seal can be formed.

[0035] In this embodiment, the metal ring 1 and the two sealing rings 2 are coaxially arranged, and the two sealing rings 2 overlap each other in the same projection plane. When the sealing assembly 30 is subjected to axial compressive force, the loads on the opposite sides of the sealing assembly 30 along the axial direction are located at the same position in the radial direction of the metal ring 1, which makes the force on both sides of the sealing assembly 30 more balanced. More specifically, along the axial direction of the metal ring 1, the longitudinal section of the metal ring 1 has a center line X extending along the axial direction. As a preferred arrangement, the tips 2b on both axial ends are located on the aforementioned center line X. Furthermore, the longitudinal section of the sealing ring 2 is symmetrically arranged about the center line X.

[0036] See Figure 3The diagram illustrates an application embodiment of the sealing assembly 30 described above. The sealing device includes a first component 10 and a second component 20. The first component 10 has a first sealing surface 102, and the second component 20 has a second sealing surface 201. An annular groove 101 is formed between the first sealing surface 102 and the second sealing surface 201 to accommodate the sealing assembly 30, such that the sealing assembly 30 axially abuts against the first sealing surface 102 and the second sealing surface 201 to form a sealing connection. Here, the annular groove 101 is integrally disposed on the first component 10, and the bottom wall of the annular groove 101 constitutes the first sealing surface 102; the end face of the second component 20 facing the first component 10 constitutes the second sealing surface 201. In this sealing device, the first component 10 and the second component 20 are locked together by an axial locking member such as a locking bolt, so that the sealing assembly 30 is axially compressed to form a sealing connection between the first sealing surface 102 and the second sealing surface 201.

[0037] The sealing assembly 30 is disposed in the annular groove 101. When an axial compressive force is applied to bring the first component 10 and the second component 20 closer together, the metal ring 1 and the spring 3 are deformed axially and provide a sealing load. The tips 2b of the two sealing rings 2 abut against the first sealing surface 102 and the second sealing surface 201 respectively to form a line contact seal, which can significantly reduce the requirement for sealing load. The graphite material of the sealing ring 2 can withstand high temperatures above 800°C and is corrosion-resistant, making it suitable for sealing in high-temperature and corrosive liquid contact environments, avoiding leakage problems caused by sealing assembly failure and the need for frequent replacement of the sealing assembly.

[0038] Example 2

[0039] See Figure 4 , Figure 5 As shown, the sealing component 30 and sealing device provided in this embodiment differ from those in Embodiment 1 mainly in the structure of the sealing ring 2.

[0040] In this embodiment, the cross-section of the sealing ring 2 is arc-shaped, and the center lines of the cross-section of the sealing ring 2 and the cross-section of the metal ring 1 coincide with each other. Alternatively, the cross-section of the metal ring 1 is C-shaped, and the center of the C-shape coincides with the center of the arc shape formed by the cross-section of the sealing ring 2.

[0041] The sealing ring 2 has an inner side 2e and an outer side 2f arranged radially at intervals. Both the inner side 2e and the outer side 2f are arc-shaped and have the same curvature. The inner side 2e fits into the groove wall of the receiving groove, while the outer side 2f is located outside the receiving groove and forms a sealing surface that contacts the surface to be sealed.

[0042] The sealing assembly 30 is used for Figure 5In the sealing device, the outer edges 2f of the two sealing rings 2 respectively abut against the first sealing surface 102 and the second sealing surface 201 to form a surface contact seal.

[0043] In summary, this utility model provides a sealing assembly that is both high-temperature resistant and corrosion-resistant. It achieves this by creating receiving grooves on both axial ends of a metal ring 1, and embedding a graphite sealing ring 2 within these grooves. A portion of the sealing ring 2 is embedded in the receiving groove and integrated with the metal ring 1, while the other portion protrudes axially from the receiving groove, forming the sealing portion of the sealing assembly 30. By combining the metal ring 1 with the graphite sealing ring 2, this sealing assembly can withstand both high temperatures and corrosion, making it suitable for sealing environments involving contact with high-temperature and corrosive liquids. This extends the overall sealing performance and service life of the sealing assembly, avoids leakage problems caused by sealing assembly failure, and reduces the frequency of sealing assembly replacement. This is particularly significant for applications such as nuclear power plants where the cost of replacing seals is high.

[0044] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-temperature resistant and corrosion-resistant sealing assembly, characterized in that: The sealing assembly includes a metal ring with a hollow cavity, and an annular receiving groove is provided on both axial ends of the metal ring. The sealing assembly also includes a sealing ring made of graphite material, a part of which is embedded in the receiving groove, and the other part of which protrudes axially out of the receiving groove and forms the sealing part of the sealing assembly.

2. The high-temperature and corrosion-resistant sealing assembly according to claim 1, characterized in that: The cross-sectional area of ​​the sealing ring gradually decreases along the axial direction away from the metal ring.

3. The high-temperature and corrosion-resistant sealing assembly according to claim 2, characterized in that: The sealing part has two inclined extending first side and second side, the first side and the second side intersect to form a tip, such that when the sealing part mates with the surface to be sealed through the tip, a line contact seal is formed.

4. The high-temperature and corrosion-resistant sealing assembly according to claim 2, characterized in that: The receiving groove is an arc-shaped groove that is recessed towards the center along the axial direction of the metal ring.

5. The high-temperature and corrosion-resistant sealing assembly according to claim 1, characterized in that: The sealing ring has an arc-shaped cross-section, and the center line of the sealing ring coincides with the center line of the cross-section of the metal ring.

6. The high-temperature and corrosion-resistant sealing assembly according to claim 5, characterized in that: The sealing ring has an inner side and an outer side that are radially spaced apart. The inner side fits into the wall of the receiving groove, and the outer side is located outside the receiving groove and forms a sealing surface that contacts the surface to be sealed.

7. The high-temperature and corrosion-resistant sealing assembly according to any one of claims 1 to 6, characterized in that: The metal ring is coaxially arranged with the two sealing rings, and the two sealing rings overlap each other in the same projection plane.

8. The high-temperature and corrosion-resistant sealing assembly according to claim 7, characterized in that: The metal ring is a C-shaped ring, and the sealing assembly also includes an annular spring disposed in the C-shaped ring.

9. The high-temperature and corrosion-resistant sealing assembly according to claim 7, characterized in that: The metal ring is an O-ring with an O-shaped cross-section.

10. The high-temperature and corrosion-resistant sealing assembly according to claim 7, characterized in that: The metal ring is made of Inconel 600 alloy.

Images