High temperature resistant sealing ring

Abstract

This utility model belongs to the field of sealing ring technology, and particularly relates to a high-temperature resistant sealing ring; it includes: a sealing ring body; an elastic sleeve fitted on the outside of the sealing ring body; a heat insulation ring disposed inside the elastic sleeve and located on the front and rear sides of the sealing ring body, used to block the transmission of high temperature to the sealing ring body; and a replacement component disposed on the heat insulation ring and connected to the sealing ring body. This utility model provides a high-temperature resistant sealing ring that can work stably for a long time in high-temperature environments.

Description

Technical Field

[0001] This utility model belongs to the field of sealing ring technology, and particularly relates to high temperature resistant sealing rings. Background Technology

[0002] In many industrial sectors such as petrochemicals, power energy, and aerospace, equipment and pipeline systems often operate in high-temperature environments, thus placing extremely high demands on the performance of high-temperature resistant sealing rings. As a key component ensuring the sealing performance of equipment and pipeline systems, high-temperature resistant sealing rings prevent media leakage and ensure stable and safe system operation.

[0003] Currently, traditional high-temperature resistant sealing rings are mainly made of materials such as rubber and polytetrafluoroethylene (PTFE), which can meet the sealing requirements under high-temperature conditions to a certain extent. However, in actual use, it has been found that when the ambient temperature continues to rise, the molecular structure of these traditional high-temperature resistant sealing rings changes, leading to a significant reduction in their elastic recovery ability. With reduced elastic recovery, the sealing ring, after being deformed under pressure, is difficult to return to its original shape, causing a lack of tight fit between the sealing ring and the pipe wall, resulting in gaps. These gaps become channels for media leakage, leading to leaks in pipeline sections, seriously affecting the overall sealing performance of the pipeline system. This not only wastes media but may also cause safety accidents, resulting in economic losses and safety hazards, and hindering the efficient and stable development of related industrial sectors. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a high-temperature resistant sealing ring that can operate stably for extended periods in high-temperature environments.

[0005] In view of this, the present invention provides a high-temperature resistant sealing ring, comprising:

[0006] Sealing ring body;

[0007] An elastic sleeve is fitted over the outside of the sealing ring body;

[0008] The heat insulation ring is installed inside the elastic sleeve and located on both sides of the front and rear of the sealing ring body to prevent high temperature from being transmitted to the sealing ring body.

[0009] Replace the component, install it on the insulation ring, and connect it to the sealing ring body.

[0010] In the above technical solution, the replacement component further includes multiple locking blocks and locking slots. The multiple locking blocks are evenly spaced along the circumferential direction of the heat insulation ring, and the locking slots are evenly spaced along the circumferential direction of the sealing ring body. The locking blocks and locking slots are adapted to engage.

[0011] In any of the above technical solutions, the number of card blocks and card slots is at least three, and their shape is a rectangular block structure.

[0012] In any of the above technical solutions, the elastic sleeve is further made of a high-temperature resistant elastic material, which is silicone rubber or fluororubber with added heat-resistant additives.

[0013] In any of the above technical solutions, the heat insulation ring is further made of ceramic fiber or aerogel heat insulation material.

[0014] In any of the above technical solutions, the sealing ring body is further made of a composite material with high temperature resistance and high elastic recovery performance.

[0015] The beneficial effects of this utility model are:

[0016] 1. The elastic sleeve continuously provides elastic support to the sealing ring body, and the heat insulation ring blocks the high temperature, ensuring that the elasticity of the sealing ring body does not significantly decrease under high temperature conditions, and always fits tightly with the pipe wall to prevent leakage.

[0017] 2. By using the locking block and the slot to fit together, the sealing ring body, the heat insulation ring, and the elastic sleeve form a stable connection structure, which prevents the sealing ring body from shifting or loosening during use, ensuring the continuous effectiveness of the sealing function, guaranteeing the sealing performance of the pipeline system, and preventing leakage, safety accidents, and economic losses caused by sealing failure; it also allows for quick disassembly and replacement when the sealing ring body ages or is damaged, reducing maintenance costs.

[0018] 3. The heat insulation ring prevents high temperature from directly corroding the sealing ring body, and the elastic sleeve helps maintain elasticity. From the aspects of preventing high temperature damage and maintaining elasticity, the overall service life of the sealing ring is extended, making it suitable for high temperature and complex working conditions such as petrochemical and power industries. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is the first sectional view of this utility model;

[0021] Figure 3 This is a second sectional view of the present invention;

[0022] Figure 4 This is an exploded view of the present invention;

[0023] The attached diagram is labeled as follows: 1. Sealing ring body; 2. Elastic sleeve; 3. Heat insulation ring; 4. Replacement component; 41. Locking block; 42. Locking groove. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] Example 1:

[0027] like Figures 1-4 As shown, this embodiment provides a high-temperature resistant sealing ring, including:

[0028] Sealing ring body 1;

[0029] The elastic sleeve 2 is fitted onto the outside of the sealing ring body 1;

[0030] The heat insulation ring 3 is set inside the elastic sleeve 2 and located on the front and rear sides of the sealing ring body 1 to block the transmission of high temperature to the sealing ring body 1.

[0031] Replace component 4, place it on the heat insulation ring 3, and connect it to the sealing ring body 1.

[0032] In this technical solution, the elastic sleeve 2 continuously provides elastic support for the sealing ring body 1, and the heat insulation ring 3 blocks high temperatures, ensuring that the elasticity of the sealing ring body 1 does not significantly decrease under high-temperature conditions, and it always fits tightly against the pipe wall, preventing leakage. The sealing ring body 1 is reliably fixed to the heat insulation ring 3 and the elastic sleeve 2 by replacing the component 4, preventing loosening during use and allowing for quick disassembly and replacement when the sealing ring body 1 ages or is damaged, reducing maintenance costs. The heat insulation ring 3 blocks the direct corrosion of the sealing ring body 1 by high temperatures, and the elastic sleeve 2 helps maintain elasticity. From the aspects of "preventing high-temperature damage" and "maintaining elastic performance," the overall service life of the sealing ring is extended, making it suitable for high-temperature and complex working conditions in petrochemical, power, and other industries.

[0033] Working principle: The sealing ring consists of four layers: sealing ring body 1 (core sealing element), elastic sleeve 2 (elastic support layer), heat insulation ring 3 (thermal barrier), and replacement component 4 (fixed / removable structure). From the inside out (or functionally related), it forms a coordinated system of "sealing-supporting-heat insulation-fixing".

[0034] The sealing ring body 1 is made of a high-temperature resistant, high-elasticity recovery material, directly contacting the pipe wall to achieve a basic seal. Its material properties determine its sealing ability at normal temperatures, but it is prone to elastic decay at high temperatures, requiring assistance from other components. The elastic sleeve 2 is fitted over the outside of the sealing ring body 1, utilizing its own elasticity to maintain its deformation capacity even at high temperatures. When the sealing ring body 1 shows a tendency to lose elasticity due to high temperatures, the elastic force of the elastic sleeve 2 continuously "presses inward" against the sealing ring body 1, compensating for its elastic decay and forcibly maintaining the contact pressure between the sealing ring body 1 and the pipe wall, ensuring the seal does not fail. The heat insulation ring 3 is arranged inside the elastic sleeve 2, located on both sides (axial direction) of the sealing ring body 1, and is made of low thermal conductivity materials such as ceramic fiber and aerogel. Heat from the high-temperature medium or environment must first pass through the heat insulation ring 3 before being transferred to the sealing ring body 1. The heat insulation ring 3 reduces the efficiency and total amount of heat transfer through "thermal barrier," delaying the molecular structure changes and elasticity decrease of the sealing ring body 1 caused by high temperatures, indirectly ensuring sealing performance. Replacement component 4 connects the insulation ring 3 and the sealing ring body 1. Through a snap-fit, nested, or threaded structure, the sealing ring body 1 can be "locked" within the space formed by the elastic sleeve 2. During installation, replacement component 4 can be used to quickly fix the sealing ring, preventing it from loosening under pipeline vibration or media impact. During replacement, the sealing ring body 1 can be separated by reversing the operation of the component, achieving convenient disassembly and assembly.

[0035] When the piping system is in a high-temperature environment, the high temperature first acts on the outside of the elastic sleeve 2 or the pipe wall. The heat insulation ring 3 actively intercepts the axially transmitted heat, reducing heat penetration to the sealing ring body 1. The high-temperature resistance of the elastic sleeve 2 itself resists the influence of radial heat on the sealing ring body 1. If the sealing ring body 1 experiences a decrease in elasticity due to residual heat, the continuous elastic support force of the elastic sleeve 2 "compensates" for its deformation capacity, forcing the sealing ring body 1 to fit against the pipe wall and preventing gaps. The elasticity of the sealing ring body 1 itself, plus the compensating elasticity of the elastic sleeve 2, jointly maintains the sealing pressure with the pipe wall. The heat insulation ring 3 continuously reduces the damage of heat to the sealing ring body 1, extending its effective elastic period. The three work together to achieve "long-term stable sealing under high temperature". When the sealing ring body 1 ages due to long-term use, the old sealing ring body 1 can be quickly removed and the new part installed by operating the replacement component 4, restoring the sealing performance and simplifying the operation and maintenance process.

[0036] Example 2:

[0037] This embodiment provides a high-temperature resistant sealing ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0038] like Figure 3 and Figure 4 As shown, in this embodiment, the optimized replacement component 4 includes multiple locking blocks 41 and locking slots 42. The multiple locking blocks 41 are evenly spaced along the circumferential direction of the heat insulation ring 3, and the locking slots 42 are evenly spaced along the circumferential direction of the sealing ring body 1. The locking blocks 41 and the locking slots 42 are adapted to engage.

[0039] In this technical solution, under complex operating conditions such as high temperature, high pressure, and pipeline vibration, the locking block 41 and the locking groove 42 fit together to form a stable connection structure between the sealing ring body 1, the heat insulation ring 3, and the elastic sleeve 2. This prevents the sealing ring body 1 from shifting or loosening during use, ensuring the continuous effectiveness of the sealing function, guaranteeing the sealing performance of the pipeline system, and preventing leaks, safety accidents, and economic losses caused by sealing failure. When the sealing ring body 1 needs to be replaced due to aging or decreased elasticity caused by long-term high-temperature use, the detachable locking relationship between the locking block 41 and the locking groove 42 allows for quick separation and replacement of the sealing ring body 1 without complex tools or cumbersome operations, simplifying the maintenance process, reducing equipment downtime, and lowering operation and maintenance costs. The structural design of the locking block 41 and the locking groove 42 ensures a stable connection while preventing significant deformation due to high temperatures, thus adapting to the overall application scenarios of high-temperature resistant sealing rings. This ensures the synergistic effect of all components and helps the sealing ring stably perform its functions of sealing, heat insulation, and elastic support in high-temperature environments.

[0040] Working principle: The locking blocks 41 evenly spaced along the circumference of the heat insulation ring 3 and the corresponding locking grooves 42 distributed along the circumference of the sealing ring body 1 are precisely matched in size and shape. During assembly, the heat insulation ring 3 is first fixed in the installation space formed by the elastic sleeve 2. Then, the sealing ring body 1 is installed between the two heat insulation rings 3, aligning the locking blocks 41 with the locking grooves 42. By applying appropriate external force (such as pressing, rotation, etc., depending on the specific structural design), the locking blocks 41 are inserted into the locking grooves 42, completing the initial connection and fixation of the three, and constructing the overall structure of the sealing ring. When the sealing ring is applied to a high-temperature pipeline system, facing changes in the pressure and temperature of the medium inside the pipeline and pipeline vibration, the mechanical locking structure of the locking blocks 41 and the locking grooves 42 restricts the radial and circumferential displacement of the sealing ring body 1. The elastic sleeve 2 provides elastic support, maintaining the fit between the sealing ring and the pipe wall; the heat insulation ring 3 protects the sealing ring body 1 from high temperatures; and the connection between the locking block 41 and the locking groove 42 allows the components to form a coordinated force-bearing system, ensuring the stability of the sealing ring body 1 even under complex working conditions and continuously performing its sealing function. When the sealing ring body 1 needs to be replaced, the assembly operation is reversed (e.g., applying a reverse force to disengage the locking block 41 from the locking groove 42). Utilizing the detachable connection between the locking block 41 and the locking groove 42, the aged sealing ring body 1 can be separated and removed from the structure composed of the heat insulation ring 3 and the elastic sleeve 2. After replacing the new sealing ring body 1, the locking block 41 and the locking groove 42 are engaged again to quickly restore the complete function of the sealing ring, achieving convenient maintenance.

[0041] like Figure 3 and Figure 4 As shown, in this embodiment, the optimized number of card blocks 41 and card slots 42 is at least three, and their shape is a rectangular block structure.

[0042] In this technical solution, by setting at least three rectangular block-shaped locking blocks 41 and locking grooves 42, the force is evenly distributed through multiple contact points, avoiding local stress concentration that could lead to locking failure. This ensures that the sealing ring body 1 maintains a stable connection with the heat insulation ring 3 and the elastic sleeve 2 under complex working conditions such as high temperature and vibration, preventing sealing failure and leakage caused by loosening of the locking mechanism. The at least three rectangular locking blocks 41 and locking grooves 42 evenly distributed circumferentially ensure that the sealing ring body 1 is subjected to uniform force in the circumferential direction, making the sealing ring body 1 fit more evenly against the pipe wall during operation, improving the overall sealing effect, and preventing premature wear and deformation of the sealing ring body 1 due to uneven local force, thus extending its service life. Compared with complex irregular structures, the rectangular block-shaped locking blocks 41 and locking grooves 42 are easier to process and more precise, facilitating mold manufacturing and mass production. During assembly, the rectangular structure has good guiding and adaptability, enabling quick and accurate locking, reducing production and installation costs, and improving production efficiency.

[0043] Example 3:

[0044] This embodiment provides a high-temperature resistant sealing ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0045] like Figures 1-4 As shown, in this embodiment, the optimized elastic sleeve 2 is made of a high-temperature resistant elastic material, which is silicone rubber or fluororubber with added heat-resistant additives.

[0046] In this technical solution, silicone rubber or fluororubber with added heat-resistant additives is selected as the material for the elastic sleeve 2. This ensures that the elastic sleeve 2 maintains good elasticity in high-temperature environments, continuously providing stable elastic support for the sealing ring body 1. This compensates for the potential elasticity decay of the sealing ring body 1 due to high temperatures, ensuring a tight fit between the sealing ring and the pipe wall and preventing leakage. This type of high-temperature resistant elastic material can operate for extended periods in high-temperature environments without softening or becoming brittle, ensuring that the elastic function of the elastic sleeve 2 is not damaged by high temperatures. This allows the sealing ring to adapt to complex high-temperature operating conditions, expanding its application range. The stable elastic performance of the elastic sleeve 2, combined with components such as the sealing ring body 1 and the heat insulation ring 3, enhances the sealing reliability of the sealing ring at high temperatures, reduces sealing failures caused by the failure of the elastic sleeve 2, ensures stable operation of the pipeline system, and reduces safety hazards and maintenance frequency.

[0047] Working Principle: Silicone rubber and fluororubber inherently possess certain high-temperature resistance properties. Adding heat-resistant additives (such as heat stabilizers and reinforcing agents) further optimizes the stability of their molecular structure. In high-temperature environments, the thermal motion of the material's molecular chains is inhibited by the heat-resistant additives, making them less prone to excessive cross-linking or breakage due to high temperatures. This maintains the material's elastic modulus, tensile strength, and other mechanical properties, allowing the elastic sleeve 2 to maintain its elastic deformation capability. When the sealing ring is installed in the pipeline, the elastic sleeve 2 is fitted over the outside of the sealing ring body 1, relying on its own elasticity to generate radial pressure, applying elastic support force to the sealing ring body 1. Under high-temperature conditions, even if the sealing ring body 1 experiences a decrease in elasticity due to high temperatures, the elastic sleeve 2, due to its material properties, can still maintain good elasticity. The continuously provided radial pressure forces the sealing ring body 1 to fit tightly against the pipe wall, compensating for its elastic decay and maintaining the contact pressure required for sealing. The heat insulation ring 3 prevents high temperatures from being transmitted to the sealing ring body 1, reducing the impact of high temperatures on the elasticity of the sealing ring body 1. Meanwhile, the elastic sleeve 2, with its high-temperature resistant elastic material, assists the sealing ring body 1 in maintaining an elastic seal from a structural mechanics perspective, building upon the heat insulation protection provided by the heat insulation ring 3. The synergistic effect of both components ensures that the sealing ring, under high-temperature conditions, not only reduces damage to the sealing material but also guarantees a stable and reliable seal through elastic compensation, achieving a stable and reliable sealing function.

[0048] like Figures 1-4 As shown, in this embodiment, the optimized heat insulation ring 3 is made of ceramic fiber or aerogel heat insulation material.

[0049] In this technical solution, a heat insulation ring 3 is fabricated using insulating materials with ultra-low thermal conductivity, such as ceramic fiber or aerogel. This creates a highly efficient thermal barrier between the sealing ring and the high-temperature environment, blocking or significantly slowing down heat transfer to the sealing ring body 1. This prevents the sealing ring body 1 from deteriorating in material performance and losing elasticity due to high temperatures. It reduces the direct impact of high temperatures on the sealing ring body 1, minimizing material aging and deformation caused by high temperatures. This fundamentally protects the sealing performance of the sealing ring body 1, extends its effective service life under high-temperature conditions, and reduces replacement frequency and maintenance costs. It ensures that the sealing ring maintains a good sealing condition in high-temperature environments, preventing media leakage due to decreased sealing ring elasticity or seal failure. This guarantees the safe and stable operation of high-temperature pipeline systems in petrochemical, power, and other industries, avoiding safety accidents and economic losses caused by leaks.

[0050] Working principle: Ceramic fibers are composed of crystalline and glassy phases, and contain a large number of tiny pores filled with still air. Air is a poor conductor of heat, effectively hindering heat conduction; at the same time, the thermal conductivity of ceramic fibers is extremely low. When high temperature is applied to the heat insulation ring 3, heat conduction within the ceramic fibers is slow, making it difficult to quickly penetrate the heat insulation ring 3 and transfer to the sealing ring body 1.

[0051] Aerogel is a lightweight, nanoporous, amorphous solid material with a nanoporous network structure and gas filling the pores, exhibiting a porosity as high as 80%-99.8%. This unique nanoporous structure greatly restricts the thermal motion of gas molecules, reducing heat conduction; simultaneously, its nanoscale pore structure scatters and absorbs thermal radiation, significantly weakening the transfer of heat in the form of radiation, thereby effectively blocking the transfer of high temperature to the sealing ring body 1.

[0052] When high-temperature media or ambient heat acts on the high-temperature resistant sealing ring, it first contacts the heat insulation ring 3. Due to the low thermal conductivity of ceramic fiber or aerogel insulation materials, heat must undergo a long and inefficient conduction process to pass through the heat insulation ring 3. During this process, most of the heat is blocked on the outside of the heat insulation ring 3, and only a very small portion of the heat can penetrate to the sealing ring body 1, significantly reducing the impact of high temperature on the sealing ring body 1 and maintaining its performance stability. The heat insulation ring 3 works in conjunction with the elastic sleeve 2 and the sealing ring body 1. The elastic sleeve 2 compensates for the elastic decay of the sealing ring body 1 at high temperatures from a mechanical perspective, while the heat insulation ring 3 reduces the damage to the material properties of the sealing ring body 1 from a thermal protection perspective. The two complement each other to jointly ensure the sealing effect and service life of the sealing ring in high-temperature environments.

[0053] like Figures 1-4 As shown, in this embodiment, the optimized sealing ring body 1 is made of a composite material with high temperature resistance and high elastic recovery performance.

[0054] In this technical solution, a composite material is made by adding elastic reinforcing agents and heat-resistant stabilizers to polytetrafluoroethylene (PTFE). This gives the sealing ring body 1 high-temperature resistance and high elastic recovery properties, allowing it to maintain good elasticity even in high-temperature environments. This ensures a tight fit with the pipe wall, effectively preventing media leakage and improving the sealing reliability of the pipeline system. The heat-resistant stabilizer inhibits high-temperature damage to the material and slows down the aging process. Combined with the elastic reinforcing agent, it maintains elasticity and reduces problems such as decreased elasticity and deformation of the sealing ring body 1 caused by high temperatures. This extends the service life of the sealing ring under high-temperature conditions and reduces replacement frequency and maintenance costs. The characteristics of this composite material enable the sealing ring body 1 to adapt to the high-temperature and complex working environments in industries such as petrochemicals and power energy, meeting the stringent sealing performance requirements of different high-temperature conditions and expanding the application range of high-temperature resistant sealing rings.

[0055] Working principle: Polytetrafluoroethylene itself has excellent chemical stability, corrosion resistance and high temperature resistance. It can maintain structural stability in high temperature environment and is not easy to react chemically with the medium or be corroded, thus providing the sealing ring body 1 with basic high temperature resistance.

[0056] The added elastic reinforcing agent can improve the relatively poor elastic properties of polytetrafluoroethylene (PTFE) by changing the molecular structure and arrangement within the material, thereby enhancing the flexibility and elastic recovery ability of the molecular chains. After the sealing ring body 1 is deformed by compression, the elastic reinforcing agent promotes the rapid recovery of the molecular chains to their initial state, thus improving the elastic recovery performance of the sealing ring body 1 and enabling it to rebound quickly even at high temperatures, maintaining tight contact with the pipe wall.

[0057] Heat stabilizers can capture free radicals generated by the thermal motion of material molecules at high temperatures, preventing oxidation and breakage of molecular chains and stabilizing the molecular structure of the material. In high-temperature environments, the heat stabilizer continues to function, inhibiting the thermal degradation and aging process of the material, ensuring that the various performance indicators of the sealing ring body 1 do not significantly decrease due to high temperatures.

[0058] When the sealing ring body 1 is in a high-temperature environment, polytetrafluoroethylene (PTFE) resists high-temperature corrosion due to its inherent high-temperature resistance; the elastic reinforcing agent continuously ensures the elastic recovery ability of the molecular chains, enabling the sealing ring body 1 to quickly recover its elastic deformation even under conditions of intensified molecular thermal motion caused by high temperatures; the heat-resistant stabilizer continuously neutralizes free radicals, preventing the material from aging and becoming brittle due to high-temperature oxidation. These three components work synergistically to maintain good elastic recovery ability of the sealing ring body 1 at high temperatures, ensuring a good seal with the pipe wall. In the pipeline system, the sealing ring body 1, relying on the high elastic recovery performance of the composite material, can fit tightly against the pipe wall during installation; during operation, even if it deforms to a certain extent due to changes in medium pressure, temperature, and pipeline vibration, it can quickly rebound, maintaining close contact with the pipe wall to form a reliable sealing barrier, effectively preventing medium leakage and ensuring the stable operation of the pipeline system.

[0059] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A high-temperature resistant sealing ring, characterized in that, include: Sealing ring body (1); An elastic sleeve (2) is fitted onto the outside of the sealing ring body (1); The heat insulation ring (3) is disposed inside the elastic sleeve (2) and located on the front and rear sides of the sealing ring body (1) to block the transmission of high temperature to the sealing ring body (1); Replace component (4), set on the heat insulation ring (3), and connect it to the sealing ring body (1).

2. The high-temperature resistant sealing ring according to claim 1, characterized in that, The replacement component (4) includes multiple locking blocks (41) and locking slots (42). The multiple locking blocks (41) are evenly spaced along the circumferential direction of the heat insulation ring (3), and the locking slots (42) are evenly spaced along the circumferential direction of the sealing ring body (1). The locking blocks (41) and locking slots (42) are adapted to engage.

3. The high-temperature resistant sealing ring according to claim 2, characterized in that, The number of each card block (41) and card slot (42) is at least three, and the shape is a rectangular block structure.

4. The high-temperature resistant sealing ring according to claim 1, characterized in that, The elastic sleeve (2) is made of a high-temperature resistant elastic material, which is silicone rubber or fluororubber with added heat-resistant additives.

5. The high-temperature resistant sealing ring according to claim 1, characterized in that, The heat insulation ring (3) is made of ceramic fiber or aerogel heat insulation material.

6. The high-temperature resistant sealing ring according to claim 1, characterized in that, The sealing ring body (1) is made of a composite material with high temperature resistance and high elastic recovery performance.

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