Polytetrafluoroethylene sealing ring

Abstract

The utility model discloses a polytetrafluoroethylene sealing ring, which comprises a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring and the third sealing ring are respectively embedded with the outer wall and the inner wall of the second sealing ring, and a plurality of buffer grooves are annularly arranged on the outer side of the second sealing ring. And a plurality of glue injection holes are formed in the inner wall of each buffer groove. According to the technical scheme, compression resistance and durability of the sealing element are improved, and long-term stable operation of the sealing element under complex working conditions such as high pressure and vibration is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of polytetrafluoroethylene (PTFE) sealing ring technology, and in particular to a polytetrafluoroethylene (PTFE) sealing ring. Background Technology

[0002] The choice of sealing ring material is crucial to its sealing performance and service life. The physical properties of the material directly determine the performance of the sealing ring during operation, especially within a specific working pressure and temperature range. It should have excellent sealing effect, and its sealing performance should automatically improve with increasing pressure.

[0003] However, current sealing rings are generally made of a single material. This design limitation makes it difficult for them to maintain long-term stable operation under complex working conditions such as high pressure and vibration. Utility Model Content

[0004] The main purpose of this invention is to provide a polytetrafluoroethylene sealing ring, which aims to improve the pressure resistance and durability of sealing elements and ensure their long-term stable operation under complex working conditions such as high pressure and vibration.

[0005] To achieve the above objectives, this utility model proposes a polytetrafluoroethylene sealing ring, comprising:

[0006] The first sealing ring, the second sealing ring, and the third sealing ring are respectively fitted into the outer wall and the inner wall of the second sealing ring. The outer side of the second sealing ring is provided with several buffer grooves, and the inner wall of each buffer groove is provided with several glue injection holes.

[0007] In one possible implementation, the inner wall of the second sealing ring is provided with an interlocking groove, and the inner wall of the interlocking groove is provided with a plurality of inclined surfaces, each of which has an inner diameter that gradually decreases toward the axis of the second sealing ring, and the outer wall of the third sealing ring is fitted with the inner wall of the interlocking groove.

[0008] In one possible implementation, a plurality of locking grooves are provided at the minimum inner diameter of the second sealing ring, and a locking strip is fixedly connected to the outer ring of the third sealing ring. Each locking strip is engaged in the locking groove to further improve the connection strength between the second sealing ring and the third sealing ring.

[0009] In one possible implementation, the inner wall of the third sealing ring is fixedly connected with several protrusions.

[0010] In one possible implementation, the inner wall of the third sealing ring is provided with a plurality of ribs arranged in a ring around its own axis.

[0011] In one possible implementation, the first sealing ring is a metal layer, the second sealing ring is a polytetrafluoroethylene layer, and the third sealing ring is a rubber layer.

[0012] In one possible implementation, the outer diameter of the third sealing ring is slightly larger than the inner diameter of the second sealing ring.

[0013] This utility model's technical solution enhances the force dispersion effect through the interlocking structure of the first, second, and third sealing rings, avoiding excessive local stress on a single-material sealing ring. The buffer groove design allows the second sealing ring to share the force through support and local tension, improving its support strength and preventing deformation or failure. Simultaneously, the addition of the glue injection hole further strengthens the connection between the first and second sealing rings. The solid column formed after the glue solidifies enhances the connection's firmness, providing additional support and stability. The overall design improves the sealing element's pressure resistance and durability, ensuring long-term stable operation under complex conditions such as high pressure and vibration. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a polytetrafluoroethylene sealing ring according to the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram illustrating the mating of the second and third sealing rings in a polytetrafluoroethylene (PTFE) sealing ring according to this utility model. Figure 2 ;

[0017] Figure 3 This is a schematic diagram showing the cross-section of the second sealing ring in a polytetrafluoroethylene sealing ring according to the present invention;

[0018] Figure 4 for Figure 3 Enlarged diagram of A in the middle;

[0019] Figure 5 This is a schematic diagram of an explosion of a polytetrafluoroethylene sealing ring according to the present invention.

[0020] Explanation of icon numbers:

[0021] 11. First sealing ring; 12. Second sealing ring; 13. Third sealing ring; 14. Buffer groove; 15. Glue injection hole; 21. Fitting groove; 22. Inclined surface; 23. Locking groove; 24. Locking strip; 25. Protrusion; 26. Rib.

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] This utility model proposes a polytetrafluoroethylene sealing ring.

[0025] Reference Figures 1 to 5 ,include:

[0026] The first sealing ring 11, the second sealing ring 12 and the third sealing ring 13 are respectively fitted into the outer wall and the inner wall of the second sealing ring 12. The outer side of the second sealing ring 12 is provided with a number of buffer grooves 14, and the inner wall of each buffer groove 14 is provided with a number of glue injection holes 15.

[0027] By interlocking the first sealing ring 11, the second sealing ring 12, and the third sealing ring 13, this multi-layer interlocking structure can effectively increase the force distribution effect compared to a single-material sealing ring. When subjected to compressive force, the force is transmitted through the buffer groove 14, allowing the force on the second sealing ring 12 to be shared by its own support and the local tensile effect of the buffer groove 14, thereby improving the support strength of the second sealing ring 12 and avoiding excessive local deformation or failure. In addition, the setting of the glue injection hole 15 further enhances the connection between the first sealing ring 11 and the second sealing ring 12. When the two are tightly interlocked, glue can be injected into their contact area through the glue injection hole 15 to form a strong connection. After the adhesive solidifies in the injection hole 15, it forms solid columns. These solidified adhesive columns are in close contact with the inner wall of the injection hole 15, further strengthening the connection between the first sealing ring 11 and the second sealing ring 12. The solidification of the adhesive provides additional support and stability, making the connection between the two more secure and effectively improving the pressure resistance and durability of the overall sealing element. Through the above design, external forces can be better distributed, reducing the risk of uneven stress and ensuring the long-term stable operation of the sealing element under complex working conditions such as high pressure and vibration.

[0028] Reference Figures 1 to 5 The inner wall of the second sealing ring 12 is provided with a fitting groove 21, and a number of inclined surfaces 22 are provided on the inner wall of the fitting groove 21. The inner diameter of each inclined surface 22 gradually decreases in the direction of the axis of the second sealing ring 12. The outer wall of the third sealing ring 13 fits into the shape of the inner wall of the fitting groove 21.

[0029] When the second sealing ring 12 is subjected to compressive force, the force is transmitted to the third sealing ring 13, causing the third sealing ring 13 to bend and deform in the deeper areas of the mating groove 21 on its upper and lower sides. Through the design of the inclined surface 22, the contact position between the third sealing ring 13 and the inclined surface 22 can effectively guide the transmitted force back to the inclined surface 22, thereby dispersing and redistributing the force. The fit between the second sealing ring 12 and the third sealing ring 13 is tighter, enabling them to share the external force, thus significantly improving the strength of the overall sealing element. This effectively enhances the sealing element's load-bearing capacity under high pressure or compressive conditions, avoids failure or deformation due to excessive local stress, improves the reliability and durability of the overall sealing system, and ensures its stable performance in various working environments.

[0030] Reference Figures 3 to 4 The second sealing ring 12 has several locking grooves 23 at its smallest inner diameter. The outer ring of the third sealing ring 13 is fixedly connected with locking strips 24. Each locking strip 24 is locked in the locking groove 23 to further improve the connection strength between the second sealing ring 12 and the third sealing ring 13.

[0031] Through the snap-fit ​​design of the snap-fit ​​strip 24 and the snap-fit ​​groove 23, the connection between the second sealing ring 12 and the third sealing ring 13 is significantly strengthened. This not only increases the contact area between the two, but also, through the structure of the snap-fit ​​groove 23 gradually decreasing in size towards the outer wall of the third sealing ring 13, makes the connection between the second sealing ring 12 and the third sealing ring 13 tighter. When the two are snapped into the snap-fit ​​groove 23 by the snap-fit ​​strip 24, it can effectively avoid sealing failure caused by uneven force or loose connection, thereby improving the stability and reliability of the overall sealing system. In addition, the snap-fit ​​structure allows the third sealing ring 13 to fully share the compressive force on the second sealing ring 12. The force is evenly distributed through the tight connection between the two, thereby reducing the burden on a single part and effectively improving the strength of the overall sealing element. This enables it to maintain sealing performance under high pressure, high temperature or other extreme conditions, further enhancing the durability and load-bearing capacity of the sealing system.

[0032] Reference Figures 1 to 5 The inner wall of the third sealing ring 13 is fixedly connected with several protrusions 25;

[0033] These protrusions 25 serve as local support points, effectively enhancing the local support strength of the inner wall of the third sealing ring 13. When subjected to compressive force, the force is transmitted along the inner wall of the third sealing ring 13 to the protrusions 25. Through its unique structure, the protrusions 25 disperse the external force, thereby avoiding excessive concentrated pressure on a specific area. This allows the third sealing ring 13 to bear external pressure more evenly, enhancing its overall support strength and compressive strength, and improving the reliability and durability of the sealing element under high pressure or high temperature environments. At the same time, the presence of the protrusions 25 also effectively reduces the risk of deformation of the third sealing ring 13 during the extrusion process, ensuring that it can maintain excellent sealing performance even after long-term operation.

[0034] Reference Figures 1 to 5 The inner wall of the third sealing ring 13 is provided with several ribs 26 arranged in a ring around its own axis;

[0035] The ribs 26 effectively increase the structural strength of the third sealing ring 13. Especially when subjected to axial force, the ribs 26 can provide additional support to prevent the third sealing ring 13 from deforming or being damaged. Moreover, the third sealing ring 13 can maintain its stability and sealing effect when facing higher axial pressure, which enhances the overall pressure resistance of the sealing system. This not only improves the load-bearing capacity of the third sealing ring 13, but also enables it to work stably for a long time under high pressure, avoiding sealing failure due to excessive deformation or failure, thereby significantly improving the reliability and service life of the sealing element.

[0036] Reference Figures 1 to 5 The first sealing ring 11 is a metal layer, the second sealing ring 12 is a polytetrafluoroethylene layer, and the third sealing ring 13 is a rubber layer;

[0037] The first sealing ring 11 of the metal layer provides excellent mechanical strength and high-temperature resistance, effectively supporting the second sealing ring 12 and thus enhancing its relative strength. This allows it to maintain stable sealing performance under high pressure or high temperature conditions. The second sealing ring 12 of the PTFE layer possesses excellent chemical stability and corrosion resistance, resisting the erosion of various chemical media, and has a low coefficient of friction, thereby enhancing the sealing effect. The third sealing ring 13 of the rubber layer provides elasticity and plasticity, flexibly adapting to changes in the sealing surface under axial pressure and radial deformation, improving the tightness of the seal. Through the mutual cooperation and support of these three layers, the sealing element enhances its overall support strength while ensuring the chemical stability and low friction of the PTFE layer, effectively maintaining sealing performance under extreme conditions. Furthermore, the third sealing ring 13 of the rubber layer further improves the contact effect between the sealing element and the sealing position, enabling the sealing element to better cope with axial pressure and radial deformation, thereby improving the stability and reliability of the sealing system and extending its service life.

[0038] Reference Figures 1 to 5 The outer diameter of the third sealing ring 13 is slightly larger than the inner diameter of the second sealing ring 12.

[0039] The outer diameter of the third sealing ring 13 is slightly larger than the inner diameter of the second sealing ring 12. When the third sealing ring 13 is fitted into the inner wall fitting groove 21 of the second sealing ring 12, the fit between the two is more secure due to the larger outer diameter of the third sealing ring 13, which enhances the stability of the seal. At the same time, when the second sealing ring 12 is subjected to external compression, the third sealing ring 13 can provide effective support and enhance the axial strength of the second sealing ring 12. This not only improves the pressure resistance of the sealing structure but also improves the durability of the sealing element. Especially under high load conditions, it can effectively reduce the risk of deformation or damage to the second sealing ring 12 due to axial pressure, thus extending the service life of the seal.

[0040] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A polytetrafluoroethylene sealing ring, characterized in that, include: The first sealing ring (11), the second sealing ring (12), and the third sealing ring (13) are respectively fitted to the outer wall and the inner wall of the second sealing ring (12). The outer side of the second sealing ring (12) is provided with several buffer grooves (14), and the inner wall of each buffer groove (14) is provided with several glue injection holes (15).

2. The polytetrafluoroethylene sealing ring according to claim 1, characterized in that, The inner wall of the second sealing ring (12) is provided with a fitting groove (21) in an annular shape. The inner wall of the fitting groove (21) is provided with a plurality of inclined surfaces (22). The inner diameter of each inclined surface (22) gradually decreases in the direction of the axis of the second sealing ring (12). The outer wall of the third sealing ring (13) fits into the shape of the inner wall of the fitting groove (21).

3. The polytetrafluoroethylene sealing ring according to claim 2, characterized in that, The second sealing ring (12) has several locking grooves (23) at its smallest inner diameter. The outer ring of the third sealing ring (13) is fixedly connected with locking strips (24). Each locking strip (24) is locked in the locking groove (23) to further improve the connection strength between the second sealing ring (12) and the third sealing ring (13).

4. The polytetrafluoroethylene sealing ring according to claim 2, characterized in that, The inner wall of the third sealing ring (13) is fixedly connected with several protrusions (25).

5. The polytetrafluoroethylene sealing ring according to claim 2, characterized in that, The inner wall of the third sealing ring (13) is provided with several ribs (26) arranged in a ring around its own axis.

6. The polytetrafluoroethylene sealing ring according to claim 1, characterized in that, The first sealing ring (11) is a metal layer, the second sealing ring (12) is a polytetrafluoroethylene layer, and the third sealing ring (13) is a rubber layer.

7. The polytetrafluoroethylene sealing ring according to claim 1, characterized in that, The outer diameter of the third sealing ring (13) is slightly larger than the inner diameter of the second sealing ring (12).

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