High-temperature anti-sticking exhaust pipe sealing ring

Abstract

The utility model relates to the technical field of sealing rings, in particular to a high-temperature anti-sticking exhaust pipe sealing ring which adopts the following technical scheme that the high-temperature anti-sticking exhaust pipe sealing ring comprises a center ring structure, the surface of the center ring structure is coated with a protective coating, the center ring structure comprises an outer side ring, an inner side ring and two V-shaped rings, and the inner side ring is provided with a protective coating; the outer side ring is arranged outside the inner side ring in a sleeving mode, and the two sides of the outer side ring are connected with the inner side ring through the V-shaped rings respectively. When air flow in the exhaust pipe flows, air pressure acts on the sealing side ring, the air pressure pushes the conical surface of the V-shaped ring through the sealing side ring, the two ends of the V-shaped ring push the outer side ring and the inner side ring towards the two sides, and the outer side ring and the inner side ring are attached to the inner wall of the exhaust pipe and the surface of a gas conveying pipeline more tightly; therefore, the sealing effect of the sealing ring can be improved through the air pressure effect of airflow, and the anti-sticking effect of the sealing ring is improved in cooperation with the protective coating.

Description

Technical Field

[0001] This application relates to the field of sealing ring technology, and in particular to a high-temperature anti-sticking exhaust pipe sealing ring. Background Technology

[0002] In modern industry and transportation, the sealing performance of exhaust systems plays a decisive role in equipment energy efficiency, environmental emissions, and operational safety. Exhaust pipe sealing rings, as an indispensable core sealing component in exhaust systems, fill gaps at pipe interfaces, achieving multiple functions such as preventing exhaust gas leakage, buffering mechanical vibration, and compensating for thermal deformation. Their performance directly affects the overall system's operational quality and they are widely used in critical equipment such as automotive engines, industrial boilers, and marine power plants. However, the complex and harsh working environment of exhaust systems places extremely high demands on the performance of exhaust pipe sealing rings. During actual operation, high-temperature exhaust gas is continuously discharged from the exhaust pipe. This continuous high temperature causes traditional sealing materials to easily undergo thermal degradation, damaging their molecular structure, gradually hardening and becoming brittle, losing elasticity, and ultimately failing to tightly seal the pipe interface, leading to seal failure. Simultaneously, the periodic pulsed gas pressure generated during exhaust causes high-frequency vibration of the sealing ring. Under repeated stress, the sealing surface is prone to fatigue wear, forming microcracks. These cracks expand over time, severely affecting the sealing effect. In addition, the alternating hot and cold temperatures during equipment operation and shutdown will generate significant thermal stress at the interface between the sealing ring and the pipe, causing gaps between the sealing ring and the pipe and resulting in exhaust gas leakage.

[0003] From a material properties perspective, while existing metal sealing rings possess a certain level of strength and high-temperature resistance, they are prone to creep deformation under high-temperature and high-pressure environments, altering their original shape and dimensions and reducing sealing performance. Non-metallic sealing rings, on the other hand, are prone to carbonization at high temperatures and have weak resistance to chemical corrosion, making them unable to operate stably for extended periods in exhaust gas environments containing complex chemical components. These problems severely restrict the reliability and service life of exhaust systems, making existing exhaust pipe sealing rings unable to meet the growing demands for high efficiency and stable operation in modern industry and transportation. Therefore, the development of new sealing technologies that combine high-temperature stability, dynamic sealing adaptability, and long-term service performance is urgently needed. Utility Model Content

[0004] To overcome the technical defects of the existing technology, this utility model provides a high-temperature anti-sticking exhaust pipe sealing ring.

[0005] The technical solution adopted by this utility model is: including a central ring structure, the surface of which is coated with a protective coating, the central ring structure including an outer ring, an inner ring and two V-shaped rings, the outer ring being sleeved outside the inner ring, and the two sides of the outer ring being connected to the inner ring through the V-shaped rings respectively;

[0006] A sealing side ring is installed on the side of the central ring structure, and the sealing side ring connects the outer ring and the inner ring, and is sleeved on the V-shaped ring.

[0007] Optionally, the protective coating is an aluminum titanium nitride coating and / or an aluminum chromium nitride coating and / or an aluminum titanium nitride coating.

[0008] Optionally, the central ring structure further includes a fixing protrusion disposed on the side of the outer ring away from the inner ring.

[0009] Optionally, the fixing protrusion is provided with a slot.

[0010] Optionally, the top and bottom of the sealing side ring are provided with multiple annular grooves spaced apart.

[0011] Optionally, a buffer cavity is formed between the outer ring, the inner ring, and the two V-shaped rings, and a core ring is provided inside the buffer cavity, with a through hole on the core ring.

[0012] Optionally, both sides of the outer ring and the inner ring are provided with annular assembly grooves, and positioning protrusions are provided in the annular assembly grooves. Two annular connecting blocks are provided at intervals on the side of the sealing side ring facing the central ring structure. Positioning grooves are provided on the annular connecting blocks. The annular connecting blocks are inserted into the annular assembly grooves, and the positioning grooves are fitted onto the positioning protrusions.

[0013] Optionally, both sides of the V-shaped ring are connected to the outer ring and the inner ring respectively via annular flanges.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a high-temperature anti-sticking exhaust pipe sealing ring. By setting a V-shaped ring between the outer ring and the inner ring, when the airflow inside the exhaust pipe flows, the air pressure acts on the sealing side ring. The air pressure pushes the conical surface of the V-shaped ring through the sealing side ring, causing the two ends of the V-shaped ring to push the outer ring and the inner ring to both sides, making the outer ring and the inner ring fit more tightly with the inner wall of the exhaust pipe and the surface of the gas transmission pipeline. Thus, the sealing effect of the sealing ring can be improved by utilizing the air pressure of the airflow, and the protective coating further enhances the anti-sticking effect of the sealing ring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the overall heart ring structure in the embodiments of this application;

[0017] Figure 3 This is a partial schematic diagram of the central ring structure in an embodiment of this application;

[0018] Figure 4 This is a partial structural schematic diagram of the high-temperature anti-sticking exhaust pipe sealing ring in an embodiment of this application;

[0019] Figure 5 This is a schematic diagram of a structure in which a heart ring is provided inside the central ring structure in this application embodiment.

[0020] Explanation of reference numerals in the attached figures: 1. Central ring structure; 11. Outer ring; 12. Inner ring; 13. V-shaped ring; 14. Fixing protrusion; 111. Slot; 112. Annular assembly groove; 131. Annular flange; 2. Sealing side ring; 21. Annular groove; 22. Annular connecting block; 221. Positioning groove; 3. Core ring; 31. Through hole; 4. Positioning protrusion. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] As shown in the figure, this embodiment provides a high-temperature anti-sticking exhaust pipe sealing ring, including: a central ring structure 1, the surface of which is coated with a protective coating, the central ring structure 1 including an outer ring 11, an inner ring 12 and two V-shaped rings 13, the outer ring 11 being sleeved outside the inner ring 12, and the two sides of the outer ring 11 being connected to the inner ring 12 through the V-shaped rings 13 respectively;

[0023] A sealing side ring 2 is installed on the side of the central ring structure 1, and the sealing side ring 2 connects the outer ring 11 and the inner ring 12, and is sleeved on the V-shaped ring 13.

[0024] When the high-temperature anti-stick exhaust pipe sealing ring is installed, it is located between the exhaust pipe and the connected gas transmission pipe. The outer side of the outer ring 11 and the outer side of the sealing ring 2 are attached to the inner wall of the exhaust pipe, and the inner side of the inner ring 12 and the inner side of the sealing ring 2 are attached to the gas transmission pipe connected to the exhaust pipe.

[0025] By setting a V-shaped ring 13 between the outer ring 11 and the inner ring 12, when the airflow inside the exhaust pipe flows, the air pressure acts on the sealing side ring 2. The air pressure pushes the conical surface of the V-shaped ring 13 through the sealing side ring 2, causing the two ends of the V-shaped ring to push the outer ring 11 and the inner ring 12 to both sides, making the outer ring 11 and the inner ring 12 fit more tightly with the inner wall of the exhaust pipe and the surface of the gas transmission pipe. Thus, the sealing effect of the sealing ring can be improved by utilizing the air pressure of the airflow.

[0026] Since the adhesion of the sealing ring is mainly caused by deformation of the sealing ring due to high temperature, the anti-adhesion effect of the sealing ring can be improved by setting a protective coating to enhance the high temperature resistance and wear resistance of the central ring structure.

[0027] The sealing side ring 2 can also be coated with a protective coating.

[0028] In this embodiment, the central ring structure 1 is made of metal, such as stainless steel or alloy, or rubber, etc.

[0029] The sealing side ring 2 is made of high-temperature resistant rubber.

[0030] As an optional embodiment, the protective coating is an aluminum titanium nitride coating and / or an aluminum chromium nitride coating and / or an aluminum titanium nitride coating.

[0031] Among them, the aluminum titanium nitride coating has high hardness, high wear resistance and good high temperature resistance, which can improve the wear resistance between the sealing ring and the inner wall of the exhaust pipe, reduce friction and wear, and help prevent sticking.

[0032] Chromium nitride aluminum coating: It has excellent anti-oxidation, anti-corrosion and high temperature resistance, which improves the service life of the sealing ring.

[0033] Titanium nitride coating: Applied to the outside of the chromium aluminum nitride coating, it has good hardness, wear resistance and corrosion resistance, which can further enhance the surface properties of the sealing ring and improve its anti-adhesion, wear resistance and corrosion resistance;

[0034] In this embodiment, the protective coating can be one or two of the following: aluminum titanium nitride coating, chromium aluminum nitride coating, and titanium nitride coating, or a combination of all three, so that the effects of different coatings can be taken into account at the same time.

[0035] For example, the aluminum titanium nitride coating is set on the inner wall of the inner ring 12, the chromium aluminum nitride coating is set on the outer wall of the outer ring 11, and the titanium nitride coating is set on the outer side of the chromium aluminum nitride coating.

[0036] Please see Figure 1 and Figure 2As an optional embodiment, the central ring structure 1 further includes a fixing protrusion 14, which is disposed on the side of the outer ring 11 away from the inner ring 12.

[0037] An annular groove is provided inside the exhaust pipe. When the sealing ring is connected to the exhaust pipe, the fixed protrusion 14 is assembled with the annular groove, and the outer ring 11 and the sealing side ring 2, which are exposed outside the fixed protrusion 14, are in contact with the inner wall of the exhaust pipe.

[0038] Please see Figure 1 The fixed protrusion 14 is provided with a slot 111.

[0039] Correspondingly, a locking block is provided inside the annular groove inside the exhaust pipe. The locking block is embedded in the locking groove 111 to limit the axial movement of the sealing ring.

[0040] Please see Figure 4 As a preferred embodiment, the top and bottom of the sealing side ring 2 are provided with a plurality of annular grooves 21 spaced apart.

[0041] By setting multiple annular grooves 21, the outer and inner surfaces of the sealing side ring 2 are made to fit in multiple segments with the exhaust pipe and gas transmission pipe, reducing the contact area and friction. At the same time, the sealing side ring 2 has better deformability. When the airflow interacts with it, the force of the airflow is buffered, reducing the vibration caused by the airflow.

[0042] Please see Figure 5 In a preferred embodiment, a buffer cavity is formed between the outer ring 11, the inner ring 12 and the two V-shaped rings 13, and a core ring 3 is provided inside the buffer cavity, with a through hole 31 on the core ring 3.

[0043] By setting the core ring 3, the overall stability of the central ring structure 1 is improved. The core ring 3 is made of high-temperature resistant rubber material, and by opening several through holes, it has a better deformation effect.

[0044] Please see Figure 5 In a preferred embodiment, both sides of the outer ring 11 and the inner ring 12 are provided with annular assembly grooves 112. The annular assembly grooves 112 are provided with positioning protrusions 4. The sealing side ring 2 is provided with two annular connecting blocks 22 at intervals on the side facing the central ring structure 1. The annular connecting blocks 22 are provided with positioning grooves 221. The annular connecting blocks 22 are inserted into the annular assembly grooves 112, and the positioning grooves 221 are sleeved on the positioning protrusions 4.

[0045] The annular connecting block 22 and the sealing side ring 2 are made of the same material. In this embodiment, the sealing side ring 2 is made of high-temperature resistant rubber.

[0046] Since the sealing side ring 2 is made of high-temperature resistant rubber and uses a central ring structure 1 made of a material with a lower authorization than metal, when the sealing side ring 2 becomes worn and unusable, the sealing side ring 2 can be directly removed from the central ring structure 1 because the annular connecting block 2 has deformability.

[0047] Then a new sealing side ring 2 can be installed. During installation, the annular connecting block 22 is inserted into the annular assembly groove 112, and the positioning groove 221 is fitted onto the positioning protrusion 4. The positioning protrusion 4 cooperates with the positioning groove 221 to limit the sealing side ring 2.

[0048] Please see Figure 4 In a preferred embodiment, both sides of the V-shaped ring 13 are connected to the outer ring 11 and the inner ring 12 respectively via annular flanges 131.

[0049] The interaction area between the V-shaped ring 13 and the outer ring 1211 and the inner ring 12 is increased by setting an annular flange 131.

[0050] Please see Figure 1 As a preferred embodiment, there are two sealing side rings 2, located on both sides of the central ring structure 1.

[0051] The sealing effect is improved by setting sealing side rings 2 on both sides.

[0052] The implementation principle of a high-temperature anti-sticking exhaust pipe sealing ring in this application embodiment is as follows: When the high-temperature anti-sticking exhaust pipe sealing ring is installed, it is located between the exhaust pipe and the connected gas transmission pipeline, wherein the outer side ring 11 and the outer side ring 2 are attached to the inner wall of the exhaust pipe, and the inner side ring 12 and the inner side ring 2 are attached to the gas transmission pipeline connected to the exhaust pipe.

[0053] By setting a V-shaped ring 13 between the outer ring 11 and the inner ring 12, when the airflow inside the exhaust pipe flows, the air pressure acts on the sealing side ring 2. The air pressure pushes the conical surface of the V-shaped ring 13 through the sealing side ring 2, causing the two ends of the V-shaped ring to push the outer ring 11 and the inner ring 12 to both sides, so that the outer ring 11 and the inner ring 12 fit more tightly with the inner wall of the exhaust pipe and the surface of the gas transmission pipe. Thus, the sealing effect of the sealing ring can be improved by utilizing the air pressure of the airflow.

[0054] Since the adhesion of the sealing ring is mainly caused by deformation of the sealing ring due to high temperature, the anti-adhesion effect of the sealing ring can be improved by setting a protective coating to enhance the high temperature resistance and wear resistance of the central ring structure.

[0055] By setting multiple annular grooves 21, the outer and inner surfaces of the sealing side ring 2 are made to fit in multiple segments with the exhaust pipe and gas transmission pipe, reducing the contact area and friction. At the same time, the sealing side ring 2 has better deformability. When the airflow interacts with it, it buffers the force of the airflow, reduces the vibration caused by the airflow, and improves the service life of the sealing ring.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of the invention. All such changes and modifications fall within the scope of the invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A high temperature anti-stick exhaust pipe seal ring comprising a center ring structure (1) and a sealing side ring (2), characterized in that: The surface of the central ring structure (1) is coated with a protective coating. The central ring structure (1) includes an outer ring (11), an inner ring (12), and two V-shaped rings (13). The outer ring (11) is sleeved on the outside of the inner ring (12). The two sides of the outer ring (11) are connected to the inner ring (12) through the V-shaped rings (13). The sealing side ring (2) is installed on the side of the central ring structure (1) and connects the outer ring (11) and the inner ring (12), and is sleeved on the V-shaped ring (13).

2. A high temperature anti-stick exhaust pipe seal ring according to claim 1, characterized in that: The protective coating is an aluminum titanium nitride coating and / or an aluminum chromium nitride coating and / or an aluminum titanium nitride coating.

3. A high temperature anti-stick exhaust pipe seal ring according to claim 2, wherein: The central ring structure (1) further includes a fixing protrusion (14), which is located on the side of the outer ring (11) away from the inner ring (12).

4. A high temperature anti-stick exhaust pipe seal ring according to claim 3, wherein: The fixing protrusion (14) is provided with a slot (111).

5. A high temperature anti-stick exhaust pipe seal ring according to claim 4, wherein: The top and bottom of the sealing side ring (2) are provided with multiple annular grooves (21) spaced apart.

6. A high temperature anti-stiction exhaust pipe seal ring according to claim 1, wherein: A buffer cavity is formed between the outer ring (11), the inner ring (12) and the two V-shaped rings (13), and a core ring (3) is provided inside the buffer cavity. A through hole (31) is provided on the core ring (3).

7. A high temperature anti-stiction exhaust pipe seal ring according to claim 1, wherein: Both sides of the outer ring (11) and the inner ring (12) are provided with annular assembly grooves (112). A positioning protrusion (4) is provided in the annular assembly groove (112). Two annular connecting blocks (22) are provided at intervals on the side of the sealing side ring (2) facing the central ring structure (1). A positioning groove (221) is provided on the annular connecting block (22). The annular connecting block (22) is inserted into the annular assembly groove (112), and the positioning groove (221) is sleeved on the positioning protrusion (4).

8. A high temperature anti-stiction exhaust pipe seal ring according to claim 1, wherein: Both sides of the V-shaped ring (13) are connected to the outer ring (11) and the inner ring (12) respectively through annular flanges (131).

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