A high temperature and high pressure resistant sealing ring

Abstract

The present invention is applicable to the field of sealing parts, specifically a high-temperature and high-pressure resistant sealing ring, comprising a main body ring made of high-temperature resistant material; an arc surface is provided at the opening at one end of the main body ring; a smooth surface is provided at the opening at the other end of the main body ring, and a high-temperature smooth material layer is laid; an inclined surface is provided on the main body ring to cooperate with the arc surface and the smooth surface, and the arc surface and the smooth surface cooperate with the inclined surface to form a three-point seal; the smooth surface is compressed by the downward expected force of the end cover plane, and the arc surface is forced to extend and expand the inclined surface outward, and contact with the main body sealing surface of the sealed space to form a sealing pressure ratio, so as to achieve the purpose of sealing, and can be suitable for occasions with abnormal temperature changes and fluctuations, effectively supplement the rebound amount, always maintain the original compression, ensure the sealing at this place, can better guarantee the sealing and operation stability, the overall resistance to high temperature and high pressure, excellent sealing performance, and prevent leakage, which solves the problem of poor resilience of the sealing ring caused by thermal expansion forcing the external sealing effect to be affected.

Description

Technical Field

[0001] The invention relates to the field of sealing parts, in particular to a high-temperature and high-pressure resistant sealing ring. Background Art

[0002] With the vigorous development of my country's coal chemical industry, processes such as water-coal slurry gasification and high-temperature Fischer-Tropsch process have been popularized.

[0003] In recent years, in order to improve the conversion rate of coal raw materials, the kerosene co-refining process has been derived. The high-temperature and high-pressure equipment of this process is in harsh working conditions such as high temperature, high pressure, and solid particles, which has led to the widespread application of high-temperature and high-pressure ball valves. The existing gasket structure at the strength seal is difficult to meet this working condition, sealing, life, etc. Therefore, the market urgently needs products that can adapt to this working condition process with high temperature resistance, high pressure, and sealing performance to prevent leakage. Summary of the invention

[0004] The purpose of the present invention is to provide a high temperature and high pressure sealing ring to solve the problem that in recent years, in order to improve the conversion rate of coal raw materials, a kerosene co-refining process has been derived. The high temperature and high pressure equipment of this process is in harsh working conditions such as high temperature, high pressure, and containing solid particles, which promotes the wide application of high temperature and high pressure ball valves. The existing strength seal gasket structure is difficult to meet this working condition, and has problems such as sealing and life. To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A high temperature and high pressure resistant sealing ring, comprising a body ring made of a high temperature resistant material;

[0006] The opening at one end of the body ring is provided with an arc surface; the opening at the other end of the body ring is provided with a smooth surface and is paved with a high-temperature smooth material layer;

[0007] The arc surface and the smooth surface of the main body ring are matched with an inclined surface, and the arc surface, the smooth surface and the inclined surface cooperate to form a three-point seal.

[0008] The main body ring made of high temperature resistant material adopts the lever mechanical principle structure design of three-point sealing formed by the arc surface, smooth surface and inclined surface, so as to avoid abnormal changes in the medium temperature, supplement the compression, ensure the effective long-term operation of the sealing ring, and always have a compressible specific pressure, thereby ensuring the external sealing, safety and stability of the valve. After being assembled to the sealing space, the smooth surface is compressed by the downward pre-tightening force of the end cover plane, and the arc surface is forced to extend and expand the inclined surface outward, and contact with the main body sealing surface of the sealing space to form a sealing specific pressure to achieve the purpose of sealing. The smooth surface improves the fit of the sealing surface, which can be used in occasions with abnormal temperature changes and fluctuations, effectively supplements the arc surface force to force the inclined surface to extend and expand outward, always maintains the original design compression, ensures the sealing at this place, can better ensure the sealing and the stability of the valve operation after being assembled in the valve, avoids external zero leakage, is overall resistant to high temperature and high pressure, has excellent sealing performance, prevents external leakage, and solves the problem of poor resilience of the sealing ring caused by thermal expansion forcing the external sealing effect to be affected.

[0009] In the present invention: the material of the body ring is a high temperature resistant material.

[0010] A further solution: the body ring is made of a high-temperature resistant alloy material, the high-temperature resistant alloy material undergoes a stabilized heat treatment, and the pre-compression amount is calculated according to the temperature and pressure to compensate for the thermal expansion coefficient.

[0011] In the present invention: the arc surface is inwardly convex.

[0012] In the present invention, the high-temperature smooth material layer is a silver-plated layer with a thickness of 0.055-0.095 mm. The silver-plated layer is used to compensate for the processed tiny rough surface, improve the smoothness and ensure the sealing.

[0013] A further solution: the high-temperature smooth material layer is a silver-plated layer with a thickness of 0.075 mm. The silver-plated layer is used to compensate for the processed tiny rough surface, improve the smoothness and ensure the sealing.

[0014] In the present invention: the inclined surface is arranged on the outer wall of the body ring and is in a sealed shape connected end to end;

[0015] The arc surface is arranged at one end of the inclined surface, and the smooth surface is arranged at the other end of the inclined surface, so that the arc surface, the inclined surface and the smooth surface are arranged in sequence to form a three-point seal.

[0016] A further solution: the inclined surface is in the shape of a truncated cone with a smaller outer diameter at one end close to the arc surface and a larger outer diameter at one end close to the smooth surface.

[0017] In the present invention: the smooth surface is inwardly convex.

[0018] The high-temperature and high-pressure sealing ring of the present invention comprises a main body ring made of high-temperature resistant material; an arc surface is provided at the opening of one end of the main body ring; a smooth surface is provided at the opening of the other end of the main body ring, and a high-temperature smooth material layer is laid; an inclined surface is provided on the main body ring to cooperate with the arc surface and the smooth surface, and the arc surface, the smooth surface and the inclined surface cooperate to form a three-point seal; the main body ring made of high-temperature resistant material adopts a lever mechanical principle structure design in which the arc surface, the smooth surface and the inclined surface cooperate to form a three-point seal, so as to avoid abnormal changes in the medium temperature, supplement the compression amount, ensure the effective long-term operation of the sealing ring, and always have a compressible specific pressure, thereby ensuring the external sealing, safety and stability of the valve, and when assembled to the sealing After the space position, the smooth surface is compressed by the downward pre-tightening force of the end cover plane, and the arc surface is forced to extend the inclined surface outward, and contact with the main sealing surface of the sealed space to form a sealing pressure ratio, so as to achieve the purpose of sealing. The smooth surface improves the fit of the sealing surface and can be used in occasions with abnormal temperature changes and fluctuations. It can effectively supplement the rebound amount of the arc surface forced to extend the inclined surface outward, always maintain the original design compression, ensure the sealing at this place, better guarantee the sealing and the stability of the valve operation after assembly in the valve, avoid external zero leakage, and is resistant to high temperature and high pressure as a whole, with excellent sealing performance, preventing external leakage, and solving the problem of poor resilience of the sealing ring caused by thermal expansion forcing the external sealing effect to be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a high temperature and high pressure resistant sealing ring of the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the transverse cross-sectional structure.

[0021] In the figure: 1-arc surface; 2-inclined surface; 3-smooth surface. DETAILED DESCRIPTION

[0022] The purpose of the present invention is to provide a high temperature and high pressure sealing ring to solve the problem that in recent years, in order to improve the conversion rate of coal raw materials, a kerosene co-refining process has been derived. The high temperature and high pressure equipment of this process is in harsh working conditions such as high temperature, high pressure, and containing solid particles, which promotes the wide application of high temperature and high pressure ball valves. The existing strength seal gasket structure is difficult to meet this working condition, and has problems such as sealing and life. To achieve the above purpose, the present invention provides the following technical solutions:

[0023] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, a high-temperature and high-pressure sealing ring comprises a main body ring made of high-temperature resistant material; a circular arc surface 1 is provided at an opening at one end of the main body ring; a smooth surface 3 is provided at an opening at one end of the main body ring, and a high-temperature smooth material layer is paved; an inclined surface 2 is provided on the main body ring to cooperate with the circular arc surface 1 and the smooth surface 3, and the circular arc surface 1 and the smooth surface 3 cooperate with the inclined surface 2 to form a three-point seal.

[0024] In the embodiment of the present invention, the main body ring made of high temperature resistant material adopts the lever mechanical principle structure design in which the arc surface 1 and the smooth surface 3 cooperate with the inclined surface 2 to form a three-point seal, so as to avoid abnormal changes in the medium temperature, supplement the compression amount, ensure the effective long-term operation of the sealing ring, and always have a compressible specific pressure, thereby ensuring the external sealing, safety and stability of the valve. After being assembled to the sealing space position, the smooth surface 3 is compressed by the downward pre-tightening force of the end cover plane, and the arc surface 1 is forced to force the inclined surface 2 to extend outward and contact with the main body sealing surface of the sealing space to form a sealing specific pressure, so as to achieve the purpose of sealing. The smooth surface 3 improves the fit of the sealing surface, and can be used in occasions with abnormal temperature changes and fluctuations. It effectively supplements the arc surface 1 that forces the inclined surface 2 to extend outward and expand the rebound amount, always maintains the original design compression, ensures the sealing at this location, can better ensure the sealing and the stability of the valve operation after being assembled in the valve, avoids external zero leakage, is overall resistant to high temperature and high pressure, has excellent sealing performance, prevents external leakage, and solves the problem that the poor resilience of the sealing ring caused by thermal expansion forces the external sealing effect to be affected.

[0025] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the material of the main body ring is a high temperature resistant material; in a further solution, the material of the main body ring is a high temperature resistant alloy material, and the high temperature resistant alloy material undergoes a stabilized heat treatment, and the pre-compression amount is calculated according to the temperature and pressure to compensate for the thermal expansion coefficient. Among them, the high temperature resistant alloy material can be replaced by a high temperature resistant rubber material (high temperature resistant rubber materials include EPDM rubber, silicone rubber, fluororubber, perfluoroether, butadiene rubber, etc.), or a high temperature resistant plastic material, etc. (high temperature resistant plastic materials include polyimide PI, polyetheretherketone PEEK, polyamideimide PAI, polyetherimide PEI, polyphenylene sulfide PPS, nylon 46, polysulfone PSU, polyethersulfone PES, polytetrafluoroethylene PTFE, polyvinylidene fluoride PVDF, etc.), and there is no restriction on which one is used, as long as it can meet the requirements of being stabilized heat treated, calculating the pre-compression amount according to the temperature and pressure, and compensating for the thermal expansion coefficient. The preferred material of the main body ring is a high temperature resistant alloy material.

[0026] In the embodiment of the present invention, Figure 1 and Figure 2As shown, the arc surface 1 is inwardly convex; the high-temperature smooth material layer is a silver-plated layer with a thickness of 0.055-0.095mm. The silver-plated layer is used to compensate for the tiny rough surfaces of the processing, improve the smoothness and ensure the sealing. In a further scheme, the high-temperature smooth material layer is a silver-plated layer with a thickness of 0.075mm. The silver-plated layer is used to compensate for the tiny rough surfaces of the processing, improve the smoothness and ensure the sealing. Among them, the high-temperature smooth material layer can also be other metal coatings or synthetic material coatings. There is no restriction on which one is used, as long as it can meet the requirements of compensating for the tiny rough surfaces of the processing, improving the smoothness and ensuring the sealing. Preferably, the high-temperature smooth material layer is a silver-plated layer; and the thickness of the high-temperature smooth material layer is not limited to 0.055-0.095mm, as long as it can meet the requirements of compensating for the tiny rough surfaces of the processing, improving the smoothness and ensuring the sealing. Preferably, the thickness of the high-temperature smooth material layer is 0.075mm.

[0027] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the smooth surface 3 is inwardly convex; the inclined surface 2 is arranged on the outer wall of the main body ring and is in a sealed shape connected end to end; the arc surface 1 is arranged at one end of the inclined surface 2, and the smooth surface 3 is arranged at the other end of the inclined surface 2, and the arc surface 1, the inclined surface 2 and the smooth surface 3 are arranged in sequence to form a three-point seal; in a further solution, the inclined surface 2 is in the shape of a truncated cone with a small outer diameter at one end close to the arc surface 1 and a large outer diameter at one end close to the smooth surface 3.

[0028] The high-temperature and high-pressure sealing ring of the present invention comprises a main body ring made of high-temperature resistant material; a circular arc surface 1 is provided at the opening of one end of the main body ring; a smooth surface 3 is provided at the opening of the other end of the main body ring, and a high-temperature smooth material layer is laid; an inclined surface 2 is provided on the main body ring to cooperate with the circular arc surface 1 and the smooth surface 3, and the circular arc surface 1 and the smooth surface 3 cooperate with the inclined surface 2 to form a three-point seal; the main body ring made of high-temperature resistant material adopts a lever mechanical principle structural design in which the circular arc surface 1 and the smooth surface 3 cooperate with the inclined surface 2 to form a three-point seal, so as to avoid abnormal changes in the medium temperature, supplement the compression amount, ensure the effective long-term operation of the sealing ring, and always have a compressible specific pressure, thereby ensuring the external sealing, safety and stability of the valve, and when assembled to After the sealing space is in position, the smooth surface 3 is compressed by the downward pre-tightening force of the end cover plane, and the arc surface 1 is forced to force the inclined surface 2 to extend outward, and contact with the main sealing surface of the sealing space to form a sealing specific pressure, thereby achieving the purpose of sealing. The smooth surface 3 improves the fit of the sealing surface and can be used in occasions with abnormal temperature changes and fluctuations. It effectively supplements the amount of rebound caused by the arc surface 1 forcing the inclined surface 2 to extend outward, always maintains the original design compression, ensures the sealing at this location, can better guarantee the sealing and the stability of the valve operation after being assembled in the valve, avoids external zero leakage, is resistant to high temperature and high pressure as a whole, has excellent sealing performance, prevents external leakage, and solves the problem of poor resilience of the sealing ring caused by thermal expansion forcing the external sealing effect to be affected.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0030] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A high temperature and high pressure resistant sealing ring, characterized in that: It includes a body ring made of a high temperature resistant material; The opening at one end of the body ring is provided with an arc surface; the opening at the other end of the body ring is provided with a smooth surface and is paved with a high-temperature smooth material layer; The body ring is provided with an inclined surface on the arc surface and the smooth surface, and the arc surface, the smooth surface and the inclined surface cooperate to form a three-point seal; The material of the body ring is a high temperature resistant alloy material; The arc surface is inwardly convex; The high temperature smooth material layer is a silver-plated layer with a thickness of 0.075 mm; The inclined surface is arranged on the outer wall of the body ring and is in a sealed shape connected end to end; The arc surface is arranged at one end of the inclined surface, and the smooth surface is arranged at the other end of the inclined surface, so that the arc surface, the inclined surface and the smooth surface are arranged in sequence to form a three-point seal; The inclined surface is in the shape of a truncated cone with a smaller outer diameter at one end close to the arc surface and a larger outer diameter at one end close to the smooth surface; The smooth surface is inwardly convex.

Images