A refractory tube and a method of making the same

Abstract

This invention discloses a fire-resistant pipe and its preparation method, including a fire-resistant pipe joint. A fire-resistant pipe body is provided on one side of the joint. An inner layer of high-silica oxygen gel felt is bonded and wrapped around the outer side of the fire-resistant pipe body. A central uniform support heat dissipation component is provided on the fire-resistant pipe body. An inner layer of steel wire mesh is provided on the outer side of the central uniform support heat dissipation component. An outer layer of high-silica oxygen gel felt is provided on the outer side of the inner layer of steel wire mesh. An outer layer of steel wire mesh is provided on the outer side of the outer layer of high-silica oxygen gel felt. In this invention, the central uniform support heat dissipation component supports the outer inner layer of steel wire mesh, the outer high-silica oxygen gel felt, and the outer steel wire mesh. Multiple heat-conducting fins are arranged in a spiral staggered manner, achieving a uniform support effect. Supported by support rods, a certain safe space gap is formed, providing safety protection during heat transfer. Temperature dissipation is achieved through the internal space.

Description

Technical Field

[0001] This invention relates to the field of refractory pipe technology, and in particular to a refractory pipe and its preparation method. Background Technology

[0002] In high-risk operations such as offshore oil and gas drilling, port oil and gas transportation, and downhole operations, oil and gas pipelines often face extreme environments such as high temperatures, open flames, and jet flames. Once a fire occurs, the pipeline is prone to failure due to high temperatures, leading to major safety accidents such as oil and gas leaks, explosions, and environmental pollution. Therefore, pipelines used for oil and gas extraction and transportation must have reliable fire-resistant protection capabilities to meet the requirements of structural integrity and pressure-bearing sealing under fire conditions.

[0003] Currently, the global oil industry widely adopts API 17K "Bonded Flexible Pipe Specification" as the design, manufacturing, and acceptance standard for flexible oil pipes. This standard mainly specifies the conventional mechanical properties and structural requirements of flexible pipes, such as tensile, torsion, bending, and pressure resistance. However, it does not specify built-in fire resistance performance indicators for the pipe body. Traditional fire protection solutions for API 17K bonded flexible pipes generally rely on external fireproof wrapping, application of flame-retardant coatings, or covering with flame-retardant boards to achieve passive fire protection, which generally has a limited fire protection effect. Therefore, a fire-resistant pipe is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a refractory pipe and its preparation method, thereby solving the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A fire-resistant pipe includes a fire-resistant pipe joint. A fire-resistant pipe body is provided on one side of the fire-resistant pipe joint. An inner layer of high-silica oxygen gel felt is attached and wrapped on the outer side of the fire-resistant pipe body. A central uniform support heat dissipation component is provided on the fire-resistant pipe body. An inner layer of steel wire mesh is provided on the outer side of the central uniform support heat dissipation component. An outer layer of high-silica oxygen gel felt is provided on the outer side of the inner layer of steel wire mesh. An outer layer of steel wire mesh is provided on the outer side of the outer layer of high-silica oxygen gel felt. A fixing ring is provided on the fixing ring. A support column is installed on the fixing ring through an edge tension adjustment component. An end restraint component is provided on the support column. The end restraint component is connected to the inner layer of steel wire mesh, the outer layer of high-silica oxygen gel felt, and the outer layer of steel wire mesh. The fire-resistant pipe joint has multiple joint fixing holes.

[0006] Preferably, the central uniform support heat dissipation assembly includes multiple mounting rings fixedly installed on the fire-resistant pipe body. Each mounting ring is provided with a heat insulation plate. A support rod is fixedly installed on the top of the heat insulation plate. A heat-conducting heat dissipation fin is fixedly installed on the top of the support rod. The heat-conducting heat dissipation fin has an arc-shaped structure and is in contact with the inner wall of the inner steel wire mesh.

[0007] Preferably, multiple heat-conducting fins are arranged in a spiral staggered manner, the heat insulation board is a rock wool board, and the heat-conducting fins are aluminum alloy.

[0008] Preferably, the inner wire mesh, the outer high-silica oxygen gel felt, and the outer wire mesh are all provided with arc-shaped extension sections at their ends, and the arc-shaped extension sections extend outward in an arc shape.

[0009] Preferably, the end constraint assembly includes an inner clamping ring and an outer clamping ring, with an inner wire mesh, an outer high-silica oxygen gel felt, and an outer wire mesh located between the inner clamping ring and the outer clamping ring, and one end of the support column passing through the inner clamping ring, the inner wire mesh, the outer high-silica oxygen gel felt, the outer wire mesh, and the outer clamping ring in sequence.

[0010] Preferably, a bottom support block is fixedly sleeved on the support column, the bottom support block is in contact with the bottom of the inner clamping ring, a connecting screw end is provided at the top of the support column, an upper clamping pad is movably sleeved on the connecting screw end, the upper clamping pad is located above the outer clamping ring, and a connecting nut is threaded on the connecting screw end.

[0011] Preferably, the edge tension adjustment assembly includes an adjustment pressing groove formed on the fixed ring, an adjustment stud rotatably mounted on the inner wall of the adjustment pressing groove, one end of the adjustment stud extending outside the fixed ring, and a set of guide posts fixedly mounted on the inner wall of the adjustment pressing groove.

[0012] Preferably, a convex adjusting block is fixedly installed at the bottom of the support column, the convex adjusting block is threaded onto the adjusting stud, and the convex adjusting block is movably sleeved on a set of guide columns.

[0013] A method for preparing a refractory pipe, the method comprising: Step 1: First, attach and install the inner layer of high-silica oxygen gel felt onto the fire-resistant pipe body to achieve inner layer bonding and protection. Heat insulation boards are set at the joints of multiple mounting rings to achieve the effect of blocking heat conduction. Support rods and heat-conducting fins are set on the heat insulation boards to support the outer inner layer of steel wire mesh, outer high-silica oxygen gel felt, and outer steel wire mesh. The heat-conducting fins on the multiple mounting rings are spirally staggered to achieve a uniform support effect. The support rods create a certain safe space gap between the fire-resistant pipe body and the outer protection, forming a safety protection during heat transfer. The heat-conducting fins can conduct external heat and dissipate heat through the internal space. Step 2: The outer protection is a combination of inner steel wire mesh, outer high silica oxygen gel felt and outer steel wire mesh. The softening point of the outer high silica oxygen gel felt is ≈1700℃. Through the inner and outer steel wire mesh, the internal structure of the oil pipe remains unchanged, which increases the fire resistance of the oil pipe while ensuring that the original tensile, torsional and bending properties of the oil pipe remain unchanged. Step 3: The support column is equipped with an inner and outer clamping ring to constrain and compress the inner wire mesh, the outer high-silica oxygen gel felt, and the outer wire mesh, thereby fixing the position of the end. The arc-shaped extension section facilitates heat dissipation of the internal temperature and protects the end of the fire-resistant pipe body from the end. Step 4: Rotate the adjusting stud to move the convex adjusting block. After the convex adjusting block moves, it can move the fixed inner clamping ring and the outer ends of the outer clamping ring. After the ends move, the inner wire mesh, the outer high-silica oxygen gel felt and the outer wire mesh can be kept in a taut state to avoid the problem of loosening.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the fire-resistant pipe has an inner high-silica oxygen gel felt attached to the pipe body to achieve inner layer bonding protection. The central uniform support heat dissipation component supports the outer inner steel wire mesh, outer high-silica oxygen gel felt and outer steel wire mesh. Multiple heat-conducting heat dissipation fins are arranged in a spiral staggered manner to achieve a uniform support effect. Supported by support rods, a certain safety space gap is formed to form a safety protection during heat transfer. Temperature dissipation is achieved through the internal space. 2. In this invention, the fire-resistant pipe is provided with an inner layer of steel wire mesh, an outer layer of high-silica oxygen gel felt, and an outer layer of steel wire mesh, which together provide external protection and increase the fire resistance of the oil pipe while ensuring that the original tensile, torsional, and bending properties of the oil pipe remain unchanged. 3. In this invention, the fire-resistant pipe is provided with an end restraint assembly, an inner clamping ring and an outer clamping ring, which can restrain and clamp the inner steel wire mesh, the outer high-silica oxygen gel felt and the outer steel wire mesh to fix the position of the end; 4. In this invention, the fire-resistant pipe is equipped with an edge tension adjustment component. The rotating adjustment stud drives the convex adjustment block to move, thereby driving the fixed inner and outer pressure rings to move at both ends, so that the inner wire mesh, the outer high-silica oxygen gel felt and the outer wire mesh are in a taut state, avoiding the problem of loosening. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the vertical section of the present invention; Figure 4 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 5 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 6 For the present invention Figure 2A schematic diagram of the structure of part A.

[0016] In the diagram: 1. Fire-resistant pipe joint; 2. Fire-resistant pipe body; 3. Joint fixing hole; 4. Inner layer high-silica oxygen gel felt; 5. Mounting ring; 6. Insulation board; 7. Support rod; 8. Heat-conducting fins; 9. Inner layer steel wire mesh; 10. Outer layer high-silica oxygen gel felt; 11. Outer layer steel wire mesh; 12. Arc-shaped extension section; 13. Fixing ring; 14. Adjusting and clamping groove; 15. Adjusting stud; 16. Guide post; 17. Convex adjusting block; 18. Support post; 19. Bottom support block; 20. Inner clamping ring; 21. Outer clamping ring; 22. Connecting screw end; 23. Upper clamping washer; 24. Connecting nut. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for 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, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this patent based on the specific circumstances.

[0019] Example: Refer to Figure 1-6A fire-resistant pipe includes a fire-resistant pipe joint (1), a fire-resistant pipe body (2) is provided on one side of the fire-resistant pipe joint (1), and an inner layer of high-silica oxygen gel felt (4) is attached and wrapped on the outside of the fire-resistant pipe body (2). The inner layer of high-silica oxygen gel felt (4) is first attached and installed on the fire-resistant pipe body (2) to achieve inner layer bonding protection. A central uniform support heat dissipation component is provided on the fire-resistant pipe body (2), and an inner layer of steel wire mesh (9) is provided on the outside of the central uniform support heat dissipation component. An outer layer of high-silica oxygen gel felt (4) is provided on the outside of the inner layer of steel wire mesh (9). The outer layer of high silica oxygen gel felt (10) is provided with an outer layer of steel wire mesh (11). The fire-resistant pipe body (2) is provided with a fixing ring (13). The fixing ring (13) is provided with a support column (18) installed on it through the edge tension adjustment component. The support column (18) is provided with an end constraint component. The end constraint component is connected to the inner steel wire mesh (9), the outer high silica oxygen gel felt (10) and the outer steel wire mesh (11). The fire-resistant pipe joint (1) is provided with multiple joint fixing holes (3).

[0020] As a technical optimization of the present invention, the central uniform support heat dissipation assembly includes multiple mounting rings (5) fixedly installed on the fire-resistant pipe body (2). Each mounting ring (5) is provided with a heat insulation plate (6). A support rod (7) is fixedly installed on the top of the heat insulation plate (6). A heat-conducting heat dissipation fin (8) is fixedly installed on the top of the support rod (7). The heat-conducting heat dissipation fin (8) is set with an arc structure. The heat-conducting heat dissipation fin (8) is in contact with the inner wall of the inner steel wire mesh (9). The multiple heat-conducting heat dissipation fins (8) are arranged in a spiral staggered manner. The heat insulation plate (6) is a rock wool board, and the heat-conducting heat dissipation fins (8) are aluminum alloy. Multiple mounting rings (5) are provided on the fire-resistant pipe body (2). The joints with the multiple mounting rings (5) are provided with The heat insulation plate (6) is provided to achieve the effect of heat conduction blocking. The heat insulation plate (6) is provided with support rods (7) and heat-conducting heat sinks (8), which can support the inner steel wire mesh (9), the outer high silica oxygen gel felt (10) and the outer steel wire mesh (11) on the outside. The heat-conducting heat sinks (8) on multiple mounting rings (5) are arranged in a spiral staggered manner to achieve a uniform support effect. After support, the pipe is still a circular structure when viewed from the outside. By setting the support rods (7), a certain safe space gap is formed between the fire-resistant pipe body (2) and the outer protection. During the heat transfer process, a safety protection is formed. The heat-conducting heat sinks (8) can conduct external heat and achieve temperature dissipation through the internal space.

[0021] As a technical optimization of the present invention, the ends of the inner wire mesh (9), the outer high-silica oxygen gel felt (10) and the outer wire mesh (11) are all provided with arc-shaped extension sections (12). The arc-shaped extension sections (12) extend outward in an arc shape. The outer protection is a combination of the inner wire mesh (9), the outer high-silica oxygen gel felt (10) and the outer wire mesh (11). The softening point of the outer high-silica oxygen gel felt (10) is ≈1700℃. When the flame burns for a long time, the fire resistance temperature can reach 900~1000℃. When the flame burns for a short time, the fire resistance temperature can reach 1200~1400℃. Through the inner and outer wire meshes, the internal structure of the oil pipe remains unchanged. While ensuring that the original tensile, torsional and bending properties of the oil pipe remain unchanged, the fire resistance of the oil pipe is increased.

[0022] As a technical optimization of the present invention, the end constraint assembly includes an inner clamping ring (20) and an outer clamping ring (21). The inner wire mesh (9), the outer high-silica oxygen gel felt (10), and the outer wire mesh (11) are located between the inner clamping ring (20) and the outer clamping ring (21). One end of the support column (18) passes through the inner clamping ring (20), the inner wire mesh (9), the outer high-silica oxygen gel felt (10), the outer wire mesh (11), and the outer clamping ring (21) in sequence. 21), a bottom support block (19) is fixedly sleeved on the support column (18), the bottom support block (19) is in contact with the bottom of the inner clamping ring (20), a connecting screw end (22) is provided at the top of the support column (18), an upper clamping pad (23) is movably sleeved on the connecting screw end (22), the upper clamping pad (23) is located above the outer clamping ring (21), a connecting nut (24) is threaded on the connecting screw end (22), and a fixed end is provided at the end of the fire-resistant pipe body (2). The fixed ring (13) is provided with a support column (18). The support column (18) is supported and installed with an inner clamping ring (20) and an outer clamping ring (21). The inner clamping ring (20) and the outer clamping ring (21) can constrain and compress the inner wire mesh (9), the outer high silica oxygen gel felt (10) and the outer wire mesh (11) to fix the position of the ends. After compression, the upper clamping pad (23) is put on the connecting screw end (22) and the connecting nut (24) is connected. The thread is installed on the connecting screw end (22). By rotating and pressing from above, the inner clamping ring (20), the outer clamping ring (21) and the support column (18) can be fixedly connected, thereby achieving the fixation of the end position. The arc-shaped extension section (12) is set. The ends of the inner wire mesh (9), the outer high silica oxygen gel felt (10) and the outer wire mesh (11) extend outward in an arc shape, which facilitates the heat dissipation of the internal temperature and at the same time protects the end of the fire-resistant pipe body (2) from the end.

[0023] As a technical optimization of the present invention, the edge tension adjustment assembly includes an adjustment pressing groove (14) formed on the fixed ring (13). An adjustment stud (15) is rotatably installed on the inner wall of the adjustment pressing groove (14). One end of the adjustment stud (15) extends outside the fixed ring (13). A set of guide posts (16) is fixedly installed on the inner wall of the adjustment pressing groove (14). A convex adjustment block (17) is fixedly installed at the bottom of the support column (18). The convex adjustment block (17) is threaded onto the adjustment stud (15). The convex adjustment block (17) is movably sleeved on a set of guide posts (16). To ensure the external... The inner wire mesh (9), the outer high-silica oxygen gel felt (10), and the outer wire mesh (11) are in a taut state. The operator rotates the adjusting stud (15), which drives the convex adjusting block (17) to move. The guide post (16) can limit the position of the convex adjusting block (17). After the convex adjusting block (17) moves, it can drive the fixed inner pressure ring (20) and the outer pressure ring (21) to move at both ends. After the two ends move, the inner wire mesh (9), the outer high-silica oxygen gel felt (10), and the outer wire mesh (11) can be in a taut state to avoid the problem of loosening.

[0024] A method for preparing a refractory pipe, the method comprising: Step 1: First, attach and install the inner layer of high silica oxygen gel felt (4) on the fire-resistant pipe body (2) to achieve inner layer bonding protection. Heat insulation plate (6) is set at the bonding connection of multiple mounting rings (5) to achieve the effect of heat conduction blocking. Support rod (7) and heat-conducting heat sink (8) are set on the heat insulation plate (6) to support the outer inner layer steel wire mesh (9), outer high silica oxygen gel felt (10) and outer steel wire mesh (11). The heat-conducting heat sink (8) on multiple mounting rings (5) is set in a spiral staggered manner to achieve a uniform support effect. Through the setting of support rod (7), a certain safe space gap is formed between the fire-resistant pipe body (2) and the outer protection. In the process of heat transfer, a safety protection is formed. The heat-conducting heat sink (8) can conduct external heat and achieve temperature dissipation through the internal space. Step 2: The outer protection is a combination of inner steel wire mesh (9), outer high silica oxygen gel felt (10) and outer steel wire mesh (11). The softening point of the outer high silica oxygen gel felt (10) is ≈1700℃. Through the inner and outer steel wire mesh, the internal structure of the oil pipe remains unchanged. While ensuring that the original tensile, torsional and bending properties of the oil pipe remain unchanged, the fire resistance of the oil pipe is increased. Step 3: The support column (18) is supported and installed with an inner clamping ring (20) and an outer clamping ring (21) to constrain and clamp the inner wire mesh (9), the outer high silica oxygen gel felt (10) and the outer wire mesh (11) to fix the position of the end. The arc-shaped extension section (12) is set to facilitate the heat dissipation of the internal temperature, and at the same time protects the end of the fire-resistant pipe body (2) from the end. Step 4: Rotate the adjusting stud (15) to move the convex adjusting block (17). After the convex adjusting block (17) moves, it can move the fixed inner clamping ring (20) and the outer clamping ring (21) at both ends. After the two ends move, the inner wire mesh (9), the outer high silica oxygen gel felt (10) and the outer wire mesh (11) can be in a taut state to avoid the problem of loosening.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire-resistant pipe, comprising a fire-resistant pipe joint (1), characterized in that, A fire-resistant pipe body (2) is provided on one side of the fire-resistant pipe joint (1). The outer side of the fire-resistant pipe body (2) is wrapped with an inner layer of high-silica oxygen gel felt (4). A central uniform support heat dissipation component is provided on the fire-resistant pipe body (2). An inner layer of steel wire mesh (9) is provided on the outer side of the central uniform support heat dissipation component. An outer layer of high-silica oxygen gel felt (10) is provided on the outer side of the inner layer of steel wire mesh (9). An outer layer of steel wire mesh (11) is provided on the outer side of the outer layer of high-silica oxygen gel felt (10). A fixing ring (13) is provided on the fire-resistant pipe body (2). A support column (18) is installed on the fixing ring (13) through an edge tension adjustment component. An end constraint component is provided on the support column (18). The end constraint component is connected to the inner layer of steel wire mesh (9), the outer layer of high-silica oxygen gel felt (10) and the outer layer of steel wire mesh (11). A plurality of joint fixing holes (3) are opened on the fire-resistant pipe joint (1).

2. A refractory pipe according to claim 1, characterized in that, The central uniform support heat dissipation assembly includes multiple mounting rings (5) fixedly installed on the fire-resistant pipe body (2). Each mounting ring (5) is provided with a heat insulation plate (6). A support rod (7) is fixedly installed on the top of the heat insulation plate (6). A heat-conducting heat dissipation fin (8) is fixedly installed on the top of the support rod (7). The heat-conducting heat dissipation fin (8) is an arc-shaped structure and is in contact with the inner wall of the inner wire mesh (9).

3. A refractory pipe according to claim 2, characterized in that, Multiple heat-conducting fins (8) are arranged in a spiral staggered manner. The heat insulation board (6) is a rock wool board, and the heat-conducting fins (8) are aluminum alloy.

4. A refractory pipe according to claim 1, characterized in that, The inner wire mesh (9), the outer high-silica oxygen gel felt (10) and the outer wire mesh (11) are all provided with arc-shaped extension sections (12) at their ends, and the arc-shaped extension sections (12) extend outward in an arc shape.

5. A refractory pipe according to claim 1, characterized in that, The end restraint assembly includes an inner clamping ring (20) and an outer clamping ring (21). The inner wire mesh (9), the outer high-silica oxygen gel felt (10), and the outer wire mesh (11) are located between the inner clamping ring (20) and the outer clamping ring (21). One end of the support column (18) passes through the inner clamping ring (20), the inner wire mesh (9), the outer high-silica oxygen gel felt (10), the outer wire mesh (11), and the outer clamping ring (21) in sequence.

6. A refractory pipe according to claim 5, characterized in that, A bottom support block (19) is fixedly sleeved on the support column (18). The bottom support block (19) is in contact with the bottom of the inner clamping ring (20). A connecting screw end (22) is provided at the top of the support column (18). An upper clamping pad (23) is movably sleeved on the connecting screw end (22). The upper clamping pad (23) is located above the outer clamping ring (21). A connecting nut (24) is threaded on the connecting screw end (22).

7. A refractory pipe according to claim 1, characterized in that, The edge tension adjustment assembly includes an adjustment pressing groove (14) opened on the fixed ring (13), an adjustment stud (15) is rotatably installed on the inner wall of the adjustment pressing groove (14), one end of the adjustment stud (15) extends to the outside of the fixed ring (13), and a set of guide posts (16) are fixedly installed on the inner wall of the adjustment pressing groove (14).

8. A refractory pipe according to claim 7, characterized in that, A convex adjusting block (17) is fixedly installed at the bottom of the support column (18). The convex adjusting block (17) is threaded onto the adjusting stud (15) and movably fitted onto a set of guide columns (16).

9. A method for preparing a refractory pipe according to any one of claims 1-8, characterized in that, The method includes: Step 1: First, attach and install the inner layer of high silica oxygen gel felt (4) on the fire-resistant pipe body (2) to achieve inner layer bonding protection. Heat insulation plate (6) is set at the bonding connection of multiple mounting rings (5) to achieve the effect of heat conduction blocking. Support rod (7) and heat-conducting heat sink (8) are set on the heat insulation plate (6) to support the outer inner layer steel wire mesh (9), outer high silica oxygen gel felt (10) and outer steel wire mesh (11). The heat-conducting heat sink (8) on multiple mounting rings (5) is set in a spiral staggered manner to achieve a uniform support effect. Through the setting of support rod (7), a certain safe space gap is formed between the fire-resistant pipe body (2) and the outer protection. In the process of heat transfer, a safety protection is formed. The heat-conducting heat sink (8) can conduct external heat and achieve temperature dissipation through the internal space. Step 2: The outer protection is a combination of inner steel wire mesh (9), outer high silica oxygen gel felt (10) and outer steel wire mesh (11). The softening point of the outer high silica oxygen gel felt (10) is ≈1700℃. Through the inner and outer steel wire mesh, the internal structure of the oil pipe remains unchanged. While ensuring that the original tensile, torsional and bending properties of the oil pipe remain unchanged, the fire resistance of the oil pipe is increased. Step 3: The support column (18) is supported and installed with an inner clamping ring (20) and an outer clamping ring (21) to constrain and clamp the inner wire mesh (9), the outer high silica oxygen gel felt (10) and the outer wire mesh (11) to fix the position of the end. The arc-shaped extension section (12) is set to facilitate the heat dissipation of the internal temperature, and at the same time protects the end of the fire-resistant pipe body (2) from the end. Step 4: Rotate the adjusting stud (15) to move the convex adjusting block (17). After the convex adjusting block (17) moves, it can move the fixed inner clamping ring (20) and the outer clamping ring (21) at both ends. After the two ends move, the inner wire mesh (9), the outer high silica oxygen gel felt (10) and the outer wire mesh (11) can be in a taut state to avoid the problem of loosening.

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