Thermal insulation RTP pipe

Abstract

The utility model relates to the technical field of pipelines, in particular to a heat preservation RTP pipe which is characterized in that a pipe body sequentially comprises an inner thermoplastic plastic layer, a reinforcing layer and an outer thermoplastic plastic layer from inside to outside, a heat preservation layer is further arranged on the outer side of the outer layer of an RTP pipe main body, and a protective layer is arranged on the outer side of the heat preservation layer; the heat preservation layer can conduct heat preservation on media conveyed in the pipe body, the purpose of improving the heat preservation effect of the pipe body is achieved, and the problems that energy is wasted or the properties of the conveyed media are affected due to heat loss are solved.

Description

Technical Field

[0001] This application relates to the technical field of pipelines, and particularly to a heat-insulating RTP pipe. Background Art

[0002] At present, the RTP pipe body, that is, the reinforced thermoplastic pipe, can withstand several times the internal pressure of the ordinary HDPE pipe body under the same outer diameter and wall thickness, which makes it suitable for high-pressure transmission scenarios, such as the long-distance transmission of oil and gas.

[0003] The existing RTP pipe body sequentially includes an inner thermoplastic layer, a reinforcing layer, and an outer thermoplastic layer from the inside to the outside.

[0004] The above-mentioned existing technical solutions have the following defects: The traditional RTP pipe cannot meet the good heat-insulating requirements. The heat loss will not only cause energy waste, but also may affect the physical and chemical properties of the medium transported in the pipe. Utility Model Content

[0005] In order to achieve the effect of improving the heat-insulating ability of the pipe body, this application provides a heat-insulating RTP pipe.

[0006] The above technical purpose of this application is achieved through the following technical solutions:

[0007] A heat-insulating RTP pipe, the RTP pipe body sequentially includes an inner thermoplastic layer, a reinforcing layer, and an outer thermoplastic layer from the inside to the outside. A heat-insulating layer is further provided on the outside of the outer layer of the RTP pipe body, and a protective layer is provided on the outside of the heat-insulating layer.

[0008] By adopting the above solution, because the heat-insulating layer is provided, the heat-insulating layer can effectively insulate the pipe body; and because the protective layer is provided, the protective layer can protect the heat-insulating layer to avoid scratching the heat-insulating layer by the gravel impurities on the working surface when towing, pulling, or dragging the pipe body on the working surface; the heat-insulating layer can insulate the medium transported in the pipe, achieving the purpose of improving the heat-insulating effect of the pipe body and avoiding problems such as energy waste caused by heat loss or affecting the properties of the transported medium.

[0009] Further, the material of the heat-insulating layer is polyurethane foam.

[0010] By adopting the above solution, the thermal conductivity of polyurethane foam is very low. The thermal conductivity of rigid polyurethane foam plastic is only 0.022 - 0.033 W / (m·K), which is equivalent to half of that of extruded board and is one of the materials with relatively low thermal conductivity among current heat-insulating materials. It can effectively prevent the transfer of heat and reduce heat loss, thus achieving a good heat-insulating effect.

[0011] Further, a moisture-proof layer is provided between the heat-insulating layer and the protective layer.

[0012] Further, the moisture-proof layer is an aluminum foil composite tape, and the aluminum foil composite tape is spirally wound around the outside of the heat-insulating layer.

[0013] By adopting the above scheme, by spirally winding the aluminum foil composite tape around the outside of the heat-insulating layer, firstly, it is convenient to evenly distribute stress and can effectively improve the structural strength; secondly, the stress on the protective layer is made uniform, and the protective layer can be protected in all directions; moreover, the aluminum foil tape is made by directly rolling metal aluminum into thin sheets, and its molecular structure is compact and has no air permeability. This compact structure makes it difficult for water molecules to penetrate, thus effectively preventing the intrusion of external moisture, and further avoiding the deformation of the heat-insulating layer due to moisture absorption.

[0014] Further, the protective layer is made of polyethylene material.

[0015] By adopting the above scheme, the polyethylene material has good flexibility. It can be bent and folded to a certain extent without easily breaking. This enables it, when used as a protective layer, to adapt to objects to be protected with different shapes, closely fit on the surface of the object, and provide all-round protection; polyethylene can absorb and disperse external impact forces. When subjected to external impact, the polyethylene molecular chains can relieve the impact energy through their own deformation, reducing damage to the object to be protected, so as to effectively protect the object from damage caused by collisions, drops, etc. Because the polyethylene material has the above characteristics, it can better protect the moisture-proof layer.

[0016] Further, an air cushion layer is provided outside the protective layer. The air cushion layer includes first buffer ribs and second buffer ribs. A plurality of first buffer ribs are provided, and the plurality of first buffer ribs are evenly arranged in a circular shape on the surface of the protective layer and fixedly connected to the protective layer; a plurality of second buffer ribs are provided, the second buffer ribs are perpendicular to the first buffer ribs, and the plurality of second buffer ribs are evenly arranged in a circular shape on the outside of the first buffer ribs and are all fixedly connected to the first buffer ribs.

[0017] By adopting the above scheme, the first buffer ribs and the second buffer ribs form an elastic net, so that there is a certain movement margin between the second buffer ribs and the protective layer. When pulling the pipe body to move along the working surface, the sand and gravel on the working surface fly to the second buffer ribs. After the second buffer ribs are stressed, they will move towards the direction close to the first buffer ribs, and then the second buffer ribs will rebound the sand and gravel under their own elastic action, achieving the effect of rebounding the sand and gravel, and further being able to protect the protective layer, avoiding the protective layer being scratched by sand and gravel, and achieving the purpose of prolonging the service life of the protective layer.

[0018] Further, after the first buffer rib and the second buffer rib are erected, a plurality of cells are formed. A blocking column is arranged in each cell. The blocking column is fixedly connected to the protective layer, and the blocking column is used to prevent sand and gravel from getting stuck in the cell.

[0019] By adopting the above solution, the arrangement of the blocking column can prevent sand and gravel from entering the cell.

[0020] Further, a wear-resistant layer is wrapped on one side of each blocking column facing away from the protective layer.

[0021] Further, the thickness of the wear-resistant layer is higher than that of the second buffer rib.

[0022] By adopting the above solution, the height of the wear-resistant layer is higher than that of the second buffer rib. Therefore, when the pipe body is dragged and moved on the working surface, the wear-resistant layer rubs against the working surface, which can protect the second buffer rib.

[0023] Further, the wear-resistant layer includes a flat end and an arc end, and the flat end of the wear-resistant layer is fixedly connected to one end of the blocking column facing away from the protective layer.

[0024] By adopting the above solution, the wear-resistant layer is arranged in a hemispherical shape. When the pipe body is pulled and moved along the ground, the friction between the wear-resistant layer and the ground is reduced, which is convenient for pulling the pipe body to move on the working surface.

[0025] In summary, the present application has the following technical effects:

[0026] 1. By providing a thermal insulation layer and a protective layer, the thermal insulation layer can effectively insulate the pipe body, the protective layer can protect the thermal insulation layer, and the thermal insulation layer can insulate the medium conveyed in the pipe body, achieving the purpose of improving the thermal insulation effect of the pipe body and avoiding problems such as energy waste caused by heat dissipation or affecting the properties of the conveyed medium;

[0027] 2. By providing a moisture-proof layer, the aluminum foil composite tape is wound around the outside of the thermal insulation layer in a spiral structure. First, it is convenient to evenly distribute stress and can effectively improve the structural strength; second, the stress on the protective layer is evenly distributed, and the protective layer can be protected in all directions; moreover, the aluminum foil tape is directly rolled into a thin sheet from metallic aluminum, and its molecular structure is dense and has no air permeability. This dense structure makes it difficult for water molecules to penetrate, effectively preventing the intrusion of external moisture, and thus avoiding the deformation of the thermal insulation layer due to moisture absorption;

[0028] 3. By setting an air cushion layer, the first buffer rib and the second buffer rib form an elastic net, allowing for a certain amount of movement margin between the second buffer rib and the protective layer. When the pipe body is pulled to move along the working surface, the sand and gravel on the working surface fly onto the second buffer rib. After the second buffer rib is stressed, it will move towards the direction close to the first buffer rib, and then the second buffer rib will rebound the sand and gravel under its own elastic action, achieving the effect of rebounding the sand and gravel, thereby being able to protect the protective layer, preventing the sand and gravel from scratching the protective layer, and achieving the purpose of extending the service life of the protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a heat-insulating RTP pipe of the present application;

[0030] Figure 2 is a schematic structural diagram of the moisture-proof layer of the present application;

[0031] Figure 3 is a schematic structural diagram of the air cushion layer of the present application;

[0032] Figure 4 is a schematic structural diagram of the blocking column and the wear-resistant layer of the present application.

[0033] In the figure, 1, pipe body; 2, heat-insulating layer; 3, moisture-proof layer; 4, protective layer; 5, air cushion layer; 51, first buffer rib; 52, second buffer rib; 6, blocking column; 61, wear-resistant layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present application will be further described in detail below with reference to the accompanying drawings.

[0035] Refer to Figure 1 , a heat-insulating RTP pipe provided in this embodiment includes a pipe body 1 main body. The pipe body 1 main body sequentially includes an inner-layer thermoplastic layer, a reinforcing layer, and an outer-layer thermoplastic layer from the inside to the outside; a heat-insulating layer 2 is provided on the outside of the outer layer, and a protective layer 4 is provided on the outside of the heat-insulating layer 2. The protective layer 4 is used to protect the heat-insulating layer 2, and the heat-insulating layer 2 is used to insulate the medium flowing inside the pipe body 1.

[0036] Refer to Figure 1 , in this embodiment, the heat-insulating layer 2 is made of polyurethane foam material. The polyurethane foam is evenly sprayed on the surface of the outer layer and allowed to cure to make it closely adhere to the outer layer; the thermal conductivity of the polyurethane foam is very low, and it can effectively prevent the transfer of heat and reduce the loss of heat, thereby being able to insulate the medium flowing inside the pipe body 1.

[0037] Refer to Figure 1 - Figure 2A moisture-proof layer 3 is arranged on the outside of the insulation layer 2. In this embodiment, the moisture-proof layer 3 is an aluminum foil composite tape, which is spirally wound around the outside of the insulation layer 2. The aluminum foil composite tape is spirally wound around the outside of the insulation layer 2, which is convenient for evenly distributing stress and can effectively improve the structural strength. It can also make the outside of the insulation layer 2 evenly stressed, thereby achieving an all-round protection effect on the insulation layer 2; and the aluminum foil material has a tight structure, making it difficult for water molecules to penetrate, thereby effectively preventing the intrusion of external moisture, thereby preventing the insulation layer 2 from being damp and deformed.

[0038] Reference Figure 1 A protective layer 4 is arranged outside the moisture-proof layer 3. The protective layer 4 is fixedly connected to the moisture-proof layer 3. The protective layer 4 is made of polyethylene material. The polyethylene material has good flexibility, and can fit tightly to the surface of the moisture-proof layer 3 when protecting the moisture-proof layer 3, thereby providing all-round protection for the moisture-proof layer 3.

[0039] Reference Figure 1 and Figure 3 An air cushion layer 5 is arranged outside the moisture-proof layer 3, and the air cushion layer 5 includes a first buffer rib 51 and a second buffer rib 52. A plurality of first buffer ribs 51 are arranged, and the plurality of first buffer ribs 51 are evenly arranged in a circular shape to the surface of the protective layer 4 and are fixedly connected to the protective protective layer 4; a plurality of second buffer ribs 52 are arranged, and the second buffer ribs 52 and the first buffer ribs 51 are perpendicular to each other. The plurality of second buffer ribs 52 are evenly laid in a circular shape on the outside of the first buffer rib 51, and are all fixedly connected to the first buffer rib 51.

[0040] Reference Figure 3 Through the above arrangement, the first buffer rib 51 and the second buffer rib 52 form an elastic net, so that there is a certain amount of movement margin between the second buffer rib 52 and the protective layer 4. When the tube body 1 is pulled to move along the working surface, the sand and gravel on the working surface splash to the second buffer rib 52. After the second buffer rib 52 is subjected to the pressure of the sand and gravel, it will move toward the direction close to the first buffer rib 51, and then the second buffer rib 52 will rebound the sand and gravel under the action of its own elasticity; thus, the protective layer 4 can be protected to prevent the sand and gravel from scratching the protective layer 4, thereby achieving the purpose of prolonging the service life of the protective layer 4; in this embodiment, the first buffer rib 51 and the second buffer rib 52 are both made of rubber material.

[0041] Reference Figure 1 and Figure 3, after the first buffer rib 51 and the second buffer rib 52 are erected, a number of cells are formed. A blocking column 6 is arranged in each cell. The blocking column 6 is fixedly connected to the protective layer 4. The blocking column 6 is used to prevent sand and gravel from getting stuck in the cell. A wear-resistant layer 61 is wrapped around one side of each blocking column 6 facing away from the protective layer 4. In this embodiment, the blocking column 6 is made of rubber, and the wear-resistant layer 61 is made of high manganese steel. When high manganese steel is subjected to severe impact or friction, surface hardening will occur, and the hardness will increase significantly, so it has excellent wear resistance, and thus can protect the blocking column 6.

[0042] Referring to Figure 4 , the thickness of the wear-resistant layer 61 is higher than that of the second buffer rib 52. So when the pipe body 1 is dragged to move on the working surface, the wear-resistant layer 61 rubs against the working surface, which can avoid the second buffer rib 52 from being damaged after long-term friction with the working surface, and thus can extend the service life of the second buffer rib 52. The wear-resistant layer 61 includes a flat end and an arc end, that is, the wear-resistant layer 61 is in a hemispherical shape as a whole. Among them, the flat end of the wear-resistant layer 61 is fixedly connected to one end of the blocking column 6 facing away from the protective layer 4. Setting the wear-resistant layer 61 in a hemispherical shape reduces the friction between the wear-resistant layer 61 and the working surface, which is convenient for pulling the pipe body 1 to move on the working surface.

[0043] The implementation principle of an insulating RTP pipe in an embodiment of this application is as follows: By arranging an insulating layer 2 on the outer side of the pipe body 1, the thermal conductivity coefficient of the polyurethane foam is very low, which can effectively prevent the transfer of heat, reduce the loss of heat, and thus can insulate the medium flowing inside the pipe body 1. By arranging a moisture-proof layer 3 on the outer side of the insulating layer 2, the aluminum foil composite tape is wound around the insulating layer 2 in a spiral structure, which is convenient for evenly distributing stress, can effectively improve the structural strength, and the foil material structure is tight, making it difficult for water molecules to penetrate, so as to effectively prevent the intrusion of external moisture, and thus avoid the moisture-proof layer 2 from being deformed by moisture. By arranging a protective layer 4 on the outer side of the moisture-proof layer 3, the polyethylene material has good flexibility, so when protecting the moisture-proof layer 3, it can closely adhere to the surface of the moisture-proof layer 3, and thus provide all-round protection for the pipe body 1. By arranging an air cushion layer 5, the air cushion layer 5 forms an elastic net. When the pipe body 1 is pulled to move along the working surface, the sand and gravel on the working surface fly to the second buffer rib 52, and the second buffer rib 52 will move towards the direction close to the first buffer rib 51, and then the second buffer rib 52 will bounce the sand and gravel under its own elastic action, which can protect the protective layer 4 and improve the service life of the protective layer 4. Also, because the blocking column 6 is arranged, the blocking column 6 can prevent sand and gravel from getting stuck in the cells formed by the air cushion layer 5. Also, because the wear-resistant layer 61 is arranged, when the pipe body 1 is dragged to move on the working surface, the wear-resistant layer 61 rubs against the working surface, which can avoid the second buffer rib 52 from rubbing against the working surface, and thus can extend the service life of the second buffer rib 52.

[0044] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A heat-insulating RTP pipe, the RTP pipe body sequentially includes an inner thermoplastic layer, a reinforcing layer, and an outer thermoplastic layer from inside to outside, and is characterized in that: A heat insulation layer (2) is further provided on the outer side of the outer layer of the RTP pipe body, and a protective layer (4) is provided on the outer side of the heat insulation layer (2).

2. The heat-insulating RTP pipe according to claim 1, wherein: The material of the heat insulation layer (2) is polyurethane foam.

3. A heat-insulating RTP pipe according to claim 1, characterized in that: A moisture-proof layer (3) is provided between the heat insulation layer (2) and the protective layer (4).

4. The thermal insulation RTP pipe according to claim 3, characterized in that: The moisture-proof layer (3) is an aluminum foil composite tape, and the aluminum foil composite tape is spirally wound around the outer side of the heat insulation layer (2).

5. The heat-insulating RTP pipe according to claim 4, wherein: The protective layer (4) is made of polyethylene material.

6. The heat-insulating RTP pipe according to claim 1, wherein: An air cushion layer (5) is provided outside the protective layer (4). The air cushion layer (5) includes first buffer ribs (51) and second buffer ribs (52). A plurality of first buffer ribs (51) are provided, and the plurality of first buffer ribs (51) are evenly arranged in a circumferential shape on the surface of the protective layer (4) and fixedly connected to the protective layer (4); A plurality of second buffer ribs (52) are provided, the second buffer ribs (52) are perpendicular to the first buffer ribs (51), and the plurality of second buffer ribs (52) are evenly arranged in a circumferential shape on the outside of the first buffer ribs (51) and are fixedly connected to the first buffer ribs (51).

7. The thermal insulation RTP pipe according to claim 6, characterized in that: After the first buffer ribs (51) and the second buffer ribs (52) are arranged, a plurality of cells are formed, and a blocking column (6) is arranged in each cell. The blocking column (6) is fixedly connected to the protective layer (4), and the blocking column (6) is used to prevent sand and gravel from getting stuck in the cell.

8. A heat-insulating RTP pipe according to claim 7, characterized in that: A wear-resistant layer (61) is wrapped on one side of each blocking column (6) facing away from the protective layer (4).

9. A heat-insulating RTP pipe according to claim 8, wherein: The thickness of the wear-resistant layer (61) is higher than that of the second buffer rib (52).

10. A heat-insulating RTP pipe according to claim 9, characterized in that: The wear-resistant layer (61) includes a flat end and an arc end, and the flat end of the wear-resistant layer (61) is fixedly connected to one end of the blocking column (6) facing away from the protective layer (4).

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