High-temperature-resistant PE pipe

Abstract

The utility model relates to the technical field of PE pipes, and discloses a high-temperature-resistant PE pipe which sequentially comprises a high-temperature-resistant coating, a ceramic fiber layer, a first aluminum film layer, a PE base layer pipe, a second aluminum film layer and a polyurethane foam layer from inside to outside. The outer wall of the first aluminum film layer is provided with a first protrusion which extends and protrudes outwards relative to the radial direction of the first aluminum film layer. The inner wall of the second aluminum film layer is provided with second protrusions which extend and protrude inwards relative to the radial direction of the second aluminum film layer. According to the high-temperature-resistant PE pipe, under the dual effects of structural design and material selection, the high-temperature-resistant performance of a pipeline is effectively improved, meanwhile, good structural stability and heat insulation effect are kept, and the high-temperature-resistant PE pipe is better suitable for liquid conveying systems in various high-temperature environments and has wide application prospects.

Description

Technical Field

[0001] This utility model relates to the field of PE pipe technology, and in particular to a high-temperature resistant PE pipe. Background Technology

[0002] Currently, traditional PE pipes are widely used in various liquid transportation systems due to their good flexibility and corrosion resistance. However, the performance of PE materials deteriorates significantly under high-temperature environments, limiting their application in certain fields.

[0003] To overcome this deficiency, Chinese patent CN03239236.2 discloses a high-temperature resistant plastic pipe with a composite layer wall. The pipe wall consists of a PB outer layer and a PE or PP inner layer, which are then composited and solidified. The thickness of the PB outer layer is 30%-50% of the total pipe wall thickness. This composite layer wall, composed of a PB outer layer and a PE or PP inner layer, is co-extruded and solidified, and is used for transporting high-temperature fluids. However, because the pipe wall of this high-temperature resistant plastic pipe is composed of a PB outer layer and a PE or PP inner layer, its high-temperature resistance is still relatively poor. Under high-temperature environments, the performance of the PE material still deteriorates, failing to meet the requirements of liquid transport systems in various high-temperature environments. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of the prior art and provide a high-temperature resistant PE pipe.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A high-temperature resistant PE pipe includes a PE base layer pipe, which serves as the main structure of the pipe and provides basic strength and flexibility.

[0007] The first aluminum film layer covers the outer wall of the PE base pipe. Utilizing the high reflectivity of aluminum, it reduces heat transfer to the pipe interior, effectively preventing heat from entering the pipe and also preventing heat loss from the pipe interior, thus providing excellent high-temperature resistance. The outer wall of the first aluminum film layer has a first protrusion extending radially outward relative to the first aluminum film layer. This protrusion design increases the distance between the first aluminum film layer and the ceramic fiber layer, reducing their contact and providing good separation, effectively preventing heat from entering the pipe.

[0008] A ceramic fiber layer is wrapped around the outer wall of the first aluminum film layer; the ceramic fiber layer is designed to provide additional thermal protection for the pipeline with its excellent high temperature resistance, corrosion resistance and heat insulation properties.

[0009] A high-temperature resistant coating is applied to the outer wall of the ceramic fiber layer. The high-temperature resistant coating is made of special high-temperature resistant materials and can maintain stability under extreme high temperatures, preventing damage to the outer wall of the pipe due to high temperatures.

[0010] The second aluminum foil layer is tightly adhered to the inner wall of the PE base pipe. The principle of the second aluminum foil layer is the same as that of the first aluminum foil layer: utilizing the high reflectivity of aluminum to reduce heat transfer into the pipe, effectively preventing heat from entering the pipe and also preventing heat loss from the pipe, thus providing good high-temperature resistance. Combined with the first aluminum foil layer, it provides excellent protection for the PE base pipe, preventing damage from high temperatures and extending its lifespan. The inner wall of the second aluminum foil layer has a second protrusion extending radially inward relative to the second aluminum foil layer. This second protrusion increases the distance between the second aluminum foil layer and the polyurethane foam layer, reducing their contact and providing good separation, effectively preventing heat loss from the pipe.

[0011] A polyurethane foam layer is embedded in the inner wall of the second aluminum film layer. The polyurethane foam layer can effectively reduce heat transfer, thereby maintaining a stable temperature of the medium inside the pipeline, and has good thermal insulation and cushioning properties, providing additional heat insulation and shock absorption effects for the pipeline.

[0012] Furthermore, the first protrusion is a strip-shaped protrusion extending along the length of the first aluminum film layer; at least three of the first protrusions are evenly distributed around the central axis of the first aluminum film layer on the outer wall of the first aluminum film layer. The second protrusion is a strip-shaped protrusion extending along the length of the second aluminum film layer; at least three of the second protrusions are evenly distributed around the central axis of the second aluminum film layer on the inner wall of the second aluminum film layer. Designing the first and second protrusions as strip-shaped protrusions reduces the contact between the first and second aluminum film layers and the ceramic fiber layer and the polyurethane foam layer, respectively, providing a good separation effect and effectively preventing heat loss from the pipe.

[0013] Furthermore, the number of the first protrusions is the same as the number of the second protrusions.

[0014] In another embodiment, the first protrusion is an annular protrusion structure; a plurality of the first protrusions are evenly spaced along the length direction of the first aluminum film layer. The second protrusion is an annular protrusion structure; a plurality of the second protrusions are evenly spaced along the length direction of the second aluminum film layer. Designing the first and second protrusions as annular protrusion structures can also reduce the contact between the first and second aluminum film layers and the ceramic fiber layer and the polyurethane foam layer, respectively, thus providing a good separation effect and effectively preventing heat loss from the pipe.

[0015] Furthermore, in order to better prevent heat from entering the pipe and achieve good high-temperature resistance, the wall thickness of the first aluminum film layer is greater than that of the second aluminum film layer.

[0016] Furthermore, the high-temperature resistant coating is an organosilicon high-temperature resistant paint layer. Organosilicon high-temperature resistant paint layer is a high-performance coating that provides effective corrosion protection in extreme high-temperature environments, maintains stability under extreme temperatures, and prevents damage to the outer wall of the pipeline due to high temperatures.

[0017] Furthermore, the ceramic fiber layer is a silicon carbide fiber layer, a silicon nitride fiber layer, a silicon carbon nitride fiber layer, or an aluminum silicate fiber layer. Appropriate selection of the specific type of ceramic fiber layer according to requirements can achieve excellent high-temperature resistance and provide additional thermal protection for the pipeline.

[0018] Furthermore, in order to ensure that the PE base layer pipe, as the main structure of the pipeline, has sufficient supporting strength, the wall thickness of the PE base layer pipe accounts for 30%-50% of the total wall thickness of the pipeline.

[0019] Compared with existing technologies, this utility model has the following advantages:

[0020] This utility model combines a high-temperature resistant coating, a ceramic fiber layer, a first aluminum film layer, a PE base pipe, a second aluminum film layer, and a polyurethane foam layer from the outside to the inside. First and second protrusions are respectively provided on the outer wall of the first aluminum film layer and the inner wall of the second aluminum film layer, thus providing effective separation. Through the combined effects of structural design and material selection, the high-temperature resistance of the pipeline is effectively improved, while maintaining good structural stability and insulation performance. It is better suited for liquid transportation systems in various high-temperature environments and has broad application prospects. Attached Figure Description

[0021] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a three-dimensional structural diagram of the misaligned disassembly of the high-temperature resistant PE pipe according to Embodiment 1 of this utility model.

[0023] Figure 2 This is a three-dimensional structural diagram of the high-temperature resistant PE pipe of Embodiment 1 of this utility model.

[0024] Figure 3 This is a three-dimensional structural diagram of the first aluminum film layer in Embodiment 1 of this utility model.

[0025] Figure 4 This is a three-dimensional structural diagram of the second aluminum film layer in Embodiment 1 of this utility model.

[0026] Figure 5 This is a three-dimensional structural diagram of the misaligned disassembly of the high-temperature resistant PE pipe according to Embodiment 2 of this utility model.

[0027] Figure 6 This is a three-dimensional structural diagram of the first aluminum film layer in Embodiment 2 of this utility model.

[0028] Figure 7 This is a three-dimensional structural diagram of the second aluminum film layer in Embodiment 2 of this utility model.

[0029] The image includes:

[0030] 1. High-temperature resistant coating; 2. Ceramic fiber layer; 3. First aluminum film layer; 4. First protrusion; 5. PE base tube; 6. Second aluminum film layer; 7. Second protrusion; 8. Polyurethane foam layer. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0032] Example 1:

[0033] like Figures 1 to 4As shown, a high-temperature resistant PE pipe includes a high-temperature resistant coating 1, a ceramic fiber layer 2, a first aluminum film layer 3, a PE base pipe 4, a second aluminum film layer 5, and a polyurethane foam layer 6. The PE base pipe 4 serves as the main structure of the pipe, providing basic strength and flexibility. The first aluminum film layer 3 covers the outer wall of the PE base pipe 4; utilizing the high reflectivity of aluminum reduces heat transfer to the pipe interior, effectively preventing heat from entering the pipe and also preventing heat loss from the pipe interior, thus providing good high-temperature resistance. The outer wall of the first aluminum film layer 3 has a first protrusion 31 extending radially outward relative to the first aluminum film layer 3; the design of the first protrusion 31 increases the distance between the first aluminum film layer 3 and the ceramic fiber layer 2, reducing their contact and providing good separation, effectively preventing heat from entering the pipe. The ceramic fiber layer 2 covers the outer wall of the first aluminum film layer 3; the design of the ceramic fiber layer 2, with its excellent high-temperature resistance, corrosion resistance, and thermal insulation properties, provides additional thermal protection for the pipe. A high-temperature resistant coating 1 is applied to the outer wall of the ceramic fiber layer 2. The high-temperature resistant coating 1 is made of a special high-temperature resistant material, which can maintain stability under extreme high temperatures and prevent damage to the outer wall of the pipe due to high temperatures. A second aluminum film layer 5 is fitted tightly to the inner wall of the PE base pipe 4. The principle of the second aluminum film layer 5 is the same as that of the first aluminum film layer 3; both utilize the high reflectivity of aluminum to reduce heat transfer to the inside of the pipe, effectively preventing heat from entering the pipe and also preventing heat loss from the pipe, thus providing good high-temperature resistance. Combined with the first aluminum film layer 3, it provides good protection for the PE base pipe 4, preventing damage from high temperatures and extending its lifespan. The inner wall of the second aluminum film layer 5 has a second protrusion 51 extending inward in the radial direction relative to the second aluminum film layer 5. The design of the second protrusion 51 increases the distance between the second aluminum film layer 5 and the polyurethane foam layer 6, reducing the contact between them and providing good separation, effectively preventing heat loss from the pipe. The polyurethane foam layer 6 is embedded in the inner wall of the second aluminum film layer 5. The polyurethane foam layer 6 can effectively reduce heat transfer, thereby maintaining the stable temperature of the medium in the pipeline, and has good thermal insulation and buffering properties, providing additional thermal insulation and shock absorption effects for the pipeline.

[0034] In this embodiment, the first protrusion 31 is a strip-shaped protrusion extending along the length of the first aluminum film layer 3; at least three of the first protrusions 31 are evenly distributed around the central axis of the first aluminum film layer 3 on the outer wall of the first aluminum film layer 3. The second protrusion 51 is a strip-shaped protrusion extending along the length of the second aluminum film layer 5; at least three of the second protrusions 51 are evenly distributed around the central axis of the second aluminum film layer 5 on the inner wall of the second aluminum film layer 5. Designing the first protrusion 31 and the second protrusion 51 as strip-shaped protrusions reduces the contact between the first aluminum film layer 3 and the second aluminum film layer 5 and the ceramic fiber layer 2 and the polyurethane foam layer 6, respectively, thus providing a good separation effect and effectively preventing heat loss from the pipe.

[0035] Preferably, the number of first protrusions 31 is the same as the number of second protrusions 51, which simplifies the design. Of course, the number of first protrusions 31 and the number of second protrusions 51 can also be designed reasonably according to requirements.

[0036] In order to better prevent heat from entering the pipe and to achieve good high-temperature resistance, the wall thickness of the first aluminum film layer 3 is greater than the wall thickness of the second aluminum film layer 5.

[0037] In this embodiment, in other aspects, the high-temperature resistant coating 1 is an organosilicon high-temperature resistant paint layer. The organosilicon high-temperature resistant paint layer is a high-performance coating that provides effective corrosion protection in extreme high-temperature environments, maintains stability under extreme temperatures, and prevents damage to the outer wall of the pipeline due to high temperatures. The ceramic fiber layer 2 is a silicon carbide fiber layer, a silicon nitride fiber layer, a silicon carbon nitride fiber layer, or an aluminum silicate fiber layer. Appropriately selecting the specific type of ceramic fiber layer 2 according to requirements can result in excellent high-temperature resistance, providing additional thermal protection for the pipeline.

[0038] In order to ensure that the PE base pipe 4, as the main structure of the pipeline, has sufficient supporting strength, the wall thickness of the PE base pipe 4 accounts for 30%-50% of the total wall thickness of the pipeline.

[0039] Example 2:

[0040] In this embodiment, if Figures 5 to 7As shown, the high-temperature resistant PE pipe of Example 2 is basically the same as that of Example 1, except that the first protrusion 31 is an annular protrusion structure; several first protrusions 31 are evenly spaced along the length direction of the first aluminum film layer 3. The second protrusion 51 is an annular protrusion structure; several second protrusions 51 are evenly spaced along the length direction of the second aluminum film layer 5. Designing the first protrusion 31 and the second protrusion 51 as an annular protrusion structure can also reduce the contact between the first aluminum film layer 3 and the second aluminum film layer 5 and the ceramic fiber layer 2 and the polyurethane foam layer 6, respectively, thus playing a good separating role and effectively preventing heat loss from the pipe.

[0041] In summary, this utility model embodiment provides a high-temperature resistant PE pipe, wherein the high-temperature resistant PE pipe is composed of a high-temperature resistant coating 1, a ceramic fiber layer 2, a first aluminum film layer 3, a PE base pipe 4, a second aluminum film layer 5, and a polyurethane foam layer 6 arranged sequentially from the outside to the inside. A first protrusion 31 and a second protrusion 51 are respectively provided on the outer wall of the first aluminum film layer 3 and the inner wall of the second aluminum film layer 5, thereby providing a good separation function. Through the combined effects of structural design and material selection, the high-temperature resistance of the pipe is effectively improved, while maintaining good structural stability and insulation effect. It is better suited for liquid transportation systems in various high-temperature environments and has broad application prospects.

[0042] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A high-temperature resistant PE pipe, comprising a PE base layer pipe, characterized in that, A first aluminum film layer is applied to the outer wall of the PE base tube; the outer wall of the first aluminum film layer is provided with a first protrusion that extends outward in the radial direction relative to the first aluminum film layer. A ceramic fiber layer is coated on the outer wall of the first aluminum film layer; A high-temperature resistant coating is applied to the outer wall of the ceramic fiber layer; The second aluminum film layer is adapted to be tightly attached to the inner wall of the PE base tube; the inner wall of the second aluminum film layer is provided with a second protrusion that extends inward in the radial direction relative to the second aluminum film layer; A polyurethane foam layer is embedded in the inner wall of the second aluminum film layer.

2. The high-temperature resistant PE pipe according to claim 1, characterized in that, The first protrusion is a strip-shaped protrusion extending along the length of the first aluminum film layer; at least three of the first protrusions are evenly distributed around the central axis of the first aluminum film layer on the outer wall of the first aluminum film layer.

3. The high-temperature resistant PE pipe according to claim 1 or 2, characterized in that, The second protrusion is a strip-shaped protrusion extending along the length of the second aluminum film layer; at least three of the second protrusions are evenly distributed around the central axis of the second aluminum film layer on the inner wall of the second aluminum film layer.

4. The high-temperature resistant PE pipe according to claim 1, characterized in that, The number of the first protrusion is the same as the number of the second protrusion.

5. The high-temperature resistant PE pipe according to claim 1, characterized in that, The first protrusion is an annular protrusion structure; a plurality of the first protrusions are evenly spaced and arranged along the length of the first aluminum film layer.

6. The high-temperature resistant PE pipe according to claim 1 or 5, characterized in that, The second protrusion is an annular protrusion structure; a plurality of the second protrusions are evenly spaced and arranged along the length of the second aluminum film layer.

7. The high-temperature resistant PE pipe according to claim 1, characterized in that, The wall thickness of the first aluminum film layer is greater than the wall thickness of the second aluminum film layer.

8. The high-temperature resistant PE pipe according to claim 1, characterized in that, The high-temperature resistant coating is an organosilicon high-temperature resistant paint layer.

9. The high-temperature resistant PE pipe according to claim 1 or 8, characterized in that, The ceramic fiber layer is a silicon carbide fiber layer, a silicon nitride fiber layer, a silicon carbon nitride fiber layer, or an aluminum silicate fiber layer.

10. The high-temperature resistant PE pipe according to claim 1, characterized in that, The wall thickness of the PE base layer pipe accounts for 30%-50% of the total pipe wall thickness.

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