Thermal insulation pipe

Abstract

The utility model provides a thermal insulation pipe, and particularly relates to the field of conveying pipelines. The heat preservation pipe comprises a heat preservation supporting layer, a plurality of heat preservation cores and a composite material layer, and the heat preservation supporting layer forms a tubular structure in a surrounding mode and is provided with a plurality of cavities extending in the axial direction. The multiple heat preservation cores correspond to the multiple cavities, and the corresponding cavities are filled with the heat preservation cores. The composite material layer is wound on the outer wall of the heat preservation supporting layer. According to the heat preservation pipe, the cavity of the heat preservation supporting layer is filled with the heat preservation core, medium heat loss can be reduced, the combination of the structural strength and the heat preservation function can be achieved, the weight of the heat preservation pipe is reduced, and transportation is convenient; and the structural strength of the thermal insulation pipe and the thermal insulation effect are enhanced, and the durability of the thermal insulation pipe is improved.

Description

Technical Field

[0001] The utility model relates to the field of conveying pipelines, in particular to a thermal insulation pipe. Background Art

[0002] High temperature resistant and corrosion resistant composite insulation pipes are widely used in the industrial field, especially in the discharge of hazardous waste liquids and the transportation of chemical agents. Most traditional high temperature resistant and corrosion resistant pipes adopt composite structures, such as polytetrafluoroethylene lining, steel pipe structure bushing and foam insulation layer arranged on the outside of the steel pipe structure bushing. This kind of composite insulation pipe has a reduced insulation effect because the metal bushing easily absorbs the heat of the conveying medium, and the insulation pipe is heavy and not convenient for transportation and installation. In addition, the foam insulation layer is easily damaged on the outermost side of the pipe structure, resulting in poor durability. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a thermal insulation pipe to improve the problems of poor thermal insulation effect and heavy weight of traditional thermal insulation pipes that are difficult to transport.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a thermal insulation pipe, which includes a thermal insulation support layer, a plurality of thermal insulation cores and a composite material layer. The thermal insulation support layer is surrounded to form a tubular structure and is provided with a plurality of cavities extending along the axial direction; the plurality of thermal insulation cores correspond to the plurality of cavities and are filled in the corresponding cavities; the composite material layer is wrapped around the outer wall of the thermal insulation support layer.

[0005] In one example of the utility model, the thermal insulation support layer includes a first wall body, a second wall body and a grid-like support layer arranged between the first wall body and the second wall body. The first wall body, the second wall body and the grid-like support layer all have annular cross-sections and are coaxially arranged. The first wall body, the second wall body and the grid-like support layer extend along the axial direction of the thermal insulation pipe.

[0006] In an example of the present invention, the first wall body, the second wall body and the grid-shaped supporting layer are integrally formed.

[0007] In an example of the present invention, the thickness of the grid-shaped support layer is 25-50 mm, and the volume density of the grid-shaped support layer is 15%-25%.

[0008] In an example of the present invention, the grid-shaped support layer includes a plurality of grid units, side walls of adjacent grid units overlap with each other, and the cavities are disposed on the plurality of grid units.

[0009] In an example of the present invention, the grid unit and the cavity are both triangular in radial cross-section along the thermal insulation pipe.

[0010] In an example of the present invention, the wall thickness of the grid unit is 1.2-1.5 mm.

[0011] In an example of the present invention, the composite material layer includes a matrix material and a reinforcing material, the matrix material is epoxy resin or epoxy vinyl resin, and the reinforcing material is glass fiber alkali-free woven cloth.

[0012] In an example of the present invention, the material of the thermal insulation support layer is polyetheretherketone.

[0013] In an example of the present invention, the inner diameter of the insulation pipe is 50 mm to 180 mm.

[0014] The insulation pipe provided by the utility model has a plurality of cavities arranged on the insulation support layer, and a plurality of insulation cores are filled in the plurality of cavities accordingly, which can not only reduce the heat loss of the medium, but also realize the combination of structural strength and insulation function, reduce the weight of the insulation pipe, and facilitate transportation. Furthermore, the composite material layer is wrapped around the outer wall of the insulation support layer, which not only prevents the external environment from eroding the insulation support layer, but also has the function of enhancing the structural strength and heat insulation of the insulation pipe, thereby improving the durability of the insulation pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic structural diagram of a thermal insulation pipe of the utility model in one embodiment;

[0017] Figure 2 It is a cross-sectional view of the thermal insulation pipe of the utility model in one embodiment;

[0018] Figure 3 It is a front view of the thermal insulation pipe of the utility model in one embodiment.

[0019] Component number description

[0020] 100, thermal insulation support layer; 110, first wall; 120, second wall; 130, grid support layer; 131, grid unit; 200, thermal insulation core; 300, composite material layer. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0022] In this article, when it comes to numerical ranges, unless otherwise specified, the distribution of optional values ​​within the numerical range is considered continuous and includes the two numerical endpoints (i.e., the minimum value and the maximum value) of the numerical range, as well as every value between the two numerical endpoints. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined.

[0023] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0024] See also Figures 1 to 3 The utility model provides a thermal insulation pipe, which includes a thermal insulation support layer 100, a plurality of thermal insulation cores 200 and a composite material layer 300. The thermal insulation support layer 100 is surrounded to form a tubular structure and is provided with a plurality of cavities extending in the axial direction. The plurality of thermal insulation cores 200 correspond to the plurality of cavities and are filled in the corresponding cavities. The composite material layer 300 is wound on the outer wall of the thermal insulation support layer 100. The thermal insulation pipe of the present application fills the plurality of thermal insulation cores 200 in the plurality of cavities of the thermal insulation support layer 100, which can not only reduce the heat loss of the medium and improve the thermal insulation effect, but also realize the combination of structural strength and thermal insulation function, reduce the weight of the thermal insulation pipe, and facilitate transportation. At the same time, it can ensure that the thermal insulation core 200 is not affected by the environment, and the thermal insulation material remains effective for a long time, thereby improving the life and thermal insulation effect of the thermal insulation core 200. In addition, the outer composite material layer 300 can effectively resist the erosion of various acid, alkali and salt harsh environments and the impact of external forces, greatly improving the durability of the pipe fittings.

[0025] See also Figures 1 to 3In this application, the size of the insulation pipe is adaptively adjusted according to actual needs. For example, the inner diameter of the insulation pipe is 50 mm to 180 mm, such as 50 mm, 100 mm, 150 mm or 180 mm. In one embodiment, the insulation support layer 100 includes a first wall body 110, a second wall body 120 and a grid-like support layer 130 disposed between the first wall body 110 and the second wall body 120. In this application, there is no restriction on the shapes of the first wall body 110, the second wall body 120 and the grid-like support layer 130, for example, they can be cubes, cylinders, cones, etc. The shapes of the first wall body 110, the second wall body 120 and the grid-like support layer 130 can be the same or different. In this embodiment, the first wall 110, the second wall 120 and the grid-like support layer 130 are all cylindrical, and the first wall 110, the second wall 120 and the grid-like support layer 130 are all annular cross-sections and are coaxially arranged. The first wall 110, the second wall 120 and the grid-like support layer 130 extend along the axial direction of the thermal insulation pipe. The thickness of the grid-like support layer 130 is adaptively adjusted according to actual needs. Exemplarily, the thickness of the grid-like support layer 130 is 25 to 50 mm, such as 25 mm, 35 mm, 40 mm, 45 mm or 50 mm. The thickness of the first wall 110 and the second wall 120 can be the same or different. In this embodiment, the thickness of the first wall 110 and the second wall 120 is the same. In the present application, the volume density of the grid-like support layer 130 is 15% to 25%, such as 15%, 20% or 25%. Furthermore, in order to reduce the flow resistance of the medium in the insulation pipe, the inner wall of the second wall 120 is smoothed, for example, the inner wall of the second wall 120 is chemically vaporized and polished to form a smooth and dense layer on the side of the second wall 120 that contacts the medium.

[0026] See also Figures 1 to 3 In one embodiment, the first wall body 110, the second wall body 120 and the grid-shaped support layer 130 are integrally formed, which is beneficial to enhancing the structural strength of the thermal insulation pipe. The preparation method of the thermal insulation support layer 100 is not limited here. For example, the thermal insulation support layer 100 can be manufactured by an integrated molding process of a 3D printing process or a pultrusion process. 3D printing converts a digital model into a physical object by adding materials layer by layer. The pultrusion process combines glass fiber or other reinforcing materials with a resin matrix through continuous impregnation, preforming, extrusion molding, curing, pulling and cutting steps to produce a lightweight, high-strength and smooth-surfaced composite material product. Both the 3D printing process and the pultrusion process can ensure the dimensional accuracy, mechanical properties and surface quality of the product.

[0027] Furthermore, in order to improve the service life of the insulation pipe, the insulation support layer 100 is made of corrosion-resistant material. Exemplarily, the material of the insulation support layer 100 is polyetheretherketone (PEEK), or fiber-reinforced PEEK, such as glass fiber reinforced PEEK, carbon fiber reinforced PEEK and other materials. The insulation support layer 100 can also be made of other polymer materials that are resistant to acid, alkali and salt corrosion and have a strength that meets the use requirements.

[0028] See also Figures 1 to 3 In one embodiment, the grid-like support layer 130 includes a plurality of grid units 131, the side walls of adjacent grid units 131 overlap each other, and a cavity is provided on the grid unit 131, and the cavity is provided along the length direction of the grid unit 131. In this embodiment, the radial cross-sections of the grid unit 131 and the cavity along the insulation pipe are both triangular, which is beneficial to enhancing the structural strength and rigidity of the grid unit 131, and can well withstand and disperse pressure, and can better resist deformation by external forces. In the present application, the wall thickness of the grid unit 131 is adaptively adjusted according to actual needs. Exemplarily, the wall thickness of the grid unit 131 is 1.2 mm to 1.5 mm, for example, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm.

[0029] See also Figures 1 to 3 In one embodiment, the insulation core 200 is formed by foaming a foam material. Exemplarily, the foam material is placed in a cavity, and foamed under appropriate conditions to fill the entire cavity to form the insulation core 200. In this embodiment, the material of the insulation core 200 is a modified polyurethane material. The polyurethane material has a low density, good thermal insulation effect, a large modulus, and a good filling and supporting effect, which can enhance the structural rigidity of the insulation pipe. The modified polyurethane material can be obtained by commercial means, and the foaming process can refer to the prior art, which will not be described here. In other embodiments, the material of the insulation core 200 can also be any other material that can be foamed and has good thermal insulation performance.

[0030] See also Figures 1 to 3 In one embodiment, the composite material layer 300 is wrapped around the outer wall of the thermal insulation support layer 100, which can not only prevent erosion from the external environment, but also has the function of enhancing the structural strength and thermal insulation of the thermal insulation pipe. In the present application, there is no restriction on the material of the composite material layer 300, as long as it can meet the requirements of corrosion protection, enhanced structural strength and thermal insulation. Exemplarily, the composite material layer 300 includes a matrix material and a composite material, the matrix material can be epoxy resin or epoxy vinyl resin, and the reinforcing material is glass fiber alkali-free lattice cloth. In the present application, the thickness of the composite material layer 300 is adaptively adjusted according to the diameter of the thermal insulation pipe. Exemplarily, the thickness of the composite material layer 300 is 3mm to 8mm, for example 3mm, 5mm or 8mm.

[0031] See also Figures 1 to 3, taking an insulation pipe with an inner diameter of 90mm as an example, the technical solution of the utility model is described in detail. The insulation pipe includes an insulation support layer 100, an insulation core 200 and a composite material layer 300. The insulation support layer 100 is provided with a cavity along its axial direction, and the insulation core 200 is arranged in the cavity. The material of the insulation support layer 100 is glass fiber reinforced polyetheretherketone, and the fiber filling content is 10% to 20%. The insulation support layer 100 includes a first wall body 110, a second wall body 120 and a grid support layer 130 arranged between the first wall body 110 and the second wall body 120. The insulation support layer 100 is manufactured by 3D printing technology. In this embodiment, the thickness of the first wall body 110 and the second wall body 120 is 5mm, the thickness of the grid support layer 130 is 30mm, and the volume density of the grid support layer 130 is 20%. The grid-like support layer 130 includes a plurality of grid units 131. The radial cross-sections of the grid units 131 and the cavities along the insulation pipe are both triangular, and the wall thickness of the grid units 131 is 1.5 mm. The main component of the insulation core 200 is a two-component polyurethane material, which is directly foamed in the cavity of the grid unit 131. The glass fiber reinforced composite material layer 300 is wrapped around the outer wall of the insulation support layer 100. The thickness of the composite material layer 300 is 5 mm. The composite material layer 300 is prepared from a base material and a reinforcing material. The base material is epoxy resin, and the reinforcing material is a glass fiber alkali-free lattice cloth with a surface density of 400 tex. The composite pipe fittings made using the above scheme have an effective temperature resistance of up to 310°C and are suitable for transporting high-temperature and highly corrosive media.

[0032] The raw materials and reagents used in this application can be obtained through commercial means, or can be prepared by conventional methods in the art.

[0033] The thermal insulation pipe provided by the utility model has a plurality of cavities arranged on the thermal insulation support layer, and a plurality of thermal insulation cores are filled in the plurality of cavities accordingly, which can not only reduce the heat loss of the medium, but also realize the combination of structural strength and thermal insulation function, reduce the weight of the thermal insulation pipe, and facilitate transportation. Furthermore, a composite material layer is wrapped around the outer wall of the thermal insulation support layer, which not only prevents the external environment from eroding the thermal insulation support layer, but also has the function of enhancing the structural strength and thermal insulation of the thermal insulation pipe, thereby improving the durability of the thermal insulation pipe. Therefore, the utility model effectively overcomes some practical problems in the prior art and thus has a high utilization value and use significance.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A thermal insulation pipe, characterized in that: include: A heat-insulating support layer, the heat-insulating support layer is surrounded to form a tubular structure and is provided with a plurality of cavities extending in the axial direction; A plurality of heat preservation cores corresponding to the plurality of cavities and filled in the corresponding cavities; A composite material layer is wound around the outer wall of the thermal insulation support layer.

2. The thermal insulation pipe according to claim 1, characterized in that: The thermal insulation support layer includes a first wall body, a second wall body and a grid-like support layer arranged between the first wall body and the second wall body. The first wall body, the second wall body and the grid-like support layer all have annular cross-sections and are coaxially arranged. The first wall body, the second wall body and the grid-like support layer extend along the axial direction of the thermal insulation pipe.

3. The thermal insulation pipe according to claim 2, characterized in that: The first wall body, the second wall body and the grid-shaped supporting layer are integrally formed.

4. The thermal insulation pipe according to claim 2, characterized in that: The thickness of the grid-shaped support layer is 25-50 mm, and the volume density of the grid-shaped support layer is 15%-25%.

5. The thermal insulation pipe according to claim 2, characterized in that: The grid-shaped support layer includes a plurality of grid units, the side walls of adjacent grid units overlap with each other, and the cavities are arranged on the plurality of grid units.

6. The thermal insulation pipe according to claim 5, characterized in that: The grid unit and the cavity are both triangular in radial cross-section along the thermal insulation pipe.

7. The thermal insulation pipe according to claim 5, characterized in that: The wall thickness of the grid unit is 1.2-1.5 mm.

8. The thermal insulation pipe according to claim 1, characterized in that: The composite material layer comprises a matrix material and a reinforcing material, wherein the matrix material is epoxy resin or epoxy vinyl resin, and the reinforcing material is glass fiber alkali-free woven fabric.

9. The thermal insulation pipe according to claim 1, characterized in that: The material of the thermal insulation support layer is polyetheretherketone.

10. The thermal insulation pipe according to claim 1, characterized in that: The inner diameter of the insulation pipe is 50 mm to 180 mm.

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