Novel heat preservation composite pipe

Abstract

The utility model provides a novel heat preservation composite pipe, and relates to the field of pipes. The device sequentially comprises an inner pipe, a first supporting frame, a steel pipe, a heat preservation layer, a second supporting frame and an outer pipe from inside to outside. The outer wall of the inner pipe is fixedly connected with one end of the first supporting frame, and the other end of the first supporting frame is fixedly connected with the inner wall of the steel pipe. One end of the second supporting frame is fixedly connected with the outer wall of the steel pipe, and the other end of the second supporting frame is fixedly connected with the inner wall of the outer pipe. The heat preservation layer adheres to the outer wall of the steel pipe, and a vacuum cavity is formed between the inner wall of the outer pipe and the outer wall of the steel pipe. The composite pipe has excellent heat preservation performance, corrosion resistance and compressive strength.

Description

Technical Field

[0001] This utility model relates to the field of pipes, and more specifically, to a novel thermal insulation composite pipe. Background Technology

[0002] Insulated pipes, also known as thermal insulation pipes, are essential pipelines specifically designed for transporting liquids, gases, and other media, minimizing heat loss during transport. They are widely used in the insulation and heat preservation of pipelines in industries such as petroleum, chemical, hot springs, district heating, central air conditioning, and municipal engineering. They effectively prevent heat loss when transporting high-temperature media, prevent liquid freezing inside the pipe at low temperatures, and prevent the intrusion of external cooling and humid air, thus reducing energy consumption.

[0003] Currently, most thermal insulation pipes need to be buried underground. In order to improve the strength of the thermal insulation pipes, the outermost part of most thermal insulation pipes is made of metal, which has poor corrosion resistance and high maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of thermal insulation composite pipe with excellent thermal insulation, corrosion resistance and compressive strength.

[0005] The technical problem solved by this utility model is achieved by the following technical solution.

[0006] This utility model provides a novel thermal insulation composite pipe, which includes, from the inside out, an inner pipe, a first support frame, a steel pipe, a thermal insulation layer, a second support frame, and an outer pipe. The outer wall of the inner pipe is fixedly connected to one end of the first support frame, and the other end of the first support frame is fixedly connected to the inner wall of the steel pipe. One end of the second support frame is fixedly connected to the outer wall of the steel pipe, and the other end of the second support frame is fixedly connected to the inner wall of the outer pipe. The thermal insulation layer is adhered to the outer wall of the steel pipe, and a vacuum cavity exists between the inner wall of the outer pipe and the outer wall of the steel pipe.

[0007] In some embodiments of this invention, the insulation layer is a porous polyurethane foam. The porous structure of polyurethane provides excellent thermal insulation performance. In this embodiment, the vacuum cavity and the insulation layer work synergistically, not only improving the thermal insulation performance of the composite pipe but also ensuring that the porous insulation layer continues to provide thermal insulation even after the vacuum cavity is destroyed.

[0008] In some embodiments of this utility model, the second support frame includes a radial support arranged along the radial direction of the steel pipe and a circumferential support arranged along the circumference of the steel pipe. A plurality of radial supports are spaced apart along the circumference of the steel pipe. One end of the radial support is fixedly connected to the outer wall of the steel pipe, and the other end of the radial support is fixedly connected to the inside of the outer pipe. The circumferential support is fixedly connected to the plurality of radial supports.

[0009] In some embodiments of this utility model, the inner tube and the outer tube are made of one of the following: fiberglass composite material, fiber resin-based composite material, or fiber-containing plastic.

[0010] In some embodiments of this utility model, the first support frame includes a large-diameter end and a small-diameter end, the large-diameter end being fixedly connected to the interior of the steel pipe, and the small-diameter end being fixedly connected to the outer wall of the inner pipe.

[0011] In some embodiments of this utility model, there are multiple first support frames, and multiple first support frames are arranged at intervals along the circumference of the inner tube to form support frame groups, and multiple support frame groups are arranged at intervals along the axial direction of the inner tube.

[0012] In some embodiments of this utility model, a vacuum cavity exists between the inner tube and the steel tube. By setting two vacuum cavity layers and one insulation layer, a triple insulation effect is achieved. In actual use, after the outermost vacuum air is broken, it becomes an air layer. The insulation layer and the inner vacuum cavity can still continue to function as an insulation pipe. Furthermore, the air layer has better insulation performance than the steel tube and the inner and outer tubes. Therefore, the composite pipe provided by this utility model, with its two vacuum cavity layers and one insulation layer, not only has excellent insulation properties but also extends the service life of the composite pipe and maintains long-term effective insulation.

[0013] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0014] The insulated pipe provided by this utility model has a vacuum cavity layer and an insulation layer set between the outer pipe and the steel pipe. Both have excellent heat insulation performance, improving the insulation performance of the composite pipe. Secondly, the setting of the first support frame and the second support frame can improve the strength of the composite pipe. The outer pipe set on the outer wall of the steel pipe can protect the steel pipe and prevent the steel pipe from direct contact with the outside air, soil and water vapor, thereby protecting the steel pipe and improving the corrosion resistance of the composite pipe.

[0015] In summary, the composite pipe of this invention has excellent thermal insulation, corrosion resistance and compressive strength. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a cross-sectional view of the insulation pipe according to an embodiment of the present utility model;

[0018] Figure 2 This is a longitudinal sectional view of the insulation pipe according to an embodiment of the present utility model;

[0019] Icons: 1-Inner tube, 2-First support frame, 3-Steel pipe, 4-Insulation layer, 5-Second support frame, 51-Radial support, 52-Circumferential support, 6-Outer tube. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to specific embodiments.

[0022] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0023] Example 1

[0024] Reference Appendix Figure 1-2 This utility model embodiment provides a novel thermal insulation composite pipe; from the inside to the outside, it includes an inner pipe 1, a first support frame 2, a steel pipe 3, a thermal insulation layer 4, a second support frame 5, and an outer pipe 6;

[0025] The first support frame 2 includes a large-diameter end and a small-diameter end. The large-diameter end is fixedly connected to the interior of the steel pipe 3, and the small-diameter end is fixedly connected to the outer wall of the inner pipe 1. There are multiple first support frames 2. Six first support frames 2 are arranged at intervals along the circumference of the inner pipe 1 to form a support frame group. Multiple support frame groups are arranged at intervals along the axial direction of the inner pipe 1. There is a vacuum cavity between the inner pipe 1 and the steel pipe 3, and the first support frame 2 is located in the vacuum cavity.

[0026] The second support frame 5 includes radial supports 51 arranged radially along the steel pipe 3 and circumferential supports 52 arranged circumferentially along the steel pipe 3. Six radial supports 51 are spaced apart circumferentially along the steel pipe 3. One end of each radial support 51 is fixedly connected to the outer wall of the steel pipe 3, and the other end is fixedly connected to the inside of the outer pipe 6. One circumferential support 52 is fixedly connected to the six radial supports 51 to form a support frame group. Multiple support frame groups are spaced apart axially along the steel pipe 3. A porous polyurethane foam insulation layer 4 is adhered to the outer wall of the steel pipe 3. The space between the inner wall of the outer pipe 6 and the outer wall of the steel pipe 3 is a vacuum cavity.

[0027] In this embodiment, the inner tube 1 and the outer tube 6 are both made of fiberglass composite material; the steel pipe 3 is made of cast iron; and the first support frame 2 and the second support frame 5 are both made of resin.

[0028] In summary, the thermal insulation pipe provided in this embodiment of the present invention has a vacuum cavity layer and a thermal insulation layer 4 between the outer pipe 6 and the steel pipe 3. Both have excellent thermal insulation performance, improving the thermal insulation performance of the composite pipe. Secondly, the first support frame 2 and the second support frame 5 can improve the strength of the composite pipe. The outer pipe 6, which is set on the outer wall of the steel pipe 3, can protect the steel pipe 3 and prevent the steel pipe 3 from direct contact with the outside air, soil, and water vapor, thereby protecting the steel pipe 3 and improving the corrosion resistance of the composite pipe.

[0029] The embodiments described above are some, but not all, embodiments of this utility model. The detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A novel thermal insulation composite pipe, characterized in that, From the inside out, it includes an inner tube, a first support frame, a steel pipe, an insulation layer, a second support frame, and an outer tube. The outer wall of the inner tube is fixedly connected to one end of the first support frame, and the other end of the first support frame is fixedly connected to the inner wall of the steel pipe. One end of the second support frame is fixedly connected to the outer wall of the steel pipe, and the other end of the second support frame is fixedly connected to the inner wall of the outer tube. The insulation layer is adhered to the outer wall of the steel pipe, and there is a vacuum cavity between the inner wall of the outer tube and the outer wall of the steel pipe.

2. The novel thermal insulation composite pipe according to claim 1, characterized in that, The insulation layer is a porous polyurethane foam.

3. The novel thermal insulation composite pipe according to claim 1, characterized in that, The second support frame includes radial supports arranged along the radial direction of the steel pipe and circumferential supports arranged along the circumference of the steel pipe. A plurality of radial supports are spaced apart along the circumference of the steel pipe. One end of the radial support is fixedly connected to the outer wall of the steel pipe, and the other end of the radial support is fixedly connected to the inside of the outer pipe. The circumferential supports are fixedly connected to the plurality of radial supports.

4. The novel thermal insulation composite pipe according to claim 1, characterized in that, The first support frame includes a large-diameter end and a small-diameter end. The large-diameter end is fixedly connected to the inside of the steel pipe, and the small-diameter end is fixedly connected to the outer wall of the inner pipe.

5. The novel thermal insulation composite pipe according to claim 1, characterized in that, There are multiple first support frames, and the multiple first support frames are arranged at intervals along the circumference of the inner tube to form support frame groups, and the multiple support frame groups are arranged at intervals along the axial direction of the inner tube.

6. The novel thermal insulation composite pipe according to claim 1, characterized in that, The space between the inner tube and the steel tube is a vacuum cavity.

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