Aerogel steam thermal insulation pipeline

Abstract

The utility model discloses an aerogel steam heat preservation pipeline, which relates to the technical field of high-temperature pipeline heat preservation and comprises a working pipe, an elastic supporting structure, a gradient heat preservation layer, a reflection buffering heat preservation layer and an outer protection pipe which are sequentially arranged from the inner side to the outer side. The section, on the circumferential face of the working pipe, of the elastic supporting structure is of a wave-shaped structure. According to the aerogel steam heat preservation pipeline, the elastic supporting structure is composed of the wave-shaped elastic steel sheets, the inner supporting layer and the outer supporting layer, the mechanical supporting effect is achieved through the design, and the impact strength at the low temperature is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature pipeline insulation technology, and in particular to an aerogel steam insulation pipeline. Background Technology

[0002] In existing patent CN215831413U, a nano-aerogel vapor insulation pipe is disclosed, comprising, from the inside out, an inner tube, an anti-corrosion layer, a first aerogel insulation layer, an inner reflective layer, a first elastic layer, a second elastic layer, a second aerogel insulation layer, an outer reflective layer, and a protective outer tube. The outer wall of the first elastic layer has several inner protrusions, each with an inner air bubble. The inner wall of the second elastic layer has several outer protrusions, each with an outer air bubble. The inner and outer protrusions are staggered and press against each other. However, this technical solution suffers from a lack of mechanical support in the insulation layer, resulting in insufficient impact resistance. Utility Model Content

[0003] The purpose of this utility model is to provide an aerogel steam insulation pipe that solves the defects of the comparative patent mentioned in the background art, which has the problem that the aerogel layer lacks mechanical support and has insufficient impact resistance.

[0004] The present invention adopts the following technical solution:

[0005] This utility model discloses an aerogel steam insulation pipe, which includes a working pipe, an elastic support structure, a gradient insulation layer, a reflective buffer insulation layer, and an outer protective pipe arranged sequentially from the inside to the outside; the elastic support structure has a wavy cross-section on the circumferential surface of the working pipe.

[0006] Preferably, the gradient insulation layer includes an inner transition layer and an outer insulation layer connected together, the inner wall of the inner transition layer is connected to the outer wall of the elastic support structure, and the outer wall of the outer insulation layer is connected to the reflective buffer insulation layer.

[0007] Preferably, the elastic support structure includes a corrugated elastic steel sheet, with an inner support layer on the side of the corrugated elastic steel sheet facing the working tube and an outer support layer on the side of the corrugated elastic steel sheet away from the working tube.

[0008] Preferably, a plurality of pre-embedded carbon fiber connecting columns are provided on the outer support layer, the corrugated elastic steel sheet and the inner support layer located at the crest position. The bottom end of the pre-embedded carbon fiber connecting column is located in the inner support layer, and the top end of the pre-embedded carbon fiber connecting column passes through the outer support layer and is inserted into the inner transition layer.

[0009] Preferably, the inner support layer has a plurality of hemispherical protrusions on the surface that contacts the working tube.

[0010] Preferably, the reflective buffer insulation layer comprises aluminum foil and aluminum silicate fiber felt, and the reflective buffer insulation layer is a multi-layer structure in which the aluminum foil and the aluminum silicate fiber felt are alternately stacked, and the outermost and innermost layers of the reflective buffer insulation layer are both aluminum silicate fiber felt.

[0011] Preferably, the aluminum foil has a wavy cross-section on the circumferential surface of the working pipe.

[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0013] This utility model provides an aerogel steam insulation pipe with an elastic support structure. The design of corrugated elastic steel sheets with inner and outer support layers provides mechanical support, which greatly improves the impact resistance. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a cross-sectional view of the aerogel steam insulation pipe of this utility model;

[0016] Figure 2 This is the longitudinal section of the aerogel steam insulation pipe of this utility model along the pipe's direction. Figure 1 ;

[0017] Figure 3 This is a cross-sectional view of the elastic support structure in the aerogel steam insulation pipe of this utility model.

[0018] Figure 4 This is a cross-sectional view of the reflective buffer insulation layer in the aerogel steam insulation pipe of this utility model;

[0019] Figure 5 This is the longitudinal section of the aerogel steam insulation pipe of this utility model along the pipe's direction. Figure 2 ;

[0020] Figure 6 This is the longitudinal section of the aerogel steam insulation pipe of this utility model along the pipe's direction. Figure 3 .

[0021] Explanation of reference numerals in the attached drawings: 1. Working pipe; 2. Elastic support structure; 2-1. Corrugated elastic steel sheet; 2-2. Inner support layer; 2-2-1. Hemispherical protrusion; 2-3. Outer support layer; 2-4. Embedded carbon fiber connecting column; 3. Gradient insulation layer; 3-1. Inner transition layer; 3-2. Outer insulation layer; 4. Reflective buffer insulation layer; 4-1. Aluminum silicate fiber felt; 4-2. Aluminum foil; 5. Outer protective pipe. Detailed Implementation

[0022] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 and Figure 2 As shown, this embodiment discloses an aerogel vapor insulation pipe, comprising a working pipe 1, an elastic support structure 2, a gradient insulation layer 3, a reflective buffer insulation layer 4, and an outer protective pipe 5 arranged sequentially from the inside to the outside. The elastic support structure 2 has a corrugated cross-section on the circumferential surface of the working pipe 1.

[0024] The gradient insulation layer 3 includes an inner transition layer 3-1 and an outer insulation layer 3-2 connected together. The inner wall of the inner transition layer 3-1 is connected to the outer wall of the elastic support structure 2, and the outer wall of the outer insulation layer 3-2 is connected to the reflective buffer insulation layer 4.

[0025] In this embodiment, the inner transition layer 3-1 is an aluminum silicate fiber felt layer, and the outer heat insulation layer 3-2 is an aerogel insulation blanket layer.

[0026] like Figure 3 As shown, the elastic support structure 2 includes a corrugated elastic steel sheet 2-1. An inner support layer 2-2 is provided on the side of the corrugated elastic steel sheet 2-1 facing the working pipe 1, and an outer support layer 2-3 is provided on the side of the corrugated elastic steel sheet 2-1 away from the working pipe 1. The design of the corrugated steel sheet plus the inner and outer support layers in the elastic support structure 2 greatly improves its impact resistance.

[0027] In this embodiment, the thickness of the corrugated elastic steel sheet 2-1 is 0.5 to 1 mm, and the crest spacing is 10 to 15 mm.

[0028] Several pre-embedded carbon fiber connecting columns 2-4 are installed on the outer support layer 2-3, the corrugated elastic steel sheet 2-1, and the inner support layer 2-2 located at the crest of the wave. The bottom end of the pre-embedded carbon fiber connecting column 2-4 is located inside the inner support layer 2-2, and the top end of the pre-embedded carbon fiber connecting column 2-4 passes through the outer support layer 2-3 and inserts into the inner transition layer 3-1. Furthermore, an epoxy resin adhesive composite connection is added between the outer support layer 2-3 and the inner transition layer 3-1, thereby connecting the two together by means of the pre-embedded carbon fiber connecting columns 2-4 and the epoxy resin adhesive.

[0029] In this embodiment, the pre-embedded carbon fiber connecting columns 2-4 have a diameter of 1.5 mm and a length of 5 mm.

[0030] The inner support layer 2-2 is made of graphene-modified rubber with a thickness of 0.3 mm. Multiple hemispherical protrusions 2-2-1 are provided on the surface of the inner support layer 2-2 that contacts the working tube 1 to increase friction. The hemispherical protrusions 2-2-1 have a diameter of 1 mm and are arranged at a spacing of 5 mm.

[0031] The outer support layer 2-3 is made of glass fiber reinforced epoxy resin material.

[0032] like Figure 4 As shown, the reflective buffer insulation layer 4 includes aluminum foil 4-2 and aluminum silicate fiber felt 4-1. The reflective buffer insulation layer 4 is a multi-layer structure in which aluminum foil 4-2 and aluminum silicate fiber felt 4-1 are alternately stacked and wound. That is, the outer side of the outer insulation layer 3-2 is first wound with a layer of aluminum silicate fiber felt 4-1, followed by a layer of aluminum foil 4-2, then another layer of aluminum silicate fiber felt 4-1, and so on. A silicone adhesive strip is provided between the aluminum foil 4-2 and the aluminum silicate fiber felt 4-1 for bonding. The outermost and innermost layers of the reflective buffer insulation layer 4 are both aluminum silicate fiber felt 4-1. At the same time, at least three layers of aluminum silicate fiber felt 4-1 and at least two layers of aluminum foil 4-2 are provided.

[0033] Among them, the cross-section of aluminum foil 4-2 on the circumferential surface of the working pipe 1 is a wavy structure. Aluminum foil 4-2 adopts a pre-pressed wavy structure with a wavelength of 5 to 8 mm and a wave height of 1 to 2 mm. The wavy pattern of aluminum foil 4-2 is located on the cross-section of the circumferential surface of the working pipe 1.

[0034] like Figure 5 As shown, at stress concentration locations (elbows, tees, reducers, fixed joints, etc.), the elastic support structure 2 is continuously distributed along the pipeline direction. Figure 6 As shown, in areas where stress is not concentrated (usually in straight pipe sections), the elastic support structure 2 is distributed intermittently along the pipe direction. The intermittent gaps are determined according to the actual situation and are not specifically limited.

[0035] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. Aerogel vapor thermal pipe, characterized by: The working pipe (1), the elastic support structure (2), the gradient heat preservation layer (3), the reflection buffer heat preservation layer (4) and the outer protective pipe (5) are sequentially arranged from the inner side to the outer side. The cross section of the elastic support structure (2) on the pipe circumferential surface of the working pipe (1) is a wave-shaped structure.

2. The aerogel thermal insulation pipe according to claim 1, wherein: The gradient heat preservation layer (3) comprises an inner transition layer (3-1) and an outer heat insulation layer (3-2) connected together, the inner wall of the inner transition layer (3-1) is connected with the outer wall of the elastic support structure (2), and the outer wall of the outer heat insulation layer (3-2) is connected with the reflection buffer heat preservation layer (4).

3. The aerogel vapor thermal pipe of claim 2, wherein: The elastic support structure (2) comprises a wave-shaped elastic steel sheet (2-1), one side of the wave-shaped elastic steel sheet (2-1) facing the working pipe (1) is provided with an inner support layer (2-2), and the other side of the wave-shaped elastic steel sheet (2-1) away from the working pipe (1) is provided with an outer support layer (2-3).

4. The aerogel thermal insulation vapor pipe according to claim 3, wherein: The outer support layer (2-3), the wave-shaped elastic steel sheet (2-1) and the inner support layer (2-2) are provided with a plurality of embedded carbon fiber connecting columns (2-4) at the wave crest positions, the bottom end of the embedded carbon fiber connecting column (2-4) is located in the inner support layer (2-2), and the top end of the embedded carbon fiber connecting column (2-4) is inserted into the inner transition layer (3-1) after penetrating through the outer support layer (2-3).

5. The aerogel thermal insulation vapor pipe according to claim 3, wherein: The inner support layer (2-2) is provided with a plurality of hemispherical convex points (2-2-1) on the surface in contact with the working pipe (1).

6. The aerogel thermal insulation pipe of claim 1, wherein: The reflection buffer heat preservation layer (4) comprises an aluminum foil (4-2) and an aluminum silicate fiber felt (4-1), the reflection buffer heat preservation layer (4) is a multi-layer structure of the aluminum foil (4-2) and the aluminum silicate fiber felt (4-1) alternately stacked, and the outermost and innermost layers of the reflection buffer heat preservation layer (4) are the aluminum silicate fiber felt (4-1).

7. The aerogel thermal insulation pipe according to claim 6, wherein: The cross section of the aluminum foil (4-2) on the pipe circumferential surface of the working pipe (1) is a wave-shaped structure.

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