Reflection thermal insulation layer for high-temperature steam thermal insulation pipe

Abstract

The utility model discloses a reflective thermal insulation layer for a high-temperature steam thermal insulation pipe, which comprises a steam pipeline and a reflective thermal insulation layer body coated on the outer side of the steam pipeline, the reflective thermal insulation layer body comprises a first stainless steel foil layer, a first ceramic fiber cloth layer, a granular thermal insulation material layer, a second ceramic fiber cloth layer and a second stainless steel foil layer which are sequentially arranged from inside to outside, and the granular thermal insulation material layer is formed by bonding hollow ceramic microbeads or nanopore aerogel particles. According to the reflective thermal insulation layer for the high-temperature steam thermal insulation pipe, the first stainless steel foil layer and the second stainless steel foil layer are arranged, so that the reflective thermal insulation layer can tolerate higher temperature, can be used for an ultrahigh-temperature steam thermal insulation pipeline, is in direct coating contact with the ultrahigh-temperature steam pipeline, and is not easy to damage; and one side of the first stainless steel foil layer and one side of the second stainless steel foil layer are smooth surfaces, so that the reflectivity is high, and the radiation heat dissipation loss can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam pipeline insulation, in particular to a reflective insulation layer for a high-temperature steam insulation pipe. Background Art

[0002] As cogeneration, central heating and steam supply projects in the thermal power and nuclear power fields continue to develop in the direction of high parameters and long distances, the requirements for the thermal insulation performance of steam pipelines are becoming higher and higher, and the structure of steam insulation pipes is constantly improving.

[0003] In the Chinese utility model publication number: CN209245581U, a long-distance heat transmission network steam pipeline is proposed, which is composed of a working pipe, a thermal insulation coating layer, a first thermal insulation layer, a first reflective layer, a second thermal insulation layer, a second reflective layer, a third thermal insulation layer and an outer sheath from the inside to the outside. The first reflective layer is a high-temperature resistant reflective layer, and the second reflective layer is a medium-temperature resistant reflective layer, both of which are composed of alkali-free glass fiber cloth and aluminum foil.

[0004] In the above disclosed content and other traditional insulation pipe structures, the reflective layer is coated outside the insulation layer. However, in the steam insulation pipe, the surface of the working pipe is the area with the highest temperature. The higher the temperature, the more heat is lost through radiation. Laying the reflective layer outside the insulation layer seriously weakens the effect of the reflective layer in blocking radiation heat dissipation. The reason is that the aluminum foil reflective layer, which is widely used at present, has poor high temperature resistance and cannot be used for a long time in high temperature occasions above 350°C; in addition, the strength of the aluminum foil is relatively low. When it is in direct contact with the working pipe, the working pipe moves due to thermal expansion and contraction, and friction occurs with the aluminum foil, thereby damaging the surface of the aluminum foil. Therefore, for high-temperature steam pipes with working temperatures above 350°C, there is an urgent need for a high-temperature resistant reflective layer to reduce the heat lost due to thermal radiation and improve the overall insulation effect and service life of the insulation pipe.

[0005] Therefore, it is necessary to propose a reflective insulation layer for high-temperature steam insulation pipe to solve the above problems. Utility Model Content

[0006] The main purpose of the utility model is to provide a reflective insulation layer for a high-temperature steam insulation pipe, which can effectively solve the problems in the background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A reflective insulation layer for a high-temperature steam insulation pipe comprises a steam pipe and a reflective insulation layer body coated on the outside of the steam pipe, wherein the reflective insulation layer body comprises a first stainless steel foil layer, a first ceramic fiber cloth layer, a granular insulation material layer, a second ceramic fiber cloth layer, and a second stainless steel foil layer, which are sequentially arranged from the inside to the outside, and the granular insulation material layer is formed by bonding hollow ceramic microbeads or nanoporous aerogel particles.

[0009] Preferably, the plurality of hollow ceramic microbeads or nanoporous aerogel particles constituting the particle-type thermal insulation material layer are bonded by a high-temperature adhesive, and then bonded to the first ceramic fiber cloth layer and the second ceramic fiber cloth layer by a high-temperature adhesive.

[0010] Preferably, the thickness of the reflective heat insulation layer body is 0.36mm-1.3mm;

[0011] The thickness of the first stainless steel foil layer and the second stainless steel foil layer is 0.01 mm-0.05 mm;

[0012] The thickness of the first ceramic fiber cloth layer and the second ceramic fiber cloth layer is 0.1 mm-0.25 mm;

[0013] The thickness of the granular heat-insulating material layer is 0.25 mm to 1.0 mm.

[0014] Preferably, the side of the first ceramic fiber cloth layer away from the granular thermal insulation material layer is closely attached to the first stainless steel foil layer and bonded with a high-temperature adhesive;

[0015] The side of the second ceramic fiber cloth layer away from the particle-type heat-insulating material layer is closely attached to the second stainless steel foil layer and bonded with a high-temperature adhesive.

[0016] Preferably, the side of the first stainless steel foil layer away from the granular heat insulation material layer is a smooth surface, and the side close to the granular heat insulation material layer is a rough surface;

[0017] The side of the second stainless steel foil layer close to the granular heat insulating material layer is a smooth surface, and the side away from the granular heat insulating material layer is a rough surface.

[0018] The outer side of the reflective heat insulation layer body is evenly bound with reinforcement wires, and the reinforcement wires are galvanized iron wires, preferably stainless steel wires.

[0019] Preferably, the outer side of the reflective heat insulation layer body is covered with a protective outer layer, and the protective outer layer is a color steel plate.

[0020] Beneficial Effects

[0021] Compared with the prior art, the utility model provides a reflective insulation layer for a high-temperature steam insulation pipe, which has the following beneficial effects:

[0022] 1. The reflective insulation layer for the high-temperature steam insulation pipe can withstand higher temperatures by setting the first stainless steel foil layer and the second stainless steel foil layer, and can be used for ultra-high temperature steam insulation pipes. It is directly covered and contacted with the ultra-high temperature steam pipes and is not easily damaged. One side of the first stainless steel foil layer and the second stainless steel foil layer are both smooth surfaces with high reflectivity, which can effectively reduce radiation heat dissipation losses.

[0023] 2. The reflective insulation layer of the high-temperature steam insulation pipe is a granular insulation material layer, which is hollow ceramic microbeads or aerogel nanoparticles as a granular high-temperature resistant insulation material. It can withstand ultra-high temperatures and has a low thermal conductivity, reduces heat conduction and convection heat transfer, and has a good insulation effect.

[0024] 3. The reflective insulation layer of the high-temperature steam insulation pipe, the first ceramic fiber cloth layer and the second ceramic fiber cloth layer have low thermal conductivity, high strength and good flexibility, and serve as the base material of the reflective insulation layer body, so that the reflective insulation layer body structure is easy to wrap around the steam pipe.

[0025] 4. The high-temperature steam insulation pipe uses a reflective insulation layer. The reinforcement wire is galvanized iron wire, which can further increase the stability of the reflective insulation layer body and play a secondary reinforcement. A protective outer layer is provided on the outermost layer, and the protective outer layer is a color steel plate, which not only increases the strength of the outermost side, avoids damage caused by foreign objects, but also increases the appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0028] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0029] In the figure: 1. steam pipe; 2. protective outer layer; 3. reinforcement wire; 4. first stainless steel foil layer; 5. first ceramic fiber cloth layer; 6. granular insulation material layer; 7. second ceramic fiber cloth layer; 8. second stainless steel foil layer. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figure 1-3As shown, a reflective insulation layer for a high-temperature steam insulation pipe comprises a steam pipe 1 and a reflective insulation layer body coated on the outside of the steam pipe 1, wherein the reflective insulation layer body comprises a first stainless steel foil layer 4, a first ceramic fiber cloth layer 5, a granular insulation material layer 6, a second ceramic fiber cloth layer 7, and a second stainless steel foil layer 8, which are sequentially arranged from the inside to the outside, and the granular insulation material layer 6 is formed by bonding hollow ceramic microbeads or nanoporous aerogel particles.

[0032] Furthermore, the plurality of hollow ceramic microbeads or nanoporous aerogel particles constituting the granular thermal insulation material layer 6 are bonded by a high-temperature adhesive, and after bonding, they are bonded to the first ceramic fiber cloth layer 5 and the second ceramic fiber cloth layer 7 by the high-temperature adhesive. Specifically, both sides of the first ceramic fiber cloth layer 5 and the second ceramic fiber cloth layer 7 are pre-impregnated with a high-temperature adhesive, the high-temperature adhesive is evenly mixed into the granular thermal insulation material layer 6, and then coated on the first ceramic fiber cloth layer 5 and the second ceramic fiber cloth layer 7, the first ceramic fiber cloth layer 5 and the second ceramic fiber cloth layer 7 pre-impregnated with a high-temperature adhesive and coated with the granular thermal insulation material layer 6 are bonded to the first stainless steel foil layer 4 and the second stainless steel foil layer 8, and are pressed by a roller press, and the edges of the reflective thermal insulation layer body are welded by laser welding, and then the reinforcing wire 3 is bundled, and the reinforcing wire 3 is a galvanized iron wire, preferably a stainless steel wire, which can further increase the firmness and play a secondary protection role.

[0033] Furthermore, the total thickness of the reflective insulation layer body is 0.36mm-1.3mm, the thickness of the first stainless steel foil layer 4 and the second stainless steel foil layer 8 is 0.01mm-0.05mm, the thickness of the first ceramic fiber cloth layer 5 and the second ceramic fiber cloth layer 7 is 0.1mm-0.25mm, and the thickness of the granular insulation material layer 6 is 0.25mm-1.0mm.

[0034] Furthermore, the side of the first stainless steel foil layer 4 away from the granular heat insulating material layer 6 is a smooth surface that has been finely polished to improve reflectivity, and the side close to the granular heat insulating material layer 6 is a rough surface that has been frosted to facilitate the first stainless steel foil layer 4 to be bonded to the first ceramic fiber cloth layer 5 through a high-temperature adhesive under pressure;

[0035] The side of the second stainless steel foil layer 8 close to the granular insulation material layer 6 is a smooth surface that has been finely polished to improve reflectivity, and the side away from the granular insulation material layer 6 is a rough surface that has been frosted to increase the friction coefficient with other materials or the reinforcing wire 3 .

[0036] In addition, the outer side of the reflective heat insulation layer body is covered with a protective outer layer 2, and the protective outer layer 2 is a color steel plate, which not only increases the aesthetics but also increases the strength of the outermost layer.

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A reflective heat insulation layer for a high-temperature steam insulation pipe, comprising a steam pipe (1) and a reflective heat insulation layer body wrapped around the outside of the steam pipe (1), characterized in that: The reflective heat-insulating layer body comprises a first stainless steel foil layer (4), a first ceramic fiber cloth layer (5), a granular heat-insulating material layer (6), a second ceramic fiber cloth layer (7), and a second stainless steel foil layer (8), which are arranged in sequence from the inside to the outside. The granular heat-insulating material layer (6) is formed by bonding hollow ceramic microbeads or nanoporous aerogel particles.

2. The reflective heat insulation layer for a high-temperature steam insulation pipe according to claim 1, characterized in that: The plurality of hollow ceramic microbeads or nanoporous aerogel particles constituting the particle-type heat-insulating material layer (6) are bonded together by a high-temperature adhesive, and after bonding, they are further bonded to the first ceramic fiber cloth layer (5) and the second ceramic fiber cloth layer (7) by a high-temperature adhesive.

3. The reflective heat insulation layer for a high-temperature steam insulation pipe according to claim 2, characterized in that: The thickness of the reflective heat insulation layer body is 0.36mm-1.3mm; The thickness of the first stainless steel foil layer (4) and the second stainless steel foil layer (8) is 0.01 mm-0.05 mm; The thickness of the first ceramic fiber cloth layer (5) and the second ceramic fiber cloth layer (7) is 0.1 mm-0.25 mm; The thickness of the granular heat-insulating material layer (6) is 0.25 mm to 1.0 mm.

4. The reflective heat insulation layer for a high-temperature steam insulation pipe according to claim 3, characterized in that: The side of the first ceramic fiber cloth layer (5) away from the granular heat insulation material layer (6) is tightly attached to the first stainless steel foil layer (4) and bonded with a high-temperature adhesive; The side of the second ceramic fiber cloth layer (7) away from the granular heat insulation material layer (6) is in close contact with the second stainless steel foil layer (8) and is bonded with a high-temperature adhesive.

5. The reflective heat insulation layer for a high-temperature steam insulation pipe according to claim 4, characterized in that: The side of the first stainless steel foil layer (4) away from the granular heat insulating material layer (6) is a smooth surface, and the side close to the granular heat insulating material layer (6) is a rough surface; The side of the second stainless steel foil layer (8) close to the granular heat insulating material layer (6) is a smooth surface, and the side away from the granular heat insulating material layer (6) is a rough surface.

6. The reflective heat insulation layer for a high-temperature steam insulation pipe according to claim 1, characterized in that: The outer side of the reflective heat insulation layer body is evenly bound with reinforcement wires (3), and the reinforcement wires (3) are galvanized iron wires.

7. The reflective heat insulation layer for a high-temperature steam insulation pipe according to claim 6, characterized in that: The outer side of the reflective heat insulation layer body is covered with a protective outer layer (2), and the protective outer layer (2) is a color steel plate.

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