Multi-layer composite steam pipeline heat preservation structure

Abstract

The utility model discloses a multi-layer composite type steam pipeline heat preservation structure which comprises a reflection heat insulation layer, a soft heat preservation layer, a hard supporting layer and a protection layer which are sequentially wrapped on a steam pipeline from inside to outside, the reflection heat insulation layer is composed of an aluminum foil composite film, and the light face of the reflection heat insulation layer faces the steam pipeline. The soft heat preservation layer comprises aerogel felt layers and aluminum silicate needled blanket layers which are arranged alternately. The heat radiation can be reflected directionally by arranging the light surface to face the steam pipeline, the heat radiation loss is remarkably reduced by combining the composite structure of the polyethylene film and the fiber braided fabric, and the overall heat insulation efficiency is improved; the aerogel felt layers and the aluminum silicate needled blanket layers are alternately arranged, a gradient heat insulation barrier is formed, the ultralow heat conduction performance is achieved, the structural stability in the high-temperature environment is guaranteed, the hard supporting layer is arranged and formed by splicing polyurethane tiles through concave grooves and protrusions, the installation process is simplified through modular design, and meanwhile the device adapts to expansion caused by heat and contraction caused by cold of a pipeline.

Description

Technical Field

[0001] This utility model relates to the field of steam pipeline technology, and in particular to a multi-layer composite steam pipeline insulation structure. Background Technology

[0002] Traditional steam pipe insulation structures often employ single or simple composite insulation materials, resulting in high heat loss rates, poor structural stability, and insufficient weather resistance. This leads to voids in the top of the insulation layer. For example, conventional reflective layers, due to improper material selection or poor adhesion, exhibit low heat radiation reflection efficiency. Soft insulation layers using only a single material (such as aluminum silicate fiber), while resistant to high temperatures, have high thermal conductivity, making them unsuitable for efficient insulation in ultra-low temperature environments. Rigid support layers with integral molding structures are complex to install and struggle to adapt to the thermal expansion and contraction of the pipes, easily leading to cracks. Protective layers relying solely on color steel plates have weak resistance to mechanical impact. Furthermore, existing technologies lack optimized designs for the synergistic effects of multiple materials, making it difficult to simultaneously achieve optimal insulation performance, structural strength, and durability. Utility Model Content

[0003] The main purpose of this utility model is to provide a multi-layer composite steam pipe insulation structure, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A multi-layer composite steam pipe insulation structure includes, from the inside out, a reflective insulation layer, a soft insulation layer, a rigid support layer, and a protective layer that are sequentially wrapped around the steam pipe. The reflective insulation layer is composed of an aluminum foil composite film with its smooth side facing the steam pipe. The soft insulation layer includes alternating layers of aerogel felt and aluminum silicate needled blanket. The rigid support layer is composed of several polyurethane tiles arranged sequentially, with mutually matching concave grooves and protrusions on both sides of each polyurethane tile. The protective layer includes a metal woven mesh and a color steel plate covering it.

[0006] Preferably, the reflective heat insulation layer is a hot-melt composite reflective heat insulation layer of aluminum foil, polyethylene film and fiber woven fabric.

[0007] Preferably, the aerogel felt layer and the aluminum silicate needled blanket layer are alternately arranged in at least 3 layers.

[0008] Preferably, reinforcing ribs are provided at equal intervals on the outer surface of several of the polyurethane tiles.

[0009] Preferably, a high-temperature resistant adhesive is provided between adjacent aerogel felt layers and aluminum silicate needled blanket layers.

[0010] Preferably, the metal woven mesh is a metal woven mesh with a 45° diagonal cross-woven structure made of 304 stainless steel wire.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. By setting the smooth surface facing the steam pipe, heat radiation can be reflected in a directional manner. Combined with the composite structure of polyethylene film and fiber woven fabric, heat radiation loss is significantly reduced and the overall heat insulation efficiency is improved. By alternating the aerogel felt layer and the aluminum silicate needled blanket layer, a gradient heat insulation barrier is formed, which not only achieves ultra-low thermal conductivity but also ensures structural stability under high temperature environment.

[0013] 2. By setting a rigid support layer, which is made of polyurethane tiles spliced ​​together with concave grooves and convex protrusions, the modular design simplifies the installation process and adapts to the thermal expansion and contraction deformation of the pipeline; the outer surface reinforcing ribs further enhance the ring stiffness and improve the compressive strength; the combination design of metal woven mesh and color steel plate enhances the resistance to mechanical impact and corrosion resistance, and extends the service life of the overall structure.

[0014] 3. By using a high-temperature resistant adhesive to tightly bond the aerogel felt layer and the aluminum silicate needled blanket layer, interlayer delamination is avoided, ensuring long-term stability; the dual structure of the protective layer effectively resists external physical damage and harsh weather conditions, reducing maintenance requirements. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a multi-layer composite steam pipeline insulation structure according to the present invention.

[0016] Figure 2 This is a front view schematic diagram of a multi-layer composite steam pipe insulation structure according to the present invention.

[0017] Figure 3 This utility model relates to a multi-layer composite steam pipe insulation structure. Figure 1 A magnified schematic diagram of the local structure at point A;

[0018] Figure 4 This is a three-dimensional structural diagram of a multi-layer composite steam pipe insulation structure polyurethane tile according to the present invention.

[0019] In the diagram: 1. Steam pipe, 2. Reflective insulation layer, 3. Soft insulation layer, 31. Aerogel felt layer, 32. Aluminum silicate needled blanket layer, 4. Rigid support layer, 41. Polyurethane tile, 42. Reinforcing rib, 43. Concave groove, 44. Protrusion, 5. Protective layer, 51. Metal woven mesh, 52. Color steel plate. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] like Figure 1-4 As shown, a multi-layer composite steam pipe insulation structure includes a reflective insulation layer 2, a soft insulation layer 3, a rigid support layer 4, and a protective layer 5, which are sequentially wrapped around the steam pipe 1 from the inside out. The reflective insulation layer 2 is composed of an aluminum foil composite film with its smooth side facing the steam pipe 1. The soft insulation layer 3 includes alternating layers of aerogel felt 31 and aluminum silicate needled blanket 32. The rigid support layer 4 is composed of several polyurethane tiles 41 arranged sequentially. The polyurethane tiles 41 have mutually compatible concave grooves 43 and protrusions 44 on both sides. The protective layer 5 includes a metal woven mesh 51 and a color steel plate 52 covering it.

[0022] In this embodiment, the reflective heat insulation layer 2 is a hot-melt composite reflective heat insulation layer made of aluminum foil, polyethylene film, and fiber woven fabric, with a thickness of 0.5mm-1.2mm. The reflective heat insulation layer 2 is set to achieve heat radiation shielding and tear resistance protection. The smooth side of the aluminum foil composite film, which is hot-melt composited with polyethylene film and fiber woven fabric, faces the steam pipe 1 to maximize reflection efficiency; the fiber woven fabric enhances the puncture resistance of the layer and reduces the thermal bridging effect when it is attached to the pipe surface.

[0023] In this embodiment, at least three layers of aerogel felt 31 and aluminum silicate needled blanket 32 ​​are alternately arranged, with a single layer thickness of 10mm-20mm. A soft insulation layer is provided to achieve gradient insulation of heat conduction and buffering of thermal stress. Aerogel felt 31: blocks heat conduction and convection through its nanoporous structure, adapting to minor deformations; aluminum silicate needled blanket 32: provides structural support at high temperatures and alleviates thermal expansion stress; the alternating layer design of at least three layers forms a continuous thermal insulation barrier, balancing flexibility and temperature resistance.

[0024] In this embodiment, several polyurethane tile blocks 41 are provided with reinforcing ribs 42 at equal intervals on their outer surfaces. The height of the reinforcing ribs is 5mm-8mm and the spacing is 100mm-150mm. A rigid support layer is provided to achieve mechanical load-bearing and deformation coordination. The concave grooves 43 and protrusions 44 of the polyurethane tile blocks 41 are seamlessly spliced, allowing axial displacement; the reinforcing ribs 42 are evenly distributed to disperse external loads and avoid local deformation.

[0025] In this embodiment, a high-temperature resistant adhesive is provided between the adjacent aerogel felt layer 31 and the aluminum silicate needled blanket layer 32, with a total thickness of 50mm-80mm.

[0026] In this embodiment, the metal woven mesh 51 is a 45° diagonally woven structure of 304 stainless steel wire with a mesh size of 10mm × 10mm. A protective layer 5 is provided to achieve impact resistance and weather protection. The metal woven mesh 51, made of 304 stainless steel wire with a diagonal cross-weave, serves as a flexible skeleton to resist external impacts. The color steel plate 52 covers the outer layer, and corrosion resistance, waterproofing, and ultraviolet shielding are achieved through coating and sealing processes.

[0027] Working Principle: By setting the smooth surface facing the steam pipe 1, heat radiation can be reflected in a directional manner. Combined with the composite structure of polyethylene film and fiber woven fabric, heat radiation loss is significantly reduced, improving overall heat insulation efficiency. The alternating arrangement of aerogel felt layer 31 and aluminum silicate needled blanket layer 32 forms a gradient heat insulation barrier, achieving both ultra-low thermal conductivity and structural stability under high-temperature environments. A rigid support layer 4 is set, which is composed of polyurethane tiles 41 spliced ​​together by concave grooves 43 and protrusions 44. The modular design simplifies the installation process and adapts to the thermal expansion and contraction deformation of the pipe. The outer surface reinforcing ribs 42 further enhance ring stiffness and improve compressive strength. The combined design of metal woven mesh 51 and color steel plate 52 enhances the resistance to mechanical impact and corrosion resistance, extending the service life of the overall structure. The aerogel felt layer 31 and aluminum silicate needled blanket layer 32 are tightly bonded with high-temperature resistant adhesive to prevent interlayer peeling and ensure long-term stability. The dual structure of the protective layer 5 effectively resists external physical damage and harsh weather conditions, reducing maintenance requirements.

[0028] The four-layer structure forms an integrated system of "reflection-barrier-support-protection": the reflective heat insulation layer (2) and the soft heat insulation layer (3) work together to reduce the overall heat transfer coefficient; the rigid support layer (4) and the protective layer (5) work together to ensure mechanical strength and environmental adaptability, adapting to wide temperature range conditions.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite steam pipe insulation structure, characterized in that: The steam pipe (1) is wrapped from the inside out with a reflective heat insulation layer (2), a soft heat insulation layer (3), a rigid support layer (4), and a protective layer (5). The reflective heat insulation layer (2) is made of aluminum foil composite film with its smooth side facing the steam pipe (1). The soft heat insulation layer (3) includes alternating layers of aerogel felt (31) and aluminum silicate needled blanket (32). The rigid support layer (4) is composed of several polyurethane tiles (41) arranged in sequence. The polyurethane tiles (41) have mutually compatible concave grooves (43) and protrusions (44) on both sides. The protective layer (5) includes a metal woven mesh (51) and a color steel plate (52) covering it.

2. The multi-layer composite steam pipe insulation structure according to claim 1, characterized in that: The reflective heat insulation layer (2) is a hot-melt composite reflective heat insulation layer of aluminum foil, polyethylene film and fiber woven fabric.

3. The multi-layer composite steam pipe insulation structure according to claim 1, characterized in that: The aerogel felt layer (31) and the aluminum silicate needled blanket layer (32) are alternately arranged in at least 3 layers.

4. The multi-layer composite steam pipe insulation structure according to claim 1, characterized in that: Several polyurethane tiles (41) have reinforcing ribs (42) evenly spaced on their outer surfaces.

5. The multi-layer composite steam pipe insulation structure according to claim 1, characterized in that: A high-temperature resistant adhesive is provided between the adjacent aerogel felt layer (31) and the aluminum silicate needled blanket layer (32).

6. The multi-layer composite steam pipe insulation structure according to claim 1, characterized in that: The metal woven mesh (51) is a metal woven mesh with a 45° oblique cross-woven structure made of 304 stainless steel wire.

Images