Integrated self-insulation pipe section for fire fighting pipeline and water supply pipeline

Abstract

The invention relates to the technical field of pipeline heat preservation, in particular to an integrated self-heat-preservation pipe section for a fire fighting pipeline and a water supply pipeline. The inner pipe body is used for conveying fluid; the heat preservation layer wraps the outer wall of the inner pipe body; the outermost side of the heat preservation layer is coated with the outer protection pipe; the inner pipe body, the heat preservation layer and the outer protection pipe are prefabricated and combined into an integral rigid composite pipe structure. An integral composite pipe structure prefabricated and formed in a factory is adopted, the inner pipe body, the heat preservation layer containing multiple layers of composite materials and the waterproof and mechanical shock resistant outer protection pipe are firmly combined, and the defects that a traditional outer covering heat preservation site is complex in construction, and the heat preservation layer is prone to being damaged are effectively overcome. The integrated structure is beneficial to improving the durability and reliability of the heat preservation layer, the outer layer protection structure can reduce the damage risk in the transportation and installation process, and the internal multi-layer heat preservation structure meets the fireproof requirement on the basis of meeting the heat preservation performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline heat preservation, in particular to an integrated self-heat preservation pipe section for fire-fighting pipelines and water supply pipelines. BACKGROUND

[0002] In the field of construction and municipal engineering, the heat preservation of fire-fighting and water supply pipelines is a key link to ensure the normal operation of the system, especially in cold regions, outdoor environments or non-heating spaces, where problems such as pipeline freeze cracking, condensation corrosion and heat loss are particularly prominent. For a long time, the traditional pipeline heat preservation method has many limitations in practical application.

[0003] The commonly used external heat preservation process requires wrapping the heat preservation material on site after the pipeline is installed and adding a protective layer, which has problems such as complicated process, dependence on manual work, long construction period, etc. Such heat preservation layers are prone to damage, deformation or water seepage during transportation, installation and use, resulting in a decrease in heat preservation performance, and it is difficult to maintain in the later period, especially for the pipeline that has been hidden. In addition, fire-fighting pipelines need to meet strict fireproofing requirements, which to some extent limits the selection range of heat preservation materials. Another electric heat tracing method has certain anti-freezing effect, but it has the disadvantages of high energy consumption, the need for a supporting electrical control system and potential safety risks.

[0004] Therefore, there is an urgent need for a new pipeline heat preservation structure that can fundamentally overcome the above-mentioned defects, achieve an effective balance between heat preservation performance, construction efficiency and long-term maintenance cost under the premise of meeting the safe and reliable operation of fire-fighting and water supply systems. SUMMARY

[0005] The present application aims to solve the above problems and provides an integrated self-heat preservation pipe section for fire-fighting pipelines and water supply pipelines, which is prefabricated in advance.

[0006] The present application solves the problem by adopting the following technical solution: An integrated self-heat preservation pipe section for fire-fighting pipelines and water supply pipelines, comprising: a fluid conveying inner pipe body, which is made of metal or plastic material; a heat preservation layer wrapped on the outer wall of the inner pipe body, the heat preservation layer comprising a first nanoporous aerogel composite material layer, a first metal thin-walled pipe, a heat insulation layer, a second metal thin-walled pipe and a second nanoporous aerogel composite material layer arranged in sequence from the inside to the outside; an outer protective pipe wrapped on the outermost side of the heat preservation layer, which is a pipe structure resistant to water and mechanical impact; the inner pipe body, the heat preservation layer and the outer protective pipe are prefabricated and combined into a rigid composite pipe structure.

[0007] The present application adopts the above technical solution, which has the following outstanding features compared with the prior art: The integrative composite pipe structure is prefabricated in the factory, and the inner pipe body, the heat preservation layer containing the multi-layer composite material, and the outer protective pipe against mechanical impact are firmly combined, which effectively overcomes the defects of the traditional outer covering heat preservation site construction being complicated and the heat preservation layer being easily damaged. The integrated structure helps to improve the durability and reliability of the heat preservation layer, the outer protective structure can reduce the damage risk in transportation and installation, the internal multi-layer heat preservation structure meets the heat preservation performance and takes into account the fireproofing requirement, avoids the energy consumption and safety hazards of the electric heat tracing method, and provides a more convenient construction and lower maintenance requirement anti-freezing and anti-condensation solution for the pipe system.

[0008] As preferred, the further technical scheme of the present application is: Further, the inner pipe body is a galvanized steel pipe, a stainless steel pipe, a polypropylene pipe, a high-temperature polyethylene pipe, or a chlorinated polyvinyl chloride pipe, the selection of such pipe materials helps to meet the differentiated requirements of pressure resistance, corrosion resistance, and temperature resistance in different fluid conveying scenarios, and improves the applicability and reliability of the pipe section in different application environments.

[0009] Further, the heat insulation layer is a rigid polyurethane foam layer or a vacuum heat insulation board core material layer, such material structure helps to improve the heat preservation performance, and the closed cell property can reduce the possibility of water penetration, which has a positive effect on maintaining long-term heat insulation effect.

[0010] Further, the rigid polyurethane foam layer is a flame-retardant polyurethane foam layer added with a flame retardant, which can further improve the fireproofing performance of the material, making it more suitable for fire-fighting pipeline scenarios with strict fireproofing requirements.

[0011] Further, the outer protective pipe is a high-density polyethylene pipe, a polypropylene pipe, or a polyvinyl chloride pipe, which can provide effective moisture protection and basic mechanical protection for the pipe section, and has certain environmental weather resistance.

[0012] Further, the outer protective pipe is a galvanized metal thin-walled pipe or a stainless steel thin-walled pipe, such metal material outer protective layer can provide more solid external protection for the pipe section, and its strong mechanical strength helps to resist external impact, while having good durability. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a top view cross-sectional structure schematic diagram of the embodiment of the present application; Figure 2 is a front view cross-sectional structure schematic diagram of the embodiment of the present application; In the figure, the marks are: inner pipe body 1, first nano-porous aerogel composite material layer 2, first metal thin-walled pipe 3, heat insulation layer 4, second metal thin-walled pipe 5, second nano-porous aerogel composite material layer 6, outer protective pipe 7. DETAILED DESCRIPTION

[0014] The present application is further illustrated by the following examples, which are intended to better illustrate the present application and are not intended to limit the scope of the present application.

[0015] An integrated self-insulation pipe section for fire-fighting and water supply pipeline, comprising: An inner pipe body 1 for conveying fluid, the inner pipe body 1 is made of metal or plastic according to the pressure level and medium characteristics of the use scenario, the metal is selected from galvanized steel pipe and stainless steel pipe, and the plastic material is selected from high-performance plastics such as PP-R, PERT, PB, CPVC, etc.; An insulation layer is wrapped on the outer wall of the inner pipe body 1, the insulation layer comprises a first nanoporous aerogel composite material layer 2, a first metal thin-walled pipe 3, a heat insulation layer 4, a second metal thin-walled pipe 5 and a second nanoporous aerogel composite material layer 6 which are sequentially stacked from inside to outside, and are combined with the inner pipe body 1 by processes such as continuous extrusion wrapping, injection foaming or mold pressing. The first nanoporous aerogel composite material layer 2 is directly wrapped on the outer wall of the inner pipe body 1, and its low thermal conductivity can effectively block the transfer of internal temperature to the outside, reducing the heat bridge effect. The first metal thin-walled pipe 3 not only provides support and protection for the first nanoporous aerogel composite material layer 2, but also plays a role in heat redistribution, improving temperature uniformity. The intermediate heat insulation layer 4 is made of a closed-cell structure material, which further enhances the overall insulation effect, and its water-repellent property can prevent water penetration. The second metal thin-walled pipe 5 forms a double-strengthened structure with the first metal thin-walled pipe 3, significantly improving the compression resistance and impact resistance of the pipe section. The outermost second nanoporous aerogel composite material layer 6 provides additional insulation effect. An outer protective pipe 7 is wrapped on the outermost side of the insulation layer, the outer protective pipe 7 is a pipe structure that is waterproof and resistant to mechanical impact, and is firmly combined with the insulation layer by co-extrusion, coating, sleeve hot melting / gluing and other methods. The inner pipe body 1, the insulation layer and the outer protective pipe 7 are pre-assembled into a rigid composite pipe structure as a whole.

[0016] Further, the inner pipe body 1 is a galvanized steel pipe, a stainless steel pipe, a polypropylene pipe, a high-temperature resistant polyethylene pipe or a chlorinated polyvinyl chloride pipe. The selection of pipe material helps to meet the differentiated requirements of pressure resistance, corrosion resistance and temperature resistance in different fluid conveying scenarios. For fire-fighting pipeline systems, galvanized steel pipes or stainless steel pipes can be used to meet the strength and fireproofing requirements. For water supply pipeline systems, engineering plastic pipes such as polypropylene (PP-R) pipes, high-temperature resistant polyethylene (PE-RT) pipes or chlorinated polyvinyl chloride (CPVC) pipes can be used. The pipe diameter and wall thickness of the inner pipe body 1 are determined according to the pressure bearing requirements of engineering design.

[0017] Further, the heat insulation layer 4 is a hard polyurethane foam layer or a vacuum insulation panel core material layer. Such materials can provide good insulation and heat insulation effect, and their closed-cell properties can help reduce the risk of moisture absorption and improve long-term thermal stability.

[0018] Further, the rigid polyurethane foam layer is a flame-retardant polyurethane foam layer added with a flame retardant, and the fireproof performance of the material can be further improved by adding the flame retardant, so that it is more suitable for fire-fighting pipeline scenes with strict requirements on fireproof grade.

[0019] Further, the outer protective pipe 7 is a high-density polyethylene pipe, a polypropylene pipe or a polyvinyl chloride pipe, which can provide effective moisture protection and basic mechanical protection for the pipe section, and has certain environmental weather resistance. The outer protective pipe 7 is a galvanized metal thin-walled pipe or a stainless steel thin-walled pipe. Such a metal outer protective layer can provide more solid external protection for the pipe section, and its strong mechanical strength helps to resist external impact and has good durability. For outdoor laid pipelines, materials with good weather resistance and strong ultraviolet resistance should be selected. For buried pipelines, materials with corrosion resistance and high compressive strength should be considered.

[0020] The integrally combined pipe structure preformed in the factory firmly combines the inner pipe body 1, the thermal insulation layer containing multiple layers of composite materials and the outer protective pipe 7 with waterproof and mechanical impact resistance, effectively overcoming the shortcomings of the traditional on-site construction of the outer covering thermal insulation, which is complicated and the thermal insulation layer is easily damaged. The integrated structure helps to improve the durability and reliability of the thermal insulation layer. The outer protective structure can reduce the risk of damage during transportation and installation. The internal multi-layer thermal insulation structure meets the thermal insulation performance and takes into account the fireproof requirement, avoiding the energy consumption and safety hazards of electric heat tracing, and providing a more convenient construction and lower maintenance requirement anti-frost and anti-condensation solution for the pipeline system.

[0021] The above only describes the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any equivalent changes made according to the content of the present application and the accompanying drawings are included in the scope of the present application.

Claims

1. An integrated self-insulating pipe section for fire protection pipes and water supply pipes, characterized by: include: The inner tube body is used for conveying fluids and is made of metal or plastic; an insulation layer coated on the outer wall of the inner tube body, the insulation layer comprising a first nanoporous aerogel composite material layer, a first metal thin-walled tube, a heat-insulating layer, a second metal thin-walled tube, and a second nanoporous aerogel composite material layer stacked in sequence from the inside out; The outer protective tube is covered on the outermost side of the insulation layer and is a waterproof and mechanically impact-resistant tube structure; The inner pipe body, the insulation layer and the outer protective pipe are prefabricated and combined into an integral rigid composite pipe structure.

2. The integrated self-insulating pipe section for fire protection pipes and water supply pipes according to claim 1, characterized in that: The inner pipe body is a galvanized steel pipe, a stainless steel pipe, a polypropylene pipe, a high temperature resistant polyethylene pipe or a chlorinated polyvinyl chloride pipe.

3. The integrated self-insulating pipe section for fire protection pipes and water supply pipes according to claim 1, characterized in that: The heat insulation layer is a rigid polyurethane foam layer or a vacuum insulation board core material layer.

4. The integrated self-insulating pipe section for fire protection pipes and water supply pipes according to claim 3 is characterized in that: The rigid polyurethane foam layer is a flame retardant polyurethane foam layer to which a flame retardant is added.

5. The integrated self-insulating pipe section for fire protection pipes and water supply pipes according to claim 1, characterized in that: The outer protective pipe is a high-density polyethylene pipe, a polypropylene pipe, or a polyvinyl chloride pipe.

6. The integrated self-insulating pipe section for fire protection pipes and water supply pipes according to claim 1, characterized in that: The outer protective tube is a galvanized metal thin-wall tube or a stainless steel thin-wall tube.

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