CN219282619U - Thermal insulation composite pipe - Google Patents
Thermal insulation composite pipe Download PDFInfo
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- CN219282619U CN219282619U CN202223213905.6U CN202223213905U CN219282619U CN 219282619 U CN219282619 U CN 219282619U CN 202223213905 U CN202223213905 U CN 202223213905U CN 219282619 U CN219282619 U CN 219282619U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The utility model provides a heat-insulating composite pipe, and belongs to the technical field of pipeline structures. The heat-insulating composite pipe comprises a basal layer, a heat-insulating layer, a bonding layer and a weather-resistant reinforcing layer which are sequentially arranged from inside to outside. The heat-insulating composite pipe can have excellent weather resistance and heat insulation property, has higher strength, and solves the problems of easy breakage, easy aging, faster heat conduction and the like of the conventional PE pipe.
Description
Technical Field
The utility model relates to the technical field of pipeline structures, in particular to a heat-insulating composite pipe.
Background
The pipe is a material necessary for constructional engineering, and as the plastic pipe has good corrosion resistance and better shaping, the strength of the plastic pipe is greatly improved along with the appearance of novel materials and the improvement of novel processes, and the plastic pipe is more and more widely used, wherein the Polyolefin (PE) pipe is more and more applied.
Because of the characteristics of the PE material, such as poor weather resistance, poor heat preservation, low strength, wear resistance and the like, when the PE material is used as a water supply pipe for conveying hot water or cold water, heat preservation cotton is generally required to be wrapped on the periphery of the water supply pipe to preserve heat of water in the water supply pipe, so that construction period and workload are increased, the pipe cannot be directly used outdoors or stacked for a long time, and wider application of the PE pipe is limited.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The utility model aims to provide a heat-insulating composite pipe which can solve the problems of poor weather resistance, poor heat insulation, low strength, wear resistance and the like of the conventional PE pipe.
The utility model can be realized as follows:
the utility model provides a heat-insulating composite pipe which comprises a basal layer, a heat-insulating layer, a bonding layer and a weather-resistant reinforcing layer which are sequentially arranged from inside to outside.
In an alternative embodiment, the thickness of the base layer is 1-2mm.
In an alternative embodiment, the substrate layer is a heat resistant polyethylene layer or a crosslinked polyethylene layer or a polyethylene layer.
In an alternative embodiment, the thickness of the insulating layer is 0.5-1.5mm.
In an alternative embodiment, the thermal insulation layer is a hollow glass bead filled PE layer.
In an alternative embodiment, the thickness of the adhesive layer is 0.01-0.1mm.
In an alternative embodiment, the tie layer is an ethylene vinyl acetate copolymer layer or a thermoplastic rubber layer.
In an alternative embodiment, the thickness of the enhanced weathering layer is from 0.5 to 1.5mm.
In an alternative embodiment, the reinforced weathering layer is a composite layer of short glass fiber reinforced PET or a composite layer of short glass fiber reinforced PBT/PET blend alloy.
In an alternative embodiment, the base layer has a thickness of 1.5mm, the thermal insulation layer has a thickness of 1mm, the tie layer has a thickness of 0.05mm, and the enhanced weathering layer has a thickness of 1mm.
The beneficial effects of the utility model include:
the heat-insulating composite pipe provided by the application has excellent weather resistance, heat insulation and high strength; solves the problems of easy breakage, easy aging, faster heat conduction and the like of the prior PE pipe, and is beneficial to widening the application field of the PE pipe.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a heat insulation composite pipe according to an embodiment of the present utility model.
Icon: 1-a bottom layer; 2-an insulating layer; 3-a bonding layer; 4-enhancing the weathering layer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.
Furthermore, the terms "horizontal," "vertical," and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1, the present embodiment provides a thermal insulation composite pipe, which includes a four-layer structure, specifically, a base layer 1, a thermal insulation layer 2, a bonding layer 3 and a weather-resistant reinforcing layer 4 sequentially disposed from inside to outside.
That is, the innermost layer is the substrate layer 1, the outer surface of the substrate layer 1 is provided with the heat preservation layer 2, the outer surface of the heat preservation layer 2 is provided with the bonding layer 3, and the outer surface of the bonding layer 3 is provided with the enhanced weather-proof layer 4.
In this application, the thickness of the base layer 1 is 1-2mm.
Illustratively, the thickness of the substrate layer 1 may be 1mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm, 1.95mm, or 2mm, etc., as well as any other value within the range of 1-2mm.
The base layer 1 is a heat-resistant polyethylene layer or a crosslinked polyethylene layer or a polyethylene layer.
That is, the raw material for preparing the base layer 1 may be heat-resistant polyethylene, crosslinked polyethylene, or polyethylene.
Among them, heat-resistant polyethylene, also called PE-RT, is a metallocene catalyzed copolymerization of ethylene (ethylene) and octene monomers. The use temperature of the heat-resistant polyethylene can be above 80 ℃, and the heat-resistant polyethylene can resist compression and corrosion after being processed into a pipeline, has the service life of 50 years, is environment-friendly and can be recycled.
The english abbreviation XLPE for crosslinked polyethylene has the following advantages:
(1) Heat resistance: XLPE with a net-like three-dimensional structure has very excellent heat resistance. Does not decompose or carbonize below 200 ℃, can reach 90 ℃ in long-term working temperature, and has a thermal life of 40 years.
(2) Insulation properties: XLPE maintains the original good insulation properties of PE and insulation resistance is further increased. The dielectric loss tangent is small and is not greatly affected by temperature.
(3) Mechanical properties: because new chemical bonds are established among macromolecules, the hardness, the rigidity, the wear resistance and the impact resistance of XLPE are all improved, thereby overcoming the defect that PE is easy to crack due to environmental stress.
(4) Chemical resistance: XLPE has stronger acid and alkali resistance and oil resistance.
Namely, the PE modified by crosslinking can greatly improve the performance, not only remarkably improves the comprehensive properties of PE such as mechanical property, environmental stress cracking resistance, chemical corrosion resistance, creep resistance, electrical property and the like, but also remarkably improves the temperature resistance grade.
Polyethylene (PE) is a thermoplastic resin produced by polymerizing ethylene. Polyethylene is odorless, nontoxic, wax-like in hand feeling, and has excellent low temperature resistance (the minimum use temperature can reach-100 to-70 ℃). Polyethylene has better chemical stability, and can resist dilute nitric acid, dilute sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ammonia water, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide and other solutions with any concentration at room temperature.
On the above, the above base layer 1 can provide good heat resistance and processability for the composite pipe, and is sanitary and environment-friendly, while providing a mounting base for the remaining layers.
In the present application, the thickness of the heat-insulating layer 2 is 0.5-1.5mm.
Illustratively, the thickness of the insulating layer 2 may be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, etc., and may be any other value within the range of 0.5-1.5mm.
The heat preservation layer 2 is a PE layer filled with hollow glass beads. Namely, the preparation raw material of the heat preservation layer 2 is PE filled with hollow glass beads.
The hollow glass beads (hollow glass beads) are a kind of tiny, hollow, spherical powder. The particle size can be arbitrarily selected between 30 and 100 micrometers according to the requirements, and the density is 0.1 to 0.7g/mL, and the composite material has the advantages of light weight, large volume, low heat conductivity coefficient, high compressive strength, good dispersibility, fluidity and stability. In addition, the hollow glass microsphere also has the excellent performances of insulation, self-lubrication, sound insulation, no water absorption, fire resistance, corrosion resistance, radiation protection, no toxicity and the like. The material can be directly filled in most thermosetting and thermoplastic resin products, and has the effects of reducing the weight of the products, reducing the cost, eliminating the internal stress of the products, ensuring the dimensional stability, and having high compression resistance, impact resistance, refractoriness, sound insulation and heat insulation, insulation and the like.
Because the hollow glass beads have better heat preservation effect, the heat preservation effect of the composite pipe can be greatly improved after the hollow glass beads are applied to the heat preservation layer 2.
The main materials based on the substrate layer 1 and the heat preservation layer 2 are PE, so that the substrate layer 1 and the heat preservation layer 2 can be directly bonded through a multilayer coextrusion process.
In this application, the thickness of the adhesive layer 3 is 0.01-0.1mm.
Illustratively, the thickness of the adhesive layer 3 may be 0.01mm, 0.015mm, 0.02mm, 0.025mm, 0.03mm, 0.035mm, 0.04mm, 0.045mm, 0.05mm, 0.055mm, 0.06mm, 0.065mm, 0.07mm, 0.075mm, 0.08mm, 0.085mm, 0.09mm, 0.095mm, or 0.1mm, etc., and may be any other value in the range of 0.01 to 0.1mm.
The adhesive layer 3 is an ethylene-vinyl acetate copolymer layer or a thermoplastic rubber layer. That is, the adhesive layer 3 is prepared from an ethylene-vinyl acetate copolymer or a thermoplastic rubber.
Wherein the ethylene-vinyl acetate copolymer (EVA) is a general high molecular polymer, and the molecular formula is (C 2 H 4 ) x ·(C 4 H 6 O 2 ) y Is flammable and has no pungent burning smell.
Thermoplastic rubber, TPE for short, also called thermoplastic elastomer, is a kind of polymer material which shows rubber elasticity at normal temperature and shows plasticity when heated. Such materials combine the thermoplastic processing and shaping characteristics with the rubber elastic properties of vulcanized rubber. Specifically, thermoplastic rubber has similar physical properties to conventional vulcanized rubber, but is not vulcanized, and can be molded by a conventional plastic processing method like thermoplastic resin, and the product can be recycled and reprocessed without losing its basic properties.
On the support, the bonding layer mainly plays a role in fixed connection, and only a small amount of bonding layer is needed to solve the problems of firm material forming and bonding.
In this application, the thickness of the enhanced weathering layer 4 is 0.5-1.5mm.
Illustratively, the thickness of the enhanced weathering layer 4 may be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, etc., as well as any other value within the range of 0.5-1.5mm.
The reinforced weather-resistant layer 4 is a composite material layer of short glass fiber reinforced PET or a composite material layer of short glass fiber reinforced PBT/PET blend alloy.
That is, the raw material for preparing the reinforced weather-resistant layer 4 can be a composite material of short glass fiber reinforced PET, a composite material of short glass fiber reinforced PBT, or a composite material of a short glass fiber reinforced PBT/PET blend alloy.
The short glass fiber is formed by melting quartz sand at high temperature, adopting a special sizing agent (softening agent) to draw raw wires, and carrying out wet online chopping or product glass fiber chopping, and is mainly used for reinforcing thermoplastic plastics.
PET is polyethylene terephthalate, which is prepared by exchanging dimethyl terephthalate with glycol or synthesizing dihydroxyethyl terephthalate by esterifying terephthalic acid with glycol, and then carrying out polycondensation reaction. The high-temperature-resistant high-voltage cable has excellent physical and mechanical properties in a wider temperature range, can be used for 120 ℃ for a long time, has excellent electrical insulation property, and even under high temperature and high frequency, has better electrical property, but has poor corona resistance, creep resistance, fatigue resistance, friction resistance and dimensional stability.
In addition, the PET material can also be selected from bottle flake reclaimed materials, so that a new way is provided for the PET bottle flake reclaimed materials, and the PET bottle flake reclaimed materials have energy-saving and environment-friendly values.
PBT is polybutylene terephthalate, which is polyester prepared by polycondensation of terephthalic acid and 1, 4-butanediol; the thermoplastic polyester is a milky semitransparent to opaque semi-crystalline thermoplastic polyester, has high heat resistance, is not resistant to strong acid and strong alkali, and can resist organic solvents.
The composite material of the short glass fiber reinforced PET, the composite material of the short glass fiber reinforced PBT and the composite material of the short glass fiber reinforced PBT/PET blend alloy can refer to related materials in the prior art, and are not repeated herein.
On the other hand, the reinforced weather-resistant layer 4 can provide higher strength, rigidity and hardness for the composite pipe, and good wear resistance and weather resistance, wherein the added short glass fiber is beneficial to improving the dimensional stability of the pipeline.
In some preferred embodiments, the thickness of the base layer 1 of the insulation composite pipe is 1.5mm, the thickness of the insulation layer 2 is 1mm, the thickness of the adhesive layer 3 is 0.05mm, and the thickness of the reinforced weather-resistant layer 4 is 1mm.
The thicknesses of the base layer 1, the heat insulating layer 2, the adhesive layer 3, and the reinforced weather-resistant layer 4 may be set to other values within the thickness range provided in the present application, as necessary.
In conclusion, the heat-insulating composite pipe provided by the application solves the problems of easiness in breakage, easiness in aging, rapidness in heat conduction and the like of the conventional PE pipe, and has the advantages of high strength, high weather resistance, good heat insulation and the like. In addition, the composite pipe is easy to process, and the connection between the layers is reliable.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The heat-insulating composite pipe is characterized by comprising a basal layer, a heat-insulating layer, a bonding layer and a weather-resistant reinforcing layer which are sequentially arranged from inside to outside;
the substrate layer is a heat-resistant polyethylene layer or a crosslinked polyethylene layer or a polyethylene layer; the heat preservation layer is a PE layer filled with hollow glass beads; the bonding layer is an ethylene-vinyl acetate copolymer layer or a thermoplastic rubber layer; the reinforced weather-resistant layer is a short glass fiber reinforced PET composite material layer or a short glass fiber reinforced PBT/PET blend alloy composite material layer.
2. The insulated composite pipe of claim 1, wherein the base layer has a thickness of 1-2mm.
3. The insulated composite pipe of claim 1, wherein the insulation layer has a thickness of 0.5-1.5mm.
4. The insulated composite pipe of claim 1, wherein the bonding layer has a thickness of 0.01-0.1mm.
5. The insulated composite pipe of claim 1, wherein the enhanced weathering layer has a thickness of 0.5-1.5mm.
6. The insulated composite pipe of claim 1, wherein the base layer has a thickness of 1.5mm, the insulation layer has a thickness of 1mm, the tie layer has a thickness of 0.05mm, and the enhanced weathering layer has a thickness of 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223213905.6U CN219282619U (en) | 2022-11-30 | 2022-11-30 | Thermal insulation composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223213905.6U CN219282619U (en) | 2022-11-30 | 2022-11-30 | Thermal insulation composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219282619U true CN219282619U (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223213905.6U Active CN219282619U (en) | 2022-11-30 | 2022-11-30 | Thermal insulation composite pipe |
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|---|---|
| CN (1) | CN219282619U (en) |
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- 2022-11-30 CN CN202223213905.6U patent/CN219282619U/en active Active
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