Sun-proof and anti-ultraviolet PE pipe

Abstract

This invention provides a sun-proof and UV-resistant PE pipe, relating to the field of plastic pipe technology, comprising an eight-layer co-extruded composite structure from the outside to the inside. By constructing an eight-layer composite structure with different functions working synergistically, this invention achieves systematic and intelligent comprehensive protection against UV radiation and solar heat radiation. A high-weather-resistant reflective layer and a main UV-shielding layer form a dual UV protection system of reflection and absorption. Simultaneously, a photothermal conversion radiation layer, a microchannel active heat dissipation layer, and a vacuum insulation layer are introduced, forming an efficient active cooling and passive insulation thermal management mechanism, inhibiting the pipe's thermo-oxidative aging. Furthermore, a self-healing buffer layer endows the pipe with self-healing capabilities, enhancing its long-term reliability, while a nano-photocatalytic self-cleaning layer maintains the hygiene of the pipe's interior. This multi-level, multi-functional integrated design gives the pipe an extremely long service life and stability even in extreme outdoor environments.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe technology, and in particular to a sun-proof and UV-resistant PE pipe. Background Technology

[0002] PE pipes are widely used in various fields such as municipal water supply and drainage, agricultural irrigation, gas transmission, and industrial fluid transmission due to their advantages such as corrosion resistance, light weight, convenient installation, and low cost. However, in outdoor use scenarios, PE pipes are exposed to sunlight for a long time, and ultraviolet rays will damage the molecular structure of PE pipes, leading to problems such as aging, embrittlement, and cracking, which significantly shortens the service life of the pipes and affects their performance and safety.

[0003] Currently, most pipes on the market are coated with sun-protective paint or use simple multi-layer co-extrusion structures. However, the surface coating has problems such as poor adhesion and easy wear and peeling. Once the coating is damaged, the protective effect is immediately lost. Moreover, the existing multi-layer pipes have few layers and single functions. Most of them are limited to a simple combination of color layer, functional layer and structural layer, and have failed to fundamentally and systematically solve the comprehensive problems of ultraviolet protection, heat accumulation and physical damage. Utility Model Content

[0004] The purpose of this utility model is to provide a sun-proof and UV-resistant PE pipe to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a sun-proof and UV-resistant PE pipe, comprising an eight-layer structure co-extruded sequentially from the outside to the inside:

[0006] High weather-resistant reflective layer, photothermal conversion and radiation layer, microchannel active heat dissipation layer, self-healing buffer layer, main ultraviolet shielding layer, vacuum insulation layer, reinforced pressure-bearing layer and nano-photocatalytic self-cleaning layer.

[0007] Preferably, the high weather-resistant reflective layer is a composite thin layer containing ceramic microspheres and polyvinylidene fluoride, with a thickness of 100-200 μm.

[0008] Preferably, the photothermal conversion and radiation layer is a composite layer containing carbon nanotubes and phase change materials, with a thickness of 150-300 μm; the microchannel active heat dissipation layer is a polyethylene layer with a closed microchannel network inside, with a thickness of 0.8-1.5 mm.

[0009] Preferably, the self-healing buffer layer is an elastic polymer layer containing repair agent microcapsules, with a thickness of 0.5-1.0 mm.

[0010] Preferably, the main ultraviolet shielding layer is a polyethylene composite layer containing nano-carbon black and graphene, with a thickness of 1.0-1.8 mm.

[0011] Preferably, the vacuum insulation layer is a vacuum-sealed microporous polyethylene foam layer with a thickness of 2.0-4.0 mm.

[0012] Preferably, the reinforcing pressure-bearing layer is a composite layer of continuous glass fiber and polyethylene with a thickness of 1.5-3.0 mm; the nano-photocatalytic self-cleaning layer is a composite layer of polyethylene loaded with nano-titanium dioxide and silver ions with a thickness of 200-500 μm.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model constructs a composite structure consisting of eight layers with different functions that work together to achieve systematic and intelligent comprehensive protection against ultraviolet radiation and solar thermal radiation. A dual ultraviolet protection system of reflection and absorption is formed by a high weather-resistant reflective layer and a main ultraviolet shielding layer. At the same time, a photothermal conversion radiation layer, a microchannel active heat dissipation layer, and a vacuum insulation layer are introduced to form an efficient active cooling and passive insulation thermal management mechanism, which inhibits the thermo-oxidative aging of the pipe. In addition, the self-healing buffer layer gives the pipe the ability to self-heal damage, enhancing its long-term reliability, while the nano-photocatalytic self-cleaning layer maintains the hygiene inside the pipe. The multi-level and multi-functional integrated design enables the pipe to have an ultra-long service life, excellent stability, and comprehensive self-maintenance capabilities in extreme outdoor environments. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional view of the main structure of a sun-proof and UV-resistant PE pipe.

[0016] Figure 2 A structural plan view of a sun-proof and UV-resistant PE pipe is provided for this utility model;

[0017] Figure 3 This invention presents an enlarged structural diagram (A) of a sun-proof and UV-resistant PE pipe.

[0018] Legend:

[0019] 100. High weather-resistant reflective layer; 101. Photothermal conversion and radiation layer; 102. Microchannel active heat dissipation layer; 103. Self-healing buffer layer; 104. Main ultraviolet shielding layer; 105. Vacuum insulation layer; 106. Reinforced pressure-bearing layer; 107. Nano-photocatalytic self-cleaning layer. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Implementation examples, based on Figures 1-3 As shown, a sun-proof and UV-resistant PE pipe comprises an eight-layer co-extruded composite structure from the outside to the inside:

[0023] The system comprises a high weather-resistant reflective layer 100, a photothermal conversion and radiation layer 101, a microchannel active heat dissipation layer 102, a self-healing buffer layer 103, a main ultraviolet shielding layer 104, a vacuum insulation layer 105, a reinforced pressure-bearing layer 106, and a nano-photocatalytic self-cleaning layer 107. The high weather-resistant reflective layer 100 is a composite thin layer containing ceramic microspheres and polyvinylidene fluoride, with a thickness of 100-200 μm. The photothermal conversion and radiation layer 101 is a composite layer containing carbon nanotubes and phase change materials, with a thickness of 150-300 μm. The microchannel active heat dissipation layer 102 is a polyethylene layer with an internal closed microchannel network, with a thickness of 0.8-1 μm. The self-healing buffer layer 103 is an elastic polymer layer containing repair agent microcapsules, with a thickness of 0.5-1.0 mm. The main ultraviolet shielding layer 104 is a polyethylene composite layer containing nano carbon black and graphene, with a thickness of 1.0-1.8 mm. The vacuum insulation layer 105 is a vacuum-sealed microporous foam polyethylene layer with a thickness of 2.0-4.0 mm. The reinforcing pressure-bearing layer 106 is a composite layer of continuous glass fiber and polyethylene with a thickness of 1.5-3.0 mm. The nano photocatalytic self-cleaning layer 107 is a polyethylene composite layer loaded with nano titanium dioxide and silver ions with a thickness of 200-500 μm.

[0024] The overall effect of this embodiment is as follows: The entire protective system begins with the outermost high-weather-resistant reflective layer 100. This layer is not an ordinary white layer, but a composite thin layer composed of ceramic microspheres and polyvinylidene fluoride. Its surface is extremely smooth and hard, and it can reflect solar radiation energy, including ultraviolet and visible light, back like a mirror, minimizing energy input at the source. It also has excellent wear resistance and stain resistance. The residual energy penetrating the first layer enters the photothermal conversion and radiation layer 101, which uses a composite material of carbon nanotubes and phase change materials. This not only efficiently absorbs residual light energy, but more importantly, the directionally arranged carbon nanotubes can efficiently emit the absorbed heat into the cold outer space in the form of mid-infrared radiation of a specific wavelength, thereby achieving... A physical effect known as radiative cooling results in the surface temperature of this layer, and even the entire tube, potentially falling below ambient temperature, achieving a leap from heat resistance to active cooling. To further enhance heat dissipation efficiency, the subsequent microchannel active heat dissipation layer 102 acts like a capillary network embedded in the tube wall. The internally closed-loop low-boiling-point working fluid evaporates and absorbs heat in the heated area and liquefies and releases heat in the condensing area. Through continuous phase change cycles, heat from the tube wall is efficiently and evenly transported and dissipated, effectively avoiding hot spots caused by localized sunlight exposure and improving the uniformity of material lifespan. Considering the unavoidable physical impacts during outdoor use, the self-healing buffer layer 103 is designed as an intelligent defense. This elastic layer contains microcapsules filled with repair agents; once... When microcracks are generated by external forces and propagate to this layer, the microcapsules at the crack tips rupture, releasing a liquid repair agent that rapidly polymerizes and solidifies under the action of a catalyst. This automatically fills the cracks, preventing them from developing into a breakthrough that could lead to overall protection failure, thus greatly improving the reliability and service life of the pipe. After the above four layers of shielding, ultraviolet rays are greatly weakened. As the ultimate line of defense, the main ultraviolet shielding layer 104 is composed of high-concentration nano-carbon black and graphene. Nano-carbon black is the ultimate black hole for ultraviolet rays, capable of absorbing any residual ultraviolet rays that manage to penetrate. The sheet-like graphene not only synergistically enhances the shielding effect but also significantly improves the mechanical strength and barrier performance of this layer. To completely block the transfer of heat to the inside of the pipe, the vacuum insulation layer 105... Employing the core technology of vacuum insulation panels, this microporous PE foam layer, after being vacuumed, virtually eliminates air convection and conduction within its interior, resulting in extremely low thermal conductivity and forming a robust thermal shield. This ensures that the temperature of the transported fluid is not drastically affected by the external ambient temperature. The core pressure-bearing task of the pipe is undertaken by the reinforced pressure-bearing layer 106. This layer, through continuous online winding and fusion of glass fiber and PE, forms a robust structure similar to fiber-reinforced composite materials, giving the pipe burst pressure and ring stiffness comparable to metal pipes. It serves as the stable skeleton and load-bearing wall of the entire protective system. Finally, the nano-photocatalytic self-cleaning layer 107, which is in direct contact with the fluid, ensures the hygiene and safety of the internal fluid. The loaded nano-titanium dioxide generates strong oxidizing substances under photoexcitation.It can continuously decompose attached organic pollutants, while silver ions provide broad-spectrum and long-lasting antibacterial effects, thereby jointly inhibiting biofilm formation, maintaining the smoothness and cleanliness of the pipeline inner wall, and ensuring the quality of the transported medium.

[0025] The entire device works as follows: When the pipe is exposed to the outdoor environment, its protective system begins to operate systematically, forming a complete protection system from energy management to structural maintenance. First, the outermost high-weather-resistant reflective layer 100 constitutes the first line of defense in the entire system. This layer, carefully composited with ceramic microspheres and polyvinylidene fluoride, can reflect most of the solar radiation energy back like a mirror. This highly efficient reflection mechanism significantly reduces energy input from the source, laying a solid foundation for the protective work of subsequent layers. The residual energy passing through the reflective layer is then captured by the second layer of photothermal conversion and radiation layer 101. This layer uses innovative radiative cooling technology, in which carbon nanotubes not only absorb the remaining energy but also... Importantly, it can convert heat energy into mid-infrared radiation of a specific wavelength, directly dissipating it into the cold outer space. This unique thermal management method enables the tube surface to achieve a cooling effect below the ambient temperature, completing a significant shift from passive sun protection to active cooling. To further enhance heat dissipation efficiency, the third layer, the microchannel active heat dissipation layer 102, plays a crucial role. This built-in capillary network achieves efficient heat transfer and uniform distribution through the continuous phase change cycle of the internal working fluid. When the liquid working fluid evaporates in the heated area, it absorbs a large amount of heat. The vapor flows to the cooling area and condenses, releasing heat. This cycle effectively prevents localized overheating of the tube wall, ensuring the long-term stability of the material's performance. In addition to energy management, the tube is also equipped with intelligent damage control. The damage response system features a fourth self-healing buffer layer 103 pre-filled with microcapsules filled with repair agent. Once a micro-crack occurs on the pipe surface due to external force, the microcapsules at the crack tip rupture immediately, releasing the repair agent which rapidly solidifies under the action of a catalyst, automatically repairing the damaged area. This self-healing ability significantly improves the reliability and service life of the pipe. After the first four layers of defense, ultraviolet radiation has been greatly reduced. At this point, the fifth layer, the main ultraviolet shielding layer 104, begins to function as the ultimate defense. This composite material, rich in nano-carbon black and graphene, can almost completely absorb any residual ultraviolet radiation that penetrates to this layer. Simultaneously, the layered structure of graphene enhances the mechanical properties of the material, providing double protection for the pipe. The sixth layer... (The text abruptly ends here, likely due to an incomplete sentence or missing information.) The thermal layer 105 forms a robust thermal shield. By evacuating the microporous foam structure to a vacuum, this layer almost completely eliminates heat transfer caused by air convection and conduction. Its superior thermal insulation performance ensures that the external high-temperature environment is unlikely to affect the internal temperature of the pipe, providing a reliable guarantee for the temperature stability of the transported fluid. In the core of the protection system, the seventh layer, the reinforced pressure-bearing layer 106, undertakes a crucial mechanical support function. This layer, composed of continuous glass fiber and polyethylene composite, gives the pipe pressure-bearing capacity and ring stiffness comparable to metal, forming the structural foundation for the stable existence of the entire protection system. Finally, the eighth layer, the nano-photocatalytic self-cleaning layer 107, which is in direct contact with the transported medium, utilizes photocatalysis and the silver ion antibacterial mechanism...Maintaining the cleanliness and hygiene of the pipe's inner walls is crucial. This layer not only decomposes organic pollutants but also effectively inhibits microbial growth, ensuring consistent fluid quality throughout the transported process.

[0026] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A sun protection ultraviolet resistant PE pipe material, characterized by, It includes an eight-layer structure co-extruded from the outside in: High weather-resistant reflective layer (100), photothermal conversion and radiation layer (101), microchannel active heat dissipation layer (102), self-healing buffer layer (103), main ultraviolet shielding layer (104), vacuum heat insulation layer (105), reinforced pressure-bearing layer (106) and nano-photocatalytic self-cleaning layer (107).

2. A UV resistant PE pipe according to claim 1, characterized in that: The high weather-resistant reflective layer (100) is a composite thin layer with a thickness of 100-200μm.

3. The ultraviolet resistant PE pipe according to claim 1, characterized in that: The photothermal conversion and radiation layer (101) is a composite layer with a thickness of 150-300μm, and the microchannel active heat dissipation layer (102) is a polyethylene layer with a closed microchannel network inside, with a thickness of 0.8-1.5mm.

4. The ultraviolet resistant PE pipe according to claim 1, wherein: The self-healing buffer layer (103) is an elastic polymer layer containing repair agent microcapsules, with a thickness of 0.5-1.0 mm.

5. The ultraviolet resistant PE pipe according to claim 1, wherein: The main ultraviolet shielding layer (104) is a polyethylene composite layer with a thickness of 1.0-1.8 mm.

6. A UV resistant PE pipe according to claim 1, characterized in that: The vacuum insulation layer (105) is a vacuum-sealed microporous polyethylene foam layer with a thickness of 2.0-4.0 mm.

7. A UV resistant PE pipe according to claim 1, characterized in that: The thickness of the reinforced pressure-bearing layer (106) is 1.5-3.0 mm; the thickness of the nano-photocatalytic self-cleaning layer (107) is 200-500 μm.

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