A UV-resistant and weather-resistant PVC-O plastic pipe

Abstract

This utility model relates to the field of plastic pipe technology, and more particularly to a UV-resistant and weather-resistant PVC-O plastic pipe. The technical solution includes: a pipe body, which comprises an outer structural layer, a buffer layer, and an inner structural layer arranged sequentially from the outside to the inside. The outer structural layer is made of UV-resistant modified PVC-O material, with a microwave-like texture on the outer surface and annular and spiral ribs on the inside. The buffer layer is made of closed-cell micro-foamed material to alleviate interlayer stress caused by thermal expansion and contraction. The inner wall of the inner structural layer is coated with a hydrophobic layer. Adhesive transition layers are provided between the outer structural layer and the buffer layer, and between the buffer layer and the inner structural layer. This utility model, through the synergistic design of a multi-layered composite structure and functional materials, improves the UV aging resistance, thermal stability, and structural strength of the PVC-O pipe. The overall structure is suitable for long-term use in harsh environments and possesses good weather resistance, connection reliability, and internal wall cleanliness.

Description

Technical Field

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

[0002] Polyvinyl chloride (PVC) materials are widely used in construction, municipal water supply and drainage, power conduit, and agricultural irrigation due to their excellent corrosion resistance, processing performance, and cost-effectiveness. In recent years, with the development of biaxially oriented PVC (PVC-O) technology, PVC pipes have achieved significant improvements in mechanical properties, possessing higher impact resistance and ring stiffness, making them an important alternative to traditional metal pipes.

[0003] However, during long-term outdoor use, PVC-O pipes are susceptible to ultraviolet (UV) radiation and alternating high / low temperature environments, leading to aging phenomena such as powdering, brittleness, and delamination on the material surface. This is especially severe in areas with high UV radiation. In addition, the lack of coordination between thermal expansion and contraction between the interlayer structures can also easily cause peeling or cracking. At the same time, the end connection areas of PVC-O pipes are more prone to failure due to stress concentration and UV exposure, further limiting their stable application in extreme environments.

[0004] Traditional UV-resistant PVC pipes are protected by adding UV absorbers to the formula or spraying anti-UV coatings on the surface. However, the anti-aging time is limited, it is difficult to balance structural reinforcement and environmental adaptability, and it lacks multi-layer synergistic structure and stress buffering mechanism. The overall weather resistance still needs to be improved.

[0005] Therefore, we propose a UV-resistant and weather-resistant PVC-O plastic pipe to solve the existing problems. Utility Model Content

[0006] The purpose of this invention is to address the problems existing in the background technology by proposing a UV-resistant and weather-resistant PVC-O plastic pipe.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a UV-resistant and weather-resistant PVC-O plastic pipe, comprising a pipe body, wherein the pipe body is composed of an outer structural layer, a buffer layer and an inner structural layer, wherein the outer structural layer, the buffer layer and the inner structural layer are arranged sequentially from the outside to the inside;

[0008] The outer structural layer is a UV-resistant modified PVC-O material layer, the inner structural layer is a high-strength pressure-resistant PVC-O material layer, and the buffer layer is made of closed-cell micro-foamed modified PVC material, which is used to absorb interlayer stress changes during thermal expansion and contraction.

[0009] The outer surface of the outer structural layer is provided with microwave texture, and the inner surface of the outer structural layer is provided with annular ribs and spiral ribs at equal intervals, and the annular ribs are fixedly connected to each other by the spiral ribs.

[0010] Preferably, a first bonding transition layer is provided between the outer structural layer and the buffer layer, and a second bonding transition layer is provided between the buffer layer and the inner structural layer. Both the first bonding transition layer and the second bonding transition layer contain interfacial coupling agents and microfillers to enhance interlayer adhesion and alleviate interfacial stress concentration.

[0011] Preferably, the inner wall of the inner structural layer is coated with a hydrophobic layer, which is made of nano-silicon coating material to reduce condensate adhesion and inhibit scale deposition.

[0012] Preferably, the outer surface of the tube is covered with a peelable UV-resistant protective film, which is a semi-transparent polymer film.

[0013] Preferably, the microwave texture is evenly distributed along the axial direction of the tube body to reduce direct ultraviolet radiation and reflection, thereby improving the weather resistance and stress buffering capacity of the outer structural layer.

[0014] Preferably, the outer structural layer is mixed with an ultraviolet absorber and an inert inorganic filler. The ultraviolet absorber includes titanium dioxide and hindered amine light stabilizers, and the inert inorganic filler includes talc, mica powder and ceramic particles.

[0015] Preferably, reinforcing sleeves are symmetrically fixed at both ends of the pipe body, and flanges are fixedly mounted on the reinforcing sleeves. Mounting holes are equidistantly opened on the flanges, and the mounting holes are distributed in a ring array on the flanges.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The tube body of this utility model is arranged in the order of outer structural layer, buffer layer and inner structural layer from the outside to the inside, with clear functional division. The buffer layer adopts a closed-cell micro foam structure, which effectively absorbs the interlayer stress caused by thermal expansion and contraction and enhances the synergistic stability of the multi-layer structure. The outer structural layer is made of UV-resistant modified PVC-O material, and is mixed with UV absorbers and inert inorganic fillers. At the same time, it has a microwave texture structure on the outer surface, which can effectively scatter ultraviolet light, delay surface aging and improve the overall weather resistance life.

[0018] The outer structural layer is equipped with equally spaced annular and spiral ribs to form a composite reinforcement structure, which improves the overall deformation resistance and external impact resistance of the pipe.

[0019] The inner wall of the inner structural layer is coated with a hydrophobic layer, which helps to reduce condensation and scale buildup, and improves the cleanliness of the pipe wall and fluid transport efficiency.

[0020] The outer surface of the pipe is covered with a peelable UV-resistant protective film, which effectively prevents ultraviolet radiation and dust adhesion during transportation and storage. It can be removed before construction without affecting the subsequent performance of the pipe.

[0021] The pipe body is equipped with reinforcing sleeves and flange structures at both ends, which facilitates quick connection and installation while improving the anti-aging and anti-breakage capabilities of the interface, ensuring the safe and reliable operation of the system. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the layered cross-sectional structure of the tube body of this utility model;

[0024] Figure 3 This is a schematic cross-sectional view of the outer structural layer of this utility model;

[0025] Figure 4 This is a schematic diagram of the reinforcing sleeve structure of this utility model.

[0026] Figure label:

[0027] 1. Pipe body; 101. Outer structural layer; 102. First bonding transition layer; 103. Buffer layer; 104. Second bonding transition layer; 105. Inner structural layer; 106. Hydrophobic layer; 2. Flange; 3. Mounting hole; 4. Reinforcing sleeve; 5. Annular rib; 6. Spiral rib; 7. Microwave texture. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] like Figures 1-4 As shown, the present invention proposes an UV-resistant and weather-resistant PVC-O plastic pipe, which includes a pipe body 1. The pipe body 1 includes, from the outside to the inside, an outer structural layer 101, a first bonding transition layer 102, a buffer layer 103, a second bonding transition layer 104, and an inner structural layer 105.

[0031] The outer structural layer 101 is made of UV-resistant modified PVC-O material, which contains UV absorbers and inert inorganic fillers. The UV absorbers are titanium dioxide and hindered amine light stabilizers, and the inert inorganic fillers are talc powder, mica powder and ceramic particles, which play the roles of UV scattering, anti-aging and improving surface strength.

[0032] The outer surface of the outer structural layer 101 is provided with microwave texture 7, which is evenly distributed along the axial direction of the tube body 1. It has the function of reducing direct ultraviolet radiation and reflection, while improving the surface heat dissipation efficiency.

[0033] The outer structural layer 101 has several annular ribs 5 arranged at equal intervals inside. The annular ribs 5 are connected by spiral ribs 6 to form a composite reinforcing rib structure, which is used to improve the overall ring stiffness and resistance to external deformation of the pipe body 1.

[0034] The buffer layer 103 is disposed between the outer structural layer 101 and the inner structural layer 105. It is made of closed-cell micro-foamed modified PVC material. This layer has good elasticity and stress buffering capacity. In high temperature or low temperature environment, it can effectively alleviate the interlayer stress difference generated during thermal expansion and contraction and prevent delamination or structural cracking.

[0035] The first bonding transition layer 102 is disposed between the outer structural layer 101 and the buffer layer 103, and the second bonding transition layer 104 is disposed between the buffer layer 103 and the inner structural layer 105. Both transition layers are provided with interfacial coupling agents and microfillers to enhance the adhesion strength between different material layers, improve the transition performance of interlayer thermal stress, and enhance the stability and durability of the composite structure.

[0036] The inner structural layer 105 is made of high-strength, pressure-resistant PVC-O material, which has good mechanical properties and internal pressure bearing capacity. A hydrophobic layer 106 is sprayed on the inner wall surface of the inner structural layer 105. The hydrophobic layer 106 is composed of a nano-silicon coating and has excellent surface hydrophobicity. It is used to reduce scale adhesion and condensate accumulation, and improve the cleanliness and service life of the pipe inner wall.

[0037] Example 2

[0038] like Figures 1-4 As shown, the present invention proposes an anti-ultraviolet weather-resistant PVC-O plastic pipe. Compared with Embodiment 1, this embodiment further includes: the outer surface of the pipe body 1 is covered with a peelable anti-ultraviolet protective film. This protective film is a semi-transparent polymer film material, mainly used to block ultraviolet radiation during transportation and storage, and prevent the surface of the plastic pipe from aging. It can be completely removed before construction without affecting the normal use of the pipe body 1.

[0039] The pipe body 1 is symmetrically provided with reinforcing sleeves 4 at both ends. A flange 2 is fixedly installed on the reinforcing sleeve 4. Multiple mounting holes 3 are equally spaced on the flange 2. The mounting holes 3 are distributed in a ring array on the flange 2 to achieve quick connection and sealing installation. The reinforcing sleeve 4 is heat-fused or mechanically nested with the pipe body 1 to improve the anti-aging ability and connection strength of the connection area.

[0040] This UV-resistant and weather-resistant PVC-O plastic pipe has a stable structure and reliable interlayer bonding. It has good resistance to UV aging, weather resistance, pressure resistance and internal wall cleanliness. It is especially suitable for water conservancy, municipal and power pipeline transportation systems in harsh environments such as the field, exposure, high temperature and humidity and high UV radiation.

[0041] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A UV-resistant and weather-resistant PVC-O plastic pipe, comprising a pipe body (1), characterized in that: The tube body (1) is composed of an outer structural layer (101), a buffer layer (103) and an inner structural layer (105), which are arranged sequentially from the outside to the inside. The outer structural layer (101) is an UV-resistant modified PVC-O material layer, the inner structural layer (105) is a high-strength pressure-resistant PVC-O material layer, and the buffer layer (103) is made of closed-cell micro-foamed modified PVC material, which is used to absorb interlayer stress changes during thermal expansion and contraction. The outer surface of the outer structural layer (101) is provided with microwave texture (7), and the inner surface of the outer structural layer (101) is provided with annular ribs (5) and spiral ribs (6) at equal intervals, and the annular ribs (5) are fixedly connected to each other through the spiral ribs (6).

2. The anti-ultraviolet weatherable PVC-O plastic pipe according to claim 1, characterized in that: A first bonding transition layer (102) is provided between the outer structural layer (101) and the buffer layer (103), and a second bonding transition layer (104) is provided between the buffer layer (103) and the inner structural layer (105). Both the first bonding transition layer (102) and the second bonding transition layer (104) contain interfacial coupling agents and microfillers to enhance interlayer adhesion and alleviate interfacial stress concentration.

3. The anti-ultraviolet weatherable PVC-O plastic pipe according to claim 1, characterized in that: The inner wall of the inner structural layer (105) is coated with a hydrophobic layer (106), which is made of nano-silicon coating material to reduce condensate adhesion and inhibit scale deposition.

4. The anti-ultraviolet weatherable PVC-O plastic pipe according to claim 1, characterized in that: The outer surface of the tube (1) is covered with a peelable UV-resistant protective film, which is a semi-transparent polymer film.

5. The anti-ultraviolet weatherable PVC-O plastic pipe according to claim 1, characterized in that: The microwave texture (7) is evenly distributed along the axial direction of the tube body (1) to reduce direct ultraviolet radiation and reflection, and to improve the weather resistance and stress buffering capacity of the outer structural layer (101).

6. The anti-ultraviolet weatherable PVC-O plastic pipe according to claim 1, characterized in that: The outer structural layer (101) is mixed with ultraviolet absorbers and inert inorganic fillers. The ultraviolet absorbers include titanium dioxide and hindered amine light stabilizers, and the inert inorganic fillers include talc, mica powder and ceramic particles.

7. The anti-ultraviolet weatherable PVC-O plastic pipe according to claim 1, characterized in that: The pipe body (1) is symmetrically fixed with reinforcing sleeves (4) at both ends. A flange (2) is fixedly installed on the reinforcing sleeve (4). Mounting holes (3) are equidistantly opened on the flange (2). The mounting holes (3) are arranged in a ring array on the flange (2).

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