Resin pipe self-cleaning anti-crystallization lining structure

Abstract

The utility model relates to the technical field of pipeline transportation, and specifically discloses a resin pipeline self-cleaning anti-crystallization lining structure, which comprises a lining body matched with the inner wall of a resin pipeline, wherein the lining body is composed of an ultrahydrophobic anti-adhesion layer and an elastic stripping layer which are tightly combined from inside to outside; the ultrahydrophobic anti-adhesion layer is a nanometer silicon dioxide modified fluorocarbon resin layer, and the surface contact angle thereof is greater than or equal to 150 degrees; the elastic stripping layer is a thermoplastic polyurethane elastomer layer, and the Shore hardness A thereof is 30-50; the thickness of the elastic stripping layer is 2-3 times the thickness of the ultrahydrophobic anti-adhesion layer; the inner surface of the ultrahydrophobic anti-adhesion layer is provided with a spiral continuous protrusion; through the composite design of the ultrahydrophobic anti-adhesion layer, the elastic stripping layer and the spiral flow guide structure, the crystallization adhesion is significantly inhibited, self-cleaning is realized by utilizing fluid power, the mechanical stability and installation convenience of the lining are enhanced, the problem of resin pipeline fouling and blockage is effectively solved, the service life is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline transportation technology, and specifically discloses a self-cleaning and anti-crystallization lining structure for resin pipelines. Background Technology

[0002] In the chemical, environmental protection, and energy industries, resin pipes are widely used for transporting corrosive fluids or easily crystallizing media. However, the inner walls of traditional resin pipes are prone to media adhesion and crystallization deposits, leading to a reduction in the flow cross-sectional area, decreased transport efficiency, and even pipe blockage. Existing solutions often employ surface coatings or periodic chemical cleaning, but coatings are prone to peeling, cleaning costs are high, and they may damage the pipe itself. For example, ordinary PP-R pipes have a large inner wall roughness, requiring frequent maintenance after scale buildup; scale buildup in underfloor heating pipes significantly reduces heat exchange efficiency, and the cleaning process is cumbersome and can easily damage the pipe material.

[0003] Therefore, developing a long-lasting, self-cleaning, and anti-crystallization lining structure has become a pressing technical challenge for the industry. Utility Model Content

[0004] This invention proposes a self-cleaning anti-crystallization lining structure for resin pipes. Through the synergistic effect of a superhydrophobic anti-adhesion layer, an elastic peeling layer, and spiral protrusions, it can significantly reduce the adhesion and deposition of crystals, achieve self-cleaning of the pipe, extend the maintenance cycle, reduce energy consumption and costs, and at the same time improve the corrosion resistance, structural stability and sealing reliability of the pipe. It has excellent comprehensive performance and is economical and practical.

[0005] This invention is achieved as follows: a self-cleaning, anti-crystallization liner structure for resin pipes includes an inner liner body adapted to the inner wall of the resin pipe. The inner liner body is composed of a superhydrophobic anti-adhesion layer and an elastic release layer, which are tightly composited from the inside out. The superhydrophobic anti-adhesion layer is a nano-silica modified fluorocarbon resin layer with a surface contact angle ≥150°. The elastic release layer is a thermoplastic polyurethane elastomer layer with a Shore hardness of A30-50. The thickness of the elastic release layer is 2-3 times the thickness of the superhydrophobic anti-adhesion layer. The inner surface of the superhydrophobic anti-adhesion layer is provided with a continuous spiral protrusion, the height of which is 1 / 20-1 / 15 of the inner diameter, and the pitch is 1.5-2 times the inner diameter.

[0006] As a preferred embodiment of the self-cleaning and anti-crystallization lining structure for resin pipes of this utility model, the cross-section of the spiral continuous protrusion is an asymmetrical trapezoid, with its inclined surface facing the direction of the fluid in the pipe and an inclination angle of 15°-30°.

[0007] As a preferred embodiment of the self-cleaning and anti-crystallization lining structure for resin pipes of this utility model, a microporous transition layer with a pore size of 5-20 μm and a porosity of 30%-40% is provided between the superhydrophobic anti-adhesion layer and the elastic peeling layer, which is used to alleviate interlayer thermal stress and enhance bonding strength.

[0008] As a preferred embodiment of the self-cleaning and anti-crystallization lining structure for resin pipes of this utility model, the outer surface of the elastic peeling layer is coated with a carbon fiber woven mesh with a mesh count of 20-80.

[0009] As a preferred embodiment of the self-cleaning and anti-crystallization lining structure for resin pipes of this utility model, the overall thickness of the lining body is 1 / 10 to 1 / 8 of the inner diameter of the pipe.

[0010] As a preferred embodiment of the self-cleaning and anti-crystallization lining structure for resin pipes of this utility model, the two ends of the lining body are provided with annular flanges adapted to the pipe flanges, and the end faces of the annular flanges are provided with sealing grooves.

[0011] The beneficial effects of this utility model are:

[0012] The nano-silica-modified fluorocarbon resin layer achieves extremely low surface energy, effectively inhibiting the adhesion of crystal nuclei and reducing scaling sources; the elastic peeling layer absorbs fluid impact or crystal expansion stress through elastic deformation, preventing the lining from cracking or falling off and extending its service life; the spiral continuous convex structure forms turbulence, enhancing the shearing effect of the fluid on the pipe wall, actively peeling off microcrystalline particles, and achieving cleaning without external force.

[0013] Furthermore, the combination of the superhydrophobic layer and the spiral protrusions reduces the amount of crystal deposits on the inner wall of the pipe, significantly reducing the maintenance frequency; the composite structure of fluorocarbon resin and carbon fiber mesh extends the acid and alkali corrosion resistance of the lining; the fluid transport resistance is reduced, energy consumption is saved, and it is suitable for long-distance high-viscosity media transport. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the inner lining body of this utility model.

[0017] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the annular flange and sealing groove structure of this utility model.

[0019] The markings in the diagram are: 1. Inner liner body; 2. Superhydrophobic anti-adhesion layer; 3. Elastic peel layer; 4. Spiral continuous protrusions; 5. Microporous transition layer; 6. Carbon fiber woven mesh; 7. Annular flange; 8. Sealing groove; 9. Resin pipe. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0021] Please see Figure 1-4 The self-cleaning and anti-crystallization liner structure for resin pipes includes an inner liner body 1 adapted to the inner wall of the resin pipe. The inner liner body 1 is composed of a superhydrophobic anti-adhesion layer 2 and an elastic release layer 3, which are tightly composited from the inside to the outside. The superhydrophobic anti-adhesion layer 2 is a nano-silica modified fluorocarbon resin layer with a surface contact angle ≥150°. The elastic release layer 3 is a thermoplastic polyurethane elastomer layer with a Shore hardness of A30-50. The thickness of the elastic release layer 3 is 2-3 times the thickness of the superhydrophobic anti-adhesion layer 2. The inner surface of the superhydrophobic anti-adhesion layer 2 is provided with a spiral continuous protrusion 4. The height of the spiral continuous protrusion 4 is 1 / 20-1 / 15 of the inner diameter, and the pitch is 1.5-2 times the inner diameter.

[0022] In this embodiment: the self-cleaning and anti-crystallization of the resin pipe are achieved through the synergistic effect of the superhydrophobic anti-adhesion layer 2 and the elastic release layer 3. The superhydrophobic anti-adhesion layer 2 utilizes the superhydrophobic properties of nano-silica modified fluorocarbon resin (surface contact angle ≥150°) to significantly reduce the adhesion of crystals. The spiral continuous protrusions 4 on its surface guide the fluid to form turbulence, enhancing the flushing effect and reducing crystal retention. The elastic release layer 3 provides elastic support with thermoplastic polyurethane elastomer (Shore hardness A30-50), which generates micro-deformation when the fluid pressure fluctuates, breaking the bonding force between the attached crystals and the superhydrophobic layer, and promoting the crystals to fall off. At the same time, the thickness ratio of the elastic release layer 3 to the superhydrophobic anti-adhesion layer 2 (2-3 times) ensures both the elastic release effect and provides stable support for the superhydrophobic layer, jointly achieving the prevention of adhesion and dynamic removal of crystals on the inner wall of the pipe.

[0023] The nano-silica modified fluorocarbon resin layer has a surface contact angle ≥150°, forming a superhydrophobic interface similar to a lotus leaf, which significantly reduces the adhesion between crystals and the inner lining surface and makes it difficult for crystals to adhere. Combined with fluid flushing, it can achieve self-cleaning and reduce the frequency of manual cleaning.

[0024] Thermoplastic polyurethane elastomer (Shore hardness A30-50) provides elastic support and generates micro-deformation when fluid pressure fluctuates, which breaks the bonding force between the crystals and the superhydrophobic layer and can dynamically peel off the attached crystals to avoid the accumulation of hard scale. At the same time, it buffers the fluid impact and extends the service life of the lining.

[0025] The spiral continuous protrusions 4 induce the fluid to form turbulence, enhancing the scouring effect. The asymmetrical trapezoidal design of the cross section further optimizes the flow pattern, reduces the stagnation zone, increases the fluid scouring force, and reduces the amount of crystal deposition.

[0026] As a technical optimization of this utility model, the cross-section of the spiral continuous protrusion 4 is an asymmetrical trapezoid, and its inclined surface faces the direction of the fluid in the pipe with an inclination angle of 15°-30°.

[0027] In this embodiment, the spiral protrusion inclined surface optimizes fluid dynamics, increasing turbulence intensity by 20% and improving crystal stripping efficiency.

[0028] As a technical optimization of this utility model, a microporous transition layer 5 with a pore size of 5-20μm and a porosity of 30%-40% is provided between the superhydrophobic anti-adhesion layer 2 and the elastic peeling layer 3 to relieve interlayer thermal stress and enhance bonding strength.

[0029] In this embodiment, the transition layer with a pore size of 5-20 μm and a porosity of 30%-40% can alleviate the thermal stress and material property differences between the superhydrophobic layer and the elastic layer, enhance the interfacial bonding force, improve the interlayer shear strength, and prevent delamination failure.

[0030] As a technical optimization of this utility model, the outer surface of the elastic peeling layer 3 is coated with a carbon fiber woven mesh 6, with a mesh count of 20-80 mesh.

[0031] In this embodiment, the carbon fiber woven mesh 6 enhances the structural rigidity and plays a role in uniformly distributing the load, thereby reducing the radial deformation of the inner lining body 1.

[0032] As a technical optimization of this utility model, the overall thickness of the inner lining body 1 is 1 / 10 to 1 / 8 of the inner diameter of the pipe.

[0033] In this embodiment, the overall thickness of the inner lining body 1 is such that the amount of material used is reduced while ensuring structural strength.

[0034] As a technical optimization of this utility model, the two ends of the inner lining body 1 are provided with annular flanges 7 adapted to pipe flanges, and the end face of the annular flanges 7 is provided with sealing grooves 8.

[0035] In this embodiment: by opening a sealing groove 8 on the end face of the annular flange 7, the sealing groove 8 improves the tolerance for installation errors and enhances the sealing reliability.

[0036] Working principle and usage process of this utility model:

[0037] The superhydrophobic layer reduces crystal adhesion through a high contact angle, the spiral protrusions induce turbulent scouring of the inner wall, and the elastic layer undergoes micro-deformation when the fluid pressure fluctuates. These three elements work together to achieve dynamic peeling. When crystals adhere, changes in fluid pressure cause the elastic layer to expand locally, disrupting the physical adsorption between the crystals and the superhydrophobic layer. The microporous transition layer 5 allows for slight relative displacement between the superhydrophobic layer and the elastic layer, avoiding stress concentration. The carbon fiber mesh provides rigid support, preventing excessive deformation of the elastic layer that could lead to structural failure. The liner is bolted to the pipe flange via an annular flange 7, and the sealing groove 8 ensures no leakage. During daily operation, disassembly is not required; crystals are discharged with the fluid, extending the maintenance cycle by 3-5 times.

[0038] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A self-cleaning, anti-crystallization lining structure for resin pipes, characterized in that, The system includes an inner lining body (1) adapted to the inner wall of a resin pipe. The inner lining body (1) is composed of a superhydrophobic anti-adhesion layer (2) and an elastic release layer (3) that are tightly composited from the inside to the outside. The superhydrophobic anti-adhesion layer (2) is a nano-silica modified fluorocarbon resin layer with a surface contact angle ≥150°. The elastic release layer (3) is a thermoplastic polyurethane elastomer layer with a Shore hardness of A30-50. The thickness of the elastic release layer (3) is 2-3 times the thickness of the superhydrophobic anti-adhesion layer (2). The inner surface of the superhydrophobic anti-adhesion layer (2) is provided with a spiral continuous protrusion (4). The height of the spiral continuous protrusion (4) is 1 / 20-1 / 15 of the inner diameter, and the pitch is 1.5-2 times the inner diameter.

2. The self-cleaning and anti-crystallization lining structure for resin pipes according to claim 1, characterized in that: The cross-section of the spiral continuous protrusion (4) is an asymmetrical trapezoid, with its inclined surface facing the direction of the fluid in the pipe and an inclination angle of 15°-30°.

3. The self-cleaning and anti-crystallization lining structure for resin pipes according to claim 1, characterized in that: A microporous transition layer (5) with a pore size of 5-20 μm and a porosity of 30%-40% is provided between the superhydrophobic anti-adhesion layer (2) and the elastic peeling layer (3) to relieve interlayer thermal stress and enhance bonding strength.

4. The self-cleaning and anti-crystallization lining structure for resin pipes according to claim 1, characterized in that: The outer surface of the elastic peel layer (3) is coated with a carbon fiber woven mesh (6), with a mesh count of 20-80.

5. The self-cleaning and anti-crystallization lining structure for resin pipes according to claim 1, characterized in that: The overall thickness of the inner lining body (1) is 1 / 10 to 1 / 8 of the inner diameter of the pipe.

6. The self-cleaning and anti-crystallization lining structure for resin pipes according to claim 1, characterized in that: The inner lining body (1) has annular flanges (7) at both ends that are adapted to pipe flanges, and the end face of the annular flanges (7) is provided with sealing grooves (8).

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