Shell-shaped inner wall layer-attached pipeline and processing technology thereof

Abstract

The shell-shaped inner wall layer-attached pipeline comprises a conveying pipeline, and the inner wall of the conveying pipeline is sequentially connected with a welding layer, a woven mesh and a shell hydrophobic layer from outside to inside; the shell hydrophobic layer comprises a plurality of independent shell pieces of a blade-shaped structure, and the shell pieces are hinged to the surface of the inner side of the woven mesh in a staggered-layer or tiled mode. The problems of pipeline blockage, conveying efficiency reduction, cleaning difficulty and the like caused by condensation in the concrete conveying process can be effectively solved, and the functions of low adhesion of concrete and the pipe wall, self-adaptive flow guide and long-acting anti-condensation are achieved.

Description

Technical Field

[0001] This invention belongs to the field of concrete conveying pipeline technology, specifically relating to a shell-shaped inner wall attached pipeline and its processing technology. Background Technology

[0002] In the field of concrete conveying technology, the inner wall of pipelines is prone to blockage due to concrete setting, which seriously affects construction efficiency and equipment lifespan. During the conveying process, due to cement hydration, water evaporation, and adhesion to the pipe wall, a solidified layer easily forms on the inner wall, especially in long-distance, intermittent operations or high-temperature environments. Setting not only increases conveying resistance and energy consumption, but also leads to a reduction in the effective pipe diameter, an increase in pumping pressure, and even complete blockage, causing construction interruptions and difficulties in cleaning.

[0003] To alleviate the setting problem, existing technologies often use internal wall coatings (such as epoxy resin or polyethylene coatings) or improve the smoothness of the pipe wall to reduce adhesion. However, these methods are easily worn and peeled off under the scouring of concrete aggregates, and their durability is limited. Some solutions use surface microstructures or hydrophobic coatings, which can temporarily delay setting, but they cannot adapt to changes in the rheological properties of concrete, and their hydrophobic properties degrade after repeated use, resulting in high maintenance costs.

[0004] Currently, there is a lack of an internal wall structure solution that can both prevent condensation for a long time and have self-adaptive cleaning capabilities. Summary of the Invention

[0005] The purpose of this invention is to provide a shell-shaped inner wall coated pipe and its processing technology, which can effectively solve the problems of pipe blockage, reduced conveying efficiency and difficulty in cleaning caused by concrete solidification during the conveying process, and achieve low adhesion between concrete and pipe wall, adaptive flow guidance and long-term anti-solidification function.

[0006] To achieve the above objectives, the present invention provides a shell-shaped inner wall layered pipe, including a conveying pipe, wherein the inner wall of the conveying pipe is sequentially connected with a welded layer, a woven mesh and a shell hydrophobic layer from the outside to the inside; The hydrophobic layer of the shell consists of several independent leaf-like shell plates, which are flipped and connected to the inner surface of the woven mesh in a staggered or flat manner.

[0007] As a further aspect of the present invention: the end of the shell plate is provided with a flip connector, and the inner surface of the woven mesh is connected with a flip base that cooperates with the flip connector.

[0008] As a further aspect of the present invention: the shell sheet is hollow inside.

[0009] As a further aspect of the present invention: the woven mesh is a mesh structure made of nylon fibers woven in warp and weft, and its mesh size matches the size of the shell pieces.

[0010] As a further aspect of the present invention: the welding layer is formed by high-temperature melting and welding of a material compatible with the conveying pipeline, which firmly bonds the woven mesh to the inner wall surface of the conveying pipeline.

[0011] As a further aspect of the present invention: the inner surface of the conveying pipeline, the welded layer, and the outer surface of the woven mesh are also coated with an anti-corrosion coating, the thickness of which is not higher than 150μm.

[0012] To achieve the above objectives, the present invention also provides a processing method for a shell-shaped inner wall coated pipe, comprising the following steps: S1. Prepare shell pieces and woven mesh, and fix the shell pieces to the woven mesh by flipping and connecting to form a shell-woven mesh composite liner; S2. The inner wall of the conveying pipeline is sandblasted to remove rust, so that its surface is clean and reaches the preset roughness. S3. Apply adhesive welding paste evenly to the bottom of the shell-woven mesh composite inner substrate obtained in step S1, roll it into a cylindrical shape, place it inside the conveying pipe, and temporarily fix it to the inner wall of the conveying pipe. S4. The conveying pipe is heated by a magnetic ring to form a welded layer along the axial or circumferential direction of the conveying pipe, and the woven mesh is fixed to the inner wall of the conveying pipe. S5. Clean the conveying pipeline in sequence with acetone, deionized water and dilute hydrochloric acid solution to remove impurities left by welding, and then put it into the drying oven for drying. Under nitrogen protection, an adhesive layer with a thickness of no more than 1 mm is sprayed onto the hydrophobic shell layer inside the conveying pipeline; finally, a superhydrophobic material is applied to form a superhydrophobic layer on the surface of the hydrophobic shell layer, and then dried and cured. S6. Seal the ends of the conveying pipe and apply an outer layer of paint.

[0013] As a further aspect of the present invention: the superhydrophobic material is a hydrophobic nano-silica composite material.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The shell hydrophobic layer, through staggered or flat arrangement, effectively reduces the resistance to concrete transport and minimizes the formation of the set layer; The shell-shaped plates can be flipped 180° inside the delivery pipeline through a flipping connection. The angle can be adaptively adjusted according to the concrete flow direction to form a dynamic cleaning effect and reduce the accumulation of hardened concrete. The woven mesh and welded layer structure is simple and easy to install, which improves the feasibility of the process.

[0015] This invention is particularly suitable for concrete conveying scenarios: The staggered arrangement of the shell flakes can guide the flow of concrete, reduce local stagnation, and delay setting; Superhydrophobic layers can significantly reduce the adhesion between cement paste and pipe walls in concrete; The shell fragments can adaptively flip with the direction of concrete flow, creating a dynamic cleaning effect and reducing the accumulation of hardened concrete; The structural design of the woven mesh and welded layers enhances the impact resistance and durability of the lining, allowing it to withstand the erosion of aggregates in the concrete. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the shell-shaped inner wall attached pipe of the present invention.

[0017] Figure 2 This is a front view of the shell-shaped inner wall layered pipe of the present invention.

[0018] Figure 3 This is a side view of the shell-shaped inner wall layered pipe of the present invention.

[0019] Figure 4 This is a cross-sectional view of the shell-shaped inner wall layered pipe of the present invention.

[0020] Figure 5 This is a diagram showing the staggered arrangement of the hydrophobic layers of the shell-shaped inner wall of the conduit of the present invention.

[0021] Figure 6 This is a diagram showing the sequential arrangement of the hydrophobic layers of the shell-shaped inner wall of the conduit of the present invention.

[0022] Figure 7 This is a diagram showing other shapes of the shell-shaped inner wall attached pipe of the present invention.

[0023] In the diagram: 1. Hydrophobic layer of the seashell, 2. Woven mesh, 3. Welded layer, 4. Delivery pipe; 1-1. Shell plate; 1-2. Flip connector; 2-1. Flip the base. Detailed Implementation

[0024] The present invention will be further illustrated by the following examples.

[0025] like Figure 1 As shown, a shell-shaped inner wall attached pipe includes a conveying pipe 4, and the inner wall of the conveying pipe 4 is connected from the outside to the inside in sequence with a welded layer 3, a woven mesh 2 and a shell hydrophobic layer 1. The hydrophobic layer 1 of the shell includes several independent leaf-shaped shell plates 1-1, which are hinged to the inner surface of the woven mesh 2 in a staggered or flat manner.

[0026] The shell plates are arranged in a 1-1 pattern, such as... Figure 5 The diagram shown illustrates the staggered arrangement of the hydrophobic layer 1 of the shell, as follows: Figure 6The diagram shown illustrates the sequential arrangement of the hydrophobic layer 1 of the shell. Figure 7 The diagram shows other shapes and arrangements.

[0027] To achieve the hinged connection between the shell plate 1-1 and the woven mesh 2, further, such as Figures 2-4 As shown, the end of the shell plate 1-1 is provided with a flip connector 1-2, and the inner surface of the woven mesh 2 is connected to a flip base that mates with the flip connector 1-2. The shell plate 1-1 rotates as follows: Figure 1 The two shell plates on the middle side are shown in Figure 1-1.

[0028] Furthermore, the shell sheet 1-1 is hollow inside and has a relatively light overall weight. It can dynamically adjust the direction of the shell sheet 1-1 to adapt to the flow direction of concrete in the conveying pipeline 4, thereby achieving the purpose of delaying setting and self-cleaning.

[0029] In order to enable the shell pieces 1-1 to be arranged as needed, the woven mesh 2 is a mesh structure made of nylon fibers woven in warp and weft, and its mesh size matches the size of the shell pieces 1-1, for regular arrangement and fixed support of the shell pieces 1-1.

[0030] Furthermore, the welding layer 3 is formed by high-temperature melting and welding of a material compatible with the conveying pipe 4, which firmly bonds the woven mesh 2 to the inner wall surface of the conveying pipe 4.

[0031] Furthermore, the inner surface of the conveying pipe 4, the welded layer 3, and the outer surface of the braided mesh 2 are coated with an anti-corrosion coating. The thickness of the anti-corrosion coating is not higher than 150μm, and the preferred anti-corrosion coating is an epoxy glass flake coating.

[0032] A manufacturing process for a shell-shaped inner wall-attached pipe includes the following steps: S1. Prepare shell pieces 1-1 and woven mesh 2, and fix shell pieces 1-1 onto woven mesh 2 by flipping and connecting them to form a shell-woven mesh composite liner; S2. The inner wall of the conveying pipe 4 is sandblasted to remove rust, so that its surface is clean and reaches the preset roughness Ra1.5-2.0μm; S3. Apply adhesive welding paste evenly to the bottom of the shell-woven mesh composite inner substrate obtained in step S1, roll it into a cylindrical shape, and place it inside the conveying pipe 4 to make it adhere to the inner wall of the conveying pipe 4 and temporarily fix it. S4. The conveying pipe 4 is heated by a magnetic ring, preferably at a temperature of 120°C, to form a welded layer 3 along the axial or circumferential direction of the conveying pipe 4, and the braided mesh 2 is fixed to the inner wall of the conveying pipe 4. S5. The conveying pipeline 4 is cleaned with acetone, deionized water and dilute hydrochloric acid solution in sequence to remove the impurities left by welding, and then placed in the drying oven for drying. Under nitrogen protection, an adhesive layer with a thickness not exceeding 1 mm is sprayed onto the shell hydrophobic layer 1 inside the conveying pipeline 4; finally, a superhydrophobic material is applied to form a superhydrophobic layer on the surface of the shell hydrophobic layer 1 with a water contact angle greater than 150°, and then dried and cured; preferably, the superhydrophobic material is a hydrophobic nano silica composite material, which has high wear resistance and alkali resistance, and can adapt to the high alkalinity environment of concrete and aggregate erosion; S6. Seal the ends of the conveying pipe and apply an outer layer of paint.

Claims

1. A shell-shaped inner wall coated pipe, comprising a conveying pipe (4), characterized in that, The inner wall of the conveying pipe (4) is connected from the outside to the inside by a welded layer (3), a woven mesh (2) and a seashell hydrophobic layer (1); The hydrophobic layer (1) of the shell includes several independent leaf-shaped shell plates (1-1), which are flipped and connected to the inner surface of the woven mesh (2) in a staggered or flat manner.

2. The shell-shaped inner wall coated pipe according to claim 1, characterized in that, The shell plate (1-1) is provided with a flip connector (1-2) at the end, and the inner surface of the woven mesh (2) is connected with a flip base (2-1) that cooperates with the flip connector (1-2).

3. A shell-shaped inner wall coated pipe according to claim 2, characterized in that, The shell fragment (1-1) is hollow inside.

4. A shell-shaped inner wall-attached pipe according to any one of claims 1-3, characterized in that, The woven mesh (2) is a mesh structure made of nylon fibers woven in warp and weft, and its mesh size matches the size of the shell pieces (1-1).

5. A shell-shaped inner wall coated pipe according to any one of claims 1-3, characterized in that, The welding layer (3) is formed by high-temperature melting welding of a material compatible with the conveying pipe (4), which firmly binds the woven mesh (2) to the inner wall surface of the conveying pipe (4).

6. A shell-shaped inner wall-attached pipe according to any one of claims 1-3, characterized in that, The inner surface of the conveying pipe (4), the welded layer (3) and the outer surface of the braided mesh (2) are also coated with an anti-corrosion coating, the thickness of which is no more than 150μm.

7. A processing technology for a shell-shaped inner wall-attached pipe, characterized in that, Includes the following steps: S1. Prepare shell pieces (1-1) and woven mesh (2), and fix the shell pieces (1-1) onto the woven mesh (2) by flipping and connecting to form a shell-woven mesh composite liner; S2. The inner wall of the conveying pipe (4) is sandblasted to remove rust, so that its surface is clean and reaches the preset roughness. S3. Apply adhesive welding paste evenly to the bottom of the shell-woven mesh composite inner lining obtained in step S1, roll it into a cylindrical shape, and place it inside the conveying pipe (4) to make it adhere to the inner wall of the conveying pipe (4) and temporarily fix it. S4. The conveying pipe (4) is heated by a magnetic ring to form a welded layer (3) along the axial or circumferential direction of the conveying pipe (4), and the braided mesh (2) is fixed to the inner wall of the conveying pipe (4); S5. The conveying pipeline (4) is cleaned with acetone, deionized water and dilute hydrochloric acid solution in sequence to remove the impurities left by welding, and then placed in the drying oven for drying. Under nitrogen protection, an adhesive layer with a thickness of no more than 1 mm is sprayed onto the shell hydrophobic layer (1) inside the conveying pipe (4); finally, a superhydrophobic material is applied to form a superhydrophobic layer on the surface of the shell hydrophobic layer (1), and then dried and cured. S6. Seal the end of the conveying pipe (4) and apply an outer layer of paint.

8. The processing technology of a shell-shaped inner wall attached pipe according to claim 7, characterized in that, The superhydrophobic material is made of hydrophobic nano-silica composite material.

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