A mixed transport pipe having an erosion resistant coating

Abstract

The utility model belongs to the technical field of mixed pipeline, disclose a kind of mixed pipeline with erosion-resistant coating, including pipeline base body and the erosion-resistant coating structure being set on the inner wall of pipeline base body, and the inner wall of pipeline base body is provided with anchoring structure;Erosion-resistant coating structure includes the transition layer being combined with the inner wall of pipeline base body and the functional wear layer being covered on transition layer, and transition layer fills and mechanically fits in anchoring structure, and anchoring structure is the blind hole of uniform array distribution, and the depth of blind hole is 0.5-2mm, and diameter is 1-3mm, and transition layer is the metal material layer of porous structure, and functional wear layer is the metal matrix composite material layer of high hardness ceramic particle reinforcement.The utility model is cooperated by anchoring structure and porous transition layer, forms the double combination mechanism of mechanical fitting and material penetration, fundamentally solves the early failure problem caused by the insufficient interface bonding force of traditional coating, especially applicable to the mixed pipeline environment of high erosion, high shear force.

Description

Technical Field

[0001] This utility model relates to the field of mixed-transport pipeline technology, and in particular to a mixed-transport pipeline with an anti-erosion coating. Background Technology

[0002] In the fields of petroleum, natural gas, chemical and mining, mixed-transport pipelines are widely used to transport fluid media containing solid particles (such as sand, catalyst powder, coal powder, etc.). Under the influence of high-speed fluid, these solid particles will cause severe erosion and wear on the inner wall of the pipeline, especially at elbows, tees and diameter changes, resulting in thinning and perforation of the pipe wall, causing media leakage, environmental pollution and even safety accidents, seriously affecting the service life of the pipeline and production safety.

[0003] Currently, the main anti-erosion technologies include: 1) manufacturing pipes using integral high-hardness, high-wear-resistant materials (such as high-chromium cast iron and ceramic composite pipes). This method is costly, has a complex manufacturing process, and often lacks sufficient toughness; 2) welding wear-resistant mesh or overlaying wear-resistant layers onto the inner wall of the pipe. This method is prone to generating thermal stress, leading to a decline in the performance of the base material, and uneven surfaces may cause new erosion problems; 3) spraying or pasting wear-resistant coatings (such as tungsten carbide and alumina ceramic coatings) onto the inner wall of the pipe. This is currently a relatively economical and effective method.

[0004] However, existing coating technologies have obvious drawbacks. The bonding between the coating and the pipeline substrate mainly relies on intermolecular forces (physical bonding) or limited metallurgical bonding (such as spraying). Under long-term, high-intensity particle erosion and fluid shear forces, the coating is prone to cracking and peeling at the interface. Once the coating fails locally, the exposed substrate will wear down faster. Therefore, we propose a mixed-transport pipeline with an anti-erosion coating. Utility Model Content

[0005] To address the technical problems existing in the current coating technology described in the background section, this utility model provides the following technical solution: A mixed-transport pipeline with an anti-erosion coating includes a pipeline substrate and an anti-erosion coating structure disposed on the inner wall of the pipeline substrate, wherein an anchoring structure is disposed on the inner wall of the pipeline substrate. The erosion-resistant coating structure includes a transition layer bonded to the inner wall of the pipe substrate and a functional wear-resistant layer covering the transition layer, wherein the transition layer fills and is mechanically fitted into the anchoring structure.

[0006] As a technical solution for a mixed-transport pipeline with an anti-erosion coating as described in this utility model, the anchoring structure consists of blind holes distributed in a uniform array.

[0007] As a technical solution for a mixed-transport pipeline with an anti-erosion coating according to the present invention, the depth of the blind hole is 0.5-2mm and the diameter is 1-3mm.

[0008] As a technical solution for a mixed-transport pipeline with an anti-erosion coating according to the present invention, the transition layer is a porous metal material layer, the functional wear-resistant layer is a metal matrix composite material layer reinforced with high-hardness ceramic particles, and part of the material of the functional wear-resistant layer permeates into the pores of the transition layer.

[0009] As a technical solution for a mixed-transport pipeline with an anti-erosion coating according to the present invention, wherein: the transition layer and the pipeline substrate form a mechanical interlocking mechanism through the anchoring structure.

[0010] As a technical solution of the mixed-transport pipeline with anti-erosion coating described in this utility model, flanges are provided at the ends of the pipeline substrate.

[0011] As a technical solution for a mixed-transport pipeline with an anti-erosion coating according to the present invention, the material of the transition layer is a nickel-based or cobalt-based self-fluxing alloy.

[0012] As a technical solution for a mixed-transport pipeline with an anti-erosion coating according to the present invention, the material of the functional wear-resistant layer is a nickel-based or iron-based composite material reinforced with tungsten carbide or chromium carbide particles.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through the synergistic design of the anchoring structure and the porous transition layer, forms a dual combination mechanism of mechanical interlocking and material penetration, fundamentally solving the problem of early failure caused by insufficient interfacial bonding of traditional coatings, and is especially suitable for mixed-transport pipeline environments with high erosion and high shear force.

[0014] 2. This utility model, through the combination of gradient composite coating structure and optimized material system, ensures high wear resistance while avoiding brittle cracking. Furthermore, by combining standardized blind hole parameters with flange connection design, it can further improve engineering applicability and maintenance efficiency and reduce overall costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall main structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 This is a schematic diagram of the internal structure of the pipe base of this utility model.

[0019] Explanation of reference numerals in the attached figures: In the diagram: 1. Pipe base; 2. Transition layer; 3. Functional wear-resistant layer; 4. Anchoring structure; 5. Flange. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-4 A mixed transport pipeline with an anti-erosion coating is provided. The mixed transport pipeline with an anti-erosion coating includes a pipeline substrate 1 and an anti-erosion coating structure disposed on the inner wall of the pipeline substrate 1. The pipeline substrate 1 is made of carbon steel or stainless steel, and an anchoring structure 4 is disposed on the inner wall of the pipeline substrate 1. The anti-erosion coating structure includes a transition layer 2 bonded to the inner wall of the pipe substrate 1 and a functional wear-resistant layer 3 covering the transition layer 2. The transition layer 2 is set using a plasma spraying process and is filled and mechanically embedded in the anchoring structure 4. In application, the mechanical embedding enhances the bonding force between the anti-erosion coating structure and the pipe substrate 1, avoiding the peeling problem caused by insufficient interfacial bonding of traditional coatings (such as failure under erosion or fluid shear force). At the same time, the transition layer 2 acts as a buffer layer to alleviate the difference in physical properties (such as coefficient of thermal expansion and hardness) between the functional wear-resistant layer 3 and the pipe substrate 1, reducing interfacial stress. In combination with the functional wear-resistant layer 3, it can directly resist the erosion of solid particles and extend the service life of the pipe substrate 1.

[0022] Reference Figures 1-4 The anchoring structure 4 consists of a uniform array of blind holes with a depth of 0.5-2 mm and a diameter of 1-3 mm. These holes are prepared on the inner wall of the pipe substrate 1 using a laser drilling machine, and the spacing between the holes is 2-3 times the diameter. In application, the uniform array distribution of the blind holes ensures that the coating is subjected to uniform stress and avoids local stress concentration. At the same time, the design of the blind hole depth (0.5-2 mm) and diameter (1-3 mm) parameters ensures sufficient anchoring force while avoiding excessive weakening of the strength of the pipe substrate 1, thus balancing structural reliability and manufacturing feasibility.

[0023] Reference Figure 2 and Figure 3 The transition layer 2 is a porous metal material layer, and the functional wear-resistant layer 3 is a metal matrix composite material layer reinforced with high-hardness ceramic particles. Some of the material in the functional wear-resistant layer 3 penetrates into the pores of the transition layer 2. In application, the porous structure of the transition layer 2 allows the material in the functional wear-resistant layer 3 to penetrate into it, forming a dual combination of mechanical and metallurgical properties, which significantly improves the interlayer bonding strength. At the same time, the wear resistance is improved by high-hardness ceramic particles (such as tungsten carbide), while the metal matrix maintains toughness, avoiding the risk of brittle cracking of pure ceramic coatings.

[0024] Reference Figures 2-4 The transition layer 2 and the pipe substrate 1 form a mechanical interlocking mechanism through the anchoring structure 4. In application, the mechanical interlocking between the anchoring structure 4 and the transition layer 2 replaces the traditional method of relying on molecular forces or limited metallurgical bonding, which greatly improves the coating's anti-peeling ability in long-term erosion environment.

[0025] Reference Figure 1 , Figure 2 as well as Figure 4 Flanges 5 are provided at the ends of the pipe base 1. In application, the flange 5 design facilitates quick connection and maintenance of the pipe base 1, adapts to the needs of industrial sites, and improves practicality.

[0026] Reference Figures 1-4 The material of the transition layer 2 is a nickel-based or cobalt-based self-fluxing alloy. In application, a transition layer material (nickel-based / cobalt-based self-fluxing alloy) with high wettability and low melting point is used to ensure good bonding with the pipe substrate 1 and low thermal stress.

[0027] Reference Figures 1-4 The material of the functional wear-resistant layer 3 is a nickel-based or iron-based composite material reinforced with tungsten carbide or chromium carbide particles. In application, the design of the functional layer material (carbide-reinforced nickel-based / iron-based composite material) optimizes wear resistance and cost. At the same time, the nickel-based material is corrosion-resistant and the iron-based material is economical, so as to adapt to different working conditions.

[0028] This invention provides a mixed-transport pipeline with an anti-erosion coating. Through the synergistic design of the anchoring structure 4 and the porous transition layer 2, a dual combination mechanism of mechanical interlocking and material penetration is formed, fundamentally solving the problem of early failure caused by insufficient interfacial bonding of traditional coatings. It is especially suitable for mixed-transport pipeline environments with high erosion and high shear force. At the same time, through the combination of gradient composite coating structure and optimized material system, high wear resistance is ensured while brittle cracking is avoided. Combined with the standardized blind hole parameters and flange connection design, the engineering applicability, maintenance efficiency and overall cost can be further improved.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mixed transport pipeline having an erosion resistant coating, comprising a pipeline base (1) and an erosion resistant coating structure arranged on the inner wall of the pipeline base (1), characterized in that: An anchoring structure (4) is provided on the inner wall of the pipe base (1). The erosion-resistant coating structure includes a transition layer (2) bonded to the inner wall of the pipe substrate (1) and a functional wear-resistant layer (3) covering the transition layer (2), wherein the transition layer (2) is filled and mechanically fitted into the anchoring structure (4).

2. The mixed flow conduit having an erosion resistant coating of claim 1, wherein: The anchoring structure (4) consists of blind holes distributed in a uniform array.

3. The mixed-transport pipeline with an anti-erosion coating according to claim 2, characterized in that: The depth of the blind hole is 0.5-2mm and the diameter is 1-3mm.

4. The mixed flow conduit having an erosion resistant coating of claim 1, wherein: The transition layer (2) is a porous metal material layer, and the functional wear-resistant layer (3) is a metal matrix composite material layer reinforced with high-hardness ceramic particles. Part of the material of the functional wear-resistant layer (3) permeates into the pores of the transition layer (2).

5. The mixed flow conduit having an erosion resistant coating of claim 1, wherein: The transition layer (2) and the pipeline substrate (1) form a mechanical interlocking mechanism through the anchoring structure (4).

6. The mixed flow conduit having an erosion resistant coating of claim 1, wherein: The ends of the pipe base (1) are all provided with flanges (5).

7. The mixed-transport pipeline with an anti-erosion coating according to any one of claims 1 to 6, characterized in that: The material of the transition layer (2) is a nickel-based or cobalt-based self-fluxing alloy.

8. A mixed flow pipe having an erosion resistant coating according to any one of claims 1 to 6, characterized in that: The material of the functional wear-resistant layer (3) is a nickel-based or iron-based composite material reinforced with tungsten carbide or chromium carbide particles.

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