一种盾构机用高耐磨泥浆管道

By combining a laser cladding layer and an HVOF spray coating on the inner wall of the slurry pipe of the tunnel boring machine, along with reinforcing ribs, the problem of severe wear on the slurry pipe of large-diameter tunnel boring machines during hard rock excavation was solved, achieving a construction effect with high wear resistance and impact resistance.

CN224516277UActive Publication Date: 2026-07-17CHINA RAILWAY SUNWARD ENG EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA RAILWAY SUNWARD ENG EQUIP CO LTD
Filing Date
2025-09-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Large-diameter tunnel boring machines suffer severe wear on their slurry pipes during hard rock excavation. Traditional methods of thickening the pipes increase weight and still pose a risk of wear. Furthermore, existing materials are prone to chipping under impact, making it difficult to meet the needs of long-distance construction.

Method used

The wear-resistant layer is composed of a laser cladding layer and an HVOF spray coating. The laser cladding layer provides a high-toughness matrix, while the HVOF spray coating reduces the coefficient of friction. Combined with reinforcing ribs, this forms a highly wear-resistant and impact-resistant mud pipe.

Benefits of technology

It significantly improves the wear resistance and impact strength of mud pipes, reduces usage and consumption, lowers the wear rate, and is suitable for on-site construction.

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Abstract

本实用新型提供一种盾构机用高耐磨泥浆管道，包括管道本体，管道本体的内壁表面设置有耐磨层，其中耐磨层由激光熔覆层和HVOF喷涂层复合而成，激光熔覆层设置于管道本体的内壁，激光熔覆层的表面设置有HVOF喷涂层，由激光熔覆层和HVOF喷涂层复合而成的耐磨层，其表面硬度极高，耐磨性能优越，能够有效降低刚才的使用与消耗，同时耐磨层的抗冲击硬度高，不容易掉块，而且耐磨层的复合方式可以直接应用于现场施工。
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Claims

1. A high abrasion resistant slurry pipe for a tunneling machine comprising a pipe body (1), characterized in that: The inner wall surface of the pipe body (1) is provided with a wear-resistant layer, which is composed of a laser cladding layer (2) and an HVOF spray coating layer (3). The laser cladding layer (2) is provided on the inner wall of the pipe body (1), and the surface of the laser cladding layer (2) is provided with an HVOF spray coating layer (3). The laser cladding layer (2) provides a high-toughness matrix to resist impact peeling, and the HVOF spray coating layer (3) reduces the friction coefficient and resists abrasive cutting. Both ends of the pipe body (1) are provided with flanges (4) for pipe connection, and the outer wall of the pipe body (1) is welded with reinforcing ribs (5).

2. The high abrasion resistant slurry pipeline for a tunneling machine of claim 1, wherein: The laser cladding layer (2) is a nickel-based tungsten carbide alloy, and the HVOF spray coating layer (3) is a composite ceramic of nanostructured alumina and titanium dioxide.

3. The high abrasion resistant slurry pipeline for a tunneling machine of claim 1, wherein: The thickness of the laser cladding layer (2) is 1.5±0.2mm, and the thickness of the HOVF spray coating layer is 0.8±0.1mm.

4. The high abrasion resistant slurry pipeline for a tunneling machine of claim 1, wherein: The laser cladding layer (2) and the HVOF spraying layer (3) are applied to the inner wall of the pipe body (1) through a dual composite process of laser cladding and supersonic flame spraying.