Anti-impact composite anti-abrasion pipeline

Abstract

The utility model relates to the technical field of particle conveying pipelines, in particular to an anti-impact composite type anti-abrasion pipeline. Comprising an inlet straight section, an elbow section and an outlet straight section which are sequentially connected, each of the inlet straight section and the outlet straight section comprises an inner silicon carbide ceramic tube and an outer first steel tube, and the elbow section comprises an inner impact-resistant metal layer and an outer second steel tube. The flow resistance of materials in the pipeline is reduced through the ceramic linings of the inlet straight section and the outlet straight section, the conveying efficiency is improved, the stability at high temperature is high, the impact resistance of the elbow part is guaranteed through the impact-resistant metal layer, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of particle conveying pipelines, in particular to an impact-proof composite anti-wear pipeline. Background Art

[0002] Gas-solid two-phase flow transmission pipeline in thermal power plant, medium working temperature: 100℃ (maximum 360℃), medium flow rate: normal flow rate 18-28m / s, wear-resistant elbows are required to be suitable for medium environments with high-speed (35m / s) gas-powder scouring.

[0003] The prior art CN200320111035.X discloses a wear-resistant elbow lined with ceramic elbow short sections, in which a plurality of ceramic elbow short sections are bonded to the inner wall of a steel pipe body, and both ends of the steel pipe body have an integral welded joint to limit and protect the side-by-side ceramic elbow short sections; the coal powder fineness is R90=6-12%, which belongs to the working condition of strong wear of small particle materials, and is suitable for the wear-resistant lining of the elbow part using ceramic in the prior art, but for other working conditions, for example, under the working conditions of material transportation with high temperature and large particles, such as heavy medium coal washing, water slag flushing pipeline, etc., the ceramic at the elbow part is seriously damaged under the impact of large particles, which affects the service life of the pipe elbow. Utility Model Content

[0004] The utility model aims to solve the above problems, thereby providing an impact-proof composite anti-wear pipeline which can prevent damage to the elbow.

[0005] The utility model solves the above problems and adopts the following technical solutions:

[0006] An impact-proof composite anti-wear pipeline comprises an inlet straight section, an elbow section and an outlet straight section which are connected in sequence. The inlet straight section and the outlet straight section both comprise an inner silicon carbide ceramic tube and an outer first steel tube. The elbow section comprises an inner impact-resistant metal layer and an outer second steel tube.

[0007] Compared with the prior art, the utility model adopting the above technical solution has the following outstanding features:

[0008] The ceramic lining of the inlet and outlet straight sections reduces the flow resistance of the material in the pipeline, improves the conveying efficiency, and has high stability at high temperatures. The impact-resistant metal layer ensures the impact resistance of the elbow and extends the service life of the pipeline.

[0009] As a preferred embodiment, a further technical solution of the utility model is:

[0010] Furthermore, wear-resistant mortar is filled between the silicon carbide ceramic tube and the first steel tube.

[0011] Furthermore, the annular gap between the silicon carbide ceramic tube and the impact-resistant metal layer is filled with wear-resistant cement.

[0012] Furthermore, at least three positioning blocks are equidistantly arranged in the annular direction between the end of the silicon carbide ceramic tube and the first steel tube.

[0013] Furthermore, the inlet straight section, the elbow section and the outlet straight section adopt an eccentric structure in which the outer arc side is thick and the inner arc side is thin along the elbow direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure in the A direction;

[0016] Figure 3 for Figure 1 A magnified schematic diagram of the local structure of B;

[0017] Marked in the figure are: inlet straight section 1, elbow section 2, outlet straight section 3, silicon carbide ceramic tube 4, first steel tube 5, impact-resistant metal layer 6, second steel tube 7, wear-resistant clay 8, and positioning block 9. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0019] The invention discloses an impact-proof composite wear-proof pipeline, comprising an inlet straight section 1, an elbow section 2 and an outlet straight section 3 which are connected in sequence. The inlet straight section 1 and the outlet straight section 3 both comprise an inner silicon carbide ceramic tube 4 and an outer first steel tube 5. The elbow section 2 comprises an inner impact-resistant metal layer 6 and an outer second steel tube 7. The impact-resistant metal layer 6 is made of high-chromium cast iron. The inlet straight section 1 and the outlet straight section 3 are not impacted. The silicon carbide ceramic tube 4, which is more stable and reduces the flow resistance of materials in the pipeline, is used. The first steel tube 5 and the second steel tube 7 protect the inner layer.

[0020] Furthermore, wear-resistant mortar 8 is filled between the silicon carbide ceramic tube 4 and the first steel tube 5 .

[0021] Furthermore, the annular gap between the silicon carbide ceramic tube 4 and the impact-resistant metal layer 6 is filled with wear-resistant cement 8 .

[0022] Furthermore, at least three positioning blocks 9 are equidistantly arranged along the annular direction between the end of the silicon carbide ceramic tube 4 and the first steel tube 5. The positioning blocks 9 ensure the coaxiality between the silicon carbide ceramic tube 4 and the first steel tube 5 to prevent axial displacement during use. When the length of the inlet straight section 1 and the outlet straight section 3 is greater than 500 mm, it is necessary to add additional positioning blocks 9 along the annular direction in the middle.

[0023] Furthermore, the inlet straight section 1, the elbow section 2 and the outlet straight section 3 adopt an eccentric structure with a thick outer arc side and a thin inner arc side along the elbow direction. Since the outer arc side has a large amount of wear, the service life can be extended.

[0024] The ceramic lining of the inlet and outlet straight sections reduces the flow resistance of the material in the pipeline, improves the conveying efficiency, and has high stability at high temperatures. The impact-resistant metal layer ensures the impact resistance of the elbow and extends the service life of the pipeline.

[0025] The above description is only a preferred feasible embodiment of the present utility model, and does not limit the scope of rights of the present utility model. All equivalent changes made using the contents of the present utility model specification and its drawings are included in the scope of rights of the present utility model.

Claims

1. An impact-proof composite anti-wear pipe, comprising an inlet straight section, an elbow section and an outlet straight section connected in sequence, characterized in that: The inlet straight section and the outlet straight section both include an inner silicon carbide ceramic tube and an outer first steel tube, and the elbow section includes an inner impact-resistant metal layer and an outer second steel tube.

2. The impact-resistant composite anti-wear pipe according to claim 1 is characterized in that: Wear-resistant clay is filled between the silicon carbide ceramic tube and the first steel tube.

3. The impact-resistant composite anti-wear pipe according to claim 1 is characterized in that: The annular gap between the silicon carbide ceramic tube and the impact-resistant metal layer is filled with wear-resistant cement.

4. The impact-resistant composite anti-wear pipe according to claim 1 is characterized in that: At least three positioning blocks are equidistantly arranged between the end of the silicon carbide ceramic tube and the first steel tube along the annular direction.

5. The impact-resistant composite wear-resistant pipe according to claim 1 is characterized in that: The inlet straight section, elbow section and outlet straight section adopt an eccentric structure with a thick outer arc side and a thin inner arc side along the elbow direction.

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