A wear-resistant elbow
By setting a backpack on the outside of the elbow body and filling it with wear-resistant material, the problem of elbow wear and leakage was solved, which improved wear resistance and production safety, and reduced costs and installation complexity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DATANG HANCHENG NO 2 POWER GENERATION
- Filing Date
- 2025-07-21
- Publication Date
- 2026-06-30
AI Technical Summary
In existing technologies, elbows are prone to wear and leakage during flue gas transportation. Existing material improvements have problems with poor weldability and weak weld repairs, which affect production safety and the environment.
A backpack is installed on the outside of the elbow body and filled with wear-resistant material, such as concrete, to form a closed containment space to enhance wear resistance. The backpack is welded to the elbow body, and the wear-resistant material blocks the flow of media when it wears down.
It effectively reduces the risk of pipeline leakage, improves production safety and efficiency, reduces costs, facilitates on-site processing and installation, reduces weight, and facilitates transportation and installation.
Smart Images
Figure CN224433804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline technology, and in particular to a wear-resistant elbow. Background Technology
[0002] During operation, thermal power plants generate a large amount of flue gas. During the flue gas dust removal process, a significant amount of fly ash is collected. This fly ash is collected in ash hoppers and then transported to designated locations using an ash conveying system. The ash conveying system includes pipelines of various shapes. When the pipeline needs to change direction, elbows are required for connection. When the medium changes direction, it causes erosion and wear on the inner wall of the elbow, especially the outer curved wall. Prolonged erosion and wear can lead to thinning of the elbow wall, and even perforation and cracking. Elbows with such problems must be repaired or replaced promptly to ensure normal production. Replacement or repair is cumbersome and time-consuming, affecting production progress, and dust leakage can also cause environmental pollution, impacting the operating environment.
[0003] In existing technologies, to make elbows more wear-resistant, the common approach is to improve the material, using a more wear-resistant material and thicker pipe walls. However, using new materials has limitations; the greater the hardness of the material, the worse its weldability, and the more brittle the material becomes. Once worn, it is difficult to repair by welding, or the repaired connection is not very strong. Existing technologies also include ceramic lining solutions. Although this thickens the pipe wall, once wear occurs, heat melting and delamination can occur during repair welding, leading to the ceramic lining falling off. Utility Model Content
[0004] In view of this, in order to solve at least one of the above-mentioned technical problems, this utility model provides a wear-resistant elbow.
[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:
[0006] This utility model embodiment provides a wear-resistant elbow, including:
[0007] Elbow body, the medium flowing inside the elbow body;
[0008] The backpack is connected to the elbow body and covers at least a portion of the outer arc surface of the elbow body. An accommodating space is formed between the backpack and the elbow body, and the accommodating space is filled with abrasion-resistant material.
[0009] The backpack is made of steel, and the abrasion-resistant materials include concrete.
[0010] The backpack is connected to the curved body by the edge, and the storage space is an enclosed space.
[0011] The backpack includes two side facades, two end facades, and a cover.
[0012] Two side facades are arranged parallel to each other in the circumferential direction of the elbow body, and two end facades are respectively connected to the two ends of the side facades in the length direction of the elbow body. The end facades are respectively connected to the two side facades.
[0013] The cover is connected to the side facade and end facade on the side away from the main body of the elbow.
[0014] The curvature of the cover along the length of the elbow body is consistent with the curvature of the elbow body corresponding to the cover, so that the distance between the cover and the elbow body is uniform along the length of the elbow body.
[0015] The cover extends straight or curved in the circumferential direction of the elbow body.
[0016] The backpack covers an area of not less than one-quarter and not more than one-half of the circumference of the bend body.
[0017] The backpack and the two ends of the curved head body are at a preset distance along their length.
[0018] The backpack is welded to the main body of the elbow.
[0019] The backpack must have a minimum thickness of 5cm and 10cm.
[0020] Beneficial effects:
[0021] This utility model proposes a wear-resistant elbow by incorporating a backpack filled with wear-resistant material on the outside of the elbow body. When the elbow body is damaged and cracked by the impact of the medium, the wear-resistant material prevents leakage and instead further impacts the wear-resistant material, thereby reducing the risk of pipeline leakage and improving production safety and efficiency. This application can be further processed from existing elbow pipelines, resulting in low cost and on-site processing without the need for reinstallation or adjustments to pipeline positions. Furthermore, the targeted addition of the backpack, rather than thickening the entire pipe, significantly reduces the weight of the elbow, facilitating transportation and installation, and minimizing environmental requirements for installation. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of a wear-resistant elbow from a first-view perspective, provided as an embodiment of the present invention.
[0023] Figure 2 This is a structural schematic diagram of a wear-resistant elbow provided in an embodiment of the present invention from a second-view perspective. Detailed Implementation
[0024] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the following detailed description of the specific implementation method, structure, features and effects of the wear-resistant elbow proposed according to this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0025] like Figure 1-2 As shown, this utility model embodiment provides a wear-resistant elbow, comprising:
[0026] Elbow body 100, the elbow body 100 is used for the flow medium;
[0027] Backpack 200 is connected to elbow body 100 and covers at least a portion of the outer arc surface of elbow body 100. An accommodating space is formed between backpack 200 and elbow body 100, and the accommodating space is filled with abrasion-resistant material 300.
[0028] The elbow body 100 is a pipe with a certain bending angle, such as... Figure 1-2 The 90-degree bend shown can also be a 30-degree bend or other angles. The length direction of the bend body 100 refers to the direction of medium flow within the bend body 100. The sidewalls of the bend body 100 bend along its length. The bend body 100 includes an inner arc surface and an outer arc surface located outside the inner arc surface. In other words, both ends of the bend body 100 bend in a predetermined direction, with the outer arc surface located on the opposite side of the predetermined direction and the inner arc surface located on one side of the predetermined direction. When the medium flows within the bend body 100, it impacts the outer arc surface, and the flow direction is changed through the guiding effect of the outer arc surface.
[0029] The backpack 200 is located on the outside of the elbow body 100, at the outer arc surface, and protrudes from the outer arc surface, forming a backpack-like attachment layer on the outer arc surface. The backpack 200 protrudes from the outer arc surface, thus forming an accommodating space with the outer arc surface, which is filled with abrasion-resistant material 300. When the outer arc surface wears and leaks, part of the structure is missing, forming a damaged area. Subsequently, the abrasion-resistant material 300 will be exposed on the inner wall of the elbow body 100. The fluid medium will impact the abrasion-resistant material 300, which will act as a guide, preventing leakage in the wear-resistant elbow. Furthermore, even when the abrasion-resistant material 300 wears through over time, the backpack 200 can still act as a barrier, forming a double leak-proof system.
[0030] The elbow body 100 can be an additionally designed and manufactured elbow body 100, or it can be an existing standard elbow part, eliminating the need for elbow design and manufacturing, thus greatly reducing costs and complexity. In some scenarios, the elbow body 100 can also be a serviced part already in operation, that is, a part already connected to the ash conveying system. In this case, the elbow body 100 does not need to be disassembled, but the backpack 200 can be connected on-site and the wear-resistant material 300 can be filled. This allows for wear-resistant treatment of existing elbows for some extreme and special scenarios.
[0031] The structure and coverage area of the backpack 200 can be varied, depending on the shape of the elbow body 100 and the properties or flow rate of the medium. More specific implementation methods will be described below.
[0032] The wear-resistant elbow proposed in this embodiment features a backpack filled with wear-resistant material on the outside of the elbow body. When the elbow body is damaged and cracked by the impact of the medium, the wear-resistant material prevents leakage and instead further impacts the wear-resistant material, thereby reducing the risk of pipeline leakage and improving production safety and efficiency. This application can be further processed from existing elbow pipelines, resulting in low cost and on-site processing without the need for reinstallation or adjustments to pipeline positions. Furthermore, the targeted addition of the backpack, rather than thickening the entire pipe, significantly reduces the weight of the elbow, facilitating transportation and installation, and minimizing environmental requirements for installation.
[0033] The materials for Backpack 200 and Abrasion Resistance 300 can be varied. Backpack 200 can be made of steel, such as welded steel plates to form the backpack. Abrasion Resistance 300 can be made of concrete, which is used as a filler in a liquid state and forms a wear-resistant layer after curing. Graphene can also be used, as it has good hardness and is not easily corroded. In environments containing oil and corrosive substances, composite rubber can be used, exhibiting superior abrasion resistance in oily environments.
[0034] In one embodiment, the backpack 200 is connected to the elbow body 100 by means of an edge, such as by welding the edge to the elbow body 100. This minimizes the weight of the backpack 200, increases the capacity of the storage space, and covers a larger area of the elbow body 100. Furthermore, welding provides a strong connection and prevents the connection from easily detaching when heated.
[0035] The containment space is a closed space, which encloses the wear-resistant material 300 and prevents the complex external environment from affecting the properties of the wear-resistant material 300, such as preventing long-term exposure that could lead to aging of the wear-resistant material.
[0036] The backpack 200 can have various shapes. In one embodiment, the backpack 200 includes two side facades 210, two end facades 220, and a cover 230. The two side facades 210 are arranged parallel to each other at intervals in the circumferential direction of the elbow body 100. The two end facades 220 are respectively connected to the two ends of the side facades 210 in the length direction of the elbow body 100, and the end facades 220 are respectively connected to the two side facades 210. The cover 230 is connected to the side of the side facades 210 and the end facades 220 away from the elbow body 100.
[0037] The side facade 210 is a flat plate structure, comprising two parallel curved edges and two straight edges. The curvature of the curved edges matches the curvature of the elbow body 100 along its length. The side facade 210 is parallel to the length direction of the elbow body 100. The inner curved edges are welded to the elbow body 100, while the outer curved edges protrude beyond the outer arc surface of the elbow body 100. The end facade 220 is a flat plate structure, comprising three consecutive straight edges and a single curved edge. The curvature of the curved edges matches the circumferential curvature of the elbow body 100, and the end facade 220 is perpendicular to the length direction of the elbow body 100. The curved edges are welded to the elbow body 100, while the outer straight edges protrude beyond the outer arc surface of the elbow body 100. After the side facade 210 and end facade 220 are welded, the side facade 210, end facade 220, and the outer arc surface of the elbow body 100 will form a long arc-shaped groove. Wear-resistant material 300 is filled into the arc-shaped groove until it is full. Then, the cover 230 can be connected to the side facade 210 and end facade 220.
[0038] Specifically, the cover 230 is a curved plate-like structure. The curvature of the cover 230 along the length of the elbow body 100 is consistent with the curvature of the corresponding elbow body 100, so that the distance between the cover 230 and the elbow body 100 is uniform along the length of the elbow body 100. In this way, a uniform wear-resistant layer can be formed along the length of the elbow body 100. The cover 230 is welded to the outer arc edge of the side facade 210 and the outer straight edge of the end facade 220, and then the wear-resistant material 300 is sealed inside. At this point, the backpack 200 is completed.
[0039] The extension of the cover 230 in the circumferential direction of the elbow body 100 can take many forms, such as... Figure 1 As shown, the cover surface 230 extends straight in the circumferential direction of the elbow body 100, which facilitates processing and welding. Alternatively, the cover surface 230 can also extend in a curved manner in the circumferential direction of the elbow body 100, such that the curvature in the circumferential direction of the elbow body 100 is consistent with the curvature of the elbow body 100, thereby forming a uniform wear-resistant layer in the circumferential direction of the elbow body 100.
[0040] In one embodiment, the backpack 200 covers an area of at least one-quarter of the circumference of the elbow body 100 to prevent leakage due to insufficient coverage or detachment of the backpack 200 due to wear at the welding points. The backpack 200 also covers no more than half of the circumference of the elbow body 100 to avoid excessive weight of the wear-resistant elbow due to structural redundancy.
[0041] The height of backpack 200 and the thickness of its side walls can be set as needed. For example... Figure 1 As shown, the minimum thickness H of the backpack 200, i.e., the minimum distance between the cover 230 and the elbow body 100, is greater than or equal to 5cm and less than or equal to 10cm, thereby ensuring sufficient thickness of the abrasion-resistant material 300 without causing excessive weight. The side wall thickness of the backpack 200, i.e., the thickness of the side facade 210, end facade 220, and cover 230, can be greater than or equal to 3mm and less than or equal to 5mm, such as 4mm, to ensure sufficient strength without causing excessive weight.
[0042] In one implementation, such as Figure 2 As shown, the backpack 200 and the elbow body 100 have a preset distance L at both ends along their length. The preset distance L can be greater than or equal to 5cm and less than or equal to 10cm, thereby ensuring that the elbow body 100 has machining allowance on both sides, which can be used for welding or machining threads to connect with other pipes.
[0043] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A wear-resistant elbow, characterized in that, include: Elbow body (100), wherein the elbow body (100) is used for the flow of medium; A backpack (200) is connected to the elbow body (100) and covers at least a portion of the outer arc surface of the elbow body (100). An accommodating space is formed between the backpack (200) and the elbow body (100) and is filled with abrasion-resistant material (300).
2. The wear-resistant elbow according to claim 1, characterized in that, The backpack (200) is made of steel; The material of the wear-resistant material (300) includes concrete.
3. The wear-resistant elbow according to claim 1, characterized in that, The backpack (200) is connected to the elbow body (100) by its edge, and the accommodating space is an enclosed space.
4. The wear-resistant elbow according to claim 1, characterized in that, The backpack (200) includes two side facades (210), two end facades (220), and a cover (230); The two side facades (210) are arranged parallel to each other in the circumferential direction of the elbow body (100), and the two end facades (220) are respectively connected to the two ends of the side facades (210) in the length direction of the elbow body (100). The end facades (220) are respectively connected to the two side facades (210). The cover (230) is connected to the side facade (210) and the end facade (220) on the side away from the elbow body (100).
5. The wear-resistant elbow according to claim 4, characterized in that, The curvature of the cover (230) along the length of the elbow body (100) is consistent with the curvature of the elbow body (100) corresponding to the cover (230), so that the distance between the cover (230) and the elbow body (100) is uniform along the length of the elbow body (100).
6. The wear-resistant elbow according to claim 4, characterized in that, The cover (230) extends straight or curved in the circumferential direction of the elbow body (100).
7. The wear-resistant elbow according to claim 1, characterized in that, The backpack (200) covers an area of not less than one-quarter of the circumference of the elbow body (100) and not more than one-half of the circumference of the elbow body (100).
8. The wear-resistant elbow according to claim 1, characterized in that, The backpack (200) and the two ends of the elbow body (100) along the length direction are at a predetermined distance.
9. The wear-resistant elbow according to claim 1, characterized in that, The backpack (200) is welded to the elbow body (100).
10. The wear-resistant elbow according to claim 1, characterized in that, The minimum thickness of the backpack (200) is greater than or equal to 5cm and less than or equal to 10cm.