Ribbed liner with built-in flow guide ribs

Abstract

The utility model provides a kind of eccentric wall thickness super wear-resistant composite pipe with built-in flow guide rib, the cross-sectional shape of lining wear-resistant layer is eccentric circular ring structure with eccentric hole, the eccentric hole of lining wear-resistant layer makes the thin-walled sidewall thickness gradually increase from the thick-walled sidewall thickness towards the inside of pipe, and there are multiple flow guide ribs for guiding internal solid particles to the center area of pipe body on the inner circumferential wall of lining wear-resistant layer, which are distributed in a circular manner.The utility model increases the wall thickness of the side pipe body where wear is serious according to the distribution characteristics of solid particles in the pipe body during transportation, achieves the key defense effect of the side where wear is serious, can actively intervene in the flow field in the pipe, balances the solid particle concentration of the whole cross section by increasing the flow speed of the thin-walled side, effectively disturbs the particle deposition bed easily formed at the bottom of the thick-walled side, destroys its stable structure, achieves the purpose of guiding internal solid particles to the center area of pipe body, balances the particle concentration distribution on the whole cross section, weakens the causes of flow field leading to eccentric wear, and improves the service life and material utilization.

Description

Technical Field

[0001] This utility model belongs to the field of composite pipe technology, specifically relating to an ultra-wear-resistant composite pipe with a thicker wall and built-in flow guide ribs. Background Technology

[0002] With the development of the mining industry, the reliance on pipelines for transporting highly abrasive media such as slurry and sand-laden wastewater is increasing, leading to the widespread use of wear-resistant pipes such as flexible wear-resistant pipes and steel-lined plastic pipes. These pipes all employ a uniform inner wall thickness wear-resistant layer design, which, while possessing good versatility and meeting the needs of most operating conditions, has significant limitations in actual operation: due to gravity, solid particles in straight pipes tend to concentrate in the lower half of the flow, resulting in significantly higher wear in the lower half than in the upper half; at bends or elbows, the medium's inertia causes solid particles to deflect towards the outer side of the inner wall, causing severe uneven wear in that area. This uniform wall thickness design results in redundant wear-resistant material in the non-wear areas, while the heavily worn areas become the shortest-lived section, leading to material waste and limiting the overall service life of the pipeline. Therefore, improvements are necessary to address these issues. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an ultra-wear-resistant composite pipe with a thicker wall and built-in flow guide ribs. Based on the distribution characteristics of solid particles in the pipe body during transportation, the pipe structure is optimized to increase the thickness of the outer side of the pipe body where wear is severe. This results in a gradual increase in wall thickness from the thin-walled side facing inwards to the thick-walled side facing outwards, increasing the wall thickness on the severely worn side and achieving a focused defense effect on the severely worn side. This significantly improves material utilization and pipe service life. At the same time, multiple flow guide ribs are circumferentially distributed on the inner circumferential wall of the wear-resistant lining layer, which can actively intervene in the flow field inside the pipe. By increasing the flow velocity on the thin-walled side, the solid particle concentration of the entire cross-section is balanced, and the particle deposition bed that is easily formed at the bottom of the thick-walled side is effectively disturbed, disrupting its stable structure. This achieves the purpose of guiding the internal solid particles to the central area of ​​the pipe body, balancing the particle concentration distribution across the entire cross-section, fundamentally weakening the flow field causes of uneven wear, solving the problem of short pipe service life caused by uneven wear, and greatly improving pipe service life and material utilization.

[0004] The technical solution adopted in this utility model is: an ultra-wear-resistant composite pipe with an eccentric wall thickness and built-in flow guide ribs, comprising a pipe body with an inner wear-resistant lining layer, a reinforcing layer and an outer protective layer arranged sequentially from the inside to the outside. The cross-sectional shape of the inner wear-resistant lining layer is an eccentric ring structure with an eccentric inner hole. The eccentric inner hole of the inner wear-resistant lining layer causes the wall thickness of the thin-walled side facing the inside of the pipe to gradually increase to the wall thickness of the thick-walled side facing the outside of the pipe. Multiple flow guide ribs are circumferentially distributed on the inner circumferential wall of the inner wear-resistant lining layer to guide the internal solid particles to the central area of ​​the pipe body.

[0005] The multiple guide ribs are arranged in a non-uniform distribution on the inner circumferential wall of the wear-resistant lining layer, with the spacing between two adjacent guide ribs gradually increasing from the thin-wall side to the corresponding thick-wall side.

[0006] Furthermore, the height of the guide rib on the thin-walled side is greater than the height of the guide rib on the thick-walled side.

[0007] Furthermore, the guide ribs on the inner wall of the wear-resistant lining at the straight pipe position transition to the inner wall of the wear-resistant lining at the bend position.

[0008] Furthermore, the guide rib is a spiral rib with a wear-resistant material wrapped around a hard rib or a straight rib parallel to the axis.

[0009] Advantages of this utility model compared to the prior art: 1. Based on the distribution characteristics of solid particles in the pipe body during transportation, this technical solution optimizes the pipe structure and increases the thickness of the outer side of the pipe body that is severely worn. This results in a gradual increase in the wall thickness from the thin-walled side facing the inside of the pipe to the thick-walled side facing the outside of the pipe, thereby increasing the wall thickness of the pipe body on the severely worn side. This achieves a key defense effect on the severely worn side, significantly improving material utilization and pipeline service life. 2. This technical solution utilizes multiple flow-guiding ribs distributed circumferentially on the inner circumferential wall of the wear-resistant inner lining layer. This allows for active intervention in the flow field within the pipe, increasing the flow velocity on the thin-walled side to balance the solid particle concentration across the entire cross-section. It also effectively disturbs the particle deposition bed that is easily formed at the bottom of the thick-walled side, disrupting its stable structure. This achieves the purpose of guiding internal solid particles towards the central region of the pipe, balancing the particle concentration distribution across the entire cross-section, fundamentally weakening the flow field causes that lead to uneven wear, solving the problem of short pipe lifespan due to uneven wear, and greatly improving the pipe lifespan and material utilization rate. 3. The design of the guide ribs in this technical solution not only delays pipe wear, but also weakens the mechanism that leads to uneven wear from the root of fluid mechanics, realizing a fundamental shift from passively bearing the wear to actively mitigating it. 4. The non-uniform flow guide ribs and the off-thickness structure in this technical solution constitute a collaborative defense system. The flow guide ribs reduce the wear load in the off-thickness area by optimizing the flow field, while the off-thickness structure provides solid material protection for the local impact that the flow guide ribs may cause. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0011] The following will be based on the embodiments of this utility model. Figure 1The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0012] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0014] The ultra-wear-resistant composite pipe with a thicker wall and built-in flow guide ribs, such as Figure 1As shown, the pipe body 2 includes, from the inside out, an inner wear-resistant lining layer 2-1, a reinforcing layer 2-2, and an outer protective layer 2-3. The cross-sectional shape of the inner wear-resistant lining layer 2-1 is an eccentric annular structure with an eccentric inner hole. The eccentric inner hole of the inner wear-resistant lining layer 2-1 causes the wall thickness of the thin-walled side 2-11 facing the inside of the pipe to gradually increase to the wall thickness of the thick-walled side 2-12 facing the outside of the pipe. The specific eccentric dimension can be determined according to the wear thickness of the working medium. Multiple guide ribs 1 are circumferentially distributed on the inner circumferential wall of the inner wear-resistant lining layer 2-1 to guide the internal solid particles towards the central area of ​​the pipe body 2. In the above structure, based on the distribution characteristics of solid particles in the pipe body 2 during transportation, the structure of the pipe body 2 is optimized to increase the thickness of the outer side of the pipe body 2 where wear is severe, causing the wall thickness of the thin-walled side 2-11 facing the inside of the pipe to gradually increase to the wall thickness of the thick-walled side 2-12 facing the outside of the pipe, thus increasing the thickness of the severely worn side of the pipe body 2. The thick wall of pipe body 2 provides key protection for the severely worn side, significantly improving material utilization and pipe lifespan. Multiple flow-guiding ribs 1 are circumferentially distributed on the inner circumferential wall of the wear-resistant lining 2-1, actively intervening in the internal flow field. By increasing the flow velocity on the thin-walled side 2-11, the concentration of solid particles across the entire cross-section is balanced, and the particle deposition bed easily formed at the bottom of the thick-walled side 2-12 is effectively disturbed, disrupting its stable structure. This achieves the purpose of guiding internal solid particles towards the central region of pipe body 2, balancing the particle concentration distribution across the entire cross-section, fundamentally weakening the flow field causes of uneven wear, and solving the problem of short pipe body 2 lifespan due to uneven wear. This greatly improves the lifespan of pipe body 2 and material utilization. The flow-guiding ribs 1 not only delay pipe body 2 wear but also weaken the mechanism causing uneven wear from a fluid mechanics perspective, achieving a fundamental shift from passively bearing wear to actively mitigating it. The distribution structure of the flow guide ribs 1 is as follows: multiple flow guide ribs 1 are arranged in a non-uniform distribution on the inner circumferential wall of the inner lining wear-resistant layer 2-1, with the spacing between two adjacent flow guide ribs 1 gradually increasing from one side of the thin-walled side 2-11 to the corresponding side of the thick-walled side 2-12. Specifically, the height of the flow guide rib 1 on the thin-walled side 2-11 is greater than the height of the flow guide rib 1 on the thick-walled side 2-12, and the specific height difference range can be adjusted according to the type of medium.

[0015] Wherein, the guide ribs 1 on the inner wall of the wear-resistant lining layer 2-1 at the straight pipe position of the pipe body 2 transition to the inner wall of the wear-resistant lining layer 2-1 at the bend position in an irregular arrangement; wherein the irregular arrangement is determined by the angle of transition between the straight pipe and the bend and the size of the pipe body 2, and the specific distribution method is not limited.

[0016] The non-uniform flow guide rib 1 and the off-thickness structure form a collaborative defense system. The flow guide rib reduces the wear load in the off-thickness region by optimizing the flow field, while the off-thickness structure provides solid material protection for the local impact that the flow guide rib 1 may cause.

[0017] Specifically, the flow guide rib 1 is a spiral rib or a straight rib parallel to the axis, with the outer layer of a wear-resistant material wrapped with a hard rib (such as metal materials: wear-resistant steel, manganese steel, chromium steel, etc.; engineering plastic materials: ultra-high molecular weight polyethylene, nylon, polytetrafluoroethylene, polyoxymethylene, polyketone, etc.; composite materials: ceramic-metal composite, etc.). The flow guide rib 1 (especially the spiral rib) can continuously agitate and lift the medium, effectively preventing the deposition and adhesion of solid particles. This characteristic significantly reduces the risk of blockage in the pipe body 2 when conveying high-concentration, easily settling media, ensuring the continuous and stable operation of the conveying system and reducing maintenance downtime and costs.

[0018] The inner wear-resistant lining layer 2-1 primarily serves the function of media transmission and can be made of various materials, such as PE, UHMWPE, PP, TPU, etc., depending on actual needs. It can also be co-extruded with multiple materials, such as PE+POE, PE+TPU, etc. The wear-resistant material wrapped around the flow guide rib 1 is the same as that of the inner wear-resistant lining layer 2-1. The reinforcing layer 2-2 mainly serves the function of bearing pressure, and specific materials can be polyester fiber, aramid fiber, steel cord, glass fiber, carbon fiber, basalt fiber, stainless steel wire, and their pre-impregnated strips, etc. The outer protective layer 2-3 mainly serves the function of protecting the pipeline, and specific materials can be polyethylene. The multi-layer structure works together to meet the pipeline's wear resistance and pressure bearing requirements.

[0019] This design achieves a balance between passive reinforcement and active guidance. The thicker wall structure ensures sufficient material reserves in high-wear-risk areas to cope with impact and wear; while the non-uniform guide ribs actively intervene in the flow field, optimize velocity distribution, suppress particle settling, and significantly reduce the overall wear rate. These two elements complement each other, not only further extending the pipeline's service life beyond that of a simple thicker wall pipe, but also endowing it with excellent anti-clogging performance, making it particularly suitable for conveying high-concentration, easily settling, and highly viscous slurries or slag.

[0020] This technical solution achieves significant long-term benefits with minor structural improvements. The significantly extended lifespan of the pipe body directly reduces material consumption and replacement costs per unit time. Its anti-clogging characteristics ensure production efficiency and reduce maintenance costs. The optimized flow field also helps reduce system operating resistance and pumping energy consumption, demonstrating excellent comprehensive economic and environmental performance throughout its entire life cycle.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A composite pipe with an eccentric wall thickness and built-in flow guiding ribs, characterized in that: The tube (2) includes an inner wear-resistant lining layer (2-1), a reinforcing layer (2-2), and an outer protective layer (2-3) arranged sequentially from the inside to the outside. The cross-sectional shape of the inner wear-resistant lining layer (2-1) is an eccentric ring structure with an eccentric inner hole. The eccentric inner hole of the inner wear-resistant lining layer (2-1) causes the wall thickness of the thin-walled side (2-11) facing the inside of the tube to gradually increase to the wall thickness of the thick-walled side (2-12) facing the outside of the tube. Multiple flow-guiding ribs (1) are circumferentially distributed on the inner circumferential wall of the inner wear-resistant lining layer (2-1) to guide the internal solid particles to the central area of ​​the tube (2).

2. The ultra-wear-resistant composite pipe with an eccentric wall thickness and built-in flow-guiding ribs according to claim 1, characterized in that: The multiple flow guide ribs (1) are arranged in a non-uniform distribution on the inner circumferential wall of the inner lining wear-resistant layer (2-1), with the spacing between two adjacent flow guide ribs (1) gradually increasing from the thin-wall side (2-11) to the corresponding side of the thick-wall side (2-12).

3. The ultra-wear-resistant composite pipe with an eccentric wall thickness and built-in flow-guiding ribs according to claim 2, characterized in that: The height of the guide rib (1) on the thin-walled side (2-11) is greater than the height of the guide rib (1) on the thick-walled side (2-12).

4. The ultra-wear-resistant composite pipe with an eccentric wall thickness and built-in flow-guiding ribs according to claim 1, characterized in that: The guide ribs (1) on the inner wall of the wear-resistant layer (2-1) in the straight pipe position of the pipe body (2) transition to the inner wall of the wear-resistant layer (2-1) in the bend position.

5. The ultra-wear-resistant composite pipe with an eccentric wall thickness and built-in flow guide ribs according to claim 1, characterized in that: The guide rib (1) is a spiral rib with wear-resistant material wrapped around a hard rib or a straight rib parallel to the axis.

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