High-flexibility and fatigue-resistant stainless steel corrugated pipe

Abstract

The utility model discloses a stainless steel corrugated pipe with high flexibility and fatigue resistance, which comprises a corrugated pipe body, a first functional layer is arranged on the outer surface of the corrugated pipe body, the first functional layer comprises a modified polyurea elastomer coating and a fluorocarbon resin coating, a second functional layer is arranged on the inner surface of the corrugated pipe body, and the second functional layer comprises a modified polyurea elastomer coating and a fluorocarbon resin coating. The second functional layer comprises a polytetrafluoroethylene coating and a perfluoroalkoxy resin coating, and the right side of the corrugated pipe body communicates with a first connecting disc. The modified polyurea elastomer coating is arranged so that the corrugated pipe has high flexibility and fatigue resistance, the fluorocarbon resin coating is arranged so that the softness of the corrugated pipe body is further improved, the fatigue resistance effect is good, the polytetrafluoroethylene coating is arranged so that the corrugated pipe has high flexibility, fatigue resistance, wear resistance and corrosion resistance, and the service life of the corrugated pipe is prolonged. And by arranging the perfluoroalkoxy resin coating, the flexibility, the fatigue resistance, the wear resistance and the corrosion resistance of the corrugated pipe body are further improved.

Description

Technical Field

[0001] This utility model relates to the field of stainless steel corrugated pipe technology, specifically to a stainless steel corrugated pipe with high flexibility and fatigue resistance. Background Technology

[0002] In modern industrial and civil applications, stainless steel corrugated pipes are widely used in aerospace, petrochemical, automobile manufacturing, and building water supply and drainage industries due to their corrosion resistance, extensibility, and ability to absorb vibration and displacement.

[0003] Traditional stainless steel corrugated pipes exhibit significant drawbacks in practical applications: insufficient flexibility leads to excessively large bending radii, making them difficult to arrange flexibly in complex pipelines with limited space; frequent bending easily causes stress concentration at the crests and troughs; simultaneously, poor fatigue resistance means that under long-term alternating loads, high temperatures, or corrosive media, stress concentration areas such as crests and troughs are prone to microcracks that rapidly expand over time. This not only causes frequent cracking and leakage, significantly shortening the service life of the corrugated pipe, but may also lead to serious consequences such as media leakage and equipment failure, causing production interruptions, economic losses, and even threatening personal safety and environmental stability. Therefore, we propose a highly flexible and fatigue-resistant stainless steel corrugated pipe. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a highly flexible and fatigue-resistant stainless steel corrugated pipe with a long service life. This invention solves the significant defects of traditional stainless steel corrugated pipes in practical applications: insufficient flexibility leads to excessively large bending radii, making them difficult to arrange flexibly in complex pipelines with limited space; frequent bending easily causes stress concentration at the crests and troughs; simultaneously, poor fatigue resistance means that under long-term alternating loads, high temperatures, or corrosive media, stress concentration areas such as crests and troughs are prone to microcracks that rapidly expand over time. This not only leads to frequent cracking and leakage of the corrugated pipe, significantly shortening its service life, but may also cause serious consequences such as media leakage and equipment failure, resulting in production interruptions, economic losses, and even threats to personal safety and environmental stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a highly flexible and fatigue-resistant stainless steel corrugated pipe, comprising a corrugated pipe body, wherein a first functional layer is provided on the outer surface of the corrugated pipe body, the first functional layer comprising a modified polyurea elastomer coating and a fluorocarbon resin coating, and a second functional layer is provided on the inner surface of the corrugated pipe body, the second functional layer comprising a polytetrafluoroethylene coating and a perfluoroalkoxy resin coating.

[0006] Preferably, the right side of the corrugated pipe body is connected to a first connecting plate, a second connecting plate is provided on the right side of the first connecting plate, a connecting pipe is connected to the right side of the second connecting plate, a bolt is provided on the other side of the second connecting plate, the left side of the bolt passes through the second connecting plate and the first connecting plate in sequence and extends to the left side of the first connecting plate, a nut is threadedly connected to the left side of the bolt surface, springs are fixedly connected to the left side of the first connecting plate and the right side of the second connecting plate, a connecting frame is fixedly connected to one side of the spring, a limit frame is fixedly connected to one side of the connecting frame, and limit frames are inserted into the surfaces of the bolt and the nut.

[0007] Preferably, the modified polyurea elastomer coating is applied to the outer surface of the bellows body, and the fluorocarbon resin coating is applied to the outer surface of the modified polyurea elastomer coating.

[0008] Preferably, the polytetrafluoroethylene coating is applied to the inner surface of the corrugated pipe body, and the perfluoroalkoxy resin coating is applied to one side of the polytetrafluoroethylene coating.

[0009] Preferably, dampers are fixedly connected to the left side of the first connecting plate and the right side of the second connecting plate, and one side of the damper is fixedly connected to the connecting frame.

[0010] Preferably, a sealing ring is provided on the right side of the first connecting plate, and the right side of the sealing ring is in contact with the second connecting plate.

[0011] Compared with the prior art, this utility model provides a highly flexible and fatigue-resistant stainless steel corrugated pipe, which has the following beneficial effects:

[0012] 1. This utility model, by setting a modified polyurea elastomer coating, possesses high flexibility and fatigue resistance; by setting a fluorocarbon resin coating, the flexibility of the corrugated pipe body is further improved, and the fatigue resistance is good; by setting a polytetrafluoroethylene coating, it possesses high flexibility, fatigue resistance, wear resistance, and corrosion resistance; and by setting a perfluoroalkoxy resin coating, the flexibility, fatigue resistance, wear resistance, and corrosion resistance of the corrugated pipe body are further improved.

[0013] 2. When installing this utility model, move the connecting frame outward, and the connecting frame will drive the limiting frame to move, aligning the first connecting plate and the second connecting plate. Then, pass the bolt through the second connecting plate and the first connecting plate in sequence, and then connect the nut to the bolt. Then, loosen the connecting frame. At this time, the tension of the spring and the damper will drive the connecting frame to move, and the connecting frame will drive the limiting frame to move, thereby limiting the bolt and nut and preventing loosening. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial structural diagram of the present invention;

[0016] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0017] Figure 4 This is a schematic diagram of the first functional layer structure of this utility model;

[0018] Figure 5 This is a cross-sectional view of the first functional layer of this utility model;

[0019] Figure 6 This is a cross-sectional view of the second functional layer of this utility model.

[0020] In the figure: 1. Corrugated pipe body; 2. First connecting plate; 3. Second connecting plate; 4. Connecting pipe; 5. Bolt; 6. Nut; 7. Spring; 8. Connecting frame; 9. Damper; 10. Limiting frame; 11. First functional layer; 111. Modified polyurea elastomer coating; 112. Fluorocarbon resin coating; 12. Second functional layer; 121. Polytetrafluoroethylene coating; 122. Perfluoroalkoxy resin coating. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0023] Example 1:

[0024] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, this utility model provides a highly flexible and fatigue-resistant stainless steel corrugated pipe, including a corrugated pipe body 1. A first functional layer 11 is provided on the outer surface of the corrugated pipe body 1. The first functional layer 11 includes a modified polyurea elastomer coating 111 and a fluorocarbon resin coating 112. A second functional layer 12 is provided on the inner surface of the corrugated pipe body 1. The second functional layer 12 includes a polytetrafluoroethylene coating 121 and a perfluoroalkoxy resin coating 122. The modified polyurea elastomer coating 111 is applied to the outer surface of the corrugated pipe body 1, the fluorocarbon resin coating 112 is applied to the outer surface of the modified polyurea elastomer coating 111, the polytetrafluoroethylene coating 121 is applied to the inner surface of the corrugated pipe body 1, and the perfluoroalkoxy resin coating 122 is applied to one side of the polytetrafluoroethylene coating 121.

[0025] The specific effects of this technical solution are as follows: by setting the modified polyurea elastomer coating 111, it has high flexibility and fatigue resistance; by setting the fluorocarbon resin coating 112, the flexibility of the bellows body 1 is further improved, and the fatigue resistance is good; by setting the polytetrafluoroethylene coating 121, it has high flexibility, fatigue resistance, wear resistance and corrosion resistance; and by setting the perfluoroalkoxy resin coating 122, the flexibility, fatigue resistance, wear resistance and corrosion resistance of the bellows body 1 are further improved.

[0026] Example 2:

[0027] Based on Embodiment 1, this utility model is as follows: Figure 1 , Figure 2 and Figure 3 As shown, the right side of the corrugated pipe body 1 is connected to the first connecting plate 2. The right side of the first connecting plate 2 is provided with the second connecting plate 3. The right side of the second connecting plate 3 is connected to the connecting pipe 4. The other side of the second connecting plate 3 is provided with the bolt 5. The left side of the bolt 5 passes through the second connecting plate 3 and the first connecting plate 2 in sequence and extends to the left side of the first connecting plate 2. The left side of the bolt 5 is threaded with the nut 6. The left side of the first connecting plate 2 and the right side of the second connecting plate 3 are both fixedly connected with the spring 7. The side of the spring 7 is fixedly connected with the connecting bracket 8. The side of the connecting bracket 8 is fixedly connected with the limit bracket 10. The surfaces of the bolt 5 and the nut 6 are both inserted with the limit bracket 10. The left side of the first connecting plate 2 and the right side of the second connecting plate 3 are both fixedly connected with the damper 9. The side of the damper 9 is fixedly connected with the connecting bracket 8. The right side of the first connecting plate 2 is provided with the sealing ring, and the right side of the sealing ring is in contact with the second connecting plate 3.

[0028] The specific function of this technical solution is as follows: During installation, the connecting frame 8 is moved outward, and the connecting frame 8 drives the limiting frame 10 to move, aligning the first connecting plate 2 and the second connecting plate 3. Then, the bolt 5 is passed through the second connecting plate 3 and the first connecting plate 2 in sequence. Then, the nut 6 is connected to the bolt 5. Then, the connecting frame 8 is loosened. At this time, the tension of the spring 7 and the damper 9 drives the connecting frame 8 to move, and the connecting frame 8 drives the limiting frame 10 to move, thereby limiting the bolt 5 and the nut 6 and preventing loosening.

[0029] Working principle: By setting the modified polyurea elastomer coating 111, it has high flexibility and fatigue resistance. By setting the fluorocarbon resin coating 112, the flexibility of the bellows body 1 is further improved and the fatigue resistance is good. By setting the polytetrafluoroethylene coating 121, it has high flexibility, fatigue resistance, wear resistance and corrosion resistance. By setting the perfluoroalkoxy resin coating 122, the flexibility, fatigue resistance, wear resistance and corrosion resistance of the bellows body 1 are further improved.

[0030] During installation, the connecting frame 8 is moved outward, which in turn moves the limiting frame 10 to align the first connecting plate 2 and the second connecting plate 3. Then, the bolt 5 is passed through the second connecting plate 3 and the first connecting plate 2 in sequence. The nut 6 is then connected to the bolt 5. The connecting frame 8 is then released. At this time, the tension of the spring 7 and the damper 9 drives the connecting frame 8 to move, which in turn drives the limiting frame 10 to move, thereby limiting the bolt 5 and the nut 6 to prevent loosening.

[0031] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0032] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. 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 solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A highly flexible and fatigue-resistant stainless steel corrugated pipe, comprising a corrugated pipe body (1), characterized in that: The outer surface of the corrugated pipe body (1) is provided with a first functional layer (11), which includes a modified polyurea elastomer coating (111) and a fluorocarbon resin coating (112). The inner surface of the corrugated pipe body (1) is provided with a second functional layer (12), which includes a polytetrafluoroethylene coating (121) and a perfluoroalkoxy resin coating (122).

2. The highly flexible and fatigue-resistant stainless steel corrugated pipe according to claim 1, characterized in that: The right side of the corrugated pipe body (1) is connected to the first connecting plate (2). The right side of the first connecting plate (2) is provided with a second connecting plate (3). The right side of the second connecting plate (3) is connected to a connecting pipe (4). The other side of the second connecting plate (3) is provided with a bolt (5). The left side of the bolt (5) passes through the second connecting plate (3) and the first connecting plate (2) in sequence and extends to the left side of the first connecting plate (2). The left side of the surface of the bolt (5) is threaded with a nut (6). The left side of the first connecting plate (2) and the right side of the second connecting plate (3) are both fixedly connected with springs (7). One side of the spring (7) is fixedly connected with a connecting frame (8). One side of the connecting frame (8) is fixedly connected with a limit frame (10). The surfaces of the bolt (5) and the nut (6) are both inserted with limit frames (10).

3. The highly flexible and fatigue-resistant stainless steel corrugated pipe according to claim 1, characterized in that: The modified polyurea elastomer coating (111) is applied to the outer surface of the bellows body (1), and the fluorocarbon resin coating (112) is applied to the outer surface of the modified polyurea elastomer coating (111).

4. The highly flexible and fatigue-resistant stainless steel corrugated pipe according to claim 1, characterized in that: The polytetrafluoroethylene coating (121) is applied to the inner surface of the corrugated pipe body (1), and the perfluoroalkoxy resin coating (122) is applied to one side of the polytetrafluoroethylene coating (121).

5. A highly flexible and fatigue-resistant stainless steel corrugated pipe according to claim 2, characterized in that: A damper (9) is fixedly connected to the left side of the first connecting plate (2) and the right side of the second connecting plate (3), and one side of the damper (9) is fixedly connected to the connecting frame (8).

6. The highly flexible and fatigue-resistant stainless steel corrugated pipe according to claim 2, characterized in that: A sealing ring is provided on the right side of the first connecting plate (2), and the right side of the sealing ring is in contact with the second connecting plate (3).

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