A loading device for testing the fatigue performance of a deep-sea flexible pipe

Abstract

The utility model discloses a kind of deep-sea flexible pipeline fatigue performance test loading device, it is related to pipeline fatigue test technical field, including pipe body, the side of pipe body is provided with machine shell, the outer surface of machine shell is fixedly connected with rack for storing things;Reciprocating knock component, for reciprocating horizontal movement knock on the outer surface of pipe body;Rotary component, for controlling pipe body to rotate, the sustained rotation of the device control pipe body, ensure that knocking load can be evenly distributed in the circumferential region of the whole outer surface of pipe body, so that more comprehensive, truly simulate the actual working condition that pipe body bears random load from different directions in complex marine environment, the synergistic effect of rotation and knocking realizes the dead angle-free detection to the full surface fatigue performance of pipe body, not only can evaluate the durability of weld or specific site, more can reveal that the global fatigue weak link possibly caused by material anisotropy or manufacturing process defect, greatly improve the integrity and reliability of test evaluation.

Description

Technical Field

[0001] This utility model relates to the field of pipeline fatigue testing technology, specifically to a loading device for testing the fatigue performance of deep-sea flexible pipelines. Background Technology

[0002] Deep-sea flexible pipelines are the lifeline connecting floating production facilities on the sea surface with subsea wellheads and pipelines. They are subjected to internal pressure, axial force, and cyclic bending loads caused by waves and ocean currents in the complex marine environment. Fatigue failure is the most common failure mode. Therefore, before being put into use, full-scale fatigue testing must be conducted to verify their design life. Current loading devices for testing the fatigue performance of flexible pipes have the following problems: The outdated method of relying on workers to repeatedly tap pipes with handheld testing tools is problematic. First, the subjectivity and instability of manual tapping make it difficult to maintain consistency in the applied force, frequency, and location, resulting in significant deviations in test data and seriously affecting the accuracy and reliability of fatigue life assessment. Second, it relies on the physical strength and concentration of operators, and prolonged repetitive labor can easily lead to musculoskeletal diseases and fatigue errors, causing substantial damage to personnel health and creating hidden dangers for safety accidents due to operational errors. Therefore, in view of this, this utility model proposes a loading device for testing the fatigue performance of deep-sea flexible pipelines to make up for and improve the deficiencies of the prior art. Utility Model Content

[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a loading device for testing the fatigue performance of deep-sea flexible pipelines, including a pipe body, a housing on one side of the pipe body, and a shelf fixedly connected to the outer surface of the housing; A reciprocating striking assembly is disposed between the housing and the shelf, and is used to reciprocate horizontally to strike the outer surface of the tube. A rotating assembly is located between the tube body and the shelf, and the rotating assembly is used to control the rotation of the tube body; Among them, the reciprocating striking component and the rotating component are linked by a driving component, so that the tube body rotates while reciprocatingly striking the outer surface of the tube body.

[0004] Preferably, the reciprocating striking assembly includes a rotating shaft rotatably connected inside the shelf, a rotating disk fixedly connected to the outer surface of the rotating shaft, and a shifting column fixedly connected to the outer surface of the rotating disk.

[0005] Preferably, the reciprocating striking assembly also includes a rotating column rotatably connected to the outer surface of the shelf, a swing rod fixedly connected to the outer surface of the rotating column, and a sector gear fixedly connected to the bottom end of the swing rod.

[0006] Preferably, the reciprocating striking assembly also includes a toothed column slidably connected to the outer surface of the shelf, and the toothed column meshes with a sector gear, with a striking block fixedly connected to one end of the toothed column near the tube body.

[0007] Preferably, the rotating assembly includes a rotating shaft rotatably connected inside the shelf, with a main turntable fixedly connected to the end of the rotating shaft away from the shelf.

[0008] Preferably, the rotating assembly also includes a drive shaft rotatably connected to the outer surface of the housing, a bearing block is fixedly connected to the drive end of the drive shaft, a secondary turntable is fixedly connected to the outer surface of the drive shaft, and a belt is used for transmission between the secondary turntable and the main turntable.

[0009] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes the continuous rotation of a rotating disk to cause the sector gear to reciprocate and move the tooth column horizontally, thereby enabling the striking block to repeatedly strike the outer surface of the tube. This eliminates the subjective arbitrariness of manual operation, ensuring a high degree of consistency in the force, frequency, impact point, and interval of the strikes. It greatly improves the accuracy and repeatability of test data, providing a reliable and verifiable data foundation for fatigue life assessment. It completely liberates operators from high-intensity, monotonous, and easily damaging repetitive labor, eliminates the risk of human-caused health damage, achieves a qualitative leap in testing efficiency, significantly shortens the single test cycle, reduces time and labor costs, and improves the overall utilization efficiency of expensive testing equipment. This invention utilizes a combination of a reciprocating striking component and a rotating component to control the continuous rotation of the tube, ensuring that the striking load is evenly distributed across the circumferential area of ​​the entire outer surface of the tube. This allows for a more comprehensive and realistic simulation of the actual working conditions of the tube under random loads from different directions in a complex marine environment. The synergistic effect of rotation and striking enables comprehensive testing of the fatigue performance of the entire surface of the tube without any blind spots. It can not only assess the durability of welds or specific locations, but also reveal global fatigue weaknesses that may be caused by material anisotropy or manufacturing defects, greatly improving the completeness and reliability of the test and evaluation. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a side sectional view of the overall structure of this utility model; Figure 3 As shown in this utility model Figure 2 Enlarged structural diagram at point A; Figure 4 As shown in this utility model Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the connection structure between the sector gear and the tooth column shown in this utility model.

[0011] The numbers on the map are: 1. Casing; 2. Tube body; 5. Shelf; 6. Bearing block; 3. Reciprocating striking assembly; 31. Rotating shaft; 32. Rotating disk; 33. Shifting column; 34. Swing rod; 35. Sector gear; 36. Gear column; 37. Striking block; 38. Rotating column; 4. Rotating assembly; 41. Rotating shaft; 42. Main turntable; 43. Belt; 44. Sub-turntable; 45. Drive shaft. Detailed Implementation

[0012] 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.

[0013] Embodiments of this utility model Please refer to Figures 1 to 5 As shown, a loading device for testing the fatigue performance of a deep-sea flexible pipeline includes a pipe body 2, a housing 1 is provided on one side of the pipe body 2, and a shelf 5 is fixedly connected to the outer surface of the housing 1. The reciprocating striking assembly 3 is disposed between the housing 1 and the shelf 5, and is used to reciprocate horizontally to strike the outer surface of the tube 2. The reciprocating striking assembly 3 includes a rotating shaft 31 rotatably connected to the inside of the shelf 5, a rotating disk 32 fixedly connected to the outer surface of the rotating shaft 31, a shifting column 33 fixedly connected to the outer surface of the rotating disk 32, a rotating column 38 rotatably connected to the outer surface of the shelf 5, a swing rod 34 fixedly connected to the outer surface of the rotating column 38, a sector gear 35 fixedly connected to the bottom end of the swing rod 34, and a toothed column 36 slidably connected to the outer surface of the shelf 5, and the toothed column 36 meshes with the sector gear 35. A striking block 37 is fixedly connected to one end of the toothed column 36 near the tube 2. Additional explanation: A limiting groove is provided inside the swing rod 34. The diameter of the shifting column 33 is smaller than the groove width of the limiting groove. The shifting column 33 slides in the limiting groove. A limiting ring is fixedly connected to the outer surface of the shelf 5. The toothed column 36 slides inside the limiting ring. The storage rack 5 has a drive unit fixedly installed inside, and the drive unit is a dual-axis motor. One output end of the dual-axis motor is fixed to the rotating shaft 31. The above scheme utilizes the continuous rotation of the rotating disk 32 to cause the sector gear 35 to reciprocate and move the toothed column 36 horizontally. This causes the striking block 37 to reciprocate and strike the outer surface of the tube 2, eliminating the subjective arbitrariness of manual operation and ensuring a high degree of consistency in the striking force, frequency, impact point, and interval time. This greatly improves the accuracy and repeatability of the test data, providing a reliable and verifiable data basis for fatigue life assessment. It completely liberates operators from high-intensity, monotonous, and easily damaging repetitive labor, eliminates the risk of human-caused health damage, achieves a qualitative leap in testing efficiency, significantly shortens the single test cycle, reduces time and labor costs, and improves the overall utilization efficiency of expensive testing equipment.

[0014] Please refer to Figures 2 to 5 As shown, the rotating component 4 is disposed between the tube body 2 and the shelf 5, and the rotating component 4 is used to control the rotation of the tube body 2. The rotating component 4 includes a rotating shaft 41 rotatably connected to the inside of the shelf 5. The end of the rotating shaft 41 away from the shelf 5 is fixedly connected to the main turntable 42. The rotating component 4 also includes a drive shaft 45 rotatably connected to the outer surface of the housing 1. The drive end of the drive shaft 45 is fixedly connected to the bearing block 6. The outer surface of the drive shaft 45 is fixedly connected to the secondary turntable 44. The secondary turntable 44 and the main turntable 42 are connected by a belt 43. The reciprocating striking component 3 and the rotating component 4 are linked by a drive component, so that the tube body 2 rotates while reciprocatingly striking the outer surface of the tube body 2. Additional explanation: The other output end of the dual-axis motor is fixed to the rotating shaft 41. The diameter of the bearing block 6 is smaller than the diameter of the tube body 2, and the bearing block 6 is magnetically connected to the tube body 2. The above scheme is adopted: by using the reciprocating striking component 3 and the rotating component 4 in combination, and by controlling the continuous rotation of the tube body 2, it is ensured that the striking load can be evenly distributed on the circumferential area of ​​the entire outer surface of the tube body 2. This allows for a more comprehensive and realistic simulation of the actual working conditions of the tube body 2 under random loads from different directions in a complex marine environment. The synergistic effect of rotation and striking enables the detection of fatigue performance of the entire surface of the tube body 2 without blind spots. It can not only evaluate the durability of welds or specific parts, but also reveal global fatigue weaknesses that may be caused by material anisotropy or manufacturing process defects, greatly improving the completeness and reliability of the test evaluation.

[0015] Working principle and usage process of this utility model: First, the staff magnetically inserts the tube body 2 onto the outer surface of the support block 6. After the tube body 2 is installed stably, the dual-axis motor is started remotely, causing the rotating shaft 31 and rotating shaft 41 to rotate. The rotating disk 32 rotates with the rotating shaft 31, while the shifting column 33 located inside the swing rod 34 moves in a circle, thereby actuating the swing rod 34 to carry the sector gear 35 and swing back and forth along the rotating column 38. Through the meshing linkage between the sector gear 35 and the toothed column 36, the toothed column 36 carries the striking block 37 to reciprocate horizontally towards the outer surface of the tube body 2 for testing. At the same time, the main rotating disk 42 rotates with the rotation of the rotating shaft 41, and the secondary rotating disk 44 is linked by the belt 43 to rotate, thereby causing the drive shaft 45 to carry the support block 6 to rotate.

[0016] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover 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 process, method, article, or apparatus.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A loading device for testing the fatigue performance of deep-sea flexible pipelines, characterized in that, include: The tube body (2) has a shell (1) on one side, and a shelf (5) is fixedly connected to the outer surface of the shell (1). Reciprocating striking assembly (3), the reciprocating striking assembly (3) is disposed between the housing (1) and the shelf (5), and the reciprocating striking assembly (3) is used to reciprocate horizontally to strike the outer surface of the tube body (2); Rotating component (4), the rotating component (4) is disposed between the tube body (2) and the shelf (5), and the rotating component (4) is used to control the tube body (2) to rotate; Among them, the reciprocating striking component (3) and the rotating component (4) are linked by the driving component, so that the tube body (2) rotates while reciprocating striking the outer surface of the tube body (2).

2. The loading device for testing the fatigue performance of deep-sea flexible pipelines according to claim 1, characterized in that, The reciprocating striking assembly (3) includes a rotating shaft (31) rotatably connected inside the shelf (5), a rotating disk (32) fixedly connected to the outer surface of the rotating shaft (31), and a shifting column (33) fixedly connected to the outer surface of the rotating disk (32).

3. The loading device for testing the fatigue performance of deep-sea flexible pipelines according to claim 2, characterized in that, The reciprocating striking assembly (3) further includes a rotating column (38) rotatably connected to the outer surface of the shelf (5), and a swing rod (34) is fixedly connected to the outer surface of the rotating column (38), and a sector gear (35) is fixedly connected to the bottom end of the swing rod (34).

4. The loading device for testing the fatigue performance of deep-sea flexible pipelines according to claim 3, characterized in that, The reciprocating striking assembly (3) also includes a toothed column (36) slidably connected to the outer surface of the shelf (5), and the toothed column (36) meshes with the sector gear (35). A striking block (37) is fixedly connected to one end of the toothed column (36) near the tube body (2).

5. The loading device for testing the fatigue performance of deep-sea flexible pipelines according to claim 1, characterized in that, The rotating assembly (4) includes a rotating shaft (41) rotatably connected inside the shelf (5), and a main turntable (42) is fixedly connected to one end of the rotating shaft (41) away from the shelf (5).

6. The loading device for testing the fatigue performance of deep-sea flexible pipelines according to claim 5, characterized in that, The rotating assembly (4) further includes a drive shaft (45) rotatably connected to the outer surface of the housing (1). The drive end of the drive shaft (45) is fixedly connected to a bearing block (6). The outer surface of the drive shaft (45) is fixedly connected to a secondary turntable (44). A belt (43) is connected between the secondary turntable (44) and the main turntable (42).

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