Fatigue test platform for marine flexible pipe cable

Abstract

The utility model discloses a marine flexible pipe cable fatigue test platform, and relates to the technical field of flexible pipe cable fatigue test. The device comprises a support, a first fixing frame is fixedly installed at one end of the top of the support, a first actuator, a second actuator and a third actuator are arranged on the lower portion in the first fixing frame, the second actuator is located between the first actuator and the third actuator, and the third actuator is located between the first actuator and the third actuator. A bottom plate is fixedly mounted at the bottom of the second actuator; the test bench can adapt to pipe cables with different lengths and diameters through the stepless adjusting device, the overall flexibility and applicability of the system are enhanced, the performance of the pipe cables under different working conditions can be comprehensively evaluated through the three-point bending test and the tension-torsion test function, richer data support is provided, the reliability of the pipe cables in actual use is ensured, and the test bench is suitable for popularization and application. Through introduction of various testing methods, more accurate fatigue characteristic data can be obtained, and understanding of the performance of the pipe cable in long-term use is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of fatigue testing technology for flexible cables, specifically a fatigue testing platform for marine flexible cables. Background Technology

[0002] Research on the impact of deep-sea environment on flexible tubing: By simulating factors such as flow, temperature, and pressure in the deep-sea environment, the test platform can study the impact of these environmental factors on flexible tubing. However, the current test platform may not be able to adapt to various types and specifications of tubing, which limits the flexibility of testing. Frequent switching between different test specimens and matching tooling leads to reduced testing efficiency and extended test cycles. The lack of three-point bending and tension-torsion tests makes it impossible to comprehensively evaluate the performance of tubing under various working conditions, limiting the laboratory's comprehensive analytical capabilities for tubing performance. Utility Model Content

[0003] In order to solve the above problems, the purpose of this utility model is to provide a fatigue testing platform for marine flexible tubular cables.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a marine flexible cable fatigue testing platform, including a support frame, a first fixed frame fixedly installed at one end of the top of the support frame, a first actuator, a second actuator, and a third actuator respectively installed below the first fixed frame, the second actuator being between the first actuator and the third actuator, a base plate fixedly installed at the bottom of the second actuator, a first electric push rod fixedly installed directly below the base plate inside the support frame, the output end of the first electric push rod fixedly installed on the base plate, an anti-bending device hingedly installed at the end of the first fixed frame near the first actuator, a fixed adjustment device fixedly installed at the end of the anti-bending device away from the first frame, a second fixed frame fixedly installed at the end of the first fixed frame away from the anti-bending device on the base plate, horizontal crossbars fixedly installed at the four corners of the second fixed frame, a movable plate inserted on the four crossbars, a second electric push rod fixedly installed at the end of the second fixed frame away from the first fixed frame, the output end of the second electric push rod coaxially fixedly installed on the movable plate, a torque testing device installed on the side of the movable plate facing the first fixed frame.

[0005] Preferably, a hydraulic cylinder is fixedly provided at one end of the first fixed frame near the anti-bend device, and the output end of the hydraulic cylinder is on the anti-bend device.

[0006] Preferably, the fixing and adjusting device includes a mounting frame, with lead screws rotatably provided at the four corners of the mounting frame, and an adjusting plate threaded together between the four lead screws. A first motor is fixedly provided at the end of the mounting frame away from the first fixing frame and close to each lead screw, and the output end of the first motor is coaxially fixedly provided on the lead screw.

[0007] Preferably, the torque testing device includes a mounting plate, a large gear is fixedly provided at the center of one side of the mounting plate, a small gear is meshed with the large gear at the edge of the mounting plate, and a second motor is fixedly provided on the mounting plate near the small gear, with the output end of the second motor coaxially fixed on the small gear.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] The stepless adjustment device allows the test bench to adapt to cables of different lengths and diameters, enhancing the overall flexibility and applicability of the system. The three-point bending test and tension-torsion test functions can comprehensively evaluate the performance of cables under different working conditions, providing richer data support and ensuring the reliability of cables in actual use. By introducing multiple test methods, more accurate fatigue characteristic data can be obtained, which is beneficial to understanding the performance of cables in long-term use. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the torque testing device of this utility model.

[0013] In the diagram: 1. Bracket; 11. First fixed frame; 12. First actuator; 13. Second actuator; 14. Third actuator; 15. Base plate; 16. First electric push rod; 2. Anti-bending device; 21. Mounting frame; 22. Adjusting plate; 23. Lead screw; 24. First motor; 25. Hydraulic cylinder; 3. Second fixed frame; 31. Movable plate; 32. Crossbar; 33. Second electric push rod; 34. Mounting plate; 35. Large gear; 36. Small gear; 37. Second motor. Detailed Implementation

[0014] 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.

[0015] Example: Figure 1-2 As shown, this utility model provides a fatigue testing platform for marine flexible tubing cables, including a support frame 1. A first fixing frame 11 is fixedly installed at one end of the top of the support frame 1. A first actuator 12, a second actuator 13, and a third actuator 14 are respectively installed below the first fixing frame 11. The second actuator 13 is located between the first actuator 12 and the third actuator 14. A base plate 15 is fixedly installed at the bottom of the second actuator 13. A first electric push rod 16 is fixedly installed inside the support frame 1 directly below the base plate 15. The output end of the first electric push rod 16 is fixedly installed on the base plate 15. The first fixing frame 11 is close to the first... One end of the actuator 12 is hinged to a bend preventer 2. The end of the bend preventer 2 away from the first frame is fixed to a fixing adjustment device. The end of the first fixed frame 11 away from the bend preventer 2 is fixed to a second fixed frame 3. Horizontal crossbars 32 are fixed at the four corners of the second fixed frame 3. Movable plates 31 are inserted into the four crossbars 32. A second electric push rod 33 is fixed at the end of the second fixed frame 3 away from the first fixed frame 11. The output end of the second electric push rod 33 is coaxially fixed on the movable plate 31. A torque testing device is installed on the side of the movable plate 31 facing the first fixed frame 11.

[0016] A hydraulic cylinder 25 is fixedly installed at one end of the first fixed frame 11 near the anti-bend device 2. The output end of the hydraulic cylinder 25 is on the anti-bend device 2. The extension and retraction of the output end of the hydraulic cylinder 25 can control the anti-bend device 2, which is hinged at the end of the first fixed frame 11, to swing. This allows for adjustment when the cable installed in the device is bent.

[0017] The fixed adjustment device includes a mounting frame 21, with lead screws 23 rotatably mounted at the four corners of the mounting frame 21. An adjustment plate 22 is threaded together among the four lead screws 23. A first motor 24 is fixedly mounted near each lead screw 23 at the end of the mounting frame 21 away from the first fixed frame 11. The output end of the first motor 24 is coaxially fixed on the lead screw 23.

[0018] The torque testing device includes a mounting plate 34. A large gear 35 is fixedly mounted at the center of one side of the mounting plate 34. A small gear 36 meshes with the large gear 35 at the edge of the mounting plate 34. A second motor 37 is fixedly mounted on the mounting plate 34 near the small gear 36. The output end of the second motor 37 is coaxially fixed on the small gear 36.

[0019] Working principle: During use, the first motor 24 drives the lead screw 23 to rotate in the fixed adjustment device at the front end of the anti-bend device 2. At this time, the adjustment plate 12 with threads on the lead screw 23 will be driven to move horizontally. Only the front and rear fixed panels need to be adjusted to meet different installation requirements. At the same time, the second electric push rod 33 at the tail end can push the movable plate 31 to move, which can infinitely adjust the distance at the tail end to adapt to the testing requirements of different pipes and cables. In addition, for the limited measurement range, we designed a three-point bending test function block and a tension and torsion test function block. The second actuator designed in the middle can be driven by the first electric push rod 16 to move upward, which can control the pipe and cable to perform a three-point bending test. The bottom of the actuator can also be adjusted to meet the three-point bending test of different parts of different test pieces. At the same time, the second motor 37 at the tail end can drive the small gear 36 to rotate. The rotating small gear 36 will drive the large gear 35 that meshes with it to rotate. The rotating large gear 35 will rotate the pipe and cable in the mounting plate 34 and apply torque to meet the requirements of tension and torsion test.

[0020] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A platform for fatigue testing of marine flexible pipe umbilicals, comprising a support (1), characterised in that: One end of the top of the support (1) is fixedly provided with a first fixed frame (11), below which in the first fixed frame (11) is respectively provided with a first actuator (12), a second actuator (13) and a third actuator (14), the second actuator (13) is the middle of the first actuator (12) and the third actuator (14), the bottom of the second actuator (13) is fixedly provided with a bottom plate (15), the support (1) is fixedly provided with a first electric push rod (16) below the bottom plate (15), the output end of the first electric push rod (16) is fixedly arranged on the bottom plate (15), the end of the first fixed frame (11) close to the first actuator (12) is hingedly provided with a bending preventer (2), the end of the bending preventer (2) away from the first frame body is fixedly provided with a fixed adjusting device, the end of the first fixed frame (11) away from the bottom plate (15) and the bending preventer (2) is fixedly provided with a second fixed frame (3), the four corners of the second fixed frame (3) are fixedly provided with horizontally arranged cross bars (32), four cross bars (32) are commonly provided with a movable plate (31), the end of the second fixed frame (3) away from the first fixed frame (11) is fixedly provided with a second electric push rod (33), the output end of the second electric push rod (33) is coaxially fixedly arranged on the movable plate (31), the side of the movable plate (31) facing the first fixed frame (11) is provided with a torque testing device.

2. The marine flexible pipe cable fatigue test platform of claim 1, wherein, The end of the first fixed frame (11) close to the bending preventer (2) is fixedly provided with a hydraulic cylinder (25), and the output end of the hydraulic cylinder (25) is arranged on the bending preventer (2).

3. The marine flexible pipe cable fatigue test platform of claim 1, wherein, The fixed adjusting device comprises a mounting frame (21), four corners in the mounting frame (21) are rotatably provided with lead screws (23), four lead screws (23) are commonly and threadedly provided with an adjusting plate (22), the end of the mounting frame (21) away from the first fixed frame (11) is fixedly provided with a first motor (24) close to each lead screw (23), and the output end of the first motor (24) is coaxially fixedly arranged on the lead screw (23).

4. The marine flexible pipe cable fatigue test platform of claim 1, wherein, The torque testing device comprises a mounting plate (34), one side of the mounting plate (34) is fixedly provided with a large gear (35) at the center, the edge of the mounting plate (34) is engagedly provided with a small gear (36) engaged with the large gear (35), the mounting plate (34) is fixedly provided with a second motor (37) close to the small gear (36), and the output end of the second motor (37) is coaxially fixedly arranged on the small gear (36).

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