A test bench for measuring fatigue of flexible or articulated pipes

Abstract

An embodiment of the present invention provides a test bench for measuring the fatigue of flexible pipes or articulated pipes, comprising a test bench, and further comprising: a drive device, a flexible pipe clamp, and an articulated pipe clamp; the drive device is used to drive the flexible pipe clamp to clamp the flexible pipe to test the fatigue strength of the flexible pipe; the drive device is used to drive the articulated pipe clamp to clamp the articulated pipe to test the fatigue strength of the articulated pipe. A drive device, a flexible pipe clamp, and an articulated pipe clamp are provided on the basis of the test bench to measure the fatigue strength of flexible pipes or articulated pipes; the present invention can measure both flexible pipes and articulated pipes; thus, it solves the problem of existing testing equipment requiring two sets of equipment to measure flexible pipes and articulated pipes.

Description

Technical Field

[0001] The present invention relates to the technical field of fatigue test benches, in particular to a test bench for measuring the fatigue of flexible pipes or hinged pipes. Background Art

[0002] As ocean development continues to expand, the depth at which flexible marine pipes can be laid has also increased. In the early 1960s, the typical laying depth for flexible marine pipes was 20 meters. By the early 21st century, this had reached ultra-deep waters of 1,500-3,000 meters.

[0003] The design and production technology for offshore flexible pipes is now mature, with design and development continuously progressing towards ultra-deepwater applications. However, to date, my country's offshore oilfields, especially deepwater oil and gas fields, rely primarily on foreign manufacturers for flexible pipelines. These are not only expensive but also difficult to repair over time if accidents occur during use.

[0004] Therefore, when manufacturing flexible pipes and articulated pipes, it is critical to test their fatigue strength. The current fatigue test bench tests only one of the flexible pipes or articulated pipes. When measuring the flexible pipes and articulated pipes, two test benches are required, which is time-consuming, labor-intensive and inconvenient. Summary of the Invention

[0005] The present invention provides a test bench for measuring the fatigue of flexible or articulated pipes. Its purpose is to address the problem that existing fatigue test benches require two test benches to measure flexible and articulated pipes, which is time-consuming, labor-intensive, and inconvenient. To achieve this objective, the present invention employs the following technical solutions:

[0006] A test bench for measuring fatigue of a flexible pipe or a hinged pipe, comprising:

[0007] Drive device, flexible pipe clamp, hinged pipe clamp;

[0008] The driving device is used to drive the flexible pipe clamp to clamp the flexible pipe to test the fatigue strength of the flexible pipe;

[0009] The driving device is used to drive the articulated tube clamp to clamp the articulated tube and test the fatigue strength of the articulated tube.

[0010] Furthermore, it also includes: a shell, a base plate, and a mounting frame;

[0011] The driving device includes: a winding and separating device, a bending template mechanism, a track plate, a steel wire rope, a flexible pipe clamp, a lifting platform, a driving mechanism, a fixed pulley, and a U-shaped pipe clamp;

[0012] The housing and the driving mechanism are both arranged on the bottom plate; the mounting frame is arranged inside the housing; the winding and separating device and the track plate are both arranged on the mounting frame, the bending template mechanism is slidably arranged on the track plate; the lifting platform is slidably arranged on the mounting frame;

[0013] One end of the steel wire rope is rotatably mounted on the winding and separating device, and the other end of the steel wire rope is fixedly connected to the lifting platform. The steel wire rope passes through the fixed pulley and the bending template mechanism in sequence, and the driving mechanism is used to drive the winding and separating device to tighten or loosen the steel wire rope.

[0014] The U-shaped pipe clamp is arranged on the mounting frame, and the U-shaped pipe clamp is used to fix the flexible pipe; the flexible pipe clamp is arranged on the lifting platform, and the flexible pipe clamp is used to clamp the flexible pipe;

[0015] The articulated tube clamp includes: an upper articulated tube clamp and a lower articulated tube clamp; the upper articulated tube clamp is arranged on the winding and separation device, and the lower articulated tube clamp is arranged on the lifting platform; the articulated tube is clamped between the upper articulated tube clamp and the lower articulated tube clamp.

[0016] Furthermore, it also includes: a V-shaped pad, which is arranged at the bottom of the mounting frame and is used to support the flexible tube.

[0017] Furthermore, the driving mechanism includes: a servo motor and a universal transmission shaft, the servo motor is arranged on the base plate, the shaft end of the servo motor is coaxially arranged with one end of the universal coupling, and the other end of the universal coupling is arranged on the winding and separation device.

[0018] Furthermore, the winding and separation device includes: a wire rope winding and separation mechanism, a rotating mechanism, and the rotating mechanism and the wire rope winding and separation mechanism are detachably arranged; when testing the flexible tube, the wire rope winding and separation mechanism is separated from the rotating mechanism; when testing the articulated tube, the wire rope winding and separation mechanism is engaged with the rotating mechanism.

[0019] Furthermore, the upper articulated tube clamp is arranged on the rotating mechanism, and the lower articulated tube clamp is detachably arranged on the lifting platform.

[0020] Furthermore, the lifting platform is slidably arranged on the side surface of the mounting frame, and the lifting platform is arranged on the side surface of the mounting frame close to the winding and separating device.

[0021] Furthermore, there are two flexible pipe clamps, one of which is detachably arranged on the lifting platform, and the other flexible pipe clamp is slidably arranged on the other side of the mounting frame; the other end of the wire rope is fixedly connected to the other flexible pipe clamp.

[0022] Furthermore, it also includes a support base, which is arranged on the mounting frame; during the articulated tube experiment, the support base is used to support the articulated tube.

[0023] Compared with the prior art, the present invention provides the following advantages:

[0024] The present invention provides a test bench for measuring the fatigue of flexible pipes or articulated pipes. A driving device, a flexible pipe clamp, and an articulated pipe clamp are arranged on the basis of the test bench to measure the fatigue strength of flexible pipes or articulated pipes. The present invention can measure both flexible pipes and articulated pipes; therefore, it solves the problem that two experimental devices are needed to measure flexible pipes and articulated pipes in the existing practice.

[0025] In addition to the technical problems solved by the present invention, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, the present invention provides other technical problems that can be solved, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features, which will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0027] Figure 1 A schematic structural diagram of a test bench for measuring fatigue of a flexible pipe or an articulated pipe provided in an embodiment of the present invention;

[0028] Figure 2 This is a front view of the partial connection between the wire rope winding and separation mechanism and the rotating mechanism;

[0029] Figure 3 Schematic diagram of the structure of the measuring articulated tube.

[0030] Reference numerals:

[0031] 1. Winding and separation device; 2. Bending template mechanism; 3. Track plate; 4. Wire rope; 5. Flexible pipe clamp; 6. Flexible pipe; 7. U-shaped pipe clamp; 8. V-shaped pad; 9. Support seat; 10. Lifting platform; 11. Driving mechanism; 12. Universal joint; 13. Fixed pulley; 14. Housing; 15. Base plate; 16. Mounting frame; 17. Upper articulated pipe clamp; 18. Lower articulated pipe clamp; 19. Articulated pipe. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0033] See Figure 1-Figure 3 , and Table 1, an embodiment of the present invention provides a test bench for measuring fatigue of a flexible pipe or an articulated pipe, comprising: a winding and separating device 1, a bending template mechanism 2, a track plate 3, a wire rope 4, a flexible pipe clamp 5, a lifting platform 10, a driving mechanism 11, a fixed pulley 13, a housing 14, a bottom plate 15, a mounting frame 16, a U-shaped pipe clamp 7, an upper articulated pipe clamp 17, and a lower articulated pipe clamp 18;

[0034] refer to Figure 1 The housing 14 and the driving mechanism 11 are fixed to the bottom plate 15, and the outer bottom surface of the mounting frame 16 is fixed to the inner bottom surface of the housing 14; the winding and separating device 1 and the track plate 3 are both arranged on the rear of the mounting frame 16, and the bending template mechanism 2 is slidably arranged on the track plate 3; the lifting platform 10 is slidably arranged on the side of the mounting frame 16;

[0035] refer to Figure 1-2 The winding and separation device 1 includes: a wire rope winding and separation mechanism, a rotating mechanism, and the rotating mechanism and the wire rope winding and separation mechanism can be detachably connected. When the flexible tube 6 is tested, the wire rope winding and separation mechanism is separated from the rotating mechanism; when the articulated tube 19 is tested, the wire rope winding and separation mechanism is meshed and connected with the rotating mechanism.

[0036] refer to Figure 1 The driving mechanism 11 includes: a servo motor and a universal transmission shaft. The servo motor is arranged on the base plate 15. The shaft end of the servo motor is coaxially arranged with one end of the universal coupling. The other end of the universal coupling is arranged on the wire rope winding and separation mechanism for transmitting power to drive the wire rope winding and separation mechanism to tighten or loosen the wire rope 4.

[0037] refer to Figure 1 The lifting platform 10 is slidably arranged on the side of the mounting frame 16, and the lifting platform 10 is arranged on the side surface of the mounting frame 16 close to the side of the winding and separating device 1.

[0038] refer to Figure 1There are two flexible pipe clamps 5, one of which is bolted to the lifting platform 10, and the other is slidably arranged on the other side of the mounting frame 16, sliding up and down along the side. One end of the wire rope 4 is fixed to the winding and separating device 1, and the wire rope 4 is passed through the fixed pulley 13, the bending template mechanism 2, and finally fixedly connected to the other flexible pipe clamp 5.

[0039] refer to Figure 1 A U-shaped pipe clamp 7 is mounted at the bottom of the mounting bracket 16 and is used to secure the flexible pipe 6. During the flexible pipe 6 test, the U-shaped pipe clamp 7 prevents the right flexible pipe 6 from detaching from the right flexible pipe clamp 5. The servo motor drives the universal coupling 12 to rotate, which drives the winding and separation device 1 to tighten or loosen the wire rope 4. The wire rope 4 passes through the fixed pulley 13, causing the bending template mechanism 2 to move within the track plate 3. Finally, the wire rope 4 pulls the other flexible pipe clamp 5 up and down.

[0040] Specifically, refer to Figure 1 , also includes: a V-shaped pad 8, which is arranged at the bottom of the mounting frame 16 to support the flexible tube 6. During the flexible tube 6 test, the right side of the flexible tube 6 touches the bottom of the mounting plate when it is bent and lowered, thereby avoiding damage to the flexible tube 6 and the mounting plate.

[0041] It should be noted that the shell 14 is welded to the bottom plate 15. The winding and separation device 1 and the track plate 3 can be fixed to the back of the mounting frame 16 by screws. The bending template mechanism 2 is set in the curved slide rail of the track plate 3 for sliding bending, so that the steel wire rope 4 can drive the flexible tube 6 to make regular bending deformation, which is convenient for the data measurement of the flexible tube 6. The fixed pulley 13 is fixedly set on the top of the mounting frame 16 to change the direction of the steel wire rope 4. The winding and separation device 1 is as shown in FIG. Figure 1 、 2 It is set on the top surface of the mounting plate. The lifting platform 10 is slidably set on the left side of the mounting frame 16 and slides up and down along the left side. During the flexible tube 6 test, the U-shaped pipe clamp 7 fixes the flexible tube 6 to the mounting frame 16, so the lifting platform 10 is fixed. During the articulated tube 19 test, the upper articulated tube clamp 17 clamps the articulated tube 19 and twists the articulated tube 19 during rotation and deformation, which inevitably causes the lifting platform 10 at the lower end of the articulated tube 19 to rise, that is, the lower articulated tube clamp 18 set on the lifting platform 10 to rise, thus avoiding the articulated tube 19 from being stretched and reducing experimental errors. The flexible tube clamp 5 on the right and the lower articulated tube clamp 18 are both bolted to the lifting platform 10, which is convenient for disassembly. During the articulated tube 19 test, the lower articulated tube 19 is bolted to the lifting platform 10; during the flexible tube 6 test, the flexible tube clamp 5 on the left is bolted to the lifting platform 10.

[0042] refer to Figure 1 、3 The upper articulated tube clamp 17 is arranged on the rotating mechanism, and the lower articulated tube clamp 18 is detachably arranged on the lifting platform 10 ; the upper articulated tube clamp 17 and the lower articulated tube clamp 18 are used to clamp the articulated tube 19 .

[0043] Specifically, refer to Figure 1 , also includes a support seat 9, which is arranged at the bottom of the mounting frame 16. When the articulated tube 19 is tested, the support seat 9 is used to support the articulated tube 19.

[0044] 1. Test for measuring flexible pipe 6:

[0045] During the test, a flexible pipe 6 with a length of 3m to 3.5m and an inner diameter of 2in to 4in is installed on the flexible pipe fixture 5, and the entire test bench is placed in the temperature test chamber. Figure 1 、 2 One end of the flexible tube 6 is fixed to the left flexible tube fixture 5, and the other end is fixed to the right flexible tube fixture 5. The U-shaped tube clamp 7 secures the flexible tube 6 to the mounting bracket 16. According to the minimum bending radius of the flexible tube 6, as shown in Table 1, the servo motor drives the universal joint to rotate, which drives the wire rope reeling and separation mechanism to tighten or loosen the wire rope 4. The wire rope 4 passes over the fixed pulley 13, driving the bending template mechanism 2 to slide in the fan-shaped track groove of the track plate 3. The end of the wire rope 4 drives the right flexible tube fixture 5 to rise or fall, thereby stretching and bending the flexible tube 6, and then rebounding from the bend to straighten it, and the cycle repeats.

[0046] Bend 100 times at the lowest temperature (-60℃), bend 260 times at room temperature, and bend 260 times at room temperature under pressure (maximum test pressure 140MPa). The temperature test chamber meets the minimum operating temperature of -60℃.

[0047] 2. Test for measuring articulated tube 19:

[0048] During the test, the flexible tube 6 and the flexible clamp set on the lifting platform 10 must be removed first, and then the lower articulated tube 19 is installed on the lifting platform 10, and the articulated tube 19 line (inner diameter 1in, 11 / 2in, 2in, 21 / 2in, 3in, 4in) is fixed on the upper articulated tube clamp 17 and the lower articulated tube clamp 18. The support seat 9 can support the bent articulated tube 19; at this time, the wire rope winding and separation mechanism is engaged and connected with the rotation mechanism, and the universal coupling is driven to rotate by the servo motor, and the universal coupling drives the wire rope winding and separation mechanism to rotate, and the wire rope winding and separation mechanism drives the upper articulated tube clamp 17 to rotate, thereby achieving the dynamic range rotation test of measuring the articulated tube 19.

[0049] When testing articulated tube 19, place the test bench in a temperature test chamber. Lower articulated tube fixture 18 securely holds articulated tube 19, while upper articulated tube fixture 17 rotates 45° along with the wire rope reeling and separation mechanism. Perform a reciprocating cycle at least 620 times under rated pressure, with articulated tube 19 at only one rotation point within two planes at a 45° angle.

[0050] The specifications and basic parameters of flexible choke and kill pipelines are shown in Table 1:

[0051]

[0052] Table 1: Specifications and basic parameters of flexible choke and kill lines

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test bench for measuring fatigue of flexible pipes or articulated pipes, comprising a test bench, characterized in that: Also includes: Drive device, flexible pipe clamp, hinged pipe clamp; The driving device is used to drive the flexible pipe clamp to clamp the flexible pipe to test the fatigue strength of the flexible pipe; The driving device is used to drive the articulated tube clamp to clamp the articulated tube to test the fatigue strength of the articulated tube; Also includes: a shell, a base plate, and a mounting frame; The driving device includes: a winding and separating device, a bending template mechanism, a track plate, a steel wire rope, a flexible pipe clamp, a lifting platform, a driving mechanism, a fixed pulley, and a U-shaped pipe clamp; The housing and the driving mechanism are both arranged on the bottom plate; the mounting frame is arranged inside the housing; the winding and separating device and the track plate are both arranged on the mounting frame, the bending template mechanism is slidably arranged on the track plate; the lifting platform is slidably arranged on the mounting frame; One end of the steel wire rope is rotatably mounted on the winding and separating device, and the other end of the steel wire rope is fixedly connected to the lifting platform. The steel wire rope passes through the fixed pulley and the bending template mechanism in sequence, and the driving mechanism is used to drive the winding and separating device to tighten or loosen the steel wire rope. The U-shaped pipe clamp is arranged on the mounting frame, and the U-shaped pipe clamp is used to fix the flexible pipe; the flexible pipe clamp is arranged on the lifting platform, and the flexible pipe clamp is used to clamp the flexible pipe; The articulated tube fixture comprises: an upper articulated tube fixture and a lower articulated tube fixture; the upper articulated tube fixture is arranged on the winding and separating device, and the lower articulated tube fixture is arranged on the lifting platform; the articulated tube is clamped between the upper articulated tube fixture and the lower articulated tube fixture; The driving mechanism includes a servo motor and a universal coupling. The servo motor is arranged on the base plate. The shaft end of the servo motor is coaxially arranged with one end of the universal coupling. The other end of the universal coupling is arranged on the winding and separating device.

2. A test bench for measuring fatigue of flexible pipes or articulated pipes according to claim 1, characterized in that: Also includes: A V-shaped spacer is provided at the bottom of the mounting frame and is used to support the flexible pipe.

3. A test bench for measuring fatigue of flexible pipes or articulated pipes according to claim 1, characterized in that: The winding and separation device includes: a wire rope winding and separation mechanism and a rotating mechanism. The rotating mechanism and the wire rope winding and separation mechanism are detachable. During the flexible tube test, the wire rope winding and separation mechanism is separated from the rotating mechanism. During the articulated tube test, the wire rope winding and separation mechanism is engaged with the rotating mechanism.

4. A test bench for measuring fatigue of flexible pipes or articulated pipes according to claim 3, characterized in that: The upper hinged tube clamp is arranged on the rotating mechanism, and the lower hinged tube clamp is detachably arranged on the lifting platform.

5. A test bench for measuring fatigue of flexible pipes or articulated pipes according to claim 1, characterized in that: The lifting platform is slidably arranged on the side surface of the mounting frame, and the lifting platform is arranged on the side surface of the mounting frame close to the winding and separating device.

6. A test bench for measuring fatigue of flexible pipes or articulated pipes according to claim 5, characterized in that: There are two flexible pipe clamps, one of which is detachably arranged on the lifting platform, and the other is slidably arranged on the other side of the mounting frame; the other end of the wire rope is fixedly connected to the other flexible pipe clamp.

7. A test bench for measuring fatigue of flexible pipes or articulated pipes according to claim 1, characterized in that: It also includes a support base, which is arranged on the mounting frame; during the articulated tube test, the support base is used to support the articulated tube.

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