CN-121977930-A - Freely rotatable ultra-long flexible pipe stretching experiment device

Abstract

The invention discloses a freely rotatable ultra-long flexible pipe stretching experimental device, and belongs to the technical field of ocean engineering equipment. The device comprises a first bracket, a second bracket and a third bracket which are quickly detached through bolts, wherein a supporting component and a transparent protective cover are respectively arranged, and the length of the second bracket can be expanded through the addition of the second bracket. The hydraulic telescopic rod of the first bracket is connected with the experimental sample tube through the first flange, and the rotating angle measuring assembly of the third bracket is connected with the other end of the sample tube through the second flange and the universal joint, so that free rotation and angle measurement are realized. The first support is provided with a stretching length measuring component which moves along with the hydraulic telescopic rod to measure the length, and the first support and the third support are matched with a support compression measuring component to monitor the deformation of the supports. The supporting component can adjust the height of the sampling tube to ensure horizontal stress. The device has the advantages of simple structure, detachability and adjustable length, solves the problems that the existing device has limited length and high price and can not measure the stretching rotation angle, and is suitable for the stretching mechanical test of the ultra-long flexible pipe.

Inventors

• Lei qinglong
• ZHOU YUJIE
• WU JUNRUI
• WANG KE
• MA PENG
• CHEN KEYU

Assignees

• 西南石油大学

Dates

Publication Date

20260505

Application Date

20260312

Claims (5)

1. 1. A freely rotatable ultra-long flexible pipe stretching experiment device is characterized by comprising a first support (1), a second support (2), a third support (3), a bolt (4), a support assembly (5), a transparent protective cover (6), a hydraulic telescopic rod (7), an experiment sample pipe (8), a rotation angle measurement assembly (9), a stretching length measurement assembly (10) and a support compression measurement assembly (11), wherein the first support (1), the second support (2) and the third support (3) can be rapidly detached through the bolt (4), the number of the second supports (2) can be increased, the length of the experiment device is increased, the support assembly (5) and the transparent protective cover (6) are arranged on the three supports, the support assembly (5) can provide support for the experiment sample pipe (8), the hydraulic telescopic rod (7) is fixed on the first support (1), the hydraulic telescopic rod (7) is connected with the experiment sample pipe (8) through a first flange plate (81), the rotation angle measurement assembly (9) is arranged on the third support (3), the other end of the ultra-long flexible pipe (82) is connected with a universal joint (91) through a second flange (83) to the universal joint (91), the device can measure the rotation angle of the experimental sample tube (8), the stretching length measuring component (10) is arranged on the first bracket (1), the stretching length of the experimental sample tube (8) can be measured, and the bracket compression measuring components (11) are arranged on the first bracket (1) and the third bracket (3), so that the deformation measurement of the experimental bench in the experimental process is realized.
2. 2. The freely rotatable ultra-long flexible pipe stretching experimental device according to claim 1, wherein the supporting component (5) comprises a movable sliding block (51), an experimental pipe supporting frame (52) and an adjusting bolt (53), the movable sliding block (51) is connected with a corresponding support through a sliding rail, the experimental pipe supporting frame (52) is connected with the movable sliding block (51) through the adjusting bolt (53), the height of the experimental pipe (8) supporting frame (52) can be adjusted, the supporting component (5) can ensure that the experimental pipe (8) is kept horizontal in the stretching process, the test result is prevented from being influenced by uneven stress, and the experimental pipe (8) is prevented from being broken and falls on the ground, so that a certain safety guarantee is provided.
3. 3. The freely rotatable ultra-long flexible pipe stretching experimental device according to claim 1, wherein the rotating angle measuring assembly (9) comprises a universal joint (91), an angle sensor (92), an angle sensor support (93), a synchronous belt (94) and a gear (95), the universal joint (91) is fixed on the third support (3), the angle sensor (92) is fixed on the angle sensor support (93), the angle sensor support (93) is fixed on the third support (3), and the rotating angle of the experimental sample pipe (8) is measured through the synchronous belt (94) and the gear (95).
4. 4. The device for stretching experiments of the freely rotatable ultra-long flexible pipe according to claim 1, wherein the stretching length measuring assembly (10) comprises a stretching sensor (101), a stretching sensor support (102), a fixing rod (103) and a connecting bolt (104), wherein the stretching sensor (101) is fixed on the stretching sensor support (102), the stretching sensor support (102) is connected with the first support (1) through a sliding rail, the fixing rod (103) is fixed on the stretching sensor support (102) through the connecting bolt (104) and is fixed with the hydraulic telescopic rod (7), and therefore the stretching length measuring assembly (10) can move along with the hydraulic telescopic rod (7), and the stretching length of the experimental pipe (8) can be measured.
5. 5. The freely rotatable ultra-long flexible pipe stretching experimental device is characterized in that displacement sensors are arranged in a bracket compression measurement assembly (11) and are respectively arranged on a first bracket (1) and a third bracket (3) and used for measuring deformation distances of corresponding brackets when a stretching experimental sample pipe (8) is stretched.

Description

Freely rotatable ultra-long flexible pipe stretching experiment device Technical Field The invention belongs to the technical field of ocean engineering equipment, and particularly relates to a freely rotatable ultra-long flexible pipe stretching experimental device which is particularly suitable for testing and inspection before ocean oil gas exploitation and submarine pipeline laying. Background The non-adhesive marine flexible pipe is one of important equipment for producing, storing and unloading a semi-submersible platform, is the only channel for connecting a submarine wellhead and the producing, storing and unloading the semi-submersible platform, plays an important role in submarine oil gas transportation, deep sea resource development and the like, belongs to essential marine oil gas engineering core equipment for deep sea oil gas exploitation, and is provided with special tools by processing joints at two ends of the flexible pipe when the mechanical property test is carried out on the flexible pipe, and on the other hand, the length of an experimental sample pipe is required to be more than 2 times of spiral winding pitch of a tensile armor layer, so that the length of the whole test object is greatly increased. In the practical testing work of the current flexible pipe stretching experiment, various requirements are put forward on an experimental device, firstly, the whole length of the testing tube is greatly increased after a connector and a tool are additionally arranged, the experimental device is required to have enough length adapting capability to meet the stretching testing requirement of an overlong test object, secondly, along with the cost reduction and synergy and multi-scene experiment requirements, a special experiment device with high cost performance and easy popularization is required to adapt to the stretching testing scene of the overlong flexible pipe, thirdly, the testing device can rotate in the stretching process based on the structural characteristics of spiral winding of the flexible pipe, so that the testing device is required to have free rotation adaptation, and meanwhile, multiple parameters such as stretching length, rotation angle and the like can be accurately detected, and the multi-dimensional testing data acquisition requirement is met. The device is provided with a displacement measuring module and a bending radius measuring module, axial displacement and bending direction displacement data are respectively acquired through a stay wire sensor and a displacement sensor, so that axial rigidity and bending rigidity of the pipeline are calculated, meanwhile, a temperature control module and a pressure control module are matched, mechanical response of the pipeline under high-temperature and high-pressure working conditions can be simulated, a matrix frame of the device is a fixed structure, the device does not have length expansion capability, only can adapt to flexible pipe testing of conventional length, can not meet the requirements of an extra-long flexible pipe testing after a joint and a tool are assembled or required to meet specific length requirements, and rotation characteristics of the flexible pipe in a stretching process due to a spiral winding structure are not considered, the axial rigidity and bending rigidity of the pipeline are not calculated, and meanwhile, the device is difficult to accurately compensate for deformation parameters of a bracket in a test process by matching with the rotation angle measuring module, and can not be accurately influenced by the rotation parameters of the bracket. The multiple working condition experimental device for the composite pipe with the patent number of CN202411430566 can be used for carrying out multiple working condition comprehensive tests and realizing the test of the composite working condition with single working condition of internal pressure, stretching, bending and torsion and any combination, but the length of the device is fixed and can not be expanded, and the device can only be matched with the conventional composite pipe with different lengths by sliding the sliding block along the guide rail, and has no ultra-long adaptation capability. The multifunctional marine flexible pipe bending and pressing combined experimental device based on the flexible vertical pipe has the advantages that 5 working condition tests such as internal pressure, external pressure, pulling and pressing, bending and vibration can be realized, the device is suitable for a general marine flexible vertical pipe, but a spiral winding structure of the flexible pipe is not considered, the device can rotate during stretching, the rotation angle cannot be measured, the flexible pipes with different lengths cannot be adapted, the novel marine flexible pipe bending and pressing combined experimental device based on the flexible vertical pipe has the patent number of CN201710730792, various combined working conditions can be reali