CN110220772B - Multifunctional mechanical property test device for marine pipe based on flexible vertical pipe - Google Patents
Multifunctional mechanical property test device for marine pipe based on flexible vertical pipe Download PDFInfo
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- CN110220772B CN110220772B CN201910643359.3A CN201910643359A CN110220772B CN 110220772 B CN110220772 B CN 110220772B CN 201910643359 A CN201910643359 A CN 201910643359A CN 110220772 B CN110220772 B CN 110220772B
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- 238000005452 bending Methods 0.000 claims abstract description 115
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- 239000010720 hydraulic oil Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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Abstract
The invention relates to a flexible riser based multifunctional mechanical property test device for an ocean pipe, which comprises: an outer tube assembly; a sealing end cap for closing both ends of the marine pipe to form a second closed space capable of applying an internal pressure inside the marine pipe; the pivoting assembly comprises flange plates, and two ends of the marine pipe are respectively sleeved with one flange plate and are pivoted to the test support through the flange plates; the bending test assembly is connected to the flanges positioned at the two ends of the marine pipe and can enable the two flanges to rotate back and forth within a specific angle range by repeatedly changing the length of a part positioned between the two flanges so as to bend the marine pipe to test the bending performance of the marine pipe; the flexible outer pipe assembly has better bending performance, can bend adaptively along with the marine pipe when the marine pipe is bent, and can bear larger bending.
Description
Technical Field
The invention relates to the field of mechanical property test devices, in particular to a flexible riser-based marine pipe multifunctional mechanical property test device.
Background
The marine pipeline comprises a submarine oil and gas gathering and transporting pipeline, a main pipeline, a riser pipe connected with a platform and the like, and is used for gathering oil or natural gas produced by an offshore oil and gas field and transporting the oil or natural gas to a single-point mooring of a mooring oil tanker or to a land oil and gas storage station. The marine pipeline is transported in the same process as an onshore pipeline, but is subjected to various working loads and environmental loads more complicated than onshore because marine pipeline engineering is performed in the sea. With the continuous exploration and transportation of marine oil and gas resources, the demand of marine pipelines is increasing continuously, the marine pipelines are the most important transportation mode for marine oil and gas exploitation, and the safety of the installation process and the stability of the working state of the marine oil and gas pipelines are directly related to the normal exploitation of marine resources. Due to its complex marine environment, the working load and environmental load of marine pipelines are very complex, such as wind, waves, currents and earthquakes. Ensuring that the marine pipeline can still work well under various complex environments is a necessary guarantee for ensuring the exploitation of marine oil and gas, so that the design of a mechanical property testing device for the marine pipeline is very necessary. Chinese patent publication No. CN107515150A discloses an experimental apparatus for comprehensive testing of mechanical properties of marine pipelines, which comprises a tension-compression testing apparatus, a four-point bending testing apparatus, an external pressure testing apparatus, an internal pressure testing apparatus and a groove-shaped base; the tension and compression testing device comprises two groups of tension and compression testing components which are oppositely arranged on the groove-shaped base, and the tension and compression testing components realize clamping action and tension and compression action on the testing pipe fitting; the four-point bending testing device adopts a four-point bending principle to realize the four-point bending effect on the testing pipe fitting; external pressure testing arrangement realizes applying outside hydraulic pressure to the periphery of testing the pipe fitting, and interior pressure testing arrangement realizes applying inside hydraulic pressure to the interior circumference of testing the pipe fitting. The four sets of test sub-devices are not directly connected and can be randomly combined with other test sub-devices, so that the random combination of pulling, pressing, bending, internal pressing and external pressing can be realized, the defect of simplification of test contents of the traditional experimental device is overcome, and the experimental device is more diversified in experimental form, powerful in function and complete in performance. However, the devices which are not directly connected are inconvenient to assemble and install and are complex to operate. Therefore, there is a need for improvements in the prior art.
For flexible pipe joints, the prior art can refer to li xiangyun, ocean non-bonding flexible pipe joint structure design and analytical research [ D ] major connection, university of major graduates, 2014, and maoqingka, ocean flexible pipe joint design key problem research [ D ] major connection, university of major graduates, 2013.
Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a flexible riser-based marine pipe multifunctional mechanical property test device, in particular to a device for a marine pipe mechanical property test, which is characterized by comprising the following components: an outer tube assembly for hermetically encasing at least a portion of the marine tube therein to form a first enclosed space between the marine tube and the outer tube assembly that is capable of applying external pressure outside the marine tube; a sealing end cap for closing both ends of the marine pipe to form a second closed space capable of applying an internal pressure inside the marine pipe; the pivoting assembly comprises flange plates, and two ends of the marine pipe are respectively sleeved with one flange plate and are pivoted to the test support through the flange plates; the bending test assembly is connected to the flanges positioned at the two ends of the marine pipe and can enable the two flanges to rotate back and forth within a specific angle range by repeatedly changing the length of a part positioned between the two flanges so as to test the bending performance of the marine pipe in a bending mode; wherein the outer tube assembly is flexible to bend with the marine tube while the marine tube is bent.
According to a preferred embodiment, the bending test assembly comprises a first bending hydraulic cylinder, a second bending hydraulic cylinder, a first rope and a second rope, the first cylinder of the first bending hydraulic cylinder is pivoted on the flange at one end of the marine pipe, the first piston rod of the first bending hydraulic cylinder is flexibly connected on the flange at the other end of the marine pipe through the first rope, the second cylinder of the second bending hydraulic cylinder is pivoted on the flange at one end of the marine pipe, the second piston rod of the second bending hydraulic cylinder is flexibly connected on the flange at the other end of the marine pipe through the second rope, and the first bending hydraulic cylinder and the first rope are located at one side of the marine pipe and the second bending hydraulic cylinder and the second rope are located at the other side of the marine pipe, wherein the first bending hydraulic cylinder and the second bending hydraulic cylinder repeat opposite actions to each other to repeatedly change the bending test assembly between the two flanges by repeating changes in direction of the bending test assembly The length of the members is such that the two flanges can be rotated back and forth within a specified angular range to test the bending performance of the marine pipe.
According to a preferred embodiment, the first bending hydraulic cylinder and the second bending hydraulic cylinder repeatedly move in opposite directions to each other, namely, the first bending hydraulic cylinder and the second bending hydraulic cylinder repeatedly extend and contract and the extending and contracting movements are opposite in the process of performing the bending test on the marine pipe.
According to a preferred embodiment, the outer pipe assembly comprises a flexible outer pipe and a flexible pipe joint, two ends of the flexible outer pipe are connected through one flexible pipe joint respectively, one end of the flexible pipe joint is sleeved outside the flexible outer pipe, the flexible outer pipe and the flexible pipe joint bend along with the marine pipe when the marine pipe is bent, the flexible outer pipe can slide and displace relative to the flexible pipe joint when the flexible outer pipe is bent, the flange plate comprises a plate body and/or a sealing interface, the plate body and the sealing interface are connected with each other to form a whole, and the flange plate further comprises a sleeving hole, and the sleeving hole penetrates through the plate body and the sealing interface so that the flange plate can be sleeved on the marine pipe through the sleeving hole.
According to a preferred embodiment, the flexible pipe joint is a non-bonded flexible pipe joint.
According to a preferred embodiment, the device comprises a tension and compression test assembly, the tension and compression test assembly comprises a first fixing frame, a second fixing frame, a tension hydraulic cylinder and a fixing rod, the stretching hydraulic cylinder comprises a third cylinder body and a third piston rod, the first fixing frame is connected to a flange plate at one end of the marine pipe through bolts or threads, one of the third cylinder body and the third piston rod is connected to a sealing end cover at one end of the marine pipe, the other of the third cylinder body and the third piston rod is connected to the first fixing frame, the second mount passes through bolt or threaded connection on the ring flange that is located the other end of marine pipe, and the one end of dead lever is connected on the sealed end cover that is located the other end of marine pipe, and the other end of dead lever is connected on the second mount, and first mount and second mount rotate along with the ring flange synchronous with it is connected.
According to a preferred embodiment, the device further comprises a vibration test assembly, the vibration test assembly comprises a pipeline clamp, a vibration hydraulic cylinder and a vibration base, the vibration hydraulic cylinder comprises a fourth cylinder body and a fourth piston rod, one of the fourth cylinder body and the fourth piston rod is connected to the vibration base, the other of the fourth cylinder body and the fourth piston rod is connected to the pipeline clamp through a bolt, the pipeline clamp comprises a rubber pad and two semicircular pipe clamps, the two pipe clamps are connected through bolts to surround the flexible outer pipe, the rubber pad is arranged between the pipe clamps and the flexible outer pipe, and the vibration base is at least arranged to move relative to the test support along with the bending of the flexible outer pipe so that the vibration base is always positioned under the pipeline clamp, so that the device applies vertical vibration load to the marine pipe through repeated stretching of the vibration hydraulic cylinder.
According to a preferred embodiment, the vibration base is provided with at least three moving wheels for supporting the vibration base, preferably the moving wheels are universal wheels.
According to a preferred embodiment, the mechanical property test comprises: the device can be used for independently carrying out one of an internal pressure test, an external pressure test, a bending test, a tension and compression test and a vibration test on the marine pipe, or simultaneously carrying out a combined test of any two tests, a combined test of any three tests, a combined test of any four tests or a combined test of five tests on the marine pipe.
According to a preferred embodiment, the invention relates to a method for testing the mechanical property of a marine pipe based on a flexible riser, in particular to a method for testing the mechanical property of a marine pipe.
The invention provides a flexible riser-based multifunctional mechanical property test device for an ocean pipe, which at least has the following advantages:
firstly, the internal pressure test, the external pressure test and the bending test are skillfully integrated by the combination of the flange plate and the flexible outer pipe assembly, and the structures are simplified and the operation is convenient by skillfully associating the flange plates through the tests;
secondly, the bending test of the invention is different from a four-point bending method, the four-point bending method has a specific bending direction in the test process and cannot be bent back and forth like the four-point bending method, so as to simulate the repeated load applied to the marine pipe by the marine environment as truly as possible and obtain more reliable test data;
thirdly, compared with the test in the pressure-resistant cabin mentioned in the background technology, the flexible outer pipe assembly has better bending performance, can bend adaptively along with the marine pipe when the marine pipe is bent, can bear larger bending, and is limited by the volume and the bending of the pressure-resistant cabin;
fourthly, in the structures disclosed by some embodiments, the internal pressure test, the external pressure test, the bending test and the tension-compression test are skillfully associated by the flange plate, so that the structure is further simplified, and the operation is also facilitated;
fifth, in some embodiments disclosed configurations, the device can be used to perform one of an internal pressure test, an external pressure test, a bending test, a tension and compression test, and a vibration test on the marine vessel alone. Or the device can simultaneously carry out a combined test of any two tests, a combined test of any three tests, a combined test of any four tests and/or a combined test of five tests in an internal pressure test, an external pressure test, a bending test, a tension-compression test and a vibration test on the marine pipe.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the components of the present invention;
FIG. 3 is a simplified partial cross-sectional view of a preferred embodiment of the present invention;
FIG. 4 is a simplified cross-sectional view of a preferred embodiment of a flange;
FIG. 5 is a schematic view of a preferred embodiment of a flange;
FIG. 6 is a simplified schematic illustration of a preferred embodiment of a hermetic end cap; and
FIG. 7 is a simplified schematic bottom view of a preferred embodiment of the vibrating base.
List of reference numerals
100: test rack 200: tension and compression test assembly 210: first fixing frame
220: second fixing frame 230: the stretching hydraulic cylinder 231: third cylinder
232: third piston rod 240: fixing the rod 300: bending test assembly
310: first bending hydraulic cylinder 311: the first cylinder 312: first piston rod
320: second bending hydraulic cylinder 321: second cylinder 322: second piston rod
330: first rope 340: second rope 400: vibration test assembly
410: the pipe clamp 420: the vibration hydraulic cylinder 421: the fourth cylinder body
422: fourth piston rod 430: the vibration base 431: movable wheel
500: the outer tube assembly 510: flexible outer tube 520: flexible pipe joint
600: marine pipe 700: the pivoting assembly 710: first seal ring
720: second seal ring 730: flange plate 731: dish body
732: the seal interface 733: the socket hole 740: flange clamp
741: first mount 742: second mount 743: detachable card seat
800: sealing end cap 810: third seal ring
Detailed Description
The following detailed description is made with reference to the accompanying drawings.
Example 1
The embodiment discloses a multifunctional mechanical property test device for an ocean pipe based on a flexible riser, or a device for a mechanical property test of the ocean pipe, or a mechanical property test device, or a device for testing the mechanical property of a pipeline, wherein the names of the devices can be replaced by equal names, and in the invention, the device or the device are short names. The preferred embodiments of the present invention are described in whole and/or in part in the context of other embodiments, which can supplement the present embodiment, without resulting in conflict or inconsistency.
According to a preferred embodiment, with reference to figures 1, 2 and 3, the device comprises: at least one of the test stand 100, the tension and compression test assembly 200, the bending test assembly 300, the vibration test assembly 400, the outer tube assembly 500, the pivot assembly 700, and the sealing end cap 800. The outer tube assembly 500 may be used to hermetically encase at least a portion of a marine tube 600 therein. Thereby, a first closed space capable of applying external pressure to the outside of the marine pipe 600 is formed between the marine pipe 600 and the outer pipe assembly 500. The sealing end caps 800 may be used to close both ends of the marine pipe 600 to form a second closed space capable of applying internal pressure inside the marine pipe 600. The pivot assembly 700 may include a flange 730, see fig. 3, 4 and 5. The ends of the marine pipe 600 may each be sleeved with a flange 730 and pivotally connected to the test rack 100 via the flanges 730. The bend test assembly 300 can be attached to flanges 730 at both ends of the marine pipe 600 and can test the bending performance of the marine pipe 600 by repeatedly changing the length of the part between the two flanges 730 to allow the two flanges 730 to rotate back and forth within a specific angular range to bend the marine pipe 600. The outer tube assembly 500 may be flexible. Thereby, the marine pipe 600 is bent while the marine pipe 600 is bent. Preferably, the test stand 100 may be arranged to be fixed relative to the ground during testing. Alternatively, the test stand 100 may be fixed to the ground during testing. Preferably, in the present invention, the flexible outer tube may refer to a flexible outer tube. The invention can at least realize the following beneficial technical effects by adopting the mode: firstly, the internal pressure test, the external pressure test and the bending test are skillfully integrated by the combination of the flange plate and the flexible outer pipe assembly; secondly, the bending test of the invention is different from a four-point bending method, the four-point bending method has a specific bending direction in the test process and cannot be bent back and forth like the four-point bending method, so as to simulate the repeated load applied to the marine pipe by the marine environment as truly as possible and obtain more reliable test data; thirdly, compared with the test in the pressure-resistant cabin mentioned in the background art, the flexible outer pipe assembly has better bending performance, the marine pipe 600 is bent and is bent adaptively along with the marine pipe 600, the marine pipe assembly can bear larger bending, and the pressure-resistant cabin is limited by volume and is also limited in bending.
According to a preferred embodiment, the bend testing assembly 300 may include at least one of a first bend cylinder 310, a second bend cylinder 320, a first cable 330, and a second cable 340. The first cylinder 311 of the first bending cylinder 310 may be pivoted to a flange 730 at one end of the marine pipe 600. The first piston rod 312 of the first bending cylinder 310 may be flexibly connected to a flange 730 at the other end of the marine pipe 600 by a first cable 330. The second cylinder 321 of the second bending cylinder 320 may be pivoted to a flange 730 at one end of the marine pipe 600. The second piston rod 322 of the second bending cylinder 320 may be flexibly connected to a flange 730 at the other end of the marine pipe 600 by a second cable 340. The first bending cylinder 310 and the first rope 330 may be located on one side of the marine pipe 600. The second bending cylinder 320 and the second rope 340 may be located on the other side of the marine pipe 600. The first bending cylinder 310 and the second bending cylinder 320 can repeatedly move in opposite directions to each other to test the bending performance of the marine pipe 600 by repeatedly changing the length of the part of the bending test assembly 300 between the two flanges 730 to allow the two flanges 730 to rotate back and forth within a specific angle range. Preferably, the repeated reverse motions of first bending hydraulic cylinder 310 and second bending hydraulic cylinder 320 with respect to each other may mean that both first bending hydraulic cylinder 310 and second bending hydraulic cylinder 320 are repeatedly extended and retracted and the extending and retracting motions are opposite. That is, the second piston rod of the second bending cylinder 320 is retracted inward as the first piston rod of the first bending cylinder 310 is extended outward. Alternatively, the first piston rod of the first bending cylinder 310 is retracted inwardly while the second piston rod of the second bending cylinder 320 is extended outwardly. The invention can at least realize the following beneficial technical effects by adopting the mode: firstly, the combination of the first bending hydraulic cylinder 310 and the first rope 330 and the combination of the second bending hydraulic cylinder 320 and the second rope 340 are adopted, so that the connection between the two flange plates can be met without using an overlong hydraulic cylinder, and the cost is saved; secondly, because the first bending hydraulic cylinder 310 and the second bending hydraulic cylinder 320 are flexibly connected to the flange 730 at the other end through the first rope and the second rope respectively, in the process of relative rotation of the two flanges, the flexible first rope or the flexible second rope can eliminate most radial force through the deformation of the flexible first rope or the flexible second rope, so that the first piston rod 312 or the second piston rod 322 mainly bears the axial force in the telescopic direction, the early damage of the first bending hydraulic cylinder 310 and the second bending hydraulic cylinder 320 under severe working conditions is avoided, and the reliability of the invention is stronger.
Preferably, the outer tube assembly 500 is used to hermetically encase at least a portion of the marine tube 600 therein to provide external pressure for testing, which may refer to providing external pressure to the portion of the marine tube 600 encased within the outer tube assembly 500. Preferably, the means for providing external pressure to the portion of the marine pipe 600 encased within the outer pipe assembly 500 may be by injection of hydraulic oil or water.
According to a preferred embodiment, the outer tube assembly 500 may include a flexible outer tube 510 and/or a flexible pipe joint 520. The two ends of the flexible outer tube 510 may each be connected by a flexible pipe joint 520. One end of the flexible pipe joint 520 may be sleeved outside the flexible outer pipe 510. The flexible outer tube 510 and the flexible pipe joint 520 bend with the marine pipe 600 while the marine pipe 600 can be bent. The flexible outer tube 510 may be slidably displaced relative to the flexible tube joint 520 while being bent. The flange 730 may include a plate 731 and/or a seal interface 732. The plate 731 and the sealing interface 732 may be integrally connected to each other. The flange 730 may include a socket hole 733. The receiving hole 733 may penetrate the plate 731 and the sealing interface 732 so that the flange 730 can be received on the marine pipe 600 through the receiving hole 733. The sleeving hole 733 and the marine pipe 600 can be in clearance fit so as to reduce the resistance which is applied to the marine pipe 600 by the sleeving hole 733 of the flange 730 and influences the deformation of the marine pipe 600 in the process that the marine pipe 600 undergoes the tension and compression test. The flexible pipe joint 520 may be sleeved outside the marine pipe 600. The sealing interface 732 may plug in the space between the flexible pipe joint 520 and the marine pipe 600 to form a first closed space between the marine pipe 600 and the outer pipe assembly 500 that can apply external pressure on the outside of the marine pipe 600. Preferably, at least one first sealing ring 710 may be disposed between the flange 730 and the marine pipe 600 to achieve a dynamic seal therebetween. At least a second sealing ring may be disposed between the flange 730 and the flexible pipe joint 520 to provide a static seal therebetween. At least one third sealing ring may be provided between the end cap 800 and the marine pipe to achieve a static seal therebetween. Referring to fig. 3 and 6, the end cap 800 may be provided with a groove for mounting a third seal ring. Preferably, the number of first, second and/or third sealing rings of the present invention may be one, two, three, four, five or more, for example. The plurality of seal rings may be spaced apart from each other. The invention can at least realize the following beneficial technical effects by adopting the mode: firstly, the flexible outer tube 510 and the flexible pipe joint 520 bend along with the marine pipe 600 when the marine pipe 600 is bent, so that the marine pipe 600 has a larger bending space in the process of being tested; secondly, the sleeving hole 733 of the invention is in clearance fit or loose fit with the marine pipe 600, so that the resistance which is applied to the marine pipe 600 by the sleeving hole 733 of the flange 730 and influences the deformation of the marine pipe 600 in the process that the marine pipe 600 undergoes the tension and compression test is reduced.
According to a preferred embodiment, the flexible pipe joint 520 may be a non-bonded flexible pipe joint. The present invention may be used with existing mature flexible pipe joint constructions. Both ends of the flexible outer tube 510 are connected to flexible tube joints 520. The flexible outer pipe and the flexible pipe joint have been widely used in ocean engineering, and the connection manner of the flexible outer pipe 510 and the flexible pipe joint 520 is the prior art or the known technology. For example, the flexible pipe joint 520 may preferably be a non-bonded flexible pipe joint according to the code API spec.17j and/or API RP 17B. Preferably, for the structure and connection mode of the existing flexible pipe joint, see Lixiangyun ocean non-bonded flexible pipe joint structure design and analytical research [ D ]. Dalian university of graduates, 2014, and/or maoqingka ocean flexible pipe joint design Key problem research [ D ]. Dalian university of graduates, 2013, the entire contents of which are incorporated herein by reference for brevity. It should be noted that the cross-sectional views of the flexible pipe joint 520 of fig. 2 and 3 of the present invention are only schematic, not actual structures, but only the relative positions and connection relationships of the surface flexible pipe joint 520 and the flexible outer pipe 510. Preferably, the flexible pipe joint 520 may be a flexible pipe joint from Technip, wellstream, and/or NKT corporation. According to a preferred embodiment, the apparatus may include a tension and compression test assembly 200. The tension and compression testing assembly 200 may include at least one of a first mount 210, a second mount 220, a tension cylinder 230, and a fixing rod 240. The extension hydraulic cylinder 230 may include a third cylinder 231 and/or a third piston rod 232. The first fixing frame 210 may be bolted or screwed to a flange 730 at one end of the marine pipe 600. One of the third cylinder 231 and the third piston rod 232 may be connected to a hermetic end cap 800 at one end of the marine pipe 600. The other of the third cylinder 231 and the third piston rod 232 may be coupled to the first mount 210. The second fixing frame 220 may be coupled to a flange 730 at the other end of the marine pipe 600 by bolts or screws. One end of the securing rod 240 may be attached to a sealing end cap 800 at the other end of the marine pipe 600. The other end of the fixing rod 240 may be connected to the second fixing frame 220. The first fixing frame 210 and the second fixing frame 220 can rotate synchronously with the flange 730 connected with the first fixing frame and the second fixing frame. Therefore, the device can perform the tensile and compression test while performing the bending test on the marine pipe 600. The invention can at least realize the following beneficial technical effects by adopting the mode: first mount 210 and second mount 220 are installed respectively on the ring flange at the both ends of marine pipe, let first mount 210 and second mount 220 can rotate along with the ring flange 730 that is connected with it in step, at this moment, tensile pneumatic cylinder 230 still satisfies the operating condition, when needs, can carry out simultaneously and draw pressure test and vibration test.
According to a preferred embodiment, the apparatus may include a vibration testing assembly 400. The vibration testing assembly 400 may include at least one of a pipe clamp 410, a vibration cylinder 420, and a vibration mount 430. The vibration cylinder 420 may include a fourth cylinder 421 and/or a fourth piston rod 422. One of the fourth cylinder 421 and the fourth piston rod 422 may be connected to the vibration base 430. The other of the fourth cylinder 421 and the fourth piston rod 422 may be connected to the pipe clamp 410 by a bolt. The pipe clamp 410 may include a rubber pad 411 and/or two semicircular pipe clamps 412. The two tube clips 412 may be bolted to encircle the flexible outer tube 510. A rubber pad 411 may be padded between the tube clamp 412 and the flexible outer tube 510. The vibration mount 430 may be configured to move relative to the test rack 100 at least as the flexible outer tube 510 bends so that the vibration mount 430 is always directly under the tube clamp 410. So that the device applies a vertical vibration load to the marine pipe 600 by repeated extension and contraction of the vibration cylinder 420. Preferably, referring to fig. 7, at least three or at least four moving wheels 431 for supporting the vibration base 430 may be provided on the vibration base 430. Particularly preferably, the moving wheel 431 may be a universal wheel. Preferably, the vibration test is not a unique name, and in some cases, the vibration test may also be referred to as a fatigue test. The fatigue test is realized by vibrating the vibration hydraulic cylinder for a long time at a certain frequency. The invention can at least realize the following beneficial technical effects by adopting the mode: firstly, the vibration base 430 of the present invention is configured to move relative to the test support 100 at least along with the bending of the flexible outer tube 510, so that the vibration base 430 of the present invention is always positioned right below the pipe clamp 410, and thus the device can apply a vertical vibration load to the marine pipe 600 through the repeated extension of the vibration hydraulic cylinder 420 to perform a vibration test while performing a bending test on the marine pipe 600; second, the structure of the present invention enables the apparatus to perform at least one of an internal pressure test, an external pressure test, a bending test, a tension and compression test, and a vibration test on the marine pipe at one time. That is, the apparatus can perform one of the internal pressure test, the external pressure test, the bending test, the tension and compression test and the vibration test alone, or simultaneously perform a combination test of any two of the internal pressure test, the external pressure test, the bending test, the tension and compression test and the vibration test, a combination test of any three of the tests, a combination test of any four of the tests, or a combination test of five of the tests, which cannot be achieved by the conventional product. The invention is not a simple combination of various experimental devices simply arranged on the same frame body. If the experimental devices for performing the internal pressure test, the external pressure test, the bending test, the tension and compression test and the vibration test on the marine pipe are only arranged on the same test support 100, the defects that the space occupation is large and the test loads are difficult to be applied together exist between the experimental structures. The invention skillfully integrates the internal pressure test, the external pressure test, the tension and compression test and the bending test into a whole through the combination of the flange plate and the flexible outer pipe assembly, and the flexible outer pipe assembly can apply the external force of the bending test and the external force of the vibration test to the marine pipe from the outside without arranging a structure for applying the bending test and the vibration test between the marine pipe and the outer pipe which is coated outside the marine pipe and is used for applying the external pressure to the marine pipe, so that the equipment can be more miniaturized. And the structures to which the bending test and the vibration test are applied can also be in the macroscopic region, and if the devices fail and do not work, the structures can be directly observed from the outside for treatment, so that the structures to which the bending test and the vibration test are applied are prevented from being integrated in the pipe and the corresponding structures cannot be observed whether the corresponding structures have problems or not. The flange plate is used as a connecting part for mounting the marine pipe and the flexible outer pipe to the test bracket, and the connecting structure of the flange plate and the marine pipe also allows the marine pipe to longitudinally deform relative to the marine pipe so as to carry out tension and compression tests. According to a preferred embodiment, the pivot assembly 700 may include a flange clamp 740. The flange clamp 740 may include a first mount 741, a second mount 742, and/or a removable clamp 743. First mount 741 and/or second mount 742 may be affixed to test fixture 100. The first mount 741 may be disposed directly below the second mount 742. The first mounting seat 741 may have an integral pivot hole. The removable clamp 743 can be removably attached to the second mount 742 by a bolt to collectively form a pivot hole. Two pivot shafts may be provided on the flange 730. The flange 730 may be pivotally connected to the test stand 100 by engaging the pivot shaft with the pivot hole. The invention can at least realize the following beneficial technical effects by adopting the mode: firstly, under the action of gravity, the first mounting seat positioned below can bear larger external force relative to the second mounting seat, so that the first mounting seat 740 positioned below is provided with an integral pivot hole, the structure is not easy to damage and is more reliable; second, the second mounting seat 742 located above the first mounting seat 741 and the detachable clamping seat 743 are detachably connected by bolts to form a pivot hole together, so as to facilitate the dismounting of the flange 730.
Preferably, in the present invention, the fastening may refer to a fixed connection manner constituted by a permanent connection or a detachable connection. For example, securing may refer to at least one of screwing, welding, bonding, riveting, and snapping.
According to a preferred embodiment, at least a portion of the marine pipe 600 that is to be tested or experimented with may be placed inside the flexible outer pipe 510. The flexible outer tube 510 may be secured by a flexible tube joint 520. The flexible pipe joint 520 and the flange 730 can be fixed by bolts. The pivot assembly 700 may include at least one of a first seal 710, a second seal 720, and a flange 730. The flange 730 may be sealed to the marine pipe 600 by providing at least one first sealing ring 710. Sealing between the flexible pipe joint 520 and the flange 730 may be achieved by providing at least one second sealing ring 720. Both ends of the marine pipe 600 may be internally threaded. The end cap 800 may be provided with external threads that mate with internal threads on both ends of the marine pipe 600. Thus, the end cap 800 and the marine pipe 600 may be threadably connected. A third sealing ring 810 may be provided on the end cap 800. A third seal ring 810 may be located between the seal end cap 800 and the marine pipe 600 for sealing therebetween.
According to a preferred embodiment, the marine pipe 600 may be removably sleeved within the flange 730 and/or the flexible outer pipe 510. The tension and compression testing assembly 200 may include a first mount 210, a second mount 220, a tension cylinder 230, and/or a fixing rod 240. The first fixing frame 210 may be coupled to a flange 730 at one end of the marine pipe 600 by bolts or screws. The extension hydraulic cylinder 230 may include a third cylinder 231 and/or a third piston rod 232. One of the third cylinder 231 and the third piston rod 232 may be connected to the sealing end cap 800. The other of the third cylinder 231 and the third piston rod 232 may be connected to the first mount 210. Therefore, the device can compress or stretch the marine pipe 600 by the stretching hydraulic cylinder 230 arranged between the first fixing frame 210 and the sealing end cover 800 to perform the tension-compression test.
According to a preferred embodiment, the vibration testing assembly 400 may include a pipe clamp 410 and/or a vibration cylinder 420. The vibration cylinder 420 may include a fourth cylinder 421 and/or a fourth piston rod 422. One of the fourth cylinder 421 and the fourth piston rod 422 may be fixed relative to the test support 100. The other of the fourth cylinder 421 and the fourth piston rod 422 may be connected to the pipe clamp 410 by a bolt. The pipe clamp 410 may include a rubber pad 411 and/or two semicircular pipe clamps 412. The two tube clips 412 may be bolted to encircle the flexible outer tube 510. A rubber pad 411 may be padded between the tube clamp 412 and the flexible outer tube 510.
According to a preferred embodiment, the device may be pressurized within the marine pipe 600. The device may also be pressurized within flexible outer tube 510. Therefore, the pressure resistance test of the marine pipe is realized by pressurizing the inside and the outside of the marine pipe. The pressure resistance test may include an internal pressure test and an external pressure test. The internal pressure test may be a test for detecting at least one of a sealing property and a mechanical property of the marine pipe by inputting a pressurizing medium into the marine pipe 600 to make the pressure reach a first preset pressure. The external pressure test may be a test for detecting at least one of a sealing property and a mechanical property of the marine pipe by inputting a pressurizing medium into the flexible outer pipe 510 to make the pressure reach a second preset pressure. The first predetermined pressure may be equal to the second predetermined pressure, or the first predetermined pressure may be different from the second predetermined pressure, according to different testing requirements. The bending test can be a test in which the two flanges are rotated back and forth within a specific angle range so that the marine pipe is repeatedly bent to test the bending performance of the marine pipe. The tension and compression test may be a test for testing the mechanical properties of the marine pipe by applying a tensile or compressive force to the marine pipe.
According to a preferred embodiment, the invention focuses mainly on structural improvements to the device itself. The determination of the mounting positions and mounting methods of various strain gauge sensors according to experimental requirements is well known in the art, and the invention is not described in a complicated manner.
Example 2
The embodiment discloses a multifunctional mechanical property test method for an ocean pipe based on a flexible riser, or a method for mechanical property test of the ocean pipe, or a mechanical property test method, or a method for testing the mechanical property of a pipeline, and the names can be replaced with each other equivalently. The preferred embodiments of the present invention are described in whole and/or in part in the context of other embodiments, which can supplement the present embodiment, without resulting in conflict or inconsistency.
According to a preferred embodiment, the method can be used to perform mechanical tests on marine pipe 600 as a test sample using the apparatus of the present invention. The mechanical property test may include: at least one of an internal pressure test, an external pressure test, a bending test, a tension and compression test, and a vibration test. The device can independently carry out one of an internal pressure test, an external pressure test, a bending test, a tension and compression test and a vibration test on the marine pipe 600. Alternatively, the device can simultaneously perform a combination test of any two tests, a combination test of any three tests, a combination test of any four tests and/or a combination test of five tests on the marine pipe 600, wherein the two tests are selected from an internal pressure test, an external pressure test, a bending test, a tension-compression test and a vibration test.
It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a multi-functional mechanical properties test device of marine pipe based on flexible riser which characterized in that, the device includes:
an outer tube assembly (500), the outer tube assembly (500) for hermetically encasing at least a portion of the marine tube (600) therein to form a first enclosed space between the marine tube (600) and the outer tube assembly (500) that can apply external pressure outside of the marine tube (600);
a sealing end cap (800) for sealing both ends of the marine pipe (600) to form a second closed space capable of applying an internal pressure inside the marine pipe (600);
the pivoting assembly (700) comprises flanges (730), two ends of the marine pipe (600) are respectively sleeved with one flange (730) and are pivoted to the test support (100) through the flanges (730); and
the bending test assembly (300) is connected to the flanges (730) at two ends of the marine pipe (600) and can test the bending performance of the marine pipe (600) in a mode of bending the marine pipe (600) by repeatedly changing the length of a part of the bending test assembly between the two flanges (730) so as to enable the two flanges (730) to rotate back and forth within a specific angle range;
wherein the outer tube assembly (500) is flexible to bend with the marine tube (600) while the marine tube (600) is bent;
the outer pipe assembly (500) comprises a flexible outer pipe (510) and a flexible pipe joint (520), two ends of the flexible outer pipe (510) are connected through one flexible pipe joint (520), one end of the flexible pipe joint (520) is sleeved outside the flexible outer pipe (510), the flexible outer pipe (510) and the flexible pipe joint (520) bend along with the marine pipe (600) when the marine pipe (600) is bent, the flexible outer pipe (510) can slide relative to the flexible pipe joint (520) when being bent, the flange (730) comprises a disc body (731) and a sealing interface (732), the disc body (731) and the sealing interface (732) are connected with each other to form a whole, the flange (730) further comprises a sleeving hole (733), and the sleeving hole (733) penetrates through the disc body (731) and the sealing interface (732) to enable the flange (730) to be sleeved on the marine pipe (600) through the sleeving hole (733), the sleeve hole (733) and the marine pipe (600) are in clearance fit or loose fit.
2. The apparatus of claim 1, wherein the bending test assembly (300) comprises a first bending hydraulic cylinder (310), a second bending hydraulic cylinder (320), a first cable (330), and a second cable (340), wherein a first cylinder (311) of the first bending hydraulic cylinder (310) is pivotally connected to a flange (730) at one end of the marine pipe (600), a first piston rod (312) of the first bending hydraulic cylinder (310) is flexibly connected to the flange (730) at the other end of the marine pipe (600) by the first cable (330), a second cylinder (321) of the second bending hydraulic cylinder (320) is pivotally connected to the flange (730) at one end of the marine pipe (600), and a second piston rod (322) of the second bending hydraulic cylinder (320) is flexibly connected to the flange (730) at the other end of the marine pipe (600) by the second cable (340), and the first bending hydraulic cylinder (310) and the first rope (330) are positioned on one side of the marine pipe (600), and the second bending hydraulic cylinder (320) and the second rope (340) are positioned on the other side of the marine pipe (600), wherein the first bending hydraulic cylinder (310) and the second bending hydraulic cylinder (320) repeatedly act in opposite directions to each other to enable the two flanges (730) to rotate back and forth within a specific angle range by repeatedly changing the length of a part of the bending test assembly (300) positioned between the two flanges (730) so as to test the bending performance of the marine pipe (600).
3. The device according to claim 2, wherein the first bending hydraulic cylinder (310) and the second bending hydraulic cylinder (320) repeatedly move in opposite directions to each other, and the first bending hydraulic cylinder (310) and the second bending hydraulic cylinder (320) repeatedly extend and contract in opposite directions during the bending test of the marine pipe (600).
4. The device of claim 3, wherein the flexible pipe joint (520) is a non-bonded flexible pipe joint.
5. The device according to claim 4, characterized in that the device comprises a tension and compression test assembly (200), the tension and compression test assembly (200) comprises a first fixing frame (210), a second fixing frame (220), a tension hydraulic cylinder (230) and a fixing rod (240), the tension hydraulic cylinder (230) comprises a third cylinder body (231) and a third piston rod (232), the first fixing frame (210) is connected on a flange plate (730) at one end of the marine pipe (600) through bolts or threads, one of the third cylinder body (231) and the third piston rod (232) is connected on a sealing end cover (800) at one end of the marine pipe (600), the other of the third cylinder body (231) and the third piston rod (232) is connected on the first fixing frame (210), the second fixing frame (220) is connected on the flange plate (730) at the other end of the marine pipe (600) through bolts or threads, one end of the fixed rod (240) is connected to the sealing end cover (800) at the other end of the marine pipe (600), the other end of the fixed rod (240) is connected to the second fixing frame (220), and the first fixing frame (210) and the second fixing frame (220) synchronously rotate along with the flange plate (730) connected with the first fixing frame and the second fixing frame.
6. The apparatus of claim 5, further comprising a vibration testing assembly (400), the vibration testing assembly (400) comprising a pipe clamp (410), a vibration hydraulic cylinder (420) and a vibration base (430), the vibration hydraulic cylinder (420) comprising a fourth cylinder (421) and a fourth piston rod (422), one of the fourth cylinder (421) and the fourth piston rod (422) being connected to the vibration base (430), the other of the fourth cylinder (421) and the fourth piston rod (422) being bolted to the pipe clamp (410), the pipe clamp (410) comprising a rubber pad (411) and two semicircular pipe clamps (412), the two pipe clamps (412) being bolted to embrace the flexible outer pipe (510), the rubber pad (411) being padded between the pipe clamps (412) and the flexible outer pipe (510), the vibration base (430) being configured to move relative to the test frame (100) at least with bending of the flexible outer pipe (510) to allow the vibration base to vibrate The seat (430) is always directly below the pipe clamp (410), so that the device applies a vertical vibratory load to the marine pipe (600) through repeated extension and retraction of the vibratory hydraulic cylinder (420).
7. The apparatus of claim 6, wherein the vibration base (430) is provided with at least three moving wheels (431) for supporting the vibration base (430).
8. The apparatus of claim 7, wherein the mechanical property test comprises: the device can be used for carrying out one test of an internal pressure test, an external pressure test, a bending test, a tension and compression test and a vibration test on the marine pipe (600) independently or simultaneously carrying out a combined test of any two tests, a combined test of any three tests, a combined test of any four tests or a combined test of five tests on the marine pipe (600).
9. A method for testing the multifunctional mechanical properties of a marine pipe based on a flexible riser, characterized in that the method is used for testing the mechanical properties of a marine pipe (600) as a test sample using the device according to any one of claims 1 to 8.
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| JP7227541B2 (en) * | 2019-10-08 | 2023-02-22 | 日本電信電話株式会社 | Vibration reproducer |
| CN111473971B (en) * | 2020-06-19 | 2020-10-13 | 胜利油田新大管业科技发展有限责任公司 | External pressure test device for pipeline |
| CN112577826B (en) * | 2020-12-02 | 2022-12-23 | 天津大学 | Test platform for simulating uniform load of pipeline in deepwater environment |
| CN112748006B (en) * | 2020-12-25 | 2022-11-18 | 广东科朗管网技术有限公司 | Plastic pressure pipeline performance testing device and testing method thereof |
| CN113237618B (en) * | 2021-04-08 | 2023-01-17 | 天津大学 | Underwater shell modal test method considering internal flow field and pressure influence thereof |
| CN113237617B (en) * | 2021-04-08 | 2023-01-17 | 天津大学 | Underwater shell modal test device considering internal flow field and pressure influence thereof |
| CN113281187A (en) * | 2021-06-25 | 2021-08-20 | 临海伟星新型建材有限公司 | Pipe pressure resistance testing device and testing method thereof |
| CN113466057B (en) * | 2021-07-19 | 2024-06-11 | 中国飞机强度研究所 | Composite loading mechanism for steel pipe large-deformation bending test |
| CN113758958B (en) * | 2021-08-10 | 2023-10-27 | 上海航天精密机械研究所 | Torsion ablation test device for flexible heat-resistant structure and application method thereof |
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