CN204649454U - Seabed pipe CYCLIC LOADING control and measuring system - Google Patents
Seabed pipe CYCLIC LOADING control and measuring system Download PDFInfo
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- CN204649454U CN204649454U CN201520356521.0U CN201520356521U CN204649454U CN 204649454 U CN204649454 U CN 204649454U CN 201520356521 U CN201520356521 U CN 201520356521U CN 204649454 U CN204649454 U CN 204649454U
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Abstract
The utility model discloses a kind of seabed pipe CYCLIC LOADING control and measuring system, comprise test flume, power transmission, data collector, vertical deflection device and experiment accessory; Described experiment accessory comprises the different lengths of steel pipes of many diameters and iron sand; A described lengths of steel pipes is banketed as tested pipeline section and is buried or be directly placed in described test flume, and described tested pipeline section is arranged along the Width of described test flume; Above described tested pipeline section, be provided with described vertical deflection device, described vertical deflection device is connected with described power transmission; Described data acquisition system (DAS) comprises pull pressure sensor, depth transducer or clock gauge, sound state strain acquirement instrument, a computing machine and a camera.The utility model can simulated sea bottom pipeline occurred level to Large travel range to-and-fro movement time, pipeline movement locus and be subject to mutual relationship between foundation soil body constraining force.
Description
Technical field
The utility model relates to the design field of a kind of subsea pipeline stability in operation process, particularly a kind of seabed pipe CYCLIC LOADING control and measuring system.
Background technology
The annual petroleum demand of China is more than 400,000,000 tons, but we are fertile every year but only has about 1.9 hundred million tons, and the dependence for imported crude oil is very serious.But abundant hydrocarbon resources is rich in China surrounding sea areas, but not yet develops, in order to reduce the degree of dependence to imported crude oil further, need the exploitation of Efforts To Develop Marine oil and gas resource.
Pipeline transportation all plays an important role in the overall process of the production of crude oil, rock gas, refining, storage and use.The solidification impact produced in order to avoid wax fractionation in transportation reduces transport difficulty, the transport of sea-bottom oil-gas needs to carry out under the synergy of temperature and pressure usually, due to the effect of the temperature difference and pressure reduction, larger extra-stress can be produced in tube wall, owing to being subject to the constraint of the foundation of sea floor soil body, the Free Transform of pipeline is restricted, the extra-stress in tube wall is caused constantly to accumulate the generation finally causing complete buckling, thus the stability of pipeline is threatened, in order to study the stability problem of pipeline, many scholars have carried out studying targetedly to relevant issues, the interaction model of representative pipeline and the soil body is proposed, but these pipe-soil interaction models for just pipeline generation thin tail sheep situation, resistance of soil and pipeline level are to the mutual relationship between displacement, the maximum horizontal of pipeline is often no more than twice caliber to displacement.In a practical situation, the level of pipeline can reach 5 to 20 times of calibers to displacement.Now thin tail sheep pipe-soil interaction model is just no longer applicable, meanwhile, the switching process of carrying out hundreds of times is needed in the military service process of subsea pipeline, due to the change of the temperature difference and pressure reduction, pipeline can move back and forth in the horizontal direction, must consider these problems in the stability Design of subsea pipeline.Therefore pipeline level is of great significance to the reciprocating research of Large travel range with regard to tool.
Summary of the invention
The utility model provides a kind of seabed pipe CYCLIC LOADING control and measuring system for solving in known technology the technical matters that exists, this system can simulated sea bottom pipeline occurred level to Large travel range to-and-fro movement time, pipeline movement locus and be subject to mutual relationship between foundation soil body constraining force.
The technical scheme that the utility model is taked for the technical matters existed in solution known technology is: a kind of seabed pipe CYCLIC LOADING control and measuring system, comprises test flume, power transmission, data collector, vertical deflection device and experiment accessory, described experiment accessory comprises the different lengths of steel pipes of many diameters and iron sand, the length of described lengths of steel pipes is less than the lumen width of described test flume, plug is provided with at the two ends of described lengths of steel pipes, the sidewall of described lengths of steel pipes is provided with back-up sand mouth, described back-up sand mouth is provided with door leaf, described door leaf is connected by the outer wall of hinge with described lengths of steel pipes, is formed with the chamber holding described iron sand in described lengths of steel pipes, during test, a described lengths of steel pipes is banketed as tested pipeline section and is buried or be directly placed in described test flume, and described tested pipeline section is arranged along the Width of described test flume, described vertical deflection device is provided with above described tested pipeline section, described vertical deflection device comprises the web joint be fixed in above described tested pipeline section, a perpendicular vertical guide is respectively provided with in four bights of described web joint, described vertical guide is provided with slider I, described slider I and force transmitting board affixed, a slide block II affixed with it is each side provided with in the below of described force transmitting board, described slide block II is assemblied on horizontal longitudinal rail, described horizontal longitudinal rail is fixed on the end face of described test flume along the length direction of described test flume, depth transducer or clock gauge is connected with between described force transmitting board and described web joint, described web joint is provided with middle part loss of weight elongated hole, described force transmitting board is connected with described power transmission, described power transmission comprises gusset and leading screw, described leading screw is supported on the end face of described test flume by support, described gusset is connected with nut, described nut is threaded connection on described leading screw, described leading screw is driven by servomotor speed reduction unit, and described servomotor speed reduction unit is controlled by controller, described gusset is connected on described horizontal longitudinal rail by slide block III, and described gusset is connected by pull pressure sensor with described force transmitting board, described data acquisition system (DAS) comprises described pull pressure sensor, described depth transducer or described clock gauge, sound state strain acquirement instrument, a computing machine and a camera, described pull pressure sensor is connected with described sound state strain acquirement instrument respectively with described depth transducer or described clock gauge, and described sound state strain acquirement instrument is connected with described computing machine respectively with described camera, described camera to be fixed on support bar and to obtain the image of the anterior soil body of described tested pipeline section direction of motion, and described support bar is fixed on described force transmitting board.
The surrounding of described test flume is sealing, and the sidewall of described test flume adopts tempered glass to make, and the sidewall of described test flume is provided with the scale arranged along short transverse.
Described plug is formed by shut.
The advantage that the utility model has and good effect are: by being fixed on below vertical deflection device by tested pipeline section, and adopt screw-nut body to drive vertical deflection device, enable tested pipeline section simulated sea bottom pipeline level to Large travel range to-and-fro movement, and then pipeline movement locus and be subject to the mensuration of mutual relationship between foundation soil body constraining force when completing this motion.Tested pipeline section is connected with vertical deflection device with power transmission by the utility model, by with the cooperatively interacting of data collector and correlation test accessory, effectively can simulate the level of pipeline section in the soil body to iterative motion process.By changing test condition, the rate travel of tested pipeline section external diameter of can analyzing and researching, unit length pipeline section weight, pipeline section horizontal direction, the initial buried depth of pipeline section, the distance of pipeline section one-way movement, the number of times of pipeline section iterative motion and physical properties of soil are for the situation of change of horizontal resist forces suffered by pipeline section movement locus and pipeline section.Can move up and down in the process that wherein vertical deflection device makes tested pipeline section move flat at water, simulate the real motion track of subsea pipeline as much as possible.The size that not only can be arranged the move distance of tested pipeline section by power transmission also can guarantee that tested pipeline section movement rate changes according to testing requirements, can constant speed move also can in process of the test Shift speed segmentally motion, greatly increase the controllability of test, can refinement analysis and research process.Meanwhile, steel web joint, leading screw and horizontal longitudinal rail can guarantee that whole actuating system moves along horizontal direction, can the stability of warranty test process, the reliability of strengthen test data.
In process of the test, data acquisition system (DAS) records each moment tested pipeline section level to displacement, vertically to displacement and the level that is subject to the situation of change of drag, and the data situation in each moment is presented in face of test operation personnel in time and intuitively by computing machine, timely Adjustment Tests process can be facilitated.Meanwhile, camera has recorded the forming process of the mechanism of tested pipeline section and foundation soil body and the anterior earth dam of tested pipeline section direction of motion, can be used in studying the motion conditions of soil resistance and tested pipeline section under different tests condition.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is vertical deflection apparatus structure schematic diagram of the present utility model;
Fig. 4 is lengths of steel pipes schematic diagram of the present utility model;
The Different Weight pipeline that Fig. 5 adopts the utility model to measure is without drag displacement curve figure during initial buried depth;
The Different Weight pipeline that Fig. 6 adopts the utility model to measure is without path curves figure during initial buried depth.
In figure: 1, servomotor speed reduction unit; 2, support; 3, pull pressure sensor; 4, gusset; 5, vertical guide; 6, force transmitting board; 7, web joint; 8, leading screw; 9, horizontal longitudinal rail; 10, controller; 11, camera; 12, computing machine; 13, sound state strain acquirement instrument; 14, test flume; 15, tested pipeline section; 16, door leaf; 17, hinge; 18, slider I; 19, slide block II; 20, slide block III.
Embodiment
For summary of the invention of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 ~ Fig. 4, a kind of seabed pipe CYCLIC LOADING control and measuring system, comprise test flume 14, power transmission, data collector, vertical deflection device and test accessory.
Described test accessory comprises the different lengths of steel pipes of many diameters and iron sand, the length of described lengths of steel pipes is less than the lumen width of described test flume 14, plug is provided with at the two ends of described lengths of steel pipes, the upper portion side wall of described lengths of steel pipes is provided with back-up sand mouth, described back-up sand mouth is provided with door leaf 16, described door leaf 16 is connected with the outer wall of described lengths of steel pipes by hinge 17, is formed with the chamber holding described iron sand in described lengths of steel pipes.
Iron sand is used to increase lengths of steel pipes weight.In the present embodiment, the length of lengths of steel pipes is 1m, arranging one on lengths of steel pipes top can the door leaf of free switch, the interpolation of iron sand in process of the test can be facilitated, thus reduce the difficulty of test operation, reducing the test time used, by adding the interior in a big way change that iron sand can make the weight of lengths of steel pipes from hollow weight to complete solid weight, being conducive to the tested pipeline section motion conditions simulating various weight.Tested pipeline section adopts caliber different and the hollow steel pipe of both sides sealing, and tested pipeline section top is opened back-up sand mouth and is convenient to add iron sand in process of the test, to study the size of soil body resistance suffered by different tube diameters, different deadweight and the tested pipeline section of different curvature; The plug at tested pipeline section two ends does not contact with test flume both sides inwall, has both eliminated the end effect of tested tube section ends to front earth dam, also decreases the friction of tested pipeline section two ends and test flume inwall substantially, can reduce test error.
During test, a described lengths of steel pipes is banketed as tested pipeline section 15 and is buried or be directly placed in described test flume 14, and described tested pipeline section 15 is arranged along the Width of described test flume 14.
Described vertical deflection device is provided with above described tested pipeline section 15, described vertical deflection device comprises the web joint 7 be fixed in above described tested pipeline section 15, a perpendicular vertical guide 5 is respectively provided with in four bights of described web joint 7, described vertical guide 5 is provided with slider I 18, described slider I 18 is affixed with force transmitting board 6, a slide block II 19 affixed with it is each side provided with in the below of described force transmitting board 6, described slide block II 19 is assemblied on horizontal longitudinal rail 9, described horizontal longitudinal rail 9 is fixed on the end face of described test flume 14 along the length direction of described test flume 14, depth transducer or clock gauge (not shown) is connected with between described force transmitting board 6 and described web joint 7, described web joint 7 is provided with middle part loss of weight elongated hole.Middle part loss of weight elongated hole the weight that can alleviate vertical deflection device is on the one hand set, and then reduce the impact on the vertical degree of freedom of tested pipeline section 15, the interpolation of iron sand can be facilitated on the one hand.
Described force transmitting board 6 is connected with described power transmission, described power transmission comprises gusset 4 and leading screw 8, described leading screw 8 is supported on the end face of described test flume 14 by support 2, described gusset 4 is connected with nut, described nut is threaded connection on described leading screw 8, described leading screw 8 is driven by servomotor speed reduction unit 1, and described servomotor speed reduction unit 1 is controlled by controller 10; Described gusset 4 is connected on described horizontal longitudinal rail 9 by slide block III 20, and described gusset 4 is connected by pull pressure sensor 3 with described force transmitting board 6.
Above-mentioned power transmission controls the output speed of servomotor speed reduction unit 1 by controller 10, servomotor speed reduction unit 1 drives gusset 4 by feed screw nut, gusset 4 drives force transmitting board 6, and then drive vertical deflection device and tested pipeline section 15, tested pipeline section 15 is advanced to speed according to certain level.
Described data acquisition system (DAS) comprises described pull pressure sensor 3, described depth transducer or described clock gauge, a sound state strain acquirement instrument 13, computing machine 12 and a camera 11, described pull pressure sensor 4 is connected with described sound state strain acquirement instrument 13 respectively with described depth transducer or described clock gauge, and described sound state strain acquirement instrument 13 is connected with described computing machine 12 respectively with described camera 11; Described camera 11 to be fixed on support bar and to obtain the image of the anterior soil body of described tested pipeline section 15 direction of motion, and described support bar is fixed on described force transmitting board 6.
The destruction situation of the anterior soil body of pipeline direction of motion of camera 11 acquisition and recordings is presented on the computer 12 by data line.Meanwhile, the vertical displacement of pipeline is measured by described depth transducer or described clock gauge, then be delivered on sound state strain acquirement instrument 13 by data line, the data on sound state strain acquirement instrument 13 are delivered on computing machine 12 by data line, show concrete data plot simultaneously.Described pull pressure sensor 3 detects that level that tested pipeline section 15 is subject to is to the size of resistance of soil, passes to sound state strain acquirement instrument 13 by data line, passes to computing machine 12 subsequently, and show drag change curve timely in time.Above-mentioned data acquisition system (DAS) can according to different testing requirements record pipeline levels to the trail change in motion process, the size variation situation of suffered level to drag and the damaged deformation situation of the anterior soil body of pipeline direction of motion.
The utility model reduces the additional drag that tested pipeline section is subject at vertical direction as much as possible, thus reduce actual pipeline at vertical direction without restrained condition.And the utility model can simulate the iterative motion of pipeline.
Adopt the utility model by the iterative motion of shop experiment analysis and research pipeline in the soil body, under can simulating different tests condition, subsea pipeline level is to the movement locus in motion process, the change of the foundation soil drag in pipeline motion process of simultaneously analyzing and researching, the difference of further analysis cycle to-and-fro movement and single one-way movement, the failure mode of analytical soil sample, research pipeline embedded depth, soil body physico-mechanical properties, pipeline is conducted oneself with dignity, the outer dia of pipeline and pipeline movement rate, the many factors such as curvature are on the impact of resistance of soil, for level proposes strong data to the foundation of Large travel range pipe-soil interaction model, and then the mutual relationship analyzed between pipeline movement locus and suffered resistance of soil, set up more careful pipeline interaction model, stability Design for pipeline provides more careful foundation.
In the present embodiment, test flume 14 is respectively the steel tank of 3m, 1.1m, 1m for length, conveniently carries out observation analysis to process of the test, and its surrounding has settled tempered glass and short transverse indicates scale on its edge.And the surrounding of described test flume is sealing, can add water, the underwater operation state of simulated sea bottom pipeline.Described plug is formed by shut.
Before adopting the utility model to carry out on-test, first measure the physico mechanical characteristic banketed, when banketing as cohesiveless soil, the mechanics index of physics that need measure is soil body unit weight, water percentage, packing and natural slop angle.According to the packing preset, the soil body is loaded in test flume, according to the result of calculation of finite element, the Plastic flow of soil region that tested pipeline section transverse movement produces is less than 1 times of caliber at depth direction, and therefore the bottom soil body thickness of tested pipeline section should be greater than 1 times of caliber, then lays test section, tested pipeline section is buried underground according to different testing requirementss, tested pipeline section can be lowered in the soil body at own wt, also can set buried depth artificially, to be buried in described test flume by tested pipeline section with banketing.When banketing as cohesive soil, the mechanics index of physics that need measure is soil body unit weight, water percentage, plastic limit, liquid limit and shearing strength, according to the water percentage preset and unit weight, the soil body is loaded in test flume, and bottom soil body thickness is greater than 1 times of caliber, the same with cohesiveless soil, bury tested pipeline section underground according to different testing requirementss, tested pipeline section can be lowered in the soil body at own wt, also can be artificial bury underground according to predetermined depth.If the impact of the tested pipeline section weight of Water demand, after above step completes, the door leaf on tested pipeline section can be opened, add iron sand, to reach default weight by the middle part loss of weight elongated hole on web joint.
After on-test, start-up simulation machine, camera, dynamic statical strain indicator successively.First dynamic statical strain indicator is balanced, reset, then setting test rate of loading and the move distance of pipeline horizontal direction and the shuttling movement number of times of pipeline, start servomotor speed reduction unit, loading speed can be able to change between 1 ~ 10mm/s, and level is determined to the maximal value of displacement by the length scale of test flume.After pipeline setting in motion, the displacement that dynamic statical strain indicator gathers tested pipeline section and the resistance of soil be subject to, camera monitors the tested movement locus of pipeline section motion overall process and the deformation rule of the soil body.
After off-test, close servomotor speed reduction unit, sound state strain acquirement instrument and camera successively, repairing experiment data, the Different Weight pipeline adopting the utility model to measure is without drag displacement curve during initial buried depth and path curves as shown in Figure 5 and Figure 6.
Although be described preferred embodiment of the present utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, can also make a lot of form, these all belong within protection domain of the present utility model.
Claims (3)
1. a seabed pipe CYCLIC LOADING control and measuring system, is characterized in that, comprises test flume, power transmission, data collector, vertical deflection device and experiment accessory;
Described experiment accessory comprises the different lengths of steel pipes of many diameters and iron sand, the length of described lengths of steel pipes is less than the lumen width of described test flume, plug is provided with at the two ends of described lengths of steel pipes, the sidewall of described lengths of steel pipes is provided with back-up sand mouth, described back-up sand mouth is provided with door leaf, described door leaf is connected by the outer wall of hinge with described lengths of steel pipes, is formed with the chamber holding described iron sand in described lengths of steel pipes;
During test, a described lengths of steel pipes is banketed as tested pipeline section and is buried or be directly placed in described test flume, and described tested pipeline section is arranged along the Width of described test flume;
Described vertical deflection device is provided with above described tested pipeline section, described vertical deflection device comprises the web joint be fixed in above described tested pipeline section, a perpendicular vertical guide is respectively provided with in four bights of described web joint, described vertical guide is provided with slider I, described slider I and force transmitting board affixed, a slide block II affixed with it is each side provided with in the below of described force transmitting board, described slide block II is assemblied on horizontal longitudinal rail, described horizontal longitudinal rail is fixed on the end face of described test flume along the length direction of described test flume, depth transducer or clock gauge is connected with between described force transmitting board and described web joint, described web joint is provided with middle part loss of weight elongated hole,
Described force transmitting board is connected with described power transmission, described power transmission comprises gusset and leading screw, described leading screw is supported on the end face of described test flume by support, described gusset is connected with nut, described nut is threaded connection on described leading screw, described leading screw is driven by servomotor speed reduction unit, and described servomotor speed reduction unit is controlled by controller; Described gusset is connected on described horizontal longitudinal rail by slide block III, and described gusset is connected by pull pressure sensor with described force transmitting board;
Described data acquisition system (DAS) comprises described pull pressure sensor, described depth transducer or described clock gauge, sound state strain acquirement instrument, a computing machine and a camera, described pull pressure sensor is connected with described sound state strain acquirement instrument respectively with described depth transducer or described clock gauge, and described sound state strain acquirement instrument is connected with described computing machine respectively with described camera; Described camera to be fixed on support bar and to obtain the image of the anterior soil body of described tested pipeline section direction of motion, and described support bar is fixed on described force transmitting board.
2. seabed pipe CYCLIC LOADING control and measuring system according to claim 1, it is characterized in that, the surrounding of described test flume is sealing, and the sidewall of described test flume adopts tempered glass to make, and the sidewall of described test flume is provided with the scale arranged along short transverse.
3. seabed pipe CYCLIC LOADING control and measuring system according to claim 1, it is characterized in that, described plug is formed by shut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356521.0U CN204649454U (en) | 2015-05-28 | 2015-05-28 | Seabed pipe CYCLIC LOADING control and measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520356521.0U CN204649454U (en) | 2015-05-28 | 2015-05-28 | Seabed pipe CYCLIC LOADING control and measuring system |
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| CN204649454U true CN204649454U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520356521.0U Withdrawn - After Issue CN204649454U (en) | 2015-05-28 | 2015-05-28 | Seabed pipe CYCLIC LOADING control and measuring system |
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| CN (1) | CN204649454U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849085A (en) * | 2015-05-28 | 2015-08-19 | 天津大学 | Seabed tube section circulation loading monitoring and testing system |
| CN105699104A (en) * | 2016-01-16 | 2016-06-22 | 湖北霍洛曼航空设备工程有限公司 | High-speed flexible slide rail test device |
-
2015
- 2015-05-28 CN CN201520356521.0U patent/CN204649454U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849085A (en) * | 2015-05-28 | 2015-08-19 | 天津大学 | Seabed tube section circulation loading monitoring and testing system |
| CN104849085B (en) * | 2015-05-28 | 2017-08-22 | 天津大学 | Seabed pipe CYCLIC LOADING monitors test system |
| CN105699104A (en) * | 2016-01-16 | 2016-06-22 | 湖北霍洛曼航空设备工程有限公司 | High-speed flexible slide rail test device |
| CN105699104B (en) * | 2016-01-16 | 2018-07-24 | 湖北霍洛曼航空设备工程有限公司 | High-speed flexible sled test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150916 Effective date of abandoning: 20170822 |