CN104374656A - Submarine pipeline lateral moving loadtest device - Google Patents
Submarine pipeline lateral moving loadtest device Download PDFInfo
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- CN104374656A CN104374656A CN201410438850.XA CN201410438850A CN104374656A CN 104374656 A CN104374656 A CN 104374656A CN 201410438850 A CN201410438850 A CN 201410438850A CN 104374656 A CN104374656 A CN 104374656A
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Abstract
The invention belongs to the technical field of ocean engineering, and relates to a submarine pipeline lateral reciprocating moving load test device, including a sand tank, a test pipeline, a drum, a traction mechanism and a force measuring system, the upper frame of the sand tank is rectangular, two sliding rails provided with slide blocks are fixed between two short edges of the upper frame, the slide blocks are connected with each other by a truss structure; two steel rods are vertically fixed on the test pipeline, the drum twined with two appropriate-length steel wire ropes is arranged close to the front end of the sand tank, a plurality of fixed pulleys used support, guide or veer the steel wire ropes are fixed at the different parts of the upper frame of the sand tank, the force measuring system is used to obtain subjected lateral horizontal cyclic load of the test pipeline. The submarine pipeline lateral reciprocating moving load test device can reduce the error of a measuring device, reduce test operation difficulty, and improve the test precision under conventional gravity field during use in study on pipe-soil interaction mechanism.
Description
Art
The invention belongs to submarine pipeline experimental technique field, is that a kind of submarine pipeline side direction moves back and forth load test device.
Background technology
In recent years, marine oil and gas engineering develops to deep-sea gradually.The normal work of submarine pipeline is the important leverage of deep-sea oil gas exploitation, and deep seafloor pipeline is generally naked puts (do not ditch and bury underground) in sea bed surface, or part is embedding.In pipe under High Temperature High Pressure effect, can lateral buckling be there is in the naked pipeline put on sea bed surface, generation is displaced sideways, submarine pipeline routing moves, appropriate lateral buckling can reduce axle pressure, is conducive to the safety of pipeline, and excessive being displaced sideways can cause local stress to exceed yield limit, thus cause pipeline configuration to destroy, cause Important Project accident.In order to study being displaced sideways of pipeline, needing to understand pipe-soil interaction mechanism in depth, determining the side load that submarine pipeline is displaced sideways process and is subject to, this studies the key theory and technical matters that pipeline is displaced sideways at present.Because the deep-sea depth of water reaches more than 1000 meters, what cannot enter actual seabed testing conduit is displaced sideways load, therefore proving installation reasonable in design in laboratory and measuring technology is needed, test naked put submarine pipeline be displaced sideways load, disclose the interaction mechanism between submarine pipeline and soil.
Pipe-soil interaction test is generally divided into conventional articulated gravity test after the match and centrifugal test.Wherein conventional articulated gravity test after the match can determine the interactively of the embedding pipeline of unburied pipeline, part or complete embedding pipeline and soil, but the test of conventional articulated gravity field can not meet the dynamic similitude law of soil completely, the damping force order of magnitude causing measurement mechanism to be introduced is larger, even under some operating mode close to the acting force of soil to pipeline, have a strong impact on the control errors of test, and to test in the common mechanical load mode that adopts at conventional articulated gravity, the device more complicated that restrained line rolls, and new damping force can be introduced, increase error.In the test using foil gauge or pressure transducer, the quality of human users and proficient have very large impact for test findings.Centrifugal test is by increasing the acceleration of model field, under the prerequisite ensureing prototype and model geometric similarity, the mechanical characteristic of the soil body can be kept similar, simulate the load level equal or close with master mould, but centrifugal test equipment investment in early stage is higher, at the bottom of economic benefit, there is certain limitation for solution engineering problem.In addition, domesticly at present focus mostly in pipeline one-way movement for naked submarine pipeline of putting in the achievement in research of sand apparent motion, little for the reciprocating research of pipeline.
This invention exploits a kind of novel conventional articulated gravity mechanical load-measurement mechanism after the match, the soil acting force that unburied pipeline is subject in the reciprocatory movement of sand surface can be measured.Measurement mechanism does not contact with soil, is arranged between soil and sliding system, can not introduce extra damping force, decreases error term, test total error reduces; In addition also have multiple beneficial effect, solve some test difficult problems (referring to (six)).This equipment mechanism is simple, and function is complete, and measure efficiency high, manufacturing cost is lower, has higher economic benefit and engineering practical value.
Summary of the invention
The object of the invention is to develop a kind of deep seafloor pipe side to travelling load tester for testing, for the load at laboratory build-in test submarine pipeline side direction reciprocating movement, this device can use when studying pipe-soil interaction mechanism, greatly can reduce the error that measurement mechanism produces, reduce the operation easier of test, improve conventional articulated gravity test accuracy after the match, for pipe-soil interaction test provides reliable, an efficient mechanics device.Technical scheme of the present invention is as follows:
A kind of submarine pipeline side direction moves back and forth load test device, comprise the sand launder (1), test pipe (4), cylinder (2), haulage gear and the dynamometric system (19) that are covered with sand, test pipe (4) is naked is placed in sand surface, wherein
The top frame (13) of sand launder (1) is rectangle, the slide rail (9) that twice are parallel to each other is fixed with between two minor faces of top frame (13), per pass slide rail (9) is provided with two slide blocks (8), utilize the main body I shape truss-frame structure (7) parallel with described two limits to be interconnected between four slide blocks (8), truss-frame structure (7) carries out the movable of horizontal direction by slide block (8) on slide rail (9);
Two steel poles (5) are vertically fixed with near the position at middle part at test pipe (4), utilize jackscrew to be respectively fixed with a bearing seat (6) at the height that the top of two steel poles (5) is same, bearing seat (6) is fixed on truss-frame structure (7); Bearing seat (6) makes steel pole (5) and test pipe (4) move freely at vertical direction or fix by unclamping or tightening of jackscrew;
The drum shaft (14) with two described limit parallel of the top frame (13) of sand launder (1) is fixed with in the position near sand launder (1) front end, drum shaft (14) is provided with cylindrical roller (2), cylindrical roller (2) is wound with the wire rope of two suitable lengths; Drum shaft (14) is driven by haulage gear;
Be fixed with the fixed pulley that four are played support and guide effect in the front portion on sand launder (1) top frame (13), two are positioned at anterior side, and two other is positioned at anterior opposite side, at each fixed pulley (11) fixing two steering-effectings of the front and rear of truss-frame structure (7), be fixed with the fixed pulley (12) that two are played steering-effecting at the rear portion of top frame (13), lay respectively at the both sides at rear portion, from first steel wire that cylindrical roller (2) is drawn, truss-frame structure (7) is arrived anterior after the guiding of a fixed pulley (16) of fixing via the side that top frame (13) is anterior, turn to 180 ° via two fixed pulleys (11) that truss-frame structure (7) is anterior successively again, after the guiding finally by the fixing fixed pulley (17) of the opposite side anterior by top frame (13), get back to cylindrical roller (2), be fixed with the fixed pulley that two are played steering-effecting at the rear portion of top frame (13), lay respectively at the both sides at rear portion, from second steel wire that cylindrical roller (2) is drawn, rear portion from truss-frame structure (7) below through arrival upper edge frame (13) after the guiding of a fixed pulley (15) of fixing via the side that top frame (13) is anterior, 180 ° are turned to again via the fixed pulley (12) being positioned at frame rear portion, top, arrive truss-frame structure (7) rear portion, 180 ° are turned to successively again via two fixed pulleys (11) at truss-frame structure (7) rear portion, 180 ° are turned to again afterwards via another fixed pulley (12) at top frame (13) rear portion, cylindrical roller (2) is got back to after finally again passing the guiding of a fixed pulley (18) of the opposite side through being fixed on frame front portion, top from truss-frame structure (7) below.
Described dynamometric system (19) comprises and is arranged on the upper force cell of two steel poles (5), for obtaining the side direction horizontal cyclic loading that test pipe is subject to.
Wherein, haulage gear comprises the frequency converter, motor, wheel box and the shaft coupling that connect successively, and the shaft coupling other end is connected with drum shaft (14).
Described force cell is foil gauge, and before and after the suitable At The Height of every root steel pole, each subsides foil gauge, is connected into full-bridge, is wired to electric wire strain gauge.
Outstanding advantages of the present invention and putting the axe in the helve:
1, dynamometric system (vertical steel pole and on foil gauge etc.) does not contact with soil, can not introduce extra damping force, can reduce error (directly reducing error term), improves test accuracy;
2, dynamometric system (vertical steel pole and on foil gauge etc.) is arranged between pipeline and slide rail, the frictional resistance of slide rail can not be had an impact to test findings, can reduce error (directly reducing error term), improves test accuracy;
3, vertical member upper end bearing seat is fixed.When bearing seat is provided with jackscrew.In the test only studying soil lateral resistance, tighten jackscrew, keep stiff end constraint; In the test of adjoint rising or depression when studying pipeline and being displaced sideways, unclamp jackscrew, make vertical steel pole in vertical direction free movement.Device is reliable, flexibly, when carrying out the test of different group, can efficiently switch.
4, vertical steel pole and test pipe vertical welding, side direction establishes bracket to support, and can not roll when pipeline is displaced sideways, and eliminates the measured value produced because pipeline rolls in process of the test and reduces or sudden change, improve degree of accuracy and the stability of test.
5, by the pulley system in test unit, motor rotates forward-reverses and can realize the to-and-fro movement of pipeline on sand surface, by test unit, and the cyclic loading be subject to when can measure test pipe to-and-fro movement, simple to operate, run efficient.In pipeline reciprocatory movement, the signal that measuring system exports is by sign symbol reflection pipe motion direction.
6, test utilizes fixed pulley to change the lead of wire rope, no matter the truss-frame structure that test pipe and upper end thereof connect advances or retreats, equal from the power the same steel cable that fixed pulley two ends are drawn respectively, make the tractive force symmetery be subject in test pipe traveling process, the level of pipeline is displaced sideways and deflection can not occurs.
7, resistance strain gage is attached on vertical steel pole, and before and after the suitable At The Height of the vertical steel pole of every root, each subsides foil gauge (two bars totally 4 foil gauges), is connected into full-bridge.On test pipe, some unit level power is applied, the output signal of calibration measurements system acquisition before test.Beneficial effect: 1) after foil gauge position is determined, signal acquisition point is determined then to the distance of test pipe, and change the fixed position of vertical steel pole upper end, measured value can not change, and improves test accuracy; 2) because the relation of input signal and output signal is by demarcating to determine, and test is all in linear-elastic range, so degree of registration, vertically degree etc. that foil gauge is pasted do not have an impact to test findings, eliminate the test error of the paster operation introducing because of testing crew, substantially increase test accuracy (directly reducing error term).3) due to the superiority of this metering system, this test is without the need to adopting high-acruracy survey instrument, and precision is high, at the bottom of cost, flexible and efficient, can be able to widespread use in engineering.
Accompanying drawing explanation
Fig. 1 is that pipe side of the present invention is to nigration device overall schematic;
Fig. 2 is sand launder-slide rail-haulage gear schematic diagram of the present invention;
Fig. 3 is sliding system schematic diagram of the present invention;
Fig. 4 is truss-frame structure schematic diagram of the present invention;
Fig. 5 is test pipe of the present invention-measuring system schematic diagram.
In figure: 1, sand launder, 2, cylindrical roller, 3, sand, 4, test pipe, 5, vertical steel pole, 6, bearing seat, 7, truss-frame structure, 8, slide block, 9, slide rail, 10, first group of fixed pulley (being made up of fixed pulley 15, fixed pulley 16, fixed pulley 17, fixed pulley 18), 11, second group of fixed pulley, the 12, the 3rd group of fixed pulley, 13, sand launder top frame, 14, drum shaft, 15, dynamometric system 19.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Submarine pipeline side direction moves back and forth load test device, comprise the sand launder 1, haulage gear (not shown in FIG.) and the cylindrical roller 2 that are covered with sand 3, be erected at the sliding system on sand launder top frame 13, nakedly put the test pipe 4 on sand 3, other devices such as vertical steel pole 5 and truss-frame structure 7.
Sand launder 1 is rectangular parallelepiped, and frame angle steel welds, and certain thickness plank is laid on the end, forward and backward, the right side, and the left side is the glass epoxy of some strength.The top frame 13 of sand launder 1 is rectangle, twice slide rail 9 is fixed with between two minor faces of top frame 13, on twice slide rail 9, left and right is respectively provided with between two slide blocks, 8, four slide blocks 8 and utilizes one to be interconnected with described two truss-frame structures that minor face is parallel 7.Truss-frame structure 7 can carry out the movable of horizontal direction by slide block 8 on slide rail 9.Be provided with and described two drum shafts that minor face is parallel to each other 14 in the position near sand launder 1 front end, fixed cylinder cylinder 2 on drum shaft 14, cylindrical roller 2 be wound around the wire rope of two suitable lengths.
Be covered with appropriate sand 3 in sand launder 1, test pipe 4 is naked to be put on sand 3.Vertically be fixed with two steel poles be parallel to each other 5 at test pipe 4 near the position at middle part, steel pole 5 lower end and test pipe 4 bearing add bracket and support, and steel pole 5 does not contact with soil.Utilize jackscrew to be separately fixed on a bearing seat 6 at the identical At The Height in the top of two steel poles 5, bearing seat 6 is fixed on truss-frame structure 7.When the jackscrew on bearing seat 6 is tightened, the upper end constraint type of steel pole 5 becomes stiff end, fixes with truss-frame structure; When the jackscrew on bearing seat 6 unclamps, the upper end vertical freedom degree of steel pole 5 is decontroled, and horizontal degree of freedom still retrains, and test pipe 4 is being displaced sideways in process with vertical steel pole 5 can is freely rising or decline.
The fixed pulley 10 that four are played support and guide effect is fixed in frame 13 front end, sand launder top, and the fixed pulley 12 that two are played steering-effectings is fixed in rear end, each fixed pulley 11 fixing two steering-effectings before and after truss-frame structure 7.The steel cable that cylinder 2 is drawn is from the middle keep right of cylinder 2, through the fixed pulley 16 in first group of fixed pulley, arrive truss-frame structure 7 front end, successively through two fixed pulleys 11 of truss-frame structure 7 front end, direction changes 180 °, through the fixed pulley 17 in first group of fixed pulley, the centre getting back to cylinder 2 keeps left part.Second wire rope that cylinder 2 is drawn is from the right of cylinder 2, through the fixed pulley 15 in first group of fixed pulley, pass through below truss-frame structure 7, until frame 13 rear end, sand launder top, through the 3rd group of fixed pulley 12, direction changes 180 °, when getting back to truss-frame structure 7 rear end, successively through two fixed pulleys 11 of truss-frame structure 7 rear end, direction changes 180 °, again arrive frame 13 rear end, sand launder top, through the 3rd group of fixed pulley 12, direction changes 180 °, pass through below truss-frame structure 7, through the fixed pulley 18 in first group of fixed pulley, finally get back to cylinder 2 left side.No matter truss-frame structure 7 advances or retreats, only have one with wire rope tension, another root relaxes, and be equal from the power the same steel cable that fixed pulley two ends are drawn respectively, make left and right stress equalization in truss-frame structure 7 traveling process, can not there is deflection in horizontal side in test pipe 4 in moving process.
Appropriate position on two vertical steel poles 5,2 (totally 4) foil gauges are respectively pasted in front and back, and foil gauge is connected into full-bridge, by wire contact resistance strainmeter-data collecting instrument-computing machine, form measuring system.
Before test is carried out, to demarcate measuring system.Bearing seat 6 is taken off from truss-frame structure 7, be fixed on stable testing table, jackscrew is tightened, vertical steel pole upper end is made to become stiff end, in the surface level at the axle place of test pipe 4, test pipe 4 applies the side direction horizontal acting force perpendicular to pipeline, increases acting force gradually, demarcate the registration of dynamometric system 19 simultaneously.After demarcation terminates, bearing seat 6 is retightened on truss-frame structure 7 together with vertical steel pole 5 and test pipe 4.
In process of the test, motor is by frequency converter and reducer casing reduction of speed, pull the wire rope on cylinder 2, the truss-frame structure 7 on slide rail 9 is driven to move ahead, truss-frame structure 7 drives the vertical steel pole 5 below it and test pipe 4 to move forward by bearing seat 6, and makes test pipe 4 and sand 3 produce interaction.The measuring system that application is demarcated in advance measures the side direction horizontal acting force of the sand 3 that test pipe is subject to.Motor rotates forward-reversion, can realize the to-and-fro movement of test pipe 4 on sand 3, and measuring system can the side direction horizontal cyclic loading that is subject to of output test pipeline 4.
Claims (3)
1. a submarine pipeline side direction moves back and forth load test device, comprise the sand launder (1), test pipe (4), cylinder (2), haulage gear and the dynamometric system that are covered with sand, test pipe (4) is naked is placed in sand surface.Wherein,
The top frame (13) of sand launder (1) is rectangle, the slide rail (9) that twice are parallel to each other is fixed with between two minor faces of top frame (13), per pass slide rail (9) is provided with two slide blocks (8), utilize the main body I shape truss-frame structure (7) parallel with described two limits to be interconnected between four slide blocks (8), truss-frame structure (7) carries out the movable of horizontal direction by slide block (8) on slide rail (9);
Two steel poles (5) are vertically fixed with near the position at middle part at test pipe (4), utilize jackscrew to be respectively fixed with a bearing seat (6) at the height that the top of two steel poles (5) is same, bearing seat (6) is fixed on truss-frame structure (7); Bearing seat (6) makes steel pole (5) and test pipe (4) move freely at vertical direction or fix by unclamping or tightening of jackscrew;
The drum shaft (14) with two described limit parallel of the top frame (13) of sand launder (1) is fixed with in the position near sand launder (1) front end, drum shaft (14) is provided with cylindrical roller (2), cylindrical roller (2) is wound with the wire rope of two suitable lengths; Drum shaft (14) is driven by haulage gear;
Be fixed with the fixed pulley that four are played support and guide effect in the front portion on sand launder (1) top frame (13), two are positioned at anterior side, and two other is positioned at anterior opposite side, at each fixed pulley (11) fixing two steering-effectings of the front and rear of truss-frame structure (7), be fixed with the fixed pulley (12) that two are played steering-effecting at the rear portion of top frame (13), lay respectively at the both sides at rear portion, from first steel wire that cylindrical roller (2) is drawn, truss-frame structure (7) is arrived anterior after the guiding of a fixed pulley (16) of fixing via the side that top frame (13) is anterior, turn to 180 ° via two fixed pulleys (11) that truss-frame structure (7) is anterior successively again, after the guiding finally by the fixing fixed pulley (17) of the opposite side anterior by top frame (13), get back to cylindrical roller (2), be fixed with the fixed pulley that two are played steering-effecting at the rear portion of top frame (13), lay respectively at the both sides at rear portion, from second steel wire that cylindrical roller (2) is drawn, rear portion from truss-frame structure (7) below through arrival upper edge frame (13) after the guiding of a fixed pulley (15) of fixing via the side that top frame (13) is anterior, 180 ° are turned to again via the fixed pulley (12) being positioned at frame rear portion, top, arrive truss-frame structure (7) rear portion, 180 ° are turned to successively again via two fixed pulleys (11) at truss-frame structure (7) rear portion, 180 ° are turned to again afterwards via another fixed pulley (12) at top frame (13) rear portion, cylindrical roller (2) is got back to after finally again passing the guiding of a fixed pulley (18) of the opposite side through being fixed on frame front portion, top from truss-frame structure (7) below.
Described dynamometric system comprises and is arranged on the upper force cell of two steel poles (5), for obtaining the side direction horizontal cyclic loading that test pipe is subject to.
2. test unit according to claim 1, is characterized in that, haulage gear comprises the frequency converter, motor, wheel box and the shaft coupling that connect successively, and the shaft coupling other end is connected with drum shaft (14).
3. test unit according to claim 1, is characterized in that, described force cell is foil gauge, and before and after the suitable At The Height of every root steel pole, each subsides foil gauge, is connected into full-bridge, is wired to electric wire strain gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410438850.XA CN104374656B (en) | 2014-08-29 | 2014-08-29 | Submarine pipeline lateral moving loadtest device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410438850.XA CN104374656B (en) | 2014-08-29 | 2014-08-29 | Submarine pipeline lateral moving loadtest device |
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| CN104374656A true CN104374656A (en) | 2015-02-25 |
| CN104374656B CN104374656B (en) | 2017-01-18 |
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| CN201410438850.XA Expired - Fee Related CN104374656B (en) | 2014-08-29 | 2014-08-29 | Submarine pipeline lateral moving loadtest device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699287A (en) * | 2016-03-15 | 2016-06-22 | 天津大学 | Unconstrained pipe section axial cyclic loading testing system |
| CN106093046A (en) * | 2016-07-21 | 2016-11-09 | 天津大学 | Submerged pipeline level is to pipeclay interaction test system |
| CN109001060A (en) * | 2018-07-18 | 2018-12-14 | 西南交通大学 | A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method |
| CN111562073A (en) * | 2020-04-17 | 2020-08-21 | 太原理工大学 | Railway bridge creep test loading device under action of vehicle-induced cyclic load |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699287A (en) * | 2016-03-15 | 2016-06-22 | 天津大学 | Unconstrained pipe section axial cyclic loading testing system |
| CN106093046A (en) * | 2016-07-21 | 2016-11-09 | 天津大学 | Submerged pipeline level is to pipeclay interaction test system |
| CN106093046B (en) * | 2016-07-21 | 2018-09-18 | 天津大学 | Submerged pipeline horizontal direction pipeclay interaction test system |
| CN109001060A (en) * | 2018-07-18 | 2018-12-14 | 西南交通大学 | A kind of drawing hoist cable pulling force width and the two-way index fatigue experimental device of anchored end corner and method |
| CN111562073A (en) * | 2020-04-17 | 2020-08-21 | 太原理工大学 | Railway bridge creep test loading device under action of vehicle-induced cyclic load |
| CN111562073B (en) * | 2020-04-17 | 2021-11-16 | 太原理工大学 | Railway bridge creep test loading device under action of vehicle-induced cyclic load |
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| CN104374656B (en) | 2017-01-18 |
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