CN104374656B - Submarine pipeline lateral moving loadtest device - Google Patents

Submarine pipeline lateral moving loadtest device Download PDF

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Publication number
CN104374656B
CN104374656B CN201410438850.XA CN201410438850A CN104374656B CN 104374656 B CN104374656 B CN 104374656B CN 201410438850 A CN201410438850 A CN 201410438850A CN 104374656 B CN104374656 B CN 104374656B
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China
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fixed
frame
truss
test
fixed pulley
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CN201410438850.XA
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Chinese (zh)
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CN104374656A (en
Inventor
唐友刚
张少洋
王臻魁
张若瑜
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天津大学
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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 which is arranged close to the front end of the sand tank is twined with two appropriate-length steel wire ropes, 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

A kind of submarine pipeline shifted laterally load test device

Art

The invention belongs to submarine pipeline experimental technique field, it is that a kind of submarine pipeline laterally moves back and forth load test dress Put.

Background technology

In recent years, marine oil and gas engineering gradually develops to deep-sea.The normal work of submarine pipeline is deep-sea oil gas exploitation Important leverage, and deep seafloor pipeline is typically naked puts (not ditching embedded) in sea bed surface, or be partly embedded into.In pipe, high temperature is high Under pressure effect, the naked pipeline put on sea bed surface can occur lateral buckling, produces shifted laterally, and submarine pipeline routing moves Move, appropriate lateral buckling can reduce axial compressive force, be conducive to the safety of pipeline, and excessive shifted laterally can lead to local stress Exceeding yield limit, thus leading to pipeline configuration to destroy, causing Important Project accident.In order to study the lateral shifting of pipeline Dynamic, need to understand pipe-soil interaction mechanism in depth, determine the lateral load that submarine pipeline shifted laterally process is subject to, this is The key theory of research pipeline shifted laterally at present and technical problem.Because the deep-sea depth of water reaches more than 1000 meters it is impossible to enter real The shifted laterally load of pipeline is tested it is therefore desirable in the indoor test device reasonable in design of experiment and measuring technology in border seabed, Test the naked shifted laterally load putting submarine pipeline, disclose the interaction mechanism between submarine pipeline and soil.

Pipe-soil interaction test is generally divided into conventional articulated gravity test off field and centrifugal test.Wherein conventional articulated gravity field Under test can determine unburied pipeline, be partly embedded into pipeline or the interactively of completely embedding pipeline and soil, but conventional Gravitational field test can not fully meet the dynamic similitude law of soil, leads to the damping force order of magnitude that measurement apparatus introduce larger, Even under some operating modes close to soil the active force to pipeline, had a strong impact on the error control of test, and in conventional weight In the adopted common mechanical load mode of power test, the device that restrained line rolls is more complicated, and can introduce new resistance Buddhist nun's power, increases error.In the test using foil gauge or pressure transducer, the quality of human users and proficient are for examination Testing result has very big impact.Centrifugal test is passed through to increase the acceleration of model field, is ensureing that prototype is similar to model geometric On the premise of, the mechanical characteristic of the soil body can be kept similar, simulate the load level equal or close with master mould, but centrifugation Test early stage equipment investment is higher, economic benefit bottom, has certain limitation for solving engineering problem.Additionally, at present Domestic focus mostly in pipeline one-way movement for naked submarine pipeline of putting in the achievement in research of sand apparent motion, reciprocal for pipeline The research of motion is little.

The present invention develops a kind of new conventional articulated gravity mechanical load-measurement apparatus off field, can measure unburied pipeline The soil active force being subject in the reciprocatory movement of sand surface.Measurement apparatus are not contacted with soil, are arranged on soil and cunning Between dynamic system, extra damping force will not be introduced, decrease error term, test total error reduces;In addition with multiple beneficial effect Really, if solving a dry test difficult problem (referring to (six)).This equipment mechanism is simple, and completely, measurement efficiency is high, and manufacturing cost is relatively for function Low, there are higher economic benefit and engineering practical value.

Content of the invention

It is an object of the invention to developing a kind of deep seafloor pipeline shifted laterally load test assay device, in reality Test the load of the lateral reciprocating movement of indoor test submarine pipeline, this device can make when studying pipe-soil interaction mechanism With the error of measurement apparatus generation can be substantially reduced, reduces the operation easier of test, improve conventional articulated gravity test essence off field Degree, provides reliability, an efficient mechanics device for pipe-soil interaction test.Technical scheme is as follows:

A kind of submarine pipeline laterally moves back and forth load test device, including the sand launder (1), the test pipe that are covered with sand (4), cylinder (2), haulage gear and dynamometric system (19), test pipe (4) is naked to be placed in sand surface, wherein,

The top frame (13) of sand launder (1) is rectangle, is fixed with twice phase between two minor faces of top frame (13) Mutually parallel slide rail (9), are provided with two slide blocks (8) on per pass slide rail (9), utilize a master between four slide blocks (8) Body is connected with each other with described two parallel I shape truss structures (7) in side, and truss structure (7) passes through slide block (8) in slide rail (9) carry out the movable of horizontal direction on;

It is vertically and fixedly provided with two steel poles (5) in test pipe (4) near the position at middle part, on the top of two steel poles (5) Same height is respectively fixed with a bearing block (6) using jackscrew, and bearing block (6) is fixed on truss structure (7);Bearing block (6) pass through unclamping or tightening so that steel pole (5) and test pipe (4) move freely or fixation in vertical direction of jackscrew;

It is fixed with the position near sand launder (1) front end and put down with the two top frame (13) of sand launder (1) described sides The parallel drum shaft (14) of row, is provided with cylindrical roller (2) on drum shaft (14), is wound with two on cylindrical roller (2) The steel wire rope of suitable length;Drum shaft (14) is driven by haulage gear;

It is fixed with four in the front portion on sand launder (1) top frame (13) and act the fixed pulley supporting with guide effect, two positions In anterior side, two other is located at anterior opposite side;The front and rear of truss structure (7) each fix two rise turn Fixed pulley (11) to effect;It is fixed with two fixed pulleys (12) playing steering-effecting at the rear portion of top frame (13), respectively Both sides positioned at rear portion;First steel wire drawn from cylindrical roller (2), fixing via the anterior side of top frame (13) Truss structure (7) front portion is reached after the guiding of one fixed pulley (16), more successively via two fixed cunnings that truss structure (7) is anterior Wheel (11) turns to 180 °, finally returns after the guiding via a fixing fixed pulley (17) of the anterior opposite side of top frame (13) To cylindrical roller (2);It is fixed with two fixed pulleys playing steering-effecting at the rear portion of top frame (13), be located at rear portion respectively Both sides;Second steel wire drawn from cylindrical roller (2), via the fixed pulley that the anterior side of top frame (13) is fixing (15) pass through the rear portion of top frame (13) after guiding below truss structure (7), then via after the frame of top One fixed pulley (12) in portion turns to 180 °, reaches truss structure (7) rear portion, more successively via the two of truss structure (7) rear portion Individual fixed pulley (11) turns to 180 °, turns to 180 ° via another fixed pulley (12) at top frame (13) rear portion more afterwards, The guiding of a fixed pulley (18) through being fixed on the anterior opposite side of top frame is passed through afterwards again below truss structure (7) After return to cylindrical roller (2).

Described dynamometric system (19) includes being arranged on the upper force cell of two steel poles (5), for obtaining test pipe The side direction horizontal cyclic loading being subject to.

Wherein, haulage gear includes converter, motor, change speed gear box and the shaft coupling being sequentially connected, the shaft coupling other end with Drum shaft (14) is connected.

Described force cell is foil gauge, at the suitable height of every steel pole before and after respectively paste a foil gauge, connect Become full-bridge, be wired to resistance strain gauge.

Outstanding advantages of the present invention and putting the axe in the helve:

1st, dynamometric system (vertical steel pole and foil gauge thereon etc.) is not contacted with soil, will not introduce extra damping Power, can reduce error (directly reducing error term), improve test accuracy;

2nd, dynamometric system (vertical steel pole and foil gauge thereon etc.) is arranged between pipeline and slide rail so that the rubbing of slide rail Wipe resistance and will not produce impact to result of the test, error (directly reducing error term) can be reduced, improve test accuracy;

3rd, vertical member upper end bearing block is fixed.When bearing block is provided with jackscrew.Only studying soil lateral resistance In test, tighten jackscrew, keep fixing end constraint;In the test of adjoint rising or depression when studying pipeline shifted laterally, Unclamp jackscrew, make vertical steel pole freely-movable in vertical direction.Device is reliable, flexibly, when carrying out the other test of different group, can Switched with efficient.

4th, vertical steel pole and test pipe vertical welding, laterally sets bracket and supports, make will not occur during pipeline shifted laterally Roll, eliminate that in process of the test, the measured value that produces reduces or is mutated because pipeline rolls, improve the degree of accuracy of test with Stability.

5th, pass through the pulley system in assay device, it is past on sand surface that motor rotating forward reversion can realize pipeline Multiple motion, by assay device, the cyclic loading being subject to when can be moved back and forth with experiment with measuring pipeline, simple to operate, operation is high Effect.In pipeline reciprocatory movement, the signal of dynamometric system output reflects pipe motion direction by sign symbol.

6th, test changes the lead of steel wire rope using fixed pulley, no matter the truss knot that test pipe and its upper end connect Structure advances or retreats, and the power from the same steel cable that fixed pulley two ends are drawn respectively is equal so that test pipe The pull strength symmetery being subject in traveling process, the horizontal shifted laterally of pipeline will not glance off.

7th, resistance strain gage is attached on vertical steel pole, at the suitable height of every vertical steel pole before and after each one strain of patch Piece (two bar totally 4 foil gauges), is connected into full-bridge.Some unit level power are applied before test on test pipe, demarcates dynamometry The output signal of system acquisition.Beneficial effect: 1) after the determination of foil gauge position, the distance of signal acquisition point to test pipe Then determine, change the fixed position of vertical steel pole upper end, measured value will not change, and improves test accuracy;2) due to Input signal to be determined by demarcating with the relation of output signal, and tests all in linear-elastic range, so foil gauge is pasted Degree of registration, vertical degree etc. impact is not produced on result of the test, eliminate the examination introducing because of the paster operation of testing crew Test error, substantially increase test accuracy (directly reducing error term).3) due to the superiority of this metering system, this test is no Need to adopt high-acruracy survey instrument, high precision, cost bottom, flexible and efficient, extensively can be applied in engineering.

Brief description

Fig. 1 is the pipeline lateral nigration device overall schematic of the present invention;

Fig. 2 is the sand launder slide rail haulage gear schematic diagram of the present invention;

Fig. 3 is the sliding system schematic diagram of the present invention;

Fig. 4 is the truss structure schematic diagram of the present invention;

Fig. 5 is the test pipe dynamometric system schematic diagram of the present invention.

In figure: 1, sand launder, 2, cylindrical roller, 3, sand, 4, test pipe, 5, vertical steel pole, 6, bearing block, 7, truss knot 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), 11st, second group of fixed pulley, the 12, the 3rd group of fixed pulley, 13, sand launder top frame, 14, drum shaft, 19, dynamometric system.

Specific embodiment

With reference to the accompanying drawings and examples the present invention is described in detail.

Submarine pipeline laterally moves back and forth load test device, and including being covered with the sand launder 1 of sand 3, (in figure is not for haulage gear Draw) and cylindrical roller 2, it is erected at the sliding system on sand launder top frame 13, the naked test pipe 4 put on sand 3, hang down Straight other devices such as steel pole 5 and truss structure 7.

Sand launder 1 is cuboid, and frame is welded with angle steel, bottom, forward and backward, the certain thickness plank of right side laying, and the left side is one Determine the glass epoxy of intensity.The top frame 13 of sand launder 1 is rectangle, is fixed with twice between two minor faces of top frame 13 Slide rail 9, on twice slide rail 9, left and right is each provided with two slide blocks 8, short with described two using one between four slide blocks 8 The parallel truss structure in side 7 is connected with each other.Truss structure 7 can move before and after carrying out horizontal direction on slide rail 9 by slide block 8 Dynamic.It is 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, solid on drum shaft 14 Determine cylindrical roller 2, cylindrical roller 2 is wound around the steel wire rope of two suitable lengths.

It is covered with appropriate sand 3, test pipe 4 is naked to be put on sand 3 in sand launder 1.Test pipe 4 near middle part position It is vertically and fixedly provided with two steel poles being parallel to each other 5, steel pole 5 lower end and test pipe 4 bearing add bracket and support, and steel pole 5 is not Contact with soil.It is separately fixed at using jackscrew on a bearing block 6 at the identical height in the top of two steel poles 5, bearing block 6 It is fixed on truss structure 7.When the jackscrew on bearing block 6 is tightened, the upper end constraint type of steel pole 5 becomes fixing end, with purlin Frame structure is fixed;When the jackscrew on bearing block 6 unclamps, the upper end vertical freedom degree of steel pole 5 is decontroled, and horizontal degree of freedom is still about Bundle, test pipe 4 and vertical steel pole 5 can freely rise or fall during shifted laterally.

Sand launder top frame 13 front end is fixed four and is acted the fixed pulley 10 supporting with guide effect, and rear end is fixed two and risen and turns To the fixed pulley 12 of effect, each fixed pulleys 11 fixing two steering-effectings before and after truss structure 7.The first of cylinder 2 extraction Root steel wire rope keep right in the middle of cylinder 2, the fixed pulley 16 through in first group of fixed pulley, reach truss structure 7 front end, according to Secondary two fixed pulleys 11 through truss structure 7 front end, direction changes 180 °, the fixed pulley 17 through in first group of fixed pulley, The centre returning to cylinder 2 keeps left part.Second steel wire rope that cylinder 2 is drawn is from the right of cylinder 2, fixed through first group Fixed pulley 15 in pulley, passes through from truss structure 7 lower section, until sand launder top frame 13 rear end, through the 3rd group of fixed pulley 12, direction changes 180 °, when returning to truss structure 7 rear end, sequentially passes through two fixed pulleys 11 of truss structure 7 rear end, direction Change 180 °, arrive again at sand launder top frame 13 rear end, through the 3rd group of fixed pulley 12, direction changes 180 °, from truss knot Structure 7 lower section is passed through, and the fixed pulley 18 through in first group of fixed pulley is eventually returned to cylinder 2 left side.No matter truss structure 7 advances Or retreat, only one with steel wire rope tension, and another relaxes, and the same steel cable drawn respectively from fixed pulley two ends On power be equal so that in truss structure 7 traveling process left and right stress equalization, test pipe 4 is in horizontal shifted laterally During will not glance off.

Appropriate position on two vertical steel poles 5, respectively pastes 2 (totally 4) foil gauges in front and back, and foil gauge is connected into entirely Bridge, connects resistance strain gauge data collecting instrument computer by wire, constitutes dynamometric system.

Before test is carried out, dynamometric system be demarcated.Bearing block 6 is taken off from truss structure 7, is fixed on steady On fixed testing stand, jackscrew is tightened, make vertical steel pole upper end become fixing end, in the horizontal plane that the axle of test pipe 4 is located, Side direction horizontal active force perpendicular to pipeline is applied on test pipe 4, is gradually increased active force, demarcate dynamometric system 19 simultaneously Registration.After demarcation terminates, bearing block 6 is retightened on truss structure 7 together with vertical steel pole 5 and test pipe 4.

In process of the test, motor passes through converter and reduction box reduction of speed, pulls the steel wire rope on cylinder 2, drives and slides Truss structure 7 on rail 9 moves ahead, and truss structure 7 drives vertical steel pole 5 below and test pipe 4 forward by bearing block 6 Mobile, and so that test pipe 4 and sand 3 is produced and interact.The dynamometric system experiment with measuring pipeline that application is demarcated in advance is subject to Sand 3 side direction horizontal active force.Motor rotates forward and inverts, reciprocating motion on sand 3 for the achievable test pipe 4, The side direction horizontal cyclic loading that dynamometric system can be subject to output test pipeline 4.

Claims (3)

1. a kind of submarine pipeline laterally moves back and forth load test device, including be covered with the sand launder (1) of sand, test pipe (4), Cylindrical roller (2), haulage gear and dynamometric system (19), test pipe (4) is naked to be placed in sand surface, wherein,
The top frame (13) of sand launder (1) is rectangle, is fixed with twice mutually flat between two minor faces of top frame (13) The slide rail (9) of row, is provided with two slide blocks (8) on per pass slide rail (9), utilize between four slide blocks (8) main body with The parallel I shape truss structure (7) of two described minor faces is connected with each other, and truss structure (7) passes through slide block (8) in slide rail (9) On carry out the movable of horizontal direction;
It is vertically and fixedly provided with two steel poles (5) in test pipe (4) near the position at middle part, same on the top of two steel poles (5) Height be respectively fixed with a bearing block (6) using jackscrew, bearing block (6) is fixed on truss structure (7);Bearing block (6) leads to Cross unclamping or tightening so that steel pole (5) and test pipe (4) move freely or fixing in vertical direction of jackscrew;
It is fixed with parallel with the two top frame (13) of sand launder (1) described minor faces in the position near sand launder (1) front end Drum shaft (14), cylindrical roller (2) is provided with drum shaft (14), cylindrical roller (2) is wound with two suitably long The steel wire rope of degree;Drum shaft (14) is driven by haulage gear;
It is fixed with four in the front portion on sand launder (1) top frame (13) and acts the fixed pulley supporting with guide effect, two positioned at front The side in portion, two other is located at anterior opposite side;The front and rear of truss structure (7) each fix two rise turn to make Fixed pulley (11);It is fixed with two fixed pulleys (12) playing steering-effecting at the rear portion of top frame (13), be located at respectively The both sides at rear portion;First steel wire drawn from cylindrical roller (2), second fixing via the anterior side of top frame (13) Truss structure (7) is reached anterior after the guiding of fixed pulley (16), more successively via two fixed pulleys that truss structure (7) is anterior (11) turn to 180 °, finally via the 3rd fixing fixed pulley (17) of the anterior opposite side of top frame (13) lead back to Cylindrical roller (2);Second steel wire drawn from cylindrical roller (2), via the anterior side of top frame (13) fixing the Pass through the rear portion of top frame (13) below truss structure (7) after the guiding of one fixed pulley (15), then via positioned at upper One fixed pulley (12) at portion frame rear portion turns to 180 °, reaches truss structure (7) rear portion, more successively via truss structure (7) Two fixed pulleys (11) at rear portion turn to 180 °, turn to via another fixed pulley (12) at top frame (13) rear portion more afterwards 180 °, finally pass through the 4th fixed pulley through being fixed on the anterior opposite side of top frame again below truss structure (7) (18) lead back to cylindrical roller;Described dynamometric system includes being arranged on the upper force cell of two steel poles (5), is used for Obtain the side direction horizontal cyclic loading that test pipe is subject to.
2. assay device according to claim 1 is it is characterised in that haulage gear includes converter, the electricity being sequentially connected Machine, change speed gear box and shaft coupling, the shaft coupling other end is connected with drum shaft (14).
3. assay device according to claim 1 is it is characterised in that described force cell is foil gauge, at every Respectively paste a foil gauge before and after at the suitable height of steel pole, be connected into full-bridge, be wired to resistance strain gauge.
CN201410438850.XA 2014-08-29 2014-08-29 Submarine pipeline lateral moving loadtest device CN104374656B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN104374656B true CN104374656B (en) 2017-01-18

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* Cited by examiner, † Cited by third party
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
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

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US3434550A (en) * 1966-06-06 1969-03-25 Mobil Oil Corp Method and apparatus for lightening the load on a subsea conductor pipe
CN100565169C (en) * 2008-01-23 2009-12-02 中国科学院力学研究所 Detect the analogy method and the analogue means thereof of lateral stability of directly laid pipes on sea floor
CN202631275U (en) * 2012-04-09 2012-12-26 浙江大学 Novel seabed pipe soil interacting model test platform
CN103353370A (en) * 2013-06-27 2013-10-16 天津大学 Soil mass resistance determination apparatus when oil gas pipeline on seabed generates transverse large deformation
CN103364124A (en) * 2013-06-27 2013-10-23 天津大学 Measuring device for soil resistance stressed on subsea oil and gas pipeline during horizontal movement
CN103353517A (en) * 2013-06-27 2013-10-16 天津大学 Testing device for measuring soil resistance in motion process of buried submarine pipeline

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