CN102778395B - In-service pipeline settlement simulation test method and device - Google Patents

In-service pipeline settlement simulation test method and device Download PDF

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Publication number
CN102778395B
CN102778395B CN201110124685.7A CN201110124685A CN102778395B CN 102778395 B CN102778395 B CN 102778395B CN 201110124685 A CN201110124685 A CN 201110124685A CN 102778395 B CN102778395 B CN 102778395B
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China
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testing conduit
pipeline
testing
conduit
water filling
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CN201110124685.7A
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Chinese (zh)
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CN102778395A (en
Inventor
冯庆善
王学力
张海亮
李荣光
宋汉成
燕冰川
周利剑
陈健
王富祥
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中国石油天然气股份有限公司
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Publication of CN102778395A publication Critical patent/CN102778395A/en
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Abstract

Relating to the technical field of pipeline systems, the invention relates to an in-service pipeline settlement simulation test method and a device. The test method comprises: hoisting a tested pipeline (2) onto two support frames (4), adjusting the size of the support frames (4) according to the diameter of the tested pipeline (2) and conducting fixation; additionally hanging nominal weights (3) at preset positions over the tested pipeline (2), observing the pipeline settlement degree through a scale at the midspan of the tested pipeline (2); and then exerting an internal pressure on the tested pipeline (2) through a pressurizing pump, testing the pressure bearing capacity of the pipeline (2) under the combined action of the internal pressure and a bending load. The method and device provided in the invention can simulate the real stress bearing condition of a pipeline with defects, and improve the accuracy of a pipeline integrity assessment result.

Description

A kind of in-service pipeline sedimentation analog detection method and device

Technical field

The present invention is a kind of in-service pipeline sedimentation analog detection method and device.Relate to piping system technical field.

Background technology

Pipeline bearing capacity test is to evaluate one of important method of pipeline integrity situation, and test result can be pipeline management person's decision-making provides foundation and reference.Buried in-service pipeline except bearing interior pressure, the bending stress that be also subject to because soil moves, sedimentation and extruding lifting etc. produces.At present pipeline bearing capacity test be take simple hydrostatic test or pressure surge test as main, and buried pipeline is except bearing interior pressure, also bears the bending stress producing due to soil moves, sedimentation etc.Existing method of testing and device cannot wholely be weighed the mechanical behavior of pipeline under loading in composite.How accurately to simulate the force-bearing situation of in-service pipeline, for revising Integrity Assessment method, provide test data, be pipeline management person and scientific research personnel needs the problem of solution badly.

Summary of the invention

The object of the invention is to invent a kind of in-service pipeline sedimentation analog detection method and device of simulating the true stressing conditions of defective pipeline, improving pipeline integrity evaluation result accuracy.

Technical scheme of the present invention is that the mode by carry nominal weight makes pipeline produce flexural deformation, the true stressing conditions of simulation defective pipeline, thereby judge the actual bearing capacity of pipeline, solve the loading problem that pipeline bearing capacity is tested under interior pressure and external applied load act on simultaneously.

By inventing designed a kind of in-service pipeline sedimentation analog detection method and device, from the scale of pipe-line spans mid point, observe pipeline deflection, the true stressing conditions of simulation defective pipeline, thereby judge the actual bearing capacity of pipeline, then by pressuring pump, to pipeline, apply internal pressure, the bearing capacity of testing conduit under interior pressure and bending load acting in conjunction.

Method of testing of the present invention is carried additionally nominal weight for elder generation precalculated position above pipeline, from the scale of pipe-line spans mid point, observes pipeline deflection; Then by pressuring pump, to pipeline, apply internal pressure, the bearing capacity of testing conduit under interior pressure and bending load acting in conjunction.

Method of testing: testing conduit 2 is lifted to bracing frame 4, according to the diameter adjustment bracing frame 4 of testing conduit 2 size and be fixed; Above testing conduit 2, nominal weight 3 is carried additionally in precalculated position, from the scale of testing conduit 2 span centres, observes pipeline deflection; Then by pressuring pump, to testing conduit 2, apply internal pressure, the bearing capacity of testing conduit 2 under interior pressure and bending load acting in conjunction.

Concrete steps are:

1) height of two end supports frame 4 is 1.2-1.5m, bracing frame 4 is along with testing conduit 2 pivots when crooked, guarantee that testing conduit 2 contacts with bracing frame 4 maintenance faces all the time in deformation process, avoid testing conduit 2 and bracing frame 4 contact position generation crimps;

2) testing conduit 2 total lengths are 12m-32m, span 10m-30m between two bracing frames 4, and 0.5m-1m is respectively extended at two ends, guarantees that there is transformation safe surplus at testing conduit 2 two ends in settling process, according to actual conditions capable of regulating elongation;

3) external load load mode, for carry additionally nominal weight 3 above testing conduit 2, needs to select concentrated loading or uniform loading according to test;

4) full-automatic pressuring pump, by being welded on water filling port 1 on testing conduit 2 to testing conduit 2 water fillings, applies internal pressure.

The in-service buried pipeline of the present invention is because sedimentation occurs bending and deformation, and the pipeline between settling zone can be equivalent to one section of sheet-metal duct beam.Based on this principle, design suitable support and load mode, the sedimentation of Reality simulation pipeline.

Analogue means is mainly comprised of four parts: bracing frame 4, nominal weight 3, sinking measuring stick, water filling port 1 and full-automatic pressuring pump.

By closed at both ends and at one end have testing conduit 2 that water filling port 1, the other end have a vent valve by two bracing frames 4 in two end supports, at the middle part of testing conduit 2, hang nominal weight 3; Full-automatic pressuring pump is connected with water filling port 1, and sinking measuring stick is placed in the subordinate edge of testing conduit 2.

The structure of support frame as described above 4 is shown in Fig. 2 and Fig. 3, and it is that top is arc, and bottom is rectangular slab, and by the two ends of hinged two sections of rectangular columns, each is connected with arc and rectangular slab; Wherein the diameter of arc intrados equates with the external diameter of testing conduit 2.

The present invention makes testing conduit 2 produce flexural deformation by the mode of carry nominal weight 3, solved the loading problem of pipeline bearing capacity test under interior pressure and external applied load act on simultaneously, for the Integrity Assessment of setting up based on strain provides method of testing, improved the accuracy of evaluating.

The present invention can carry out full-scale pipe sedimentation simulation, and can test the pipe sedimentation distortion of different tube diameters and length.China is more and more higher for detection and the evaluation requirements of pipeline, adopts the present invention can effectively verify the accuracy of evaluation, is with a wide range of applications.

Accompanying drawing explanation

Fig. 1 in-service pipeline sedimentation simulation test schematic diagram

Fig. 2 bracing frame front elevation

Fig. 3 bracing frame side view

1-water filling port 2-testing conduit wherein

3-nominal weight 4-bracing frame

Embodiment

Embodiment. this example is a test method and device, and it forms as Figure 1-3.

Analogue means is mainly comprised of bracing frame 4, nominal weight 3, sinking measuring stick, water filling port 1 and full-automatic pressuring pump four parts; By closed at both ends and at one end have testing conduit 2 that water filling 1, the other end have a vent valve by two bracing frames 4 in two end supports, at the middle part of testing conduit 2, hang nominal weight 3; Full-automatic pressuring pump is connected with water filling port 1, and sinking measuring stick is placed in the subordinate edge of testing conduit 2.

Method of testing: testing conduit 2 is lifted to bracing frame 4, according to the diameter adjustment bracing frame 4 of testing conduit 2 size and be fixed; Above testing conduit 2, nominal weight 3 is carried additionally in precalculated position, from the scale of testing conduit 2 span centres, observes pipeline deflection; Then by pressuring pump, to testing conduit 2, apply internal pressure, the bearing capacity of testing conduit 2 under interior pressure and bending load acting in conjunction.

Concrete steps are:

1) two end supports frame 4 height 1.5m, bracing frame 4, along with testing conduit 2 pivots when crooked, guarantees that testing conduit 2 contact with bracing frame 4 maintenance faces all the time in deformation process, avoids testing conduit 2 and bracing frame 4 contact position generation crimps;

2) testing conduit 2 total lengths are 32m, span 30m between two bracing frames 4, and 1m is respectively extended at two ends, guarantees that there is transformation safe surplus at testing conduit 2 two ends in settling process, according to actual conditions capable of regulating elongation;

3) external load load mode, for carry additionally nominal weight 3 above testing conduit 2, needs to select concentrated loading or uniform loading according to test.

4) full-automatic pressuring pump, by being welded on water filling port on test pipe to testing conduit 2 water fillings, applies internal pressure.

This example is through test of many times, and proving installation is simple, and method of testing is easy, has simulated the true stressing conditions of defective pipeline, has improved pipeline integrity evaluation result accuracy.

Claims (4)

1. an in-service pipeline sedimentation analog detection method, it is characterized in that testing conduit (2) lifting upper to two bracing frames (4), according to the size of the diameter adjustment bracing frame (4) of testing conduit (2) and be fixed; In precalculated position, testing conduit (2) top, carry additionally nominal weight (3), from the scale of testing conduit (2) span centre, observe pipeline deflection; Then by pressuring pump, to testing conduit (2), apply internal pressure, the bearing capacity of testing conduit (2) under interior pressure and bending load acting in conjunction.
2. a kind of in-service pipeline sedimentation analog detection method according to claim 1, is characterized in that concrete steps are:
1) the height 1.2-1.5m of two end supports frame (4), support pivots during along with pipe bending, guarantee that testing conduit (2) contacts with bracing frame (4) maintenance face all the time in deformation process, avoids testing conduit (2) and bracing frame (4) contact position generation crimp;
2) testing conduit (2) total length is 12m-32m, span 10m-30m between two bracing frames (4), 0.5m-1m is respectively extended at two ends, guarantees that there is transformation safe surplus at testing conduit (2) two ends in settling process, according to actual conditions capable of regulating elongation;
3) external load load mode, for carrying additionally nominal weight (3) in testing conduit (2) top, needs to select concentrated loading or uniform loading according to test;
4) full-automatic pressuring pump, by being welded on water filling port (1) on testing conduit (2) to testing conduit (2) water filling, applies internal pressure.
3. right to use requires an in-service pipeline settlement simulation test device for method described in 1, it is characterized in that it is mainly comprised of four parts: bracing frame (4), nominal weight (3), sinking measuring stick, water filling port (1) and full-automatic pressuring pump;
By closed at both ends and at one end have testing conduit (2) that water filling port (1), the other end have a vent valve by two bracing frames (4) in two end supports, at the middle part of testing conduit (2), hang nominal weight (3); Full-automatic pressuring pump is connected with water filling port (1), and sinking measuring stick is placed in the subordinate edge of testing conduit (2).
4. a kind of in-service pipeline settlement simulation test device according to claim 3, the structure that it is characterized in that support frame as described above (4) is that top is arc, bottom is rectangular slab, and by the two ends of hinged two sections of rectangular columns, each is connected with arc and rectangular slab; Wherein the diameter of arc intrados equates with the external diameter of testing conduit (2).
CN201110124685.7A 2011-05-13 2011-05-13 In-service pipeline settlement simulation test method and device CN102778395B (en)

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CN102778395B true CN102778395B (en) 2014-04-02

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Publication number Priority date Publication date Assignee Title
CN103439102A (en) * 2013-09-02 2013-12-11 上海开维喜阀门集团有限公司 Large-scale external load bending test device for pipeline ball valve test
CN105571951B (en) * 2016-01-28 2018-04-06 无锡华毅管道有限公司 Interior hydraulic pressure and external load the joint bearing test equipment and test method of buried rigid pressure pipeline
CN109211679A (en) * 2018-10-29 2019-01-15 四川欧宝路管业有限责任公司 A kind of plastic tube anti-pressure ability test device

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JP3164523B2 (en) * 1996-12-26 2001-05-08 日本碍子株式会社 Internal water pressure strength test method for bottomed cylinder
US7246527B2 (en) * 2004-11-12 2007-07-24 The Boeing Company E-fixture
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
CN201724687U (en) * 2010-05-07 2011-01-26 上海启鹏工程材料科技有限公司 Device for measuring ground settlement
CN202166570U (en) * 2011-05-13 2012-03-14 中国石油天然气股份有限公司 In-service pipe settlement simulation test device

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