CN205226898U - Flexible crack arrester of steel sleeve - Google Patents
Flexible crack arrester of steel sleeve Download PDFInfo
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- CN205226898U CN205226898U CN201520981774.7U CN201520981774U CN205226898U CN 205226898 U CN205226898 U CN 205226898U CN 201520981774 U CN201520981774 U CN 201520981774U CN 205226898 U CN205226898 U CN 205226898U
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- pipeline
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- crack arrester
- stiffening
- flexible crack
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Abstract
The utility model discloses a flexible crack arrester of steel sleeve belongs to oil and gas conveying pipeline fracture control field, through this crack arrester of installation on the pipeline, can effectively prevent the long -range extension of high steel level pipeline ductility crackle, realizes ductile fracture's flexible crack arrest. The utility model relates to a flexible crack arrester of steel sleeve mainly contains reinforcing ring, fastening end connecting plate, strengthening rib and connecting bolt. At first utilize the cutting machine with the pipeloop cutting for two upper and lower reinforcing rings, to incision and length direction left and right sides finished edge after the cutting. Lay two upper and lower reinforcing rings at high steel level pipeline steel pipe surface welding fastening end connecting plate and strengthening rib. Lay at the reinforcing ring of being responsible for the line steel pipe through bolted connection is fixed, form the flexible crack arrester of steel sleeve device. To the pipeline of new construction, this crack arrester can be directly carries out manufacturing at the pipeline scene. To the pipeline of having gone into operation, the installation of this crack arrester need not cut the pipeline, and the installation is simple, and the gas transmission service is uninterrupted in the installation.
Description
[technical field]
The utility model belongs to pipe-line Fracture Control field, relates to the flexible crack arrester of a kind of steel bushing.
[background technique]
Rock gas is a kind of clean energy resource, is also a kind of inflammable, explosive danger medium, usually adopts pipeline transport.Pipeline transport has large, continuous, rapid, economic, the safe and reliable feature of transport volume.But pipeline is in long service process, owing to being subject to strata pressure, corrosion and fatigue, exterior mechanical damage etc., be easy to cause the accidents such as pipeline cracking, leakage to occur.High pressure gas pipeline, once long-range cracking will cause huge disaster and loss, therefore must ensure the safe operation of pipeline.Following 10 to 20 years, continuation is kept the strong growth impetus to the demand of clear energy sources rock gas by China, in order to improve the Economy of pipeline transport, the development trend of natural gas line is Hi-grade steel, high pressure, heavy caliber, large wall thickness, large throughput rate, to improve transfer efficiency, reducing the construction costs, meet the growing market demand.Quickly, X70 rank steel pipe is in transfering natural gas from the west to the east one line successful Application, and the second west to east gas pipeline project pipework adopts the steel pipe of X80 rank on a large scale for China's natural gas line pipe line steel pipe development in recent years.Current China is actively promoting the engineer applied of the contour Grade of X90, X100.
The employing of the raising of natural-gas transfer pipeline grade of steel, caliber, design ratio and high pressure, rich gas delivery technology, substantially increases operation benefits, also has higher requirement to pipe safety simultaneously.Gas pipeline is once cracking, and pipe inner high voltage gas can not be emptying at once, but respectively to produce a decompression wave to both sides by point of rupture and distally propagate.Because gas decompression velocity of wave is lower than crack propagation velocity, crack tip will keep lasting high-stress state, the high-speed expansion that crackle also can continue, and then causes the long-range of gas pipeline ductility crackle to be expanded.Existing full-scale gas blast test result shows: for Hi-grade steel pipe line steel (X80 and above pipe line steel), it is difficult to rely on self toughness to carry out crack arrest, and this has become serious threat pipeline safety and has restricted the bottleneck problem of Hi-grade steel pipe line steel application.
When the toughness of pipe line steel self can not ensure to stop Ductile crack growth, need adopt some external mechanical devices, namely crack arrester (CrackArrestor) prevents, stops the ductility crackle long-range of pipeline to expand.Different according to the installation method on gas pipeline, crack arrester can be divided into two classes: overall crack arrester and non-integral crack arrester.Overall crack arrester forms by being different from the heavy wall of main pipeline mechanical property and physical dimension or high tenacity pipeline section or pipe ring usually, becomes a part for pipeline.Existing pipeline is installed overall crack arrester need carry out cutting to pipeline and again weld, to expend time in and cost is high.In addition, there is process engineering difficulty in production high tenacity thick walled steel tube, need consider coupling and the feasibility of welds problem of different stage, wall thickness steel tube.The installation of non-integral crack arrester is then relatively simple, can be used for built pipeline and newly-built pipeline.In addition, if crack arrest suddenly can cause crackle to produce ring cutting (ringoff) when entering crack arrester.Namely steel pipe is gone out groove by pipe inner high voltage air-flow, and steel pipe circumferentially ftractures, thus causes serious consequence to pipeline and surrounding environment, therefore should promote crackle flexible crack arrest during crack arrester design.
[model utility content]
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, provides a kind of steel bushing flexible crack arrester, and this crack arrester is used for the long-range expansion effectively stoping Hi-grade steel pipe line steel pipeline ductile fracture line, realizes the flexible crack arrest of pipeline ductile fracture.
For achieving the above object, the utility model is achieved by the following technical solutions:
The flexible crack arrester of steel bushing, comprises two the semicircle stiffening rings being arranged on pipeline steel tube outer surface; Two semicircle stiffening rings are oppositely arranged, and the fastening end of two stiffening rings is all welded to connect plate, and the inner side of the connecting plate of two stiffening rings is relative, and is bolted to connection.
The utility model further improves and is:
The outside welding stiffening rib of described connecting plate, the other end of stiffening rib is welded on the outside of stiffening ring.
Described bolt adopts equilong threaded stud, equilong threaded stud by with the coordinating of packing ring and nut, be oppositely arranged two connecting plates are fixedly connected with.
Described connecting plate adopts X80 Pipeline Steel Plate.
The both sides port of described stiffening ring is processed with internal groove, realizes the flexible crack arrest of crackle, avoids main line ring cutting, steel pipe radially ftractures.
Described internal groove angle is 15 ° ± 5 °.
Described stiffening ring material adopts external diameter 1219mm, with the pipeloop manufacturing of main line steel pipe with grade of steel; The wall thickness of stiffening ring, external diameter and main line wall thickness, external diameter are identical, and the length of stiffening ring is more than or equal to main line outer diameter of steel pipes.
Compared with prior art, the utility model has following beneficial effect:
First the utility model utilizes cutting machine pipeloop to be cut into upper and lower two stiffening rings, processes, finished edge after cutting to otch and the length direction left and right sides.Upper and lower two stiffening rings are placed in Hi-grade steel pipeline steel tube outer surface, welding fastening end connecting plate and stiffening rib.Be bolted the stiffening ring being fixedly placed in main line steel pipe, form the flexible crack arrester of steel bushing.For the new pipeline built, this crack arrester directly can carry out manufacturing at pipeline scene.For the pipeline of having gone into operation, the installation of this crack arrester does not need to cut pipeline, installs simple, and in installation process, gas transmission service is not interrupted.The utility model is mainly applicable to 0.72 and following design ratio, the pipeline of external diameter 1219mm, X80 and above Hi-grade steel pipeline steel tube and gas storage.By installing this crack arrester on pipeline, the long-range of Hi-grade steel pipeline ductility crackle effectively can be stoped to expand, realize the flexible crack arrest of ductile fracture.
[accompanying drawing explanation]
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the A direction view of Fig. 1;
Fig. 3 is the B direction view of Fig. 1;
Fig. 4 is the partial enlarged drawing at I place in Fig. 1;
Fig. 5 is the partial enlarged drawing at II place in Fig. 3;
Fig. 6 is the welded structure schematic diagram of the utility model stiffening ring and connecting plate;
Fig. 7 is the welded structure schematic diagram of the utility model stiffening rib;
Fig. 8 is the structural representation of the utility model stiffening ring two ends internal groove.
Wherein: 1 is connecting plate; 2 is equilong threaded stud; 3 is packing ring; 4 is nut; 5 is stiffening rib; 6 is stiffening ring.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail:
See Fig. 1 to Fig. 8, the utility model comprises two the semicircle stiffening rings 6 being arranged on pipeline steel tube outer surface; Two semicircle stiffening rings 6 are oppositely arranged, and the fastening end of two stiffening rings 6 is all welded to connect plate 1, and the inner side of the connecting plate 1 of two stiffening rings 6 is relative, and is bolted to connection.The outside welding stiffening rib 5 of connecting plate 1, the other end of stiffening rib 5 is welded on the outside of stiffening ring 6.Bolt adopts equilong threaded stud 2, equilong threaded stud 2 by with the coordinating of packing ring 3 and nut 4, be oppositely arranged two connecting plates 1 are fixedly connected with.Connecting plate adopts X80 Pipeline Steel Plate.The both sides port of stiffening ring 6 is processed with internal groove, realizes the flexible crack arrest of crackle, avoids main line ring cutting, steel pipe radially ftractures.Internal groove angle is 15 ° ± 5 °.Stiffening ring material adopts external diameter 1219mm, with the pipeloop manufacturing of main line steel pipe with grade of steel; The wall thickness of stiffening ring, external diameter and main line wall thickness, external diameter are identical, and the length of stiffening ring is more than or equal to main line outer diameter of steel pipes.Its main design content is as follows:
(1) material of stiffening ring.According to the design criterion of PRCI, the tensile strength of stiffening ring material and thickness must meet BTC curve.This patent stiffening ring material recommends to adopt external diameter 1219mm, with main line steel pipe with the manufacturing of grade of steel pipeloop.For the pipeline built, stiffening ring can be on-the-spot at pipeline construction, directly utilizes the cutting of main line steel pipe to manufacture, without the need to repeating service check.For the pipeline of having gone into operation, then the low value that storehouse can be utilized to preserve easily consumes tubing manufacture, without the need to again customized, and consumptive material consuming time.
(2) size of stiffening ring.The wall thickness of stiffening ring, external diameter and main line wall thickness, external diameter are identical, the length >=main line outer diameter of steel pipes of stiffening ring.During installation, stiffening ring diameter must not produce overgauge, is blind-mate with main line outer wall, installs to the certain prestressing force of main line steel pipe.Be 1219mm for external diameter, wall thickness is the main line of 30.6mm, and stiffening ring is that the straight-seam pipes of 1219mm is done along bilateral center line cutting by external diameter, and the wall thickness of stiffening ring is 30.6mm, and principal length is 1300mm, and overall length is 1468mm, specifically sees Fig. 1.
(3) shape of stiffening ring.Stiffening ring length direction profile design is internal groove, specifically sees Fig. 8, groove angle 15 ° ± 5 °.Wall thickness by this design stiffening ring and the restraining force to steel pipe increase gradually, thus realize the flexible crack arrest of crackle, and avoid main line ring cutting, steel pipe radially ftractures.
(4) material of fastening connecting plate.Pipe line steel material X80 has lower yield ratio and higher uniform elongation, has certain intensity and toughness, and self crack arrest characteristic is better, therefore the utility model fastening connecting plate material selection X80 Pipeline Steel Plate.
(5) welding of stiffening ring.Stiffening ring incision and fastening connecting plate weld together, and weld stiffening rib.The groove of cut end and welding procedure are carried out in strict accordance with the welding procedure specification of this pipeline requirements, and postwelding need carry out ultrasound examination and Magnetic testing simultaneously.
(6) connection of bolt.Adopting during bolton answers Bilateral Symmetry to carry out.
(7) installation of crack arrester.First utilize the mounting point of tape measure determination crack arrester, utilize chalk or oil pen to determine position.Stiffening ring is placed in the outer surface of main line, welds fastening section of connecting plate and stiffening rib, be bolted fixing, form steel bushing crack arrester device, local restriction effect is produced to main line steel pipe.
Be 1219mm for external diameter, wall thickness is the gas storage X80 pipeline steel tube of 30.6mm, according to the flexible crack arrester device of a kind of steel bushing of the utility model Patent design, the X80 straight-seam pipes that stiffening ring is 1219mm by external diameter is done along bilateral center line cutting, the wall thickness of stiffening ring is 30.6mm, principal length is 1300mm, and overall length is 1468mm, specifically sees Fig. 1.
Above content is only and technological thought of the present utility model is described; protection domain of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technological scheme basis is done, within the protection domain all falling into the utility model claims.
Claims (7)
1. the flexible crack arrester of steel bushing, is characterized in that, comprise two the semicircle stiffening rings (6) being arranged on pipeline steel tube outer surface; Two semicircle stiffening rings (6) are oppositely arranged, and the fastening end of two stiffening rings (6) is all welded to connect plate (1), the inner side of the connecting plate (1) of two stiffening rings (6) is relative, and is bolted to connection.
2. the flexible crack arrester of steel bushing according to claim 1, is characterized in that, outside welding stiffening rib (5) of described connecting plate (1), the other end of stiffening rib (5) is welded on the outside of stiffening ring (6).
3. the flexible crack arrester of steel bushing according to claim 1 and 2, it is characterized in that, described bolt adopts equilong threaded stud (2), equilong threaded stud (2) by with the coordinating of packing ring (3) and nut (4), be oppositely arranged two connecting plates (1) are fixedly connected with.
4. the flexible crack arrester of steel bushing according to claim 1 and 2, it is characterized in that, described connecting plate adopts X80 Pipeline Steel Plate.
5. the flexible crack arrester of steel bushing according to claim 1 and 2, it is characterized in that, the both sides port of described stiffening ring (6) is processed with internal groove, realizes the flexible crack arrest of crackle, avoids main line ring cutting, steel pipe radially ftractures.
6. the flexible crack arrester of steel bushing according to claim 5, it is characterized in that, described internal groove angle is 15 ° ± 5 °.
7. the flexible crack arrester of steel bushing according to claim 1, it is characterized in that, described stiffening ring material adopts external diameter 1219mm, with the pipeloop manufacturing of main line steel pipe with grade of steel; The wall thickness of stiffening ring, external diameter and main line wall thickness, external diameter are identical, and the length of stiffening ring is more than or equal to main line outer diameter of steel pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520981774.7U CN205226898U (en) | 2015-12-01 | 2015-12-01 | Flexible crack arrester of steel sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520981774.7U CN205226898U (en) | 2015-12-01 | 2015-12-01 | Flexible crack arrester of steel sleeve |
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| CN205226898U true CN205226898U (en) | 2016-05-11 |
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| CN201520981774.7U Active CN205226898U (en) | 2015-12-01 | 2015-12-01 | Flexible crack arrester of steel sleeve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402606A (en) * | 2015-12-01 | 2016-03-16 | 中国石油天然气集团公司 | Flexible crack stopper for steel sleeve |
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- 2015-12-01 CN CN201520981774.7U patent/CN205226898U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402606A (en) * | 2015-12-01 | 2016-03-16 | 中国石油天然气集团公司 | Flexible crack stopper for steel sleeve |
| CN105402606B (en) * | 2015-12-01 | 2017-10-17 | 中国石油天然气集团公司 | A kind of flexible crack arrester of steel bushing |
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