CN203099097U - Device for preventing and curing permafrost region pipe body thaw collapse by utilizing flexible limit tape device - Google Patents
Device for preventing and curing permafrost region pipe body thaw collapse by utilizing flexible limit tape device Download PDFInfo
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- CN203099097U CN203099097U CN 201220739286 CN201220739286U CN203099097U CN 203099097 U CN203099097 U CN 203099097U CN 201220739286 CN201220739286 CN 201220739286 CN 201220739286 U CN201220739286 U CN 201220739286U CN 203099097 U CN203099097 U CN 203099097U
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Abstract
The utility model provides a device for preventing and curing permafrost region pipe body thaw collapse by utilizing a flexible limit tape device. The device is characterized in that two sides of a buried pipeline (1) are symmetrically and respectively buried with a fixed plate (2), four flexible tapes (4) are fixed between the two opposite fixed plates (2) through screws (3), two flexible tapes (4) are arranged between the upper portion of the first fixed plate (2) and the second fixed plate (2) in a cable-stayed mode, two flexible tapes (4) are arranged between the upper portion of the second fixed plate (2) and the first fixed plate (2) in a cable-stayed mode, and the buried pipeline (1) is placed in a crossed diamond grid formed by the four flexible tapes (4); and diamond grid intersection points on two sides of the buried pipeline (1) are connected and fixed through bolts (6) and connecting plates (5). The device for preventing and curing the permafrost region pipe body thaw collapse by utilizing the flexible limit tape device does not need movable components, is free of maintenance, has good reliability and does not consume electricity energy, and is suitable for permafrost region buried pipelines.
Description
Technical field
The utility model is a kind of device that utilizes flexible spacing belting control permafrost district body thaw collapse.Relate to the pipe-line system technical field.
Background technique
Along with China's rapid economic development, to the also increase day by day of demand of petroleum resources.As a kind of economy, safely, uninterruptedly long distance oil-gas means of delivery, oil and gas pipes is being obtained huge development in nearly decades.But because a lot of petroleum resources is contained in permafrost Han Qu, in order to satisfy the demand of economic development to petroleum resources, increasing pipe-line will inevitably be built in the permafrost district.The domestic and international at present crude oil pipeline of building at permafrost region, the representative alaskan pipeline that the U.S. is arranged, the unconcerned large pipeline of Canadian promise Man Weiersi pipeline and China.Permafrost district oil and gas pipes mainly adopt bury ground or built on stilts mode lay.But consider that based on safety, economic dispatch factor buried is more general system of laying, all is that this kind mode is laid as promise Man Weiersi pipeline and unconcerned large pipeline.Bury the ground mode when carrying out pipe laying but adopt, will unavoidably change surface configuration, vegetation destruction causes that the ground permafrost upper limit changes and the decline and the thawing of permafrost.In addition, in pipeline operation process, will constantly melt frozen soil on every side during the projecting frozen soils temperature of the defeated temperature of pipe, form and melt circle, and then cause body that inhomogeneous thaw collapse takes place, destroy pipeline stability, threat tube security of operation.At present, the thaw collapse risk is a global engineering roadblock for the safe operation of pipeline, does not still have the generation that effective method and measure prevent and treat body thaw collapse problem.
The thaw collapse risk of pipeline and the thaw collapse of frozen soil foundation are closely related, when the pipeline ground is positioned at weak thaw collapse or not when the gravel, coarse sands layer of thaw collapse and sial, and base stabilization, there is very little risk for the thaw collapse of body.And when the pipeline ground was layed in strong thaw collapse zone (ice-rich permafrost, water ice frozen soil and contain native ice sheet), frozen soil caused pipe sedimentation after melting easily, needed to consider take corresponding control measures.Especially for be the thaw collapse coefficient when the pipeline ground greater than 25 contain native ice sheet the time, be stream after frozen soil melts and mould state, lose mechanical bearing capacity fully to pipeline, thereby cause pipeline to occur a large amount of sedimentations at short notice, causing that very easily pipeline breaks owing to the thaw collapse amount is excessive, is the most dangerous geological state.The thaw collapse problem of pipeline mainly comes from two aspects, and the one, externally dispel the heat continually in the pipeline running, cause occurring on every side melting circle, melt soil and occur causing the body sedimentation above the deflection of expection.The 2nd, frozen soil melts the mechanical bearing capacity in back and sharply reduces, even loses bearing capacity, can't realize the effective support to pipeline.The thaw collapse problem of pipeline is because externally heat radiation continually of pipeline causes due to the strong on every side thaw collapse frozen soil thawing essentially.Therefore, pipeline is conducted the heat that take suitable measure to export to again in the atmosphere, the freezing plateau state of keeping the pipeline ground is only and ensures the basic of pipeline stabilization.In order to prevent or slow down the thermal effect of permafrost district buried pipeline, once adopted cooling machine set abroad to carrying out mechanical refrigeration around the pipeline, to reduce the pipeline heat to the influence of frozen soil on every side.Its deficiency is not only will consume a lot of electric energy, does not utilize environmental protection and energy saving, and operation and maintenance cost is also quite high, unreasonable economically.In addition, this measure can't be used in the zone that does not have the stable power source.Therefore, be necessary to develop a kind of method and apparatus that is specifically applied to the buried pipeline thaw collapse control of permafrost district, and have advantages such as the consumed power of need not, non-maintaining, environmental protection and energy saving, thoroughly solve the permafrost region buried pipeline in running since around frozen soil melt the thaw collapse problem that is caused.
The model utility content
The purpose of this utility model be a kind of movement-less part of design, non-maintaining, have good reliability, a device of the flexible spacing belting control permafrost of the utilization that is applicable to permafrost zone buried pipeline of consumed power district body thaw collapse.
The utility model utilizes flexible band to form a rhombus stop zone at pipe surface, about the restriction conduit, the left and right displacement amplitude, thereby reaches the purpose that prevents the pipeline thaw collapse.Bury a fixed plate 2 underground in each symmetry of the both sides of buried pipeline 1, fix 4 flexibilities by screw 3 between the two relative fixed plates 2 and be with 4, tiltedly draw two flexibilities to be with 4 between the top of first fixed plate 2 and second fixed plate 2, tiltedly draw two flexibilities to be with 4 between the top of second fixed plate 2 and first fixed plate 2, place these 4 flexibilities with in 4 networks that intersect buried pipeline 1; Network intersection point place is connected and fixed by bolt 6 and connecting plate 5 in buried pipeline 1 both sides; Flexibility is with 4 to be the wear-resisting band of high-strength flexible, after fixedly connected tightening, forms a rhombus stop zone on buried pipeline 1 surface.About the restriction conduit, the left and right displacement amplitude, thereby reach the purpose that prevents the pipeline thaw collapse.
Permafrost district pipeline thaw collapse control system principle schematic representation such as Fig. 1, Fig. 2 and shown in Figure 3 of relating in the utility model.Wherein 1 is buried pipeline, and 2 is fixed plate, and 3 is screw, and 4 is flexible band, and 5 is connecting plate, and 6 is bolt.Bury a fixed plate 2 underground in each symmetry of the both sides of buried pipeline 1, fix 4 flexibilities by screw 3 between the two relative fixed plates 2 and be with 4, tiltedly draw two flexibilities to be with 4 between the top of first fixed plate 2 and second fixed plate 2, tiltedly draw two flexibilities to be with 4 between the top of second fixed plate 2 and first fixed plate 2, place these 4 flexibilities with in 4 networks that intersect buried pipeline 1; Network intersection point place is connected and fixed by bolt 6 and connecting plate 5 in buried pipeline 1 both sides.
Wherein, fixed plate 2 is that rectangular is tabular, and below band pyramidal projections is fixed up after being convenient to penetrate pipeline below permafrost soil layer;
Flexibility is with 4 to be the wear-resisting band of high-strength flexible, after fixedly connected tightening, forms a rhombus stop zone at pipe surface;
Connecting plate 5 is with 4 to couple together as two flexibilities of naming a person for a particular job of rhombus stop zone;
The utility model compared with prior art has following advantage: 1, efficiently solve permafrost district pipeline because of the thaw collapse problem that frozen soil thawing is on every side caused, ensured the safe operation of permafrost region pipeline; 2, can realize effective control of pipeline thaw collapse in full season; 3, have good and economic, need not consumed power, movement-less part, have characteristics such as non-maintaining, energy-saving and environmental protection, reliability height and applicability be good; 4, easy construction can use reliably and with long-term.
The utility model can be applicable to the thaw collapse risk control that the ground oil and gas pipes is buried in the permafrost district.
Description of drawings
Fig. 1 permafrost district pipeline thaw collapse protection method front elevational schematic
Fig. 2 permafrost district pipeline thaw collapse protection method schematic side view
Fig. 3 permafrost district pipeline thaw collapse protection method schematic top plan view
1-buried pipeline, 2-fixed plate wherein
3-screw 4-flexibility band
5-connecting plate, 6-bolt
Embodiment
Embodiment. this example is to bury a fixed plate 2 underground in each symmetry of the both sides of buried pipeline 1, fix 4 flexibilities by screw 3 between the two relative fixed plates 2 and be with 4, tiltedly draw two flexibilities to be with 4 between the top of first fixed plate 2 and second fixed plate 2, tiltedly draw two flexibilities to be with 4 between the top of second fixed plate 2 and first fixed plate (2), place these 4 flexibilities with in 4 networks that intersect buried pipeline 1; Network intersection point place is connected and fixed by bolt 6 and connecting plate 5 in buried pipeline 1 both sides; Flexibility is with 4 to be the wear-resisting band of high-strength flexible, after fixedly connected tightening, forms a rhombus stop zone on buried pipeline 1 surface.Utilize flexible band to form a rhombus stop zone, about the restriction conduit, the left and right displacement amplitude, thereby reach the purpose that prevents the pipeline thaw collapse at pipe surface.The base area is surveyed and be found that, this section is zone, permafrost marsh, and pipeline directly is layed in the farinose argillic horizon of strong thaw collapse, and thickness of clay soil is greater than 10m, and the thaw collapse coefficient is full freezing soil greater than 10, and water content is higher than 40%, belongs to strong thaw collapse location.This section pipe material is for being the X65 steel, and caliber is 813mm, and pipe thickness is 16mm, and pipe top buried depth is 1.8m, and the defeated mean temperature of pipe is 10 ℃.
For exploitativeness and the Economy of considering protection method, when this zone duct being carried out thaw collapse improvement, consider the strong point of point as pipeline implemented in measure, utilize the strong point that the supporting effect of pipeline is guaranteed that the sedimentation of expecting does not take place to surpass pipeline.Utilize pipe stress analysis software CAESAR II to carry out stress analysis, and check standard according to ASMA B31.4, and determine this section pipeline when the strong point span time less than 20m, the maximum stress that pipeline bore is less than allowable stress, requirement up to specification, pipeline are safe.On this basis,, determine the load that the strong point need bear and the width and the angle of rhombus limiting area according to the power of tightening of the stressing conditions of pipeline and flexible band.
By calculating, the length of determining fixed plate 2 is 4m, and width is 1m, and thickness is 0.1m; It is 1m that flexibility is with 4 width; Rhombus stop zone acute angle is 50 °, and the obtuse angle is 130 °; Connecting plate 5 length are 1m, and width is 0.08m, and thickness is 0.02m; Fixed plate spacing 3m.Can realize effective support to pipeline.
Specific implementation process is as follows:
Choose exemplary segment 100m, every interval 20m establishes a strong point, digs two square openings in pipeline bilateral symmetry position, gos deep into the permafrost soil layer, inserts fixed plate; Treat fixed plate freeze fixing after, according to the angle of rhombus stop zone flexibility is with fixedly connected, screw and bolt symmetric arrangement.Work progress is chosen in as far as possible and carries out winter, and winter, the frozen soil area was bigger, is convenient to construction.
This example is through test, and the thaw collapse problem does not take place the exemplary segment pipeline.The thaw collapse problem of the permafrost marsh zone duct that the enforcement of this measure effectively solves has ensured the safe operation of pipeline.
Claims (3)
1. one kind is utilized flexible spacing belting to prevent and treat the device of permafrost district body thaw collapse, it is characterized in that burying a fixed plate (2) underground in each symmetry of the both sides of buried pipeline (1), fix 4 flexible bands (4) by screw (3) between the two relative fixed plates (2), tiltedly draw two flexible bands (4) between the top of first fixed plate (2) and second fixed plate (2), tiltedly draw two flexible bands (4) between the top of second fixed plate (2) and first fixed plate (2), buried pipeline (1) is placed in the network of these 4 flexible bands (4) intersection; Network intersection point place is connected and fixed by bolt (6) and connecting plate (5) in buried pipeline (1) both sides.
2. a kind of device that utilizes flexible spacing belting control permafrost district body thaw collapse according to claim 1 is characterized in that described fixed plate (2) is tabular for rectangular, below band pyramidal projections; Screw (3) is fixed on flexibility band (4) on the fixed plate (2), and the pipeline bilateral symmetry is arranged.
3. a kind of device that utilizes flexible spacing belting control permafrost district body thaw collapse according to claim 1, it is characterized in that described flexible band (4) is the wear-resisting band of high-strength flexible, by connecting plate (5) fixedly connected with bolt (6) tighten after, form a rhombus stop zone at pipe surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220739286 CN203099097U (en) | 2012-12-28 | 2012-12-28 | Device for preventing and curing permafrost region pipe body thaw collapse by utilizing flexible limit tape device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220739286 CN203099097U (en) | 2012-12-28 | 2012-12-28 | Device for preventing and curing permafrost region pipe body thaw collapse by utilizing flexible limit tape device |
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| CN203099097U true CN203099097U (en) | 2013-07-31 |
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| CN 201220739286 Expired - Lifetime CN203099097U (en) | 2012-12-28 | 2012-12-28 | Device for preventing and curing permafrost region pipe body thaw collapse by utilizing flexible limit tape device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899849A (en) * | 2012-12-28 | 2014-07-02 | 中国石油天然气股份有限公司 | Method and device for controlling thaw settlement of pipes in permafrost regions by flexible limit tapes |
-
2012
- 2012-12-28 CN CN 201220739286 patent/CN203099097U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899849A (en) * | 2012-12-28 | 2014-07-02 | 中国石油天然气股份有限公司 | Method and device for controlling thaw settlement of pipes in permafrost regions by flexible limit tapes |
| CN103899849B (en) * | 2012-12-28 | 2015-12-23 | 中国石油天然气股份有限公司 | A kind of method and apparatus utilizing flexible limit belting to prevent and treat Permafrost Area body thaw collapse |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211104 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PETROCHINA Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |