CN202990906U - Vortex-induced vibration suppression device with rotatable spiral strakes - Google Patents
Vortex-induced vibration suppression device with rotatable spiral strakes Download PDFInfo
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- CN202990906U CN202990906U CN 201320008428 CN201320008428U CN202990906U CN 202990906 U CN202990906 U CN 202990906U CN 201320008428 CN201320008428 CN 201320008428 CN 201320008428 U CN201320008428 U CN 201320008428U CN 202990906 U CN202990906 U CN 202990906U
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- marine riser
- induced vibration
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Abstract
The utility model relates to a vortex-induced vibration suppression device with rotatable spiral strakes. The device is formed by combining multiple basic units in series along with the axis direction of a marine riser, wherein each basic unit comprises two rotating modules, a sleeve and three spiral strakes; each rotating module consists of an inner ring, a cylindrical roller and an outer ring; each sleeve and the corresponding spiral strakes are integrated and are molded by a plastic mold at a time; each two rotating modules are respectively assembled at the upper and lower ends of the corresponding sleeve; the inner rings of the rotating modules are fastened and connected with the marine riser by bolts; each sleeve is sleeved on the outer rings of the corresponding rotating modules; and the free rotation of the spiral strakes around the marine riser is realized through the rotating modules. The vortex-induced vibration suppression device is simple in structure, reliable in performance and convenient in field installation, can freely rotate, and can effectively suppress vortex-induced vibration caused by incoming flow in any direction so as to reduce the influence of the vibration on the fatigue life of the marine riser.
Description
Technical field
The utility model belongs to marine riser facility laying technology field, is specifically related to a kind of rotatable helical strake vortex induced vibration inhibiting device.
Background technology
The exploitation of deep water hydrocarbon field has become the inexorable trend of current exploratory engineering of off-shore petroleum/gas reservoir and exploitation, relates to the pipelines such as marine riser, production riser and suspended span woven hose in recovery process, and the cost of these pipelines accounts for the over half of whole DSPS cost.Off-shore pipeline ambient conditions of living in is abominable, and stressed complexity especially when wave, the ocean current of certain flow rate are flowed through off-shore pipeline, will produce periodic vortex shedding, bring out the vibration of pipeline.When the vortex shedding frequency approaches or equals a certain intrinsic frequency of off-shore pipeline, Oscillation Amplitude will sharply increase, and form resonance, finally cause fatigue failure.In case off-shore pipeline lost efficacy, and not only caused marine serious accident, caused huge economic loss, also will cause catastrophic destruction to marine environment.
The fatigue failure that off-shore pipeline is caused in order to reduce vortex-induced vibration extends off-shore pipeline application life, and existing method normally directly is fixed on vortex-induced vibration suppression device on off-shore pipeline.Most vortex-induced vibration suppression device can not rotate, if realize rotation, the horizontal force with greatly weakening ocean current pipeline being applied strengthens the vortex-induced vibration inhibition.Only have at present public notification period patent CN 102071883 A(to adopt the submerged riser vortex-induced vibration suppression device of rotatable radome fairings) and the submerged riser vortex-induced vibration device of the imitative fishtail type radome fairing of public notification period patent CN 102134972 A() in the device mentioned can realize rotation around standpipe, but still be subject to the restriction of incoming flow angle, can not tackle arbitrarily angled incoming flow fully.
Summary of the invention
In order to overcome shortcomings and deficiencies of the prior art, the utility model provides a kind of simple in structure, dependable performance, on-the-spot easy for installation can tackling to come arbitrarily the rotatable helical strake vortex induced vibration inhibiting device of flow path direction for marine riser.
To achieve these goals, the utility model adopts following technical scheme:
A kind of rotatable helical strake vortex induced vibration inhibiting device is combined by the coastal foreign standpipe axis direction tandem of a plurality of elementary cells, and described elementary cell is comprised of two rotary modules, a sleeve and three blocks of spiral strakes.Rotary module comprises inner ring, cylindrical roller, outer ring.Inner ring is comprised of two semi-ring steel components of symmetry, its external surface processing column roller groove, and inner ring is enclosed within on marine riser from both sides, uses bolt to connect between two semi-rings.The cylindrical roller groove is half-terete groove, and cylindrical roller is positioned in the cylindrical roller groove of inner ring.The outer ring also is comprised of two semi-ring steel components of symmetry, within it Surface Machining cylindrical roller annular groove.Outer ring sleeve is placed in the cylindrical roller annular groove cylindrical roller in the inner ring outside, uses bolt to connect between two semi-rings, and limits the axial slip of outer ring by the axial retention sheet.It is molded that sleeve and spiral strake are that integral body adds, and sleeve directly is sleeved on the outer ring of rotary module, each equipped rotary module of the two ends up and down of each sleeve.
Described sleeve is coaxial with marine riser, and sleeve has three blocks of spiral strakes outward, and three spiral strake rotating Vortex 30 degree are to 60 degree.
The utility model is owing to taking above technical scheme, and it has the following advantages:
1, the utility model can be realized rotating freely, and its fluoran stream surface is long-pending, and to compare fixed helical strake vortex induced vibration inhibiting device little, and then weakened ocean current to the horizontal force that marine riser applies, and strengthened the vortex-induced vibration inhibition;
2, the utility model can freely be adjusted the distance between each elementary cell according to on-site actual situations, to reach optimal inhibition effect;
3, the utility model can be tackled the vortex-induced vibration that comes arbitrarily the flow path direction ocean current to cause, and is applicable to flow to the marine site that frequently changes, and has enlarged the engineering scope of application.
Description of drawings
Fig. 1 is the utility model device perspective view
Fig. 2 is the utility model device rotary module inner ring and single cylindrical roller perspective view
Fig. 3 is the utility model device rotary module outer ring perspective view
Fig. 4 is the utility model device rotary module perspective view
Fig. 5 is the utility model device sleeve and spiral strake perspective view
Wherein: 1. marine riser; 2. inner ring; 3. outer ring; 4. axial retention sheet; 5. sleeve; 6. spiral strake; 7. cylindrical roller groove; 8 bolts; 9. cylindrical roller; 10. cylindrical roller annular groove.
The specific embodiment
Below in conjunction with accompanying drawing, concrete enforcement of the present utility model is further described.
The utility model is that the coastal foreign standpipe axis direction tandem of a plurality of elementary cells combines, and as Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, an elementary cell of the present utility model comprises two rotary modules, a sleeve and three blocks of spiral strakes.
Wherein rotary module comprises inner ring 2, cylindrical roller 9, outer ring 3.Inner ring 2 is comprised of two semi-ring steel components of symmetry, its external surface processing column roller groove 7.Cylindrical roller groove 7 is half-terete groove.Cylindrical roller 9 is positioned in cylindrical roller groove 7.Inner ring 2 is enclosed within on marine riser 1 from both sides, uses bolt 8 to be connected and fixed between two semi-rings.Outer ring 3 also is comprised of two semi-ring steel components of symmetry, two end faces up and down of outer ring 3 each semi-ring respectively stretch out an axial retention sheet 4, install the axial slip of rear outer ring 3 with the restricting rotation module, and leave certain gap between two axial ends of axial retention sheet 4 and inner ring 2, the friction when rotating to reduce.Outer ring 3 inner surface processing column roller annular grooves 10, outer ring 3 are enclosed within inner ring 2 outsides, and cylindrical roller 9 is placed in cylindrical roller annular groove 10, use bolt 8 to connect between two semi-rings, and connecting rear rotary module can freely rotate around the axis of marine riser 1.
Two semi-loops are separately all adopted in the inner ring 2 of rotary module and outer ring 3, are convenient to on-the-spot installation and removal.Rotary module adopts the structure design advantage of cylindrical roller 9 to be, precision is high, wearing and tearing are little, the life-span is long, can be within the time of growing retainer shaft to installation accuracy, realization is freely rotated.
The marine riser common supreme km of hundreds of does not under water wait, and in order to ensure inhibition, can every 2D to 4D, an elementary cell be installed on marine riser 1, can carry out suitable spacing adjustment according to actual conditions yet, makes inhibition reach best.
Embodiment:
Long-term statistical information according to the slenderness ratio of actual marine riser 1 and local ocean wave, ocean current, elementary cell spacing reasonable in design calculates the elementary cell number n that needs, and namely the rotary module number is 2n, the number of sleeve 5 is n, and the piece number of spiral strake 6 is 3n.
When single elementary cell is installed, at first, at the correct position of marine riser 1, a rotary module is installed, the inner ring 2 that is about to rotary module is sleeved on the external surface of marine riser 1 from both sides, be connected and fixed by bolt 8; After fixing inner ring 2, cylindrical roller 9 is positioned in the cylindrical roller groove 7 of inner ring 2 external surfaces; Then the outer ring 3 of rotary module is sleeved on inner ring 2 outsides from both sides, and makes cylindrical roller 9 be placed in cylindrical roller annular groove 10, re-use bolt 8 and be connected and fixed.Then, another rotary module is installed in the position of sleeve pipe of spacing 5 height on marine riser 1, and installation steps are identical with the installation steps of previous rotary module.After two rotary modules all install, sleeve 5 directly is sleeved on outer ring 3 external surfaces of two rotary modules.So far, installation an elementary cell.Subsequently, according to same erection sequence tandem, remaining elementary cell is installed.
After device installs, marine riser 1 is placed in seawater.In the seawater of different depth, each elementary cell can according to correspondence come flow path direction and flow velocity size, by the cooperation of cylindrical roller 9 and cylindrical roller annular groove 10, realize the rotation in various degree of spiral strake, thereby destroy the whirlpool formation at marine riser 1 rear, farthest suppress vortex-induced vibration.
Claims (2)
1. rotatable helical strake vortex induced vibration inhibiting device, combined by the coastal foreign standpipe axis direction tandem of a plurality of elementary cells, it is characterized in that, described elementary cell is comprised of two rotary modules, a sleeve (5) and three blocks of spiral strakes (6); Rotary module comprises inner ring (2), cylindrical roller (9), outer ring (3); Inner ring (2) is comprised of two semi-ring steel components of symmetry, its external surface processing column roller groove (7), and inner ring (2) is enclosed within on marine riser (1) from both sides, uses bolt (8) to connect between two semi-rings; Cylindrical roller groove (7) is half-terete groove, and cylindrical roller (9) is positioned in the cylindrical roller groove (7) of inner ring (2); Outer ring (3) also is comprised of two semi-ring steel components of symmetry, within it the upper processing column roller annular groove (10) in surface; Outer ring (3) is enclosed within outside inner ring (2), and cylindrical roller (9) is placed in cylindrical roller annular groove (10), uses bolt (8) to connect between two semi-rings, and limits the axial slip of outer ring (3) by axial retention sheet (4); Sleeve (5) and spiral strake (6) are molded for integral body adds, and sleeve (5) directly is sleeved on the outer ring (3) of rotary module, each equipped rotary module of the two ends up and down of each sleeve (5).
2. a kind of rotatable helical strake vortex induced vibration inhibiting device as claimed in claim 1, it is characterized in that, described sleeve (5) is coaxial with marine riser (1), and three blocks of spiral strakes (6) are arranged outside sleeve (5), and three blocks of spiral strakes (6) rotating Vortex, 30 degree are to 60 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320008428 CN202990906U (en) | 2013-01-09 | 2013-01-09 | Vortex-induced vibration suppression device with rotatable spiral strakes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320008428 CN202990906U (en) | 2013-01-09 | 2013-01-09 | Vortex-induced vibration suppression device with rotatable spiral strakes |
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| Publication Number | Publication Date |
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| CN202990906U true CN202990906U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320008428 Expired - Fee Related CN202990906U (en) | 2013-01-09 | 2013-01-09 | Vortex-induced vibration suppression device with rotatable spiral strakes |
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| CN (1) | CN202990906U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453276A (en) * | 2013-09-13 | 2013-12-18 | 西南石油大学 | Vortex-induced vibration suppression device with tail rotor rotatable separating disc and method |
| CN103485733A (en) * | 2013-10-15 | 2014-01-01 | 西南石油大学 | Device and method for inhibiting vortex-induced vibration of rotatable hexangular impeller with openings |
| CN103485731A (en) * | 2013-10-15 | 2014-01-01 | 西南石油大学 | Device and method for inhibiting vortex-induced vibration of rotatable boomerang type water riser |
| CN106437544A (en) * | 2016-09-23 | 2017-02-22 | 西南石油大学 | Device and method for inhibiting vortex-induced vibration of rotary and detachable S-shaped strake |
| CN109281621A (en) * | 2018-10-06 | 2019-01-29 | 西南石油大学 | A kind of vibration suppression strake rotary electrification and anti-corrosive apparatus and method |
| CN110541677A (en) * | 2019-08-13 | 2019-12-06 | 中国石油大学(华东) | Device, marine riser and method for inhibiting vortex-induced vibration |
| CN111634383A (en) * | 2020-06-10 | 2020-09-08 | 中国船舶工业集团公司第七0八研究所 | Motion suppression device of cylindrical ocean platform |
| CN112523267A (en) * | 2021-02-04 | 2021-03-19 | 中国空气动力研究与发展中心计算空气动力研究所 | Damping self-adaptive fairing device for underwater pile vortex-induced suppression |
-
2013
- 2013-01-09 CN CN 201320008428 patent/CN202990906U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453276A (en) * | 2013-09-13 | 2013-12-18 | 西南石油大学 | Vortex-induced vibration suppression device with tail rotor rotatable separating disc and method |
| CN103485733A (en) * | 2013-10-15 | 2014-01-01 | 西南石油大学 | Device and method for inhibiting vortex-induced vibration of rotatable hexangular impeller with openings |
| CN103485731A (en) * | 2013-10-15 | 2014-01-01 | 西南石油大学 | Device and method for inhibiting vortex-induced vibration of rotatable boomerang type water riser |
| CN106437544A (en) * | 2016-09-23 | 2017-02-22 | 西南石油大学 | Device and method for inhibiting vortex-induced vibration of rotary and detachable S-shaped strake |
| CN106437544B (en) * | 2016-09-23 | 2018-10-19 | 西南石油大学 | One kind can revolve dismantled and assembled S-shaped strake vortex-induced vibration suppression device and method |
| CN109281621A (en) * | 2018-10-06 | 2019-01-29 | 西南石油大学 | A kind of vibration suppression strake rotary electrification and anti-corrosive apparatus and method |
| CN110541677A (en) * | 2019-08-13 | 2019-12-06 | 中国石油大学(华东) | Device, marine riser and method for inhibiting vortex-induced vibration |
| CN111634383A (en) * | 2020-06-10 | 2020-09-08 | 中国船舶工业集团公司第七0八研究所 | Motion suppression device of cylindrical ocean platform |
| CN111634383B (en) * | 2020-06-10 | 2021-06-04 | 中国船舶工业集团公司第七0八研究所 | Motion suppression device of cylindrical ocean platform |
| CN112523267A (en) * | 2021-02-04 | 2021-03-19 | 中国空气动力研究与发展中心计算空气动力研究所 | Damping self-adaptive fairing device for underwater pile vortex-induced suppression |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20140109 |