CN111075801B - Marine riser spiral vortex vibration suppression device - Google Patents
Marine riser spiral vortex vibration suppression device Download PDFInfo
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- CN111075801B CN111075801B CN201911219083.2A CN201911219083A CN111075801B CN 111075801 B CN111075801 B CN 111075801B CN 201911219083 A CN201911219083 A CN 201911219083A CN 111075801 B CN111075801 B CN 111075801B
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- 230000001629 suppression Effects 0.000 title abstract description 27
- 238000000429 assembly Methods 0.000 claims description 23
- 230000000712 assembly Effects 0.000 claims description 23
- 238000013016 damping Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/01—Risers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a spiral disturbed flow vibration suppression device for an ocean riser, which comprises a riser (12); the outer surface of the stand pipe (12) is nested with a plurality of sections of stand pipe sleeves (14) which are connected in sequence; each section of vertical pipe sleeve (14) is provided with three spoiler groups (6) welded at equal intervals; each spoiler group (6) comprises a plurality of spoilers (5) distributed in a spiral line shape; the interval distance between any two adjacent spoilers (5) in each spoiler group (6) is equal. The spiral disturbed flow vibration suppression device for the marine riser, disclosed by the invention, can effectively suppress vortex-induced vibration of the marine riser, has the characteristics of good omnidirectional vibration suppression efficiency and good resistance performance, and has great practical significance.
Description
Technical Field
The invention relates to the technical field of marine riser vibration suppression, in particular to a marine riser spiral type disturbed flow vibration suppression device.
Background
Risers are connecting conduits in deep sea oil and gas development systems for connecting ocean platforms and subsea wellheads. The other parts of the stand pipe are not fixed and supported except the upper end and the lower end of the stand pipe are connected and fixed. Therefore, when the ocean current flows through the surface of the vertical pipe, the two sides of the vertical pipe alternately form vortex at a certain flow velocity, and the vortex shedding can generate a periodic variable force on the vertical pipe, so that the vertical pipe vibrates in the vertical flow direction. The vortex can fall off along with the wake flow of the ocean current fluid, when the vortex falling frequency is close to the natural frequency of the vertical pipe, the vertical pipe can be caused to resonate strongly, the vortex-induced vibration problem is formed, and the vertical pipe can be damaged by fatigue after being in the environment for a long time. In order to reduce the fatigue damage of the riser caused by the vortex-induced vibration and prolong the service life of the riser, the reduction of the vortex-induced vibration needs to be considered when the riser is designed. At present, the generation of the vortex is reduced and the vortex-induced vibration is restrained at the source by changing the surface shape of the riser and adding other devices on the surface of the riser internationally.
In recent years, most vibration suppression devices with simple structures have unidirectional characteristics, and have poor vibration suppression effect on omnidirectional vortex-induced vibration. The performance of the omnidirectional suppression measure with a complex structure is good, but the design, manufacture and installation cost is high, the drag force of the stand pipe is increased, the problems of dynamic instability and the like exist, and the omnidirectional suppression measure is difficult to be applied in engineering.
Disclosure of Invention
The invention aims to provide a spiral turbulence vibration suppression device for an ocean riser aiming at the technical defects in the prior art.
Therefore, the invention provides a spiral turbulence vibration suppression device for an ocean riser, which comprises a riser;
the outer surface of the vertical pipe is nested with a plurality of sections of vertical pipe sleeves which are connected in sequence;
the outer surface of each section of vertical pipe sleeve is provided with three spoiler groups welded at equal intervals;
each spoiler group comprises a plurality of spoilers distributed in a spiral line shape;
in each spoiler group, the spacing distance between any two adjacent spoilers is equal.
Wherein the length of each section of the vertical pipe sleeve is 3-5 times of the outer diameter of the vertical pipe;
the inner diameter of the vertical pipe sleeve is the same as the outer diameter of the vertical pipe, and the vertical pipe sleeve is directly embedded on the outer surface of the vertical pipe;
the wall thickness of the vertical pipe sleeve is equal to 0.1-0.12 times of the outer diameter of the vertical pipe.
Each section of vertical pipe sleeve is formed by annularly splicing three sleeve components with the same shape and size;
each sleeve component is in the shape of a circular arc;
each sleeve component is provided with a spoiler group, and a plurality of spoilers on the spoiler group are distributed in a spiral line shape in the diagonal direction of the sleeve component;
the spiral lines of the three spoiler groups of each section of vertical pipe sleeve are parallel to each other;
the spoiler groups on any two adjacent sections of vertical pipe sleeves are mutually connected and distributed in a spiral line shape, and the pitch of the spiral line shape is equal to 9-15 times of the outer diameter of the vertical pipe.
In each section of vertical pipe sleeve, the left side and the right side of each sleeve component are respectively provided with an axial clamping tooth and an axial clamping groove;
the opposite sides of any two adjacent sleeve assemblies are mutually occluded and clamped through the axial clamping teeth and the axial clamping grooves.
In each section of vertical pipe sleeve, an eye plate is respectively welded at the upper end and the lower end of the left side and the upper end and the lower end of the right side of each sleeve component;
the eye plates of any two adjacent sleeve assemblies are correspondingly arranged and fixedly connected through bolts.
The top and the bottom of each sleeve assembly in each section of vertical pipe sleeve are respectively provided with an annular clamping tooth and an annular clamping groove;
for any two adjacent sections of vertical pipe sleeves, the opposite sides of the two sections of vertical pipe sleeves are mutually occluded and clamped through the annular clamping teeth and the annular clamping grooves.
The sleeve assembly comprises a plurality of sleeve assemblies, wherein the sleeve assemblies are arranged in a spiral mode, the plurality of spoilers are distributed in a spiral mode, and the uppermost spoiler and the lowermost spoiler are located at two opposite corner points of each sleeve assembly respectively.
Wherein, the shape of each spoiler is axisymmetric;
the left side and the right side of each spoiler are provided with spoiler side edges, and the upper side and the lower side of each spoiler are respectively provided with spoiler top edges and spoiler bottom edges;
wherein, the side edges of the spoiler are concave arcs, and the arcs are in the shape of a circle, an ellipse, a parabola or a hyperbola;
the bottom edge of the spoiler is in an arc shape with the same curvature as the outer diameter of the vertical pipe, and the length of the bottom edge of the spoiler is 0.2-0.28 times of the outer diameter of the vertical pipe;
the thickness of the bottom edge of the spoiler is 0.2-0.4 times of the length of the bottom edge of the spoiler;
the length of the top edge of the spoiler is 0.4-0.6 times of the length of the bottom edge of the spoiler;
the thickness of the top edge of the spoiler is 0.2-0.4 times of the length of the top edge of the spoiler;
the height of the spoiler is 0.2-0.26 times of the outer diameter of the vertical pipe.
Wherein the distance between any two spoilers in the spiral line shape is 0.05-0.3 times of the length of the bottom edge of each spoiler;
the assembling direction of the spoiler is the same as the tangential direction of the spiral line at the middle point of the bottom edge of the spoiler.
Compared with the prior art, the spiral disturbed flow vibration suppression device for the marine riser can effectively suppress vortex-induced vibration of the marine riser, has the characteristics of good omnidirectional vibration suppression efficiency and good resistance performance, and has great practical significance.
In addition, the marine riser spiral type disturbed flow vibration suppression device provided by the invention is scientific in structural design, easy to process and install, low in cost and beneficial to popularization and application.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a marine riser helical turbulence damping device according to the present invention;
FIG. 2a is a schematic structural diagram of a sleeve assembly of a marine riser helical turbulence damping device, wherein each section of riser sleeve comprises a welded spoiler;
FIG. 2b is a partial structural side view of a sleeve assembly of a marine riser helical-type turbulence damping device according to the present invention, wherein each section of the riser sleeve comprises a welded spoiler;
FIG. 3a is a side view of a spoiler in the marine riser helical type turbulence suppression apparatus according to the present invention;
FIG. 3b is a front view of a spoiler in the marine riser helical type spoiler damping device according to the present invention;
FIG. 3c is a perspective view of a spoiler in the marine riser helical type turbulence suppression apparatus according to the present invention;
FIG. 4a is a front view of a riser sleeve after welding a spoiler in a marine riser helical spoiler vibration suppression device according to the present invention;
fig. 4b is a cross-sectional view taken along line a-a of fig. 4 a.
In the figure: 1. the top edge of the spoiler; 2. the side edge of the spoiler; 3. the bottom edge of the spoiler; 4. a sleeve assembly; 5. a spoiler; 6. a spoiler group; 7, axial clamping teeth; 8. an axial clamping groove; 9. an eye plate; 10. annular latch; 11. a circumferential clamping groove; 12. a riser; 13. a bolt; 14. a riser sleeve.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1 to 4, the present invention provides a marine riser helical type turbulence damping device, which comprises a riser 12;
the outer surface of the riser 12 is nested with a plurality of sections of riser sleeves 14 (not limited to the three shown in fig. 1) which are connected in series;
the outer surface of each section of the vertical pipe sleeve 14 is provided with three spoiler groups 6 welded at equal intervals;
each spoiler group 6 comprises a plurality of spoilers 5 distributed in a spiral line shape;
in each spoiler group 6, any two adjacent spoilers 5 are spaced apart by the same distance.
In the invention, the length of each section of the riser sleeve 14 is 3-5 times of the outer diameter of the riser 12;
the inner diameter of the riser sleeve 14 is the same as the outer diameter of the riser 12, and the riser sleeve 14 is directly nested on the outer surface of the riser 12;
the wall thickness of the riser sleeve 14 is equal to 0.1-0.12 times of the outer diameter of the riser 12, so that the sleeve strength is ensured.
In the invention, each section of the vertical pipe sleeve 14 is formed by circularly splicing three sleeve components 4 with the same shape and size;
each sleeve component 4 is in the shape of a circular arc;
each sleeve component 4 is provided with a spoiler group 6, and a plurality of spoilers 5 on each spoiler group 6 are distributed in a spiral line shape in the diagonal direction of the sleeve component 4;
the spiral lines on the three spoiler groups 6 of each section of the vertical pipe sleeve 14 are parallel to each other;
the spoiler groups 6 on any two adjacent sections of vertical pipe sleeves 14 are mutually connected and distributed in a spiral line shape. That is, the spoilers 5 of the multi-section riser sleeve 14 are continuously disposed in a spiral pattern on the outside of the riser 12.
In the invention, in the concrete implementation, in each section of the vertical pipe sleeve 14, the left side and the right side of each sleeve component 4 are respectively provided with an axial latch 7 and an axial clamping groove 8;
the opposite sides of any two adjacent sleeve assemblies 4 are mutually meshed and clamped through axial clamping teeth 7 and axial clamping grooves 8.
In particular, the axial latch 7 is a zigzag latch.
In the invention, in each section of the vertical pipe sleeve 14, the upper end and the lower end of the left side and the upper end and the lower end of the right side of each sleeve component 4 are respectively welded with an eye plate 9;
the eye plates 9 of any two adjacent sleeve assemblies 4 are correspondingly arranged and fixedly connected through bolts 13.
In the invention, in a concrete implementation, in each section of the vertical pipe sleeve 14, the top and the bottom of each sleeve assembly 4 are respectively provided with a circumferential latch 10 and a circumferential slot 11;
for any two adjacent vertical pipe sleeves 14, the opposite sides of the two vertical pipe sleeves 14 are mutually engaged and clamped through the annular clamping teeth 10 and the annular clamping grooves 11.
In particular, the circumferential latch 10 is a zigzag latch.
It should be noted that, for the present invention, each adjacent section of the tubular sleeve 14 is engaged by a circumferential latch and a circumferential catch. Each section of the vertical pipe sleeve 14 is composed of three sleeve assemblies 4 with the same size and shape, and the adjacent sleeve assemblies 4 are meshed with the axial clamping grooves through axial clamping teeth; two eye plates 9 are welded to each sleeve assembly 4 for bolting adjacent sleeve assemblies together.
It should be noted that, as shown in fig. 2, in each section of the riser sleeve 14, the seam lines of two adjacent sleeve assemblies 4 are engaged by the axial latch 7 and the axial catch 8 in the shape of a "zigzagged" to facilitate the butt joint of the sleeve assemblies 4.
Wherein, an eye plate 9 is welded at two end points of the butt joint line (i.e. the seam line) of the adjacent sleeve assemblies 4 respectively, so that the adjacent sleeve assemblies 4 are fixed by bolts 13 after the axial latch and the axial slot are engaged. The joint of the adjacent sleeve components 4 on the two sections of vertical pipe sleeves 14 is engaged by the annular clamping teeth 10 and the annular clamping grooves 11 in a shape like a Chinese character 'ji', so that the two adjacent sections of vertical pipe sleeves 14 are prevented from sliding relatively in a working state.
In particular, each sleeve component 4 is formed by one-step processing of steel or aluminum alloy materials.
In the present invention, referring to fig. 2, in a specific implementation, a plurality of spoilers 5 are distributed in a spiral line shape in each sleeve assembly 4, wherein the uppermost spoiler 5 and the lowermost spoiler 5 are respectively located at two opposite corner points of each sleeve assembly 4.
In the concrete implementation, each spoiler group 6 comprises a plurality of spoilers 5 distributed in a spiral line shape, wherein the pitch of the spiral line shape is equal to 9-15 times of the outer diameter of the vertical pipe (12).
In the present invention, in a specific implementation, referring to fig. 2 and 3, each spoiler 5 has an axially symmetric shape;
the left side and the right side of each spoiler 5 are provided with spoiler side edges 2, and the upper side and the lower side of each spoiler 5 are respectively provided with spoiler top edges 1 and spoiler bottom edges 3;
wherein, the side edges 2 of the spoilers are all concave arcs, and the arcs can be common curves such as circles, ellipses, parabolas, hyperbolas and the like;
the bottom edge 3 of the spoiler is in a circular arc shape with the same curvature as the outer diameter of the stand pipe 12, and the length of the bottom edge 3 of the spoiler is 0.2-0.28 times of the outer diameter of the stand pipe 12;
the thickness of the bottom edge 3 of the spoiler is 0.2-0.4 times of the length of the bottom edge 3 of the spoiler;
the length of the top edge 1 of the spoiler is 0.4-0.6 times of the length of the bottom edge 3 of the spoiler;
the thickness of the top edge 1 of the spoiler is 0.2-0.4 times of the length of the top edge 1 of the spoiler;
the height of the spoiler 5 is 0.2-0.26 times of the outer diameter of the stand pipe 12.
In particular, the distance between any two spiral spoilers 5 is 0.05-0.3 times of the length of the bottom edge 3 of each spoiler;
the spoiler 5 is assembled in the same direction as the tangential direction of the spiral line at the midpoint of the spoiler bottom edge 3.
It should be noted that each spoiler group 6 is composed of a plurality of spoilers 5 having the same shape and size.
In particular, the spoiler 5 is formed by one-step processing of steel or aluminum alloy materials.
It should be noted that, with the present invention, the spoiler 5 is welded to the surface of the sleeve member 4 in a spiral shape according to the distance between the adjacent spoilers 5 in the spoiler group 6 and the direction of assembly.
For the specific implementation of the present invention, as shown in fig. 4, the installation manner of the turbulent vibration suppression device for the helical riser of the present invention is as follows: a section of riser sleeve 14 is installed, i.e. the assembled sleeve assemblies 4 are installed on the riser 12, then the adjacent sleeve assemblies 4 are installed, the axial latches 7 and the axial slots 8 between the adjacent sleeve assemblies 4 are engaged, and the eye plates 9 of the adjacent sleeve assemblies are fastened by bolts 13. Then, other adjacent vertical pipe sleeve barrels 14 of other sections are installed, and the adjacent vertical pipe sleeve barrels 14 are meshed with the annular clamping grooves 11 through the annular clamping teeth 10, so that the continuity of a spiral line formed by the spoilers is ensured, and the spoilers are distributed at intervals in a spiral line shape.
In order that the invention may be more clearly understood, the following description is given with reference to specific examples.
As shown in fig. 1, the riser 12 is comprised of a three-piece riser sleeve 14 and a spoiler 5. Each section of riser sleeve 14 is 3 times the length of the outer diameter of the riser 12 and 0.1 times the wall thickness of the outer diameter of the riser 12, and is formed by splicing three sleeve assemblies 4 with the same size and shape.
As shown in fig. 2, the spoiler group 6 on the sleeve assembly 4 is composed of spoilers 5 with equal shapes and sizes, the distance between the middle points of the spoiler bottom edges 3 of the adjacent spoilers 5 is 1.1 times of the length of the spoiler bottom edges 3, and the assembly direction of the spoilers 5 is the same as the spiral line direction at the middle points of the spoiler bottom edges 3. The spoiler 5 is made of steel or aluminum alloy materials and is formed in one step. According to the distance between adjacent spoilers 5 in the spoiler group and the assembling direction, the spoilers 5 are distributed in a spiral line shape and welded on the outer surface of the sleeve component 4. The pitch of the spiral line is equal to 9-15 times of the outer diameter of the stand pipe 12.
As shown in fig. 3, the spoiler 5 is axisymmetrical, and the spoiler sides 2 are all parabolic. The bottom edge 3 of the spoiler is an arc with the same curvature as the outer diameter of the stand pipe 12, the length of the arc is 0.2 times of the outer diameter of the stand pipe 12, and the thickness of the bottom edge 3 of the spoiler is 0.2 times of the length of the bottom edge 3 of the spoiler. The length of the top edge 1 of the spoiler is 0.4 times the length of the bottom edge 3 of the spoiler, and the thickness of the top edge 1 of the spoiler is 0.2 times the length of the top edge of the spoiler. The height of the spoiler is 0.2 times the outer diameter of the riser 12.
As shown in fig. 2, 3 and 4, the sleeve assemblies 4 are aligned with each other through the latch 7 and the catch 8, and the eye plate 9 is fastened by the bolt 13. Two adjacent sections of riser sleeves 14 are aligned by the latch 10 and the catch 11.
Based on the technical scheme, the invention discloses an improvement on a marine riser spiral strake device, and particularly relates to an improvement on a spoiler fixed on a riser sleeve on the outer surface of a riser, wherein a plurality of spoilers which are equidistantly continuous and distributed in a spiral line shape are welded on the riser sleeve, so that when fluid flows through the riser, the uniformly-surrounded spiral spoilers can disturb a flow winding field around the riser, and the formation of vortexes is damaged. Wherein, the clearance between the adjacent spoiler on same helix and the side of arc shape spoiler can guide fluid to pass, along helix evenly distributed's spoiler clearance, can effectively play the reposition of redundant personnel effect, reduces the drag force that acts on the riser.
Compared with the prior art, the marine riser spiral disturbed flow vibration suppression device provided by the invention has the following beneficial effects:
1. the invention has simple structure and low manufacturing and installation cost, can achieve the vortex-induced vibration suppression effect of more than 95 percent of the traditional spiral strake device, simultaneously reduces the drag force by 20 percent compared with the traditional spiral strake device, and has good vibration suppression effect and resistance performance.
2. Under the action of outflow in any direction, the turbulence of the turbulence pieces to the fluid and the generation and the falling of vortex are damaged, so that the vibration amplitude of the vertical pipe is reduced, the vortex-induced vibration of the vertical pipe is reduced, and the service life of the vertical pipe is prolonged.
3. The performance of the invention is verified by model experiments: through a small-scale model manufactured by a 3D printing technology, a plurality of groups of dragging forced vibration tests show that the scheme of the invention can achieve the vortex-induced vibration suppression effect of more than 95% of the traditional spiral strake device under the same dragging speed and forced amplitude, and simultaneously, the dragging force is 80% of that of the traditional spiral strake device. Therefore, the device can reduce the vortex-induced vibration of the stand pipe and has good resistance performance.
Compared with the prior art, the spiral disturbed flow vibration suppression device for the marine riser, provided by the invention, can effectively suppress vortex-induced vibration of the marine riser, has the characteristics of good omnidirectional vibration suppression efficiency and good resistance performance, and has great practical significance.
In addition, the marine riser spiral type disturbed flow vibration suppression device provided by the invention is scientific in structural design, easy to process and install, low in cost and beneficial to popularization and application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a device but marine riser spiral vortex shakes, has riser (12) and riser sleeve (14) on and fixes spoiler group (6) on riser sleeve (14), its characterized in that:
the outer surface of the vertical pipe (12) is nested with a plurality of sections of vertical pipe sleeves (14) which are connected in sequence, the wall thickness of each vertical pipe sleeve (14) is equal to 0.1-0.12 times of the outer diameter of the vertical pipe (12), and the length of each section of vertical pipe sleeve (14) is 3-5 times of the outer diameter of the vertical pipe (12);
each section of vertical pipe sleeve (14) is formed by circularly splicing three sleeve assemblies (4) with the same shape and size; the outer surface of each section of vertical pipe sleeve (14) is provided with three welded spoiler groups (6), and the three spoiler groups (6) are equidistant and parallel to each other;
the sleeve assemblies (4) are arc-shaped, each sleeve assembly (4) is provided with a spoiler group (6), each spoiler group (6) comprises a plurality of spoilers (5) distributed in a spiral line shape, the spacing distance between any two adjacent spoilers (5) is equal, and the spacing distance is 0.05-0.3 time of the length of the bottom edge (3) of each spoiler;
the spoilers (5) are distributed in a spiral line shape in the diagonal direction of the sleeve component (4), the pitch of the spiral line shape is equal to 9-15 times of the outer diameter of the vertical pipe (12), and the uppermost spoiler (5) and the lowermost spoiler (5) of the sleeve component (4) are respectively positioned at two diagonal points of each sleeve component (4);
the shape of each spoiler (5) is axisymmetric; the left side and the right side of each spoiler (5) are provided with spoiler side edges (2), and the upper side and the lower side of each spoiler (5) are respectively provided with spoiler top edges (1) and spoiler bottom edges (3); wherein, the side edges (2) of the spoiler are all concave arcs, and the arcs are in the shape of a circle, an ellipse, a parabola or a hyperbola; the bottom edge (3) of the spoiler is in the shape of a circular arc with the same curvature as the outer diameter of the vertical pipe (12), and the length of the bottom edge (3) of the spoiler is 0.2-0.28 times of the outer diameter of the vertical pipe (12); the thickness of the bottom edge (3) of the spoiler is 0.2-0.4 times of the length of the bottom edge (3) of the spoiler; the length of the top edge (1) of the spoiler is 0.4-0.6 times that of the bottom edge (3) of the spoiler; the thickness of the top edge (1) of the spoiler is 0.2-0.4 times of the length of the top edge (1) of the spoiler; the height of the spoiler (5) is 0.2-0.26 times of the outer diameter of the vertical pipe (12);
the spoiler groups (6) on any two adjacent sections of vertical pipe sleeves (14) are mutually connected and finally distributed in a spiral line shape.
2. The marine riser helical flow damping device as claimed in claim 1, wherein in each section of riser sleeve (14), the top and bottom of each sleeve assembly (4) has a circumferential latch (10) and a circumferential catch (11), respectively;
for any two adjacent vertical pipe sleeves (14), one sides of the two adjacent vertical pipe sleeves (14) opposite to each other are mutually occluded and clamped through the annular clamping teeth (10) and the annular clamping grooves (11).
3. The marine riser helical flow damping device as claimed in claim 1, wherein in each section of riser sleeve (14), the left and right sides of each sleeve assembly (4) are provided with axial latches (7) and axial slots (8), respectively;
the opposite sides of any two adjacent sleeve assemblies (4) are mutually meshed and clamped through axial clamping teeth (7) and axial clamping grooves (8).
4. The marine riser helical flow damping device as claimed in claim 1, wherein in each section of riser sleeve (14), an eye plate (9) is welded to each of the left upper and lower ends and the right upper and lower ends of each sleeve assembly (4);
the eye plates (9) of any two adjacent sleeve assemblies (4) are correspondingly arranged and fixedly connected through bolts (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911219083.2A CN111075801B (en) | 2019-12-03 | 2019-12-03 | Marine riser spiral vortex vibration suppression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911219083.2A CN111075801B (en) | 2019-12-03 | 2019-12-03 | Marine riser spiral vortex vibration suppression device |
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| Publication Number | Publication Date |
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| CN111075801A CN111075801A (en) | 2020-04-28 |
| CN111075801B true CN111075801B (en) | 2022-03-04 |
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| CN201911219083.2A Expired - Fee Related CN111075801B (en) | 2019-12-03 | 2019-12-03 | Marine riser spiral vortex vibration suppression device |
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| CN112610061B (en) * | 2020-12-18 | 2022-04-26 | 内蒙古鲁电蒙源电力工程有限公司 | Turbulent flow energy dissipation device for inhibiting aeolian vibration of steel pipe tower rod piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6896447B1 (en) * | 2000-11-14 | 2005-05-24 | Weldon Taquino | Vortex induced vibration suppression device and method |
| CN101387188A (en) * | 2008-11-04 | 2009-03-18 | 中国海洋大学 | Suppressing vibration method for marine riser vortex-induced vibration and suppressing vibration apparatus thereof |
| WO2018231061A1 (en) * | 2017-06-15 | 2018-12-20 | Bluemarine Offshore Yard Services B.V. | Viv suppression strake assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB201205059D0 (en) * | 2012-03-22 | 2012-05-09 | Trelleborg Offshore U K Ltd | Cladding |
| CN206642677U (en) * | 2017-01-13 | 2017-11-17 | 浙江博华环境技术工程有限公司 | A kind of turbulence structure of dissolver |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6896447B1 (en) * | 2000-11-14 | 2005-05-24 | Weldon Taquino | Vortex induced vibration suppression device and method |
| CN101387188A (en) * | 2008-11-04 | 2009-03-18 | 中国海洋大学 | Suppressing vibration method for marine riser vortex-induced vibration and suppressing vibration apparatus thereof |
| WO2018231061A1 (en) * | 2017-06-15 | 2018-12-20 | Bluemarine Offshore Yard Services B.V. | Viv suppression strake assembly |
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