초록 ▼

A suppression element (1) for vortex vibrations, comprising an envelope (2) for t least partly enveloping a tubular element (100); at least one projection (3) pointing away from the envelope. The envelope is modular to form with similar suppression elements a tube (101,102), which, in operation, at

A suppression element (1) for vortex vibrations, comprising an envelope (2) for t least partly enveloping a tubular element (100); at least one projection (3) pointing away from the envelope. The envelope is modular to form with similar suppression elements a tube (101,102), which, in operation, at least partly, envelops a tubular element (100). Also, a construction kit for a suppression system and a suppression system for vortex vibrations with at least two suppression element (1), which together form a tube, which in operation, at least partly envelops a tubular element (100), as well as an apparatus for extracting minerals with a pipeline enveloped by a suppression system are disclosed.

대표청구항 ▼

The invention claimed is: 1. A suppression element (1) for vortex vibrations, comprising: an envelope (2) for at least partly enveloping a tubular element (100), wherein the envelope is modular to form, in circumferential direction of the tubular element (100), with similar suppression elements a t

The invention claimed is: 1. A suppression element (1) for vortex vibrations, comprising: an envelope (2) for at least partly enveloping a tubular element (100), wherein the envelope is modular to form, in circumferential direction of the tubular element (100), with similar suppression elements a tube (101, 102) which, in operation, at least partly envelops the tubular element, and wherein the suppression element (1) has, in a longitudinal direction (A) of the suppression element (1), a first longitudinal direction (A) end (10) and an opposing second longitudinal direction (A) end (11); at least one projection (3) pointing away from the envelope for reducing the formation of vortices on the downstream side of the tubular element (100), wherein the projection (3) extends in the longitudinal direction (A) and lies at an inclined angle to the longitudinal direction (A); and a directing element (6-8) for positioning the suppression element (1) relative to another said suppression element such that the first end (10) of the suppression element (1) adjoins the second end (11) of said another suppression element; characterized in that the projection (3) extends from a first longitudinal direction (A) projection end of the projection (3) near the first end (10) of the suppression element (1) to a second longitudinal direction (A) projection end of the projection (3) near the second end (11) of the suppression element (1), and in that the directing element (6-8) comprises means for positioning the projection (3) such that its first projection end adjoins a second projection end of a projection of said another suppression element, enabling the projections of several said suppression elements to be connected to each other, as a result of which an elongate continuous projection can be obtained. 2. The suppression element (1) according to claim 1, further comprising: at least one spacer (4a-4d) for maintaining, in mounted condition, an interspace between the envelope (2) and the tubular element (100). 3. The suppression element (1) according to claim 1, further comprising at least one passage (5) in the envelope (2). 4. The suppression element (1) according to claim 3, wherein the passage (5) at least partly extends through the projection (3). 5. The suppression element (1) according to claim 3, wherein the passage (5) also forms a passage for a connecting element (9). 6. The suppression element (1) according to claim 3, wherein the passage (5) is at a transition between the envelope (2) and the projection (3). 7. The suppression element (1) according to claim 6, wherein the surface of the projection (3) lies at an angle greater than or equal to 90 degrees to the surface of the envelope (2). 8. The suppression element (1) according to claim 6, wherein the envelope (2) is unilaterally curved around a longitudinal direction (A) of the suppression element (1). 9. The suppression element (1) according to claim 8, wherein the envelope (2), transverse to the longitudinal direction (A), is substantially in the form of a circular arc. 10. The suppression element (1) according to claim 9, wherein the envelope (2), seen transverse to the longitudinal direction (A), forms a circular arc of 120 plus or minus up to 3 degrees. 11. The suppression element (1) according to claim 1, wherein the suppression element (1) has one projection (3). 12. The suppression element (1) according to claim 1, wherein the projection (3) has a triangular cross-section. 13. The suppression element (1) according to claim 1, wherein the projection (3) is open on a side directed toward the envelope (2). 14. The suppression element (1) according to claim 1, wherein an interior (22) of the envelope (2), which interior (22), in mounted condition, is directed toward the tubular element (100), has a form corresponding to an exterior (21) of the envelope (2), which exterior (21), in mounted condition, faces away from the tubular element (100). 15. The suppression element (1) according to claim 1, wherein said element is manufactured from a material having a specific density lower than water. 16. The suppression element (1) according to claim 15, wherein the material has a specific density ranging between 800 and 900 kg/cm3. 17. The suppression element (1) according to claim 1, wherein the element is at least partly manufactured from a foamed plastic. 18. The suppression element (1) according to claim 1, wherein the element is at least partly manufactured from reused plastic. 19. The suppression element (1) according to claim 1, wherein the element is at least partly manufactured from polyethylene or polypropylene. 20. The suppression element (1) according claim 1, further comprising an origin marking (12). 21. A construction kit for a suppression system, comprising at least two suppression elements (1) according to claim 1. 22. A suppression system for vortex vibrations, comprising at least two suppression elements (1) according to claim 1, which together form a tube, which, in operation, at least partly envelops a tubular element (100). 23. The suppression system for vortex vibrations according to claim 22, further comprising: a flow element (5) for providing a fluid flow in the space between the tubular element (100) and the suppression elements (1). 24. An apparatus for extracting minerals, comprising a platform, which is located in or on a body of water, and at least one pipeline (100), which extends from the platform in the water, a part of the pipeline located in the water at least partly being enveloped by a suppression element (1) according to claim 1. 25. A mold for manufacturing a suppression element (1) according to claim 1, wherein the mold comprises interior walls defining a moulding space of the mold, which moulding space corresponds to the shape of the suppression element (1).