Marine riser vortex-induced vibration suppression device with rotatable flow guide wings

Abstract

The utility model relates to the technical field of marine riser facilities, and discloses a marine riser vortex-induced vibration suppression device with rotatable flow guide wings, which comprises a water pipe body, two fixed mounting cylinders are arranged on the side surface of the water pipe body, a plurality of grooves are formed in the outer surfaces of the mounting cylinders, mounting grooves are formed in the inner walls of the grooves, and the rotatable flow guide wings are arranged in the mounting grooves. The number of the installation grooves is fixed to be two, and protection assemblies are fixedly installed in the installation grooves. Through the arrangement of the protection assembly, the situation that the flow guide wings are prone to being damaged under the condition of long-time collision is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of marine riser facilities, in particular to a riser vortex-induced vibration suppression device with rotatable guide wings. Background Art

[0002] As offshore oil and gas production advances into deeper waters, risers in deepwater environments can be considered slender, flexible structures, making the small deformation theory no longer applicable. This makes the vortex-induced vibration (VIV) problem of risers even more prominent. As a critical channel connecting the wellhead and the upper offshore platform, its service reliability is crucial for the safe operation of offshore oil and gas drilling and production. Vortex-induced vibration (VIV) is the biggest enemy of the safe service of risers in wave and current environments. In particular, the resonance caused by the vortex shedding frequency of the circling seawater, which is close to the natural frequency of the marine riser, accelerates fatigue damage to the marine riser. Failure of the riser not only results in huge economic losses, but also causes catastrophic damage to the local marine environment.

[0003] The utility model patent application document with publication number "CN206319845U" discloses a vortex-induced vibration suppression device for a watertight pipe with rotatable guide wings, which belongs to the technical field of marine riser facilities. The technical problem to be solved by the utility model is to provide a vortex-induced vibration suppression device for a watertight pipe with rotatable guide wings, which has a simple structure, is easy to install, and can be adaptively adjusted according to the incoming flow direction. The device comprises a fixed cylinder, a guide wing, and a rotating shaft. A guide wing mounting groove is axially provided on the outer circumferential surface of the fixed cylinder. A blind hole is provided at one end of the guide wing mounting groove and a through hole is provided at the other end. A connecting hole is provided on the guide wing, and the guide wing is installed in the guide wing mounting groove through a rotating shaft. The guide wing of the utility model can respond to incoming flow in any direction and make adaptive rotation adjustments, thereby effectively reducing vortex-induced vibrations caused by different incoming flow directions, adapting to deep-sea environments with frequently changing flow directions, and extending the service life of the watertight pipe. The entire device of the utility model is made of plastic, which can greatly reduce costs and simplify manufacturing processes.

[0004] The watertight pipe vortex-induced vibration suppression device with rotatable guide wings disclosed in the above document has the following defects: during use, the guide wings of this technical solution will swing and rotate greatly under the action of water force, and will collide with the fixed tube while swinging. If the impact lasts for a long time, the guide wings will be easily damaged and have a relatively short service life.

[0005] It can be seen from this that the existing watertight pipe vortex-induced vibration suppression device with rotatable guide wings does not have better protective components, and it is necessary to improve the existing deficiencies and provide a watertight pipe vortex-induced vibration suppression device with rotatable guide wings. Utility Model Content

[0006] The utility model discloses a water pipe vortex vibration suppression device with rotatable guide vane, to solve the problem in the above background technology.

[0007] To solve the above technical problem, the utility model is realized through the following technical schemes:

[0008] The utility model discloses a water pipe vortex vibration suppression device with rotatable guide vane, to solve the problem in the above background technology.

[0009] Further, the protection assembly includes a limiting block, a sliding slot, a sliding rod, a movable block, a spring, a first connecting block, a supporting rod, a second connecting block and an arc surface stopper, the inside of the mounting groove is fixedly installed with the limiting block, one side of the limiting block is provided with the sliding slot, the inner wall of the sliding slot is fixedly installed with the sliding rod, the circumferential surface of the sliding rod is slidably connected with the movable block, the number of the movable block is fixedly installed with the spring, the spring is sleeved on the circumferential surface of the sliding rod, one side of the movable block is fixedly installed with the first connecting block, one side of the first connecting block is rotatably connected with the supporting rod, one end of the supporting rod is rotatably connected with the second connecting block, one end of the second connecting block is fixedly installed with the arc surface stopper, the arc surface stopper exerts force on the second connecting block, the second connecting block drives the supporting rod to push the first connecting block, the first connecting block drives the movable block to move on the sliding rod, the two movable blocks move on the sliding rod and press the spring, the spring buffers the impact force, avoids the damage of the guide vane caused by the large collision force, and the service life is relatively improved.

[0010] Further, the inner wall of the recess is rotatably connected with a rotating rod.

[0011] Further, the circumferential surface of the rotating rod is fixedly installed with the guide vane.

[0012] Further, the upper surface of the mounting cylinder is fixedly installed with a third connecting block, and the number of the third connecting block is fixedly installed.

[0013] Further, one side of the third connecting block is provided with a threaded hole.

[0014] The utility model has the following beneficial effects:

[0015] (1) When the guide wing of the utility model swings left and right, it will hit the arc-surface stopper, and the arc-surface stopper applies force to the second connecting block. The second connecting block drives the support rod to push the first connecting block, and the first connecting block drives the movable block to move on the slide bar. The two movable blocks move on the slide bar to squeeze the spring, and the impact force is buffered and unloaded by the spring, avoiding the situation where the guide wing is damaged by a large collision force when it hits, and the service life is relatively improved.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall decomposition structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the protective component of the utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 4 For this utility model Figure 1 A schematic diagram of the structure enlargement at point A;

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0023] In the figure: 1. Water pipe body; 2. Mounting cylinder; 201. Groove; 202. Mounting groove; 3. Protective assembly; 301. Limit block; 302. Slide groove; 303. Slide rod; 304. Movable block; 305. Spring; 306. First connecting block; 307. Support rod; 308. Second connecting block; 309. Arc stopper; 4. Rotating rod; 5. Guide wing; 6. Third connecting block; 7. Threaded hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1 - Figure 4 As shown, the utility model is a vortex-induced vibration suppression device for a watertight pipe with a rotatable guide wing, comprising a water pipe body 1, a mounting tube 2 is provided on the side of the water pipe body 1, the number of the mounting tubes 2 is fixed at two, a plurality of grooves 201 are provided on the outer surface of the mounting tube 2, the inner wall of the groove 201 is provided with a mounting groove 202, the number of the mounting groove 202 is fixed at two, and a protective component 3 is fixedly installed inside the mounting groove 202.

[0026] The protective assembly 3 includes a limit block 301, a slide groove 302, a slide rod 303, a movable block 304, a spring 305, a first connecting block 306, a support rod 307, a second connecting block 308 and a curved stopper 309. The limit block 301 is fixedly installed inside the installation groove 202, and a slide groove 302 is opened on one side of the limit block 301. The inner wall of the slide groove 302 is fixedly installed with a slide rod 303. The side surface of the slide rod 303 is slidably connected with the movable block 304. The number of movable blocks 304 is fixed to two. A spring 305 is fixedly installed between the two movable blocks 304. The spring 305 is sleeved on the side surface of the slide rod 303. One side of the movable block 304 is fixedly installed with a first connecting block 306. The first connecting block 306 One side is rotatably connected to a support rod 307, and one end of the support rod 307 is rotatably connected to a second connecting block 308. One end of the second connecting block 308 is fixedly installed with a curved stopper 309. Through the curved stopper 309, a force is applied to the second connecting block 308, and the second connecting block 308 drives the support rod 307 to push the first connecting block 306. The first connecting block 306 drives the movable block 304 to move on the sliding rod 303. The two movable blocks 304 move on the sliding rod 303 to squeeze the spring 305. The impact force is buffered and unloaded by the spring 305, thereby avoiding the situation where the guide vane 5 is damaged by a large collision force when it collides, and the service life is relatively improved.

[0027] The inner walls of the grooves 201 are rotatably connected to the rotating rods 4 .

[0028] The guide vanes 5 are fixedly mounted on the peripheral side of the rotating rod 4 .

[0029] The upper surface of the mounting tube 2 is fixedly mounted with third connecting blocks 6 , and the number of the third connecting blocks 6 is fixed at four.

[0030] A threaded hole 7 is formed on one side of the third connecting block 6 .

[0031] In use, first, the external screw is installed into the threaded holes 7 on the upper part of the two installation cylinders 2, so that the two installation cylinders are fixed on the outer surface of the water pipe body 1, and then the flow impact force drives the flow guide wing 5 and the rotating rod 4 to rotate and swing in the recess 201 when in use, so as to slow down the vortex-induced vibration caused by different flow directions. When the flow guide wing 5 swings left and right, it will hit the arc block 309, the arc block 309 exerts force on the second connecting block 308, the second connecting block 308 drives the supporting rod 307 to push the first connecting block 306, the first connecting block 306 drives the movable block 304 to move on the slide rod 303, the two movable blocks 304 move on the slide rod 303 to press the spring 305, the spring 305 buffers and releases the impact force, avoiding the damage of the flow guide wing 5 caused by the large collision force when hitting, and prolonging the service life.

[0032] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the technicians in the technical field can well understand and use the utility model. The utility model is limited by the claims and the whole scope and equivalents.

Claims

1. A vortex-induced vibration suppression device for a water riser with a rotatable guide vane, comprising a water riser body (1), characterized in that: A mounting tube (2) is provided on the side of the water pipe body (1), the number of the mounting tubes (2) is fixed at two, the outer surface of the mounting tube (2) is provided with a plurality of grooves (201), the inner walls of the grooves (201) are provided with mounting grooves (202), the number of the mounting grooves (202) is fixed at two, and a protective component (3) is fixedly installed inside each of the mounting grooves (202).

2. The riser vortex-induced vibration suppression device with rotatable guide vanes according to claim 1, characterized in that: The protection assembly (3) includes a limit block (301), a slide groove (302), a slide rod (303), a movable block (304), a spring (305), a first connecting block (306), a support rod (307), a second connecting block (308) and an arc-surface stopper (309), wherein the limit block (301) is fixedly installed inside the installation groove (202), a slide groove (302) is provided on one side of the limit block (301), a slide rod (303) is fixedly installed on the inner wall of the slide groove (302), a movable block (304) is slidably connected to the peripheral side surface of the slide rod (303), and the movable block (304) is fixedly installed on the inner wall of the slide groove (302). ) is fixed at two, a spring (305) is fixedly installed between the two movable blocks (304), the spring (305) is sleeved on the peripheral side of the slide bar (303), a first connecting block (306) is fixedly installed on one side of the movable block (304), one side of the first connecting block (306) is rotatably connected to a support rod (307), one end of the support rod (307) is rotatably connected to a second connecting block (308), and one end of the second connecting block (308) is fixedly installed with an arc surface stopper (309).

3. The riser vortex-induced vibration suppression device with rotatable guide vanes according to claim 1, characterized in that: The inner walls of the grooves (201) are rotatably connected to rotating rods (4).

4. The riser vortex-induced vibration suppression device with rotatable guide vanes according to claim 3, characterized in that: A guide wing (5) is fixedly mounted on the peripheral side surface of the rotating rod (4).

5. The riser vortex-induced vibration suppression device with rotatable guide vanes according to claim 1, characterized in that: A third connection block (6) is fixedly mounted on the upper surface of each mounting cylinder (2), and the number of the third connection blocks (6) is fixed at four.

6. The riser vortex-induced vibration suppression device with rotatable guide vanes according to claim 5, characterized in that: A threaded hole (7) is provided on one side of each of the third connecting blocks (6).

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