CN209856501U - Submarine pipeline suspended span vortex-induced vibration suppression device based on quality control - Google Patents
Submarine pipeline suspended span vortex-induced vibration suppression device based on quality control Download PDFInfo
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- CN209856501U CN209856501U CN201920561394.6U CN201920561394U CN209856501U CN 209856501 U CN209856501 U CN 209856501U CN 201920561394 U CN201920561394 U CN 201920561394U CN 209856501 U CN209856501 U CN 209856501U
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- suppression device
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Abstract
The utility model discloses a submarine pipeline suspended span vortex induced vibration suppression device based on quality control, including setting up two semicircle arc type gasbag supports at submarine pipeline body surface and the helping of setting two symmetries on semicircle arc type gasbag support float the gasbag, all set up gasbag tip rectification piece at the tip of two helping the gasbag that float. Compared with the prior art, the utility model has the positive effects that: the utility model discloses on deepening the basis that analysis submarine pipeline vortex induced vibration formed the mechanism, combine submarine pipeline in lay, the actual existence nature of freely dangling striding in the operation, from the reduction system quality, set up the submarine pipeline freely dangling strides vortex induced vibration suppression device that is convenient for install and retrieve, can satisfy the water flow direction change, can restrain the swirl and generate. The utility model is suitable for a submarine oil gas pipeline's span vortex induced vibration protection, prefabricated material all is in factory production, and simple and easy installation work is accomplished on the scene.
Description
Technical Field
The utility model relates to a submarine pipeline suspended span vortex induced vibration suppression device based on quality control.
Background
In marine oil and gas production, subsea pipelines are important channels for transporting oil and gas. In the laying process of the submarine pipeline, due to the unevenness of the seabed, part of the pipeline section is in a suspended state; once the span length exceeds a critical length, the subsea pipeline may experience vortex induced vibrations induced by the flow of water around the pipeline, causing resonance and, in extreme cases, threatening pipeline safety.
Many researches show that the pipeline span length is reduced in a reliable mode to increase the natural frequency of a pipeline system, so that the reliability of the pipeline system can be effectively improved; meanwhile, the problem of vortex-induced vibration can be fundamentally relieved by utilizing the rectifying element to inhibit vortex formation. In addition, the effective mass of the system is reduced, the natural frequency of the system can be improved to a certain degree, and the possibility of vortex-induced vibration is reduced.
In actual engineering, solutions and devices for adding fixed supports to a seabed suspended pipeline, installing rectifying elements on the suspended pipeline and the like are successively proposed and developed in recent years, but the solutions and the devices have the problems of economy, installation performance, bidirectional flow performance and the like to different degrees. For example, the mode of increasing the fixed support to reduce the free span distance has good effect, but the lower part of the pipeline needs to be filled with solid materials, so the operation is complex and the environmental risk exists; the installation of a rectifier element is a common vortex-induced vibration suppression mode, but in some cases, the problems of inconvenient installation and poor control effect on the bidirectional flow of ocean currents exist. Meanwhile, a vortex-induced vibration suppression scheme from the viewpoint of reducing the system quality is provided at present.
Disclosure of Invention
In order to overcome prior art's shortcoming, the utility model provides a submarine pipeline hangs and strides vortex induced vibration suppression device based on quality control combines the rectification principle through effective weight under the water of the reducing system, reduces submarine pipeline freely in coordination and hangs the risk of striding the destruction.
The utility model adopts the technical proposal that: the submarine pipeline suspended span vortex-induced vibration suppression device based on quality control comprises two semicircular arc-shaped air bag supports arranged on the outer surface of a submarine pipeline body and two symmetrical floating-assisting air bags arranged on the semicircular arc-shaped air bag supports, wherein air bag end rectifying blocks are arranged at the end parts of the two floating-assisting air bags.
Compared with the prior art, the utility model has the positive effects that: the utility model discloses on deepening the basis that analysis submarine pipeline vortex induced vibration formed the mechanism, combine submarine pipeline in laying, the existence reality of freely dangling striding in the operation, from the reduction system quality, set up the submarine pipeline freely dangling strides vortex induced vibration suppression device that is convenient for install and retrieve, can satisfy the rivers change, can restrain the swirl and generate. The utility model is suitable for a submarine oil gas pipeline's span vortex induced vibration protection, prefabricated material all is in factory production, and simple and easy installation work is accomplished on the spot, and the inflation medium is the air, and the at utmost has reduced the site work investment cost, has also strictly limited the environmental protection risk in the installation work, has reached safe, economic effect, and the concrete performance is as follows:
(1) the system has the following effects:
the outer surface of the floating-assistant air bag is prefabricated with a plurality of raised objects which can be used for destroying the stability of a boundary layer when water flow bypasses a submarine pipeline before a rectifying plate is installed and inhibiting the generation of vortexes to a certain extent; the end face of the outer side of the floating-assisting air bag is of a prefabricated triangular solid shaping structure and is not inflatable, and the floating-assisting air bag serves as a rectification shaping piece at the end of the floating-assisting air bag and has the positive effect of inhibiting vortex generation in a rectification mode. The symmetrically arranged floating-assistant air bags can deal with vortex-induced vibration when the flow direction of water at the submarine pipeline changes. The floating-assistant air bag is inflated after being installed in place underwater, air is supplied and metered through a hose connected with the operation ship to control the volume of the air bag, and finally the purpose of controlling the buoyancy of the system is achieved.
(2) Convenient to install
The device is in an uninflated state before installation, and is convenient to convey to a target pipe section; the installation workload is small; all the device elements are prefabricated on the shore, and the offshore operation time is saved.
(3) Convenient to disassemble and recover
Before the submarine pipeline is buried or permanently protected, the device can be quickly exhausted and dismantled for recovery.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of the submarine pipeline suspended span vortex-induced vibration suppression device based on quality control.
Detailed Description
The utility model discloses a submarine pipeline suspended span vortex-induced vibration suppression device based on quality control, which comprises a pipeline body, a floating-assistant air bag, a connecting system, a damping lining and an air bag end rectifying block; the pipeline body comprises a submarine pipeline, a concrete counterweight layer and the like; the floating-assistant air bags comprise two symmetrical rubber air bags, and a plurality of bulges are arranged on the outer surfaces of the two rubber air bags; the connecting system comprises a screw hole at the top of the air bag and a bolt for connecting the air bag; the shock absorption lining comprises flexible filling arranged between the pipeline body and the floating assisting air bag; the air bag end rectifying block comprises a floating-assistant air bag end rectifying and shaping piece with a triangular section. The utility model discloses a to unsettled submarine pipeline installation symmetry whole floating airbag and rectifier cell, through the mode that reduces system's weight, further alleviated submarine pipeline department and hung the vortex-induced vibration problem of striding the pipeline, the device installation is simple, low cost, recoverable used repeatedly, has removed the expense of adopting additional support to overcome interim pipeline and hung the stride from, is applicable to submarine pipeline and hangs the stride temporarily and administer.
The utility model discloses the technical principle who adopts is:
during the laying of a subsea pipeline, due to the unevenness of the seabed, a partial pipe section may hang over after the pipeline is in place. Once the vortex induced vibration frequency caused by the span length approaches the natural frequency of the pipeline system, resonance may be caused, and in extreme cases, pipeline safety is threatened.
Under the condition, the inflatable integral floating airbag is arranged on the outer side of the pipeline with the overlong span length, so that the net gravity of the pipeline at the span section under water can be integrally reduced, and the natural frequency of the span section system is improved. Meanwhile, the floating-assistant air bags are symmetrically arranged, so that the influence control of periodic incoming flow at two sides of the pipeline on the suspended span pipe section can be met. In addition, the floating assisting air bag body is in a streamline design, the effects of rectifying the boundary layer and reducing the vibration caused by water flow can be additionally achieved, and the stability of the system is further improved.
It should be noted that the utility model discloses be applied to the buoyancy adjustment of local, big span pipeline, it is minimum to the influence of whole pipeline system stability in place.
The following description of the specific structure of the present invention with reference to fig. 1 is as follows:
a submarine pipeline suspended span vortex-induced vibration suppression device based on quality control, as shown in fig. 1, comprising: the device comprises an air bag support 1, an air bag support 2, an inner cushion layer 3, a floating-assistant air bag 4, a floating-assistant air bag 5, a reinforced connection 6, an upper support bolt 7, a lower support bolt 8, a floating-assistant air bag valve 9, a floating-assistant air bag valve 10, an air bag end rectifying block 11 and an air bag end rectifying block 12.
Wherein:
the air bag support system is composed of an air bag support 1, an air bag support 2, an inner cushion layer 3, an upper support bolt 7 and a lower support bolt 8 and is used for connecting the two sides of the fixed air bag system and then fixing the fixed air bag system on a submarine pipeline, and the fixed air bag system is detached and dismantled before recovery.
In particular, the amount of the solvent to be used,
1) during installation of a subsea pipeline, one or more of the present devices are considered for installation in a free span, lengthy pipe section after the pipeline is in place on the seabed.
2) When the air bag support is installed, the two semicircular air bag supports 1 and the air bag support 2 are mutually connected through the upper support bolt 7 and the lower support bolt 8 and are fixed on a submarine pipeline, and the inner cushion layer 3 is inserted between the inner side of each support and the outer surface of the submarine pipeline, so that the tightness is adjusted and the friction force is increased.
3) When the air bag bracket is installed, the floating assisting air bag 4 and the floating assisting air bag 5 are not inflated, and the exhaust form is kept so as to facilitate the bolt connection.
4) When the air bag bracket is installed, the bulge on the outer surface of the uninflated floating-assistant air bag can disturb the flow boundary layer to a certain extent, and the effect of relieving vibration is achieved.
5) The length of the support in the axial direction of the pipeline is 1 m/support, and the support can be continuously installed.
Wherein:
the floating-assistant air bag 4, the floating-assistant air bag 5, the reinforced connection 6, the floating-assistant air bag valve 9, the floating-assistant air bag valve 10, the air bag end rectifying block 11 and the air bag end rectifying block 12 form an air bag system, and are responsible for reducing the quality of a span pipe section during the temporary span of a pipeline, generating a certain water flow boundary layer disturbance effect and comprehensively playing a role in relieving vortex-induced vibration.
In particular, the amount of the solvent to be used,
1) the floating assisting air bag is made of thin-wall reinforced rubber, and is designed in a light weight mode; the floating-assistant air bag 4 is connected with the air bag bracket 1 in a prefabricated way, the performance is enhanced by adopting a reinforced connecting piece 6, and the connecting points are the upper side and the lower side; the floating-assistant air bag 5 is connected with the air bag bracket 2 in a prefabricated way, and the performance is enhanced by adopting the same reinforced connecting piece; the reinforcing connecting piece 6 is prefabricated continuously in the axial direction.
2) After the air bag bracket is installed on the pipeline, connecting the water inflation equipment with the floating-assistant air bag valve 9 and the floating-assistant air bag valve 10 by using hoses, and filling air according to the designed inflation volume;
3) after inflation, the floating-aid air bag valve 9 and the floating-aid air bag valve 10 are closed.
4) The air bag end rectifying block 11 and the air bag end rectifying block 12 at the end part of the floating-assistant air bag are solid hard plastic triangular reinforcing blocks, and the included angle between the upper side and the lower side is less than 60 degrees, so that the functions of air bag form control and primary flow diversion of water flow at two sides are achieved; the rectifying block at the end part of the air bag is connected with the floating-assistant air bag in a prefabricated manner in a factory.
5) A pressure gauge mounting socket can be reserved on the air bag, and a diver monitors the pressure difference inside and outside the air bag in the process of matching with the offshore inflation operation.
Therefore, the suspended span vortex-induced vibration suppression device for the submarine pipeline based on quality control is formed, and the principle is as follows: after water flows transversely to the submarine pipeline, the water flows are firstly divided at the rectifying block at the end part of the air bag, when upward flows and downward flows are raised on the surface of the floating-assistant air bag, the boundary layer is further disturbed, and when the water flows to the position near the pipeline body, no vortex is generated basically. The volume of the floating-assistant air bag is controlled by calculating the inflation quantity, so that the vortex-induced vibration effect and the pipeline in-place stability effect can be balanced to the maximum extent. Before the pipeline is ready to be buried, the air bag gas is released, the bolt is released, and the device is recovered.
Claims (10)
1. The utility model provides a submarine pipeline suspended span vortex induced vibration suppression device based on quality control which characterized in that: the submarine pipeline floating assisting device comprises two semicircular arc airbag supports arranged on the outer surface of a submarine pipeline body and two symmetrical floating assisting airbags arranged on the semicircular arc airbag supports, wherein airbag end rectifying blocks are arranged at the end parts of the two floating assisting airbags.
2. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: a damping lining is arranged between the outer surface of the submarine pipeline body and the floating assisting air bag.
3. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: the upper parts and the lower parts of the two semicircular arc-shaped air bag brackets are connected through bolts.
4. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: the floating-assistant air bag and the air bag bracket are connected in a prefabricated mode through a reinforced connecting piece.
5. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: the floating assisting air bag body is streamline, and a bulge is arranged on the outer surface of the floating assisting air bag body.
6. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: and a valve is arranged on the floating assisting air bag and is connected with the water inflation equipment through a hose.
7. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: the rectifying block at the end part of the air bag is a solid triangular hard plastic reinforcing block.
8. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 7, wherein: the included angle between the rectifying block at the end part of the air bag and the upper edge and the lower edge of the floating-assistant air bag is less than 60 degrees.
9. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: a pressure gauge mounting socket is reserved on the floating assisting air bag.
10. The subsea pipeline suspended span vortex induced vibration suppression device based on quality control of claim 1, characterized by: the length of the air bag support in the axial direction of the pipeline is 1 m/air bag support, and the air bag support can be continuously installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920561394.6U CN209856501U (en) | 2019-04-23 | 2019-04-23 | Submarine pipeline suspended span vortex-induced vibration suppression device based on quality control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920561394.6U CN209856501U (en) | 2019-04-23 | 2019-04-23 | Submarine pipeline suspended span vortex-induced vibration suppression device based on quality control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209856501U true CN209856501U (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920561394.6U Active CN209856501U (en) | 2019-04-23 | 2019-04-23 | Submarine pipeline suspended span vortex-induced vibration suppression device based on quality control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209856501U (en) |
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2019
- 2019-04-23 CN CN201920561394.6U patent/CN209856501U/en active Active
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Effective date of registration: 20210219 Address after: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee after: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: No. 6, Sichuan hi tech Zone, sublime Road, Chengdu, Sichuan Patentee before: CHINA PETROLEUM ENGINEERING & CONSTRUCTION Corp. |