CN104776292A - Subsea pipeline floating ball type flexible washing protection device - Google Patents
Subsea pipeline floating ball type flexible washing protection device Download PDFInfo
- Publication number
- CN104776292A CN104776292A CN201510150512.0A CN201510150512A CN104776292A CN 104776292 A CN104776292 A CN 104776292A CN 201510150512 A CN201510150512 A CN 201510150512A CN 104776292 A CN104776292 A CN 104776292A
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- Prior art keywords
- float
- protection device
- ball
- pipeline
- buoyancy aid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/123—Devices for the protection of pipes under water
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention discloses a subsea pipeline floating ball type flexible washing protection device. The subsea pipeline floating ball type flexible washing protection device is composed of three or more floating ball protection units, wherein each floating ball protection unit comprises a ballasting block body and a floating small ball; the ballasting block bodies and the floating small balls, and the floating small balls are connected by connection ropes; the floating ball protection units are distributed at the periphery of a subsea pipeline to form a protection layer similar with a porous screen plate. The device has lower construction cost and is very convenient to construct; the whole protection device can be directly thrown into water to construct after being positioned under the conditions that the water flow speed is smaller and the water depth is moderate; the volumes of the small balls are slowly expanded and become large under the water under the condition that the water flow speed or the water depth is larger, so that the offset distance of the whole device is reduced; the mounting precision is improved or the construction can be carried out at the position which has a certain distance from a mounting position; the positioned construction is realized under the action of water flow. The method can be used for effectively reducing the water flow speed at the periphery of silt, accelerating the starting speed of the silt, and improving the anti-washing capability of the silt at the periphery.
Description
Technical field
The invention belongs to Underwater Pipeline Construction and operation technique field, particularly the local scour protective equipment of submerged pipeline under flow action.
Background technique
Submerged pipeline is the critical facility for seabed conveying petroleum resources, and its structural safety is the important topic of Marine oil and gas resource exploitation.The exposed pipeline be layed on sea bed often changes the local flow field structure bottom sea bed, produce the phenomenon such as three-dimensional eddy current and flow turbulence enhancing, such hydrodynamic framework drives the motion of sea bed silt near pipeline further, especially, in chiltern and silt-sandy seabed, strong sediment movement will form local scour hole fast around pipeline.After being formed along the scour hole of pipeline uneven distribution, pipeline generation suspended span.After suspended span length exceedes regulation extreme length, generation significantly bends and lost efficacy by submerged pipeline under Gravitative Loads; In addition, under flow action, suspended span section submerged pipeline rear will form the eddy structure that alternately comes off, when de-whirlpool frequency and line construction natural frequency close to time, will resonate, the vortex-induced vibration of formation pipeline, causes the fatigue damage of submerged pipeline.In Offshore Engineering, the line construction destruction of causing because of submerged pipeline local scour happens occasionally, and both causes damage to engineering itself, and brings the environmental pollutions such as oil spilling again to surrounding sea.Therefore, development of new, practical seabed management scour protection technology has very important engineering significance and using value.
At present, the major technique of submerged pipeline scour protection have grooving, gravel mulch, pipeline from burying, the mode such as water conservancy diversion.Wherein, grooving excavates open channel before referring to pipelining on sea bed, and general dark about 1m, is then placed in groove by pipeline, to prevent local scour and vortex-induced vibration.Because underwater excavation needs high strength people, machine operation, grooving expense is general very high, and is only applicable to more shallow marine site; Utilize the large particle materials such as rubble to cover above pipeline after gravel mulch vial wire routing, form protection, prevent local scour.This method needs a large amount of crushed stone material, and underwater operation is difficult, is often only applicable to short-range local pipeline section; Pipeline is from burying, and utilize current to draw brush to silt near pipeline, form naturally burying of pipeline, this mode does not need any protection when pipelining, saves construction cost, adopts in a large number in a lot of marine site.But the precondition that this method uses is local sea bed soil property and flow condition can be formed effective from burying, in fact, in a lot of marine site of China, the soil property of sea bed can not meet the condition formed from burying.Water conservancy diversion installs flow guide device exactly to guide water (flow) direction on pipeline, but the effect of this method is not clearly, and flow guide device is not generally flexible, easily damages benthon.By the promotion of Marine oil and gas resource exploitation, novel pipeline scour protection technology is constantly had to occur in recent years, such as utilize the sea bed around the protection such as " Artificial grass ", " bionical marine alga " pipeline, pipeline is installed flexible floating curtain cut and husky short to become silted up, below pipeline, lay waterproof plate, wash away to reduce the piping type produced because of pipeline both sides seepage force.These methods embody people in all its bearings to effective trial that submerged pipeline local scour problem is explored, but because actual ocean engineering limits by conditions such as effect, construction cost, construction technology levels, these methods at present and fail to be widely used in Marine oil and gas resource exploitation, urgently develop by novel, more practical pipeline scour protection technology.On the other hand, different pipeline scour protection technology is often applicable to specific sea bed geological condition, flow condition and local raw material supply condition etc., and practical engineering application needs us to propose more how novel, diversified scour protection technological scheme.
Summary of the invention
In order to solve problems of the prior art, the invention provides the flexible scour protection device of a kind of submerged pipeline float-ball type, solve the practical effect poor reliability of the various protectiving scheme of submerged pipeline scour protection technology and the problem of equipment cost work progress somewhat expensive in prior art.
Technological scheme of the present invention is:
The flexible scour protection device of a kind of submerged pipeline float-ball type, protect unit by three to multiple floating ball preventing and form, described ball float protective unit comprises ballast block and buoyancy aid bead, is connected between ballast block and buoyancy aid bead and buoyancy aid bead by connecting rope; Ball float protection cell distribution is arranged at around submerged pipeline, forms the protective coating of similar porous web plate.
The height of described ball float protective unit is 1-2 times of Pipeline Thickness.
Each ball float protective unit is provided with one or more buoyancy aid bead, is connected in series by connecting rope, and the spacing between buoyancy aid bead is 1-2 times of buoyancy aid the small ball's diameter.Described buoyancy aid the small ball's diameter is 10cm-50cm.
The weight of described ballast block is 100kg-1000kg.Described ballast block is by prefabricated concrete or adopt simple and easy sand filling bag.
Described connecting rope adopts resistant material to make, and diameter meets the requirement of buoyancy aid bead maximum pull.
Described buoyancy aid bead adopts lightweight foamed plastics or air bag to make.
By hawser, ballast block is serially connected in linearly by interval between described ball float protective unit, two at the most bar be laid in pipeline both sides, form flexible scour protection curtain.
By hawser, ballast block being carried out vertical and horizontal by interval between described ball float protective unit connects into netted, is laid in above pipeline.
The invention has the beneficial effects as follows: relative to traditional defense scheme and other experimental schemes, the advantage that apparatus of the present invention have is: 1) have good protection effect: the present invention uses for reference the principle that anti-wind net intends dirt, utilize porous web plate dissipation current, exclusion high-velocity flow; To dissipate further flow energy in conjunction with vortex-induced vibration or swing in addition, meet principles of fluid mechanics, effectively can weaken the flow intensity in protective area; 2) construction cost is low: ballast block can be the even simple sand pocket of normal concrete block etc., and connecting rope and ball float can adopt cheap Chemicals, and overall cost is very low; 3) ecological friendly: the flexible travelling impact of device on organism in water is less, in addition, throw the effect that the ballast block fallen apart in bed surface can also play small-sized ecological fish shelter in a large number, become the high-quality habitat of some biology; 4) constructability and maintenance: protection work and pipeline are completely separate, submarine pipeline manufacture, lay time do not need consider how to increase protective equipment, for laying, the pipeline run is applicable equally, can adopt according to field condition in addition and independently lay, linearly lay, nettedly to lay, specifically see embodiment.Owing to adopting the good chemical materials of durability in Protective system, the use of Protective system is very long, and the microwave change in the washing away of each ballast block self, position and orientation does not affect integral protection effect, and therefore, this Protective system does not generally need to safeguard.5) space is further expanded: on some ballast block, wireless water depth sensor is installed, can the local sea bed situation of change of Real-time Feedback.
Apparatus of the present invention not only cost are lower, construct also very convenient, less in water velocity, and directly can be thrown in water by whole protective equipment after positioning when the depth of water is moderate and construct; The volume of bead can be made under water slowly to expand when water velocity is comparatively large or the depth of water is larger and become large, to reduce the offset distance of whole device, improve installation precision or construct in the position of distance mounting point certain distance, utilize the effect of current, reach location construction object.Effectively can reduce the water velocity around silt by this method, increase the toggle speed of silt, improve the erosion resistibility of silt around.
Accompanying drawing explanation
Fig. 1 is the front view that floating ball preventing protection unit that diameter is identical protects for submerged pipeline;
Fig. 2 is the front view of the different floating ball preventing protection unit of diameter for submerged pipeline protective equipment;
Fig. 3 is the protective equipment of the buoyancy aid bead composition that diameter is identical;
Fig. 4 be diameter different buoyancy aid bead composition protective equipment;
Fig. 5 is the flat distribution map that buoyancy aid bead that diameter is identical protects for pipeline;
Fig. 6 is the floor map that the different buoyancy aid bead of diameter protects for pipeline;
Wherein, 1-buoyancy aid bead; 2-connecting rope; 3-submerged pipeline; 4-sea bed; 5-block; The 6-water surface.
Concrete mode of execution
Below in conjunction with accompanying drawing, the present invention is further described.
Know-why of the present invention is: utilize a series of ball float along install pipeline, form the porous medium barrier to current, reduce flow rate of water flow of the nearly end, and current incoming flow is at a high speed squeezed upward, reduce the sediment incipient motion near pipeline, form the effect of similar land windproof plan dirt net; In addition, current flow through ball float and whirlpool body are streamed in formation, and cause vortex-induced vibration or the swing of ball float, and can effectively dissipate flow energy, reach the object reducing pipeline local scour.
Apparatus of the present invention are protected unit by three to multiple floating ball preventing and are formed, and each ball float protective unit forms primarily of three parts: ballast block, connecting rope, buoyancy aid bead.Each several part constitute and function is: 1. ballast block: block mainly plays ballast fixation, whole block and buoyancy aid bead is connected with bridle line and sinks to the position in order to fixing buoyancy aid bead among sea bed.Kentledge body weight is generally 100kg-1000kg, specifically determines according to the gross buoyancy of top buoyancy aid.Ballast block can, by prefabricated concrete, also can adopt simple and easy sand filling bag to replace.Ballast block will form local scour under flow action, form ballast block and naturally sink and bury.2. connecting rope: in order between connection block and buoyancy aid bead and each ball float, them are made to have integrity to strengthen protection effect, for avoiding seawater corrosion, do not adopt steel or the irony ropes such as rope chain, corrosion-resistant nylon or other material should be adopted to make, and its diameter meets the requirement of ball float maximum pull.3. buoyancy aid bead: the diameter of buoyancy aid bead is determined according to concrete required situation, is generally 10cm-50cm, sphere diameter can identically also along water depth ratio, can be determined after concrete hydrodynamic calculations analysis optimized protection effect.Buoyancy aid bead is the core of a whole set of protective equipment, and its protective range is approximately 2-3 times of the scope of washing away, and protection height is 1-2 times of Pipeline Thickness.Buoyancy aid bead can adopt lightweight foamed plastics to make, and also can adopt air bag, forms available buoyancy.
The making of device: 1. ballast block: by prefabricated concrete, makes torsion-bending ratio or is with pertusate ecological fish shelter block; As local sand material is enriched, simple and easy sand filling bag can be adopted to replace, reduce cost further.2. connecting rope: adopt corrosion-resistant nylon or other material to make, its diameter meets the requirement of ball float maximum pull.3. buoyancy aid bead: adopt lightweight foamed plastics to make, also can adopt air bag, form available buoyancy.
Cable laying operation scheme: according to differences such as flow rate of water flow when the local depth of water, sea bed substrate condition, construction, different laying scheme can be adopted.1. location-independent is laid: by the ball float scour protection device made under workboat is thrown, device free settling, or slip into the bottom by conduit under water, the two row or multi-row ball float queue of formation rule arrangement, this mode is applicable to more shallow marine site (as the depth of water is less than 20m), and flow rate of water flow during construction should not be too large, otherwise block drifts about in infall process, is difficult to location; 2. independent random is laid: by the ball float scour protection device made under workboat is thrown, device free settling, lays at random in the certain limit of pipeline both sides, forms overall flexibility scour protection band; In this manner, ballast carrier must adopt flexible sand filling bag, in order to avoid injure pipeline by a crashing object when block lands; 3. linear orientation is laid: be connected in series by hawser at regular intervals by the ball float scour protection device made, be then applied to pipeline both sides by boats and ships by two or more pieces simultaneously, form flexible scour protection curtain; 4. nettedly to lay: the ball float scour protection device made is carried out vertical and horizontal connection by hawser at regular intervals, then be laid in above pipeline by boats and ships with one fixed width (general 5m-10m), ballast is formed to pipeline, play the effect of similar shelter forest simultaneously, suppress the formation of local scour around pipeline.
Above with reference to drawings and Examples, to invention has been schematic description, this description is not restricted.Those of ordinary skill in the art will be understood that in actual applications, and in the present invention, some change all may occur the set-up mode of each parts, and other staff also may make the similar Design of various ways under its enlightenment.It is pointed out that only otherwise depart from design aim of the present invention, all apparent changes and similar Design thereof, be all included within protection scope of the present invention.
Claims (9)
1. the flexible scour protection device of submerged pipeline float-ball type, it is characterized in that, protect unit by three to multiple floating ball preventing to form, described ball float protective unit comprises ballast block and buoyancy aid bead, is connected between ballast block and buoyancy aid bead and buoyancy aid bead by connecting rope; Ball float protection cell distribution is arranged at around submerged pipeline, forms the protective coating of similar porous web plate.
2. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, is characterized in that, the height of described ball float protective unit be the 1-2 of Pipeline Thickness doubly.
3. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, it is characterized in that, each ball float protective unit is provided with one or more buoyancy aid bead, buoyancy aid the small ball's diameter is 10cm-50cm, be connected in series by connecting rope, the spacing between buoyancy aid bead is 1-2 times of buoyancy aid the small ball's diameter.
4. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, it is characterized in that, the weight of described ballast block is 100kg-1000kg.
5. the flexible scour protection device of submerged pipeline float-ball type according to claim 4, it is characterized in that, described ballast block is by prefabricated concrete or adopt simple and easy sand filling bag.
6. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, it is characterized in that, described connecting rope adopts resistant material to make, and diameter meets the requirement of buoyancy aid bead maximum pull.
7. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, it is characterized in that, described buoyancy aid bead adopts lightweight foamed plastics or air bag to make.
8. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, it is characterized in that, by hawser, ballast block is serially connected in linearly by interval between described ball float protective unit, two at the most bar be laid in pipeline both sides, form flexible scour protection curtain.
9. the flexible scour protection device of submerged pipeline float-ball type according to claim 1, is characterized in that, by hawser, ballast block is carried out vertical and horizontal and connect into netted, be laid in above pipeline between described ball float protective unit by interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510150512.0A CN104776292A (en) | 2015-03-31 | 2015-03-31 | Subsea pipeline floating ball type flexible washing protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510150512.0A CN104776292A (en) | 2015-03-31 | 2015-03-31 | Subsea pipeline floating ball type flexible washing protection device |
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| Publication Number | Publication Date |
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| CN104776292A true CN104776292A (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510150512.0A Pending CN104776292A (en) | 2015-03-31 | 2015-03-31 | Subsea pipeline floating ball type flexible washing protection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109140047A (en) * | 2018-09-06 | 2019-01-04 | 河海大学 | A kind of submarine pipeline reducing sand sea bed Wave function influence |
| CN110886903A (en) * | 2019-11-11 | 2020-03-17 | 武汉理工大学 | Rubber hose laying device |
| CN111271513A (en) * | 2020-01-21 | 2020-06-12 | 葫芦岛市海陆测绘有限公司 | Visualized positioning and guiding method for submarine cable management |
| CN111516834A (en) * | 2020-04-21 | 2020-08-11 | 中国船舶科学研究中心 | Seabed raise dust and silt suppression device |
| CN113502741A (en) * | 2021-06-15 | 2021-10-15 | 哈尔滨工业大学 | Structure for inhibiting vortex-induced vibration of cylindrical structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109140047A (en) * | 2018-09-06 | 2019-01-04 | 河海大学 | A kind of submarine pipeline reducing sand sea bed Wave function influence |
| CN109140047B (en) * | 2018-09-06 | 2020-07-17 | 河海大学 | Submarine pipeline for reducing influence of wave action in sandy soil seabed |
| CN110886903A (en) * | 2019-11-11 | 2020-03-17 | 武汉理工大学 | Rubber hose laying device |
| CN111271513A (en) * | 2020-01-21 | 2020-06-12 | 葫芦岛市海陆测绘有限公司 | Visualized positioning and guiding method for submarine cable management |
| CN111271513B (en) * | 2020-01-21 | 2021-08-31 | 葫芦岛市海陆测绘有限公司 | Visualized positioning and guiding method for submarine cable management |
| CN111516834A (en) * | 2020-04-21 | 2020-08-11 | 中国船舶科学研究中心 | Seabed raise dust and silt suppression device |
| CN113502741A (en) * | 2021-06-15 | 2021-10-15 | 哈尔滨工业大学 | Structure for inhibiting vortex-induced vibration of cylindrical structure |
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Application publication date: 20150715 |