CN117267465B - Submarine pipeline system with diversion protection structure and installation method - Google Patents
Submarine pipeline system with diversion protection structure and installation method Download PDFInfo
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- CN117267465B CN117267465B CN202311197500.4A CN202311197500A CN117267465B CN 117267465 B CN117267465 B CN 117267465B CN 202311197500 A CN202311197500 A CN 202311197500A CN 117267465 B CN117267465 B CN 117267465B
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- 238000009434 installation Methods 0.000 title claims description 42
- 238000000034 method Methods 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000007480 spreading Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 4
- 238000009991 scouring Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
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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
- F16L1/16—Laying or reclaiming pipes on or under water on the bottom
-
- 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
- F16L1/20—Accessories therefor, e.g. floats, weights
-
- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
The invention discloses a main pipe, sub-pipes and a protection system, wherein the main pipe, the sub-pipes and the protection system are paved on a seabed, the sub-pipes are two and are separately arranged on two sides of the main pipe, the protection system comprises a flexible guide plate, and the flexible guide plate comprises two guide parts which are separately arranged on the outer sides of the two sub-pipes. The current submarine pipeline system is improved, disturbance to submarine pipelines can be reduced, pressure difference on two sides of a main pipe is reduced, so that a good flow picking effect is achieved on fluid below a horizontal axis of the main pipe, disturbance of water flow and wake vortex on the top of the main pipe is reduced, the purposes of reducing pipeline vibration and peripheral seabed flushing are achieved, and finally important economic loss and environmental pollution caused by leakage of media are avoided.
Description
Technical Field
The invention relates to submarine pipeline protection technology, in particular to a submarine pipeline system with a diversion protection structure and an installation method.
Background
Submarine pipelines are key equipment essential for exploitation and transportation of ocean oil and gas, and are called as offshore lifelines. In recent years, in order to solve the problem that a single pipeline is difficult to stop and restart, a novel submarine oil pipeline, namely a primary and secondary pipeline, has been developed, and the most common primary and secondary pipeline consists of a large pipeline and a small pipeline, wherein the large pipeline and the small pipeline are parallel to each other, the small pipeline is arranged right above the large pipeline, the large pipeline and the small pipeline are parallel to each other, and the small pipeline is arranged right above the large pipeline. At present, most of laid submarine pipelines are directly exposed in the submarine environment, and the submarine pipelines on the sandy bed surface are affected by incoming flow, so that scouring and suspension are easy to generate vortex-induced vibration, and the vortex-induced vibration of the suspended span pipe section is an important factor for causing fatigue damage of the pipeline structure. Compared with a single pipeline, the primary and secondary pipelines have larger water blocking area and stronger interference to water environment, so that local scouring and suspension are easier to occur around the seabed, vortex-induced vibration is easier to be induced to cause crude oil or natural gas leakage, and great economic loss and environmental pollution are caused.
At present, the protection measure of the submarine pipeline is generally realized by arranging a rigid guide plate above the pipeline, but because of the installation of the rigid guide plate, the problems of increasing the disturbance intensity of water flow and wake vortex at the upper part of the pipeline, causing the vibration of the pipeline, increasing the stress of the pipeline, causing the scouring of the downflow bed surface of the pipeline and the like exist.
Therefore, the inventor bears the national project 'seafloor primary and secondary pipeline scouring and accumulating evolution mechanism research (project (stand) number: ZR2022QE 200)', is used for solving the technical problems, improves the existing seafloor pipeline system based on the project, can reduce disturbance on a seafloor pipeline, is used for reducing pressure difference on two sides of a main pipe, and plays a good role in picking up fluid below the horizontal axis of the main pipe, thereby reducing disturbance of water flow and wake vortex on the top of the main pipe, achieving the purpose of reducing pipeline vibration and peripheral seafloor scouring, and finally avoiding great economic loss and environmental pollution caused by leakage of medium.
Disclosure of Invention
In view of the above, the invention aims to provide a submarine pipeline system with a diversion protection structure and an installation method thereof, which can reduce disturbance to submarine pipelines, and is used for reducing pressure difference at two sides of a main pipe, thereby playing a good role in picking up fluid below a horizontal axis of the main pipe, reducing disturbance of water flow and wake vortex at the top of the main pipe, achieving the purpose of reducing pipeline vibration and peripheral seabed flushing, and finally avoiding great economic loss and environmental pollution caused by leakage of medium.
The invention relates to a submarine pipeline system with a diversion protection structure, which comprises a main pipe, two sub-pipes and a protection system, wherein the main pipe, the sub-pipes and the protection system are paved on the seabed, the sub-pipes are two and are respectively arranged on two sides of the main pipe, the protection system comprises a flexible diversion plate, the flexible diversion plate comprises two diversion parts respectively arranged on the outer sides of the two sub-pipes, the sub-pipes are arranged on two sides of the bottom of the main pipe, and meanwhile, the flexible diversion plate is arranged at the bottom of the pipeline system, so that pipeline vibration and scouring of the seabed surface can be reduced, and a good diversion effect can be achieved on fluid below a horizontal axis of the main pipe.
The flexible guide plates comprise a plurality of first flexible guide plates and a plurality of second flexible guide plates, the protection system further comprises a plurality of connecting clamping sleeves, the connecting clamping sleeves are arranged in parallel along the length direction to fix the sub-pipe on the main pipe and are used for fixing the corresponding first flexible guide plates, the guide parts comprise first guide parts I and second guide parts II, the first flexible guide plates respectively correspond to the first guide parts I and the first guide parts II, the second flexible guide plates are located between the adjacent first flexible guide plates and are arranged at the bottoms of the main pipe and the sub-pipe, and the guide parts further comprise second guide parts I and second guide parts II, wherein the second flexible guide plates extend to the transverse sides to form the second guide parts I and the second guide parts II. The first flexible guide plate and the second flexible guide plate are arranged at the bottom of the pipeline system along the installation direction of the pipeline, so that the pressure difference at two sides of the pipeline can be reduced, and piping in a wake area of a main pipe and scouring of surrounding seabed surfaces can be prevented when the pressure difference at two sides of the submarine pipeline is reduced to a critical value.
Further, the connection cutting ferrule is provided with and is responsible for mounting hole and sub-pipe mounting hole, be responsible for and sub-pipe are fixed with sub-pipe mounting hole respectively corresponding to inserting in and are responsible for mounting hole and sub-pipe mounting hole, the horizontal both sides of connection cutting ferrule are close to the bottom and are equipped with the guide plate mounting groove respectively, first guide part I and first guide part II correspond respectively install in the guide plate mounting groove of connection cutting ferrule both sides, be responsible for the radian of mounting hole and sub-pipe mounting hole and confirm according to being responsible for and the sub-pipe buries the degree of depth of seabed face under the dead weight condition, can be so that be responsible for and the sub-pipe better buries in the seabed, avoid being responsible for and producing the clearance between sub-pipe and the seabed, the connection cutting ferrule can provide tensile and reinforcement effect for being responsible for and sub-pipe, further improves the protective effect to being responsible for and sub-pipe.
Furthermore, the guide plate mounting groove is a wedge-shaped opening groove with a small outside and a large inside, and wedge-shaped seats for being embedded into the guide plate mounting groove are respectively arranged at the root parts of the first guide part I and the first guide part II; the structure that first water conservancy diversion portion I and first water conservancy diversion portion II link to each other with the wedge seat outside is streamline structure, under the ocean current effect, streamline structure can play the effect of choosing the class, can choose the top of first flexible guide plate and connection cutting ferrule with the upstream water flow for the better sea floor surface of cover of first flexible guide plate reduces silt transportation, thereby prevents the emergence of main pipe and sub-pipe low reaches piping and erodeing, can protect the seabed of main pipe and sub-pipe below.
Further, the second flexible guide plate further comprises a base, a main pipe installation position for placing a main pipe and a sub pipe installation position for placing a sub pipe are arranged on the base, the second guide part I and the second guide part II are respectively fixed on the two transverse sides of the base correspondingly, the second guide part I and the second guide part II are streamline structures, and under the action of ocean currents, streamline shapes can play a role in picking up currents.
Further, wedge open slot side direction opening and axial one end are sealed, and the other end is used for embedding wedge seat, wedge open slot is sealed with the wedge along length direction's one end, and the wedge open slot can be one end and seal and one end opening or both ends all open-ended structure along length direction's both sides, installs first water conservancy diversion portion I and first water conservancy diversion portion II behind the wedge open slot, seals with the wedge, can prevent that first flexible guide plate from following length direction and remove.
Further, the main pipe installation position and the sub pipe installation position are respectively upward arc-shaped grooves which are matched with the radian of the main pipe and the radian of the sub pipe, two clamp holes are transversely arranged on the base in parallel, and when the pipeline system is placed on a seabed, one clamp piece sequentially penetrates through the two clamp holes to fix the second flexible guide plate, the main pipe and the sub pipe. The radian of the arc-shaped groove is determined according to the depth of the main pipe and the sub pipe buried into the seabed under the dead weight condition, so that the main pipe and the sub pipe can be better buried into the seabed, and gaps are avoided between the main pipe and the sub pipe and the seabed.
Further, the pipe diameter ratio of the sub pipe to the main pipe is 0.2-0.5, the pipe diameter ratio of the lengths of the first flexible guide plate and the second flexible guide plate to the main pipe is 1-3, the pipe diameter ratio of the transverse dimension of the first guide part I and the first guide part II to the main pipe is 2-6, and the pipe diameter ratio of the transverse dimension of the second guide part I and the second guide part II to the main pipe is 2-6.
Further, the outside of connecting the cutting ferrule is convex structure, the radius of convex structure is than the main pipe radius ratio: 1-2, wherein the transverse dimension of the main pipe installation position and the pipe diameter ratio of the sub-pipe installation position are respectively 0.5-1 and 0.2-0.7, and the circular arc structure can better pick the upstream incoming flow above the main pipe and guide the vortex of the tail flow area at the rear of the main pipe into the downstream, so that the vibration of the pipeline in the horizontal direction caused by the water flow effect is reduced.
The invention also discloses a method for installing the submarine pipeline system with the diversion protection structure, which comprises the following steps:
s1, arranging a main pipe and a sub pipe according to set positions, fixing the main pipe and the sub pipe relatively, and fixing a flexible guide plate at the set positions relative to the main pipe and the sub pipe;
s2, spreading the fixed main pipe, the fixed sub-pipe and the flexible guide plate on the seabed.
Further, the flexible guide plates comprise a plurality of first flexible guide plates and a plurality of second flexible guide plates, and the plurality of first flexible guide plates are fixed on the main pipe and the sub-pipe through a plurality of corresponding connecting clamping sleeves; the second flexible guide plates are positioned between the adjacent first flexible guide plates and are arranged at the bottoms of the main pipe and the sub-pipe;
further, the second flexible guide plate comprises a base, two clamp holes are transversely arranged on the base in parallel, and a main pipe installation position and a sub pipe installation position for placing a main pipe are arranged on the base;
in step S1, a plurality of connecting ferrules are arranged in parallel along the length direction to fix the sub-tube to the main tube and to fix the corresponding first flexible guide plate, and a clip member sequentially passes through two clip holes to fix the second flexible guide plate, the main tube and the sub-tube;
further, the method comprises the following steps:
s3, taking out the clamping piece;
further, the clamp piece comprises a main body for fixing the main pipe in a sleeved mode and clamp wings fixed on two sides of the main body, wherein the clamp wings are coated above the sub-pipe and extend downwards to form an inclined part, and the inclined part is pressed with an inclined surface formed on the outer side of a sub-pipe installation position on the base;
further, the upper portion of clamp spare can lock or open, the clamp hole on the base is two sets of both ends that correspond to the base respectively and the clamp hole is at the tip opening of base.
Further, the transverse dimension of the bottom of the inclined plane and the pipe diameter ratio of the main pipe are 0.1-0.5, the inclined plane is of a wedge-shaped structure, and the connecting line included angle between the bottom of the inclined plane and the center of the main pipe is 30 degrees, so that the inclined angle of the inclined plane can better play a role in picking up the downstream water flow for flushing the main pipe and the sub-pipe.
The invention has the beneficial effects that: according to the submarine pipeline system with the diversion protection structure and the installation method, the structure that the subducting is arranged at the two sides of the main pipeline is adopted, the diversion plates are arranged at the outer sides of the subducting, the diversion plates are gradually reduced from the two sides of the main pipeline to the integrated structure through the subducting, the water flow can be effectively slowed down, the disturbance suffered by the submarine pipeline and the pressure difference at the two sides of the main pipeline are reduced, so that the fluid below the horizontal axis of the main pipeline is well and slowly chosen, the disturbance of the water flow and wake vortex at the top of the main pipeline is reduced, the purposes of reducing pipeline vibration and peripheral seabed flushing are achieved, and the serious economic loss and environmental pollution caused by medium leakage are finally avoided.
Drawings
The invention is further described below with reference to the accompanying drawings and examples:
FIG. 1 is a schematic view of a first flexible baffle and main and sub-tubes;
FIG. 2 is a schematic view of a second flexible baffle and main and sub-tubes;
FIG. 3 is a schematic view of a first flexible baffle;
FIG. 4 is a schematic view of a second flexible baffle;
FIG. 5 is a schematic view of the structure of the connecting ferrule;
FIG. 6 is a schematic structural view of the clip member;
FIG. 7 is a schematic illustration of preferred dimensions of the first flexible baffle, main tube and sub-tube;
FIG. 8 is a schematic diagram of preferred dimensions of the second flexible baffle, main tube and sub-tube.
Detailed Description
Fig. 1 is a schematic structural view of the present invention, fig. 1 is a schematic structural view of a first flexible baffle and main and sub-pipes, fig. 2 is a schematic structural view of a second flexible baffle and main and sub-pipes, fig. 3 is a schematic structural view of the first flexible baffle, fig. 4 is a schematic structural view of the second flexible baffle, fig. 5 is a schematic structural view of a connecting ferrule, fig. 6 is a schematic structural view of a clip member, fig. 7 is a schematic preferred size of the first flexible baffle, main and sub-pipes, and fig. 8 is a schematic preferred size of the second flexible baffle, main and sub-pipes; as shown in fig. 1-8: the submarine pipeline system with the diversion protection structure and the installation method thereof comprise a main pipe 1, two sub-pipes 3 and a protection system, wherein the main pipe 1, the sub-pipes 3 and the protection system are paved on the seabed, the sub-pipes 3 are respectively arranged on two sides of the main pipe 1, the protection system comprises a flexible diversion plate, and the flexible diversion plate comprises two diversion parts respectively arranged on the outer sides of the two sub-pipes 3; the sub-pipes are respectively and correspondingly arranged at the left side and the right side of the main pipe, the pipe diameter of each sub-pipe is smaller than that of the main pipe, when the main pipe 1 is tangent to the sub-pipe 3, the included angle between the connecting line of the circle centers of the sub-pipe 3 and the main pipe 1 and the vertical axis of the main pipe 1 is 60 degrees, under the arrangement condition, the protection effect of the sub-pipe on the main pipe is better, in the structure, the main pipe is used for conveying mediums such as natural gas, crude oil and the like, the sub-pipe can be used for conveying submarine pipelines and the like, the laying direction of the submarine pipelines and the length direction of the pipelines are longitudinal, the direction vertical to the length direction is transverse or the width direction, and when the sub-pipes are laid on the seabed, the two outer sides of the sub-pipes are at the two sides and far away from one end of the main pipe; the flexible guide plate is made of flexible materials, such as rubber, the flexible guide plate has enough thickness, the outermost side is preferably of a streamline structure, the guide part is preferably of a streamline flat plate structure and plays a role in guiding or picking up water flow, of course, the flexible guide plate can also be of other shapes, such as a structure that one side close to the main pipe and the sub pipe is protruded and can bear the main pipe and the sub pipe, and one side far away from the main pipe and the sub pipe is of a shape which can cover the seabed, such as triangle, rectangle and the like, and the details are not repeated.
In the prior art, when the submarine pipeline is protected, a passive protection mode and an active protection mode are mainly adopted, the active protection is to increase the burial depth of the pipeline, reduce the influence of the pipeline on an incoming flow field, reduce the occurrence of scouring, and strengthen the burial depth of the pipeline by arranging a rigid guide plate above the pipeline, but the mode increases the disturbance intensity of water flow and wake vortex at the upper part of the pipeline, causes the vibration of the pipeline, increases the stress of the pipeline and causes the scouring of a bed surface at the downstream of the pipeline; according to the invention, a structure that the sub-pipelines are arranged at two sides of the main pipeline is adopted, the guide plates are arranged at the outer sides of the sub-pipelines, the guide plates are gradually reduced from the two sides of the main pipeline to the guide plates through the sub-pipelines, the water flow can be effectively slowed down, the disturbance suffered by the submarine pipeline and the pressure difference at the two sides of the main pipeline are reduced, so that a good slow flow-picking effect is achieved on the fluid below the horizontal axis of the main pipeline, and the disturbance of the water flow at the top of the main pipeline and wake vortex is reduced.
In this embodiment, the flexible guide plates include a plurality of first flexible guide plates 4 and a plurality of second flexible guide plates 6, the protection system further includes a plurality of connection ferrules 2, the plurality of connection ferrules 2 are arranged in parallel along the length direction to fix the sub-tubes 3 to the main tube 1 and are used for fixing the corresponding first flexible guide plates 4, the guide parts include a first guide part i 42 and a first guide part ii 43, which respectively extend towards two lateral sides, of the first flexible guide plates 4, the second flexible guide plates 6 are located between the adjacent first flexible guide plates 4 and are arranged at the bottoms of the main tube 1 and the sub-tubes 3, and the guide parts further include a second guide part i 66 and a second guide part ii 61, which respectively extend towards two lateral sides of the second flexible guide plates 6; the shape of the connecting clamping sleeve 2 is matched with the shape of the main pipe and the sub-pipe after combination, the connecting clamping sleeve 2 is generally of an integral module structure, and is formed by one-step processing, in the structure, the connecting clamping sleeve can also be other mechanical mechanisms to fix the main pipe and the sub-pipe at two sides of the main pipe, the structures of the first diversion part I42 and the first diversion part II 43 are kept consistent, generally of a flat plate structure made of flexible materials, of course, the connecting clamping sleeve can also be of other shapes and can cover the seabed, and in the same way, the second diversion part I66 and the second diversion part II 61 are also of flat plate structures made of flexible materials and can cover the seabed, so that the undershoot force of the incoming flow to the seabed at the upstream of the pipeline can be effectively prevented, and the pressure difference at the two sides of the pipeline is reduced; the first flexible guide plate 4 and the second flexible guide plate 6 are arranged at the bottom of the pipeline system along the installation direction of the pipeline, so that the pressure difference of two sides of the pipeline can be reduced, and piping in a wake zone of a main pipe and scouring of surrounding seabed surfaces can be prevented when the pressure difference of two sides of the submarine pipeline is reduced to a critical value.
In the structure, the first flexible guide plate 4 and the second flexible guide plate 6 are arranged at the bottoms of the main pipe 1 and the sub-pipe 3, namely, between the seabed and the main pipe 1 and the sub-pipe 3, and the first flexible guide plate 4 and the second flexible guide plate 6 are covered on the seabed, so that the seabed at the bottoms of the main pipe 1 and the sub-pipe 3 can be protected, and the fluid below the horizontal axis of the main pipe 1 can be well picked up, so that the water flow and wake vortex disturbance at the top of the main pipe 1 are reduced; the connecting clamping sleeves 2 are arranged at intervals along the length direction of the main pipe 1 and the sub-pipe 3, the preferable interval distance is 3 meters or 5 meters, and the second flexible guide plates 6 are arranged between two adjacent first flexible guide plates 4.
In this embodiment, the connection sleeve 2 is provided with a main pipe mounting hole 21 and a sub pipe mounting hole 23, the main pipe 1 and the sub pipe 3 are respectively inserted into the main pipe mounting hole 21 and the sub pipe mounting hole 23 to be fixed, two lateral sides of the connection sleeve 2 are respectively provided with a guide plate mounting groove 24 near the bottom, and the first guide part i 42 and the first guide part ii 43 are respectively correspondingly mounted in the guide plate mounting grooves 24 at two sides of the connection sleeve 2; the radians of the main pipe mounting holes 21 and the sub pipe mounting holes 23 are determined according to the depth of the main pipe 1 and the sub pipe 3 buried into the seabed under the dead weight condition, so that the main pipe 1 and the sub pipe 3 can be better buried into the seabed, and gaps between the main pipe 1 and the sub pipe 3 and the seabed are avoided; the direction along which the main pipe 1 and the sub-pipe 3 are laid along the seabed is the length direction or the longitudinal direction, the direction perpendicular to the length direction of the main pipe 1 and the sub-pipe 3 is the transverse direction, the first guide parts I42 and the first guide parts II 43 are respectively correspondingly arranged on the guide plate mounting grooves 24 on two sides of the connecting clamping sleeve 2, namely, are respectively positioned on the transverse left side and the right side of the bottoms of the main pipe 1 and the sub-pipe 3, the first guide parts I42 are arranged on the left side along the transverse direction, the first guide parts II 43 are arranged on the right side along the transverse direction, in the embodiment, the left side and the right side are only used for distinguishing the first guide parts I42 and the first guide parts II 43, the directions of the first guide parts II 43 are not limited, and the left side along the transverse direction can be the first guide parts II 43.
In this embodiment, the baffle mounting groove 24 is a wedge-shaped open groove with a small outside and a large inside, and the root parts of the first guide part i 42 and the first guide part ii 43 are respectively provided with a wedge-shaped seat 41 for being embedded into the baffle mounting groove; the root parts of the first diversion part I42 and the first diversion part II 43 are one ends which are in contact with the main pipe 1 and the sub pipe 3, the wedge-shaped opening grooves are used for giving way to the first diversion part I42 and the first diversion part II 43, the wedge-shaped opening grooves are laterally opened, one axial end is closed, the other ends of the wedge-shaped opening grooves are used for being embedded into the wedge-shaped seat 41, one ends of the wedge-shaped opening grooves along the length direction are closed by the wedge-shaped blocks 5, the two sides of the wedge-shaped opening grooves along the length direction can be of structures with one end closed and one end opened or both ends opened, after the first diversion part I42 and the first diversion part II 43 are arranged in the wedge-shaped opening grooves, the wedge-shaped opening grooves are closed by the wedge-shaped blocks 5, the wedge-shaped opening grooves are provided with bottoms along the length direction of the pipeline, the wedge-shaped opening grooves are inserted into the wedge-shaped blocks 5 along the left and right sides of the length direction of the wedge-shaped opening grooves, the first diversion part I42 and the first diversion part II 43 can be prevented from being displaced along the length direction of the main pipe 1, the wedge-shaped opening grooves are separated from the connecting clamp sleeve 2, the shapes of the wedge-shaped seat 41 are matched with the shapes of the wedge-shaped opening grooves, and the first diversion part I42 and the first diversion part II are fixedly connected with the connecting clamp sleeve 2; the structures of the first flow guiding part I42 and the first flow guiding part II 43 connected with the outer side of the wedge-shaped seat 41 are streamline structures 421, under the action of ocean currents, the streamline structures 421 can play a role in picking up the upstream water flow, and the upstream water flow can be picked up to the upper part of the first flexible flow guiding plate 4 and the connecting clamping sleeve 2, so that the first flexible flow guiding plate 4 better covers the seabed surface, sediment transport is reduced, downstream piping and scouring of the main pipe 1 and the sub pipe 3 are prevented, and the seabed below the main pipe 1 and the sub pipe 3 can be protected;
the second flexible guide plate 6 further comprises a base, a main pipe installation position 65 for placing a main pipe and a sub pipe installation position 63 for placing a sub pipe are arranged on the base, and the second guide part I66 and the second guide part II 61 are respectively and correspondingly fixed on two lateral sides of the base; the shape of the base is matched with the shape of the main pipe and the sub pipe after being combined, so that the main pipe and the sub pipe can be borne better, the second flow guiding part I66 and the second flow guiding part II 61 are of streamline plate structures, and streamline shapes can play a role in picking up flows under the action of ocean currents; the second guiding portion i 66 is located on the left side in the transverse direction, the second guiding portion ii 61 is located on the right side in the transverse direction, in this embodiment, the left and right sides are only used for distinguishing the second guiding portion i 66 from the second guiding portion ii 61, and the direction of the second guiding portion i 66 is not limited, and the second guiding portion ii 61 may be located on the left side in the transverse direction.
In this embodiment, the main pipe installation position 65 and the sub pipe installation position 63 are respectively arc grooves which are upward and are adapted to the radian of the main pipe 1 and the sub pipe 3; the radian of the arc-shaped groove is determined according to the depth of the main pipe 1 and the sub pipe 3 embedded into the seabed surface under the dead weight condition, so that the main pipe 1 and the sub pipe 3 are better tightly attached to the second flexible guide plate 6, the second flexible guide plate 6 can be better embedded into the seabed, and gaps between the second flexible guide plate 6 and the seabed are avoided;
two clamp holes 64 are transversely arranged on the base in parallel, and when the pipeline system is placed on the seabed, a clamp piece 7 sequentially penetrates through the two clamp holes 64 and is used for fixing the second flexible guide plate 6, the main pipe 1 and the sub pipe 3; the clamp piece 7 is of a mechanical structure and is used for fixing the main pipe 1, the sub pipe 3 and the second flexible guide plate 6, the clamp piece 7 can be made of flexible iron wires or flexible PVC materials, and the clamp piece 7 can be taken out after the main pipe 1, the sub pipe 3 and the second flexible guide plate 6 are fixed.
In this embodiment, the pipe diameter ratio of the sub-pipe 3 to the main pipe 1 is 0.2-0.5, the pipe diameter ratio of the lengths of the first flexible guide plate 4 and the second flexible guide plate 6 to the main pipe 1 is 1-3, the pipe diameter ratio of the transverse dimensions of the first guide part i 42 and the first guide part ii 43 to the main pipe is 2-6, and the pipe diameter ratio of the transverse dimensions of the second guide part i 66 and the second guide part ii 61 to the main pipe 1 is 2-6; experiments prove that the pipe diameter ratio of the main pipe 1 to the sub pipe 3 is preferably 0.3, and the sub pipe 3 cannot better perform the functions of diversion and diversion when the pipe diameter is too large or too small, and wastes materials; the preferable ratio of the transverse dimension of the first flexible guide plate 4 to the pipe diameter of the main pipe 1 is 2, the transverse direction is the direction vertical to the length direction of the main pipe 1 and the sub-pipe 3, and when the ratio of the transverse dimension of the first flexible guide plate 4 to the pipe diameter of the main pipe 6 to the pipe diameter of the main pipe is too large or too small, the best guide protection effect can not be achieved, the seabed can be protected to a certain extent, and the guide effect of the pipeline system is poor; the ratio of the transverse dimension of the first flow guiding part I42 to the pipe diameter of the main pipe is preferably 4, the ratio of the transverse dimension of the second flow guiding part I66 to the pipe diameter of the second flow guiding part II 61 to the pipe diameter of the main pipe 1 is preferably 4, and when the transverse dimension of the first flow guiding part I42, the transverse dimension of the first flow guiding part II 43, the transverse dimension of the second flow guiding part I66 and the transverse dimension of the second flow guiding part II 61 are too large or too small, no good drainage and flow guiding effect can be achieved.
In this embodiment, the outer portion of the connecting ferrule 2 is a circular arc structure 22, and the ratio of the radius of the circular arc structure 22 to the radius of the main pipe 1 is: 1-2, wherein the transverse dimension of the main pipe installation position 65 and the sub pipe installation position 63 is respectively 0.5-1 and 0.2-0.7 with the pipe diameter ratio of the main pipe 1; the design of the circular arc structure 22 can better pick up the upstream incoming flow above the main pipe 1 and guide the vortex of the tail flow area behind the main pipe 1 into the downstream, so that vibration in the horizontal direction of the pipeline caused by the action of water flow is reduced, and experiments prove that the ratio of the radius of the circular arc structure 22 to the radius of the main pipe 1 is preferably 1.8, when the radian of the circular arc structure 22 is too large, the upstream incoming flow cannot be better picked up above the main pipe 1, and when the radian of the circular arc structure 22 is too small, the scouring of the water flow to the main pipe 1 is increased; the transverse dimensions of the main pipe mounting locations 65 and the sub pipe mounting locations 63 correspond to the pipe diameter ratio of the main pipe 1, preferably 0.75 and 0.5, respectively.
In this embodiment, the installation method of the submarine pipeline system with the diversion protection structure further includes:
s1, arranging a main pipe 1 and a sub pipe 3 according to set positions, relatively fixing the main pipe 1 and the sub pipe 3, and fixedly arranging a flexible guide plate at the set positions relative to the main pipe 1 and the sub pipe 3; the sub-pipes 3 are respectively arranged at two sides of the main pipe 1, the main pipe and the sub-pipes are fixed, the flexible guide plates are of a one-time forming structure made of flexible materials, of course, the flexible guide plates can also be of a split forming structure, preferably of a one-time forming structure, and are of a flat plate structure, and the outer sides of the flexible guide plates are streamline-shaped, so that the flexible guide plates are arranged at the bottoms of the main pipe 1 and the sub-pipes 3, namely, are positioned between the seabed and the main pipe 1 and the sub-pipes 3;
s2, spreading the fixed main pipe 1, the fixed sub-pipes 3 and the flexible guide plates on the seabed; the assembled main pipe 1, the sub pipe 3 and the flexible guide plate are directly placed on the seabed under the action of dead weight, and the flexible guide plate and the sub pipe 3 play a role in guiding and protecting the main pipe.
In this embodiment, the flexible baffle includes a plurality of first flexible baffles 4 and a plurality of second flexible baffles 6, where the plurality of first flexible baffles 4 are fixed on the main pipe 1 and the sub-pipe 3 through a plurality of corresponding connection ferrules 2; the second flexible guide plates 6 are positioned between the adjacent first flexible guide plates 4 and are arranged at the bottoms of the main pipe 1 and the sub-pipe 3; the flexible guide plate is of an integrally formed flat plate structure which is preferably made of flexible materials, the flexible materials can be rubber, the flexible guide plate has enough thickness, the shape of the connecting clamping sleeve is matched with the shape of the main pipe and the sub pipe after being combined, and the connecting clamping sleeve can be of other mechanical structures capable of fixing the main pipe 1 and the sub pipe 3;
the second flexible guide plate 6 comprises a base, two clamp holes 64 are transversely arranged on the base in parallel, and a main pipe installation position 65 and a sub pipe installation position 63 for placing a main pipe are arranged on the base; the clamp holes 64 are respectively and correspondingly arranged between the main pipe installation position 65 and the sub pipe installation position 63, and the radians of the main pipe installation position 65 and the sub pipe installation position 63 are matched with the radians of the main pipe and the sub pipe;
in step S1, a plurality of connecting ferrules 2 are arranged in parallel along the length direction to fix the sub-tube 3 to the main tube 1 and to fix the corresponding first flexible baffle 4, and a clip member 7 sequentially passes through two clip holes 64 to fix the second flexible baffle 6, the main tube 1 and the sub-tube 3; the second flexible guide plates 6 are arranged between two adjacent first flexible guide plates 4, are respectively and sequentially arranged along the length direction of the pipeline, and play a role in guiding and protecting the pipeline;
the method also comprises the following steps:
s3, taking out the clamping piece;
the clamping piece 7 comprises a main body 71 for sleeving and fixing a main pipe and clamping wings 73 fixed on two sides of the main body, wherein the clamping wings 73 are coated above the sub-pipe 3 and extend downwards to form an inclined part, and the inclined part is pressed with an inclined surface 62 formed on the outer side of a sub-pipe mounting position 63 on the base; the material of the clamping piece 7 can be elastic metal material, generally has certain flexibility and high strength, such as organic material or flexible metal material, and is convenient to take out; meanwhile, the circumference of the clamp wing 73 is smaller than that of the sub-pipe 3, and the inclined part on the clamp wing 73 is in clamping connection with the inclined plane 62, so that the upper part of the clamp piece 7 can be opened and can move towards the end part of the base, and the clamp piece can be taken out after moving out of the base; the ratio of the transverse dimension of the bottom of the inclined plane 62 to the pipe diameter of the main pipe 1 is 0.1-0.5, the preferable ratio of the transverse dimension of the bottom of the inclined plane 62 to the pipe diameter of the main pipe 1 is 0.3, the inclined plane 62 is of a wedge-shaped structure, and the connecting angle between the bottom of the inclined plane 62 and the center of the main pipe is 30 degrees, so that the inclined angle of the inclined plane 62 can better play a role in picking up the downstream water flow flushing the main pipe 1 and the sub-pipe 3;
the upper part of the clamping piece 7 can be locked or unlocked, two groups of clamping holes 64 on the base are respectively arranged corresponding to the two ends of the base, and the clamping holes 64 are opened at the end parts of the base; the top of the main body 71 of the clamp piece 7, namely, one end far away from the seabed, is provided with a locking piece 72, the locking piece 72 can be a combination of a bolt and a nut, a mechanical ratchet buckle and the like, after a pipeline system is laid, the locking piece 72 is opened, the main body 71 can be opened, one group of the clamp holes 64 is two, two groups of the clamp holes 64 are respectively arranged at two ends of a base, two ends of the base are longitudinal two ends, and the two ends close to the two ends are opened, so that the clamp piece 7 can be conveniently taken out or put in.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (4)
1. Submarine pipeline system with water conservancy diversion protective structure, its characterized in that: the device comprises a main pipe, two sub-pipes and a protection system, wherein the main pipe, the sub-pipes and the protection system are paved on the seabed, the sub-pipes are two and are respectively arranged on two sides of the main pipe, the protection system comprises a flexible guide plate, and the flexible guide plate comprises two guide parts respectively arranged on the outer sides of the two sub-pipes;
the flexible guide plates are protruded to bear the main pipe and the sub pipe, the streamline flat plate structure is arranged on one side, close to the main pipe and the sub pipe, of the flexible guide plates, the streamline flat plate structure is arranged on one side, far away from the main pipe and the sub pipe, of the flexible guide plates comprises a plurality of first flexible guide plates and a plurality of second flexible guide plates, the protection system further comprises a plurality of connecting clamping sleeves, the shapes of the connecting clamping sleeves are matched with the shapes of the main pipe and the sub pipe after being combined, the plurality of connecting clamping sleeves are arranged in parallel along the length direction to fix the sub pipe on the main pipe and are used for fixing the corresponding first flexible guide plates, the guide parts comprise a first guide part I and a first guide part II, which are respectively corresponding to the first flexible guide plates, the second flexible guide plates are positioned between the adjacent first flexible guide plates and are arranged at the bottoms of the main pipe and the sub pipe, and the second flexible guide plates extend to the transverse two sides to form a second guide part I and a second guide part II;
the connecting clamping sleeve is provided with a main pipe mounting hole and a sub pipe mounting hole, the main pipe and the sub pipe are respectively inserted into the main pipe mounting hole and the sub pipe mounting hole correspondingly to be fixed, guide plate mounting grooves are respectively formed in the two lateral sides of the connecting clamping sleeve and close to the bottom, and the first guide part I and the first guide part II are respectively correspondingly arranged in the guide plate mounting grooves in the two sides of the connecting clamping sleeve;
the guide plate mounting groove is a wedge-shaped opening groove with a small outside and a large inside, and wedge-shaped seats for being embedded into the guide plate mounting groove are respectively arranged at the root parts of the first guide part I and the first guide part II;
the second flexible guide plate further comprises a base, a main pipe installation position for placing a main pipe and a sub pipe installation position for placing a sub pipe are arranged on the base, and the second guide part I and the second guide part II are respectively and correspondingly fixed on the two lateral sides of the base;
the main pipe installation position and the sub-pipe installation position are respectively arc-shaped grooves which are upward and are matched with the radians of the main pipe and the sub-pipe;
two clamp holes are transversely arranged on the base in parallel, and when the pipeline system is placed on the seabed, a clamp piece sequentially penetrates through the two clamp holes and is used for fixing the second flexible guide plate, the main pipe and the sub-pipe;
the pipe diameter ratio of the sub pipe to the main pipe is 0.2-0.5, the pipe diameter ratio of the lengths of the first flexible guide plate and the second flexible guide plate to the main pipe is 1-3, the pipe diameter ratio of the transverse dimension of the first guide part I and the first guide part II to the main pipe is 2-6, and the pipe diameter ratio of the transverse dimension of the second guide part I and the second guide part II to the main pipe is 2-6;
the outside of connecting the cutting ferrule is convex structure, the radius of convex structure is than the main pipe radius ratio: 1-2, wherein the transverse dimension of the main pipe installation position and the sub pipe installation position is respectively corresponding to 0.5-1 and 0.2-0.7 of the pipe diameter ratio of the main pipe.
2. The subsea conduit system with deflector guard structure of claim 1, wherein: the wedge-shaped open slot is laterally opened, one axial end is closed, the other end is used for being embedded into the wedge-shaped seat, and one end of the wedge-shaped open slot along the length direction is closed by a wedge-shaped block.
3. A method of installing a subsea pipeline system with a diversion protection structure, characterized by: submarine pipeline system with diversion protection structure according to any of claims 1-2, comprising the steps of:
s1, arranging a main pipe and a sub pipe according to a set position, fixing the main pipe and the sub pipe relatively, fixing a flexible guide plate at the set position relative to the main pipe and the sub pipe, wherein one side of the flexible guide plate, which is close to the main pipe and the sub pipe, is protruded to bear the main pipe and the sub pipe, and one side of the flexible guide plate, which is far away from the main pipe and the sub pipe, is of a streamline flat plate structure;
s2, spreading the fixed main pipe, the fixed sub-pipe and the flexible guide plate on the seabed.
4. A method of installing a subsea pipeline system with a diversion shield structure according to claim 3, wherein: the flexible guide plates comprise a plurality of first flexible guide plates and a plurality of second flexible guide plates, the first flexible guide plates respectively extend towards the two lateral sides correspondingly to form a first guide part I and a first guide part II, the second flexible guide plates extend towards the two lateral sides to form a second guide part I and a second guide part II, and the plurality of first flexible guide plates are fixed on the main pipe and the sub-pipe through a plurality of corresponding connecting clamping sleeves; the shape of the connecting clamping sleeve is matched with the shape of the main pipe and the sub pipe after being combined, and the second flexible guide plates are positioned between the adjacent first flexible guide plates and are arranged at the bottoms of the main pipe and the sub pipe;
the second flexible guide plate comprises a base, two clamp holes are transversely arranged on the base in parallel, and a main pipe installation position and a sub pipe installation position for placing a main pipe are arranged on the base;
the pipe diameter ratio of the sub pipe to the main pipe is 0.2-0.5, the pipe diameter ratio of the lengths of the first flexible guide plate and the second flexible guide plate to the main pipe is 1-3, the pipe diameter ratio of the transverse dimension of the first guide part I and the first guide part II to the main pipe is 2-6, and the pipe diameter ratio of the transverse dimension of the second guide part I and the second guide part II to the main pipe is 2-6;
the outside of connecting the cutting ferrule is convex structure, the radius of convex structure is than the main pipe radius ratio: 1-2, wherein the transverse dimension of the main pipe installation position and the sub pipe installation position is respectively 0.5-1 and 0.2-0.7 with the pipe diameter ratio of the main pipe;
in the step S1, a plurality of connecting clamping sleeves are arranged in parallel along the length direction to fix the sub-pipe to the main pipe and are used for fixing the corresponding first flexible guide plates, and a clamping piece sequentially penetrates through two clamping holes to fix the second flexible guide plates, the main pipe and the sub-pipe;
the method also comprises the following steps:
s3, taking out the clamping piece;
the clamp piece comprises a main body for fixing the main pipe in an sleeved mode and clamp wings fixed on two sides of the main body, wherein the clamp wings are coated above the sub-pipe and extend downwards to form an inclined part, and the inclined part is pressed with an inclined surface formed on the outer side of a sub-pipe installation position on the base;
the upper portion of clamp spare can lock or open, the clamp hole on the base is two sets of both ends that correspond to the base respectively and the clamp hole is at the tip opening of base.
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| CN202311197500.4A CN117267465B (en) | 2023-09-15 | 2023-09-15 | Submarine pipeline system with diversion protection structure and installation method |
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| CN202311197500.4A CN117267465B (en) | 2023-09-15 | 2023-09-15 | Submarine pipeline system with diversion protection structure and installation method |
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