CN218562407U - Submarine pipeline scour-prevention silt-fall-promoting protection device - Google Patents

Abstract

The protecting device for preventing erosion and promoting silt of the submarine pipeline comprises a pile foundation and a sea pipe, wherein a flow guide transmission structure is arranged on the pile foundation; the water conservancy diversion transmission structure includes: a plurality of steel trusses, a plurality of rigid deflectors and a bottom plate; the system is characterized in that the bottom plate is installed on the pile foundation, the steel trusses are installed on the lower wall surface of the bottom plate, and the rigid guide plates are installed on the upper wall surface of the bottom plate; the utility model relates to a submarine pipeline erodees protection technical field, and the beneficial effect of present case is: through water conservancy diversion transmission structure, solved and covered the riprap layer around the pipeline usually, arrange the pad and promote silt, this type of method is easily under construction, has certain protecting effect, but because the irregularity of riprap itself, the influence to the flow field is unpredictable, also probably appears the phenomenon that the secondary erodees after a period of time, adopts flexible protection means such as artifical grass, bionical marine alga mostly, but this type of means is in the face of high-speed rivers, very easily loses the effect, takes place to destroy the scheduling problem.

Description

Submarine pipeline scour-prevention silt-fall-promoting protection device

Technical Field

The utility model relates to a submarine pipeline erodees protection technical field, specifically is submarine pipeline scour prevention silt protector that falls short.

Background

With the large-scale development of offshore oil and gas in China, pipeline transportation is the most effective transportation mode, at present, a submarine pipeline which is as long as hundreds of millions of kilometers exists in China, and the normal operation of the submarine pipeline is an important guarantee for the safe production of offshore oil and gas fields. After the wharf is built, the influence is caused on the dynamic balance of an underwater flow field adjacent to a submarine pipeline, the motion condition of a local water flow is changed, a flow velocity gradient concentration area in a certain range is formed, soil and silt near the pipeline can flow along with the water flow when the water flow velocity reaches a starting flow velocity, and then the local seabed of the submarine pipeline is scoured, so that the laid submarine pipeline is overhead in suspension span, when the suspension span reaches a certain degree, the pipeline loses the supporting function of the original soil, and the pipeline is buckled and damaged due to the vortex-induced vibration of the pipeline caused by hydrodynamic load, so that the pipeline is broken and oil and gas are leaked, therefore, the novel, efficient and economic submarine pipeline scour protection technology is developed, and the submarine pipeline scour protection device has important engineering application value, and has the following problems:

1. in the traditional submarine pipeline anti-scouring measures, a riprap layer is usually covered around the pipeline, and a pad is arranged to promote silting, so the method is easy to construct and has a certain protection effect, but because the riprap is irregular, the influence on a flow field cannot be predicted, and the phenomenon of secondary scouring can occur after a period of time;

2. traditional submarine pipeline scour prevention measures adopt flexible protection means such as artifical grass, bionical marine alga mostly, but this type of means is in the face of high-speed rivers, very easily loses the effect, takes place to destroy, and then leads to submarine pipeline to elude the phenomenon emergence.

SUMMERY OF THE UTILITY MODEL

For solving the above problem, the utility model discloses a following technical scheme realizes: the protecting device for preventing the seabed pipeline from scouring and promoting the seabed pipeline to fall into the silt comprises a pile foundation and a sea pipe, wherein a flow guide transmission structure is arranged on the pile foundation; the water conservancy diversion transmission structure includes: a plurality of steel trusses, a plurality of rigid guide plates and a bottom plate; the bottom plate is installed on the pile foundation, the steel trusses are installed on the wall under the bottom plate, and the rigid guide plates are installed on the wall on the bottom plate.

Preferably, the transmission assembly comprises: the flow resisting device comprises a flow resisting fin, a dowel bar, a first arc-shaped block, a spring and a second arc-shaped block;

the flow resisting fin is installed on the upper wall face of the bottom plate, the dowel bar is installed on the lower wall face of the bottom plate, the first arc-shaped block is installed on the dowel bar, the spring is installed on the first arc-shaped block, and the second arc-shaped block is installed on the spring.

Preferably, the pile foundation is in a suction tube pile foundation type.

Preferably, the bottom plate is made of AH40 steel.

Preferably, the plurality of rigid baffles are welded over the bottom plate.

Preferably, the second arced block tortuosity is the same as the hypotube tortuosity.

Advantageous effects

The utility model provides a submarine pipeline scour prevention silt protector that falls short possesses following beneficial effect:

1. the device is provided with the plurality of rigid guide plates and the bottom plate, and the rigid guide plates flow to the seabed in all directions, so that the effect of reducing the flow velocity near the marine pipe can be achieved, a good protection effect can be achieved, the loss of silt near the marine pipe is reduced, the traditional seabed pipeline anti-scouring measure is solved, a riprap layer is usually covered around the pipeline, and the mat is arranged to promote the silt, the method is easy to construct and has a certain protection effect, but because the riprap is irregular, the influence on a flow field cannot be predicted, and the problem of secondary scouring can occur after a period of time;

2. through installing the choked flow fin on the device, dowel steel and second arc piece, produce decurrent effort to the device through the choked flow fin, and transmit to second arc piece through the dowel steel, help and accomplish from burying the process with higher speed the sea pipe, traditional submarine pipeline scour prevention measure has been solved, adopt artifical grass mostly, flexible protective means such as bionical marine alga, but this type of means is in the face of high-speed rivers, very easily lose the effect, take place to destroy, and then the problem that the phenomenon that leads to submarine pipeline to empty appears.

Drawings

Fig. 1 is the whole three-dimensional structure schematic diagram of the utility model discloses submarine pipeline scour prevention promotes silt protector that falls.

Fig. 2 is a schematic view of the structure of the utility model of the submarine pipeline erosion-proof silt-proof protector.

In the figure: 1. the device comprises a pile foundation, 2, a steel truss, 3, a rigid guide plate, 4, flow blocking fins, 5, a bottom plate, 6, a dowel bar, 7, a first arc-shaped block, 8, a spring, 9, a second arc-shaped block, 10 and a sea pipe.

Detailed Description

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the protecting device for preventing the seabed pipeline from scouring and promoting the seabed pipeline to fall into silt comprises a pile foundation 1 and a sea pipe 10, wherein a flow guide transmission structure is arranged on the pile foundation 1; the water conservancy diversion transmission structure includes: a plurality of steel trusses 2, a plurality of rigid guide plates 3 and a bottom plate 5; the bottom plate 5 is installed on the pile foundation 1, the steel trusses 2 are installed on the lower wall surface of the bottom plate 5, and the rigid guide plates 3 are installed on the upper wall surface of the bottom plate 5.

It should be noted that, when needs protected marine pipe 10, pile foundation 11 plays the basic effect of support of whole device, and a plurality of steel trusses 2 support bottom plate 5, and parallel and marine pipe 10 direction come to flow and destroy the rivers structure through a plurality of rigidity guide plates 3 on the bottom plate 5, reduce the velocity of flow, avoid near marine pipe 10 silt to be taken away by rivers.

In a specific implementation, the transmission assembly comprises: the flow resisting device comprises a flow resisting fin 4, a dowel bar 6, a first arc-shaped block 7, a spring 8 and a second arc-shaped block 9;

the choked flow fin 4 is installed wall department on the bottom plate 5, dowel bar 6 is installed wall under the bottom plate 5, first arc piece 7 is installed on dowel bar 6, spring 8 is installed on first arc piece 7, second arc piece 9 is installed on spring 8.

It should be noted that, when the marine pipe 10 needs to be buried, the incoming flow in the direction perpendicular to the marine pipe 10 generates a reaction force on the device under the action of the flow blocking fins 4, so as to generate a pressing action, and the downward force is transmitted to the first arc-shaped block 7 through the transmission rod 6 by matching with the self weight of the marine pipe 10, and finally is transmitted to the second arc-shaped block 9 through the spring 8, so as to act on the marine pipe 10, thereby helping the marine pipe 10 to speed up and bury itself, and the spring 8 plays a role in buffering.

In the specific implementation process, the pile foundation 1 is in a suction tube pile foundation type.

It should be noted that the pile foundation type of the suction tube can be well adapted to the soft foundation of the sea bottom.

In a specific implementation process, the bottom plate 5 is made of AH40 steel.

It should be noted that the bottom plate needs to be subjected to rust prevention treatment, so that the corrosion resistance of the bottom plate in seawater is enhanced to a certain extent.

In the specific implementation, further, the rigid baffles 3 are welded above the bottom plate 5.

It should be noted that welding increases the connectivity of several rigid baffles 3 to the floor 5.

In a specific implementation, further, the second curved piece 9 is curved the same as the sea pipe 10.

It should be noted that the same degree of curvature ensures that the second arc-shaped block 9 can be well attached to the surface of the sea pipe 10, ensuring the effect of the downward pressure.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The protecting device for preventing erosion and promoting silt of the submarine pipeline comprises a pile foundation and a sea pipe, wherein a flow guide transmission structure is arranged on the pile foundation; the water conservancy diversion transmission structure includes: a plurality of steel trusses, a plurality of rigid deflectors and a bottom plate; the novel steel truss foundation is characterized in that the base plate is installed on the pile foundation, the steel trusses are installed on the lower wall surface of the base plate, and the rigid guide plates are installed on the upper wall surface of the base plate.

2. The subsea pipeline erosion prevention and silt promotion protection device of claim 1, wherein the transmission structure comprises: the flow resisting device comprises a flow resisting fin, a dowel bar, a first arc-shaped block, a spring and a second arc-shaped block;

the flow resisting fin is installed on the upper wall face of the bottom plate, the dowel bar is installed on the lower wall face of the bottom plate, the first arc-shaped block is installed on the dowel bar, the spring is installed on the first arc-shaped block, and the second arc-shaped block is installed on the spring.

3. An erosion and silt promoting protection apparatus for a subsea pipeline according to claim 1, wherein said pile foundation is of the suction tube pile foundation type.

4. An erosion and silt promoting protection apparatus for a subsea pipeline according to claim 1, wherein said bottom plate is made of AH40 steel.

5. An erosion and silt promoting protection for a subsea pipeline according to claim 1, wherein said rigid baffles are welded above the floor.

6. An erosion and silt promoting prevention and protection device for a submarine pipeline according to claim 2, wherein the curvature of the second curved block is the same as the curvature of the submarine pipeline.

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