阅读说明：本技术 一种近海油气海底管线保护装置 (Offshore oil gas submarine pipeline protection device ) 是由 岳明 王伟军 艾万政 于 2020-07-28 设计创作，主要内容包括：一种近海油气海底管线保护装置,包括梯形长框,仿生水草,U型桩,滚动组件和阴极保护组件,所述梯形长框顶部通过第二横架与U型桩固定连接,梯形长框内设有枕板,枕板上安装有一组导轨,导轨上固定连接有弓形板,所述仿生水草安装在海床上,U型桩两侧均安装有第一横架,第一横架通过阻尼件与弓形板的两侧边固定连接。管道之间通过柔性管彼此固定连接,柔性管内设有一对滚动组件,滚动组件包括滚珠和套管,套管通过滚珠与管内腔和柔性管转动连接,所述阴极保护组件通过安装板固定在管道内。本发明适用于近海油气海底管线的保护,可以有效降低水流对管线的冲刷,减小涡流振荡,还能够抵抗化学腐蚀与管道内的热效应。(The utility model provides an coastal waters oil gas submarine pipeline protection device, includes trapezoidal long frame, bionical pasture and water, U type stake, roll subassembly and cathodic protection subassembly, trapezoidal long frame top is equipped with the pillow board through second crossbearer and U type stake fixed connection in the trapezoidal long frame, installs a set of guide rail on the pillow board, fixedly connected with bow plate on the guide rail, bionical pasture and water is installed on the seabed, and first crossbearer is all installed to U type stake both sides, and first crossbearer passes through the both sides limit fixed connection of damping piece and bow plate. The pipeline is fixedly connected with each other through a flexible pipe, a pair of rolling assemblies are arranged in the flexible pipe, each rolling assembly comprises a ball and a sleeve, the sleeves are rotatably connected with the inner cavity of the pipe and the flexible pipe through the balls, and the cathode protection assemblies are fixed in the pipeline through mounting plates. The invention is suitable for protecting offshore oil and gas submarine pipelines, can effectively reduce the scouring of water flow to the pipelines, reduce vortex oscillation, and resist chemical corrosion and heat effect in the pipelines.)

1. The utility model provides an offshore oil gas submarine pipeline protection device, includes trapezoidal long frame (7), bionical pasture and water (13), U type stake (18), rolling component (21) and cathodic protection subassembly (27), its characterized in that: the device comprises a seabed (1), a trapezoidal long frame (7), a U-shaped pile (18), a pillow plate (9), a group of guide rails (8), a cambered plate (5) and a pipeline (3), wherein the trapezoidal long frame (7) is arranged in a trapezoidal groove (2) of the seabed (1), the top of the trapezoidal long frame (7) is fixedly connected with the U-shaped pile (18) through a second cross frame (20), the pillow plate (9) is arranged in the trapezoidal long frame (7), the guide rails (8) are arranged on the pillow plate (9), the cambered plate (5) is fixedly connected with the;

the bionic aquatic weed (13) is arranged on the seabed (1) through a base pad (15), the base pad (15) is arranged at the bottom of the seabed (1), an anchor belt (16) is fixedly connected to the bottom end of the base pad (15), and an anchoring piece (17) is arranged on the anchor belt (16);

the pile foundation at the bottom of the U-shaped pile (18) obliquely penetrates through the trapezoidal long frame (7) and is inserted into the seabed (1), first cross frames (19) are arranged on two sides of the U-shaped pile (18), and the first cross frames (19) are fixedly connected with two side edges of the arched plate (5) through damping pieces (6);

the cathode protection subassembly (27) is fixed in pipeline (3) through mounting panel (32), is equipped with at least three metal filling layer (28) in mounting panel (32), is equipped with intermediate level (29) between metal filling layer (28), intermediate level (29) are including insulating tape (30) and conductive band (31), and insulating tape (30) parcel conductive band (31), pipeline (3) and conductive band (31) and outside peripheral hardware (33) electric connection.

2. The offshore oil and gas subsea pipeline protection device of claim 1, wherein: pipeline (3) are fixed connection each other through flexible pipe (301) between, be equipped with a pair of rolling subassembly (21) in flexible pipe (301), wherein, rolling subassembly (21) include ball (23) and sleeve pipe (25), are equipped with pipe inner chamber (22) that supply pipeline (3) to pass through in sleeve pipe (25), and nested limit ring (24) in sleeve pipe (25), installation in limit ring (24) ball (23), sleeve pipe (25) are connected through ball (23) and pipe inner chamber (22) and flexible pipe (301) rotation.

3. The offshore oil and gas subsea pipeline protection device of claim 1, wherein: and fillers (10) are arranged among the pillow plate (9), the guide rail (8) and the arched plate (5), and the pillow plate (9) and the trapezoidal long frame (7) are provided with a broken stone filling layer (11).

4. The offshore oil and gas subsea pipeline protection device of claim 1, wherein: the gathering part of the bionic aquatic weed (13) and the seabed (1) is also provided with a safety net (14).

5. The offshore oil and gas subsea pipeline protection device of claim 1, wherein: the upper half part of the outer side of the pipeline (3) is provided with a steel concrete layer (4), and the outer side of the steel concrete layer (4) is provided with a plurality of spoilers (12) which are arranged along the axial direction of the pipeline.

6. The offshore oil and gas subsea pipeline protection device of claim 1, wherein: the anchoring piece (17) is fixedly connected with the trapezoidal long frame (7) and the anchoring belt (16) and the U-shaped pile (18).

7. The offshore oil and gas subsea pipeline protection device according to claim 2, wherein: and a pair of clamping rings (26) is arranged on the outer side of the sleeve (25).

8. The offshore oil and gas subsea pipeline protection device of claim 1, wherein: the metal filling layer (28) is adhered to the middle layer (29) through paint, and the metal filling layer (28) on the uppermost layer is also adhered to the mounting plate (32).

Technical Field

The invention relates to the technical field of submarine pipeline protection, in particular to an offshore oil and gas submarine pipeline protection device.

Background

The effect and influence of the ocean current on the pipeline are particularly important, in the scouring effect of the ocean current on the pipeline foundation, the bottom velocity is an important hydrodynamic factor, the resistance to the bottom velocity scouring is a key design factor for protecting the foundation soil of the pipeline, and the foundation soil is scoured, so that the whole pipeline system is in the risk of instability; the submarine pipelines mostly adopt steel pipes, are in seawater or submarine sediments, and are very strong corrosive environments. When a pipeline passes through an uneven seabed, suspension and bending stress are caused in the pipeline, resonance instability can be generated due to vortex vibration when the pipeline is suspended, the pipeline is damaged due to excessive stress concentration, and thermal gradient can be generated in the pipeline when the pipeline conveys high-temperature fluid, so that expansion and contraction of the pipeline are caused, buckling, moving and loading of the whole pipeline are caused, fatigue damage can be generated at the position where the pipeline is relatively weak, even the pipeline leaks, and irreparable loss is caused.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides an offshore oil and gas submarine pipeline protection device which can effectively reduce the scouring of water flow to pipelines, reduce vortex oscillation and resist chemical corrosion and the heat effect in pipelines.

The utility model provides an coastal waters oil gas submarine pipeline protection device, includes trapezoidal long frame, bionical pasture and water, U type stake, roll subassembly and cathodic protection subassembly, and trapezoidal long frame sets up in the trapezoidal ditch inslot of seabed, and trapezoidal long frame top is equipped with the pillow board through second crossbearer and U type stake fixed connection in the trapezoidal long frame, installs a set of guide rail on the pillow board, fixedly connected with bow-shaped plate on the guide rail, installs the pipeline on the bow-shaped plate.

The bionic aquatic weed is installed on a seabed through a base pad, the base pad is arranged at the bottom of the seabed, an anchor belt is fixedly connected to the bottom end of the base pad, and an anchoring piece is installed on the anchor belt.

In U type pile bottom pile foundation slope runs through trapezoidal long frame and inserts the seabed, first crossbearer is all installed to U type pile both sides, and first crossbearer passes through damping piece and the both sides limit fixed connection of bow-shaped board.

The cathode protection assembly is fixed in the pipeline through the mounting plate, at least three metal filling layers are arranged in the mounting plate, an intermediate layer is arranged between the metal filling layers and comprises an insulating tape and a conductive tape, the insulating tape wraps the conductive tape, and the pipeline and the conductive tape are electrically connected with external peripheral equipment.

As a further scheme of the invention: the pipeline is fixedly connected with each other through a flexible pipe, a pair of rolling assemblies are arranged in the flexible pipe, each rolling assembly comprises a ball and a sleeve, a pipe inner cavity for the pipeline to pass through is formed in each sleeve, a limiting ring is embedded in each sleeve, the balls are installed in the limiting rings, and the sleeves are rotatably connected with the pipe inner cavities and the flexible pipes through the balls.

As a further scheme of the invention: and fillers are arranged among the pillow plate, the guide rail and the arched plate, and the pillow plate and the trapezoidal long frame are provided with gravel filling layers.

As a further scheme of the invention: and a safety net is also arranged at the gathering position of the bionic aquatic weeds and the seabed.

As a further scheme of the invention: the upper half part of the outer side of the pipeline is provided with a steel concrete layer, and the outer side of the steel concrete layer is provided with a plurality of spoilers arranged along the axial direction of the pipeline.

As a further scheme of the invention: the anchoring piece is fixedly connected with the trapezoidal long frame and the anchoring belt and the U-shaped pile.

Preferably, the outer side of the sleeve is also provided with a pair of clamping rings.

As a further scheme of the invention: the metal filling layer is adhered to the middle layer through paint, and the metal filling layer on the uppermost layer is also adhered to the mounting plate.

Compared with the prior art, the bionic aquatic weed is arranged to prevent the scouring action of water flow on the seabed, the damping piece absorbs the energy of vibration and bending, the spoiler reduces the vibration caused by vortex flow and prevents the pipeline from generating sharp buckling, the rolling assembly correspondingly rotates aiming at the heat effect in the pipeline to reduce the influence caused by the heat effect, and the cathode protection assembly is used for protecting the pipeline against the marine corrosion environment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of a U-shaped pile according to the present invention;

FIG. 3 is a schematic view of a spoiler structure according to the present invention

FIG. 4 is a schematic view of the rolling assembly of the present invention;

FIG. 5 is a cross-sectional view taken along line A-A of the present invention.

The labels in the figure are: 1-sea bed; 2-trapezoidal grooves; 3-a pipeline; 301-a flexible tube; 4-steel concrete layer; 5-a bow plate; 6-a damping member; 7-a trapezoidal long frame; 8-a guide rail; 9-pillow board; 10-a filler; 11-a gravel packing layer; 12-a spoiler; 13-bionic aquatic weed; 14-a safety net; 15-a base pad; 16-an anchor band; 17-an anchor; 18-U-shaped piles; 19-a first cross-frame; 20-a second cross frame; 21-a rolling component; 22-tube lumen; 23-a ball bearing; 24-a stop collar; 25-a cannula; 26-a clamping ring; 27-a cathodic protection component; 28-at least three metal fill layers; 29-an intermediate layer; 30-an insulating tape; a 31-conductive band; 32-a mounting plate; 33-peripheral.

Detailed Description

Referring to fig. 1-5, this embodiment provides an offshore oil gas submarine pipeline protection device, including trapezoidal long frame 7, bionical pasture and water 13, U type stake 18, roll subassembly 21 and cathodic protection subassembly 27, trapezoidal long frame 7 sets up in trapezoidal slot 2 of seabed 1, trapezoidal long frame 7 top is through second crossbearer 20 and U type stake 18 fixed connection, be equipped with pillow board 9 in the trapezoidal long frame 7, install a set of guide rail 8 on the pillow board 9, be equipped with filler 10 between guide rail 8 and the segmental plate 5, pillow board 9 and trapezoidal long frame 7 are equipped with rubble filling layer 11, fixedly connected with segmental plate 5 on the guide rail 8, install pipeline 3 on the segmental plate 5, the first part in the pipeline 3 outside is equipped with steel concrete layer 4, the spoiler 12 that sets up along the pipeline axial is equipped with in the steel concrete layer 4 outside.

The bionic aquatic weed 13 is installed on the seabed 1 through the base pad 15, the base pad 15 is arranged at the bottom of the seabed 1, the bottom end of the base pad 15 is fixedly connected with the anchor belt 16, the anchor belt 16 is provided with the anchoring part 17, the gathering part of the bionic aquatic weed 13 and the seabed 1 is also provided with the safety net 14, and the anchoring part 17 is fixedly connected with the trapezoidal long frame 7 and the anchor belt 16 and the U-shaped piles 18.

The pile foundation slope of U type pile 18 bottom runs through trapezoidal long frame 7 and inserts in seabed 1, and first crossbearer 19 is all installed to U type pile 18 both sides, and first crossbearer 19 passes through damping piece 6 and the both sides limit fixed connection of bow-shaped plate 5.

Cathodic protection subassembly 27 passes through the mounting panel 32 to be fixed in pipeline 3, is equipped with at least three metal filling layer 28 in the mounting panel 32, is equipped with intermediate level 29 between the metal filling layer 28, intermediate level 29 includes insulating tape 30 and conductive band 31, and insulating tape 30 wraps up conductive band 31, pipeline 3 and conductive band 31 and outside peripheral hardware 33 electric connection, through coating adhesion between metal filling layer 28 and the intermediate level 29, and the metal filling layer 28 of the superiors still with the mounting panel 32 adhesion.

The pipelines 3 are fixedly connected with each other through a flexible pipe 301, a pair of rolling assemblies 21 are arranged in the flexible pipe 301, each rolling assembly 21 comprises a ball 23 and a sleeve 25, a pipe inner cavity 22 for the pipelines 3 to pass through is arranged in each sleeve 25, a limiting ring 24 is embedded in each sleeve 25, the balls 23 are arranged in each limiting ring 24, each sleeve 25 is rotatably connected with the pipe inner cavity 22 and the flexible pipe 301 through the balls 23, and a pair of clamping rings 26 are further arranged on the outer side of each sleeve 25.

The steel concrete layer 4 and the U-shaped piles 18 are used for ensuring the stability of the whole pipeline structure; the plurality of spoilers 12 are arranged on the outer side of the steel concrete layer 4 along the axial direction of the pipeline, so that the movement of water flow is slowed down, the seabed 1 can gradually cover the pipeline 3, and the self-burying of the pipeline 3 is promoted; the damping piece 6 is connected with the arched plate 5 of the bearing pipeline 3 and the U-shaped pile 18, so that bending and vibration energy caused by external environment change can be absorbed; trapezoidal rectangular frame 7 is the main part of pipeline installation, for the frame-type, set up the matching along the length direction of trapezoidal slot 2, pipeline 3 that pillow 9 and guide rail 8 are used for supporting, pillow 9 can be settled in trapezoidal rectangular frame 7, also can extend trapezoidal rectangular frame 7 and combine with outside seabed 1, filler 10 between pipeline 3 and the bow-shaped plate 5 need have sufficient rigidity and toughness in order to satisfy its bearing capacity and flexbility, the even level and smooth setting of rubble filling layer 11 of bottom in trapezoidal rectangular frame 7, trapezoidal rectangular frame 7 and pillow 9 wrap up the rubble in the rubble filling layer 11, make the rubble not spill in trapezoidal rectangular frame 7.

The bionic aquatic weed 13 arranged on the seabed 1 floats on the seabed 1 due to buoyancy, seawater is subjected to flexible viscous damping action of the bionic aquatic weed 13, the flow rate of the seawater is reduced, and due to obstruction of the bionic aquatic weed 13, silt on the seabed 1 is continuously deposited on the base pad 15 and the safety net 14, after a period of deposition, a dune can be formed, so that the bottom flow rate is effectively reduced, scouring of water flow is reduced, a foundation part of a submarine pipeline is protected, the base pad 15 and the safety net 14 are used for fixing the bionic aquatic weed 13, and an anchor belt 16 fixed at the bottom end of the base pad 15 is fixed with the trapezoidal long frame 7 and the U-shaped pile 18 through the anchoring piece 17.

The mounting plate 32 is used for supporting the metal filling layer 28 and the intermediate layer 29 in the cathode protection assembly 27, the metal filling layer 28 needs to have good compression resistance, tensile resistance and bending resistance, the upper part and the lower part of the conductive belt 31 are wrapped by the insulating belts 30, the conductive belt 31 is electrically connected with an external device 33, the external device 33 continuously supplies power to the pipeline 3 during specific work, and the potential of each position on the surface of the pipeline 3 is different due to different positions of the pipeline 3, different water content, salt content and oxygen content concentration of soil; the outer part 33 serves as an anode having the highest potential, and transmits electrons through the conductive tape 31, and the tube 3 absorbs the electrons to serve as a cathode, thereby protecting the tube 3.

The pipelines 3 are fixedly connected with each other through the flexible pipe 301, a pair of rolling assemblies 21 are arranged in the flexible pipe 301, when high-temperature fluid is conveyed, a thermal gradient is generated in the pipelines 3, the oil and gas pipelines usually change at high temperature, when the pipelines 3 expand or contract, the flexible pipe 301 generates stress to act on the rolling assemblies 21 to extrude the rolling assemblies 21, the sleeve 25 in the rolling assemblies 21 rotates in the flexible pipe 301 through the balls 23 to compensate to a certain degree, the buckling and loading of the pipelines 3 are overcome, stress concentration is avoided, and when the temperature of the inner cavity 22 of the pipe is recovered to be normal along with the balance of the external environment, the rolling assemblies 21 compensate in the same mode. The retainer ring 24 is used to clamp the balls 23, the outer surface of the balls 23 contacts the tube lumen 22 and the flexible tube 301, and the clamp ring 26 is used to clamp the entire sleeve 25.

It should be noted that the description of the present invention and the accompanying drawings illustrate preferred embodiments of the present invention, but the present invention may be embodied in many different forms and is not limited to the embodiments described in the present specification, which should not be construed as an additional limitation of the present invention, and the embodiments are provided for thorough understanding of the present disclosure. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.