阅读说明：本技术 一种海水提升管及其制造方法 (Seawater lifting pipe and manufacturing method thereof ) 是由 李宁 徐占勇 聂家平 宋金扬 孙建志 叶飞 于 2021-09-29 设计创作，主要内容包括：本发明涉及海洋工程施工技术领域,公开一种海水提升管及其制造方法。所述海水提升管包括管体以及设置于管体上的支撑环、加强筋、防磨环、导向筋和加强环,支撑环、加强筋、防磨环和导向筋分别设置于管体的内侧壁上,支撑环与加强筋连接,加强筋沿支撑环的周向设置有多个,加强环设置于管体的外侧壁上。本发明结构简单,易于加工制造,能够在船体分段阶段即可对防磨环进行镗孔加工,无需在船坞阶段镗孔,大大缩短了船坞阶段的加工周期,且将风险点前移,如果镗孔有问题,具备足够时间补救,避免了延期交船。(The invention relates to the technical field of ocean engineering construction, and discloses a seawater lifting pipe and a manufacturing method thereof. The seawater lifting pipe comprises a pipe body, a support ring, a reinforcing rib, an anti-abrasion ring, a guide rib and a reinforcing ring, wherein the support ring, the reinforcing rib, the anti-abrasion ring and the guide rib are arranged on the inner side wall of the pipe body respectively, the support ring is connected with the reinforcing rib, the reinforcing rib is arranged in a plurality of positions along the circumferential direction of the support ring, and the reinforcing ring is arranged on the outer side wall of the pipe body. The invention has simple structure and easy processing and manufacturing, can bore the anti-abrasion ring at the stage of ship body segmentation, does not need to bore at the stage of dock, greatly shortens the processing period at the stage of dock, moves the risk point forward, has enough time to remedy if the bore has problems, and avoids the delayed ship delivery.)

1. The utility model provides a seawater riser, its characterized in that, including body (1) and set up in support ring (2), strengthening rib (3), abrasionproof ring (4), direction muscle (5) and beaded finish (6) on body (1), support ring (2) strengthening rib (3) abrasionproof ring (4) with direction muscle (5) set up respectively in on the inside wall of body (1), support ring (2) with strengthening rib (3) are connected, strengthening rib (3) are followed the circumference of support ring (2) is provided with a plurality ofly, beaded finish (6) set up in on the lateral wall of body (1).

2. The seawater riser as recited in claim 1, wherein the wear ring (4) is formed by overlaying welding wires of inconel.

3. The seawater riser as claimed in claim 1, wherein the wear ring (4) has a surface roughness of ra 3.2.

4. The seawater riser as recited in claim 1, wherein the inner diameter of the wear ring (4) has a value in the range of 1800mm to 1900 mm.

5. The seawater riser as claimed in claim 1, wherein the thickness of the anti-wear ring (4) ranges from 9mm to 11 mm.

6. The seawater riser as claimed in claim 1, wherein the width of the wear ring (4) ranges from 140mm to 160 mm.

7. The seawater riser as claimed in claim 1, wherein the reinforcing rib (3) and the guide rib (5) are respectively arranged parallel to the axial direction of the pipe body (1).

8. The seawater riser as claimed in any one of claims 1 to 7, wherein a fastening structure (7) is provided on an outer sidewall of the pipe body (1), and the fastening structure (7) is used for connecting with a ship hull structure.

9. The seawater riser as claimed in claim 8, wherein the fastening structure (7) comprises a first fastener (71) and a second fastener (72), the pipe body (1) is clamped between the first fastener (71) and the second fastener (72), and the first fastener (71) and/or the second fastener (72) is/are used for connecting with a ship hull structure.

10. A method for manufacturing a seawater riser pipe, which is used for manufacturing the seawater riser pipe according to any one of claims 1 to 9, comprising the steps of:

s1, welding the reinforcing ribs (3), the guide ribs (5) and the support ring (2) on the pipe body (1) in the stage of ship body segmentation;

s2, mounting the pipe body (1) on a ship structure;

s3, welding the reinforcing ring (6) on the pipe body (1);

s4, welding the anti-abrasion ring (4) on the pipe body (1), wherein the anti-abrasion ring (4) is formed by overlaying welding wires of chromium-nickel-iron alloy, symmetrical welding is adopted during welding, current parameters are controlled during welding to reduce a welding heat input value, welding and monitoring are carried out simultaneously, and when an out-of-tolerance trend is found, the welding position and mode are adjusted;

s5, grooving the reinforcing ribs (3), and surfacing and filling by adopting a bidirectional stainless steel welding material to form a surfacing area and polishing;

s6, erecting a boring device, installing a boring cutter on a boring arm, and boring the anti-abrasion ring (4) to enable the surface roughness of the anti-abrasion ring (4) to reach Ra3.2.

Technical Field

The invention relates to the technical field of ocean engineering construction, in particular to a seawater lifting pipe and a manufacturing method thereof.

Background

With the development of industrial economy, deep sea oil fields are gradually developed, the number of deep sea drilling and oil Production platforms is increasing, Floating Production Storage and offloading (FPSO for short) is used as a more advanced deep sea oil Production platform, and the requirements for construction or modification are increasing. Seawater lift pumps are essential components of an FPSO, working below sea level and lifting seawater through seawater risers onto the FPSO platform, which provides cooling water and process water for other equipment on the FPSO. Because the seawater lift pump works in seawater all the year round, in order to ensure the stable working performance of the seawater lift pump, a section of seawater lift pipe is usually built and the seawater lift pump is fixed at the bottom of a pipe cavity of the seawater lift pipe to work, so that the vibration of the seawater lift pump during operation can be effectively reduced, the winding of marine organisms can be avoided, and meanwhile, primary seawater purification equipment can be installed in the pipe cavity at the upper part of the seawater lift pipe to primarily purify the seawater lifted by the seawater lift pump.

At present, the FPSO seawater riser needs to be bored in a dock stage, and due to the fact that the anti-abrasion ring of the FPSO seawater riser is extremely high in material hardness and extremely high in boring difficulty, a large amount of dock working hours are wasted, the dock stage is long in period, the dock stage is close to ship delivery, and if boring is careless, the ship delivery delay can be caused.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a seawater riser which is easy to manufacture and does not require boring in a dock stage, thereby greatly shortening the processing cycle of the dock stage.

In view of the above problems, another object of the present invention is to provide a method for manufacturing a seawater riser, which is easy to manufacture and does not require boring in the dock stage, thereby greatly shortening the dock stage manufacturing cycle.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a seawater riser, includes the body and set up in support ring, strengthening rib, abrasionproof ring, direction muscle and beaded finish on the body, the support ring the strengthening rib the abrasionproof ring with the direction muscle set up respectively in on the inside wall of body, the support ring with the strengthening rib is connected, the strengthening rib is followed the circumference of support ring is provided with a plurality ofly, the beaded finish is set up in on the lateral wall of body.

As the preferable scheme of the seawater riser, the anti-abrasion ring is formed by overlaying welding wires of chromium-nickel-iron alloy.

As a preferable scheme of the seawater riser pipe, the surface roughness of the anti-abrasion ring is ra 3.2.

As the preferable scheme of the seawater riser pipe, the inner diameter of the anti-abrasion ring ranges from 1800mm to 1900 mm.

As the preferable scheme of the seawater riser pipe, the thickness range of the anti-abrasion ring is 9mm to 11 mm.

As a preferable scheme of the seawater riser pipe of the present invention, the width of the anti-abrasion ring ranges from 140mm to 160 mm.

As a preferable scheme of the seawater riser pipe of the present invention, the reinforcing rib and the guide rib are respectively arranged in parallel to an axial direction of the pipe body.

As a preferable scheme of the seawater riser pipe of the present invention, a fastening structure is disposed on an outer sidewall of the pipe body, and the fastening structure is used for connecting with a hull structure.

As a preferable aspect of the seawater riser pipe of the present invention, the fastening structure includes a first fastening member and a second fastening member, the pipe body is interposed between the first fastening member and the second fastening member, and the first fastening member and/or the second fastening member is used for connecting with a hull structure.

A method for manufacturing a seawater riser pipe, which is used for manufacturing the seawater riser pipe, and comprises the following steps:

s1, welding the reinforcing ribs, the guide ribs and the support rings on the pipe body in the stage of ship body segmentation;

s2, mounting the pipe body on a ship structure;

s3, welding the reinforcing ring on the pipe body;

s4, welding the anti-abrasion ring on the pipe body, wherein the anti-abrasion ring is formed by overlaying welding wires of chromium-nickel-iron alloy, symmetrical welding is adopted during welding, current parameters are controlled during welding so as to reduce welding heat input values, welding and monitoring are carried out simultaneously, and when an out-of-tolerance trend is found, the welding position and mode are adjusted;

s5, grooving the reinforcing ribs made of the EH36 steel plates, and surfacing and filling by adopting a bidirectional stainless steel welding material to form a surfacing area and polish;

s6, erecting a boring device, installing a boring cutter on a boring arm, and boring the anti-abrasion ring, so that the surface roughness of the anti-abrasion ring reaches Ra3.2.

The invention has the beneficial effects that:

the seawater lifting pipe provided by the invention has the advantages that the wear-resisting degree of the seawater lifting pipe is improved by arranging the wear-resisting ring on the inner side wall of the pipe body, the assembly efficiency of the seawater lifting pipe is improved by arranging the guide ribs on the inner side wall of the pipe body, the support ring and the reinforcing ribs are arranged on the inner side wall of the pipe body and connected with each other, a plurality of reinforcing ribs are arranged along the circumferential direction of the support ring, the structural strength and the waterproof grade of the seawater lifting pipe are improved by arranging the reinforcing rings on the outer side wall of the pipe body, the requirements of increasingly high deep sea operation are met, meanwhile, the seawater lifting pipe is simple in structure and easy to machine and manufacture, the wear-resisting ring can be bored in the ship body segmentation stage, boring in the dock stage is not needed, the machining period in the dock stage is greatly shortened, the risk point is moved forward, and if boring has problems, enough time is provided for remedy, avoiding the delay of delivery.

The invention provides a method for manufacturing a seawater lifting pipe, which comprises the steps of firstly welding a reinforcing rib, a guide rib and a support ring on a pipe body at a ship body segmentation stage, secondly mounting the pipe body on a ship body structure, thirdly welding a reinforcing ring on the pipe body, thirdly welding an anti-abrasion ring on the pipe body, surfacing welding the anti-abrasion ring by adopting a welding wire of a chromium-nickel-iron alloy, adopting symmetrical welding during welding, controlling current parameters during welding to reduce a welding heat input value, monitoring while welding, adjusting a welding position and a welding mode when an out-of-tolerance trend is found, then slotting on the reinforcing rib made of an EH36 steel plate, surfacing filling by adopting a bidirectional stainless steel welding material to form a surfacing area and polish smoothly, finally erecting boring and arranging equipment, mounting a boring cutter on a boring arm, and carrying out anti-abrasion on the anti-abrasion ring to ensure that the surface roughness of the anti-abrasion ring reaches Ra3.2, and the whole manufacturing method is simple and efficient, the degree of difficulty is low, can carry out bore hole processing to the abrasionproof ring at the hull segmentation stage, has shortened the processing cycle in dock stage greatly, and moves the risk point forward, if the bore hole has the problem, has enough time to remedy, has avoided the delay to hand over the ship.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic top view of a seawater riser provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a seawater riser provided in an embodiment of the present invention;

FIG. 3 is an axial view of a seawater riser provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a support ring and reinforcing ribs in a seawater riser pipe according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fastening structure in a seawater riser pipe according to an embodiment of the present invention.

In the figure:

1-a pipe body; 2-a support ring; 3-reinforcing ribs; 4-an anti-abrasion ring; 5-a guide rib; 6-a reinforcement ring; 7-a fastening structure; 71-a first fastener; 72-second fastener.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, the present embodiment provides a seawater riser tube, which includes a tube body 1, and a support ring 2, a reinforcing rib 3, an anti-wear ring 4, a guiding rib 5 and a reinforcing ring 6 which are disposed on the tube body 1, wherein the support ring 2, the reinforcing rib 3, the anti-wear ring 4 and the guiding rib 5 are respectively disposed on the inner side wall of the tube body 1, the support ring 2 is connected with the reinforcing rib 3, the reinforcing rib 3 is disposed in a plurality along the circumferential direction of the support ring 2, and the reinforcing ring 6 is disposed on the outer side wall of the tube body 1.

Through set up abrasionproof ring 4 on the inside wall at body 1, improved this sea water riser's wear resistance, through set up direction muscle 5 on the inside wall at body 1, improved this sea water riser's assembly efficiency. Through set up support ring 2 and strengthening rib 3 on the inside wall at body 1, support ring 2 is connected with strengthening rib 3, and strengthening rib 3 is provided with a plurality ofly along support ring 2's circumference, through set up strengthening ring 6 on body 1's lateral wall, has improved the structural strength and the waterproof grade of this sea water riser to satisfy increasingly high deep sea operation requirement. Meanwhile, the seawater lifting pipe is simple in structure and easy to machine and manufacture, the anti-abrasion ring 4 can be subjected to boring machining in the ship body segmentation stage, boring in the dock stage is not needed, the machining period in the dock stage is greatly shortened, the risk point is moved forward, if the boring is problematic, enough time is provided for remediation, and delayed ship delivery is avoided.

Optionally, the wear-resistant ring 4 is formed by overlaying welding wires of inconel. Inconel is a high strength material with very high corrosion and oxidation resistance. The welding wire is used as a filler metal or simultaneously as a metal wire welding material for electric conduction. In gas welding and gas tungsten arc welding, a welding wire is used as a filler metal; in submerged arc welding, electroslag welding and other gas metal arc welding, the wire is both a filler metal and a conductive electrode. The surface of the welding wire does not need to be coated with a flux for preventing oxidation.

Optionally, the surface roughness of the wear ring 4 is ra 3.2. The surface roughness refers to the unevenness of the small pitch and the minute valley of the processed surface, and the distance between two peaks or two valleys (wave distance) is small (below 1 mm), which is a microscopic geometrical error. The smaller the surface roughness, the smoother the surface. The surface roughness of Ra3.2 is selected, so that the service life of the anti-abrasion ring 4 can be effectively prolonged.

In this embodiment, the inner diameter of the wear-proof ring 4 ranges from 1800mm to 1900mm, and preferably, the inner diameter of the wear-proof ring 4 is 1880 mm. The thickness of the wear-proof ring 4 ranges from 9mm to 11mm, and preferably, the thickness of the wear-proof ring 4 is 10 mm. The width of the wear-proof ring 4 ranges from 140mm to 160mm, and preferably, the width of the wear-proof ring 4 is 150 mm.

Alternatively, the reinforcing ribs 3 and the guide ribs 5 are respectively arranged parallel to the axial direction of the pipe body 1. The guide ribs 5 are parallel to the axial direction of the pipe body 1, so that the vertical installation of the seawater lifting pipe is conveniently guided, and the assembly efficiency of the seawater lifting pipe is improved. The strengthening rib 3 is on a parallel with the axial setting of body 1, and simultaneously, strengthening rib 3 is provided with a plurality ofly along the circumference of support ring 2, has improved the structural strength and the waterproof grade of this sea water riser to satisfy increasingly high deep sea operation requirement.

In order to enhance the structural strength of the seawater riser and prevent the structural deformation of the seawater riser caused by the transportation and hoisting of the subsection and the total section, optionally, a fastening structure 7 is arranged on the outer side wall of the pipe body 1, and the fastening structure 7 is used for being connected with a ship body structure. The fastening structure 7 is part of the hull structure and may not be subsequently removed.

As shown in fig. 5, in the present embodiment, the fastening structure 7 includes a first fastening member 71 and a second fastening member 72, the pipe body 1 is sandwiched between the first fastening member 71 and the second fastening member 72, and the first fastening member 71 and/or the second fastening member 72 are used for connecting with the ship hull structure. The first fastening member 71 and the second fastening member 72 form a complete circle to clamp the pipe body 1, and the first fastening member 71 and the second fastening member 72 may be in the form of a sheet to reduce the weight.

The seawater lift pipe provided by the embodiment improves the wear resistance of the seawater lift pipe by arranging the anti-wear ring 4 on the inner side wall of the pipe body 1, improves the assembly efficiency of the seawater lift pipe by arranging the guide ribs 5 on the inner side wall of the pipe body 1, improves the structural strength and the waterproof grade of the seawater lift pipe by arranging the support ring 2 and the reinforcing ribs 3 on the inner side wall of the pipe body 1, connects the support ring 2 with the reinforcing ribs 3, arranges a plurality of the reinforcing ribs 3 along the circumferential direction of the support ring 2, and meets the increasingly high deep sea operation requirement by arranging the reinforcing rings 6 on the outer side wall of the pipe body 1, meanwhile, the seawater lift pipe has a simple structure, is easy to process and manufacture, can bore the anti-wear ring 4 in a ship body segmentation stage, does not need to bore holes in a dock stage, greatly shortens the processing period in a dock stage, and moves the risk point forward, if the hole is bored, enough time is provided for remediation, and the ship is prevented from being delivered in a delayed way.

The embodiment also provides a method for manufacturing the seawater riser, which is used for manufacturing the seawater riser and comprises the following steps:

s1, welding the reinforcing ribs 3, the guide ribs 5 and the support ring 2 on the pipe body 1 in the stage of ship body segmentation;

s2, mounting the pipe body 1 on a ship structure;

s3, welding the reinforcing ring 6 on the pipe body 1;

s4, welding the anti-abrasion ring 4 on the pipe body 1, wherein the anti-abrasion ring 4 is formed by overlaying welding wires of chrome-nickel-iron alloy, symmetrical welding is adopted during welding, welding is simultaneously carried out at symmetrical positions by the same number of welders, current parameters are controlled during welding, so that the welding heat input value is reduced, welding and monitoring are carried out simultaneously, and when an out-of-tolerance trend is found, the welding position and mode are adjusted, and the deformation possibility is reduced;

s5, grooving the reinforcing rib 3 made of the EH36 steel plate, and surfacing and filling by adopting a bidirectional stainless steel welding material to form a surfacing area and polish;

s6, erecting a boring device, boring by adopting a special boring arm, installing a boring cutter on the boring arm, and boring the anti-abrasion ring 4, so that the surface roughness of the anti-abrasion ring 4 reaches Ra3.2.

The method for manufacturing the seawater lift pipe provided by the embodiment comprises the steps of firstly, welding the reinforcing ribs 3, the guide ribs 5 and the support ring 2 on the pipe body 1 in a ship body segmentation stage, secondly, installing the pipe body 1 on a ship body structure, thirdly, welding the reinforcing ring 6 on the pipe body 1, thirdly, welding the anti-abrasion ring 4 on the pipe body 1, surfacing the anti-abrasion ring 4 by adopting a welding wire of a chromium-nickel-iron alloy, adopting symmetrical welding during welding, controlling current parameters during welding to reduce a welding heat input value, monitoring while welding, adjusting a welding position and a welding mode when an out-of-tolerance trend is found, then, slotting the reinforcing ribs 3 made of an EH36 steel plate material, surfacing and leveling by adopting a bidirectional stainless steel welding material to form a surfacing area and polish smoothly, finally, erecting boring equipment, installing a boring cutter on a boring arm, boring the anti-abrasion ring 4, and enabling the surface roughness of the anti-abrasion ring 4 to reach Ra3.2, the whole manufacturing method is simple and efficient, has low difficulty, can bore the wear-resistant ring 4 in the stage of ship body segmentation, greatly shortens the processing period of the dock stage, and moves the risk point forward, if the bore hole has a problem, the problem is remedied with enough time, and the delayed ship delivery is avoided.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.