CN111371060A - Marine flexible pipe cable sheath - Google Patents
Marine flexible pipe cable sheath Download PDFInfo
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- CN111371060A CN111371060A CN202010218888.1A CN202010218888A CN111371060A CN 111371060 A CN111371060 A CN 111371060A CN 202010218888 A CN202010218888 A CN 202010218888A CN 111371060 A CN111371060 A CN 111371060A
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- buoyancy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/12—Installations of electric cables or lines in or on the ground or water supported on or from floats, e.g. in water
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The application discloses flexible pipe cable sheath in ocean establishes a plurality of axle sleeve units and the cover that are fixed in the pipe cable periphery including the cover and locates a plurality of buoyancy units in the pipe cable periphery, and axle sleeve unit and buoyancy unit distribute along the axial of pipe cable in turn, and when the pipe cable is crooked to predetermineeing the camber, adjacent axle sleeve unit offsets with the buoyancy unit, in order to avoid the pipe cable to cross curved. The utility model provides a flexible pipe cable sheath in ocean can realize the crooked spacing and vertical direction's of pipe cable self-righting to and the shape of the flexible pipe cable in aqueous of suspension developments ocean.
Description
Technical Field
The application relates to the technical field of marine flexible pipe cable protective equipment, in particular to a marine flexible pipe cable sheath.
Background
With the development of high-end marine industries such as marine oil and gas, offshore wind power and the like, marine flexible pipe cables (such as marine cables, umbilical cables, flexible pipes, composite pipes, rubber pipes and the like) are used increasingly frequently. Marine flexible umbilicals need to be protected from overbending in order to avoid damage caused by excessive bending during installation or during operation. The conventional over-bending protection devices include a bending limiter, a bending reinforcer and the like, but have disadvantages.
The bending limiter can realize bending limit only through mechanical self-locking of the nested structure after the pipe cable is bent to a preset curvature, and when the pipe cable is not bent to the preset curvature, the bending limiter cannot form mechanical self-locking, cannot perform continuous bending protection on the pipe cable, and is easy to fatigue, so that the bending limiter is generally only used for a static pipe cable but not used for a dynamic pipe cable.
The bend stiffener is made of conical elastomeric material to provide continuous bend protection to the cable. However, because the marine pipe cable has no rigid limiting function, the marine pipe cable cannot be effectively protected under the limit working condition outside the design range.
In summary, how to limit the pipe cable and optimize the fatigue stress of the pipe cable under the limit condition is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, an object of the present application is to provide an ocean flexible pipe cable sheath, which utilizes mechanical self-locking to limit a pipe cable under an extreme condition; meanwhile, the device has a continuous bending and righting effect in the vertical direction, so that the suspended dynamic pipe cable can be shaped in water, and the stress and fatigue resistance of the pipe cable are optimized.
In order to achieve the above purpose, the present application provides the following technical solutions:
the utility model provides a flexible pipe cable sheath in ocean, establishes a plurality of axle sleeve units and the cover that is fixed in the pipe cable periphery including the cover and locates a plurality of buoyancy units of pipe cable periphery, the axle sleeve unit with buoyancy unit follows the axial of pipe cable distributes in turn, works as when the pipe cable is crooked to predetermineeing the camber, adjacent the axle sleeve unit with buoyancy unit offsets, in order to avoid the pipe cable is crossed and is bent.
Optionally, the buoyancy unit comprises a bottom connection unit sleeved on the periphery of the pipe cable and used for being fixedly connected with a rigid structural member, and all the shaft sleeve units and all the buoyancy units are located on the same side of the bottom connection unit.
Optionally, the buoyancy unit comprises a body of solid buoyancy material comprising a polymer matrix and a hollow light pressure resistant filler.
Optionally, the surface of the body is provided with a protective layer.
Optionally, two ends of the shaft sleeve unit are respectively provided with a connecting flange, and a first inner annular surface of the buoyancy unit is provided with connecting grooves distributed at intervals along the axial direction; when the adjacent shaft sleeve unit is connected with the buoyancy unit, the connecting flange on the front side of the shaft sleeve unit is arranged in the connecting groove on the rear side of the previous buoyancy unit, the connecting flange on the rear side of the shaft sleeve unit is arranged in the connecting groove on the front side of the next buoyancy unit, and a gap is reserved between the connecting groove and the corresponding connecting flange.
Optionally, the cross-sectional area of the connecting flange gradually increases from the end surface of the connecting flange to the middle of the connecting flange, and the cross-section of the connecting flange is a cross-section perpendicular to the central axis of the bushing unit; the sectional area of the connecting groove is gradually increased from the end face of the connecting groove to the middle of the connecting groove, and the section of the connecting groove is a section perpendicular to the central axis of the buoyancy unit.
Optionally, each of the bushing units comprises at least two first arc-shaped pipe pieces, each of the first arc-shaped pipe pieces is provided with a first inner annular surface, a first outer annular surface and a first axial tangent plane connecting the first inner annular surface and the first outer annular surface; in the same shaft sleeve unit, the first arc-shaped pipe pieces are sequentially distributed along the circumferential direction of the shaft sleeve unit, and the first axial tangent planes of two adjacent first arc-shaped pipe pieces are attached and fixed through a first connecting piece.
Optionally, in the two first axial tangent planes attached to each other, one first axial tangent plane is provided with a first positioning protrusion, and the other first axial tangent plane is provided with a first positioning groove.
Through above-mentioned scheme, the marine flexible pipe cable sheath that this application provided's beneficial effect lies in:
the application provides a flexible pipe cable sheath in ocean includes axle sleeve unit and buoyancy unit, and the two sets up in the outside of pipe cable, and along the axial alternate distribution of pipe cable. First, when the umbilical is bent to a predetermined curvature, the adjacent boss units are abutted against the buoyancy unit, thereby limiting the bending angle of the umbilical. Secondly, the buoyancy unit is arranged, so that the pipe cable can be continuously and automatically righted in the vertical direction, and the fatigue stress of the pipe cable is optimized; third, because buoyancy unit can provide buoyancy to the umbilical, consequently, in practical application, can set up the flexible umbilical sheath in ocean at the different position intervals of same umbilical for one section umbilical that is provided with the flexible umbilical sheath in ocean floats upwards, and does not set up one section umbilical of the flexible umbilical sheath in ocean and sinks, thereby realizes the molding of developments ocean umbilical suspension section in aqueous.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a marine flexible pipe cable sheath in an over-bending protection state according to an embodiment of the present application; three vertical upward arrows at the left side of the pipe cable in the figure indicate the buoyancy direction, and an arrow at the upper end of the pipe cable in the figure indicates the stress direction of the pipe cable;
fig. 2 is a schematic structural diagram of a marine flexible pipe cable sheath in a state of modeling a dynamic pipe cable suspension section according to an embodiment of the present application;
FIG. 3 is a partial cross-sectional view of a marine flexible umbilical jacket according to an embodiment of the present application;
FIG. 4 is a schematic structural view of a first segment of a sleeve unit;
FIG. 5 is a front view of the first arcuate segment shown in FIG. 4;
FIG. 6 is a top view of the first arcuate segment shown in FIG. 4;
FIG. 7 is a side view of the first arcuate segment shown in FIG. 4;
FIG. 8 is a schematic view of a second arcuate segment of a buoyancy unit;
FIG. 9 is a front view of the second arcuate segment shown in FIG. 8;
FIG. 10 is a top view of the second arcuate segment shown in FIG. 8;
FIG. 11 is a side view of the second arcuate segment shown in FIG. 8;
FIG. 12 is a schematic view of a third arcuate segment of a bottom attachment unit;
FIG. 13 is a front view of the third arcuate segment shown in FIG. 12;
FIG. 14 is a top view of the third arcuate segment shown in FIG. 12;
fig. 15 is a side view of the third arcuate segment shown in fig. 12.
The reference numerals in FIGS. 1-15 are:
the shaft sleeve comprises a shaft sleeve unit 1, a connecting flange 11, a first outer annular surface 12, a first inner annular surface 13, a first axial tangent surface 14, a first positioning protrusion 15 and a first positioning groove 16; the buoyancy unit 2, the connecting groove 21, the second outer ring surface 22, the second inner ring surface 23, the second axial tangent plane 24, the second positioning bulge 25, the second positioning groove 26, the main body 27 and the protective layer 28; the bottom connecting unit 3, an upper flange 31, a flange plate 32, a flange bolt hole 33, a third outer ring surface 34, a third inner ring surface 35, a third axial tangent plane 36, a third positioning protrusion 37 and a third positioning groove 38; an umbilical 4; a rigid structural member 5.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 application.
Referring to fig. 1-3, a marine flexible umbilical jacket provided herein may include: the buoyancy unit comprises a shaft sleeve unit 1, a buoyancy unit 2 and a bottom connecting unit 3.
The shaft sleeve unit 1 is mainly used for positioning the marine flexible pipe cable sheath on the pipe cable 4 integrally and is interlocked and nested with the buoyancy unit 2 to realize bending limit. The shaft sleeve unit 1 has a rotational symmetrical structure, and a through hole matched with the outer diameter of the pipe cable 4 is formed in the center of the shaft sleeve unit for the pipe cable 4 to pass through. The shaft sleeve unit 1 has a plurality ofly, and each 1 covers of shaft sleeve unit establishes the periphery that is fixed in tube cable 4, and whole shaft sleeve unit 1 is along the axial interval distribution of tube cable 4.
In terms of material selection, in order to ensure the positioning firmness without damaging the umbilical 4, the shaft sleeve unit 1 may be made of an elastomer material, such as polyurethane, rubber, or engineering plastics.
In terms of mechanical structure, referring to fig. 4 to 7, the bushing unit 1 may adopt the following structure: each shaft sleeve unit 1 comprises at least two first arc-shaped pipe pieces, each first arc-shaped pipe piece is provided with a first inner annular surface 13, a first outer annular surface 12 and a first axial tangent surface 14 connecting the first inner annular surface 13 and the first outer annular surface 12; in the same shaft sleeve unit 1, each first arc-shaped pipe piece is distributed in sequence along the circumferential direction of the shaft sleeve unit 1, and the first axial tangent planes 14 of two adjacent first arc-shaped pipe pieces are attached and fixed through a first connecting piece. Specifically, taking an example that each shaft sleeve unit 1 specifically includes two first arc-shaped pipe pieces, at this time, the shaft sleeve unit 1 is divided into two symmetrical halves. The first connecting piece can be specifically a bolt, bolt holes corresponding to the positions of the two first arc-shaped pipe pieces are formed at the moment, and the two halves of the shaft sleeve unit 1 are locked through fasteners such as bolts, nuts and the like, so that the two halves of the shaft sleeve unit are firmly fixed on the pipe cable 4. Optionally, one of the two first axial cut surfaces 14 is provided with a first positioning protrusion 15, and the other one is provided with a first positioning groove 16. The first positioning protrusion 15 is matched with the first positioning groove 16, so that the effect of convenient assembly is achieved. In addition, the first seating projection 15 and the first seating groove 16 may be provided at the bolt hole.
The buoyancy unit 2 mainly functions to realize the centralization of the pipe cable 4 in the vertical direction through the net buoyancy thereof; or the net buoyancy of the flexible pipe cable is distributed along the length direction of the pipe cable 4, so that the shape of the suspended section of the dynamic marine flexible pipe cable 4 in water is realized. The buoyancy unit 2 has a generally rotational symmetric structure, and a through hole having an outer diameter larger than that of the umbilical 4 is formed at the center thereof for the umbilical 4 to pass through. The buoyancy units 2 are multiple, the periphery of the pipe cable 4 is sleeved with each buoyancy unit 2, and all the buoyancy units 2 are distributed at intervals along the axial direction of the pipe cable 4.
In terms of material selection, the main body 27 of the buoyancy unit 2 is made of a solid buoyancy material, and mainly comprises a polymer matrix (e.g., epoxy resin, phenolic resin, unsaturated resin, etc.) and one or more hollow light pressure-resistant fillers (e.g., hollow glass beads, hollow ceramic beads, hollow plastic beads, composite hollow spheres, etc.). The exterior of the body 27 of the buoyancy unit 2 is a wear, impact and aging resistant skin protection layer 28The sheath 28 may be made of fiberglass composites, elastomeric coatings, engineering plastics, and the like. The working water depth of the buoyancy unit 2 can be as deep as 11000 m, and the density is generally 300 to 700kg/m3。
In terms of mechanical structure, please refer to fig. 8 to 11, the buoyancy unit 2 may specifically adopt the following structure: each buoyancy unit 2 comprises at least two second arc-shaped pipe pieces, each second arc-shaped pipe piece is provided with a second inner annular surface 23, a second outer annular surface 22 and a second axial tangent plane 24 connecting the second inner annular surface 23 and the second outer annular surface 22; in same buoyancy unit 2, each second arc section of jurisdiction distributes in proper order along buoyancy unit 2's circumference, and the second axial tangent plane 24 laminating of two adjacent second arc section of jurisdiction is fixed through the second connecting piece. Specifically, taking the example that each buoyancy unit 2 specifically includes two second arc-shaped pipe pieces, at this time, the buoyancy unit 2 is divided into two symmetrical halves. The second connecting piece can specifically be the bolt, and the bolt hole that the position corresponds is seted up to two second arc section of jurisdiction this moment, through fastener such as bolt and nut locking buoyancy unit 2's two halves, and buoyancy unit 2 cover is in the outside of tube cable 4 and axle sleeve unit 1 to there is certain displacement degree of freedom. Optionally, one of the two second axial tangent planes 24 is provided with a second positioning protrusion 25, and the other one is provided with a second positioning groove 26. The second positioning protrusion 25 is matched with the second positioning groove 26 to facilitate assembly. In addition, the second positioning protrusion 25 and the second positioning groove 26 may be specifically provided at the bolt hole.
In actual use, the shaft sleeve units 1 and the buoyancy units 2 are alternately distributed along the axial direction of the umbilical 4, and when the umbilical 4 is bent to a preset curvature, the adjacent shaft sleeve units 1 are abutted against the buoyancy units 2, so that the umbilical 4 is prevented from being over-bent.
In order to realize the connection between the shaft sleeve unit 1 and the buoyancy unit 2, the shaft sleeve unit 1 and the buoyancy unit 2 may be provided with a connection structure, for example, two ends of the shaft sleeve unit 1 are respectively provided with a connection flange 11, the diameter of the connection flange 11 at the end of the shaft sleeve unit 1 is larger than the diameter of the middle part of the shaft sleeve unit 1, and the shaft sleeve unit 1 has a dumbbell-shaped configuration structure with two high ends and a low middle part. Correspondingly, the first inner annular surface 13 of the buoyancy unit 2 is provided with axially spaced connection grooves 21, the connection grooves 21 being similar in shape to the connection flanges 11 of the sleeve unit 1 but slightly larger in size.
With the above structure, when the adjacent shaft sleeve units 1 are connected with the buoyancy unit 2, the buoyancy unit 2 is sleeved outside the pipe cable 4 and the shaft sleeve unit 1, and forms interlocking nesting with the connecting flange 11 of the shaft sleeve unit 1 through the connecting groove 21 inside the buoyancy unit 2. More specifically, for a certain sleeve unit 1 at the middle position of the marine flexible pipe cable sheath, the connection flange 11 at the front side of the sleeve unit 1 is disposed in the connection groove 21 at the rear side of the previous buoyancy unit 2, and the connection flange 11 at the rear side of the sleeve unit 1 is disposed in the connection groove 21 at the front side of the next buoyancy unit 2. For the buoyancy unit 2 at the middle position of the marine flexible pipe cable sheath, the connecting groove 21 at the front side of the buoyancy unit 2 is sleeved on the connecting flange 11 at the rear side of the previous shaft sleeve unit 1, and the connecting groove 21 at the rear side of the buoyancy unit 2 is sleeved on the connecting flange 11 at the front side of the next shaft sleeve unit 1.
Meanwhile, the connection grooves 21 have a gap with the corresponding connection flanges 11. By designing the shape and size of the connecting groove 21, certain bending freedom and curvature limitation of the whole sheath device can be realized. In actual use, the shape and size of the coupling flange 11 and the shape and size of the coupling groove 21 need to be designed according to the curvature required for the umbilical 4. In one embodiment, the cross-sectional area of the connection flange 11 is gradually increased from the end surface of the connection flange 11 to the middle of the connection flange 11, where the cross-section of the connection flange 11 is a cross-section perpendicular to the central axis of the bushing unit 1; the sectional area of the connecting groove 21 gradually increases from the end surface of the connecting groove 21 toward the middle of the connecting groove 21, where the section of the connecting groove 21 is a section perpendicular to the central axis of the buoyancy unit 2. That is, the end face of the connecting flange 11 is designed with an angled bevel to determine the curvature of the umbilical 4 at the limit of bending of the marine flexible umbilical sheath.
When the sleeve units 1 and the buoyancy units 2 in the nested structure are adopted, although the adjacent sleeve units 1 and the buoyancy units 2 have overlapped areas, the sleeve units 1 and the buoyancy units 2 are still alternately distributed in the overall view of the marine flexible pipe cable sheath.
The bottom connecting unit 3 is mainly used for being connected with rigid structural members 5 such as a pipe cable terminal and the like, and smooth transition of a flexible section and a rigid section of the pipe cable 4 is guaranteed. The bottom connection unit 3 has a rotational symmetrical structure, and a through hole matching with the outer diameter of the umbilical 4 is formed at the center thereof for the umbilical 4 to pass through. The periphery of the tube cable 4 is located to the bottom linkage unit 3 cover to can with rigid structure 5 fixed connection, all axle sleeve units 1 and all buoyancy units 2 all lie in the same one side of bottom linkage unit 3, make the flexible tube cable sheath of ocean wholly be connected through rigid structure 5 such as bottom unit and tube cable terminal.
In terms of material selection, the bottom connecting unit 3 can be made of the same elastomer or engineering plastic material as the shaft sleeve unit 1; or the material is made of metal or alloy material with better seawater corrosion resistance according to the requirement (for example, to ensure the connection strength and rigidity).
In terms of mechanical structure, please refer to fig. 12 to fig. 15, the bottom connecting unit 3 may specifically adopt the following structure: the bottom connection unit 3 comprises at least two third arc-shaped tube pieces, wherein each third arc-shaped tube piece is provided with a third inner annular surface 35, a third outer annular surface 34 and a third axial tangent plane 36 connecting the third inner annular surface 35 and the third outer annular surface 34; each third arc section of jurisdiction distributes in proper order along bottom coupling unit 3's circumference, and the third axial tangent plane 36 laminating of two adjacent third arc sections of jurisdiction is fixed through the third connecting piece. Specifically, taking the example that the bottom connection unit 3 specifically includes two third arc-shaped pipe pieces, the bottom connection unit 3 is divided into two symmetrical halves. The third connecting piece can be specifically a bolt, bolt holes corresponding in position are formed in the two third arc-shaped pipe pieces at the moment, the two halves of the bottom connecting unit 3 are locked through fasteners such as bolts, nuts and the like, and the third connecting piece is sleeved outside the pipe cable 4. Optionally, one of the two third axial cut surfaces 36 is provided with a third positioning protrusion 37, and the other is provided with a third positioning groove 38. The third positioning protrusion 37 is matched with the third positioning groove 38, so that the assembly is convenient; the third positioning protrusion 37 and the third positioning groove 38 may be specifically provided at the bolt hole.
In addition, in order to realize the connection of the bottom connection unit 3 and the buoyancy unit 2, in the case that the buoyancy unit 2 is provided with the connection groove 21, one end of the bottom connection unit 3 may be similar to the end structure of the shaft sleeve unit 1, such as providing a convex upper flange 31, the upper flange 31 is located in the connection groove 21 of the buoyancy unit 2, and the main function of the upper flange 31 is to form an interlocking nest with the buoyancy unit 2. The other end of the bottom connecting unit 3 can be designed according to the connecting form of the rigid structural member 5 to be connected, and can be a flange 32 or other forms, and the flange 32 can be provided with flange bolt holes 33 to be fixed with the rigid structural member 5.
It should be noted that, if the marine flexible pipe cable sheath in the present application does not have the rigid structural member 5 such as the pipe cable terminal in the installation section, the marine flexible pipe cable sheath may not have the bottom connection unit 3.
The application provides an installation step of flexible pipe cable sheath in ocean as follows:
(1) the bottom connection unit 3 is mounted on a rigid structural member 5 such as an umbilical termination. This step is omitted if there are no rigid structural members 5 in the installation section of the marine flexible umbilical sheath.
(2) A first bushing unit 1 is installed at a predetermined position on the umbilical 4.
(3) The buoyancy unit 2 is sleeved and mounted on the free end of the bottom coupling unit 3 and the end of the first sleeve unit 1 adjacent to the bottom coupling unit 3.
(4) The next shaft bushing unit 1 and buoyancy unit 2 are installed in sequence until a predetermined installation number is reached.
It should be noted that, in order to optimize the stress of the marine flexible pipe cable 4, it is recommended that the two ends of the marine flexible pipe cable sheath end with the shaft sleeve unit 1 or the bottom connection unit 3.
As can be seen from the above embodiments, the marine flexible pipe cable sheath provided by the present application has the following beneficial effects:
the marine flexible pipe cable sheath comprises a series of shaft sleeve units 1 and buoyancy units 2 which are mutually interlocked and nested, and the bending limit of a pipe cable 4 is realized through the interlocked and nested structure of the shaft sleeve units 1, the buoyancy units 2 and/or a bottom connecting unit 3; the pipe cable 4 is righted in the vertical direction through the net buoyancy of the buoyancy unit 2; in addition, in practical application, the marine flexible pipe cable sheath can be arranged at different length sections of the pipe cable 4, so that the suspended section of the pipe cable 4 can be shaped in water, and the stress and fatigue performance of the suspended section are optimized.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The marine flexible umbilical sheathing provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (8)
1. The utility model provides a flexible pipe cable sheath in ocean, its characterized in that establishes a plurality of axle sleeve units (1) and the cover that is fixed in pipe cable (4) periphery including the cover and locates a plurality of buoyancy unit (2) of pipe cable (4) periphery, axle sleeve unit (1) with buoyancy unit (2) are followed the axial of pipe cable (4) distributes in turn, works as when pipe cable (4) are crooked to predetermineeing the camber, adjacent axle sleeve unit (1) with buoyancy unit (2) offset, in order to avoid pipe cable (4) are crossed and are bent.
2. The marine flexible pipe cable sheath according to claim 1, further comprising a bottom connection unit (3) sleeved on the periphery of the pipe cable (4) and used for being fixedly connected with a rigid structural member (5), wherein all the shaft sleeve units (1) and all the buoyancy units (2) are located on the same side of the bottom connection unit (3).
3. Marine flexible umbilical sheathing according to claim 1, characterized in that the buoyancy unit (2) comprises a body (27) of solid buoyancy material, the body (27) comprising a polymer matrix and a hollow light pressure resistant filler.
4. A marine flexible umbilical sheathing according to claim 3, characterised in that the surface of the body (27) is provided with a protective layer (28).
5. Marine flexible pipe cable sheath according to claims 1-4, characterized in that the two ends of the sleeve unit (1) are respectively provided with a connecting flange (11), and the first inner annular surface (13) of the buoyancy unit (2) is provided with connecting grooves (21) distributed at intervals along the axial direction; when the adjacent shaft sleeve unit (1) is connected with the buoyancy unit (2), the connecting flange (11) on the front side of the shaft sleeve unit (1) is arranged in the connecting groove (21) on the rear side of the previous buoyancy unit (2), the connecting flange (11) on the rear side of the shaft sleeve unit (1) is arranged in the connecting groove (21) on the front side of the later buoyancy unit (2), and a gap is formed between the connecting groove (21) and the corresponding connecting flange (11).
6. Marine flexible umbilical sheathing according to claim 5, characterised in that the cross-sectional area of the connection flange (11) increases from the end face of the connection flange (11) to the middle of the connection flange (11), the cross-section of the connection flange (11) being a cross-section perpendicular to the centre axis of the bushing unit (1); the sectional area of the connecting groove (21) is gradually increased from the end face of the connecting groove (21) to the middle of the connecting groove (21), and the section of the connecting groove (21) is a section perpendicular to the central axis of the buoyancy unit (2).
7. Marine flexible umbilical sheath according to claim 5, characterised in that each of the sleeve units (1) comprises at least two first arcuate tube pieces having a first inner annular surface (13), a first outer annular surface (12), a first axial cut surface (14) connecting the first inner annular surface (13) and the first outer annular surface (12); in the same shaft sleeve unit (1), the first arc-shaped pipe pieces are sequentially distributed along the circumferential direction of the shaft sleeve unit (1), and the first axial tangent planes (14) of the adjacent two first arc-shaped pipe pieces are attached and fixed through first connecting pieces.
8. Marine flexible umbilical sheath according to claim 7, characterised in that one of the first axial cut surfaces (14) is provided with a first locating protrusion (15) and the other first axial cut surface (14) is provided with a first locating groove (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010218888.1A CN111371060B (en) | 2020-03-25 | 2020-03-25 | Marine flexible pipe cable sheath |
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| CN202010218888.1A CN111371060B (en) | 2020-03-25 | 2020-03-25 | Marine flexible pipe cable sheath |
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Cited By (4)
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| CN113161940A (en) * | 2021-04-09 | 2021-07-23 | 天津大学 | Bending limiter with heat dissipation function |
| CN113629649A (en) * | 2021-08-06 | 2021-11-09 | 中天科技海缆股份有限公司 | Floating photovoltaic power station |
| CN114204493A (en) * | 2020-09-17 | 2022-03-18 | 中国石油天然气集团有限公司 | Complete method and complete device for top drive pipe cable |
| CN115149489A (en) * | 2022-06-16 | 2022-10-04 | 海油发展珠海管道工程有限公司 | Distributed buoyancy device and installation method thereof |
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