CN113495334A - Optical cable protection device for underwater fixed observation equipment and use method thereof - Google Patents
Optical cable protection device for underwater fixed observation equipment and use method thereof Download PDFInfo
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- CN113495334A CN113495334A CN202010267638.7A CN202010267638A CN113495334A CN 113495334 A CN113495334 A CN 113495334A CN 202010267638 A CN202010267638 A CN 202010267638A CN 113495334 A CN113495334 A CN 113495334A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005452 bending Methods 0.000 claims abstract description 142
- 230000006378 damage Effects 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 12
- 239000010935 stainless steel Substances 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 9
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000003014 reinforcing effect Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/506—Underwater installation
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Abstract
The invention discloses an optical cable protection device for underwater fixed observation equipment and a use method thereof, wherein the optical cable protection device comprises an anti-bending protection device and a bending limiting device, wherein the anti-bending protection device comprises an end connecting screw rod, an end flange plate, a front end reinforced connecting keel, a flexible anti-bending cone, a rear end reinforced connecting keel and a rear end connecting ring, and the bending limiting device comprises a bending limiting half tile and a connecting bolt component; through flexible bending-resistant cone and bending limiter device, realize leading the safe and stable of unsettled optical cable to the seabed, avoid the optical cable to cause the fatigue destruction at all the other fixed positions of underwater equipment under the dynamic motion, avoid simultaneously stretching out all the other unsettled or intermittent type nature unsettled optical cables outside certain length can not cross the curved damage when rocking, effectively solve the unsettled section safety problem of optical cable, improve the operation security of optical cable. The device has the advantages of simple structure, simple and convenient installation and use, and good operability and reliability.
Description
Technical Field
The invention relates to an optical cable protection device and a using method thereof, in particular to an optical cable protection device for underwater fixed observation equipment and a using method thereof, and belongs to the technical field of ocean pipe and cable engineering.
Background
With the continuous development and use of human beings on ocean resources, the attention degree of various countries on the ocean field is continuously increased, and in order to improve the understanding of the characteristics of the ocean resources, a plurality of underwater fixed observation devices are generally installed in a sea area so as to observe the condition of the seabed and accumulate information for efficiently developing the seabed resources. Since ocean equity areas are typically more than 20 nautical miles from shore, the observed information needs to be transmitted over submarine cables to a control center onshore. The remote underwater fixed observation equipment is difficult to maintain regularly due to the fact that the underwater fixed observation equipment is far from the coast, and the equipment needs to have good protection capability. The observation equipment is generally designed with a thick and heavy protective cover when being built and installed, and can not be accidentally knocked and damaged in the using process. However, the optical cable for information transmission is in a suspended transition under the action of the marine environment for a long time, particularly from the underwater fixed equipment to the seabed, and is required to be protected under the action of water flow for a long time. If the bending limiter is adopted, only statically fixed cables or optical fibers can be limited, and the bending limiter cannot adapt to the environment with long-term dynamics. If the bending reinforcer is adopted, the bending of the root part of the optical fiber or the cable can only be protected, and the bending reinforcer cannot be used for protecting a longer part, and the longer the size and the longer the length of the bending reinforcer are, the higher the manufacturing cost is, and the protection of the suspended section cable from the fall of the underwater fixing equipment to the seabed part cannot be considered. If this portion of the cable or optical fiber is not effectively protected, it can cause fatigue fracture or fraying and breaking of the cable over time, resulting in failure.
The present application is directed to an optical cable protection device for an underwater fixed observation device and a method for using the same.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provide an optical cable protection device for underwater fixed observation equipment and a using method thereof.
The invention is realized by the following technical scheme:
an optical cable protection device for underwater fixed observation equipment comprises an anti-bending protection device and a bending limiting device;
the anti-bending protection device comprises an end connecting screw rod, an end flange plate, a front end reinforced connecting keel, a flexible anti-bending cone and a rear end reinforced connecting ring of a rear end reinforced connecting keel;
the end part connecting screw rod is a full threaded rod which is subjected to surface special coating treatment and is resistant to marine environment, the end part flange plate is a ring plate made of stainless steel, a threaded hole is formed in the circumference of the end part flange plate, the rear end of the end part connecting screw rod is in threaded connection with the threaded hole formed in the end part flange plate, and a nut is locked at the part of the end part connecting screw rod, which extends out of the length of the end part flange plate;
the front end reinforced connecting keel is of a mesh cage type structure manufactured by bending stainless steel round steel, and the rear end part of the end part flange plate is welded and connected with the front end reinforced connecting keel;
the flexible bending-resistant cone cylinder is a hollow cone cylinder body manufactured by pouring polyurethane elastomer, one end of the flexible bending-resistant cone cylinder, which is tightly attached to the end flange plate, is a front large end, and one end of the flexible bending-resistant cone cylinder, which is tightly attached to the rear end connecting ring, is a rear small end; the main body part of the front end reinforced connecting keel is embedded into the front big end of the flexible bending-resistant cone cylinder, and the cylindrical end surface of the front big end of the flexible bending-resistant cone cylinder is fixedly connected with the end surface of the end flange plate;
the rear end reinforced connecting keel is of a mesh cage type structure manufactured by bending stainless steel round steel, the rear end connecting ring is a ring with a certain degree of outer edge and made of stainless steel material, the rear end reinforced connecting keel is welded with the front end part of the rear end connecting ring, the main body part of the rear end reinforced connecting keel is embedded into the rear small end of the flexible bending-resistant cone cylinder, and the cylindrical end surface of the rear small end of the flexible bending-resistant cone cylinder is fixedly connected with the end surface of the rear end connecting ring;
the bending limiting device is in a structural form of a plurality of groups of sections and comprises a bending limiting half tile and a connecting bolt assembly, wherein the bending limiting half tile is a half tile body poured by polyurethane for a mold, a convex annular table is arranged at one end of the bending limiting half tile, an annular groove is arranged at the other end of the bending limiting half tile, and two symmetrically-installed bending limiting half tiles form a circular sleeve body through the connecting bolt assembly; the convex ring platforms of each group of the bending limit half tiles are clamped into the adjacent bending limit half tile ring grooves, and the convex ring platforms can swing in the ring grooves within the angle range of 3-5 degrees; the ring groove of the bend limiting half-watt at the end of the bend limiting device is connected with the rear end connecting ring.
The invention also relates to a using method of the optical cable protection device for the underwater fixed observation equipment, which comprises the following steps:
step S1: the end part connecting screw rod and the end part flange plate are connected and fixed in a threaded mode, and the front end reinforcing connecting keel is welded to the rear end of the end part flange plate to form a front end steel structural part; meanwhile, the rear end reinforced connecting keel and the rear end connecting ring are connected into a whole to form a rear end cage type structural member; mounting the front-end steel structural part to the front large end of the flexible bending-resistant cone cylinder, mounting the rear-end cage-shaped structural part to the rear small end of the flexible bending-resistant cone cylinder, performing positioning adjustment, pouring a polyurethane elastomer, and demolding and performing secondary vulcanization after pouring to prepare the bending-resistant protection device with certain elasticity; adopting polyurethane for casting a mould to manufacture the bending limit half tile, and preparing the bending limit half tile with certain hardness through demoulding and secondary vulcanization;
step S2: the bending-resistant protection device is pre-penetrated to the front end of the optical cable, the optical cable extends out for a certain length, and the penetrated optical cable is connected with underwater fixed observation equipment and is protected in a watertight manner; aligning the end connecting screw rod with a flange on underwater fixed observation equipment through alignment, and continuously screwing the end connecting screw rod until the end flange plate is tightly attached to the flange of an underwater structure by installing a locking nut at the end of the end connecting screw rod to finish the installation of the anti-bending protection device; installing said corresponding number of said bend limiting devices as required by design analysis and operation;
step S3: the underwater fixed observation equipment is installed at a preset position on the seabed in a hoisting mode, and the posture of the underwater optical cable is controlled, so that damage is avoided; after the underwater fixed observation equipment is installed, the optical cable is slowly lowered into water through the optical cable laying system, and meanwhile, the construction ship moves, so that the optical cable continuously extends out of an outlet of the underwater fixed observation equipment and is stably sunk on a seabed; the suspended section of the optical cable from the outlet of the underwater fixed observation equipment to the seabed part is protected by the anti-bending protection device and the bending limiting device, so that the fatigue damage and the over-bending damage phenomenon of the suspended section of the optical cable after a period of time are avoided;
step S4: when water flow acts on the optical cable and enables the optical cable to swing, the optical cable part on the seabed is driven to swing together, great bending stress is generated on the fixed end part of the optical cable, and the polyurethane elastomer of the flexible bending-resistant cone cylinder deforms to resist the bending stress, so that the safety of the optical cable is protected; meanwhile, the suspended optical cable in water can be bent, the optical cable wrapped inside is limited not to bend and deform beyond the bending radius of the bending limiting device by the aid of the bending limiting half-watt nested clamping, and bending safety of the suspended section of the optical cable is protected.
The invention has the beneficial effects that: by adopting the technical scheme, the optical cable protection device for the underwater fixed observation equipment realizes the safe and stable guiding of the suspended optical cable to the seabed by installing the flexible anti-bending cone cylinder with better elasticity at the outlet of the optical cable of the underwater fixed observation equipment and installing the bending limiter device behind the flexible anti-bending cone cylinder; the flexible bending-resistant cone can avoid fatigue damage of fixed parts of other underwater equipment caused by dynamic motion of the optical cable, and the bending limiter can avoid excessive bending damage of other suspended or intermittent suspended optical cables extending out of a certain length during shaking; through the combination, the safety problem of the suspended section of the optical cable can be effectively solved, and the operation safety of the optical cable is improved; meanwhile, the bending limiter can be infinitely lengthened according to requirements, and the protection effect on the optical cable is further improved. The device has the advantages of simple structure, simple and convenient installation and use, and good operability and reliability.
The invention is further illustrated with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic isometric view of the overall structure of a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of the composition of a preferred embodiment of the present invention;
FIG. 3 is a schematic view of the curved rear axle side of the preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of the preferred embodiment of the present invention in a bent state.
The parts in the drawings are numbered as follows: 1. a bend-resistant protection device; 1.1, connecting a screw rod at the end part; 1.2, end flange plates; 1.3, the front end is reinforced and connected with a keel; 1.4, a flexible bending-resistant cone cylinder; 1.5, the back end is reinforced and connected with a keel; 1.6, a rear end connecting ring; 2. a bending limitation device; 2.1, bend limiting half watt; 2.2, connecting the bolt assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, 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.
As shown in fig. 1 to 4, an optical cable protective device for underwater fixed observation equipment includes a bending resistant protective device 1 and a bending limiting device 2; the anti-bending protection device 1 comprises an end connecting screw rod 1.1, an end flange plate 1.2, a front end reinforced connecting keel 1.3, a flexible anti-bending cone 1.4, a rear end reinforced connecting keel 1.5 and a rear end connecting ring 1.6; the end part connecting screw rod 1.1 is a full threaded rod which is subjected to surface special coating treatment and is resistant to marine environment, the end part flange plate 1.2 is a ring plate made of stainless steel, a threaded hole is formed in the circumference of the end part flange plate 1.2, the rear end of the end part connecting screw rod 1.1 is in threaded connection with the threaded hole formed in the end part flange plate 1.2, and a nut is locked at the part of the end part connecting screw rod 1.1, which extends out of the end part flange plate 1.2, in length; the front end reinforced connecting keel 1.3 is a mesh cage type structure manufactured by bending stainless steel round steel, and the rear end part of the end part flange plate 1.2 is welded with the front end reinforced connecting keel 1.3; the flexible bending-resistant cone 1.4 is a hollow cone body made of polyurethane elastomer by casting, one end of the flexible bending-resistant cone 1.4, which is tightly attached to the end flange plate 1.2, is a front big end, and one end of the flexible bending-resistant cone 1.4, which is tightly attached to the rear end connecting ring 1.6, is a rear small end; the main body part of the front end reinforced connecting keel 1.3 is embedded into the front big end of the flexible anti-bending cone 1.4, and the cylindrical end surface of the front big end of the flexible anti-bending cone 1.4 is fixedly connected with the end surface of the end flange plate 1.2; the rear end reinforced connecting keel 1.5 is a net cage type structure manufactured by bending stainless steel round steel, the rear end connecting ring 1.6 is a ring with a certain degree of outer edge manufactured by stainless steel material, the rear end reinforced connecting keel 1.5 is welded with the front end part of the rear end connecting ring 1.6, the main body part of the rear end reinforced connecting keel 1.5 is embedded into the rear small end of the flexible bending-resistant cone cylinder 1.4, and the cylindrical end surface of the rear small end of the flexible bending-resistant cone cylinder 1.4 is fixedly connected with the end surface of the rear end connecting ring 1.6; the bending limiting device 2 is in a multi-section structural form, the bending limiting device 2 comprises a bending limiting half-tile 2.1 and a connecting bolt component 2.2, the bending limiting half-tile 2.1 is a half-tile body poured by polyurethane for a mould, one end of the bending limiting half-tile 2.1 is provided with a convex ring platform, the other end of the bending limiting half-tile is provided with a ring groove, and two symmetrically-installed bending limiting half-tiles 2.1 form a circular sleeve body through the connecting bolt component 2.2; the convex ring platform of each group of bending limit half-tiles 2.1 is clamped into the adjacent bending limit half-tile 2.1 ring groove, and the convex ring platform can swing in the ring groove within the angle range of 3-5 degrees; the ring groove of the bend limiting half-tile 2.1 at the end of the bend limiting device 2 is connected with the rear connecting ring 1.6.
The using method of the invention is as follows:
the end part connecting screw rod 1.1 and the end part flange plate 1.2 are connected and fixed in a threaded manner, and the front end reinforced connecting keel 1.3 is welded to the rear end of the end part flange plate 1.2 to form a front end steel structural part; meanwhile, the rear end reinforced connecting keel 1.5 and the rear end connecting ring 1.6 are connected into a whole to form a rear end cage type structural member; mounting a front-end steel structural member to the front large end of a flexible bending-resistant cone cylinder 1.4, mounting a rear-end cage-shaped structural member to the rear small end of the flexible bending-resistant cone cylinder 1.4, performing positioning adjustment, then pouring a polyurethane elastomer, and demolding and performing secondary vulcanization after pouring to prepare the bending-resistant protection device 1 with certain elasticity; adopting polyurethane for a mould to cast and manufacture a bending limit half tile 2.1, and preparing the bending limit half tile 2.1 with certain hardness through demoulding and secondary vulcanization;
the bending-resistant protection device 1 is inserted to the front end of the optical cable in advance, the optical cable extends out for a certain length, and the inserted optical cable is connected with underwater fixed observation equipment to be protected in a watertight manner; aligning the end connecting screw rod 1.1 with a flange on underwater fixed observation equipment through alignment, continuously screwing the end connecting screw rod 1.1 until the end flange plate 1.2 is attached to the flange of an underwater structure, and finishing the installation of the anti-bending protection device 1; installing a corresponding number of bend limiting devices 2 according to design analysis and job requirements;
the underwater fixed observation equipment is installed at a preset position on the seabed in a hoisting mode, and the posture of the underwater optical cable is controlled, so that damage is avoided; after the underwater fixed observation equipment is installed, the optical cable is slowly lowered into water through the optical cable laying system, and meanwhile, the construction ship moves, so that the optical cable continuously extends out of an outlet of the underwater fixed observation equipment and is stably sunk on a seabed; the suspended section of the optical cable from the outlet of the underwater fixed observation equipment to the seabed part is protected by the anti-bending protection device 1 and the bending limiting device 2, so that the fatigue damage and the over-bending damage phenomenon of the suspended section of the optical cable after a period of time are avoided;
when water flow acts on the optical cable and enables the optical cable to swing, the optical cable part on the seabed is driven to swing together, great bending stress is generated on the fixed end part of the optical cable, and the polyurethane elastomer of the flexible bending-resistant cone cylinder 1.4 deforms to resist the bending stress, so that the safety of the optical cable is protected; meanwhile, the suspended optical cable in water can be bent and clamped by nesting of the bending limit half-tile 2.1, so that the optical cable wrapped inside is limited not to be bent and deformed beyond the bending radius of the bending limit device 2, and the bending safety of the suspended section of the optical cable is protected.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. An optical cable protection device for underwater fixed observation equipment, characterized by comprising an anti-bending protection device (1) and a bending limiting device (2);
the anti-bending protection device (1) comprises an end connecting screw rod (1.1), an end flange plate (1.2), a front end reinforced connecting keel (1.3), a flexible anti-bending cone cylinder (1.4), a rear end reinforced connecting keel (1.5) and a rear end connecting ring (1.6);
the end connecting screw rod (1.1) is a full threaded rod which is subjected to surface special coating treatment and is resistant to marine environment, the end flange plate (1.2) is a ring plate made of stainless steel, a threaded hole is formed in the circumference of the end flange plate (1.2), the rear end of the end connecting screw rod (1.1) is in threaded connection with the threaded hole formed in the end flange plate (1.2), and a nut is locked on the part of the end connecting screw rod (1.1) extending out of the end flange plate (1.2) in length;
the front end reinforced connecting keel (1.3) is of a mesh cage type structure manufactured by bending stainless steel round steel, and the rear end part of the end part flange plate (1.2) is welded and connected with the front end reinforced connecting keel (1.3);
the flexible bending-resistant cone cylinder (1.4) is a hollow cone cylinder body manufactured by pouring a polyurethane elastomer, one end of the flexible bending-resistant cone cylinder (1.4) close to the end flange plate (1.2) is a front big end, and one end of the flexible bending-resistant cone cylinder (1.4) close to the rear end connecting ring (1.6) is a rear small end; the main body part of the front end reinforced connecting keel (1.3) is embedded into the front large end of the flexible bending-resistant cone cylinder (1.4), and the cylindrical end surface of the front large end of the flexible bending-resistant cone cylinder (1.4) is fixedly connected with the end surface of the end flange plate (1.2);
the rear end reinforced connecting keel (1.5) is of a mesh cage type structure manufactured by bending stainless steel round steel, the rear end connecting ring (1.6) is a ring with a certain degree of outer edge manufactured by stainless steel materials, the rear end reinforced connecting keel (1.5) is welded with the front end part of the rear end connecting ring (1.6), the main body part of the rear end reinforced connecting keel (1.5) is embedded into the rear small end of the flexible bending-resistant cone cylinder (1.4), and the cylindrical end surface of the rear small end of the flexible bending-resistant cone cylinder (1.4) is fixedly connected with the end surface of the rear end connecting ring (1.6);
the bending limiting device (2) is in a multi-section structural form, the bending limiting device (2) comprises a bending limiting half tile (2.1) and a connecting bolt assembly (2.2), the bending limiting half tile (2.1) is a half tile body poured by polyurethane for a mold, one end of the bending limiting half tile (2.1) is provided with a convex annular table, the other end of the bending limiting half tile is provided with an annular groove, and two symmetrically-installed bending limiting half tiles (2.1) form a circular sleeve body through the connecting bolt assembly (2.2); the convex ring platform of each group of the bending limit half-tiles (2.1) is clamped into the adjacent ring groove of the bending limit half-tile (2.1), and the convex ring platform can swing in the ring groove within the angle range of 3-5 degrees; the annular groove of the bending limiting half tile (2.1) at the end of the bending limiting device (2) is connected with the rear connecting ring (1.6).
2. An optical cable protection device for underwater fixed observation equipment and a use method thereof, wherein the optical cable protection device for underwater fixed observation equipment as claimed in claim 1 is adopted, and is characterized in that: the use method of the optical cable protection device for the underwater fixed observation equipment comprises the following steps:
step S1: the end part connecting screw rod (1.1) and the end part flange plate (1.2) are connected and fixed in a threaded mode, and the front end reinforced connecting keel (1.3) is welded to the rear end of the end part flange plate (1.2) to form a front end steel structural part; meanwhile, the rear end reinforced connecting keel (1.5) and the rear end connecting ring (1.6) are connected into a whole to form a rear end cage type structural member; mounting the front-end steel structural part to the front large end of the flexible bending-resistant cone cylinder (1.4), mounting the rear-end cage-shaped structural part to the rear small end of the flexible bending-resistant cone cylinder (1.4), casting a polyurethane elastomer after positioning and adjusting, and demoulding and secondary vulcanization are carried out after casting to obtain the bending-resistant protection device (1) with certain elasticity; adopting polyurethane for a mould to cast and manufacture the bending limit half-tile (2.1), and preparing the bending limit half-tile (2.1) with certain hardness through demoulding and secondary vulcanization;
step S2: the bending-resistant protection device (1) is pre-penetrated to the front end of the optical cable and the optical cable extends out for a certain length, and the penetrated optical cable is connected with underwater fixed observation equipment and is well protected in a watertight manner; aligning the end connecting screw rod (1.1) with a flange on underwater fixed observation equipment through alignment, and continuously screwing until the end flange plate (1.2) is attached to a flange of an underwater structure through mounting a locking nut at the end of the end connecting screw rod (1.1) to finish the mounting of the anti-bending protection device (1); -installing said corresponding number of said bending limitation units (2) according to design analysis and operational requirements;
step S3: the underwater fixed observation equipment is installed at a preset position on the seabed in a hoisting mode, and the posture of the underwater optical cable is controlled, so that damage is avoided; after the underwater fixed observation equipment is installed, the optical cable is slowly lowered into water through the optical cable laying system, and meanwhile, the construction ship moves, so that the optical cable continuously extends out of an outlet of the underwater fixed observation equipment and is stably sunk on a seabed; the suspended section of the optical cable from the outlet of the underwater fixed observation equipment to the seabed part is protected by the anti-bending protection device (1) and the bending limiting device (2), so that the fatigue damage and the over-bending damage phenomenon of the suspended section of the optical cable after a period of time are avoided;
step S4: when water flow acts on the optical cable and enables the optical cable to swing, the optical cable part on the seabed is driven to swing together, great bending stress is generated on the fixed end part of the optical cable, and the polyurethane elastomer of the flexible bending-resistant cone cylinder (1.4) deforms to resist the bending stress, so that the safety of the optical cable is protected; meanwhile, the suspended optical cable in water can be bent, the optical cable wrapped inside is limited not to be bent and deformed beyond the bending radius of the bending limiting device (2) by the nested clamping of the bending limiting half-tile (2.1), and the bending safety of the suspended section of the optical cable is protected.
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| CN202010267638.7A CN113495334A (en) | 2020-04-08 | 2020-04-08 | Optical cable protection device for underwater fixed observation equipment and use method thereof |
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| CN202010267638.7A CN113495334A (en) | 2020-04-08 | 2020-04-08 | Optical cable protection device for underwater fixed observation equipment and use method thereof |
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