CN112670937A - Limiting structure for ocean platform impressed current composite cable and operation method - Google Patents
Limiting structure for ocean platform impressed current composite cable and operation method Download PDFInfo
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- CN112670937A CN112670937A CN202011405501.XA CN202011405501A CN112670937A CN 112670937 A CN112670937 A CN 112670937A CN 202011405501 A CN202011405501 A CN 202011405501A CN 112670937 A CN112670937 A CN 112670937A
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Abstract
The invention relates to a limiting structure for an impressed current composite cable of an ocean platform and an operation method, which comprises the following components: the steel tube clamping device comprises a limiting fixture transverse support rod and a cantilever steel tube which are coaxially arranged, the cantilever steel tube is sleeved on the outer wall of the limiting fixture transverse support rod in a sleeved mode, the limiting fixture transverse support rod can slide along the inner wall of the cantilever steel tube, the first end of the limiting fixture transverse support rod is embedded in the cantilever steel tube, the second end of the limiting fixture transverse support rod is fixedly connected with the limiting fixture, the first end of the cantilever steel tube is fixedly connected with a steel ladle plate, and the second end of the cantilever steel tube is a free end and used for containing the limiting fixture transverse support rod. According to the invention, the limiting clamp transversely supports the steel pipe to be inserted into the cantilever steel pipe, and the insertion length can be adjusted according to the actual installation state of the composite cable, so that the influence of the installation precision of the composite cable is small.
Description
Technical Field
The invention relates to a limiting structure for an impressed current composite cable of an ocean platform and an operation method.
Background
When the loss of the sacrificial anode of the offshore jacket platform is serious or the sacrificial anode of the offshore jacket platform is in service for a long time, in order to ensure the safety of the platform structure, a service life prolonging measure is needed. The tension type impressed current cathodic protection system is flexible to install, convenient to maintain and low in system cost, and is a preferable method for corrosion protection and service life extension of the ocean platform. The tension type impressed current cathodic protection system comprises a direct current power supply, a control system, a composite cable consisting of a cable and an auxiliary anode, a tensioning and fixing device, a composite cable upper end connecting part, a composite cable lower end connecting part, a gravity base and the like. The positive pole of the direct current power supply is connected with the auxiliary anode through a cable, the negative pole of the direct current power supply is connected with the jacket platform, and current provided by the direct current power supply flows into the jacket through the anode auxiliary electrode and the seawater and returns to the direct current power supply to form a loop. The jacket platform is subjected to polarization and electric potential negative displacement, so that the jacket platform is protected.
The composite cable can generate side shift under the action of waves and ocean currents, and the excessive side shift can cause the composite cable to generate interference collision with the jacket to influence the safety of the composite cable. The deflection of the composite cable can be reduced by increasing the top tension, but it increases the volume and weight of the gravity base on the seabed, thus making installation inconvenient and increasing the manufacturing and installation costs. Set up limit structure on the platform, can restraint the lateral displacement of compound cable, reduce the requirement to compound cable top tensile force.
Disclosure of Invention
Aiming at the outstanding problems, the invention provides a limiting structure and an operation method for an impressed current composite cable of an ocean platform, the limiting structure can restrict the lateral deviation of the composite cable under the working conditions of extreme environments such as typhoon and the like, so that the composite cable and a jacket structure are ensured not to generate interference collision, and meanwhile, the limiting structure has adjustable length, is slightly influenced by the installation precision of the composite cable and is convenient for offshore construction.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a limiting structure for an impressed current composite cable of an ocean platform, which comprises the following components:
the steel tube clamping device comprises a limiting fixture transverse support rod and a cantilever steel tube which are coaxially arranged, the cantilever steel tube is sleeved on the outer wall of the limiting fixture transverse support rod in a sleeved mode, the limiting fixture transverse support rod can slide along the inner wall of the cantilever steel tube, the first end of the limiting fixture transverse support rod is embedded in the cantilever steel tube, the second end of the limiting fixture transverse support rod is fixedly connected with the limiting fixture, the first end of the cantilever steel tube is fixedly connected with a steel ladle plate, and the second end of the cantilever steel tube is a free end and used for containing the limiting fixture transverse support rod.
The limiting structure preferably comprises a limiting straight pipe and a limiting flared pipe which are coaxially arranged and used for accommodating the composite cable.
The limiting structure is preferably characterized in that the limiting straight pipe and the limiting flared pipe are split limiting pipes which are composed of two semicircular clamping plates, and bolt fasteners are arranged on the two clamping plates and used for fastening and connecting the two clamping plates.
The limiting structure preferably further comprises a plurality of limiting fixture auxiliary brackets which are arranged on the limiting straight pipe and the limiting horn pipe, limiting holes are formed in the limiting fixture auxiliary brackets and are matched with the bolt fasteners, and the limiting structure is used for enhancing the connection strength between the two clamping plates.
The limiting structure is preferably characterized in that the steel clad plate is an arc-shaped plate, the axis of the steel clad plate is perpendicular to the axis of the cantilever steel pipe, and the axis of the transverse supporting rod of the limiting fixture is perpendicular to the axis of the limiting fixture.
The limiting structure preferably further comprises a toggle plate, the toggle plate is arranged at the first end of the cantilever steel pipe and fixedly connected with the ladle plate, and the toggle plate is used for enhancing the connection strength between the ladle plate and the cantilever steel pipe.
The limiting structure preferably further comprises a clamp, the clamp is fixedly connected with the steel ladle plate, and when the limiting structure is used below the water surface, a diver fastens the clamp on the horizontal strut of the jacket platform through bolts.
The limiting structure is preferably arranged in a manner that the second end of the cantilever steel pipe is provided with a groove for positioning and increasing the welding surface.
The limiting structure is preferably provided with a polyurethane cushion layer inside the limiting fixture, and an anti-corrosion coating is coated on the outer surface of the limiting structure.
The second aspect of the present invention provides an operating method of the above-mentioned limiting structure, including the following steps:
a, when the limiting structure is applied to the water surface, the clamping plate is opened, the composite cable is placed into the clamping plate, and the clamping plate is locked through the bolt fastener; after the composite cable is installed, measuring the projection position and the distance of the composite cable on the horizontal stay bar of the jacket platform, adjusting the position of the transverse stay bar of the limiting clamp in the cantilever steel pipe according to the required length to enable the composite cable to be in the center of the limiting clamp in a natural state, and then welding the transverse stay bar of the limiting clamp with the second end of the cantilever steel pipe and the groove; finally, vertically fixing the steel clad plate on the horizontal stay bar of the jacket platform in a welding mode;
b, when the limiting structure is applied below the water surface, opening the clamping plate, putting the composite cable into the clamping plate, and locking the clamping plate through the bolt fastener; after the composite cable is installed, measuring the projection position and the distance of the composite cable on the horizontal stay bar of the jacket platform, adjusting the position of the transverse stay bar of the limiting clamp in the cantilever steel pipe according to the required length to enable the composite cable to be in the center of the limiting clamp in a natural state, and then welding the transverse stay bar of the limiting clamp with the second end of the cantilever steel pipe and the groove; and the clamping is fastened on the horizontal stay bar of the jacket platform by bolts through a diver.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. according to the invention, the limiting clamp transversely supports the steel pipe to be inserted into the cantilever steel pipe, and the insertion length can be adjusted according to the actual installation state of the composite cable, so that the influence of the installation precision of the composite cable is small;
2. according to the invention, the horn mouth-shaped limiting clamp is adopted, and the polyurethane bending-resistant reinforcer is arranged outside the limited composite cable, so that the bending radius of the composite cable under an extreme sea condition is favorably maintained, and the phenomenon of overbending of the composite cable is avoided;
3. according to the invention, the cantilever steel pipe is provided with the groove, so that the welding surface can be enlarged, and the welding firmness of the limiting clamp is improved;
4. according to the invention, the polyurethane cushion layer is arranged on the inner layer of the limiting fixture, so that the friction and collision between the composite cable and the steel limiting fixture can be reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus of the present invention;
FIG. 2 is a front view of the apparatus of the present invention in use above the water surface;
FIG. 3 is a top view of the apparatus of the present invention in use above the water surface;
FIG. 4 is a front view of the apparatus of the present invention in use in a sub-surface situation;
FIG. 5 is a top view of the apparatus of the present invention in use in a sub-surface situation;
FIG. 6 is a layout of the apparatus of the present invention on horizontal struts of a jacket platform;
FIG. 7 is a layout of the apparatus of the present invention on a jacket platform;
the respective symbols in the figure are as follows:
1-a steel clad plate; 2-toggle plate; 3-cantilever steel pipe; 4-a polyurethane cushion layer; 5-a groove; 6-transverse support rods of the limiting clamps; 7-bolt fasteners; 8-limiting a horn tube; 9-auxiliary toggle plate of limiting fixture; 10-jacket platform horizontal brace bar; 11-clamping; 12-a composite cable; 13-a conical buckling-restrained stiffener; 14-bending-resistant stiffener fixing clip; 15-limiting straight pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be understood that the terms "upper end", "lower end", "first end", "second end", and the like are used to limit the components, and are used only for the convenience of distinguishing the components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.
As shown in fig. 1, the present embodiment provides a limiting structure for a tension type impressed current composite cable of an ocean platform, which includes the following components:
the limiting fixture comprises a limiting fixture transverse support rod 6 and a cantilever steel pipe 3 which are coaxially arranged, the cantilever steel pipe 3 is sleeved on the outer wall of the limiting fixture transverse support rod 6 in a sleeved mode, the limiting fixture transverse support rod 6 can slide along the inner wall of the cantilever steel pipe 3, the first end of the limiting fixture transverse support rod 6 is nested in the cantilever steel pipe 3, the second end of the limiting fixture transverse support rod 6 is fixedly connected with the limiting fixture, the first end of the cantilever steel pipe 3 is fixedly connected with a steel plate wrapping plate 1, and the second end of the cantilever steel pipe 3 is a free end and used for containing the limiting fixture transverse support rod 6.
In this embodiment, preferably, the limiting fixture includes a limiting straight tube 15 and a limiting flared tube 8, which are coaxially disposed and are used for accommodating the composite cable 12.
In this embodiment, preferably, the limiting straight tube 15 and the limiting flared tube 8 are both split limiting tubes, and both are composed of two semicircular clamping plates, and each of the two clamping plates is provided with a bolt fastener 7 for fastening the two clamping plates.
In this embodiment, preferably, the clamp further includes a plurality of auxiliary toggle plates 9 for limiting fixtures, the auxiliary toggle plates 9 for limiting fixtures are disposed on the limiting straight tube 15 and the limiting flared tube 8, and limiting holes are formed in the auxiliary toggle plates 9 for limiting fixtures, and the limiting holes are matched with the bolt fasteners 7 and used for enhancing the connection strength between the two clamping plates.
In this embodiment, preferably, the steel clad plate 1 is an arc-shaped plate, an axis of the steel clad plate 1 is perpendicular to an axis of the cantilever steel pipe 3, and an axis of the horizontal stay bar 6 of the limiting fixture is perpendicular to an axis of the limiting fixture.
In this embodiment, preferably, the steel ladle further comprises a toggle plate 2, which is disposed at the first end of the cantilever steel pipe 3, and is fixedly connected to the steel ladle plate 1, so as to enhance the connection strength between the steel ladle plate 1 and the cantilever steel pipe 3.
In this embodiment, as shown in fig. 4, it is preferable that the jacket platform further includes a clamp 11, where the clamp 11 is fixedly connected to the steel plate 1, and when the limiting structure is used under the water surface, the diver bolts the clamp 11 to the horizontal strut 10 of the jacket platform.
In this embodiment, preferably, the second end of the cantilever steel tube 3 is provided with 4 grooves 5 for positioning and enlarging the welding surface.
In this embodiment, preferably, the inner wall of the limiting fixture is provided with a polyurethane cushion layer 4, and the outer surface of the limiting structure is coated with an anticorrosive coating.
In the present embodiment, it is preferable that, as shown in fig. 2 and 4, a tapered bending-resistance reinforcing member 13 is provided outside the composite cable 12 at a predetermined position, and the end portion of the tapered bending-resistance reinforcing member 13 is restrained and limited by a bending-resistance reinforcing member fixing clip 14.
In this embodiment, the limiting structure may be installed above the water surface in a splash zone with a large wave load. Under this situation, the ladle plate 1 adopts the form of welding the ladle plate, and the limiting clamp adopts a lower part single-horn mouth structure.
In this embodiment, the limit structure is preferably also arranged below the water surface, and underwater installation is performed by divers. Under this situation, the steel holding plate 1 adopts the form of bolt holding clamp, and the limiting clamp adopts an upper and lower double-horn mouth structure.
In the processing stage, a steel plate 1, a toggle plate 2 and a cantilever steel pipe 3 are assembled into a whole in a welding mode, and a groove 5 is cut on the cantilever steel pipe 3; the limiting fixture transverse supporting rod 6, the limiting horn tube 8, the limiting fixture auxiliary toggle plate 9, the bolt fastener 7 and the limiting straight tube 15 are assembled into a slicing fixture, and the polyurethane cushion layer 4 is arranged in the fixture.
Based on the above-mentioned limit structure, this specific embodiment also provides an operation method of the limit structure, including the following steps:
a as shown in fig. 2 and 3, when the limiting structure is applied to the water surface, the clamping plate is opened, the composite cable 12 is placed into the clamping plate, and the clamping plate is locked through the bolt fastener 7; after the composite cable 12 is installed, measuring the projection position and the distance of the composite cable 12 on the horizontal stay bar 10 of the jacket platform, adjusting the position of the transverse stay bar 6 of the limiting clamp in the cantilever steel pipe 3 according to the required length to enable the composite cable 12 to be in the center of the limiting clamp in a natural state, and then welding the transverse stay bar 6 of the limiting clamp with the second end of the cantilever steel pipe 3 and the groove 5; finally, vertically fixing the steel clad plate 1 on the horizontal stay bar 10 of the jacket platform in a welding mode;
b, as shown in fig. 4 and 5, when the limiting structure is applied under the water surface, the clamping plate is opened, the composite cable 12 is placed into the clamping plate, and the clamping plate is locked through the bolt fastener 7; after the composite cable 12 is installed, measuring the projection position and the distance of the composite cable 12 on the horizontal stay bar 10 of the jacket platform, adjusting the position of the transverse stay bar 6 of the limiting clamp in the cantilever steel pipe 3 according to the required length to enable the composite cable 12 to be in the center of the limiting clamp in a natural state, and then welding the transverse stay bar 6 of the limiting clamp with the second end of the cantilever steel pipe 3 and the groove 5; the clasps 11 are bolted to the jacket platform horizontal struts 10 by the diver.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A limit structure for ocean platform impressed current composite cable, its characterized in that includes following part:
horizontal vaulting pole of spacing fixture (6) and cantilever steel pipe (3) of coaxial setting, cantilever steel pipe (3) ring cover is in on the outer wall of the horizontal vaulting pole of spacing fixture (6), just horizontal vaulting pole of spacing fixture (6) can along the inner wall of cantilever steel pipe (3) slides, the first end nestification of the horizontal vaulting pole of spacing fixture (6) is in cantilever steel pipe (3), the second end and the spacing fixture fixed connection of the horizontal vaulting pole of spacing fixture (6), the first end and the steel clad plate (1) fixed connection of cantilever steel pipe (3), the second end of cantilever steel pipe (3) is the free end, is used for holding the horizontal vaulting pole of spacing fixture (6).
2. Spacing structure according to claim 1, characterized in that said spacing clip comprises a spacing straight tube (15) and a spacing flared tube (8), coaxially arranged, for housing the composite cable (12).
3. The limiting structure according to claim 2, wherein the limiting straight tube (15) and the limiting flared tube (8) are split limiting tubes, and both of the limiting straight tube and the limiting flared tube are composed of two semicircular clamping plates, and each of the two clamping plates is provided with a bolt fastener (7) for fastening and connecting the two clamping plates.
4. The limiting structure according to claim 3, further comprising a plurality of limiting fixture auxiliary brackets (9) arranged on the limiting straight pipe (15) and the limiting flared pipe (8), wherein limiting holes are formed in the limiting fixture auxiliary brackets (9), and the limiting holes are matched with the bolt fasteners (7) and used for enhancing the connection strength between the two clamping plates.
5. The limiting structure according to claim 1, characterized in that the steel clad plate (1) is an arc-shaped plate, the axis of the steel clad plate (1) is perpendicular to the axis of the cantilever steel pipe (3), and the axis of the limiting fixture transverse stay bar (6) is perpendicular to the axis of the limiting fixture.
6. Limiting structure according to claim 1, further comprising a toggle plate (2) disposed at the first end of the cantilever steel tube (3) and fixedly connected to the steel sheathing plate (1) for enhancing the connection strength between the steel sheathing plate (1) and the cantilever steel tube (3).
7. The stop structure according to claim 1, further comprising a clamp (11), wherein the clamp (11) is fixedly connected with the steel plate (1), and when the stop structure is used under the water surface, a diver bolts the clamp (11) to the horizontal strut (10) of the jacket platform.
8. The limiting structure according to claim 1, wherein the second end of the cantilever steel tube (3) is provided with a groove (5) for positioning and increasing the welding surface.
9. Limiting structure according to claim 1, characterized in that the limiting fixture is provided with a polyurethane cushion (4) inside, and the outer surface of the limiting structure is coated with an anti-corrosion coating.
10. A method of operating a spacing structure as claimed in any of claims 1 to 9, comprising the steps of:
a, when the limiting structure is applied to the water surface, the clamping plate is opened, the composite cable (12) is placed into the clamping plate, and the clamping plate is locked through the bolt fastener (7); after the composite cable (12) is installed, measuring the projection position and the distance of the composite cable (12) on the horizontal stay bar (10) of the jacket platform, adjusting the position of the transverse stay bar (6) of the limiting clamp in the cantilever steel pipe (3) according to the required length to enable the composite cable (12) to be in the center of the limiting clamp in a natural state, and then welding the transverse stay bar (6) of the limiting clamp with the second end of the cantilever steel pipe (3) and the groove (5); finally, the steel clad plate (1) is vertically fixed on the horizontal stay bar (10) of the jacket platform in a welding mode;
b, when the limiting structure is applied under the water surface, the clamping plate is opened, the composite cable (12) is placed into the clamping plate, and the clamping plate is locked through the bolt fastener (7); after the composite cable (12) is installed, measuring the projection position and the distance of the composite cable (12) on the horizontal stay bar (10) of the jacket platform, adjusting the position of the transverse stay bar (6) of the limiting clamp in the cantilever steel pipe (3) according to the required length to enable the composite cable (12) to be in the center of the limiting clamp in a natural state, and then welding the transverse stay bar (6) of the limiting clamp with the second end of the cantilever steel pipe (3) and the groove (5); and the clamping device (11) is fastened on the horizontal stay bar (10) of the jacket platform by a diver through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011405501.XA CN112670937A (en) | 2020-12-03 | 2020-12-03 | Limiting structure for ocean platform impressed current composite cable and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011405501.XA CN112670937A (en) | 2020-12-03 | 2020-12-03 | Limiting structure for ocean platform impressed current composite cable and operation method |
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| CN112670937A true CN112670937A (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011405501.XA Pending CN112670937A (en) | 2020-12-03 | 2020-12-03 | Limiting structure for ocean platform impressed current composite cable and operation method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201787209U (en) * | 2010-09-27 | 2011-04-06 | 中国海洋石油总公司 | Novel clamp device of grouting fixed ocean platform standpipe |
| CN204201282U (en) * | 2014-10-14 | 2015-03-11 | 中国十七冶集团有限公司 | A kind of extension type cable protection support |
| CN206458919U (en) * | 2017-01-06 | 2017-09-01 | 河南大森机电股份有限公司 | A kind of high ferro antidetonation suspension and support that stretches |
| CN209267130U (en) * | 2019-01-23 | 2019-08-16 | 招商局重工(深圳)有限公司 | One kind being used for maritime platform cable activity protective device |
-
2020
- 2020-12-03 CN CN202011405501.XA patent/CN112670937A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201787209U (en) * | 2010-09-27 | 2011-04-06 | 中国海洋石油总公司 | Novel clamp device of grouting fixed ocean platform standpipe |
| CN204201282U (en) * | 2014-10-14 | 2015-03-11 | 中国十七冶集团有限公司 | A kind of extension type cable protection support |
| CN206458919U (en) * | 2017-01-06 | 2017-09-01 | 河南大森机电股份有限公司 | A kind of high ferro antidetonation suspension and support that stretches |
| CN209267130U (en) * | 2019-01-23 | 2019-08-16 | 招商局重工(深圳)有限公司 | One kind being used for maritime platform cable activity protective device |
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Application publication date: 20210416 |
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