CN113212657A - Self-installation offshore platform - Google Patents
Self-installation offshore platform Download PDFInfo
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- CN113212657A CN113212657A CN202110581431.1A CN202110581431A CN113212657A CN 113212657 A CN113212657 A CN 113212657A CN 202110581431 A CN202110581431 A CN 202110581431A CN 113212657 A CN113212657 A CN 113212657A
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- pile
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- offshore platform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
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Abstract
The invention provides a self-installation offshore platform, and relates to the field of offshore platforms. The self-installation offshore platform comprises a ship body, a lifting mechanism and at least three pile legs, wherein the at least three pile legs are circumferentially installed on the ship body at intervals; the pile leg is provided with a connecting anchor point, an anchor chain is connected between the winch and the connecting anchor point, the pile leg has a rising state and a lowering state, and the connecting anchor point is positioned close to the ship body in the rising state; when the ship is in a downward placing state, a vertical space is formed between the connecting anchor point and the ship body, and the anchor chain or the rope is inclined to the pile leg and tensioned between the connecting anchor point and the winch. The tensioning effect of anchor chain or rope forms effectual anti-tilt restraint to the spud leg, prevents that the relative hull of spud leg from rocking, compares in prior art and has saved the operation of special installation coupling assembling, utilizes winch and anchor chain or rope can pin the spud leg fast, effectively, and the actual operation degree of difficulty is low and locking effect is better.
Description
Technical Field
The invention relates to the technical field of offshore platforms, in particular to a self-installation offshore platform.
Background
With the large-scale construction of offshore wind power, as offshore wind power plants are far away, an offshore direct current converter station platform is adopted to convert alternating current into direct current and transmit the direct current to the land, and the offshore wind power plants gradually become a power transmission means for high-efficiency transmission.
Under the general condition, marine converter station platform is basically the same with other marine self-installing platforms's structural design, chinese utility model patent that the publication number of granting is CN210066692U, publication date is 2020.02.14 discloses a support spud leg and marine self-installing platform, and specifically disclose this marine self-installing platform include the hull, the well head frame, support spud leg and upper portion module, still including the elevating gear who installs in the hull, support spud leg includes two at least spud legs and coupling assembling, two adjacent spud legs are provided with a set of coupling assembling, coupling assembling includes at least one horizontal pole and at least one diagonal brace, two adjacent spud legs are connected at the both ends of each horizontal pole, two adjacent spud legs are connected at the both ends of each diagonal brace, form a triangular connection structure at least between every group coupling assembling and two adjacent spud legs.
The offshore self-installing platform in the prior art adopts a design form that a horizontal rod and an inclined strut are arranged between two pile legs, and the support of the pile legs is more stable through the connecting component. However, in the installation process of the platform, because the pile legs need to be lifted relative to the ship body, after the pile legs are lifted in place, the horizontal rods and the inclined support rods are connected between the pile legs, the installation difficulty of the connecting assembly is large, and the pile legs are difficult to lock quickly and effectively.
Disclosure of Invention
In order to solve the above problems, the present invention provides a self-installing offshore platform, so as to solve the problem that the existing offshore self-installing platform has difficulty in installing the connecting assembly because the horizontal rod and the diagonal brace are connected between the pile legs after the pile legs are lifted in place, and the pile legs are difficult to lock quickly and effectively.
The technical scheme of the self-installation offshore platform is as follows:
the self-installation offshore platform comprises a ship body, a lifting mechanism and at least three pile legs, wherein the at least three pile legs are circumferentially installed on the ship body at intervals, the lifting mechanism is in transmission connection with the pile legs, a winch is further arranged on the ship body, and the winch and the pile legs are arranged in a staggered mode;
the pile leg is provided with a connecting anchor point, an anchor chain or a rope is connected between the winch and the connecting anchor point, the pile leg has a rising state and a lowering state, and the connecting anchor point is close to the ship body in the rising state; when the ship is in a lowering state, a vertical space is formed between the connecting anchor point and the ship body, and the anchor chain or the rope is inclined to the pile leg and tensioned between the connecting anchor point and the winch.
Furthermore, the pile legs are respectively connected with two anchor chains or ropes, and when the pile legs are placed downwards, the vertical projections of the two anchor chains or ropes are arranged at an included angle.
Furthermore, the hull is square in outline shape, the number of the pile legs is four, the four pile legs are respectively arranged at the top corners of the hull, and the winches are respectively arranged at the positions, close to the side edges, of the hull.
Furthermore, the hull is rectangular in outline shape, two first winches are arranged on the length edge of the hull respectively, the two first winches are arranged at intervals along the length direction of the hull, and longitudinal anchor chains are connected between the first winches and the pile legs corresponding to the vertex angle positions.
Furthermore, second winches are respectively arranged on the width edges of the ship body, and transverse anchor chains are respectively connected between the second winches and the pile legs.
Furthermore, a locking mechanism is further arranged on the ship body and used for being matched with the pile legs in a locking mode when the pile legs are in a lifting state or a lowering state.
Furthermore, the winch is installed on the upper side of the ship body, a guide seat is arranged on the lower side of the ship body, a guide wheel is rotatably installed on the guide seat, and the anchor chain or the rope is wound outside the guide wheel.
Furthermore, the lower end of the pile leg is provided with a pile shoe, and the pile shoe is embedded and fixed in the seabed in a downward state.
Further, still be equipped with power module on the hull, power module is connected with the transmission of electricity cable, still be fixed with the cable protection pipe on the spud leg, the dress is worn to the transmission of electricity cable in the cable protection pipe.
Further, the anchor chain is a steel chain, or the rope is a steel cable, and the steel chain or the steel cable is conductively connected with cathode anticorrosion equipment.
Has the advantages that: the self-installation offshore platform adopts the structural design of a ship body, a lifting mechanism, at least three pile legs and a winch, wherein the pile legs are provided with connecting anchor points, an anchor chain or a rope is connected between the connecting anchor points and the winch, and the winch is used for tensioning the anchor chain or the rope so as to form a fastening and restraining effect between the pile legs and the ship body; when the pile legs are in a lifting state, the connecting anchor points of the pile legs are close to the ship body, the anchor chains or the ropes are reeled up through the winch, and the pile legs are reeled up on the ship body so as to drag and transport the offshore platform to an operation field; after the anchor chain reaches the operation site, the lifting mechanism works to lower the pile leg, and simultaneously the winch synchronously releases the anchor chain or the rope.
When the pile leg is in a lowering state, the pile leg is inserted into the seabed, the pile leg is stably pressed into the seabed by means of the dead weight of the pile leg and pile pressing operation, the lifting mechanism stops the pile leg and does not lift any more, then the winch works to tighten the anchor chain or the rope, the tension force of the anchor chain or the rope reaches a preset tension value, and the tension direction of the anchor chain or the rope is inclined to the pile leg to extend, namely, an effective anti-tilting constraint effect is formed on the pile leg under the tension effect of the anchor chain or the rope, so that the pile leg is prevented from shaking relative to the ship body. Compared with the prior art that the horizontal rods and the inclined support rods are connected between the pile legs, the operation of specially installing the connecting assembly is omitted, the pile legs can be quickly and effectively locked by the aid of the winch and the anchor chain or the rope, actual operation difficulty is low, and locking effect is good.
Drawings
FIG. 1 is a schematic front view of a leg of a self-installing offshore platform in a raised condition in an embodiment of the self-installing offshore platform of the present invention;
FIG. 2 is a schematic front view of a self-installing offshore platform with legs lowered in an embodiment of the self-installing offshore platform of the present invention;
fig. 3 is a schematic top view of the self-installing offshore platform of fig. 2.
In the figure: 1-hull, 10-power module, 11-crane, 12-hoisting hole, 2-spud leg, 20-spud shoe, 21-cable protection pipe, 22-connection anchor point, 3-winch, 31-first winch, 32-second winch, 33-guide seat and 41-longitudinal anchor chain.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In a specific embodiment 1 of the self-installing offshore platform of the present invention, as shown in fig. 1 to 3, the self-installing offshore platform includes a hull 1, a lifting mechanism (not shown in the figure) and at least three spud legs 2, the at least three spud legs 2 are circumferentially installed on the hull 1 at intervals, the lifting mechanism is in transmission connection with the spud legs 2, a winch 3 is further disposed on the hull 1, and the winch 3 and the spud legs 2 are arranged in a staggered manner; the pile leg 2 is provided with a connecting anchor point 22, an anchor chain is connected between the winch 3 and the connecting anchor point 22 of the pile leg 2, the pile leg 2 has a rising state and a lowering state, and the connecting anchor point 22 of the pile leg 2 is positioned close to the ship body 1 in the rising state; when the pile is lowered, a vertical space is formed between the connecting anchor point 22 of the pile leg 2 and the ship body 1, and the anchor chain is inclined to the pile leg 2 and tensioned between the connecting anchor point 22 and the winch 3.
The self-installation offshore platform adopts the structural design of a ship body 1, a lifting mechanism, at least three pile legs 2 and a winch 3, wherein the pile legs 2 are provided with connecting anchor points 22, an anchor chain is connected between the connecting anchor points 2 and the winch 3, and the winch 3 is utilized to tension the anchor chain so as to form a fastening constraint effect between the pile legs 2 and the ship body 1; when the pile leg 2 is in a lifting state, the connection anchor point 22 of the pile leg 2 is close to the ship body 1, the anchor chain is reeled up through the winch 3, and the pile leg 2 is reeled up on the ship body 1 so as to drag and transport the offshore platform to a working site; after arriving at the operation site, the lifting mechanism works to lower the pile leg 2, and simultaneously the winch 3 synchronously releases the anchor chain.
When spud leg 2 is in the state of transferring, 2 insert and bury to the seabed in the spud leg, rely on the dead weight of spud leg 2 and pile pressing operation, make spud leg 2 impress the seabed steadily, elevating system shuts down spud leg 2 and no longer goes up and down, then winch 3 works and strains the anchor chain, treat that the tension of anchor chain reaches preset tension value, because the tension direction slope of anchor chain extends in spud leg 2, form effectual anti-tilt constraint effect to spud leg 2 under the tensioning of anchor chain promptly, prevent that spud leg 2 from taking place to rock for hull 1. Compared with the prior art that the horizontal rods and the inclined support rods are connected between the pile legs, the operation of specially installing the connecting assembly is omitted, the pile legs 2 can be quickly and effectively locked by the winch 3 and the anchor chain, the actual operation difficulty is low, and the locking effect is better.
In the embodiment, the pile leg 2 is respectively connected with two anchor chains, and the vertical projections of the two anchor chains are arranged in an included angle in a downward placing state; when the pile is placed, the vertical projections of the two anchor chains connected to the pile legs 2 form an included angle, and the two anchor chains are utilized to generate tension forces in different directions for the same pile leg 2, so that anti-tilt constraint in the front-back direction and the left-right direction is formed, and the pile leg 2 is ensured not to tilt in any direction. The ship body 1 is square in outline shape, the number of the pile legs 2 is four, the four pile legs 2 are respectively arranged at the top corners of the ship body 1, and winches 4 are respectively arranged at the positions, close to the side edges, of the ship body 1. The four pile legs 2 are arranged at the top corners of the ship body 1, and the stable plane supporting effect is achieved on the ship body 1 through the four-point arranged pile legs 2.
Specifically, the hull 1 is rectangular in outline shape, two first winches 31 are respectively arranged at the length edge of the hull 1, the two first winches 31 are arranged at intervals along the length direction of the hull 1, and a longitudinal anchor chain 41 is connected between each first winch 31 and the corresponding pile leg 2 at the vertex angle position. And the width edge of the ship body 1 is respectively provided with a second winch 32, and a transverse anchor chain is connected between each second winch 32 and the pile leg 2. Because the length space of rectangular hull 1 is bigger, can hold at the length edge of hull 1 and set up two first hanks 31, be located and be connected vertical anchor chain 41 between the first hank 31 on left and the spud leg 2 of left end apex angle, be located and be connected vertical anchor chain 41 between the first hank 31 on right side and the spud leg 2 of right end apex angle, utilize two first hanks 31 respectively with correspond to be connected vertical anchor chain 41 between the spud leg 2 of apex angle position to form vertical anti-tilt restraining force to corresponding spud leg 2.
It should be noted that a second winch 32 is respectively arranged at the width edge of the ship body 1, and a transverse anchor chain is respectively connected between one second winch 32 and the two pile legs 2 at the corresponding vertex angle positions, so that a transverse anti-tilt restraining force is formed on the corresponding pile leg 2, and under the combined action of the longitudinal anti-tilt restraining force and the transverse anti-tilt restraining force, the anti-tilt purpose in any direction in a plane is realized, and the structural rigidity and stability of the whole offshore platform are improved.
In order to meet different use requirements, in other embodiments, the number of the pile legs and the shape of the ship body can be flexibly designed, for example: three pile legs which are circumferentially arranged at intervals can be designed, the three pile legs can also play a stable surface supporting role on the ship body, and correspondingly, the outline shape of the ship body can be triangular, square, other polygons, circular, oval and the like. In addition, the number of the pile legs can be designed to be more than four, and the arrangement positions of the pile legs can be flexibly adjusted. And a locking mechanism (not shown in the figure) is further arranged on the hull 1 and is used for locking and matching with the pile legs 2 when the pile legs 2 are in a rising state or a lowering state, the locking mechanism is used for performing vertical locking on the pile legs 2, and a three-dimensional locking effect is formed under the condition that the longitudinal anchor chains 41 and the transverse anchor chains are matched together.
The winch 3 is installed on the upper side of the ship body 1, the guide seat 33 is arranged on the lower side of the ship body 1, the guide wheel is installed on the guide seat 33 in a rotating mode, the anchor chain is wound outside the guide wheel, and the guide seat 33 and the guide wheel are designed on the lower side of the ship body 1, so that the anchor chain is convenient to arrange and connect. Moreover, the lower end of the pile leg 2 is provided with the pile shoe 20, and the pile shoe 20 is inserted and fixed in the seabed in the lowering state, and the shape of the pile shoe 20 can be circular or octagonal, so that the surface area of the lower end of the pile leg 2 can be increased, the pile leg 2 can be reliably cushioned, and the pile leg 2 can be prevented from sinking in the seabed.
In this embodiment, the hull 1 is further provided with a power module 10, that is, the self-installed offshore platform can be used as a converter station platform of an offshore wind farm, the power module 10 is connected with a power transmission cable, the leg 2 is further fixed with a cable protection tube 21, and the power transmission cable is inserted into the cable protection tube 21. In addition, a crane 11 and a lifting hole 12 are arranged on the ship body 1 so as to lift the installation equipment to the ship body 1. In addition, the anchor chain is a steel chain, the steel chain is conductively connected with cathode anticorrosion equipment, and the cathode anticorrosion equipment is electrified to play an electrochemical anticorrosion role in the anchor chain. In other embodiments, in order to meet different use requirements, the anchor chain can be replaced by a rope, in particular a steel rope, and the steel rope is conductively connected with a cathode anticorrosion device; or the rope can be designed into a composite rope, and the composite rope is stable in material and cannot be aged or corroded after long-term work in seawater.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A self-installation offshore platform is characterized by comprising a hull, a lifting mechanism and at least three pile legs, wherein the at least three pile legs are circumferentially installed on the hull at intervals;
the pile leg is provided with a connecting anchor point, an anchor chain or a rope is connected between the winch and the connecting anchor point, the pile leg has a rising state and a lowering state, and the connecting anchor point is close to the ship body in the rising state; when the ship is in a lowering state, a vertical space is formed between the connecting anchor point and the ship body, and the anchor chain or the rope is inclined to the pile leg and tensioned between the connecting anchor point and the winch.
2. The self-installing offshore platform according to claim 1, wherein the legs are connected with two anchor chains or ropes, respectively, and in a lowered state, vertical projections of the two anchor chains or ropes are arranged at an included angle.
3. The self-installing offshore platform according to claim 1, wherein the hull is square in profile, the number of legs is four, the four legs are respectively arranged at the top corners of the hull, and the winches are respectively arranged at the positions of the hull close to the side edges.
4. The self-installing offshore platform according to claim 3, wherein the hull is rectangular in outline, two first winches are respectively arranged at the length edges of the hull, the two first winches are arranged at intervals along the length direction of the hull, and a longitudinal anchor chain is connected between each first winch and the corresponding pile leg at the vertex angle position.
5. The self-installing offshore platform according to claim 4, wherein the width edges of the hull are further provided with second winches respectively, and transverse anchor chains are connected between the second winches and the pile legs respectively.
6. A self-installing offshore platform according to claim 1, wherein the hull further comprises locking means for locking engagement with the legs when the legs are in the raised or lowered position.
7. The self-installing offshore platform according to claim 1, wherein the winch is installed on the upper side of the hull, a guide seat is arranged on the lower side of the hull, a guide wheel is rotatably installed on the guide seat, and the anchor chain or the rope is wound on the outer portion of the guide wheel.
8. The self-installing offshore platform of claim 1, wherein the legs have shoes at their lower ends, the shoes being embedded and secured in the seabed in the lowered position.
9. The self-installing offshore platform according to claim 1, wherein a power module is further arranged on the hull, the power module is connected with a power transmission cable, a cable protection pipe is further fixed on the pile leg, and the power transmission cable penetrates through the cable protection pipe.
10. A self-installing offshore platform according to claim 1, wherein the anchor chain is a steel chain or the rope is a steel cable, the steel chain or the steel cable being conductively connected to cathodic corrosion protection equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110581431.1A CN113212657A (en) | 2021-05-26 | 2021-05-26 | Self-installation offshore platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110581431.1A CN113212657A (en) | 2021-05-26 | 2021-05-26 | Self-installation offshore platform |
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| CN113212657A true CN113212657A (en) | 2021-08-06 |
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| CN202110581431.1A Pending CN113212657A (en) | 2021-05-26 | 2021-05-26 | Self-installation offshore platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832941A (en) * | 2021-10-26 | 2021-12-24 | 北部湾大学 | Support system for inhibiting dynamic response of deep water self-elevating platform and operation method |
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| GB1249548A (en) * | 1968-10-07 | 1971-10-13 | Ihc Holland Nv | Apparatus for providing an under-water anchorage system on a firm or rocky sea bottom |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113832941A (en) * | 2021-10-26 | 2021-12-24 | 北部湾大学 | Support system for inhibiting dynamic response of deep water self-elevating platform and operation method |
| CN113832941B (en) * | 2021-10-26 | 2022-10-25 | 北部湾大学 | Supporting system for inhibiting dynamic response of deepwater self-elevating platform and operation method |
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