CN115012377B - Bolt type pile leg structure of offshore platform - Google Patents
Bolt type pile leg structure of offshore platform Download PDFInfo
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- CN115012377B CN115012377B CN202210813751.XA CN202210813751A CN115012377B CN 115012377 B CN115012377 B CN 115012377B CN 202210813751 A CN202210813751 A CN 202210813751A CN 115012377 B CN115012377 B CN 115012377B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
- E02B17/024—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform shock absorbing means for the supporting construction
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
- E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
- E02B17/0809—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/72—Pile shoes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B2017/0056—Platforms with supporting legs
- E02B2017/0073—Details of sea bottom engaging footing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Revetment (AREA)
Abstract
The invention provides a plug pin type pile leg structure of an offshore platform, and relates to the field of pile legs. The bolt type pile leg structure of the offshore platform comprises a cylindrical pile leg and a reinforcing web, wherein the cylindrical pile leg is provided with a plurality of pin holes, the reinforcing web is fixedly connected to the outer side of the cylindrical pile leg, and the reinforcing web is provided with perforations corresponding to the pin holes; the inner side of the cylindrical pile leg is fixedly connected with a plurality of sealing shells, the sealing shells are respectively covered outside the corresponding pin holes, and a plug pin accommodating cavity, the pin holes and the through holes of the sealing shells are sequentially communicated from inside to outside to form plug-in channels; the perforated hole edge is flush with the hole edge of the pin hole, the hole edge of the pin hole protrudes out of the inner side of the sealing shell, an elastic gasket is arranged in the sealing shell, and an annular oil cavity is formed in the elastic gasket; the elastic gasket has a pressurized state and a pressure relief state, and hydraulic oil is filled in the annular oil cavity in the pressurized state, so that the elastic gasket expands inwards in the radial direction and radially abuts against the bolt, and the pressure of the bolt directly acting on the cylindrical pile leg is effectively buffered.
Description
Technical Field
The invention relates to the technical field of spud legs, in particular to a plug pin type spud leg structure of an offshore platform.
Background
In the ocean energy engineering, the engineering of offshore wind power stations, offshore oil production wells and the like are all based on offshore platforms. Offshore platforms typically employ pin-lift systems for lifting operations, and reliability of the leg structure is critical.
Because the gravity of the offshore platform acts on the spud leg pin hole through the bolt of the lifting system, the spud leg pin hole is subjected to large load, and the spud leg local structure is easy to damage after long-time stress. Subsequently, the Chinese patent application with the application publication number of CN108385643A and the application publication date of 2018.08.10 discloses a platform lifting hydraulic plug-pin type pile leg, and particularly discloses that the platform lifting hydraulic plug-pin type pile leg comprises a cylinder body and a strip-shaped flitch; the strip-shaped flitch is provided with bolt holes which are arranged at intervals, and the bolt holes are in one-to-one correspondence with the bolt holes on the cylinder body; the strip-shaped flitch is welded and fixed with the cylinder. The pile leg is reinforced in a mode of penetrating through the length of the whole pile leg and is attached to the outer side of the pile leg, and round holes with the same center and diameter are correspondingly formed in the bolt holes in the pile leg, so that the pile leg near the bolt can be locally reinforced, and the overall strength of the pile leg can be increased.
Although the lifting hydraulic plug pin type pile leg of the platform in the prior art strengthens the cylinder body by using the strip-shaped flitch, the contact area between the plug pin and the pin hole is still small, the pile leg can not be ensured to bear the platform for a long time, and the reliability and the safety of the pile leg structure are low.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a pin-type pile leg structure of an offshore platform, so as to solve the problems that the contact area between the pin and the pin hole is still small, the pile leg can not be ensured to bear the platform for a long time, and the reliability and safety of the pile leg structure are low.
The technical scheme of the bolt type pile leg structure of the offshore platform is as follows:
the bolt type pile leg structure of the offshore platform comprises a cylindrical pile leg and a reinforcing web, wherein a plurality of pin holes are formed in the cylindrical pile leg, the pin holes are distributed at intervals along the axial direction of the cylindrical pile leg, the reinforcing web is fixedly connected to the outer side of the cylindrical pile leg, and the reinforcing web is provided with perforations corresponding to the pin holes;
the inner side of the cylindrical pile leg is fixedly connected with a plurality of sealing shells, the sealing shells are respectively covered outside the corresponding pin holes, a plug pin accommodating cavity is formed in the sealing shells, and the plug pin accommodating cavity, the pin holes and the through holes are sequentially communicated from inside to outside to form plug-in channels;
the perforated hole edge is flush with the hole edge of the pin hole, the hole edge of the pin hole protrudes out of the inner side of the sealing shell, an elastic gasket is arranged in the sealing shell, an annular oil cavity is arranged in the elastic gasket, and an oiling interface communicated with the annular oil cavity is arranged on the elastic gasket;
the elastic gasket is in a pressurized state and a pressure relief state, and hydraulic oil is filled in the annular oil cavity in the pressurized state so that the elastic gasket expands inwards in the radial direction and radially abuts against the bolt; and in a pressure relief state, hydraulic oil is discharged from the annular oil cavity, so that the elastic gasket is contracted outwards in the radial direction and separated from the bolt.
Further, the cylindrical pile leg is of a cylindrical structure, the reinforcing web is a long plate, the width section outline of the reinforcing web is arc-shaped, and the reinforcing web is in fit connection with the cylindrical pile leg.
Further, the outer edge of the reinforcing web is welded with the outer wall of the cylindrical pile leg, and the perforated hole edge is welded with the outer wall of the cylindrical pile leg.
Further, the outer edge of the reinforcing web plate and the perforated hole edge are provided with chamfer edges, and the chamfer edges of the reinforcing web plate are in surfacing connection with the outer wall of the cylindrical pile leg.
Further, the seal shell comprises an annular side wall and a cover plate, the cover plate is fixedly connected with the annular side wall, the annular side wall is arranged outside the pin hole in a surrounding mode, and the annular side wall and the pin hole are coaxially arranged.
Further, the elastic gasket is made of rubber materials, the elastic gasket is in concave-convex fit with the annular side wall, the outline shape of the annular oil cavity is a circular shape with the upper part thin and the lower part thick and gradually arranged, the lower side part of the elastic gasket corresponds to the thick diameter section of the annular oil cavity, and the lower side part of the elastic gasket is used for radially propping against the bolt in a pressurized state.
Further, a plurality of rib plates are fixedly arranged between the annular side wall and the inner wall of the cylindrical pile leg, and the rib plates are distributed radially about the center of the sealing shell.
Further, the inner peripheral wall of the elastic gasket is further provided with a positioning groove, a pressure sensor is installed in the positioning groove, a detection surface of the pressure sensor is flush with the inner peripheral wall of the elastic gasket, and the pressure sensor is used for detecting the pressing force of the elastic gasket on the bolt in a pressing state.
Further, the device also comprises an oil circuit system, wherein the oil circuit system is arranged in the cylindrical pile leg, and the oil circuit system is connected with the oiling interface of the elastic gasket.
Further, the hydraulic control system is electrically connected with the pressure sensor, and is used for receiving a pressure signal detected by the pressure sensor and controlling the oil circuit system to stop injecting hydraulic oil into the elastic gasket when the pressure value reaches a set pressure.
The beneficial effects are that: the bolt type pile leg structure of the offshore platform comprises a cylindrical pile leg, a reinforcing web, a sealing shell and an elastic gasket, wherein the reinforcing web is fixedly connected to the outer side of the cylindrical pile leg, and pin holes of the cylindrical pile leg correspond to the through holes of the reinforcing web; the seal shell is fixedly connected to the inner side of the cylindrical pile leg, and the seal shell is covered outside the corresponding pin hole. The pin accommodating cavity of the sealing shell, the pin holes of the cylindrical pile legs and the perforations of the reinforcing webs are sequentially communicated from inside to outside to form a plug-in channel, so that the pins of the lifting system can extend into the plug-in channel, and the aim of reliably fixing the offshore platform is fulfilled; the sealing shell can prevent external seawater from entering the inside of the cylindrical pile leg, and plays a role in separating the inside space and the outside space of the pile leg in a watertight manner.
Wherein, perforated hole along the parallel and level setting with the pinhole, pinhole and perforated hole along all protruding in the inboard of seal shell, install the elastic washer in the seal shell, the inside of elastic washer is equipped with annular oil pocket, and the elastic washer is equipped with the oiling interface, can pour into hydraulic oil or supply hydraulic oil to outside the discharge in the annular oil pocket through the oiling interface. When the bolt is inserted in place, hydraulic oil is injected into the annular oil cavity through the oil injection interface, so that the elastic gasket expands inwards along the radial direction and the inner peripheral wall of the elastic gasket is propped against the bolt, the elastic gasket can fully support the bolt after being pressurized, the contact area between the bolt and the pile leg structure is increased, the pressure of the bolt directly acting on the cylindrical pile leg is effectively buffered, the condition that structural damage occurs due to small stress area is avoided, and the reliability and safety of the pile leg structure are improved.
Drawings
FIG. 1 is a schematic front view of a latch-type leg structure of an offshore platform according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of a leg structure at a pin hole in an embodiment of a latch-type leg structure of an offshore platform according to the present invention;
FIG. 3 is a schematic cross-sectional view at A-A of FIG. 2;
fig. 4 is a schematic view of a portion of a leg structure at a lifting lug in an embodiment of a latch-type leg structure of an offshore platform according to the present invention.
In the figure: 1. cylindrical pile legs; 10. a pin hole; 11. lifting lugs; 2. reinforcing webs; 20. perforating; 21. build-up welding parts;
3. a sealed housing; 31. an annular sidewall; 32. a cover plate; 4. an elastic washer; 40. an annular oil chamber; 41. a pressure sensor; 5. pile shoe.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, a concrete embodiment 1 of a bolt-type pile leg structure of an offshore platform according to the present invention includes a cylindrical pile leg 1 and a reinforcing web 2, wherein the cylindrical pile leg 1 is provided with a plurality of pin holes 10, the plurality of pin holes 10 are distributed at intervals along an axial direction of the cylindrical pile leg 1, the reinforcing web 2 is fixedly connected to an outer side of the cylindrical pile leg 1, and the reinforcing web 2 is provided with perforations 20 corresponding to the pin holes 10; the inner side of the cylindrical pile leg 1 is fixedly connected with a plurality of sealing shells 3, the plurality of sealing shells 3 are respectively covered outside the corresponding pin holes 10, a plug pin accommodating cavity is formed in the sealing shell 3, and the plug pin accommodating cavity, the pin holes 10 and the through holes 20 are sequentially communicated from inside to outside to form plug-in channels.
The hole edge of the perforation 20 is flush with the hole edge of the pin hole 10, the hole edge of the pin hole 10 protrudes out of the inner side of the sealing shell 3, an elastic gasket 4 is arranged in the sealing shell 3, an annular oil cavity 40 is arranged in the elastic gasket 4, and an oiling interface communicated with the annular oil cavity 40 is arranged on the elastic gasket 4; the elastic washer 4 has a pressurized state and a pressure relief state, and in the pressurized state, the annular oil cavity 40 is filled with hydraulic oil so that the elastic washer 4 expands inwards in the radial direction and radially abuts against the bolt; in the pressure relief state, the hydraulic oil is discharged from the annular oil chamber 40 to cause the elastic washer 4 to contract radially outward and separate from the plug pin.
The bolt type pile leg structure of the offshore platform comprises a cylindrical pile leg 1, a reinforcing web plate 2, a sealing shell 3 and an elastic gasket 4, wherein the reinforcing web plate 2 is fixedly connected to the outer side of the cylindrical pile leg 1, and a pin hole 10 of the cylindrical pile leg 1 corresponds to a through hole 20 of the reinforcing web plate 2; the seal shell 3 is fixedly connected to the inner side of the cylindrical pile leg 1, and the seal shell 3 is covered outside the corresponding pin hole 10. The pin accommodating cavity of the sealing shell 3, the pin hole 10 of the cylindrical pile leg 1 and the through hole 20 of the reinforcing web 2 are sequentially communicated from inside to outside to form an inserting channel, so that a pin of the lifting system can extend into the inserting channel, and the aim of reliably fixing the offshore platform is fulfilled; the sealing shell 3 can prevent external seawater from entering the inside of the cylindrical pile leg 1, and plays a role in separating the inside space and the outside space of the pile leg by watertight.
The hole edges of the perforation 20 are flush with the hole edges of the pin hole 10, the hole edges of the pin hole 10 and the perforation 20 are both protruded out of the inner side of the sealing shell 3, an elastic gasket 4 is installed in the sealing shell 3, an annular oil cavity 40 is arranged in the elastic gasket 4, an oil injection interface is arranged on the elastic gasket 4, and hydraulic oil can be injected into the annular oil cavity 40 or discharged outwards through the oil injection interface; when the bolt is inserted in place, hydraulic oil is injected into the annular oil cavity 40 through the oil injection interface, so that the elastic gasket 4 expands inwards in the radial direction and the inner peripheral wall of the elastic gasket tightly props against the bolt, the elastic gasket 4 can fully support the bolt after being pressurized, the contact area between the bolt and the pile leg structure is increased, the pressure of the bolt directly acting on the cylindrical pile leg 1 is effectively buffered, the condition that structural damage occurs due to small stress area is avoided, and the reliability and safety of the pile leg structure are improved.
In this embodiment, the cylindrical pile leg 1 is a cylindrical structure, the reinforcing web 2 is a long strip, the width section profile of the reinforcing web 2 is arc-shaped, and the reinforcing web 2 is in fit connection with the cylindrical pile leg 1. Wherein, the outer edge of reinforcing web 2 and the outer wall welded connection of cylindric spud leg 1, the hole edge and the outer wall welded connection of cylindric spud leg 1 of perforation 20. As a further preferable scheme, the outer edge of the reinforcing web 2 and the hole edge of the perforation 20 are both provided with chamfer edges, the chamfer edges of the reinforcing web 2 are in surfacing connection with the outer wall of the cylindrical pile leg 1, as shown in fig. 3, a surfacing part 21 is arranged between the outer edge of the reinforcing web 2 and the outer wall of the cylindrical pile leg 1, a surfacing part 21 is arranged between the hole edge of the perforation 20 and the outer wall of the cylindrical pile leg 1, and the connection strength between the reinforcing web 2 and the cylindrical pile leg 1 is improved.
The seal shell 3 comprises an annular side wall 31 and a cover plate 32, the cover plate 32 is fixedly connected with the annular side wall 31, the annular side wall 31 is arranged outside the pin hole 10 in a surrounding mode, and the annular side wall 31 and the pin hole 10 are coaxially arranged. And, the elastic gasket 4 adopts the rubber material to make, and elastic gasket 4 and annular lateral wall 31 unsmooth cooperation, and the contour shape of annular oil pocket 40 is the circle annular that the upper thin thick gradual change was set up down, and the downside portion of elastic gasket 4 corresponds with the thick footpath section of annular oil pocket 40, and the downside portion of elastic gasket 4 is used for radially propping up the bolt when the pressurized state.
The annular oil cavity 40 of the elastic gasket 4 adopts a gradual change design of being thin at the upper part and thick at the lower part, and the lower part of the elastic gasket 4 corresponds to the thick diameter section of the annular oil cavity 40, namely, the thickness of the upper part of the elastic gasket 4 is large, the thickness of the lower part of the elastic gasket 4 is small, and under the condition that the oil pressure in the annular oil cavity 40 is constant, the expansion amount of the lower part of the elastic gasket 4 is large, so that a bolt can be reliably pushed upwards, and the downward pressure generated by the bolt can be dispersed.
And, fixedly be provided with a plurality of floor (not shown in the figure) between annular lateral wall 31 and the inner wall of cylindric spud leg 1, a plurality of floor are radial distribution about the center of seal shell 3, have strengthened the connection reliability between seal shell 3 and the cylindric spud leg 1, ensure can play the effect of reliable buffering atress.
In this embodiment, the inner peripheral wall of the elastic washer 4 is further provided with a positioning groove, in which a pressure sensor 41 is installed, the detection surface of the pressure sensor 41 is flush with the inner peripheral wall of the elastic washer 4, and the pressure sensor 41 is used for detecting the tightening force of the elastic washer 4 on the plug pin in the pressurized state. Correspondingly, the plug-pin type pile leg structure of the offshore platform further comprises an oil circuit system, wherein the oil circuit system is arranged in the cylindrical pile leg 1 and is connected with the oil injection interface of the elastic gasket 4.
In addition, the latch type spud leg structure of the offshore platform further comprises a control system, wherein the control system is electrically connected with the pressure sensor 41 and is used for receiving a pressure signal detected by the pressure sensor 41 so as to control the oil circuit system to stop injecting hydraulic oil into the elastic gasket 4 when the pressure value reaches a set pressure. The control system is utilized to acquire the propping acting force of the elastic gasket 4 on the bolt, and whether the propping acting force reaches the set pressure or not is judged according to the pressure signal detected by the pressure sensor 41, so that the purpose of accurately controlling the oil circuit system is realized. The lower part of the cylindrical pile leg 1 is fixedly provided with a pile shoe 5, the pile shoe 5 is reliably inserted into the seabed, moreover, the upper part of the reinforcing web 2 protrudes out of the upper side of the cylindrical pile leg 1, and two sides of the reinforcing web 2 are fixedly connected with lifting lugs 11, so that the installation operation of the lifting pile leg structure is convenient to implement.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
1. The plug pin type pile leg structure of the offshore platform is characterized by comprising a cylindrical pile leg and a reinforcing web, wherein a plurality of pin holes are formed in the cylindrical pile leg, the pin holes are distributed at intervals along the axial direction of the cylindrical pile leg, the reinforcing web is fixedly connected to the outer side of the cylindrical pile leg, and a through hole corresponding to the pin holes is formed in the reinforcing web;
the inner side of the cylindrical pile leg is fixedly connected with a plurality of sealing shells, the sealing shells are respectively covered outside the corresponding pin holes, a plug pin accommodating cavity is formed in the sealing shells, and the plug pin accommodating cavity, the pin holes and the through holes are sequentially communicated from inside to outside to form plug-in channels;
the perforated hole edge is flush with the hole edge of the pin hole, the hole edge of the pin hole protrudes out of the inner side of the sealing shell, an elastic gasket is arranged in the sealing shell, an annular oil cavity is arranged in the elastic gasket, and an oiling interface communicated with the annular oil cavity is arranged on the elastic gasket;
the elastic gasket is in a pressurized state and a pressure relief state, and hydraulic oil is filled in the annular oil cavity in the pressurized state so that the elastic gasket expands inwards in the radial direction and radially abuts against the bolt; and in a pressure relief state, hydraulic oil is discharged from the annular oil cavity, so that the elastic gasket is contracted outwards in the radial direction and separated from the bolt.
2. The plug-pin spud leg structure of an offshore platform according to claim 1, wherein the cylindrical spud leg is of a cylindrical structure, the reinforcing web is a long strip, the width cross-section profile of the reinforcing web is arc-shaped, and the reinforcing web is in fit connection with the cylindrical spud leg.
3. The latchbolt leg structure of an offshore platform in accordance with claim 2, wherein the outer edge of the reinforcing web is welded to the outer wall of the cylindrical leg and the perforated hole edge is welded to the outer wall of the cylindrical leg.
4. A plug-pin spud leg structure of an offshore platform according to claim 3, characterized in that the outer edge of the reinforcing web and the perforated hole edge are provided with chamfer edges, which are in surfacing connection with the outer wall of the cylindrical spud leg.
5. The plug-pin spud leg structure of an offshore platform according to claim 1, wherein the sealing shell comprises an annular side wall and a cover plate, the cover plate is fixedly connected with the annular side wall, the annular side wall is enclosed outside the pin hole, and the annular side wall and the pin hole are coaxially arranged.
6. The latch leg structure of offshore platform according to claim 5, wherein the elastic washer is made of rubber material, the elastic washer is in concave-convex fit with the annular side wall, the outline shape of the annular oil cavity is a circular ring with upper thin part and lower thick part gradually arranged, the lower part of the elastic washer corresponds to the thick diameter section of the annular oil cavity, and the lower part of the elastic washer is used for radially propping against the latch in the pressurized state.
7. The latch-type spud leg structure of offshore platform according to claim 6, wherein a plurality of ribs are fixedly arranged between the annular side wall and the inner wall of the cylindrical spud leg, and the ribs are radially distributed with respect to the center of the sealing shell.
8. The latch-type spud leg structure of an offshore platform according to claim 1, wherein the inner peripheral wall of the elastic washer is further provided with a positioning groove, a pressure sensor is installed in the positioning groove, a detection surface of the pressure sensor is arranged flush with the inner peripheral wall of the elastic washer, and the pressure sensor is used for detecting a tightening force of the elastic washer on the latch in a pressurized state.
9. The latchbolt leg structure of an offshore platform according to claim 8, further comprising an oil circuit system disposed inside the cylindrical leg and connected to the oil injection port of the elastic washer.
10. The latchbolt leg structure of an offshore platform according to claim 9, further comprising a control system electrically connected to the pressure sensor, the control system being configured to receive a pressure signal detected by the pressure sensor and to control the oil line system to stop injecting hydraulic oil into the elastic washer when the pressure value reaches a set pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210813751.XA CN115012377B (en) | 2022-07-11 | 2022-07-11 | Bolt type pile leg structure of offshore platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210813751.XA CN115012377B (en) | 2022-07-11 | 2022-07-11 | Bolt type pile leg structure of offshore platform |
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| Publication Number | Publication Date |
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| CN115012377A CN115012377A (en) | 2022-09-06 |
| CN115012377B true CN115012377B (en) | 2024-01-23 |
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| CN202210813751.XA Active CN115012377B (en) | 2022-07-11 | 2022-07-11 | Bolt type pile leg structure of offshore platform |
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