CN115012377A - Bolt type pile leg structure of offshore platform - Google Patents
Bolt type pile leg structure of offshore platform Download PDFInfo
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- CN115012377A CN115012377A CN202210813751.XA CN202210813751A CN115012377A CN 115012377 A CN115012377 A CN 115012377A CN 202210813751 A CN202210813751 A CN 202210813751A CN 115012377 A CN115012377 A CN 115012377A
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- 239000003921 oil Substances 0.000 claims abstract description 54
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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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
-
- 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
-
- 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
-
- 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 plate, wherein the cylindrical pile leg is provided with a plurality of pin holes, the reinforcing web plate is fixedly connected to the outer side of the cylindrical pile leg, and the reinforcing web plate is provided with through holes 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 the bolt accommodating cavity, the pin holes and the through holes of the sealing shells are sequentially communicated from inside to outside to form an insertion channel; the edge of the through hole is flush with the edge of the pin hole, the edge of the pin hole protrudes out of the inner side of the sealing shell, an elastic gasket is installed in the sealing shell, and an annular oil cavity is formed in the elastic gasket; the elastic washer has a pressurized state in which the annular oil chamber is filled with hydraulic oil to cause the elastic washer to expand radially inward and radially abut against the pin, effectively cushioning the pressure of the pin directly acting on the tubular leg.
Description
Technical Field
The invention relates to the technical field of pile legs, in particular to a plug pin type pile leg structure of an offshore platform.
Background
In the ocean energy engineering, offshore wind power stations, offshore oil production wells and other engineering are all based on offshore platforms. Offshore platforms usually employ a pin lift system for the lifting operation, and the reliability of the leg structure is of paramount importance.
Because the gravity of the offshore platform acts on the pin holes of the pile legs through the pins of the lifting system, the load borne by the pin holes of the pile legs is large, and the local structure of the pile legs is easily damaged due to long-time stress. Then, Chinese patent application with application publication number CN108385643A and application publication number 2018.08.10 discloses a platform lifting hydraulic pin type pile leg, and particularly discloses that the platform lifting hydraulic pin type pile leg comprises a cylinder and a strip-shaped flitch; the strip-shaped flitch is provided with bolt holes which are arranged at intervals and correspond to the bolt holes on the cylinder body one by one; the strip-shaped pasting plate is welded and fixed with the cylinder body. The pile leg reinforcing structure is reinforced by a mode of penetrating the length of the whole pile leg and provided with the flitch, the flitch is attached to the outer side of the pile leg, and circular holes which are concentric and have the same diameter are formed in the corresponding positions of 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 platform lifting hydraulic bolt type pile leg in the prior art utilizes the strip-shaped flitch to strengthen the barrel, the contact area between the bolt and the pin hole is still small, the pile leg can not 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, an object of the present invention is to provide a plug pin type leg structure for offshore platforms, so as to solve the problems that the contact area between the plug pin and the pin hole is still small, the leg cannot bear the platform for a long time, and the reliability and safety of the 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 plate, wherein a plurality of pin holes are formed in the cylindrical pile leg and are distributed at intervals along the axis direction of the cylindrical pile leg, the reinforcing web plate is fixedly connected to the outer side of the cylindrical pile leg, and through holes corresponding to the pin holes are formed in the reinforcing web plate;
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 each sealing shell, and the plug pin accommodating cavity, the pin holes and the through holes are sequentially communicated from inside to outside to form a plug-in channel;
the hole edge of the through hole 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 installed in the sealing shell, an annular oil cavity is formed in the elastic gasket, and an oil filling interface communicated with the annular oil cavity is arranged on the elastic gasket;
the elastic gasket has a pressurizing state and a pressure relief state, and in the pressurizing state, hydraulic oil is filled in the annular oil cavity so that the elastic gasket expands inwards in the radial direction and abuts against the bolt in the radial direction; and in a pressure relief state, the annular oil cavity is drained of hydraulic oil, so that the elastic gasket is contracted outwards in the radial direction and is separated from the bolt.
Further, the cylindric spud leg is cylindrical tubular structure, it is the rectangular board to strengthen the web, the width cross-section profile of strengthening the web is the arc, strengthen the web with the laminating of cylindric spud leg is connected.
Furthermore, the outer edge of the reinforcing web is connected with the outer wall of the cylindrical pile leg in a welding mode, and the perforated hole edge is connected with the outer wall of the cylindrical pile leg in a welding mode.
Further, strengthen the web the outward flange with fenestrate hole edge all is provided with the chamfer limit, strengthen the web the chamfer limit with the outer wall build-up welding of cylindric spud leg is connected.
Furthermore, the seal shell includes annular side wall and apron, the apron with annular side wall fixed connection, the annular side wall encloses to be located the outside of pinhole, just the annular side wall with the pinhole is coaxial arrangement.
Further, the elastic washer is made of rubber materials, the elastic washer is matched with the annular side wall in a concave-convex mode, the outline shape of the annular oil cavity is a ring shape which is gradually changed in shape from top to bottom, the lower side portion of the elastic washer corresponds to the large-diameter section of the annular oil cavity, and the lower side portion of the elastic washer is used for radially jacking the bolt in a pressurizing state.
Furthermore, a plurality of rib plates are fixedly arranged between the annular side wall and the inner wall of the cylindrical pile leg, and the plurality of rib plates are radially distributed relative to the center of the sealing shell.
Further, the internal perisporium of elastic washer still is provided with the constant head tank, install pressure sensor in the constant head tank, pressure sensor's detection face with elastic washer's internal perisporium parallel and level is arranged, pressure sensor is used for detecting the pressurization state elastic washer is right the tight power in top that the bolt produced.
Furthermore, the oil-way system is arranged inside the cylindrical pile leg and is connected with the oil filling connector of the elastic washer.
The control system is electrically connected with the pressure sensor and used for receiving a pressure signal detected by the pressure sensor and controlling the oil way system to stop injecting hydraulic oil into the elastic gasket when a pressure value reaches a set pressure.
Has the advantages that: the bolt type pile leg structure of the offshore platform comprises a cylindrical pile leg, a reinforcing web plate, a sealing shell and an elastic washer, wherein the reinforcing web plate is fixedly connected to the outer side of the cylindrical pile leg, and a pin hole of the cylindrical pile leg corresponds to a through hole of the reinforcing web plate; the sealing shell is fixedly connected to the inner side of the cylindrical pile leg, and the sealing shell covers the outer portion of the corresponding pin hole. The bolt accommodating cavity of the sealing shell, the pin hole of the cylindrical pile leg and the through hole of the reinforcing web plate are sequentially communicated from inside to outside to form an insertion channel, so that a bolt of the lifting system can extend into the insertion channel, and the aim of reliably fixing the offshore platform is fulfilled; the sealed shell can prevent external sea water from entering the inside of the cylindrical pile leg, and plays a role in watertight separation of the inner space and the outer space of the pile leg.
The edge of the through hole is flush with the edge of the pin hole, the pin hole and the edge of the through hole both protrude out of the inner side of the sealing shell, an elastic gasket is installed in the sealing shell, an annular oil cavity is formed in the elastic gasket, the elastic gasket is provided with an oil filling connector, and hydraulic oil can be filled into the annular oil cavity or can be supplied to the annular oil cavity to be discharged outwards through the oil filling connector. When the bolt is inserted in place, hydraulic oil is injected into the annular oil cavity through the oil injection interface, the elastic washer expands inwards in the radial direction and the inner peripheral wall of the elastic washer tightly supports the bolt, the elastic washer can fully support the bolt after pressurization, 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 situation of structural damage caused by small stress area is avoided, and the reliability and the safety of the pile leg structure are improved.
Drawings
Fig. 1 is a schematic front view of a pin leg structure of an offshore platform in an embodiment of the pin leg structure of an offshore platform according to the present invention;
fig. 2 is a partial schematic view of a leg structure at a pin hole in an embodiment of the pin leg structure of the offshore platform of the present invention;
FIG. 3 is a schematic cross-sectional view taken at A-A of FIG. 2;
fig. 4 is a partial schematic view of a leg structure at a lifting lug in an embodiment of the pin leg structure of the offshore platform of the present invention.
In the figure: 1. a cylindrical leg; 10. a pin hole; 11. lifting lugs; 2. a reinforcing web; 20. perforating; 21. surfacing parts;
3. sealing the shell; 31. an annular sidewall; 32. a cover plate; 4. an elastic washer; 40. an annular oil chamber; 41. a pressure sensor; 5. and (4) a pile shoe.
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 embodiment 1 of the latch type leg structure of the offshore platform of the present invention, as shown in fig. 1 to 4, the latch type leg structure of the offshore platform includes a cylindrical leg 1 and a reinforcing web 2, the cylindrical 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 leg 1, the reinforcing web 2 is fixedly connected to an outer side of the cylindrical leg 1, and the reinforcing web 2 is provided with through holes 20 corresponding to the pin holes 10; still a plurality of sealed shells 3 of fixedly connected with in the inboard of cylindric spud leg 1, a plurality of sealed shells 3 cover respectively and locate the outside of corresponding pinhole 10, and sealed shell 3's inside has a bolt holding chamber, and bolt holding chamber, pinhole 10 and perforation 20 link up formation cartridge passageway from inside to outside in proper order.
The hole edge of the through hole 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 installed in the sealing shell 3, an annular oil cavity 40 is arranged inside the elastic gasket 4, and an oil filling port communicated with the annular oil cavity 40 is arranged on the elastic gasket 4; the elastic gasket 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 gasket 4 expands inwards in the radial direction and supports against the bolt in the radial direction; in the relieved condition, the annular oil chamber 40 is drained of hydraulic oil so that the resilient gasket 4 contracts radially outwardly and disengages the spigot.
The bolt type pile leg structure of the offshore platform comprises a cylindrical pile leg 1, a reinforcing web 2, a sealing shell 3 and an elastic washer 4, wherein the reinforcing web 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 2; the sealing shell 3 is fixedly connected to the inner side of the cylindrical spud leg 1, and the sealing shell 3 covers the outer part of the corresponding pin hole 10. The bolt 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 insertion channel, so that a bolt of a lifting system can extend into the insertion 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 watertight separation of the inner space and the outer space of the pile leg.
The hole edge of the through hole 20 is flush with the hole edge of the pin hole 10, the pin hole 10 and the hole edge of the through hole 20 both protrude 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 inside the elastic gasket 4, the elastic gasket 4 is provided with an oil filling interface, and hydraulic oil can be filled into the annular oil cavity 40 or can be discharged outwards through the oil filling 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 washer 4 expands inwards in the radial direction and the inner peripheral wall of the elastic washer abuts against the bolt, the elastic washer 4 can fully support the bolt after pressurization, the contact area between the bolt and a pile leg structure is increased, the pressure of the bolt directly acting on the cylindrical pile leg 1 is effectively buffered, the condition of structural damage caused by small stress area is avoided, and the reliability and the safety of the pile leg structure are improved.
In this embodiment, cylindric spud leg 1 is cylindrical tubular structure, strengthens web 2 for the rectangular board, strengthens the width cross-sectional profile of web 2 and is the arc, strengthens web 2 and is connected with the laminating of cylindric spud leg 1. The outer edge of the reinforcing web 2 is welded to the outer wall of the cylindrical leg 1, and the hole edge of the through hole 20 is welded to the outer wall of the cylindrical leg 1. As a further preferable mode, the outer edge of the reinforcing web 2 and the hole edge of the through hole 20 are both provided with chamfered edges, and the chamfered edges of the reinforcing web 2 are connected with the outer wall of the cylindrical leg 1 by build-up welding, as shown in fig. 3, a build-up welding part 21 is provided between the outer edge of the reinforcing web 2 and the outer wall of the cylindrical leg 1, and a build-up welding part 21 is provided between the hole edge of the through hole 20 and the outer wall of the cylindrical leg 1, so that the connection strength between the reinforcing web 2 and the cylindrical leg 1 is improved.
The sealing shell 3 includes an annular sidewall 31 and a cover plate 32, the cover plate 32 is fixedly connected to the annular sidewall 31, the annular sidewall 31 surrounds the pin hole 10, and the annular sidewall 31 and the pin hole 10 are coaxially arranged. And, the elastic washer 4 is made of rubber material, the elastic washer 4 is in concave-convex fit with the annular side wall 31, the outline shape of the annular oil chamber 40 is a ring shape with the upper part being thin and the lower part being thick and gradually changing, the lower part of the elastic washer 4 corresponds to the thick diameter section of the annular oil chamber 40, and the lower part of the elastic washer 4 is used for radially jacking the bolt in a pressurizing state.
The annular oil chamber 40 of the elastic gasket 4 is designed in a gradual change mode with a thin upper part and a thick lower part, and the lower part of the elastic gasket 4 corresponds to the thick diameter section of the annular oil chamber 40, that is, 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 chamber 40 is constant, the expansion amount of the lower part of the elastic gasket 4 is large, so that the bolt can be reliably pushed upwards, and the downward pressure generated by the bolt can be dispersed.
Furthermore, a plurality of ribs (not shown in the figure) are fixedly arranged between the annular side wall 31 and the inner wall of the cylindrical spud leg 1, and the plurality of ribs are radially distributed about the center of the sealing shell 3, so that the connection reliability between the sealing shell 3 and the cylindrical spud leg 1 is enhanced, and the effect of reliable buffering stress is ensured.
In the present embodiment, the inner peripheral wall of the elastic washer 4 is further provided with a positioning groove in which a pressure sensor 41 is mounted, a detection surface of the pressure sensor 41 is arranged 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 a pressurized state. Correspondingly, the bolt type pile leg structure of the offshore platform further comprises an oil way system, the oil way system is arranged inside the cylindrical pile leg 1, and the oil way system is connected with an oil filling connector of the elastic washer 4.
In addition, the bolt type pile leg structure of the offshore platform further comprises a control system, the control system is electrically connected with the pressure sensor 41, and the control system is used for receiving a pressure signal detected by the pressure sensor 41 so as to control the oil path system to stop injecting hydraulic oil into the elastic washer 4 when a pressure value reaches a set pressure. The control system is used for acquiring the jacking acting force of the elastic gasket 4 on the bolt, and whether the jacking acting force reaches the set pressure or not is judged according to the pressure signal detected by the pressure sensor 41, so that the aim of accurately controlling the oil circuit system is fulfilled. 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, the upper part of the reinforcing web 2 protrudes out of the upper side of the cylindrical pile leg 1, and lifting lugs 11 are fixedly connected to the two sides of the reinforcing web 2, so that the installation operation of lifting the pile leg structure is conveniently implemented.
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 plug pin type pile leg structure of an offshore platform is characterized by comprising a cylindrical pile leg and a reinforcing web plate, wherein the cylindrical pile leg is provided with a plurality of pin holes which are distributed at intervals along the axial direction of the cylindrical pile leg, the reinforcing web plate is fixedly connected to the outer side of the cylindrical pile leg, and the reinforcing web plate is provided with through holes 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 each sealing shell, and the plug pin accommodating cavity, the pin holes and the through holes are sequentially communicated from inside to outside to form a plug-in channel;
the hole edge of the through hole 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 installed in the sealing shell, an annular oil cavity is formed in the elastic gasket, and an oil filling interface communicated with the annular oil cavity is arranged on the elastic gasket;
the elastic gasket has a pressurizing state and a pressure relief state, and in the pressurizing state, hydraulic oil is filled in the annular oil cavity so that the elastic gasket expands inwards in the radial direction and abuts against the bolt in the radial direction; and in a pressure relief state, the annular oil cavity is drained of hydraulic oil, so that the elastic gasket is contracted outwards in the radial direction and is separated from the bolt.
2. The plug pin leg structure of an offshore platform of claim 1, wherein the cylindrical leg is a cylindrical tubular structure, the reinforcing web is a strip, the reinforcing web has an arc-shaped width cross-sectional profile, and the reinforcing web is attached to the cylindrical leg.
3. The latch leg structure of an offshore platform defined in claim 2, wherein the outer edge of the reinforcement web is welded to the outer wall of the tubular leg and the perforated hole is welded to the outer wall of the tubular leg.
4. The plug pin type pile leg structure of an offshore platform according to claim 3, wherein the outer edge of the reinforcing web and the edge of the perforated hole are provided with chamfered edges, and the chamfered edges of the reinforcing web are connected with the outer wall of the cylindrical pile leg through overlaying welding.
5. The pincolumn leg structure of claim 1, wherein the seal housing comprises an annular sidewall and a cover plate, the cover plate is fixedly connected to the annular sidewall, the annular sidewall surrounds the pin hole, and the annular sidewall is coaxially disposed with the pin hole.
6. The pin leg structure of an 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 annular oil chamber is in a shape of a ring with gradually changing upper and lower thickness, the lower part of the elastic washer corresponds to the thick section of the annular oil chamber, and the lower part of the elastic washer is used for radially pressing the pin in a pressurized state.
7. The latch leg structure of an offshore platform defined in claim 6, wherein a plurality of ribs are fixedly disposed between the annular sidewall and the inner wall of the tubular leg, the plurality of ribs being radially disposed about a center of the seal housing.
8. The spud leg structure according to claim 1, wherein the elastic washer further comprises a positioning groove formed in an inner peripheral wall thereof, and a pressure sensor is mounted in the positioning groove, and a detection surface of the pressure sensor is flush with the inner peripheral wall of the elastic washer, and the pressure sensor is configured to detect a tightening force of the elastic washer on the spud in a pressurized state.
9. The pinjack leg structure of claim 8, further comprising an oil system disposed inside the cylindrical leg, the oil system being connected to the oil filler point of the elastomeric washer.
10. The pinlock type pile 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 control the oil line system to stop injecting hydraulic oil into the elastic washer when a 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 true CN115012377A (en) | 2022-09-06 |
| CN115012377B 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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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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|---|---|
| CN115012377B (en) | 2024-01-23 |
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