CN111560936B - Umbrella-shaped self-opening type ocean engineering pile pipe packer - Google Patents
Umbrella-shaped self-opening type ocean engineering pile pipe packer Download PDFInfo
- Publication number
- CN111560936B CN111560936B CN202010667744.4A CN202010667744A CN111560936B CN 111560936 B CN111560936 B CN 111560936B CN 202010667744 A CN202010667744 A CN 202010667744A CN 111560936 B CN111560936 B CN 111560936B
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- China
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- sealing
- support plate
- fixing sleeve
- sealing support
- umbrella
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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
- E02B17/0013—Tube closures for releasable sealing hollow tubes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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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
Abstract
The invention discloses an umbrella-shaped self-opening type marine engineering pile pipe packer which comprises a hollow coupling fixing sleeve, wherein a plurality of sealing support plates are installed on the periphery of the inner wall of the coupling fixing sleeve through hinges, a sealing layer is fixedly arranged on the periphery of the inner wall of the coupling fixing sleeve and extends to the surface of each sealing support plate through the upper part of each hinge, each sealing layer is fixed to the surface of each sealing support plate, a pouring cavity is formed by each sealing layer on the surface of each sealing support plate and each sealing layer on the surface of the inner wall of the coupling fixing sleeve, a cylindrical stroke switch is vertically installed in the center of the coupling fixing sleeve, and each sealing support plate is. Compared with the prior art, the invention has the following advantages: the polyurethane layer does not have any damage, and the stake pipe does not have any impact damage and destruction to the packer, opens automatically, and safe and reliable need not external control operation, does not receive external influence, and elastic adjustment ensures that sealed backup pad is close to the stake pipe outer wall all the time, and is sealed firm reliable.
Description
Technical Field
The invention relates to an offshore oil production operation device, in particular to an umbrella-shaped self-opening type ocean engineering pile pipe packer.
Background
The stake pipe packer wide application is in the abominable engineering field in environment such as offshore oil production operation platform, wind power generation platform, and current domestic and foreign technical scheme all adopts cyclic annular cavity bottle stopper formula stake pipe packer, and this kind of traditional packer structure is: the outmost layer is a circular steel ring, the excircle of the circular steel ring is welded on the inner wall of the jacket sleeve, polyurethane with a central aperture is cast and fixed on the inner layer of the steel ring, the inner diameter of the central aperture is slightly smaller than the outer diameter of the pile pipe, and the pile pipe and the inner hole of the packer are in interference fit.
The currently used packers have the following disadvantages: 1. the polyurethane layer is easily ignited or melted and damaged by high temperature when the packer is fixed by welding. 2. In the process of fixing and piling the pile position, the polyurethane layer is inevitably subjected to friction damage or the whole polyurethane layer falls off under the action of strong vibration force and impact force of the pile pipe, the sealing effect is seriously influenced, and quality accidents are caused.
The disadvantages are caused by: the whole installation welding of packer damages polyurethane layer easily, and packer centre bore and stake pipe clearance are little, damage the polyurethane seal when leading to stake pipe shock vibration to descend.
Disclosure of Invention
The invention aims to analyze the defects of the existing packers at home and abroad by summarizing the construction experience of offshore pile driving sites for years, find out the key of problems and conceive and design a novel packer, namely an umbrella-shaped self-starting type ocean engineering and wind power generation pile pipe packer, which is called an umbrella-shaped self-starting type packer for short.
The technical scheme is as follows: an umbrella-shaped self-opening type marine engineering pile pipe packer comprises a hollow connecting fixing sleeve, wherein a plurality of sealing support plates are installed on the periphery of the inner wall of the connecting fixing sleeve through hinges, a sealing layer is fixedly arranged on the periphery of the inner wall of the connecting fixing sleeve and extends to the surface of each sealing support plate through the upper portion of each hinge, each sealing layer is fixed to the surface of each sealing support plate, a pouring cavity is formed by each sealing layer on the surface of each sealing support plate and each sealing layer on the surface of the inner wall of the connecting fixing sleeve, a cylindrical stroke switch is vertically installed in the center of the connecting fixing sleeve, and each sealing support plate is vertically pressed on the periphery of the corresponding stroke switch.
Further, the hinge comprises a hinged support, a pin and a torsion spring, wherein a first hinged support is arranged on the inner wall of the connecting fixing sleeve, a second hinged support is arranged on the lower section of the sealing support plate, the first hinged support and the second hinged support are rotatably connected through the pin, the torsion spring is arranged around the pin, one end of the torsion spring is pressed on the connecting fixing sleeve, and the other end of the torsion spring is pressed on the sealing support plate. Further, in the present invention,
further, the number of the first hinged supports is at least two, the number of the second hinged supports is at least two, and the springs are arranged in the middle of the hinged supports.
Furthermore, the two sides of the sealing support plates are provided with hauling ropes, and each support plate is connected through the hauling ropes.
Furthermore, the hauling rope is a steel wire rope or a chain or a nylon rope.
Furthermore, 16 sealing support plates are uniformly and circumferentially arranged on the inner wall of the connecting fixing sleeve, arc-shaped grooves are formed in the upper portions of the sealing support plates, and when the travel switch is taken down, all the sealing support plates are gathered towards the center of the connecting fixing sleeve, so that each arc-shaped groove is combined to form a hollow cylindrical cavity.
Furthermore, the travel switch is provided with an axial through hole.
Furthermore, the top of the connecting and fixing sleeve is provided with an inner chamfer, and the sealing layer extends to the upper part of the inner chamfer.
Further, the sealing layer is wire-clamping rubber, and the sealing layer is adhered or fixed on the inner wall surface of the connecting fixing sleeve through a bolt after the sealing layer is perforated.
Compared with the prior art, the invention has the following advantages:
1) the outer circle of the packer-the connecting fixed sleeve is firstly welded and fixed in the conduit frame sleeve, and other parts are respectively assembled, so that the polyurethane layer has no damage.
2) When the pile pipe descends for the first time, the clearance between the pile pipe and the packer is large enough, the pile pipe does not have any impact damage and damage to the packer, and the packer is intact.
3) The automatic opening is safe and reliable, does not need external control operation, and is not influenced by the outside.
4) The umbrella-shaped structure is designed, the concept is unique, and the layout is reasonable. And elastic adjustment is carried out to ensure that the sealing support plate always abuts against the outer wall of the pile pipe.
5) The annular sealing pool ensures that the sealing support plate is tightly pressed on the pile pipe under the action of mud pressure in the process of pouring cement slurry, and the sealing is firm and reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of the present invention before the stake push down travel switch;
FIG. 2 is a front view, half-sectioned, of the pile tube before the push-down travel switch of the present invention;
FIG. 3 is a top view of the sealing support plate in close engagement with the pile tube after the travel switch is pushed down by the pile tube in accordance with the present invention;
FIG. 4 is a front view, partly in section, of the present invention after the travel switch is pushed down from the pile tube, with the sealing support plate in close contact with the pile tube;
FIG. 5 is a front view of the seal support plate of the present invention;
FIG. 6 is a left side view of the seal support plate of the present invention;
FIG. 7 is a top view of the seal support plate of the present invention mounted on the inner wall of the coupling retaining sleeve;
the device comprises a pile pipe 1, a pile pipe 2, a jacket sleeve 3, a connecting and fixing sleeve 4, a hinge 41, a first hinged support 42, a second hinged support 43, a pin 44, a torsion spring 5, a sealing support plate 6, a sealing layer 7, a travel switch 8, a traction rope 9 and a pouring cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1-7, an umbrella-shaped self-opening type marine engineering pile pipe packer comprises a hollow coupling fixing sleeve 3, a plurality of sealing support plates 5 are installed around the inner wall of the coupling fixing sleeve 3 through hinges 4, a sealing layer 6 is fixedly arranged around the inner wall of the coupling fixing sleeve 3, the sealing layer 6 extends to the surface of the sealing support plate 5 through the upper portion of the hinge 4, the sealing layer 6 is fixed to the surface of the sealing support plate 5, the sealing layer 6 on the surface of the sealing support plate 5 and the sealing layer 6 on the surface of the inner wall of the coupling fixing sleeve 3 form a pouring cavity 9, a cylindrical stroke switch 7 is vertically installed at the center position of the coupling fixing sleeve 3, and the sealing support plate 5 is vertically pressed around the stroke switch 7. The sealing support plate 5 can be pressed to gather towards the center of the travel switch 7 by the elasticity of the sealing layer 6, so that the sealing support plate 5 is tightly attached to the outer wall of the travel switch 7, the travel switch 7 is fixed by the travel switch, when the travel switch 7 is pushed down by the pile tube 1, the travel switch 7 is separated from the fixation of the sealing support plate 5, the sealing support plate 5 is pressed on the periphery of the pile tube 1, each sealing support plate 5 inclines towards the pile tube 1 because the outer diameter of the pile tube 1 is smaller than that of the travel switch 7, and at the moment, the sealing layer 6 on the surface of the sealing support plate 5 and the sealing layer 6 on the surface of the inner wall of the.
The hinge 4 comprises a first hinge support 41, a second hinge support 42, a pin 43 and a torsion spring 44, wherein the first hinge support 41 is arranged around the inner wall of the connecting fixing sleeve 3, the second hinge support 42 is arranged at the lower section of the sealing support plate 5, the first hinge support 41 and the second hinge support 42 are inserted together through the pin 43 to form a rotary connection, the torsion spring 44 is arranged around the pin 43, and one end of the torsion spring 44 is pressed on the connecting fixing sleeve 3 while the other end is pressed on the sealing support plate 5. The hinge 4 with the torsion spring 44 is used to make the sealing support plate 5 and the pile pipe 1 fit more tightly, and when the travel switch 7 is separated, the speed of the sealing support plate 5 gathering to the pile pipe 1 is quicker.
At least two first hinge supports 41, at least two second hinge supports 42 and a torsion spring 44 are arranged in the middle of the hinge supports. The multiple hinge mounts reduce wobble and deflection of the seal support plate 5.
The traction ropes 8 are arranged on two sides of the sealing support plate 5, each sealing support plate 5 is connected with each other through the traction ropes 8, and the traction ropes 8 are used for ensuring that the movable end of each sealing support plate 5 is tightly attached to the pile pipe 1 and cannot deviate.
The hauling rope 8 is a steel wire rope or a chain or a nylon rope. Other flexible cords having tenacity may also be used.
The number of the sealing support plates 5 is 16, the sealing support plates are uniformly and circumferentially arranged on the inner wall of the connecting fixed sleeve 3, arc-shaped grooves are formed in the upper portion of each sealing support plate 5, and when the travel switch 7 is taken down, all the sealing support plates 5 are gathered towards the center of the connecting fixed sleeve 3, so that each arc-shaped groove is combined to form a hollow cylindrical cavity. The arc-shaped groove is tightly attached to the pile pipe 1, so that the pouring cavity 9 is sealed more tightly.
The travel switch 7 is provided with an axial through hole. The through holes are arranged to reduce resistance of underwater sundries and the like when the jacket sleeve 2 at the outermost layer is installed, and external resistance and damage are reduced. The outer diameter of the travel switch 7 is larger than the outer diameter of the pile pipe 1, and the inner diameter of the through hole is smaller than the inner diameter of the pile pipe 1.
The top of the connecting and fixing sleeve 3 is provided with an inner chamfer, and the sealing layer 6 extends to the upper part of the inner chamfer. The inner chamfer can play a role in guiding when the pile tube 1 pushes down the travel switch 7.
The sealing layer 6 is made of wire-clamping rubber, and the sealing layer 6 is adhered or fixed on the inner wall surface of the connecting and fixing sleeve 3 through bolts after the sealing layer 6 is perforated. The load-bearing strength of the rubber with the wire is high.
The working principle is as follows: firstly, the outer wall of the connecting and fixing sleeve 3 is fixedly connected with the inner wall of the jacket sleeve 2 in a welding mode, before impact piling, the sealing layer 6 on the sealing support plate 5 is tightly attached to the sealing layer 6 on the inner wall of the connecting and fixing sleeve 3, and the travel switch 7 presses all the sealing support plates 5 to be locked and fixed. During impact pile driving construction, the stroke switch 7 is opened by touching in the descending process of the pile pipe 1, the sealing support plate 5 is opened under the elastic force action of the sealing layer 6 and the torsion spring 44 to realize opening of the umbrella-shaped support, the sealing support plate 5 is always in close fit with the outer wall of the pile pipe 1 under the elastic force action in the pile driving process, the impact pile driving is finished, all parts are in a static state, the annular sealing pouring cavity 9 is formed between the jacket sleeve 2 and the pile pipe 1, cement slurry is poured into the jacket sleeve 2 from the upper port of the jacket sleeve 2 in batches along the inner wall of the jacket sleeve 2, and sealing pouring fixation between the jacket sleeve 2 and the pile pipe 1 is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides an umbelliform self-opening formula ocean engineering stake pipe packer which characterized in that: the device comprises a connecting and fixing sleeve (3), wherein a plurality of sealing support plates (5) are arranged on the periphery of the inner wall of the connecting and fixing sleeve (3) through hinges (4), a sealing layer (6) is fixedly arranged on the periphery of the inner wall of the connecting and fixing sleeve (3), the sealing layer (6) extends to the surface of the sealing support plate (5) through the upper portion of the hinges (4), the sealing layer (6) is fixed on the surface of the sealing support plate (5), the sealing layer (6) on the surface of the sealing support plate (5) and the sealing layer (6) on the surface of the inner wall of the connecting and fixing sleeve (3) form a pouring cavity (9), a cylindrical travel switch (7) is vertically arranged at the center of the connecting and fixing sleeve (3), and the sealing support plate (5) is vertically pressed on the periphery of the travel switch.
2. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 1, wherein: the hinge (4) comprises a first hinge support (41), a second hinge support (42), a pin (43) and a torsion spring (44), wherein the first hinge support (41) is arranged around the inner wall of the connecting fixed sleeve (3), the second hinge support (42) is arranged at the lower section of the sealing support plate (5), the first hinge support (41) and the second hinge support (42) are inserted together through the pin (43) to form rotary connection, the torsion spring (44) is arranged around the pin (43), one end of the torsion spring (44) is pressed on the connecting fixed sleeve (3), and the other end of the torsion spring is pressed on the sealing support plate (5).
3. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 2, wherein: the number of the first hinged supports (41) is at least two, the number of the second hinged supports (42) is at least two, and the torsion spring (44) is arranged in the middle of the hinged supports.
4. The umbrella-shaped self-opening marine engineering pile pipe packer as claimed in claim 1 or 2, wherein: the sealing support plate is characterized in that traction ropes (8) are arranged on two sides of the sealing support plate (5), and each sealing support plate (5) is connected with each other through the traction ropes (8).
5. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 4, wherein: the traction rope (8) is a steel wire rope or a chain or a nylon rope.
6. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 1, wherein: the number of the sealing support plates (5) is 16, the sealing support plates are uniformly and circumferentially arranged on the inner wall of the connecting fixed sleeve (3), arc-shaped grooves are formed in the upper portion of each sealing support plate (5), and when the travel switch (7) is taken down, all the sealing support plates (5) are gathered towards the center of the connecting fixed sleeve (3), so that each arc-shaped groove is combined to form a hollow cylindrical cavity.
7. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 1, wherein: the travel switch (7) is provided with an axial through hole.
8. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 1, wherein: the top of the connecting and fixing sleeve (3) is provided with an inner chamfer, and the sealing layer (6) extends to the upper part of the inner chamfer.
9. The umbrella-shaped self-opening marine engineering pile pipe packer of claim 1, wherein: the sealing layer (6) is made of cord fabric rubber, and the sealing layer (6) is adhered or is fixed on the inner wall surface of the connecting and fixing sleeve (3) through bolts after the sealing layer (6) is perforated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010667744.4A CN111560936B (en) | 2020-07-13 | 2020-07-13 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010667744.4A CN111560936B (en) | 2020-07-13 | 2020-07-13 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
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| Publication Number | Publication Date |
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| CN111560936A CN111560936A (en) | 2020-08-21 |
| CN111560936B true CN111560936B (en) | 2020-09-25 |
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| CN202010667744.4A Active CN111560936B (en) | 2020-07-13 | 2020-07-13 | Umbrella-shaped self-opening type ocean engineering pile pipe packer |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2672016A1 (en) * | 2012-06-04 | 2013-12-11 | RWE Innogy GmbH | Grout seal and method to grout an annular space between two foundation members of an offshore structure |
| CN104947676A (en) * | 2015-06-29 | 2015-09-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Offshore grouting leakage preventing structure and method |
| CN204825949U (en) * | 2015-05-31 | 2015-12-02 | 中国电建集团华东勘测设计研究院有限公司 | Marine fan basis connection structure of pipe posture of driving piles in advance |
| CN206829113U (en) * | 2017-06-29 | 2018-01-02 | 衡橡科技股份有限公司 | A kind of self-closed type packer of dual fail-safe |
| CN108708686A (en) * | 2018-08-21 | 2018-10-26 | 天津熙盛科技发展有限公司 | A kind of passive type has the underwater packer of diminution gap function |
| CN208717896U (en) * | 2018-07-31 | 2019-04-09 | 东营华晏石油技术有限公司 | A kind of ocean engineering self-closing pile pipe packer |
| CN110747885A (en) * | 2019-10-30 | 2020-02-04 | 中铁大桥勘测设计院集团有限公司 | Packer and foundation pile structure |
| CN210151696U (en) * | 2019-06-06 | 2020-03-17 | 衡橡科技股份有限公司 | Tower packer for packing conduit frame cement paste |
-
2020
- 2020-07-13 CN CN202010667744.4A patent/CN111560936B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2672016A1 (en) * | 2012-06-04 | 2013-12-11 | RWE Innogy GmbH | Grout seal and method to grout an annular space between two foundation members of an offshore structure |
| CN204825949U (en) * | 2015-05-31 | 2015-12-02 | 中国电建集团华东勘测设计研究院有限公司 | Marine fan basis connection structure of pipe posture of driving piles in advance |
| CN104947676A (en) * | 2015-06-29 | 2015-09-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Offshore grouting leakage preventing structure and method |
| CN206829113U (en) * | 2017-06-29 | 2018-01-02 | 衡橡科技股份有限公司 | A kind of self-closed type packer of dual fail-safe |
| CN208717896U (en) * | 2018-07-31 | 2019-04-09 | 东营华晏石油技术有限公司 | A kind of ocean engineering self-closing pile pipe packer |
| CN108708686A (en) * | 2018-08-21 | 2018-10-26 | 天津熙盛科技发展有限公司 | A kind of passive type has the underwater packer of diminution gap function |
| CN210151696U (en) * | 2019-06-06 | 2020-03-17 | 衡橡科技股份有限公司 | Tower packer for packing conduit frame cement paste |
| CN110747885A (en) * | 2019-10-30 | 2020-02-04 | 中铁大桥勘测设计院集团有限公司 | Packer and foundation pile structure |
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| CN111560936A (en) | 2020-08-21 |
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