CN112095573A - Method for driving pile legs to lift and descend by four side cylinders of giant offshore wind turbine installation platform - Google Patents

Method for driving pile legs to lift and descend by four side cylinders of giant offshore wind turbine installation platform Download PDF

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Publication number
CN112095573A
CN112095573A CN202010861191.6A CN202010861191A CN112095573A CN 112095573 A CN112095573 A CN 112095573A CN 202010861191 A CN202010861191 A CN 202010861191A CN 112095573 A CN112095573 A CN 112095573A
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hydraulic cylinder
pin
lifting
cylinder lifting
positioning
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CN112095573B (en
Inventor
张永康
吴清源
仇明
高航
何炎平
王振刚
霍小剑
郑和辉
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Guangdong University of Technology
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Guangdong University of Technology
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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B17/00Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B17/00Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0809Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/25Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/727Offshore wind turbines
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a method for driving pile legs to lift and descend by four side cylinders of a giant offshore wind turbine installation platform, which comprises the following steps: changing the pin hole distribution of the pile leg: the left pin hole or the right pin hole is distributed in a staggered mode with the front pin hole or the rear pin hole, the distance between every two adjacent holes in each side is 2L, and the distance between the front pin hole or the rear pin hole and the left pin hole or the right pin hole in the axial direction of the pile leg is L; positioning by positioning pins on four sides; starting the four side cylinders simultaneously; the left positioning pin and the right positioning pin are inserted into the next jack, and the cylinders on the four sides are lifted simultaneously; the front and rear positioning pins are pulled out, and the left and right hydraulic cylinders continue to work; the front positioning pin and the rear positioning pin are inserted into the next jack, and the cylinders on the four sides are lifted simultaneously; and repeating the steps S4 to S7 until the pile body reaches the required lifting height. By adopting the method for driving the pile leg to lift by the four-side cylinder, the pitch difference of the pin holes is fully utilized as a stroke overlapping area, and the overlapping stroke does not need to be separately distinguished by a control part additionally, so that the control process is simplified, and the pile leg is more stably moved, and is safer and more reliable.

Description

Method for driving pile legs to lift and descend by four side cylinders of giant offshore wind turbine installation platform
Technical Field
The invention relates to the technical field of marine equipment, in particular to a method for driving pile legs to lift and descend by four side cylinders of a giant offshore wind turbine installation platform.
Background
Offshore wind power as clean energy is highly valued and vigorously developed by countries in the world and is listed in the emerging industry of China and the national strategy of ocean Enhance. Along with the maximization of a fan and the deepwater offshore of an electric field, the self-elevating offshore fan mounting platform has larger self-weight and more severe working condition, and the ultra-large offshore fan mounting platform needs to apply a synchronous follow-up positioning device with multiple pile legs and shaft sleeves capable of lifting alternately so as to ensure the continuous stable self-lifting of the ultra-large platform with hundred meters of large span to prevent huge overturning moment, and improve the working efficiency on the premise of ensuring the self-elevating safety.
This patent utilizes left and right axle sleeve on the lift slider to hug closely the equipartition minor axis on the spud leg, and the drive spud leg goes up and down. All shaft sleeve units act alternately, synchronous follow-up and stroke overlapping are carried out in alternate links, and continuous non-pause reliable lifting of pile legs is achieved. However, on the equal-hole-distance pile leg, a position sensor needs to be additionally arranged for dividing a stroke overlapping area in the same stroke, the control process is complicated, the control cost is increased, and the uncontrollable risk is increased.
The national intellectual property office discloses patent document CN 1049888894a on 21/10/2015, which discloses the following: a shaft sleeve type full-continuous pile leg lifting method for an offshore wind power installation vessel comprises the following steps: (1) sending a pile leg lifting command by a control system, and releasing the pile leg by a system locking device; (2) the shaft sleeve unit (A, B, C, D) enters a first stroke stage to a second stroke stage: the shaft sleeve unit (A, C) is in the initial stage of the working stroke, the lifting slide block provides power to lift the short shaft which is closed and clasped by the left shaft sleeve and the right shaft sleeve and the pile leg which is fixed by welding together; the shaft sleeve unit (B, D) is in the separation stage, the lifting slide block and the pile leg are lifted synchronously, and the oil cylinder provides pulling force through the piston rod to separate the left shaft sleeve and the right shaft sleeve step by step; (3) the shaft sleeve unit (A, B, C, D) enters a stroke stage from the second to the third: the shaft sleeve unit (A, C) is in the middle stage of the working stroke, and the lifting slide block continues to provide power to lift the pile leg; the shaft sleeve unit (B, D) is in the idle return stroke stage, and the lifting slide block quickly descends to the horizontal line of the next target short shaft; (4) the shaft sleeve unit (A, B, C, D) enters the stages of stroke from three to four: the shaft sleeve unit (A, C) is in the later stage of the working stroke, and the lifting slide block continues to provide power to lift the pile leg; the shaft sleeve unit (B, D) is in the folding stage, the lifting slide block changes the movement speed and direction, and synchronously rises on the same horizontal line with the target short shaft, and the oil cylinder provides thrust through the piston rod to enable the left shaft sleeve and the right shaft sleeve to be gradually folded towards the target short shaft; (5) the shaft sleeve unit (A, B, C, D) enters a stroke stage from the fourth stroke stage to the fifth stroke stage: the shaft sleeve unit (A, C) is in the separation stage, the lifting slide block and the pile leg are lifted synchronously, and the oil cylinder provides pulling force through the piston rod to separate the left shaft sleeve and the right shaft sleeve step by step; the shaft sleeve unit (B, D) is in the initial stage of the working stroke, the lifting slide block provides power to lift the short shaft which is closed and tightly embraced by the left shaft sleeve and the right shaft sleeve and the pile leg which is fixed through welding; (6) the shaft sleeve unit (A, B, C, D) enters a stroke stage from fifth to sixth: the shaft sleeve unit (A, C) is in a return stroke stage, and the lifting slide block quickly descends to the horizontal line of the next target short shaft; the shaft sleeve unit (B, D) is in the middle stage of the working stroke, and the lifting slide block continues to provide power to lift the pile leg; (7) the shaft sleeve unit (A, B, C, D) enters a stroke stage from the sixth stroke to the fifth stroke: the shaft sleeve unit (A, C) is in the folding stage, the lifting slide block changes the movement speed and direction, and synchronously rises on the same horizontal line with the target short shaft, and the oil cylinder provides thrust through the piston rod to enable the left shaft sleeve and the right shaft sleeve to be gradually folded towards the target short shaft; the shaft sleeve unit (B, D) is in the later stage of the working stroke, and the lifting slide block continues to provide power to lift the pile leg; and (8) repeating the 6 stroke stages until the control system sends out a lifting stopping command of the pile leg, stopping lifting one group of shaft sleeve units in the working stroke stage, continuing to operate the other group of shaft sleeve units to the node I, stopping lifting, and starting the system locking device. The pile leg descending method has the same principle as the lifting method, but the movement direction of the lifting slide block is opposite. All the shaft sleeve units work alternately, and synchronous follow-up and stroke overlapping are performed in alternate links. The left shaft sleeve and the right shaft sleeve on the lifting slide block are tightly used for tightly holding the uniformly distributed short shafts on the pile leg to drive the pile leg to lift. All shaft sleeve units act alternately, synchronous follow-up and stroke overlapping are carried out in alternate links, and continuous non-pause reliable lifting of pile legs is achieved. However, on the equal-hole-distance pile leg, a position sensor needs to be additionally arranged for dividing a stroke overlapping area in the same stroke, the control process is complicated, the control cost is increased, and the uncontrollable risk is increased.
Disclosure of Invention
In order to overcome the above disadvantages, the present invention provides a method for lifting and lowering spud legs driven by four side cylinders of a giant offshore wind turbine installation platform. Due to the adoption of the method for driving the pile leg to lift by the four-side cylinder, the pitch difference of the pin holes is fully utilized as a stroke overlapping area, the overlapping stroke does not need to be separately distinguished by an additional control part, and the control process is simplified.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for driving pile legs to lift and descend by four cylinders of a giant offshore wind turbine installation platform comprises the following steps:
s1, changing pin hole distribution of the pile leg: the front side, the rear side, the left side and the right side of each pile leg are respectively provided with a row of front pin holes distributed at equal intervals, a row of rear pin holes distributed at equal intervals, a row of left pin holes distributed at equal intervals and a row of right pin holes distributed at equal intervals, and the left pin holes or the right pin holes are distributed in a staggered manner with the front pin holes or the rear pin holes;
s2, positioning the four side positioning pins: a front hydraulic cylinder lifting device, a rear hydraulic cylinder lifting device, a left hydraulic cylinder lifting device and a right hydraulic cylinder lifting device in the multi-cylinder driving pile leg lifting device insert positioning pins into a front pin hole, a rear pin hole, a left pin hole and a right pin hole on a pile leg respectively through an inserting pin positioning device; at the moment, the initial states are different, the front hydraulic cylinder and the rear hydraulic cylinder and the left hydraulic cylinder and the right hydraulic cylinder can not be at the same working stroke position, the middle stroke of the left hydraulic cylinder and the right hydraulic cylinder is set, and the front hydraulic cylinder and the rear hydraulic cylinder are in a 0-stroke state;
s3, starting the four cylinders simultaneously: the front hydraulic cylinder lifting device, the rear hydraulic cylinder lifting device, the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are started simultaneously, and the pile legs are driven to move upwards simultaneously through the plug pin positioning devices respectively;
s4, pulling out the left and right positioning pins, and continuing to work the front and rear hydraulic cylinders: when the left hydraulic cylinder and the right hydraulic cylinder reach the maximum stroke, the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device respectively pull the positioning pin out of the left pin hole and the right pin hole in the pile leg through the pin plugging and pulling positioning devices, and at the moment, the pile leg continues to move upwards under the action of the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device;
s5, inserting the left positioning pin and the right positioning pin into the next jack, and lifting the four cylinders simultaneously: the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device drive the plug pin positioning device to rapidly move downwards, after a next left pin hole and a next right pin hole are detected, the positioning pin is inserted, the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are simultaneously and reversely started, and the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device together drive the pile leg to move upwards;
s6, pulling out the front and rear positioning pins, and continuously operating the left hydraulic cylinder and the right hydraulic cylinder: when the front hydraulic cylinder and the rear hydraulic cylinder reach the maximum stroke, the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device respectively pull out the positioning pin from the front pin hole and the rear pin hole on the pile leg through the pin plugging and pulling positioning devices, and at the moment, the pile leg continues to move upwards under the action of the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device;
s7, inserting the front positioning pin and the rear positioning pin into the next jack, and simultaneously lifting the four cylinders: the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device drive the plug pin positioning device to rapidly move downwards, after a next front pin hole and a next rear pin hole are detected, the positioning pin is inserted, the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are simultaneously and reversely started, and the pile legs are simultaneously driven to move upwards together with the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device until the left hydraulic cylinder and the right hydraulic cylinder reach the maximum stroke;
and S8, repeating the steps S4 to S7 until the pile body reaches the required lifting height, and stopping working.
Further, in step S1, the front pin hole and the rear pin hole correspond to each other, and the left pin hole and the right pin hole correspond to each other.
Further, in step S1, the pile leg is a cylindrical structure made of E690 ultra-high strength steel material.
Further, in step S1, the inner diameter of the leg is 5m and the wall thickness is 50 mm.
Further, in step S1, the hole pitch between the adjacent front pin holes is equal to the hole pitch between the adjacent rear pin holes, the hole pitch between the adjacent left pin holes, and the hole pitch between the adjacent right pin holes, and is 2L, and the distance between the front pin hole or the rear pin hole and the left pin hole or the right pin hole in the axial direction of the leg is L.
Furthermore, the multi-cylinder driving pile leg lifting device comprises a square frame, a front hydraulic cylinder lifting device, a rear hydraulic cylinder lifting device, a left hydraulic cylinder lifting device and a right hydraulic cylinder lifting device, wherein the square frame is composed of an upper square frame, a lower square frame and four stand columns, four corners of the upper square frame are fixedly connected with the lower square frame through the four stand columns, the lower square frame and the upper square frame are parallel to each other, and a lifted pile leg penetrates through the upper square frame and the lower square frame of the square frame; the front hydraulic cylinder lifting device, the rear hydraulic cylinder lifting device, the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device are respectively arranged on the front side, the rear side, the left side and the right side of the square frame, the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device synchronously drive the pile legs to lift, and the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device synchronously drive the pile legs to lift.
Furthermore, the front hydraulic cylinder lifting device, the rear hydraulic cylinder lifting device, the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device are identical in structure.
Furthermore, the front hydraulic cylinder lifting device comprises two front hydraulic cylinders, a slide rail, a slide block and a plug pin positioning device, the two front hydraulic cylinders are vertically and downwards installed on the upper portion of the front side of the square frame, the slide rail is arranged on a front side beam of the square frame, the two front hydraulic cylinders simultaneously drive the slide block to move along the slide rail, and the plug pin positioning device is fixed on the slide block.
Furthermore, the plug pin positioning device comprises a positioning pin, a reset spring and an electromagnet, the positioning pin is transversely installed in a pin hole of the sliding block, when the electromagnet is electrified, the electromagnet pulls the positioning pin out of a front pin hole of the pile leg through magnetic force, the reset spring is compressed, and when the electromagnet is powered off, the positioning pin is pushed into the front pin hole of the pile leg under the action of the reset spring.
The invention has the beneficial effects that:
by adopting the method for driving the pile leg to lift by the four-side cylinder, the pitch difference of the pin holes is fully utilized as a stroke overlapping area, and the overlapping stroke does not need to be separately distinguished by a control part additionally, so that the control process is simplified, and the pile leg is more stably moved, and is safer and more reliable.
Drawings
The invention is further described with the aid of the accompanying drawings, in which the embodiments do not constitute any limitation, and for a person skilled in the art, without inventive effort, further drawings may be obtained from the following figures:
FIG. 1 is a flow chart of the present invention;
fig. 2 is a schematic structural view of a leg of the present invention;
fig. 3 is a schematic structural diagram of the multi-cylinder driving pile leg lifting device of the invention;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a schematic structural view of the square frame shown in FIG. 3;
FIG. 6 is a schematic structural view of the front hydraulic cylinder lifting device shown in FIG. 3;
FIG. 7 is a schematic structural view of the pin positioning device shown in FIG. 6;
FIG. 8 is a state diagram of the front cylinder stroke of the front cylinder lift;
fig. 9 is a left cylinder stroke state diagram of the front cylinder lift.
In the figure: 1. a square frame; 2. A front hydraulic cylinder lifting device; 3. A rear hydraulic cylinder lifting device; 4. A left hydraulic cylinder lifting device; 5. A right hydraulic cylinder lifting device; 6. an upper square frame; 7. a lower square frame; 8. a column; 9. pile legs; 10. a front pin hole; 11. a left pin hole; 12. a right pin hole; 13. a front hydraulic cylinder; 14. a slide rail; 15. a slider; 16. a plug pin positioning device; 17. positioning pins; 18. a return spring; 19. an electromagnet; 20. a stepped bore; 21. a stopper; 22. and a left hydraulic cylinder.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it is to be noted that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element 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.
As shown in fig. 1, a method for driving spud legs to lift and lower by four cylinders of a giant offshore wind turbine installation platform includes the following steps:
s1, changing pin hole distribution of the pile leg: as shown in fig. 2, a row of front pin holes 10 distributed at equal intervals, a row of rear pin holes (not shown) distributed at equal intervals, a row of left pin holes 11 distributed at equal intervals and a row of right pin holes 12 distributed at equal intervals are respectively arranged on the front, rear, left and right side surfaces of the pile leg 9, and the left pin holes 11 or the right pin holes 12 are distributed in a staggered manner with the front pin holes 10 or the rear pin holes; the front pin holes 10 correspond to the rear pin holes, the left pin holes 11 correspond to the right pin holes 12, the hole distance between the adjacent front pin holes 10 is equal to the hole distance between the adjacent rear pin holes, the hole distance between the adjacent left pin holes 11 and the hole distance between the adjacent right pin holes 12, and the hole distances are all 2L, and the distance between each front pin hole or each rear pin hole and the distance between each left pin hole or each right pin hole in the axial direction of the pile leg 9 is L. The leg 9 is a cylindrical structure made of E690 ultra high strength steel material with an inner diameter of 5m and a wall thickness of 50 mm.
Positioning four side positioning pins:
as shown in fig. 3, 4 and 5, the multi-cylinder driving pile leg lifting device comprises a square frame 1, a front hydraulic cylinder lifting device 2, a rear hydraulic cylinder lifting device 3, a left hydraulic cylinder lifting device 4 and a right hydraulic cylinder lifting device 5, wherein the square frame 1 is composed of an upper square frame 6, a lower square frame 7 and four upright posts 8, four corners of the upper square frame 6 are fixedly connected with the lower square frame 7 through the four upright posts 8, the lower square frame 7 and the upper square frame 6 are parallel to each other, and a lifted pile leg 9 penetrates through the upper square frame and the lower square frame of the square frame 1; the front hydraulic cylinder lifting device 2, the rear hydraulic cylinder lifting device 3, the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 are respectively installed on the front side, the rear side, the left side and the right side of the square frame 1, the front hydraulic cylinder lifting device 2 and the rear hydraulic cylinder lifting device 3 synchronously drive the pile legs to lift, and the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 synchronously drive the pile legs to lift. The front hydraulic cylinder lifting device 2 and the rear hydraulic cylinder lifting device 3 synchronously drive the pile legs to lift, and the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 have the same structure;
a front hydraulic cylinder lifting device 2, a rear hydraulic cylinder lifting device 3, a left hydraulic cylinder lifting device 4 and a right hydraulic cylinder lifting device 5 in the multi-cylinder driving pile leg lifting device respectively insert positioning pins into a front pin hole, a rear pin hole, a left pin hole and a right pin hole on a pile leg 9 through a pin inserting and pulling positioning device; at this time, the initial state is different, the front and rear hydraulic cylinders and the left and right hydraulic cylinders cannot be at the same working stroke position, the middle stroke of the left and right hydraulic cylinders is set, the front and rear hydraulic cylinders are in 0 stroke state, at this time, the front hydraulic cylinder 13 stroke state of the front hydraulic cylinder lifting device 2 and the left hydraulic cylinder 22 stroke state of the left hydraulic cylinder lifting device 4 are as shown in fig. 8;
s3, starting the four cylinders simultaneously: the front hydraulic cylinder lifting device 2, the rear hydraulic cylinder lifting device 3, the left hydraulic cylinder lifting device 4 and the rear hydraulic cylinder lifting device 5 are started simultaneously, the pile legs are driven to move upwards through the inserted pin positioning devices simultaneously, and at the moment, the front hydraulic cylinder stroke state of the front hydraulic cylinder lifting device 2 and the left hydraulic cylinder stroke state of the left hydraulic cylinder lifting device 4 are as shown in fig. 9;
s4, pulling out the left and right positioning pins, and continuing to work the front and rear hydraulic cylinders: when the left hydraulic cylinder and the right hydraulic cylinder in the left hydraulic cylinder lifting device 4 and the rear hydraulic cylinder lifting device 5 reach the maximum stroke, the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 respectively pull out the positioning pin from the left pin hole and the right pin hole on the pile leg through the pin plugging and pulling positioning devices, and at the moment, under the action of the front hydraulic cylinder lifting device 2 and the rear hydraulic cylinder lifting device 3, the pile leg 9 continues to move upwards;
s5, inserting the left positioning pin and the right positioning pin into the next jack, and lifting the four cylinders simultaneously: the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 drive the plug pin positioning device to rapidly move downwards, after a next left pin hole and a next right pin hole are detected, a positioning pin is inserted, the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are simultaneously and reversely started, and the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device together with the front hydraulic cylinder lifting device 2 and the rear hydraulic cylinder lifting device 3 drive the pile leg to move upwards;
s6, pulling out the front and rear positioning pins, and continuously operating the left hydraulic cylinder and the right hydraulic cylinder: when the front hydraulic cylinder and the rear hydraulic cylinder reach the maximum stroke, the front hydraulic cylinder lifting device 2 and the rear hydraulic cylinder lifting device 3 respectively pull out the positioning pins from the front pin holes and the rear pin holes on the pile legs through the pin plugging and pulling positioning devices, and at the moment, under the action of the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5, the pile legs 9 continue to move upwards;
s7, inserting the front positioning pin and the rear positioning pin into the next jack, and simultaneously lifting the four cylinders: the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 drive the plug pin positioning device to rapidly move downwards, after a next front pin hole and a next back pin hole are detected, a positioning pin is inserted, the front hydraulic cylinder lifting device 2 and the back hydraulic cylinder lifting device 3 are simultaneously and reversely started, and the pile legs are simultaneously driven to move upwards together with the left hydraulic cylinder lifting device 4 and the right hydraulic cylinder lifting device 5 until the left hydraulic cylinder and the right hydraulic cylinder reach the maximum stroke;
and S8, repeating the steps S4 to S7 until the pile body reaches the required lifting height, and stopping working.
As shown in fig. 8, the front hydraulic cylinder lifting device includes two front hydraulic cylinders 13, a slide rail 14, a slide block 15, and a plug pin positioning device 16, the two front hydraulic cylinders 13 are vertically and downwardly installed on the upper portion of the front side of the square frame 1, the slide rail is installed on the square frame 1, the two front hydraulic cylinders 13 simultaneously drive the slide block 15 to move along the slide rail 14, and the plug pin positioning device 16 is installed on the slide block 15.
The method has the greatest characteristics that: the hole pitch difference of the pin holes is fully utilized as a stroke overlapping area, overlapping strokes do not need to be distinguished separately by a control part, the control process is simplified, and the pile leg moves more stably, safely and reliably.
As shown in fig. 9, the pin-inserting and pulling positioning device 16 comprises a positioning pin 17, a return spring 18 and an electromagnet 19, wherein the positioning pin 17 is transversely installed in a stepped hole 20 of the sliding block, when the electromagnet 19 is powered on, the electromagnet 19 pulls the positioning pin 17 out of a front pin hole of the spud leg 9 through magnetic force, the return spring 18 is compressed, and when the electromagnet 19 is powered off, the positioning pin 17 is pushed into the front pin hole of the spud leg 9 under the action of the return spring 18.
Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (9)

1. A method for continuously preheating and multi-section welding installation of a giant maritime work pile leg on site comprises the following steps:
s1, changing pin hole distribution of the pile leg: the front side, the rear side, the left side and the right side of each pile leg are respectively provided with a row of front pin holes distributed at equal intervals, a row of rear pin holes distributed at equal intervals, a row of left pin holes distributed at equal intervals and a row of right pin holes distributed at equal intervals, and the left pin holes or the right pin holes are distributed in a staggered manner with the front pin holes or the rear pin holes;
s2, positioning the four side positioning pins: a front hydraulic cylinder lifting device, a rear hydraulic cylinder lifting device, a left hydraulic cylinder lifting device and a right hydraulic cylinder lifting device in the multi-cylinder driving pile leg lifting device insert positioning pins into a front pin hole, a rear pin hole, a left pin hole and a right pin hole on a pile leg respectively through an inserting pin positioning device; at the moment, the initial states are different, the front hydraulic cylinder and the rear hydraulic cylinder and the left hydraulic cylinder and the right hydraulic cylinder can not be at the same working stroke position, the middle stroke of the left hydraulic cylinder and the right hydraulic cylinder is set, and the front hydraulic cylinder and the rear hydraulic cylinder are in a 0-stroke state;
s3, starting the four cylinders simultaneously: the front hydraulic cylinder lifting device, the rear hydraulic cylinder lifting device, the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are started simultaneously, and the pile legs are driven to move upwards simultaneously through the plug pin positioning devices respectively;
s4, pulling out the left and right positioning pins, and continuing to work the front and rear hydraulic cylinders: when the left hydraulic cylinder and the right hydraulic cylinder reach the maximum stroke, the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device respectively pull the positioning pin out of the left pin hole and the right pin hole in the pile leg through the pin plugging and pulling positioning devices, and at the moment, the pile leg continues to move upwards under the action of the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device;
s5, inserting the left positioning pin and the right positioning pin into the next jack, and lifting the four cylinders simultaneously: the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device drive the plug pin positioning device to rapidly move downwards, after a next left pin hole and a next right pin hole are detected, the positioning pin is inserted, the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are simultaneously and reversely started, and the left hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device together drive the pile leg to move upwards;
s6, pulling out the front and rear positioning pins, and continuously operating the left hydraulic cylinder and the right hydraulic cylinder: when the front hydraulic cylinder and the rear hydraulic cylinder reach the maximum stroke, the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device respectively pull out the positioning pin from the front pin hole and the rear pin hole on the pile leg through the pin plugging and pulling positioning devices, and at the moment, the pile leg continues to move upwards under the action of the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device;
s7, inserting the front positioning pin and the rear positioning pin into the next jack, and simultaneously lifting the four cylinders: the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device drive the plug pin positioning device to rapidly move downwards, after a next front pin hole and a next rear pin hole are detected, the positioning pin is inserted, the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device are simultaneously and reversely started, and the pile legs are simultaneously driven to move upwards together with the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device until the left hydraulic cylinder and the right hydraulic cylinder reach the maximum stroke;
and S8, repeating the steps S4 to S7 until the pile body reaches the required lifting height, and stopping working.
2. The method of claim 1, wherein the four-sided cylinder driven spud legs of the installation platform of the giant offshore wind turbine are lifted and lowered, and the method comprises the following steps: in step S1, the front pin hole and the rear pin hole correspond to each other, and the left pin hole and the right pin hole correspond to each other.
3. The method of claim 2, wherein the four-sided cylinder driven spud legs of the installation platform of the giant offshore wind turbine are lifted and lowered, and the method comprises the following steps: in step S1, the hole pitch between the adjacent front pin holes is equal to the hole pitch between the adjacent rear pin holes, the hole pitch between the adjacent left pin holes, and the hole pitch between the adjacent right pin holes, and the hole pitches are all 2L, and the distance between the front pin hole or the rear pin hole and the left pin hole or the right pin hole is L in the axial direction of the leg.
4. The method of claim 3, wherein the four-sided cylinder driven spud legs of the installation platform of the giant offshore wind turbine are lifted and lowered, and the method comprises the following steps: in step S1, the leg is a cylindrical structure made of E690 ultra-high strength steel material.
5. The method of claim 4, wherein the method comprises the steps of: in step S1, the leg has an inner diameter of 5m and a wall thickness of 50 mm.
6. The method of lifting/lowering four-sided cylinder driven spud legs of a giant offshore wind turbine installation platform according to any of claims 1 to 5, wherein: the multi-cylinder driving pile leg lifting device comprises a square frame, a front hydraulic cylinder lifting device, a rear hydraulic cylinder lifting device, a left hydraulic cylinder lifting device and a right hydraulic cylinder lifting device, wherein the square frame is composed of an upper square frame, a lower square frame and four stand columns, four corners of the upper square frame are fixedly connected with the lower square frame through the four stand columns, the lower square frame and the upper square frame are parallel to each other, and a lifted pile leg penetrates through the upper square frame and the lower square frame of the square frame; the front hydraulic cylinder lifting device, the rear hydraulic cylinder lifting device, the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device are respectively arranged on the front side, the rear side, the left side and the right side of the square frame, the front hydraulic cylinder lifting device and the rear hydraulic cylinder lifting device synchronously drive the pile legs to lift, and the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device synchronously drive the pile legs to lift.
7. The method of claim 6, wherein the four-sided cylinder driven spud legs of the installation platform of the giant offshore wind turbine are lifted and lowered, and the method comprises the following steps: the front hydraulic cylinder lifting device, the rear hydraulic cylinder lifting device, the left hydraulic cylinder lifting device and the right hydraulic cylinder lifting device are identical in structure.
8. The method of claim 7, wherein the four-sided cylinder driven spud legs of the installation platform of the giant offshore wind turbine are lifted or lowered, and the method comprises the following steps: the front hydraulic cylinder lifting device comprises two front hydraulic cylinders, a slide rail, a slide block and a plug pin positioning device, the two front hydraulic cylinders are vertically and downwards mounted on the upper portion of the front side of the square frame, the slide rail is arranged on a front side beam of the square frame, the two front hydraulic cylinders simultaneously drive the slide block to move along the slide rail, and the plug pin positioning device is fixed on the slide block.
9. The method of claim 8, wherein the four-sided cylinder driven spud legs of the installation platform of the giant offshore wind turbine are lifted or lowered, and the method comprises the following steps: the plug pin positioning device comprises a positioning pin, a reset spring and an electromagnet, wherein the positioning pin is transversely arranged in a pin hole of the sliding block, when the electromagnet is electrified, the electromagnet pulls the positioning pin out of a front pin hole of the pile leg through magnetic force, the reset spring is compressed, and when the electromagnet is not electrified, the positioning pin is pushed into the front pin hole of the pile leg under the action of the reset spring.
CN202010861191.6A 2020-08-25 2020-08-25 Method for driving pile legs to lift and descend by four side cylinders of giant offshore wind turbine installation platform Active CN112095573B (en)

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Publication number Priority date Publication date Assignee Title
CN102839640A (en) * 2012-09-06 2012-12-26 上海利策科技股份有限公司 Locking mechanism for self-elevating drilling platform
CN104727287A (en) * 2015-03-06 2015-06-24 广东精铟海洋工程股份有限公司 Hydraulic lifting device capable of automatically dropping and automatic pile dropping method thereof
CN105672236A (en) * 2016-04-14 2016-06-15 上海尚鉴机械工程有限公司 Pin type rapid lifting mechanism and lifting method thereof
CN106239234A (en) * 2016-08-27 2016-12-21 余静远 A kind of elevating mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102839640A (en) * 2012-09-06 2012-12-26 上海利策科技股份有限公司 Locking mechanism for self-elevating drilling platform
CN104727287A (en) * 2015-03-06 2015-06-24 广东精铟海洋工程股份有限公司 Hydraulic lifting device capable of automatically dropping and automatic pile dropping method thereof
CN105672236A (en) * 2016-04-14 2016-06-15 上海尚鉴机械工程有限公司 Pin type rapid lifting mechanism and lifting method thereof
CN106239234A (en) * 2016-08-27 2016-12-21 余静远 A kind of elevating mechanism

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