CN115404918B

CN115404918B - Anti-scouring and levelness adjusting device for offshore wind power negative pressure barrel and operation method thereof

Info

Publication number: CN115404918B
Application number: CN202210943166.1A
Authority: CN
Inventors: 施兴华; 刘博�; 张婧
Original assignee: Jiangsu University of Science and Technology
Current assignee: Jiangsu University of Science and Technology
Priority date: 2022-08-08
Filing date: 2022-08-08
Publication date: 2023-06-06
Anticipated expiration: 2042-08-08
Also published as: CN115404918A

Abstract

The invention discloses an anti-scouring and levelness adjusting device of an offshore wind power negative pressure barrel, which comprises a negative pressure barrel, wherein the negative pressure barrel is divided into 7 compartments, each compartment comprises 6 fan-shaped compartments and a round compartment, and each compartment is provided with a butt joint hole for butt joint and air extraction with an air pump; the outer sleeve is provided with a plurality of round small holes on the side wall, round flat plates are arranged in the fan-shaped cabin section of the negative pressure barrel, the periphery of the plates is connected with a hydraulic rod by a rotating rod, a cross brace is arranged between the hydraulic rod and a rear support frame, and the outer sleeve also comprises a connecting rod; sand with the same grading is filled between the outer sleeve barrel and the negative pressure barrel, lateral load is resisted after sinking, scouring is prevented, and the small holes on the outer sleeve barrel can enhance the lateral friction resistance of the pile and improve the bearing capacity of the pile; when the barrel top level of the inner circle flat plate of the cabin does not meet the requirement after the barrel is submerged, the inclination of the negative pressure barrel can be adjusted through the interaction of the hydraulic device, namely the round flat plate and the soil body, and the device can be detected in real time in the use process.

Description

Anti-scouring and levelness adjusting device for offshore wind power negative pressure barrel and operation method thereof

Technical Field

The invention relates to the technical field of offshore wind power, in particular to an anti-scouring and levelness adjusting device for an offshore wind power negative pressure barrel and an operating method thereof.

Background

The offshore wind energy resource is rich, the development of the offshore wind turbine is also greatly supported, and the negative pressure barrel foundation is widely used in offshore engineering at home and abroad.

The negative pressure bucket foundation can be prefabricated on land in advance and towed to the installation sea area, the foundation does not need piling, the construction speed is high, and the offshore construction operation window period is effectively utilized.

When the negative pressure barrel foundation is installed, the air is pumped down, so that the requirement on the sinking control of the barrel body is higher. In the process of negative pressure sinking, water pressure difference is generated inside and outside the barrel to cause soil seepage, but excessive seepage can lead to liquefaction or flow of the soil in the barrel, so that structural inclination occurs. In some sea areas, the water flow flushing has a great influence on the negative pressure barrel, and structural inclination is also possible.

After the sinking of the negative pressure barrel of the offshore wind turbine is finished in a coastal sea area, the horizontal deviation of the barrel top of the negative pressure barrel is not in accordance with the allowable deviation of the pile top horizontal degree due to the influence of water flow scouring and errors existing in the construction process, and a plurality of remedial measures are adopted to ensure that the allowable deviation of the pile top horizontal degree cannot be achieved, so that the suction barrel foundation always bears a larger eccentric load, and finally two offshore wind turbines collapse in the sea area, thereby causing serious loss.

Disclosure of Invention

The invention aims to: aiming at the problems, the invention aims to provide an anti-scouring and levelness adjusting device for an offshore wind power negative pressure barrel, which solves the problems of water flow scouring, negative pressure barrel inclination in the construction process and the like, and avoids collapse accidents from happening again. And provides an operation method thereof.

The technical scheme is as follows: the utility model provides an offshore wind power negative pressure bucket scour prevention and levelness adjustment device, including the negative pressure bucket, sink the slope detection mechanism, waterproof stream scour mechanism, levelness adjustment mechanism, a control system, the tower, the butt joint pipe, the detection mechanism that sinks is installed in the negative pressure bucket inside and divide into a plurality of independent cabins with its inside, the waterproof stream scour mechanism is inside arranged in to the whole that both constitute, the three is coaxial to be set up, tower closing cap three top is fixed, control system installs on the tower, the outer wall of negative pressure bucket is fixed with waterproof stream scour mechanism, be equipped with a levelness adjustment mechanism in each cabin in the negative pressure bucket inside respectively, every levelness adjustment mechanism is connected with the detection mechanism that sinks respectively, every cabin matches and has a butt joint pipe, the butt joint pipe is worn to be installed on the tower and is led to corresponding cabin at vertical interval, every butt joint pipe is connected the aspiration pump respectively, aspiration pump, the detection mechanism that sinks, levelness adjustment mechanism is connected with control system signal respectively.

The device can prevent inclination in the sinking process of the negative pressure barrel, and improves the construction precision; the negative pressure barrel can resist lateral load when being flushed by water flow after sinking, so that the harm of water flow flushing is reduced; when the water level of the barrel top after the negative pressure barrel is inclined does not meet the requirement, the problem can be solved by an effective method, and correction is carried out.

Further, the sinking inclination detection mechanism comprises a support component, rectangular compartment plates, round compartment plates, cross braces, trapezoid tables and soil body displacement detection pieces, wherein the round compartment plates are arranged in the middle of a negative pressure barrel, the bottom ends of the round compartment plates are coaxially fixed with the negative pressure barrel, the middle of the negative pressure barrel is divided into a round independent compartment, the rectangular compartment plates are arranged between the round compartment plates and the negative pressure barrel at intervals, the annular wall between the round compartment plates is equally divided into six fan-shaped independent compartments, two side edges of the rectangular compartment plates are respectively fixed with the outer wall of the round compartment plates and the inner wall of the negative pressure barrel, a support component is arranged in each compartment, the support component is of a hexagonal cylindrical structure formed by sequentially welding six rectangular steel plates, the outer peripheral walls of the support component are respectively fixed with the rectangular compartment plates, the outer wall of the round compartment plates and the inner wall of the negative pressure barrel, each rectangular steel plate is provided with a trapezoid table towards the inner upper part of the inner side, the soil body displacement detection pieces are arranged on the trapezoid tables through the cross braces, and the levelness adjustment mechanism is arranged in the support component and are sequentially connected with the six trapezoid tables.

Further, the soil body displacement detection piece includes laser emitter, laser receiver, installs respectively on the one end of inserted sheet, and the stull is fixed in trapezoidal bench, is equipped with the recess on it, installs a plurality of fixture blocks one through a plurality of upper locking spring intervals on one of them medial surface of recess, installs a plurality of fixture blocks two through a plurality of lower locking spring intervals on the other medial surface, and the opposite both sides of inserted sheet correspond respectively and are equipped with a plurality of breach, and the inserted sheet inserts in the recess and through fixture block one, two joint of fixture block on the stull, laser emitter, laser receiver respectively with control system signal connection.

Further, the waterproof flushing mechanism comprises an outer sleeve barrel, side partition plates and lower rib plates, wherein the negative pressure barrel is coaxially arranged in the outer sleeve barrel, a hollow area is formed between the negative pressure barrel and the outer wall of the negative pressure barrel, the outer wall of the negative pressure barrel and the inner wall of the outer sleeve barrel are fixed through the side partition plates arranged at a plurality of intervals, the lower rib plates are of annular structures, the cross section of each lower rib plate is of an isosceles right triangle, the bottom edge of the inner barrel of the outer sleeve barrel is provided with a circle of inclined 45-degree protrusions, the hypotenuse of each lower rib plate is fixed with the bottom of the outer sleeve barrel, the two right-angle edges are respectively fixed with the bottom edges of the side partition plates and the outer wall of the negative pressure barrel, a plurality of holes are distributed on the outer peripheral surface of the outer sleeve barrel at intervals, and the hollow area is filled with a mixture of sand and crushed stone which are identical to the outer grading of the barrel.

The filling material in the holes and the hollow areas is sand with the same grading as surrounding soil mass through engineering geological exploration, and a certain amount of stone is used for assisting to ensure the effective filling of the sand, so that the sand is prevented from flowing out of the holes.

Optimally, the interval between the negative pressure barrel and the external sleeve barrel is 0.5-0.55 m.

Further, levelness guiding mechanism includes round flat board, dwang, axis of rotation one, axis of rotation two, connecting rod, hydraulic stem, support frame, and round flat board sets up in the upper portion of negative pressure bucket and is close to the tower section of thick bamboo, and round flat board's circumference interval is equipped with a plurality of dwang, and the one end of dwang is articulated with round flat board's outer peripheral face through axis of rotation one, and the other end has a connecting rod through axis of rotation two articulates respectively, and every connecting rod is connected with a hydraulic stem respectively, and every hydraulic stem is installed on sinking slope detection mechanism through a support frame respectively, hydraulic stem and control system signal connection.

Optimally, the levelness adjustment mechanism further comprises a direction limiter and buffer rubber, the direction limiter comprises two limiting blocks, the connecting part of the rotating rod and the connecting rod is arranged on the upper side of the end part of the rotating rod at a relatively parallel interval, the buffer rubber is fixed on the upper side of the corresponding end part of the connecting rod, and the side surfaces of the two limiting blocks are respectively abutted against the buffer rubber.

The direction limiter is a device for limiting the upward rotation of the rotating rod, the limiting block is of a trilateral block structure consisting of two right-angle sides and a section of circular arc, and when the rotating rod has an upward rotation trend, the welded direction limiter can squeeze buffer rubber attached on the connecting rod, so that the rotating rod cannot rotate upward; in order to provide a better downward movement of the round plate when it is hydraulically pressed by the hydraulic lever, the swivel lever can be given a small downward rotation angle and then be welded with the direction limiter.

The operation method of the anti-scouring and levelness adjusting device for the offshore wind power negative pressure barrel comprises the following steps of:

step one: the suction pump pumps air to each compartment through the connecting pipe, so that negative pressure is formed in the negative pressure barrel, the negative pressure barrel begins to be constructed and sunk, the sinking inclination detection mechanism begins to detect, the control system calculates the average value of the displacement of soil bodies in the fan-shaped compartments from the top of the barrel through feedback information of the sinking inclination detection mechanism, and then the displacement of the whole negative pressure barrel in the sinking process is regulated through the difference value of the displacement of each compartment from the top of the barrel, so that the negative pressure barrel meets the requirement in the sinking process, and the inclination in the sinking process is prevented;

step two: after sinking is finished, when the negative pressure barrel is flushed by water flow, the pile side friction force on the periphery of the negative pressure barrel is increased through the water flow flushing prevention mechanism, so that the horizontal bearing capacity of the negative pressure barrel is improved, meanwhile, part of wave force of the water flow is counteracted by the water flow flushing prevention mechanism, sand outside the device can flow into the water flow flushing prevention mechanism under the flushing of the water flow, and the dead weight is kept, so that the negative pressure barrel cannot be flushed by the water flow;

step three: after the negative pressure barrel reaches a designated position, when the levelness of the barrel top does not meet the requirement, a control system sends an instruction to the levelness adjusting mechanism, the levelness adjusting mechanism on the corresponding compartment receives the instruction, the filler in the negative pressure barrel is extruded, the levelness of the negative pressure barrel top is adjusted within an error allowable range through acting force and reacting force, and eccentric load born by a negative pressure barrel foundation is eliminated.

The beneficial effects are that: compared with the prior art, the invention has the advantages that:

1. can avoid the negative pressure bucket to take place the slope at the in-process of sinking, ensure that great deviation can not appear in the displacement of the in-process staving of sinking, improve the precision of work progress.

2. After the negative pressure barrel is settled, lateral load and overturning moment generated by water flow scouring can be resisted, sand around the barrel is reinforced, and the negative pressure barrel is prevented from tilting due to water flow scouring.

3. If the negative pressure barrel inclines, the design requirement on levelness is not met, and the hydraulic device is used for downwards pressing and adjusting the displacement of the inner circular flat plate of the fan-shaped compartment, so that the levelness of the top end of the barrel meets the requirement, and the problems existing in the construction and use processes are fully considered.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a top view of the internal structure of the present invention;

FIG. 3 is a schematic view of the connection structure of the trapezoidal table;

FIG. 4 is a schematic view of a soil displacement detecting member mounting structure;

FIG. 5 is a plan view of soil displacement detecting members in each compartment;

FIG. 6 is a flow chart of the soil displacement detecting member sinking process;

FIG. 7 is a schematic illustration of an external sleeve connection;

FIG. 8 is a schematic view of a levelness adjustment mechanism;

FIG. 9 is a schematic view of the dispersion structure of the direction limiter and the cushion rubber;

FIG. 10 is a schematic view of the abutting structure of the direction limiter and the cushion rubber;

fig. 11 is an exploded view of the present invention.

Detailed Description

The invention will be further elucidated with reference to the drawings and to specific embodiments, it being understood that these embodiments are only intended to illustrate the invention and are not intended to limit the scope thereof.

The invention discloses an anti-scouring and levelness adjusting device for an offshore wind power negative pressure barrel, which comprises a sinking inclination detecting mechanism 1, a water flow scouring preventing mechanism 2, a levelness adjusting mechanism 3, a control system 4, a tower 5 and a butt joint pipe 6 as shown in figures 1 and 11. The butt joint pipe 6 is a device for carrying out air suction in butt joint with an air suction pump when the offshore wind turbine is in sinking operation. The control system 4 is located inside the tower 5. The sinking inclination detection mechanism 1 is arranged in the negative pressure barrel 1-1 and divides the interior of the negative pressure barrel 1-1 into a plurality of independent compartments, the whole body formed by the negative pressure barrel 1-1 and the negative pressure barrel is arranged in the waterproof flushing mechanism 2, the negative pressure barrel 1-1, the waterproof flushing mechanism 2 and the waterproof flushing mechanism are coaxially arranged, the tower barrel 5 covers the negative pressure barrel 1-1 and is fixed, each compartment in the negative pressure barrel 1-1 is respectively provided with a levelness adjustment mechanism 3, each levelness adjustment mechanism 3 is respectively connected with the sinking inclination detection mechanism 1, each compartment is matched with a butt joint pipe 6, the butt joint pipe 6 is vertically arranged on the tower barrel 5 in a penetrating way and is communicated with the corresponding compartment, each butt joint pipe 6 is respectively connected with an air pump, and the air pump, the sinking inclination detection mechanism 1 and the levelness adjustment mechanism 3 are respectively connected with the control system 4 in a signal way.

As shown in fig. 2 and 3, the sinking inclination detection mechanism 1 comprises a support component 1-2, a rectangular compartment plate 1-3, a round compartment plate 1-4, a cross brace 1-5, a trapezoid table 1-6 and a soil body displacement detection member 1-7, wherein the round compartment plate 1-4 is arranged in the middle of a negative pressure barrel 1-1, the bottom end of the round compartment plate is coaxially fixed with the negative pressure barrel 1-1, the middle of the negative pressure barrel 1-1 is divided into a round independent compartment, six rectangular compartment plates 1-3 are arranged between the round compartment plate 1-4 and the negative pressure barrel 1-1 at intervals, an annular wall body between the round compartment plates is equally divided into six fan-shaped independent compartments, the two side edges of the rectangular compartment plate 1-3 are respectively fixed with the outer wall of the circular compartment plate 1-4 and the inner wall of the negative pressure barrel 1-1, a supporting component 1-2 is arranged in each compartment, the supporting component 1-2 is formed by welding six rectangular steel plates, is placed in a hexagon, is welded with the top surface of the negative pressure barrel 1-1, is welded with the side surface of the negative pressure barrel 1-1, the side surface of the rectangular side baffle plate 1-3 and the side surface of the circular side baffle plate 1-4, a trapezoid table 1-6 is welded on each rectangular steel plate of the supporting component 1-2, a transverse strut 1-5 is welded on the trapezoid table 1-6, and a soil body displacement detecting part 1-7 is arranged on the transverse strut 1-5 through an elastic locking device.

As shown in fig. 4, the soil displacement detecting device 1-7 comprises a laser emitter 1-7-3 and a laser receiver 1-7-4, which are respectively arranged at one end of an inserting sheet, a cross brace 1-5 is fixed in a trapezoid table 1-6, a groove is arranged on the cross brace, a plurality of clamping blocks I are arranged on one inner side surface of the groove at intervals through a plurality of upper locking springs 1-7-1, a plurality of clamping blocks II are arranged on the other inner side surface at intervals through a plurality of lower locking springs 1-7-2, a plurality of notches are correspondingly arranged on two opposite sides of the inserting sheet, the inserting sheet is inserted into the groove and is clamped on the cross brace 1-5 through the clamping blocks I and the clamping blocks II, and the laser emitter 1-7-3 and the laser receiver 1-7-4 are respectively connected with a control system 4 through signals. The protruding part in the transverse support 1-5 can move up and down through the upper locking spring 1-7-1 and the lower locking spring 1-7-2, the soil body displacement detecting piece 1-7 is provided with a corresponding concave part, and the top end of the soil body displacement detecting piece 1-7 is provided with the laser transmitter 1-7-3 and the laser receiver 1-7-4. The working mode is as follows: the soil body displacement detecting element 1-7 is installed on the transverse support 1-5, the circular protruding part can be propped open when the soil body displacement detecting element slides inwards, the upper locking spring 1-7-1 and the lower locking spring 1-7-2 can be propped up the protruding part after the installation is completed, one side of the square protrusion can lock the soil body displacement detecting element 1-7, and data can be recorded through the laser transmitter 1-7-3 and the laser receiver 1-7-4 at the front end of the soil body displacement detecting element 1-7 when the soil body displacement detecting element sinks.

As shown in fig. 5 and 6, the soil displacement detecting members 1-7 are connected with the control system 4, the six sector compartments are respectively marked as a, b, c, d, e, f, and specific reference numerals are respectively carried out on the sector compartments and the soil displacement detecting members 1-7 in the sector compartments in the control system: the specific labels of the corresponding soil body displacement detecting pieces 1-7 in the sector-shaped compartment a are 1-7-a1, 1-7-a2, 1-7-a3, 1-7-a4, 1-7-a5 and 1-7-a6; the specific labels of the corresponding soil body displacement detecting pieces 1-7 in the sector-shaped compartment b are 1-7-b1, 1-7-b2, 1-7-b3, 1-7-b4, 1-7-b5 and 1-7-b6; the specific labels of the corresponding soil body displacement detecting pieces 1-7 in the sector-shaped compartment c are 1-7-c1, 1-7-c2, 1-7-c3, 1-7-c4, 1-7-c5 and 1-7-c6; the specific labels of the corresponding soil body displacement detecting pieces 1-7 in the sector-shaped compartment d are 1-7-d1, 1-7-d2, 1-7-d3, 1-7-d4, 1-7-d5 and 1-7-d6; the specific labels of the corresponding soil body displacement detecting pieces 1-7 in the sector-shaped compartment e are 1-7-e1, 1-7-e2, 1-7-e3, 1-7-e4, 1-7-e5 and 1-7-e6; the specific labels of the corresponding soil body displacement detecting pieces 1-7 in the fan-shaped compartment f are 1-7-f1, 1-7-f2, 1-7-f3, 1-7-f4, 1-7-f5 and 1-7-f6. The working mode is as follows: when the offshore wind turbine is sunk, the six opposite connection pipes 6 in the fan-shaped compartment are connected with the air pump, negative pressure is formed in the negative pressure barrel 1-1 by air suction to sink, at the moment, the control system 4 respectively measures the displacement of the soil displacement detection pieces 1-7 in each fan-shaped compartment, for example, in the fan-shaped compartment a, the displacement of each soil displacement detection piece in the compartment is 1-7-a1, 1-7-a2, 1-7-a3, 1-7-a4, 1-7-a5 and 1-7-a6, calculating the average value 1-7-a of the displacement of the soil body in the fan-shaped compartment from the top of the barrel in the control system 4, solving the average value 1-7-b, 1-7-c, 1-7-d, 1-7-e and 1-7-f of the displacement of the soil body in the b, c, d, e, f compartment from the top of the barrel in the control system 4, recording, periodically measuring the average value of the displacement of the soil body in each compartment from the top of the barrel in the sinking process by the control system 4, comparing whether the recorded six displacement average values have larger differences, and if the compared results are consistent, proving that the negative pressure barrel 1-1 does not incline in the sinking process; if the difference between the compared results is larger, the negative pressure is regulated by the suction pump butted by the butt joint pipe 4 in each corresponding compartment to control the descending speed and displacement, and the control system 4 ensures that the whole negative pressure barrel cannot incline in the descending process through the real-time detection of the soil body displacement detection pieces 1-7 in the sinking process.

The waterproof flushing mechanism 2 comprises an outer sleeve barrel 2-1, side separation plates 2-2 and lower rib plates 2-4, wherein the negative pressure barrel 1-1 is coaxially arranged in the outer sleeve barrel 2-1, a hollow area 2-3 is arranged between the two side separation plates, the outer wall of the negative pressure barrel 1-1 and the inner wall of the outer sleeve barrel 2-1 are fixed through the side separation plates 2-2 arranged at intervals, the lower rib plates 2-4 are of annular structures, the cross sections of the lower rib plates are isosceles right triangles, the bottom edges of the inner barrel of the outer sleeve barrel 2-1 are provided with a circle of protrusions inclined by 45 degrees, the hypotenuse of the lower rib plates 2-4 are fixed with the bottom of the outer sleeve barrel 2-1, the two right-angle sides are respectively fixed with the bottom edges of the side separation plates 2-2 and the outer wall of the negative pressure barrel 1-1, a plurality of holes are distributed on the outer peripheral surface of the outer sleeve barrel 2-1 at intervals, and the hollow area 2-3 is filled with sand and crushed stone mixture with the same grading as the outer barrel.

Referring to fig. 1 and 2, a negative pressure tank 1-1 is divided into 7 compartments including 6 fan-shaped compartments and 1 circular compartment by a rectangular side barrier 1-3 and a circular side barrier 1-4. An outer sleeve 2-1 is arranged at a position which is 0.5-0.55 m away from the negative pressure barrel 1-1 in the circumferential direction, the outer sleeve 2-1 is of a structure with an open upper end and a closed bottom, and a plurality of round small holes are formed in the side wall.

With reference to fig. 2 and 7, the side surface of the outer sleeve 2-1 and the side surface of the negative pressure barrel 1-1 are welded by the side partition plate 2-2, the bottom of the outer sleeve 2-1 is welded with the bevel edge of the lower rib plate 2-4, one end of the right-angle edge of the lower rib plate 2-4 is welded on the side partition plate 2-2, the other end is welded on the negative pressure barrel 1-1, the area between the outer sleeve 2-1 and the negative pressure barrel 1-1 is called a blank area 2-3, and the blank area 2-3 is filled with sand with the same grading. The bottom is made into 45-degree oblique linkage, so that the resistance of the negative pressure barrel 1-1 in the mud feeding process can be reduced, the speed of the negative pressure barrel in the mud feeding process can be improved, and the influence of the external sleeve barrel 2-1 on the mud feeding of the negative pressure barrel 1-1 can be reduced. The working principle is as follows: the side surface of the outer sleeve barrel 2-1 is provided with a plurality of holes, sand and stone with the same grading are filled in the blank area 2-3, and when the negative pressure barrel 1-1 starts to be flushed by water flow, the holes and the sand and stone in the blank area 2-3 resist the flushing of the water flow, so that the lateral load bearing capacity is improved; sand around the outer sleeve barrel 2-1 can enter between the side walls through the side holes, so that the sand around the barrel and soil body is reinforced; the holes on the outer sleeve barrel 2-1 increase friction between soil and the barrel body, and improve lateral friction between the barrel and surrounding soil.

As shown in FIG. 8, the levelness adjusting mechanism 3 comprises a round flat plate 3-1, a rotating rod 3-2, a first rotating shaft 3-3, a second rotating shaft 3-4, a connecting rod 3-5, a hydraulic rod 3-6, a supporting frame 3-7, a direction limiter 3-2-1 and a buffer rubber 3-2-2, wherein the round flat plate 3-1 is connected with the rotating rod 3-2 through the first rotating shaft 3-3, the rotating rod 3-2 is connected with the connecting rod 3-5 through the second rotating shaft 3-4, the connecting rod 3-5 is welded to the top end of the hydraulic rod 3-6, the hydraulic rod 3-6 is sleeved on the supporting frame 3-7 and welded, and the supporting frame 3-7 is directly welded to the trapezoid table 1-6.

As shown in fig. 9 and 10, a direction limiter 3-2-1 is welded on the rotating rod 3-2 near the top end of the negative pressure barrel 1-1, the direction limiter 3-2-1 prevents the rotating rod from rotating upwards and gives the rotating rod 3-2-1 an initial downward angle, so that the round flat plate 3-1 moves downwards more easily, and buffer rubber 3-2-2 is attached to the connecting position of the direction limiter 3-2-1 and the connecting rod 3-5 to protect the direction limiter 3-2-1 from being extruded excessively. The working mode is as follows: after the settlement of the negative pressure barrel 1-1 is finished, a leveling instrument is used for measuring the levelness of the pile top, if the levelness meets the requirement, the soil body displacement detection part 1-7 is used for measuring displacement and recording data in the control system 4, if the levelness measured by the leveling instrument does not meet the requirement, the control system 4 controls the hydraulic pressure of the hydraulic rods 3-6 in each fan-shaped compartment, the connecting rods 3-5 are pushed, then the rotating rods 3-2 rotate downwards around the rotating shafts 2-4, the round flat plate 3-1 at the first rotating shaft 3-3 begins to press the soil body downwards, the inclination of the negative pressure barrel is adjusted through the interaction force of the round flat plate 3-1 and the soil body, the levelness of the negative pressure barrel meets the requirement, the soil body displacement detection part 1-7 is used for measuring the displacement of the soil body according to the barrel top and recording the data in the control system 4, and thereafter, the soil body displacement detection part 1-7 is used for detecting the displacement of the soil body to the barrel top in real time and comparing the data recorded in the control system 4, if deviation occurs, the control system 4 timely controls the hydraulic rods 3-6 to adjust the soil body so that the soil body does not collapse caused by excessively large eccentric load.

step one: when the negative pressure barrel begins to sink in construction, the soil body displacement detecting piece begins to detect, the control system calculates the average value of the displacement of the soil body in the fan-shaped compartment from the top of the barrel through the soil body displacement detecting piece, and then adjusts the displacement of the whole negative pressure barrel in the sinking process through the difference value of the displacement of the six fan-shaped compartments from the top of the barrel, so that the negative pressure barrel meets the requirements in the sinking process, and the inclination in the sinking process is prevented.

Step two: after sinking is finished, sand with the same soil layer grading is filled between the outer sleeve and the negative pressure barrel, when the negative pressure barrel is flushed by water flow, on one hand, the pile side friction force on the periphery of the barrel is increased by the outer sleeve with multiple holes, the horizontal bearing capacity of the barrel is improved, on the other hand, the sand in the blank area can also reduce the flushing of the barrel by water flow by means of partial wave force of water flow offset by the holes by the outer sleeve with multiple holes, and when the water flow is flushed by the barrel, partial sand outside the sleeve can enter the blank area through the holes, so that the sand on the periphery of the negative pressure barrel is always kept in a certain amount and cannot be flushed by the water flow.

Step three: after sedimentation is finished, if the levelness of the barrel top does not meet the requirement, a hydraulic command is implemented to the hydraulic device through the control center, the hydraulic rod pushes the connecting rod to move towards the horizontal direction, the rotating rod rotates through the rotating shaft, the round flat plate moves downwards, the levelness of the barrel top is adjusted within the allowable error range through acting force and reacting force between soil and the round flat plate, and the negative pressure barrel foundation is prevented from being subjected to larger eccentric load.

The invention can avoid the inclination of the negative pressure barrel in the sinking process, and improve the accuracy of the sinking in the construction process and the safety of the construction process; after the sinking of the negative pressure barrel 1-1 by the outer sleeve barrel 2-1 is finished, the side load can be resisted by improving the pile side friction resistance between the sand and the outer sleeve barrel 2-1 and the connection between the reinforced soil and the sand of the outer sleeve barrel 2-1, so that the scouring ability for resisting water flow is improved; when the levelness of the negative pressure barrel 1-1 after the sinking is finished does not meet the requirement, the levelness adjusting mechanism 3 can adjust the vertical displacement of the negative pressure barrel 1-1 in a small amplitude through the interaction of the round flat plate 3-1 and the soil body, and the negative pressure barrel is prevented from tilting. The invention can avoid the negative pressure barrel from tilting during the construction and the use process of the negative pressure barrel, and reduce the occurrence of wind power accidents at sea.

The soil body displacement detection part compares the displacement of each fan-shaped compartment through the control system in the sinking process of the negative pressure barrel, and when a certain displacement difference occurs in the fan-shaped compartment due to the displacement of the soil body from the barrel top, the sinking speed and displacement of the negative pressure barrel are controlled by adjusting the negative pressure of the suction pump on the butt joint pipe; the outer sleeve can resist side loads through its structure; when the water level of the barrel top of the negative pressure barrel after settlement is finished is not met through level gauge measurement, the water level of the negative pressure barrel is adjusted through the difference of acting forces of hydraulic rods in all fan-shaped cabins controlled by a control system, the water level is met, the displacement of the soil body displacement detection part from the barrel top is recorded through the control system, when the displacement of the soil body displacement detection part from the barrel top is changed compared with the previous recorded data, the water level is adjusted timely through the hydraulic rods by the control system.

Claims

1. An anti-scouring and levelness adjusting device for an offshore wind power negative pressure barrel is characterized in that: the device comprises a negative pressure barrel (1-1), a sinking inclination detection mechanism (1), a water-flow flushing mechanism (2), a levelness adjustment mechanism (3), a control system (4), a tower barrel (5) and a butt joint pipe (6), wherein the sinking inclination detection mechanism (1) is arranged inside the negative pressure barrel (1-1) and divides the interior of the negative pressure barrel into a plurality of independent compartments, the whole body formed by the sinking inclination detection mechanism and the butt joint pipe is arranged inside the water-flow flushing mechanism (2), the water-flow flushing mechanism, the tower barrel (5) and the water-flow flushing mechanism are coaxially arranged, the cover of the tower barrel (5) is fixedly arranged above the three, the control system (4) is arranged on the tower barrel (5), the outer wall of the negative pressure barrel (1-1) is fixedly connected with the water-flow flushing mechanism (2), each compartment inside the negative pressure barrel (1-1) is respectively provided with one levelness adjustment mechanism (3), each levelness adjustment mechanism (3) is respectively connected with the sinking inclination detection mechanism (1), each butt joint pipe (6) is vertically arranged at intervals and is communicated with the corresponding compartment, each butt joint pipe (6) is respectively connected with the sinking pump (1) and the levelness adjustment mechanism (4); the sinking inclination detection mechanism (1) comprises a support component (1-2), a rectangular partition plate (1-3), a round partition plate (1-4), a cross brace (1-5), a trapezoid table (1-6) and a soil body displacement detection piece (1-7), wherein the round partition plate (1-4) is arranged in the middle of a negative pressure barrel (1-1), the bottom end of the round partition plate is coaxially fixed with the negative pressure barrel (1-1), the middle of the negative pressure barrel (1-1) is divided into a round independent partition, the rectangular partition plate (1-3) is provided with six blocks at intervals between the round partition plate (1-4) and the negative pressure barrel (1-1), the annular wall between the round partition plate and the round partition plate is equally divided into six fan-shaped independent partition plates, two sides of the rectangular partition plate (1-3) are respectively fixed with the outer wall of the round partition plate (1-4) and the inner wall of the negative pressure barrel (1-1), one support component (1-2) is arranged in each partition plate, the support component (1-2) is a round independent partition plate formed by dividing the middle of the negative pressure barrel (1-1) into a round rectangular tubular partition plate, the rectangular partition plate is welded with the round partition plate (1-1) and the outer wall of the trapezoid table (1-1) and the inner wall of each trapezoid table (1-1) is respectively fixed with the round partition plate (1-6), the soil body displacement detection part (1-7) is arranged on the trapezoid table (1-6) through the cross braces (1-5), and the levelness adjustment mechanism (3) is arranged in the support assembly (1-2) and is sequentially connected with the six trapezoid tables (1-6); the levelness adjustment mechanism (3) comprises a round flat plate (3-1), a rotating rod (3-2), a first rotating shaft (3-3), a second rotating shaft (3-4), connecting rods (3-5), hydraulic rods (3-6) and supporting frames (3-7), wherein the round flat plate (3-1) is arranged on the upper portion of the negative pressure barrel (1-1) and is close to the tower barrel (5), a plurality of rotating rods (3-2) are arranged at circumferential intervals of the round flat plate (3-1), one end of each rotating rod (3-2) is hinged to the peripheral surface of the round flat plate (3-1) through the first rotating shaft (3-3), the other end of each rotating rod is respectively hinged to one connecting rod (3-5) through the second rotating shaft (3-4), each connecting rod (3-5) is respectively connected with one hydraulic rod (3-6), each hydraulic rod (3-6) is respectively arranged on the sinking inclination detection mechanism (1) through one supporting frame (3-7), and the hydraulic rods (3-6) are in signal connection with the control system (4).

2. The offshore wind turbine negative pressure bucket scour prevention and levelness adjustment device of claim 1, wherein: the soil body displacement detection piece (1-7) comprises a laser emitter (1-7-3) and a laser receiver (1-7-4), the laser emitter and the laser receiver are respectively arranged at one end of the inserting piece, the cross brace (1-5) is fixed in the trapezoid table (1-6), a groove is formed in the laser emitter, a plurality of clamping blocks I are arranged on one inner side face of the groove at intervals through a plurality of upper locking springs (1-7-1), a plurality of clamping blocks II are arranged on the other inner side face at intervals through a plurality of lower locking springs (1-7-2), a plurality of notches are correspondingly formed in two opposite sides of the inserting piece, the inserting piece is inserted into the groove and is connected to the cross brace (1-5) through the clamping blocks I and the clamping blocks II, and the laser emitter (1-7-3) and the laser receiver (1-7-4) are respectively connected with a control system (4) through signals.

3. The offshore wind turbine negative pressure bucket scour prevention and levelness adjustment device of claim 1, wherein: the waterproof flushing mechanism (2) comprises an outer sleeve (2-1), side separation plates (2-2) and lower rib plates (2-4), wherein the negative pressure barrel (1-1) is coaxially arranged in the outer sleeve (2-1), a hollow area (2-3) is arranged between the negative pressure barrel and the outer wall of the negative pressure barrel (1-1), the outer wall of the negative pressure barrel and the inner wall of the outer sleeve (2-1) are fixed through a plurality of side separation plates (2-2) arranged at intervals, the lower rib plates (2-4) are of annular structures, the cross section of each lower rib plate is of an isosceles right triangle, a circle of inclined 45-degree protrusions are arranged at the bottom edge of the inner wall of the outer sleeve (2-1), the inclined edges of the lower rib plates (2-4) are fixed with the bottom of the outer sleeve (2-1), the two right-angle edges are respectively fixed with the bottom edges of the side separation plates (2-2), the outer wall of the negative pressure barrel (1-1), a plurality of holes are distributed on the outer peripheral surface of the outer sleeve (2-1), and the hollow area (2-3) is filled with a mixture of sand and crushed stone with the same grade as the outer sleeve.

4. The offshore wind turbine negative pressure bucket scour prevention and levelness adjustment device of claim 3, wherein: the space between the negative pressure barrel (1-1) and the external sleeve barrel (2-1) is 0.5-0.55 m.

5. The offshore wind turbine negative pressure bucket scour prevention and levelness adjustment device of claim 1, wherein: the levelness adjusting mechanism (3) further comprises a direction limiter (3-2-1) and buffer rubber (3-2-2), the direction limiter (3-2-1) comprises two limiting blocks, the connecting part of the rotating rod (3-2) and the connecting rod (3-5) is installed on the upper side of the end part of the rotating rod (3-2) at a relatively parallel interval, the buffer rubber (3-2-2) is fixed on the upper side of the corresponding end part of the connecting rod (3-5), and the side surfaces of the two limiting blocks are respectively propped against the buffer rubber (3-2-2).

6. An operation method of the anti-scouring and levelness adjusting device of the offshore wind power negative pressure bucket according to any one of claims 1 to 5, which is characterized by comprising the following steps:

step one: the suction pump pumps air to each compartment through the connecting pipe, so that negative pressure is formed in the negative pressure barrel, the negative pressure barrel begins to construct sinking, the sinking inclination detection mechanism begins to detect, the control system calculates the average value of the displacement of soil bodies in the fan-shaped compartments from the top of the barrel through feedback information of the sinking inclination detection mechanism, and then the displacement of the whole negative pressure barrel in the sinking process is regulated through the difference value of the average value of the displacement of the soil bodies in each compartment from the top of the barrel, so that the negative pressure barrel meets the requirement in the sinking process, and the inclination in the sinking process is prevented;

step three: after the negative pressure barrel reaches a designated position, when the levelness of the barrel top does not meet the requirement, a control system sends an instruction to the levelness adjusting mechanism, the levelness adjusting mechanism on the corresponding compartment receives the instruction, the filler in the negative pressure barrel is extruded, the levelness of the barrel top of the negative pressure barrel is adjusted within an error allowable range through acting force and reacting force, and eccentric load born by a negative pressure barrel foundation is eliminated.