An installation platform for offshore wind power

Abstract

The application relates to the technical field of offshore wind power construction platforms, and discloses an installation platform for offshore wind power, which comprises a bearing platform, a plurality of groups of support seats are fixedly connected to the bearing platform, and the inner walls of the plurality of groups of support seats are slidably connected with pile columns; the limiting block is embedded into the positioning groove to clamp the pressurizing pipe, so that the rotation of the pressurizing pipe can be limited; when the filter screen is blocked, the flow of seawater through the filter screen will decrease; at this time, with the rising of the piston disc, the negative pressure in the center hole will become larger and larger, so that the limiting block overcomes the tension of the spring and is retracted into the clamping groove, is pulled out of the positioning groove, and the corresponding pressurizing pipe is released from the limiting, so that the intermittent dredging mechanism can normally operate, thereby achieving the purpose of automatic cleaning according to the pressure change of the center hole, and avoiding the problem that when the filter screen is not blocked, the intermittent dredging mechanism still operates uninterruptedly, causing the wear of components and affecting the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore wind power construction platform, and particularly relates to an installation platform for offshore wind power. BACKGROUND

[0002] When the buoyancy-assisted lifting pile of the offshore wind power installation ship sucks in seawater, various foreign matters such as shells, algae and marine organisms exist in the marine environment. When the pile sucks in seawater, these foreign matters may enter the water inlet along with the water flow. The blockage of the water inlet will hinder the normal entry of seawater into the pile, affecting the work of the buoyancy-assisted system. The pile cannot increase its own weight by sucking in seawater, and the power of sinking is insufficient, which slows down the sinking speed, and even may completely stop sinking, and increases the internal pressure of the pile. During the sinking process of the pile, if the water inlet is blocked, the air in the pile cannot be normally discharged, and as the pile continuously sinks, the external seawater pressure increases, which will increase the internal pressure of the pile. The excessive internal pressure may cause damage to the structure of the pile, such as deformation of the pile, cracking of the weld, etc., and may affect the stability of the pile. Due to the blockage of the water inlet, the pile may not uniformly suck in seawater, which may cause the pile to tilt or sway during the sinking process, affecting its stability. This not only increases the construction difficulty, but also may pose a threat to the safety of surrounding construction equipment and personnel. The buoyancy-assisted lifting pile usually has a grid / filter preposition design, that is, a detachable metal grid or a high polymer filter is arranged at the front end of the water inlet to intercept large-particle foreign matters such as silt, gravel, marine debris, etc., or a plurality of dispersed water inlets are arranged to replace the traditional single water inlet with a plurality of small-diameter water inlets uniformly distributed along the circumference of the pile. Even if part of the water inlets are blocked, the remaining ones can still normally suck in water, avoiding the problem of "single-point blockage and failure".

[0003] As prior art publication number "CN116084371B", provides a kind of offshore wind power installation platform, it is related to offshore wind power technical field, the present application includes installation platform, the lower surface of installation platform is fixedly connected with several ring array arrangement supports, the lower end of each support is fixedly connected with end, the lower end of end is fixedly connected with the cylinder that is communicated, the inside of cylinder is sequentially provided with lower filter grid, middle filter grid and upper filter grid from bottom to top, the middle of lower filter grid and the periphery of middle filter grid are all provided with mouth;The side of end is provided with suction port, the side of several end is provided with multistage blocking piece at the place of upper near suction port.This installation platform can avoid the problem that the position between cylinder collapses too seriously when being arranged in sea, also can prevent stone accumulation in the lower end of cylinder, and cause the problem of unstable use in later period to occur.But when different areas filter grid is blocked by seabed soil or sundries in actual use, still need to be cleaned and maintained regularly, otherwise the accumulation of blockage is too much still can lead to blockage failure, and in the area of more foreign matter in seawater, it can appear that foreign matter blocks water inlet in short time, lead to pile column cannot pass through suction seawater to increase its weight, the power of sinking is insufficient, lead to sinking speed slow down, even possibly completely stop sinking operation condition. SUMMARY

[0004] The purpose of the present application is to provide an installation platform for offshore wind power to solve the above problems and overcome the defects of the prior art, as described in detail below.

[0005] To solve the problems raised in the background art, the present application uses the following technical solutions:

[0006] The application provides an offshore wind power installation platform, which comprises a bearing platform, a plurality of groups of support seats are fixedly connected to the bearing platform, and the inner walls of the plurality of groups of support seats are slidably connected with pile columns, the bottom of each pile column is fixedly connected with a pile shoe, a central hole is formed in the inner wall of each pile column, and the central hole penetrates the inner wall of the pile shoe, the bottom of the pile shoe is fixedly connected with a fence seat, a filter screen is fixedly connected to the position of the central hole at the bottom of the pile shoe, and the filter screen can intercept sundries such as silt, gravel and marine organism debris carried by seawater; the fence seat can intercept larger sundries, so that the filter screen can be effectively prevented from being directly contacted or impacted by some larger sundries, the filter screen is damaged and the filtering effect is affected, an intermittent dredging mechanism is arranged in the pile shoe and used for intermittently cleaning the filter screen, the intermittent dredging mechanism comprises a first support ring, the first support ring is fixedly connected to the inner wall of the central hole, a pressurizing pipe is rotatably connected to the inner wall of the first support ring, a pressurizing bin is fixedly connected to the lower portion of the pressurizing pipe, a pressurizing piston rod is axially slidably connected to the inner wall of the pressurizing pipe, a pressurizing disc is fixedly connected to the bottom of the pressurizing piston rod, a one-way valve is fixedly connected to the inner wall of the pressurizing disc, a backflushing head is fixedly connected to the bottom of the pressurizing bin, a one-way valve is fixedly connected to the inner wall of the backflushing head, an extruding pipe is fixedly connected to the top of the pressurizing pipe, extruding plugs are axially slidably connected to the inner wall of the extruding pipe at both sides, a guide ring is fixedly connected to the inner wall of the central hole, guide rollers are rotatably connected to the ends of the extruding plugs away from the extruding pipe, and the guide rollers are rollingly connected to the inner wall of the guide ring, and a blade wheel is fixedly connected to the outer wall of the pressurizing bin.

[0007] As preferred, two groups of backflushing discs are fixedly connected to the backflushing head, the two groups of backflushing discs are respectively arranged at positions of the outer wall of the backflushing head and opposite surfaces of the filter screen, and water outlet holes in the backflushing discs are fixedly connected with nozzles.

[0008] As preferred, a support column is fixedly connected to the inner wall of the central hole at a position above the extruding pipe, a linear motor is fixedly connected to the top of the support column, a piston disc is slidably connected to the inner wall of the central hole, the piston disc is fixedly connected with a mover of the linear motor, and a pressure relief valve is arranged on the piston disc.

[0009] As preferred, a clamping groove is formed in the inner wall of the first support ring, a limiting block is slidably connected to the inner wall of the clamping groove, and a spring is fixedly connected between the clamping groove and the limiting block.

[0010] As preferred, a plurality of tooth grooves are formed in the outer wall of the pile column, a plurality of gears are rotatably connected to the inner wall of the support seat, the gears are matched with the tooth grooves, a plurality of drive assemblies for driving the gears are arranged in the support seat, and a brake assembly is arranged on the top of the support seat and corresponds to each gear.

[0011] Preferably, the brake assembly comprises a slide fixedly connected to the top of the support base, an inner wall of the slide being slidably connected with an inclined push block, an inclined surface of the inclined push block being slidably connected with a brake rack, the brake rack being matched with a tooth groove.

[0012] Preferably, a dovetail block fixedly connected to the inclined push block is slidably connected in a dovetail groove formed in the brake rack, an inner wall of the slide being fixedly connected with a hydraulic cylinder for pushing the inclined push block to slide, a bottom of an inner wall of the dovetail groove being formed with a containing groove, the containing groove and the dovetail block being fixedly connected with a spring.

[0013] Preferably, an outer wall of the pile shoe is rotatably connected with a plurality of groups of rotating rings, an outer wall of the rotating ring being formed with a plurality of inclined holes arranged in a ring shape, an inner wall of the inclined hole being fixedly connected with a spray head, a ring of the inclined holes being communicated with the central hole through a ring groove formed in an inner wall of the rotating ring.

[0014] Preferably, an inner wall of the tooth groove is formed with a plurality of water spray holes, an inner wall of the water spray hole being fixedly connected with a spray head.

[0015] Preferably, the spray head comprises a cone head cylinder, an inner wall of the cone head cylinder being fixedly connected with a second support ring, an inner wall of the second support ring being slidably connected with a pull plug, one end of the pull plug inside the cone head cylinder being fixedly connected with a limiting block, the limiting block and the second support ring being fixedly connected with a spring.

[0016] Beneficial effects are that:

[0017] When the pile needs to sink, the sea water is sucked through the bottom of the central hole, the potential energy generated by the flow of the sea water drives the impeller to rotate through the position of the impeller, thereby driving the extrusion plug in the extrusion pipe above to rotate together, when the guide roller moves to the convex position inside the guide ring each time, the extrusion plugs on both sides of the extrusion pipe are pushed, the medium in the extrusion pipe is extruded into the pressure pipe, thereby pushing the pressure disc below the pressure piston rod to extrude the sea water in the pressure chamber, so that the sea water is sprayed from the backflushing disc of the backflushing head, due to the inclined water outlet of the backflushing disc, the reaction force generated when the sea water is sprayed, makes the backflushing disc rotate, forming a rotating sea water jet for cleaning, so as to facilitate backflushing of the inner wall of the filter screen, and when the guide roller leaves the convex position inside the guide ring each time, the guide roller will pull the extrusion plugs on both sides of the extrusion pipe to stretch out, so that the negative pressure is generated in the extrusion pipe, thereby pulling the pressure piston rod in the pressure pipe to reset, driving the pressure disc to rise, and the sea water is replenished into the pressure chamber from the one-way valve of the pressure disc, so that the backflushing disc can continuously and intermittently flush the filter screen during the process of sucking the sea water through the central hole, thereby effectively avoiding the situation that the foreign matter blocks the filter screen and the pile cannot increase its own weight by sucking the sea water, resulting in the slow sinking speed.

[0018] Second, this invention uses a linear motor to drive the piston disc to lift and lower, which can expel or suck in seawater, thereby controlling and adjusting the buoyancy of the pile. The buoyancy offsets part of the pile weight, greatly reducing the load-bearing pressure of the mechanical lifting device.

[0019] Third, this invention uses a limiting block embedded in a positioning groove to hold the pressure tube in place, which can restrict the rotation of the pressure tube. When the filter screen is clogged, the negative pressure in the central hole will increase, causing the limiting block to overcome the tension of the spring and release the corresponding pressure tube limit, so that the intermittent unblocking mechanism can operate normally. This achieves the purpose of automatic cleaning according to the pressure change of the central hole, avoiding the problem of the intermittent unblocking mechanism continuing to operate without interruption when the filter screen is not clogged, which would cause component wear and affect its service life.

[0020] Fourth, the invention uses a rack and pinion brake, which increases the contact points with the pile and avoids excessive local stress, which could lead to component deformation or excessive wear. During braking, the relative positions of the tooth groove and the brake rack change frequently, which may result in the tooth groove and the brake rack failing to engage. However, the inclined push block and the brake rack are connected by an inclined surface sliding contact, which allows the brake rack that is not engaged with the tooth groove to gradually rise along the inclined surface of the inclined push block until it engages, thereby achieving the purpose of automatic adaptive engagement.

[0021] V. This invention, by setting several sets of rotating rings on the outer wall of the pile shoe, allows seawater to be discharged from the bottom of the central hole under pressure when the piston disc presses down and squeezes out seawater. This avoids the formation of a negative pressure zone between the bottom of the seawater and the soil. The seawater also enters the flow channel and is injected into the annular groove of each set of rotating rings, and is sprayed out from the inclined holes. This reduces the friction on the side of the pile shoe and the weight of the overlying backfill soil. Furthermore, since the jet from the inclined holes is inclined, its force will drive the rotating rings to rotate, which can further damage the structure of the soil layer on the side of the pile shoe, weaken its adsorption force, and reduce the burden on the pile during lifting. The pressure in the central hole forces the seawater to be ejected from the spray hole, which will generate a large impact force on the inner wall of the tooth groove. This will help to remove the mud, sand, shells, and marine organisms attached to the tooth groove during the pile operation on the seabed, preventing these residues from getting stuck at the meshing point of the gear and tooth groove during the ascent, which would cause gear skipping and reduce the accuracy of pile lifting. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of the overall appearance of the present invention;

[0024] Figure 2 is a structural diagram of the bearing platform and the support seat in the present application;

[0025] Figure 3 is a partial sectional view of the support seat in the present application;

[0026] Figure 4 is a partial sectional view of the brake assembly in the present application;

[0027] Figure 5 is a partial sectional view of the pile in the present application;

[0028] Figure 6 is an enlarged view of the area of the pile shoe in the present application; Figure 5

[0029] Figure 7 is a partial sectional view of the swivel ring in the present application;

[0030] Figure 8 is a partial sectional view of the tooth slot in the present application;

[0031] Figure 9 is an enlarged view of the area of A in the present application; Figure 8

[0032] Figure 10 is a structural diagram of the intermittent unblocking mechanism in the present application;

[0033] Figure 11 is a partial sectional view of the intermittent unblocking mechanism in the present application;

[0034] Figure 12 is an enlarged view of the area of C in the present application Figure 11

[0035] Figure 13 is a structural diagram of the guide ring in the present application;

[0036] Figure 14 is a partial sectional view of the nozzle in the present application.

[0037] ​​​The reference signs are explained as follows: 1, bearing platform; 2, support seat; 21, gear; 22, slide; 221, inclined push block; 222, brake rack; 223, hydraulic cylinder; 224, containing groove; 3, pile; 31, tooth groove; 311, water injection hole; 4, pile shoe; 41, rotating ring; 411, ring groove; 412, inclined hole; 42, flow channel; 5, center hole; 51, support column; 52, linear motor; 53, piston disc; 6, fence seat; 7, filter screen; 8, first support ring; 81, pressurizing pipe; 811, pressurizing piston rod; 82, pressurizing bin; 821, pressurizing disc; 822, impeller; 83, backflushing head; 831, backflushing disc; 84, extruding pipe; 841, extruding plug; 842, guide roller; 843, guide ring; 85, clamping groove; 86, limiting block; 87, positioning groove; 9, cone head cylinder; 91, second support ring; 92, pull plug; 93, limiting block. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described below in detail. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0039] Reference is made to Figure 1 - Figure 14As shown, the present application provides a kind of installation platform for offshore wind power, including bearing platform 1, and several groups of support seat 2 are fixedly connected on bearing platform 1, and the inner wall of several groups of support seat 2 is slidably connected with pile 3, the bottom of pile 3 is fixedly connected with pile shoe 4, the inner wall of pile 3 is provided with central hole 5, and central hole 5 penetrates the inner wall of pile shoe 4, central hole 5 is used to suck or discharge seawater to adjust its weight, the bottom of pile shoe 4 is fixedly connected with fence seat 6, for intercepting some larger foreign matters, the position of the bottom of pile shoe 4 in central hole 5 is fixedly connected with filter screen 7, filter screen 7 is used to intercept silt, rubble, marine organism debris and other foreign matters carried by seawater, fence seat 6 can intercept larger foreign matters, can effectively prevent some larger foreign matters from directly contacting or impacting filter screen 7, causing filter screen 7 to be damaged, affecting the effect of filtration, intermittent dredging mechanism is arranged in pile shoe 4, for intermittent cleaning filter screen 7, intermittent dredging mechanism includes first support ring 8, first support ring 8 is fixedly connected to the inner wall of central hole 5, the inner wall of first support ring 8 is rotatably connected with pressurizing pipe 81, pressurizing pipe 81 is fixedly connected with pressurizing bin 82 below, the inner wall of pressurizing pipe 81 is axially slidably connected with pressurizing piston rod 811, the bottom of pressurizing piston rod 811 is fixedly connected with pressurizing disc 821, the inner wall of pressurizing disc 821 is fixedly connected with one-way valve, one-way valve only allows liquid above pressurizing disc 821 to flow downward into pressurizing bin 82, the bottom of pressurizing bin 82 is fixedly connected with backflush head 83, the inner wall of backflush head 83 is fixedly connected with one-way valve, which has the effect of preventing reverse flow, the top of pressurizing pipe 81 is fixedly connected with extrusion pipe 84, the inner wall of extrusion pipe 84 is axially slidably connected with extrusion plug 841 on both sides, the inner wall of central hole 5 is fixedly connected with guide ring 843, the inner wall of guide ring 843 is symmetrically protruded inward on both sides, two groups of extrusion plugs 841 are rotatably connected with guide roller 842 respectively at the end away from extrusion pipe 84, and guide roller 842 is rollingly connected to the inner wall of guide ring 843, impeller 822 is fixedly sleeved to the outer wall of pressurizing bin 82, two groups of backflush disc 831 are fixedly connected to backflush head 83, and the two groups of backflush disc 831 are respectively located at the positions of the outer wall of backflush head 83 on the front and back surfaces of filter screen 7, and the water outlet hole of backflush disc 831 is fixedly connected with spray head, by arranging backflush disc 831 on the front and back surfaces of filter screen 7, the surface and side surface of disc-shaped filter screen 7 can be cleaned simultaneously, when pile 3 needs to sink, seawater is sucked through the bottom of central hole 5, seawater passes through the position of impeller 822, the potential energy generated by the flow of seawater drives impeller 822 to rotate, thereby driving impeller 822 to rotate, which drives pressurizing pipe 81 to rotate together with extrusion pipe 84 above, when extrusion pipe 84 rotates, it drives guide roller 842 connected with extrusion plug 841 to roll in guide ring 843, when guide roller 842 moves to the protrusion on the inner side of guide ring 843 each time, it pushes extrusion plug 841 on both sides of extrusion pipe 84, and extrusion plug 841 extrudes the medium in extrusion pipe 84 into pressurizing pipe 81,Thus, the pressing disc 821 below the pressing piston rod 811 is pushed to extrude the seawater in the pressing chamber 82, which is sprayed from the backflush disc 831 on the backflush head 83. Since the water outlet of the backflush disc 831 is inclined, the reaction force generated when the seawater is sprayed can make the backflush disc 831 rotate to form a rotating seawater jet for cleaning, so as to facilitate the backflushing of the inner wall of the filter screen 7. In addition, each time the guide roller 842 leaves the protrusion on the inner side of the guide ring 843, the guide roller 842 can pull the extrusion plugs 841 on both sides of the extrusion pipe 84 to extend, so that the negative pressure is generated in the extrusion pipe 84 to pull the pressing piston rod 811 in the pressing pipe 81 to reset, drive the pressing disc 821 to rise, and the seawater is replenished into the pressing chamber 82 from the one-way valve of the pressing disc 821, so that the backflush disc 831 can continuously and intermittently flush the filter screen 7 during the seawater suction of the central hole 5, thereby effectively avoiding the blockage of the filter screen 7 by foreign matters, and the situation that the pile column 3 cannot increase its weight by suction of seawater to slow down the sinking speed.

[0040] In the embodiment, please refer to Figure 5 The inner wall of the central hole 5 is fixedly connected with a support column 51 above the extrusion pipe 84, and the top of the support column 51 is fixedly connected with a linear motor 52. The stator and the rotor of the linear motor 52 are coated with a protective coating, which can be a polyurea coating. The polyurea coating has good waterproof performance, impact resistance and wear resistance, and has certain anti-bioadhesion ability. The inner wall of the central hole 5 is slidingly connected with a piston disc 53, and the piston disc 53 is fixedly connected with the rotor of the linear motor 52. The piston disc 53 is provided with a pressure relief valve, which can automatically release pressure when the pressure in the central hole 5 is too high, so as to avoid damage to the pile column 3. The piston disc 53 is driven by the linear motor 52 to ascend and descend, so as to discharge or suck seawater, thereby controlling and adjusting the buoyancy of the pile column 3. The buoyancy can offset part of the weight of the pile column 3, so as to greatly reduce the bearing pressure of the mechanical lifting device.

[0041] Further, please refer to Figure 5 、 Figure 6 、 Figure 10 、 Figure 11 、 Figure 12The inner wall of the first supporting ring 8 is provided with a clamping groove 85, the inner wall of the clamping groove 85 is slidably connected with a limiting block 86, a spring is fixedly connected between the clamping groove 85 and the limiting block 86, the outer wall of the pressurizing pipe 81 is provided with a positioning groove 87 at the position corresponding to the clamping groove 85, the pressurizing pipe 81 is clamped by embedding the limiting block 86 into the positioning groove 87, the rotation of the pressurizing pipe 81 can be limited, when the filter screen 7 is blocked, the flow of seawater through the filter screen 7 will decrease, at this time, with the rising of the piston disc 53, the negative pressure in the central hole 5 will become larger and larger, so that the limiting block 86 overcomes the tension of the spring and is retracted into the clamping groove 85, is pulled out of the positioning groove 87, the pressurizing pipe 81 is released from the limiting, so that the intermittent dredging mechanism can normally work, thereby achieving the purpose of automatic cleaning according to the pressure change of the central hole 5, avoiding the problem that when the filter screen 7 is not blocked, the intermittent dredging mechanism still works continuously, causing the wear of components and affecting the service life.

[0042] Further, referring to Figure 3 , the outer wall of the pile column 3 is provided with a plurality of tooth grooves 31, the inner wall of the supporting seat 2 is rotatably connected with a plurality of gear wheels 21, and the gear wheels 21 are matched with the tooth grooves 31, a plurality of drive assemblies for driving the gear wheels 21 are arranged in the supporting seat 2, the drive assembly is composed of a servo motor and a speed reducer, a brake assembly is arranged on the top of the supporting seat 2 corresponding to each gear wheel 21, the gear wheel 21 is rotated by the drive assembly, and the pile column 3 can be lifted when the gear wheel 21 rotates, so as to facilitate the adjustment of the height of the bearing platform 1.

[0043] In addition, referring to Figure 3 , Figure 4The brake assembly comprises a chute 22 fixedly connected to the top of the support base 2, the inner wall of the chute 22 is slidably connected with an inclined push block 221, the inclined surface of the inclined push block 221 is slidably connected with a brake rack 222, the brake rack 222 is matched with the tooth groove 31, the dovetail block fixedly connected to the inclined push block 221 is slidably connected in the dovetail groove of the brake rack 222, the inner wall of the chute 22 is fixedly connected with a hydraulic cylinder 223 for pushing the inclined push block 221 to slide, the bottom of the inner wall of the dovetail groove is provided with a containing groove 224, the spring is fixedly connected between the containing groove 224 and the dovetail block, the brake rack 222 is adopted to increase the contact points with the pile 3, so that the problem of local excessive force, component deformation or excessive wear is avoided, when braking, the hydraulic cylinder 223 pushes the inclined push block 221, the brake rack 222 is pressed by the inclined push block 221 and is close to the tooth groove 31 of the pile 3 to brake, but since the relative position of the tooth groove 31 and the brake rack 222 changes frequently, the tooth groove 31 and the brake rack 222 cannot be engaged, but since the inclined push block 221 and the brake rack 222 are connected in the inclined surface sliding mode, the surface of the pile 3 is resisted by the hydraulic cylinder 223 during the process of continuously extending the inclined push block 221, the brake rack 222 not engaged with the tooth groove 31 gradually rises along the inclined surface of the inclined push block 221 until engagement, so that the purpose of automatic adaptation and engagement is achieved.

[0044] In addition, please refer to Figure 5 、 Figure 6 、 Figure 7The outer wall of the pile shoe 4 is rotationally connected with a plurality of groups of swivel rings 41. The outer wall of the swivel ring 41 is provided with a plurality of inclined holes 412 arranged in a ring array. The inner wall of the inclined hole 412 is fixedly connected with a spray head. One circle of inclined holes 412 is communicated with the central hole 5 through a ring groove 411 formed in the inner wall of the swivel ring 41. In addition to the resistance including the self weight of the pile column 3, the suction force between the seabed soil and the pile shoe 4 also needs to be overcome when the pile column 3 is pulled out. If the seabed stratum is complex and loose, the pile column 3 may be inserted into the mud too deep when the platform is inserted into the pile, and the soil destroyed by the insertion is re-slurried and backfilled to form new attached soil. After a long time of consolidation, the attached soil has a certain strength, which may cause excessive pulling-out resistance and difficulty in pulling out the pile. By arranging a plurality of groups of swivel rings 41 on the outer wall of the pile shoe 4, when the piston disc 53 is pressed to squeeze out seawater, the pressure in the central hole 5 is increased. Under the action of the pressure, seawater is discharged from the bottom of the central hole 5, so that a negative pressure area is avoided between the bottom and the soil. Seawater also enters the flow channel 42 and is injected into the ring groove 411 of each group of swivel rings 41, and is sprayed from the inclined hole 412. The friction on the side of the pile shoe 4 and the weight of the overlying backfill soil can be reduced. In addition, the jet flow sprayed from the inclined hole 412 is inclined, which can further damage the structure of the soil layer on the side of the pile shoe 4, weaken the suction force, and reduce the burden of lifting the pile column 3.

[0045] It is worth noting that, please refer to Figure 8 、 Figure 9 The inner wall of the tooth groove 31 is provided with a plurality of water injection holes 311. The inner wall of the water injection hole 311 is fixedly connected with a spray head. When the piston disc 53 is pressed to squeeze out seawater, the pressure in the central hole 5 forces seawater to be sprayed from the water injection hole 311, which generates a large impact force on the inner wall of the tooth groove 31. The mud, shells and marine organisms attached in the tooth groove 31 during the operation of the pile column 3 on the seabed can be stripped, so that these residues are not stuck in the meshing position of the gear wheel 21 and the tooth groove 31 during the lifting process, and the problem of gear wheel 21 skipping teeth and causing the lifting accuracy of the pile to decrease is avoided.

[0046] It is worth noting that, please refer to Figure 14 The spray head comprises a cone head cylinder 9. The inner wall of the cone head cylinder 9 is fixedly connected with a second support ring 91. The inner wall of the second support ring 91 is slidingly connected with a pull plug 92. One end of the pull plug 92 inside the cone head cylinder 9 is fixedly connected with a limiting block 93. The position between the limiting block 93 and the second support ring 91 is fixedly connected with a spring. By arranging the pull plug 92 in cooperation with the cone head cylinder 9, the spray head can function as a one-way valve to prevent foreign matter carried by seawater from flowing into the spray head and damaging the spray head and its pipeline when the spray head is not in use.

[0047] Working principle

[0048] In use, the driving assembly drives the gear 21 to rotate, and the gear 21 can drive the pile 3 to rise and fall to facilitate the adjustment of the height of the bearing platform 1. The linear motor 52 drives the piston disc 53 to rise and fall to discharge or suck seawater, thereby controlling the buoyancy of the pile 3 to offset part of the weight of the pile 3. When the pile 3 needs to sink, the linear motor 52 drives the piston disc 53 to lift to generate negative pressure in the central hole 5 to facilitate the suction of seawater from the bottom of the central hole 5. When the seawater passes the position of the impeller 822, the potential energy generated by the flow of seawater drives the impeller 822 to rotate, thereby driving the impeller 822 connected to the pressurizing pipe 81 to rotate, so that the pressurizing pipe 81 rotates with the upper extrusion pipe 84. When the extrusion pipe 84 rotates, the guide roller 842 connected to the extrusion plug 841 rolls in the guide ring 843. When the guide roller 842 moves to the protrusion on the inner side of the guide ring 843 each time, it pushes the extrusion plugs 841 on both sides of the extrusion pipe 84 to extrude the medium in the extrusion pipe 84 into the pressurizing pipe 81, thereby pushing the pressurizing disc 821 below the pressurizing piston rod 811 to extrude the seawater in the pressurizing chamber 82, so that it is sprayed from the backflushing disc 831 on the backflushing head 83. Since the water outlet of the backflushing disc 831 is inclined, the reaction force generated when the seawater is sprayed makes the backflushing disc 831 rotate to form a rotating seawater jet for cleaning, thereby facilitating the backflushing of the inner wall of the filter screen 7. Moreover, when the guide roller 842 moves away from the protrusion on the inner side of the guide ring 843 each time, the guide roller 842 pulls the extrusion plugs 841 on both sides of the extrusion pipe 84 to extend, so that negative pressure is generated in the extrusion pipe 84 to pull the pressurizing piston rod 811 in the pressurizing pipe 81 to reset, thereby driving the pressurizing disc 821 to rise, and seawater is replenished into the pressurizing chamber 82 from the one-way valve of the pressurizing disc 821, so that the backflushing disc 831 can continuously and intermittently flush the filter screen 7 during the suction of seawater in the central hole 5, thereby effectively preventing foreign matter from blocking the filter screen 7. By embedding the limiting block 86 into the positioning groove 87 to clamp the pressurizing pipe 81, the rotation of the pressurizing pipe 81 can be limited. When the filter screen 7 is blocked, the flow of seawater through the filter screen 7 will decrease. At this time, as the piston disc 53 rises, the negative pressure in the central hole 5 will become larger and larger, so that the limiting block 86 overcomes the tension of the spring, shrinks into the clamping groove 85, and is pulled out of the positioning groove 87, thereby releasing the limiting of the corresponding pressurizing pipe 81, so that the intermittent dredging mechanism can normally operate, thereby achieving the purpose of automatic cleaning according to the pressure change of the central hole 5, avoiding the problem that the intermittent dredging mechanism still operates continuously when the filter screen 7 is not blocked, thereby affecting the service life of the components. When the piston disc 53 is pressed to extrude seawater, the pressure in the central hole 5 increases, and under the action of the pressure, seawater is discharged from the bottom of the central hole 5 to avoid the formation of a negative pressure area between the bottom of the central hole 5 and the soil. The seawater also enters the flow channel 42 and is injected into the ring groove 411 of each rotating ring 41 and is sprayed from the inclined hole 412 to reduce the friction on the side of the pile shoe 4 and the weight of the overlying backfill soil body. Moreover, since the jet from the inclined hole 412 is inclined,The force will push the rotating ring 41 to rotate, which can further destroy the structure of the soil layer on the side of the pile shoe 4, weaken its adsorption force, reduce the burden when the pile column 3 is lifted, and when the piston disc 53 is pressed to extrude seawater, the pressure in the central hole 5 will force seawater to be sprayed out of the water jet hole 311, which will generate a large impact force on the inner wall of the tooth groove 31, so as to peel off the mud, shells, and marine organisms attached in the tooth groove 31 when the pile column 3 is working on the seabed. When braking, the hydraulic cylinder 223 pushes the inclined push block 221, and the brake rack 222 will be close to the tooth groove 31 of the pile column 3 under the extrusion of the inclined push block 221, and the braking is performed. However, since the relative position of the tooth groove 31 and the brake rack 222 changes frequently, the tooth groove 31 and the brake rack 222 may not be able to engage. However, since the inclined push block 221 and the brake rack 222 are connected by sliding connection of the inclined surface, during the continuous extension of the hydraulic cylinder 223 to push the inclined push block 221, the surface of the pile column 3 is resisted, so that the brake rack 222 that is not engaged with the tooth groove 31 gradually rises along the inclined surface of the inclined push block 221 until it is engaged, thereby achieving the purpose of automatic adaptive engagement.

[0049] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An installation platform for offshore wind power, comprising a support platform (1), characterized in that, The bearing platform (1) is fixedly connected to several sets of support seats (2), and the inner walls of the several sets of support seats (2) are slidably connected to piles (3). The bottom of the piles (3) is fixedly connected to a pile shoe (4). The inner wall of the piles (3) is provided with a central hole (5), and the central hole (5) penetrates the inner wall of the pile shoe (4). The bottom of the pile shoe (4) is fixedly connected to a fence seat (6), and the bottom of the pile shoe (4) is fixedly connected to a filter screen (7) at the position of the central hole (5). The pile shoe (4) is equipped with an intermittent dredging mechanism for intermittently cleaning the filter screen (7). The intermittent unblocking mechanism includes a first support ring (8), which is fixedly connected to the inner wall of the central hole (5). A pressurizing pipe (81) is rotatably connected to the inner wall of the first support ring (8). A pressurizing chamber (82) is fixedly connected below the pressurizing pipe (81). A pressurizing piston rod (811) is axially slidably connected to the inner wall of the pressurizing pipe (81). A pressurizing plate (821) is fixedly connected to the bottom of the pressurizing piston rod (811). A one-way valve is fixedly connected to the inner wall of the pressurizing plate (821). A backflushing valve is fixedly connected to the bottom of the pressurizing chamber (82). The head (83) has a one-way valve fixedly connected to its inner wall, and a squeezing tube (84) fixedly connected to the top of the pressurizing tube (81). Squeezing plugs (841) are axially slidably connected to both sides of the inner wall of the squeezing tube (84). A guide ring (843) is fixedly connected to the inner wall of the center hole (5). A guide roller (842) is rotatably connected to the end of the two sets of squeezing plugs (841) away from the squeezing tube (84), and the guide roller (842) is rolled on the inner wall of the guide ring (843). An impeller (822) is fixedly sleeved on the outer wall of the pressurizing chamber (82). Two sets of backflush discs (831) are fixedly connected to the backflush head (83), and the two sets of backflush discs (831) are respectively located on the outer wall of the backflush head (83) and on the front and back sides of the filter screen (7), and a nozzle is fixedly connected to the inner wall of the water outlet hole of the backflush disc (831).

2. The offshore wind power installation platform according to claim 1, characterized in that: A support column (51) is fixedly connected to the inner wall of the central hole (5) above the extrusion tube (84). A linear motor (52) is fixedly connected to the top of the support column (51). A piston disc (53) is slidably connected to the inner wall of the central hole (5). The piston disc (53) is fixedly connected to the mover of the linear motor (52). A pressure relief valve is provided on the piston disc (53).

3. The offshore wind power installation platform according to claim 1, characterized in that: The inner wall of the first support ring (8) is provided with a slot (85), and the inner wall of the slot (85) is slidably connected to a limit block (86). A spring is fixedly connected between the slot (85) and the limit block (86). The outer wall of the pressure tube (81) is provided with a positioning groove (87) corresponding to the position of the slot (85).

4. The offshore wind power installation platform according to claim 3, characterized in that: The outer wall of the pile (3) is provided with several toothed grooves (31), and the inner wall of the support base (2) is rotatably connected with several gears (21), and the gears (21) cooperate with the toothed grooves (31). The support base (2) is provided with several sets of drive components for driving the gears (21), and the top of the support base (2) is provided with a braking component corresponding to each gear (21).

5. The offshore wind power installation platform according to claim 4, characterized in that: The braking assembly includes a slide (22), which is fixedly connected to the top of the support base (2). An inclined push block (221) is slidably connected to the inner wall of the slide (22). The inclined surface of the inclined push block (221) is slidably connected to the brake rack (222), and the brake rack (222) is engaged with the tooth groove (31).

6. The offshore wind power installation platform according to claim 5, characterized in that: The dovetail block fixedly connected to the inclined push block (221) is slidably connected to the dovetail groove opened on the brake rack (222). A hydraulic cylinder (223) is fixedly connected to the inner wall of the slide (22) for pushing the inclined push block (221) to slide. A receiving groove (224) is opened at the bottom of the inner wall of the dovetail groove. A spring is fixedly connected between the receiving groove (224) and the dovetail block.

7. The offshore wind power installation platform according to claim 1, characterized in that: The outer wall of the pile shoe (4) is rotatably connected to several sets of rotating rings (41). The outer wall of the rotating ring (41) is provided with several oblique holes (412) arranged in a ring array. The inner wall of the oblique holes (412) is fixedly connected to a nozzle. A ring of the oblique holes (412) is connected through a ring groove (411) opened on the inner wall of the rotating ring (41). The ring groove (411) is connected to the central hole (5) through a flow channel (42).

8. The offshore wind power installation platform according to claim 4, characterized in that: The inner wall of the tooth groove (31) is provided with a plurality of water spray holes (311), and a nozzle is fixedly connected to the inner wall of the water spray holes (311).

9. The offshore wind power installation platform according to claim 8, characterized in that: The nozzle includes a conical cylinder (9), a second support ring (91) is fixedly connected to the inner wall of the conical cylinder (9), a pull plug (92) is slidably connected to the inner wall of the second support ring (91), a limit block (93) is fixedly connected to one end of the pull plug (92) inside the conical cylinder (9), and a spring is fixedly connected between the limit block (93) and the second support ring (91).

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