48 results about "Splash zone" patented technology

The invention discloses a corrosion-resistant offshore wind power FRP-steel composite tower tube structure multi-objective optimization design method. The method comprises the following steps that a composite tower tube structure in an outer layer GFRP-steel tube-inner layer GFRP composite section form is adopted below the sea level and in a splash zone; mapping the coupling load time history to a parameterized finite element model of the composite tower tube structure; constructing a multi-objective optimization function by taking the minimization of the total manufacturing cost of the composite tower drum structure, the minimization of the total mass of the composite tower drum structure and the maximization of the total volume proportion of the GFRP material of the composite tower drum structure as objectives; and establishing a constraint evaluation system, carrying out iterative optimization on the multi-objective function by adopting a fast non-dominated sorting genetic algorithm with an elitist retention strategy, outputting a Pareto optimal solution set, and selecting a final implementation scheme. The problems that a traditional pure steel tower drum is large in corrosion loss and the design is difficult to balance multiple performance targets in the severe ocean environment can be solved.

The present application relates to the technical field of material performance testing, and discloses a material corrosion testing device and testing method for simulating ocean acidification environment, comprising: a closed simulation testing cabin, which is internally divided into a top-down salt mist simulation cabin, a wet heat simulation cabin and a high-pressure immersion simulation cabin by horizontally arranging openable and closable upper and lower insulation boards, and is provided with a cabin door with a sealing structure at the top; through the independent modular design of the salt mist simulation cabin, the wet heat simulation cabin and the high-pressure immersion simulation cabin, and the automatic switching function of the rotatable lifting sample holder, the present device realizes precise coupling and seamless switching of corrosion environments such as salt mist spraying, high temperature and high humidity, and deep sea high pressure, and the sample can complete the whole cycle corrosion behavior research of the marine atmospheric zone, the splash zone, the tidal zone and the full immersion zone on the same platform, and eliminates the interface effect caused by the traditional multiple equipment series connection testing.

A valve box applied to valve group protection in an ocean splash zone comprises a valve box body, a box cover, a transition plate and a seal of the transition plate which are matched with one another. A box cover inclined strut and a box cover buffering and sealing structure are arranged between the valve box body and the box cover. The transition plate is connected with the valve block and the valve box main body so as to reduce the specification of the valve box and adapt to different valve block specifications, and meanwhile, the rubber sheet is used for sealing; the inner wall of the valve box is provided with plates in the form of crossed holes so as to facilitate cable routing on the inner wall of the valve box; the cable penetrates through the wall to ensure waterproof sealing through an electrical wall-penetrating joint; the structure is reliable in sealing, convenient to operate and suitable for protection of different valve bank styles.

This invention relates to the field of stainless steel materials technology, specifically to a nickel-chromium-molybdenum-containing marine splash zone-resistant and corrosion-inhibiting stainless steel material and its preparation process. The chemical composition of the stainless steel material, by mass percentage, includes: carbon ≤0.04%, silicon 0.5%-0.8%, manganese ≤0.8%, phosphorus ≤0.02%, sulfur ≤0.0015%, chromium 22%, nickel 10%-11%, molybdenum 3.0%-3.5%, copper 1.2%-1.5%, titanium 0.2%-0.25%, niobium 0.1%-0.15%, with the remainder being iron. This invention's stainless steel material, through scientific chemical composition design, constructs a stable basic corrosion-resistant system. Simultaneously, the introduction of specific elements exerts a synergistic effect, effectively enhancing the stability and density of the passivation film on the material surface. This significantly improves the material's resistance to pitting corrosion in marine splash zones, reduces the risk of chloride ion damage to the passivation film, effectively inhibits intergranular corrosion, greatly improves the material's corrosion resistance stability, and extends its service life in harsh marine environments.

The present application relates to a kind of water-repellent breathable carbon mineralization protective coating and its preparation method and application, by mass parts, including the following components: γ-dicalcium silicate powder: 3~6 parts;Carbonization template: 0.3~0.9 parts;Crystal form regulator: 0.8~1.8 parts;Surface hydrophobic modifier: 0.01~0.1 parts;Water-retention and pore control agent: 2~5 parts.The present application water-repellent breathable carbon mineralization protective coating is based on the carbonization reaction of γ-dicalcium silicate, induces aragonite crystal form growth by crystal form regulator, gives coating surface hydrophobicity by surface hydrophobic modifier, improves pore and water retention by water-retention and pore control agent, can realize the function of water (liquid) blocking not gas (vapor) blocking, give consideration to water-repellent and breathability, effectively avoid the problem that coating is bubbled and falls off due to internal steam pressure is too large, especially suitable for coastal splash zone and tidal zone concrete protection.

345MPa grade building structure hot-rolled steel plate resistant to sea wave splash zone corrosion and its manufacturing method, the hot-rolled steel plate includes base layer, corrosion resistant layer and interface transition layer between base layer and corrosion resistant layer; base layer component mass percentage is: C 0.03~0.10%, Si 0.1~0.3%, Mn 1.00~1.50%, P 0.0005~0.003%, S 0.0005~0.01%, Cr 0.02~0.2%, Ni 0.01~0.1%, Cu 0.002~0.020%, Al 0.015~0.03%, Ti 0.008~0.018%, Nb 0.02~0.065%, N 0.0005~0.005%, the balance includes Fe and inevitable impurities; the corrosion resistant layer uses industrial pure titanium.The building structure hot-rolled steel plate of the application has yield strength ≥350MPa, tensile strength ≥490MPa, yield ratio is 0.71~0.80, impact energy at-40 DEG C is ≥190J, sea wave splash corrosion rate is ≤0.006mm / year, interface transition layer thickness is ≤10 μm, interface shear strength is ≥252MPa.

390MPa grade hot-rolled steel plate for building structure resisting sea-spray corrosion and its manufacturing method, the hot-rolled steel plate comprises a base layer, a corrosion-resistant layer and an interface transition layer between the base layer and the corrosion-resistant layer; the base layer has the following components by mass percentage: C 0.03-0.10%, Si 0.1-0.3%, Mn 1.00-1.50%, P 0.0005-0.003%, S 0.0005-0.01%, Cr 0.02-0.15%, Ni 0.01-0.1%, Cu 0.002-0.020%, Al 0.015-0.03%, Ti 0.008-0.012%, Nb 0.02-0.045%, N 0.0005-0.005%, and the balance contains Fe and inevitable impurities; the corrosion-resistant layer is made of industrial pure titanium.The yield strength of the hot-rolled steel plate for building structure is greater than or equal to 390MPa, the tensile strength is greater than or equal to 515MPa, the yield strength ratio is less than or equal to 0.75, the impact energy at-40℃ is greater than or equal to 190J, the sea-spray corrosion rate is less than or equal to 0.006mm / year, the interface transition layer thickness is less than or equal to 10μm, and the interface shear strength is greater than or equal to 270MPa.

The invention provides a compensation rope winding and unwinding method for a marine heavy-load folding-arm crane, which comprises the following steps of: deploying and recovering a load through an offshore crane, and connecting the load with a winch hook of the offshore crane when deploying the load; hoisting the load to the sea level by using a winch speed mode; when a sea level splash zone is reached, the winch speed mode is switched into a winch splash zone mode; the load continues to descend, and the winch splash zone mode is switched into a winch AHC mode; when the load is recovered, a winch AHC mode is used, and the lifting hook is connected with the load; the winch AHC mode is switched to the winch AT mode, and the load is hoisted away from the seabed; a winch AT mode is switched to a winch AHC mode, and the load is lifted to a sea level splash zone; the winch AHC mode is switched to the winch splash zone mode, and the load is hoisted away from the sea level splash zone; the winch splash zone mode is switched to the winch speed mode, the load is lifted to the needed height, and the lifting effect is good.

The application discloses a kind of corrosion-resistant offshore wind power FRP-steel composite tower drum structure multi-objective optimization design method, comprising the following steps: below sea level and splash zone are adopted with outer layer GFRP-steel pipe-inner layer GFRP composite cross-section form composite tower drum structure;Coupling load time history is mapped to the parameterized finite element model of composite tower drum structure;With the total manufacturing cost minimization of composite tower drum structure, the total mass minimization of composite tower drum structure, the total volume proportion maximization of GFRP material of composite tower drum structure is as target, and multi-objective optimization function is constructed;Establish constraint evaluation system, and the fast non-dominated sorting genetic algorithm with elite reservation strategy is used to iteratively optimize multi-objective function, and output pareto optimal solution set and select final implementation scheme.The application can solve the problem that traditional pure steel tower drum is greatly corroded and difficult to balance multiple performance targets in harsh marine environment.

The invention discloses a sacrificial anode device of a steel structure and a preparation method thereof, the sacrificial anode device comprises a fixing device, a plurality of sacrificial anodes and a filler, the fixing device is arranged on the outer side of the steel structure, the plurality of sacrificial anodes are arranged between the fixing device and the steel structure, and the filler is suitable for filling the peripheral sides of the plurality of sacrificial anodes. The sacrificial anodes are connected to the steel structure through wires, and the sacrificial anodes are formed by wrapping active metal in long-acting activation mortar. According to the method, the problem that traditional coating protection, underwater sacrificial anode protection and impressed current cathode protection cannot fully protect the steel structure in a tidal range zone and a splash zone can be effectively solved.

The present invention provides a hot-rolled strip steel for building structure, including a base layer, a corrosion-resistant layer, and an interfacial transition layer between the base layer and the corrosion-resistant layer. The hot-rolled strip steel for building structure of the present invention has a yield strength of ≥ 390 MPa, a tensile strength of ≥ 515 MPa, a yield-to-tensile ratio of ≤ 0.75, an impact energy at -40 °C of ≥ 190 J, a corrosion rate resistant to sea wave splash of ≤ 0.006 mm / year, an interfacial transition layer thickness of ≤ 8 µm, and an interfacial shear strength of ≥ 260 MPa, which exhibits an excellent overall performance. The present invention also provides a method for manufacturing the above hot-rolled strip steel.

This invention provides a nozzle arrangement method for secondary cooling of continuously cast billets, comprising: dividing the secondary cooling area of ​​the continuously cast billet into a spray zone for spraying and covering the billet body, an air-cooling zone to avoid spraying and cooling the corners of the billet, and a splashing zone located between the spray zone and the air-cooling zone; arranging nozzles at corresponding positions in the secondary cooling area according to the positions and areas of the spray zone, splashing zone, and air-cooling zone, so that the spray range of the nozzles covers the spray zone, and simultaneously forms the splashing zone and the air-cooling zone. This invention solves the problem in the prior art where adjusting the secondary cooling process alone cannot solve the problem of corner cracks under existing nozzle arrangements.

The utility model relates to a kind of offshore wind power suction pile foundation submarine cable protection pipe;Including suction pile body, suction pile connecting section, guide pipe support main leg, diagonal brace, transition section, main steel pipe, upper section submarine cable pipe, lower section submarine cable pipe, horn mouth, sealing plate, submarine cable pipe support, water filling hole, exhaust pipe, exhaust pipe support etc.。By setting upper and lower section submarine cable protection pipe in guide pipe support main leg inside, make full use of main leg internal space, avoid mutual conflict with additional current protection system and other accessory components;And upper section submarine cable protection pipe is set in main leg inside, can increase submarine cable pipe bending radius, be favorable to submarine cable threading.Carry out upper section submarine cable pipe to below splash zone and close upper guide pipe support main leg, effectively avoid the corrosion problem of splash zone main guide pipe inner wall.Simultaneously compared with full-length submarine cable pipe has the advantage of steel saving, project cost bottom.In addition, the upper horn mouth of lower section submarine cable pipe is extended to the form of guide pipe support main leg inside, which is convenient for cable traction rope threading.

The invention provides a construction method of an anti-corrosion coating of a foundation steel pile of an offshore wind power pile, which adopts a flexible composite sheet formed by an adhesive layer, a fiber reinforced layer and a fluorocarbon resin protective layer through a gradient hot-pressing composite process, and simplifies a plurality of traditional complex on-site coating processes into a standardized installation process. The construction efficiency and the quality controllability are remarkably improved, the offshore operation period is shortened, super-strong marine environment corrosion resistance, impact resistance and lasting bonding performance are achieved by means of the innovative composite structure of the coating material, and therefore the construction efficiency of the offshore wind power steel pile, especially a splash zone and a water change zone, is greatly improved, and the service life of the offshore wind power steel pile is prolonged. An efficient, reliable and ultra-long-life anti-corrosion protection solution is provided, the structural safety is effectively guaranteed, and the full-life-cycle maintenance cost is reduced.

The invention relates to a method, a device and equipment for measuring the stress corrosion acceleration multiple of a splashing area of an offshore wind power tower drum and a medium. The method comprises the following steps: determining offshore multi-source total stress borne by the splashing area of the offshore wind power tower drum; obtaining a yield strength value of a component material of a component corresponding to the offshore wind power tower drum, and respectively inputting the yield strength value of a preset percentage into a metal elastic deformation formula so as to determine each bending deflection value of the component material under different stress levels; all the bending deflection values are input into preset COMSOL Multiphysics software, so that average stress values corresponding to the different bending deflection values are obtained through analogue simulation; and if it is detected that the error between the average stress value and the theoretical maximum stress value of the component material is smaller than or equal to a preset threshold value, the specific value between the average stress value and the offshore multi-source total stress is calculated and determined so as to determine the stress corrosion acceleration multiple of the spatter area of the offshore wind power tower. Potential engineering accidents can be effectively prevented, and smooth project promotion is guaranteed.

The application provides a kind of offshore wind turbine tower corrosion monitoring and dynamic response fault early warning device, it is related to wind power generation operation and maintenance equipment technical field.The ultrasonic sensor device measures the thickness data information of wind turbine tower, the data acquisition card temporarily stores the thickness data, the multi-channel signal preprocessing module pre-processes the thickness data information, the data transmission unit transmits the thickness data information obtained by each ultrasonic sensor device to the corrosion monitoring server in the splash zone, the first atmospheric zone, the second atmospheric zone and the cabin, and the corrosion monitoring server processes the obtained thickness data information to monitor corrosion and dynamically respond to fault early warning in real time.During the process of real-time corrosion monitoring and dynamic response fault early warning, the disturbance measurement result caused by the change of the external environment of the wind turbine tower is avoided;The situation that the degree of rust layer surface peeling is taken as a random disturbance and cannot be accurately predicted is avoided, and the measurement result error is reduced.

The utility model relates to the technical field of wind power generation, in particular to a splash zone single pile anti-corrosion structure which comprises a single pile body, an anti-corrosion device is arranged on a splash zone of the single pile body, and the anti-corrosion device comprises an impressed current anti-corrosion device and a composite coating anti-corrosion device. The impressed current anti-corrosion device comprises a platform arranged on the upper portion of a single pile body, a constant potential rectifier placed on the platform, a current sensor and an auxiliary anode arranged on a splash zone, a reference electrode arranged at the bottom of the single pile body, and the constant potential rectifier, the current sensor and the auxiliary anode are connected in series through a cable. The composite coating anti-corrosion device comprises a composite anti-corrosion paste layer arranged outside the splash zone of the single pile body, an anti-corrosion buffer strip layer arranged outside the composite anti-corrosion paste layer, a waterproof ring layer arranged outside the anti-corrosion buffer strip layer, and a winding adhesive tape layer arranged outside the waterproof ring layer.

The present invention relates to a chloride ion corrosion test method coupled with wind load and seawater splash tide, comprising a test chamber, salt water, test components, and a wave-making assembly arranged in the test chamber; obtaining the daily average value of historical meteorological elements in the test area; the wave-making assembly comprises a fan and a second lifting assembly, the second lifting assembly driving the fan to maintain a constant height between the fan and the salt water level under normal conditions; the wind blown by the fan drives the salt water in the test chamber to fluctuate and simulate ocean waves, and the change of the water level is used to achieve the beating of the test components to form ocean wave impact areas, full immersion areas, and splash areas, etc., which can truly simulate actual working conditions; the salt water level in the test chamber can be controlled by a water pump, achieving dry-wet cycles for the test components, and achieving the purpose of accelerating the corrosion of the test components. At the same time, the simulated ocean waves blown by the wind will change along with the change of the water level, which can truly reflect the actual situation.

The invention relates to an anti-corrosion construction method for an offshore wind power foundation, belongs to the technical field of ocean engineering anti-corrosion, and solves the technical problem that the anti-corrosion service life of a foundation structure cannot meet the design requirement of a wind power plant due to the fact that a traditional single coating system is prone to early failure, pitting corrosion and stripping in a severe ocean environment, especially in a splash zone and a tidal range zone. The method comprises the following steps: carrying out sand blasting treatment on the outer surface of the steel structure until the cleanliness is Sa2.5 level and the roughness Ry is 60-100 microns; spraying a zinc-aluminum alloy bottom layer containing repairing microcapsules in the splash zone and the total immersion zone in an electric arc manner; coating an epoxy micaceous iron interlayer added with 0.5-1.5% of functionalized graphene oxide, wherein the thickness of the epoxy micaceous iron interlayer is 300-450 [mu] m; and finally, coating a fluorocarbon resin or polysiloxane surface layer, and scanning and curing by adopting intense pulsed light at the energy density of 5-15J / cm and the pulse width of 1-5ms. The method is mainly used for improving the long-term protection performance and prolonging the service life of the offshore wind power foundation structure in the corrosion environment.

The invention provides construction equipment for repairing damage of a coating of a steel pipe pile in a splash zone and a maintenance method of the construction equipment, the construction equipment comprises three cabins with fan-shaped arc empty shell structures, a track and a top cover, and the three cabins are respectively a water tank cabin, a comprehensive operation cabin and a water quality detection cabin. Water obtained after a to-be-repaired structure is cleaned can be taken out through the water tank cabin, the ion removal condition can be effectively represented through the water quality detection cabin, in addition, surface treatment-spraying-maintenance integrated work can be achieved through the comprehensive operation cabin, the overall working efficiency is improved, the service life of a repairing coating is prolonged, and the overall operation life of the structure is prolonged.

The invention discloses an environment simulation accelerated corrosion test method for a spray splash zone, which comprises the following steps: sorting material attributes, environmental factors and corrosion state data corresponding to a series, and respectively carrying out importance evaluation on the environmental factors influencing the corrosion rate and corrosion behavior of the splash zone; counting and analyzing an atmospheric environment value quantization interval and a change condition to form a splash zone atmospheric environment accumulation spectrogram; carrying out statistical analysis on a seawater environment value quantization interval and a change condition to form a splashing region seawater environment accumulation spectrogram; corresponding test environment parameter conditions and cycle combinations are determined through equivalent conversion in the effective corrosion action process of the atmosphere and seawater environment in the splash zone; carrying out a real sea splash zone coupon corrosion test; carrying out an indoor simulation accelerated corrosion test; and carrying out correlation analysis on the real sea test data and the indoor acceleration simulation test data of the splash zone. The acceleration multiplying power is determined through a real sea experiment result and an indoor simulation experiment result, and iterative optimization design is carried out on environment factor data.

A system for performing an operation on a partially submerged body (600) of a structure or vessel comprises: a primary vehicle (100) configured to traverse the body (600) above a splash zone, the primary vehicle (100) using magnetic or vacuum attachment (120a, 120b) to secure itself to the body; and a secondary vehicle (200) configured to move within or below the splash zone, the second vehicle (200) being tethered to the primary vehicle (100), and the secondary vehicle (200) comprising at least one tool (230) for performing the operation on the body (600).

This invention discloses a device and method for preventing freezing and corrosion of wharf pile foundations. It includes a berthing component for ship collision prevention installed on a pipe pile and a temperature-controlled module to prevent the pipe pile from freezing. The temperature-controlled module is installed in the splash zone and icing zone of the pipe pile, and the berthing component is installed at the edge of the wharf. The pipe pile also contains a power generation module and a battery to convert the kinetic energy of the berthing component under impact into electrical energy. The pipe pile also has a water spray module for removing contaminants from its outer wall. By setting up the berthing mechanism and power generation module, this invention converts the kinetic energy of the berthing mechanism under ship impact into electrical energy, which is stored in the battery and used by the temperature-controlled module. The temperature-controlled module can prevent the pipe pile from undergoing freeze-thaw cycles, improving the durability of the pipe pile. The water spray module sprays seawater from the piston cylinder during the conversion of kinetic energy into electrical energy, removing contaminants adhering to the outer wall of the pipe pile and preventing corrosion from contaminants.

A spray developing hood and spraying method for circulating and purifying a two-fluid process environment are disclosed. The hood includes a stacked top cover, a sealing gasket, and a top cover. The top cover consists of a conical guide hood and a truncated cylindrical confluence section, forming a liquid splash zone. A splash buffer zone is formed between the top cover and the conical hood to buffer and capture rising mist. The truncated cylindrical confluence section utilizes the potential energy difference generated by the continuous change in sidewall height to force the intercepted liquid to flow directionally towards the lowest sidewall section for discharge, and forms a transport avoidance port below the highest sidewall section. This application uses a double-layer spatial structure to stage and intercept high-kinetic-energy atomized fluid. Combined with the gravity guiding characteristics of the truncated section, it effectively prevents developer splashing and escaping from the outside and accumulating on the inner wall, eliminating the risk of droplets falling during film removal. This significantly improves process cleanliness and yield while reducing equipment height.

420MPa grade hot-rolled strip for building structure resisting splash zone corrosion of sea wave and its manufacturing method, the hot-rolled strip includes base layer, corrosion resistant layer and interface transition layer between base layer and corrosion resistant layer; the base layer component mass percentage is: C 0.03~0.15%, Si 0.15~0.35%, Mn 1.0~1.5%, P 0.0005~0.003%, S 0.0005~0.01%, Cr 0.08~0.45%, Ni 0.08~0.60%, Cu 0.05~0.2%, Al 0.02~0.05%, Ti 0.009~0.016%, Nb 0.03~0.06%, N 0.0005~0.005%, V 0.08~0.25%, the balance includes Fe and inevitable impurities; the corrosion resistant layer uses industrial pure titanium.The yield strength of the hot-rolled strip for building structure of the application is greater than or equal to 420MPa, the tensile strength is greater than or equal to 570MPa, the yield strength ratio is less than or equal to 0.79, the impact energy at-40 DEG C is greater than or equal to 190J, the corrosion rate of sea wave splash is less than or equal to 0.006mm / year, the interface transition layer thickness is less than or equal to 8 μm, and the interface shear strength is greater than or equal to 265MPa.

460MPa grade hot-rolled steel plate for building structure resisting splash zone corrosion and its manufacturing method, the hot-rolled steel plate includes base layer, corrosion resistant layer and interface transition layer between the base layer and the corrosion resistant layer; the base layer component mass percentage is: C 0.03~0.13%, Si 0.15~0.35%, Mn 1.0~1.5%, P 0.0005~0.003%, S 0.0005~0.01%, Cr 0.1~0.65%, Ni 0.30~1.2%, Cu 0.15~0.3%, Al 0.02~0.05%, Ti 0.009~0.016%, Nb 0.08~0.12%, N 0.0005~0.005%, B 0.0001~0.0003%, the balance contains Fe and inevitable impurities; the corrosion resistant layer uses industrial pure titanium.The yield strength of the hot-rolled steel plate for building structure is greater than or equal to 460MPa, the tensile strength is greater than or equal to 580MPa, the yield strength ratio is 0.73~0.81, the impact energy at-40 DEG C is greater than or equal to 190J, the corrosion rate of resisting splash zone is less than or equal to 0.006mm / year, the interface transition layer thickness is less than or equal to 10μm, and the interface shear strength is greater than or equal to 260MPa.

The invention relates to the technical field of berthing component construction, and discloses a splash zone berthing component dynamic self-adaptive mounting support system which comprises a longitudinal beam assembly, a foundation steel hoop assembly fixed to a high-pile wharf pile foundation, a fixing assembly mounted on a berthing component and a central control unit mounted on a wharf operation platform. According to the dynamic self-adaptive mounting bracket system for the ship berthing component in the splash zone and the construction method, the hydraulic buffer assembly, the angle sensor assembly and the central control unit are arranged, and wave impact energy is absorbed by utilizing the dynamic damping characteristic of the hydraulic buffer assembly; meanwhile, the central control unit adjusts the damping force in a closed loop mode according to real-time monitoring data of the sensor assembly, and the technical problem that due to the fact that a traditional rigid supporting system cannot adapt actively under wave disturbance, the precision of the installation position of a berthing component is low is solved; high-precision installation that the final installation deviation of the component is stably controlled at the millimeter level under the dynamic sea condition is achieved.

The application provides a bidirectional water-stopping hydraulic centralized control gate and a hydraulic control system, the gate comprising a gate plate, an eccentric flange, a hydraulic cylinder and a connecting piece; the gate plate is hingedly connected to the top of the eccentric flange in a rotatable manner through the connecting piece; the two ends of the hydraulic cylinder are connected to the gate plate and the inner side of the base through connecting pieces respectively; the gate plate is driven to move under the action of the hydraulic cylinder, thereby realizing the opening and closing of the gate; wherein the top of the eccentric flange is provided with a bidirectional sealing piece; the bidirectional water-stopping hydraulic centralized control gate and the hydraulic control system can adapt to harsh environments in splash zones, have the characteristics of high corrosion resistance, high bearing alternating impact resistance, zero leakage sealing, precise automatic control and long-term stable operation.

This application relates to the technical field of water conservancy and hydropower engineering, and in particular to a prefabricated splash zone protection sleeve and installation method for offshore wind power steel monopile foundations. This protective sleeve includes a prefabricated composite shell, a grouting layer, and fasteners. The prefabricated composite shell, which surrounds the outside of the steel monopile, is a segmented prefabricated component, with a UHPC outer layer and an ECC inner layer arranged radially from the outside to the inside. The grouting layer, formed by curing high-performance grout, has a continuous annular structure and fills the annular cavity between the ECC inner layer and the steel monopile. Fasteners are used to achieve a mechanical connection between the prefabricated composite shell and the steel monopile. The prefabricated composite shell has fastening holes, grouting holes, and venting holes. The segments of the shell are spliced ​​together by fasteners to form a closed protective sleeve. This protective sleeve can achieve a synergistic effect of outer layer impermeability, wear resistance, and impact resistance, and inner layer crack control and coordinated deformation, reducing the frequency of high-risk offshore maintenance.