250 results about "Marine terrace" patented technology

The invention provides a novel anti-skidding coating for a deck, which is composed of the following components in parts by weight: 30-45 parts of latex, 2-5 parts of film forming accessory ingredient, 15-25 parts of titanium pigment, 5-20 parts of filler, 0.2-1.0 part of wetting dispersant, 5-15 parts of anti-skidding agent, 0.1-0.5 part of de-foaming agent, 0.5-1.0 part of age inhibitor, 0.5-2.0 parts of thickening agent, 0.5-1.0 part of anti-mildew corrosion-protection agent, and 10-25 parts of water. The coating of the invention has very high wearing resistance and anti-skidding degree; the formed coat has good adhesive ability, wearing resistance, weather resistance, light-proof aging resistance, seawater resistance and salt mist resistance, wherein the artificial weathering aging test (ultraviolet UVB-313 resistance) is 4000 h, and the wearing resistance (1000g / 1000r) is not more than 30mg; the coating is applied to the corrosion prevention of the decks and the iron surfaces of the sea apparatus of boats and ocean platforms, wherein the decks and the iron surfaces require to have weather resistance, anti-skidding property, wearing resistance, and seawater corrosion resistance. The preparation method of the anti-skidding coating for the deck is simple in technology, low in cost and is performed without special apparatus.

An offshore well platform is towed in an upright condition to a well site by the use of a temporary flotation device. The flotation device mounts to a portion of the platform and is partially submerged, increasing the ability and buoyancy of the platform. At the site, the engagement of the flotation device shifts to a deploying position. In the deploying position, the ballast of the platform is increased to cause it to more deeply submerge. The flotation device remains at least partially surrounding the platform and floating while the platform moves downwardly relative to it. This provides lateral support if needed to prevent heeling while being submerged. The flotation device is disengageable from the platform when the platform is fully submerged.

An automatic control method for lifting an ocean platform is disclosed, and comprises the steps that an electronic level meter detects the inclined angle of the platform and inputting the inclined angle to a main controller; the main controller corrects the inclination data of the platform according to predetermined coefficients Kx and Ky; a linkage operating handle inputs the handle speed command Vo to the main controller and the main controller applies PID (Proportion Integration Differentiation) algorithm to acquire the leg running speed Vout and inputting the Vout to a speed control valve; the speed control valve controls a hydraulic motor to control the leg to run according to the speed command till the platform is lifted. The invention further discloses an automatic control device for lifting an ocean platform. The electric level meter is connected on the platform. The output end of the electric level meter is connected with the input end of the main controller and the output end of the main controller is connected with the speed control valve of each leg. The automatic control method and device for lifting an ocean platform control the leg to life synchronously and maintainthe platform by adopting closed-loop control of platform gesture, and are simple to operate and have high safety.

The invention discloses a step-flow deep sea vertical pipe array model vortex-induced vibration test device capable of considering top movement influences, belonging to the technical field of ocean engineering. The device comprise a plurality of deep sea vertical pipe modules, a top support module, a bottom support module, two vertical track modules, a horizontal track module, four fairing modules, a sleeve module, four motor modules and a measurement analysis control module. The test device disclosed by the invention can be provided with a large-size vertical pipe module, so as to avoid the size effect; by utilizing the test device disclosed by the invention, the vertical track modules and the horizontal module are fully used for simulating vortex-induced vibration of a large-size vertical model under the influence of an ocean platform; and the test device can be used for simulating different arrays formed by the deep sea vertical pipe modules according to the actual requirements. The sleeve is arranged outside the vertical pipe model, vertical pipes in the sleeve are not influenced by water flow during the test, and simulation of a step flow can be realized, thus the simulated external environment of the vertical pipe model is truer; and the modular design is adopted in the test device, thus the test device is convenient to mount and dismount.

The invention discloses a passive type deep sea heave compensation device for ocean platform drilling. A vertically arranged guide slot is formed in a drilling derrick (3); a vertically arranged spring (5) is fixedly arranged at the top of the guide slot; a pressing plate (6) located in the guide slot is fixedly arranged at the bottom of the spring (5); a floating overhead crane (7) is located under the pressing plate (6); and a center grooved wheel (8) provided with multiple wire ducts on the column surface is mounted in the floating overhead crane (7) in a rotatable manner. The heave compensation device disclosed by the invention further comprises a large hook (9), a water isolation pipe (10), a large hook lifting rope (11), a steel wire rope (12) and a displacement compensation mechanism I and a right displacement compensation mechanism II which are respectively arranged on the left and right sides of a stand (2). The displacement compensation mechanism I and the right displacementcompensation mechanism II are symmetrically disposed on the left and right. The passive type deep sea heave compensation device has the beneficial effects of simple structure, capability of verticallydropping down the water isolation pipe, high reliability, high compensation efficiency and high system response speed.

The invention provides a combined type ocean platform swinging reduction system, which comprises a platform, double-curved surface swinging reduction fins, a hydraulic device, a conveying pipeline anda control unit, wherein swinging reduction water cabins are respectively arranged at the left side and the right side in the platform; the double-curved surface swinging reduction fins are arranged at the two outer sides of the platform; the midpoint of the double-curved surface swinging reduction fins is connected with the outer wall of the platform through a rotating shaft; the hydraulic devicecomprises hydraulic cylinders which are arranged at two sides in the platform and are communicated with the swinging reduction water cabins in a watertight way; the hydraulic cylinders are divided into an upper hydraulic cylinder and a lower hydraulic cylinder which are vertically symmetrical by using a longitudinal center line as the boundary; the upper and lower hydraulic cylinders are respectively connected with two curved surface fins of the double-curved surface swinging reduction fins through push rods; the conveying pipeline is used for communicating with the swinging reduction water cabins arranged at the left and right side in the platform in a watertight way; a controller is used for performing data modification on inclination information collected by a position sensor accordingto the result measured by a water flowing pressure sensor, calculating the regulation water quantity according to the final platform inclination data, and controlling a water pump positioned in the conveying pipeline for regulation. The combined type ocean platform swinging reduction system has the advantages that the double-curved surface swinging reduction fins are combined with the hydraulic device for swinging reduction of a zero-navigational speed ocean platform; and the energy consumption is reduced.

The invention discloses a self-lifting type multifunctional ocean platform and a work method thereof and belongs to the technical field of marine transportation and ocean engineering technology. The multiple functions of the platform are combined to realize well drilling, well repairing, household self-holding and small-scale drilling. The self-lifting type multifunctional ocean platform mainly comprises a platform upper-layer deck, a machinery deck, cylindrical pile legs, a crane, pile shoes, a helicopter deck, a fore body lateral pushing part, a derrick, a tail thruster, pile shoe containing zones, a pile driver slideway, an LNG tank body, a pile driver, a main machine and the like. The self-lifting type multifunctional ocean platform meets the existing ocean engineering development requirement, achieves various operations such as ocean platform well drilling, well repairing, household self-holding and small-scale drilling, has the all-weather operation capability and long self-holding capability and adopts a cantilever drilling mode and advanced pile leg lifting equipment, drilling equipment and generating equipment. The self-lifting type multifunctional ocean platform is higher in integration capacity, has the well drilling, well repairing and small-scale drilling capacities, has a broad deck space, is provided with a natural gas collecting and compression treatment device and a corresponding power system, and is economical, efficient and high in engineering applicability.

The invention discloses a hybrid mooring system for ultra-deepwater floating structures and a mooring method in the field of marine engineering oil and gas development. The mooring method includes: recording a motion response value of an ocean platform in real time by a GPS (global position system), when the motion response value is lower than a preset reasonable response value, judging the current ocean condition to be the ordinary ocean condition, and otherwise the limit ocean condition; when in the limit ocean condition, straining a tension-type mooring line, and transmitting tension A on a catenary-type mooring line and tension B on the tension-type mooring line to a control module by a second tension sensor and a first tension sensor respectively; calculating a value C through a formula by the control module, if the value C is smaller than a preset reasonable difference, keeping the tension-type mooring line constant in length, otherwise comparing the tension A with the tension B, if A is smaller than B, loosening the tension-type mooring line in length, and if A is larger than B, shrinking the tension-type mooring line in length. By the mooring method, intelligent switching between a single set of catenary-type mooring line system and the hybrid mooring system can be automatically completed, and the mooring method is simple and convenient and rapid.

The present invention relates to the measuring method and device of sea wave load. The measurement includes the following steps: suspending one rigid cylinder around one marine platform casing; setting at least two dynamometric sensors between the rigid cylinder and the casing in proper axial positions; detecting the force of sea wave on the rigid cylinder with the dynamometric sensors and transmitting the measured data to available data processor for processing. The suspended sea wave load measuring device includes rigid cylinder, dynamometric sensors and connectors. The cylinder is connected to casing to fix the axial position via steel bar, steel wire or other flexible connectors without radial position constraint, so the present invention has simple structure. The present invention adopts marketable dynamometric sensors and thus has the advantages of high reliability, easy installation, etc.

The invention discloses a multifunctional pile leg applicable to an ocean platform. The multifunctional pile leg comprises a pile leg main body and a pile shoe. The pile shoe is a sealed hollow shell.The bottom of the pile leg main body is connected with the top of the pile shoe. The multifunctional pile leg further comprises a jetting mechanism and a seawater lifting device. The jetting mechanism comprises an upper jetting unit and a lower jetting unit which are mutually independent. A water conveying pipe is vertically arranged between an upper conveying pipe and a lower conveying pipe. Thewheel face of a guide pipe pulley abuts against the upper conveying pipe or the lower conveying pipe. A rope coiling device pulls the water conveying pipe to slide up and down along a gap between theupper conveying pipe and the lower conveying pipe through a guide pipe pulley mechanism. The seawater lifting device is arranged on a truss of the pile leg main body. The water conveying pipe is controlled to ascend and descend in the truss of the pile leg main body through the rope coiling device mounted on the ocean platform so that seawater can be extracted rapid; and the jetting mechanism isarranged for assisting in pulling out the pile shoe, and rapid pull-out of the pile shoe is achieved.

The invention discloses a special mounting and construction method for seabed fixation of an offshore platform in a soft soil layer sea area; and in a thick soft soil environment, a soft soil layer cannot be totally dug away. The method comprises the following steps: a large-diameter steel cylinder is beaten into the soft soil layer as a temporary or permanent support of a buoyancy cylinder; the buoyancy cylinder is accurately supported on the steel cylinder according to a preset plane and a vertical position; then, the piling is performed to produce a platform on piles; or the steel cylinder is used as a cofferdam, soft soil in the cylinder is replaced or modified to bear the load of the platform; the load is carried to a force holding layer at the seabed; and a straight cone at the bottom of the buoyancy cylinder and a concrete bed reverse cone prepared at the seabed are coupled to solve the position adjusting problem of the platform. The offshore platform and the mounting and construction method thereof can be applied to natural geological environments of all offshore areas; compared with the land reclamation, the method less destroys the environmental ecology; and compared with a steel floating platform, the offshore platform has more prominent economic benefit.

The invention relates to a deep sea self-contained type sensor based on multiple variables and an energy supply method thereof. The deep sea self-contained type sensor locally comprises a sensing unit, a data acquisition storage unit and a power supply module, wherein the sensing unit comprises an acceleration sensor, an inclined angle sensor and a temperature and humidity sensor; the data acquisition storage unit comprises an MCU (Micro Controller Unit), a storage, a clock circuit and a communication interface; the communication interface comprises a USB (Universal Serial Bus), a serial port and a wireless interface; and data is transferred to a computer through the communication interface, the change in acceleration of vibration and inclined angle of an ocean platform structure can be monitored and the change in temperature and humidity of marine environment can also be monitored. The deep sea self-contained type sensor based on multiple variables overcomes the defect of a traditional monitoring method for only monitoring a variable, can simultaneously monitor multiple variables and has the characteristics of high test precision, excellent stability, low power consumption, small size, and the like. Meanwhile, according to the provided energy supply method, the vibration energy of the ocean platform is converted into available electric energy so as to supply power to the disclosed sensor, so that energy is saved, environment is protected and working time of the sensor is effectively prolonged.

The invention provides a 47kg grade steel plate used on an ocean engineering platform and a production method thereof. According to the invention, low carbon content design is adopted, the alloying elements of Mn, Cr, Ni, Mo, V and Cu are added for micro alloy element intensification, the rolling technique of controlled rolling and controlled cooling is adopted, and finally a lath-shaped bainite and ferritic structure is obtained. Tests show that the steel plate provided by the invention has the yield strength of 480MPa, totally reaching the requirement of a 47kg grade, the tensile strength of the steel plate is 630MPa, and the elongation is 27.5%; the impacting energy of the steel plate is 284J under 40 DEG C below zero and is 290J under 60 DEG C below zero; and the low-temperature toughness of the steel plate is guaranteed. The 47kg grade steel plate can satisfy the requirement of operation of the ocean platform under low-temperature aquatic environment and thereby solves the problem of lower strength of steel used in ocean engineering.

The invention relates to the technical field of steel surface modification processing, in particular to a laser remelting method for a steel electric arc spraying aluminum coating layer used for an ocean platform, in order to solve the problem that the seawater corrosion resistant capacity of the coating layer is improved without increasing the thickness of the coating layer, and belongs to a material surface modification composite processing technology. By means of a electric arc spraying technology, a layer of the aluminum coating layer is prepared by using the surface of a steel base material on the ocean platform, then a laser remelting technology is used to iron melt the aluminum coating layer and the surface of a substrate, and after cooling is conducted, a Fe-Al alloy layer is formed; the surface of the coating layer is flat, the structure property can be improved, alloy combination is formed between the coating layer and the base material, a few amorphous state aluminum is generated in the coating layer, and the corrosion resistant performance of the coating layer can be improved.

The invention discloses an intertidal zone simple ocean platform and a construction method thereof. The intertidal zone simple ocean platform comprises a lower pile-barrel combination foundation and an upper platform block. The lower pile-barrel combination foundation comprises four barrel-shaped foundation bodies, the four barrel-shaped foundation bodies are opposite in pairs and distributed at intervals, every two of the four barrel-shaped foundation bodies are connected with each other to form a whole, the upper portion of the outer wall of each barrel-shaped foundation body is provided with a sleeve, and the top of each barrel-shaped foundation body is provided with a positioning pillar and a water feeding / discharging valve; the upper platform block is formed by welding four stand columns to an upper-end platform plate of the upper platform block, and the lower portions of the outer walls of the four stand columns are provided with sleeving pipes matched with the positioning pillars; and when the lower pile-barrel combination foundation and the upper platform block are assembled, the four sleeving pipes of the upper platform block sleeve and fix the four positioning pillars of the lower barrel-shaped foundation bodies. The intertidal zone simple ocean platform is large in foundation rigidity, the perpendicularity of the barrel-shaped foundation bodies automatically meet requirements, the weight of each independent component is small, construction is easy and convenient, the barrel-shaped foundation bodies penetrate into a seabed with the help of the seawater weight, and the intertidal zone simple ocean platform has economy and practicability.

The invention discloses a seawater corrosion resistant steel plate with high crack arrest and strain aging embrittlement resistance characteristics and a manufacturing method thereof. The seawater corrosion resistant steel plate is prepared from the compositions in percentage by weight: 0.040-0.070% of C, less than or equal to 0.15% of Si, 0.85-1.15% of Mn, less than or equal to 0.013% of P, lessthan or equal to 0.0030% of S, 0.90-1.20% of Cu, 0.60-1.00% of Ni, 0.05-0.30% of Mo, 0.010-0.030% of Nb, 0.008-0.014% of Ti, 0.040-0.070% of Al, less than or equal to 0.0050% of N, less than or equalto 0.0003% of B, 0.0010-0.0040% of Ca and the balance of Fe and inevitable impurities. The steel plate has high strength, excellent low-temperature toughness, the crack arresting characteristic and the strain aging embrittlement resistance characteristic, further has excellent seawater corrosion resistance, can withstand large heat input welding, is particularly suitable for icebreaker shells, offshore platforms, sea-crossing bridges, ocean wind tower structures, hydroelectric metal structures (pressure steel pipes, volutes, steel bifurcated pipes and hydraulic turbine metal components), pressure vessels and the like in ice sea areas, and can achieve stable mass industrial production.

The invention relates to a sea platform uplift reducer bearing clearance adjusting method and a special tool therefor. One of two bearings at both ends of a shaft of a reducer is a limit bearing A, the other one B is not a limit bearing; a compacting part of the adopted special tool extends into a bearing mounting hole; the compacting part is made to cling closely to an outer ring side face of the bearing B through manual rotation; axial clearance is eliminated by using a torque wrench to rotate the compacting part; a corresponding bearing cover of a reducer housing is made after calculation based on axial clearance values of various positions. The special tool comprises an axial clearance adjustment cover, wherein a connecting hole is arranged on the axial clearance adjustment cover; the compacting part is connected through an internal thread hole in the center of the axial clearance adjustment cover; and one end portion of the compacting part is arranged with a screw nut used for connecting with the torque wrench. According to the method provided by the invention, axial clearance of the reducer installed with the method has high precision; precision has good stability; service life of the reducer shaft components is prolonged; maintenance frequency is reduced; and use cost is reduced.

The invention discloses a universal offshore platform. The platform includes a truss body forming the support system of the platform. the truss body is a three-dimensional stable rigid support and comprises an underwater surface layer, a water surface layer and an overwater surface layer from bottom to top. It comprises a first floating body component, a second floating body component and several sporadic single floating bodies. The universal offshore platform of the present invention can be used independently, be used as a constitutional unit of a marine base and is less adversely affected by the wave motion. A buoyancy regulation method based on a universal offshore platform ensures stability of the platform and a power generation system based on the universal offshore platform takes full advantage of the energy of the waves to generate electricity.

The invention discloses a heat treatment process capable of improving NDT performance of steel for an F-grade ultrahigh-strength ocean platform. The heat treatment process comprises an online quenching step, a high-temperature subcritical quenching step and a tempering heat treatment step, wherein in the online quenching step, a temperature is Ac3+(50-100) DEG C, and uniform and fine lath martensite structures are obtained; Ac3 is a temperature for completely converting ferrites to austenites during hypoeutectoid steel heating; with regard to the lath martensite structures formed by the online quenching in the invention, a small amount of undissolved ferrites is left at austenite crystals during the high-temperature subcritical quenching, and due to the existence of the ferrites, the growth of the austenite crystal grains can be effectively inhibited and a role of refining the austenite crystal grains is played; after quenching, close lath martensites, a small amount of fine ferrite structures distributed along the crystal boundaries of the austenites, and trace amounts of austenite structures left among the lamella of the martensites are obtained; during tempering, the martensite laths are softened, supersaturated carbon atoms are separated out, and the ferrite matrixes are recovered and recrystallized; and the fine lath martensite structures can still ensure a high strength after the tempering.

The invention relates to a simulation test method for laying and installation of a submarine pipeline. A simulation test system consists of a motion bracket, a marine platform motion simulation system, a working ship model system, a pipeline model, a chart model, a control system, and a test data collection and analysis system. During the simulation testing process, on the basis of a pipeline laying plan of a target project, a pipeline on a marine platform model is laid; the pipeline is led out from the marine platform model by a guiding device from top to bottom until the lower end of the pipeline arrives at a predetermined connection position of the chart model; fixation with a preset position of the chart model is carried out; if no pipeline winding phenomenon occurs, pipeline laying iscarried out based on the original laying plan; and otherwise, recording is carried out and the original laying plan is modified.

The invention discloses a seawater lifting device arranged in a spud leg. The seawater lifting device comprises a seawater lifting pump and a water delivery pipe. The seawater lifting pump is installed at the bottom end of the water delivery pipe and communicates with the water delivery pipe, the water delivery pipe is perpendicularly installed in the spud leg of an ocean platform, two guiding pipes are close to the two sides of the water delivery pipe correspondingly and arranged in a truss of the spud leg, and the two ends of each guiding pipe are fixedly installed on the spud leg. A bulky lifting frame and a complex lifting driving mechanism are not needed, seawater extraction can further be achieved, the length of the water delivery pipe does not need to be larger than the height difference between the ocean platform and the sea level, the water delivery pipe is dropped into sea by adjusting the down-pass length of a tow rope, material consumption is reduced, and the production cost and the production difficulty are reduced; lifting can be controlled only through a rope collecting machine, operation is simple, energy consumption is low, and the using cost is reduced; and the seawater lifting device is arranged in the spud leg, a lifting channel does not need to be additionally arranged on the ocean platform, and less space is occupied.

The invention discloses a modular offshore floating type wind-solar hybrid power generation and storage platform which is characterized in that the platform comprises a full-floating type offshore floating type platform of a modular space truss structure, and the full-floating type offshore floating type platform comprises a deck platform, a plurality of stand columns and a buoyancy main body which are sequentially arranged in the vertical direction from top to bottom; the buoyancy of the buoyancy main body is realized by adjusting the buoyancy of at least part of buoyancy adjustable points inthe buoyancy main body; the wind-solar complementary assembly on the platform comprises a vertical-axis wind power generation device, a solar power generation device, an energy storage device and a seawater cooling device, and most of the components are arranged in a deck platform with a hollow conical interlayer. Modularized construction and expansion are adopted for the main body, the two prominent problems of stormy wave resistance and benefit generation in ocean platforms for deep sea cultivation and the like are solved, a comprehensive power generation system for solar power generation and vertical-axis wind power generation is constructed on the platform, and the problems of storage, heat dissipation, maintenance, guarantee and the like are solved; and a perfect power supply solution can be provided for other ocean platforms.

The invention provides a combined duck type wave power generation device and a power generation method. The combined duck type wave power generation device is provided with a hydraulic energy capturing system and a mechanical energy capturing system, wherein the hydraulic energy capturing system is installed on an ocean platform and is provided with a nodding duck floating body and a cantilever connecting mechanism connected with the nodding duck floating body; the mechanical energy capturing system is arranged in the nodding duck floating body and is provided with a differential integration mechanism and a reversing acceleration mechanism; the nodding duck floating body is provided with a front cabin and a rear cabin; the cantilever connecting mechanism is provided with a truss connectingunit and a hydraulic oil circuit unit; and the truss connecting unit is connected with the front cabin and the rear cabin so as to jointly form a parallelogram cubic structure displaced along with the displacement of the nodding duck floating body. According to the combined duck type wave power generation device and the power generation method provided by the invention, the hydraulic energy capturing system can convert wave energy into pressure energy of oil through an unstable structure of a parallelogram cantilever, and the mechanical energy capturing system can high-efficiently drive a gear to rotate so as to realize power generation by the power generation device, so that the combined duck type wave power generation device has the advantages of a mechanical transmission mechanism anda hydraulic transmission mechanism.

A stepped anti-subsidence leg of an ocean platform includes a leg, a ribbed plate, a stepped ring, transition sections and circular metal rings, the ribbed plate is welded between the leg and the stepped ring to remit stress concentration; the stepped ring is composed of a plurality of superposed steel tubes having different external diameters, a connection part between each two steel tube is provided with the transition section, and the transition section externally includes an inclined circular metal ring; pipe diameters of corresponding stepped sections are determined according to conditions of a surface foundation under a seabed soil level while mounting the leg, the stepped ring is hit to be sunken at 0.5-2.5m depth of the seabed soil level in a construction period of the leg in the seabed, so that an aim of anti-subsidence is implemented, simultaneously, depth of the leg sunken in the seabed also can be reduced about 1 / 3; fillers are placed at the connection part of the transition sections when it is necessary to hit the leg on the spot, and the fillers are externally covered with the inclined circular metal ring to bear loads.

The invention belongs to the technical field of ocean resource development and utilization, and relates to a wave power generation device, in particular to a wave power generation device capable of harvesting energy by utilizing a free pendulum. The wave power generation device is mounted on a moving or fixed ocean platform, and comprises the following three parts which are connected in sequence:a wave energy harvesting system, an energy transmission system and an energy output conversion system, wherein the wave energy harvesting system is used for harvesting wave energy and converting the harvested wave energy into mechanical energy; the energy transmission system is used for flexibly and unidirectionally transmitting reciprocating mechanical motion to the energy output conversion system; and the energy output conversion system is used for converting the transmitted mechanical energy into electric energy. The wave power generation device capable of harvesting energy by utilizing thefree pendulum has the beneficial effects that not only can wave energy of different wave directions be efficiently harvested, but also the constant value of wave energy can be converted into electricenergy output; the whole system is high in energy utilization ratio, easy to maintain, and steady in electric energy output; and the wave power generation device can be applied to various ocean platforms for power generation.

The present invention relates to the foil gage insulating method and device under deep sea condition. In the bottom edge of one thin metal hood comprising hood top and hood edge, one ring of brazingagent and soft brazing alloy in the same shape as that painted around the foil gage, and the hood has wire leading port in the top and bottom edge shape adaptive with the marine platform casing. after the thin metal hood covers onto the casing wall with adhered foil gage, the hood edge and the casing are brazed fast via heating. After the lead connected to the foil gage passes through the port,the port is sealed with high pressure sealing joint. Owing to the relatively low smelting point of the soft brazing alloy, the painting and brazing process has no influence on the mechanical performance of the casing wall and accurate measurement.

The invention discloses a steel plate for a thick-gauge high-toughness EH36-level ocean platform and a manufacturing method. The manufacturing method comprises the steps of heating of a plate blank, and rolling, cooling and heat treatment of the steel plate. A finished plate blank is composed of, by weight, 0.15%-0.18% of C, 0.30%-0.50% of Si, 1.4%-1.6% of Mn, 0-0.015% of P, 0-0.005% of S, greater than or equal to 0.020% of Alt, 0.030%-0.050% of Nb, 0.030%-0.050% of V, 0.008%-0.020% of Ti, 0.15%-0.30% of Ni, 0.0010%-0.0020% of La, and the balance Fe and impurities. The content of the Ni is low and the trace rare earth element La is added to serve as an alloying design for improving the strength and toughness of the steel plate; a normalizing heat treatment technique is adopted after controlled rolling and cooling, and accordingly the steel plate for the high-strength high-toughness thick-gauge ocean platform is obtained.

The ice force measuring device includes one cylinder with certain flexibility and one strain sensors. The cylinder is mounted onto the casing of marine platform, and can slide up and down along the casing without vertical constraint force. In the inside wall of the cylinder, there are the strain sensors adhered densely in the circumferential and longitudinal directions. Between the cylinder and the casing, soft silicone gel is filled. On two ends of the cylinder, some floating material is installed for the cylinder to float in marine. The cylinder structure can maintain the original geometrical shape of the casing at most and reduce the change caused by the change in geometrical shape of the ice load in the ice facing direction, so that the present invention has the advantages of direct measurement and indirect inversion.

The invention discloses a marine equipment underwater cleaning device which comprises a machine body, a mechanical arm, a cleaner, positioning clamping arms, electric crawler belts and cleaning discs.The mechanical arm is installed at the top of the machine body, the cleaner is installed at the tail end of the mechanical arm, and the two transverse opposite sides of the machine body are symmetrically provided with one set of the positioning clamping arms. Two electric crawler belts are sequentially arranged on each of two opposite transverse sides of the machine body at a distance, each set comprises two positioning clamping arms arranged at a distance, and the multiple cleaning discs are installed at the bottom of the machine body. The invention further discloses a cleaning control method of the device. The device meets the requirements of ship body surface cleaning and cleaning operation modes of ocean platform jackets, submarine pipelines and breeding nettings, and is high in universality, wide in application range and capable of saving cost; potential safety hazards brought to the device body due to uncontrollable underwater ocean current disturbance and other unpredictable potential risks are avoided, and the operation stability and the operation range are improved; and cleaning of all corners is guaranteed, the cleaning efficiency is high, and cleanliness is high.

The invention discloses marine climate resistant high-strength coating which comprises the following components of acrylic resin, polyether polyol, nano-silica, a hydrophilic acrylate dispersing agent, a polyether modified siloxane foam breaking agent, a composite mildewproof and bactericidal agent, a polyurethane thickening agent, a wetting agent, titanium dioxide, kaolinite, coarse whiting and deionized water. The coating has excellent adhesive force, wearing resistance, weather resistance, light aging resistance, sea water resistance and salt fog resistance, and can be used for corrosion protection of the surface of iron steel of decks, required to be weather-proof, anti-skid and wear-resistant, and seawater corrosion resistant, of ships, ocean platforms and the like and other marine facilities. According to the invention, a preparation method of the marine climate resistant high-strength coating is simple in technology, special equipment is not required, and the price is lower.