44 results about "Freeboard" patented technology

The invention discloses a method used for realizing the integral lifting of marine engineering modules in the marine engineering field. After the module is constructed integrally, the invention makes use of floating cranes, barges and special crane beams to realize the integral lifting of modules on water by regulating the sea gauge of a main hull. Compared with the similar technology, the invention has the following advantages that the preparation of special crane beams can reduce the length of lifting cables so as to enhance the effective lifting height of floating cranes; and the adopting of the floating crane to lift the modules to the barges can avoid the use of a plurality of fittings used for conveying so as to reduce the cost. Simultaneously, the deep water is adopted to moor the main ship so as to ballast the main hull and reduce the height of the freeboard and then the high lifting capability of the floating crane is enhanced and the shipbuilding cost is reduced finally.

A folding rigid boat for routine and emergency use by occupants as an auxiliary watercraft and including complementary rigid bow and rigid stern sections joined together along respective mating edges to form a hull, complementary rigid hinge elements cooperating together to form a centrally-disposed joint pivotally connecting the bow and stern sections along a port-to-starboard axis in vertically spaced-apart relation to the bottom of the hull for permitting the bow and stern sections to be folded onto themselves into a storage configuration and away from each other along the joint into an unfolded use configuration. Flexible topsides are secured to the hull along at least port and starboard sides of the hull for providing an upwardly-extending freeboard to the hull when the boat is in the unfolded use configuration. The topsides are unconnected to and independent of the rigid hinge elements. Waterproofing is carried by the bow and stern sections and is unconnected to and independent of the rigid hinge elements for preventing water leakage through centrally-disposed joint when in the boat is in the unfolded use configuration.

The invention relates to the technical field of immersed tube tunnel construction, in particular to a negative buoyancy immersed tube and a prefabricating method thereof. The immersed tube comprises abody, wherein the designed freeboard value of the body is smaller than 0. According to the negative buoyancy immersed tube, pipe joints do not need to be designed to be capable of self-floating in acorresponding water area, therefore, the section height of the immersed pipe does not need to be increased for guaranteeing the minimum freeboard value during floating transportation, the design contradiction between freeboard value consideration and anti-floating in the operation period in the design link is avoided, a dry dock does not need to be set for freeboard value detection, the method isparticularly suitable for engineering projects with limited fields, the design concept that a self-floating immersed tube must be adopted in the prior art is broken through, the structural height canbe reduced to the maximum extent, the engineering amount of a main body structure, foundation trench backfilling and the like is reduced, a freeboard adjusting layer does not need to be arranged, theprefabricating cost and the construction cost are effectively reduced, design difficulty and prefabricating difficulty are reduced, the cumbersome operation of adjusting the freeboard value in water in the floating transportation link is avoided, the transportation time can be shortened, and the method has important popularization significance and good application prospects.

It is an object of the present invention to provide a means of constructing an Autonomous fully-Submersible Offshore Marine Platform (ASOMP) of considerable warfighting or commercial capability which is mobile and can autonomously transport to a hazardous operating area in a low-observable reduced vulnerability manner, fully submerge to avoid the military or environmental threat hazard, hibernate until needed, perform fully submerged mobility and mission operations, surface and provide Barge and SWATH surface ship mobility and mission operations, resubmerge if the hazardous threat appears and relocate to a new operating area. Another object of the present invention is to provide a fully autonomous and submersible low-cost “lily-pad” that surfaces when called and provides a main deck platform at appropriate freeboard and seakeeping motions to function as a refueling landing zone and pier to extend the range of aircraft and marine vehicles operating in a high-threat environment.

The invention relates to the technical field of immersed tube tunnel construction, in particular to a design method of a negative buoyancy immersed tube. The method does not need to consider the design of a freeboard adjustment layer or consider the design contradiction between a freeboard value and floating resistance in an operation period, through the design thickness of ballast concrete determined by meeting the structural arrangement requirement, whether the preset first anti-floating coefficient is exceeded or not is inversely calculated, so that negative buoyancy larger than the corresponding preset requirement is obtained, then the design thickness of the first ballast concrete and the design thickness of the second ballast concrete are distributed according to the thickness calculated when the negative buoyancy is equal to the first anti-floating coefficient, it is effectively guaranteed that the immersed tube can meet the negative buoyancy requirement in the sinking and buttjoint stage specified by the existing specification, the negative buoyancy requirement after replacement of a ballast water tank is completed through butt joint specified by the existing specificationcan be met, meanwhile, the bearing capacity requirement of a transport ship is lowered, the lifting force needed in the immersed tube installation process can be reduced, the installation risk is reduced, and the transportation and installation cost is reduced.

The invention provides a lifeboat raft embarkation training collection station for a high freeboard ship. The collection station comprises a closed room which is disposed in a side cabin region of a side below a main deck of a ship body, and is located on a lifeboat collecting and descending route; a passing device which is used for entering the closed room from the deck; a watertight door which is used for closing an opening of the closed room on the ship body outer plate and is connected with a driving device; a boarding device which is used for boarding sailors to the lifeboat from the closed room or returning the sailors to the closed room from the lifeboat; a control device which is connected with the driving device and used for controlling the driving device to act so as to open and close the watertight door; a rope ladder fixing device which is used for fixing the embarkation rope ladder; a ventilation device which is used for ventilating the closed room; lighting equipment which is used for lighting the closed room; and communication equipment which is used for communicating the closed room with the outside. The collection station is advantaged in that the integrated station has double functions, safety of lifeboat raft training can be improved, and therefore the confidence of sailors for training is enhanced.

The invention relates to a deep sea culture ship. The deep sea culture ship is a wide and flat culture ship; a plurality of culture cabins are arranged in an inner cabin of the wide and flat culture ship; each culture cabin is of a regular hexagon structure enclosed by groove-shaped cabin walls; and the culture cabins are connected with one another and are arranged in a honeycomb shape. According to the structural design scheme of the deep sea culture ship, the deep sea culture ship is a wide and flat ship; the depth of the ship is small, the freeboard of the ship is small, and therefore, berthing and transferring of the ship are facilitated; in addition, the small depth is beneficial to the strength of groove-shaped bulkheads, meanwhile, the culture cabins define the regular hexagons through the groove-shaped bulkheads, and compared with existing quadrilateral culture cabins, the cabins can form fluid movement speeds in more directions during movement, fish growth is facilitated; no other cabins or cabin walls exist between the culture cabins, so that stress is greatly optimized, the weight is greatly reduced; and cabin arrangement is more compact, and the space utilization rate is high.

The invention relates to a sunken gas station of a dual-fuel container transport ship, and belongs to the technical field of ship design. The sunken gas station is arranged in the area, above a gas fuel cabin of the transport ship, below ship body main decks on the two sides, and the sunken gas station comprises a gas station door, a gas filling device in the gas station, a gas filling pipe, a gasfilling safety device and a gas station door operation system; the gas station is provided with the gas station door which is opened towards the outboard of the ship body; the gas station door operation system is arranged in the gas station on the inner side of the gas station door; the gas filling device in the gas station is arranged between the gas station door and the gas station door operation system; the gas filling safety device is arranged in the gas station; and the gas filling pipe connected with the gas fuel cabin is arranged in the gas station. The problem of the freeboard heightdifference between the dual-fuel container ship and the filling ship is solved, and the filling pipe of the filling ship can reach a gas station area more safely and efficiently; and more gas fuel canbe filled in a short time, so that the safety and the economy of the ship are improved.

The invention discloses a ship unloader transportation shipping technology, which comprises three stages, including loading, sea transportation and unshipping. The ship unloader transportation shipping technology has a special point that a way of combining a barge with a semi-submersible cargo ship is adopted to transport a ship unloader, i.e., the ship unloader is firstly rolled to the barge, themoulded depth of the barge and the freeboard of the semi-submersible cargo ship are added to achieve an elevation requirement of a user wharf, the problem that the ship unloader is difficult to realize roll unloading since the elevation of the user wharf is overlarge, and therefore, the successful transshipment of the ship unloader is guaranteed.

The invention discloses a ship navigation safety detection method based on image recognition. The method comprises the following steps: step 1, acquiring a navigation ship top view in real time; step2, judging the type of a navigation ship according to the ship top view, and setting a ship freeboard specified value according to a judgment result; step 3, acquiring a side view of the navigation ship in real time; step 4, calculating the actual value of the ship freeboard according to the obtained side view of the navigation ship; and step 5, judging whether the actual freeboard HG of the navigation ship meets a safe sailing requirement or not according to the ship type obtained in the step 2 and the ship freeboard specified value under the type. The freeboard height is monitored through animage recognition method, so that the ship navigation safety is ensured, whether the freeboard meets the design requirement or not during ship navigation can be calculated in real time, the safety state of the navigation ship is mastered in real time, and assistance is provided for safe navigation on water.

The invention provides an anti-pirate safety cabin ventilation system which is characterized by comprising an emergency air inlet and an emergency air outlet which are located below a freeboard deck, and each emergency air inlet is provided with a first watertight door, a second watertight door and a water inlet leakage detector with a light alarm. A conventional air inlet duct, an emergency air inlet duct, a conventional air outlet duct and an emergency air outlet duct are arranged in the anti-pirate safety cabin, switching between the conventional air inlet duct and the emergency air inlet duct and switching between the conventional air outlet duct and the emergency air outlet duct are achieved through position changes of the fireproof watertight inner door. And after boarding of the pirate, the conventional ventilation system is closed and the emergency ventilation system is opened by switching the second watertight door, so that hidden ventilation between the pirate-preventing safe closed cabin and the external atmosphere is carried out. The position of the emergency ventilation opening is hidden, ventilation power can be provided to guarantee fresh air oxygen supply after pirate boarding and power losing, and life safety of personnel in the anti-pirate safe closed cabin can be effectively guaranteed for a long time.

The invention provides a broadside planking piezoelectric power generation device utilizing ship rolling. The device comprises a fixed hinge support, an elastic material, a pressing plate, a cushion block, a piezoelectric material and a reset spring. According to the device, at the beginning of ship design, a piezoelectric material is embedded into a broadside outer plate of a freeboard part of a ship body, when rolling motion occurs in the ship navigation process, water pressure is used for extruding the piezoelectric material to generate power, generated electric energy is processed and then merged into a ship power grid to supply power to ship power equipment, and energy conservation and emission reduction of the ship are achieved. Besides, due to the fact that the length of the freeboard part above the waterline of the ship in the length direction of the ship is very long, a large number of the device can be arranged in a freeboard groove, when the ship performs rolling motion, the area of the freeboard part immersed in seawater is very large, and the pressure of the seawater on a board side outer plate of the freeboard part is very large. According to the invention, the recoverable energy is very huge, and the power generation effect is good.

The invention provides a north pole sea ice freeboard estimation method and system based on aviation laser altimetry data. The method comprises the steps of processing the aviation laser altimetry data, extracting parameters of laser foot points on a route, carrying out tide correction on the laser altimetry data, and calculating the residual elevation of the laser foot points. According to the surface reflectivity, identifying the inter-ice water channel, and extracting a laser foot point in the inter-ice water channel; calculating the local sea surface height, removing the laser foot points in the abnormal inter-ice water channel according to the large step length, extracting a plurality of points with the minimum residual elevation values of the laser foot points in the inter-ice water channel according to the small step length, and taking the average residual elevation value as the local sea surface height of the section; for the segment without the inter-ice water channel, the local sea surface height is obtained through local sea surface height interpolation of the adjacent segments; and calculating and outputting a sea ice freeboard prediction result by using the residual elevation and the local sea surface height. According to the method, Nile ice and gray ice are effectively removed by using the elevation value of the laser foot point, so that the reliability of a sea ice freeboard estimation result is improved.

The invention relates to the field of floating wharfs, and provides a wharf buoyancy tank leveling structure with balance weights and a wharf buoyancy tank. A through hole is formed in a buoyancy tankbody, a leveling device is arranged in the through hole, and comprises a cover plate, a pull rod, a flange plate and the balance weights, the pull rod is longitudinally inserted in the through hole,the top of the pull rod is detachably connected with the through hole through the cover plate, the flange plate is arranged on the bottom of the pull rod, and the balance weights are pressed above theflange plate. The wharf buoyancy tank leveling structure with the balance weights is used, the number of balance weights is increased and decreased or the balance weights of the different weights areallocated, the adjusting of the height of a freeboard on the local position of the wharf buoyancy tank can be achieved, when the position of the certain leveling device needs to be adjusted, the pullrod is pulled out, the number or the kind of the balance weights is adjusted on the flange plate, after adjusting, the pull rod is inserted into the through hole, the top face of the buoyancy tank achieves the horizontal state while the flowing stability of the buoyancy tank is ensured, and after leveling, the horizontal state of the wharf buoyancy tank can be kept for a long time.