217results about "Hull shells" patented technology

Apparatus for providing an enclosure, for example as a housing or to provide buoyancy, at underwater locations is disclosed comprising an inner shell and an outer shell, with a structural filler disposed between the two. The shells are prepared from fibre-reinforced plastic, with the fibres being oriented to provide resistance to both longitudinal and radial stresses induced in the apparatus by the hydrostatic pressure. The filler may be a structural filler comprising structural members extending between the inner and outer shells and occupying less than 60% of the volume of the cavity between the two shells. Alternatively, the filler may be a substantially void-free structural filler, such as a polyester resin. Methods of fabricating the apparatus are disclosed. In addition, a method of deballasting a buoyancy module is disclosed, in which the ballast, for example water, is withdrawn from the module by means of reduced pressure. Apparatus for deballasting is also disclosed.

A cryogenic fluid offloading system, having a tanker vessel (2) moored in line with an offshore mooring construction (4, 8) and connected to a processing unit, such as regasification plant (13). The degasification plant (13) has no large storage facilities, the tanker (2) being unloaded in dependence on onshore demand for gas.

A pontoon with an improved running surface and methods for construction the same are provided. The pontoon comprises an interior concave main running surface formed along the longitudinal centerline of the pontoon which is bounded by two sponsons, which in turn are bounded by two distal concave surfaces, or integrated lifting strakes. The associated methods provide a process for retrofitting prior art pontoons or constructing the pontoon to avoid the need for welds below the waterline of the pontoon. The pontoon provides improved pontoon boat performance by maximizing lift and minimizing leakage. The pontoon also reduces construction costs by lowering the number of welds required to form a pontoon with lifting strakes.

The invention provides a hull construction of a oil tank for transporting oil and fresh water by using all ballast tanks formed in a double hull space as fresh water tanks 4a-4e and 5a-5e, and two combining tanks 11, 12 are provided at a central portion of a hull for combining a sea water ballast tank and a fresh water cargo tank. In this manner, non-wasteful sailing of an oil tanker can be realized by utilizing the tanker for transporting oil cargoes on a forward route and fresh water on a backward route.

The invention belongs to the field of vibration control, in particular relating to a buffer device which prevents a boat body from generating vibration caused by water jet impact; wherein, an elastic part and a baffle are arranged on at least part of the contact surface between the boat body and the water; the elastic part is positioned between the baffle and the corresponding boat body, and the baffle is connected with the boat body through the elastic part. A buffering vibration-reducing device of the invention can isolate the impact outside the boat body from the boat body and has good effect of vibration reduction and can also prolong the service life of the boat body through most of the inertia balance of the baffle and the buffering of the elastic part. The invention can be widely applied in the vibration control over impact of buffering water on the boat bodies of various boats and is not only suitable for the situations which bear the periodic excitation force such as blade water but also the situations of random impact or other sudden impacts produced by buffering wind waves, etc.

Provided is a method of forming a thru-hole through a composite structure having a plurality of internal compartments. An insert ring is connected to the composite structure to create a protective layer around the periphery of a penetration formed within the composite structure. An adhesive is disposed between the composite structure and the insert ring to create a fluid-tight seal between the insert ring and the internal compartments. In this regard, the fluid-tight seal mitigates fluid flow between the internal compartments.

A method and arrangement for reducing the weight and optimizing the longitudinal strength of a water-craft (1), which is especially suitable for transportation of liquefied natural gas (LNG) or other corresponding mediums and comprises a hull (2), which has a deck (3) extending over at least the main part of the water-craft (1) and a number of substantially spherical cargo tanks (4) arranged successively in the longitudinal direction (A) of the water-craft (1) and a deckhouse (5), which extend substantially above the said deck (3). The hull (2) of the water-craft (1) is provided with a continuous protective casing structure (6) known as such and which is arranged on top of the cargo tanks (4). The said deck (3) of the water-craft is arranged on the hull (2) so that the proportion of its height measured from the bottom of the water-craft to the height of the uppermost continuous portion of the protective casing structure (6) on top of the cargo tanks (4) is at most 0.55, preferably at most 0.5. In addition said protective casing structure (6) is fixed to said deck (3) and / or other structures (7) supported to the hull (2) and is dimensioned together with the other parts of the hull (2) so that together they constitute an essential part of the overall strength of the water-craft.

The invention is an improved aluminum water craft using a plurality of aluminum pontoons to stabilize the craft. The hull of the craft has a truncated “U” shape with a first horizontal section and a second raised bow section. The hull is made from a single piece of construction material and includes a plurality of equally spaced apart concave-shaped reinforcing ribs pressed into the top surface of the construction sheets prior to forming the hull. The ribs provide additional rigidity and strength to the hull. The plurality of pontoons join to form a segmented, un-pressurized, water-tight, air filled floatation collar around the hull of the water craft. The pontoon segments are separated by bulkhead plates. The pontoons are inclined from the horizontal to promote smooth travel over turbulent water. The pontoons are constructed from single sheets of construction material. A plurality equally spaced and parallel reinforcing ribs pressed into the rectangular sheets. The sheets are then rolled into the cylindrical shaped pontoons and welded.

A floating latticework is suitable for a latticework, a truss-frame structure and a net-shell structure over water. The floating latticework is the combination of a latticework (1) and a floating structure (2), or members of the latticework (1) in themselves are able to float. The floating structure (2) makes the latticework (1) floated over water, the surface of upper chords of which is in form of a platy structure or covered and fixed with a platy structure, as a plane used for loading. There is an advantage that the space-structure floating body is less influenced by wind and wave, which go through its space. A ship structure and a cofferdam structure are parallel solutions with the above solution. Their skeletons are net-shell structure, wherein they are provided with high structural strength.

The invention relates to a dragon boat with frusta support type suspension base plates arranged in a boat body with integrated inner layer and outer layer, which is characterized in that the boat body comprises an integral liner, an integral outer shell and a boat board beam, the front end of the liner is provided with a boat head hanging groove, a boat channel card, caulking grooves of chairs and a drum position, the rear end of the liner is sequentially provided with a rudder position and a boat tail hanging groove, the inner walls of the both inner sides of the liner under a water line of the dragon boat are provided with base plate edges, the integral liner is arranged in the integral outer shell, the boat board beam is connected with the top parts of the integral outer shell and the integral liner to form the double-layer wall boat body with a head floating bin and a tail floating bin, the boat head hanging groove and the boat tail hanging groove are respectively articulated with a boat head and a boat tail, the frusta support type suspension base plates are distributed on the base plate edges of the liner, and both sides of the bottom center of each frusta support type suspension base plate are provided with double pedals. The dragon boat not only has reasonable design, compact structure and improved strength and rigidity, is not easy to deform, but is easy to manufacture and assemble and increases production efficiency, and the boat head and the boat tail are not easy to damage, are convenient to carry and have attractive appearance.

The invention relates to a mooring system with a first vessel for containing hydrocarbons having at its bow and / or stern a transverse arm and a fluid transfer mechanism of a duct connected to a tank on the first vessel and a coupling end for connecting to a second vessel. The second vessel is moored alongside the first vessel and is attached via at least one cable, extending from its bow in the length direction of the vessel, to a mooring end of the arm. The mooring end of the arm is situated at or near a longitudinal centerline of the second vessel. The arm, during use, is in a fixed position and a pulling force element is attached to the cable for applying a pulling force on the cable upon relative movement of the second vessel with respect to the arm. The force element allows a predetermined maximum displacement of the second vessel.

The invention relates to a double-wall dragon boat and its facture. It is characterized in that connect a double-wall boat body between the dragon head and the tail, the double-wall has the external layer of the outside shell made of the compound material, the inner side of the outside shell above the floating line is adhered the inner layer of the wood board and forms the upper part of the boat, the outside shell below the floating line connects the inner layer of the inside shell forms the lower part of the boat, the two sides of the shell top set the longitudinal dragon bone, and the top side face opposite the side bone is distributed with the bearing bridge equipment composed of the bearing board, the bridge, the support base and the bolts, the boat bottom below the bearing board has two kicks, the body has front and back floating cabs. The invention has tight structure, proper design and strong rigidity.

The present invention relates to a ballast-free ship. By adjusting the amount of air supplied from compressed-air supply piping (20), a seawater level in an air cushion chamber (15) is adjusted. Accordingly, even in a case of the ballast-free ship, there is secured a function to adjust a hull equivalent to an adjusting function of a ship having ballast tanks. One end of the compressed-air supply piping (20) is opened to the air cushion chamber (15) divided by horizontal and vertical partition plates (14, 13). Below the horizontal partition plate (14), a current plate (18) is disposed with a space through which seawater passes. In an air chamber (4) arranged on an inner side of a side wall (2), one end of an ventilation pipe (17) is opened at a position with a height identical to an upper surface of the current plate (18). The other end of the ventilation pipe (17) is opened to a seawater lever outside the side wall (2).

The invention relates to a concentric double-ball lifeboat which comprises an outer ball and an inner ball. The inner ball is arranged in the outer ball, the outer ball and the inner ball are concentric, power devices are arranged on the outer ball, a sandwich layer space is arranged between the outer ball and the inner ball, the inner ball comprises a shell and a cavity, and the cavity of the inner ball is arranged in the shell and is communicated with spaces outside the concentric double-ball lifeboat via an access passage in the sandwich layer space. The concentric double-ball lifeboat has the advantages that escape persons can be positioned in the cavity of the inner ball of the concentric double-ball lifeboat, external disturbance can be prevented from being transmitted into the inner ball via the outer ball when the concentric double-ball lifeboat shakes in intense wind and wave environments, and accordingly the concentric double-ball lifeboat is excellent in inherent wind and wave resistance; the concentric double-ball lifeboat can be in a water surface working mode and a submergence working mode; the concentric double-ball lifeboat in the submergence working mode can effective adapt to surviving in offshore fire and explosion scenes as compared with existing totally enclosed type lifeboats, can effectively avoid high-temperature and harmful gas during sea surface oil gas fire and can assist the escape persons to escape from the fire scenes from the optimal directions when the submergence depths of the concentric double-ball lifeboat exceeds the draft of the concentric double-ball lifeboat.

The invention relates to an underwater noiseless, drag-reducing and antifouling bionic housing, and belongs to the technical field of the ship building and ocean engineering. Parallel or radial U-shaped channels are distributed on the outer surface of a hard housing substrate. The U-shaped channels are formed by multiple strips of minitype ridge-shaped structures on the outer surface of the substrate. The outer surface of the substrate in each channel is provided with spherical-crown-shaped grooves distributed in the regular dot matrix. The underwater noiseless, drag-reducing and antifouling bionic housing is capable of, through the channel and groove design on the surface of the substrate, enabling the wave to be hindered in the transmission process of the housing, realizing the effective control of the vibration transmission, reducing the radiated sound, affecting the generation of the resistance through the effective control of the contact of the surface and the fluid, achieving the goal of the energy conservation and drag reduction, and improving the antifouling ability of the housing surface as the underwater creatures are easily fallen off because of the unstable attachment.

The invention provides a double-hull bottom double-hull ship, which comprises a double-layer hull bottom and a double-layer hull, wherein a foaming layer is arranged in a gap of the double-layer hull bottom or double-layer hull. Preferably, the double-layer hull bottom and the double-layer hull are made of a plastic material and are integrally molded. According to the double-hull bottom double-hull ship, a rotational molding mode is adopted, the integral molding of the double-hull bottom double-hull ship can be ensured, and the molding is uniform, so that a ship hull can keep balance; and the gap can be formed in the double-layer hull by rotational molding, and can be filled with a foam material. The double-hull bottom double-hull ship has the advantages that the foam layer is arranged in the double-layer hull bottom or double-layer hull, so the safety of the ship hull can be increased; when the double-hull bottom double-hull ship encounters an external force, the foam layer can form buffering, so the safety of the ship hull can be ensured, even if water enters a cabin, the whole ship hull can float on a water surface by virtue of the buoyancy of the foam layer, and life and property security can be ensured; in addition, the double-hull bottom double-hull ship is subjected to rotational molding by adopting plastic, so that the manufacturing cost is relatively low.

A pontoon with an improved running surface and methods for construction the same are provided. The pontoon comprises an interior concave main running surface formed along the longitudinal centerline of the pontoon which is bounded by two sponsons, which in turn are bounded by two distal concave surfaces, or integrated lifting strakes. The associated methods provide a process for retrofitting prior art pontoons or constructing the pontoon to avoid the need for welds below the waterline of the pontoon. The pontoon provides improved pontoon boat performance by maximizing lift and minimizing leakage. The pontoon also reduces construction costs by lowering the number of welds required to form a pontoon with lifting strakes.

The invention discloses a shock-resistant protective structure for a ship. The shock-resistant protective structure comprises an inner sandwich plate and an outer sandwich plate, wherein a sandwiched truss is arranged between the inner sandwich plate and the outer sandwich plate; the sandwiched truss consists of a plurality of longitudinal truss units; each longitudinal truss unit comprises truss plates which are arranged to form an angle with each other; the plurality of longitudinal truss units are uniformly distributed between the inner sandwich plate and the outer sandwich plate. Compared with the prior art, the shock-resistant protective structure for the ship has the advantages as follows: under the condition that the structural weights are the same, the size of a structural component is reduced, the shock resistance is greatly improved, and the problem that the structural shock resistance is improved by increasing the structural size and the number of structures is solved; under the condition that the same shock-resistant effect is achieved, reduction of the structural weight can be achieved, and the economic value is increased; quick assembly can be achieved through prefabrication, simplification of a construction process is achieved, and in the latter ship repair, quick repair can also be achieved by a module replacing method.

A butt joint octagonal frustum type floating production storage and offloading (FPSO) system, wherein a floating body is provided with an upper structural body in an octagonal frustum shape and a lower structural body in a regular octagonal frustum shape; in a combined state, a smaller bottom surface of the upper structural body is fixedly connected with a smaller bottom surface of the lower structural body, to form a junction surface; the axis of the upper structural body and the axis of the lower structural body are positioned on the same straight line; the larger bottom of the upper structural body acts as an upper deck of the floating structure and the larger bottom of the lower structural body acts as a lower plate underwater of the floating structure; the junction surface is a full-load waterplane of the floating structure.

A generally rectangular metallic extrusion (20) for boat hull (21) construction, the extrusion (20) supporting a bottom sheet member (26). The extrusion (20) comprises a number of longitudinal ribs (30) installed upwardly from the bottom sheet, a first longitudinal rib (23) having a generally rounded protruding male joint (22), and a last longitudinal rib (28) having a generally concave female joint (24) mounted to surround the male joint (22) of an adjoinning extrusion (20). The male joint (22) has a recessed neck (39), of the same thickness as the bottom sheet (26), and receives a base (35) of the female joint (24) to form a welding nest. A mounting form is first set and the extrusions laid according to a desired shape. The rotation and adjustment of the protruding male joint (22) in the adjoining concave female joint (24) permits the positioning and meshing of two extrusions (20) at a selected deflection angle, before welding.

Provided is a LNG storage tank of a membrane type mounted on a LNG-FPSO or a LNG carrier, wherein volumetric efficiency is high and sloshing does not easily occur at the time of heavy weather. In order to solve this problem, a membrane-type tank is composed of a main tank under a deck and a box-shaped head tank on the deck. These main and head tanks communicate with each other via a hole opened in the deck to form one tank. The main tank is formed by forming a heat insulation layer on inner sides of a double bottom and left and right longitudinal bulkheads and further by liquid-tightly covering the top by a membrane of Invar or the like. Similarly, the head tank also has a heat insulation layer and a membrane provided on its inner surface.

The invention provides an environment-friendly and energy-saving boat only powered by a water pumping system. The body of the energy-saving boat consists of two piece bodies, the engine room of each piece body is internally provided with at more than one centrifugal pumps, the front side wall and the back side wall of each engine room are provided with a plurality of water inlet holes and water outlet holes, the number of the water inlet holes and the number of the water outlet holes are the same as that of the centrifugal pumps, the water inlet ends of the centrifugal pumps are connected with the water inlet holes by a plurality of water inlet pipes, the water outlet ends of the centrifugal pumps are connected with the water outlet holes by a plurality of water outlet pipes, the water inlet pipes and the water outlet pipes are provided with a plurality of electromagnetic valves, the water inlet pipes between the water inlet ends of the centrifugal pumps and the electromagnetic valvesof the water inlet pipes and the water outlet pipes between the electromagnetic valves of the water outlet pipes and the water outlet holes are connected with a plurality of U-shaped water inlet auxiliary pipes, the water inlet pipes between the electromagnetic valves of the water inlet pipes and the water inlet holes and the water outlet pipes between the water outlet ends of the centrifugal pumps and the electromagnetic valves of the water outlet pipes are connected with a plurality of U-shaped water outlet auxiliary pipes, both the water inlet auxiliary pipes and the water outlet auxiliarypipes are provided with the electromagnetic valves, and each engine room is further provided with a power supply which provides power for the centrifugal pumps. The environment-friendly and energy-saving boat is easy to realize the advancing.

The present invention relates to a rebuilt double hull tanker and a method of rebuilding an existing single hull tanker into a rebuilt double hull tanker. The rebuilt double hull tanker includes an internally rebuilt double bottom hull comprising the existing outer bottom hull and a new inner bottom hull that is disposed internal and spaced apart from the existing outer bottom hull and externally rebuilt double side hulls (e.g., port and starboard) comprising the existing inner side hulls and new outer side hulls disposed external and spaced apart from the existing inner side hull. The method includes forming the new double hull, including a new double bottom hull and new double side hulls, over at least the cargo carrying portion of the tanker by installing at least a portion of the new inner bottom hull internally over the existing outer bottom hull through cut-outs in the topside decking. The method also includes the use of model basin testing and computational fluid dynamics to assist in the hull design in the area of the transition regions between the new outer side hull and the existing side hull.

A sandglass type ocean engineering floating structure is provided with an upper structural body shaped as a circular truncated cone or frustum and a lower structural body shaped as a regular circular truncated cone or regular frustum; under a combined state, the smaller bottom surface of the upper structural body is fixedly connected with the smaller bottom surface of the lower structural body to form a junction surface; the axis of the upper structural body and the axis of the lower structural body are positioned on the same straight line; the larger bottom of the upper structural body acts as an upper deck of the floating structure and the larger bottom of the lower structural body acts as a lower plate underwater of the floating structure; the junction surface is a full-load waterplane of the floating structure.

Provided is a method of forming a thru-hole through a composite structure having a plurality of internal compartments. An insert ring is connected to the composite structure to create a protective layer around the periphery of a penetration formed within the composite structure. An adhesive is disposed between the composite structure and the insert ring to create a fluid-tight seal between the insert ring and the internal compartments. In this regard, the fluid-tight seal mitigates fluid flow between the internal compartments.

A design and construction method reduces the amount of structural material (e.g., steel) required when applying the corrosion allowance to the design of floating offshore structures. The (hull) structural elements involved are typically flat or curved panels where at least one side is wet, e.g.; inside a ballast tank or exposed to seawater. The method minimizes the area to which the largest corrosion allowance is applied. One principle of this method is to have a maximum of one wet side for each hull watertight plating element. The stiffening of this hull structural element is applied to the dry side, i.e., the side that requires the lesser amount of corrosion allowance. Practice of the method typically results in a hull design wherein ballast tanks do not share a common structural element with either another ballast tank or the hull external shell.

An inflatable hull including at least one air casing that has two walls placed one over the other. The walls each include a fabric sheet, are connected therebetween by a plurality of connecting wires distributed over the entire surface of the sheets while forming a structure suitable for being inflated to a pressure capable of rigidifying the structure, and are capable of ensuring the buoyancy of the hull separately from any reported buoyancy element. The casing has a first transversely cross-sectional curvature and a second longitudinally cross-sectional curvature that is present over at least the front portion of the casing. One of the walls corresponds to the inside of the curvature, and the other of the walls corresponds to the outside of the curvature. The casing has at least one clip set up such as to form a stem.

A double hull marine vessel is provided which includes a syntactic foam-macrosphere composition between the inner and outer hulls which dissipates force applied to an outer hull.