35results about How to "Small draft" patented technology

The present invention provides a large transport ship in which the shape of a ship bottom 1a from a bow 1h to a stem 1t, when viewed on a cross-section perpendicular to the longitudinal direction of the ship bottom 1a, is tapered towards the center CL of the ship bottom in the widthwise direction. Consequently, it is possible to resolve problems associated with changes in the draft corresponding to the state of the load, without using ballast water.

The invention discloses a planing boat with a catamaran three-channel hull. The planing boat is provided with a hull and a board at least. The bottom of the hull is provided with an A trunk bulkhead end surface, a B trunk bulkhead end surface, an A slideway, a B slideway, a C slideway, an A planing surface and a B planing surface; the B slideway is arranged along a central line and is a sector structure; the A planing surface and the B planing surface are arranged at two sides of the B slideway; the A slideway is arranged between the A planing surface and a right trunk bulkhead which is provided with the A trunk bulkhead end surface at the stern; and the C slideway is arranged between the B planing surface and a left trunk bulkhead which is provided with the B trunk bulkhead end surface atthe stern. The catamaran three-channel hull adopts oval channel section conformation to solve the concentrative stress problem of the hull effectively.simultaneously, on the basis of common channel planing boats, the invention adds two outer side channels at two sides of the stern and changes single channel type into three-channel type, thus greatly increasing the width of the stern, not only improving the effective use area of the board, but also enhancing the transversal stability of the planing boat and being capable of reducing the wave making of the boat.

The invention discloses a semi-submersible platform, which is mainly suitable for floating offshore oil and gas production platforms, drilling and workover platforms, or living support platforms that do not require high oil storage capacity. The base pontoon floating on the sea is vertically distributed with columns and deck boxes in sequence. The base pontoon, column and deck box are connected as a whole and form a through hole communicating with seawater in the vertical direction. Pool, the semi-submersible platform of the present invention adopts an integral structure, which effectively avoids the air gap problem existing in the conventional column-type semi-submersible platform, can reduce the height of the column, reduce the weight of the platform and the height of the center of gravity, and improve the stability of the semi-submersible platform. The cross-sectional area of ​​the column along the horizontal direction is smaller than the area of ​​any cross-section of the deck box along the horizontal direction. The deck box with the floating design increases the area of ​​the top of the deck box and changes the direction of wave climbing. The large-volume base pontoon further improves the semi-submersible platform. stability.

The invention aims to provide an assembled crane for a container vessel and an assembling manner of the assembled crane. Assembling tools and components are placed in a special container, and during operation, the assembling tools and components are mounted between the containers carried in an upper layer of the container vessel. The assembled crane comprises a channel beam structure, a crane top beam, a plurality of crane foundations, a plurality of crane supporting legs, a plurality of steel arm structures, a plurality of hoisting pulley blocks, a plurality of amplitude pulley blocks, a plurality of hoisting winches and a plurality of amplitude winches, wherein the channel beam is located on the container vessel; each of the crane foundations comprises a crane base and a corner fitting; a corner fitting hole is formed in the corresponding corner fitting; a clamping pin is arranged on the corresponding crane base; and under an operating state, the clamping pin on each of the crane base is inserted in the corresponding corner fitting hole to be fixedly connected. The assembled crane disclosed by the invention has the beneficial effects that assembling and urgent disassembling the containers can be quickly completed, the purposes of reducing and balancing the weight of the container vessel, reducing draught, righting the vessel and the like are achieved, and personal casualty and property losses caused when a large-scale container vessel and a super-large-scale container vessel suffer from accidents of running on rocks, cabin destroying, running aground and the like can be reduced to the maximum extent.

The invention provides a construction process for shipping large sinking pipes by a self-propelled semi-submerged ship for transporting the sinking pipes from a sinking pipe prefabrication factory to a foundation trench region for sinking pipe mounting construction. A mooring and outfitting region is arranged next to the foundation trench region, the semi-submerged ship loads the sinking pipes in a deep dock of the sinking pipe prefabrication factory and transports the same to the mooring and outfitting region, and after an outfitting step of the sinking pipes in the mooring and outfitting region is finished, the sinking pipes are transported to the foundation trench region in a floating manner through a sinking pipe mounting ship and a tug. According to the construction process for shipping large sinking pipes by the self-propelled semi-submerged ship provided by the invention, the floating transportation distance of the sinking pipe is greatly reduced, and the work efficiency of transporting the sinking pipe to 3-4 times; secondly, as draft of the semi-submerged ship which transports the sinking pipes is smaller compared with that of sinking pipe floating transportation in the prior art, the requirement on channel depth is greatly reduced. The channel needs not to be excavated, so that the time and economical costs are further saved; furthermore, the requirements on natural conditions such as a water wave flow by transporting the sinking pipes by the semi-submerged ship are relatively low, the limiting condition of transporting the sinking pipes is reduced, and the work efficiency of transporting the sinking pipes is further improved.