19 results about "Double bottom" patented technology

The utility model discloses a multifunctional deck transport ship which comprises a main ship body and a dynamic positioning DP2 system, the main ship body is provided with a sinking mooring area, and the main ship body comprises a double-layer bottom deck, a middle deck, a main deck and a forecastle A deck. The dynamic positioning DP2 system comprises a bow thruster arranged on the bow portion of the ship and a pod thruster arranged on the stern portion of the ship. The multifunctional deck transport ship has the advantages of being high in maneuverability, high in maneuverability, longer in all-pass deck, wider in cargo transfer and loading and unloading operation range, higher in efficiency and high in safety.

The invention belongs to the technical field of ship body structures, and discloses a ship body double-layer bottom structure and an installation method thereof, in the installation process of the ship body double-layer bottom structure, when a worker assembles an inner bottom plate body, a ship outer plate, a solid rib plate and a rib, installation of a slow-installation cover plate can be delayed, and when the structure is assembled, installation of the slow-installation cover plate is facilitated. In addition, after installation of the inner bottom plate body, the ship outer plate, the solid rib plate and the ribs is completed, a worker can also firstly install other equipment in the bilge of the ship body, due to the fact that the slow installation cover plate is not installed yet, the large operation space is achieved at the moment, and after installation of the structure is completed, the worker can conveniently install the inner bottom plate body, the ship outer plate, the solid rib plate and the ribs. The buffer cover plate is installed in the containing groove and fixedly connected with the ship outer plate, the groove wall of the containing groove, the solid rib plate and the ribs at the same time, due to the fact that the surface of the buffer cover plate is flush with the surface of the inner bottom plate body, the space above the inner bottom plate cannot be occupied, and more installation space can be reserved for a liquid tank or cabin equipment.

The application discloses a marine bottom shielding structure combining a cabin bottom shielding structure and a stack bottom shielding structure, which comprises the cabin bottom shielding structure and the stack bottom shielding structure located on the lower plate of the double bottom of a ship body, and a stack cabin shielding structure and a primary shielding structure located on the upper plate of the double bottom of the ship body, wherein the primary shielding structure is wrapped outside a reactor pressure vessel, the stack cabin shielding structure is located outside the primary shielding structure, the cabin bottom shielding structure is located outside the stack bottom shielding structure, and the stack bottom shielding structure is located below the primary shielding structure. The marine bottom shielding structure combining the cabin bottom shielding structure and the stack bottom shielding structure has simple structure, can form a complete radiation shielding system together with the stack cabin shielding structure, the primary shielding structure and seawater below the ship body, and can weaken the radiation leakage of the stack cabin to the surrounding area to the maximum extent, so as to ensure the radiation safety of personnel and equipment in the surrounding area.

The utility model relates to a compact ship pipe tunnel vehicle arrangement structure in the technical field of ships, which comprises a track extending horizontally, a plurality of through holes penetrating through a pipe tunnel structure body and fixedly connected with the bottom edges of the through holes; the trolley body moves on the track and penetrates through the through hole, the trolley body comprises a frame and a plurality of rollers rotationally connected with the frame, the rollers are in rolling fit with the track, the whole frame is of a plate-shaped structure, the middle part of the frame is concave downwards, serves as a chassis part and is close to the upper surface of the track, and a chassis of the frame of the pipe tunnel trolley is lowered as much as possible; therefore, a large vertical space is obtained. The trolley can be arranged in a narrow double-layer bottom / pipe tunnel, and maintenance and transportation of piping system valves in the double-layer bottom / pipe tunnel are facilitated.

The present application relates to the technical field of shipbuilding, in particular to a double bottom cabin construction auxiliary device and a use method thereof, the double bottom cabin construction auxiliary device comprises a support frame and a manned platform, one end of the support frame is arranged in a first manhole of a first wall plate of a functional cabin and is detachably connected with the first wall plate, the other end of the support frame is arranged in a second manhole of a second wall plate of the functional cabin and is detachably connected with the second wall plate, the manned platform on the support frame is used for carrying a human body, and the manned platform can be moved from the first manhole to the second manhole in a manned state, since the first manhole and the second manhole are both located in the middle of the functional cabin, the inner bottom plate can be welded on the manned platform, the operator does not need to stand on a stool to work, and the operator does not need to get down from the stool and move the position of the stool many times, so that the construction efficiency is improved.

To provide a ship capable of reducing restriction of arrangement of a fuel tank and a pump and transferring methanol as fuel from the fuel tank by the pump while suppressing vaporization of the methanol.SOLUTION: A ship includes a hull having a pair of broadsides and a bottom, a lowermost deck provided in the hull and defining a double bottom space between the lowermost deck and the bottom, a tank at least partially provided in the double bottom space and capable of storing methanol as fuel, a pump provided outside the tank and below the lowermost deck in the hull and pumping the methanol in the tank, and a combustion device provided in the hull and to which the methanol pumped by the pump is supplied.SELECTED DRAWING: Figure 1

The present application belongs to the technical field of shipbuilding, and particularly relates to a ventilation method for a semi-submersible ship ballast tank. The ventilation method comprises the following steps: during the ship dock construction process, when the bottom ballast tank is shaped and a closed space is formed, air is sent into the space through a first ventilation hole on the outer bottom plate by using a air supply device, and air is extracted through a second ventilation hole of the double bottom plate by using an air extraction device, so that convection is formed. With the ship body shaping, air is continuously supplied through the first ventilation hole, and air extraction devices are arranged in each ballast tank, and regional air convection is realized through manholes. After the construction is completed, the relevant ventilation holes are closed, so that the ballast tanks form a closed state, and the smoke and harmful gases are effectively removed by accurately controlling the air supply and air extraction. The ventilation scheme of different construction stages is formulated, the ventilation flow direction is clear, the temporary work holes, the permanent manholes, the air supply device and the air extraction device are used, and the ballast tank is ventilated and exchanged, so that the construction environment is improved, and the construction operation efficiency is improved.

The invention relates to a ballast water tank arrangement strategy capable of improving ship sinking resistance, which is characterized in that a horizontal watertight partition plate is arranged in a gunwale tank of a double-bottom double-board ship, and the horizontal watertight partition plate is positioned at an outboard design waterline; the gunwale tank is divided into an upper void tank and a lower ballast water tank by the horizontal watertight partition plate, and the ballast water tank is filled with ballast water all the time. According to the double-bottom double-board ship side tank structure, under the condition that ballast tanks of a ship are filled with ballast water, when a single ballast tank and multiple ballast tanks are damaged or even all the ballast tanks are damaged, the floating state cannot be changed, and forward floating of the ship is guaranteed.

A ship body is provided with the double-layer bottom composed of an inner bottom plate and an outer bottom plate, inner bottom longitudinal ribs are arranged between the inner bottom plate and the outer bottom plate and on the inner bottom plate, outer bottom longitudinal ribs are arranged on the outer bottom plate, the pipe supporting tool is arranged between the inner bottom plate and the outer bottom plate, the pipe supporting tool is provided with a long-strip-shaped round pipe body, and the long-strip-shaped round pipe body is provided with a long-strip-shaped round pipe body. Square sealing plates are arranged at the two ends of the round pipe, and clamps are fixed outside the sealing plates. The clamp is vertically arranged between the inner bottom plate and the outer bottom plate, the inner bottom longitudinal bone and the outer bottom longitudinal bone are located at the two ends of the clamp respectively, inserted into a clamping groove formed by the two limiting plates and fixed through bolts in an abutting mode, and the multiple pipe supporting tools are arranged between the inner bottom plate and the outer bottom plate at equal intervals. The device is used for conducting temporary structural reinforcement on the area, where stress exceeds the standard, of the double-layer bottom structure in the ship launching process of slipway construction, the pressure bearing capacity of the double-layer bottom structure is enhanced, the bearing capacity of the ship bottom structure in the slipway area is effectively improved, and safe launching of the ship for slipway construction is achieved.

The invention relates to the technical field of ship construction, in particular to a ship double-layer bottom toggle plate design method which comprises the following steps: S1, determining the height h, the length a, the thickness t and the material yield stress ReH of a reinforcing toggle plate according to the relative deformation generated by a reinforcing frame and a transverse bulkhead and the height of a bottom rib plate; s2, an arc line is drawn on the side face of the reinforcing toggle plate, the arc line passes through the upper end point of the reinforcing toggle plate, the geometric center point of the side face and the lower end point of the reinforcing toggle plate, and an area defined by the arc line is cut and removed to form an arc-shaped face; s3, determining an inertia moment value of the reinforced toggle plate according to the height h, the thickness t and the material yield stress ReH of the reinforced toggle plate; and S4, reinforcing toggle plates are connected to the bottom rib plates in the outer bottom plate and the inner bottom plate, the upper ends of the reinforcing toggle plates are connected with the inner bottom longitudinal bones, and the lower ends of the reinforcing toggle plates are connected with the outer bottom longitudinal bones. The stress concentration can be reduced, so that the stability of the strong frame structure is improved.

The invention relates to the field of structure simplification with the same mechanical property, in particular to an equivalent simplification method and system for a double-layer bottom web beam section with the same mechanical property in a stranding scene. Based on a preset web beam structure unit, determining a single web beam unit at the bottom of the hull and the size thereof; non-distortion geometry and distortion needing to be designed in the target simplified flat plate structure system are determined; determining a single flat plate section geometric transformation criterion and a transformed geometry of the simplified flat plate structure system; preliminarily determining an obstacle input load of the flat plate structure system with determined geometry in a stranding scene; and in order to compensate errors caused by size rounding of the converted simplified flat plate structure system in actual engineering, collision mass compensation is provided for the flat plate structure system based on dimensional analysis, and an equivalent simplified flat plate structure system is obtained. According to the method, the problem of inconsistent mechanical properties of simplified double-layer bottom web beams is solved, and the efficiency of rapidly forecasting the strength of the hull double-layer bottom structure in the stranding scene can be remarkably improved.

The invention relates to the field of shipbuilding equipment.The anti-shearing structure of the container ship cabin comprises an outer plate, a double-layer bottom is arranged at the bottom end of the outer plate, a deck platform is horizontally arranged in the outer plate, an inner longitudinal wall is vertically arranged in the outer plate, the inner longitudinal wall is fixedly connected with the deck platform, and the inner longitudinal wall is fixedly connected with the deck platform. And the inner longitudinal wall is fixedly connected with the outer plate. The structure can be rapidly arranged, the cabin separation requirement of a cabin can be met, the effect of supporting a cabin deck can be achieved, the thickness of a hatch coaming is reduced, and the structure weight and the shipbuilding cost are reduced.

The application relates to the shipbuilding technical field, in particular to a double-bottom hold construction auxiliary device, which comprises a walking mechanism, the upper end of the walking mechanism is provided with a working platform for personnel to stand on, the lower end of the walking mechanism is provided with a plurality of roller assemblies, each roller assembly is arranged to roll on each first partition plate, the two ends of each roller assembly are connected with a baffle, each baffle is used for stopping each roller assembly from escaping from the two sides of the corresponding first partition plate, the outer circumferential side of each baffle is provided with a giving-way groove which is arranged in an axial direction and surrounds each roller assembly, each giving-way groove is used for giving way to each second partition plate, so that each roller assembly rolls from one side of each second partition plate to the other side of each second partition plate, the arrangement of the roller and the baffle enables the walking mechanism to stably move on the first partition plate, and the groove arranged on the baffle enables the walking mechanism to cross each second partition plate, so that the walking mechanism can move in the whole double-bottom hold.

The invention provides a ship double-layer bottom structure which is characterized in that a plurality of mounting parts are arranged in the width range of each container area, and on an inner bottom plate, the mounting parts corresponding to the two sides of the width of each container area are container corner mounting parts; the pipe tunnel longitudinal girder is arranged on the box corner mounting part close to the center line of the ship body; the distance between every two adjacent reinforcing longitudinal girders in the width direction of the ship body is 1-2 times of the width of the container area. And the longitudinal ribs corresponding to the box corner mounting parts are box corner reinforcing longitudinal ribs. According to the double-layer bottom structure of the ship, the installation positions and the arrangement modes of the trusses and the longitudinal bones are limited, on the premise that the structural strength is ensured, construction can be completed through a small number of structural parts, and therefore the construction efficiency is improved, and the construction cost is reduced.

The application provides a ship double-bottom structure, wherein a plurality of mounting portions are arranged in the width range of each container area, the mounting portions corresponding to the container area on both sides of the container area width on the inner bottom plate are box corner mounting portions; the pipe string longitudinal girder is arranged at the box corner mounting portion close to the ship centerline; the distance between two adjacent strengthening longitudinal girders in the ship width direction is 1-2 times the container area width; and the longitudinal bone corresponding to the box corner mounting portion is a box corner strengthening longitudinal bone. The ship double-bottom structure limits the mounting position and arrangement mode of the truss and the longitudinal bone, so that the same size ship can be built by using a smaller number of structural components under the premise of ensuring the structural strength, thereby improving the building efficiency and reducing the building cost.

The invention relates to a ship (1) with a hull (2) and a sailing device (3) comprising a telescopic mast (4) with a telescopic axis (t), and which can be integrated into a load-bearing system, a rescue system, and a propulsion system of the ship (1) with a level control (1') for the longitudinal, transverse, and vertical axes (x, y, z). The ship (1) has a buoyancy center (cb) and a center of gravity (cg), and is designed with an underwater hull (10) which connects a bow (14) to a stern (15) via a keel (12) and has a lowest bulkhead deck (q1) formed by a double bottom (11). The hull (2) has longitudinal and transverse bulkheads (b,b') which, together with a plurality of decks (p1-pn), enclose a plurality of vertically arranged air chambers (c1-cn) with a height (h) extending from a lower bulkhead deck (q1-qn) to a watertight main deck (13) along the longitudinal axis (x).The level control (1') of the longitudinal, transverse, and vertical axes (x,y,z) is achieved via extendable outboard wings (5,5') on the starboard and port sides, which together with a dynamically displaceable water ballast (6,6') of the underwater hull (10) are designed to align the telescopic axis (t) of the telescopic mast (4) installed in an air chamber (c1-cn) vertically when the ship (1) is sailing.

The invention relates to a multi-beam sounding method for an ultra-large trailing suction dredger, and the method comprises the following steps: S1, arranging a multi-beam sounding system: arranging three cabins at the position of a double-layer bottom, which is one third of the length of a bow, on the dredger, and respectively installing two sets of multi-beam depth sounder and a set of log; s2, preparation before operation: synchronously connecting a multi-beam sounding system with a GNSS, an IMU and a sound velocity profiler, and performing offset calibration and attitude calibration; s3, dredging operation: when the dredger starts dredging operation, the multi-wave velocity sounding system transmits current water depth data to an intelligent course operation system of the dredger, positioning data is provided by a GNSS, attitude data is provided by an IMU, and sound velocity data is provided by a sound velocity profiler; according to the multi-beam sounding method, efficient and continuous data acquisition and processing are realized on a working platform integrating vibration, noise and strenuous movement, and accurate data support is provided for dredging operation decision making of an ultra-large trailing suction dredger.

The present invention relates to a pipeless cargo hold suitable for bulk carriers, and belongs to the field of ship design and manufacturing technology. A left empty tank and a right empty tank are respectively provided in the left ballast tank and the right ballast tank on both sides of the double bottom of the bulk carrier, as well as in the left pier ballast tank and the right pier ballast tank in the pier area; pipelines are provided in the left empty tank and the right empty tank; and maintenance passages leading to the left empty tank and the right empty tank are respectively provided along the left and right corrugated bulkheads. The present invention can meet the requirements of ballast water volume, bending moment shear force, etc. in the design of bulk carriers, and can also meet the maintenance requirements of the shipowner for valve accessories under full load. The pipe volume eliminated by the present invention can be used as the ballast tank volume, so that the forepeak tank can be used as an empty tank, reducing the bending moment shear force of the ship design, effectively reducing the structural design weight, and reducing the shipyard construction cost.

The present invention discloses a modeling method, system, device, medium and program product for local plate frames of ships. The modeling method comprises: determining a target modeling area in a Smart3D three-dimensional modeling environment; inputting multiple rib positions of the local plate frames to be constructed and modeling parameters corresponding to each rib position in the target modeling area according to the ship design drawings to construct a plurality of local plate models; setting a plurality of target openings in each local plate model based on the opening information to generate a plate frame opening model; generating a local reinforcement model based on the opening information and reinforcement information; and obtaining a local plate frame model of the ship based on the local reinforcement model and the plate frame opening model. The present invention performs plate modeling and reinforcement modeling on the side, double bottom and pipe room by simultaneously inputting multiple rib positions and modeling parameters corresponding to each rib position, thereby generating a plate frame opening model and a local reinforcement model, thereby avoiding a large amount of manual repetitive work and improving the efficiency of ship production design.