50results about How to "Reduce shipbuilding costs" patented technology

The invention provides a containment system for type B independent liquid cargo tank. The liquid cargo tank comprises a top surface, a bottom surface and a side wall, wherein the top surface, the bottom surface and the side wall are formed by welding a plurality of outer plates; the containment system comprises leakage slots and liquid collecting wells; the leakage slots respectively cover all the weld seams among the outer plates on the top surface and the side wall; the liquid leaking from the weld seams can flow down along the leakage slots to an inner bottom plate of a hull; one or more liquid collecting wells are respectively arranged at both ends of the inner bottom plate in the length direction of the hull; insulating layers are laid on the top surface, the bottom surface and the side wall; the containment system also comprises a baffle plate; the baffle plate is arranged around the liquid cargo tank; and the upper end of the baffle plate is connected with the wall plate of the hull, and the lower end of the baffle plate is connected with the inner bottom plate. According to the containment system disclosed by the invention, the cost is reduced in the aspect of materials by reasonable design of the containment system, and the containment system can guarantee the safety of the hull structure in the case of liquid cargo leakage in the liquid cargo tank.

The invention relates to a hidden anchor recess. Sides of a first elbow plate and a second elbow plate are symmetrically welded at the two sides of an anchor recess side plate. Bottom plates of the first elbow plate and the second elbow plate are welded to an outer plate respectively. One side of a third elbow plate is welded to an anchor recess top plate and the other side of the third elbow plate is welded to the inner side of an anchor chain tube. The first side of a fourth elbow plate is welded to the outer side of the anchor chain tube, the second side of the fourth elbow plate is welded to the anchor recess top plate and the third side of the fourth elbow plate is welded to the outer plate. One side of a fifth elbow plate is welded to an anchor recess bottom plate and the other side of the fifth elbow plate is welded to the outer plate. In an inner field stage, all parts of the hidden anchor recess and the five elbow plates are welded and assembled and the hidden anchor recess is welded to the outer plate at one time in a slipway stage. According to the hidden anchor recess, a plurality of elbow plates are added on the outer side of the anchor recess and the included angles between the anchor recess and other devices are fixed, the sizes of parts are determined at one time and precision of manufacturing the parts is improved. Work of the anchor recess is completed in the inner field in advance instead of being performed in the slipway. Work loads and the waste and return amount of the slipway are reduced, the period of shipbuilding is shortened and shipbuilding cost is reduced.

The invention relates to a technology for reducing allowance cutting during ship building. In the technology, a hull is firstly divided into a plurality of general sections for building; and the general sections are gathered up. The invention is characterized in that in the step of lofting and baiting of parts, section allowance, slipway allowance, compensation dosage and material cutting are additionally and respectively placed once on a deck, a strake, a longitudinal bone, a rib, an enforced bone, a wall plate and other structures of each typical node according to section splicing or section butt joint and other different forms; in the step of the whole building of the general sections, when the joint of one of two general sections is provided with a transversal bulkhead, the two general sections adopt a splicing form, and the general section without the transversal bulkhead is inserted with the general section with the transversal bulkhead for carrying out sintered ceramsite liner welding; and when the joint of the two general sections are not provided with the transversal bulkhead, the two general sections adopt a sintered ceramsite liner welding butt joint form. The invention can determine the size of parts once, and improve the precision of parts manufacturing, thereby avoiding on-site secondary cutting quantity, and providing guarantee for general section construction; and the procedures are shifted forward, thus reducing slipway working capacity and waste backflow volume, shortening building ship period and reducing building ship cost.

The invention relates to a multifunctional installation and investigation vessel, which comprises a vessel body and is characterized in that an A-type lifting frame, an oceanographic engineering crane and a derrick are sequentially arranged in the X direction on a main deck of the vessel body; a crane winch is arranged below the main deck, and a steel wire rope passes through the main deck; the crane and the crane winch are respectively arranged in positions on two sides of the vessel body; multiple empty tanks are arranged between the inner bottom and the outer bottom of the vessel body and in positions on two sides of the vessel body, and multiple lower water ballast tanks are arranged on the inner sides of the two sides of the vessel body; opposite tanks on the two sides of the vessel body are communicated via communication passages; an energy converter tank is also arranged at the bottom of the vessel body. When the tanks are damaged, water can enter the empty tanks uniformly, so that the stability is improved; when water in the empty tanks on one side of the vessel body is excessive, water can flow from one side to the other side of the vessel body via the communication passages, so that the transverse inclination after damage of the vessel can be reduced and the damaged stability is improved.

The invention discloses a precision control method for a container ship binding system without a real ship box test. According to the method, after precision control production of hatch covers, a hatch coamings and lashing bridges according to the design drawing, the theoretical distance between box feet in the hatch covers and the lashing hole plates in the corresponding lashing bridges is compared with the measuring distance, actual allowance values of the lashing pieces in the real ship are obtained through calculation, and the actual allowance values of the lashing pieces are controlled tobe always larger than the allowable minimum allowance values, so that positions of all the lashing hole plates on the ship meet the requirements, the interference among the adjacent lashing pieces isavoided, and then the real ship lashing test can be effectively avoided, the shipbuilding cost can be reduced, and the shipbuilding period can be shortened.

The invention discloses a seawater pipeline filter, consisting two filters (1) and two three-way valves (2) which are connected into a whole by flanges, wherein the two filters (1) are communicated with two valves of the two three-way valves (2); third valves of the two three-way valves (2) are respectively an inlet (6) and an outlet (7); the three-way valves (2) are also provided with spanners (3); and the spanners (3) are provided with valves in the three-way valves (2), and the valves are used for opening and closing the two valves of the three-way valves (2). The invention provides a seawater pipeline filter applicable to complex water areas and can clean obstructions under the condition that the water flow in the seawater pipeline is not cut off.

The invention discloses an idler wheel switch blade chain pulling device. A first bracket and a second bracket of the idler wheel switch blade chain pulling device are located on the vertical plane of the axial lead of an idler wheel, the upper end of the lateral side of a third bracket is located below a left lining, the upper end of the lateral side of a fourth bracket is located below a right lining, the lateral side of the first bracket and the lateral side of the third bracket are respectively connected with a left side plate of a body in a welded mode, and the lateral side of the second bracket and the lateral side of the fourth bracket are connected with a right side plate of the body in a welded mode. Parts of the idler wheel switch blade chain pulling device are assembled in place in an internal field according to designed sizes, the four brackets are welded on the body of the idler wheel switch blade chain pulling device, and one-step installation can be achieved when the idler wheel switch blade chain pulling device is installed on a slipway. According to the idler wheel switch blade chain pulling device, the four brackets are additionally installed, the dip angle alpha between the idler wheel switch blade chain pulling device and a deck is directly determined, the sizes of the parts of the idler wheel switch blade chain pulling device are directly determined at one time in the internal field, the manufacturing accuracy of the parts is improved, and the ship building cost is reduced.

The invention relates to a dual-body water conservancy power generation ship. Damming power generation is characterized in that the unit installed capacity is determined by the water flow fall. The dam-free water conservancy power generation ship is characterized in that the unit (ship) installed capacity is determined by traction positioning energy of a traction device. According to the dual-body water conservancy power generation ship, a large traction hanging pile (sunken anchor) and a shore hanging pile (shore anchor) are built at the river bottom to be combined with the power generation ship to form three-dimensional triangular traction positioning, and water flow attacks a unit paddle wheel to convert water flow power into mechanical energy for work doing power generation. In order to improve the installed capacity and effectively reduce dual-anchor loads, dual-anchor-chain hanging points are selectively arranged at the portions of dual-hull-bottom keels to form appropriate angles, so that water flow attacking is converted into upper floating force to reduce resistance. In order to keep the balance of the dual-body ship, the installing space is increased, and the ship building cost is reduced; the flat-bottom dual-body ship is selected. A control system is formed by three anchors and ship-load power so as to keep the transverse level and the longitudinal level of the dual-body ship, and the best water flow is selected through transverse movement positioning. The unit is suitable for working doing power generation in any water flow state through wheel propeller lifting operation.

The invention relates to a method of installing a heating coil used for a liquid cargo tank of a chemical cargo ship. The liquid cargo tank is divided first, corresponding heating coil unit modules ofeach liquid cargo tank unit are prepared separately and then are hoisted and installed according to an installation progress to achieve one cabin and one module in each liquid cargo tank. Heating coil pipe docking work of an original slipway is completed in advance on a platform, the mode that hoisting is conducted once in each cabin is achieved, the labor intensity is reduced, the working environment of construction personnel is improved, the working efficiency is improved, the slipway cycle is greatly shortened, and the construction cost of the chemical cargo ship is reduced.

The invention relates to a method for pressing circular tubes by an oil press in the shipbuilding process, which comprises that: 1, an upper die and a lower die are designed, the upper end face of the upper die is provided with arc grooves corresponding to the diameter of a circular tube to be pressed, the upper die is fixed with a pressure head of the oil press, and the lower die is locked on a press platform of the oil press by a limit block; and 2, press lines of which the interval is 50mm are marked along the length direction of a plate, the plate which is prepared and marked with the press lines on the lower die is flatly placed, the pressure head of the oil press drives the upper die to run downwards and act on the press lines, the action is repeated to press the positions of various press lines, the plate is gradually pressed into a semi-finished product circular tube of which the middle is reserved with a gap of 20mm, the gap of 20mm of the semi-finished product circular tube is sealed, and fixed by welding, and the semi-finished product circular tube is welded and corrected to finally form the circular tube. The method only needs one oil press, and is matched with special dies to process the circular tubes, and not only reduces the dependency on a special tube-rolling machine, but also can improve the wall thickness of rolled tubes, reduce the requirements on equipment configuration of shipyards and shorten the shipbuilding period.

The invention discloses a pipe check platform instrument, characterized by comprising a fixed mounting platform and a plurality of measurement mechanisms. The fixed mounting platform comprises a horizontal reference plate with an X graduation line and a Y graduation line, and a vertical reference plate perpendicular to the horizontal reference plate; the vertical plate is provided with connection apertures used for fixing installation flanges of a detected pipe. Each measurement mechanism comprises a scale column, and a base capable of being fixed to the horizontal reference plate; the base is provided with a panel; the scale column is provided with an infrared ray projector capable of sliding up and down along the scale column; the lower end of the scale column is fixedly provided with a rotary angle disc; the rotary angle disc is in connection with the panel, and can rotate relative to the panel.

The invention discloses a focusable LED (light emitting diode) water surface fishing lamp and a fishing ship with the focusable LED water surface fishing lamp. The focusable LED water surface fishing lamp comprises at least two fishing lamps, wherein each of the two fishing lamps comprises a plurality of LED assemblies, each of the LED assemblies comprises an LED light source, a reflective cup, a lens and a focusing device, each LED light source is arranged on a PCB (printed circuit board), each reflective cup is arranged at the reflecting surface of the corresponding LED source, each lens is arranged at the opening surface of the corresponding reflective cup, and each focusing device is arranged on the corresponding lens. Compared with the prior art, the focusable LED water surface fishing lamp and the fishing ship have the advantages that the energy loss is reduced, the shipbuilding cost is reduced, and the emission of greenhouse gases is reduced; by adjusting the focus, the irradiation distance of each lamp can be changed; the intensity of light rays which vertically irradiate to sky and ground is decreased, the utilization rate of the light rays is improved, and the energy loss is further reduced.

The invention discloses a mounting base of a ship gyrocompass system azimuth repeater compass. The mounting base comprises a first steel plate, a steel pipe is welded to the middle of the first steelplate, three second steel plates are arranged at the top of the first steel plate, and the bottoms of the multiple second steel plates are fixed to the top of the first steel plate. Flat iron is mounted in the middle of the side face of one side of the steel pipe, a third steel plate is arranged above the flat iron, and the third steel plate is fixed to the side face of one side, close to the flatiron, of the steel pipe. Each of the outer surface and the inner surface of the steel pipe is plated with a layer of zinc, the first steel plate, the second steel plates and the third steel plate alladopt 6 mm steel plates, and the steel pipe adopts a seamless steel pipe with the inner diameter being 3 inches. The mounting base is easy to operate, can be easily manufactured by a ship factory, isconvenient to mount, and saves the ship manufacturing cost.

The invention discloses a hull construction new process, a new structure and application thereof. The hull construction process at least comprises one of the following processes: a, assembling shell plates of a ship on an inflation tire to accomplish the shell construction of the ship, wherein the operation is not accomplished on the traditional keel system and a rib frame; b, constructing the whole shell on the entire deck of the ship, wherein the initially constructed hull is a floater with the deck at the lower side and the hull bottom at the upper side; and then filling water in partial cabin of the floater until the average volume weight of the whole floater is lightly less than the volume weight of the water and a top-heavy state is formed; entirely overturning in the water so that the deck is at the upper side and the hull bottom is at the lower side; c, enabling the entire deck of the ship to be the floater, and anchoring on a calm water surface, and accomplishing the construction procedure of the hull on the floater; d, avoiding the use of the entire heavy component on the whole hull, wherein the construction of the shell adopts the process of hoisting shell plates at multipoint by using the unmanned aerial vehicle to assemble, thereby reaching aims of improving the efficiency and shortening the days for construction.

The invention discloses a duplex fuel oil filter which consists of a change-over valve core (3), a left cavity and a right cavity, wherein an operating handle (12) is arranged on the top of the change-over valve core (3); a filter body (1) and a filter cartridge (2) are arranged in each cavity; each filter cartridge (2) is sleeved with the corresponding filter body (1); a gland (6) is arranged at the upper end of each filter body (1); a pressing crossbar (8) is arranged on each gland (6); a compressed spring (4) is arranged in each filter body (1); the top end of each compressed spring (4) is fixed with the corresponding gland (6); each filter cartridge (2) is pressed on the corresponding filter body (1) through the bottom of the corresponding compressed spring. According to the duplex fuel oil filter provided by the invention, when one group of filters cannot work due to blockage, the other group of filters can be switched to work, so that the machine is not influenced by blockage of the filters, and the filters can be cleaned or replaced under the non-stop condition.

The invention discloses a leveling method for generating wave shapes on a ship T-slipway panel and a segmented free edge. The leveling method is based on a following device, and the device comprises two C-shaped portal main plates arranged in parallel, a cross beam, positioning screws and a jack; one end of each portal main plate is provided with a main plate inserting groove, and the other end of each portal main plate is provided with a cross beam hole; the two ends of the cross beam are arranged in the cross beam holes; and the positioning screw is in threaded connection with the portal main plates. The leveling method comprises the following steps that 1, the two portal main plates are inserted into the two sides of the position, needing to be leveled, of a product from the main plate inserting grooves, and the distance between the two portal main plates is determined according to the size of the wave shapes of the position, needing to be leveled, of the product; 2, positioning screws are tightened to fix the portal main plates; 3, the cross beam is inserted into the cross beam holes in the two portal main plates; and 4, the jack is placed between the cross beam and the leveling position.

The invention belongs to the field of welding, and relates to a welding method for stainless steel. The welding method comprises the following steps of: step I, forming a groove which is a double-Y-shaped groove; step II, checking whether a gap between welding root parts meets 0 or not, and checking whether a stainless steel jointed board is staggered or not; step III, checking and cleaning a welding bead, and coating the two sides of the welding bead by saturated limewater, and grinding and clearing a welding seam; step IV, welding, wherein the root parts of the double-Y-shaped groove are firstly welded, welding current of the root parts is controlled to be 430-460 A, electric-arc voltage is 30-32V, welding speed is 28-30m / h, and heat input is 1.48-1.98 KJ / mm; and welding the groove; andstep V, checking reverse molding, and performing sealing run. The welding method can effectively shorten a ship building period, reduces ship building cost, and reduces energy consumption.

The invention discloses a duplex fuel / lubricating oil filter, which comprises a body (1). A left filter chamber and a right filter chamber are arranged in the body (1); a plug core seat (5) is arranged between the two filter chambers; a plug core (13) is arranged in the plug core seat (5); a handle (10) connected with the plug core (13) is arranged outside the plug core seat (5), and can control the rotation of the plug core (13); an upper chamber and a lower chamber are arranged in the plug core (13); the upper chamber is communicated with an inlet of a pipeline; the lower chamber is communicated with an outlet of the pipeline; one side of the upper chamber and one side of the lower chamber are sealed, and the other sides of the upper and lower chambers are provided with channels communicated with the filter chambers; a filter cartridge (2) is arranged in the filter chambers; the inlet port of the filter cartridge (2) is communicated with the upper chamber of the plug core (13); and the inflow port of the filter cartridge (2) is communicated with the lower chamber of the plug core (13). The invention provides a duplex fuel / lubricating oil filter, which can ensure that the filter is cleaned or replaced under the condition of no halt.

A ship navigation signal lamp inspection method based on an unmanned aerial vehicle comprises the steps that reference lines at the two sides of a ship are drawn at the specific position of the ship under construction; the intersection point of the angle line and the reference line is the horizontal projection position of the unmanned aerial vehicle, the intersection points are drawn on the corresponding ground according to on-site lofting, and the intersection points A, A1, B, B1, B2, B3, C, C1, D and D1 are determined; the height value of each intersection point is determined according to the actual height of the navigation signal lamp; the intersection point and the height value are the accurate position of the unmanned aerial vehicle in the signal lamp inspection process; and a ship navigation signal lamp is turned on, the unmanned aerial vehicle is operated by a remote controller and flies to a pointed position, the angle adjustment position of the navigation signal lamp is determined through a video, the angle of the navigation signal lamp is adjusted according to the position of the unmanned aerial vehicle until the critical irradiation angle line of the navigation signal lamp coincides with the unmanned aerial vehicle, and the standard of qualified inspection is met. The unmanned aerial vehicle is used for inspection, and the method has the advantages of being high in efficiency, easy to operate, low in cost and high in safety.

The invention discloses a full rotation steering oar device installation method. A hull base of a full rotation steering oar which is installed in a trunk flange mode is cut into tapered unit bodies (indicated as the figure). The tapered unit bodies are transported to a workshop and high-precision mounting matching surfaces, screw holes and seal ring grooves are machined on the tapered unit bodies through a large vertical lathe. Next, the machined tapered unit bodies are lifted on a ship and replaced according to cutting steel marks and then the steering oar is installed so as to meet the requirement for shafting layout design, installation quality of the steering oar and sealing reliability. The full rotation steering oar device installation method abandons a traditional construction method, is labor-saving and effort-saving, improves work efficiency, and saves expensive tooling equipment investment. Secondly, the machined tapered unit bodies can be assembled with the steering oar, and then lifted on the ship and carries out replacement and installation. Installation quality and work efficiency of the steering oar are further improved and requirements of modern shipbuilding are met.

The invention discloses a transformation method for transforming a roll-on-roll-off ship into an inland river large-piece transport ship. The method comprises the following steps: assembling a forecastle of a left board piece body and a right board piece body at the bow end or the stern end, wherein the height of the forecastle is larger than or equal to 8 m, the distance between the forecastle and the outer edge of the bow end or the stern end is L1, and the forecastle is of a door type structure; disassembling the middle driving building of the roll-on-roll-off ship in a segmented mode; hoisting the detached middle driving building section to the forecastle, and performing mounting to form a side driving building; and arranging an anchoring platform and a mooring platform on the bow and the stern respectively, and keeping enough height between the mooring platform and a main deck so as to meet the requirement for arranging a bow chain locker, wherein an anchor chain can enter and exit from the chain locker smoothly during anchoring and weighing. An existing roll-on-roll-off ship is transformed into the inland river large-piece transport ship, an inland river large-piece transport ship berthing wharf does not need to be built again, large-piece transport can be completed through an existing roll-on-roll-off ship wharf, the problem of inland river large-piece transport is solved, and the shipbuilding cost is effectively reduced.

The invention discloses a precision control method for the lashing system of a container ship which is free from actual ship test. The theoretical distance between the foot and the lashing eye plate in the corresponding lashing bridge is compared with the measured distance, and the actual margin value of the lashing parts in the real ship is calculated, and the actual margin value of the lashing parts is always greater than the allowable minimum margin value by controlling , to realize that all the lashing eye panels on the ship meet the requirements, and will not cause interference between adjacent lashing parts, thereby effectively avoiding actual ship lashing tests, reducing shipbuilding costs, and shortening the shipbuilding cycle.

The invention discloses a low-voltage power supply and distribution method under a ship critical power station capacity. Four generators are arranged in a power station, a first busbar, a second busbar and a third busbar are arranged in the power station, the first busbar and the second busbar are respectively connected with one generator, and the third busbar is connected with two generators; the first busbar and the second busbar are connected through a first interconnection switch, and the second busbar and the third busbar are connected through a second interconnection switch; the power station supplies power to a plurality of conventional loads and specific loads; the conventional loads are connected to the first busbar or the second busbar; the specific load is connected to the third busbar; and the first interconnection switch is switched on, and the second interconnection switch is switched off. The maximum short-circuit capacity of the system can be effectively reduced, regional power supply is carried out on the load, and the power supply continuity of the power system is ensured.