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

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 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 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 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.