CN109552557B - Segmentation division method for self-propulsion cutter suction dredger - Google Patents
Segmentation division method for self-propulsion cutter suction dredger Download PDFInfo
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Abstract
The invention discloses a segmental division method of a cutter suction dredger. The method mainly considers the structural characteristics and the installation requirements of the dredger, and divides a steel pile trolley track area, a bridge upper and lower hinge point area, a main machine base and a dredge pump base area into a subsection to avoid a large annular seam; the grooving corners of the steel pile trolley at the bow part, the rail area, the grooving corners of the tail structure, the bottom of the portal frame and the large opening corners of the deck are kept away from the sectional joints, so that the requirements of the steel pile trolley rail precision at the bow part, the bridge frame folding precision, the bridge frame trunnion precision, the structural strength requirements of the dredge pump base and the main generator base and the strength requirement of the steel pile grooving area at the bow part are met in the construction process and after the construction is finished.
Description
Technical Field
The invention relates to the field of ocean dredging engineering equipment and large ship construction, in particular to a segmentation division method for a self-propelled cutter suction dredger.
Background
The appearance of the segmented shipbuilding method is a milestone of shipbuilding technology. From this point on, the segmentation becomes the basic method of ship construction. How the ship body is divided into sections directly influences the whole construction process of the ship, and the division has a great influence on the construction period, the construction quality and the construction cost of the ship. Therefore, the hull section division method becomes a main factor for establishing a ship construction scheme and a construction guideline.
In the ship building process, the design work of segmentation division needs to be carried out simultaneously in the technical preparation stage and the initial stage of the detailed design stage, and the segmentation division result is brought into the detailed design drawing. The segmentation work needs to comprehensively consider various factors, especially the aspects of ship equipment and structural characteristics, equipment precision requirement, construction period, construction quality, construction cost and the like.
the cutter suction dredger is that soil at river bottom or sea bottom is loosened by rotating reamer and mixed with cement to form slurry, which is sucked into pump body via suction pipe and sent to sludge discharge area via sludge discharge pipe. When the cutter suction dredger is constructed, dredging, mud conveying and mud discharging are integrated, the self-completion is realized, and the production efficiency is higher.
The existing cutter suction dredger mainly comprises a main hull, a steel pile trolley, a bridge frame, an upper building living area and the like. The bridge structure is connected with the main hull structure through a connecting shaft, and the bridge structure can rotate around the connecting shaft relative to the main hull. The end part of the bridge frame is provided with a reamer head, and the mud is excavated through the rotation of the reamer head. According to the depth of the sea bottom (river bottom), the bridge is contacted with the sea bed (river bed) at a certain angle; the anchor is thrown from the stern part to two sides, and the dredger swings in a fan shape by pulling the anchor. When the cutter suction dredger works, the steel pile trolley extends the steel pile to the seabed (river bottom) so as to fix the ship body. The steel pile trolley can enable the dredger to move back and forth through the hydraulic mechanism.
The complexity of the equipment of the cutter suction dredger determines the structural complexity of the cutter suction dredger. Therefore, the equipment, the structural characteristics and the installation requirements of the cutter suction dredger need to be considered when the ship body is divided into sections, so that each section divided into the ship body sections meets the structural strength specification requirements and the precision specification requirements.
disclosure of Invention
the invention aims to provide a segmentation division method for a self-propelled cutter suction dredger. The segmentation division method emphasizes the consideration of the structural characteristics and the installation requirements of the self-propulsion cutter suction dredger, and also considers the factors of the rationality of the construction process, the hoisting and transporting capacity of a shipyard, the utilization rate of steel, the production safety, the balance and the like, so that the accuracy requirements of the bow steel pile trolley track, the bridge frame folding accuracy, the accuracy requirements of bridge frame trunnions, the structural strength requirements of a dredge pump base and a main generator base and the strength requirements of a bow steel pile slotting area are met in the construction process and after the construction is finished.
In order to achieve the purpose, the invention adopts the following technical scheme:
A method of sectionalizing hull sections for a self-propelled cutter suction dredger, wherein: the self-propelled cutter suction dredger comprises a main hull, a steel pile trolley, a bridge frame and an upper building living area, wherein the main hull comprises an upper deck layer, a main deck layer, a middle deck layer and an inner bottom layer; the bow part and the stern part of the main hull are both provided with slots; the steel pile trolley is arranged in a slot at the bow part of the main hull, and the bridge is arranged in a slot at the stern part of the main hull;
The steel pile trolley comprises a main steel pile trolley and an auxiliary steel pile trolley, a main steel pile trolley walking track is arranged in a main hull bow structure, the main steel pile trolley and the auxiliary steel pile trolley enable the self-propelled cutter suction dredger to move back and forth through a hydraulic mechanism, the main steel pile trolley and the auxiliary steel pile trolley respectively comprise a main steel pile and an auxiliary steel pile, when the cutter suction dredger works, the main steel pile trolley of the main hull bow is inserted into the sea bottom through a bow slotting and is inserted into the main steel pile, the main steel pile on the trolley is a working steel pile, and when the dredger works, a main steel column is inserted into the river bottom and is a rotating positioning point for swinging of the hull. The auxiliary steel piles are used for temporarily positioning the ship body when the working steel piles are displaced, the working steel piles need to be lifted away from the bottom of a river to be displaced after the ship body moves forwards for an effective stroke of a trolley travelling oil cylinder, the auxiliary steel piles are lowered to the bottom of the river to fix the ship position at the moment, the working steel piles are pulled to the rear limit points of the trolley in the grooves along with the trolley by the travelling oil cylinder, and then the auxiliary steel piles are lifted after the working steel piles are lowered, so that the dredging operation of the next trolley stroke is started, and the displacement of the cutter suction dredger is realized;
the bridge is connected with the main hull through the trunnion and rotates relative to the main hull through the trunnion, the bridge is provided with an upper hinge point and a lower hinge point, and the end part of the bridge is provided with a reamer;
a steel pile door is arranged on one side of a starboard of the bow of the main hull;
the segmentation division method comprises the following steps:
s1: dividing a main hull into 96 sections according to design specifications of hull section and total section division diagrams, structural characteristics and installation requirements of the dredger; wherein:
the upper deck includes: bow FD31P/S, FD32P/S, FD41P/S, FD33C and FD 51; middle and stern DH11P/S, DH12P/S, DH13P/S, DH15P/S, DH16P/S, DH17P/S, DH18P/S, DH 13C;
the main deck includes: bow FD21P/S, FD22P/S, FD41P/S, FD23C and FD 51; middle portions MD11P/S, MD12P/S, MD13P/S, MD14P/S, MD15P/S, MD11C, MD12C, MD13C, MD14C, MD 15C; the stern AD11P/S, AD22P/S, AD32P/S, AD52P/S, AD41P/S, AD 42C;
The middle deck includes: the bow parts FD11P/S, FD12P/S, FD13C and FD 51; middle parts ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, ED11C, ED12C, ED 13C; the stern AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD 41C;
The interior bottom plate includes: the bow FD11P/S, FD12P/S, FD 13C; middle ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, EB11C, EB12C, EB 13C; the stern AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD 41C;
the gantry segment includes AG 11;
The living area region segments comprise PD11, PD21, PD31, PD41 and PD 51;
s2: the structural characteristics and the installation requirements of the dredger are designed and standardized according to the ship body segmentation and total section division diagram, so that the stress concentration areas of the ship body at the positions of the steel pile trolley track, the bridge frame upper and lower hinge points, the main machine base and the dredge pump base are avoided from the annular large joint; wherein:
Dividing a main steel pile trolley track area into a subsection;
Dividing upper and lower trunnion point areas of the main hull corresponding to upper and lower hinge points of the bridge frame into the same segment, and forming independent semi-three-dimensional segments;
The base area of the dredge pump is divided into a complete double-layer bottom section,
The host base area is divided into a complete double-layer bottom section,
s3: designing and standardizing the structural characteristics and the installation requirements of the dredger according to the ship body segmentation and total segmentation drawing, so that the deck large-opening corner, the tail end of a host base longitudinal girder, the tail bridge structure slotted corner, the bottom of a portal frame, the bow steel pile trolley slotted corner and the segmentation of a stress concentration area of a ship body structure of a track are avoided from segmentation joints, wherein the hull is divided into sections;
Dividing the main structure of the portal frame above the upper deck layer into complete independent sections to ensure the overall strength of the portal frame;
placing the deck large opening corners in the upper deck layer at non-segmented seam locations;
arranging the corners of the slots of the stern bridge structure in the upper deck, the main deck, the middle deck and the inner bottom plate layer at the positions of the non-segmented joints;
Arranging slotting corners of the bow steel pile trolley in the main deck, the middle deck and the inner bottom plate layer at non-segmented joint positions;
The dredge pump openings and host machine opening corners in the middle deck floor are located at non-segmented seam locations.
According to the segmentation division method, the dredger has the structural characteristics that the dredger comprises a dredger body fore-aft opening groove, trunnions of a bridge and trunnion holes of a main dredger body, a steel pile trolley track, a dredge pump base, a main engine base and a portal frame structure;
The installation requirement includes that the bridge is integrally moved to the main hull for installation, and the installation gap between the bridge and the bearings and trunnions of the main hull is within 1.5 mm.
according to the segmentation division method, the design specifications of the hull segmentation and total segmentation drawing require that the annular large joint is prevented from being arranged at the stress position of the total strength or the local strength of the hull, and the structural stress concentration area is prevented from being arranged with the segmentation joint.
In the segmentation division method according to the present invention, the reference segment of 96 segments is the segment EB12C of the dredge pump area.
in the sectioning method according to the invention, the outer width of the broadside deck section MD11P/S-MD15P/S is made of a steel plate with the width of 3600 mm.
In the segment division method, the bridge frame has the length of 46 meters, the width of 8 meters and the height of 8-11, and the total weight including the weight of equipment is 1600 tons.
the segmental division method is characterized in that the shallowest digging depth of the upper hinge point of the bridge frame is 6.5 meters, and the largest digging depth of the lower hinge point of the bridge frame is 35 meters.
according to the segmentation division method, the steel pile trolley track is a U-shaped track, the track precision is +/-2 mm, main and auxiliary steel piles of the main and auxiliary steel pile trolley are respectively sharp-pointed solid steel columns with the diameters of 2.2 meters and the lengths of 55 meters, and the weight is 185 tons.
According to the segmentation division method, the cabin body area on the inner bottom plate layer is divided into three areas which respectively correspond to the auxiliary pump cabin, the main pump cabin and the cabin. According to the segmentation division method, the rail area of the main and auxiliary steel pile trolley is divided into a segment FD41P/S, and the segment extends from the upper deck layer to the middle deck;
the upper and lower trunnion point areas of the main hull are divided into a section AD41P/S which extends from the main deck up to the bottom of the vessel.
The process method of the invention completely meets the equipment, structural characteristics and installation requirements of the self-propelled cutter suction dredger, thereby shortening the whole construction period of the dredger, improving the construction quality and reducing the construction cost. The precision requirements of the bow steel pile trolley track, the bridge frame folding precision requirement and the bridge frame trunnion precision requirement are met in the construction process and after the construction, so that the structural strength near the dredge pump base and the main generator base meets the standard requirement, and the strength of the bow steel pile slotted area and the stern slotted area meets the standard requirement.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
FIG. 1 is a general layout of a self-propelled cutter suction dredger according to the invention; the steel pile trolley is arranged on the bow of the ship body, and the bridge is arranged on the stern of the ship body. The living area is arranged on the deck layer on the ship body. The dredge pump and the host are arranged on the bottom plate layer in the ship body.
fig. 2(a) is a side view of a bridge in the self-propelled cutter suction dredger of the present invention, and fig. 2(b) is a steel pile trolley travel rail.
FIG. 3(a) is a sectioned view of a hull section of the self-propelled cutter suction dredger of the present invention; FIG. 3(b) is a partial enlarged view of the section where the steering engine and stern shaft section AD21P/S and gantry section AG11 are located; FIG. 3(c) is a partially enlarged view of the portion where the broadside deck section MD11P/S-MD15P/S is located.
FIG. 4(a) is a sectioned view of the upper deck of the self-propelled cutter suction dredger of the present invention; FIG. 4(b) is an enlarged partial view of a portion of steel pile trolley rail section FD41P/S and steel pile door section FD51, the steel pile trolley rail section FD41P/S extending from the upper deck to the middle deck; the steel pile door section FD51 extends from the upper deck plate all the way to the inner bottom plate; the middle slotting area of the bow of the cutter suction dredger is a steel pile trolley arrangement and walking area which extends from the upper deck to the outer bottom plate;
FIG. 5(a) is a sectioned view of the main deck of the self-propelled cutter suction dredger of the present invention; FIG. 5(b) is an enlarged partial view of the portion of the main hull upper and lower trunnion point section AD41P/S corresponding to the bridge upper and lower trunnions, which extends from the main deck all the way to the bottom of the vessel; the bridge is arranged in the midship slotted region, which extends from the upper deck to the outer bottom plate.
FIG. 6(a) is a sectioned view of the middle deck of the self-propelled cutter suction dredger of the present invention; FIG. 6(b) is an enlarged partial view of the section AD21P/S where the steering engine is located, the section extending from the intermediate deck to the bottom of the vessel; the steering engine is arranged on the middle deck. The middle opening area in the middle of the main ship body is provided with an opening for the sludge pump and the main engine in the cabin.
FIG. 7(a) is a fragmented section view of the interior bottom panel of the self-propelled cutter suction dredger of the present invention; fig. 7(b) is a partially enlarged view of a portion of the section EB12C where the main machine is located and the intra-cabin sludge pump is located and the section EB 13C.
FIG. 8 is a superstructure living area of the main hull, including A-D decks, a drive deck, and a compass deck;
FIG. 9 is a layout view of the sludge pump and the main engine in the cabin; the middle part of the figure is an inner cabin area which is divided into three areas, namely a mud pump cabin, a mud pump motor cabin and a main engine cabin.
Fig. 10 is the segment numbers of 96 segments of a cutter suction dredger and their segment sizes.
in the drawings: 1 is the area where the broadside deck is segmented; 2, the area where the portal frame is segmented is shown; 3 is the area where the steering engine and the stern shaft are located in a subsection mode; 4, a section area where the steel pile trolley track is located; 5 is the area where the steel pile door is segmented; 6 is the area where the upper and lower trunnion points of the main hull are segmented; and 7 is the area of the section where the main engine is located and the section where the mud pump is located.
Detailed Description
The technical scheme of the invention is specifically explained in the following with the accompanying drawings of the specification.
the detailed features and advantages of the present invention are described in detail in the detailed description which follows, and will be sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention will be easily understood by those skilled in the art from the description, claims and drawings disclosed in the present specification.
The segmentation division method according to the invention is directed to large self-propelled cutter suction dredgers. The main and auxiliary steel pile trolleys are arranged on the bow of the dredger, and the auxiliary steel pile door is arranged on the side of the ship, so that the bow of the dredger is provided with a slot, and the main steel pile is inserted into the seabed. The steel pile trolley travelling rail is arranged in the bow structure and is a U-shaped rail, and the rail precision is required to be +/-2 mm. The main hull can move the dredger back and forth through the track. The tail part of the dredger is provided with a bridge, a trunnion is arranged on the bridge and is inserted into a bearing and a locking device which are arranged on the main ship body through the trunnion to be connected with the main ship body, so the tail part of the main ship body is also provided with a slot, and the bridge is integrally inserted into the slot.
When the cutter suction dredger works, the dredge pump and the generator vibrate greatly, so that a dredge pump base with a stronger structural form is arranged below the dredge pump, and a host base with a stronger structural form is also arranged below the generator set. The portal frame is arranged at the stern part of the dredger and above the slot of the bridge frame. The portal frame has the functions of lifting the bridge frame, supporting the reamer maintenance platform and the like.
Therefore, according to the segmentation division method for the self-propulsion cutter suction dredger, the structural characteristics and the equipment precision requirements of the bow portion open groove, the stern portion open groove, the bridge trunnion, the main hull upper trunnion hole, the steel pile trolley track, the dredge pump base, the main machine base, the portal frame structure and the like are considered during hull segmentation division.
Fig. 1 is a general layout view of a self-propelled cutter suction dredger according to the present invention.
as shown in fig. 1, the cutter suction dredger according to the present invention includes a main hull, a steel pile trolley, a bridge, and an upper-story building living area, in which: the main hull includes an upper deck level, a main deck level, a middle deck level, and an interior bottom level. The bow and the stern of the main hull are provided with slots.
The total length of the cutter suction dredger reaches 140.0 meters, the length of the dredger body is 121.5 meters, and the width of the dredger body is 27.8 meters.
one of the differences between the present invention and the existing cutter suction dredger is that; the steel pile trolley is arranged on the bow of the main hull, and the bridge is arranged on the stern of the main hull. The bridge frame for mounting the reamer head is mounted at the stern part of the main ship body, so that the slamming vibration of the ship body when the self-propelled cutter-suction dredger sails is greatly reduced, and the safety of the ship body structure is favorably ensured.
Fig. 2(a) shows a side view of the bridge of the stern of the main hull. According to the invention, the bridge is 46 meters long, 8 meters wide and 8-11 meters high, and the total weight including the equipment is 1600 tons.
another difference between the present invention and the existing cutter suction dredger is that: the bridge frame is provided with an upper hinge point and a lower hinge point, wherein the shallowest digging depth of 6.5 meters is realized through the upper hinge point, and the largest digging depth of 35 meters is realized through the lower hinge point. The reamer is arranged at the end part of the bridge frame, and the diameter of the reamer is 3.5 meters.
The invention is further different from the existing cutter suction dredger in that: the bridge frame is integrally transferred to the main hull stern portion slot from the dock track in a winch traction mode in cooperation with the jacking trolley. The clearance between the bridge and the ship body is within 13 mm.
The bridge is connected with the main hull through the trunnion and rotates relative to the main hull through the trunnion.
Fig. 2(b) shows the steel pile trolley travel track of the main hull bow.
According to an embodiment of the invention, the steel pile trolley comprises a main steel pile trolley and an auxiliary steel pile trolley. The bow structure of the main hull is provided with a main steel pile trolley travelling track which is a U-shaped track. The main and auxiliary steel pile trolleys move the self-propelled cutter suction dredger back and forth through a hydraulic mechanism. The main and auxiliary steel pile trolleys respectively comprise main steel piles and auxiliary steel piles. The main steel pile is inserted into the seabed through a slot on the bow of the main hull. The main steel pile and the auxiliary steel pile are respectively sharp-pointed solid steel columns with the diameter of 2.2 meters and the length of 55 meters, and the weight is 185 tons.
Fig. 4(a), 5(a), 6(a) show auxiliary pilar doors provided on the starboard side of the bow of the main hull, which can be opened and closed. This feature constitutes a further difference between the present invention and existing cutter suction dredgers. And when needed, the auxiliary steel column is inserted into the river bottom by opening the steel pile door.
According to the design specification of the ship body segmentation/total segment division diagram, the annular large seam is arranged at the stress position of the total strength or the local strength of the ship body to be avoided as much as possible.
In the self-propulsion cutter-suction dredger, the steel pile trolley rails, the upper and lower twisting points of the bridge, the main machine base, the dredge pump base and the sudden change positions of the sections of the ship beams are stress positions of the total strength or the local strength of the ship body, so that the positions are prevented from being provided with large annular seams.
In addition, according to the design specifications of the ship body section/total section division diagram, the areas with concentrated structural stress, such as the corners of a large opening of a deck, the tail end of an upper layer construction, the tail end of a main machine base longitudinal girder and the like, should be avoided from arranging section joints as much as possible.
in the self-propulsion cutter suction dredger, the corner of the large opening of the deck, the tail end of the longitudinal girder of the main machine base, the slotted corner of the tail structure, the bottom of the portal frame, the slotted corner of the bow steel pile trolley and the rail area are areas with concentrated structural stress, so that the areas are also prevented from being provided with segmented joints.
fig. 3 is a sectional view of a hull section of the cutter suction dredger according to the invention.
the main hull is divided into an upper deck level, a main deck level, a middle deck level and an inner bottom level.
The bow part of the main ship body is provided with a slot from the upper deck to the outer bottom plate, and the steel pile trolley is arranged at the bow part of the main ship body.
The stern part of the main hull is provided with a slot from the upper deck to the outer bottom plate, and the bridge is integrally inserted into the slot of the stern part of the main hull.
the portal frame is arranged above the stern part of the main hull and the slot of the bridge frame. The portal frame has the functions of lifting the bridge frame, supporting the reamer maintenance platform and the like.
The segmentation division method of the invention divides the dredger into 96 segments according to the design specification of the ship body segmentation and total segment division diagram, the structural characteristics and the installation requirement of the dredger, wherein:
the upper deck includes: bow FD31P/S, FD32P/S, FD41P/S, FD33C and FD 51; middle and stern DH11P/S, DH12P/S, DH13P/S, DH15P/S, DH16P/S, DH17P/S, DH18P/S, DH 13C;
The main deck includes: bow FD21P/S, FD22P/S, FD41P/S, FD23C and FD 51; middle portions MD11P/S, MD12P/S, MD13P/S, MD14P/S, MD15P/S, MD11C, MD12C, MD13C, MD14C, MD 15C; the stern AD11P/S, AD22P/S, AD32P/S, AD52P/S, AD41P/S, AD 42C;
The middle deck includes: the bow parts FD11P/S, FD12P/S, FD13C and FD 51; middle parts ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, ED11C, ED12C, ED 13C; the stern AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD 41C;
The interior bottom plate includes: the bow FD11P/S, FD12P/S, FD 13C; middle ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, EB11C, EB12C, EB 13C; the stern AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD 41C;
a gantry section AG11 above the upper deck level;
living area segments PD11, PD21, PD31, PD41, PD51 above the upper lamina armor.
As shown in FIG. 3, the section labeled "MD 11P/S-MD 15P/S" is a broadside deck section. According to the embodiment of the invention, in order to reduce the number of the steel plate abutted seams, the whole steel plate is selected as the outer plate of the shipboard deck section, special procurement of the steel plate is adopted, and the width of the steel plate is 3600mm, so that the strength of the shipboard strake meets the requirement of design specifications, and the workload of welding deformation and welding firer is reduced.
as shown in fig. 3(a), above the tail of the main hull, the section marked as "AG 11" is a gantry section, the gantry is arranged on the upper deck slab, and the gantry section is divided into a complete independent section according to the design specification of the hull section/total section division diagram, so as to ensure the overall strength of the gantry.
fig. 4 is a sectioned view of the upper deck of the cutter suction dredger according to the invention.
the segmentation of the upper deck layer comprises: FD31P/S, FD32P/S, FD41P/S, FD33C and FD51 of the bow; and mid and stern DH11P/S, DH12P/S, DH13P/S, DH15P/S, DH16P/S, DH17P/S, DH18P/S, DH 13C.
As shown in fig. 4, on both sides of the bow slot of the hull, the section marked as FD41P/S is the section where the steel pile trolley track is located, which extends from the upper deck up to the middle deck (see fig. 4-7). The steel pile trolley track is a U-shaped track, the requirement on the precision of the track is high, and the steel pile trolley track needs to be integrally manufactured. According to the embodiment of the invention, the track precision is +/-2 mm. According to the design specification of a ship body segmentation/total segment division diagram, the steel pile trolley track is divided into half independent three-dimensional segments, and the whole track area is divided into one segment.
The middle slotting area of the bow part is an area for arranging and walking the steel pile trolley, the arc-shaped corners of the area are stress concentration areas, and the segmented joints are prevented from being arranged at the arc-shaped corners as much as possible according to the CCS classification society specification.
At the starboard side of the bow of the hull, the section labeled "FD 51" is a steel pile door section that extends from the upper deck all the way to the inner bottom plate (see fig. 4-7). The piling bar door can be opened and closed as required. And dividing the steel pile door into independent sections according to the design specification of a ship body section/total section division diagram.
Fig. 5 is a sectioned view of the main deck of the cutter suction dredger according to the invention.
the main deck section comprises: FD21P/S, FD22P/S, FD41P/S, FD23C and FD51 of the bow; middle MD11P/S, MD12P/S, MD13P/S, MD14P/S, MD15P/S, MD11C, MD12C, MD13C, MD14C, MD 15C; the AD11P/S, AD22P/S, AD32P/S, AD52P/S, AD41P/S, AD42C of the stern is segmented.
as shown in fig. 5, on both sides of the stern grooving position of the main hull, the segment labeled "AD 41P/S" is the main hull up and down trunnion point segment corresponding to the bridge up and down hinge point, which extends from the main deck up to the bottom of the vessel (see fig. 5-7). The requirement on the dimensional accuracy between the upper and lower hinge points of the bridge and the upper and lower trunnion points of the main hull is very high. The mounting clearance of the bearing and the trunnion is within 1.5 mm. According to the design specification of a ship body segmentation/total segment division diagram, the upper trunnion point and the lower trunnion point of the main ship body are segmented in the same segment and are independent semi-three-dimensional segments.
The middle slotted area of the stern part is an area where a bridge structure is located, the arc-shaped corner part is a stress concentration area, and the section joints are prevented from being arranged at the area according to the design specification of a ship body section/total section division diagram.
fig. 6 is a sectional view of the middle deck of the cutter suction dredger according to the invention.
The intermediate deck section comprises: FD11P/S, FD12P/S, FD13C and FD51 of the bow; ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, ED11C, ED12C and ED13C in the middle; AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD41C of stern
as shown in FIG. 6, at the rear of the middle deck, the section labeled "AD 21P/S" is the section where the steering engine is located, from the middle deck to the inner bottom plate (see FIGS. 6 and 7). According to the design specification of a ship body segmentation/total segment division diagram, a steering engine base and a stern shaft are divided into independent segments so as to ensure that the guy wires of a shaft system and a rudder system are carried out in advance, and the intersection condition of the central line of the rudder system and the central line of the shaft system is checked. The steering engine is arranged on the middle deck.
in order to facilitate later period to hoist the dredge pump and the main engine into the cabin, the middle part of the middle deck comprises an opening of the dredge pump in the cabin and an opening of the main engine.
The four arc-shaped corners of the mud pump opening and the four arc-shaped corners of the main engine opening are stress concentration areas, and the segmented joints are prevented from being just opened on the arc-shaped corners according to the design specification of the ship body segmentation/total segment division diagram.
fig. 7 is a sectional view of the inner bottom plate of the cutter suction dredger according to the present invention.
The section of the inner bottom plate comprises; FD11P/S, FD12P/S, FD13C of the bow; middle ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, EB11C, EB12C, EB 13C; AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD41C of stern.
as shown in fig. 7, at the middle position of the inner bottom plate, the segment marked as "EB 13C" is the segment where the host computer in the cabin is located, the host computer is arranged on the inner bottom plate, and the host computer base is divided into a complete double-layer bottom segment according to the design specification of the ship body segment/total segment division diagram.
the section marked as EB12C is the section where the mud pump in the cabin is located, the mud pump in the cabin is arranged on the inner bottom plate, and the mud pump base is divided into a complete double-layer bottom section according to the design specification of a ship body section/total section division diagram.
The segmentation division method of the invention sets EB12C, which is the segmentation division of the dredge pump area, as a reference segment I, which is also called a positioning segment. When the ship body is installed and folded, the ship body can be folded from the middle reference section to the bow and the stern, and then folded from the lower layer to the upper layer, so that the construction period of the ship is shortened.
Fig. 8 is a sectional division view of the superstructure living area of the main hull, including an a deck, a B deck, a C deck, a D deck, a driving deck, and a compass deck, which correspond to the PD11, PD21, PD31, PD41, and PD51 sections, respectively, in fig. 3 (a).
Fig. 9 is a layout view of the mud pump and the main unit in the cabin.
The cabin comprises an auxiliary pump cabin, a pump cabin and a cabin, and the three cabins are divided into three areas.
according to the cutter suction dredger disclosed by the invention, the total assembly power is 25843 kilowatts, the dredge pump conveying power reaches 17000 kilowatts, and the remote conveying capacity reaches 15000 meters.
when the cutter suction dredger works, the dredge pump and the generator vibrate greatly, so that a dredge pump base with a stronger structural form is arranged below the dredge pump, and a host base with a stronger structural form is also arranged below the generator set.
In the cutter suction dredger of the invention, the stress position of the total strength or the local strength of the ship body comprises: the steel pile trolley track, the upper and lower hinge points of the bridge frame, the main machine base, the dredge pump base and the section sudden change part of the ship beam. The structural stress concentration region of the hull includes: the device comprises a deck large-opening corner, a tail end of a host machine base longitudinal girder, a tail structure notch corner, a portal frame bottom, a bow steel pile trolley notch corner and a rail.
the segmentation division method avoids arranging large annular joints at the stress positions of the total strength or the local strength of the ship body, and avoids arranging segmentation joints in the stress concentration areas of the ship body structure.
Fig. 10 lists the segment numbers of 96 segments and their segment sizes.
The segmentation method divides the self-propulsion cutter suction dredger body into 96 segments.
The segmentation division method of the invention conforms to the design specification of the ship body segmentation/total segment division diagram. According to the sectional division method of the cutter suction dredger, the circular large joint is avoided at the sudden change positions of the sections of the steel pile trolley track, the bridge frame upper and lower twisting points, the main machine base, the dredge pump base and the ship beam. Segmented joints are avoided at the corners of the large opening of the deck, the tail end of the longitudinal girder of the host machine base, the slotted corners of the tail structure, the bottom of the portal frame, the slotted corners of the bow steel pile trolley and the rail area.
The construction is carried out according to the segmented sections divided by the invention, the whole construction period of the ship can be shortened, the construction quality is improved, the construction cost is reduced, the precision requirement of a bow steel pile trolley track, the bridge frame folding precision requirement and the precision requirement between bridge frame trunnions are met, the structural strength near the dredge pump base and the main generator base meets the standard requirement, and the strength of a bow steel pile slotting area and a stern slotting area meets the standard requirement.
Finally, it should be noted that while the present invention has been described with reference to the specific embodiments thereof, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention, and various equivalent changes and substitutions may be made therein without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit and scope of the present invention be covered by the appended claims.
Claims (9)
1. A method for segmenting a hull segment of a self-propelled cutter suction dredger is characterized in that the self-propelled cutter suction dredger comprises a main hull, a steel pile trolley, a bridge and an upper building living area, wherein:
The main ship body comprises an upper deck layer, a main deck layer, a middle deck layer and an inner bottom layer;
The bow part and the stern part of the main hull are both provided with slots; the steel pile trolley is arranged at the bow part of the main hull, and the bridge is arranged at the stern part of the main hull;
The steel pile trolley comprises a main steel pile trolley and an auxiliary steel pile trolley, a main and auxiliary steel pile trolley walking track is arranged in a bow structure of the main ship body, the main steel pile trolley and the auxiliary steel pile trolley enable the self-propelled cutter suction dredger to move back and forth through a hydraulic mechanism, the main steel pile trolley and the auxiliary steel pile trolley respectively comprise a main steel pile and an auxiliary steel pile, and the main steel pile trolley of the bow of the main ship body is inserted into the seabed through a bow slotting and inserted into the main steel pile when the cutter suction dredger works, so that the cutter suction dredger is fixed and positioned;
the bridge is connected with the main hull through the trunnion and rotates relative to the main hull through the trunnion, the bridge is provided with an upper hinge point and a lower hinge point, and the end part of the bridge is provided with a reamer;
A steel pile door is arranged on one side of a starboard of the bow of the main hull;
The segmentation division method comprises the following steps:
S1: dividing a main hull into 96 sections according to design specifications of hull section and total section division diagrams, structural characteristics and installation requirements of the dredger; wherein:
The upper deck includes: bow FD31P/S, FD32P/S, FD41P/S, FD33C and FD 51; middle and stern DH11P/S, DH12P/S, DH13P/S, DH15P/S, DH16P/S, DH17P/S, DH18P/S, DH 13C;
the main deck includes: bow FD21P/S, FD22P/S, FD41P/S, FD23C and FD 51; middle portions MD11P/S, MD12P/S, MD13P/S, MD14P/S, MD15P/S, MD11C, MD12C, MD13C, MD14C, MD 15C; the stern AD11P/S, AD22P/S, AD32P/S, AD52P/S, AD41P/S, AD 42C;
The middle deck includes: the bow parts FD11P/S, FD12P/S, FD13C and FD 51; middle parts ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, ED11C, ED12C, ED 13C; the stern AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD 41C;
The interior bottom plate includes: the bow FD11P/S, FD12P/S, FD 13C; middle ED11P/S, ED12P/S, ED13P/S, ED14P/S, ED15P/S, EB11C, EB12C, EB 13C; the stern AD21P/S, AD31P/S, AD41P/S, AD51P/S, AD 41C;
the gantry segment includes AG 11;
The living area region segments comprise PD11, PD21, PD31, PD41 and PD 51;
s2: according to the design specifications of the ship body segmentation and total segment division diagrams and the structural characteristics and the installation requirements of the dredger, the ship body stress concentration areas at the positions of the main and auxiliary steel pile trolley walking track, the bridge frame upper and lower hinge points, the main machine base and the dredge pump base are enabled to avoid large annular joints; wherein:
Dividing a traveling track area of the main and auxiliary steel pile trolley into a subsection;
dividing upper and lower trunnion point areas of the main hull corresponding to upper and lower hinge points of the bridge frame into the same segment, and forming independent semi-three-dimensional segments;
The base area of the dredge pump is divided into a complete double-layer bottom section,
The host base area is divided into a complete double-layer bottom section,
S3: according to the design specifications of the ship body section and total section division drawing and the structural characteristics and the installation requirements of the dredger, the sections of the stress concentration areas of the ship body structure of the deck large-opening corner, the tail end of the host machine base longitudinal girder, the tail bridge structure slotted corner, the bottom of the portal frame, the bow steel pile trolley slotted corner and the main and auxiliary steel pile trolley travelling tracks are enabled to avoid section joints, wherein the section joints are formed by the sections;
Dividing the main structure of the portal frame above the upper deck layer into complete independent sections to ensure the overall strength of the portal frame;
Placing the deck large opening corners in the upper deck layer at non-segmented seam locations;
Arranging the corners of the slots of the stern bridge structure in the upper deck, the main deck, the middle deck and the inner bottom plate layer at the positions of the non-segmented joints;
Arranging slotting corners of the bow steel pile trolley in the main deck, the middle deck and the inner bottom plate layer at non-segmented joint positions;
the dredge pump openings and host machine opening corners in the middle deck floor are located at non-segmented seam locations.
2. The segmental division method for a hull segment of a self-propelled cutter-suction dredger according to claim 1,
The dredger has the structural characteristics that the dredger comprises a dredger body bow and stern part slot, trunnions of a bridge frame, trunnion holes of a main dredger body, a main and auxiliary steel pile trolley travelling track, a dredge pump base, a main engine base and a portal frame structure;
the installation requirement includes that the bridge is integrally moved to the main hull for installation, and the installation gap between the bridge and the bearings and trunnions of the main hull is within 1.5 mm.
3. The segmental division method for a hull segment of a self-propelled cutter-suction dredger according to claim 1,
The design specifications of the ship body subsection and total section division drawing require that the annular large joint is prevented from being arranged at the stress position of the total strength or the local strength of the ship body, and the section joint is prevented from being arranged in the region with concentrated structural stress.
4. The segmental division method for a hull segment of a self-propelled cutter-suction dredger according to claim 1,
The reference section of 96 segments is segment EB12C of the dredge pump area.
5. the sectioning method for a hull section of a self-propelled cutter-suction dredger according to claim 1, wherein the outboard width of the broadside deck section MD11P/S-MD15P/S is a steel plate having a width of 3600 mm.
6. The method for segmenting the hull segment of a self-propelling cutter suction dredger according to claim 1, wherein the bridge is 46 m long, 8 m wide, 8-11 m high and weighs 1600 tons.
7. the method for segmenting the hull segment of a self-propelling cutter suction dredger according to claim 4, wherein the upper hinge point of the bridge achieves a shallowest excavation depth of 6.5 meters and the lower hinge point of the bridge achieves a maximum excavation depth of 35 meters.
8. the segmental division method for the hull segment of the self-propelled cutter-suction dredger according to claim 1, wherein the traveling track of the main and auxiliary steel pile trolleys is a U-shaped track with a precision of ± 2mm, and the main and auxiliary steel piles of the main and auxiliary steel pile trolleys are respectively sharp-pointed solid steel columns with a diameter of 2.2 meters and a length of 55 meters, and weigh 185 tons.
9. The segmental division method for a hull segment of a self-propelled cutter-suction dredger according to claim 1,
The cabin body area on the inner bottom plate layer is divided into three independent areas which respectively correspond to the auxiliary pump cabin, the main pump cabin and the cabin.
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| CN114148471B (en) * | 2021-12-15 | 2023-04-28 | 上海振华重工启东海洋工程股份有限公司 | Bridge frame transferring technology |
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| CN101811553B (en) * | 2010-03-05 | 2012-07-18 | 南通港闸船舶制造有限公司 | Preparation and on-board installation process of bridge of cutter suction dredger |
| CN103910028A (en) * | 2014-04-15 | 2014-07-09 | 南通长航船舶配件有限公司 | Segment dividing method for self-propelled drag suction dredger ship building |
| CN104085501A (en) * | 2014-06-23 | 2014-10-08 | 南通港闸船舶制造有限公司 | Segmental construction method for cutter suction dredger |
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