CN118004364A - Manufacturing method of liquid tank saddle of medium-large liquid tank and liquid tank hoisting method - Google Patents

Abstract

The invention provides a manufacturing method of a saddle of a medium-and-large-sized liquid tank, which specifically comprises the following steps: s1, dividing a saddle assembly of a liquid tank; s2, machining a liquid tank saddle panel; s3, manufacturing a saddle jig frame of the liquid tank; s4, assembling and simulating calculation of the saddle of the single liquid tank; s5, measuring the assembly precision of the saddle assembly of the liquid tank; s6, assembling the saddle of the liquid tank in a sectioning stage; s7, sectionally folding the saddle of the liquid tank. According to the manufacturing method of the saddle of the liquid tank and the lifting method of the liquid tank, provided by the invention, the saddle precision is improved by combining the manufacturing method of the saddle of the liquid tank, the Leica three-dimensional laser scanning data collection and the comprehensive scanning of the liquid tank, the reworking caused by the saddle precision of the liquid tank lifting is reduced in the later period, and a great amount of personnel cost and the comprehensive cost of lifting reworking modification are avoided.

Description

Manufacturing method of liquid tank saddle of medium-large liquid tank and liquid tank hoisting method

Technical Field

The invention belongs to the technical field of ship manufacturing, and particularly relates to a manufacturing method of a saddle of a liquid tank of a medium-large liquid tank and a lifting method of the liquid tank.

Background

As environmental protection is more and more important, for ships with LNG liquid tanks, the problem that the precision of the saddle of the bottom structure of the large spherical liquid tank affects the precision of the liquid tank lifting is mainly solved for the ships, the safety accidents caused by the fact that the precision deviation of the liquid tank exceeds the standard in the operation process of the subsequent ships are reduced, in addition, the liquid tank construction precision control method and the liquid tank lifting method under different liquid tank forms are solved by combining different crane resources and different liquid tank structure forms in the dock of a shipyard, the safety risk of the shipyard in utilizing two gantry cranes is reduced, the two gantry cranes are connected integrally through a lifting beam, the collaborative operation capacity of the cranes is improved, and the liquid tank lifting precision is improved.

Disclosure of Invention

In order to solve the technical problems, the manufacturing method of the saddle of the liquid tank of the medium-large liquid tank and the lifting method of the medium-large liquid tank are combined with the manufacturing method of the saddle of the liquid tank, the three-dimensional laser scanning data collection of the liquid tank and the comprehensive scanning of the liquid tank, so that the saddle precision is improved, the reworking caused by the saddle precision of the liquid tank lifting in the later period is reduced, and a great amount of personnel cost and the comprehensive cost of lifting reworking modification are avoided.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The manufacturing method of the saddle of the liquid tank of the medium-large liquid tank specifically comprises the following steps:

S1, dividing a saddle assembly of a liquid tank: dividing the saddle of the liquid tank into 5 assembly areas according to the saddle structure form;

S2, processing a liquid tank saddle panel: cutting the panel number of each saddle assembly according to the saddle assembly dividing number of the liquid tank;

S3, manufacturing a liquid tank saddle jig frame: firstly, a liquid tank saddle panel is used as a base surface, a jig frame is made of the liquid tank saddle panel in an arc line shape, and a reference surface is provided for saddle member assembly;

s4, assembling and simulating calculation of the saddle assembly of the single liquid tank: discharging a liquid tank saddle panel positioning line on a liquid tank saddle jig frame, hoisting the liquid tank saddle panel, then installing a liquid tank saddle web plate and longitudinal reinforcing toggle plates at two sides on the liquid tank saddle panel, and finally installing barrier strips at two sides and barrier strip toggle plates; after the saddle is assembled, performing welding deformation simulation calculation to provide accurate welding control sequence for construction;

s5, measuring the assembling precision of the liquid tank saddle, scanning and measuring the end face of the liquid tank saddle assembly through the three-dimensional laser scanning of the Leica after the assembling of each liquid tank saddle is completed, collecting data, and then performing the assembling simulation assembly in the later stage of segmentation;

S6, sectional assembly of the saddle of the liquid tank: combining the measured three-dimensional data of each saddle assembly, and positioning and assembling in the inner bottom sections in sequence from the side to the middle; after the assembly is finished, marking the center line of the liquid tank on the panels of the fixed saddle and the movable saddle so as to facilitate the later-stage reference when the liquid tank is hoisted;

s7, sectionally folding the saddle of the liquid tank.

Further, in the step S5, three-dimensional data of each of the assembled end surfaces and the circular arc line shape of each of the assembled saddle panels are tracked by means of the three-dimensional laser scanning of the Leika, and analysis is performed in combination with the assembled end surface three-dimensional data.

Further, in the step S6, before the liquid tank saddle is positioned and assembled in a segmented manner, the bolt tooling of the liquid tank saddle is mounted on the inner bottom, the hoisting saddle is assembled in sequence, and in the positioning process, when the saddle deviates, the bolt tooling can be used for fine adjustment.

Further, in the step S7, when the folding is performed, the three-dimensional laser scanning of the Leica is utilized to collect the sectional section surface data and the open gear data of the liquid tank saddle, the sectional section surface data and the open gear data of the liquid tank saddle are utilized to perform simulation analysis, the auxiliary positioning is performed by combining the auxiliary point of the total station laser, and the folding patch tooling plate is utilized to position when the positioning is performed.

Further, in the step S7, after the liquid tank saddle is completely folded in sections, a detection line of the center line of the liquid tank saddle is found out, a steel wire is pulled above the liquid tank saddle, the whole circular arc data of the liquid tank saddle panel is measured, and the measured data is compared with the data measured by the liquid tank of a manufacturer to verify the radian of the saddle and the positioning accuracy of saddle assembly.

Further, in the step S1, the saddle is divided into two sets according to the saddle structure and the circular diameter of the saddle, and the whole conjoined saddle is divided into a middle set, and two sets on the left and right sides symmetrical to the middle set. Further, in the step S2, after finishing the counting and cutting, before processing, the center line, the inspection line, the tire positioning line on the panel, the longitudinal and transverse cross center line of the saddle panel, the panel processing inspection line and the positioning line for installing the stop head are discharged, and finally, the liquid tank saddle panel and the inspection template are processed, and after the liquid tank saddle panel is processed, whether deviation exists in the inspection points is retested, so that the arc precision of the saddle panel is improved.

Further, in the step S4, the form of the saddle jig for the liquid tank is based on the form of the saddle panel, the form is made into a component template, the component template is cut by cutting off the component template by a plurality of blanks, after the jig template is welded on the iron platform, baffles are arranged on two sides of the jig template to assist in positioning the toggle plates on two sides of the web plate, and in the later stage, whether the toggle plates are positioned correctly or not and whether the subsequent toggle plates are deformed obliquely or not is judged by measuring the distance between the baffles and the toggle plates; the detection method during component positioning is to project total station laser points to a positioning point of a measuring component, collect three-dimensional coordinate data of the component, collect all points to be measured, analyze all the collected three-dimensional points through software after the point to be measured is collected, and calculate whether data deviation exists between the three-dimensional coordinates and a drawing. Further, in the step S6, the segmented three-dimensional data is measured with the aid of a total station while the tank saddle is assembled in segments.

The method for hoisting the medium-sized and large-sized liquid tank on the liquid tank saddle manufactured according to the method comprises the following steps:

S8, through analysis and comparison of the appearance of the liquid tank and the simulation data of the saddle of the liquid tank, the difference value between the line type of the saddle and the line type of the liquid tank is ensured to be within a controllable range of +/-6 mm, and a liquid tank positioning chute tool piece is arranged on a hull structure of the longitudinal wall of the LNG cabin; a plurality of positioning measurement point marks in the height direction are made on the ship body structures corresponding to the periphery of the liquid tank;

S9, hanging the liquid tank above the LNG liquid tank cabin of the ship body through a special hanging beam, slowly falling through a crane, and accurately falling the liquid tank to a clamping groove of a saddle panel by utilizing a liquid tank positioning chute tool piece and a liquid tank guide rod when the liquid tank falls near a deck 3; scanning the horizontal data of the liquid tank by utilizing the Leica three-dimensional laser in the falling process of the liquid tank, and tracking and measuring; after the liquid tank enters the liquid tank saddle groove for the first time, 4 horizontal line detection line marks are respectively made at the liquid tank saddle structures at the two sides and used as horizontal reference basis when the liquid tank falls into the groove for the second time;

S10, carrying out second film pressing and can falling and third epoxy pouring and can falling of the liquid tank by adopting the same method as the step S9, carrying out full-scale measurement on the positioning measurement points marked by the hull structure and the horizontal data of the liquid tank body position through the three-dimensional laser scanning of the Leica, and finishing lifting of the liquid tank when the horizontal error of the liquid tank is +/-5 MM, the horizontal error of the liquid tank center is +/-2 MM and the horizontal error of the liquid tank clamping groove and the longitudinal stop of the saddle is +/-2 MM.

By adopting the manufacturing method of the saddle of the liquid tank, the saddle of the liquid tank is divided into 5 assembly areas, so that the saddle construction difficulty is reduced; adopting a special numerical control plasma cutting machine to cut the liquid tank saddle panels in 5 assembly areas simultaneously, so as to reduce lateral bending deformation; after the assembly of the saddle of the liquid tank is finished, performing welding deformation simulation calculation to provide accurate welding control sequence for construction; in the positioning process, when the saddle is deviated, the positioning precision of the saddle can be improved by utilizing the fine adjustment of the bolt tool piece; after the sectional installation of the saddle of the liquid tank is finished, when the liquid tank is in a folding stage, the length between each section and the opening of the saddle must be controlled because the liquid tank is up to 60M and spans 4 sections, so that when the liquid tank is folded, the three-dimensional laser scanning of the liquid tank is utilized to collect the sectional section surface data and the opening data of the saddle, the simulation analysis of the data is utilized, the auxiliary positioning is carried out by combining the auxiliary point of the total station laser, the auxiliary positioning is carried out, the auxiliary positioning is matched, the mounting plate is folded, and the precision of the saddle section is improved.

According to the manufacturing method of the saddle of the medium-large-sized liquid tank, the manufacturing precision of the saddle is effectively improved, the risk of lifting the liquid tank is reduced, and reworking due to the precision after lifting the liquid tank is avoided through the control of the steps of drawing design of the saddle of the liquid tank, assembly construction of a single saddle, assembly control of the saddle assembly in sections, open gear control of the saddle at the closing stage, safe lifting of the liquid tank and the like.

In the saddle processing stage, the panel processing precision is improved through the matching of the detection lines of the processed movable sample plates; the precision of the saddle panel is ensured through the jig frame template in the construction stage; because the saddle is a pressure-bearing base of the liquid tank, the thickness of the saddle component reaches 30-40 mm, welding software calculation is performed in advance to reduce welding deformation of thick plates, and the welding sequence is adjusted according to the calculated deformation value; the Leica three-dimensional laser scanning is utilized to collect and analyze data of each stage such as a whole saddle panel and a later-stage liquid tank hoisting level which are integrally assembled on the end face of a single saddle in a segmented pre-stage manner, so that the data chain analysis of the whole saddle is formed, and in order to enable the liquid tank to be hoisted into a tank for three times, the tool pieces are matched for use, and the multi-time positioning precision of the liquid tank is improved.

Drawings

FIG. 1 is a schematic view of the assembled division of a stationary tank saddle according to the present invention;

FIG. 2 is a schematic view of the assembled division of the movable tank saddle according to the present invention;

FIG. 3 is a schematic view of the processing of a single tank saddle panel according to the present invention;

FIG. 4 is a schematic drawing showing the linear inspection of a single saddle panel after machining according to the present invention;

FIG. 5 is a schematic view of the construction of a single tank saddle jig according to the present invention;

FIG. 6 is a schematic diagram of the assembly sequence and simulation calculation of a single tank saddle according to the present invention;

FIG. 7 is a schematic illustration of a segmented assembly control of a tank saddle according to the present invention;

FIG. 8 is a schematic view of the sectional assembly of the saddle for the liquid tank according to the present invention;

FIG. 9 is a port schematic view of the tank saddle of the present invention after staged folding;

FIG. 10 is a starboard schematic view of the saddle of the liquid tank of the present invention after staged folding;

FIG. 11 is a top view of the tank saddle of the present invention after staged folding;

FIG. 12 is a schematic view of the horizontal control of the lifting of the liquid tank according to the invention;

Fig. 13 is a schematic structural view of an auxiliary tool for entering a tank into a tank.

Wherein, 100-first HB01 saddle assembly, 101-second HB01 saddle assembly, 102-third HB01 saddle assembly, 103-fourth HB01 saddle assembly, 104-fifth HB01 saddle assembly; 105-HB 01 port anti-sloshing block; 106-HB 01 starboard shaking stopping block; 107-HB01 port barrier; 108-HB 01 starboard barrier; 100A-first HB04 saddle assembly, 101A-second HB04 saddle assembly, 102A-third HB04 saddle assembly, 103A-fourth HB04 saddle assembly, 104A-fifth HB04 saddle assembly, 105A-HB 04 port side sway stop; 106A-HB 04 starboard shaking stop block; 107A-HB 04 port rail; 108A-HB 04 starboard barrier; 201-a first saddle stop bar punching positioning point; the saddle is assembled and positioned on a line to be detected by a first saddle blocking strip and a second saddle blocking strip, wherein the first saddle blocking strip is provided with a first saddle blocking strip, the second saddle blocking strip is provided with a second saddle blocking strip, and the second saddle blocking strip is provided with a second saddle blocking strip; 301-a first jig template; 302-a second jig template; 303-a third jig template; 304-fourth jig templates; 305-fifth jig frame template; 307-web; 308-a tank saddle panel; 309-a first reinforcing toggle; 310-a second reinforcing toggle; 311-third reinforcing toggle plate; 312-fourth reinforcing toggle plate; 313-a fifth reinforcing toggle; 314-sixth reinforcing toggle plate; 315-seventh reinforcement toggle plate; 316-eighth reinforcing toggle plate; 501-HB01 double bottom; 502-HB04 double-layer bottom, 506-Leica three-dimensional laser scanning; 601-hull centreline; 602-a central line of the liquid tank; 603-positioning clamping plates; 605-a turnbuckle; 604-positioning plate; 801-guiding chute, 802-guiding rod, 803-guiding adjusting bolt.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific examples.

The manufacturing method of the saddle of the liquid tank of the medium-large liquid tank specifically comprises the following steps:

S1, dividing a saddle assembly of a liquid tank: dividing the saddle of the liquid tank into 5 assembly areas according to the saddle structure form;

S2, processing a liquid tank saddle panel: cutting the panel number of each saddle assembly according to the saddle assembly dividing number of the liquid tank;

S3, manufacturing a liquid tank saddle jig frame: firstly, a liquid tank saddle panel is used as a base surface, a jig frame is made of the liquid tank saddle panel in an arc line shape, and a reference surface is provided for saddle member assembly;

s4, assembling and simulating calculation of the saddle assembly of the single liquid tank: discharging a liquid tank saddle panel positioning line on a liquid tank saddle jig frame, hoisting the liquid tank saddle panel, then installing a liquid tank saddle web plate and longitudinal reinforcing toggle plates at two sides on the liquid tank saddle panel, and finally installing barrier strips at two sides and barrier strip toggle plates; after the saddle is assembled, performing welding deformation simulation calculation to provide accurate welding control sequence for construction;

s5, measuring the assembling precision of the liquid tank saddle, scanning and measuring the end face of the liquid tank saddle assembly through the three-dimensional laser scanning of the Leica after the assembling of each liquid tank saddle is completed, collecting data, and then performing the assembling simulation assembly in the later stage of segmentation;

S6, sectional assembly of the saddle of the liquid tank: combining the measured three-dimensional data of each saddle assembly, and positioning and assembling in the inner bottom sections in sequence from the side to the middle; after the assembly is finished, marking the center line of the liquid tank on the panels of the fixed saddle and the movable saddle so as to facilitate the later-stage reference when the liquid tank is hoisted;

s7, sectionally folding the saddle of the liquid tank.

In the step S5, three-dimensional data of each of the assembled end surfaces and the circular arc line shape of each of the assembled saddle panels are tracked by the three-dimensional laser scanning of the Leika, and analysis is performed in combination with the assembled end surface three-dimensional data.

In the step S6, before the liquid tank saddle is positioned and assembled in a segmented mode, bolt tooling pieces of the liquid tank saddle are mounted on the inner bottom, the saddle assembly is hoisted in sequence, and in the positioning process, when the saddle deviates, fine adjustment can be achieved through the bolt tooling pieces.

In the step S7, when the folding is performed, the three-dimensional laser scanning of the Leica is utilized to collect the sectional section surface data and the open gear data of the liquid tank saddle, the sectional section surface data and the open gear data of the liquid tank saddle are utilized to perform simulation analysis, the auxiliary positioning is performed by combining the auxiliary point of the total station laser, and when the positioning is performed, the folding patch tooling plate is utilized to position.

In the step S7, after the subsection of the liquid tank saddle is completely closed, a detection line of the center line of the liquid tank saddle is found out, a steel wire is pulled above the liquid tank saddle, the whole circular arc data of the liquid tank saddle panel is measured, and the circular arc data is compared with the data measured by a liquid tank of a manufacturer to verify the radian of the saddle and the positioning accuracy of saddle assembly.

In the step S1, the saddle is divided into two sets according to the saddle structure form and the circular diameter of the saddle, so that the saddle is assembled, and the whole conjoined saddle is divided into a middle set, and two sets on the left side and the right side which are symmetrical with respect to the middle set. Further, in the step S2, after finishing the counting and cutting, before processing, the center line, the inspection line, the tire positioning line on the panel, the longitudinal and transverse cross center line of the saddle panel, the panel processing inspection line and the positioning line for installing the stop head are discharged, and finally, the liquid tank saddle panel and the inspection template are processed, and after the liquid tank saddle panel is processed, whether deviation exists in the inspection points is retested, so that the arc precision of the saddle panel is improved.

In the step S4, the form of the liquid tank saddle jig is based on the line form of a saddle panel, the line form is made into a component template, the component template is cut by cutting off materials, after the jig template is welded on an iron platform, baffles are arranged on two sides of the jig template to assist in positioning toggle plates on two sides of a web plate, and in the later stage, whether the toggle plates are positioned correctly or not and whether the subsequent toggle plates are deformed obliquely or not is judged by measuring the distance between the baffles and the toggle plates; the detection method during component positioning is to project total station laser points to a positioning point of a measuring component, collect three-dimensional coordinate data of the component, collect all points to be measured, analyze all the collected three-dimensional points through software after the point to be measured is collected, and calculate whether data deviation exists between the three-dimensional coordinates and a drawing. Further, in the step S6, the segmented three-dimensional data is measured with the aid of a total station while the tank saddle is assembled in segments.

The method for hoisting the medium-sized and large-sized liquid tank on the liquid tank saddle manufactured according to the method comprises the following steps:

S8, through analysis and comparison of the appearance of the liquid tank and the simulation data of the saddle of the liquid tank, the difference value between the line type of the saddle and the line type of the liquid tank is ensured to be within a controllable range of +/-6 mm, and a liquid tank positioning chute tool piece is arranged on a hull structure of the longitudinal wall of the LNG cabin; a plurality of positioning measurement point marks in the height direction are made on the ship body structures corresponding to the periphery of the liquid tank;

S9, hanging the liquid tank above the LNG liquid tank cabin of the ship body through a special hanging beam, slowly falling through a crane, and accurately falling the liquid tank to a clamping groove of a saddle panel by utilizing a liquid tank positioning chute tool piece and a liquid tank guide rod when the liquid tank falls near a deck 3; scanning the horizontal data of the liquid tank by utilizing the Leica three-dimensional laser in the falling process of the liquid tank, and tracking and measuring; after the liquid tank enters the liquid tank saddle groove for the first time, 4 horizontal line detection line marks are respectively made at the liquid tank saddle structures at the two sides and used as horizontal reference basis when the liquid tank falls into the groove for the second time;

S10, carrying out second film pressing and can falling and third epoxy pouring and can falling of the liquid tank by adopting the same method as the step S9, carrying out full-scale measurement on the positioning measurement points marked by the hull structure and the horizontal data of the liquid tank body position through the three-dimensional laser scanning of the Leica, and finishing lifting of the liquid tank when the horizontal error of the liquid tank is +/-5 MM, the horizontal error of the liquid tank center is +/-2 MM and the horizontal error of the liquid tank clamping groove and the longitudinal stop of the saddle is +/-2 MM.

In this embodiment, as shown in fig. 1-2, the fixed tank saddle HB01 structure is divided into a first HB01 saddle assembly 100, a second HB01 saddle assembly 101, a third HB01 saddle assembly 102, a fourth HB01 saddle assembly 103 and a fifth HB01 saddle assembly 104 at the design stage, the movable tank saddle HB04 structure is divided into a first HB04 saddle assembly 100A, a second HB04 saddle assembly 101A, a third HB04 saddle assembly 102A, a fourth HB04 saddle assembly 103A and a fifth HB04 saddle assembly 104A, after the division of the five saddle assemblies is finished, the five saddle assemblies are decomposed into corresponding part figures, blanking is performed, after the blanking of all components is finished, the tank saddle panel is processed, before the processing, as shown in fig. 3, first saddle strip punch-down positioning points and 204 second punch-down positioning points of the two ends of the tank saddle panel are marked on a single tank saddle panel, so that the tank saddle strip is positioned, after the setting line of the tank saddle is finished, the punch-down line is well formed by using the punch-down line of the seat positioning line of the tank saddle 202 and the punch-down line of the saddle, after the inspection line is finished by using the corresponding part figures, and the punch-down line is finished by using the punch-down line of the test line is finished, and the die is finished by using the corresponding position of the test line is finished after the test line is finished, and the test plate is finished.

As shown in fig. 5, the first, second, third, fourth and fifth jig templates 301, 302, 303, 304, 305 are mounted to the flat iron platform, and after the jig templates are spliced, the tank saddle panel 308 is mounted on the saddle jig, and it is checked whether the tank saddle panel 308 is attached to the jig templates, the web 307 is hoisted, and the first, second, third, fourth, fifth, sixth, seventh and eighth reinforcing brackets 309, 310, 311, 314, 315 are slid down along the clamping grooves to position the saddle on both sides of the saddle, thereby completing the jig form and component assembly positioning process of the tank saddle assembly.

After the saddle component is assembled and positioned on the jig frame, the deformation trend of each component assembly is obtained by combining the calculated deformation amount through simulation calculation, so that the welding relation and the welding sequence among the components are determined.

As shown in fig. 6, the numbers ①、②、③、④ and ⑤ in the figure represent the welding sequence of the toggle plates on the saddle, according to the welding calculation analysis, the welding is performed as follows in the prefabrication for the single saddle assembly: (1) first welding the corner joint of web 307 and tank saddle panel 308; (2) The first 309, second 310, third 311, fourth 312, fifth 313, sixth 314, seventh 315 and eighth 316 reinforcing brackets on both sides of the saddle are all fillet welded to the web 307; (3) HB01 port rail 107 is fillet welded to panel 308; (4) the transverse stop 105 is fillet welded to the tank saddle panel 308.

After all of the 5 saddle assemblies of the fixed saddle and the movable saddle are assembled and welded, as shown in fig. 7 to 8, a first HB01 saddle assembly 100, a second HB01 saddle assembly 101, a third HB01 saddle assembly 102, a fourth HB01 saddle assembly 103 and a fifth HB01 saddle assembly 104 are mounted on the HB01 double-layer bottom 501, a HB01 port barrier 107 and a HB01 starboard barrier 108 are mounted in a positioning manner, after the positioning, whether the coordinate data of the scanning points are consistent with the drawing is checked by using the first-come three-dimensional laser scanning technique, the other movable saddle is positioned on the HB04 double-layer bottom 502 in the same manner, whether the coordinate points of the positioning of the two sets of the whole saddle assemblies HB01 and HB03 meet the drawing requirements is required after the positioning, and when the deviation is caused, the saddle assembly on the HB01 double-layer bottom 501 and the HB04 double-layer bottom 502 is adjusted according to the scanning data.

9-11, After the saddle on the double-layer bottom is assembled, in the folding stage, the HB02 saddle is hoisted and positioned in sections, the hull center line 601 and the tank center line 602 are discharged by means of HB01, HB03 and HB04, and the HB01, HB03 and HB04 are positioned rapidly by means of the cooperation of the positioning clamping plate 603, the spline bolt 605 and the positioning plate 604; the entire arced surface data of the HB04 saddle panel, the distance between HB04 port barrier rib 107A, HB and HB01 port barrier rib 108A of HB01 and HB01 starboard barrier rib 107, HB01 starboard barrier rib 108, and the entire arced surface data of the HB01 saddle panel were scanned by using 506 come-up three-dimensional laser. The number of the come cards is utilized to scan 506 three-dimensional laser, and the distances between the HB01 left side barrier strip 107, the HB01 starboard barrier strip 108 and the HB04 left side barrier strip 107A, HB and the starboard barrier strip 108A of HB04 are adjusted, so that the distance of opening gears among bearing trees of a liquid tank base is met, and a good saddle reference surface is provided for subsequent liquid tank hoisting.

As shown in fig. 12, the special hanging beam is utilized to hoist the hanging point A of the liquid tank through the connection of the hanging rope and the hanging beam 2, the electric hoist is hung in advance on the hanging point B of the liquid tank and the hanging beam 1, and the liquid tank is accurately positioned and adjusted to be used when the liquid tank is hoisted into the LNG cabin.

As shown in fig. 13, after the liquid tank is hoisted into the LNG cabin through the hanging beam, when the liquid tank is still 0.85m away from the saddle panel, a guiding chute 801 is installed on the transverse structural panel of the hull structure, and the liquid tank is slowly dropped into the saddle groove downwards through the cooperation of the auxiliary guiding rod, the guiding chute and the guiding adjusting bolt in combination with a guiding rod 802 and a guiding adjusting bolt 803 on the floating of the liquid tank.

The first liquid tank falls into the saddle groove, and the distances between the fixed and movable saddle bearing wood and HB01 port baffle 107, HB01 starboard baffle 108 and HB04 port baffle 107A, HB of HB04 and the distance between the liquid tank bearing wood groove and HB01 port stop and shake block 105, HB01 starboard stop and shake block 106 on the saddle panel and the hole position 119 of the left bearing wood below the double-ear liquid tank and the hole position 120 of the right bearing wood below the double-ear liquid tank are measured.

After the first liquid tank is measured at all intervals in the saddle groove, the liquid tank is lifted by 0.8m, pressing mould mud is uniformly placed on the surface of the saddle circular arc, then the liquid tank is dropped for the second time, the floating stopping level and front and back data of the periphery of the liquid tank are measured again, the liquid tank is lifted again, and the thickness of the pressing mould mud is measured.

The wooden strip is uniformly placed on the surface of the saddle circular arc, epoxy is uniformly cast onto the saddle circular arc panel, when the circular arc panel is cast, the epoxy is cast downwards from two ends of the panel, the epoxy thickness is measured to meet the requirement by combining the storage degree of the compression molding mud, the epoxy is stopped, finally, the liquid tank is dropped, the electric hoist on the lifting lug of the liquid tank is connected with the hanging point of the hull structure before the drop, fine adjustment is performed according to the drop precision of the liquid tank, and therefore the liquid tank can be ensured to completely drop into the saddle groove when the liquid tank drops for the third time, and the whole liquid tank process is completed.

Thereby through each preparation control to large-scale LNG jar structure has solved, follow-up liquid tank saddle precision is up to standard and the follow-up reworking that causes, has avoided the delay problem when boats and ships are handed over.

Those of ordinary skill in the art will appreciate that: the foregoing description of the embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. The manufacturing method of the saddle of the medium-large-sized liquid tank is characterized by comprising the following steps of:

S1, dividing a saddle assembly of a liquid tank: dividing the saddle of the liquid tank into 5 assembly areas according to the saddle structure form;

S2, processing a liquid tank saddle panel: cutting the panel number of each saddle assembly according to the saddle assembly dividing number of the liquid tank;

S3, manufacturing a liquid tank saddle jig frame: firstly, a liquid tank saddle panel is used as a base surface, a jig frame is made of the liquid tank saddle panel in an arc line shape, and a reference surface is provided for saddle member assembly;

s4, assembling and simulating calculation of the saddle assembly of the single liquid tank: discharging a liquid tank saddle panel positioning line on a liquid tank saddle jig frame, hoisting the liquid tank saddle panel, then installing a liquid tank saddle web plate and longitudinal reinforcing toggle plates at two sides on the liquid tank saddle panel, and finally installing barrier strips at two sides and barrier strip toggle plates; after the saddle is assembled, performing welding deformation simulation calculation to provide accurate welding control sequence for construction;

s5, measuring the assembling precision of the liquid tank saddle, scanning and measuring the end face of the liquid tank saddle assembly through the three-dimensional laser scanning of the Leica after the assembling of each liquid tank saddle is completed, collecting data, and then performing the assembling simulation assembly in the later stage of segmentation;

S6, sectional assembly of the saddle of the liquid tank: combining the measured three-dimensional data of each saddle assembly, and positioning and assembling in the inner bottom sections in sequence from the side to the middle; after the assembly is finished, marking the center line of the liquid tank on the panels of the fixed saddle and the movable saddle so as to facilitate the later-stage reference when the liquid tank is hoisted;

s7, sectionally folding the saddle of the liquid tank.

2. The method for manufacturing the saddle of the liquid tank of the medium-large liquid tank according to the claim 1 is characterized in that,

In the step S5, three-dimensional data of each of the assembled end surfaces and the circular arc line shape of each of the assembled saddle panels are tracked by the three-dimensional laser scanning of the Leika, and analysis is performed in combination with the assembled end surface three-dimensional data.

3. The method for manufacturing the saddle of the liquid tank of the medium-and-large-sized liquid tank according to claim 1, wherein in the step S6, before the liquid tank saddle is positioned and assembled in a segmented manner, bolt tooling pieces of the liquid tank saddle are mounted on an inner bottom, the saddle assembly is hoisted in sequence, and in the positioning process, when the saddle deviates, fine adjustment can be performed by the aid of the bolt tooling pieces.

4. The method for manufacturing the saddle of the liquid tank of the medium-and-large-sized liquid tank according to claim 1, wherein in the step S7, the three-dimensional laser scanning of the Leica is utilized to collect the sectional area data and the open gear data of the liquid tank saddle during the folding, the sectional area data and the open gear data of the liquid tank saddle are utilized to carry out simulation analysis, the auxiliary positioning is carried out by combining the auxiliary point of the total station laser, and the folding patch tooling plate is utilized for positioning during the positioning.

5. The method for manufacturing a saddle for a liquid tank for a medium-sized and large-sized liquid tank according to claim 1, wherein in the step S7, after the liquid tank saddle is completely folded, a detection line of the center line of the liquid tank saddle is found out, a steel wire is pulled above the liquid tank saddle, the whole circular arc data of the liquid tank saddle panel is measured, and the data is compared with the data measured by a liquid tank of a manufacturer to verify the positioning accuracy of the saddle radian and saddle assembly.

6. The method for manufacturing a saddle for a liquid tank of a medium-and-large-sized liquid tank according to claim 1, wherein in the step S1, the saddle is divided into two sets according to the saddle structure and the circular diameter of the saddle, and the whole conjoined saddle is divided into a middle set, and two sets on the left and right sides symmetrical to the middle set.

7. The method for manufacturing the saddle of the liquid tank of the medium-and-large-sized liquid tank according to claim 1, wherein in the step S2, after finishing the counting and cutting, a center line, a checking line, a positioning line for the upper tire of the panel, a cross center line for the longitudinal and transverse directions of the saddle panel, a positioning line for the panel processing checking line and the installation of a blocking head are discharged before processing, finally the liquid tank saddle panel and the checking template are processed, whether deviation exists in the checking points is retested after the liquid tank saddle panel is processed, and the arc precision of the saddle panel is improved.

8. The method for manufacturing the saddle for the liquid tank of the medium-and-large-sized liquid tank according to claim 1, wherein in the step S4, the form of the saddle jig of the liquid tank is based on the form of a saddle panel, the form of the saddle is made into a component template, the component template is cut off by cutting off the component template by a plurality of pieces, after the jig template is welded on a iron platform, baffle plates are arranged on two sides of the jig template to assist in positioning toggle plates on two sides of a web plate, and in the later stage, whether the toggle plates are positioned correctly or not and whether the subsequent toggle plates are deformed obliquely or not is judged by measuring the distance between the baffle plates and the toggle plates; the detection method during component positioning is to project total station laser points to a positioning point of a measuring component, collect three-dimensional coordinate data of the component, collect all points to be measured, analyze all the collected three-dimensional points through software after the point to be measured is collected, and calculate whether data deviation exists between the three-dimensional coordinates and a drawing.

9. The method for manufacturing a saddle for a medium-sized and large-sized liquid tank according to claim 1, wherein in said step S6, the segmented three-dimensional data is measured with the aid of a total station when said saddle for liquid tank is assembled in segments.

10. A method of suspending a medium-sized or large-sized tank from a tank saddle made by the method of any one of claims 1 to 9, comprising the steps of:

S8, through analysis and comparison of the appearance of the liquid tank and the simulation data of the saddle of the liquid tank, the difference value between the line type of the saddle and the line type of the liquid tank is ensured to be within a controllable range of +/-6 mm, and a liquid tank positioning chute tool piece is arranged on a hull structure of the longitudinal wall of the LNG cabin; a plurality of positioning measurement point marks in the height direction are made on the ship body structures corresponding to the periphery of the liquid tank;

S9, hanging the liquid tank above the LNG liquid tank cabin of the ship body through a special hanging beam, slowly falling through a crane, and accurately falling the liquid tank to a clamping groove of a saddle panel by utilizing a liquid tank positioning chute tool piece and a liquid tank guide rod when the liquid tank falls near a deck 3; scanning the horizontal data of the liquid tank by utilizing the Leica three-dimensional laser in the falling process of the liquid tank, and tracking and measuring; after the liquid tank enters the liquid tank saddle groove for the first time, 4 horizontal line detection line marks are respectively made at the liquid tank saddle structures at the two sides and used as horizontal reference basis when the liquid tank falls into the groove for the second time;

S10, carrying out second film pressing and can falling and third epoxy pouring and can falling of the liquid tank by adopting the same method as the step S9, carrying out full-scale measurement on the positioning measurement points marked by the hull structure and the horizontal data of the liquid tank body position through the three-dimensional laser scanning of the Leica, and finishing lifting of the liquid tank when the horizontal error of the liquid tank is +/-5 MM, the horizontal error of the liquid tank center is +/-2 MM and the horizontal error of the liquid tank clamping groove and the longitudinal stop of the saddle is +/-2 MM.