A dual-fuel container ship side section precision control method and side section

Abstract

The application relates to a kind of dual-fuel container ship side section precision control method and side section, which divides the side section of dual-fuel container ship into double-bottom segment, platform plate group, side section middle group, inclined side plate middle group and bulkhead middle group, respectively, to construct by plate assembly, and the main dimension, levelness, internal component perpendicularity and flatness after welding of each part are monitored during the construction process; the installation position line of platform plate group, inclined side plate middle group and bulkhead middle group is drawn on double-bottom segment, and platform plate group is installed in sequence, then side section middle group, inclined side plate middle group and bulkhead middle group are installed, the corner joint simulation is carried out before the installation of inclined side plate middle group and bulkhead middle group, and finally, section knee plate is installed at the angle position between platform plate group and double-bottom segment. Through the precision control method of the application, the construction of the side section of dual-fuel container ship is carried out, the precision is controlled during the construction process, and the precision of the side section of dual-fuel container ship after final assembly is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shipbuilding, in particular to a double-fuel container ship side section precision control method and side section. BACKGROUND

[0002] Currently, a double-fuel double-power design is adopted in the construction of a container ship. The double-fuel ship uses clean energy LNG as the main power fuel, which can meet the regulations on the emission of atmospheric pollutants of the ship, including sulfide, carbon dioxide, etc. The fuel tank manufacturing is an important part of the construction of the double-fuel ship, which is composed of several sections. The precision of the section manufacturing directly affects the manufacturing precision of the entire fuel tank. SUMMARY

[0003] In order to ensure the precision of the double-fuel container ship side section, the present application provides a double-fuel container ship side section precision control method and side section. The precision control method improves the precision after the construction is completed and reduces the rework.

[0004] The technical purpose of the present application is achieved by the following technical scheme:

[0005] A double-fuel container ship side section precision control method divides the double-fuel container ship side section into a double-bottom section, a platform plate group, a side section, an inclined side plate group, and a bulkhead group. The method comprises the following steps:

[0006] Step 1: According to the section construction drawing, a jig and an angle ruler line are made. The double-bottom section, the platform plate group, the side section, the inclined side plate group, and the bulkhead group are respectively assembled on the jig. During the construction process, the main dimension, the levelness, the perpendicularity of the internal components, and the flatness after welding of each part are monitored. The main dimension is left with +5mm shrinkage before welding, the perpendicularity is controlled within 5mm, the levelness is controlled within ±5mm, and the parts exceeding the precision requirements are corrected according to the monitoring situation.

[0007] Step 2: The installation position line of the platform plate group, the inclined side plate group, and the bulkhead group is drawn on the double-bottom section. According to the installation position line of the platform plate group, the platform plate group is installed on the double-bottom section.

[0008] Step 3: The side section is installed on the platform plate group. After the angle joint simulation of the inclined side plate group and the bulkhead group, the inclined side plate group is installed on the double-bottom section according to the installation position line of the inclined side plate group. The inclined side plate group is connected with the side section.

[0009] Step 4: The bulkhead group is installed based on the installation position line of the inclined side plate group and the bulkhead group. The bulkhead group is connected with the end of the inclined side plate group, the side section, and the platform plate group.

[0010] Step 5: Install the segmented elbow plate at the angle between the platform plate group and the double bottom segment.

[0011] Furthermore, the double-layer sole segment includes an outer sole plate and an inner sole plate assembly. The outer sole plate and the inner sole plate assembly are assembled on a jig. After the assembly is completed, the angular dimensions are controlled within ±1mm, the end face of the assembly is controlled within ±2mm, and the squareness is controlled within 3mm. The inner sole plate assembly is flipped and assembled onto the outer sole plate to form the double-layer sole segment.

[0012] Furthermore, the oblique side plate group includes an oblique side plate, a platform plate, and a longitudinal wall plate. The longitudinal wall plate and the platform plate are assembled perpendicularly to each other to form a group, which is then combined with the oblique side plate to form the oblique side plate group. The intersection of the three surfaces of the oblique side plate, the platform plate, and the longitudinal wall plate forms the first node, and the straightness of the first node is controlled within 5mm.

[0013] Furthermore, in step 3, the verticality of the side mid-section assembly installed on the platform plate group is controlled within ±5mm; the corner joint between the oblique side plate mid-section assembly and the double bottom segment forms a second node, and the second node is aligned with the installation position line of the oblique side plate mid-section assembly, with the deviation controlled within 3mm; the end face overlap between the oblique side plate mid-section assembly and the side mid-section assembly is controlled within 5mm; and the horizontal distance error between the second node and the first node is controlled within 5mm.

[0014] Furthermore, when simulating the corner joints of the oblique side plate assembly and the compartment assembly, several position measurement points are selected on one side of the oblique side plate assembly that connects to the compartment assembly. The same number of levelness measurement points are selected in the corresponding position measurement points in the area where the compartment assembly connects to the oblique side plate assembly. The levelness measurement points and position measurement points correspond one-to-one. The spacing error between the simulated position measurement points and the corresponding levelness measurement points is calculated to see if it meets the accuracy requirements. Any part exceeding the accuracy requirements is corrected in time.

[0015] Furthermore, starting from the top of the middle group of the oblique side plate, several position measurement points are selected at equal intervals; starting from the top of the middle group of the compartment, several levelness measurement points are selected at equal intervals, and the distance between adjacent position measurement points is equal to the spacing between adjacent levelness measurement points.

[0016] Calculate the deviation X between the actual position and the theoretical position of each measurement point. If the actual position of the measurement point exceeds the theoretical position, X is positive; if the actual position of the measurement point does not reach the theoretical position, X is negative.

[0017] A horizontal baseline is formed using the first and last horizontal measurement points on the middle section of the compartment as references. The distance between the horizontal measurement point between the first and last horizontal measurement points and the horizontal baseline is Y. Y is positive when the horizontal measurement point is outside the horizontal baseline and negative when the horizontal measurement point is inside the horizontal baseline.

[0018] Calculate the sum of X and Y of the position measurement point and the corresponding levelness measurement point. If X + Y ≤ 5 mm, it meets the corner joint error requirements.

[0019] Furthermore, the method also includes drawing a 100MK inspection line at the tail of the diagonal plate group based on the position measurement point. When drawing the line, the position measurement point is used as the reference, and several points are determined along the position measurement point offset by 100+X. These points are then connected to form the 100MK inspection line.

[0020] Furthermore, during the installation of the compartment mid-assembly, the distance between the compartment mid-assembly and the 100MK inspection line is controlled within 100±5mm.

[0021] The present invention also provides a side section for a dual-fuel container ship, including a double bottom segment, a platform plate group, a side mid-section group, a diagonal plate mid-section group, and a compartment mid-section group. The above-mentioned precision control method for the side section of a dual-fuel container ship is constructed by mounting the platform plate group, the side mid-section group, the diagonal plate mid-section group, and the compartment mid-section group onto the double bottom segment.

[0022] Compared with the prior art, the beneficial effect of the present invention is that the construction of the side sections of the dual-fuel container ship is carried out through the precision control method of the present invention. Through precision control during the construction process, the precision of the side sections of the dual-fuel container ship after final assembly is met. Theoretically, the higher the precision of each part, the higher the precision of the final assembled side sections. However, in actual production, it is impossible to guarantee that each part is free of errors. Through reasonable error control and construction process, the precision and quality after construction are guaranteed. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the side-section assembly of a dual-fuel container ship in this invention.

[0024] Figure 2 This is a schematic diagram illustrating the squareness calculation of the panels in an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram showing the installation position lines on the double-layer bottom segment in this invention.

[0026] Figure 4 This is a schematic diagram simulating the corner joint of the oblique side plate group and the compartment group in this invention.

[0027] Figure 5 This is a schematic diagram of the horizontal distance between the first node and the second node in this invention.

[0028] In the diagram, 1. Double bottom segment; 2. Platform plate group; 3. Side mid-section group; 4. Side plate mid-section group; 5. Compartment mid-section group; 6. Segment elbow plate; 11. Outer bottom plate; 12. Inner bottom plate mid-section group; 13. Platform plate group installation line; 14. Side plate mid-section installation line; 15. Compartment mid-section installation line; 41. Platform plate; 42. Longitudinal bulkhead plate; 43. Side plate; 44. First node; 45. Second node. Detailed Implementation

[0029] The technical solution of the present invention will be further described below with reference to specific embodiments:

[0030] A type of dual-fuel container ship side section, such as Figure 1 As shown, it includes a double bottom segment 1, a platform plate group 2, a side midsection group 3, a diagonal plate midsection group 4, and a bulkhead midsection group 5. The fuel tank side section is divided into port and starboard (P / S sides). Taking the port P side section as an example, the construction includes the following steps:

[0031] Step 1: According to the segmented construction process drawings, fabricate the jig and angle ruler lines. The double-layer bottom segment 1, platform plate group 2, side mid-section group 3, oblique side plate mid-section group 4, and compartment mid-section group 5 are assembled on the jig respectively. During the construction process, the main dimensions, levelness, verticality of internal components, and flatness after welding of each part are monitored. Before welding, a shrinkage allowance of +5mm is left for the main dimensions. The verticality is controlled within 5mm and the levelness is controlled within ±5mm. The parts that exceed the accuracy requirements are corrected according to the monitoring results.

[0032] The double-bottom segment 1 includes an outer bottom plate 11 and an inner bottom plate mid-section 12. The outer bottom plate 11 and the inner bottom plate mid-section 12 are assembled on a jig. When assembling the outer bottom plate, the bow end and the midship center are used as reference edges. For areas with linear sections, assembly is performed according to angle lines. After assembly, the angular dimensions are controlled within ±1mm, the end face accuracy within ±2mm, and the squareness within 3mm. The inner bottom plate mid-section is then flipped and assembled onto the outer bottom plate to form the double-bottom segment. Squareness is the difference between the two diagonals, such as... Figure 2 As shown, the difference between diagonals L1 and L2 is the squareness.

[0033] The oblique panel group includes oblique panel 43, platform panel 41, and longitudinal wall panel 42. The longitudinal wall panel 42 and platform panel 41 are assembled perpendicularly to each other to form a group, which is then combined with oblique panel 43 to form oblique panel group 4. The accessories on the back of oblique panel 43 are installed with oblique panel 43 as the base surface. The intersection of the three surfaces of oblique panel 43, platform panel 41 and longitudinal wall panel 42 forms the first node 44. The straightness of the first node 44 is controlled within 5mm.

[0034] Step 2: Draw the platform panel assembly installation line 13, the diagonal side panel assembly installation line 14, and the compartment assembly installation line 15 on the double-layer bottom segment, respectively. Figure 3 As shown, according to the installation position line of platform board group 13, platform board group 2 is first installed on double bottom segment 1.

[0035] Step 3: Install the side midship group 3 on the platform plate group 2. The verticality of the side midship group 3 on the platform plate group 2 is controlled within ±5mm. Before installation, the corner joint simulation is performed on the oblique side plate midship group 4 and the compartment midship group 5. During the corner joint simulation, select several position measurement points on the side of the oblique side plate midship group that connects to the compartment midship group. Select the same number of horizontal measurement points in the corresponding position measurement points in the area where the compartment midship group connects to the oblique side plate midship group. Starting from the top of the oblique side plate midship group, select several position measurement points at equal intervals. Starting from the top of the compartment midship group, select several horizontal measurement points at equal intervals. The distance between adjacent position measurement points is equal to the spacing between adjacent horizontal measurement points. The horizontal measurement points and position measurement points correspond one-to-one.

[0036] Calculate the deviation X between the actual position and the theoretical position of each measurement point. If the actual position of the measurement point exceeds the theoretical position, X is positive; if the actual position of the measurement point does not reach the theoretical position, X is negative.

[0037] A horizontal baseline is formed using the first and last horizontal measurement points on the middle section of the compartment as references. The distance between the horizontal measurement point between the first and last horizontal measurement points and the horizontal baseline is Y. Y is positive when the horizontal measurement point is outside the horizontal baseline and negative when the horizontal measurement point is inside the horizontal baseline.

[0038] Calculate the sum of X and Y of the position measurement point and the corresponding levelness measurement point. If X + Y ≤ 5 mm, it meets the corner joint error requirements.

[0039] Specifically, such as Figure 4As shown, on the oblique side plate of the oblique side plate group, a position measurement point is selected every 1m starting from the top of the oblique side plate group, and marked as point A, point B, point C, point D, and point E respectively. The position deviation X of point A, point B, point C, point D, and point E is obtained by comparing them with their theoretical positions (referred to as: X1, X2, X3, X4, and X5 respectively). If the actual position of point A exceeds the theoretical position, X1 is recorded as a positive value; if the actual position of point A does not reach the theoretical position, X1 is recorded as a negative value.

[0040] On the middle section of the compartment, starting from the top opening of the middle section, select a levelness measurement point a, b, c, d, and e every 1m. Using points a and e as references, connect points a and e to form a horizontal reference line. The levelness deviation of points a, b, c, d, and e from the horizontal reference line is denoted as Y (respectively: Y1, Y2, Y3, Y4, and Y5). The levelness of Y1 and Y5 is 0. If point b protrudes relative to the horizontal reference line, Y2 is positive; otherwise, Y2 is negative.

[0041] During later assembly, points A and a, B and b, C and c, D and d, and E and e are theoretically supposed to coincide. If both X and Y values ​​are positive, it means that both points have margin, resulting in a larger error after stacking. If X + Y ≤ 5mm, the error is within the allowable range; otherwise, margin trimming is required. If X and Y values ​​are one positive and one negative, it means that one point has margin while the other has not reached its position. The two will compensate for each other after stacking. If the error still exceeds 5mm after compensation, margin trimming is also required. If both X and Y values ​​are negative, it means that neither point has reached its position and no trimming is needed, but appropriate filling is required to ensure successful assembly later.

[0042] After the corner joint simulation is completed, the oblique side plate mid-assembly 4 is installed on the double bottom segment 1 according to the oblique side plate mid-assembly installation position line 14. The oblique side plate mid-assembly 4 is connected to the side mid-assembly 3. The corner joint between the oblique side plate mid-assembly 4 and the double bottom segment 1 forms a second node 45. The second node 45 is aligned with the oblique side plate mid-assembly installation position line 14, and the deviation is controlled within 3mm. The end face overlap between the oblique side plate mid-assembly 4 and the side mid-assembly 3 is controlled within 5mm. The horizontal distance error between the second node 45 and the first node 44 is controlled within 5mm. Figure 5 As shown.

[0043] Based on the position measurement points, a 100MK inspection line is drawn at the tail of the diagonal plate mid-assembly to provide a reference for the installation of subsequent compartment mid-assemblies. During the drawing process, several points are determined along a 100+X offset from the position measurement points, using the position measurement points as a reference. Connecting these points forms the 100MK inspection line. Figure 4 As shown.

[0044] Step 4: Install the bulkhead mid-section 5 using the installation position line 15 of the diagonal plate mid-section 4 and the bulkhead mid-section 4 as a reference. The bulkhead mid-section 5 is connected to the ends of the diagonal plate mid-section 4, the side mid-section 3, and the platform plate mid-section 2. The distance between the bulkhead mid-section and the 100MK inspection line is controlled within 100±5mm.

[0045] Step 5: Install the segmented elbow plate 6 at the angle between the platform plate group 2 and the double bottom segment 1.

[0046] Complete the precision control of all side sections on the port and starboard sides using the method described above.

[0047] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. Those skilled in the art can make non-inventive modifications to this embodiment as needed after reading this specification, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method of controlling the accuracy of a dual-fuel container ship side section, characterized by, The method comprises the following steps: Step 1, according to the subassembly construction process drawing, a jig and an angle ruler line are made, and the double-bottom segment, the platform plate group, the side group, the diagonal side plate group and the bulkhead group are respectively assembled on the jig, and during the assembly process, the main dimension, the levelness, the verticality of the internal components and the flatness after welding of each part are monitored, the main dimension is left with +5mm shrinkage before welding, the verticality is controlled within 5mm, the levelness is controlled within ±5mm, and the parts exceeding the accuracy requirements are corrected according to the monitoring situation; Step 2, the installation position line of the platform plate group, the diagonal side plate group and the bulkhead group is drawn on the double-bottom segment, and the platform plate group is installed on the double-bottom segment according to the installation position line of the platform plate group; Step 3, the side group is installed on the platform plate group, the diagonal side plate group and the bulkhead group are simulated after the corner joint, then the diagonal side plate group is installed on the double-bottom segment according to the installation position line of the diagonal side plate group, the diagonal side plate group is connected with the side group, when the corner joint of the diagonal side plate group and the bulkhead group is simulated, a plurality of position measurement points are selected on the side of the diagonal side plate group abutting against the bulkhead group, and a same number of levelness measurement points are selected at the corresponding positions of the bulkhead group abutting against the diagonal side plate group, the levelness measurement points and the position measurement points are one-to-one corresponding; whether the spacing error between the simulation position measurement point and the corresponding levelness measurement point when abutting against each other meets the accuracy requirement is calculated, and the parts exceeding the accuracy requirement are corrected in time, a plurality of position measurement points are selected at equal intervals from the upper opening of the diagonal side plate group as a starting point; a plurality of levelness measurement points are selected at equal intervals from the upper opening of the bulkhead group as a starting point, and the distance between adjacent position measurement points is equal to the spacing between adjacent levelness measurement points; The deviation X between the actual position and the theoretical position of each position measurement point is calculated, the actual position of the position measurement point exceeds the theoretical position, and X is a positive value, and the actual position of the position measurement point does not reach the theoretical position, and X is a negative value; The first levelness measurement point and the last levelness measurement point of the bulkhead group form a horizontal reference line, the distance between the position of the levelness measurement point between the first levelness measurement point and the last levelness measurement point and the horizontal reference line is Y, the levelness measurement point is located on the outside of the horizontal reference line, and Y is a positive value, and the levelness measurement point is located on the inside of the horizontal reference line, and Y is a negative value; X+Y≤5mm is calculated, and if X+Y≤5mm, the corner joint error requirement is met; Step 4, the bulkhead group is installed according to the installation position line of the diagonal side plate group and the bulkhead group, and the end of the bulkhead group is connected with the diagonal side plate group, the side group and the platform plate group; Step 5, the subassembly knee plate is installed at the included angle position between the platform plate group and the double-bottom segment.

2. A method of controlling the accuracy of a double fuel container ship side section according to claim 1, characterized in that, The double bottom segment comprises an outer bottom plate and an inner bottom plate, the outer bottom plate and the inner bottom plate are respectively assembled on a jig, the angle scale of the assembled plates is controlled within ±1mm, the end surface of the assembled plates is controlled within ±2mm, and the squareness is controlled within 3mm, and the inner bottom plate is assembled on the outer bottom plate to form the double bottom segment.

3. A method of controlling the accuracy of a double fuel container ship side section according to claim 2, characterized in that, The diagonal side plate segment comprises a diagonal side plate, a platform plate and a vertical wall plate, the vertical wall plate and the platform plate are assembled to form a small group, and then combined with the diagonal side plate to form the diagonal side plate segment, the first node is formed at the intersection of the three surfaces of the diagonal side plate, the platform plate and the vertical wall plate, and the straightness of the first node is controlled within 5mm.

4. The method of claim 3, wherein, In the step 3, the verticality of the side bulkhead segment installed on the platform plate small group is controlled within ±5mm, the second node is formed at the angle joint between the diagonal side plate segment and the double bottom segment, the second node is aligned with the installation position line of the diagonal side plate segment, the deviation is controlled within 3mm, the end surface coincidence between the diagonal side plate segment and the side bulkhead segment is controlled within 5mm, and the horizontal distance error between the second node and the first node is controlled within 5mm.

5. The method of claim 1, wherein, The method further comprises drawing a 100MK inspection line at the tail of the diagonal side plate segment according to the position measurement point, taking the position measurement point as a reference, determining a plurality of points by offsetting the position measurement point by 100+X, and connecting the points to form the 100MK inspection line.

6. A method of controlling the accuracy of a double fuel container ship side section according to claim 5, characterized in that, When the bulkhead segment is installed, the distance between the bulkhead segment and the 100MK inspection line is controlled within 100±5mm.

7. A dual-fuel container ship side section, characterized in that The double bottom segment, the platform plate small group, the side bulkhead segment, the diagonal side plate segment and the bulkhead segment are assembled on the double bottom segment to form the double fuel container ship side section according to the precision control method of the double fuel container ship side section of any one of claims 1-6. The double bottom segment, the platform plate small group, the side bulkhead segment, the diagonal side plate segment and the bulkhead segment are assembled on the double bottom segment to form the double fuel container ship side section according to the precision control method of the double fuel container ship side section of any one of claims 1-6.

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