Groove body subsection construction method and groove body subsection

Abstract

The invention relates to a groove body segment construction method and a groove body segment, the groove body segment is divided into a plurality of segments, and same assemblies of different groove body segments are subjected to jointed board manufacturing on the same jig frame; the V-shaped groove small assemblage and the upper deck are manufactured on the same jig frame in an inverted-state splicing mode, the U-shaped groove longitudinal wall plate is installed above the upper deck in the inverted state, and the groove body segment middle assemblage is formed when the supporting longitudinal wall is installed above the V-shaped small assemblage in the inverted state. A triangular cabin small assemblage is normally carried on the V-shaped groove assemblage; the whole body is hoisted and carried above the lower deck to form a groove body subsection; and the groove body sections are spliced section by section in the length direction to form complete groove body sections. The same assemblies on different groove body sections are subjected to jointed board manufacturing on the same jig frame, the relative consistency of the precision of the assemblies of the different groove body sections is guaranteed, the construction error between the different groove body sections is reduced, and therefore the folding and splicing error of the different groove body sections is reduced.

Description

Technical Field

[0001] The invention relates to the field of shipbuilding, and in particular to a tank body segment construction method and a tank body segment. Background Art

[0002] In the hull structure, some sections of the hull structure have groove structures inside, such as U-shaped grooves and V-shaped grooves. Such groove sections have high requirements for overall accuracy and docking accuracy of the front and rear groove sections during construction, and it is difficult to control the accuracy during production. If the number of sections is reduced so that the specifications of a single section are relatively large, although the accuracy problem during docking can be reduced, it will increase the difficulty of steel size, processing equipment requirements, and closing and lifting requirements. For ship companies, the cost of replacing processing equipment and lifting equipment is too high and does not meet the requirements of actual production. If the number of sections is increased to reduce the specifications of steel, accuracy problems are likely to occur when the sections are docked. Summary of the invention

[0003] In order to solve the problems existing in the existing tank segment construction, the present invention provides a tank segment construction method and a tank segment. Through the method of the present invention, the docking accuracy is easy to control while the number of segments meets the production requirements of the shipbuilding company.

[0004] The technical objectives of the present invention are achieved through the following technical solutions:

[0005] A method for constructing a tank body in sections, the method comprising:

[0006] Step 1, the tank body is divided into several sections, each of which includes a V-shaped tank group, an upper deck, a triangular cabin group, a U-shaped tank longitudinal wall, a supporting longitudinal wall and a lower deck, and the same components of the tank body sections of different sections are assembled on the same tire frame;

[0007] Step 2: The V-shaped groove sub-unit and the upper deck are produced by reverse splicing on the same frame; the triangular cabin sub-unit, the U-shaped groove longitudinal wall, the supporting longitudinal wall and the lower deck are produced by splicing on the frame respectively;

[0008] Step 3, installing the U-shaped trough longitudinal wall plate above the upper deck in the inverted state and above the V-shaped subassembly supporting the longitudinal wall installed in the inverted state to form a trough body segmented middle assembly;

[0009] Step 4: Assemble the upper normal loading triangular cabin group in the V-shaped groove; hoist and load the whole part above the lower deck to form a groove segment;

[0010] Step 5: Splice the tank body segments one by one along the length direction to form a complete tank body segment.

[0011] Further, in step 2, the V-groove group and the upper deck are assembled and manufactured on a linear tire plate type tire frame, including the following steps:

[0012] S21, manufacturing a linear tire plate type tire frame, the linear tire plate type tire frame comprising a tire frame column and a linear tire plate, the tire frame column being supported below the linear tire plate; drawing a center line of the linear tire plate type tire frame on the ground;

[0013] S22, the V-shaped groove group comprises a groove bottom plate, groove inclined plates arranged on both sides of the groove bottom plate, and an obtuse angle is formed between the groove inclined plates and the groove bottom plate;

[0014] The trough bottom plate is positioned on the linear tire plate with the center line of the tire frame as the reference, the center line of the trough bottom plate is aligned with the center line of the tire frame, and the trough bottom plate and the tire frame are fixed by spot welding;

[0015] S23, laying the trough inclined plate along the trough bottom plate to the linear tire plates on both sides, the trough inclined plate is positioned based on the trough bottom plate, and the trough inclined plate is fixed to the tire frame bracket by spot welding;

[0016] S24, the upper deck is assembled on the linear tire plate along the inclined plate of the tank body, and the upper deck is fixed to the tire frame by spot welding;

[0017] S25. After the panels are assembled, the joints are welded.

[0018] Furthermore, in step 2, the tire frame where the V-groove group is located selects the first, middle and last three levels of linear tire plates to set transverse reinforcements. After the construction of the segmented mid-assembly is completed, the linear tire plates, transverse reinforcements and the segmented mid-assembly are cut off together for hoisting and turning over.

[0019] Further, in step 2, the triangular cabin subassembly includes a triangular cabin deck panel, a triangular cabin longitudinal wall panel, and a triangular elbow plate, and the tire frame made by the triangular cabin subassembly includes a column-type tire frame and a slot-type tire plate, and the slot-type tire plate is upwardly provided with a slot matching the thickness of the triangular cabin deck panel; the slot-type tire plate is arranged on one side of the column-type tire frame and the bottom height of the slot is lower than the upper end support surface of the column-type tire frame.

[0020] When the triangular cabin group is assembled on the tire frame, the triangular cabin longitudinal wall plate is horizontally placed on the upper end support surface of the column tire frame, and the triangular cabin longitudinal wall plate is spot welded to the column tire frame. The triangular cabin deck panel is divided into the first deck panel and the second deck panel, and then the second deck panel is longitudinally inserted into the slot of the slot-type tire plate, and the end of the second deck panel is adjusted to be flush with the end of the triangular cabin longitudinal wall plate, so that the side of the triangular cabin longitudinal wall plate close to the slot-type tire plate is vertically attached to the second deck panel, and the triangular cabin longitudinal wall plate is spot welded to the second deck panel; the first deck panel is not installed temporarily, and the first deck panel is installed after the triangular cabin group is assembled in the V-groove; then the installation line of the triangular bracket is marked on the triangular cabin longitudinal wall plate, and the triangular bracket is installed piece by piece.

[0021] Furthermore, when assembling the upper normal loading triangular cabin group into the V-shaped groove, the triangular cabin longitudinal wall plate and the triangular bracket are respectively welded and fixed to the groove body inclined plate, and then the first deck panel is installed, and the two sides of the first deck panel are respectively welded and fixed to the upper deck and the second deck panel.

[0022] Furthermore, after the production and welding of the V-groove group stand, upper deck, triangular cabin group stand, U-groove longitudinal wall, supporting longitudinal wall and lower deck panel are completed, the frame marking and frame installation are carried out respectively, and a welding shrinkage value of 0.3-0.8mm is pre-added when marking the frame; the weld at the intersection of the frame and the panel weld is first polished and smoothed, and the frame is positioned along the frame marking, and spot welded after positioning is completed; when fully welded, the frames are welded by intermittent welding.

[0023] Furthermore, the triangular cabin group is welded completely by double-sided welding. After one side is welded, it is turned over for carbon planing and then welded on the other side. After the double-sided welding is completed, 100% UT flaw detection is performed. After the flaw detection is qualified, the straightness of the triangular cabin group is measured. If the straightness is qualified, the channel steel is installed on the triangular bracket to strengthen it.

[0024] The present invention also provides a trough body segment, including a V-shaped groove group stand, an upper deck, a triangular cabin group stand, a U-shaped groove longitudinal wall, a supporting longitudinal wall and a lower deck, the upper deck is arranged above the lower deck, the U-shaped groove longitudinal wall is vertically supported between the upper deck and the lower deck, the V-shaped groove group stand is arranged above the upper deck and between the U-shaped groove longitudinal walls on both sides, and the supporting longitudinal wall is supported between the lower end of the middle part of the V-shaped groove group stand and the upper end of the lower deck; the triangular cabin group stand is arranged inside the V-shaped groove group stand and close to the edges on both sides of the upper end of the V-shaped groove group stand.

[0025] Furthermore, the triangular cabin group includes a triangular cabin deck panel, a triangular cabin longitudinal wall panel, and a triangular bracket. One side of the triangular cabin deck panel is connected to the upper deck, and the triangular cabin longitudinal wall panel is vertically fixed to the lower end surface close to the other side of the triangular cabin deck panel. The triangular bracket is perpendicular to the triangular cabin deck panel and the triangular cabin longitudinal wall panel and is located between the triangular cabin deck panel and the triangular cabin longitudinal wall panel.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention divides the trough body segments into several sections along the length direction, and the same components on different sections of the trough body segments are assembled on the same tire frame, thereby ensuring the relative consistency of the accuracy of the components of different sections of the trough body segments, reducing the construction error between different sections of the trough body segments, and thus reducing the error of closing and splicing different sections of the trough body segments.

[0028] 2. When the triangular cabin group stand in the present invention is manufactured, the triangular cabin group stand is constructed separately to ensure the accuracy of its straightness and flatness. Through the cooperation of the column type tire frame and the slot type tire plate, its assembly accuracy is improved, providing a good accuracy foundation for subsequent closure.

[0029] 3. After the construction of the segmented mid-assembly in the present invention is completed, the linear tire plate and the transverse reinforcement are cut off together with the segmented mid-assembly for hoisting and turning over. The linear tire plate and the transverse reinforcement provide structural reinforcement for the turning over hoisting of the segmented mid-assembly, avoiding deformation during the hoisting process and ensuring the subsequent loading accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a segmented cross-section of the tank body in the present invention.

[0031] Figure 2 It is a schematic diagram of laying boards on a linear tire plate type tire frame in the present invention.

[0032] Figure 3 It is a schematic diagram of the installation of the U-shaped groove longitudinal wall and the supporting longitudinal wall in the present invention.

[0033] Figure 4 It is a schematic diagram of manufacturing the standing panels of the triangular cabin group in the present invention.

[0034] Figure 5 It is a schematic diagram of the tank body being divided into sections along the length direction in the present invention.

[0035] Figure 6 It is a schematic diagram of the installation of the first deck surface in the present invention.

[0036] In the figure:

[0037] 1. Upper deck; 2. U-shaped trough longitudinal wall; 3. Support longitudinal wall; 4. Lower deck; 5. Trough bottom plate; 6. Trough inclined plate; 7. Triangular cabin deck panel; 8. Triangular cabin longitudinal wall plate; 9. Triangular bracket; 10. Center line of trough bottom plate; 11. Tire frame column; 12. Linear tire plate; 13. Tire frame center line; 14. Transverse reinforcement; 15. Pillar type tire frame; 16. Card groove type tire plate; 17. Tire frame column; 18. First deck panel; 19. Second deck panel; 20. Steel liner. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0039] A method for constructing a tank body in sections, the method comprising:

[0040] Step 1: Divide the tank into several sections, such as Figure 5 As shown, the length of each section is 10-15 meters, and each section of the trough body includes a V-shaped trough group, an upper deck 1, a triangular cabin group, a U-shaped trough longitudinal wall 2, a supporting longitudinal wall 3 and a lower deck 4. Figure 1 As shown, the same components of different sections of the trough body segments are assembled on the same tire frame. For example, if the trough body segment is divided into 4 sections, the same components of several of the sections can be assembled on the same tire frame. If the site permits, the same components of all sections can also be assembled on the same tire frame, such as the triangular cabin groups of 2 sections can be assembled on the same linear tire plate type tire frame.

[0041] More specifically, the V-shaped groove group can be further divided into a groove bottom plate 5 and a groove inclined plate 6, and the triangular cabin group can be further divided into a triangular cabin deck panel 7, a triangular cabin longitudinal wall plate 8, and a triangular bracket 9. It should be noted that the V-shaped groove in the V-shaped groove group in this embodiment refers to the V-shaped angle formed between the groove bottom plate 5 and the groove inclined plate 6 on one side, the V-shaped angle is an obtuse angle, and the groove of the entire V-shaped groove group is an inverted trapezoidal structure; the U-shape of the U-shaped groove longitudinal wall in this embodiment refers to the U-shaped structure formed between the U-shaped groove longitudinal walls 2 on both sides and the lower deck 4.

[0042] Step 2: The V-groove group stand and the upper deck are made by inverse panelization on the same linear tire plate frame; the triangular cabin group stand is made by panelization on a customized tire frame, and the U-groove longitudinal wall, supporting longitudinal wall and lower deck are made by panelization on a column-type tire frame; corresponding to the flat-plate structure, the horizontality of the tire frame should be controlled within ±1mm.

[0043] Preferably, after the V-groove panel, upper deck, triangular cabin panel, U-groove longitudinal wall, supporting longitudinal wall and lower deck panel are manufactured and welded, the frame is marked and installed respectively. When marking the frame, a welding shrinkage value of 0.3-0.8mm is pre-added. For example, if the theoretical spacing between ribs is 600mm, the frame can be marked according to 600.6mm. The theoretical spacing between longitudinal bones is 500mm, and the frame can be marked according to 500.5mm.

[0044] The welds at the intersection of the frame and the plate should be polished smooth to reduce the assembly gap, and the frame should be positioned along the frame markings. After positioning, it should be fixed by spot welding. When fully welded, it can be welded by an automatic fillet welding machine to improve welding efficiency. Each level is welded in a divided manner, and the frames are welded by intermittent welding. That is, after one level of welding is completed, the next level of frame is welded by skipping the next level of frame to reduce welding deformation.

[0045] Since the U-shaped groove longitudinal wall, supporting longitudinal wall and lower deck are planar structures, this type of structure can be welded on a column-type frame. After welding, the frame is marked and then installed according to the frame marking. The structure includes ribs and longitudinals, and the ribs and longitudinals are perpendicular to each other.

[0046] Since the V-groove group has an inverted trapezoidal groove structure, the V-groove group is welded and manufactured on a linear tire frame. Since the upper deck is adjacent to the groove side plate of the V-groove group, the upper deck is welded and manufactured on the same linear tire frame as the V-groove group.

[0047] Due to the special structure of the triangular cabin group, the flatness and straightness need to be strictly controlled. Therefore, the triangular cabin group is manufactured by panel welding on a customized tire frame.

[0048] More specifically, the following steps are included when welding the V-groove panels and the upper deck:

[0049] S21, Linear tire plate type tire frame production, such as Figure 2 As shown, the linear tire plate type tire frame includes a tire frame column 11 and a linear tire plate 12. The tire frame column 11 is supported below the linear tire plate 12. A center line 13 of the linear tire plate type tire frame is drawn on the ground.

[0050] S22, positioning the tank bottom plate 5 on the linear tire plate with the tire frame center line 13 as a reference, marking the tank bottom plate 5 with the tank bottom plate center line 10, aligning the tank bottom plate center line 10 with the tire frame center line 13, and spot welding the tank bottom plate 5 to the tire frame;

[0051] S23, laying the trough inclined plate 6 on the linear tire plate 12 on both sides along the trough bottom plate 5, the trough inclined plate 6 is positioned based on the trough bottom plate 5, and the trough inclined plate 6 is spot welded and fixed to the tire frame;

[0052] S24, the upper deck 1 is assembled on the linear tire plate 12 along the tank inclined plate 6, and the upper deck 1 is fixed to the tire frame by spot welding;

[0053] S25, after the panel assembly is completed, the joint seams are welded, and after the welding is completed, the frame is marked on the upper deck 1, the tank inclined plate 6 and the tank bottom plate 5, and the frame is positioned, welded and installed according to the frame markings.

[0054] Preferably, the tire frame where the V-groove group is located selects the first, middle and tail three-level linear tire plates to set transverse reinforcements 14, and the transverse reinforcements 14 are set parallel to the linear tire plates 12. After the construction of the segmented mid-assembly is completed, the linear tire plates, transverse reinforcements and the segmented mid-assembly are cut off together for hoisting and turning over. The transverse reinforcements 14 are such as channel steels to avoid deformation of the groove body part of the V-groove group during the hoisting process.

[0055] The tire frame made by the triangular cabin group includes a column-type tire frame 15 and a slot-type tire plate 16. The slot-type tire plate 16 is provided with a slot matching the thickness of the triangular cabin deck panel 7 upwardly; the slot-type tire plate 16 is arranged on one side of the column-type tire frame 15 and the bottom height of the slot is lower than the upper end support surface of the column-type tire frame 15, so that the side edge of the triangular cabin deck panel 7 extends out a section relative to the triangular cabin longitudinal wall plate 8, such as Figure 4 shown.

[0056] When the triangular cabin group is assembled on the tire frame, the triangular cabin longitudinal wall plate 8 is horizontally placed on the upper end support surface of the column type tire frame 15, and the triangular cabin longitudinal wall plate 8 is fixed to the column type tire frame 15 by spot welding. The triangular cabin deck surface 7 is divided into a first deck panel 18 and a second deck panel 19, and then the second deck panel 19 is longitudinally inserted into the slot of the slot type tire plate 16, and the end of the second deck panel 19 is adjusted to be flush with the end of the triangular cabin longitudinal wall plate 8, so that the side of the triangular cabin longitudinal wall plate 8 close to the slot type tire plate 16 is vertically attached to the second deck panel 19, and the triangular cabin longitudinal wall plate 8 and the second deck panel 19 are fixed by spot welding; the first deck panel 18 is not installed temporarily, and the first deck panel 18 is installed after the triangular cabin group is assembled in the V-groove;

[0057] Then, mark the installation line of the triangular bracket on the triangular cabin longitudinal wall plate 8, install the triangular bracket 9 piece by piece along the length extension direction of the triangular cabin longitudinal wall plate 8, connect the triangular bracket 9 with the triangular cabin longitudinal wall plate 8 and the second deck panel 19 piece by piece by spot welding, so that the triangular bracket 9 is perpendicular to the triangular cabin longitudinal wall plate 8 and the second deck panel 19 respectively, and after rechecking the installation accuracy of the triangular bracket, completely weld the triangular bracket 9, the second deck panel 19 and the triangular cabin longitudinal wall plate 8.

[0058] The triangular cabin group stand is double-sided welded when fully welded. After one side is welded, it is turned over for carbon planing and then welded on the other side. After double-sided welding, 100% UT flaw detection is carried out. After the flaw detection is qualified, the straightness of the triangular cabin group stand is measured. If the straightness is qualified, channel steel is installed on the triangular bracket to strengthen it.

[0059] Step 3: Figure 3 As shown, the U-shaped trough longitudinal wall plate 2 is installed above the upper deck 1 in the inverted state, and the supporting longitudinal wall 3 is installed above the V-shaped subassembly in the inverted state to form a trough body segmented middle assembly;

[0060] Specifically, the supporting longitudinal wall 3 is positioned with the center line 10 of the trough bottom plate, and is vertically positioned on the trough bottom plate 5. After being spot-welded and fixed, the verticality of the supporting longitudinal wall 3 relative to the trough bottom plate 5 is checked. After passing the inspection, the supporting longitudinal wall 3 and the trough bottom plate 5 are completely welded.

[0061] When installing the U-shaped longitudinal wall plate 2, draw a positioning line for the installation of the U-shaped longitudinal wall plate 2 on the upper deck 1, vertically position the U-shaped longitudinal wall plate 2 on the upper deck 1 along the positioning line, and fix it by spot welding. Then, perform a verticality inspection of the U-shaped longitudinal wall plate 2. After passing the inspection, complete welding is performed.

[0062] In order to prevent the U-shaped longitudinal wall plate 2 and the supporting longitudinal wall 3 from being deformed during the subsequent lifting and turning process, channel steel may be added to reinforce the opening between the U-shaped longitudinal wall plate 2 and the supporting longitudinal wall 3 .

[0063] Step 4: Turn the assembly in the V-shaped groove over 180 degrees and place it in a normal position. When assembling the upper normal loading triangle cabin group in the V-shaped groove, weld and fix the triangle cabin longitudinal wall plate 8 and the triangle bracket plate 9 to the groove body inclined plate 6 respectively, and then install the first deck panel 18. The two sides of the first deck panel 18 are welded and fixed to the upper deck 1 and the second deck panel 19 respectively to ensure that the upper deck 1, the first deck panel 18 and the second deck panel 19 are in the same horizontal height.

[0064] More specifically, in order to facilitate the subsequent welding of the first deck panel 18, during the panel assembly stage, a steel liner 20 is welded at the position where the triangular bracket 9 is installed to install the first deck panel 18, such as Figure 6As shown, the width of the steel gasket is greater than the thickness of the triangular bracket 9, so that the steel gasket 20 extends out on both sides of the thickness of the triangular bracket 9. When installing the first deck panel 18, it is laid piece by piece along the vertical length direction of the triangular cabin group. The edge of the previous first deck panel 18 is placed near the center of the steel gasket, and the first deck panel 18 is welded to the steel gasket 20. Similarly, the edge of the next first deck panel 18 is welded to the same steel gasket 20. Finally, the gap between the two first deck panels 18 is welded and filled.

[0065] The whole is hoisted and carried on the upper part of the lower deck 4 to form a trough segment;

[0066] Step 5: Splice the tank body segments one by one along the length direction to form a complete tank body segment.

[0067] This embodiment also provides a tank segmentation, such as Figure 1 and Figure 5 As shown, it can be one section or several sections, or a complete length of the trough segment, which can be constructed according to the above method, including a V-shaped groove group, an upper deck 1, a triangular cabin group, a U-shaped groove longitudinal wall 2, a supporting longitudinal wall 3 and a lower deck 4, the upper deck 1 is arranged above the lower deck 4, the U-shaped groove longitudinal wall 2 is vertically supported between the upper deck 1 and the lower deck 4, the V-shaped groove group is arranged above the upper deck 4 and between the U-shaped groove longitudinal walls 2 on both sides, and the supporting longitudinal wall 3 is supported between the lower end of the middle part of the V-shaped groove group and the upper end of the lower deck 4; the triangular cabin group is arranged inside the V-shaped groove group and close to the edges on both sides of the upper end of the V-shaped groove group. More specifically, the triangular cabin group includes a triangular cabin deck panel 7, a triangular cabin longitudinal wall panel 8, and a triangular bracket 9. One side of the triangular cabin deck panel 7 is connected to the upper deck 1. The triangular cabin longitudinal wall panel 8 is vertically fixed to the lower end surface near the other side of the triangular cabin deck panel 7. The edge of the triangular cabin longitudinal wall panel 8 extends a distance relative to the triangular cabin longitudinal wall panel 8. The triangular bracket 9 is perpendicular to the triangular cabin deck panel 7 and the triangular cabin longitudinal wall panel 8 and is located between the triangular cabin deck panel 7 and the triangular cabin longitudinal wall panel 8.

[0068] This embodiment is only a further explanation of the present invention, not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. A method for constructing a tank in sections, characterized in that: The method includes: Step 1, the tank body is divided into several sections, each of which includes a V-shaped tank group, an upper deck, a triangular cabin group, a U-shaped tank longitudinal wall, a supporting longitudinal wall and a lower deck, and the same components of the tank body sections of different sections are assembled on the same tire frame; Step 2: The V-shaped groove sub-unit and the upper deck are produced by reverse splicing on the same frame; the triangular cabin sub-unit, the U-shaped groove longitudinal wall, the supporting longitudinal wall and the lower deck are produced by splicing on the frame respectively; Step 3, installing the U-shaped trough longitudinal wall plate above the upper deck in the inverted state and above the V-shaped subassembly supporting the longitudinal wall installed in the inverted state to form a trough body segmented middle assembly; Step 4: Assemble the upper normal loading triangular cabin group in the V-shaped groove; hoist and load the whole part above the lower deck to form a groove segment; Step 5: Splice the tank body segments one by one along the length direction to form a complete tank body segment.

2. A method for constructing a tank in sections according to claim 1, characterized in that: In step 2, the V-groove group and the upper deck are assembled and manufactured on a linear tire plate type tire frame, including the following steps: S21, manufacturing a linear tire plate type tire frame, the linear tire plate type tire frame comprising a tire frame column and a linear tire plate, the tire frame column being supported below the linear tire plate; drawing a center line of the linear tire plate type tire frame on the ground; S22, the V-shaped groove group comprises a groove bottom plate, groove inclined plates arranged on both sides of the groove bottom plate, and an obtuse angle is formed between the groove inclined plates and the groove bottom plate; The trough bottom plate is positioned on the linear tire plate with the center line of the tire frame as the reference, the center line of the trough bottom plate is aligned with the center line of the tire frame, and the trough bottom plate and the tire frame are fixed by spot welding; S23, laying the trough inclined plate along the trough bottom plate to the linear tire plates on both sides, the trough inclined plate is positioned based on the trough bottom plate, and the trough inclined plate is fixed to the tire frame bracket by spot welding; S24, the upper deck is assembled on the linear tire plate along the inclined plate of the tank body, and the upper deck is fixed to the tire frame by spot welding; S25. After the panels are assembled, the joints are welded.

3. A method for constructing a tank in sections according to claim 2, characterized in that: In step 2, the tire frame where the V-groove group is located selects the first, middle and last three levels of linear tire plates to set transverse reinforcements. After the construction of the segmented mid-assembly is completed, the linear tire plates, transverse reinforcements and the segmented mid-assembly are cut off together for hoisting and turning over.

4. A method for constructing a tank in sections according to claim 3, characterized in that: In step 2, the triangular cabin subassembly includes a triangular cabin deck panel, a triangular cabin longitudinal wall panel, and a triangular elbow plate. The tire frame made by the triangular cabin subassembly includes a column-type tire frame and a slot-type tire plate. The slot-type tire plate is upwardly provided with a slot matching the thickness of the triangular cabin deck panel; the slot-type tire plate is arranged on one side of the column-type tire frame and the bottom height of the slot is lower than the upper end support surface of the column-type tire frame.

5. A method for constructing a tank in sections according to claim 4, characterized in that: When the triangular cabin group is assembled on the tire frame, the triangular cabin longitudinal wall plate is horizontally placed on the upper end support surface of the column type tire frame, the triangular cabin longitudinal wall plate is spot welded and fixed to the column type tire frame, the triangular cabin deck panel is divided into the first deck panel and the second deck panel, and then the second deck panel is longitudinally inserted into the slot of the slot type tire plate, and the end of the second deck panel is adjusted to be flush with the end of the triangular cabin longitudinal wall plate, so that the side of the triangular cabin longitudinal wall plate close to the slot type tire plate is vertically attached to the second deck panel, and the triangular cabin longitudinal wall plate and the second deck panel are spot welded and fixed; the first deck panel is not installed temporarily, and the first deck panel is installed after the triangular cabin group is mounted in the V-groove for assembly; then the installation line of the triangular bracket is marked on the triangular cabin longitudinal wall plate, and the triangular bracket is installed piece by piece.

6. A method for constructing a tank in sections according to claim 5, characterized in that: When assembling the upper normal loading triangular cabin group in the V-shaped groove, the triangular cabin longitudinal wall plate and the triangular bracket are welded and fixed to the groove body inclined plate respectively, and then the first deck panel is installed, and the two sides of the first deck panel are welded and fixed to the upper deck and the second deck panel respectively.

7. A method for constructing a tank in sections according to claim 1, characterized in that: After the production and welding of the V-groove group stand, upper deck, triangular cabin group stand, U-groove longitudinal wall, supporting longitudinal wall and lower deck panel are completed, the frame is marked and installed respectively. When marking the frame, a welding shrinkage value of 0.3-0.8mm is pre-added; the welds at the intersection of the frame and the panel weld are first polished and smoothed, and the frame is positioned along the frame markings. After positioning is completed, it is fixed by spot welding; when fully welded, the frames are welded by intermittent welding.

8. A method for constructing a tank in sections according to claim 5, characterized in that: The triangular cabin group is welded completely by double-sided welding. After one side is welded, it is turned over for carbon planing and then welded on the other side. After the double-sided welding is completed, 100% UT flaw detection is performed. After the flaw detection is qualified, the straightness of the triangular cabin group is measured. If the straightness is qualified, channel steel is installed on the triangular bracket to strengthen it.

9. A tank segment, characterized in that: It includes a V-groove group stand, an upper deck, a triangular cabin group stand, a U-groove longitudinal wall, a supporting longitudinal wall and a lower deck. The upper deck is arranged above the lower deck, the U-groove longitudinal wall is vertically supported between the upper deck and the lower deck, the V-groove group stand is arranged above the upper deck and between the U-groove longitudinal walls on both sides, and the supporting longitudinal wall is supported between the lower end of the middle part of the V-groove group stand and the upper end of the lower deck; the triangular cabin group stand is arranged inside the V-groove group stand and close to the edges on both sides of the upper end of the V-groove group stand.

10. A tank segment according to claim 9, characterized in that: The triangular cabin group comprises a triangular cabin deck panel, a triangular cabin longitudinal wall panel, and a triangular bracket. One side of the triangular cabin deck panel is connected to the upper deck, and the triangular cabin longitudinal wall panel is vertically fixed to the lower end surface close to the other side of the triangular cabin deck panel. The triangular bracket is perpendicular to the triangular cabin deck panel and the triangular cabin longitudinal wall panel and is located between the triangular cabin deck panel and the triangular cabin longitudinal wall panel.

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