Method for assembling groove-shaped enclosure bulkhead for ship body modification

Abstract

The invention relates to the technical field of ship body building methods, in particular to a ship body refitting groove type enclosure bulkhead assembling method. An assembling method of a groove-shaped enclosure bulkhead for hull refitting comprises the steps that firstly, all parts of the groove-shaped enclosure bulkhead are transported to a position to be installed, then an enclosure on one side and a horizontal transition plate corresponding to the enclosure are connected to a deck in a welded mode, and then a plurality of groove-shaped plates are welded to the horizontal transition plate; and finally, the surrounding wall on the other side and the horizontal transition plate corresponding to the surrounding wall are connected to the deck and the groove-shaped plate in a welded mode. Due to split type installation, transportation is convenient, collision with the side wall of the cabin can be avoided in the transportation process, one-time installation forming is achieved, strength during transportation and transfer does not need to be considered, and the support does not need to be additionally welded and disassembled. Therefore, the problems that in the prior art, the groove-shaped enclosure bulkhead is assembled and formed outside the cabin firstly, then the assembled groove-shaped enclosure bulkhead is hoisted into the cabin, consequently, the groove-shaped enclosure bulkhead is prone to colliding and interfering with the cabin wall, and operation is tedious are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ship hull construction methods, and in particular to a ship hull modification groove-shaped enclosure wall assembly method. Background Art

[0002] In existing ship modification or repair projects, there is a process for installing enclosures in the cabin. Generally, enclosures are of two types: flat plate and grooved type. Groove-type enclosures require the use of grooved plates, such as Figure 1 As shown, the grooved plate has a flat plate surface and an undulating grooved surface on the other side. When used as a surrounding wall, its groove extends vertically. Since the grooved surrounding wall has a higher structural strength, it has a large number of applications. Usually, Figure 2 As shown, the trough-shaped enclosure wall includes a trough-shaped plate 3 as a main body, an upper enclosure 1 located at the upper end of the trough-shaped plate 3, and a lower enclosure 5 located at the lower end of the trough-shaped plate 3. An upper horizontal transition plate 2 is also arranged between the upper enclosure 1 and the trough-shaped plate 3, and a lower horizontal transition plate 4 is also arranged between the lower enclosure 5 and the trough-shaped plate 3. The two horizontal transition plates are blocked on the end face of the trough-shaped plate 3, and the width of the horizontal transition plate is not less than the thickness of the trough-shaped plate 3, so that the grooves at the ends of the trough-shaped plates are all blocked when assembled into the trough-shaped enclosure wall. Since the enclosure wall is generally large in area, the trough-shaped plates are often divided into blocks, and multiple blocks are arranged left and right. When in use, firstly, the upper enclosure, the upper horizontal transition plate, multiple trough-shaped plates, the lower horizontal transition plate and the lower enclosure are welded into a whole on the outside, and then the whole is hoisted in the cabin where it needs to be used for installation.

[0003] Since the above technical solution is a modification of the ship, there may be a certain deformation between the deck and the bulkhead during the use of the ship, which will cause the size to change from the designed size. In addition, during the welding and assembly of the grooved wall, due to the thermal expansion and contraction of the welding position, the processing technology and the measurement size error, it is impossible to match the grooved wall with the reserved space in the cabin. The existing solution is to set a margin at the edge of the grooved wall, cut it when it is hoisted in the cabin, and finally install the cut grooved wall in the cabin.

[0004] In the above technical solution, since the size of the wall is enlarged, when the groove wall is transported into the cabin, the groove wall will collide with the bulkhead of the ship, resulting in damage to the groove wall or the bulkhead. The groove wall has a small wall thickness and a large area. In order to avoid deformation of the groove wall during transportation, temporary reinforcement is generally installed on the groove wall during transportation, which needs to be removed after installation. Not only is the process cumbersome, but the surface of the plate may be damaged during the removal process. Summary of the invention

[0005] In view of this, the present invention provides a method for assembling a grooved enclosure wall for a hull modification, so as to solve the problem in the prior art that the grooved enclosure wall is first assembled and formed outside the cabin and then the assembled grooved enclosure wall is hoisted into the cabin, which causes easy collision and interference with the bulkhead and complicated operation.

[0006] A method for assembling a grooved enclosure for ship hull modification comprises the following steps: firstly, transporting the various components of the grooved enclosure to a position to be installed, then welding the enclosure on one side and a horizontal transition plate corresponding to the enclosure to a deck, then respectively welding a plurality of grooved plates to the horizontal transition plate, and cutting off the horizontal margin of the last grooved plate when welding the last grooved plate; finally, welding the enclosure on the other side and a horizontal transition plate corresponding to the enclosure to the deck and the grooved plate, and cutting off the margin of the enclosure on the upper and lower directions before welding.

[0007] Furthermore, the enclosure installed first on one side is the upper enclosure, and the enclosure installed last is the lower enclosure, and margins are set in the upper and lower directions of the lower enclosure.

[0008] Furthermore, before cutting off the lower sill, the gap between the grooved plate and the deck is measured and the portion to be cut is marked on the lower sill.

[0009] Furthermore, the horizontal edges of the enclosure and the vertical edges of the channel plate are welded in the order from the middle to both ends.

[0010] Furthermore, spot welding is adopted during welding, and after completing a spot welding, a tool is used to hammer the welding point at that spot to reduce the shrinkage at the welding point.

[0011] Further, the solder joint is hammered until the solder joint temperature drops below a preset temperature.

[0012] Furthermore, a wooden hammer or a rubber hammer is used for hammering.

[0013] Furthermore, when cutting the horizontal margin of the grooved plate, the grooved plate is divided into at least three sections in the up and down direction, and the sections are cut in sequence. After cutting one section and before cutting another section, the cut section is first welded.

[0014] Furthermore, when installing the enclosure, the horizontal dimension of the enclosure and the dimension of the reserved space are measured. If the dimension of the enclosure is larger than the dimension of the reserved space, the margin of the enclosure in the horizontal direction is cut off.

[0015] The beneficial effects of the assembling method of the grooved enclosure wall for ship hull modification in the present invention are as follows: in the assembling method of the grooved enclosure wall for ship hull modification in the present invention, the various components of the grooved enclosure wall are transported to the positions to be installed and installed separately, thereby changing the previous mode of transporting the components to the interior of the cabin after the external assembly is completed; since the grooved enclosure wall has margins in the horizontal and vertical directions, the margin in the horizontal direction is set on one of the grooved plates, and the margin in the vertical direction is set on one of the enclosures; the enclosure without margin is installed first, which is convenient for installation; the margin is set on the last grooved plate, which is convenient for accurate margin value, It is convenient for accurate cutting; in addition, the final installation of the enclosure with a surplus also facilitates the accurate measurement of the surplus in the upper and lower directions, thereby improving the installation accuracy; since it is installed in the cabin and is installed in a split manner, it is convenient for transportation, and collision with the cabin side wall can be avoided during transportation, and it is installed and formed at one time, and there is no need to consider the strength during transportation and transfer, and there is no need to weld and disassemble the bracket additionally, which simplifies the operation steps, thereby solving the problem in the prior art of first assembling and forming the grooved enclosure outside the cabin and then hoisting the assembled grooved enclosure into the cabin, which causes easy collision and interference with the cabin wall and cumbersome operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of a groove-shaped plate in a groove-shaped enclosure wall in the prior art;

[0018] Figure 2 It is a structural schematic diagram of a groove-shaped enclosure wall in the prior art;

[0019] Figure 3 The figure is a structural schematic diagram of the assembly sequence and welding direction in the method for assembling a grooved enclosure wall for ship hull modification according to the present invention (for ease of presentation, arrows are used to represent the welding direction).

[0020] The meanings of the numbers in the figure are: 1. Upper enclosure; 2. Upper horizontal transition plate; 3. Grooved plate; 4. Lower horizontal transition plate; 5. Lower enclosure. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0022] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0023] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms and should not be understood as indicating or implying relative importance. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0024] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0027] In order to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0028] In an embodiment of the method for assembling a grooved wall of a ship hull modification of the present invention:

[0029] The groove-shaped wall of the present invention is composed of multiple parts, which can be specifically referred to Figure 2 , including an upper enclosure 1, an upper horizontal transition plate 2 arranged vertically with the upper enclosure 1, a lower enclosure 5, a lower horizontal transition plate 4 arranged vertically with the lower enclosure 5, and a groove plate 3 located between the two horizontal transition plates. Generally, the groove plate 3 is a prefabricated plate with specific specifications purchased from outside, and its size is relatively fixed and its weight is heavy. Therefore, in this embodiment, there are two groove plates 3, and the two groove plates 3 are arranged on the left and right. Of course, in other embodiments, the number of groove plates is arranged according to the actual size. If the required groove wall size is larger, three or four groove plates can be arranged. If the required groove wall size is smaller, one groove plate can also be arranged. At this time, since there is only one groove plate, the remaining amount is set on this groove plate.

[0030] In order to avoid collision with the bulkhead during integral hoisting, in this embodiment, multiple parts constituting the trough-shaped enclosure are transported to the position to be assembled, and are directly assembled at the position to be assembled. During the assembly process, the upper enclosure 1, the upper horizontal transition plate 2, the two trough-shaped plates 3, the lower horizontal transition plate and the lower enclosure 5 are welded and assembled in sequence, and each step is described in detail below.

[0031] like Figure 2 and Figure 3 As shown, during assembly, the upper enclosure 1 is installed first. The upper enclosure 1 is a vertically arranged steel plate. After installation, it contacts the bottom of the upper deck and the bulkheads on both sides. During welding, the upper part of the upper enclosure 1 is first welded to the lower surface of the upper deck, and then the left and right sides of the upper enclosure 1 are welded to the bulkheads on the left and right sides, that is, Figure 3 Welding is performed in the order of 1A, 1B and 1C. Since the contact point between the bulkhead and the upper enclosure 1 is located at the corner, the possibility of deformation is small, so it is cut according to the size measured in advance, and at this time, the left and right sizes of the upper enclosure 1 can generally be guaranteed to fit. If it is found during the welding process that the left and right length dimensions of the upper enclosure 1 do not match the dimensions of the bulkheads on both sides, the left and right sides of the upper enclosure 1 can also be welded before welding.

[0032] After that, the upper horizontal transition plate 2 needs to be installed at the bottom of the upper enclosure 1. The upper horizontal transition plate 2 is a horizontally placed steel plate. The lower edge of the upper enclosure 1 is welded and connected to the middle position of the upper horizontal transition plate 2, that is, the position shown in Figure 2A. During welding, the upper surface of the upper horizontal transition plate 2 is fixedly connected to the lower edge of the upper enclosure 1, and the left and right sides of the upper horizontal transition plate 2 are fixedly connected to the bulkheads on both sides. Similarly, the upper horizontal transition plate 2 can also be cut according to the actual size, at which time the left and right sizes of the upper horizontal transition plate 2 can generally be guaranteed to be adapted. If it is found that the left and right sizes of the upper horizontal transition plate 2 are larger during the welding process, it can also be cut before welding. After the connection is completed, the upper enclosure 1 and the upper horizontal transition plate 2 will become a T-shaped structure. The upper enclosure 1 and the upper horizontal transition plate 2 are installed separately for convenience and cutting when the size is not suitable. Of course, in other embodiments, the upper enclosure 1 and the upper horizontal transition plate 2 may be welded together first, and then the upper enclosure 1 and the upper horizontal transition plate 2 may be assembled in the cabin as a whole.

[0033] After the upper enclosure 1 and the upper horizontal transition plate 2 are installed, the groove plate 3 needs to be installed. Since there are two groove plates 3, one of them is installed first. During installation, since the bulkhead may be deformed, a margin needs to be set on the groove plate 3. In this embodiment, the sum of the left and right dimensions of the two groove plates 3 is greater than the actual dimension between the two bulkheads. During installation, one of the groove plates 3 is installed first, and when the second groove plate 3 is installed, the excess part is cut off and then installed. In actual settings, the two groove plates 3 can be set to the same size, and the second groove plate 3 can be cut when the second groove plate 3 is installed. The margin can also be directly reserved on the second groove plate 3. After cutting, the two groove plates 3 are of similar size. Removing the margin when the second groove plate 3 is installed can minimize measurement errors and assembly errors.

[0034] Specifically, when installing the first trough plate 3, first weld the vertical edge of the trough plate 3 to the bulkhead, then weld the upper edge of the first trough plate 3 to the upper horizontal transition plate 2, and then install and fix the first trough plate 3. Then, the second trough plate 3 needs to be installed. When installing, first weld the vertical edge of the second trough plate 3 close to the first trough plate 3 to the first trough plate 3, then weld the upper edge of the second trough plate 3 to the upper horizontal transition plate 2, and finally weld the other vertical edge of the second trough plate 3 to the bulkhead, that is, according to Figure 3The second grooved plate 3 is welded in the order of 3A, 3B, 3C, 3D and 3E. Since the second grooved plate 3 has a surplus, it needs to be cut off. When cutting, the form of cutting and welding is adopted. The vertical edge to be cut off of the second grooved plate 3 is divided into multiple sections, such as cutting off every 100 mm as a section, and cutting off a section is welding a section. After completing the welding of the section, another section is cut off. During the cutting process, the grooved plate 3 will generate heat, and this heat will cause the grooved plate 3 to expand and contract with heat, and its edge position will be deformed. Cutting off a section is welding a section to minimize the deformation caused by heat during cutting, which can not only improve the flatness of the welding position but also reduce the dimensional deviation caused by deformation. Of course, in other embodiments, all edges with surplus can also be cut off, and the deformed area can be trimmed before welding to minimize the error. Alternatively, in other embodiments, the edge of the second grooved plate 3 close to the bulkhead may be welded to the bulkhead first, and the remainder may be arranged at the junction of the two grooved plates 3. The overlapping portions of the two grooved plates 3 may be cut off before welding to keep the two grooved plates 3 in a butt-jointed state.

[0035] Then, the lower horizontal transition plate 4 is welded. When welding, the upper surface of the lower horizontal transition plate 4 is welded to the lower surface of the grooved plate 3. Then, the left and right edges of the lower horizontal transition plate 4 are welded to the bulkheads on both sides. The installation of the lower horizontal transition plate 4 is completed, that is, the position shown in the figure. Like the upper horizontal transition plate 2, if it is found that the left and right dimensions of the lower horizontal transition plate 4 are larger during the welding process, it can also be cut before welding.

[0036] Finally, the lower enclosure 5 is installed. During manufacturing, the lower enclosure 5 is provided with a margin in the vertical direction. During welding, the upper edge of the lower enclosure 5 is first welded to the lower horizontal transition plate 4, and then the left and right edges of the lower enclosure 5 are welded to the bulkheads on both sides. Of course, as with the upper enclosure 1, during welding, if the left and right lengths of the lower enclosure 5 are larger than the actual dimensions of the bulkheads on both sides, the excess part needs to be cut off first. Finally, the lower edge of the lower enclosure 5 is welded to the deck, that is, according to Figure 3 The lower enclosure 5 is welded in the order of 5A, 5B, 5C and 5D. Since the lower enclosure 5 has a margin, it needs to be cut. Specifically, before cutting, the part that needs to be cut is first marked according to the actual size. For the marked area, the cutting is carried out in the form of cutting and welding. The lower enclosure 5 is divided into sections along the left and right length directions, such as cutting every 100 mm as a section, and cutting a section is welding a section. After completing the welding of the section, another section is cut off until the entire lower surface of the lower enclosure 5 is completely cut. Of course, in other embodiments, the lower horizontal transition plate and the lower enclosure 5 can be welded into a whole before being welded and fixed.

[0037] The essence of welding is to use welding rods or flames to heat and form a molten pool. After the molten pool cools, different parts can be combined. During the cooling process of the molten pool, a shrinkage effect will occur, causing the material around the molten pool to produce a shrinkage prestress. Since the groove plate 3, the enclosure and the horizontal transition plate are all thin plates, when there is a shrinkage prestress, the plate will shrink and deform, and eventually the actual edge area will be smaller than the original edge size. In order to reduce the impact of this deformation on the assembly accuracy, spot welding is used during welding to reduce the number of molten pools formed and reduce this impact. In addition, after completing a spot welding, use a wooden hammer or a rubber hammer to hammer the weld at that location to reduce the shrinkage at the weld. When hammering, it should be noted that the temperature of the weld is lowered to below the preset temperature. The temperature of the weld drops quickly. Usually, it can be determined based on the number of knocks. Generally, the knocks have roughly the same interval, and the number of knocks is used to determine whether it has dropped below the set temperature. Alternatively, it can be determined by visual observation of the color and shape of the weld to determine whether it has dropped below the preset temperature, and it can also be determined by time. Alternatively, in other embodiments, instead of using a wooden hammer or a rubber hammer, an iron hammer may be used for tapping, and care should be taken to control the force when tapping to avoid deforming the plate.

[0038] In addition, in order to further reduce the deformation of the plate during welding, the longer edges are welded from the middle to the two ends. Since the middle has been fixed and is in a suitable position, even if the two ends shrink during welding, the shrinkage will be reduced, that is, all the shrinkage is borne by the two sides, so that the deformation of each end is reduced. Of course, in other implementations, the two ends can be welded and fixed before welding, and the middle part can be welded after the position is determined.

[0039] It should be clear that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for assembling a grooved wall for ship hull modification, characterized in that: First, transport the various components of the trough-shaped enclosure to the location to be installed, then weld the enclosure on one side and the horizontal transition plate corresponding to the enclosure to the deck, then weld multiple trough-shaped plates to the above-mentioned horizontal transition plates, and cut off the horizontal excess of the trough-shaped plate when welding the last trough-shaped plate; finally, weld the enclosure on the other side and the horizontal transition plate corresponding to the enclosure to the deck and the trough-shaped plate, and cut off the excess of the enclosure on this side in the upper and lower directions before welding.

2. The method for assembling a grooved wall for a ship hull modification according to claim 1, characterized in that: The first side of the enclosure to be installed is the upper enclosure, and the last side of the enclosure to be installed is the lower enclosure. Allowances are set in the upper and lower directions of the lower enclosure.

3. The method for assembling a grooved wall for ship hull modification according to claim 2, characterized in that: Before cutting the lower sill, measure the gap between the groove plate and the deck and mark the part to be cut on the lower sill.

4. The method for assembling a trough-shaped enclosure wall for ship hull modification according to any one of claims 1 to 3, characterized in that: The horizontal edges of the enclosure and the vertical edges of the grooved plates are welded in the order from the middle to the two ends.

5. The method for assembling a grooved wall for ship hull modification according to any one of claims 1 to 3, characterized in that: Spot welding is used during welding, and after completing a spot weld, a tool is used to hammer the weld point to reduce shrinkage at the weld point.

6. The method for assembling a grooved wall for ship hull modification according to claim 5, characterized in that: The solder joint is hammered until the temperature of the solder joint drops below the preset temperature.

7. The method for assembling a grooved wall for ship hull modification according to claim 5, characterized in that: Use a wooden or rubber hammer when hammering.

8. The method for assembling a grooved wall for ship hull modification according to any one of claims 1 to 3, characterized in that: When cutting the horizontal margin of the grooved plate, the grooved plate is divided into at least three sections in the up and down direction, and the sections are cut in sequence. After cutting one section and before cutting another section, the cut section is welded first.

9. The method for assembling a grooved wall for ship hull modification according to any one of claims 1 to 3, characterized in that: When installing the enclosure, measure the horizontal size of the enclosure and the size of the reserved space. If the size of the enclosure is larger than the size of the reserved space, cut off the horizontal excess of the enclosure.

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