An apparatus and method for installing short welded pipes in the bottom plate of a ship's hull shape area.

Abstract

This invention discloses an apparatus and method for installing short welded pipes on the bottom plate of a ship's hull. The apparatus includes a main body, which comprises a horizontal pipe, a horizontal adjustment pipe, and a positioning plate fixed to a controllable magnet base via a vertical pipe. The positioning plate has flange positioning holes that match the distribution of flange holes on the flange of the short welded pipe, and the rotation angle of the flange positioning holes is consistent with the rotation angle of the flange hole at the intended installation location. Based on the coordinates of the opening center on the drawing, the invention uses the base to adhere to the bottom plate and adjusts the orientation of the horizontal pipe and the length of the horizontal adjustment pipe so that the projection of the center of the positioning plate falls on the opening center. Simultaneously, according to the height and rotation angle requirements of the short welded pipe in the drawing, the short welded pipe is installed on the apparatus. This achieves the positioning inspection of the opening line before opening and the positioning and installation of the short welded pipe after opening, improving accuracy and efficiency, reducing costs, and enhancing operational convenience and adaptability.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a device and method for installing short pipes welded to the bottom plate of a ship's hull shape. Background Technology

[0002] In traditional shipbuilding, the fabrication, drilling, and installation of pipe systems is a complex and labor-intensive project. Pipe fabrication typically involves two steps: First, pre-fabrication is done in the production workshop based on the layout plan, creating part drawings. This pre-layout method is suitable for most pipes, especially larger diameter ones, as it reduces the complexity of on-site construction. Second, on-site layout is used for smaller sections of pipes where fabrication is necessary due to unpredictable factors such as large hull deformation or equipment positioning errors. Pipes are made from a variety of materials, including steel, stainless steel, copper, copper-nickel alloy, pure copper, and plastic-coated pipes.

[0003] Marine seawater pipes, typically large-diameter pipes around 200mm, are in direct contact with seawater. Using ordinary materials would result in significant corrosion, so for extended service life, they are usually made of expensive materials like alloy pipes or plastic-coated pipes. However, this also means that if a seawater pipe becomes unusable, it incurs high costs. Therefore, the manufacturing and installation of seawater pipes require high precision, especially the precise positioning of the welded short pipe at the suction inlet within the ship's hull line area. Incorrect positioning will prevent installation, potentially rendering the entire pipe or even several pipes unusable. This welded short pipe serves as a layout pipe, with a flange fixed to one end.

[0004] Traditional hole positioning methods rely primarily on workers using measuring tapes for measurement, but this method has significant drawbacks. For example, the hole data provided on construction layout and installation drawings is usually based on the horizontal dimension (Y-axis) width of the ship. However, during on-site construction measurements, due to the linear curved surface of the inner bottom plate, the actual horizontal distance between the marked hole and the ship's centerline is often less than the distance required by the construction drawings, resulting in the seawater pipes failing to be installed correctly. Furthermore, relying on visual inspection or measuring tapes for positioning can lead to inaccurate positioning of the flange height of the first welded suction pipe from the inner bottom plate in the Z-axis elevation direction. Inaccurate positioning in the Z-axis elevation direction can also cause installation errors if the suction pipe is directly welded. Therefore, traditional hole positioning methods, without the aid of any instruments or tooling, rely entirely on the visual inspection and experience of construction workers for both hole positioning and installation. This easily leads to errors in hole positioning in the Y-axis width direction and inaccurate positioning of the suction pipe's height in the Z-axis elevation direction, significantly increasing the risk of hole errors and seawater pipe failure.

[0005] Furthermore, to conform to the routing of the piping system, the pipes in the system have rotation angles, and the rotation angles of the pipes are controlled by the corresponding flange holes on the adjacent flanges between the pipes. Therefore, during the installation of the pipeline, if the flange angle on the first welded suction pipe, which serves as the initial reference for the rotation angle in the piping system, is not installed according to the specified rotation angle in the installation drawings, this installation error will cause the routing of all subsequent pipes to deviate. In severe cases, it may cause the pipes that are expected to face the bow to face the stern during the connection process, or it may cause the equipment to be connected to the pipes to be unable to be installed. When the installation angle deviation of the pipes equipped with valves accumulates, it may also cause problems such as the valves on the side of the ship being installed backwards.

[0006] While total stations can be used to assist in the marking and positioning of welded short pipe openings in existing technologies, they have very high environmental requirements. They need to operate under static conditions free from construction vibration throughout the entire section. Shipyard construction environments are generally harsh, with numerous overlapping operations, making it impossible to meet the required static environment. Even if the stringent static environmental conditions are met, issues such as flange angles and heights mean that the total station alone cannot achieve the required positioning and installation accuracy.

[0007] Therefore, there is an urgent need to invent a new positioning and verification installation method to improve the installation accuracy and efficiency of short pipes welded to the bottom plate within the ship's hull area and reduce material waste. Summary of the Invention

[0008] To address the problems existing in the prior art, the present invention aims to provide a device and method for installing short welding pipes on the bottom plate of a ship's hull. Through the simple, specialized device and method designed in this invention, the Z-axis positioning height of the welding suction short pipe can be accurately positioned, achieving precise vertical positioning and installation of the welding suction short pipe along the Z-axis. Simultaneously, it correctly addresses the rotation angle issue of the short pipe flange bolt holes during welding. Furthermore, the welding suction short pipe can be horizontally suspended during spot welding, eliminating the need for a specialized lifting device. This not only improves the accuracy and efficiency of positioning verification but also reduces costs and enhances operational convenience and adaptability, demonstrating significant practicality and innovation. Moreover, this invention can also be applied to the positioning of seawater pipe inlets, as well as for marking, positioning, and installation of flushing pipes and vent pipes in subsea valve boxes, exhibiting wide applicability.

[0009] To achieve the above and other related objectives, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides an apparatus for installing a short welded tube on the bottom plate of a ship's hull shape area. The short welded tube has a flange fixed to its upper end face, and the flange has a flange hole. The apparatus includes a body; the body includes a controllable magnet base, a vertical tube, a horizontal tube, a horizontal adjustment tube, and a positioning plate; a vertical tube is fixed at the center of the upper end face of the controllable magnet base, and the vertical tube has a vertical height scale indicating the distance from the lower end face of the positioning plate to the lower end face of the controllable magnet base; the horizontal tube is fitted with the horizontal adjustment tube at one end of the horizontal tube, and the horizontal adjustment tube moves horizontally left and right along the central axis of the horizontal tube and is locked in place by fasteners. A horizontal pipe is mounted on a vertical pipe, which is vertically inserted through the wall of the other end of the horizontal pipe. The horizontal pipe moves vertically up and down along the central axis of the vertical pipe and is locked and fixed to the vertical pipe by fasteners. The positioning plate is fixed to the end of the horizontal adjusting pipe away from the horizontal pipe. The horizontal adjusting pipe is provided with a horizontal length scale, which shows the distance from the center of the positioning plate to the central axis of the vertical pipe. The positioning plate is an annular plate with flange positioning holes. The flange positioning holes are matched with the flange holes on the flange, and the angle of the flange positioning holes is consistent with the angle of the flange hole at the intended installation location.

[0011] A second aspect of the present invention provides a method for installing short welded pipes in the bottom plate of a ship's hull shape area, comprising the following steps:

[0012] S1. Prepare the apparatus described above;

[0013] S2. According to the coordinates of the center of the opening on the drawing, install the controllable magnet base on the bottom plate at the center line of the ship, and at the same time adjust the orientation of the horizontal tube and the length of the horizontal adjustment tube so that the projection of the center of the positioning base plate falls on the center of the opening.

[0014] S3. According to the height and angle requirements of the welding short pipe in the drawing, adjust the height of the device to be higher than the flange pre-installation height, and fix the welding short pipe on the positioning plate.

[0015] S4. Once the holes on the base plate have been opened, the welding short pipe is positioned and installed on the base plate by adjusting the height of the device.

[0016] As a preferred technical solution, the specific steps in step S2 include:

[0017] S2-1. According to the coordinates (X, Y) of the center of the opening on the drawing, where X is the rib number where the center of the opening is located and Y is the distance from the center of the opening to the ship's centerline, the controllable magnet base is fixed to the base plate by magnetic attraction. The center of the controllable magnet base is located at the intersection of the ship's centerline on the base plate and the rib with the corresponding number X.

[0018] S2-2. At the same time, adjust the orientation of the horizontal tube so that the orientation of the horizontal tube coincides with the direction of the rib where the center of the opening is located.

[0019] S2-3. Adjust the length of the horizontal adjustment tube, and lock it in place after the length scale displays the Y value.

[0020] As a preferred technical solution, the device in step S1 further includes a level, which is installed on the level tube, and in step S2, the levelness is monitored by the level.

[0021] As a preferred technical solution, the specific steps in step S3 include: adjusting the height of the horizontal pipe on the vertical pipe until the height scale display value is higher than the height required for the welded short pipe in the drawing; aligning the flange holes with the flange positioning holes one by one and tightening them so that the rotation direction of the welded short pipe is consistent with the rotation angle requirement of the welded short pipe in the drawing, and the central axis of the welded short pipe coincides with the central axis of the positioning base plate.

[0022] As a preferred technical solution, in step S3, when the flanges on the welded short pipe have different sizes and / or different flange hole distributions, the device in step S1 further includes a transition flange. The transition flange has a transition hole and a connecting hole. The transition hole has a shape and position that matches the flange positioning hole, and the connecting hole has a shape and position that matches the flange hole, so that the flange is fixed to the positioning base plate through the transition flange. The rotation angle of the connecting hole is consistent with the rotation angle of the flange hole at the pre-installation location.

[0023] As a preferred technical solution, step S4 further includes the following steps: when the opening line is marked on the bottom plate before the opening, the opening line is positioned and inspected by a device.

[0024] Furthermore, the specific steps of positioning and inspecting the opening line using the device in step S4 include:

[0025] Lower the height of the horizontal pipe on the vertical pipe until the lower end of the welded short pipe contacts the bottom plate of the hull. Check the marking of the perforation line by observing whether each contact point at the lower end of the welded short pipe falls on the perforation line.

[0026] If all the holes fall on the perforation line, it means that the current perforation line meets the drawing requirements. Complete the re-inspection of the perforation line and perform the perforation operation, and then perform the welding short pipe positioning and installation operation.

[0027] If the hole does not fall on the opening line, it means that the current opening line does not meet the requirements of the drawing. The position of the opening line should be corrected or redrawn along the wall of the welded short pipe. The opening operation should be carried out according to the corrected or redrawn opening line, and then the welding short pipe positioning and installation operation should be carried out.

[0028] As a further preferred technical solution, the specific steps of positioning and installing the welded short pipe in step S4 include: lowering the height of the horizontal pipe on the vertical pipe so that the welded short pipe passes through the opening on the bottom plate of the hull until the height scale reading meets the installation height position requirements in the drawing; fixing the welded short pipe to the bottom plate by spot welding; removing and retrieving the device, and then welding and fixing the welded short pipe to the bottom plate by full welding along the spot welding position, thus completing the installation of the welded short pipe on the bottom plate.

[0029] As described above, the present invention has the following beneficial effects:

[0030] (1) The present invention provides an apparatus and method for installing short welded pipes in the bottom plate of a ship's line shape area. Through the efficient use of the apparatus, the accuracy of the opening positioning of the seawater welding suction short pipe can be verified. At the same time, the height dimension and flange angle of the seawater welding suction short pipe can also be accurately positioned and installed.

[0031] (2) The device and method for installing short welded pipes in the bottom plate of the ship's line shape area according to the present invention replaces the lifting device before the traditional spot welding installation and positioning of seawater welded short pipes by adjusting the height of the horizontal pipe on the vertical pipe, saving device cost and labor cost, and making it more convenient to use.

[0032] (3) The present invention provides an apparatus and method for installing short welded pipes in the bottom plate of a ship's hull shape area. By adjusting the horizontal extension and retraction of the apparatus and reading the length scale, the positioning accuracy of the opening line under different coordinate distances from the midships can be verified in the Y-axis width direction, so that the same apparatus can verify the opening line at different coordinates at the same time. At the same time, by adjusting the height of the apparatus and reading the height scale, the height of the seawater welding short pipe can be adjusted in the Z-axis height direction to solve the problem of accurate positioning and installation between the welding suction short pipe and the inner bottom plate of the hull shape in the vertical direction of the Z-axis.

[0033] (4) The device and method for installing short welded pipes in the bottom plate of the ship's line area according to the present invention can ensure the accuracy of the flange's rotation direction by using a simple special device and a temporary connection between the positioning seat plate and the flange. In addition, the transition flange can further adapt to the positioning and installation of flanges of different sizes and bolt hole orientations, avoiding the problem of failure to connect with the seawater short pipe due to incorrect rotation angle of the flange bolt hole. This ensures the correct positioning and installation of the short welded pipe and allows the short welded pipe to be suspended horizontally during spot welding without the need for a special lifting device.

[0034] (5) The present invention provides an apparatus and method for installing short pipes welded to the bottom plate of a ship's line area. The apparatus has wide applicability and is applicable not only to the positioning of seawater pipe inlet, but also to the marking and positioning of openings for bottom plate welding in the line area of ​​a ship, such as the blow-up pipe and vent pipe of a seabed valve box.

[0035] (6) The device and method for installing short welded pipes in the bottom plate of the ship's line area according to the present invention can ensure that the measured Y-axis dimension is a horizontal dimension and consistent with the horizontal dimension marked on the drawing by using a level on the horizontal pipe, thereby avoiding the error caused by the horizontal deviation of the traditional tape measure and improving the measurement accuracy.

[0036] (7) The present invention provides a device and method for installing short pipes welded to the bottom plate of a ship's hull shape area. The device utilizes a controllable magnetic base to achieve free attraction and release, and uses the free attraction and release magnetism to tightly attract and fix the entire device, thereby improving the stability of the device and the convenience of operation. Attached Figure Description

[0037] Figure 1 This is a schematic cross-sectional view of the hull during the positioning and installation of the short welded pipe on the inner bottom plate in this invention.

[0038] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0039] Figure 3 This is a front view cross-sectional structural diagram of the positioning base plate in this invention.

[0040] Figure 4 This is a top view of the positioning base plate in this invention.

[0041] Figure 5 This is a frontal cross-sectional view of the welded short pipe and flange in this invention.

[0042] Figure 6 This is a top view of a transition flange used to connect an even number of flange holes according to the present invention.

[0043] Figure 7 This is a top view of a transition flange used to connect an odd number of flange holes according to the present invention.

[0044] The specific explanations of the reference numerals in the attached figures are as follows:

[0045] 1. Hull; 11. Inner bottom plating; 12. Outer plating; 13. Centerline;

[0046] 2. Body; 21. Controllable magnet base; 22. Vertical tube; 221. Height scale; 23. Horizontal tube; 231. Locking bolt one; 232. Locking bolt two; 233. Level; 24. Horizontal adjustment tube; 241. Length scale; 25. Positioning base plate; 251. Flange positioning hole;

[0047] 6. Welded short pipe; 61. Flange; 62. Flange hole; 63. Temporary connecting bolts;

[0048] 7. Transition flange; 71. Transition hole; 72. Connection hole. Detailed Implementation

[0049] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0050] In the description of this invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of the embodiments of this invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be construed as a limitation of this invention.

[0051] Example 1

[0052] like Figure 1 and Figure 2 As shown, this embodiment provides a device for installing short welded pipes on the bottom plate of a ship's hull shape, such as... Figure 5 As shown, a flange 61 is fixed to the upper end face of the welded short pipe 6, and a flange hole 62 is provided on the flange 61. The device includes a body 2.

[0053] The main body 2 includes a controllable magnet base 21, a vertical tube 22, a horizontal tube 23, a horizontal adjustment tube 24, and a positioning plate 25. The vertical tube 22 is fixed at the center of the upper surface of the controllable magnet base 21. The vertical tube 22 has a height scale 221 on its wall in the vertical direction, which displays the distance from the lower surface of the positioning plate 25 to the lower surface of the controllable magnet base 21. The height scale 221 is used to read, mark, and adjust the height of the horizontal tube 23 along the Z-axis. The controllable magnet base 21 is equipped with a magnetic switch for controlling the magnetic attraction force. The horizontal tube 23 is open at one end and closed at the other. The vertical tube 22 passes vertically through the wall of the horizontal tube 23 near the closed end, allowing the horizontal tube 23 to move vertically up and down along the central axis of the vertical tube 22. The horizontal tube 23 is locked and fixed to the vertical tube 22 by a locking bolt 231 located on the closed end face. The horizontal adjusting tube 24 is fitted inside the open end of the horizontal tube 23, allowing the horizontal adjusting tube 24 to move horizontally left and right along the central axis of the horizontal tube 23. The horizontal adjusting tube 24 is locked and fixed to the horizontal tube 23 by locking bolts 232 set on the tube wall of the horizontal tube 23. The positioning base plate 25 is fixed to the end of the horizontal adjusting tube 24 away from the horizontal tube 23. The tube wall of the horizontal adjusting tube 24 has a length scale 241 in the horizontal direction. The length scale 241 displays the distance from the center of the positioning base plate 25 to the central axis of the vertical tube. The length scale 241 is used to read, mark and adjust the opening distance from the midships dimension in the Y-axis direction.

[0054] In this embodiment, as Figure 3 and Figure 4 As shown, the positioning plate 25 is an annular plate, and the positioning plate 25 is provided with a flange positioning hole 251. The flange positioning hole 251 is matched with the flange hole 62 on the flange 61, and the rotation angle of the flange positioning hole 251 is consistent with the rotation angle of the flange hole 62 at the intended installation location.

[0055] In other embodiments, such as Figure 6 and Figure 7 As shown, when the flanges 61 on the welded short pipe 6 have different sizes and / or the flange holes 62 are distributed differently, the device also includes a transition flange 7. The transition flange 7 has a transition hole 71 and a connecting hole 72. The transition hole 71 has a shape and position that matches the flange positioning hole 251, and the connecting hole 72 has a shape and position that matches the flange hole 62, so that the flange 61 is temporarily fixed to the positioning base plate 25 through the transition flange 7. The rotation angle of the connecting hole 72 is consistent with the rotation angle of the flange hole 62 at the intended installation location.

[0056] Example 2

[0057] like Figure 1 and Figure 2 As shown, this embodiment provides a method for installing a short pipe 6 welded to the bottom plate of a ship's hull shape area using an apparatus from Embodiment 1. The method is used for positioning inspection and positioning installation. The bottom plate includes an inner bottom plate 11 or an outer plate 12. The method includes the following steps:

[0058] S1. Prepare a device for installing short welded pipes 6 in the bottom plate of the ship's line shape area, as described in Example 1.

[0059] S2. Based on the coordinates of the center of the opening on the drawing, install the controllable magnet base 21 on the base plate at the center line 13 of the ship, and adjust the orientation and length of the horizontal tube 23 so that the projection of the center of the positioning plate 25 falls on the center of the opening.

[0060] According to the coordinates (X, Y) of the opening center on the drawing, where X is the rib number where the opening center is located and Y is the distance from the opening center to the ship's centerline 13, at the corresponding numbered rib on the ship's centerline 13, the controllable magnetic base 21 is magnetically attached to the bottom plate of the hull 1 by turning on the magnetic switch. The center of the controllable magnetic base 21 is located at the intersection of the ship's centerline 13 on the bottom plate of the hull 1 and the rib with the corresponding number X. The orientation of the horizontal tube 23 is adjusted to coincide with the direction of the rib where the opening center is located. The length of the horizontal adjusting tube 24 inside the horizontal tube 23 is adjusted by the locking bolt 232 until the length scale 241 displays the Y value, and then locked and fixed, so that the reading of the length scale 241 meets the requirement of the distance between the opening center position and the midships in the drawing. At this time, the center of the positioning plate 25 coincides with the opening center.

[0061] In other embodiments, the level tube 23 is also equipped with a level 233. By monitoring the levelness through the level 233, it can be further confirmed that the level tube 23 is always level, thereby ensuring that the positioning base plate 25 used to locate the center of the opening is also always level. If the level 233 finds that it is not level, the levelness of the level tube 23 can be adjusted by placing a shim under the controllable magnet base 21 or by setting an adjusting bolt on the controllable magnet base 21.

[0062] S3. According to the height and angle requirements of the welding short pipe 6 in the drawing, install the welding short pipe 6 on the positioning base plate 25: adjust the height of the device to be higher than the pre-installation height of the flange 61, and fix the welding short pipe 6 on the positioning base plate 25. The flange hole 62 corresponds one-to-one with the flange positioning hole 251.

[0063] S3-1. Based on the height of the welded short pipe 6 in the drawing, that is, the height H of the upper plane of the flange 61 of the welded short pipe 6 in the drawing, adjust the height of the horizontal pipe 23 on the vertical pipe by tightening the locking bolt 231 until the value displayed by the height scale 221 is higher than the value of the upper plane height H of the flange 61 required by the drawing.

[0064] S3-2. According to the angle requirements of the welded short pipe 6 on the drawing, the flange hole 62 on the flange 61 and the flange positioning hole 251 on the positioning plate 25 are matched one by one and tightened by temporary connecting bolts 63, so that the angle of the welded short pipe 6 conforms to the angle requirements of the welded short pipe 6 on the drawing; the welded short pipe 6 is temporarily fixed to the positioning plate 25 by the flange 61. At this time, the central axis of the welded short pipe 6 coincides with the central axis of the positioning plate 25.

[0065] S4. After marking the opening line at the intended opening position, the device can be used to perform pre-opening inspection work; and after opening, the device can be used to install the welding short pipe 6.

[0066] S4-1. When the hole opening line is marked on the bottom plate before the hole is opened, the hole opening line is positioned and inspected by the device.

[0067] Lower the height of the horizontal pipe 23 on the vertical pipe by tightening bolt 231 until the lower end of the welded short pipe 6 contacts the bottom plate of the hull 1. Check the marking of the perforation line by observing whether each contact point at the lower end of the welded short pipe 6 falls on the perforation line.

[0068] If all the holes fall on the opening line, it means that the current opening line meets the drawing requirements. Complete the re-inspection of the opening line and perform the opening operation, and then perform the installation operation of the welding short pipe 6. If the holes do not fall on the opening line, it means that the current opening line does not meet the drawing requirements. The position of the opening line can be corrected or redrawn along the wall of the welding short pipe 6 using a scribing pen, thereby improving the accuracy of the opening position on the curved bottom plate in the hull 1 linear area. Perform the opening operation according to the corrected or redrawn opening line, and then perform the installation operation of the welding short pipe 6.

[0069] S4-2. When the hole on the base plate has been completed, the welding short pipe 6 is positioned and installed on the base plate using the device: the welding short pipe 6 is positioned and adjusted to the height position shown in the drawing using the device, and the welding short pipe 6 is fixed on the base plate; the device is removed to complete the positioning and installation of the welding short pipe 6 on the base plate.

[0070] Specifically, by tightening bolt 231, the height of the horizontal pipe 23 on the vertical pipe is reduced, allowing the welded short pipe 6 to pass through the opening on the bottom plate of the hull 1 until the height scale 221 reading meets the installation height requirements in the drawing; the welded short pipe 6 is fixed to the bottom plate by spot welding; the device is removed by loosening the temporary connecting bolt 63 and recycled, thereby avoiding the deformation effect of the device caused by the heat released during the welding operation, ensuring the reusability of the device, and then the welded short pipe 6 is welded and fixed to the bottom plate by full welding along the spot welding position, completing the installation of the welded short pipe 6 on the bottom plate.

[0071] In this embodiment, the drawing requirements are as follows: the coordinates of the seawater pipe suction port opening on the ship are (X = F122#, Y = 2800), that is, the center coordinates of the opening of the seawater pipe welding short pipe 6 installation hole are located at the position of rib 122# of the hull 1, 132800mm vertically from the center line of the hull 1, and the opening diameter of the welding short pipe 6 installation hole is 255mm; the height of the upper plane of the flange 61 is H = 200mm, and the height of the upper plane of the flange 61 is the distance from the center of the opening at the opening on the inner bottom plate 11 to the upper plane of the flange 61.

[0072] Therefore, according to the drawing requirements, the center of the controllable magnet base 21 is placed at the rib 122# of the hull 1 section on the ship's centerline 13. The horizontal tube 23 is raised to a height of more than 200mm to ensure that the distance from the center of the opening to the lower end face of the positioning plate 25 of the welded short tube 6 is greater than 200mm. The horizontal tube 23 is locked and fixed to the vertical tube 22 by the locking bolt 231 on the closed end of the horizontal tube 23. The horizontal adjustment tube 24 is inserted into the open end of the horizontal tube 23. The levelness is observed and tested by the level instrument 233. Since the hull 1 centerline 13 where the controllable magnet base 21 is installed is a horizontal plane, the horizontal tube 23, which is set parallel to the controllable magnet base 21 through the vertical tube 22, generally also meets the levelness requirements.

[0073] Using temporary connecting bolts 63, flange 61 is fixed to positioning base plate 25. At this time, since the flange positioning hole 251 on positioning base plate 25 is consistent with the preset angle on the drawing, the flange hole 62 on flange 61 is matched with the flange positioning hole 251 on positioning base plate 25 one-to-one, thus ensuring that the angle of flange hole 62 is consistent with the drawing. Then, by adjusting the height of horizontal pipe 23 to the height scale 221200mm, that is, adjusting the height of the upper plane of flange 61 to 200mm and locking it, the stability during spot welding is ensured.

[0074] In other embodiments, when the flange hole 62 on flange 61 does not match the flange positioning hole 251 on positioning plate 25, flange 61 is fixed to positioning plate 25 by transition flange 7. Assuming the thickness of transition flange 7 is n, the height of horizontal pipe 23 is adjusted to the height scale 221200+n, that is, the actual height of the upper plane of flange 61 is still adjusted to 200mm, so that the height and angle of seawater pipe welding short pipe 6 meet the installation requirements of the drawing. Figure 6 and Figure 7 As shown, since the flange holes 62 of flange 61 include an odd or even number, the connecting holes 72 of transition flange 7 are correspondingly provided with the same number, and the distribution angle of the connecting holes 72 is the same as the rotation angle for positioning and installing the welded short pipe 6 in the drawing. The welded short pipe 6 is fixed to the inner base plate 11 by spot welding. The entire assembly is then removed, and a full welding operation is performed between the welded short pipe 6 and the inner base plate 11 to complete the positioning and installation of the welded short pipe 6. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A device for installing a welded short pipe of a ship line region bottom plate, the upper end surface of the welded short pipe (6) is fixed with a flange (61), and a flange hole (62) is formed in the flange (61), characterized in that, The device comprises a body (2); the body (2) comprises a controllable magnet base (21), a vertical pipe (22), a horizontal pipe (23), a horizontal adjusting pipe (24) and a positioning seat plate (25); the vertical pipe (22) is fixed at the middle position of the upper end surface of the controllable magnet base (21), the vertical pipe (22) is provided with a vertical height scale (221), the height scale (221) shows the distance from the lower end surface of the positioning seat plate (25) to the lower end surface of the controllable magnet base (21); the horizontal pipe (23) is sleeved with the horizontal adjusting pipe (24) at one end, the horizontal adjusting pipe (24) moves horizontally along the central axis of the horizontal pipe (23) and is locked and fixed on the horizontal pipe (23) through a fastener; the other end of the horizontal pipe (23) is vertically penetrated by the vertical pipe (22), the horizontal pipe (23) moves vertically along the central axis of the vertical pipe (22) and is locked and fixed on the vertical pipe (22) through a fastener; the end of the horizontal adjusting pipe (24) away from the horizontal pipe (23) is fixed with the positioning seat plate (25), the horizontal adjusting pipe (24) is provided with a horizontal length scale (241), the length scale (241) shows the distance from the center of the positioning seat plate (25) to the central axis of the vertical pipe (22); the positioning seat plate (25) is an annular plate, the positioning seat plate (25) is provided with a flange positioning hole (251), the flange positioning hole (251) is matched with the distribution position of the flange hole (62) on the flange (61), and the turning angle direction of the flange positioning hole (251) is consistent with the turning angle direction of the preliminary mounting position of the flange hole (62).

2. A method for ship lines area floor weld stub installation, characterized by, The device comprises the following steps: S1, preparing the device as claimed in claim 1; S2, according to the coordinates of the hole center on the drawing, installing the controllable magnet base (21) on the bottom plate at the centerline (13) of the ship, and adjusting the orientation of the horizontal pipe (23) and the length of the horizontal adjusting pipe (24) so that the projection of the center of the positioning seat plate (25) falls on the hole center; S3, according to the height and turning angle requirements of the welding short pipe (6) on the drawing, adjusting the height of the device to be higher than the preliminary mounting height of the flange (61), and fixing the welding short pipe (6) on the positioning seat plate (25); S4, when the hole on the bottom plate is completed, positioning and installing the welding short pipe (6) on the bottom plate by adjusting the height of the device.

3. A method for installing a short tube for a ship line region bottom plate welding according to claim 2, characterized in that, The specific steps in step S2 include: S2-1, according to the coordinates (X, Y) of the hole center on the drawing, the X value is the rib position number where the hole center is located, and the Y value is the distance from the hole center to the centerline (13) of the ship, the controllable magnet base (21) is fixed on the bottom plate by magnetic attraction, and the center of the controllable magnet base (21) is located at the intersection of the centerline (13) of the ship and the rib position corresponding to the X value; S2-2, at the same time, adjust the orientation of the horizontal pipe (23) so that the orientation of the horizontal pipe (23) is consistent with the direction of the rib position where the hole center is located. S2-3, adjust the length of the horizontal adjusting pipe (24), and lock and fix after the length scale (241) displays the Y value.

4. A method for installing a short tube for a ship's line region floor welding according to claim 2 or 3, characterized in that, The device in step S1 further comprises a level (233) arranged on the horizontal pipe (23), and the level (233) is used to monitor the levelness in step S2.

5. A method for installing a short tube for a ship's line region floor welding according to claim 2, wherein The specific steps in step S3 include: adjusting the height of the horizontal pipe (23) on the vertical pipe (22) until the height scale (221) displays a value higher than the required height of the welded short pipe (6) on the drawing; corresponding the flange holes (62) with the flange positioning holes (251) and tightly fixing them so that the corner of the welded short pipe (6) faces the same direction as the corner of the welded short pipe (6) on the drawing, and the center axis of the welded short pipe (6) coincides with the center axis of the positioning seat plate (25).

6. A method for installing a short tube for a ship line region bottom plate welding according to claim 2, wherein When the flanges (61) on the welded short pipes (6) have different sizes and / or the flange holes (62) are distributed differently, the device in step S1 further comprises a transition flange (7) having a transition hole (71) and a connecting hole (72), the transition hole (71) has a shape and a position matched with the flange positioning hole (251), and the connecting hole (72) has a shape and a position matched with the flange hole (62), so that the flange (61) is fixed on the positioning seat plate (25) through the transition flange (7); and the corner angle of the connecting hole (72) faces the same direction as the corner angle of the flange hole (62) where the flange (61) is to be installed.

7. A method for installing a short tube for a ship's line region floor welding according to claim 2, wherein The step S4 further comprises the following steps: when the opening line is drawn on the bottom plate, the opening line is positioned and inspected by the device.

8. A method for installing a short tube for a ship line region bottom plate welding according to claim 7, wherein The specific steps of positioning and inspecting the opening line by the device in step S4 include: The height of the horizontal pipe (23) on the vertical pipe (22) is lowered until the lower end of the welded short pipe (6) contacts the bottom plate of the ship body (1), and the drawing of the opening line is inspected by observing whether each contact point of the lower end of the welded short pipe (6) falls on the opening line; If all the contact points fall on the opening line, it indicates that the current opening line meets the requirements of the drawing, the re-inspection of the opening line is completed, and the opening operation is performed, and then the positioning and installation of the welded short pipe (6) are performed; If not, it indicates that the current opening line does not meet the requirements of the drawing, the position of the opening line is corrected or redrawn along the wall of the welded short pipe (6), the opening operation is performed according to the corrected or redrawn opening line, and then the positioning and installation of the welded short pipe (6) are performed.

9. A method for installing a short tube for a ship's line region floor welding according to claim 2 or 8, characterized in that, The specific steps of positioning and installing the welded short pipe (6) in step S4 include: lowering the height of the horizontal pipe (23) on the vertical pipe (22) so that the welded short pipe (6) passes through the opening on the bottom plate of the ship body (1) until the reading of the height scale (221) meets the installation height position requirements in the drawing; the welded short pipe (6) and the bottom plate are fixed by spot welding; the device is removed and recycled, and then the welded short pipe (6) is welded and fixed on the bottom plate by full welding along the spot welding position, and the installation of the welded short pipe (6) on the bottom plate is completed.

Images