A method for installing large-scale segmented outboard tubes

Abstract

This invention discloses an installation method for a large-section segmented outer tube, which specifically includes the following steps: S1, establishing a three-dimensional coordinate system and determining the center coordinates of the outer tube opening; S2, determining a horizontal frame with the same rib position as the outer plate, selecting a measurement point on the horizontal frame, and determining the coordinates of the measurement point; S3, calculating the angle between the line connecting the measurement point and the center of the outer tube opening and the horizontal frame based on the coordinates of the measurement point and the center coordinates of the outer tube opening; S4, setting a laser at the measurement point, setting the laser irradiation angle according to the obtained angle, so that the laser irradiates the outer plate, and determining the center position of the outer tube opening; S5, marking and drilling at the marked point, and installing the outer tube, completing the installation of the outer tube on the outer plate. This invention reduces the difficulty of determining the installation position of the outer tube by using a laser on the horizontal frame to determine the installation position of the outer tube, facilitating the determination and installation of the outer tube.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to an installation method for large-line segmented outboard tubes. Background Technology

[0002] During the construction of ship sections, pipes are generally pre-assembled during the section construction phase. The installation of outboard tubes is particularly crucial during this pre-assembly phase. Because outboard tubes need to be installed on the outer plating and their shapes are often irregular, they must be installed precisely. Otherwise, the corresponding pipes cannot be connected in the later assembly phase. Incorrect installation can also lead to changes in the hull structure. The center position of the opening for ordinary outboard tubes is usually determined by the hull frame and the position of the plate joints. However, in sections with large hull shapes, the outer plating may have significant hull shapes, and the corresponding frame may also have hull shapes. Furthermore, the position of the plate joints may not be accurate. In such cases, it is difficult to determine the center position of the outboard tube opening, or there may be significant errors. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an installation method for large-section segmented outboard tubes. This invention reduces the difficulty of determining the installation position of the outboard tubes by using a laser instrument on a horizontal frame, thus facilitating the determination and installation of the outboard tubes.

[0004] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows:

[0005] An installation method for large-section segmented outboard tubes, the method specifically includes the following steps:

[0006] S1. Determine the installation coordinates of the outer hull tube on the outer plate, establish a three-dimensional coordinate system, and determine the center coordinates of the opening of the outer hull tube according to the drawing of the outer hull tube parts;

[0007] S2, determine the horizontal frame at the same rib position as the outer plate where the outer tube is installed, select measurement points on the horizontal frame, and determine the coordinates of the measurement points;

[0008] S3, calculate the angle between the line connecting the selected measurement point and the center of the sprue outer pipe opening and the horizontal frame based on the selected measurement point coordinates and the center of the sprue outer pipe opening.

[0009] S4. Set up a laser instrument at the measurement point, set the laser instrument irradiation angle according to the obtained angle, so that the laser instrument irradiates the outer plate on which the outer tube is installed, determine the center position of the outer tube opening, and mark the irradiation position.

[0010] S5. Mark the points and make holes, and install the outboard tubes to complete the installation of the outboard tubes on the outer plate.

[0011] Furthermore, the three-dimensional coordinates established on the outer plate where the outer hull tube is installed are as follows: the rib direction on the outer plate is the X-axis coordinate, the longitudinal direction on the outer plate is the Y-axis coordinate, and the vertical direction is the Z-axis coordinate.

[0012] Furthermore, determining the three-dimensional coordinates of the measurement point on the horizontal frame specifically involves: determining the position of the horizontal frame with the same rib as the outer plate; based on the determined center coordinates of the outer hull tube opening, drawing a measurement line on the horizontal frame with the same X coordinate as the center of the outer hull tube opening; when the rib direction of the horizontal frame and the rib on the outer plate are in the same plane, selecting a measurement point on the measurement line and measuring the Y coordinate of the measurement point.

[0013] Furthermore, the angle between the line connecting the measuring point and the center of the outer tube opening and the horizontal frame is obtained by: calculating the angle between the line connecting the measuring point and the center of the outer tube opening and the horizontal frame based on the obtained Y and Z coordinate values ​​(Y1, Z1) of the outer tube opening center and the Y and Z coordinate values ​​(Y2, Z2) of the measuring point.

[0014] Specifically:

[0015]

[0016] Where α is the angle between the line connecting the measuring point and the center of the outer tube opening and the horizontal frame.

[0017] Furthermore, after the center of the opening of the outer hull tube is determined by laser, a circle with a diameter of 25mm is drawn with the laser point as the center, and the opening is made with a cutter, and the outer hull tube is installed and welded and fixed.

[0018] Based on the above technical solution, the installation method of the present invention patent for large-scale segmented outboard tubes has achieved the following technical advantages through practical application:

[0019] 1. The present invention provides an installation method for large-section segmented outboard tubes, which reduces the difficulty of determining the installation position of the outboard tubes by using a laser instrument on a horizontal frame, and facilitates the determination and installation of the outboard tubes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the measurement point selection in an installation method for large-scale segmented outboard tubes according to the present invention.

[0021] Figure 2 This is a schematic diagram illustrating the determination of the center of the opening for the outer hull tube in an installation method for large-scale segmented outer hull tubes according to the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0023] like Figure 1 and Figure 2 The present invention pertains to an installation method for large-diameter segmented outboard tubes, and the method specifically includes the following steps:

[0024] S1. Determine the installation coordinates of the outer hull tube on the outer plate 3, establish a three-dimensional coordinate system, and determine the center coordinates of the opening of the outer hull tube according to the drawing of the outer hull tube parts.

[0025] S2, determine the horizontal frame 2 with the same rib position as the outer plate 3 where the outer tube is installed, select measurement point 1 on the horizontal frame 2, and determine the coordinates of measurement point 1;

[0026] S3, calculate the angle between the line connecting the selected measurement point 1 and the center of the sprue outer pipe opening and the horizontal frame 2 based on the coordinates of the selected measurement point 1 and the center of the sprue outer pipe opening.

[0027] S4, set up laser instrument 4 at measurement point 1, set the irradiation angle of laser instrument 4 according to the obtained angle, so that laser instrument 4 irradiates the outer plate 3 on which the outer tube is installed, determine the center position of the opening of the outer tube, and mark the irradiation position.

[0028] S5, mark the points and make holes, and install the outer hull tube to complete the installation of the outer hull tube on the outer plate 3.

[0029] By using a laser instrument 4 to determine the installation position of the outer hull tube on the horizontal frame 2, the difficulty of determining the installation position of the outer hull tube is reduced, making it easier to determine and install the outer hull tube.

[0030] The three-dimensional coordinates established on the outer plate 3 where the outer hull tube is installed are as follows: the rib direction on the outer plate 3 is the X-axis coordinate, the longitudinal direction on the outer plate 3 is the Y-axis coordinate, and the vertical direction is the Z-axis coordinate.

[0031] The specific steps for determining the three-dimensional coordinates of measurement point 1 on the horizontal frame 2 are as follows: determine the position of the horizontal frame 2 with the same rib position as the outer plate 3; based on the determined center coordinates of the outer tube opening, draw a measurement line on the horizontal frame 2 with the same X coordinate as the center of the outer tube opening; when the rib position direction of the horizontal frame 2 and the rib position direction on the outer plate 3 are in the same plane, select measurement point 1 on the measurement line and measure the Y coordinate of measurement point 1.

[0032] The angle between the line connecting the measurement point 1 and the center of the outer pipe opening and the horizontal frame 2 is obtained as follows: based on the obtained Y and Z coordinate values ​​(Y1, Z1) of the outer pipe opening center and the Y and Z coordinate values ​​(Y2, Z2) of the measurement point 1, the angle between the line connecting the measurement point 1 and the center of the outer pipe opening and the horizontal frame 2 is calculated.

[0033] Specifically:

[0034]

[0035] Wherein, α is the angle between the line connecting measurement point 1 and the center of the outer pipe opening and the horizontal frame 2.

[0036] After the center of the opening of the outer hull tube is determined by laser, a circle with a diameter of 25mm is drawn with the laser point as the center, and the opening is made with a cutter. The outer hull tube is then installed and welded in place.

[0037] Example

[0038] ① Determine the installation coordinates of the outer hull tube on the outer plate 3. The coordinates of this outer hull tube are (X=FR31-390,Y=-14265,Z=7044).

[0039] ② Locate the horizontal frame 2 of this segment, i.e., the 4-deck platform, with a height of Z = 10656. Simultaneously, select a point on FR31-390 rib. Calculate the Y value of this point to be 11836 (e.g., Figure 1 ).

[0040] ③ Calculate the angle between the coordinates of the outer tube and the coordinates of measurement point 1, (|7044-10656|) / (14265-11836)=tanα, and find that α is 56.08°.

[0041] ④ Based on the calculated angle, adjust the angle of laser instrument 4 to 56.08°, turn on laser instrument 4, and the position where the laser shines on the outer plate 3 is the center position of the hull-outer tube opening (e.g. Figure 2 )

[0042] ⑤ Using the laser point as the center, draw a circle with a diameter of D=125mm, make a hole with a cutter, install the outer hull pipe, weld, and grind.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for installing large-diameter segmented outboard tubes, characterized in that, The method specifically includes the following steps: S1. Determine the installation coordinates of the outer hull tube on the outer plate, establish a three-dimensional coordinate system, and determine the center coordinates of the opening of the outer hull tube according to the drawing of the outer hull tube parts; The three-dimensional coordinates established on the outer plate where the outer hull tube is installed are as follows: the rib direction on the outer plate is the X-axis coordinate, the longitudinal direction on the outer plate is the Y-axis coordinate, and the vertical direction is the Z-axis coordinate. S2, determine the horizontal frame at the same rib position as the outer plate where the outer tube is installed, select measurement points on the horizontal frame, and determine the coordinates of the measurement points; The specific steps for determining the three-dimensional coordinates of the measurement point on the horizontal frame are as follows: determine the position of the horizontal frame with the same rib as the outer plate; according to the determined center coordinates of the hull-mounted outer tube opening, draw a measurement line on the horizontal frame with the same X coordinate as the center of the hull-mounted outer tube opening; when the rib direction of the horizontal frame and the rib direction on the outer plate are in the same plane, select a measurement point on the measurement line and measure the Y coordinate of the measurement point. S3, calculate the angle between the line connecting the selected measurement point and the center of the sprue outer pipe opening and the horizontal frame based on the selected measurement point coordinates and the center of the sprue outer pipe opening. The angle between the line connecting the measuring point and the center of the outer tube opening and the horizontal frame is obtained by: calculating the angle between the line connecting the measuring point and the center of the outer tube opening and the horizontal frame based on the obtained Y and Z coordinate values ​​(Y1, Z1) of the outer tube opening center and the Y and Z coordinate values ​​(Y2, Z2) of the measuring point. Specifically: in, The angle between the line connecting the measuring point and the center of the hull-side pipe opening and the horizontal frame; S4. Set up a laser instrument at the measurement point, set the laser instrument irradiation angle according to the obtained angle, so that the laser instrument irradiates the outer plate on which the outer tube is installed, determine the center position of the outer tube opening, and mark the irradiation position. S5. Mark the points and make holes, and install the outboard tubes to complete the installation of the outboard tubes on the outer plate.

2. The installation method for large-diameter segmented outboard tubes according to claim 1, characterized in that, After the center of the opening of the outer hull tube is determined by laser, a circle with a diameter of 25mm is drawn with the laser point as the center, and the opening is made with a cutter. The outer hull tube is then installed and welded in place.

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