Installation method for large linear sectional row outboard pipe

Abstract

The invention discloses an installation method for a large linear type segmented row outboard pipe, and the method specifically comprises the following steps: S1, building a three-dimensional coordinate system, and determining a hole center coordinate of the row outboard pipe; s2, a horizontal framework with the same rib position as the outer plate is determined, a measuring point is selected on the horizontal framework, and the coordinate of the measuring point is determined; s3, calculating an included angle between a connecting line of the measuring point and the center of the discharge outboard pipe opening and the horizontal framework according to the coordinates of the measuring point and the coordinates of the center of the discharge outboard pipe opening; s4, a laser instrument is arranged at the measuring point, the irradiation angle of the laser instrument is set according to the obtained included angle degree, the laser instrument irradiates the outer plate, and the center position of the hole formed in the outboard discharging outer pipe is determined; and S5, marking and trepanning are conducted on the marking points, the outboard discharging pipe is installed, and installation of the outboard discharging pipe on the outer plate is completed. The mounting position of the outboard discharging pipe is determined on the horizontal framework through the laser instrument, so that the difficulty in determining the mounting position of the outboard discharging pipe is reduced, and the outboard discharging pipe is convenient to determine and mount.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to an installation method for large linear segmented outboard pipes. Background Art

[0002] During the construction of ship sections, pipes are generally pre-installed in the section stage. In the section pre-installation stage, the installation of the outboard pipe is particularly important, because the outboard pipe needs to be installed on the outer plate, and the shape of the pipe is mostly irregular, so the outboard pipe needs to be accurately installed in place, otherwise the corresponding pipes cannot be connected in the later assembly stage. The wrong installation position will also cause the corresponding hull structure to change. The installation of ordinary outboard pipes usually confirms the center position of the opening based on the hull frame and the position of the panel seam. In large linear sections, because the outer plate has a relatively large linear shape, the corresponding frame may also have a linear shape, and the position of the panel seam may not be accurate. At this time, the position of the center of the outboard pipe opening is difficult to confirm, or there is a large error. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a method for installing a large linear segmented outboard tube. The present invention reduces the difficulty of determining the installation position of the outboard tube by using a laser instrument on a horizontal frame, thereby facilitating the determination and installation of the outboard tube.

[0004] In order to achieve the above invention purpose, the technical solution provided by the present invention is as follows:

[0005] A method for installing a large linear segmented outboard tube, the method specifically comprising the following steps:

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

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

[0008] S3, calculating the angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame according to the selected measuring point coordinates and the center coordinates of the outboard tube opening;

[0009] S4, setting a laser instrument at the measuring point, setting the laser instrument irradiation angle according to the obtained angle, making the laser instrument irradiate the outer plate where the outboard tube is installed, determining the center position of the opening of the outboard tube, and marking the irradiation position;

[0010] S5, mark and drill holes at the marked points, and install the outboard pipe to complete the installation of the outboard pipe on the outer plate.

[0011] Furthermore, the three-dimensional coordinates established on the outer plate on which the outboard tube is installed are specifically: the rib direction on the outer plate is the X-axis coordinate, the middle longitudinal direction on the outer plate is the Y-axis coordinate, and the vertical direction is the Z-axis coordinate.

[0012] Furthermore, the three-dimensional coordinates of the measuring point are determined on the horizontal frame as follows: the horizontal frame position at the same rib position as the outer plate is determined, and a measuring line is drawn on the horizontal frame at the same X-coordinate as the center coordinate of the outboard tube opening according to the determined center coordinates of the outboard tube opening; when the rib position direction of the horizontal frame and the rib position on the outer plate are in the same plane, a measuring point is selected on the measuring line, and the Y-coordinate of the measuring point is measured.

[0013] Further, the angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame is obtained specifically as follows: according to the obtained Y coordinate and Z coordinate values ​​(Y1, Z1) of the center of the outboard tube opening and the Y coordinate and Z coordinate values ​​(Y2, Z2) of the measuring point, the angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame is calculated;

[0014] Specifically:

[0015]

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

[0017] Furthermore, after the opening center of the outboard tube is determined by laser, a circle with a diameter of 25 mm is marked with the laser point as the center, and a hole is opened with a cutter, and the outboard tube is installed and welded and fixed.

[0018] Based on the above technical solution, the present invention has achieved the following technical advantages through practical application of a method for installing a large linear segmented outboard tube:

[0019] 1. The present invention provides a method for installing a large linear segmented outboard tube, which reduces the difficulty of determining the installation position of the outboard tube by using a laser instrument on a horizontal frame, and facilitates the determination and installation of the outboard tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic diagram of measuring point selection in a method for installing a large linear segmented outboard tube.

[0021] Figure 2 The present invention is a schematic diagram of determining the center of an opening of an outboard tube in a method for installing a large linear segmented outboard tube. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific examples 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.

[0023] like Figure 1 and Figure 2 The present invention relates to a method for installing a large linear segmented outboard tube, which specifically comprises the following steps:

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

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

[0026] S3, calculating the angle between the line connecting the measuring point 1 and the center of the outboard tube opening and the horizontal frame 2 according to the selected coordinates of the measuring point 1 and the center coordinates of the outboard tube opening;

[0027] S4, setting a laser instrument 4 at the position of the measuring point 1, setting the irradiation angle of the laser instrument 4 according to the obtained angle, so that the laser instrument 4 irradiates the outer plate 3 where the outboard tube is installed, determining the center position of the opening of the outboard tube, and marking the irradiation position;

[0028] S5, marking and drilling holes at the marked points, and installing the outboard pipes, thereby completing the installation of the outboard pipes on the outer plate 3.

[0029] By determining the installation position of the outboard tube by using the laser instrument 4 on the horizontal frame 2, the difficulty of determining the installation position of the outboard tube is reduced, and the determination and installation of the outboard tube are facilitated.

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

[0031] The method of determining the three-dimensional coordinates of the measuring point 1 on the horizontal frame 2 is specifically as follows: the position of the horizontal frame 2 at the same rib position as the outer plate 3 is determined; based on the determined coordinates of the center of the outboard tube opening, a measuring line is drawn on the horizontal frame 2 that is the same as the X coordinate of the center of the outboard 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, the measuring point 1 is selected on the measuring line, and the Y coordinate of the measuring point 1 is measured.

[0032] The angle between the line connecting the measuring point 1 and the center of the outboard tube opening and the horizontal frame 2 is obtained specifically as follows: according to the obtained Y coordinate and Z coordinate values ​​(Y1, Z1) of the center of the outboard tube opening and the Y coordinate and Z coordinate values ​​(Y2, Z2) of the measuring point 1, the angle between the line connecting the measuring point 1 and the center of the outboard tube opening and the horizontal frame 2 is calculated;

[0033] Specifically:

[0034]

[0035] Wherein, α is the angle between the line connecting the measuring point 1 and the center of the outboard tube opening and the horizontal frame 2.

[0036] After the opening center of the outboard tube is determined by laser, a circle with a diameter of 25 mm is marked with the laser point as the center, and a hole is opened with a cutter, and the outboard tube is installed and welded and fixed.

[0037] Example

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

[0039] ② Find the horizontal frame 2 of the segment, that is, the 4-deck platform, with a height of Z = 10656. At the same time, select a point on the FR31-390 rib. The Y value of the point is calculated to be 11836 (such as Figure 1 ).

[0040] ③ Calculate the angle based on the coordinates of the outboard tube and the coordinates of measuring point 1, (|7044-10656|) / (14265-11836)=tanα, and α is 56.08°.

[0041] ④ According to the calculated angle, adjust the angle of the laser instrument 4 to 56.08°, turn on the laser instrument 4, and the position where the laser irradiates on the outer plate 3 is the center position of the outboard tube opening (such as Figure 2 )

[0042] ⑤ With the laser point as the center, mark a circle of D=125mm, use a cutter to make a hole, install the outboard pipe, weld and grind.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for installing a large linear segmented outboard tube, characterized in that: The method specifically comprises the following steps: S1, determine the installation coordinates of the outboard tube on the outer plate, establish a three-dimensional coordinate system, and determine the center coordinates of the outboard tube opening according to the outboard tube parts drawing; S2, determine the horizontal frame at the same rib position as the outer plate where the outboard tube is installed, select the measuring point on the horizontal frame, and determine the coordinates of the measuring point; S3, calculating the angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame according to the selected measuring point coordinates and the center coordinates of the outboard tube opening; S4, setting a laser instrument at the measuring point, setting the laser instrument irradiation angle according to the obtained angle, making the laser instrument irradiate the outer plate where the outboard tube is installed, determining the center position of the opening of the outboard tube, and marking the irradiation position; S5, mark and drill holes at the marked points, and install the outboard pipe to complete the installation of the outboard pipe on the outer plate.

2. A method for installing a large linear segmented outboard tube according to claim 1, characterized in that: The three-dimensional coordinates established on the outer plate on which the outboard tube is installed are specifically: the rib direction on the outer plate is the X-axis coordinate, the middle longitudinal direction on the outer plate is the Y-axis coordinate, and the vertical direction is the Z-axis coordinate.

3. A method for installing a large linear segmented outboard tube according to claim 2, characterized in that: The method of determining the three-dimensional coordinates of the measuring point on the horizontal frame is specifically as follows: determining the position of the horizontal frame at the same rib position as the outer plate, drawing a measuring line on the horizontal frame that is the same as the X coordinate of the center of the outboard tube opening according to the determined coordinates of the center of the outboard tube opening, when the rib position direction of the horizontal frame and the rib position on the outer plate are in the same plane, selecting a measuring point on the measuring line and measuring the Y coordinate of the measuring point.

4. A method for installing a large linear segmented outboard tube according to claim 3, characterized in that: The angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame is obtained by calculating the angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame according to the obtained Y coordinate and Z coordinate values ​​(Y1, Z1) of the center of the outboard tube opening and the Y coordinate and Z coordinate values ​​(Y2, Z2) of the measuring point; Specifically: Wherein, α is the angle between the line connecting the measuring point and the center of the outboard tube opening and the horizontal frame.

5. The installation method for large linear segmented outboard tubes according to claim 1, characterized in that: After the opening center of the outboard tube is determined by laser, a circle with a diameter of 25 mm is marked with the laser point as the center, and a hole is opened with a cutter, and the outboard tube is installed and welded and fixed.

Images