A method for marking a spherical bulkhead pipe joint allowance

Abstract

The application relates to a spherical bulkhead pipe joint allowance marking method and relates to the field of ship manufacturing.The method comprises the following steps: horizontally arranging a spherical bulkhead on a swing pier, adjusting the spherical bulkhead to be in a horizontal state; marking rib position lines and cross reference lines in the interior of the spherical bulkhead, measuring the height direction allowance of each pipe joint on the spherical bulkhead, and marking sample punches on the rib position lines and the cross reference lines; vertically arranging the spherical bulkhead on the swing pier, adjusting the spherical bulkhead to be in a vertical state; marking the center lines in the horizontal direction of each pipe joint on the exterior of the spherical bulkhead, rotating the spherical bulkhead by 90 degrees along the horizontal center axis of the spherical bulkhead, and marking the center lines in the horizontal direction of each pipe joint on the exterior of the spherical bulkhead; rechecking the marking according to the requirements of a drawing, and completing the marking operation.The marking precision is higher, the operation is simpler, the time is shorter, more manpower is not needed, and the overall quality of the spherical bulkhead and the spherical bulkhead and shaft shell pipe joint welding is improved.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding, and specifically to a method for marking the allowance of spherical bulkhead tube sections. Background Technology

[0002] In the shipbuilding process, due to the high precision requirements for the processing of spherical bulkheads, and the asymmetrical arrangement of the pipe sections on the spherical bulkheads, marking the ends of the spherical bulkheads and the allowance of the pipe sections is not only a key process in on-site processing, but also a persistent processing challenge.

[0003] In existing methods for marking allowances, the template marking method is commonly used. The marking template is typically a circular platform with a steel frame structure. The construction process is as follows: First, mark the center line of the crosshairs and the corresponding position lines of the pipe sections projected onto the platform. Then, place the marking template platform directly above the spherical bulkhead, ensuring that the center line of the crosshairs on the template platform coincides with the center line of the crosshairs on the spherical bulkhead on the assembly platform. A height gauge is then erected on the assembly platform near the spherical bulkhead, and inspection lines are marked. A center punch is then applied. The entire spherical bulkhead marking process takes 3-5 days. During this time, the spherical bulkhead remains suspended on the crane, requiring multiple adjustments to its position, and is highly dependent on the skill level of the on-site construction personnel. Summary of the Invention

[0004] This application provides a method for marking the allowance of spherical bulkhead pipe sections, which can solve the problems of existing allowance marking methods having a long construction period, requiring multiple adjustments during operation, and being highly dependent on the skill level of on-site construction personnel.

[0005] In a first aspect, embodiments of this application provide a method for marking the allowance of a spherical bulkhead tube section, including:

[0006] S1: Arrange the spherical bulkhead horizontally on the swing block and adjust the spherical bulkhead to a horizontal state;

[0007] S2: Draw the rib lines and cross reference lines inside the spherical bulkhead, measure the height margin of each pipe section on the spherical bulkhead, and punch the rib lines and cross reference lines.

[0008] S3: Vertically place the spherical bulkhead on the swing block and adjust the spherical bulkhead to a vertical state;

[0009] S4: Draw the horizontal centerline of each pipe section on the outside of the spherical bulkhead. Rotate the spherical bulkhead 90° along its horizontal central axis and draw the horizontal centerline of each pipe section on the outside of the spherical bulkhead.

[0010] S5: Recheck the marking according to the drawing requirements and complete the marking work.

[0011] In conjunction with the first aspect, in one embodiment, the spherical bulkhead is a hemispherical structure, a front axle housing is installed at the center of the spherical bulkhead, and a first stuffing box housing, a second stuffing box housing, a first cup-shaped tube section, and a second cup-shaped tube section are installed on the side wall of the spherical bulkhead.

[0012] In conjunction with the first aspect, in one embodiment, the step of laterally arranging the spherical bulkhead on the swing pier and adjusting the spherical bulkhead to a horizontal state includes the following specific steps:

[0013] S101: Place the spherical bulkhead horizontally on multiple pre-arranged support blocks, and place multiple jacks evenly along the edge of the spherical bulkhead and rest them on the support blocks.

[0014] S102: Place the laser theodolite in the center below the spherical bulkhead, using the punch mark made during the fabrication of the spherical bulkhead as the positioning reference, and adjust the height of the jacks until the spherical bulkhead is horizontal.

[0015] In conjunction with the first aspect, in one embodiment, the pendulum includes a first pendulum, a second pendulum, and a third pendulum, wherein the first pendulum and the second pendulum are arranged opposite to each other, and the third pendulum is arranged on one side of the line connecting the first pendulum and the second pendulum.

[0016] In conjunction with the first aspect, in one embodiment, the jack includes a first jack, a second jack, and a third jack, wherein the third jack is disposed opposite to the third swing block, the first jack is disposed between the first swing block and the third swing block, and the second jack is disposed between the second swing block and the third swing block.

[0017] In conjunction with the first aspect, in one embodiment, the steps of marking rib lines and crosshair reference lines inside the spherical bulkhead, measuring the height allowance of each pipe section on the spherical bulkhead, and punching center punches on the rib lines and crosshair reference lines include:

[0018] S201: Using the punch mark made when making the spherical bulkhead as a reference, draw the internal rib line and cross reference line inside the spherical bulkhead, and divide the cross reference line into reference line AA' and reference line BB'.

[0019] S202: Recheck the distance between the lower end face of the first stuffing box shell, the second stuffing box shell, the first cup-shaped tube section, the second cup-shaped tube section and the front axle shell and the internal rib line, and measure the allowance in the height direction of each tube section on the spherical bulkhead.

[0020] S203: Punch a center punch on the internal rib line and cross reference line, and draw the external rib line on the outside of the spherical bulkhead according to the punched center punch.

[0021] In conjunction with the first aspect, in one embodiment, the spherical bulkhead is vertically arranged on the swing block, and the spherical bulkhead is adjusted to a vertical state. Specific steps include:

[0022] S301: The spherical bulkhead is placed sideways on the swing block by a crane;

[0023] S302: Hang a plumb bob above the spherical bulkhead and adjust the helical top placed below the spherical bulkhead so that the top and bottom of the plumb bob are at the same distance from the outer rib line.

[0024] In conjunction with the first aspect, in one embodiment, the specific steps of drawing horizontal centerlines for each tube section on the outside of the spherical bulkhead include:

[0025] S401: Place the laser theodolite on the concave side of the spherical bulkhead, align the laser with the baseline point AA' on the concave surface of the spherical bulkhead, and rotate and adjust the spherical bulkhead to make points A and A' horizontal.

[0026] S402: Place the laser theodolite at a preset position on the convex side of the spherical bulkhead;

[0027] S403: Use a laser theodolite to mark the horizontal center lines of the first stuffing box housing, the second stuffing box housing, the first cup-shaped tube section, the second cup-shaped tube section, and the front axle housing;

[0028] S404: Recheck the distance between the centerline of each pipe section and the baseline AA'.

[0029] In conjunction with the first aspect, in one embodiment, the step of rotating the spherical bulkhead 90° along its horizontal central axis and drawing the horizontal centerline of each pipe section on the outside of the spherical bulkhead includes:

[0030] S411: Rotate the spherical bulkhead 90° along its horizontal central axis, place the laser theodolite on one side of the concave surface of the spherical bulkhead, align the laser with the baseline BB' on the concave surface of the spherical bulkhead, and rotate and adjust the spherical bulkhead so that points B and B' are horizontal.

[0031] S412: Place the laser theodolite at a preset position on the convex side of the spherical bulkhead;

[0032] S413: Use a laser theodolite to mark the horizontal centerlines of the first stuffing box housing, the second stuffing box housing, the first cup-shaped tube section, the second cup-shaped tube section, and the front axle housing;

[0033] S414: Recheck the distance between the centerline of each pipe section and the baseline BB'.

[0034] In conjunction with the first aspect, in one implementation method, the specific steps of verifying the marking according to the drawing requirements and completing the marking operation include:

[0035] S501: After the center lines of the first stuffing box housing, the second stuffing box housing, the first cup-shaped tube section, the second cup-shaped tube section, and the front axle housing are all marked, the center lines intersect to form multiple center points;

[0036] S502: Verify the overlap between each center point and the center point of each pipe section according to the drawing requirements;

[0037] S503: Confirm the remaining diameter of the pipe section and complete the marking.

[0038] The beneficial effects of the technical solutions provided in this application include:

[0039] This application utilizes existing construction experience and laser theodolite measurement methods to develop a marking operation process. Compared with the existing template marking method, this method has higher marking accuracy, is simpler to operate, takes less time, and does not require more manpower, which is conducive to improving the overall quality of the spherical bulkhead and the welding of the shaft shell tube sections on the spherical bulkhead. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A flowchart illustrating a method for marking the allowance of a spherical bulkhead tube section, provided for an embodiment of this application;

[0042] Figure 2 A schematic diagram of a spherical bulkhead arranged laterally;

[0043] Figure 3 A top view of the structure with the spherical bulkhead arranged laterally;

[0044] Figure 4 A schematic diagram showing the layout of points along the crosshair baseline;

[0045] Figure 5 A schematic diagram of the vertical arrangement of the spherical bulkhead;

[0046] Figure 6 This is a schematic diagram showing the arrangement of a laser theodolite placed on one side of the concave surface of the spherical cabin wall;

[0047] Figure 7 This is a schematic diagram showing the arrangement of a laser theodolite placed on one side of the convex surface of a spherical cabin wall;

[0048] Figure 8 This is a schematic diagram of the baseline AA' and the center lines of each pipe section;

[0049] Figure 9 This is a schematic diagram showing the baseline BB' and the center lines of each pipe section;

[0050] Figure 10 A schematic diagram after the crosshairs have been marked on each pipe section;

[0051] In the diagram: 1. Spherical bulkhead; 2. Swing block; 3. Cross baseline; 4. Front axle housing; 5. First stuffing box housing; 6. Second stuffing box housing; 7. First cup-shaped tube section; 8. Second cup-shaped tube section; 9. Jack; 10. Support block; 11. Internal rib line; 12. External rib line; 13. Plumb bob; 14. Laser theodolite; 201. First swing block; 202. Second swing block; 203. Third swing block; 901. First jack; 902. Second jack; 903. Third jack. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0053] This application provides a method for marking the allowance of spherical bulkhead pipe sections, which can solve the problems of existing allowance marking methods having a long construction period, requiring multiple adjustments during operation, and being highly dependent on the skill level of on-site construction personnel.

[0054] See Figure 1 As shown, this application provides a method for scribing the allowance of a spherical bulkhead tube section, including:

[0055] S1: Arrange the spherical bulkhead 1 horizontally on the swing block 2, and adjust the spherical bulkhead 1 to a horizontal state;

[0056] S2: Draw the rib lines and cross reference lines 3 inside the spherical bulkhead 1, measure the height margin of each pipe section on the spherical bulkhead 1, and punch the rib lines and cross reference lines 3.

[0057] S3: Vertically place the spherical bulkhead 1 on the swing block 2 and adjust the spherical bulkhead 1 to a vertical state;

[0058] S4: Draw the horizontal centerline of each pipe section on the outside of the spherical bulkhead 1. Rotate the spherical bulkhead 1 90° along its horizontal central axis and draw the horizontal centerline of each pipe section on the outside of the spherical bulkhead 1.

[0059] S5: Recheck the marking according to the drawing requirements and complete the marking work.

[0060] In step S1, the spherical bulkhead 1 is arranged laterally and leveled to facilitate subsequent scribing operations inside the spherical bulkhead, thereby reducing errors in the measurement and scribing of the various components of the spherical bulkhead 1.

[0061] In step S2, rib lines and cross reference lines 3 are drawn inside the spherical bulkhead 1 to facilitate the calculation of the distance between the lower end face of each component of the spherical bulkhead 1 and the rib lines. At the same time, by punching a center punch on the rib lines and cross reference lines 3, the operator can quickly draw the rib lines and cross reference lines 3 on the outside of the spherical bulkhead 1 according to the punched center punch.

[0062] In step S3, the spherical bulkhead 1 is arranged vertically and adjusted to be vertical, which facilitates the subsequent scribing operation on the outside of the spherical bulkhead and reduces the errors generated by the various components of the spherical bulkhead 1 during measurement and scribing.

[0063] In step S4, the center lines of each tube section in the horizontal direction are drawn twice on the outside of the spherical bulkhead 1. Finally, a cross center line can be drawn in the middle of each tube section to form a center point in the middle of each tube section.

[0064] In step S5, according to the drawings, the coincidence of the center point marked in the middle of the pipe section with the center point of the pipe section itself is checked to verify the accuracy of this marking operation.

[0065] As an optional embodiment, see [link to example]. Figure 2 and Figure 3 As shown, the spherical bulkhead 1 is a hemispherical structure. The front axle housing 4 is installed at the center of the spherical bulkhead 1. The first stuffing box housing 5, the second stuffing box housing 6, the first cup-shaped pipe section 7, and the second cup-shaped pipe section 8 are installed on the side wall of the spherical bulkhead 1.

[0066] As an optional embodiment, see [link to example]. Figure 2 and Figure 3 As shown, the spherical bulkhead 1 is arranged laterally on the swing block 2, and the spherical bulkhead 1 is adjusted to a horizontal state. The specific steps include:

[0067] S101: Place the spherical bulkhead 1 horizontally on the pre-arranged multiple piers 2, and place multiple jacks 9 evenly along the edge of the spherical bulkhead 1 and rest them on the support piers 10.

[0068] S102: Place the laser theodolite 14 in the center below the spherical bulkhead 1, and use the punch made when making the spherical bulkhead 1 as the positioning reference. Adjust the height of the jack 9 until the spherical bulkhead 1 is horizontal.

[0069] In step S101, according to the design drawings, multiple swing blocks 2 and jacks 9 are first arranged. Then, the spherical bulkhead 1 is lifted by a crane and arranged horizontally on multiple swing blocks 2. The jacks 9 are aligned with the edge of the spherical bulkhead 1 to facilitate the adjustment of the height of the spherical bulkhead 1.

[0070] In step S102, the laser theodolite 14 is placed in the center below the spherical bulkhead 1. The height of the laser theodolite 14 is adjusted so that the laser beam of the laser theodolite 14 is roughly aligned with the punch used to make the spherical bulkhead 1. By observing the laser beam projected onto the inner wall of the spherical bulkhead 1, the height of the jack 9 lifting the spherical bulkhead 1 is adjusted so that the spherical bulkhead 1 remains horizontal.

[0071] As an optional embodiment, see [link to example]. Figure 2 and Figure 3 As shown, the swing block 2 includes a first swing block 201, a second swing block 202, and a third swing block 203. The first swing block 201 and the second swing block 202 are arranged opposite each other, and the third swing block 203 is located on one side of the line connecting the first swing block 201 and the second swing block 202. The first swing block 201, the second swing block 202, and the third swing block 203 serve to support the spherical bulkhead 1, and sufficient gaps are reserved between the three swing blocks 2, which not only allows for the stable erection of the spherical bulkhead 1 but also provides space for the installation of the jacks 9.

[0072] As an optional embodiment, see [link to example]. Figure 2 and Figure 3 As shown, the jack 9 includes a first jack 901, a second jack 902, and a third jack 903. The third jack 903 is positioned opposite the third swing block 203. The first jack 901 is positioned between the first swing block 201 and the third swing block 203, and the second jack 902 is positioned between the second swing block 202 and the third swing block 203. Each jack 9 has a support block 10 at its bottom to facilitate the jack 9 in lifting the spherical bulkhead 1. The first jack 901, the second jack 902, and the third jack 903 can adjust the height of the spherical bulkhead 1 from three directions, allowing for more precise adjustment of the height of the spherical bulkhead 1 according to the instructions of the laser theodolite 14.

[0073] As an optional embodiment, see [link to example]. Figure 2 , Figure 3 and Figure 4 As shown, rib lines and cross reference lines 3 are drawn inside the spherical bulkhead 1. The height allowance of each pipe section on the spherical bulkhead 1 is measured, and a center punch is made on the rib lines and cross reference lines 3. The specific steps include:

[0074] S201: Using the punch mark made when making the spherical bulkhead 1 as a reference, draw the internal rib line 11 and cross reference line 3 inside the spherical bulkhead 1, and divide the cross reference line 3 into reference line AA' and reference line BB'.

[0075] S202: Recheck the distance between the lower end face of the first stuffing box shell 5, the second stuffing box shell 6, the first cup-shaped tube section 7, the second cup-shaped tube section 8 and the front axle shell 4 and the internal rib line 11, and measure the margin in the height direction of each tube section on the spherical bulkhead 1.

[0076] S203: Punch a center punch on the internal rib line 11 and the cross reference line 3, and draw the external rib line 12 on the outside of the spherical bulkhead 1 according to the punched center punch.

[0077] In step S201, the internal rib line 11 serves as the measurement reference line for each pipe section set on the spherical bulkhead 1. The reference line AA' and the reference line BB' of the cross reference line 3 are perpendicular to each other, so that when rotating the spherical bulkhead 1, the reference line AA' and the reference line BB' can be used as the standard to determine that there is no error in the rotation angle.

[0078] In step S202, using the internal rib line 11 as the measurement reference line, the distance between the lower end face of the first stuffing box housing 5, the second stuffing box housing 6, the first cup-shaped pipe section 7, the second cup-shaped pipe section 8 and the front axle housing 4 and the internal rib line 11 in the vertical direction is measured. By referring to the construction design drawing, the allowance of each pipe section in the height direction is determined and the data is collected.

[0079] In step S203, by punching a center punch on the internal rib line 11, the reference line AA' and the reference line BB', the operator can accurately draw the external rib line 12, the reference line AA' and the reference line BB' on the outer wall of the spherical bulkhead 1 according to the punched center punch, ensuring that there is no deviation from the internal rib line 11, the reference line AA' and the reference line BB' inside the spherical bulkhead 1.

[0080] As an optional embodiment, see [link to example]. Figure 5 As shown, the spherical bulkhead 1 is vertically arranged on the swing block 2, and the spherical bulkhead 1 is adjusted to a vertical state. The specific steps include:

[0081] S301: The spherical bulkhead 1 is placed sideways on the swing block 2 by means of a crane;

[0082] S302: Hang a plumb bob 13 above the spherical bulkhead 1, and adjust the spiral top placed below the spherical bulkhead 1 so that the top and bottom ends of the plumb bob 13 are at the same distance from the outer rib line 12.

[0083] In step S301, a screw jack is installed on the top of the first swing block 201, and a crane mechanism is used to lift the spherical bulkhead 1 and place the spherical bulkhead 1 on the first swing block 201. The screw jack can be used to adjust the tilt angle of the spherical bulkhead 1.

[0084] In step S302, a plumb bob 13 is lowered above the spherical bulkhead 1. The tilt angle of the spherical bulkhead 1 is adjusted by adjusting the spiral top placed below the spherical bulkhead 1. Since the plumb bob 13 is always vertical when it hangs down naturally, the tilt angle of the spherical bulkhead 1 can be adjusted. When the outer rib line of the spherical bulkhead 1 is parallel to the vertical line of the plumb bob 13, that is, when the top and bottom ends of the plumb bob 13 are at the same distance from the outer rib line 12, the spherical bulkhead 1 reaches the vertical state.

[0085] As an optional embodiment, see [link to example]. Figure 6 , Figure 7 and Figure 8 As shown, the center lines in the horizontal direction of each tube section are drawn on the outside of the spherical bulkhead 1. The specific steps include:

[0086] S401: Place the laser theodolite 14 on one side of the concave surface of the spherical bulkhead 1, align the laser with the reference line AA' on the concave surface of the spherical bulkhead 1, and rotate and adjust the spherical bulkhead 1 so that points A and A' are horizontal.

[0087] S402: Place the laser theodolite 14 at a preset position on the convex side of the spherical bulkhead 1;

[0088] S403: Use a laser theodolite 14 to mark the horizontal center lines of the first stuffing box housing 5, the second stuffing box housing 6, the first cup-shaped tube section 7, the second cup-shaped tube section 8, and the front axle housing 4.

[0089] S404: Recheck the distance between the centerline of each pipe section and the baseline AA'.

[0090] In step S401, the laser theodolite 14 is placed on one side of the concave surface of the spherical bulkhead 1. The laser emitted by the laser theodolite 14 is adjusted to be horizontal. The laser is roughly aligned with points A and A' at both ends of the baseline AA' on the concave surface of the spherical bulkhead 1. With the horizontal central axis of the spherical bulkhead 1 as the center, the spherical bulkhead is slowly rotated so that the baseline AA' is completely aligned with the laser. At this time, the baseline AA' inside the spherical bulkhead 1 remains horizontal, and the baseline AA' outside the spherical bulkhead 1 also remains horizontal.

[0091] In step S402, the laser theodolite 14 is placed at a predetermined engineering position on the convex side of the spherical bulkhead 1 so that the laser emitted by the laser theodolite 14 can irradiate each pipe section.

[0092] In step S403, the laser emitted by the laser theodolite 14 is aimed at each section of the spherical bulkhead 1, and the center line in the horizontal direction of each section is drawn on the surface of each section according to the laser indication.

[0093] In step S404, after marking the center lines of each pipe section, the distance between the center line of each pipe section and the baseline AA' is measured and compared with the design distance on the design drawings to verify the accuracy of the installation.

[0094] As an optional embodiment, see [link to example]. Figure 6 , Figure 7 and Figure 9 Rotate the spherical bulkhead 1 90° along its horizontal central axis, and draw the horizontal center lines of each pipe section on the outside of the spherical bulkhead 1. The specific steps include:

[0095] S411: Rotate the spherical bulkhead 1 90° along its horizontal central axis, place the laser theodolite 14 on one side of the concave surface of the spherical bulkhead 1, align the laser with the reference line BB' on the concave surface of the spherical bulkhead 1, and rotate and adjust the spherical bulkhead 1 so that points B and B' are horizontal.

[0096] S412: Place the laser theodolite 14 at a preset position on the convex side of the spherical bulkhead 1;

[0097] S413: Use a laser theodolite 14 to mark the horizontal center lines of the first stuffing box housing 5, the second stuffing box housing 6, the first cup-shaped tube section 7, the second cup-shaped tube section 8, and the front axle housing 4.

[0098] S414: Recheck the distance between the centerline of each pipe section and the baseline BB'.

[0099] In step S411, the spherical bulkhead 1 is rotated 90° along its horizontal central axis. The laser theodolite 14 is placed on one side of the concave surface of the spherical bulkhead 1. The laser emitted by the laser theodolite 14 is adjusted to be horizontal. The laser is roughly aligned with points B and B' at both ends of the reference line BB' on the concave surface of the spherical bulkhead 1. With the horizontal central axis of the spherical bulkhead 1 as the center, the spherical bulkhead is slowly rotated so that the reference line BB' is completely aligned with the laser. At this time, the reference line BB' inside the spherical bulkhead 1 remains horizontal, and the reference line BB' outside the spherical bulkhead 1 also remains horizontal.

[0100] In step S412, the laser theodolite 14 is placed at a predetermined engineering position on the convex side of the spherical bulkhead 1 so that the laser emitted by the laser theodolite 14 can irradiate each pipe section.

[0101] In step S413, the laser emitted by the laser theodolite 14 is aimed at each section of the spherical bulkhead 1, and the center line in the horizontal direction of each section is drawn on the surface of each section according to the laser indication.

[0102] In step S414, after marking the center lines of each pipe section, the distance between the center line of each pipe section and the baseline BB' is measured and compared with the design distance on the design drawings to reconfirm the accuracy of the installation.

[0103] As an optional embodiment, see [link to example]. Figure 10 As shown, verify the marking according to the drawing requirements and complete the marking work. The specific steps include:

[0104] S501: After the center lines of the first stuffing box housing 5, the second stuffing box housing 6, the first cup-shaped tube section 7, the second cup-shaped tube section 8 and the front axle housing 4 are all marked, the center lines intersect to form multiple center points;

[0105] S502: Verify the overlap between each center point and the center point of each pipe section according to the drawing requirements;

[0106] S503: Confirm the remaining diameter of the pipe section and complete the marking.

[0107] In step S501, since two center lines are engraved on the surface of each pipe section, the two center lines intersect each other, forming multiple engraved center points at the center of the pipe section. The engraved center points are the center points obtained in the actual measurement of the pipe section.

[0108] In step S502, the center point of the sculpted part is compared with the center point of the pipe section itself marked during the manufacturing process. By detecting the deviation between the center point of the sculpted part of the pipe section and its own center point, the manufacturing of the spherical bulkhead 1 and each pipe section is indirectly detected to ensure that the manufacturing of each pipe section meets the design standards of the drawings.

[0109] In step S503, after the verification and inspection are completed, the remaining amount of the inner hole of the pipe section is confirmed again to complete the overall scribing operation.

[0110] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0111] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0112] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for scribing the allowance of spherical bulkhead pipe sections, characterized in that, include: Arrange the spherical bulkhead (1) horizontally on the swing block (2) and adjust the spherical bulkhead (1) to a horizontal state; Draw rib lines and cross reference lines (3) inside the spherical bulkhead (1), measure the height margin of each pipe section on the spherical bulkhead (1), and punch a sample punch on the rib lines and cross reference lines (3); The spherical bulkhead (1) is vertically arranged on the swing block (2), and the spherical bulkhead (1) is adjusted to a vertical state; Draw the horizontal centerline of each pipe section on the outside of the spherical bulkhead (1). Rotate the spherical bulkhead (1) 90° along its horizontal central axis and draw the horizontal centerline of each pipe section on the outside of the spherical bulkhead (1). Recheck the marking according to the drawing requirements and complete the marking work.

2. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 1, characterized in that: The spherical bulkhead (1) is a hemispherical structure. A front axle housing (4) is installed at the center of the spherical bulkhead (1). A first stuffing box housing (5), a second stuffing box housing (6), a first cup-shaped pipe section (7), and a second cup-shaped pipe section (8) are installed on the side wall of the spherical bulkhead (1).

3. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 2, characterized in that, The specific steps for arranging the spherical bulkhead (1) laterally on the swing block (2) and adjusting the spherical bulkhead (1) to a horizontal state include: Place the spherical bulkhead (1) horizontally on multiple pre-arranged piers (2), and place multiple jacks (9) evenly along the edge of the spherical bulkhead (1) and rest them on the support piers (10); Place the laser theodolite (14) in the center below the spherical bulkhead (1), and use the punch made when making the spherical bulkhead (1) as the positioning reference. Adjust the height of the jack (9) until the spherical bulkhead (1) is horizontal.

4. The method for marking the allowance of a spherical bulkhead tube section as described in claim 3, characterized in that: The pendulum (2) includes a first pendulum (201), a second pendulum (202) and a third pendulum (203). The first pendulum (201) and the second pendulum (202) are arranged opposite to each other, and the third pendulum (203) is arranged on one side of the line connecting the first pendulum (201) and the second pendulum (202).

5. The method for marking the allowance of a spherical bulkhead tube section as described in claim 4, characterized in that: The jack (9) includes a first jack (901), a second jack (902) and a third jack (903), wherein the third jack (903) is disposed opposite to the third swing block (203), the first jack (901) is disposed between the first swing block (201) and the third swing block (203), and the second jack (902) is disposed between the second swing block (202) and the third swing block (203).

6. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 2, characterized in that, The steps include: marking rib lines and cross reference lines (3) inside the spherical bulkhead (1), measuring the height margin of each pipe section on the spherical bulkhead (1), and punching a center punch on the rib lines and cross reference lines (3). Using the punch made when making the spherical bulkhead (1) as a reference, draw the internal rib line (11) and cross reference line (3) inside the spherical bulkhead (1), and divide the cross reference line (3) into reference line AA' and reference line BB'. Recheck the distance between the lower end face of the first stuffing box shell (5), the second stuffing box shell (6), the first cup-shaped tube section (7), the second cup-shaped tube section (8) and the front axle shell (4) and the internal rib line (11), and measure the margin in the height direction of each tube section on the spherical bulkhead (1). Punch a punch on the inner rib line (11) and the cross reference line (3), and draw the outer rib line (12) on the outside of the spherical bulkhead (1) according to the punched punch.

7. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 2, characterized in that, The specific steps for vertically arranging the spherical bulkhead (1) on the swing block (2) and adjusting the spherical bulkhead (1) to a vertical state include: The spherical bulkhead (1) is placed sideways on the swing block (2) by the crane; A plumb bob (13) is hung above the spherical bulkhead (1), and the spiral top placed below the spherical bulkhead (1) is adjusted so that the top and bottom of the plumb bob (13) are at the same distance from the outer rib line (12).

8. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 6, characterized in that, The specific steps for drawing the horizontal centerline of each tube section on the outside of the spherical bulkhead (1) include: Place the laser theodolite (14) on one side of the concave surface of the spherical bulkhead (1), align the laser with the baseline AA' point on the concave surface of the spherical bulkhead (1), and rotate and adjust the spherical bulkhead (1) to make points A and A' horizontal; Place the laser theodolite (14) at a predetermined position on the convex side of the spherical bulkhead (1); The center lines of the first stuffing box housing (5), the second stuffing box housing (6), the first cup-shaped tube section (7), the second cup-shaped tube section (8) and the front axle housing (4) were drawn with the assistance of a laser theodolite (14); Recheck the distance between the centerline of each pipe section and the baseline AA'.

9. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 8, characterized in that, The steps of rotating the spherical bulkhead (1) 90° along its horizontal central axis and drawing the horizontal center lines of each pipe section on the outside of the spherical bulkhead (1) include: Rotate the spherical bulkhead (1) 90° along its horizontal central axis, place the laser theodolite (14) on the concave side of the spherical bulkhead (1), align the laser with the baseline BB' of the concave side of the spherical bulkhead (1), and rotate and adjust the spherical bulkhead (1) so that points B and B' are horizontal; Place the laser theodolite (14) at a predetermined position on the convex side of the spherical bulkhead (1); The center lines of the first stuffing box housing (5), the second stuffing box housing (6), the first cup-shaped tube section (7), the second cup-shaped tube section (8) and the front axle housing (4) were drawn with the assistance of a laser theodolite (14); Recheck the distance between the centerline of each pipe section and the baseline BB'.

10. The method for scribing the allowance of a spherical bulkhead tube section as described in claim 9, characterized in that, The specific steps for verifying and completing the marking work according to the drawing requirements include: After the center lines of the first stuffing box housing (5), the second stuffing box housing (6), the first cup-shaped tube section (7), the second cup-shaped tube section (8) and the front axle housing (4) are all marked, the center lines intersect to form multiple center points; Recheck the alignment of each center point with the center point of each pipe section according to the drawing requirements; Confirm the remaining diameter of the pipe section and complete the marking.

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