Control method for realizing zero-allowance hoisting of ship anchor platform

Abstract

The invention provides a control method for realizing zero-allowance hoisting of a ship anchor platform. The control method specifically comprises the following steps: S1, manufacturing an anchor platform building jig frame according to a drawing; s2, performing data state conversion on the theoretical coordinates of the upper opening of the anchor platform wrapper sheet and the theoretical coordinates of the corner joint position of the lower opening of the anchor platform wrapper sheet and the anchor mouth panel; s3, manufacturing a ground wire reference on an anchor platform construction site; s4, building an anchor platform; s5, acquiring linear data of the corner joint position of the hull outer plate and the anchor chock, and finding points of a net line of a hawse pipe and an anchor chock wrapper sheet; s6, according to the net line, the anchor platform wrapping plate and the anchor chain pipe allowance are cut; and S7, after allowance cutting, the anchor table is hung. According to the control method for achieving no-allowance hoisting of the ship anchor platform, the time for repairing and cutting the allowance of the upper opening of the wrapping plate of the anchor platform at high altitude is shortened, the using time of a crane is shortened, and meanwhile the risk of high-altitude operation is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a control method for realizing the lifting of a ship anchor platform without any margin. Background Art

[0002] The anchor platform is a convex structure set at the outlet of the anchor chain barrel on the hull plate of a ship with a fuller bow or a bulbous bow to prevent the anchor from hitting the hull plate when the ship is anchored. Its function is to extend the outlet of the anchor chain barrel to a certain position outside the hull to ensure that the anchor claw does not touch the hull plate when the hull is tilted 5 degrees. Because the anchor platform is set outside the hull plate, and the hull plate is a hyperbolic line, the contact position between the upper edge of the anchor platform plate and the hull plate is also a hyperbolic line. Since the lines of the hull outer plate and the anchor platform will have certain deviations from the theoretical model during the construction process, when the anchor platform is assembled with the hull, in order to ensure the size of the anchor platform and to ensure that the anchor platform package is completely in line with the hull line, a margin of about 100mm is usually added to the upper edge of the anchor platform package. Under normal circumstances, this margin is trimmed according to the actual situation when the anchor platform is hoisted onto the hull for assembly, and it takes multiple trimmings to be fully in place. Because the margin needs to be trimmed multiple times (and it is an aerial operation), it causes an increase in labor hours, an increase in crane hoisting time, and an increase in the risk of aerial operations. Therefore, in order to reduce the trimming time and hoisting time during the anchor platform hoisting stage and reduce the risk of aerial operations, a method for hoisting the ship anchor platform without margin is needed to solve the above problems. Summary of the invention

[0003] In view of the above problems, the present invention provides a control method for realizing the hoisting of a ship anchor without any excess, so as to reduce the trimming time and hoisting time during the hoisting stage of the anchor and reduce the risk of high-altitude operations.

[0004] To achieve the above object, the present invention adopts the following technical solution: A control method for realizing the lifting of a ship anchor platform without excess, specifically comprising the following steps: S1. Make anchor platform and build tire frame according to the drawings; S2. Data state conversion of theoretical coordinates of the upper edge of the anchor plate and the angle joint position between the lower edge of the anchor plate and the anchor lip panel; S3. Preparation of ground line benchmark at anchor platform construction site; S4. Anchor platform construction; S5. Linear data collection of the angle joint position between the hull outer plate and the anchor platform, and net line point finding of the anchor chain tube and the anchor platform cover plate; S6. Cut the anchor base plate and anchor chain pipe surplus according to the net line; S7. After the excess is cut, the anchor platform is hoisted.

[0005] Furthermore, S2 specifically converts the theoretical coordinates of the upper edge of the anchor plate wrapping and the theoretical coordinates of the corner joint position between the lower edge of the anchor plate wrapping and the anchor lip panel into the anchor plate manufacturing site status coordinates using a three-point conversion program with the center of the anchor lip panel as the zero point and the major axis of the anchor lip ellipse as the reference axis.

[0006] Further, the S3 is as follows: in the stage of placing the anchor lip on the tire, the anchor lip is positioned in the tire frame according to the cross ground line of the tire frame. After the anchor lip panel is installed, the cross ground line of the tire frame is reversed to the anchor lip panel. Then, a total station is used to determine the axis with the center of the elliptic circle of the anchor lip panel as the zero point and the major axis of the elliptic circle of the anchor lip panel as the reference. The direction of the axis determined by the total station is consistent with the direction of the three-point conversion of the coordinates in S2. Four reference points are made and marked on the ground within a range of 0.5m-2m from the edge of the anchor platform tire frame, and the coordinate data of the reference points are recorded. Furthermore, S4 is specifically as follows: after the ground wire benchmark at the anchor platform construction site is completed, an anchor platform plate iron sample box is made based on the anchor lip panel and the anchor platform frame. During the anchor platform plate curve processing stage, the iron sample box is used to verify the plate line shape to ensure that the anchor platform plate line shape is consistent with the anchor platform iron sample box line shape. After the anchor platform plate line shape is processed in place, the frame is put into construction.

[0007] Furthermore, the S5 specifically includes the following steps: S51. After the hull structure is completed, a total station is used to make a ground line based on the section where the anchor is located, and the line data of the corner joint position between the anchor package plate and the hull outer plate is collected based on the ground line. The center point of the anchor chain pipe insertion and installation position on the hull outer plate and the position of the sixteen equally divided points when the anchor is installed are determined, and the actual measured numerical coordinates of the sixteen equally divided points are recorded for backup. Then, an ellipse of the anchor chain pipe on the outer plate is drawn according to the center point and the drawing data, and 100mm inspection lines of the ellipse and the sixteen equally divided points are drawn at the same time. Then, a hole is opened on the ellipse of the anchor chain pipe insertion position on the hull outer plate, and the anchor chain pipe is inserted. After the anchor chain pipe is inserted and installed, the total station is used to find the net line point of the anchor chain pipe based on the ground line and draw the net line and 100mm inspection line; S52. After the construction of the anchor platform is completed, use the total station to find the net line points of the anchor platform package plate based on the four reference points made on the ground in S3. These net line points are also the points that need to be matched with the sixteen equally divided points on the outer plate of the anchor platform installation position in the later stage. After the net line points are found, connect the points to draw the net line, and make a 100mm inspection line for the net line.

[0008] Furthermore, in said S52, when finding the net line point on the anchor base plate, it is necessary to consider the line data of the sixteen equally divided points of the hull outer plate at the angle joint with the anchor base. If the outer plate line type of the anchor base installation position on the segment is detected by the total station with the ground line reference described in S51, and compared with the theoretical coordinates of the hull outer plate at this point, and the detected data is larger than the theoretical data, that is, the outer plate line type is larger, then the anchor base plate margin is cut off to remove the excess part of the outer plate. If the outer plate line type is smaller, a small part is reserved for the anchor base plate margin to ensure that the size of the anchor base plate fits the outer plate line type to the greatest extent.

[0009] Furthermore, S6 is specifically as follows: prepare a cutting knife, and cut the upper margin of the anchor base plate and the lower margin of the anchor chain pipe according to the net line made in S5. During the cutting process, refer to the 100mm inspection line to ensure that the distance between the cutting position and the 100 inspection line is always maintained at 100mm to ensure the accuracy after cutting.

[0010] Further, S7 is specifically as follows: after the upper margin of the anchor platform wrapping plate and the lower margin of the anchor chain pipe are cut, the anchor platform is hoisted by a crane. When hoisting, attention should be paid to the accurate alignment of the sixteen equally divided points on the anchor platform wrapping plate with the equally divided points on the hull outer plate to ensure the installation accuracy of the anchor platform. At the same time, attention should be paid to the corner joint gap between the anchor platform wrapping plate and the hull outer plate. If the joint gap between the anchor platform wrapping plate and the hull outer plate exceeds 5mm, that is, the local gap exceeds the standard, the upper edge of the anchor platform wrapping plate should be partially trimmed to ensure the overall gap of the anchor platform.

[0011] First of all, the hull outer plate at the position where the anchor platform is installed on the hull is a curved outer plate, which has a large curvature and line shape, and during the stage of hull segment construction, the outer plate line shape will have a certain deviation from the design model. In addition, the position where the upper mouth of the anchor platform package is corner-joined with the hull outer plate is not in the same plane, but is the same as the line shape of the hull outer plate, and has a large curvature and line shape. Due to the deviation in the construction of the anchor platform and the deviation in the line shape of the outer plate during the construction stage of the hull, the construction personnel cannot control the actual deviation, so it is impossible to ensure the installation size when the anchor platform is installed on the hull while ensuring the tight fit of the corner joint gap. Therefore, it is necessary to increase the upper mouth of the anchor platform package plate by about 100mm in the design stage to facilitate the trimming according to the situation when the anchor platform is installed on the hull later, so as to ensure the size of the anchor platform while ensuring that the corner joint gap between the anchor platform package plate and the outer plate meets the welding requirements.

[0012] In the present invention, during the stage of hull segment construction, a total station is used to make a ground line reference with the segment as the reference, and then the total station is used to find the sixteen equally divided points and the center point on the outer plate until the corner connection with the anchor platform with the ground line as the reference, and the actual measured coordinate values ​​of these points are recorded. After the sixteen equally divided points and the center point are found, holes are opened on the outer plate and the anchor chain pipe is inserted. After the anchor chain pipe is installed, the total station is used to find the net line point of the anchor chain pipe with the ground line as the reference, and the line is drawn and cut; by using three-point conversion software, the hull coordinates on the anchor platform are converted into the coordinates of the anchor platform tire construction state, and the ground line reference is made with the center of the anchor platform panel as the reference point during the anchor platform construction stage, so that it is convenient to use the total station to find the net line point of the anchor platform package plate, draw lines, and cut the margin after the anchor platform construction is completed.

[0013] Therefore, only by adopting the technical solution of the present invention can the actual data of the outer plate line shape at the installation position of the anchor platform on the hull, the actual data of the net line position of the anchor chain pipe, and the net line position data of the upper edge of the package plate in the completion stage of the anchor platform construction be mastered, so that the lines can be accurately drawn and the excess can be accurately cut off before hoisting.

[0014] The control method for realizing the hoisting of the ship anchor platform without excess described in the present invention reduces the time for cutting the excess of the upper edge of the anchor platform package plate at high altitude, reduces the use time of the crane, and reduces the risk of high-altitude operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The theoretical coordinates of the upper end of the anchor platform package plate of the present invention have been converted into a coordinate schematic diagram of the on-site tire mounting state; Figure 2 It is a schematic diagram of the coordinates of the corner joint position between the lower opening of the anchor platform cover plate and the anchor lip panel of the present invention converted into the on-site tire mounting state; Figure 3 It is a schematic diagram of a method for making four reference points on the ground around the anchor platform tire frame according to the present invention; Figure 4 It is a schematic diagram of actual coordinate data of four reference points made on the ground around the anchor platform cradle of a certain ship described in the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] A control method for realizing the lifting of a ship anchor platform without excess, specifically comprising the following steps: S1. Make anchor platform and build tire frame according to the drawings; S2. Theoretical coordinates of the upper edge of the anchor plate and the angle joint position between the lower edge of the anchor plate and the anchor lip panel are converted into state data: The theoretical coordinates of the upper end of the anchor plate and the theoretical coordinates of the corner joint between the lower end of the anchor plate and the anchor lip panel are converted into the on-site state coordinates using a three-point conversion program with the center of the anchor lip panel as the zero point and the major axis of the anchor lip ellipse as the reference axis (see Figure 1 , 2 ); S3. Anchor base production site ground wire benchmark production During the anchor lip tire installation stage, the anchor lip is positioned in the tire frame according to the tire frame cross ground line. After the anchor lip panel is installed, the tire frame cross ground line is reversed to the anchor lip panel. Then the total station is used to determine the axis with the center of the anchor lip panel ellipse as the zero point and the major axis of the anchor lip panel ellipse as the reference. The axis direction measured by the total station is consistent with the direction when the coordinate three points in S2 are converted. Four reference points are made and marked on the ground within 0.5m-2m from the edge of the anchor platform tire frame, and the coordinate data of the reference points are recorded.

[0018] During the stage of anchor lip tire installation, the anchor lip is positioned in the tire frame according to the tire frame cross ground line. After the anchor lip panel is installed, the tire frame cross ground line is reversed to the anchor lip panel. The total station is used to take the center of the anchor lip ellipse as the zero point and the major axis of the anchor lip ellipse as the reference axis. The axis direction measured by the total station is consistent with the direction of the three-point conversion of the same coordinate in S2. Four reference points are made on the ground within 0.5m-2m from the edge of the anchor platform tire frame (see the method for details). Figure 3 ) and mark, and record the coordinate data of the reference point (see Figure 4 ); S4. Anchor platform construction After the benchmark is completed, the anchor lip panel and the anchor platform frame are used as the benchmark to make the anchor platform plate iron sample box. During the anchor platform plate curve processing stage, the plate line shape is checked with the iron sample box to ensure that the anchor platform plate line shape is consistent with the iron sample box line shape. After the anchor platform plate line shape is processed in place, the frame is put on for construction; S5. Linear data collection of the angle joint position between the hull outer plate and the anchor platform, and point finding of the net line of the anchor chain tube and the anchor platform package plate S51. After the hull structure is completed, use the total station to make a ground line based on the section where the anchor is located, and use the ground line as a reference to collect the linear data of the corner joint position between the hull outer plate and the anchor plate, and determine the center point of the anchor chain pipe insertion and installation position on the outer plate and the position of the sixteen equally divided points when the anchor is installed. Then, draw an ellipse of the anchor chain pipe on the hull outer plate based on the center point and the drawing data, and draw the 100mm inspection line of the ellipse and the sixteen equally divided points at the same time. Then, make a hole in the ellipse of the anchor chain pipe insertion position on the hull outer plate and insert the anchor chain pipe. After the anchor chain pipe is inserted and installed, use the total station to find the net line point of the anchor chain pipe based on the ground line and draw the net line (cutting line) and 100mm inspection line. S52. After the construction of the anchor platform is completed, the net line point on the anchor platform package is found by using the total station with the four reference points made on the ground in S3 as the reference. When finding the net line point on the anchor platform package, the linear data of the sixteen-equal points of the hull outer plate at the angle connection position with the anchor platform should be considered. If the outer plate linear type of the anchor platform installation position on the segment is detected by the total station with the ground line reference described in S51, and compared with the theoretical coordinates of the hull outer plate at this point, the detected data is larger than the theoretical data, that is, the outer plate linear type is larger, then the anchor platform package margin is cut off from the excess part of the outer plate. If the outer plate linear type is smaller, a small part is reserved for the anchor platform package margin to ensure that the size of the anchor platform package fits the outer plate linear type to the greatest extent. ; After the net line point is found, connect the points to draw a net line, and make a 100mm inspection line for the net line; S6. Cut the anchor platform package and anchor chain pipe margin according to the net line Prepare the cutting knife, and cut the upper margin of the anchor platform package and the lower margin of the anchor chain pipe according to the net line made in the early stage. Refer to the 100mm inspection line during the cutting process to ensure that the distance between the cutting position and the 100 inspection line is always kept at 100mm to ensure the accuracy after cutting; S7. After the excess is cut, the anchor platform is hoisted After the margins of the upper end of the anchor platform package and the lower end of the anchor chain pipe are cut, the anchor platform is hoisted by a crane. When hoisting, pay attention to the accurate alignment of the equal dividing line of the anchor platform package and the equal dividing line of the outer plate to ensure the installation accuracy of the anchor platform. At the same time, pay attention to the gap between the anchor platform package and the outer plate. If the gap between the anchor platform package and the outer plate of the hull exceeds 5mm, that is, the local gap exceeds the standard, the upper end of the anchor platform package should be partially trimmed to ensure the overall gap of the anchor platform.

[0019] Those skilled in the art should understand that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for achieving zero-residue hoisting of a ship anchor platform, characterized in that: The specific steps include: S1. Make anchor platform and build tire frame according to the drawings; S2. Data state conversion of theoretical coordinates of the upper edge of the anchor plate and the angle joint position between the lower edge of the anchor plate and the anchor lip panel; S3. Preparation of ground line benchmark at anchor platform construction site; S4. Anchor platform construction; S5. Linear data collection of the angle joint position between the hull outer plate and the anchor platform, and net line point finding of the anchor chain tube and the anchor platform cover plate; S6. Cut the anchor base plate and anchor chain pipe surplus according to the net line; S7. After the excess is cut, the anchor platform is hoisted.

2. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 1, characterized in that: The S2 specifically converts the theoretical coordinates of the upper end of the anchor plate package and the theoretical coordinates of the corner joint position between the lower end of the anchor plate package and the anchor lip panel into the coordinates of the anchor plate manufacturing site using a three-point conversion program with the center of the anchor lip panel as the zero point and the major axis of the anchor lip ellipse as the reference axis.

3. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 1, characterized in that: The S3 is specifically as follows: during the anchor lip tire mounting stage, the anchor lip is positioned in the tire frame according to the tire frame cross ground line. After the anchor lip panel is installed, the tire frame cross ground line is reversed to the anchor lip panel. Then, a total station is used to determine the axis with the center of the anchor lip panel ellipse as the zero point and the major axis of the anchor lip panel ellipse as the reference. The axis direction measured by the total station is consistent with the direction when the coordinate three points in S2 are converted. Four reference points are made and marked on the ground within 0.5m-2m from the edge of the anchor platform tire frame, and the coordinate data of the reference points are recorded.

4. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 1, characterized in that: The S4 is specifically as follows: After the ground wire benchmark is completed at the anchor platform construction site, the anchor platform plate iron sample box is made based on the anchor lip panel and the anchor platform frame. During the anchor platform plate curve processing stage, the iron sample box is used to verify the plate line shape to ensure that the anchor platform plate line shape is consistent with the anchor platform iron sample box line shape. After the anchor platform plate line shape is processed in place, it is put into construction.

5. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 3, characterized in that: The S5 specifically includes the following steps: S51. After the hull structure is completed, a total station is used to make a ground line based on the section where the anchor is located, and the line data of the corner joint position between the anchor package plate and the hull outer plate is collected based on the ground line. The center point of the anchor chain pipe insertion and installation position on the hull outer plate and the position of the sixteen equally divided points when the anchor is installed are determined, and the actual measured numerical coordinates of the sixteen equally divided points are recorded for backup. Then, an ellipse of the anchor chain pipe on the outer plate is drawn according to the center point and the drawing data, and 100mm inspection lines of the ellipse and the sixteen equally divided points are drawn at the same time. Then, a hole is opened on the ellipse of the anchor chain pipe insertion position on the hull outer plate, and the anchor chain pipe is inserted. After the anchor chain pipe is inserted and installed, the total station is used to find the net line point of the anchor chain pipe based on the ground line and draw the net line and 100mm inspection line; S52. After the construction of the anchor platform is completed, use the total station to find the net line points of the anchor platform package plate based on the four reference points made on the ground in S3. These net line points are also the points that need to be matched with the sixteen equally divided points on the outer plate of the anchor platform installation position in the later stage. After the net line points are found, connect the points to draw the net line, and make a 100mm inspection line for the net line.

6. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 5, characterized in that: In said S52, when finding the net line point on the anchor base plate, it is necessary to consider the linear data of the sixteen equally divided points of the hull outer plate at the angle joint position with the anchor base. If the outer plate linearity of the anchor base installation position on the segment is detected by the total station with the ground line reference described in S51, and compared with the theoretical coordinates of the hull outer plate at this point, if the detected data is larger than the theoretical data, that is, the outer plate linearity is larger, then the excess part of the anchor base plate is cut off by the anchor base plate margin. If the outer plate linearity is smaller, a small part is reserved for the anchor base plate margin to ensure that the size of the anchor base plate fits the outer plate linearity to the greatest extent.

7. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 6, characterized in that: The S6 is specifically as follows: prepare a cutting knife, and cut the upper margin of the anchor platform package and the lower margin of the anchor chain pipe according to the net line made in S5. During the cutting process, refer to the 100mm inspection line to ensure that the distance between the cutting position and the 100 inspection line is always maintained at 100mm to ensure the accuracy after cutting.

8. A control method for achieving zero-residue hoisting of a ship anchor platform according to claim 7, characterized in that: The S7 is specifically as follows: after the upper margin of the anchor platform package and the lower margin of the anchor chain pipe are cut, the anchor platform is hoisted by a crane. When hoisting, attention should be paid to the accurate alignment of the sixteen equally divided points on the anchor platform package with the equally divided points on the hull outer plate to ensure the installation accuracy of the anchor platform. At the same time, attention should be paid to the corner joint gap between the anchor platform package and the hull outer plate. If the joint gap between the anchor platform package and the hull outer plate exceeds 5mm, that is, the local gap exceeds the standard, the upper edge of the anchor platform package should be partially trimmed to ensure the overall gap of the anchor platform.

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