A positioning method for ship bow section construction

Abstract

The present invention provides a positioning method for the construction of a bow section of a ship. The positioning method uses a precision three-dimensional coordinate system to create a three-dimensional coordinate system for the key points of the anchoring equipment in the production and construction process of ships, especially liquefied gas ship bow sections, so as to establish three-dimensional coordinates for the key points of the anchoring equipment, so as to be used for the splicing of the port and starboard sections, and the positioning and installation precision control of components such as the anchor winch base, the chain picker, the anchor winch rope drum, and the anchor winch sprocket. During installation, the real-time coordinates of the key points of the anchoring equipment are collected and measured by a total station, and the real-time coordinate values ​​are analyzed to see whether they meet the requirements, and then corresponding corrections and adjustments are made according to the deviation, so that the accuracy of the installation of the bow section is more accurate. The original production process generates a large number of open cuts and cuts to delay production, which can be transformed into a new process technology without the phenomenon of re-cutting, thereby improving production efficiency and shortening the docking cycle.

Description

Technical Field

[0001] The invention relates to the field of ship construction, and in particular to a positioning method for ship bow section construction. Background Art

[0002] In the existing shipbuilding process, when constructing the bow section of a liquefied gas carrier, the upper and lower and left and right sections form the bow section in the assembly stage, and the main hull is formed during the docking stage, and then the anchoring equipment is installed, and finally the shipbuilding process technology plan is completed.

[0003] There are defects in the original production process of liquefied gas tankers, mainly manifested in the lack of precision control in the process of block construction according to the construction drawings, including the marking and rebutting of the center lines of the anchor winch and the chain picker, the marking and rebutting of the center line of the anchor winch axle, and the precision control when installing the top reinforcement of the internal structure of the main deck. The positioning accuracy deviation of each block assembly stage causes the position dislocation of the top reinforcement. The precision deviation caused by the hoisting and docking of the bow large block to the main hull increases the misalignment of the anchor equipment and the top reinforcement. The anchor equipment installation caused a lot of misalignment when the paint scraping top reinforcement position accuracy of the main deck was rough, which required repair and welding operations. The assembly accuracy of the hoisting structure required operators to perform high-altitude operations, a large number of scaffolding obstructions, and size data control, which increased the risk of construction difficulty. In addition, although the installation of the top reinforcement ribs was marked and installed according to the technical requirements of the drawings, it was not conducive to measuring the accuracy of the reinforcement installation due to the wide coverage of the structure and the small space. From the entire production and construction process, it can be seen that high-altitude and narrow space operations lead to safety risks, waste of materials and labor costs, and low productivity, which cannot effectively meet the rapid development trend of shipbuilding.

[0004] Therefore, it is necessary to propose a method to solve the positioning problem during the construction of the bow section of the ship, so as to achieve precision control during construction through precise positioning. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a positioning method for the construction of a bow section of a ship, so as to solve the positioning problem during the construction of the bow section in the prior art.

[0006] To achieve the above-mentioned object and other related objects, the present invention provides a positioning method for the construction of a bow section of a ship, the positioning method comprising the following steps:

[0007] The bow and stern direction of the ship is taken as the X-axis, the direction perpendicular to the bow and stern on the horizontal plane is taken as the Y-axis, and the direction perpendicular to the horizontal plane is taken as the Z-axis; among which, X=0 at the stern, Y=0 at the centerline of the main deck, and Z=0 at the baseline of the main hull;

[0008] Take the three vertices of the bow single-side deck as K, J, and M, and calculate the coordinate values ​​of the three points K, J, and M, where the line connecting the two points K and J is the rib position line parallel to the Y-axis direction, and the line connecting the two points K and M is parallel to the X-axis; the coordinate X values ​​of the three points K, J, and M are calculated through the rib position line, X = the rib position number of the rib position line × rib distance; the coordinate Y values ​​of the three points K, J, and M are the distance values ​​from the center line of the deck; the coordinate Z values ​​of the three points K, J, and M are obtained by the distance from the main hull baseline in the vertical direction. The bow single-side deck includes the bow left deck and the bow right deck that are symmetrical to each other;

[0009] According to the construction drawings, the relative horizontal distances between the intersection points Q and G formed by the center line of the anchor winch chain picket and the edge of the single-side deck of the bow and the straight line KJ and the straight line KM are determined, thereby obtaining the X and Y coordinate values ​​of the two points Q and G; since the relative height of the deck gradually decreases from the center line to the outside of the ship, according to the relative distances between the two points Q and G and the center line of the main deck and the relative horizontal distances between the two points Q and G and the center line of the main deck, combined with the Pythagorean theorem, the relative vertical distances between the two points Q and G and the center line of the main deck are obtained, and then combined with the coordinate Z value of the center line of the main deck, the Z coordinate values ​​of the two points Q and G are obtained.

[0010] Preferably, the method further comprises the following steps:

[0011] The center line of the anchor chain pipe and the edge of the single-side deck of the bow form intersections T and I, and the center line of the anchor winch rope drum and the edge of the single-side deck of the bow form intersections U and Z. The relative horizontal distances of T, I, U, and Z from the straight line KJ and the straight line KM are determined according to the construction drawings, so as to obtain the X and Y coordinate values ​​of T, I, U, and Z. Since the relative height of the deck gradually decreases from the center line to the outside of the ship, according to the relative distances of T, I, U, and Z from the center line of the main deck and the relative horizontal distances of T, I, U, and Z from the center line of the main deck, combined with the Pythagorean theorem, the relative vertical distances of T, I, U, and Z from the center line of the main deck are obtained, and then combined with the coordinate Z value of the center line of the main deck, the Z coordinate value of T, I, U, and Z is obtained.

[0012] Preferably, the method further comprises the following steps:

[0013] Rib frames, bulkheads and outer plate structures are installed on the bow left deck and the bow right deck to form a port section and a starboard section respectively, and the port section and the starboard section are spliced, wherein the starboard section has reference points A and F located on the center line of the main deck, and the vertical planes where A and F are located intersect with the starboard section to form another two reference points C and N, and n mutually symmetrical monitoring points are selected on the port section and the starboard section respectively, so that the relative distances between the symmetrical monitoring points of the port section and the starboard section and the reference points are equal.

[0014] Preferably, the line connecting the intersection points Q and G intersects with the line connecting the intersection points T and I at point X0, and the line connecting the intersection points Q and G intersects with the line connecting the intersection points U and Z at point Y0; a positioning point where the anchor winch base and the chain picker are installed is created, the X value of the positioning point = the distance between the positioning point and the adjacent rib position line + the rib position number of the adjacent rib position line × the rib distance, and the Y value of the positioning point = the distance between the positioning point and the center line of the deck.

[0015] Preferably, the Z value of the positioning point is obtained by the following method:

[0016] The main deck is inclined relative to the horizontal plane, and has a throw value ps = main deck beam arch height h0 / main deck half-width b. For the Z value of any point on the deck, the horizontal distance between the point and the center line of the main deck is measured, and combined with the throw value ps, the vertical distance h1 of the point relative to the horizontal plane where the edge of the main deck is located is obtained by the principle of similar triangles, and then combined with the coordinate Z value h of the center line of the main deck, the Z value coordinate of the point is obtained = h-h0+h1.

[0017] Preferably, the method further comprises the following steps:

[0018] According to the construction drawings, the coordinate Z value of the center line of the main deck is h, the closest distance between the horizontal plane of the anchor winch base and the upper surface of the main deck is h20, the distance from the center of the anchor winch rope drum to the horizontal plane of the anchor winch base is h22, and the height from the anchor winch sprocket shaft to the center of the anchor winch rope drum is h23. Then, the coordinate Z value of the horizontal plane of the anchor winch base is h-h0+h30+△+h20, the coordinate Z value of the center of the anchor winch rope drum is h-h0+h30+△+h20+h22, and the coordinate Z value of the anchor winch sprocket shaft is h-h0+h30+△+h20+h22+h23; wherein, h30 is the vertical distance from the intersection of the vertical line where h20 is located and the lower surface of the main deck to the center line of the main deck, △ is the main deck plate thickness, and h0 is the main deck beam arch height.

[0019] As described above, the present invention provides a positioning method for the construction of a bow section of a ship. The positioning method creates a precise three-dimensional coordinate system for the bow section of a ship, especially a liquefied gas ship, in the production and construction process, and establishes three-dimensional coordinates for the key points of the anchoring equipment, so as to be used for the splicing of the port and starboard sections, as well as the positioning and installation precision control of components such as the anchor winch base, the chain picker, the anchor winch rope drum, and the anchor winch sprocket. During installation, the real-time coordinates of the key points of the anchoring equipment are collected and measured by a total station, and the real-time coordinate values ​​are analyzed to see whether they meet the requirements, and then the corresponding corrections and adjustments are made according to the deviation, so that the accuracy of the installation of the bow section is more accurate. The original production process generates a large number of cuts and cuts that delay production, which can be transformed into a new process technology without the phenomenon of re-cutting and repairing, which improves production efficiency and shortens the docking cycle, and promotes the company's outstanding innovative technological innovation in the construction process technology of high-value liquefied gas ships or ultra-large container ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic structural diagram of a bow single-side deck according to the present invention.

[0021] Figure 2 A schematic diagram showing the splicing of the port section and the starboard section.

[0022] Figure 3 Schematic diagram showing the calculation of the coordinate Z value of the point height.

[0023] Figure 4 Shown is a top view of the structure for creating the anchor winch base and chain picker.

[0024] Figure 5 Shown is a schematic diagram of the selection of positioning points for the anchor winch base and chain picker.

[0025] Figure 6 Shown is a schematic diagram of coordinate calculation for the installation height of the anchor winch.

[0026] Figure 7 Shown is a schematic diagram of the structure of the anchor winch.

[0027] Component number description

[0028] 10 Tire frame

[0029] 20 Main Deck

[0030] 40 Shelving tooling

[0031] 50 Main Deck

[0032] 60 Anchor winch chain centerline

[0033] 70 Anchor chain hole

[0034] 80 Chain Remover

[0035] 90 Anchor winch base

[0036] 100 Anchor winch rope drum centerline

[0037] 110 Centerline of anchor pipe DETAILED DESCRIPTION

[0038] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0039] For example, when describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic view is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional space dimensions of length, width and depth should be included.

[0040] For ease of description, spatial relational terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatial relational terms are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. As used herein, "between..." means including the end point values.

[0041] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0042] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and therefore the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0043] like Figure 1 As shown, the present invention provides a positioning method for the construction of a bow section of a ship, comprising the following steps:

[0044] S1: The bow and stern direction of the ship is the X-axis, the direction perpendicular to the bow and stern on the horizontal plane is the Y-axis, and the direction perpendicular to the horizontal plane is the Z-axis. Among them, X=0 at the stern, Y=0 at the centerline of the main deck, and Z=0 at the baseline of the main hull.

[0045] like Figure 1 As shown, the three vertices of the bow single-side deck are taken as K, J, and M, and the coordinate values ​​of the three points K, J, and M are calculated, wherein the line connecting the two points K and J is a rib position line parallel to the Y-axis direction, and the line connecting the two points K and M is parallel to the X-axis; the coordinate X values ​​of the three points K, J, and M are calculated through the rib position line, X=rib position number of the rib position line×rib distance; the coordinate Y values ​​of the three points K, J, and M are the distance values ​​from the center line of the deck; the coordinate Z values ​​of the three points K, J, and M are obtained by the distance from the main hull baseline in the vertical direction, and the bow single-side deck includes the bow left deck and the bow right deck which are symmetrical to each other;

[0046] According to the construction drawings, the relative horizontal distances between the intersection points Q and G formed by the center line of the anchor winch chain picket and the edge of the single-side deck of the bow and the straight line KJ and the straight line KM are determined, thereby obtaining the X and Y coordinate values ​​of the two points Q and G; since the relative height of the deck gradually decreases from the center line to the outside of the ship, according to the relative distances between the two points Q and G and the center line of the main deck and the relative horizontal distances between the two points Q and G and the center line of the main deck, combined with the Pythagorean theorem, the relative vertical distances between the two points Q and G and the center line of the main deck are obtained, and then combined with the coordinate Z value of the center line of the main deck, the Z coordinate values ​​of the two points Q and G are obtained.

[0047] The center line of the anchor chain pipe and the edge of the single-side deck of the bow form intersections T and I, and the center line of the anchor winch rope drum and the edge of the single-side deck of the bow form intersections U and Z. The coordinate values ​​of T, I, U, and Z are obtained according to the above method. Among them, the center line of the anchor winch chain breaker is used to locate and install the anchor winch and chain breaker; the center line of the anchor winch rope drum is used to locate and install the anchor winch rope drum, and the center line of the anchor chain pipe is used to locate and install the anchor chain pipe.

[0048] Specifically, the relative horizontal distances of T, I, U, and Z from the straight line KJ and the straight line KM are determined according to the construction drawings, so as to obtain the X and Y coordinate values ​​of the T, I, U, and Z. Since the relative height of the deck gradually decreases from the centerline to the outboard, the relative vertical distances of T, I, U, and Z from the centerline of the main deck are obtained according to the relative distances of T, I, U, and Z from the centerline of the main deck and the relative horizontal distances of T, I, U, and Z from the centerline of the main deck, combined with the Pythagorean theorem, and then the Z coordinate values ​​of T, I, U, and Z are obtained in combination with the coordinate Z value of the centerline of the main deck. In addition, the straight lines QG, TI, and UZ can be used as references for installing the anti-top reinforcement structure.

[0049] Rib frames, bulkheads and outer plate structures are installed on the bow left deck and the bow right deck to form a port section and a starboard section respectively, and the port section and the starboard section are spliced ​​together, such as Figure 2 As shown, the starboard section has reference points A and F located on the centerline of the main deck, and the vertical planes where A and F are located intersect with the starboard section to form another two reference points C and N. n mutually symmetrical monitoring points B, J, D, G, M, O, K, and Q are selected on the port section and the starboard section respectively, so that the relative distances between the symmetrical monitoring points of the port section and the starboard section and the reference points A, F, C, and N are equal, thereby controlling the installation accuracy, and the coordinates of the monitoring points are obtained by the above-mentioned method similar to the coordinate positioning of the two points Q and G.

[0050] like Figure 4 As shown, the line connecting the intersection points Q and G intersects with the line connecting the intersection points T and I at point X0, and the line connecting the intersection points Q and G intersects with the line connecting the intersection points U and Z at point Y0. Create a positioning point for the anchor winch base and the chain picker to be installed and positioned. The X value of the positioning point = the distance between the positioning point and the adjacent rib position line + the rib position number of the adjacent rib position line × the rib distance. The Y value of the positioning point = the distance between the positioning point and the center line of the splint. The Z value of the positioning point is obtained by the following method:

[0051] like Figure 3 As shown, the main deck is inclined relative to the horizontal plane, and has a throw value ps = main deck beam arch height h0 / main deck half-width b (width). For the Z value of any point on the deck, the horizontal distance between the point and the center line of the main deck is measured, and combined with the throw value ps, the vertical distance h1 of the point relative to the horizontal plane where the edge of the main deck is located is obtained by the principle of similar triangles, and then combined with the coordinate Z value h of the center line of the main deck, the Z value coordinate of the point is obtained = h-h0+h1.

[0052] Specifically, the positioning points of the anchor winch base are points e, f, k, l, m, n, o, p, q, r, s, and t; the positioning points of the chain picker are points g, i, j, and u.

[0053] According to the construction drawings, the coordinate Z value of the center line of the main deck is h, the closest distance between the horizontal plane of the anchor winch base and the upper surface of the main deck is h20, the distance from the center of the anchor winch rope drum to the horizontal plane of the anchor winch base is h22, and the height from the anchor winch sprocket shaft to the center of the anchor winch rope drum is h23. The coordinate Z value of the horizontal plane of the anchor winch base is h-h0+h30+△+h20, the coordinate Z value of the center of the anchor winch rope drum is h-h0+h30+△+h20+h22, and the coordinate Z value of the anchor winch sprocket shaft is h-h0+h30+△+h20+h22+h23. h30 is the vertical distance from the intersection of the vertical line where h20 is located and the lower surface of the main deck to the center line of the main deck, △ is the thickness of the main deck plate, and h0 is the height of the main deck beam arch.

[0054] Specifically, three points of the anchor winch sprocket shaft are selected as d, d1, and d2; two points of the anchor winch rope drum center are selected as e and f; and three points of the chain picker shaft are selected as a, b, and c. Thus, positioning accuracy control is achieved through the coordinates of these points.

[0055] In summary, the present invention provides a positioning method for the construction of a bow section of a ship. This positioning method is used to create a precise three-dimensional coordinate system for the bow section of a ship, especially a liquefied gas ship, in the production and construction process, and to establish three-dimensional coordinates for the key points of the anchoring equipment, so as to be used for the splicing of the port and starboard sections, as well as the positioning and installation precision control of components such as the anchor winch base, the chain picker, the anchor winch rope drum, and the anchor winch sprocket. During installation, the real-time coordinates of the key points of the anchoring equipment are collected and measured by a total station, and the real-time coordinate values ​​are analyzed to see whether they meet the requirements, and then corresponding corrections and adjustments are made according to the deviation, so that the accuracy of the installation of the bow section is more accurate. The original production process, which produces a large number of cuts and repairs and delays production, can be transformed into a new process technology that does not produce re-repair and cutting, improves production efficiency and shortens the docking cycle, while promoting the company's outstanding innovative technological innovation in the construction process technology of high-value liquefied gas ships or ultra-large container ships.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A positioning method for the construction of a bow section of a ship, characterized in that: The positioning method comprises the following steps: The bow and stern direction of the ship is taken as the X-axis, the direction perpendicular to the bow and stern on the horizontal plane is taken as the Y-axis, and the direction perpendicular to the horizontal plane is taken as the Z-axis; among which, X=0 at the stern, Y=0 at the centerline of the main deck, and Z=0 at the baseline of the main hull; Take the three vertices of the bow single-side deck as K, J, and M, and calculate the coordinate values ​​of the three points K, J, and M, where the line connecting the two points K and J is the rib position line parallel to the Y-axis direction, and the line connecting the two points K and M is parallel to the X-axis; the coordinate X values ​​of the three points K, J, and M are calculated through the rib position line, X = the rib position number of the rib position line × rib distance; the coordinate Y values ​​of the three points K, J, and M are the distance values ​​from the center line of the deck; the coordinate Z values ​​of the three points K, J, and M are obtained by the distance from the main hull baseline in the vertical direction. The bow single-side deck includes the bow left deck and the bow right deck that are symmetrical to each other; According to the construction drawings, the relative horizontal distances between the intersection points Q and G formed by the center line of the anchor winch chain picket and the edge of the single-side deck of the bow and the straight line KJ and the straight line KM are determined, thereby obtaining the X and Y coordinate values ​​of the two points Q and G; since the relative height of the deck gradually decreases from the center line to the outside of the ship, according to the relative distances between the two points Q and G and the center line of the main deck and the relative horizontal distances between the two points Q and G and the center line of the main deck, combined with the Pythagorean theorem, the relative vertical distances between the two points Q and G and the center line of the main deck are obtained, and then combined with the coordinate Z value of the center line of the main deck, the Z coordinate values ​​of the two points Q and G are obtained.

2. The positioning method according to claim 1, characterized in that: The following steps are also included: The center line of the anchor chain pipe and the edge of the single-side deck of the bow form intersections T and I, and the center line of the anchor winch rope drum and the edge of the single-side deck of the bow form intersections U and Z. The relative horizontal distances of T, I, U, and Z from the straight line KJ and the straight line KM are determined according to the construction drawings, so as to obtain the X and Y coordinate values ​​of T, I, U, and Z. Since the relative height of the deck gradually decreases from the center line to the outside of the ship, according to the relative distances of T, I, U, and Z from the center line of the main deck and the relative horizontal distances of T, I, U, and Z from the center line of the main deck, combined with the Pythagorean theorem, the relative vertical distances of T, I, U, and Z from the center line of the main deck are obtained, and then combined with the coordinate Z value of the center line of the main deck, the Z coordinate value of T, I, U, and Z is obtained.

3. The positioning method according to claim 1, characterized in that: The following steps are also included: Rib frames, bulkheads and outer plate structures are installed on the bow left deck and the bow right deck to form a port section and a starboard section respectively, and the port section and the starboard section are spliced, wherein the starboard section has reference points A and F located on the center line of the main deck, and the vertical planes where A and F are located intersect with the starboard section to form another two reference points C and N, and n mutually symmetrical monitoring points are selected on the port section and the starboard section respectively, so that the relative distances between the symmetrical monitoring points of the port section and the starboard section and the reference points are equal.

4. The positioning method according to claim 1, characterized in that: The line connecting the intersection points Q and G intersects with the line connecting the intersection points T and I at point X0, and the line connecting the intersection points Q and G intersects with the line connecting the intersection points U and Z at point Y0; a positioning point for the installation and positioning of the anchor winch base and the chain picker is created, the X value of the positioning point = the distance between the positioning point and the adjacent rib position line + the rib position number of the adjacent rib position line × the rib distance, and the Y value of the positioning point = the distance between the positioning point and the center line of the deck.

5. The positioning method according to claim 4, characterized in that: The Z value of the positioning point is obtained by the following method: The main deck is inclined relative to the horizontal plane, and has a throw value ps = main deck beam arch height h0 / main deck half-width b. For the Z value of any point on the deck, the horizontal distance between the point and the center line of the main deck is measured, and combined with the throw value ps, the vertical distance h1 of the point relative to the horizontal plane where the edge of the main deck is located is obtained by the principle of similar triangles, and then combined with the coordinate Z value h of the center line of the main deck, the Z value coordinate of the point is obtained = h-h0+h1.

6. The positioning method according to claim 1, characterized in that: The following steps are also included: According to the construction drawings, the coordinate Z value of the center line of the main deck is h, the closest distance between the horizontal plane of the anchor winch base and the upper surface of the main deck is h20, the distance from the center of the anchor winch rope drum to the horizontal plane of the anchor winch base is h22, and the height from the anchor winch sprocket shaft to the center of the anchor winch rope drum is h23. Then, the coordinate Z value of the horizontal plane of the anchor winch base is h-h0+h30+△+h20, the coordinate Z value of the center of the anchor winch rope drum is h-h0+h30+△+h20+h22, and the coordinate Z value of the anchor winch sprocket shaft is h-h0+h30+△+h20+h22+h23; wherein, h30 is the vertical distance from the intersection of the vertical line where h20 is located and the lower surface of the main deck to the center line of the main deck, △ is the main deck plate thickness, and h0 is the main deck beam arch height.

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