A method for controlling the installation accuracy of a container ship positioning pin

Abstract

The application discloses a container ship positioning pin installation precision control method, wherein in the part machining stage, the assembly compensation of the circumferential components at different positions is set, then the circumferential components at the ship side positioning pin and the pin hole thereof on the cabin section, the circumferential components at the ship center positioning pin pin hole, and the circumferential components at the positioning pin pin hole of the transverse hatch coaming section are moved to the section construction stage for welding and fixing, the ship center positioning pin on the cabin section and the positioning pin of the transverse hatch coaming section are positioned by spot welding in the section construction stage, and are welded and fixed in the subsequent general assembly or loading stage, so that the problems of long construction period and large allowance cutting workload caused by the traditional scattered installation of the positioning pin in the general assembly platform or the dock stage are effectively solved, the positioning pin installation precision and welding quality are improved, the related construction period is shortened, the one-time hoisting and loading controllability and success rate of the hatch cover are improved, and the construction cost is saved.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding precision control technology, and in particular to a method for controlling the installation precision of locating pins on container ships. Background Technology

[0002] Currently, the width of various ultra-large container ships exceeds 50m, which increases the difficulty of controlling the installation precision of large hatch covers. The installation of large hatch covers is closely related to locating pins, and the internal reinforcement structure around the locating pin positions is complex. Once the locating pins are installed and welded, secondary corrections are difficult to make, making the installation precision of the locating pins particularly important. Currently, the locating pins on bulkheads or hatch coamings are installed piecemeal during subsequent assembly or assembly stages. This construction method involves a large amount of manual trimming work, which not only prolongs the time frame in the dry dock at the bulkhead assembly site but also reduces the welding quality at the locating pin positions. This is detrimental to high-quality and rapid ship construction, indicating significant room for optimization. Summary of the Invention

[0003] In view of this, the present invention provides a method for controlling the installation accuracy of locating pins on container ships. This method solves the problems of poor installation accuracy of locating pins on large container ships and long construction period for welding on assembly platforms or in docks. It improves the installation accuracy and welding quality of locating pins while shortening the relevant construction cycle, thereby improving the controllability and success rate of hatch cover hoisting and installation, and saving construction costs.

[0004] A method for controlling the installation accuracy of locating pins on container ships, specifically including the following steps: S1, Based on the installation position of the peripheral components, add the set assembly compensation amount to the peripheral components during processing; Among them, the peripheral components installed at the hull positioning pin holes of the compartment section are given an additional -1mm assembly compensation amount, the peripheral components installed at the midship positioning pin holes of the compartment section are given an additional 5mm assembly compensation amount, and the peripheral components installed at the positioning pin holes of the transverse hatch coaming section are given an additional 20mm assembly compensation amount. S2, the sectional construction stage, the peripheral components at the midship positioning pin holes of the compartment section, the hull positioning pins and their peripheral components at the pin holes are all welded and installed in place, and the midship positioning pins of the compartment section are spot welded and positioned in their pin holes. Weld and install the peripheral components at the positioning pin holes of the transverse hatch coaming section into place, and spot weld the positioning pins of the transverse hatch coaming section into the pin holes. S3, the bulkhead section assembly stage, involves adjusting the positioning accuracy of the midship positioning pins before welding and fixing them. During the sectional assembly stage of the transverse hatch coaming, the positioning accuracy of the positioning pins of the transverse hatch coaming sections is adjusted before welding and fixing.

[0005] In a preferred embodiment, in step S2, when installing the hull positioning pin of the compartment section and the peripheral components at the pin hole, the peripheral components at the pin hole of the hull positioning pin are first positioned and installed with the hull centerline or the section reference line as a reference. After the peripheral components at the pin hole of the hull positioning pin are welded and fixed, the hull positioning pin is then welded and fixed in the pin hole surrounded by the peripheral components. The center of the pin of the hull positioning pin should maintain a distance of ±3mm from the hull centerline or the section reference line, and the verticality deviation of the pin should be controlled within ±1mm.

[0006] In a preferred embodiment, the specific steps for adjusting the positioning accuracy of the midship positioning pin in step S3 are as follows: S31, Measure the distance A between the two side hull positioning pins and the distance D between the two midship positioning pins; S32, determine whether the deviation between the distance A between the two side hull positioning pins and the theoretical value is within the theoretical error range. If it is not within the theoretical error range, adjust the weld allowance of the butt weld between the two compartment sections, and then execute step S33. Otherwise, directly execute step S33. S33, determine whether the deviation between the distance D between the two midship positioning pins and the theoretical value is within the theoretical error range. If it is not within the theoretical error range, adjust the position of one or both midship positioning pins according to the distance D between the two midship positioning pins and the distance C between the two midship positioning pins and the positioning pins on the side of the ship on their respective sides.

[0007] In a preferred embodiment, in step S32, after adjusting the weld allowance of the butt weld between the two compartment sections, it is also necessary to determine whether the deviation between the distance Y between the container guide rails and the theoretical value is within the theoretical error range. If the deviation between the distance Y between the container guide rails and the theoretical value is not within the theoretical error range, the position of the container guide rails is adjusted.

[0008] In a preferred embodiment, in step S33, when adjusting the position of one or both midship positioning pins based on the distance D between the two midship positioning pins and the distance C between the two midship positioning pins and the positioning pins on their respective sides of the ship, If the distance D between the two midship locating pins is greater than the theoretical value, and the deviation C between the distance C between one of the midship locating pins and the locating pin on its side is not within the theoretical error range, then move the midship locating pin towards the midship direction until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is greater than the theoretical value, and the deviations C between the two midship locating pins and the locating pins on their respective sides of the ship's side are not within the theoretical error range, then move the positions of the two midship locating pins simultaneously towards the midship direction until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is less than the theoretical value, and the deviation C between the distance C between one of the midship locating pins and the locating pin on the side of the ship is not within the theoretical error range, then move the midship locating pin towards the ship's side until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is less than the theoretical value, and the deviations C between the two midship locating pins and the locating pins on their respective sides of the ship's side are all outside the theoretical error range, then the positions of the two midship locating pins are moved simultaneously towards the ship's side until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements.

[0009] The beneficial effects of this invention are: This application addresses the issues of long construction periods and large amounts of excess material cutting associated with traditional bulk-mounted installation of positioning pins on assembly platforms or in docks. It involves adding pre-set assembly compensation amounts to peripheral components at different locations during the parts processing stage, then moving the peripheral components at the hull positioning pin holes on the bulkhead sections, the midship positioning pin holes, and the transverse hatch coaming sections forward to the section construction stage for welding and fixing. This process, which involves spot welding the midship positioning pins on the bulkhead sections and the transverse hatch coaming sections during the section construction stage, and then welding them in place during subsequent assembly or installation stages, effectively solves the problems of long construction periods and large amounts of excess material cutting associated with traditional bulk installation of positioning pins on assembly platforms or in docks. This improves the installation accuracy and welding quality of the positioning pins while shortening the relevant construction cycle, thereby increasing the controllability and success rate of hatch cover installation and saving construction costs. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram showing the addition of compensation amount on the top plate of the bulkhead component at the locating pin hole of the hull of the compartment section.

[0012] Figure 2 This is a schematic diagram showing the addition of compensation amount on the top plate of the bulkhead components at the positioning pin holes of the midship section.

[0013] Figure 3 This is a schematic diagram showing the addition of compensation amount on the top plate of the hatch coaming, which is a peripheral component at the positioning pin hole of the transverse hatch coaming section.

[0014] Figure 4 This is a schematic diagram of the compartmentalized section assembly stage.

[0015] Figure 5 This is a schematic diagram of the components surrounding the locating pin hole.

[0016] The meanings of the labels in the diagram are as follows: 1. Compartment section; 2. Midships positioning pin; 3. Side positioning pin; 4. Hatch coaming top plate; 5. Container guide rail; 6. Butt weld between two compartment sections; 7. Compartment top plate; 8. Connecting plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0018] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0019] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0020] This invention provides a method for controlling the installation accuracy of locating pins on container ships, specifically including the following steps: S1, based on the installation position of the peripheral components, add the set assembly compensation amount to the peripheral components during processing.

[0021] The peripheral components refer to the components installed around the locating pin. The circular hole formed by the peripheral components after installation is the locating pin hole, and the pin of the locating pin is welded and fixed in the locating pin hole.

[0022] There are three types of locating pins on container ships: locating pins installed amidships of the bulkhead section, locating pins installed on the hull side of the bulkhead section, and locating pins installed on the transverse hatch coaming section.

[0023] When manufacturing the peripheral components installed at the hull locating pin holes of the bulkhead sections, a -1mm assembly compensation allowance is added to their dimensions. Similarly, when manufacturing the peripheral components installed at the midship locating pin holes of the bulkhead sections, a 5mm assembly compensation allowance is added to their dimensions. As shown in the figure, both the peripheral components at the hull locating pin holes and the midship locating pin holes on the bulkhead sections consist of a horizontally positioned bulkhead top plate 7 and multiple connecting plates 8 vertically fixed to the lower surface of the bulkhead top plate. The area enclosed by the U-shaped slots on the bulkhead top plate 7 and the multiple connecting plates 8 forms the locating pin holes, where the hull locating pins / midship locating pins are fixed. When manufacturing these peripheral components, the dimensions of the U-shaped slots on the bulkhead top plate and the corresponding side dimensions of each connecting plate must be adjusted to include the set assembly compensation allowance.

[0024] When manufacturing the peripheral components installed at the locating pin holes of the transverse hatch coaming section, a 20mm assembly compensation allowance should be added to their dimensions. Similar to the bulkhead sections, the peripheral components at the locating pin holes on the transverse hatch coaming section consist of a horizontally positioned hatch coaming top plate 4 and multiple connecting plates 8 vertically fixed to the lower surface of the hatch coaming top plate. The area enclosed by the U-shaped slot on the hatch coaming top plate 4 and the multiple connecting plates 8 is the locating pin hole, and the locating pin is fixed in this locating pin hole. When manufacturing these peripheral components, a 20mm assembly compensation allowance should be added to the dimensions of the U-shaped slot on the hatch coaming top plate 4 and the corresponding side dimensions of each connecting plate 8.

[0025] S2, the sectional construction stage, involves welding and installing the peripheral components at the midship positioning pin holes of the compartment sections, as well as the peripheral components at the hull positioning pins and their pin holes, into place, and spot welding the midship positioning pins of the compartment sections into their pin holes.

[0026] Specifically, for the hull positioning pins and the surrounding components at their pin holes in the compartment sections, the hull centerline or section reference line is used as a reference to position and install the surrounding components at the pin holes of the hull positioning pins. After the surrounding components at the pin holes of the hull positioning pins are welded and fixed, the hull positioning pins are then welded and fixed in the pin holes formed by the surrounding components. The center of the pin of the hull positioning pin should maintain a distance of ±3mm from the hull centerline or section reference line, and the verticality deviation of the pin should be controlled within ±1mm.

[0027] For the midship locating pins and the surrounding components at their pin holes in the compartment sections, first, using the hull centerline or section reference line as a reference, position and install the surrounding components at the pin holes of the midship locating pins. After the surrounding components at the pin holes of the midship locating pins are welded and fixed, spot weld the midship locating pins into the pin holes formed by the surrounding components. The center of the pin post of the midship locating pin should maintain a distance of ±5mm from the hull centerline or section reference line, and the verticality deviation of the pin post should be controlled within ±1mm. The straightness of the midship locating pins in the same row should not exceed 5mm, and the horizontality deviation of the midship locating pins should be controlled within ±5mm.

[0028] For the locating pins on the transverse hatch coaming section, first weld and install the peripheral components at the pin holes of the locating pins of the transverse hatch coaming section into place, and then spot weld the locating pins of the transverse hatch coaming section into the pin holes.

[0029] S3, the bulkhead section assembly stage, involves adjusting the positioning accuracy of the midship positioning pins before welding and fixing them.

[0030] Specifically, the steps for adjusting the positioning accuracy of the midship locating pin are as follows: S31, measure the distance A between the hull positioning pins on both sides of the ship and the distance D between the two midship positioning pins.

[0031] S32, determine whether the deviation between the distance A between the two side hull positioning pins and the theoretical value is within the theoretical error range. If it is not within the theoretical error range, adjust the weld allowance of the butt weld between the two compartment sections, and then execute step S33. Otherwise, directly execute step S33. In a preferred embodiment, after adjusting the weld allowance of the butt weld 6 between the two compartment sections, it is also necessary to determine whether the deviation between the distance Y between the container guide rails and the theoretical value is within the theoretical error range. If the deviation between the distance Y between the container guide rails and the theoretical value is not within the theoretical error range, the position of the container guide rails is adjusted.

[0032] S33, determine whether the deviation between the distance D between the two midship positioning pins and the theoretical value is within the theoretical error range. If it is not within the theoretical error range, adjust the position of one or both midship positioning pins according to the distance D between the two midship positioning pins and the distance C between the two midship positioning pins and the positioning pins on the side of the ship on their respective sides.

[0033] When adjusting the position of one or both midship locating pins based on the distance D between the two midship locating pins and the spacing C between the two midship locating pins and the locating pins on their respective sides of the ship, If the distance D between the two midship locating pins is greater than the theoretical value, and the deviation C between the distance C between one of the midship locating pins and the locating pin on its side is not within the theoretical error range, then move the midship locating pin towards the midship direction until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is greater than the theoretical value, and the deviations C between the two midship locating pins and the locating pins on their respective sides of the ship's side are not within the theoretical error range, then move the positions of the two midship locating pins simultaneously towards the midship direction until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is less than the theoretical value, and the deviation C between the distance C between one of the midship locating pins and the locating pin on the side of the ship is not within the theoretical error range, then move the midship locating pin towards the ship's side until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is less than the theoretical value, and the deviations C between the two midship locating pins and the locating pins on their respective sides of the ship's side are all outside the theoretical error range, then the positions of the two midship locating pins are moved simultaneously towards the ship's side until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements.

[0034] During the sectional installation phase of the transverse hatch coaming, the positioning accuracy of the locating pins on the transverse hatch coaming sections is adjusted before welding and fixing. After the locating pins on the transverse hatch coaming sections are welded, the center-to-center distance between any two locating pins should be within ±5mm, the verticality deviation of the locating pins themselves should be within ±1mm, the straightness of the locating pin centers should be ≤5mm, and the horizontal deviation should be ±5mm.

[0035] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A method for controlling the installation accuracy of locating pins on container ships, characterized in that, Specifically, the following steps are included: S1, Based on the installation position of the peripheral components, add the set assembly compensation amount to the peripheral components during processing; Among them, the peripheral components installed at the hull positioning pin holes of the compartment section are given an additional -1mm assembly compensation amount, the peripheral components installed at the midship positioning pin holes of the compartment section are given an additional 5mm assembly compensation amount, and the peripheral components installed at the positioning pin holes of the transverse hatch coaming section are given an additional 20mm assembly compensation amount. S2, the sectional construction stage, the peripheral components at the midship positioning pin holes of the compartment section, the hull positioning pins and their peripheral components at the pin holes are all welded and installed in place, and the midship positioning pins of the compartment section are spot welded and positioned in their pin holes. Weld and install the peripheral components at the positioning pin holes of the transverse hatch coaming section into place, and spot weld the positioning pins of the transverse hatch coaming section into the pin holes. S3, the bulkhead section assembly stage, involves adjusting the positioning accuracy of the midship positioning pins before welding and fixing them. During the sectional assembly stage of the transverse hatch coaming, the positioning accuracy of the positioning pins of the transverse hatch coaming sections is adjusted before welding and fixing.

2. The method for controlling the installation accuracy of container ship positioning pins according to claim 1, characterized in that, In step S2, when installing the hull positioning pins and the surrounding components at their pin holes for the compartment sections, first use the hull centerline or section reference line as a reference to position and install the surrounding components at the pin holes of the hull positioning pins. After the surrounding components at the pin holes of the hull positioning pins are welded and fixed, the hull positioning pins are then welded and fixed in the pin holes formed by the surrounding components. The center of the pin of the hull positioning pin should maintain a distance of ±3mm from the hull centerline or section reference line, and the verticality deviation of the pin should be controlled within ±1mm.

3. The method for controlling the installation accuracy of container ship positioning pins according to claim 1, characterized in that, The specific steps for adjusting the positioning accuracy of the midship locating pin in step S3 are as follows: S31, Measure the distance A between the two side hull positioning pins and the distance D between the two midship positioning pins; S32, determine whether the deviation between the distance A between the two side hull positioning pins and the theoretical value is within the theoretical error range. If it is not within the theoretical error range, adjust the weld allowance of the butt weld between the two compartment sections, and then execute step S33. Otherwise, directly execute step S33. S33, determine whether the deviation between the distance D between the two midship positioning pins and the theoretical value is within the theoretical error range. If it is not within the theoretical error range, adjust the position of one or both midship positioning pins according to the distance D between the two midship positioning pins and the distance C between the two midship positioning pins and the positioning pins on the side of the ship on their respective sides.

4. The method for controlling the installation accuracy of container ship positioning pins according to claim 3, characterized in that, In step S32, after adjusting the weld allowance of the butt weld between the two compartment sections, it is also necessary to determine whether the deviation between the distance Y between the container guide rails and the theoretical value is within the theoretical error range. If the deviation between the distance Y between the container guide rails and the theoretical value is not within the theoretical error range, the position of the container guide rails is adjusted.

5. The method for controlling the installation accuracy of container ship positioning pins according to claim 3, characterized in that, In step S33, when adjusting the position of one or both midship positioning pins based on the distance D between the two midship positioning pins and the distance C between the two midship positioning pins and the positioning pins on their respective sides of the ship, If the distance D between the two midship locating pins is greater than the theoretical value, and the deviation C between the distance C between one of the midship locating pins and the locating pin on its side is not within the theoretical error range, then move the midship locating pin towards the midship direction until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is greater than the theoretical value, and the deviations C between the two midship locating pins and the locating pins on their respective sides of the ship's side are not within the theoretical error range, then move the positions of the two midship locating pins simultaneously towards the midship direction until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is less than the theoretical value, and the deviation C between the distance C between one of the midship locating pins and the locating pin on the side of the ship is not within the theoretical error range, then move the midship locating pin towards the ship's side until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements. If the distance D between the two midship locating pins is less than the theoretical value, and the deviations C between the two midship locating pins and the locating pins on their respective sides of the ship's side are all outside the theoretical error range, then the positions of the two midship locating pins are moved simultaneously towards the ship's side until the deviation between the distance D between the two midship locating pins and the theoretical value meets the requirements.

Images