Method for installing guide plate on ship

Abstract

The invention belongs to the technical field of ship construction, and particularly relates to a method for installing a guide plate on a ship. The method comprises the following steps: setting allowance of guide plate parts; the field actual flow guide plate machining line type and size are confirmed; determining the trepanning position of the guide plate on the outer plate; the positioning sequence, method and matters needing attention of the guide plates are selected according to the field segmentation state; the allowance added during blanking is cut according to requirements; the installation sequence, method and matters needing attention of the guide plates are selected according to the field segmentation state; and determining the precision size of the guide plate according to a laser theodolite. By correctly adding part allowance and controlling the installation process of the flow guide plate, most of the conditions such as construction difficulty in the construction process can be avoided, meanwhile, the fluid performance of fluid can be better improved, efficiency is improved, energy consumption is reduced, the structure is protected against damage of natural factors, and safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ship construction, and in particular relates to a method for installing a guide plate on a ship. Background Art

[0002] During the block construction of a ship, the guide vane, as one of the hull structures, needs to be installed and welded in the block stage. It is a key factor in the stability of the ship, involving the shape of the hull, load distribution and hydrodynamic characteristics. In particular, the guide vane at the connection between the bow thruster and the outer plate is of utmost importance. Due to its special position and thick plates, it is difficult to install and needs to be installed according to the corresponding process. Various errors in the installation process will cause the bow thruster to not match the outer plate and the opening. At this time, it is necessary to change the line shape of the bow thruster cylinder, the line shape of the outer plate, or remove all the guide vanes and reinstall them to match them. Therefore, the entire process of how to correctly install the guide vane is particularly important. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention mainly aims at the above problems and proposes a method for installing a guide plate on a ship, the purpose of which is to solve the problems of inaccurate size adjustment, difficult positioning and difficult to ensure welding quality during the installation of the guide plate.

[0005] (II) Technical solution

[0006] To achieve the above object, the present invention provides a method for installing a deflector on a ship, the method comprising the following steps:

[0007] Set the allowance for the guide plate parts to ensure that there is enough cutting allowance for size adjustment on site;

[0008] Confirm the actual processing size and line type of the guide plate after cutting on site, use measuring tools to check whether the cutting information is consistent with the actual object, and use samples and sample boxes to check whether the processing line type is in place;

[0009] Determine the opening position of the guide plate on the outer plate, and after calibrating the relative rib position line according to the outer plate opening polyester paper provided by the hull lofting, punch and leave marks along the edge of the polyester paper opening on the outer plate, and then mark the edge contour line as the cutting line for cutting;

[0010] Select the positioning sequence, method and precautions of the guide plates according to the on-site segmentation status;

[0011] Add margin when cutting materials according to requirements to ensure the size and line shape are in place;

[0012] Complete the deflector welding process, confirm the groove form of the deflector parts, the thrust cylinder and the outer plate, and weld based on the fillet weld form;

[0013] The precision dimensions of the guide plate are determined by the laser theodolite, compared with the 3D model data, and the polishing and grinding process is started after the precision status is confirmed.

[0014] Furthermore, when setting the allowance for the guide plate part, a 50mm allowance is added around the edge of the part in advance.

[0015] Furthermore, when confirming the actual processing size of the guide plate on site, the overall size shrinkage of the acceptance parts should be within 5mm. If it exceeds 10mm, it needs to be identified and handled according to the actual situation on site.

[0016] Furthermore, when determining the opening position of the guide plate on the outer plate, a sample punch is made every 10 mm for the non-straight edge and every 50 mm for the straight edge.

[0017] Furthermore, when positioning the guide plate, according to the distance between the edge of the bow thruster cylinder and the outer plate, the 2m baseline is used as the reference line, and the outer plate opening edge line and the thruster cylinder are marked according to the electronically calculated dimensions, and the upper and lower opening margins of the parts are trimmed and cut at the same time.

[0018] Furthermore, during the welding process of the guide plate, semi-automatic welding guns are used in open areas, while manual arc welding is used in narrow areas.

[0019] Furthermore, in the process of determining the precision size of the guide plate, each 100 mm is a level, and the accuracy is confirmed by comparing the X-axis, Y-axis, and Z-axis data based on the three-dimensional model data.

[0020] Furthermore, after the guide plate is installed and welded, a comprehensive inspection is carried out.

[0021] Furthermore, after the polishing and grinding process is completed, the guide plate is subjected to anti-corrosion treatment.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the present invention provides a method for installing a guide plate on a ship, which ensures that the size adjustment of the guide plate in the actual installation process is more flexible, the positioning is more accurate, and the welding quality is higher by setting the part addition and placement allowance, accurately confirming the processing size and line type, reasonably determining the opening position and positioning order, and using a laser theodolite for precision detection. The present invention can guide the fluid to flow along a specific path, reduce turbulence and eddy currents, thereby improving the controllability and guidance of the fluid by correctly and effectively installing the guide plate at a special position (complex line type) of the ship; improve the performance of the structure, reduce resistance and energy consumption, thereby reducing the fuel consumption of the ship, and help improve the fuel efficiency of the ship and reduce operating costs; improve maneuverability, reduce the risk of shaking and rolling, thereby improving the stability of the ship, especially under harsh marine conditions; improve the mixing and dispersion of liquids, help reduce the concentration of suspended matter, improve water quality, and reduce environmental impacts, such as sediment and pollutant diffusion in rivers and oceans; improve the stability of the structure and reduce the risk of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the installation of a segmented reverse-state guide plate disclosed in this application.

[0025] Figure 2 A schematic diagram of a guide plate component adding excess material card disclosed in this application.

[0026] Figure 3 This is a specific installation diagram of a guide plate part disclosed in this application. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] exist Figure 1-Figure 3 In the embodiment shown, a method for installing a guide plate on a ship is provided, the method comprising: step 1, setting the allowance of guide plate parts; step 2, confirming the actual guide plate processing line type and size on site; step 3, determining the opening position of the guide plate on the outer plate; step 4, selecting the positioning sequence, method and precautions of the guide plate according to the on-site segmentation state (normal or reverse state); step 5, trimming and adding the allowance when cutting and blanking according to requirements; step 6, selecting the installation sequence, method and precautions of the guide plate according to the on-site segmentation state (normal or reverse state); step 7, determining the precision size of the guide plate according to the laser theodolite.

[0029] The process will be described step by step with examples below:

[0030] Step 1: Set the allowance for the guide plate parts. Before cutting the parts, add 50mm allowance along the edge of the parts (see Figure 2 ) to allow for sufficient cutting margins for subsequent dimensional adjustments on site. It is understandable that during the manufacturing and installation process, the dimensions of the hull structure may change due to a variety of factors (such as measurement errors, material deformation, etc.). Reserving sufficient margins can allow for necessary adjustments on site, ensuring that the deflector can accurately adapt to its installation position, helping to resolve mismatch problems that may be encountered during installation, thereby avoiding remanufacturing or large-scale modifications, saving costs and time.

[0031] Step 2: Confirm the actual processing size of the guide plate after cutting, and whether the processing line type is in place, and use measuring tools to check whether the cutting information is consistent with the actual object; check whether the processing line type is in place through the sample and sample box. If there is a problem with the processing and cutting, the overall size of the parts can be inspected to be within 5mm. If it exceeds 10mm, it is necessary to consider the actual situation on site to distinguish; if there is a problem with the processing line type, check whether the line type of the parts fits the sample and sample box in the free state. If there is a mismatch, it needs to be rectified in time to achieve the expected state.

[0032] Specifically, first use measuring tools (such as calipers, micrometers, etc.) to check whether the actual size of the deflector parts is consistent with the design cutting information to ensure that there is no error exceeding the specified allowable range (within 5mm is acceptable, and more than 10mm requires special attention and may need to be adjusted according to the actual situation on site). At the same time, use templates and sample boxes - these are prefabricated standard molds used to simulate the specific parts of the deflector installation - to check whether the line shape of the deflector is accurately in line with the predetermined design. If the deflector cannot fully fit the template and sample box in the free state, it means that there is a deviation in the line shape, and it must be adjusted or reprocessed to ensure that the accuracy and functionality required by the design can be achieved during installation.

[0033] Step 3, determine the opening position of the guide plate on the outer plate, according to the outer plate opening polyester paper provided by the hull lofting, after calibrating the relative rib position line, knock the sample punch along the edge of the polyester paper opening on the outer plate to leave marks. If it is a straight edge, you can knock it every 50mm; if it is a non-straight edge, you need to knock it every 10mm. After all the sample punches are knocked, the edge contour line is marked as the cutting line. The construction personnel need to confirm whether to cut the inner ring or the outer ring, and then carry out the cutting operation.

[0034] Dacron paper is a tough synthetic material used to create temporary templates or markings in this step because it can withstand greater physical pressure without breaking. During the hull lofting process, this Dacron paper is pre-marked with the openings and specific contours of the deflectors, then placed on the ship's outer plate and used as a guide template for precise cutting and processing, ensuring that the openings are exactly the same as the design drawings.

[0035] Step 4: Select the positioning sequence, method and precautions of the guide plate according to the on-site segmentation status (normal or reverse). The staff needs to pull and measure the distance between the bow thruster cylinder and the outer plate to ensure that the actual size is consistent with the design theoretical size. The 2m baseline is used as the reference line. The outer plate opening edge line and the thruster cylinder are marked according to the electronically calculated size. The upper and lower openings of the parts are trimmed and cut at the same time as step 5. The parts are hoisted and segmented in a clockwise direction for positioning welding and restraint welding by manual arc welding.

[0036] It should be noted that in shipbuilding, "section state (normal or reverse)" refers to the different ways of assembling sections of the hull during the construction process, which usually involves how different parts of the hull structure are decomposed, manufactured and finally assembled according to design and construction requirements. The selection of section state affects the positioning order and installation method of the guide vane and other structures, as explained below:

[0037] Normal: refers to the hull structure sections being assembled in the normal order and direction. In this state, the assembly order and direction of each part are consistent with those shown on the design drawings, which is the most common assembly method.

[0038] Reverse state: refers to the situation that in certain specific cases, some sections of the hull structure may need to be assembled in reverse order or in reverse order. This usually occurs when the docking structure is complex or the space is limited, and the assembly sequence needs to be adjusted to adapt to the actual construction environment or optimize the process flow.

[0039] Depending on the status of the sections, the installation order and method of the deflectors also need to be adjusted accordingly. In normal conditions, the installation of the deflectors may follow standard, sequential steps that are easy to predict and implement. In reverse conditions, due to the reversal of some assembly sequences and directions, more customized processing may be required, such as adjusting the installation position or sequence of the deflectors to ensure that they are correctly installed on the hull and properly docked with other structural components. Through this process, the accuracy of the ship's structural installation and the integrity of the structure are guaranteed, while also improving construction efficiency and quality.

[0040] Step 5: According to the size requirements of the drawing, the additional allowance size should be added when cutting and cutting. The specific size should be based on the gap between the bow thruster and the outer plate on site. The specific operation content is complementary to step 4.

[0041] In this step, the staff will adjust the margin added during cutting according to the size requirements on the design drawings to ensure that these dimensions meet the specific requirements of the gap between the bow thruster and the outer plate in the actual hull structure. The specific operation includes measuring and trimming the margin to ensure that the deflector parts can be accurately installed in the predetermined position, while ensuring that there is no error in the joint between the outer plate and the bow thruster cylinder.

[0042] Step 6. Select the installation sequence, method and precautions of the guide plate according to the on-site segmentation status (normal or reverse state). First, perform welding according to the position sequence determined in step 4 to ensure that the position of each guide plate component is correct. Before welding, it is necessary to confirm whether the groove form between the guide plate parts, the thrust cylinder and the outer plate is correct, and the fillet weld form is used as the welding reference. During the welding operation, if there is sufficient space on site, a semi-automatic welding gun can be used for welding to improve efficiency and welding quality; in narrow spaces or difficult-to-access angles, manual arc welding should be used to ensure the accuracy and strength of the weld.

[0043] Step 7. Determine the precision size of the guide plate using the laser theodolite, and confirm by marking points on the guide plate in sequence, with 100 mm as a level. The data of each level is based on the data pulled from the 3D model, and the X-axis, Y-axis, and Z-axis data are compared. After the precision status is confirmed, proceed to the subsequent polishing and grinding process.

[0044] The specific operation is as follows: First, use a laser theodolite to mark points on the guide plate at intervals of 100 mm, and these points are used as the basis for measurement. Then, the data obtained from these field measurements (X-axis, Y-axis, and Z-axis coordinate values) are compared with the data in the pre-prepared 3D model to verify the accuracy of the position and size of the guide plate. After confirming that the various parameters of the guide plate meet the preset accuracy requirements, the subsequent polishing and grinding processes are entered, which are aimed at improving the surface quality of the guide plate and ensuring its functionality and aesthetics.

[0045] The above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A method for installing a guide plate on a ship, It is characterized in that The method comprises the following steps: Set the allowance for the guide plate parts to ensure that there is enough cutting allowance for size adjustment on site; Confirm the actual processing size and line shape of the guide plate after cutting on site, use measuring tools to check whether the cutting information is consistent with the actual object, and use samples and sample boxes to check whether the processing line shape is in place; Determine the opening position of the guide plate on the outer plate, and after calibrating the relative rib position line according to the outer plate opening polyester paper provided by the hull lofting, punch and leave marks along the edge of the polyester paper opening on the outer plate, and then mark the edge contour line as the cutting line for cutting; Select the positioning sequence, method and precautions of the guide plates according to the on-site segmentation status; Add margin when cutting materials according to requirements to ensure the size and line shape are in place; Complete the deflector welding process, confirm the groove form of the deflector parts, the thrust cylinder and the outer plate, and weld based on the fillet weld form; The precision dimensions of the guide plate are determined by the laser theodolite, compared with the 3D model data, and the polishing and grinding process is started after the precision status is confirmed.

2. A method for installing a guide plate on a ship according to claim 1, It is characterized in that When setting the allowance for the guide plate parts, add 50mm of allowance along the edge of the part in advance.

3. A method for installing a guide plate on a ship according to claim 1, It is characterized in that When confirming the actual processing size of the guide plate on site, the overall size of the parts should be accepted within 5mm. If it exceeds 10mm, it needs to be identified and handled according to the actual situation on site.

4. A method for installing a guide plate on a ship according to claim 1, It is characterized in that When determining the opening position of the guide plate on the outer plate, a sample punch is made every 10 mm for the non-straight edge and every 50 mm for the straight edge.

5. A method for installing a guide plate on a ship according to claim 1, It is characterized in that When positioning the guide plate, based on the distance between the edge of the bow thruster cylinder and the outer plate, take the 2m baseline as the reference line, draw the outer plate opening edge line and the thruster cylinder according to the electronically calculated dimensions, and at the same time trim the upper and lower opening allowances of the parts.

6. A method for installing a guide plate on a ship according to claim 1, It is characterized in that During the installation and welding of the guide plate, semi-automatic welding guns are used in open areas, while manual arc welding is used in narrow areas.

7. A method for installing a guide plate on a ship according to claim 1, It is characterized in that In the process of determining the precise size of the guide plate, each 100 mm is a level, and the accuracy is confirmed by comparing the X-axis, Y-axis, and Z-axis data based on the 3D model data.

8. A method for installing a guide plate on a ship according to claim 1, It is characterized in that After the guide plate is installed and welded, a comprehensive inspection is carried out.

9. A method for installing a guide plate on a ship according to claim 1, It is characterized in that After the polishing and grinding processes are completed, the guide plate is subjected to anti-corrosion treatment.

Images