Method for measuring surface roughness of antifouling paint of outer plate

Abstract

The invention discloses a method for measuring the surface roughness of antifouling paint of an outer plate, and belongs to the technical field of ship construction. The measuring method comprises the following steps: dividing a portside vertical ship bottom into a plurality of first primary areas along the length direction of a ship body; the starboard vertical ship bottom is divided into a plurality of second primary areas in the length direction of the ship body; each first primary area is divided into a plurality of first secondary areas in the height direction of the ship body; each second primary area is divided into a plurality of second secondary areas in the height direction of the ship body; a first calibration number of points are uniformly distributed and selected for each first secondary area, roughness is measured, an average value is obtained, a second calibration number of points are uniformly distributed and selected for each second secondary area, roughness is measured, and an average value is obtained; taking ten roughness measurement values in a set range of each point, and taking an average value as a measurement value of the point; and recording the measurement values of all the secondary areas, and forming a report. The surface state after construction can be known conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of shipbuilding, and in particular to a method for measuring the surface roughness of an outer plate antifouling coating. Background Art

[0002] Ship is a general term for various vessels, and is a man-made means of transportation that mainly operates in geographical waters. The hull of a ship is divided into the main body and the superstructure. The main body generally refers to the part below the upper deck, which is a hollow body with a specific shape surrounded by the hull (bottom and side) and the upper deck. It is a key part to ensure that the ship has the required buoyancy, navigation performance and hull strength. The hull is generally used to arrange power units, load cargo, store fuel and fresh water, and arrange various other cabins. The outer hull plate includes the port vertical bottom, the starboard vertical bottom and the flat bottom.

[0003] Among them, existing ships generally need to spray paint during the processing or post-maintenance of the hull outer plate, and form an anti-fouling coating on the hull outer plate to improve the ship's anti-fouling and anti-corrosion capabilities. However, there is currently no method to measure the surface roughness of the anti-fouling coating in the outer plate area, resulting in the inability to understand the surface status of the outer plate.

[0004] Therefore, it is urgent to provide a method for measuring the surface roughness of the outer plate antifouling coating to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a method for measuring the surface roughness of an outer plate antifouling coating, which is helpful for understanding the surface state after construction and providing a reference for subsequent operation or subsequent ship construction.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] The measurement method of surface roughness of the outer plate antifouling coating includes:

[0008] S1. Divide the vertical bottom of the port side into several first-level areas along the length direction of the hull; divide the vertical bottom of the starboard side into several second-level areas along the length direction of the hull;

[0009] S2, dividing each first level region into a plurality of first level regions along the height direction of the hull; dividing each second level region into a plurality of second level regions along the height direction of the hull;

[0010] S3, evenly selecting a first calibrated number of points for each first and second-level region to measure the roughness and take an average value, and evenly selecting a second calibrated number of points for each second and second-level region to measure the roughness and take an average value;

[0011] S4, taking ten roughness measurement values ​​within the set range of each point and taking the average value as the measurement value of the point;

[0012] S5. Record the measurements of all secondary areas and prepare a report.

[0013] As an optional solution for measuring the surface roughness of the outer plate antifouling coating, in step S1, the straight bottom is divided into a number of third-level regions along the length direction of the hull, and the number of the first-level region, the second-level region and the third-level region is the same.

[0014] As an optional scheme for measuring the surface roughness of the outer plate antifouling coating, the first primary area, the second primary area and the third primary area are divided into ten equal parts.

[0015] As an optional scheme for measuring the surface roughness of the outer plate antifouling coating, in step S2, each third-level area is symmetrically divided into a left area and a right area along the width direction of the hull, and the left area and the right area are both divided into a number of third-level areas along the width direction of the hull, and the number of the first-level area, the second-level area and the third-level area is the same.

[0016] As an optional scheme for measuring the surface roughness of the outer plate antifouling coating, the first secondary area, the second secondary area and the third secondary area are divided into three equal parts.

[0017] As an optional solution for measuring the surface roughness of the outer plate antifouling coating, in step S3, a surface roughness measuring instrument is used for detection.

[0018] As an optional solution for measuring the surface roughness of the outer plate antifouling coating, in step S5, the maximum value, the minimum value and the average value of the roughness are selected in the report.

[0019] As an optional scheme for measuring the surface roughness of the outer plate antifouling coating, when the maximum value of the roughness is less than the reference value, it is calibrated that the surface roughness of the outer plate antifouling coating of the hull meets the requirements.

[0020] As an optional method for measuring the surface roughness of the outer plate antifouling coating, the reference value is Ra120.

[0021] As an optional method for measuring the surface roughness of the outer plate antifouling coating, when the maximum value of the roughness is greater than the reference value, the fuel consumption of the hull is calibrated to exceed the design requirement.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The surface roughness measurement method of the outer plate antifouling coating provided by the present invention divides the port side vertical bottom into several first-level areas along the length direction of the hull; divides the starboard side vertical bottom into several second-level areas along the length direction of the hull; divides each first-level area into several first-level areas along the height direction of the hull; divides each second-level area into several second-level areas along the height direction of the hull; evenly selects a first calibrated number of points for each first-level and second-level area to measure the roughness and take the average value, and evenly selects a second calibrated number of points for each second-level area to measure the roughness and take the average value; takes ten roughness measurement values ​​within the set range of each point and takes the average value as the measurement value of the point; records the measurement values ​​of all second-level areas and forms a report. The surface roughness of the antifouling coating is based on the final presentation of the roughness of the base steel plate combined with the roughness of the primer. The surface roughness measurement method of the outer plate antifouling coating is conducive to understanding the surface state of the outer plate, more comprehensively reflecting the actual level of the roughness of the outer plate antifouling coating, and effectively evaluating the surface roughness state of the outer plate antifouling coating after construction. The friction resistance between the coating surface and the water flow will affect the energy consumption and carbon emissions of cruise ships. The surface roughness measurement method of the outer plate antifouling coating can be used to evaluate the energy consumption and carbon emissions of cruise ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 Flow chart of the method for measuring the surface roughness of the outer plate antifouling coating in an embodiment of the present invention;

[0026] Figure 2 Schematic diagram of the vertical bottom of the port side in an embodiment of the present invention;

[0027] Figure 3 Schematic diagram of the vertical bottom of the starboard side in an embodiment of the present invention;

[0028] Figure 4 Schematic diagram of a flat ship bottom in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In order to facilitate understanding of the surface state after construction and provide reference for subsequent operation or subsequent ship construction, this embodiment provides a method for measuring the surface roughness of the outer plate antifouling coating. Figures 1 to 4 The specific contents of this embodiment are described in detail. It should be noted that the length direction mentioned in this embodiment is Figure 2 The X direction in this embodiment is Figure 3 The Z direction in this embodiment is Figure 4 in the Y direction.

[0034] The surface roughness measurement method of the outer plate antifouling coating in this embodiment includes: S1, dividing the port side vertical bottom into several first-level areas along the length direction of the hull; dividing the starboard side vertical bottom into several second-level areas along the length direction of the hull; S2, dividing each first-level area into several first-level areas along the height direction of the hull; dividing each second-level area into several second-level areas along the height direction of the hull; S3, evenly selecting a first calibrated number of points for each first-level and second-level area to measure the roughness and take the average value, evenly selecting a second calibrated number of points for each second-level area to measure the roughness and take the average value, S4, taking ten roughness measurement values ​​within a set range of each point and taking the average value as the measurement value of the point, S5, recording the measurement values ​​of all second-level areas and forming a report.

[0035] In short, in the surface roughness measurement method of the outer plate antifouling coating provided by the present invention, the surface roughness of the antifouling coating is based on the final presentation of the roughness of the base steel plate combined with the roughness of the primer. The surface roughness measurement method of the outer plate antifouling coating is helpful to understand the surface state of the outer plate, more comprehensively reflect the actual level of the roughness of the outer plate antifouling coating, and effectively evaluate the surface roughness state of the outer plate antifouling coating after construction. The friction resistance between the coating surface and the water flow will affect the energy consumption and carbon emissions of the cruise ship. The surface roughness measurement method of the outer plate antifouling coating can be used to evaluate the energy consumption and carbon emissions of the cruise ship.

[0036] It can be understood that the number of the first and second level regions and the number of the second level regions are determined according to the total height of the hull. The higher the hull is, the more the number of the first and second level regions and the second level regions along the height direction is. No excessive restrictions are made here. For example, the first calibration number and the second calibration number are the same, both ten.

[0037] Further, in step S1, the flat bottom is divided into a plurality of third primary regions along the length direction of the hull, and the number of the first primary region, the second primary region and the third primary region is the same. The number of primary regions can be determined according to the total length of the hull. The longer the hull, the more primary regions along the length direction, and no excessive restrictions are made here.

[0038] Exemplarily, the first level region, the second level region and the third level region are each divided into ten equal parts.

[0039] Further, in step S2, each third-level region is symmetrically divided into a left area and a right area along the width direction of the hull, and the left area and the right area are both divided into a number of third-level regions along the width direction of the hull, and the number of the first-level region, the second-level region and the third-level region is the same. The number of third-level regions can be determined according to the total width of the hull. The wider the hull, the more third-level regions there are along the width direction, and no excessive restrictions are made here.

[0040] Exemplarily, the first secondary region and the second secondary region are each divided into three equal parts, and the third secondary region is divided into six equal parts.

[0041] Furthermore, in step S3, a surface roughness measuring instrument is used for detection. The surface roughness measuring instrument can measure the roughness of various parts surfaces, including planes, inclined surfaces, outer cylindrical surfaces, inner hole surfaces, deep groove surfaces and bearing raceways, etc., to achieve multifunctional precision measurement of surface roughness. The working principle of the surface roughness measuring instrument is mainly based on the stylus method (needle tracing method). The instrument contains a tiny diamond stylus with a very small radius of curvature at the tip of the stylus. During measurement, the stylus contacts the measured surface vertically, and the sensor is dragged at a certain speed by the driver. Due to the peaks and valleys of the measured surface profile, the stylus will move up and down when sliding on the measured surface. This movement causes the magnetic core to move up and down synchronously, thereby changing the inductance of the two differential inductor coils surrounding the outside of the magnetic core. After this change is amplified and phase-sensitively detected by an electronic device, a signal that can represent the magnitude and direction of the stylus displacement is obtained.

[0042] Furthermore, in step S5, the maximum value, minimum value and average value of the roughness are selected in the report, and the construction personnel do not need to compare the roughness measurement values ​​of the secondary areas one by one, which helps the construction personnel to quickly obtain data.

[0043] Further, when the maximum value of the roughness is less than the reference value, it is determined that the surface roughness of the antifouling coating of the outer plate of the hull meets the requirements. The reference value can be determined according to actual design requirements. For example, the reference value is Ra120.

[0044] Furthermore, when the maximum value of the roughness is greater than the reference value, the fuel consumption of the hull is calibrated to exceed the design requirements. Since the maximum value of the roughness is greater than the reference value, the friction resistance between the coating surface and the water flow will increase, which will affect the energy consumption and carbon emissions of the cruise ship. When the maximum value of the roughness is greater than the reference value, the construction personnel can reduce the maximum value of the roughness by grinding the coating surface, thereby reducing fuel consumption.

[0045] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for measuring the surface roughness of an outer plate antifouling coating, characterized in that: include: S1. Divide the vertical bottom of the port side into several first-level areas along the length direction of the hull; divide the vertical bottom of the starboard side into several second-level areas along the length direction of the hull; S2, dividing each first level area into a plurality of first level and second level areas along the height direction of the hull; Dividing each second primary area into a plurality of second secondary areas along the height direction of the hull; S3, evenly selecting a first calibrated number of points for each first and second-level region to measure the roughness and take an average value, and evenly selecting a second calibrated number of points for each second and second-level region to measure the roughness and take an average value; S4, taking ten roughness measurement values ​​within the set range of each point and taking the average value as the measurement value of the point; S5. Record the measurements of all secondary areas and prepare a report.

2. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 1, characterized in that: In step S1, the flat bottom is divided into a plurality of third-level regions along the length direction of the hull, and the number of the first-level region, the second-level region and the third-level region is the same.

3. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 2, characterized in that: The first-level region, the second-level region and the third-level region are divided into ten equal parts.

4. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 2, characterized in that: In step S2, each third-level area is symmetrically divided into a left area and a right area along the width direction of the hull, and the left area and the right area are both divided into several third-level areas along the width direction of the hull, and the number of first-level areas, second-level areas and third-level areas is the same.

5. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 4, characterized in that: The first-level second-level area, the second-level second-level area, and the third-level second-level area are all divided into three equal parts.

6. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 4, characterized in that: In step S3, a surface roughness measuring instrument is used for detection.

7. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 6, characterized in that: In step S5, the maximum value, minimum value and average value of the roughness are selected in the report.

8. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 7, characterized in that: When the maximum value of the roughness is less than the reference value, it is determined that the surface roughness of the antifouling coating on the outer plate of the hull meets the requirements.

9. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 8, characterized in that: The reference value is Ra120.

10. The method for measuring the surface roughness of the outer plate antifouling coating according to claim 7, characterized in that: When the maximum value of the roughness is greater than the reference value, the fuel consumption of the hull is calibrated to exceed the design requirement.

Images