A method of installing a windlass base

Abstract

The application provides a method for installing an anchor winch base, which first comprises manufacturing an anchor winch base composed of a first base and a second base; then, installing the second base on a second surface of a ship deck during a reverse state construction stage of a ship section piece; and finally, installing the first base on a first surface of the ship deck during a normal state construction stage of the ship section piece. By moving the installation of the anchor winch base to the stage of the ship section piece, installing the lower base during the reverse state construction stage of the ship section piece, adjusting the installation of the second base from overhead welding to normal welding, and further reducing the erection of a scaffold platform, the installation environment of the anchor winch base is improved, and the installation efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of shipbuilding, and in particular to a method for installing an anchor winch base. Background Technology

[0002] Anchor winches, also known as vertical anchor winches, are an important piece of equipment in ship deck machinery, mainly used for auxiliary maneuvering when ships are anchoring and leaving or berthing at docks. During operation, ships frequently need to be moored at docks or anchorages, utilizing the anchor's gripping force and the weight of the anchor and anchor chain to overcome external forces such as wind and currents, thereby maintaining the ship's relative stability. Therefore, anchor winches are the primary power source for ship mooring, and some anchor winches also function as mooring winches, serving as the power source for ship mooring at docks.

[0003] Given the stress characteristics of vertical anchor winches, the installation of existing anchor winch bases is quite complex, thus placing higher demands on the installation accuracy of the anchor winch bases on the deck, such as parallelism and verticality. Traditionally, anchor winch bases are installed on-site after the hull structure sections or mega-sections in that area are joined. However, the installation of the lower base below deck requires scaffolding for overhead welding, resulting in limited working space and a poor working environment, leading to a huge amount of welding work and severely affecting the welding quality of the lower base installation. Furthermore, after the welding work on the upper base is completed, a manual grinding step is required on the surface of the upper base, which is time-consuming, labor-intensive, and inefficient.

[0004] Therefore, how to provide a method for installing anchor winch bases that can improve the installation quality and efficiency of anchor winch base installation without affecting the installation accuracy has become an urgent problem to be solved in this field. Summary of the Invention

[0005] The purpose of this application is to provide a method for installing an anchor winch base, which can improve the installation quality and efficiency of the anchor winch base without affecting the installation accuracy.

[0006] In a first aspect, embodiments of this application provide a method for installing an anchor winch base, comprising:

[0007] 1) Provide an anchor winch base, the anchor winch base comprising a first base and a second base;

[0008] 2) The second base is installed during the reverse construction stage of the ship's segmented hull, and the second base is installed on the second surface of the ship's deck;

[0009] 3) The first base is installed during the normal construction stage of the ship's segmented hull. The first base is installed on the first surface of the ship's deck and corresponds to the installation position of the second base; wherein the first surface and the second surface are two opposing surfaces of the ship's deck.

[0010] In one possible implementation, step 2) specifically includes:

[0011] 2.1) During the segmented sheet body reverse construction stage, an installation area is set on the second surface, and the installation area meets the preset surface accuracy requirements;

[0012] 2.2) The second base is installed in the installation area, and the second base and the second surface are welded and fixed by an even number of welders symmetrically welding.

[0013] In one possible implementation, the first base and the first surface are welded and fixed together by an even number of welders symmetrically performing welding.

[0014] In one possible implementation, the first base includes a first panel, a first web, and a first elbow plate, one end of the first web is fixedly connected to the first surface, and the end of the first web away from the first surface is fixedly connected to the first panel; the second base includes a second panel, a second web, and a second elbow plate, one end of the second web is fixedly connected to the second surface, and the end of the second web away from the second surface is fixedly connected to the second panel.

[0015] In one possible implementation, after the second base is welded and fixed to the second surface, the method further includes a step of measuring and adjusting the levelness and flatness of the second panel so that the levelness and flatness of the second panel are within a preset threshold range.

[0016] In one possible implementation, the preset threshold range for the levelness and flatness of the second panel is 0 mm to 3 mm.

[0017] In one possible implementation, before the first base is welded and fixed to the first surface, the first base uses the plane where the second panel is located as the mounting reference plane, and keeps the first panel parallel to the second panel.

[0018] In one possible implementation, after the first base is welded and fixed to the first surface, the method further includes a step of measuring and adjusting the levelness and flatness of the first panel so that the levelness and flatness of the first panel are within a preset threshold range.

[0019] In one possible implementation, the step of adjusting the levelness and flatness of the first panel specifically includes machining and polishing the surface of the first panel until the levelness and flatness of the first panel are within a preset threshold range.

[0020] In one possible implementation, the preset threshold range for the horizontality of the first panel is 0 mm to 1 mm, and the preset threshold range for the flatness of the first panel is 0 mm to 0.05 mm.

[0021] Compared with the prior art, the beneficial effects of this application are at least as follows:

[0022] This application provides a method for installing an anchor winch base. The method first involves fabricating an anchor winch base consisting of a first base and a second base. Then, during the reverse construction phase of the ship's hull sections, the second base is installed on the second surface of the ship's deck. Finally, during the normal construction phase of the ship's hull sections, the first base is installed on the first surface of the ship's deck. By moving the installation of the anchor winch base to the hull section stage, and utilizing the reverse construction phase of the ship's hull sections to install the lower base, the installation of the second base is changed from overhead welding to normal welding. This reduces the need for scaffolding platforms, improves the construction environment for the anchor winch base installation, and increases installation efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart illustrating the steps of an anchor winch base installation method according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the structure of an anchor winch base according to an embodiment of this application.

[0026] Figure 3 This is a schematic cross-sectional view of an anchor winch base according to an embodiment of this application.

[0027] Figure 4 This is a top view of a first base on a first surface according to an embodiment of this application.

[0028] Figure 5 This is a top view of a second base on a second surface according to an embodiment of this application.

[0029] Illustration:

[0030] 100 First base; 110 First panel; 120 First web; 130 First elbow plate; 131 First elbow plate panel; 200 Second base; 210 Second panel; 211 Adjusting shim; 220 Second web; 230 Second elbow plate; 231 Second elbow plate panel; 300 Ship deck; 301 First surface; 302 Second surface. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or operated through other different specific embodiments, and various details in this application can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. 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; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first" and "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0033] The installation of existing vertical anchor winch bases is quite complex, which places higher demands on the installation accuracy, such as the parallelism and perpendicularity of the ship's deck surface. Traditionally, the on-site installation method for anchor winch bases involves assembling the main hull sections or completing the mega-sections in that area before installing the base. This means that the lower base, installed below deck, requires overhead welding work using scaffolding, resulting in limited working space and a poor working environment. This significantly increases the welding difficulty and workload of the lower base installation, and may even affect the welding quality.

[0034] Based on the above analysis, this application provides a method for installing an anchor winch base, which moves the installation of the anchor winch base to the segmented hull stage. By utilizing the reverse construction stage of the ship's segmented hulls to install the lower base, the installation of the lower base is changed from overhead welding to positive welding, thereby reducing the need for scaffolding platforms, improving the construction environment for the anchor winch base installation, and increasing installation efficiency.

[0035] According to one aspect of this application, a method for installing an anchor winch base is provided, see [link to relevant documentation]. Figure 1 andFigure 2 The installation process includes the following steps:

[0036] First, proceed with S1, providing an anchor winch base. The anchor winch base includes a first base 100 and a second base 200, wherein the first base 100 includes a first panel 110, a first web 120 and a first elbow plate 130, and the second base 200 includes a second panel 210, a second web 220 and a second elbow plate 230.

[0037] In one embodiment, the first panel 110 is annular, and the first web 120 is cylindrical. The top of the cylindrical first web 120 is welded to the bottom of the annular first panel 110, and the center of the first web 120 is coaxial with the center of the first panel 110. A plurality of first elbow plates 130 are spaced apart on the outer side of the cylindrical sidewall of the first web 120 and are symmetrically arranged in pairs about the central axis of the first web 120. The first panel 110, the first web 120, and the plurality of first elbow plates 130 together constitute the first base 100 of the anchor winch base.

[0038] The second panel 210 is annular, and the second web 220 is cylindrical. The bottom end of the cylindrical second web 220 is welded to the top end of the annular second panel 210, and the center of the second web 220 is coaxial with the center of the second panel 210. Multiple second elbow plates 230 are spaced apart on the outer side of the cylindrical sidewall of the second web 220. Some of the second elbow plates 230 are symmetrically arranged in pairs around the central axis of the second web 220 and are welded to the second web. The second panel 210, the second web 220, and the multiple second elbow plates 230 cooperate to form the second base 200 of the anchor winch base.

[0039] Preferably, in this embodiment, the surface flatness of the first panel 110 is required to be less than 0.5 mm, the surface roughness is required to be less than 12.5 μm, and the surface flatness of the second panel 210 is required to be less than 1.5 mm.

[0040] Preferably, the first base 100 further includes a first elbow plate panel 131 welded to the first elbow plate 130, and the second base 200 further includes a second elbow plate panel 231 welded to the second elbow plate 230.

[0041] In one embodiment, after the anchor winch base is manufactured, the process further includes marking the first base 100 and the second base 200 to provide positioning marks for subsequent installation of the first base 100 and the second base 200 on the ship deck 300. Preferably, forward, aft, left, and right directional marks can be made on the first base 100 and the second base 200 respectively using a slingshot.

[0042] Then, proceed to S2, during the reverse construction phase of the ship's segmented hull, to install the second base 200, see [link to relevant documentation]. Figure 3 and Figure 5 This allows the second base 200 to be installed and fixed on the second surface 302 of the ship deck 300. The second surface 302 of the ship deck 300 is fixedly connected to the end of the second web plate 220 furthest from the second panel 210.

[0043] For ease of description, the first surface 301 is defined as the surface corresponding to the upper surface of the ship deck 300 when the ship section slabs are in a normal state, and conversely, the second surface 302 is defined as the surface corresponding to the lower surface of the ship deck 300 when the ship section slabs are in a normal state. That is to say, in the inverse state construction stage of the ship section slabs, the second surface 302 of the ship deck 300 will face upwards, while the first surface 301 will face downwards. Thus, when the second base 200 is installed, the second base 200 can be directly stabilized on the second surface 302 under its own weight, without the need to erect scaffolding. Construction workers can also directly fix the second base 200 to the ship deck 300 on the second surface 302, greatly improving the installation environment and reducing the installation difficulty of the second base 200.

[0044] In one embodiment, the specific steps for installing the second base 200 may include:

[0045] First, during the reverse construction phase of the ship's segmented hull, an installation area is pre-defined on the second surface 302 of the ship's deck 300, and the surface of the installation area is measured for accuracy. If the surface accuracy does not meet the installation requirements of the second base 200, the surface can be corrected until the surface of the installation area meets the preset accuracy requirements.

[0046] Preferably, before hoisting the second base 200 to the mounting area of ​​the second surface 302, the method further includes using a punch to make directional marks (e.g., front, back, left, right, etc.) on the second surface 302 and the first surface 301 corresponding to the mounting area. Thus, when the second base 200 is installed, the directional marks on the second surface 302 can correspond to the directional marks set on the second base 200, so as to improve the installation position accuracy of the second base 200.

[0047] Then, the second base 200 is welded and fixed to the second surface 302 in the installation area. At this time, the construction personnel can use a forward welding posture to weld and fix the second base 200 to the second panel 210, avoiding overhead welding. The welding method adopts the principle of symmetrical welding with low current by an even number of welders to control the amount of welding and installation deformation of the second base 200 and prevent deviations in the installation accuracy of the second base 200.

[0048] Preferably, after the second base 200 is welded and fixed to the second surface 302, the distance between the center of the second web plate 220 and the center line of the segmented hull, as well as the distance between the second panel 210 and the second surface 302, do not exceed 1 mm.

[0049] Preferably, after the second base 200 is welded and fixed to the second surface 302, the method further includes a step of measuring and adjusting the levelness and flatness of the second panel 210 to ensure that the levelness and flatness of the second panel 210 are within a preset threshold range. In this embodiment, the preferred preset threshold range for the levelness and flatness of the second panel 210 is 0mm to 3mm. When the levelness or flatness of the second panel 210 exceeds the maximum threshold range of 3mm, an adjusting shim 211 is used to ensure that the contact surface between the adjusting shim and the second panel 210 (or the adjusting shim 211) remains horizontal during the subsequent installation of the vertical anchor winch equipment, thus preventing tilting after the vertical anchor winch equipment is installed. The adjusting shim 211 is welded to the surface of the second panel 210 on the side away from the second web plate 220.

[0050] Finally, proceed to S3, during the normal construction phase of the ship's segmented hulls, to install the first base 100, see [link to relevant documentation]. Figure 3 and Figure 4 The first base 100 is fixed to the first surface 301 of the ship deck 300, that is, the installation position of the first base 100 on the first surface 301 is determined according to the direction marks made on the first base 100 and the first surface 301. The first surface 301 of the ship deck 300 is fixedly connected to the end of the first web plate 120 away from the first panel 110, and corresponds to the installation position of the second base 200.

[0051] In one embodiment, the first base 100 is welded to the first surface 301. The welding method also adopts the principle of symmetrical welding with small current by an even number of welders to control the amount of deformation of the first base 100 during installation and avoid the installation accuracy from exceeding the error range.

[0052] Preferably, before the first base 100 is welded and fixed to the first surface 301, the first base 100 uses the plane where the second panel 210 is located as the mounting reference plane, and the first panel 110 is parallel to the second panel 210.

[0053] Furthermore, after the first base 100 is welded and fixed to the first surface 301, the method further includes a step of measuring and adjusting the levelness and flatness of the first panel 110, so that the levelness and flatness of the first panel 110 are within a preset threshold range. For example, in this embodiment, the adjustment of the levelness and flatness of the first panel 110 can be carried out by mechanical grinding, and the specific grinding amount can be calculated based on the measurement results, until the levelness and flatness of the first panel 110 are within the preset threshold range.

[0054] Preferably, the horizontality preset threshold range of the first panel 110 is 0mm to 1mm, the flatness preset threshold range of the first panel 110 is 0mm to 0.05mm, and the grinding amount of the first panel 110 should preferably not exceed 4mm.

[0055] It should be noted that after the first base 100 and the second base 200 are processed, they are moved to the installation area of ​​the segmented body by hoisting. During the hoisting process, symmetrical hoisting horses are used to prevent deformation. This can control the deformation of the segment and the deformation of the first base 100 and the second base 200, ensuring that the first panel 110 and the second panel 210 mounted on the segmented body remain horizontal after the hull is installed.

[0056] Preferably, before installing the hoist, a reinforcing structure is also installed on the segmented panels to further prevent large deformation of the segmented panels during the hoisting process.

[0057] This application provides a method for installing an anchor winch base. The method first involves fabricating an anchor winch base consisting of a first base 100 and a second base 200. Then, during the reverse construction phase of the ship's hull sections, the second base 200 is installed on the second surface 302 of the ship's deck 300. Finally, during the normal construction phase of the ship's hull sections, the first base 100 is installed on the first surface 301 of the ship's deck 300. By moving the installation of the anchor winch base to the hull section stage, and utilizing the reverse construction phase of the ship's hull sections to install the base, the second base 200 is changed from overhead welding to normal welding, thereby reducing the need for scaffolding platforms, improving the construction environment for the anchor winch base installation, and increasing installation efficiency.

[0058] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A method for installing an anchor winch base, characterized in that, Includes the following steps: 1) Provide an anchor winch base, the anchor winch base comprising a first base and a second base; 2) The second base is installed during the reverse construction stage of the ship's segmented hull. The second base is installed on the second surface of the ship's deck. During the reverse construction stage of the ship's segmented hull, the second surface of the ship's deck faces upward. 3) The first base is installed during the normal construction stage of the ship's segmented hull. The first base is installed on the first surface of the ship's deck and corresponds to the installation position of the second base. During the normal construction stage of the ship's segmented hull, the first surface of the ship's deck faces upward; wherein, the first surface and the second surface are two opposite surfaces of the ship's deck. The first base includes a first panel, a first web, and a first elbow plate. One end of the first web is fixedly connected to the first surface, and the end of the first web away from the first surface is fixedly connected to the first panel. The second base includes a second panel, a second web, and a second elbow plate. One end of the second web is fixedly connected to the second surface, and the end of the second web away from the second surface is fixedly connected to the second panel. Before the first base is welded and fixed to the first surface, the first base uses the plane where the second panel is located as the mounting reference plane, and keeps the first panel parallel to the second panel.

2. The anchor winch base installation method according to claim 1, characterized in that, Step 2) specifically includes: 2.1) During the segmented sheet body reverse construction stage, an installation area is set on the second surface, and the installation area meets the preset surface accuracy requirements; 2.2) The second base is installed in the installation area, and the second base and the second surface are welded and fixed by an even number of welders symmetrically welding.

3. The anchor winch base installation method according to claim 1, characterized in that, The first base and the first surface are welded and fixed together by an even number of welders symmetrically welding.

4. The anchor winch base installation method according to claim 1, characterized in that, After the second base is welded and fixed to the second surface, the method further includes a step of measuring and adjusting the levelness and flatness of the second panel so that the levelness and flatness of the second panel are within a preset threshold range.

5. The anchor winch base installation method according to claim 4, characterized in that, The preset threshold range for the levelness and flatness of the second panel is 0mm to 3mm.

6. The anchor winch base installation method according to claim 1, characterized in that, After the first base is welded and fixed to the first surface, the method further includes a step of measuring and adjusting the levelness and flatness of the first panel so that the levelness and flatness of the first panel are within a preset threshold range.

7. The anchor winch base installation method according to claim 6, characterized in that, The steps of adjusting the levelness and flatness of the first panel specifically include machining and polishing the surface of the first panel until the levelness and flatness of the first panel are within a preset threshold range.

8. The anchor winch base installation method according to claim 7, characterized in that, The preset threshold range for the horizontality of the first panel is 0mm to 1mm, and the preset threshold range for the flatness of the first panel is 0mm to 0.05mm.

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