Method for installing a pod-type full-rotation rudder propeller device in a section

Abstract

The application discloses a method for installing a pod type full-rotation rudder propeller device on a total section, which comprises the following steps: 1) after welding of a section where the rudder propeller device is located is completed and precision detection is qualified, a flange cylinder assembly is installed on the section, and a reference line is drawn on the section; 2) a positioning reference line is drawn on the ground, and positioning installation of the section on the ground is completed by corresponding to the reference line on the section, the sections are aligned, and the total section is welded; 3) after welding of the total section is completed, reference positioning data on the total section is measured, and whether the deviation of the detected reference positioning data exceeds a set range is judged; 4) the rudder propeller device is hoisted to the flange cylinder assembly for positioning assembly; 5) the total section is hoisted to a dock for large closing welding; and 6) after welding of the total section is completed, each reference parameter on the total section is detected, and corresponding reference parameters on the dock or the berth are used for inspection and correction. By using the method, the total section integrity can be improved and the construction progress can be accelerated under the condition of ensuring the installation precision.

Description

Technical Field

[0001] This application relates to the technical field of shipbuilding, and more particularly to a method for installing a podded azimuth propeller assembly in a main section. Background Technology

[0002] At present, large marine engineering vessels and tugboats generally use electric propulsion devices, and most of them are equipped with two or more azimuth propellers. However, in the construction of conventional ship products, podded azimuth propellers (hereinafter referred to as pods) are installed after being mounted in the dock or slipway, which leads to the following problems: (1) The timing of pod installation is limited by the progress of hull mounting, the installation requirements are high, and collision damage is easy to occur; (2) The installation environment in the dock or slipway is poor, and it is carried out simultaneously with other operations, which makes it easy for the installation accuracy to deviate and fail to meet the installation requirements; (3) The engine installation cycle is long, which slows down the overall installation progress of the ship. Summary of the Invention

[0003] The purpose of this application is to provide a method for installing a podded azimuth propeller device in the main section, which can solve the above-mentioned problems existing in the prior art. By installing the pod in the main section, it is ensured that the pod is completely installed in the section assembly stage with the required accuracy, thereby improving the integrity of the main section and greatly shortening the shipbuilding cycle.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] On the one hand, a method for installing a podded azimuth propeller assembly in a main section is provided, including the following steps: 1) After the welding of the section where the propeller assembly is located is completed and the accuracy test is qualified, a flange cylinder assembly is installed on the section, and a reference line is drawn on the section; 2) A positioning reference line is drawn on the ground, and the section is positioned and installed on the ground in accordance with the reference line on the section, and each section is aligned and welded to form the main section; 3) After the main section is welded, the reference positioning data on the main section is measured, and it is determined whether the deviation of the detected reference positioning data exceeds the set range. If it does not exceed the set range, the main section is judged to be welded and the main section is fire-engineered; 4) The propeller assembly is hoisted onto the flange cylinder assembly for positioning and assembly; 5) The main section is hoisted to the dock or slipway for final welding; 6) After the main section is welded, the reference parameters on the main section are tested, and the corresponding reference parameters on the dock or slipway are used for inspection and correction.

[0006] Optionally, in step 1), after the section completion accuracy measurement is qualified, the baseline is corrected according to the accuracy test data. The hull centerline, flange half-width line Y1 and flange angle ruler line FR1 are drawn onto the platform plate, and the horizontal line Z1 is drawn onto the mid-longitudinal wall and rib panel. Then the hull centerline, flange half-width line Y1, flange angle ruler line FR1 and horizontal line Z1 are transferred to the outer plate of the hull.

[0007] Optionally, the ship center line, the flange half-width line Y1, the flange angle ruler line FR1 and the horizontal line Z1 are drawn through the outer plate, then a sample is punched to mark and a tape is pasted to protect.

[0008] Optionally, the length of the ship center line, the flange half-width line Y1, the flange angle ruler line FR1 and the horizontal line Z1 is greater than or equal to 200mm.

[0009] Optionally, in step 2), the half-width line Y2 and the angle ruler line FR2 of the rudder device center are drawn on the ground, the dock pier and the support are arranged, and the position of the section is adjusted: the half-width line Y2 of the section on the ground is aligned with the half-width line Y1 drawn on the flange, the center of the section is positioned; the angle ruler line FR2 of the section on the ground is aligned with the angle ruler line FR1 on the flange, the front and back of the section are positioned; the height of the section is positioned based on the horizontal line Z1.

[0010] Optionally, in step 2), the welding process of each section is as follows: welding from the middle to both sides, welding the butt joint of the outer plate first, then welding the butt joint of the platform plate, then welding the butt joint of the longitudinal girder, and finally welding the butt joint of the platform and the longitudinal rib of the outer plate.

[0011] Optionally, in the welding process of the section, an observation hole is opened on the outer plate, the datum positioning data of the flange cylinder assembly is monitored by a total station throughout the process, and if the detected data deviates, the welding position of the section is adjusted.

[0012] Optionally, in step 3), after the total section is welded, the state of the total section after assembly is measured, and the longitudinal profile line Y3, the horizontal line Z2 and the rib position line FR3 of the center of the upper surface of the flange are measured, and if the deviation of the marked datum exceeds the set requirement, the center line, the flange angle ruler line, the horizontal line and the longitudinal profile line on the total section and the outer plate are corrected.

[0013] Optionally, in step 5), the front and back joint lines of the datum section are made before the total section is hoisted, the baseline height line of the dock or the berth is made, and the rib position line FR4 and the longitudinal profile line Y4 are made on the ground; when the total section is positioned, the longitudinal profile line Y5, the horizontal line Z3 and the rib position line FR5 on the outer plate of the total section are measured based on the datum of the dock or the berth, and the positioning of the total section is completed when the datum lines are matched, and then the total section is welded by large joint, and the welding is performed from the middle to both sides, the butt joint of the outer plate is welded first, then the butt joint of the platform plate is welded, the datum positioning data of the flange is monitored throughout the welding process, the deviation is adjusted in time, and the welding procedure is adjusted according to the measurement data.

[0014] Optionally, in step 6), after the total section is welded, the longitudinal profile line, the horizontal line and the rib position line of the center of the upper surface of the flange are inspected and corrected based on the datum line of the dock or the berth.

[0015] The beneficial effects of the present application are: by corresponding the segmented reference line with the ground reference line, the segmented welding and the rudder propeller device installation precision are ensured, the process of the rudder propeller device installation is moved forward under the premise of ensuring the installation precision, is not affected by the ship body loading, reduces the construction difficulty, the rudder propeller device can be installed after the completion of the total section, the assembly of the rudder propeller device is completed before the total section loading, the total section integrity is improved, and the shipbuilding cycle is greatly shortened. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described in detail below according to the drawings and embodiments.

[0017] Figure 1 The flowchart of the installation method described in the embodiments of the present application is shown in the figure.

[0018] Figure 2 The half-width line and the angle ruler line described in the embodiments of the present application are shown in the figure. DETAILED DESCRIPTION

[0019] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0022] As Figure 1 ,Figure 2 As shown, the embodiment provides a method for installing a pod-type full-rotation rudder propeller device on a total section, including the following steps: 1) after the section where the rudder propeller device is located is welded and the precision detection is qualified, install the flange cylinder assembly on the section, and draw a reference line on the section; 2) draw a positioning reference line on the ground, and complete the positioning installation of the section on the ground by corresponding to the reference line on the section, align each section, and weld the total to form a total section; 3) after the total section is welded, measure the reference positioning data on the total section, and determine whether the deviation of the detected reference positioning data exceeds the set range, if the deviation does not exceed the set range, it is determined that the total section is welded and the total section is corrected by using a pyrotechnic device; 4) hoist the rudder propeller device to the flange cylinder assembly for positioning and assembly; 5) hoist the total section to the dock or the berth for large closing welding; 6) after the total section is welded, detect each reference parameter on the total section, and perform inspection and correction with the corresponding reference parameters on the dock or the berth.

[0023] Based on the above scheme, the overall process includes five main steps, the first step is to install the flange cylinder assembly, the second step is to assemble the sections, the third step is to install the rudder propeller device, and the fourth step is to inspect the composite line of the reference line.

[0024] The first step specifically includes the following steps: A, the flange cylinder assembly is pre-made, in order to ensure that the rudder propeller device can be accurately positioned and installed on the flange, the cylinder diameter is only allowed to be positive tolerance, and the flange cylinder assembly assembly positioning perpendicularity is allowed to deviate ±2mm; B, after the section where the rudder propeller device is located is welded and the precision detection is qualified, the positioning and installation of the flange cylinder assembly are performed; C, after the section is completed and the precision measurement is qualified, the reference line is corrected according to the precision report, the ship centerline, the flange half-width line Y1 and the flange angle ruler line FR1 are drawn on the platform plate, the horizontal line Z1 is drawn on the centerline and the rib plate, and then the ship centerline, the flange half-width line Y1, the flange angle ruler line FR1 and the horizontal line Z1 are drawn on the ship outer plate. The reference line is drawn through the outer plate for use in the section pre-loading stage and the total section positioning data review, and then the sample is punched and marked. All the above marking lines are at least 200mm long, and the sample is punched and marked after the sample is punched and marked. The adhesive tape is protected as the subsequent total assembly positioning reference.

[0025] In the above steps, the flange cylinder assembly is mainly used for positioning and fixing the rudder propeller device, in order to improve the accuracy of the installation of the rudder propeller device, the deviation of the flange cylinder assembly assembly positioning perpendicularity is limited to within ±2mm, and in order to maintain a relatively stable state after the installation of the rudder propeller device, the diameter of the flange cylinder is only allowed to be positive tolerance, and is not allowed to be negative tolerance. Before the flange cylinder assembly is installed, the welding precision of the section needs to meet the requirements of the assembly scheme for the precision, so that the installed flange cylinder assembly can be accurately fixed at the preset position, and the purpose of accurately installing the rudder propeller device can be achieved.

[0026] The reference line is drawn through the outer plate to ensure the accuracy of the installation between the components when the pre-installation stage and the total segment welding stage, and the reference line, i.e. the marking line, needs to be more than 200 mm in length, so that the extension length of the reference line can be easily corresponded. In addition, the length of the reference line can be adjusted according to the size of the segment or the overall size of the ship to be built, including but not limited to 200 mm, and can be increased or decreased on this basis. In the case of reducing the length of the reference line, it is suitable for the manufacturing process of small ships.

[0027] In the second step, the following steps are specifically included: A, according to the total assembly scheme, the total assembly is carried out, the half-width line Y2 and the angle ruler line FR2 of the rudder propeller device center are drawn on the ground, the dock pier and the support are arranged, and the position of the segment is adjusted and positioned: the half-width line Y1 on the segment is aligned with the half-width line Y2 on the ground to position the center of the segment; the flange angle ruler line FR1 on the segment is aligned with the angle ruler line FR2 on the ground to position the front and back of the segment; the height of the segment is positioned with the horizontal line Z1 as the reference, and the appropriate deformation is applied upward; B, total segment welding, following the principle of left-right symmetry of large closing seam, welding from the middle to both sides, first welding the butt joint of the outer plate, then welding the butt joint of the platform plate, then welding the butt joint of the longitudinal girder, and finally welding the butt joint of the platform and the longitudinal plate; C, after the total segment welding is completed, the state of the total segment assembly after completion and the longitudinal profile line Y3, the horizontal line Z2 and the rib position line FR3 of the center of the upper surface of the flange are measured, and if the deviation of the reference exceeds the set requirement, the center line, the flange angle ruler line, the horizontal line and the longitudinal profile line on the total segment and the outer plate are re-corrected.

[0028] In the specific steps of the second step, at least multiple positioning adjustments are required during the process of welding the segment into the total segment. The first positioning adjustment is to align the reference lines drawn on the segment with the ground reference lines during the installation of the segment, and the second positioning adjustment is to adjust adaptively according to the deviation of the real-time detected data feedback during the welding process to ensure the accuracy of the welding position. The second adjustment can be multiple, and the deviation needs to be adjusted in time at any time point of welding. In addition, in order to ensure the accuracy of the position of the total segment after welding, the reference parameters measured on the total segment need to be adjusted with reference to the original value to achieve that the total segment formed by welding corresponds to the original set reference line, so as to further ensure the accuracy of the installation of the rudder propeller device.

[0029] In the total segment welding process, in order to facilitate the observation of the change of the position in the welding process, so as to adjust the welding position at any time, an observation hole is opened on the outer plate, the datum positioning data of the flange cylinder assembly is monitored by the total station instrument, if the deviation of the data is detected, the welding position of the segment is adjusted. Through the setting of the total station instrument, the welding condition can be monitored in real time and effectively, in the case of no deviation, the welding process does not need to be intervened, only when the deviation of the monitored data is obtained, the welding operation needs to be suspended, after the welding position is adjusted, further welding is carried out.

[0030] It is worth mentioning that in the welding process, deformation is a common phenomenon, which is mainly caused by local and overall deformation of the hull structure after welding. If effective measures are not taken in time, it will cause size deviation, structure instability, strength reduction and other consequences, which will bring great difficulty to the next stage of welding and assembly work, not only leading to the extension of the construction period, but even unable to meet the specification requirements, therefore, in the process of segment welding, appropriate deformation needs to be applied to avoid the deformation of the total segment after welding. The appropriate deformation specifically refers to that before welding, a reverse deformation value is given to the hull segment, which should be equal to or greater than the deformation of the hull segment after welding, but the direction is opposite. The reverse deformation amount needs to be determined according to the size of the welded part, the material thickness, the welding method and the welding specification. Avoiding the deformation of the total segment after welding can not only meet the requirements of ship strength and use performance, but also meet the requirements of economic type.

[0031] In the third step, after the hull structure welding and explosive correction of the rudder propeller device total segment are completed, the installation of the rudder propeller device is carried out, the rudder propeller device is lifted by the crane to align with the flange cylinder assembly, the installation position of the rudder propeller device is positioned by the flange cylinder assembly, and the rudder propeller device is stabilized. In this scheme, according to the form of the rudder propeller device, the specific installation includes but is not limited to the propulsion module and the steering module. At present, more and more ships use the pod type full rotation rudder propeller device propulsion device, and the installation of the propulsion device has become an important process flow. Through the method proposed in this scheme, the propulsion device is installed, which not only ensures accurate assembly, but also greatly improves the overall manufacturing efficiency of the ship.

[0032] In the fourth step, the following steps are included: A, the front and rear butt joint lines of the datum section are made before hoisting the total section, the base line height line of the dock or berth is made, and the rib position line FR4 and the longitudinal centerline Y4 are made on the ground; B, when the total section is positioned, the longitudinal centerline Y5, the horizontal line Z3 and the rib position line FR5 on the outer plate of the total section are measured according to the dock or berth datum, and the positioning of the total section is completed when the datum lines are matched; C, the reverse deformation is applied to the tail end of the total section without considering the sinking after the total section is completed and the support is removed, and the actual construction scheme is adjusted adaptively; D, then the total section is welded, the welding is performed from the middle to both sides, the butt joint of the outer plate is welded first, then the butt joint of the platform plate is welded, the datum positioning data of the flange are monitored during the welding process, the deviation is adjusted in time, and the welding procedure is adjusted according to the measurement data.

[0033] In the fifth step, after the total section is positioned and welded, the longitudinal centerline, the horizontal line and the rib position line on the center of the upper surface of the flange are inspected and corrected according to the datum line of the dock or berth.

[0034] Compared with the existing method of installing the pod type full-rotating rudder propeller device in the total section, the biggest difference between the installation method provided by the embodiment and the existing method is the timing of installing the rudder propeller device, and the installation process of the rudder propeller device is moved forward in the scheme. In the case of moving the process forward, the accuracy of the installation is ensured, and since the rudder propeller device is assembled before the total section is positioned, the rudder propeller device is not limited by the installation space during the installation process, the assembly is more convenient and fast, the construction difficulty is reduced, the integrity of the total section is improved, and the purpose of improving the shipbuilding cycle is achieved.

[0035] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0036] In the description of the present specification, the description referring to the terms "an embodiment", "an example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0037] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0038] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these ways will fall within the scope of protection of the present application.

Claims

1. A method of installing a pod-type azimuth thruster assembly on a unit, characterized in that, The method comprises the following steps: Step 1) after the welding of the section where the rudder propeller device is located is completed and the precision detection is qualified, the flange cylinder assembly is installed on the section, and a reference line is drawn on the section; wherein, after the completion precision measurement of the section is qualified, the reference line is corrected according to the precision detection data, the ship center line, the flange half-width line Y1 and the flange angle ruler line FR1 are drawn on the platform plate, the horizontal line Z1 is drawn on the center wall and the rib plate, and then the ship center line, the flange half-width line Y1, the flange angle ruler line FR1 and the horizontal line Z1 are drawn on the ship outer plate; Step 2) the positioning reference line is drawn on the ground, and the positioning and installation of the section on the ground are completed by corresponding to the reference line on the section, the sections are aligned and welded to form a total section; wherein, the welding process of each section is as follows: welding from the middle to both sides, welding the outer plate butt joint first, then welding the platform plate butt joint, then welding the longitudinal butt joint, and finally welding the platform and the outer plate longitudinal butt joint; and in the welding process of the section, an observation hole is formed on the outer plate, and the reference positioning data of the flange cylinder assembly is monitored by a total station instrument throughout the process, and if the detected data deviates, the welding position of the section is adjusted; Step 3) after the total section welding is completed, the reference positioning data on the total section is measured, and it is judged whether the detected reference positioning data deviates beyond the set range, and in the case that it does not deviate beyond the set range, it is determined that the total section welding is completed and the total section is corrected by using a firework; Step 4) the rudder propeller device is hoisted to the flange cylinder assembly for positioning and assembly; Step 5) the total section is hoisted to the dock or the berth for large closing welding; Step 6) after the total section welding is completed, each reference parameter on the total section is detected, and the corresponding reference parameters on the dock or the berth are tested and corrected.

2. The method of installing a pod-type azimuthing propeller unit in a block according to claim 1, characterized in that, The ship center line, the flange half-width line Y1, the flange angle ruler line FR1 and the horizontal line Z1 are drawn through the outer plate, then a sample is made and a mark is punched, and then adhesive tape is pasted for protection.

3. The method of installing a pod-type azimuthing propeller unit on a hull section according to claim 1, wherein The lengths of the ship center line, the flange half-width line Y1, the flange angle ruler line FR1 and the horizontal line Z1 drawn are all greater than or equal to 200 mm.

4. The method of installing a pod-type azimuthing propeller unit on a hull section according to claim 1, wherein In step 2), the half-width line Y2 and the angle ruler line FR2 of the center of the rudder propeller device are drawn on the ground, the dock piers and supports are arranged, and the position of the section is adjusted: the half-width line Y2 of the center of the section is positioned by aligning the half-width line Y2 on the ground; the front and back positions of the section are positioned by aligning the angle ruler line FR2 on the ground with the angle ruler line FR1 on the section; and the height of the section is positioned by taking the horizontal line Z1 as the reference.

5. The method of installing a pod-type azimuthing propeller unit on a hull section according to claim 1, wherein In step 3), after the total section welding is completed, the state of the total section after assembly and the longitudinal centerline Y3, the horizontal line Z2 and the rib line FR3 of the center of the upper surface of the flange are measured, and the original flange base is taken as the reference, if the deviation of the reference exceeds the set requirement, the center line, the flange angle ruler line, the horizontal line and the longitudinal centerline on the total section and the outer plate are corrected again.

6. The method of installing a pod-type azimuthing propeller unit on a hull section according to claim 1, wherein In step 5, the front and rear joint lines of the datum section are made before hoisting the total section, the baseline height line of the dock or berth is made, and the rib position line FR4 and the longitudinal centerline Y4 are made on the ground; when the total section is positioned and loaded, the longitudinal centerline Y5, the horizontal line Z3 and the rib position line FR5 on the outer plate of the total section are measured by the dock or berth datum, and the total section positioning and loading are completed when the datum lines are matched, and then the total section is large-welded by closing, the welding is performed from the middle to both sides, the outer plate butt joint is welded first, then the platform plate butt joint is welded, the flange datum positioning data is monitored during the whole welding process, the deviation is adjusted in time, and the welding procedure is adjusted according to the measurement data.

7. The method of installing a pod-type azimuthing propeller unit on a hull section according to claim 1, wherein In step 6, after the total section is loaded and welded, the longitudinal centerline, the horizontal line and the rib position line on the center of the upper surface of the flange are inspected and corrected by the datum line of the dock or berth.

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