A positioning method for a single-hull fuel tank section

Abstract

The present invention discloses a positioning method for a single-hull fuel tank section, the positioning method comprising the following steps: S1, installing a guide slider on the fuel tank before hoisting the fuel tank; S2, determining the relative position of the guide slider on the fuel tank; S3, installing the corresponding slider base on the double bottom of the hull according to the relative position; S4, hoisting the fuel tank in place, adjusting the position of the fuel tank so that the matching line on the guide slider is aligned with the matching line on the corresponding slider base; S5, assembling and welding after the fuel tank is positioned. The present invention adopts a positioning slider for positioning, has simple tooling, simple operation, and is convenient for on-site construction.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a positioning method for a single-hull fuel tank section in a fuel tank modification project. Background Art

[0002] The single-hull fuel tank section is very easy to deform during the lifting and positioning process due to its weak structure. Therefore, it is necessary to find a quick positioning method to reduce the risk of positioning the fuel tank section. For large sections / rings, the commonly used positioning methods are: 1. Use multiple synchronous jacking devices to shift and position the section; 2. Use large lifting equipment to lift the section, and use a three-dimensional total station for positioning. However, when the single-hull fuel tank section has a weak lower structure and needs to be lifted into the tank, the above methods cannot be used for positioning. Summary of the invention

[0003] In response to the problems existing in the prior art, the present invention provides a positioning method for a single-hull fuel tank section. Some embodiments of the present invention can use an auxiliary positioning slider to quickly position the fuel tank section, taking into account the characteristics of the single-hull fuel tank section having a weak structure and needing to be hoisted into the tank as a whole, thereby reducing the positioning time of the fuel tank, reducing the risk of deformation during the positioning process, and improving production efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A positioning method for a single-hull fuel tank section, the positioning method comprising the following steps: S1, installing a guide slider on the fuel tank before hoisting the fuel tank; S2, determining the relative position of the guide slider on the fuel tank; S3, installing a corresponding slider base on the double bottom of the hull according to the relative position; S4, hoisting the fuel tank into place, adjusting the position of the fuel tank so that the matching line on the guide slider is aligned with the matching line on the corresponding slider base; S5, assembling and welding the fuel tank after positioning is completed.

[0006] Preferably, step S1 includes that the guide slider is installed at the lower end of the longitudinal girder of the fuel tank, wherein the guide slider includes: 2 longitudinal guide sliders for adjusting the longitudinal position of the fuel tank, and 3 transverse guide sliders for adjusting the transverse position of the fuel tank.

[0007] Preferably, step S1 includes that the longitudinal guide sliders are arranged on the left and right sides of the longitudinal girder, and the transverse guide sliders are arranged on the front end or the rear end of the longitudinal girder.

[0008] Preferably, step S1 includes installing, on the longitudinal girder, reinforcing channel steel for ensuring the strength of the longitudinal girder at the location where the longitudinal guide slider is installed.

[0009] Preferably, step S1 includes installing triangular plates on both sides of the longitudinal girder to ensure the strength of the longitudinal girder where the transverse guide slider is installed.

[0010] Preferably, step S2 includes, after the longitudinal guide slider is installed, measuring the distance between the alignment line of the longitudinal guide slider and the fuel tank rib detection line.

[0011] Preferably, step S3 includes measuring the same distance based on the distance between the matching line of the longitudinal guide slider and the fuel tank rib inspection line, with the double bottom rib inspection line as the reference, as the longitudinal position of the longitudinal slider base; the main board of the longitudinal slider base is 150 mm away from the middle longitudinal position, as the lateral position of the longitudinal slider base.

[0012] Preferably, step S3 includes: the side plate of the transverse slider base is attached to the transverse bulkhead as the longitudinal position of the transverse slider base; the matching line of the transverse slider base is aligned with the corresponding longitudinal girder theoretical line as the transverse position of the transverse slider base.

[0013] Preferably, step S4 includes providing a detachable adjustment panel connected by spot welding on the transverse slider base panel and the longitudinal slider base panel to reduce the influence of the double bottom flatness on positioning. Considering the flatness of the double bottom of the hull, movable panels are provided on the panels of the transverse and longitudinal slider bases to level the height difference of the double bottom caused by the operation of the ship and reduce the influence of the double bottom flatness on positioning.

[0014] Preferably, step S4 includes first adjusting the longitudinal position of the fuel tank so that the alignment line of the longitudinal guide slider is aligned with the alignment line of the longitudinal slider base; then adjusting the transverse position of the fuel tank so that the alignment line of the transverse guide slider is aligned with the theoretical plane of the corresponding longitudinal girder, and then vertically lowering the total section along the panel of the guide slider.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The positioning slider is used for positioning, which has simple tooling, simple operation, and is convenient for on-site construction; 2. The positioning slider is provided with a matching line, which is conducive to quickly finding the positioning reference, reducing the positioning time, and improving the on-site construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 these drawings without paying creative work.

[0017] Figure 1 This is a cross-sectional schematic diagram of the installation of a positioning slider for a fuel tank section according to an embodiment of the present invention.

[0018] Figure 2 This is a longitudinal section schematic diagram of the installation of a positioning slider for a fuel tank section according to an embodiment of the present invention.

[0019] Figure 3 In the embodiment of the present invention Figure 1 A partial enlarged view of point A.

[0020] Figure 4 In the embodiment of the present invention Figure 2 A partial enlarged view of point B.

[0021] Figure 5 In the embodiment of the present invention Figure 2 A partial enlarged view of point C.

[0022] Figure 6 This is a longitudinal guide slider in an embodiment of the present invention, wherein a is its front view and b is its side view.

[0023] Figure 7 This is a longitudinal slider base in an embodiment of the present invention, wherein c is its front view and d is its side view.

[0024] Figure 8 It is a transverse guide slider in an embodiment of the present invention, wherein e is its front view, f is its side view, and g is its top view.

[0025] Fig. 9 Schematic diagram of a transverse slider base in an embodiment of the present invention, wherein h is its front view and i is its side view.

[0026] Fig.10 It is a combination of a transverse guide slider and a transverse slider base in an embodiment of the present invention, wherein j is its front view and k is its side view.

[0027] 1-Fuel tank; 2-Longitudinal guide slider; 3-Longitudinal guide slider main board; 4-Longitudinal guide slider top board; 5-Longitudinal guide slider enclosure; 6-Longitudinal guide slider panel; 7-Longitudinal slider base; 8-Longitudinal slider base main board; 9-Longitudinal slider base enclosure; 10-Longitudinal slider base top board; 11-Longitudinal slider base panel; 12-Longitudinal guide slider adjustment plate; 14-Transverse guide slider; 15-Transverse guide slider panel; 16-Transverse guide slider reinforcement; 17-Transverse slider base; 18-Transverse slider base main board; 19-Transverse slider base top board; 20-Transverse slider base enclosure; 21-Transverse guide slider panel; 22-Transverse guide slider adjustment plate; 23-Match line of longitudinal guide slider; 24-Match line of longitudinal slider base; 25-Match line of transverse slider base; 26-Coincidence line of the match line of transverse slider base and the match line of transverse guide slider. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0029] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation on the present invention.

[0030] like Figure 1-10 As shown, this embodiment provides a positioning method for a single-hull fuel tank section, the method comprising the following steps:

[0031] S1. Before the overall section is hoisted, guide sliders are installed at the lower end of the longitudinal girder of the fuel tank. Two longitudinal sliders are set to adjust the longitudinal position of the fuel tank, and three transverse sliders are set to adjust the transverse position of the fuel tank. The longitudinal sliders are set on both sides of the longitudinal girder, and the transverse guide slider is set on one side of the longitudinal girder. Reinforced channel steel is installed on the longitudinal girder where the longitudinal guide slider is installed, and triangular plate reinforcement is installed on the longitudinal girder where the transverse guide slider is installed;

[0032] S2. After the longitudinal guide slider is installed, measure the distance between the joint line and the rib inspection line;

[0033] S3. According to the distance between the longitudinal guide slider and the rib inspection line, the same distance is measured as the longitudinal position of the longitudinal slider base. The main plate of the longitudinal slider base is 150mm away from the middle longitudinal position as its transverse position; the side plate of the transverse slider base is attached to the transverse bulkhead as its longitudinal position, and the joint line is aligned with the corresponding longitudinal girder theoretical line as its transverse position;

[0034] S4. First adjust the longitudinal position of the fuel tank so that the longitudinal guide slider is aligned with the matching line on the longitudinal slider base; then adjust the transverse position of the fuel tank so that the matching line on the transverse guide slider is aligned with the theoretical surface of the corresponding longitudinal girder, and then slowly lower the total section along the panel of the guide slider.

[0035] S5. After the fuel tank is positioned, it is assembled and welded.

[0036] Although the above embodiments have been described in detail for the present invention, it should be understood by those skilled in the art that modifications or improvements may be made based on the contents disclosed in the present invention without departing from the spirit and scope of the present invention, and such modifications and improvements are within the spirit and scope of the present invention.

Claims

1. A positioning method for a single-hull fuel tank section, characterized in that: The positioning method comprises the following steps: S1. Before hoisting the fuel tank, the guide slider is installed on the fuel tank: wherein the guide slider is installed at the lower end of the longitudinal girder of the fuel tank, wherein the guide slider includes two longitudinal guide sliders for adjusting the longitudinal position of the fuel tank, and three transverse guide sliders for adjusting the transverse position of the fuel tank, wherein the longitudinal guide sliders are arranged on the left and right sides of the longitudinal girder, and the transverse guide sliders are arranged at the front end or the rear end of the longitudinal girder; S2. Determine the relative position of the guide slider on the fuel tank: After the longitudinal guide slider is installed, measure the distance between the longitudinal guide slider's joint line and the fuel tank rib inspection line; S3. According to the relative position, the corresponding slider base is installed on the double bottom of the hull. The longitudinal guide slider corresponds to the longitudinal slider base, and the transverse guide slider corresponds to the transverse slider base. The longitudinal slider base includes a longitudinal slider base mainboard, a longitudinal slider base coaming, a longitudinal slider base top plate and a longitudinal slider base panel. The transverse slider base includes a transverse slider base mainboard, a transverse slider base top plate, a transverse slider base coaming and a transverse slider base panel: According to the distance between the joint line of the longitudinal guide slider and the fuel tank rib inspection line, the same distance is measured based on the double bottom rib inspection line as the longitudinal position of the longitudinal slider base; the longitudinal slider base mainboard is 150mm away from the middle longitudinal position, which is the transverse position of the longitudinal slider base. The transverse slider base coaming is attached to the transverse bulkhead, which is the longitudinal position of the transverse slider base. The joint line of the transverse slider base is aligned with the corresponding longitudinal girder theoretical line, which is the transverse position of the transverse slider base. S4. The fuel tank is hoisted into place, and the position of the fuel tank is adjusted so that the alignment line on the guide slider is aligned with the alignment line on the corresponding slider base: a detachable adjustment panel connected by spot welding is respectively provided on the transverse slider base panel and the longitudinal slider base panel to reduce the influence of the flatness of the double bottom on the positioning. First, the longitudinal position of the fuel tank is adjusted so that the alignment line of the longitudinal guide slider is aligned with the alignment line of the longitudinal slider base; then the transverse position of the fuel tank is adjusted so that the alignment line of the transverse guide slider is aligned with the theoretical line of the corresponding longitudinal girder, and then the total section is vertically lowered along the panel of the transverse guide slider; S5. After the fuel tank is positioned, it is assembled and welded.

2. The positioning method for a single-hull fuel tank section according to claim 1, characterized in that: Step S1 includes installing, on the longitudinal girder, a reinforcing channel steel for ensuring the strength of the longitudinal girder at the location where the longitudinal guide slider is installed.

3. The positioning method for a single-hull fuel tank section according to claim 1, characterized in that: Step S1 includes installing triangular plates on both sides of the longitudinal girder to ensure the strength of the longitudinal girder where the transverse guide slider is installed.

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