A jig structure for a prefabricated ship outboard pipe

Abstract

The utility model provides a kind of for prefabricated ship outboard pipe's template structure, belong to outboard pipe welding technical field.It solves the existing outboard pipe and shell plate belong to dissimilar metal welding, welding defect is prone to appear and other problems.The utility model includes new steel plate, positioning plate, simulation piece, is provided with a new area on shell plate, simulation piece is used to replace outboard pipe, after simulation piece and shell plate installation positioning, positioning plate connects simulation piece and shell plate, and positioning plate and simulation piece combination form template assembly piece;Template assembly piece is removed to workshop and is assembled and fixed with new steel plate, simulation piece is removed and replaces outboard pipe, outboard pipe and new steel plate are assembled and fixed in workshop to form sheet body assembly, and sheet body assembly is removed to ship site and is welded and fixed with shell plate.The utility model's advantage lies in by template method the construction process difficult to assemble and weld on site, transfer to workshop of construction condition complete easy control, reduce the difficulty of on-site construction.

Description

Technical Field

[0001] This utility model belongs to the field of outboard tube welding technology, and relates to a template structure for prefabricating ship outboard tubes. Background Technology

[0002] During ship repair and conversion, the replacement of hull outer pipes is frequently required. In addition to the commonly used carbon steel pipes, some outer pipes are made of super stainless steel. In particular, super stainless steel outer pipes (such as S32750, S32205, and S31254) are widely used in ship exhaust gas desulfurization retrofitting.

[0003] The welding of these super stainless steel pipes to low-carbon steel ship hull plates is a dissimilar metal welding process, which is highly prone to welding defects, especially weld cracks. Avoiding weld cracks has always been a key challenge in construction. Furthermore, super stainless steel cannot be cut with commonly used oxy-acetylene cutting tools; it can only be cut with plasma or abrasive wheels, resulting in time-consuming, labor-intensive, and poorly maintained construction conditions when repairing pipelines on-site. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in the existing assembly and welding process of outboard tubes and hull plates. The template structure of this application can transfer the construction process, which is difficult to assemble and weld on-site, to a workshop with complete and easily controllable construction conditions. The assembly and welding of super stainless steel outboard tubes and replacement steel plates can be completed in the workshop, thereby avoiding various problems in the assembly and welding of super stainless steel outboard tubes and carbon steel hull plates.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A template structure for prefabricating ship outboard tubes is characterized by comprising a replacement steel plate, a positioning plate, and a simulation component. A replacement area is provided on the hull plate, and the outboard tube is installed in the replacement area. The simulation component is used to replace the outboard tube. After the simulation component is installed and positioned on the ship site with the hull plate in the replacement area, the positioning plate connects the simulation component and the hull plate to fix the relative position of the simulation component and the hull plate, so that the positioning plate and the simulation component are combined to form a template assembly.

[0007] The above-mentioned template assembly was moved to the workshop and assembled and fixed with the new steel plate. The simulation part was removed and the outboard tube was replaced. The outboard tube and the new steel plate were assembled and fixed in the workshop to form a sheet assembly. The sheet assembly was moved to the ship site and installed in the replacement area and welded and fixed to the hull plate.

[0008] In the aforementioned model structure for prefabricating ship overboard tubes, the model component includes a carbon steel pipe and a flange, which are fixedly connected to form the model component; the external dimensions of the model component are consistent with the external dimensions of the overboard tube.

[0009] In the aforementioned template structure for prefabricating ship hull tubes, the material and thickness of the replacement steel plate are consistent with those of the ship hull plate.

[0010] In the aforementioned template structure for prefabricating ship outer tubes, there are at least four positioning plates, each positioned on the outer periphery of the carbon steel pipe.

[0011] In the aforementioned template structure for prefabricating ship hull tubes, the positions where the positioning plate contacts the hull plate and the carbon steel pipe are modified on-site to ensure that the contact surfaces of the positioning plate and the hull plate and the positioning plate and the carbon steel pipe have consistent lines and fit tightly together.

[0012] In the aforementioned template structure for prefabricating ship hull tubes, the position where the end of the carbon steel pipe contacts the hull plate is modified on-site to ensure that the contact surface of the carbon steel pipe and the hull plate is consistent in shape and fits tightly.

[0013] In the aforementioned template structure for prefabricating ship outer tubes, the replacement steel plate is roll-formed so that the shape of the replacement steel plate is consistent with the shape of the replacement area on the hull plate.

[0014] In the aforementioned template structure for prefabricating ship outer tubes, the replacement steel plate is marked with the relative positions of the upper and lower bow and stern; there are four positioning plates, which are symmetrically distributed around the carbon steel pipe along the cross center line; the end face of the flange is marked with the relative positions of the upper and lower bow and stern, which correspond one-to-one with the positions of each positioning plate.

[0015] In the aforementioned template structure for prefabricating ship outer tubes, the positioning plate is a steel triangular plate with a thickness of ≥12mm. The external dimensions of the positioning plate can be adjusted according to actual conditions.

[0016] Compared with existing technologies, this invention utilizes a template method to transfer the difficult on-site assembly and welding process to a workshop with complete and easily controlled construction conditions. The assembly and welding of the super stainless steel outboard tube and the replacement steel plate are completed within the workshop. The prefabricated sheet components are then transported to the ship's site, where only the assembly and welding of the replacement steel plate on the sheet components to the hull plating is required. This avoids the difficult on-site welding of the super stainless steel outboard tube and the carbon steel hull plating. This significantly reduces on-site construction difficulty, improves construction quality, and reduces construction time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation of the template assembly and the hull plate of this utility model;

[0018] Figure 2 This is a plan view of the template assembly and the replacement steel plate of this utility model;

[0019] Figure 3 This is a structural schematic diagram of the template assembly and the replacement steel plate of this utility model.

[0020] In the diagram, 1 is the hull plate; 2 is the new steel plate; 3 is the positioning plate; 4 is the carbon steel pipe; and 5 is the flange. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] This utility model discloses a template structure for prefabricating ship overboard tubes, comprising a replacement steel plate 2, a positioning plate 3, and a simulation component. A replacement area is provided on the hull plate 1, and the overboard tube is installed within this replacement area. The simulation component is used to replace the overboard tube. Figure 1 As shown, after the simulation component is installed and positioned on the ship's site and in the replacement area of ​​the hull plate 1, the positioning plate 3 connects the simulation component and the hull plate 1 to fix the relative position of the simulation component and the hull plate 1 so that the positioning plate 3 and the simulation component can be combined to form a template assembly.

[0023] The above-mentioned template assembly is moved to the workshop and assembled and fixed with the replacement steel plate 2. The simulation part is removed and the outboard tube is replaced. The outboard tube and the replacement steel plate 2 are assembled and fixed in the workshop to form a sheet assembly. The sheet assembly is moved to the ship site and installed in the replacement area and welded and fixed to the hull plate 1.

[0024] The material and thickness of the replacement steel plate 2 are the same as those of the hull plate 1. There are no specific requirements for the outline shape of the replacement steel plate 2; it can be adjusted according to actual conditions. The replacement steel plate 2 is roll-formed to ensure that its shape matches the shape of the replacement area on the hull plate 1. Figure 2 As shown, the roll-formed steel plate is marked with the upper and lower, bow and stern relative positions of the hull plate 1 in the replacement area, and the cross center line of the outboard tube on the steel plate is drawn according to the outboard tube positioning data in the drawing. Note that the length of this center line should be greater than the diameter of the steel tube, so as to facilitate the correction of the relative reference between the two when positioning the outboard tube.

[0025] The positioning plate 3 is a steel triangular plate with a thickness of ≥12mm. The external dimensions of the positioning plate 3 can be adjusted according to the actual situation. Its function is to fix the relative position of the simulation component and the hull plate 1 after the simulation component is positioned and installed on the ship according to the drawing, especially the relative angle between the simulation component and the hull plate 1, and to form a template assembly together with the simulation component. There are at least four positioning plates 3. Each positioning plate 3 is symmetrically arranged around the carbon steel pipe 4 along the cross center line of the carbon steel pipe 4, bow and stern, according to the drawing. The straight edges of the positioning plates 3 that contact the hull plate 1 and the simulation component are modified on site to make them consistent with the lines of the hull plate 1 and the simulation component and fit tightly.

[0026] The simulated component includes a carbon steel pipe 4 and a flange 5, which are fixedly connected to form the simulated component. The external dimensions of the simulated component formed by the combination of flange 5 and carbon steel pipe 4 must be strictly manufactured according to the dimensions of the finished super stainless steel outboard tube. Flange 5 and carbon steel pipe 4 are made of the same material and are connected by spot welding for easy disassembly. Based on the outboard tube positioning drawings, the assembly of the steel pipe and flange 5 is accurately positioned on the hull plate 1. The simulated component of flange 5 and carbon steel pipe 4 is positioned on the hull plate 1 with flange 5 as the reference. The pipe end of carbon steel pipe 4 is adjusted to match the line of the hull plate 1, ensuring a tight fit between the pipe end and the hull plate 1. Then, the bow and stern positions are marked on the end face of flange 5, and these markings should be consistent with the position of positioning plate 3.

[0027] The super stainless steel super outboard tube described in this utility model is a finished outboard tube that is manufactured and is the target outboard tube that is ultimately installed on the ship.

[0028] The process flow for replacing the outer tubes in this utility model is as follows:

[0029] 1. Determine the key data such as the replacement area, material, and thickness of the hull plate 1, and take a template sample of the hull plate 1 line shape of the replacement area to obtain the hull plate 1 outline. Prepare the replacement steel plate 2 in the workshop according to the size required by the drawings.

[0030] 2. For example Figure 1 As shown, according to the data of the outboard tube positioning drawing, the simulation component is accurately positioned and installed on the hull plate 1; after the simulation component is installed, the positioning plate 3 is installed to fix the relative position and relative angle between the simulation component and the hull plate 1. The carbon steel pipe 4, the positioning plate 3, and the flange 5 together form the template assembly.

[0031] 3. For example Figure 3 As shown, the template assembly for on-site positioning and fixing of the ship is sent to the workshop and assembled with the replacement steel plate 2 prepared in the workshop according to the drawing; the simulated parts on the template assembly are removed and replaced with super stainless steel outboard tubes. In the workshop, the super stainless steel outboard tubes and replacement steel plate 2 are installed and fixed to form a sheet assembly.

[0032] 4. Transport the prefabricated sheet components from the workshop to the ship site, and weld and fix the replacement steel plate 2 on the sheet components to the hull plate 1 in the replacement area on the ship. The replacement of the super stainless steel outboard tube is completed.

[0033] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0034] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A template structure for prefabricating ship outer hull tubes, characterized in that, The system includes a replacement steel plate (2), a positioning plate (3), and a simulation component. A replacement area is provided on the hull plate (1), and an overboard tube is installed in the replacement area. The simulation component is used to replace the overboard tube. After the simulation component is installed and positioned on the hull plate (1) in the replacement area at the ship site, the positioning plate (3) connects the simulation component and the hull plate (1) to fix the relative position of the simulation component and the hull plate (1) so that the positioning plate (3) and the simulation component are combined to form a template assembly. The above template assembly was moved to the workshop and assembled and fixed with the replacement steel plate (2). The simulation part was removed and the outboard tube was replaced. The outboard tube and the replacement steel plate (2) were assembled and fixed in the workshop to form a sheet assembly. The sheet assembly was moved to the ship site and installed in the replacement area and welded and fixed with the hull plate (1).

2. A template structure for prefabricating ship outer tubes according to claim 1, characterized in that, The simulated component includes a carbon steel pipe (4) and a flange (5), which are fixedly connected to form the simulated component; the external dimensions of the simulated component are consistent with the external dimensions of the outer tube.

3. A template structure for prefabricating ship outer tubes according to claim 1, characterized in that, The material and thickness of the replacement steel plate (2) are the same as those of the hull plate (1).

4. A template structure for prefabricating ship outer tubes according to claim 2, characterized in that, There are at least four positioning plates (3), each of which is located on the outer periphery of the carbon steel pipe (4).

5. A template structure for prefabricating ship outer tubes according to claim 2, characterized in that, The positions where the positioning plate (3) contacts the hull plate (1) and the carbon steel pipe (4) are modified on-site so that the contact surfaces of the positioning plate (3) and the hull plate (1) and the carbon steel pipe (4) are consistent and tightly fitted.

6. A template structure for prefabricating ship outer tubes according to claim 2, characterized in that, The position where the pipe end of the carbon steel pipe (4) contacts the hull plate (1) is modified on-site so that the contact surface of the carbon steel pipe (4) and the hull plate (1) are consistent and tightly fitted.

7. A template structure for prefabricating ship outer tubes according to claim 1, characterized in that, The replacement steel plate (2) is rolled to make the shape of the replacement steel plate (2) consistent with the shape of the replacement area on the hull plate (1).

8. A template structure for prefabricating ship outer tubes according to claim 2, characterized in that, The replacement steel plate (2) is marked with the relative positions of the upper and lower bow and stern; there are four positioning plates (3), which are symmetrically distributed around the carbon steel pipe (4) along the cross center line; the flange (5) is marked with the relative positions of the upper and lower bow and stern, which correspond one-to-one with the positions of each positioning plate (3).

9. A template structure for prefabricating ship outer tubes according to claim 1, characterized in that, The positioning plate (3) is a steel triangular plate with a thickness of ≥12mm.

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