Design structure for narrow space of marine base
By adopting a "Y"-shaped buttted base reinforcement form in the design of the ship crane boom base, the problems of high welding difficulties and high cost caused by narrow spaces are solved, and the structural strength and cost-effectiveness are achieved.
Patent Information
- Application Number
- CN202420616033.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-03-28
AI Technical Summary
In the design of the base of the ship crane arm frame, the existing technology is difficult to effectively avoid narrow spaces, resulting in high welding difficulties, many crossings of jobs, increasing the number of reinforced parts and weld lengths, thereby increasing the cost of raw material procurement.
The base reinforcement form of "Y" type butt is adopted, and the lower ends of the first and second parts form a "Y" type butt with the upper end of the transition plate, and the lower end of the transition plate is cut inclined to connect the third part to reduce the difficulty of welding in a narrow space.
While meeting the structural strength requirements, it effectively reduces the difficulty of welding in narrow spaces, reduces the number of reinforced parts and weld lengths, reduces the cost of raw materials procurement, and reduces the cross-work types.
Smart Images
Figure CN222793784U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ship structure construction, and particularly relates to a design structure for a narrow space of a ship base. Background Art
[0002] When designing the base of a large ship crane boom, in order to meet the requirements of both structural strength and ship workspace, the base design will meet the structural strength requirements of the mechanism with the smallest and most optimal size. Therefore, narrow spaces cannot be completely avoided when designing the base. Usually, such narrow spaces are difficult to avoid by adjusting the structural form locally. Therefore, how to scientifically design the structural form in narrow spaces is an issue that ship designers need to consider.
[0003] Currently, the method usually adopts the form of adding full alignment reinforcement below the platform structure B under the base. Figure 1 As shown in FIG. 1 , the lower reinforcement A of the first component 1 and the second component 2 is likely to be too close to the third component 3, resulting in a narrow space, which is inconvenient or even impossible to perform grinding and painting. To solve this problem, the lower reinforcement A of the first component 1 and the second component 2 can be installed at an increased angle to be corner-jointed with the third component 3, and a steel liner 5 can be provided on the inner side of the lower reinforcement A, as shown in FIG. Figure 2 As shown, a closed space is formed. However, the disadvantages of this technical solution are: (1) the workload of single-sided welding is increased. (2) When the mass of the first component 1 and the second component 2 is large, the existing fully aligned reinforcement structure may cause the lower reinforcement A of the first component 1 and the second component 2 to have a more complicated structure (such as T-shaped girder reinforcement with panel). Because the lower reinforcement A of the first component 1 and the second component 2 is thickened or increased, a larger narrow space is generated between the lower reinforcement A of the first component 1 and the second component 2 and the third component 3, which makes it impossible to perform welding and grinding. Utility Model Content
[0004] The utility model aims to provide a design structure for a narrow space of a marine base, which effectively solves the problems of large single-sided welding workload and a larger narrow space in the prior art solutions described in the background technology.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] A design structure for a narrow space of a ship base comprises a first component, a second component, a third component and a transition plate, wherein the lower ends of the first component and the second component are welded to the upper end of the transition plate by a butt weld to form a "Y"-shaped butt joint, a steel liner is attached to the inner side of the lower part of the first component and the second component, and the lower end of the transition plate is beveled and connected to the upper end of the third component.
[0007] Furthermore, the lower ends of the first component and the second component both have welding grooves.
[0008] Further, the outer side of the lower end of the first component and the outer side of the lower end of the second component are both aligned with the outer side of the transition plate.
[0009] Furthermore, the angle between the longitudinal axis of the first component and the longitudinal axis of the transition plate and the angle between the longitudinal axis of the second component and the longitudinal axis of the transition plate are both acute angles.
[0010] Further, the angle between the longitudinal axis of the first component and the longitudinal axis of the transition plate is equal to the angle between the longitudinal axis of the second component and the longitudinal axis of the transition plate.
[0011] Furthermore, the thickness of the first component and the thickness of the second component are both smaller than the thickness of the transition plate.
[0012] Further, the molten connection area of the steel liner and the transition plate on the first component does not overlap with the molten connection area of the steel liner and the transition plate on the second component.
[0013] Furthermore, the thickness of the transition plate is t1: Among them, t2 is the thickness of the first component, t3 is the thickness of the second component, d1 is the distance between the weld between the first component and the transition plate and the weld between the second component and the transition plate, and α is the angle between the longitudinal axis of the first component or the second component and the longitudinal axis of the transition plate.
[0014] Compared with the prior art, the beneficial technical effects of the utility model are:
[0015] The utility model uses a "Y"-shaped butt joint base reinforcement form. On the basis of conventional nodes, the platform structure under the original base is changed from a continuous form to a disconnected form, and the upper and lower angle joints are changed to Y-shaped butt joints. While meeting the structural strength requirements, it effectively reduces the difficulty of welding in narrow spaces, reduces the intersection of work types, reduces the number of reinforcement parts and the length of welds, and reduces the cost of purchasing raw materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the complete alignment reinforcement form adopted in the prior art.
[0017] Figure 2 It is a schematic diagram of the structure in which the first component and the second component adopted in the prior art are reinforced at the bottom to increase the installation angle and are corner-connected with the third component.
[0018] Figure 3 It is a schematic diagram of the design structure of the utility model for a narrow space of a marine base. DETAILED DESCRIPTION
[0019] A design structure for a narrow space on a marine base, such as Figure 3 As shown, it includes a first component 1, a second component 2, a third component 3 and a transition plate 4. The lower ends of the first component 1 and the second component 2 are welded to the upper end of the transition plate 4 to form a "Y"-shaped butt joint. A steel liner 5 is attached to the inner side of the lower part of the first component 1 and the second component 2, and the lower end of the transition plate 4 is beveled and connected to the upper end of the third component 3. In the utility model, the platform structure B is changed to a disconnected form, thereby ensuring the continuity and integrity of the transition plate 4.
[0020] In this embodiment, the lower ends of the first component 1 and the second component 2 both have welding grooves 6. The outer side of the lower end of the first component 1 and the outer side of the lower end of the second component 2 are both aligned with the outer side of the transition plate 4.
[0021] When butt welding is used on the outside of the first component 1 or the second component 2, the steel liner 5 on the inside of the corresponding component will be partially melted and welded to the transition plate 4, so that welding can be completed by only one-sided construction, avoiding grinding on the inside (narrow space) of the first component 1 and the second component 2, reducing construction difficulty and reducing cross-work.
[0022] In this embodiment, the angle between the longitudinal axis of the first component 1 and the longitudinal axis of the transition plate 4 and the angle between the longitudinal axis of the second component 2 and the longitudinal axis of the transition plate 4 are both acute angles. The angle between the longitudinal axis of the first component 1 and the longitudinal axis of the transition plate 4 and the angle between the longitudinal axis of the second component 2 and the longitudinal axis of the transition plate 4 are equal.
[0023] In this embodiment, the thickness of the first component 1 and the thickness of the second component 2 are both smaller than the thickness of the transition plate 4. The thickness of the upper end of the transition plate 4 is required to ensure that the melting connection area of the steel liner 5 on the first component 1 and the transition plate 4 does not overlap with the melting connection area of the steel liner 5 on the second component 2 and the transition plate 4, meeting the requirements of the classification society regulations.
[0024] like Figure 3 As shown, the thickness of the transition plate 4 is t1, and its calculation formula is as follows: (1), wherein t2 is the thickness of the first component 1, t3 is the thickness of the second component 2, d1 is the distance between the weld between the first component 1 and the transition plate 4 and the weld between the second component 2 and the transition plate 4, and α is the angle between the longitudinal axis of the first component 1 or the second component 2 and the longitudinal axis of the transition plate 4.
[0025] The thickness data of the transition plate 4 calculated according to formula (1) is only used as a reference for the preliminary selection of the plate thickness in the optimization design scheme. d1 is defined according to the requirements of the classification society rules. Under normal circumstances, d1>0. It is also necessary to perform strength verification of the finite element model according to the requirements of the rules to finally confirm the thickness of the transition plate 4 that meets the structural strength requirements.
[0026] The specific design method of the utility model includes: the lower ends of the first component 1 and the second component 2 are respectively welded to the upper end of the transition plate 4 on the outside by butt welds to form a "Y"-shaped butt joint, and the outer side of the lower end of the first component 1 and the outer side of the lower end of the second component 2 are aligned with the outer side of the transition plate 4. The inner side of the lower part of the first component 1 and the second component 2 is welded by attaching a steel liner 5, and the lower end of the transition plate 4 is beveled and connected to the upper end of the third component 3 after transition processing. After the construction is completed, the quality of the welds is inspected on the outer sides of the first component 1 and the second component 2.
[0027] The design structure of the narrow space of the marine base of the utility model is adopted. By using the "Y"-shaped docking base reinforcement form, on the basis of the conventional node, the platform structure B under the original base is changed from a continuous form to a disconnected form, and the upper and lower angle joints are changed to Y-shaped docking nodes. While meeting the structural strength requirements, the construction difficulty is effectively reduced, the number of reinforcement parts is reduced, the raw material procurement cost is reduced, the weld length is reduced, and the welding of narrow spaces is effectively avoided.
[0028] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A design structure for a narrow space of a marine base, characterized in that: It includes a first component, a second component, a third component and a transition plate. The lower ends of the first component and the second component are welded to the upper end of the transition plate by a butt weld to form a "Y"-shaped butt joint. Steel pads are attached to the inner sides of the lower parts of the first component and the second component. The lower end of the transition plate is beveled and connected to the upper end of the third component.
2. The design structure of the narrow space of the marine base according to claim 1 is characterized in that: The lower ends of the first component and the second component both have welding grooves.
3. The design structure of the narrow space of the marine base according to claim 1 is characterized in that: The outer side of the lower end of the first component and the outer side of the lower end of the second component are both aligned with the outer side of the transition plate.
4. The design structure of the narrow space of the marine base according to claim 1 is characterized in that: The angle between the longitudinal axis of the first component and the longitudinal axis of the transition plate and the angle between the longitudinal axis of the second component and the longitudinal axis of the transition plate are both acute angles.
5. The design structure of the narrow space of the marine base according to claim 4 is characterized in that: The angle between the longitudinal axis of the first component and the longitudinal axis of the transition plate and the angle between the longitudinal axis of the second component and the longitudinal axis of the transition plate are equal.
6. The design structure of the narrow space of the marine base according to claim 1 is characterized in that: The thickness of the first component and the thickness of the second component are both smaller than the thickness of the transition plate.
7. The design structure of the narrow space of the marine base according to claim 1 is characterized in that: The molten connection area of the steel liner and the transition plate on the first component does not overlap with the molten connection area of the steel liner and the transition plate on the second component.
8. The design structure of the narrow space of the marine base according to claim 5 is characterized in that: The thickness of the transition plate is t1: Among them, t2 is the thickness of the first component, t3 is the thickness of the second component, d1 is the distance between the weld between the first component and the transition plate and the weld between the second component and the transition plate, and α is the angle between the longitudinal axis of the first component or the second component and the longitudinal axis of the transition plate.