Large stainless steel rocket short cylinder precast slab, rocket short cylinder and storage tank structure

Abstract

The utility model discloses a large stainless steel rocket short cylinder precast slab, rocket short cylinder and storage box structure, at least comprises two short cylinder surface plates, the ends of the short cylinder surface plates close to each other are welded with each other to form a strip plate containing a first welding seam, each short cylinder surface plate comprises a plurality of first sub steel plates which are spliced with each other, and the first sub steel plates are welded with each other to form a plurality of second sub steel plates. Second welding seams which are parallel to each other are formed between the first sub-steel plates through laser welding, the second welding seams are staggered on the two sides of the first welding seam in the two welded short cylinder surface plates, and the second welding seams and the first welding seam are not perpendicular to each other. The structure can reduce the cost and improve the working efficiency.

Description

Technical Field

[0001] The utility model relates to the field of spacecrafts, and particularly to a large-sized stainless-steel rocket short cylinder prefabricated plate, a rocket short cylinder and a tank structure. Background Art

[0002] With the rapid development of the aerospace industry, various technologies involved in the rocket field have also advanced by leaps and bounds. The future development trend of launch vehicle technology will focus on improving performance, reducing costs, enhancing reliability and reusable performance, etc., which also brings new challenges to the manufacturing process of tanks.

[0003] On April 20, 2023, SpaceX launched the "Starship" rocket, marking the successful application of stainless-steel materials in the tanks of the SpaceX Starship rocket. In fact, before the Starship, there were precedents of using stainless steel to manufacture tanks in the rocket manufacturing field. For example, the tank of the Atlas D was welded from 301 stainless steel; the second-stage tank of the Delta was welded and manufactured using 410 stainless steel; the boosters of the Ariane 4 were welded and manufactured using stainless steel. The one with the largest usage and proportion of stainless steel is the SpaceX Starship launch vehicle. Most of the body of the Starship is made of 304L stainless steel, which is a common commercially available cold-rolled stainless steel and has obvious advantages in terms of improving performance, reducing costs, enhancing reliability and reusable performance.

[0004] Therefore, it is urgent to design a large-sized stainless-steel rocket short cylinder prefabricated plate and a rocket short cylinder, so as to process products using existing laser cutting equipment, prepare large-diameter rocket short cylinders, greatly reduce equipment costs, ensure the cutting accuracy of products, while reducing processing difficulty and improving work efficiency. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a large-sized stainless-steel rocket short cylinder prefabricated plate, which at least includes two short cylinder flat plates, and the mutually close ends of the short cylinder flat plates are welded to each other to form a long strip plate containing a first weld seam.

[0006] The short cylinder flat plate includes a plurality of first sub-steel plates spliced with each other. The first sub-steel plates are laser welded to form second weld seams parallel to each other. In the two short cylinder flat plates welded to each other, the second weld seams are on both sides of the first weld seam and are not connected to each other. Among them, the second weld seam and the first weld seam are not perpendicular to each other.

[0007] Further, the number of the short cylinder flat plates is E, where 2 ≤ E ≤ 3.

[0008] Further, the outer shape of the short cylinder flat plate is rectangular.

[0009] Further, the length of the short side of the short cylinder flat plate is F, and 1.2m ≤ F ≤ 1.6m.

[0010] Further, the number of the first sub-steel plates is C, where 8 ≤ C ≤ 16.

[0011] Further, the thickness of the first sub-steel plate is H, and 0.8㎜ ≤ H ≤ 4.2㎜.

[0012] Further, the included angle between the second weld seam and the first weld seam is A, satisfying 82° ≤ A ≤ 88°.

[0013] Further, the included angle between the second weld seam and the first weld seam is A, satisfying 83° ≤ A ≤ 87°.

[0014] The present utility model also provides a rocket short cylinder, comprising any one of the above-mentioned large stainless steel rocket short cylinder prefabricated plates. The rocket flat plates are welded to each other at the ends close to each other, and the ends far from each other are bent towards each other and welded and fixed to form a rocket short cylinder.

[0015] The present utility model also provides a storage tank structure, comprising any one of the above-mentioned rocket short cylinders, and a storage tank formed by welding a plurality of the rocket short cylinders in the axial direction.

[0016] Compared with the prior art, the present utility model has at least one of the following beneficial effects:

[0017] In this application, the ends of the short cylinder flat plates close to each other are welded to each other to form a long strip plate with a first weld seam, and the short cylinder flat plate comprises a plurality of first sub-steel plates spliced with each other. The first sub-steel plates are laser welded to form parallel second weld seams on both sides of the first weld seam and not connected to each other. Among them, the second weld seam and the first weld seam are not perpendicular to each other. By adopting this welding method, it is possible to effectively avoid the occurrence of cross weld seams at the positions of the first weld seam and the second weld seam during the preparation process of the rocket short cylinder, greatly improving the pressure-bearing performance of the short cylinder flat plate and avoiding the weld seam cracking of the short cylinder flat plate due to high pressure. In addition, the short cylinder preparation process for avoiding cross weld seams in this application can better ensure the stable and firm structure of the rocket short cylinder after the short cylinder flat plate is formed into a cylinder, further improving the safety of the rocket.

[0018] During the preparation process of the rocket short cylinder prefabricated flat plate or the rocket short cylinder in this application, first, the stainless steel plate is cut into small-sized products, and then the required products are obtained by using the splicing welding method. This not only enables the use of existing laser cutting equipment to process products, but also greatly reduces the equipment cost, ensures the cutting accuracy of the products, reduces the processing difficulty, and improves the work efficiency. Description of the Drawings

[0019] Figure 1 This is a schematic structural view of the short cylinder flat plate of the present utility model;

[0020] Figure 2 This is a simplified structural view of the rocket short cylinder of the present utility model;

[0021] Figure 3 This is a simplified structural view of the storage tank structure of the present utility model.

[0022] Explanation of reference numerals in the drawings:

[0023] 1 Short cylinder flat plate 2 First weld

[0024] 3 First sub-steel plate 4 Second weld

[0025] 5 Rocket short cylinder 6 Storage tank structure Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer and more understandable, the following will clearly explain the spirit of the content disclosed by the present utility model with reference to the drawings and detailed descriptions. After any person skilled in the relevant technical field understands the embodiments of the content of the present utility model, they can make changes and modifications based on the techniques taught by the content of the present utility model, and these changes and modifications do not deviate from the spirit and scope of the content of the present utility model.

[0027] The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but not to limit the present utility model. In addition, the same or similar reference numerals of elements / components used in the drawings and embodiments are used to represent the same or similar parts.

[0028] Regarding the "first", "second",... etc. used in this article, they do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish elements or operations described with the same technical terms.

[0029] Regarding the directional terms used in this article, such as: up, down, left, right, front or back, etc., they are only references to the directions in the drawings. Therefore, the directional terms used are for explanation and not for limiting this creation.

[0030] Regarding the "including", "comprising", "having", "containing", etc. used in this article, they are all open-ended terms, that is, they mean including but not limited to.

[0031] Regarding the "and / or" used in this article, it includes any one or all combinations of the described things.

[0032] Regarding terms such as "substantially" and "about" used herein, they are used to modify any quantity or error that can vary slightly, but these slight variations or errors do not change their essence. Generally, the range of slight variations or errors modified by such terms can be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values can be adjusted according to actual needs and are not limited thereto.

[0033] Certain terms used to describe this application will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this application.

[0034] In the existing manufacturing process of stainless - steel rocket tanks, for stainless - steel rockets with a short - cylinder diameter greater than or equal to 4500 mm, the developed length of the short - ring circumference reaches more than 14 meters. For short cylinders with a height of 4 m to 5 m, to manufacture short cylinders with an ultra - large diameter (6 to 10 meters and above) through traditional processes, the cutting accuracy requirements of the two - dimensional laser cutting platform are very high, which greatly increases the product processing difficulty and seriously affects the work efficiency. Therefore, it is necessary to improve the existing welding method of rocket short cylinders.

[0035] Please refer to Figure 1 、 Figure 2 and Figure 3 As shown in

[0036] Specifically, in this application, the mutually - approaching ends of the short - cylinder flat plates 1 are welded to each other to form a long strip plate containing the first weld seam 2, and the short - cylinder flat plate 1 includes a plurality of first sub - steel plates 3 spliced with each other. The first sub - steel plates 3 are laser - welded to form second weld seams 4 parallel to each other. Among the two short - cylinder flat plates welded to each other, the second weld seams 4 are staggered on both sides of the first weld seam 2, and the second weld seam 4 and the first weld seam 2 are not perpendicular to each other.

[0037] During the preparation of the rocket short tube of the present application, first, the stainless steel sheet is cut into small-sized products, and then the required products are obtained by means of splicing welding. This can effectively utilize the existing laser cutting equipment to process products, greatly reducing the equipment cost. While ensuring the cutting accuracy of the products, it reduces the processing difficulty and improves the work efficiency.

[0038] In actual application, when the number of short tube flat plates 1 is E and satisfies 2 ≤ E ≤ 3, it can better balance the production efficiency, processing difficulty and performance requirements of the short tube flat plates 1. In addition, the number of short tube flat plates 1 can also be adaptively adjusted according to the diameter size of the rocket short tube 5, further improving the adaptability of the working method of the present application to rocket short tubes 5 of different sizes.

[0039] To ensure the structural stability of the short tube flat plate 1 and facilitate the welding of the short tube flat plate 1, for example, the outer shape of the short tube flat plate 1 is rectangular.

[0040] To meet the strength of the short tube flat plate 1 while facilitating rapid cutting and production, for example, when the length of the short side of the short tube flat plate 1 is F and satisfies 1.2 m ≤ F ≤ 1.6 m; the thickness of the first sub-steel plate 3 is H and satisfies 0.8 mm ≤ H ≤ 4.2 mm, it can not only be quickly cut using the existing cutting platform, but also meet the pressure-bearing design requirements of the rocket storage tank. In addition, since the thickness parameter of the first sub-steel plate 3 directly affects the performance of the subsequent short tube 1, rocket short tube 5 and storage tank structure 6, through experimental verification, by setting the first sub-steel plate 3 to the above thickness, while improving the processing efficiency of the subsequent products and reducing the processing difficulty, the sub-products and final products in the process also have better mechanical properties.

[0041] In the same embodiment, to facilitate cutting and quickly produce the short tube flat plate 1, for example, the number of the first sub-steel plates 3 is 8 ≤ C ≤ 24. Through a large amount of data experimental analysis, when the number of the first sub-steel plates 3 is C and satisfies 8 ≤ C ≤ 16, it is not only convenient to cut and weld the first sub-steel plates 3, but also convenient for the subsequent production of the rocket short tube 5, greatly improving the work efficiency.

[0042] It should be noted that to ensure the structural stability of the short tube flat plate 1 and make the rocket short tube 5 have high compressive capacity when the rocket short tube 5 is made, and to prevent the rocket short tube 5 from cracking at the weld, for example, the included angle between the second weld 4 and the first weld 1 is the first included angle A.

[0043] To facilitate the welding of the short cylindrical flat plates, avoid the occurrence of cross welds in the first and second welds, and ensure firm welding between the short cylindrical flat plates 1, through a large amount of experimental data, it is obtained that when the included angle between the second weld 4 and the first weld 2 is the first included angle A and satisfies 82° ≤ A ≤ 88°, the first and second welds are welded more firmly, the short cylindrical flat plates are more firmly fixed, and the strength of the rocket short cylinder, especially the overall strength of the welded structure, is greater.

[0044] As Figure 1 shown, when the included angle between the second weld 4 and the first weld 2 is the first included angle A and satisfies 83° ≤ A ≤ 87°, after the short cylindrical flat plates 1 support the rocket, the pressure on the first and second welds on the inner wall of the rocket short cylinder 5 can be better dispersed, avoiding cracking of the rocket short cylinder 5 during the use of the rocket, and ensuring the stability of the rocket short cylinder structure.

[0045] As Figure 1 and Figure 2 shown, the present invention also provides a rocket short cylinder 5, which includes any one of the above large stainless steel rocket short cylinder prefabricated plates. The mutually adjacent ends of the short cylindrical flat plates 1 are welded to each other, and the mutually remote ends are bent towards each other and then welded and fixed to form the rocket short cylinder 5.

[0046] As Figure 3 shown, the present invention also provides a storage tank structure 6, which includes any one of the above rocket short cylinders 5, and a storage tank formed by welding a plurality of rocket short cylinders 5 in the axial direction.

[0047] The above embodiments can be combined with each other and have corresponding technical effects.

[0048] The above description is only a schematic specific embodiment of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by any person skilled in the art shall fall within the scope of protection of the present invention.

Claims

1. A large stainless steel rocket short tube prefabricated plate, characterized in that: At least two short cylindrical plane plates are welded to each other at their close ends to form a long strip plate containing a first weld seam. The short-cylinder flat plate comprises a plurality of first sub-steel plates spliced ​​to each other, and second welds parallel to each other are formed by laser welding between the first sub-steel plates. In the two short-cylinder flat plates welded to each other, the second welds are staggered on both sides of the first welds, wherein the second welds are not perpendicular to the first welds.

2. The large stainless steel rocket tube prefabricated plate according to claim 1 is characterized in that: The number of the short-tube plane plates is E, where 2≤E≤3.

3. The large stainless steel rocket tube prefabricated plate according to claim 1 is characterized in that: The short-tube flat plate has a rectangular shape.

4. The large stainless steel rocket tube prefabricated plate according to claim 3 is characterized in that: The short side length of the short cylindrical plane plate is F, 1.2m≤F≤1.6m.

5. The large stainless steel rocket tube prefabricated plate according to claim 4 is characterized in that: The number of the first sub-steel plates is C, where 8≤C≤16.

6. The large stainless steel rocket tube prefabricated plate according to claim 4 is characterized in that: The thickness of the first sub-steel plate is H, 0.8 mm≤H≤4.2 mm.

7. The large stainless steel rocket tube prefabricated plate according to claim 1 is characterized in that: The angle between the second weld and the first weld is A, satisfying 82°≤A≤88°.

8. The large stainless steel rocket tube prefabricated plate according to claim 7 is characterized in that: The angle between the second weld and the first weld is A, satisfying 83°≤A≤87°.

9. A rocket launcher, characterized in that: The large stainless steel rocket tube prefabricated plate comprises any one of claims 1 to 8, wherein the large stainless steel rocket tube prefabricated plates are welded to each other at the ends close to each other, and the ends far away from each other are bent to one side and tightly attached to each other and then welded to form a rocket tube.

10. A tank structure, characterized in that: A tank comprising the rocket tube as described in claim 9, wherein a plurality of said rocket tubes are welded in an axial direction to form the tank.

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