External pressure tunnel pipe and rocket fuel tank

Abstract

The utility model discloses an external pressure tunnel pipe, which is used for a rocket fuel tank. The external pressure tunnel pipe includes a tube body, and a plurality of first corrugated structures and a plurality of second corrugated structures are arranged on the tube wall of the tube body. The first corrugated structures and the second corrugated structures are arranged around the tube body respectively. The plurality of first corrugated structures are arranged at intervals along the axial direction of the tube body, and at least two second corrugated structures are arranged between two adjacent first corrugated structures. Along the radial direction of the tube body, the height of the first corrugated structure is greater than the height of the second corrugated structure. According to the external pressure tunnel pipe of the utility model, a plurality of first corrugated structures and a plurality of second corrugated structures are arranged on the tube body. By arranging the plurality of first corrugated structures and the plurality of second corrugated structures, the overall shrinkage and deformation capability of the tank body is enhanced, and the ability to withstand external pressure is also improved, so that the fatigue life of the tunnel pipe can be improved, and the reliability of the tunnel pipe is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection components, in particular to an external pressure tunnel pipe and a rocket fuel storage tank. Background Art

[0002] The tunnel pipe is a component inside the rocket tank. The tunnel pipe must withstand the pressure of the rocket fuel in the rocket tank. A pipe passes through its inner cavity. The tunnel pipe is subjected to external pressure, and the pipe inside the tunnel pipe is used for other fuels to pass through.

[0003] The existing tunnel pipe structure has poor ability to withstand external pressure and low fatigue life, which reduces its reliability during use. Utility Model Content

[0004] The purpose of the utility model is to at least solve the problem of how to improve the tunnel pipe structure strength and ability to withstand external pressure, improve fatigue life and reliability during use. This purpose is achieved through the following technical solutions:

[0005] The first aspect of the utility model proposes an external pressure tunnel pipe for a rocket fuel tank, the external pressure tunnel pipe comprising a tube body, a tube wall of the tube body being provided with a plurality of first corrugated structures and a plurality of second corrugated structures, the first corrugated structures and the second corrugated structures being respectively arranged around the tube body, the plurality of first corrugated structures being arranged at intervals along the axial direction of the tube body, at least two second corrugated structures being arranged between two adjacent first corrugated structures, and along the radial direction of the tube body, the height of the first corrugated structure being greater than the height of the second corrugated structure.

[0006] According to the external pressure tunnel pipe of the utility model, a plurality of first corrugated structures and a plurality of second corrugated structures are arranged on the pipe body. By arranging the plurality of first corrugated structures and the plurality of second corrugated structures, the overall shrinkage and deformation capability of the tank body is enhanced, and the ability to withstand external pressure is also improved, thereby increasing the fatigue life of the tunnel pipe and effectively improving the reliability of the tunnel pipe.

[0007] In addition, the external pressure tunnel pipe according to the utility model may also have the following additional technical features:

[0008] In some embodiments of the present invention, the plurality of first corrugated structures are arranged at equal intervals on the tube body.

[0009] In some embodiments of the present invention, all of the second wave structures located between two adjacent first wave structures are arranged continuously to form a continuous wave structure.

[0010] In some embodiments of the present invention, one end of the continuous wave structure is connected to the first wave structure on one side, and the other end of the continuous wave structure is connected to the first wave structure on the other side.

[0011] In some embodiments of the present invention, two adjacent first waveform structures form a distribution area, and the number of the second waveform structures in two adjacent distribution areas is equal.

[0012] In some embodiments of the present invention, the external pressure tunnel pipe further includes a first connecting piece, which is connected to one end of the pipe body and is used to communicate with the external pipe body.

[0013] In some embodiments of the present invention, the external pressure tunnel pipe further includes a second connecting piece, and the first connecting piece is connected to one end of the pipe body and is used to communicate with the external pipe body.

[0014] In some embodiments of the present invention, the first connecting member is a first flange;

[0015] And / or, the second connecting member is a second flange.

[0016] In some embodiments of the present utility model, the first connecting member is fixed to the tube body by welding;

[0017] And / or, the second connecting member is fixed to the tube body by welding;

[0018] And / or, among the tube body, the first connecting member and the second connecting member, at least the tube body is made of stainless steel.

[0019] A second aspect of the utility model provides a rocket fuel tank, which includes the external pressure tunnel pipe as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 The structure diagram (cross-sectional view) of the rocket fuel tank according to the utility model is schematically shown;

[0022] Figure 2 for Figure 1 Schematic diagram (cross-sectional view) of the structure of the external pressure tunnel tube in the rocket fuel tank shown in .

[0023] The reference numerals are as follows:

[0024] 100. Rocket fuel tank;

[0025] 10. Box body;

[0026] 11. First interface; 12. Second interface;

[0027] 20. A first internal tube;

[0028] 30. A second internal tube;

[0029] 40. Bellows;

[0030] 50. External pressure tunnel pipe;

[0031] 51. Pipe body;

[0032] 511, first waveform structure; 512, second waveform structure;

[0033] 52. A first connecting member;

[0034] 53. A second connecting member;

[0035] 60. Fuel pipe. DETAILED DESCRIPTION

[0036] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0037] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0038] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0039] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0040] like Figure 1 and Figure 2 As shown, according to an embodiment of the utility model, an external pressure tunnel pipe 50 is proposed, which includes a tube body 51, and a plurality of first corrugated structures 511 and a plurality of second corrugated structures 512 are provided on the tube wall of the tube body 51, the first corrugated structures 511 and the second corrugated structures 512 are respectively arranged around the tube body 51, and the plurality of first corrugated structures 511 are arranged at intervals along the axial direction of the tube body 51, and at least two second corrugated structures 512 are arranged between two adjacent first corrugated structures 511, and along the radial direction of the tube body 51, the height of the first corrugated structure 511 is greater than the height of the second corrugated structure.

[0041] Specifically, the tube body 51 is a circular structure, and multiple first corrugated structures 511 and multiple second corrugated structures 512 are all arranged on the tube body 51, and the multiple first corrugated structures 511 and multiple second corrugated structures 512 are all arranged at intervals in the axial direction of the tube body 51, wherein a second corrugated structure 512 is arranged between two adjacent first corrugated structures 511, and the number of second corrugated structures 512 is at least two.

[0042] In the radial direction of the tube body 51, the height of the first corrugated structure 511 is greater than the height of the second corrugated structure 512. By arranging the second corrugated structure 512 between two adjacent first corrugated structures 511, the structural strength of the tube body 51 located between two adjacent first corrugated structures 511 is enhanced, thereby improving the ability to resist external pressure.

[0043] In addition, in the present application, the direction in which the first corrugated structure 511 surrounds the tube body 51 is consistent with the circumferential direction of the tube body 51 , and the direction in which the second corrugated structure 512 surrounds the tube body 51 is also consistent with the circumferential direction of the tube body 51 .

[0044] In the present application, a plurality of first corrugated structures 511 and a plurality of second corrugated structures 512 are arranged on the tube body 51. By arranging the plurality of first corrugated structures 511 and the plurality of second corrugated structures 512, the overall shrinkage and deformation capability of the tank body is enhanced, and the ability to withstand external pressure is also improved, thereby increasing the fatigue life of the tunnel tube and effectively improving the reliability of the tunnel tube.

[0045] It should be pointed out that, based on the structure of the tube body 51 in the present application, when in use, its elongation rate can reach more than 45%, thereby effectively improving the ability of the external pressure tunnel tube 50 to withstand external pressure.

[0046] In some embodiments of the present invention, Figure 2 As shown, a plurality of first corrugated structures 511 are arranged at equal intervals on the tube body 51. The plurality of first corrugated structures 511 are arranged at equal intervals on the tube body 51 along the axial direction of the tube body 51. By arranging the plurality of first corrugated structures 511 at equal intervals on the tube body 51, not only can the problem of shrinkage and deformation of the pipeline be compensated, but also the ability of the entire pipeline to withstand external pressure can be enhanced.

[0047] In some embodiments of the present invention, Figure 2 As shown, all the second corrugated structures 512 between two adjacent first corrugated structures 511 are continuously arranged to form a continuous corrugated structure. Specifically, all the second corrugated structures 512 between two adjacent first corrugated structures 511 are continuously arranged to form a continuous corrugated structure, which further enhances the ability of the pipeline to withstand external pressure, thereby increasing the fatigue life of the tunnel pipe and improving the safety of the pipeline.

[0048] In some embodiments of the present invention, Figure 2As shown, one end of the continuous corrugated structure is connected to the first corrugated structure 511 on one side, and the other end of the continuous corrugated structure is connected to the first corrugated structure 511 on the other side. Specifically, the continuous corrugated structure formed by two adjacent first corrugated structures 511 and a plurality of second corrugated structures 512 located therebetween makes the first corrugated structures 511 and the second corrugated structures 512 form a continuous stable structure, further improving the stability of the overall structure, and further enhancing the ability of the tube body 51 to withstand external pressure.

[0049] In some embodiments of the present invention, Figure 2 As shown, two adjacent first corrugated structures 511 form a distribution area, and the number of second corrugated structures 512 in the two adjacent distribution areas is equal. By setting the number of second corrugated structures 512 in the two adjacent distribution areas, the stability of the overall structure can be further improved, so that the ability of the tube body 51 to withstand external pressure is further enhanced.

[0050] In some embodiments of the present invention, Figure 2 As shown, the external pressure tunnel pipe 50 further includes a first connector 52, which is connected to one end of the pipe body 51 and is used to communicate with the external pipe body 51. The first connector 52 is provided and connected to the external pipe body 51 by the first connector 52, thereby improving the convenience of installation.

[0051] It should be noted that the first connecting member 52 may be a clamping member or a flange member.

[0052] In some embodiments of the present invention, Figure 2 As shown, the external pressure tunnel pipe 50 further includes a second connector 53, and the first connector 52 is connected to one end of the pipe body 51 and is used to communicate with the external pipe body 51. The second connector 53 is provided and connected to the external pipe body 51, thereby improving the convenience of installation.

[0053] In some embodiments of the present invention, Figure 2 As shown, the first connecting member 52 is a first flange. Specifically, the first connecting member 52 is set as a first flange, so that the first connecting member 52 can be easily connected and fixed with the external pipeline during use, so that the assembly efficiency is improved. In addition, the connection structure formed by the first flange is stable and has good sealing performance.

[0054] In some embodiments of the present invention, Figure 2As shown, the second connecting member 53 is a second flange. Specifically, the second connecting member 53 is set as a second flange, so that the second connecting member 53 can be easily connected and fixed with the external pipeline during use, so that the assembly efficiency is improved. In addition, the connection structure formed by the first flange is stable and has good sealing performance.

[0055] In some embodiments of the present invention, the first connector 52 is fixed to the tube body 51 by welding. The welding method has a stable structure and strong pressure resistance, which can effectively improve the overall pressure resistance of the external pressure tunnel tube 50. The welding method has a stable structure and strong pressure resistance, which can effectively improve the overall pressure resistance of the external pressure tunnel tube 50.

[0056] In some embodiments of the present invention, the second connecting member 53 is fixed to the tube body 51 by welding.

[0057] In some embodiments of the utility model, among the pipe body 51, the first connecting member 52 and the second connecting member 53, at least the pipe body 51 is a stainless steel member. 0Cr19Ni10 stainless steel is selected, which has good welding performance, and the weld strength can reach more than 95% of the parent material, and has good toughness. The good weldability and high elongation of this material simplify the manufacturing process of the tunnel pipe and greatly reduce the manufacturing cost.

[0058] In addition, precisely because of the material characteristics and structural characteristics of the external pressure tunnel tube 50, the external pressure tunnel tube 50 can be reused, providing reliable parts for future returning rockets.

[0059] like Figure 1 and Figure 2 As shown, the second aspect of the present invention proposes a rocket fuel tank 100, which includes the external pressure tunnel pipe 50 as described above.

[0060] Furthermore, the rocket fuel tank 100 also includes a box body 10, a first built-in tube 20, a second built-in tube 30 and a bellows 40, wherein the box body 10 is provided with a first interface 11, a second interface 12, a first through hole and a second through hole, the first built-in tube 20 is arranged inside the box body 10 and is welded and fixed to the first through hole, the second built-in tube 30 is arranged inside the box and is welded and fixed to the second through hole, the first built-in tube 20 and the second built-in tube 30 are coaxially arranged, one end of the bellows 40 is flange-connected to the other end of the first built-in tube 20, one end of the external pressure tunnel tube 50 is flange-connected to the other end of the bellows 40, and the other end of the external pressure tunnel tube 50 is flange-connected to the other end of the second built-in tube 30.

[0061] The first built-in tube 20, the bellows 40, the external pressure tunnel tube 50, the second built-in tube 30 and the inner wall of the box body 10 do not go out of the fuel tank. The fuel tank is respectively connected to the first interface 11 and the second interface 12 and is used to store a type of fuel. A penetration channel is formed inside the first built-in tube 20, the bellows 40, the external pressure tunnel tube 50 and the second built-in tube 30, and the penetration channel is for the fuel pipe 60 of other fuels to penetrate.

[0062] By arranging a plurality of first corrugated structures 511 and a plurality of second corrugated structures 512 on the tube body 51 of the external pressure tunnel tube 50, and by arranging the plurality of first corrugated structures 511 and the plurality of second corrugated structures 512, the overall shrinkage and deformation capability of the tank body is enhanced, and the ability to withstand external pressure is also improved, thereby increasing the fatigue life of the tunnel tube and effectively improving the reliability of the tunnel tube.

[0063] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An external pressure tunnel pipe for rocket fuel tank, characterized in that: The external pressure tunnel pipe includes a pipe body, and a plurality of first corrugated structures and a plurality of second corrugated structures are provided on the pipe wall of the pipe body. The first corrugated structures and the second corrugated structures are respectively arranged around the pipe body. The plurality of first corrugated structures are arranged at intervals along the axial direction of the pipe body, and at least two second corrugated structures are arranged between two adjacent first corrugated structures. Along the radial direction of the pipe body, the height of the first corrugated structure is greater than the height of the second corrugated structure.

2. The external pressure tunnel pipe according to claim 1, characterized in that: The plurality of first corrugated structures are arranged at equal intervals on the tube body.

3. The external pressure tunnel pipe according to claim 2, characterized in that: All of the second wave structures located between two adjacent first wave structures are arranged continuously to form a continuous wave structure.

4. The external pressure tunnel pipe according to claim 3, characterized in that: One end of the continuous wave structure is connected to the first wave structure on one side, and the other end of the continuous wave structure is connected to the first wave structure on the other side.

5. The external pressure tunnel pipe according to claim 2, characterized in that: Two adjacent first wave structures form a distribution area, and the number of the second wave structures in two adjacent distribution areas is equal.

6. The external pressure tunnel pipe according to any one of claims 1 to 5, characterized in that: The external pressure tunnel pipe also includes a first connecting piece, which is connected to one end of the pipe body and is used to communicate with the external pipe body.

7. The external pressure tunnel pipe according to claim 6, characterized in that: The external pressure tunnel pipe also includes a second connecting piece, and the first connecting piece is connected to one end of the pipe body and is used to communicate with the external pipe body.

8. The external pressure tunnel pipe according to claim 7, characterized in that: The first connecting member is a first flange; And / or, the second connecting member is a second flange.

9. The external pressure tunnel pipe according to claim 7, characterized in that: The first connecting member is welded and fixed to the tube body; And / or, the second connecting member is fixed to the tube body by welding; And / or, among the tube body, the first connecting member and the second connecting member, at least the tube body is made of stainless steel.

10. A rocket fuel tank, characterized in that: The rocket fuel tank comprises the external pressure tunnel tube according to any one of claims 1 to 9.

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