A cold screen structure and low-temperature fluid transmission pipeline

Abstract

The present application discloses a cold screen structure and a cryogenic fluid transmission pipeline, which relate to the field of cryogenic transportation technology. The cold screen structure includes a first main body portion and a second main body portion relative to each other, the first main body portion includes a first end and a second end, and the second main body portion includes a third end and a fourth end; the first end is opposite to the third end, one of the first end and the third end is connected to a first cold pipe, and the other is connected to a first positioning plate, the first positioning plate is provided with a first positioning groove, and the first cold pipe is positioned in the first positioning groove; the second end is opposite to the fourth end, one of the second end and the fourth end is connected to a second cold pipe, and the other is connected to a second positioning plate, the second positioning plate is provided with a second positioning groove, and the second cold pipe is positioned in the second positioning groove. The cold screen structure provided by the present application can improve assembly efficiency and increase production capacity.

Description

Technical Field

[0001] The present application relates to the field of cryogenic transportation technology, and in particular to a cold screen structure and a cryogenic fluid transmission pipeline. Background Art

[0002] Cryogenic fluids such as liquid oxygen (90.2K), liquid nitrogen (77.4K), liquid hydrogen (20.4K), and liquid helium (4.2K) are widely used in industry and scientific research. During use, cryogenic fluids are typically transported from cryogenic storage tanks (such as Dewars) to a designated location via pipelines.

[0003] When transporting cryogenic fluids through pipelines, the temperature of the cryogenic fluid is lower than that of the surrounding environment. According to the law of thermal radiation, the external environment will continuously transfer heat to the cryogenic fluid in the form of thermal radiation, resulting in cooling loss of the cryogenic fluid. To reduce cooling loss during cryogenic fluid transmission, cold shields can be used to block heat radiation from the external environment to the cryogenic fluid.

[0004] However, when assembling the existing cold screen, it is impossible to ensure that the various parts of the cold screen are accurately aligned. On the one hand, this affects the welding efficiency of the cold screen, and on the other hand, it can also reduce the welding yield and affect the product yield. Summary of the Invention

[0005] The present application provides a cold shield structure and a cryogenic fluid transmission pipeline to facilitate the installation of the cold shield structure.

[0006] The present application provides a cold shield structure, comprising a first body portion and a second body portion opposite to each other, wherein the first body portion comprises a first end and a second end, and the second body portion comprises a third end and a fourth end;

[0007] The first end is opposite to the third end, one of the first end and the third end is connected to a first cooling pipe, and the other is connected to a first positioning plate, the first positioning plate is provided with a first positioning groove, and the first cooling pipe is positioned in the first positioning groove;

[0008] The second end is opposite to the fourth end, one of the second end and the fourth end is connected to a second cooling pipe, and the other is connected to a second positioning plate, the second positioning plate is provided with a second positioning groove, and the second cooling pipe is positioned in the second positioning groove.

[0009] Based on the above technical solution, when assembling the first main body and the second main body, the positioning arrangement between the first cold pipe and the first positioning plate can prevent the first cold pipe and the first positioning plate from shaking at will, and can facilitate further connection and fixation of the first cold pipe and the first positioning plate, such as welding and other operations. Similarly, the positioning arrangement between the second cold pipe and the second positioning plate can prevent the second cold pipe and the second positioning plate from shaking at will, and can facilitate further connection and fixation of the second cold pipe and the second positioning plate, such as welding and other operations. That is, the present application can realize the assembly between the first main body and the second main body by a positioning method. On the one hand, it can ensure the assembly accuracy, and on the other hand, it can also improve the assembly efficiency and increase the production capacity. At the same time, in the present application, the first cold pipe and the second cold pipe are arranged at the connection position of the first main body and the second main body, which can improve the overall space utilization of the low-temperature fluid transmission pipeline and reduce space waste.

[0010] In some possible implementations, the first end is connected to the first positioning plate, and the third end is connected to the first cooling pipe;

[0011] The second end is connected to the second cooling pipe, and the fourth end is connected to the second positioning plate.

[0012] In some possible implementations, the first cooling tube is a circular tube, and the first positioning plate is configured as an arc-shaped plate to form the first arc-shaped positioning groove.

[0013] In some possible implementations, the first positioning groove is arc-shaped, and the inner diameter of the first positioning groove is equal to the outer diameter of the first cooling pipe.

[0014] In some possible implementations, a first opening structure is further configured on a side of the first positioning groove away from the first main body portion, and a distance between two side edges of the first opening structure parallel to the axial direction of the cold shield structure is equal to an outer diameter of the first cold pipe.

[0015] In some possible implementations, the second cooling tube is a circular tube, and the second positioning plate is configured as an arc-shaped plate to form an arc-shaped second positioning groove.

[0016] In some possible implementations, the second positioning groove is arc-shaped, and the inner diameter of the second positioning groove is equal to the outer diameter of the second cooling pipe.

[0017] In some possible embodiments, a second opening structure is further configured on a side of the second positioning groove away from the second main body portion, and the distance between two side edges of the second opening structure parallel to the axial direction of the cold shield structure is equal to the outer diameter of the second cold pipe.

[0018] In addition, the present application also provides a cryogenic fluid transmission pipeline, comprising the cold shield structure provided in the above embodiments.

[0019] In some possible implementations, the cryogenic fluid transmission pipeline further includes a first transmission pipe and a second transmission pipe;

[0020] The first transmission pipe is located in the cold shield structure and is spaced apart from the cold shield structure;

[0021] The second transmission pipe is sleeved outside the cold shield structure and is spaced apart from the cold shield structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Shows a schematic cross-sectional structure diagram of a cold shield structure in some embodiments;

[0024] Figure 2 Shows a schematic diagram of the exploded structure of the cold shield structure in some embodiments;

[0025] Figure 3 Shows a schematic diagram of the exploded structure of the cold shield structure in some other embodiments;

[0026] Figure 4 Schematic diagrams of the cross-sectional structure of cryogenic fluid transmission pipelines in some embodiments are shown.

[0027] Description of main component symbols:

[0028] 1000-cold screen structure;

[0029] 100 - first body portion; 110 - first end; 120 - second end;

[0030] 200 - second body portion; 210 - third end; 220 - fourth end;

[0031] 310 - first cooling pipe; 320 - first positioning plate; 321 - first positioning groove; 3211 - first opening structure; 330 - second cooling pipe; 340 - second positioning plate; 341 - second positioning groove; 3411 - second opening structure;

[0032] 2100-first transmission tube; 2200-second transmission tube. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0037] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] like Figure 1 and Figure 4 As shown, a cold shield structure 1000 is provided in an embodiment, which can be used in a cryogenic fluid transmission pipeline to block heat radiation from the external environment to the cryogenic fluid in the cryogenic fluid transmission pipeline.

[0039] like Figure 1 As shown, the cold shield structure 1000 may include a first body portion 100 and a second body portion 200. Both the first body portion 100 and the second body portion 200 are arc-shaped. The first body portion 100 and the second body portion 200 are disposed opposite each other, with the concave surface of the first body portion 100 facing the concave surface of the second body portion 200. It is understood that the first body portion 100 and the second body portion 200 cooperate to form a generally tubular structure.

[0040] Combined together Figure 2 In addition, the first body portion 100 may include a first end 110 and a second end 120. The second body portion 200 may include a third end 210 and a fourth end 220. In an embodiment, the first end 110 of the first body portion 100 may be opposite to the third end 210 of the second body portion 200. The second end 120 of the first body portion 100 may be opposite to the fourth end 220 of the second body portion 200.

[0041] In some embodiments, one of the first end 110 of the first body portion 100 and the third end 210 of the second body portion 200 is connected to a first cooling pipe 310, while the other is connected to a first positioning plate 320. Furthermore, a first positioning groove 321 is disposed on the first positioning plate 320, and the first positioning groove 321 can face the direction of the first cooling pipe 310. The first cooling pipe 310 can be positioned in the first positioning groove 321.

[0042] A second cooling pipe 330 is connected to one of the second end 120 of the first body 100 and the fourth end 220 of the second body 200, while the other is connected to a second positioning plate 340. A second positioning groove 341 is disposed on the second positioning plate 340, facing toward the second cooling pipe 330. In this embodiment, the second cooling pipe 330 is positioned in the second positioning groove 341.

[0043] In an embodiment, when assembling the cold shield structure 1000, the first cold pipe 310 can be positioned in the first positioning groove 321 of the first positioning plate 320, thereby achieving pre-positioning of the first cold pipe 310 and the first positioning plate 320, thereby facilitating further connection operations between the first cold pipe 310 and the first positioning plate 320, and preventing the first end 110 of the first body portion 100 and the third end 210 of the second body portion 200 from shaking freely, thereby affecting assembly efficiency. Similarly, the second cold pipe 330 can be positioned in the second positioning groove 341 of the second positioning plate 340, thereby achieving pre-positioning between the second cold pipe 330 and the second positioning plate 340, thereby facilitating further connection operations between the second cold pipe 330 and the second positioning plate 340, and preventing the second end 120 of the first body portion 100 and the fourth end 220 of the second body portion 200 from shaking freely, thereby affecting assembly efficiency. That is, in the embodiment, through the positioning connection between the first cold pipe 310 and the first positioning plate 320 and the positioning connection between the second cold pipe 330 and the second positioning plate 340, the first main body 100 and the second main body 200 can be quickly aligned and installed, thereby improving the installation efficiency between the first main body 100 and the second main body 200.

[0044] Combined together Figure 4 In addition, compared with the solution of setting the cold pipe inside or outside the cold screen in the traditional cold screen, the first cold pipe 310 and the second cold pipe 330 are set at the connection between the first main body 100 and the second main body 200 in this application. When the cold screen structure 1000 is applied to the low-temperature fluid transmission pipeline, the overall space utilization rate of the low-temperature fluid transmission pipeline can be significantly improved, reducing space waste.

[0045] like Figure 1 and Figure 2 As shown, in some embodiments, the first end 110 of the first body portion 100 is connected to a first positioning plate 320, and the second end 120 of the first body portion 100 is connected to a second cooling pipe 330. Correspondingly, the third end 210 of the second body portion 200 is connected to the first cooling pipe 310, and the fourth end 220 of the second body portion 200 is connected to a second positioning plate 340.

[0046] It is understood that the first positioning plate 320 and the second cold pipe 330 can both extend axially along the cold shield structure 1000 and can have the same extension length as the first body portion 100. The second positioning plate 340 and the first cold pipe 310 can also extend axially along the cold shield structure 1000 and can have the same extension length as the second body portion 200.

[0047] In some embodiments, the first cooling tube 310 is a circular tube, that is, a cross section of the first cooling tube 310 perpendicular to the axis of the first cooling tube 310 may be in the shape of a circular ring.

[0048] The first positioning plate 320 can be shaped like a circular arc. The projection of the inner sidewall of the first positioning plate 320 onto a plane perpendicular to the axis of the first positioning plate 320 can be a circular portion. Accordingly, the first positioning groove 321 can be shaped like a circular arc. The inner diameter of the first positioning groove 321 can be equal to the outer diameter of the first cooling pipe 310. When the first cooling pipe 310 is positioned in the first positioning groove 321, the outer wall of the first cooling pipe 310 can conform to the inner wall of the first positioning groove 321.

[0049] In other embodiments, the first positioning plate 320 may be an elliptical arc-shaped plate. The first positioning groove 321 may also be an elliptical arc-shaped groove. The first cooling pipe 310 may be disposed in the first positioning groove 321, and at least a portion of the sidewall of the first cooling pipe 310 may be aligned with the inner wall of the first positioning groove 321.

[0050] like Figure 2 As shown, further, a first opening structure 3211 is configured on a side of the first positioning groove 321 away from the first body portion 100. The first opening structure 3211 can extend from one end of the first positioning plate 320 to the other end along the axial direction of the cold shield structure 1000.

[0051] Furthermore, the distance between the two sides of the first opening structure 3211 parallel to the axial direction of the cold shield structure 1000 can be equal to the outer diameter of the first cooling pipe 310. It is understood that when the first cooling pipe 310 is positioned in the first positioning groove 321, half of the first cooling pipe 310 can be accommodated in the first positioning groove 321. This prevents the first cooling pipe 310 from escaping from the first positioning groove 321 while also allowing for smooth assembly of the first cooling pipe 310 in the first positioning groove 321.

[0052] In other embodiments, the distance between the two side edges of the first opening structure 3211 parallel to the axial direction of the cold shield structure 1000 may also be smaller than the outer diameter of the first cold pipe 310, and when the first cold pipe 310 is assembled in the first positioning groove 321, less than half of the first cold pipe 310 is accommodated in the first positioning groove 321.

[0053] In an embodiment, the first cold pipe 310 and the first positioning plate 320 can be further fixedly connected by welding or crimping, which can seal the interior of the cold shield structure relative to the external environment and further block external heat from being transmitted into the interior of the cold shield structure 1000.

[0054] In some embodiments, the second cooling tube 330 is a circular tube, that is, a cross section of the second cooling tube 330 perpendicular to the axial direction of the second cooling tube 330 is in the shape of a circular ring.

[0055] The second positioning plate 340 can be shaped like a circular arc. The projection of the inner sidewall of the second positioning plate 340 onto a plane perpendicular to the axis of the second positioning plate 340 can be a circular portion. Accordingly, the second positioning groove 341 can be shaped like a circular arc. The inner diameter of the second positioning groove 341 can be equal to the outer diameter of the second cooling pipe 330. When the second cooling pipe 330 is positioned in the second positioning groove 341, the outer wall of the second cooling pipe 330 can conform to the inner wall of the second positioning groove 341.

[0056] In other embodiments, the second positioning plate 340 may be an elliptical arc-shaped plate. The second positioning groove 341 may also be an elliptical arc-shaped groove. The second cooling pipe 330 may be disposed in the second positioning groove 341, and at least a portion of the sidewall of the second cooling pipe 330 may be aligned with the inner wall of the second positioning groove 341.

[0057] like Figure 2 As shown, further, a second opening structure 3411 is configured on a side of the second positioning groove 341 away from the second body portion 200. The second opening structure 3411 can extend from one end of the second positioning plate 340 to the other end along the axial direction of the cold shield structure 1000.

[0058] Furthermore, the distance between the two sides of the second opening structure 3411 parallel to the axial direction of the cold shield structure 1000 can be equal to the outer diameter of the second cooling pipe 330. It will be appreciated that when the second cooling pipe 330 is positioned in the second positioning groove 341, half of the second cooling pipe 330 can be accommodated in the second positioning groove 341. This prevents the second cooling pipe 330 from escaping from the second positioning groove 341 while also allowing for smooth assembly of the second cooling pipe 330 in the second positioning groove 341.

[0059] In other embodiments, the distance between the two side edges of the second opening structure 3411 parallel to the axial direction of the cold shield structure 1000 may also be smaller than the outer diameter of the second cold pipe 330, and when the second cold pipe 330 is assembled in the second positioning groove 341, less than half of the second cold pipe 330 is accommodated in the second positioning groove 341.

[0060] In an embodiment, the second cold pipe 330 and the second positioning plate 340 can be further fixedly connected by welding or crimping, which can seal the interior of the cold shield structure relative to the external environment and further block the transmission of external heat to the interior of the cold shield structure 1000.

[0061] like Figure 3As shown, in other embodiments, the first end 110 of the first body portion 100 can be connected to the first positioning plate 320, and the second end 120 can be connected to the second positioning plate 340. The third end 210 of the second body portion 200 can be connected to the first cooling pipe 310, and the fourth end 220 can be connected to the second cooling pipe 330. The first cooling pipe 310 can be positioned and installed in the first positioning groove 321 of the first positioning plate 320, and the first cooling pipe 310 and the first positioning plate 320 can be welded or crimped. The second cooling pipe 330 can be positioned and installed in the positioning groove of the second positioning plate 340, and the second cooling pipe 330 and the second positioning plate 340 can be welded or crimped.

[0062] In some embodiments, the first cold pipe 310 can serve as a liquid inlet channel, and the second cold pipe 330 can serve as a liquid return channel. During use, inexpensive cryogenic fluid can be introduced through the first cold pipe 310 and discharged through the second cold pipe 330. While in the first and second cold pipes 310, 330, the inexpensive cryogenic fluid can transfer cooling energy to the cold shield structure 1000, thereby keeping the temperature of the cold shield structure 1000 lower than the ambient temperature.

[0063] like Figure 4 As shown, the embodiment also provides a cryogenic fluid transmission pipeline, which may include the cold shield structure 1000 provided in the embodiment. Furthermore, the cryogenic fluid transmission pipeline further includes a first transmission pipe 2100 and a second transmission pipe 2200. The first transmission pipe 2100 may be located within the cold shield structure 1000 and spaced apart from the cold shield structure 1000. The second transmission pipe 2200 may be located outside the cold shield structure 1000 and spaced apart from the cold shield structure 1000.

[0064] During use, the first transfer pipe 2100 can be used to transport expensive cryogenic fluids, such as liquid helium. A less expensive cryogenic fluid, such as liquid nitrogen, can flow through the first and second cold pipes 310 and 330. The liquid nitrogen transfers cold energy to the cold shield structure 1000, lowering the temperature of the cold shield structure 1000 to below the ambient temperature. This prevents heat radiation from the external environment to the liquid helium in the first transfer pipe 2100, reducing the loss of cold energy from the liquid helium.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0066] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cold shield structure, characterized in that: comprising a first body portion and a second body portion opposite each other, the first body portion comprising a first end and a second end, the second body portion comprising a third end and a fourth end; The first end is opposite to the third end, one of the first end and the third end is connected to a first cooling pipe, and the other is connected to a first positioning plate, the first positioning plate is provided with a first positioning groove, and the first cooling pipe is positioned in the first positioning groove; The second end is opposite to the fourth end, one of the second end and the fourth end is connected to a second cooling pipe, and the other is connected to a second positioning plate, the second positioning plate is provided with a second positioning groove, and the second cooling pipe is positioned in the second positioning groove; The first cooling tube is a circular tube, and the first positioning plate is configured as an arc-shaped plate to form the first arc-shaped positioning groove; The second cooling tube is a circular tube, and the second positioning plate is configured as an arc-shaped plate to form the second arc-shaped positioning groove.

2. The cold shield structure according to claim 1, characterized in that: The first end is connected to the first positioning plate, and the third end is connected to the first cooling pipe; The second end is connected to the second cooling pipe, and the fourth end is connected to the second positioning plate.

3. The cold shield structure according to claim 1 or 2, characterized in that: The first positioning groove is in an arc shape, and the inner diameter of the first positioning groove is equal to the outer diameter of the first cooling pipe.

4. The cold shield structure according to claim 3, characterized in that: A first opening structure is further configured on a side of the first positioning groove away from the first main body portion. The distance between two side edges of the first opening structure parallel to the axial direction of the cold shield structure is equal to the outer diameter of the first cold pipe.

5. The cold shield structure according to claim 1 or 2, characterized in that: The second positioning groove is in an arc shape, and the inner diameter of the second positioning groove is equal to the outer diameter of the second cooling pipe.

6. The cold shield structure according to claim 5, characterized in that: A second opening structure is further configured on a side of the second positioning groove away from the second main body portion, and a distance between two side edges of the second opening structure parallel to the axial direction of the cold shield structure is equal to the outer diameter of the second cold pipe.

7. A cryogenic fluid transmission pipeline, characterized in that: The cold shield structure comprises the cold shield structure according to any one of claims 1 to 6.

8. The cryogenic fluid transmission pipeline according to claim 7, characterized in that: The cryogenic fluid transmission pipeline further includes a first transmission pipe and a second transmission pipe; The first transmission pipe is located in the cold shield structure and is spaced apart from the cold shield structure; The second transmission tube is sleeved outside the cold shield structure and is spaced apart from the cold shield structure.

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