Neck structure for a cryogenic vessel

Abstract

The utility model relates to a neck pipe structure for low temperature container. The low temperature container includes content vessel and outer container, the neck pipe structure includes: neck pipe, one end with content vessel intercommunication, the other end passes out outer container and communicates with outside environment, spoiler, including glass steel pipe and spoiler, the heat conductivity coefficient of spoiler is less than set threshold value, the glass steel pipe coaxially covers and sets in neck pipe, and the glass steel pipe is away from the one end of content vessel and is connected with the plugging member, along the axial direction of glass steel pipe, the spoiler sets up in the cavity formed by the outer wall of glass steel pipe and the inner wall of neck pipe, when the gas of content vessel evaporation flows from the cavity to outside environment, through the spoiler disturbance airflow, to make the turbulent flow of gas in the cavity. The present application can make full use of the waste heat of evaporation gas, reduces the heat loss of low temperature container.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic technology, and in particular to a neck structure for cryogenic containers. Background Technology

[0002] Cryogenic vessels generally consist of an outer container, an inner container, and supporting structures. The neck tube, as a key supporting structure connecting the inner container and the outer container, is an important component of the cryogenic vessel. Currently, the design of the neck tube structure for cryogenic vessels mainly focuses on two aspects: first, optimizing the neck tube wall thickness and welding method to enhance structural strength; second, increasing the neck tube length to extend the heat conduction path, thereby blocking external heat from entering the inner liner along the neck tube and reducing the evaporation rate of the medium.

[0003] However, none of the above methods take into account the utilization of residual heat from the evaporated gas in the cryogenic container. The evaporated gas flows out directly through the center of the neck tube without sufficient heat exchange with the inner wall of the neck tube, resulting in a waste of cold energy.

[0004] Therefore, there is an urgent need to provide a neck structure for cryogenic containers to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a neck structure for a cryogenic container, which can make full use of the waste heat of the evaporated gas and reduce the heat loss of the cryogenic container.

[0006] In a first aspect, one embodiment of the present invention provides a neck structure for a cryogenic container, the cryogenic container comprising an inner container and an outer container, the neck structure comprising: The neck tube has one end connected to the inner container and the other end extending out of the outer container to communicate with the outside. The flow-dissipating component includes a fiberglass tube and a flow-dissipating material, wherein the thermal conductivity of the flow-dissipating material is less than a set threshold; the fiberglass tube is coaxially sleeved inside the neck tube, and a sealing component is connected to the end of the fiberglass tube away from the inner container; along the axial direction of the fiberglass tube, the flow-dissipating material is disposed in the cavity formed by the outer wall of the fiberglass tube and the inner wall of the neck tube; When the gas evaporated from the inner container flows from the cavity to the outside, the airflow is disturbed by the turbulent material to make the gas flow turbulently within the cavity.

[0007] In one possible design, the turbulence-inducing material is a fiber rope; the fiber rope is spirally wound around the outer wall of the fiberglass tube to form a spiral flow channel in the cavity between the fiberglass tube and the neck tube; the gas evaporated from the inner container flows along the spiral flow channel and flows to the outside from the top of the spiral flow channel.

[0008] In one possible design, the turbulence-inducing element is a plurality of annular baffles, each of which is spaced apart within the cavity along the axial direction of the fiberglass tube, and each of the annular baffles is provided with a plurality of circumferentially distributed openings; the openings are used to allow gas flow and turbulent the airflow.

[0009] In one possible design, the sealing component includes a manifold plug, a safety valve, and a plurality of hex bolts; One end of the manifold plug is inserted into the fiberglass pipe, and the fiberglass pipe has multiple bolt holes around its circumference; each of the internal hex bolts fixes the manifold plug to the fiberglass pipe through the corresponding bolt hole; the inlet of the safety valve is connected to the side wall of the manifold plug; When the gas pressure inside the fiberglass pipe exceeds the opening pressure of the safety valve, the overpressure gas is discharged from the safety valve.

[0010] One possible design also includes a gas collection pipe; The gas collecting pipe is sleeved on the outside of the neck pipe and the fiberglass pipe; one end of the gas collecting pipe is sealed to the end of the neck pipe near the outer container, and the other end is sealed to the end of the fiberglass pipe near the outer container. The gas collecting pipe is connected to the gas outlet pipe. Gas flowing out of the cavity enters the gas collecting pipe and then flows out to the outside through the gas outlet pipe.

[0011] One possible design also includes multiple copper screens; Each copper screen is connected to the outer wall of the neck tube between the inner container and the outer container, and is distributed at intervals along the axial direction of the neck tube.

[0012] In one possible design, each of the copper screens is overlapped with aluminum foil.

[0013] In one possible design, it also includes an inner container reinforcement and an inner container reinforcement plate; The inner container reinforcement is cylindrical and is fitted onto the outside of the neck tube; the bottom end of the inner container reinforcement is welded to the opening of the inner container, and the inner wall of the inner container reinforcement is welded to the outer wall of the neck tube. One end of the inner container reinforcing plate is welded to the wall of the inner container, and the other end is welded to the outer wall of the inner container reinforcing member.

[0014] In one possible design, it also includes an outer container reinforcement and an outer container reinforcement plate; The outer container reinforcement is cylindrical and is fitted onto the outside of the neck tube; the bottom end of the outer container reinforcement is welded to the opening of the outer container, and the inner wall of the outer container reinforcement is welded to the outer wall of the neck tube. One end of the outer container reinforcing plate is welded to the wall of the outer container, and the other end is welded to the outer wall of the outer container reinforcing member.

[0015] Secondly, one embodiment of the present invention provides a cryogenic container, including an inner container, an outer container, and a neck structure in any of the above possible designs.

[0016] This invention provides a neck structure for a cryogenic container. By placing a fiberglass tube inside the neck, the gas evaporated from the inner container can flow within the cavity formed between the fiberglass tube and the neck. During gas flow, the presence of a turbulent element within the cavity disrupts the flow, changing the flow state from laminar to turbulent. This enhances the forced convection heat transfer between the gas and the inner wall of the neck, improving the efficiency of cold gas recovery. Furthermore, the cold gas heat exchange lowers the temperature of the neck, offsetting the heat transferred from the outside to the inner container through the neck, thus reducing heat loss from the cryogenic container. Additionally, the presence of a sealing element allows the cold gas to primarily flow out of the cavity, further enhancing heat exchange. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the neck tube structure for a cryogenic container provided in an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B in the middle; Figure 4 A schematic diagram showing a fiber rope wound around a fiberglass pipe according to an embodiment of the present invention; Figure 5 A schematic diagram showing an annular partition plate disposed on a fiberglass pipe according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of an annular partition provided in an embodiment of the present invention.

[0019] Figure label: 1-Inner container; 2-Outer container; 3-Neck tube; 4-Fiberglass pipe; 5-Turbidity; 6-Manifold plug; 7-Safety valve; 8-Hex socket head cap bolt; 9-Gas collection pipe; 10-Copper screen; 11-Inner container reinforcement; 12-Inner container reinforcement plate; 13-Outer container reinforcement; 14-Outer container reinforcement plate. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] like Figures 1-3 As shown, this embodiment of the present invention provides a neck structure for a cryogenic container, the cryogenic container including an inner container 1 and an outer container 2, the neck structure including: The neck tube 3 has one end connected to the inner container 1 and the other end passing through the outer container 2 and connecting to the outside. The flow-deflecting component includes a fiberglass pipe 4 and a flow-deflecting material 5, wherein the thermal conductivity of the flow-deflecting material 5 is less than a set threshold. The fiberglass tube 4 is coaxially sleeved inside the neck tube 3, and a sealing element is connected to the end of the fiberglass tube 4 away from the inner container 1; along the axial direction of the fiberglass tube 4, the turbulence-disrupting element 5 is set in the cavity formed by the outer wall of the fiberglass tube 4 and the inner wall of the neck tube 3; when the gas evaporated from the inner container 1 flows from the cavity to the outside, the airflow is disturbed by the turbulence-disrupting element 5 so that the gas flows turbulently in the cavity.

[0022] In this embodiment, by installing a fiberglass tube 4 inside the neck tube 3, the gas evaporated from the inner container 1 can flow within the cavity formed between the fiberglass tube 4 and the neck tube 3. During the gas flow, by installing a turbulence-inducing element 5 within the cavity, the flowing gas is disturbed, causing the gas flow state to change from laminar to turbulent, enhancing the forced convection heat transfer effect between the gas and the inner wall of the neck tube, and improving the cold air recovery efficiency. Furthermore, since the cold air heat transfer can lower the temperature of the neck tube 3, it offsets the heat transferred from the outside to the inner container 1 through the neck tube 3, reducing the heat loss of the cryogenic container. Additionally, by installing a sealing element, the cold air can mainly flow out from the cavity, further enhancing heat transfer.

[0023] It should be noted that, in order to prevent the turbulence-causing material 5 from falling off the surface of the fiberglass pipe 4, low-temperature adhesive can be applied intermittently at the connection between the turbulence-causing material 5 and the fiberglass pipe 4.

[0024] In some implementations, such as Figure 4 As shown, the turbulence-inducing element 5 is a fiber rope; the fiber rope is spirally wound around the outer wall of the fiberglass tube 4 to form a spiral flow channel in the cavity between the fiberglass tube 4 and the neck tube 3; the gas evaporated in the inner container 1 flows along the spiral flow channel and flows to the outside from the top of the spiral flow channel. Furthermore, Kevlar fiber rope is preferably used. Kevlar fiber rope has low thermal conductivity, which can reduce heat leakage from the outside to the inner container 1 along the turbulence-inducing element 5. In addition, Kevlar fiber rope has characteristics such as high tensile strength, low elongation, wear resistance, insulation, flame retardancy, high temperature resistance, and low temperature resistance, which can increase the safety and service life of the turbulence-inducing element 5. Of course, users can also choose fiber ropes of other materials; this application does not impose specific limitations.

[0025] In some implementations, such as Figure 5 and Figure 6 As shown, the turbulence-disrupting element 5 consists of multiple annular baffles, each of which is spaced apart in the cavity along the axial direction of the fiberglass tube 4, and each annular baffle is provided with multiple circumferentially distributed openings; the openings are used to allow gas flow and to turbulent the airflow.

[0026] In this embodiment, when the gas evaporated from the inner container 1 flows in the cavity and encounters the annular baffle, the gas passes through the openings in the annular baffle. The presence of the openings disturbs the airflow, thereby enhancing the heat exchange effect of forced convection between the gas and the inner wall of the neck tube 3, further improving the cold air recovery efficiency and reducing the temperature of the neck tube 3. Furthermore, the size and number of the openings are not specifically limited here.

[0027] In some embodiments, the sealing component includes a manifold plug 6, a safety valve 7, and a plurality of hexagon socket head cap bolts 8; One end of the manifold plug 6 is inserted into the fiberglass pipe 4, and the fiberglass pipe 4 has multiple bolt holes around its circumference; each hexagon socket bolt 8 fixes the manifold plug 6 to the fiberglass pipe 4 through the corresponding bolt hole; the inlet of the safety valve 7 is connected to the side wall of the manifold plug 6. When the gas pressure inside the fiberglass pipe 4 exceeds the opening pressure of the safety valve 7, the overpressure gas is discharged from the safety valve 7.

[0028] In this embodiment, a safety valve 7 is installed. When the gas inside the fiberglass pipe 4 is overpressurized, the safety valve 7 activates to release the excess pressure, ensuring the safe operation of the cryogenic container. Furthermore, to prevent the hexagon socket head cap bolts 8 from loosening, cryogenic adhesive can be applied to the connection point.

[0029] In some implementations, such as Figure 3 As shown, it also includes a gas collecting pipe 9; The gas collecting pipe 9 is sleeved on the outside of the neck pipe 3 and the fiberglass pipe 4; one end of the gas collecting pipe 9 is sealed to the end of the neck pipe 3 near the outer container 2, and the other end is sealed to the end of the fiberglass pipe 4 near the outer container 2. The gas collecting pipe 9 is connected to the gas outlet pipe. Gas flowing out of the cavity enters the gas collecting pipe 9 and then flows out to the outside through the gas outlet pipe.

[0030] In this embodiment, by setting up the gas collection pipe 9, it is convenient to collect the evaporated cold air, and then uniformly discharge or recycle it.

[0031] In some implementations, such as Figure 1 As shown, it also includes multiple copper screens 10; Each copper screen 10 is connected to the outer wall of the neck tube 3 between the inner container 1 and the outer container 2, and is distributed at intervals along the axial direction of the neck tube 3. In addition, aluminum foil is overlapped on each copper screen 10.

[0032] In this embodiment, the copper screen 10 is connected to the neck tube 3. As the temperature of the neck tube 3 decreases, the cold energy is transferred to the copper screen 10 and the aluminum foil, and further transferred to the insulation material between the inner container 1 and the outer container 2, thereby further reducing the static evaporation rate of the low-temperature container.

[0033] In some implementations, such as Figure 2 As shown, it also includes an inner container reinforcement 11 and an inner container reinforcement plate 12; The inner container reinforcement 11 is cylindrical and is fitted onto the outside of the neck tube 3; the bottom end of the inner container reinforcement 11 is welded to the opening of the inner container 1, and the inner wall of the inner container reinforcement 11 is welded to the outer wall of the neck tube 3. One end of the inner container reinforcing plate 12 is welded to the wall of the inner container 1, and the other end is welded to the outer wall of the inner container reinforcing member 11.

[0034] In this embodiment, by setting the inner container reinforcement 11 and the inner container reinforcement plate 12, the neck tube 3 and the opening of the inner container 1 can be strengthened to ensure the stability of the cryogenic container.

[0035] In some implementations, such as Figure 3 As shown, it also includes an outer container reinforcement 13 and an outer container reinforcement plate 14; The outer container reinforcement 13 is cylindrical and is fitted onto the outside of the neck tube 3; the bottom end of the outer container reinforcement 13 is welded to the opening of the outer container 2, and the inner wall of the outer container reinforcement 13 is welded to the outer wall of the neck tube 3. One end of the outer container reinforcing plate 14 is welded to the wall of the outer container 2, and the other end is welded to the outer wall of the outer container reinforcing member 13.

[0036] In this embodiment, by providing the outer container reinforcement 13 and the outer container reinforcement plate 14, the neck tube 3 and the opening of the outer container 2 can be strengthened to ensure the stability of the cryogenic container.

[0037] This utility model embodiment also provides a cryogenic container, including an inner container 1, an outer container 2, and a neck tube structure provided in any of the above embodiments. Both belong to the same inventive concept and will not be described in detail here.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is used only to illustrate the technical solution of this utility model, and is not intended to limit the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A neck structure for a cryogenic container, characterized in that, The cryogenic container includes an inner container (1) and an outer container (2), and the neck tube structure includes: The neck tube (3) is connected at one end to the inner container (1) and at the other end to the outer container (2) and to the outside. The flow-dissipating component includes a fiberglass tube (4) and a flow-dissipating material (5), wherein the thermal conductivity of the flow-dissipating material (5) is less than a set threshold; the fiberglass tube (4) is coaxially sleeved inside the neck tube (3), and a sealing component is connected to one end of the fiberglass tube (4) away from the inner container (1); along the axial direction of the fiberglass tube (4), the flow-dissipating material (5) is disposed in the cavity formed by the outer wall of the fiberglass tube (4) and the inner wall of the neck tube (3); When the gas evaporated from the inner container (1) flows from the cavity to the outside, the airflow is disturbed by the turbulent material (5) so that the gas flows turbulently in the cavity.

2. The neck tube structure according to claim 1, characterized in that, The turbulence-causing agent (5) is a fiber rope; the fiber rope is spirally wound around the outer wall of the fiberglass tube (4) to form a spiral flow channel in the cavity between the fiberglass tube (4) and the neck tube (3); the gas evaporated from the inner container (1) flows along the spiral flow channel and flows to the outside from the top of the spiral flow channel.

3. The neck structure according to claim 1, characterized in that, The disturbance (5) consists of multiple annular baffles. Along the axial direction of the fiberglass pipe (4), each annular baffle is spaced apart in the cavity, and each annular baffle is provided with multiple openings distributed circumferentially. The openings are used to allow gas flow and disturb the airflow.

4. The neck structure according to claim 1, characterized in that, The sealing components include a manifold plug (6), a safety valve (7), and multiple hex bolts (8); One end of the manifold plug (6) is inserted into the fiberglass pipe (4), and the fiberglass pipe (4) has multiple bolt holes in its circumference; each of the internal hex bolts (8) fixes the manifold plug (6) to the fiberglass pipe (4) through the corresponding bolt holes; the inlet of the safety valve (7) is connected to the side wall of the manifold plug (6); When the gas pressure inside the fiberglass pipe (4) is greater than the opening pressure of the safety valve (7), the overpressure gas is discharged from the safety valve (7).

5. The neck tube structure according to claim 4, characterized in that, It also includes the gas collecting tube (9); The gas collecting pipe (9) is sleeved on the outside of the neck pipe (3) and the fiberglass pipe (4); one end of the gas collecting pipe (9) is sealed to the end of the neck pipe (3) near the outer container (2), and the other end is sealed to the end of the fiberglass pipe (4) near the outer container (2). The gas collecting pipe (9) is connected to the gas outlet pipe. Gas flowing out of the cavity enters the gas collecting pipe (9) and then flows out to the outside through the gas outlet pipe.

6. The neck structure according to claim 1, characterized in that, It also includes multiple copper screens (10); Each copper screen (10) is connected to the outer wall of the neck tube (3) between the inner container (1) and the outer container (2), and is distributed at intervals along the axial direction of the neck tube (3).

7. The neck tube structure according to claim 6, characterized in that, Each of the copper screens is covered with aluminum foil.

8. The neck tube structure according to claim 1, characterized in that, It also includes a container reinforcement (11) and a container reinforcement plate (12); The inner container reinforcement (11) is cylindrical and is fitted onto the outside of the neck tube (3); the bottom end of the inner container reinforcement (11) is welded to the opening of the inner container (1), and the inner wall of the inner container reinforcement (11) is welded to the outer wall of the neck tube (3). One end of the inner container reinforcing plate (12) is welded to the wall of the inner container (1), and the other end is welded to the outer wall of the inner container reinforcing member (11).

9. The neck tube structure according to claim 1, characterized in that, It also includes an outer container reinforcement (13) and an outer container reinforcement plate (14); The outer container reinforcement (13) is cylindrical and is fitted onto the outside of the neck tube (3); the bottom end of the outer container reinforcement (13) is welded to the opening of the outer container (2), and the inner wall of the outer container reinforcement (13) is welded to the outer wall of the neck tube (3). One end of the outer container reinforcing plate (14) is welded to the wall of the outer container (2), and the other end is welded to the outer wall of the outer container reinforcing member (13).

10. A cryogenic container, characterized in that, It includes an inner container (1), an outer container (2), and a neck tube structure as described in any one of claims 1-9.

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