Cold screen of low-temperature container

Abstract

The utility model relates to a cold shield of a low-temperature container. Comprising a barrel and a plurality of supporting assemblies. The barrel is arranged between the inner shell and the outer shell in a sleeving manner; the inner shell is used for containing a low-temperature medium, and vacuum is formed between the inner shell and the outer shell; each supporting assembly is arranged on the outer wall of the cylinder body; each supporting assembly comprises a bolt, two gaskets, a locking nut and a cylinder, a groove is formed in one end of each cylinder, and an internal thread is arranged in each groove; the wall face of the barrel is provided with through holes which correspond to the supporting assemblies one to one and allow the corresponding bolts to penetrate through, the two gaskets are arranged on the two sides of the wall face of the barrel respectively and fixed through the bolts and the locking nuts, and the cylinders are installed at the outer ends of the bolts in a screwed mode through the internal threads. The outer end of the bolt faces the side where the shell is located. The fixing structure is firm in fixing and low in heat leakage rate.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage, in particular to a cold shield of a cryogenic container. Background Art

[0002] In cryogenic equipment, a vacuum interlayer structure is often adopted, and its heat leakage modes are mainly thermal radiation and heat conduction. In order to reduce the external thermal radiation received by the inner container, a cold shield is usually arranged between the inner container and the outer shell, and the cold shield with a lower temperature is used to shield the external thermal radiation for the inner container to reduce the heat leakage of the inner container.

[0003] The cold shield itself needs to be cooled through a pipeline filled with a cold medium. In the prior art, the cold shield is usually fixed on the inner container or hoisted on the outer shell. In order to ensure that the cold shield can adapt to road transportation, a fixing structure is also required to resist acceleration and deceleration during transportation. However, some existing cold shield design schemes have a relatively complex structure, cumbersome installation steps, and often have problems of insecure fixation and large heat leakage.

[0004] Therefore, there is an urgent need to provide a cold shield for a cryogenic container to solve the above technical problems. Content of the Utility Model

[0005] The embodiment of the utility model provides a cold shield for a cryogenic container, which is firmly fixed and has a low heat leakage rate.

[0006] An embodiment of the utility model provides a cold shield for a cryogenic container, including:

[0007] a cylinder body and a plurality of support components;

[0008] The cylinder body is sleeved between the inner shell and the outer shell; the inner shell is used for containing cryogenic medium, and a vacuum is formed between the inner shell and the outer shell;

[0009] Each support component is respectively arranged on the outer wall of the cylinder body; each support component includes a bolt, two gaskets, a lock nut and a cylinder. One end of the cylinder is provided with a groove, and an internal thread is arranged in the groove; through holes corresponding to each support component one by one for the corresponding bolts to pass through are arranged on the wall surface of the cylinder body. The two gaskets are respectively arranged on both sides of the wall surface of the cylinder body and are fixed by the bolt and the lock nut. The cylinder is screwed on the outer end of the bolt through the internal thread, and the outer end of the bolt faces the side where the outer shell is located.

[0010] In a possible design, the other end of the cylinder is a spherical surface.

[0011] In a possible design, each support component is arranged at the lower end of the cylinder body and is evenly distributed along the circumferential direction of the cylinder body.

[0012] In a possible design, it further includes an upper screen and a lower screen; the upper screen and the lower screen are respectively detachably connected to the top end and the bottom end of the cylinder body.

[0013] In a possible design, it further includes a plurality of hoisting components. One end of each hoisting component is respectively connected to the wall surface of the cylinder body, and the other end is respectively connected to the top end of the outer shell. Each hoisting component is evenly distributed along the circumferential direction of the cylinder body.

[0014] In a possible design, it further includes a plurality of wedge plates, and each wedge plate corresponds to one of the hoisting components one by one;

[0015] The side surface of each wedge plate is respectively bolt - connected to one end of the corresponding hoisting component close to the cylinder body, and the inclined surface is respectively bolt - connected to the top surface of the upper screen.

[0016] In a possible design, it further includes a plurality of folding plates evenly arranged along the circumferential direction of the cylinder body; each folding plate includes a first plate surface and a second plate surface. One end of the first plate surface is connected to one end of the second plate surface, and the included angle between the first plate surface and the second plate surface is equal to the included angle between the cylinder body and the lower screen;

[0017] The first plate surface is bolt - connected to the inner wall of the cylinder body, and the second plate surface is bolt - connected to the top surface of the lower screen.

[0018] In a possible design, it further includes a plurality of upper heat - conducting plates evenly arranged along the circumferential direction of the cylinder body; each upper heat - conducting plate is in an L shape. One end of each upper heat - conducting plate is respectively connected to the outer wall of the cylinder body, and the other end is respectively connected to the top end of the upper screen.

[0019] In a possible design, it further includes a plurality of lower heat - conducting plates evenly arranged along the circumferential direction of the cylinder body; each lower heat - conducting plate is in an L shape. One end of each lower heat - conducting plate is respectively connected to the outer wall of the cylinder body, and the other end is respectively connected to the bottom end of the lower screen.

[0020] In a possible design, a cooling pipeline is installed on the outer wall of the cylinder body. The cooling pipeline is attached to the outer wall of the cylinder body and is used for the circulation of a low - temperature medium.

[0021] The embodiment of the present utility model provides a cold screen of a cryogenic container. By providing a support assembly on the outer wall of the cylinder body, support can be provided for the cylinder body when it shakes. In addition, the cylinder does not directly contact the inner wall of the outer shell. Even if there is contact, it is point contact, and the heat leakage generated is very small. It can be seen that by providing the support assembly, the shaking amount of the cold - screen cylinder body can be limited, and at the same time, not much heat leakage will be generated. It is firm and has a low heat - leakage rate. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of a cold screen provided by an embodiment of the present invention;

[0024] Figure 2 Structural schematic diagram of a cryogenic container provided by an embodiment of the present invention;

[0025] Figure 3 For Figure 2 Partial enlarged view of part A in

[0026] Figure 4 For Figure 2 Partial enlarged view of part B in

[0027] Figure 5 For Figure 2 Partial enlarged view of part C in

[0028] Figure 6 For Figure 8 Partial enlarged view of part D in

[0029] Figure 7 Structural schematic diagram of a cooling pipeline provided by an embodiment of the present invention;

[0030] Figure 8 Assembly schematic diagram of a cooling pipeline and a cold screen provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 10 - Cylinder;

[0033] 20 - Inner shell;

[0034] 30 - Outer shell;

[0035] 40 - Support assembly; 401 - Bolt; 402 - Gasket; 403 - Locking nut; 404 - Cylinder;

[0036] 50 - Upper screen;

[0037] 60 - Lower screen;

[0038] 70 - Lifting assembly;

[0039] 80 - Wedge plate;

[0040] 90 - folding plate; 901 - first plate surface; 902 - second plate surface;

[0041] 100 - upper heat conducting plate;

[0042] 110 - lower heat conducting plate;

[0043] 120 - cooling pipeline; 121 - inlet pipe; 122 - upper elbow; 123 - shunt pipe; 124 - lower elbow; 125 - outlet pipe. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0045] As Figures 1 to 3 shown, the embodiments of the present utility model provide a cold shield for a cryogenic container, including:

[0046] a cylinder 10 and a plurality of support assemblies 40;

[0047] The cylinder 10 is sleeved between an inner shell 20 and an outer shell 30; the inner shell 20 is used for containing cryogenic medium, and the space between the inner shell 20 and the outer shell 30 is vacuum;

[0048] Each support assembly 40 is respectively arranged on the outer wall of the cylinder 10; each support assembly 40 includes a bolt 401, two gaskets 402, a lock nut 403 and a cylinder 404. One end of the cylinder 404 is provided with a groove, and an internal thread is arranged in the groove; through holes corresponding to each support assembly 40 for the corresponding bolt 401 to pass through are arranged on the wall surface of the cylinder 10. The two gaskets 402 are respectively arranged on both sides of the wall surface of the cylinder 10 and fixed by the bolt 401 and the lock nut 403. The cylinder 404 is screwed on the outer end of the bolt 401 through the internal thread, and the outer end of the bolt 401 faces the side where the outer shell 30 is located.

[0049] In this embodiment, by arranging the support assemblies 40 on the outer wall of the cylinder 10, support can be provided for the cylinder 10 when it shakes. In addition, the cylinder 404 does not directly contact the inner wall of the outer shell 30. Even if there is contact, it is point contact, and the heat leakage generated is very small. It can be seen that by arranging the support assemblies 40 in this application, the shaking amount of the cold shield cylinder 10 can be limited, and a lot of heat leakage will not be generated, which is firm and has a low heat leakage rate.

[0050] In addition, the cylinder 404 is screwed onto the outer end of the bolt 401 through internal threads. By adjusting the tightening length of the cylinder 404 and the bolt 401, the gap between the cylinder 404 and the inner wall of the outer shell 30 can be adjusted. In this way, the gap between the cylinder 404 and the inner wall of the outer shell 30 is adjustable, allowing for a certain machining error in the roundness of the cylinder body 10.

[0051] In some embodiments, the other end of the cylinder 404 is a spherical surface. In this way, when the cylinder body 10 shakes and the cylinder 404 impacts the inner wall of the outer shell 30, the damage to the shell can be reduced.

[0052] In some embodiments, each support assembly 40 is disposed at the lower end of the cylinder body 10 and is evenly distributed along the circumferential direction of the cylinder body 10.

[0053] During transportation or collision, the shaking of the cold shield cylinder body 10 mainly occurs at the lower part and may shake in any direction. Therefore, by being disposed at the lower end of the cylinder body 10 and evenly distributed, when the cold shield shakes, the support assembly 40 will contact the outer shell 30, effectively supporting in all directions, thereby restricting the shaking of the cold shield.

[0054] In some embodiments, it further includes an upper screen 50 and a lower screen 60; the upper screen 50 and the lower screen 60 are respectively detachably connected to the top end and the bottom end of the cylinder body 10. By providing the upper screen 50 and the lower screen 60, the installation and maintenance of the inner shell 20 are facilitated. In addition, the shapes of the upper screen 50 and the lower screen 60 are both ellipsoidal.

[0055] In some embodiments, it further includes a plurality of hoisting assemblies 70. One end of each hoisting assembly 70 is respectively connected to the wall surface of the cylinder body 10, and the other end is respectively connected to the top end of the outer shell 30. Each hoisting assembly 70 is evenly distributed along the circumferential direction of the cylinder body 10.

[0056] In this embodiment, the hoisting assembly 70 is fixed by bolts 401 and nuts. There are several hoisting assemblies 70, which are used to fix the cold shield cylinder body 10 and bear the weight of the entire cold shield device.

[0057] As Figure 4 shown, in some embodiments, it further includes a plurality of wedge-shaped plates 80. Each wedge-shaped plate 80 corresponds to a hoisting assembly 70 one by one;

[0058] One side of each wedge-shaped plate 80 is respectively connected to the end of the corresponding hoisting assembly 70 close to the cylinder body 10 by bolts 401, and the inclined surface is respectively connected to the top surface of the upper screen 50 by bolts 401. In this way, the installation is firm and it is also convenient for disassembly.

[0059] As Figure 5As shown, in some embodiments, it further includes a plurality of folding plates 90 evenly arranged along the circumferential direction of the cylinder body 10; each folding plate 90 includes a first plate surface 901 and a second plate surface 902. One end of the first plate surface 901 is connected to one end of the second plate surface 902, and the included angle between the first plate surface 901 and the second plate surface 902 is equal to the included angle between the cylinder body 10 and the lower screen 60;

[0060] The first plate surface 901 is connected to the inner wall of the cylinder body 10 by bolts 401, and the second plate surface 902 is connected to the top surface of the lower screen 60 by bolts 401. In this way, the installation is firm and convenient for disassembly.

[0061] As Figure 6 shown, in some embodiments, it further includes a plurality of upper heat conducting plates 100 evenly arranged along the circumferential direction of the cylinder body 10; each upper heat conducting plate 100 is L-shaped, one end of the upper heat conducting plate 100 is respectively connected to the outer wall of the cylinder body 10, and the other end is respectively connected to the top end of the upper screen 50.

[0062] In some embodiments, it further includes a plurality of lower heat conducting plates 110 evenly arranged along the circumferential direction of the cylinder body 10; each lower heat conducting plate 110 is L-shaped, one end of the lower heat conducting plate 110 is respectively connected to the outer wall of the cylinder body 10, and the other end is respectively connected to the bottom end of the lower screen 60.

[0063] In the above two embodiments, the structural forms of the upper heat conducting plate 100 and the lower heat conducting plate 110 are similar, except that one is arranged at the upper end and the other is arranged at the lower end. In addition, the connection method can be welding, screwing or riveting fixation, etc.

[0064] As Figure 7 and Figure 8 shown, in some embodiments, a cooling pipeline 120 is installed on the outer wall of the cylinder body 10. The cooling pipeline 120 is in contact with the outer wall of the cylinder body 10, and the cooling pipeline 120 is used for the circulation of low-temperature medium.

[0065] In this embodiment, with the flow of low-temperature medium in the cooling pipeline 120, the cylinder body 10 of the cold screen can be kept at a low temperature. The function of the heat conducting plate is to transfer the cold quantity of the cylinder body 10 of the cold screen to the upper screen 50 and the lower screen 60, so that the upper screen 50 and the lower screen 60 can also be kept at a certain low temperature.

[0066] In some embodiments, the cooling pipeline 120 includes: an inlet pipe 121, an upper elbow 122, a plurality of shunt pipes 123, a lower elbow 124 and an outlet pipe 125;

[0067] The inlet of the inlet pipe 121 is connected to the supply device of the cryogenic medium, and the outlet is communicated with the middle part of the upper elbow 122. One end of each shunt pipe 123 is respectively communicated with the upper elbow 122, and the other end is respectively communicated with the lower elbow 124. One end of the outlet pipe 125 is communicated with the middle part of the lower elbow 124, and the other end is connected to the cryogenic medium recovery device;

[0068] The upper elbow 122 and the lower elbow 124 are respectively sleeved on the outer wall of the upper part and the outer wall of the lower part of the cold screen, and each shunt pipe 123 is uniformly distributed along the circumferential direction of the cold screen.

[0069] In this embodiment, by providing the upper elbow 122 and the lower elbow 124, and arranging a plurality of shunt pipes 123 in parallel between the upper and lower elbows, after the cryogenic medium enters the upper elbow 122 from the inlet pipe 121, it will flow out from each shunt pipe 123 respectively, realizing the shunting of the cryogenic medium. In this way, not only the total flow area is increased, but also the flow path is shortened, so the flow resistance of the entire cooling device is very small and the pressure drop loss becomes smaller. In addition, since the shunt pipes 123 are evenly distributed, no matter from which shunt pipe 123 the cryogenic medium flows out, the length of its flow path is the same. Therefore, the liquid hydrogen will flow evenly from the multiple shunt pipes 123, so that the temperature distribution of the cold screen is more uniform and there will be no situation of one part being cold and one part being hot.

[0070] In some embodiments, both the upper elbow 122 and the lower elbow 124 are arc-shaped elbows with openings, and both ends of each elbow are in a sealed state;

[0071] By adjusting the curvature of the upper elbow 122 and the lower elbow 124, the outer walls of the upper elbow 122 and the lower elbow 124 are made to be in contact with the outer wall of the cold screen.

[0072] In the above two embodiments, since both the upper elbow 122 and the lower elbow 124 are open circles, they can be bent to a certain extent during installation. According to the actual size of the cold screen cylinder 10, the shape of the upper elbow 122 or the lower elbow 124 is appropriately adjusted so that it can fit more closely to the cylinder 10 of the cold screen. Also, since the shunt pipes 123 are respectively connected to the upper and lower elbows, the outer walls of the shunt pipes 123 are also more in contact with the outer wall of the cold screen. Therefore, better heat transfer effects can be obtained between each pipeline and the cold screen.

[0073] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0074] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and is only used to illustrate the technical solution of the present utility model, and is not used to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are all included in the protection scope of the present utility model.

Claims

1. A cold shield of a cryogenic container, characterized in that, Comprising: A cylinder body (10) and a plurality of support components (40); The cylinder body (10) is sleeved between an inner shell (20) and an outer shell (30); the inner shell (20) is used for containing a cryogenic medium, and a vacuum is provided between the inner shell (20) and the outer shell (30); Each of the support components (40) is respectively arranged on the outer wall of the cylinder body (10); each of the support components (40) includes a bolt (401), two gaskets (402), a lock nut (403) and a cylinder (404). A groove is provided at one end of the cylinder (404), and an internal thread is provided in the groove; through holes corresponding to each of the support components (40) one by one for the corresponding bolts (401) to pass through are provided on the wall surface of the cylinder body (10). The two gaskets (402) are respectively arranged on both sides of the wall surface of the cylinder body (10) and are fixed by the bolt (401) and the lock nut (403). The cylinder (404) is screwed on the outer end of the bolt (401) through the internal thread, and the outer end of the bolt (401) faces the side where the outer shell (30) is located.

2. The cold screen according to claim 1, wherein The other end of the cylinder (404) is a spherical surface.

3. The cold screen according to claim 1, characterized in that, Each of the support components (40) is arranged at the lower end of the cylinder body (10) and is evenly distributed along the circumferential direction of the cylinder body (10).

4. The cold screen according to claim 1, characterized in that It further includes an upper screen (50) and a lower screen (60); the upper screen (50) and the lower screen (60) are respectively detachably connected to the top end and the bottom end of the cylinder body (10).

5. The cold screen according to claim 4, characterized in that, It further includes a plurality of hoisting components (70). One end of each of the hoisting components (70) is respectively connected to the wall surface of the cylinder body (10), and the other end is respectively connected to the top end of the outer shell (30). Each of the hoisting components (70) is evenly distributed along the circumferential direction of the cylinder body (10).

6. The cold screen according to claim 5, characterized in that, It further includes a plurality of wedge plates (80), and each of the wedge plates (80) corresponds to one of the hoisting components (70) one by one; The side surface of each of the wedge plates (80) is respectively connected to the bolt (401) at one end of the corresponding hoisting component (70) close to the cylinder body (10), and the inclined surface is respectively connected to the top surface of the upper screen (50) by a bolt (401).

7. The cold screen according to claim 4, wherein It further includes a plurality of folded plates (90) evenly arranged along the circumferential direction of the cylinder body (10); each folded plate (90) includes a first plate surface (901) and a second plate surface (902). One end of the first plate surface (901) is connected to one end of the second plate surface (902), and the included angle between the first plate surface (901) and the second plate surface (902) is equal to the included angle between the cylinder body (10) and the lower screen (60); The first plate surface (901) is connected to the inner wall of the cylinder body (10) by a bolt (401), and the second plate surface (902) is connected to the top surface of the lower screen (60) by a bolt (401).

8. The cold shield according to claim 4, characterized in that, It further includes a plurality of upper heat conducting plates (100) evenly arranged along the circumferential direction of the cylinder body (10); each of the upper heat conducting plates (100) is L-shaped, one end of each upper heat conducting plate (100) is respectively connected to the outer wall of the cylinder body (10), and the other end is respectively connected to the top end of the upper screen (50).

9. The cold screen according to claim 4, wherein It further includes a plurality of lower heat conducting plates (110) evenly arranged along the circumferential direction of the cylinder body (10); each of the lower heat conducting plates (110) is L-shaped, one end of each lower heat conducting plate (110) is respectively connected to the outer wall of the cylinder body (10), and the other end is respectively connected to the bottom end of the lower screen (60).

10. The cold screen according to claim 1, characterized in that, A cooling pipeline (120) is installed on the outer wall of the cylinder body (10), the cooling pipeline (120) is attached to the outer wall of the cylinder body (10), and the cooling pipeline (120) is used for the circulation of a low-temperature medium.

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