Thermal insulation protection device for liquid nitrogen tank

Abstract

The utility model discloses a liquid nitrogen container heat preservation protection device which comprises a liquid nitrogen container assembly, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container and a liquid nitrogen container assembly, and the liquid nitrogen container assembly comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell and used for storing liquid nitrogen; and a protection assembly. Foam is input into a containing cavity, in the process, the foam gradually spreads upwards from the bottom of the containing cavity till the containing cavity is filled with the foam, redundant foam is discharged from an outlet, injection of the foam at an inlet is stopped, the outlet is sealed through a second sealing cover, a foam injection pipe is detached, and the inlet is sealed through a first sealing cover. The outlet is sealed firstly, so that when the foam injection pipe is detached from the inlet, the foam in the accommodating cavity cannot leak out along the inlet under the action of negative pressure, the foam in the accommodating cavity can be ensured to be filled compactly, the loss of liquid nitrogen in the inner shell is reduced, and the heat preservation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen tanks, in particular to a heat preservation and protection device for a liquid nitrogen tank. Background Technique

[0002] Liquid nitrogen tanks can generally be divided into two types: liquid nitrogen storage tanks and liquid nitrogen transport tanks. Storage tanks are mainly used for static storage indoors and are not suitable for long-distance transportation during operation. For the convenience of transfer, common liquid nitrogen tanks usually have multiple universal wheels installed at the lower end of the liquid nitrogen tank;

[0003] However, the existing liquid nitrogen tanks have the following defects during use:

[0004] 1. Although the interior of the liquid nitrogen tank is filled with heat-insulating and heat-preserving materials, there is an imperfect filling phenomenon, resulting in defects in loss in the locally vacant filling areas;

[0005] 2. Due to the high height and center of gravity of the liquid nitrogen tank body, and the universal wheels are directly placed on the ground when the tank body is stationary at the lower part of the tank body, the liquid nitrogen tank is prone to tipping and side-sliding, posing certain potential safety hazards.

[0006] The above content is only used to assist in understanding the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Content of the Utility Model

[0007] The purpose of the utility model is to provide a heat preservation and protection device for a liquid nitrogen tank, so as to solve the problems in the above background technique that there is an imperfect filling phenomenon in the heat-insulating materials in the internal heat-insulating area of the existing liquid nitrogen tank, resulting in defects in loss in the locally vacant filling areas, and due to the high height and center of gravity of the liquid nitrogen tank body, and the universal wheels are directly placed on the ground when the tank body is stationary at the lower part of the tank body, the liquid nitrogen tank is prone to tipping and side-sliding, posing certain potential safety hazards.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] A heat preservation and protection device for a liquid nitrogen tank, comprising:

[0010] A liquid nitrogen tank assembly, including a housing, an inner housing provided inside the housing for storing liquid nitrogen in and out, and a receiving cavity for filling heat-insulating materials is provided between the housing and the inner housing;

[0011] A protection assembly, including a limiting mechanism for limiting the liquid nitrogen tank assembly, and a blocking mechanism provided on one side of the limiting mechanism for blocking the liquid nitrogen tank assembly.

[0012] Further, the liquid nitrogen tank assembly further includes:

[0013] An inlet is provided at a lower position on one side of the outer shell. A first sealing cover for closing the inlet is connected to the outer shell at the inlet.

[0014] An outlet is provided at an upper position on one side of the outer shell. A second sealing cover for sealing the outlet is connected to the outer shell at the outlet.

[0015] Support columns are connected between the outer shell and the inner shell and are used to support the inner shell in the middle of the inner part of the outer shell.

[0016] Universal wheels are installed at the lower end of the outer shell.

[0017] Furthermore, the side surface of the outer shell where the inlet is opened is opposite to the side surface of the outer shell where the outlet is opened, which is used to increase the flow track of the heat insulation material in the accommodation cavity.

[0018] Furthermore, the limiting mechanism includes:

[0019] A surrounding plate is sleeved outside the outer shell. The surrounding plate is in a U shape and is used to limit the outer shell.

[0020] A bottom plate is fixedly inserted at a lower position inside the surrounding plate and is used to support the liquid nitrogen tank assembly.

[0021] A guide groove is provided through the side opening of the surrounding plate and is used to guide the movement of the blocking mechanism.

[0022] A limiting port is provided at the side opening of the outer shell and corresponds to the guide groove, and is used to limit one end of the blocking mechanism.

[0023] Furthermore, one side of the bottom plate located at the opening of the surrounding plate is set as an inclined surface, which is used to guide the liquid nitrogen tank assembly to the upper end of the bottom plate.

[0024] Furthermore, the blocking mechanism includes:

[0025] A pull-out plate is slidably inserted inside the guide groove. A positioning hole is provided inside the pull-out plate, and a threaded hole corresponding to the positioning hole is provided at one end of the surrounding plate.

[0026] A bolt is threadedly connected inside the threaded hole and is used to penetrate the positioning hole to position the pull-out plate.

[0027] Compared with the prior art, the beneficial effects of the present utility model are:

[0028] 1. The utility model injects foam into the accommodating cavity by respectively opening the second sealing cover and the first sealing cover, docking the foam injection pipe with the inlet, and then inputting the foam into the accommodating cavity. During this process, the foam gradually spreads upward from the bottom of the accommodating cavity until the accommodating cavity is filled. After that, the excess foam is discharged from the outlet. Then, stop injecting foam at the inlet, seal the outlet with the second sealing cover respectively, disassemble the foam injection pipe, and seal the inlet with the first sealing cover. During this process, since the outlet is sealed first, when the foam injection pipe is disassembled from the inlet, the foam in the accommodating cavity will not leak out along the inlet under the action of negative pressure, thus ensuring that the foam in the accommodating cavity can be filled densely, reducing the loss of liquid nitrogen in the inner shell, and having good heat preservation effect.

[0029] 2. The utility model pushes the outer shell along the opening on one side of the fence board. The outer shell drives the outer wheel to roll from the ground to the bottom plate through the inclined surface. At this time, push the pull plate along the guide groove, so that the pull plate blocks the opening on one side of the fence board. When one end of the pull plate is pushed into the limit port and the positioning hole is pushed to be coaxial with the threaded hole, screw the bolt into the positioning hole through the threaded hole, so that the universal wheel and the lower part of the outer shell are limited within the inner area of the fence board. With such a design, the contact between the bottom plate and the ground can replace the contact between the universal wheel and the ground, increasing the supporting area between the bottom of the outer shell and the ground, ensuring that the outer shell is not prone to tipping, and the fence board can limit the universal wheel through cooperation with the outer shell, avoiding the hidden danger of side slip of the universal wheel. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0031] Figure 2 is a schematic diagram of the internal structure of the liquid nitrogen tank assembly of the utility model;

[0032] Figure 3 is a schematic diagram of the working process of the adjustment of the blocking mechanism of the utility model;

[0033] Figure 4 is a schematic diagram of the structure of the limiting mechanism of the utility model.

[0034] Reference numerals: 1. Liquid nitrogen tank assembly; 11. Outer shell; 111. Support column; 112. Inlet; 113. Outlet; 12. First sealing cover; 13. Second sealing cover; 14. Inner shell; 15. Accommodating cavity; 16. Universal wheel; 2. Protection assembly; 21. Limiting mechanism; 211. Fence board; 212. Bottom plate; 2121. Inclined surface; 213. Guide groove; 214. Threaded hole; 215. Limit port; 22. Blocking mechanism; 221. Pull plate; 2211. Positioning hole; 222. Bolt. Detailed Description of the Preferred Embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. 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.

[0036] Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0037] A thermal insulation and protection device for a liquid nitrogen tank, comprising:

[0038] The liquid nitrogen tank assembly 1 includes a housing 11 and an inner shell 14 disposed inside the housing 11 for storing liquid nitrogen in and out. A receiving cavity 15 for filling thermal insulation materials is provided between the housing 11 and the inner shell 14;

[0039] The protection assembly 2 includes a limiting mechanism 21 for limiting the liquid nitrogen tank assembly 1 and a blocking mechanism 22 disposed on one side of the limiting mechanism 21 for blocking the liquid nitrogen tank assembly 1.

[0040] As an improvement, as Figures 1-2 shown, the liquid nitrogen tank assembly 1 further includes:

[0041] An inlet 112 is disposed at the lower part of one side of the housing 11, and a first sealing cover 12 for closing the inlet 112 is connected to the housing 11 at the inlet 112;

[0042] An outlet 113 is disposed at the upper part of one side of the housing 11, and a second sealing cover 13 for sealing the outlet 113 is connected to the housing 11 at the outlet 113;

[0043] Support columns 111 are connected between the housing 11 and the inner shell 14 for supporting the inner shell 14 in the middle of the housing 11;

[0044] Universal wheels 16 are installed at the lower end of the housing 11.

[0045] Furthermore, as Figure 2 shown, the side surface of the housing 11 where the inlet 112 is opened is opposite to the side surface of the housing 11 where the outlet 113 is opened, which is used to increase the flow path of the thermal insulation material in the receiving cavity 15.

[0046] As an improvement, as Figures 3-4 shown, the limiting mechanism 21 includes:

[0047] A surrounding plate 211 is sleeved outside the housing 11, and the surrounding plate 211 is in a U shape for limiting the housing 11;

[0048] The bottom plate 212 is fixedly inserted at the lower part inside the enclosing plate 211 and is used to support the liquid nitrogen tank assembly 1.

[0049] The guide groove 213 is arranged through the side opening of the enclosing plate 211 and is used to guide the movement of the blocking mechanism 22.

[0050] The limiting port 215 is arranged at the side opening of the outer shell 11 and corresponds to the guide groove 213, and is used to limit one end of the blocking mechanism 22.

[0051] Furthermore, one side of the bottom plate 212 located at the opening of the enclosing plate 211 is set as an inclined surface 2121, which is used to guide the liquid nitrogen tank assembly 1 to the upper end of the bottom plate 212.

[0052] Even further, the blocking mechanism 22 includes:

[0053] The pull-out plate 221 is slidably inserted inside the guide groove 213. A positioning hole 2211 is arranged inside the pull-out plate 221, and a threaded hole 214 corresponding to the positioning hole 2211 is arranged at one end of the enclosing plate 211.

[0054] The bolt 222 is threadedly connected inside the threaded hole 214 and is used to penetrate the positioning hole 2211 to position the pull-out plate 221.

[0055] It should be added that in the present utility model, heat preservation and heat insulation are carried out by injecting foam into the accommodation cavity 15.

[0056] It should be noted that: as Figures 1-2 shown, in the specific implementation process of the present utility model, the second sealing cover 12 and the first sealing cover 13 are respectively opened, the foam injection pipe is docked with the inlet 112, and then the foam is input into the accommodation cavity 15. In this process, the foam gradually spreads upward from the bottom of the accommodation cavity 15 until the accommodation cavity 15 is filled. After that, the excess foam is discharged from the outlet 113. Stop injecting foam at the inlet 112, and respectively use the second sealing cover 13 to seal the outlet 113, disassemble the foam injection pipe, and seal the inlet 112 through the first sealing cover 12. In this process, since the outlet 113 is sealed first, when the foam injection pipe is disassembled from the inlet 112, the foam in the accommodation cavity 15 will not leak along the inlet 112 under the action of negative pressure, so as to ensure that the foam in the accommodation cavity 15 can be kept filled and dense, reduce the liquid nitrogen loss in the inner shell 14, and have a good heat preservation effect;

[0057] As Figures 3-4As shown, in addition, when the outer shell 11 in the present utility model is placed statically on the ground through the universal wheels 16, by pushing the outer shell 11 along the opening on one side of the enclosure plate 211, the outer shell 11 drives the outer wheels 16 to roll from the ground through the inclined surface 2121 onto the bottom plate 212. At this time, by pushing the draw plate 221 along the guide groove 213, the draw plate 221 blocks the opening on one side of the enclosure plate 211. When one end of the draw plate 221 is pushed into the limit port 215 and the positioning hole 2211 is pushed to be coaxial with the threaded hole 214, the bolt 222 is screwed into the positioning hole 2211 through the threaded hole 214, so that the universal wheels 16 and the lower part of the outer shell 11 are limited within the inner area of the enclosure plate 211. With this design, the contact between the bottom plate 212 and the ground can replace the contact between the universal wheels 16 and the ground, increasing the supporting area between the bottom of the outer shell 11 and the ground, ensuring that the outer shell 11 is not prone to tipping over, and the enclosure plate 211 can limit the universal wheels 16 by cooperating with the outer shell 11, avoiding the hidden danger of side slip of the universal wheels.

[0058] It should be noted that in this article, 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A heat preservation and protection device for a liquid nitrogen tank, characterized in that, Comprising: A liquid nitrogen tank assembly (1), including a housing (11), an inner shell (14) disposed inside the housing (11) for storing and discharging liquid nitrogen, and a receiving cavity (15) provided between the housing (11) and the inner shell (14) for filling thermal insulation material. A protection assembly (2), including a limiting mechanism (21) for limiting the liquid nitrogen tank assembly (1), and a blocking mechanism (22) disposed on one side of the limiting mechanism (21) for blocking the liquid nitrogen tank assembly (1).

2. The liquid nitrogen tank thermal insulation and protection device according to claim 1, characterized in that: The liquid nitrogen tank assembly (1) further includes: An inlet (112), disposed at a lower position on one side of the housing (11), and a first sealing cover (12) is connected to the housing (11) at the inlet (112) for closing the inlet (112). An outlet (113), disposed at an upper position on one side of the housing (11), and a second sealing cover (13) is connected to the housing (11) at the outlet (113) for sealing the outlet (113). Support columns (111), connected between the housing (11) and the inner shell (14) for supporting the inner shell (14) in the middle inside the housing (11). Universal wheels (16), installed at the lower end of the housing (11).

3. The liquid nitrogen tank thermal insulation and protection device according to claim 2, characterized in that: The side surface of the housing (11) where the inlet (112) is opened is opposite to the side surface of the housing (11) where the outlet (113) is opened, for increasing the flow path of the thermal insulation material in the receiving cavity (15).

4. The liquid nitrogen tank thermal insulation and protection device according to claim 1, characterized in that: The limiting mechanism (21) includes: A fence (211), sleeved outside the housing (11), and the fence (211) is in a U shape for limiting the housing (11). A bottom plate (212), fixedly inserted at a lower position inside the fence (211) for supporting the liquid nitrogen tank assembly (1). A guide groove (213), penetrating through the side opening of the fence (211) for guiding the movement of the blocking mechanism (22). A limiting opening (215), disposed at the side opening of the housing (11) and corresponding to the guide groove (213) for limiting one end of the blocking mechanism (22).

5. The liquid nitrogen tank thermal insulation and protection device according to claim 4, characterized in that: One side of the bottom plate (212) located at the opening of the fence (211) is set as an inclined surface (2121) for guiding the liquid nitrogen tank assembly (1) to the upper end of the bottom plate (212).

6. The liquid nitrogen tank thermal insulation and protection device according to claim 5, characterized in that: The blocking mechanism (22) includes: A pull plate (221), slidably inserted inside the guide groove (213), a positioning hole (2211) is provided inside the pull plate (221), and a threaded hole (214) corresponding to the positioning hole (2211) is provided at one end of the fence (211). The bolt (222) is threadedly connected inside the threaded hole (214) and is used to position the draw plate (221) through the positioning hole (2211).

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