Liquid nitrogen tank plug

Abstract

The utility model discloses a liquid nitrogen tank plug. The utility model comprises a plug body which is arranged at an opening of a tank body; the plug body comprises a connecting layer which is arranged at the opening of the tank body and corresponds to the caliber of the tank body; the heat preservation layer is detachably arranged at the bottom of the connecting layer and is in space contact with the tank body inner container; the protective layer is detachably arranged at the top of the connecting layer and covers the opening of the tank body; by means of the plug body formed by modularly combining the protective layer, the connecting layer and the heat preservation layer, a worker can replace the heat preservation layers with different heat conductivity coefficients according to the actual working environment to adapt to the temperature condition of the liquid nitrogen container inner container, the protective layer is designed to protect the connecting layer and the heat preservation layer while the heat preservation effect is not affected, and the heat preservation effect is improved. And independent replacement can be carried out, and the applicability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid nitrogen tank accessories, and in particular to a liquid nitrogen tank stopper. Background Technology

[0002] A liquid nitrogen tank is a cryogenic storage device that utilizes the extremely low temperature characteristics of liquid nitrogen to preserve biological samples for a long time. Its core function is to maintain the low temperature environment of liquid nitrogen through vacuum insulation technology. It is commonly used in the fields of biomedicine, aerospace industry and other technical fields.

[0003] Traditional liquid nitrogen tank stoppers are mostly made of a single material. Because their thermal conductivity is constant, their heat preservation capabilities are limited. When facing different ambient temperatures, the stopper is difficult to effectively prevent external heat from being conducted into the tank, thus limiting its applicability.

[0004] Therefore, a liquid nitrogen tank stopper that can improve the heat preservation effect was proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a liquid nitrogen tank stopper that improves the heat preservation effect.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a liquid nitrogen tank stopper, including a stopper body, disposed at the tank opening;

[0007] The plug body includes:

[0008] A connecting layer is installed at the tank opening and corresponds to its diameter;

[0009] The insulation layer is detachably installed at the bottom of the connecting layer and contacts the inner liner space of the tank, used to seal the tank and prevent external heat from being conducted into the tank;

[0010] A protective layer, detachably disposed on top of the connecting layer and covering the tank opening, is used to protect the connecting layer and the insulation layer.

[0011] Furthermore, a cavity is formed in the connecting layer;

[0012] The chamber is equipped with a temperature-controlled component, including:

[0013] A partition frame is disposed within the cavity and divides the cavity space into a honeycomb array;

[0014] The heat-conducting unit is located inside each honeycomb hole to maintain the internal temperature of the plug.

[0015] Furthermore, the protective layer, the connecting layer, and the partition are all made of thermally conductive materials to construct a heat conduction path. When the thermally conductive unit absorbs heat, the heat is conducted in a stepped manner through the partition and the connecting layer to the protective layer to dissipate heat.

[0016] Furthermore, both the bottom of the protective layer and the top of the insulation layer are provided with connecting grooves;

[0017] Both ends of the connecting layer are provided with connecting rings, and each connecting ring is threadedly connected to the corresponding connecting groove to form an interlayer positioning and sealing structure.

[0018] Furthermore, the protective layer consists of a protective part covering the end face of the tank opening and a connecting part disposed below it and threadedly connected to the tank opening. The protective part covering the end face of the pipe opening is provided with a sealing ring for gap compensation.

[0019] Furthermore, the surface of the connecting layer is also fitted with a gripping ring to facilitate the gripping of workers.

[0020] The beneficial effects of this utility model are reflected in:

[0021] This invention, through a plug body modularly composed of a protective layer, a connecting layer, and an insulation layer, allows workers to replace the insulation layer with different thermal conductivity coefficients according to the actual working environment, thus adapting to the temperature conditions of the liquid nitrogen tank liner. The design of the protective layer, without affecting the insulation effect, can protect the connecting layer and the insulation layer, and can be replaced independently, improving applicability. Attached Figure Description

[0022] Figure 1 This is a perspective view of the liquid nitrogen tank stopper described in this utility model;

[0023] Figure 2 This is a cross-sectional view of the plug of the liquid nitrogen tank described in this utility model.

[0024] In the picture:

[0025] 1. Plug body; 11. Connecting layer; 111. Chamber; 112. Connecting ring; 12. Insulation layer; 13. Protective layer; 131. Protective part; 132. Connecting part; 2. Temperature control component; 21. Divider; 22. Heat conduction unit; 3. Connecting groove; 4. Sealing ring; 5. Grip ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0027] Please see Figure 1-2 This utility model discloses a liquid nitrogen tank stopper, including a stopper body 1, which is detachably disposed at the tank opening;

[0028] The plug 1 includes:

[0029] A connecting layer 11 is provided at the opening of the tank and corresponds to its diameter;

[0030] The insulation layer 12 is made of a material with low thermal conductivity. The insulation layer 12 is detachably installed at the bottom of the connecting layer 11 and corresponds to the diameter of the tank opening. It is used to seal the tank and prevent external heat from being conducted into the pipe.

[0031] The protective layer 13 is detachably installed on top of the connecting layer 11 and covers the tank opening, and is used to protect the connecting layer 11 and the insulation layer 12.

[0032] In practice, when the liquid nitrogen tank needs to be shut down, the staff installs the plug 1 at the tank opening. At this time, the insulation layer 12 is in contact with the inner liner of the tank. Since the insulation layer 12 is a material with low thermal conductivity, it can improve the efficiency of preventing external heat from being conducted from the outside of the tank to the inside. At the same time, the protective layer 13 protects the connecting layer 11 and the insulation layer 12, reducing damage caused by accidental external impacts and extending their service life. Furthermore, the staff can adapt the insulation layer 12 with different thermal conductivity according to the actual use of the liquid nitrogen tank. When the protective layer 13 loses its protective function, it can also be replaced separately, further improving its applicability.

[0033] This utility model, through the modular combination of a protective layer 13, a connecting layer 11, and a heat insulation layer 12, allows the operator to replace the heat insulation layer 12 with different thermal conductivity according to the actual working environment, so as to adapt to the temperature conditions of the liquid nitrogen tank liner. The design of the protective layer 13 can protect the connecting layer 11 and the heat insulation layer 12 without affecting the heat insulation effect, and can be replaced independently, thus improving applicability.

[0034] Preferably, the insulation layer 12 can be made of low thermal conductivity materials such as nano-aerogel or polyurethane.

[0035] In one embodiment, a chamber 111 is formed in the connecting layer 11;

[0036] The chamber 111 is equipped with a temperature control component 2, including a partition frame 21 installed in the chamber 111. The partition frame 21 divides the space of the chamber 111 into a honeycomb array. Each honeycomb is equipped with a heat-conducting unit 22 made of phase change material to maintain the internal temperature of the plug 1.

[0037] With this design, when the external temperature changes, the heat-conducting unit 22 can absorb or release heat according to the actual contact temperature based on the characteristics of the phase change material, thereby intercepting the temperature and reducing or increasing the heat gradient conducted to the inner layer to maintain the relative stability of the internal temperature of the can stopper. The partition frame 21 allows each heat-conducting unit 22 to be independently set in the corresponding honeycomb hole to reduce thermal stress concentration and further optimize the heat preservation effect.

[0038] It should be noted that the characteristics and principles of phase change materials are common knowledge to those skilled in the art, and therefore will not be elaborated upon here.

[0039] Sufficient space is reserved in each honeycomb cell for the thermal expansion of the phase change material to ensure the normal operation of the phase change material.

[0040] Preferably, the phase change material can be a fatty acid salt complex from the prior art.

[0041] In one embodiment, the protective layer 13 is made of a material with high thermal conductivity;

[0042] Both the connecting layer 11 and the partition frame 21 are made of thermally conductive material, thereby constructing a heat conduction path. When the heat-conducting unit 22 absorbs or releases heat, the heat of the heat-conducting unit 22 can be conducted to the protective layer 13 in a stepped manner through the partition frame 21 and the connecting layer 11 to achieve directional heat dissipation.

[0043] With this design, when the external temperature is higher than the predetermined value, the phase change material absorbs heat and liquefies. The heat is quickly diffused to the protective layer 13 through the fin structure formed by the partition frame 21, improving heat dissipation efficiency. When the external temperature is lower than the predetermined value, the phase change material solidifies and releases heat. The connecting layer 11 transfers the heat in the opposite direction to the interior of the plug body 1 through thermal conduction, compensating for the cold loss due to liquid nitrogen evaporation.

[0044] Preferably, the protective layer 13, the connecting layer 11 and the partition frame 21 can be made of aluminum alloy, which is a technology in the prior art.

[0045] It should be noted that a low thermal conductivity spacer layer (such as nano-aerogel) is provided at the connection between the protective layer 13 and the connecting layer 11 to prevent external heat from directly penetrating to the insulation layer 12 and causing a thermal short circuit.

[0046] In one embodiment, a connecting groove 3 is provided at the bottom of the protective layer 13 and at the top of the insulation layer 12;

[0047] Both ends of the connecting layer 11 are provided with connecting rings 112, and each connecting ring 112 is threadedly connected to the corresponding connecting groove 3, which together form an interlayer positioning and sealing structure.

[0048] With this design, when the protective layer 13 or the insulation layer 12 needs to be replaced, the operator can simply hold the connecting layer 11 and rotate the protective layer 13 or the insulation layer 12 to separate it from the connecting layer 11, which is a simple operation.

[0049] In one embodiment, the protective layer 13 is composed of a protective part 131 covering the opening end face of the tank body and a connecting part 132 disposed below it and threadedly connected to the opening of the tank body. The protective part 131 covering the opening end face of the tank body is provided with a sealing ring 4 for gap compensation.

[0050] With this design, when the tank opening needs to be closed, the operator rotates the protective layer 13 to screw the connecting part 132 into the sealing ring 4 until the tank opening contacts the sealing ring 4. At this time, the sealing ring 4 is compressed and deformed to seal the gap between the tank opening and the protective part 131. At the same time, the protective part 131 covers and protects the tank opening to reduce the damage caused by accidental impact.

[0051] In one embodiment, the surface of the connecting layer 11 is also fitted with a gripping ring 5 for easy gripping by workers. The surface of the gripping ring 5 has sufficient friction and its diameter is the same as that of the insulation layer 12.

[0052] With this design, when the staff needs to replace the protective layer 13 or the insulation layer 12, the staff can remove the plug 1 and hold the gripping ring 5, thereby increasing the friction of the staff to grip the connecting layer 11 and improving the replacement efficiency. In addition, the diameter of the gripping ring 5 is the same as the diameter of the insulation layer 12, so it will not interfere with the operation of the plug 1 and avoid the plug 1 from being accidentally stuck at the can opening.

[0053] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0054] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0055] Additionally, "multiple" refers to two or more.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A liquid nitrogen tank stopper, characterized in that, Includes a plug (1), which is disposed at the opening of the tank; The plug (1) comprises: A connecting layer (11) is provided at the opening of the tank and corresponds to its diameter; The insulation layer (12) is detachably disposed at the bottom of the connecting layer (11) and in contact with the inner liner space of the tank, for sealing the tank and preventing external heat from being conducted into the tank; A protective layer (13) is detachably disposed on top of the connecting layer (11) and covers the tank opening, for protecting the connecting layer (11) and the insulation layer (12).

2. The liquid nitrogen tank stopper according to claim 1, characterized in that: A cavity (111) is provided in the connecting layer (11); The chamber (111) is equipped with a temperature-controlled component (2), including: A partition frame (21) is disposed in the cavity (111) and divides the space of the cavity (111) into a honeycomb array; A heat-conducting unit (22) is installed in each honeycomb hole to maintain the internal temperature of the plug (1).

3. The liquid nitrogen tank stopper according to claim 2, characterized in that: The protective layer (13), the connecting layer (11) and the partition frame (21) are all made of thermally conductive material to construct a heat conduction path. When the heat-conducting unit (22) absorbs heat, the heat is conducted to the protective layer (13) in a stepped manner through the partition frame (21) and the connecting layer (11) to achieve heat dissipation.

4. The liquid nitrogen tank stopper according to claim 1, characterized in that: The bottom of the protective layer (13) and the top of the insulation layer (12) are both provided with connecting grooves (3); Both ends of the connecting layer (11) are provided with connecting rings (112), and each connecting ring (112) is threadedly connected to the corresponding connecting groove (3) to form an interlayer positioning and sealing structure.

5. The liquid nitrogen tank stopper according to claim 1, characterized in that: The protective layer (13) consists of a protective part (131) covering the end face of the tank opening and a connecting part (132) located below it and threadedly connected to the tank opening. The protective part (131) covering the end face of the pipe opening is provided with a sealing ring (4) for gap compensation.

6. The liquid nitrogen tank stopper according to claim 1, characterized in that: The surface of the connecting layer (11) is also fitted with a gripping ring (5) to facilitate the gripping of workers.

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