Liquid nitrogen tank for cold shock test

Abstract

The utility model discloses a liquid nitrogen tank for a cold shock test. The liquid nitrogen tank comprises a box body for storing a biological sample and a cover plate for covering the box body, the outer edge of the box body is not in contact with the inner wall of the cover plate; a spacing layer is formed between the box body and the cover plate, so that the end face of the box body is not in contact with the cover plate. The biological sample box has the advantages that the box body and the cover plate are separated through the spacing layer, it is guaranteed that the box body and the cover plate cannot be frozen when the biological sample box is used, then the cover body can be conveniently opened or closed, biological samples can be stored in the box body, and the utilization rate of the whole device is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to processing equipment technical field, especially, it is related to a cold impact test liquid nitrogen tank. BACKGROUND

[0002] Liquid nitrogen is an extremely cold liquid, its temperature can reach minus 196 degrees Celsius (-321 degrees Fahrenheit), which is almost one of the coldest natural state liquids on earth. The extremely low temperature of liquid nitrogen makes it have wide application in scientific research, medicine, food industry and other fields.

[0003] In the medical research, when freezing biological samples such as sperm, egg and embryo, the extremely low temperature of liquid nitrogen is very useful. And liquid nitrogen is also used to preserve medical cells and tissues for subsequent research and treatment. In these applications, the extremely low temperature helps to prevent the decomposition and degradation of cells and tissues.

[0004] In the prior art, liquid nitrogen tank is usually used to store biological samples, and the structure of the liquid nitrogen tank can refer to patent CN210398370U, "a liquid nitrogen tank". Since the nitrogen gas generated after the liquefaction of liquid nitrogen will replace the oxygen in the air, the oxygen concentration will be reduced, which will cause suffocation, so the prior art including this technical solution has the risk of inhaling nitrogen gas or being frozen by nitrogen gas. And it is extremely possible that the cover plate will be frozen with the tank body under low temperature conditions.

[0005] To solve the above problems, designing a cold impact test liquid nitrogen tank is an important technical problem for the technical personnel in the field at present. CONTENT OF THE UTILITY MODEL

[0006] The purpose of the utility model is to solve the above problems existing in the prior art, provide a cold impact test liquid nitrogen tank.

[0007] The purpose of the utility model is realized by the following technical scheme:

[0008] A cold impact test liquid nitrogen tank, comprising a box body for storing biological samples and a cover plate covering the box body, the outer edge of the box body is not in contact with the inner wall of the cover plate, and a spacing layer is formed between the box body and the cover plate, so that the end face of the box body is not in contact with the cover plate.

[0009] Preferably, the box body comprises an outer box body, an inner box body and a rock wool layer, and the rock wool layer is located between the outer box body and the inner box body.

[0010] Preferably, the box body is further provided with a through hole for installing a pipeline, and liquid nitrogen enters the inner box body through the pipeline.

[0011] Preferably, the spacing layer is arranged on the rock wool layer and is fixed to the outer box body and the inner box body by screws.

[0012] Preferably, the upper surface of the spacing layer protrudes from the upper surface of the box body, and the outer side of the spacing layer protrudes from the outer side of the outer box body and is in contact with the inner wall of the cover plate.

[0013] Preferably, the cross section of the spacing layer is L-shaped or T-shaped.

[0014] Preferably, the upper surface of the cover plate is provided with at least one handle, and the handle is internally provided with a rock wool layer.

[0015] Preferably, the box body and the cover plate are made of metal materials, and the spacing layer is made of a non-metal material.

[0016] Preferably, the bottom of the outer box body is provided with a group of universal wheels, and at least two of the universal wheels are provided with brake structures.

[0017] The advantages of the technical scheme of the utility model mainly embody in:

[0018] The box body and the cover plate are spaced apart by the spacing layer, so that the box body and the cover plate will not freeze during use, and the cover body can be conveniently opened or closed, so that biological samples can be accessed in the box body, and the use rate of the overall equipment is improved.

[0019] The rock wool layer is used as a sandwich in the box body to achieve the heat preservation effect.

[0020] The box body, the cover plate and the spacing layer are made of different materials, and the conductor difference between the materials effectively prevents the freezing of the box body and the cover plate, so that the cover plate cannot be opened. DRAWINGS

[0021] Fig. 1 : the use state perspective view of the preferred embodiment of the utility model;

[0022] Fig. 2 : the storage state perspective view of the preferred embodiment of the utility model;

[0023] Fig. 3 : the cross-sectional view of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0024] The purpose, advantages and characteristics of the utility model will be illustrated and explained by the following non-limiting description of the preferred embodiment. These embodiments are only typical examples of the application of the technical scheme of the utility model, and any technical scheme formed by equivalent replacement or equivalent transformation falls within the scope of the utility model.

[0025] In the description of the scheme, it needs to be explained that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. And in the description of the scheme, with reference to the operator, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0026] As shown in Figs. 1-3 The utility model discloses a cold impact test liquid nitrogen tank, including the box body 1 for depositing biological sample and the cover plate 2 of covering the box body 1, and the outer edge of the box body 1 is not contacted with the inner wall of the cover plate 2. Specifically, as shown in Figs. 2-3 The box body 1 includes outer box body 11, inner box body 12 and rock wool layer 13. Wherein, a group of universal wheels 4 are arranged on the bottom of the outer box body 11, and brake structure is arranged on at least two of the universal wheels 4. The universal wheels are arranged on the bottom of the box body 1, which can facilitate the quick movement of the box body 1 and the biological samples stored therein, and the brake structure can limit the position of the box body after reaching the destination, ensuring the stability of the box body during loading and unloading. The rock wool layer 13 is located between the outer box body 11 and the inner box body 12. When the rock wool layer is used as a sandwich for partitioning in the box body, the rock wool layer can work normally even if the inner box body 12 stores low-temperature objects, including liquid nitrogen with a storage temperature range of-196 DEG C to +650 DEG C, because the rock wool has the characteristics of low temperature resistance. Moreover, the rock wool material has good compression resistance, and will not lose its thermal insulation performance due to cold shrinkage at low temperature, because the fiber mechanism inside the surface material is not involved, can effectively absorb vibration and impact, thereby avoiding breaking or tearing, and can compensate for the shortcomings of other materials, such as easy deformation and brittleness at low temperature.

[0027] Further, as shown in Fig. 1 The box body 1 is also provided with a through hole for mounting a pipeline 14; liquid nitrogen enters the inner box body 12 through the pipeline 14, effectively preserving the biological samples stored in the inner box body 12, and preventing the decomposition and degradation of cells or tissues.

[0028] Since a large amount of nitrogen gas is generated when liquid nitrogen is vaporized, if the human body is exposed to liquid nitrogen without protective measures, the skin may be severely frostbitten. If the nitrogen gas generated at normal pressure is excessive, the oxygen partial pressure in the air may be reduced, causing oxygen deficiency asphyxia. Therefore, the box needs to be sealed, so that the inner box 12 and the internal storage space are isolated from the outside world, and the liquid nitrogen is poured into the pipeline 14 after the box 1 is covered by the cover plate 2. As shown in Figs. 1-2 In order to quickly cover the box 1 with the cover plate 2, at least one handle 21 is preferably arranged on the upper surface of the cover plate 2, and a rock wool layer is arranged in the handle 21, which plays a heat preservation role through the rock wool layer, facilitating taking. In addition, in other embodiments, a layer of known material with heat insulation performance, such as rock wool, rubber, silica gel, etc. can be wrapped around the periphery of the handle 21; or the handle 21 is made of known material with high and low temperature resistance, which will not be described here.

[0029] Further, the box 1 and the cover plate 2 are made of metal material, and more preferably, the box 1 and the cover plate 2 are made of 304 stainless steel material, and the thickness is preferably 3mm. Among them, the cover plate 2 is preferably 23.55 kg, and the box 1 can withstand a pressure of 70MPa, which can meet the demand of liquid nitrogen cold impact. However, since the box 1 and the cover plate 2 are made of metal material, and metal is a good thermal conductor, when the liquid nitrogen enters the inner box 12, its temperature will rapidly decrease below freezing point, and the temperature of the cover plate 2 and / or the inner box 12 will cause part of the ice to melt into water, which will again flow onto the inner box 12 to form ice again, which will cause the cover plate 2 and the box 1 to freeze, causing the cover plate 2 to be unable to open.

[0030] As shown in Fig. 2 Or Fig. 3 In order to avoid the occurrence of the above-mentioned adverse conditions, a spacing layer 3 is formed between the box 1 and the cover plate 2 in the utility model, which is made of non-metallic material; and the spacing layer 3 is preferably made of wood. The spacing layer 3 makes the end surface of the box 1 not in contact with the cover plate 2. Specifically, the cross section of the spacing layer 3 is L-shaped or T-shaped; and the spacing layer 3 is arranged on the rock wool layer 13 and fixed with the outer box 11 and the inner box 12 through screws.

[0031] Further, the upper surface of the spacing layer 3 protrudes from the upper surface of the box 1; and the outer side of the spacing layer 3 protrudes from the outer side of the outer box 1 and is in contact with the inner wall of the cover plate 2. The box is separated from the cover plate 2 by the spacing layer 3, and the spacing layer 3 and the cover plate 2 are made of different materials, which effectively avoids the freezing of the box and the cover plate, so that the cover plate cannot be opened.

[0032] The utility model still has a plurality of implementation manners, all technical schemes formed by using equivalent transformation or equivalent transformation, all fall in the protection scope of the utility model.

Claims

1. A cold impact test liquid nitrogen tank characterized by: The application relates to a box (1) for storing biological samples and a cover plate (2) covering the box (1); the outer edge of the box (1) is not in contact with the inner wall of the cover plate (2); a spacing layer (3) is arranged between the box (1) and the cover plate (2), so that the end surface of the box (1) is not in contact with the cover plate (2).

2. A cold shock test liquid nitrogen tank according to claim 1, characterized in that: The box (1) comprises an outer box (11), an inner box (12) and a rock wool layer (13); the rock wool layer (13) is arranged between the outer box (11) and the inner box (12).

3. A cold shock test liquid nitrogen tank according to claim 2, characterized in that: A through hole for mounting a pipeline (14) is arranged on the box (1); liquid nitrogen enters the inner box (12) through the pipeline (14).

4. The cold soak test liquid nitrogen tank of claim 2, wherein: The spacing layer (3) is arranged on the rock wool layer (13) and is fixed with the outer box (11) and the inner box (12) through screws.

5. A cold shock test liquid nitrogen tank according to claim 4, characterized in that: The upper surface of the spacing layer (3) protrudes from the upper surface of the box (1); the outer side of the spacing layer (3) protrudes from the outer side of the outer box (11) and is in contact with the inner wall of the cover plate (2).

6. A cold shock test liquid nitrogen tank according to claim 5, characterized in that: The cross section of the spacing layer (3) is L-shaped or T-shaped.

7. The cold soak test liquid nitrogen tank of claim 1, wherein: At least one handle (21) is arranged on the upper surface of the cover plate (2); the handle (21) is internally provided with a rock wool spacing layer.

8. The cold soak test liquid nitrogen tank of claim 1, wherein: The box (1) and the cover plate (2) are made of metal materials; the spacing layer (3) is made of non-metal materials.

9. The cold soak test liquid nitrogen tank of claim 2, wherein: A group of universal wheels (4) are arranged on the bottom of the outer box (11); brake structures are arranged on at least two universal wheels (4).

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