阅读说明：本技术 一种多层颈口结构的液氮生物容器 (Liquid nitrogen biological container with multilayer neck structure ) 是由 黄仕虎 唐文明 杨科惠 于 2020-06-16 设计创作，主要内容包括：本发明涉及液氮生物容器领域,公开了一种多层颈口结构的液氮生物容器,包括外壳、内容器和冻存托盘,内容器通过其上端的颈口部件和吊装管与外壳固定连接使内容器吊装在外壳之内,外壳和内容器之间形成真空夹层,颈口部件为可延长导热路径的多层结构；外壳与内容器之间的真空夹层中设有底部支撑结构和多个侧向支撑结构,底部支撑结构和侧向支撑结构用于保持外壳与内容器的同轴性。本发明解决了现有液氮生物容器颈口漏冷量大的问题,还可解决液氮生物容器外壳和内容器之间同轴性差的问题。(The invention relates to the field of liquid nitrogen biological containers, and discloses a liquid nitrogen biological container with a multilayer neck structure, which comprises an outer shell, an inner container and a freezing tray, wherein the inner container is fixedly connected with the outer shell through a neck part and a hoisting pipe at the upper end of the inner container so that the inner container is hoisted in the outer shell, a vacuum interlayer is formed between the outer shell and the inner container, and the neck part is of a multilayer structure capable of prolonging a heat conduction path; a bottom supporting structure and a plurality of lateral supporting structures are arranged in a vacuum interlayer between the outer shell and the inner container and are used for keeping the coaxiality of the outer shell and the inner container. The invention solves the problem of large cold leakage quantity of the neck opening of the existing liquid nitrogen biological container, and also can solve the problem of poor coaxiality between the outer shell and the inner container of the liquid nitrogen biological container.)

1. The utility model provides a liquid nitrogen biological container of multilayer neck-finish structure, includes shell (4), inner container (6) and freezes deposits tray (7), its characterized in that: the inner container (6) is fixedly connected with the outer shell (4) through a neck part (1) and a hoisting pipe (2) at the upper end of the inner container, so that the inner container (6) is hoisted in the outer shell (4), a vacuum interlayer (5) is formed between the outer shell (4) and the inner container (6), and the neck part (1) is of a multilayer structure capable of extending a heat conduction path; a bottom supporting structure (8) and a plurality of lateral supporting structures (3) are arranged in a vacuum interlayer (5) between the outer shell (4) and the inner container (6), and the bottom supporting structure (8) and the lateral supporting structures (3) are used for keeping the coaxiality of the outer shell (4) and the inner container (6).

2. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 1, characterized in that: the neck part (1) comprises a first neck pipe (101) which is hermetically welded with the outer shell (4) and the inner container (6), the first neck pipe (101) and a second neck pipe (104) are welded to form a multilayer structure with a neck interlayer, and the first neck pipe (101) is provided with a first annular notch (107) communicated with the vacuum interlayer (5).

3. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 2, characterized in that: a second annular notch (105) communicated with the neck opening interlayer is formed in the second neck pipe (104), the upper end of the second annular notch (105) is welded with the lower end of a third neck pipe (103) in the neck opening interlayer, and the lower end of the second annular notch (105) is welded with the upper end of a fourth neck pipe (106) in the neck opening interlayer; a fifth neck pipe (102) is arranged in the neck opening interlayer, and the upper end and the lower end of the fifth neck pipe (102) are respectively welded with the upper end of a third neck pipe (103) and the lower end of the fifth neck pipe (102); and interlayer gaps are reserved among the fifth neck pipe (102), the first neck pipe (101), the third neck pipe (103) and the fourth neck pipe (106), and interlayer gaps are reserved among the third neck pipe (103), the fourth neck pipe (106) and the second neck pipe (104).

4. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 1, characterized in that: the lateral supporting structure (3) comprises a mounting seat (301) arranged on the outer wall of the inner container (6), the mounting seat (301) is fixedly connected with one end of a supporting plate (302), and the other end of the supporting plate (302) is in friction contact with the inner wall of the shell (4).

5. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 4, characterized in that: the contact end (303) of the support plate (302) abutting against the shell (4) is of an arc-shaped surface structure, and the arc-shaped surface structure is in line contact with the inner wall of the shell (4).

6. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 4, characterized in that: the contact end (303) of the support plate (302) abutting against the shell (4) is of a spherical surface structure, and the spherical surface structure is in point contact with the inner wall of the shell (4).

7. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 4, characterized in that: the mounting seat (301) is two U-shaped grooves arranged at intervals, the supporting plate (302) is in an arch bridge shape, and two supporting legs (304) of the arch bridge-shaped supporting plate (302) are clamped into the two U-shaped grooves.

8. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 1, characterized in that: bottom sprag structure (8) including vertical setting at support column (801) of shell (4) bottom central authorities and vertical setting including container (6) bottom central authorities and with sleeve (802) of support column (801) adaptation, support column (801) stretch into in sleeve (802) and offset with sleeve (802) bottom surface.

9. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 8, characterized in that: the support (12) that are used for propping up freezing tray (7) are equipped with in sleeve (802) outside, support (12) top is equipped with bearing (11), bearing (11) inner circle and pivot (10) fixed connection of locating freezing tray (7) bottom.

10. The liquid nitrogen biocontainer of multilayer neck-finish structure according to claim 1, characterized in that: the inner container (6) is connected with one side of the upper end of the outer shell (4) through an anti-rotation pin (9).

Technical Field

The invention relates to the field of liquid nitrogen biological containers, in particular to a liquid nitrogen biological container with a multilayer neck structure.

Background

Liquid nitrogen, which is a liquid form formed by nitrogen gas at low temperature. The liquid nitrogen has wide application, can quickly freeze food, make ice products, preserve living tissues, perform low-temperature physics research and the like. The liquid nitrogen biological container is a biological container for storing biological samples by utilizing the low-temperature property of liquid nitrogen.

The structure of the existing liquid nitrogen biological container is mainly divided into three parts, namely an outer container, an inner container (comprising a neck opening) and a freezing tray, wherein the inner container is filled with liquid nitrogen to provide a temperature field for low-temperature preservation, the freezing tray is arranged at the bottom of the inner container to provide a freezing space for biological samples, and the outer container is sleeved outside the inner container and forms a vacuum interlayer between the outer container and the inner container to shield the convection heat exchange between the inner container and the outer container so as to prevent the cold energy in the inner container from leaking as far as possible, thereby enabling the liquid nitrogen biological container to have excellent heat insulation performance. However, the existing liquid nitrogen biological container still has the following problems:

firstly, the neck of the existing liquid nitrogen biological container has large cold leakage quantity, thereby causing the cycle of the liquid nitrogen maintaining temperature field to be reduced and the utilization rate of the liquid nitrogen to be reduced. Moreover, due to large heat leakage, the temperature of the neck opening and the area of the shell upper end enclosure close to the neck opening is low, which can cause the phenomenon of water condensation or frost formation in the neck opening area and influence the appearance beauty of the tank body;

secondly, the coaxiality between the outer shell and the inner container of the conventional liquid nitrogen biological container is poor, so that the neck opening can be subjected to stress concentration due to eccentric moment, and the safety of the liquid nitrogen biological container is reduced.

Disclosure of Invention

Based on the technical problems, the invention provides a liquid nitrogen biological container with a multilayer neck structure, which solves the problem of large cold leakage quantity of the neck of the conventional liquid nitrogen biological container and also solves the problem of poor coaxiality between an outer shell and an inner container of the liquid nitrogen biological container.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a liquid nitrogen biological container with a multilayer neck structure comprises an outer shell, an inner container and a freezing tray, wherein the inner container is fixedly connected with the outer shell through a neck part and a hoisting pipe at the upper end of the inner container so that the inner container is hoisted in the outer shell, a vacuum interlayer is formed between the outer shell and the inner container, and the neck part is of a multilayer structure capable of extending a heat conduction path; a bottom supporting structure and a plurality of lateral supporting structures are arranged in a vacuum interlayer between the outer shell and the inner container and are used for keeping the coaxiality of the outer shell and the inner container.

In the invention, the inner container is suspended on the outer upper end socket of the shell through the neck part and the hoisting pipe, an interlayer is left between the suspended inner container and the shell, and the interlayer is vacuumized to form a vacuum interlayer for shielding the inner container to carry out convection heat exchange with the outside, so that the whole structure of the liquid nitrogen biological container has excellent heat insulation performance. The neck part with the multilayer structure can effectively prolong the heat conduction path at the neck, and reduce the cold leakage at the neck, thereby improving the utilization rate of liquid nitrogen. And the bottom supporting structure and the plurality of lateral supporting structures are used for keeping the coaxiality of the outer container and the inner container, and the coaxial arrangement of the outer container and the inner container can reduce the stress concentration condition of the neck part caused by eccentric moment of the neck part under the working condition and ensure the safety of the liquid nitrogen biological container structure.

Preferably, the neck part comprises a first neck pipe hermetically welded with the outer shell and the inner container, the first neck pipe and a second neck pipe are welded to form a multilayer structure with a neck interlayer, and the first neck pipe is provided with a first annular notch communicated with the vacuum interlayer.

As a preferable mode, a second annular notch communicated with the neck opening interlayer is arranged on the second neck tube, the upper end of the second annular notch is welded with the lower end of a third neck tube positioned in the neck opening interlayer, and the lower end of the second annular notch is welded with the upper end of a fourth neck tube positioned in the neck opening interlayer; a fifth neck pipe is arranged in the neck opening interlayer, and the upper end and the lower end of the fifth neck pipe are respectively welded with the upper end of the third neck pipe and the lower end of the fifth neck pipe; and interlayer gaps are reserved among the fifth neck pipe, the first neck pipe, the third neck pipe and the fourth neck pipe, and interlayer gaps are reserved among the third neck pipe, the fourth neck pipe and the second neck pipe.

Preferably, the lateral support structure comprises a mounting seat arranged on the outer wall of the inner container, the mounting seat is fixedly connected with one end of the support plate, and the other end of the support plate is in friction contact with the inner wall of the outer shell.

As a preferred mode, the contact end of the supporting plate abutting against the shell is an arc-shaped surface structure, and the arc-shaped surface structure is in line contact with the inner wall of the shell.

Preferably, the contact end of the support plate against the housing is a spherical surface structure, and the spherical surface structure is in point contact with the inner wall of the housing.

As a preferable mode, the mounting seat is two U-shaped grooves arranged at intervals, the supporting plate is in an arch bridge shape, and two supporting legs of the arch bridge shaped supporting plate are clamped into the two U-shaped grooves.

As a preferred mode, the bottom support structure comprises a support column vertically arranged in the center of the bottom of the shell and a sleeve vertically arranged in the center of the bottom end of the inner container and matched with the support column, and the support column extends into the sleeve and abuts against the bottom surface of the sleeve.

As a preferred mode, the sleeve outside is equipped with the support that is used for propping up the freezing tray that deposits, and the support top is equipped with the bearing, and bearing inner race and the pivot fixed connection of locating the freezing tray bottom.

Preferably, the inner container and the outer shell are connected at one side of the upper end thereof by an anti-rotation pin.

Compared with the prior art, the invention has the beneficial effects that:

(1) the neck part is of a multilayer structure, and the multilayer structure can effectively prolong an effective heat conduction path between the inner container and the outer shell at the neck part, reduce the cold leakage quantity at the neck part, improve the utilization rate of liquid nitrogen and the period of maintaining a temperature field by the liquid nitrogen, and simultaneously can prevent the outer shell from water and frost under the use condition of the container.

(2) The inner container and the outer container are ensured to be coaxially arranged after being assembled through the bottom supporting structure and the lateral supporting structure, the supporting shaft is in friction contact with the sleeve, and the supporting plate is not fixedly connected with the outer container, so that the inner container can slide when being shrunk at low temperature, and low-temperature stress is released. In addition, the bottom supporting structure and the lateral supporting structure can reduce the stress concentration of the neck opening caused by eccentric moment of the neck opening component under the working condition by ensuring the coaxiality of the inner container and the outer shell, and ensure the safety of the liquid nitrogen biological container structure.

(3) The lateral support structure of the invention reduces the heat conduction area between the support plate and the shell through the line contact or point contact of the support plate and the inner wall of the shell, increases the contact thermal resistance, and can effectively reduce the heat conduction quantity of the heat insulation support structure, thereby reducing the cold leakage quantity generated by the inner container through the support plate while maintaining the coaxiality of the shell and the inner container by utilizing the lateral support structure.

Drawings

FIG. 1 is a schematic structural diagram of a liquid nitrogen biocontainer.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is an enlarged view of a portion b of fig. 1.

Fig. 4 is an enlarged view of a portion c of fig. 1.

Fig. 5 is an enlarged view of a portion d of fig. 1.

Fig. 6 is a schematic view of a multi-layer structure of the neck finish.

FIG. 7 is a schematic view of the assembly of the lateral support structure with the liquid nitrogen biocontainer.

Fig. 8 is a schematic structural view of the support plate.

Fig. 9 is a front view of fig. 8.

Fig. 10 is a schematic view of the inner container and outer shell.

Fig. 11 is a schematic structural diagram of an upper end socket of an inner container.

Fig. 12 is a front view of fig. 11.

Fig. 13 is a schematic structural view of the upper end socket of the shell.

Fig. 14 is a front view of fig. 13.

The device comprises a neck part 1, a first neck pipe 101, a fifth neck pipe 102, a third neck pipe 103, a second neck pipe 104, a second annular notch 105, a fourth neck pipe 106, a first annular notch 107, a hoisting pipe 2, a lateral supporting structure 3, a 301 mounting seat, a 302 supporting plate, a 303 contact end, 304 supporting legs, a 4 outer shell, a 5 vacuum interlayer, a 6 inner container, a 7 freezing tray, an 8 bottom supporting structure, a 801 supporting column, an 802 sleeve, a 9 anti-rotation pin, a 10 rotating shaft, an 11 bearing, a 12 support, a 13 upper end socket, 14 reinforcing ribs, 1401 annular reinforcing ribs, 1402 radial reinforcing ribs, 1403 perforated reinforcing ribs, a 15 cylinder, a 16 lower end socket, a 17 concentric sleeve and 18 through holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.