CN219390176U

CN219390176U - Liquid nitrogen refrigerating device convenient for storing and taking samples

Info

Publication number: CN219390176U
Application number: CN202320620986.7U
Authority: CN
Inventors: 王运超; 何流畅; 朱航航; 高育源; 陈亚斌
Original assignee: Zhengzhou University
Current assignee: Zhengzhou University
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-07-21
Anticipated expiration: 2033-03-27

Abstract

A liquid nitrogen refrigerating device convenient for storing and taking samples comprises a liquid nitrogen storage tank and a sample storage cylinder, wherein an air pressure communication hole and a liquid adding opening for adding liquid nitrogen are formed in the upper part of the liquid nitrogen storage tank, and a plug is arranged at the liquid adding opening; the lower part of the specimen storage cylinder is communicated with the lower part of the liquid nitrogen storage tank through a communicating pipe; a cylinder cover is arranged at the cylinder opening of the specimen storage cylinder, and an inner cylinder body is arranged in the specimen storage cylinder; in summary, the utility model can lift the specimen box to the opening of the specimen storage cylinder through the electric winch and the pulley, and then can take out the specimen in the specimen box, the process does not need to lift the specimen box to be placed on the ground, and the whole process is fast in operation, thereby avoiding other specimens of the specimen box from thawing; in addition, the specimen box is not directly contacted with liquid nitrogen, so that the specimen is prevented from being directly soaked by the liquid nitrogen, and the whole structure is reasonable in design, convenient to use and good in effect.

Description

Liquid nitrogen refrigerating device convenient for storing and taking samples

Technical Field

The utility model relates to a liquid nitrogen refrigerating device convenient for storing and taking samples.

Background

The temperature of liquid nitrogen at normal pressure is-196 ℃, and at such low temperatures the metabolic activity of tissue cells is substantially stopped, so that liquid nitrogen is used to preserve biological tissue samples in basic experimental studies. The types of liquid nitrogen tanks used at present are more, the specimen box is usually put into the liquid nitrogen tank for preservation, but the specimen is inconvenient to store and take when the liquid nitrogen tank is used for preservation, the liquid nitrogen tank is mostly preserved by liquid phase freezing, and liquid nitrogen possibly enters into the tube through a freezing tube orifice and is directly soaked in the liquid nitrogen, so that the risk of damaging and denaturing the sample is increased; and it is often necessary to completely lift the rack holding the cartridge off of the floor and then re-fetch the cartridge during specimen retrieval, which causes repeated freeze thawing of the specimen and increases the risk of denaturation damage to the specimen.

Disclosure of Invention

The utility model aims to provide a liquid nitrogen refrigerating device convenient for storing and taking samples, which solves the technical problems that the storage and taking are inconvenient when a liquid nitrogen tank is used for storing biological tissue samples and the sample box is required to be completely taken out to cause repeated freezing and thawing of the samples in the prior art.

In order to solve the technical problems, the utility model adopts the following technical scheme: a liquid nitrogen refrigerating device convenient for storing and taking samples comprises a liquid nitrogen storage tank and a sample storage cylinder, wherein an air pressure communication hole and a liquid adding opening for adding liquid nitrogen are formed in the upper part of the liquid nitrogen storage tank, and a plug is arranged at the liquid adding opening;

the lower part of the specimen storage cylinder is communicated with the lower part of the liquid nitrogen storage tank through a communicating pipe;

the tube mouth of the specimen storage tube is provided with a tube cover, an inner tube body is arranged in the specimen storage tube, and a space is arranged between the outer wall of the inner tube body and the inner wall of the specimen storage tube and is used for storing liquid nitrogen; a specimen box frame is arranged in the inner cylinder body, a plurality of specimen boxes are arranged on the specimen box frame, and a hanging ring is arranged at the top of the specimen box frame;

the electric capstan is installed at the top of liquid nitrogen storage tank, and electric capstan's upper surface vertical fixation has the bracing piece, and the tip of bracing piece is fixed with the mounting disc, and the mounting disc is located the sample storage tube directly over, and the bottom surface of mounting disc is provided with the pulley, the pulley is walked around to electric capstan's rope tip is provided with the couple.

Preferably, the top of the inner cylinder body is provided with a baffle ring, the baffle ring is supported and placed at the cylinder mouth of the specimen storage cylinder, and two handles are arranged on the baffle ring.

Preferably, six storage grooves are formed in the inner bottom surface of the inner cylinder, one storage groove is located in the center of the bottom surface of the inner cylinder, the other five storage grooves are arranged in an annular array around the center of the bottom surface of the inner cylinder, and each storage groove is internally provided with a specimen box rack;

the bottom surface of the mounting plate is provided with a track, the track consists of an annular part and a linear part, the linear part is arranged on the inner side of the annular part along the radial direction, the end part of the linear part is positioned at the circle center of the annular part, the annular part is positioned right above the five storage grooves, and the circle center of the annular part is positioned right above the bottom surface center of the inner cylinder body;

the track has the spout, and the cross section of spout is the major arc formula, is provided with movable spheroid in the spout of track, and movable spheroid is fixed with the double-screw bolt, and the double-screw bolt outwards stretches out from the spout, and threaded connection has the nut on the double-screw bolt, and the nut is inconsistent with the track, the tip at the double-screw bolt is installed to the pulley.

Preferably, the bottom of the specimen box frame is provided with an iron sheet, a magnet is adsorbed on the iron sheet, and the magnet is connected with the bottom of the storage groove through a stay wire;

when the specimen box frame is lifted to the tube mouth of the specimen storage tube, the pull wire is in a tight state.

Preferably, the liquid nitrogen refrigerating device convenient for storing and taking samples further comprises an air extracting device, and the air extracting device is connected with the upper inner cavity of the sample storage cylinder through an air extracting pipe.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the electric winch and the pulley can be used for lifting the specimen box to the barrel opening of the specimen storage barrel, and then the specimen in the specimen box can be taken out, so that the whole process is fast to operate without lifting the specimen box to be placed on the ground, and other specimens of the specimen box are prevented from being thawed; in addition, the specimen box is not directly contacted with liquid nitrogen, so that the specimen is prevented from being directly soaked by the liquid nitrogen, and the whole structure is reasonable in design, convenient to use and good in effect.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of a liquid nitrogen refrigerator for facilitating sample access according to the present utility model;

FIG. 2 is a schematic view of the structure of the inner cylinder;

FIG. 3 is a block diagram of a cartridge holder;

FIG. 4 is an inner bottom view of the inner barrel;

FIG. 5 is a bottom view of the mounting plate;

fig. 6 is a schematic view of a pulley mounted on a rail.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The present utility model is described in further detail below with reference to examples.

As shown in fig. 1 to 6, a specific embodiment 1 of a liquid nitrogen refrigerating device for conveniently accessing samples provided by the present utility model:

the liquid nitrogen refrigerating device convenient for storing and taking samples comprises a liquid nitrogen storage tank 1 and a sample storage cylinder 2, wherein an air pressure communication hole 3 and a liquid adding opening 4 for adding liquid nitrogen are arranged at the upper part of the liquid nitrogen storage tank 1, a plug is arranged at the liquid adding opening 4, and liquid nitrogen can be supplemented into the liquid nitrogen storage tank 1 by opening the plug;

the lower part of the specimen storage cylinder 2 is communicated with the lower part of the liquid nitrogen storage tank 1 through a communicating pipe 5;

the sample storage barrel 2 is provided with a barrel cover at the barrel opening, an inner barrel 6 is arranged in the sample storage barrel 2, a baffle ring 7 is arranged at the top of the inner barrel 6, the baffle ring 7 supports the barrel opening placed in the sample storage barrel 2, two handles 8 are arranged on the baffle ring 7, and the inner barrel 6 can be lifted out of the sample storage barrel 2 by lifting the two handles 8;

a space is arranged between the outer wall of the inner cylinder 6 and the inner wall of the specimen storage cylinder 2, the space is used for storing liquid nitrogen, and the liquid nitrogen level in the space is equal to the liquid nitrogen level in the liquid nitrogen storage tank 1 due to the arrangement of the communicating pipe 5; a specimen box frame 9 is arranged in the inner cylinder 6, a plurality of specimen boxes 10 are arranged on the specimen box frame 9, and a hanging ring 11 is arranged at the top of the specimen box frame 9;

a small-sized electric winch 12 is installed at the top of the liquid nitrogen storage tank 1, a supporting rod 13 is vertically fixed on the upper surface of the electric winch 12, a mounting plate 14 is fixed at the end part of the supporting rod 13, the mounting plate 14 is located right above the specimen storage barrel 2, a pulley 15 is arranged on the bottom surface of the mounting plate 14, a rope 16 of the electric winch 12 bypasses the pulley 15, and a hook 17 is arranged at the end part of the rope 16 of the electric winch 12.

When the sample needs to be taken out, the hanging ring 11 can be hung by the hanging hook 17, the electric winch 12 is started, the rope 16 of the electric winch 12 bypasses the pulley 15, the sample box 10 can be lifted to the opening of the sample storage barrel 2, then the sample in the sample box 10 can be taken out, the sample box 10 does not need to be lifted and placed on the ground in the process, the whole process is fast to operate, and accordingly other samples of the sample box 10 are prevented from being thawed.

The embodiment 2 of the liquid nitrogen refrigerating device convenient for accessing samples provided by the utility model comprises the following components:

the difference from the specific embodiment 1 is that the inner cylinder 6 can hold a plurality of specimen box frames 9, specifically, six storage grooves 18 are provided on the inner bottom surface of the inner cylinder 6, one storage groove 18 is located at the bottom center of the inner cylinder 6, the other five storage grooves 18 are arranged in an annular array around the bottom center of the inner cylinder 6, and each storage groove 18 is internally provided with a specimen box frame 9;

in addition, since the six cartridge holders 9 are placed in different storage grooves 18 on the bottom surface of the inner cylinder 6, when the cartridge holders 9 are pulled upward by using the ropes 16, the cartridge holders 9 are inclined to cause displacement or escape of the specimen, so in order to solve the problem, a rail 19 is provided on the bottom surface of the mounting plate 14, the rail 19 is composed of an annular portion 20 and a linear portion 21, the linear portion 21 is provided inside the annular portion 20 in the radial direction, the end of the linear portion 21 is located at the center of the annular portion 20, and the annular portion 20 is located directly above the five storage grooves 18, and the center of the annular portion 20 is located directly above the center of the bottom surface of the inner cylinder 6;

the track 19 is provided with a chute 22, the cross section of the chute 22 is a major arc, a movable ball 23 is arranged in the chute 22 of the track 19, a stud 24 is fixed on the movable ball 23, the stud 24 extends outwards from the chute 22, a nut 25 is connected to the stud 24 in a threaded manner, the nut 25 is in contact with the track 19, and the pulley 15 is arranged at the end part of the stud 24.

The pulley 15 is arranged on the track 19, and the position of the pulley 15 on the bottom surface of the mounting disc 14 can be changed through the cooperation of the movable ball 23 and the sliding groove 22, so that the pulley 15 is positioned right above the specimen box frame 9 to be pulled out, and the pulling in the vertical direction is ensured; specifically, the pulley 15 is moved on the annular part 20 of the track 19 so as to be positioned right above the specimen box frame 9 to be pulled out, then the nut 25 is screwed, the nut 25 is in contact with the track 19 to prevent the pulley 15 from moving, and then the electric winch 12 can be started to take out the specimen box frame 9; if the cartridge holder 9 at the center of the bottom surface of the inner cylinder 6 is to be taken out, the pulley 15 can be slid to the end of the linear portion 21 of the rail 19, and the pulley 15 is positioned right above the center of the bottom surface of the inner cylinder 6 at this time, so that the subsequent operation can be performed.

The utility model provides a concrete embodiment 3 of a liquid nitrogen refrigerating device convenient for accessing samples, which comprises the following steps:

the difference from embodiment 2 is that when the cartridge holder 9 is lifted up to the opening of the cartridge 2, the cartridge 10 can be taken out, because the cartridge holder 9 is in a hanging state at this time, when the cartridge 10 is taken out, the cartridge holder 9 can shake, in order to reduce the shake, an iron sheet 26 is provided at the bottom of the cartridge holder 9, a magnet is adsorbed on the iron sheet 26, the magnet is connected to the bottom of the storage tank 18 through a pull wire, and when the cartridge holder 9 is lifted up to the opening of the cartridge 2, the pull wire is in a tight state, the cartridge holder 9 can be effectively prevented from shaking due to the pulling action of the pull wire, both the pull wire and the magnet are conventional techniques, and are shown in the drawings.

The utility model provides a concrete embodiment 4 of a liquid nitrogen refrigerating device convenient for accessing samples, which comprises the following steps:

the difference from embodiment 1 is that when the cap is opened, since a large amount of mist is generated by liquid nitrogen, it is inconvenient to observe the cartridge 10 and the inner cylinder 6 etc. inside, and therefore, the air extractor 27 is provided on the liquid nitrogen storage tank 1, the air extractor 27 is connected with the upper inner cavity of the specimen storage cylinder 2 through the air extractor 28, and the mist is sucked by the air extractor 27, thereby facilitating clear observation of the inside condition of the specimen storage cylinder 2.

It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A liquid nitrogen refrigeration device convenient for storing and taking samples, which is characterized in that: the liquid nitrogen storage device comprises a liquid nitrogen storage tank and a sample storage cylinder, wherein the upper part of the liquid nitrogen storage tank is provided with an air pressure communication hole and a liquid adding opening for adding liquid nitrogen, and the liquid adding opening is provided with a plug;

2. A liquid nitrogen refrigerator for facilitating access to samples as recited in claim 1, wherein: the top of interior barrel is provided with the baffle ring, the baffle ring supports the nozzle of placing at sample storage cylinder, is provided with two handles on the baffle ring.

3. A liquid nitrogen refrigerator for facilitating access to samples as recited in claim 1, wherein: six storage grooves are formed in the inner bottom surface of the inner cylinder body, one storage groove is located in the center of the bottom surface of the inner cylinder body, the other five storage grooves are arranged in an annular array around the center of the bottom surface of the inner cylinder body, and each storage groove is internally provided with a specimen box frame;

4. A liquid nitrogen refrigerator for facilitating access to samples as recited in claim 3, wherein: the bottom of the specimen box frame is provided with an iron sheet, a magnet is adsorbed on the iron sheet, and the magnet is connected with the bottom of the storage groove through a stay wire;

5. The liquid nitrogen refrigerator for easy access to samples according to any one of claims 1 to 4, wherein: the device also comprises an air extractor which is connected with the upper inner cavity of the specimen storage cylinder through an air extracting pipe.