CN212068794U

CN212068794U - Liquid nitrogen adding device

Info

Publication number: CN212068794U
Application number: CN202020188421.2U
Authority: CN
Inventors: 陈素; 彭向杰; 彭建军; 朱文兵
Original assignee: Reproductive and Genetic Hospital of CITIC Xiangya Co Ltd
Current assignee: Reproductive and Genetic Hospital of CITIC Xiangya Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-12-04
Anticipated expiration: 2030-02-20

Abstract

The utility model relates to a liquid nitrogen adds device, in the less opening of liquid nitrogen container can be stretched into to long and thin honeycomb duct, pours the liquid nitrogen into from the filter mantle, alright through conical hopper, finally by the leading-in liquid nitrogen container of honeycomb duct. The honeycomb duct stretches into the inside of the liquid nitrogen tank, and liquid nitrogen leakage can be effectively avoided. And when the liquid nitrogen flows into the flow guide cover from the filter cavity, the liquid nitrogen needs to pass through the filter screen, so that impurities in the liquid nitrogen can be separated and cannot enter the liquid nitrogen tank. Once more impurities are attached to the filter screen, the filter cover can be drawn out from the guide cover, and the impurities on the filter screen can be poured out. At the moment, the relative position of the air guide sleeve and the liquid nitrogen tank does not need to be changed, so that liquid nitrogen leakage is further avoided. Therefore, the liquid nitrogen adding device enables the adding operation of the liquid nitrogen to be more convenient.

Description

Liquid nitrogen adding device

Technical Field

The utility model relates to a biology experiment technical field especially relates to a liquid nitrogen adds device.

Background

Liquid nitrogen, a commonly used refrigerant, is widely used in industrial manufacturing and biological experiments, particularly in IVF (in vitro fertilization) laboratories, for freezing cells. In order to maintain a suitable temperature, liquid nitrogen needs to be added frequently.

During repeated additions of liquid nitrogen, impurities (e.g., dust, metal chips, sheared frozen stems, detached foam sludge, etc.) accumulate and can cause unknown toxicity to embryos, gametes, etc. stored therein. Therefore, in the process of adding liquid nitrogen, leakage is avoided, and impurities are removed in time. And in order to reduce the volatilization of liquid nitrogen, the opening of the liquid nitrogen tank is generally small, thereby causing inconvenience in operation.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a liquid nitrogen adding device which facilitates the addition of liquid nitrogen, in order to solve the problem that the liquid nitrogen adding operation is inconvenient.

A liquid nitrogen addition device comprising:

the filter cover is of a hollow structure with openings at two ends, and is provided with a filter cavity connected with the openings at two ends;

the filter screen is arranged in the filter cavity, and the filter cavity is divided into two parts by the filter screen in the connecting line direction of the openings at the two ends of the filter cover; and

the air guide sleeve comprises a conical funnel and an air guide pipe communicated with the outlet of the conical funnel, and the conical funnel is sleeved with one end of the filter sleeve.

In one embodiment, the filter housing and the air guide housing are any one of a stainless steel member, an aluminum alloy member, a foam member and a polystyrene member.

In one embodiment, the filter screen is a metal filter screen.

In one embodiment, the filter cover comprises a cylindrical accommodating part and a conical connecting part, and the connecting part is sleeved with the conical funnel.

In one embodiment, the filter screen is disposed at a joint of the accommodating portion and the connecting portion.

In one embodiment, the height of the receiving portion is greater than the height of the connecting portion.

In one embodiment, the junction of the draft tube and the conical funnel forms a right-angle structure.

In one embodiment, the draft tube is a cylindrical hollow tubular structure.

In one embodiment, the number of the air guide sleeves is multiple, the air guide sleeves are sequentially sleeved, and the pipe diameters of the flow guide pipes of the air guide sleeves are sequentially increased from inside to outside.

In one embodiment, the draft tube comprises a plurality of guide sections, and the pipe diameters of the plurality of guide sections increase and decrease in sequence in the direction extending from one end of the draft tube close to the conical funnel to the other end of the draft tube.

According to the liquid nitrogen adding device, the slender guide pipe can extend into the smaller opening of the liquid nitrogen tank, liquid nitrogen is poured into the liquid nitrogen adding device from the filter cover and can be guided into the liquid nitrogen tank through the conical funnel and finally through the guide pipe. The honeycomb duct stretches into the inside of the liquid nitrogen tank, and liquid nitrogen leakage can be effectively avoided. And when the liquid nitrogen flows into the flow guide cover from the filter cavity, the liquid nitrogen needs to pass through the filter screen, so that impurities in the liquid nitrogen can be separated and cannot enter the liquid nitrogen tank. Once more impurities are attached to the filter screen, the filter cover can be drawn out from the guide cover, and the impurities on the filter screen can be poured out. At the moment, the relative position of the air guide sleeve and the liquid nitrogen tank does not need to be changed, so that liquid nitrogen leakage is further avoided. Therefore, the liquid nitrogen adding device enables the adding operation of the liquid nitrogen to be more convenient.

Drawings

FIG. 1 is a schematic structural diagram of a liquid nitrogen adding device according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural diagram of a liquid nitrogen adding device in another embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a liquid nitrogen adding apparatus 100 according to a preferred embodiment of the present invention includes a filter housing 110, a filter screen 120, and a guide housing 130.

The filter housing 110 is a hollow structure with two open ends, and the filter housing 110 has a filter cavity (not shown) connecting the two open ends. When liquid nitrogen is added, it can be poured in through one opening and flow out through the other opening. The filter housing 110 may be integrally formed or may be made of several parts that are joined together or welded together. Wherein, the filter cover 110 can be any one of stainless steel component, aluminum alloy component, foam component and polystyrene component

The filter screen 120 is installed in the filter chamber, and the filter chamber is divided into two parts by the filter screen 120 in the direction of the connecting line of the openings at the two ends of the filter housing 110. Therefore, the liquid nitrogen entering the filter housing 110 flows from one opening to the other opening, and passes through the filter mesh 120, thereby filtering out impurities. The filter screen 120 can be installed by welding or clamping, and can be 16 mesh (aperture 1mm), 18 mesh (aperture 0.88mm) or 20 mesh (aperture 0.83mm) filter screens.

In order to prolong the service life of the filter screen 120, in this embodiment, the filter screen 120 is a metal filter screen.

The pod 130 includes a conical funnel 131 and a delivery tube 133 in communication with an outlet of the conical funnel 131. In general, the duct 133 and the conical funnel 131 are integrally formed. Like the filter sock 110, the air guide sock 130 may be any one of a stainless steel member, an aluminum alloy member, a foam member, and a polystyrene member.

The draft tube 133 is generally an elongated hollow tubular structure that extends into the interior of the liquid nitrogen tank. In the present embodiment, the duct 133 is a cylindrical hollow tubular structure. Therefore, the outer wall surface of the draft tube 133 is smooth, and rubbing with the inner wall of the opening of the liquid nitrogen tank can be effectively avoided.

In the present embodiment, the connection between the duct 133 and the conical funnel 131 forms a right-angle structure. Therefore, when the guide pipe 133 extends into the liquid nitrogen tank, the bottom of the conical funnel 131 can form a stable bearing with the open end of the liquid nitrogen tank. Meanwhile, the bottom of the conical funnel 131 can cover the opening edge of the liquid nitrogen tank, so that the volatilization of the liquid nitrogen is obviously reduced.

Further, the conical funnel 131 is sleeved with one end of the filter housing 110. Specifically, one end of the filter housing 110 is received in the conical funnel 131. Therefore, the filtered liquid nitrogen enters the flow guide sleeve 130 from the filter sleeve 110 and is finally added into the liquid nitrogen tank through the flow guide pipe 133, so that the leakage of the liquid nitrogen in the adding process can be effectively avoided. In addition, when the filter screen 120 has a large amount of impurities, the filter cap 110 may be drawn out from the guide cap 130 to pour out the impurities on the filter screen 120. At this time, the relative position of the dome 130 and the liquid nitrogen tank does not need to be changed, thereby also preventing leakage of liquid nitrogen during removal of impurities.

In the present embodiment, the filter cover 110 includes a receiving portion 111 and a connecting portion 113. The accommodating portion 111 is cylindrical, the connecting portion 113 is conical, and the connecting portion 113 is sleeved with the tapered funnel 131.

The accommodating portion 111 and the connecting portion 113 may be integrally formed or may be formed by welding, and in particular, in the embodiment, the filter screen 120 is disposed at a joint of the accommodating portion 111 and the connecting portion 113. The accommodating portion 111 may serve to temporarily accommodate liquid nitrogen, and may prevent liquid nitrogen from overflowing when it is poured. And the connection portion 113 is similar to the surface profile of the cone-shaped funnel 131. Therefore, the filter housing 110 can be tightly fitted with the air guide housing 130 by the coupling portion 113 being fitted with the tapered funnel 131.

Further, in the present embodiment, the height of the accommodating portion 111 is greater than the height of the connecting portion 113. The height refers to the dimension of the accommodating portion 111 and the connecting portion 113 in the direction connecting the openings of the two ends of the filter cover 110. The larger the height of the accommodating portion 111, the stronger the temporary storage capacity, and thereby the overflow of liquid nitrogen can be further prevented.

In this embodiment, there are a plurality of air guiding covers 130, the air guiding covers 130 are sequentially sleeved, and the pipe diameters of the air guiding pipes 133 of the air guiding covers 130 sequentially increase from inside to outside.

The calibers of common liquid nitrogen tanks in the market are different in type. The flow pipe 133 with a larger pipe diameter can be inserted into the liquid nitrogen tank with a larger opening size; otherwise, a liquid nitrogen tank with a smaller opening size can be inserted. Therefore, the diversion cover 130 with the pipe diameter matched with that of the diversion pipe 133 can be taken out according to different liquid nitrogen tanks. Thus, the application range of the liquid nitrogen adding apparatus 100 can be increased, and the space can be saved.

As shown in fig. 1, the number of the fairings 130 is 3, so that the pipe diameters of the three draft pipes 133 are 3.5cm, 9cm and 19cm, respectively, inward and outward.

It should be noted that other ways may be used to expand the applicability of the liquid nitrogen adding apparatus 100. For example, as shown in FIG. 2:

in another embodiment, the draft tube 133 includes a plurality of draft sections 1332, and the diameters of the plurality of draft sections 1332 increase and decrease in sequence in a direction extending from one end of the draft tube 133 near the conical funnel 131 to the other end.

Specifically, the closer to the conical funnel 131, the larger the pipe diameter of the guide section 1332, and the farther from the conical funnel 131, the smaller the pipe diameter of the guide section 1332. Therefore, for the liquid nitrogen tank with a larger opening size, the draft tube 133 can extend into the opening of the liquid nitrogen tank, and for the liquid nitrogen tank with a smaller opening size, the draft tube 133 can also extend into the opening of the liquid nitrogen tank through the draft section 1332 with the same pipe diameter. Therefore, the liquid nitrogen adding device 100 in this embodiment can still be applied to liquid nitrogen tanks of various models.

In the liquid nitrogen adding apparatus 100, the elongated guide tube 133 can be inserted into the smaller opening of the liquid nitrogen tank, and the liquid nitrogen can be poured from the filter mantle 110, and then can be guided into the liquid nitrogen tank through the conical funnel 131 and finally through the guide tube 133. The draft tube 133 extends into the liquid nitrogen tank to effectively prevent the liquid nitrogen from leaking. Furthermore, the liquid nitrogen flows from the filter chamber into the pod 130 through the screen 120, so that impurities in the liquid nitrogen can be separated without entering the liquid nitrogen tank. Once the filter screen 120 has a large amount of impurities, the filter housing 110 may be drawn out of the pod 130 and the impurities on the filter screen 120 may be discharged. At this time, the relative position of the pod 130 and the liquid nitrogen tank does not need to be changed, thereby further preventing leakage of liquid nitrogen. Therefore, the liquid nitrogen adding device 100 makes the liquid nitrogen adding operation more convenient.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A liquid nitrogen adding device, characterized by comprising:

2. The liquid nitrogen adding device according to claim 1, wherein the filter housing and the air guide housing are made of any one of a stainless steel member, an aluminum alloy member, a foam member and a polystyrene member.

3. The liquid nitrogen adding device according to claim 1, wherein the filter screen is a metal filter screen.

4. The liquid nitrogen adding device according to claim 1, wherein the filter cover comprises a cylindrical accommodating portion and a conical connecting portion, and the connecting portion is sleeved with the conical funnel.

5. The liquid nitrogen adding device according to claim 4, wherein the filter screen is provided at a joint of the accommodating portion and the connecting portion.

6. The liquid nitrogen adding apparatus according to claim 4, wherein a height of the accommodating portion is larger than a height of the connecting portion.

7. The liquid nitrogen adding device according to claim 1, wherein a junction of the draft tube and the conical funnel forms a right-angle structure.

8. The liquid nitrogen adding device according to claim 1, wherein the flow guide tube is a cylindrical hollow tubular structure.

9. The liquid nitrogen adding device according to any one of claims 1 to 8, wherein the number of the air guide sleeves is plural, the plural air guide sleeves are sequentially sleeved, and the pipe diameters of the flow guide pipes of the plural air guide sleeves are sequentially increased from inside to outside.

10. The liquid nitrogen adding device according to any one of claims 1 to 8, wherein the flow guide tube comprises a plurality of flow guide sections, and the tube diameters of the plurality of flow guide sections increase and decrease in sequence in a direction extending from one end of the flow guide tube close to the conical hopper to the other end.