Liquid nitrogen tank convenient for storing and taking samples

Abstract

The liquid nitrogen tank comprises a shell, an inner container is arranged in the shell, a tank opening is fixed in the middle of the top end face of the shell, a lock cover is installed on the surface of the tank opening, a neck tube is fixed between the top of the inner container and the tank opening, a plurality of lifting barrels are arranged in the inner container, and a plurality of clamping grooves are formed in the lifting barrels. A limiting pull rod is installed on the surface of one side of each lifting barrel, a cover plug is installed in the tank opening in a clamped mode, limiting clamping grooves for clamping one ends of the limiting pull rods are formed in the top end face of the tank opening at equal angles, and strip-shaped grooves for limiting clamping of the limiting pull rods are formed in the surface of the side edge of the cover plug at equal angles. A functional assembly is arranged on the top end surface of the cover plug; and through the designed functional assembly, a worker can conveniently pull out the cover plug from the interior of the tank opening in the later period, the output force of the worker during operation can be reduced, operation is convenient and fast, the operation efficiency of the worker is conveniently improved, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen tanks, in particular to a liquid nitrogen tank convenient for storing and retrieving samples. Background Technique

[0002] Liquid nitrogen tanks can generally be divided into two types: liquid nitrogen storage tanks and liquid nitrogen transportation tanks. The storage tanks are mainly used for static storage of liquid nitrogen indoors and are not suitable for long-distance transportation in the working state. In order to meet the transportation conditions, the liquid nitrogen transportation tanks are specially designed for shock absorption. In addition to static storage, they can also be used for transportation when filled with liquid nitrogen, but violent collisions and vibrations should also be avoided. When the existing liquid nitrogen tanks are in use, the plug is tightly clamped inside the neck tube through the tank mouth. When workers need to store and retrieve samples inside the liquid nitrogen tank later, it is inconvenient for workers to quickly pull out the plug, which will affect the operation efficiency of workers and there are inconveniences in use, and there is a certain room for improvement. Content of the Utility Model

[0003] The purpose of the utility model is to provide a liquid nitrogen tank convenient for storing and retrieving samples, so as to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A liquid nitrogen tank convenient for storing and retrieving samples, including a housing, an inner tank is arranged inside the housing, a tank mouth is fixed in the middle of the top surface of the housing, a lock cover is installed on the surface of the tank mouth, a neck tube is fixed between the top of the inner tank and the tank mouth, a plurality of lifting cylinders are arranged inside the inner tank, a limiting pull rod is installed on one side surface of each lifting cylinder, a plug is clamped and installed inside the tank mouth, limiting card slots for clamping one end of the limiting pull rod are equiangularly opened on the top surface of the tank mouth, strip-shaped slots for limiting and clamping the limiting pull rod are equiangularly opened on the side surface of the plug, and a functional component is arranged on the top surface of the plug.

[0005] The functional component includes limiting plates symmetrically arranged on the top surface of the plug. Installation slots for installing the limiting plates are symmetrically opened at the bottom end of the side of the top of the plug. One side inside the installation slot is fixed with a telescopic spring, and one end of the telescopic spring abuts against the inner surface of one end of the limiting plate. A through slot for the other end of the limiting plate to penetrate is opened on the inner top surface of the installation slot. A fixing plate is fixed on the adjacent surface of the opening of the through slot. The top surface of the fixing plate abuts against the inner surface of the other end of the limiting plate. A connection card slot for clamping one end of the limiting plate is opened at the bottom of one side inner wall of the installation slot.

[0006] As a further preferred of this technical solution, a limiting partition is installed inside the installation slot, and one side surface of the limiting partition is attached to the surface of the limiting plate.

[0007] As a further preference of the present technical solution, limiting convex plates are symmetrically fixed on the side surface of one end of the limiting plate, and wall grooves for engaging the limiting convex plates are symmetrically formed in the connecting card slots.

[0008] As a further preference of the present technical solution, a plurality of heat insulators are filled between the interior of the outer shell and the exterior of the inner container, and a handle is installed on the top surface of the outer shell.

[0009] As a further preference of the present technical solution, a limiting assembly is arranged inside the limiting card slot. The limiting assembly includes rubber strips symmetrically arranged at the opening of the limiting card slot. A double-sided adhesive is arranged on the inner surface of the rubber strip, and the surface of the double-sided adhesive is adhesively connected to the inner wall of the opening of the limiting card slot. Limiting magnetic rings are symmetrically fixed between the two rubber strips. Both ends of the limiting magnetic ring are fixedly connected to the surface of the rubber strip, and the longitudinal section of the limiting magnetic ring is arc-shaped.

[0010] As a further preference of the present technical solution, fixing grooves are equidistantly formed on the inner wall of the strip-shaped groove, and balls are installed inside the fixing grooves. The surface of the balls is in rolling fit with the surface of the limiting pull rod.

[0011] The utility model provides a liquid nitrogen tank convenient for accessing samples, having the following beneficial effects:

[0012] 1. Through the designed functional components, the utility model facilitates the later workers to pull out the plug from the inside of the tank opening, can reduce the output force during the operation of the workers, is convenient and fast to operate, is conducive to improving the operation efficiency of the workers, and has good practicability.

[0013] 2. Through the designed limiting assembly, the utility model facilitates further improving the limiting effect on the limiting pull rod, enables one end of the limiting pull rod to be limited and engaged at the tank opening, and at the same time, the lifting cylinder at the other end of the limiting pull rod is not prone to shaking, and has good practical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the utility model;

[0015] Figure 2 is the front view sectional structural schematic diagram of the utility model;

[0016] Figure 3 is Figure 2 the enlarged schematic diagram of area A in

[0017] Figure 4 is Figure 2 the enlarged schematic diagram of area B in

[0018] In the figure: 1. Outer shell; 2. Tank opening; 3. Locking cover; 4. Handle; 5. Inner tank; 6. Neck tube; 7. Plug; 8. Lifting cylinder; 9. Limit pull rod; 10. Limit plate; 11. Installation groove; 12. Telescopic spring; 13. Connection card slot; 14. Limit convex plate; 15. Through groove; 16. Fixed plate; 17. Limit partition; 18. Limit card slot; 19. Strip-shaped groove; 20. Limit magnetic ring; 21. Rubber strip; 22. Double-sided tape; 23. Fixed groove; 24. Ball. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] The present invention provides a technical solution: As Figure 1 . Figure 2 And Figure 3 shown, in this embodiment, a liquid nitrogen tank for facilitating the access of samples includes an outer shell 1. An inner tank 5 is arranged inside the outer shell 1. A tank opening 2 is fixed in the middle of the top surface of the outer shell 1. A locking cover 3 is installed on the surface of the tank opening 2. A neck tube 6 is fixed between the top of the inner tank 5 and the tank opening 2. A plurality of lifting cylinders 8 are arranged inside the inner tank 5. A limit pull rod 9 is installed on the side surface of each lifting cylinder 8. A plug 7 is snap-fitted inside the tank opening 2. Limit card slots 18 for the end of the limit pull rod 9 to snap into are equiangularly opened on the top surface of the tank opening 2. Strip-shaped grooves 19 for the limit pull rod 9 to be limit snap-fitted into are equiangularly opened on the side surface of the plug 7. A plurality of layers of heat insulators are filled between the inside of the outer shell 1 and the outside of the inner tank 5. A handle 4 is installed on the top surface of the outer shell 1. A functional component is arranged on the top surface of the plug 7. The functional component includes limit plates 10 symmetrically arranged on the top surface of the plug 7. Installation grooves 11 for installing the limit plates 10 are symmetrically opened at the bottom of the top side of the plug 7. One side inside the installation groove 11 is fixed with a telescopic spring 12. One end of the telescopic spring 12 abuts against the inner surface of one end of the limit plate 10. A through groove 15 for the other end of the limit plate 10 to penetrate through is opened on the inner top surface of the installation groove 11. A fixed plate 16 is fixed on the adjacent side surface at the opening of the through groove 15. The top surface of the fixed plate 16 abuts against the inner surface of the other end of the limit plate 10. A connection card slot 13 for the end of the limit plate 10 to snap into is opened at the bottom of one side inner wall of the installation groove 11, which is convenient for workers to quickly pull out the plug 7 from the inside of the tank opening 2, facilitating workers to access samples and improving the operation efficiency of workers, with good practicability.

[0021] As Figure 3 shown, a limit partition 17 is installed inside the installation groove 11. The side surface of the limit partition 17 is in fit connection with the surface of the limit plate 10, which is convenient for limiting the telescopic spring 12, so that when the limit plate 10 moves, the telescopic spring 12 will not shift.

[0022] As Figure 3 shown, on one side surface of one end of the limit plate 10, limit convex plates 14 are symmetrically fixed. Oppositely arranged wall grooves for engaging the limit convex plates 14 are formed in the connection card slot 13, which is convenient for limiting one end of the limit plate 10, so that one end of the limit plate 10 will not be separated from the inside of the connection card slot 13 after being engaged, which is convenient for improving the firmness of the limit plate 10 after being engaged.

[0023] As Figure 2 and Figure 4 shown, a limit component is arranged inside the limit card slot 18. The limit component includes rubber strips 21 symmetrically arranged at the opening of the limit card slot 18. A double-sided adhesive 22 is arranged on the inner surface of the rubber strip 21. The surface of the double-sided adhesive 22 is adhesively connected to the inner wall of the opening of the limit card slot 18. Limit magnetic rings 20 are symmetrically fixed between the two rubber strips 21. Both ends of the limit magnetic ring 20 are fixedly connected to the surface of the rubber strip 21. The longitudinal section of the limit magnetic ring 20 is arc-shaped. Fixed grooves 23 are equidistantly formed in the inner wall of the strip-shaped groove 19. A ball 24 is installed inside the fixed groove 23. The surface of the ball 24 is in rolling fit with the surface of the limit pull rod 9, which is convenient for further limiting one end of the limit pull rod 9, so that one end of the limit pull rod 9 is firmly engaged, so that the lifting cylinder 8 at the other end will not shake inside the inner liner 5. At the same time, it is also convenient to reduce the friction force between the limit pull rod 9 and the plug 7, which can reduce the degree of frictional damage of the plug 7 and is convenient for extending the service life of the plug 7, and the practical effect is good.

[0024] The utility model provides a liquid nitrogen tank facilitating sample access and storage, and the specific working principle is as follows: When the utility model is in use, first, the lifting cylinder 8 is placed inside the inner tank 5 through the limiting pull rod 9, so that one end of the limiting pull rod 9 can be engaged with the inside of the limiting slot 18 on the top surface of the tank mouth 2. At this time, the side surface of one end of the limiting pull rod 9 will be in extrusion fit with the surface of the rubber strip 21 at the opening of the limiting slot 18 until one end of the limiting pull rod 9 is completely engaged with the inside of the limiting slot 18. At this time, the surface of one end of the limiting pull rod 9 will be magnetically connected to the surface of the limiting magnetic ring 20, so that one end of the limiting pull rod 9 can be limited and engaged. Subsequently, the plug 7 can be engaged with the inside of the tank mouth 2, so that one end of the plug 7 can extend and engage with the inside of the neck tube 6. At the same time, the limiting pull rod 9 will be in limiting engagement with the strip-shaped groove 19 on the side surface of the plug 7, and at the same time, the surface of the limiting pull rod 9 will be in rolling fit with the surface of the ball 24 inside the fixed groove 23, thereby reducing the friction force during the engagement and installation of the plug 7, facilitating the reduction of frictional damage, prolonging the service life of the plug 7, and also facilitating the improvement of the limiting effect on the lifting cylinder 8 at the other end of the limiting pull rod 9, so that the lifting cylinder 8 is not likely to shake inside the inner tank 5, and the practical effect is good; When the plug 7 is engaged with the inside of the tank mouth 2, the surface of one end of the limiting plate 10 will contact the top surface of the tank mouth 2. When one end of the limiting plate 10 is squeezed, one end of the limiting plate 10 will move into the installation groove 11, and at the same time, the telescopic spring 12 inside the installation groove 11 will contract. At the same time, the other end of the limiting plate 10 will extend out of the opening of the through groove 15 until one end of the limiting plate 10 completely moves into the installation groove 11, and the surface of one end of the limiting partition 17 abuts against the surface of the limiting plate 10. At this time, the limiting plate 10 can be pushed to move, so that one end of the limiting plate 10 is engaged with the inside of the connection slot 13, and the limiting convex plate 14 on the side surface of one end of the limiting plate 10 is engaged with the inside wall of the connection slot 13. At this time, the other end of the limiting plate 10 will be limited and tightened by the fixing plate 16, so that the plug 7 can be firmly engaged. When sampling is required later, the worker can move the limiting plate 10, so that one end of the limiting plate 10 is separated from the inside of the connection slot 13. Subsequently, the rebounding force generated by the telescopic spring 12 will act on the limiting plate 10, so that the limiting plate 10 can generate a certain thrust on the plug 7. At this time, the worker can quickly pull out the plug 7, facilitating the worker's sampling operation and improving the worker's work efficiency, and the practicability is good.

[0025] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid nitrogen tank for convenient storage and retrieval of samples, comprising an outer shell (1), an inner shell (5) is arranged inside the outer shell (1), a tank mouth (2) is fixed in the middle of the top surface of the outer shell (1), a locking cover (3) is installed on the surface of the tank mouth (2), a neck tube (6) is fixed between the top of the inner shell (5) and the tank mouth (2), a plurality of lifting cylinders (8) are arranged inside the inner shell (5), a limiting pull rod (9) is installed on one side surface of each lifting cylinder (8), a cover plug (7) is installed in the tank mouth (2), a limiting groove (18) for one end of the limiting pull rod (9) to be engaged is formed at an equal angle on the top surface of the tank mouth (2), and a strip groove (19) for the limiting pull rod (9) to be engaged is formed at an equal angle on the side surface of the cover plug (7), characterized in that: The top end surface of the cover plug (7) is provided with a functional component; The functional component comprises a limit plate (10) symmetrically arranged on the top end surface of the cover plug (7); a mounting groove (11) for mounting the limit plate (10) is symmetrically provided on the bottom end surface of the top side edge of the cover plug (7); a telescopic spring (12) is fixed to one side of the inside of the mounting groove (11); one end of the telescopic spring (12) abuts against the inner surface of one end of the limit plate (10); a through groove (15) for the other end of the limit plate (10) to pass through is provided on the inner top surface of the mounting groove (11); a fixing plate (16) is fixed to the adjacent side surface of one side of the opening of the through groove (15); the top end surface of the fixing plate (16) abuts against the inner surface of the other end of the limit plate (10); and a connecting groove (13) for engaging one end of the limit plate (10) is provided on the bottom of the inner wall of one side of the mounting groove (11).

2. A liquid nitrogen tank for convenient storage and access of samples according to claim 1, characterized in that: A limiting partition plate (17) is installed inside the installation groove (11), and a side surface of the limiting partition plate (17) is fitted and connected to the surface of the limiting plate (10).

3. A liquid nitrogen tank for convenient storage and access of samples according to claim 1, characterized in that: A limiting convex plate (14) is symmetrically fixed to the side surface of one end of the limiting plate (10), and a wall groove for the limiting convex plate (14) to engage is symmetrically opened on the connecting slot (13).

4. The liquid nitrogen tank for convenient storage and access of samples according to claim 1, characterized in that: Multiple layers of heat insulation are filled between the interior of the outer shell (1) and the exterior of the inner liner (5), and a handle (4) is installed on the top end surface of the outer shell (1).

5. The liquid nitrogen tank for convenient storage and access of samples according to claim 1, characterized in that: A limiting component is arranged inside the limiting slot (18), and the limiting component comprises a rubber strip (21) symmetrically arranged at the opening of the limiting slot (18), and a double-sided adhesive tape (22) is arranged on the inner surface of the rubber strip (21), and the surface of the double-sided adhesive tape (22) is bonded to the inner wall of the opening of the limiting slot (18), and a limiting magnetic ring (20) is symmetrically fixed between the two rubber strips (21), and the two ends of the limiting magnetic ring (20) are fixedly connected to the surface of the rubber strip (21), and the longitudinal section of the limiting magnetic ring (20) is arc-shaped.

6. The liquid nitrogen tank for convenient storage and access of samples according to claim 1, characterized in that: The inner wall of the strip groove (19) is provided with fixed grooves (23) at equal distances, and a ball (24) is installed inside the fixed groove (23), and the surface of the ball (24) is rollingly fitted with the surface of the limit pull rod (9).

Images