CN113335770A

CN113335770A - Liquid nitrogen storage jar safe in utilization

Info

Publication number: CN113335770A
Application number: CN202110555560.3A
Authority: CN
Inventors: 刘智; 刘畅
Original assignee: Changsha Zhongyi Gas Co ltd
Current assignee: Changsha Zhongyi Gas Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-09-03
Anticipated expiration: 2041-05-21
Also published as: CN113335770B

Abstract

The application relates to a liquid nitrogen storage tank safe in use, which comprises an outer tank, an inner tank, a neck pipe, a vacuum sealing joint and a plurality of lifting cylinders, wherein the inner tank is fixedly installed inside the outer tank, two ends of the neck pipe are respectively communicated and fixedly connected with the opening edges of the inner tank and the outer tank, the vacuum sealing joint covers and is fixed on the opening edge of the outer tank, the lifting cylinders are arranged inside the inner tank, a mounting device is arranged in the neck pipe and comprises a mounting assembly and at least one telescopic assembly, the mounting assembly comprises at least one mounting plate, the mounting plate covers the opening edge of the inner tank, the mounting plate is provided with at least one placing opening, the telescopic assembly comprises a placing plate and at least one telescopic piece fixedly connected with the placing opening, the telescopic end of the telescopic piece is vertically telescopic towards the inside of the inner tank, the placing plate covers the lower edge of the placing opening, the placing plate is fixedly connected with the telescopic end of the telescopic piece, the lifting cylinder is arranged on the upper plate surface of the placing plate. This application can effectually reduce the loss of liquid nitrogen when access biological sample.

Description

Liquid nitrogen storage jar safe in utilization

Technical Field

The application relates to the field of liquid nitrogen storage devices, in particular to a liquid nitrogen storage tank safe to use.

Background

A liquid nitrogen storage tank is a container for storing liquid nitrogen, which is often used for preservation and transportation of biological samples and the like because of its ultra-low temperature.

Liquid nitrogen storage jar primary structure includes outer jar, inner tank, neck pipe, vacuum sealing joint, locking closure and a plurality of carry a section of thick bamboo, and outer jar and inner tank are the upper shed setting, and the inner tank installation is fixed in the inside of outer jar and is the vacuum setting between the two. The both ends of neck pipe communicate respectively in the opening border of inner tank and the opening border of outer jar, carry a section of thick bamboo and place in the inner tank, carry a section of thick bamboo fixedly connected with and set up the handle at outer jar opening border, and the handle is sealed through the vacuum that the lid fits outer jar opening border and is connected fixedly.

In view of the above-mentioned related technologies, the inventor believes that when storing a biological sample, it is necessary to open a vacuum sealing joint first, then place a plurality of lifting cylinders in an inner tank in sequence, and finally cover and fix the vacuum sealing joint on an opening edge of an outer tank.

Disclosure of Invention

In order to reduce the waste liquid nitrogen in the process of accessing biological samples, the application provides a liquid nitrogen storage tank which is safe to use.

The application provides a liquid nitrogen storage jar safe in utilization adopts following technical scheme:

a liquid nitrogen storage tank safe in utilization comprises an outer tank, an inner tank, a neck pipe, a vacuum sealing joint and a plurality of lifting cylinders, wherein the inner tank is fixedly arranged in the outer tank, two ends of the neck pipe are respectively communicated and fixedly connected with the opening edges of the inner tank and the outer tank, the vacuum sealing joint covers the opening edge fixed on the outer tank, the lifting cylinders are arranged in the inner tank, a mounting device is arranged in the neck pipe and comprises a mounting component and at least one telescopic component, the mounting component comprises at least one mounting plate, the mounting plate covers the opening edge of the inner tank, the mounting plate is provided with a placing opening with at least one diameter larger than the outer diameter of the lifting cylinder, the telescopic component comprises a placing plate and at least one telescopic piece fixedly connected with the placing opening, the telescopic end of the telescopic piece is vertically arranged towards the inner tank, the placing plate covers the lower edge of the placing opening, the placing plate is fixedly connected to the telescopic end of the telescopic piece, and the lifting cylinder is arranged on the upper plate surface of the placing plate.

By adopting the technical scheme, when a biological sample is stored and taken, the biological sample is placed in the lifting cylinder only by opening the vacuum sealing joint covering the opening of the outer tank, then the lifting cylinder is placed on the placing plate, and the lifting cylinder is pushed to enable the placing plate to pass through the placing opening and then be positioned in the inner tank, at the moment, the telescopic end of the telescopic piece can extend out, and other positions of the opening of the inner tank are plugged by the mounting plate, so that the loss of liquid nitrogen can be effectively reduced; simultaneously when taking out biological sample, only need will carry a relative inner tank of section of thick bamboo and take out, place the board butt under the effect of extensible member in the lower border of placing the mouth this moment to do the shutoff to placing the mouth, the loss of liquid nitrogen when reducing to take out biological sample, thereby effectual optimization access biological sample's in-process, the waste of liquid nitrogen.

Optionally, the extensible member includes the flexible pipe that a plurality of diameters reduce in proper order, flexible pipe overlaps in proper order and establishes and slides and connect in the flexible pipe that the diameter is littleer flexible pipe fixed connection place the board and both mutually perpendicular set up, and the diameter is the biggest flexible pipe fixed connection place mouthful opening border and lie in the top of mounting panel, be provided with the shrink piece that makes a plurality of flexible pipe shrink in the flexible intraductal.

Through adopting above-mentioned technical scheme, flexible pipe is under the effect of shrink piece, the flexible pipe shrink that can relative diameter is the biggest to can drive and place the relative mounting panel of board and contract and butt in placing the mouth.

Optionally, the inner wall of the telescopic pipe is provided with a telescopic groove extending along the axial direction, the telescopic groove is clamped and connected with a telescopic block in a sliding manner, the telescopic block is fixedly connected with the outer wall of the telescopic pipe which is sleeved with the telescopic pipe in the telescopic groove connected with the telescopic groove in the sliding manner, the contraction part is a spring, and two ends of the contraction part are respectively and fixedly connected with the telescopic pipe with the largest diameter and the telescopic pipe with the smallest diameter.

By adopting the technical scheme, the sliding stroke of the telescopic block can be limited by the telescopic groove, so that the sliding stroke of the telescopic pipes is limited, and the possibility that a plurality of telescopic pipes are separated from each other is reduced.

Optionally, at least one clamping piece for clamping the lifting barrel is arranged in the placing opening.

Through adopting above-mentioned technical scheme, the joint spare can block carrying a section of thick bamboo to be used for reducing and carry a section of thick bamboo and break away from the possibility of inner tank under the effect of extensible member.

Optionally, place and seted up the joint hole in the opening border of mouth, the joint hole sets up towards the center of placing the mouth for shoulder hole and its tip, joint spare is including setting up the joint piece in the joint hole and being used for pushing out the joint spring that the joint piece blocked the hole, the joint piece is step shaft column structure and tip and wears out the joint hole, the main aspects of joint piece support the step face of locating the joint hole, the tip butt of joint piece is in the outer lane border of carrying a section of thick bamboo.

Through adopting above-mentioned technical scheme, will carry a section of thick bamboo and place in interior jar after, the joint piece can stretch out joint hole and butt in carrying a section of thick bamboo under the effect of joint spring to the restriction is carried the relative inner tank's of a section of thick bamboo and is slided, and can reduce the relative joint hole of joint piece and break away from the possibility in the step face in joint hole through the main aspects butt of joint piece.

Optionally, the upper portion fixedly connected with joint ring of carrying a section of thick bamboo, the joint annular has been seted up at joint ring's outer lane border, the joint piece supports to be located in the joint annular.

Through adopting above-mentioned technical scheme, can optimize the stability to carrying the locking that slides of a section of thick bamboo through joint piece butt in the joint annular, can also do the shutoff to placing the mouth through the joint ring simultaneously, when further reducing access biological sample, the waste of liquid nitrogen.

Optionally, encircle a plurality of openings that rotate have been seted up to the joint ring, flexible pipe wears to locate to rotate the opening, fixedly connected with a plurality of transition pieces in the joint annular, the transition piece is smooth transition with the cell wall of joint annular.

Through adopting above-mentioned technical scheme, can reduce the interference between joint ring and the flexible pipe through rotating the mouth, simultaneously when taking out and carrying a section of thick bamboo, only need rotate and carry a section of thick bamboo, make the joint piece break away from the joint annular under the effect of transition piece to carry a section of thick bamboo to produce the possibility of vibration when reducing to take out and carry a section of thick bamboo.

Optionally, the opening border of inner tank is formed with the fixed plate to turning over outward, the opening border fixed connection of neck pipe is in the outer lane border of fixed plate, the mounting panel is provided with a plurality ofly, and is a plurality of the opening border that the mounting panel spliced each other and lid fit the inner tank, the fixed plate is provided with and makes the mounting panel towards inner tank open-ended center pivoted rotation torsional spring, be provided with a plurality of mounting panels of drive orientation in the neck pipe and keep away from inner tank opening central direction pivoted control assembly.

By adopting the technical scheme, the fixing plate is used for mounting the mounting assembly, and the mounting plate rotates towards the direction of the center of the opening of the inner tank under the action of the torsion spring; when a plurality of lifting cylinders need to be stored, only the control assembly needs to be used, and the centers of the plurality of mounting plates relative to the opening of the inner tank are opened.

Optionally, the control assembly includes that coaxial rotation connects in the inside control tube and the control ring gear of neck pipe, the rotation center fixedly connected with meshing of mounting panel and the control gear of control ring gear, outer jar is worn to establish and threaded connection has the restriction screw rod, restriction screw rod butt in the control tube.

Through adopting above-mentioned technical scheme, when needs control mounting panel rotate, only need rotate the control tube, drive a plurality of control gear rotations through the control ring gear to drive a plurality of mounting panels rotate can, when needs mounting panel keeps rotating the locking, only need rotate the restriction screw rod simultaneously, make restriction screw rod butt in the control tube can.

In summary, the present application includes at least one of the following beneficial technical effects:

when the biological sample is stored and taken, the vacuum sealing joint covering the opening of the outer tank is only required to be opened, the biological sample is placed in the lifting cylinder, then the lifting cylinder is placed on the placing plate, the lifting cylinder is pushed, the placing plate penetrates through the placing opening and then is positioned in the inner tank, the telescopic end of the telescopic piece extends out at the moment, and the other parts of the opening of the inner tank are sealed by the mounting plate, so that the escape of liquid nitrogen can be effectively reduced; simultaneously when taking out biological sample, only need will carry a relative inner tank of section of thick bamboo and take out, place the board butt under the effect of extensible member in the lower border of placing the mouth this moment to do the shutoff to placing the mouth, the loss of liquid nitrogen when reducing to take out biological sample, thereby effectual optimization access biological sample's in-process, the waste of liquid nitrogen.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is a schematic cross-sectional structure diagram of an embodiment of the present application.

FIG. 3 is a schematic cross-sectional view of a retraction assembly according to an embodiment of the present application.

Fig. 4 is an enlarged schematic view of a portion a of fig. 3.

Fig. 5 is an enlarged schematic view of a portion B of fig. 2.

Fig. 6 is a schematic structural diagram of a clip according to an embodiment of the present application.

Fig. 7 is an exploded view of a mounting device and control assembly according to an embodiment of the present application.

Fig. 8 is an enlarged schematic view of a portion C in fig. 2.

Fig. 9 is an enlarged schematic view of a portion D in fig. 2.

Description of reference numerals: 1. an outer tank; 11. a restraining screw; 12. a sealing tube; 2. an inner tank; 21. a fixing plate; 3. a neck tube; 4. sealing the joint in vacuum; 5. lifting the cylinder; 51. a snap ring; 511. clamping the ring groove; 512. a rotation port; 513. a transition block; 52. a handle; 6. mounting the component; 61. mounting a plate; 611. a placement port; 612. a clamping hole; 613. a rotating shaft; 62. a clamping piece; 621. a clamping block; 622. clamping a spring; 63. a torsion spring; 64. a control gear; 7. a telescoping assembly; 71. placing the plate; 72. a telescoping member; 721. a telescopic pipe; 722. a telescopic groove; 723. a telescopic block; 73. a constriction; 8. a control component; 81. a control tube; 811. pipe rotation; 812. a connecting rod; 813. a locking ring; 82. controlling the toothed ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a liquid nitrogen storage jar safe in utilization. Referring to fig. 1 and 2, the storage tank includes an outer tank 1, an inner tank 2, a neck tube 3, a vacuum sealing joint 4 and a plurality of lifting cylinders 5, the inner tank 2 is fixed inside the outer tank 1 through a plurality of supporting rods, and both the outer tank 1 and the inner tank 2 are of an upper opening structure. The both ends opening border of neck 3 is fixed connection respectively in the opening border of outer jar 1 and the opening border of inner tank 2, carries a section of thick bamboo 5 and wholly sets up in neck 3 to carry the handle 52 that the top fixedly connected with of a section of thick bamboo 5 set up in outer jar 1 opening border, the opening border that is fixed in outer jar 1 is closed to vacuum sealing head 4 lid.

Referring to fig. 2 and 3, in order to reduce heat loss when accessing biological samples, a mounting means for mounting the lifting barrel 5 is provided in the neck tube 3.

Referring to fig. 3, 4 and 5, the mounting device includes a mounting assembly 6 and at least one telescopic assembly 7, the mounting assembly 6 includes at least one mounting plate 61, the mounting plates 61 can be arranged in one or more, and the mounting plates 61 are arranged in three in the embodiment. Three mounting panel 61 encircles the central axis setting of neck 3 and splices each other, and the mounting panel 61 of splicing each other covers the opening border of inner tank 2.

The mounting plate 61 is provided with at least one placing opening 611 for placing the lifting cylinder 5 inside the inner tank 2, and one or more placing openings 611 can be arranged. In this embodiment, one mounting plate 61 is provided with one placing opening 611, and the number of the telescopic assemblies 7 corresponding to the plurality of placing openings 611 is three.

The telescopic assembly 7 comprises a placing plate 71 and at least one telescopic member 72, the placing plate 71 covers the lower edge of the opening of the placing opening 611, the number of the telescopic members 72 can be one or more, the number of the telescopic members 72 is two, and the two telescopic members 72 are arranged around the center of the placing opening 611.

Referring to fig. 3, 4 and 5, the telescopic member 72 includes a plurality of telescopic pipes 721 having diameters which are sequentially increased, the telescopic pipes 721 are perpendicular to the mounting plate 61, one end of the telescopic pipe 721 having the largest diameter facing the inner tank 2 is fixedly connected to an opening edge of the placing opening 611, the telescopic pipes 721 are sequentially sleeved on the telescopic pipes 721 having smaller diameters, and one end of the telescopic pipe 721 having the smallest diameter facing the inside of the inner tank 2 is fixedly connected to the placing plate 71. The lifting tube 5 is placed on the upper plate surface of the placing plate 71 which is opened towards the outer tank 1, a contraction member 73 which enables the plurality of telescopic tubes 721 to contract is arranged in the telescopic tubes 721, the contraction member 73 is a spring, and preferably, one end of the contraction spring 73 is fixedly connected with the contraction spring.

When the biological sample is taken and taken through the lifting cylinder 5, the mounting plate 61 can seal the opening edge of the inner tank 2 only by opening the vacuum sealing joint 4; meanwhile, when the biological sample is frozen, the lifting cylinder 5 is only required to be placed on the placing plate 71, and at the moment, the placing plate 71 covers the lower edge of the opening of the placing opening 611, so that the dissipated liquid nitrogen can be effectively reduced; meanwhile, after the lifting cylinder 5 is pressed on the placing plate 71 and the whole is placed in the inner tank 2, the vacuum sealing joint 4 is covered; meanwhile, in the process of taking out the lifting barrel 5, the placing plate 71 can rise along with the lifting barrel 5 and cover the placing opening 611, so that the situation that liquid nitrogen escapes through the placing opening 611 after the lifting barrel 5 is taken out relative to the placing opening 611 is reduced, and the escape of the liquid nitrogen in the process of storing and taking the biological sample is effectively reduced.

Referring to fig. 4 and 5, an expansion slot 722 is formed in an inner wall of the expansion tube 721, the expansion slot 722 extends along an axial direction of the expansion tube 721, an expansion block 723 is clamped and slidably connected in the expansion slot 722, the expansion block 723 is fixedly connected to an outer wall of an upper portion of the expansion tube 721, that is, the expansion block 723 is fixedly connected to an outer wall of the expansion tube 721 sleeved by the expansion tube 721 in the expansion slot 722, and the outer wall of the expansion tube 721 with the largest diameter is not fixedly connected with the expansion block 723, so as to limit an axial sliding stroke of the expansion tube 721.

Referring to fig. 5 and 6, in order to limit the automatic contraction of the lifting barrel 5 under the action of the contraction member 73, at least one clamping member 62 is disposed in the placement opening 611 for clamping the lifting barrel 5 or the lifting handle 52, one or more clamping members 62 may be disposed, four clamping members 62 are disposed in this embodiment, and four clamping members 62 are disposed around the center of the placement opening 611.

The lifting barrel 5 or the lifting handle 52 is fixedly connected with a clamping ring 51, the clamping ring 51 is in an annular structure and is arranged with the lifting barrel 5 along the same central axis, and the clamping ring 51 is fixedly connected with the outer wall of the lifting barrel 5 in the embodiment. The edge of the outer ring of the clamping ring 51 is provided with a clamping ring groove 511, and the clamping ring groove 511 and the clamping ring 51 are arranged on the same central axis.

Referring to fig. 5 and 6, a plurality of clamping holes 612 are arranged around the center of the placing opening 611, four clamping holes are arranged corresponding to the clamping pieces 62 in the embodiment, and the clamping holes 612 are stepped holes and the small ends of the clamping holes are arranged towards the central opening of the placing opening 611. The clamping piece 62 comprises a clamping block 621 and a clamping spring 622 arranged in the clamping hole 612, the clamping block 621 is of a stepped shaft structure, the cross section of the clamping block 621 can be circular or rectangular, and the embodiment is rectangular.

The small end of the clamping block 621 penetrates through the clamping hole 612 to be clamped in the clamping ring groove 511 to limit the sliding of the clamping ring 51.

In the process of placing the lifting barrel 5 with the biological sample in the inner tank 2 through the placing opening 611, the clamping ring 51 is located in the placing opening 611, and the clamping block 621 abuts against the clamping ring groove 511 under the action of the clamping spring 622, so that the possibility that the lifting barrel 5 is automatically separated from the inner tank 2 due to the fact that the lifting barrel 5 contracts under the action of the telescopic piece 72 is reduced through the clamping ring 51; meanwhile, the biological sample can be further sealed and stored, so that the dissipation of liquid nitrogen is reduced.

Referring to fig. 5 and 6, in order to reduce the vibration caused by the fact that the clamping block 621 is separated from the clamping ring groove 511, the lifting cylinder 5 is vibrated, the transition block 513 is fixedly connected in the clamping ring groove 511, and the groove walls of the transition block 513 and the clamping ring groove 511 are in smooth transition, so that when the lifting cylinder 5 is taken out, the lifting cylinder 5 only needs to be rotated, the clamping block 621 is contracted under the action of the transition block 513, and the lifting cylinder 5 can be taken out under the condition that the vibration of the lifting cylinder 5 is reduced.

In addition, in order to reduce the possibility of interference between the snap ring 51 and the expansion member 72, the expansion tube 721 with the largest diameter is inserted into the opening edge of the placing opening 611; or a plurality of rotating openings 512 are arranged around the edge of the clamping ring 51, so that the telescopic tube 721 is arranged through the rotating openings 512; in this embodiment, the snap ring 51 is provided with a rotation opening 512.

Referring to fig. 7 and 8, the opening edge of the inner vessel 2 is folded outward to form a fixed plate 21, and the extension tube 721 is perpendicular to the fixed plate 21. The opening edge of the neck pipe 3 facing the inner tank 2 is fixedly connected with the outer ring edge of the fixed plate 21. The mounting plate 61 is rotatably connected to the fixing plate 21 for enabling the plurality of mounting plates 61 to be rotated when more biological samples need to be placed, so that the opening of the inner vessel 2 is completely opened, thereby providing a space enough to place the lifting barrel 5.

Meanwhile, in order to maintain the tightness when the plurality of mounting plates 61 are spliced with each other, a rotating shaft 613 extending toward the inner tank 2 is fixedly connected to the rotating center of the mounting plate 61, the rotating shaft 613 penetrates through and is rotatably connected to the fixing plate 21, and the rotating shaft 613 is sleeved with a torsion spring 63 which enables the rotating shaft 613 and the mounting plate 61 to rotate toward the center of the opening of the inner tank 2.

A plurality of control components 8 for driving the mounting plate 61 to rotate towards the direction far away from the opening center of the inner tank 2 are arranged in the neck pipe 3.

With reference to fig. 7 and 8, the control assembly 8 comprises a control tube 81 and a control ring 82, the control tube 81 being rotatably connected to the neck 3 and both being arranged with the central axis. The control gear ring 82 is coaxially and fixedly connected to the lower end of the control pipe 81, the control gear 64 is fixedly connected to the rotation center of the mounting plate 61, and the control gear 64 is engaged with the control gear ring 82, wherein the control gear ring 82 may be an inner gear ring or an outer gear ring, and in this embodiment, is an inner gear ring.

Therefore, when the mounting plates 61 are separated from the opening of the inner tank 2, it is only necessary to rotate the control pipe 81 and drive the control gears 64 to rotate through the control ring gear 82, so that the mounting plates 61 rotate in a direction away from the center of the opening of the inner tank 2.

Referring to fig. 7 and 9, a rotating pipe 811 is disposed inside the control pipe 81, the rotating pipe 811 and the control pipe 81 are disposed on the same central axis, a plurality of connecting rods 812 are disposed around the rotating pipe 811, and both ends of the connecting rods 812 are fixedly connected to the rotating pipe 811 and the inner wall of the control pipe 81, respectively, so as to assist in rotating the control pipe 81.

The upper opening edge of the control tube 81 is folded outward to form a locking ring 813. The outer tank 1 is provided with a limiting screw 11, the limiting screw 11 penetrates into the neck pipe 3 and abuts against the locking ring 813, so that the limiting screw 11 abuts against the control pipe 81 through the locking ring 813. The limiting screw 11 is sleeved and connected with a sealing tube 12 in a threaded manner, and two ends of the sealing tube 12 are respectively and fixedly connected to the inner wall of the outer tank 1 and the tube wall of the neck tube 3.

When the liquid nitrogen leakage prevention device is used, the limiting screw 11 can be abutted to the locking ring 813 by rotating the limiting screw 11, so that the control tube 81 is locked by rotating, the possibility of rotation of the control tube 81 caused by the plurality of torsion springs 63 is reduced, and meanwhile, the sealing tube 12 can be used for sealing among the limiting screw 11, the neck tube 3 and the outer tank 1, so that the possibility of leakage and dissipation of liquid nitrogen is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a liquid nitrogen storage jar safe in utilization, includes outer jar (1), inner tank (2), neck (3), vacuum sealing joint (4) and a plurality of carry a section of thick bamboo (5), the inside of outer jar (1) is fixed in inner tank (2) installation, the both ends of neck (3) communicate respectively and fixed connection in the opening border of inner tank (2) and outer jar (1), the opening border that is fixed in outer jar (1) is closed in vacuum sealing joint (4), carry a section of thick bamboo (5) as to the inside of inner tank (2), its characterized in that: a device for installation is arranged in the neck pipe (3), the installation device comprises an installation component (6) and at least one telescopic component (7), the mounting component (6) comprises at least one mounting plate (61), the mounting plate (61) covers the opening edge of the inner tank (2), the mounting plate (61) is provided with at least one placing opening (611) with the diameter larger than the outer diameter of the lifting cylinder (5), the telescopic component (7) comprises a placing plate (71) and at least one telescopic piece (72) fixedly connected with the placing opening (611), the telescopic end of the telescopic piece (72) is arranged towards the inner part of the inner tank (2) and vertically extends and retracts, the placing plate (71) covers the lower edge of the placing opening (611), the placing plate (71) is fixedly connected to the telescopic end of the telescopic piece (72), and the lifting cylinder (5) is arranged on the upper plate surface of the placing plate (71).

2. A liquid nitrogen storage tank safe in use according to claim 1, wherein: the telescopic part (72) comprises a plurality of telescopic pipes (721) with diameters sequentially reduced, the telescopic pipes (721) are sequentially sleeved and connected with the telescopic pipes (721) with the smaller diameters in a sliding mode, the telescopic pipes (721) with the smallest diameters are fixedly connected with the placing plate (71) and are perpendicular to each other, the telescopic pipes (721) with the largest diameters are fixedly connected with the opening edge of the placing opening (611) and are located above the installing plate (61), and the telescopic pipes (721) are internally provided with contraction parts (73) enabling the telescopic pipes (721) to contract.

3. A liquid nitrogen storage tank safe in use according to claim 2, wherein: the inner wall of the telescopic pipe (721) is provided with a telescopic groove (722) extending along the axial direction, a telescopic block (723) is clamped in the telescopic groove (722) and connected in a sliding manner, the telescopic block (723) is fixedly connected to the outer wall of a telescopic pipe (721) sleeved on the telescopic pipe (721) where the telescopic groove (722) connected in a sliding manner is located, the contraction part (73) is a spring, and two ends of the contraction part (73) are respectively and fixedly connected to the telescopic pipe (721) with the largest diameter and the telescopic pipe (721) with the smallest diameter.

4. A liquid nitrogen storage tank safe in use according to claim 2, wherein: at least one clamping piece (62) used for clamping the lifting barrel (5) is arranged in the placing opening (611).

5. A storage tank for liquid nitrogen safe in use according to claim 4, characterized in that: place opening edge of mouth (611) and seted up joint hole (612), joint hole (612) are shoulder hole and its tip towards the center setting of placing mouth (611), joint spare (62) including set up joint piece (621) in joint hole (612) and be used for releasing joint spring (622) of joint hole (612) with joint piece (621), joint piece (621) are step shaft column structure and tip and wear out joint hole (612), the main aspects of joint piece (621) support the step face of locating joint hole (612), the tip of joint piece (621) butts in the outer lane border of carrying a section of thick bamboo (5).

6. A storage tank for liquid nitrogen safe to use as claimed in claim 5, wherein: carry upper portion fixedly connected with joint ring (51) of a section of thick bamboo (5), joint annular (511) have been seted up at the outer lane border of joint ring (51), joint piece (621) are to locating in joint annular (511).

7. A storage tank for liquid nitrogen safe in use according to claim 6, characterized in that: encircle a plurality of rotation mouths (512) have been seted up in joint ring (51), rotation mouth (512) are worn to locate by flexible pipe (721), a plurality of transition pieces (513) of fixedly connected with in joint annular groove (511), the cell wall of transition piece (513) and joint annular groove (511) is smooth transition.

8. A liquid nitrogen storage tank safe in use according to claim 1, wherein: the opening border of inner tank (2) is formed with fixed plate (21) to turning over outward, the opening border fixed connection of neck pipe (3) is in the outer lane border of fixed plate (21), mounting panel (61) are provided with a plurality ofly, and are a plurality of mounting panel (61) are spliced each other and are covered the opening border of inner tank (2), fixed plate (21) are provided with and make mounting panel (61) towards inner tank (2) open-ended center pivoted rotation torsional spring (63), be provided with a plurality of mounting panels of drive (61) in neck pipe (3) and keep away from inner tank (2) opening center direction pivoted control assembly (8).

9. A liquid nitrogen storage tank safe in use according to claim 9, wherein: control assembly (8) include that coaxial rotation connects in control tube (81) and control ring gear (82) of neck pipe (3) inside, the rotation center fixedly connected with meshing of mounting panel (61) and control gear (64) of control ring gear (82), outer jar (1) is worn to establish and threaded connection has limiting screw (11), limiting screw (11) butt in control tube (81).