CN218617681U

CN218617681U - Dewar

Info

Publication number: CN218617681U
Application number: CN202222803140.5U
Authority: CN
Inventors: 梁丽丽
Original assignee: Sinoscience Fullcryo Zhongshan Low Temperature Equipment Manufacturing Co Ltd
Current assignee: Sinoscience Fullcryo Zhongshan Low Temperature Equipment Manufacturing Co Ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-03-14
Anticipated expiration: 2032-10-24

Abstract

The utility model provides a Dewar relates to Dewar technical field. The Dewar comprises a shell, an inner container, a neck tube and a connecting device. The top of the shell is provided with a first through hole; the inner container is arranged in the shell and used for storing low-temperature liquid, and the top of the inner container is provided with a second through hole corresponding to the first through hole; the neck pipe sequentially penetrates through the second through hole and the first through hole; the connecting device is arranged between the inner container and the shell and is respectively and fixedly connected with the bottom of the inner container and the bottom of the shell. The utility model provides a dewar has effectively reduced the shearing force of the welding seam department of neck pipe and shell, has promoted security and reliability, prevents that the dewar from damaging in the transportation. And the shaking amplitude of the inner container in the transportation process can be effectively reduced, so that the thermoacoustic oscillation of the low-temperature liquid stored in the inner container is reduced, and the evaporation rate of the low-temperature liquid is further reduced.

Description

Dewar

Technical Field

The utility model relates to a dewar technical field especially relates to a dewar.

Background

In the fields of low-temperature liquid storage, low-temperature research and superconduction, a Dewar flask occupies a very important position, is also called a thermos flask, and can well maintain a low-temperature environment, so that the energy consumption of refrigeration equipment is reduced.

However, the liner of the dewar bottle in the prior art is mostly fixed to the housing by welding through the top neck tube, and only the top neck tube is supported by the joint of the housing, so that the shaking amplitude of the bottom of the liner is large, the shearing force at the welding seam of the top neck tube and the housing is too large in the transportation process, and the welding seam is easily broken to cause the damage of the dewar.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at overcoming the not enough among the prior art, this application provides a dewar to solve among the prior art inner bag of dewar bottle and be mostly through its top neck and shell welded fastening, only this one of junction of top neck and shell supports, make the bottom of inner bag rock the range great, the welding seam department shearing force of top neck and shell is too big in the transportation, lead to its easy fracture of messenger's welding seam department and cause the technical problem that the dewar damaged.

The utility model provides a following technical scheme:

a dewar comprising:

the top of the shell is provided with a first through hole;

the inner container is arranged in the shell and used for storing low-temperature liquid, and a second through hole corresponding to the first through hole is formed in the top of the inner container;

the neck pipe sequentially penetrates through the second through hole and the first through hole;

and the connecting device is arranged between the inner container and the shell and is respectively fixedly connected with the bottom of the inner container and the bottom of the shell.

In some embodiments of the present application, the connecting device includes a connecting assembly, a wire rope and a hook, the wire rope respectively with the connecting assembly with the hook is connected, the connecting assembly with the bottom fixed connection of the inner container, the hook with the bottom fixed connection of the housing.

In some embodiments of the present application, the connection assembly includes a connection member and a fastening member, the connection member respectively with the fastening member and the bottom fixed connection of the inner container, the fastening member is provided with a limiting slot adapted to the steel wire rope, two ends of the steel wire rope respectively with the hook fixed connection, and a part of the steel wire rope is disposed in the limiting slot.

In some embodiments of the present application, the two limiting clamping grooves and the two steel wire ropes are provided at least, the two limiting clamping grooves are arranged in an intersecting manner, and the two steel wire ropes are arranged in an intersecting manner.

In some embodiments of the present application, the hooks are provided with at least four, and the four hooks are arranged at intervals along the circumferential direction of the shell.

In some embodiments of the present application, the connecting member is provided with a third through hole, and one end of the fastening member penetrates through the third through hole and is fixedly connected to the connecting member.

In some embodiments of the present application, the steel cord has a diameter of 2-5mm.

In some embodiments of this application, the dewar still includes insertion device, insertion device includes apron, screw rod and nut, the apron cover is located the top of screw rod, just the bottom surface of apron with the top surface looks butt of neck pipe, the nut set firmly in the bottom of inner bag, the screw rod is worn to locate the neck pipe with the nut is connected.

In some embodiments of this application, insertion device still includes spacing silica gel stopper and solid fixed ring, spacing silica gel stopper with gu fixed ring all overlaps and locate the circumference of screw rod, gu fixed ring is located the bottom of spacing silica gel stopper, the external diameter of spacing silica gel stopper with the inner diameter looks adaptation of neck pipe.

In some embodiments of the present application, the insertion device further includes a cap and a sealing member, the cap is sleeved on the top of the screw, the bottom surface of the cap abuts against the top surface of the cover plate, and the sealing member is disposed between the cap and the cover plate.

The embodiment of the utility model has the following advantage:

the application provides a dewar, dewar include shell, inner bag, neck pipe and connecting device, wear to locate the second through-hole of inner bag and the first through-hole of shell in proper order through setting up the neck pipe, make inner bag and shell pass through neck pipe fixed connection like this. By arranging the connecting device between the inner container and the shell and fixedly connecting the connecting device with the bottom of the inner container and the bottom of the shell respectively, a support is added on the basis that the inner container and the shell are fixedly connected through the neck tube, so that two supports are arranged between the inner container and the shell. Thereby, effectively reduced the shearing force of the welding seam department of neck pipe and shell, promoted security and reliability, prevented that the dewar from damaging in the transportation. And the shaking amplitude of the inner container in the transportation process can be effectively reduced, so that the thermoacoustic oscillation of the low-temperature liquid stored in the inner container is reduced, and the evaporation rate of the low-temperature liquid is further reduced. The inner bag of having avoided among the prior art dewar bottle is through its top neck pipe and shell welded fastening mostly, only this one of junction of top neck pipe and shell supports for the bottom of inner bag rocks the range great, and the welding seam department shearing force of top neck pipe and shell is too big in the transportation, leads to it to make welding seam department fracture easily and causes the technical problem that the dewar damaged.

In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible and obvious, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 illustrates a perspective view perspective of a Dewar according to some embodiments of the present application;

FIG. 2 illustrates another perspective, schematic view of a dewar in some embodiments of the present application;

FIG. 3 shows an enlarged schematic view of the part A structure of FIG. 2;

FIG. 4 illustrates a schematic cross-sectional view of a Dewar according to some embodiments of the present application;

FIG. 5 is an enlarged schematic view of the structure of section B of FIG. 4;

FIG. 6 illustrates a perspective view of an insertion device in some embodiments of the present application;

figure 7 shows an exploded view of an insertion device according to some embodiments of the present application.

Description of the main element symbols:

100-Dewar; 110-a housing; 111-a first via; 120-inner container; 121-a second via; 130-neck tube; 140-a connecting means; 141-a connecting assembly; 1411-a connector; 14111-third via; 1412-fastener; 14121-a limit slot; 142-a steel cord; 143-hooks; 150-an insertion device; 151-cover plate; 152-a screw; 153-a nut; 154-limit silica gel plug; 155-a fixed ring; 156-a cap; 157-sealing member.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

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. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

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 application belongs. The terminology used in the description of the templates 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.

As shown in fig. 1 to 4, embodiments of the present application provide a dewar 100 primarily for storing cryogenic liquids. The dewar 100 includes a shell 110, an inner container 120, a neck 130 and a connecting means 140.

The top of the housing 110 is provided with a first through hole 111. The inner container 120 is disposed in the outer shell 110 and used for storing low-temperature liquid, and a second through hole 121 corresponding to the first through hole 111 is formed at the top of the inner container 120. The neck 130 is sequentially inserted into the second through hole 121 and the first through hole 111.

Referring to fig. 5, the connecting device 140 is disposed between the inner container 120 and the outer shell 110, and is fixedly connected to the bottom of the inner container 120 and the bottom of the outer shell 110, respectively.

According to the Dewar 100 provided by the embodiment of the application, the first through hole 111 is formed in the top of the outer shell 110, the inner container 120 used for storing low-temperature liquid is arranged in the outer shell 110, the second through hole 121 corresponding to the first through hole 111 is formed in the top of the inner container 120, so that the neck pipe 130 can sequentially penetrate through the second through hole 121 and the first through hole 111, the neck pipe 130 and the hole walls of the second through hole 121 and the first through hole 111 can be welded, and the inner container 120 and the outer shell 110 are fixedly connected through the neck pipe 130.

Specifically, by arranging the connecting device 140 between the inner container 120 and the outer shell 110 and fixedly connecting the connecting device 140 to the bottom of the inner container 120 and the bottom of the outer shell 110, respectively, one support is added on the basis of fixedly connecting the inner container 120 and the outer shell 110 through the neck tube 130, so that two supports are provided between the inner container 120 and the outer shell 110. Therefore, the liner 120 and the top of the outer shell 110 are welded and fixed through the neck tube 130, and the liner 120 and the bottom of the outer shell 110 are fixed through the connecting device 140, thereby effectively preventing the displacement between the liner 120 and the outer shell 110 during the transportation or moving process of the Dewar 100. Therefore, the shearing force at the welding seam of the neck pipe 130 and the shell 110 is effectively reduced, the safety and the reliability are improved, and the Dewar 100 is prevented from being damaged in the transportation or moving process. And the shaking amplitude of the inner container 120 in the transportation process can be effectively reduced, so that the pressure inside the inner container 120 is kept stable, the thermoacoustic oscillation of the low-temperature liquid stored in the inner container 120 is reduced, and the evaporation rate of the low-temperature liquid is further reduced. Avoided among the prior art dewar's inner bag most to be through its top neck pipe and shell welded fastening, only this one of junction of top neck pipe and shell supports for the range is great in the bottom of inner bag is rocked, and the welding seam department shearing force of top neck pipe and shell is too big in the transportation, leads to it to make welding seam department fracture easily and causes the technical problem that the dewar damaged.

Illustratively, the cryogenic liquid may be liquid helium, the neck tube 130 may be welded and fixed to the outer shell 110 and the inner container 120 by welding parts, respectively, and the connecting device 140 may be made of a material with a small thermal conductivity, so as to reduce thermal conduction, improve the heat preservation effect of the dewar 100, and reduce the evaporation rate of the cryogenic liquid.

As shown in fig. 2, 3, 4 and 5, in an embodiment of the present application, optionally, the connecting device 140 includes a connecting assembly 141, a steel cable 142 and a hook 143, the steel cable 142 is respectively connected to the connecting assembly 141 and the hook 143, the connecting assembly 141 is fixedly connected to the bottom of the inner container 120, and the hook 143 is fixedly connected to the bottom of the outer shell 110.

In this embodiment, the steel wire 142 is connected to the connecting assembly 141 and the hook 143, and the connecting assembly 141 and the bottom of the inner container 120 are fixedly connected, the hook 143 is fixedly connected to the bottom of the outer shell 110, and the fixing connection manner can be welded, so that the inner container 120 can be fixedly connected to the outer shell 110 through the connecting device 140, and a support is added on the basis of fixedly connecting the inner container 120 and the outer shell 110 through the neck tube 130, so that two supports are provided between the inner container 120 and the outer shell 110. Therefore, the top of the liner 120 and the top of the outer shell 110 are welded and fixed through the neck tube 130, the bottom of the liner 120 and the bottom of the outer shell 110 are fixed through the connecting device 140, the dewar 100 is effectively prevented from displacing between the liner 120 and the outer shell 110 in the transportation or moving process, the shearing force at the welding seam of the neck tube 130 and the outer shell 110 is further reduced, the safety and the reliability are improved, and the dewar 100 is prevented from being damaged in the transportation or moving process. And the shaking amplitude of the inner container 120 in the transportation process can be effectively reduced, so that the pressure inside the inner container 120 is kept stable, the thermoacoustic oscillation of the low-temperature liquid stored in the inner container 120 is reduced, and the evaporation rate of the low-temperature liquid is reduced.

As shown in fig. 2, fig. 3, fig. 4 and fig. 5, in the above embodiment of the present application, optionally, the connecting assembly 141 includes a connecting piece 1411 and a fastening piece 1412, the connecting piece 1411 is respectively and fixedly connected to the fastening piece 1412 and the bottom of the inner container 120, the fastening piece 1412 is provided with a limiting clamping groove 14121 adapted to the steel wire rope 142, two ends of the steel wire rope 142 are respectively and fixedly connected to the hooks 143, and a part of the steel wire rope 142 is disposed in the limiting clamping groove 14121.

In this embodiment, the connecting element 1411 is respectively fixedly connected to the bottom of the fastening element 1412 and the bottom of the inner container 120, the connecting element 1411 is fixedly connected to the bottom of the inner container 120 by welding, and the connecting element 1411 is fixedly connected to the fastening element 1412 by screwing or welding, so that the stable connection is realized, and the connection stability is improved. The limiting clamping groove 14121 matched with the steel wire rope 142 is formed in the buckling piece 1412, so that a part of the steel wire rope 142 can be arranged in the limiting clamping groove 14121, and two ends of the steel wire rope 142 are fixedly connected with the hooks 143 respectively to limit the buckling piece 1412 to move in a direction perpendicular to the steel wire rope 142, and therefore the connecting piece 1411 and the inner container 120 are limited to move in a direction perpendicular to the steel wire rope 142. The two steel wire ropes 142 perpendicular to each other and the two limiting clamping grooves 14121 perpendicular to each other are arranged to completely limit the movement of the fastening element 1412, so as to completely limit the movement of the connecting element 1411 and the inner container 120, so that the inner container 120 is completely fixed relative to the outer shell 110.

For example, the fastening member 1412 may be made of a G10 material, and the G10 material is a composite material formed by rolling glass fiber and resin, and is characterized by insulation, corrosion resistance, wear resistance, and a small thermal conductivity, so as to reduce thermal conduction and improve the thermal insulation effect of the dewar 100.

As shown in fig. 2 and fig. 3, in the above embodiment of the present application, optionally, at least two limiting clamping grooves 14121 and at least two steel wire ropes 142 are provided, where the two limiting clamping grooves 14121 are arranged to intersect with each other, and the two steel wire ropes 142 are arranged to intersect with each other.

In this embodiment, at least two limiting clamping grooves 14121 and two steel wire ropes 142 are arranged, the two limiting clamping grooves 14121 are arranged in a cross mode, and the two steel wire ropes 142 are arranged in a cross mode, so that the movement of the buckling piece 1412 can be completely limited, the movement of the connecting piece 1411 and the inner container 120 is completely limited, the inner container 120 is completely fixed relative to the outer shell 110, the inner container 120 is prevented from shaking or moving relative to the outer shell 110 in the transportation process of the Dewar 100, the safety and the reliability are improved, and the evaporation rate of low-temperature liquid is reduced. The number of the wire ropes 142 is two, and the number of the corresponding hooks 143 is four. Of course, the number of the limiting clamping grooves 14121 and the number of the steel wire ropes 142 can be three, four or more, the number of the corresponding hooks 143 is six, eight or more, and the inner container 120 is further completely fixed relative to the outer shell 110, so that the safety and the reliability can be further improved, and the evaporation rate of the low-temperature liquid can be further reduced.

As shown in fig. 2, in the above embodiment of the present application, optionally, at least four hooks 143 are provided, and four hooks 143 are provided at intervals along the circumferential direction of the outer shell 110.

In this embodiment, set up to four through the quantity with couple 143, and four couples 143 set up along shell 110's circumference looks interval, set up with corresponding two wire rope 142, make the both ends of every wire rope 142 equally divide respectively with couple 143 fixed connection, thereby restrict the removal of connecting piece 1411 and inner bag 120 completely, make inner bag 120 completely fixed relative to shell 110, prevent that dewar 100 in the transportation inner bag 120 from taking place to rock or remove relative to shell 110, safety and reliability have been promoted, the evaporation rate of cryogenic liquids has been reduced. Of course, the number of the hooks 143 may also be six, eight or more, so as to correspond to three, four or more steel cables 142, and further completely fix the inner container 120 relative to the outer shell 110, so as to further improve safety and reliability, and further reduce the evaporation rate of the cryogenic liquid.

As shown in fig. 5, in the above embodiment of the application, optionally, the connecting piece 1411 is provided with a third through hole 14111, and one end of the fastening piece 1412 penetrates through the third through hole 14111 and is fixedly connected with the connecting piece 1411.

In this embodiment, the connecting piece 1411 is provided with a third through hole 14111, so that one end of the fastening piece 1412 can penetrate through the third through hole 14111 and is fixedly connected with the connecting piece 1411. Specifically, the hole wall of the third through hole 14111 is provided with an internal thread, and one end of the fastening piece 1412 is provided with an external thread matched with the internal thread of the hole wall of the third through hole 14111, so that stable connection is realized, connection stability is improved, and safety and reliability are improved.

In the above embodiments of the present application, optionally, the diameter of the steel wire rope 142 is 2-5mm.

In this embodiment, through setting up wire rope 142's diameter between 2mm to 5mm, make wire rope 142 have when sufficient intensity like this, can also reduce heat-conduction to the greatest extent, promoted stability and heat preservation effect.

As shown in fig. 4, 5, 6 and 7, in an embodiment of the present application, optionally, the dewar 100 further includes an insertion device 150, the insertion device 150 includes a cover plate 151, a screw 152 and a nut 153, the cover plate 151 is sleeved on a top of the screw 152, a bottom surface of the cover plate 151 abuts against a top surface of the neck tube 130, the nut 153 is fixedly disposed on a bottom of the inner container 120, and the screw 152 is inserted into the neck tube 130 and connected with the nut 153.

In this embodiment, the cover plate 151 is sleeved on the top of the screw 152, and the bottom surface of the cover plate 151 is disposed to abut against the top surface of the neck tube 130, so as to achieve the sealing connection between the insertion device 150 and the neck tube 130, and prevent the low-temperature liquid in the inner container 120 from evaporating and leaking.

Specifically, through the bottom at inner bag 120 sets firmly a nut 153, the mode that sets firmly can be for the welding, the screw rod 152 wears to locate neck 130 and nut 153 spiro union, and the top of screw rod 152 can be through fixed clamp and shell 110 fixed connection to increase being connected between inner bag 120 and the shell 110, effectively prevent that inner bag 120 from producing the displacement, rocking in transportation or removal in-process relative shell 110, thereby has promoted security and stability, has reduced the evaporation rate of cryogenic liquids.

It should be noted that before the dewar 100 is transported or moved, the dewar 100 is screwed and fixed with the nut 153 at the bottom of the inner container 120 by the inserting device 150, and the top is fixedly connected with the outer shell 110 by the fixing clip, so as to increase the connection between the inner container 120 and the outer shell 110. The whole inserting device 150 can be dismounted after the dewar 100 is transported or moved, and the dismounting and the mounting are convenient. The insertion device 150 is simple in manufacturing process, convenient to install and detach and capable of being recycled, and the insertion device 150 is made of a material with a small heat conductivity coefficient, so that heat conduction of the Dewar 100 cannot be increased.

Illustratively, the type of the nut 153 may be M60, and the screw 152 may be composed of M60 bolts at both ends and a connecting steel pipe in the middle.

As shown in fig. 6 and fig. 7, in the above embodiment of the present application, optionally, the insertion device 150 further includes a limiting silicone plug 154 and a fixing ring 155, the limiting silicone plug 154 and the fixing ring 155 are both sleeved around the screw 152, the fixing ring 155 is located at the bottom of the limiting silicone plug 154, and an outer diameter of the limiting silicone plug 154 is adapted to an inner diameter of the neck tube 130.

In this embodiment, through establishing the circumference at screw rod 152 with spacing silica gel stopper 154 cover, and the external diameter of spacing silica gel stopper 154 and the inner diameter looks adaptation of neck 130, play the effect of location and direction, do benefit to screw rod 152 and nut 153 spiro union fast accurately, promoted installation effectiveness to spacing silica gel stopper 154 can also prevent that screw rod 152 from rocking, has promoted stability. The fixing ring 155 is arranged at the bottom of the limit silicone plug 154 to limit the movement of the limit silicone plug 154, so that the limit silicone plug 154 is prevented from sliding into the inner container 120.

As shown in fig. 6 and 7, in the above embodiment of the present application, optionally, the insertion device 150 further includes a cap 156 and a sealing member 157, the cap 156 is sleeved on the top of the screw 152, a bottom surface of the cap 156 abuts against a top surface of the cover plate 151, and the sealing member 157 is disposed between the cap 156 and the cover plate 151.

In the present embodiment, by providing the cap 156 on the top of the screw 152, and abutting the bottom surface of the cap 156 against the top surface of the cover plate 151, and providing the sealing member 157 between the cap 156 and the cover plate 151, the cover plate 151 and the cap 156 can be hermetically connected, and the low-temperature liquid can be effectively prevented from evaporating and leaking through the gap between the screw 152 and the cover plate 151. Illustratively, the seal 157 may be an O-ring seal.

As shown in fig. 6 and 7, in the above embodiment of the present application, optionally, at least two limiting silicone plugs 154 are provided, and the two limiting silicone plugs 154 are provided at intervals along the axial direction of the screw 152.

In this embodiment, set up to two at least through with spacing silica gel stopper 154, and two spacing silica gel stoppers 154 set up along screw rod 152's axial looks interval to further promote location and guide effect, further prevent that screw rod 152 from taking place to rock, thereby further promoted security and stability.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended 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.

Claims

1. A dewar, comprising:

the top of the shell is provided with a first through hole;

2. The dewar according to claim 1, wherein the connecting device comprises a connecting component, a steel wire rope and a hook, the steel wire rope is respectively connected with the connecting component and the hook, the connecting component is fixedly connected with the bottom of the inner container, and the hook is fixedly connected with the bottom of the outer shell.

3. The dewar according to claim 2, wherein the connecting assembly comprises a connecting member and a fastener, the connecting member is respectively fixedly connected with the fastener and the bottom of the inner container, the fastener is provided with a limiting slot adapted to the steel wire rope, two ends of the steel wire rope are respectively fixedly connected with the hook, and a part of the steel wire rope is arranged in the limiting slot.

4. The dewar according to claim 3, wherein at least two limiting slots and at least two steel wire ropes are provided, the two limiting slots are provided to cross each other, and the two steel wire ropes are provided to cross each other.

5. The dewar according to claim 4, wherein said hooks are provided in at least four, said four hooks being provided at intervals along a circumferential direction of said shell.

6. The dewar according to claim 3, wherein the connecting piece is provided with a third through hole, and one end of the buckle piece is arranged through the third through hole and fixedly connected with the connecting piece.

7. Dewar according to claim 2, wherein the wire rope has a diameter of 2-5mm.

8. The dewar according to claim 1, further comprising an insertion device, wherein the insertion device comprises a cover plate, a screw rod and a nut, the cover plate is sleeved on the top of the screw rod, the bottom surface of the cover plate abuts against the top surface of the neck tube, the nut is fixedly arranged on the bottom of the inner container, and the screw rod is arranged in the neck tube in a penetrating manner and connected with the nut.

9. The dewar according to claim 8, wherein the inserting device further comprises a limiting silica gel plug and a fixing ring, the limiting silica gel plug and the fixing ring are both sleeved on the circumference of the screw rod, the fixing ring is located at the bottom of the limiting silica gel plug, and the outer diameter of the limiting silica gel plug is matched with the inner diameter of the neck tube.

10. The dewar according to claim 8, wherein the inserting device further comprises a cap and a sealing member, wherein the cap is sleeved on the top of the screw rod, the bottom surface of the cap abuts against the top surface of the cover plate, and the sealing member is disposed between the cap and the cover plate.