CN209688503U - A kind of low-temperature storage tank having axial load-bearing and limit function - Google Patents

Abstract

The utility model discloses a kind of low-temperature storage tanks for having axial load-bearing and limit function, belong to liquefied gas at low temp storage and transportation field, including inner pressurd vessel, shell, fixed part and sliding part；The inner pressurd vessel two sides pass through fixed part and sliding part axial direction frame inside the shell respectively；The fixed part keeps inner pressurd vessel and shell spacing constant；The sliding part keeps inner pressurd vessel and shell spacing variable；The cover board that the shell two sides are respectively equipped with the capping end socket for sealing fixed part and seal sliding part.Due to the structure, avoid destroying due to inner pressurd vessel stress raisers caused by low-temperature shrink.

Description

A kind of low-temperature storage tank having axial load-bearing and limit function

Technical field

The utility model belongs to liquefied gas at low temp storage and transportation field, relates in particular to one kind and has axial load-bearing and limit The low-temperature storage tank of function.

Background technique

With the extensive use of the liquefied gas at low temp such as liquefied natural gas, liquid nitrogen, liquid oxygen, cryogenic liquid storage tank is as liquefaction The important equipment of gas, there is vast market prospect.

Existing low-temperature storage tank inner pressurd vessel is destroyed because of the stress raisers that low-temperature shrink is be easy to cause.

Summary of the invention

The purpose of this utility model is to provide a kind of to have the low of axial load-bearing and limit function in view of the above shortcomings Warm storage tank intends to solve that existing low-temperature storage tank inner pressurd vessel destroys problem because of the stress raisers that low-temperature shrink is be easy to cause.For Realize above-mentioned purpose, the utility model provides the following technical solutions:

A kind of low-temperature storage tank having axial load-bearing and limit function, including inner pressurd vessel 1, shell 2, fixed part 3 and sliding Portion 4；1 two sides of inner pressurd vessel pass through fixed part 3 and the axial frame of sliding part 4 in shell 2 respectively；The fixed part 3 makes content Device 1 and 2 spacing of shell are constant；The sliding part 4 keeps inner pressurd vessel 1 and 2 spacing of shell variable；2 two sides of shell are respectively equipped with The capping end socket 31 for sealing fixed part 3 and the cover board 41 for sealing sliding part 4.

Further, the fixed part 3 and sliding part 4 include the inner pressurd vessel support 11 for being fixed on 1 side of inner pressurd vessel, consolidate The Casing supports 21 and both ends for being scheduled on 2 interior side of shell are sheathed on respectively in the inner and outer shell support 21 of inner pressurd vessel support 11 Axial support 5；The inner pressurd vessel support 11 forms clip cavity 12 with 1 side of inner pressurd vessel；21 both ends open of Casing supports；It is described Axial support 5 is hollow class cylindrical body；The fixed part 3 further include be fixed on Casing supports 21 it is open at one end on limit plate 32 and locking device 33；The axial direction that the locking device 33 makes limit plate 32 and inner pressurd vessel support 11 be tightly attached to fixed part 3 supports 5 Both ends.

Further, the locking device 33 includes that two axial support in 5 for being set to fixed part 3 are separately fixed at limit Position plate 32 and the bolt 34 on inner pressurd vessel support 11, connecting cylinder 35 that two bolts 34 are connected；The connecting cylinder 35 and spiral shell Mat insulation 36 is equipped between bolt 34.

Further, there is spacing between the axial support 5 and cover board 41 of the sliding part 4.

Further, it is equipped with through-hole on the axial support 5, inner pressurd vessel support 11 and limit plate 32, makes inner pressurd vessel 11 Interlayer between shell 21 is connected to inside clip cavity 12, axial support 5, inside capping end socket 31.

Further, 1 two sides of inner pressurd vessel are equipped with inner pressurd vessel backing plate 13, are used for after 1 two sides of inner pressurd vessel thicken and content Device support 11 is fixed；The 2 inside two sides of shell are equipped with shell backing plate 22, are used for after 2 inside two sides of shell thicken and shell branch Seat 21 is fixed；Reinforcing rib is equipped with around the inner pressurd vessel support 11 and Casing supports 21.

Further, diameter of the axial support 5 close to 11 one end of inner pressurd vessel support is less than close to Casing supports 21 1 The diameter at end.

Further, the shell 2 is equipped with vacuum and obtains valve 23, for extracting interlayer between inner pressurd vessel 1 and shell 2 Vacuum；The axial support 5 is heat-insulating material；1 outer surface of inner pressurd vessel is coated with Anti-radiation heat insulation layer, described anti-radiation exhausted Gap is kept between thermosphere and shell 2.

It further, further include explosion-protection equipment 6；The explosion-protection equipment 6 include sealed explosion-proof seat 61, sealed explosion-proof plug 62, Sealing ring 63, Explosion-proof cap 64 and screw 65；In the 61 lower end fixing shell 2 of sealed explosion-proof seat, and with shell 2 and inner pressurd vessel 1 Between interlayer be connected；The upper end of the sealed explosion-proof seat 61 can fill in sealed explosion-proof plug 62；On the sealed explosion-proof plug 62 Equipped with seal groove 66, the seal groove 66 is equipped with sealing ring 63；61 side of sealed explosion-proof seat is equipped with groove 67；It is described anti- Quick-fried 64 lower ending opening of lid, and its lower ending opening diameter is greater than the diameter of sealed explosion-proof seat 61, and is supported on groove by screw 65 On 67.

It further, further include rotation-preventing mechanism 8；The rotation-preventing mechanism 8 includes stop pin 81, pedestal 82, stop sleeve 83 With two guide plates 84；The stop sleeve 83 is welded on inner pressurd vessel 1, and to 1 internal stretch of inner pressurd vessel；The stop sleeve 83 one end inside inner pressurd vessel 1 is fixed with pedestal 82；The pedestal 82 is equipped with the stop pin 81 across stop sleeve 83； 81 other end of stop pin limits rotation by being fixed on two guide plates 84 of 2 inner surface of shell；Described two guide plates 84 are parallel to 1 axle center of inner pressurd vessel, form axial channel 85；There is gap between the stop pin 81 and stop sleeve 83.

The beneficial effects of the utility model are:

1. low-temperature storage tank inner pressurd vessel 1 load cryogenic media cause 1 axial shrinkage of inner pressurd vessel when, inner pressurd vessel 1 it is another The cover board 41 held and closed on can occur to be displaced carry out bit shift compensation to axial, avoid inner pressurd vessel 1 because of office caused by low-temperature shrink Portion's stress is concentrated and destroys structure.

2. being transmitted to the gravitational load of inner pressurd vessel 1 and medium on shell 2 by axial support 5；This kind axially tie by support Structure is compared with using the low-temperature storage tank of steel suspender belt or radial support structure, and gap reduces between shell 2 and inner pressurd vessel 1, is protecting Card can obtain under the requirement of excellent heat-insulating property, and gentlier, outer dimension is smaller, reduce material cost, reduce leakage heat, reduce branch Support assembly technology difficulty and workload.

3. locking device 33 can ensure that inner pressurd vessel 1 is integrated always with shell 2, inner pressurd vessel 1 one will not be made because of low-temperature shrink End generates relative displacement with shell 2 and destroys vacuum interlayer pipeline 91, also 1 inertia of inner pressurd vessel will not be made to make because of transport acceleration or deceleration Inertial load destruction structure is generated to shell 2 with lower.

4. the low-temperature storage tank of double-layer structure form is high vacuum interlayer, resistance between the low-temperature storage tank shell 2 and inner pressurd vessel 1 The cross-ventilation heat transfer between shell 2 and inner pressurd vessel 1 is stopped；1 outer surface of inner pressurd vessel is coated with Anti-radiation heat insulation layer, specific thicknesses Anti-radiation heat insulation layer prevent the radiant heat transfer of inner pressurd vessel 1 and shell 2 and the external world；The low-temperature storage tank of this kind of structure has excellent Heat-insulating property, can for a long time effectively store cryogenic media, improve medium service efficiency.

Detailed description of the invention

Fig. 1 is the low-temperature storage tank overall schematic of the utility model；

Fig. 2 is the fixing part structure schematic diagram of the utility model；

Fig. 3 is the sliding part structural schematic diagram of the utility model；

Fig. 4 is the rotation-preventing mechanism structural schematic diagram of the utility model；

Fig. 5 is the explosion-protection equipment structural schematic diagram of the utility model；

Fig. 6 is the explosion-protection equipment outside schematic diagram of the utility model；

In attached drawing: 1- inner pressurd vessel, 11- inner pressurd vessel support, 12- clip cavity, 13- inner pressurd vessel backing plate, 2- shell, 21- shell branch Seat, 22- shell backing plate, 23- vacuum obtain valve, 3- fixed part, 31- capping end socket, 32- limit plate, 33- locking device, 34- spiral shell The axial support of bolt, 35- connecting cylinder, 36- mat insulation, 4- sliding part, 41- cover board, 5-, 6- explosion-protection equipment, 61- sealed explosion-proof seat, 62- sealed explosion-proof plug, 63- sealing ring, 64- Explosion-proof cap, 65- screw, 66- seal groove, 67- groove, 8- rotation-preventing mechanism, 81- are anti- Ship and resell on another market, 82- pedestal, 83- stop sleeve, 84- guide plate, 85- axial channel, 9- saddle, 91- Sandwich pipeline, 68- guide angle, The 69- conical surface, 60- threaded hole.

Specific embodiment

With reference to the accompanying drawing with specific embodiment, the utility model is further described, but the utility model It is not limited to following embodiment.

See attached drawing 1 ~ 6.A kind of low-temperature storage tank having axial load-bearing and limit function, including inner pressurd vessel 1, shell 2, fixation Portion 3 and sliding part 4；1 two sides of inner pressurd vessel pass through fixed part 3 and the axial frame of sliding part 4 in shell 2 respectively；The fixation Portion 3 keeps inner pressurd vessel 1 and 2 spacing of shell constant；The sliding part 4 keeps inner pressurd vessel 1 and 2 spacing of shell variable；2 two sides of shell The cover board 41 for being respectively equipped with the capping end socket 31 for sealing fixed part 3 and sealing sliding part 4.

Due to above structure, the gravitational load of inner pressurd vessel 1 and medium is transmitted to shell 2 by fixed part 3 and sliding part 4 On, fixed part 3 can make one end of inner pressurd vessel 1 and the capping end socket 31 closed on that relative displacement not occur, and sliding part 4 can make inner pressurd vessel 1 other end can occur to be displaced to axial with the cover board 41 closed on；Cryogenic media is loaded in the inner pressurd vessel 1 of low-temperature storage tank to cause When 1 axial shrinkage of inner pressurd vessel, the other end of inner pressurd vessel 1 can occur to be displaced to axial with the cover board 41 closed on carries out displacement benefit It repays, avoids destroying structure due to the stress raisers caused by low-temperature shrink of inner pressurd vessel 1.It, can if low-temperature storage tank needs depot repair It directly cuts capping end socket 31 or cover board 41 dismantles inner pressurd vessel 1, carry out replacement heat-insulating material or Sandwich pipeline 91；Reduce maintenance or The difficulty of maintenance and the workload for reducing maintenance disassembly storage tank；Low-temperature storage tank further includes two saddles 9；Described two saddles 9 divide It is not supported on the left and right sides of 2 lower section of shell；The side saddle 9 is equipped with bolt and installs circular hole, and other side saddle is equipped with Bolt installs waist round hole.

The fixed part 3 and sliding part 4 include the inner pressurd vessel support 11 for being fixed on 1 side of inner pressurd vessel, are fixed on shell 2 The Casing supports 21 of interior side and both ends are sheathed on the axial support in the inner and outer shell support 21 of inner pressurd vessel support 11 respectively 5；The inner pressurd vessel support 11 forms clip cavity 12 with 1 side of inner pressurd vessel；21 both ends open of Casing supports；The axial support 5 be hollow class cylindrical body；The fixed part 3 further include be fixed on Casing supports 21 it is open at one end on limit plate 32 and locking Device 33；The axial direction that the locking device 33 makes limit plate 32 and inner pressurd vessel support 11 be tightly attached to fixed part 3 supports 5 both ends.

It is axial that 5 both ends is supported to be sheathed in the inner and outer shell support 21 of inner pressurd vessel support 11 respectively due to above structure, pass through Axial support 5 is transmitted to the gravitational load of inner pressurd vessel 1 and medium on shell 2；This kind of axial support structure is hung with using steel Band or the low-temperature storage tank of radial support structure are compared, and gap reduces between shell 2 and inner pressurd vessel 1, excellent guaranteeing to obtain Under the requirement of heat-insulating property, than steel sling structure low-temperature storage tank or radial support structure the low temperature storage of identical geometric volume Tank accomplishes that gentlier outer dimension is smaller, and shell 2 uses less steel, reduces material cost；Support heat-transfer path is hung by steel Band heat transfer or radial support heat transfer become axial support heat transfer, and the structure is thermally conductive smaller than the steel suspender belt of co-content storage tank, than The supported amount that radial support (usual 8) uses is few, not only can be reduced leakage heat, moreover it is possible to which the support assembly technology for reducing storage tank is difficult Degree and workload；5 materials of axial support are fiber glass epoxy, and the axial support 5 of expoxy glass steel material has excellent insulation Performance；Axial support 5 is hollow class cylindrical body, and under the premise of proof strength, leaking heat is reduced to neglect hollow structure Slightly magnitude；Inner pressurd vessel support 11 and 1 side of inner pressurd vessel form clip cavity 12, are for the ease of becoming the cambered surface of 1 one end of inner pressurd vessel Plane is corresponding with 5 one end of axial support；21 both ends open of Casing supports protrudes into convenient for axial support 5 from 21 one end of Casing supports It places；The locking device 33 makes limit plate 32 and inner pressurd vessel support 11 be tightly attached to 5 both ends of axial support of fixed part 3, realizes Relative displacement does not occur for one end of inner pressurd vessel 1 and the capping end socket 31 closed on.

The locking device 33 includes that two axial support in 5 for being set to fixed part 3 are separately fixed at 32 He of limit plate Bolt 34 on inner pressurd vessel support 11, the connecting cylinder 35 that two bolts 34 are connected；Between the connecting cylinder 35 and bolt 34 Equipped with mat insulation 36.

Due to above structure, the bolt 34 being fixed on limit plate 32 uses double nut tightening, and spot welding is locking anti-after tightening Abjection；It is fixed on the locking Anti-extrusion of spot welding after 34 tightening of bolt on inner pressurd vessel support 11；The connecting cylinder 35 and bolt 34 it Between be equipped with mat insulation 36, while proof strength, can effectively reduce bolt 34 heat transfer, make its control in allowed band；Outside Capping end socket 31 on the shell 2 in 21 outside of shell support forms the closed cavity of interlayer；It is set between the inner pressurd vessel 1 and shell 2 There is Sandwich pipeline 91, cryogenic media can be stored in inner pressurd vessel 1 or convey from inside to outside from inner pressurd vessel 1 by the Sandwich pipeline 91； In transportational process and use process, locking device 33 can ensure that inner pressurd vessel 1 is integrated always with shell 2, will not receive because of low temperature Contracting makes 1 one end of inner pressurd vessel and shell 2 generate relative displacement destruction vacuum interlayer pipeline 91, will not also make because of transport acceleration or deceleration Inertial load is generated to shell 2 under 1 effect of inertia of inner pressurd vessel and destroys structure.

There is spacing between the axial support 5 of the sliding part 4 and cover board 41.It is loaded in the inner pressurd vessel 1 of low-temperature storage tank low When warm medium causes 1 axial shrinkage of inner pressurd vessel, the other end of inner pressurd vessel 1 and the cover board 41 closed on can occur to be displaced to axial into Row bit shift compensation avoids destroying structure due to the stress raisers caused by low-temperature shrink of inner pressurd vessel 1.

Be equipped with through-hole on the axial support 5, inner pressurd vessel support 11 and limit plate 32, make inner pressurd vessel 11 and shell 21 it Between interlayer and clip cavity 12, be connected to inside axial support 5, inside capping end socket 31.Through-hole make inner pressurd vessel 11 and shell 21 it Between interlayer and clip cavity 12, be connected to inside axial support 5, inside capping end socket 31, can be effective when product is vacuumized Exclude the air inside clip cavity 12,5 inside of axial support and capping end socket 31, it is ensured that support construction meets vacuum technology acquisition Technique requirement avoids unreasonable support construction from influencing vacuum acquisition and the vacuum life of product.

1 two sides of inner pressurd vessel are equipped with inner pressurd vessel backing plate 13, solid with inner pressurd vessel support 11 after thickening for 1 two sides of inner pressurd vessel It is fixed；The 2 inside two sides of shell are equipped with shell backing plate 22, fixed with Casing supports 21 after thickening for 2 inside two sides of shell；Institute It states and is equipped with reinforcing rib around inner pressurd vessel support 11 and Casing supports 21.Inner pressurd vessel backing plate 13 thicken 1 two sides of inner pressurd vessel, radian with it is interior 1 two sides of container are consistent, and 22 thickening casing of shell backing plate, 2 inside two sides, radian is consistent with 2 inside two sides of shell, reduce support and produce Raw stress, enhances inner pressurd vessel 1 and 2 ability to bear of shell, and reinforcing rib increases the reliability of support construction.

Diameter of the axial support 5 close to 11 one end of inner pressurd vessel support is less than the diameter close to 21 one end of Casing supports. Placement is protruded into from 21 one end of Casing supports convenient for axial support 5, is finely adjusted, larger diameter end and the cambered transition of smaller diameter end.

The shell 2 is equipped with vacuum and obtains valve 23, for interlayer between inner pressurd vessel 1 and shell 2 to be extracted vacuum；It is described Axial support 5 is heat-insulating material；1 outer surface of inner pressurd vessel is coated with Anti-radiation heat insulation layer, the Anti-radiation heat insulation layer and outer Gap is kept between shell 2.The low-temperature storage tank of double-layer structure form presss from both sides between the low-temperature storage tank shell 2 and inner pressurd vessel 1 for high vacuum Layer, prevents the cross-ventilation between shell 2 and inner pressurd vessel 1 to conduct heat；1 outer surface of inner pressurd vessel is coated with Anti-radiation heat insulation layer, special The Anti-radiation heat insulation layer for determining thickness prevents the radiant heat transfer of inner pressurd vessel 1 and shell 2 and the external world；The low-temperature storage tank tool of this kind of structure There is excellent heat-insulating property, can effectively store cryogenic media for a long time, improve medium service efficiency.5 materials of the axial support Axial support 5 for fiber glass epoxy, expoxy glass steel material has excellent heat-insulating property.The Anti-radiation heat insulation layer is resistance The heat-insulating material that combustion type glass fibre matter and aluminium foil are combined.

The present apparatus further includes explosion-protection equipment 6；The explosion-protection equipment 6 includes sealed explosion-proof seat 61, sealed explosion-proof plug 62, sealing Circle 63, Explosion-proof cap 64 and screw 65；In the 61 lower end fixing shell 2 of sealed explosion-proof seat, and between shell 2 and inner pressurd vessel 1 Interlayer be connected；The upper end of the sealed explosion-proof seat 61 can fill in sealed explosion-proof plug 62；The sealed explosion-proof plug 62 is equipped with Seal groove 66, the seal groove 66 are equipped with sealing ring 63；61 side of sealed explosion-proof seat is equipped with groove 67；The Explosion-proof cap 64 lower ending openings, and its lower ending opening diameter is greater than the diameter of sealed explosion-proof seat 61, and is supported on groove 67 by screw 65. In the 61 lower end fixing shell 2 of sealed explosion-proof seat, and the interlayer between shell 2 and inner pressurd vessel 1 is connected；The sealing is anti- The upper end of quick-fried seat 61 can fill in sealed explosion-proof plug 62；The sealed explosion-proof plug 62 is equipped with seal groove 66, on the seal groove 66 Equipped with sealing ring 63；62 meeting of sealed explosion-proof plug when leakage, which occurs, in inner pressurd vessel 1 causes interlayer superpressure, in explosion-protection equipment 6 Over-pressure gas is discharged rapidly for automatic spring, avoids cryogenic liquid storage tank shell 2 because superpressure damages, also avoids simultaneously 2 superpressure explosion of shell causes more huge economic loss；61 side of sealed explosion-proof seat is equipped with groove 67；Under the Explosion-proof cap 64 End opening, and its lower ending opening diameter is greater than the diameter of sealed explosion-proof seat (61), and is supported on groove 67 by screw 65；It is anti- Sealed explosion-proof plug 62 can be popped up all when the design size of quick-fried lid 64 can ensure that superpressure, so that the amount of releasing is reached maximum, while can be true The sealed explosion-proof plug 62 for protecting pop-up is just stored in Explosion-proof cap 64.The 61 upper end inner surface of sealed explosion-proof seat is equipped with guide angle 68；62 upper end of sealed explosion-proof plug is equipped with the conical surface 69 that can be matched with guide angle 68.62 upper surface of sealed explosion-proof plug Threaded hole 60 equipped with certain depth.The seal groove 66 and sealing ring 63 are two.The sealing ring 63 is O-shaped sealing Circle.

The present apparatus further includes rotation-preventing mechanism 8；The rotation-preventing mechanism 8 includes stop pin 81, pedestal 82, stop sleeve 83 and two A guide plate 84；The stop sleeve 83 is welded on inner pressurd vessel 1, and to 1 internal stretch of inner pressurd vessel；The stop sleeve 83 leans on One end inside nearly inner pressurd vessel 1 is fixed with pedestal 82；The pedestal 82 is equipped with the stop pin 81 across stop sleeve 83；It is described 81 other end of stop pin limits rotation by being fixed on two guide plates 84 of 2 inner surface of shell；Described two guide plates 84 are flat Row forms axial channel 85 in 1 axle center of inner pressurd vessel；There is gap between the stop pin 81 and stop sleeve 83.Rotation-preventing mechanism 8 It prevents inner pressurd vessel 1 from occurring rotating and increase Sandwich pipeline 91 additional load, avoids 91 failure damage of Sandwich pipeline；Rotation-preventing mechanism 8 pedestals 82 are equipped with the stop pin 81 across stop sleeve 83；81 other end of stop pin is by being fixed on 2 inner surface of shell Two guide plates 84 limit rotation；5 are supported to rotate for shaft opposite shell 2 to limit inner pressurd vessel 1 with axial with this；Described two A guide plate 84 is parallel to 1 axle center of inner pressurd vessel, forms axial channel 85；Inner pressurd vessel 1 is in low-temperature shrink, inner pressurd vessel 1 and shell 2 Between will generate relative displacement, axial channel 85 allows inner pressurd vessel 1 to slide axially, without being hindered by stop pin 81；Reach limit Inner pressurd vessel 1 processed rotates, allows the effect in axial sliding of inner pressurd vessel 1, and the stress that low temperature generates can be discharged；The stop sleeve 83 are welded on inner pressurd vessel 1, and to 1 internal stretch of inner pressurd vessel；Using the structure built in stop sleeve 83, the built-in structure Reduce the conduction heat of stop pin 81 primarily to realizing and extending thermally conductive pathways；In addition it under the premise of proof strength, can design The stop sleeve 83 of different length size, i.e. 81 effective path of stop pin be not by 1 gap size shadow of shell 2 and inner pressurd vessel It rings, 81 length of stop pin can be controlled by design requirement；There is gap between the stop pin 81 and stop sleeve 83；The support Sleeve 83 is stainless steel material, stop pin 81 is expoxy glass steel material, thermally conductive small, is devised between them between certain size Gap prevents direct contact heat transfer between stop pin 81 and stop sleeve 83, improves the insulation effect of equipment.Stop pin 81 is hollow Class cylindrical body.Reinforcing rib is fixed with around the stop sleeve 83.Reinforcing rib is fixed on the outside of the guide plate 84.

The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model, Equivalent structure or equivalent flow shift made by using the description of the utility model and the drawings, is directly or indirectly transported Used in other related technical areas, it is also included in the patent protection scope of the utility model.

Claims (10)

1. a kind of low-temperature storage tank for having axial load-bearing and limit function, which is characterized in that including inner pressurd vessel (1), shell (2), Fixed part (3) and sliding part (4)；Inner pressurd vessel (1) two sides pass through fixed part (3) and the axial frame of sliding part (4) outside respectively In shell (2)；The fixed part (3) keeps inner pressurd vessel (1) and shell (2) spacing constant；The sliding part (4) make inner pressurd vessel (1) with Shell (2) spacing is variable；Shell (2) two sides are respectively equipped with the capping end socket (31) for sealing fixed part (3) and make to slide The cover board (41) of portion (4) sealing.

2. a kind of low-temperature storage tank for having axial load-bearing and limit function according to claim 1, which is characterized in that described Fixed part (3) and sliding part (4) include the inner pressurd vessel support (11) for being fixed on inner pressurd vessel (1) side, are fixed in shell (2) The Casing supports (21) of portion side and both ends are sheathed on the axial direction in the inner and outer shell support (21) of inner pressurd vessel support (11) respectively It supports (5)；The inner pressurd vessel support (11) and inner pressurd vessel (1) side form clip cavity (12)；It opens at Casing supports (21) both ends Mouthful；The axial support (5) is hollow class cylindrical body；The fixed part (3) further includes being fixed on Casing supports (21) one end Limit plate (32) and locking device (33) in opening；The locking device (33) makes limit plate (32) and inner pressurd vessel support (11) It is tightly attached to axial support (5) both ends of fixed part (3).

3. a kind of low-temperature storage tank for having axial load-bearing and limit function according to claim 2, which is characterized in that described Locking device (33) includes that two axial support in (5) for being set to fixed part (3) are separately fixed at limit plate (32) and content Bolt (34) on device support (11), the connecting cylinder (35) that two bolts (34) are connected；The connecting cylinder (35) and bolt (34) mat insulation (36) are equipped between.

4. a kind of low-temperature storage tank for having axial load-bearing and limit function according to claim 3, which is characterized in that described There is spacing between the axial support (5) of sliding part (4) and cover board (41).

5. a kind of low-temperature storage tank for having axial load-bearing and limit function according to claim 4, which is characterized in that described It is equipped with through-hole on axial support (5), inner pressurd vessel support (11) and limit plate (32), is made between inner pressurd vessel (1) and shell (2) It is connected to inside interlayer and clip cavity (12), axial support (5) inside, capping end socket (31).

6. a kind of low-temperature storage tank for having axial load-bearing and limit function according to claim 5, which is characterized in that described Inner pressurd vessel (1) two sides are equipped with inner pressurd vessel backing plate (13), fixed with inner pressurd vessel support (11) after thickening for inner pressurd vessel (1) two sides； The internal two sides of the shell (2) are equipped with shell backing plate (22), solid with Casing supports (21) after thickening for shell (2) internal two sides It is fixed；Reinforcing rib is equipped with around the inner pressurd vessel support (11) and Casing supports (21).

7. a kind of low-temperature storage tank for having axial load-bearing and limit function according to claim 2, which is characterized in that described Diameter of the axial support (5) close to inner pressurd vessel support (11) one end is less than the diameter close to Casing supports (21) one end.

8. a kind of low-temperature storage tank for having axial load-bearing and limit function, feature according to one of claim 2~7 exist In the shell (2) is equipped with vacuum and obtains valve (23), for interlayer between inner pressurd vessel (1) and shell (2) to be extracted vacuum； The axial support (5) is heat-insulating material；Inner pressurd vessel (1) outer surface is coated with Anti-radiation heat insulation layer, described anti-radiation exhausted Gap is kept between thermosphere and shell (2).

9. a kind of low-temperature storage tank for having axial load-bearing and limit function, feature described according to claim 1~one of 7 exist In further including explosion-protection equipment (6)；The explosion-protection equipment (6) includes sealed explosion-proof seat (61), sealed explosion-proof plug (62), sealing ring (63), Explosion-proof cap (64) and screw (65)；On sealed explosion-proof seat (61) the lower end fixing shell (2), and with shell (2) and interior Interlayer between container (1) is connected；The upper end of the sealed explosion-proof seat (61) can fill in sealed explosion-proof plug (62)；The sealing Explosion-proof plug (62) is equipped with seal groove (66), and the seal groove (66) is equipped with sealing ring (63)；The sealed explosion-proof seat (61) Side is equipped with groove (67)；Explosion-proof cap (64) lower ending opening, and its lower ending opening diameter is greater than sealed explosion-proof seat (61) Diameter, and be supported on groove (67) by screw (65).

10. a kind of low-temperature storage tank for having axial load-bearing and limit function, feature described according to claim 1~one of 7 It is, further includes rotation-preventing mechanism (8)；The rotation-preventing mechanism (8) include stop pin (81), pedestal (82), stop sleeve (83) and Two guide plates (84)；The stop sleeve (83) is welded on inner pressurd vessel (1), and to inner pressurd vessel (1) internal stretch；The branch Support set cylinder (83) is fixed with pedestal (82) close to inner pressurd vessel (1) internal one end；The pedestal (82) is equipped with across support sleeve The stop pin (81) of cylinder (83)；Stop pin (81) other end is by being fixed on two guide plates of shell (2) inner surface (84) limitation rotation；Described two guide plates (84) are parallel to inner pressurd vessel (1) axle center, are formed axial channel (85)；The anti-rotation There is gap between pin (81) and stop sleeve (83).