CN207438128U - A vertical cryogenic container - Google Patents

Abstract

The utility model relates to a vertical low temperature container, the main technical problem who solves is the vertical low temperature container among the prior art when storage temperature reaches the medium below-196 ℃, the problem that its bearing structure's heat-proof quality seriously descends. The utility model discloses a vertical low temperature container, including inner bag and shell, the inner bag top outside with be equipped with head axial support between the shell top inboard, the inner bag bottom outside with be equipped with the technical scheme that steel pipe glass steel supported between the shell bottom outside, solved this problem betterly, can be used to store the low temperature medium below-196 ℃.

Description

A vertical cryogenic container

technical field

The utility model specifically relates to a vertical cryogenic container.

Background technique

In the field of cryogenic technology, cryogenic liquids refer to gases that exist in liquid form below -160°C, such as liquid oxygen, liquid nitrogen, liquid argon, liquid hydrogen, liquid helium, liquid methane and LNG, etc., which are widely used in industrial production, hospitals and in daily life. A cryogenic liquid storage container is usually a double-layer structure composed of an inner tank 10 and an outer shell 1. There is a vacuum interlayer between the inner tank 10 and the outer shell 1. The stability of the inner container and the outer shell 1 is ensured by a suitable support structure, and the The heat conduction between the inner container and the external environment ensures the overall heat insulation effect of the cryogenic container; the vacuum service life of the cryogenic container is ensured by placing an adsorbent at a suitable position in the interlayer.

At present, in the existing vertical low-temperature liquid storage containers, the lower part of the inner container is mostly supported by side wall steel pipes or steel pipe glass fiber reinforced plastics, and the upper part is mostly supported by hoop horizontal tension belts or hoop glass fiber reinforced plastics to meet the requirements of work stability and transportation. In addition, the low-temperature liquid storage container connecting the inner container and the outer shell 1 with a cantilever support structure with slings or a combined support structure of glass fiber reinforced plastics and steel structures is also widely used, and the purpose is to achieve the overall structural stability of the container and ideal Low temperature insulation performance.

At present, in the field of cryogenic vessels with a design temperature not lower than -196°C, vertical cryogenic vessels with high-vacuum multi-layer insulation are mainly supported by steel pipe glass fiber reinforced plastics, and vertical cryogenic vessels in the form of vacuum powder insulation are mostly supported by steel pipes.

Another example is that the Chinese patent document CN101418906A discloses a vertical storage tank, comprising an inner tank 10, an outer tank and legs protruding from the surface of the outer tank, the bottom of the inner tank 10 is provided with an inner seal head, and the bottom of the outer tank is provided with a There is an outer head, and a support device co-linear with the legs is supported between the inner head and the outer head, and the support device includes a first support for supporting the inner head, a support for the The second supporting part of the outer head, and a heat insulating part with a certain strength installed between the two supporting parts. What is described is a support structure that uses a steel pipe and glass fiber reinforced plastics combination between the inner container and the outer container head. The board is fastened by bolts and fiberglass gaskets, so as to achieve the purpose of increasing the support strength and improving the thermal insulation performance. However, there is no vacuum interlayer between the inner leg and the outer leg, and there is still room for improvement in the heat transfer path; the sliding parts and reserved gap parts are still improved considering the lateral displacement caused by the thermal expansion and contraction of the inner container. space.

Another example is that the Chinese patent document CN204477678U discloses a low-temperature storage tank, which includes a body and a support arranged at the bottom of the body for supporting the body. The body includes an inner container, an inner container support device and an outer shell 1. The inner container There is a space between the casing 1, wherein the bottom of the casing 1 is provided with a through hole, the bottom end of the inner container supporting device passes through the through hole downwards, and the top end of the inner container supporting device is arranged on the within the compartment to support the inner container. The support structure it describes is supported by steel pipes on the side wall of the inner container cylinder, and the steel pipes on the side wall directly contact the bottom plate of the main body support of the shell 1 through the opening of the outer head, so that the support of the shell 1 communicates with the interlayer space, forming together Vacuum area, so as to achieve the effect of increasing the heat transfer path and improving the performance of vacuum insulation. However, due to the support of all steel structures, the support has large thermal conductivity and general low-temperature insulation performance. It is also stated in this patent that it cannot be applied to low-temperature storage tanks of high-vacuum multi-layer insulation type.

Another example is that the Chinese patent document CN204372547U discloses a vertical low-temperature pressure tank and its connection support structure. The vertical low-temperature pressure tank includes an inner tank body, an outer tank body and a connection support structure. The connection support structure includes an upper support structure, including A plurality of upper support units are evenly distributed along the outer circumferential surface of the inner tank, respectively including: a first upper connection part connected with the inner tank body; a second upper connection part connected with the first connection part and connected with the outer tank body connection; the adjusting part is arranged on the second connecting part and connected with the outer tank body; the lower support structure includes a plurality of lower support units which are evenly distributed along the outer circumferential surface of the inner tank and interlaced with the upper support units. Each of the lower support units includes: a first lower connection part connected to the inner tank body; a gap between the second lower connection part and the first lower connection part, connected to the first lower connection part and connected to the outer tank The body is connected; the supporting part is respectively connected with the first lower connecting part and the second lower connecting part. The support structure it describes is the upper (circumferential) FRP support, and the lower FRP support of the deck. When the container is filled with low-temperature medium, affected by the cold shrinkage of the inner container, the upper FRP support forms a gap with the outer wall of the inner container, and the lower support assembly Through its internal glass fiber reinforced plastic to form effective sliding, avoiding the occurrence of stress concentration phenomenon. This structure is an upgraded structure of the metal tree root tie connection described in its patent. Affected by the size of the lower support structure, it has certain requirements for the width of the vacuum interlayer between the inner and outer cylinders, and has requirements for the overall process and manufacturing of the equipment. It is relatively high, and its upper support has no FRP positioning and fastening devices. Due to the influence of the slope of the cylinder, in actual use, there may be permanent contact between the upper support FRP and the outer wall of the inner cylinder.

Utility model content

The technical problem to be solved by the utility model is that when the storage temperature of the vertical cryogenic container in the prior art reaches a medium below -196°C, the heat insulation performance of its supporting structure is seriously reduced. A new vertical cryogenic container is proposed. A vertical cryogenic container, the supporting structure of the vertical cryogenic container has the characteristics of good heat insulation performance.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is as follows: a vertical low-temperature container, including an inner tank and an outer shell, and an axial support is provided between the outer top of the inner tank and the inner top of the outer shell. A steel pipe fiberglass support is provided between the outside of the bottom of the liner and the outside of the bottom of the shell.

In the above technical solution, preferably, the axial support of the head includes an upper assembly and a lower assembly, the lower assembly includes a backing plate 1 fixed on the outer side of the top of the liner, and a supporting steel pipe 1 is connected to the backing plate 1, Two fixed rings are set up and down on the inner side of the supporting steel pipe, and an annular glass fiber reinforced plastic is clamped between the two fixed rings; the upper assembly includes an axial support piece that penetrates the fixed ring and the annular glass fiber reinforced plastic at one end, and the top of the shell is provided with A through hole fixed to the other end of the axial support, a sealing plate that seals the through hole is provided on the top of the outside of the housing, a support ring is fixed on the outside of the axial support, and the support ring passes through the support at the same time The steel pipe two is connected with the backing plate two fixed on the inside top of the shell.

Preferably, the steel pipe fiberglass support includes an inner leg connected to the outer side of the bottom of the inner tank, an outer leg connected to the outer side of the outer shell bottom, and auxiliary legs respectively connected to the inner leg and the outer leg. supporting item.

More preferably, the inner leg includes a steel pipe I connected to the outer side of the inner tank bottom through a backing plate three, and the other end of the steel pipe one is connected to the steel pipe two through flange one and flange two, and the flange one FRP is sandwiched between the two flanges, and the other end of the two steel pipes is connected to a connection plate, and the connection plate is connected to the bottom plate of the vacuum leg through a glass steel plate.

More preferably, the outer leg includes a steel pipe three located on the outer side of the steel pipe two and communicated with the inside of the casing and fixed to the bottom of the casing through a backing plate four, and the other end of the steel pipe three is connected to the vacuum through a steel pipe four Base plate for outriggers.

More preferably, the auxiliary support includes snap ring one welded on the outer side of the second steel pipe and second snap ring welded on the inner side of the third steel pipe.

More preferably, the flange 1 is provided with an insertion hole for placing the cold-side adsorbent inside the steel pipe 1, and the insertion hole is sealed by fixing the wire mesh and the ring flange to the flange 1, so that A plurality of vent holes are opened on the side wall of the steel pipe 1, and the vent holes are sealed by wire mesh.

More preferably, a steel pipe 5 is connected to the bottom of the bottom plate of the vacuum leg, and the other end of the steel pipe 5 is connected to a bottom plate.

More preferably, a vacuum cavity is formed between the inner leg and the outer leg.

The utility model is suitable for a vertical low-temperature liquid storage tank with a large volume, especially a liquid hydrogen storage tank;

The top support of the utility model adopts a combined support structure of a large-diameter thick-walled steel pipe and a glass fiber reinforced plastic ring, which meets the requirements of the transportation conditions of the large-tonnage storage tank and meets the requirements of the stability of the working state of the large-volume vertical storage tank;

The utility model is supplemented by a central ring support, which avoids the possible bending deformation of the inner container under the transportation condition of a super-long storage tank, and meets the design requirements of a storage tank with a relatively large height and diameter;

The support structure at the top of the inner container head of the utility model fully considers the characteristics of low cold energy and small heat transfer in the gas phase space of the container, and ensures the vacuum insulation performance of the tank body to the greatest extent on the premise of ensuring the stability of the tank body operation;

The lower support of the utility model adopts the vacuum outrigger with the dual combination structure of outrigger glass fiber reinforced plastics, which lengthens the heat transfer path, reduces the comprehensive heat transfer coefficient to the greatest extent, and reduces the static evaporation rate of the working medium to the greatest extent;

The utility model ensures that the thickness of the heat insulation layer of the main body of the equipment is reasonable and is suitable for the fitting process of the inner and outer tanks, and this structure has no limitation on the interlayer distance between the inner cylinder and the outer cylinder;

The utility model utilizes the bottom outrigger space to place macromolecular adsorbents, scientifically utilizes the physical properties of macromolecules with high density, makes full use of interlayer space and liquid phase cooling energy, ensures the service life of its vacuum design, and provides deflection and deformation after the interlayer bottom takes over the cold tank Coordinate and reserve enough space.

Description of drawings

Fig. 1 is the front view of a kind of vertical cryogenic vessel of the present utility model;

Fig. 2 is a partial schematic diagram 1 of a vertical cryogenic vessel of the present invention;

Fig. 3 is the top view of a kind of vertical cryogenic vessel of the present utility model:

Fig. 4 is a partial schematic diagram II of a vertical cryogenic vessel of the present invention;

In the attached picture:

1. Shell 2. Backing plate 2 3. Supporting steel pipe 2

4. Support ring 5. Axial support 6. Sealing plate

7. Fixed ring 8. Supporting steel pipe 1 9. Backing plate 1

10. Inner tank 11. Ring-shaped glass fiber reinforced plastic 14. Backing plate three

15. Steel pipe one 17. Flange one 18. FRP

19. Steel pipe two 21. Backing plate four 22. Steel pipe three

23. Steel pipe four 24. Snap ring two 26. Snap ring one

27. Vacuum outrigger bottom plate 28. Steel pipe five 29. Bottom plate

30. Glass steel plate 31. Connecting plate 36. Flange 2

40. Adsorbent on hot side 41. Insulation interlayer 43. Air vent

44. Cold side adsorbent 45. Wire mesh 46. Ring flange

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

[Example 1]:

As shown in Figure 1, a vertical cryogenic container includes an inner tank 10 and an outer shell 1, an axial support of a head is provided between the top outside of the inner tank 10 and the inner top of the outer shell 1, and the inner tank 10 A steel pipe fiberglass support is provided between the outside of the bottom and the outside of the bottom of the shell 1, and the inner tank 10 is provided with a heat-insulating interlayer 41 made of a heat-insulating material;

As shown in Figure 2, the axial support of the head includes an upper assembly and a lower assembly, the lower assembly includes a backing plate-9 fixed on the outside of the top of the liner 10, and a supporting steel pipe-9 is connected to the backing plate-9 8. Two fixing rings 7 are arranged up and down on the inner side of the supporting steel pipe 8, and an annular glass fiber reinforced plastic 11 is clamped between the two fixing rings 7; 5, the top of the housing 1 is provided with a through hole fixed to the other end of the axial support 5, the outer top of the housing 1 is provided with a sealing plate 6 to seal the through hole, and the axial support 5. A support ring 4 is fixed on the outside, and the support ring 4 is connected to the backing plate 2 fixed on the inner top of the shell 1 through the support steel pipe 2 3 at the same time;

The backing plate 9 is provided with a steel pipe 5 12 penetrating into the axial support 5, and at least two layers of annular reinforcement plates 13 are arranged up and down between the steel pipe 5 12 and the axial support 5;

A cavity is provided between the outer side of the supporting steel pipe 2 3 and the backing plate 2 , and a hot-side adsorbent 40 is placed in the cavity.

As shown in Figure 4, the steel pipe fiberglass support includes an inner leg connected to the outer side of the bottom of the inner tank 10, an outer leg connected to the outer bottom of the shell 1, and the inner leg and the outer leg respectively. Auxiliary support for outrigger connection.

The inner leg includes a steel pipe one 15 connected to the outside of the bottom of the liner 10 through a backing plate three 14, and the other end of the steel pipe one 15 is connected to the steel pipe two 19 through a flange one 17 and a flange two 36. FRP 18 is clamped between the first flange 17 and the second flange 36, and the first flange 17 and the second flange 36 use the first 16 glass fiber reinforced plastic gasket as a liner and then tightened by the first fastener 37. Fastener 1 37 includes fastening bolt 1 and fastening nut 1, the fastening openings on the flange 1 17 and flange 2 36 are oblong holes, and the other end of the steel pipe 2 19 is connected Plate 31, the connecting plate 31 is connected to the vacuum leg bottom plate 27 through the glass steel plate 30 at the same time, and the glass fiber reinforced plastic gasket 2 32 is used as a liner between the connecting plate 31, the glass steel plate 30 and the vacuum leg bottom plate 27 Then fasten and connect by the second fastener 33, and the second fastener 33 includes the second fastening bolt.

The outer support leg includes a steel pipe three 22 located on the outside of the steel pipe two 19 and communicated with the inside of the shell 1 and fixed to the bottom of the shell 1 through a backing plate four 21, and the other end of the steel pipe three 22 is connected by a steel pipe four 23 The vacuum outrigger floor 27, the steel pipe three 22 and the steel pipe four 23 can be designed as a butt joint or fillet weld connection structure, the bottom of the vacuum outrigger bottom plate 27 is connected to the steel pipe five 28, and the bottom end of the steel pipe five 28 is set There is a semicircular hole for ventilation, and the other end of the steel pipe 28 is connected with a base plate 29, and the base plate 29 is provided with anchor bolts in contact with the ground, and the anchor bolts are set in even groups such as 4, 6, and 8.

The auxiliary support includes snap ring one 26 welded on the outside of steel pipe two 19 and snap ring two 24 welded on the inside of steel pipe three 22. Inside the lower end of three 22, there is a gap between snap ring one 26 and steel pipe three 22, there is a gap between snap ring two 24 and steel pipe two 19, and snap ring one 26 and snap ring two 24 are set up and down but there is a gap between them. gap.

The flange-17 is provided with an insertion hole for placing the cold-side adsorbent 44 inside the steel pipe-15, and the insertion hole is sealed by fixing the wire mesh 45 and the annular flange 46 with the flange-17 , The side wall of the steel pipe 15 is provided with a plurality of ventilation holes 43, and the ventilation holes 43 are sealed by wire mesh.

In order to facilitate the process assembly, segment splicing is carried out at the lower end of the steel pipe 19. First, the steel pipe 19 is cut into two sections, and the connecting plate 31, the glass steel plate 30 and the vacuum outrigger bottom plate 27 are fixed, and then the steel pipe 19 is welded. .

A vacuum cavity is formed between the inner leg and the outer leg, and if the components in the vacuum space form a support structure to form a closed space, appropriate parts should be selected to open holes to ensure the air flow in the interlayer space. It is convenient to increase the vacuum degree and meet the demand of vacuum insulation.

There are at least 3 groups of the inner legs and the outer legs according to working conditions.

In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims (9)

1. A vertical cryogenic container, comprising an inner container (10) and an outer casing (1), characterized in that: a head shaft is arranged between the outer top of the inner container (10) and the inner top of the outer casing (1) For support, a steel pipe fiberglass support is provided between the outside of the bottom of the inner tank (10) and the outside of the bottom of the shell (1). 2. A vertical cryogenic container according to claim 1, characterized in that: the axial support of the head comprises an upper assembly and a lower assembly, and the lower assembly includes Backing plate one (9), backing plate one (9) is connected with supporting steel pipe one (8), described supporting steel pipe one (8) inner side is provided with two fixing rings (7) up and down, two fixing rings (7) An annular fiberglass (11) is sandwiched between them; the upper assembly includes an axial support (5) that one end penetrates into the fixed ring (7) and the annular fiberglass (11), and the top of the housing (1) is provided with the The other end of the axial support (5) is fixed to a through hole, the outer top of the casing (1) is provided with a sealing plate (6) to seal the through hole, and the outer side of the axial support (5) is fixed with The support ring (4), the support ring (4) is connected with the support plate 2 (2) fixed on the inner top of the shell (1) through the support steel pipe 2 (3) at the same time. 3. A vertical cryogenic container according to claim 1, characterized in that: the steel pipe glass fiber reinforced plastic support includes inner legs connected to the outer side of the bottom of the inner tank (10), connected to the bottom of the outer shell (1) The outer supporting legs connected to the outer side and the auxiliary supports respectively connected with the inner supporting legs and the outer supporting legs. 4. A vertical cryogenic container according to claim 3, characterized in that: the inner leg comprises a steel pipe one (15) connected to the outside of the bottom of the liner (10) through a backing plate three (14) , the other end of the steel pipe one (15) is connected to the steel pipe two (19) through the flange one (17) and the flange two (36), the flange one (17) and the flange two (36) FRP (18) is clamped between them, and the other end of the steel pipe two (19) is connected to the connecting plate (31), and the connecting plate (31) is connected to the vacuum leg bottom plate (27) through the glass steel plate (30) at the same time. 5. A vertical cryogenic container according to claim 4, characterized in that: said outer leg includes an outer leg located on the outer side of said steel pipe 2 (19), which communicates with the inside of said shell (1) and passes through a backing plate 4 ( 21) Three steel pipes (22) fixed to the bottom of the shell (1), the other end of the three steel pipes (22) is connected to the vacuum outrigger bottom plate (27) through the four steel pipes (23). 6. A vertical cryogenic container according to claim 3, characterized in that: said auxiliary support includes snap ring one (26) welded on the outside of steel pipe two (19) and snap ring one (26) welded on the inside of steel pipe three (22). Snap ring two (24). 7. A vertical cryogenic container according to claim 4, characterized in that: said flange one (17) is provided with a cold-side adsorbent (44) that can be placed inside said steel pipe one (15) Put in the hole, and seal the hole by fixing the wire mesh (45) and the ring flange (46) with the flange one (17), and a plurality of air holes are provided on the side wall of the steel pipe one (15) (43), the air hole (43) is sealed with wire mesh. 8. A vertical cryogenic container according to any one of claims 4 or 5, characterized in that: a steel pipe five (28) is connected to the bottom of the vacuum outrigger floor (27), and the steel pipe five (28) The other end is connected with a base plate (29). 9. The vertical cryogenic container according to claim 3, wherein a vacuum cavity is formed between the inner leg and the outer leg.