JP6548423B2 - Vacuum insulation container - Google Patents

Description

The present invention relates to a vacuum insulation container having an inner cylinder and an outer cylinder, and a vacuum heat insulating portion provided between the inner cylinder and the outer cylinder.

Heretofore, as a vacuum insulation container, one having an inner cylinder and an outer cylinder using a stainless steel material and having a vacuum heat insulation portion formed in the middle thereof has been generally used. However, since stainless steel is heavy, for example, Patent Document 1 discloses a co-incubation pot using titanium or a titanium alloy for the inner cylinder and the outer cylinder.
Further, Patent Document 2 describes that the inner cylinder and the outer cylinder of the vacuum double container are formed of titanium or a titanium alloy, and the hardness (Vickers hardness) of titanium or a titanium alloy is 160 or more.

JP 2001-198022 A JP-A-11-164784

In Patent Documents 1 and 2, although the material of the inner cylinder and the outer cylinder is titanium or a titanium alloy, the type of titanium alloy is not disclosed, and a titanium alloy having strength is used for the inner cylinder and the outer cylinder. Nor is it disclosed.
Furthermore, in the vacuum heat insulating container described in Patent Documents 1 and 2, the vacuum heat insulating portion constituted by the inner cylinder and the outer cylinder has a sealed structure, and therefore the gas released from the metal constituting the inner cylinder and the outer cylinder is gradually There was a problem that the degree of vacuum decreased.

The present invention has been made in view of the above circumstances, and it is a first object of the present invention to provide a vacuum insulation container having a light weight and sufficient strength, and to increase the degree of vacuum again even if gas enters the vacuum insulation part. It is a second object to provide a possible vacuum insulation container.

The vacuum insulation container according to the present invention, which meets the above object, is concentrically arranged, and has cylindrical inner and outer cylinders, which are connected to the inner cylinder at the upper end of the outer cylinder and the inner cylinder A vacuum heat insulation container is formed between the outer cylinders, and a vacuum insulation container is provided with an opening at an upper portion of the inner cylinder,
The material of the inner cylinder and the outer cylinder, a tensile strength of at least 895MPa, thermal conductivity using ^{0.02cal / cm 2 / sec / ℃} / cm or less of titanium alloys, the inner cylinder and the outer cylinder the titanium alloy structure is the aluminum and vanadium including Ti-6Al-4V alloy or Ti-6Al-4V (ELI) alloy as an alloying element,
An inner end plate is provided at a lower portion of the inner cylinder, and an outer end plate having a recess protruding upward at the bottom of the outer cylinder and having a circular lower end and serving as a lower base is also provided. It provided a gap from the end plate, with a heat insulating material to reduce thermal expansion difference between the outer tube and the inner tube communicates with the vacuum adiabatic portion between the outer end plate and the inner end plate left Two buffer mechanisms are provided, and a vacuum pump connection port is provided in the outer mirror plate at a lower portion of the outer cylinder and connected to the vacuum heat insulating portion ,
Each of the buffer mechanisms has a cylindrical metal fitting provided at a lower portion of the inner mirror plate, and a pipe member mounted on the outer mirror plate and fitted with the heat insulating material, and the heat insulating material has a height of the metal bracket The fitting is mounted on the metal fitting with a deeper insertion hole, and a gas venting hole is provided on the side of the pipe material, and the swinging of the container body formed by the inner cylinder and the inner end plate in the lateral direction, It absorbs the thermal expansion difference direction.
Although the bottom plate is provided at the lower part of the inner and outer cylinders, the bottom plate is likely to be deformed by a pressure difference if it is flat, so each bottom plate may be hemispherical, partially spherical or truncated conical It is preferable to The lid of the vacuum insulation container can be made of cork, wood or plastic since it is not normally under pressure.

Table 1 shows mechanical properties of pure titanium, titanium alloy (Ti-6Al-4V), and stainless steel (in this example, 18-8 stainless steel). In the case of stainless steel, although it has relatively high tensile strength due to the alloy type and heat treatment, as the specific gravity (density) is twice as large as titanium and titanium alloys, the material of this vacuum insulation container is It is heavy and can not be applied.

Table 2 shows the physical properties of pure titanium and titanium alloys. Pure titanium has relatively low strength, but when alloying elements are added, there are many cases where the tensile strength is 895 MPa or more .

The vacuum heat insulation container which concerns on this invention equips the lower part of the said outer cylinder with the vacuum pump connection port which leads to the said vacuum heat insulation part. In this case, it is preferable to provide a check valve or the like that can be vacuum sealed for a long time at the vacuum pump connection port.

And the vacuum heat insulation container which concerns on this invention is provided with the buffer mechanism which used the heat insulating material which considered the thermal expansion difference of the said inner cylinder and the said outer cylinder in the lower part of the said vacuum heat insulation part.
The outer diameter of the vacuum insulation container is, for example, 10 to 100 cm, and the height is, for example, about 30 to 100 cm. In this case, when the outer diameter is increased, the thickness of each of the outer cylinder and the inner cylinder is further increased because sufficient strength to withstand a vacuum is required. If the vacuum insulation container is small, a handle will be provided, but if the vacuum insulation container is large, it will be stationary.

As apparent from Tables 1 and 2, the vacuum insulation container according to the present invention uses a titanium alloy having a tensile strength of 895 MPa or more as a material of the inner cylinder and the outer cylinder, and the tensile strength of stainless steel (520 MPa Because it is large compared to the tensile strength (340 to 510 MPa) of two pure titanium types (except in the case of work hardening), the thickness of the inner cylinder and the outer cylinder can be thin. Thereby, the plate thickness can be made smaller than that of a conventional vacuum insulation container of the same size. In addition, since the specific gravity of the material is about half, it becomes a lighter vacuum insulation container.
Further, since a titanium alloy having a thermal conductivity of 0.02 cal / cm ² / sec / ° C./cm or less is used, the heat retention property or the cold storage property is good.

In particular, since the vacuum insulation container according to the present invention is provided with the vacuum pump connection port passing through the vacuum insulation part at the lower part of the outer cylinder, the gas released from the container wall accumulated inside the vacuum insulation part after being left for a long time Can be removed to regenerate this vacuum insulation container.

(A) is a top view of the vacuum insulation container concerning one embodiment of the present invention, (B) is a front sectional view of the vacuum insulation container. (A) is an enlarged view of arrow A in FIG. 1, (B) is an enlarged view of arrow B in FIG. 1, (C) is an enlarged view of arrow C in FIG. It is explanatory drawing of the arrow D part in FIG. (A) is a plan view of the lid of the same vacuum insulation container, (B) is a side sectional view of the same.

Subsequently, embodiments of the present invention will be described with reference to the attached drawings.
As shown in FIGS. 1A and 1B, the vacuum insulation container 10 according to the embodiment of the present invention includes an inner cylinder 12 and an outer cylinder 13 provided concentrically with the inner cylinder 12. have. The lower part of the inner cylinder 12 whose upper part is open is provided with the inner end plate 14 which protrudes downward, and the bottom part of the outer cylinder 13 is also the lower pedestal which protrudes upward and also has a circular lower end. An end plate 15 is provided.

In this embodiment, the materials of the inner cylinder 12, the outer cylinder 13, the inner mirror plate 14 and the outer mirror plate 15 have a tensile strength of 895 MPa or more and a thermal conductivity of 0.02 cal / cm ² / sec / ° C./cm or less And a titanium alloy having a specific gravity of 5 or less is used. In this embodiment, a Ti-6Al-4V alloy or a Ti-6Al-4V (ELI) alloy containing aluminum and vanadium as alloy elements is used as a titanium alloy. In addition, about the example of the titanium alloy to be used, it describes in Table 2.

In this embodiment, for example, the outer diameter of the cylindrical outer cylinder 13 is 200 mm, the inner diameter of the cylindrical inner cylinder 12 is 186.3 mm, and the thicknesses of the inner cylinder 12 and the outer cylinder 13 are both 0.. Since it is 8 mm, the gap between the inner cylinder 12 and the outer cylinder 13 is 5.25 mm. When the outer diameters of the inner cylinder 12 and the outer cylinder 13 increase, the plate thickness inevitably increases to maintain the overall strength. The heights of the inner cylinder 12 and the outer cylinder 13 are 360 to 370 mm and 450 to 470 mm, excluding the portions of the inner mirror plate 14 and the outer mirror plate 15.

The upper portion of the outer cylinder 13 is bent inward to form an annular portion 16 as shown in FIG. 2A, and a short cylindrical portion 17 bent upward is formed on the inside of the annular portion 16. ing. The upper end portion of the short cylinder portion 17 and the upper end portion of the inner cylinder 12 are welded to completely seal the upper end portions of the inner cylinder 12 and the outer cylinder 13.

As shown in FIG. 1, at the upper position of the outer cylinder 13, the grips 18 and 19 are provided symmetrically with an angle of 180 degrees in the circumferential direction, and a stainless steel or titanium grip 20 Both ends of the handle are attached via the grips 18 and 19. The handle 20 has a circular arc portion (semi-circular portion) 21 and straight portions 22 and 23 on both sides thereof, and rotates around the handle receivers 18 and 19, usually outside the outer cylinder 13. Abuts and hangs down.

An outer mirror plate 15 having a concave portion facing upward is provided at a lower portion of the outer cylinder 13, and as shown in FIG. 2B, the lower end portion of the outer cylinder 13 and the intermediate position 25 below the outer mirror plate 15 are welded Thus, the space portion 26 acting as a vacuum heat insulating portion formed by the inner cylinder 12 and the outer cylinder 13 is completely sealed. The space portion 26 is vacuum and a heat insulating material (super insulation (trade name)) (not shown) is disposed inside to prevent heat loss due to radiation in vacuum.
Further, as shown in FIG. 2C, a hole 14b is formed at the center of the inner mirror plate 14, and the hole 14b is closed on the hole 14b and a lid 14a is used to completely weld the periphery. The hole 14 b is a hole necessary for manufacturing the inner mirror plate 14 and may not have to be bored due to a change in manufacturing method or the like in the future.

Although the protrusion 27 of the inner mirror plate 14 and the protrusion 28 of the outer mirror plate 15 are formed to face each other, the middle portion (that is, the lower portion of the vacuum heat insulation portion (space portion 26)) is shown in FIG. As shown in FIG. 3, buffer mechanisms 30, 30a are provided. The buffer mechanism 30 (30a is also the same) is mounted on the cylindrical metal fitting 31 provided at the lower part of the inner mirror plate 14 and the metal fitting 31, and heat insulation taking into consideration the thermal expansion difference between the inner cylinder 12 and the outer cylinder 13. Material (cushion material) 32 and the tube member 33 mounted on the outer mirror plate 15 and fitted with the heat insulating material 32, and the swing of the container main body 34 formed by the inner cylinder 12 and the inner mirror plate 14 Share and support. That is, the lower portion (inner mirror plate 14) of the inner cylinder 12 is fixed to the outer mirror plate 15 (base) which constitutes the bottom of the outer cylinder 13 via the heat insulating material 32.

In addition, the side of the pipe 33 has a gas venting hole 33a. The depth of the pipe 33 is approximately the same as the height of the heat insulating material 32, and the depth of the insertion hole 32a of the heat insulating material 32 is deeper than the height of the metal fitting 31, and the buffer mechanisms 30, 30a swing in the left-right direction. To absorb the difference in thermal expansion in the vertical direction.

4A and 4B show the lid 35 of the container main body 34, the circular groove 36 into which the upper end portion of the inner cylinder 12 and the short cylindrical portion 17 are fitted is formed, and from the center position An air vent hole 37 is provided eccentrically. The lid 35 is made of high heat insulating cork or the like.

At the center (top) of the outer mirror plate 15, a vacuum pump connection port 39 leading to the space 26 is provided. The vacuum pump connection port 39 has a structure capable of vacuum sealing as it is after completion of vacuum suction.

When this vacuum insulation container 10 is used, the lid 35 is opened, the object is put (for example, liquid nitrogen), and the lid 35 is put on. At the time of conveyance, a handle 20 provided on the upper outside of the outer cylinder 13 is used.
Since the inner cylinder 12 of the vacuum insulation container 10 is thermally insulated, the inside of the inner cylinder 13 can be maintained at a predetermined temperature for a long time.

The present invention is not limited to the above-described embodiment, and the configuration can be changed without departing from the scope of the present invention.

10: Vacuum insulation container, 12: inner cylinder, 13: outer cylinder, 14: inner end plate, 14a: lid member, 14b: hole, 15: outer end plate, 16: annular portion, 17: short tube portion, 18, 19: Handle receiver 20: Handle 21: arc part 22, 23: straight part 25: halfway position 26: space part 27, 28: projection part 30, 30a: buffer mechanism 31: metal fitting , 32: heat insulating material, 32a: insertion hole, 33: tube, 33a: gas vent, 34: container body, 35: lid, 36: circular groove, 37: air vent, 39: vacuum pump connection port

Claims (2)

Concentrically arranged, each having a cylindrical inner cylinder and an outer cylinder, the upper end of the outer cylinder is connected to the inner cylinder to form a vacuum heat insulating portion between the inner cylinder and the outer cylinder, In a vacuum insulation container provided with an opening at an upper portion of the inner cylinder,
The material of the inner cylinder and the outer cylinder, a tensile strength of at least 895MPa, thermal conductivity using ^{0.02cal / cm 2 / sec / ℃} / cm or less of titanium alloys, the inner cylinder and the outer cylinder the titanium alloy structure is the aluminum and vanadium including Ti-6Al-4V alloy or Ti-6Al-4V (ELI) alloy as an alloying element,
An inner end plate is provided at a lower portion of the inner cylinder, and an outer end plate having a recess protruding upward at the bottom of the outer cylinder and having a circular lower end and serving as a lower base is also provided. It provided a gap from the end plate, with a heat insulating material to reduce thermal expansion difference between the outer tube and the inner tube communicates with the vacuum adiabatic portion between the outer end plate and the inner end plate left Two buffer mechanisms are provided, and a vacuum pump connection port is provided in the outer mirror plate at a lower portion of the outer cylinder and connected to the vacuum heat insulating portion ,
Each of the buffer mechanisms has a cylindrical metal fitting provided at a lower portion of the inner mirror plate, and a pipe member mounted on the outer mirror plate and fitted with the heat insulating material, and the heat insulating material has a height of the metal bracket The fitting is mounted on the metal fitting with a deeper insertion hole, and a gas venting hole is provided on the side of the pipe material, and the swinging of the container body formed by the inner cylinder and the inner end plate in the lateral direction, vacuum insulated container characterized that you absorb the thermal expansion difference direction. The vacuum insulation container according to claim 1 , wherein the vacuum pump connection port includes a check valve.

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