US20040149760A1 - Double-walled metallic vacuum container - Google Patents
Double-walled metallic vacuum container Download PDFInfo
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- US20040149760A1 US20040149760A1 US10/752,551 US75255104A US2004149760A1 US 20040149760 A1 US20040149760 A1 US 20040149760A1 US 75255104 A US75255104 A US 75255104A US 2004149760 A1 US2004149760 A1 US 2004149760A1
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- vacuum container
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C3/00—Vessels not under pressure
- F17C3/02—Vessels not under pressure with provision for thermal insulation
- F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/035—Orientation with substantially horizontal main axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0391—Thermal insulations by vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0391—Thermal insulations by vacuum
- F17C2203/0395—Getter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0626—Multiple walls
- F17C2203/0629—Two walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0639—Steels
- F17C2203/0643—Stainless steels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/01—Mounting arrangements
- F17C2205/0153—Details of mounting arrangements
- F17C2205/0196—Details of mounting arrangements with shock absorbing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0305—Bosses, e.g. boss collars
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0311—Closure means
- F17C2205/032—Closure means pierceable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
- F17C2209/228—Assembling processes by screws, bolts or rivets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/031—Dealing with losses due to heat transfer
- F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
Definitions
- This invention relates to a metallic double-walled vacuum container.
- a conventional metallic vacuum container is of a double-walled structure having an inner shell 1 and an outer shell 2 and made of a metal such as stainless steel.
- the inner shell 1 has a mouth portion 5 protruding outwardly (downwardly in the figure) from an end face 4 thereof.
- the outer peripheral surface of the mouth portion 5 at its tip is joined to a mouth portion 10 of the outer shell 2 .
- the hollow space between the inner and outer shells 1 and 2 is evacuated through an evacuating tip 6 .
- 12 designates a heat-insulating metallic foil, 13 a getter for drawing residual gas, and 14 a bracket.
- the overflow pipe 11 is connected to the plug 7 through a holder 11 ′.
- the bracket 14 is welded to the end face 3 of the outer shell 2 and a presser plate 23 for the plug 7 is fixed to the bracket 14 .
- the vacuum container is used e.g. as a heat accumulator, and with the trunk portion of the outer shell 2 fixed to the container body, liquid heated to a predetermined temperature is supplied through the liquid inlet 8 .
- the liquid is kept hot inside, and by supplying additional liquid through the liquid inlet 8 as necessary, the liquid kept hot is discharged to outside through the liquid outlet 9 via the overflow pipe 11 .
- the mouth portion 5 is formed by a mouth pipe 16 , which is a separate member from the inner shell 1 and is welded to the end face 4 of the inner shell 1 .
- An object of this invention is to provide a metallic double-walled vacuum container which does not cause a reduction in volume even if the mouth portion of the inner shell is lengthened, and which has an increased strength against vibrating loads.
- a metallic double-walled vacuum container comprising a metallic inner shell, a metallic outer shell having a mouth portion and an end face at an open side, a space formed between the inner and outer shells being evacuated, the inner shell having an end face at an open side constricted to form a constricted portion rising inwardly, a mouth pipe having an inner end thereof inserted into and joined to the constricted portion, the mouth pipe having an outer end thereof joined to the mouth portion of the outer shell.
- annular hollow space may be provided around the constricted portion.
- the mouth portion of the inner shell lengthens, so that the heat insulating property improves.
- the volume of the entire container can be increased by an amount equal to the volume of the annular hollow space.
- a heat insulating member for preventing direct contact of the inner shell with the outer shell may be provided on the outer periphery of the top and/or bottom end of the trunk of the inner shell. With this arrangement, it is possible to shut off heat transfer due to direct contact and to prevent generation of metal-to-metal contact sound.
- a metallic double-walled vacuum container comprising a metallic inner shell having a mouth portion, a metallic outer shell having a mouth portion, the mouth portion of the inner shell being joined to the mouth portion of the outer shell, a space formed between the inner and outer shells being evacuated, a plug member fitted in the mouth portion of the inner shell, a presser plate in abutment with the plug member, and a bracket fixed to the outer periphery of the outer shell, the presser plate being coupled to the bracket.
- bracket is fixed to the outer peripheral surface of the outer shell, which is at a position remote from the end face of the outer shell, which tends to be subjected to vibration, cracking at the welded portion due to vibration is prevented.
- a metallic double-walled vacuum container comprising a metallic inner shell having a mouth portion, a metallic outer shell having a mouth portion, the mouth portion of the inner shell being joined to the mouth portion of the outer shell, a space formed between the inner and outer shells being evacuated, the outer shell having a cylindrical portion at a lower end of its mouth portion, the cylindrical portion being disposed around the mouth portion of the inner shell and having its lower end joined to the mouth portion of the inner shell, a plug member fitted in the mouth portion of the inner shell, a presser plate in abutment with the plug member, and a bracket fixed to the outer periphery of the outer shell, the presser plate being coupled to the bracket.
- FIG. 1 is a sectional view of a first embodiment
- FIG. 2 is a sectional view of a second embodiment
- FIG. 3 is a sectional view of a third embodiment
- FIG. 4 is a sectional view of a fourth embodiment
- FIG. 5 is a perspective view of a presser plate of the same
- FIG. 6 is a sectional view of a fifth embodiment
- FIG. 7 is a perspective view of a presser plate of the same.
- FIG. 8 is a sectional view of a sixth embodiment
- FIG. 9A is a perspective view of semi-annular brackets of the same.
- FIG. 9B is a perspective view of a presser plate of the same.
- FIG. 10 is a sectional view of a seventh embodiment
- FIG. 11 is a perspective view of a presser plate of the same.
- FIG. 12 is a sectional view of an eighth embodiment.
- FIGS. 13A and 13B are sectional views of a conventional container.
- the first embodiment shown in FIG. 1 comprises, as with the above-described conventional one, an inner shell 1 and an outer shell 2 , both made of a metal such as stainless steel.
- the inner shell 1 has a mouth portion 5 formed by providing a constricted portion 15 rising inwardly in a tapered manner by a height H at the central portion of an end face 4 of the inner shell 1 and around an opening, inserting the inner end of a metallic mouth pipe 16 into a top opening 21 of the constricted portion 15 and joining it by welding, and joining by welding the outer end of the mouth pipe 16 to a mouth portion 10 of the outer shell 2 as with the conventional container.
- this embodiment is the same as the conventional container in that air between the inner and outer shells is evacuated through the evacuating tip 6 , that a metal foil 12 for heat insulation covers the inner shell 1 , that the getter 13 is mounted, that the bracket 14 is fixed to the end face 3 of the outer shell 2 by welding, and that the presser plate 23 for the plug 7 is coupled to the bracket 14 .
- the heat insulating effect increases correspondingly.
- the joint portion at the top end of the mouth pipe 16 is supported by the tapered constricted portion 15 provided at the end face 4 of the inner shell 1 . Since the constricted portion 15 allows deformation, vibration transmitted from the inner shell 1 to the mouth pipe 16 is absorbed at the constricted portion 15 . As a result, formation of cracks in the joint portion between the mouth pipe 16 and the top end 21 of the constricted portion 15 is prevented.
- the end face 4 of the inner shell 1 is formed deeper by a downward distance H′ than in the conventional one (shown by chain line) so as to be closer to the end face 3 of the outer shell 2 .
- the second embodiment is the same as the first embodiment in that at the end face 4 , a tapered constricted portion 15 is provided to rise inwardly, that the inner end of the mouth pipe 16 is inserted into and joined to the top end 21 , and that the bottom end of the mouth pipe 16 is joined to the mouth portion 10 of the end face 3 of the outer shell 2 to form the mouth portion 5 of the inner shell 1 , and in other structures.
- the heat insulating property improves.
- the constricted portion 15 improves the vibration absorbing property at the joint portion between the mouth pipe 16 and the top end 21 of the constricted portion 15 .
- the volume of the entire container increases by the amount equal to the annular space 17 having a height H′.
- heat insulating members 19 to the top and bottom ends of a trunk portion 18 of the inner shell 1 over the entire circumference thereof, it is possible to prevent direct contact between the outer shell 2 and the inner shell 1 , insulate heat and prevent sounding.
- the inner shell 1 and the outer shell 2 may be in close contact with each other through the heat insulating members 19 .
- the heat insulating members may be provided not over the entire circumference but only at several points spaced in the circumferential direction.
- the vacuum container of the fourth embodiment shown in FIGS. 4 and 5 differs from the prior art shown in FIG. 13A in that the evacuating tip 6 is provided on top of the outer shell 2 , and that a cover cap 22 is fixed by welding to the outer shell 2 to cover it. But it is essentially the same in structures other than those described below. Thus, the same numerals are attached to identical parts and their description is omitted.
- a plurality of radial leg pieces 24 are provided on a circular presser plate 23 which is pressed against the bottom end of the plug 7 .
- the presser plate 23 is formed with two holes 8 ′ and 9 ′ so as to align with the liquid inlet 8 and liquid outlet 9 , respectively.
- a hole 25 for coupling is formed in the tip of each leg piece 24 .
- the outer shell 2 includes the trunk portion 50 which faces generally radially outwardly and extends from the first generally axially facing end face 3 to a second generally axially facing end face 3 ′ that faces in a generally opposite direction than the first end face 3 .
- a shoulder 51 is formed at the outer periphery of the first end face 3 and joins the first end face 3 with the trunk portion 50 .
- Four L-shaped brackets 26 corresponding to the leg pieces 24 are arranged on the trunk portion 50 of the outer shell 2 at equal angular intervals and have their upper ends joined to the trunk portion 50 .
- brackets 26 protrude beyond the first end face 3 , superposed on the tip portions of the respective leg pieces 24 , and fixed together by screws 27 . While the brackets 26 are described as four separate members, they may be a single annular member having an L-shaped section.
- brackets 26 are welded to the outer peripheral surface of the outer shell 2 , at a position remote from the mouth portion of the container, which tends to be influenced by vibration of the inner shell 1 , cracking at the welding portion is prevented.
- the fifth embodiment shown in FIG. 6 differs from the fourth embodiment in the shape of the presser plate 23 and the manner of coupling.
- the presser plate 23 in this embodiment is provided with protrusions 28 at quadrisected positions on its peripheral edge and a rope hole 29 is formed in each protrusion 28 .
- L-shaped brackets 30 are welded to the outer peripheral surface of the outer shell 2 . By passing ropes 31 between the brackets 30 and the protrusions 28 through the rope holes 29 and tightening the ropes, the brackets 30 and the presser plate 23 are fixed together. With this arrangement, as in the fourth embodiment, cracking at the welded portions of the brackets 30 is prevented.
- a pair of semi-annular brackets 32 instead of the brackets 30 , a pair of semi-annular brackets 32 have first ends thereof coupled by a hinge 34 ′, are fitted in an annular groove 33 formed in the outer peripheral surface of the outer shell 2 , and are coupled together at second ends thereof by a bolt 34 with a nut (FIG. 9A).
- Ropes 37 are passed between rope holes 36 formed in protrusions 35 provided on the the semi-annular brackets 32 and rope holes 29 formed in the presser plate 23 (FIG. 9B) and are tightened to couple them together. In this embodiment, there is no need to weld the brackets 32 to the outer shell 2 , so that cracking will not occur.
- belt holes 39 are formed in protrusions 38 provided on the presser plate 23 , and a belt 41 is passed over the outer shell 2 and the cover cap 22 between two opposed belt holes 39 to tighten them together. In this embodiment, too, since there is no welded portion, cracking will not occur.
- the inner portion of the end face 3 of the outer shell 2 is constricted to provide a cylindrical portion 42 , which is fitted around the inner shell mouth portion 5 with a predetermined gap and joined directly to the mouth portion 5 . But it may be indirectly joined through an interposed member.
- the bracket 14 in this embodiment is, as with the first embodiment (FIG. 1), joined to the end face 3 of the outer shell 2 around the cylindrical portion 42 by welding. In this embodiment, since vibration is absorbed and relaxed by the cylindrical portion 42 , cracking at the welded portion of the bracket 14 is prevented.
- the heat insulating property improves and the durability against vibrating loads on the inner shell end face increases. Also, by forming the end face of the inner shell so as to be deeper toward the outer shell, it is possible to increase the container volume by an amount equal to the annular hollow space formed around the constricted portion.
- brackets coupled to the plug presser plate at a position where they are less liable to be affected by vibration employing means for fixing the plug presser plate without such brackets, or providing the cylindrical portion at the lower portion of the outer shell, it is possible to improve durability against vibrating loads.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermally Insulated Containers For Foods (AREA)
- Packages (AREA)
Abstract
A metallic double-walled vacuum container is provided which improves heat insulation and resistance to vibration. It has a metallic inner shell and an outer shell. The end face of the inner shell is constricted so as to rise inwardly. The inner end of a mouth pipe is inserted into and joined to the constricted portion to form a mouth portion of the inner shell and the outer end of the mouth pipe is joined to the outer shell.
Description
- This application is a divisional application of application Ser. No. 10/082,198, filed Feb. 26, 2002.
- This invention relates to a metallic double-walled vacuum container.
- As shown in FIG. 13A, a conventional metallic vacuum container is of a double-walled structure having an
inner shell 1 and anouter shell 2 and made of a metal such as stainless steel. Theinner shell 1 has amouth portion 5 protruding outwardly (downwardly in the figure) from anend face 4 thereof. The outer peripheral surface of themouth portion 5 at its tip is joined to amouth portion 10 of theouter shell 2. The hollow space between the inner andouter shells tip 6. As an example of use, an arrangement is shown in which aplug 7 is inserted in the innershell mouth portion 5, aliquid inlet 8 and aliquid outlet 9 are provided in theplug 7, and anoverflow pipe 11 is connected to the inner end of the liquid outlet 9 (JP utility model publication 7-27430). - Further,12 designates a heat-insulating metallic foil, 13 a getter for drawing residual gas, and 14 a bracket. The
overflow pipe 11 is connected to theplug 7 through aholder 11′. Thebracket 14 is welded to theend face 3 of theouter shell 2 and apresser plate 23 for theplug 7 is fixed to thebracket 14. - The vacuum container is used e.g. as a heat accumulator, and with the trunk portion of the
outer shell 2 fixed to the container body, liquid heated to a predetermined temperature is supplied through theliquid inlet 8. The liquid is kept hot inside, and by supplying additional liquid through theliquid inlet 8 as necessary, the liquid kept hot is discharged to outside through theliquid outlet 9 via theoverflow pipe 11. - In such a vacuum double-walled container, as a means for increasing the heat insulating property, it is preferable to prolong the inner
shell mouth portion 5 because the heat insulating distance is increased. But provided the trunk diameter and the container height are the same, the volume decreases by an amount corresponding to the increase in the length of the inner shell mouth portion 5 (see chain line in FIG. 13A). Also, in use, if a vibrating load acts on the container body, cracks may develop in the welded portion of thebracket 14. This is because vibration of theinner shell 1, which resonates with the vibration of the device body, is transmitted to theend face 3 of theouter shell 2 through themouth portion 5 of theinner shell 1. - On the other hand, in order to increase the heat insulating property, it is conceivable to reduce the diameter of the
mouth portion 5 of theinner shell 1. But drawing is time-consuming and increases the cost. - In order to avoid drawing, as shown in FIG. 13B, a combined structure is feasible in which the
mouth portion 5 is formed by amouth pipe 16, which is a separate member from theinner shell 1 and is welded to theend face 4 of theinner shell 1. - But if such a double-walled vacuum container as in FIG. 13B is used in the manner as described above, one problem is that when a vibrating load is produced, cracks may develop at the welded portion between the
mouth pipe 16 and theend face 4 of theinner shell 1. - An object of this invention is to provide a metallic double-walled vacuum container which does not cause a reduction in volume even if the mouth portion of the inner shell is lengthened, and which has an increased strength against vibrating loads.
- According to this invention, there is provided a metallic double-walled vacuum container comprising a metallic inner shell, a metallic outer shell having a mouth portion and an end face at an open side, a space formed between the inner and outer shells being evacuated, the inner shell having an end face at an open side constricted to form a constricted portion rising inwardly, a mouth pipe having an inner end thereof inserted into and joined to the constricted portion, the mouth pipe having an outer end thereof joined to the mouth portion of the outer shell.
- With this arrangement, it is possible to lengthen the mouth portion by an amount equal to the rising amount of the constricted portion formed on the inner shell. The heat insulating property is increased correspondingly. Also, the joint portion of the mouth pipe to the inner shell is supported by the constricted portion provided on the inner shell. Since the constricted portion allows deformation, vibrating loads transferred to the mouth pipe are is absorbed by the constricted portion. This prevents cracking of the joint portion of the mouth pipe.
- Also, by providing the end face of the inner shell close to the end face of the outer shell, an annular hollow space may be provided around the constricted portion. With this arrangement, the mouth portion of the inner shell lengthens, so that the heat insulating property improves. Also the volume of the entire container can be increased by an amount equal to the volume of the annular hollow space.
- A heat insulating member for preventing direct contact of the inner shell with the outer shell may be provided on the outer periphery of the top and/or bottom end of the trunk of the inner shell. With this arrangement, it is possible to shut off heat transfer due to direct contact and to prevent generation of metal-to-metal contact sound.
- As another means for achieving the object of increasing strength against vibrating loads, according to this invention, there is also provided a metallic double-walled vacuum container comprising a metallic inner shell having a mouth portion, a metallic outer shell having a mouth portion, the mouth portion of the inner shell being joined to the mouth portion of the outer shell, a space formed between the inner and outer shells being evacuated, a plug member fitted in the mouth portion of the inner shell, a presser plate in abutment with the plug member, and a bracket fixed to the outer periphery of the outer shell, the presser plate being coupled to the bracket.
- With this arrangement, since the bracket is fixed to the outer peripheral surface of the outer shell, which is at a position remote from the end face of the outer shell, which tends to be subjected to vibration, cracking at the welded portion due to vibration is prevented.
- Further, as another means for achieving the object of increasing strength against vibrating loads, there is also provided a metallic double-walled vacuum container comprising a metallic inner shell having a mouth portion, a metallic outer shell having a mouth portion, the mouth portion of the inner shell being joined to the mouth portion of the outer shell, a space formed between the inner and outer shells being evacuated, the outer shell having a cylindrical portion at a lower end of its mouth portion, the cylindrical portion being disposed around the mouth portion of the inner shell and having its lower end joined to the mouth portion of the inner shell, a plug member fitted in the mouth portion of the inner shell, a presser plate in abutment with the plug member, and a bracket fixed to the outer periphery of the outer shell, the presser plate being coupled to the bracket.
- With this arrangement, vibration acting on the welded portion of the bracket is absorbed at the cylindrical portion of the outer shell. Thus cracking is prevented.
- Other features and objects of the present invention will become apparent from the following description made with reference to the accompanying drawings, in which:
- FIG. 1 is a sectional view of a first embodiment;
- FIG. 2 is a sectional view of a second embodiment;
- FIG. 3 is a sectional view of a third embodiment;
- FIG. 4 is a sectional view of a fourth embodiment;
- FIG. 5 is a perspective view of a presser plate of the same;
- FIG. 6 is a sectional view of a fifth embodiment;
- FIG. 7 is a perspective view of a presser plate of the same;
- FIG. 8 is a sectional view of a sixth embodiment;
- FIG. 9A is a perspective view of semi-annular brackets of the same;
- FIG. 9B is a perspective view of a presser plate of the same;
- FIG. 10 is a sectional view of a seventh embodiment;
- FIG. 11 is a perspective view of a presser plate of the same;
- FIG. 12 is a sectional view of an eighth embodiment; and
- FIGS. 13A and 13B are sectional views of a conventional container.
- Hereinbelow, the embodiments of this invention will be described with reference to the attached drawings.
- The first embodiment shown in FIG. 1 comprises, as with the above-described conventional one, an
inner shell 1 and anouter shell 2, both made of a metal such as stainless steel. Theinner shell 1 has amouth portion 5 formed by providing aconstricted portion 15 rising inwardly in a tapered manner by a height H at the central portion of anend face 4 of theinner shell 1 and around an opening, inserting the inner end of ametallic mouth pipe 16 into atop opening 21 of theconstricted portion 15 and joining it by welding, and joining by welding the outer end of themouth pipe 16 to amouth portion 10 of theouter shell 2 as with the conventional container. - Otherwise, this embodiment is the same as the conventional container in that air between the inner and outer shells is evacuated through the evacuating
tip 6, that ametal foil 12 for heat insulation covers theinner shell 1, that thegetter 13 is mounted, that thebracket 14 is fixed to theend face 3 of theouter shell 2 by welding, and that thepresser plate 23 for theplug 7 is coupled to thebracket 14. - In the structure of the first embodiment, compared with the conventional one, since the
mouth portion 5 of theinner shell 1 is lengthened by an amount equal to the height H of theconstricted portion 15, the heat insulating effect increases correspondingly. Also, the joint portion at the top end of themouth pipe 16 is supported by the taperedconstricted portion 15 provided at theend face 4 of theinner shell 1. Since theconstricted portion 15 allows deformation, vibration transmitted from theinner shell 1 to themouth pipe 16 is absorbed at theconstricted portion 15. As a result, formation of cracks in the joint portion between themouth pipe 16 and thetop end 21 of theconstricted portion 15 is prevented. - In the second embodiment shown in FIG. 2, the
end face 4 of theinner shell 1 is formed deeper by a downward distance H′ than in the conventional one (shown by chain line) so as to be closer to theend face 3 of theouter shell 2. The second embodiment is the same as the first embodiment in that at theend face 4, a taperedconstricted portion 15 is provided to rise inwardly, that the inner end of themouth pipe 16 is inserted into and joined to thetop end 21, and that the bottom end of themouth pipe 16 is joined to themouth portion 10 of theend face 3 of theouter shell 2 to form themouth portion 5 of theinner shell 1, and in other structures. - With this arrangement, as with the first embodiment, since the
mouth portion 5 is prolonged by the amount equal to the height H of theconstricted portion 15, the heat insulating property improves. Also, theconstricted portion 15 improves the vibration absorbing property at the joint portion between themouth pipe 16 and thetop end 21 of theconstricted portion 15. Also, the volume of the entire container increases by the amount equal to theannular space 17 having a height H′. - Further, as shown in FIG. 2, by sticking
heat insulating members 19 to the top and bottom ends of atrunk portion 18 of theinner shell 1 over the entire circumference thereof, it is possible to prevent direct contact between theouter shell 2 and theinner shell 1, insulate heat and prevent sounding. Theinner shell 1 and theouter shell 2 may be in close contact with each other through theheat insulating members 19. The heat insulating members may be provided not over the entire circumference but only at several points spaced in the circumferential direction. - In the third embodiment shown in FIG. 3, by providing the
mouth pipe 16 with acorrugated portion 20, the heat insulating effect is increased without increasing the entire length of themouth pipe 16. - Next, the vacuum container of the fourth embodiment shown in FIGS. 4 and 5 differs from the prior art shown in FIG. 13A in that the evacuating
tip 6 is provided on top of theouter shell 2, and that acover cap 22 is fixed by welding to theouter shell 2 to cover it. But it is essentially the same in structures other than those described below. Thus, the same numerals are attached to identical parts and their description is omitted. - In this embodiment, a plurality of radial leg pieces24 (FIG. 5) are provided on a
circular presser plate 23 which is pressed against the bottom end of theplug 7. Thepresser plate 23 is formed with twoholes 8′ and 9′ so as to align with theliquid inlet 8 andliquid outlet 9, respectively. In the tip of eachleg piece 24, ahole 25 for coupling is formed. - As shown in FIG. 4, the
outer shell 2 includes thetrunk portion 50 which faces generally radially outwardly and extends from the first generally axially facingend face 3 to a second generally axially facingend face 3′ that faces in a generally opposite direction than thefirst end face 3. Ashoulder 51 is formed at the outer periphery of thefirst end face 3 and joins thefirst end face 3 with thetrunk portion 50. Four L-shapedbrackets 26 corresponding to theleg pieces 24 are arranged on thetrunk portion 50 of theouter shell 2 at equal angular intervals and have their upper ends joined to thetrunk portion 50. The bottom ends of therespective brackets 26 protrude beyond thefirst end face 3, superposed on the tip portions of therespective leg pieces 24, and fixed together byscrews 27. While thebrackets 26 are described as four separate members, they may be a single annular member having an L-shaped section. - With this arrangement, since the
brackets 26 are welded to the outer peripheral surface of theouter shell 2, at a position remote from the mouth portion of the container, which tends to be influenced by vibration of theinner shell 1, cracking at the welding portion is prevented. - The fifth embodiment shown in FIG. 6 differs from the fourth embodiment in the shape of the
presser plate 23 and the manner of coupling. As shown in FIG. 7, thepresser plate 23 in this embodiment is provided withprotrusions 28 at quadrisected positions on its peripheral edge and arope hole 29 is formed in eachprotrusion 28. Also, L-shapedbrackets 30 are welded to the outer peripheral surface of theouter shell 2. By passingropes 31 between thebrackets 30 and theprotrusions 28 through the rope holes 29 and tightening the ropes, thebrackets 30 and thepresser plate 23 are fixed together. With this arrangement, as in the fourth embodiment, cracking at the welded portions of thebrackets 30 is prevented. - In the sixth embodiment shown in FIGS. 8, 9A and9B, instead of the
brackets 30, a pair ofsemi-annular brackets 32 have first ends thereof coupled by ahinge 34′, are fitted in anannular groove 33 formed in the outer peripheral surface of theouter shell 2, and are coupled together at second ends thereof by abolt 34 with a nut (FIG. 9A).Ropes 37 are passed between rope holes 36 formed inprotrusions 35 provided on the thesemi-annular brackets 32 and rope holes 29 formed in the presser plate 23 (FIG. 9B) and are tightened to couple them together. In this embodiment, there is no need to weld thebrackets 32 to theouter shell 2, so that cracking will not occur. - In the seventh embodiment shown in FIGS. 10 and 11, belt holes39 are formed in
protrusions 38 provided on thepresser plate 23, and abelt 41 is passed over theouter shell 2 and thecover cap 22 between two opposed belt holes 39 to tighten them together. In this embodiment, too, since there is no welded portion, cracking will not occur. - In the eighth embodiment shown in FIG. 12, the inner portion of the
end face 3 of theouter shell 2 is constricted to provide acylindrical portion 42, which is fitted around the innershell mouth portion 5 with a predetermined gap and joined directly to themouth portion 5. But it may be indirectly joined through an interposed member. - The
bracket 14 in this embodiment is, as with the first embodiment (FIG. 1), joined to theend face 3 of theouter shell 2 around thecylindrical portion 42 by welding. In this embodiment, since vibration is absorbed and relaxed by thecylindrical portion 42, cracking at the welded portion of thebracket 14 is prevented. - As described above, according to this invention, since the length of the mouth portion is increased by an amount equal to the height of the inwardly directed constricted portion provided on the inner shell, the heat insulating property improves and the durability against vibrating loads on the inner shell end face increases. Also, by forming the end face of the inner shell so as to be deeper toward the outer shell, it is possible to increase the container volume by an amount equal to the annular hollow space formed around the constricted portion.
- Further, by providing the brackets coupled to the plug presser plate at a position where they are less liable to be affected by vibration, employing means for fixing the plug presser plate without such brackets, or providing the cylindrical portion at the lower portion of the outer shell, it is possible to improve durability against vibrating loads.
Claims (8)
1. A metallic double-walled vacuum container comprising:
a metallic inner shell having a mouth portion;
a metallic outer shell having first and second generally axially-facing end faces facing in generally axially opposite directions, a mouth portion provided at said first axially-facing end face, a shoulder provided at an outer periphery of said first axially-facing end face, and a generally radially outwardly-facing trunk portion joined to said first axially-facing end face at said shoulder and extending axially from said first axially-facing end face to said second axially-facing end face;
wherein said mouth portion of said inner shell is joined to said mouth portion of said outer shell;
wherein a space is formed between said inner and outer shells;
wherein a plug member is fitted in said mouth portion of said inner shell;
wherein a presser plate is mounted in abutment with said plug member;
wherein at least one bracket is fixed to said radially outwardly-facing trunk portion of said outer shell radially outwardly of said shoulder; and
wherein said presser plate is fixed with and supported by said at least one bracket.
2. The metallic double-walled vacuum container as claimed in claim 1 , wherein said space formed between said inner and outer shells is an evacuated space.
3. The metallic double-walled vacuum container as claimed in claim 1 , wherein said first axially-facing end face of said outer shell extends outwardly from said mouth portion of said outer shell to said shoulder in a radially outward direction that is oblique axially toward said second axially-facing end face.
4. The metallic double-walled vacuum container as claimed in claim 1 , wherein said plug member has a liquid inlet and a liquid outlet formed therein, and said plug member is mounted in said mouth portion of said inner shell so as to plug said mouth portion of said inner shell.
5. The metallic double-walled vacuum container as claimed in claim 1 , wherein said at least one bracket comprises plural brackets; and
said presser plate comprises a plate portion and a plurality of legs extending radially from said plate portion;
wherein said brackets are coupled to said legs of said presser plate, respectively.
6. The metallic double-walled vacuum container as claimed in claim 1 , wherein said at least one bracket has a radially inner end and a radially outer end, said radially inner end being coupled to said presser plate, and said radially outer end being fixed to said radially outwardly-facing trunk portion.
7. The metallic double-walled vacuum container as claimed in claim 1 , wherein said at least one bracket comprises an L-shaped bracket having a radially inner end that extends radially and a radially outer end that extends axially, said radially inner end being coupled to said presser plate, and said radially outer end being fixed to said radially outwardly-facing trunk portion.
8. The metallic double-walled vacuum container as claimed in claim 1 , wherein said at least one bracket comprises a plurality of L-shaped brackets each having a radially inner end that extends radially and a radially outer end that extends axially, said radially inner end being coupled to said presser plate, and said radially outer end being fixed to said radially outwardly-facing trunk portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/752,551 US20040149760A1 (en) | 2001-03-02 | 2004-01-08 | Double-walled metallic vacuum container |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-58637 | 2001-03-02 | ||
JP2001058637 | 2001-03-02 | ||
JP2001-354990 | 2001-11-20 | ||
JP2001354990A JP3885566B2 (en) | 2001-03-02 | 2001-11-20 | Metal vacuum double container |
US10/082,198 US20020125258A1 (en) | 2001-03-02 | 2002-02-26 | Double-walled metallic vacuum container |
US10/752,551 US20040149760A1 (en) | 2001-03-02 | 2004-01-08 | Double-walled metallic vacuum container |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/082,198 Division US20020125258A1 (en) | 2001-03-02 | 2002-02-26 | Double-walled metallic vacuum container |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040149760A1 true US20040149760A1 (en) | 2004-08-05 |
Family
ID=26610535
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/082,198 Abandoned US20020125258A1 (en) | 2001-03-02 | 2002-02-26 | Double-walled metallic vacuum container |
US10/752,551 Abandoned US20040149760A1 (en) | 2001-03-02 | 2004-01-08 | Double-walled metallic vacuum container |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/082,198 Abandoned US20020125258A1 (en) | 2001-03-02 | 2002-02-26 | Double-walled metallic vacuum container |
Country Status (2)
Country | Link |
---|---|
US (2) | US20020125258A1 (en) |
JP (1) | JP3885566B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4124790A1 (en) * | 2021-07-27 | 2023-02-01 | Airbus Operations, S.L.U. | Hydrogen tank for aircrafts |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060243745A1 (en) * | 2005-04-29 | 2006-11-02 | Jeffrey Doneghue | Insulated dispense tube server |
JP4921232B2 (en) * | 2007-04-23 | 2012-04-25 | 象印マホービン株式会社 | Insulated container and manufacturing method thereof |
US9504349B2 (en) * | 2008-06-12 | 2016-11-29 | Breville Pty Ltd | Carafe with off centre opening |
US9126715B2 (en) | 2012-08-16 | 2015-09-08 | Mirapro Co., Ltd. | Metallic sealed double container |
WO2016040362A1 (en) * | 2014-09-08 | 2016-03-17 | GrowlerWerks, INC. | Beverage dispenser |
DE202016104705U1 (en) * | 2016-08-26 | 2017-11-29 | abh Ingenieur-Technik GmbH | Thermo container for temperature-sensitive fluids |
CN110325786B (en) * | 2016-12-27 | 2022-07-01 | 姆威伊生物解决方案(美国)有限责任公司 | Impact-resistant Dewar flask |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1095759A (en) * | 1913-04-11 | 1914-05-05 | Leslie W White | Heat-insulated receptacle. |
US1726469A (en) * | 1926-09-07 | 1929-08-27 | Brenner Charles Mandell | Ice-cream container |
US3057603A (en) * | 1958-03-11 | 1962-10-09 | Technicon Instr | Glass tube coil assemblies and heating baths |
US4185752A (en) * | 1977-08-08 | 1980-01-29 | Pedro Basile | Pressure cooker lid fastening means |
US4351451A (en) * | 1979-02-17 | 1982-09-28 | Han Baek Trading Co., Ltd. | Rubber sealed metal vacuum bottle and stopper caps therefor |
US4660736A (en) * | 1986-04-14 | 1987-04-28 | Stauffer Chemical Company | Resealable shipping container |
US5632403A (en) * | 1995-04-11 | 1997-05-27 | Deng; Chih-Chiang | Pressure cooker |
-
2001
- 2001-11-20 JP JP2001354990A patent/JP3885566B2/en not_active Expired - Fee Related
-
2002
- 2002-02-26 US US10/082,198 patent/US20020125258A1/en not_active Abandoned
-
2004
- 2004-01-08 US US10/752,551 patent/US20040149760A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1095759A (en) * | 1913-04-11 | 1914-05-05 | Leslie W White | Heat-insulated receptacle. |
US1726469A (en) * | 1926-09-07 | 1929-08-27 | Brenner Charles Mandell | Ice-cream container |
US3057603A (en) * | 1958-03-11 | 1962-10-09 | Technicon Instr | Glass tube coil assemblies and heating baths |
US4185752A (en) * | 1977-08-08 | 1980-01-29 | Pedro Basile | Pressure cooker lid fastening means |
US4351451A (en) * | 1979-02-17 | 1982-09-28 | Han Baek Trading Co., Ltd. | Rubber sealed metal vacuum bottle and stopper caps therefor |
US4660736A (en) * | 1986-04-14 | 1987-04-28 | Stauffer Chemical Company | Resealable shipping container |
US5632403A (en) * | 1995-04-11 | 1997-05-27 | Deng; Chih-Chiang | Pressure cooker |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4124790A1 (en) * | 2021-07-27 | 2023-02-01 | Airbus Operations, S.L.U. | Hydrogen tank for aircrafts |
Also Published As
Publication number | Publication date |
---|---|
JP3885566B2 (en) | 2007-02-21 |
US20020125258A1 (en) | 2002-09-12 |
JP2002326674A (en) | 2002-11-12 |
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