HK1236888A1 - A method for processing a vacuum container and a vacuum container - Google Patents

Description

Vacuum container processing method and vacuum container

Technical Field

The invention relates to the field of household appliances, in particular to a processing method of a vacuum container and the vacuum container.

Background

With the demand of life, the vacuum container is more and more important to the daily life of people. The existing vacuum container comprises a vacuum cup, a vacuum pot and the like, wherein the vacuum pot is taken as an example, the existing vacuum pot is provided with an outer container and an inner container which is arranged in the outer container and used for containing liquid, the outer wall of the inner container and the inner wall of the outer container are mutually spaced, the top of the inner container and the top of the outer container are mutually in sealing connection, a pot opening of the vacuum pot is formed at the top of the vacuum pot, and the inner container and the outer container are in sealing connection at the pot opening. The vacuum kettle adopts argon arc welding mode to weld the bottom edge position of outer courage and has the gasket rather than aligning to will be located the air between inner bag and the outer courage and take out and form the vacuum, with the thermal insulation performance of effective assurance vacuum kettle.

However, when the sealing sheet and the outer container are welded, a welding portion is formed, which affects the outer shape of the vacuum pot, and in order to avoid the influence of the welding portion on the whole vacuum pot, the welding portion is covered in the following two ways in the prior art.

Mode 1: referring to fig. 1, an outer bottom cover 4 is fixedly installed at the bottom of the vacuum pot, and the outer bottom cover 4 covers a welding part 6; because the mode that adopts argon arc welding to weld between the gasket 3 of the bottom of vacuum flask and 1 bottom border of outer courage carries out welded fastening and forms welding position 6 realize the sealed and heat preservation between outer courage 1 and the inner bag 2, if carry out argon arc welding once more in 1 bottom border of outer courage and just make former welding position produce the thin hourglass because of high temperature easily to lead to the vacuum region between inner bag 2 and the outer courage 1 to disappear, make the vacuum flask not have the heat preservation effect. Therefore, the outer bottom cover can be fixed on the bottom of the vacuum pot only by other methods, such as glue bonding, screw screwing and the like.

Mode 2: the mode is that an anti-slip mat is fixed at the bottom of the vacuum pot through glue adhesion, and the anti-slip mat covers the welding part.

However, in the embodiment 1, as shown in fig. 1, the outer bladder 1 and the outer bottom cover 4 of the vacuum pot have the interlayer 5 at the time of fixing connection, and are fixed at the interlayer position. Because there is intermediate layer 5 between outer courage 1 and the bottom 4, if the connection of intermediate layer 5 position is not hard up, this outer bottom 4 has the risk of coming off, leads to the vacuum flask wholly incomplete, not only makes the welding position expose, but also inconvenient use. Particularly, when the vacuum pot is cleaned, the interlayer is more easily penetrated with water, which causes inconvenience to a user and deteriorates the tightness or strength of the connection between the vacuum pot and the outer bottom.

Disclosure of Invention

The invention aims to solve the technical problem of providing a vacuum container processing method and a vacuum container, wherein the outer bottom cover and the outer container are tightly fixedly connected, and the outer bottom cover and the outer container are prevented from having an interlayer.

The purpose of the invention is realized by the following technical scheme:

according to one aspect of the present invention, there is provided a processing method of a vacuum vessel, wherein the processing method includes a step of welding a sealing sheet, and a step of welding an outer bottom cover;

the sealing sheet is welded on the inner wall of the outer liner, and a welding tail wing is reserved at the bottom of the outer liner;

the outer bottom cover is welded on the tail wing in an argon arc welding mode, and the outer bottom cover is welded on the tail wing in a seamless mode through argon arc welding.

Preferably, the sealing sheet is welded on the inner wall of the outer container in a laser welding mode.

Preferably, in the step of welding the outer bottom cover, a welding mark is removed after the outer bottom cover is welded to the outer container.

Preferably, a circle of turnover is arranged at the edge of the sealing piece, and the sealing piece is welded on the inner wall of the outer container by welding the turnover.

Preferably, in the step of welding the outer bottom cover, an edge of the rear wing is aligned with an edge of the outer bottom cover before the outer bottom cover is welded to the rear wing.

According to another aspect of the present invention, there is provided a vacuum vessel, wherein the vacuum vessel comprises an outer container and a sealing sheet, the sealing sheet is fixed on the inner wall of the outer container by welding, and a welding tail fin is left at the bottom of the outer container;

the vacuum container still includes outer bottom, outer bottom welds through the mode welding that argon arc welded on the fin, and outer bottom welds seamless welding through argon arc on the fin.

Preferably, the sealing sheet is welded and fixed on the inner wall of the outer container in a laser welding mode.

Preferably, the edge of the sealing piece is provided with a circle of turnover, and the turnover is welded with the inner wall of the outer container, so that the sealing piece is fixed on the inner wall of the outer container.

Preferably, the sealing sheet is made of stainless steel.

Preferably, the outer bottom cover is made of stainless steel material.

Compared with the prior art, the invention has the following advantages: according to the invention, the sealing sheet is welded and fixed on the inner wall of the outer container, the welding tail fin is reserved at the bottom of the outer container, the outer bottom cover is welded on the tail fin in an argon arc welding mode, and fine leakage cannot be generated at the welding position due to different welding positions in two times of welding, so that the sealing effect between the outer container of the vacuum container and the sealing sheet is ensured, and the heat preservation effect of the vacuum container is further ensured.

In addition, the outer bottom cover and the empennage of the outer liner are welded and fixed in an argon arc welding mode, the edge of the outer bottom cover and the edge of the bottom of the outer liner are required to be aligned with each other to realize welding in the welding process, so that no interlayer or no seam exists between the outer bottom cover and the outer liner, the outer bottom cover and the outer liner are connected tightly and are fixed firmly, and an integral structure is formed. Under the prerequisite that the outer courage of vacuum vessel is connected effectually with gasket and outer bottom closure sealing respectively like this, still conveniently wash vacuum vessel, and prevent inside liquid infiltration vacuum vessel, convenient production, use and carry.

Drawings

FIG. 1 is a partial cross-sectional view of a vacuum jug of the prior art;

FIG. 2 is a cross-sectional view of a vacuum vessel according to one embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of a vacuum vessel according to one embodiment of the present invention;

fig. 4 is a flow chart of a method of processing a vacuum vessel according to another embodiment of the present invention.

Wherein:

FIG. 1: 1. an outer liner; 2. an inner container; 3. sealing the sheet; 4. an outer bottom cover; 5. an interlayer; 6. welding parts;

fig. 2 to 3: 10. a vacuum container (vacuum pot); 11. a kettle mouth; 12. a first weld line; 13. a second weld line; 100. an outer liner; 110. a tail wing; 200. an inner container; 300. sealing the sheet; 310. folding; 400. and an outer bottom cover.

Detailed Description

The invention discloses a processing method of a vacuum container and the vacuum container, wherein the processing method comprises a step of welding a sealing sheet and a step of welding an outer bottom cover; the sealing sheet is welded on the inner wall of the outer liner, and a welding tail wing is reserved at the bottom of the outer liner; and the outer bottom cover is welded on the empennage in an argon arc welding mode. According to the invention, the welding tail fin is reserved after the sealing sheet is welded on the outer container, and the outer bottom cover is welded on the tail fin in an argon arc welding manner, so that the heat preservation effect of the vacuum container is ensured, and the outer bottom cover and the outer container are free of an interlayer and seamless and are tightly connected to form a whole body, thereby being convenient to clean and use.

The invention is further illustrated by the following figures and examples.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the term "comprises" and any variations thereof is intended to cover non-exclusive inclusions.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A vacuum vessel 10 and a method of manufacturing the vacuum vessel 10 according to an embodiment of the present invention will be described with reference to fig. 2 to 4, and the vacuum vessel 10 may be a vacuum pot. In the following description of the present application, the vacuum vessel 10 is described as an example of a vacuum pot. Of course, it will be understood by those skilled in the art that the vacuum vessel 10 is illustrated as a vacuum flask by way of example and not limitation, i.e., the vacuum vessel 10 according to the present invention may also be other types of vacuum vessels, such as a vacuum cup or the like.

As an embodiment of the present invention, as shown in fig. 2 and 3, a vacuum container 10 is disclosed in the present embodiment, and the present embodiment is described in detail by taking a vacuum pot as an example.

The vacuum pot 10 comprises an outer container 100 and an inner container 200 which is arranged in the outer container 100 and used for containing liquid, the outer wall of the inner container 200 and the inner wall of the outer container 100 are spaced from each other, the top of the inner container 200 and the top of the outer container 100 are in sealing connection with each other, a pot opening 11 of the vacuum pot is formed at the top of the vacuum pot 10, and the inner container 200 and the outer container 100 are in sealing connection at the position of the pot opening 11.

In this embodiment, there is only one outer container 100 and one inner container 200, i.e., one inner container 200 is located inside one outer container 100, as shown in fig. 2 and 3. However, the present embodiment is not limited to only installing one inner container in the outer container, and two inner containers, three inner containers or more inner containers may be installed in one outer container, and the inner containers are spaced apart from each other, so as to achieve sealing between the inner containers.

Wherein, the vacuum pot 10 further comprises a sealing sheet 300, as shown in fig. 2 and fig. 3, the top of the outer container 100 is connected with the inner container, the other end of the outer container 100, namely the bottom of the outer container 100 is connected with the sealing sheet 300, and the sealing sheet 300 and the outer container 100 form a whole, so that the inner container 200 and the outer container 100 are sealed, and the vacuum pot has a heat preservation effect. Specifically, the sealing sheet 300 is fixed to the inner wall of the outer container 100 by welding, forming a first welding line 12, and leaving a welding tail 110 at the bottom of the outer container 100. In this embodiment, the mode welded fastening that the gasket 300 passes through laser welding is in on the 100 inner walls of outer courage, and laser welding conveniently realizes, directly carries out laser welding with outer courage inner wall and gasket laminating, need not to align the border of gasket and the bottom border of outer courage and welds again. The laser welding method is only one specific embodiment of the present embodiment for welding and fixing the sealing sheet and the outer bladder, however, the present embodiment is not limited to the welding and fixing of the sealing sheet and the outer bladder by laser welding, and other sealing and fixing methods may be used.

Specifically, the edge of the sealing piece 300 is provided with a circle of folding pieces 310, as shown in fig. 2 and 3, the folding pieces 310 are formed by bending the edges of the sealing piece outwards, the folding pieces 310 are attached to the inner wall of the outer container 100, and during laser welding, the folding pieces are welded to the inner wall of the outer container, so that the sealing piece is fixed to the inner wall of the outer container. Therefore, the thickness and the height of the turnover can be adjusted according to the requirement, and the welding position is sealed and firm. However, it is also possible that the present embodiment does not provide a fold.

In the embodiment, the welding position of the first welding line 12 is removed and polished after the turnover and the welding of the outer container are completed, so that the welding position is smooth and flat.

Wherein, vacuum flask 10 still includes outer bottom cover 400, as shown in fig. 2 and 3, outer bottom cover 400 welds through the mode that argon arc welded on fin 110, forms second weld line 13, and outer bottom cover welds seamless welding through argon arc on the fin.

Specifically, in the present embodiment, the sealing plate 300 is welded and fixed to the inner wall of the outer container 100, and meanwhile, the welding tail fin 110 is left at the bottom of the outer container 100, the outer bottom cover 400 is welded to the tail fin 110 in an argon arc welding manner, and different welding lines are formed due to different welding positions of welding twice, so that a fine leakage at the welding position is not generated, and thus the sealing effect between the outer container 100 and the sealing plate 300 of the vacuum bottle 10 is ensured, and the heat preservation effect of the vacuum bottle 10 is ensured.

In addition, the outer bottom cover 400 and the tail fin 110 of the outer bladder 100 are welded and fixed in an argon arc welding manner, and the edge of the outer bottom cover 400 and the bottom edge of the outer bladder 100 need to be aligned with each other to realize welding in the welding process, that is, the edge of the outer bottom cover 400 and the edge of the tail fin 110 need to be aligned with each other to realize welding in the welding process, so that no interlayer or gap exists between the outer bottom cover 400 and the outer bladder 100, and the outer bottom cover 400 and the outer bladder 100 are tightly connected and firmly fixed to form an integral structure. Under the prerequisite that the outer courage of vacuum vessel is connected effectually with gasket and outer bottom closure sealing respectively like this, still conveniently wash vacuum vessel, and prevent inside liquid infiltration vacuum vessel, convenient production, use and carry.

After the outer bottom cover 400 and the tail fin 110 are welded, the welding position of the second welding line 13 is removed and polished, so that the welding position is smooth and flat.

In this embodiment, the sealing plate 300 and the outer bottom 400 are made of stainless steel, which has high strength, is not rusted, and has a long life. However, the material of the sealing sheet and the outer bottom cover in the present embodiment is not limited to the stainless material, and other metal materials may be used.

As another embodiment of the present invention, as shown in fig. 4, fig. 4 only shows a part of the process steps for processing a vacuum container, and this embodiment discloses a method for processing a vacuum container, and this embodiment also takes a vacuum container as an example for description. With reference to fig. 2 and 3, the vacuum pot 10 of the previous embodiment can be formed by the method of processing the vacuum pot of the present embodiment.

The processing method comprises the steps of welding the sealing sheet and welding the outer bottom cover;

the welded sealing piece is S1 shown in fig. 4: welding a sealing sheet on the inner wall of the outer container, and reserving a welding tail wing at the bottom of the outer container;

the welding outer bottom cover is S2 shown in fig. 4: and welding the outer bottom cover on the tail wing in an argon arc welding mode, and welding the outer bottom cover on the tail wing in a seamless mode through argon arc welding.

Specifically, in the present embodiment, the sealing plate 300 is welded and fixed to the inner wall of the outer container 100, and meanwhile, the welding tail fin 110 is left at the bottom of the outer container 100, the outer bottom cover 400 is welded to the tail fin 110 in an argon arc welding manner, and different welding lines are formed due to different welding positions of welding twice, so that a fine leakage at the welding position is not generated, and thus the sealing effect between the outer container 100 and the sealing plate 300 of the vacuum bottle 10 is ensured, and the heat preservation effect of the vacuum bottle 10 is ensured.

In addition, the outer bottom cover 400 and the tail fin 110 of the outer bladder 100 are welded and fixed in an argon arc welding manner, and the edge of the outer bottom cover 400 and the bottom edge of the outer bladder 100 need to be aligned with each other to realize welding in the welding process, that is, the edge of the outer bottom cover 400 and the edge of the tail fin 110 need to be aligned with each other to realize welding in the welding process, so that no interlayer or gap exists between the outer bottom cover 400 and the outer bladder 100, and the outer bottom cover 400 and the outer bladder 100 are tightly connected and firmly fixed to form an integral structure. Under the prerequisite that the outer courage of vacuum vessel is connected effectually with gasket and outer bottom closure sealing respectively like this, still conveniently wash vacuum vessel, and prevent inside liquid infiltration vacuum vessel, convenient production, use and carry.

Specifically, the processing method of the vacuum pot comprises the following specific steps:

firstly, selecting an outer container and an inner container, arranging the inner container 200 which is arranged in the outer container 100 and is used for containing liquid, wherein the outer wall of the inner container 200 and the inner wall of the outer container 100 are mutually spaced, the top of the inner container 200 and the top of the outer container 100 are mutually connected in a sealing way, a pot opening 11 of the vacuum pot is formed at the top of the vacuum pot 10, and the inner container 200 and the outer container 100 are connected in a sealing way at the position of the pot opening 11. However, the present embodiment is not limited to only installing one inner container in the outer container, and two inner containers, three inner containers or more inner containers may be installed in one outer container, and the inner containers are spaced apart from each other, so as to achieve sealing between the inner containers.

Then, as shown in S1 of fig. 4: the bottom of the outer liner 100 is connected with the sealing sheet 300, and the sealing sheet 300 and the outer liner 100 form a whole, so that the inner liner 200 and the outer liner 100 are sealed, and a heat preservation effect is achieved. Specifically, the sealing sheet 300 is fixed to the inner wall of the outer container 100 by welding, forming a first welding line 12, and leaving a welding tail 110 at the bottom of the outer container 100. In this embodiment, the mode welded fastening that the gasket 300 passes through laser welding is in on the 100 inner walls of outer courage, and laser welding conveniently realizes, directly carries out laser welding with outer courage inner wall and gasket laminating, need not to align the border of gasket and the bottom border of outer courage and welds again. The laser welding method is only one specific embodiment of the present embodiment for welding and fixing the sealing sheet and the outer bladder, however, the present embodiment is not limited to the welding and fixing of the sealing sheet and the outer bladder by laser welding, and other sealing and fixing methods may be used.

Specifically, the edge of the sealing piece 300 is provided with a circle of folding pieces 310, as shown in fig. 2 and 3, the folding pieces 310 are formed by bending the edges of the sealing piece outwards, the folding pieces 310 are attached to the inner wall of the outer container 100, and during laser welding, the folding pieces are welded to the inner wall of the outer container, so that the sealing piece is fixed to the inner wall of the outer container. Therefore, the thickness and the height of the turnover can be adjusted according to the requirement, and the welding position is sealed and firm. Of course, the present embodiment may be configured without the fold.

In the embodiment, the high-energy laser beam during laser welding is used as a heat source, so that the welding is efficient, the welding precision is high, and the sealing effect is good during the welding of the turnover and the inner wall of the outer container. In the embodiment, when the laser welding is used for welding, the high-energy laser beam is used as a heat source for the turnover and the inner wall of the outer container, the surface of the turnover and the surface of the outer container are heated through heat conduction, namely laser radiation, the turnover and the surface of the outer container are diffused from the surface of the turnover and the surface of the outer container to the respective inner part through further conduction, the turnover and the outer container are melted by controlling the width, the energy, the peak power and the repetition frequency of laser pulse, a specific molten pool is formed, the turnover and the inner wall of the outer container are combined together, and the effects of fixed connection and.

The sealing sheet is welded on the inner wall, and meanwhile, the interval between the inner container and the outer container is subjected to air exhaust treatment, so that a vacuum environment is formed between the inner container and the outer container. This embodiment may employ a vacuum pump.

After the sealing piece is welded on the inner wall of the outer container, the welding position of the first welding line 12 is removed and polished after the sealing piece is to be turned over and the outer container is welded, so that the welding position is smooth and flat. Of course, it is also possible to perform polishing without polishing.

Then, as shown in S2 of fig. 4: the outer bottom cover 400 is welded to the rear wing 110 by means of argon arc welding to form a second welding line 13.

Specifically, the outer bottom cover 400 is welded to the tail fin 110 in an argon arc welding manner, and different welding lines are formed due to different welding positions in two times of welding, so that fine leakage cannot be generated at the welding positions, the sealing effect between the outer container 100 and the sealing sheet 300 of the vacuum pot 10 is ensured, and the heat preservation effect of the vacuum pot 10 is further ensured.

In addition, the outer bottom cover 400 and the tail fin 110 of the outer bladder 100 are welded and fixed in an argon arc welding manner, and the edge of the outer bottom cover 400 and the bottom edge of the outer bladder 100 need to be aligned with each other to realize welding in the welding process, that is, the edge of the outer bottom cover 400 and the edge of the tail fin 110 need to be aligned with each other to realize welding in the welding process, so that no interlayer or gap exists between the outer bottom cover 400 and the outer bladder 100, and the outer bottom cover 400 and the outer bladder 100 are tightly connected and firmly fixed to form an integral structure. Under the prerequisite that the outer courage of vacuum vessel is connected effectually with gasket and outer bottom closure sealing respectively like this, still conveniently wash vacuum vessel, and prevent inside liquid infiltration vacuum vessel, convenient production, use and carry.

In the embodiment, when argon arc welding is used for welding, argon protective gas is introduced around the arc welding to isolate air outside a welding area and prevent the oxidation of the welding area, and the argon arc welding is characterized in that on the basis of the principle of common arc welding, the outer bottom cover and the tail wing are protected by using argon, the outer bottom cover and the tail wing are fused together by high current, so that the tail wing and the outer bottom cover are metallurgically combined, and the aim of seamless welding is fulfilled. Because argon is continuously fed in the high-temperature fusion welding process, the outer bottom cover and the tail wing cannot be contacted with oxygen in the air, and the oxidation of the outer bottom cover and the tail wing is prevented. The current density is large, the heat is concentrated, the deposition rate is high, and the welding speed is high. And the welding quality is good, the efficiency is high, the welding is smooth and neat, and the phenomena of welding beading, incomplete penetration or sinking are not easy to generate.

The sealing piece, the outer bottom cover and the tail wing of the outer container are welded, and meanwhile, the space formed by the sealing piece, the outer bottom cover and the tail wing of the outer container is subjected to air exhaust treatment, so that the space formed by the outer bottom cover, the sealing piece and the tail wing is also changed into a vacuum environment, and the heat preservation effect of the vacuum kettle is further improved. This embodiment may employ a vacuum pump.

The vacuum kettle produced in the embodiment can not perform air exhaust treatment on the space formed by the sealing sheet, the tail fin and the outer bottom cover, and has the same heat insulation effect as that of the existing vacuum kettle. The preferred scheme of the embodiment is as follows: at first, the space air among the sealing sheet, the inner container and the outer container is pumped to form a vacuum environment, and then the space air formed by the sealing sheet, the tail fin and the outer bottom cover is pumped to form a vacuum environment, so that the heat preservation effect is further achieved, and the produced vacuum kettle is better than the heat preservation effect of the existing heat preservation kettle.

Finally, after the outer bottom cover 400 and the rear wing 110 are welded, the welding portion at the position of the second welding line 13 is removed and polished, so that the welding position is smooth and flat. This is a specific step of processing the vacuum pot in this embodiment, but the above steps are not limited thereto, and may be implemented by other steps.

In this embodiment, the sealing plate 300 and the outer bottom 400 are made of stainless steel, which has high strength, is not rusted, and has a long life. However, the material of the sealing sheet and the outer bottom cover in the present embodiment is not limited to the stainless material, and other metal materials may be used.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (10)

1. A processing method of a vacuum container is characterized in that:

the method comprises the steps of welding a sealing sheet and welding an outer bottom cover;

the sealing sheet is welded on the inner wall of the outer liner, and a welding tail wing is reserved at the bottom of the outer liner;

the outer bottom cover is welded on the tail wing in an argon arc welding mode, and the outer bottom cover is welded on the tail wing in a seamless mode through argon arc welding.

2. The method of manufacturing a vacuum vessel in accordance with claim, wherein the welding of the sealing sheet is performed by laser welding the sealing sheet to the inner wall of the outer vessel.

3. The method of manufacturing a vacuum vessel as claimed in claim 1, wherein the step of welding the outer bottom cover removes a welding mark after welding the outer bottom cover to the outer container.

4. The method of manufacturing a vacuum vessel as claimed in claim 1 or 2, wherein the edge of the sealing piece is provided with a turn-up, and the sealing piece is welded by welding the turn-up to the inner wall of the outer container.

5. The method of manufacturing a vacuum vessel as claimed in claim 1 or 2, wherein the step of welding the outer bottom cover aligns a rim of the tail with a rim of the outer bottom cover before welding the outer bottom cover to the tail.

6. A vacuum container comprises an outer container, an inner container and a sealing sheet, wherein the inner container is arranged in the outer container and used for containing liquid, the outer wall of the inner container and the inner wall of the outer container are mutually spaced, and the top of the inner container and the top of the outer container are mutually connected in a sealing manner;

the vacuum container still includes outer bottom, outer bottom welds through the mode welding that argon arc welded on the fin, and outer bottom welds seamless welding through argon arc on the fin.

7. The vacuum vessel according to claim 6, wherein said sealing sheet is welded and fixed to the inner wall of said outer vessel by laser welding.

8. The vacuum vessel according to claim 6 or 7, wherein the edge of the sealing sheet is provided with a turn-up, and the turn-up is welded to the inner wall of the outer container, so that the sealing sheet is fixed on the inner wall of the outer container.

9. The vacuum vessel of claim 6, wherein the sealing sheet is a stainless steel material.

10. The vacuum vessel of claim 6, wherein the outer bottom cover is made of stainless steel.