CN108216943B - Preparation method of heat-insulating container with good air tightness and heat-insulating container prepared by same - Google Patents
Preparation method of heat-insulating container with good air tightness and heat-insulating container prepared by same Download PDFInfo
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- CN108216943B CN108216943B CN201711482309.9A CN201711482309A CN108216943B CN 108216943 B CN108216943 B CN 108216943B CN 201711482309 A CN201711482309 A CN 201711482309A CN 108216943 B CN108216943 B CN 108216943B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
- B65D81/3837—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a bottle, jar or like container
- B65D81/3841—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation rigid container in the form of a bottle, jar or like container formed with double walls, i.e. hollow
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Abstract
The invention discloses a preparation method of a heat-insulating container with good air tightness and the heat-insulating container prepared by the same.A preparation auxiliary part is formed by overlapping and welding a low-temperature sealing layer and a high-temperature covering layer, wherein the low-temperature sealing layer is made of metal which can be melted at the melting temperature, and the high-temperature covering layer is made of metal which can not be melted at the melting temperature; an auxiliary member is fixed at a corner position of the inside of the outer shell of the heat-insulating container. The whole low-temperature sealing layer is sealed between the corner position of the inner side of the shell and the high-temperature covering layer, so that the high-temperature covering layer is always attached to the low-temperature sealing layer under the action of gravity, and cracks are avoided; only the auxiliary part is fixed at the corner position of the inner side of the shell, so that the low-temperature sealing layer can be prevented from being separated from the high-temperature covering layer in the melting process, and the edge of the high-temperature covering layer is not required to be welded with the shell; the auxiliary member arranged inside is not directly contacted with the collision in the collision, and is not easy to be collided, so that the vacuum leakage caused by the collision is not easy to occur.
Description
Technical Field
The invention relates to the field of vacuum heat-insulating containers, in particular to a heat-insulating container with good air tightness and a preparation method thereof.
Background
The existing tailless vacuum heat-insulating container manufacturing method is that glass cement is adopted to seal a cavity outside a container body at the bottom of the container body, however, the container body is made of metal materials, and the glass cement is made of non-metal materials, so the fusion degree and the adhesion degree of the glass cement and the container body are not good, the glass cement is easy to crack due to high temperature or vibration, the glass cement is easy to drop after long-time use, air enters a heat-insulating cavity, the vacuum heat-insulating container is not heat-insulated, and the service life of the vacuum heat-insulating container is greatly shortened. If the glass cement is replaced by a low-temperature metal material, the low-temperature metal material is easily oxidized during vacuum heating to generate crack gaps, so that the problem of gas leakage is caused, and the gas tightness is poor.
Disclosure of Invention
The invention aims to provide a heat-insulating container with good air tightness and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a heat preservation container with good air tightness is provided, the heat preservation container is formed by vacuumizing between an outer shell and an inner shell which are made of metal, and a sealed vacuum heat preservation cavity is formed between the outer shell and the inner shell, and the preparation method comprises the following steps:
step A, preparing an auxiliary piece, wherein the auxiliary piece is formed by overlapping and welding a low-temperature sealing layer and a high-temperature covering layer, the low-temperature sealing layer is made of metal which can be melted at the melting temperature, and the high-temperature covering layer is made of metal which can not be melted at the melting temperature;
step B, fixing the auxiliary piece at the corner position of the inner side of the shell of the heat-insulating container, and enabling the low-temperature sealing layer to face the shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the shell;
step C, drilling an exhaust hole through the auxiliary part and the shell;
step D, mounting the inner shell in the outer shell, thereby forming the heat preservation cavity between the outer shell and the inner shell;
step E, enabling the low-temperature sealing layer to be arranged below and the high-temperature covering layer to be arranged above, then placing the heat-preservation container in a vacuumizing chamber, and gradually enabling the vacuumizing chamber to be in a vacuum state so as to vacuumize the heat-preservation cavity through the exhaust hole;
and simultaneously, the temperature of the vacuum pumping chamber is gradually increased to the melting temperature, and the low-temperature sealing layer is heated and melted to flow until the exhaust hole is sealed, so that the heat-insulating container is manufactured.
Preferably, the low-temperature sealing layer is a metal material with a melting point of 200-1200 ℃;
the high-temperature covering layer is made of titanium metal or stainless steel;
the shell is made of titanium metal or stainless steel;
said melting temperature of said step E does not exceed 1200 ℃.
Preferably, in the step B, the auxiliary member is fixed at a corner position of an inner side of a bottom of an outer shell of the heat-insulating container, and the low-temperature sealing layer faces the bottom of the outer shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the outer shell;
in the step E, the bottom of the shell is placed downwards in a vacuum-pumping chamber.
Preferably, in the step B, the auxiliary member is fixed at a corner position of an inner side of a side wall of an outer shell of the heat-insulating container, and the low-temperature sealing layer faces the side wall of the outer shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the outer shell;
in the step E, the side of the side wall of the housing to which the auxiliary member is welded is placed in a vacuum chamber facing downward.
Preferably, in the step B, the auxiliary member is fixed at a corner position of an inner side of a top portion of an outer shell of the heat-insulating container, and the low-temperature sealing layer faces the top portion of the outer shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the outer shell;
in the step E, the top of the shell is placed downwards in a vacuum-pumping chamber.
Preferably, the heat-insulating container prepared by the heat-insulating container preparation method with good air tightness comprises the following steps:
the heat preservation container is formed by vacuumizing between an outer shell and an inner shell which are made of metal, and a sealed vacuum heat preservation cavity is formed between the outer shell and the inner shell;
the auxiliary piece is fixed at the corner position of the inner side of the shell, the low-temperature sealing layer faces the shell, and therefore the low-temperature sealing layer is fixed between the high-temperature covering layer and the shell;
the housing is provided with the exhaust hole, the auxiliary covers the exhaust hole, and the low-temperature sealing layer seals the exhaust hole.
Preferably, the auxiliary piece is arranged in the heat preservation cavity, the auxiliary piece is fixed on the edge of the bottom of the shell, and the low-temperature sealing layer is tightly attached to the inner surface of the shell; the auxiliary member covers the exhaust hole, and the low-temperature sealing layer seals the exhaust hole.
Preferably, the bottom of the housing is provided with an exhaust groove, the exhaust groove protrudes from the inside to the outside, and the exhaust hole of the housing is arranged in the exhaust groove;
the auxiliary piece is fixed in the exhaust groove, and the low-temperature sealing layer seals the exhaust hole.
Preferably, the auxiliary member is disposed in the vacuum insulation chamber, an opening is disposed at a top of the housing, the opening is curved, the opening is provided with an exhaust hole, the auxiliary member is fixed to the opening of the housing, the auxiliary member covers the exhaust hole, the low-temperature sealing layer is disposed between the high-temperature covering layer and the opening, and the low-temperature sealing layer seals the exhaust hole.
Preferably, the side wall of the housing is provided with an exhaust groove, the exhaust groove protrudes from the inside to the outside, and the exhaust hole of the housing is arranged in the exhaust groove;
the auxiliary member is fixed to the exhaust groove, a high-temperature covering layer of the auxiliary member covers the entire exhaust groove from the inner side of the housing, and the low-temperature sealing layer seals the exhaust hole.
In the preparation method of the heat-insulating container with good air tightness, the auxiliary piece is fixed at the corner position of the inner side of the shell of the heat-insulating container in a welding, adhering and other fixing modes, and the auxiliary piece is formed by welding the low-temperature sealing layer and the high-temperature covering layer. When the heating evacuation, will heat preservation container's welding carries out the evacuation downwards one side of auxiliary member, makes after the heat preservation chamber has taken out the vacuum, heat gradually extremely melting temperature, the low temperature sealing layer melts and takes place to flow under the action of gravity between the corner position of high temperature overburden and shell to the shutoff is carried out to the exhaust hole to the low temperature sealing layer that melts, and recooling is to the normal atmospheric temperature makes the solidification of low temperature sealing layer, thereby makes vacuum heat retaining heat preservation container. The heat-insulating container can be a vacuum flask, a vacuum cup, a vacuum heat-insulating box and the like, and can be vacuumized by adopting high-vacuum brazing equipment.
The short plate with the sealing effect of the heat-insulating container is an unpredictable potential crack caused by the phase change of the low-temperature sealing layer in the melting process, and once the crack is generated, the heat-insulating cavity can secretly lose the vacuum effect gradually. The high-temperature covering layer which does not generate phase change at the melting temperature is additionally arranged on the outer side of the low-temperature sealing layer, and the whole low-temperature sealing layer is sealed between the corner position of the inner side of the shell and the high-temperature covering layer, so that the high-temperature covering layer is always attached to the low-temperature sealing layer under the action of gravity, and cracks are avoided;
the processing steps are few, the low-temperature sealing layer can be prevented from being separated from the high-temperature covering layer in the melting process only by fixing the auxiliary part at the corner position of the inner side of the shell, and the edge of the high-temperature covering layer is not required to be welded with the shell;
the shell and the high-temperature covering layer are both provided with the exhaust holes, the two exhaust holes can be sealed by the phase change of the low-temperature sealing layer, and the effect of thorough vacuum sealing can be achieved by sealing any one of the two exhaust holes, so that the vacuum leakage probability of the heat-insulating container is greatly reduced, the yield is higher, and the product is more durable;
because the auxiliary part is arranged on the inner side of the shell (namely in the heat preservation cavity), the position of the auxiliary part can not be seen from the outside of the manufactured heat preservation container, and the heat preservation container is more attractive; in addition, the auxiliary parts arranged inside are not in direct contact with each other in the collision process and are not easy to be knocked off, so that the vacuum leakage caused by the collision is not easy to occur.
Therefore, the invention prepares a novel heat-insulating container, the auxiliary element for blocking the vent hole is provided with two layers of different metals (a low-temperature sealing layer and a high-temperature covering layer), the metal for blocking the vent hole is the metal which can be melted at the melting temperature, and the other layer of metal can not be melted at the melting temperature.
Drawings
The drawings are further illustrative of the invention and the content of the drawings does not constitute any limitation of the invention.
FIG. 1 is a schematic view of the internal structure of a thermal container according to one embodiment of the present invention;
FIG. 2 is a flow diagram of a bottom evacuation process in accordance with one embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of the insulated container according to one embodiment of the present invention;
FIG. 4 is a flow diagram of a bottom evacuation process in accordance with one embodiment of the present invention;
FIG. 5 is a flow diagram of a bottom evacuation process in accordance with one embodiment of the present invention;
FIG. 6 is a flow chart of a bottom evacuation process according to one embodiment of the present invention;
FIG. 7 is a schematic view of the internal structure of the insulated container according to one embodiment of the present invention;
FIG. 8 is a flow chart of a top evacuation process according to one embodiment of the present invention;
FIG. 9 is a flow diagram of a top evacuation process in accordance with one embodiment of the present invention;
FIG. 10 is a flow chart of a top evacuation process according to one embodiment of the present invention;
FIG. 11 is a side wall evacuation front structure view of one embodiment of the present invention;
FIG. 12 is a view of the side wall of one embodiment of the present invention after evacuation;
FIG. 13 is a side wall evacuation front block diagram of one embodiment of the present invention;
FIG. 14 is a diagram of the structure of the side wall of one embodiment of the present invention after evacuation.
Wherein: an auxiliary member 1; a low-temperature seal layer 11; a high temperature blanket layer 12; a housing 2; an inner shell 3; a heat preservation cavity 4; an exhaust hole 13; an exhaust groove 21; an opening 22.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1, the method for manufacturing a heat preservation container with good air tightness is a heat preservation container formed by vacuumizing between an outer shell 2 and an inner shell 3 made of metal, and a sealed vacuum heat preservation cavity 4 is formed between the outer shell 2 and the inner shell 3, and includes the following steps:
step A, preparing an auxiliary part 1, wherein the auxiliary part 1 is formed by overlapping and welding a low-temperature sealing layer 11 and a high-temperature covering layer 12, the low-temperature sealing layer 11 is made of metal which can be melted at a melting temperature, and the high-temperature covering layer 12 is made of metal which can not be melted at the melting temperature;
step B, fixing the auxiliary member 1 at a corner position of the inner side of the outer shell 2 of the heat-insulating container, and enabling the low-temperature sealing layer 11 to face the outer shell 2, so that the low-temperature sealing layer 11 is fixed between the high-temperature covering layer 12 and the outer shell 2;
step C, drilling an exhaust hole 13 through the auxiliary part 1 and the shell 2;
step D, mounting the inner shell 3 in the outer shell 2, thereby forming the heat preservation cavity 4 between the outer shell 2 and the inner shell 3;
step E, enabling the low-temperature sealing layer 11 to be arranged below and the high-temperature covering layer 12 to be arranged above, and then placing the heat-preservation container in a vacuum-pumping chamber, wherein the vacuum-pumping chamber gradually turns to a vacuum state so as to pump the heat-preservation chamber 4 to be vacuum through the exhaust hole 13;
and simultaneously, the temperature of the vacuum pumping chamber is gradually increased to the melting temperature, and the low-temperature sealing layer 11 is heated and melted to flow until the exhaust hole 13 is sealed, so that the heat-insulating container is manufactured.
In the preparation method of the heat preservation container with good air tightness, the auxiliary part 1 is fixed at the corner position of the inner side of the shell 2 of the heat preservation container in a welding, adhering and other fixing modes, and the auxiliary part 1 is formed by welding the low-temperature sealing layer 11 and the high-temperature covering layer 12. When the heating evacuation, will heat preservation container's welding carries out the evacuation downwards one side of auxiliary member 1, makes after heat preservation chamber 4 has taken out the vacuum, heat gradually extremely melting temperature, low temperature sealing layer 11 melts and takes place to flow under the action of gravity between the corner position of high temperature overburden 12 and shell 2 to the shutoff is carried out to exhaust hole 13 to the low temperature sealing layer 11 that melts, and recooling makes low temperature sealing layer 11 solidification to the normal atmospheric temperature, thereby makes vacuum heat retaining heat preservation container. The heat-insulating container can be a vacuum flask, a vacuum cup, a vacuum heat-insulating box and the like, and can be vacuumized by adopting high-vacuum brazing equipment.
The short plate of the sealing effect of the heat preservation container is an unexpected potential crack caused by the phase change of the low-temperature sealing layer 11 in the melting process, and once the crack is generated, the heat preservation cavity 4 can secretly lose the vacuum effect gradually. In the invention, the high-temperature covering layer 12 which does not generate phase change at the melting temperature is additionally arranged on the outer side of the low-temperature sealing layer 11, and the whole low-temperature sealing layer 11 is sealed between the corner position of the inner side of the shell 2 and the high-temperature covering layer 12, so that the high-temperature covering layer 12 is always attached to the low-temperature sealing layer 11 under the action of gravity, and the generation of cracks is avoided;
the processing steps are few, the low-temperature sealing layer 11 can be prevented from being separated from the high-temperature covering layer 12 in the melting process only by fixing the auxiliary part 1 at the corner position of the inner side of the shell 2, and the edge of the high-temperature covering layer 12 is not required to be welded with the shell 2;
the shell 2 and the high-temperature covering layer 12 are both provided with the exhaust holes 13, the two exhaust holes 13 can be sealed by the phase change of the low-temperature sealing layer 11, and the effect of thorough vacuum sealing can be achieved by sealing any one of the two exhaust holes 13, so that the vacuum leakage probability of the heat-insulating container is greatly reduced, the yield is higher, and the product is more durable;
because the auxiliary part 1 is arranged on the inner side of the shell 2 (namely in the heat preservation cavity 4), the position of the auxiliary part 1 can not be seen from the outside of the manufactured heat preservation container, and the appearance is more attractive; in addition, the auxiliary member 1 provided inside is not in direct contact with the collision during the collision, and is not easily knocked off, so that vacuum leakage due to the collision is not easily caused.
Therefore, the invention prepares a novel heat-insulating container, the auxiliary member 1 for blocking the vent hole 13 has two layers of different metals (a low-temperature sealing layer 11 and a high-temperature covering layer 12), the metal for blocking the vent hole 13 is the metal which can be melted at the melting temperature, and the other layer of metal can not be melted at the melting temperature.
Preferably, the low-temperature sealing layer 11 is a metal material with a melting point of 200-1200 ℃;
the high-temperature covering layer 12 is made of titanium metal or stainless steel;
the shell 2 is made of titanium metal or stainless steel;
said melting temperature of said step E does not exceed 1200 ℃.
The low-temperature sealing layer 11 is made of a metal material with a melting point of 200-1200 ℃, and compared with solid glass cement, the low-temperature sealing layer 11 made of the metal material is not easy to crack and high in strength, has better fusion degree with the shell 2 made of the metal material and is not easy to fall off; preferably, the low-temperature sealing layer 11 is made of an aluminum alloy or a copper alloy. The melting point of the aluminum alloy is within the range of 500-700 ℃, the melting point of the copper alloy is within the range of 800-900 ℃, the melting point temperature is moderate, and the fusion degree with the shell 2 made of the metal material is better and is not easy to fall off.
The high temperature covering layer 12 and the housing 2 may be made of the same metal material or different metal materials. The melting point of the titanium metal is 1668 ℃, the melting point of the stainless steel is above 1200 ℃, therefore, the melting points of the titanium metal and the stainless steel are higher than that of the low-temperature sealing layer 11, when the melting point of the low-temperature sealing layer 11 is reached, the low-temperature sealing layer 11 is melted, and the shell 2 and the high-temperature covering layer 12 which are made of the titanium metal or the stainless steel at the moment far do not reach the melting points of the low-temperature sealing layer 11, so that the low-temperature sealing layer 11 flows in the cavity between the high-temperature covering layer 12 and the shell 2.
Moreover, the titanium metal or the stainless steel is firm and solid, is collision-resistant and wear-resistant, is not easy to crack, avoids scalding caused by cracking and has long service life. Titanium metal also has bactericidal effect. Therefore, the high-temperature covering layer 12 made of titanium metal or stainless steel has stable physical property and chemical property, the low-temperature sealing layer 11 in the cavity is not easy to be oxidized to generate cracks and gaps during vacuumizing, the problem of air leakage of a finished product is avoided, and the finished product rate and the air tightness are improved.
The melting temperature of the vacuumization is required to exceed the melting point of the low-temperature sealing layer 11, but not to exceed 1200 ℃, so that the low-temperature sealing layer 11 can be used for melting and sealing the exhaust hole 13, and the phenomenon that the high-temperature covering layer 12 is melted due to overhigh temperature to influence the sealing effect is avoided.
Preferably, as shown in fig. 2, in the step B, the auxiliary member 1 is fixed at a corner position of the inner side of the bottom of the outer shell 2 of the heat-insulating container, and the low-temperature-sealing layer 11 faces the bottom of the outer shell 2, so that the low-temperature-sealing layer 11 is fixed between the high-temperature covering layer 12 and the outer shell 2;
in the step E, the bottom of the housing 2 is placed downward in the vacuum chamber.
The auxiliary part 1 can be fixed at the corner position of the inner side of the bottom of the shell 2, and the bottom of the shell 2 is placed downwards in a vacuumizing chamber for vacuumizing and heating during vacuumizing, so that air in the heat preservation cavity 4 can be completely pumped out, the heat preservation cavity 4 is completely vacuumized, and the heat preservation quality is improved.
Preferably, in the step B, the auxiliary member 1 is fixed at a corner position of the inner side of the side wall of the outer shell 2 of the heat-insulating container, and the low-temperature sealing layer 11 faces the side wall of the outer shell 2, so that the low-temperature sealing layer 11 is fixed between the high-temperature covering layer 12 and the outer shell 2;
in the step E, the side of the side wall of the housing 2 to which the auxiliary 1 is welded is placed in a vacuum chamber facing downward.
The auxiliary part 1 can be fixed at the corner position of the inner side of the side wall of the shell 2, the heat-insulating container is laterally placed during vacuum pumping, namely, one side of the side wall of the shell 2, which is welded with the auxiliary part 1, is placed into a vacuum pumping chamber downwards for vacuum pumping and heating, so that air in the heat-insulating cavity 4 can be completely pumped out, the heat-insulating cavity 4 is completely vacuum, and the heat-insulating quality is improved.
Preferably, in the step B, the auxiliary member 1 is fixed at a corner position of the inner side of the top of the outer shell 2 of the heat-insulating container, and the low-temperature sealing layer 11 faces the top of the outer shell 2, so that the low-temperature sealing layer 11 is fixed between the high-temperature covering layer 12 and the outer shell 2;
in the step E, the housing 2 is placed in the vacuum chamber with its top facing downward.
Can be fixed in auxiliary member 1 the inboard corner position of the top of shell 2, will during the evacuation the heat preservation container top is down put into the evacuation room and is carried out the evacuation and heat to the air in heat preservation chamber 4 can be extracted out completely, and heat preservation chamber 4 realizes complete vacuum, improves the heat preservation quality.
Preferably, the heat-insulating container prepared by the heat-insulating container preparation method with good air tightness comprises the following steps:
the heat preservation container is formed by vacuumizing between an outer shell 2 and an inner shell 3 which are made of metal, and a sealed vacuum heat preservation cavity 4 is formed between the outer shell 2 and the inner shell 3;
the auxiliary member 1 is fixed at the corner position of the inner side of the outer shell 2, the low-temperature sealing layer 11 faces the outer shell 2, and thus the low-temperature sealing layer 11 is fixed between the high-temperature covering layer 12 and the outer shell 2;
the housing 2 is provided with the exhaust hole 13, the auxiliary 1 covers the exhaust hole 13, and the low-temperature sealing layer 11 seals the exhaust hole 13.
The auxiliary piece 1 is fixed at the corner position of the inner side of the shell 2 of the heat-insulating container in a welding, adhering and the like mode, and the auxiliary piece 1 is formed by welding a low-temperature sealing layer 11 and a high-temperature covering layer 12.
Before heating and vacuumizing, a vent hole 13 is drilled through the auxiliary part 1 and the shell 2; when the heating evacuation, will heat preservation container's welding carries out the evacuation downwards one side of auxiliary member 1, makes after heat preservation chamber 4 has taken out the vacuum, heat gradually extremely melting temperature, low temperature sealing layer 11 melts and takes place to flow under the action of gravity between the corner position of high temperature overburden 12 and shell 2 to the shutoff is carried out to exhaust hole 13 to the low temperature sealing layer 11 that melts, and recooling makes low temperature sealing layer 11 solidification to the normal atmospheric temperature, thereby makes vacuum heat retaining heat preservation container. The heat-insulating container can be a vacuum flask, a vacuum cup, a vacuum heat-insulating box and the like, and can be vacuumized by adopting high-vacuum brazing equipment.
The short plate of the sealing effect of the heat preservation container is an unexpected potential crack caused by the phase change of the low-temperature sealing layer 11 in the melting process, and once the crack is generated, the heat preservation cavity 4 can secretly lose the vacuum effect gradually. In the invention, the high-temperature covering layer 12 which does not generate phase change at the melting temperature is additionally arranged on the outer side of the low-temperature sealing layer 11, and the whole low-temperature sealing layer 11 is sealed between the corner position of the inner side of the shell 2 and the high-temperature covering layer 12, so that the high-temperature covering layer 12 is always attached to the low-temperature sealing layer 11 under the action of gravity, and the generation of cracks is avoided;
the processing steps are few, the low-temperature sealing layer 11 can be prevented from being separated from the high-temperature covering layer 12 in the melting process only by fixing the auxiliary part 1 at the corner position of the inner side of the shell 2, and the edge of the high-temperature covering layer 12 is not required to be welded with the shell 2;
the shell 2 and the high-temperature covering layer 12 are both provided with the exhaust holes 13, the two exhaust holes 13 can be sealed by the phase change of the low-temperature sealing layer 11, and the effect of thorough vacuum sealing can be achieved by sealing any one of the two exhaust holes 13, so that the vacuum leakage probability of the heat-insulating container is greatly reduced, the yield is higher, and the product is more durable;
because the auxiliary part 1 is arranged on the inner side of the shell 2 (namely in the heat preservation cavity 4), the position of the auxiliary part 1 can not be seen from the outside of the manufactured heat preservation container, and the appearance is more attractive; in addition, the auxiliary member 1 provided inside is not in direct contact with the collision during the collision, and is not easily knocked off, so that vacuum leakage due to the collision is not easily caused.
Preferably, as shown in fig. 1, the auxiliary member 1 is disposed in the insulating chamber 4, the auxiliary member 1 is fixed to the edge of the bottom of the outer shell 2, and the low-temperature sealing layer 11 is in close contact with the inner surface of the outer shell 2; the auxiliary member 1 covers the exhaust hole 13, and the low-temperature sealing layer 11 seals the exhaust hole 13.
As shown in fig. 2, the auxiliary member 1 may be fixed to the edge of the bottom of the housing 2 by welding or bonding, the edge of the bottom of the housing 2 is a corner position, and the low temperature sealing layer 11 is closely attached to the inner surface of the housing 2, the low temperature sealing layer 11 is disposed between the high temperature covering layer 12 and the edge of the bottom of the housing 2, before heating and vacuum pumping, an exhaust hole 13 is drilled through the auxiliary member 1 and the housing 2, and a plurality of exhaust holes 13 may be disposed along the edge of the bottom of the housing 2, so as to improve the vacuum pumping rate and quality. When heating and vacuumizing, the heat preservation container is placed rightly, namely the bottom of the shell 2 is placed downwards into high-vacuum brazing equipment for vacuumizing and heating, air in the heat preservation cavity 4 is completely pumped out of the heat preservation cavity 4 through the exhaust hole 13 under the action of gravity and a vacuum environment, and the heat preservation cavity 4 is completely vacuumized; and when the heating temperature reaches the melting temperature, the low-temperature sealing layer 11 is melted and flows, so that the melted low-temperature sealing layer 11 blocks the exhaust holes 13 of the shell 2, and then the shell is cooled to the normal temperature to solidify the low-temperature sealing layer 11, so that the vacuum heat-insulating container is prepared.
Preferably, as shown in fig. 3, the bottom of the housing 2 is provided with a vent groove 21, the vent groove 21 protrudes from the inside to the outside, and the vent hole 13 of the housing 2 is provided in the vent groove 21; the auxiliary member 1 is fixed in the exhaust groove 21, and the low-temperature sealing layer 11 seals the exhaust hole 13.
As shown in fig. 4, the auxiliary member 1 may be fixed to the exhaust groove 21 by clamping or welding, so that the low temperature sealing layer 11 is wrapped in the cavity between the high temperature covering layer 12 and the exhaust groove 21, and before heating and vacuum-pumping, the exhaust hole 13 is drilled through the auxiliary member 1 and the housing 2; when heating and vacuumizing, the heat preservation container is placed rightly, namely the bottom of the shell 2 is placed downwards into high-vacuum brazing equipment for vacuumizing and heating, air in the heat preservation cavity 4 is completely pumped out of the heat preservation cavity 4 through the exhaust hole 13 under the action of gravity and a vacuum environment, and the heat preservation cavity 4 is completely vacuumized; and when the heating temperature reaches the melting temperature, the low-temperature sealing layer 11 is melted and flows to the bottom of the exhaust groove 21 under the action of gravity, so that the melted low-temperature sealing layer 11 plugs the exhaust holes 13 of the exhaust groove 21, and the low-temperature sealing layer 11 is solidified after being cooled to the normal temperature, thereby preparing the vacuum heat-insulating container.
Preferably, as shown in fig. 5 and 6, the bottom of the housing 2 is provided with a plurality of exhaust grooves 21 having a small surface area. Set up the less exhaust recess 21 of a plurality of surface areas, both avoided leading to low temperature seal layer 11 to flow inhomogeneous or thickness undersize and can not be with exhaust hole 13 complete sealing because of the surface area is great, bore out a plurality of exhaust holes 13 in the bottom of shell 2 again, the air in the heat preservation chamber 4 can be discharged through a plurality of exhaust holes 13 during the evacuation, thereby improve evacuation speed, and ensure that the air is taken out completely, avoid partial air to remain in heat preservation chamber 4, improve the evacuation quality.
Preferably, as shown in fig. 7, the auxiliary member 1 is disposed in the vacuum insulation chamber 4, an opening 22 is disposed at the top of the housing 2, the opening 22 is curved, the opening 22 is provided with a vent hole 13, the auxiliary member 1 is fixed to the opening 22 of the housing 2, the auxiliary member 1 covers the vent hole 13, the low temperature sealing layer 11 is disposed between the high temperature covering layer 12 and the opening 22, and the low temperature sealing layer 11 seals the vent hole 13.
As shown in fig. 8 to 10, the auxiliary element 1 can be fixed to the opening 22 at the top of the outer casing 2 by welding or bonding, the auxiliary element 1 can be fixed laterally or vertically to the edge or sidewall of the opening 22, and the low-temperature sealing layer 11 and the inner surface of the outer casing 2 are attached tightly, and before heating and vacuum-pumping, the vent hole 13 is drilled through the auxiliary element 1 and the outer casing 2; when heating and vacuumizing, the heat preservation container is placed upside down, namely the top of the shell 2 is placed downwards into high-vacuum brazing equipment for vacuumizing and heating, air in the heat preservation cavity 4 is completely extracted from the heat preservation cavity 4 through the exhaust hole 13 under the action of gravity and a vacuum environment, and the heat preservation cavity 4 is completely vacuumized; and when the heating temperature reaches the melting temperature, the low-temperature sealing layer 11 is melted and flows, so that the melted low-temperature sealing layer 11 blocks the exhaust hole 13 of the shell 2, and then the low-temperature sealing layer 11 is solidified after being cooled to the normal temperature, so that the vacuum heat-insulating container is prepared.
Preferably, as shown in fig. 12, the side wall of the housing 2 is provided with a vent groove 21, the vent groove 21 protrudes from the inside to the outside, and the vent hole 13 of the housing 2 is provided in the vent groove 21; the auxiliary member 1 is fixed to the exhaust groove 21, the high-temperature covering layer 12 of the auxiliary member 1 covers the entire exhaust groove 21 from the inside of the housing 2, and the low-temperature sealing layer 11 seals the exhaust hole 13.
The auxiliary member 1 can be fixed to the exhaust groove 21 by welding or bonding, so that the low-temperature sealing layer 11 is wrapped in the cavity between the high-temperature covering layer 12 and the exhaust groove 21, and before heating and vacuumizing, an exhaust hole 13 is drilled through the auxiliary member 1 and the shell 2, as shown in fig. 11; when heating and vacuumizing, one side of the side wall of the shell 2, which is welded with the auxiliary part 1, is placed downwards into high-vacuum brazing equipment for vacuumizing and heating, air in the heat preservation cavity 4 is completely pumped out of the heat preservation cavity 4 through the exhaust hole 13 under the action of gravity and a vacuum environment, and the heat preservation cavity 4 is completely vacuumized; and when the heating temperature reaches the melting temperature, the low-temperature sealing layer 11 is melted, flows between the high-temperature covering layer 12 and the shell 2 under the action of gravity, so that the melted low-temperature sealing layer 11 plugs the exhaust holes 13 of the exhaust grooves 21, and is cooled to the normal temperature to solidify the low-temperature sealing layer 11, thereby preparing the vacuum heat-insulating container.
Preferably, as shown in fig. 11, the exhaust grooves 21 are provided on both sides of the side wall of the housing 2. The relative setting of exhaust recess 21 of the lateral wall both sides of shell 2, thereby put the insulated container side during the evacuation, one of them one side of welding of the lateral wall of shell 2 has auxiliary member 1 to put into high vacuum brazing equipment downwards and carry out the evacuation and heat, the air that is located the below is taken out from exhaust hole 13 of exhaust recess 21 down, the air that is located the top is taken out from exhaust hole 13 of exhaust recess 21 up, thereby the air that is located the lateral wall when guaranteeing the insulated container side to put is taken out completely, avoid partial air to remain in heat preservation chamber 4, improve the evacuation quality. And when the heating temperature reaches the melting point of the melting temperature, the low-temperature sealing layer 11 is melted, under the action of gravity, the low-temperature sealing layer 11 in the lower exhaust groove 21 seals the exhaust holes 13 of the exhaust groove 21, the low-temperature sealing layer 11 in the upper exhaust groove 21 seals the exhaust holes 13 of the high-temperature covering layer 12, and the low-temperature sealing layer 11 is solidified after being cooled to the normal temperature, so that the vacuum heat-insulating container is prepared.
Preferably, as shown in fig. 13 and 14, the exhaust groove 21 of the side wall of the housing 2 protrudes from the inside to the outside, and the middle part of the exhaust groove 21 is recessed inwards and the edge protrudes outwards, and the exhaust hole 13 of the bottom of the housing 2 is arranged near the edge of the exhaust groove 21; the auxiliary member 1 is fixed to the exhaust groove 21, the high-temperature covering layer 12 of the auxiliary member 1 covers the entire exhaust groove 21, and the low-temperature sealing layer 11 seals the exhaust hole 13. The middle part of the exhaust groove 21 of the side wall of the shell 2 is inwards sunken, the edge is outwards protruded, one side of the side wall of the shell 2, which is welded with the auxiliary part 1, is downwards in vacuum pumping, so that the melted low-temperature sealing layer 11 after vacuum pumping is easier to flow from the middle part of the exhaust groove 21 to the edge under the action of gravity, and the exhaust hole 13 on the exhaust groove 21 is blocked, and the blocking is more reliable.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. A preparation method of a heat preservation container with good air tightness is characterized in that the heat preservation container is formed by vacuumizing between an outer shell and an inner shell which are made of metal, and a sealed vacuum heat preservation cavity is formed between the outer shell and the inner shell, and the preparation method comprises the following steps:
step A, preparing an auxiliary piece, wherein the auxiliary piece is formed by overlapping and welding a low-temperature sealing layer and a high-temperature covering layer, the low-temperature sealing layer is made of metal which can be melted at the melting temperature, and the high-temperature covering layer is made of metal which can not be melted at the melting temperature;
step B, fixing the auxiliary piece at the corner position of the inner side of the shell of the heat-insulating container, and enabling the low-temperature sealing layer to face the shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the shell;
step C, drilling an exhaust hole through the auxiliary part and the shell;
step D, mounting the inner shell in the outer shell, thereby forming the heat preservation cavity between the outer shell and the inner shell;
step E, enabling the low-temperature sealing layer to be arranged below and the high-temperature covering layer to be arranged above, then placing the heat-preservation container in a vacuumizing chamber, and gradually enabling the vacuumizing chamber to be in a vacuum state so as to vacuumize the heat-preservation cavity through the exhaust hole;
simultaneously, the temperature of the vacuum pumping chamber is gradually increased to the melting temperature, and the low-temperature sealing layer is heated and melted to flow until the exhaust hole is sealed, so that the heat-preservation container is manufactured;
the low-temperature sealing layer is made of a metal material with a melting point of 200-1200 ℃;
the high-temperature covering layer is made of titanium metal or stainless steel;
the shell is made of titanium metal or stainless steel;
said melting temperature of said step E does not exceed 1200 ℃.
2. The method for preparing the heat-insulating container with good air tightness as claimed in claim 1, wherein the method comprises the following steps:
in the step B, the auxiliary piece is fixed at the corner position of the inner side of the bottom of the outer shell of the heat-insulating container, the low-temperature sealing layer faces the bottom of the outer shell, and therefore the low-temperature sealing layer is fixed between the high-temperature covering layer and the outer shell;
in the step E, the bottom of the shell is placed downwards in a vacuum-pumping chamber.
3. The method for preparing the heat-insulating container with good air tightness as claimed in claim 1, wherein the method comprises the following steps:
in the step B, the auxiliary piece is fixed at the corner position of the inner side of the side wall of the shell of the heat-insulating container, and the low-temperature sealing layer faces the side wall of the shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the shell;
in the step E, the side of the side wall of the housing to which the auxiliary member is welded is placed in a vacuum chamber facing downward.
4. The method for preparing the heat-insulating container with good air tightness as claimed in claim 1, wherein the method comprises the following steps:
in the step B, the auxiliary piece is fixed at the corner position of the inner side of the top of the outer shell of the heat-insulating container, and the low-temperature sealing layer faces the top of the outer shell, so that the low-temperature sealing layer is fixed between the high-temperature covering layer and the outer shell;
in the step E, the top of the shell is placed downwards in a vacuum-pumping chamber.
5. The heat-insulating container manufactured by the method for manufacturing a heat-insulating container with good airtightness according to any one of claims 1 to 4, is characterized in that:
the heat preservation container is formed by vacuumizing between an outer shell and an inner shell which are made of metal, and a sealed vacuum heat preservation cavity is formed between the outer shell and the inner shell;
the auxiliary piece is fixed at the corner position of the inner side of the shell, the low-temperature sealing layer faces the shell, and therefore the low-temperature sealing layer is fixed between the high-temperature covering layer and the shell;
the housing is provided with the exhaust hole, the auxiliary covers the exhaust hole, and the low-temperature sealing layer seals the exhaust hole.
6. The thermal container according to claim 5, characterized in that:
the auxiliary piece is arranged in the heat preservation cavity, the auxiliary piece is fixed on the edge of the bottom of the shell, and the low-temperature sealing layer is tightly attached to the inner surface of the shell; the auxiliary member covers the exhaust hole, and the low-temperature sealing layer seals the exhaust hole.
7. The thermal container according to claim 6, characterized in that:
the bottom of the shell is provided with an exhaust groove, the exhaust groove protrudes from inside to outside, and an exhaust hole of the shell is formed in the exhaust groove;
the auxiliary piece is fixed in the exhaust groove, and the low-temperature sealing layer seals the exhaust hole.
8. The thermal container according to claim 5, characterized in that:
the auxiliary member set up in the vacuum heat preservation chamber, the top of shell is equipped with the opening, the opening is crooked, the opening is equipped with the exhaust hole, the auxiliary member is fixed in the opening of shell, the auxiliary member covers the exhaust hole, the low temperature sealing layer sets up between high temperature overburden layer and opening, and the low temperature sealing layer seals the exhaust hole.
9. The thermal container according to claim 5, characterized in that:
the side wall of the shell is provided with an exhaust groove, the exhaust groove protrudes from inside to outside, and an exhaust hole of the shell is arranged in the exhaust groove;
the auxiliary member is fixed to the exhaust groove, a high-temperature covering layer of the auxiliary member covers the entire exhaust groove from the inner side of the housing, and the low-temperature sealing layer seals the exhaust hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482309.9A CN108216943B (en) | 2017-12-29 | 2017-12-29 | Preparation method of heat-insulating container with good air tightness and heat-insulating container prepared by same |
| PCT/CN2018/078674 WO2019127908A1 (en) | 2017-12-29 | 2018-03-12 | Method for preparing airtight and insulated container, and insulated container prepared by same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482309.9A CN108216943B (en) | 2017-12-29 | 2017-12-29 | Preparation method of heat-insulating container with good air tightness and heat-insulating container prepared by same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108216943A CN108216943A (en) | 2018-06-29 |
| CN108216943B true CN108216943B (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711482309.9A Active CN108216943B (en) | 2017-12-29 | 2017-12-29 | Preparation method of heat-insulating container with good air tightness and heat-insulating container prepared by same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108216943B (en) |
| WO (1) | WO2019127908A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000051098A (en) * | 1998-08-10 | 2000-02-22 | Zojirushi Corp | Sealing of vacuum structure |
| GB0022972D0 (en) * | 1999-09-21 | 2000-11-01 | Nippon Oxygen Co Ltd | Sealing portion structure of exhaust hole of double-walled heat-insulating container and sealing method thereof |
| JP4626674B2 (en) * | 2008-05-02 | 2011-02-09 | サーモス株式会社 | Vacuum structure sealing method |
| CN107296522A (en) * | 2017-07-01 | 2017-10-27 | 佛山市铠斯钛科技有限公司 | A kind of novel evacuated cool-bag manufacture method and its vacuum heat-insulating container of manufacture |
| CN107319960A (en) * | 2017-07-01 | 2017-11-07 | 佛山市铠斯钛科技有限公司 | The method and its Vacuum insulation bottle of a kind of Vacuum insulation bottle for preparing long lifespan |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3439626B2 (en) * | 1997-04-30 | 2003-08-25 | 象印マホービン株式会社 | Vacuum structure sealing method and its structure |
| JP2001061677A (en) * | 1999-08-25 | 2001-03-13 | Zojirushi Corp | Method for sealing vacuum structure |
| CN107380742A (en) * | 2017-07-31 | 2017-11-24 | 白明军 | A kind of vacuum utensil structure of the outer titanium of interior titanium |
-
2017
- 2017-12-29 CN CN201711482309.9A patent/CN108216943B/en active Active
-
2018
- 2018-03-12 WO PCT/CN2018/078674 patent/WO2019127908A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000051098A (en) * | 1998-08-10 | 2000-02-22 | Zojirushi Corp | Sealing of vacuum structure |
| GB0022972D0 (en) * | 1999-09-21 | 2000-11-01 | Nippon Oxygen Co Ltd | Sealing portion structure of exhaust hole of double-walled heat-insulating container and sealing method thereof |
| JP4626674B2 (en) * | 2008-05-02 | 2011-02-09 | サーモス株式会社 | Vacuum structure sealing method |
| CN107296522A (en) * | 2017-07-01 | 2017-10-27 | 佛山市铠斯钛科技有限公司 | A kind of novel evacuated cool-bag manufacture method and its vacuum heat-insulating container of manufacture |
| CN107319960A (en) * | 2017-07-01 | 2017-11-07 | 佛山市铠斯钛科技有限公司 | The method and its Vacuum insulation bottle of a kind of Vacuum insulation bottle for preparing long lifespan |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019127908A1 (en) | 2019-07-04 |
| CN108216943A (en) | 2018-06-29 |
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