Two-end-through vacuum heat-insulated container outer tube sealing structure and sealing method

The present invention relates to the technical field of metal vacuum cup containers, and in particular, to a two-end-through vacuum heat-insulated container outer tube sealing structure and sealing method.

Two-end-through vacuum cups currently on the market are mainly in the following four types: the first type is to adopt a double-layer structure without vacuum pumping, and this type of structure cannot provide heat preservation, wastes energy, and may cause scalds; the second type is to form a vacuum cavity inside a bottle body, and this type of structure may provide heat preservation, but the sealing material for a vacuum cup is glass, which generally contains lead that is a heavy metal harmful to a human body; the third type is to form a vacuum hole on an outer tube, and then cover same with a sticker or the like, and for this type of structure, during daily usages, the sticker may fall off with the usage time, frequency and cleaning so that the glass sealing material is exposed to be in contact with the human body and cause appearance defects; and the fourth type is to form the vacuum hole on the outer tube, and then cover same through stainless steel butt-joint welding, and this type of structure cannot fully seal the glass sealing material, water would also flow into the cup during washing, and the appearance would also be affected.

An objective of the present invention is to provide a two-end-through vacuum heat-insulated container outer tube sealing structure and sealing method, which solves the problems that the existing sealing structure is easy to fall off, unsightly, easy to break, and unsanitary.

The technical solution of the present invention is: a two-end-through vacuum heat-insulated container outer tube sealing structure, including a vacuum heat-insulated container outer tube, where a shoulder part of the vacuum heat-insulated container outer tube is provided with a plane; a vacuum cavity is formed in the plane; a vacuum hole for vacuum pumping is formed in the vacuum cavity; and the vacuum cavity is filled with a sealing material; where a side surface of the plane of the shoulder part is provided with a circular step from top to bottom; a shielding cover is subjected to primary welding on the circular step; a weld bead of the welding is removed by polishing; the shielding cover and the circular step are in gap-free fit; the other end of the shielding cover is subjected to secondary welding with a mouth part of a bottle body; and the weld bead of the welding is removed by sanding the mouth.

The shielding cover and the circular step are in gap-free fit.

The shielding cover and the heat-insulated container outer tube are made of stainless steel.

The welding for the shielding cover and the circular step is laser welding.

The weld beads of the shielding cover and the circular step are removed by polishing.

The welding for the other end of the shielding cover and the mouth part of the bottle body is laser welding or argon arc welding.

The weld beads of the other end of the shielding cover and the mouth part of the bottle body are removed by sanding the mouth.

A two-end-through vacuum heat-insulated container outer tube sealing method, including the sealing structure according to and of the above-recited embodiments and including the following steps:

step I, placing a shielding cover on a step at a side surface of a shoulder part of a vacuum heat-insulated container, and laser welding and fixing;

step II, laser welding or mouth welding the other end of the shielding cover to a mouth part of the vacuum heat-insulated container;

step III, removing a weld bead generated by laser welding in step I by polishing; and

step IV, removing a weld bead generated by laser welding or argon arc welding in step II by sanding the mouth.

According to the present invention, glass consumables do not affect appearance while ensuring vacuum heat preservation, and under the condition that the container is not damaged, the glass consumables are not shown, and are not in contact with a medium in the heat-insulated container; moreover, harm of lead contained in the glass consumables to a human body is prevented. After primary welding, a weld bead caused by welding may be left, and after being polished, the weld bead is necessarily removed and cannot be viewed on the outer tube, the weld lead and an outer housing are integrated, and the appearance is attractive.

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of a vacuum heat-insulated container.

In the drawings, 1 : container mouth part; 2 : secondary welding; 3 : shielding cover; 4 : outer tube; 5 : vacuum hole; 6 : vacuum cavity; 7 : glass consumables; 8 : circular step; and 9 : primary welding; 10 : shoulder part; 11 : plane; 12 side surface.

A two-end-through vacuum heat-insulated container outer tube sealing structure includes a vacuum heat-insulated container outer tube 4 , where a shoulder part 10 of the vacuum heat-insulated container outer tube 4 is provided with a plane 11 ; a vacuum cavity 6 is formed in the plane 11 ; a vacuum hole 5 for vacuum pumping is formed in the vacuum cavity 6 ; the vacuum cavity 6 is filled with a glass sealing material 7 ; during vacuum processing, the glass sealing material 7 is heated so that the glass sealing material 7 is melted and seals the vacuum hole 5 ; where a side surface 12 of the plane 11 of the shoulder part 10 is provided with a circular step 8 from top to bottom; a shielding cover 3 is subjected to primary welding 9 on the circular step 8 ; the shielding cover 3 is fitted at the circular step 8 of the outer tube 4 ; the shielding cover 3 is fixed on the circular step 8 of the outer tube 4 through primary laser welding; a weld bead of the primary welding 9 is removed by polishing; the shielding cover 3 and the circular step 8 are in gap-free fit; the other end of the shielding cover 3 is subjected to secondary welding with a mouth part of a bottle body; and the weld bead of the welding is removed by sanding the mouth, so that the glass sealing material 7 for sealing cannot be found in the appearance of the vacuum heat-insulated container.

The shielding cover 3 and the circular step 8 are in gap-free fit.

The shielding cover 3 and the heat-insulated container outer tube 4 are made of stainless steel.

The welding for the shielding cover 3 and the circular step 8 is laser welding.

The weld beads of the shielding cover 3 and the circular step 8 are removed by polishing.

The welding for the other end of the shielding cover 3 and the container mouth part 1 is laser welding or argon arc welding.

The weld beads of the other end of the shielding cover 3 and the container mouth part 1 are removed by sanding the mouth.

A two-end-through vacuum heat-insulated container outer tube sealing method includes the sealing structure according to any one of above-recited embodiments and includes the following steps:

step I, placing a shielding cover 3 on a circular step 8 at a side surface 12 of a shoulder part 10 of a vacuum heat-insulated container, and laser welding and fixing;

step II, laser welding or mouth welding the other end of the shielding cover 3 to a mouth part 1 of the vacuum heat-insulated container;

step III, removing a weld bead generated by laser welding in step I by polishing; and

step IV, removing a weld bead generated by laser welding or argon arc welding in step II by sanding the mouth.

The embodiments above are merely used for explaining the creation of the present invention rather than limiting the technical solutions described in the creation of the present invention, and therefore, although the description already explains the creation of the present invention in detail with reference to the embodiments above, a person having ordinary skill in the art should understand that the creation of the present invention can still be modified and equivalently replaced; moreover, the technical solutions and improvements thereof that do not depart from the spirits and scopes of the creation of the present invention should all fall within the claims of the creation of the present invention.