Cup body of titanium inner container vacuum cup

Abstract

The utility model belongs to the technical field of water cups, and particularly relates to a cup body of a titanium inner container vacuum cup, the cup body comprises a titanium inner container and a stainless steel outer container, a vacuum layer is arranged between the inner container and the outer container, the upper end of a cup body of the inner container is bent outwards to form a first horizontal section and a first vertical section, and the upper end of a cup body of the outer container is provided with a second vertical section. The second vertical section is located on the inner circumferential side of the first vertical section, the second vertical section is provided with an inwards-concave part which is inwards concave in the radial direction, and the inwards-concave part and the first vertical section define a containing cavity used for containing brazing filler metal. The vacuum cup has the advantages that the inner container cup body and the outer container cup body are connected together through the brazing filler metal in the containing cavity, the brazing filler metal is hidden in the containing cavity and is far away from the opening portion of the cup body of the vacuum cup, heavy metal in the brazing filler metal at the welding position can be prevented from moving towards the opening portion of the vacuum cup, and water drinking is safer when the vacuum cup is used for drinking water.

Description

Technical Field

[0001] The utility model belongs to the technical field of water cups, and particularly relates to a cup body of a titanium liner thermos cup. Background Art

[0002] A thermos cup is usually a container made of a stainless steel inner liner and a stainless steel outer liner. A vacuum layer is provided between the stainless steel inner liner and the stainless steel outer liner. The vacuum layer can delay heat dissipation to achieve the effect of heat preservation. Since the inner liner of the thermos cup is made of stainless steel, heavy metals will precipitate when it is used to hold beverages such as juice and carbonated drinks. Long-term use will affect the taste of the beverage and easily cause the beverage to deteriorate. The beverage will also gradually corrode the stainless steel inner liner, causing it to break, affecting the service life of the thermos cup. So some people use titanium as the inner liner and stainless steel as the outer liner to form a vacuum insulation layer between the titanium inner liner and the stainless steel outer liner. Due to the different melting points of titanium and stainless steel, vacuum brazing is usually used to weld titanium and stainless steel. The utility model patent (application number: 202020872428.6, authorization announcement number: CN 212221148 U) discloses an insulation container, which includes a titanium inner liner and a stainless steel outer shell. A vacuum insulation cavity is formed between the inner liner and the outer shell, and a welding cavity is formed at the upper end opening of the inner liner and the outer shell, such as Figure 8 As shown, the strong solder 4 is used to connect the inner liner and the outer shell by vacuum brazing at the welding cavity. However, the brazing material contains heavy metals such as silver and copper. The titanium inner liner and the stainless steel outer liner are welded at the mouth of the container. The heavy metals in the brazing material are easy to migrate into the inner liner, which poses a health hazard when drinking water from a thermos cup. Utility Model Content

[0003] The utility model aims to provide a cup body of a thermos cup with a titanium liner, so as to solve the problem of heavy metal migration of solder at the welding point between the titanium liner and the stainless steel outer liner in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A cup body of a titanium liner thermos cup, the cup body comprising an inner liner and an outer liner, a vacuum layer being provided between the inner liner and the outer liner, the inner liner being made of titanium material, the outer liner being made of stainless steel material, the inner liner comprising an inner liner cup body and an inner liner bottom cover, the lower end of the inner liner cup body being connected to the upper end of the inner liner bottom cover, the outer liner comprising an outer liner cup body and an outer liner bottom cover, the lower end of the outer liner cup body being connected to the upper end of the outer liner bottom cover, the upper end of the inner liner cup body being bent outward to form a first horizontal section and a first vertical section, the upper end of the outer liner cup body being provided with a second vertical section, the second vertical section being provided with an inner concave portion being concave inwardly along a radial direction, the inner concave portion being enclosed with the first vertical section to form a receiving cavity for accommodating solder, the solder in the receiving cavity connecting the first vertical section with the second vertical section, so that the inner liner cup body and the outer liner cup body are connected by soldering.

[0006] The cup body of the titanium liner thermos cup provided by the utility model has the beneficial effect that, compared with the prior art, the inner liner is made of titanium material, the outer liner is made of stainless steel material, the upper end of the inner liner cup body is bent outward to form a first horizontal section and a first vertical section, the upper end of the outer liner cup body has a second vertical section, the second vertical section is located on the inner circumference of the first vertical section, the second vertical section is provided with an inner concave portion radially concave inward, the inner concave portion and the first vertical section are enclosed to form a receiving cavity for accommodating solder, the solder in the receiving cavity connects the inner liner cup body and the outer liner cup body together, because the solder is hidden in the receiving cavity, the solder is away from the mouth of the cup body of the thermos cup, it can prevent heavy metals in the solder at the welding point from migrating to the mouth of the thermos cup, and it is safer to drink water using a thermos cup.

[0007] In one embodiment, the cup mouth of the inner liner cup body is provided with an internal thread.

[0008] In one embodiment, the upper end of the outer cup body is bent inward to form a horizontal fold and the second vertical segment, the upper end surface of the horizontal fold and the outer peripheral surface of the second vertical segment constitute a slot for accommodating the first vertical segment, and the outer surface of the first vertical segment is flush with the outer surface of the outer cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0010] Figure 1 It is a longitudinal cross-sectional view of the cup body of a titanium liner thermos cup according to an embodiment of the utility model;

[0011] Figure 2 for Figure 1An enlarged schematic diagram of the A portion of the cup body of the titanium liner thermos cup shown;

[0012] Figure 3 for Figure 1 The schematic diagram of the structure of the inner liner of the cup body of the titanium liner thermos cup shown;

[0013] Figure 4 for Figure 1 The schematic diagram of the structure of the outer liner of the cup body of the titanium liner thermos cup shown;

[0014] Figure 5 A longitudinal cross-sectional view of a cup body of a titanium liner thermos cup according to another embodiment of the present invention;

[0015] Figure 6 for Figure 5 The schematic diagram of the structure of the inner liner of the cup body of the titanium liner thermos cup shown;

[0016] Figure 7 for Figure 5 The schematic diagram of the structure of the outer liner of the cup body of the titanium liner thermos cup shown;

[0017] Figure 8 The present invention is a schematic structural diagram of a vacuum brazing portion of a heat-insulating container in the prior art.

[0018] Among them, the reference numerals in the figure are:

[0019] 1. liner; 101. first vertical section; 103. first horizontal section; 11. liner cup body; 111. internal thread; 12. liner bottom cover;

[0020] 2. outer liner; 202. second vertical section; 204. horizontal fold; 200. slot; 21. outer liner cup body; 22. outer liner bottom cover;

[0021] 3. Vacuum layer;

[0022] 4. solder; 40. accommodating cavity;

[0023] 5. Getter. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] like Figures 1 to 4 As shown, the cup body of the titanium liner thermos cup provided by the utility model comprises an inner liner 1 and an outer liner 2, a vacuum layer 3 is provided between the inner liner 1 and the outer liner 2, the inner liner 1 is made of titanium material, the outer liner 2 is made of stainless steel material, the inner liner 1 comprises an inner liner cup body 11 and an inner liner bottom cover 12, the lower end of the inner liner cup body 11 is connected to the upper end of the inner liner bottom cover 12, the outer liner 2 comprises an outer liner cup body 21 and an outer liner bottom cover 22, the lower end of the outer liner cup body 21 is connected to the upper end of the outer liner bottom cover 22, the upper end of the inner liner cup body 11 is bent outward to form a first horizontal section 103 and a first vertical section 104. The first vertical section 101 has a first vertical section 202 at its upper end, and the second vertical section 202 is located on the inner circumference of the first vertical section 101. The second vertical section 202 is provided with an inner recess 2020 which is concave inwardly along the radial direction. The inner recess 2020 and the first vertical section 101 are combined to form a receiving cavity 40 for receiving the solder 4. Specifically, the solder 4 in the receiving cavity 40 connects the first vertical section 101 on the inner liner cup body 11 with the second vertical section 202 on the outer liner cup body 21, so that the inner liner cup body 11 is connected to the outer liner cup body 21 by soldering.

[0029] Compared with the prior art, the titanium liner thermos cup provided by the utility model has an inner liner 1 made of titanium material, an outer liner 2 made of stainless steel material, an upper end of an inner liner cup body 11 is bent outward to form a first horizontal section 103 and a first vertical section 101, an upper end of an outer liner cup body 21 has a second vertical section 202, the second vertical section 202 is located on the inner circumference of the first vertical section 101, the second vertical section 202 is provided with an inner recess 2020 which is concave inward in the radial direction, the inner recess 2020 and the first vertical section 101 are enclosed to form a receiving cavity 40 for accommodating a solder 4, the solder 4 in the receiving cavity 40 connects the inner liner cup body 11 and the outer liner cup body 21 together, because the solder 4 is hidden in the receiving cavity 10, the solder 4 is away from the mouth of the cup body of the thermos cup, heavy metals in the solder at the welding point can be prevented from migrating to the mouth of the thermos cup, and it is safer to drink water using a thermos cup.

[0030] In one embodiment, the cross section of the first horizontal section 103 is arc-shaped, and the upper end surface of the inner container 1 is smooth, which provides a better feel in use.

[0031] In one embodiment, see Figure 3 The cup mouth of the inner cup body 11 is provided with an internal thread 111 to facilitate threaded connection between the cup body and the cup cover.

[0032] See also Figures 5 to 7 The main structure and principle of the cup body of the titanium liner thermos cup provided in another embodiment of the present application are the same as those of the aforementioned embodiment, except that the upper end of the outer liner cup body is bent inward to form a horizontal fold 204 and the second vertical segment 202, and the upper end surface of the horizontal fold 204 and the outer peripheral surface of the second vertical segment 202 constitute a slot 200 for accommodating the first vertical segment 101, and the outer surface of the first vertical segment 101 is flush with the outer surface of the outer liner 2. Figure 1 The structure shown in the figure directly protrudes the first vertical section 101 of the inner liner from the outer surface of the outer liner. Figure 5 In the structure shown, the first vertical section 101 of the inner container is flush with the outer surface of the inner container, which looks more beautiful.

[0033] In another embodiment of the present application, the present application also provides a manufacturing process for a cup body of a titanium liner thermos cup. The structure of the cup body of the titanium liner thermos cup is the same as that described in the above embodiment. The manufacturing process includes the following steps:

[0034] a. Preparation of titanium liner body: Take the titanium tube, cut it into the required size, complete the initial shape through the expansion machine, obtain the first horizontal section 103 and the first vertical section 101 through the shoulder and foot press machine, and flatten the lower end surface of the liner body according to the required size by the flattening machine to complete the preparation of the titanium liner body;

[0035] b. Preparation of titanium liner bottom cover:

[0036] The titanium material inner liner bottom cover can be prepared by existing technology. This embodiment introduces one of the processes: the titanium material inner liner bottom cover is formed by material taking, cutting, forming, and finishing;

[0037] c. Take the titanium liner cup body prepared in step a and the titanium liner bottom cover prepared in step b, and weld the lower end of the liner cup body 11 to the upper end of the liner bottom cover 12 to form a titanium liner. For the structure of the titanium liner, please refer to Figure 3 ;

[0038] d. Preparation of stainless steel outer cup body: Take food grade 304 or 316 stainless steel sheet, cut it into the required size, form it into a cylindrical shape through forming and welding processes, complete the initial shape of the outer cup body through the expansion machine, use the cup dividing machine to divide it into two parts, use a special rib pressing machine to complete a 360° rib pressing circle inward, so that the second vertical section 202 of the inner cup body 21 forms a radially inward concave portion 2020, and the flattening machine flattens the upper and lower end surfaces of the outer cup body according to the required size to complete the preparation of the stainless steel outer cup body;

[0039] e. Preparation of stainless steel outer bottom cover:

[0040] The preparation process of the outer liner bottom cover of stainless steel material can adopt the existing technology. Specifically, take food grade 304 or 316 stainless steel plate, punch out the required round sheet, stretch and form the initial shape of the outer liner bottom cover, cut off the excess part with a cutting machine, and weld the getter 5 on the inner bottom of the outer liner bottom cover 22 (the position of the getter is as shown in FIG. Figure 4 As shown), the bottom cover of the outer liner made of stainless steel is prepared;

[0041] f. Take the stainless steel outer liner cup body prepared in step d and the stainless steel outer liner bottom cover prepared in step e, weld the lower end of the outer liner cup body 21 to the upper end of the outer liner bottom cover 22 to form a stainless steel outer liner. For the structure of the stainless steel outer liner, please refer to Figure 4 , filling the inner concave portion 2020 of the outer liner of the stainless steel material with silver-based brazing material;

[0042] g. Take the titanium inner liner 1 prepared in step c and the stainless steel outer liner 2 prepared in step f, put the titanium inner liner and the stainless steel outer liner into a vacuum furnace, start the vacuum furnace, pump the gas pressure in the vacuum furnace to 10-4Pa, insert the inner liner 1 into the outer liner 2 from top to bottom, so that the first vertical section 101 of the inner liner cup body 11 is attached to the second vertical section 202 of the outer liner cup body 21 (the first vertical section 101 is attached to the outer peripheral side of the second vertical section 202), heat the vacuum furnace, melt the brazing material 4 and fill the accommodating cavity 40, the inner liner cup body 11, the inner liner bottom cover 12, the outer liner cup body 21 and the outer liner bottom cover 22 are surrounded to form a vacuum layer 3, the getter 5 is activated under the high temperature state of the vacuum furnace, absorbs the residual air molecules in the vacuum layer 3, and completes the thorough vacuuming process. After cooling, the solidified brazing material 4 connects the inner liner 1 and the outer liner 2 to complete the manufacture of the cup body of the vacuum insulation cup.

[0043] The cup body of the titanium liner thermos cup provided by the utility model is suitable for use as a large-caliber cup body. "Large-caliber cup body" refers to a cup body whose cup mouth diameter is larger than the cup body diameter. The utility model first uses a shoulder pressing and foot shrinking machine to curl the upper end of the inner liner cup body to obtain a first horizontal section and a first vertical section. Then, in the process of fitting the outer liner 2 with the inner liner 1 in step g, the inner liner is on top and the outer liner is on the bottom, and the inner liner 1 is inserted into the outer liner 2 from top to bottom.

[0044] In one embodiment, after the preliminary shape is completed by the expansion machine in step a, and before the shoulder pressing and foot shrinking machine is used, a thread rolling process is performed on the upper part of the preliminary shaped inner cup body 11 using a threading machine to form an internal thread 111 for threaded connection with the cup cover.

[0045] In one embodiment, after using a cup dividing machine to divide into two parts in step d, and before using a special rib pressing and foot shrinking machine, it also includes using a shoulder pressing and foot shrinking machine to press out the horizontal fold 204 and the first vertical section 101, and the upper end surface of the horizontal fold 204 and the outer peripheral surface of the second vertical section 202 constitute a slot 200 for accommodating the first vertical section 101.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cup body of a titanium liner thermos cup, characterized in that: The cup body includes an inner liner and an outer liner, with a vacuum layer between the inner liner and the outer liner. The inner liner is made of titanium material, and the outer liner is made of stainless steel material. The inner liner includes an inner liner cup body and an inner liner bottom cover, and the lower end of the inner liner cup body is connected to the upper end of the inner liner bottom cover. The outer liner includes an outer liner cup body and an outer liner bottom cover, and the lower end of the outer liner cup body is connected to the upper end of the outer liner bottom cover. The upper end of the inner liner cup body is bent outward to form a first horizontal section and a first vertical section. The upper end of the outer liner cup body has a second vertical section, and the second vertical section is located on the inner circumferential side of the first vertical section. The second vertical section is provided with an inner concave portion that is concave inward along the radial direction. The inner concave portion and the first vertical section enclose a receiving cavity for accommodating solder. The solder in the receiving cavity connects the first vertical section and the second vertical section together, so that the inner liner cup body and the outer liner cup body are brazed together.

2. The cup body of the titanium liner thermos cup according to claim 1, characterized in that: The cup mouth of the inner liner cup body is provided with an internal thread.

3. The cup body of the titanium liner thermos cup according to claim 1, characterized in that: The upper end of the outer liner cup body is bent inward to form a horizontal fold and the second vertical segment. The upper end surface of the horizontal fold and the outer peripheral surface of the second vertical segment constitute a slot for accommodating the first vertical segment. The outer surface of the first vertical segment is flush with the outer surface of the outer liner.

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