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, which comprises an inner container and an outer container, the upper end of the cup body of the outer container is bent inwards and upwards along the radial direction to form a first connecting part and a second connecting part, and a first limiting step is formed at the lap joint of the first connecting part and the second connecting part. A second limiting step protruding outwards in the radial direction is arranged on the outer side wall of the cup opening portion of the inner container cup body, the cup opening portion of the inner container cup body is further provided with a first vertical section, a lap joint section and a second vertical section, the second connecting portion is clamped between the first vertical section and the second vertical section, and brazing filler metal is arranged on the upper end face of the second connecting portion. The brazing material is arranged around the periphery of the first vertical section by a circle, and the inner container cup body and the outer container cup body are connected in a brazing mode through the brazing material. The vacuum cup has the advantages that the brazing material is hidden in the first vertical section and the second vertical section, so that heavy metal in the brazing material at the welding position can be prevented from moving to the cup opening of the vacuum cup, and the vacuum cup is safer to drink 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] Thermos cups are usually containers made of stainless steel inner and outer liner. There is a vacuum layer between the stainless steel inner and 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 drinks such as juice and carbonated drinks. Long-term use will affect the taste of the drinks and easily cause the drinks to deteriorate. The drinks 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, forming 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. In the vacuum brazing process, brazing material is used to weld the titanium inner liner and the stainless steel outer liner. The finished water cup is finally manufactured. Since the brazing material is exposed at the mouth of the water cup, heavy metals such as silver and copper in the brazing material are easy to migrate into the inner liner, and there are health risks when drinking water with 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 soldering material at the mouth of a water cup in the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a cup body of a titanium liner thermos cup, comprising an inner liner and an outer liner, a vacuum layer is provided between the inner liner and the outer liner, the inner liner is made of titanium material, the outer liner is made of stainless steel material, the inner liner comprises an inner liner cup body and an inner liner bottom cover, the lower end of the inner liner cup body is connected to the upper end of the inner liner bottom cover, the outer liner comprises an outer liner cup body and an outer liner bottom cover, the lower end of the outer liner cup body is connected to the upper end of the outer liner bottom cover,

[0005] The upper end of the outer cup body is bent radially inward and upward to form a first connecting part and a second connecting part. The first connecting part is a conical cylinder with a diameter gradually decreasing from bottom to top, and the second connecting part is cylindrical. The overlapping part of the first connecting part and the second connecting part forms a first limiting step. The outer side wall of the cup mouth of the inner cup body is provided with a second limiting step protruding radially outward. The cup mouth of the inner cup body is also provided with a first vertical section, an overlapping section and a second vertical section. The lower end of the first vertical section is connected to the second limiting step, and the upper end of the first vertical section is connected to the second vertical section through the overlapping section. The second connecting part is clamped between the first vertical section and the second vertical section. The upper end surface of the second connecting part is provided with brazing material, and the brazing material is arranged around the outer circumference of the first vertical section. The inner cup body and the outer cup body are brazed and connected by the brazing material.

[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 outer liner cup body is bent radially inward and upward to form a first connecting portion and a second connecting portion, the second connecting portion is clamped between the first vertical section and the second vertical section of the inner liner cup body, the upper end surface of the second connecting portion is provided with a brazing material, the brazing material is arranged around the outer circumference of the first vertical section, the brazing material connects the inner liner cup body and the outer liner cup body together, because the brazing material is hidden inside the first vertical section and the second vertical section, it can prevent the heavy metal in the brazing material at the welding point from migrating to the cup mouth of the thermos cup, and it is safer to drink water using the thermos cup; the second limiting step is fitted below the first limiting step, which facilitates the fitting and alignment of the inner liner and the outer liner during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] 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.

[0008] Figure 1 This is a schematic diagram of the structure of the cup body of the titanium liner thermos cup according to an embodiment of the utility model;

[0009] Figure 2 for Figure 1 The enlarged structural schematic diagram of the A part of the cup body of the titanium liner thermos cup shown;

[0010] Figure 3 This is a schematic diagram of the structure of the inner liner of the cup body of the titanium liner thermos cup according to an embodiment of the utility model;

[0011] Figure 4 It is a schematic structural diagram of the outer liner of the cup body of the titanium liner thermos cup according to an embodiment of the utility model;

[0012] Figure 5 This is a schematic structural diagram of the outer liner bottom cover of the cup body of the titanium liner thermos cup according to an embodiment of the utility model;

[0013] Figure 6 It is a schematic structural diagram of a titanium-steel composite body prepared in the manufacturing process of the cup body of the titanium liner thermos cup according to an embodiment of the utility model;

[0014] Figure 7 for Figure 6 Schematic diagram of the titanium-steel composite body being loaded with brazing material;

[0015] Figure 8 For Figure 7A schematic diagram of the structure of the titanium-steel composite body after the inner liner cup mouth is curled;

[0016] Fig. 9 It is a structural schematic diagram of the welding of the titanium steel composite body and the outer liner bottom cover in the manufacturing process of the cup body of the titanium liner thermos cup according to the embodiment of the utility model;

[0017] Fig.10 This is a schematic structural diagram of a finished titanium liner thermos cup according to an embodiment of the utility model.

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

[0019] 1. Inner liner; 11. Inner liner cup body; 12. Inner liner bottom cover; 1101. First vertical section; 1103. Lap section; 1102. Second vertical section; 1104. Second limiting step;

[0020] 2. outer liner; 21. outer liner cup body; 22. outer liner bottom cover; 2101. first connecting part; 2102. second connecting part; 2103. first limiting step;

[0021] 3. Vacuum layer;

[0022] 4. Brazing material. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] like Figures 1-2 As shown, the cup body of the titanium liner thermos cup provided by the utility model includes an inner liner 1 and an outer liner 2, with a vacuum layer 3 between the inner liner 1 and the outer liner 2, the inner liner 1 is made of titanium material, and the outer liner 2 is made of stainless steel material, the inner liner 1 includes 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 includes 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.

[0028] The upper end of the outer cup body 21 is bent radially inward and upward to form a first connecting portion 2101 and a second connecting portion 2102. The first connecting portion 2101 is a conical cylinder with a diameter gradually decreasing from bottom to top, and the second connecting portion 2102 is cylindrical. The first connecting portion 2101 and the second connecting portion 2102 are connected at the overlap to form a first limiting step 2103. The outer side wall of the cup mouth of the inner cup body 11 is provided with a second limiting step 1104 protruding radially outward. The cup mouth of the inner cup body 11 is also provided with a first vertical section 1101, a connecting section 1103 and a second vertical section 1102. The first vertical section 1101 is provided with a first vertical section 1103, a second vertical section 1102, and a first vertical section 1104 protruding radially outward. The cross-sections of the first vertical section 1101, the overlapping section 1103 and the second vertical section 1102 are in an inverted "U" shape. The lower end of the first vertical section 1101 is connected to the second limiting step 1104, and the upper end of the first vertical section 1101 is connected to the second vertical section 1102 through the overlapping section 1103. The second connecting portion 2102 is clamped between the first vertical section 1101 and the second vertical section 1102. The upper end surface of the second connecting portion 2102 is provided with a solder 4, and the solder 4 is arranged around the outer circumference of the first vertical section 1101. The inner liner cup body 11 and the outer liner cup body 21 are soldered together by the solder 4.

[0029] Compared with the prior art, the cup body of 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 the outer liner cup body 21 is bent radially inward and upward to form a first connecting portion 2101 and a second connecting portion 2102, the second connecting portion 2102 is sandwiched between the first vertical section 1101 and the second vertical section 1102 of the inner liner cup body 11, and a brazing material 4 is provided on the upper end surface of the second connecting portion 2102, and the brazing material 4 surrounds The first vertical section 1101 is arranged in a circle on the outer circumference, and the solder 4 connects the inner cup body 11 and the outer cup body 21 together. Since the solder 4 is hidden inside the first vertical section 1101 and the second vertical section 1102, it is possible to prevent heavy metals in the solder 4 at the welding point from migrating to the cup mouth of the thermos cup, making it safer to drink water using a thermos cup; the second limiting step 1104 is fitted under the first limiting step 2103, which facilitates the alignment of the inner liner 1 and the outer liner during assembly.

[0030] In one embodiment, the cross section of the overlapping section 1103 is arc-shaped, and the upper end surface of the cup mouth of the inner liner 1 is smooth, which provides a better feel in use.

[0031] 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:

[0032] a. Preparation of titanium liner cup body: Take a titanium tube, cut it into the required size, complete the initial shape through the expansion machine, use a special rib pressing and foot shrinking machine to complete a 360° rib pressing circle on the cup mouth of the liner cup body, and form a second limit step 1104 protruding radially outward. The flattening machine flattens the upper and lower end surfaces of the liner cup body 11 according to the required size to complete the preparation of the titanium liner cup body;

[0033] b. Preparation of titanium liner bottom cover:

[0034] 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;

[0035] 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 ;

[0036] d. Preparation of stainless steel outer liner 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, and complete the initial shape of the outer liner cup body through an expansion machine, so that the upper end of the outer liner cup body forms a first connecting portion 2101 and a second connecting portion 2102, and the first connecting portion 2101 and the second connecting portion 2102 overlap to form a first limiting step 2103. The flattening machine flattens the upper and lower end surfaces of the outer liner cup body according to the required size to complete the preparation of the stainless steel outer liner cup body. The structure of the outer liner cup body is as follows Figure 4 As shown;

[0037] e. Preparation of stainless steel outer bottom cover:

[0038] 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 to form the initial shape of the outer liner bottom cover, cut off the excess part with a cutting machine, weld the getter 5 on the inner bottom of the outer liner bottom cover 22 (the structure of the outer liner bottom cover and the position of the getter are as shown in the figure). Figure 5 As shown), the bottom cover of the outer liner made of stainless steel is prepared;

[0039] f. Welding of the inner and outer cups,

[0040] See also Figure 6 and Figure 7 , take the titanium inner liner prepared in step c and the stainless steel outer liner cup body prepared in step d, insert the inner liner 1 into the outer liner cup body 21 from bottom to top, make the second limiting step 1104 of the inner liner cup body 21 fit under the first limiting step 2103 of the outer liner cup body 21, place an annular silver-based brazing material 4 around the outer circumference of the first vertical section 1101 of the inner liner on the upper end surface of the second connecting portion, put the inner liner and the outer liner cup body into a vacuum furnace for vacuum brazing, melt the brazing material through brazing, and connect the inner liner and the outer liner cup body with the brazing material after cooling and solidification to form a titanium-steel composite;

[0041] g. Take the titanium-steel composite prepared in step f, and use a shoulder pressing and foot shrinking machine to curl the first vertical section 1101 of the inner liner cup body of the titanium-steel composite, so that the cup mouth of the inner liner cup body forms a first vertical section 101, a lap section 1103 and a second vertical section 1102, and the second connecting portion 2102 of the outer liner cup body is sandwiched between the first vertical section 1101 and the second vertical section 1102 of the inner liner, as shown in FIG. Figure 8 As shown;

[0042] h. Figures 9 to 10As shown, the titanium steel composite body that has been curled in step g and the titanium outer shell bottom cover 22 prepared in step e are taken, the titanium steel composite body and the outer shell bottom cover 22 are placed in a vacuum furnace, the vacuum furnace is started, the gas pressure in the vacuum furnace is pumped to 10-4Pa, and then the vacuum furnace temperature is heated to 700℃~800℃, the lower end of the outer shell cup body 21 on the titanium steel composite body is welded to the upper end of the outer shell bottom cover 22, the inner shell and the outer shell are enclosed to form a vacuum layer 3, the getter 5 is activated under the high temperature state of the vacuum furnace, and the residual air molecules in the vacuum layer 3 are adsorbed, and the complete vacuuming process is completed. After cooling, the manufacture of the titanium inner shell insulation cup is completed. Since the outer shell cup body 21 and the outer shell bottom cover 22 are both made of stainless steel, the melting points of the two are the same, and ordinary welding processes are used for welding.

[0043] The cup body of the titanium liner thermos cup provided by the utility model is suitable for use as a small-caliber cup body. "Small-caliber cup body" refers to a cup body whose mouth diameter is smaller than the cup body diameter. In step f, during the process of fitting the outer liner 2 and the inner liner 1, the inner liner is at the bottom and the outer liner is at the top, and the inner liner 1 is inserted into the outer liner 2 from bottom to top. Then, the first vertical section 1101 at the upper end of the inner liner cup body of the titanium-steel composite body is curled using a shoulder pressing and foot shrinking machine.

[0044] 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 invention comprises an inner liner and an outer liner, wherein a vacuum layer is provided 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 comprises an inner liner cup body and an inner liner bottom cover, wherein the lower end of the inner liner cup body is connected to the upper end of the inner liner bottom cover, and the outer liner comprises an outer liner cup body and an outer liner bottom cover, wherein 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 outer cup body is bent radially inward and upward to form a first connecting part and a second connecting part. The first connecting part is a conical cylinder with a diameter gradually decreasing from bottom to top, and the second connecting part is cylindrical. The overlapping part of the first connecting part and the second connecting part forms a first limiting step. The outer side wall of the cup mouth of the inner cup body is provided with a second limiting step protruding radially outward. The cup mouth of the inner cup body is also provided with a first vertical section, an overlapping section and a second vertical section. The lower end of the first vertical section is connected to the second limiting step, and the upper end of the first vertical section is connected to the second vertical section through the overlapping section. The second connecting part is clamped between the first vertical section and the second vertical section. The upper end surface of the second connecting part is provided with brazing material, and the brazing material is arranged around the outer circumference of the first vertical section. The inner cup body and the outer cup body are brazed and connected by the brazing material.

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