Vacuum vessel and processing technology thereof

Abstract

The invention discloses a vacuum vessel and a processing technology thereof. The vacuum vessel comprises an outer shell, an inner shell and a vacuum layer between the outer shell and the inner shell. A suction opening is formed in the bottom of the shell, and an auxiliary part is arranged in the suction opening; the auxiliary part comprises a conical ring, a first conical hole and a second conical hole; the suction port is connected with the end face of the shell through a conical surface; an annular groove is formed in the first taper hole, and the annular groove is filled with a first sealing layer in the contraction direction of the first taper hole; a second sealing layer is filled between the conical ring and the conical surface; the second taper hole is filled with a third sealing layer in the extending direction between the annular groove and the end face of the shell. According to the vacuum cup and the processing technology thereof, the sealing effect of the vacuum cup is better by arranging the multiple sealing layers, better anti-falling performance is achieved when the vacuum cup is impacted or falls, and air leakage of the vacuum layers is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum insulation cups, in particular to a vacuum vessel and a processing technology thereof. Background Art

[0002] The vacuum insulated cup is a vacuum vessel, which is usually composed of an outer shell, an inner shell and a vacuum layer between the inner and outer shells. After the outer shell and the inner shell are welded, the vacuum layer is formed by vacuum suction and then sealed, so that the inner shell of the cup body has excellent thermal insulation effect.

[0003] The vacuum suction port of the vacuum flask is one of the key parts in the production of the vacuum flask. The position and design of the suction port directly affect the vacuum effect and the service life of the flask; in the existing production process, the suction port is usually set at the bottom center of the shell, and the entire vacuum suction and sealing process is carried out in a vacuum furnace. When sealing, a glass ball needs to be placed on the suction port in advance. After the vacuum suction is completed, the temperature in the vacuum furnace is increased to weld the glass ball to the suction port for sealing, so that the vacuum layer has better thermal insulation performance.

[0004] In the above-mentioned vacuum suction and welding process, there are the following disadvantages and shortcomings: 1. When the glass ball is placed at the suction port in advance, the surface of the glass ball and the suction hole are slightly shielded, which will affect the vacuum suction speed, and the suspended particles in the vacuum layer are difficult to be extracted synchronously with the air when the temperature rises, affecting the quality of the vacuum layer; 2. The glass ball pre-suction hole is usually sealed with a single layer, and due to the material of the glass ball, when the thermos cup is used, if it collides or falls, the sealing mouth is easy to detach or break, which will weaken the airtightness of the vacuum layer and affect the internal vacuum degree, thereby reducing the insulation effect of the thermos cup. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a vacuum vessel and a processing technology thereof, thereby improving the strength and sealing of the suction hole sealing and solving the problem of reduced suction efficiency caused by glass balls shielding the suction holes during vacuum suction.

[0006] In order to solve the above technical problems, the present invention solves them through the following technical solutions: a vacuum vessel and a processing technology thereof, comprising an outer shell, an inner shell and a vacuum layer between the outer shell and the inner shell.

[0007] In the above solution, preferably, a suction port is provided at the bottom of the housing, and an auxiliary component is provided in the suction port; The auxiliary component includes a tapered ring, a first tapered hole and a second tapered hole; The suction port is connected to the end surface of the shell through a tapered surface; An annular groove is provided in the first tapered hole, and the annular groove is filled with a first sealing layer in the direction in which the first tapered hole shrinks; A second sealing layer is filled between the conical ring and the conical surface; The second tapered hole is respectively filled with a third sealing layer in the extending direction between the annular groove and the end surface of the shell.

[0008] In the above solution, preferably, the first sealing layer and the second sealing layer are made of the same material and are melt-formed at one time.

[0009] In the above solution, preferably, the third sealing layer has a higher melting point than the first sealing layer or the second sealing layer.

[0010] In the above solution, preferably, the outer side of the conical ring includes an annular conical surface, and a filling groove for filling the second sealing layer is formed between the annular conical surface and the conical surface.

[0011] In the above scheme, preferably, a processing technology for a vacuum vessel is characterized in that: the process is as follows: S1: manufacturing a fusion welding part, the fusion welding part comprising an outer layer made of the same material as the first sealing layer and an inner layer made of the same material as the third sealing layer, the outer layer being provided with a clamping piece, and the inner layer being a sphere; S2: Place the auxiliary component into the suction port; S3: clamping the fusion welding part into the filling groove by means of the clamping piece, and placing the center of gravity of the inner layer above the conical surface of the second conical hole; S4: putting the assembled vacuum vessel into a vacuum furnace, heating the vacuum furnace to 100-200°C, and evacuating the vacuum layer. The air in the vacuum layer is discharged through the first cone hole and the second cone hole, so that the vacuum degree in the vacuum layer meets the standard. S5: Continue to heat the vacuum furnace to 500-600°C to melt the outer layer, fill the filling groove after the outer layer melts, and enter the first tapered hole through the second tapered hole to form a first sealing layer and a second sealing layer; S6: In S5, after the outer layer melts, the inner layer of the sphere rolls down onto the conical surface of the second conical hole; S7: Continue to heat the vacuum furnace to 800-1000°C to melt the inner layer and flow around to form a third sealing layer, thus completing the vacuum sealing.

[0012] In the above solution, preferably, in step S1, the outer layer includes a first spherical shell and a snap-on piece (503), and the first spherical shell and the snap-on piece are integrally formed.

[0013] In the above solution, preferably, in step S1, the outer edge of the engaging piece is provided with a sharp corner matching with the filling groove.

[0014] In the above scheme, preferably, in step S1, the inner layer includes a second spherical shell, the second spherical shell is made of glass, and the second spherical shell is filled with silver-based alloy powder and glass particles, the proportion of the silver-based alloy powder is 20%-40%, and the proportion of the glass particles is 60%-80%.

[0015] In the above scheme, preferably, in step S1, the outer layer material is silver-tin alloy.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a vacuum insulation cup and its processing technology, which can improve the sealing effect of the vacuum insulation cup by setting a multi-layer sealing layer, and has better anti-fall performance when encountering impact or falling, thereby preventing the vacuum layer from leaking; at the same time, a separate fusion welding part is placed on one side during suction, so that the vacuum suction efficiency is better, and after the suction is completed, it is fusion-welded with the outer shell to form a multi-layer sealing layer, thereby improving the suction efficiency and welding efficiency of the vacuum insulation cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0019] Figure 3 This is a schematic diagram of the structure of the vacuum vessel of the present invention when it is evacuated.

[0020] Figure 4 For the present invention Figure 3 Enlarged structural diagram at B in the middle.

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the auxiliary component of the present invention.

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the fusion welding part of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 6 A vacuum vessel comprises an outer shell 1, an inner shell 2 and a vacuum layer 3 between the outer shell 1 and the inner shell 2. Figure 1 As shown, this is the state of the vacuum flask when it is inverted, and the bottom of the flask is at the top position shown in the figure.

[0024] The bottom of the housing 1 is provided with a suction port 101 which is formed by stamping, and a conical surface 104 is formed between the suction port 101 and the outer end surface of the housing 1, that is, the suction port 101 is located at the center of the inner concave surface.

[0025] The suction port 101 is provided with an auxiliary member 4, which includes a conical ring 401, a first conical hole 402 and a second conical hole 403. Figure 1-4 Taking the direction shown as an example, the lower end of the auxiliary part 4 is placed in the suction port 101, and the conical ring 401 is placed above the suction port 101, and the conical ring 401 is in a state of diffusion from the center to the outside; the first conical hole 402 is connected to the second conical hole 403, and runs through the center of the entire auxiliary part 4. The first conical hole 402 is located below the auxiliary part 4, and the open mouth at its lower end is connected to the vacuum layer 3.

[0026] The second conical hole 403 is arranged above the first conical hole 402 , and its open mouth is connected to the outside. When the thermos cup is placed in a vacuum furnace for vacuum suction, the air in the vacuum layer 3 can be sucked through the second conical hole 403 and the first conical hole 402 .

[0027] The outer side of the conical ring 401 includes an annular conical surface 408, and a filling groove 409 is formed between the annular conical surface 408 and the conical surface 104. An annular groove 404 is provided in the first conical hole 402, and the annular groove 404 is filled with a first sealing layer 405 in the contraction direction of the first conical hole 402. A second sealing layer 406 is filled between the conical ring 401 and the conical surface 104, that is, the filling groove 409 is filled with the second sealing layer 406. After the vacuum suction is completed, the first sealing layer 405 and the second sealing layer 406 are filled, so that the first sealing process between the auxiliary component 4 and the outer shell 1 is completed.

[0028] The second tapered hole 403 is filled with a third sealing layer 407 in the extending direction between the annular groove 404 and the end face of the shell 1. The third sealing layer 407 is placed above the first sealing layer 405 and the second sealing layer 406 to form a second sealing process, thereby achieving double-layer sealing of the suction port of the vacuum flask, improving the sealing effect and the shock and drop resistance.

[0029] The first sealing layer 405 and the second sealing layer 406 are made of the same material and are melt-formed at one time, that is, during production, the first sealing layer 405 and the second sealing layer 406 are simultaneously welded and sealed, and are made of the same material, and a closed end formed by its own weight is formed at the lower end of the first sealing layer 405, so that the first tapered hole 402 is completely sealed; the third sealing layer 407 has a higher melting point than the first sealing layer 405 or the second sealing layer 406, so that the first sealing layer 405 and the second sealing layer 406 are further heated after the melting and sealing is completed, and the sealing material of the third sealing layer 407 is used to further seal the suction port 101, that is, the entire auxiliary component 4 is covered and sealed.

[0030] A processing technology for a vacuum vessel, the process is as follows: S1: The outer shell 1 and the inner shell 2 are welded to form a whole thermos cup, and the suction port 101 is in the Figure 3 In the state shown, it is placed on the fixture; at the same time, a fusion welding part 5 is made, and the fusion welding part 5 includes an outer layer 501 of the same material as the first sealing layer 405 and an inner layer 502 of the same material as the third sealing layer 407, and the outer layer 501 is provided with a clamping piece 503, and the inner layer 502 is a sphere; S2: Put the auxiliary component 4 into the suction port 101, and the auxiliary component 4 and the suction port 101 may be fixed by riveting; S3: The welding piece 5 is clamped into the filling groove 409 by the clamping piece 503, so that the welding piece 5 is placed on one side of the first tapered hole 402, and the center of gravity of the inner layer 502 is placed above the conical surface of the second tapered hole 403, that is, when the inner layer 502 is in free fall, it can roll onto the second tapered hole 403 and contact the conical surface of the second tapered hole 403; S4: Put the assembled vacuum vessel into the vacuum furnace through the placement rack fixture, heat the vacuum furnace to 100-200° C., and evacuate the vacuum layer 3. The air in the vacuum layer 3 is discharged through the first tapered hole 402 and the second tapered hole 403, so that the vacuum degree in the vacuum layer 3 meets the standard; S5: Continue to heat the vacuum furnace to 500-600°C to melt the outer layer 501, and at the same time, drive the fixture to vibrate slightly by the vibrator, so that the outer layer 501 melts and evenly fills the filling groove 409, and enters the first tapered hole 402 through the second tapered hole 403, and performs free fall blocking on the lower port of the first tapered hole 402, thereby forming the first sealing layer 405 and the second sealing layer 406; S6: In S5, after the outer layer 501 melts, the inner layer 502 of the sphere rolls down onto the conical surface of the second conical hole 403; S7: Continue to heat the vacuum furnace to 800-1000° C., so that the inner layer 502 melts and flows around to form a third sealing layer 407, thereby completing the vacuum sealing of the entire vacuum layer 3 of the thermos cup; S8: The vacuum furnace is slowly cooled to reduce internal stress and avoid cracking caused by thermal stress between the glass and stainless steel.

[0031] In this embodiment, the auxiliary component 4 can be made of the same stainless steel material as the outer shell 1 and the inner shell 2, or a copper alloy.

[0032] In step S1, the outer layer 501 includes a first spherical shell 504 and a clamping piece 503. The first spherical shell 504 and the clamping piece 503 are integrally formed, and the material thereof can be silver-tin alloy, and the melting point of the material is set at 500-600°C; In step S1, the snap-in piece 503 is circular, and the outer edge is provided with a sharp corner 505 that matches the filling groove 409, so that the snap-in piece 503 is inserted into the filling groove 409 through the sharp corner 505 to be fixed in the initial state. When the first spherical shell 504 of the outer layer 501 and the snap-in piece 503 are melted, the material of the snap-in piece 503 flows into the filling groove 409 to fill it, and the material of the first spherical shell 504 enters the first conical hole 402 through the second conical hole 403 to fill the suction part of the auxiliary part 4. After the outer layer 501 is melted, the second spherical shell 506 is exposed and rolls onto the second conical hole 403.

[0033] In step S1, the inner layer 502 includes a second spherical shell 506, and the second spherical shell 506 is made of glass, and the melting point of the glass material is preferably selected within the range of 800-1000°C; the second spherical shell 506 is filled with silver-based alloy powder and glass particles, the proportion of the silver-based alloy powder is 20%-40%, the proportion of the glass particles is 60%-80%, and the melting point is 800-1000°C; the silver-based alloy can be a silver-copper alloy, and the melting point ranges from 700-960°C. When the temperature in the vacuum furnace rises to 800°C or above, the second spherical shell 506 melts as a whole, and the silver-based alloy powder and glass particles therein are mixed and melted to fill the space between the upper end face of the entire auxiliary component 4 and the outer end face of the outer shell 1.

[0034] In this embodiment, the particle sizes of the silver-based alloy powder and the glass particles in the second spherical shell 506 can be the same or similar, and can be adaptively adjusted according to the area of ​​the tapered surface 104 and the sealing space required by the auxiliary component 4.

[0035] In addition, the selection of specific glass materials or alloy materials is a prior art means for those skilled in the art and will not be elaborated herein.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum vessel, comprising an outer shell (1), an inner shell (2), and a vacuum layer (3) between the outer shell (1) and the inner shell (2), characterized in that: The bottom of the housing (1) is provided with a suction port (101), and an auxiliary component (4) is provided inside the suction port (101); The auxiliary component (4) comprises a tapered ring (401), a first tapered hole (402) and a second tapered hole (403); The suction port (101) is connected to the end surface of the housing (1) via a tapered surface (104); An annular groove (404) is provided in the first tapered hole (402), and the annular groove (404) is filled with a first sealing layer (405) in a direction in which the annular groove (404) contracts towards the first tapered hole (402); A second sealing layer (406) is filled between the conical ring (401) and the conical surface (104); The second tapered hole (403) is filled with a third sealing layer (407) in the direction extending between the annular groove (404) and the end surface of the housing (1).

2. A vacuum vessel according to claim 1, characterized in that: The first sealing layer (405) and the second sealing layer (406) are made of the same material and are melt-formed at one time.

3. A vacuum vessel according to claim 1 or 2, characterized in that: The third sealing layer (407) has a higher melting point than the first sealing layer (405) or the second sealing layer (406).

4. A vacuum vessel according to claim 3, characterized in that: The outer side of the conical ring (401) comprises an annular conical surface (408), and a filling groove (409) for filling the second sealing layer (406) is formed between the annular conical surface (408) and the conical surface (104).

5. The processing technology of a vacuum vessel according to claim 4, characterized in that: The process is as follows: S1: manufacturing a fusion welding part (5), the fusion welding part (5) comprising an outer layer (501) made of the same material as the first sealing layer (405) and an inner layer (502) made of the same material as the third sealing layer (407), the outer layer (501) being provided with a clamping piece (503), and the inner layer (502) being a sphere; S2: placing the auxiliary component (4) into the suction port (101); S3: clamping the fusion welding part (5) into the filling groove (409) by means of the clamping piece (503), and placing the center of gravity of the inner layer (502) above the conical surface of the second conical hole (403); S4: placing the assembled vacuum vessel as a whole into a vacuum furnace, heating the vacuum furnace to 100-200° C., and performing vacuuming, wherein the air in the vacuum layer (3) is discharged through the first conical hole (402) and the second conical hole (403), so that the vacuum degree in the vacuum layer (3) meets the standard; S5: the vacuum furnace is further heated to 500-600°C to melt the outer layer (501), and after the outer layer (501) is melted, the filling groove (409) is filled and enters the first tapered hole (402) through the second tapered hole (403), thereby forming a first sealing layer (405) and a second sealing layer (406); S6: In S5, after the outer layer (501) melts, the inner layer (502) of the sphere rolls down onto the conical surface of the second conical hole (403); S7: Continue to heat the vacuum furnace to 800-1000°C, so that the inner layer (502) melts and flows around to form a third sealing layer (407), thereby completing vacuum sealing.

6. A vacuum vessel processing process according to claim 5, characterized in that: In step S1, the outer layer (501) comprises a first spherical shell (504) and a snap-on piece (503), and the first spherical shell (504) and the snap-on piece (503) are integrally formed.

7. The processing technology of a vacuum vessel according to claim 5, characterized in that: In step S1, the outer edge of the engaging piece (503) is provided with a sharp corner (505) that matches the filling groove (409).

8. The processing technology of a vacuum container according to claim 5, characterized in that: In step S1, the inner layer (502) includes a second spherical shell (506), the second spherical shell (506) is made of glass, and the second spherical shell (506) is filled with silver-based alloy powder and glass particles, the proportion of the silver-based alloy powder is 20%-40%, and the proportion of the glass particles is 60%-80%.

9. The processing technology of a vacuum container according to claim 5, characterized in that: In step S1, the outer layer (501) is made of silver-tin alloy.

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