Vacuum brazing furnace for brazing vacuum cup

Abstract

The utility model relates to the technical field of vacuum cup welding, in particular to a vacuum brazing furnace for vacuum cup brazing. Comprising a first vacuum brazing chamber, a second vacuum brazing chamber, a first communicating pipe, a second communicating pipe, a main pipe, a first valve, a second valve, a third valve, a fourth valve, a roots vacuum pump, a slide valve vacuum pump, a diffusion pump, a rotary vane vacuum pump, a main valve, a first inflating device and a second inflating device. One of the two vacuum brazing chambers can be vacuumized, heated and brazed, the diffusion pump and the rotary vane vacuum pump are matched to work at the moment to form high vacuum, the other vacuum brazing chamber is cooled, and the roots vacuum pump and the slide valve vacuum pump are matched to work at the moment to form low vacuum; when the vacuum brazing chamber works, the Roots vacuum pump and the slide valve vacuum pump stop working, low-temperature inert gas is filled into the vacuum brazing chamber through the gas filling device for further cooling, the two vacuum brazing chambers can work repeatedly and alternately, continuous production is achieved, and the production efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of thermos cup welding, and in particular to a vacuum brazing furnace for brazing thermos cups. Background Art

[0002] Thermos cups are generally made of double-layer stainless steel inside and outside. The inner liner and the outer shell are combined together using brazing technology, and then the air in the interlayer between the inner liner and the outer shell is extracted using vacuum technology to achieve vacuum insulation. Currently, the vacuum brazing furnaces used for welding thermos cups are mostly single-chamber furnaces or multi-chamber continuous furnaces. Among them, single-chamber furnaces have low production efficiency, and multi-chamber continuous furnaces, although efficient, are costly, and when one chamber fails, the other chambers need to be shut down. Utility Model Content

[0003] The purpose of the present application is to provide a vacuum brazing furnace for brazing thermos cups, which to a certain extent solves the technical problem that the vacuum brazing furnaces for welding thermos cups in the prior art are mostly single-chamber furnaces or multi-chamber continuous furnaces, wherein the single-chamber furnaces have low production efficiency, while the multi-chamber continuous furnaces, although highly efficient, have high costs, and when one chamber fails, the other chambers need to be shut down.

[0004] The present application provides a vacuum brazing furnace for brazing a thermos cup, comprising: a first vacuum brazing chamber, a second vacuum brazing chamber, a first connecting pipe, a second connecting pipe, a main pipe, a first valve, a second valve, a third valve, a fourth valve, a Roots vacuum pump, a sliding valve vacuum pump, a diffusion pump, a rotary vane vacuum pump, a main valve, a first inflation device, and a second inflation device; wherein the first vacuum brazing chamber is connected to one side of the main pipe through the first connecting pipe, and the first valve is arranged on the first connecting pipe;

[0005] The second vacuum brazing chamber is connected to the other side of the main pipe member through the second connecting pipe member, and the second valve is arranged on the second connecting pipe member;

[0006] The slide valve vacuum pump is connected to the Roots vacuum pump; the Roots vacuum pump is connected to the first vacuum brazing chamber, and a third valve is arranged between them; the Roots vacuum pump is connected to the second vacuum brazing chamber, and a fourth valve is arranged between them; a first opening is formed at one end of the main pipe component, and the first opening is connected to the Roots vacuum pump, and the main valve is arranged between them; a second opening is formed at the other end of the main pipe component, and the second opening is connected to the diffusion pump;

[0007] The first inflating device is disposed in the first vacuum brazing chamber and is used to inflate the first vacuum brazing chamber; the second inflating device is disposed in the second vacuum brazing chamber and is used to inflate the second vacuum brazing chamber.

[0008] In the above technical solution, further, the vacuum brazing furnace for brazing the thermos cup also includes a first fan, and at least the blades of the first fan are arranged in the first vacuum brazing chamber.

[0009] In any of the above technical solutions, further, the vacuum brazing furnace for brazing the thermos cup also includes a second fan, and at least the blades of the second fan are arranged in the second vacuum brazing chamber.

[0010] In any of the above technical solutions, further, the vacuum brazing furnace for brazing a thermos cup also includes a third connecting pipe fitting, and the third connecting pipe fitting is respectively connected to the vacuum pump and the first vacuum brazing chamber, and the third valve is arranged on the third connecting pipe fitting.

[0011] In any of the above technical solutions, further, the vacuum brazing furnace for brazing the thermos cup also includes a fourth connecting pipe fitting, and the fourth connecting pipe fitting is respectively connected to the vacuum pump and the second vacuum brazing chamber, and the fourth valve is arranged on the fourth connecting pipe fitting.

[0012] In any of the above technical solutions, further, the first vacuum brazing chamber and the second vacuum brazing chamber are both provided with electric heating tubes.

[0013] In any of the above technical solutions, further, the vacuum brazing furnace for brazing the thermos cup also includes an electrical control box, and the electrical control box is electrically connected to the vacuum pump, the first valve, the second valve, the third valve, the fourth valve, the electric heating tube of the first vacuum brazing chamber, and the electric heating tube of the second vacuum brazing chamber respectively.

[0014] In any of the above technical solutions, further, the vacuum brazing furnace for brazing the thermos cup also includes a rotary vane vacuum pump, and the rotary vane vacuum pump is connected to the main pipe component.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The two vacuum brazing chambers in the present application are respectively connected to the vacuum pump and are equipped with corresponding valves, and each vacuum brazing chamber is also respectively equipped with an inflation device, so that one of the two vacuum brazing chambers can be evacuated and heated for brazing, and at this time the diffusion pump and the rotary vane vacuum pump work together to form a high vacuum, and the other vacuum brazing chamber is cooled, and at this time the Roots vacuum pump and the sliding valve vacuum pump work together to form a low vacuum. When the temperature is reduced to the set temperature, the Roots vacuum pump and the sliding valve vacuum pump stop working, and then the inflation device is used to fill the interior with low-temperature inert gas to further cool down. According to this process, the two vacuum brazing chambers can work repeatedly and alternately, realizing continuous production, which helps to improve production efficiency, and because a first connecting pipe fitting, a second connecting pipe fitting, a main pipe fitting, a first valve and a second valve are provided, the two vacuum brazing chambers are independently provided, and when one of them is damaged, it will not affect the operation of the other vacuum brazing chamber, thereby meeting actual production needs.

[0017] Moreover, both vacuum brazing chambers are heated by electric heating tubes, which can be directly connected to 380V AC power without the need for a voltage regulator, thus reducing costs.

[0018] In addition, the two vacuum brazing chambers are equipped with a common electric control box, i.e., a control system, which has fewer parts, a high degree of integration, and lower costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a vacuum brazing furnace for brazing a thermos cup provided in an embodiment of the present application;

[0021] Figure 2 Another structural schematic diagram of the soft light assembly provided in an embodiment of the present application;

[0022] Figure 3 This is a schematic structural diagram of the first vacuum brazing chamber provided in an embodiment of the present application.

[0023] Reference numerals:

[0024] 1-first vacuum brazing chamber, 2-second vacuum brazing chamber, 3-first connecting pipe fitting, 4-second connecting pipe fitting, 5-main pipe fitting, 6-first valve, 7-second valve, 8-third valve, 9-fourth valve, 10-Roots vacuum pump, 11-first inflation device, 12-second inflation device, 13-first fan, 14-second fan, 15-third connecting pipe fitting, 16-fourth connecting pipe fitting, 17-main valve, 18-diffusion pump, 19-sliding valve vacuum pump, 20-rotary vane vacuum pump, 21-electric control box, 22-electric heating tube. DETAILED DESCRIPTION

[0025] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0026] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0027] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] Refer to the following Figures 1 to 3 A vacuum brazing furnace for brazing a thermos cup according to some embodiments of the present application is described.

[0031] See also Figure 1 and Figure 2 As shown, the embodiment of the present application provides a vacuum brazing furnace for brazing a thermos cup, comprising: a first vacuum brazing chamber 1, a second vacuum brazing chamber 2, a first connecting pipe 3, a second connecting pipe 4, a main pipe 5, a first valve 6, a second valve 7, a third valve 8, a fourth valve 9, a Roots vacuum pump, a sliding valve vacuum pump, a diffusion pump, a rotary vane vacuum pump, a main valve, a first charging device 11 and a second charging device 12; wherein the first vacuum brazing chamber 1 is connected to one side of the main pipe 5 through the first connecting pipe 3, and the first valve 6 is arranged on the first connecting pipe 3;

[0032] The second vacuum brazing chamber 2 is connected to the other side of the main pipe 5 via the second connecting pipe 4, and the second valve 7 is arranged on the second connecting pipe 4;

[0033] The slide valve vacuum pump 19 is connected to the Roots vacuum pump 10; the Roots vacuum pump 10 is connected to the first vacuum brazing chamber 1, and a third valve 8 is arranged between them; the Roots vacuum pump 10 is connected to the second vacuum brazing chamber 2, and a fourth valve 9 is arranged between them;

[0034] A first opening is formed at one end of the main pipe component 5, and the first opening is connected to the Roots vacuum pump 10, and a main valve 17 is arranged therebetween; a second opening is formed at the other end of the main pipe component 5, and the second opening is connected to the diffusion pump 18; a rotary vane vacuum pump 20 is connected to the main pipe component 5;

[0035] The first inflating device 11 is disposed in the first vacuum brazing chamber 1 and is used to inflate the first vacuum brazing chamber 1 ; the second inflating device 12 is disposed in the second vacuum brazing chamber 2 and is used to inflate the second vacuum brazing chamber 2 .

[0036] In this embodiment, the two vacuum brazing chambers in the present application are respectively connected to the vacuum pump and are equipped with corresponding valves, and each vacuum brazing chamber is also respectively equipped with an inflation device, so that one of the two vacuum brazing chambers can be evacuated and heated for brazing, and at this time the diffusion pump 18 and the rotary vane vacuum pump 20 work together to form a high vacuum, and the other vacuum brazing chamber is cooled, and at this time the Roots vacuum pump 10 and the sliding valve vacuum pump 19 work together to form a low vacuum. When the temperature is reduced to the set temperature, the Roots vacuum pump 10 and the sliding valve vacuum pump 19 stop working, and then the inflation device is used to fill the interior with low-temperature inert gas to further cool down. The two vacuum brazing chambers can work alternately and repeatedly, realizing continuous production, which helps to improve production efficiency, and because the first connecting pipe fitting 3, the second connecting pipe fitting 4, the main pipe fitting 5, the first valve 6 and the second valve 7 are provided, the two vacuum brazing chambers are independently arranged, and when one of them is damaged, it will not affect the operation of the other vacuum brazing chamber, meeting actual production needs.

[0037] In one embodiment of the present application, preferably, Figure 1 and Figure 3 As shown, the vacuum brazing furnace for brazing a thermos cup further includes a first fan 13 , and at least the blades of the first fan 13 are arranged in the first vacuum brazing chamber 1 .

[0038] In this embodiment, after the first vacuum brazing chamber 1 is filled with inert gas by the first charging device 11, the first fan 13 may be started to stir the airflow and accelerate the cooling speed.

[0039] In one embodiment of the present application, preferably, Figure 1 As shown, the vacuum brazing furnace for brazing a thermos cup further includes a second fan 14 , and at least the blades of the second fan 14 are arranged in the second vacuum brazing chamber 2 .

[0040] In this embodiment, after the second vacuum brazing chamber 2 is filled with inert gas by the second gas filling device 12, the second fan 14 can be started to stir the airflow and accelerate the cooling speed.

[0041] In one embodiment of the present application, preferably, Figure 1 and Figure 2 As shown, the vacuum brazing furnace for brazing a thermos cup further includes a third connecting pipe 15 , and the third connecting pipe 15 is respectively connected to the vacuum pump and the first vacuum brazing chamber 1 , and the third valve 8 is disposed on the third connecting pipe 15 .

[0042] In this embodiment, the third connecting pipe 15 serves to connect the vacuum pump with the first vacuum brazing chamber 1 and provides an installation position for installing the third valve 8 .

[0043] In one embodiment of the present application, preferably, Figure 1 and Figure 2 As shown, the vacuum brazing furnace for brazing a thermos cup further includes a fourth connecting pipe 16 , and the fourth connecting pipe 16 is respectively connected to the vacuum pump and the second vacuum brazing chamber 2 , and the fourth valve 9 is arranged on the fourth connecting pipe 16 .

[0044] In this embodiment, the fourth connecting pipe 16 serves to connect the vacuum pump with the second vacuum brazing chamber 2 and provides an installation position for installing the fourth valve 9 .

[0045] In one embodiment of the present application, preferably, Figure 3 As shown, the first vacuum brazing chamber 1 and the second vacuum brazing chamber 2 are both provided with electric heating tubes 22 .

[0046] In this embodiment, both vacuum brazing chambers are heated by electric heating tubes 22. The electric heating tubes 22 can be directly connected to 380V AC power without the need for a voltage regulator, which is low in cost.

[0047] In one embodiment of the present application, preferably, Figure 1 As shown, the vacuum brazing furnace for brazing thermos cups also includes an electric control box 21, and the electric control box 21 is electrically connected to the Roots vacuum pump 10, the sliding valve vacuum pump 19, the first valve 6, the second valve 7, the third valve 8, the fourth valve 9, the electric heating tube 22 of the first vacuum brazing chamber 1, and the electric heating tube 22 of the second vacuum brazing chamber 2.

[0048] In this embodiment, two vacuum brazing chambers are equipped with a common electric control box 21, i.e., a control system, which has fewer parts, higher integration, and lower cost.

[0049] In one embodiment of the present application, preferably, Figure 1 As shown, the first inflation device 11 and the second inflation device 12 may include an inert gas source and a pump body. The inert gas source is connected to the first vacuum brazing chamber 1 and the second vacuum brazing chamber 2 through the pump body. Of course, it is not limited to this. The inflation device may also be other structures, which can be selected according to actual needs.

[0050] In one embodiment of the present application, preferably, Figure 2 As shown, both the first valve 6 and the second valve 7 can be gate valves. Of course, the present invention is not limited thereto, and the type of valve can also be selected according to actual needs.

[0051] Note: This vacuum brazing furnace for thermos cup brazing can also be used for brazing other products, not just thermos cups.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vacuum brazing furnace for brazing a thermos cup, characterized in that: include: A first vacuum brazing chamber, a second vacuum brazing chamber, a first connecting pipe, a second connecting pipe, a main pipe, a first valve, a second valve, a third valve, a fourth valve, a Roots vacuum pump, a sliding valve vacuum pump, a diffusion pump, a rotary vane vacuum pump, a main valve, a first charging device and a second charging device; wherein the first vacuum brazing chamber is connected to one side of the main pipe through the first connecting pipe, and the first valve is arranged on the first connecting pipe; the second vacuum brazing chamber is connected to the other side opposite to the main pipe through the second connecting pipe, and the second valve is arranged on the second connecting pipe; The sliding valve vacuum pump is connected with the Roots vacuum pump; the Roots vacuum pump is connected with the first vacuum brazing chamber, and a third valve is arranged therebetween; the Roots vacuum pump is connected with the second vacuum brazing chamber, and a fourth valve is arranged therebetween; a first opening is formed at one end of the main pipe component, the first opening is connected with the Roots vacuum pump, and the main valve is arranged therebetween; a second opening is formed at the other end of the main pipe component, and the second opening is connected with the diffusion pump; the rotary vane vacuum pump is connected with the main pipe component; the first inflation device is arranged in the first vacuum brazing chamber, and is used to inflate it; the second inflation device is arranged in the second vacuum brazing chamber, and is used to inflate it.

2. The vacuum brazing furnace for brazing a thermos cup according to claim 1, characterized in that: The vacuum brazing furnace for brazing a thermos cup further comprises a first fan, and at least the blades of the first fan are arranged in the first vacuum brazing chamber.

3. The vacuum brazing furnace for brazing a thermos cup according to claim 1, characterized in that: The vacuum brazing furnace for brazing a thermos cup further comprises a second fan, and at least the blades of the second fan are arranged in the second vacuum brazing chamber.

4. The vacuum brazing furnace for brazing a thermos cup according to claim 1, characterized in that: The vacuum brazing furnace for brazing a thermos cup further comprises a third connecting pipe, and the third connecting pipe is respectively connected to the vacuum pump and the first vacuum brazing chamber, and the third valve is arranged on the third connecting pipe.

5. The vacuum brazing furnace for brazing a thermos cup according to claim 1, characterized in that: The vacuum brazing furnace for brazing a thermos cup further comprises a fourth connecting pipe, and the fourth connecting pipe is respectively connected to the vacuum pump and the second vacuum brazing chamber, and the fourth valve is arranged on the fourth connecting pipe.

6. The vacuum brazing furnace for brazing a thermos cup according to claim 1, characterized in that: The first vacuum brazing chamber and the second vacuum brazing chamber are both provided with electric heating tubes.

7. The vacuum brazing furnace for brazing a thermos cup according to any one of claims 1 to 6, characterized in that: The vacuum brazing furnace for brazing thermos cups also includes an electrical control box, and the electrical control box is electrically connected to the vacuum pump, the first valve, the second valve, the third valve, the fourth valve, the electric heating tube of the first vacuum brazing chamber, and the electric heating tube of the second vacuum brazing chamber respectively.

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