Sealed container welding device

Abstract

The present invention discloses a sealed container welding device, which relates to the technical field of sealed container welding, including: a vacuum cavity, a base, an air pipe, a vacuum pumping device, a gas charging device, a lifting device and a fusion welding beam device; the base is arranged at the bottom of the vacuum cavity, and a gas charging / exhausting interface is provided on the base; the upper end of the air pipe is connected to the gas charging / exhausting interface; the gas charging device and the vacuum pumping device are both connected to the air pipe; the fusion welding beam emitted by the fusion welding beam device passes through the vacuum cavity to weld the container; the lifting device includes a cylinder, a sliding seal and a fixed plate; a welding method for a sealed container welding device. The present invention performs vacuum pumping and gas charging treatment on the container in the vacuum cavity through the air pipe, and the fusion welding beam device welds the container, with a high degree of integration, the vacuum cavity is made of quartz material, and the fusion welding beam of the fusion welding beam device can penetrate the vacuum cavity to weld the container, and multiple processes of vacuum pumping, gas charging and welding can be completed on one device.

Description

Technical Field

[0001] The invention relates to the technical field of sealed container welding, and in particular to a sealed container welding device. Background Art

[0002] Generally, a sealed container filled with gas or vacuum, such as a high-voltage DC relay, as shown in the attached Figure 5 As shown, it is composed of a sealed cavity 9 and an exhaust copper tube 91. The exhaust copper tube 91 is connected to the inside of the sealed cavity 9 to play the role of inflation and exhaust.

[0003] The manufacturing process of a traditional sealed container is to weld and seal the sealed cavity 9 as a whole, leaving a copper exhaust tube 91 for exhaust, and then transfer the sealed cavity 9 to a common exhaust / inflation device, and perform the vacuuming, inflation and sealing of the copper exhaust tube 91 operations in sequence. The entire manufacturing process requires multiple steps and multiple equipment.

[0004] Therefore, the disadvantages of the prior art for making sealed containers are as follows: 1. It uses many equipments, has high manufacturing costs, and has low production efficiency; 2. The exhaust copper pipe 91 is oxidatively corroded after long-term use, and the exhaust copper pipe 91 and the sealed cavity 9 are prone to leakage problems, and the structure is unstable; 3. There are many operating procedures, which wastes labor. Summary of the invention

[0005] In view of the above-mentioned problems, the purpose of the present invention is to provide a sealed container welding device, which solves the technical problems that the existing sealed container production process has many steps and uses a lot of equipment.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A sealed container welding device comprises: a vacuum chamber, which is a quartz chamber, and a first cavity is provided inside the vacuum chamber; a base, which is arranged at the bottom of the vacuum chamber, and a gas charging / exhausting interface for adjusting the internal environment of the first cavity is provided on the base, and a positioning groove for clamping the container is provided on the upper surface of the base, and the positioning groove is located in the first cavity; an air pipe, which is arranged vertically, and the upper end of the air pipe is connected to the gas charging / exhausting interface, and the air pipe is connected to the first cavity; a vacuum device, which is connected to the air pipe, and the vacuum device is used to fill the container with gas. The first cavity is vacuumed; an inflation device, the inflation device is connected to the air pipe, and the inflation device is used to inflate gas into the first cavity; a fusion welding beam device, the fusion welding beam device is arranged above the vacuum cavity, the fusion welding beam emitted by the fusion welding beam device passes through the vacuum cavity and welds the welding surface of the container; a lifting device, the lifting device includes a cylinder, a sliding seal and a fixed plate, the lower end of the piston rod of the cylinder passes through the vacuum cavity and is connected to the fixed plate, the fixed plate is connected to the top of the container, and the sliding seal is provided at the connection between the piston rod of the cylinder and the vacuum cavity.

[0008] The above-mentioned sealed container welding device, wherein a protective outer cover is provided on the base, and a first sealing ring is provided on the connecting surface between the protective outer cover and the base to achieve sealing, the vacuum chamber and the fusion welding beam device are both located inside the protective outer cover, and a second cavity is enclosed between the vacuum chamber and the protective outer cover.

[0009] In the above-mentioned sealed container welding device, a gas supply interface connected to the second cavity is provided on the side wall of the protective outer cover.

[0010] Preferably, the vacuum chamber is filled with hydrogen, and the second cavity is filled with nitrogen.

[0011] In the above-mentioned sealed container welding device, the lower end of the vacuum cavity is open, and the inflation / evacuation interface is connected to the interior of the vacuum cavity.

[0012] In the above-mentioned sealed container welding device, a second sealing ring is provided on the connecting surface between the vacuum chamber and the base to achieve sealing.

[0013] In the above-mentioned sealed container welding device, the cylinder body of the cylinder is fixed in the protective outer cover through a hanging piece.

[0014] In the above-mentioned sealed container welding device, the fusion welding beam device adopts a laser or an electron beam gun.

[0015] Preferably, the base and the vacuum chamber are connected via a fastener.

[0016] A welding method for a sealed container welding device, comprising any one of the sealed container welding devices described above, wherein the container comprises an upper cavity and a lower cavity, a welding surface is formed between the upper cavity and the lower cavity, and the welding method comprises the following steps:

[0017] S1: placing the container into the vacuum chamber, inserting the welding surface of the container into the positioning groove, and locking the vacuum chamber and the base;

[0018] S2: The protective cover and the base are locked, and protective gas is input into the second cavity from the gas input interface to isolate the vacuum cavity from external oxygen. The piston rod of the cylinder contracts to drive the upper cavity of the container to lift upward, and a gap for gas circulation is formed between the upper cavity and the lower cavity of the container;

[0019] S3: starting the vacuum pumping device, which vacuums the first cavity through the air pipe, and the gas in the container is discharged from the gap. When the container is vacuumed, the vacuum pumping device is closed;

[0020] S4: starting the gas charging device, which charges the first cavity with process gas through the gas pipe, so that the process gas in the first cavity enters the container from the gap, and when the container is filled with process gas, closing the gas charging device;

[0021] S5: The piston rod of the cylinder extends to drive the upper chamber of the container (6) to descend, and the upper chamber and the lower chamber of the container (6) are in close contact;

[0022] S6: starting the fusion welding beam device, the fusion welding beam device emits a fusion welding beam to pass through the vacuum chamber, the fusion welding beam welds the welding surface of the container, and the container is made into a sealed container.

[0023] Due to the adoption of the above technology, the present invention has the following positive effects compared with the prior art:

[0024] 1. The sealed container welding device of the present invention arranges an air pipe on the base, and the vacuum pumping device and the inflation device respectively perform vacuum pumping and inflation treatment on the container in the vacuum cavity through the air pipe, and then uses the fusion welding beam device to weld the container. The device has a high degree of integration, reduces the use of exhaust copper pipes, and avoids the risk of leakage at the sealing part of the copper pipe.

[0025] 2. The vacuum chamber of the sealed container welding device of the present invention is made of quartz material. The molten welding beam of the molten welding beam device can penetrate the vacuum chamber and weld the container inside it. Multiple processes of vacuuming, inflation and welding can be completed on one device, with high work efficiency.

[0026] 3. The sealed container welding device of the present invention is covered with a protective outer cover outside the vacuum chamber, and a protective gas is filled between the protective outer cover and the vacuum chamber to isolate the vacuum chamber, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the base and the vacuum chamber of the present invention;

[0028] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0029] Figure 3 It is a structural schematic diagram of the sealed container welding device of the present invention;

[0030] Figure 4 is a schematic diagram of a container of the present invention;

[0031] Figure 5 It is a schematic diagram of a sealed container in the prior art.

[0032] Figure numerals: 1. base; 11. inflation / exhaust interface; 12. positioning groove; 2. vacuum chamber; 21. disc; 22. fastener; 24. first cavity; 25. second sealing ring; 3. fusion welding beam device; 4. air pipe; 5. protective cover; 51. second cavity; 6. container; 61. welding surface; 7. vacuum extraction device; 8. inflation device; 9. sealing chamber; 91. exhaust copper pipe; 10. lifting device; 101. cylinder; 102. sliding seal; 103. fixed plate; 104. hanging piece. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings and specific embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] See also Figure 1 , Figure 2, Figure 3 and Figure 4 As shown, Figure 1 is a schematic diagram of the structure of the base and the vacuum chamber of the present invention, Figure 2 yes Figure 1 The enlarged view of point A in the middle. Figure 3 It is a structural schematic diagram of the sealed container welding device of the present invention; Figure 4 is a schematic diagram of a container of the present invention.

[0037] The sealed container welding device provided in an embodiment of the present invention includes a base 1, a vacuum chamber 2, an air pipe 4, a vacuum pumping device 7, an inflation device 8, a fusion welding beam device 3 and a lifting device. The fusion welding beam device 3 adopts a laser. The container 6 includes an upper chamber and a lower chamber, and a welding surface 61 is formed between the upper chamber and the lower chamber.

[0038] Among them, the vacuum chamber 2 is a quartz chamber, and the laser of the laser can pass through the vacuum chamber 2. The lower end of the vacuum chamber 2 is open, and a first cavity 24 is provided inside the vacuum chamber 2. The first cavity 24 is used to place the container 6. The base 1 is arranged at the bottom of the vacuum chamber 2, and the base 1 and the vacuum chamber 2 are detachably connected. After the container 6 is assembled in the vacuum chamber 2, the vacuum chamber 2 and the base 1 are locked, and a closed cavity is formed in the first cavity 24. An inflation / exhaust interface 11 for adjusting the internal environment of the first cavity 24 is provided on the base 1, and the inflation / exhaust interface 11 is connected to the inside of the vacuum chamber 2. The upper surface of the base 1 is provided with a positioning groove 12 for clamping the container, and the positioning groove 12 is located in the first cavity 24.

[0039] Furthermore, the air pipe 4 is arranged vertically, and the upper end of the air pipe 4 is connected to the inflation / exhaust interface 11, the air pipe 4 is connected to the first cavity 24, the air pipe 4 is used for vacuuming and inflation processing in the vacuum cavity 2, the vacuuming device 7 is connected to the air pipe 4, the vacuuming device 7 is used to vacuum the first cavity 24, the inflation device 8 is connected to the air pipe 4, the inflation device 8 is used to fill the first cavity 24 with process gas, the laser is arranged above the vacuum cavity 2, the laser emitted by the laser passes through the vacuum cavity 2, and welds the welding surface 61 of the container 6.

[0040] The lifting device 10 includes a cylinder 101, a sliding seal 102 and a fixed plate 103. The lower end of the piston rod of the cylinder 101 passes through the vacuum chamber 2 and is connected to the fixed plate 103. The fixed plate 103 is connected to the top of the container 6. A sliding seal 102 is provided at the connection between the piston rod of the cylinder 101 and the vacuum chamber 2. The lifting device 10 is used to drive the upper chamber of the container 6 to rise or fall. When the upper chamber of the container 6 rises, a gap is formed between the upper chamber and the lower chamber, and the interior of the container 6 can be vacuumed or inflated. When the upper chamber of the container 6 descends and is tightly attached to the lower chamber, the welding surface 61 between the upper chamber and the lower chamber can be welded and sealed. The positioning groove 12 plays a positioning role for the container 6, so that the upper chamber and the lower chamber of the container 6 can be accurately matched.

[0041] It should be pointed out that the directional words "upper" and "lower" mentioned in this article are defined based on the relative positions of the components in the drawings of the present invention. This is only for the clarity and convenience of describing the technical solution. It should be understood that the use of these directional words does not constitute a limitation on the scope of protection of this application.

[0042] Compared with the prior art, the present invention provides a sealed container welding device. When in use, the container 6 is placed in the first cavity 24 of the vacuum chamber 2. The welding surface 61 of the container 6 does not need to be welded. The air pipe 4 on the base 1 is vacuumed and inflated in turn by the vacuum device 7 and the gas filling device 8. The gas filling device 8 fills the container 6 with the required process gas, and then the welding surface 61 of the container 6 is welded by the laser head. The interior of the container 6 forms a closed environment, that is, the overall production of the container 6 is completed. The present invention eliminates the use of the exhaust copper tube 91 of the container 6, avoiding the connection between the exhaust copper tube 91 and the container 6 to produce a sealing leakage point. It can be seen that the above-mentioned sealed container welding device can complete the vacuuming, inflation and welding of the container 6 on the same device, optimizes the overall structure, is simple to install during use, improves work efficiency, and reduces labor.

[0043] Among them, a protective cover 5 is arranged on the base 1, and a first sealing ring (not shown in the figure) is arranged on the connecting surface of the protective cover 5 and the base 1 to achieve sealing between the two. The vacuum cavity 2 and the laser head are both located inside the protective cover 5, and a second cavity 51 is surrounded between the vacuum cavity 2 and the protective cover 5. A gas supply interface (not shown in the figure) connected to the second cavity 51 is arranged on the side wall of the protective cover 5, which is used to fill the second cavity 51 with gas. A one-way valve can be arranged in the gas supply interface to prevent leakage from the second cavity 51; when hydrogen is filled in the container 6, nitrogen is filled in the second cavity 51 to isolate the vacuum cavity 2 from external oxygen, thereby avoiding leakage of hydrogen in the vacuum cavity 2, contact between hydrogen and oxygen, and the danger of explosion when encountering open flame or high temperature.

[0044] Furthermore, in order to form a closed cavity in the first cavity 24 when the vacuum cavity 2 and the base 1 are connected, a second sealing ring 25 is provided on the connecting surface between the vacuum cavity 2 and the base 1 , and the cylinder body of the cylinder 101 is fixed in the protective outer cover 5 through a hanging piece 104 .

[0045] Also, the power of the laser is 550-650W.

[0046] Embodiment 2:

[0047] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the sealed container welding device provided by the embodiment of the present invention includes a base 1, a vacuum chamber 2, an air pipe 4, a vacuum pumping device 7, an inflation device 8, a lifting device 10 and a fusion welding beam device 3, and the fusion welding beam device 3 adopts an electron beam gun.

[0048] The lower end of the vacuum chamber 2 is open, and the vacuum chamber 2 is a quartz chamber. The electron beam emitted by the electron beam gun can pass through the vacuum chamber 2. A first cavity 24 is provided inside the vacuum chamber 2, and the first cavity 24 is used to place a container 6. The various components in the container 6 are assembled, and the welding surface 61 of the container 6 does not need to be welded and is placed in the first cavity 24. The base 1 is set at the bottom of the vacuum chamber 2, and an inflation / exhaust interface 11 for adjusting the internal environment of the first cavity 24 is provided on the base 1. The inflation / exhaust interface 11 is connected to the first cavity 24. A disc 21 is fixed to the bottom of the outer wall of the vacuum chamber 2, and a second sealing ring is provided on the connecting surface of the disc 21 and the base 1 to achieve sealing. The disc 21 and the base 1 are detachably connected through a fastener 22.

[0049] In addition, the upper end of the air pipe 4 is connected to the inflation / exhaust interface 11, the air pipe 4 is connected to the first cavity 24, the lower end of the air pipe 4 is provided with two left and right interfaces, the vacuum device 7 and the inflation device 8 are respectively connected to the two interfaces of the air pipe 4, the vacuum device 7 is used to evacuate the first cavity 24, and the inflation device 8 is used to fill the process gas into the first cavity 24, the electron beam gun is arranged directly above the vacuum chamber 2, and the emission port of the electron beam gun is directly facing the welding surface 61 of the container 6, the electron beam emitted by the fusion welding beam device 3 passes through the vacuum chamber 2 and irradiates the container 6 The welding surface 61 is welded, and the upper surface of the base 1 is flat to facilitate the installation of the vacuum chamber 2. The lifting device 10 includes a cylinder 101, a sliding seal 102 and a fixed plate 103. The cylinder 101 is located directly above the vacuum chamber 2. The lower end of the piston rod of the cylinder 101 passes through the vacuum chamber 2 and is connected to the fixed plate 103. The fixed plate 103 is connected to the top of the container 6. A sliding seal 102 is provided at the connection between the piston rod of the cylinder 101 and the vacuum chamber 2. The sliding seal 102 is used for sealing between the piston rod of the cylinder 101 and the vacuum chamber 2.

[0050] Furthermore, a protective outer cover 5 is provided on the base 1, and the vacuum chamber 2 and the electron beam gun are both located inside the protective outer cover 5. A second cavity 51 is enclosed between the vacuum chamber 2 and the protective outer cover 5, and the second cavity 51 is used to be filled with protective gas to isolate the vacuum chamber 2 from external oxygen. The cylinder body of the cylinder 101 is fixed in the protective outer cover 5 by a hanger 104.

[0051] To further optimize the above embodiment, an annular groove (not shown in the figure) is provided on the upper surface of the base 1, and a clamping edge (not shown in the figure) is provided at the lower end of the protective outer cover 5. The clamping edge of the protective outer cover 5 is rotatably connected to the annular groove, and the electron beam gun is fixed in the protective outer cover 5. The rotation of the protective outer cover 5 can drive the rotation of the electron beam gun, so that the electron beam gun can perform welding processing on a circle of the welding surface 61 of the container 6.

[0052] Embodiment 3:

[0053] For further information, see Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a welding method of a sealed container welding device of a preferred embodiment is shown, the container 6 includes an upper cavity and a lower cavity, a welding surface 61 is formed between the upper cavity and the lower cavity, and the welding method includes the following steps:

[0054] S1: Put the container 6 into the first cavity 24 of the vacuum chamber 2, insert the container 6 into the positioning groove 12, and lock the vacuum chamber 2 and the base 1;

[0055] S2: The protective cover 5 and the base 1 are locked, and protective gas is input into the second cavity 51 from the gas supply interface to isolate the vacuum cavity 2 from external oxygen. The piston rod of the cylinder 101 contracts to drive the upper cavity of the container 6 to lift upward, and a gap is formed between the upper cavity and the lower cavity of the container 6 for gas circulation;

[0056] S3: Start the vacuum pumping device 7, which evacuates the first cavity 24 through the air pipe 4, and the gas in the container 6 is discharged from the gap. When the container 6 is evacuated to a vacuum, close the vacuum pumping device 7;

[0057] S4: Start the gas filling device 8, which fills the first cavity 24 with process gas through the gas pipe 4. The process gas in the first cavity 24 enters the container 6 from the gap. When the container 6 is filled with process gas, close the gas filling device 8.

[0058] S5: The piston rod of the cylinder 101 extends to drive the upper chamber of the container 6 to descend, and the upper chamber and the lower chamber of the container 6 are close to each other;

[0059] S6: Start the fusion welding beam device 3, the fusion welding beam device 3 emits a fusion welding beam to pass through the vacuum chamber 2, the fusion welding beam welds the welding surface 61 of the container 6, and the container 6 is made into a sealed container.

[0060] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. The present invention is therefore not limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealed container welding method, characterized in that: The container is welded using a sealed container welding device, the sealed container welding device comprising: A vacuum cavity (2), wherein the vacuum cavity (2) is a quartz cavity, and a first cavity (24) is provided inside the vacuum cavity (2); A base (1), the base (1) being arranged at the bottom of the vacuum chamber (2), the base (1) being provided with an inflation / exhaustion interface (11) for adjusting the internal environment of the first cavity (24), the upper surface of the base (1) being provided with a positioning groove (12) for clamping the container (6), the positioning groove (12) being located in the first cavity (24); An air pipe (4), the air pipe (4) being arranged vertically, the upper end of the air pipe (4) being connected to the inflation / exhaustion interface (11), and the air pipe (4) being in communication with the first cavity (24); A vacuum pumping device (7), the vacuum pumping device (7) being connected to the air pipe (4), and the vacuum pumping device (7) being used to vacuum the first cavity (24); an inflating device (8), the inflating device (8) being connected to the air pipe (4), and the inflating device (8) being used to inflate gas into the first cavity (24); A fusion welding beam device (3), wherein the fusion welding beam device (3) is arranged above the vacuum chamber (2), and the fusion welding beam emitted by the fusion welding beam device (3) passes through the vacuum chamber (2) and welds the welding surface (61) of the container (6); The base (1) is provided with a protective outer cover (5), and a first sealing ring is provided on a connection surface between the protective outer cover (5) and the base (1) to achieve sealing; the vacuum chamber (2) and the fusion welding beam device (3) are both located inside the protective outer cover (5), and a second cavity (51) is enclosed between the vacuum chamber (2) and the protective outer cover (5); A gas supply interface communicating with the second cavity (51) is provided on the side wall of the protective outer cover (5); A lifting device (10), the lifting device (10) comprising a cylinder (101), a sliding seal (102) and a fixed disk (103), the lower end of the piston rod of the cylinder (101) passing through the vacuum chamber (2) and connected to the fixed disk (103), the fixed disk (103) being connected to the top of the container (6), and the sliding seal (102) being provided at the connection between the piston rod of the cylinder (101) and the vacuum chamber (2); The cylinder body of the cylinder (101) is fixed inside the protective outer cover (5) via a hanging piece (104); The container (6) comprises an upper cavity and a lower cavity, wherein the welding surface (61) is formed between the upper cavity and the lower cavity; The welding method comprises the following steps: S1: placing the container (6) into the vacuum chamber (2), the container (6) being inserted into the positioning groove (12), and the vacuum chamber (2) and the base (1) being locked; S2: The protective cover (5) and the base (1) are locked, and protective gas is input into the second cavity (51) from the gas supply interface to isolate the vacuum cavity (2) from external oxygen. The piston rod of the cylinder (101) contracts to drive the upper cavity of the container (6) to move upward, and a gap is formed between the upper cavity and the lower cavity of the container for gas circulation; S3: starting the vacuum pumping device (7), wherein the vacuum pumping device (7) evacuates the first cavity (24) through the air pipe (4), and the gas in the container (6) is discharged from the gap. When the container (6) is evacuated to a vacuum, the vacuum pumping device (7) is closed; S4: starting the gas charging device (8), wherein the gas charging device (8) charges the first cavity (24) with process gas through the gas pipe (4), wherein the process gas in the first cavity (24) enters the container (6) from the gap, and when the container (6) is filled with process gas, closing the gas charging device (8); S5: the piston rod of the cylinder (101) extends to drive the upper chamber of the container (6) to descend, and the upper chamber and the lower chamber of the container (6) are in close contact; S6: starting the fusion welding beam device (3), wherein the fusion welding beam device (3) emits a fusion welding beam that passes through the vacuum chamber (2), and the fusion welding beam welds the welding surface (61) of the container (6), so that the container (6) is made into a sealed container.

2. The sealed container welding method according to claim 1, characterized in that: The lower end of the vacuum cavity (2) is open, and the inflation / exhaust interface (11) is in communication with the interior of the vacuum cavity (2).

3. The sealed container welding method according to claim 2, characterized in that: A second sealing ring (25) is provided on the connection surface between the vacuum chamber (2) and the base (1) to achieve sealing.

4. The sealed container welding method according to claim 1, characterized in that: The fusion welding beam device (3) adopts a laser or an electron beam gun.

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