Vacuum nitrogen protection device

Abstract

The invention discloses a vacuum nitrogen protection device, and particularly relates to the technical field of welding protection, the vacuum nitrogen protection device comprises a device base, supporting longitudinal frames are fixedly mounted on the two sides of the top end of the device base, a device top frame is fixedly mounted on the tops of the two supporting longitudinal frames, and a set of lifting air cylinders are fixedly mounted on the two sides of the device top frame; a first nitrogen protection frame is fixedly installed at the driving end of one lifting air cylinder, a second nitrogen protection frame is fixedly installed at the driving end of the other lifting air cylinder, and a gas guide mechanism is arranged between the first nitrogen protection frame and the second nitrogen protection frame. According to the device, the first nitrogen protection frame and the second nitrogen protection frame are arranged, and the supporting mechanism and the welding assembly are used in cooperation, so that effective vacuum nitrogen protection welding can be continuously conducted on multiple sets of welding parts; and the overall welding efficiency of the welding part is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding protection, and specifically relates to a vacuum nitrogen protection device. Background Art

[0002] Air separation gases refer to various gases extracted from air through air separation technology, mainly including oxygen, nitrogen, argon, etc. These gases have a wide range of applications in industrial production and daily life. Among them, nitrogen can be used as a protective gas in chemical production to prevent oxidation reactions. In the food industry, nitrogen is used for packaging to extend the shelf life of food. In addition, nitrogen is also used as a welding protection gas in the electronics manufacturing industry and as a cooling medium in metal heat treatment, etc. Using nitrogen protection during welding is mainly to prevent the oxidation and other adverse reactions of metals during the welding process. Nitrogen is an inert gas that can effectively isolate the welding area from oxygen in the air and reduce the defects generated during welding. Especially when welding some high-alloy materials or stainless steels, the quality and corrosion resistance of the welded joints are improved.

[0003] In traditional nitrogen protection for welding, nitrogen is mostly connected to the welding head position, and nitrogen is continuously sprayed at the welding head position to protect the welding point with nitrogen. While protecting the welding with nitrogen, nitrogen will be continuously discharged into the air, resulting in nitrogen waste. Therefore, continuous nitrogen discharge is required for protection during welding, increasing the welding cost. For this reason, we propose a vacuum nitrogen protection device to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a vacuum nitrogen protection device to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A vacuum nitrogen protection device includes a device base. On both sides of the top of the device base, there are fixedly installed support longitudinal frames. On the top of the two support longitudinal frames, there is fixedly installed a device top frame. On both sides of the device top frame, there is fixedly installed a group of lifting cylinders. The driving end of one group of lifting cylinders is fixedly installed with a first nitrogen protection frame, and the driving end of the other group of lifting cylinders is fixedly installed with a second nitrogen protection frame. There is a gas guiding mechanism between the first nitrogen protection frame and the second nitrogen protection frame. On the top of the device base, there are fixedly installed two groups of first linear electric rails symmetrically distributed. The driving ends of the first linear electric rails are fixedly installed with two support mechanisms. The top of the support mechanism is movably clamped at the bottom of the corresponding first nitrogen protection frame and second nitrogen protection frame. In both the first nitrogen protection frame and the second nitrogen protection frame, there is fixedly installed a welding component.

[0006] Preferably, a first exhaust head and a first intake head are fixedly clamped at the top end of the first nitrogen protection frame, a second exhaust head and a second intake head are fixedly clamped at the top end of the second nitrogen protection frame, exhaust pipes are fixedly clamped on the opposite sides of the first nitrogen protection frame and the second nitrogen protection frame, first valves are fixedly installed at the ends of the exhaust pipes, vacuum pumps are fixedly installed on both sides of the top end of the device base, air extraction pipes are fixedly installed at the air extraction ends of the vacuum pumps, one end of the air extraction pipe far away from the vacuum pump is fixedly installed with the corresponding end of the first valve, and a pressure detector and a gas concentration monitor are fixedly installed on both the first nitrogen protection frame and the second nitrogen protection frame.

[0007] Preferably, the air guiding mechanism includes a first air guiding member and a second air guiding member. The first air guiding member includes a second valve and a third valve. The second valve is fixedly installed at the end of the first exhaust head, the third valve is fixedly installed at the end of the second intake head, a first air extraction pump is fixedly installed at one end of the third valve far away from the second intake head, a gas purification member is fixedly installed at one end of the second valve far away from the first exhaust head, a gas concentration detector is fixedly installed at one end of the gas purification member far away from the second valve, a first three-way pipe is fixedly installed at one end of the gas concentration detector far away from the gas purification member, a first connection head is fixedly installed at one end of the first three-way pipe far away from the gas concentration detector, a second connection head is fixedly installed at one end of the first air extraction pump far away from the third valve, a first air guiding hose is fixedly installed between the first connection head and the second connection head, a fourth valve is fixedly installed at one end of the first three-way pipe far away from the gas concentration detector and the first connection head, a second air guiding hose is fixedly installed at one end of the fourth valve far away from the first three-way pipe. The structure of the second air guiding member is the same as that of the first air guiding member. The second air guiding member is fixedly installed at the end of the second exhaust head through the second valve, and the second air guiding member is fixedly installed at the end of the second intake head through the third valve. A second three-way pipe is fixedly installed between the second air guiding hose in the first air guiding member and the second air guiding hose in the second air guiding member. The second three-way pipe is fixedly clamped in the middle of the device top frame, and a second air extraction pump is fixedly installed at the top end of the second three-way pipe.

[0008] Preferably, the gas purification member includes a purification outer cylinder, connection pipes are fixedly installed at both ends of the purification outer cylinder, the ends of the two connection pipes are respectively fixedly installed with the ends of the second valve and the gas concentration detector, a purification inner pipe is movably clamped in the purification outer cylinder, and a gas purification core is fixedly clamped in the purification inner pipe.

[0009] Preferably, a nitrogen generation device is fixedly installed in the middle of the top end of the device base, an air delivery pipe is fixedly installed at the output port of the nitrogen generation device, and the end of the air delivery pipe is fixedly installed with the top end of the second air extraction pump.

[0010] Preferably, the support mechanism includes a support base, in the middle of the top end of the support base, a sealing clamping frame is integrally formed. The sealing clamping frame is movably clamped at the bottom of the corresponding first nitrogen protection frame and second nitrogen protection frame. A sealing gasket is arranged on the upper surface of the support base. The upper surface of the sealing gasket is respectively in contact with the lower surfaces of the corresponding first nitrogen protection frame and second nitrogen protection frame. A bearing is fixedly clamped in the middle of the support base. A rotating shaft is fixedly clamped in the middle of the bearing. A placing table is fixedly installed at the top end of the rotating shaft. A driven gear ring is fixedly installed at the bottom of the rotating shaft. A driving gear is meshed and connected to the outside of the driven gear ring. A driving shaft is fixedly installed in the middle of the driving gear. The driving shaft is rotatably installed at the bottom end of the support base.

[0011] Preferably, a first cover is fixedly installed at the bottom end of the support base. A driving motor is fixedly installed at the bottom end of the first cover. The driving end of the driving motor is fixedly installed with the bottom end of the driving shaft.

[0012] Preferably, a second cover is fixedly installed at the bottom end of the first cover. The driving motor is located in the second cover. The support mechanism is fixedly installed at the driving end of the first linear electric rail through the second cover.

[0013] Preferably, the welding assembly includes two second linear electric rails. The welding assemblies are respectively fixedly installed inside the first nitrogen protection frame and the second nitrogen protection frame through the second linear electric rails. A third linear electric rail is fixedly installed at the driving ends of the two second linear electric rails. A cylinder support is fixed at the driving end of the third linear electric rail. An electric lifting rod is fixedly installed on the cylinder support. A rotating cylinder is fixedly installed at the driving end of the electric lifting rod. An installation bracket is fixedly installed at the driving end of the rotating cylinder. A welding head is fixedly installed at the end of the installation bracket.

[0014] Preferably, observation windows are fixedly installed at the side ends of the first nitrogen protection frame and the second nitrogen protection frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By arranging the first nitrogen protection frame and the second nitrogen protection frame, and cooperating with the support mechanism and the welding assembly, effective vacuum nitrogen protection welding can be continuously carried out on multiple groups of welding components, improving the overall welding efficiency of the welding components.

[0017] 2. By arranging the first nitrogen protection frame and the second nitrogen protection frame, and cooperating with the support mechanism and the air guiding mechanism, multiple recycling and purification of nitrogen can be carried out between the first nitrogen protection frame and the second nitrogen protection frame, and nitrogen can be used multiple times, preventing nitrogen from being directly discharged into the air and causing waste.

[0018] 3. By setting up a nitrogen generation device, during the recycling process, if the nitrogen concentration in the first nitrogen protection frame or the second nitrogen protection frame is insufficient, the nitrogen generation device can be used to supplement nitrogen to the first nitrogen protection frame or the second nitrogen protection frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the present invention.

[0021] Figure 2 It is a schematic structural connection diagram of the present invention from another angle.

[0022] Figure 3 It is a schematic structural connection diagram of the first nitrogen protection frame, the second nitrogen protection frame and the air guiding mechanism in the present invention.

[0023] Figure 4 It is a partial schematic structural connection diagram of the air guiding mechanism in the present invention.

[0024] Figure 5 It is a schematic structural diagram of the gas purification component in the present invention.

[0025] Figure 6 It is a schematic structural connection diagram of the first nitrogen protection frame and the support mechanism in the present invention.

[0026] Figure 7 It is a schematic structural diagram of the welding component in the present invention.

[0027] Figure 8 It is a schematic structural diagram of the support mechanism in the present invention.

[0028] In the figure: 1. Device base; 11. Support longitudinal frame; 12. Device top frame; 13. Lifting cylinder; 14. First linear electric rail; 2. First nitrogen protection frame; 21. First exhaust head; 22. First intake head; 201. Observation window; 23. Exhaust pipe; 231. First valve; 24. Air pressure detector; 241. Gas concentration monitor; 3. Second nitrogen protection frame; 31. Second exhaust head; 32. Second intake head; 4. Air guiding mechanism; 5. Support mechanism; 6. Nitrogen generation equipment; 61. Gas transmission pipeline; 7. Vacuum pumping machine; 71. Air extraction pipeline; 8. Welding assembly; 41. First air guiding part; 42. Second air guiding part; 43. Second valve; 431. Third valve; 44. First air extraction pump; 45. Gas purification part; 46. Gas concentration detector; 47. First three-way pipe; 48. First connector; 481. Second connector; 482. First air guiding hose; 49. Fourth valve; 491. Second air guiding hose; 410. Second three-way pipe; 411. Second air extraction pump; 451. Purification outer cylinder; 452. Connecting pipe; 453. Purification inner pipe; 454. Gas purification core; 51. Support base; 511. Sealing clamping frame; 512. Sealing gasket; 52. Bearing; 521. Rotating shaft; 522. Driven gear ring; 523. Driving shaft; 524. Driving gear; 53. Placing table; 54. First cover; 55. Driving motor; 56. Second cover; 81. Second linear electric rail; 82. Third linear electric rail; 83. Cylinder support; 84. Electric lifting rod; 85. Rotary cylinder; 86. Mounting bracket; 87. Welding end. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment: As Figure 1-8As shown in the figure, the present invention provides a vacuum nitrogen protection device, including a device base 1. On both sides of the top end of the device base 1, support longitudinal frames 11 are fixedly installed. At the top of the two support longitudinal frames 11, a device top frame 12 is fixedly installed. On both sides of the device top frame 12, a group of lifting cylinders 13 are fixedly installed. The driving end of one group of lifting cylinders 13 is fixedly installed with a first nitrogen protection frame 2, and the driving end of the other group of lifting cylinders 13 is fixedly installed with a second nitrogen protection frame 3. By controlling the opening of the lifting cylinders 13 to drive the first nitrogen protection frame 2 to lift and by controlling the opening of the lifting cylinders 13 to drive the second nitrogen protection frame 3 to lift, a gas guiding mechanism 4 is arranged between the first nitrogen protection frame 2 and the second nitrogen protection frame 3. On the top end of the device base 1, two groups of first linear electric rails 14 are symmetrically fixedly installed. The driving ends of the first linear electric rails 14 are fixedly installed with two support mechanisms 5 respectively. The tops of the support mechanisms 5 are movably clamped to the bottoms of the corresponding first nitrogen protection frame 2 and second nitrogen protection frame 3. By setting the support mechanisms 5 to cooperate with the first nitrogen protection frame 2 and the second nitrogen protection frame 3, it is convenient to place the welding parts in the support mechanism 5 and the first nitrogen protection frame 2 or the support mechanism 5 and the second nitrogen protection frame 3 for vacuum nitrogen protection welding later. And by arranging two support mechanisms 5 at the driving ends of each group of first linear electric rails 14, it is convenient that while one support mechanism 5 cooperates with the first nitrogen protection frame 2 and the second nitrogen protection frame 3, the other support mechanism 5 is exposed outside for loading or unloading the welding parts. Welding components 8 are fixedly installed in both the first nitrogen protection frame 2 and the second nitrogen protection frame 3.

[0031] At the top end of the first nitrogen protection frame 2, a first exhaust head 21 and a first intake head 22 are fixedly clamped. At the top end of the second nitrogen protection frame 3, a second exhaust head 31 and a second intake head 32 are fixedly clamped. On the opposite sides of the first nitrogen protection frame 2 and the second nitrogen protection frame 3, exhaust pipes 23 are fixedly clamped. At the ends of the exhaust pipes 23, first valves 231 are fixedly installed. On both sides of the top end of the device base 1, vacuum pumping machines 7 are fixedly installed. The air extraction ends of the vacuum pumping machines 7 are fixedly installed with air extraction pipes 71. One end of the air extraction pipe 71 far from the vacuum pumping machine 7 is fixedly installed with the end of the corresponding first valve 231. Pressure detectors 24 and gas concentration monitors 241 are fixedly installed on both the first nitrogen protection frame 2 and the second nitrogen protection frame 3; Observation windows 201 are fixedly installed on the side ends of the first nitrogen protection frame 2 and the second nitrogen protection frame 3. Through the observation windows 201, observe the vacuum nitrogen protection welding condition of the welding parts in the first nitrogen protection frame 2 and the second nitrogen protection frame 3;

[0032] The support mechanism 5 includes a support base 51. In the middle of the top end of the support base 51, a sealing clamping frame 511 is integrally formed. The sealing clamping frame 511 is movably clamped to the bottoms of the corresponding first nitrogen protection frame 2 and second nitrogen protection frame 3. A sealing gasket 512 is provided on the upper surface of the support base 51. The upper surface of the sealing gasket 512 is in contact with the lower surfaces of the corresponding first nitrogen protection frame 2 and second nitrogen protection frame 3 respectively, so as to seal between the support base 51 and the corresponding first nitrogen protection frame 2 and second nitrogen protection frame 3. A bearing 52 is fixedly clamped in the middle of the support base 51. A rotating shaft 521 is fixedly clamped in the middle of the bearing 52. A placing table 53 is fixedly installed at the top end of the rotating shaft 521. During use, the parts to be welded can be positioned and placed on the placing table 53 for limiting, which is convenient for subsequent hollow nitrogen protection welding. A driven gear ring 522 is fixedly installed at the bottom of the rotating shaft 521. A driving gear 524 is meshed and connected to the outside of the driven gear ring 522. A driving shaft 523 is fixedly installed in the middle of the driving gear 524. The driving shaft 523 is rotatably installed at the bottom end of the support base 51; A first cover 54 is fixedly installed at the bottom end of the support base 51. A driving motor 55 is fixedly installed at the bottom end of the first cover 54. The driving end of the driving motor 55 is fixedly installed with the bottom end of the driving shaft 523; A second cover 56 is fixedly installed at the bottom end of the first cover 54. The driving motor 55 is located in the second cover 56. The support mechanism 5 is fixedly installed at the driving end of the first linear electric rail 14 through the second cover 56. By controlling the opening of the driving motor 55 to drive the driving shaft 523 and the driving gear 524 to drive the driven gear ring 522 and the rotating shaft 521 to rotate, the placing table 53 can be driven to rotate, so as to adjust the angle of the welding parts for subsequent welding.

[0033] By controlling the opening of the vacuum pump 7 at the position of the first nitrogen protection frame 2 or the second nitrogen protection frame 3, the first nitrogen protection frame 2 or the second nitrogen protection frame 3 can be evacuated. The air pressure in the first nitrogen protection frame 2 or the second nitrogen protection frame 3 is detected by the air pressure detector 24, and the gas concentration in the first nitrogen protection frame 2 or the second nitrogen protection frame 3 is detected by the gas concentration monitor 241 until the first nitrogen protection frame 2 or the second nitrogen protection frame 3 is evacuated.

[0034] The air guiding mechanism 4 includes a first air guiding member 41 and a second air guiding member 42. The first air guiding member 41 includes a second valve 43 and a third valve 431. The second valve 43 is fixedly installed at the end of the first exhaust head 21, and the third valve 431 is fixedly installed at the end of the second intake head 32. A first air extraction pump 44 is fixedly installed at one end of the third valve 431 away from the second intake head 32. A gas purification member 45 is fixedly installed at one end of the second valve 43 away from the first exhaust head 21. A gas concentration detector 46 is fixedly installed at one end of the gas purification member 45 away from the second valve 43. By setting the gas concentration detector 46, the concentration of the purified nitrogen in the first air guiding member 41 or the second air guiding member 42 can be detected, so as to supplement nitrogen immediately. A first three-way pipe 47 is fixedly installed at one end of the gas concentration detector 46 away from the gas purification member 45. A first connector 48 is fixedly installed at one end of the first three-way pipe 47 away from the gas concentration detector 46. A second connector 481 is fixedly installed at one end of the first air extraction pump 44 away from the third valve 431. A first air guiding hose 482 is fixedly installed between the first connector 48 and the second connector 481. A fourth valve 49 is fixedly installed at one end of the first three-way pipe 47 away from the gas concentration detector 46 and the first connector 48. A second air guiding hose 491 is fixedly installed at one end of the fourth valve 49 away from the first three-way pipe 47. The structure of the second air guiding member 42 is the same as that of the first air guiding member 41. The second air guiding member 42 is fixedly installed at the end of the second exhaust head 31 through the second valve 43, and the second air guiding member 42 is fixedly installed at the end of the second intake head 32 through the third valve 431. A second three-way pipe 410 is fixedly installed between the second air guiding hose 491 in the first air guiding member 41 and the second air guiding hose 491 in the second air guiding member 42. The second three-way pipe 410 is fixedly clamped in the middle of the device top frame 12. A second air extraction pump 411 is fixedly installed at the top of the second three-way pipe 410;

[0035] A nitrogen generation device 6 is fixedly installed in the middle of the top end of the device base 1. An air delivery pipeline 61 is fixedly installed at the output port of the nitrogen generation device 6. The end of the air delivery pipeline 61 is fixedly installed with the top end of the second air extraction pump 411;

[0036] In the initial state, there is no nitrogen in the first nitrogen protection frame 2 or the second nitrogen protection frame 3. At this time, first use the first nitrogen protection frame 2 to perform vacuum nitrogen protection welding on the welded parts. Vacuumize the first nitrogen protection frame 2, and then control to turn on the first air extraction pump 44, the third valve 431 and the fourth valve 49 in the second air guiding member 42, and turn on the nitrogen generation device 6 and the second air extraction pump 411. After the nitrogen is generated, it is introduced into the first nitrogen protection frame 2 through the air delivery pipeline 61, the second three-way pipe 410, the second air guiding hose 491 in the second air guiding member 42, the first three-way pipe 47, and the first air guiding hose 482 until the first nitrogen protection frame 2 is filled with nitrogen at a suitable concentration.

[0037] The gas purification component 45 includes a purification outer cylinder 451. Connecting pipes 452 are fixedly installed at both ends of the purification outer cylinder 451. The ends of the two connecting pipes 452 are respectively fixedly installed with the ends of the second valve 43 and the gas concentration detector 46. A purification inner pipe 453 is movably clamped in the purification outer cylinder 451, and a gas purification core 454 is fixedly clamped in the purification inner pipe 453. After the welding of the welded parts in the first nitrogen protection frame 2 is completed, some welding exhaust gases will be generated. When the subsequent nitrogen and welding exhaust gases are introduced into the second nitrogen protection frame 3 through the first air guiding component 41 for recycling, they are effectively purified by the gas purification core 454 in the gas purification component 45. The welding exhaust gases are adsorbed in the gas purification core 454, and the pure nitrogen is recycled and introduced into the second nitrogen protection frame 3 for secondary use, preventing the direct discharge of nitrogen into the air and causing waste. At the same time, after the welding of the welded parts in the second nitrogen protection frame 3 is completed, some welding exhaust gases will be generated. When the subsequent nitrogen and welding exhaust gases are introduced into the first nitrogen protection frame 2 through the second air guiding component 42 for recycling again, they are effectively purified by the gas purification core 454 in the gas purification component 45. The welding exhaust gases are adsorbed in the gas purification core 454, and the pure nitrogen is recycled and introduced into the first nitrogen protection frame 2 for multiple uses, further preventing the waste of nitrogen and effectively improving the welding effect of the welded parts and the use effect of the vacuum nitrogen protection device;

[0038] During the recycling process, if the nitrogen concentration in the first nitrogen protection frame 2 or the second nitrogen protection frame 3 is insufficient, nitrogen can be supplemented to the first nitrogen protection frame 2 or the second nitrogen protection frame 3 by using the nitrogen generation device 6.

[0039] The welding assembly 8 includes two second linear electric rails 81. The welding assembly 8 is respectively fixedly installed on the inner sides of the first nitrogen protection frame 2 and the second nitrogen protection frame 3 through the second linear electric rails 81. The driving ends of the two second linear electric rails 81 are fixedly installed with a third linear electric rail 82. A cylinder bracket 83 is fixed at the driving end of the third linear electric rail 82. An electric lifting rod 84 is fixedly installed on the cylinder bracket 83. The driving end of the electric lifting rod 84 is fixedly installed with a rotary cylinder 85. The driving end of the rotary cylinder 85 is fixedly installed with a mounting bracket 86. A welding head 87 is fixedly installed at the end of the mounting bracket 86. By controlling the opening of the second linear electric rail 81 to drive the welding head 87 to move in the X-axis direction, by controlling the opening of the third linear electric rail 82 to drive the welding head 87 to move in the Y-axis direction, by controlling the opening of the cylinder bracket 83 to drive the welding head 87 to move in the Z-axis direction, and by controlling the opening of the rotary cylinder 85 to drive the welding head 87 to rotate, the position and angle of the welding head 87 can be flexibly adjusted, so as to use the welding head 87 to perform flexible vacuum nitrogen protection welding on the welded parts and improve the welding effect and quality of the welded parts.

[0040] Working principle: When in use, first use the first nitrogen protection box 2 to perform vacuum nitrogen protection welding on the welding parts. After positioning the two welding parts to be welded, place them on the placement table 53 of one of the positions of the first nitrogen protection box 2 for limiting. Subsequently, control the first linear electric rail 14 at the position of the first nitrogen protection box 2 to drive the corresponding placement table 53 to move horizontally, so that the placement table 53 moves below the first nitrogen protection box 2. At this time, the other placement table 53 and the first nitrogen protection box 2 are misaligned, facilitating the subsequent placement of the next set of welding parts waiting for welding;

[0041] Subsequently, control the lifting cylinder 13 at the position of the first nitrogen protection box 2 to drive the first nitrogen protection box 2 to descend until the sealing clamping frame 511 is movably clamped at the bottom of the corresponding first nitrogen protection box 2, so that the upper surface of the sealing gasket 512 contacts the lower surface of the corresponding first nitrogen protection box 2 to seal between the support base 51 and the corresponding first nitrogen protection box 2;

[0042] At this time, a set of welding parts to be welded can also be positioned and placed on the placement table 53 of one of the positions of the second nitrogen protection box 3 for limiting, and control the corresponding first linear electric rail 14 to drive the placement table 53 to move below the second nitrogen protection box 3, and control the second nitrogen protection box 3 to descend and seal with the corresponding placement table 53;

[0043] Subsequently, control the vacuum pump 7 at the position of the first nitrogen protection box 2 or the second nitrogen protection box 3 to evacuate the first nitrogen protection box 2 or the second nitrogen protection box 3. Detect the air pressure in the first nitrogen protection box 2 or the second nitrogen protection box 3 through the air pressure detector 24, and detect the gas concentration in the first nitrogen protection box 2 or the second nitrogen protection box 3 through the gas concentration monitor 241 until the first nitrogen protection box 2 or the second nitrogen protection box 3 is evacuated;

[0044] Subsequently, control the first air extraction pump 44, the third valve 431 and the fourth valve 49 in the second air guiding member 42 to be opened, and open the nitrogen generation device 6 and the second air extraction pump 411. After nitrogen is generated, it is introduced into the first nitrogen protection box 2 through the gas transmission pipeline 61, the second three-way pipe 410, the second air guiding hose 491 in the second air guiding member 42, the first three-way pipe 47 and the first air guiding hose 482 until the first nitrogen protection box 2 is filled with nitrogen at a suitable concentration;

[0045] Subsequently, the welding assembly 8 in the first nitrogen protection frame 2 is controlled to start. By controlling the start of the second linear electric rail 81, the welding end 87 is driven to move in the X-axis direction. By controlling the start of the third linear electric rail 82, the welding end 87 is driven to move in the Y-axis direction. By controlling the start of the cylinder bracket 83, the welding end 87 is driven to move in the Z-axis direction. By controlling the start of the rotary cylinder 85, the welding end 87 is driven to rotate, so as to flexibly adjust the position and angle of the welding end 87, so that the welding end 87 can be used to perform flexible vacuum nitrogen protection welding on the welding parts. Through the observation window 201, observe the vacuum nitrogen protection welding status of the welding parts in the first nitrogen protection frame 2 and the second nitrogen protection frame 3;

[0046] After the welding of the welding parts in the first nitrogen protection frame 2 is completed, some welding exhaust gases will be generated. Subsequently, the second valve 43, the third valve 431 and the first air extraction pump 44 in the first air guiding member 41 are opened. The nitrogen and welding exhaust gases in the first nitrogen protection frame 2 are introduced into the second nitrogen protection frame 3 through the gas purification member 45, the gas concentration detector 46, the first three-way pipe 47 and the first air guiding hose 482 in the first air guiding member 41 for recycling. Through the gas purification core 454 in the gas purification member 45, effective purification is carried out, and the welding exhaust gases are adsorbed in the gas purification core 454. The pure nitrogen is recovered and recycled into the second nitrogen protection frame 3 for secondary use, preventing the direct discharge of nitrogen into the air and causing waste;

[0047] When the nitrogen in the first nitrogen protection frame 2 is exhausted, the second valve 43, the third valve 431 and the first air extraction pump 44 in the first air guiding member 41 are closed, and the first nitrogen protection frame 2 is controlled to rise, and the two support bases 51 at the first nitrogen protection frame 2 are controlled to move horizontally. Move another support base 51 with the next group of welding parts placed thereon to the lower part of the first nitrogen protection frame 2, and then lower the first nitrogen protection frame 2 and the corresponding support base 51 again for sealing and evacuating the first nitrogen protection frame 2 again, for loading the next group of welding parts. And after the welding parts at the position of the first nitrogen protection frame 2 in the previous group are welded, the welding parts and the first nitrogen protection frame 2 are misaligned, which is convenient for unloading, and at the same time, another group of welding parts to be welded are placed on the support base 51 to continue the subsequent welding. In this way, continuous and uninterrupted vacuum nitrogen protection welding of the welding parts can be realized, improving the overall welding efficiency of the welding parts;

[0048] Until the welding of the welding parts in the second nitrogen protection frame 3 is completed, the nitrogen is introduced into the first nitrogen protection frame 2 through the second air guiding member 42 for recycling again. Through the gas purification core 454 in the gas purification member 45, effective purification is carried out, and the welding exhaust gases are adsorbed in the gas purification core 454. The pure nitrogen is recovered and recycled into the first nitrogen protection frame 2 for multiple uses, further preventing nitrogen waste and effectively improving the welding effect of the welding parts and the use effect of the vacuum nitrogen protection device;

[0049] And the steps of loading, unloading and reloading the welded parts on the support base 51 at the position of the first nitrogen protection frame 2 are used to load, unload and reload the welded parts on the support base 51 at the position of the second nitrogen protection frame 3, so as to realize the continuous vacuum nitrogen protection welding of the welded parts and improve the overall welding efficiency of the welded parts;

[0050] During the recycling period, by using the gas concentration detectors 46 of the first air guiding member 41 and the second air guiding member 42, the concentration of the purified nitrogen in the first air guiding member 41 or the second air guiding member 42 is detected. If the nitrogen concentration in the first nitrogen protection frame 2 or the second nitrogen protection frame 3 is insufficient when recycled and introduced, the nitrogen generation device 6 can directly supplement nitrogen to the first nitrogen protection frame 2 or the second nitrogen protection frame 3. Only by controlling the opening of the fourth valve 49, the first air extraction pump 44 and the third valve 431 in the first air guiding member 41, the nitrogen generation device 6 will introduce nitrogen into the second nitrogen protection frame 3 through the first air guiding member 41 for nitrogen supplementation, or by controlling the opening of the fourth valve 49, the first air extraction pump 44 and the third valve 431 in the second air guiding member 42, the nitrogen generation device 6 will introduce nitrogen into the first nitrogen protection frame 2 through the second air guiding member 42 for nitrogen supplementation. The nitrogen concentration in the first nitrogen protection frame 2 and the second nitrogen protection frame 3 is monitored by the gas concentration monitors 241 in the first nitrogen protection frame 2 and the second nitrogen protection frame 3.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum nitrogen protection device, comprising a device base (1), characterized in that: Support longitudinal frames (11) are fixedly mounted on both sides of the top of the device base (1), and device top frames (12) are fixedly mounted on the tops of the two support longitudinal frames (11). A group of lifting cylinders (13) are fixedly mounted on both sides of the device top frames (12), wherein a first nitrogen protection frame (2) is fixedly mounted on the driving end of one group of lifting cylinders (13), and a second nitrogen protection frame (3) is fixedly mounted on the driving end of the other group of lifting cylinders (13), and an air guide mechanism (4) is provided between the first nitrogen protection frame (2) and the second nitrogen protection frame (3). Two groups of symmetrically distributed first linear electric rails (14) are fixedly mounted on the top of the device base (1), and two support mechanisms (5) are fixedly mounted on the driving ends of the first linear electric rails (14), and the tops of the support mechanisms (5) are movably clamped on the bottoms of the corresponding first nitrogen protection frame (2) and the second nitrogen protection frame (3), and welding components (8) are fixedly mounted in the first nitrogen protection frame (2) and the second nitrogen protection frame (3).

2. A vacuum nitrogen protection device according to claim 1, characterized in that: The top of the first nitrogen protection frame (2) is fixedly provided with a first exhaust head (21) and a first intake head (22); the top of the second nitrogen protection frame (3) is fixedly provided with a second exhaust head (31) and a second intake head (32); the first nitrogen protection frame (2) and the second nitrogen protection frame (3) are both fixedly provided with exhaust pipes (23) on opposite sides thereof; the ends of the exhaust pipes (23) are both fixedly installed with first valves (231); both sides of the top of the device base (1) are fixedly installed with vacuum pumps (7); the exhaust ends of the vacuum pumps (7) are both fixedly installed with exhaust pipes (71); the exhaust pipes (71) are fixedly installed at one end away from the vacuum pumps (7) and at the end corresponding to the first valve (231); and the first nitrogen protection frame (2) and the second nitrogen protection frame (3) are both fixedly installed with air pressure detectors (24) and gas concentration monitors (241).

3. A vacuum nitrogen protection device according to claim 2, characterized in that: The air guide mechanism (4) comprises a first air guide member (41) and a second air guide member (42); the first air guide member (41) comprises a second valve (43) and a third valve (431); the second valve (43) is fixedly mounted at the end of the first exhaust head (21); the third valve (431) is fixedly mounted at the end of the second intake head (32); a first air pump (44) is fixedly mounted at one end of the third valve (431) away from the second intake head (32); and the second valve (43) is fixedly mounted at one end of the third valve (431) away from the first exhaust head (21). A gas purification component (45) is fixedly installed at one end, a gas concentration detector (46) is fixedly installed at one end of the gas purification component (45) away from the second valve (43), a first three-way pipe (47) is fixedly installed at one end of the gas concentration detector (46) away from the gas purification component (45), a first connector (48) is fixedly installed at one end of the first three-way pipe (47) away from the gas concentration detector (46), and a second connector (481) is fixedly installed at one end of the first vacuum pump (44) away from the third valve (431). A first air guide hose (482) is fixedly installed between the first connector (48) and the second connector (481); a fourth valve (49) is fixedly installed on one end of the first three-way pipe (47) away from the gas concentration detector (46) and the first connector (48); a second air guide hose (491) is fixedly installed on one end of the fourth valve (49) away from the first three-way pipe (47); the structure of the second air guide member (42) is the same as that of the first air guide member (41); the second air guide member (42) is connected to the gas concentration detector (46) and the first connector (481); 3) is fixedly mounted on the end of the second exhaust head (31), the second air guide member (42) is fixedly mounted on the end of the second air intake head (32) through a third valve (431), a second three-way pipe (410) is fixedly mounted between the second air guide hose (491) in the first air guide member (41) and the second air guide hose (491) in the second air guide member (42), the second three-way pipe (410) is fixedly clamped in the middle of the device top frame (12), and a second vacuum pump (411) is fixedly mounted on the top of the second three-way pipe (410).

4. A vacuum nitrogen protection device according to claim 3, characterized in that: The gas purification component (45) comprises a purification outer cylinder (451), and connecting pipes (452) are fixedly installed at both ends of the purification outer cylinder (451), and the ends of the two connecting pipes (452) are respectively fixedly installed with the ends of the second valve (43) and the gas concentration detector (46), and a purification inner tube (453) is movablely provided in the purification outer cylinder (451), and a gas purification core (454) is fixedly provided in the purification inner tube (453).

5. A vacuum nitrogen protection device according to claim 3, characterized in that: A nitrogen generating device (6) is fixedly mounted in the middle of the top of the device base (1); a gas delivery pipeline (61) is fixedly mounted at the output port of the nitrogen generating device (6); and an end of the gas delivery pipeline (61) is fixedly mounted to the top of the second vacuum pump (411).

6. A vacuum nitrogen protection device according to claim 1, characterized in that: The support mechanism (5) comprises a support base (51), a sealing card frame (511) is integrally formed at the middle of the top end of the support base (51), the sealing card frame (511) is movably clamped on the bottom of the corresponding first nitrogen protection frame (2) and the second nitrogen protection frame (3), a sealing gasket (512) is provided on the upper surface of the support base (51), the upper surface of the sealing gasket (512) is in contact with the lower surface of the corresponding first nitrogen protection frame (2) and the second nitrogen protection frame (3), and the support base (51) is provided with a sealing gasket (512). A bearing (52) is provided on the middle fixed card, a rotating shaft (521) is provided on the middle fixed card of the bearing (52), a storage platform (53) is fixedly installed on the top of the rotating shaft (521), a driven gear ring (522) is fixedly installed on the bottom of the rotating shaft (521), a driving gear (524) is meshedly connected on the outer side of the driven gear ring (522), a driving shaft (523) is fixedly installed on the middle of the driving gear (524), and the driving shaft (523) is rotatably installed on the bottom end of the support base (51).

7. A vacuum nitrogen protection device according to claim 6, characterized in that: A first cover (54) is fixedly mounted on the bottom end of the support base (51), a drive motor (55) is fixedly mounted on the bottom end of the first cover (54), and a drive end of the drive motor (55) and a bottom end of the drive shaft (523) are fixedly mounted.

8. A vacuum nitrogen protection device according to claim 7, characterized in that: A second cover (56) is fixedly mounted on the bottom end of the first cover (54), the drive motor (55) is located in the second cover (56), and the support mechanism (5) is fixedly mounted on the drive end of the first linear electric rail (14) through the second cover (56).

9. A vacuum nitrogen protection device according to claim 1, characterized in that: The welding assembly (8) comprises two second linear electric rails (81), and the welding assembly (8) is respectively fixedly mounted on the inner side of the first nitrogen protection frame (2) and the second nitrogen protection frame (3) through the second linear electric rails (81); the driving ends of the two second linear electric rails (81) are fixedly mounted with a third linear electric rail (82); the driving end of the third linear electric rail (82) is fixedly mounted with a cylinder bracket (83); an electric lifting rod (84) is fixedly mounted on the cylinder bracket (83); the driving end of the electric lifting rod (84) is fixedly mounted with a rotating cylinder (85); the driving end of the rotating cylinder (85) is fixedly mounted with a mounting bracket (86); and the end of the mounting bracket (86) is fixedly mounted with a welding end (87).

10. A vacuum nitrogen protection device according to claim 1, characterized in that: Observation windows (201) are fixedly mounted on the side ends of the first nitrogen protection frame (2) and the second nitrogen protection frame (3).

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