Preparation device and preparation method of efficient welding shielding gas

Abstract

The invention discloses a preparation device and method for efficient welding shielding gas. The preparation device comprises a top box, a first gas inlet pipe and a second gas inlet pipe. A sealing box is arranged on one side of the bottom of the top box, and a mixing box is arranged at the bottom of the top box; the first air inlet pipe is arranged on one side of the top of the sealing box, and a filter screen frame is arranged on one side of the first air inlet pipe; according to the invention, the pulling plate can drive the inserting block to be separated into the inserting block in the positioning block, the fixing of the inserting block is relieved, and the inserting block on the side edge of the filter screen frame can be separated into the positioning block by pulling the filter screen frame outwards, so that the filter screen body in the filter screen frame can be conveniently disassembled, cleaned or replaced subsequently; the argon in the inner cavity of the sealing box is continuously mixed through the mixing box and the stirring blades, the mixing speed is high, the mixing effect is good, when gas preparation is completed, the gas pump is started to convey the mixed gas into the collecting box from the interior of the concave pipe, and collection is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of welding shielding gas preparation, and in particular relates to a preparation device and a preparation method of high-efficiency welding shielding gas. Background Art

[0002] The material used to produce welding shielding gas is an environmentally friendly, non-toxic product, and its promotion plays a positive role in effectively protecting process products. With the continuous development of this product, the welding shielding gas industry will usher in a new pattern; at present, carbon dioxide gas shielded welding is widely used in shipbuilding, engineering machinery manufacturing, metal structure welding and other fields, and carbon dioxide gas shielded welding machines must use carbon dioxide gas for shielded welding, which has the advantages of good welding performance, small spatter, and good dynamic characteristics. At present, carbon dioxide gas shielded welding must be equipped with a bottle of carbon dioxide gas cylinder during welding, which is extremely inconvenient to move welding, and the gas volume of carbon dioxide gas cylinders is limited. A welding machine must be replaced with a bottle of carbon dioxide gas cylinder after working for 8-12 hours, and most companies do not have the preparation capacity, and go to the manufacturer to purchase and transport, which directly affects the welding production speed and efficiency. The development of welding shielding gas preparation equipment has greatly facilitated the welding production of enterprises, and at the same time created work efficiency and economic benefits for enterprises.

[0003] In the related technology, a solution of a welding shielding gas preparation device (announcement number: CN202894553U) was found after searching. When used, it has a simple structure and a reasonable design, which improves production speed and work efficiency. When using this utility model for welding, the welding shielding gas device is directly connected to the welding machine through an air pipe. In this way, the welding operator can work at a long distance, saving time and effort, and the operation is convenient and quick.

[0004] However, in the process of preparing the gas, it is necessary to mix and proportion multiple gases. However, the gas mixing and proportioning device often lacks a filtering device, and is unable to further filter and clean the mixed gas, so that impurities are present in the gas, which easily affects the subsequent use of the gas. At the same time, the existing filter will be fixedly installed inside the intake pipe to filter the gas, and the filter will become clogged after a long period of filtration, and the fixed filter cannot be disassembled and cleaned, resulting in the subsequent clogged filter being unable to filter the gas, which is inconvenient to use.

[0005] To this end, we propose a preparation device and method for efficient welding shielding gas to solve the problems mentioned in the above background technology. Summary of the invention

[0006] The purpose of the present invention is to provide a device and method for preparing a high-efficiency welding shielding gas, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a device for preparing high-efficiency welding shielding gas, comprising: a top box, a first air inlet pipe and a second air inlet pipe;

[0008] A sealing box is arranged at one side of the bottom of the top box, and the sealing box and the top box are fixedly arranged therebetween; a mixing box is arranged at the bottom of the top box, and the mixing box and the top box are fixedly arranged therebetween;

[0009] The first air inlet pipe is arranged on one side of the top of the sealing box, and a sealing arrangement is provided between the first air inlet pipe and the sealing box to avoid leakage. A filter screen frame is arranged on one side of the first air inlet pipe, and a filter screen body is arranged inside the filter screen frame. The filter screen body is detachably connected to the inside of the filter screen frame. A connecting pipe is arranged between the sealing box and the mixing box.

[0010] The second air inlet pipe is arranged on one side of the mixing box, and a valve A is arranged on the surface of the second air inlet pipe, and the valve A is arranged to control the opening and closing of the second air inlet pipe;

[0011] The surface of the first air inlet pipe is provided with a disassembly mechanism, and the moving block and the plug-in block are driven upward by the pull plate of the disassembly mechanism to make the plug-in block detach from the inside of the plug-in block on the side of the filter frame and release the fixation.

[0012] The disassembly mechanism includes a positioning block connected to the surface of the first air inlet pipe, the positioning block and the first air inlet pipe are fixedly arranged, the plug block is connected to the side of the filter screen frame, the plug block and the filter screen frame are fixedly arranged, and the plug block is inserted into the interior of the positioning block, the top of the positioning block is connected to a connecting frame, the connecting frame and the positioning block are fixedly arranged, the number of the connecting frames is two groups, the interiors of the two groups of connecting frames are respectively connected with springs, the pull plate is connected to the top of the connecting frame, the plug block is connected to the bottom of the pull plate, the plug block and the pull plate are fixedly arranged, the moving block is connected to the surface of the plug block, the moving block is slidably connected to the interior of the connecting frame, and is located at the bottom of the spring, the surface of the first air inlet pipe is connected to valve B, valve B is used to control the opening and closing of the first air inlet pipe.

[0013] A motor is connected to the top of the top box, and the motor is connected to the top of the top box by bolts. A rotating shaft is connected to the output end of the motor. The bottom of the rotating shaft passes through the top box and extends to the inside of the mixing box. Stirring blades are connected to the surface of the rotating shaft at equal intervals, and the stirring blades are fixed to the rotating shaft. A driving gear is connected to the surface of the rotating shaft located inside the top box, and the driving gear is fixed to the rotating shaft.

[0014] A driving mechanism is provided on the surface of the driving gear, and a chain of the driving mechanism drives the driven gear, the threaded rod and the movable plate to move upward, so that the movable plate transports the gas to the inside of the mixing box through the connecting pipe.

[0015] The threaded rod is connected to the inside of the sealed box, and the top of the threaded rod extends to the inside of the top box. The driven gear is connected to the surface of the threaded rod, and the driven gear and the threaded rod are fixedly arranged. The chain is meshed with the driven gear and the driving gear. The movable plate is screwed to the surface of the threaded rod. Sealing rings are respectively connected to both sides of the movable plate, and the sealing rings are in contact with the inner wall of the sealed box. The setting of the sealing ring can seal the gas to prevent the gas from running to the bottom of the movable plate.

[0016] An internal threaded portion is connected to the inner side of the movable plate, and the internal threaded portion is threadedly connected to the threaded rod. The internal threaded portion and the movable plate are integrally formed, and the external thread on the surface of the threaded rod is matched and screwed with the internal threaded portion inside the movable plate to drive the movable plate to rise or fall.

[0017] The side of the mixing box is connected to a collecting box, a concave tube is connected between the collecting box and the mixing box, and an air pump is connected to the surface of the concave tube. When the air pump is turned on, the mixed gas is transported from the inside of the concave tube to the inside of the collecting box for easy collection.

[0018] The side of the top box is connected with an inverted L-shaped support rod, and the inverted L-shaped support rod and the top box are fixedly arranged.

[0019] The inner side wall of the sealing box is connected with limiting blocks, the number of the limiting blocks is two groups, and the two groups of limiting blocks are fixedly arranged with the inner side wall of the sealing box.

[0020] The present invention also provides a method for preparing a high-efficiency welding shielding gas preparation device, which specifically comprises the following steps:

[0021] S1. Open valve A, align the external carbon dioxide pipeline with the second air inlet pipe, and let the carbon dioxide enter the mixing box through the second air inlet pipe to form a collection;

[0022] S2, aligning the argon gas pipeline with the surface of the first air inlet pipe, and then delivering the argon gas, filtering the argon gas through the filter body inside the filter frame, making the argon gas clean, and gradually letting the argon gas enter the inside of the sealed box, so that the sealed box collects the filtered argon gas;

[0023] S3. Start the motor, and let the output end of the motor drive the rotating shaft and the driving gear to rotate. Since the driving gear is meshed with the chain, the chain will drive the driven gear and the threaded rod to rotate. Since the external thread on the surface of the threaded rod is matched and screwed with the internal thread inside the movable plate, the movable plate can be driven to move up. After the movable plate moves up, it will push the filtered argon gas upward, allowing the argon gas to enter the interior of the mixing box through the connecting pipe, so that the argon gas is mixed with carbon dioxide;

[0024] S4. As the shaft rotates, it drives the stirring blades to stir the argon and carbon dioxide inside the mixing box to form a mixture, thereby processing them into the required welding shielding gas.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the preparation device and preparation method of high-efficiency welding shielding gas provided by the present invention, the present invention drives the plug-in block to move upward by the pull plate, which will drive the moving block to move upward inside the connection frame, and the moving block will squeeze the spring inside the connection frame, and the pull plate will drive the plug-in block to separate from the plug-in block inside the positioning block, thereby releasing the fixation of the plug-in block, and then releasing the fixation of the filter frame, and pulling the filter frame outward can make the plug-in block on the side of the filter frame separate from the inside of the positioning block, so as to facilitate the subsequent disassembly, cleaning or replacement of the filter body inside the filter frame, and then facilitate the subsequent use;

[0026] By adjusting the forward and reverse rotation of the motor, the movable plate can be moved up and down between the two limit blocks. The argon gas in the inner cavity of the sealed box is continuously mixed through the mixing box and the stirring blades. The mixing rate is fast and the mixing effect is good. When the gas preparation is completed, the air pump is turned on to transport the mixed gas from the inside of the concave tube to the inside of the collection box for easy collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention in cross section;

[0028] Figure 2 It is a schematic structural diagram of a front cross-section of the first air intake pipe of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the connection frame and the plug-in block of the present invention when they are connected;

[0030] Figure 4 It is a schematic structural diagram of a side section of the movable plate of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the driving gear, the driven gear and the chain when they are connected in the present invention.

[0032] In the figure: 1. top box; 2. motor; 3. inverted L-shaped support rod; 4. sealing box; 5. movable plate; 6. threaded rod; 7. first air inlet pipe; 8. limit block; 9. mixing box; 10. rotating shaft; 11. concave pipe; 12. air pump; 13. collecting box; 14. second air inlet pipe; 15. valve A; 16. stirring blade; 17. connecting pipe; 18. valve B; 19. positioning block; 20. filter frame; 21. filter body; 22. plug-in block; 23. connecting frame; 24. pull plate; 25. spring; 26. moving block; 27. plug-in block; 28. sealing ring; 29. ​​internal threaded part; 30. driving gear; 31. driven gear; 32. chain. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the 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] Example 1

[0035] The present invention provides Figure 1-5 The device for preparing high-efficiency welding shielding gas comprises: a top box 1, a sealing box 4 is arranged on one side of the bottom of the top box 1, and a mixing box 9 is arranged on the bottom of the top box 1;

[0036] A first air inlet pipe 7, which is arranged at one side of the top of the sealing box 4, a filter screen frame 20 is arranged at one side of the first air inlet pipe 7, a filter screen body 21 is arranged inside the filter screen frame 20, and a connecting pipe 17 is arranged between the sealing box 4 and the mixing box 9;

[0037] A second air inlet pipe 14, which is disposed on one side of the mixing box 9, and a valve A15 is disposed on the surface of the second air inlet pipe 14;

[0038] The surface of the first air inlet pipe 7 is provided with a disassembly mechanism, and the pull plate 24 of the disassembly mechanism drives the moving block 26 and the plug-in block 27 to move upward, so that the plug-in block 27 is separated from the inside of the plug-in block 22 on the side of the filter frame 20 and released.

[0039] The disassembly mechanism includes a positioning block 19 connected to the surface of the first air inlet pipe 7, the positioning block 19 and the first air inlet pipe 7 are fixedly arranged, the plug block 22 is connected to the side of the filter frame 20, the plug block 22 and the filter frame 20 are fixedly arranged, and the plug block 22 is inserted into the interior of the positioning block 19, the top of the positioning block 19 is connected with a connecting frame 23, the connecting frame 23 and the positioning block 19 are fixedly arranged, the number of the connecting frames 23 is two groups, the interiors of the two groups of connecting frames 23 are respectively connected with springs 25, the pull plate 24 is connected to the top of the connecting frame 23, the plug block 27 is connected to the bottom of the pull plate 24, the plug block 27 and the pull plate 24 are fixedly arranged, the moving block 26 is connected to the surface of the plug block 27, the moving block 26 is slidably connected to the interior of the connecting frame 23, and is located at the bottom of the spring 25, and the surface of the first air inlet pipe 7 is connected with a valve B18, and the valve B18 is used to control the opening and closing of the first air inlet pipe 7.

[0040] The top of the top box 1 is connected to a motor 2, which is bolted to the top of the top box 1. The output end of the motor 2 is connected to a rotating shaft 10. The bottom of the rotating shaft 10 passes through the top box 1 and extends to the inside of the mixing box 9. The surface of the rotating shaft 10 is connected to stirring blades 16 at equal intervals, and the stirring blades 16 are fixedly arranged with the rotating shaft 10. The surface of the rotating shaft 10 is located inside the top box 1 and is connected to a driving gear 30, and the driving gear 30 is fixedly arranged with the rotating shaft 10.

[0041] A driving mechanism is provided on the surface of the driving gear 30 , and the chain 32 of the driving mechanism drives the driven gear 31 , the threaded rod 6 and the movable plate 5 to move upward, so that the movable plate 5 transports the gas to the inside of the mixing box 9 through the connecting pipe 17 .

[0042] The threaded rod 6 is connected to the inside of the sealed box 4, and the top of the threaded rod 6 extends to the inside of the top box 1. The driven gear 31 is connected to the surface of the threaded rod 6, and the driven gear 31 and the threaded rod 6 are fixedly arranged. The chain 32 is meshed with the driven gear 31 and the driving gear 30. The movable plate 5 is screwed to the surface of the threaded rod 6. The two sides of the movable plate 5 are respectively connected with sealing rings 28, and the sealing rings 28 are in contact with the inner wall of the sealed box 4. The setting of the sealing ring 28 can seal the gas to prevent the gas from running to the bottom of the movable plate 5.

[0043] An internal threaded portion 29 is connected to the inner side of the movable plate 5, and the internal threaded portion 29 is threadedly connected to the threaded rod 6. The internal threaded portion 29 and the movable plate 5 are integrally formed, and the external thread on the surface of the threaded rod 6 is matched and screwed with the internal threaded portion 29 inside the movable plate 5 to drive the movable plate 5 to rise or fall.

[0044] The side of the mixing box 9 is connected to a collecting box 13, a concave tube 11 is connected between the collecting box 13 and the mixing box 9, and an air pump 12 is connected to the surface of the concave tube 11. When the air pump 12 is turned on, the mixed gas is transported from the inside of the concave tube 11 to the inside of the collecting box 13 for easy collection.

[0045] An inverted L-shaped support rod 3 is connected to the side of the top box 1, and the inverted L-shaped support rod 3 and the top box 1 are fixedly arranged.

[0046] The inner side wall of the sealing box 4 is connected with a limiting block 8 , and the limiting blocks 8 are in two groups. The two groups of limiting blocks 8 are fixedly arranged to the inner side wall of the sealing box 4 .

[0047] The present invention also provides a method for preparing a high-efficiency welding shielding gas preparation device, which specifically comprises the following steps:

[0048] S1, open valve A15, align the external carbon dioxide pipeline with the second air inlet pipe 14, and let the carbon dioxide enter the interior of the mixing box 9 through the second air inlet pipe 14 to form a collection;

[0049] S2, align the argon gas pipeline with the surface of the first air inlet pipe 7, and then deliver the argon gas, filter the argon gas through the filter body 21 inside the filter frame 20, make the argon gas clean, let the argon gas gradually enter the inside of the sealing box 4, and let the sealing box 4 collect the filtered argon gas;

[0050] S3, start the motor 2, and let the output end of the motor 2 drive the rotating shaft 10 and the driving gear 30 to rotate. Since the driving gear 30 is meshed with the chain 32, the chain 32 will drive the driven gear 31 and the threaded rod 6 to rotate. Since the external thread on the surface of the threaded rod 6 is matched and screwed with the internal thread part 29 inside the movable plate 5, the movable plate 5 can be driven to move upward. After the movable plate 5 moves upward, it will push the filtered argon gas upward, allowing the argon gas to enter the interior of the mixing box 9 through the connecting pipe 17, so that the argon gas is mixed with the carbon dioxide;

[0051] S4. When the rotating shaft 10 rotates, the rotating shaft 10 drives the stirring blades 16 to stir the argon gas and carbon dioxide in the mixing box 9 to form a mixture, thereby processing them into the required welding shielding gas.

[0052] In summary, compared with the prior art, the present invention pulls the pull plate 24 to allow the pull plate 24 to drive the plug-in block 27 to move upward. When the plug-in block 27 moves upward, it will drive the moving block 26 to move upward inside the connecting frame 23, and the moving block 26 will squeeze the spring 25 inside the connecting frame 23 to compress the spring 25, and the pull plate 24 will drive the plug-in block 27 to disengage from the plug-in block 22 inside the positioning block 19, thereby releasing the fixation of the plug-in block 22, and then the fixation of the filter frame 20 can be released, and the filter frame 20 can be pulled outward to allow the plug-in block 22 on the side of the filter frame 20 to disengage from the inside of the positioning block 19, so as to facilitate the subsequent disassembly, cleaning or replacement of the filter body 21 inside the filter frame 20, and then facilitate the subsequent use;

[0053] When the motor 2 rotates forward and reverse, the argon gas in the middle of the inner cavity of the sealing box 4 is sucked into the mixing box 9 for stirring and mixing again. The forward and reverse rotation of the motor 2 is adjusted to make the movable plate 5 move back and forth up and down between the two limit blocks 8. The argon gas in the inner cavity of the sealing box 4 is continuously mixed through the mixing box 9 and the stirring blades 16. The mixing rate is fast and the mixing effect is good. When the gas preparation is completed, the air pump 12 is turned on to transport the mixed gas from the inside of the concave tube 11 to the inside of the collecting box 13 for easy collection.

[0054] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preparing high-efficiency welding shielding gas, characterized in that: include: A top box (1), wherein a sealing box (4) is arranged on one side of the bottom of the top box (1), and a mixing box (9) is arranged at the bottom of the top box (1); A first air inlet pipe (7), the first air inlet pipe (7) being arranged on one side of the top of the sealing box (4), a filter screen frame (20) being arranged on one side of the first air inlet pipe (7), a filter screen body (21) being arranged inside the filter screen frame (20), and a connecting pipe (17) being arranged between the sealing box (4) and the mixing box (9); A second air inlet pipe (14), the second air inlet pipe (14) being arranged on one side of the mixing box (9), and a valve A (15) being arranged on the surface of the second air inlet pipe (14); A disassembly mechanism is provided on the surface of the first air inlet pipe (7), and a pull plate (24) of the disassembly mechanism drives the moving block (26) and the plug-in block (27) to move upward, so that the plug-in block (27) is separated from the inside of the plug-in block (22) on the side of the filter frame (20) and released from fixation.

2. The device for preparing a high-efficiency welding shielding gas according to claim 1, characterized in that: The disassembly mechanism comprises a positioning block (19) connected to the surface of the first air inlet pipe (7), the plug block (22) is connected to the side of the filter frame (20), and the plug block (22) is inserted into the interior of the positioning block (19), the top of the positioning block (19) is connected to a connecting frame (23), the number of the connecting frames (23) is two groups, and the interiors of the two groups of connecting frames (23) are respectively connected to springs (25), the pull plate (24) is connected to the top of the connecting frame (23), the plug block (27) is connected to the bottom of the pull plate (24), the moving block (26) is connected to the surface of the plug block (27), the moving block (26) is slidably connected to the interior of the connecting frame (23) and is located at the bottom of the spring (25), and the surface of the first air inlet pipe (7) is connected to a valve B (18).

3. The device for preparing a high-efficiency welding shielding gas according to claim 1, characterized in that: The top of the top box (1) is connected to a motor (2), the output end of the motor (2) is connected to a rotating shaft (10), the bottom of the rotating shaft (10) passes through the top box (1) and extends to the inside of the mixing box (9), the surface of the rotating shaft (10) is connected to stirring blades (16) at equal intervals, and the surface of the rotating shaft (10) located inside the top box (1) is connected to a driving gear (30).

4. The device for preparing a high-efficiency welding shielding gas according to claim 3, characterized in that: A driving mechanism is provided on the surface of the driving gear (30), and a chain (32) of the driving mechanism drives the driven gear (31), the threaded rod (6) and the movable plate (5) to move upward, so that the movable plate (5) transports the gas to the interior of the mixing box (9) through the connecting pipe (17).

5. The device for preparing high-efficiency welding shielding gas according to claim 4, characterized in that: The threaded rod (6) is connected to the inside of the sealing box (4), and the top of the threaded rod (6) extends to the inside of the top box (1); the driven gear (31) is connected to the surface of the threaded rod (6); the chain (32) is meshed with the driven gear (31) and the driving gear (30); the movable plate (5) is screwed to the surface of the threaded rod (6); sealing rings (28) are respectively connected to both sides of the movable plate (5), and the sealing rings (28) are in contact with the inner wall of the sealing box (4).

6. The device for preparing high-efficiency welding shielding gas according to claim 5, characterized in that: An internal threaded portion (29) is connected to the inner side of the movable plate (5), and the internal threaded portion (29) is threadedly connected to the threaded rod (6).

7. The device for preparing high-efficiency welding shielding gas according to claim 1, characterized in that: The side of the mixing box (9) is connected to a collecting box (13), a concave tube (11) is connected between the collecting box (13) and the mixing box (9), and an air pump (12) is connected to the surface of the concave tube (11).

8. The device for preparing high-efficiency welding shielding gas according to claim 1, characterized in that: An inverted L-shaped support rod (3) is connected to the side of the top box (1).

9. The device for preparing a high-efficiency welding shielding gas according to claim 5, characterized in that: The inner side wall of the sealing box (4) is connected to a limiting block (8).

10. A method for preparing a high-efficiency welding shielding gas according to any one of claims 1 to 9, characterized in that: The specific steps include: S1, open valve A (15), align the external carbon dioxide pipeline with the second air inlet pipe (14), and let the carbon dioxide enter the interior of the mixing box (9) through the second air inlet pipe (14) to form a collection; S2, aligning the argon gas pipeline with the surface of the first air inlet pipe (7), and then delivering the argon gas, filtering the argon gas through the filter screen body (21) inside the filter screen frame (20), making the argon gas clean, and gradually allowing the argon gas to enter the interior of the sealing box (4), so that the sealed box (4) collects the filtered argon gas; S3, starting the motor (2), allowing the output end of the motor (2) to drive the rotating shaft (10) and the driving gear (30) to rotate, and since the driving gear (30) is meshed with the chain (32), the chain (32) will drive the driven gear (31) and the threaded rod (6) to rotate, and since the external thread on the surface of the threaded rod (6) is matched and screwed with the internal thread (29) inside the movable plate (5), the movable plate (5) can be driven to move upward, and after the movable plate (5) moves upward, it will push the filtered argon gas upward, allowing the argon gas to enter the interior of the mixing box (9) through the connecting pipe (17), so that the argon gas is mixed with the carbon dioxide; S4. When the rotating shaft (10) rotates, the rotating shaft (10) drives the stirring blade (16) to stir the argon gas and carbon dioxide inside the mixing box (9) to form a mixture, thereby processing them into the required welding shielding gas.

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