Leakage-proof recovery device for direct filling of mixed gas of argon and carbon dioxide
By installing a filling protection component and a gas detector at the joints of the argon and carbon dioxide mixed gas filling device, the problem of gas leakage during the filling process is solved, and efficient recovery of gas resources and safe continuity of the filling process is achieved.
Patent Information
- Application Number
- CN202510413343.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2025-05-30
AI Technical Summary
During the filling process of argon and carbon dioxide mixed gas, due to gas source pressure fluctuations, equipment vibration or artificial operation factors, the inflation pipeline is prone to radial swing or axial displacement, resulting in a gap between the seal ring and the pipe wall, which in turn causes gas leakage. Especially under high-pressure filling conditions, local air leakage at the connection will cause waste of gas resources and affect inflation safety.
A direct-filling leakage prevention recovery device for a mixed gas of argon and carbon dioxide is designed. The filling protection component is installed at the connection between the inlet joint of the inlet pipe and the inflatable rotary joint of the inflatable connecting pipe, forming a sealed sleeve structure and equipped with a gas detector to detect leaked gas. When leakage is detected, the leaked gas is recovered to the storage tank through the gas recovery pipe to avoid waste of resources.
It effectively prevents leakage of argon-carbon dioxide mixed gas during the filling process, avoids the waste of gas resources, and ensures the continuity and safety of the filling process.
Smart Images
Figure CN120062536A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of pipeline interface leakage prevention, and specifically relates to a leakage prevention and recovery device for direct filling of argon and carbon dioxide mixed gas. Background Art
[0002] As an important combination of industrial shielding gases, the argon and carbon dioxide mixed gas has extensive applications in fields such as metal welding and gas metal arc welding. Among them, argon can effectively isolate the molten pool from contact with air by virtue of its inert characteristics, preventing the oxidation of metals and the generation of nitride inclusions; while the addition of carbon dioxide adjusts the surface tension of the molten pool through metallurgical reactions, improves the weld forming quality and enhances the arc stability. The synergistic effect of the two makes the argon-carbon dioxide mixed gas show unique advantages in processes such as thin plate welding and high-speed welding, and becomes an important process medium in modern welding technology.
[0003] In the filling process of the argon-carbon dioxide mixed gas, the existing technology usually adopts a pipeline connection method to mix the two gases in a preset ratio and then transport them to the storage tank. To ensure the connection tightness, the conventional method is to install a sealing ring made of rubber or fluororubber at the intake interface, and form a static sealing structure through flange or thread fastening. However, during the actual filling process, due to factors such as gas source pressure fluctuations, equipment vibrations or human operation, the filling pipeline is prone to radial swing or axial displacement. Such dynamic loads will cause gaps between the sealing ring and the pipe wall, thereby leading to gas leakage. Especially under high-pressure filling conditions, local air leakage at the connection will cause waste of gas resources and affect the filling safety. Summary of the Invention
[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a leakage prevention and recovery device for direct filling of argon and carbon dioxide mixed gas to solve the problems raised in the above background art.
[0005] According to one aspect of the present application, a leak-proof recovery device for direct filling of argon and carbon dioxide mixed gas includes a support base, a mixed gas storage tank, a recovery storage tank, an inlet pipe, a filling connection pipe, and a filling protection component. The support base is fixedly installed with a mixed gas storage tank and a recovery storage tank. An inlet pipe is arranged outside the mixed gas storage tank, and the inlet pipe is connected to the mixed gas storage tank in a communicating manner. An inlet joint is fixedly connected to the inlet port of the inlet pipe. A filling rotary joint is movably connected to the output port of the filling connection pipe. The outer side wall of the inlet joint is provided with an external thread, and the inner side wall of the filling rotary joint is provided with an internal thread. The filling connection pipe and the inlet pipe are fixedly connected in a communicating manner through the threaded connection of the filling rotary joint and the inlet joint. A filling protection component is sleeved at the outer peripheral side position of the connection between the filling rotary joint and the inlet joint. The filling protection component is of a sealed cavity structure, and the axial two ends of the filling protection component are respectively fixedly and hermetically connected to the inlet pipe and the filling connection pipe. The internal cavity of the filling protection component is connected to the recovery storage tank through a gas recovery pipe;
[0006] The filling protection component includes a first protection cover, a second protection cover, and a gas detector. Both the first protection cover and the second protection cover are semi-cylindrical thin-wall structures, and connecting convex plates are respectively arranged on the radial two sides of both of them and extend outward. A plurality of through holes are formed in the connecting convex plates along their lengths. The first protection cover and the second protection cover can be fixedly and hermetically connected by bolts passing through the plurality of through holes to connect their connecting convex plates to form a sealed sleeve structure. First semi-circular flange plates are respectively fixedly arranged at the axial two ends of the first protection cover, and second semi-circular flange plates are respectively fixedly arranged at the axial two ends of the second protection cover. The first semi-circular flange plate and the second semi-circular flange plate at the same end on the first protection cover and the second protection cover can be connected into a complete circular flange plate. A first fixed flange plate is fixedly arranged at a position close to the inlet port of the inlet pipe, and a second fixed flange plate is fixedly arranged at a position close to the output port of the filling connection pipe. After the first protection cover and the second protection cover are fixedly connected, the complete circular flange plate formed by the first semi-circular flange plate and the second semi-circular flange plate at one end is fixedly and hermetically connected to the first fixed flange plate, and the complete circular flange plate formed by the first semi-circular flange plate and the second semi-circular flange plate at the other end is fixedly and hermetically connected to the second fixed flange plate. The middle side wall of the first protection cover and the second protection cover protrudes outward along the circumference to form an extended cavity inside. The connection between the filling rotary joint and the inlet joint is located in the extended cavity. One end of the first protection cover is connected to the gas recovery pipe in a communicating manner, and a gas detector is installed on the first protection cover. The gas detector is used to detect the argon-carbon dioxide mixed gas leaked during filling in the extended cavity.
[0007] Preferably, first strip-shaped sealant strips are embedded along the axial direction on the butt joints on both radial sides of the first protective cover, and second strip-shaped sealant strips are embedded along the axial direction on the butt joints on both radial sides of the second protective cover. The installation positions of the first strip-shaped sealant strips and the second strip-shaped sealant strips on the same side correspond to each other. When the first protective cover and the second protective cover are fixedly and sealingly connected, the corresponding first strip-shaped sealant strips and the second strip-shaped sealant strips on the same side are in sealing contact by extrusion.
[0008] Preferably, first arc-shaped sealant strips are embedded on the butt joints of the first semi-circular flange plates at both axial ends of the first protective cover, and second arc-shaped sealant strips are embedded on the butt joints of the second semi-circular flange plates at both axial ends of the second protective cover. The first arc-shaped sealant strips and the second arc-shaped sealant strips at the same end can be spliced into a complete circular sealant strip. A first annular sealant strip is embedded on the butt joint surface of the first fixed flange plate, and a second annular sealant strip is embedded on the butt joint surface of the second fixed flange plate. When the axial ends of the filling protection assembly are respectively fixedly connected to the first fixed flange plate and the second fixed flange plate, the first annular sealant strip and the second annular sealant strip are respectively in sealing contact by extrusion with the complete circular sealant strip spliced by the first arc-shaped sealant strips and the second arc-shaped sealant strips at both axial ends of the filling protection assembly.
[0009] Preferably, sealing bumps are fixedly provided on the butt joint surfaces of the first fixed flange plate and the second fixed flange plate at the axial two ends of the filling protection assembly, and the outer side walls of the sealing bumps are in sealing contact with the inner side walls of the first protective cover and the second protective cover.
[0010] Preferably, an air extraction pump is fixedly installed on the recovery storage tank, an air outlet pipe is communicated and provided at the bottom of one side of the recovery storage tank, and an air outlet electromagnetic control valve is installed on the air outlet pipe.
[0011] Preferably, an air inlet electromagnetic control valve is installed on the gas recovery pipe.
[0012] Preferably, a bottom gas transmission pipe and a top gas transmission pipe are further arranged outside the mixed gas storage tank. The inlet pipe, the bottom gas transmission pipe and the top gas transmission pipe are connected in a communicating manner through a three-way pipe. The lower opening of the three-way pipe is connected to one end of the inlet pipe, and the left and right openings of the three-way pipe are respectively connected to one end of the top gas transmission pipe and one end of the bottom gas transmission pipe. The other end of the top gas transmission pipe extends upward and is communicated and connected to the top of the mixed gas storage tank, and the other end of the bottom gas transmission pipe extends downward and is communicated and connected to the bottom of the mixed gas storage tank. And stop valves are installed on the inlet pipe, the bottom gas transmission pipe and the top gas transmission pipe.
[0013] Preferably, the axial horizontal angle of the intake pipe at the intake joint is 30°-60°.
[0014] Preferably, a pressure gauge is also installed on the mixed gas storage tank.
[0015] Preferably, a through groove is provided through the side of the bracket base.
[0016] For a leak-proof recovery device for direct filling of argon-carbon dioxide mixed gas in this application, by sleeving a filling protection component at the connection between the intake joint of the intake pipe and the filling rotary joint of the filling connection pipe, when filling and connecting, first fix and connect the intake joint of the intake pipe and the filling rotary joint of the filling connection pipe through their internal and external threads, and then cover the first protection cover and the second protection cover of the filling protection component on the connection between the intake joint and the filling rotary joint and fixedly seal and connect the connecting convex plates of the two through bolts to form a sealed sleeve structure. And after the first protection cover and the second protection cover are fixedly connected, the integral circular flange formed by the first semi-circular flange and the second semi-circular flange at one axial end is fixedly and hermetically connected to the first fixed flange on the intake pipe, and the integral circular flange formed by the first semi-circular flange and the second semi-circular flange at the other axial end is fixedly and hermetically connected to the second fixed flange on the filling connection pipe. And the gas detector arranged on the outer side wall of the first protection cover can detect the leaked argon-carbon dioxide mixed gas in the cavity of the filling protection component, and then perform the mixed gas filling. During this process, when the gas detector detects the leaked argon-carbon dioxide mixed gas in the cavity of the filling protection component, the gas detector feeds back to the controller, and the controller will control to open the intake electromagnetic control valve on the gas recovery pipe, and at the same time open the air extraction pump on the recovery storage tank, so that the leaked argon-carbon dioxide mixed gas in the cavity of the filling protection component enters the recovery storage tank through the gas recovery pipe, avoiding the waste of argon-carbon dioxide mixed gas resources. And during this filling process, it is also not necessary to interrupt the mixed gas filling due to gas leakage at the connection, ensuring the progress of the gas filling work. In addition, the controller will also feedback the leakage signal fed back by the gas detector to the operator, which is convenient for the operator to process later. After the operator arrives at the site, the mixed gas in the recovery storage tank can be collected and recycled by opening the outlet electromagnetic control valve, avoiding the waste of mixed gas resources. Description of the Drawings
[0017] Figure 1 is a three-dimensional structure diagram of a leak-proof recovery device for direct filling of argon-carbon dioxide mixed gas according to an embodiment of this application.
[0018] Figure 2 is a side view structure diagram of a leak-proof recovery device for direct filling of argon-carbon dioxide mixed gas according to an embodiment of this application.
[0019] Figure 3 It is a perspective view of the disassembly of the first protective cover of a leak-proof recovery device for direct filling of a mixed gas of argon and carbon dioxide according to an embodiment of the present application.
[0020] Figure 4 It is a perspective view of the disassembly of the first protective cover and the gas filling connecting pipe of a leak-proof recovery device for direct filling of a mixed gas of argon and carbon dioxide according to an embodiment of the present application.
[0021] Figure 5 It is a perspective view of the disassembly of the filling protection assembly of a leak-proof recovery device for direct filling of a mixed gas of argon and carbon dioxide according to an embodiment of the present application.
[0022] Figure 6 It is another perspective view of the disassembly of the filling protection assembly of a leak-proof recovery device for direct filling of a mixed gas of argon and carbon dioxide according to an embodiment of the present application.
[0023] Figure 7 It is a transverse cross-sectional view of the filling protection assembly of a leak-proof recovery device for direct filling of a mixed gas of argon and carbon dioxide according to an embodiment of the present application.
[0024] Figure 8 It is a longitudinal cross-sectional view of the filling protection assembly of a leak-proof recovery device for direct filling of a mixed gas of argon and carbon dioxide according to an embodiment of the present application.
[0025] Reference numerals: 1, support base; 2, mixed gas storage tank; 3, recovery storage tank; 4, intake pipe; 5, gas filling connecting pipe; 6, intake joint; 7, gas filling rotary joint; 8, gas recovery pipe; 9, first protective cover; 10, second protective cover; 11, gas detector; 12, connecting convex plate; 13, first semi-circular flange; 14, second semi-circular flange; 15, first fixed flange; 16, second fixed flange; 17, first strip-shaped sealing rubber strip; 18, second strip-shaped sealing rubber strip; 19, first arc-shaped sealing rubber strip; 20, second arc-shaped sealing rubber strip; 21, first annular sealing rubber strip; 22, second annular sealing rubber strip; 23, sealing convex block; 24, air extraction pump; 25, outlet pipe; 26, outlet electromagnetic control valve; 27, intake electromagnetic control valve; 28, bottom gas transmission pipe; 29, top gas transmission pipe; 30, pressure gauge. Detailed implementation manners
[0026] In order to make the content of the present application easier to be clearly understood, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1In the directions herein, the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. Additionally, terms such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying relative importance.
[0027] As Figures 1 to 8 shown, a leak-proof recovery device for direct filling of argon and carbon dioxide mixed gas includes a support base 1, a mixed gas storage tank 2, a recovery storage tank 3, an inlet pipe 4, an inflation connection pipe 5, and a filling protection assembly. The support base 1 is fixedly installed with the mixed gas storage tank 2 and the recovery storage tank 3. A through groove is provided through the side of the support base 1, and this design facilitates the use of a forklift to insert into the through groove of the support base 1 to move the storage tanks. An inlet pipe 4, a bottom gas pipe 28, and a top gas pipe 29 are provided outside the mixed gas storage tank 2. The inlet pipe 4, the bottom gas pipe 28, and the top gas pipe 29 are connected through a tee pipe. The lower opening of the tee pipe is connected to one end of the inlet pipe 4, and the left and right openings of the tee pipe are respectively connected to one end of the top gas pipe 29 and one end of the bottom gas pipe 28. The other end of the top gas pipe 29 extends upward and is connected to the top of the mixed gas storage tank 2, and the other end of the bottom gas pipe 28 extends downward and is connected to the bottom of the mixed gas storage tank 2. And stop valves are installed on the inlet pipe 4, the bottom gas pipe 28, and the top gas pipe 29. A pressure gauge 30 is also installed on the mixed gas storage tank 2. Other pipelines and valve bodies (including output pipelines, connection pipelines, regulating valves, booster valves, etc., which are not shown in the figure because they are not necessary technical features of this application) are also provided on the argon-carbon dioxide mixed gas storage tank and the recovery storage tank 3; an inlet joint 6 is fixedly connected to the inlet port of the inlet pipe 4, and an inflation rotary joint 7 is movably connected to the output port of the inflation connection pipe 5. The outer wall of the inlet joint 6 is provided with an external thread, and the inner wall of the inflation rotary joint 7 is provided with an internal thread. The inflation connection pipe 5 and the inlet pipe 4 are fixedly connected through the threaded connection of the inflation rotary joint 7 and the inlet joint 6. Additionally, the horizontal included angle of the axis of the inlet pipe 4 at the position of the inlet joint 6 is 30° - 60°, and the horizontal included angle of the axis of the inlet pipe 4 at the position of the inlet joint 6 is 30° - 60°. This design makes the trend of the inflation connection pipe 5 smoother after it is connected to the inlet pipe 4, avoiding its excessive bending; a filling protection assembly is sleeved on the outer peripheral side at the connection position of the inflation rotary joint 7 and the inlet joint 6. The filling protection assembly is of a sealed cavity structure. The axial two ends of the filling protection assembly are respectively fixedly and hermetically connected to the inlet pipe 4 and the inflation connection pipe 5. The internal cavity of the filling protection assembly is connected to the recovery storage tank 3 through a gas recovery pipe 8. An inlet electromagnetic control valve 27 is installed on the gas recovery pipe 8. A suction pump 24 is fixedly installed on the recovery storage tank 3. An outlet pipe 25 is communicated with the bottom of one side of the recovery storage tank 3, and an outlet electromagnetic control valve 26 is installed on the outlet pipe 25.
[0028] In one embodiment, the filling protection assembly includes a first protective cover 9, a second protective cover 10, and a gas detector 11. Both the first protective cover 9 and the second protective cover 10 are semi-cylindrical thin-walled structures, and connecting convex plates 12 are provided extending outward on both radial sides thereof. A plurality of through holes are formed in the connecting convex plates 12 along their length directions. The first protective cover 9 and the second protective cover 10 can be fixedly and sealingly connected by bolts passing through the plurality of through holes to connect the connecting convex plates 12 of the two to form a sealed sleeve structure. Specifically, first strip-shaped sealing rubber strips 17 are embedded along the axial direction on the docking surfaces on both radial sides of the first protective cover 9, and second strip-shaped sealing rubber strips 18 are embedded along the axial direction on the docking surfaces on both radial sides of the second protective cover 10. The installation positions of the first strip-shaped sealing rubber strips 17 and the second strip-shaped sealing rubber strips 18 on the same side correspond to each other. When the first protective cover 9 and the second protective cover 10 are fixedly and sealingly connected, the first strip-shaped sealing rubber strips 17 and the second strip-shaped sealing rubber strips 18 corresponding to each other on the same side are in sealing contact by extrusion. This design enables the first protective cover 9 and the second protective cover 10 to have good sealing performance after connection.
[0029] At both axial ends of the first protective cover 9, first semi-circular flanges 13 are fixedly provided. At both axial ends of the second protective cover 10, second semi-circular flanges 14 are fixedly provided. The first semi-circular flanges 13 and the second semi-circular flanges 14 at the same end on the first protective cover 9 and the second protective cover 10 can be connected into a complete circular flange. At a position close to its intake port on the intake pipe 4, a first fixed flange 15 is fixedly provided. At a position close to its output port on the inflation connecting pipe 5, a second fixed flange 16 is fixedly provided. After the first protective cover 9 and the second protective cover 10 are fixedly connected, the complete circular flange formed by the first semi-circular flange 13 and the second semi-circular flange 14 at one end is fixedly and sealingly connected to the first fixed flange 15, and the complete circular flange formed by the first semi-circular flange 13 and the second semi-circular flange 14 at the other end is fixedly and sealingly connected to the second fixed flange 16. Specifically, first arc-shaped sealing rubber strips 19 are embedded on the butting surfaces of the first semi-circular flanges 13 at both axial ends of the first protective cover 9. Second arc-shaped sealing rubber strips 20 are embedded on the butting surfaces of the second semi-circular flanges 14 at both axial ends of the second protective cover 10. The first arc-shaped sealing rubber strips 19 and the second arc-shaped sealing rubber strips 20 at the same end can be spliced into a complete circular ring-shaped sealing rubber strip. A first ring-shaped sealing rubber strip 21 is embedded on the butting surface of the first fixed flange 15. A second ring-shaped sealing rubber strip 22 is embedded on the butting surface of the second fixed flange 16. After the axial ends of the filling protection assembly are fixedly connected to the first fixed flange 15 and the second fixed flange 16 respectively, the first ring-shaped sealing rubber strip 21 and the second ring-shaped sealing rubber strip 22 are respectively in extrusion sealing contact with the complete circular ring-shaped sealing rubber strip spliced by the first arc-shaped sealing rubber strips 19 and the second arc-shaped sealing rubber strips 20 at the axial ends of the filling protection assembly. This design enables the complete circular flanges formed at both axial ends of the filling protection assembly to have good sealing performance after being connected to the first fixed flange 15 on the intake pipe 4 and the second fixed flange 16 on the inflation connecting pipe 5 respectively. In addition, sealing bumps 23 are fixedly provided on the butting surfaces of the first fixed flange 15 and the second fixed flange 16 at the axial end positions of the filling protection assembly. The outer side walls of the sealing bumps 23 are in sealing contact with the inner side walls of the first protective cover 9 and the second protective cover 10. This design can further enhance the sealing performance between the filling protection assembly and the first fixed flange 15 and the second fixed flange 16.
[0030] The middle side walls of the first protective cover 9 and the second protective cover 10 bulge outwards along their circumferences to form an expanded cavity inside, so as to be able to cover the inflation rotary joint 7 and the intake joint 6. The connection part of the inflation rotary joint 7 and the intake joint 6 is located inside the expanded cavity. One end of the first protective cover 9 is connected in communication with the gas recovery pipe 8. A gas detector 11 is installed on the first protective cover 9. The gas detector 11 is used to detect the argon-carbon dioxide mixed gas leaking during filling inside the expanded cavity.
[0031] Working principle: During the filling connection, first, the intake joint 6 of the intake pipe 4 is fixedly connected to the filling rotary joint 7 of the filling connection pipe 5 through the internal and external threads thereof. Then, the first protective cover 9 and the second protective cover 10 of the filling protection assembly are sleeved on the connection part of the intake joint 6 and the filling rotary joint 7, and the connecting lug plates 12 of the two are fixedly and sealedly connected by bolts to form a sealed sleeve structure. After the first protective cover 9 and the second protective cover 10 are fixedly connected, the integral circular flange formed by the first semi-circular flange plate 13 and the second semi-circular flange plate 14 at one axial end is fixedly and sealedly connected to the first fixed flange plate 15 on the intake pipe 4, and the integral circular flange formed by the first semi-circular flange plate 13 and the second semi-circular flange plate 14 at the other axial end is fixedly and sealedly connected to the second fixed flange plate 16 on the filling connection pipe 5. Moreover, the gas detector 11 provided on the outer side wall of the first protective cover 9 can detect the leaked argon-carbon dioxide mixed gas in the cavity of the filling protection assembly, and then the mixed gas filling is carried out. During this process, when the gas detector 11 detects the leaked argon-carbon dioxide mixed gas in the cavity of the filling protection assembly, the gas detector 11 feeds back to the controller, and the controller will control to open the intake electromagnetic control valve 27 on the gas recovery pipe 8, and at the same time open the air extraction pump 24 on the recovery storage tank 3, so that the leaked argon-carbon dioxide mixed gas in the cavity of the filling protection assembly enters the recovery storage tank 3 through the gas recovery pipe 8, avoiding the waste of argon-carbon dioxide mixed gas resources. And during this filling process, it is also not necessary to interrupt the mixed gas filling due to the gas leakage at the connection part, ensuring the progress of the gas filling work. In addition, the controller will also feed back the leakage signal fed back by the gas detector 11 to the operator, facilitating the subsequent processing by the operator. After the operator arrives at the scene, the mixed gas in the recovery storage tank 3 can be collected and recycled by opening the outlet electromagnetic control valve 26, avoiding the waste of mixed gas resources.
[0032] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and are not intended to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that without departing from the spirit and scope defined by the claims of the present application, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features.
Claims
1. A leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas, comprising a support base (1), a mixed gas storage tank (2), a recovery storage tank (3), an air inlet pipe (4), a charging connecting pipe (5) and a charging protection component, characterized in that: A mixed gas storage tank (2) and a recovery storage tank (3) are fixedly mounted on the support base (1); an air intake pipe (4) is arranged on the outside of the mixed gas storage tank (2); the air intake pipe (4) is in communication with the mixed gas storage tank (2); an air intake joint (6) is fixedly connected to the air intake port of the air intake pipe (4); an air charging rotary joint (7) is movably connected to the output port of the air charging connection pipe (5); an outer wall of the air intake joint (6) is provided with an external thread; an inner wall of the air charging rotary joint (7) is provided with an internal thread; and the air charging connection pipe (5) is provided with an outer wall of the air charging rotary joint (6) and an inner wall of the air charging rotary joint (7). The connecting pipe (5) is fixedly connected to the air intake pipe (4) through the threaded connection of the air charging rotary joint (7) and the air intake joint (6); a filling protection component is sleeved on the outer peripheral side of the connection between the air charging rotary joint (7) and the air intake joint (6); the filling protection component is a sealed cavity structure; the axial ends of the filling protection component are respectively fixedly sealed and connected to the air intake pipe (4) and the air charging connecting pipe (5); the internal cavity of the filling protection component is connected to the recovery storage tank (3) through a gas recovery pipe (8); The filling protection assembly comprises a first protection cover (9), a second protection cover (10) and a gas detector (11); the first protection cover (9) and the second protection cover (10) are both semi-cylindrical thin-wall structures and both radial sides thereof are provided with connecting convex plates (12) extending outwards; the connecting convex plates (12) are provided with a plurality of through holes along their length direction; the first protection cover (9) and the second protection cover (10) can be fixedly and sealedly connected to the connecting convex plates (12) of the two by bolts passing through the plurality of through holes to form a A sealing sleeve structure is provided, wherein first semicircular flanges (13) are fixedly provided at both axial end ports of the first protective cover (9), and second semicircular flanges (14) are fixedly provided at both axial end ports of the second protective cover (10), and the first semicircular flanges (13) and the second semicircular flanges (14) located at the same end of the first protective cover (9) and the second protective cover (10) can be connected to form a full-circular flange, and a first fixed flange (15) is fixedly provided on the intake pipe (4) near the intake port thereof. A second fixed flange (16) is fixedly provided on the inflation connection pipe (5) near its output port. After the first protective cover (9) and the second protective cover (10) are fixedly connected, the first semicircular flange (13) and the second semicircular flange (14) at one end thereof are fixedly sealed and connected to the first fixed flange (15). The first semicircular flange (13) and the second semicircular flange (14) at the other end thereof are fixedly sealed and connected to the second fixed flange (16). The first protective cover (9) and the second protective cover (10) are sealed and connected, and the middle side walls of the first protective cover (9) and the second protective cover (10) are convex outward along the circumference thereof to form an expansion cavity inside thereof, and the connection between the inflation rotary joint (7) and the air inlet joint (6) is located in the expansion cavity, and the first protective cover (9) is connected to one end of the gas recovery pipe (8), and a gas detector (11) is installed on the first protective cover (9), and the gas detector (11) is used to detect the argon-carbon dioxide mixed gas leaking during the filling in the expansion cavity.
2. The leak-proof recovery device for direct filling of argon and carbon dioxide mixed gas according to claim 1, characterized in that: A first strip of sealing rubber (17) is embedded in the axial direction on both radial side butt joint surfaces of the first protective cover (9), and a second strip of sealing rubber (18) is embedded in the axial direction on both radial side butt joint surfaces of the second protective cover (10). The first strip of sealing rubber (17) and the second strip of sealing rubber (18) on the same side are arranged in corresponding positions. When the first protective cover (9) and the second protective cover (10) are fixedly sealed and connected, the first strip of sealing rubber (17) and the second strip of sealing rubber (18) on the same side corresponding to each other are squeezed and sealed.
3. The leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas according to claim 2, characterized in that: A first arc-shaped sealing strip (19) is embedded in the butt joint surface of the first semicircular flange (13) at both axial ends of the first protective cover (9), and a second arc-shaped sealing strip (20) is embedded in the butt joint surface of the second semicircular flange (14) at both axial ends of the second protective cover (10). The first arc-shaped sealing strip (19) and the second arc-shaped sealing strip (20) at the same end can be spliced into a full-circle annular sealing strip. The first annular sealing strip (20) is embedded in the butt joint surface of the first fixed flange (15). 1), a second annular sealing strip (22) is embedded on the butt joint surface of the second fixed flange (16), and when the axial ends of the filling protection component are respectively fixedly connected to the first fixed flange (15) and the second fixed flange (16), the first annular sealing strip (21) and the second annular sealing strip (22) are respectively squeezed and sealed with the first arc-shaped sealing strip (19) and the second arc-shaped sealing strip (20) at the axial ends of the filling protection component.
4. The leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas according to claim 3, characterized in that: Sealing protrusions (23) are fixedly provided on the mating surfaces of the first fixed flange (15) and the second fixed flange (16) located at the two axial ports of the filling protection assembly, and the outer side walls of the sealing protrusions (23) are in sealing contact with the inner side walls of the first protection cover (9) and the second protection cover (10).
5. The leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas according to claim 4, characterized in that: An air pump (24) is fixedly mounted on the recovery tank (3), and an air outlet pipe (25) is connected to the bottom of one side of the recovery tank (3), and an air outlet electromagnetic control valve (26) is mounted on the air outlet pipe (25).
6. The leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas according to claim 5, characterized in that: An air intake electromagnetic control valve (27) is installed on the gas recovery pipe (8).
7. The leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas according to claim 1, characterized in that: A bottom gas pipe (28) and a top gas pipe (29) are also provided on the outside of the mixed gas storage tank (2); the air inlet pipe (4), the bottom gas pipe (28) and the top gas pipe (29) are connected via a tee pipe; the lower opening of the tee pipe is connected to one end of the air inlet pipe (4); the left and right openings of the tee pipe are respectively connected to one end of the top gas pipe (29) and one end of the bottom gas pipe (28); the other end of the top gas pipe (29) extends upward and is connected to the top of the mixed gas storage tank (2); the other end of the bottom gas pipe (28) extends downward and is connected to the bottom of the mixed gas storage tank (2); and stop valves are installed on the air inlet pipe (4), the bottom gas pipe (28) and the top gas pipe (29).
8. The leak-proof recovery device for direct charging of argon and carbon dioxide mixed gas according to claim 7, characterized in that: The horizontal angle of the axis of the air intake pipe (4) at the air intake joint (6) is 30°-60°.
9. The leak-proof recovery device for direct filling of argon and carbon dioxide mixed gas according to claim 1, characterized in that: The mixed gas storage tank (2) is also equipped with a pressure gauge (30).
10. The leak-proof recovery device for direct filling of argon and carbon dioxide mixed gas according to claim 1, characterized in that: A through groove is provided through the side surface of the bracket base (1).