A device and process for preparing mixed gas for cutting and welding

Abstract

This invention discloses a device and process for preparing a mixed gas for cutting and welding, comprising a gas inlet, a gas filling section, a transfer section, and a conveying section. The gas inlet fills different types of gases into acetylene cylinders on the gas filling section via a first gas guide pipe. The gas filling section is located on one side of the gas inlet, and its outlet end is connected to another set of gas filling sections via a transfer section to form a ring structure. A first conveying mechanism is provided inside the gas inlet for transporting the acetylene cylinders. The transfer section is equipped with a second conveying mechanism and a material handling mechanism to transfer the acetylene cylinders to another set of gas filling sections, cooperating with the gas inlet to sequentially fill different gases. The conveying section transfers the filled acetylene cylinders to a uniform mixing section for uniform mixing and collection. This invention enables the mixing of acetylene, propane, and combustion-supporting additives to form a complementary mixed gas for cutting and welding, which is then filled into steel cylinders.

Description

Technical Field

[0001] This invention relates to the field of welding and cutting gas preparation technology, and in particular to a device and process for preparing mixed gas for cutting and welding. Background Technology

[0002] Natural gas refers to all gases that exist naturally in the world, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcano gas, coalbed methane, and biogenic gas). However, the commonly used definition of "natural gas" is a narrower definition from an energy perspective, referring to a mixture of hydrocarbon and non-hydrocarbon gases naturally occurring in underground strata. After liquefaction, natural gas needs to be mixed with other gases to form gases with different functions. Acetylene, the simplest alkyne compound, is a colorless, highly flammable gas at room temperature, mainly used for lighting, welding, and rubber synthesis. Acetylene is slightly soluble in water but soluble in ethanol and acetone. It is chemically very reactive, posing a violent explosion hazard in both liquid and solid states. It burns with black smoke, has high chemical reactivity, a low ignition point, burns rapidly, is prone to backfire, and is highly flammable and explosive, with a low safety factor. Its production process is energy-intensive, polluting, and costly, resulting in numerous defects and hidden dangers in production, storage, transportation, use, environmental protection, and pricing, significantly limiting its development. When acetylene is used to cut carbon steel, it easily causes melting at the upper edge of the cut, excessive slag that is difficult to remove, and local hardening of the cut surface. The cutting process is not ideal, and grinding is required during welding, which increases production costs.

[0003] Propane burns without producing black smoke and is less prone to backfire. Because the heat distribution of a propane flame is dispersed and the temperature is relatively low, the possibility of metal melting during cutting is low. Therefore, the upper edge of the cut is less likely to collapse, resulting in a smooth and flat cut, and the lower edge has less slag, which is easy to remove. However, its disadvantage is that its combustion temperature in oxygen is below 2500 °C, making it unsuitable as a direct cutting gas. It requires the addition of synergistic additives to catalyze, crack, and support combustion of the base gas, thereby increasing the flame temperature. Both cutting and welding gases have significant drawbacks. Therefore, developing a cutting and welding mixed gas that combines acetylene, propane, and synergistic additives to create a complementary, safe, reliable, stable, and highly effective gas has been a research direction for those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a cutting and welding mixed gas preparation apparatus and process to solve the above-mentioned problems, which can realize the mixing of acetylene, propane and synergistic additives to form a complementary cutting and welding mixed gas, thereby improving the cutting efficiency.

[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0006] A mixed gas preparation device for cutting and welding includes a gas inlet, a gas filling section, a transfer section, and a conveying section. The gas inlet fills different types of gases into acetylene cylinders on the gas filling section through a first gas inlet pipe. The gas filling section is located on one side of the gas inlet, and its outlet end is connected to another set of gas filling sections through the transfer section to form a ring structure. A first conveying mechanism is provided inside the gas inlet for transporting the acetylene cylinders. The transfer section is provided with a second conveying mechanism and a material handling mechanism to transfer the acetylene cylinders to another set of gas filling sections, cooperating with the gas inlet to fill different gases sequentially. The conveying section is located on one side of the transfer section and transfers the filled acetylene cylinders to a uniform shaking section for uniform shaking and collection.

[0007] Furthermore, the gas inlet unit includes a first storage tank, a second storage tank, a third storage tank, a fourth storage tank, and a fifth storage tank disposed on the upper part of the first fixed support. The second storage tank is connected to the first gas inlet pipe via a second gas inlet pipe, and one end of the first gas inlet pipe is connected to the first storage tank via the fifth gas inlet pipe. The fifth storage tank is connected to the first gas inlet pipe via a sixth gas inlet pipe. The first gas inlet pipe is connected to the third storage tank and the fourth storage tank via the third gas inlet pipe and the fourth gas inlet pipe, respectively. The third gas inlet pipe and the fourth gas inlet pipe are provided with a third control valve and a fourth control valve at their upper parts. The fifth gas inlet pipe is provided with a first control valve at its upper part, the second gas inlet pipe is provided with a second control valve at its upper part, and the sixth gas inlet pipe is provided with a fifth control valve at its upper part. The upper part of the first gas inlet pipe is provided with a plurality of gas filling pipes, and the gas filling pipes are connected to an acetylene cylinder. The upper part of the gas filling pipes is provided with a sixth control valve and a pressure gauge for controlling the gas flow of the gas filling pipes.

[0008] Furthermore, the first conveying mechanism includes a first transport trough, a first sprocket, a first chain, a metal sheet, a first drive motor, and a clamping and conveying mechanism. The first sprocket is provided inside the first transport trough, and the first sprocket is connected to another sprocket through the first chain to form a closed loop structure. The first sprocket is connected to the first drive motor through a rotating shaft. The metal sheet and the clamping and conveying mechanism are provided inside the first transport trough.

[0009] Furthermore, the clamping and conveying mechanism includes a first loading platform, a transfer trough, a first conveyor belt, and clamping components. The upper part of the first loading platform is provided with a transfer trough, and the interior of the transfer trough is provided with a first conveying platform. Clamping components are symmetrically arranged on both sides of the transfer trough.

[0010] Furthermore, the clamping assembly includes a first support frame, a push rod, a first screw, a lifting support, a connecting rod, and a clamping limiting ring. The first screw is mounted on the first support frame via a bearing seat, and two lifting supports are symmetrically arranged on the upper part of the first screw. The lifting supports are connected to a connecting block at one end of the push rod via a connecting rod, and a clamping limiting ring is provided on the other end of the push rod. The connecting block is connected to a first sliding groove on the first support frame via first sliders on both sides to form a sliding push structure. A second drive motor is provided on the upper part of the first support frame, and the second drive motor is connected to the first screw via a coupling. A control console, a battery, and a power collection mechanism are provided on the first loading platform below the second drive motor. The power collection mechanism includes a first telescopic rod located at the bottom of the first loading platform, and a first pressure spring is provided on the outside of the first telescopic rod to form an elastic structure. A rotating ball is provided at one end of the first telescopic rod, and the rotating ball connects with a metal sheet inside the first transport groove to collect electricity from the metal sheet.

[0011] Furthermore, the second conveying mechanism includes a second fixed bracket, a second chute, a second screw, a sliding platform, and a third drive motor. The sliding platform is connected to the second chute and the second screw on the second fixed bracket via a second slider and a nut at its lower part, and one end of the second screw is connected to the third drive motor via a coupling. The sliding platform is connected to the material handling mechanism via a first connecting rod. The material handling mechanism includes a second carrying platform, a guide chute, a first idler roller, a push plate, and a first pneumatic cylinder. The second carrying platform has guide chute symmetrically arranged inside, and a plurality of first idler rollers are arranged inside the guide chute. A first pneumatic cylinder is arranged at one end of the second carrying platform, and a push plate is arranged on the output shaft of the first pneumatic cylinder.

[0012] Furthermore, the conveying unit includes a third fixed support, a second conveying trough, a second conveyor belt, and a protective mechanism. The second conveying trough is provided on the upper part of the third fixed support, and the inlet of the second conveying trough is connected to the second fixed support. A second conveyor belt is provided inside the second conveying trough. Several protective mechanisms are provided on the upper part of the second conveying trough. The protective mechanism includes a fixed support, a second connecting rod, a second pressure spring, a connecting plate, and an auxiliary rotating wheel. The connecting plate is connected to the through hole on the fixed support through the second connecting rod, and a second pressure spring is provided on the outside of the second connecting rod. The two ends of the second pressure spring are respectively connected to the fixed support and the connecting plate to form an elastic structure. An auxiliary rotating wheel is provided on the support of the connecting plate, and the auxiliary rotating wheel is a flexible rubber wheel.

[0013] Furthermore, the equalizing unit includes an equalizing mechanism and a stepping conveying mechanism. The stepping conveying mechanism includes a fourth fixed support, second idlers, a drive platform, a sliding bar, a third screw, a moving platform, and a propulsion mechanism. The fourth fixed support has several second idlers inside, and a drive platform is provided on one side of the fourth fixed support. The upper part of the drive platform has a sliding bar and a third screw. The moving platform is connected to the sliding bar and the third screw on the drive platform through a third sliding groove and a third screw hole at its bottom, respectively. The upper part of the moving platform has a propulsion mechanism, which includes a propulsion plate, a second pneumatic cylinder, a push rod, and propellers. One end of the drive platform has a second pneumatic cylinder, and the output shaft of the second pneumatic cylinder is connected to the propulsion plate. The propulsion plate is connected to the push rod through a connector. The upper part of the push rod has several propellers. The middle part of the propeller has a semi-circular opening, and the interior of the semi-circular opening has a rubber pad layer.

[0014] The fourth fixed support has a rectangular opening on one side, and a shaking mechanism is installed inside the rectangular opening to shake the gas in the acetylene cylinder. The shaking mechanism includes a fifth fixed support, a fixed rotating chamber, a drive box, rotating rollers, a feeding rack, and a drive assembly. The fixed rotating chamber is a rectangular cavity structure with an opening on one side, and the two sides of the fixed rotating chamber are movably connected to the connecting holes at the rectangular opening through connecting shafts. Several rotating rollers are installed inside the fixed rotating chamber, and one end of each rotating roller is connected to the drive box at the top. A feeding rack is installed on one side of the fixed rotating chamber, and several actuating rods are installed on the upper part of the feeding rack. The actuating rods are respectively positioned at the gaps formed by the two second support rollers.

[0015] Furthermore, the drive box is internally equipped with a second sprocket and a third sprocket connected to one end of the rotating roller, and the second sprocket and the third sprocket are connected to other rotating rollers via a second chain and a third chain. A fourth drive motor is provided on the upper part of the drive box. The drive assembly is located at the connection between the fixed rotating chamber and the fourth fixed bracket. The drive assembly includes a drive gear mounted on a connecting shaft, which meshes with a drive gear on one side. One end of the drive gear is connected to a fifth drive motor on a motor support via a connector. The second idler roller is located in an idler roller fixing seat, and one end of the idler roller fixing seat is fixedly connected to the fourth fixed bracket via screws. The lower part of the idler roller fixing seat is connected to one side of the fourth fixed bracket via a third connecting rod and a connecting buckle.

[0016] A process for preparing a mixed gas for cutting and welding, wherein the mass ratio of the components is: dimethylformamide 0.5%-1%, ethanol 3%-6%, propane 30%-40%, acetylene 55%-65%, and synergistic additive 0.5%-1%, and the preparation process includes the following steps:

[0017] S1. Dimethylformamide filling: Place the acetylene cylinder on the first conveying platform of the first loading platform, and open the first control valve to introduce the dimethylformamide in the first storage tank into the first gas delivery pipe, and fill it into the acetylene cylinder through the gas filling pipe.

[0018] S2. Ethanol filling: Close the first control valve and open the second control valve to introduce the ethanol in the second storage tank into the first gas delivery pipe, and then fill it into the acetylene cylinder through the gas filling pipe.

[0019] S3. Propane gas filling: Close the second control valve and open the third control valve to introduce the propane gas in the third storage tank into the first gas delivery pipe, and fill it into the acetylene cylinder through the filling pipe and pressurize it.

[0020] S4. Acetylene gas filling: Close the third control valve and open the fourth control valve to introduce the acetylene gas in the fourth storage tank into the first gas delivery pipe, and fill it into the acetylene cylinder through the filling pipe and pressurize it.

[0021] S5. Additive filling: Close the fourth control valve and open the fifth control valve to introduce the additive in the fifth storage tank ring into the first gas guide pipe, fill it into the acetylene cylinder through the gas filling pipe, and pressurize it.

[0022] S6. Shake evenly: Shake evenly the acetylene cylinders that have been filled in step S5, and mix them evenly through the shaking unit.

[0023] In step S1, the weight of the acetylene cylinder and the weight after dimethylformamide is introduced are recorded by the weighing device built into the first loading platform. After the filling weight reaches the requirement, the first control valve is closed.

[0024] In step S2, the weight of the ethanol filling is recorded by the weighing device built into the first loading platform, and the second control valve is closed after the filling requirement is met.

[0025] In step S3, when propane gas is introduced for filling, the pressure is 0.35MPa-0.8MPa, and the filling amount is 0.4kg-0.6kg.

[0026] In step S4, when acetylene gas is introduced for filling, the pressurization pressure is 2.2MPa-2.3MPa, and the filling amount is 2.5kg-3.2kg.

[0027] In step S6, the shaking time is 15-20 minutes, and the shaking speed is 50-60 rpm.

[0028] In steps S1-S5, when one valve is opened, all other valves are closed.

[0029] The present invention has the following advantages and beneficial effects:

[0030] In this invention, the entire preparation device includes an inlet section, a gas filling section, a transfer section, a conveying section, and a uniform mixing section. The inlet section is equipped with several storage tanks to store different gases and fill them into the acetylene cylinder through a gas delivery pipe. The gas filling section is used in combination with the transfer section to move and transport the acetylene cylinder, which is convenient for filling different gases.

[0031] In this invention, the upper part of the first conveying mechanism is provided with a first sprocket and a first chain. The first chain is a variable speed chain, used for the upper clamping conveying mechanism and the transport of acetylene cylinders. The clamping conveying mechanism, as the main component for transporting acetylene cylinders, uses two symmetrically arranged clamping assemblies. Driven by the second drive motor, the first screw is rotated, which in turn pushes the push rod through the lifting support and connecting rod, and drives the clamping limit ring to fix the acetylene cylinder and prevent it from moving during filling.

[0032] In this invention, an independent mixing device is designed. The acetylene cylinder containing dimethylformamide solvent is driven by a stepping conveyor mechanism. After reaching a predetermined work station, it can be mixed by a shaking mechanism. The shaking mechanism is set at the rectangular opening of the fourth fixed support. After shaking is completed, it can be reset into the fourth fixed support and transported, realizing automated shaking and automated transportation.

[0033] In this invention, the acetylene and ethanol are dissolved again, and the ethanol further absorbs and dissolves the mixture, making the entire gas mixture more stable. Then, a certain amount of propane and synergistic additives are added to mix it, forming a highly efficient, energy-saving, and environmentally friendly mixed gas. The raw materials of these components are compatible, safe, reliable, and of stable quality. Furthermore, the uniquely designed preparation and filling device can effectively fill different gases into the acetylene cylinder. The preparation process uses an automated control system to automatically add each raw material component with high precision, saving labor and improving production efficiency and user economic benefits.

[0034] In this invention, filling the acetylene cylinder with a certain proportion of acetylene, propane and ethanol can increase economic benefits. Adding an synergistic additive can enhance the combustion temperature and activity of the mixed gas, making it safer and more reliable to use. It is the most ideal mixed gas for cutting and welding today and has high economic value. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2This is a partial structural diagram of the gas inlet section of the present invention;

[0037] Figure 3 This is a schematic diagram of a portion of the clamping and conveying mechanism of the present invention;

[0038] Figure 4 This is a schematic diagram of a portion of the clamping component of the present invention;

[0039] Figure 5 This is a partial structural diagram of the second conveying mechanism of the present invention;

[0040] Figure 6 This is a schematic diagram of a portion of the material feeding mechanism of the present invention;

[0041] Figure 7 This is a schematic diagram of the conveying section structure of the present invention;

[0042] Figure 8 This is a schematic diagram of a portion of the protective mechanism of the present invention;

[0043] Figure 9 This is a schematic diagram of a portion of the stepping conveyor mechanism of the present invention;

[0044] Figure 10 This is a schematic diagram of part of the propulsion mechanism of the present invention;

[0045] Figure 11 This is a schematic diagram of the drive unit structure of the present invention;

[0046] Figure 12 This is a schematic diagram of the structure of the equalizing mechanism of the present invention;

[0047] Figure 13 This is a schematic diagram of the connection structure between the idler roller fixing seat and the fourth fixing bracket of the present invention;

[0048] Figure 14 This is a schematic diagram of the structure of the control valve connection of the present invention;

[0049] Icons: 1-Gas inlet, 2-Gas filling, 3-Transfer section, 4-Conveying section, 101-First fixed bracket, 102-First storage tank, 103-Second storage tank, 104-Third storage tank, 105-Fourth storage tank, 106-First gas guide pipe, 107-Second gas guide pipe, 108-Second control valve, 109-First control valve, 110-Sixth control valve, 111-Pressure gauge, 112-Acetylene cylinder, 113-Third control valve, 114-Fourth control valve, 115-Fifth storage tank, 116-Sixth gas guide pipe, 117-Fifth gas guide pipe 201-Control valve, 202-First transport trough, 203-First chain, 204-First drive motor, 206-First loading platform, 207-Transfer trough, 208-First conveying platform, 209-First support frame, 210-First telescopic rod, 211-First pressure spring, 212-Rotating ball, 213-Clamping limit ring, 214-Push rod, 215-First slide, 216-Connecting block, 218-First screw, 219-Lifting support, 220-Connecting rod, 221-Second drive motor, 301-Second fixed bracket, 302-Second slide 303-Second Screw, 304-Sliding Platform, 305-Third Drive Motor, 307-First Connecting Rod, 308-Second Slider, 309-Nut, 310-Second Loading Platform, 311-Guide Groove, 312-First Idler Roller, 313-Push Plate, 314-First Pneumatic Cylinder, 401-Third Fixed Bracket, 402-Second Transport Groove, 403-Second Conveyor Belt, 404-Fixed Support, 405-Second Pressure Spring, 406-Second Connecting Rod, 407-Connecting Plate, 408-Auxiliary Rotary Wheel, 501-Fourth Fixed Bracket, 502-Drive Platform, 503 - Sliding bar, 504 - Third screw, 505 - Second idler roller, 506 - Fifth fixed bracket, 508 - Second pneumatic cylinder, 509 - Propeller plate, 510 - Push rod, 511 - Propeller, 514 - Moving table, 515 - Fixed rotating chamber, 516 - Drive gear, 517 - Drive box, 518 - Drive gear, 519 - Fifth drive motor, 520 - Rotating roller, 522 - Second chain, 523 - Third chain, 524 - Fourth drive motor, 525 - Material feeder, 526 - Connecting shaft, 527 - Idler roller fixing seat, 528 - Third connecting rod, 529 - Connecting buckle. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0051] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0052] like Figure 1 , Figure 2 and Figure 14 The apparatus for preparing mixed gas for cutting and welding includes a gas inlet 1, a gas filling 2, a transfer 3, and a conveying 4. The gas inlet 1 fills different types of gases into acetylene cylinders 112 on the gas filling 2 through a first gas guide pipe 106. The gas filling 2 is located on both sides of the gas inlet 1, and the outlet end of the gas filling 2 is connected to another set of gas filling 2 through the transfer 3 to form a ring structure. The gas inlet 1 is equipped with a first conveying mechanism for transporting the acetylene cylinders 112. The transfer 3 is equipped with a second conveying mechanism and a material handling mechanism to transfer the acetylene cylinders 112 to another set of gas filling 2, which cooperates with the gas inlet 1 to fill different gases in sequence. The conveying 4 is located on one side of the transfer 3 and transfers the filled acetylene cylinders 112 to a shaking section for shaking and collection.

[0053] It should be noted that, in order to prepare the mixed gas, dimethylformamide, ethanol, acetylene, propane, and synergistic additives need to be sequentially filled into the acetylene cylinder 112 in steps. Unlike the previous single acetylene filling method, a device that can circulate and move the acetylene cylinder 112 for filling has been designed based on the original filling method to improve filling and transportation efficiency. The device includes a gas inlet 1, a gas filling 2, a transfer 3, and a conveying 4. The gas inlet 1 is equipped with different gas storage tanks to prepare for gas filling. The gas filling 2 is located on both sides of the gas inlet 1 and moves the acetylene cylinder 112 through the internal first conveying mechanism. The transfer 3 is used to transfer the acetylene cylinder 112 to the other side of the gas inlet 1 for filling with other gases. Different stations and different gases can be filled on one device.

[0054] like Figure 1 , Figure 2 and Figure 14As shown, the gas inlet unit 1 includes a first storage tank 102, a second storage tank 103, a third storage tank 104, a fourth storage tank 105, and a fifth storage tank 115 disposed on the upper part of the first fixed bracket 101. The second storage tank 103 is connected to the first gas inlet pipe 106 via a second gas inlet pipe 107, and one end of the first gas inlet pipe 106 is connected to the first storage tank 102 via the fifth gas inlet pipe. The fifth storage tank 115 is connected to the first gas inlet pipe 106 via a sixth gas inlet pipe 116. Connections; the first air guide pipe 106 is connected to the third storage tank 104 and the fourth storage tank 105 respectively through the third air guide pipe and the fourth air guide pipe, and the upper part of the third air guide pipe and the fourth air guide pipe is provided with the third control valve 113 and the fourth control valve 114; the upper part of the fifth air guide pipe is provided with the first control valve 109, the upper part of the second air guide pipe 107 is provided with the second control valve 108, and the upper part of the sixth air guide pipe 116 is provided with the fifth control valve 117;

[0055] The upper part of the first gas guide pipe 106 is provided with several gas filling pipes, and the gas filling pipes are connected to the acetylene cylinder 112. The upper part of the gas filling pipes is provided with a sixth control valve 110 and a pressure gauge 111 for controlling the gas flow of the gas filling pipes.

[0056] It should be noted that the first fixed support 101 is a rectangular frame structure. A first storage tank 102, a second storage tank 103, a third storage tank 104, a fourth storage tank 105, and a fifth storage tank 115 are installed on the upper part of the first fixed support 101. The first storage tank 102 stores dimethylformamide, the second storage tank 103 stores ethanol, the third storage tank 104 stores propane gas, the fourth storage tank 105 stores acetylene gas, and the fifth storage tank 115 stores synergistic additives. The filling process is controlled by valves, which can be replaced with CNC valves for automated filling. During filling, the acetylene cylinder 112 is placed on the first loading platform 206, which is equipped with a weighing device that displays the weight in real time, thereby controlling the quality of gas filling. By controlling the valves, different raw materials are sequentially filled into the acetylene cylinder 112.

[0057] like Figure 2 , Figure 3 , Figure 4 and Figure 14As shown, the first conveying mechanism includes a first transport trough 201, a first sprocket, a first chain 203, a metal sheet 202, a first drive motor 204, and a clamping conveying mechanism. The first sprocket is disposed inside the first transport trough 201, and the first sprocket is connected to another sprocket through the first chain 203 to form a closed loop structure. The first sprocket is connected to the first drive motor 204 through a rotating shaft. The metal sheet 202 and the clamping conveying mechanism are disposed inside the first transport trough 201. The clamping conveying mechanism includes a first loading platform 206, a transfer trough 207, a first conveyor belt, and clamping components. The transfer trough 207 is disposed on the upper part of the first loading platform 206, and the first conveying platform 208 is disposed inside the transfer trough 207. Clamping components are symmetrically disposed on both sides of the transfer trough 207.

[0058] It should be noted that the first transport trough 201 is equipped with a first sprocket and a first chain 203. The first chain 203 is a variable speed chain, which can support the movement of the clamping and conveying mechanism. In order to improve the load-bearing capacity of the first chain 203, a chain groove is designed on the inner wall of the first transport trough 201 to support and assist the movement. The first transport trough 201 is equipped with a metal plate 202 and a stopper. The metal plate 202 is used to conduct electricity and charge the battery of the clamping and conveying mechanism. The stopper is used to block and position the first loading platform 206 of the clamping and conveying mechanism when it moves to the corresponding position by a sensor, thus limiting the entire first loading platform 206 to a fixed position. After the gas filling is completed, the stopper resets, and the clamping and conveying mechanism continues to run on the first chain 203.

[0059] It should be further explained that the acetylene cylinder 112 is placed on the first conveyor belt of the first conveying platform 208. During transportation, the acetylene cylinder 112 may shift, especially during filling. The acetylene cylinder 112 needs to be stabilized to prevent it from shifting. Therefore, the upper part of the first loading platform 206 is designed with clamping components to clamp and limit the acetylene cylinder 112 through the clamping components on both sides.

[0060] like Figure 3 , Figure 4 and Figure 14As shown, the clamping assembly includes a first support frame 209, a push rod 214, a first screw 218, a lifting support 219, a connecting rod 220, and a clamping limiting ring 213. The first screw 218 is mounted on the first support frame 209 via a bearing seat, and two lifting supports 219 are symmetrically arranged on the upper part of the first screw 218. The lifting supports 219 are connected to a connecting block 216 on one end of the push rod 214 via the connecting rod 220, and a clamping limiting ring 213 is provided on the other end of the push rod 214. The connecting block 216 is connected to a first sliding groove 215 on the first support frame 209 via first sliders on both sides, forming a sliding push structure. A second drive motor 221 is provided on the upper part of the support frame 209, and the second drive motor 221 is connected to the first screw 218 through a coupling. A control console, a battery and a power collection mechanism are provided on the first loading platform 206 below the second drive motor 221. The power collection mechanism includes a first telescopic rod 210 provided at the bottom of the first loading platform 206, and a first pressure spring 211 is provided on the outside of the first telescopic rod 210 to form an elastic structure. A rotating ball 212 is provided at one end of the first telescopic rod 210, and the rotating ball 212 is connected to the metal plate 202 inside the first transport trough 201 to collect the power on the metal plate 202.

[0061] It should be noted that the clamping assembly, as a limiting component for the acetylene cylinder 112, needs to stabilize and limit both sides of the acetylene cylinder 112. The technical solution adopted is to drive the first screw 218 to rotate through the second drive motor 221. Moreover, the first screw 218 is a bidirectional screw. During the rotation of the first screw 218, the lifting support 219 is driven to rise and fall. Since the lifting support 219 is connected to the connecting block 216 at one end of the push rod 214 through the connecting rod 220, the lifting support 219 can push the connecting block 216 forward, thereby pushing the clamping and limiting ring 213 on the other end of the push rod 214, thus limiting the acetylene cylinder 112.

[0062] It should be further explained that the clamping assembly, as an independent limiting assembly, is powered by the battery at the bottom and controlled by the control console. During operation, the operator activates the clamping assemblies on both sides as needed to achieve the limiting. Considering that the battery may become insufficient after long-term operation, a power collection structure is designed at the bottom of the first loading platform 206. The rotating ball 212 on the first telescopic rod 210 contacts the metal plate 202, and the rotating ball 212 is a metal ball, thereby collecting electricity to charge the battery. Considering that the contact between the rotating ball 212 and the metal plate 202 may be unstable during the movement of the first loading platform 206 on the first chain 203, a first pressure spring 211 is designed on the outside of the first telescopic rod 210 to form a structure with elastic stress, ensuring that the rotating ball 212 and the metal plate 202 can make stable contact.

[0063] like Figure 2 , Figure 5 , Figure 6 and Figure 14 As shown, the second conveying mechanism includes a second fixed bracket 301, a second chute 302, a second screw 303, a sliding platform 304, and a third drive motor 305. The sliding platform 304 is connected to the second chute 302 and the second screw 303 on the second fixed bracket 301 via a second slider 308 and a nut 309 at its lower part, and one end of the second screw 303 is connected to the third drive motor 305 via a coupling. The sliding platform 304 is connected to the material feeding mechanism via a first connecting rod 307. The material feeding mechanism includes a second loading platform 310, a guide chute 311, a first idler roller 312, a pusher plate 313, and a first pneumatic cylinder 314. The guide chute 311 is symmetrically arranged inside the second loading platform 310, and a plurality of first idler rollers 312 are arranged inside the guide chute 311. The first pneumatic cylinder 314 is arranged at one end of the second loading platform 310, and a pusher plate 313 is arranged on the output shaft of the first pneumatic cylinder 314.

[0064] It should be noted that during the filling process of acetylene cylinder 112, after the first two materials are filled, the acetylene cylinder 112 needs to be moved to another workstation and transferred to the other side of the first fixed support 101. Therefore, a second conveying mechanism is designed, which can drive the second screw 303 to rotate through the third drive motor 305, thereby driving the entire sliding platform 304 to move back and forth. A material handling mechanism is designed on the upper part of the sliding platform 304 to support the entire clamping and conveying mechanism and the acetylene cylinder 112. The upper part of the second carrying platform 310 is provided with a guide groove 311 and a first roller 312, which are connected to the first transport trough 201 to receive the entire clamping and conveying mechanism and the acetylene cylinder 112. Under the rotation of the second screw 303, it is moved to the feed port of the transport trough on the other side, and the push plate 313 is activated to push it forward to achieve the transfer. This structure design can realize automated transportation and greatly reduce the cost and labor of manual transfer.

[0065] like Figure 5 , Figure 7 , Figure 8 and Figure 14 As shown, the conveying unit 4 includes a third fixed support 401, a second conveying trough 402, a second conveyor belt 403, and a protective mechanism. The second conveying trough 402 is provided on the upper part of the third fixed support 401, and the inlet of the second conveying trough 402 is connected to the second fixed support 301. The second conveyor belt 403 is provided inside the second conveying trough 402. Several protective mechanisms are provided on the upper part of the second conveying trough 402. The protective mechanism includes a fixed support 404, a second connecting rod 406, a second pressure spring 405, a connecting plate 407, and an auxiliary rotating wheel 408. The connecting plate 407 is connected to the through hole on the fixed support 404 through the second connecting rod 406, and the second pressure spring 405 is provided on the outside of the second connecting rod 406. The two ends of the second pressure spring 405 are respectively connected to the fixed support 404 and the connecting plate 407 to form an elastic structure. The auxiliary rotating wheel 408 is provided on the support of the connecting plate 407, and the auxiliary rotating wheel 408 is a flexible rubber wheel.

[0066] It should be noted that the conveying unit 4, as a transportation mechanism, transfers the filled acetylene cylinder 112. A second transport trough 402 is provided on the upper part of the third fixed bracket 401, and a second conveyor belt 403 is installed inside the second transport trough 402 for transportation. One end of the second transport trough 402 is connected to one end of the second fixed bracket 301. In use, the clamping assembly on the acetylene cylinder 112 is opened, and the first conveyor belt is started to guide the acetylene cylinder 112 onto the second conveyor belt 403. To ensure the smooth operation of the acetylene cylinder 112 during transport and prevent it from tilting to either side, a protective mechanism is used for stabilization. The protective mechanism is arranged in a row on the upper part of the second transport trough 402. The auxiliary rotating wheel 408 on the internal connecting plate 407 of the protective mechanism can assist in guiding the acetylene cylinder 112 and prevent hard contact between the two. At the connection between the connecting plate 407 and the fixed support 404, a second pressure spring 405 is installed on the outer wall of the second connecting rod 406 to form an elastic structure and play a buffering role.

[0067] like Figures 9-14As shown, the equalizing unit includes an equalizing mechanism and a stepping conveying mechanism. The stepping conveying mechanism includes a fourth fixed support 501, second idlers 505, a drive platform 502, a sliding bar 503, a third screw 504, a moving table 514, and a propulsion mechanism. The fourth fixed support 501 has several second idlers 505 inside, and a drive platform 502 is located on one side of the fourth fixed support 501. A sliding bar 503 and a third screw 504 are located on the upper part of the drive platform 502. The moving table 514 is connected to the bottom... The third sliding groove and the third screw hole of the part are respectively connected to the sliding bar 503 and the third screw 504 on the drive platform 502. The upper part of the moving stage 514 is provided with a propulsion mechanism, which includes a propulsion plate 509, a second pneumatic cylinder 508, a push rod 510 and a propeller 511. The second pneumatic cylinder 508 is provided at one end of the drive platform 502, and the output shaft of the second pneumatic cylinder 508 is connected to the propulsion plate 509. The propulsion plate 509 is connected to the push rod 510 through a connector. The push rod 510... The upper part of the 0 is provided with several propellers 511; the middle part of each propeller 511 is provided with a semi-circular opening, and the interior of the semi-circular opening is provided with a rubber pad layer; one side of the fourth fixed bracket 501 is provided with a rectangular opening, and the interior of the rectangular opening is provided with a uniform shaking mechanism, which can perform uniform shaking treatment on the gas in the acetylene cylinder 112. The uniform shaking mechanism includes a fifth fixed bracket 506, a fixed rotating chamber 515, a drive box 517, a rotating roller 520, a feeding frame 525, and a drive group. The fixed rotating chamber 515... 5 is a rectangular cavity structure with an opening on one side, and the two sides of the fixed rotating chamber 515 are movably connected to the connecting holes at the rectangular opening of the fifth fixed bracket 506 through the connecting shaft 526. The interior of the fixed rotating chamber 515 is provided with several rotating rollers 520, and one end of the rotating rollers 520 is connected to the upper drive box 517. A material feeding frame 525 is provided on one side of the fixed rotating chamber 515, and several actuating rods are provided on the upper part of the material feeding frame 525, and the actuating rods are respectively provided at the gaps formed by the two second support rollers 505.

[0068] It should be noted that during the transportation of acetylene cylinder 112, it is necessary to perform uniform shaking to mix the different gases inside. Therefore, a uniform shaking mechanism and a stepping conveying mechanism are designed. Several second rollers 505 are set inside the fourth fixed support 501, and a moving platform 514 is set on one side of the fourth fixed support 501. The moving platform 514 can move on the driving platform 502 under the drive of the third screw 504. A propulsion mechanism is set on the upper part of the moving platform 514 to facilitate the propulsion of the acetylene cylinder 112.

[0069] It should be noted that, in order to cooperate with the shaking mechanism for uniform shaking, the acetylene cylinders 112 need to be pushed in a step-by-step manner during transportation. Generally, four cylinders are pushed at a time. The upper part of the moving platform 514 is equipped with a second pneumatic cylinder 508, which is connected to the push rod 510 through a push plate 509. The push rod 510 is equipped with several pushers 511. In use, the second pneumatic cylinder 508 is activated to lock the pushers 511 onto the acetylene cylinders 112. At this time, the third screw 504 is activated, and the acetylene cylinders 112 are pushed forward by the movement of the moving platform 514. After pushing a fixed distance, the second pneumatic cylinder 508 is reset and the push rod 510 is retracted. During the reciprocating movement of the push rod 510, the acetylene cylinders 112 are pushed in batches.

[0070] It should be further explained that the uniform shaking mechanism is located at the rectangular opening on one side of the fourth fixed bracket 501. The fixed rotating chamber 515 is movably connected to the through hole of the fourth fixed bracket 501 via the connecting shaft 526 and is rotated by the drive group. Under the drive of the drive group, the entire fixed rotating chamber 515 can rotate, and the acetylene cylinder 112 on the fourth fixed bracket 501 is lifted by the material feeding rack 525 and introduced into the fixed rotating chamber 515, where it comes into contact with the rotating roller 520 inside the fixed rotating chamber 515. Under the rotation of the rotating roller 520, all the acetylene cylinders 112 are rotated to achieve uniform shaking. After uniform shaking is completed, the fixed rotating chamber 515 is reset under the drive of the drive group, and the acetylene cylinders 112 are sent back to their original positions for subsequent transportation.

[0071] It should be noted that a fifth fixed bracket 506 is provided at the rectangular opening of the fourth fixed bracket 501, and a blocking block is provided inside the fifth fixed bracket 506, which plays a blocking role when the fixed rotating chamber 515 rotates at a certain angle.

[0072] like Figures 9-14As shown, the drive box 517 is equipped with a second sprocket and a third sprocket connected to one end of the rotating roller 520. The second sprocket and the third sprocket are connected to other rotating rollers 520 via a second chain 522 and a third chain 523. A fourth drive motor 524 is provided on the upper part of the drive box 517. The drive assembly is located at the connection between the fixed rotating chamber 515 and the fourth fixed bracket 501. The drive assembly includes a drive gear 516 mounted on a connecting shaft 526. The drive gear 516 meshes with a drive gear 518 on one side. One end of the drive gear 518 is connected to a fifth drive motor 519 on a motor support via a connector. The second idler roller 505 is located in an idler roller fixing seat 527. One end of the idler roller fixing seat 527 is fixedly connected to the fourth fixed bracket 501 via screws. The lower part of the idler roller fixing seat 527 is connected to one side of the fourth fixed bracket 501 via a third connecting rod 528 and a connecting buckle 529.

[0073] It should be noted that the rotating roller 520 inside the fixed rotating chamber 515 is driven by the drive box 517 and is driven by a chain and sprocket to facilitate the uniform shaking of the acetylene cylinder 112. The drive group adopts a two-gear joint drive method, with the fifth drive motor 519 driving the drive gear 518, and the drive gear 518 driving the drive gear 516 on the connecting shaft 526 to rotate, thereby realizing the rotation angle of the fixed rotating chamber 515.

[0074] It should be noted that the second idler roller 505 is connected to the fourth fixed bracket 501 through the idler roller fixing seat 527. In order to increase the pressure bearing capacity, the bottom of the idler roller fixing seat 527 is connected to one side of the fourth fixed bracket 501 through the third connecting rod 528 and the connecting buckle 529 to increase its structural strength. The purpose of this design is to avoid interference with the material feeding frame 525 at the rectangular opening of the fourth fixed bracket 501. Normally, the actuating rod on the upper part of the material feeding frame 525 is located in the gap between the two idler roller fixing seats 527. When the fixed rotating chamber 515 turns, it can lift the upper acetylene cylinder 112 and place it against the rotating roller 520 inside the fixed rotating chamber 515, thereby realizing automated shaking and transportation.

[0075] A process for preparing a mixed gas for cutting and welding, wherein the mass ratio of the components is: dimethylformamide 1%, ethanol 5%, propane 32%, acetylene 60%, and synergistic additive 2%, and the process for preparing the mixed gas includes the following steps:

[0076] S1. Dimethylformamide filling: Place the acetylene cylinder 112 on the first conveying platform 208 of the first carrying platform 206, and open the first control valve 109 to introduce the dimethylformamide in the first storage tank 102 into the first gas delivery pipe 106, and fill it into the acetylene cylinder 112 through the gas filling pipe.

[0077] S2. Ethanol filling: Close the first control valve 109 and open the second control valve 108 to introduce the ethanol in the second storage tank 103 into the first gas pipeline 106, and fill it into the acetylene cylinder 112 through the gas filling pipeline.

[0078] S3. Propane gas filling: Close the second control valve 108 and open the third control valve 113 to introduce the propane gas in the third storage tank 104 into the first gas guide pipe 106, and fill it into the acetylene cylinder 112 through the gas filling pipe and pressurize it.

[0079] S4. Acetylene gas filling: Close the third control valve 113 and open the fourth control valve 114 to introduce the acetylene gas in the fourth storage tank 105 into the first gas guide pipe 106, and fill it into the acetylene cylinder 112 through the filling pipe and pressurize it.

[0080] S5. Additive filling: Close the fourth control valve 114, open the fifth control valve 117 to introduce the additive in the fifth storage tank 115 into the first gas guide pipe 106, fill it into the acetylene cylinder 112 through the gas filling pipe, and pressurize it.

[0081] S6. Shake evenly: Shake the acetylene cylinder 112 that has been filled in step S5 evenly, and mix it evenly through the shaking unit.

[0082] In step S1, the weight of the acetylene cylinder 112 and the weight after dimethylformamide is introduced are recorded by the weighing device built into the first loading platform 206. After the filling weight reaches the requirement, the first control valve 109 is closed.

[0083] In step S2, the weight of the ethanol filling is recorded by the weighing device built into the first loading platform 206, and the second control valve 108 is closed after the filling requirement is met.

[0084] In step S3, when propane gas is introduced for filling, the pressure is 0.5 MPa and the filling amount is 0.5 kg.

[0085] In step S4, when acetylene gas is introduced for filling, the pressurization pressure is 2.25 MPa and the filling amount is 2.7 kg.

[0086] In step S6, the shaking time is 17 minutes and the shaking speed is 55 revolutions per minute.

[0087] In steps S1-S5, when one valve is opened, all other valves are closed.

[0088] It should be noted that in the preparation process, dimethylformamide is first filled into acetylene cylinder 112. Dimethylformamide is a high-quality acetylene solvent widely used in many organic synthesis processes, such as catalyst synthesis, intermediate synthesis, and multiple reaction systems. In this technical solution, the solvent of acetylene gas can quickly mix with the filled gas. After dimethylformamide is filled into acetylene cylinder 112, it is mixed with subsequently added acetylene. The acetylene is then precisely dissolved in ethanol because they have good hydrophilic and hydrophobic properties, allowing them to stabilize each other and enabling the substances in the solvent system to form a stable chemical saturation. Subsequently, propane gas is added to acetylene cylinder 112 and mixed with it. The filling is controlled by pressurization and weighing. The mixed cutting gas obtained by mixing propane gas, acetylene, ethanol, and synergistic additives is as follows:

[0089] Acetylene gas using acetone as a solvent costs 90 yuan per bottle. Normally, one 5kg bottle of acetylene requires three bottles of oxygen. However, one 13.5kg bottle of propane requires four to five bottles of oxygen, and its cost is only about 80% higher than acetylene. Calculations show that...

[0090] One kilogram of acetylene requires the gas production of 3.3 kilograms of calcium carbide. If the price of calcium carbide is 5.50 yuan / kg, then one kilogram of acetylene costs 18.15 yuan, and five kilograms of acetylene costs 90.75 yuan. The price of propane is 6.0 yuan / kg. If each acetylene cylinder (112) is filled with 0.5 kg of propane, 3 kg of acetylene, 0.05 kg of ethanol, and 0.0005 kg of additive, then each cylinder costs 60 yuan. Therefore, the cost of this welding gas is 34% lower than that of one cylinder of acetylene gas for the same mass.

[0091] The specific analysis is as follows:

[0092] Economic Analysis Comparison Table

[0093]

[0094] In summary, filling dimethylformamide solvent cylinders with the prepared "mixed gas" is safer and more cost-effective than using acetylene cylinder 112 with acetone solvent. It is an ideal gas for use in the future, ensuring safety, reliability, stable quality, energy saving, and environmental protection. It is a highly efficient mixed gas for cutting and welding and has significant economic value.

[0095] It should be noted that dimethylformamide solvent cylinders and acetylene cylinders 112 can be selected for use as needed.

[0096] It should be further explained that acetone has been commonly used for dissolving acetylene gas cylinders for many years. It is volatile and easily carries away with acetylene. Each use results in a loss of 0.45 kg, and about 3 kg needs to be added every 4 uses, which is very wasteful and increases the cost of acetylene gas. In addition, acetone is a hazardous chemical managed as "precursor chemicals", and its procurement and management are very complicated, with very high safety risks. The cost of filling dissolved acetylene gas is also very high.

[0097] The dimethylformamide solvent gas cylinder used in this invention is prepared and filled with an optimal solvent based on the physicochemical properties of the solvent using a mixed gas. Its characteristics are that it is not easily volatile, and the dimethylformamide in the gas cylinder will not be carried away by the gas during use. Each addition can be used for 3 years of replenishment, which is very economical in terms of usage costs and has relatively low safety risks. It is a preferred choice for this gas solvent.

[0098] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A mixed gas preparation device for cutting and welding, comprising a gas inlet (1), a gas filling section (2), a transfer section (3), and a conveying section (4), characterized in that: The gas inlet (1) fills different types of gas into the acetylene cylinder (112) on the gas filling section (2) through the first gas inlet pipe (106); The gas filling section (2) is arranged on both sides of the gas inlet section (1), and the discharge end of the gas filling section (2) is connected to another gas filling section through the transfer section (3) to form a ring structure. The gas inlet section (1) is provided with a first conveying mechanism for transporting acetylene cylinders (112). The transfer unit (3) is equipped with a second conveying mechanism and a material handling mechanism to transfer the acetylene cylinder (112) to another set of gas filling units, and cooperate with the gas inlet unit (1) to fill different gases in sequence; The conveying unit (4) is located on one side of the transfer unit (3) to transfer the filled acetylene cylinder (112) to the shaking unit for shaking and collection. The equalizing unit includes an equalizing mechanism and a stepping conveying mechanism. The stepping conveying mechanism includes a fourth fixed support (501), a second idler roller (505), a drive platform (502), a sliding bar (503), a third screw (504), a moving table (514), and a propulsion mechanism. The fourth fixed support (501) is provided with a plurality of second idler rollers (505) inside, and a drive platform (502) is provided on one side of the fourth fixed support (501). A sliding bar (503) and a third screw (504) are provided on the upper part of the drive platform (502). The moving platform (514) is connected to the sliding bar (503) and the third screw (504) on the drive platform (502) through the third sliding groove and the third screw hole at the bottom, respectively. The upper part of the moving platform (514) is provided with a propulsion mechanism, which includes a propulsion plate (509), a second pneumatic cylinder (508), a push rod (510) and a propeller (511). One end of the drive platform (502) is provided with a second pneumatic cylinder (508), and the output shaft of the second pneumatic cylinder (508) is connected to the propulsion plate (509). The propulsion plate (509) is connected to the push rod (510) through a connector. The upper part of the push rod (510) is provided with a plurality of propellers (511). The middle part of the propeller (511) is provided with a semi-circular opening, and the interior of the semi-circular opening is provided with a rubber pad layer. The fourth fixed bracket (501) has a rectangular opening on one side, and a shaking mechanism is provided inside the rectangular opening to shake the gas in the acetylene cylinder (112). The shaking mechanism includes a fifth fixed bracket (506), a fixed rotating chamber (515), a drive box (517), a rotating roller (520), a feeding rack (525), and a drive group. The fixed rotating chamber (515) is a rectangular cavity structure with an opening on one side, and the two sides of the fixed rotating chamber (515) are movably connected to the connecting holes at the rectangular opening through connecting shafts (526). The fixed rotating chamber (515) has several rotating rollers (520) inside, and one end of the rotating roller (520) is connected to the drive box (517) at the top. A material feeding frame (525) is provided on one side of the fixed rotating chamber (515). Several actuating rods are provided on the upper part of the material feeding frame (525), and the actuating rods are respectively provided at the gaps formed by the two second rollers (505).

2. The apparatus for preparing a mixed gas for cutting and welding according to claim 1, characterized in that: The gas inlet section (1) includes a first storage tank (102), a second storage tank (103), a third storage tank (104), a fourth storage tank (105), and a fifth storage tank (115) disposed on the upper part of the first fixed bracket (101). The second storage tank (103) is connected to the first gas guide pipe (106) through the second gas guide pipe (107), and one end of the first gas guide pipe (106) is connected to the first storage tank (102) through the fifth gas guide pipe. The fifth storage tank (115) is connected to the first gas guide pipe (106) through the sixth gas guide pipe (116). The first gas guide pipe (106) is connected to the third storage tank (104) and the fourth storage tank (105) through the third gas guide pipe and the fourth gas guide pipe respectively, and the third gas guide pipe and the fourth gas guide pipe are provided with a third control valve (113) and a fourth control valve (114) at the upper part; the fifth gas guide pipe is provided with a first control valve (109) at the upper part, the second gas guide pipe (107) is provided with a second control valve (108) at the upper part, and the sixth gas guide pipe (116) is provided with a fifth control valve (117) at the upper part. The upper part of the first gas-conducting pipe (106) is provided with several gas-filling pipes, and the gas-filling pipes are connected to the acetylene cylinder (112). The upper part of the gas-filling pipes is provided with a sixth control valve (110) and a pressure gauge (111) for controlling the gas flow of the gas-filling pipes.

3. The apparatus for preparing a mixed gas for cutting and welding according to claim 1, characterized in that: The first conveying mechanism includes a first transport trough (201), a first sprocket, a first chain (203), a metal sheet (202), a first drive motor (204), and a clamping and conveying mechanism. The first transport trough (201) is equipped with a first sprocket, and the first sprocket is connected to another sprocket through the first chain (203) to form a closed loop structure. The first sprocket is connected to the first drive motor (204) through a rotating shaft. The first transport trough (201) is equipped with a metal sheet (202) and a clamping and conveying mechanism.

4. The apparatus for preparing a mixed gas for cutting and welding according to claim 3, characterized in that: The clamping and conveying mechanism includes a first loading platform (206), a transfer trough (207), a first conveyor belt, and clamping components. The upper part of the first loading platform (206) is provided with the transfer trough (207), and the interior of the transfer trough (207) is provided with a first conveying platform (208). Clamping components are symmetrically arranged on both sides of the transfer trough (207).

5. The apparatus for preparing a mixed gas for cutting and welding according to claim 4, characterized in that: The clamping assembly includes a first support frame (209), a push rod (214), a first screw (218), a lifting support (219), a connecting rod (220), and a clamping limiting ring (213). The first screw (218) is mounted on the first support frame (209) via a bearing seat, and two lifting supports (219) are symmetrically arranged on the upper part of the first screw (218). The lifting supports (219) are connected to a connecting block (216) on one end of the push rod (214) via the connecting rod (220), and a clamping limiting ring (213) is provided on the other end of the push rod (214). The connecting block (216) is connected to the first slide groove (215) on the first support frame (209) through the first sliders on both sides, forming a sliding propulsion structure; The upper part of the first support frame (209) is provided with a second drive motor (221), and the second drive motor (221) is connected to the first screw (218) through a coupling. The first loading platform (206) under the second drive motor (221) is provided with a control console, a battery and a power collection mechanism. The power collection mechanism includes a first telescopic rod (210) provided at the bottom of the first loading platform (206), and a first pressure spring (211) is provided on the outside of the first telescopic rod (210) to form an elastic structure. One end of the first telescopic rod (210) is provided with a rotating ball (212), and the rotating ball (212) is connected to the metal sheet (202) inside the first transport trough (201) to collect the power on the metal sheet (202).

6. The apparatus for preparing a mixed gas for cutting and welding according to claim 1, characterized in that: The second conveying mechanism includes a second fixed bracket (301), a second slide groove (302), a second screw (303), a sliding platform (304), and a third drive motor (305). The sliding platform (304) is connected to the second slide groove (302) and the second screw (303) on the second fixed bracket (301) through the lower second slider (308) and nut (309), respectively. One end of the second screw (303) is connected to the third drive motor (305) through a coupling. The sliding platform (304) is connected to the material feeding mechanism via the first connecting rod (307). The material feeding mechanism includes a second loading platform (310), a guide groove (311), a first idler roller (312), a push plate (313), and a first pneumatic cylinder (314). The second loading platform (310) has guide grooves (311) symmetrically arranged inside, and a plurality of first idler rollers (312) are arranged inside the guide grooves (311). The second loading platform (310) is provided with a first pneumatic cylinder (314) at one end, and a push plate (313) is provided on the output shaft of the first pneumatic cylinder (314).

7. The apparatus for preparing a mixed gas for cutting and welding according to claim 1, characterized in that: The conveying unit (4) includes a third fixed support (401), a second conveying trough (402), a second conveyor belt (403), and a protective mechanism. The upper part of the third fixed support (401) is provided with the second conveying trough (402), and the inlet of the second conveying trough (402) is connected to the second fixed support (301). The second conveyor belt (403) is provided inside the second conveying trough (402). Several protective mechanisms are provided on the upper part of the second conveying trough (402). The protective mechanism includes a fixed support (404), a second connecting rod (406), a second pressure spring (405), a connecting plate (407), and an auxiliary rotating wheel (408). The connecting plate (407) is connected to the through hole on the fixed support (404) through the second connecting rod (406), and a second pressure spring (405) is provided on the outside of the second connecting rod (406). The two ends of the second pressure spring (405) are respectively connected to the fixed support (404) and the connecting plate (407) to form an elastic structure. An auxiliary rotating wheel (408) is provided on the support of the connecting plate (407), and the auxiliary rotating wheel (408) is a flexible rubber wheel.

8. The apparatus for preparing a mixed gas for cutting and welding according to claim 1, characterized in that: The drive box (517) is equipped with a second sprocket and a third sprocket connected to one end of the rotating roller (520), and the second sprocket and the third sprocket are connected to other rotating rollers (520) through a second chain (522) and a third chain (523). A fourth drive motor (524) is provided on the upper part of the drive box (517). The drive group is located at the connection between the fixed rotating chamber (515) and the fourth fixed bracket (501). The drive group includes a drive gear (516) located on the connecting shaft (526). The drive gear (516) meshes with a drive gear (518) on one side. One end of the drive gear (518) is connected to the fifth drive motor (519) on the motor support through a connector. The second idler roller (505) is disposed in the idler roller fixing seat (527), and one end of the idler roller fixing seat (527) is fixedly connected to the fourth fixing bracket (501) by screws. The lower part of the idler roller fixing seat (527) is connected to one side of the fourth fixing bracket (501) by the third connecting rod (528) and the connecting buckle (529).

9. The apparatus for preparing a mixed gas for cutting and welding according to claim 1, characterized in that, The mass ratio of each component in the mixed gas is as follows: dimethylformamide 0.5%-1%, ethanol 3%-6%, propane 30%-40%, acetylene 55%-65%, and synergistic additive 0.5%-1%. The preparation process of the mixed gas includes the following steps: S1. Dimethylformamide filling: Place the acetylene cylinder (112) on the first conveying platform (208) of the first loading platform (206), and open the first control valve (109) to introduce the dimethylformamide in the first storage tank (102) into the first gas delivery pipe (106), and fill it into the acetylene cylinder (112) through the gas filling pipe; S2. Ethanol filling: Close the first control valve (109), open the second control valve (108) to introduce the ethanol in the second storage tank (103) into the first gas delivery pipe (106), and fill it into the acetylene cylinder (112) through the gas filling pipe. S3. Propane gas filling: Close the second control valve (108), open the third control valve (113) to introduce the propane gas in the third storage tank (104) into the first gas guide pipe (106), fill it into the acetylene cylinder (112) through the gas filling pipe, and pressurize it. S4. Acetylene gas filling: Close the third control valve (113), open the fourth control valve (114) to introduce the acetylene gas in the fourth storage tank (105) into the first gas guide pipe (106), fill it into the acetylene cylinder (112) through the filling pipe, and pressurize it. S5. Filling the synergistic additive: Close the fourth control valve (114), open the fifth control valve (117) to introduce the synergistic additive in the fifth storage tank (115) into the first gas guide pipe (106), fill it into the acetylene cylinder (112) through the gas filling pipe, and pressurize it. S6. Shake evenly. Shake evenly the acetylene cylinder (112) that has been filled in step S5, and mix it evenly through the shaking unit. In step S1, the weight of the acetylene cylinder (112) and the weight after dimethylformamide is introduced are recorded by the weighing device of the first loading platform (206). After the filling weight reaches the requirement, the first control valve (109) is closed. In step S2, the weight of the ethanol filling is recorded by the weighing device on the first loading platform (206), and the second control valve (108) is closed after the filling reaches the required level. In step S3, when propane gas is introduced for filling, the pressure is 0.35MPa-0.8MPa, and the filling amount is 0.4kg-0.6kg. In step S4, when acetylene gas is introduced for filling, the pressurization pressure is 2.2MPa-2.3MPa, and the filling amount is 2.5kg-3.2kg. In step S6, the shaking time is 15-20 minutes, and the shaking speed is 50-60 rpm. In steps S1-S5, when one valve is opened, all other valves are closed.

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