Device for accurately preparing mixed gas

Abstract

The invention belongs to the technical field of gas mixing, and particularly relates to an accurate mixed gas preparation device which comprises a base, a mixing tank and a gas mixing assembly installed in an inner cavity of the mixing tank, a supporting frame is inserted into the upper end face of the base, the upper end of the supporting frame is fixedly connected with the mixing tank, and a communication opening is formed in the lower end of the mixing tank. A plurality of extraction openings are formed in the upper end of the mixing tank, and air guide pipes are inserted into inner cavities of the extraction openings in the upper end of the mixing tank; the problems that various gases are poured into a mixing tank according to a certain proportion, then the mixing tank is sealed to prevent gas leakage, meanwhile, a motor is used for driving a transmission shaft to drive gas mixing blades to rotate, and then the various gases in the mixing tank are stirred and mixed are solved, so that the mixing mode is low in efficiency and high in mixing efficiency. And the processing efficiency of the mixed gas is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of gas mixing, in particular to a device for accurately preparing mixed gas. Background Art

[0002] In food safety, nitrogen and carbon dioxide are usually mixed, and the mixed gas is used to preserve fruits and vegetables, extend their shelf life and improve food quality. In fire safety, nitrogen, argon and carbon dioxide gases are usually used and mixed in a certain proportion through a mixing device, and then filled into tanks such as fire extinguisher bottles. This mixed fire extinguishing gas is suitable for various types of fires, especially in places where precision equipment needs to be protected or where high environmental requirements are required, and can effectively extinguish fire sources.

[0003] A patent with publication number CN105903393B discloses a mixed gas shaking device. This patent uses a motor to drive a mixed gas cylinder to rotate around a non-self-axis. At the same time, the speed and direction of the servo motor are automatically controlled through different control programs, so that the cylinder can perform up and down speed changes while rotating, so that the mixed gas is sufficiently stressed and the force changes continuously, thereby accelerating the diffusion of the gas and achieving a good shaking effect.

[0004] There are still some problems in the actual application of the above scheme. The above-mentioned existing technology injects multiple gases into the mixing tank, and then drives the mixing tank to rotate around a non-self-axis through a motor, while driving the mixing tank to make up and down speed changes, so that the multiple gases in the mixing tank are sufficiently stressed, and other forces will also continue to change, thereby accelerating the diffusion of the gas and enabling it to be quickly and evenly mixed. However, this mixed gas device is not able to realize the circulation, mixing and collection of the gas, so it is not only inefficient, but also greatly reduces the efficiency of the mixed gas processing.

[0005] To this end, the present invention provides a device for accurately preparing mixed gas. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: the device for accurately preparing mixed gas according to the present invention comprises a base, a mixing tank and a gas mixing assembly installed in the inner cavity of the mixing tank, the upper end surface of the base is plugged with a support frame, the upper end of the support frame is fixedly connected to the mixing tank, the lower end of the mixing tank is provided with a communication port, the upper end of the mixing tank is provided with multiple air extraction ports, and the upper end of the mixing tank is located in the inner cavity of the air extraction port and plugged with an air guide pipe;

[0008] The gas mixing assembly includes a mixing cylinder fixedly connected to the bottom of the inner cavity of the mixing tank, and the inner cavity of the mixing cylinder is connected to the communication port. The upper end of the mixing cylinder is provided with a sealing cover, and the lower end surface of the sealing cover is rotatably connected to a transmission shaft, and the outer surface of the transmission shaft is fixedly connected to a plurality of gas mixing impellers;

[0009] The upper end surface of the sealing cover is fixedly connected with a spring, and one end of the spring is fixedly connected to the inner wall of the mixing tank. The upper wall of the inner cavity of the mixing tank is fixedly connected with an air guide cover.

[0010] Preferably, a mounting block is installed inside the upper end of the mixing tank, a sliding column is fixedly connected to the lower end surface of the mounting block, the sliding column is slidably connected to the transmission shaft, and the outside of the sliding column is slidably connected to the sealing cover.

[0011] Preferably, one end of the air duct is fixedly connected to an exhaust assembly, and the exhaust assembly includes a first circular cover fixedly connected to one end of the air duct, a first motor is fixedly connected to the lower end face of the first circular cover, the output shaft of the first motor is located at one end of the inner cavity of the first circular cover and is fixedly connected to an exhaust impeller, and an air outlet is provided on the upper end face of the first circular cover.

[0012] Preferably, a second circular cover is installed in the inner cavity of the communicating port at the lower end of the mixing tank, a stirring blade is rotatably connected to the inner cavity of the second circular cover, and connectors are symmetrically provided at both ends of the second circular cover.

[0013] Preferably, two brackets are fixedly connected to both sides of the upper end surface of the base, and a first gas storage tank and a second gas storage tank are installed on the upper end of each bracket, and a first air inlet and a second air inlet are opened on the upper end of the first gas storage tank and the second gas storage tank.

[0014] Preferably, a partition plate is fixedly connected to the inner cavity of the first gas storage tank, and the inner cavity of the first gas storage tank is divided into two cavities by the partition plate, and the two cavities are respectively connected to the first air inlet and the second air inlet, and the inner cavities of the first air inlet and the second air inlet are both provided with a one-way valve, and the inner cavity of the second gas storage tank is provided with two cavities in the same way.

[0015] Preferably, the lower ends of the first gas storage tank and the second gas storage tank are respectively fixedly connected with two diversion ducts, and a quantitative air extraction component is installed at one end of each diversion duct, one end of the quantitative air extraction component is fixedly connected to the connecting head, and two control valves are arranged inside the diversion duct.

[0016] Preferably, the quantitative air extraction component includes a T-shaped catheter fixedly connected to one end of the diversion catheter, one end of the T-shaped catheter is fixedly connected to the connector, the inner cavity of the T-shaped catheter is fixedly connected to a second fixing frame, one side of the T-shaped catheter is fixedly connected to a mesh cover, the mesh cover is rotatably connected to a screw rod, and the screw rod is located at one end of the inner cavity of the T-shaped catheter and is rotatably connected to the second fixing frame, and the outer thread of the screw rod is connected to a piston.

[0017] Preferably, the inner cavity of the T-shaped catheter is fixed with a first fixing frame, a T-shaped sliding column is slidably connected inside the first fixing frame, and a rubber sealing gasket is provided on the outside of the T-shaped sliding column, and the T-shaped sliding column uses the rubber sealing gasket to seal one end of the inner cavity of the T-shaped catheter, a micro spring is fixed to one side of the first fixing frame, and one end of the micro spring is fixed to the T-shaped sliding column, an annular rubber ring is fixed to one side of the inner cavity of the T-shaped catheter, and a one-way valve is rotatably connected to the inner cavity of the annular rubber ring.

[0018] Preferably, the upper end surface of the base is fixedly connected to a first bracket, a second motor is installed in the inner cavity of the first bracket, the output shaft end of the second motor is fixedly connected to a bevel gear set, and a rotating shaft is fixed inside the bevel gear set, two second brackets are fixedly connected to the upper end surface of the base, and the rotating shaft is rotatably connected to the second bracket, both ends of the rotating shaft are fixedly connected to a first bevel gear, the first bevel gear is meshed with the second bevel gear, and the second bevel gear is fixed to the screw rod.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The device for accurately preparing mixed gases described in the present invention injects nitrogen and carbon dioxide into a mixing cylinder through a connecting port, and causes the nitrogen and carbon dioxide to impact a gas mixing assembly to rotate, which drives the nitrogen and carbon dioxide to stir in a vortex shape, so that the nitrogen and carbon dioxide are evenly distributed in the mixing cylinder, and the vortex-like rotation can increase the kinetic energy of the gas, so that the nitrogen and carbon dioxide can be mixed more evenly, and at the same time increase the pressure in the inner cavity of the mixing cylinder. After the gas reaches a certain pressure in the inner cavity of the mixing cylinder, the mixed gas will lift the sealing cover and move upward, and then the gas will flow into the inner cavity of the mixing tank for storage, thereby solving the problem of injecting multiple gases into the mixing tank according to a certain proportion, and then sealing the mixing tank to prevent gas leakage, and using a motor to drive the transmission shaft to drive the gas mixing blade to rotate, and then stirring and mixing the multiple gases in the mixing tank. However, this mixing method is not only inefficient, but also greatly reduces the efficiency of mixed gas processing.

[0021] 2. The device for accurately preparing mixed gases according to the present invention starts a second motor to drive a bevel gear set to rotate, and the bevel gear set drives a screw to rotate, which in turn drives a threaded piston to reciprocate in the inner cavity of the T-shaped tube. During the reciprocating operation of the piston, the air in the inner cavity of the T-shaped tube is pumped to form a negative pressure. At the same time, the negative pressure is used to suck the T-shaped slide column to open the T-shaped tube, extracting nitrogen or carbon dioxide into the inner cavity of the T-shaped tube. Then, when the piston is driven to reciprocate, the nitrogen or carbon dioxide in the inner cavity of the T-shaped tube is squeezed to form a positive pressure. Then, the nitrogen or carbon dioxide is squeezed through the one-way valve to open the T-shaped tube and discharged into the inner cavity of the second circular cover. This solves the problem that the existing device for accurately preparing mixed gases usually fills multiple gases into a mixing tank and then stirs and mixes the multiple gases in the mixing tank. However, if multiple gases are poured into the mixing tank for mixing while the multiple mixed gases in the mixing tank are extracted and packaged, the amount of gas discharged into the mixing tank cannot be accurately controlled, resulting in uneven gas mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic structural diagram of the main view of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the rear-view stereo of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a half-section mixing tank of the present invention;

[0026] Figure 4 This is a schematic diagram of the overall structure of the gas mixing impeller installation of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a half-section of the sealing cover of the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the second circular cover in a half-section according to the present invention;

[0029] Figure 7 This is a schematic diagram of the internal structure of the second gas storage tank in a half-section according to the present invention;

[0030] Figure 8 This is a schematic diagram of the internal structure of a half-section T-shaped catheter of the present invention;

[0031] In the figure: 1, base; 2, support frame; 3, mixing tank; 4, first gas storage tank; 5, second gas storage tank; 6, diversion duct; 7, quantitative extraction assembly;

[0032] 71. T-shaped guide tube; 72. First fixing bracket; 73. Micro spring; 74. T-shaped slide column; 75. Second fixing bracket; 76. Piston; 77. Screw rod; 78. Annular rubber ring; 79. One-way valve;

[0033] 8. Bracket; 9. Air guide tube; 10. Mounting block;

[0034] 11. Air extraction assembly; 111. First circular cover; 112. Air outlet; 113. Air extraction impeller;

[0035] 12. First motor; 13. First air inlet; 14. Second air inlet; 15. Second motor; 16. First bracket; 17. Second bracket; 18. Rotating shaft; 19. First bevel gear; 20. Second bevel gear; 21. Mesh cover; 22. Mixing cylinder; 23. Air guide cover; 24. Sliding column; 25. Spring; 26. Sealing cover; 27. Mixing impeller; 28. Transmission shaft; 29. ​​Connecting port; 30. Air extraction port; 31. Second circular cover; 32. Stirring blades; 33. Connector; 34. Partition plate; 35. Bevel gear set; DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] Example 1

[0038] like Figures 1 to 8 As shown, a device for accurately preparing mixed gases according to an embodiment of the present invention comprises a base 1, a mixing tank 3, and a gas mixing assembly installed in the inner cavity of the mixing tank 3. A support frame 2 is plugged into the upper end surface of the base 1, and the upper end of the support frame 2 is fixedly connected to the mixing tank 3. A communication port 29 is provided at the lower end of the mixing tank 3, and a plurality of air extraction ports 30 are provided at the upper end of the mixing tank 3. An air guide pipe 9 is plugged into and installed in the inner cavity of the air extraction port 30 at the upper end of the mixing tank 3.

[0039] The gas mixing assembly includes a mixing cylinder 22 fixedly connected to the bottom of the inner cavity of the mixing tank 3, and the inner cavity of the mixing cylinder 22 is connected to the communication port 29. A sealing cover 26 is provided on the upper end of the mixing cylinder 22, and a transmission shaft 28 is rotatably connected to the lower end surface of the sealing cover 26. A plurality of mixing impellers 27 are fixed to the outside of the transmission shaft 28.

[0040] The upper end surface of the sealing cover 26 is fixedly connected with a spring 25 , and one end of the spring 25 is fixedly connected to the inner wall of the mixing tank 3 . The upper wall of the inner cavity of the mixing tank 3 is fixedly connected with an air guide cover 23 .

[0041] Specifically, in the prior art, multiple gases are poured into a mixing tank in a certain proportion, and then the mixing tank is sealed to prevent gas leakage. At the same time, a motor is used to drive a transmission shaft to rotate a gas mixing blade, thereby stirring and mixing the multiple gases in the mixing tank. However, this mixing method cannot achieve the problem of circulating, mixing and collecting the gases, which is not only inefficient, but also greatly reduces the efficiency of mixed gas processing.

[0042] The present invention injects nitrogen and carbon dioxide into the mixing barrel 22 through the communication port 29, and allows the nitrogen and carbon dioxide to enter the inner cavity of the mixing barrel 22, and at the same time impacts the mixing impeller 27 to rotate. During the rotation of the mixing impeller 27, the nitrogen and carbon dioxide are stirred in a vortex shape, so that the nitrogen and carbon dioxide are evenly distributed in the mixing barrel 22. The vortex-like rotation can increase the kinetic energy of the gas, so that the nitrogen and carbon dioxide can be mixed more evenly, and at the same time increase the pressure of the nitrogen and carbon dioxide in the inner cavity of the mixing barrel 22. When a certain pressure is reached, the mixed gas will lift the sealing cover 26 and move it upward, and the sealing cover 26 will squeeze the spring 25 to open the mixing cylinder 22, so that the gas will flow into the inner cavity of the mixing tank 3, and then the gas in the inner cavity of the mixing tank 3 is extracted through the air duct 9 in conjunction with the exhaust port 30, so that the gas cooperates with the air duct 23 to flow in a U shape, and the gas will be further mixed during the U-shaped flow process, thereby realizing multiple mixing operations on the gas, improving the uniformity of the gas mixing, and then discharged and collected through the air duct 9, thereby solving the above-mentioned problem.

[0043] like Figure 1 、 Figures 3 to 5 As shown, a mounting block 10 is installed inside the upper end of the mixing tank 3, and a sliding column 24 is fixed to the lower end surface of the mounting block 10. The sliding column 24 is slidably connected to the transmission shaft 28, and the outside of the sliding column 24 is slidably connected to the sealing cover 26.

[0044] like Figures 1 to 3 As shown, one end of the air duct 9 is fixedly connected to an exhaust assembly 11, and the exhaust assembly 11 includes a first circular cover 111 fixedly connected to one end of the air duct 9, the lower end surface of the first circular cover 111 is fixedly connected to a first motor 12, the output shaft of the first motor 12 is located at one end of the inner cavity of the first circular cover 111 and is fixedly connected to an exhaust impeller 113, and the upper end surface of the first circular cover 111 is provided with an air outlet 112.

[0045] Specifically, when the mixed gas is extracted, the external extraction pipe is connected to the gas outlet 112 and installed, and then the first motor 12 is started to drive the extraction impeller 113 to rotate. During the rotation of the extraction impeller 113, the mixed gas in the inner cavity of the mixing tank 3 is extracted through the air guide pipe 9, and the gas enters the inner cavity of the first circular cover 111. During the rotation of the extraction impeller 113, the mixed gas rotates in a vortex manner, and a plurality of air guide pipes 9 are provided, so that multiple streams of gas can be extracted into the inner cavity of the first circular cover 111 at the same time. The multiple streams of gas entering the inner cavity of the first circular cover 111 will be discharged into the extraction impeller 113. The mixed gas is mixed again under the rotation of 113 and then discharged through the gas outlet 112. At the same time, the mixed gas is collected in conjunction with the extraction pipe, thereby solving the problem that the existing precise preparation of mixed gas devices usually injects multiple gases into the mixing tank, and then stirs and mixes the multiple gases in the mixing tank, and the mixed gas is filled into the fire extinguisher bottle through the conduit and the booster pump for packaging. However, since the mixed gas in the mixing tank is not stirred during the process of filling the fire extinguisher bottle, the flow of the gas is affected by the shape of the pipeline, the flow rate and the pressure difference, resulting in uneven mixing of the gas again.

[0046] like Figure 1 、 Figure 3 and Figure 8 As shown, a second circular cover 31 is installed in the inner cavity of the communication port 29 at the lower end of the mixing tank 3. A stirring blade 32 is rotatably connected to the inner cavity of the second circular cover 31. Connectors 33 are symmetrically provided at both ends of the second circular cover 31.

[0047] like Figure 3 、 Figure 7 and Figure 8 As shown, two brackets 8 are fixedly connected to both sides of the upper end surface of the base 1, and a first gas storage tank 4 and a second gas storage tank 5 are installed on the upper end of each bracket 8. The upper ends of the first gas storage tank 4 and the second gas storage tank 5 are both provided with a first air inlet 13 and a second air inlet 14.

[0048] like Figure 3 、 Figure 7 and Figure 8 As shown, a partition plate 34 is fixedly connected to the inner cavity of the first gas storage tank 4, and the inner cavity of the first gas storage tank 4 is divided into two cavities by the partition plate 34, and the two cavities are respectively connected to the first air inlet 13 and the second air inlet 14, and the inner cavities of the first air inlet 13 and the second air inlet 14 are both provided with a one-way valve, and the inner cavity of the second gas storage tank 5 is provided with two cavities in the same way.

[0049] Specifically, when mixing and preparing the gases used in food safety, nitrogen is poured into a cavity in the first gas storage tank 4 for storage, and carbon dioxide is poured into a cavity in the second gas storage tank 5 for storage. Then, the diversion conduit 6 is opened by using a control valve, so that the nitrogen in the first gas storage tank 4 and the carbon dioxide in the second gas storage tank 5 are discharged into the second circular cover 31 through the connector 33, so that the nitrogen and carbon dioxide are filled into the second circular cover 31 through the connector 33, and the nitrogen and carbon dioxide impact the stirring blade 32 to rotate. During the rotation process, the stirring blade 32 will drive the nitrogen and carbon dioxide filled into the second circular cover 31 to stir and mix. The nitrogen and carbon dioxide after the initial stirring and mixing will be discharged into the mixing tank 3 for pressurized mixing, thereby improving the efficiency of the mixed preparation of gases used in food safety and preventing the trouble of nitrogen and carbon dioxide needing to be stirred and pressurized for a long time in the mixing tank 3 to achieve uniform mixing when mixing.

[0050] Example 2

[0051] like Figure 1 、 Figure 6 and Figure 8 As shown, the lower ends of the first gas storage tank 4 and the second gas storage tank 5 are respectively fixedly connected with two diversion ducts 6, and a quantitative air extraction component 7 is installed at one end of each diversion duct 6, and one end of the quantitative air extraction component 7 is fixedly connected to the connecting head 33, and two control valves are arranged inside the diversion duct 6.

[0052] like Figure 1 、 Figure 6 and Figure 8 As shown, the quantitative air extraction component 7 includes a T-shaped tube 71 fixedly connected to one end of the diversion tube 6, one end of the T-shaped tube 71 is fixedly connected to the connector 33, the inner cavity of the T-shaped tube 71 is fixedly connected to a second fixing frame 75, one side of the T-shaped tube 71 is fixedly connected to a mesh cover 21, the mesh cover 21 is rotatably connected to a screw rod 77 inside, and the screw rod 77 is located at one end of the inner cavity of the T-shaped tube 71 and is rotatably connected to the second fixing frame 75, and the outer thread of the screw rod 77 is threadedly connected to a piston 76.

[0053] like Figure 6 and Figure 8 As shown, the inner cavity of the T-shaped catheter 71 is fixedly connected to a first fixing frame 72, and a T-shaped slide column 74 is slidably connected inside the first fixing frame 72, and a rubber sealing gasket is provided on the outside of the T-shaped slide column 74, and the T-shaped slide column 74 uses the rubber sealing gasket to seal one end of the inner cavity of the T-shaped catheter 71, a micro spring 73 is fixedly connected to one side of the first fixing frame 72, and one end of the micro spring 73 is fixedly connected to the T-shaped slide column 74, an annular rubber ring 78 is fixedly connected to one side of the inner cavity of the T-shaped catheter 71, and a one-way valve 79 is rotatably connected to the inner cavity of the annular rubber ring 78.

[0054] like Figure 2、 Figure 6 and Figure 8 As shown, the upper end surface of the base 1 is fixedly connected to a first bracket 16, the inner cavity of the first bracket 16 is installed with a second motor 15, the output shaft end of the second motor 15 is fixedly connected to a bevel gear set 35, and the interior of the bevel gear set 35 is fixedly connected to a rotating shaft 18, the upper end surface of the base 1 is fixedly connected to two second brackets 17, and the rotating shaft 18 is rotatably connected to the second bracket 17, both ends of the rotating shaft 18 are fixedly connected to a first bevel gear 19, the first bevel gear 19 is meshedly connected to the second bevel gear 20, and the second bevel gear 20 is fixedly connected to the screw rod 77.

[0055] Specifically, when mixing and preparing the gas used in food safety, the second motor 15 is started to drive the bevel gear set 35 to rotate, and the bevel gear set 35 drives the rotating shaft 18 to rotate, and at the same time drives the two first bevel gears 19 to rotate. During the rotation process, the first bevel gear 19 will engage and drive the second bevel gear 20 to rotate, and then drive the screw rod 77 to rotate. During the rotation process, the screw rod 77 will thread the piston 76 to move back and forth in the inner cavity of the T-tube 71, and then during the reciprocating operation of the piston 76, the air in the inner cavity of the T-tube 71 is pumped, so that the inner cavity of the T-tube 71 forms a negative pressure, and then the negative pressure is used to suck the T-type slide column 74 to open the T-tube 71, extracting nitrogen or carbon dioxide into the inner cavity of the T-tube 71, and then driving the piston 76 to reciprocate, squeezing the nitrogen or carbon dioxide in the inner cavity of the T-tube 71. , so that a positive pressure is formed in the inner cavity of the T-shaped tube 71, and then the nitrogen or carbon dioxide squeezes the one-way valve 79 to open the T-shaped tube 71 and discharge into the inner cavity of the second circular cover 31, thereby realizing the injection of nitrogen and carbon dioxide into the mixing tank 3 in an appropriate amount, and by changing the operation process of the piston 76, the amount of nitrogen or carbon dioxide extracted into the T-shaped tube 71 can be controlled, and then the amount discharged into the mixing tank 3 can be controlled, thereby improving the accuracy and quality of the mixed gas processing, thereby solving the problem that the existing precise preparation of mixed gas devices usually injects multiple gases into the mixing tank and then stirs and mixes the multiple gases in the mixing tank. However, if multiple gases are injected into the mixing tank for mixing while the multiple mixed gases in the mixing tank are extracted and packaged, it will lead to the inability to accurately control the amount of gas discharged into the mixing tank, resulting in uneven gas mixing.

[0056] Working principle: when mixing and preparing the gas used in food safety, the second motor 15 is started to drive the bevel gear set 35 to rotate, and the bevel gear set 35 drives the rotating shaft 18 to rotate, and at the same time drives the two first bevel gears 19 to rotate. During the rotation of the first bevel gear 19, it will mesh with the second bevel gear 20 to rotate, and then drive the screw rod 77 to rotate. During the rotation of the screw rod 77, it will thread the piston 76 to move back and forth in the inner cavity of the T-tube 71, and then during the reciprocating operation of the piston 76, the air in the inner cavity of the T-tube 71 is pumped, so that the inner cavity of the T-tube 71 forms a negative pressure, and then the negative pressure is used to suck the T-slide The column 74 opens the T-shaped tube 71, extracting nitrogen or carbon dioxide into the inner cavity of the T-shaped tube 71, and then drives the piston 76 to reciprocate, squeezing the nitrogen or carbon dioxide in the inner cavity of the T-shaped tube 71, so that a positive pressure is formed in the inner cavity of the T-shaped tube 71, and then the nitrogen or carbon dioxide squeezes the one-way valve 79 to open the T-shaped tube 71 and discharge into the inner cavity of the second circular cover 31, thereby achieving the injection of nitrogen and carbon dioxide into the mixing tank 3 in appropriate amounts. Moreover, by changing the operation process of the piston 76, the amount of nitrogen or carbon dioxide extracted into the T-shaped tube 71 can be controlled, and then the amount discharged into the mixing tank 3 can be controlled, thereby improving the accuracy and quality of the mixed gas processing;

[0057] Nitrogen and carbon dioxide are poured into the mixing barrel 22 through the communication port 29, and the nitrogen and carbon dioxide enter the inner cavity of the mixing barrel 22, and at the same time impact the mixing impeller 27 to rotate. During the rotation of the mixing impeller 27, the nitrogen and carbon dioxide are driven to stir in a vortex shape, so that the nitrogen and carbon dioxide are evenly distributed in the mixing barrel 22. The vortex-like rotation can increase the kinetic energy of the gas, so that the nitrogen and carbon dioxide can be mixed more evenly, and at the same time increase the pressure of the nitrogen and carbon dioxide in the inner cavity of the mixing barrel 22. After the gas reaches a certain pressure in the inner cavity of the mixing barrel 22, the mixed gas will push up the sealing cover 26 to move upward, and the sealing cover 26 squeezes the spring 25 to open the mixing barrel 22, thereby allowing the gas to flow into the inner cavity of the mixing tank 3;

[0058] When the mixed gas is extracted, an external extraction pipe is connected to the air outlet 112 and installed, and then the first motor 12 is started to drive the extraction impeller 113 to rotate. During the rotation of the extraction impeller 113, the mixed gas in the inner cavity of the mixing tank 3 is extracted through the air guide pipe 9, and the gas enters the inner cavity of the first circular cover 111. During the rotation of the extraction impeller 113, the mixed gas rotates in a vortex manner, and there are multiple air guide pipes 9, which can simultaneously extract multiple streams of gas into the inner cavity of the first circular cover 111. The multiple streams of gas entering the inner cavity of the first circular cover 111 will be mixed again under the rotation of the extraction impeller 113, and then discharged through the air outlet 112, and at the same time, the mixed gas is collected in conjunction with the extraction pipe.

[0059] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for accurately preparing mixed gases, comprising a base (1), a mixing tank (3), and a gas mixing assembly installed in the inner cavity of the mixing tank (3), characterized in that: The upper end surface of the base (1) is plugged with a support frame (2), the upper end of the support frame (2) is fixedly connected to the mixing tank (3), the lower end of the mixing tank (3) is provided with a communication port (29), the upper end of the mixing tank (3) is provided with a plurality of air extraction ports (30), and the upper end of the mixing tank (3) is located in the inner cavity of the air extraction port (30) and is plugged with an air guide pipe (9); The gas mixing assembly comprises a mixing cylinder (27) fixedly connected to the bottom of the inner cavity of the mixing tank (3), and the inner cavity of the mixing cylinder (27) is connected to the communication port (29); a sealing cover (26) is provided at the upper end of the mixing cylinder (27); a transmission shaft (28) is rotatably connected to the lower end surface of the sealing cover (26); and a plurality of mixing impellers (27) are fixedly connected to the outside of the transmission shaft (28); The upper end surface of the sealing cover (26) is fixedly connected to a spring (25), and one end of the spring (25) is fixedly connected to the inner wall of the mixing tank (3). The upper wall of the inner cavity of the mixing tank (3) is fixedly connected to an air guide cover (23).

2. The device for accurately preparing mixed gas according to claim 1, characterized in that: A mounting block (10) is installed inside the upper end of the mixing tank (3), a sliding column (24) is fixed to the lower end surface of the mounting block (10), the sliding column (24) is slidably connected to the transmission shaft (28), and the outside of the sliding column (24) is slidably connected to the sealing cover (26).

3. The device for accurately preparing mixed gas according to claim 1, characterized in that: One end of the air guide tube (9) is fixedly connected to an air extraction assembly (11), and the air extraction assembly (11) includes a first circular cover (111) fixedly connected to one end of the air guide tube (9), a first motor (12) is fixedly connected to the lower end surface of the first circular cover (111), an output shaft of the first motor (12) is located in the inner cavity of the first circular cover (111), and an air extraction impeller (113) is fixedly connected to one end thereof, and an air outlet (112) is provided on the upper end surface of the first circular cover (111).

4. The device for accurately preparing mixed gas according to claim 1, characterized in that: A second circular cover (31) is inserted and installed in the inner cavity of the communication port (29) at the lower end of the mixing tank (3); a stirring blade (32) is rotatably connected to the inner cavity of the second circular cover (31); and connectors (33) are symmetrically provided at both ends of the second circular cover (31).

5. The device for accurately preparing mixed gas according to claim 1, characterized in that: Two brackets (8) are fixedly connected to both sides of the upper end surface of the base (1), and a first gas storage tank (4) and a second gas storage tank (5) are installed on the upper end of each bracket (8), and a first air inlet (13) and a second air inlet (14) are opened on the upper end of the first gas storage tank (4) and the second gas storage tank (5).

6. The device for accurately preparing mixed gas according to claim 5, characterized in that: A partition plate (34) is fixedly connected to the inner cavity of the first gas storage tank (4), and the inner cavity of the first gas storage tank (4) is divided into two cavities by the partition plate (34), and the two cavities are respectively connected to the first gas inlet (13) and the second gas inlet (14), and the inner cavities of the first gas inlet (13) and the second gas inlet (14) are both provided with a one-way valve. The inner cavity of the second gas storage tank (5) is provided with two cavities in the same manner.

7. The device for accurately preparing mixed gas according to claim 6, characterized in that: The lower ends of the first gas storage tank (4) and the second gas storage tank (5) are respectively fixedly connected with two shunt conduits (6), and one end of each shunt conduit (6) is installed with a quantitative air extraction component (7), one end of the quantitative air extraction component (7) is fixedly connected with the connector (33), and two control valves are provided inside the shunt conduit (6).

8. The device for accurately preparing mixed gas according to claim 7, characterized in that: The quantitative air extraction component (7) comprises a T-shaped tube (71) fixedly connected to one end of the shunt tube (6), one end of the T-shaped tube (71) is fixedly connected to the connector (33), the inner cavity of the T-shaped tube (71) is fixedly connected to a second fixing frame (75), one side of the T-shaped tube (71) is fixedly connected to a mesh cover (21), the mesh cover (21) is internally rotatably connected to a screw rod (77), and the screw rod (77) is located at one end of the inner cavity of the T-shaped tube (71) and is rotatably connected to the second fixing frame (75), and the outer surface of the screw rod (77) is threadedly connected to a piston (76).

9. The device for accurately preparing mixed gas according to claim 8, characterized in that: The inner cavity of the T-shaped catheter (71) is fixedly connected to a first fixing frame (72), the inner cavity of the first fixing frame (72) is slidably connected to a T-shaped sliding column (74), and a rubber sealing gasket is provided on the outside of the T-shaped sliding column (74), and the T-shaped sliding column (74) uses the rubber sealing gasket to seal one end of the inner cavity of the T-shaped catheter (71), one side of the first fixing frame (72) is fixedly connected to a micro spring (73), and one end of the micro spring (73) is fixedly connected to the T-shaped sliding column (74), one side of the inner cavity of the T-shaped catheter (71) is fixedly connected to an annular rubber ring (78), and the inner cavity of the annular rubber ring (78) is rotatably connected to a one-way valve (79).

10. The device for accurately preparing mixed gas according to claim 1, characterized in that: The upper end surface of the base (1) is fixedly connected to a first bracket (16), the inner cavity of the first bracket (16) is equipped with a second motor (15), the output shaft end of the second motor (15) is fixedly connected to a bevel gear set (35), and the interior of the bevel gear set (35) is fixedly connected to a rotating shaft (18), the upper end surface of the base (1) is fixedly connected to two second brackets (17), and the rotating shaft (18) is rotatably connected to the second brackets (17), both ends of the rotating shaft (18) are fixedly connected to a first bevel gear (19), the first bevel gear (19) is meshedly connected to a second bevel gear (20), and the second bevel gear (20) is fixedly connected to a screw rod (77).

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