High-precision gas mixing device and method

Abstract

The invention discloses a high-precision gas mixing device and method, and relates to the technical field of gas mixing, the high-precision gas mixing device comprises a mixing bin, a compression assembly and a gas injection assembly, and the gas injection assembly comprises a driving motor, a rotating shaft, a partition plate, a primary mixing mechanism and a secondary mixing mechanism. The gas mixing device has the beneficial effects that gas is firstly conveyed into the compression cavity for retention and storage, so that the gas of the pressing block and the piston is compressed to a certain extent, the situation that the gas conveyed to the mixing bin has a bubble-like phenomenon in the conveying process, and consequently the metering of a flowmeter is inaccurate is avoided, and precise mixing of the gas is ensured; gas is subjected to turbulent flow mixing through the gas injection assembly, the mixing bin is divided into an upper mixing space and a lower mixing space through the partition plate, the gas is subjected to primary mixing through the primary mixing mechanism in the upper side space of the mixing bin, the gas is subjected to secondary mixing through the secondary mixing mechanism in the lower side space of the mixing bin, and the gas mixing effect is ensured through the two-time mixing mode; the condition that the mixed gas is layered is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas mixing, and in particular to a high-precision gas mixing device and method. Background Art

[0002] Gas blending refers to the process of mixing different types of gases in certain proportions and requirements to meet specific application needs. The mixing process has important applications in many fields, such as industrial production, automotive emission control, medical gases, and laboratory research.

[0003] For example, the patent with the authorization announcement number CN220715512U and the authorization announcement date of April 5, 2024, and the name of which is "A multi-gas mixing tank for mixed gas production", includes a mixing tank, the left and right sides of the top of the mixing tank are screwed with exhaust pumps, the output end of the lower surface of the exhaust pump is installed with one end of the exhaust pipe, and the other end of the exhaust pipe extends into the inner cavity of the mixing tank, the outer wall circumference of the exhaust pipe is provided with exhaust holes, the upper and lower ends of the inner cavity of the mixing tank are rotatably connected to the guide rod through bearings, the inner side of the guide rod is installed with a first gear, and the inner cavity of the mixing tank is rotatably connected to the second gear through a bearing. Blades are installed on the outside of the outer wall of the guide rod, and a first motor is connected to the center position of the bottom end of the inner cavity of the mixing tank by screws. The upper surface output end of the first motor is installed on one side of the guide rod, and a pressure gauge is installed on the left side of the mixing tank. The inner cavity of the pressure gauge is equipped with an infrared sensor. A shell is installed on the top of the mixing tank. The inner cavity of the shell is rotatably connected to a screw through a bearing. Top blocks are threaded on the left and right sides of the outer wall of the screw. The outer wall of the screw is interference fit with a third gear. The top end of the shell is screwed to the second motor, and the lower surface output end of the second motor extends into the inner cavity of the shell and is installed with a fourth gear that is meshed with the third gear. This patent uses the coordination between the guide rod, the first gear, the second gear and the first motor to drive the two blades to rotate in opposite directions at the same time, thereby accelerating the mixing of the gas. The coordination between the pressure gauge, the infrared sensor, the shell, the screw, the top block, the third gear, the second motor and the fourth gear can detect the pressure in the mixing tank and automatically control the switch in an emergency. The device uses a single motor to achieve gas mixing acceleration, which not only reduces the cost of use, but also has a low failure rate in the later stage. In addition, it can also automatically take emergency braking when the internal air pressure is abnormal, without the need for human operation. It is highly safe, flexible to use, and practical, meeting the use needs in the existing market.

[0004] Although the multi-gas mixing tank for mixed gas production can mix the gases, the gas in the mixture is disturbed only by two blades, and the short mixing time easily leads to insufficient gas mixing, and the mixed gas is stratified. In order to fully mix the gases, the operating time of the equipment can only be extended, resulting in high energy consumption and high production costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-precision gas mixing device and method to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A high-precision gas mixing device includes a mixing chamber, an exhaust pipe is provided on one side of the lower end of the mixing chamber, and a sealing valve is provided on the exhaust pipe. The mixing chamber is used to mix gases. Two compression assemblies are symmetrically provided on the outer side of the mixing chamber, each of which is used to place a single gas. An inflation assembly is provided at the upper end of the mixing chamber, and the inflation assembly is used to proportionally transport the gas in the compression assembly into the mixing chamber. A compression assembly, comprising a mounting frame, wherein two compression chambers are symmetrically arranged inside the mounting frame, a piston is slidably arranged in each compression chamber, the upper ends of the two compression chambers are connected by a first pipe, and the first pipe is connected to the air intake pipe, a second pipe is further provided at the upper ends of the two compression chambers, and the second pipe is connected to the inflation assembly through a connecting pipe, a buffer space is further provided in the mounting frame, a pressure block is slidably arranged in the buffer space, the lower end of the compression chamber is connected to the lower end of the buffer space, and sealing oil is provided between the two, and the sealing oil flows between the compression chamber and the buffer space through a valve; The jet assembly includes a drive motor, which is arranged in the middle of the upper end of the mixing bin. A rotating shaft is provided at the output end of the drive motor. A partition is provided in the middle of the rotating shaft in a rotatable manner. The partition is arranged in the middle of the inner side of the mixing bin. The partition separates the mixing bin into two upper and lower spaces. A primary mixing mechanism is provided on the upper outer side of the rotating shaft, and a secondary mixing mechanism is provided on the lower outer side of the rotating shaft.

[0007] As mentioned above, both the air inlet pipe and the connecting pipe are provided with a one-way valve, and the connecting pipe is also provided with a flow meter.

[0008] The above-mentioned inflation component includes two air compressors, which are symmetrically arranged at the upper end of the mixing bin, and each of the air compressors is connected to the second pipeline through a connecting pipe. An air supply pipe is provided at the lower end of each air compressor, and the air supply pipes are symmetrically arranged on the upper side of the interior of the mixing bin. Two horizontally arranged air outlet pipes are provided below the air supply pipes, and a plurality of air outlet holes are provided on the air outlet pipes along their length, and the diameter of the air outlet holes gradually decreases in the direction close to the wall of the mixing bin.

[0009] As mentioned above, the partition is wavy, and the waves on the partition form an annular cone, the flared opening of the annular cone faces the drive motor, and at least two circular holes are provided at the lower end of the partition, and the circular holes are provided at the lower end of the partition.

[0010] As mentioned above, the primary mixing mechanism includes a first fan, which is arranged at the upper end of the rotating shaft and at the upper end of the interior of the mixing bin. A plurality of support rods are evenly arranged along the circumference of the outer side of the rotating shaft. The support rods are arranged between the air outlet pipes, and each of the support rods is evenly arranged with a plurality of hollow hemispheres along its length.

[0011] As mentioned above, the secondary mixing mechanism includes at least two spiral jet tubes, a plurality of jet holes are evenly arranged on the spiral jet tubes, a vertical portion is provided at the upper end of the spiral jet tube, and the vertical portion is rotatably arranged in the circular hole of the partition, a driving gear is provided in the middle of the rotating shaft, and a driven gear is provided at the upper end of each of the spiral jet tubes, and each of the driven gears is meshed with the driving gear, and a second fan is provided at the lower end of the rotating shaft, and the rotation direction of the second fan is opposite to that of the first fan.

[0012] As mentioned above, both the driving gear and the driven gear are hollow gears.

[0013] As mentioned above, the secondary mixing mechanism also includes a support plate, which is arranged at the lower end inside the mixing bin, and the support plate is directly above the second fan. The support plate is provided with through holes with the same number as the spiral jet tubes, and a sliding block is provided on the outside of each through hole. The sliding block is arranged on the upper end of the support plate in a sliding manner, and the lower end of the spiral jet tube is arranged on the upper end of the sliding block.

[0014] As mentioned above, the secondary mixing mechanism further includes at least two annular arc plates, and the annular arc plates are arranged at the lower end of the partition.

[0015] A high-precision gas mixing method, which is applicable to the high-precision gas mixing device mentioned above, comprises the following steps: The first step: connecting the air inlet pipe to the gas cylinder containing the gas to be mixed, and an air pump is provided between the gas cylinder containing the gas to be mixed and the air inlet pipe, and connected to the external air pump through the exhaust pipe and opening the sealing valve, so that the air pump can extract the impurity gas in the mixing chamber, the compression chamber and the buffer space. After the impurity gas is extracted, the sealing valve is closed and the gas cylinder containing the gas to be mixed is opened, and the gas to be mixed is transported to the compression chamber through the air inlet pipe and the first pipeline by the air pump. At this time, the air compressor does not work, and the air pump continues to transport the gas to be mixed into the compression chamber, so that the gas to be mixed squeezes the piston, causing the piston to descend along the compression chamber, so that the compression chamber can accommodate more gas to be mixed. At this time, the piston squeezes the sealing oil, causing the sealing oil to enter the buffer space through the valve, and at the same time, the sealing The oil squeezes the pressing block, causing the pressing block to rise along the buffer space so that the buffer space can accommodate more of the sealing oil. When the piston moves to the bottom of the compression chamber, the air compressor is turned on and the air pump is turned off at the same time. In this way, the air compressor can transport the gas to be mixed in the compression chamber through the second pipe and the connecting pipe to the gas pipe. When the gas in the compression chamber is transported to the gas pipe, the pressure in the compression chamber decreases. At this time, the pressing block descends along the buffer space under the action of gravity. At this time, the sealing oil in the buffer space enters the compression chamber through the valve and lifts the piston. When the gas to be mixed passes through the connecting pipe, the flow meter measures the flow of the gas to be mixed entering the mixing bin. The feed amount of the mixed gas is accurately controlled through the compression chamber and the flow meter. The one-way valve is provided on the air inlet pipe and the connecting pipe to prevent the gas to be mixed from flowing back. Step 2: When the air compressor delivers the gas to be mixed to the gas delivery pipe, the gas delivery pipe delivers the gas to be mixed to the gas outlet pipe, so that the two gas outlet pipes spray the gas to be mixed to the mixing chamber through the gas outlet holes thereon. When the gas to be mixed enters the mixing chamber, the driving motor drives the rotating shaft to rotate, so that the rotating shaft drives the support rod to rotate, thereby causing the support rod to drive the multiple hollow hemispheres thereon to rotate, so that the hollow hemispheres deliver the gas to be mixed from one place to another, so as to improve the uniformity of gas mixing. , and when the gas to be mixed passes through the support rod and the hollow hemispherical turbulence to be mixed, the driving motor drives the first fan to rotate through the rotating shaft, so that the first fan blows the gas in the mixing process, and the first fan rotates and blows the mixed gas to hit the upper surface of the partition, ensuring that the gas is fully mixed once. At the same time, as the gas to be mixed continuously passes through the gas pipe into the upper space of the mixing bin, the amount of gas to be mixed in the mixing bin above the partition increases, and the pressure of the mixed gas in the upper space of the mixing bin gradually increases. At this time, the mixed gas in the upper space of the mixing bin enters the lower space of the mixing bin through the circular hole of the partition plate, and when the mixed gas enters the lower space of the mixing bin, the driving motor rotates through the rotating shaft, so that the rotating shaft drives the driving gear to rotate, thereby causing the driving gear to drive multiple driven gears to rotate simultaneously, so that the driven gear drives the spiral jet pipe connected thereto to rotate synchronously, and the spiral jet pipe during rotation sprays the first mixed gas through the jet hole into the lower space of the mixing bin, and the spiral jet pipe during rotation The spiral jet pipe disturbs the space below the mixing bin, so that the gas being mixed is evenly mixed. When the spiral jet pipe rotates, its lower end drives the sliding block to rotate and slide on the support plate, so that the sliding block supports and limits the spiral jet pipe. At the same time, the rotating shaft drives the second fan to rotate, so that the second fan disturbs the space below the mixing bin, and the second fan blows the mixed gas in the space below the mixing bin toward the annular curved plate, so that the gas being mixed hits the surface of the annular curved plate, thereby ensuring the effect of secondary mixing of the gas. Step 3: After the gas mixing is completed, the air pump and the air compressor stop working. At this time, the air pump connected to the exhaust pipe fills the mixed gas into the air bottle for collection.

[0016] In the above technical solution, the beneficial effects of the present invention are: 1. The present invention first delivers the gas into the compression chamber for retention and storage, and compresses the gas in the compression chamber to a certain extent through the pressure block and the piston, thereby avoiding the situation where the flow meter is inaccurate due to the appearance of bubbles in the gas delivered to the mixing chamber during the delivery process, thereby ensuring accurate gas mixing; 2. The present invention adjusts the volume flow rate of the gas to be mixed in the compression chamber by adjusting the sliding distance of the compression block in the buffer space, so that the compression chamber cooperates with the flow meter and the inflation component to accurately control the volume flow rate of the gas entering the mixing chamber, thereby accurately controlling the ratio of the mixed gas; 3. The present invention performs turbulent mixing on the gas through the jet assembly, and divides the mixing chamber into two upper and lower mixing spaces by providing a partition, so that the gas is mixed once in the upper space of the mixing chamber through the primary mixing mechanism, and the gas is mixed twice in the lower space of the mixing chamber through the secondary mixing mechanism. The two-time mixing method ensures the effect of gas mixing and avoids stratification of the gas after mixing is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a high-precision gas mixing device provided by an embodiment of the present invention; Figure 2 A schematic plan view of the structure of a high-precision gas mixing device according to another embodiment of the present invention; Figure 3 Another embodiment of the present invention provides Figure 2 Cross-sectional view at AA; Figure 4 A partial cross-sectional view of the installation frame, compression chamber, buffer space, limiting strip and pressing block provided in another embodiment of the present invention; Figure 5 Another embodiment of the present invention provides Figure 3 A local enlarged schematic diagram of point M; Figure 6 Another embodiment of the present invention provides Figure 3 A local enlarged schematic diagram of location N; Figure 7 Another embodiment of the present invention provides Figure 3 A local enlarged schematic diagram of point K.

[0019] Description of reference numerals: 1. Mixing chamber; 10. Exhaust pipe; 100. Sealing valve; 2. Compression assembly; 20. Mounting frame; 200. Compression chamber; 201. Buffer space; 202. Guide strip; 203. Limit strip; 204. Adjustment handle; 205. Retaining ring; 206. Locking spring; 21. Piston; 22. First pipeline; 23. Inlet pipe; 24. Second pipeline; 25. Connecting pipe; 26. Press block; 27. Sealing oil; 3. Inflating assembly; 30. Air compressor; 31. Air supply pipe; 32. Exhaust pipe 4. Jet assembly; 40. Drive motor; 400. Rotating shaft; 41. Partition; 410. Annular curved plate; 42. Primary mixing mechanism; 420. First fan; 421. Support rod; 422. Hollow hemisphere; 43. Secondary mixing mechanism; 430. Spiral jet tube; 4300. Jet hole; 4301. Vertical portion; 431. Drive gear; 432. Driven gear; 433. Second fan; 434. Support plate; 435. Through hole; 436. Sliding block; 437. Annular curved plate. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "side", "inside", "outside", "one end", "the other end", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] like Figure 1-7 As shown, an embodiment of the present invention provides a high-precision gas mixing device, including a mixing chamber 1, an exhaust pipe 10 is provided on one side of the lower end of the mixing chamber 1, and a sealing valve 100 is provided on the exhaust pipe 10. The mixing chamber 1 is used to mix gases, and two compression assemblies 2 are symmetrically provided on the outer side of the mixing chamber 1. Each compression assembly 2 is used to place a single gas. An inflation assembly 3 is provided at the upper end of the mixing chamber 1. The inflation assembly 3 is used to transport the gas in the compression assembly 2 into the mixing chamber 1 in proportion; Compression assembly 2, compression assembly 2 includes a mounting frame 20, two compression chambers 200 are symmetrically arranged inside the mounting frame 20, a piston 21 is provided in each compression chamber 200 in a sliding manner, the upper ends of the two compression chambers 200 are connected by a first pipe 22, and the first pipe 22 is connected to the air inlet pipe 23, a second pipe 24 is further provided at the upper ends of the two compression chambers 200, the second pipe 24 is connected to the inflation assembly 3 through a connecting pipe 25, a buffer space 201 is further provided in the mounting frame 20, a pressure block 26 is provided in the buffer space 201 in a sliding manner, the lower end of the compression chamber 200 is connected to the lower end of the buffer space 201, and a sealing oil 27 is provided between the two, and the sealing oil 27 circulates between the compression chamber 200 and the buffer space 201 through a valve; The jet assembly 4 includes a drive motor 40, which is arranged in the middle of the upper end of the mixing bin 1. A rotating shaft 400 is provided at the output end of the drive motor 40. A partition 41 is provided in the middle of the rotating shaft 400 in a rotating manner. The partition 41 is provided in the middle of the inner side of the mixing bin 1. The partition 41 separates the mixing bin 1 into two upper and lower spaces. A primary mixing mechanism 42 is provided on the upper outer side of the rotating shaft 400, and a secondary mixing mechanism 43 is provided on the lower outer side of the rotating shaft 400.

[0023] Furthermore, the compression assembly 2 also includes a guide bar 202, which is arranged on the middle part of a side of the outside of the installation frame 20 away from the mixing chamber 1, and a limit bar 203 is provided on the guide bar 202 in a sliding manner. The limit bar 203 is soft, and one end of the limit bar 203 is provided with an adjustment handle 204 in a threaded manner. The adjustment handle 204 is on the outside of the installation frame 20, and the other end of the limit bar 203 is provided to be slidably arranged in the installation frame 20 and at the upper end of the pressure block 26. A retaining ring 205 is provided on the adjustment handle 204 in a sliding manner, and a locking spring 206 is provided between the retaining ring 205 and the handle. The locking spring 206 and the retaining ring 205 are sleeved on the handle. In this way, when the gas to be mixed is transported to the compression chamber 200 through the intake pipe 23 and the first pipe 22, the rotating handle The handle releases the locking fixation of the limit bar 203, allowing the limit bar 203 to slide on the guide bar 202, thereby adjusting the height of the limit bar 203 close to the pressure block 26, and then enabling the limit bar 203 to adjust the moving distance of the pressure block 26 in the buffer space 201. After the position adjustment of the limit bar 203 is completed, the handle is rotated in the opposite direction so that the handle rotates and moves along the limit bar 203 through the thread. At this time, the handle squeezes the locking spring 206, so that the locking spring 206 squeezes the retaining ring 205, so that the handle and the retaining ring 205 lock the handle itself to the guide bar 202. In this way, by adjusting the moving distance of the pressure block 26 in the buffer space 201, the volume of the buffer space 201 to accommodate the sealing oil 27 is adjusted, so as to adjust the size of the compression chamber 200 to control the volume flow rate of the mixed gas.

[0024] In another embodiment provided by the present invention, a one-way valve is provided on both the air inlet pipe 23 and the connecting pipe 25, and a flow meter is also provided on the connecting pipe 25; The specific implementation is as follows: a one-way valve is provided on both the air inlet pipe 23 and the connecting pipe 25 to prevent the backflow of the gas to be mixed into the mixing chamber 1. The flow meter on the connecting pipe 25 can measure the specific volume flow of the gas to be mixed into the mixing chamber 1 so as to accurately mix the gas.

[0025] In another embodiment provided by the present invention, the inflation component 3 includes two air compressors 30, which are symmetrically arranged at the upper end of the mixing bin 1. Each air compressor 30 is connected to the second pipe 24 through a connecting pipe 25. The lower end of each air compressor 30 is provided with an air delivery pipe 31, which is symmetrically arranged on the upper side of the interior of the mixing bin 1. Two horizontally arranged air outlet pipes 32 are provided below the air delivery pipes 31. The air outlet pipes 32 are provided with a plurality of air outlet holes along their length, and the diameter of the air outlet holes gradually decreases in the direction close to the wall of the mixing bin 1. The specific implementation is as follows: after the gas to be mixed enters the compression chamber 200 and remains there, when the piston 21 in the compression chamber 200 slides to the bottom along the compression chamber 200, the air compressor 30 starts working, so that the air compressor 30 transports the gas to be mixed from the compression chamber 200 through the second pipe 24 and the connecting pipe 25 to the gas pipe 31, so that the gas to be mixed entering the gas pipe 31 passes through the outlet pipe 32 and is sprayed from the outlet hole to the upper space of the mixing chamber 1. The aperture diameter of the outlet hole gradually decreases in the direction close to the wall of the mixing chamber 1, so that the gas in the outlet pipe 32 can be sprayed out from the end of the outlet pipe 32 close to the rotating shaft 400, so that the gas entering the mixing chamber 1 from the two gas pipes 31 can fully contact and mix, and when the gas entering the upper space of the mixing chamber 1 collides and mixes with each other here, the driving motor 40 drives the rotating shaft 400 to rotate, so that the rotating shaft 400 drives the primary mixing mechanism 42 arranged thereon to perform the first mixing on the gas in the upper space of the mixing chamber 1.

[0026] In another embodiment provided by the present invention, the partition 41 is wavy, and the waves on the partition 41 form an annular cone, the flared opening of the annular cone faces the drive motor 40, and at least two circular holes are further provided at the lower end of the partition 41, and the circular holes are provided at the lower end of the partition 41; The specific implementation method is: the gas during mixing collides with the annular conical surface, so that the annular cone forms a backflow for the gas during mixing, ensuring the effect of gas mixing, and the circular hole facilitates the mixed gas in the upper space of the mixing bin 1 to enter the lower space of the mixing bin 1.

[0027] In another embodiment provided by the present invention, the primary mixing mechanism 42 includes a first fan 420, which is arranged at the upper end of the rotating shaft 400 and at the upper end of the interior of the mixing chamber 1. A plurality of support rods 421 are evenly arranged along the circumference of the outer side of the rotating shaft 400. The support rods 421 are arranged between the air outlet pipes 32, and each support rod 421 is evenly arranged along its length. A plurality of hollow hemispheres 422 are evenly arranged; The specific implementation is as follows: when the mixed gas enters the upper space of the mixing bin 1, the rotating shaft 400 is driven to rotate by the driving motor 40, so that the rotating shaft 400 drives multiple first support rods 421 to rotate, thereby making the multiple first support rods 421 respectively drive the multiple hollow hemispheres 422 arranged thereon to rotate, so that the multiple hollow hemispheres 422 can transport the gas on one side of the upper space of the mixing bin 1 to the other side, so that the two gases are fully mixed, and the support rods 421 and the hollow hemispheres 422 during rotation can collide with the gas in the upper space of the mixing bin 1, and the driving motor 40 drives the rotating shaft 400 to rotate, and drives the first fan 420 to rotate, so that the first fan 420 blows the mixed gas to collide with the upper surface of the partition 41, thereby ensuring that the mixed gas can be fully mixed.

[0028] Furthermore, a plurality of annular curved panels 410 are provided at the upper end of the partition 41, and the diameter of the annular curved panel 410 gradually decreases in the direction approaching the circular hole. In this way, when the rotating shaft 400 is driven to rotate by the driving motor 40, the rotating shaft 400 drives the first fan 420 to rotate, so that when the first fan 420 blows the mixed gas toward the partition 41, the mixed gas will collide with the surface of the annular curved panel 410. At this time, the curved surface of the annular curved panel 410 can transport the gas that hits it upward, so that the gas blown toward the partition 41 and the gas reflected back by the annular curved panel 410 collide with each other, ensuring that the gas is fully mixed.

[0029] In another embodiment provided by the present invention, the secondary mixing mechanism 43 includes at least two spiral jet tubes 430, each of which is evenly provided with a plurality of jet holes 4300. A vertical portion 4301 is provided at the upper end of the spiral jet tube 430, and the vertical portion 4301 is rotatably disposed in the circular hole of the partition 41. A driving gear 431 is provided at the middle portion of the rotating shaft 400, and a driven gear 432 is provided at the upper end of each spiral jet tube 430. Each driven gear 432 is meshed with the driving gear 431. A second fan 433 is provided at the lower end of the rotating shaft 400, and the rotation direction of the second fan 433 is opposite to that of the first fan 420. The specific implementation is as follows: the air compressor 30 continuously delivers the gas to be mixed to the upper space of the mixing bin 1 through the air pipe 31 for mixing. As the input gas increases, the pressure in the upper space of the mixing bin 1 gradually increases. At this time, the gas mixed by the primary mixing mechanism 42 can enter the vertical portion 4301 of the spiral jet pipe 430 through the circular hole, so that the spiral jet pipe 430 delivers the gas that has entered it and has been mixed once to the lower space of the mixing bin 1, and sprays it to the lower space of the mixing bin 1 through the jet holes 4300 evenly provided on the spiral jet pipe 430. At the same time, the rotating shaft 400 is driven by the driving motor 40 to rotate, so that the rotating shaft 400 drives the driving gear 431 Rotate, so that the driving gear 431 drives multiple driven gears 432 meshing with it to rotate simultaneously, and then the driven gear 432 drives the spiral jet pipe 430 connected to it to rotate synchronously, so that the spiral jet pipe 430 during rotation can rotate to spray out the gas mixed once, and at the same time, the spiral jet pipe 430 during rotation can turbulently affect the mixed gas in the lower space of the mixing bin 1, so as to facilitate the secondary mixing of the gas after the primary mixing; the driving motor 40 drives the driving gear 431 to rotate through the rotating shaft 400, and at the same time drives the second fan 433 to rotate, so that the second fan 433 blows the mixed gas toward the partition 41, so that the gas during the secondary mixing can be fully mixed.

[0030] In another embodiment provided by the present invention, the driving gear 431 and the driven gear 432 are both hollow gears; The specific implementation is as follows: the hollowed-out driven gear 432 and the driving gear 431 facilitate the passage of the mixed gas accelerated by the turbulence of the second fan 433 and move toward the partition 41. At the same time, the hollowed-out driven gear 432 and the driving gear 431 can also turbulently mix the secondary mixed gas when rotating, so as to facilitate full mixing of the gas in the secondary mixing.

[0031] In another embodiment provided by the present invention, the secondary mixing mechanism 43 further includes a support plate 434, which is arranged at the lower end of the interior of the mixing chamber 1 and is directly above the second fan 433. The support plate 434 is provided with the same number of through holes 435 as the spiral air jet tube 430, and each through hole 435 is provided with a sliding block 436 on the outer side. The sliding block 436 is slidably arranged at the upper end of the support plate 434, and the lower end of the spiral air jet tube 430 is arranged at the upper end of the sliding block 436; The specific implementation is as follows: when the driving motor 40 drives the driving gear 431 to rotate through the rotating shaft 400, the driving gear 431 drives the spiral jet tube 430 to rotate through the driven gear 432 engaged therewith. In order to avoid the lower end of the spiral jet tube 430 from shaking during rotation and causing it to hit the rotating shaft 400, that is, to ensure the stability of the rotation of the rotating tube, a sliding block 436 is provided to guide and limit the lower end of the rotating tube to avoid shaking of the lower end of the rotating tube during rotation, and the through hole 435 provided on the support plate 434 facilitates the passage of the airflow generated by the rotation of the second fan 433, thereby ensuring that the secondary mixed gas is fully mixed.

[0032] In another embodiment provided by the present invention, the secondary mixing mechanism 43 further includes at least two annular arc plates 437 , and the annular arc plates 437 are disposed at the lower end of the partition 41 ; The specific implementation is as follows: when the driving motor 40 drives the second fan 433 to rotate through the rotating shaft 400, the airflow generated by the second fan 433 drives the gas in the secondary mixing to collide with the surface of the annular arc plate, so that the annular arc plate 437 reflects the collided gas and sprays it in the direction of the second fan 433. In this way, the airflow generated by the rotation of the second fan 433 collides with the gas reflected back by the annular arc plate 437, thereby ensuring that the secondary mixed gas is fully mixed.

[0033] A high-precision gas mixing method is applicable to a high-precision gas mixing device, comprising the following steps: The first step: connect the air inlet pipe 23 to the gas cylinder containing the gas to be mixed, and an air pump is set between the gas cylinder containing the gas to be mixed and the air inlet pipe 23, and connect it to the external air pump through the exhaust pipe 10 and open the sealing valve 100, so that the air pump can extract the impurity gas in the mixing chamber 1, the compression chamber 200 and the buffer space 201. After the impurity gas is extracted, close the sealing valve 100 and open the gas cylinder containing the gas to be mixed, and use the air pump to transport the gas to be mixed through the air inlet pipe 23 and the first pipeline 22 into the compression chamber 200. At this time, the air compressor 30 does not work, and the air pump continues to transport the gas to be mixed into the compression chamber 200, so that the gas to be mixed squeezes the piston 21. The piston 21 is made to descend along the compression chamber 200, so that the compression chamber 200 can accommodate more gas to be mixed. At this time, the piston 21 squeezes the sealing oil 27, so that the sealing oil 27 enters the buffer space 201 through the valve. At the same time, the sealing oil 27 squeezes the pressing block 26, so that the pressing block 26 rises along the buffer space 201, so that the buffer space 201 can accommodate more sealing oil 27. When the piston 21 moves to the bottom of the compression chamber 200, the air compressor 30 is turned on and the air pump is turned off at the same time. In this way, the air compressor 30 can transport the gas to be mixed in the compression chamber 200 through the second pipe 24 and the connecting pipe 25 to the gas pipe 31, and the gas in the compression chamber 200 is transported to When the air is in the air delivery pipe 31, the pressure in the compression chamber 200 decreases. At this time, the pressure block 26 descends along the buffer space 201 under the action of gravity. At this time, the sealing oil 27 in the buffer space 201 enters the compression chamber 200 through the valve and lifts the piston 21. When the gas to be mixed passes through the connecting pipe 25, the flow meter measures the flow of the gas to be mixed entering the mixing chamber 1. The feed amount of the mixed gas is accurately controlled by the compression chamber 200 and the flow meter. A one-way valve is provided on the air inlet pipe 23 and the connecting pipe 25 to prevent the gas to be mixed from flowing back. At the same time, before mixing the gas, the locking of the limit bar 203 is released by rotating the handle, so that the limit bar 203 slides on the guide bar 202, thereby Adjust the height of the limit bar 203 close to the pressure block 26, so that the limit bar 203 can adjust the moving distance of the pressure block 26 in the buffer space 201. After the position adjustment of the limit bar 203 is completed, rotate the handle in the opposite direction so that the handle rotates and moves along the limit bar 203 through the thread. At this time, the handle squeezes the locking spring 206, so that the locking spring 206 squeezes the retaining ring 205, so that the handle and the retaining ring 205 lock the handle itself to the guide bar 202. In this way, by adjusting the moving distance of the pressure block 26 in the buffer space 201, the volume of the buffer space 201 to accommodate the sealing oil 27 is adjusted, so as to adjust the size of the compression chamber 200 to control the volume flow rate of the mixed gas.

[0034] Step 2: When the air compressor 30 delivers the gas to be mixed to the gas delivery pipe 31, the gas delivery pipe 31 delivers the gas to be mixed to the gas outlet pipe 32, so that the two gas outlet pipes 32 spray the gas to be mixed toward the mixing chamber 1 through the gas outlet holes thereon. When the gas to be mixed enters the mixing chamber 1, the driving motor 40 drives the rotating shaft 400 to rotate, so that the rotating shaft 400 drives the support rod 421 to rotate, thereby causing the support rod 421 to drive the multiple hollow hemispheres 422 thereon to rotate, so that the hollow hemispheres 422 deliver the gas to be mixed from one place to another, so as to improve the uniformity of gas mixing. When the gas to be mixed is mixed by turbulence through the support rod 421 and the hollow hemispheres 422, the driving motor 40 drives the first fan 420 through the rotating shaft 400. The first fan 420 rotates to blow the gas in the mixing process, and the first fan 420 rotates and blows the mixed gas to hit the upper surface of the partition 41 to ensure that the gas is fully mixed. In addition, a plurality of annular curved panels 410 are provided on the upper end of the partition 41, and the diameter of the annular curved panel 410 gradually decreases in the direction close to the circular hole. In this way, when the rotating shaft 400 is driven to rotate by the driving motor 40, the rotating shaft 400 drives the first fan 420 to rotate, so that when the first fan 420 blows the mixed gas toward the partition 41, the mixed gas will hit the surface of the annular curved panel 410. At this time, the curved surface of the annular curved panel 410 can transport the gas that hits it upward, so that the gas blown toward the partition 41 and the annular curved panel 410 are mixed. The gases reflected back by the panel 410 collide with each other to ensure that the gases are fully mixed. At the same time, as the gas to be mixed continuously passes through the gas pipe 31 into the upper space of the mixing bin 1, the gas to be mixed in the mixing bin 1 on the upper side of the partition 41 increases, and the pressure of the mixed gas in the upper space of the mixing bin 1 gradually increases. At this time, the mixed gas in the upper space of the mixing bin 1 enters the lower space of the mixing bin 1 through the circular hole of the partition 41, and when the mixed gas enters the lower space of the mixing bin 1, the driving motor 40 rotates through the rotating shaft 400, so that the rotating shaft 400 drives the driving gear 431 to rotate, thereby causing the driving gear 431 to drive multiple driven gears 432 to rotate simultaneously, so that the driven gear 432 drives the spiral jet pipe 430 connected to it to rotate synchronously, and the rotation The spiral jet pipe 430 sprays the first mixed gas into the lower space of the mixing bin 1 through the jet hole 4300, and the spiral jet pipe 430 turbulently disturbs the lower space of the mixing bin 1 during rotation, so that the mixed gas is evenly mixed. When the spiral jet pipe 430 rotates, its lower end drives the sliding block 436 to rotate and slide on the support plate 434, so that the sliding block 436 supports and limits the spiral jet pipe 430. At the same time, the rotating shaft 400 drives the second fan 433 to rotate, so that the second fan 433 turbulently disturbs the lower space of the mixing bin 1, and the second fan 433 blows the mixed gas in the lower space of the mixing bin 1 toward the annular arc plate 437, so that the mixed gas hits the surface of the annular arc plate 437, thereby ensuring the effect of secondary gas mixing. Step 3: After the gas mixing is completed, the air pump and the air compressor 30 stop working. At this time, the air pump connected to the exhaust pipe 10 fills the mixed gas into the air bottle for collection.

[0035] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A high-precision gas mixing device, comprising a mixing chamber (1), an exhaust pipe (10) is provided on one side of the lower end of the mixing chamber (1), a sealing valve (100) is provided on the exhaust pipe (10), the mixing chamber (1) is used for mixing gases, two compression assemblies (2) are symmetrically provided on the outer side of the mixing chamber (1), each of the compression assemblies (2) is used to place a single gas, an inflation assembly (3) is provided on the upper end of the mixing chamber (1), the inflation assembly (3) is used to transport the gas in the compression assembly (2) into the mixing chamber (1) in proportion, and is characterized in that: A compression assembly (2), the compression assembly (2) comprising a mounting frame (20), two compression chambers (200) being symmetrically arranged inside the mounting frame (20), a piston (21) being slidably arranged in each compression chamber (200), the upper ends of the two compression chambers (200) being connected via a first pipe (22), and the first pipe (22) being connected to an air inlet pipe (23), a second pipe (24) being further arranged at the upper ends of the two compression chambers (200), the second pipe (24) being connected to the inflation assembly (3) via a connecting pipe (25), a buffer space (201) being further arranged in the mounting frame (20), a pressure block (26) being slidably arranged in the buffer space (201), the lower ends of the compression chambers (200) being connected to the lower ends of the buffer spaces (201), and a sealing oil (27) being arranged between the two, the sealing oil (27) being mutually circulated between the compression chambers (200) and the buffer spaces (201) via a valve; An inflation component (3), the inflation component (3) includes two air compressors (30), the air compressors (30) are symmetrically arranged at the upper end of the mixing bin (1), each of the air compressors (30) is connected to the second pipe (24) via a connecting pipe (25), and an air delivery pipe (31) is provided at the lower end of each air compressor (30), the air delivery pipes (31) are symmetrically arranged on the upper side of the interior of the mixing bin (1), and two horizontally arranged air outlet pipes (32) are provided below the air delivery pipes (31), and a plurality of air outlet holes are provided on the air outlet pipes (32) along the length direction thereof, and the diameter of the air outlet holes gradually decreases in the direction close to the bin wall of the mixing bin (1).

2. A high-precision gas mixing device according to claim 1, characterized in that: Both the air inlet pipe (23) and the connecting pipe (25) are provided with a one-way valve, and the connecting pipe (25) is also provided with a flow meter.

3. A high-precision gas mixing device according to claim 1, characterized in that: The invention also includes an air jet assembly (4), wherein the air jet assembly (4) includes a driving motor (40), the driving motor (40) is arranged at the middle of the upper end of the mixing bin (1), the output end of the driving motor (40) is provided with a rotating shaft (400), the middle part of the rotating shaft (400) is provided with a partition (41) in a rotating manner, the partition (41) is arranged at the middle part of the inner side of the mixing bin (1), and the partition (41) separates the mixing bin (1) into two upper and lower spaces, the upper outer part of the rotating shaft (400) is provided with a primary mixing mechanism (42), and the lower outer part of the rotating shaft (400) is provided with a secondary mixing mechanism (43).

4. A high-precision gas mixing device according to claim 3, characterized in that: The partition (41) is wavy, and the waves on the partition (41) form an annular cone, the expansion of the annular cone faces the drive motor (40), and at least two circular holes are provided at the lower end of the partition (41), and the circular holes are provided at the lower end of the partition (41).

5. A high-precision gas mixing device according to claim 3, characterized in that: The primary mixing mechanism (42) comprises a first fan (420), the first fan (420) being arranged at the upper end of the rotating shaft (400) and at the inner upper end of the mixing chamber (1), a plurality of support rods (421) being uniformly arranged along the circumference of the outer side of the rotating shaft (400), the support rods (421) being arranged between the air outlet pipes (32), and a plurality of hollow hemispheres (422) being uniformly arranged on each support rod (421) along its length direction.

6. A high-precision gas mixing device according to claim 3, characterized in that: The secondary mixing mechanism (43) includes at least two spiral jet tubes (430), each of which is evenly provided with a plurality of jet holes (4300), and a vertical portion (4301) is provided at the upper end of each spiral jet tube (430), and the vertical portion (4301) is rotatably arranged in the circular hole of the partition (41). A driving gear (431) is provided at the middle of the rotating shaft (400), and a driven gear (432) is provided at the upper end of each spiral jet tube (430), and each driven gear (432) is meshed with the driving gear (431). A second fan (433) is provided at the lower end of the rotating shaft (400), and the rotation direction of the second fan (433) is opposite to that of the first fan (420).

7. A high-precision gas mixing device according to claim 6, characterized in that: The driving gear (431) and the driven gear (432) are both hollow gears.

8. A high-precision gas mixing device according to claim 6, characterized in that: The secondary mixing mechanism (43) further includes a support plate (434), the support plate (434) being arranged at the lower end inside the mixing chamber (1), the support plate (434) being located directly above the second fan (433), the support plate (434) being provided with through holes (435) having the same number as the spiral jet tubes (430), a sliding block (436) being provided on the outer side of each through hole (435), the sliding block (436) being arranged at the upper end of the support plate (434) in a sliding manner, and the lower end of the spiral jet tube (430) being arranged at the upper end of the sliding block (436).

9. A high-precision gas mixing device according to claim 6, characterized in that: The secondary mixing mechanism (43) further comprises at least two annular arc plates (437), wherein the annular arc plates (437) are arranged at the lower end of the partition plate (41).

10. A high-precision gas mixing method, characterized in that: The method for high-precision gas mixing is applicable to a high-precision gas mixing device according to any one of claims 1 to 9, comprising the following steps: The first step is to connect the air inlet pipe (23) to the gas cylinder containing the gas to be mixed, and to provide an air pump between the gas cylinder containing the gas to be mixed and the air inlet pipe (23), and to connect the air pump to the outside through the exhaust pipe (10) and open the sealing valve (100), so that the air pump extracts the impurity gas in the mixing chamber (1), the compression chamber (200), and the buffer space (201). After the impurity gas is extracted, the sealing valve (100) is closed and the gas cylinder containing the gas to be mixed is opened, and the gas to be mixed is pumped through the air inlet pipe (23) and the first pipeline (22) by the air pump. The air is delivered to the compression chamber (200). At this time, the air compressor (30) does not work, and the air pump continuously delivers the gas to be mixed to the compression chamber (200), so that the gas to be mixed squeezes the piston (21), so that the piston (21) descends along the compression chamber (200), so that the compression chamber (200) can accommodate more gas to be mixed. At this time, the piston (21) squeezes the sealing oil (27), so that the sealing oil (27) enters the buffer space (201) through the valve, and at the same time, the sealing oil (27) squeezes the pressing block (26). , so that the pressing block (26) rises along the buffer space (201) so that the buffer space (201) can accommodate more of the sealing oil (27). When the piston (21) moves to the bottom of the compression chamber (200), the air compressor (30) is turned on and the air pump is turned off at the same time. In this way, the air compressor (30) can transport the gas to be mixed in the compression chamber (200) through the second pipe (24) and the connecting pipe (25) to the gas delivery pipe (31). When the gas in the compression chamber (200) is transported to the gas delivery pipe (31), the gas in the compression chamber (200) is The pressure decreases, and the pressing block (26) descends along the buffer space (201) under the action of gravity. At this time, the sealing oil (27) in the buffer space (201) enters the compression chamber (200) through the valve and lifts the piston (21). When the gas to be mixed passes through the connecting pipe (25), the flow meter measures the flow of the gas to be mixed entering the mixing chamber (1). The feeding amount of the mixed gas is accurately controlled through the compression chamber (200) and the flow meter. The one-way valve is provided on both the air inlet pipe (23) and the connecting pipe (25) to prevent the gas to be mixed from flowing back. Step 2: When the air compressor (30) delivers the gas to be mixed to the gas delivery pipe (31), the gas delivery pipe (31) delivers the gas to be mixed to the gas outlet pipe (32), so that the two gas outlet pipes (32) spray the gas to be mixed toward the mixing chamber (1) through the gas outlet holes thereon. When the gas to be mixed enters the mixing chamber (1), the driving motor (40) drives the rotating shaft (400) to rotate, so that the rotating shaft (400) drives the support rod (421) to rotate, thereby causing the support rod (421) to drive the multiple hollow hemispheres (422) thereon to rotate, so that the hollow hemispheres (422) deliver the gas to be mixed from one place to another, so as to improve The uniformity of gas mixing is improved, and when the gas to be mixed is mixed by the turbulent flow of the support rod (421) and the hollow hemisphere (422), the driving motor (40) drives the first fan (420) to rotate through the rotating shaft (400), so that the first fan (420) blows the gas in the mixing process, and the first fan (420) rotates and blows the mixed gas to hit the upper surface of the partition (41), ensuring that the gas is fully mixed once. At the same time, as the gas to be mixed continuously passes through the gas pipe (31) into the upper space of the mixing chamber (1), the gas to be mixed in the mixing chamber (1) on the upper side of the partition (41) increases, and the mixing of the gas in the upper space of the mixing chamber (1) is improved. The pressure of the gas gradually increases. At this time, the mixed gas in the upper space of the mixing chamber (1) enters the lower space of the mixing chamber (1) through the circular hole of the partition (41). When the mixed gas enters the lower space of the mixing chamber (1), the driving motor (40) rotates through the rotating shaft (400), so that the rotating shaft (400) drives the driving gear (431) to rotate, thereby causing the driving gear (431) to drive the plurality of driven gears (432) to rotate simultaneously, so that the driven gear (432) drives the spiral jet pipe (430) connected thereto to rotate synchronously. When rotating, the spiral jet pipe (430) sprays the first mixed gas through the jet hole (4300) toward The spiral jet tube (430) is in the lower space of the mixing bin (1), and when rotating, it disturbs the lower space of the mixing bin (1), so that the gas in the mixing is evenly mixed. When the spiral jet tube (430) rotates, its lower end drives the sliding block (436) to rotate and slide on the support plate (434), so that the sliding block (436) supports and limits the spiral jet tube (430). At the same time, the rotating shaft (400) drives the second fan (433) to rotate, so that the second fan (433) disturbs the lower space of the mixing bin (1), and the second fan (433) blows the mixed gas in the lower space of the mixing bin (1) toward the annular arc plate (437).The gas being mixed impinges on the surface of the annular arc plate (437), thereby ensuring the effect of secondary mixing of the gas; Step 3: After the gas mixing is completed, the air pump and the air compressor (30) stop working, and the air pump connected to the exhaust pipe (10) fills the mixed gas into the air bottle for collection.

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