A n-butane and air mixing device and its mixing method

Abstract

The present invention relates to the technical field of gas mixing, and specifically discloses a butane and air mixing device and a mixing method thereof, which includes a mixing cylinder and a mixing mechanism. A mixing chamber is provided inside the mixing cylinder. The mixing mechanism includes a partition plate, a first driving member, and a mixing assembly. The partition plate is longitudinally movably installed in the mixing chamber, dividing the mixing chamber vertically into a first cavity and a second cavity. The mixing assembly includes a plurality of air ducts and seals. Each air duct is longitudinally rotatably installed in the mixing chamber, and the upper end extends to the outside of the mixing cylinder to form an air outlet. An air inlet one and an air inlet two are respectively provided at the upper and lower ends of each air duct. The partition plate can close the air inlet one or the air inlet two. A plurality of through holes are provided on the side wall of the air duct, and one end of the seal is rotatably installed on the air duct. The present invention can achieve the full mixing of air and butane, and at the same time facilitate the multi-point sampling and detection of the mixed gas to ensure the mixing uniformity.

Description

Technical Field

[0001] The present invention relates to the technical field of gas mixing, and particularly relates to a n-butane and air mixing device and a mixing method thereof. Background Art

[0002] Maleic anhydride, also known as cis-butenedioic anhydride or maleic anhydride, is an important organic chemical raw material. The benzene oxidation method and the n-butane oxidation method are two main production methods for maleic anhydride. Due to the advantages of cheap raw materials, less environmental pollution, and low manufacturing cost of maleic anhydride by the n-butane oxidation process, it has currently become the main route for maleic anhydride production globally. In this process, whether the n-butane and compressed air are sufficiently mixed directly affects the production efficiency and quality of the maleic anhydride workshop.

[0003] The patent document with the authorization announcement number CN111036103B discloses a n-butane and air mixing device, which includes an air compression assembly, a spiral intake pipe, and a mixing chamber; compressed air enters the spiral intake pipe through the air outlet channels respectively, forms eddy gas through the spiral pipeline, and is introduced into the mixing chamber. The n-butane input pipeline inputs n-butane gas into the mixing chamber. Since the density of n-butane gas is greater than that of air, the n-butane gas is upwardly deflected through the spoiler, and the n-butane gas and compressed air contact and mix in the upper part of the mixing chamber. The driving motor is driven by the total control button to drive the swing support shaft to swing, so that the spoiler fan further mixes the gradually sinking gas.

[0004] However, when mixing air and n-butane in a counter-flush manner, only the air and n-butane at the very front can be fully contacted, while the air and n-butane at the rear will be scattered around due to the counter-flush force, resulting in insufficient mixing of air and n-butane. In addition, in order to verify that the mixed gas reaches a uniform concentration distribution, it is usually necessary to perform multi-point sampling and detection on it. However, the above mixing device is not convenient for multi-point sampling of the mixed gas, which may lead to uneven mixing. Summary of the Invention

[0005] The present invention provides a n-butane and air mixing device and a mixing method thereof, aiming to solve the problems existing in the mixing device in the related technology, such as insufficient mixing of air and n-butane, affecting the mixing uniformity, and not being convenient for multi-point sampling and detection of the mixed gas.

[0006] In a first aspect, a n-butane and air mixing device of the present invention includes a mixing cylinder, a mixing chamber is provided inside the mixing cylinder, an air inlet one and an air inlet two are provided on the mixing cylinder, and further includes a mixing mechanism, and the mixing mechanism includes a partition board, a driving member one, and a mixing component;

[0007] The partition is longitudinally movably installed in the mixing chamber, dividing the mixing chamber into an upper cavity one and a lower cavity two. Cavity one communicates with inlet one, and cavity two communicates with inlet two. The first driving member is used to drive the partition to move up and down.

[0008] The mixing assembly includes a plurality of air ducts and seals. Each air duct is longitudinally rotatably installed in the mixing chamber, and its upper end extends outside the mixing cylinder to form an air outlet. The air duct movably penetrates through the partition. Each air duct is hollow inside, and has an upper vent one and a lower vent two respectively at its upper and lower ends. The partition can close vent one or vent two. A plurality of through holes are provided on the side wall of the air duct. One end of the seal is rotatably installed on the air duct. When the seal is in a vertical state, it can make way for the partition and close the through holes. When the seal is in an inclined state, it can stir the gas in the mixing chamber.

[0009] During operation, air is introduced into cavity one through inlet one, and at the same time, n-butane is introduced into cavity two through inlet two. Then, the first driving member drives the partition to move downward. At this time, the n-butane in cavity two will enter cavity one through the through holes, contact and mix with the air in cavity one. Then, the first driving member drives the partition to move up and down, so that the air and n-butane are repeatedly transferred between cavity one and cavity two to achieve uniform mixing of the two. During the mixing process, the seal is in an inclined state, and it can drive the seal to rotate synchronously through the rotation of the air duct to promote further mixing of the gas. During sampling, all through holes are closed, the upper-layer gas is sampled through vent one, the lower-layer gas is sampled through vent two, and at the same time, sampling at different positions is carried out through a plurality of air ducts to achieve multi-point sampling and detection of the gas.

[0010] Preferably, a plurality of first mounting grooves are provided in the upper part of the air duct, and a plurality of second mounting grooves are provided in the lower part of the air duct. The first mounting grooves and the second mounting grooves are both arranged along the axial direction of the air duct. The distance between the upper end of the first mounting groove and the upper end of the mixing chamber is less than the thickness of the partition, and the distance between the lower end of the second mounting groove and the lower end of the mixing chamber is less than the thickness of the partition. The through holes include upper through holes provided in the first mounting grooves and lower through holes provided in the second mounting grooves. The seals include a first baffle provided in the first mounting grooves and a second baffle provided in the second mounting grooves. The lower end of the first baffle is hinged to the air duct, and the upper end of the second baffle is hinged to the air duct, and torsion springs are provided at the hinge joints, so that in the initial state, the first baffle and the second baffle are both in an inclined state.

[0011] Preferably, the lengths of each of the first mounting grooves are different, and the length of each first baffle is adapted to the length of the corresponding first mounting groove. The lengths of each of the second mounting grooves are different, and the length of each second baffle is adapted to the length of the corresponding second mounting groove. When the partition moves upward, a plurality of first baffles can be closed in order from long to short. When the partition moves downward, a plurality of second baffles can be closed in order from long to short.

[0012] The effect is that by closing baffle one and baffle two in sequence, the number of through holes in the open state can be gradually reduced, rather than closing the upper through holes or the lower through holes at the same time, ensuring that air and n-butane can flow normally in cavity one and cavity two.

[0013] Preferably, a top plate is fixedly installed on the upper end of the mixing chamber, and the air guide tube is rotatably arranged through the top plate. An installation cavity is formed between the top plate and the upper end of the mixing barrel, and a driving structure for driving the air guide tube to rotate is provided in the installation cavity. The driving structure is arranged in the installation cavity, and the driving structure includes gear one, gear two and driving member two. Gear one and gear two are both rotatably installed on the top plate, gear one is fixedly sleeved on the outside of the air guide tube, gear two is meshed with gear one for transmission, driving member three is installed on the mixing barrel, and the output end is connected to gear two for driving gear two to rotate.

[0014] Preferably, a movable rod is longitudinally slidably installed in the air guide tube, and a driving member three for driving the movable rod to move up and down is provided in the mixing barrel. A plurality of through holes are provided on the side wall of the movable rod. When the through holes are aligned with the through holes, the through holes are in an open state, and when the through holes are offset from the through holes, the through holes are in a closed state.

[0015] The effect is that during the mixing process, the movable rod is located in the initial position, so that the through hole is open, and the air and n-butane can flow normally in cavity one and cavity two. During sampling, the movable rod moves upward to close the through hole, and the upper gas and the lower gas can be sampled separately.

[0016] Preferably, the lower end of the air guide tube is suspended, the lower end of the movable rod passes through the lower end of the air guide tube and extends outward, an elastic member 1 is provided between the upper end of the movable rod and the mixing cylinder for driving the movable rod to reset, a bottom plate is longitudinally slidably installed at the lower end of the mixing chamber, a driving member 3 is installed at the bottom of the mixing cylinder, an output end of the driving member 3 extends vertically upward and is connected to the bottom plate, when the bottom plate moves upward, it can push the movable rod to move upward, so that the through-port and the through hole are staggered.

[0017] Preferably, an exhaust port is provided at the lower end of the movable rod. When the movable rod moves upward so that the through port and the through hole are staggered, vent one is aligned with the side wall of the movable rod, so that vent one is in a closed state, and vent two is aligned with the exhaust port, so that vent two remains in an open state.

[0018] The effect is that when the movable rod moves upward, the through hole and vent one can be closed, while vent two can be opened. At this time, the gas in the mixing chamber can be gradually discharged through the gradual downward movement of the partition, reducing the retention of gas in the mixing chamber and ensuring the gas discharge effect.

[0019] Preferably, a stirring assembly is provided at the bottom of the mixing cylinder. The stirring assembly includes a rotating shaft, a scraping plate, and a driving member IV. The rotating shaft longitudinally rotates through the bottom of the mixing cylinder. A plurality of scraping plates are provided and are installed on the rotating shaft at intervals along the circumferential direction of the rotating shaft. The driving member IV is installed on the mixing cylinder, and its output end vertically extends upward. The rotating shaft is in longitudinal sliding fit and anti-rotation fit with the output end of the driving member IV. A receiving groove for accommodating the scraping plate is provided on the bottom plate. An elastic member II for driving the rotating shaft to longitudinally reset is provided between the rotating shaft and the output end of the driving member IV, so that in the initial state, the scraping plate extends above the receiving groove.

[0020] Preferably, the lower end of the scraping plate can contact the upper end of the bottom plate. A waste discharging port is provided at the bottom of the mixing cylinder, and the waste discharging port communicates with the inside of the receiving groove.

[0021] The effect is that the gas at the lower end of the mixing chamber can be stirred by the rotation of the scraping plate, avoiding the stratification phenomenon of air and n-butane due to density differences, ensuring the mixing uniformity, and at the same time, the settled impurities can be scraped into the receiving groove for temporary storage, realizing the separation of gas and impurities.

[0022] In a second aspect, a method for mixing n-butane and air according to the present invention uses the above-mentioned n-butane and air mixing device, and includes the following steps:

[0023] S1. Gas introduction: Air is introduced into the first cavity from the first air inlet, and at the same time, n-butane is introduced into the second cavity from the second air inlet.

[0024] S2. Mixing: The partition plate is driven by the driving member I to move downward, and n-butane will enter the first cavity through the through holes on the side wall of the air guide pipe and mix with the air in the first cavity. Then, the driving member I drives the partition plate to move up and down repeatedly, so that the air and n-butane are repeatedly transferred between the first cavity and the second cavity, and during this process, the air and n-butane are mixed.

[0025] S3. Stirring: During the mixing process, the sealing member is in an inclined state, and the rotation of the air guide pipe can drive the sealing member to rotate, so that the air and n-butane are further mixed. When the partition plate moves to the position of the sealing member, the sealing member can turn to a vertical state to make way.

[0026] S4. Sampling: After the mixing is completed, sampling at different positions is carried out through a plurality of air guide pipes, sampling of the upper-layer gas is carried out through the first ventilation port, and sampling of the lower-layer gas is carried out through the second ventilation port, so as to realize multi-point sampling detection of the mixed gas.

[0027] S5. Exhaust: The mixed gas is discharged outwards through the air outlet.

[0028] Air and n-butane are respectively introduced into cavity one and cavity two. The partition plate is driven downward by driving member one, so that the n-butane in cavity two enters cavity one through the through hole. Then, driving member one drives the partition plate to move up and down repeatedly, enabling the air and n-butane to reciprocally transfer between cavity one and cavity two, achieving uniform mixing. During the mixing process, the rotation of the seal can promote further gas mixing, and at the same time, the seal can be rotated to a vertical state to make way, avoiding interference with the partition plate. During sampling, the upper and lower layer gases are separately sampled through vent one and vent two, and sampling at different positions is carried out through multiple gas pipes, realizing multi-point sampling detection.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The present invention is provided with a mixing mechanism. The mixing cavity is divided into cavity one and cavity two by a partition plate. Air and n-butane are respectively introduced into cavity one and cavity two, and then, through the up and down movement of the partition plate, the air and n-butane are forced to pass through the through holes provided on the gas pipe and flow in cavity one and cavity two, increasing the contact opportunities between the air and n-butane and preventing local enrichment of n-butane, ensuring the mixing uniformity of the air and n-butane.

[0031] 2. The present invention is provided with a seal. During the mixing process, the seal is in an inclined state. The rotation of the gas pipe can drive the seal to rotate synchronously, stirring the gas in the mixing cavity, further mixing the air and n-butane. At the same time, the seal can also be rotated to a vertical state to make way, avoiding interference with the up and down movement of the partition plate.

[0032] 3. The present invention is provided with vent one and vent two. During the mixing process, both vent one and vent two are in an open state, enabling the air and n-butane to flow normally in the two cavities. During sampling, sampling at different positions can be carried out through multiple gas pipes, or vent two can be closed, and then the upper layer gas is sampled through vent one, or vent one can be closed, and then the lower layer gas is sampled through vent two, realizing multi-point sampling detection of the mixed gas.

[0033] 4. The present invention is provided with a stirring assembly. The rotation of the scraper can stir the gas at the lower end of the mixing cavity, avoiding stratification of the air and n-butane due to density differences, improving the mixing uniformity of the air and n-butane. At the same time, the impurities settled on the bottom plate can be scraped into the receiving groove for temporary storage, realizing the separation of the gas and impurities and improving the mixing quality. Description of the Drawings

[0034] Figure 1 is the overall structural schematic diagram of the present invention.

[0035] Figure 2It is a schematic structural diagram of the present invention cut longitudinally.

[0036] Figure 3 It is a schematic assembly structure diagram of the mixing cylinder and the mixing mechanism of the present invention.

[0037] Figure 4 It is a schematic structural diagram of the air duct of the present invention.

[0038] Figure 5 It is a schematic assembly structure diagram of the seal and the air duct of the present invention.

[0039] Figure 6 It is a schematic assembly structure diagram of the air duct and the movable rod of the present invention.

[0040] Figure 7 It is of the present invention Figure 6 The enlarged structural diagram at position A in

[0041] Figure 8 It is a schematic diagram when the movable rod of the present invention closes the through hole.

[0042] Figure 9 It is a schematic structural diagram of the driving structure of the present invention.

[0043] Figure 10 It is a schematic structural diagram of the stirring assembly of the present invention.

[0044] Figure 11 It is a schematic structural diagram of the bottom plate of the present invention.

[0045] Reference numerals:

[0046] 1. Mixing cylinder; 11. First air inlet; 12. Second air inlet; 13. Air outlet; 14. Top plate; 15. Bottom plate; 151. Accommodating groove; 16. Impurity discharge port; 2. Partition board; 21. First driving member; 3. Air duct; 301. First installation groove; 302. Second installation groove; 31. First ventilation port; 32. Second ventilation port; 33. Through hole; 331. Upper through hole; 332. Lower through hole; 34. First gear; 35. Second gear; 36. Second driving member; 4. Seal; 41. First baffle; 42. Second baffle; 43. Torsion spring; 5. Movable rod; 501. Through port; 502. Exhaust port; 51. Third driving member; 52. First elastic member; 6. Rotating shaft; 61. Scraper; 62. Fourth driving member; 63. Second elastic member. Detailed Description of the Invention

[0047] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] As Figures 1 to 11As shown in the figure, a n-butane and air mixing device of the present invention includes a housing, a mixing cylinder 1, and a mixing mechanism disposed inside the mixing cylinder 1.

[0049] The mixing cylinder 1 is installed inside the housing. A mixing chamber is provided inside the mixing cylinder 1. The mixing cylinder 1 is provided with an air inlet 11 for introducing air and an air inlet 12 for introducing n-butane, so that air and n-butane can fully contact and mix therein. The mixing mechanism is used to mix the air and n-butane inside the mixing cylinder 1 to ensure the mixing uniformity.

[0050] As Figures 2 to 5 shown, the mixing mechanism includes a partition 2, a driving member 21, and a mixing assembly. The partition 2 is longitudinally movably installed in the mixing chamber, dividing the mixing chamber into an upper cavity 1 and a lower cavity 2. The upper cavity 1 communicates with the air inlet 11, and the lower cavity 2 communicates with the air inlet 12, capable of storing air and n-butane respectively, and providing initial gases for the subsequent mixing process. The driving member 21 is installed on the mixing cylinder 1. The output end of the driving member 21 extends vertically and is connected to the partition 2, for driving the partition 2 to move up and down. The driving member 21 can be a cylinder, an electric push rod, etc.

[0051] Among them, the mixing assembly includes a plurality of air guide pipes 3, a driving structure, and a seal 4. Each air guide pipe 3 is longitudinally rotatably installed in the mixing chamber, and the upper end extends to the outside of the mixing cylinder 1 to form an air outlet 13. Each air guide pipe 3 movably penetrates through the partition 2. Each air guide pipe 3 is hollow inside, and the upper and lower ends of each air guide pipe 3 are respectively provided with an air vent 31 and an air vent 32. When the partition 2 is at the uppermost end of the mixing chamber, the partition 2 can close the air vent 31, and when the partition 2 is at the lowermost end of the mixing chamber, the partition 2 can close the air vent 32. A plurality of through holes 33 are provided on the side wall of each air guide pipe 3. One end of the seal 4 is rotatably installed on the air guide pipe 3. When the seal 4 is in a vertical state, the seal 4 fits against the side wall of the air guide pipe 3. At this time, the through holes 33 can be closed by the seal 4, and a space is provided for the partition 2 to avoid interference with the up and down movement of the partition 2. When the seal 4 is in an inclined state, there is a certain angle between the seal 4 and the air guide pipe 3. At this time, the air guide pipe 3 can be driven to rotate by the driving structure, and then the seal 4 is driven to rotate synchronously to stir the gas in the mixing chamber, so that air and n-butane are further mixed.

[0052] Specifically, air is introduced into cavity one from air inlet one 11, and at the same time, n-butane is introduced into cavity two from air inlet two 12. Then, driving member one 21 drives partition 2 to move downward. As partition 2 moves downward, the space of cavity two gradually decreases, and n-butane is forced to enter cavity one through through-hole 33 provided on the side wall of gas guide pipe 3. After n-butane enters cavity one, it is preliminarily mixed with the air in cavity one. Then, driving member one 21 drives partition 2 to move up and down repeatedly, causing the air and n-butane to transfer repeatedly between cavity one and cavity two, promoting the flow of gas between the two cavities, increasing the contact opportunity between air and n-butane, and realizing their mixing.

[0053] During the mixing process, when partition 2 is away from seal 4, seal 4 is in an inclined state. At this time, through the rotation of seal 4, air and n-butane can be further mixed. When partition 2 moves to seal 4, seal 4 can rotate to a vertical state to make way.

[0054] After mixing is completed, seal 4 switches to a vertical state to close through-hole 33, providing a basis for the subsequent sampling process. Since multiple gas guide pipes 3 are installed at different positions in the mixing cavity, when sampling through the air outlet 13 formed at the upper end of each gas guide pipe 3, the mixed gas at different positions in the mixing cavity can be sampled. In addition, when partition 2 is at the uppermost end of the mixing cavity, partition 2 can close air inlet one 31. At this time, by opening air outlet 13, the mixed gas at the lower end of the mixing cavity can be extracted through air inlet two 32, so as to sample the lower-layer gas. When partition 2 is at the uppermost end of the mixing cavity, partition 2 can close air inlet two 32. At this time, by opening air outlet 13, the mixed gas at the upper end of the mixing cavity can be extracted through air inlet one 31, so as to sample the upper-layer gas. Separately extracting the upper-layer or lower-layer gas can provide concentration information of a specific area, which helps to evaluate the uniformity of the gas in the mixing cavity. When partition 2 is at the middle position of the mixing cavity, both air inlet one 31 and air inlet two 32 are in an open state. At this time, by opening air outlet 13, the gas at the upper and lower ends of the mixing cavity can be extracted simultaneously, providing a more comprehensive sampling result, and further verifying the mixing condition of the gas in the mixing cavity.

[0055] After sampling is completed, open air outlet 13, extract the gas in the mixing cavity through air inlet one 31 and air inlet two 32, and discharge the uniformly mixed gas from mixing cylinder 1 for subsequent use or treatment.

[0056] Such as Figures 3 to 5As shown in the figure, a plurality of first mounting grooves 301 are provided along the circumferential direction of the upper part of the air guide pipe 3, and a plurality of second mounting grooves 302 are provided along the circumferential direction of the lower part of the air guide pipe 3. Both the first mounting grooves 301 and the second mounting grooves 302 are arranged along the axial direction of the air guide pipe 3. The upper ends of the plurality of first mounting grooves 301 are located at the same height, and the distance between the upper end of the first mounting groove 301 and the upper end of the mixing chamber is less than the thickness of the partition plate 2. The lower ends of the plurality of second mounting grooves 302 are located at the same height, and the distance between the lower end of the second mounting groove 302 and the lower end of the mixing chamber is less than the thickness of the partition plate 2. The through hole 33 includes a plurality of upper through holes 331 provided in the first mounting groove 301 and a plurality of lower through holes 332 provided in the second mounting groove 302.

[0057] Further, the seal 4 includes a first baffle 41 provided in the first mounting groove 301 and a second baffle 42 provided in the second mounting groove 302. The lower end of the first baffle 41 is hinged to the air guide pipe 3, and the upper end of the second baffle 42 is hinged to the air guide pipe 3, and torsion springs 43 are provided at the hinge points, so that in the initial state, both the first baffle 41 and the second baffle 42 are in an inclined state.

[0058] Specifically, during the upward movement of the partition plate 2, when the partition plate 2 moves to the lower end of the first mounting groove 301, the partition plate 2 can push the first baffle 41 to rotate around the hinge point, so that the first baffle 41 retracts into the first mounting groove 301 in a vertical state to make way, and at the same time closes the upper through hole 331. When the partition plate 2 is at the uppermost end of the mixing chamber, since the thickness of the partition plate 2 is greater than the distance between the upper end of the first mounting groove 301 and the upper end of the mixing chamber, the partition plate 2 can continue to limit the first baffle 41 to keep the first baffle 41 in a vertical state. At this time, the first baffle 41 will not open outward under the action of the torsion spring 43, thereby ensuring that the subsequent partition plate 2 can move down smoothly. During this process, the second baffle 42 is in an inclined state and can be driven to rotate by the rotation of the air guide pipe 3, so that the air in the second cavity is further mixed with the n-butane.

[0059] During the downward movement of the partition plate 2, the first baffle 41 gradually gets out of the limit of the partition plate 2. At this time, the first baffle 41 can be in an inclined state again under the action of the torsion spring 43 and rotate synchronously with the rotation of the air guide pipe 3, so that the air in the first cavity is further mixed with the n-butane. When the partition plate 2 moves to the upper end of the second mounting groove 302, the partition plate 2 can push the second baffle 42 to rotate around the hinge point, so that the second baffle 42 retracts into the second mounting groove 302 in a vertical state to make way, and at the same time closes the lower through hole 332. When the partition plate 2 is at the lowermost end of the mixing chamber, since the thickness of the partition plate 2 is greater than the distance between the lower end of the second mounting groove 302 and the lower end of the mixing chamber, the partition plate 2 can continue to limit the second baffle 42 to keep the second baffle 42 in a vertical state. At this time, the second baffle 42 will not open outward under the action of the torsion spring 43, thereby ensuring that the subsequent partition plate 2 can move up smoothly.

[0060] AsFigures 3 to 5 As shown, further, the lengths of the multiple first mounting grooves 301 are different, and the length of each first baffle 41 is adapted to the length of the corresponding first mounting groove 301. Since the upper ends of each first mounting groove 301 are at the same height, the lower ends of each first mounting groove 301 are at different heights. When the partition plate 2 moves upward, the partition plate 2 will first move to the lower end of the longest first mounting groove 301 and push the first baffle 41 located in this first mounting groove 301 to rotate to a vertical state, so that the first baffles 41 of different lengths can be closed in sequence from long to short. Similarly, the lengths of the multiple second mounting grooves 302 are different, and the length of each second baffle 42 is adapted to the length of the corresponding second mounting groove 302. Since the lower ends of each second mounting groove 302 are at the same position, the upper ends of each second mounting groove 302 are at different heights. When the partition plate 2 moves downward, it can push the second baffles 42 of different lengths to be closed in sequence from long to short. Therefore, during the up and down movement of the partition plate 2, the number of the upper through holes 331 or the lower through holes 332 in the open state can be gradually reduced through the sequential closing of the first baffle 41 and the second baffle 42, without causing multiple upper through holes 331 to be closed simultaneously or multiple lower through holes 332 to be closed simultaneously, ensuring that the gas can flow normally in the first cavity and the second cavity, and further ensuring the mixing effect of air and n-butane.

[0061] As Figures 2 to 5 , Figure 9 shown, a top plate 14 is fixedly installed at the upper end of the mixing chamber. The air duct 3 rotates through the top plate 14. An installation cavity is formed between the top plate 14 and the upper end of the mixing chamber. The driving structure is arranged in the installation cavity. In this embodiment, one of the air ducts 3 is installed at the axis of the mixing cylinder 1, and the remaining air ducts 3 are evenly installed along the circumference of the mixing cylinder 1. The driving structure includes a first gear 34, a second gear 35 and a second driving member 36. The first gear 34 and the second gear 35 are both rotatably installed on the top plate 14. The first gear 34 is provided with a plurality of gears, and each first gear 34 is fixedly sleeved on the corresponding air duct 3. The gear sleeved on the air duct 3 at the axis is defined as the central gear, and the gears sleeved on the remaining air ducts 3 are defined as the circumferential gears. The second gear 35 is provided with a plurality of gears. Each second gear 35 is located between the central gear and the corresponding circumferential gear and meshes with the central gear and the corresponding circumferential gear for transmission. The second driving member 36 is installed on the mixing cylinder 1, and the output end is connected to one of the second gears 35 for driving it to rotate. The second driving member 36 can be a motor.

[0062] Specifically, the second driving member 36 is started to drive the second gear 35 connected thereto to rotate, and the rotation of the second gear 35 can drive the central gear and the corresponding circumferential gear meshing therewith to rotate, and the rotation of the central gear can drive the other second gears 35 to rotate, and then drive the other circumferential gears to rotate, so that the multiple air guide tubes 3 rotate synchronously. Therefore, only one driving source is needed to drive the multiple air guide tubes 3 to rotate, and then drive the sealing member 4 in a tilted state to rotate, so as to stir the gas in the mixing chamber and promote gas mixing.

[0063] like Figures 3 to 8 As shown, when it is necessary to perform multi-point sampling on the mixed gas in the mixing chamber, it is necessary to make the multiple through holes 33 all in a closed state, so that the upper or lower gas can be sampled separately through the vent 1 31 and the vent 2 32. Therefore, the lower end of each air duct 3 is suspended, and a movable rod 5 is longitudinally slidably installed in each air duct 3, the lower end of the movable rod 5 penetrates the lower end of the air duct 3 and extends outward, and a plurality of through openings 501 are provided on the side wall of the movable rod 5. A bottom plate 15 is longitudinally slidably installed at the lower end of the mixing chamber, and the top plate 14 and the bottom plate 15 constitute the upper and lower boundaries of the mixing chamber. A driving member 3 51 is provided at the bottom of the mixing barrel 1, and the output end of the driving member 3 51 extends vertically upward and is connected to the bottom plate 15. The driving member 3 51 can be a cylinder, an electric push rod, etc. In the initial state, the through-hole 501 is aligned with the through-hole 33, and the through-hole 33 is in an open state. When the bottom plate 15 moves upward, it can push the movable rod 5 to move upward, so that the through-hole 501 is staggered with the through-hole 33, and the through-hole 33 is in a closed state. An elastic member 52 is provided between the upper end of the movable rod 5 and the mixing barrel 1. The elastic force direction of the elastic member 52 is the same as the sliding direction of the movable rod 5. The elastic member 52 can be a spring, which is used to drive the movable rod 5 to reset.

[0064] Specifically, in the initial state, the output end of the driving member 3 51 is retracted, so that the bottom plate 15 is located at the bottom of the mixing chamber. At this time, the bottom plate 15 does not contact the lower end of the movable rod 5. The movable rod 5 is located at the initial position under the action of the elastic member 1 52, so that the through-port 501 is aligned with the through-hole 33, so that the through-hole 33 is in an open state. At this time, air and n-butane can flow normally in the two cavities. When sampling, the driving member 3 51 is started, so that the output end of the driving member 3 51 extends, driving the bottom plate 15 to move upward. When the bottom plate 15 contacts the lower end of the movable rod 5, it can push the movable rod 5 to move upward, so that the elastic member 1 52 is compressed and stored, and the through-port 501 and the through-hole 33 are staggered, so that the through-hole 33 is in a closed state. At this time, the upper or lower gas can be sampled separately through the vent 1 31 and the vent 2 32.

[0065] like Figures 3 to 8As shown, when the gas in the mixing chamber needs to be discharged to the outside, the air outlet 13 is opened, and the mixed gas in the mixing chamber will enter the air duct 3 through the air vent 1 31, the air vent 2 32 and the through hole 33, and then be discharged to the outside through the air outlet 13. Since there may be some areas in the mixing chamber that are difficult to be completely swept by the air flow, such as the corners of the mixing chamber or the surroundings of the air duct 3, the gas may be retained in these areas and cannot be completely discharged. Therefore, an exhaust port 502 is provided at the lower end of the movable rod 5. When the movable rod 5 moves upward so that the through port 501 is staggered with the through hole 33, the air vent 1 31 is aligned with the side wall of the movable rod 5, so that the air vent 1 31 is in a closed state, and the air vent 2 32 is aligned with the exhaust port 502, so that the air vent 2 32 remains in an open state.

[0066] Specifically, when the mixed gas needs to be discharged outward, the partition 2 is driven to move upward by the driving member 21, so that the partition 2 is located at the uppermost end of the mixing chamber. Then, the movable rod 5 is driven to move upward by the driving member 3 51, so that the through-port 501 and the through hole 33 are staggered, and at the same time, the vent 1 31 is aligned with the side wall of the movable rod 5, and the vent 2 32 is aligned with the exhaust port 502. At this time, the through hole 33 and the vent 1 31 are both in a closed state, and the vent 2 32 is in an open state. Then, the partition 2 is driven to move downward by the driving member 21, so that the space below the partition 2 is gradually reduced. At this time, the mixed gas below the partition 2 will enter the air duct 3 through the vent 2 32. In this process, air can be introduced to the top of the partition 2 through the air inlet 11 to ensure that the partition 2 can move downward smoothly. Since the vent 1 31 and the through hole 33 are both in a closed state, the mixed gas entering the air duct 3 can only be discharged outward through the gas outlet 13, and when the partition 2 moves to the lowest end of the mixing chamber, the gas in the mixing chamber is completely discharged. By moving the partition 2 downward, the gas in the mixing chamber can be gradually discharged, reducing the retention of gas in the mixing chamber and ensuring the discharge effect of the mixed gas.

[0067] like Figure 3 , Figure 10 and Figure 11 As shown, a stirring assembly is provided at the bottom of the mixing drum 1, and the stirring assembly includes a rotating shaft 6, a scraper 61 and a driving member 4 62. The rotating shaft 6 is arranged to rotate longitudinally and penetrate the bottom of the mixing drum 1. The scraper 61 is provided in a plurality and is installed on the rotating shaft 6 at intervals along the circumference of the rotating shaft 6. The driving member 4 62 is installed on the mixing drum 1, and the output end extends vertically upward. The rotating shaft 6 and the output end of the driving member 4 62 are longitudinally slidably matched and are anti-rotation matched. A receiving groove 151 for accommodating the scraper 61 is provided on the bottom plate 15, and an elastic member 2 63 is provided between the rotating shaft 6 and the output end of the driving member 4 62, so that in the initial state, the scraper 61 extends to the top of the receiving groove 151, and the elastic member 2 63 can be a spring.

[0068] Specifically, in the initial state, the bottom plate 15 is located at the bottommost end of the mixing cavity. Since the lower end of the air duct 3 is suspended, the rotating shaft 6 can be located at the initial position under the action of the second elastic member 63, so that the scraping plate 61 extends above the receiving groove 151. During the mixing process, the fourth driving member 62 is started to drive the rotating shaft 6 to rotate, and then drive the scraping plate 61 to rotate, stirring the gas at the bottom of the mixing cavity to prevent stratification of n-butane and air due to density differences, making the gas concentration distribution more uniform. During sampling, the fourth driving member 62 is turned off, so that the rotating shaft 6 and the scraping plate 61 stop rotating. At this time, the scraping plate 61 is again located above the receiving groove 151. Then, the bottom plate 15 is driven to move upward by the third driving member 51. During this process, the rotating shaft 6 and the scraping plate 61 will be blocked by the air duct 3 and gradually retracted into the receiving groove 151 to make way for the upward movement of the bottom plate 15 until the bottom plate 15 contacts the lower end of the air duct 3.

[0069] As Figure 3 , Figure 10 and Figure 11 shown, the gas introduced into the mixing cavity may contain impurities. Since the density of impurities is usually greater than that of the gas, during the mixing process, the impurities will gradually sink under the action of gravity and accumulate on the upper end of the bottom plate 15. Therefore, the lower end of the scraping plate 61 can contact the upper end of the bottom plate 15. A waste discharge port 16 is provided at the bottom of the mixing cylinder 1, and the waste discharge port 16 is communicated with the inside of the receiving groove 151. When the scraping plate 61 rotates, the impurities falling on the bottom plate 15 can be gradually scraped into the receiving groove 151 for temporary storage. During the sampling process, when the scraping plate 61 retracts into the receiving groove 151, the receiving groove 151 can be closed to separate the impurities from the gas above. Then, the waste discharge port 16 is opened, and the waste discharge port 16 is connected to a negative pressure device, so that the impurities temporarily stored in the receiving groove 151 can be discharged outwards.

[0070] As Figures 1 to 11 shown, the present invention also provides a method for mixing n-butane and air using the above mixing device, which specifically includes the following steps:

[0071] S1. Introduce gas: In the initial state, according to the amount of air and n-butane to be introduced, the partition plate 2 is moved to the set position so that there is enough space in both the first cavity and the second cavity for the gas to be introduced. Then, the air outlet 13 is closed, and air is introduced into the first cavity from the first air inlet 11, and at the same time, n-butane is introduced into the second cavity from the second air inlet 12;

[0072] S2. Mixing: Drive the partition plate 2 to move downward by the first driving member 21. As the space of the second cavity decreases, n-butane will flow into the interior of the first cavity through the through holes 33 on the side wall of the air duct 3, come into contact with and mix with the air in the first cavity until the partition plate 2 moves to the lowermost end of the mixing cavity. At this time, all the n-butane has flowed into the first cavity. Then drive the partition plate 2 to move up and down repeatedly in the mixing cavity by the first driving member 21, so that the air and n-butane are repeatedly transferred between the first cavity and the second cavity, and during this process, uniform mixing of the air and n-butane is achieved;

[0073] S3. Stirring: During the mixing process, the seal 4 is in an inclined state and can be driven to rotate by the rotation of the air duct 3 to stir the gas in the mixing cavity, so that the air and n-butane are further mixed. When the partition plate 2 moves to the seal 4, the seal 4 rotates to an inclined state to make way, avoiding interference with the partition plate 2;

[0074] S4. Sampling: After mixing is completed, close all the through holes 33, and then drive the partition plate 2 to move to the lowermost end of the mixing cavity by the first driving member 21, so that the second air vent 32 is closed. At this time, open the air outlet 13, and sampling of the upper-layer gas can be carried out through the first air vent 31. Then drive the partition plate 2 to move to the uppermost end of the mixing cavity by the first driving member 21, so that the first air vent 31 is closed. At this time, open the air outlet 13, and sampling of the lower-layer gas can be carried out through the second air vent 32. In addition, sampling at different positions can be achieved through different air ducts 3 to realize multi-point sampling detection of the mixed gas;

[0075] S5. Exhaust: When it is necessary to exhaust the mixed gas outward, open the air outlet 13 to extract the gas in the mixing cavity. The uniformly mixed gas can enter the air duct 3 through the first air vent 31, the second air vent 32 and the through holes 33, and then be discharged outward from the air outlet 13.

[0076] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A n-butane and air mixing device, comprising a mixing cylinder, a mixing chamber is arranged inside the mixing cylinder, and an air inlet one and an air inlet two are arranged on the mixing cylinder, and it is characterized in that, Also included is a mixing mechanism, the mixing mechanism including a partition, a driving member and a mixing assembly; The partition is longitudinally movably installed in the mixing chamber, dividing the mixing chamber into cavity one and cavity two from top to bottom, and cavity one is communicated with air inlet one, and cavity two is communicated with air inlet two. The driving member one is used to drive the partition to move up and down; The mixing assembly includes a plurality of air guide tubes and a sealing member, each of which is longitudinally rotatably installed in the mixing chamber, and the upper end of which extends to the outside of the mixing barrel to form an air outlet. The air guide tube movably penetrates the partition arrangement, and the interior of each air guide tube is hollow, and a vent 1 and a vent 2 are respectively arranged at the upper and lower ends, and the partition can close the vent 1 or the vent 2. A plurality of through holes are arranged on the side wall of the air guide tube, and one end of the sealing member is rotatably installed on the air guide tube, and when the sealing member is in a vertical state, it can make way for the partition and close the through hole, and when the sealing member is in an inclined state, it can stir the gas in the mixing chamber; The upper part of the air duct is provided with a plurality of mounting grooves 1, and the lower part of the air duct is provided with a plurality of mounting grooves 2, both of which are arranged along the axial direction of the air duct, and the distance between the upper end of the mounting groove 1 and the upper end of the mixing chamber is less than the thickness of the partition, and the distance between the lower end of the mounting groove 2 and the lower end of the mixing chamber is less than the thickness of the partition, the through hole includes an upper through hole arranged in the mounting groove 1, and a lower through hole arranged in the mounting groove 2, the sealing member includes a baffle 1 arranged in the mounting groove 1, and a baffle 2 arranged in the mounting groove 2, the lower end of the baffle 1 is hinged to the air duct, the upper end of the baffle 2 is hinged to the air duct, and a torsion spring is arranged at the hinge, so that in the initial state, the baffle 1 and the baffle 2 are both in an inclined state.

2. The butane and air mixing device according to claim 1, wherein, The length of each mounting groove 1 is different, and the length of each baffle 1 is adapted to the length of the corresponding mounting groove 1. The length of each mounting groove 2 is different, and the length of each baffle 2 is adapted to the length of the corresponding mounting groove 2. When the partition moves upward, multiple baffles 1 can be closed in sequence from long to short. When the partition moves downward, multiple baffles 2 can be closed in sequence from long to short.

3. The butane and air mixing device according to claim 1, wherein A top plate is fixedly installed on the upper end of the mixing chamber, and an air guide tube is rotatably arranged through the top plate. An installation cavity is formed between the top plate and the upper end of the mixing barrel, and a driving structure for driving the air guide tube to rotate is provided in the installation cavity. The driving structure includes gear one, gear two and driving member two. Gear one and gear two are both rotatably installed on the top plate, gear one is fixedly sleeved on the outer side of the air guide tube, gear two is meshed with gear one for transmission, driving member two is installed on the mixing barrel, and the output end is connected to gear two for driving gear two to rotate.

4. The butane and air mixing device according to claim 1, characterized in that, A movable rod is longitudinally slidably installed in the air guide tube, and a driving member three for driving the movable rod to move up and down is provided in the mixing barrel. A plurality of through holes are provided on the side wall of the movable rod. When the through holes are aligned with the through holes, the through holes are in an open state, and when the through holes are staggered with the through holes, the through holes are in a closed state.

5. The butane and air mixing device according to claim 4, characterized in that, The lower end of the air duct is suspended. The lower end of the movable rod passes through the lower end of the air duct and extends outwards. An elastic member I for driving the movable rod to reset is provided between the upper end of the movable rod and the mixing cylinder. A bottom plate is longitudinally slidably installed at the lower end of the mixing cavity. A driving member III is installed at the bottom of the mixing cylinder. The output end of the driving member III vertically extends upwards and is connected to the bottom plate. When the bottom plate moves upwards, it can push the movable rod upwards, causing the through hole to be staggered from the through opening.

6. The butane and air mixing device according to claim 5, characterized in that, An exhaust port is provided at the lower end of the movable rod. When the movable rod moves upwards, causing the through hole to be staggered from the through opening, the air vent I is aligned with the side wall of the movable rod, causing the air vent I to be in a closed state, and the air vent II is aligned with the exhaust port, causing the air vent II to remain open.

7. A n-butane and air mixing device according to claim 6, characterized in that, A stirring assembly is provided at the bottom of the mixing cylinder. The stirring assembly includes a rotating shaft, a scraping plate, and a driving member IV. The rotating shaft longitudinally rotates through the bottom of the mixing cylinder. A plurality of scraping plates are provided and are installed on the rotating shaft at intervals along the circumferential direction of the rotating shaft. The driving member IV is installed on the mixing cylinder, and its output end vertically extends upwards. The rotating shaft is longitudinally slidably and rotationally restrictedly engaged with the output end of the driving member IV. A receiving groove for accommodating the scraping plate is provided on the bottom plate. An elastic member II for driving the rotating shaft to longitudinally reset is provided between the rotating shaft and the output end of the driving member IV, such that in the initial state, the scraping plate extends above the receiving groove.

8. The butane and air mixing device according to claim 7, characterized in that, The lower end of the scraping plate can contact the upper end of the bottom plate. A waste discharging port is provided at the bottom of the mixing cylinder. The waste discharging port communicates with the inside of the receiving groove.

9. A method for mixing n-butane and air, characterized in that, Using a n-butane and air mixing device according to any one of the above claims 1-8, the following steps are included: S1. Gas introduction: Air is introduced into the cavity I from the air inlet I, and at the same time, n-butane is introduced into the cavity II from the air inlet II. S2. Mixing: The partition plate is driven to move downwards by the driving member I. The n-butane will enter the cavity I through the through opening on the side wall of the air duct and mix with the air in the cavity I. Then, the partition plate is driven by the driving member I to repeatedly move up and down, causing the air and n-butane to repeatedly transfer between the cavity I and the cavity II, and during the process, the mixing of air and n-butane is achieved. S3. Stirring: During the mixing process, the sealing member is in an inclined state and can be driven to rotate by the rotation of the air duct, causing the air and n-butane to be further mixed. When the partition plate moves to the position of the sealing member, the sealing member can turn to a vertical state to make way. S4. Sampling: After mixing is completed, sampling at different positions is performed through a plurality of air ducts, sampling of the upper-layer gas is performed through the air vent I, and sampling of the lower-layer gas is performed through the air vent II, realizing multi-point sampling detection of the mixed gas. S5. Exhaust: The mixed gas is exhausted outwards through the air outlet.

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