A high-purity oxygen production adsorption tower

Abstract

The present invention relates to the technical field of molecular sieve oxygen production, and discloses a high-purity oxygen production adsorption tower, including: a tower body, in which a partition plate distributed in the vertical direction is fixed, and the partition plate and the tower body enclose an air inlet cavity and a plurality of oxygen production cavities, and a horizontal oxygen production inlet pipe is fixed in the oxygen production cavity; an oxygen production wire mesh frame, sleeved outside the oxygen production inlet pipe; a rotating assembly, driving each oxygen production wire mesh frame to rotate; a communication assembly and a nitrogen extraction assembly. The high-purity oxygen production adsorption tower of the present invention sequentially conducts each oxygen production cavity through the communication assembly, so that after the compressed air is discharged through the oxygen production inlet pipe, it contacts the oxygen production molecular sieve in the storage cavity, continuously reduces the nitrogen content in the compressed air, and finally increases the oxygen concentration discharged from the air outlet. The rotating assembly drives each oxygen production wire mesh frame to rotate, so that the oxygen production molecular sieve everywhere can fully absorb the nitrogen in the compressed air discharged from the oxygen production inlet, ensuring that the adsorption amount of the nitrogen production molecular sieve everywhere is consistent, and further increasing the discharged oxygen concentration on the basis of reducing the difference.

Description

Technical Field

[0001] The present invention relates to the technical field of molecular sieve oxygen generation, and particularly to a high-purity oxygen generation adsorption tower. Background Art

[0002] The molecular sieve oxygen generation technology is an oxygen generation method based on the principle of pressure swing adsorption (PSA). Its working principle is to selectively adsorb air through a molecular sieve, effectively remove nitrogen, and thus collect high-purity nitrogen. In addition, a Chinese invention patent with the publication number CN118161954B discloses a high-purity oxygen generation component, which integrates a nitrogen absorption chamber, a buffer chamber, and an oxygen absorption chamber in an adsorption shell, reduces the occupied space and cost, and uses an on-off component to control the connection and disconnection between the chambers. First, most of the nitrogen is absorbed by the nitrogen absorption molecular sieve, and then the mixed gas with a reduced nitrogen concentration and an increased oxygen concentration is adsorbed by the oxygen absorption molecular sieve. After the oxygen absorption molecular sieve reaches saturation, the absorbed mixed gas is pumped away, thereby producing higher-purity oxygen.

[0003] In the above two oxygen generation methods, the molecular sieve is fixed in the adsorption tower, resulting in the adsorption efficiency of the molecular sieve near the compressed air inlet at the front stage being significantly higher than that of the molecular sieve far from the compressed air inlet. This makes the molecular sieve near the compressed air inlet easily reach the saturation state prior to the molecular sieve far from the compressed air inlet due to excessive adsorption. That is, generally speaking, the closer to the compressed air inlet, the easier it is to reach the saturation state, while a part of the remaining molecular sieve can continue to adsorb. When the adsorption tower operates, the adsorption states of the molecular sieves at various locations are significantly different. A part of them is prone to supersaturation. After this part reaches supersaturation, it is easy to release the adsorbed gas, affecting the operating state of the remaining molecular sieve, and ultimately affecting the oxygen concentration at the exhaust port of the adsorption tower. In addition, the molecular sieve has a certain service life. When the number of regeneration times reaches a certain number, the molecular sieve in the adsorption tower needs to be replaced. In the prior art, usually, the adsorption tower needs to be disassembled accordingly, the expired molecular sieve is discharged, and then new molecular sieve is replenished, resulting in extremely troublesome and difficult related operations such as the replacement and replenishment of the molecular sieve.

[0004] Therefore, it is necessary to improve the oxygen generation adsorption tower in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects existing in the prior art and provide a high-purity oxygen generation adsorption tower that ensures the consistency of the operating state of the molecular sieve and facilitates the replacement and replenishment of the molecular sieve.

[0006] To achieve the above technical effects, the technical solution of the present invention is: a high-purity oxygen generation adsorption tower, comprising:

[0007] Tower body, the tower body is a hollow structure, an air inlet and an air outlet are respectively arranged at the top and bottom of the tower body, an air inlet valve and an air outlet valve are respectively connected to the air inlet and the air outlet, a partition plate distributed along the vertical direction is fixed in the tower body, and the partition plate and the tower body enclose an air inlet cavity and a plurality of oxygen production cavities distributed along the vertical direction below the air inlet cavity. The air inlet is communicated with the air inlet cavity, the air outlet is communicated with the oxygen production cavity at the bottom, a horizontal oxygen production inlet pipe is fixed in the oxygen production cavity, an oxygen production inlet is arranged on the side wall of the oxygen production inlet pipe, and the aperture of the oxygen production inlet is smaller than the outer diameter of the oxygen production molecular sieve;

[0008] Oxygen production wire mesh frame, the oxygen production wire mesh frame is coaxially sleeved outside the oxygen production inlet pipe and is located in the air inlet cavity. The oxygen production wire mesh frame is densely provided with oxygen production outlets with apertures smaller than the outer diameter of the oxygen production molecular sieve. The oxygen production wire mesh frame rotates around its own center line on the oxygen production inlet pipe. The oxygen production wire mesh frame divides the oxygen production cavity into a storage cavity and an oxygen-rich cavity. The inner cavity of the oxygen production inlet pipe, the oxygen production inlet, the storage cavity, the oxygen production outlet and the oxygen-rich cavity are sequentially communicated. The storage cavity is used for storing oxygen production molecular sieve;

[0009] Rotating assembly, the rotating assembly drives each oxygen production wire mesh frame to rotate with the axis line of the oxygen production inlet pipe as the center line;

[0010] Connecting assembly and nitrogen extraction assembly, the connecting assembly is used to connect the air inlet cavity with the inner cavity of the oxygen production inlet pipe at the top and connect the oxygen-rich cavity at the higher position in the adjacent oxygen production cavities with the inner cavity of the corresponding oxygen production inlet pipe in contact. The nitrogen extraction assembly includes a negative pressure pump, and the input end of the negative pressure pump is communicated with the oxygen-rich cavity.

[0011] Preferably, in order to facilitate the compressed air to pass through the air inlet cavity and each oxygen production cavity in sequence during oxygen production, docking through holes distributed along the vertical direction are arranged on two opposite inner side walls of the tower body. The docking through holes include a first through hole, a second through hole and a third through hole. The first through hole is communicated with the air inlet cavity, the second through hole is fixedly communicated with the end of the oxygen production inlet pipe. Among adjacent two oxygen production cavities, the third through hole is communicated between the oxygen-rich cavity corresponding to the upper oxygen production cavity and the second through hole corresponding to the lower oxygen production cavity through the connecting assembly.

[0012] Preferably, in order to simplify the structure and facilitate assembly and splicing, the connecting component includes a connecting main pipe extending in the vertical direction and connecting branch pipes arranged side by side in the vertical direction. The connecting main pipe is communicated with the connecting branch pipes. One end of the connecting branch pipe far away from the connecting main pipe is communicated with the docking through holes in one-to-one correspondence. An oxygen-making check valve is arranged in the connecting branch pipe corresponding to the second through hole. An air inlet check valve and a sealing block are also arranged in the connecting main pipe at intervals in the vertical direction. Each air inlet check valve is arranged between two adjacent connecting branch pipes, and each sealing block is arranged between two adjacent connecting branch pipes. Each connecting branch pipe except the end part is located between the adjacent oxygen-making check valve and the sealing block.

[0013] Preferably, in order to facilitate the oxygen-making molecular sieves in each oxygen-making network frame to simultaneously discharge the adsorbed nitrogen after reaching the saturated state, the nitrogen extraction component includes a nitrogen extraction main pipe extending in the vertical direction and nitrogen extraction branch pipes arranged in sequence in the vertical direction. The nitrogen extraction main pipe is communicated with the input end of the negative pressure pump. Each nitrogen extraction branch pipe is communicated in one-to-one correspondence between the connecting branch pipe corresponding to the second through hole and the nitrogen extraction main pipe. The nitrogen extraction branch pipe is connected with a nitrogen extraction valve. The nitrogen extraction branch pipe is located on the side of the oxygen-making check valve far away from the second through hole.

[0014] Preferably, in order to further promote the regeneration of the oxygen-making molecular sieve, a purging through hole corresponding to the oxygen-rich cavity in one-to-one correspondence is further arranged on the tower body. The purging through hole is connected with a purging valve and is used for introducing inert gas.

[0015] Preferably, in order to drive the oxygen-making network frame to rotate and ensure the consistency of the adsorption state of the oxygen-making molecular sieve in the storage cavity, the rotating component includes a driven gear ring sleeved outside the oxygen-making inlet pipe coaxially and fixedly connected with the oxygen-making network frame, a driving gear rotating around its own axis in the oxygen-rich cavity and meshing with the driven gear ring, a driving gear meshing with one of the driving gears and located in the oxygen-rich cavity, a rotating unit for driving the driving gear to rotate, and a transmission unit arranged between two adjacent driving gears. Two adjacent driving gears are connected by the transmission unit.

[0016] Preferably, in order to drive each driving gear to rotate synchronously, the transmission unit includes two transmission wheels fixedly connected with two adjacent driving gears coaxially and located outside the oxygen-making cavity and a transmission connecting rod hinged between the two transmission wheels. The rotating component further includes a sealing cover. The sealing cover and the tower body enclose a sealed cavity. The transmission connecting rod and the transmission wheels are both located in the sealed cavity. The transmission wheels and the driving gears are fixedly connected by transmission concentric shafts. The transmission concentric shafts penetrate through the side wall of the tower body in a sealed manner.

[0017] Preferably, in order to facilitate the discharge of the oxygen - producing molecular sieve that is about to expire and at the same time facilitate the replenishment of the oxygen - producing molecular sieve, two inlets and outlets are provided at one end of the oxygen - producing wire frame. The central connection line of the two inlets and outlets is perpendicular to the axis of the oxygen - producing inlet pipe and the intersection point is the mid - point of the central connection line. Sealing rings are fixed on the side walls of the tower body facing the two inlets and outlets. Two communication ports distributed along the vertical direction are provided on the sealing rings. Feeding pipes and discharging pipes that are respectively located outside the tower body and correspond to the two communication ports one by one are fixedly arranged on the side walls of the tower body. Feeding plugs and discharging plugs are respectively detachably and sealingly connected to the feeding pipes and the discharging pipes. The movement path of the oxygen - producing wire frame includes a replacement station. Under the replacement station, the feeding pipe is communicated with one of the inlets and outlets through the upper communication port, and the discharging pipe is communicated with the other inlet and outlet through the lower communication port.

[0018] Preferably, in order to ensure that the oxygen - producing wire frame is in the replacement station when replacing the oxygen - producing molecular sieve, a visual window is provided on the side wall of the sealing cover facing the driving wheel. A replacement mark is provided on the visual window. A hinge shaft is provided on the surface of the driving wheel adjacent to the visual window. The end of the transmission connecting rod is hinged to the hinge shaft. Under the replacement station, the hinge shaft on at least one of the driving wheels is aligned with the replacement mark.

[0019] Preferably, in order to further ensure the consistency of the adsorption state of the oxygen - producing molecular sieve in the storage cavity, the oxygen - producing inlets are densely distributed at the bottom of the oxygen - producing inlet pipe. The oxygen - producing inlets are fixedly communicated with a downward main fork pipe. The main fork pipe is fixedly communicated with a fork pipe distributed along the axial direction of the main fork pipe. Shunt holes are provided on both the main fork pipe and the fork pipe. The inner diameter of the shunt hole is smaller than the outer diameter of the oxygen - producing molecular sieve.

[0020] In summary, compared with the prior art, the high - purity oxygen - producing adsorption tower of the present invention conducts each oxygen - producing cavity in sequence through the connection component, so that the compressed air contacts the oxygen - producing molecular sieve in the storage cavity after being discharged through the oxygen - producing inlet pipe, continuously reducing the nitrogen content in the compressed air, and finally increasing the oxygen concentration discharged from the air outlet. The rotation component drives each oxygen - producing wire frame to rotate, so that the oxygen - producing molecular sieves everywhere can fully absorb the nitrogen in the compressed air discharged from the oxygen - producing inlets, ensuring that the adsorption amounts of the nitrogen - producing molecular sieves everywhere are consistent, and further increasing the oxygen concentration discharged on the basis of reducing the difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the first embodiment;

[0022] Figure 2 is Figure 1 a perspective view of

[0023] Figure 3 is Figure 1Explosion schematic diagram;

[0024] Figure 4 is Figure 1 Schematic diagram of the sectional structure;

[0025] Figure 5 is Figure 4 Enlarged view of part A of

[0026] Figure 6 Schematic diagram of the structure of the tower body of the first embodiment;

[0027] Figure 7 Schematic diagram of the connection structure between the oxygen production grid and the rotating component of the first embodiment;

[0028] Figure 8 is Figure 7 Explosion schematic diagram;

[0029] Figure 9 Schematic diagram of the connection structure between the communication component and the nitrogen extraction component of the first embodiment;

[0030] Figure 10 is Figure 9 Explosion schematic diagram;

[0031] Figure 11 is Figure 9 Schematic diagram of the sectional structure;

[0032] Figure 12 Schematic diagram of the sectional structure of the tower body of the first embodiment;

[0033] Figure 13 Another schematic diagram of the sectional structure of the tower body of the first embodiment;

[0034] Figure 14 Schematic diagram of the second embodiment;

[0035] Figure 15 Side view of the second embodiment;

[0036] Figure 16 Schematic diagram of the sectional structure of the tower body of the second embodiment;

[0037] Figure 17 Schematic diagram of the sectional structure of the tower body of the second embodiment from another perspective;

[0038] Figure 18 Schematic diagram of the partial connection structure of the rotating component, oxygen production grid and oxygen production inlet pipe of the second embodiment;

[0039] Figure 19 is Figure 18 Explosion schematic diagram;

[0040] Figure 20It is a schematic diagram of the connection structure between the oxygen generation network frame and the oxygen inlet pipe in the third embodiment;

[0041] Figure 21 is Figure 20 explosion schematic diagram of;

[0042] Figure 22 is Figure 21 partial enlarged view of B of;

[0043] In the figure: 1. Tower body; 11. Tower shaft; 111. Air outlet; 112. Air outlet valve; 113. Docking through hole; 1131. First through hole; 1132. Second through hole; 1133. Third through hole; 114. Purge through hole; 115. Feeding pipe; 116. Discharge pipe; 117. Feeding plug; 118. Discharge plug; 12. Tower cover; 121. Air inlet; 122. Air inlet valve; 13. Support leg; 14. Bolt; 15. Nut; 16. Partition board; 17. Oxygen inlet pipe; 171. Oxygen inlet; 172. Main fork pipe; 173. Branch pipe; 174. Shunt hole; 18. Sealing ring; 181. Communication port; 2. Oxygen generation network frame; 21. Mesh cylinder; 211. Oxygen generation outlet; 22. End plate; 221. Inlet and outlet; 3. Rotating assembly; 31. Driven gear ring; 32. Driving gear; 321. Driving concentric shaft; 33. Driving gear; 34. Rotating unit; 341. Rotating motor; 342. Rotating concentric shaft; 343. Bearing; 344. Sealing cover; 35. Driving unit; 351. Driving wheel; 352. Driving connecting rod; 353. Hinge shaft; 36. Sealing cover; 361. Visual window; 362. Replacement mark; 4. Connecting assembly; 41. Connecting main pipe; 411. Intake check valve; 412. Sealing block; 42. Connecting branch pipe; 421. Oxygen generation check valve; 5. Nitrogen extraction assembly; 51. Negative pressure pump; 52. Nitrogen extraction main pipe; 53. Nitrogen extraction branch pipe; 531. Nitrogen extraction valve; 54. Nitrogen discharge pipe; 541. Nitrogen discharge valve; 6. Purge pipe; 61. Purge main pipe; 62. Purge branch pipe; 63. Purge valve. Specific embodiments

[0044] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0045] First embodiment

[0046] As Figures 1-13 shown, the high-purity oxygen generation adsorption tower of the first embodiment of the present invention includes:

[0047] Tower body 1, the tower body 1 is a hollow structure. An air inlet 121 and an air outlet 111 are respectively arranged at the top and bottom of the tower body 1. An air inlet valve 122 and an air outlet valve 112 are respectively connected to the air inlet 121 and the air outlet 111. A partition 16 distributed vertically is fixed inside the tower body 1. The partition 16 and the tower body 1 enclose an air inlet chamber and a number of oxygen generation chambers distributed vertically below the air inlet chamber. The air inlet 121 is communicated with the air inlet chamber, and the air outlet 111 is communicated with the oxygen generation chamber at the bottom. A horizontal oxygen generation inlet pipe 17 is fixed inside the oxygen generation chamber. An oxygen generation inlet 171 is arranged on the side wall of the oxygen generation inlet pipe 17, and the aperture of the oxygen generation inlet 171 is smaller than the outer diameter of the oxygen generation molecular sieve;

[0048] Oxygen generation wire frame 2, the oxygen generation wire frame 2 is coaxially sleeved outside the oxygen generation inlet pipe 17 and is located in the air inlet chamber. Oxygen generation outlets 211 with apertures smaller than the outer diameter of the oxygen generation molecular sieve are densely arranged on the oxygen generation wire frame 2. The oxygen generation wire frame 2 rotates around its own center line on the oxygen generation inlet pipe 17. The oxygen generation wire frame 2 divides the oxygen generation chamber into a storage chamber and an oxygen-enriched chamber. The inner cavity of the oxygen generation inlet pipe 17, the oxygen generation inlet 171, the storage chamber, the oxygen generation outlet 211 and the oxygen-enriched chamber are communicated in sequence. The storage chamber is used for storing the oxygen generation molecular sieve;

[0049] Rotation assembly 3, the rotation assembly 3 drives each oxygen generation wire frame 2 to rotate with the axis line of the oxygen generation inlet pipe 17 as the center line;

[0050] Connection assembly 4 and nitrogen extraction assembly 5, the connection assembly 4 is used to connect the air inlet chamber with the inner cavity of the oxygen generation inlet pipe 17 at the top and to connect the oxygen-enriched chamber at a higher position in the adjacent oxygen generation chambers with the inner cavity of the oxygen generation inlet pipe 17 in contact. The nitrogen extraction assembly 5 includes a negative pressure pump 51, and the input end of the negative pressure pump 51 is communicated with the oxygen-enriched chamber.

[0051] When the device is in use, open the intake valve 122 at the intake port 121 and the outlet valve 112 at the outlet port 111. After being filtered and purified, the compressed air first enters the intake cavity through the intake port 121, and then enters the interior of the oxygen production inlet pipe 17 of the oxygen production cavity adjacent to the lower part of the intake cavity through the connecting component 4, and is discharged from the oxygen production inlet 171 (the oxygen production inlets 171 are densely distributed along the axial direction of the oxygen production inlet pipe 17 at the bottom of the circumferential side wall of the oxygen production inlet pipe 17), enters the inner side of the oxygen production grid 2, that is, the storage cavity, contacts the oxygen production molecular sieve in the storage cavity, and the nitrogen in the compressed air is absorbed by the oxygen production molecular sieve, so that the oxygen concentration in the compressed air increases, and then is discharged from the oxygen production outlet 211, enters the oxygen-rich cavity. After that, the compressed air with increased oxygen concentration after adsorbing a part of nitrogen in the oxygen-rich cavity enters the lower oxygen production inlet pipe 17 through the connecting component 4, and then successively passes through the oxygen production inlet 171, the storage cavity, the oxygen production outlet 211 and the oxygen-rich cavity. While passing through the storage cavity, the oxygen production molecular sieve in the storage cavity continuously adsorbs the nitrogen in the compressed air, so that while the nitrogen concentration in the compressed air gradually decreases, the oxygen concentration gradually increases. Finally, after entering the oxygen-rich cavity in the bottommost oxygen production cavity, high-concentration oxygen is formed, and then the high-concentration oxygen is discharged downward through the outlet port 111.

[0052] While the compressed air passes through the inside of the tower body 1, the rotating component 3 is started to drive the oxygen production grid 2 in each oxygen production cavity to rotate, thereby changing the position of the oxygen production molecular sieve in the storage cavity, so that the air discharged from the oxygen production inlet 171 can face different oxygen production molecular sieves, that is, while the compressed air continuously discharges from the oxygen production inlet 171, the nitrogen in the compressed air is adsorbed by different oxygen production molecular sieves. By rotating the oxygen production grid 2, the oxygen production molecular sieve in the storage cavity can evenly adsorb the nitrogen in the compressed air. In this way, the difference in the amount of nitrogen adsorbed by the oxygen production molecular sieve in the storage cavity is reduced, so that the adsorption amount of each oxygen production molecular sieve remains uniform and consistent, and can reach the saturation state at the same time. In the saturation state, it is convenient to regenerate by discharging nitrogen. Therefore, it is avoided that while some oxygen production molecular sieves reach the saturation state, some other oxygen production molecular sieves do not reach the saturation state. When compressed air is introduced, the oxygen production molecular sieve that has reached the saturation state is easy to discharge the adsorbed nitrogen, while the oxygen production molecular sieve that has not reached the saturation state has limited nitrogen adsorption capacity, resulting in a limited oxygen concentration and a relatively high nitrogen concentration in the compressed air finally entering the negative pressure cavity. That is, by keeping the rotation of the oxygen production grid 2, the oxygen production molecular sieves at each place can reach the saturation state in the same time period, and then can be regenerated in the same time period, avoiding the limited oxygen concentration finally discharged due to excessive difference.

[0053] After the oxygen-making molecular sieve inside the oxygen-making wire frame 2 has been operating for a period of time and reaches a saturated state, the air outlet valve 112 and the air inlet valve 122 are closed, and the negative pressure pump 51 is started to extract the air in the oxygen-rich chamber. Since the inner cavities of the oxygen-rich chamber, the oxygen-making outlet 211, the storage chamber, the oxygen-making inlet 171, and the oxygen-making inlet pipe 17 are connected in sequence, it is possible to create a negative pressure in the oxygen-rich chamber and the storage chamber, facilitating the nitrogen adsorbed by the oxygen-making molecular sieve to be discharged and then discharged outside the tower body 1 through the output end of the negative pressure pump 51.

[0054] In this embodiment, the specific structure of the tower body 1 is as Figures 1-6 、 Figure 12 and Figure 13 shown. The tower body 1 includes a tower body 11 with an open top. The bottom of the tower body 11 is integrally connected with a support leg 13 extending in the vertical direction. The top of the tower body 11 is covered with a tower cover 12. The tower cover 12 and the tower body 11 are fixedly connected by bolts 14 and nuts 15 connected by threads. The air outlet 111 is arranged at the bottom of the tower body 11, and the air inlet 121 is arranged on the tower cover 12. A partition 16 is horizontally arranged inside the tower body 11. There are three partitions 16 equally spaced in the vertical direction. The outer circumference of the partition 16 is fixedly connected to the inner circumferential wall of the tower body 11, so that the tower body 11, the tower cover 12, and the three partitions 16 enclose an air inlet chamber at the top and three oxygen-making chambers distributed vertically below the air inlet chamber. Correspondingly, three oxygen-making inlet pipes 17 are provided in this embodiment, and are horizontally arranged one by one below the three partitions 16. The axis of the oxygen-making inlet pipe 17 is horizontal, and both ends are fixedly connected to two opposite inner side walls of the tower body 1.

[0055] Relatively, three oxygen-making wire frames 2 are provided, corresponding one by one to the three partitions 16. Of course, according to the height and width dimensions of the tower body 11, the partitions 16 can also be set to other multiple numbers, and the intervals of the partitions 16 can also be changed accordingly. The numbers of the partitions 16, the oxygen-making inlet pipes 17, and the oxygen-making wire frames 2 are equal and correspond one by one.

[0056] The specific structure of the oxygen-making wire frame 2 can be referred to Figures 2-5 、 Figure 7 and Figure 8As shown in the figure, the oxygen-making grid 2 includes a net cylinder 21 sleeved outside the oxygen-making inlet pipe 17. The circumferential side wall of the net cylinder 21 is densely provided with oxygen-making outlets 211 in the shape of through holes. Both ends of the net cylinder 21 are fixedly connected with end plates 22 that cover the ends of the net cylinder 21. The end plates 22 are annular, and their circumferential inner walls are hermetically connected to the oxygen-making inlet pipe 17. Moreover, the end plates 22, the oxygen-making inlet pipe 17, and the net cylinder 21 are coaxial, so that the above three enclose a storage cavity with an annular cross-section for storing oxygen-making molecular sieves. The particle size of the oxygen-making molecular sieves is larger than the inner diameters of the oxygen-making inlet 171 and the oxygen-making outlet 211. In this way, when the compressed air composed of oxygen and nitrogen enters the storage cavity from the oxygen-making inlet 171 of the oxygen-making inlet pipe 17, part of the nitrogen in the compressed air is absorbed by the oxygen-making molecular sieves, reducing the nitrogen concentration in the compressed air. After the corresponding oxygen concentration increases, it is then discharged through the oxygen-making outlet 211 and enters the oxygen-enriched cavity composed of the oxygen-making grid 2, the two adjacent partition plates 16, and the two inner side walls of the tower body 11 facing each other. That is, the oxygen concentration in the compressed air in the inner cavity of the oxygen-making inlet pipe 17, the storage cavity, and the oxygen-enriched cavity increases in turn. Based on the above principle, when the compressed air enters from the air inlet 121, passes through the air inlet cavity and the three oxygen-making cavities, and finally discharges from the air outlet 111, the oxygen concentration in the mixed compressed air gradually increases, and finally forms a gas mainly composed of high-concentration oxygen.

[0057] Furthermore, the improvement is that on the two inner side walls of the tower body 1 facing each other, docking through holes 113 are provided along the vertical direction. The docking through holes 113 include a first through hole 1131, a second through hole 1132, and a third through hole 1133. The first through hole 1131 communicates with the air inlet cavity, the second through hole 1132 is fixedly communicated with the end of the oxygen-making inlet pipe 17. Among the two adjacent oxygen-making cavities, the third through hole 1133 is communicated between the oxygen-enriched cavity corresponding to the upper oxygen-making cavity and the second through hole 1132 corresponding to the lower oxygen-making cavity through the connecting component 4.

[0058] Specifically, there are two sets of docking through holes 113, which are respectively arranged on the two side walls of the tower body 11 facing each other, as Figure 6As shown, the two sets of docking through-holes 113 each include a first through-hole 1131, three second through-holes 1132, and two third through-holes 1133. The first through-hole 1131 is located at the top and communicates with the air inlet chamber. The three second through-holes 1132 and the two third through-holes 1133 are equally spaced, and the distribution interval between adjacent second through-holes 1132 and third through-holes 1133 is the same as the distribution interval between the second through-hole 1132 at the top and the first through-hole 1131. The three second through-holes 1132 are fixedly connected to the end of the oxygen-making inlet pipe 17, facilitating the compressed air to enter the end of the oxygen-making inlet pipe 17 through the second through-holes 1132. The two third through-holes 1133 are respectively communicated with the two oxygen-rich chambers above (the bottommost oxygen-rich chamber is directly communicated with the air outlet 111, so there is no need to additionally set a third through-hole 1133). After the oxygen concentration is increased by adsorbing part of the nitrogen by the oxygen-making molecular sieve inside the oxygen-making mesh frame 2, the compressed air with increased oxygen concentration can enter the adjacent second through-hole 1132 below through the third through-hole 1133 via the connecting component 4, and then enter the storage chamber corresponding to the oxygen-making inlet pipe 17 through the oxygen-making inlet pipe 17 below, and contact the oxygen-making molecular sieve to further increase the oxygen concentration.

[0059] A further improvement is that the connecting component 4 includes a connecting main pipe 41 extending in the vertical direction and connecting branch pipes 42 arranged side by side in the vertical direction. The connecting main pipe 41 is communicated with the connecting branch pipes 42. One end of the connecting branch pipe 42 far from the connecting main pipe 41 is correspondingly communicated with the docking through-hole 113. An oxygen-making one-way valve 421 is arranged in the connecting branch pipe 42 corresponding to the second through-hole 1132. An air inlet one-way valve 411 and a sealing block 412 are also arranged in the connecting main pipe 41 at intervals in the vertical direction. Each air inlet one-way valve 411 is arranged between two adjacent connecting branch pipes 42, and each sealing block 412 is arranged between two adjacent connecting branch pipes 42. Except for the ends, each connecting branch pipe 42 is located between the adjacent oxygen-making one-way valve 421 and the sealing block 412.

[0060] Specifically, as Figures 1-5 、 Figures 9-11 shown, two connecting components 4 are provided and are respectively arranged on both sides of the tower body 11 and are connected to the two sets of docking through-holes 113 in a docking manner. Specifically, the connecting component 4 includes a connecting main pipe 41 and six connecting branch pipes 42. The six connecting branch pipes 42 are correspondingly communicated with the first through-hole 1131, the second through-hole 1132, and the third through-hole 1133, and the distribution interval of the six connecting branch pipes 42 is the same as the distribution interval between the adjacent second through-hole 1132 and the third through-hole 1133, which is convenient for docking. The connecting branch pipes 42 are preferably fixed to the outer side wall of the tower body 11 by welding to ensure that each connecting branch pipe 42 is docked and communicated with the corresponding docking through-hole 113.

[0061] An oxygen production one-way valve 421 is provided in the connecting branch pipe 42 corresponding to and communicating with the second through hole 1132. The oxygen production one-way valve 421 is used to define the flow direction of compressed air during the oxygen production process, so that the compressed air can only enter the oxygen production inlet pipe 17 from the connecting branch pipe 42. In the connecting main pipe 41, three intake one-way valves 411 and two sealing blocks 412 are arranged at intervals. The three intake one-way valves 411, the two sealing blocks 412, and the four connecting branch pipes 42 except at both ends are arranged at intervals in the vertical direction. The intake one-way valve 411 is used to define the air flow direction in the connecting main pipe 41, so that the compressed air can only flow from top to bottom.

[0062] After adopting the above structure, after the compressed air passes through the intake cavity and the first through hole 1131, it first enters the connecting main pipe 41 from the connecting branch pipe 42 at the top position, flows downward through the intake one-way valve 411, and the air flow direction is blocked by the sealing block 412, so that the compressed air passes through the oxygen production one-way valve 421 at the top position and enters the oxygen production inlet pipe 17 at the top. After passing through the storage cavity and the oxygen-rich cavity, it enters the connecting branch pipe 42 corresponding to and communicating with the third through hole 1133 through the third through hole 1133, and is blocked by the sealing block 412 and flows downward through the second intake one-way valve 411. In this way, the compressed air flows in a zigzag shape through the connecting assembly 4 and each oxygen production cavity. During the flowing process, it contacts the oxygen production molecular sieve in each storage cavity, thereby increasing the oxygen concentration in the compressed air.

[0063] A further improvement is that the nitrogen extraction assembly 5 includes a nitrogen extraction main pipe 52 extending in the vertical direction and nitrogen extraction branch pipes 53 distributed in sequence in the vertical direction. The nitrogen extraction main pipe 52 is communicated with the input end of the negative pressure pump 51. Each nitrogen extraction branch pipe 53 is correspondingly communicated between the connecting branch pipe 42 corresponding to and communicating with the second through hole 1132 and the nitrogen extraction main pipe 52. The nitrogen extraction branch pipe 53 is connected with a nitrogen extraction valve 531, and the nitrogen extraction branch pipe 53 is located on the side of the oxygen production one-way valve 421 away from the second through hole 1132.

[0064] Specifically, as Figures 1-3 、 Figure 9 and Figure 10 shown, in this embodiment, the nitrogen extraction main pipe 52 extends downward and is communicated with the input end of the negative pressure pump 51. There are three nitrogen extraction branch pipes 53, which correspond to the three oxygen production inlet pipes 17 and the three second through holes 1132 one by one. The nitrogen extraction branch pipe 53 is correspondingly communicated with the connecting branch pipe 42 corresponding to and communicating with the second through hole 1132, and the communication position is between the oxygen production one-way valve 421 and the second through hole 1132.

[0065] After adopting the above structure, when the oxygen-making molecular sieve in the storage cavity is adsorbed saturated or has been adsorbed and used for a certain period of time (the specific usage conditions can be determined according to the actual situation of users. For example, an oxygen concentration detector can be set at the air outlet 111 to detect the oxygen-making concentration, and when the concentration does not meet the standard, the oxygen-making is stopped for regeneration treatment), the intake valve 122 and the outlet valve 112 are closed, the negative pressure pump 51 is started and the nitrogen extraction valve 531 is opened. After the negative pressure pump 51 is started, the air in the oxygen-making inlet pipe 17 is extracted through a part of the nitrogen extraction main pipe 52, the nitrogen extraction branch pipe 53 and the communication branch pipe 42. At the same time, the rotating assembly 3 keeps the oxygen-making grid 2 rotating, so that the oxygen-making inlet pipe 17, the storage cavity and the oxygen-rich cavity form a negative pressure, which is beneficial to discharging the adsorbed by the oxygen-making molecular sieve, thereby promoting the regeneration of the oxygen-making molecular sieve, enabling the oxygen-making molecular sieve to restore its adsorption capacity for continuous oxygen-making use of the device. When nitrogen is discharged, the air in the storage cavity enters the oxygen-making inlet pipe 17 from the oxygen-making inlet 171, and after passing through the second through hole 1132, it is blocked by the oxygen-making one-way valve 421, so that after the air passes through a part of the communication branch pipe 42, it successively passes through the nitrogen extraction branch pipe 53 and the nitrogen extraction main pipe 52 and then enters the negative pressure pump 51, and then is discharged.

[0066] A further improvement is that the tower body 1 is also provided with a purging through hole 114 that is in one-to-one correspondence and communication with the oxygen-rich cavity. The purging through hole 114 is connected with a purging valve 63 and is used for introducing an inert gas.

[0067] Specifically, as Figure 1 、 Figure 3 and Figure 13 shown, the purging through hole 114 is arranged on one side of the tower body 11. A purging pipe 6 is also arranged on the same side of the tower body 11. The purging pipe 6 includes a purging main pipe 61 extending in the vertical direction and purging branch pipes 62 that are equally spaced in the vertical direction and extend in the horizontal direction. The purging branch pipes 62 are fixedly connected between the purging main pipe 61 and the purging through hole 114. The purging branch pipes 62 are in one-to-one correspondence and communication with the purging through hole 114. The purging valve 63 is arranged on the purging branch pipe 62.

[0068] After the negative pressure pump 51 is started for a period of time, the purging valve 63 is opened, and an inert gas is introduced into the purging main pipe 61, so that the inert gas is introduced into the oxygen-rich cavity through the purging main pipe 61 and the purging branch pipes 62, and blows from the outside to the rotating oxygen-making grid 2 to purge the oxygen-making molecular sieve in the storage cavity and remove the impurities attached to the oxygen-making molecular sieve to promote the regeneration of the oxygen-making molecular sieve. During the purging process, the inert gas and the impurities successively pass through the oxygen-making inlet 171, the oxygen-making inlet pipe 17, the nitrogen extraction branch pipe 53 and the nitrogen extraction main pipe 52, and are discharged by the negative pressure pump 51.

[0069] After the regeneration is completed, the purging valve 63 and the nitrogen extraction valve 531 are closed, and the intake valve 122 and the outlet valve 112 are opened, and the device can continue to carry out oxygen-making work.

[0070] A further improvement is that the output end of the negative pressure pump 51 is fixedly connected to two nitrogen exhaust pipes 54 , and both nitrogen exhaust pipes 54 are provided with nitrogen exhaust valves 541 .

[0071] In the early stage of regeneration of the oxygen-producing molecular sieve, before the purge valve 63 is opened, one of the nitrogen exhaust valves 541 is opened and the other nitrogen exhaust valve 541 is closed. At this time, the gas discharged by the negative pressure pump 51 is mainly the nitrogen adsorbed by the oxygen-producing molecular sieve, so the nitrogen concentration in the discharged gas is relatively high, and this part of the gas can be used for other industrial production activities. In the later stage of regeneration of the oxygen-producing molecular sieve, that is, after the purge valve 63 is opened, the working states of the two nitrogen exhaust valves 541 are switched, one of which is switched from closed to open, and the other is switched from open to closed. The gas discharged by the negative pressure pump 51 through the other nitrogen exhaust pipe 54 is a mixed gas of nitrogen, inert gas and a small amount of impurities. Since the nitrogen concentration in this part of the mixed gas is lower than that in the early stage and the purification cost is relatively high, it can be directly discharged to the outside.

[0072] A further improvement is that the rotating assembly 3 includes a driven gear ring 31 coaxially sleeved on the outside of the oxygen production inlet pipe 17 and fixedly connected to the oxygen production grid 2, a transmission gear 32 rotating around its own axis in the oxygen enrichment chamber and meshing with the driven gear ring 31, a driving gear 33 meshing with one of the transmission gears 32 and located in the oxygen enrichment chamber, a rotating unit 34 driving the driving gear 33 to rotate, and a transmission unit 35 arranged between two adjacent transmission gears 32, and the two adjacent transmission gears 32 are transmission connected through the transmission unit 35.

[0073] When the rotating assembly 3 is running, the rotating unit 34 is started, driving the driving gear 33 to rotate, so that the transmission gear 32 meshing with the driving gear 33 rotates, and the transmission gear 32 rotates through the transmission unit 35, thereby driving the driven gear ring 31 meshing with the transmission gear 32 to rotate, and the driven gear ring 31 is fixedly connected to the oxygen production grid 2 coaxially, so that the oxygen production grid 2 rotates.

[0074] A further improvement is that the transmission unit 35 includes two transmission wheels 351 which are fixedly connected to the coaxial center line of two adjacent transmission gears 32 and are located outside the oxygen production chamber, and a transmission connecting rod 352 which is hinged between the two transmission wheels 351. The rotating assembly 3 also includes a sealing cover 36, which is enclosed with the tower body 1 to form a sealed chamber. The transmission connecting rod 352 and the transmission wheel 351 are both located in the sealed chamber. The transmission wheel 351 and the transmission gear 32 are fixedly connected by a transmission coaxial shaft 321, and the transmission coaxial shaft 321 seals and passes through the side wall of the tower body 1.

[0075] Specifically, Figure 2 , Figure 3 , Figure 7 and Figure 8As shown in the figure, one end of the end plate 22 facing away from the mesh cylinder 21 is fixedly connected coaxially with a driven gear ring 31. The surface of the driven gear ring 31 facing away from the end plate 22 is in contact with the inner side wall of the tower body 11, thereby limiting the axial positions of the end plate 22 and the mesh cylinder 21 and ensuring the stable rotation of the oxygen production framework 2 around its own axis; at both ends inside the oxygen production cavity, transmission gears 32 are provided, and the transmission gears 32 are engaged with the driven gear ring 31.

[0076] The driving gears 33 are located at both ends inside the lowermost oxygen production cavity and are respectively engaged with the two transmission gears 32 in this oxygen production cavity. The rotating unit 34 includes a rotating motor 341, a rotating concentric shaft 342, and a bearing 343. The rotating concentric shaft 342 is fixedly penetrated through the two driving gears 33 coaxially, and both ends respectively penetrate the side walls of the tower body 11. Both ends of the rotating concentric shaft 342 are connected to the side walls of the tower body 11 through the bearings 343. The rotating motor 341 is fixed on one side of the tower body 11 and is fixedly connected coaxially with one end of the rotating concentric shaft 342. The sealing cover 344 is fixed on the other side of the tower body 11 and covers the part of the rotating concentric shaft 342 penetrating the tower body 11.

[0077] In the transmission unit 35, the transmission gear 32 and the transmission wheel 351 are coaxially arranged and are respectively in contact with the inner side wall and the outer side wall of the tower body 11. The transmission gear 32 and the transmission wheel 351 are fixedly connected through a transmission concentric shaft 321. The transmission concentric shaft 321 penetrates the side wall of the tower body 11 in a sealed manner. Both ends of the transmission connecting rod 352 are respectively hinged to the surface of the transmission wheel 351 facing away from the transmission gear 32 through two hinge shafts 353. The transmission unit 35 further includes a sealing cover 36. The sealing cover 36 and the outer side wall of the tower body 11 enclose a sealed cavity isolated from the outside world, enabling the transmission wheel 351 and the transmission connecting rod 352 to move safely and stably in the sealed cavity.

[0078] After adopting the above structure, when the rotating motor 341 in the rotating unit 34 starts, it drives the driving gears 33 at both ends to rotate through the rotating concentric shaft 342, acting on the lowermost transmission gear 32, causing the transmission wheel 351 connected coaxially with this transmission gear 32 to rotate. The transmission wheel 351 enables the two upper transmission wheels 351 to rotate synchronously through the transmission connecting rod 352, and further drives the two upper transmission gears 32 to rotate in unison with the lowermost transmission gear 32, enabling the oxygen production frameworks 2 in the three oxygen production cavities to rotate synchronously, facilitating the compressed air flowing out from the oxygen production inlet 171 to contact the oxygen production molecular sieves at various places in the storage cavity, ensuring that the nitrogen adsorbed by the oxygen production molecular sieves at various places is consistent, reducing the difference, enabling the oxygen production molecular sieves at various places to reach the saturated state at the same time period, facilitating synchronous regeneration while ensuring the oxygen concentration during the oxygen production process.

[0079] Second Embodiment

[0080] As Figures 14-19As shown in the figure, the high-purity oxygen generation adsorption tower of the second embodiment of the present invention is based on the first embodiment, and the difference lies in that two inlets and outlets 221 are provided at one end of the oxygen generation wire rack 2. The central connection line of the two inlets and outlets 221 is perpendicular to the axis line of the oxygen generation inlet pipe 17 and the intersection point is the midpoint of the central connection line. Sealing rings 18 are fixed on the side walls of the tower body 1 facing the two inlets and outlets 221. Two communication ports 181 distributed in the vertical direction are provided on the sealing rings 18. Feeding pipes 115 and discharging pipes 116 that correspond to the two communication ports 181 one by one and are respectively located outside the tower body 1 are fixedly arranged on the side walls of the tower body 1. Feeding plugs 117 and discharging plugs 118 are respectively detachably and sealingly connected to the feeding pipes 115 and the discharging pipes 116. The moving path of the oxygen generation wire rack 2 includes a replacement station. Under the replacement station, the feeding pipe 115 is communicated with one of the inlets and outlets 221 through the upper communication port 181, and the discharging pipe 116 is communicated with the other inlet and outlet 221 through the lower communication port 181.

[0081] After the oxygen generation molecular sieve reaches the service life or the regeneration times reach the limit, the oxygen generation and adsorption capacity of the oxygen generation molecular sieve drops significantly. Therefore, it is necessary to replace the oxygen generation molecular sieve in the storage cavity, so the above structure is adopted. Specifically, when the oxygen generation wire rack 2 rotates to the replacement station, the two inlets and outlets 221 are distributed in the vertical direction and are respectively communicated with the two communication ports 181. After removing the feeding plugs 117 and the discharging plugs 118, the expired oxygen generation molecular sieve in the storage cavity can pass through the lower inlet and outlet 221 and the communication port 181 in sequence from the oxygen generation cavity, and then be discharged from the discharging pipe 116. Then, a discharging plug 118 is fixedly installed on the discharging pipe 116, and unused oxygen generation molecular sieve is added into the feeding pipe 115, so that the oxygen generation molecular sieve can pass through the feeding pipe 115 and then enter the storage cavity through the upper communication port 181 and the inlet and outlet 221 in sequence. After filling the oxygen generation molecular sieve in the storage cavity, the feeding plug 117 is screwed on again, and the replacement and replenishment operation of the oxygen generation molecular sieve is completed. There is no need to disassemble and separate the tower body 11 and the tower cover 12, and only the feeding plug 117 and the discharging plug 118 need to be operated to complete the replacement, which is convenient to operate.

[0082] One end of the feeding pipe 115 and one end of the discharging pipe 116 are both fixed on the side wall of one side of the tower body 11. The other end of the feeding pipe 115 faces upward and is threadedly connected with a feeding plug 117. The other end of the discharging pipe 116 faces downward and is threadedly connected with a discharging plug 118. The feeding plug 117 is sealingly connected with the circumferential inner wall of the feeding pipe 115, and the discharging plug 118 is sealingly connected with the circumferential inner wall of the discharging pipe 116. In this way, while ensuring the sealing performance, it is convenient for the detachable connection between the feeding plug 117 and the feeding pipe 115 and the detachable connection between the discharging plug 118 and the discharging pipe 116, and further convenient for the old oxygen generation molecular sieve to be discharged through the discharging pipe 116 and the new oxygen generation molecular sieve to be replenished through the feeding pipe 115.

[0083] Such asFigures 16-19 As shown, a recess is provided on the side of the sealing ring 18 facing away from the oxygen production grid frame 2. The recess is convenient for accommodating the transmission gear 32 and the driving gear 33. This side of the sealing ring 18 is fixedly connected to the inner side wall of the tower body 11. Two communication holes corresponding to the two communication ports 181 are also provided on the side wall of the tower body 11. The two communication ports 181 are respectively communicated with the feeding pipe 115 and the discharging pipe 116 through the two communication holes. The other side of the sealing ring 18 is hermetically attached to one of the end plates 22 of the oxygen production grid frame 2, and the sealing ring 18 faces the two inlets and outlets 221. So that during the rotation of the oxygen production grid frame 2, except during the replacement station, the sealing ring 18 can block the two inlets and outlets 221, preventing the oxygen production molecular sieve from flowing out of the storage cavity through the two inlets and outlets 221 at other stations.

[0084] A further improvement is that a viewing window 361 is provided on the side wall of the sealing cover 36 facing the transmission wheel 351. A replacement mark 362 is provided on the viewing window 361. A hinge shaft 353 is provided on the surface of the transmission wheel 351 adjacent to the viewing window 361. The end of the transmission link 352 is hinged to the hinge shaft 353. During the replacement station, the hinge shaft 353 on at least one of the transmission wheels 351 faces the replacement mark 362.

[0085] Specifically, a viewing window 361 is provided on the side wall of the sealing cover 36 fixedly connected to the side wall of the tower body 11 corresponding to the communication port 181. The viewing window 361 faces the transmission wheel 351 located in the middle among the three transmission wheels 351 on this side. The replacement mark 362 is a horizontal groove-like structure passing through the axis of the transmission wheel 351.

[0086] Since the transmission gear 32 meshes with the driven gear ring 31, and the driven gear ring 31 is fixedly connected to the end plate 22, and the transmission wheel 351 is fixedly connected to the transmission gear 32, therefore, the rotational angular velocity of the oxygen production grid frame 2 and the rotational angular velocity of the transmission wheel 351 are in a certain proportional relationship. During design, the outer diameter ratio of the transmission gear 32 and the driven gear ring 31 is controlled, thereby controlling their rotational angular velocities. For example, when the outer diameters of the transmission gear 32 and the driven gear ring 31 are the same, their rotational angular velocities are the same, and the rotational angular velocity of the transmission wheel 351 and the oxygen production grid frame 2 is the same. At this time, by observing the position of the hinge shaft 353 on the transmission wheel 351 relative to the replacement mark 362 through the viewing window 361, the rotational angular position of the oxygen production grid frame 2 can be determined, and further the positional relationship of the two inlets and outlets 221 can be determined. In this embodiment, when the projection of the replacement mark 362 on the transmission wheel 351 coincides with the hinge shaft 353, it indicates that the two inlets and outlets 221 are distributed in the vertical direction. At this time, the oxygen production grid frame 2 is located at the replacement station. At this station, the rotation motor 341 can be controlled to stop running, so that the oxygen production grid frame 2 is maintained at the replacement station, facilitating the opening of the feeding plug 117 and the discharging plug 118 to replace the oxygen production molecular sieve in the storage cavity.

[0087] Third Embodiment

[0088] As Figures 20-22 shown, the high-purity oxygen generation adsorption tower of the third embodiment of the present invention, based on the second embodiment, is different in that the oxygen generation inlets 171 are densely distributed at the bottom of the oxygen generation inlet pipe 17. The oxygen generation inlets 171 are fixedly connected to a downward main fork pipe 172. The main fork pipe 172 is fixedly connected to a branch pipe 173 distributed along the axial direction of the main fork pipe 172. The main fork pipe 172 and the branch pipe 173 are both provided with shunt holes 174, and the inner diameter of the shunt holes 174 is smaller than the outer diameter of the oxygen generation molecular sieve.

[0089] In this embodiment, both the main fork pipe 172 and the branch pipe 173 are elastic pipes, preferably made of rubber material. When generating oxygen, after the compressed air flows out through the oxygen generation inlet 171, it enters the main fork pipe 172. A part enters the storage cavity through the shunt holes 174 on the main fork pipe 172, and the other part enters the branch pipe 173 and then enters the storage cavity through the shunt holes 174 on the branch pipe 173. The two parts of compressed air contact the oxygen generation molecular sieves at different positions in the storage cavity, further ensuring the uniformity of nitrogen adsorption by the oxygen generation molecular sieves in the storage cavity; moreover, after the oxygen generation grid 2 rotates, the main fork pipe 172 and the branch pipe 173 can drive the oxygen generation molecular sieves in contact with them to move, so that the positions of this part of the oxygen generation molecular sieves change. Compared with the prior art where the oxygen generation molecular sieves are stacked and filled, resulting in the mutual extrusion and fixed positions of the oxygen generation molecular sieves, the extruded parts between the oxygen generation molecular sieves cannot contact the compressed air. In this embodiment, the oxygen generation grid 2 moves relative to the main fork pipe 172 and the branch pipe 173, enabling the oxygen generation molecular sieves to move slightly, changing the contact surfaces between the oxygen generation molecular sieves, thereby changing the contact parts between the compressed air and the oxygen generation molecular sieves, which is beneficial to increasing the uniformity of nitrogen adsorption by the oxygen generation molecular sieves themselves, avoiding the inability to adsorb nitrogen due to the extrusion contact of some positions with other oxygen generation molecular sieves. Moreover, since the oxygen generation molecular sieves can adsorb nitrogen everywhere, the total amount of nitrogen that can be adsorbed by themselves is further increased, and correspondingly, the service time is extended; in addition, after the main fork pipe 172 and the branch pipe 173 are both elastic pipes, they are in elastic contact with the oxygen generation molecular sieves, avoiding the pulverization of the surface of the oxygen generation molecular sieves and the generation of debris after rigid contact, which affects the quality of the compressed air passing through the oxygen generation outlet 211. The main fork pipe 172 and the branch pipe 173 are both rubber pipes, which can avoid the pulverization and wear of the oxygen generation molecular sieves and ensure the safe and stable operation of the device.

[0090] In this embodiment, the main fork tube 172 extends along the vertical direction, its top is in one-to-one correspondence and communication with the oxygen production inlet 171 and is fixed below the oxygen production inlet pipe 17. The branch tubes 173 are evenly distributed at equal intervals along the axial direction of the main fork tube 172. The axial direction of the branch tubes 173 is perpendicular to the axial direction of the main fork tube 172. The diversion holes 174 are densely arranged on the main fork tube 172 and the branch tubes 173. In this way, the compressed air discharged from the oxygen production inlet pipe 17 can enter different positions in the storage cavity through the diversion holes 174 on the main fork tube 172 and the branch tubes 173, increasing the contact quantity with the oxygen production molecular sieve in the storage cavity, thereby increasing the contact adsorption area of the oxygen production molecular sieve, improving the uniformity of nitrogen adsorption by the oxygen production molecular sieve at various places in the storage cavity, and reducing the difference. Moreover, during the regeneration process of the oxygen production molecular sieve, it can also adsorb the nitrogen adsorbed by the oxygen production molecular sieves at various places, ensuring the uniformity of nitrogen adsorption for oxygen production and nitrogen release for regeneration by each oxygen production molecular sieve, improving the oxygen production concentration, and improving the regeneration effect of the oxygen production molecular sieve.

[0091] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A high-purity oxygen production adsorption tower, characterized in that, Comprising: A tower body (1), the tower body (1) being of a hollow structure, an air inlet (121) and an air outlet (111) being respectively arranged at the top and bottom of the tower body (1), an air inlet valve (122) and an air outlet valve (112) being respectively connected to the air inlet (121) and the air outlet (111), a partition plate (16) distributed vertically being fixed inside the tower body (1), the partition plate (16) and the tower body (1) enclosing to form an air inlet chamber and a plurality of oxygen generation chambers distributed vertically below the air inlet chamber, the air inlet (121) being communicated with the air inlet chamber, the air outlet (111) being communicated with the oxygen generation chamber at the bottom, a horizontal oxygen generation inlet pipe (17) being fixed inside the oxygen generation chamber, an oxygen generation inlet (171) being arranged on the side wall of the oxygen generation inlet pipe (17), and the aperture of the oxygen generation inlet (171) being smaller than the outer diameter of the oxygen generation molecular sieve; An oxygen generation wire mesh frame (2), the oxygen generation wire mesh frame (2) being coaxially sleeved outside the oxygen generation inlet pipe (17) and located inside the air inlet chamber, oxygen generation outlets (211) with apertures smaller than the outer diameter of the oxygen generation molecular sieve being densely arranged on the oxygen generation wire mesh frame (2), the oxygen generation wire mesh frame (2) rotating around its own center line on the oxygen generation inlet pipe (17), the oxygen generation wire mesh frame (2) dividing the oxygen generation chamber into a storage chamber and an oxygen-enriched chamber, the inner cavity of the oxygen generation inlet pipe (17), the oxygen generation inlet (171), the storage chamber, the oxygen generation outlet (211) and the oxygen-enriched chamber being sequentially communicated, and the storage chamber being used for storing the oxygen generation molecular sieve; A rotating assembly (3), the rotating assembly (3) driving each oxygen generation wire mesh frame (2) to rotate around the axis line of the oxygen generation inlet pipe (17); A communicating assembly (4) and a nitrogen extraction assembly (5), the communicating assembly (4) being used for communicating the air inlet chamber with the inner cavity of the oxygen generation inlet pipe (17) at the top and communicating the oxygen-enriched chamber at a higher position in adjacent oxygen generation chambers with the inner cavity of the corresponding oxygen generation inlet pipe (17), the nitrogen extraction assembly (5) including a negative pressure pump (51), and the input end of the negative pressure pump (51) being communicated with the oxygen-enriched chamber; Two opposite inner side walls of the tower body (1) are both provided with docking through holes (113) distributed vertically, the docking through holes (113) including a first through hole (1131), a second through hole (1132) and a third through hole (1133), the first through hole (1131) being communicated with the air inlet chamber, the second through hole (1132) being fixedly communicated with the end of the oxygen generation inlet pipe (17), and in adjacent two oxygen generation chambers, the third through hole (1133) being communicated between the oxygen-enriched chamber corresponding to the upper oxygen generation chamber and the second through hole (1132) corresponding to the lower oxygen generation chamber through the communicating assembly (4); One end of the oxygen production grid (2) is provided with two inlets and outlets (221). The central connection line of the two inlets and outlets (221) is perpendicular to the axis line of the oxygen production inlet pipe (17) and the intersection point is the midpoint of the central connection line. A sealing ring (18) is fixed on the side wall of the tower body (1) facing the two inlets and outlets (221). Two communication ports (181) distributed along the vertical direction are arranged on the sealing ring (18). A feeding pipe (115) and a discharging pipe (116) which are respectively located outside the tower body (1) and correspond to the two communication ports (181) one by one are fixedly arranged on the side wall of the tower body (1). The feeding pipe (115) and the discharging pipe (116) are respectively detachably and sealingly connected with a feeding plug (117) and a discharging plug (118). The moving path of the oxygen production grid (2) includes a replacement station. Under the replacement station, the feeding pipe (115) is communicated with one of the inlets and outlets (221) through the upper communication port (181), and the discharging pipe (116) is communicated with the other inlet and outlet (221) through the lower communication port (181).

2. The high-purity oxygen production adsorption tower according to claim 1, wherein: The communication assembly (4) includes a communication main pipe (41) extending along the vertical direction and communication branch pipes (42) arranged side by side along the vertical direction. The communication main pipe (41) is communicated with the communication branch pipes (42). One end of the communication branch pipe (42) far away from the communication main pipe (41) is communicated with the docking through hole (113) one by one. An oxygen production one-way valve (421) is arranged in the communication branch pipe (42) corresponding to the second through hole (1132). An intake one-way valve (411) and a sealing block (412) which are distributed at intervals along the vertical direction are further arranged in the communication main pipe (41). Each intake one-way valve (411) is arranged between two adjacent communication branch pipes (42), and each sealing block (412) is arranged between two adjacent communication branch pipes (42). Except for the ends, each communication branch pipe (42) is located between the adjacent oxygen production one-way valve (421) and the sealing block (412).

3. The high-purity oxygen production adsorption tower according to claim 2, characterized in that: The nitrogen extraction assembly (5) includes a nitrogen extraction main pipe (52) extending along the vertical direction and nitrogen extraction branch pipes (53) arranged in sequence along the vertical direction. The nitrogen extraction main pipe (52) is communicated with the input end of the negative pressure pump (51). Each nitrogen extraction branch pipe (53) is communicated between the communication branch pipe (42) corresponding to the second through hole (1132) and the nitrogen extraction main pipe (52) one by one. The nitrogen extraction branch pipe (53) is connected with a nitrogen extraction valve (531). The nitrogen extraction branch pipe (53) is located on the side of the oxygen production one-way valve (421) far away from the second through hole (1132).

4. The high-purity oxygen production adsorption tower according to claim 1, wherein: A purging through hole (114) corresponding to the oxygen-rich cavity is further arranged on the tower body (1). The purging through hole (114) is connected with a purging valve (63) and is used for introducing an inert gas.

5. The high-purity oxygen production adsorption tower according to claim 1, characterized in that: The rotating assembly (3) comprises a driven gear ring (31) coaxially sleeved outside the oxygen production inlet pipe (17) and fixedly connected to the oxygen production grid (2), a transmission gear (32) rotating around its own axis in the oxygen enrichment chamber and meshing with the driven gear ring (31), a driving gear (33) meshing with one of the driving gears (32) and located in the oxygen enrichment chamber, a rotating unit (34) driving the driving gear (33) to rotate, and a transmission unit (35) arranged between two adjacent transmission gears (32), wherein the two adjacent transmission gears (32) are transmission-connected via the transmission unit (35).

6. The high-purity oxygen production adsorption tower according to claim 5, characterized in that: The transmission unit (35) comprises two transmission wheels (351) coaxially fixedly connected to two adjacent transmission gears (32) and located outside the oxygen production chamber, and a transmission connecting rod (352) hinged between the two transmission wheels (351). The rotating assembly (3) further comprises a sealing cover (36), wherein the sealing cover (36) and the tower body (1) are enclosed to form a sealed chamber, wherein the transmission connecting rod (352) and the transmission wheel (351) are both located in the sealed chamber, and the transmission wheel (351) and the transmission gear (32) are fixedly connected via a transmission coaxial shaft (321), wherein the transmission coaxial shaft (321) seals and penetrates the side wall of the tower body (1).

7. The high-purity oxygen production adsorption tower according to claim 6, characterized in that: A visual window (361) is provided on a side wall of the sealing cover (36) facing the transmission wheel (351), and a replacement mark (362) is provided on the visual window (361). A hinge shaft (353) is provided on a side of the transmission wheel (351) adjacent to the visual window (361), and an end of the transmission connecting rod (352) is hinged to the hinge shaft (353). At the replacement station, the hinge shaft (353) on at least one of the transmission wheels (351) faces the replacement mark (362).

8. The high-purity oxygen production adsorption tower according to any one of claims 1-6, characterized in that: The oxygen production inlet (171) is densely distributed at the bottom of the oxygen production inlet pipe (17); the oxygen production inlet (171) is fixedly connected to a downward main fork pipe (172); the main fork pipe (172) is fixedly connected to a branch pipe (173) distributed along the axial direction of the main fork pipe (172); the main fork pipe (172) and the branch pipe (173) are both provided with a diversion hole (174); the inner diameter of the diversion hole (174) is smaller than the outer diameter of the oxygen production molecular sieve.

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