A single-tower VPSA skid-mounted oxygen generator using a magnetic levitation fan and fan pump

Abstract

The present invention relates to the field of oxygen production technology, and in particular to a single-tower VPSA skid-mounted oxygen production device using a magnetic levitation fan and a fan pump. The device comprises a first module and a second module. The first module comprises the magnetic levitation fan, an air cooler, an adsorption tower, an oxygen buffer tank 1 and a magnetic levitation fan pump. The second module comprises an oxygen compressor, an oxygen buffer tank 2 and an instrument gas buffer tank. The present invention provides four storage cylinders for storing molecular sieves in the adsorption tower. Through the arrangement of structures such as a locking mechanism, an upper electric telescopic cylinder and a lower electric telescopic cylinder, each storage cylinder can be automatically removed and the molecular sieve poured out, thereby realizing automatic removal of the molecular sieve of the device, and then pouring in a new molecular sieve. The device is then controlled to seal and install the storage cylinder back, thereby realizing automatic replacement of the molecular sieve. There is no need for maintenance personnel to use tools to dismantle multiple bolts and replace them using tools, thereby greatly improving the maintenance efficiency of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen production, and in particular to a single-tower VPSA skid-mounted oxygen production device using a magnetic suspension fan and a fan pump. Background Art

[0002] The structure of the vacuum analysis oxygen generator usually adopts a two-tower, three-tower or multi-tower structure. The power equipment adopts Roots blower for pressurization and magnetic levitation blower pump for analysis and regeneration. They are two independently set devices. When working, during the two-tower process, the Roots blower delivers air to adsorption tower A. The adsorption tower is filled with molecular sieves. The molecular sieve adsorbs nitrogen in the compressed air, and the unabsorbed oxygen flows out of adsorption tower A to produce oxygen. The magnetic levitation blower pump draws air from adsorption tower B, so that the gas in molecular sieve adsorption tower B is extracted, and a certain vacuum degree is reached in the tower body. Nitrogen is analyzed out of the molecular sieve and discharged into the atmosphere, so that the molecular sieve is regenerated. The molecular sieve in the adsorption tower repeatedly adsorbs and produces oxygen. The oxygen generator works back and forth and will continuously produce oxygen.

[0003] In the field of vacuum pressure swing adsorption (VPSA) oxygen production, traditional skid-mounted oxygen production equipment generally has the problem of inconvenient molecular sieve replacement. When replacing the molecular sieve, the operator needs to manually use professional tools to open the adsorption tower. This process is not only cumbersome but also consumes a lot of time and manpower.

[0004] First, the operator needs to disassemble the adsorption tower, which involves loosening and unscrewing many bolts, as well as careful handling of the tower sealing structure. Only after opening the tower can the internal molecular sieve be accessed and replaced. Due to the relatively small internal space of the adsorption tower, the operator's operational flexibility is limited when replacing the molecular sieve, which not only increases the difficulty of replacement, but may also cause accidental damage to the internal structure of the adsorption tower during the replacement process. At the same time, frequent disassembly and installation may cause the tower sealing performance to deteriorate, affecting the normal operation of the equipment. In addition, the intervention of manual operation increases safety risks, especially when dealing with high-pressure gas environments. Any operational errors may lead to serious consequences.

[0005] Therefore, a single-tower VPSA skid-mounted oxygen production device using a magnetic levitation fan and a fan pump is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and propose a single-tower VPSA skid-mounted oxygen production device using a magnetic suspension fan and a fan pump.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a single-tower VPSA skid-mounted oxygen production device using a magnetic suspension fan and a fan pump, comprising a first module and a second module;

[0008] The first module includes a magnetic levitation fan, an air cooler, an adsorption tower, an oxygen buffer tank and a magnetic levitation fan pump;

[0009] The second module includes an oxygen compressor, a second oxygen buffer tank and an instrument gas buffer tank;

[0010] A rotating seat fixed to the bottom surface is provided under the adsorption tower, and the bottom end of the adsorption tower is rotatably connected to the rotating seat. A fixed frame is provided next to the adsorption tower, and the fixed frame is fixedly connected to the oxygen buffer tank with a tower top via a bracket. A pair of fixed plates are fixedly connected to the inside of the adsorption tower, and four fixed frames are fixedly connected between the fixed plates. Storage cylinders for storing molecular sieves are provided in the four fixed frames, and lower partition screens are fixedly connected to the bottom ends of the inner sides of the storage cylinders. Mounting grooves are provided on the outer walls of the adsorption tower relative to the positions next to the fixed frames, and arc-shaped baffles are fixedly connected to the side walls of the storage cylinders. Mounting blocks are fixedly connected to the outer walls of the adsorption tower relative to the upper and lower sides of the arc-shaped baffles, and a locking mechanism for locking the storage cylinders is provided on the mounting blocks.

[0011] In the above technical solution, further, the magnetic levitation fan is connected to the air cooler through a pipeline, the outlet of the air cooler is connected to the inlet of the adsorption tower through a pipeline, and a pneumatic valve is provided on the pipeline for controlling the air intake of the adsorption tower;

[0012] The magnetic levitation fan pump is connected to the adsorption tower through a pipeline to provide a vacuum environment for the adsorption tower to promote the adsorption and desorption process of oxygen. The outlet of the adsorption tower is connected to the inlet of the oxygen buffer tank through a pipeline, and a valve is provided on the pipeline to control the oxygen production and return of the adsorption tower.

[0013] In the above technical solution, further, the oxygen buffer tank 2 is connected to the oxygen compressor through a pipeline, and the pipeline is provided with an oxygen outlet valve and a vent valve. The outlet of the oxygen compressor is connected to the oxygen buffer tank 1 through a pipeline, and the pipeline is provided with a valve. The outlet pipeline of the oxygen buffer tank 2 is used to connect to the gas consumption point, and the instrument gas buffer tank is connected to the oxygen buffer tank 2 through a pipeline to provide a stable instrument gas source for the system.

[0014] In the above technical solution, further, the locking mechanism includes a locking frame, the locking frame is provided with four pairs, each pair of locking frames is fixedly connected to the upper and lower sides of the arc baffle, the side wall of the mounting block is provided with a U-shaped groove, the locking frame is inserted into the inner side of the U-shaped groove, and the two sides of the inner side of the U-shaped groove are longitudinally slidably connected with locking blocks, and the locking blocks are equidistantly fixedly connected to a plurality of right-angle blocks with inclined surfaces on the side close to the locking block, and the two ends of the inner side of the locking frame are slidably connected to locking plates, and the locking plates are inclined on the side away from the locking plate, and three upper springs are fixedly connected between the side walls of the locking plate and the inner side of the locking frame, and a lower spring is fixedly connected between the top end of the U-shaped groove and the top end of the locking block, and the side walls of the locking block are fixedly connected to round rods.

[0015] In the above technical solution, further, a pair of upper electric telescopic cylinders are fixedly connected to the side walls of the fixed frame, the output ends of the upper electric telescopic cylinders are fixedly connected to the sliding frame through the side walls of the fixed frame, a rotating motor is fixedly connected to the inside of the sliding frame, the side walls of the sliding frame are rotatably connected to a rotating plate, the output ends of the rotating motor are fixedly connected to the side walls of the rotating plate through the side walls of the sliding frame, the side walls of the rotating plate are fixedly connected to an electromagnet, the arc-shaped baffle is made of iron, the upper and lower ends of the side walls of the rotating plate are fixedly connected to the lower electric telescopic cylinders, and the output ends of the lower electric telescopic cylinders are fixedly connected to U-shaped plates.

[0016] In the above technical solution, further, the fixed plates are all fixedly connected with rotary joints, the side close to the rotary joints is fixedly connected with connecting pipes, the top of the connecting pipes located at the bottom is fixedly connected with four L-shaped pipes, and the four L-shaped pipe side walls are all arranged through the inner side of the fixed frame, the side walls of the L-shaped pipes are all fixedly connected with conical sealing rings, the outer wall of the storage cylinder is provided with a socket relative to the position next to the conical sealing ring, the top end of the fixed frame is longitudinally slidably connected with a top cylinder, and a bellows is fixedly connected between the side wall of the connecting pipe located above and the outer wall of the top cylinder, the inner side of the bellows is fixedly connected with an upper partition screen, the side wall of the top cylinder is fixedly connected with a straight rod, the side wall of the mounting block is provided with a straight groove relative to the position next to the straight rod, and the rotary joint is respectively connected to the inlet and outlet of the adsorption tower through pipes.

[0017] In the above technical solution, further, the side wall of the top tube is fixedly connected with a horizontal plate, the bottom end of the straight rod is fixedly connected with a semicircular block, and a return spring is fixedly connected between the top end of the fixed frame and the top end of the top tube.

[0018] In the above technical solution, further, a groove is provided at the top of the locking frame, both sides of the groove are inclined, the side walls of the locking block are fixedly connected to the back plate, and the side walls of the U-shaped groove are provided with a through groove relative to the upper position of the back plate.

[0019] In the above technical solution, further, the adsorption tower is sealed and rotatably connected to the bottom end of the tower top, the top inner end of the tower top is fixedly connected to a drive motor, the top of the fixed plate located above is fixedly connected to a gear ring, and the output end of the drive motor is fixedly connected to a gear meshing with the gear ring.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention sets four storage cylinders for storing molecular sieves in the adsorption tower, and through the arrangement of a locking mechanism, an upper electric telescopic cylinder, a lower electric telescopic cylinder and other structures, each storage cylinder can be automatically taken out and the molecular sieve poured out, thereby realizing the automatic removal of the molecular sieve of the device, and then pouring in a new molecular sieve, and then controlling the equipment to seal and install the storage cylinder back, thereby realizing the automatic replacement of the molecular sieve, without the need for maintenance personnel to use tools to remove multiple bolts and use tools for replacement, thereby greatly improving the maintenance efficiency of the device.

[0022] 2. The entire device of the present invention adopts a skid-mounted design, integrating the first module and the second module in a standard container, which is easy to transport and install. It is particularly suitable for small and medium-sized oxygen production scenarios. At the same time, it adopts a magnetic levitation fan and a magnetic levitation fan pump without gear transmission, which improves the efficiency of the device and reduces noise.

[0023] 3. The present invention can automatically rotate the storage cylinder next to the fixed frame by setting up structures such as a rotating motor, gears and gear rings, so that multiple storage cylinders can be automatically disassembled and assembled, and molecular sieves can be replaced, greatly improving the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a rear perspective structural diagram of the oxygen production device of the present invention;

[0025] Figure 2 This is a schematic diagram of the front three-dimensional structure of the oxygen production device of the present invention;

[0026] Figure 3 This is a schematic diagram of the overall appearance of the adsorption tower and the fixing frame of the present invention;

[0027] Figure 4 The appended Figure 3 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 5 This is a schematic diagram of the overall appearance of the fixing frame of the present invention;

[0029] Figure 6 This is a schematic diagram of the front full-section three-dimensional structure of the adsorption tower of the present invention;

[0030] Figure 7 The appended Figure 6A schematic diagram of the partially enlarged structure at point B in the middle;

[0031] Figure 8 This is a bottom-up perspective structural diagram of the fixed frame, gear ring, and arc-shaped baffle separated from each other according to the present invention;

[0032] Figure 9 This is a schematic diagram of the top cylinder, locking frame, locking block and locking plate of the present invention when viewed from above;

[0033] Figure 10 This is a schematic diagram of the overall appearance structure of the mounting block of the present invention.

[0034] Figure: 1. First module; 2. Second module; 3. Rotating seat; 4. Fixed frame; 5. Tower top; 6. Fixed plate; 7. Fixed frame; 8. Storage cylinder; 9. Lower screen; 10. Curved baffle; 11. Magnetic levitation fan; 12. Air cooler; 13. Adsorption tower; 14. Oxygen buffer tank 1; 15. Magnetic levitation fan pump; 16. Mounting block; 17. Locking frame; 18. Locking block; 19. Right-angle block; 20. Locking plate; 21. Oxygen compressor; 22. Oxygen buffer tank 2; 23. Instrument air buffer tank; 24. Upper spring Spring; 25. Lower spring; 26. Upper electric telescopic cylinder; 27. Sliding frame; 28. Rotating motor; 29. ​​Rotating plate; 30. Electromagnet; 31. Lower electric telescopic cylinder; 32. U-shaped plate; 33. Round rod; 34. Rotary joint; 35. Connecting pipe; 36. L-shaped pipe; 37. Conical sealing ring; 38. Bellows; 39. Top cylinder; 40. Upper partition screen; 41. Straight rod; 42. Horizontal plate; 43. Semicircular block; 44. Return spring; 45. Groove; 46. Rear plate; 47. Drive motor; 48. Gear ring; 49. Gear. DETAILED DESCRIPTION

[0035] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] In actual use, it was found that the existing VPSA technology for 500-1000Nm³ oxygen production equipment mostly uses Roots blowers, Roots blower pumps + dual-tower oxygen production process. The installation method is on-site installation, which is relatively troublesome. In addition, the use of Roots blowers and blower pumps has low energy efficiency, high energy consumption, and high noise. The noise of large equipment is over 120dB, and the maintenance cost is high (there are many wearing parts and reliance on lubricating oil). To solve the above problems, the following structure is specially invented.

[0038] like Figures 1-10 The single-tower VPSA skid-mounted oxygen production device using a magnetic levitation fan and a fan pump shown includes a first module 1 and a second module 2;

[0039] The first module 1 includes a magnetic levitation fan 11, an air cooler 12, an adsorption tower 13, an oxygen buffer tank 14 and a magnetic levitation fan pump 15;

[0040] The magnetic levitation fan 11 is connected to the air cooler 12 via a pipe. The outlet of the air cooler 12 is connected to the inlet of the adsorption tower 13 via a pipe. A pneumatic valve is provided on the pipe to control the air intake of the adsorption tower 13.

[0041] The magnetic levitation fan pump 15 is connected to the adsorption tower 13 through a pipeline to provide a vacuum environment for the adsorption tower 13 and promote the adsorption and desorption process of oxygen. The outlet of the adsorption tower 13 is connected to the inlet of the oxygen buffer tank 14 through a pipeline, and a valve is provided on the pipeline to control the oxygen production and return of the adsorption tower 13.

[0042] The second module 2 includes an oxygen compressor 21, an oxygen buffer tank 22 and an instrument gas buffer tank 23;

[0043] The oxygen buffer tank 22 is connected to the oxygen compressor 21 through a pipeline, and an oxygen outlet valve and a vent valve are provided on the pipeline. The outlet of the oxygen compressor 21 is connected to the oxygen buffer tank 14 through a pipeline, and a valve is provided on the pipeline. The outlet pipeline of the oxygen buffer tank 22 is used to connect to the gas consumption point. The instrument gas buffer tank 23 is connected to the oxygen buffer tank 22 through a pipeline to provide a stable instrument gas source for the system.

[0044] When the equipment is running, the magnetic levitation fan 11 draws air into the system. The air is cooled by the air cooler 12 to reduce the air temperature and improve the subsequent adsorption efficiency. The cooled air is pressurized by the magnetic levitation fan pump 15 and sent to the adsorption tower 13. In the adsorption tower 13, the adsorption effect of the molecular sieve is used to adsorb impurities such as nitrogen in the air, thereby separating high-purity oxygen. The separated oxygen first enters the oxygen buffer tank 14 for buffer storage. The oxygen in the oxygen buffer tank 14 is then pressurized by the oxygen compressor 21 to meet the pressure requirements for subsequent transportation and use.

[0045] The pressurized oxygen enters the oxygen buffer tank 22 for secondary buffer storage to ensure the stability and continuity of the oxygen supply. At the same time, the instrument gas buffer tank 23 obtains oxygen from the oxygen buffer tank 22 as the instrument gas source, providing a stable gas source for the instruments and control equipment in the entire system, ensuring the normal operation of the system's automatic control function. The oxygen in the oxygen buffer tank 22 is transported to the gas use point through the outlet pipeline to meet production or other gas needs.

[0046] In summary, through the design of the above structure, the entire device is skid-mounted, and the first module 1 and the second module 2 are integrated in a standard container, which is convenient for transportation and installation. It is particularly suitable for small and medium-sized oxygen production scenarios and can effectively reduce the initial investment cost and operation and maintenance cost of the equipment. At the same time, the magnetic levitation fan 11 and the magnetic levitation fan pump are adopted, without gear transmission, the efficiency is improved by 20%-30%, the noise during operation is about 80dB, intelligent speed regulation, oil-free lubrication, and maintenance cost.

[0047] In actual use, it was found that traditional skid-mounted oxygen generators generally have the problem of inconvenient molecular sieve replacement. When replacing the molecular sieve, the operator needs to manually use professional tools to open the adsorption tower 13. This process is not only cumbersome, but also consumes a lot of time and manpower. In order to solve the above problem, the following structure is specially invented.

[0048] A rotating seat 3 fixed to the bottom surface is provided below the adsorption tower 13, and the bottom end of the adsorption tower 13 is rotatably connected to the rotating seat 3. A fixing frame 4 is provided next to the adsorption tower 13, and a tower top 5 is fixedly connected to the fixing frame 4 and the oxygen buffer tank 14 through a bracket. A pair of fixing plates 6 are fixedly connected to the inside of the adsorption tower 13, and four fixing frames 7 are fixedly connected between the fixing plates 6. A storage cylinder 8 for storing molecular sieves is provided in each of the four fixing frames 7, and a lower partition screen 9 is fixedly connected to the inner bottom end of the storage cylinder 8. The setting of the lower partition screen 9 ensures the passage of gas in the adsorption tower 13, supports the molecular sieve, and prevents the molecular sieve from falling. The outer wall of the adsorption tower 13 is provided with a mounting groove relative to the position next to the fixing frame 7, and the side wall of the storage cylinder 8 is fixedly connected with an arc baffle 10. The outer wall of the adsorption tower 13 is fixedly connected with a mounting block 16 on both sides of the upper and lower sides relative to the arc baffle 10. The mounting block 16 is provided with a locking mechanism for locking the storage cylinder 8;

[0049] The locking mechanism includes a locking frame 17, which is provided with four pairs. Each pair of locking frames 17 is fixedly connected to the upper and lower sides of the arc-shaped baffle 10. A U-shaped groove is provided on the side wall of the mounting block 16. The locking frame 17 is inserted into the inner side of the U-shaped groove. Locking blocks 18 are longitudinally slidably connected to both sides of the inner side of the U-shaped groove. Several right-angle blocks 19 with inclined surfaces are equidistantly fixed on the side close to the locking block 18. Locking plates 20 are slidably connected to both ends of the inner side of the locking frame 17. The locking plates 20 are tilted on the side away from each other. Three upper springs 24 are fixedly connected between the side walls of the locking plate 20 and the inner side of the locking frame 17. A lower spring 25 is fixedly connected between the top of the U-shaped groove and the top of the locking block 18. The side walls of the locking block 18 are fixedly connected with round rods 33.

[0050] A pair of upper electric telescopic cylinders 26 are fixedly connected to the side walls of the fixed frame 4. The output ends of the upper electric telescopic cylinders 26 pass through the side walls of the fixed frame 4 and are fixedly connected to the sliding frame 27. A rotating motor 28 is fixedly connected to the inside of the sliding frame 27. The side walls of the sliding frame 27 are rotatably connected to a rotating plate 29. The output end of the rotating motor 28 passes through the side walls of the sliding frame 27 and is fixedly connected to the side walls of the rotating plate 29. The side walls of the rotating plate 29 are fixedly connected to an electromagnet 30. The arc-shaped baffle 10 is made of iron. The upper and lower ends of the side walls of the rotating plate 29 are fixedly connected to lower electric telescopic cylinders 31. The output ends of the lower electric telescopic cylinders 31 are fixedly connected to U-shaped plates 32.

[0051] The fixing plate 6 is fixedly connected with a rotary joint 34, and a connecting pipe 35 is fixedly connected to the side close to the rotary joint 34. The top of the connecting pipe 35 located below is fixedly connected to four L-shaped tubes 36, and the side walls of the four L-shaped tubes 36 are all set through the inner side of the fixing frame 7. The side walls of the L-shaped tubes 36 are fixedly connected with a conical sealing ring 37. The outer wall of the storage cylinder 8 is provided with a socket relative to the position next to the conical sealing ring 37. The top of the fixing frame 7 is longitudinally slidably connected to the top cylinder 39. When it needs to be explained here, a rubber ring needs to be provided at the bottom of the top cylinder 39 to ensure that the top cylinder 39 is clamped with the storage cylinder 8. In order to improve the sealing performance, a bellows 38 is fixedly connected between the side wall of the connecting pipe 35 located above and the outer wall of the top cylinder 39. The bellows 38 avoids obstruction of the movement of the top cylinder 39 and ensures the communication between the top cylinder 39 and the connecting pipe 35. An upper partition screen 40 is fixedly connected to the inner side of the bellows 38. A straight rod 41 is fixedly connected to the side wall of the top cylinder 39. A straight groove is provided on the side wall of the mounting block 16 relative to the position next to the straight rod 41. The rotary joint 34 is connected to the inlet and outlet of the adsorption tower 13 respectively through a pipe, and the pipe is not connected to the adsorption tower 13, and thus will not be affected by the rotation of the adsorption tower 13.

[0052] When the oxygen production device is in operation, the oxygen is pressurized by the magnetic levitation blower pump 15 and sent to the inlet of the adsorption tower 13. It then enters the pipeline below, passes through the rotary joint 34 and enters the connecting pipe 35, and then is discharged into the storage cylinder 8 through the L-shaped pipe 36. After being adsorbed by the molecular sieve, it passes through the top cylinder 39 and the bellows 38 and enters the connecting pipe 35 above. Finally, it is discharged from the outlet of the adsorption tower 13 through the upper rotary joint 34 and the pipeline and enters the oxygen buffer tank 14 through the pipeline.

[0053] A horizontal plate 42 is fixedly connected to the side wall of the top tube 39, a semicircular block 43 is fixedly connected to the bottom end of the straight rod 41, and a return spring 44 is fixedly connected between the top end of the fixed frame 7 and the top end of the top tube 39;

[0054] A groove 45 is formed at the top of the locking frame 17 , and both sides of the groove 45 are inclined. The side walls of the locking block 18 are fixedly connected to a back plate 46 , and a through groove is formed on the side walls of the U-shaped groove relative to the upper position of the back plate 46 .

[0055] When the molecular sieve fails and needs to be replaced, first ensure that the oxygen concentrator is completely stopped and the pressure in the system is completely released. The waste collection box is placed next to the fixed frame 4. Then the upper electric telescopic cylinder 26 is controlled to start and drive the sliding frame 27, the rotating motor 28, the rotating plate 29 and the electromagnet 30 to move to the side of the arc baffle 10, and at the same time drive the U-shaped plate 32 to move to the side close to the round rod 33. Then the electromagnet 30 is controlled to generate suction to adsorb the arc baffle 10, and then the lower electric telescopic cylinder 31 is controlled to start and drive the sliding frame 27, the rotating motor 28, the rotating plate 29 and the electromagnet 30 to move to the side close to the round rod 33. The movable U-shaped plate 32 moves away from the side, thereby driving the U-shaped plate 32 to push the round rod 33 to move away from the side, and at the same time driving the locking block 18 and the right-angle block 19 to move, thereby moving the right-angle block 19 away from the locking plate 20, and gradually compressing the lower spring 25, thereby releasing the position restriction of the locking frame 17, and then the upper electric telescopic cylinder 26 can be controlled to start driving the rotating plate 29 to reset, and at the same time, under the suction force of the electromagnet 30, the arc baffle 10 and the storage cylinder 8 are pulled out from the inside of the fixed frame 7;

[0056] During this process, the inclined surface of the groove 45 squeezes the semicircular block 43 to move upward, and at the same time drives the horizontal plate 42 and the top cylinder 39 to move upward, so that the top cylinder 39 is away from the storage cylinder 8, and compresses the return spring 44, and at the same time drives the bellows 38 to move (in this process, when the storage cylinder 8 is just moved away from under the top cylinder 39, it will rub against the rubber ring, which will not affect the normal extraction of the storage cylinder 8), and then the semicircular block 43 moves to the horizontal plate 42, and then when the horizontal plate 42 is removed from the semicircular block 43, the tension is released. The semicircular block 43 is squeezed, and the top cylinder 39 is pushed back to its original position under the elastic force of the reset spring 44. At this time, the storage cylinder 8 is completely pulled out from the fixed frame 7, and the U-shaped plate 32 is moved out from the round rod 33. The locking block 18 is pushed back to its original position under the elastic force of the lower spring 25. Then, the rotary motor 28 can be controlled to start the rotation of the rotary plate 29, the electromagnet 30 and the storage cylinder 8, thereby pouring the waste molecular sieve into the waste bin on the side. After the dumping is completed, the rotary motor 28 is controlled to reset and the new molecular sieve is poured in.

[0057] Finally, the upper electric telescopic cylinder 26 is controlled to extend, pushing the storage tube 8 into the fixed frame 7. During this process, the above operation will be repeated, but the difference is that when the locking frame 17 moves into the U-shaped groove, the inclined surface of the right-angle block 19 will squeeze the inclined surface of the locking plate 20, squeezing the locking plate 20 to slide into the locking frame 17 and compressing the upper spring 24. Subsequently, when the locking plate 20 moves away from the right-angle block 19, the squeezing of the locking plate 20 will be released, and then the locking plate 20 will be pushed back to its original position under the elastic force of the upper spring 24, so that the lock The tightening plate 20 is stuck next to the plane of the front right-angle block 19, which limits the movement of the locking plate 20. This process is repeated until the socket on the storage cylinder 8 is tightly inserted into the conical sealing ring 37, ensuring the sealed connection between the storage cylinder 8 and the L-shaped tube 36. At the same time, the semicircular block 43 is stuck on the inclined surface outside the groove 45, so that the top cylinder 39 is tightly attached to the top of the storage cylinder 8 under the elastic force of the return spring 44, thereby ensuring the sealed installation of the storage cylinder 8. Then the electromagnet 30 is turned off and the upper electric telescopic cylinder 26 is controlled to reset.

[0058] In summary, through the design of the above structure, by arranging four storage cylinders 8 for storing molecular sieves in the adsorption tower 13, and through the arrangement of the locking mechanism, the upper electric telescopic cylinder 26 and the lower electric telescopic cylinder 31 and other structures, each storage cylinder 8 can be automatically taken out separately and the molecular sieve can be poured out, thereby realizing the automatic removal of the molecular sieve of the device, and then pouring in a new molecular sieve, and then controlling the device to seal and install the storage cylinder 8 back, thereby realizing the automatic replacement of the molecular sieve, without the need for maintenance personnel to use tools to remove multiple bolts and use tools for replacement, thereby greatly improving the maintenance efficiency of the device;

[0059] Furthermore, through the design of four storage cylinders 8 for storing molecular sieves, when the molecular sieve in a cylinder fails, the molecular sieve in the storage cylinder 8 can be replaced individually without replacing all the molecular sieves in the entire adsorption tower 13, thereby reducing maintenance costs and time. At the same time, the number of cylinders can be increased or decreased or different types of molecular sieves can be replaced according to specific process requirements, so that the adsorption tower 13 can adapt to different production tasks and gas processing requirements.

[0060] Based on the above embodiment, it was found during use that if the positions of the adsorption tower 13 and the fixing frame 4 were fixed, all the storage cylinders 8 could not be automatically assembled and disassembled. To solve the above problem, the above structure was further improved.

[0061] The adsorption tower 13 is sealed and rotatably connected to the bottom end of the tower top 5. The top of the tower top 5 is fixedly connected to a drive motor 47. The top of the fixed plate 6 above is fixedly connected to a gear ring 48. The output end of the drive motor 47 is fixedly connected to a gear 49 meshing with the gear ring 48.

[0062] When it is necessary to replace other storage cylinders 8, the drive motor 47 can be controlled to start and drive the gear 49 to rotate, thereby driving the meshing gear ring 48 and the fixed plate 6 to rotate, and then driving the adsorption tower 13 to rotate on the tower top 5 and the rotating seat 3. At the same time, under the action of the rotating joint 34, it will not be restricted by the pipeline, so that the corresponding arc baffle 10 can be rotated to the side of the fixed frame 4 for disassembly and assembly.

[0063] In summary, through the design of the above structure, the position of the storage cylinder 8 next to the fixing frame 4 can be automatically rotated, so that multiple storage cylinders 8 can be automatically disassembled and assembled, and the molecular sieve can be replaced, which greatly improves the convenience of the device.

[0064] The basic principles, main features and advantages of the present invention are shown and described above.

[0065] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump, characterized by: comprising a first module (1) and a second module (2); The first module (1) comprises a magnetic levitation fan (11), an air cooler (12), an adsorption tower (13), an oxygen buffer tank (14) and a magnetic levitation fan pump (15); The second module (2) comprises an oxygen compressor (21), a second oxygen buffer tank (22) and an instrument gas buffer tank (23); A rotating seat (3) fixed to the bottom surface is provided below the adsorption tower (13), and the bottom end of the adsorption tower (13) is rotatably connected to the rotating seat (3). A fixing frame (4) is provided beside the adsorption tower (13), and a tower top (5) is fixedly connected between the fixing frame (4) and the oxygen buffer tank (14) via a bracket. A pair of fixing plates (6) are fixedly connected to the inside of the adsorption tower (13), and four fixing frames (7) are fixedly connected between the fixing plates (6). The four fixing frames (7) are all A storage cylinder (8) for storing molecular sieves is provided, the bottom end of the inner side of the storage cylinder (8) is fixedly connected to a lower baffle screen (9), the outer wall of the adsorption tower (13) is provided with a mounting groove relative to the position next to the fixed frame (7), the side wall of the storage cylinder (8) is fixedly connected to an arc-shaped baffle (10), and the outer wall of the adsorption tower (13) is fixedly connected to the upper and lower sides of the arc-shaped baffle (10), and a locking mechanism for locking the storage cylinder (8) is provided on the mounting block (16); The locking mechanism includes a locking frame (17), and the locking frame (17) is provided with four pairs. Each pair of the locking frames (17) is fixedly connected to the upper and lower sides of the arc baffle (10). The side wall of the mounting block (16) is provided with a U-shaped groove. The locking frame (17) is inserted into the inner side of the U-shaped groove. The inner sides of the U-shaped groove are longitudinally slidably connected with locking blocks (18). The locking blocks (18) are fixedly connected to the side with inclined surfaces at equal distances. The two ends of the inner side of the locking frame (17) are slidably connected with locking plates (20). The locking plates (20) are tilted on the side away from each other. Three upper springs (24) are fixedly connected between the side walls of the locking plates (20) and the inner side of the locking frame (17). A lower spring (25) is fixedly connected between the top of the U-shaped groove and the top of the locking block (18). The side walls of the locking block (18) are fixedly connected with round rods (33). A pair of upper electric telescopic cylinders (26) are fixedly connected to the side wall of the fixed frame (4); the output ends of the upper electric telescopic cylinders (26) pass through the side wall of the fixed frame (4) and are fixedly connected to the sliding frame (27); the inner side of the sliding frame (27) is fixedly connected to a rotating motor (28); the side wall of the sliding frame (27) is rotatably connected to a rotating plate (29); the output end of the rotating motor (28) passes through the side wall of the sliding frame (27) and is fixedly connected to the side wall of the rotating plate (29); the side wall of the rotating plate (29) is fixedly connected to an electromagnet (30); the arc-shaped baffle (10) is made of iron; the upper and lower ends of the side wall of the rotating plate (29) are fixedly connected to lower electric telescopic cylinders (31); and the output ends of the lower electric telescopic cylinders (31) are fixedly connected to U-shaped plates (32).

2. The single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump according to claim 1, characterized in that: The magnetic levitation fan (11) is connected to the air cooler (12) via a pipeline, the outlet of the air cooler (12) is connected to the inlet of the adsorption tower (13) via a pipeline, and a pneumatic valve is provided on the pipeline for controlling the air intake of the adsorption tower (13); The magnetic levitation blower pump (15) is connected to the adsorption tower (13) via a pipeline to provide a vacuum environment for the adsorption tower (13) to promote the adsorption and desorption process of oxygen. The outlet of the adsorption tower (13) is connected to the inlet of the oxygen buffer tank (14) via a pipeline, and a valve is provided on the pipeline to control the oxygen production and oxygen return of the adsorption tower (13).

3. The single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump according to claim 1, characterized in that: The oxygen buffer tank 2 (22) is connected to the oxygen compressor (21) through a pipeline, and an oxygen outlet valve and a vent valve are provided on the pipeline. The outlet of the oxygen compressor (21) is connected to the oxygen buffer tank 1 (14) through a pipeline, and a valve is provided on the pipeline. The outlet pipeline of the oxygen buffer tank 2 (22) is used to connect to the gas point. The instrument gas buffer tank (23) is connected to the oxygen buffer tank 2 (22) through a pipeline to provide a stable instrument gas source for the system.

4. The single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump according to claim 1, characterized in that: The fixed plate (6) is fixedly connected with a rotary joint (34), and the side of the rotary joint (34) is fixedly connected with a connecting pipe (35). The top of the connecting pipe (35) located below is fixedly connected with four L-shaped tubes (36), and the side walls of the four L-shaped tubes (36) are all set through the inner side of the fixed frame (7). The side walls of the L-shaped tubes (36) are fixedly connected with a conical sealing ring (37). The outer wall of the storage cylinder (8) is provided with a jack at a position next to the conical sealing ring (37). The top end of the fixed frame (7) is longitudinally slidably connected to a top cylinder (39), a bellows (38) is fixedly connected between the side wall of the connecting pipe (35) located above and the outer wall of the top cylinder (39), an upper partition screen (40) is fixedly connected to the inner side of the bellows (38), a straight rod (41) is fixedly connected to the side wall of the top cylinder (39), a straight groove is provided on the side wall of the mounting block (16) relative to the position next to the straight rod (41), and the rotary joint (34) is respectively connected to the inlet and outlet of the adsorption tower (13) through a pipeline.

5. The single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump according to claim 4, characterized in that: The side wall of the top cylinder (39) is fixedly connected to a horizontal plate (42), the bottom end of the straight rod (41) is fixedly connected to a semicircular block (43), and a return spring (44) is fixedly connected between the top end of the fixed frame (7) and the top end of the top cylinder (39).

6. The single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump according to claim 1, characterized in that: The top of the locking frame (17) is provided with a groove (45), both sides of the groove (45) are inclined, the side walls of the locking block (18) are fixedly connected to the back plate (46), and the side walls of the U-shaped groove are provided with a through groove at a position above the back plate (46).

7. The single-tower VPSA skid-mounted oxygen generator using a magnetic levitation blower and a blower pump according to claim 1, characterized in that: The adsorption tower (13) is sealed and rotatably connected to the bottom end of the tower top (5); the top end of the tower top (5) is fixedly connected to a driving motor (47); the top end of the fixed plate (6) located above is fixedly connected to a gear ring (48); and the output end of the driving motor (47) is fixedly connected to a gear (49) meshing with the gear ring (48).

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