Oxygen purification device

Abstract

The utility model discloses an oxygen purification device. The oxygen purification device comprises a base, wherein a carbon dioxide adsorption tower, a nitrogen adsorption tower and an oxygen compression tower are mounted on the base; a gas inlet pipe is arranged at the bottom end of the carbon dioxide adsorption tower, a gas pump is mounted on the gas inlet pipe, a first connecting pipe group communicated with the top of the nitrogen adsorption tower is mounted at the top of the carbon dioxide adsorption tower, and a filtering and drying assembly is connected to the first connecting pipe group; a second connecting pipe communicated with the oxygen compression tower is mounted at the bottom of the nitrogen adsorption tower. According to the carbon dioxide adsorption tower, the multiple material changing structures are arranged in the carbon dioxide adsorption tower, so that air is in contact with the multiple material changing structures, carbon dioxide in the air is sufficiently absorbed, the purity of oxygen is improved, the material changing structures are detachably mounted, solid adsorbents can be replaced, and the carbon dioxide adsorption tower is convenient to use. The adsorption effect of the solid adsorbent on carbon dioxide is ensured, so that the purity of oxygen is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen purification, in particular to an oxygen purification device. Background Art

[0002] Oxygen is very inactive at room temperature and is not easy to react with many substances, but it is very active at high temperatures and can directly combine with a variety of elements. This is related to the fact that the electronegativity of oxygen atoms is second only to fluorine, which makes oxygen widely used in industry. As we know, air is a good oxygen base and does not cost anything. Therefore, purifying oxygen from Kongqi can reduce costs.

[0003] However, although traditional purification equipment for extracting oxygen from air can remove water, nitrogen and carbon dioxide from the air to obtain oxygen with very few impurities, it generally only performs the purification process once, and there is a problem that other gases in the air are not fully absorbed by the reaction device, which will affect the purity of oxygen.

[0004] Therefore, how to make other gases in the air react with the reaction device and be fully absorbed to improve the purity of oxygen is a technical problem that needs to be solved now. Utility Model Content

[0005] The utility model aims to provide an oxygen purification device to solve the problem that other gases in the air are not sufficiently reacted and absorbed when purifying the air, thus affecting the purity of oxygen.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes an oxygen purification device, comprising a base; wherein a carbon dioxide adsorption tower, a nitrogen adsorption tower and an oxygen compression tower are installed on the base; an air inlet pipe is provided at the bottom end of the carbon dioxide adsorption tower, an air pump is installed on the air inlet pipe, a first connecting pipe group connected to the top of the nitrogen adsorption tower is installed at the top of the carbon dioxide adsorption tower, and a filtering and drying component is connected to the first connecting pipe group; a second connecting pipe connected to the oxygen compression tower is installed at the bottom of the nitrogen adsorption tower.

[0007] Optionally, the carbon dioxide adsorption tower includes a first tower body installed on a base, a partition plate group installed in the first tower body, a plurality of material changing structures detachably installed on the first tower body, and a solid adsorbent installed in the first tower body through the material changing structures.

[0008] Optionally, the number of the partition plates corresponds to the number of the material changing structures, and the partition plates are located above the material changing structures.

[0009] Optionally, a plurality of the partitioning intermediate plates are provided with a pressure-limiting structure; and the first tower body has a square shape.

[0010] Optionally, the pressure limiting structure includes a mounting groove arranged on the partition plate, a pressure limiting block installed in the mounting groove, a spring with one end in contact with the bottom surface of the pressure limiting block, and a sealing ring installed on the side wall of the pressure limiting block.

[0011] Optionally, the partition plate is also provided with a guide hole connected to the mounting groove, the bottom of the pressure limiting block is provided with a guide rod adapted to the guide hole, the spring is sleeved on the guide rod, and the other end of the spring is in contact with the bottom of the mounting groove; the groove wall of the mounting groove is also provided with an air passing groove; the partition intermediate plate is also provided with a connecting groove connected to the mounting groove.

[0012] Optionally, first main holes connected to the air passage groove are provided at equal intervals on the side wall of the partition plate; a sealing block is installed on the end of the first main hole away from the air passage groove; a first secondary hole connected to the first main hole is provided on the top of the partition plate; and the opening direction of the first main hole is perpendicular to the opening direction of the first secondary hole.

[0013] Optionally, second main holes are provided at equal angles on the side of the pressure limiting block, and second auxiliary holes connected to the second main holes are evenly distributed on the top surface of the pressure limiting block; the opening direction of the first main hole is perpendicular to the opening direction of the second auxiliary hole.

[0014] Optionally, the material changing structure includes a discharge frame movably mounted on the first tower body, a handrail plate mounted on one end of the discharge frame, a support block arranged on the side of the discharge frame, and a slide groove arranged on the first tower body corresponding to the support block.

[0015] Optionally, an electromagnet is installed on the outer wall of the first tower body, and an iron block corresponding to the electromagnet is installed on the handrail plate; and ventilation holes are evenly distributed on the bottom of the discharge frame.

[0016] Optionally, the first connecting pipe group includes a first connecting air inlet pipe whose two ends are respectively connected to the carbon dioxide adsorption tower and the filter drying component, and a first connecting air outlet pipe whose two ends are respectively connected to the filter drying component and the nitrogen adsorption tower.

[0017] Optionally, the filter-drying assembly includes a filter-drying tower installed on a base, clean water and desiccant installed in the filter-drying tower, and a partition plate installed in the filter-drying tower for separating the clean water and desiccant, and the filter-drying tower is connected to a first connecting air inlet pipe and a first connecting air outlet pipe.

[0018] Optionally, the partition plate divides the inner cavity of the filter-drying tower into a filter cavity and a drying cavity; the first connecting air inlet pipe is connected to the filter cavity, the cleaning water is located in the filter cavity, the desiccant is located in the drying cavity, the end of the first connecting air inlet pipe extends into the cleaning water, and an anti-reverse pipe is provided on the first connecting air inlet pipe. The anti-reverse pipe is used to connect the first connecting air inlet pipe and the filter cavity, and a one-way valve is provided on the anti-reverse pipe, and the pipe mouth of the anti-reverse pipe is higher than the liquid level of the cleaning water.

[0019] Optionally, the filter-drying tower is also equipped with a clean water inlet pipe, a clean water drain pipe, a desiccant feed pipe and a desiccant drain pipe; the clean water inlet pipe and the clean water drain pipe are both connected to the filter chamber; the desiccant drain pipe and the desiccant feed pipe are both connected to the drying chamber; and a ventilation groove is formed between the partition plate and the top surface of the inner cavity of the filter-drying tower.

[0020] Optionally, the nitrogen adsorption tower includes a nitrogen tower body installed on a base, a molecular sieve installed in the nitrogen tower body, and a funnel-shaped guide tube installed at the top of the inner cavity of the nitrogen tower body, wherein the guide tube is connected to the first connecting air outlet pipe; a mounting plate for fixing the molecular sieve is provided in the nitrogen tower body; and the bottom of the nitrogen tower body is connected to the oxygen compression tower through a second connecting pipe.

[0021] Optionally, the oxygen compression tower includes a compression tower body installed on a base, a compression cylinder installed on the top of the compression tower body cavity, a driving motor installed on the outer wall of the compression tower body, a crank connecting rod installed on the driving motor, a piston installed in the compression cylinder and connected to the crank connecting rod, a compression air inlet pipe installed on the compression cylinder, an air inlet check valve installed on the compression air inlet pipe, a compression air outlet pipe installed on the compression tower body and connected to the top of the compression cylinder cavity, and a pressure regulating valve and an air outlet check valve are installed on the compression air outlet pipe.

[0022] Compared with the prior art, the utility model provides an oxygen purification device, which has the following beneficial effects:

[0023] The oxygen purification device arranges a plurality of material exchange structures in a carbon dioxide adsorption tower so that air contacts the plurality of material exchange structures, thereby ensuring sufficient absorption of carbon dioxide in the air, thereby improving the purity of oxygen. Furthermore, by making the material exchange structures detachable, the solid adsorbent can be replaced, ensuring the adsorption effect of the solid adsorbent on carbon dioxide, thereby improving the purity of oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0025] Figure 2 It is a cross-sectional view of the first tower body, the material changing structure and the partition plate of the utility model.

[0026] Figure 3 It is an installation schematic diagram of the material changing structure of the utility model.

[0027] Figure 4 It is a schematic diagram of the material changing structure of the utility model.

[0028] Figure 5 It is a structural schematic diagram of the first tower body of the utility model.

[0029] Figure 6 It is a schematic diagram of the partition plate and the pressure limiting structure of the utility model.

[0030] Figure 7 It is a cross-sectional view of the partition plate and the pressure limiting structure of the utility model.

[0031] Figure 8 It is a schematic diagram of the filter drying component of the utility model.

[0032] Fig. 9 It is a cross-sectional view of the filter-drying component of the utility model.

[0033] Fig.10 It is a structural schematic diagram of a nitrogen adsorption tower of the utility model.

[0034] Fig.11 It is a structural schematic diagram of an oxygen compression tower of the utility model.

[0035] Fig.12 It is a structural schematic diagram of the compression cylinder of the utility model.

[0036] Markings in the figure: 1. Base; 2. Carbon dioxide adsorption tower; 21. Inlet pipe; 22. Air pump; 23. First tower body; 231. Electromagnet; 24. Partition plate; 241. First main hole; 242. Blocking block; 243. First auxiliary hole; 25. Material replacement structure; 251. Material discharge frame; 2511. Ventilation hole; 252. Handrail plate; 2521. Iron block; 253. Support block; 254. Slide; 26. Pressure limiting structure; 261. Installation groove; 262. Pressure limiting block; 2621. Second main hole; 2622. Second auxiliary hole; 263. Spring; 264. Sealing ring; 265. Guide hole; 266. Guide rod; 267. Connecting groove; 268. Gas groove; 3. Nitrogen adsorption tower; 31. Nitrogen tower body; 32. Molecular sieve; 33. Guide pipe; 3 4. Mounting plate; 4. Oxygen compression tower; 41. Compression tower body; 42. Compression cylinder; 421. Compression inlet pipe; 422. Inlet check valve; 423. Compression outlet pipe; 424. Pressure regulating valve; 425. Outlet check valve; 43. Drive motor; 44. Crank connecting rod; 45. Piston; 5. First connecting pipe group; 51. First connecting inlet pipe; 511. Anti-reverse pipe; 512. Check valve; 52. First connecting outlet pipe; 6. Filter-drying assembly; 61. Filter-drying tower; 611. Filter chamber; 612. Drying chamber; 613. Cleaning water inlet pipe; 614. Cleaning water discharge pipe; 615. Desiccant feed pipe; 616. Desiccant discharge pipe; 617. Ventilation groove; 62. Cleaning water; 63. Desiccant; 64. Partition plate; 7. Second connecting pipe. DETAILED DESCRIPTION

[0037] The following is a detailed description in conjunction with the accompanying drawings and specific implementations. In the following description, many specific details are set forth to facilitate a full understanding of the present utility. However, the present utility can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present utility, so the present utility is not limited by the specific embodiments disclosed below.

[0038] An oxygen purification device of the present application can be used in situations such as extracting oxygen from the air, and of course can also be used in other similar application scenarios. An oxygen purification device is described in detail below.

[0039] See attached Figure 1 — Fig.12As shown, a structural schematic diagram of a preferred embodiment of an oxygen purification device of the present application is shown. The oxygen purification device comprises a base 1; characterized in that a carbon dioxide adsorption tower 2, a nitrogen adsorption tower 3 and an oxygen compression tower 4 are installed on the base 1; an air inlet pipe 21 is provided at the bottom end of the carbon dioxide adsorption tower 2, and an air pump 22 is installed on the air inlet pipe 21; a first connecting pipe group 5 connected to the nitrogen adsorption tower 3 is installed on the top of the carbon dioxide adsorption tower 2, and a filter drying component 6 installed on the base 1 is connected to the first connecting pipe group 5; a second connecting pipe 7 connected to the oxygen compression tower 4 is installed at the bottom of the nitrogen adsorption tower 3.

[0040] The utility model can adsorb carbon dioxide in the air and improve the purity of oxygen by setting the carbon dioxide adsorption tower 2; can adsorb nitrogen in the air and improve the purity of oxygen by setting the nitrogen adsorption tower 3; can compress the purified oxygen by setting the oxygen compression tower 4, so as to facilitate the storage of oxygen; can accelerate the speed of air entering the carbon dioxide adsorption tower 2 by setting the air pump 22, and improve the purification efficiency of oxygen; can transport the gas purified by the carbon dioxide adsorption tower 2 by setting the first connecting pipe group 5; can filter and remove impurities such as dust and moisture from the gas after passing through the carbon dioxide adsorption tower 2 by setting the filtering and drying component 6, and the filtering of dust and impurities can prevent the subsequent nitrogen adsorption tower 3 from being affected, and the removal of moisture further improves the purity of oxygen; can transport the oxygen after passing through the nitrogen adsorption tower 3 to the oxygen compression tower 4 by setting the second connecting pipe 7, and compress the oxygen.

[0041] See attached Figure 1 and Figure 2 As shown, in the utility model, the carbon dioxide adsorption tower 2 includes a first tower body 23 installed on the base 1, a partition plate 24 installed in the first tower body 23, a plurality of material changing structures 25 detachably installed on the first tower body 23, and a solid adsorbent installed in the first tower body through the material changing structures 25.

[0042] The utility model can limit the gas in the first tower body 23 by setting the partition plate 24, ensure the full contact between the gas and the solid adsorbent, improve the effect of adsorbing carbon dioxide in the air, and thus improve the oxygen purity; by setting the material replacement structure 25, the solid adsorbent can be replaced to avoid the situation where the solid adsorbent cannot adsorb carbon dioxide after being saturated with adsorption, thereby ensuring the adsorption effect of carbon dioxide; by setting the solid adsorbent, carbon dioxide in the air can be adsorbed. It should be noted that the solid adsorbent can be activated carbon, carbon nanotubes, etc. Different solid adsorbents can be selected according to actual needs to adsorb different gases. Nitrogen is not absorbed here because the proportion of nitrogen in the air is too large.

[0043] See attached Figure 1 and Figure 2 As shown, in the present invention, the number of partition plates 24 corresponds to the number of material changing structures 25, and the partition plates 24 are located above the material changing structures 25; a plurality of partition plates 24 are provided with a pressure limiting structure 26; and the first tower body 23 is square in shape.

[0044] The utility model ensures that the air is in full contact with the solid adsorbent in each material exchange structure 25 by arranging the partition plate 24 and the material exchange structure 25 in one-to-one correspondence, and cooperates with the pressure limiting structure 26 provided on the partition plate 24, so as to ensure that the solid adsorbent can fully adsorb the carbon dioxide in the air, thereby improving the oxygen purity; the first tower body is arranged in a square shape to facilitate the replacement of the material exchange structure 25; the pressure limiting structure 26 is provided to limit the gas, so as to ensure that the gas pressure reaches a specified value before entering the next chamber and being adsorbed by the next material exchange structure 25.

[0045] See attached Figure 2 , Figure 6 and Figure 7 As shown, in the utility model, the pressure limiting structure 26 includes a mounting groove 261 arranged on the partition plate 24, a pressure limiting block 262 installed in the mounting groove 261, a spring 263 with one end in contact with the bottom surface of the pressure limiting block 262, and a sealing ring 264 installed on the side wall of the pressure limiting block 262; wherein, the partition plate 24 is also provided with a guide hole 265 connected with the mounting groove 261, the bottom of the pressure limiting block 262 is provided with a guide rod 266 adapted to the guide hole 265, the spring 263 is sleeved on the guide rod 266, and the other end of the spring 263 is in contact with the bottom of the mounting groove 261; the partition plate 24 is also provided with a connecting groove 267 connected with the mounting groove 261; the groove wall of the mounting groove 261 is also provided with an air passing groove 268.

[0046] The utility model provides an installation position for the pressure limiting block 262 by setting the installation groove 261; limits the gas by setting the pressure limiting block 262 to ensure that the gas is in full contact with the solid adsorbent; balances the gravity of the pressure limiting block 262 by setting the spring 263 and adjusts the required air pressure; blocks the gap between the pressure limiting block 262 and the installation groove 261 by setting the sealing ring 264 to ensure that the air pressure can rise and push the pressure limiting block 262 to rise; guide holes 265 and guide rods 266 are set to guide the rise and fall of the pressure limiting block 262 and provide an installation position for the spring 263; ensures that the air can contact the pressure limiting block 262 by setting the connecting groove 267, and ensures that the pressure limiting block 262 is pushed up after the air pressure rises; and enables the gas to pass through the pressure limiting block 262 into the next chamber after the pressure limiting block 262 rises, and to contact and adsorb the solid adsorbent in the next material replacement structure 25.

[0047] See attached Figure 6 and Figure 7 As shown, in the utility model, first main holes 241 connected to the air groove 268 are evenly spaced on the side wall of the partition plate 24, and a blocking block 242 is installed on the end of the first main hole 241 away from the air groove 268; a first auxiliary hole 243 connected to the first main hole 241 is provided on the top of the partition plate 24, and the opening direction of the first auxiliary hole 243 is perpendicular to the opening direction of the first main hole 241; second main holes 2621 are provided at equal angles on the side of the pressure limiting block 262, and second auxiliary holes 2622 connected to the second main holes 2621 are evenly distributed on the top surface of the pressure limiting block 262, and the opening direction of the second auxiliary hole 2622 is perpendicular to the opening direction of the second main hole 2621.

[0048] The utility model provides the first main hole 241, which is connected with the gas groove 268, so that the gas can enter the first main hole 241 from the gas groove 268; the blocking block 242 is provided to block the end of the first main hole 241 to prevent the gas from flowing out from the side of the partition plate 24 and affecting the welding connection between the partition plate 24 and the inner cavity of the first tower body 23; the first auxiliary hole 243 is provided, which is connected with the first main hole 241, so that the gas can be ejected from the first auxiliary hole 243, so that the gas can be evenly ejected from the partition plate 24 and contact with the next solid adsorbent installed on the material replacement structure 25, so that the solid adsorbent can be used. The use is more uniform, avoiding the situation that some solid adsorbents are completely adsorbed while some solid adsorbents are only partially adsorbed; the setting of the universal second main hole 2621, in conjunction with the second auxiliary hole 2622, allows the gas to be ejected from the second auxiliary hole 2622, further making the gas ejection more uniform and making the use of the solid adsorbent more uniform; the setting that the opening direction of the first main hole 241 is perpendicular to the opening direction of the first auxiliary hole 243, and the opening direction of the second main hole 2621 is perpendicular to the opening direction of the second auxiliary hole 2622, facilitates the processing of the auxiliary holes and ensures that the auxiliary holes can be connected with the main holes. It should be noted that the main holes are all through holes and the auxiliary holes are all blind holes.

[0049] See attached Figure 2 — Figure 5 As shown, in the utility model, the material replacement structure 25 includes a discharge frame 251 movably installed on the first tower body 23, a handrail plate 252 installed on one end of the discharge frame 251, a support block 253 arranged on the side of the discharge frame 251, and a slide groove 254 arranged on the first tower body 23 corresponding to the support block 253; an electromagnet 231 is installed on the outer wall of the first tower body 23, and an iron block 2521 corresponding to the electromagnet 231 is installed on the handrail plate 252; and ventilation holes 2511 are evenly distributed on the bottom of the discharge frame 251.

[0050] The utility model provides an installation position for the solid adsorbent by setting the discharge frame 251, that is, the solid adsorbent is evenly placed in the discharge frame 251; the handrail board 252 is set to facilitate workers to take the solid adsorbent when replacing it, and to facilitate workers to separate the discharge frame 251 from the first tower body 23, thereby improving the efficiency of replacing the solid adsorbent and improving the oxygen purification efficiency; the support block 253 and the chute 254 are set to improve the support effect on the discharge frame 251, reduce the influence of the gravity of the discharge frame 251 and the gravity of the solid adsorbent on the connection between the discharge frame 251 and the handrail board 252, and extend the handrail board 252 and The service life of the discharge frame 251; through the setting of the electromagnet 231, in cooperation with the iron block 2521, the handrail plate 252 can be fixed, thereby ensuring that the material replacement structure 25 is firmly installed, and preventing the handrail plate 252 from being separated from the first tower body 23 at will. A sealing strip is also installed on the handrail plate 252, which seals the connection between the handrail plate 252 and the first tower body 23; through the setting of the vent hole 2511, it is ensured that the gas can pass through the discharge frame 251 and contact with the solid adsorbent. It should be noted that the size of the solid adsorbent is larger than the aperture of the vent hole 2511, and the solid adsorbent cannot pass through the vent hole 2511.

[0051] See attached Figure 1 and Figure 8 As shown, in the utility model, the first connecting pipe group 5 includes a first connecting air inlet pipe 51 whose two ends are respectively connected to the carbon dioxide adsorption tower 2 and the filter drying component 6 installed on the base 1, and a first connecting air outlet pipe 52 whose two ends are respectively connected to the filter drying component 6 and the nitrogen adsorption tower 3; the filter drying component 6 includes a filter drying tower 61 installed on the base 1, clean water 62 and desiccant 63 installed in the filter drying tower 61, and a partition plate 64 installed in the filter drying tower 61 for separating the clean water 62 and the desiccant 63, and the filter drying tower 61 is connected to the first connecting air inlet pipe 51 and the first connecting air outlet pipe 52.

[0052] The utility model can clean the gas by setting the cleaning water 62, clean the dust and impurities in the gas, ensure the cleanliness of the gas, and avoid affecting the molecular sieve 32 during the subsequent nitrogen filtration; by setting the desiccant 63, the gas passing through the cleaning water 62 can be dried to absorb the moisture in the gas; by setting the partition plate 64, the contact between the cleaning water 62 and the desiccant 63 can be avoided.

[0053] See attached Figure 8 and Fig. 9As shown, in the present invention, the partition plate 64 divides the inner cavity of the filter drying tower 61 into a filter cavity 611 and a drying cavity 612; the first connecting air inlet pipe 51 is connected to the filter cavity 611, the cleaning water 62 is located in the filter cavity 611, and the desiccant 63 is located in the drying cavity 612; the connection position between the drying cavity 612 and the first connecting air outlet pipe 52 is located at the bottom end of the drying cavity 612. The present invention ensures that the gas will be discharged only after passing through the desiccant 63 by setting the connection position between the first connecting air outlet pipe 52 and the drying cavity 612 at the bottom end of the drying cavity 612, thereby ensuring the dehydration effect on the gas. It should be particularly noted that a filter is installed at the pipe mouth of the first connecting air outlet pipe 52 to prevent the desiccant from entering the first connecting air outlet pipe 52.

[0054] See attached Figure 8 and Fig. 9 As shown, in the utility model, the end of the first connecting air inlet pipe 51 extends into the cleaning water 62, and the first connecting air inlet pipe 51 is provided with an anti-reverse pipe 511, and the anti-reverse pipe 511 is used to connect the first connecting air inlet pipe 51 and the filter chamber 611, and a one-way valve 512 is provided on the anti-reverse pipe 511, and the pipe mouth of the anti-reverse pipe 511 is higher than the liquid level of the cleaning water 62. The utility model extends the end of the first connected air inlet pipe 51 into the cleaning water 62 to ensure that the gas enters the cleaning water 62, so that the cleaning water 62 can clean the dust and impurities in the gas; the setting of the anti-reverse pipe 511 avoids the cleaning water 62 from generating a backflow in the first connected air inlet pipe 51, that is, when the air pressure in the first connected air inlet pipe 51 is too low, the gas in the filter chamber 611 will enter the first connected air inlet pipe 51 through the one-way valve 512. With the setting of the one-way valve 512, when the gas is introduced into the filter chamber 611 from the first connected air inlet pipe 51, it will not be sprayed out from the anti-reverse pipe 511, thereby ensuring that the cleaning water can clean the dust and impurities in the gas.

[0055] See attached Figure 8 and Fig. 9 As shown, in the utility model, a cleaning water inlet pipe 613, a cleaning water discharge pipe 614, a desiccant feed pipe 615 and a desiccant discharge pipe 616 are also installed on the filter drying tower 61; the cleaning water inlet pipe 613 and the cleaning water discharge pipe 614 are both connected to the filter chamber 611; a ventilation groove 617 is formed between the partition plate 64 and the top surface of the inner cavity of the filter drying tower 61. The utility model provides the ventilation groove 617 so that the gas cleaned by the cleaning water 62 can enter the drying chamber 612 and be separated from the desiccant 63 for drying; it should be particularly noted that valves are installed on the cleaning water inlet pipe 613, the cleaning water discharge pipe 614, the desiccant feed pipe 615 and the desiccant discharge pipe 616.

[0056] See attached Fig.10As shown, in the utility model, the nitrogen adsorption tower 3 includes a nitrogen tower body 31 installed on the base 1, a molecular sieve 32 installed in the nitrogen tower body 31, and a guide pipe 33 installed at the top of the inner cavity of the nitrogen tower body 31, and the guide pipe 33 is connected to the first connecting air outlet pipe 52; a mounting plate 34 for fixing the molecular sieve 32 is provided in the nitrogen tower body 31; the bottom end of the nitrogen tower body 31 is connected to the oxygen compression tower 4 through the second connecting pipe 7.

[0057] The utility model adsorbs nitrogen in the air through the arrangement of the molecular sieve 32, thereby purifying oxygen; guides the gas entering the nitrogen tower body 31 through the arrangement of the guide tube 33, ensuring that all the gas entering the nitrogen adsorption tower 3 will enter the molecular sieve 32; the molecular sieve 32 is fixed through the arrangement of the mounting plate 34. It should be particularly noted that the two mounting plates 34 are only for fixing the molecular sieve 32. The lower mounting plate 34 can be fixedly connected, while the upper mounting plate 34 cannot be fixedly connected by welding or the like, and can be connected by a detachable method such as bolts, or can be left unconnected and movably placed in the nitrogen tower body 31.

[0058] See attached Fig.11 and Fig.12 As shown, in the utility model, the oxygen compression tower 4 includes a compression tower body 41 installed on the base 1, a compression cylinder 42 installed on the top of the inner cavity of the compression tower body 41, a driving motor 43 installed on the outer wall of the compression tower body 41, a crank connecting rod 44 installed on the driving motor 43, a piston 45 installed in the compression cylinder 42 and connected to the crank connecting rod 44, a compression air inlet pipe 421 installed on the compression cylinder 42, an air intake check valve 422 installed on the compression air inlet pipe 421, and a compression air outlet pipe 423 installed on the compression tower body 41 and connected to the top of the inner cavity of the compression cylinder 42, and a pressure regulating valve 424 and an air outlet check valve 425 are installed on the compression air outlet pipe 423.

[0059] The utility model provides a compression space for the compression of purified oxygen by setting a compression cylinder 42; provides a power source for the compression of oxygen by setting a driving motor 43, and can compress oxygen by cooperating with the setting of a piston 45; ensures one-way air intake by setting an air intake check valve 422 to prevent oxygen from being ejected from a compression air intake pipe 421 when the oxygen is compressed; discharges compressed oxygen by setting a compression air outlet pipe 423; ensures that compressed oxygen can be discharged by setting a pressure regulating valve 424 and an air outlet check valve 425, and avoids re-injection of compressed discharged oxygen.

[0060] See attached Figure 1 — Fig.12 As shown, the working principle of the utility model is as follows:

[0061] First, air enters the carbon dioxide adsorption tower 2 along the air inlet pipe 21 through the air pump 22, and the carbon dioxide adsorption tower 2 adsorbs carbon dioxide in the air; specifically, carbon dioxide enters the first tower body 23 along the air inlet pipe 21 through the air pump 22, and contacts the solid adsorbent in the first material exchange structure 25. As the air continues to enter, the first partition plate 24 blocks this part of the air until the air pressure between the bottom of the first partition plate 24 and the first tower body 23 reaches a specified value, pushing the pressure limit block 262 to rise. , so that the gas passing groove 268 and the installation groove 261 are connected, that is, the gas entering the first refueling structure 25 passes through the connecting groove 267, the installation groove 261, and the gas passing groove 268, enters the first main hole 241 and the second main hole 2621, and then is ejected from the first auxiliary hole 243 and the second auxiliary hole 2622, and contacts and adsorbs with the solid adsorbent in the next refueling structure 25; repeat the above process until the air moves from bottom to top, passes through the solid adsorbent in all the refueling structures 25, and is discharged from the first connecting air inlet pipe 51 at the top of the first tower body 23.

[0062] Secondly, the gas discharged through the first connecting air inlet pipe 51 enters the filter drying component 6 for cleaning and drying; specifically, the gas discharged through the carbon dioxide adsorption tower 2 enters the cleaning water 62 through the first connecting air inlet pipe 51, and the gas after passing through the carbon dioxide adsorption tower 2 is cleaned to remove dust and other impurities in this part of the gas; then this part of the gas rises, enters the drying chamber 612 through the ventilation groove 617, contacts with the desiccant in the drying chamber 612, is dried, and then is discharged through the first connecting air outlet pipe 52.

[0063] Again, the gas discharged through the first connecting gas outlet pipe 52 enters the nitrogen adsorption tower 3 to adsorb the nitrogen in the dry part of the gas; specifically, this part of the gas enters the molecular sieve 32 through the guide tube 33, and is discharged from the molecular sieve 32. When the molecular sieve 32 contacts this part of the gas, it will adsorb the nitrogen in the gas. The adsorbed gas is purified oxygen, and then the oxygen is discharged from the nitrogen tower body 31 through the second connecting pipe 7.

[0064] Finally, the oxygen discharged from the nitrogen tower body 31 through the second connecting pipe 7 enters the compression tower body 41 of the oxygen compression tower 4, and the oxygen compression tower 4 compresses the purified oxygen to facilitate the storage of the oxygen; specifically, after the oxygen enters the compression tower body 41, the driving motor 43 drives the piston 45 to reciprocate along the compression cylinder 42 through the crank connecting rod 44 to compress the oxygen, that is, when the piston 45 moves outward along the compression cylinder 42, the air pressure in the compression cylinder 42 decreases, and the oxygen in the compression tower body 41 enters the compression cylinder 42 through the intake check valve 422, and then the piston 45 moves inward to compress the oxygen. When compressed to the specified air pressure, the pressure regulating valve 424 opens to discharge it for storage.

[0065] It should be noted that when the equipment is just running, since there is air inside, it needs to run for a while to empty the air before storage.

[0066] The above embodiments are intended to illustrate the present application, not to limit the present application. Any solution that is a simple transformation of the present application falls within the protection scope of the present application.

Claims

1. An oxygen purification device, comprising a base (1); characterized in that: A carbon dioxide adsorption tower (2), a nitrogen adsorption tower (3) and an oxygen compression tower (4) are installed on the base (1); an air inlet pipe (21) is provided at the bottom end of the carbon dioxide adsorption tower (2), and an air pump (22) is installed on the air inlet pipe (21); a first connecting pipe group (5) connected to the nitrogen adsorption tower (3) is installed on the top of the carbon dioxide adsorption tower (2), and a filter drying component (6) installed on the base (1) is connected to the first connecting pipe group (5); a second connecting pipe (7) connected to the oxygen compression tower (4) is installed at the bottom of the nitrogen adsorption tower (3); The carbon dioxide adsorption tower (2) comprises a first tower body (23) mounted on a base (1), a partition plate (24) mounted inside the first tower body (23), a plurality of material exchange structures (25) detachably mounted on the first tower body (23), and a solid adsorbent mounted inside the first tower body via the material exchange structures (25).

2. The oxygen purification device according to claim 1, characterized in that: The number of the partition plates (24) corresponds to the number of the material changing structures (25), and the partition plates (24) are located above the material changing structures (25); A plurality of the partition plates (24) are each provided with a pressure limiting structure (26); and the first tower body (23) has a square shape.

3. The oxygen purification device according to claim 2, characterized in that: The pressure limiting structure (26) comprises a mounting groove (261) arranged on the partition plate (24), a pressure limiting block (262) installed in the mounting groove (261), a spring (263) with one end in contact with the bottom surface of the pressure limiting block (262), and a sealing ring (264) installed on the side wall of the pressure limiting block (262).

4. The oxygen purification device according to claim 3, characterized in that: The partition plate (24) is further provided with a guide hole (265) connected to the mounting groove (261); the bottom of the pressure limiting block (262) is provided with a guide rod (266) adapted to the guide hole (265); the spring (263) is sleeved on the guide rod (266); the other end of the spring (263) is in contact with the bottom of the mounting groove (261); The partition plate (24) is also provided with a communication groove (267) that is connected to the installation groove (261); and the groove wall of the installation groove (261) is also provided with a gas passage groove (268).

5. The oxygen purification device according to claim 4, characterized in that: First main holes (241) in communication with the air passing groove (268) are provided at equal intervals on the side wall of the partition plate (24), and a blocking block (242) is installed on one end of the first main hole (241) away from the air passing groove (268); a first auxiliary hole (243) in communication with the first main hole (241) is provided on the top of the partition plate (24), and an opening direction of the first auxiliary hole (243) is perpendicular to an opening direction of the first main hole (241); The side surface of the pressure limiting block (262) is provided with second main holes (2621) at equal angles, and the top surface of the pressure limiting block (262) is evenly distributed with second auxiliary holes (2622) connected to the second main holes (2621), and the opening direction of the second auxiliary holes (2622) is perpendicular to the opening direction of the second main holes (2621).

6. The oxygen purification device according to claim 2, characterized in that: The material changing structure (25) comprises a material discharging frame (251) movably mounted on the first tower body (23), a handrail plate (252) mounted on one end of the material discharging frame (251), a support block (253) arranged on a side of the material discharging frame (251), and a slide groove (254) arranged on the first tower body (23) and corresponding to the support block (253); An electromagnet (231) is installed on the outer wall of the first tower body (23), and an iron block (2521) corresponding to the electromagnet (231) is installed on the handrail plate (252); and ventilation holes (2511) are evenly distributed on the bottom of the material discharging frame (251).

7. The oxygen purification device according to claim 1, characterized in that: The first connecting pipe group (5) comprises a first connecting air inlet pipe (51) whose two ends are respectively connected to the carbon dioxide adsorption tower (2) and the filter drying assembly (6) installed on the base (1), and a first connecting air outlet pipe (52) whose two ends are respectively connected to the filter drying assembly (6) and the nitrogen adsorption tower (3).

8. The oxygen purification device according to claim 7, characterized in that: The filter-drying assembly (6) comprises a filter-drying tower (61) mounted on a base (1), clean water (62) and a desiccant (63) mounted in the filter-drying tower (61), and a partition plate (64) mounted in the filter-drying tower (61) for separating the clean water (62) and the desiccant (63). The filter-drying tower (61) is connected to a first connecting air inlet pipe (51) and a first connecting air outlet pipe (52).

9. The oxygen purification device according to claim 8, characterized in that: The partition vertical plate (64) divides the inner cavity of the filter drying tower (61) into a filter cavity (611) and a drying cavity (612); the first connecting air inlet pipe (51) is connected to the filter cavity (611), the cleaning water (62) is located in the filter cavity (611), and the desiccant (63) is located in the drying cavity (612); the connection position between the drying cavity (612) and the first connecting air outlet pipe (52) is located at the bottom end of the drying cavity (612); The end of the first connecting air inlet pipe (51) extends into the cleaning water (62), and the first connecting air inlet pipe (51) is provided with an anti-reverse pipe (511), the anti-reverse pipe (511) is used to connect the first connecting air inlet pipe (51) and the filter chamber (611), and the anti-reverse pipe (511) is provided with a one-way valve (512), and the pipe mouth of the anti-reverse pipe (511) is higher than the liquid level of the cleaning water (62); The filter-drying tower (61) is also provided with a clean water inlet pipe (613), a clean water discharge pipe (614), a desiccant feed pipe (615) and a desiccant discharge pipe (616); the clean water inlet pipe (613) and the clean water discharge pipe (614) are both in communication with the filter cavity (611); and a ventilation groove (617) is formed between the partition vertical plate (64) and the top surface of the inner cavity of the filter-drying tower (61).

10. The oxygen purification device according to claim 1 or 7, characterized in that: The nitrogen adsorption tower (3) comprises a nitrogen tower body (31) mounted on a base (1), a molecular sieve (32) mounted in the nitrogen tower body (31), and a guide pipe (33) mounted on the top of the inner cavity of the nitrogen tower body (31), wherein the guide pipe (33) is connected to a first connecting gas outlet pipe (52); a mounting plate (34) for fixing the molecular sieve (32) is provided in the nitrogen tower body (31); the bottom end of the nitrogen tower body (31) is connected to an oxygen compression tower (4) via a second connecting pipe (7); The oxygen compression tower (4) comprises a compression tower body (41) mounted on a base (1), a compression cylinder (42) mounted on the top of the inner cavity of the compression tower body (41), a driving motor (43) mounted on the outer wall of the compression tower body (41), a crank connecting rod (44) mounted on the driving motor (43), a piston (45) mounted in the compression cylinder (42) and connected to the crank connecting rod (44), a compression air inlet pipe (421) mounted on the compression cylinder (42), an air inlet check valve (422) mounted on the compression air inlet pipe (421), and a compression air outlet pipe (423) mounted on the compression tower body (41) and connected to the top of the inner cavity of the compression cylinder (42), wherein a pressure regulating valve (424) and an air outlet check valve (425) are mounted on the compression air outlet pipe (423).

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