A nitrogen generator and a method of generating nitrogen

Abstract

The application discloses a nitrogen generator and a nitrogen production method, and aims to solve the problem that carbon molecular sieve in the adsorption tower can be rubbed and pulverized to generate dust, the dust can directly enter a nitrogen buffer tank, and the downstream user is affected. Technical scheme points are as follows: the nitrogen generator comprises an air buffer tank, an adsorption tower and a nitrogen buffer tank, and is characterized in that: a filter device is arranged between the adsorption tower and the nitrogen buffer tank, the filter device comprises a gas guide pipe connected with the adsorption tower and a gas guide channel connected with the nitrogen buffer tank. The filter device is used for filtering the dust generated by the carbon molecular sieve, ensuring the use safety of the user, and a gas guide reversing mechanism is used for realizing the state that one of the two gas guide channels is opened and the other is closed, so that when the filter grid of one of the two gas guide channels needs to be replaced, the nitrogen production process is ensured to be uninterrupted by switching the other gas guide channel, and the use effect is ensured.

Description

Technical Field

[0001] This invention relates to a nitrogen generator and a nitrogen generation method, and more specifically, to a nitrogen generator and a nitrogen generation method. Background Technology

[0002] The existing nitrogen generator consists of an air buffer tank, an adsorption tower, and a nitrogen buffer tank. Air enters the adsorption tower from the air buffer tank for oxygen-nitrogen separation. The resulting high-purity nitrogen enters the nitrogen buffer tank and is then delivered to downstream users through the outlet pipeline of the nitrogen buffer tank. Under the impact of the incoming and outgoing airflow, the carbon molecular sieve inside the adsorption tower will be pulverized by friction, generating dust. This dust will directly enter the nitrogen buffer tank, affecting downstream users.

[0003] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a nitrogen generator and a nitrogen generation method to solve the above-mentioned problems.

[0005] The present invention achieves the above-mentioned objective through the following technical solution: a nitrogen generator, comprising an air buffer tank, an adsorption tower, and a nitrogen buffer tank, characterized in that: a filter device is connected between the adsorption tower and the nitrogen buffer tank, the filter device comprising a gas guiding conduit connected to the adsorption tower and a gas guiding channel connected to the nitrogen buffer tank, the gas guiding channel being provided with two channels and symmetrically connected at both ends of the gas guiding conduit, a filter mesh being provided inside the gas guiding channel, a gas guiding reversing mechanism being provided inside the gas guiding conduit, and a transmission mechanism being connected between the gas guiding reversing mechanism and the filter mesh.

[0006] The present invention is further configured such that: the transmission mechanism includes a support frame fixedly disposed inside the air guide channel and a pulling component connected to the air guide reversing mechanism; the filter mesh is slidably disposed on the support frame; and the end of the pulling component away from the air guide reversing mechanism is located on the side of the filter mesh away from the air guide duct.

[0007] The present invention is further configured such that: the transmission mechanism further includes a power storage component disposed on the support frame, the power storage component being located between the filter mesh and the pulling component.

[0008] The present invention is further configured such that: the pulling component includes a displacement member slidably disposed on the support frame and a connecting member for connecting the displacement member with the air diversion mechanism, wherein the displacement member is located on the side of the filter mesh away from the air inlet.

[0009] The present invention is further configured such that: the connecting member includes a sliding part and a connecting rope connected to the air guiding and reversing mechanism; the sliding part is slidably disposed inside the support frame; and the support frame is provided with a groove for the displacement member to extend to the inner sliding part and be fixedly connected; the sliding part and the connecting rope are detachably connected.

[0010] The present invention is further configured such that: the power storage component includes an elastic element that abuts against the filter mesh and the displacement member, and a snap-fit ​​member that fixes the displacement member to the support frame; the filter mesh is provided with a release member for releasing the snap-fit ​​member; a guide rod for sleeve of the elastic element is fixedly provided on the side of the filter mesh near the displacement member; a one-way snap-fit ​​member for restricting the movement direction of the filter mesh is rotatably provided on the outer wall of the support frame; and a torsion spring is provided between the one-way snap-fit ​​member and the support frame.

[0011] The present invention is further configured such that: the air guiding and reversing mechanism includes a shielding member fixedly disposed in the air guiding duct and a sealing member rotatably disposed in the air guiding duct. Both the shielding member and the sealing member have notches for guiding air. There are two shielding members and two sealing members, which are symmetrically disposed at both ends of the air guiding duct. The notches of the two shielding members are in the same position, and the notches of the two sealing members are misaligned. A connecting rod is provided between the two sealing members, and the connecting rod is connected to a transmission mechanism.

[0012] The invention is further configured such that: both ends of the connecting rod extend to the outside of the air guide tube, and handles are fixedly connected to the extended ends of the connecting rod; the outer wall of the air guide tube is provided with marking scales for observing the internal state corresponding to the handles; and a valve is provided on the side of the air guide channel away from the air guide tube from the filter mesh.

[0013] The present invention is further configured such that: a disassembly section is provided at the position of the transmission mechanism corresponding to the air guide channel, and the disassembly section is disassembled and connected to the air guide channel through a threaded component.

[0014] A nitrogen production method, comprising

[0015] S1, Compressed Air: Air is compressed by a compressor to reach 15 bar;

[0016] S2, Adsorption: Compressed air is guided into the air buffer tank and then into the adsorption tower. The adsorbent in the adsorption tower adsorbs oxygen and other impurity gases, while nitrogen passes through.

[0017] S3. Filtration: Nitrogen gas after the adsorption tower is guided to a filtration device to filter impurities from the nitrogen gas.

[0018] S4, Output: Nitrogen enters the nitrogen buffer tank and is delivered to downstream users through the outlet pipeline of the nitrogen buffer tank.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The filter device is used to filter the dust generated by the carbon molecular sieve, ensuring user safety. The gas diversion mechanism keeps the two gas channels in a state where one is open and the other is closed. This allows the nitrogen generation process to continue uninterrupted and ensures the best performance when the filter mesh in one gas channel needs to be replaced. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the filtration device.

[0023] Figure 3 This is a schematic cross-sectional view of the filtration device.

[0024] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the diagram;

[0025] Figure 5 Schematic diagram of the connection structure between the air guiding reversing mechanism and the transmission mechanism Figure 1 ;

[0026] Figure 6 Schematic diagram of the connection structure between the air guiding reversing mechanism and the transmission mechanism Figure 2 ;

[0027] Figure 7 This is a schematic diagram of the structure of the snap-fit ​​component within the filter mesh.

[0028] Reference numerals: 1. Air buffer tank; 2. Adsorption tower; 3. Nitrogen buffer tank; 4. Gas duct; 5. Gas channel; 6. Filter mesh; 7. Support frame; 8. Displacement component; 9. Sliding part; 10. Connecting rope; 11. Slide groove; 12. Elastic element; 13. Release component; 14. Guide rod; 15. One-way locking component; 16. Valve; 17. Blocking component; 18. Sealing component; 19. Notch; 20. Connecting rod; 21. Handle; 22. Marking scale; 23. Disassembly section; 24. Snap-fit ​​component; 25. Magnetic component; 26. Threaded component. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In this description, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example:

[0031] A nitrogen generator and a nitrogen generation method, such as Figures 1-2 As shown, the system includes an air buffer tank 1, an adsorption tower 2, and a nitrogen buffer tank 3. The adsorbent inside the adsorption tower 2 adopts a carbon molecular sieve structure to achieve good nitrogen production. A filter device is installed between the adsorption tower 2 and the nitrogen buffer tank 3 to filter the dust generated by the carbon molecular sieve, ensuring user safety. The filter device includes a gas guide pipe 4 connected to the adsorption tower 2 and a gas guide channel 5 connected to the nitrogen buffer tank 3. There are two gas guide channels 5, symmetrically connected at both ends of the gas guide pipe 4. A filter mesh 6 is installed inside the gas guide channel 5 to achieve the dust filtration effect. A gas guide reversing mechanism is installed inside the gas guide pipe 4. A transmission mechanism is installed between the gas guide reversing mechanism and the filter mesh 6. The gas guide reversing mechanism enables the two gas guide channels 5 to be in an open and closed state, so that when the filter mesh 6 of one gas guide channel 5 needs to be replaced, the other gas guide channel 5 can be switched to ensure uninterrupted nitrogen production and maintain the operating effect.

[0032] like Figures 2-6 As shown, the transmission mechanism includes a support frame 7 fixedly installed inside the air guide channel 5 and a pulling component connected to the air guide reversing mechanism. The filter mesh 6 is slidably installed on the support frame 7. When dust adheres to the filter mesh 6, nitrogen gas passing through the filter mesh 6 will generate a thrust on the filter mesh 6, thereby pushing the filter mesh 6 to slide on the support frame 7 away from the air guide duct 4. The end of the pulling component away from the air guide reversing mechanism is located on the side of the filter mesh 6 away from the air guide duct 4. Thus, the filter mesh 6 will come into contact with the pulling component during the sliding process, and the pulling component will pull the air guide reversing mechanism to realize the switching of the air guide channel 5. At this time, it also means that the filter mesh 6 needs to be cleaned and replaced, so as to ensure the timeliness of the cleaning and replacement of the filter mesh 6.

[0033] like Figures 2-4 As shown, the transmission mechanism also includes a power storage component mounted on the support frame 7. The power storage component is located between the filter mesh 6 and the pulling component. When the filter mesh 6 starts to move, the filter mesh 6 will form an interaction force with the power storage component, so that the power storage component will form a power storage effect. After the power is stored to a suitable level, it will apply a thrust to the pulling component, so that the pulling component can quickly pull the air diversion mechanism to achieve a rapid diversion effect and ensure the flexible switching of the air channel 5.

[0034] Among them, such as Figures 2-6 As shown, the pulling component includes a displacement member 8 slidably mounted on the support frame 7 and a connecting member for connecting the displacement member 8 to the air diversion mechanism. The displacement member 8 is located on the side of the filter grid 6 away from the air inlet, so that the power storage component applies a thrust to the displacement member 8, causing the displacement member 8 to pull the air diversion mechanism through the connecting member, thereby achieving a rapid diversion effect and ensuring flexible switching of the air diversion channel 5.

[0035] like Figures 2-6 As shown, the connector includes a sliding part 9 and a connecting rope 10 connected to the air diversion mechanism. The sliding part 9 is slidably disposed inside the support frame 7, and the support frame 7 is provided with a groove 11 for the displacement member 8 to extend into the inner sliding part 9 and be fixedly connected. Thus, when the displacement member 8 moves, it pulls the connecting rope 10 through the sliding part 9, thereby realizing the rapid diversion of the air diversion mechanism. The sliding part 9 and the connecting rope 10 can be detached and connected, so that when the filter mesh 6 needs to be replaced, the sliding part 9 and the connecting rope 10 can be separated, so that the filter mesh 6 can be easily removed.

[0036] like Figures 2-6 As shown, the energy storage component includes an elastic element 12 that abuts against the filter mesh 6 and the displacement member 8, and a snap-fit ​​member 24 that fixes the displacement member 8 to the support frame 7. When the filter mesh 6 moves closer to the displacement member 8, the filter mesh 6 compresses the elastic element 12 to create an energy storage effect. The filter mesh 6 is also provided with a release member 13 for releasing the snap-fit ​​member 24. As the filter mesh 6 approaches the displacement member 8, the release member 13 contacts the snap-fit ​​member 24 and pushes the snap-fit ​​member 24 to move, thus releasing the snap-fit ​​effect and making the displacement member 8 movable. Then, the elastic element 12 releases elastic thrust to push the displacement member 8 to move, thereby achieving a rapid reversal effect.

[0037] At the same time, such as Figures 2-6As shown, a one-way latch 15 is rotatably provided on the outer wall of the support frame 7 to restrict the movement direction of the filter mesh 6. The one-way latch 15 is located at the position where the filter mesh 6 moves to the release member 13 and the latching member 24. Thus, when the filter mesh 6 moves further, the filter mesh 6 will pass through the one-way latch 15, so that the one-way latch 15 forms an anti-reverse effect on the filter mesh 6, ensuring that the elastic element 12 will stably push the displacement member 8 to move. A torsion spring is provided between the one-way latch 15 and the support frame 7, and the position of the one-way latch 15 is kept stable by the torsion spring.

[0038] The filter mesh 6 is fixedly provided with a guide rod 14 for the elastic element 12 to be sleeved on the side close to the displacement member 8. The guide rod 14 provides a guiding effect for the elastic element 12 and ensures the stability of the elastic element 12 during the compression process.

[0039] At the same time, such as Figure 7 As shown, the snap-fit ​​24 is slidably disposed on the displacement member 8. The displacement member 8 has a magnetic member 25 that is the same polarity as the snap-fit ​​24 but repulsive to it on the side of the snap-fit ​​24 away from the support frame 7. Meanwhile, the support frame 7 has a groove for the snap-fit ​​24 to be inserted.

[0040] like Figures 5-6 As shown, the air guiding and reversing mechanism includes a shielding member 17 fixedly disposed in the air guiding duct 4 and a sealing member 18 rotatably disposed in the air guiding duct 4. Both the shielding member 17 and the sealing member 18 are provided with notches 19 for air guiding. There are two shielding members 17 and two sealing members 18, which are symmetrically disposed at both ends of the air guiding duct 4. The notches 19 of the two shielding members 17 are in the same position, while the notches 19 of the two sealing members 18 are misaligned. As a result, the two ends of the air guiding duct 4 will form a state where one end is open and the other end is closed. A connecting rod 20 is provided between the two sealing members 18. The connecting rod 20 is connected to the transmission mechanism to realize the switching between the open and closed states of the two ends of the air guiding duct 4.

[0041] At the same time, such as Figures 2-3As shown, both ends of the connecting rod 20 extend to the outside of the air guide tube 4, and handles 21 are fixedly connected to the extended ends of the connecting rod 20. The outer wall of the air guide tube 4 is provided with markings 22 corresponding to the handles 21 for observing the internal status. By observing the position of the handles 21 corresponding to the markings 22, it can be determined whether the filter mesh 6 needs to be replaced. Simultaneously, a valve 16 is provided on the side of the air guide channel 5 away from the air guide tube 4 where the filter mesh 6 is located. When the filter mesh 6 needs to be replaced, closing the valve 16 closes the air guide channel 5, thus sealing the air guide channel 5. A disassembly section 23 is provided in the air guide channel 5 corresponding to the transmission mechanism position. The disassembly section 23 is detachably connected to the air guide channel 5 via a threaded component 26, and then the disassembly section 23 can be removed using the threaded component 26. The need to replace the filter mesh 6 is met. At the same time, the ends of the two air channels 5 away from the air duct 4 are connected to form an interface with the nitrogen buffer tank 3. Therefore, during the reinstallation process, the side of the disassembled section 23 near the valve 16 can be re-fixed with the threaded part 26 first, and then the valve 16 can be reopened to allow nitrogen to flow back into the air channel 5. At this time, the other end of the disassembled section 23 is not yet sealed and fixed, so all the air inside the disassembled section 23 can be discharged. Then, the other end can be sealed and fixed with the threaded part 26 to prevent a large amount of air from being mixed in after replacing the filter mesh 6. The threaded part 26 is a hollow sleeve structure with internal threads on the inner wall, and the air channel 5 has corresponding external threads to achieve the sealing and fixing effect of the threaded part 26.

[0042] A nitrogen production method, characterized in that:

[0043] S1, Compressed Air: Air is compressed by a compressor to reach 15 bar;

[0044] S2, Adsorption: Compressed air is guided into air buffer tank 1 and then into adsorption tower 2. Oxygen and other impurity gases are adsorbed by the adsorbent in adsorption tower 2, while nitrogen passes through.

[0045] S3, Filtration: Nitrogen gas after adsorption tower 2 is guided to a filtration device for impurity filtration.

[0046] S4, Output: Nitrogen enters nitrogen buffer tank 3 and is delivered to downstream users through the outlet pipeline of nitrogen buffer tank 3.

[0047] Working Principle: Air enters the adsorption tower 2 from the air buffer tank 1 for oxygen-nitrogen separation, resulting in high-purity nitrogen. The high-purity nitrogen then flows through the guide duct 4. At this point, the notch 19 on the shield 17 and the sealing member 18 at one end of the guide duct 4 is connected, allowing the high-purity nitrogen to flow through the guide channel 5 via the connected notch 19. The high-purity nitrogen then passes through the filter mesh 6, where it is filtered, causing impurities to adhere to it. As the amount of impurities adheres, the resistance to the high-purity nitrogen passing through the filter mesh 6 increases, creating a pushing force on the filter mesh 6. This causes the filter mesh 6 to move closer to the elastic element 12. Meanwhile, the displacement member 8 remains fixed, keeping the elastic element 12 in a compressed, energy-storing state. As the amount of impurities adheres, the filter mesh 6 moves further, and the degree of compression of the elastic element 12 gradually increases. When the release member 13 on the filter mesh 6... When the filter mesh 6 comes into contact with the snap-fit ​​24, it contacts and passes through the one-way snap-fit ​​15, preventing the filter mesh 6 from retracting. As the filter mesh 6 moves further, it pushes the snap-fit ​​24 upward, releasing the fixation of the displacement member 8. The elastic element 12 then releases its elastic thrust. Due to the restriction of the one-way snap-fit ​​15, the thrust pushes the displacement member 8 to move. The displacement member 8 pulls the connecting rod 20 to rotate via the sliding part 9 and the connecting rope 10, thereby changing the misalignment of the notch 19 on the shield 17 and the sealing part 18 on one side of the connection, achieving a sealing effect. At the same time, the notch 19 on the shield 17 and the sealing part 18 on the other side are connected, thereby opening the air passage 5 on the other side. The rotation of the connecting rod 20 will change the position of the handle 21 on the marking scale 22, allowing the operator to check the position of the handle 21 to know the current status of the internal filter mesh 6.

[0048] When the filter mesh 6 needs to be replaced, the air inlet of the current air guide channel 5 is closed. Therefore, the valve 16 corresponding to the filter mesh 6 is closed first, so that the air guide channel 5 is closed at both ends of the filter mesh 6. The disassembly section 23 is removed from the air guide channel 5 through the threaded part 26, and then the filter mesh 6 is replaced. The sliding part 9 is disconnected from the connecting rope 10, so that the sliding part 9 is separated from the connecting rope 10, thereby ensuring the normal replacement of the filter mesh 6.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A nitrogen generator, comprising an air buffer tank (1), an adsorption tower (2), and a nitrogen buffer tank (3), characterized in that: A filter device is connected between the adsorption tower (2) and the nitrogen buffer tank (3). The filter device includes a gas guide pipe (4) connected to the adsorption tower (2) and a gas guide channel (5) connected to the nitrogen buffer tank (3). There are two gas guide channels (5), which are symmetrically connected to both ends of the gas guide pipe (4). A filter grid (6) is provided inside the gas guide channel (5). A gas guide reversing mechanism is provided inside the gas guide pipe (4). A transmission mechanism is connected between the gas guide reversing mechanism and the filter grid (6). The transmission mechanism includes a support frame (7) fixedly installed inside the air guide channel (5), a displacement member (8) slidably installed on the support frame (7), an elastic element (12) abutting between the filter mesh (6) and the displacement member (8), and a snap-fit ​​member (24) fixing the displacement member (8) on the support frame (7). The filter mesh (6) is slidably installed on the support frame (7), and the filter mesh (6) is provided with a release member (13) for releasing the snap-fit ​​member (24). The displacement member (8) is located on the side of the filter mesh away from the air inlet. The air guide channel (5) is provided with a disassembly section (23) at the position corresponding to the transmission mechanism. The disassembly section (23) is detachably connected to the air guide channel (5) through a threaded part (26). The air duct (5) is provided with a valve (16) on the side of the filter mesh (6) away from the air duct (4).

2. A nitrogen generator according to claim 1, characterized in that: The transmission mechanism also includes a connector for connecting the displacement member (8) and the air diversion mechanism. The connector includes a sliding part (9) and a connecting rope (10) connected to the air diversion mechanism. The sliding part (9) is slidably disposed inside the support frame, and the support frame (7) is provided with a groove (11) for the displacement member (8) to extend to the inner sliding part (9) and be fixedly connected. The sliding part (9) and the connecting rope (10) are detachably connected.

3. A nitrogen generator according to claim 1, characterized in that: The filter mesh (6) is fixedly provided with a guide rod (14) for sleeve of the elastic element (12) on the side near the displacement member (8). A one-way clamp (15) for restricting the movement direction of the filter mesh (6) is rotatably provided on the outer wall of the support frame (7). A torsion spring is provided between the one-way clamp (15) and the support frame (7).

4. A nitrogen generator according to claim 1, characterized in that: The air guiding and reversing mechanism includes a shield (17) fixedly installed in the air guiding duct (4) and a closure (18) rotatably installed in the air guiding duct (4). Both the shield (17) and the closure (18) are provided with notches (19) for guiding air. There are two shields (17) and two closures (18), which are symmetrically arranged at both ends of the air guiding duct (4). The notches (19) of the two shields (17) are in the same position, and the notches (19) of the two closures (18) are misaligned. A connecting rod (20) is provided between the two closures (18), and the connecting rod (20) is connected to the transmission mechanism.

5. A nitrogen generator according to claim 4, characterized in that: Both ends of the connecting rod (20) extend to the outside of the air duct (4), and handles (21) are fixedly connected to the extended ends of the connecting rod (20). The outer wall of the air duct (4) is provided with marking scales (22) for observing the internal state corresponding to the handles (21).

6. A nitrogen generation method using a nitrogen generator according to any one of claims 1 to 5, characterized in that: include S1, Compressed Air: Air is compressed by a compressor to reach 15 bar; S2, Adsorption: Compressed air is guided into the air buffer tank (1) and then into the adsorption tower (2). The adsorbent in the adsorption tower (2) adsorbs oxygen and other impurity gases, while nitrogen passes through. S3, Filtration: Nitrogen gas after passing through the adsorption tower (2) is guided to a filtration device to filter impurities from the nitrogen gas; S4, Output: Nitrogen enters the nitrogen buffer tank (3) and is delivered to downstream users through the outlet pipeline of the nitrogen buffer tank (3).

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