Staged enhanced oxygen buffer device, oxygen generator and buffer method thereof

Abstract

The invention relates to the related technical field of oxygen preparation, in particular to a staged enhanced oxygen buffer device, an oxygen generator and a buffer method thereof.The staged enhanced oxygen buffer device comprises a mounting frame, a buffer tank is fixedly arranged on the mounting frame, and the buffer tank communicates with an adsorption tank fixedly mounted on the mounting frame; an air inlet hole and an air outlet hole are formed in the buffer tank, and a buffer adjusting piece arranged in the buffer tank is located between the air inlet hole and the air outlet hole; the elastic extrusion part is movably arranged in the buffer tank, controlled by a driving part installed in the buffer tank and used for changing the deformation amount of the elastic extrusion part, the deformation amount of the elastic extrusion part is controlled, the oxygen storage amount in the buffer tank is increased stage by stage and then released, the mixing time of the oxygen in the buffer tank can be prolonged, and the mixing efficiency of the oxygen in the buffer tank is improved. Sufficient oxygen in the exhaust pipe is buffered in the buffer tank for a period of time, so that the concentration of the output oxygen can be more stable, and low-purity oxygen is prevented from directly entering an oxygen using end.

Description

Technical Field

[0001] This invention relates to the field of oxygen preparation technology, specifically to a staged enhanced oxygen buffer device, an oxygen generator, and a buffering method thereof. Background Technology

[0002] An oxygen concentrator is a device that separates high-purity oxygen from the air. It utilizes the adsorption properties of molecular sieves, employing physical principles and powered by a high-displacement oil-free compressor, to separate nitrogen and oxygen from the air, ultimately obtaining a high concentration of oxygen. Because oxygen and nitrogen have a wide range of applications, oxygen concentrators are widely used in the national economy, particularly in industries such as metallurgy, chemical engineering, petroleum, and defense.

[0003] In existing molecular sieve oxygen generation processes, there is a time lag between nitrogen adsorption and oxygen release. Therefore, a storage tank is installed; during oxygen release, excess oxygen is discharged into the storage tank for storage. Oxygen generators typically produce oxygen continuously, but user oxygen demand fluctuates. The storage tank acts as a buffer, supplementing the supply during peak demand periods. However, the amount of oxygen stored in the tank should be greater than the real-time oxygen production. If the storage tank reaches its maximum capacity immediately, it can easily increase overall power consumption, potentially damaging the compressor. Summary of the Invention

[0004] The purpose of this invention is to provide a staged enhanced oxygen buffer device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A staged enhanced oxygen buffer device is used to buffer and transport oxygen sieved by the molecular sieve adsorption mechanism. It includes a mounting frame, on which a buffer tank is fixedly mounted, and the buffer tank is connected to an adsorption tank fixedly mounted on the mounting frame. The buffer tank has an air inlet and an air outlet, and the buffer adjustment component disposed inside the buffer tank is located between the air inlet and the air outlet; An elastic compression member is movably disposed within the buffer tank and controlled by a drive member installed within the buffer tank. This is used to change the deformation of the elastic compression member and to increase the buffering capacity of the buffer adjustment member for oxygen within the buffer tank in stages.

[0006] The staged enhanced oxygen buffer device as described above: the buffer adjustment component includes a piston, the piston is arranged along the axis of the buffer tank, and the piston is slidably connected to the inner wall of the buffer tank in a sealing manner, and the piston is always located above the air inlet.

[0007] The staged enhanced oxygen buffer device as described above: the elastic extrusion member includes a pressure plate, the pressure plate is slidably connected to the inner wall of the buffer tank, and a lifting cylinder is fixedly provided on the end of the pressure plate away from the piston; It also includes a spring, one end of which abuts against the piston and the other end of which abuts against the pressure plate.

[0008] The staged enhanced oxygen buffer device described above: at least one set of first and second sliding grooves are formed on the inner wall of the buffer tank, a first slider is provided on the piston to slide and adapt to the first sliding groove, and a second slider is provided on the pressure plate to slide and cooperate with the second sliding groove.

[0009] The staged enhanced oxygen buffer device as described above: the driving component includes a drive shaft rotatably installed inside the buffer tank, one end of the drive shaft passing through the outside of the buffer tank and driven to rotate by a motor fixedly installed at the top of the buffer tank, and the other end forming a first threaded groove; It also includes a transmission rod rotatably installed inside the buffer tank. One end of the transmission rod is threaded to the lifting cylinder with an external thread, and the other end has a limit groove. The transmission rod is connected to the drive shaft through a connecting hoop.

[0010] As described above, the staged enhanced oxygen buffer device has two connecting rings, which are respectively fitted onto the transmission rod and the drive shaft. A second ball is movably disposed on the inner wall of one ring and is slidably adapted to the limiting groove, while a first ball is movably disposed on the inner wall of the other ring and is slidably adapted to the first threaded groove.

[0011] An oxygen generator includes a staged enhanced oxygen buffer device as described in any one of the above claims, and further includes a molecular sieve adsorption mechanism, wherein the molecular sieve adsorption mechanism is capable of sieving oxygen in compressed air, and the excess oxygen is delivered to the staged enhanced oxygen buffer device. A staged enhanced oxygen buffering method, employing the staged enhanced oxygen buffering device as described in any one of the above, includes the following steps: Step 1: The oxygen sieved out in the adsorption tank is transported to the buffer tank. When the oxygen storage in the buffer tank reaches a certain amount, the pressure in the buffer tank increases and exceeds the pressure of the elastic extrusion member on the buffer adjustment member. At this point, the buffer adjustment member can overcome the assistance of the elastic extrusion member and move linearly along the axis of the buffer tank. Step 2: When the buffer adjustment component moves relative to the buffer tank and passes the vent, the oxygen in the buffer tank can be released briefly. Step 3: After some oxygen is released from the buffer tank, the buffer adjustment component resets under the action of the elastic compression component, and the deformation of the elastic compression component increases. After this, when oxygen needs to be released from the buffer tank again, the pressure in the buffer tank must be greater than the elastic force of the elastic compression component itself.

[0012] Compared with the prior art, the beneficial effects of the present invention are: When the driving mechanism is activated, the oxygen enriched by screening in the adsorption tank is transported to the buffer tank. As the oxygen storage increases, the pressure inside the buffer tank exceeds the pressure of the elastic extrusion member on the buffer adjustment member. The buffer adjustment member overcomes the resistance of the elastic extrusion member and moves along the axis of the buffer tank, passing the outlet. This allows the oxygen in the buffer tank to enter the oxygen discharge pipe through the outlet, thus balancing the instantaneous purity difference in the exhaust pipe. Under the drive of the driving mechanism, the deformation of the elastic extrusion member increases in stages, increasing the pressure of the elastic extrusion member on the buffer adjustment member. Subsequently, the oxygen storage in the buffer tank must increase to a certain value before the oxygen in the buffer tank can be released. By releasing the oxygen after a staged increase in oxygen storage, the mixing time of the oxygen in the buffer tank can be extended. The abundant oxygen in the exhaust pipe has a buffering time in the buffer tank, which makes the output oxygen concentration more stable and prevents low-purity oxygen from directly entering the oxygen consumption end. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a phased-enhanced oxygen buffer device.

[0014] Figure 2 This is a schematic diagram of the buffer tank in a phased enhanced oxygen buffer device.

[0015] Figure 3 This is a schematic diagram of the internal structure of the buffer tank in a phased enhanced oxygen buffer device.

[0016] Figure 4 This is a schematic diagram of the piston and outlet in a phased-enhanced oxygen buffer device.

[0017] Figure 5 This is a schematic diagram of the pressure plate and piston in a staged enhanced oxygen buffer device.

[0018] Figure 6 This is a schematic diagram of the drive component and the elastic compression component in a staged enhanced oxygen buffer device.

[0019] Figure 7 This is a schematic diagram of the connecting hoop, drive shaft, and transmission rod in a staged enhanced oxygen buffer device.

[0020] In the diagram: 1. Mounting bracket; 2. Buffer tank; 201. Air inlet; 202. Air outlet; 203. First slide groove; 204. Second slide groove; 3. Adsorption tank; 4. Motor; 5. Piston; 501. First slider; 6. Pressure plate; 601. Second slider; 7. Spring; 8. Support plate; 9. Lifting cylinder; 10. Transmission rod; 1001. Limiting groove; 11. Drive shaft; 1101. First threaded groove; 12. Connecting clamp; 1201. First ball bearing; 1202. Second ball bearing. Detailed Implementation

[0021] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0022] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0023] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0024] Please see Figures 1-7 In this embodiment of the invention, a staged enhanced oxygen buffer device is used to buffer and transport oxygen sieved by the molecular sieve adsorption mechanism. It includes a mounting frame 1, on which a buffer tank 2 is fixedly mounted, and the buffer tank 2 is connected to an adsorption tank 3 fixedly mounted on the mounting frame 1. The buffer tank 2 has an air inlet 201 and an air outlet 202, and the buffer adjustment component disposed in the buffer tank 2 is located between the air inlet 201 and the air outlet 202. An elastic compression member is movable within the buffer tank 2 and controlled by a drive member installed within the buffer tank 2. This is used to change the deformation of the elastic compression member and to increase the buffering capacity of the buffer adjustment member for oxygen in the buffer tank 2 in stages.

[0025] It should be noted that the oxygen exhaust pipe on the adsorption tank 3 can be connected to both the air inlet 201 and the air outlet 202 of the buffer tank 2. This allows some oxygen to enter the buffer tank 3 through the air inlet 201 for storage when the exhaust pipe is rich in oxygen. During the molecular sieve adsorption process, the oxygen concentration may fluctuate briefly. The buffer tank 2 mixes and stores the oxygen, which is then sent into the exhaust pipe through the air outlet 202, thus balancing the instantaneous purity differences.

[0026] In one embodiment, both the air inlet 201 and the air outlet 202 are equipped with one-way valves, ensuring that oxygen in the exhaust pipe can only enter the buffer tank 2 through the air inlet 201, and that oxygen stored in the buffer tank 2 can only enter the exhaust pipe through the air outlet 202. In this embodiment, when the adsorption tank 3 performs gas sieving, the oxygen sieved out in the adsorption tank 3 is enriched and transported to the buffer tank 2 by activating the driving component. As the oxygen storage increases, when the pressure inside the tank exceeds the pressure of the elastic extrusion member on the buffer adjustment member, the buffer adjustment member can overcome the resistance of the elastic extrusion member and move along the axial direction of the buffer tank 2, passing the outlet 202. This allows the oxygen in the buffer tank 2 to enter the oxygen discharge pipe through the outlet 202, thereby balancing the instantaneous purity difference in the exhaust pipe. Under the drive of the driving component, the deformation of the elastic extrusion member itself will increase in stages, increasing the pressure of the elastic extrusion member on the buffer adjustment member. Subsequently, the oxygen storage in the buffer tank 2 must increase to a certain value before the oxygen in the buffer tank 2 can be released. By releasing the oxygen after a staged increase in oxygen storage, the mixing time of the oxygen in the buffer tank 2 can be extended. The abundant oxygen in the exhaust pipe has a buffering time in the buffer tank. At the same time, the output oxygen concentration can be more stable, preventing low-purity oxygen from directly entering the oxygen consumption end.

[0027] As a further solution in this embodiment, please refer to Figure 2 and Figure 3 The buffer adjustment component includes a piston 5, which is arranged along the axis of the buffer tank 2 and is slidably connected to the inner wall of the buffer tank 2. The piston 5 is always located above the air inlet 201.

[0028] The elastic extrusion member includes a pressure plate 6, which is slidably connected to the inner wall of the buffer tank 2, and a lifting cylinder 9 is fixedly provided on the end of the pressure plate 6 away from the piston 5. It also includes a spring 7, one end of which abuts against the piston 5 and the other end of which abuts against the pressure plate 6.

[0029] Preferably, at least one set of first sliding grooves 203 and second sliding grooves 204 are formed on the inner wall of the buffer tank 2, a first slider 501 that is slidably adapted to the first sliding groove 203 is provided on the piston 5, and a second slider 601 that is slidably engaged with the second sliding groove 204 is provided on the pressure plate 6.

[0030] With the cooperation of the first slide groove 203 and the first slider 501, the piston 5 can move linearly along the axis of the buffer tank 2. During the movement of the piston 5, the side wall of the piston 5 and the inner wall of the buffer tank 2 are always sealed to prevent oxygen leakage caused by gaps between the piston 5 and the inner wall of the buffer tank 2. This ensures that the oxygen in the buffer tank 2 can only be discharged from the air outlet 202.

[0031] In this embodiment, initially, spring 7 is compressed, and spring 7 exerts pressure on piston 5. When there is sufficient oxygen discharged from adsorption tank 2, a portion of it will be transported to buffer tank 2. As the oxygen in buffer tank 2 gradually increases, the pressure in buffer tank 2 increases until the pressure in buffer tank 2 exceeds the pressure exerted by spring 7 on piston 5. At this point, piston 5 can overcome the resistance of spring 7 and move along the axis of buffer tank 2 until piston 5 passes the vent 202. After a portion of the oxygen in buffer tank 2 is released, piston 5 can return to its original position under the pressure of spring 7, so that oxygen in buffer tank 2 can be stored again, preparing for subsequent oxygen buffering.

[0032] As a further solution in this embodiment, please refer to Figure 6 and Figure 7 The driving component includes a drive shaft 11 rotatably installed inside the buffer tank 2. One end of the drive shaft 11 passes through the outside of the buffer tank 2 and is driven to rotate by a motor 4 fixedly installed at the top of the buffer tank 2. The other end has a first threaded groove 1101. It also includes a transmission rod 10 rotatably installed inside the buffer tank 2. One end of the transmission rod 10 is threaded to the lifting cylinder 9 with an external thread, and the other end has a limit groove 1001. The transmission rod 10 is connected to the drive shaft 11 through a connecting clamp 12.

[0033] The connecting hoop 12 forms two collars, which are respectively sleeved on the transmission rod 10 and the drive shaft 11. A second ball 1202 that is movably adapted to the limiting groove 1001 is movably disposed on the inner wall of one collar, and a first ball 1201 that is movably adapted to the first threaded groove 1101 is movably disposed on the inner wall of the other collar.

[0034] Preferably, a support plate 8 is fixedly installed inside the buffer tank 2, and the drive shaft 11 and the transmission rod 10 can be rotatably connected to the support plate 8 respectively.

[0035] It should be noted that the limiting groove 1001 is divided into a continuous multi-segment groove, which includes a straight groove and a second threaded groove.

[0036] In the initial state, the first ball 1201 is located at the end of the first threaded groove 1101, while the second ball 1202 is located at the end of the straight groove. When the motor 4 is driven, the output shaft of the motor 4 is fixed to the drive shaft 11. At this time, when the output shaft rotates, it can drive the drive shaft 11 to rotate synchronously. When the drive shaft 11 rotates, the first threaded groove 1101 on it generates an inclined force on the first ball 1201. At this time, the connecting clamp 12 is restricted by the transmission rod 10 and moves in a direction parallel to the axis of the drive shaft 11. When the connecting clamp 12 moves, the second ball 1202 on it slides in the straight groove. At this time, when the drive shaft 11 rotates, the transmission rod 10 does not rotate. Only when the second ball 1202 moves into the second threaded groove... The second ball bearing 1202 exerts an inclined force on the second threaded groove, causing the transmission rod 10 to rotate. Due to the threaded engagement between the transmission rod 10 and the lifting cylinder 9, and under the constraint of the second sliding groove 204 and the second slider 601, the lifting cylinder 9 moves linearly along the axial direction of the transmission rod 10, causing the pressure plate 6 to move downward and the spring 7 to be further compressed, thereby changing the deformation of the spring 7. Through the phased sliding of the second ball bearing 1202 in the second threaded groove, the deformation of the spring 7 is gradually increased, so as to achieve a phased increase in the oxygen storage in the buffer tank 2 before release, thereby prolonging the mixing time of the oxygen in the buffer tank 2, making the output oxygen concentration more stable, and preventing low-purity oxygen from directly entering the oxygen-using end.

[0037] An oxygen generator includes a staged enhanced oxygen buffer device as described in any one of the above claims, and further includes a molecular sieve adsorption mechanism, which is capable of sieving oxygen in compressed air and delivering sufficient oxygen to the staged enhanced oxygen buffer device.

[0038] A staged enhanced oxygen buffering method, employing the staged enhanced oxygen buffering device as described in any one of the above, includes the following steps: Step 1: The oxygen sieved out in the adsorption tank 2 is transported to the buffer tank 3. When the oxygen storage in the buffer tank 2 reaches a certain amount, the pressure in the buffer tank 2 increases and exceeds the pressure of the elastic extrusion member on the buffer adjustment member. When the buffer adjustment member can overcome the assistance of the elastic extrusion member, it can move linearly along the axis of the buffer tank 2. Step 2: When the buffer adjustment component moves relative to the buffer tank 2 and passes the vent 202, the oxygen in the buffer tank 2 can be released briefly. Step 3: After a portion of the oxygen in buffer tank 2 is released, the buffer adjustment component resets under the action of the elastic compression component, and the deformation of the elastic compression component increases. Subsequently, when oxygen in buffer tank 2 needs to be released again, the pressure in buffer tank 2 must be greater than the elastic force of the elastic compression component itself.

[0039] 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.

[0040] 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 staged enhanced oxygen buffer device, comprising a mounting frame (1), characterized in that, A buffer tank (2) is fixedly installed on the mounting frame (1), and the buffer tank (2) is connected to an adsorption tank (3) fixedly installed on the mounting frame (1); The buffer tank (2) has an air inlet (201) and an air outlet (202) formed on it, and the buffer adjustment member disposed in the buffer tank (2) is located between the air inlet (201) and the air outlet (202); An elastic extrusion member is movable within the buffer tank (2) and controlled by a drive member installed within the buffer tank (2) to change the deformation of the elastic extrusion member and to increase the buffering capacity of the buffer adjustment member for oxygen in the buffer tank (2) in stages.

2. The staged enhanced oxygen buffer device according to claim 1, characterized in that, The buffer adjustment component includes a piston (5), which is arranged along the axis of the buffer tank (2) and is slidably connected to the inner wall of the buffer tank (2). The piston (5) is always located above the air inlet (201).

3. The staged enhanced oxygen buffer device according to claim 2, characterized in that, The elastic extrusion member includes a pressure plate (6), which is slidably connected to the inner wall of the buffer tank (2), and a lifting cylinder (9) is fixedly provided on one end of the pressure plate (6) away from the piston (5). It also includes a spring (7), one end of which abuts against the piston (5) and the other end of which abuts against the pressure plate (6).

4. The staged enhanced oxygen buffer device according to claim 3, characterized in that, At least one set of first grooves (203) and second grooves (204) are formed on the inner wall of the buffer tank (2). A first slider (501) is provided on the piston (5) to slide and adapt to the first groove (203). A second slider (601) is provided on the pressure plate (6) to slide and cooperate with the second groove (204).

5. A staged enhanced oxygen buffer device according to claim 4, characterized in that, The driving component includes a drive shaft (11) rotatably installed inside the buffer tank (2). One end of the drive shaft (11) passes through the outside of the buffer tank (2) and is driven to rotate by a motor (4) fixedly installed at the top of the buffer tank (2). The other end has a first threaded groove (1101). It also includes a transmission rod (10) that is rotatably installed in the buffer tank (2). One end of the transmission rod (10) is threaded to the lifting cylinder (9) with an external thread, and the other end has a limit groove (1001). The transmission rod (10) is connected to the drive shaft (11) through a connecting clamp (12).

6. The staged enhanced oxygen buffer device according to claim 5, characterized in that, The connecting hoop (12) forms two collars, which are respectively sleeved on the transmission rod (10) and the drive shaft (11). A second ball (1202) that is movably adapted to the limiting groove (1001) is movably arranged on the inner wall of one collar, and a first ball (1201) that is movably adapted to the first threaded groove (1101) is movably arranged on the inner wall of the other collar.

7. An oxygen generator, characterized in that, The device includes the staged enhanced oxygen buffer device as described in any one of claims 1-6, and further includes a molecular sieve adsorption mechanism, which is capable of sieving oxygen in compressed air and delivering sufficient oxygen to the staged enhanced oxygen buffer device.

8. A staged enhanced oxygen buffering method, characterized in that, The staged enhanced oxygen buffer device as described in any one of claims 1-6 comprises the following steps: Step 1: The oxygen sieved out in the adsorption tank (2) is transported to the buffer tank (3). When the oxygen storage in the buffer tank (2) reaches a certain amount, the pressure in the buffer tank (2) increases and is greater than the pressure of the elastic extrusion member on the buffer adjustment member. When the buffer adjustment member can overcome the assistance of the elastic extrusion member and move in a straight line along the axis of the buffer tank (2). Step 2: When the buffer adjustment component moves relative to the buffer tank (2) and passes the air outlet (202), the oxygen in the buffer tank (2) can be released briefly; Step 3: After a portion of the oxygen in the buffer tank (2) is released, the buffer adjustment component is reset under the action of the elastic extrusion component, and the deformation of the elastic extrusion component increases. After that, when the oxygen in the buffer tank (2) needs to be released again, the pressure in the buffer tank (2) must be greater than the elastic force of the elastic extrusion component itself.

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