Oxygen backflow backflushing structure applied to molecular sieve oxygen generator

Abstract

The utility model discloses an oxygen backflow backflushing structure applied to a molecular sieve oxygenerator, and relates to the technical field of molecular sieve oxygenerators, the bottom of an adsorption tower body is fixedly provided with a tower bottom, an input pipe is fixedly arranged on the tower bottom, the input pipe is provided with a downward air inlet, a backflushing mechanism is arranged on the air inlet, an air outlet pipe and the air inlet are fixedly arranged, and the backflushing mechanism is arranged on the air outlet pipe. The gas outlet pipe and the adsorption tower body are coaxial, the backflushing hopper is axially and slidably mounted below the gas outlet pipe, gas enters the gas outlet pipe from a gas inlet of the input pipe, the distance between the backflushing hopper and the bottom of the tower bottom is adjusted by the gas through the speed adjusting mechanism, the gas impacts the bottom of the tower bottom, and gas flow diverges and rises into the adsorption tower body in a water splashing manner; a screen is fixedly mounted in the adsorption tower body, a bushing is arranged between the screen and the input pipe, and the molecular sieve is arranged above the screen. According to the utility model, the pulverization time of the molecular sieve can be prolonged; the utilization rate of the molecular sieve can be improved.

Description

Technical Field

[0001] This utility model relates to the field of molecular sieve oxygen generator technology, and in particular to an oxygen reflux backflushing structure applied to a molecular sieve oxygen generator. Background Technology

[0002] The main function of molecular sieves in oxygen concentrators is to adsorb impurities such as nitrogen from the air, thereby separating oxygen to produce high-purity oxygen. Gases flow in a straight, funnel-shaped pattern when there are no obstructions or other interferences.

[0003] In the old structure, the air inlet is a cylindrical filter screen, with molecular sieves piled up around it. When air comes out of the column hole, it will be blocked by the molecular sieve and will preferentially spread upward. The air pressure around the perimeter will be lower than the air pressure in the middle. The gas flow rate is high in the middle and low around the perimeter, which results in the utilization rate of the molecular sieves at the bottom and the lower part of the tank being lower than that of the middle and upper parts.

[0004] In equipment such as oxygen concentrators, molecular sieves rub against each other as gas flows. Frequent fluctuations or sudden changes in system pressure can subject the molecular sieve particles to uneven stress. When this stress exceeds the molecular sieve's tolerance limit, the particles will crack or even break, eventually pulverizing. For example, rapid pressure changes during oxygen concentrator startup, shutdown, or gas volume adjustments can damage the molecular sieves.

[0005] Therefore, there is an urgent need for an oxygen reflux backflushing structure for use in molecular sieve oxygen generators to address the existing problems. Utility Model Content

[0006] To address the aforementioned technical problems, the present invention adopts the following technical solution: an oxygen reflux backflushing structure for a molecular sieve oxygen generator, comprising a main body and a backflushing mechanism. The main body includes an adsorption tower and an input pipe. A tower bottom is fixedly installed at the bottom of the adsorption tower, and the input pipe is fixedly installed on the tower bottom. A downward-facing air inlet is provided on the input pipe. The backflushing mechanism is located on the air inlet. The backflushing mechanism includes an outlet pipe and a backflushing bucket. The outlet pipe is fixedly installed with the air inlet and is coaxial with the adsorption tower. The backflushing bucket is axially slidably installed below the outlet pipe. A speed regulating mechanism is symmetrically arranged between the outlet pipe and the backflushing bucket. Gas enters the interior of the outlet pipe from the air inlet of the input pipe. The distance between the backflushing bucket and the bottom of the tower is adjusted by the speed regulating mechanism. The gas impacts the bottom of the tower, and the airflow disperses and rises into the interior of the adsorption tower in a splashing manner. A screen is fixedly installed inside the adsorption tower, and a perforated plate is provided between the screen and the input pipe. A molecular sieve is located above the screen.

[0007] Furthermore, the bottom of the tower is elliptical. This elliptical bottom design allows the gas to disperse in a splashing motion, facilitating its dispersion into the cross-section of the adsorption tower.

[0008] Furthermore, the backflushing bucket is funnel-shaped, and an output pipe is provided above the backflushing bucket, which is axially slidably installed below the gas outlet pipe. The gas flowing out from the inlet flows through the gas outlet pipe to the backflushing bucket. After colliding with the bottom of the tower, the gas flowing out from the backflushing bucket disperses to the edge of the adsorption tower. The backflushing bucket is designed in a funnel shape to expand the gas dispersion area.

[0009] Furthermore, the speed regulating mechanism includes a blade and a speed regulating assembly. The blade is rotatably mounted on a pin seat in the outlet pipe, and the speed regulating assembly is disposed between the output pipe and the outlet pipe. The gear of the speed regulating assembly is rotatably mounted on the pin seat, and the gear is fixedly mounted to the blade. When the gas passes through the outlet pipe and the backwash bucket, it impacts the blade, causing the blade to rotate on the pin seat. The blade drives the gear to rotate. The greater the gas flow velocity, the greater the rotation angle of the blade and the gear.

[0010] Furthermore, the speed regulating component also includes a rack, which is axially fixed inside the output pipe, and the gear meshes with the rack. When the gear rotates, it drives the rack to move, causing the output pipe and the gas outlet pipe to slide relative to each other, thereby adjusting the distance between the backwash bucket and the bottom of the tower. As the gas flow velocity increases, the rotation angle of the gear increases, and the relative displacement between the output pipe and the gas outlet pipe increases, thus increasing the distance between the backwash bucket and the bottom of the tower. This reduces the velocity of the gas after impacting the bottom of the tower, reduces the impact on the molecular sieve, and prolongs the pulverization time of the molecular sieve.

[0011] Furthermore, the recoil mechanism also includes a spring, which is disposed between the input pipe and the recoil bucket and is slidably mounted outside the outlet pipe. Utilizing the elasticity of the spring, when the gas flow velocity at the inlet of the input pipe decreases, the spring assists the recoil bucket in returning to its initial position, reducing the distance between the recoil bucket and the bottom of the tower.

[0012] Furthermore, the perforated plate is rotatably installed inside the adsorption tower body, and a fan blade is provided below the perforated plate. Gas backflowing from the bottom of the tower towards the adsorption tower body flows through the perforated plate, which homogenizes the gas distribution. With the assistance of the fan blade 411, the impact of the gas on the perforated plate 41 causes it to rotate inside the adsorption tower body 11, further homogenizing the gas distribution. When the gas passes through the molecular sieve, it will pass through to the maximum extent evenly, improving the utilization rate of the molecular sieve.

[0013] Furthermore, a bearing is installed between the perforated plate and the interior of the adsorption tower, with the bearing fitted onto the outside of the perforated plate. The bearing reduces the coefficient of friction between the perforated plate and the adsorption tower, allowing the bearing to rotate smoothly inside the adsorption tower.

[0014] The advantages of this utility model compared with the prior art are: (1) This utility model is designed with a downward-facing air inlet and an elliptical bottom of the tower, so that when the gas enters the input pipe and flows to the bottom of the tower, it hits the elliptical bottom of the tower, and the airflow will be dispersed in a splashing manner, which facilitates the gas to disperse into the cross-section of the adsorption tower body; (2) This utility model is equipped with a backwash bucket. After the gas flowing out of the backwash bucket hits the bottom of the tower, it disperses to the edge of the adsorption tower body. The backwash bucket is designed in the shape of a funnel to expand the gas dispersion area; (3) This utility model is equipped with a speed regulating mechanism, which adjusts the backwash bucket and the bottom of the tower. The distance at the bottom increases the gas flow speed, the rotation angle of the gear increases, and the relative displacement between the output pipe and the outlet pipe increases. This increases the distance between the backflush bucket and the bottom of the tower, thereby reducing the speed of the gas after impacting the bottom of the tower, reducing the impact on the molecular sieve, and extending the pulverization time of the molecular sieve. (4) This utility model is equipped with a sluice plate. The gas backflush from the bottom of the tower to the adsorption tower flows through the sluice plate. The holes on the sluice plate homogenize the gas distribution. With the assistance of the fan blades 411, the gas impacts the sluice plate 41, causing it to rotate inside the adsorption tower 11, further homogenizing the gas distribution and improving the utilization rate of the molecular sieve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model from a first-view perspective.

[0016] Figure 2 This is the front view of the present invention.

[0017] Figure 3 This is the left view of the present invention.

[0018] Figure 4 for Figure 2 Cross-sectional view along the AA direction.

[0019] Figure 5 for Figure 2 Cross-sectional view along the BB direction.

[0020] Figure 6 for Figure 3 Cross-sectional view along the CC direction.

[0021] Figure 7 for Figure 3 Cross-sectional view along the DD direction.

[0022] Figure 8 for Figure 4 A magnified view of part E in the middle.

[0023] Figure 9 for Figure 4 A magnified view of part F in the middle.

[0024] Figure 10 for Figure 7A magnified view of part G in the middle.

[0025] Figure 11 for Figure 9 A magnified view of part H in the middle.

[0026] Reference numerals: 11-Adsorption tower body; 12-Tower bottom; 13-Input pipe; 14-Screen; 21-Output pipe; 22-Backlash bucket; 23-Spring; 221-Output pipe; 211-Pin seat; 31-Blade plate; 32-Speed ​​control assembly; 321-Gear; 322-Rack; 41-Strain plate; 42-Bearing; 411-Fan blade. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Example: Figures 1-11 The oxygen reflux backflushing structure shown is applied to a molecular sieve oxygen generator and includes a main body and a backflushing mechanism. The main body includes an adsorption tower 11 and an input pipe 13. A tower bottom 12 is fixedly installed at the bottom of the adsorption tower 11, and the input pipe 13 is fixedly installed on the tower bottom 12. The input pipe 13 is provided with a downward-facing air inlet. The backflushing mechanism is located on the air inlet and includes an outlet pipe 21 and a backflushing bucket 22. The outlet pipe 21 is fixedly installed with the air inlet and is coaxial with the adsorption tower 11. The backflushing bucket 22... 2. The axial sliding installation is located below the outlet pipe 21. A speed regulating mechanism is symmetrically arranged between the outlet pipe 21 and the backwash bucket 22. Gas enters the interior of the outlet pipe 21 from the inlet of the input pipe 13. The gas adjusts the distance between the backwash bucket 22 and the bottom of the tower bottom 12 through the speed regulating mechanism. The gas hits the bottom of the tower bottom 12, and the gas flow rises into the adsorption tower body 11 in a splashing manner. A screen 14 is fixedly installed inside the adsorption tower body 11. A baffle plate 41 is arranged between the screen 14 and the input pipe 13. The molecular sieve is arranged above the screen 14.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6As shown, the main structure includes an adsorption tower body 11, a tower bottom 12, an input pipe 13, and a screen 14. The tower bottom 12 is fixedly installed at the bottom of the adsorption tower body 11, and the bottom of the tower bottom 12 is elliptical. The input pipe 13 is fixedly installed on the tower bottom 12, and a downward-facing air inlet is provided on the input pipe 13. The screen 14 is located above the input pipe 13 and is fixedly installed inside the adsorption tower body 11. A molecular sieve is provided inside the adsorption tower body 11, and the molecular sieve is located above the screen 14. The screen 14 separates the molecular sieve from the equalization mechanism. The downward-facing design of the air inlet allows the gas to impact the elliptical bottom of the tower bottom 12 when it enters the input pipe 13 and flows towards the tower bottom 12. The airflow will then disperse in a splashing manner, facilitating the dispersion of the gas into the cross-section of the adsorption tower body 11.

[0030] like Figure 2 , Figure 7 , Figure 9 , Figure 10 As shown, the backflushing mechanism is installed on the air inlet. The backflushing mechanism includes an outlet pipe 21, a backflushing bucket 22, and a spring 23. The outlet pipe 21 is coaxial with the adsorption tower body 11 and is fixedly installed with the air inlet. An output pipe 221 is provided on the backflushing bucket 22. The output pipe 221 of the backflushing bucket 22 is axially slidably installed below the outlet pipe 21. The backflushing bucket 22 is funnel-shaped. Gas flows from the air inlet through the outlet pipe 21 to the backflushing bucket 22. The gas flowing out of the backflushing bucket 22 collides with the bottom of the tower bottom 12. After impact, the gas disperses to the edge of the adsorption tower 11. The backwash bucket 22 is designed in a funnel shape to expand the dispersion area of ​​the gas. The spring 23 is set between the input pipe 13 and the backwash bucket 22. The spring 23 is slidably installed outside the outlet pipe 21. Utilizing the elastic effect of the spring 23, when the flow velocity of the gas at the inlet of the input pipe 13 decreases, it assists the backwash bucket 22 in returning to its initial position and reducing the distance between the backwash bucket 22 and the bottom of the tower 12. Two sets of pin seats 211 are symmetrically arranged inside the outlet pipe 21.

[0031] like Figure 2 , Figure 4 , Figure 7 , Figure 9 , Figure 10 , Figure 11As shown, there are two sets of speed regulating mechanisms, symmetrically arranged between the outlet pipe 21 and the output pipe 221. Each set of speed regulating mechanisms corresponds to a set of pin seats 211. The speed regulating mechanism includes a blade 31 and a speed regulating component 32. The blade 31 is rotatably mounted on the pin seat 211 of the outlet pipe 21. The speed regulating component 32 is arranged between the output pipe 221 and the outlet pipe 21. The speed regulating component 32 includes a gear 321 and a rack 322. The gear 321 is rotatably mounted on the pin seat 211 and is fixedly installed with the blade 31. When the gas passes through the outlet pipe 21 and the backwash bucket 22, it impacts the blade 31, causing the blade 31 to rotate on the pin seat 211. The blade 31 drives the gear 321 to rotate. The greater the gas flow velocity, the greater the rotation angle of the blade 31 and the gear 321. The rack 322 is axially fixedly installed inside the output pipe 221, and the gear 321 meshes with the rack 322. When gear 321 rotates, it drives rack 322 to move. Rack 322 causes output pipe 221 and gas outlet pipe 21 to slide relative to each other, thereby adjusting the distance between the backwash bucket 22 and the bottom of the tower 12. As the gas flow velocity increases, the rotation angle of gear 321 increases, and the relative displacement between output pipe 221 and gas outlet pipe 21 increases. This increases the distance between backwash bucket 22 and the bottom of the tower 12, thereby reducing the velocity of the gas after impact with the bottom of the tower 12, reducing the impact on the molecular sieve, and prolonging the pulverization time of the molecular sieve.

[0032] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 As shown, the equalization mechanism is located inside the adsorption tower body 11, between the input pipe 13 and the screen 14. The equalization mechanism includes a baffle plate 41 and a bearing 42. The bearing 42 is rotatably mounted on the adsorption tower body 11, and the baffle plate 41 is fitted outside the bearing 42. The baffle plate 41 is rotatably installed inside the adsorption tower body 11. A fan blade 411 is provided below the baffle plate 41. Gas backflowing from the bottom of the tower bottom 12 towards the adsorption tower body 11 flows through the baffle plate 41. The holes on the baffle plate 41 equalize the gas distribution. With the assistance of the fan blade 411, the impact of the gas on the baffle plate 41 causes it to rotate inside the adsorption tower body 11. The bearing 42 reduces the friction coefficient between the baffle plate 41 and the adsorption tower body 11, allowing the bearing 42 to rotate smoothly inside the adsorption tower body 11, further equalizing the gas distribution. When the gas passes through the molecular sieve, it will pass through to the maximum extent evenly, improving the utilization rate of the molecular sieve.

[0033] Working principle: Gas enters the adsorption tower 11 through the input pipe 13 and then enters the outlet pipe 21 through the inlet of the input pipe 13. The downward-facing design of the inlet allows the gas to impact the elliptical bottom of the tower bottom 12 as it flows into the input pipe 13. This causes the gas to disperse in a splashing manner, facilitating the dispersion of the gas into the cross-section of the adsorption tower 11. The gas then flows from the inlet through the outlet pipe 21 to the backwash bucket 22. After impacting the bottom of the tower bottom 12, the gas flowing out of the backwash bucket 22 disperses to the edge of the adsorption tower 11. The backwash bucket 22 is designed in a funnel shape to expand the dispersion area of ​​the gas.

[0034] When the gas passes through the outlet pipe 21 and the backwash bucket 22, it impacts the blade 31, causing the blade 31 to rotate on the pin seat 211. The blade 31 drives the gear 321 to rotate. The greater the gas flow velocity, the greater the rotation angle of the blade 31 and the gear 321. When the gear 321 rotates, it drives the rack 322 to move. The rack 322 causes the output pipe 221 to slide relative to the outlet pipe 21, thereby adjusting the distance between the backwash bucket 22 and the bottom of the tower 12. As the gas flow velocity increases, the rotation angle of the gear 321 increases, and the relative displacement between the output pipe 221 and the outlet pipe 21 increases. This increases the distance between the backwash bucket 22 and the bottom of the tower 12, thereby reducing the velocity of the gas after impacting the bottom of the tower 12, reducing the impact on the molecular sieve, and prolonging the pulverization time of the molecular sieve.

[0035] Gas flowing back from the bottom of the tower 12 towards the adsorption tower 11 passes through the perforated plate 41. The perforations on the perforated plate 41 homogenize the gas distribution. With the assistance of the fan blades 411, the impact of the gas on the perforated plate 41 causes it to rotate inside the adsorption tower 11. The bearing 42 reduces the coefficient of friction between the perforated plate 41 and the adsorption tower 11, allowing the bearing 42 to rotate smoothly inside the adsorption tower 11, further homogenizing the gas distribution. When the gas passes through the molecular sieve, it will pass through to the maximum extent evenly, avoiding the situation where the gas velocity is high in the middle of the molecular sieve and low around the edges. The gas passes through the molecular sieve evenly, improving the utilization rate of the molecular sieve.

[0036] This utility model is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort shall fall within the protection scope of this utility model.

Claims

1. A backflow and backflush structure applied to a molecular sieve oxygen generator, comprising a main body mechanism and a backflush mechanism, characterized in that: The main structure includes an adsorption tower body (11) and an input pipe (13). A tower bottom (12) is fixedly installed at the bottom of the adsorption tower body (11). The input pipe (13) is fixedly installed on the tower bottom (12). A downward-facing air inlet is provided on the input pipe (13). A backflushing mechanism is provided on the air inlet. The backflushing mechanism includes an outlet pipe (21) and a backflushing bucket (22). The outlet pipe (21) is fixedly installed with the air inlet. The outlet pipe (21) is coaxial with the adsorption tower body (11). The backflushing bucket (22) is axially slidably installed below the outlet pipe (21). A speed regulating mechanism is symmetrically arranged between the outlet pipe (21) and the backwash bucket (22); the gas enters the interior of the outlet pipe (21) from the inlet of the input pipe (13), and the gas adjusts the distance between the backwash bucket (22) and the bottom of the tower (12) through the speed regulating mechanism. The gas hits the bottom of the tower (12), and the airflow rises to the interior of the adsorption tower body (11) in a splashing manner; a screen (14) is fixedly installed inside the adsorption tower body (11), and a baffle plate (41) is arranged between the screen (14) and the input pipe (13). The molecular sieve is arranged above the screen (14).

2. The backflow and backflush structure for an oxygen generator with molecular sieve as claimed in claim 1, wherein: The bottom of the tower base (12) is elliptical.

3. The backflow and backflush structure for an oxygen generator with molecular sieve as claimed in claim 1, wherein: The backflush bucket (22) is funnel-shaped, and an output pipe (221) is provided above the backflush bucket (22). The output pipe (221) is axially slidably installed below the air outlet pipe (21).

4. The backflow and backflush structure for an oxygen generator with molecular sieve as claimed in claim 1, wherein: The speed regulating mechanism includes a blade (31) and a speed regulating component (32). The blade (31) is rotatably mounted on the pin seat (211) of the air outlet pipe (21). The speed regulating component (32) is located between the output pipe (221) and the air outlet pipe (21). The gear (321) of the speed regulating component (32) is rotatably mounted on the pin seat (211). The gear (321) is fixedly mounted to the blade (31).

5. The backflush structure for oxygen backflow of a molecular sieve oxygen generator according to claim 4, characterized in that: The speed regulating component (32) also includes a rack (322), which is axially fixed inside the output pipe (221), and the gear (321) meshes with the rack (322).

6. The backflow and backflush structure for an oxygen generator with molecular sieve as claimed in claim 1, wherein: The recoil mechanism also includes a spring (23), which is disposed between the input pipe (13) and the recoil bucket (22). The spring (23) is slidably mounted on the outside of the outlet pipe (21).

7. The backflow and backflush structure for an oxygen generator with molecular sieve as claimed in claim 1, wherein: The louver plate (41) is rotatably installed inside the adsorption tower body (11), and a fan blade (411) is provided below the louver plate (41).

8. The backflow and backflush structure for an oxygen generator with molecular sieve as claimed in claim 1, wherein: A bearing (42) is provided between the sprue plate (41) and the interior of the adsorption tower body (11), and the bearing (42) is fitted on the outside of the sprue plate (41).

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