Air filtering device for liquid oxygen and liquid nitrogen production

Abstract

The utility model discloses an air filtering device for liquid oxygen and liquid nitrogen production, which comprises a bottom plate, the upper end of the bottom plate is fixedly connected with a filtering mechanism, the filtering mechanism comprises a frame body, the frame body is fixedly connected to the upper end of the bottom plate, one end of the bottom plate is fixedly connected with a motor I, and an inner cavity of the bottom plate is in threaded connection with a screw rod; the screw rod is rotationally connected with a motor I through a bottom plate, the outer side of the screw rod is in threaded connection with a moving column, an inner cavity of the bottom plate is fixedly connected with a shaft body, the outer sides of the moving column and the shaft body are in sliding connection with a moving shaft, and the top end of the moving column is fixedly connected with three filter plates which are symmetrically arranged; according to the utility model, the filter mechanism is arranged, and the filter plates can be driven by the filter mechanism to flexibly slide in the inner cavity of the frame body, so that the positions of the filter plates can be intelligently adjusted according to the air environment characteristics of a production site.

Description

Technical Field

[0001] This utility model relates to the field of liquid oxygen and liquid nitrogen production technology, specifically to an air filtration device for liquid oxygen and liquid nitrogen production. Background Technology

[0002] Liquid oxygen and liquid nitrogen production typically employs cryogenic distillation, which requires compressing and cooling air to separate it into oxygen and nitrogen. Since air contains impurities such as dust, water vapor, oil vapor, and carbon dioxide, it needs to be filtered. However, the filtration devices use a uniform filtration level, making it impossible to dynamically adjust the filtration precision according to air quality.

[0003] For example, CN218687498U discloses an air filtration device for liquid oxygen and liquid nitrogen production, including a fixed base, a processing mechanism fixedly connected to the left side of the top of the fixed base, a filter box fixedly connected to the right side of the top of the fixed base, a filter shell fixedly connected to the top of the inner cavity of the filter box, a fixing plate fixedly connected to the bottom of both sides of the inner cavity of the filter shell, a second filter plate attached to the top of the fixing plate, and a mounting base fixedly connected to the top of both sides of the inner cavity of the filter shell.

[0004] However, there are shortcomings: existing filtration devices mostly use a uniform filtration level, which cannot dynamically adjust the filtration accuracy according to air quality. For example, when the concentration of impurities such as dust and water vapor in the air is high, the fixed-level filtration structure is prone to excessive load, which can lead to a decrease in filtration efficiency or even cause filter plate blockage. Conversely, when the air quality is good, a uniform filtration level can lead to a waste of filtration resources and increase the energy consumption of equipment operation. Utility Model Content

[0005] The purpose of this invention is to provide an air filtration device for liquid oxygen and liquid nitrogen production, in order to solve the problem mentioned in the background art that the filtration device adopts a uniform filtration level and cannot dynamically adjust the filtration accuracy according to the air quality.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an air filtration device for liquid oxygen and liquid nitrogen production, comprising a base plate, a filtration mechanism fixedly connected to the upper end of the base plate, the filtration mechanism comprising a frame fixedly connected to the upper end of the base plate, a motor fixedly connected to one end of the base plate, a screw threadedly connected to the inner cavity of the base plate, the screw being rotatably connected to the motor via the base plate, a movable column threadedly connected to the outer side of the screw, a shaft fixedly connected to the inner cavity of the base plate, the outer side of the movable column and the shaft being slidably connected to the movable shaft, a filter plate fixedly connected to the top of the movable column, three filter plates symmetrically arranged, and the three symmetrically arranged filter plates being slidably connected to the inner cavity of the frame.

[0008] Furthermore, a primary screening plate is fixedly connected to one end of the frame, and the primary screening plate is fixedly connected to the upper end of the base plate. The inner cavity of the primary screening plate is provided with several rectangular grooves for screening impurities in the air.

[0009] Furthermore, a top plate is fixedly connected to the top of the frame, a second motor is fixedly connected to the top of the top plate, and a first rotating shaft is rotatably connected to the inner cavity of the top plate. The first rotating shaft is rotatably connected to the top plate and the second motor.

[0010] Furthermore, a fan blade is fixedly connected to the outer side of the rotating shaft, and a limiting post is fixedly connected to the outer side of the rotating shaft, with the limiting post fixedly connected to the bottom end of the fan blade.

[0011] Furthermore, a purification mechanism is fixedly connected to one end of the frame. The purification mechanism includes a side plate, which is fixedly connected to one end of the frame. The inner cavity of the side plate is rotatably connected to a rotating shaft II via a column. A motor III is fixedly connected to one end of the rotating shaft II.

[0012] Furthermore, a fan blade is fixedly connected to the outer side of the rotating shaft two, and a limiting post is fixedly connected to the outer side of the rotating shaft two, with the limiting post two fixedly connected to one end of the fan blade two.

[0013] Furthermore, a ventilation cavity is fixedly connected to one end of the side plate, a connecting groove is fixedly connected to the end of the ventilation cavity away from the side plate, and an air purifier is fixedly connected to the end of the connecting groove away from the ventilation cavity. An exhaust hole is provided in the inner cavity of the air purifier.

[0014] This utility model has the following beneficial effects:

[0015] I. This utility model is equipped with a filtration mechanism. Before air enters the frame, it first passes through a primary screening plate. Larger impurities are blocked by rectangular grooves and remain on the surface of the primary screening plate, while smaller particles enter the frame through the rectangular grooves and come into contact with subsequent filter plates for finer filtration. Then, after the motor starts, it drives the screw to rotate. Since the moving column is threadedly connected to the screw and slidably connected to the shaft, the rotation of the screw is converted into the left and right linear motion of the moving column, thereby driving the filter plate to slide in the inner cavity of the frame. The position of the filter plate can be adjusted according to the air environment of the production site. When the concentration of impurities in the air of the production site is high, the rotation of the motor can be controlled to move the filter plate closer to the primary screening plate, shortening the path of air from the primary screening plate to the filter plate, increasing the frequency of fine filtration of air per unit time, and enhancing the filtration effect. When the air quality of the production site is good, the filter plate is moved away from the primary screening plate, extending the air flow path in the frame. While ensuring the filtration effect, the frequency of contact between impurities in the air and the surface of the filter plate is reduced, thus reducing the frequency of cleaning and maintenance of the filter plate.

[0016] II. Based on the aforementioned beneficial effects, a purification mechanism is also provided. After motor three starts, rotating shaft two drives fan blade two to rotate, generating suction to draw the filtered air from the frame into the side plate cavity. The air is then transported to the purifier via the ventilation cavity and connecting slot. Limiting post two fixes the position of fan blade two, ensuring its smooth rotation. The air is then pushed into the ventilation cavity by fan blade two and enters the purifier through the connecting slot. The filter material inside the purifier deeply purifies the air, removing residual moisture, oil, chemical pollutants, etc. The purified air is discharged from the exhaust port and enters the subsequent liquid oxygen and liquid nitrogen production stages. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0019] Figure 2 This is a cross-sectional connection diagram of the present invention;

[0020] Figure 3 This is a cross-sectional connection diagram of the present invention.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the diagram: 1. Base plate; 2. Filtering mechanism; 21. Frame; 22. Primary screening plate; 23. Motor 1; 24. Screw; 25. Moving column; 26. Filter plate; 27. Top plate; 28. Motor 2; 29. ​​Rotating shaft 1; 210. Fan blade 1; 211. Limiting column 1; 3. Purification mechanism; 31. Side plate; 32. Rotating shaft 2; 33. Motor 3; 34. Fan blade 2; 35. Limiting column 2; 36. Ventilation chamber; 37. Connecting groove; 38. Purifier; 39. Exhaust port. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] Please see Figure 1-2 As shown, this utility model is an air filtration device for liquid oxygen and liquid nitrogen production, including a base plate 1. A filtration mechanism 2 is fixedly connected to the upper end of the base plate 1. The filtration mechanism 2 includes a frame 21, which is fixedly connected to the upper end of the base plate 1. A motor 23 is fixedly connected to one end of the base plate 1. A screw 24 is threadedly connected to the inner cavity of the base plate 1. The screw 24 is rotatably connected to the base plate 1 and the motor 23. A moving column 25 is threadedly connected to the outer side of the screw 24. A shaft is fixedly connected to the inner cavity of the base plate 1. The outer side of the moving column 25 and the shaft is slidably connected to the moving shaft. A filter plate 26 is fixedly connected to the top of the moving column 25. Three filter plates 26 are symmetrically arranged. The three symmetrically arranged filter plates 26 are slidably connected to the inner cavity of the frame 21.

[0026] Specifically, motor 23 is a servo motor with a power of 100W and a rated speed of 3000r / min. The servo motor is fixedly connected to screw 24 through a coupling. After motor 23 is powered on, the internal stator winding generates a rotating magnetic field, which drives the rotor (coaxial with screw 24) to rotate, thereby converting the rotational motion of motor 23 into the linear motion tendency of screw 24.

[0027] For example, after the motor 23 starts, it drives the screw 24 to rotate. Since the moving column 25 is threadedly connected to the screw 24 and slidably connected to the shaft, the rotation of the screw 24 is converted into the left and right linear motion of the moving column 25, thereby driving the filter plate 26 to slide in the inner cavity of the frame 21. Then, the position of the filter plate 26 is adjusted according to the air environment of the production site. When the concentration of air impurities in the production site is high, the rotation of the motor 23 can control the filter plate 26 to move closer to the primary screening plate 22, shortening the path of air from the primary screening plate 22 to the filter plate 26, increasing the frequency of air being finely filtered by the filter plate 26 per unit time, and enhancing the filtration effect. When the air quality in the production site is good, the filter plate 26 is moved away from the primary screening plate 22, extending the air flow path in the frame 21. While ensuring the filtration effect, the frequency of contact between air impurities and the surface of the filter plate 26 is reduced, and the frequency of cleaning and maintenance of the filter plate 26 is reduced.

[0028] A primary screening plate 22 is fixedly connected to one end of the frame 21. The primary screening plate 22 is fixedly connected to the upper end of the bottom plate 1. The inner cavity of the primary screening plate 22 is provided with several rectangular grooves for screening impurities in the air.

[0029] For example, before air enters the frame 21, it passes through the primary screening plate 22. Larger impurities are blocked by the rectangular groove and remain on the surface of the primary screening plate 22, while smaller particles enter the interior of the frame 21 through the rectangular groove and come into contact with the subsequent filter plate 26 for finer filtration.

[0030] A top plate 27 is fixedly connected to the top of the frame 21, and a second motor 28 is fixedly connected to the top of the top plate 27. A first rotating shaft 29 is rotatably connected to the inner cavity of the top plate 27, and the first rotating shaft 29 is rotatably connected to the top plate 27 and the second motor 28.

[0031] Specifically, motor 28 is an asynchronous motor with a power of 1.1kW, a speed of 1400r / min, and a protection rating of IP55. After motor 28 is connected to three-phase AC power, the three-phase windings (spatially distributed at 120°) in the stator core generate a rotating magnetic field through alternating current. The rotating magnetic field cuts the rotor conductors, generating induced electromotive force and current in the rotor conductors. The rotor current interacts with the rotating magnetic field to generate electromagnetic torque, driving the rotor to rotate along the direction of the rotating magnetic field. The rotor is fixedly connected to the rotating shaft 29 through the shaft extension end, driving the rotating shaft 29 to rotate synchronously. The fan blade 210 on the outside of the rotating shaft 29 rotates with the shaft, using the curved surface of the blades to push the air and generate axial airflow.

[0032] A fan blade 210 is fixedly connected to the outer side of the rotating shaft 29, and a limiting post 211 is fixedly connected to the outer side of the rotating shaft 29. The limiting post 211 is fixedly connected to the bottom end of the fan blade 210.

[0033] For example, motor 28 drives rotating shaft 29 to rotate, which in turn drives fan blade 210 to rotate, generating airflow that pushes air downwards. Limiting post 211 fixes the axial position of fan blade 210 to prevent it from shaking or shifting during rotation.

[0034] Working principle: Before air enters the frame 21, it first passes through the primary screening plate 22. Larger impurities are blocked by the rectangular grooves and remain on the surface of the primary screening plate 22, while smaller particles enter the interior of the frame 21 through the rectangular grooves, contacting the subsequent filter plate 26 for finer filtration. Then, after the motor 23 starts, it drives the screw 24 to rotate. Since the moving column 25 is threadedly connected to the screw 24 and slidably connected to the shaft, the rotation of the screw 24 is converted into the left and right linear motion of the moving column 25, thereby driving the filter plate 26 to slide within the cavity of the frame 21. The position of the filter plate 26 can then be adjusted according to the air environment of the production site. When the concentration of impurities in the air at the production site is high, the rotation of the motor 23 can control the movement of the filter plate. The filter plate 26 moves closer to the primary screening plate 22, shortening the path of air from the primary screening plate 22 to the filter plate 26. This increases the frequency of air being finely filtered by the filter plate 26 per unit time, enhancing the filtration effect. When the air quality in the production area is good, the filter plate 26 moves further away from the primary screening plate 22, extending the airflow path within the frame 21. This ensures the filtration effect while reducing the frequency of contact between impurities in the air and the surface of the filter plate 26, thus reducing the frequency of cleaning and maintenance of the filter plate 26. The filter mechanism 2 can drive the filter plate 26 to slide flexibly within the cavity of the frame 21, thereby intelligently adjusting the position of the filter plate 26 according to the air environment characteristics of the production area.

[0035] Please see Figure 1-3 As shown, this embodiment, based on the above embodiment, further includes a purification mechanism 3.

[0036] A purification mechanism 3 is fixedly connected to one end of the frame 21. The purification mechanism 3 includes a side plate 31, which is fixedly connected to one end of the frame 21. The inner cavity of the side plate 31 is rotatably connected to a rotating shaft 32 via a column. One end of the rotating shaft 32 is fixedly connected to a motor 33.

[0037] Specifically, motor 33 is an asynchronous motor with a power of 0.75kW, a speed of 1390r / min, and a protection level of IP55. After motor 33 is connected to three-phase AC power, the alternating current in the stator winding generates a rotating magnetic field in space. The rotating magnetic field cuts the rotor squirrel cage conductor, generating induced electromotive force and current. The rotor current interacts with the magnetic field to generate electromagnetic torque, driving the rotor to rotate along the direction of the magnetic field, which in turn drives the rotating shaft 2 32 and the fan blade 2 34 to rotate synchronously.

[0038] A fan blade 34 is fixedly connected to the outer side of the rotating shaft 32, and a limit post 35 is fixedly connected to the outer side of the rotating shaft 32. The limit post 35 is fixedly connected to one end of the fan blade 34.

[0039] For example, after the motor 33 is started, the rotating shaft 32 drives the fan blade 34 to rotate, generating suction to draw the filtered air in the frame 21 into the inner cavity of the side plate 31, and then delivers it to the purifier 38 through the ventilation cavity 36 and the connecting groove 37. The limiting post 35 fixes the position of the fan blade 34 to ensure its smooth rotation.

[0040] A ventilation cavity 36 is fixedly connected to one end of the side plate 31. A connecting groove 37 is fixedly connected to the end of the ventilation cavity 36 away from the side plate 31. A purifier 38 is fixedly connected to the end of the connecting groove 37 away from the ventilation cavity 36. An exhaust hole 39 is opened in the inner cavity of the purifier 38.

[0041] For example, air is pushed into the ventilation chamber 36 by the second fan blade 34, and enters the purifier 38 through the connecting groove 37. The filter material in the purifier 38 performs deep purification of the air, removing residual moisture, oil, chemical pollutants, etc. The purified air is discharged from the exhaust port 39 and enters the subsequent liquid oxygen and liquid nitrogen production process.

[0042] Working principle: After motor 33 starts, rotating shaft 2 drives fan blade 2 34 to rotate, generating suction to draw the filtered air from frame 21 into the inner cavity of side plate 31. The air is then transported to purifier 38 via ventilation cavity 36 and connecting groove 37. Limiting post 2 35 fixes the position of fan blade 2 34 to ensure smooth rotation. Air is then pushed into ventilation cavity 36 by fan blade 2 34 and enters purifier 38 through connecting groove 37. The filter material inside purifier 38 deeply purifies the air, removing residual moisture, oil, chemical pollutants, etc. The purified air is discharged from exhaust port 39 and enters the subsequent liquid oxygen and liquid nitrogen production stages.

[0043] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An air filtration device for liquid oxygen and liquid nitrogen production, characterized in that, The system includes a base plate (1), a filter mechanism (2) is fixedly connected to the upper end of the base plate (1), the filter mechanism (2) includes a frame (21), the frame (21) is fixedly connected to the upper end of the base plate (1), a motor (23) is fixedly connected to one end of the base plate (1), a screw (24) is threadedly connected to the inner cavity of the base plate (1), the screw (24) is rotatably connected to the base plate (1) and the motor (23), a moving column (25) is threadedly connected to the outer side of the screw (24), a shaft is fixedly connected to the inner cavity of the base plate (1), the outer side of the moving column (25) and the shaft is slidably connected to the moving shaft, a filter plate (26) is fixedly connected to the top of the moving column (25), three filter plates (26) are symmetrically arranged, and the three symmetrically arranged filter plates (26) are slidably connected to the inner cavity of the frame (21).

2. The air filtration device for liquid oxygen and liquid nitrogen production according to claim 1, characterized in that: One end of the frame (21) is fixedly connected to a primary screening plate (22), which is fixedly connected to the upper end of the base plate (1). The inner cavity of the primary screening plate (22) is provided with several rectangular grooves for screening impurities in the air.

3. An air filtration device for liquid oxygen and liquid nitrogen production according to claim 2, characterized in that: The top of the frame (21) is fixedly connected to a top plate (27), and the top of the top plate (27) is fixedly connected to a second motor (28). The inner cavity of the top plate (27) is rotatably connected to a first rotating shaft (29), and the first rotating shaft (29) is rotatably connected to the top plate (27) and the second motor (28).

4. An air filtration device for liquid oxygen and liquid nitrogen production according to claim 3, characterized in that: A fan blade (210) is fixedly connected to the outer side of the rotating shaft (29), and a limiting post (211) is fixedly connected to the outer side of the rotating shaft (29). The limiting post (211) is fixedly connected to the bottom end of the fan blade (210).

5. An air filtration device for liquid oxygen and liquid nitrogen production according to claim 3, characterized in that: A purification mechanism (3) is fixedly connected to one end of the frame (21). The purification mechanism (3) includes a side plate (31). The side plate (31) is fixedly connected to one end of the frame (21). The inner cavity of the side plate (31) is rotatably connected to a rotating shaft (32) via a column. One end of the rotating shaft (32) is fixedly connected to a motor (33).

6. An air filtration device for liquid oxygen and liquid nitrogen production according to claim 5, characterized in that: The outer side of the rotating shaft two (32) is fixedly connected to the fan blade two (34), and the outer side of the rotating shaft two (32) is fixedly connected to the limiting post two (35), which is fixedly connected to one end of the fan blade two (34).

7. An air filtration device for liquid oxygen and liquid nitrogen production according to claim 5, characterized in that: One end of the side plate (31) is fixedly connected to a ventilation cavity (36), and the end of the ventilation cavity (36) away from the side plate (31) is fixedly connected to a connecting groove (37). The end of the connecting groove (37) away from the ventilation cavity (36) is fixedly connected to a purifier (38), and the inner cavity of the purifier (38) is provided with an exhaust hole (39).

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