Oxygen exhaust glove box

Abstract

The utility model provides an oxygen exhaust glove box which comprises a box body and further comprises a speed adjusting assembly, one end of the speed adjusting assembly is communicated with an air inlet of the box body, the other end of the speed adjusting assembly is communicated with an inert air source, the speed adjusting assembly comprises a speed adjusting valve, and the speed adjusting valve is connected with the speed adjusting assembly. The speed regulating valve is used for regulating the flow rate of gas entering the box body; the wind meter is arranged on the box body, the wind meter is communicated with the speed regulation assembly, and the wind meter is used for detecting the flow velocity of gas entering the box body; the oxygen content analyzer is arranged on the box body, and the oxygen content analyzer is used for detecting the content of oxygen in the box body; and the digital display pressure switch is arranged on the box body, and the digital display pressure switch is used for detecting the pressure in the box body.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron permanent magnet materials technology, and in particular to an oxygen-venting glove box. Background Technology

[0002] Neodymium iron boron permanent magnet materials require strict oxygen isolation during processes such as film stripping and transfer to prevent oxidation and failure. However, traditional glove boxes use a single nitrogen replacement method, which is slow to remove oxygen. It takes more than 2 hours to reduce the oxygen content to 10ppm. Alternatively, they rely on mechanical forced circulation, which can easily cause airflow disturbances inside the box, resulting in incomplete oxygen removal and the presence of oxygen inside the box. This leads to poor yield when operating processes such as film stripping and transfer. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of slow oxygen removal and poor oxygen removal effect in the prior art, and to provide an oxygen removal glove box.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] An oxygen-exhausting glove box, the oxygen-exhausting glove box including a box body, the oxygen-exhausting glove box further including:

[0006] A speed control component, one end of which is connected to the air inlet of the housing, and the other end of which is connected to an inert gas source. The speed control component includes a speed control valve, which is used to adjust the gas flow rate entering the housing.

[0007] An anemometer is mounted on the housing and is connected to the speed control component. The anemometer is used to detect the gas flow rate entering the housing.

[0008] An oxygen content analyzer is installed on the chamber and is used to detect the oxygen content inside the chamber.

[0009] A digital pressure switch is installed on the housing and is used to detect the pressure inside the housing.

[0010] In this design, a speed control component, an anemometer, an oxygen analyzer, and a digital pressure switch are added to the chamber. The speed control valve regulates the flow rate of the inert gas entering the chamber, achieving an optimal state where the gas velocity is zero when entering from one side of the chamber to the other. At this point, the gas enters the chamber and distributes horizontally across all positions on the same horizontal plane. Due to the loss of momentum and its lower density than air, the gas flows towards the top of the chamber. Through continuous gas injection, the existing air inside the chamber is smoothly and systematically displaced. The speed control valve, in conjunction with the anemometer, monitors the gas flow rate in real time. Simultaneously, the oxygen analyzer detects the remaining oxygen content in the chamber, ensuring the inlet is closed promptly after oxygen removal. The digital pressure switch displays and monitors the pressure inside the chamber. When the pressure exceeds the switch's upper limit, the gas supply is cut off to prevent excessive pressure and ensure operational safety.

[0011] Preferably, the speed control component further includes a pressure regulating valve, which is located near the bottom of the housing, and the gas from the inert gas source enters the speed control component through the pressure regulating valve.

[0012] In this solution, the above-mentioned settings reduce the height of the pressure regulating valve, making it easier to connect to the inert gas source. At the same time, the pressure regulating valve can buffer the gas pressure of the inert gas source, preventing excessive gas pressure entering the housing from damaging the speed regulating valve.

[0013] Preferably, the speed regulating component further includes an air storage tank, one end of which is connected to the pressure regulating valve, and the other end of which is connected to the speed regulating valve.

[0014] In this scheme, the above-mentioned setup is used to temporarily store inert gas in a gas storage tank, thereby further enhancing the buffering effect on the inert gas source.

[0015] Preferably, the anemometer is located between the speed control valve and the air inlet of the housing.

[0016] In this solution, the above settings are used to prevent the anemometer from directly contacting the inert gas source before the pressure regulating valve or speed regulating valve when it is placed near the inert gas source, thus preventing damage to the anemometer.

[0017] Preferably, at least one air inlet is provided, the air inlet is arranged horizontally on the side of the housing, and the air inlet is close to the top of the housing.

[0018] In this solution, the above-mentioned settings allow the gas entering the chamber through the air inlet to flow horizontally, thereby covering the same horizontal surface of the chamber and effectively removing oxygen, thus avoiding the presence of residual oxygen in local areas.

[0019] Preferably, the housing further includes an air outlet, which is located near the bottom of the housing, and the air inlet and the air outlet are respectively located on opposite sides of the housing.

[0020] In this solution, the above-mentioned settings facilitate the rapid discharge of oxygen from the chamber.

[0021] Preferably, the oxygen-releasing glove box further includes an exhaust valve, which is located at the air outlet.

[0022] In this solution, the above settings are used to exhaust oxygen from the chamber and then seal the outlet through the exhaust valve.

[0023] Preferably, the oxygen exhaust glove box further includes a control component, which is disposed on the box body. The speed control valve, the anemometer, the oxygen content analyzer, the digital pressure switch, the pressure regulating valve, and the exhaust valve are all electrically connected to the control component.

[0024] In this solution, the above settings enable automatic oxygen removal without human intervention, resulting in a higher level of integration.

[0025] Preferably, the housing is also provided with a viewing window, and below the viewing window is an operation window channel, in which an operation glove is placed to be inserted into the housing.

[0026] In this solution, the above-mentioned settings facilitate processes such as stripping the NdFeB permanent magnet material inside the operating chamber.

[0027] Preferably, the bottom of the box is provided with a support, and the four corners of the support are provided with wheels. The box and the support are detachably connected.

[0028] In this solution, the above-mentioned setup effectively supports the container while enabling its transport via wheels.

[0029] The significant advantages of this invention are as follows: By adding a speed control component, an anemometer, an oxygen analyzer, and a digital pressure switch to the chamber, the flow rate of the inert gas entering the chamber is adjusted using a speed control valve. The speed control valve can adjust the gas flow rate to an optimal state where the velocity is zero when entering from one side of the chamber to the other. At this point, the gas enters the chamber and distributes horizontally across all positions on the same horizontal plane. Due to the loss of momentum and its lower density than air, the gas flows towards the top of the chamber. Through continuous gas injection, the original air inside the chamber is smoothly and orderly replaced. The speed control valve, in conjunction with the anemometer, monitors the gas flow rate in real time. Simultaneously, the oxygen analyzer detects the remaining oxygen content in the chamber to ensure timely closure of the air inlet after oxygen removal. The digital pressure switch detects the pressure inside the chamber, monitoring the pressure even when the gas flow rate is increased by the speed control valve, preventing excessive pressure and ensuring safe operation. Attached Figure Description

[0030] Figure 1 This is a perspective view of an oxygen-exhausting glove box according to a preferred embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] Box 1

[0033] Air intake 11

[0034] Air outlet 12

[0035] Speed ​​control component 2

[0036] Speed ​​control valve 21

[0037] Pressure regulating valve 22

[0038] Gas storage tank 23

[0039] Anemometer 3

[0040] Oxygen content analyzer 4

[0041] Digital pressure switch 5

[0042] Exhaust valve 6

[0043] Control Component 7

[0044] Perspective Window 8

[0045] Operation window channel 9

[0046] Bracket 10

[0047] 101 Walking Wheels Detailed Implementation

[0048] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0049] This embodiment provides an oxygen-venting glove box, the specific structure of which is as follows: Figure 1 As shown, the oxygen exhaust glove box includes a box body 1, and the oxygen exhaust glove box also includes:

[0050] Speed ​​control component 2, one end of which is connected to the air inlet 11 of the housing 1, and the other end of which is connected to an inert gas source (not shown in the figure). Speed ​​control component 2 includes a speed control valve 21, which is used to adjust the gas flow rate entering the housing 1.

[0051] An anemometer 3 is installed on the housing 1. The anemometer 3 is connected to the speed control component 2 and is used to detect the gas flow rate entering the housing 1.

[0052] Oxygen content analyzer 4 is installed on the chamber 1 and is used to detect the oxygen content in the chamber 1.

[0053] Digital pressure switch 5 is installed on the housing 1 and is used to detect the pressure inside the housing 1.

[0054] Specifically, the housing 1 is a sealed structure with an internal cavity. An air inlet 11 is provided on the housing 1. The speed control valve 21, an anemometer 3, an oxygen analyzer 4, and a digital pressure switch 5 are all located on the top of the housing 1. The detection ends of the oxygen analyzer 4 and the digital pressure switch 5 extend into the housing 1. The oxygen analyzer 4 has a range of 0-1000ppm, a feedback signal detection accuracy of ±5ppm, and an oxygen content fluctuation within the housing 1 of <5ppm / h. The speed control valve 21, anemometer 3, oxygen analyzer 4, and digital pressure switch 5 are all existing structures in the prior art, and this embodiment does not improve upon them; therefore, they will not be described in detail here. The speed control valve 21 increases the gas flow rate entering the chamber 1 by adjusting its opening. In this embodiment, the inert gas is nitrogen. In actual operation, the nitrogen velocity at the inlet 11 needs to be calculated based on the dimensions of the chamber 1. To improve oxygen removal efficiency, the nitrogen velocity needs to be increased, as a faster nitrogen filling speed results in faster oxygen removal. The nitrogen velocity mainly depends on the effective impact distance of the nitrogen gas; ideally, the nitrogen should enter from one side of the chamber 1 to the other, with a velocity of zero. At this point, the nitrogen loses its impact force and, being less dense than air, flows towards the top of the chamber 1. Through continuous nitrogen filling, the existing air inside the chamber 1 can be smoothly and orderly replaced. This air replacement is oxygen removal. Therefore, the speed control valve 21 is used to ensure the nitrogen entering the chamber 1 reaches its optimal state, expediting oxygen removal, improving oxygen removal efficiency, reducing nitrogen waste, and providing certain economic benefits.

[0055] Furthermore, in this embodiment, the speed control valve 21 works in conjunction with the anemometer 3 to monitor the gas flow rate entering the chamber 1 in real time and dynamically adjust the nitrogen flow rate within the range of 0-300 L / min. Simultaneously, the oxygen content analyzer 4 detects the remaining oxygen content in the chamber 1 to ensure that the inlet 11 is closed promptly after oxygen venting. A digital pressure switch 5 is used to detect the pressure inside the chamber 1, monitoring the pressure inside the chamber 1 when the gas flow rate entering the chamber 1 is increased via the speed control valve 21, preventing excessive pressure in the chamber 1 and ensuring operational safety. The failure rate of the oxygen venting glove box is reduced to <1 time / year, and maintenance costs are reduced by 40%.

[0056] Compared to traditional oxygen-venting glove boxes, the oxygen venting rate is increased by 220%, and the time required to reduce the oxygen content from 21% to 10ppm is reduced from 80 minutes to less than or equal to 25 minutes. This makes it suitable for high-frequency material transfer, meaning it can complete 4-5 filling and venting cycles per hour. Nitrogen consumption is reduced by 66%, and the nitrogen consumption per oxygen venting cycle is reduced from 90m³ to less than or equal to 30m³. Based on an industrial nitrogen price of 6 yuan / m³, a single oxygen-venting glove box can save approximately 120,000 yuan in nitrogen costs annually. Simultaneously, the oxidation weight loss rate of NdFeB materials is reduced from 0.15% to below 0.03%.

[0057] In this embodiment, the speed control component 2 also includes a pressure regulating valve 22, which is located near the bottom of the housing 1. The gas from the inert gas source enters the speed control component 2 through the pressure regulating valve 22.

[0058] Specifically, the speed regulating valve 21 and the air inlet 11 are connected via a pipeline (not shown in the figure), and the pressure regulating valve 22 is connected to the speed regulating valve 21 via a pipeline. The pressure regulating valve 22 is located at the bottom of the housing 1 to facilitate connection with the inert gas source by reducing the height of the pressure regulating valve 22. Nitrogen from the inert gas source flows through the pressure regulating valve 22, sequentially through the speed regulating valve 21 and the anemometer 3, and then into the air inlet 11. The pressure regulating valve 22 is a valve body structure used in the prior art for regulating fluid pressure. At the same time, the pressure regulating valve 22 can buffer the gas pressure of the inert gas source to prevent excessive gas pressure entering the housing 1 from damaging the speed regulating valve 21. It can be understood that the speed regulating valve 21 and the pressure regulating valve 22 work together to regulate the flow rate and pressure of nitrogen, thereby allowing nitrogen to enter the housing 1 at an optimal flow rate. Taking advantage of the fact that nitrogen has a lower density (1.25 kg / m³) than air (1.29 kg / m³), a laminar displacement airflow is formed from top to bottom within the chamber 1 to effectively remove oxygen and avoid residual oxygen in areas where nitrogen is not filled.

[0059] Furthermore, the speed control assembly 2 also includes an air storage tank 23, one end of which is connected to the pressure regulating valve 22, and the other end of which is connected to the speed control valve 21.

[0060] Specifically, the gas storage tank 23 is installed on the housing 1. The gas storage tank 23 is located between the pressure regulating valve 22 and the speed regulating valve 21 and is connected to each other through pipelines. When nitrogen flows into the housing 1 through the pressure regulating valve 22, the gas pressure is first regulated by the pressure regulating valve 22. Then, the nitrogen is temporarily stored in the gas storage tank 23 to further buffer the nitrogen. Therefore, when nitrogen is injected into the housing 1, the nitrogen buffering effect is further improved compared to setting the pressure regulating valve 22 alone.

[0061] In this embodiment, the anemometer 3 is located between the speed control valve 21 and the air inlet 11 of the housing 1.

[0062] Specifically, the anemometer 3 is located between the speed control valve 21 and the air inlet 11 of the housing 1. Compared to locations between the pressure regulating valve 22 and the speed regulating valve 21, or between the pressure regulating valve 22 and the gas storage tank 23, the anemometer 3 is positioned in the pipeline after the nitrogen gas has been buffered. This prevents the anemometer 3 from directly contacting the inert gas source before the pressure regulating valve 22 or the speed regulating valve 21 when it is placed near the inert gas source, thus preventing damage to the anemometer 3. In this embodiment, the anemometer 3 monitors the wind speed inside the housing 1 in real time with an accuracy of ±0.1 m / s.

[0063] In this embodiment, at least one air inlet 11 is provided. The air inlet 11 is arranged horizontally on the side of the housing 1 and is close to the top of the housing 1.

[0064] Specifically, the description uses four air inlets 11, but this is not a limitation. The four air inlets 11 are arranged horizontally on the side of the housing 1, with adjacent air inlets 11 spaced apart. The gas entering the housing 1 through the four air inlets 11 can flow horizontally, thus covering the same horizontal plane of the housing 1. This forms a laminar displacement airflow from top to bottom within the housing 1, effectively removing oxygen and preventing residual oxygen in localized areas.

[0065] In this embodiment, the volume of box 1 is 6m³. 3 Taking this example, by setting the speed control component 2, when the gas flow rate is 8m / s when it passes through the four air inlets 11 and is being filled into the box 1, the flow field inside the box 1 is relatively stable and the oxygen removal efficiency is the highest.

[0066] In this embodiment, the housing 1 also includes an air outlet 12, which is located near the bottom of the housing 1, and the air inlet 11 and the air outlet 12 are respectively located on opposite sides of the housing 1.

[0067] Specifically, the air inlet 11 is located near the top of the housing 1 and on the side of the housing 1, and the air outlet 12 is also located on the side of the housing 1 and near the bottom of the housing 1. The air inlet 11 and the air outlet 12 are located on opposite sides of the housing 1. Compared with the two sides of the housing 1 where the air inlet 11 and the air outlet 12 are on the same side, the air inlet 11 and the air outlet 12 located on opposite sides can reduce the path of oxygen discharge, so as to facilitate the rapid discharge of oxygen from the housing 1.

[0068] In this embodiment, the oxygen-releasing glove box also includes an exhaust valve 6, which is located at the air outlet 12. The exhaust valve 6 is a valve body in the prior art. By setting the exhaust valve 6, the oxygen in the box 1 is discharged and then the air outlet 12 is closed by the exhaust valve 6.

[0069] In this embodiment, the oxygen exhaust glove box also includes a control component 7, which is disposed on the box body 1. The speed control valve 21, the anemometer 3, the oxygen content analyzer 4, the digital pressure switch 5, the pressure regulating valve 22, and the exhaust valve 6 are all electrically connected to the control component 7.

[0070] Specifically, control component 7 is a PLC controller as in the prior art. Control component 7 is located on the top of housing 1. Speed ​​control valve 21, anemometer 3, oxygen analyzer 4, digital pressure switch 5, pressure regulating valve 22, and exhaust valve 6 are all electrically connected to the PLC controller. For example, the opening degrees of speed control valve 21 and pressure regulating valve 22 are automatically adjusted by the PLC controller. The wind speed monitored by anemometer 3, the oxygen content measured by oxygen analyzer 4, and the pressure of housing 1 detected by digital pressure switch 5 are all fed back to the PLC controller, realizing data acquisition, storage, and remote monitoring. Automatic oxygen venting is achieved without manual operation, resulting in higher integration. During oxygen venting, a slight positive pressure of 50-200 Pa is maintained inside housing 1. Furthermore, in abnormal operating conditions where the oxygen content suddenly increases by >20 ppm, the oxygen venting glove box can initiate an emergency nitrogen replenishment program within 3 seconds to improve response speed.

[0071] It should be noted that the PLC controller in this embodiment, as well as the PLC controller opening or closing speed control valve 21, anemometer 3, oxygen content analyzer 4, digital display pressure switch 5, pressure regulating valve 22, and exhaust valve 6, are all functions of the existing PLC controller, and this embodiment has not improved them.

[0072] In this embodiment, a viewing window 8 is also provided on the housing 1, and an operation window channel 9 is provided below the viewing window 8. An operation glove (not shown in the figure) is provided inside the operation window channel 9 to extend into the housing 1.

[0073] Specifically, the viewing window 8 is a transparent acrylic sheet material as in the prior art, and multiple viewing windows 8 are provided. These multiple viewing windows 8 are arranged along the length of the housing 1 and located on the side wall near the top of the housing 1. Multiple operation window channels 9 are cylindrical channels located below the viewing windows 8. An operation glove, made of rubber, is installed inside the operation window channel 9 and is sealed to the operation window channel 9 to prevent gas from escaping. The viewing windows 8 and operation gloves facilitate processes such as peeling off the NdFeB permanent magnet material inside the housing 1.

[0074] In this embodiment, a support 10 is provided at the bottom of the box 1, and a walking wheel 101 is provided at the four corners of the support 10. The box 1 and the support 10 are detachably connected.

[0075] Specifically, the traveling wheels 101 are located at the bottom of the support 10, and the bottom of the housing 1 is embedded in the support 10. The housing 1 can be connected to the support 10 via bolt assemblies. Of course, in other embodiments, it can also be connected to the support 10 via a snap-fit ​​structure as in the prior art. While the support 10 effectively supports the housing 1, the traveling wheels 101 facilitate the transfer of the housing 1. It is understood that the housing 1 can seamlessly interface with existing automated equipment such as robotic arms and conveyor belts, with a response delay of <0.5 seconds. Alternatively, the housing can be transferred to a magnetic material production line via the traveling wheels 101, which is prior art and will not be elaborated further here.

[0076] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. An oxygen-exhausting glove box, the oxygen-exhausting glove box comprising a box body, characterized in that, The oxygen-exhausting glove box also includes: A speed control component, one end of which is connected to the air inlet of the housing, and the other end of which is connected to an inert gas source, the speed control component including a speed control valve, the speed control valve being used to adjust the gas flow rate entering the housing; An anemometer is mounted on the housing and is connected to the speed control component. The anemometer is used to detect the gas flow rate entering the housing. An oxygen content analyzer is installed on the chamber and is used to detect the oxygen content inside the chamber. A digital pressure switch is installed on the housing and is used to detect the pressure inside the housing.

2. The oxygen-exhausting glove box as described in claim 1, characterized in that, The speed control component also includes a pressure regulating valve, which is located near the bottom of the housing, and the gas from the inert gas source enters the speed control component through the pressure regulating valve.

3. The oxygen removal glove box of claim 2, wherein, The speed control assembly also includes an air storage tank, one end of which is connected to the pressure regulating valve, and the other end of which is connected to the speed control valve.

4. The oxygen-exhausting glove box as described in claim 3, characterized in that, The anemometer is located between the speed control valve and the air inlet of the housing.

5. The oxygen-exhausting glove box as described in claim 4, characterized in that, The air inlet is provided at least one, and the air inlet is arranged horizontally on the side of the box body, and the air inlet is close to the top of the box body.

6. The oxygen removal glove box of claim 5, wherein, The enclosure also includes an air outlet, which is located near the bottom of the enclosure, while the air inlet and the air outlet are located on opposite sides of the enclosure.

7. The oxygen removal glove box of claim 6, wherein, The oxygen-releasing glove box also includes an exhaust valve, which is located at the air outlet.

8. The oxygen removal glove box of claim 7, wherein, The oxygen exhaust glove box also includes a control component, which is mounted on the box body. The speed control valve, the anemometer, the oxygen content analyzer, the digital pressure switch, the pressure regulating valve, and the exhaust valve are all electrically connected to the control component.

9. The oxygen removal glove box of claim 1, wherein, The enclosure is also provided with a viewing window, and below the viewing window is an operation window channel, in which an operation glove is placed to be inserted into the enclosure.

10. The oxygen-exhausting glove box as described in claim 1, characterized in that, The bottom of the box is equipped with a support frame, and the four corners of the support frame are equipped with wheels. The box and the support frame are detachably connected.

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