Nitrogen generator

Abstract

The invention relates to the technical field of nitrogen preparation, in particular to a nitrogen generator which comprises a shell, a first partition plate is fixedly connected to the interior of the shell, a second partition plate is fixedly connected to the interior of a working chamber, and a gas storage tank is fixedly connected to the upper end of the first partition plate; the oil-water filter, the particle filter and the carbon adsorption filter are connected through pipelines, the outer wall of a first air inlet pipe is fixedly sleeved with a first stop valve, the outer wall of a first air outlet pipe is fixedly sleeved with a second stop valve, and the side, away from the air storage tank, of the upper end of a first partition plate is fixedly connected with a diaphragm pump. The air storage tank is additionally arranged between the filtering device and the nitrogen separation device, so that when the filter element is replaced, clean air supply can be continuously provided for the subsequent nitrogen separation device through the air storage tank, continuous generation of nitrogen is guaranteed while the filter element is replaced, and the nitrogen separation efficiency is improved. And the maintenance convenience and the operation continuity of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of nitrogen preparation, and in particular to a nitrogen generator. Background Technology

[0002] Nitrogen, as an inert gas, is widely used in electronics manufacturing, food preservation, chemical reactions, and laboratory analysis. Traditionally, nitrogen is mainly obtained through bottled nitrogen. However, bottled nitrogen has problems such as inconvenient transportation and storage, poor gas supply continuity, and increasing costs with increasing usage. As various industries have higher requirements for nitrogen purity, gas production efficiency, and equipment portability, small and medium-sized nitrogen generators have gradually become the mainstream alternative. Among them, membrane nitrogen generators are widely used due to their relatively simple structure, stable operation, and convenient maintenance.

[0003] However, after the nitrogen generator has been used for a period of time, the air filter element needs to be replaced. When replacing it, the equipment needs to be shut down. For applications with high demand for continuous nitrogen supply, shutting down to replace the filter element will directly interrupt the nitrogen supply, causing the process to stop. When the equipment is restarted after shutdown, the air intake device, filter device, and nitrogen membrane separator need to re-establish pressure balance and operating status. In the initial restart, gas flow and pressure are prone to fluctuations, resulting in unstable nitrogen purity. It takes a period of adjustment to restore it to the normal operating standard, which in turn delays the experimental progress or production cycle. Summary of the Invention

[0004] 1. Technical problems to be solved The purpose of this application is to provide a nitrogen generator to solve the problem that after a period of use, the air filter element of the nitrogen generator needs to be replaced. When replacing the filter element, the equipment needs to be shut down. For applications with high demand for continuous nitrogen supply, shutting down to replace the filter element will directly interrupt the nitrogen supply, causing the process to stop. When the equipment is restarted after shutdown, the air intake device, filter device, and nitrogen membrane separation device need to re-establish pressure balance and operating status. In the initial restart, the gas flow and pressure are prone to fluctuation, resulting in unstable nitrogen purity. It takes a period of adjustment to restore it to the normal operating standard, which in turn delays the experimental progress or production cycle.

[0005] The nitrogen generator provided in this application adopts the following technical solution: it includes a shell, a first partition is fixedly connected inside the shell, the shell is divided into an extraction chamber and a working chamber by the first partition, a second partition is fixedly connected inside the working chamber, a gas storage tank is fixedly connected to the upper end of the first partition, a plurality of mounting brackets arranged in a rectangular array are fixedly connected to the upper end of one side of the second partition, an oil-water filter, a particulate filter and a carbon adsorption filter are fixedly connected to each of the plurality of mounting brackets in groups of four, a bottom shell is threaded to the bottom end of each of the oil-water filter, the particulate filter and the carbon adsorption filter are connected to each other by pipes, a first air inlet pipe is fixedly connected to the input end of the oil-water filter, a first shut-off valve is fixedly sleeved on the outer wall of the first air inlet pipe, a first connecting pipe is fixedly connected to the end of the first air inlet pipe away from the input end of the oil-water filter, a first air outlet pipe is fixedly connected to the output end of the carbon adsorption filter, a second shut-off valve is fixedly sleeved on the outer wall of the first air outlet pipe, a second connecting pipe is fixedly connected to the end of the first air outlet pipe away from the output end of the carbon adsorption filter; The gas storage tank is fixedly connected to a first one-way valve at its input end, and to a second one-way valve at its output end. The output end of the second one-way valve is fixedly connected to a third connecting pipe. A diaphragm pump is fixedly connected to the upper side of the first partition away from the gas storage tank. The end of the third connecting pipe away from the second one-way valve passes through the second partition and is fixedly connected to the input end of the diaphragm pump.

[0006] By adopting the above technical solution, the internal space of the outer shell is divided into an extraction chamber and a working chamber by the first partition, making the internal layout of the equipment more reasonable and the functional areas of each part clear. The second partition inside the working chamber further optimizes space utilization and provides installation positions. The air storage tank is fixed on the first partition and can pre-store a certain amount of filtered air to provide a stable air source for the subsequent nitrogen separation device. The mounting bracket provides a stable installation position for the oil-water filter, particulate filter, and carbon adsorption filter, which are connected in series through pipelines to purify the incoming air step by step, removing oil, particulate impurities, and water vapor, and then delivering it into the air storage tank. When the filter element needs to be replaced, the oil-water filter, particulate filter, and carbon adsorption filter are closed by closing the first and second shut-off valves. The adsorption filter is disconnected from the subsequent process. The bottom shell, which is threaded to the filter, is rotated and removed, and the internal filter element is replaced. At this time, the clean air stored in the gas storage tank can continuously supply gas to the subsequent nitrogen separation unit, achieving continuous nitrogen supply while replacing the filter element without shutting down the system. The diaphragm pump provides power for the delivery of clean air, ensuring the stability of gas delivery to the subsequent nitrogen separation unit and reducing fluctuations in nitrogen pressure and purity. By adding a gas storage tank between the filtration unit and the nitrogen separation unit, this device can continuously supply clean air to the subsequent nitrogen separation unit while the filter element is being replaced, ensuring continuous nitrogen production while the filter element is being replaced, thereby improving the maintenance convenience and operational continuity of the equipment.

[0007] Preferably, the output end of the diaphragm pump is fixedly connected to a fourth connecting pipe, and the end of the fourth connecting pipe away from the diaphragm pump is fixedly connected to the input end of the nitrogen membrane. Two fixed rings arranged in a mirror image are fixedly connected to the upper end of the side of the second partition away from the mounting frame. A nitrogen membrane is fixedly connected inside the two fixed rings. An exhaust pipe is fixedly connected to the exhaust end of the nitrogen membrane. A collection box is fixedly connected to the upper side of the first partition, and the exhaust end of the exhaust pipe away from the nitrogen membrane is fixedly connected to the collection box.

[0008] By adopting the above technical solution, the output end of the diaphragm pump is connected to the fourth connecting pipe, and the gas that has been pre-filtered and pre-stored in the gas storage tank is stably delivered to the input end of the nitrogen membrane, providing a continuous gas source for the nitrogen separation process. The two mirror-distributed fixing rings fixed on the second diaphragm can fix the nitrogen membrane, ensuring its stability during operation and preventing the nitrogen membrane from shifting due to gas flow or equipment vibration, which would affect the separation effect. After the nitrogen membrane completes nitrogen separation, the waste gas it produces is transported to the collection box through the waste gas pipe. The collection box collects these waste gases for use in laboratories or other closed environments, preventing the direct emission of waste gas from causing environmental impact.

[0009] Preferably, a first nitrogen tube is fixedly connected to the output end of the nitrogen membrane, a nitrogen concentration meter is fixedly connected to the surface of the outer shell, the end of the first nitrogen tube away from the output end of the nitrogen membrane is fixedly connected to the inlet end of the nitrogen concentration meter, a second nitrogen tube is fixedly connected to the output end of the nitrogen concentration meter, a regulating valve, a flow meter and a nitrogen pressure gauge are respectively sleeved on the outer wall of the second nitrogen tube, a nitrogen outlet is fixedly connected to the end of the second nitrogen tube that passes through the outer shell, and the regulating valve, flow meter and nitrogen pressure gauge are all installed through the surface of the outer shell.

[0010] By adopting the above technical solution, the nitrogen gas separated by connecting the output end of the nitrogen membrane to the first nitrogen tube is smoothly exported and delivered to the nitrogen concentration meter on the surface of the outer shell. The nitrogen concentration meter can detect the concentration of the exported nitrogen in real time, allowing staff to promptly grasp the nitrogen quality. The output end of the nitrogen concentration meter is connected to the second nitrogen tube, enabling the detected nitrogen to be continuously delivered to subsequent pipelines. The regulating valve, flow meter, and nitrogen pressure gauge fitted on the outer wall of the second nitrogen tube all pass through the surface of the outer shell. Staff can flexibly control the nitrogen delivery volume through the regulating valve and intuitively understand the flow and pressure status of the nitrogen with the help of the flow meter and nitrogen pressure gauge, ensuring that the nitrogen delivery meets the usage requirements. One end of the second nitrogen tube that passes through the outer shell is connected to the nitrogen outlet for stable nitrogen output, facilitating real-time monitoring of the nitrogen output concentration and adjustment of the output pressure and flow rate, thus improving the convenience and reliability of the equipment.

[0011] Preferably, an air compressor is fixedly connected to the bottom of the air extraction chamber, an air delivery pipe is fixedly connected to the output end of the air compressor, a T-junction is fixedly connected to the end of the air delivery pipe away from the air compressor, and an air pressure gauge is fixedly connected to the end of the T-junction away from the air delivery pipe, with the air pressure gauge penetrating the surface of the outer casing.

[0012] By adopting the above technical solution, an air compressor is fixed at the bottom of the extraction chamber to provide an air source for the entire nitrogen generator. When the air compressor is working, it can continuously draw in and compress air. The output end of the air compressor is connected to an air delivery pipe, which stably delivers the compressed air to a three-way pipe. The three-way pipe plays the role of diversion and transfer, ensuring that the air can be smoothly guided to subsequent stages. The end of the three-way pipe away from the air delivery pipe is connected to an air pressure gauge, which is installed through the surface of the outer shell. The operator can directly and intuitively view the pressure status of the compressed air through the air pressure gauge on the outer shell, and keep abreast of the air supply status, providing a reliable air source guarantee for subsequent gas filtration, nitrogen separation and other processes.

[0013] Preferably, the end of the first connecting pipe away from the first air intake pipe passes through the second partition and is fixedly connected to the three-way pipe.

[0014] By adopting the above technical solution, the end of the first connecting pipe away from the first air intake pipe passes through the second partition and is fixedly connected to the three-way pipe. The compressed air generated by the air compressor enters the three-way pipe through the air delivery pipe, then enters the first connecting pipe. The first connecting pipe delivers the compressed air to the first air intake pipe, and then enters the filtration device composed of the oil-water filter, the particulate filter and the carbon adsorption filter through the first air intake pipe.

[0015] Preferably, a rotor pump is fixedly connected to one side of the upper end of the first partition, the input end of the rotor pump is fixedly connected to the collection box, and the output end of the rotor pump passes through the outer shell and is fixedly connected to an exhaust gas outlet.

[0016] By adopting the above technical solution, a rotor pump is fixed on one side of the upper part of the first partition plate. The rotor pump is used to extract the waste gas generated during the nitrogen separation process. The input end of the rotor pump is connected to the waste gas box, and the output end passes through the waste gas outlet connected to the outer shell to discharge the collected waste gas to the outside of the equipment. This allows the treatment of waste gas to be more concentrated, keeps the internal environment of the equipment clean, and prevents excessive waste gas from affecting the operation of the equipment.

[0017] Preferably, an exhaust switch and a power switch are fixedly connected to the bottom of the outer casing surface. The exhaust switch is electrically connected to the rotor pump, and the power switch is electrically connected to the diaphragm pump and the air compressor, respectively. By adopting the above technical solution, and fixing the exhaust switch and power switch at the bottom of the outer casing, the operator can more conveniently operate the equipment and discharge exhaust gas. The exhaust switch is electrically connected to the rotor pump. Opening the exhaust switch controls the rotor pump to start and discharge the exhaust gas inside the equipment. The power switch is electrically connected to the diaphragm pump and the air compressor respectively. Operating the power switch can directly control the start and stop of the diaphragm pump and the air compressor, allowing the operator to flexibly adjust the operating status of the equipment.

[0018] Preferably, an inspection port is provided on the upper end of one side of the outer casing, and four threaded holes arranged in a rectangular array are provided on one side of the outer casing. A cover plate is slidably disposed inside the inspection port, and an installation hole is provided through the cover plate. Fixing bolts are slidably disposed inside the four installation holes, and one end of the four fixing bolts is threadedly connected to the threaded hole through the installation hole.

[0019] By adopting the above technical solution, an inspection port is opened at the upper end of one side of the outer casing, and a cover plate is slidably installed inside the inspection port, providing a convenient passage for the inspection and maintenance of the oil-water filter, particulate filter, and carbon adsorption filter inside the equipment. The mounting holes that are opened through the cover plate correspond to the threaded holes arranged in a rectangular array on one side of the outer casing. When maintenance is required, the cover plate can be easily removed by simply taking out the fixing bolts from the mounting holes and threaded holes, exposing the structure of the oil-water filter, particulate filter, and carbon adsorption filter, which is convenient for staff to inspect or replace the filter elements. After maintenance is completed, the cover plate is reset, and the fixing bolts are threaded through the mounting holes and threaded holes to firmly fix the cover plate, ensuring the sealing and safety of the equipment.

[0020] Preferably, multiple air inlet slots arranged in a linear array are provided on both sides of the air extraction chamber.

[0021] By adopting the above technical solution, multiple air intake slots arranged in a straight array on both sides of the air extraction chamber allow external air to enter the chamber more smoothly, enabling the air compressor to continuously extract and compress air, providing a stable air source for subsequent gas filtration and nitrogen separation processes, thereby improving the air intake efficiency and operational stability of the equipment.

[0022] Preferably, the end of the second connecting pipe away from the first outlet pipe is fixedly connected to the input end of the first one-way valve, and the end of the third connecting pipe away from the second one-way valve passes through the second partition and is fixedly connected to the input end of the diaphragm pump.

[0023] By adopting the above technical solution, the end of the second connecting pipe furthest from the first outlet pipe is fixedly connected to the input end of the first one-way valve, allowing the filtered gas to enter the first one-way valve along the pipeline. The one-way conduction characteristic of the first one-way valve prevents gas backflow. Simultaneously, the end of the third connecting pipe furthest from the second one-way valve passes through the second partition and is fixedly connected to the input end of the diaphragm pump, allowing the gas pre-stored in the gas tank to be drawn by the diaphragm pump through the second one-way valve and the third connecting pipe. The diaphragm pump provides power for gas delivery, propelling the gas into the subsequent nitrogen separation stage. This ensures the stability of the gas flow direction, prevents gas backflow, and allows the treated gas to continuously and stably enter the next process, ensuring the continuity of the nitrogen generation process.

[0024] 2. Beneficial effects In summary, this application includes at least one of the following beneficial technical effects: 1. This invention provides a nitrogen generator that enables filter replacement without shutting down the system by setting up a gas storage tank, a first shut-off valve, and a second shut-off valve. Air is purified through a series of stages—an oil-water filter, a particulate filter, and a carbon adsorption filter—before being delivered to the gas storage tank. The tank stores a portion of the filtered clean air for use during filter replacement. When filter replacement is needed, the first and second shut-off valves are closed, disconnecting the filtration system (combined with the oil-water filter, particulate filter, and carbon adsorption filter) from subsequent processes. The pre-stored clean air in the gas storage tank continuously supplies gas to the nitrogen separation device. Operators can expose and replace the internal filter elements by rotating the bottom shells of the oil-water filter, particulate filter, and carbon adsorption filter, completing the filter replacement without stopping the system. This ensures a continuous nitrogen supply, avoids production or experimental interruptions due to maintenance shutdowns, and enhances the continuity of equipment operation.

[0025] 2. This invention provides a nitrogen generator that, through the configuration of a gas storage tank and a diaphragm pump, avoids the problem of gas state fluctuations caused by internal pressure imbalance after filter replacement. During filter replacement, the gas storage tank continuously supplies clean air to the subsequent devices, and the diaphragm pump stably delivers clean air into the nitrogen membrane, maintaining stable pressure within the nitrogen membrane and ensuring the nitrogen separation device is always in normal operating condition. After replacement, the first and second shut-off valves are opened, and the filtered air first enters the gas storage tank. Since the filtered air does not directly enter the nitrogen membrane, and the gas inside the nitrogen membrane is supplied by the diaphragm pump, the two do not interfere with each other. This eliminates the need for additional adjustments, ensuring stable nitrogen purity and effectively preventing pressure fluctuations from affecting the generated nitrogen concentration.

[0026] 3. This invention provides a nitrogen generator. The interior of the outer casing is divided into an extraction chamber and a working chamber by a first and second partition. The clear division of functional areas allows for accurate location of the corresponding functional devices during maintenance, improving the efficiency of equipment repair and maintenance. The air inlet slots on both sides of the extraction chamber ensure smooth airflow, providing a sufficient air source for the air compressor. The inspection port on the outer casing, combined with a removable cover, facilitates quick maintenance of the oil-water filter, particulate filter, and carbon adsorption filter. The fitting of the fixing bolts and threaded holes ensures the cover's sealing performance and simplifies the disassembly and assembly process, thereby improving the efficiency of equipment maintenance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the filtration device structure of the present invention; Figure 3This is a schematic diagram of the nitrogen separation device of the present invention; Figure 4 This is a schematic diagram of the internal pipeline connection structure of the present invention; Figure 5 This is a schematic diagram of the cover plate mounting structure of the present invention; Figure 6 This is a schematic diagram of the air compressor structure of the present invention; Figure 7 This is a schematic diagram of the connection structure of the rotor pump and diaphragm pump of the present invention.

[0028] The components include: 1. Outer shell; 2. First partition; 3. Extraction chamber; 4. Working chamber; 5. Second partition; 6. Air storage tank; 7. Mounting bracket; 8. Oil-water filter; 9. Particulate filter; 10. Carbon adsorption filter; 11. Bottom shell; 12. First inlet pipe; 13. First shut-off valve; 14. First connecting pipe; 15. First outlet pipe; 16. Second shut-off valve; 17. Second connecting pipe; 18. First check valve; 19. Second check valve; 20. Third connecting pipe; 21. Diaphragm pump; 22. Fourth connecting pipe; 23. Retaining ring; 24. 25. Nitrogen membrane; 26. Exhaust gas pipe; 27. Collection box; 28. First nitrogen pipe; 29. ​​Nitrogen concentration meter; 30. Second nitrogen pipe; 31. Regulating valve; 32. Flow meter; 33. Nitrogen pressure gauge; 34. Nitrogen outlet; 35. Air compressor; 36. Air delivery pipe; 37. T-connector; 38. Air pressure gauge; 39. Exhaust switch; 40. Power switch; 41. Rotary pump; 42. Exhaust gas outlet; 43. Inspection port; 44. Threaded hole; 45. Cover plate; 46. Mounting hole; 47. Fixing bolt; 48. Inlet slot. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail below.

[0030] Example 1: A nitrogen generator, referring to Figure 1 , Figure 2 and Figure 3The device includes an outer casing 1, with a first partition 2 fixedly connected inside. The interior of the outer casing 1 is divided into an extraction chamber 3 and a working chamber 4 by the first partition 2. A second partition 5 is fixedly connected inside the working chamber 4. By using the first partition 2 to divide its internal space into the extraction chamber 3 and the working chamber 4, the internal layout of the equipment is more reasonable, and the functional areas of each part are clearly defined. The second partition 5 inside the working chamber 4 further optimizes space utilization and provides installation positions. An air storage tank 6 is fixedly connected to the upper end of the first partition 2. The air storage tank 6 is fixed on the first partition 2 and can pre-store a certain amount of filtered air to provide a stable air source for the subsequent nitrogen separation device. Multiple mounting brackets 7 arranged in a rectangular array are fixedly connected to the upper end of one side of the second partition 5. Each of the mounting brackets 7, in groups of four, is fixedly connected to an oil-water filter 8, a particulate filter 9, and a carbon adsorption filter 10. The mounting brackets 7 provide stable installation positions for the oil-water filter 8, particulate filter 9, and carbon adsorption filter 10, which are connected in series through pipes. This allows for step-by-step purification of the incoming air, removing oil, particulate impurities, and water vapor. The oil-water filter 8, particulate filter 9, and carbon adsorption filter 10 are all threaded to the bottom of a base shell 11. The base shell 11, threaded to the filter, is rotated and removed, and the internal filter elements are replaced. The oil-water filter 8, particulate filter 9, and carbon adsorption filter 10 are all connected by pipes. A first air inlet pipe 12 is fixedly connected to the input end of the oil-water filter 8. A first shut-off valve 13 is fixedly fitted onto the outer wall of the first air inlet pipe 12. The end of the first air inlet pipe 12 furthest from the input end of the oil-water filter 8 is fixedly... A first connecting pipe 14 is fixedly connected to the output end of the carbon adsorption filter 10, and a first air outlet pipe 15 is fixedly connected to the output end of the first air outlet pipe 10. A second shut-off valve 16 is fixedly sleeved on the outer wall of the first air outlet pipe 15. When the filter element needs to be replaced, the oil-water filter 8, particulate filter 9 and carbon adsorption filter 10 are disconnected from the subsequent process by closing the first shut-off valve 13 and the second shut-off valve 16. A second connecting pipe 17 is fixedly connected to the end of the first air outlet pipe 15 away from the output end of the carbon adsorption filter 10, and a first one-way valve 18 is fixedly connected to the input end of the gas storage tank 6. A second one-way valve 19 is fixedly connected to the output end of the gas storage tank 6. A third connecting pipe 20 is fixedly connected to the output end of the second one-way valve 19. A diaphragm pump 21 is fixedly connected to the upper end of the first partition 2 away from the gas storage tank 6. The end of the third connecting pipe 20 away from the second one-way valve 19 passes through the second partition 5 and is fixedly connected to the input end of the diaphragm pump 21. The clean air stored in the gas storage tank 6 can continuously supply gas to the subsequent nitrogen separation device, so as to maintain a continuous supply of nitrogen while replacing the filter element without stopping the machine. The diaphragm pump 21 provides power for the delivery of clean air, ensuring the stability of gas delivery in the subsequent nitrogen separation device and reducing fluctuations in nitrogen pressure and purity.

[0031] Example 2: A nitrogen generator, referring to Figure 3 , Figure 4 and Figure 6 The output end of the diaphragm pump 21 is fixedly connected to a fourth connecting pipe 22. The end of the fourth connecting pipe 22 away from the diaphragm pump 21 is fixedly connected to the input end of the nitrogen membrane 24. Two mirror-distributed fixing rings 23 are fixedly connected to the upper end of the side of the second partition 5 away from the mounting bracket 7. A nitrogen membrane 24 is fixedly connected inside the two fixing rings 23. An exhaust pipe 25 is fixedly connected to the exhaust end of the nitrogen membrane 24. A collection box 26 is fixedly connected to the upper side of the first partition 2. The exhaust end of the exhaust pipe 25 away from the nitrogen membrane 24 is fixedly connected to the collection box 26. By connecting the output end of the diaphragm pump 21 to the fourth connecting pipe 22, the nitrogen membrane 24, after undergoing initial... The filtered and pre-stored gas inside the gas storage tank 6 is stably delivered to the input end of the nitrogen membrane 24, providing a continuous gas source for the nitrogen separation process. The two mirror-distributed fixing rings 23 fixed on the second partition 5 can fix the nitrogen membrane 24, ensuring its stability during operation and preventing the nitrogen membrane 24 from shifting due to gas flow or equipment vibration, which would affect the separation effect. After completing nitrogen separation, the waste gas generated by the nitrogen membrane 24 is delivered to the collection box 26 through the waste gas pipe 25. The collection box 26 collects these waste gases centrally for use in laboratories or other closed environments to prevent direct emission of waste gas and environmental impact.

[0032] Reference Figure 1 , Figure 3 and Figure 6A first nitrogen pipe 27 is fixedly connected to the output end of a nitrogen membrane 24. A nitrogen concentration meter 28 is fixedly connected to the surface of the outer casing 1. The end of the first nitrogen pipe 27 away from the output end of the nitrogen membrane 24 is fixedly connected to the inlet end of the nitrogen concentration meter 28. A second nitrogen pipe 29 is fixedly connected to the output end of the nitrogen concentration meter 28. A regulating valve 30, a flow meter 31, and a nitrogen pressure gauge 32 are respectively fitted on the outer wall of the second nitrogen pipe 29. A nitrogen outlet 33 is fixedly connected to the end of the second nitrogen pipe 29 that passes through the outer casing 1. The regulating valve 30, the flow meter 31, and the nitrogen pressure gauge 32 are all installed through the surface of the outer casing 1 and connected to the first nitrogen pipe 27 through the output end of the nitrogen membrane 24, so that the separated nitrogen can be smoothly discharged and delivered to the nitrogen concentration meter 28 on the surface of the outer casing 1. The nitrogen concentration can be detected in real time, allowing staff to monitor nitrogen quality promptly. The output of the nitrogen concentration meter 28 is connected to the second nitrogen pipe 29, ensuring continuous delivery of the detected nitrogen to subsequent pipelines. The regulating valve 30, flow meter 31, and nitrogen pressure gauge 32, all mounted on the outer wall of the second nitrogen pipe 29, pass through the surface of the outer casing 1. Staff can flexibly control the nitrogen delivery rate through the regulating valve 30 and visually understand the flow and pressure status of the nitrogen using the flow meter 31 and nitrogen pressure gauge 32, ensuring that the nitrogen delivery meets usage requirements. One end of the second nitrogen pipe 29, which passes through the outer casing 1, is connected to the nitrogen outlet 33 for stable nitrogen output, facilitating real-time monitoring of the nitrogen output concentration and adjustment of output pressure and flow rate, thus improving the ease of use and reliability of the equipment.

[0033] Reference Figure 2 and Figure 6An air compressor 34 is fixedly connected to the bottom of the extraction chamber 3. An air delivery pipe 35 is fixedly connected to the output end of the air compressor 34. A three-way pipe 36 is fixedly connected to the end of the air delivery pipe 35 away from the air compressor 34. An air pressure gauge 37 is fixedly connected to the end of the three-way pipe 36 away from the air delivery pipe 35. The air pressure gauge 37 penetrates the surface of the outer casing 1. By fixing the air compressor 34 to the bottom of the extraction chamber 3, an air source is provided for the entire nitrogen generator. When the air compressor 34 is working, it continuously draws in and compresses air. The output end of the air compressor 34 is connected to the air delivery pipe 35, stably delivering the compressed air to the three-way pipe 36. The three-way pipe 36 acts as a diverter and transfer point, ensuring that the air can be smoothly guided to subsequent stages. The end of the three-way pipe 36 away from the air delivery pipe 35 is connected to the air pressure gauge 37. Pressure gauge 37 is installed through the surface of housing 1, allowing operators to directly and visually view the compressed air pressure status through the air pressure gauge 37 on housing 1, and promptly grasp the air supply status, providing a reliable air supply guarantee for subsequent gas filtration, nitrogen separation and other processes. The end of the first connecting pipe 14 away from the first air inlet pipe 12 passes through the second partition 5 and is fixedly connected to the three-way pipe 36. By passing the end of the first connecting pipe 14 away from the first air inlet pipe 12 through the second partition 5 and being fixedly connected to the three-way pipe 36, the compressed air generated by the air compressor 34 enters the three-way pipe 36 through the air delivery pipe 35, and then enters the first connecting pipe 14. The first connecting pipe 14 delivers the compressed air to the first air inlet pipe 12, and then enters the filtration device composed of oil-water filter 8, particulate filter 9 and carbon adsorption filter 10 through the first air inlet pipe 12.

[0034] Reference Figure 3 , Figure 6 and Figure 7A rotor pump 40 is fixedly connected to one side of the upper end of the first partition 2. The input end of the rotor pump 40 is fixedly connected to the collection box 26, and the output end of the rotor pump 40 passes through the outer shell 1 and is fixedly connected to an exhaust gas outlet 41. By fixing the rotor pump 40 to one side of the upper end of the first partition 2, the rotor pump 40 is used to extract the exhaust gas generated during the nitrogen separation process. The input end of the rotor pump 40 is connected to the exhaust gas box, and the exhaust end passes through the exhaust gas outlet 41 connected to the outer shell 1 to discharge the collected exhaust gas out of the equipment in a directional manner. This allows for more concentrated exhaust gas treatment, maintains the cleanliness of the internal environment of the equipment, and prevents excessive exhaust gas from affecting the operation of the equipment. An exhaust vent is fixedly connected to the bottom of the outer shell 1. The exhaust switch 38 and power switch 39 are electrically connected. The exhaust switch 38 is electrically connected to the rotor pump 40, and the power switch 39 is electrically connected to the diaphragm pump 21 and the air compressor 34 respectively. By fixing the exhaust switch 38 and power switch 39 to the bottom of the surface of the housing 1, the operator can more conveniently operate the equipment and discharge exhaust gas. The exhaust switch 38 is electrically connected to the rotor pump 40. Opening the exhaust switch 38 will control the rotor pump 40 to start and discharge the exhaust gas in the equipment. The power switch 39 is electrically connected to the diaphragm pump 21 and the air compressor 34 respectively. Operating the power switch 39 can directly control the start and stop of the diaphragm pump 21 and the air compressor 34, allowing the operator to flexibly adjust the operating status of the equipment.

[0035] Reference Figure 2 , Figure 5 and Figure 7An inspection port 42 is provided on the upper part of one side of the outer casing 1. Four threaded holes 43 arranged in a rectangular array are also provided on one side of the outer casing 1. A cover plate 44 is slidably disposed inside the inspection port 42. Mounting holes 45 are provided through the cover plate 44. Fixing bolts 46 are slidably disposed inside the four mounting holes 45. One end of each fixing bolt 46 passes through the mounting holes 45 and is threaded into the threaded holes 43. The inspection port 42 on the upper part of one side of the outer casing 1, combined with the cover plate 44 slidably disposed within the inspection port 42, provides a convenient passage for the inspection and maintenance of the oil-water filter 8, particulate filter 9, and carbon adsorption filter 10 inside the equipment. The mounting holes are also provided through the cover plate 44. The threaded holes 43 arranged in a rectangular array on one side of the outer casing 1 correspond to the mounting holes 45. When maintenance is required, simply remove the fixing bolts 46 from the mounting holes 45 and threaded holes 43 to easily remove the cover plate 44, exposing the oil-water filter 8, particulate filter 9, and carbon adsorption filter 10, etc., making it convenient for staff to inspect or replace the filter elements. After maintenance, the cover plate 44 is reset, and the fixing bolts 46 are threaded through the mounting holes 45 and threaded holes 43 to securely fix the cover plate 44, ensuring the sealing and safety of the equipment. Multiple air inlet slots 47 arranged in a straight line array are opened on both sides of the air extraction chamber 3. The linear array of air inlet slots 47 allows external air to enter the extraction chamber 3 more smoothly, enabling the air compressor 34 to continuously draw in and compress air, providing a stable air source for subsequent gas filtration and nitrogen separation processes, thus improving the equipment's intake efficiency and operational stability. The end of the second connecting pipe 17 furthest from the first outlet pipe 15 is fixedly connected to the input end of the first one-way valve 18. The end of the third connecting pipe 20 furthest from the second one-way valve 19 passes through the second partition 5 and is fixedly connected to the input end of the diaphragm pump 21. By fixing the end of the second connecting pipe 17 furthest from the first outlet pipe 15 to the input end of the first one-way valve 18, the air intake is continuously drawn in and compressed by the air compressor 34, providing a stable air source for subsequent gas filtration and nitrogen separation processes, thus improving the equipment's intake efficiency and operational stability. The filtered gas can enter the first one-way valve 18 through the pipeline. The one-way conduction characteristic of the first one-way valve 18 prevents gas backflow. At the same time, the end of the third connecting pipe 20 away from the second one-way valve 19 passes through the second partition 5 and is fixedly connected to the input end of the diaphragm pump 21. This allows the gas pre-stored in the gas storage tank 6 to be drawn by the diaphragm pump 21 through the second one-way valve 19 and the third connecting pipe 20. The diaphragm pump 21 provides power for gas delivery, pushing the gas into the subsequent nitrogen separation stage. This ensures the stability of the gas flow direction, avoids gas backflow, and allows the treated gas to continuously and stably enter the next process, ensuring the continuity of the nitrogen generation process.

[0036] The implementation principle of this application embodiment is as follows: During operation, the power switch 39 is first turned on, and the air compressor 34 and diaphragm pump 21 are started. External air is introduced through the air inlet slots 47 on both sides of the air extraction chamber 3. After the air compressor 34 in the air extraction chamber 3 starts, it draws in air and compresses it. The compressed air is delivered to the three-way pipe 36 through the air delivery pipe 35. The three-way pipe 36 introduces the compressed air into the first connecting pipe 14 and the air pressure gauge 37. The air pressure is displayed in real time through the air pressure gauge 37, and then delivered to the first air inlet pipe through the first connecting pipe 14. The air then enters a filtration system consisting of an oil-water filter 8, a particulate filter 9, and a carbon adsorption filter 10. Through this step-by-step filtration, oil, particulate impurities, and water vapor are removed from the air. The purified clean air then enters the air storage tank 6 through the first outlet pipe 15, the second connecting pipe 17, and the first one-way valve 18. A diaphragm pump 21 extracts clean air from the air storage tank 6, but does not remove all clean air from the tank; a portion is stored for later use when replacing the filter element. Clean air is delivered to the input end of the nitrogen membrane 24 through the fourth connecting pipe 22. After the clean air is separated by the nitrogen membrane 24, the waste gas generated during the separation process is delivered to the collection box 26 through the waste gas pipe 25 to temporarily collect the separated waste gas. Nitrogen gas is discharged from the output end of the nitrogen membrane 24 and delivered to the nitrogen concentration meter 28 through the first nitrogen pipe 27 to detect whether the concentration of the separated nitrogen gas meets the usage requirements. After passing through the nitrogen concentration meter 28, the nitrogen gas enters the second nitrogen pipe 29. The outer wall of the second nitrogen pipe 29 is fitted with... The regulating valve 30, flow meter 31, and nitrogen pressure gauge 32 all pass through the surface of the outer shell 1. The operator can flexibly control the nitrogen supply through the regulating valve 30 and intuitively understand the flow and pressure status of the nitrogen with the help of the flow meter 31 and nitrogen pressure gauge 32 to ensure that the nitrogen supply meets the usage requirements. The second nitrogen pipe 29 passes through the outer shell 1 and is connected to the nitrogen outlet 33 to stably output nitrogen for use. After use, the exhaust switch 38 can be turned on to start the rotor pump 40 to discharge the waste gas inside the collection box 26. When the filter element needs to be replaced, turn off the air compressor pump, remove the fixing bolt 46 from the mounting hole 45 and threaded hole 43, and remove the cover plate 44 to expose the oil-water filter 8, particulate filter 9, and carbon adsorption filter 10. Close the first shut-off valve 13 and the second shut-off valve 16 to disconnect the pipeline between the filter device and the subsequent nitrogen separation device. At this time, the diaphragm pump 21 continues to work, drawing out the clean air pre-stored in the air tank 6 through the second one-way valve 19 and the third connecting pipe 20, and steadily pushing it to the nitrogen membrane 24 through the fourth connecting pipe 22 for continuous nitrogen separation. Since the pipeline between the filter device and the nitrogen separation device has been cut off, and with the double protection of the first one-way valve 18, the clean air inside the air tank 6 will not flow back, so that the nitrogen separation device can continue to operate during the filter element replacement process. In the process of using the filter, the bottom shell 11, which is threadedly connected to the filter, is rotated and removed, and the internal filter element is replaced. After replacement, the bottom shell 11 is installed at the bottom of the corresponding oil-water filter 8, particulate filter 9, and carbon adsorption filter 10. The first shut-off valve 13 and the second shut-off valve 16 are opened, the air compressor 34 is started, and the cover plate 44 is bolted to one side of the outer shell 1 to seal the inspection port 42. The air generated by the air compressor 34 is filtered by the filter device and first enters the air storage tank 6. Since the filtered air does not directly enter the nitrogen membrane 24, and the gas inside the nitrogen membrane 24 is provided by the diaphragm pump 21, the two will not interfere with each other. This means that the device does not require additional debugging, ensuring that the nitrogen purity remains stable and effectively avoiding the impact of pressure fluctuations on the nitrogen concentration.

Claims

1. A nitrogen gas generator comprising a housing (1), characterised in that: The shell (1) is fixedly connected with a first partition (2) inside, the shell (1) is divided into an air extraction chamber (3) and a working chamber (4) by the first partition (2) inside, the working chamber (4) is fixedly connected with a second partition (5) inside, the first partition (2) is fixedly connected with a gas storage tank (6) on the upper end, the second partition (5) is fixedly connected with a plurality of mounting racks (7) arranged in a rectangular array on the upper end of one side, a plurality of the mounting racks (7) are fixedly connected with an oil-water filter (8), a particle filter (9) and a carbon adsorption filter (10) between four groups, the oil-water filter (8), the particle filter (9) and the carbon adsorption filter (10) are all threadedly connected with a bottom shell (11) at the bottom end, the oil-water filter (8), the particle filter (9) and the carbon adsorption filter (10) are connected by pipelines, the input end of the oil-water filter (8) is fixedly connected with a first air inlet pipe (12), the first air inlet pipe (12) is fixedly sleeved with a first stop valve (13) on the outer wall, one end of the first air inlet pipe (12) away from the input end of the oil-water filter (8) is fixedly connected with a first connecting pipe (14), the output end of the carbon adsorption filter (10) is fixedly connected with a first air outlet pipe (15), the first air outlet pipe (15) is fixedly sleeved with a second stop valve (16) on the outer wall, one end of the first air outlet pipe (15) away from the output end of the carbon adsorption filter (10) is fixedly connected with a second connecting pipe (17). The input end of the gas storage tank (6) is fixedly connected with a first check valve (18), the output end of the gas storage tank (6) is fixedly connected with a second check valve (19), the output end of the second check valve (19) is fixedly connected with a third connecting pipe (20), the upper end of the first partition (2) is fixedly connected with a diaphragm pump (21) on the side away from the gas storage tank (6), one end of the third connecting pipe (20) away from the second check valve (19) is fixedly connected with the input end of the diaphragm pump (21) penetrating through the second partition (5).

2. A nitrogen gas generator according to claim 1, characterized in that: The output end of the diaphragm pump (21) is fixedly connected with a fourth connecting pipe (22), one end of the fourth connecting pipe (22) away from the diaphragm pump (21) is fixedly connected with the input end of a nitrogen membrane (24), the upper end of the side away from the mounting rack (7) of the second partition (5) is fixedly connected with two fixed rings (23) arranged in a mirror image, the nitrogen membrane (24) is fixedly connected inside the two fixed rings (23), the waste gas end of the nitrogen membrane (24) is fixedly connected with a waste gas pipe (25), one end of the waste gas pipe (25) away from the waste gas end of the nitrogen membrane (24) is fixedly connected with a collection box (26) on one side of the upper end of the first partition (2).

3. A nitrogen gas generator according to claim 2, wherein: The output end of the nitrogen film (24) is fixedly connected with a first nitrogen pipe (27), the surface of the shell (1) is fixedly connected with a nitrogen concentration meter (28), one end of the first nitrogen pipe (27) away from the output end of the nitrogen film (24) is fixedly connected with the air inlet end of the nitrogen concentration meter (28), the output end of the nitrogen concentration meter (28) is fixedly connected with a second nitrogen pipe (29), the outer wall of the second nitrogen pipe (29) is sleeved with a regulating valve (30), a flow meter (31) and a nitrogen pressure gauge (32) respectively, one end of the second nitrogen pipe (29) penetrating through the shell (1) is fixedly connected with a nitrogen air outlet nozzle (33), and the regulating valve (30), the flow meter (31) and the nitrogen pressure gauge (32) are arranged through the surface of the shell (1).

4. A nitrogen gas generator according to claim 1, characterized in that: The bottom end of the air extraction chamber (3) is fixedly connected with an air compressor (34), the output end of the air compressor (34) is fixedly connected with an air conveying pipe (35), one end of the air conveying pipe (35) away from the air compressor (34) is fixedly connected with a three-way pipe (36), one end of the three-way pipe (36) away from the air conveying pipe (35) is fixedly connected with an air pressure gauge (37), and the air pressure gauge (37) is arranged through the surface of the shell (1).

5. A nitrogen gas generator according to claim 1, characterized in that: One end of the first connecting pipe (14) away from the first air inlet pipe (12) penetrates through the second partition plate (5) and is fixedly connected with the three-way pipe (36).

6. A nitrogen gas generator according to claim 1, characterized in that: The upper end of the first partition plate (2) is fixedly connected with a rotor pump (40) on one side, the input end of the rotor pump (40) is fixedly connected with the collecting box (26), and the output end of the rotor pump (40) penetrates through the shell (1) and is fixedly connected with a waste gas air outlet nozzle (41).

7. A nitrogen gas generator as defined in claim 1, wherein: The surface of the shell (1) is fixedly connected with an exhaust switch (38) and a power switch (39) at the bottom end, the exhaust switch (38) is electrically connected with the rotor pump (40), and the power switch (39) is electrically connected with the diaphragm pump (21) and the air compressor (34) respectively.

8. A nitrogen gas generator according to claim 1, characterized in that: A maintenance opening (42) is formed in the upper end of one side of the shell (1), four threaded holes (43) arranged in a rectangular array are formed in one side of the shell (1), a cover plate (44) is slidably arranged in the maintenance opening (42), mounting holes (45) are formed through the cover plate (44), and four fixed bolts (46) are slidably arranged in the mounting holes (45). One end of each of the four fixed bolts (46) penetrating through the mounting hole (45) is threadedly connected with the threaded hole (43).

9. A nitrogen gas generator according to claim 1, characterized in that: A plurality of air inlet grooves (47) arranged in a straight line array are formed in the two sides of the air extraction chamber (3).

10. A nitrogen gas generator according to claim 1, characterized in that: One end of the second connecting pipe (17) away from the first air outlet pipe (15) is fixedly connected with the input end of the first one-way valve (18), and one end of the third connecting pipe (20) away from the second one-way valve (19) penetrates through the second partition plate (5) and is fixedly connected with the input end of the diaphragm pump (21).

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