Nitrogen generator molecular sieve assembly

Abstract

The utility model discloses a kind of nitrogen generator molecular sieve assemblies, it is related to gas separation technical field.The utility model includes jar body, the bottom of jar body is fixedly installed with filter box, the side of filter box is fixedly installed with motor, the outside of exhaust pipe is fixedly installed with two conveying pipes symmetrically, the inside of jar body close to bottom end is fixedly installed with base, the inside of jar body is fixedly installed with partition, the both sides of partition are fixedly installed with limit plate symmetrically, the top of base, and two detachable molecular sieve assemblies for facilitating replacement are positioned symmetrically in the position of the both sides of partition, the bottom of base, and two sealing assemblies are positioned symmetrically in the inside of filter box, filter assembly is arranged in the inside of filter box, detachable molecular sieve assembly is composed of storage box and first sealing ring, in the embodiment, by setting detachable molecular sieve assembly, when molecular sieve is invalid, it can be quickly disassembled and replaced, reduce equipment downtime, guarantee nitrogen production continuity.

Description

Technical Field

[0001] This utility model relates to the field of gas separation technology, specifically to a molecular sieve component for a nitrogen generator. Background Technology

[0002] Nitrogen is widely used in many fields such as industrial production, food processing, and electronics manufacturing because of its chemical stability and resistance to reaction with other substances. It is used in protective gas applications and the creation of inert environments, and the market demand for nitrogen preparation equipment continues to grow.

[0003] However, during long-term use, the core molecular sieve component of existing nitrogen generators will require periodic replacement and maintenance due to issues such as adsorption saturation and performance degradation. However, the current structural design of nitrogen generators has obvious shortcomings. When replacing the molecular sieve, the outer shell of the equipment must be disassembled to access the component to be replaced. The entire operation process is cumbersome and complicated, which not only causes many inconveniences for maintenance personnel and increases the labor intensity of maintenance work, but more importantly, the nitrogen generator must be completely shut down during the replacement process, which leads to the interruption of the nitrogen production process, seriously affecting the continuous production of enterprises, reducing the overall production efficiency, and failing to meet the actual needs of continuous operation and rapid maintenance of equipment in industrial scenarios. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a molecular sieve assembly for a nitrogen generator, which has the advantages of enabling molecular sieve replacement without shutting down the machine, convenient replacement operation, ensuring nitrogen generation sealing and continuity, and improving maintenance and production efficiency. This solves the problem that existing nitrogen generators require disassembling the outer casing and stopping the machine when replacing the molecular sieve, which is inconvenient and affects production efficiency.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a nitrogen generator molecular sieve assembly, including a tank, a filter box fixedly installed at the bottom of the tank, a motor fixedly installed on one side of the filter box, two conveying pipes symmetrically fixedly installed on the outer side of the exhaust pipe, a base fixedly installed inside the tank near the bottom, a partition plate fixedly installed inside the tank, limit plates symmetrically fixedly installed on both sides of the partition plate, the bottom surface of the partition plate fixedly installed to the top of the base, four movable holes symmetrically opened on the top of the base, two easily replaceable detachable molecular sieve assemblies symmetrically arranged on the top of the base and on both sides of the partition plate, two sealing assemblies symmetrically arranged on the bottom of the base and inside the filter box, a filter assembly is arranged inside the filter box, and the detachable molecular sieve assembly consists of a storage box and a first sealing ring.

[0006] As a preferred technical solution of this utility model, the detachable molecular sieve assembly includes a storage box, which is disposed on the top of the base. The bottom of the storage box has several air inlets and a sealing groove. Two top rods are symmetrically fixedly installed near the middle of the bottom of the storage box, and the top rods pass through the movable holes.

[0007] As a preferred technical solution of this utility model, the detachable molecular sieve assembly further includes a connecting pipe, which is fixedly installed on the top of the storage box. A threaded sleeve is rotatably installed on the outer side of the connecting pipe near the top, and the threaded sleeve is threadedly connected to the outer side of the conveying pipe near the bottom.

[0008] As a preferred technical solution of this utility model, the detachable molecular sieve assembly further includes an installation groove, which is opened on the top of the base. A plurality of first springs are fixedly installed on the bottom surface of the installation groove, and an installation plate is fixedly installed on the top of the plurality of first springs. A first sealing ring is fixedly installed on the top of the installation plate, and the first sealing ring is movably sleeved inside the sealing groove.

[0009] As a preferred embodiment of this utility model, the sealing assembly includes two U-shaped frames, which are fixedly installed at the bottom of the base. A second spring is fixedly installed on the inner bottom surface of the U-shaped frame. A sealing plate is movably installed inside the two U-shaped frames. The bottom of the sealing plate near one end is fixedly installed with the top of the second spring. A second sealing ring is fixedly installed on the top of the sealing plate. The top rod is used in conjunction with the sealing plate.

[0010] As a preferred embodiment of this utility model, the filter assembly includes a turntable, which is fixedly installed at the output end of a motor. A connecting rod is movably installed at the front end of the turntable near its side via a round rod. A rectangular tube is fixedly installed at the bottom of the connecting rod. One end of the rectangular tube passes through the filter box, and several flexible tubes are fixedly installed on one side of the rectangular tube.

[0011] As a preferred embodiment of this utility model, the filter assembly further includes several rectangular plates, which are axially equidistantly rotatably installed inside the filter box. The tops of the rectangular plates are rotatably installed with the bottoms of the rectangular tubes. The other end of the flexible tube is fixedly installed with the top of the rectangular plate. A rectangular groove is provided at one end of the rectangular plate, and the other end of the flexible tube is connected to the rectangular groove. A sealing plug is fixedly installed inside the rectangular groove. Circular holes are symmetrically provided on both sides of the inside of the rectangular groove. Sponge plates are fixedly installed on both sides of the rectangular plate.

[0012] As a preferred embodiment of this utility model, two arc-shaped doors are symmetrically arranged on the outer side of the tank body. Two third springs are symmetrically fixedly installed on the inner side of the arc-shaped doors. An arc-shaped pressure plate is fixedly installed on the other end of the third spring. An L-shaped fixing rod is fixedly installed on the outer side of the arc-shaped doors. An insertion hole is opened at the top of the L-shaped fixing rod. Two U-shaped frames are fixedly installed on the outer side of the tank body. An insertion rod is inserted into the top of the U-shaped frame. A circular plate is fixedly installed on the top of the insertion rod. A third spring is fixedly installed at the bottom of the circular plate. The other end of the third spring is fixedly installed to the top of the U-shaped frame. The side of the insertion rod near the bottom is set with an inclined surface. The insertion rod is movably sleeved inside the insertion hole.

[0013] As a preferred embodiment of this utility model, the top of the base is provided with several symmetrical ventilation holes, and a spiral blade is fixedly installed inside the ventilation holes.

[0014] The beneficial effects of this utility model are as follows: This invention allows for the connection of an external liquid pump and a purification reagent via a rectangular tube. The reagent flows through a flexible tube and a rectangular trough, exiting through a round hole to wet the sponge plate, effectively adsorbing dust and other impurities from the air. The spiral blades inside the vent hole buffer the airflow, slowing down the flow rate and allowing the airflow to enter the storage box more evenly and slowly through the air inlet, enabling the molecular sieve to perform nitrogen separation operations more stably.

[0015] The combination of the detachable molecular sieve assembly and the sealing assembly ensures the airtightness of the nitrogen production process and facilitates subsequent maintenance. The top rod at the bottom of the storage tank works with the sealing plate. When the storage tank is installed in place, the top rod presses down on the sealing plate, so that the second sealing ring no longer blocks the base through hole, allowing airflow to pass smoothly. When replacing the molecular sieve, the storage tank is removed, the second spring pushes the sealing plate up, and the second sealing ring re-seals, preventing unfiltered air from entering the tank. Furthermore, the threaded connection between the threaded sleeve and the delivery pipe, as well as the first sealing ring, which is lifted by the first spring and embedded in the sealing groove, allow for quick assembly and disassembly of the storage tank, greatly reducing maintenance difficulty and avoiding inefficiency caused by prolonged downtime. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the molecular sieve component structure of a nitrogen generator according to this utility model; Figure 2 This is a schematic diagram of the back structure of a molecular sieve assembly for a nitrogen generator according to this utility model; Figure 3 This is a schematic diagram of the internal structure of the tank body of this utility model; Figure 4 This is a schematic diagram of the partition plate structure of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the base of this utility model; Figure 6This is a schematic diagram of the sealing assembly structure of this utility model; Figure 7 This is a schematic diagram of the cross-sectional structure of the storage box of this utility model; Figure 8 This is a schematic diagram of the filter box structure of this utility model; Figure 9 This is a schematic diagram of the rectangular tube structure of this utility model; Figure 10 This is a schematic diagram of the rectangular plate structure of this utility model; Figure 11 This is an enlarged structural schematic diagram of utility model A; Figure 12 This is a schematic diagram of the tank structure of this utility model; Figure 13 This is an enlarged structural schematic diagram of utility model B; Figure 14 This is a schematic diagram of the arc-shaped door structure of this utility model.

[0017] Reference numerals: 1. Tank body; 2. Filter box; 3. Motor; 4. Base; 5. Divider plate; 6. Vent hole; 7. Spiral blade; 8. Storage box; 9. Sealing groove; 10. Top rod; 11. Threaded sleeve; 12. Mounting groove; 13. First spring; 14. First sealing ring; 15. Movable hole; 16. U-shaped frame; 17. Second spring; 18. Sealing plate; 19. Second sealing ring; 20. Turntable; 21. Connecting rod; 22. Rectangular tube; 23. Rectangular plate; 24. Rectangular groove; 25. Sponge board. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0019] Figures 1-14 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 -Appendix Figure 14 The present invention will be further described below.

[0020] A molecular sieve assembly for a nitrogen generator includes a tank 1, a filter box 2 fixedly installed at the bottom of the tank 1, a motor 3 fixedly installed on one side of the filter box 2, two conveying pipes symmetrically fixedly installed on the outside of the exhaust pipe, a base 4 fixedly installed inside the tank 1 near the bottom, a partition plate 5 fixedly installed inside the tank 1, limit plates symmetrically fixedly installed on both sides of the partition plate 5, the bottom surface of the partition plate 5 fixedly installed to the top of the base 4, four movable holes 15 symmetrically opened on the top of the base 4, two easily replaceable detachable molecular sieve assemblies symmetrically arranged on the top of the base 4 and on both sides of the partition plate 5, two sealing assemblies symmetrically arranged on the bottom of the base 4 and inside the filter box 2, a filter assembly is arranged inside the filter box 2, and the detachable molecular sieve assembly consists of a storage box 8 and a first sealing ring 14. Several ventilation holes 6 are symmetrically opened on the top of the base 4, and spiral blades 7 are fixedly installed inside the ventilation holes 6.

[0021] In this embodiment, tank 1 serves as the main mounting carrier for the molecular sieve assembly of the nitrogen generator, forming a closed nitrogen generation environment. This prevents gas leakage during the preparation process and ensures the sealing and efficiency of nitrogen production. Filter box 2 is fixed to the bottom of tank 1, providing installation and protection space for motor 3 and filter assembly, while also accommodating the air to be filtered. This allows the air to fully contact the filter assembly inside the box, completing impurity filtration and providing clean pretreatment for subsequent air entering tank 1. Delivery pipes are symmetrically fixed to the outside of the exhaust pipe, and a one-way valve is installed on the outside of the delivery pipe to release nitrogen separated from the molecular sieve in storage box 8 of the detachable molecular sieve assembly. The nitrogen is delivered to the exhaust pipe for export and collection. When disassembling storage box 8, the one-way valve on the outside of the delivery pipe needs to be closed. Base 4 is fixed inside the tank 1 near the bottom, providing bottom support for partition plate 5, allowing partition plate 5 to stably divide the internal space of tank 1. Limiting plates are symmetrically fixed on both sides of partition plate 5, limiting the position of storage box 8 on top of base 4 to prevent displacement during installation or operation. Movable holes 15 are symmetrically opened on the top of base 4, providing a through channel for the top rod 10 at the bottom of storage box 8 in the detachable molecular sieve assembly. Vent holes 6 are symmetrically opened on the top of base 4, allowing the nitrogen from the filter box 2 to pass through after being processed by the filter assembly. The key flow channel for clean air entering the storage box 8 has internal spiral blades 7 that regulate airflow, ensuring orderly airflow into the storage box 8 and contact with the molecular sieve. When air passes through the vent 6, the spiral blades 7 slow down the airflow and guide it, causing it to flow slowly and evenly towards the air inlet at the bottom of the storage box 8, thus improving the molecular sieve's nitrogen separation efficiency. An air inlet pipe is fixedly installed on one side of the filter box 2, and a drain pipe is fixedly installed at the bottom. The air inlet pipe delivers air into the filter box 2, while the drain pipe has a one-way valve to discharge impurities from inside the filter box 2. The detachable molecular sieve assembly... The filter assembly is located on top of the base 4 and on both sides of the partition plate 5. It consists of a storage box 8 and a first sealing ring 14. The molecular sieve filled in the storage box 8 can separate nitrogen from the filtered air. This component is easy to replace. When the molecular sieve fails, it can be quickly disassembled and replaced, reducing equipment downtime and ensuring continuous nitrogen production. The sealing component can cooperate with the top rod 10 of the detachable molecular sieve component. When the storage box 8 is installed in place, the top rod 10 presses down on the sealing plate 18 of the sealing component, opening the vent 6 so that air can pass through normally. The sponge plate 25 in the filter assembly can fully contact the air and adsorb dust and other impurities in the air, pre-treating the air.

[0022] Specifically, the detachable molecular sieve assembly includes a storage box 8, which is located on top of the base 4. The bottom of the storage box 8 has several air inlets and a sealing groove 9. Two top rods 10 are symmetrically fixedly installed near the middle of the bottom of the storage box 8, and the top rods 10 pass through the movable hole 15.

[0023] In this embodiment, a storage box 8 is set on top of the base 4, and is used to store molecular sieves, providing a stable installation and working space for the molecular sieves. The air inlet at the bottom can receive clean air supplied through the air vent 6 of the base 4, allowing the air to fully contact the internal molecular sieves and achieve nitrogen separation. At the same time, the sealing groove 9 at the bottom cooperates with the first sealing ring 14 to enhance the sealing between the storage box 8 and the base 4. The air inlet is located at the bottom of the storage box 8 and is the only channel for clean air filtered through the air vent 6 of the base 4 to enter the storage box 8, ensuring that the air can flow into the storage box 8 in a directional manner and contact the molecular sieves, providing raw material air for nitrogen separation. The sealing groove 9 is located at the bottom of the storage box 8 to accommodate the first sealing ring 14, allowing the first sealing ring 14 to be tightly sealed. The top rod 10 is symmetrically fixed at the bottom of the storage box 8 near the middle position and passes through the movable hole 15 of the base 4. When the storage box 8 is installed, the top rod 10 moves downward with the storage box 8, which will press down the sealing plate 18 of the sealing assembly at the bottom of the base 4, causing the sealing plate 18 to compress the second spring 17 and move downward, thereby allowing the second sealing ring 19 to detach from the bottom of the base 4, opening the vent 6 to allow clean air to pass through. When the storage box 8 is removed, the top rod 10 moves upward with the storage box 8 and detaches from the sealing plate 18. The second spring 17 restores its elastic deformation and pushes the sealing plate 18 upward, so that the second sealing ring 19 re-fits the bottom of the base 4, preventing unfiltered air from entering the tank 1.

[0024] Specifically, the detachable molecular sieve assembly also includes a connecting pipe, which is fixedly installed on the top of the storage box 8. A threaded sleeve 11 is rotatably installed on the outer side of the connecting pipe near the top, and the threaded sleeve 11 is threadedly connected to the outer side of the conveying pipe near the bottom.

[0025] In this embodiment, a connecting pipe is fixedly installed on the top of the storage tank 8. One end of the connecting pipe is connected to the inside of the storage tank 8 to receive nitrogen gas, and a threaded sleeve 11 is rotatably installed on the outer side of the other end. The outer side of the delivery pipe near the bottom end is threaded. The threaded sleeve 11 is connected to the delivery pipe to achieve directional transmission of nitrogen gas from the storage tank 8 to the delivery pipe. A sealing gasket is fixedly installed at the bottom end of the delivery pipe. The threaded sleeve 11 is engaged with the thread on the outer side of the delivery pipe near the bottom end to achieve a detachable connection between the connecting pipe and the delivery pipe. At the same time, the sealing gasket can ensure the sealing between the delivery pipe and the connecting pipe.

[0026] Specifically, the detachable molecular sieve assembly also includes an installation groove 12, which is located on the top of the base 4. Several first springs 13 are fixedly installed on the bottom surface of the installation groove 12. An installation plate is fixedly installed on the top of the several first springs 13. A first sealing ring 14 is fixedly installed on the top of the installation plate. The first sealing ring 14 is movably fitted inside the sealing groove 9.

[0027] In this embodiment, by setting the mounting groove 12 on the top of the base 4, a dedicated mounting space is provided for the first spring 13, the mounting plate, and the first sealing ring 14, preventing them from shifting laterally during use and ensuring that the first sealing ring 14 can be accurately aligned with the sealing groove 9 at the bottom of the storage box 8. The first spring 13 is fixedly installed on the inner bottom surface of the mounting groove 12 and connected to the mounting plate at the top, and has elastic telescopic characteristics. When the storage box 8 is installed on the top of the base 4, the storage box 8 will exert downward pressure on the mounting plate, and the first spring 13 will be compressed. Under the elastic reaction force of the first spring 13, the mounting plate will be pushed upward, thereby causing the first sealing ring 14 on the top of the mounting plate to be tightly embedded in the sealing groove 9, enhancing the sealing effect.

[0028] Specifically, the sealing assembly includes two U-shaped brackets 16, which are fixedly installed at the bottom of the base 4. A second spring 17 is fixedly installed on the inner bottom surface of the U-shaped brackets 16. A sealing plate 18 is movably installed inside the two U-shaped brackets 16. The bottom of the sealing plate 18 near one end is fixedly installed with the top of the second spring 17. A second sealing ring 19 is fixedly installed on the top of the sealing plate 18. The top rod 10 is used in conjunction with the sealing plate 18.

[0029] In this embodiment, two U-shaped frames 16 are fixedly installed at the bottom of the base 4 to provide stable installation and movement space for the second spring 17 and the sealing plate 18. At the same time, they limit and guide the vertical movement of the sealing plate 18 to prevent lateral displacement of the sealing plate 18 during movement. The second spring 17 is fixedly installed on the bottom surface inside the U-shaped frame 16, with its top end connected to the bottom of the sealing plate 18 near one end. It has elastic extension and contraction characteristics. When the top rod 10 does not apply pressure to the sealing plate 18, the second spring 17 is in a naturally extended state, pushing the sealing plate 18 upward, so that the second sealing ring 19 at the top of the sealing plate 18 fits tightly against the bottom of the base 4, thereby sealing the vent hole 6. When the top rod 10 of the detachable molecular sieve assembly passes through the movable hole 15 and presses down on the sealing plate 18, the sealing plate 18 moves downward along the U-shaped frame 16, causing the second sealing ring 19 to detach from the bottom of the base 4, thereby opening the vent hole 6.

[0030] Specifically, the filter assembly includes a turntable 20, which is fixedly installed at the output end of the motor 3. A connecting rod 21 is movably installed at the front end of the turntable 20 and near the side via a round rod. A rectangular tube 22 is fixedly installed at the bottom of the connecting rod 21. One end of the rectangular tube 22 passes through the filter box 2, and several flexible tubes are fixedly installed on one side of the rectangular tube 22.

[0031] In this embodiment, a turntable 20 is fixedly installed at the output end of the motor 3. When the motor 3 is powered by an external power source and starts running, it will directly drive the turntable 20 to rotate around the output shaft of the motor 3. The front end of the turntable 20 is movably connected to the connecting rod 21 via a round rod near the side, which can convert its own rotational motion into the reciprocating motion of the connecting rod 21. One end of the rectangular tube 22 passes through the filter box 2, and several hoses are fixedly installed on one side. The rectangular tube 22 can be connected to an external liquid pump and a purification reagent through the end that passes through the filter box 2, and the purification reagent is delivered to the hoses on one side. The rectangular tube 22 will reciprocate in the horizontal direction under the drive of the connecting rod 21. A sealing gasket is fixedly installed inside the hole through which the rectangular tube 22 passes through the filter box 2, which fits tightly against the outer wall of the rectangular tube 22 and the hole wall, sealing the gap between the two and preventing the air to be filtered inside the filter box 2 from leaking out of the gap. The hoses play the role of delivering the purification reagent. The hoses have a certain degree of flexibility and can deform flexibly with the reciprocating motion of the rectangular tube 22 to avoid damage caused by the movement of the rectangular tube 22.

[0032] Specifically, the filter assembly also includes several rectangular plates 23, which are axially equidistantly rotatably installed inside the filter box 2. The top of the rectangular plates 23 is rotatably installed with the bottom of the rectangular tube 22, and the other end of the hose is fixedly installed with the top of the rectangular plate 23. A rectangular groove 24 is opened at one end of the rectangular plate 23, and the other end of the hose is connected to the rectangular groove 24. A sealing plug is fixedly installed inside the rectangular groove 24, and round holes are symmetrically opened on both sides of the inside of the rectangular groove 24. Sponge plates 25 are fixedly installed on both sides of the rectangular plate 23.

[0033] In this embodiment, several rectangular plates 23 are axially equidistantly rotatably installed inside the filter box 2. Their tops are rotatably connected to the bottom of the rectangular tube 22 and fixedly installed to the other end of the flexible hose. When the rectangular tube 22 reciprocates under the drive of the connecting rod 21, it pulls the rectangular plates 23 to rotate around their own mounting axis, expanding the contact range between the sponge plates 25 on both sides and the air inside the filter box 2. Simultaneously, a rectangular groove 24 at one end of the rectangular plate 23 provides temporary storage space for the purification reagent. This, combined with the round holes, facilitates the delivery of the reagent to the sponge plate 25. The rectangular groove 24, located at one end of the rectangular plate 23 and connected to the other end of the flexible hose, is used to temporarily store the purification reagent delivered by the hose. A sealing plug is fixed inside the groove. This design prevents reagent leakage from the opening of the rectangular trough 24. The symmetrical circular holes on both sides guide the reagent in the rectangular trough 24 to the sponge plates 25 on both sides of the rectangular plate 23, realizing the transition of reagent from temporary storage to discharge. This ensures that the sponge plates 25 can continuously adsorb reagent. The sponge plates 25 are fixedly installed on both sides of the rectangular plate 23. They adsorb the impurity removal reagent discharged from the rectangular trough 24 through the circular holes, forming a "reagent adsorption layer". When the rectangular plate 23 rotates under the drive of the rectangular tube 22, the sponge plates 25 can expand the contact area with the air in the filter box 2, allowing impurities in the air to fully contact and be adsorbed by the reagent on the sponge plates 25, completing the air pretreatment and providing a clean gas source for subsequent molecular sieve nitrogen production.

[0034] Specifically, two arc-shaped doors are symmetrically arranged on the outer side of the tank body 1. Two third springs are symmetrically fixedly installed on the inner side of the arc-shaped doors. An arc-shaped pressure plate is fixedly installed on the other end of the third spring. An L-shaped fixing rod is fixedly installed on the outer side of the arc-shaped doors. An insertion hole is opened at the top of the L-shaped fixing rod. Two U-shaped frames are fixedly installed on the outer side of the tank body 1. An insertion rod is inserted into the top of the U-shaped frame. A circular plate is fixedly installed on the top of the insertion rod. A third spring is fixedly installed at the bottom of the circular plate. The other end of the third spring is fixedly installed with the top of the U-shaped frame. The side of the insertion rod near the bottom is set at an angle. The insertion rod is movably sleeved inside the insertion hole.

[0035] In this embodiment, an arc-shaped door is symmetrically positioned on the outside of the tank 1, serving as the opening and closing component of the tank 1. When opened, it allows direct contact with and removal of the detachable molecular sieve assembly on the top of the base 4, facilitating the replacement of the molecular sieve inside the storage box 8. When closed, it forms a sealed space with the tank 1, preventing gas leakage during nitrogen production. A third spring is symmetrically fixed to the inside of the arc-shaped door, with an arc-shaped pressure plate fixed to the other end. This spring has elastic expansion and contraction characteristics. When the arc-shaped door is closed, the third spring is compressed by the arc-shaped door and the storage box 8, generating an elastic reaction force that pushes the arc-shaped pressure plate tightly against the outside of the storage box 8, thus pressing and fixing the storage box 8 to prevent it from shifting inside the tank 1 due to airflow impact or equipment vibration, ensuring the stability of the nitrogen production process. An L-shaped fixing rod is fixed to the outside of the arc-shaped door, with an insertion hole at the top. When the arc-shaped door is closed, the L-shaped fixing rod moves with the arc-shaped door. Below the U-shaped frame, the insertion hole at its top aligns with the insertion rod inside the U-shaped frame, allowing the insertion rod to be inserted and thus fixing the arc-shaped door to the tank 1. The U-shaped frame is fixed to the outside of the tank 1, providing installation and limiting space for the insertion rod, the circular plate, and the third spring. Its U-shaped structure guides the up-and-down movement of the insertion rod, preventing it from shifting and ensuring that the insertion rod is accurately aligned with the insertion hole at the top of the L-shaped fixing rod. The insertion rod is inserted into the top of the U-shaped frame, with the circular plate fixed at the top and the insertion hole for inserting the L-shaped fixing rod at the bottom. The side near the bottom is set with an angle. When the arc-shaped door is closed, the L-shaped fixing rod presses upward against the angle of the insertion rod, forcing the insertion rod to move upward and stretching the third spring. When the insertion hole aligns with the insertion rod, the third spring restores its elastic deformation, pushing the insertion rod downward into the insertion hole, locking the L-shaped fixing rod and the arc-shaped door. Pulling the circular plate upward can cause the insertion rod to disengage from the insertion hole, unlocking the arc-shaped door and enabling convenient opening and closing of the arc-shaped door.

[0036] In summary: When using this utility model, first manually pull the circular plate upwards. The circular plate drives the insertion rod upwards and stretches the third spring at the top of the U-shaped frame, allowing the insertion rod to disengage from the insertion hole at the top of the L-shaped fixing rod to unlock the arc-shaped door. Then, manually open the arc-shaped door and place the storage box 8 containing the molecular sieve on top of the base 4. The top rod 10 at the bottom of the storage box 8 passes through the movable hole 15 of the base 4. The top rod 10 presses the sealing plate 18, causing the second sealing ring 19 to disengage from the bottom of the base 4, thus opening the vent 6. At the same time, the first spring 13 in the mounting groove 12 at the top of the base 4 is compressed by the pressure of the storage box 8, pushing the first sealing ring 14 at the top of the mounting plate to tightly embed into the sealing groove 9 at the bottom of the storage box 8 to enhance the sealing performance. Finally, manually connect the threaded sleeve 11 at the top of the storage box 8 to the threaded connection of the conveying pipe. First, manually open the one-way valve on the outside of the delivery pipe, then manually close the arc-shaped door. The L-shaped fixing rod on the outside of the arc-shaped door moves to the bottom of the U-shaped frame with the arc-shaped door. The L-shaped fixing rod presses upward against the inclined surface of the insertion rod, forcing the insertion rod to move upward. When the insertion hole is aligned with the insertion rod, the third spring restores its elastic deformation, pushing the insertion rod downward into the insertion hole to lock the arc-shaped door. The third spring on the inside of the arc-shaped door is compressed and contracts, pushing the arc-shaped pressure plate to tightly fit against the outside of the storage box 8 and fix the storage box 8. Then, connect the motor 3 to the external power supply and start it. The motor 3 drives the turntable 20 at the output end to rotate around the output shaft. The turntable 20 drives the connecting rod 21 to reciprocate through the round rod. The connecting rod 21 drives the rectangular tube 22 at the bottom to reciprocate horizontally inside the filter box 2. The rectangular tube 22 passes through the filter box. One end of the rectangular tube 22 is connected to an external liquid pump and a purification reagent. The reagent is delivered to the top of the rectangular plate 23 through a flexible tube on one side of the rectangular tube 22, and then flows into the rectangular groove 24 at one end of the rectangular plate 23. The sealing plug in the rectangular groove 24 prevents reagent leakage. The reagent is discharged through the round holes on both sides of the rectangular groove 24, wetting the sponge plates 25 on both sides of the rectangular plate 23. At the same time, the reciprocating motion of the rectangular tube 22 drives the rectangular plate 23 to rotate around its own mounting axis, increasing the contact area between the sponge plate 25 and the air in the filter box 2. The sponge plate 25 adsorbs dust and other impurities in the air. The filtered air enters the filter box 2 through the air inlet pipe on one side of the filter box 2, and then flows upward through the vent 6 at the top of the base 4. The spiral blades 7 in the vent 6 slow down the airflow speed and guide the airflow, so that the air passes slowly and evenly through the bottom of the storage box 8. The air enters the storage box 8 through the inlet. The molecular sieve inside the storage box 8 separates nitrogen from the air. The separated nitrogen enters the delivery pipe through the connecting pipe at the top of the storage box 8, and finally through the threaded connection between the threaded sleeve 11 and the delivery pipe. When the molecular sieve needs to be replaced, since the components are symmetrically arranged with two detachable molecular sieve components, replacement can be achieved without stopping the machine. First, operate the arc-shaped door corresponding to one of the molecular sieves that needs to be replaced. After manually opening the arc-shaped door, manually close the one-way valve on the outside of the delivery pipe. Then, unscrew the threaded sleeve 11 on the outside of the connecting pipe at the top of the storage box 8 from the delivery pipe. Then, manually remove the storage box 8. After the top rod 10 at the bottom of the storage box 8 disengages from the sealing plate 18, the second spring 17 inside the U-shaped frame 16 returns to its elastic deformation.Pushing the sealing plate 18 upwards causes the second sealing ring 19 to fit tightly against the bottom of the base 4, sealing the vent 6 on that side to prevent unfiltered air from entering the tank 1. At this time, the molecular sieve assembly on the other side can produce nitrogen normally. After replacing the storage tank 8 with a new one containing the molecular sieve, repeat the above installation steps. The drain pipe at the bottom of the filter box 2 can be opened to discharge internal impurities when needed. The one-way valve on the outside of the drain pipe prevents external air or impurities from entering in reverse.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A molecular sieve assembly for a nitrogen generator, comprising a tank (1), characterized in that, A filter box (2) is fixedly installed at the bottom of the tank (1). A motor (3) is fixedly installed on one side of the filter box (2). An exhaust pipe is fixedly installed at the top of the tank (1). Two conveying pipes are symmetrically fixedly installed on the outside of the exhaust pipe. A base (4) is fixedly installed inside the tank (1) near the bottom. A partition plate (5) is fixedly installed inside the tank (1). Limiting plates are symmetrically fixedly installed on both sides of the partition plate (5). The bottom surface of the partition plate (5) is fixedly installed to the top of the base (4). Four movable holes (15) are symmetrically opened at the top of the base (4). Two detachable molecular sieve assemblies that are easy to replace are symmetrically arranged at the top of the base (4) and on both sides of the partition plate (5). Two sealing assemblies are symmetrically arranged at the bottom of the base (4) and inside the filter box (2). A filter assembly is arranged inside the filter box (2). The detachable molecular sieve assembly consists of a storage box (8) and a first sealing ring (14).

2. The molecular sieve assembly for a nitrogen generator according to claim 1, characterized in that, The detachable molecular sieve assembly includes a storage box (8), which is located on the top of the base (4). The bottom of the storage box (8) has several air inlets and a sealing groove (9). Two top rods (10) are symmetrically fixedly installed near the middle of the bottom of the storage box (8), and the top rods (10) pass through the movable hole (15).

3. A molecular sieve assembly for a nitrogen generator according to claim 2, characterized in that, The detachable molecular sieve assembly also includes a connecting pipe, which is fixedly installed on the top of the storage box (8). A threaded sleeve (11) is rotatably installed on the outer side of the connecting pipe near the top end. The threaded sleeve (11) is threadedly connected to the outer side of the conveying pipe near the bottom end.

4. A molecular sieve assembly for a nitrogen generator according to claim 3, characterized in that, The detachable molecular sieve assembly also includes an installation groove (12), which is located on the top of the base (4). A plurality of first springs (13) are fixedly installed on the bottom surface of the inner side of the installation groove (12). An installation plate is fixedly installed on the top of the plurality of first springs (13). A first sealing ring (14) is fixedly installed on the top of the installation plate. The first sealing ring (14) is movably fitted inside the sealing groove (9).

5. A molecular sieve assembly for a nitrogen generator according to claim 2, characterized in that, The sealing assembly includes two U-shaped frames (16), which are fixedly installed at the bottom of the base (4). A second spring (17) is fixedly installed on the inner bottom surface of the U-shaped frame (16). A sealing plate (18) is movably installed inside the two U-shaped frames (16). The bottom of the sealing plate (18) near one end is fixedly installed with the top of the second spring (17). A second sealing ring (19) is fixedly installed on the top of the sealing plate (18). The top rod (10) is used in conjunction with the sealing plate (18).

6. A molecular sieve assembly for a nitrogen generator according to claim 1, characterized in that, The filter assembly includes a turntable (20), which is fixedly installed at the output end of the motor (3). A connecting rod (21) is movably installed at the front end of the turntable (20) and near the side via a round rod. A rectangular tube (22) is fixedly installed at the bottom of the connecting rod (21). One end of the rectangular tube (22) passes through the filter box (2), and several flexible hoses are fixedly installed on one side of the rectangular tube (22).

7. A molecular sieve assembly for a nitrogen generator according to claim 6, characterized in that, The filter assembly also includes several rectangular plates (23), which are axially equidistantly rotatably installed inside the filter box (2). The top of the rectangular plates (23) is rotatably installed with the bottom of the rectangular tube (22). The other end of the hose is fixedly installed with the top of the rectangular plate (23). A rectangular groove (24) is opened at one end of the rectangular plate (23). The other end of the hose is connected to the rectangular groove (24). A sealing plug is fixedly installed inside the rectangular groove (24). Circular holes are symmetrically opened on both sides of the inside of the rectangular groove (24). Sponge plates (25) are fixedly installed on both sides of the rectangular plate (23).

8. A molecular sieve assembly for a nitrogen generator according to claim 1, characterized in that, Two arc-shaped doors are symmetrically arranged on the outer side of the tank (1). Two third springs are symmetrically fixedly installed on the inner side of the arc-shaped doors. An arc-shaped pressure plate is fixedly installed on the other end of the third spring. An L-shaped fixing rod is fixedly installed on the outer side of the arc-shaped doors. An insertion hole is opened at the top of the L-shaped fixing rod. Two U-shaped frames are fixedly installed on the outer side of the tank (1). An insertion rod is inserted into the top of the U-shaped frame. A circular plate is fixedly installed on the top of the insertion rod. A third spring is fixedly installed at the bottom of the circular plate. The other end of the third spring is fixedly installed with the top of the U-shaped frame. The side of the insertion rod near the bottom is set at an angle. The insertion rod is movably sleeved inside the insertion hole.

9. A molecular sieve assembly for a nitrogen generator according to claim 5, characterized in that, The top of the base (4) is symmetrically provided with several ventilation holes (6), and a spiral blade (7) is fixedly installed inside the ventilation holes (6).

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