Low-cost nitrogen preparation device

Abstract

The utility model discloses a low-cost nitrogen preparation device. The low-cost nitrogen preparation device comprises an air compressor, an air inlet pipe, a three-position five-way electromagnetic valve, a left reaction tank and a right reaction tank, an air outlet end of the air compressor is connected with one end of the air inlet pipe, the other end of the air inlet pipe is connected with an air inlet of the three-position five-way electromagnetic valve, a left circulating port of the three-position five-way electromagnetic valve is connected with one end of the left circulating pipe, and the other end of the left circulating pipe is connected with the left reaction tank; a right circulating port of the three-position five-way electromagnetic valve is connected with one end of a right circulating pipe, and the other end of the right circulating pipe is connected with the right reaction tank. According to the device, nitrogen is extracted from air for preparation, the acquisition channel is easier, the source is very wide, the cost of raw materials is lower, the preparation is simple, the operation is convenient, the labor cost is lower, the nitrogen generated by the device is used for euthanasia, a dead object is an experimental mouse, very high purity is not needed, and the device is suitable for industrial production. And the requirement on equipment is low, so that the equipment cost is very low.

Description

Technical Field

[0001] The utility model relates to an improvement in the technology for preparing euthanasia gas for experimental animals, belonging to the field of experimental animals, and particularly relates to a low-cost nitrogen preparation device. Background Art

[0002] Euthanasia of experimental animals refers to a humane treatment method for experimental animals when a scientific experiment ends or needs to be terminated, so as to avoid unnecessary pain and suffering of the animals. Usually, it is carried out for terminating the experiment, ending the animal's pain or achieving the research purpose; this treatment method usually uses specific methods or drugs to quickly and painlessly end the life of the experimental animal; the purpose of euthanasia is to ensure that the experimental animal is respected and treated decently at the last moment, while minimizing the pain and anxiety of the experimental animal. At present, most euthanasia methods adopt carbon dioxide asphyxiation method and anesthesia method, which are costly and difficult to obtain. At present, nitrogen has been used for euthanasia, but most of the current nitrogen preparation equipment is relatively complex, has requirements for the purity of nitrogen preparation, and the preparation cost is relatively high.

[0003] The Chinese patent application with the application number CN202120898303.5 and the application date of April 25, 2021 discloses a nitrogen preparation device, which relates to the technical field of preparation of electronic high-purity auxiliary materials. The nitrogen preparation device includes an air purification unit, a pressure swing adsorption unit and a carbon-added deoxidation unit. The air purification unit is connected to the pressure swing adsorption unit, and the pressure swing adsorption unit is connected to the carbon-added deoxidation unit; the pressure swing adsorption unit includes an adsorption tower, and an adsorbent is placed in the adsorption tower; the carbon-added deoxidation unit includes a deoxidizer, and a carbon catalyst is placed in the deoxidizer. The nitrogen preparation device proposed in the embodiment of the utility model can simultaneously produce nitrogen with different purities such as instrument air, low-purity nitrogen and high-purity nitrogen, meeting the gas use requirements of users for nitrogen with different purities. At the same time, the yields of instrument air, low-purity nitrogen and high-purity nitrogen can be coordinated and supplemented with each other, so that the nitrogen resources can be utilized to the greatest extent. However, the above technology does not solve the problem of high cost of existing nitrogen preparation. Summary of the Invention

[0004] The purpose of the utility model is to overcome the problem of high cost of nitrogen preparation in the prior art, and provide a low-cost nitrogen preparation device with a relatively low nitrogen preparation cost.

[0005] To achieve the above purpose, the technical solution of the utility model is: a low-cost nitrogen preparation device, the low-cost nitrogen preparation device includes an air compressor, an air inlet pipe, a three-position five-way solenoid valve, a left reaction tank and a right reaction tank;

[0006] The air outlet end of the air compressor is connected to one end of the intake pipe, the other end of the intake pipe is connected to the air inlet of the five-port three-position solenoid valve, the left circulation port of the five-port three-position solenoid valve is connected to one end of the left circulation pipe, the other end of the left circulation pipe is connected to the left reaction tank, the right circulation port of the five-port three-position solenoid valve is connected to one end of the right circulation pipe, and the other end of the right circulation pipe is connected to the right reaction tank.

[0007] The air inlet of the five-port three-position solenoid valve is threadedly connected with a filtering mechanism;

[0008] The filtering mechanism includes a top ring, a filtering ring and a bottom ring. The outer circumference of the top ring is threadedly connected to the air inlet. A filter screen is arranged inside the circumference of the top ring. The bottom of the top ring is connected to the top of the filtering ring, the bottom of the filtering ring is connected to the top of the bottom ring, and a plurality of filtering holes are arranged on the side surface of the filtering ring. The plurality of filtering holes are evenly distributed in a ring shape on the side circumference of the filtering ring.

[0009] A collecting mechanism is arranged on the outer circumference of the filtering mechanism, and the collecting mechanism is threadedly connected to the air inlet.

[0010] The collecting mechanism includes a collecting tray and a side circumferential collecting plate. The inner ring of the collecting tray is threadedly connected to the outer circumference of the top ring;

[0011] The top of the collecting tray is connected to the bottom of the annular side circumferential collecting plate, and the outer circumference of the side circumferential collecting plate is threadedly connected to the air inlet;

[0012] The area between the collecting tray, the side circumferential collecting plate and the top ring is the collecting area.

[0013] The top of the top ring is provided with an inclined surface inclined towards the collecting area, and the longitudinal section of the side circumferential collecting plate is conical, and its length from the top to the bottom shows an increasing trend.

[0014] The five-port three-position solenoid valve includes a housing. A chute is opened inside the housing, and a valve core is slidably fitted in the chute;

[0015] One end of the left end of the valve core is connected to one end of the left spring coil, and one end of the right end of the valve core is connected to one end of the right spring coil;

[0016] A left coil housing is installed on the left side of the housing. A left electromagnetic coil is arranged inside the left coil housing, and the left electromagnetic coil is magnetically connected to the left spring coil. A right coil housing is installed on the right side of the housing. A right electromagnetic coil is arranged inside the right coil housing, and the right electromagnetic coil is magnetically connected to the right spring coil.

[0017] The valve core includes a first valve core column, a second valve core column, a third valve core column and a valve shaft. The first valve core column, the second valve core column and the third valve core column are connected by the valve shaft, and the first valve core column, the second valve core column and the third valve core column are all slidably connected to the chute.

[0018] The left side of the first valve core column is connected to the right side of the left connection end, and the left side of the left connection end is connected to the right side of the left spring coil;

[0019] The right end of the third valve core column is connected to the left side of the right connection end, and the right side of the right connection end is connected to the left side of the right spring coil.

[0020] The diameters of the first valve core column, the second valve core column, and the third valve core column are the same, the diameters of the left connection end and the right connection end are the same, the diameter of the first valve core column is greater than the diameter of the left connection end, the left connection end is greater than the diameter of the valve shaft, and there is a gas flow area between the valve shaft and the chute.

[0021] On the left and right sides inside the housing, a left empty groove and a right empty groove are respectively provided. The left spring coil is arranged in the left empty groove, and a left connecting plate is arranged between the left spring coil and the left connection end;

[0022] The right spring coil is arranged in the right empty groove, and a right connecting plate is arranged between the right spring coil and the right connection end.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] 1. In a low-cost nitrogen preparation device of the present utility model, the air outlet end of the air compressor is connected to one end of the air inlet pipe, the other end of the air inlet pipe is connected to the air inlet of the three-position five-way solenoid valve, the left circulation port of the three-position five-way solenoid valve is connected to one end of the left circulation pipe, the other end of the left circulation pipe is connected to the left reaction tank, the right circulation port of the three-position five-way solenoid valve is connected to one end of the right circulation pipe, and the other end of the right circulation pipe is connected to the right reaction tank. During application, this device extracts nitrogen from the air for preparation. The acquisition channel is easier, the source is very extensive, the cost of raw materials is lower, the preparation is simple, the operation is convenient, and the labor cost is also lower. And the nitrogen generated by this device is used for euthanasia, and the objects to be euthanized are the experimental mice, and high purity is not required, and the requirements for the equipment are also lower, so the equipment cost is very low. Therefore, nitrogen acquisition by the present utility model is more convenient and the cost is low.

[0025] 2. In a low-cost nitrogen preparation device of the present utility model, using this device to prepare nitrogen is a cyclic process and can be continuously prepared in a cycle. And the nitrogen can be recycled and reused after being used in the process of euthanizing experimental animals. Recycling and reusing nitrogen can also reduce the laboratory operation cost, improve the resource utilization efficiency, reduce the impact on the environment, and realize the sustainable utilization of resources. Therefore, the present utility model improves the resource utilization rate and reduces energy consumption.

[0026] 3. In a low-cost nitrogen preparation device of the present utility model, the air inlet of the three-position five-way solenoid valve is threadedly connected with a filtering mechanism. The filtering mechanism includes a top ring, a filtering ring and a bottom ring. The outer circumference of the top ring is threadedly connected with the air inlet, and a filter screen is arranged inside the top ring. The bottom of the top ring is connected to the top of the filtering ring, and the bottom of the filtering ring is connected to the top of the bottom ring. A plurality of filtering holes are arranged on the side of the filtering ring. During application, when compressed air enters the housing from the air inlet, impurities in the gas will be blocked in the area between the filtering ring and the bottom ring. The filtering ring is made of a material with a certain magnetic property, which can adsorb some particulate matters. The filter screen on the side of the filtering ring can improve the efficiency of air entry, and the arc-shaped design with a certain length can extend the time for air to pass through, so as to make the adsorption effect better, thereby preventing impurities or particulate matters from entering the three-position five-way solenoid valve and affecting its use, and improving the safety of use. Therefore, the present utility model can adsorb particulate impurities and is safer to use.

[0027] 4. In a low-cost nitrogen preparation device of the present utility model, the collection mechanism includes a collection tray and a side enclosure collection plate. The inner ring of the collection tray is threadedly connected with the outer circumference of the top ring; the top of the collection tray is connected to the bottom of the annular side enclosure collection plate, and the outer circumference of the side enclosure collection plate is threadedly connected with the air inlet. During application, when some fine particles enter the three-position five-way solenoid valve, during the air circulation, the particles will fall onto the collection tray under the action of pressure. With the assistance of the inclined plane and the conical side enclosure collection plate, the particulate matters will fall onto the collection tray. When a certain amount is collected, the collection tray is rotated in the reverse direction, the collection mechanism is removed, and the corresponding impurities are poured out, so as to be reused. The collection mechanism can be recycled, and the threaded connection method makes the installation and disassembly more convenient. Therefore, the present utility model is convenient to use and has a good anti-blocking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the present utility model.

[0029] Figure 2 is a structural schematic diagram of the three-position five-way solenoid valve in the present utility model.

[0030] Figure 3 is a cross-sectional view of the three-position five-way solenoid valve in the present utility model.

[0031] Figure 4 is a structural schematic diagram of the valve core in the present utility model.

[0032] Figure 5 is a structural schematic diagram of the filtering mechanism in the present utility model.

[0033] Figure 6 is a bottom view of the filtering mechanism in the present utility model.

[0034] Figure 7 It is a schematic connection diagram of the collection mechanism and the filtering mechanism in the present utility model.

[0035] Figure 8 It is in the present utility model Figure 7 top view.

[0036] Figure 9 It is a schematic structural diagram of the collection mechanism in the present utility model.

[0037] In the figure: air compressor 1, intake pipe 2, five-way three-position solenoid valve 3, housing 31, left circulation port 32, right circulation port 33, left air outlet 34, intake port 35, right air outlet 36, chute 37, valve core 38, right connection end 381, one valve core column 382, valve shaft 383, two valve core columns 384, three valve core columns 385, right connection end 386, gas circulation area 39, left coil housing 310, left electromagnetic coil 311, left connecting plate 312, left spring coil 313, right coil housing 314, right electromagnetic coil 315, right spring coil 316, right connecting plate 317, left empty slot 318, right empty slot 319, left circulation pipe 4, right circulation pipe 41, left reaction tank 5, right reaction tank 51, filtering mechanism 6, top ring 61, filter screen 62, filter ring 63, filter holes 64, bottom ring 65, inlet 66, inclined surface 67, collection mechanism 7, collection tray 71, side wall collection plate 72, collection area 73. Specific embodiments

[0038] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] See Figures 1 to 9 , a low-cost nitrogen preparation device, the low-cost nitrogen preparation device includes an air compressor 1, an intake pipe 2, a five-way three-position solenoid valve 3, a left reaction tank 5 and a right reaction tank 51;

[0040] The air outlet end of the air compressor 1 is connected to one end of the intake pipe 2, the other end of the intake pipe 2 is connected to the intake port 35 of the five-way three-position solenoid valve 3, the left circulation port 32 of the five-way three-position solenoid valve 3 is connected to one end of the left circulation pipe 4, the other end of the left circulation pipe 4 is connected to the left reaction tank 5, the right circulation port 33 of the five-way three-position solenoid valve 3 is connected to one end of the right circulation pipe 41, and the other end of the right circulation pipe 41 is connected to the right reaction tank 51.

[0041] The intake port 35 of the five-way three-position solenoid valve 3 is threadedly connected with a filtering mechanism 6;

[0042] The filtering mechanism 6 includes a top ring 61, a filtering ring 63 and a bottom ring 65. The outer circumference of the top ring 61 is threadedly connected to the air inlet 35. A filter screen 62 is arranged on the inner circumference of the top ring 61. The bottom of the top ring 61 is connected to the top of the filtering ring 63. The bottom of the filtering ring 63 is connected to the top of the bottom ring 65. A plurality of filtering holes 64 are arranged on the side surface of the filtering ring 63, and the plurality of filtering holes 64 are evenly distributed in a ring shape on the side circumference of the filtering ring 63.

[0043] A collecting mechanism 7 is arranged on the outer circumference of the filtering mechanism 6, and the collecting mechanism 7 is threadedly connected to the air inlet 35.

[0044] The collecting mechanism 7 includes a collecting tray 71 and a side circumferential collecting plate 72. The inner ring of the collecting tray 71 is threadedly connected to the outer circumference of the top ring 61;

[0045] The top of the collecting tray 71 is connected to the bottom of the annular side circumferential collecting plate 72, and the outer circumference of the side circumferential collecting plate 72 is threadedly connected to the air inlet 35;

[0046] The area between the collecting tray 71, the side circumferential collecting plate 72 and the top ring 61 is the collecting area 73.

[0047] The top of the top ring 61 is provided with an inclined surface 67 inclined towards the collecting area 73. The longitudinal section of the side circumferential collecting plate 72 is conical, and its length from the top to the bottom shows an increasing trend.

[0048] The three-position five-way solenoid valve 3 includes a housing 31. A chute 37 is opened inside the housing 1, and a spool 38 is slidably fitted in the chute 37;

[0049] The left end of the spool 38 is connected to one end of a left spring coil 313, and the right end of the spool 38 is connected to one end of a right spring coil 316;

[0050] A left coil housing 310 is installed on the left side of the housing 31. A left electromagnetic coil 311 is arranged inside the left coil housing 310, and the left electromagnetic coil 311 is magnetically connected to the left spring coil 313. A right coil housing 314 is installed on the right side of the housing 1. A right electromagnetic coil 315 is arranged inside the right coil housing 314, and the right electromagnetic coil 315 is magnetically connected to the right spring coil 316.

[0051] The spool 38 includes a first spool column 382, a second spool column 384, a third spool column 385 and a valve shaft 383. The first spool column 382, the second spool column 384 and the third spool column 385 are connected by the valve shaft 383, and the first spool column 382, the second spool column 384 and the third spool column 385 are all slidably connected to the chute 37.

[0052] The left side of the first spool column 382 is connected to the right side of a left connection end 381, and the left side of the left connection end 381 is connected to the right side of the left spring coil 313;

[0053] The right end of the three-valve spool 385 is connected to the left side of the right connection end 386, and the right side of the right connection end 381 is connected to the left side of the right spring ring 316.

[0054] The diameters of the first valve spool 382, the second valve spool 384, and the three-valve spool 385 are the same. The diameters of the left connection end 381 and the right connection end 386 are the same. The diameter of the first valve spool 382 is larger than that of the left connection end 381, and the left connection end 381 is larger than the diameter of the valve shaft 383. There is a gas flow area 39 between the valve shaft 383 and the chute 37.

[0055] On the left and right sides inside the housing 31, a left empty groove 318 and a right empty groove 319 are respectively provided. The left spring ring 313 is arranged in the left empty groove 318, and a left connecting plate 312 is arranged between the left spring ring 313 and the left connection end 381;

[0056] The right spring ring 316 is arranged in the right empty groove 319, and a right connecting plate 317 is arranged between the right spring ring 316 and the right connection end 386.

[0057] The principle of the present utility model is described as follows: First, air enters the air compressor 1 for compression. The compressed air enters the three-position five-way solenoid valve 3 through the intake pipe 2. The three-position five-way solenoid valve 3 is communicated with the left reaction tank 5 through the left circulation pipe 4 and with the right reaction tank 51 through the right circulation pipe 41. The left electromagnetic coil 311 is energized, and the right electromagnetic coil 315 is not energized. At this time, the valve core 38 moves to the right, the left spring ring 313 is stretched, and the right spring ring 316 is compressed. The channel between the left circulation port 32 and the intake port 35 is opened. The compressed air flows into the left circulation pipe 4 after passing through the intake port 35, the gas flow area 39, and the left circulation port 32 in sequence. When the compressed air enters the left reaction tank 5, the high-pressure oxygen is adsorbed by the carbon molecular sieve in the left reaction tank 5, and the remaining nitrogen is collected. After the nitrogen collection is completed, the right electromagnetic coil 315 is energized, and the left electromagnetic coil 311 is not energized. At this time, the valve core 38 moves to the left, the left spring ring 313 is compressed, and the right spring ring 316 is stretched. At this time, the pressure in the left reaction tank 5 decreases, and the oxygen adsorbed on the carbon molecular sieve is desorbed. The gas remaining in the left reaction tank 5 is discharged through the left air outlet 34. At the same time, the compressed air enters the right reaction tank 51 through the intake port 35, the gas flow area 39, and the right circulation port 33 through the right circulation pipe 41 for reaction. The reaction process is the same as that in the left reaction tank 5, and the reaction cycles in sequence until an appropriate amount of nitrogen is collected.

[0058] Example 1:

[0059] A low-cost nitrogen preparation device, the low-cost nitrogen preparation device includes an air compressor 1, an air inlet pipe 2, a three-position five-way solenoid valve 3, a left reaction tank 5 and a right reaction tank 51; the air outlet end of the air compressor 1 is connected to one end of the air inlet pipe 2, the other end of the air inlet pipe 2 is connected to the air inlet 35 of the three-position five-way solenoid valve 3, the left circulation port 32 of the three-position five-way solenoid valve 3 is connected to one end of the left circulation pipe 4, the other end of the left circulation pipe 4 is connected to the left reaction tank 5, the right circulation port 33 of the three-position five-way solenoid valve 3 is connected to one end of the right circulation pipe 41, and the other end of the right circulation pipe 41 is connected to the right reaction tank 51.

[0060] During application:

[0061] First, air enters the air compressor 1 for compression. The compressed air enters the three-position five-way solenoid valve 3 through the air inlet pipe 2. When the compressed air enters the left reaction tank 5 through the left circulation pipe 4, the high-pressure oxygen is adsorbed by the carbon molecular sieve in the left reaction tank 5, and the remaining nitrogen is collected. After the nitrogen collection is completed, the left air outlet 34 of the three-position five-way solenoid valve 3 is opened. At this time, the pressure in the left reaction tank 5 decreases, and the oxygen adsorbed on the carbon molecular sieve desorbs, discharging the air remaining in the left reaction tank 5 together. At the same time, the compressed air enters the right reaction tank 51 for reaction, and the reaction process is the same as that in the left reaction tank 5, and the reaction cycles in turn.

[0062] Example 2:

[0063] Example 2 is basically the same as Example 1, and the difference is:

[0064] A low-cost nitrogen preparation device, the filtering mechanism 6 includes a top ring 61, a filtering ring 63 and a bottom ring 65. The outer circumference of the top ring 61 is threadedly connected to the air inlet 35. A filter screen 62 is arranged on the inner circumference of the top ring 61. The bottom of the top ring 61 is connected to the top of the filtering ring 63. The bottom of the filtering ring 63 is connected to the top of the bottom ring 65. A plurality of filtering holes 64 are arranged on the side of the filtering ring 63, and the plurality of filtering holes 64 are evenly distributed in a ring shape on the side circumference of the filtering ring 63; a collection mechanism 7 is arranged on the outer circumference of the filtering mechanism 6, and the collection mechanism 7 is threadedly connected to the air inlet 35.

[0065] During application:

[0066] When the compressed air enters the three-position five-way solenoid valve 3 from the air inlet, the impurities in the gas will be blocked in the area between the filtering ring 63 and the bottom ring 65. The filtering ring 63 is made of a material with a certain magnetism, which can adsorb some particulate matter. The filter screen on the side of the filtering ring 63 can improve the efficiency of air entry, and the arc-shaped design with a certain length can extend the time for the air to pass through, so as to make the adsorption effect better.

[0067] Example 3:

[0068] Embodiment 3 is substantially the same as Embodiment 1, except that:

[0069] A low-cost nitrogen preparation device, the collecting mechanism 7 includes a collecting plate 71 and a side collecting plate 72, the inner ring of the collecting plate 71 is threadedly connected to the outer periphery of the top ring 61; the top of the collecting plate 71 is connected to the bottom of the annular side collecting plate 72, and the outer periphery of the side collecting plate 72 is threadedly connected to the air inlet 35; the area between the collecting plate 71, the side collecting plate 72 and the top ring 61 is a collecting area 73; the top of the top ring 61 is provided with an inclined surface 67 inclined toward the collecting area 73, the longitudinal section of the side collecting plate 72 is conical, and its length from the top to the bottom is in an increasing trend.

[0070] When applying:

[0071] When some fine particles enter the three-position five-way solenoid valve 3, during air circulation, the particles fall onto the collection tray 71 under the action of pressure, and with the assistance of the inclined surface 67 and the conical side collection plate 72, the particles fall onto the collection tray 71. When a certain amount is collected, the collection tray 71 is rotated in the opposite direction, the collection mechanism 7 is removed, and the corresponding impurities are poured out so that they can be reused. The collection mechanism 7 can be recycled, and the threaded connection makes installation and disassembly more convenient.

[0072] Embodiment 4:

[0073] Embodiment 4 is substantially the same as Embodiment 1, except that:

[0074] A low-cost nitrogen preparation device, the five-way three-position solenoid valve 3 includes a housing 31, a chute 37 is opened inside the housing 1, and a valve core 38 is slidably fitted in the chute 37; the left end of the valve core 38 is connected to one end of a left spring coil 313, and the right end of the valve core 38 is connected to one end of a right spring coil 316; a left coil housing 310 is installed on the left side of the housing 31, a left electromagnetic coil 311 is arranged inside the left coil housing 310, and the left electromagnetic coil 311 is magnetically connected to the left spring coil 313. A right coil housing 314 is installed on the right side of the housing 1, a right electromagnetic coil 315 is arranged inside the right coil housing 314, and the right electromagnetic coil 315 is magnetically connected to the right spring coil 316; the valve core 38 includes a first valve core column 382, a second valve core column 384, a third valve core column 385 and a valve shaft 383. The first valve core column 382, the second valve core column 384 and the third valve core column 385 are connected by the valve shaft 383, and the first valve core column 382, the second valve core column 384 and the third valve core column 385 are all slidably connected to the chute 37; the left side of the first valve core column 382 is connected to the right side of a left connection end 381, and the left side of the left connection end 381 is connected to the right side of the left spring coil 313; the right end of the third valve core column 385 is connected to the left side of a right connection end 386, and the right side of the right connection end 381 is connected to the left side of the right spring coil 316; the diameters of the first valve core column 382, the second valve core column 384 and the third valve core column 385 are the same, the diameters of the left connection end 381 and the right connection end 386 are the same, the diameter of the first valve core column 382 is greater than the diameter of the left connection end 381, the left connection end 381 is greater than the diameter of the valve shaft 383, and there is a gas flow area 39 between the valve shaft 383 and the chute 37; left empty slots 318 and right empty slots 319 are respectively opened on the left and right sides inside the housing 31. The left spring coil 313 is arranged in the left empty slot 318, and a left connecting plate 312 is arranged between the left spring coil 313 and the left connection end 381; the right spring coil 316 is arranged in the right empty slot 319, and a right connecting plate 317 is arranged between the right spring coil 316 and the right connection end 386.

[0075] During application:

[0076] When the left electromagnetic coil 311 is energized and the right electromagnetic coil 315 is not energized, the valve core 38 moves to the right at this time. The left spring coil 313 is stretched and the right spring coil 316 is compressed. The channel between the left circulation port 32 and the air inlet 35 is opened. The compressed air flows into the left circulation pipe 4 successively through the air inlet 35, the gas circulation area 39, and the left circulation port 32. When the compressed air enters the left reaction tank 5, the high-pressure oxygen is adsorbed by the carbon molecular sieve in the left reaction tank 5, and the remaining nitrogen is collected. After the nitrogen collection is completed, the right electromagnetic coil 315 is energized and the left electromagnetic coil 311 is not energized. At this time, the valve core 38 moves to the left. The left spring coil 313 is compressed and the right spring coil 316 is stretched. At this time, the pressure in the left reaction tank 5 decreases, and the oxygen adsorbed on the carbon molecular sieve is desorbed. The gas remaining in the left reaction tank 5 is discharged through the left air outlet 34. At the same time, the compressed air enters the right reaction tank 51 through the air inlet 35, the gas circulation area 39, and the right circulation port 33 through the right circulation pipe 41 for reaction. The reaction process is the same as that in the left reaction tank 5, and the reaction cycles successively.

[0077] The above description is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modification or change made by those of ordinary skill in the art according to the content disclosed by the present invention shall be included in the protection scope recorded in the claims.

Claims

1. A low-cost nitrogen preparation device, characterized in that: The low-cost nitrogen preparation device includes an air compressor (1), an air inlet pipe (2), a three-position five-way solenoid valve (3), a left reaction tank (5) and a right reaction tank (51). The air outlet end of the air compressor (1) is connected to one end of the air inlet pipe (2), the other end of the air inlet pipe (2) is connected to the air inlet (35) of the three-position five-way solenoid valve (3), the left circulation port (32) of the three-position five-way solenoid valve (3) is connected to one end of the left circulation pipe (4), the other end of the left circulation pipe (4) is connected to the left reaction tank (5), the right circulation port (33) of the three-position five-way solenoid valve (3) is connected to one end of the right circulation pipe (41), and the other end of the right circulation pipe (41) is connected to the right reaction tank (51).

2. The nitrogen preparation device with low cost according to claim 1, characterized in that: A filtering mechanism (6) is threadedly connected to the air inlet (35) of the three-position five-way solenoid valve (3). The filtering mechanism (6) includes a top ring (61), a filtering ring (63) and a bottom ring (65). The outer circumference of the top ring (61) is threadedly connected to the air inlet (35). A filter screen (62) is arranged inside the inner circumference of the top ring (61). The bottom of the top ring (61) is connected to the top of the filtering ring (63). The bottom of the filtering ring (63) is connected to the top of the bottom ring (65). A plurality of filtering holes (64) are arranged on the side of the filtering ring (63), and the plurality of filtering holes (64) are evenly distributed in a ring shape on the side circumference of the filtering ring (63).

3. The nitrogen preparation device with low cost according to claim 2, characterized in that: A collecting mechanism (7) is arranged on the outer circumference of the filtering mechanism (6), and the collecting mechanism (7) is threadedly connected to the air inlet (35).

4. The low-cost nitrogen preparation device according to claim 3, characterized in that: The collecting mechanism (7) includes a collecting tray (71) and a side circumferential collecting plate (72). The inner ring of the collecting tray (71) is threadedly connected to the outer circumference of the top ring (61). The top of the collecting tray (71) is connected to the bottom of the annular side circumferential collecting plate (72), and the outer circumference of the side circumferential collecting plate (72) is threadedly connected to the air inlet (35). The area between the collecting tray (71), the side circumferential collecting plate (72) and the top ring (61) is the collecting area (73).

5. A low-cost nitrogen preparation device according to claim 4, characterized in that: The top of the top ring (61) is provided with an inclined surface (67) inclined towards the collecting area (73). The longitudinal section of the side circumferential collecting plate (72) is conical, and its length from the top to the bottom shows an increasing trend.

6. The low-cost nitrogen preparation device according to claim 1, wherein: The three-position five-way solenoid valve (3) includes a housing (31). A sliding groove (37) is opened inside the housing (31), and a valve core (38) is slidably fitted in the sliding groove (37). The left end of the valve core (38) is connected to one end of a left spring coil (313), and the right end of the valve core (38) is connected to one end of a right spring coil (316). A left coil housing (310) is installed on the left side of the housing (31). A left electromagnetic coil (311) is arranged inside the left coil housing (310), and the left electromagnetic coil (311) is magnetically connected to the left spring coil (313). A right coil housing (314) is installed on the right side of the housing (31). A right electromagnetic coil (315) is arranged inside the right coil housing (314), and the right electromagnetic coil (315) is magnetically connected to the right spring coil (316).

7. A low-cost nitrogen preparation device according to claim 6, characterized in that: The spool (38) includes a first spool column (382), a second spool column (384), a third spool column (385) and a valve shaft (383). The first spool column (382), the second spool column (384) and the third spool column (385) are connected by the valve shaft (383), and the first spool column (382), the second spool column (384) and the third spool column (385) are all slidably connected to the chute (37).

8. A low-cost nitrogen preparation device according to claim 7, characterized in that: The left side of the first spool column (382) is connected to the right side of the left connection end (381), and the left side of the left connection end (381) is connected to the right side of the left spring ring (313); The right end of the third spool column (385) is connected to the left side of the right connection end (386), and the right side of the right connection end (386) is connected to the left side of the right spring ring (316).

9. The nitrogen preparation device with low cost according to claim 8, wherein: The diameters of the first spool column (382), the second spool column (384) and the third spool column (385) are the same, the diameters of the left connection end (381) and the right connection end (386) are the same, the diameter of the first spool column (382) is greater than the diameter of the left connection end (381), the left connection end (381) is greater than the diameter of the valve shaft (383), and there is a gas flow area (39) between the valve shaft (383) and the chute (37).

10. A low-cost nitrogen production device according to claim 9, characterized in that: On the left and right sides inside the housing (31), a left empty groove (318) and a right empty groove (319) are respectively formed. The left spring ring (313) is arranged in the left empty groove (318), and a left connecting plate (312) is arranged between the left spring ring (313) and the left connection end (381); The right spring ring (316) is arranged in the right empty groove (319), and a right connecting plate (317) is arranged between the right spring ring (316) and the right connection end (386).

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