CN217855190U

CN217855190U - Multistage output nitrogen making machine

Info

Publication number: CN217855190U
Application number: CN202222242201.5U
Authority: CN
Inventors: 陈钦松
Original assignee: Shanghai Weihang Equipment Technology Co ltd
Current assignee: Shanghai Weihang Equipment Technology Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-11-22
Anticipated expiration: 2032-08-24

Abstract

The utility model belongs to the technical field of the technique of system nitrogen machine and specifically relates to a system nitrogen machine of multistage output is related to, including air feed subassembly, the filter component that admits air, first pressure monitoring subassembly, pressure boost subassembly, the filter component that gives vent to anger, second pressure monitoring subassembly and a plurality of are used for exporting the output subassembly of the nitrogen gas of different atmospheric pressures, the beneficial effect of this application: the air feed subassembly provides nitrogen gas for the pressure boost, and the filter assembly that admits air and the filter assembly that gives vent to anger are arranged in impurity and the moisture of filtering in the nitrogen gas, and first pressure monitoring subassembly and second pressure monitoring subassembly are arranged in monitoring the nitrogen gas pressure value around the pressure boost, and the pressure boost subassembly carries out the pressure boost to nitrogen gas, and the output module is used for exporting the nitrogen gas of multiple different pressure, promotes the convenience of nitrogen generator, reduces the effect of the gas injection cost under the different situation.

Description

Multistage output nitrogen making machine

Technical Field

The application relates to the technical field of nitrogen making machines, in particular to a multistage output nitrogen making machine.

Background

Nitrogen is a colorless and tasteless gas, and the chemical property of the nitrogen is quite inactive, so that the nitrogen is widely applied to the industries of chemical industry, electronics, textile, coal, petroleum, natural gas, pipelines, machinery and the like, and the pressure of the nitrogen is strictly required in the process of injecting the nitrogen into an instrument.

The existing nitrogen making machine is usually used in a specific environment, the output end of the same nitrogen making machine only outputs nitrogen with single air pressure, the situation that the pressure change of the plateau environment is large is difficult to face, and when nitrogen is injected into instruments with different air pressure requirements, the nitrogen making machines with different output air pressures need to be replaced for gas injection operation, the operation of using a plurality of nitrogen making machines to deal with various situations is complex, the cost is high, and the problems need to be solved.

SUMMERY OF THE UTILITY MODEL

In order to promote the convenience of nitrogen generator, reduce the gas injection cost under the different situation, this application provides a nitrogen generator of multistage output, adopts following technical scheme:

the utility model provides a nitrogen generator of multistage output, includes air feed subassembly, the filter element that admits air, first pressure monitoring subassembly, pressure boost subassembly, the output subassembly of the nitrogen gas of giving vent to anger filter element, second pressure monitoring subassembly and a plurality of are used for exporting different atmospheric pressures, the inlet end of admitting air filter element is connected to the end of giving vent to anger of air feed subassembly, the inlet end of first pressure monitoring subassembly is connected to the end of giving vent to anger of filter element that admits air, the inlet end of pressure boost subassembly is connected to the end of giving vent to anger of first pressure monitoring subassembly, the inlet end of filter element is connected to the end of giving vent to anger of pressure boost subassembly, the end of giving vent to anger of filter element connects second pressure monitoring subassembly, first pressure monitoring subassembly and second pressure monitoring subassembly electric connection pressure boost subassembly, a plurality of output subassembly all connects in the end of giving vent to anger of second pressure monitoring subassembly.

Through adopting above-mentioned scheme, the air feed subassembly is used for providing the nitrogen gas of low pressure, nitrogen gas inputs and admits air the filter assembly and carries out the filtration of impurity and moisture, accomplish the first pressure monitoring subassembly of nitrogen gas input after the filtering operation and monitor, the operation person can observe the atmospheric pressure of nitrogen gas before the pressure boost through first pressure monitoring subassembly, pressure boost subassembly is used for carrying out the pressure boost to original nitrogen gas, and export the nitrogen gas after the pressure boost to the filter assembly of giving vent to anger, it is used for filtering moisture and the impurity of the nitrogen gas after the pressure boost to give vent to anger the filter assembly, second pressure monitoring subassembly is used for monitoring the pressure after the nitrogen gas pressure boost, and play the effect that makes the atmospheric pressure of nitrogen gas be no longer than the setting value, nitrogen gas after the pressure boost is carried respectively to a plurality of output assembly and is exported, output assembly decompresses the nitrogen gas after the pressure boost, make the nitrogen gas injection cost under the different situation, reach the effect that promotes the convenience of nitrogen generator.

Preferably, the nitrogen generator further comprises a gas storage assembly, the gas storage assembly is used for temporarily storing the pressurized nitrogen gas, and the gas storage assembly is connected between the first pressure monitoring assembly and the second pressure monitoring assembly.

By adopting the scheme, the gas storage assembly is used for storing the pressurized nitrogen gas and plays a role in standby, when the nitrogen gas of the gas supply assembly is used up or the pressurizing assembly stops working, the gas storage assembly can directly provide the pressurized nitrogen gas to be conveyed to the output assembly, and the effect of pre-storing the pressurized nitrogen gas is achieved.

Preferably, the first pressure monitoring assembly comprises a primary pressure gauge and a first pressure sensor, the primary pressure gauge is connected with the air outlet end of the air inlet filtering assembly, the primary pressure gauge is connected with the first pressure sensor, the first pressure sensor is connected with the air inlet end of the pressurizing assembly, and the first pressure sensor is electrically connected with the pressurizing assembly.

Through adopting above-mentioned scheme, elementary manometer is used for detecting the atmospheric pressure of nitrogen gas before the pressure boost, and pressure sensor discerns the atmospheric pressure of nitrogen gas after, pressure boost subassembly carries out the pressure boost to the nitrogen gas of current atmospheric pressure, and accurate pressure boost to required pressure value, reaches the effect that improves pressure boost subassembly pressure boost precision.

Preferably, the second pressure monitoring assembly comprises a second pressure sensor, a main ball valve and a primary safety valve for limiting the pressure of nitrogen output by the pressurizing assembly, the air inlet end of the primary safety valve is connected with the air inlet filtering assembly, the air outlet end of the primary safety valve is connected with the second pressure sensor, the second pressure sensor is connected with the main ball valve, and the second pressure sensor is electrically connected with the pressurizing assembly.

Through adopting above-mentioned scheme, elementary relief valve is used for restricting the pressure value of the nitrogen gas of pressure boost subassembly output, plays the effect of protection nitrogen generator, and second pressure sensor is used for discerning the pressure value of nitrogen gas behind the pressure boost, if the pressure value takes place undulantly, pressure boost subassembly in time adjusts the pressurization value, and whether total ball valve is used for controlling the gas after the pressure boost to export, reaches the effect of the nitrogen gas pressure value after the accurate monitoring pressure boost.

Preferably, the air feed subassembly includes a plurality of air feed bottle and a plurality of tee bend ball valve, the quantity of air feed bottle and tee bend ball valve is the same, the inlet end of tee bend ball valve is connected to the end of giving vent to anger of air feed bottle, the inlet end of filter component that admits air is connected to the end of giving vent to anger of tee bend ball valve, tee bend ball valve still is provided with the portion of emptying.

Through adopting above-mentioned scheme, the air feed bottle is used for depositing the nitrogen gas of initial pressure value to carry nitrogen gas to pressure boost subassembly, play the effect of air feed, the tee bend ball valve is used for opening and closes the air feed bottle, and when the nitrogen gas of air feed bottle is emitted to needs, the unloading portion is used for emitting nitrogen gas, reaches the effect that provides nitrogen gas for the pressure boost.

Preferably, the air inlet filtering assembly comprises a particle filter and at least two drying filters, the two drying filters are communicated, one end of each drying filter is connected with the air outlet end of the three-way ball valve, the other end of each drying filter is connected with one end of the particle filter, and the other end of each particle filter is connected with the primary pressure gauge.

Through adopting above-mentioned scheme, nitrogen gas will ensure relatively pureness at the in-process that uses, and drying filter is used for making nitrogen gas dry, reduces the moisture in the nitrogen gas, and particulate filter is arranged in cleaing away the particulate matter in the nitrogen gas for nitrogen gas is relatively pure, reaches the effect of filtering nitrogen gas.

Preferably, the output assembly comprises a pressure reducing valve, an air outlet safety valve, an air outlet pressure gauge and an air outlet ball valve, an air inlet end of the pressure reducing valve is connected with an air outlet end of the main ball valve, an air inlet end of the air outlet safety valve is connected with an air outlet end of the pressure reducing valve, the air outlet pressure gauge is connected with an air outlet end of the air outlet safety valve, and an air inlet end of the air outlet ball valve is connected with the air outlet pressure gauge.

Through adopting above-mentioned scheme, the relief pressure valve is used for making nitrogen gas pressure reduce to required pressure value after the pressure boost, and the relief valve of giving vent to anger is used for protecting output assembly, ensures that the nitrogen gas pressure after the decompression is not higher than the setting value of relief pressure valve, and the manometer of giving vent to anger is used for observing the pressure that nitrogen gas decompressed back process, and the ball valve of giving vent to anger is used for switching output assembly, reaches the effect of the nitrogen gas of the corresponding pressure value of output.

Preferably, the output assembly further comprises a pressure relief ball valve, and the air outlet end of the main ball valve is connected with the air inlet end of the pressure relief ball valve.

Through adopting above-mentioned scheme, too much when the nitrogen gas of pressure boost, when the apparatus of outside use nitrogen gas need not use, the nitrogen gas of total ball valve output discharges through the pressure release ball valve, reaches the effect of adjusting nitrogen gas volume inside the nitrogen generator.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the air supply assembly provides nitrogen gas needing pressurization, the air inlet filtering assembly filters the nitrogen gas input by the air supply assembly, the nitrogen gas is conveyed to the first pressure monitoring assembly, and the first pressure monitoring assembly is used for detecting a pressure value before pressurization of the nitrogen gas, so that the pressurization assembly accurately pressurizes the nitrogen gas according to the specific pressure value before pressurization.

2. The nitrogen gas after the pressure boost subassembly exports the filtering component of giving vent to anger and does further filtration, makes nitrogen gas keep relatively pure, and the second pressure monitoring subassembly limits the pressure value of the nitrogen gas after the pressure boost, and the too high condition of effective reduction pressure takes place, and the nitrogen gas pressure value after the second pressure monitoring subassembly detects the pressure boost, according to the pressure value change regulation pressure boost subassembly's pressurization value, transmits nitrogen gas to the output subassembly again and exports.

3. The output assembly of a plurality of different set pressure values outputs the nitrogen gas of different atmospheric pressures, reduces the gas injection cost under the different situation, promotes the convenience of nitrogen generator.

Drawings

Fig. 1 is a schematic structural diagram of a multi-output nitrogen generator according to an embodiment of the present disclosure.

Description of reference numerals: 1. a gas supply assembly; 11. an air supply bottle; 12. a three-way ball valve; 13. a venting portion; 2. an intake air filter assembly; 21. a particulate filter; 22. drying the filter; 3. a first pressure monitoring assembly; 31. a primary pressure gauge; 32. a first pressure sensor; 4. a pressurizing assembly; 5. an outlet gas filtering component; 6. a second pressure monitoring assembly; 61. a second pressure sensor; 62. a main ball valve; 63. a primary safety valve; 7. an output component; 71. a pressure reducing valve; 72. an air outlet safety valve; 73. an air outlet pressure gauge; 74. an air outlet ball valve; 75. a pressure relief ball valve; 8. a gas storage component; 100. a one-way valve.

Detailed Description

The present application is described in further detail below with reference to fig. 1.

The embodiment of the application discloses nitrogen generator of multistage output, refer to fig. 1, including air feed subassembly 1, filter module 2 that admits air, first pressure monitoring subassembly 3, pressure boost subassembly 4, filter module 5, the second pressure monitoring subassembly 6 and a plurality of output subassembly 7 of giving vent to anger. Air feed subassembly 1 is used for the storage to treat the nitrogen gas of pressure boost, and air feed subassembly 1 is connected and is admitted air filter assembly 2, and filter assembly 2 filters the nitrogen gas of input admitting air, makes nitrogen gas reduce impurity and moisture. First pressure monitoring subassembly 3 is carried to nitrogen gas after the filtration, and first pressure monitoring subassembly 3 carries out real-time measurement to the nitrogen gas that does not pressurize to adjust the pressure value of pressure boost subassembly 4 according to the pressure value of nitrogen gas, make nitrogen gas stable relatively be located the setting value, pressure boost subassembly 4 carries to the filter assembly 5 of giving vent to anger after with the nitrogen gas pressure boost and filters. The nitrogen gas after completing the pressurization and filtering is conveyed to the second pressure monitoring assembly 6 to be detected, the pressure value after the pressurization is obtained, the pressure value of the nitrogen gas is limited, and the nitrogen gas can not pass through when the pressure of the nitrogen gas is too high. The pressurized nitrogen is conveyed to a plurality of output assemblies 7 with different set values for decompression and then output, so that the nitrogen generator can output nitrogen with different pressure values.

The gas supply assembly 1 comprises a plurality of gas supply cylinders 11 and a plurality of three-way ball valves 12, and the number of the gas supply cylinders 11 and the number of the three-way ball valves 12 are the same. The gas supply bottle 11 and the three-way ball valve 12 are specifically provided with two, the gas outlet end of the gas supply bottle 11 is connected with the gas inlet end of the three-way ball valve 12, and the gas outlet ends of the two three-way ball valves 12 are connected with the gas inlet end of the gas inlet filtering component 2. The gas cylinder 11 is specifically, but not limited to, a nitrogen cylinder having a pressure of 0 to 15MPa and capable of storing 40L of nitrogen gas, and functions to supply the pressurizing assembly 4 with nitrogen gas, and the plurality of gas cylinders 11 can increase the total amount of gas supplied.

The three-way ball valve 12 is further provided with a vent part 13, and nitrogen in the gas supply bottle 11 can be released by opening the vent part 13 of the three-way ball valve 12, so that the nitrogen can be discharged when not needed or too much.

The inlet air filter assembly 2 comprises a particle filter 21 and at least two dry filters 22, wherein the two dry filters 22 are communicated and used for enhancing the drying capacity of the nitrogen and removing moisture in the nitrogen. One end of the drying filter 22 is connected with the air outlet end of the three-way ball valve 12, the other end of the drying filter 22 is connected with one end of the particle filter 21, the other end of the particle filter 21 is connected with the first pressure monitoring assembly 3, and the particle filter 21 is used for filtering particles of nitrogen, so that the nitrogen keeps relatively pure, and the influence of impurities existing in the nitrogen on the use of instruments is reduced.

Specifically, the inlet end of the dry filter 22 and the outlet end of the particulate filter 21 are both connected to the check valve 100, so that nitrogen gas can only flow from the gas supply module 1 to the inlet filter module 2 to the first pressure monitoring module 3.

First pressure monitoring subassembly 3 includes primary manometer 31 and first pressure sensor 32, and the end of giving vent to anger of filter component 2 is admitted air in the connection of primary manometer 31, and primary manometer 31 is used for detecting the nitrogen gas pressure value before the pressure boost, and the operating personnel acquires pressure value information through primary manometer 31. The primary pressure gauge 31 is connected with a first pressure sensor 32, the first pressure sensor 32 is connected with the air inlet end of the pressurizing assembly 4, the first pressure sensor 32 is electrically connected with the pressurizing assembly 4, and the pressure value measured by the first pressure sensor 32 is used for adjusting the pressurizing value of the pressurizing assembly 4. The pressurization value is specifically the value of the increased pressure of the pressurization assembly 4 on the non-pressurized nitrogen gas, so that the nitrogen gas is added to the set pressure value.

Supercharging component 4 specifically adopts the booster pump of air compressor machine pressure boost for carry out the pressure boost to nitrogen gas, after supercharging component 4 accomplished the pressure boost operation to nitrogen gas, nitrogen gas was carried to the filter module 5 of giving vent to anger and is filtered.

Specifically, the booster pump boosts the initial nitrogen gas to 35MPa and outputs it to the next stage.

The composition structure of the outlet gas filtering component 5 is the same as that of the inlet gas filtering component 2, and both the outlet gas filtering component and the inlet gas filtering component are composed of a particle filter 21 and a dry filter 22, and the outlet end of the pressurizing component 4 is connected with the particle filter 21 after being connected with the two dry filters 22. Impurities are easy to exist in the nitrogen after passing through the booster pump, and the air outlet filtering component 5 plays a role in filtering the nitrogen.

Specifically, the inlet end of filter-drier 22 is provided with check valve 100, so that nitrogen can only flow from pressurizing assembly 4 to outlet filtering assembly 5, thereby reducing the occurrence of recontamination of filtered nitrogen.

The second pressure monitoring assembly 6 includes a second pressure sensor 61, a main ball valve 62 and a primary pressure relief valve 63. The air inlet end of the primary safety valve 63 is connected with the air outlet end of the particle filter 21, and the primary safety valve 63 is a valve for limiting the nitrogen gas with the pressure of 35MPa from passing through, so that the nitrogen gas with the pressure higher than 35MPa cannot pass through, the function of protecting the internal structure of the nitrogen generator is achieved, and the burden of a machine is reduced. The inlet end of the second pressure sensor 61 is connected with the outlet end of the primary safety valve 63, and is used for detecting the pressure of the pressurized nitrogen in real time, and if the pressure fluctuates obviously, the pressurizing value of the pressurizing assembly 4 is adjusted, so that the nitrogen is stably pressurized to 35MPa. The inlet end of the main ball valve 62 is connected with the outlet end of the second pressure sensor 61, and the main ball valve 62 is used for controlling whether the pressurized nitrogen is transmitted to the next stage.

And a gas storage component 8 is connected between the second pressure sensor 61 and the primary pressure gauge 31, and the gas storage component 8 is a large-capacity gas storage tank provided with a valve and used for selectively storing pressurized nitrogen and playing a role in standby. And one side of the air outlet end of the air storage component 8 is connected with a one-way valve 100, so that nitrogen can be only conveyed to the primary pressure gauge 31 from one side of the second pressure sensor 61.

The plurality of groups of output assemblies 7 respectively comprise a pressure reducing valve 71, an air outlet safety valve 72, an air outlet pressure gauge 73 and an air outlet ball valve 74, wherein the air inlet end of the pressure reducing valve 71 is connected with the air outlet end of the main ball valve 62, so that pressurized nitrogen is conveyed to the pressure reducing valve 71 after the main ball valve 62 is opened, and the pressure reducing valve 71 reduces the pressure of the nitrogen. The air inlet end of the air outlet safety valve 72 is connected with the air outlet end of the pressure reducing valve 71, and the nitrogen which is decompressed to the set pressure value limits air pressure through the air outlet safety valve 72, so that the effect of ensuring that the nitrogen is not higher than the set air pressure value is achieved. The air outlet pressure gauge 73 is connected with the air outlet end of the air outlet safety valve 72 and used for detecting the current air pressure of the nitrogen, so that an operator can observe the air pressure of the nitrogen more intuitively. The inlet end of the outlet ball valve 74 is connected with an outlet pressure gauge 73, and the outlet ball valve 74 is opened as required so as to output the nitrogen with the current air pressure value for use.

In particular, the output assembly 7 can, but is not limited to, be able to output nitrogen at pressure values of 15MPa, 21.7MPa, 29MPa and 35MPa. When 15MPa of nitrogen is required to be output, the set pressure value of the pressure reducing valve 71 is 15MPa, so that after 35MPa of nitrogen passes through the pressure reducing valve 71, the pressure value of the nitrogen is reduced to 15MPa, the air outlet safety valve 72 is correspondingly set to be the limiting air pressure of 15MPa, and the 15MPa output assembly 7 can output the nitrogen with the pressure value of 15 MPa. The multiple sets of output assemblies 7 are all communicated with the air outlet end of the main ball valve 62, and when nitrogen with a certain air pressure value needs to be used, the air outlet ball valve 74 is opened, so that the current output assemblies 7 are operated to reduce pressure.

In one embodiment, the output assembly 7 outputting 35MPa does not need to be provided with a corresponding pressurization valve and an air outlet safety valve 72, and nitrogen gas is pressurized and then output to the outside through the main ball valve 62, a corresponding air outlet pressure gauge 73 and an air outlet ball valve 74.

The output assembly 7 further comprises a pressure relief ball valve 75, and the air outlet end of the main ball valve 62 is connected with the air inlet end of the pressure relief ball valve 75. When nitrogen gas generated too much and did not need to use, release nitrogen gas through opening pressure release ball valve 75, played the effect of quick empty nitrogen gas.

The principle of the embodiment of the application is as follows: air feed subassembly 1 provides the nitrogen gas of initial pressure value for follow-up pressure boost operation, nitrogen gas filters impurity and moisture through the filter assembly 2 that admits air, accomplish nitrogen gas after the filtration and monitor through first pressure monitoring subassembly 3, pressure boost subassembly 4 carries out the pressure boost to nitrogen gas according to first pressure monitoring subassembly 3's data, make nitrogen gas pressure boost to export to the filter assembly 5 of giving vent to anger after 35MPa and filter, accomplish second pressure monitoring subassembly 6 behind the filter operation and monitor nitrogen gas, and restrict the pressure value of nitrogen gas, export the output 7 of reducing pressure to different output assembly at last, reach the gas injection cost that reduces under the different situation, promote the effect of the convenience of nitrogen generator.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a nitrogen generator of multistage output, its characterized in that, is used for exporting output module (7) of the nitrogen gas of different atmospheric pressures including air feed subassembly (1), filter pack (2), first pressure monitoring subassembly (3), pressure boost subassembly (4), the filter pack (5), second pressure monitoring subassembly (6) and a plurality of giving vent to anger, the inlet end of air feed subassembly (2) is connected to the end of giving vent to anger of air feed subassembly (1), the inlet end of first pressure monitoring subassembly (3) is connected to the end of giving vent to anger of filter pack (2) that admits air, the inlet end of pressure boost subassembly (4) is connected to the end of giving vent to anger of first pressure monitoring subassembly (3), the inlet end of filter pack (5) is connected to the end of giving vent to anger of pressure boost subassembly (4), the end of giving vent to anger of filter pack (5) is connected second pressure monitoring subassembly (6), first pressure monitoring subassembly (3) and second pressure monitoring subassembly (6) electric connection pressure boost subassembly (4), a plurality of giving vent to anger output subassembly (7) all connect in the end of second pressure monitoring subassembly (6).

2. The nitrogen generator with multi-output according to claim 1, further comprising a gas storage component (8), wherein the gas storage component (8) is used for temporarily storing the pressurized nitrogen gas, and the gas storage component (8) is connected between the first pressure monitoring component (3) and the second pressure monitoring component (6).

3. The multi-output nitrogen making machine according to claim 1, wherein the first pressure monitoring assembly (3) comprises a primary pressure gauge (31) and a first pressure sensor (32), the primary pressure gauge (31) is connected to the air outlet end of the air inlet filtering assembly (2), the primary pressure gauge (31) is connected to the first pressure sensor (32), the first pressure sensor (32) is connected to the air inlet end of the pressure boosting assembly (4), and the first pressure sensor (32) is electrically connected to the pressure boosting assembly (4).

4. The nitrogen generator with multi-output according to claim 1, wherein the second pressure monitoring assembly (6) comprises a second pressure sensor (61), a main ball valve (62) and a primary safety valve (63) for limiting the pressure of nitrogen output by the pressure boost assembly (4), the gas inlet end of the primary safety valve (63) is connected with the gas inlet filtering assembly (2), the gas outlet end of the primary safety valve (63) is connected with the second pressure sensor (61), the second pressure sensor (61) is connected with the main ball valve (62), and the second pressure sensor (61) is electrically connected with the pressure boost assembly (4).

5. The nitrogen making machine with multi-stage output according to claim 3, characterized in that the gas supply assembly (1) comprises a plurality of gas supply bottles (11) and a plurality of three-way ball valves (12), the number of the gas supply bottles (11) and the number of the three-way ball valves (12) are the same, the gas outlet end of the gas supply bottle (11) is connected with the gas inlet end of the three-way ball valve (12), the gas outlet end of the three-way ball valve (12) is connected with the gas inlet end of the gas inlet filter assembly (2), and the three-way ball valve (12) is further provided with a vent part (13).

6. The nitrogen generator with multi-stage output according to claim 5, wherein the air inlet filtering assembly (2) comprises a particle filter (21) and at least two drying filters (22), two drying filters (22) are communicated, one end of each drying filter (22) is connected with the air outlet end of the three-way ball valve (12), the other end of each drying filter (22) is connected with one end of the particle filter (21), and the other end of each particle filter (21) is connected with the primary pressure gauge (31).

7. The nitrogen making machine with multi-stage output according to claim 4, wherein the output assembly (7) comprises a pressure reducing valve (71), an air outlet safety valve (72), an air outlet pressure gauge (73) and an air outlet ball valve (74), an air inlet end of the pressure reducing valve (71) is connected with an air outlet end of the main ball valve (62), an air inlet end of the air outlet safety valve (72) is connected with an air outlet end of the pressure reducing valve (71), the air outlet pressure gauge (73) is connected with an air outlet end of the air outlet safety valve (72), and an air inlet end of the air outlet ball valve (74) is connected with the air outlet pressure gauge (73).

8. The nitrogen generator with multi-level output according to claim 4, wherein the output assembly (7) further comprises a pressure relief ball valve (75), and the air outlet end of the main ball valve (62) is connected with the air inlet end of the pressure relief ball valve (75).