CN112917005A - Method and equipment for adjusting nitrogen purity of laser cutting - Google Patents
Method and equipment for adjusting nitrogen purity of laser cutting Download PDFInfo
- Publication number
- CN112917005A CN112917005A CN202110368939.3A CN202110368939A CN112917005A CN 112917005 A CN112917005 A CN 112917005A CN 202110368939 A CN202110368939 A CN 202110368939A CN 112917005 A CN112917005 A CN 112917005A
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- gas
- nitrogen
- purity
- air
- valve
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 195
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 96
- 238000003698 laser cutting Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 118
- 239000003570 air Substances 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011261 inert gas Substances 0.000 claims abstract description 5
- 239000012528 membrane Substances 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims 8
- 230000001276 controlling effect Effects 0.000 claims 3
- 239000000203 mixture Substances 0.000 claims 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/1435—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow control means
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a nitrogen purity adjusting method and equipment for laser cutting, wherein the method comprises the following steps: supplying gas according to the gas consumption required by the gas consumption terminal; when the gas using terminal needs nitrogen, the nitrogen directly enters gas using equipment; when the gas terminal needs to mix gas, introducing decompressed gas, and filtering water, oil and dust impurities in the gas; drying the filtered gas by a membrane drying method; controlling the flow direction of the nitrogen, decompressing, mixing with the dried gas, and feeding into a gas using device. The invention determines the opening angle of the adjusting electric valve according to the set nitrogen purity, and controls the flow of gases such as air, oxygen, nitrogen, inert gas and the like entering the rear end to be mixed with the nitrogen by utilizing the opening angle of the adjusting electric valve, thereby realizing the adjustment and control of the nitrogen purity. The adjusting electric valve can adjust the angle at any time according to the comparison between the nitrogen purity and the set value, so that the purity is stabilized at the set value.
Description
Technical Field
The invention relates to the technical field of gas supply of laser cutting machines, in particular to a nitrogen purity adjusting method and nitrogen purity adjusting equipment for laser cutting.
Background
At present, a laser cutting machine is generally supplied by a liquid nitrogen source or a nitrogen source of a nitrogen making machine, and the purity of nitrogen of the gas source is relatively stable and generally in a high-purity stage. Because the nitrogen purity required when the laser cutting machine is used for cutting plates with different thicknesses and materials is different, the laser cutting machine has higher cutting efficiency and higher cutting quality after being matched with the laser cutting machine.
The existing equipment has no purity adjusting device, and the purity of an air source is the purity of a laser cutting machine terminal. This process cannot be adapted to different product requirements. And the purity of the nitrogen gas source used is basically stable and cannot match the change of related cutting products. Resulting in poor cutting efficiency of the product, poor cutting quality such as appearance, burrs, etc.
Disclosure of Invention
The invention aims to provide a nitrogen purity adjusting method and equipment for laser cutting, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a nitrogen purity adjusting method for laser cutting comprises the following steps:
supplying gas according to the gas consumption required by the gas consumption terminal;
when the gas using terminal needs nitrogen, the nitrogen directly enters gas using equipment;
when the gas terminal needs to mix gas, introducing decompressed gas, and filtering water, oil and dust impurities in the gas;
drying the filtered gas by a membrane drying method;
controlling the flow direction of the nitrogen, decompressing, mixing with the dried gas, and feeding into a gas using device.
Preferably, the nitrogen purity in the mixed gas is detected, the nitrogen purity is compared with a set value of the nitrogen purity, and the mixing flow of the dried gas and the nitrogen is controlled according to the comparison result, so that the adjustment and the control of the nitrogen purity are realized, and the set value is maintained.
Preferably, the gas introduced under reduced pressure includes, but is not limited to, air, nitrogen, oxygen, and inert gases.
In order to achieve the above purpose, the invention also provides the following technical scheme:
a laser-cut nitrogen purity adjustment apparatus, comprising:
the first gas path is connected with the gas terminal and is used for introducing nitrogen;
the second gas circuit is connected with the gas using terminal and used for introducing gas;
the tail ends of the first gas path and the second gas path are connected and used for mixing gas and nitrogen;
the nitrogen analyzer is connected with the second gas path and is used for detecting the purity of nitrogen in the mixed gas;
and the control system is connected with the nitrogen analyzer and used for controlling the flow of the introduced nitrogen according to the comparison between the detected nitrogen purity in the mixed gas and a set value, so that the adjustment and control of the nitrogen purity are realized and the set value is maintained.
Preferably, the first air path includes:
the electric three-way valve is connected with the gas using terminal through the three-way valve and is used for introducing nitrogen;
the second gas path includes:
an air electric valve connected with the filtering component and used for introducing air,
the filtering component is used for filtering water, oil and dust impurities in the gas and is connected with the air film pipe;
the air film pipe is used for drying air and is connected with the adjusting type electric valve;
and the adjusting electric valve is connected with the three-way valve and is used for introducing the mixed gas into a gas using terminal.
Preferably, the adjusting type electric valve is connected with a three-way valve through two one-way valves, the electric three-way valve is connected with a pipeline between the two one-way valves through a pressure reducing valve, and the air electric valve is connected with the filtering assembly through the pressure reducing valve.
Preferably, the nitrogen analyzer is connected to the line between the two one-way valves.
Preferably, the filtering component is a filter triple piece, and the control system is based on a PLC and respectively controls and connects the electric three-way valve, the air electric valve and the adjusting electric valve.
Compared with the prior art, the invention has the beneficial effects that:
the method can be independently manufactured into a standard product, the device can be arranged in a laser cutting machine, and the purpose that different products use nitrogen with different purities can be achieved by controlling a program as long as an air source is connected into the device, so that the cutting efficiency and the cutting quality are improved.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention.
In the figure: the device comprises an electric three-way valve 1, a three-way valve 2, a pressure reducing valve 3, a one-way valve 4, an air electric valve 5, a filtering assembly 6, an air membrane tube 7, an adjusting electric valve 8 and a nitrogen analyzer 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
referring to fig. 1 to 2, the present invention provides a technical solution:
a nitrogen purity adjusting method for laser cutting comprises the following steps:
supplying gas according to the gas consumption required by the gas consumption terminal;
when the gas using terminal needs nitrogen, the nitrogen directly enters gas using equipment;
when the gas terminal needs to mix gas, introducing decompressed gas, and filtering water, oil and dust impurities in the gas;
drying the filtered gas by a membrane drying method;
controlling the flow direction of the nitrogen, decompressing, mixing with the dried gas, and feeding into a gas using device.
And detecting the nitrogen purity in the mixed gas, comparing the detected nitrogen purity with a set value of the nitrogen purity, and controlling the mixing flow of the dried gas and the nitrogen according to the comparison result to realize the adjustment and control of the nitrogen purity and maintain the nitrogen purity at the set value. The gas for introducing reduced pressure can be air, nitrogen, oxygen or inert gas, etc.
A laser-cut nitrogen purity adjustment apparatus, comprising:
the first gas path is connected with the gas terminal and is used for introducing nitrogen;
the second gas circuit is connected with the gas using terminal and used for introducing gas;
the tail ends of the first gas path and the second gas path are connected and used for mixing gas and nitrogen;
the nitrogen analyzer 9 is connected with the second gas path and used for detecting the purity of nitrogen in the mixed gas;
and the control system is connected with the nitrogen analyzer 9 and used for controlling the flow of the introduced nitrogen according to the comparison between the detected nitrogen purity in the mixed gas and a set value. The electric three-way valve 1 is connected with a gas terminal through the three-way valve 2 and is used for introducing nitrogen;
the second gas path includes:
an air electric valve 5 connected with the filtering component 6 and used for introducing air,
the filter assembly 6 is used for filtering water, oil and dust impurities in the gas and is connected with an air film pipe 7;
the air film pipe 7 is used for drying air and is connected with the adjusting type electric valve 8;
the adjusting electric valve 8 is connected with the three-way valve 2 and is used for introducing the mixed gas into a gas using terminal. The adjusting type electric valve 8 is connected with the three-way valve 2 through two one-way valves 4, the electric three-way valve 1 is connected to a pipeline between the two one-way valves 4 through a pressure reducing valve 3, and the air electric valve 5 is connected with the filtering component through the pressure reducing valve 3.
The nitrogen analyzer 9 is connected to the line between the two check valves 4. The filtering component 6 is a filter triple piece, and the control system is based on a PLC and respectively controls and connects the electric three-way valve 1, the air electric valve 5 and the adjusting electric valve 8.
In the invention, two paths are provided, namely a first gas path: nitrogen gas circuit and second gas circuit: a nitrogen gas path and a mixed gas path after gas mixing.
When gas mixing is not needed at ordinary times, nitrogen firstly enters the electric three-way valve 1 and then directly enters the gas using terminal/equipment through the three-way valve 2. The air electric valve 5 and the adjusting electric valve 5 do not work and are in a closed state.
When the mixed gas is needed to be used, the control system controls the air flow of the electric three-way valve 1 to move towards the pressure reducing valve 4 connected with the electric three-way valve, meanwhile, the air electric valve 5 is opened, the entering gas (such as air, nitrogen, oxygen or inert gas, taking air as an example) is reduced to the required set pressure through the pressure reducing valve 4, the air enters the filtering component 6 again to filter impurities such as water, oil and dust in the air, the air quality is improved again after entering the air film pipe 7, and the air enters the gas terminal/equipment after being mixed with the nitrogen after being reduced in pressure through the adjusting electric valve 8.
The electric three-way valve 1, the adjusting electric valve 8 and the air electric valve 5 are all controlled by a PLC program, the adjusting electric valve 8 determines the opening angle of the adjusting electric valve 8 according to the nitrogen purity detected by a nitrogen analyzer and according to the set nitrogen purity, and the opening angle of the adjusting electric valve 8 is used for controlling the flow rate of air entering the rear end to be mixed with nitrogen, thereby realizing the adjustment and control of the nitrogen purity. The adjusting electric valve 8 can adjust the angle at any time according to the comparison between the nitrogen purity and the set value, so that the purity is stabilized at the set value.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A nitrogen purity adjusting method for laser cutting is characterized by comprising the following steps:
supplying gas according to the gas consumption required by the gas consumption terminal;
when the gas using terminal needs nitrogen, the nitrogen directly enters gas using equipment;
when the gas terminal needs to mix gas, introducing decompressed gas, and filtering water, oil and dust impurities in the gas;
drying the filtered gas by a membrane drying method;
controlling the flow direction of the nitrogen, decompressing, mixing with the dried gas, and feeding into a gas using device.
2. The method for regulating nitrogen purity in laser cutting according to claim 1, wherein the nitrogen purity in the mixed gas is detected, compared with a set value of nitrogen purity, and the flow rate of the mixture of the dried gas and nitrogen is controlled according to the comparison result, so that the nitrogen purity is regulated and controlled to be maintained at the set value.
3. The method of claim 1, wherein the reduced pressure gas comprises but is not limited to air, nitrogen, oxygen, and inert gases.
4. A nitrogen purity adjusting apparatus for laser cutting, comprising:
the first gas path is connected with the gas terminal and is used for introducing nitrogen;
the second gas circuit is connected with the gas using terminal and used for introducing gas;
the tail ends of the first gas path and the second gas path are connected and used for mixing gas and nitrogen;
the nitrogen analyzer (9) is connected with the second gas path and is used for detecting the purity of nitrogen in the mixed gas;
and the control system is connected with the nitrogen analyzer (9) and used for controlling the flow of the introduced nitrogen according to the comparison between the detected purity of the nitrogen in the mixed gas and a set value.
5. The nitrogen purity regulating apparatus for laser cutting according to claim 4, wherein the first gas path comprises:
the electric three-way valve (1) is connected with the gas using terminal through the three-way valve (2) and is used for introducing nitrogen;
the second gas path includes:
an air electric valve (5) connected with the filtering component (6) and used for introducing air,
the filtering component (6) is used for filtering water, oil and dust impurities in the gas and is connected with the air film pipe (7);
the air film pipe (7) is used for drying air and is connected with the adjusting type electric valve (8);
and the adjusting electric valve (8) is connected with the three-way valve (2) and is used for introducing the mixed gas into a gas using terminal.
6. The nitrogen purity regulating device for laser cutting according to claim 5, characterized in that the regulating type electric valve (8) is connected with the three-way valve (2) through two one-way valves (4), the electric three-way valve (1) is connected with a pipeline between the two one-way valves (4) through a pressure reducing valve (3), and the air electric valve (5) is connected with the filtering component through the pressure reducing valve (3).
7. A laser cut nitrogen purity regulating device according to claim 5, characterized in that the nitrogen analyzer (9) is connected to the line between two one-way valves (4).
8. The nitrogen purity regulating equipment for laser cutting according to any one of claims 5 to 7, wherein the filtering component (6) is a filter triplet, and the control system is based on a PLC and is used for respectively controlling and connecting an electric three-way valve (1), an air electric valve (5) and a regulating electric valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368939.3A CN112917005A (en) | 2021-04-06 | 2021-04-06 | Method and equipment for adjusting nitrogen purity of laser cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110368939.3A CN112917005A (en) | 2021-04-06 | 2021-04-06 | Method and equipment for adjusting nitrogen purity of laser cutting |
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| Publication Number | Publication Date |
|---|---|
| CN112917005A true CN112917005A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110368939.3A Pending CN112917005A (en) | 2021-04-06 | 2021-04-06 | Method and equipment for adjusting nitrogen purity of laser cutting |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772562A (en) * | 2022-05-31 | 2022-07-22 | 杭州博曼流体工业有限公司 | Gas quantity and purity adjusting mechanism of modular PSA nitrogen making machine |
| CN116550108A (en) * | 2023-05-12 | 2023-08-08 | 上海科益生物科技有限公司 | Nitrogen generating device |
-
2021
- 2021-04-06 CN CN202110368939.3A patent/CN112917005A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114772562A (en) * | 2022-05-31 | 2022-07-22 | 杭州博曼流体工业有限公司 | Gas quantity and purity adjusting mechanism of modular PSA nitrogen making machine |
| CN116550108A (en) * | 2023-05-12 | 2023-08-08 | 上海科益生物科技有限公司 | Nitrogen generating device |
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Effective date of registration: 20211013 Address after: 311113 Room 302, office building, No. 11, Houyang Road, Anxi Industrial Park, Liangzhu street, Yuhang District, Hangzhou City, Zhejiang Province Applicant after: Hangzhou Boman fluid Industry Co.,Ltd. Address before: Room 101, unit 3, building 39, bailujun East, Xinqiao community, Liangzhu street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: Lv Honghui |