CN114375236A - Improved method of regulating gas flow and system using the improved flow regulation method - Google Patents
Improved method of regulating gas flow and system using the improved flow regulation method Download PDFInfo
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- CN114375236A CN114375236A CN202080053483.5A CN202080053483A CN114375236A CN 114375236 A CN114375236 A CN 114375236A CN 202080053483 A CN202080053483 A CN 202080053483A CN 114375236 A CN114375236 A CN 114375236A
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- flow rate
- industrial gas
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 31
- 238000003466 welding Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- 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
- B23K10/00—Welding or cutting by means of a plasma
-
- 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
- B23K26/1437—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 for flow rate control
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0953—Monitoring or automatic control of welding parameters using computing means
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
- B23K9/0956—Monitoring or automatic control of welding parameters using sensing means, e.g. optical
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
- G05D7/0641—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means
- G05D7/0652—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means the plurality of throttling means being arranged in parallel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Theoretical Computer Science (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention is a method for regulating the flow of an industrial gas used in a production system (1), the production system (1) comprising a distribution station (2) adapted to distribute the industrial gas, a processing unit (3) using the industrial gas distributed by the distribution station (2), and conveying means (4) adapted to convey the industrial gas from the distribution station (2) to the processing unit (3). The delivery device (4) comprises two or more distribution valves (5, 6, 7) of the on-off type arranged in parallel with each other and each configured to distribute the industrial gas at a preset flow rate. The flow of industrial gas delivered to the processing unit (3) is regulated by selectively opening and closing one or more distribution valves (5, 6, 7).
Description
The present invention relates to a method for regulating the flow of a fluid, in particular suitable for regulating the flow of any type of gas used in any system.
More specifically, the method, which is the subject of the present invention, is used for regulating the flow of a gas, preferably an industrial or working gas, used in an industrial system (for example an industrial welding system of the MIG, MAG or TIG type), a plasma welding and cutting system, or a laser beam system.
In general, the present invention relates to any industrial system using the above-described method for regulating the flow of a gas, preferably a process type gas.
It is well known that the systems listed above use various types of gases having characteristics that make them suitable for active or passive participation in the process.
For example, in TIG welding, the arc is protected from contact with oxygen present in the external environment by a gas flow, which typically comprises argon, helium, nitrogen or a mixture of these gases.
Similarly, in a plasma cutting process, a plasma jet is generated in a torch, wherein an arc ionizes a gas mixture (e.g., a mixture of argon and hydrogen).
The plasma jet is directed through a calibrated nozzle at the material to be cut, which is melted to form a cut, the perimeter of which is determined by the path defined for the torch.
Similarly, in a laser cutting process, a laser beam is used, which is focused on the material to be cut and flows along a calibrated nozzle together with a coaxial inert or reactive gas flow.
The examples mentioned above and briefly described in relation to the welding and cutting systems are only examples of the need for delivering a controlled flow of gas to the work area during the process.
The gas flow rates used vary according to the type of system and the type of material to be treated, its characteristics and other parameters (if any), and it is therefore necessary to equip the system with devices suitable for providing variable gas flow rates according to various needs.
In the known art, proportional solenoid valves are used to deliver variable gas flows to the processing units, wherein said proportional solenoid valves, as is known, allow to continuously regulate the flow of the exhaust gases, adapting them to the different requirements of the plant in which they are used.
More specifically, proportional solenoid valves are provided with shutters controlled by solenoids, each of which provides a flow of gas proportional to the degree of opening of the shutter, which in turn is proportional to the value of the current supplied to the solenoid, which is supplied by an electronically controlled power source.
It is noted that a disadvantage of using the proportional valve is that it is rather costly.
It is therefore an object of the present invention to provide an improved method of regulating the flow of gas in a system, wherein the method may avoid the use of proportional valves.
Another object of the invention is to reduce the construction costs of a system comprising a process unit in which a variable flow of industrial gas is used.
Furthermore, it is a further object of the present invention to provide a production system in which the above improved conditioning method is applied.
The above object is achieved by the method according to the invention according to the main claim, the details of which are described with reference to the main claim and its dependent claims.
The application of the method as subject of the invention advantageously makes it possible to reduce the construction costs of production systems in which processing units (for example laser beams or plasma welding and/or cutting machines) are present, as well as of systems that require a processing cycle using an industrial gas supplied at a variable flow rate (also called operating gas).
The objects and advantages listed here are achieved by a method according to the invention, which is described below with reference to the accompanying drawings, which are provided as non-limiting examples only, wherein:
figure 1 schematically represents a system using the method of the invention.
The method as subject of the invention makes it possible to regulate the flow of industrial or working gas to a processing unit of any type of production system.
The method is described below with reference to fig. 1, fig. 1 providing a schematic view of a production system, indicated as a whole by 1.
More specifically, the production system 1 comprises a processing unit 3 using an industrial gas which is conveyed from the distribution station 2 to the processing unit 3 by conveying means 4.
The mentioned production system 1 may be a fixed system or a mobile system comprising one or more machining units 3 of various types, such as machine tools.
Furthermore, the distribution station 2 can have different configurations and, in the case of a large fixed production system, it can comprise an industrial gas storage or production plant, whereas in a small mobile system it comprises only one or more cylinders.
According to the method of the invention, the flow rate of the industrial gas delivered to the processing unit 3 requires the use of two or more distribution valves 5,6,7 belonging to the delivery device 4, independently of the dimensions of the system.
It is clear that the use of three dispensing valves is shown in fig. 1 only by way of indicative example, as they can be present in any number as long as there are not less than two valves.
As shown in fig. 1, all valves 5,6,7 are connected in parallel with each other, since their inlet channels 5a, 6a, 7a are connected to an inlet pipe 8 communicating with the dispensing station 2, and their outlet channels 5b, 6b, 7b are connected to an outlet pipe 9 communicating with the processing unit 3.
Each distribution valve 5,6,7 is of the on-off type and therefore can only open and close the flow of gas from the distribution station 2 to the processing unit 3, without modifying its flow rate.
According to the method that is the subject of the present invention, the regulation of the flow rate of the industrial gas delivered to the processing unit 3 is achieved by the selective opening and closing of said one or more distribution valves 5,6, 7.
According to one embodiment, all distribution valves 5,6,7 are configured in such a way that they supply the same preset flow rate.
According to a variant embodiment, the distribution valves 5,6,7 are configured in such a way that each of them supplies a preset flow rate, the value of which is different from the value of the flow rate supplied by the other valve.
According to a further variant embodiment, the distribution valves 5,6,7 are configured in such a way that each of them supplies a preset flow whose value is different from the value of the flow supplied by the other valve, and the values of said flows are distributed according to a binary sequence.
More specifically, the distribution valves 5,6,7 are configured in such a way that the relationship between their preset values of flow is in turn defined according to a power of two. In other words, the flow value of each of the distribution valves 5,6,7 is equal to half and/or twice the flow value of at least one other of said distribution valves 5,6, 7.
Advantageously, this configuration makes it possible to define, as required, a value of the total flow provided which is substantially variable over the whole interval from zero flow (when all the distribution valves 5,6,7 are closed) to the maximum flow value (when all the distribution valves 5,6,7 are open).
By applying the calibrated nozzles 5c, 6c, 7c to the outlet channels 5b, 6b, 7b of each distribution valve 5,6,7, presetting the flow value provided by each valve, the regulation of the total flow by the control means selectively opening and closing one or more of the distribution valves 5,6,7, obtaining the flow necessary for providing the operation of the processing unit 3.
Preferably, the calibrated nozzles 5c, 6c, 7c are of the removable type, so that the flow rate provided by the same dispensing valve can be changed by simply replacing the calibrated nozzles.
The value of the total flow rate delivered by the delivery device 4 to the processing unit 3 is therefore variable according to the number of valves that are simultaneously open and the flow rate that each valve can supply depending on the calibrated nozzle mounted on it.
Furthermore, the total number of flows that can be obtained depends on the number of valves installed and the number of valves that can be opened simultaneously.
The number of flows corresponds to a non-repeating combination that can be obtained by using any number of simultaneously opening valves in all possible combinations.
Since the dispensing valve used is of the on-off type, it is possible to configure two positions, the number of combinations C that can be obtained, corresponding to the number of gas flows that can be obtained by conveniently combining the valves that are open and closed, is provided by the relation:
C＝2n
where n represents the number of valves used.
Referring to the situation described herein, where the dispensing valve 5,6,7 is n-3, the resulting combination number C is as follows:
C＝2n＝23＝8
thus, the valves can be arranged in 8 different combinations to provide 8 different total flows, including flow 0 for all valve closed states.
Thus, the user can use the most appropriate number of valves to adapt to provide the required flow rate after combining their opening and closing.
The measurement of the flow rate is carried out by measuring the difference between the pressure values upstream and downstream of each distribution valve 5,6,7 by means of a differential pressure meter, indicated by 5d, 6d, 7d in figure 1.
In practice, the total flow of industrial gas supplied by the distribution valves 5,6,7 to the processing unit 3 can be varied by conveniently modifying the combination of simultaneously open valves and providing them with suitable calibrated nozzles 5c, 6c, 7c adapted to the type and flow of the processing process.
To this end, the dispensing valves are preferably solenoid valves controlled and managed by a control system of known type, which allows them to be selectively opened and closed.
In this way, it is possible to regulate the gas flow without the need to use proportional valves which are more expensive and more difficult to manage than the on-off type distribution valves 5,6, 7.
As far as the production unit 3 is concerned, this can be any machine whose operation is carried out using an industrial gas flow, for example a welding machine or a machine that cuts material.
More specifically, in the case of welding operations, the machine in question may be a TIG, plasma or laser beam welder, and in the case of material cutting operations, the machine may also be of the plasma or laser beam type.
Based on the explanations provided above, it can be understood that the method which is the subject of the invention and the system which implements it achieve the set objects.
In particular, the on-off type distribution valve has a lower cost than the proportional valve, ensuring a saving in system construction costs.
In practice, the method and system that are the subject of the invention may be subject to modifications and variations that are neither described nor mentioned herein but must be considered protected by the present patent as long as they fall within the scope of the following claims.
Claims (9)
1. Method for regulating the flow of a gas, preferably of industrial type, used in a production system (1), said production system (1) comprising:
-at least one distribution station (2) adapted to distribute said industrial gas;
-at least one processing unit (3) using said industrial gas distributed by said distribution station (2);
-a conveying device (4) suitable for conveying the industrial gas from the distribution station (2) to the processing unit (3), the conveying device (4) comprising two or more distribution valves (5, 6, 7) of the on-off type arranged in parallel with each other and each distribution valve (5, 6, 7) being configured to distribute the industrial gas at a preset flow rate, the regulation of the flow rate of the industrial gas conveyed to the processing unit (3) being obtained by selectively opening and closing one or more of the distribution valves (5, 6, 7),
characterized in that the distribution valves (5, 6, 7) are configured in such a way that each distribution valve (5, 6, 7) distributes a preset flow rate, the value of which is different from the value of the flow rate of the other distribution valve (5, 6, 7), the preset flow rate values being distributed according to a binary sequence.
2. Method according to claim 1, characterized in that the distribution valve (5, 6, 7) is configured in such a way that the relation between the values of the preset flow rates of the distribution valve (5, 6, 7) is in turn defined according to the second power.
3. Method according to any of the preceding claims, characterized in that in each of said distribution valves (5, 6, 7) the preset flow rate of industrial gas is determined by a calibrated nozzle (5c, 6c, 7c) applied to the outlet channel (5b, 6b, 7b) of said distribution valve.
4. Method according to any of the preceding claims, characterized in that the production system (1) comprises control means for controlling the selective opening and closing of the distribution valves (5, 6, 7).
5. Method according to claim 4, characterized in that the measurement of the flow rate is carried out by differential measurement of the pressure upstream and downstream of each of the distribution valves (5, 6, 7).
6. Production system (1), said production system (1) comprising at least one processing unit (3), said processing unit (3) using an industrial gas coming from a distribution station (2) and delivered to said processing unit (3) by a delivery device (4), said delivery device (4) comprising two or more distribution valves of the on-off type (5, 6, 7) connected in parallel to each other, characterized in that said system (1) is configured to implement a method for regulating the flow rate of said industrial gas according to any one of claims 1 to 5.
7. System (1) according to claim 6, characterized in that said processing unit (3) is a laser cutting machine for cutting material.
8. System (1) according to claim 6, characterized in that said processing unit (3) is a plasma cutter for cutting material.
9. System (1) according to claim 6, characterized in that said processing unit (3) is a welder.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT201900007174 | 2019-05-23 | ||
| IT102019000007174 | 2019-05-23 | ||
| PCT/IB2020/054890 WO2020234846A1 (en) | 2019-05-23 | 2020-05-22 | Improved method for adjusting a gas flow and system using said improved flow adjustment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114375236A true CN114375236A (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080053483.5A Pending CN114375236A (en) | 2019-05-23 | 2020-05-22 | Improved method of regulating gas flow and system using the improved flow regulation method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114375236A (en) |
| WO (1) | WO2020234846A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749771A (en) * | 2022-05-20 | 2022-07-15 | 重庆理工大学 | Method for automatically adjusting flow of arc welding shielding gas by using electromagnetic valve group |
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| WO2018147354A1 (en) * | 2017-02-10 | 2018-08-16 | 株式会社フジキン | Flow rate measuring method and flow rate measuring device |
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-
2020
- 2020-05-22 WO PCT/IB2020/054890 patent/WO2020234846A1/en active Application Filing
- 2020-05-22 CN CN202080053483.5A patent/CN114375236A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4437795A1 (en) * | 1993-10-21 | 1995-04-27 | Mitsubishi Electric Corp | Machining head and laser-machining device |
| CN1406707A (en) * | 2001-08-17 | 2003-04-02 | 小池酸素工业株式会社 | Flow adjuster and processing devices |
| CN2864268Y (en) * | 2005-11-18 | 2007-01-31 | 三岳实业有限公司 | Structure improvement for injection-used magnetic valve |
| CN101496144A (en) * | 2006-01-11 | 2009-07-29 | 朗姆研究公司 | Gas switching section including valves having different flow coefficients for gas distribution system |
| CN101414162A (en) * | 2007-10-15 | 2009-04-22 | 喜开理株式会社 | Fluid flow distribution and supply unit and flow distribution control program |
| CN201915143U (en) * | 2010-12-21 | 2011-08-03 | 中芯国际集成电路制造(上海)有限公司 | Sprayer for chemical vapor deposition equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749771A (en) * | 2022-05-20 | 2022-07-15 | 重庆理工大学 | Method for automatically adjusting flow of arc welding shielding gas by using electromagnetic valve group |
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| Publication number | Publication date |
|---|---|
| WO2020234846A1 (en) | 2020-11-26 |
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