CN100525552C - Gas working dielectric conversion device capable of working under bad circumstances - Google Patents
Gas working dielectric conversion device capable of working under bad circumstances Download PDFInfo
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- CN100525552C CN100525552C CNB2006100097939A CN200610009793A CN100525552C CN 100525552 C CN100525552 C CN 100525552C CN B2006100097939 A CNB2006100097939 A CN B2006100097939A CN 200610009793 A CN200610009793 A CN 200610009793A CN 100525552 C CN100525552 C CN 100525552C
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- gas
- timer
- overflow valve
- arc heater
- conversion device
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Abstract
A switching device of gas media enabling to be operated under adverse circumstances is prepared as setting two input ends and two output ends on timer as using input end to input control signal of operator and connecting output end separately to two solenoid valves, combining output ends of two solenoid valve then connecting it to overflow valve (OV) being used to supply gas to plasma arc heater, connecting outlet of OV to gas flow meter and converting flow rate signal to be electric signal being sent to up level computer for processing by utilizing communication line according to RS485 asynchronous serial communication rule.
Description
(1) technical field
What the present invention relates to is a kind of conversion equipment of gas, specifically a kind of can be in strongly disturbing experimental situation, fast, the device of real time altering experimental provision gas working dielectric.
(2) background technology
With the plasma arc heater is in the heat resistant material ground experimental system for simulating of core, and adopting pressure-air in order to simulate the actual Service Environment of heat insulation material is working media.And the interaction of the heat chemistry of reentry thermal protection material and environment is the important component part of its ablative mechanism research, in order to disclose the complex chemical reaction that material takes place in the ultra-high temperature plasma air ambient, adopt non-oxidized gas as heater working media or heating back coolant, the solution of comparing and generally being admitted with the experimental simulation result of air dielectric.
The plasma arc heater is to produce electric arc by the gas medium that its air supply system of ionization is provided, and relying on not simultaneously, the ionized gas working media blows electric arc to heater nozzle generation experiment electric arc.So in experimentation, must keep the continuous of source of the gas gas constantly, otherwise will injure experimental facilities and personnel's safety.Because the stability of source of the gas gas will directly influence the stability in heater outlet flow field in the experimentation, experimental result is produced remarkable influence, so guarantee that the stability of source of the gas gas in the experimentation also is considerable.AC plasma electro-arc heater operating voltage is in the 3000-10000VAC scope; because its three-phase neutral point of heater oneself requirement can not ground protection; and because the voltage of physical condition restriction (heater imbalance of three-phase voltage) its theoretical neutral point is non-vanishing, heater is starting and is stopping the time space electromagnetic field formation electromagnetic interference that can have greatly changed.
How in strong interference environment, to guarantee realizing that quick, the real-time conversion of gas working dielectric in the experimentation is the problem that always perplexs the researcher under continuous, the stable prerequisite of heater source of the gas.
(3) summary of the invention
The object of the present invention is to provide a kind of can be in strongly disturbing experimental situation, fast, the gas working dielectric conversion device that can under adverse circumstances, work of real time altering experimental provision gas working dielectric.
The object of the present invention is achieved like this: be connected with gas flowmeter on the pipeline that gas medium is provided to the plasma arc heater, overflow valve, the electromagnetically operated valve of two parallel connections and timer, timer has two inputs and two outputs, the input input operation personnel's of timer control signal, the output of timer connects two electromagnetically operated valves respectively, the output of two electromagnetically operated valves merges the back and connects overflow valve, the overflow valve outlet connects the gas ions electro-arc heater after connecing gas flowmeter, and the flow signal of gas flowmeter is uploaded to host computer by communication line by RS485 asynchronous serial communication criterion after converting the signal of telecommunication to.
The present invention can also comprise:
1, is covered with Al-alloy metal shell and ground connection at whole device.
2, the optical isolation of all connecting on all controls and the communication line.
It comprises timer composition of the present invention, electromagnetically operated valve, overflow valve, gas flowmeter, optical isolation.Two electromagnetically operated valves are controlled the gas path on-off of two kinds of gas with various working medias respectively.Timer has two inputs and two corresponding outputs, and input is accepted operating personnel's control signal, and output is controlled the operating state of two electromagnetically operated valves respectively.The overflow valve of flowing through after the output of two electromagnetically operated valves merges, overflow valve control finally flows to the gas pressure of heater.Overflow valve outlet connects gas flowmeter, and flowmeter will be monitored the gas flow state in real time and convert flow signal to the signal of telecommunication and is uploaded to host computer by communication line by RS485 asynchronous serial communication criterion and handle the handled easily personnel gas flow state is monitored in real time.The optical isolation of all connecting on this device outer cover Al-alloy metal shell and ground connection, all controls and communication line.Be provided with Al-alloy metal shell and ground connection outside.The optical isolation of all connecting on all controls and the communication line.
The present invention has following major technique feature:
1, the control signal of sending by timer operation response personnel, after being accepted, control signal selected the electromagnetic valve of gas circuit of conducting to open immediately, a road other gas circuit is then through being closed after the time by timer-operated corresponding delay, can avoid effectively having guaranteed the continuity of heater source of the gas because the subtle difference of electromagnetically operated valve response time causes the generation of source of the gas gas-break phenomenon.
2, finally flow to the source of the gas gas pressure of heater by overflow valve control, avoided effectively to guarantee the stability of heater source of the gas because the phenomenon that the source of the gas gas flow that causes to offer heater during two kinds of gas with various working media source of the gas loops conducting simultaneously that the timer time-delay causes changes produces.
3, the present invention has realized that by optical isolation the physics between computer and control desk and the signal circuit cuts off; not only eliminated the noise voltage interference effectively; and solved problems such as long line driving and impedance matching effectively, can when the equipment under test short circuit, protection system not be damaged simultaneously yet.
The present invention mainly forms gas medium gating loop by two electromagnetically operated valves and a twin-channel timer.By timer input responsive control signal, output control respective electrical magnet valve realizes being selected the time difference between the electromagnetically operated valve action of open and close.Response time＜10ms is opened in whole loop, the shut-in time by artificially be provided with can 10ms in the 10min scope continuously, accurately controlled.
Connect on the gas circuit between electromagnetic valve outlet and the heater overflow valve and gas flowmeter.The overflow valve outlet pressure is adjustable continuously in 0-4MPa scope, by adjustments of gas working medium pressure and overflow valve outlet pressure, can guarantee that the source of the gas of the central heater of experimentation is stable.The flowmeter error is supported the RS-485 asynchronous serial communication less than 0.2 grade, and is adjustable in 1-10 time/second scope of traffic rate, can carry out long-range real-time monitoring to the gas working dielectric flow parameter in the experimentation by the asynchronous serial communication operating personnel.
All connect up to the optical isolation that insulate more than the 10000VAC on timer control end and the flowmeter communication loop; in experimentation; if the equipment leaky takes place, spacer assembly can effectively protect central computer and operating personnel to be unlikely to touch 10000V high-tension electricity in the test environment.Simultaneously, whole device outer cover aluminum alloy casing and ground connection have shielded the interference of external magnetic field effectively, the operate as normal of assurance device.
The present invention can realize in strongly disturbing experimental situation fast, the purpose of real time altering experimental provision gas working dielectric.
Our experiments show that the present invention realizes that bleed pressure is the smooth conversion of air and the nitrogen medium of 4MPa in the strong electromagnetic interference environment that 10000VAC produces.Transition response time＜10ms, the media stabilize time, 1ms was adjustable continuously to 10min.Can monitor the gas flow state with the speed of 10 times/S the soonest, error is less than 0.2 grade.
(4) description of drawings
Accompanying drawing 1 is an operation principle schematic diagram of the present invention.
Accompanying drawing 2 is structural representations of the present invention
(5) embodiment
For a more detailed description to the present invention for example below in conjunction with accompanying drawing:
In conjunction with the accompanying drawings, consisting of of the gas working dielectric conversion device that can under adverse circumstances, work: the electromagnetically operated valve 2,7 and the timer 5 that on the pipeline 9 that gas medium is provided to plasma arc heater 14, are connected with gas flowmeter 13, overflow valve 12, two parallel connections.Timer has two inputs 4 and two outputs 6, input input operation personnel's control signal 3, output connects two electromagnetically operated valves respectively, the output of two electromagnetically operated valves merges the back and connects overflow valve, overflow valve is carried gas to the plasma arc heater, overflow valve outlet connects gas flowmeter, and the flow signal of flowmeter converts to and is uploaded to host computer 11 by communication line by RS485 asynchronous serial communication criterion behind the signal of telecommunication and handles.
Suppose the gas working dielectric 8 that needs the gas working dielectric 1 of the electromagnetically operated valve 2 of flowing through is converted to the electromagnetically operated valve 7 of flowing through in the experimentation.
(1) be the interior a certain numerical value of 0-4MPa scope according to experiment requirements set overflow valve 12 outlet pressures;
(2) set timer 5 delay times as required;
(3) timer input 4 receives the control signal 3 that operating personnel send and responds;
(4) timer output end 6 control electromagnetically operated valves 7 are opened immediately, and gas working dielectric 8 enters gas pipeline 9, and gas pipeline 9 in simultaneously exist gas working dielectric 1 and gas working dielectric 8 because electromagnetically operated valve 2 does not cut out as yet this moment, and pipeline pressure rises;
(5) along with gas pipeline 9 internal pressures rise, overflow valve 12 is started working and is guaranteed the numerical value of the constant pressure of its output in user's appointment by discharging more than gas;
(6) air-flow of overflow valve 12 outputs flows into electro-arc heater 14 through gas flowmeter 13 backs;
(7) digital gas flowmeter (YF104-AAUS4J) 13 is converted into digital voltage signal with the gas flow signal that records, and digital voltage signal unifies to handle the back for operating personnel's reference through optical isolation 10 back input computers 11;
(8) whole device outer cover aluminum alloy casing 15 and ground connection, the interference of shielding external magnetic field.
Claims (3)
1, a kind of gas working dielectric conversion device that can under strong electromagnetic interference environment, work that is used for the plasma arc heater, on the pipeline that gas medium is provided to the plasma arc heater, be connected with gas flowmeter, overflow valve, the electromagnetically operated valve of two parallel connections and timer, it is characterized in that: timer has two inputs and two outputs, the input input operation personnel's of timer control signal, the output of timer connects two electromagnetically operated valves respectively, the output of two electromagnetically operated valves merges the back and connects overflow valve, the overflow valve outlet connects the gas ions electro-arc heater after connecing gas flowmeter, and the flow signal of gas flowmeter is uploaded to host computer by communication line by RS485 asynchronous serial communication criterion after converting the signal of telecommunication to.
2, the gas working dielectric conversion device that can work under strong electromagnetic interference environment that is used for the plasma arc heater according to claim 1 is characterized in that: be covered with Al-alloy metal shell and ground connection at whole device.
3, the gas working dielectric conversion device that can work under strong electromagnetic interference environment that is used for the plasma arc heater according to claim 1 and 2 is characterized in that: the optical isolation of all connecting on all controls and the communication line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100097939A CN100525552C (en) | 2006-03-10 | 2006-03-10 | Gas working dielectric conversion device capable of working under bad circumstances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100097939A CN100525552C (en) | 2006-03-10 | 2006-03-10 | Gas working dielectric conversion device capable of working under bad circumstances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1849019A CN1849019A (en) | 2006-10-18 |
| CN100525552C true CN100525552C (en) | 2009-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100097939A Expired - Fee Related CN100525552C (en) | 2006-03-10 | 2006-03-10 | Gas working dielectric conversion device capable of working under bad circumstances |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0133652A1 (en) * | 1983-07-28 | 1985-03-06 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Protective device for a bottom electrode of a direct current arc furnace |
| US5023897A (en) * | 1989-08-17 | 1991-06-11 | Carl-Zeiss-Stiftung | Device for generating X-radiation with a plasma source |
| US5274664A (en) * | 1990-07-23 | 1993-12-28 | Danieli & C. Officine Meccaniche Spa | Method and device to control the force applied to the electrode-bearing arms of an electric arc furnace |
| CN2255710Y (en) * | 1996-04-05 | 1997-06-04 | 中国科学院力学研究所 | Pulse gas-charging device for electric arc plasma generator |
| WO1997029617A1 (en) * | 1996-02-08 | 1997-08-14 | Koester Volkwin | Electrode and cooling element for a metallurgical vessel |
| US6011248A (en) * | 1996-07-26 | 2000-01-04 | Dennis; Mahlon Denton | Method and apparatus for fabrication and sintering composite inserts |
| US6447376B1 (en) * | 1999-03-03 | 2002-09-10 | Riken | Plasma discharge truing apparatus and fine-machining methods using the apparatus |
| CN1122438C (en) * | 1999-10-12 | 2003-09-24 | 杨学实 | Controller for sweating electrode |
-
2006
- 2006-03-10 CN CNB2006100097939A patent/CN100525552C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0133652A1 (en) * | 1983-07-28 | 1985-03-06 | BBC Aktiengesellschaft Brown, Boveri & Cie. | Protective device for a bottom electrode of a direct current arc furnace |
| US5023897A (en) * | 1989-08-17 | 1991-06-11 | Carl-Zeiss-Stiftung | Device for generating X-radiation with a plasma source |
| US5274664A (en) * | 1990-07-23 | 1993-12-28 | Danieli & C. Officine Meccaniche Spa | Method and device to control the force applied to the electrode-bearing arms of an electric arc furnace |
| WO1997029617A1 (en) * | 1996-02-08 | 1997-08-14 | Koester Volkwin | Electrode and cooling element for a metallurgical vessel |
| CN2255710Y (en) * | 1996-04-05 | 1997-06-04 | 中国科学院力学研究所 | Pulse gas-charging device for electric arc plasma generator |
| US6011248A (en) * | 1996-07-26 | 2000-01-04 | Dennis; Mahlon Denton | Method and apparatus for fabrication and sintering composite inserts |
| US6447376B1 (en) * | 1999-03-03 | 2002-09-10 | Riken | Plasma discharge truing apparatus and fine-machining methods using the apparatus |
| CN1122438C (en) * | 1999-10-12 | 2003-09-24 | 杨学实 | Controller for sweating electrode |
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| Publication number | Publication date |
|---|---|
| CN1849019A (en) | 2006-10-18 |
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Granted publication date: 20090805 Termination date: 20100310 |