CN207435512U - A kind of cooling gas self-checking device for phase transformation instrument - Google Patents
A kind of cooling gas self-checking device for phase transformation instrument Download PDFInfo
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- CN207435512U CN207435512U CN201721320581.2U CN201721320581U CN207435512U CN 207435512 U CN207435512 U CN 207435512U CN 201721320581 U CN201721320581 U CN 201721320581U CN 207435512 U CN207435512 U CN 207435512U
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- 239000000112 cooling gas Substances 0.000 title claims abstract description 45
- 230000009466 transformation Effects 0.000 title claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 130
- 238000001816 cooling Methods 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000004088 simulation Methods 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 50
- 239000001307 helium Substances 0.000 claims description 31
- 229910052734 helium Inorganic materials 0.000 claims description 31
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000658 steel phase Inorganic materials 0.000 description 2
- 241000486406 Trachea Species 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001073 sample cooling Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The utility model discloses a kind of cooling gas self-checking devices for phase transformation instrument, including source of the gas, source of the gas switching part, gas self-regulation part, gas cooling rate adapts to regulating member automatically, gas cooling injecting-unit, cooling gas controller, temperature control unit, temperature control program generator, source of the gas, source of the gas switching part, gas self-regulation part, gas cooling rate adapts to regulating member and is connected with gas cooling injection component order automatically, cooling gas controller is connected with source of the gas switching part and controls source of the gas switching part, cooling gas controller and gas cooling rate adapt to regulating member and are connected and gas cooling rate is controlled to adapt to regulating member automatically automatically, cooling gas controller is also connected with PC and temperature control program generator respectively, gas self-regulation part is also connected with temperature control unit.The utility model realizes the accurate control to temperature in multistage cooling technique simulation test, avoids the cumbersome of manual switching source of the gas and adjusting gas flow.
Description
Technical field
The utility model is related to a kind of self-checking devices, and in particular to a kind of cooling gas for phase transformation instrument is adjusted automatically
Regulating device belongs to the physical simulation experiment technical field of steel.
Background technology
In the heat treatment of steel, the crystallization of the rate of heat addition, quenching rate and isothermal holding time to steel final products
Structure and gained physical property have larger impact.The variation of these microcosmic grain structures can pass through steel sample change in size
Process simulation is carried out to observe with real time monitoring.
The measurement that phase transformation instrument is based on steel phase transformation conversion can be used for establishing isothermal transformation diagram（TTT）And even
Continuous cooling transformation figure（CCT）, measure steel material critical point and the simulation of various heating and thermal insulation cooling techniques.This is to Study on Steel
Metallographic structure and mechanical property after heat treatment so as to reasonable employment steel grade and for formulating rational heat treatment process, are estimated
Safe cooling velocity when counting welded steel etc. has important meaning.
For the steel phase transition process under accurate simulation different heating and quenching rate, phase transformation instrument changes control to the rate of temperature
Make more demanding, general maximum controllable heating rate is up to 100 DEG C/S, and maximum controllable rate of temperature fall is up to 50 DEG C/s, temperature control essence
± 1 DEG C of degree.The sample heating of phase transformation instrument is generally completed by high-frequency induction heating, and sample cooling mainly uses high pressure nitrogen and helium
Spray cooling.Wherein nitrogen and helium be respectively applied at a slow speed under Cooling Mode.In cooling gas control, use more
Servo valve concatenates the cooling capacity of control gas with manual modulation valve.In low speed cooling and Fast Cooling, respectively before the test
Manual modulation valve aperture is turned down and tuned up or replaces the helium of amount of cooling water bigger, and is fitted by servo valve according to temperature difference in test
When adjust amount of cooling water.
During the CCT figure tests of steel material, usually in 900 DEG C or so heat preservations for a period of time, continuous coo1ing is then carried out.With
The development of the but technology of controlled rolling and controlled cooling in steel technique, austenitizing temperature will usually be heated to 1150 DEG C or more in steel material
It is kept the temperature, two sections to two sections or more of cooling is then carried out from this temperature to low temperature, foundation is provided to control cold technique.Usually
CCT figure tests, heating temperature is relatively low, and is cooled down for one-part form, and phase transformation instrument can meet the requirements well.But to adapt to controlled rolling control
Material from austenitizing temperature is dropped to low temperature, it is necessary to two or more cold by the development of refrigeration technique and ultrafast refrigeration technique
But technique.Usually there are rapid cooling, slow cooling or fast slow cooling to exist simultaneously in cooling technique.Usually it is present in experiment, actual temperature control
Koji-making line can not reach design temperature controlling curve requirement well.When manual modulation valve aperture is tuned up, high temperature section it is slow
Quickly cooling is but limited to heating power and the phenomenon that temperature reduction is too fast easily occurs；When manual modulation valve aperture is turned down, low-temperature zone
It is quickly cooled down the cooling capacity for being limited to gas temperature easily occur and reduced the phenomenon that slow, testing experiment can not carry out.
In order to extend the application range of phase transformation instrument, steel multistage cooling technique experimental study is carried out, it is necessary to the cold of equipment
But section temperature is accurately controlled.
Utility model content
The purpose of the utility model is to overcome one kind the defects of the prior art, is provided, can to adapt to rate of temperature fall automatically fast
Slow variation is realized in cooling technique to the cooling gas self-checking device for phase transformation instrument accurately controlled of temperature.
The utility model is realized in this way：
A kind of cooling gas self-checking device for phase transformation instrument is adjusted automatically including source of the gas, source of the gas switching part, gas
Section component, gas cooling rate adapt to regulating member, gas cooling injecting-unit, cooling gas controller, temperature control automatically
Unit, temperature control program generator, source of the gas, source of the gas switching part, gas self-regulation part, gas cooling rate are fitted automatically
Regulating member and gas cooling injection component order is answered to be connected, cooling gas controller is connected with source of the gas switching part and controls gas
Source switching unit part, cooling gas controller and gas cooling rate adapt to regulating member and are connected and control gas cooling rate automatically
Automatic to adapt to regulating member, cooling gas controller is also connected with PC and temperature control program generator respectively, and gas is adjusted automatically
Section component is also connected with temperature control unit.
Further scheme is：
The source of the gas includes：Nitrogen gas cylinder, nitrogen pressure reducing valve, helium gas cylinder, helium pressure reducing valve.
The source of the gas switching part includes：It is connected to the nitrogen switching solenoid valve after nitrogen pressure reducing valve and is connected to helium pressure reducing valve
Helium switching solenoid valve afterwards, gas circuit of the two-way gas by common tracheae access below.Nitrogen switching solenoid valve and helium
Gas switching solenoid valve is controlled by cooling gas controller.For cooling down at a slow speed, helium is used to be quickly cooled down wherein nitrogen.
The gas self-regulation part is the servo valve being connected to after source of the gas switching part, and servo valve is by temperature control unit
It is adjusted according to the difference of actual temperature and target temperature.When actual temperature is excessively high, servo valve opening is increased；Actual temperature is too low
When, reduce servo valve opening.
The gas cooling rate adapts to regulating member by the not cocurrent flow of the multichannel after being connected to gas self-regulation part automatically
The branch air path of amount control is realized.Each branch air path includes a solenoid valve and a manual modulation valve.Manual modulation valve evidence
The cooldown rate that respective branch gas circuit is adapted to presets different valve openings.Solenoid valve in branch air path is by cooling gas
Controller opens the valve of the branch air path adapted to current cooldown rate to gate corresponding gas according to current technical cooling requirement
Road.It realizes to being controlled into the gas flow in branch air path.
The gas cooling injecting-unit includes：Check valve, gas nozzle.Gas cooling rate adapts to regulating member automatically
Each branch air path meet at tracheae all the way, spray to steel sample through check valve and gas nozzle.
The temperature control program generator and cooling gas controller receive the test technology simulation curve data of PC.By
Temperature control program generator calculate technological process in current time control targe temperature, cooling gas controller automatically with temperature
Degree control sequence generator is synchronous.In cooling technique section, temperature control unit is according to actual temperature and the difference of target temperature, control
The power of heating unit and the servo valve opening in gas self-regulation part.
When the utility model at work, test technology simulation curve data are set by PC, and is handed down to temperature control program
Generator and cooling gas controller.The target temperature of current time in the generation technological process of temperature control program generator.
Warming-up section is realized by temperature control unit according to the power of actual temperature and the difference of target temperature control heating unit to heat up.It is dropping
Temperature section, it is on the one hand single by the servo valve opening in temperature control unit factually border temperature difference control gas self-regulation part and heating
The power of member when actual temperature is excessively high, increases servo valve opening, reduces heating power；When actual temperature is too low, reduce servo valve
Aperture increases heating power；On the other hand by cooling gas controller synchronous with temperature control program generator according to setting
Cooldown rate selection strategy, switch corresponding source of the gas and open gas cooling rate and adapt to respective branch in regulating member automatically
The solenoid valve of gas circuit, to adjust the cooling capacity of gas.By adapting to adjust to the automatic of cooldown rate, realize more to phase transformation instrument
The accurate control of temperature in section cooling technique.
The utility model introduces gas cooling rate self-regulation part in the cooling gas circuit of phase transformation instrument, realizes to more
The accurate control of temperature in section cooling technique simulation test.The structure jointly controlled using multipath electrovalve and manual modulation valve,
Control response is rapid, and convenient for user optimization control strategy.Cooling gas controller is automatically same with temperature control program generator
The switching of step and realization control source of the gas and the adjusting of gas flow.Avoid the numerous of manual switching source of the gas and adjusting gas flow
It is trivial.
Description of the drawings
Fig. 1 is the system structure diagram of the utility model.
In figure：1- nitrogen gas cylinders, 2- nitrogen pressure reducing valves, 3- helium gas cylinders, 4- helium pressure reducing valves, 5- tracheaes, 6- nitrogen are cut
Change solenoid valve, 7- helium switching solenoid valves, 8- servo valves, 9- first adjusts branch air path, 10- solenoid valves, and 11- is adjusted manually
Valve, 12- second adjust branch air path, and 13- the 3rd adjusts branch air path, and 14- the 4th adjusts branch air path, and 15- the 5th, which is adjusted, to be divided
Branch gas circuit, 16- isothermal transformation test solenoid valve, 17- isothermal transformation test manual modulation valve, 18- check valves, 19- gas nozzles,
20- cooling gas controllers.
Specific embodiment
The utility model is described in more detail with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of cooling gas self-checking device for phase transformation instrument includes：Nitrogen gas cylinder 1, nitrogen subtract
Pressure valve 2, helium gas cylinder 3, helium pressure reducing valve 4, tracheae 5, nitrogen switching solenoid valve 6, helium switching solenoid valve 7, servo valve 8,
One adjust branch air path 9, solenoid valve 10, manual modulation valve 11, second adjust branch air path the 12, the 3rd adjust branch air path 13,
4th adjusts the adjusting of branch air path the 14, the 5th branch air path 15, solenoid valve 16 is tested in isothermal transformation, isothermal transformation test is adjusted manually
Save valve 17, check valve 18, gas nozzle 19.
As shown in Figure 1, nitrogen gas cylinder 1, nitrogen pressure reducing valve 2, helium gas cylinder 3, helium pressure reducing valve 4 form cooling gas
Source of the gas.Nitrogen and helium after decompression are compiled in same gas circuit through nitrogen switching solenoid valve 6 and helium switching solenoid valve 7 respectively.Nitrogen
Gas switching solenoid valve 6, helium switching solenoid valve 7 form source of the gas switching part.
The gas flowed through from source of the gas switching part adjusts the adjusting of branch air path 9, second through servo valve 8 by first all the way
Branch air path the 12, the 3rd adjusts branch air path the 13, the 4th and adjusts the gas that branch air path the 14, the 5th adjusts the composition of branch air path 15
Cooldown rate adapts to regulating member automatically.Another way be isothermal transformation test branch gas circuit, by isothermal transformation test solenoid valve 16,
Isothermal transformation test manual modulation valve 17 forms.Gas cooling rate adapts to each branch air path of regulating member with first automatically
Adjusting branch air path 9 is identical, and the adjusting for forming and realizing to this branch gas flow is concatenated by solenoid valve 10, manual modulation valve 11.
Servo valve 8 is adjusted by temperature control unit according to the difference of actual temperature and target temperature.Actual temperature is excessively high
When, increase servo valve opening；When actual temperature is too low, reduce servo valve opening.
Gas cooling rate adapts to each branch air path of regulating member and corresponds to different cooldown rates respectively automatically.First is adjusted
Branch air path 9, second, which adjusts branch air path the 12, the 3rd and adjusts branch air path the 13, the 4th and adjust branch air path the 14, the 5th and adjust, to be divided
Branch gas circuit 15 corresponds to rate of temperature fall as 10 DEG C/S, the slow cooling of 20 DEG C/S and 30 DEG C/S, 40 DEG C/S, the rapid cooling of 50 DEG C/S respectively.Respectively
The manual modulation valve aperture of branch air path, is preset by the empirical value tested.
Isothermal transformation is tested solenoid valve 16 and is controlled by temperature control unit in isothermal transformation testing experiment（TTT）When open,
Isothermal transformation test manual modulation valve 17 adjusts final gas flow, in continuous cooling transformation（CCT and multistage cooling）When, etc.
The isothermal transformation test solenoid valve 16 of temperature transformation test branch gas circuit is closed.
The gas for adapting to regulating member outflow automatically from gas cooling rate connects together with isothermal transformation test branch gas circuit
Enter check valve 18, the gas cooling injecting-unit that gas nozzle 19 forms.The most cooling gas spray after control and regulation at last
To steel sample.
Cooling gas controller 20 obtains test technology simulation curve data from PC, and during with temperature control program generator
Between it is synchronous.Switch or close source of the gas in cooling technique section control nitrogen switching solenoid valve 6, helium switching solenoid valve 7.Basis simultaneously
The cooldown rate requirement of current temperature descending section, opens gas cooling rate adaptable therewith and adapts to regulating member branch air path automatically
Solenoid valve.Wherein cooldown rate be less than or equal to 10 DEG C/S, more than 10 DEG C/S and less than or equal to 20 DEG C/S when, respectively open first adjust
The solenoid valve that branch air path 9 and second adjusts branch air path 12 is saved, nitrogen switching solenoid valve 6 is opened simultaneously and is cooled down using nitrogen；
Cooldown rate be more than 20 DEG C/S and less than or equal to 30 DEG C/S, more than 30 DEG C/S and less than or equal to 40 DEG C/S, more than 40 DEG C/S and small
When equal to 50 DEG C/S, the 3rd is opened respectively and adjusts the adjusting adjusting of branch air path 14 and the 5th of branch air path the 13, the 4th branch gas
The solenoid valve on road 15 opens simultaneously helium switching solenoid valve 7 using helium gas cooling；When heating temperature is higher（1150 DEG C of ＞）When,
High temperature closes source of the gas switching part and gas cooldown rate adapts to adjust automatically to 900 ± 50 DEG C of (≤20 DEG C/S) coolings at a slow speed
All solenoid valves in component are saved, carry out natural cooling（Natural cooling rate is up to 20 DEG C/S under high temperature）.
The preferred embodiment of the utility model is at work：Nitrogen gas cylinder 1 and 3 valve of helium gas cylinder are opened, and is adjusted
Nitrogen pressure reducing valve 2 and helium pressure reducing valve 4 are saved.Test technology simulation curve data are set by PC, and are handed down to temperature control journey
Sequence generator and cooling gas controller 20.The control targe of current time in the generation technological process of temperature control program generator
Temperature.It is realized and risen according to the power of actual temperature and the difference of target temperature control heating unit by temperature control unit in warming-up section
Temperature.In temperature descending section, on the one hand opening by the servo valve 8 in temperature control unit factually border temperature difference control gas self-regulation part
The power of degree and heating unit when actual temperature is excessively high, increases 8 aperture of servo valve, reduces heating power；Actual temperature is too low
When, reduce 8 aperture of servo valve, increase heating power；On the other hand by cooling gas synchronous with temperature control program generator
Body controller switches nitrogen switching solenoid valve 6, helium switching solenoid valve 7 to switch gas according to the cooldown rate selection strategy of setting
Source and the solenoid valve for opening the respective branch gas circuit that gas cooling rate is adapted to automatically in regulating member, to adjust the cooling of gas
Ability.By adapting to adjust to the automatic of cooldown rate, the accurate control to temperature in phase transformation instrument multistage cooling technique is realized.
The temperature control program generator of the utility model is relatively common Temperature-controlled appliance, is mainly used in temperature
Programme-control in generate real-time control targe, such as in the temperature-controlling system of program curve heating, for generating real-time mesh
Mark temperature.By the process curve of upper computer input temperature control to temperature control program generator, then by temperature control program
Generator calculates current control targe temperature according to the heating rate of current process section in real time.
Although reference be made herein to the utility model is described in the explanatory embodiment of the utility model, above-described embodiment
The only preferable embodiment of the utility model, the embodiment of the utility model are simultaneously not restricted to the described embodiments, it should
Understand, those skilled in the art can be designed that a lot of other modifications and embodiment, these modifications and embodiment will fall
Within spirit disclosed in the present application and spirit.
Claims (7)
1. a kind of cooling gas self-checking device for phase transformation instrument, it is characterised in that：Including source of the gas, source of the gas switching part,
Gas self-regulation part, gas cooling rate adapt to regulating member, gas cooling injecting-unit, cooling gas control automatically
Device, temperature control unit, temperature control program generator, source of the gas, source of the gas switching part, gas self-regulation part, gas are cold
But rate adapts to regulating member and gas cooling injection component order and is connected automatically, cooling gas controller and source of the gas switching part
It is connected and controls source of the gas switching part, cooling gas controller and gas cooling rate adapts to regulating member and be connected and control automatically
Gas cooling rate adapts to regulating member automatically, cooling gas controller also respectively with PC and temperature control program generator phase
Even, gas self-regulation part is also connected with temperature control unit.
2. the cooling gas self-checking device of phase transformation instrument is used for according to claim 1, it is characterised in that：
The source of the gas includes：Nitrogen gas cylinder, nitrogen pressure reducing valve, helium gas cylinder, helium pressure reducing valve.
3. the cooling gas self-checking device of phase transformation instrument is used for according to claim 2, it is characterised in that：
The source of the gas switching part includes：It is connected to the nitrogen switching solenoid valve after nitrogen pressure reducing valve and is connected to helium after helium pressure reducing valve
Gas switching solenoid valve, gas circuit of the two-way gas by common tracheae access below；Nitrogen switching solenoid valve and helium are cut
Solenoid valve is changed to be controlled by cooling gas controller.
4. the cooling gas self-checking device of phase transformation instrument is used for according to claim 3, it is characterised in that：
The gas self-regulation part is the servo valve being connected to after source of the gas switching part, servo valve by temperature control unit factually
Border temperature and the difference of target temperature are adjusted.
5. the cooling gas self-checking device of phase transformation instrument is used for according to claim 4, it is characterised in that：
The gas cooling rate adapts to regulating member by the multichannel different flow control after being connected to gas self-regulation part automatically
The branch air path of system is realized；Each branch air path includes a solenoid valve and a manual modulation valve；Manual modulation valve is according to corresponding
The cooldown rate that branch air path is adapted to presets different valve openings；Solenoid valve in branch air path is controlled by cooling gas
Device is required according to current technical cooling, opens the valve of the branch air path adapted to current cooldown rate to gate corresponding gas circuit,
It realizes to being controlled into the gas flow in branch air path.
6. the cooling gas self-checking device of phase transformation instrument is used for according to claim 5, it is characterised in that：
The gas cooling injecting-unit includes：Check valve, gas nozzle, gas cooling rate adapt to each of regulating member automatically
Branch air path meets at tracheae all the way, and steel sample is sprayed to through check valve and gas nozzle.
7. the cooling gas self-checking device of phase transformation instrument is used for according to claim 6, it is characterised in that：
The temperature control program generator and cooling gas controller receive the test technology simulation curve data of PC, by temperature
Control sequence generator calculate technological process in current time control targe temperature, cooling gas controller automatically with temperature control
Sequence generator processed is synchronous, and in cooling technique section, temperature control unit is according to actual temperature and the difference of target temperature, control heating
The power of unit and the servo valve opening in gas self-regulation part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721320581.2U CN207435512U (en) | 2017-10-13 | 2017-10-13 | A kind of cooling gas self-checking device for phase transformation instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721320581.2U CN207435512U (en) | 2017-10-13 | 2017-10-13 | A kind of cooling gas self-checking device for phase transformation instrument |
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| Publication Number | Publication Date |
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| CN207435512U true CN207435512U (en) | 2018-06-01 |
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| CN201721320581.2U Expired - Fee Related CN207435512U (en) | 2017-10-13 | 2017-10-13 | A kind of cooling gas self-checking device for phase transformation instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556641A (en) * | 2020-06-05 | 2020-08-18 | 清华大学 | Exposed electrode type atmospheric pressure plasma generator system in low temperature range |
-
2017
- 2017-10-13 CN CN201721320581.2U patent/CN207435512U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556641A (en) * | 2020-06-05 | 2020-08-18 | 清华大学 | Exposed electrode type atmospheric pressure plasma generator system in low temperature range |
| CN111556641B (en) * | 2020-06-05 | 2021-04-16 | 清华大学 | Exposed electrode type atmospheric pressure plasma generator system in low temperature range |
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