CN106493330A - Metal liquid level detection control apparatus for hot-mold continuous cast - Google Patents
Metal liquid level detection control apparatus for hot-mold continuous cast Download PDFInfo
- Publication number
- CN106493330A CN106493330A CN201611059410.9A CN201611059410A CN106493330A CN 106493330 A CN106493330 A CN 106493330A CN 201611059410 A CN201611059410 A CN 201611059410A CN 106493330 A CN106493330 A CN 106493330A
- Authority
- CN
- China
- Prior art keywords
- signal
- liquid level
- pole plate
- molten metal
- metal liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
A kind of metal liquid level detection control apparatus for hot-mold continuous cast, including detecting pole plate, signal processing module, display device, signal conditioner, servo control mechanism and performs device.The detection pole plate is located above metal bath surface, composition type variable electric capacity parallel with metal bath surface, detection pole plate and molten metal are conductively connected in the signal input part of the signal processing module, and the signal output part of signal processing module is conductively connected with the signal conditioner and display device respectively；The outfan of the signal conditioner is conductively connected with the signal input part of servo control mechanism；The signal processing module is processed after receiving the signal of type variable electric capacity C value changes and output signal is input to the signal conditioner, and after signal conditioner is processed, output order drives servo control mechanism.The adhesion of metal liquid film or metal oxide film and detection electrode is present invention, avoiding, the stability and degree of accuracy of detection and control is improve, be increased metal liquid level height real-time detection function.
Description
Technical field
The present invention relates to the metal liquid level detecting and controlling system in hot continuous casting technique, and in particular to a kind of for heat type company
The metal liquid level detection control apparatus of casting.
Background technology
Hot-mold continuous cast is a kind of metal material shaping new technique for combining directional solidification and continuously casting.With casting mold
The Free Surface of the molten metal of connection is to the important ginseng that the vertical dimension that casting mold is exported is that guarantee hot-mold continuous cast process is smoothed out
Number, is accurately detected to which and precise control, is one of key during the technology implementation.
In existing Ohno Continuous Casting Process, the detection means of metal liquid level mainly adopts electrode contact formula on-off circuit, i.e.,
Using switch the two poles of the earth of indicating circuit as liquid-level probe, or a pole therein is used as liquid-level probe, another extremely molten metal itself,
When molten metal is contacted with liquid-level probe, circuit communication, display lamp are lighted, and show that metal liquid level has reached the height of requirement.
Touch switch circuit can only indicate molten metal liquid level be under the height for requiring or on, can not refer to
The real-time height of molten metal liquid level is shown；Can also be cared for due to the adhesion of metal liquid film or metal oxide film etc., make detection electrode
Short circuit, causes molten metal liquid level less than requiring also to light display lamp during height, sends rub-out signal.
Content of the invention
For defect of the prior art, the present invention provides a kind of metal liquid level detection control dress for hot-mold continuous cast
Put, it is to avoid the adhesion of metal liquid film or metal oxide film and detection electrode, the occurrence of reduce inter-electrode short-circuit, improve
Detection and the stability and degree of accuracy of control, extend the service life of detection and control system, increased molten metal liquid level
The real-time detection function of height.
A kind of metal liquid level detection control apparatus for hot-mold continuous cast, including detecting pole plate, signal processing module, display
Device, signal conditioner, servo control mechanism and performs device, the detection pole plate are positioned at molten metal ullage and parallel with it,
Formed to detect the type variable electric capacity of pole plate and molten metal as electrode, detection pole plate and molten metal are conductively connected at the signal
The signal input part of reason module, the signal output part of signal processing module is respectively with signal conditioner and for showing real-time liquid level
The display device of height is conductively connected；The signal conditioner is connected to the signal output part and servo control mechanism of signal processing module
Between；When metal bath surface height change, the signal processing module receives the signal of type variable electric capacity C value changes and carries out
Signal is sent by signal output part after process, the display device and signal conditioner is transmitted to, after processing through signal conditioner
Signal is transmitted to servo control mechanism, and the servo control mechanism drives performs device, and then adjusts molten metal liquid level by performs device,
Setting height is allowed to come to, while the type variable electric capacity C values are recovered to original value.
Preferably, the detection pole plate is provided with a conductive rod, and conductive rod is perpendicular to detection pole plate.Conductive rod
Can be conductive with detection pole plate, conductive rod is fixed on smelting furnace, serves fixed and conductive effect to detecting pole plate.
Preferably, the side surface of the detection position of the pole plate in addition to bottom surface and conductive rod is equipped with insulating barrier.
The detection pole plate one side naked layer relative with molten metal liquid level, the other surfaces and conductive rod for detecting pole plate are insulated with smelting furnace
Contact, is greatly reduced the generation of drain conditions.
Preferably, described detection pole plate not with molten metal contacts.Detection pole plate is parallel with molten metal liquid level, makes capacitance more
Accurately.
Preferably, the signal processing module include local oscillator, frequency-modulated generator, buffer amplifier, converter, in
Audio amplifier, amplitude limiter, descriminator and terminal amplifier and connect to form heterodyne frequency modulation type capacitance measurement circuit.Using heterodyne
Frequency modulation type capacitance measurement circuit, makes signal processing module performance more preferably, more stable.
Preferably, the performs device is to be immersed in the buoyancy aid below metal bath surface or control by servo control mechanism driving
The stopper rod of molten metal source break-make.Buoyancy aid or stopper rod are driven using servo control mechanism, control accuracy is high, and error is little.
Beneficial effects of the present invention are embodied in：Detection pole plate is fixed on molten metal ullage, does not connect with molten metal all the time
Touch, it is to avoid metal liquid film or metal oxide film and the adhesion of battery lead plate, be greatly reduced sending out for electrode leak electricity short-circuit situation
Raw, the precision of molten metal level detection is improve, reduces error；It is connected to detect pole plate and metal before and after signal processing module
Type variable electric capacity and signal conditioner of the liquid for two-plate, the change information of capacitor's capacity pass to signal processing module, pass through
Heterodyne frequency modulation type capacitance measurement circuit accurately exports liquid level information and passes to display and signal conditioner, shows gold in real time
Category liquid liquid level simultaneously drives buoyancy aid or stopper rod by servo control mechanism, adjusts molten metal liquid level；Whole detection and control
Process, detection pole plate are not all contacted with molten metal liquid level, and contactless method for sensing is greatly extended for hot-mold continuous cast
Metal liquid level detecting and controlling system service life.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
Needed for embodiment or description of the prior art, accompanying drawing to be used is briefly described.In all of the figs, similar element
Or part is typically identified by similar reference.In accompanying drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the schematic diagram of the signal processing module of the present invention；
Structural representations of the Fig. 3 for the embodiment of the present invention one；
Structural representations of the Fig. 4 for the embodiment of the present invention two.
In accompanying drawing, 1- cups, 2- molten metals, 3- performs devices, 31- buoyancy aids, 32- stopper rods, 4- servo control mechanisms, 5- show
Device, 6- signal processing modules, 71- conduction rods, 72- detect pole plate, and 8- signal conditioners, 9- insulating barriers, 10- conductors, 11- are led
Flow tube, 12- casting molds, 13- equipment water jetting coolers, 14- carry-over pinch rolls, the cooling water that 15- sprays, 16- heating element heaters, 17- crucibles,
The stand-by molten metals of 18-, 19- discharge orifices, 20- frequency-modulated generators, 21- buffer amplifiers, 22- converters, 23- intermediate frequency amplifiers, 24-
Amplitude limiter, 25- descriminators, 26- terminal amplifiers, 27- local oscillators
Specific embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with accompanying drawing.Following examples are only used for
Technical scheme is described clearly, is therefore only used as example, and the protection model of the present invention can not be limited with this
Enclose.
Embodiment one：As shown in Figure 1, Figure 2 and Figure 3, the signal that Fig. 1 is the structural representation of the present invention, Fig. 2 is the present invention
The structural representation of the schematic diagram of processing module, Fig. 3 for the embodiment of the present invention one, wherein embodiment one are shown in application Fig. 1
The horizontally tracting hot continuous casting system of metal liquid level detecting and controlling system.Molten metal 2 is contained in cup 1, through bottom of furnace body
Insulated fireproof insulation material and isolate with steel plate furnace shell and be provided with the conductor 10 being conductively connected with molten metal 2, conductive rod 71 with
Detection pole plate 72 is vertically connected, and detection pole plate 72 is parallel to be suspended in 2 ullage of molten metal, detection pole plate 72 except with molten metal
2 relative one sides are coated outward without resistant to elevated temperatures insulating barrier 9, and conductive rod 71 and the remaining surface of detection pole plate 72 are coated with resistance to
The insulating barrier 9 of high temperature, conductive rod 71 are fixedly connected with detection pole plate 72, and are fixed in body of heater, define to detect pole plate
72 and molten metal 2 for electrode type variable electric capacity, capacitance size isWherein s is the lower surface face for detecting pole plate 72
Product, δ are that 2 liquid level of molten metal is 2 liquid level of molten metal and detects 72 following table of pole plate with the distance between 72 lower surface of pole plate, ε is detected
The dielectric constant of medium between face.Conductor 10 and conductive rod 71 are equipped with winding displacement and are connected to the frequency modulation of signal processing module 6
Agitator 20.Mozzle 11 is assemblied in the side of the cup 1 for containing liquid metal, the inner space with cup 1, and axis is in level
Place；Casting mold 12 is embedded in the port of export of mozzle 11；The outside of cup 1 and mozzle 11 is disposed with heating element heater 16；Cup
1st, mozzle 11, casting mold 12, heating element heater 16, detection pole plate 72 and buoyancy aid 31 are placed on by outer cover of steel plate and fire resistant heat preserving material
In the body of heater that material builds up.The metal that is drawn by the outlet of casting mold 12 is subject to the cold of the cooling water 15 sprayed by equipment water jetting cooler 13
But solidify, and casting mold is pulled out with certain speed by carry-over pinch rolls 14.When 2 liquid level of molten metal declines or rises, can power transformation
Hold changing apart from δ-value for two-plate, the C value respective changes of type variable electric capacity, variable signal will be transmitted to frequency-modulated generator 20, heterodyne
Frequency modulation type capacitance measurement circuit using type variable electric capacity as 20 resonant tank of frequency-modulated generator a part, when input quantity is apart from δ
During change, the C values of type variable electric capacity are caused to change, the frequency of oscillation of frequency-modulated generator 20 changes, in local oscillation
In the case that 27 keep frequency of device is constant, the buffered amplifier 21 of the output signal of frequency-modulated generator 20, converter 22, intermediate frequency are put
Big device 23, amplitude limiter 24, descriminator 25 and terminal amplifier 26 become the voltage proportional to δ or current signal after processing, should
Signal is transmitted to display 5 and signal conditioner 8, and the situation of change of 2 liquid level of molten metal is shown on display 5 in real time,
Synchronous signal actuator 8 converts the signal to the signal that servo control mechanism 4 can be executed, and servo control mechanism 4 drives performs device 3 to adjust
Whole liquid level, performs device 3 are buoyancy aid 31, are declined in vertical direction by buoyancy aid 31 or rise adjustment 2 liquid level of molten metal
Height and be allowed to come to setting height, while type variable electric capacity C values are recovered to original value.Cup 1, mozzle 11, casting mold
12 and buoyancy aid 31 made using high-purity high-density degree graphite or carborundum, conductor 10, detection pole plate 72 and conductive rod 71 are using high
Pure high-density graphite makes, and insulating barrier 9 is made of corundum.
Embodiment two：As shown in Figure 1, Figure 2 and Figure 4, the signal that Fig. 1 is the structural representation of the present invention, Fig. 2 is the present invention
The structural representation of the schematic diagram of processing module, Fig. 4 for the embodiment of the present invention two, wherein embodiment two are shown in application Fig. 1
The traction hot continuous casting system vertically downward of metal liquid level detecting and controlling system.Molten metal 2 is contained in cup 1, and casting mold 12 is filled
Fit over 1 bottom of cup and with 1 inner space of cup, conductor 10 through bottom of furnace body insulated fireproof insulation material and casting mold 12 simultaneously
It is conductively connected with molten metal 2, conductive rod 71 is vertically connected with detection pole plate 72, and pole plate 72 is parallel is suspended in molten metal 2 for detection
Ullage, detection pole plate 72 in addition to the one side relative with molten metal 2 is coated without resistant to elevated temperatures insulating barrier 9, conductive rod 71
With detection pole plate 72 remaining surface be coated with resistant to elevated temperatures insulating barrier 9, conductive rod 71 is fixed in body of heater, define with
The type variable electric capacity of pole plate 72 and molten metal 2 for electrode is detected, capacitance size isWherein s is detection pole plate 72
Lower surface area, δ are that 2 liquid level of molten metal is 2 liquid level of molten metal and detects pole with the distance between 72 lower surface of pole plate, ε is detected
The dielectric constant of medium between 72 lower surface of plate.Conductor 10 and conductive rod 71 are equipped with winding displacement and are connected to signal processing module
6 frequency-modulated generator 20.The surface of cup 1 is provided with the crucible 17 being connected with cup 1, and 17 bottom of crucible is provided with alignment cup 1
The discharge orifice of inner chamber, constitutes valve in 32 bottom of stopper rod insertion discharge orifice, is loaded with stand-by molten metal 18,1 He of cup in crucible 17
The outside of crucible 17 is equipped with heating element heater 16；Cup 1, crucible 17, casting mold 12, heating element heater 16, detection pole plate 72, conducting rod
Rod 71 and stopper rod 32 are placed in the body of heater built up by outer cover of steel plate and flame-proof thermal insulation material, the gold that is drawn by the outlet of casting mold 12
Category is subject to the cooling of the cooling water 15 sprayed by equipment water jetting cooler 13 and solidifies, and is pulled out with certain speed by carry-over pinch rolls 14
Casting mold.When 2 liquid level of molten metal decline or rise when, type variable electric capacity the two poles of the earth apart from δ-value change, the C values of type variable electric capacity
Respective change, variable signal will be transmitted to frequency-modulated generator 20, and heterodyne frequency modulation type capacitance measurement circuit is using type variable electric capacity as tune
A part for 20 resonant tank of frequency agitator, when input quantity changes apart from δ, causes the C values of type variable electric capacity to change, and adjusts
The frequency of oscillation of frequency agitator 20 changes, in the case where 27 keep frequency of local oscillator is constant, frequency-modulated generator 20
The buffered amplifier 21 of output signal, converter 22, intermediate frequency amplifier 23, amplitude limiter 24, descriminator 25 and terminal amplifier
Become the voltage proportional to δ or current signal after 26 process, the signal is transmitted to display 5 and signal conditioner 8, molten metal 2
The situation of change of liquid level shows that synchronous signal actuator 8 converts the signal to servo control mechanism 4 on display 5 in real time
The signal that can be executed, servo control mechanism 4 drive performs device 3 to adjust liquid level, and performs device 3 is stopper rod 32, by plug
Bar 32 declines in vertical direction or rises, and valve is realized closing or is opened, and then adjusts the height of 2 liquid level of molten metal simultaneously
Setting height is allowed to come to, while type variable electric capacity C values are recovered to original value.Cup 1, casting mold 12, crucible 17 and stopper rod 32
Made using high-purity high-density degree graphite or carborundum, conductor 10, detection pole plate 72 and conductive rod 71 adopt high-purity high-density degree stone
Ink makes, and insulating barrier 9 is made using corundum.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme, its all should cover in the middle of the scope of the claim and description of the present invention.
Claims (6)
1. a kind of metal liquid level detection control apparatus for hot-mold continuous cast, it is characterised in that：Including detecting pole plate, signal processing
Module, display device, signal conditioner, servo control mechanism and performs device, the detection pole plate are located at molten metal ullage, shape
Into to detect the type variable electric capacity of pole plate and molten metal as electrode, detection pole plate and molten metal are conductively connected in the signal processing
The signal input part of module, the signal output part of signal processing module is respectively with signal conditioner and for showing that real-time liquid level is high
The display device of degree is conductively connected；The signal conditioner be connected to the signal output part of signal processing module and servo control mechanism it
Between；When molten metal liquid level changes, the signal processing module is carried out after receiving the signal of type variable electric capacity C value changes
Process and signal is sent by signal output part, be transmitted to the display device and signal conditioner, after processing through signal conditioner
Signal is transmitted to servo control mechanism, and the servo control mechanism drives performs device, and then adjusts molten metal liquid level by performs device,
The height for setting is allowed to come to, while the type variable electric capacity C values are recovered to original value.
2. the metal liquid level detection control apparatus for hot-mold continuous cast according to claim 1, it is characterised in that：The spy
The conductive rod of connection one on pole plate is surveyed, conductive rod is perpendicular to detection pole plate.
3. the metal liquid level detection control apparatus for hot-mold continuous cast according to claim 2, it is characterised in that：The spy
The side surface for surveying position of the pole plate in addition to bottom surface and conductive rod is equipped with insulating barrier.
4. the metal liquid level detection control apparatus for hot-mold continuous cast according to claim 3, it is characterised in that：The spy
Survey pole plate parallel with molten metal liquid level.
5. the metal liquid level detection control apparatus for hot-mold continuous cast according to claim 1, it is characterised in that：The letter
Number processing module includes local oscillator, frequency-modulated generator, buffer amplifier, converter, intermediate frequency amplifier, amplitude limiter, frequency discrimination
Device and terminal amplifier, and connect to form heterodyne frequency modulation type capacitance measurement circuit.
6. the metal liquid level detection control apparatus for hot-mold continuous cast according to claim 1, it is characterised in that：Described hold
Luggage is set to the stopper rod for being immersed in the buoyancy aid below metal bath surface or control molten metal source break-make by servo control mechanism driving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611059410.9A CN106493330B (en) | 2016-11-25 | 2016-11-25 | Metal liquid level detection control apparatus for hot-mold continuous cast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611059410.9A CN106493330B (en) | 2016-11-25 | 2016-11-25 | Metal liquid level detection control apparatus for hot-mold continuous cast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106493330A true CN106493330A (en) | 2017-03-15 |
| CN106493330B CN106493330B (en) | 2018-08-03 |
Family
ID=58327917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611059410.9A Active CN106493330B (en) | 2016-11-25 | 2016-11-25 | Metal liquid level detection control apparatus for hot-mold continuous cast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106493330B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586885A (en) * | 2019-10-24 | 2019-12-20 | 广东工业大学 | Automatic liquid supplementing device |
| CN113092871A (en) * | 2021-03-19 | 2021-07-09 | 北京航空航天大学 | Capacitance measuring method based on electrostatic self-excited vibration principle |
| CN113477920A (en) * | 2021-07-07 | 2021-10-08 | 上海交通大学 | Molten metal filling node monitoring device and method and anti-gravity casting equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1347779A (en) * | 2001-09-29 | 2002-05-08 | 甘肃工业大学 | Metal liquid level detecting and controlling unit for hot continuous casting |
| CN201120462Y (en) * | 2007-10-26 | 2008-09-24 | 上海大学 | Molten metal position control device in hot continuous casting technique |
| CN202137351U (en) * | 2011-05-27 | 2012-02-08 | 上海智诚电讯材料有限公司 | Heated mold continuous casting liquid supplementation and liquid level control device |
| JP2014008533A (en) * | 2012-07-03 | 2014-01-20 | Nippon Steel & Sumitomo Metal | Method and device for controlling molten metal surface level in mold of continuous casting machine |
-
2016
- 2016-11-25 CN CN201611059410.9A patent/CN106493330B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1347779A (en) * | 2001-09-29 | 2002-05-08 | 甘肃工业大学 | Metal liquid level detecting and controlling unit for hot continuous casting |
| CN201120462Y (en) * | 2007-10-26 | 2008-09-24 | 上海大学 | Molten metal position control device in hot continuous casting technique |
| CN202137351U (en) * | 2011-05-27 | 2012-02-08 | 上海智诚电讯材料有限公司 | Heated mold continuous casting liquid supplementation and liquid level control device |
| JP2014008533A (en) * | 2012-07-03 | 2014-01-20 | Nippon Steel & Sumitomo Metal | Method and device for controlling molten metal surface level in mold of continuous casting machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586885A (en) * | 2019-10-24 | 2019-12-20 | 广东工业大学 | Automatic liquid supplementing device |
| CN113092871A (en) * | 2021-03-19 | 2021-07-09 | 北京航空航天大学 | Capacitance measuring method based on electrostatic self-excited vibration principle |
| CN113092871B (en) * | 2021-03-19 | 2022-02-22 | 北京航空航天大学 | Capacitance measuring method based on electrostatic self-excited vibration principle |
| CN113477920A (en) * | 2021-07-07 | 2021-10-08 | 上海交通大学 | Molten metal filling node monitoring device and method and anti-gravity casting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106493330B (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106493330A (en) | Metal liquid level detection control apparatus for hot-mold continuous cast | |
| CN102759416B (en) | Continuous temperature measuring device and method during directional solidification | |
| CN102337565B (en) | Liquid level detection and control device for enclosed electrolytic cell | |
| JPS6186426A (en) | Material melting method and facilities | |
| CN101905296B (en) | Device and method for controlling liquid level of liquid electroslag continuous casting slag pool | |
| CN211392107U (en) | Storage equipment is used in emulsion explosive production | |
| CN103586442A (en) | Device capable of continuously measuring temperature of metal melt in pulse magnetic oscillation processing technology | |
| CN204058565U (en) | For the refrigerating unit of vacuum consumable electrode arc furnace water jacket type crystallizer | |
| CN206431493U (en) | A kind of vertical type semi-continuous casting crystallizer liquid-level measuring-controlling apparatus | |
| CN105157787A (en) | Method for measuring liquid level of yellow phosphorus in storage tank and device | |
| CN102730697B (en) | System and method for purifying polysilicon through continuous slagging under electric field | |
| CN106545990A (en) | Variable-frequency electromagnetic heating and energy saving system | |
| CN201184829Y (en) | Detection heater for crystallizer electric thermo-couple | |
| CN217298034U (en) | Electrolytic tank for preparing nitrogen trifluoride gas | |
| CN108693207A (en) | The devices and methods therefor of interface heat flux density during metal Sub realizable fuzzy matrix is measured under a kind of control climate | |
| US5394749A (en) | Method and apparatus for detecting the position of fluid-fluid interfaces | |
| CN208772450U (en) | A kind of multi-functional stopper | |
| CN203587196U (en) | Novel automatic-flowing asphalt weighing device | |
| CN203429052U (en) | Continuous melting furnace for producing large-size quartz plate | |
| CN220977039U (en) | Blast furnace iron amount difference measuring device | |
| JP3094904B2 (en) | Apparatus and method for melting and solidifying material | |
| CN217465871U (en) | Orifice plate type flowmeter capable of avoiding freezing | |
| CN216926673U (en) | Detection system for continuous casting ladle slag | |
| CN215373486U (en) | Closed clean heat preservation furnace for multi-bin feeding aluminum alloy smelting | |
| CN219245423U (en) | Equal liquid level measuring crucible for measuring high-temperature slag conductivity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |