CN209166587U - A kind of liquid level detection device and metal base vertical continuous casting equipment - Google Patents
A kind of liquid level detection device and metal base vertical continuous casting equipment Download PDFInfo
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- CN209166587U CN209166587U CN201821809878.XU CN201821809878U CN209166587U CN 209166587 U CN209166587 U CN 209166587U CN 201821809878 U CN201821809878 U CN 201821809878U CN 209166587 U CN209166587 U CN 209166587U
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Abstract
A kind of liquid level detection device and metal base vertical continuous casting equipment, the liquid level that the probe movement mechanism of liquid level detection device is used to that probe to be driven to hold indoor molten metal with respect to the liquid storage of continuous casting equipment moves back and forth, the displacement information of probe is simultaneously sent to controller by the displacement information of probe location detection device real-time detection probe, when the moment that probe is contacted with the liquid level that liquid storage holds indoor molten metal, electric signal breakover detecting device, probe and continuous casting equipment will form primary Ioops, and electric signal breakover detecting device will test to circuit and information be connected, and circuit conducting information is sent to controller, the displacement information of information and probe is connected according to circuit to judge that the liquid storage of continuous casting equipment holds the liquid level of indoor molten metal in controller.The liquid level detection device can realize effective detection to metal belt liquid level, and then guarantee that vertical continuous casting equipment can smoothly cast out the metal base of high quality.
Description
Technical field
The utility model relates to metal stock production fields, in particular to a kind of liquid level detection device and metal base
Vertical continuous casting equipment.
Background technique
In continuously casting production, the liquid level of the metal belt in the condition of high temperature is carried out automatically controlling, can be made
Crystallizer inner metal liquid position height is relatively stable, effectively reduces or eliminates the surface defects such as coarse-grain layer, pile displacement, make ingot casting surface
It is as flat and smooth as possible, the defects of reducing ingot casting thick poor, internal shrinkage, improve the quality of slab.
Realize liquid automatic control premise is that automatic, continuous, accurate, reliable, economic acquisition liquid level
Data carry out closed-loop control to liquid level by automatic Control Systems of Liquids Height.So during continuous casting of metal, effectively
Liquid-level detecting method and reliable liquid level data be realize liquid automatic control premise.
Traditional metal bath surface height detection method is divided into: contact type measurement and non-contact measurement.
Contact measurement method generally uses liquidometer, specifically has: floating ball lever meter, magnetic double level gauge, ultrasonic solution
Position meter, capacitance level gauge etc..
Contactless measurement generally uses: calculating method, actinobolia, laser method.
One of calculating method is to inject the difference of flow and output flow according to crystallizer, then be scaled liquid level height value；
The two of calculating method are the weight change value of crystallizer entirety to be detected with weight sensor, then be scaled liquid level height value.
Actinobolia includes: to penetrate source type, infrared type, vortex patern, electromagnetic type.It penetrates source type and infrared type actinobolia and passes through ray pair
Metal bath surface reflects to obtain the elevation information of metal bath surface, and vortex patern and electromagnetic type actinobolia pass through to electric flux and magnetic flux
Amount changes to obtain the elevation information value of metal bath surface.
Laser method captures the image of metal bath surface and crystallizer inner wall intersection using sensor, records the intersection of different images
Position, and then metal bath surface height value is converted into, to detect and control metal liquid level height.
For overlength small bore metal pipe billet product, the volume of crystallization chamber is small, and liquid storage holds indoor molten metal
The fluctuation of face height is particularly significant on the influence of its quality of item, and the above traditional measurement liquid level method has respectively distinctive lack
Point, it is specific as follows.
The objective disadvantage of the prior art:
(1) contact measurement method, floating ball lever meter, magnetic double level gauge, ultrasonic level gage, capacitance type liquid level are used
The measurement body such as meter and molten metal contacts, measurement body deform because of the hot baking of high temperature, toast damage, molten metal bonding, foreign matter
The factors such as intrusion, often will appear failure；
(2) Foundry Production is to remove the harmful components such as S, P and prevent metal from aoxidizing, and needs continuously to being added in crystallizer
Covering slag keeps the thickness of correct covering slag and is orderly distributed that slab quality can be effectively improved, because of covering slag weight change
It influences, and for high-temperature metal solution, for a long time, stable, accurately measuring its flow, there are many difficulties, with this to liquid
Position height value is obtained using calculating method, and in practical application there are serious shortcomings, the error that liquid level calculates is big；It is especially heavy
Want, it is this by weight based on method, be for calculating metal belt liquid level in static container.It is right
For the crystallization apparatus of continuous shaking, the variation of essence is had occurred in use condition.The crystallization apparatus of continuous shaking is in work
Reciprocal relative motion is occurring during work always between continuous billet casting, both there is raising and lowering between two persons
More there is frictional force between the two in acceleration force.This frictional force is unstable, the no rule of size variation, this
Situation certainly will lead to the failure of weight calculating method.
(3) in continuous casting production process, with the decline of casting later period metal bath surface, due to by deflecting force of the earth (Coriolis
Power) effect, can metal bath surface generate conflux vortex, measurement result of the conflux vortex for vortex patern and electromagnetic type actinobolia
Serious interference is generated, and high speed conflux vortex generates greatly impact to peripheral electromagnetic field, influences measurement result, leads when serious
Cause the accidents such as metal liquid spilling or leakage；
(4) use penetrates source type actinobolia measurement liquid level and utilizes scintillation crystal reception device using isotope radiographic source
The ray with metal bath surface height change is received, thus detect liquid level, but this method fatal defects are that have ray radiation,
The health of worker is endangered, working environment is severe, should not use；
(5) infrared type actinobolia is suitable for unlimited pouring type when being not added covering slag, and vulnerable to shadows such as steam, smog
It rings, this mode seldom uses；
(6) liquid level is measured using laser method, made since lubricating oil etc. is added in continuous casting process of billet withdrawal into crystallizer
For lubricant, lubricating oil immerses metal bath surface from crystallizer side, and burns on metal bath surface, generates flame and smog, fire
The brightness and metal bath surface brightness of flame are close, so that the intersection of metal bath surface and crystallizer inner wall is difficult to differentiate；Smog is in black
And by part or all of image masking, this will lead to false liquid level image, so that the measurement result of metal bath surface height generates
Greatly fluctuation, causes computer that cannot provide correct control amount, and casting quality and the full-automatic continuous casting for influencing metal base are raw
It produces.
Automatic, accurate, reliable measurements are carried out to the high-temperature metal solution liquid level in the crystallizer of continuous shaking, are high temperature gold
Belong to solution tank level control system and accurate data is provided, realize effective control of metal belt liquid level, is to realize overlength small bore gold
The key link for belonging to the serialization of pipe, automation, intelligent Foundry Production, be full-automatic vertical continuous casting equipment for a long time with
Come one of the problem not yet thoroughly solved.
Utility model content
The purpose of this utility model is to provide a kind of liquid level detection device and metal base vertical continuous casting equipment, energy
It is enough accurately to obtain metal belt liquid level data in crystallizer, to realize effective control to metal belt liquid level.
The embodiments of the present invention are achieved in that
The one side of the utility model embodiment provides a kind of liquid level detection device, is applied to continuous casting equipment, described
Liquid level detection device includes probe, probe movement mechanism, probe location detection device, electric signal breakover detecting device and control
Device, the probe movement mechanism connect the probe, and the electric signal breakover detecting device is separately connected the probe and described
Continuous casting equipment, the controller are electrically connected the probe location detection device and electric signal conduction detection dress
It sets；
Wherein, the probe movement mechanism is for driving in the liquid storage room of the relatively described continuous casting equipment of the probe
The liquid level of molten metal move back and forth, the displacement information of probe described in the probe location detection device real-time detection simultaneously will be described
The displacement information of probe is sent to the controller, contacts when the probe with the liquid level that the liquid storage holds indoor molten metal
Moment, the electric signal breakover detecting device, the probe and the continuous casting equipment will form primary Ioops, and the telecommunications
Number breakover detecting device will test the circuit conducting information, and circuit conducting information is sent to the controller,
The displacement information of information and the probe is connected according to the circuit to judge the continuous casting equipment in the controller
Liquid storage holds the liquid level of indoor molten metal.
Optionally, the probe motion is intermittent reciprocating motion, after probe touches metal bath surface conducting electric signal
Liquid level is left, liquid level is then contacted again, leaves liquid level again after electric signal conducting, and so on move.
Optionally, the probe includes probe and connecting rod, and the probe is made of conductive material resistant to high temperature；It is described
Probe and the connecting rod insulate connection and to be electrically connected with the electric signal breakover detecting device, the connecting rod respectively with the spy
Hand position detecting device is connected with the probe movement mechanism.
Optionally, the displacement of the probe includes angular displacement, straight-line displacement and electric signal relevant to displacement, magnetic flux
Measure signal, optical signal, pulse signal.
Optionally, the driving method of the probe movement mechanism is machine driving, motor drive, hydraulic drive, pneumatic biography
One of dynamic, electromagnetic drive.
Optionally, probe motion described in the probe movement mechanism Continuous Drive, the probe move downward and the storage
Electric signal is connected when liquid holds the contact of indoor metal bath surface, and the electric signal breakover detecting device sender gives the controller.
Optionally, the probe moves downward when holding indoor metal bath surface contact electric signal with the liquid storage and being connected, institute
The shift value that probe location detection device detects the probe is stated, and handling is that metal bath surface height value is transmitted to controller.
Optionally, the controller continuously records the metal bath surface height value in the fixed period, to metal bath surface
Height is continuously detected.
It optionally, further include the bracket being fixed in liquid storage crystallization device assembly, the probe movement mechanism is set to bracket
On, bracket is fixed on liquid storage room.
A kind of metal base vertical continuous casting equipment, including above-mentioned liquid level detection device.
As described above, liquid level detection device provided herein, is fed back by probe location detection device to controller
Liquid level information, so that controller can accurately obtain metal belt liquid level data in crystallizer, with realization pair
Effective control of metal belt liquid level, and then guarantee that vertical continuous casting equipment can cast out the metal base or gold of better quality
Belong to pipe.
The beneficial effect of the utility model embodiment includes:
(1) metal bath surface electric signal conduction method, probe and metal bath surface discontinuous connection are contacted using probe motion, visited
Needle movement is reliable, is not in card resistance failure；
(2) when probe is moved to metal bath surface direction, the interference of nonmetallic covering slag is excluded, metal liquid is directly detected
Surface, measurement are accurate；
(3) the continuous mechanical movement of probe, the factors such as electrostatic, vortex, strong magnetic, which continuously move probe, not to be influenced,
Strong antijamming capability；
(4) when metal bath surface generates conflux vortex, probe touches the metal bath surface in conflux vortex centre, Bu Huijian
Minimum liquid level or highest liquid level are measured, not will lead to the accidents such as metal liquid spilling or leakage；
(5) liquid level electric signal conduction method is contacted using probe motion, the body for endangering worker without ray radiation etc. is strong
The factor of health, work circumstances safe, environmental protection；
(6) liquid level electric signal conduction method is contacted using probe motion, is not influenced by steam, flame, smog etc., molten metal
The measurement result of face height is stablized, and liquid level can be correctly controlled；
(7) detection device is fixed on liquid storage crystallization component, and probe moves simultaneously with liquid storage room, is not transported by metal liquid
Reason is plain and influences the measurement of metal bath surface height；
(8) this measuring device has the effects that heat-insulated, damping far from hot environment, and probe motion is reliable, the telecommunications of transmission
Number and probe shift value it is accurate, metal belt liquid level is effectively controlled, realize overlength small bore metal pipe billet serialization, from
Dynamicization, intelligent Foundry Production.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the use state of an embodiment of the present invention fluid level control device with reference to figure；
Fig. 2 is the working principle diagram of an embodiment of the present invention fluid level control device；
Fig. 3 is the functional block diagram of an embodiment of the present invention fluid level control device.
Icon: 1- probe；2- electric signal breakover detecting device；3- probe location detection device；4- controller；5- fluid injection control
Device processed；6- probe movement mechanism；7- continuous casting equipment；The liquid level of 71- molten metal.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that term " center ", " upper ", " under ", " left side ", " right side ", " perpendicular
Directly ", " level ", " interior ", " outside " orientation or positional relationship of instructions is waited to be based on the orientation or positional relationship shown in the drawings, or
The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area
Divide description, is not understood to indicate or imply relative importance.
In addition, term " level ", " vertical " equal terms are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if " level " only refers to that its direction is more horizontal with respect to for " vertical "
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " be connected ", " connection " it shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
Embodiment
Incorporated by reference to referring to figs. 1 to Fig. 3, this programme provides a kind of liquid level detection device, is applied to continuous casting equipment 7, should
Liquid level detection device is allowed to contact and leave repeatedly with metal bath liquid level using 1 back and forth movement of probe, realizes electric signal conducting
And disconnection, while displacement when probe 1 is connected is recorded, displacement when probe 1 is connected controller 4 is handled as metal bath surface height
Value, thus continuous accurately measurement metal bath surface height.
The liquid level detection device includes probe 1, probe movement mechanism 6, probe location detection device 3, electric signal conducting inspection
Device 2 and controller 4,6 linking probe 1 of probe movement mechanism are surveyed, electric signal breakover detecting device 2 is separately connected probe 1 and connects
Continuous Casting Equipment 7, controller 4 are electrically connected probe location detection device 3 and electric signal breakover detecting device 2；Wherein, probe
The liquid level 71 that movement mechanism 6 is used to that probe 1 to be driven to hold indoor molten metal with respect to the liquid storage of continuous casting equipment 7 moves back and forth,
The displacement information of probe 1 is simultaneously sent to controller 4 by the displacement information of 3 real-time detection probe 1 of probe location detection device, works as spy
The moment that needle 1 is contacted with the liquid level 71 that liquid storage holds indoor molten metal, electric signal breakover detecting device 2, probe 1 and continuously casting
Equipment 7 will form primary Ioops, and electric signal breakover detecting device 2 will test to circuit and information is connected, and information is connected in circuit
It is sent to controller 4, the displacement information of information and probe 1 is connected according to circuit to judge continuous casting equipment 7 in controller 4
Liquid storage holds the height of the liquid level 71 of indoor molten metal.
Liquid level detection device provided herein feeds back liquid level to controller 4 by probe location detection device 3
Information, so that controller 4 can accurately obtain metal belt liquid level data in crystallizer to fluid injection control device 5,
To realize effective control to metal belt liquid level, and then guarantee that vertical continuous casting equipment can cast out the gold of better quality
Belong to base or metal tube.
The arrangement of this programme is as follows: the liquid level detection device is by probe 1, probe location detection device 3, probe motion
Mechanism 6, electric signal breakover detecting device 2, controller 4, bracket composition；Probe 1 is electrically connected with electric signal breakover detecting device 2,
Probe movement mechanism 6, electric signal breakover detecting device 2 and probe location detection device 3 are electrically connected with controller 4 respectively；Probe
1, probe location detection device 3, probe movement mechanism 6 are set to bracket, and bracket is fixed on liquid storage crystallization device assembly.
The embodiment of this programme is as follows: the probe movement mechanism 6 drives the continuous back and forth movement of the probe 1, described
Probe 1 is moved downwardly to probe and contacts with measured metal bath liquid level position, and probe 1, liquid storage hold indoor metal at this time
Melt, 2 three of electric signal breakover detecting device form closed circuit, and electric signal breakover detecting device 2 detects that this primary Ioops closes
The electric signal of conjunction is simultaneously transmitted to controller 4；In electric signal conducting, controller 4 records probe displacement detector 3 and detects probe
1 displacement data, and this displacement data is analyzed and is calculated metal bath surface altitude information, thus to metal bath surface
Height carries out continuous cycles detection.
The probe 1 is made of probe, connecting rod；The probe is made of conductive metal resistant to high temperature, exhausted with connecting rod
Edge connection, is electrically connected with electric signal breakover detecting device 2；The connecting rod respectively with probe location detection device 3 and probe motion
Mechanism 6 connects.
Probe 1 described in 6 Continuous Drive of probe movement mechanism movement, the probe 1 move downward in liquid storage room
Metal bath surface contact when, electric signal conducting, 2 sender of electric signal breakover detecting device is to controller 4.
The probe location detection device 3 continuously detects the displacement of the probe 1 and shift value is transmitted to controller 4, when
When electric signal is connected, the shift value of the probe 1 of the record of controller 4 at this time, and handling is metal bath surface height value, thus right
Metal bath surface height carries out continuous cycles detection.
The probe 1, probe location detection device 3, probe movement mechanism 6 are set to bracket, and bracket is fixed on liquid storage knot
Brilliant device assembly appropriate location, bracket have the effects that heat-insulated, damping, guarantee the smoothly movement of probe 1, and reliable detection liquid level is high
Degree, issues accurate liquid level signal, automatic to realize vertical continuous casting production, guarantees the castability of metal base.
The implementation process of this programme is as follows:
Liquid level setting procedure: according to liquid storage room depth of inner cavity, probe 1 probe in initial position relative to
The vertical displacement of the distance, probe 1 of liquid storage room inner cavity, can determine the liquid level of metal bath in liquid storage room.
Motion frequency setting procedure: it according to the response frequency of the controller 4, is wanted in conjunction with metal bath surface height error precision
It asks, sets the movement velocity of the probe movement mechanism 6, determine the motion frequency of probe 1.
Step: the probe movement mechanism 6 probe 1 according to the frequency Continuous Drive of setting fortune is connected in level sensing
Dynamic, the probe 1 holds indoor metal bath surface direction to liquid storage and moves, and electric signal, the control are connected when touching metal bath surface
Device 4 processed can receive electric signal Continuity signal.
Liquid level displacement calibrating step: the controller 4 receives the electric signal that the electric signal breakover detecting device 2 issues
Continuity signal, while the shift value for the probe 1 that the probe location detection device 3 exports is obtained, molten metal is obtained by calculating
Face height value, and will metal bath surface height value record and output at this time.
1 return step of probe: electric signal is connected when touching metal bath surface in the probe 1, then turns back momentarily to starting
Position.
Continuous detecting step: after 1 correcting action of probe, then hold indoor metal bath surface direction to liquid storage again
Movement executes the instruction of " contact → conducting → sender → return → contact " iterative motion, is formed to metal bath surface height
Continuous detection.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of liquid level detection device is applied to continuous casting equipment, which is characterized in that the liquid level detection device includes visiting
Needle, probe movement mechanism, probe location detection device, electric signal breakover detecting device and controller, the probe movement mechanism
The probe is connected, the electric signal breakover detecting device is separately connected the probe and the continuous casting equipment, the control
Device processed is electrically connected the probe location detection device and the electric signal breakover detecting device；
Wherein, the probe movement mechanism is used to drive the liquid storage of the relatively described continuous casting equipment of the probe to hold indoor gold
The liquid level for belonging to liquid moves back and forth, the displacement information of probe described in the probe location detection device real-time detection and by the probe
Displacement information be sent to the controller, when the wink that the probe is contacted with the liquid level that the liquid storage holds indoor molten metal
Between, the electric signal breakover detecting device, the probe and the continuous casting equipment will form primary Ioops, and the electric signal
Breakover detecting device will test the circuit conducting information, and circuit conducting information is sent to the controller, institute
It states controller and the displacement information of information and the probe is connected to judge the storage of the continuous casting equipment according to the circuit
Liquid holds the liquid level of indoor molten metal.
2. liquid level detection device according to claim 1, which is characterized in that the probe motion is intermittent reciprocal fortune
Dynamic, probe leaves liquid level after touching metal bath surface conducting electric signal, is then contacted again liquid level, after electric signal conducting again
Liquid level is left, is and so on moved.
3. liquid level detection device according to claim 2, which is characterized in that the probe includes probe and connecting rod, institute
Probe is stated to be made of conductive material resistant to high temperature；The probe insulate with the connecting rod to be connected and is connected with the electric signal
Detection device electrical connection, the connecting rod are connect with the probe location detection device and the probe movement mechanism respectively.
4. liquid level detection device according to claim 3, which is characterized in that the displacement of the probe include angular displacement,
Straight-line displacement and electric signal relevant to displacement, flux signal, optical signal, pulse signal.
5. liquid level detection device according to claim 1, which is characterized in that the driving method of the probe movement mechanism is
One of machine driving, motor drive, hydraulic drive, pneumatic gearing, electromagnetic drive.
6. liquid level detection device according to claim 3, which is characterized in that described in the probe movement mechanism Continuous Drive
Probe motion, the probe move downward electric signal when contacting with the indoor metal bath surface of liquid storage appearance and are connected, the telecommunications
Number breakover detecting device sender gives the controller.
7. liquid level detection device according to claim 6, which is characterized in that the probe is moved downward to be held with the liquid storage
When indoor metal bath surface contact electric signal conducting, the probe location detection device detects the shift value of the probe, and
Processing is that metal bath surface height value is transmitted to controller.
8. liquid level detection device according to claim 6, which is characterized in that the controller is continuously remembered in the fixed period
The metal bath surface height value is recorded, continuously to be detected to metal bath surface height.
9. liquid level detection device according to claim 1, which is characterized in that further include being fixed in liquid storage crystallization device assembly
Bracket, the probe movement mechanism is set on bracket, and bracket is fixed on liquid storage room.
10. a kind of metal base vertical continuous casting equipment, which is characterized in that including described in any one of claim 1-9
Liquid level detection device.
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| CN201821809878.XU CN209166587U (en) | 2018-11-02 | 2018-11-02 | A kind of liquid level detection device and metal base vertical continuous casting equipment |
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| CN201821809878.XU CN209166587U (en) | 2018-11-02 | 2018-11-02 | A kind of liquid level detection device and metal base vertical continuous casting equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238398A (en) * | 2018-04-25 | 2019-01-18 | 西安麦特沃金液控技术有限公司 | A kind of liquid level detection device and liquid-level detecting method |
| CN110593851A (en) * | 2019-09-03 | 2019-12-20 | 中国海洋石油集团有限公司 | Metering device and metering method for stratum high-temperature high-pressure gas-water phase permeation experiment |
-
2018
- 2018-11-02 CN CN201821809878.XU patent/CN209166587U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238398A (en) * | 2018-04-25 | 2019-01-18 | 西安麦特沃金液控技术有限公司 | A kind of liquid level detection device and liquid-level detecting method |
| CN110593851A (en) * | 2019-09-03 | 2019-12-20 | 中国海洋石油集团有限公司 | Metering device and metering method for stratum high-temperature high-pressure gas-water phase permeation experiment |
| CN110593851B (en) * | 2019-09-03 | 2022-12-09 | 中国海洋石油集团有限公司 | Metering device and metering method for stratum high-temperature high-pressure gas-water phase permeation experiment |
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