CN107870185A - Powdery type solid concentration real-time measurement apparatus and method in a kind of liquid - Google Patents
Powdery type solid concentration real-time measurement apparatus and method in a kind of liquid Download PDFInfo
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- CN107870185A CN107870185A CN201711382278.XA CN201711382278A CN107870185A CN 107870185 A CN107870185 A CN 107870185A CN 201711382278 A CN201711382278 A CN 201711382278A CN 107870185 A CN107870185 A CN 107870185A
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- 239000007788 liquid Substances 0.000 title claims abstract description 82
- 239000007787 solid Substances 0.000 title claims abstract description 57
- 238000005259 measurement Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 238000000926 separation method Methods 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 19
- 239000007790 solid phase Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The invention provides powdery type solid concentration real-time measurement apparatus and method in a kind of liquid, including pipeline, motor drive assembly, controller, voltage sensor, current sensor and temperature sensor, motor drive assembly is provided with inside the pipeline, the motor drive assembly is built with motor, motor drive assembly upper end is connected with impeller, the controller is located at pipeline external, and motor, voltage sensor, current sensor and temperature sensor are connected on controller.The invention is simple to operate, dependable performance, monitor the temperature of the voltage of motor, electric current and liquid in real time by controller, realize the solid concentration in monitoring liquid in real time, power and liquid solid concentration one-to-one relationship are established for different liquids, power is converted to the solid concentration of liquid by controller, controller can directly display data and be transferred to other control terminals.
Description
Technical field
The present invention relates to oil movement and storage technical field, and in particular to powdery type solid concentration measures dress in real time in a kind of liquid
Put and method.
Background technology
At present during oil movement and storage, it is sometimes desirable to powdery type solid concentration numerical value in liquid is grasped in real time, to adopt
Take countermeasure, and existing liquid solid concentration measurement apparatus, solid concentration is accurately all measured using sampling weight method, can not
Measurement in real time is realized, such as patent " heating furnace for catalytic oil syrup solid content measuring instrument "（Publication number：CN2630852Y）, patent " one kind
Determination of solid content instrument "（Publication number：CN202757858U）And patent " "（Publication number：CN103196776B）Deng.For current
Problem, powdery type solid concentration real-time measurement apparatus in a kind of liquid is devised, powdery type solid content in liquid can be realized
Measurement in real time, it can be applied to powdery type solid phase in a variety of occasions, such as measurement tank bottom greasy filth solid concentration and pipeline liquid
Content etc..
The content of the invention
The purpose of the present invention is to overcome the technical problem that powdery type solid concentration can not measure in real time in liquid, there is provided a kind of
Powdery type solid concentration real-time measurement apparatus and method in liquid.
The technical scheme is that powdery type solid concentration real-time measurement apparatus in a kind of liquid is provided, including pipe
Road, motor drive assembly, controller, voltage sensor, current sensor and temperature sensor, the pipeline inside are provided with motor
Drive assembly, the motor drive assembly are connected with impeller built with motor, motor drive assembly upper end, and the controller is located at
Pipeline external, motor, voltage sensor, current sensor and temperature sensor are connected on controller.
The controller is used to power to motor, while to voltage sensor, current sensor and temperature sensor transmission
The signal to come over carries out AD collections and analysis.
The motor drive assembly includes output shaft, upper end cover, outer steel, separation sleeve, interior magnet steel, motor, bottom end cover, institute
State separation sleeve upper and lower side and be respectively equipped with upper end cover and bottom end cover, separation sleeve top is provided with a baffle plate, and separation sleeve is divided into upper and lower two
Individual sealing space, the output shaft are located at upper end cover center vertically, and the output shaft top and bottom connect impeller and outer respectively
Magnet steel, outer steel are placed in above baffle plate, and interior magnet steel and motor, the interior magnet steel connection are provided with the confined space of separation sleeve bottom
In on the motor shaft of motor, interior magnet steel is located above motor, and magnet is designed with the top of outer steel bottom and interior magnet steel.
Sealed bearings are cased with the outside of the output shaft, and sealed bearings are placed in upper end cover.
The sealed bearings are distributed with two up and down on the outside of output shaft, and two sealed bearings are all placed in upper end cover, close
Envelope bearing is non-contacting seal bearing, and it is all interference fit with output shaft and upper end cover, and interference fit face seals.
Separation sleeve periphery upper and lower side is arranged with fix bar, and the fix bar is fixed with pipeline.
The pipeline outer wall is provided with sealed wire plug, and the separation sleeve is provided with perforate, the perforate and sealed wire
Sealing passage is provided between plug, the electric wire of the motor is connected to sealed wire plug by the sealing passage.
The impeller includes two blades and the central shaft placed vertically, and described two blades are on substantially symmetrical about its central axis, and two
Individual blade is connected by support, and support is fixed on central shaft, and the central shaft bottom is connected to output shaft upper end.
The blade is the arcuate structure that radian is less than 180 °.
Further, the invention provides powdery type solid concentration method for real-time measurement in a kind of liquid, it is characterised in that：
Comprise the following steps：
Step 1, the classification of liquid of the basis containing solid phase powder establish formula Q=a (P-b)
In formula：Q is powdery type solid concentration, unit % in the liquid at a temperature of certain；
P be at a temperature of certain in the liquid for containing solid phase powder motor rotate needed for power, P=UI, unit W；；
B is that motor rotates required power, unit W in the liquid is free of solid phase powder at a temperature of certain；
A is known solid concentration conversion coefficient of the liquid at a temperature of certain；
In step 2, the Formula Input Technology controller for being established step 1, a and b value is inputted；
Step 3, impeller is placed in the liquid that this contains solid phase powder, controller gives motor power supply, motor rotates drive in magnetic
Steel and outer steel rotate, so as to which impeller 1 rotates in the liquid for containing solid phase powder；
Step 4, voltage sensor, current sensor and temperature sensor measure real-time voltage, electric current and temperature respectively, and through letter
Breath passes to controller, and controller is that can obtain the powdery type solid concentration at a temperature of certain in the liquid according to formula.
Beneficial effects of the present invention：
Powdery type solid concentration real-time measurement apparatus is simple to operate in this liquid provided by the invention, dependable performance, passes through control
Device processed monitors the temperature of the voltage of motor, electric current and liquid in real time, and power and liquid solid concentration one are established for different liquids
One corresponding relation, is converted to power by controller the solid concentration of liquid, and controller can directly display data and transmission
Give other controls, the real-time measurement of liquid solid concentration is realized at end, and motor drive assembly use closed structure, by outer steel with
Interior magnet steel forms magnetic coupling passing power, protects motor not corroded by powder, is monitored in real time in the whipping process of impeller
Solid concentration in liquid.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of powdery type solid concentration real-time measurement apparatus in fluid present invention；
Fig. 2 is the structural representation of motor drive assembly of the present invention；
Fig. 3 is the structural representation of impeller of the present invention；
Fig. 4 is the electrical connection schematic diagram of the present invention.
Description of reference numerals：1st, impeller；2nd, top connection；3rd, pipeline；4th, fixed mount；5th, motor drive assembly；6th, sealing electricity
Line plug；7th, lower contact；8th, controller；9th, voltage sensor；10th, current sensor；11st, temperature sensor.
1.1 support；1.2nd, blade；1.3rd, central shaft；
5.1st, output shaft；5.2nd, sealed bearings；5.3rd, upper end cover；5.4th, outer steel；5.5th, separation sleeve；5.6th, interior magnet steel；5.7、
Motor；5.8th, baffle plate；5.9 bottom end cover.
The present invention is described in further details below with reference to specific embodiment.
Embodiment
Embodiment 1：
Present embodiments provide powdery type solid concentration real-time measurement apparatus in a kind of liquid as shown in Figures 1 to 4, including pipe
Road 3, motor drive assembly 5, controller 8, voltage sensor 9, current sensor 10 and temperature sensor 11, in the pipeline 3
Portion is provided with motor drive assembly 5, and the motor drive assembly 5 is connected with leaf built with motor 5.7, the upper end of motor drive assembly 5
Wheel 1, the controller 8 are connected to motor 5.7, voltage sensor 9, current sense outside pipeline 3 on controller 8
Device 10 and temperature sensor 11.
The operation principle of powdery type solid concentration real-time measurement apparatus is as follows in this liquid provided by the invention：
Impeller 1 is inserted in testing liquid, controller 8 is used to power to motor 5.7, and the impeller of controlled motor 5.7 rotates, electricity
Pressure sensor 9 and current sensor 10 are respectively used to the voltage and current of monitoring motor 5.7 in real time, voltage sensor 9 and electric current
Sensor 10 can be located on the electric wire between motor 5.7 and controller 8, and temperature sensor 11 is used to monitor testing liquid in real time
Temperature, be arranged as needed, can be located at impeller 1 on can also be placed directly within testing liquid, controller 8 have supply
Electricity, AD collections, analysis, transmission and the function of display, controller 8 is to voltage sensor 9, current sensor 10 and temperature sensor
11 signals passed over carry out AD collections and analysis, and result can be fed directly to other control terminals, be easy to automatically control, most
The real-time solid concentration in the liquid is obtained eventually.
Powdery type solid concentration real-time measurement apparatus is simple to operate in this liquid of the present invention, dependable performance, passes through control
Device processed monitors the temperature of the voltage of motor, electric current and liquid in real time, the consolidating in monitoring liquid in real time in the whipping process of impeller
Phase content.
Embodiment 2：
On the basis of embodiment 1, powdery type solid concentration real-time measurement apparatus in this liquid that the present embodiment provides, such as scheme
Shown in 2, the motor drive assembly 5 include output shaft 5.1, upper end cover 5.3, outer steel 5.4, separation sleeve 5.5, interior magnet steel 5.6,
Motor 5.7, bottom end cover 5.9, the upper and lower side of separation sleeve 5.5 are respectively equipped with upper end cover 5.3 and bottom end cover 5.9, on separation sleeve 5.5
Portion is provided with a baffle plate 5.8, and separation sleeve 5.5 is divided into two sealing spaces, the output shaft 5.1 up and down is located at upper end cover vertically
5.3 centers, the top and bottom of output shaft 5.1 connect impeller 1 and outer steel 5.4 respectively, and outer steel 5.4 is placed in baffle plate 5.8
Top, the confined space of the bottom of separation sleeve 5.5 is interior to be provided with interior magnet steel 5.6 and motor 5.7, and the interior magnet steel 5.6 is connected to motor
On 5.7 motor shaft, interior magnet steel 5.6 is located at the top of motor 5.7, and the bottom of outer steel 5.4 and the top of interior magnet steel 5.6 are designed with magnetic
Iron.
The motor drive assembly 5 uses closed structure, and magnetic coupling is formed by outer steel 5.4 and interior magnet steel 5.6
Passing power, motor is protected not corroded by powder.
Further, in order to ensure the steady running of output shaft 5.1, the outside of output shaft 5.1 is cased with sealed bearings 5.2,
And sealed bearings 5.2 are placed in upper end cover 5.3.
Further, the sealed bearings 5.2 are distributed with two up and down in the outside of output shaft 5.1, two sealed bearings
5.2 are all placed in upper end cover 5.3, and sealed bearings 5.2 are non-contacting seal bearing, its with output shaft 5.1 and upper end cover 5.3 all
For interference fit, interference fit face seals, i.e., stable to ensure sealing again.
Further, in order to ensure the steady running of motor drive assembly 5, the periphery upper and lower side pair of separation sleeve 5.5
Title is provided with fix bar 4, and the fix bar 4 is fixed with pipeline 3.
In order to be further ensured that sealing, the upper end cover 5.3 and bottom end cover 5.9 are provided with close between separation sleeve 5.5 respectively
Sealing.
Embodiment 3：
On the basis of embodiment 1, powdery type solid concentration real-time measurement apparatus in this liquid that the present embodiment provides, enter one
Step, the outer wall of pipeline 3 is provided with sealed wire plug 6, and the separation sleeve 5.5 is provided with perforate, the perforate and sealing electricity
Sealing passage is provided between line plug 6, the electric wire of the motor 5.7 is connected to sealed wire plug 6 by the sealing passage.It is close
Envelope wire and plug 6 is a kind of sealed fast plug that can be pressure-resistant, between the perforate of separation sleeve 5.5 and sealed wire plug 6
Electric wire, the inside and outside pressure with inside and outside separation sleeve of isolation pipeline are placed provided with sealing passage, the electric wire of motor 5.7 is inserted by sealed wire
First 6 connect with controller 8, current sensor 10 respectively, and, voltage sensor 9 and current sensor in parallel with voltage sensor 9
10 are connected simultaneously with controller 8, and temperature sensor 11. is also associated with controller 8
Embodiment 4：
On the basis of embodiment 1, powdery type solid concentration real-time measurement apparatus in this liquid that the present embodiment provides, such as scheme
Shown in 3, the impeller 1 includes two blades 1.2 and the central shaft 1.3 placed vertically, and described two blades 1.2 are on central shaft
1.3 is symmetrical, and two blades 1.2 are connected by support 1.1, and support 1.1 is fixed on central shaft 1.3, the bottom of central shaft 1.3
It is connected to the upper end of output shaft 5.1.
The blade 1.2 is the arcuate structure that radian is less than 180 °, and the thickness of blade 1.2 is small, and its support 1.1 is very thin, rotation
The adhesion strength by liquid is more beneficial for when turning, and unprovoked stirs the liquid propulsive thrust being subject to, while avoid as far as possible because stirring
It is dynamic to form whirlpool, cause powder all to assemble to outer and influence measurement result.
Further, the upper and lower ends of the pipeline 3 are connected to upper flange 2 and lower flange 7, and up and down the two of pipeline 3
End can symmetrically connect impeller 1, and upper and lower side carries out the measurement of liquid solid concentration, the upper end of upper flange 2 and washer respectively
Or outlet(discharge) flange is connected under tank, impeller 1 can be stretched into washer or tank, and impeller 1 is submerged in testing liquid upper surface, also can be with
Pipe flange is connected.The lower end of lower flange 7 is connected with other multi-purpose station pipelines as needed, or is directly connected to blank flange.
Embodiment 5：
Present embodiments provide powdery type solid concentration method for real-time measurement in a kind of liquid, it is characterised in that：Including following step
Suddenly：
Step 1, the classification of liquid of the basis containing solid phase powder establish formula Q=a (P-b)
In formula：Q is powdery type solid concentration, unit % in the liquid at a temperature of certain；
P be at a temperature of certain in the liquid for containing solid phase powder motor rotate needed for power, unit W；P is passed by voltage
Sensor 9 and current sensor 10 measure voltage and obtain P=UI with Current calculation in real time；
B is that when the liquid is free of solid phase powder, motor rotates required power at a temperature of certain, unit W, can pass through experiment
Measure；
A is known solid concentration conversion coefficient of the liquid at a temperature of certain, can be measured by experiment, can be in advance using weighing
The mode for detecting the liquid solid content measures Q values, then the P and b known to, calculates to obtain a values, then known parameters will be used as defeated
Enter equation monitoring powdery type solid concentration in the liquid at a temperature of certain in real time；
In step 2, the Formula Input Technology controller 8 for being established step 1, a and b value is inputted；
Step 3, impeller 1 is placed in the liquid that this contains solid phase powder, controller 8 is powered to motor 5.7, and motor 5.7 rotates
Magnet steel 5.6 and outer steel 5.4 rotate in drive, so as to which impeller 1 rotates in the liquid for containing solid phase powder；
Step 4, voltage sensor 9, current sensor 10 and temperature sensor 11 measure real-time voltage, electric current and temperature respectively,
And through information transmission to controller 8, controller 8 is that the powdery type solid phase that can obtain at a temperature of certain in the liquid contains according to formula
Amount.
Powdery type solid concentration method for real-time measurement establishes power and liquid for different liquids in this liquid of the present invention
Body solid concentration one-to-one relationship, is converted to power by controller the solid concentration of liquid, and controller can directly show
Registration evidence and it is transferred to other control terminals.
It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (10)
- A kind of 1. powdery type solid concentration real-time measurement apparatus in liquid, it is characterised in that：Including pipeline（3）, motor transmission it is total Into（5）, controller（8）, voltage sensor（9）, current sensor（10）And temperature sensor（11）, the pipeline（3）It is internal Provided with motor drive assembly（5）, the motor drive assembly（5）Built with motor（5.7）, motor drive assembly（5）Upper end connects It is connected to impeller（1）, the controller（8）Located at pipeline（3）Outside, controller（8）On be connected to motor（5.7）, voltage Sensor（9）, current sensor（10）And temperature sensor（11）.
- 2. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 1, it is characterised in that：The controller （8）For to motor（5.7）Power supply, while to voltage sensor（9）, current sensor（10）And temperature sensor（11）Transmit The signal to come over carries out AD collections and analysis.
- 3. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 1, it is characterised in that：The motor passes Dynamic assembly（5）Including output shaft（5.1）, upper end cover（5.3）, outer steel（5.4）, separation sleeve（5.5）, interior magnet steel（5.6）, motor （5.7）, bottom end cover（5.9）, the separation sleeve（5.5）Upper and lower side is respectively equipped with upper end cover（5.3）And bottom end cover（5.9）, isolation Set（5.5）Top is provided with a baffle plate（5.8）, by separation sleeve（5.5）It is divided into two sealing spaces up and down, the output shaft（5.1） It is located at upper end cover vertically（5.3）Center, the output shaft（5.1）Top and bottom connect impeller respectively（1）And outer steel （5.4）, outer steel（5.4）It is placed in baffle plate（5.8）Top, separation sleeve（5.5）Interior magnet steel is provided with the confined space of bottom（5.6） And motor（5.7）, the interior magnet steel（5.6）It is connected to motor（5.7）Motor shaft on, interior magnet steel（5.6）Positioned at motor（5.7） Top, outer steel（5.4）Bottom and interior magnet steel（5.6）Top is designed with magnet.
- 4. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 3, it is characterised in that：The output shaft （5.1）Outside is cased with sealed bearings（5.2）, and sealed bearings（5.2）It is placed in upper end cover（5.3）It is interior.
- 5. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 4, it is characterised in that：The seal shaft Hold（5.2）In output shaft（5.1）Outside is distributed with two up and down, two sealed bearings（5.2）It is all placed in upper end cover（5.3）It is interior, Sealed bearings（5.2）For non-contacting seal bearing, itself and output shaft（5.1）And upper end cover（5.3）All it is interference fit, interference Mating surface seals.
- 6. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 3, it is characterised in that：The separation sleeve （5.5）Periphery upper and lower side is arranged with fix bar（4）, the fix bar（4）With pipeline（3）It is fixed.
- 7. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 3, it is characterised in that：The pipeline （3）Outer wall is provided with sealed wire plug（6）, the separation sleeve（5.5）It is provided with perforate, the perforate and sealed wire plug （6）Between be provided with sealing passage, the motor（5.7）Electric wire sealed wire plug is connected to by the sealing passage（6）.
- 8. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 1, it is characterised in that：The impeller （1）Including two blades（1.2）The central shaft placed vertically（1.3）, described two blades（1.2）On central shaft（1.3） Symmetrically, two blades（1.2）Pass through support（1.1）Connection, support（1.1）It is fixed on central shaft（1.3）On, the central shaft （1.3）Bottom is connected to output shaft（5.1）Upper end.
- 9. powdery type solid concentration real-time measurement apparatus in liquid as claimed in claim 8, it is characterised in that：The blade （1.2）It is less than 180 ° of arcuate structure for radian.
- A kind of 10. powdery type solid concentration method for real-time measurement in liquid, it is characterised in that：Comprise the following steps：Step 1, the classification of liquid of the basis containing solid phase powder establish formula Q=a (P-b)In formula：Q is powdery type solid concentration, unit % in the liquid at a temperature of certain；P be at a temperature of certain in the liquid for containing solid phase powder motor rotate needed for power, P=UI, unit W；B is that motor rotates required power, unit W in the liquid is free of solid phase powder at a temperature of certain；A is known solid concentration conversion coefficient of the liquid at a temperature of certain；Step 2, the Formula Input Technology controller for being established step 1（8）In, input a and b value；Step 3, by impeller（1）It is placed in the liquid that this contains solid phase powder, controller（8）To motor（5.7）Power supply, motor （5.7）Rotate magnet steel in driving（5.6）And outer steel（5.4）Rotate, so as to impeller（1）In the liquid that this contains solid phase powder Rotated in body；Step 4, voltage sensor（9）, current sensor（10）And temperature sensor（11）Measure respectively real-time voltage, electric current and Temperature, and through information transmission to controller（8）, controller（8）It is that can obtain the powder at a temperature of certain in the liquid according to formula Class solid concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711382278.XA CN107870185A (en) | 2017-12-20 | 2017-12-20 | Powdery type solid concentration real-time measurement apparatus and method in a kind of liquid |
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| CN201711382278.XA CN107870185A (en) | 2017-12-20 | 2017-12-20 | Powdery type solid concentration real-time measurement apparatus and method in a kind of liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680227A (en) * | 2018-07-27 | 2018-10-19 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of binocular vision level meter and its application method and the method for measuring level |
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Effective date of registration: 20201202 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710018 Shaanxi city of Xi'an province Weiyang District four road Fengcheng Changqing Technology Building Applicant before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |