CN208420604U - Dynamic density meter calibrating installation - Google Patents
Dynamic density meter calibrating installation Download PDFInfo
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- CN208420604U CN208420604U CN201821105410.2U CN201821105410U CN208420604U CN 208420604 U CN208420604 U CN 208420604U CN 201821105410 U CN201821105410 U CN 201821105410U CN 208420604 U CN208420604 U CN 208420604U
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Abstract
The utility model relates to a kind of dynamic density meter calibrating installations, including calibrating unit, circulating feeding liquid unit, constant temperature temperature conditioning unit and test cell, wherein calibrating unit is mounted as a whole in constant temperature temperature conditioning unit, circulating feeding liquid unit is connected to by circulation line with the liquid line for examining and determine unit, test cell is installed in the liquid line of calibrating unit, and the fluid temperature of acquisition, pressure, tested densitometer vibration period data are uploaded to monitoring unit；Constant temperature temperature conditioning unit is the insulating box of a controllable temperature, which constitutes a closed test space using assemble type structure；Temperature control device is equipped in insulating box.The utility model is cold controlled to provide a heat when device work, the field source of temperature homogeneous constant, steady temperature test or test are carried out to test specimen, also the heat source or cold source for directly heating or freezing and assist heating or freeze be can be used as, it is horizontal to the industry for improving China's densitometry, there is particularly important meaning.
Description
Technical field
The utility model relates to a kind of nonstandard intelligent constant-temperatures to examine and determine liquid densimeter experimental rig, and specially a kind of dynamic is close
Degree meter calibrating installation.
Background technique
Densitometry test is related to petroleum, chemical industry, metallurgy, building materials, light industry, coal, commodity inspection, medical treatment, trade and section
It is very extensive to learn numerous areas, the applications such as research.It is not only related to control of product quality in production process, detection and management,
And it is related to the promotion and development of science and technology, international trade.Whether it from the point of view of economic and technical viewpoint, accurately measures
Test density is essential.In order to guarantee that the accurate of magnitude with uniformly, requires magnitudes at different levels in national transmission of quantity value system
Transmitting accuracy to reach higher level's standard precision be higher than be passed 3 times of utensil precision or more.And existing density meter calibration device
Measurement technique compared with fall behind, calibration accuracy is low, the degree of automation is low, have been unable to meet high accuracy liquid densimeter calibrating need
It wants.
Utility model content
For density meter calibration device densitometry in the prior art, there are techniques compared with backward, calibration accuracy is low, automation
The deficiencies such as degree is low, problem to be solved in the utility model, which is to provide one kind and is able to achieve computer, to be uniformly controlled, and is managed concentratedly, is made
Verification process automation, sequencing, guarantee the dynamic density meter calibrating installation of the gentle working efficiency of temperature control water.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of dynamic density meter calibrating installation of the utility model, including calibrating unit, circulating feeding liquid unit, constant temperature temperature control list
Member and test cell, wherein calibrating unit is mounted as a whole in constant temperature temperature conditioning unit, circulating feeding liquid unit passes through circulation line
Be connected to the liquid line of calibrating unit, test cell is installed in the liquid line for examining and determine unit, and by the liquid temperature of acquisition
Degree, pressure, tested densitometer vibration period data are uploaded to monitoring unit.
Calibrating unit includes inlet dispenser, outlet distributor and standard density meter, and inlet dispenser and outlet distribute
Device is respectively arranged in the both ends of tested densitometer, and standard density is calculated as two, is respectively arranged in inlet dispenser entrance then and goes out
The outlet side of mouth distributor.
Constant temperature temperature conditioning unit is the insulating box of a controllable temperature, which constitutes one using assemble type structure
Closed test space；Temperature control device is equipped in insulating box.
Constant temperature temperature conditioning unit is multiple waters bath with thermostatic control equipped with different tested medias outside insulating box, with constant temperature
The adjacent installation of case, open piping do insulation isothermal holding.
Also there is densitometer check standard device, including liquid temperature density measure bucket, first-class glass ball float densitometer and temperature-sensitive
Thermometer, wherein liquid temperature density measure bucket is installed in constant temperature temperature conditioning unit, in liquid temperature density measure bucket and constant temperature temperature conditioning unit
Shut-off valve is installed between the liquid line of middle calibrating unit；Be equipped in liquid temperature density measure bucket first-class glass ball float densitometer with
And thermosensitive thermometer.
Test cell includes pressure test, liquid feed valve, sealing pressing device, liquid discharge device and exhaust valve, wherein
Pressure tester is set to outside the insulating box of constant temperature temperature conditioning unit, process cycles pipe in the test pipeline and insulating box of pressure tester
The connection of road, that is, detection unit liquid line, while the test pipeline is connected to sealing pressing device and liquid discharge device；Test
Liquid feed valve is installed between process pipeline in pipeline and insulating box；Exhaust valve is equipped in process pipeline eminence.
Liquid line integrally has a tilt angle, and liquid line is equipped with pipeline purging unit, and pipeline purging unit includes air pressure
Contracting machine and accumulator tank, wherein air compressor by valve with calibrating unit liquid line it is high-end be connected to, accumulator tank is installed on
On the liquid line lower position for examining and determine unit.
Circulation line between circulating feeding liquid unit, constant temperature temperature conditioning unit is equipped with visual pipeline section.
The utility model has the advantages that and advantage:
1. uncertainty of measurement≤the U=0.08kg/m of the utility model3(using water as medium), measurement standard use one
Equal glass ball floats densitometer (U=0.08kg/m3), standard vibration tube densimeter (U≤0.10kg/m3) combine desk-top densimeter (U
≤0.05kg/m3) mode, densitometer and standard density meter are vibrated to high accuracy grade and carry out measurement verification.
2. the utility model is to guarantee that room temperature, humidity can all reach calibrating environmental requirement, technique when examining and determine densitometer
Circulation line and instrument are installed in the insulating box of controllable temperature；Insulating box uses assemble type structure, directly constitutes
One closed test space, while insulating box is equipped with temperature control device.Insulating box and temperature control device technical performance index: temperature control model
Enclose (10~80) DEG C, 20 ± 0.2 DEG C of temperature-controlled precision, temperature fluctuation≤± 0.2 DEG C (zero load).
3. the utility model is equipped with multiple waters bath with thermostatic control equipped with different tested medias outside insulating box, for recycling control
Tested media circulating temperature and circulation rate processed, for cold controlled, the field source of temperature homogeneous constant that provides a heat when device work,
Steady temperature test or test are carried out to test specimen, also can be used as the heat source for directly heating or freezing and assist heating or freeze
Or cold source；Water bath with thermostatic control technical performance index: temperature-control range (10~80) DEG C, temperature-controlled precision ± 0.05 DEG C, temperature control method PID control
System, circulation diving pump discharge (0~5.3) m3/ h, work nest volume 30L.
4. being equipped with densitometer check standard device, including First class standard densitometer group, precise digital display temperature-sensitive in the utility model
Resistance thermometer and each 1 set of liquid temperature density measure bucket are just opened when needing using first-class glass density measurement density, so that survey
It is full of the tested media of appropriate amount in measuring tank, meets the temperature control requirement of First class standard densimeter measurement fluid density and close
Degree, temperature direct-reading requirement.
5. being equipped with pressure test unit in the utility model, which is the liquid (transformer using two kinds of different densities
Oil/diesel oil, pure water)/pressure release the testing inspection that pressurizes is carried out to tested densitometer, while acquiring fluid temperature, pressure, tested density
The data such as vibration period are counted, system includes connecting pipe, connecting flange, liquid feed valve, (pressure resistance is not less than sealing pressing device
6.0MPa), liquid discharge device and exhaust valve.In design, the stability and reliability of system pressurization constant pressure are considered, when necessary
Configure the supercharging equipments such as nitrogen cylinder.Pressure testing system technical performance index: device model BEAMEX MC6, range ability (0~
6) MPa, pressure measurement accuracy ± 0.025%FS (from 20kPa~6MPa).
6. high standardization, high performance and detection of the application implementation of the utility model to China's densitometry industry is pushed
Diversification, the industry for improving China's densitometry is horizontal, there is particularly important meaning.
Detailed description of the invention
Fig. 1 is utility model structural schematic diagram.
Wherein, 1 is insulating box, and 2 be water bath with thermostatic control, and 3 be shut-off valve, and 4 be pressure transmitter, and 5 be turbine flowmeter, and 6 are
Temperature transmitter, 7 be standard vibration tube densimeter, and 8 be inlet dispenser, and 9 be tested densitometer, and 10 be outlet distributor, 11
It is first-class glass ball float densitometer for liquid temperature density measure bucket, 12,13 be thermosensitive thermometer, and 14 be visual pipeline section, and 15 be desk-top
Densimeter, 16 be frequency meter, and 17 be computer control system, and 18 be air compressor, and 19 be pressure tester, and 20 match for power
Electronic box, 21 be accumulator tank, and 22 be sealing pressing device, and 23 be liquid discharge device.
Specific embodiment
The utility model is further elaborated with reference to the accompanying drawings of the specification.
A kind of dynamic density meter calibrating installation of the utility model, including calibrating unit, circulating feeding liquid unit, constant temperature temperature control list
Member and test cell, wherein calibrating unit is mounted as a whole in constant temperature temperature conditioning unit, circulating feeding liquid unit passes through circulation line
Be connected to the liquid line of calibrating unit, test cell is installed in the liquid line for examining and determine unit, and by the liquid temperature of acquisition
Degree, pressure, tested densitometer vibration period data are uploaded to monitoring unit.
As shown in Figure 1, calibrating unit includes inlet dispenser 8, outlet distributor 10, standard density meter 7, inlet dispenser
8 and outlet distributor 10 be respectively arranged in the both ends of tested densitometer 9, standard density meter 7 is two, is respectively arranged in entrance point
8 entrance of the orchestration then outlet side with outlet distributor 10.Constant temperature temperature conditioning unit is the insulating box of a controllable temperature, which uses
Assemble type structure constitutes a closed, test space；Temperature control device is equipped in insulating box.Circulating feeding liquid unit is
Multiple waters bath with thermostatic control 2 equipped with different tested medias outside insulating box, installation adjacent with insulating box 1, open piping
Do insulation isothermal holding.
Visual pipeline section 14 is equipped on circulation line between circulating feeding liquid unit, constant temperature temperature conditioning unit.
Test cell includes pressure tester 19, liquid feed valve, sealing pressing device 22, liquid discharge device 23 and exhaust
Valve, wherein pressure tester 19 is set to outside the insulating box of constant temperature temperature conditioning unit, the test pipeline and insulating box of pressure tester 19
The liquid line of interior process cycles pipeline, that is, detection unit connects, while should be connected to sealing pressing device 22 and liquid into test pipeline
Body tapping equipment 23；Liquid feed valve is installed between process pipeline in test pipeline and insulating box；Row is equipped in process pipeline eminence
Air valve.
Sealing pressing device 22 is used to carry out definite value pressurization to the medium in test pipeline, is surveyed by pressure tester 19
Pressure medium value.
Liquid discharge device 23 is for the pipeline pressure release and media discharge in pressure test sequence.
Pressure test unit is equipped in the utility model, the unit is using pressure tester 19 by two kinds of different densities
Liquid (transformer oil/diesel oil, pure water) carries out/pressure release testing inspection that pressurizes to tested densitometer 9, at the same acquire fluid temperature,
The data such as pressure, tested densitometer vibration period, system includes connecting pipe, liquid feed valve, (pressure resistance is not low for sealing pressing device 22
In 6.0MPa), liquid discharge device 23 and exhaust valve.In design, the stability and reliability of system pressurization constant pressure are considered, it must
The supercharging equipments such as nitrogen cylinder are configured when wanting.Pressure tester 19 selects BEAMEX brand MC6, and technical performance index is range model
Enclose (0~6) MPa, pressure measurement accuracy ± 0.025%FS (from 20kPa~6MPa).
The utility model test cell selects the liquid of 2 kinds of different densities as tested media, is full of in test
Tested on-line densimeter, guarantee uniformly choose at least five pressure spots wherein without entrained gas in operating pressure scope of experiment,
Using static pressurizing device to liquid pressing, when signal stabilization to be output, records related data (such as density value or current signal),
Fluid temperature value is recorded simultaneously, fluid density value under the same terms.Temperature is steady during entire density versus temperature-pressure testing
Fixed, stability is less than ± 0.1 DEG C.
The utility model also has densitometer check standard device, including liquid temperature density measure bucket 11, and first-class glass ball float is close
Degree meter 12 and thermosensitive thermometer 13, wherein liquid temperature density measure bucket 11 is installed in constant temperature temperature conditioning unit, is surveyed in liquid temperature density
It is examined and determine in measuring tank 11 and constant temperature temperature conditioning unit and shut-off valve 3 is installed between the liquid line of unit；In liquid temperature density measure bucket 11
Equipped with first-class glass ball float densitometer 12 and thermosensitive thermometer 13.Also have pipeline purging unit, including air compressor 18 ...
And accumulator tank 21, wherein air compressor 18 is connected to by valve with the liquid line for examining and determine unit, and accumulator tank 21 is installed on inspection
The liquid line end of order member.
The utility model is a kind of to combine the device of desk-top densimeter (to hold using standard density meter method and glass density meter method
Glass density meter method and normal fluid densimeter method in row JJG 370), match respectively at the both ends of tested densitometer 9 (totally 3)
Have and the concatenated inlet dispenser 8 of tested densitometer and outlet distributor 10；It is passed in and out in tested densitometer 9 with standard density meter 7
Closing on pipeline for mouth is respectively mounted temperature transmitter 6 (totally 4), compares what 2 standard scale densitometers 7 detected in verification process
Density and temperature change monitor the operating status of insulating box 1 in verification process constant temperature system；Pressure transmitter is installed on pipeline
4 (1), turbine flowmeter 5 (1), for monitoring the flow of tested media, pressure in pipeline in real time；Process cycles pipeline and
Instrument is installed in the insulating box 1 of controllable temperature, and calibrating space requirement is met inside insulating box 1, has liquid temperature density in insulating box 1
Bucket 11 is measured, measures fluid density for first-class glass tube float densitometer 12, installation high-precision thermosensitive thermometer 13 is real in bucket
When measure the temperature of a liquid, shut-off valve 3 is installed between liquid temperature density measure bucket 11 and process cycles pipeline, only need adopt
It is just opened when measuring density with first-class glass ball float density, so that being full of the tested media of appropriate amount in measurement bucket.In insulating box 1
Outside, using 2 loop control tested media circulating temperature of water bath with thermostatic control and circulation rate, water bath with thermostatic control 2 is interior equipped with stainless steel
Circulating pump.The installation adjacent with water bath with thermostatic control 2 of insulating box 1, open piping do insulation isothermal holding, guarantee water-bath and flow through densitometer
Liquid temperature temperature it is as consistent as possible, and meet the associated specifications of JJG 370.
To guarantee that room temperature, humidity can all reach calibrating environmental requirement when examining and determine densitometer, the work in the utility model
Skill circulation line (i.e. the liquid line of detection unit) and instrument are installed in the insulating box 1 of controllable temperature.Insulating box 1 uses group
Pin-connected panel library plate (steel battenboard) structure is closed, directly constitutes a closed test space, while insulating box 1 is filled equipped with temperature control
It sets.Insulating box and temperature control device technical performance index: temperature-control range (10~80) DEG C, 20 ± 0.2 DEG C of temperature-controlled precision, temperature fluctuation
Spend≤± 0.2 DEG C (zero load).
The utility model is equipped with multiple waters bath with thermostatic control 2 equipped with different tested medias outside insulating box 1, for recycling control
Tested media circulating temperature and circulation rate processed, for cold controlled, the field source of temperature homogeneous constant that provides a heat when device work,
Steady temperature test or test are carried out to test specimen, also can be used as the heat source for directly heating or freezing and assist heating or freeze
Or cold source.2 technical performance index of water bath with thermostatic control: temperature-control range (10~80) DEG C, temperature-controlled precision ± 0.05 DEG C, temperature control method PID
Control, circulation diving pump discharge (0~5.3) m3/ h, work nest volume 30L.
It is a set of that densitometer check standard device is equipped in the utility model, including First class standard densitometer group 12, precise digital display
Compensation by thermistor 13 and liquid temperature density measure bucket 11.It just opens, makes when needing using first-class glass density measurement density
Must measure in bucket be full of appropriate amount tested media, meet First class standard densimeter measurement fluid density temperature control requirement and
Density, temperature direct-reading requirement.
Pressure testing system is equipped in the utility model, the system is using pressure tester 19 by two kinds of different densities
Liquid (transformer oil/diesel oil, pure water) carries out/pressure release testing inspection that pressurizes to tested densitometer 9, at the same acquire fluid temperature,
Data, the systems such as pressure, tested densitometer vibration period include connecting pipe, connecting flange, liquid feed valve, sealing pressing device
(pressure resistance is not less than 6.0MPa), liquid discharge device and exhaust valve.Design when, consider system pressurization constant pressure stability and can
By property, the supercharging equipments such as nitrogen cylinder are configured when necessary.Pressure tester 19 selects BEAMEX brand MC6, technical performance index
For range ability (0~6) MPa, pressure measurement accuracy ± 0.025%FS (from 20kPa~6MPa).
The utility model is in view of that can replace different tested medias in device experiment to meet detection needs, to exclude as early as possible
Remaining tested media in pipeline, by rationally designing the tilt angle of process pipeline, utilizes air pressure if a set of scavenging system
Contracting machine 18 reaches emptying and empties the ability of the tested media in pipeline to gas boosting is carried out in pipeline.The test of purging is situated between
Matter drains into accumulator tank 21 and is uniformly processed.The content of deletion is not essential, can also be added again.
The computer control system 17 of the utility model is with host computer (industrial personal computer), slave computer (PLC operation cabinet) and group
State inspection software is that core completes system control tasks, it can be achieved that temperature, pressure transmitter in technical process, standard density meter,
The automatic collection and calculation processing of the measurement data such as tested densitometer；Realize verifying process flow automatically control, meet temperature, pressure,
The adjusting requirement of the parameters such as flow velocity；Process flow state, measurement data and verification result real-time display on the screen；It can be achieved
Upper and lower limit is preset and overload alarm；System software is modular construction, guarantees the reliability of data acquisition process in device operation
And accuracy, guarantee the ease for operation that later period software is adjusted and improved, and set progressive operation permission for operator, guarantees software
Stringent control can be obtained with data modification, satisfaction is automatically and manually examined and determine function to on-line vibration tube densimeter；It can compile
Printing data report form processed exports probation redport.And provide calibrating data and probation redport edit-modify, filing printing function, inspection
Determining result form can be by user's custom-modification；System establishes with long preservation period, independent dedicated calibrating database management function,
Can and historical query and entry be facilitated to retrieve according to condition；Under the premise of meeting system safety, control system allows other journeys
Calibration certificate and calibrating data can be uploaded to the metering that user specifies by network by the calibrating data in sequence user's reading system
In management system.
The workflow of the utility model each unit are as follows:
1, the calibrating installation includes five parts.
A, circulating feeding liquid unit b, constant temperature temperature conditioning unit c, calibrating unit d, pressure test unit e, pipeline purging air supply unit 2,
Process description:
The working principle of the utility model are as follows: within the scope of (10~80) DEG C, select at least three kinds of different densities liquid, lead to
It crosses insulating box 1 and water bath with thermostatic control 2 and carries out thermostatic control respectively in minimum and maximum temperature point and medium temperature point, work as fluid temperature
When stability reaches ± 0.05 DEG C, tested densitometer 9 is calibrated, (its is close using standard density liquid for simulation actual condition
Degree is obtained by desk-top vibrating tube densimeter 15, the measurement of standard vibration tube densimeter 7) it is detected densitometer 9, by computer control system
17 synchronization gain densitometers export vibration period signal, temperature, pressure, obtain one group of equation about different densities value, pass through
Every correction factor of tested densitometer 9 is calculated in least square method.
The utility model measurement range is (750~1000) kg/m3, the expected uncertainty of measurement of device is no more than U=
0.08kg/m3(using water as medium).Measurement standard is using first-class glass ball float densitometer 12, standard vibration tube densimeter 7, number
The mode of the desk-top 15 combined high precision frequency meter 16 of densimeter of word vibrates densitometer and standard density meter for high accuracy grade
It is examined and determine using first-class glass ball float densimeter method, and carries out the calibrating examination using the desk-top densimeter of high accuracy as standard
It tests, lower class of accuracy densitometer is examined and determine using standard density meter method.Magnitude biography is carried out using standard density meter
It passs, test condition is close with actual use dynamic operation condition, is able to achieve computer and is uniformly controlled, and manages concentratedly, makes verification process certainly
Dynamicization, sequencing guarantee the gentle working efficiency of temperature control water.
Claims (8)
1. a kind of dynamic density meter calibrating installation, it is characterised in that: including examining and determine unit, circulating feeding liquid unit, constant temperature temperature control list
Member and test cell, wherein calibrating unit is mounted as a whole in constant temperature temperature conditioning unit, circulating feeding liquid unit passes through circulation line
Be connected to the liquid line of calibrating unit, test cell is installed in the liquid line for examining and determine unit, and by the liquid temperature of acquisition
Degree, pressure, tested densitometer vibration period data are uploaded to monitoring unit.
2. dynamic density meter calibrating installation according to claim 1, it is characterised in that: calibrating unit includes entrance distribution
Device, outlet distributor and standard density meter, inlet dispenser and outlet distributor are respectively arranged in the both ends of tested densitometer,
Standard density is calculated as two, be respectively arranged in inlet dispenser entrance then with the outlet side of outlet distributor.
3. dynamic density meter calibrating installation according to claim 1, it is characterised in that: constant temperature temperature conditioning unit is a controllable temperature
Insulating box, the insulating box using assemble type structure constitute a closed test space；Temperature is equipped in insulating box
Control device.
4. dynamic density meter calibrating installation according to claim 1, it is characterised in that: constant temperature temperature conditioning unit is set on constant temperature
Multiple waters bath with thermostatic control equipped with different tested medias outside case, installation adjacent with insulating box, open piping do adiabatic heat-insulation
Processing.
5. dynamic density meter calibrating installation according to claim 1, it is characterised in that: also have densitometer check standard
Device, including liquid temperature density measure bucket, first-class glass ball float densitometer and thermosensitive thermometer, wherein liquid temperature density measure bucket is installed
In constant temperature temperature conditioning unit, it is equipped between the liquid line for examining and determine unit in liquid temperature density measure bucket and constant temperature temperature conditioning unit
Shut-off valve；First-class glass ball float densitometer and thermosensitive thermometer are equipped in liquid temperature density measure bucket.
6. dynamic density meter calibrating installation according to claim 1, it is characterised in that: test cell include pressure test,
Liquid feed valve, sealing pressing device, liquid discharge device and exhaust valve, wherein pressure tester is set to the perseverance of constant temperature temperature conditioning unit
Outside incubator, the test pipeline of pressure tester is connect with process cycles pipeline, that is, detection unit liquid line in insulating box, together
When the test pipeline be connected to sealing pressing device and liquid discharge device；It is installed between process pipeline in test pipeline and insulating box
There is liquid feed valve；Exhaust valve is equipped in process pipeline eminence.
7. dynamic density meter calibrating installation according to claim 1, it is characterised in that: liquid line integrally has an inclination
Angle, liquid line are equipped with pipeline purging unit, and pipeline purging unit includes air compressor and accumulator tank, and wherein air compressor is logical
Cross valve with examine and determine unit liquid line it is high-end be connected to, accumulator tank be installed on calibrating unit liquid line lower position on.
8. dynamic density meter calibrating installation according to claim 1, it is characterised in that: circulating feeding liquid unit, constant temperature temperature control
Circulation line between unit is equipped with visual pipeline section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821105410.2U CN208420604U (en) | 2018-07-12 | 2018-07-12 | Dynamic density meter calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821105410.2U CN208420604U (en) | 2018-07-12 | 2018-07-12 | Dynamic density meter calibrating installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208420604U true CN208420604U (en) | 2019-01-22 |
Family
ID=65126579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821105410.2U Active CN208420604U (en) | 2018-07-12 | 2018-07-12 | Dynamic density meter calibrating installation |
Country Status (1)
| Country | Link |
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| CN (1) | CN208420604U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801848A (en) * | 2018-07-12 | 2018-11-13 | 丹东意邦计量仪器仪表有限公司 | A kind of intelligent constant-temperature calibrating liquid densimeter experimental rig |
-
2018
- 2018-07-12 CN CN201821105410.2U patent/CN208420604U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108801848A (en) * | 2018-07-12 | 2018-11-13 | 丹东意邦计量仪器仪表有限公司 | A kind of intelligent constant-temperature calibrating liquid densimeter experimental rig |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jia Wentao Inventor after: Gong Benli Inventor before: Zhu Qing Inventor before: Jia Wentao Inventor before: Gong Benli |