CN208254994U - A kind of metering device of on-line checking liquid medium density - Google Patents
A kind of metering device of on-line checking liquid medium density Download PDFInfo
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- CN208254994U CN208254994U CN201820532620.3U CN201820532620U CN208254994U CN 208254994 U CN208254994 U CN 208254994U CN 201820532620 U CN201820532620 U CN 201820532620U CN 208254994 U CN208254994 U CN 208254994U
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Abstract
A kind of metering device of on-line checking liquid medium density, including sequentially connected process pipe (1), pressure reducing valve (2), overflow cofferdam (3), recycling can (5) and recycling liquid pump (7), overflow cofferdam (3) is connected on micro-pressure transmitter (4), and the lower side of recycling can (5) is equipped with liquidometer (6).The present apparatus can realize the continuous online detection of fluid to be measured Media density in the region for being equipped with DCS either PLC system in line with from the angle of the low investment of practical application.It by putting into operation for this set on-line measuring device, can greatly reduce the labor intensity of manual sampling detection, shorten detection time, improve production efficiency.
Description
Technical field
The utility model relates to detect the metering device of fluid density, especially a kind of on-line checking liquid medium density
Metering device.
Background technique
The physical definition of density is the quality of unit volume.According to definition it is known that density is the object for reflecting substance characteristics
Reason amount, the material that can identify the substance of measured object by measuring obtained density, can further calculate measured object
The component content or concentration of contained substance.Detection density must be it is to be understood that two physical quantitys: the quality and measured object of measured matter
The volume of matter, is obtained by calculating.Common measurement method has: (1) laboratory method；(2) specific gravity cup method；(3) Archimedes
Law method etc..Very cumbersome in the method for above-mentioned various measurement density, measurement period is long, and maximum defect is can not
Realize continuous online automatic detection, in industrialization large-scale continuous production can not promotion and application it is universal.In order to realize
Material density continuously automatically and accurately measures, it now is possible to the percentage composition of substance is detected by ratio instrument, then again
Density is calculated according to the functional relation of the percentage composition of substance and density.Ratio instrument is either ultraviolet from an economic point of view
Method or the price of infrared method are all very high, and the service life of light source is generally all short, belongs to consumables, in subsequent use
Expense can also be generated.From the technical point of view, infrared method also needs to be diluted with water during measuring certain media, measurement
Systematic error is also easy to produce in precision.The mode that measurement density uses at present is essentially all by manually sampling and then bringing back at the scene
Laboratory is detected with densimeter, from go spot sampling to testing result come out to take a substantial amount of time, such detection side
Formula not only wastes a large amount of artificial, inefficiency, and it is asynchronous with produced on-site to measure that there is also testing results, as a result
The phenomenon that lag.
Summary of the invention
The utility model solves the above-mentioned drawback of measurement fluid density at present, using a kind of detection method of simplicity come real
The on-line continuous of existing liquid medium accurately measures.
The technical solution adopted in the utility model: a kind of metering device of on-line checking liquid medium density, including successively
The process pipe (1) of connection, pressure reducing valve (2), overflow cofferdam (3), recycling can (5) and recycling liquid pump (7), overflow cofferdam (3) even
It connects on micro-pressure transmitter (4), the lower side of recycling can (5) is equipped with liquidometer (6).
The metering device of the on-line checking liquid medium density, overflow cofferdam (3) are enclosed by overflow port (8), overflow
Weir plate (9) and overflow cofferdam flange (10) composition
The metering device of the on-line checking liquid medium density, overflow port are provided with scale, to correct in order to
Reduce influence of the tension of measured medium liquid surface to measurement.
The metering device of the on-line checking liquid medium density, overflow port edge are by outside inwardly at≤45 °
Acute angle, to reduce the surface tension of measured medium.
The metering device of the on-line checking liquid medium density, overflow cofferdam flange (10) are connected to minute-pressure pick-up
On the bellows flange of device (4), the sealing of overflow cofferdam flange (10) and micro-pressure transmitter (4) flanged joint uses PVC liquid glue,
To reduce the systematic error that the value of overflow height variation generates measurement.
The metering device of the on-line checking liquid medium density, micro-pressure transmitter (4) select bellows-type, flange rule
Lattice select the flange of 2 ", 3 ", DN50 or DN80.It is preferred that 2 " flange film box formula come the case where reducing measurement delay.
The metering device of the on-line checking liquid medium density, micro-pressure transmitter (4) is in instrument installation process
Holding is horizontally mounted, and to ensure that bellows is pressurized uniformly, the environment temperature of installation should be fixed.
The metering device of the on-line checking liquid medium density, process pipe (1) and micro-pressure transmitter (4) are surveyed and are pressed
The distance of diaphragm is less than 15cm.Fluid to be measured medium minimizes this section of distance when flowing into overflow cofferdam by pressure reducing valve, shortens
The time of measurement delay surveys the impact of pressuring film plate, pipeline and pick-up in order to reduce liquid by potential energy at kinetic energy to transmitter
The distance that device surveys pressuring film plate is less than 15cm.
The metering device of the on-line checking liquid medium density, fluid to be measured medium stream from process pipe (1)
Drop point when out surveys pressuring film plate centre distance >=3cm apart from micro-pressure transmitter (4), surveys pressuring film plate to avoid micro-pressure transmitter.
The metering device of the on-line checking liquid medium density, it is characterised in that: device using DCS control system or
PLC control system is, it can be achieved that teledata continuous on-line detection.
Present apparatus design principle: pressure P caused by the fluid to be measured medium flowed out out of process pipelines in overflow cofferdam
Value can be measured by micro-pressure transmitter, operation of analog quantity can be carried out after DCS acquisition process by pick-up, overflow port has
Scale reduces influence of the tension to measurement of measured medium liquid surface to correct, fluid to be measured medium in overflow weir
Height h value be exactly be exactly that the height h1 of cofferdam plate is added the value of the height h2, h2 that are generated due to surface tension of liquid and can pass through
The scale measurement of overflow port obtains.ρ=p/gh. can be derived from pressure formula p=ρ gh, by h=hi+h2, then density p=p/ (h1
+ h2) * g, p value by measure through DCS acquisition process be it is known, the value of gravity acceleration g is constant, and the value of h1 is overflow
The height of cofferdam plate knows that the value of h2 can be obtained by overflow cofferdam mouthful scale measurement when production.Calculation part
It point founding mathematical models can realize in the operation of analog quantity of DCS or PLC.When flowing into the stability of flow in overflow cofferdam
The height h2 that tension when measured medium flows out overflow cofferdam generates be definite value or a very little level off to 0 numerical value.
The utility model has the beneficial effects that the present apparatus is being equipped with DCS in line with from the angle of the low investment of practical application
The region of either PLC system can realize the continuous online detection of fluid to be measured Media density.It is examined online by this set
Putting into operation for device is surveyed, the labor intensity of manual sampling detection can be greatly reduced, shortens detection time, improves production efficiency.
Detailed description of the invention
Fig. 1 is the process flow chart of the utility model.
Fig. 2 is the main view in overflow cofferdam.
Fig. 3 is the left view in overflow cofferdam.
Fig. 4 is the top view in overflow cofferdam.
In Fig. 1-4,1 it is process pipe, 2 is pressure reducing valve, 3 is overflow cofferdam, 4 is micro-pressure transmitter, 5 is recycling can, 6 is
Liquidometer, 7 be recycling liquid pump, 8 be overflow port, 9 be overflow cofferdam plate, 10 be overflow cofferdam flange.
Specific embodiment
Referring to attached drawing 1-4, a kind of metering device of on-line checking liquid medium density, including sequentially connected process pipe
(1), pressure reducing valve (2), overflow cofferdam (3), recycling can (5) and recycling liquid pump (7), overflow cofferdam (3) are connected to micro-pressure transmitter
(4) on, the lower side of recycling can (5) is equipped with liquidometer (6).From the liquid medium flowed out in process pipe (1) by subtracting
The overflow cofferdam (3) being connected on micro-pressure transmitter (4) bellows flange, tested Jie overflowed are flowed into after pressure valve (2) decompression
Mass flow enters in recycling can (5), and the lower side of recycling can (5) is equipped with liquidometer (6), and operator opens back according to liquid level
It receives liquid pump (7) and recovered liquid is returned process pipe (1).
Another embodiment the difference is that, overflow cofferdam (3) are enclosed by overflow port (8), overflow cofferdam plate (9) and overflow
Weir flange (10) composition
Another embodiment the difference is that, overflow port is provided with scale.
Another embodiment the difference is that, overflow port edge is by the inside acute angle at 45 ° in outside.
Another embodiment the difference is that, overflow port edge be by outside inwardly at 30 ° of acute angle.
Another embodiment the difference is that, overflow port edge be by outside inwardly at 15 ° of acute angle.
Another embodiment the difference is that, overflow cofferdam flange (10) is connected to the bellows method of micro-pressure transmitter (4)
The sealing of Lan Shang, overflow cofferdam flange (10) and micro-pressure transmitter (4) flanged joint use PVC liquid glue.
Another embodiment the difference is that, micro-pressure transmitter (4) select bellows-type, flange specification select 2 " method
It is blue.
Another embodiment the difference is that, micro-pressure transmitter (4) select bellows-type, flange specification select 3 " method
It is blue.
Another embodiment the difference is that, micro-pressure transmitter (4) select bellows-type, flange specification select DN50 method
It is blue.
Another embodiment the difference is that, micro-pressure transmitter (4) select bellows-type, flange specification select DN80 method
It is blue.
Another embodiment the difference is that, micro-pressure transmitter (4) keeps being horizontally mounted in instrument installation process.
Another embodiment the difference is that, process pipe (1) and micro-pressure transmitter (4), which are surveyed at a distance from pressuring film plate, is
14cm。
Another embodiment the difference is that, process pipe (1) and micro-pressure transmitter (4), which are surveyed at a distance from pressuring film plate, is
12cm。
Another embodiment the difference is that, process pipe (1) and micro-pressure transmitter (4), which are surveyed at a distance from pressuring film plate, is
10cm。
Another embodiment the difference is that, drop point distance of the fluid to be measured medium from the process pipe (1) when outflow
It is 3cm that micro-pressure transmitter (4), which surveys pressuring film plate centre distance,.
Another embodiment the difference is that, drop point distance of the fluid to be measured medium from the process pipe (1) when outflow
It is 4cm that micro-pressure transmitter (4), which surveys pressuring film plate centre distance,.
Another embodiment the difference is that, drop point distance of the fluid to be measured medium from the process pipe (1) when outflow
It is 5cm that micro-pressure transmitter (4), which surveys pressuring film plate centre distance,.
Another embodiment the difference is that, device use DCS control system.
Another embodiment the difference is that, device use PLC control system.
Claims (10)
1. a kind of metering device of on-line checking liquid medium density, it is characterised in that: including sequentially connected process pipe
(1), pressure reducing valve (2), overflow cofferdam (3), recycling can (5) and recycling liquid pump (7), overflow cofferdam (3) are connected to micro-pressure transmitter
(4) on, the lower side of recycling can (5) is equipped with liquidometer (6).
2. the metering device of on-line checking liquid medium density according to claim 1, it is characterised in that: overflow cofferdam
(3) it is made of overflow port (8), overflow cofferdam plate (9) and overflow cofferdam flange (10).
3. the metering device of on-line checking liquid medium density according to claim 2, it is characterised in that: overflow port setting
There is scale.
4. the metering device of on-line checking liquid medium density according to claim 3, it is characterised in that: overflow port edge
For by outside inwardly at≤45 ° of acute angle.
5. the metering device of on-line checking liquid medium density according to claim 1, it is characterised in that: overflow cofferdam method
Blue (10) are connected on the bellows flange of micro-pressure transmitter (4), overflow cofferdam flange (10) and micro-pressure transmitter (4) flanged joint
Sealing use PVC liquid glue.
6. the metering device of on-line checking liquid medium density according to claim 1, it is characterised in that: micro-pressure transmitter
(4) bellows-type is selected, flange specification selects the flange of 2 ", 3 ", DN50 or DN80.
7. the metering device of on-line checking liquid medium density according to claim 1, it is characterised in that: micro-pressure transmitter
(4) it keeps being horizontally mounted in instrument installation process.
8. the metering device of on-line checking liquid medium density according to claim 1, it is characterised in that: process pipe
(1) it is surveyed with micro-pressure transmitter (4) and is less than 15cm at a distance from pressuring film plate.
9. the metering device of on-line checking liquid medium density according to claim 1, it is characterised in that: fluid to be measured is situated between
Drop point of the matter from process pipe (1) when outflow surveys pressuring film plate centre distance >=3cm apart from micro-pressure transmitter (4).
10. the metering device of on-line checking liquid medium density described in -9 any claims according to claim 1, feature
Be: device is using DCS control system or PLC control system, it can be achieved that teledata continuous on-line detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820532620.3U CN208254994U (en) | 2018-04-16 | 2018-04-16 | A kind of metering device of on-line checking liquid medium density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820532620.3U CN208254994U (en) | 2018-04-16 | 2018-04-16 | A kind of metering device of on-line checking liquid medium density |
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| Publication Number | Publication Date |
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| CN208254994U true CN208254994U (en) | 2018-12-18 |
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ID=64636396
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| CN201820532620.3U Active CN208254994U (en) | 2018-04-16 | 2018-04-16 | A kind of metering device of on-line checking liquid medium density |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534437A (en) * | 2019-01-07 | 2019-03-29 | 北京石油化工学院 | A kind of overflow-type microwave radiation drinking water disinfection system |
-
2018
- 2018-04-16 CN CN201820532620.3U patent/CN208254994U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109534437A (en) * | 2019-01-07 | 2019-03-29 | 北京石油化工学院 | A kind of overflow-type microwave radiation drinking water disinfection system |
| CN109534437B (en) * | 2019-01-07 | 2024-01-19 | 北京石油化工学院 | Overflow type microwave radiation drinking water sterilization system |
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