CN104764500B - Laser micrometeor gauge - Google Patents
Laser micrometeor gauge Download PDFInfo
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- CN104764500B CN104764500B CN201510164633.0A CN201510164633A CN104764500B CN 104764500 B CN104764500 B CN 104764500B CN 201510164633 A CN201510164633 A CN 201510164633A CN 104764500 B CN104764500 B CN 104764500B
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- optical fiber
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Abstract
The present invention is a kind of laser micrometeor gauge, including pressure system, measuring system and data collecting system, pressure system include compression pump, and compression pump is parallel with the first intermediate receptacle and the second intermediate receptacle by the first control pressure line；First intermediate receptacle is connected by the first pipeline, detected fluid pipeline with the measurement pipe inside pressure chamber, and the second intermediate receptacle passes through the second pipeline and pressure chamber bottom through connection；Measuring system includes foregoing measurement pipe, its one end closes one end open, blind end is equipped with connecting hole and is tightly connected by the connecting hole and detected fluid pipeline outlet, openend side is equipped with optical fiber collimator, optical fiber collimator opposite side is connected with the first optical fiber and the second optical fiber, and the other end of the first optical fiber and the second optical fiber is connected to laser range sensor；Compression pump and laser range sensor are all connected to data collecting system.The gauge can solve the problems, such as that micrometeor fluid measurement precision is low under condition of high voltage, and realize Automatic survey.
Description
Technical field
The present invention relates to the e measurement technology of fluid micro-flux, more particularly to a kind of laser micrometeor gauge.
Background technology
In relevant simulated experiment is exploited with fine and close oil-gas reservoir, its experimental pressure is very high, and generally tens even nearly hundred
Megapascal；Further, since hole is very tiny, the flow of Experimental Flowing Object is ultralow, generally receives liter/min (nL/min) level.To this
A little to test, the metering of micrometeor, is fine and close oil-gas reservoir exploitation in especially unstable (such as pulse, vibration) seepage flow and oil displacement experiment
Test the technological difficulties urgently captured.
In such experiment, general at present flowmeter such as electromagnetic flowmeter, turbine flowmeter, mass flowmenter etc. are all
It can not be applied because range is excessive, measuring accuracy is low.For fluid micro-flow measurement, common high pressure flows down measurement in laboratory
The method of amount has：Measure syringe pump method, capillary pressure measuring method and visual microflow method.Wherein, syringe pump method is measured due to liquid under high pressure
The influence of the wastage of the influence of compressibility and pump under high pressure in itself, causes measurement error larger；Capillary pressure measuring method pair
Pressure Sensor Precision requires height, and existing Pressure Sensor Precision can not meet the metering of high pressure micro-flow；Visualize miniflow
Amount method provides the tiny flow quantity metering method of pressure≤30MPa a kind of, and this method is suitable for mul/min (μ L/min) level stream
Measure examination, it is impossible to which liter/min (nL/min) level flow is received in accurate metering, and can not meet ultra-low quantity of flow under the conditions of High-Voltage Experimentation
The continuous metering of (especially unsteady flow).
Thus, the present inventor relies on experience and the practice for being engaged in relevant industries for many years, proposes a kind of laser micrometeor metering
Instrument, the defects of to overcome the prior art.
The content of the invention
It is an object of the invention to provide a kind of laser micrometeor gauge, can solve under condition of high voltage in the prior art
The problem of micrometeor fluid measurement precision is low, the laser micrometeor gauge is easy to operate, can not disturb what micrometeor was tested
Under the conditions of, continuous measurement in real time is carried out to high pressure micro-flow fluid, realize micrometeor fluid measurement under condition of high voltage from
Dynamicization.
The object of the present invention is achieved like this, a kind of laser micrometeor gauge, including pressure system, measuring system and
Data collecting system, the pressure system include a compression pump, and described compression pump one end is connected with the first control pressure line, and described
The first intermediate receptacle and the second intermediate receptacle being vertically arranged are parallel with one control pressure line；First control pressure line with it is described
The first valve is provided between first intermediate receptacle bottom inlet, the first intermediate receptacle top exit is connected by the first pipeline
Horizontally disposed detected fluid pipeline is connected to, the second valve is provided with first pipeline；The detected fluid line inlet
The 3rd valve, the one pressure chamber side of detected fluid pipeline outlet hermetically passing are provided between first pipeline outlet
It is connected with the measuring system；The 4th valve is provided between first control pressure line and the second intermediate receptacle bottom inlet
Door, the second intermediate receptacle top exit pass through the second pipeline and pressure chamber bottom through connection, second pipeline
On be provided with the 5th valve；
The measuring system includes a measurement pipe being horizontally placed on inside the pressure chamber, measurement pipe one end closing
One end open, the blind end of the measurement pipe are provided with connecting hole, and the detected fluid pipeline outlet is sealed with the connecting hole
Connection；The openend side of the measurement pipe is provided with optical fiber collimator, and the optical fiber collimator opposite side is between the upper and lower every connection
There is the other end difference hermetically passing of horizontally disposed first optical fiber and the second optical fiber, first optical fiber and second optical fiber
The pressure chamber opposite side is connected to a laser range sensor；
The compression pump and the laser range sensor are all connected to the data collecting system.
In the better embodiment of the present invention, the pressure chamber internal pressure value is less than more than or equal to 0.1 megapascal etc.
In 160 megapascal.
In the better embodiment of the present invention, the measurement bore is more than or equal to 1.5 millimeters and is less than or equal to 3 millis
Rice.
In the better embodiment of the present invention, first intermediate receptacle is internally provided with first piston, and described the
Second piston is provided with two intermediate receptacles.
In the better embodiment of the present invention, first intermediate receptacle is internally located at dress above the first piston
There is mercury, second intermediate receptacle is internally located above the second piston filled with nitrogen.
In the better embodiment of the present invention, first control pressure line, the first valve, the first intermediate receptacle, the
One pipeline, the second valve, detected fluid pipeline, the 3rd valve, the 4th valve, the second intermediate receptacle, the second pipeline, the 5th valve
Be arranged at pressure chamber inside an insulating box, first optical fiber and second optical fiber through the insulating box side with it is described
Laser range sensor connects.
In the better embodiment of the present invention, the measuring accuracy of the insulating box is 0.1 DEG C.
In the better embodiment of the present invention, the length of the measurement pipe is less than the 3rd valve and described first
The distance between pipeline outlet.
From the above mentioned, laser micrometeor gauge of the invention, it is simple in structure, it is easy to operate, by pressure chamber, second
Between the cooperation of container and compression pump realize and balance each other with the pressure of tested high-pressure fluid that measuring environment pressure stability, meets stabilization
With the requirement of unsteady flow bulk measurement；Laser range sensor and optical fiber are made full use of, reduces measurement process error, improves
Measurement accuracy；Realized and automatically controlled by data collecting system, reduce manually-operated influence, realize real-time measurement,
Quantitative study is tested for Micro-flows, and accurate data is provided.
Brief description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein：
Fig. 1：For the laser micrometeor gauge structure diagram of the present invention.
Embodiment
In order to which the technical features, objects and effects of the present invention are more clearly understood, now control illustrates this hair
Bright embodiment.
As shown in Figure 1, laser micrometeor gauge 100 provided by the invention, including pressure system 1,2 sum number of measuring system
According to acquisition system 3, pressure system 1 includes a compression pump 11, and in the present embodiment, compression pump 11 pumps for high-precision pressure, can
To use 7615 high-pressure pumps of RUSKA (prior art), its scope of pressurizeing is 0.1 megapascal to 160 megapascal (including head and the tail numerical value),
Pressure precision is 0.02% range；11 one end of compression pump is connected with the first control pressure line 12, is parallel with the first control pressure line 12
The first intermediate receptacle 13 and the second intermediate receptacle 14 being vertically arranged, in the present embodiment, set inside the first intermediate receptacle 13
First piston 130 is equipped with, second piston 140 is provided with the second intermediate receptacle 14, the first intermediate receptacle 13 is internally located at first
The top of piston 130 is equipped with mercury, and the second intermediate receptacle 14 is internally located at the top of second piston 140 filled with nitrogen；First pressure control pipe
The first valve 131 is provided between 12 and first intermediate receptacle of line, 13 bottom inlet, 13 top exit of the first intermediate receptacle passes through
First pipeline 132 is connected to horizontally disposed detected fluid pipeline 4, and the second valve 133 is provided with the first pipeline 132；It is tested
4 entrance of fluid line connects with detected high pressure micro-flow experimental provision (being not included in structure of the present invention, not shown in figure)
Connect, be provided with the 3rd valve 41 between 4 entrance of detected fluid pipeline and the outlet of the first pipeline 132, detected fluid pipeline 4 exports close
Envelope is connected through 15 side of a pressure chamber with measuring system 2；First control pressure line 12 and 14 bottom inlet of the second intermediate receptacle it
Between be provided with the 4th valve 141,14 top exit of the second intermediate receptacle passes through the second pipeline 142 and connects with the perforation of 15 bottom of pressure chamber
Connect, the 5th valve 143 is provided with the second pipeline, in the present embodiment, in order to meet to measure condition of high voltage requirement, pressure chamber
15 internal pressure values are less than or equal to 160 megapascal more than or equal to 0.1 megapascal.
As shown in Figure 1, measuring system 2 includes a measurement pipe 21 being horizontally placed on inside pressure chamber 15, in this embodiment party
In formula, measurement pipe 21 is high pressure resistant pipe, can be glass tube, steel pipe or other materials pipe, in order to accurately measure the micro- of liquid
Small flow, the very little that the internal diameter of measurement pipe 21 is generally set, but in order to meet laser measurement requirement, the internal diameter of measurement pipe 21 is more than
Equal to 1.5 millimeters be less than or equal to 3 millimeters, meanwhile, in order to avoid measurement after detected fluid reflux into the first pipeline 132,
The length of measurement pipe 21 is less than the distance between the 3rd valve 41 and the outlet of the first pipeline 132, so as to ensure quilt in measurement process
Fluid measured is always positioned between the 3rd valve 41 and the outlet of the first pipeline 132, without because reflux enters the first pipeline 132
In；One end open is closed in 21 one end of measurement pipe, and the blind end of measurement pipe 21 is provided with connecting hole 211, and detected fluid pipeline 4 exports
It is tightly connected with connecting hole 211；The openend side of measurement pipe 21 is provided with optical fiber collimator 22,22 opposite side of optical fiber collimator
Between the upper and lower every the other end for being connected with horizontally disposed first optical fiber, 23 and second optical fiber 24, the first optical fiber 23 and the second optical fiber 24
15 opposite side of hermetically passing pressure chamber is connected to a laser range sensor 25 respectively.
Compression pump 11 and laser range sensor 25 are all connected to data collecting system 3, and data collecting system 3 is generally counted
Calculation machine, the equal real-time display of measured value of the pressure value and laser range sensor 25 of compression pump 11 are simultaneously recorded in data acquisition
In system 3,11 pressure value and the transmitting of laser range sensor 25 control pressure can be pumped by data collecting system 3 in real time
With reception, measurement process automation is realized.
Further, as shown in Figure 1, in order to ensure the stability of experimental temperature under condition of high voltage, the first control pressure line 12,
First valve 131, the first intermediate receptacle 13, the first pipeline 132, the second valve 133, detected fluid pipeline 4, the 3rd valve 41,
4th valve 141, the second intermediate receptacle 14, the second pipeline 142, the 5th valve 143 and pressure chamber 15 are arranged in an insulating box 5
Portion, the first optical fiber 23 and the second optical fiber 24 are connected through 5 side of insulating box with laser range sensor 25.In present embodiment
In, the precision of insulating box 5 is 0.1 DEG C, ensure that the precision of temperature measurement.
Before laser micrometeor gauge 100 provided by the invention measures, by 4 entrance of detected fluid pipeline and detected height
The connection of micrometeor experimental provision is pressed, according to the pressure value of requirement of experiment preset pressure pump 11 in data collecting system.During measurement,
The second valve 133, the 3rd valve 41 are first shut off, opens the first valve 131, the 4th valve 141 and the 5th valve 143, is opened
Compression pump 11, pressure chamber is kept by compression pump 11 to the first intermediate receptacle 13 and 14 bottom water injection of the second intermediate receptacle or water suction
Pressure reaches default pressure value in 15, after pressure stability, closes the 4th valve 141, opens the second valve 133, and a little (one
As be 10 kPas or so) adherence pressure pump 11 pressure, after the several seconds, close the second valve 133, recover compression pump 11 before pressure
Force value, at this time a small amount of mercury enter detected fluid pipeline 4 in.Then, laser range sensor 25 is opened, opens the 3rd valve
41, detected fluid enters in detected fluid pipeline 4 and promotes mercury to enter in measurement pipe 21, and detected fluid promotes mercury measuring
Moved in pipe 21, laser range sensor 25 launches laser and passes through the first optical fiber 23 and 22 directive quicksilver water of optical fiber collimator
Face, reflected light pass laser range sensor 25 back by 22 and second optical fiber 24 of optical fiber collimator, pass through the principle of laser ranging
The displacement of mercury in measurement pipe 21 and returned data acquisition system 3 are recorded, measures laser range sensor 25 and measurement pipe
The distance and time relationship at mercury interface in 21, you can calculate transient flow.After obtaining analysis result, the first valve is closed
131 and the 3rd valve 41, open the 4th valve 141, the pressure of a little (generally 10 kPas or so) adherence pressure pump 11, pressure
Mercury is released measurement pipe 21 for cabin 15 internal pressure lifting and reflux is returned in the first intermediate receptacle 13, repeats aforesaid operations afterwards
Measured next time.
From the above mentioned, laser micrometeor gauge of the invention, it is simple in structure, it is easy to operate, by pressure chamber, second
Between the cooperation of container and compression pump realize and balance each other with the pressure of tested high-pressure fluid that measuring environment pressure stability, meets stabilization
With the requirement of unsteady flow bulk measurement；Laser range sensor and optical fiber are made full use of, reduces measurement process error, improves
Measurement accuracy；Realized and automatically controlled by data collecting system, reduce manually-operated influence, realize real-time measurement,
Quantitative study is tested for Micro-flows, and accurate data is provided.
The foregoing is merely the schematical embodiment of the present invention, the scope of the present invention is not limited to.It is any
Those skilled in the art, made equivalent variations and modification on the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention should be belonged to.
Claims (8)
- A kind of 1. laser micrometeor gauge, it is characterised in that：The laser micrometeor gauge includes pressure system, measurement system System and data collecting system, the pressure system include a compression pump, and described compression pump one end is connected with the first control pressure line, institute The first intermediate receptacle and the second intermediate receptacle for being parallel with and being vertically arranged on the first control pressure line are stated, in first intermediate receptacle Portion is provided with first piston, and first intermediate receptacle is internally located above the first piston and mercury is housed；First control The first valve is provided between pressure pipeline and the first intermediate receptacle bottom inlet, the first intermediate receptacle top exit leads to Cross the first pipeline and be connected to horizontally disposed detected fluid pipeline, the second valve is provided with first pipeline；It is described tested The 3rd valve, the detected fluid pipeline outlet hermetically passing are provided between fluid line entrance and first pipeline outlet One pressure chamber side is connected with the measuring system；Between first control pressure line and the second intermediate receptacle bottom inlet Be provided with the 4th valve, the second intermediate receptacle top exit by the second pipeline and pressure chamber bottom through connection, The 5th valve is provided with second pipeline；The measuring system includes a measurement pipe being horizontally placed on inside the pressure chamber, and one end is closed in described measurement pipe one end Opening, the blind end of the measurement pipe are provided with connecting hole, and the detected fluid pipeline outlet is tightly connected with the connecting hole； The openend side of the measurement pipe is provided with optical fiber collimator, and the optical fiber collimator opposite side is between the upper and lower every being connected with level Pressure described in the other end difference hermetically passing of the first optical fiber and the second optical fiber set, first optical fiber and second optical fiber Power cabin opposite side is connected to a laser range sensor；The compression pump and the laser range sensor are all connected to the data collecting system.
- 2. laser micrometeor gauge as claimed in claim 1, it is characterised in that：The pressure chamber internal pressure value be more than etc. It is less than or equal to 160 megapascal in 0.1 megapascal.
- 3. laser micrometeor gauge as claimed in claim 1, it is characterised in that：The measurement bore is more than or equal to 1.5 Millimeter is less than or equal to 3 millimeters.
- 4. laser micrometeor gauge as claimed in claim 1, it is characterised in that：Is provided with second intermediate receptacle Two pistons.
- 5. laser micrometeor gauge as claimed in claim 4, it is characterised in that：Second intermediate receptacle is internally located at institute State above second piston filled with nitrogen.
- 6. laser micrometeor gauge as claimed in claim 1, it is characterised in that：First control pressure line, the first valve, First intermediate receptacle, the first pipeline, the second valve, detected fluid pipeline, the 3rd valve, the 4th valve, the second intermediate receptacle, Two pipelines, the 5th valve and pressure chamber are arranged inside an insulating box, and first optical fiber and second optical fiber are described in Insulating box side is connected with the laser range sensor.
- 7. laser micrometeor gauge as claimed in claim 6, it is characterised in that：The measuring accuracy of the insulating box is 0.1 ℃。
- 8. laser micrometeor gauge as claimed in claim 1, it is characterised in that：The length of the measurement pipe is less than described the The distance between three valves and first pipeline outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510164633.0A CN104764500B (en) | 2015-04-09 | 2015-04-09 | Laser micrometeor gauge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510164633.0A CN104764500B (en) | 2015-04-09 | 2015-04-09 | Laser micrometeor gauge |
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| CN104764500A CN104764500A (en) | 2015-07-08 |
| CN104764500B true CN104764500B (en) | 2018-04-17 |
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| CN105737908B (en) * | 2016-05-10 | 2019-02-15 | 南通市第一人民医院 | A kind of laser displacement oxygen flow sensor |
| CN112795477A (en) * | 2021-01-21 | 2021-05-14 | 李月月 | High-efficiency anaerobic bioreactor |
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| CN101055201A (en) * | 2007-05-29 | 2007-10-17 | 复旦大学 | Fluid micro-flux measuring method |
| CN101608939A (en) * | 2009-07-22 | 2009-12-23 | 中国石油天然气股份有限公司 | High-temperature high-pressure visual micro-flow measuring instrument and measuring method |
| CN101852714A (en) * | 2010-04-30 | 2010-10-06 | 中国石油大学(北京) | Measuring system and method of low-speed non-linear seepage parameters |
| CN204594514U (en) * | 2015-04-09 | 2015-08-26 | 中国石油大学(北京) | Laser micrometeor gauge |
-
2015
- 2015-04-09 CN CN201510164633.0A patent/CN104764500B/en active Active
Patent Citations (6)
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| CN1382985A (en) * | 2002-06-03 | 2002-12-04 | 复旦大学 | Thermal expanding microstream high-pressure gradient pump and its application method |
| CN1955707A (en) * | 2005-10-26 | 2007-05-02 | 中国科学院力学研究所 | Double-pipe relative measurement method and device for microflow of liquid |
| CN101055201A (en) * | 2007-05-29 | 2007-10-17 | 复旦大学 | Fluid micro-flux measuring method |
| CN101608939A (en) * | 2009-07-22 | 2009-12-23 | 中国石油天然气股份有限公司 | High-temperature high-pressure visual micro-flow measuring instrument and measuring method |
| CN101852714A (en) * | 2010-04-30 | 2010-10-06 | 中国石油大学(北京) | Measuring system and method of low-speed non-linear seepage parameters |
| CN204594514U (en) * | 2015-04-09 | 2015-08-26 | 中国石油大学(北京) | Laser micrometeor gauge |
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