CN207610739U - A kind of flux of moisture measuring device based on exemption grade radioactive source - Google Patents
A kind of flux of moisture measuring device based on exemption grade radioactive source Download PDFInfo
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- CN207610739U CN207610739U CN201721804844.7U CN201721804844U CN207610739U CN 207610739 U CN207610739 U CN 207610739U CN 201721804844 U CN201721804844 U CN 201721804844U CN 207610739 U CN207610739 U CN 207610739U
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Abstract
The utility model discloses a kind of based on the flux of moisture measuring device for exempting grade radioactive source, it is characterized in that, it include one section of cylindrical pipe (1) and position in the inner and the taper throttling element (2) that is coaxially arranged, the taper throttling element (2) includes the head conical section (22) and tail conical section (23) of total bottom surface setting, moisture inlet of the wherein described head conical section (22) in face of the cylindrical pipe (1), an annular space (3) is limited so that moisture passes through between the inner wall of the cylindrical pipe (1) and the maximum gauge of taper throttling element (2)；(21), which are provided with, at the maximum gauge of the taper throttling element (2) exempts grade radiation source block (4), is positioned such that the gamma ray that it is released can radially break through the annular space (3) arrival positioned at the external gamma-ray detector (5) of cylindrical pipe (1).The utility model can use and exempt grade radioactive source, this is revolutionary the breaking through of multiphase flow rate metering apparatus field.
Description
Technical field
The utility model belongs to flow metering devices field, and in particular to a kind of based on the flux of moisture for exempting grade radioactive source
Metering device.
Background technology
In oil and gas industry, oil gas well effluent includes the gas-liquid mixture fluid of liquid phase crude oil and gas phase natural gas simultaneously, in the industry
Referred to as multiphase flow.The wherein described gas phase includes such as oil gas field gas or any gas not solidifying at normal temperatures, specifically just like
Methane, ethane, propane, butane etc.；The liquid phase may include：Oil phase, such as crude oil itself and during oil extraction it is molten
Liquid additive and water phase of the solution in crude oil, for example, water flooding, using in the process inject oil/gas well in water and dissolving
Other liquid additives in water phase.In practice, oil phase and water phase may be separated, it is also possible to which oil phase is mixed with water
It is combined, or emulsify completely.How the gas from the gas-liquid mixture fluid produced in oil/gas well is real-time and accurately measured
Flow and liquid flow, and how further to measure oil phase, gas phase and the respective flow of water phase three-phase, be oil gas
Hide basic data necessary to management and Optimizing manufacture.When the gas phase mass content in multiphase flow is higher than 80%, commonly referred to as
Moisture.In hydrocarbon sub-marine field and shale gas exploitation, production is moisture.
Method that is state-of-the-art in the prior art while measuring the respective mass flow of gas and oil water three-phase in moisture is that gamma is penetrated
Line measurement Law, principle are the total mass flow rates using Venturi measuring moisture, are used in combination dual intensity gamma-ray detector in text
The respective phase fraction of gas and oil water three-phase is measured at venturi throat, is then multiplied by respective gas and oil water three-phase respectively with total mass flow rate
Phase fraction, obtain the respective mass flow of gas and oil water three-phase.
Gamma ray has to penetrate through venturi throat diameter, by measure transmitted through throat gamma rays intensity with
The ratio of its initial activity obtains phase fraction by conversion.Certain orifice size than constraint under, the diameter of throat
Can also it increase with the increase of bore, when throat diameter increases to certain size, transmitted through the gamma rays ratio very little of throat,
Under same gamma ray receiver accuracy of detection, measurement accuracy can be caused to decline.In order to ensure measurement accuracy, technically
It must be solved by enhancing the intensity of gamma-ray source.
According to《Bulletin about publication radioactive source scheme of classification》(State Environmental Protection Administration announce 2005 No. 62)
Relevant regulations, and with reference to the pertinent regulations of International Atomic Energy Agency, China dives to health and environment according to radioactive source
In the extent of injury, radioactive source is divided into following I from high to low, II, III, IV, V class, wherein the lower limit activity value in V classes source be should
The exemption activity of kind nucleic：
I class radioactive source is high danger source.In the case of not protecting, people can be caused by 1 hour by contacting this kind of source a few minutes
It is dead；
II class radioactive source is high-risk source.In the case of not protecting, contact this kind of source a few houres to several days can causing death；
III class radioactive source is danger source.In the case of not protecting, contacting this kind of source a few houres can be to artificial at permanent
Damage, contact several days to several weeks also can causing death；
IV class radioactive source is low danger source.Substantially will not to artificial at permanent damage, but to for a long time, close contact
The people of these radioactive sources may cause recoverable provisional damage；
V class radioactive source is extremely low danger source.It will not be to artificial at permanent damage.
If usually a radioactive source is less than or equal to the lower limit activity of V class radioactive sources, it is called and exempts grade radioactive source.
The gamma-ray source used on the gamma ray wet gas meter industrially used at present is Group III and higher
The non-exemption grade radioactive source of danger classes, for security consideration, the storage of strong radiation source is used and is transported by various countries' administration
The stringent management and control of authorities, this to the flux of moisture measuring device based on gamma ray industrialized production and commercially use cause
Huge obstacle.
Therefore, people be intended to all the time can using exempt grade radioactive source it is traditional by the strong of stringent management and control to replace
Radioactive source almost can be used freely because executive authorities of various countries are all most loose to the control for exempting grade radioactive source.But
It is that exemption grade radioactive source is because its activity is very low, for industrial heavy caliber moisture pipeline, exempts what grade radioactive source was released
Gamma ray is often just very faint after venturi throat and is difficult to accurately detect, and measurement accuracy is caused to decline.This makes
It is almost difficult to be industrially used.
The utility model aims to solve the problem that the above problem.
Utility model content
The utility model first aspect provides a kind of based on the flux of moisture measuring device for exempting grade radioactive source comprising
In the inner and the taper throttling element 2 that is coaxially arranged, the taper throttling element 2 includes altogether for one section of cylindrical pipe 1 and position
The head conical section 22 and tail conical section 23 of bottom surface setting, wherein moisture of the head conical section 22 in face of the cylindrical pipe 1
An annular space 3 is limited for wet between entrance, the inner wall of the cylindrical pipe 1 and the maximum gauge of taper throttling element 2
Gas passes through；21 are provided with exemption grade radiation source block 4 at the maximum gauge of the taper throttling element 2, are positioned such that it
The gamma ray of releasing can radially break through the annular space 3 and reach the gamma-ray detector being located at outside cylindrical pipe 1
5。
Preferably, the flux of moisture measuring device based on exemption grade radioactive source further includes differential pressure measuring installation 6,
There are two pressure taps for tool, wherein the first pressure tap 61 is located on the side wall of the cylindrical pipe 1 of 22 upstream of head conical section,
Second pressure tap 62 is located at the apex in the tail conical section 23.
Preferably, second pressure tap 62 is penetrated into via the pressure guiding pipe through the central axes of the taper throttling element 2
1 outside of the cylindrical pipe is simultaneously connected on differential pressure measuring installation 6.
Preferably, the exemption grade radioactive source is above-mentioned V classes radioactive source, is preferably selected from Ba133.Certainly, other are exempted grade and put
The source of penetrating can also use.
Preferably, the cone angle of the head conical section 22 is 30-45 °, the conical surface of the head conical section 22 and the tail circular cone
It is acute angle or right angle between the conical surface of section 23.
Preferably, the width of the annular space 3 is less than 50mm, for example, 25-50mm.
Preferably, the number for exempting grade radiation source block 4 is multiple.They are preferably arranged in a manner of circumferentially equally distributed.
The utility model second aspect also discloses a kind of based on the flux of moisture measuring device for exempting grade radioactive source, packet
The taper throttling element 2 for including one section of cylindrical pipe 1 and position in the inner and being coaxially arranged, the taper throttling element 2 include
The head conical section 22 and tail conical section 23 of bottom surface setting altogether, wherein the head conical section 22 is in face of the wet of the cylindrical pipe 1
Gas entrance, limited between the inner wall and the conical surface of head conical section 22 of the cylindrical pipe 1 a tapered annular space space 9 for
Moisture passes through；It is provided on the conical surface of the head conical section 22 and exempts grade radiation source block 4, be positioned such that its releasing
Gamma ray can radially break through the tapered annular space space 9 and reach the gamma ray spy being located at outside cylindrical pipe 1
Device 5 is surveyed, wherein the radial width in the tapered annular space space 9 at place is passed through to be less than 50mm for the gamma ray.
To be adaptable based on the flux of moisture measuring device for exempting grade radioactive source with the utility model, the applicant also opens
A set of unique algorithm is sent out, the algorithm is quasi- separately to be applied for a patent.
The beneficial effects of the utility model：
1, the utility model has abandoned the center throttle type conventional wet air-flow that Venturi tube is combined with gamma-ray detector
Gauge structure is changed to be combined with the periphery throttle type of gamma-ray detector with taper throttling element.Same with venturi throat
Etc. in the case of flow sections, moisture is flowed from annular space and is flowed compared to from venturi throat, what gamma ray to be transmitted through
Moisture distance wants much shorter, therefore can replace the strong radiation in conventional flow meters using the lower exemption grade radioactive source of activity
Source.Since executive authorities of various countries to the production of exemption grade radioactive source, transport and use without control, so greatly facilitating into
Manufacture, transport, displaying and the application of product wet gas meter.In addition, the flow measurement accuracy and precision of the utility model are not yet
Less than traditional wet gas meter.
2, the mode of this outside Zhou Jieliu of the utility model is conducive to adjust velocity in pipes field distribution, reduces gas-liquid and slides
Difference.
3, wake turbulence is small, and noise amplitude is low, is conducive to range extension ratio.
Description of the drawings
Fig. 1 is the structural schematic diagram based on the flux of moisture measuring device for exempting grade radioactive source of the utility model.
Fig. 2 be the utility model it is more broadly on shown based on the structure of flux of moisture measuring device for exempting grade radioactive source
It is intended to.
Wherein each reference numeral indicates following meanings：
1- cylindrical pipes；2- taper throttling elements；At 21- taper throttling element maximum gauges；22- conical sections；23- tails are justified
Bore section；3- annular spaces；4- exempts grade and radiates source block；5- gamma-ray detectors；6- differential pressure measuring installations；The first pressure taps of 61-；
The second pressure taps of 62-；7- pressure gauges；8- thermometers；The tapered annular space spaces 9-.
Specific implementation mode
Following embodiment is provided and is intended to illustrate the content of utility model, rather than to scope of protection of the utility model into
One step limits.
Embodiment 1
As shown in Figure 1, the utility model includes one section of cylinder based on the flux of moisture measuring device of grade radioactive source is exempted
Shape pipeline 1 and position in the inner and the taper throttling element 2 that is coaxially arranged, the taper throttling element 2 include altogether bottom surface be arranged
Head conical section 22 and tail conical section 23 and the two floor space it is identical, wherein the head conical section 22 is in face of the cylindrical pipe
1 moisture inlet limits one at the maximum gauge of the taper throttling element 2 between 21 and the inner wall of the cylindrical pipe 1
A annular space 3 passes through for moisture；21 are provided with exemption grade radioactive source Ba at the maximum gauge of the taper throttling element 2133Material
Expect that block 4, activity are less than 25 μ Ci, is positioned such that the gamma ray of its releasing can radially break through the annular space 3 and arrive
Up to the gamma-ray detector 5 outside cylindrical pipe 1.The outside of the cylindrical pipe 1 is equipped with differential pressure measuring installation
6, there are two pressure taps for tool, wherein the first pressure tap 61 is located at the side wall of the cylindrical pipe 1 of 22 upstream of head conical section
On, the second pressure tap 62 is located at the apex in the tail conical section 23, and the second pressure tap 62 is via through the cone
The pressure guiding pipe of the central axes of shape throttling element 2 is penetrated into 1 outside of the cylindrical pipe and is connected on differential pressure measuring installation 6.
First pressure tap upstream can also have thermometer 8, the first pressure tap to be also connected with pressure gauge 7 simultaneously.The bending of above-mentioned pressure guiding pipe
Place will be the internal diameter of cylindrical pipe apart from the first pressure tap at least distance of 2D, wherein D.In the present embodiment, the head
The cone angle of conical section 22 is 30 °, and head conical section 22 and the conical surface angle of tail conical section 23 are 90 °.
Measurement process work is as follows：Moisture is flowed into from the arrival end of the cylindrical pipe 1, and is being measured its temperature on the way
T and pressure P is spent, then the annular space is flowed through under the guiding of the taper throttling element, thus generates throttling action, because throttling is produced
Raw pressure differential deltap P is measured by above-mentioned differential pressure measuring installation.At annular space, gas phase quality phase fraction is measured by gamma-ray detector
αgas, oil quality phase fraction αoilWith water phase quality phase fraction αwater, wherein αgas+αoil+αwater=1, then use following steps
Calculate the respective mass flow of gas and oil water three-phase：
1. being calculated by the following formula the hybrid density of multiphase flow：
ρ=ρwater×αwater+ρoil×αoil+ρgas×αgas
2. calculating the total mass flow rate Q of multiphase flow by following flow rate calculation formulam：
In formula：Qm--- mass flows, kg/h；
K---- coefficients；
Δ P-differential pressure value, kPa；
The hybrid density of ρ --- multiphase flow, kg/m3。
Wherein,
In formula：
β-equivalent diameter ratio, usually 0.35-0.75；
The internal diameter of D--- cylindrical pipes 1, m；
D--- cone throttling element maximum diameters, m；
ε-the compressed coefficient, for liquid, ε=1；For gas,
Wherein k is constant entropy coefficient, general monoatomic gas k=1.67, diatomic gas k=1.40, polyatomic gas k=
The k values of 1.10-1.29, some common gases are as follows：Argon gas k=1.67, helium k=1.67, hydrogen k=1.40, nitrogen k
=1.40, oxygen O2k=1.39, carbon monoxide k=1.40, air k=1.40, water vapour k=1.33, carbon dioxide k=
1.29, sulfur dioxide k=1.25, methane=1.30, propane k=1.13；
Wherein τ is pressure ratio P2/P1, P2For taper throttling element downstream pressure, P1For taper throttling element upstream pressure；
Wherein efflux coefficient C can be obtained at scene by flow calibration method, and exemplary value range is 0.75~
0.85, or be calculated according to following empirical equation：
3. being calculated by the following formula the respective mass flow of oil gas water three phase：
Qgas=Qm×αgas
Qwater=Qm×αwater
Qoil=Qm×αoil
Each physical quantity in above-mentioned formula is all made of the International System of Units, is subject to and is adapted each other.
Embodiment 2
Difference lies in exempt the position of grade radioactive source in taper throttling element as shown in Fig. 2, it is with structure shown in Fig. 1 for structure
On the conical surface of 2 head conical section 22, it is located proximate to 21 at the maximum gauge of the taper throttling element 2, arrangement
Its gamma ray released is enable to radially break through the tapered annular space space 9) it reaches outside cylindrical pipe 1
Gamma-ray detector 5, wherein passing through the radial width in the tapered annular space space 9 at place to be less than for the gamma ray
50mm。
Specific mass flow calculation method is identical with embodiment 1.
Claims (8)
1. a kind of based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that it includes one section of cylindrical pipe
(1) and position in the inner and the taper throttling element (2) that is coaxially arranged, the taper throttling element (2) include altogether bottom surface be arranged
Head conical section (22) and tail conical section (23), wherein moisture of the head conical section (22) in face of the cylindrical pipe (1)
An annular space (3) is limited between entrance, the inner wall of the cylindrical pipe (1) and the maximum gauge of taper throttling element (2)
So that moisture passes through；(21), which are provided with, at the maximum gauge of the taper throttling element (2) exempts grade radiation source block (4), cloth
The mode of setting enables its gamma ray released to radially break through the annular space (3) and reach and is located at cylindrical pipe (1) outside
Gamma-ray detector (5).
2. according to claim 1 based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that it is also wrapped
Differential pressure measuring installation (6) is included, there are two pressure taps for tool, wherein the first pressure tap (61) is located at head conical section (22) upstream
Cylindrical pipe (1) side wall on, the second pressure tap (62) be located at the tail conical section (23) apex.
3. according to claim 2 based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that described the
Two pressure taps (62) are penetrated into the cylindrical pipe (1) via the pressure guiding pipe through the central axes of the taper throttling element (2)
Outside is simultaneously connected on differential pressure measuring installation (6).
4. according to claim 1 based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that described to slit
It is Ba to exempt from grade radioactive source133。
5. according to claim 1 based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that the head
The cone angle of conical section (22) be 30-45 °, between the conical surface and the conical surface of the tail conical section (23) of the head conical section (22) at
Acute angle.
6. according to claim 1 based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that exempt grade
The number for radiating source block (4) is multiple.
7. according to claim 1 based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that it is also wrapped
Include thermometer (8) and pressure gauge (7).
8. a kind of based on the flux of moisture measuring device for exempting grade radioactive source, which is characterized in that it includes one section of cylindrical pipe
(1) and position in the inner and the taper throttling element (2) that is coaxially arranged, the taper throttling element (2) include altogether bottom surface be arranged
Head conical section (22) and tail conical section (23), wherein moisture of the head conical section (22) in face of the cylindrical pipe (1)
Entrance limits a tapered annular space space between the inner wall and the conical surface of head conical section (22) of the cylindrical pipe (1)
(9) so that moisture passes through；It is provided on the conical surface of the head conical section (22) and exempts grade radiation source block (4), arrangement
So that its gamma ray released is radially broken through the tapered annular space space (9) and is reached and is located at cylindrical pipe (1) outside
The gamma-ray detector (5) in portion, wherein passing through the radial width of the tapered annular space space (9) at place for the gamma ray
Less than 50mm.
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| CN2017217118692 | 2017-12-11 | ||
| CN201721711869 | 2017-12-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843308A (en) * | 2017-12-11 | 2018-03-27 | 无锡洋湃科技有限公司 | A kind of flux of moisture measurement apparatus based on exemption level radioactive source |
| WO2019113741A1 (en) * | 2017-12-11 | 2019-06-20 | 无锡洋湃科技有限公司 | Wet gas flow measurement device based on exempt radioactive source |
-
2017
- 2017-12-21 CN CN201721804844.7U patent/CN207610739U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843308A (en) * | 2017-12-11 | 2018-03-27 | 无锡洋湃科技有限公司 | A kind of flux of moisture measurement apparatus based on exemption level radioactive source |
| WO2019113741A1 (en) * | 2017-12-11 | 2019-06-20 | 无锡洋湃科技有限公司 | Wet gas flow measurement device based on exempt radioactive source |
| US11199428B2 (en) | 2017-12-11 | 2021-12-14 | Wuxi Sea Pioneers Technologies Co., Ltd | Device for measuring flow rate of wet gas based on an exempt radioactive source |
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Effective date of registration: 20201106 Address after: 610000 no.1001-1002, unit 1, building 4, Tianfu Vanke Yuncheng, No.818, Hupan Road, Xinglong Street, Tianfu New District, Chengdu, Sichuan Province Patentee after: Chengdu Yangpai Technology Co.,Ltd. Address before: 214187, No. 8, Chun Ying Road, Luoyang Social Development Zone, Huishan Economic Development Zone, Jiangsu, Wuxi Patentee before: Wuxi Sea Pioneers Technologies Co.,Ltd. |