CN106441471A - Heavy caliber ultrasonic flowmeter - Google Patents

Heavy caliber ultrasonic flowmeter Download PDF

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Publication number
CN106441471A
CN106441471A CN201610899986.XA CN201610899986A CN106441471A CN 106441471 A CN106441471 A CN 106441471A CN 201610899986 A CN201610899986 A CN 201610899986A CN 106441471 A CN106441471 A CN 106441471A
Authority
CN
China
Prior art keywords
location hole
transducer
housing
ultrasonic flowmeter
heavy caliber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610899986.XA
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Chinese (zh)
Inventor
方欣
李新兴
司韵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
QINGDAO HIWITS METER CO Ltd
Original Assignee
QINGDAO HIWITS METER CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by QINGDAO HIWITS METER CO Ltd filed Critical QINGDAO HIWITS METER CO Ltd
Priority to CN201610899986.XA priority Critical patent/CN106441471A/en
Publication of CN106441471A publication Critical patent/CN106441471A/en
Priority to PCT/CN2017/106100 priority patent/WO2018068764A1/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/662Constructional details

Abstract

The invention discloses a heavy caliber ultrasonic flowmeter. The heavy caliber ultrasonic flowmeter comprises a tubulation shell body and energy converter modules, location holes are formed in two ends of the tubulation shell body, the location holes are vertical to an axis of the tubulation shell body, the energy converter modules are arranged in the location holes, two energy converter modules form a group and are used cooperatively. Due to the arrangement that the location holes are vertical to the tubulation shell body, the energy converters can be close to the two ends of the tubulation shell body to the maximum, the biggest projection distance of a line between the energy converters on the axis of the tubulation is obtained in a tubulation range of a limited length, and a measuring range ratio and measuring accuracy of the ultrasonic flowmeter are increased.

Description

A kind of heavy caliber ultrasonic flowmeter
Technical field
The present invention relates to field of flow measurement, it is specifically designed a kind of heavy caliber ultrasonic pipe segment structure.
Background technology
Ultrasonic flowmeter is compared with measuring accuracy height with traditional mechanical flow instrument, electromagnetic flow instrument, Hardly affected by parameters such as detected fluid temperature, pressure, density, the strong adaptability to caliber, easy to use it is easy to digitlization The advantages of management.At present, ultrasonic flowmeter has been widely applied to the industry stream such as heavy caliber calorimeter and large-diameter water meter In measurement field.In actual applications, the range ability to ultrasonic flowmeter and measuring accuracy have higher demand.
The method of the range and measuring accuracy that improve flowmeter mainly has two kinds:One kind is to process meter spool piece necking down To improve fluid-flow rate, but the shortcoming of the method is to increase the resistance of ducting;Another kind of way is in limited pipe range model Increase the distance between transducer i.e. Acoustic Wave Propagation distance, while improving range and measuring accuracy, Bu Huizeng in enclosing as far as possible Plus pipeline fluid resistance.Between the range of ultrasonic flowmeter and measuring accuracy and two transducers, line is on pipeline section axis Projector distance is proportional.
Authorize supersonic flow disclosed in publication number CN 201993129 U, CN 204855038 U and CN 204330187 U Transducer installation site in gauge because tilt aperture mechanical processing technique need and structure design itself restriction so that Transducer can be only installed at apart from flange remote position, greatly reduce between transducer projection on pipeline section axis for the line away from From.
Ensure the installation not affecting instrument flange plate bolt that machining is convenient and it is after installing of transducer assemblies, with When increase projector distance on pipeline section axis for the line between two transducers to greatest extent, transducer position selects and transducing Device mounting structure optimization just becomes a difficult point problem.
Content of the invention
Transducer installation site for existing ultrasonic flowmeter is relatively near so that line is in pipe between two transducers Projector distance on section axis is shorter, reduces the range of flowmeter and the problem of measuring accuracy, the invention provides a kind of big Bore ultrasonic flowmeter.
A kind of large aperture ultrasonic flowmeter, including pipeline section housing and transducer assemblies, the setting of described pipeline section housing two ends There is location hole, described location hole is vertical with the axis of described pipeline section housing, and described transducer assemblies are arranged in described location hole, Described transducer assemblies two are one group, use cooperatively, described two transducer assemblies using cooperatively are used for launching and receive Ultrasonic wave, described ultrasonic wave propagation path is formed an angle with described pipeline section housing axis.
Beneficial effects of the present invention:
1. location hole vertical tube piece housing axis setting, compared with the location hole being obliquely installed of prior art, location hole Cutting line is vertical tube piece housing diameter in process, and cutting line will not be interfered with flange, reduces difficulty of processing, It is easy to ensure machining accuracy, reduce processing cost, line centering positioning is simpler.
2. the installation of transducer assemblies will not interfere with flange, also will not hinder the installation of bolt on flange, so Positioning can be arranged on apart from the nearer position of flange.Under conditions of pipeline section shell length is certain, the setting of transducer assemblies Positional distance flange is nearer, and the sound path of ultrasonic wave is bigger.
Brief description
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the overall structure diagram of embodiment 2;
Fig. 3 is the front view of embodiment 2;
Fig. 4 is the sectional view along A-A for the Fig. 3;
Fig. 5 is B portion partial enlarged view in Fig. 4;
Fig. 6,7 be embodiment 2 transducer assemblies explosive view;
Fig. 8 is flowmeter measuring principle schematic diagram calculation,
Fig. 9 is the present invention and prior art comparing calculation figure.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, technical scheme is described further.
A kind of heavy caliber ultrasonic flowmeter that the present invention provides, including pipeline section housing 1 and transducer assemblies 2.Pipeline section shell Body 1 two ends are provided with location hole 17, and location hole 17 is vertical with the axis of pipeline section housing 1, for fixedly mounting transducer assemblies 2. Transducer assemblies 2 two are one group, use cooperatively.Two transducer assemblies using cooperatively 2 are used for launching and receive ultrasonic wave, Ultrasonic wave propagation path is formed an angle with described pipeline section housing 1 axis, and pipeline section housing 1 two ends are respectively arranged with flange 13.
In prior art, location hole is obliquely installed mode, for example:Authorization Notice No. is the patent of CN 204855038 U So that location hole can not be too near apart from flange 13, reason has two to file:One is during processing inclined, the rail of feed Mark can be interfered with flange 13, need to reserve enough feed spaces;Two is when installing transducer assemblies 2, easy and flange 13 interference, and hinder the installation of bolt on flange 13, enough installing spaces need to be reserved.
The location hole 17 of the present invention, perpendicular to pipeline section housing 1 set-up mode, overcomes above-mentioned two technical problem, with respect to In prior art (Authorization Notice No. CN 204855038 U), location hole is obliquely installed mode so that location hole 17 is in process Middle cutting line is vertical tube piece housing 1 diameter, and cutting line will not be interfered with flange 13, reduces difficulty of processing it is easy to protect Card machining accuracy, reduces processing cost, and line centering positioning is simpler;Additionally, the installation of transducer assemblies 2 also will not and method Blue 13 interfere, and also will not hinder the installation of bolt on flange, thus positioning 17 can be arranged on nearer apart from flange 13 Position.Under conditions of pipeline section housing 1 length is certain, the set location of transducer assemblies 2 is nearer apart from flange 13, ultrasonic wave Sound path is bigger.
Ultrasonic wave just carries the information of upper rate of flow of fluid when propagating in the fluid of flowing.Therefore pass through the ultrasonic wave receiving The flow velocity of fluid just can be detected, thus being converted into flow.Two transducer assemblies 2 being used in conjunction with each other are launched super simultaneously Sound wave, then receives launched ultrasonic wave, as shown in figure 8, pipeline section shell just can be calculated according to the time difference Δ t receiving Fluid flow in body 1:
c1=c+Va=c+VAveragelyCos α, the following current velocity of sound
c2=c-Va=c-VAveragelyCos α, the adverse current velocity of sound
t1=L/c1, the following current time
t2=L/c2, the adverse current time
C > > VAveragely
The minimum of a value that present tense poor chip can calculate time difference △ t is 2.5nS, can be seen that in △ t from formula above Increase L value under conditions of=2.5nS is constant and can be effectively reduced VAveragelyValue is that flowmeter can measure less flow velocity, improves The range ratio of flowmeter.
Δ t is limited to chip precision, Δ tMinimum=2.5ns
Formulate constant K,
Wherein:
C=ultrasonic wave is in fluid to be measured medium velocity
c1=remove journey ultrasonic velocity
t1=go the journey time
c2=return ultrasonic speed
t2=return interval
Δ t=goes return interval poor
VAveragely=intraluminal fluid (gas) the body minimum average B configuration flow velocity that can measure
α=transducer direct rays and pipeline section housing axis angle
To penetrating distance between L=transducer, i.e. sound path
V α represents speed on transducer direct rays direction for the fluid and (sees for horizontal pipe, be an oblique line, it is level The component of amount)
A and B is the transducer being mutually paired use
It can be seen that, when K is constant, pipeline section housing 1 is all arranged according to GB, in pipeline section housing 1 diameter and length one timing, L is bigger, and α is less, and cos α value is bigger, so VAveragelyIt is inversely proportional to L, i.e. the bigger V of LAveragelyLess.
The minimum of a value that when poor chip more advanced at present can calculate time difference Δ t is 2.5nS, this value be (chip and Circuit) under certain distance, certain speed, flowmeter can get the minimum time difference that institute's flow measurement accuracy of measurement meets 1% requirement. Can be seen that under conditions of Δ t=2.5ns is constant from formula above, increase L value and can be effectively reduced VAveragely, i.e. flowmeter Less flow velocity can be measured, thus improve the range ratio of flowmeter.
Wherein:
Range ratio=the Q3/Q1 of flowmeter,
Q3 is the conventional flow of certain model flowmeter, is definite value,
Q1 is the minimum discharge meeting GB error requirements,
Q=S*V*T,
Q- fluid flow,
S- sectional area,
V- flow velocity,
The T- time.
When pipe diameter D determines, sectional area S determines, the flow Q1 and flow velocity V of unit intervalAveragelyIt is directly proportional, i.e. VAveragelyMore Little, Q1 is less, and range ratio Q3/Q1 is bigger.
Flowmeter disclosed by the invention, arranged by the vertical tube piece housing 1 of location hole 17 so that transducer assemblies 2 Limits are arranged near flange 13, obtain the ultrasonic wave sound path L of maximum, thus reducing on the pipeline section housing 1 of certain length VAveragely, the minimum discharge that flowmeter can measure is less, improves the range ratio of flowmeter.
As shown in figure 9, according to positioning of the prior art. taking nominal diameter DN300 (a diameter of 300mm of pipe) as a example The tilted-putted mode in hole 17, α is 55 °, and maximum sound path is 367mm, and projector distance on pipeline section housing 1 axis for the sound path is 211mm.And mode is vertically arranged using the location hole 17 of the present invention, obtainable α is 45 °, and maximum sound path is 389mm, sound path Projector distance on pipeline section housing 1 axis be 275mm, compared to existing technology, projection on pipeline section housing 1 axis for the sound path away from From increasing 30.5%.
α is that minimum discharge when 55 ° compares Q55 is minimumIt is that minimum discharge when 45 ° compares Q with α45 is minimumRatio be:
So the range ratio that the location hole 17 of the present invention is vertically arranged the flowmeter of mode is 1.304 times of prior art.
As shown in figure 1, pipeline section housing 1 two ends are respectively arranged with two flanges 13, flange 13 is provided with bolt hole, by spiral shell Tether the pipeline connecing flow to be measured.Pipeline section housing 1 two ends are provided with two location holes 17 at flange 13, are located at respectively The downside at pipeline section housing 1 about two ends and upside, location hole 17 is used for installing position transducer assembly 2, location hole 17 perpendicular to Pipeline section housing 1 is arranged.Transducer assemblies 2-1 is used cooperatively with transducer assemblies 2-2, each setting one in two transducer assemblies 2 Individual transducer 202, transducer 202 is partly convex to be exposed at outside transducer assemblies 2.The direction of the launch of two transducers 202 and pipeline section The axis of housing 1 is angled.Circuit box 4 is arranged at pipeline section housing 1 middle part, is provided with controller in circuit box 4.Change The electric wire of energy device 202 is connected with controller through penetration pipe 5.In the range of certain length of pipe section, in order to improve flowmeter Range and measuring accuracy, location hole 17 is installed not affecting and should be set near flange 13 to greatest extent in the case of processing Put, to increase between two transducer 202 surface to penetrating projector distance on pipeline section housing 1 axis for the spacing.For without prejudice to flange 13 installation, the outward flange height of location hole 17 should be less than the height of the bolt hole of flange 13.
It should be understood that multiple transducers 202 can be arranged in transducer assemblies 2, in transducer assemblies 2, arrange two Individual transducer 202 is more excellent scheme.The transducer assemblies being used in conjunction with each other 2 two can arrange some groups for one group.Surveying During amount fluid flow.Multigroup transducer assemblies 2 can mutually compare, and prevents the flow that individual transducers assembly 2 damages and records Inaccurate, other transducer assemblies 2 can also stay do standby.For example, pipeline section housing 1 is nominal DN300 bore, transducer group Part 2 two is one group, is provided with 8 groups of transducer assemblies 2 altogether, is provided with 2 transducers 202 in each ring energy device assembly 2.
Embodiment 2, as shown in Figure 2,3, 4, arranges two groups of transducer assemblies 2 in pipeline section housing 1, first group:Transducer Assembly 2-1 is used cooperatively with transducer assemblies 2-2, second group:Transducer assemblies 2-3 is used cooperatively with transducer assemblies 2-4.
As shown in Fig. 5,6,7, transducer assemblies 2 include housing 201 and 2 transducers 202, housing 201 is provided with The locating surface 208 of location hole 17 cooperation, housing 201 is additionally provided with 203,2 transducers 202 in 2 diagonally-installed holes and pacifies respectively It is loaded in 2 installing holes 203.There is step surface transducer 202 end, matches with the step surface on installing hole 203, transducer 202 install fixing rearward end is convex is exposed at hull outside, and stretch in pipeline section housing 1.
As shown in Figure 6,7, for fixing of energy converter 202, transducer assemblies 2 also include fixed plate 211 and sealing ring 210. Fixed plate 211 is detachably connected by screw 212 with housing 201.Sealing ring 210 be arranged at fixed plate 211 and transducer 202 it Between, in order to prevent liquid from flowing in housing 201 through the gap between installing hole 203 and transducer 202.
As shown in Figure 6,7, in order to be fixed on housing 201 in location hole 17, transducer assemblies also include pressure ring 207, on Sealing ring 205 and lower seal 204.As shown in figure 5, being provided with step surface 171 in location hole 17, coordinate with locating surface 208.Under Sealing ring 204 is arranged on locating surface 208, for preventing the gap through housing 201 and location hole 17 for the liquid from flowing in housing 201 Portion.In order to compress housing 201 with location hole 17, pressure ring 207 is threadeded with location hole 17, but is not limited only to this.Upper sealing Circle 205 is arranged between pressure ring 207 and described housing 201, prevents foreign matter from entering inside housing 201.
As shown in Figure 6,7, in order to prevent transducer assemblies 2 from rotating in location hole 17, transducer assemblies 2 also include positioning Pressing plate 206 and alignment pin 213.Positioning pressuring plate 206 is provided with the first location hole 2062 being adapted to alignment pin 213.Housing 201 sets It is equipped with the second location hole 214 being adapted to alignment pin 213, alignment pin 213 passes through the first location hole 2062 and the second location hole 214, prevent housing 201 from relatively rotating with positioning pressuring plate 206, alignment pin 213, the first location hole 2062 and the second location hole 214 More than one should be set, and the present embodiment arranges three.Positioning pressuring plate 206 is provided with anti-rotation projection 2061, and location hole 17 is provided with The draw-in groove being adapted with anti-rotation projection 2061, prevents positioning pressuring plate 206 from relatively rotating with location hole 17.Positioning pressuring plate 206 is arranged Between upper sealing ring 205 and pressure ring 207, pad 209 is arranged between positioning pressuring plate 206 and pressure ring 207.Pad 209 is poly- Tetrafluoro spacer, avoids positioning pressuring plate 206 and pressure ring 207 frictionally damage in order to easy for installation.
As shown in figure 5, in order to prevent foreign matter from entering in location hole, being provided with end cap 14 and O-ring 11, end cap 14 with Location hole 17 is threaded, and O-ring 11 is arranged between end cap 14 and location hole 17.

Claims (8)

1. a kind of heavy caliber ultrasonic flowmeter it is characterised in that:Including pipeline section housing (1) and transducer assemblies (2), described pipe Piece housing (1) two ends are provided with location hole (17), and described location hole (17) is vertical with the axis of pipeline section housing (1), described transducing Device assembly (2) is arranged in location hole (17), and described transducer assemblies (2) two are one group, use cooperatively, described two cooperations The transducer assemblies (2) using are respectively used to launch and receive ultrasonic wave, described ultrasonic wave propagation path and pipeline section housing (1) axle Line forms an angle.
2. heavy caliber ultrasonic flowmeter as claimed in claim 1 it is characterised in that:Described transducer assemblies (2) include shell Body (201) and transducer (202), described location hole (17) is provided with step surface (171), described housing (201) is provided with The locating surface (208) that described location hole (17) step surface (171) coordinates, described housing (201) is additionally provided with diagonally-installed hole (203), described transducer (202) is installed in described installing hole (203).
3. heavy caliber ultrasonic flowmeter as claimed in claim 2 it is characterised in that:Described transducer assemblies (2) also include Fixed plate (211) and sealing ring (210), described fixed plate (211) is detachably connected by screw (212) with housing (201), institute State fixed plate (211) for fixing of energy converter (202), described sealing ring (210) is arranged at fixed plate (211) and transducer (202) between.
4. heavy caliber ultrasonic flowmeter as claimed in claim 3 it is characterised in that:Described transducer assemblies (2) also include Pressure ring (207), upper sealing ring (205) and lower seal (204), described lower seal (204) is arranged at described locating surface (208) On, described pressure ring (207) is threadeded with location hole (17), and described pressure ring (207) is used for fixed shell (201), described close Seal (205) is arranged between pressure ring (207) and housing (201).
5. heavy caliber ultrasonic flowmeter as claimed in claim 4 it is characterised in that:Described transducer assemblies (2) also include Positioning pressuring plate (206), pad (209) and alignment pin (213), described positioning pressuring plate (206) is provided with and is adapted to alignment pin (213) The first location hole (2062), described housing (201) is provided with the second location hole (214) being adapted to alignment pin (213), described Alignment pin (213) passes through described first location hole (2062) and described second location hole (214), and described positioning pressuring plate (206) sets It is equipped with anti-rotation projection (2061), described location hole (17) is provided with the draw-in groove being adapted with described anti-rotation projection (2061), described Positioning pressuring plate (206) is arranged between described upper sealing ring (205) and pressure ring (207), and it is described fixed that described pad (209) is arranged at Between position pressing plate (206) and described pressure ring (207), described alignment pin (213), the first location hole (2062) and the second location hole (214) more than one is set.
6. heavy caliber ultrasonic flowmeter as claimed in claim 5 it is characterised in that:Also include end cap (14) and O-ring (11), described end cap (14) is threadeded with location hole (17), and described O-ring (11) is arranged at end cap (14) and location hole (17) Between.
7. heavy caliber ultrasonic flowmeter as claimed in claim 1 it is characterised in that:Also include controller and circuit box (4), Described circuit box (4) is arranged at pipeline section housing (1) outside, and described controller is arranged in described circuit box (4), described controller Electrically connect with described transducer (202).
8. the heavy caliber ultrasonic flowmeter as described in any one of claim 1-7 it is characterised in that:One transducer group It is provided with two transducers (202), described transducer assemblies (2) can arrange some groups in part (2).
CN201610899986.XA 2016-10-14 2016-10-14 Heavy caliber ultrasonic flowmeter Pending CN106441471A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201610899986.XA CN106441471A (en) 2016-10-14 2016-10-14 Heavy caliber ultrasonic flowmeter
PCT/CN2017/106100 WO2018068764A1 (en) 2016-10-14 2017-10-13 Large-diameter ultrasonic flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610899986.XA CN106441471A (en) 2016-10-14 2016-10-14 Heavy caliber ultrasonic flowmeter

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Publication Number Publication Date
CN106441471A true CN106441471A (en) 2017-02-22

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WO (1) WO2018068764A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108572015A (en) * 2017-12-31 2018-09-25 深圳市前海海洋仪表科技有限公司 The ultrasonic water meter of deflection installation detecting pipe

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CN102384773B (en) * 2011-11-10 2012-11-07 吉林市宏远仪表有限责任公司 N-type reflection flow tube for ultrasonic heat meter
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108572015A (en) * 2017-12-31 2018-09-25 深圳市前海海洋仪表科技有限公司 The ultrasonic water meter of deflection installation detecting pipe

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