CN206146473U - Heavy -calibre ultrasonic flowmeter - Google Patents
Heavy -calibre ultrasonic flowmeter Download PDFInfo
- Publication number
- CN206146473U CN206146473U CN201621125968.8U CN201621125968U CN206146473U CN 206146473 U CN206146473 U CN 206146473U CN 201621125968 U CN201621125968 U CN 201621125968U CN 206146473 U CN206146473 U CN 206146473U
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- China
- Prior art keywords
- location hole
- transducer
- housing
- pipeline section
- transducer assemblies
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- 239000004429 Calibre Substances 0.000 title abstract 2
- 230000000712 assembly Effects 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 2
- 230000002463 transducing Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 11
- 238000005520 cutting process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000149 penetrating Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001902 propagating Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model discloses a heavy -calibre ultrasonic flowmeter, including pipeline section casing and transducer element, pipeline section casing both ends are provided with the locating hole, the locating hole is perpendicular with the axis of pipeline section casing, and transducer element sets up in the locating hole, and two transducer element are a set of, and the cooperation is used. Because locating hole perpendicular to the pipeline section casing sets up for the transducer can furthest be close to pipeline section casing both ends, obtained the projection distance of line on the pipeline section axis between the biggest transducer at the pipeline section within range of limited length, the range that has increased the wave current gauge than and measuring accuracy.
Description
Technical field
The utility model is related to field of flow measurement, 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 is easy to use, it is easy to digitize
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, there is higher demand to the range ability and measuring accuracy of ultrasonic flowmeter.
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 range and measuring accuracy is improved, Bu Huizeng in enclosing as far as possible
Plus pipeline fluid resistance.Line is on pipeline section axis between the range and measuring accuracy of ultrasonic flowmeter and two transducers
Projector distance is proportional.
Authorize publication number CN 201993129 U, CN 204855038 U and supersonic flow disclosed in the U of CN 204330187
Transducer installation site in gauge is because the mechanical processing technique for inclining aperture needs the restriction with structure design itself so that
Transducer can be only installed at apart from flange remote position, greatly reduce between transducer projection of the line on pipeline section axis away from
From.
The installation of instrument flange plate bolt is not affected after the machining facility of guarantee transducer assemblies and its installation, together
When increase projector distance of the line on pipeline section axis between two transducers to greatest extent, transducer position is selected and transducing
The optimization of device mounting structure just becomes a difficult point problem.
The content of the invention
It is nearer for the transducer installation site of existing ultrasonic flowmeter 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, and the utility model provides one
Plant heavy caliber ultrasonic flowmeter.
A kind of large aperture ultrasonic flowmeter, including pipeline section housing and transducer assemblies, the pipeline section housing two ends are arranged
There is location hole, the location hole is vertical with the axis of the pipeline section housing, and the transducer assemblies are arranged in the location hole,
The transducer assemblies two are one group, are used cooperatively, and described two transducer assemblies for using cooperatively are used to launch and receive
Ultrasonic wave, the ultrasonic wave propagation path forms an angle with the pipeline section housing axis.
The beneficial effects of the utility model：
1. location hole vertical tube piece housing axis is arranged, compared with the location hole being obliquely installed of prior art, location hole
In process cutting line is vertical tube piece housing diameter, and cutting line will not interfere with flange, reduce 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 be interfered with flange, will not also 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.
Description of the drawings
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 sectional views of the Fig. 3 along A-A；
Fig. 5 is B portions partial enlarged view in Fig. 4；
Fig. 6,7 for embodiment 2 transducer assemblies explosive view；
Fig. 8 is flowmeter measuring principle schematic diagram calculation,
Fig. 9 is the utility model and prior art comparing calculation figure.
Specific embodiment
With reference to the accompanying drawing in the utility model embodiment, the technical solution of the utility model is described further.
A kind of heavy caliber ultrasonic flowmeter that the utility model is provided, including pipeline section housing 1 and transducer assemblies 2.Pipe
The two ends of piece housing 1 are provided with location hole 17, and location hole 17 is vertical with the axis of pipeline section housing 1, for fixedly mounting transducer group
Part 2.Transducer assemblies 2 two are one group, are used cooperatively.Two transducer assemblies 2 for using cooperatively are used to launch and receive super
Sound wave, ultrasonic wave propagation path forms an angle with the axis of pipeline section housing 1, and the two ends of pipeline section housing 1 are respectively arranged with flange
13。
Location hole is obliquely installed mode in prior art, for example：Authorization Notice No. is the patent of the U of CN 204855038
File so that location hole can not be too near apart from flange 13, and reason has two：One is the rail of feed during processing inclined
Mark can interfere with flange 13, need to reserve enough feed spaces；Two is when transducer assemblies 2 are installed, easily and flange
13 interfere, and hinder the installation of bolt on flange 13, need to reserve enough installing spaces.
Location hole of the present utility model 17 overcomes above-mentioned two technical problem, phase perpendicular to the set-up mode of pipeline section housing 1
For location hole is obliquely installed mode in prior art (U of Authorization Notice No. CN 204855038) so that location hole 17 is in processing
During cutting line be the diameter of vertical tube piece housing 1, cutting line will not interfere with flange 13, reduce difficulty of processing, easily
In machining accuracy is ensured, processing cost is reduced, line centering positioning is simpler；Additionally, the installation of transducer assemblies 2 also will not
Interfere with flange 13, will not also hinder the installation of bolt on flange, thus positioning 17 can be arranged on apart from flange 13 compared with
Near position.Under conditions of the length of pipeline section housing 1 is certain, the set location of transducer assemblies 2 is nearer apart from flange 13, ultrasound
The sound path of ripple is bigger.
Ultrasonic wave just carries the information of upper rate of flow of fluid when propagating in the fluid of flowing.Therefore the ultrasonic wave for receiving is passed through
The flow velocity of fluid can be just detected, so as to be 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, can just calculate pipeline section shell according to the time difference Δ t for 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
It is 2.5nS that present tense poor chip can calculate the minimum of a value of time difference △ t, be can be seen that in △ t from formula above
L values are increased under conditions of=2.5nS is constant can be effectively reduced VAveragelyValue is that flowmeter can measure less flow velocity, is improved
The range ratio of flowmeter.
Δ t is limited to chip precision, Δ tIt is minimum=2.5ns
Constant K is formulated,
Wherein：
C=ultrasonic waves are 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 be measured
α=transducer direct rays and pipeline section housing axis angle
To penetrating distance, i.e. sound path between L=transducers
It (is an oblique line for horizontal pipe is seen, it is level that V α represent speed of the fluid on transducer direct rays direction
The component of amount)
A and B are to be mutually paired the transducer for using
It can be seen that, when K is constant, pipeline section housing 1 is arranged according to GB, in the diameter of pipeline section housing 1 and the timing of length one,
L is bigger, and α is less, and cos α values are bigger, so VAveragelyBe inversely proportional to L, i.e. the bigger V of LAveragelyIt is less.
It is 2.5nS that at present more advanced when poor chip can calculate the minimum of a value of time difference Δ t, this value be (chip and
Circuit) under certain distance, certain speed, flowmeter is obtained institute's flow measurement accuracy of measurement and meets 1% desired minimum time difference.
Can be seen that under conditions of Δ t=2.5ns is constant from formula above, increasing L values can be effectively reduced VAveragely, i.e. flowmeter
Less flow velocity can be measured, so as to 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 for meeting GB error requirements,
Q=S*V*T,
Q- fluid flows,
S- sectional areas,
V- flow velocitys,
The T- times.
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 in the utility model, is arranged so that transducer assemblies by the vertical tube piece housing 1 of location hole 17
2 are arranged to greatest extent near flange 13, the ultrasonic wave sound path L of maximum are obtained on the pipeline section housing 1 of certain length, so as to drop
Low VAveragely, the minimum discharge that flowmeter can be measured is less, improves the range ratio of flowmeter.
As shown in figure 9, by taking nominal diameter DN300 (a diameter of 300mm of pipe) as an example, according to positioning of the prior art
The tilted-putted mode in hole 17, α is 55 °, and maximum sound path is 367mm, and projector distance of the sound path on the axis of pipeline section housing 1 is
211mm.And mode is vertically arranged using location hole of the present utility model 17, obtainable α is 45 °, and maximum sound path is 389mm,
Projector distance of the sound path on the axis of pipeline section housing 1 is 275mm, compared to existing technology, throwing of the sound path on the axis of pipeline section housing 1
Shadow distance increases 30.5%.
Minimum discharge when α is 55 ° compares Q55 is minimumMinimum discharge when with α being 45 ° compares Q45 is minimumRatio be：
So location hole of the present utility model 17 is vertically arranged 1.304 that the range ratio of the flowmeter of mode is prior art
Times.
As shown in figure 1, the two ends of pipeline section housing 1 are respectively arranged with two flanges 13, flange 13 is provided with bolt hole, by spiral shell
Tether and connect the pipeline to be measured flow.The two ends of pipeline section housing 1 are provided with two location holes 17 at flange 13, are located at respectively
The downside and upside at the two ends of pipeline section housing 1 or so, location hole 17 is used to install position transducer component 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 in two transducer assemblies 2 to arrange one
Individual transducer 202, the part of transducer 202 is convex to be exposed at outside transducer assemblies 2.The direction of the launch and pipeline section of two transducers 202
The axis of housing 1 is angled.Circuit box 4 is arranged at the middle part of pipeline section housing 1, and in circuit box 4 controller is provided with.Change
The electric wire of energy device 202 is connected through penetration pipe 5 with controller.In the range of certain length of pipe section, in order to improve flowmeter
Range and measuring accuracy, location hole 17 set to greatest extent in the case where not affecting to install and process near flange 13
Put, to increase between the surface of two transducer 202 to penetrating projector distance of the spacing on the axis of pipeline section housing 1.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 a transducer assemblies 2 two are arranged
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 be compareed mutually, the flow for preventing individual transducers component 2 from damaging and measuring
Inaccurate, other transducer assemblies 2 can also be stayed and do standby.For example, pipeline section housing 1 be nominal DN300 bores, transducer group
Part 2 two is one group, and 8 groups of transducer assemblies 2 are provided with altogether, and in each ring energy device assembly 22 transducers 202 are provided with.
Embodiment 2, as shown in Figure 2,3, 4, arranges two groups of transducer assemblies 2 in pipeline section housing 1, first group：Transducer
Component 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, be provided with housing 201 with
The locating surface 208 that location hole 17 coordinates, is additionally provided with 2 203,2, diagonally-installed hole transducers 202 and pacifies respectively on housing 201
Loaded in 2 installing holes 203.There is step surface the end of transducer 202, is engaged with the step surface on installing hole 203, transducer
202 install it is fixed 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 with housing 201 by screw 212.Sealing ring 210 be arranged at fixed plate 211 and transducer 202 it
Between, in order to prevent the gap between liquid Jing installing holes 203 and transducer 202 from flowing in housing 201.
As shown in Figure 6,7, in order to housing 201 is fixed 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 liquid Jing housings 201 from flowing in housing 201 with the gap of location hole 17
Portion.In order to housing 201 is compressed with location hole 17, pressure ring 207 is threadedly coupled with location hole 17, but is not limited only to this.Upper sealing
Circle 205 is arranged between pressure ring 207 and the 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
The second location hole 214 being adapted to alignment pin 213 is equipped with, alignment pin 213 is 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, in order to easy for installation positioning pressuring plate 206 and the frictionally damage of pressure ring 207 are avoided.
As shown in figure 5, in order to prevent foreign matter from entering in location hole, be provided with end cap 14 and O-ring 11, end cap 14 with
Location hole 17 is threadedly coupled, 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), the pipe
Piece housing (1) two ends are provided with location hole (17), and the location hole (17) is vertical with the axis of pipeline section housing (1), the transducing
Device assembly (2) is arranged in location hole (17), and the transducer assemblies (2) two are one group, are used cooperatively, described two cooperations
The transducer assemblies (2) for using are respectively used to launch and receive ultrasonic wave, the 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：The transducer assemblies (2) are including shell
Body (201) and transducer (202), the location hole (17) is provided with step surface (171), be provided with the housing (201) with
The locating surface (208) that the location hole (17) step surface (171) coordinates, on the housing (201) diagonally-installed hole is additionally provided with
(203), the transducer (202) is installed in the installing hole (203).
3. heavy caliber ultrasonic flowmeter as claimed in claim 2, it is characterised in that：The transducer assemblies (2) also include
Fixed plate (211) and sealing ring (210), the fixed plate (211) is detachably connected with housing (201) by screw (212), institute
Fixed plate (211) is stated for fixing of energy converter (202), the 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：The transducer assemblies (2) also include
Pressure ring (207), upper sealing ring (205) and lower seal (204), the lower seal (204) is arranged at the locating surface (208)
On, the pressure ring (207) is threadedly coupled with location hole (17), and the pressure ring (207) is described close for fixed shell (201)
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：The transducer assemblies (2) also include
Positioning pressuring plate (206), pad (209) and alignment pin (213), the positioning pressuring plate (206) is provided with and is adapted to alignment pin (213)
The first location hole (2062), the housing (201) is provided with the second location hole (214) being adapted to alignment pin (213), described
Alignment pin (213) sets through first location hole (2062) and second location hole (214), the positioning pressuring plate (206)
Anti-rotation projection (2061) is equipped with, the location hole (17) is provided with the draw-in groove being adapted with anti-rotation projection (2061), described
Positioning pressuring plate (206) is arranged between the upper sealing ring (205) and pressure ring (207), and it is described fixed that the pad (209) is arranged at
Between position pressing plate (206) and the pressure ring (207), the 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), the end cap (14) is threadedly coupled with location hole (17), and the 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),
The circuit box (4) is arranged at pipeline section housing (1) outside, and the controller is arranged in the circuit box (4), the controller
Electrically connect with the 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
Two transducers (202) are provided with part (2), the transducer assemblies (2) can arrange some groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621125968.8U CN206146473U (en) | 2016-10-14 | 2016-10-14 | Heavy -calibre ultrasonic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621125968.8U CN206146473U (en) | 2016-10-14 | 2016-10-14 | Heavy -calibre ultrasonic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206146473U true CN206146473U (en) | 2017-05-03 |
Family
ID=58621174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621125968.8U Active CN206146473U (en) | 2016-10-14 | 2016-10-14 | Heavy -calibre ultrasonic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206146473U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782387A (en) * | 2017-09-27 | 2018-03-09 | 广州方时仪器有限公司 | A kind of structure and installation method of the flow measuring sensor based on time-of-flight method |
| WO2018068764A1 (en) * | 2016-10-14 | 2018-04-19 | 李新兴 | Large-diameter ultrasonic flow meter |
-
2016
- 2016-10-14 CN CN201621125968.8U patent/CN206146473U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018068764A1 (en) * | 2016-10-14 | 2018-04-19 | 李新兴 | Large-diameter ultrasonic flow meter |
| CN107782387A (en) * | 2017-09-27 | 2018-03-09 | 广州方时仪器有限公司 | A kind of structure and installation method of the flow measuring sensor based on time-of-flight method |
| CN107782387B (en) * | 2017-09-27 | 2020-01-14 | 广州方时仪器有限公司 | Structure and installation method of flow measurement sensor based on time-of-flight method |
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