CN207610736U - Bidirectional traffics measuring device - Google Patents
Bidirectional traffics measuring device Download PDFInfo
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- CN207610736U CN207610736U CN201721732793.1U CN201721732793U CN207610736U CN 207610736 U CN207610736 U CN 207610736U CN 201721732793 U CN201721732793 U CN 201721732793U CN 207610736 U CN207610736 U CN 207610736U
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Abstract
A kind of bidirectional traffics measuring device, including measurement pipe, throttling element, support element and Signal sampling and processing unit, wherein：Throttling element is fixed on by support element in measurement pipe, and coaxial with measurement pipe, and throttling element includes the first end and second end of elliposoidal and the equal diameter section between first end and second end, and annular fluid passage is formed between equal diameter section and the inner wall of measurement pipe；The apex of the first end of throttling element is equipped with the first pressure point, is equipped with the second pressure point in the center position of the outer surface of equal diameter section, the axial direction of equal diameter section, the apex of second end is equipped with third pressure point；Signal sampling and processing unit is connected with the first pressure point, the second pressure point and third pressure point respectively, and determines flow direction and flow in measurement pipe according to the pressure signal of the first pressure point, the second pressure point and third pressure point.The bidirectional traffics measuring device can accurately carry out bidirectional traffics measurement.
Description
Technical field
The utility model is related to flow measurement technology field, more particularly to a kind of bidirectional traffics measuring device.
Background technology
If being placed in the throttling element that a circulation area is less than conduit cross-sectional area in the pipeline full of fluid, in pipeline
Fluid beam will result in local contraction or flow separation when by the throttling element, at contraction or separation, static pressure meeting
It reduces, therefore will produce certain pressure difference (also known as differential pressure) before and after throttling element.There are one between this pressure difference and flow
Fixed functional relation, therefore the forward and backward pressure difference measurements flow of the throttling element in measurement merging pipeline can be passed through.
In existing merging pipeline using between stagnation pressure and static pressure pressure difference realize measure various flow sensors with
Orifice plate, calibrating nozzle, Venturi tube, various even speed tubes are the most typical.Wherein, orifice plate, calibrating nozzle, Venturi tube etc. are to pass through
Fluid flows through the contraction that occurs when measuring piece to cause stress difference；Even speed tube is mainly to occur when flowing through measuring piece by fluid
It detaches to cause stress difference.
Differential pressure flowmeter currently on the market is mostly unidirectional measurement, main reason is that most of in industrial system
Flow measurement measures for one-way flow.But also have many devices that bidirectional traffics is needed to measure, such as the work of some mechanical devices
When drain outward, when startup, needs the water filling into device；On the one hand such as some fluid storage devices again are often conveyed to outside
On the other hand fluid needs often internally fluid replacement again.
The above-mentioned orifice plate of generally use or Venturi tube are as throttling element, such as China when progress bidirectional traffics measurement at present
Patent CN201610828386.4, or using cross section in the average rate tubular type flow sensor of symmetrical structure, such as China is specially
Sharp CN201611127116.7 and CN201220384358.5.In addition to this, also be based on electromagnetism, ultrasonic measurement principle and
The flowmeter of mechanical rotor technology development.In these existing flow measurement technologies, standard of the flow regime to measurement in pipeline
Exactness influences very big.Flow regime closer to standard, fully developed pipe stream, get over by the accuracy that flowmeter measures in pipeline
It is high.It is front and back to be fitted with sufficiently long straight pipe and filled with the flowing ensured in pipeline in calibration experiments of the flowmeter before manufacture
Distribution exhibition provides stable perfect condition for the measurement of flow instrument.However in Practical Project in use, being limited to in-site installation
Condition (such as elbow, valve, bypass, expansion joint), it is difficult to ensure that the flow development length before and after flow measurement instrument, to make
It is substantially reduced at the accuracy of flow instrument in actual use.
Therefore, expect to develop a kind of bidirectional traffics measuring device that accuracy is high.
Utility model content
The utility model proposes a kind of bidirectional traffics measuring devices, can accurately carry out bidirectional traffics measurement.
The utility model uses following solution：
A kind of bidirectional traffics measuring device, which is characterized in that including measurement pipe, throttling element, support element and signal acquisition and
Processing unit, wherein：
The throttling element is fixed on by the support element in the measurement pipe, and coaxial with the measurement pipe, the section
Stream part includes the first end and second end of elliposoidal and the equal diameter section between the first end and second end, described etc.
Annular fluid passage is formed between diameter segment and the inner wall of the measurement pipe；
The apex of the first end of the throttling element is equipped with the first pressure point, in the outer surface of the equal diameter section, described
The center position of the axial direction of equal diameter section is equipped with the second pressure point, and the apex of the second end is equipped with third pressure
Point；
The Signal sampling and processing unit is connected with the first pressure point, the second pressure point and third pressure point respectively
It connects, and the stream in the measurement pipe is determined according to the pressure signal of the first pressure point, the second pressure point and third pressure point
Dynamic direction and flow.
Preferably, between the equal diameter section and the first end and second end of the throttling element it is rounding off connection.
Preferably, the Signal sampling and processing unit includes first pressure sensor, second pressure sensor and third
Pressure sensor, the first pressure sensor, second pressure sensor and third pressure sensor respectively by pressure guiding pipe with
The first pressure point, the second pressure point are connected with third pressure point.
Preferably, the Signal sampling and processing unit includes the first differential pressure pickup and the second differential pressure pickup, described
The high voltage interface of first differential pressure pickup is connected with the first pressure point, the high voltage interface of second differential pressure pickup with
The third pressure point is connected, and the low-voltage interface of first differential pressure pickup and the second differential pressure pickup is respectively with described
2 pressure points are connected.
Preferably, the support element includes first group of support element and second group of support element, first group of support element connection
Between the first end and the inner wall of the measurement pipe of the throttling element, including be uniformly distributed in the first end periphery it is more
A first support chip, second group of support element are connected between the second end of the throttling element and the inner wall of the measurement pipe,
Multiple second support chips including the periphery for being uniformly distributed in the second end.
Preferably, first support chip and the second support chip are aerofoil profile, and first support chip and the measurement
The angle between plane where the axis of pipe is equal to the angle between second support chip and the plane.
Preferably, the both ends of the measurement pipe are equipped with flange.
Preferably, the first pressure port, the second pressure port are axially equipped with successively on the tube wall of the measurement pipe
With third pressure port, wherein first pressure port and the first pressure point alignment, second pressure port and described second
Pressure point alignment, the third pressure port and the third pressure point alignment.
Preferably, the bidirectional traffics measuring device further include be each passed through first pressure port, the second pressure port and
The first pressure guiding pipe, the second pressure guiding pipe, the third pressure guiding pipe of third pressure port, and first pressure guiding pipe, the second pressure guiding pipe, third
Control valve is equipped on pressure guiding pipe.
Preferably, the first end of the throttling element and the outer profile of second end are identical.
The beneficial effects of the utility model are：
1, according to the throttling element of fluid mechanics principle optimization design while causing differential pressure, the stream in criterion pipe
State makes the flow regime of measured medium rapidly become standard toroidal open channel flow, avoid in the prior art to flow instrument before and after
The limitation that straight pipe requires.
2, the both ends of throttling element are elliposoidal, while having taken into account convergence pressure and having restored the needs of pressure.It is tested to be situated between
When matter flows through throttling element from any one direction, due to the retardance shunting function of entrance elliposoidal end, can elliposoidal most before
End slightly aggregation stops, and pressure point is arranged here and is conducive to obtain stable pressure signal.When measured medium flows through equal diameter
After annular fluid passage at section, the elliposoidal end in exit gradually guides that flow velocity slows down, pressure is effectively restored, herein
Place's setting pressure point is conducive to obtain stable pressure signal.The end for being usually mistakenly considered throttling element in the prior art is sharper
Sharp resistance is smaller, does not account for sharp throttling element end and is unfavorable for fluid and uniformly disperses around, is unfavorable for generating stabilization
Pressure signal.
3, by the second pressure point set on the outer surface of equal diameter section, the center position of the axial direction of equal diameter section, nothing
Which direction throttling element is flowed through from by measured medium, and the pressure at the second pressure point is minimum always, is made with pressure herein
On the basis of, be conducive to obtain accurate differential pressure value, and then improve the accuracy of flow measurement.
4, support element is distributed in the periphery of two ends of throttling element, and throttling element is aerofoil profile, is connected to throttling element one end
Support element and measurement pipe axis where plane between angle be equal to and be connected to support element and the institute of the throttling element other end
The angle between plane is stated, so as to reduce flow resistance to the maximum extent, improves the accuracy of measurement.
5, the bidirectional traffics measuring device sound construction is reliable, production and processing cost is relatively low, later maintenance workload is small.
The device and method of the utility model have other characteristics and advantages, these characteristics and advantages are from being incorporated herein
Attached drawing and subsequent specific implementation mode in will be apparent, or will be in the attached drawing and subsequent tool being incorporated herein
It is stated in detail in body embodiment, these the drawings and specific embodiments are used together to explain the specific original of the utility model
Reason.
Description of the drawings
The utility model exemplary embodiment is described in more detail in conjunction with the accompanying drawings, the utility model it is above-mentioned
And other purposes, feature and advantage will be apparent, wherein identical in the utility model exemplary embodiment
Reference numeral typically represents same parts.
Fig. 1 shows the flow schematic diagram of measured medium in the case that flow separation occurs.
Fig. 2 shows exemplary embodiment according to the present utility model, is tested and is situated between in the case where not having flow separation
The flow schematic diagram of matter.
Fig. 3 and Fig. 4 shows the bidirectional traffics measuring device of the first exemplary embodiment according to the present utility model respectively
Front view and side view；
Fig. 5 and Fig. 6 shows the bidirectional traffics measuring device of the second exemplary embodiment according to the present utility model respectively
Front view and side view.
Reference sign：
1- throttling elements, 2- support elements, 3- measurement pipes, 4- flanges, 5- first pressure sensors, 6- second pressure sensors,
7- third pressure sensors, 8- Signal sampling and processing units, the first differential pressure pickups of 9-, the second differential pressure pickups of 10-.
Specific implementation mode
The utility model is more fully described below with reference to accompanying drawings.Although showing the preferred of the utility model in attached drawing
Embodiment, however, it is to be appreciated that may be realized in various forms the utility model without should be limited by embodiments set forth here
System.On the contrary, these embodiments are provided so that the utility model is more thorough and complete, and can be by the utility model
Range is completely communicated to those skilled in the art.
The bidirectional traffics measuring device of exemplary embodiment according to the present utility model includes measurement pipe, throttling element, support
Part and Signal sampling and processing unit, wherein：
Throttling element is fixed on by support element in measurement pipe, and coaxial with measurement pipe, and throttling element includes the first of elliposoidal
End and second end and the equal diameter section between first end and second end, form between equal diameter section and the inner wall of measurement pipe
Annular fluid passage；
The apex of the first end of throttling element is equipped with the first pressure point, in the outer surface of equal diameter section, the axis of equal diameter section
It is equipped with the second pressure point to the center position in direction, the apex of second end is equipped with third pressure point；
Signal sampling and processing unit is connected with the first pressure point, the second pressure point and third pressure point respectively, and root
The flow by measurement pipe is calculated according to the pressure signal of the first pressure point, the second pressure point and third pressure point.
In the utility model embodiment, throttling element include the first end and second end of elliposoidal and positioned at first end and
Equal diameter section between second end, whole is in spindle, and it is logical that annular fluid is formed between equal diameter section and the inner wall of measurement pipe
Road.When measured medium flows into measurement pipe cocurrent through throttling element from any one direction, due to the extruding of spindle throttling element, adjust
Whole effect, measured medium smoothly flow into a cricoid, axisymmetric channel.The entrance in the channel by throttling element ellipsoid
Shape end is surrounded with inside pipe wall is measured, cross section gradual transition from big to small, gradually taper up equal diameter section to throttling element with
Measure the annular fluid passage that inside pipe wall surrounds.When measured medium flows into this cricoid channel, flowing velocity gradually increases,
Reach maximum to annular fluid passage, and form the annular channel stream VELOCITY DISTRIBUTION of standard, completely not no flow separation
Occur；Pressure gradually lowers simultaneously, until reaching at annular fluid passage minimum.Later, measured medium is flow to by the ellipse of the other end
Ball-shaped end is continuously decreased with the outlet that is surrounded of inside pipe wall, speed is measured, and pressure gradually rises, and is restored to close to inlet
Pressure.
Always there is certain pressure loss, the pressure in the exit of measurement pipe when flowing through measurement pipe due to measured medium
Power is centainly less than the pressure of inlet, but is above the pressure at equal diameter section.Therefore, in the apex of the first end of throttling element
First pressure point is set, the second pressure is set in the center position of the outer surface of equal diameter section, the axial direction of equal diameter section
Point is arranged third pressure point in the apex of second end, acquires the pressure signal of these three pressure points, so that it may with according to these three
The pressure signal of pressure point determines flow direction and flow in measurement pipe.
Compared with prior art, the bidirectional traffics measuring device of the utility model embodiment has a clear superiority：
1, according to the throttling element of fluid mechanics principle optimization design while causing differential pressure, the stream in criterion pipe
State makes the flow regime of measured medium rapidly become standard toroidal open channel flow, avoid in the prior art to flow instrument before and after
The limitation that straight pipe requires.
2, the both ends of throttling element are elliposoidal, while having taken into account convergence pressure and having restored the needs of pressure.It is tested to be situated between
When matter flows through throttling element from any one direction, due to the retardance shunting function of entrance elliposoidal end, can elliposoidal most before
End slightly aggregation stops, and pressure point is arranged here and is conducive to obtain stable pressure signal.When measured medium flows through equal diameter
After annular fluid passage at section, the elliposoidal end in exit gradually guides that flow velocity slows down, pressure is effectively restored, herein
Place's setting pressure point is conducive to obtain stable pressure signal.The end for being usually mistakenly considered throttling element in the prior art is sharper
Sharp resistance is smaller, does not account for sharp throttling element end and is unfavorable for fluid and uniformly disperses around, is unfavorable for generating stabilization
Pressure signal.
3, by the second pressure point set on the outer surface of equal diameter section, the center position of the axial direction of equal diameter section, nothing
Which direction throttling element is flowed through from by measured medium, and the pressure at the second pressure point is minimum always, is made with pressure herein
On the basis of, be conducive to obtain accurate differential pressure value, and then improve the accuracy of flow measurement.
4, the bidirectional traffics measuring device sound construction is reliable, production and processing cost is relatively low, later maintenance workload is small.
In one example, it is rounding off connection between the equal diameter section and first end and second end of throttling element, has
Effect avoids the generation of the flow separation of Interference Flow state stability.It is easy saving due to lacking this design in the prior art
It flows part side and generates many small whirlpools, cause the generation of flow separation, to interfere the stability of pressure signal, generate signal and make an uproar
Sound.The flowing of measured medium is shown in the case that Fig. 1 and Fig. 2 respectively illustrates flow separation generation and do not have flow separation
It is intended to.From Fig. 1 and Fig. 2 as can be seen that when the equal diameter section of throttling element is that rounding off is connect with end, measured medium stream
Through there is no flow separation when throttling element, whirlpool will not be generated in throttling element side.
In one example, Signal sampling and processing unit includes first pressure sensor, second pressure sensor and
Three pressure sensors, first pressure sensor, second pressure sensor and third pressure sensor pass through pressure guiding pipe and institute respectively
State the first pressure point, the second pressure point is connected with third pressure point.
So that the packaging technology of bidirectional traffics measuring device is simpler fast using three independently installed pressure sensors
It is prompt, easy to replace, it is convenient for later maintenance.The range of pressure sensor can be made more wider than differential pressure pick-up, the work of tolerance
Static pressure bigger.Three independently installed pressure sensors make bidirectional traffics measuring device than the flow measurement device of the prior art
More adapt to the working condition under high pressure.
In one example, Signal sampling and processing unit determines flow direction and the stream in measurement pipe by following steps
Amount：
Signal sampling and processing unit compares the pressure value P c of the pressure value P a and third pressure point of the first pressure point, if
Pa ＞ Pc, then measured medium from the first pressure point to third pressure point flow；If Pa ＜ Pc, measured medium is by third pressure
O'clock to the first pressure point flow；
Calculate the pressure differential Δ between pressure value P a and the higher value in pressure value P c and the pressure value P b of the second pressure point
P, and the volume flow q in measurement pipe is calculated by formula (1)v, the mass flow q in measurement pipe is calculated by formula (2)m：
Wherein：
α is discharge coefficient, is calibrated and is determined by experimental data；
D is the equivalent diameter of annular fluid passage；
ρ is measured medium density.
In one example, Signal sampling and processing unit includes the first differential pressure pickup and the second differential pressure pickup, the
The high voltage interface of one differential pressure pickup is connected with the first pressure point, high voltage interface and the third pressure point of the second differential pressure pickup
It is connected, the low-voltage interface of the first differential pressure pickup and the second differential pressure pickup is connected with the second pressure point respectively.
Three independently arranged pressure sensors are replaced using two differential pressure pickups, number of devices can be simplified, are simplified
Calculating process.
Specifically, Signal sampling and processing unit determines flow direction and the flow in measurement pipe by following steps：
Compare the pressure differential Δ Pb of the pressure differential Δ Pa and the measurement of the second differential pressure pickup of the measurement of the first differential pressure pickup, such as
Fruit Δ Pa ＞ Δ Pb, then measured medium from the first pressure point to third pressure point flow；If Δ Pa<Δ Pb, then measured medium
It is flowed from third pressure o'clock to the first pressure point；
Using the higher value in pressure differential Δ Pa and pressure differential Δ Pb as pressure differential Δ P, and by described in formula (1) calculating
Volume flow q in measurement pipev, the mass flow q in the measurement pipe is calculated by formula (2)m：
Wherein：
α is discharge coefficient；
D is the equivalent diameter of annular fluid passage；
ρ is measured medium density.
In one example, support element includes first group of support element and second group of support element, and first group of support element is connected to
Between the first end of throttling element and the inner wall of measurement pipe, second group of support element be connected to throttling element second end and measurement pipe it is interior
Between wall.Preferably, first group of support element includes multiple first support chips for the periphery for being uniformly distributed in first end, second group of branch
Support member includes multiple second support chips for the periphery for being uniformly distributed in second end.Being uniformly arranged support chip along the periphery of end has
Conducive to firmly fixing throttling element.
In one example, the first support chip and the second support chip are aerofoil profile, and the axis of the first support chip and measurement pipe
The angle between plane where line is equal to the angle between the second support chip and the plane.I.e. along the axis side of measurement pipe
To front support piece is aligned with rear end support chip, so as to reduce flow resistance to the maximum extent, improves the accurate of measurement
Property.
In one example, the first end and second end of throttling element is respectively connected to the inner wall of measurement pipe by 4 support chips.
In one example, the first pressure port, the second pressure are axially equipped with successively on the tube wall of measurement pipe
Hole and third pressure port, wherein the first pressure port and the first pressure point alignment, the second pressure port and the second pressure point alignment, third
Pressure port and third pressure point alignment.Pressure guiding pipe can pass through pressure port to connect pressure point with corresponding sensor.
In one example, the first pressure guiding pipe, the second pressure guiding pipe, third pressure guiding pipe are each passed through the first pressure port, second
Pressure port and third pressure port, and it is equipped with control valve on the first pressure guiding pipe, the second pressure guiding pipe, third pressure guiding pipe.Pass through control
Valve processed can control whether to carry out pressure.
Embodiment 1
Fig. 3 and Fig. 4 shows the bidirectional traffics measuring device of the first exemplary embodiment according to the present utility model respectively
Front view and side view.As shown in Figure 3 and Figure 4, bidirectional traffics measuring device according to first embodiment includes measurement pipe 3, section
Part 1, support element 2 and Signal sampling and processing unit 8 are flowed, wherein：
Throttling element 1 is fixed on by support element 2 in measurement pipe 3, and coaxial with measurement pipe 3, and throttling element 1 is spindle, packet
The first end and second end of elliposoidal and the equal diameter section between first end and second end are included, first end and second end
Outer profile is identical, and annular fluid passage is formed between equal diameter section and the inner wall of measurement pipe 3；
The apex of the first end of throttling element 1 is equipped with the first pressure point A, in the outer surface of equal diameter section, equal diameter section
The center position of axial direction is equipped with the second pressure point B, and the apex of second end is equipped with third pressure point C；
Signal sampling and processing unit is connected with the first pressure point A, the second pressure point B and third pressure point C respectively, and
The flow by measurement pipe is calculated according to the pressure signal of the first pressure point A, the second pressure point B and third pressure point C.
Wherein, it is connected for rounding off between the first end of throttling element 1 and equal diameter section, between second end and equal diameter section
Also it is that rounding off connects.The both ends of throttling element 1 are fixed on by support element 2 in measurement pipe 3, and throttling element 1 and measurement pipe 3 are same
Axis.As shown in Figure 3 and Figure 4, support element 2 include set on throttling element first end 4 support chips and set on the second of throttling element
4 support chips at end, and the folder between the support chip of first end of throttling element and the plane T-T where the axis of measurement pipe
Angle beta is equal to the angle between the support chip and the plane of the second end of throttling element.The both ends of measurement pipe 3 are welded with flange 4,
Measurement pipe 3 can be connect by flange 4 with front and rear pipes.
Wherein, Signal sampling and processing unit includes first pressure sensor 5, second pressure sensor 6 and third pressure
Sensor 7 further includes processor.Three pressure ports are axially drilled through successively on the tube wall of measurement pipe 3, wherein first
Pressure port is aligned with the first pressure point A, and the second pressure port is aligned with the second pressure point B, C pairs of third pressure port and third pressure point
Together.Pressure guiding pipe (for clarity, not all displays) passes through three pressure ports, respectively by the first pressure point A, the second pressure point B
It is connected with third pressure point C with first pressure sensor 5, second pressure sensor 6 and third pressure sensor 7, thus will
Pressure signal at three pressure points is sent to three pressure sensors, and further determines that the flow direction in measurement pipe and stream
Amount.
When measured medium flows to third pressure point C by the first pressure point A in measurement pipe 3, due to throttling element shown in Fig. 4
The retardance shunting function of the elliposoidal end in 1 left side, measured medium can slightly assemble stop in the front end of elliposoidal end, this
Place's pressure is maximum and is measured by first pressure sensor 5, pressure value Pa；Measured medium behind the elliposoidal end in left side,
Speed is gradually accelerated pressure simultaneously and is continuously decreased, until when the center of the equal diameter section of throttling element 1, speed reaches maximum simultaneously
Pressure minimizes, and pressure is measured by second pressure sensor 6 herein, pressure value Pb；Hereafter, measured medium flow velocity gradually drops
Low, pressure is gradually gone up therewith, and when the elliptical head flowing on the right side of throttling element, corresponding pressure is by third pressure sensor 7
It measures, pressure value Pc.
Pressure value P a, Pb, the Pc measured according to three pressure sensors, the processor ratio of Signal sampling and processing unit 8
Compared with the pressure value P c of the pressure value P a and third pressure point of the first pressure point, due to Pa ＞ Pc in this case, it is thus determined that
Measured medium is flowed from the first pressure point to third pressure point.Processor calculates the pressure of pressure value P a and the second pressure point
Pressure differential Δ P between value Pb, and the volume flow q in the measurement pipe is calculated by formula (1)v, calculated by formula (2)
Mass flow q in the measurement pipem。
When measured medium flows to the first pressure point A by third pressure point C in measurement pipe 3, due to throttling element shown in Fig. 4
The retardance shunting function of the elliposoidal end on 1 right side, measured medium can slightly assemble stop in the front end of elliposoidal end, this
Place's pressure is maximum and is measured by third pressure sensor 7, pressure value Pc；Measured medium is behind the elliposoidal end of right side, speed
Degree is gradually accelerated pressure simultaneously and is continuously decreased, until when the center of 1 equal diameter section of throttling element, speed reaches maximum pressure simultaneously
It minimizes, pressure is measured by second pressure sensor 6 herein, pressure value Pb；Hereafter, measured medium flow velocity continuously decreases,
Pressure is gradually gone up therewith, and when flowing to the elliposoidal end on the left of throttling element, corresponding pressure is surveyed by first pressure sensor 5
, pressure value Pa.
Pressure value P a, Pb, the Pc measured according to three pressure sensors, processor compare the pressure value P a of the first pressure point
With the pressure value P c of third pressure point, due to Pa ＜ Pc in this case, it is thus determined that measured medium from third pressure point to
First pressure point flows.Processor calculates the pressure differential Δ P between the pressure value P c and pressure value P b of the second pressure point, and passes through
Formula (1) calculates the volume flow q in the measurement pipev, the mass flow q in the measurement pipe is calculated by formula (2)m。
Embodiment 2
Fig. 5 and Fig. 6 shows the bidirectional traffics measuring device of the second exemplary embodiment according to the present utility model respectively
Front view and side view.As shown in Figure 5 and Figure 6, bidirectional traffics measuring device according to first embodiment includes measurement pipe 3, section
Part 1, support element 2 and Signal sampling and processing unit 8 are flowed, wherein：
Throttling element 1 is fixed on by support element 2 in measurement pipe 3, and coaxial with measurement pipe 3, and throttling element 1 is spindle, packet
The first end and second end of elliposoidal and the equal diameter section between first end and second end are included, first end and second end
Outer profile is identical, and annular fluid passage is formed between equal diameter section and the inner wall of measurement pipe 3；
The apex of the first end of throttling element 1 is equipped with the first pressure point A, in the outer surface of equal diameter section, equal diameter section
The center position of axial direction is equipped with the second pressure point B, and the apex of second end is equipped with third pressure point C；
Signal sampling and processing unit is connected with the first pressure point A, the second pressure point B and third pressure point C respectively, and
The flow by measurement pipe is calculated according to the pressure signal of the first pressure point A, the second pressure point B and third pressure point C.
Wherein, it is connected for rounding off between the first end of throttling element 1 and equal diameter section, between second end and equal diameter section
Also it is that rounding off connects.The both ends of throttling element 1 are respectively fixed on by 4 support chips 2 in measurement pipe 3, and throttling element 1 and measurement
Pipe 3 is coaxial.The both ends of measurement pipe 3 are welded with flange 4, and measurement pipe 3 can be connect by flange 4 with front and rear pipes.
Wherein, Signal sampling and processing unit includes the first differential pressure pickup 9 and the second differential pressure pickup 10.In measurement pipe
Three pressure ports are axially drilled through on 3 tube wall successively, wherein the first pressure port is aligned with the first pressure point A, second
Pressure port is aligned with the second pressure point B, and third pressure port is aligned with third pressure point C.Pressure guiding pipe passes through three pressure ports, by the
The high voltage interface of one differential pressure pickup 9 is connected with the first pressure point A, by the high voltage interface and third of the second differential pressure pickup 10
Pressure point C is connected, by the low-voltage interface of the first differential pressure pickup 9 and the second differential pressure pickup 10 respectively with the second pressure point B
It is connected, to which the pressure signal at three pressure points is sent to two differential pressure pickups, and further determines that in measurement pipe
Flow direction and flow.
When measured medium flows to third pressure point C by the first pressure point A in measurement pipe 3, the first differential pressure pickup 9 measures
Pressure differential Δ Pa be more than the second differential pressure pickup 10 measure pressure differential Δ Pb, determine therefrom that measured medium by the first pressure point
A is flowed to third pressure point C.Signal sampling and processing unit 8 passes through formula (1) using pressure differential Δ Pa as pressure differential Δ P
Calculate the volume flow q in the measurement pipev, the mass flow q in the measurement pipe is calculated by formula (2)m。
When measured medium flows to the first pressure point A by third pressure point C in measurement pipe 3, the first differential pressure pickup 9 measures
Pressure differential Δ Pa be less than the second differential pressure pickup 10 measure pressure differential Δ Pb, determine therefrom that measured medium by third pressure point
C is flowed to the first pressure point A.Signal sampling and processing unit 8 passes through formula (1) using pressure differential Δ Pb as pressure differential Δ P
Calculate the volume flow q in the measurement pipev, the mass flow q in the measurement pipe is calculated by formula (2)m。
Each embodiment of the utility model is described above, above description is exemplary, and non-exclusive, and
And it is also not necessarily limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for
Many modifications and changes will be apparent from for those skilled in the art.
Claims (10)
1. a kind of bidirectional traffics measuring device, which is characterized in that including measurement pipe, throttling element, support element and signal acquisition and place
Unit is managed, wherein：
The throttling element is fixed on by the support element in the measurement pipe, and coaxial with the measurement pipe, the throttling element
First end and second end including elliposoidal and the equal diameter section between the first end and second end, the equal diameter
Annular fluid passage is formed between section and the inner wall of the measurement pipe；
The apex of the first end of the throttling element is equipped with the first pressure point, straight in the outer surface of the equal diameter section, described etc.
The center position of the axial direction of diameter section is equipped with the second pressure point, and the apex of the second end is equipped with third pressure point；
The Signal sampling and processing unit is connected with the first pressure point, the second pressure point and third pressure point respectively,
And the flowing side in the measurement pipe is determined according to the pressure signal of the first pressure point, the second pressure point and third pressure point
To and flow.
2. bidirectional traffics measuring device according to claim 1, which is characterized in that the equal diameter section of the throttling element and institute
It is rounding off connection to state between first end and second end.
3. bidirectional traffics measuring device according to claim 1, which is characterized in that the Signal sampling and processing unit packet
First pressure sensor, second pressure sensor and third pressure sensor are included, the first pressure sensor, second pressure pass
Sensor and third pressure sensor are connected by pressure guiding pipe with the first pressure point, the second pressure point and third pressure point respectively
It connects.
4. bidirectional traffics measuring device according to claim 1, which is characterized in that the Signal sampling and processing unit packet
Include the first differential pressure pickup and the second differential pressure pickup, the high voltage interface of first differential pressure pickup and the first pressure point
It is connected, the high voltage interface of second differential pressure pickup is connected with the third pressure point, first differential pressure pickup
It is connected respectively with the second pressure point with the low-voltage interface of the second differential pressure pickup.
5. bidirectional traffics measuring device according to claim 1, which is characterized in that the support element includes first group of support
Part and second group of support element, first group of support element be connected to the throttling element first end and the measurement pipe inner wall it
Between, including multiple first support chips of the periphery of the first end are uniformly distributed in, second group of support element is connected to described
Between the second end of throttling element and the inner wall of the measurement pipe, including be uniformly distributed in the second end periphery multiple second
Support chip.
6. bidirectional traffics measuring device according to claim 5, which is characterized in that first support chip and the second support
Piece is aerofoil profile, and the angle between the plane where first support chip and the axis of the measurement pipe is equal to described second
Angle between support chip and the plane.
7. bidirectional traffics measuring device according to claim 1, which is characterized in that the both ends of the measurement pipe are equipped with method
It is blue.
8. bidirectional traffics measuring device according to claim 1, which is characterized in that on the tube wall of the measurement pipe along
Axial direction is equipped with the first pressure port, the second pressure port and third pressure port successively, wherein first pressure port and described the
One pressure point alignment, second pressure port and the second pressure point alignment, the third pressure port and the third pressure
Point alignment.
9. bidirectional traffics measuring device according to claim 8, which is characterized in that further include being each passed through described first to take
Press hole, the second pressure port and third pressure port the first pressure guiding pipe, the second pressure guiding pipe, third pressure guiding pipe, and first impulse
It is equipped with control valve on pipe, the second pressure guiding pipe, third pressure guiding pipe.
10. bidirectional traffics measuring device according to claim 1, which is characterized in that the first end of the throttling element and the
The outer profile at two ends is identical.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721732793.1U CN207610736U (en) | 2017-12-13 | 2017-12-13 | Bidirectional traffics measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721732793.1U CN207610736U (en) | 2017-12-13 | 2017-12-13 | Bidirectional traffics measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806912A (en) * | 2017-12-13 | 2018-03-16 | 南京亿准纳自动化控制技术有限公司 | Bidirectional traffics measurement apparatus |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806912A (en) * | 2017-12-13 | 2018-03-16 | 南京亿准纳自动化控制技术有限公司 | Bidirectional traffics measurement apparatus |
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