CN106443054A - Pipe flow velocity monitor - Google Patents
Pipe flow velocity monitor Download PDFInfo
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- CN106443054A CN106443054A CN201610459485.XA CN201610459485A CN106443054A CN 106443054 A CN106443054 A CN 106443054A CN 201610459485 A CN201610459485 A CN 201610459485A CN 106443054 A CN106443054 A CN 106443054A
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- piezoelectric vibrator
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- flow velocity
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- 239000012530 fluid Substances 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000012528 membrane Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 230000002463 transducing effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/08—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
- G01P5/086—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect by using special arrangements and constructions for measuring the dynamo-electric effect
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to a pipe flow velocity monitor which belongs to the field of fluid monitoring. The inner wall of the pipe is provided with an inner cylinder through a rib plate. The left chamber of the inner cylinder is provided a circuit board, and an end is provided with a left end cap. A left end rod, which is provided with an exciter, of a force applying rod extends out of the left end cap. A right end rod, which is sleeved by a balancing spring, of the force applying rod is arranged in a guiding hole on a baffle board, and furthermore the end of the right end rod is provided with a buffer pad. A transducer which is composed of a slide carriage and a piezoelectric vibrator is sleeved in a right chamber. The piezoelectric vibrator is obtained through binding a metal substrate and a piezoelectric wafer. An insulating pad is arranged between the adjacent piezoelectric vibrators of two transducers. The piezoelectric vibrators at two ends of the right chamber respectively contact with buffer pads on the right end rod and a right end cap. The pipe flow velocity monitor is advantageous in that a coupling function between the exciter and fluid is utilized for generating electric power and automatic measurement for the flow velocity is realized, and real-time flow velocity monitoring in the true sense can be realized; the components are configured along the length direction of the pipe, thereby realizing simple structure, small radial size, and easy required energy acquisition through multiple transducers; and the piezoelectric vibrator has advantages of reasonable structure, self-protecting function, high power generation amount and high reliability.
Description
Technical field
The invention belongs to fluid flow state monitoring technical field, be specifically related to a kind of pipeline stream flow monitoring instrument.
Background technology
Flow by the petroleum and natural gas that the reasons such as spontaneous corrosion, nature force majeure and artificial pilferage are caused etc.
Body long distance pipeline happens occasionally in the incident of leakage of the process of use, and pipe leakage not only causes huge economic damage frequently
Lose, also cause serious pollution to its periphery natural environment simultaneously.In the past, the method frequently with regular manual inspection was tieed up
Protect, but because oil and gas pipes lays distance and is often in uninhabited or part of having inconvenient traffic, regular visit is difficult to find in time
Leakage is simultaneously safeguarded.Therefore, there has been proposed polytype for line leakage or burglary-resisting system.Although being proposed
Some pipe leakage or anti-theft monitoring alarm method at technological layer with more ripe, but long distance pipeline anti-theft monitoring system of current China
The application of system is also in elementary step, the long-pending popularization and application not yet obtaining big face, and its one of the main reasons is the confession of monitoring system
Electricity problem fails to be well solved：1) use the method cost laying cable high and easily cut off by lawless person and affect prison
Examining system properly functioning；2) using battery to use limited time when powering, need to often change, once battery electric quantity is not enough and not
Also the remote transmission of monitoring information cannot be completed when changing in time；3) in recent years, for meeting related wireless sensing monitoring system
Self-powered demand, people also proposed the turbine type microminiature TRT of various ways, the problem of its maximum be structure complicated,
Volume is relatively large, is unsuitable for the less occasion of pipe diameter, and the TRT of some structure there is also the phenomenons such as electromagnetic interference,
Popularization and application have received certain restriction.Therefore, for making petroleum and natural gas pipe leakage and burglary-resisting system be used practically,
Still need to first solve its powerup issue.
Content of the invention
Powering the problem existing for aspect for existing pipeline fluid condition monitoring system, the present invention proposes a kind of pipeline stream
Flow monitoring instrument.The embodiment that the present invention uses is：Inner-walls of duct is fixed with inner core, pipeline, gusset and inner core structure through gusset
Become main body frame；Being provided with dividing plate inside inner core barrel, inner core is separated into left chamber and right chamber by dividing plate；Dividing plate be provided with pilot hole and
Cable hole；Being fixed with the circuit board with transmitter unit through screw in left chamber, end, left chamber is provided with left end cap through screw；Force application rod
On the shaft shoulder force application rod is divided into left end bar and right-hand member bar；Left end bar stretches out left chamber, left end boom end warp through left end cap centre bore
Nut is provided with driver；Being cased with balancing spring on right-hand member bar, right-hand member bar is placed in the pilot hole on dividing plate, and right-hand member boom end fills
There is cushion pad；Right cavity inner sleeve has transducer, and the piezoelectric vibrator that transducer is installed by balladeur train and balladeur train toroidal membrane both sides is constituted,
Piezoelectric vibrator is connected with the toroidal membrane of balladeur train through screw；Piezoelectric vibrator is formed by metal substrate and piezoelectric chip bonding；One
In transducer two piezoelectric vibrators metal substrate near install, be provided with between the adj acent piezoelectric oscillator of two adjacent transducer every
From pad；The piezoelectric vibrator at two ends, left and right, right chamber contacts with the cushion pad on right-hand member bar and right end cap respectively；Each piezoelectric vibrator it
Between through wire parallel with one another after be connected with circuit board again, parallel connection refer between each piezoelectric chip through wire be connected with each other, each metal
It is connected with each other through wire between substrate.
During work, when having fluid to flow through driver, between fluid and driver, generation is interacted.In some condition
The whirlpool that alternately can come off on the contrary and periodically in driver two row direction of rotation formed behind when lower fluid flows through driver,
Alternately coming off of whirlpool can cause the alternately change of fluid pressure, even if the fluid pressure differential of both sides alternately becomes before and after driver
Change, so that driver produces the of reciprocating vibration of left and right directions.For the present invention, the left and right of driver is of reciprocating vibration through force
Bar, cushion pad and isolating pad force piezoelectric vibrator to produce flexural deformation, thus convert mechanical energy into electric energy；Generated electricity warp
Wire transmission is changed and storage circuit to the energy of circuit board, powers for signal transmitter unit；Meanwhile, piezoelectric vibrator is generated
The quantity of voltage waveform is also extracted, and is used for characterizing rate of flow of fluid signal, and rate of flow of fluid signal is launched unit and launches
Go.
In the present invention, for making piezoelectric vibrator effectively to be encouraged, should meet when monitor works under nominal flow rate：Piezoelectricity
Exciting force F suffered by oscillatorpEqual to fluid force F suffered by force application rodlWith equilibrium bomb spring force FsDifference, i.e. Fp=Fl-Fs, piezoelectricity shakes
The quiet deflection of subcenter is the half of its deflection allowable, and driver a diameter of D=(200～5000) μ/(ρ v0), in formula
D be the diameter of driver, ρ be fluid density, μ be fluid kinematic viscosity, v0For nominal flow rate.
In the present invention, the flow velocity of fluids within pipes is characterized by the generation voltage waveform quantity of piezoelectric vibrator in the unit interval,
It is v=flD/Si, S in formulaiFor the coefficient related to structure and fluid, D is driver diameter, flFlow through driver for fluid
When caused vibration frequency, the voltage wave figurate number being generated in the unit interval.
In the present invention, for improving the generating capacity of piezoelectric vibrator h, metal substrate is the beryllium-bronze of 0.2mm thickness, piezo crystals
Piece is the PZT4 of thickness 0.3mm；When the effective radius Rm of metal substrate gives, the radius R of rational piezoelectric chip 2pBy piezoelectricity
The energy meter formula of oscillatorDerivative try to achieve, i.e. byTry to achieve, δ in formula
For the piezoelectric vibrator center deformation amount that driver vibration is caused, KpFor piezoelectric vibrator rigidity, and
Advantage and characteristic：1) driver is utilized to generate electricity with the coupling of fluid and realize that flow velocity is measured automatically, it is not necessary to outer
The supply of boundary energy and sensor, without electromagnetic interference, the flow velocity real time on-line monitoring of real meaning can be realized；2) driver and transducing
Device configures along pipe lengths, and simple in construction, radial dimension are little, be easy to obtain required energy by using multi-transducer；3)
Piezoelectric vibrator is rational in infrastructure and under the conditions of being only operated in compression, therefore generated energy is big, reliability is high；4) transducer has self-insurance
Protective function, i.e. when exciting force reaches to a certain degree in transducer two metal substrates contact with each other, piezoelectric vibrator deflection not
It is further continued for increasing.
Brief description
Fig. 1 is the structural representation of monitor in a preferred embodiment of the present invention；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the structural representation of main body frame in a preferred embodiment of the present invention；
Fig. 4 is the structural representation of transducer in a preferred embodiment of the present invention；
Fig. 5 is the relation curve of piezoelectric vibrator generated energy and piezoelectric chip radius in a preferred embodiment of the present invention.
Detailed description of the invention
Being fixed with inner core c through gusset b on the inwall of pipeline a, pipeline a, gusset b and inner core c constitute main body frame K；Inner core c
Barrel c1 inside be provided with dividing plate c2, inner core c is separated into left chamber c3 and right chamber c4 by dividing plate c2；Dividing plate c2 is provided with pilot hole c5
With cable hole c6；Being fixed with the circuit board d with transmitter unit P through screw in left chamber c3, c3 end, left chamber is provided with a left side through screw
End cap k；Force application rod m is divided into left end bar m2 and right-hand member bar m3 by the shaft shoulder m1 on force application rod m；Left end bar m2 is through in left end cap k
Left chamber c3 is stretched out in heart hole, and left end bar m2 end is provided with driver n through nut p；It is cased with balancing spring j, right-hand member on right-hand member bar m3
Bar m3 is placed in the pilot hole c5 on dividing plate c2, and right-hand member bar m3 end is provided with cushion pad e；The two ends, left and right of balancing spring j are divided
Do not act against on the shaft shoulder m1 and dividing plate c2 of force application rod m；C4 end, right chamber is provided with right end cap g through screw, and right end cap g inlays
There is cushion pad e；It is cased with transducer H, the pressure that transducer H is installed by the toroidal membrane i1 both sides of balladeur train i and balladeur train i in right chamber c4
Electric tachometer indicator h is constituted, and piezoelectric vibrator h is connected with the toroidal membrane i1 of balladeur train i through screw；Piezoelectric vibrator h is by metal substrate h1 and pressure
Electricity wafer h2 bonding forms；In one transducer H, the metal substrate h1 of two piezoelectric vibrator h is near installation, two adjacent transducings
It is provided with isolating pad f between the adj acent piezoelectric oscillator h of device H；In right chamber c4 high order end and low order end piezoelectric vibrator h respectively with right-hand member bar
Cushion pad e on m3 and right end cap g contacts；Between each piezoelectric vibrator h through wire parallel with one another after be connected with circuit board d again,
Parallel connection refers to be connected with each other through wire, be connected with each other through wire between each metal substrate h1 between each piezoelectric chip h2.
During work, when having fluid to flow through driver n, between fluid and driver n, generation is interacted.At some
Can be at driver n two row direction of rotation formed behind whirlpool that is contrary and that periodically alternately come off when under part, fluid flows through driver n
Whirlpool, alternately coming off of whirlpool can cause the alternately change of fluid pressure, even if the fluid pressure differential of both sides replaces before and after driver n
Ground change, so that driver n produces the of reciprocating vibration of left and right directions.For the present invention, the left and right warp of reciprocating vibration of driver n
Force application rod m, cushion pad e and isolating pad f force piezoelectric vibrator h to produce flexural deformation, thus convert mechanical energy into electric energy；Given birth to
Become electric energy through the energy conversion of wire transmission to circuit board d and to store circuit, be that signal transmitter unit P powers；Meanwhile, piezoelectricity shakes
The quantity of the voltage waveform that sub-h is generated also is extracted, and is used for characterizing rate of flow of fluid signal, and rate of flow of fluid signal is launched
Unit P launches.
In the present invention, for making piezoelectric vibrator h effectively to be encouraged, should meet when monitor works under nominal flow rate：Pressure
Exciting force F suffered by electric tachometer indicator hpEqual to fluid force F suffered by force application rod mlWith equilibrium bomb spring force FsDifference, i.e. Fp=Fl-Fs, pressure
The quiet deflection at the center of electric tachometer indicator h is the half of its maximum allowable deflection, and driver n a diameter of D=(200～
5000)μ/(ρv0), in formula D be the diameter of driver, ρ be fluid density, μ be fluid kinematic viscosity, v0For nominal flow rate.
In the present invention, the flow velocity of fluids within pipes is characterized by the generation voltage waveform quantity of piezoelectric vibrator in the unit interval,
It is v=flD/Si, S in formulaiFor the coefficient related to structure and fluid, D is driver diameter, flFlow through driver for fluid
When caused vibration frequency, the voltage wave figurate number being generated in the unit interval.
In the present invention, for improving the generating capacity of piezoelectric vibrator h, metal substrate h1 is the beryllium-bronze of 0.2mm thickness, piezoelectricity
Wafer h2 is the PZT4 of thickness 0.3mm；When the effective radius Rm of metal substrate h1 gives, the radius R of rational piezoelectric chip h2p
By the energy meter formula of piezoelectric vibrator hDerivative try to achieve, i.e. byAsk
, in formula, δ is the deflection of the caused piezoelectric vibrator h central point of driver n vibration, KpFor the rigidity of piezoelectric vibrator h, and
Obviously, the present invention is to utilize driver generate electricity with the coupling of fluid and realize that flow velocity is measured automatically, it is not necessary to outer
The supply of boundary energy and sensor, without electromagnetic interference, the flow velocity real time on-line monitoring of real meaning can be realized；Driver and transducer
Along pipe lengths configuration, simple in construction, radial dimension are little, be easy to obtain required energy by using multi-transducer；Piezoelectricity
Oscillator structure is rationally and under the conditions of being only operated in compression, therefore generated energy is big, reliability is high；Transducer has self-protection function,
I.e. when exciting force reaches to a certain degree, in transducer, two metal substrates contact with each other, piezoelectric vibrator deflection does not continues to increase
Greatly.
Claims (1)
1. a pipeline stream flow monitoring instrument, it is characterised in that：Inner-walls of duct is fixed with inner core through gusset, be provided with inside inner core every
Plate, inner core is separated into left chamber and right chamber by dividing plate, and dividing plate is provided with pilot hole and cable hole；It is fixed with band through screw in left chamber to send out
Penetrating the circuit board of unit, end, left chamber is provided with left end cap through screw；The shaft shoulder on force application rod force application rod is divided into left end bar and
Right-hand member bar；Left end bar stretches out left chamber through left end cap centre bore, and left end boom end is provided with driver through nut；It is cased with on right-hand member bar
Balancing spring, right-hand member bar is placed in the pilot hole on dividing plate Nei and end equipped with cushion pad；Right cavity inner sleeve has transducer, transducer by
The piezoelectric vibrator that balladeur train and balladeur train toroidal membrane both sides are installed is constituted, and piezoelectric vibrator is by metal substrate and piezoelectric chip bonding
Become；In one transducer two piezoelectric vibrators metal substrate near install, the adj acent piezoelectric oscillator of two adjacent transducer it
Between be provided with isolating pad；In right chamber, the piezoelectric vibrator at two ends, left and right contacts with the cushion pad on right-hand member bar and right end cap respectively；Respectively
Between piezoelectric vibrator through wire parallel with one another after be connected with circuit board again；Under nominal flow rate, suffered by piezoelectric vibrator, exciting force is equal to
Fluid force suffered by force application rod is the one of its deflection allowable with difference, the quiet deflection at piezoelectric vibrator center of equilibrium bomb spring force
Halfth, driver a diameter of D=(200～5000) μ/(ρ v0), v in formula0For nominal flow rate, ρ be fluid density, μ be fluid dynamic
Viscosity；Measured flow velocity is v=flD/St, S in formulatFor the coefficient related to structure and fluid, flFlow through driver for fluid
When caused vibration frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610459485.XA CN106443054B (en) | 2016-06-15 | 2016-06-15 | Pipeline flow velocity monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610459485.XA CN106443054B (en) | 2016-06-15 | 2016-06-15 | Pipeline flow velocity monitor |
Publications (2)
| Publication Number | Publication Date |
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| CN106443054A true CN106443054A (en) | 2017-02-22 |
| CN106443054B CN106443054B (en) | 2020-03-31 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990260A (en) * | 2017-06-02 | 2017-07-28 | 江苏科技大学 | The tachymeter and measuring method of a kind of utilization vortex-induced vibration |
| CN107688100A (en) * | 2017-09-22 | 2018-02-13 | 上海交通大学 | A kind of pipeline stream flow monitoring self-powered sensor based on vortex-induced vibration |
| CN108169508A (en) * | 2017-12-22 | 2018-06-15 | 马鞍山市恒欣减压器制造有限公司 | A kind of pipeline fluid detection device |
| CN109771737A (en) * | 2019-03-01 | 2019-05-21 | 浙江师范大学 | A kind of Portable transfusion apparatus |
| CN109771739A (en) * | 2019-03-01 | 2019-05-21 | 浙江师范大学 | A kind of drug injector of piezoelectric patches driving |
| CN109812454A (en) * | 2019-03-01 | 2019-05-28 | 浙江师范大学 | A kind of self-powered is taken offence cylinder |
| CN109854567A (en) * | 2019-03-01 | 2019-06-07 | 浙江师范大学 | A kind of hydraulic unit driver |
| CN109882470A (en) * | 2019-03-01 | 2019-06-14 | 浙江师范大学 | A kind of step-by-step movement cylinder |
| CN109944779A (en) * | 2019-03-01 | 2019-06-28 | 浙江师范大学 | A kind of CUP water-cooling system circulating pump |
| CN109973364A (en) * | 2019-03-01 | 2019-07-05 | 浙江师范大学 | A kind of micro- cooling system liquid pump |
| CN110094330A (en) * | 2019-03-01 | 2019-08-06 | 浙江师范大学 | Self-driving type pneumatic device |
| CN110094384A (en) * | 2019-03-01 | 2019-08-06 | 浙江师范大学 | A kind of gas supply cylinder certainly |
| CN110836980A (en) * | 2018-08-15 | 2020-02-25 | 西卡西伯特博士及屈恩有限及两合公司 | Device and method for determining the flow velocity of a fluid in a hollow body |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990260A (en) * | 2017-06-02 | 2017-07-28 | 江苏科技大学 | The tachymeter and measuring method of a kind of utilization vortex-induced vibration |
| CN106990260B (en) * | 2017-06-02 | 2019-04-23 | 江苏科技大学 | A kind of tachymeter and measurement method using vortex-induced vibration |
| CN107688100A (en) * | 2017-09-22 | 2018-02-13 | 上海交通大学 | A kind of pipeline stream flow monitoring self-powered sensor based on vortex-induced vibration |
| CN108169508A (en) * | 2017-12-22 | 2018-06-15 | 马鞍山市恒欣减压器制造有限公司 | A kind of pipeline fluid detection device |
| CN110836980B (en) * | 2018-08-15 | 2021-12-07 | 西卡西伯特博士及屈恩有限及两合公司 | Device and method for determining the flow velocity of a fluid in a hollow body |
| CN110836980A (en) * | 2018-08-15 | 2020-02-25 | 西卡西伯特博士及屈恩有限及两合公司 | Device and method for determining the flow velocity of a fluid in a hollow body |
| CN109882470A (en) * | 2019-03-01 | 2019-06-14 | 浙江师范大学 | A kind of step-by-step movement cylinder |
| CN109854567A (en) * | 2019-03-01 | 2019-06-07 | 浙江师范大学 | A kind of hydraulic unit driver |
| CN109812454A (en) * | 2019-03-01 | 2019-05-28 | 浙江师范大学 | A kind of self-powered is taken offence cylinder |
| CN109944779A (en) * | 2019-03-01 | 2019-06-28 | 浙江师范大学 | A kind of CUP water-cooling system circulating pump |
| CN109973364A (en) * | 2019-03-01 | 2019-07-05 | 浙江师范大学 | A kind of micro- cooling system liquid pump |
| CN110094330A (en) * | 2019-03-01 | 2019-08-06 | 浙江师范大学 | Self-driving type pneumatic device |
| CN110094384A (en) * | 2019-03-01 | 2019-08-06 | 浙江师范大学 | A kind of gas supply cylinder certainly |
| CN109771739A (en) * | 2019-03-01 | 2019-05-21 | 浙江师范大学 | A kind of drug injector of piezoelectric patches driving |
| CN109854567B (en) * | 2019-03-01 | 2020-05-05 | 浙江师范大学 | Hydraulic driver |
| CN110094330B (en) * | 2019-03-01 | 2020-06-02 | 浙江师范大学 | Self-driving pneumatic device |
| CN109812454B (en) * | 2019-03-01 | 2020-06-23 | 浙江师范大学 | Self-driven cylinder |
| CN109944779B (en) * | 2019-03-01 | 2020-06-30 | 浙江师范大学 | Circulating pump of CPU water cooling system |
| CN109771737A (en) * | 2019-03-01 | 2019-05-21 | 浙江师范大学 | A kind of Portable transfusion apparatus |
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