CN205782024U - A kind of pipeline stream mode monitoring device - Google Patents

Abstract

This utility model relates to a kind of pipeline stream mode monitoring device, belongs to fluid inspection field.Through gusset equipped with turbulent and inner core on inner-walls of duct, inner core is separated into left chamber and right chamber by inner core dividing plate；Left intracavity equipped with left end cap, left end cap is provided with pressure and temperature sensor equipped with the circuit board of band transmitter unit, end；Bearing pin is divided into left and right semiaxis by the bearing pin shaft shoulder, and left and right semiaxis is cased with buffer spring and balancing spring respectively；Left half axle stretches out through left end cap centre bore, end is equipped with activator；Right axle shaft pilot hole on dividing plate enters right chamber and equipped with piezoelectric vibrator, and in each piezoelectric vibrator outer rim, ring frame quality is different.Advantage characteristic: utilize turbulent and activator to generate electricity with fluid coupling, the real time on-line monitoring of real meaning can be realized；Monitoring device configures along pipe lengths, and simple in construction, radial dimension are little, be prone to improve generated energy and bandwidth by many piezoelectric vibrators synchronous working；Piezoelectric vibrator is rational in infrastructure, energy conversion efficiency is high, generated energy is big.

Description

A kind of pipeline stream mode monitoring device

Technical field

This utility model belongs to fluid flow state monitoring technical field, is specifically related to a kind of pipeline stream mode monitoring dress Put.

Background technology

Due to streams such as the petroleum and natural gases that the reasons such as spontaneous corrosion, nature act of god and artificial pilferage are caused 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, the most also cause serious pollution to its periphery natural environment.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 also 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 at present China's long distance pipeline anti-theft monitoring system The application of system is also in the elementary step, not yet obtain large-area popularization and application, and its one of the main reasons is the confession of monitoring system Electricity problem fails to be well solved: 1) uses the method cost laying cable high and is 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 relevant 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 occasion that pipe diameter is less, and the TRT of some structure there is also the phenomenons such as electromagnetic interference, Popularization and application receive certain restriction.Therefore, for making petroleum and natural gas pipe leakage and burglary-resisting system be used practically, Need to first solve its powerup issue.

Summary of the invention

Power the problem existing for aspect for existing pipeline fluid condition monitoring system, the utility model proposes a kind of pipe Road stream mode monitoring device.This utility model adopted implementation scheme is that and is fixed with turbulent, warp through gusset one on inner-walls of duct Gusset two is fixed with inner core, and turbulent axis is vertical with conduit axis, pipeline, through the fixing turbulent of gusset one and through gusset two Fixing inner core collectively forms 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；Every Plate is provided with pilot hole and cable hole；Left intracavity is fixed with the circuit board of band transmitter unit through screw, and end, left chamber is pacified through screw Equipped with left end cap, left end cap is provided with pressure transducer and temperature sensor；Bearing pin is divided into left half axle and the right side by the bearing pin shaft shoulder Buffer spring and balancing spring it is cased with respectively on semiaxis, left half axle and right axle shaft；Left half axle is stretched from left chamber through left end cap centre bore Going out, left half axle end is provided with activator through nut；Right axle shaft pilot hole on dividing plate extend into right intracavity, warp on right axle shaft Nut is provided with circular piezoelectric vibrator, and piezoelectric vibrator is formed by metal basal board and piezoelectric chip are bonding；Piezoelectric vibrator is with adjacent It is provided with between right axle shaft pillow block or nut between cushion, two adjacent piezoelectric vibrators and elastomeric isolation set is installed；Each piezoelectricity shakes The quality of the ring frame installed through screw in sub-outer rim is different；Between each piezoelectric vibrator after wire is parallel with one another again with circuit Plate connects, and parallel connection refers to be connected with each other through wire between each piezoelectric chip, be connected with each other through wire between each metal basal board.

During work, when having fluid to flow through turbulent, between fluid and turbulent, generation is interacted.In some condition Under, the whirlpool that alternately can come off on the contrary and periodically in turbulent two row direction of rotation formed behind when fluid flows through turbulent, Alternately coming off of whirlpool can cause the alternate of the fluid pressure between turbulent and activator, so that before and after activator two The fluid pressure differential of side alternately changes, and it is of reciprocating vibration that the fluid pressure of alternate makes activator produce left and right.For this reality With novel, the left and right of activator is of reciprocating vibration drives piezoelectric vibrator to vibrate and produce flexural deformation through bearing pin, thus by mechanical energy It is converted into electric energy；Generated electricity is changed and storage circuit, for pressure transducer, temperature through the energy of wire transmission to circuit board Sensor and signal transmitter unit are powered；The status signals such as fluid pressure, flow and temperature are launched by transmitter unit.

In this utility model, in road, fluid actual flow velocity is by the generation voltage waveform quantity table of piezoelectric vibrator in the unit interval Levy, i.e. v=f_lD/S_t, S in formula_tFor the coefficient relevant to structure and fluid, f_lFrequency of vibration caused by fluid, i.e. unit The voltage wave figurate number generated in time, D=(200～5000) μ/(ρ v₀) it is the diameter of turbulent, ρ is fluid density, and μ is Fluid kinematic viscosity, v₀The nominal flow rate of fluid.

In this utility model, for improving piezoelectric vibrator generating capacity, metal basal board is the beryllium-bronze of 0.2mm thickness, piezoelectricity Wafer is the PZT4 of thickness 0.3mm；Metal basal board effective radius R_mGive timing, rational piezoelectric chip radius R_pBy piezoelectric vibrator Energy meter formulaDerivative try to achieve, i.e. byTrying to achieve, in formula, δ is sharp Encourage the piezoelectric vibrator central point deflection caused by device vibration, K_pFor piezoelectric vibrator rigidity, and

$K_p=\frac{1.9237(1+0.4242\frac{R_p^2}{R_m^2})(1-\frac{R_p^2}{R_m^2})}{1.7249R_p^2\{(0.5082\frac{R_p^2}{R_m^2}-1)(1+0.1789\frac{R_p^2}{R_m^2})+1.2196\ln \left(\frac{R_p}{R_m}\right)(1-\frac{R_p^2}{R_m^2})\[1-0.675ln\left(\frac{R_p}{R_m}\right)\]\}+R_m^2}.$

Advantage and characteristic: 1) utilize turbulent and activator to generate electricity with the coupling of fluid and to realize fluid state automatic Measure, it is not necessary to outside energy supply, without electromagnetic interference, the real time on-line monitoring of real meaning can be realized；2) monitoring device is along pipe The configuration of road length direction, simple in construction, radial dimension are little, be prone to by multiple piezoelectric vibrators synchronizations with different additional mass Work improves generated energy and effective bandwidth；3) piezoelectric vibrator is rational in infrastructure, energy conversion efficiency is high, generated energy is big.

Accompanying drawing explanation

Fig. 1 is the structural representation of monitoring device in one preferred embodiment of this utility model；

Fig. 2 is the left view of Fig. 1；

Fig. 3 is the I portion enlarged drawing of Fig. 1；

Fig. 4 is the structural representation of main body frame in one preferred embodiment of this utility model；

Fig. 5 is that in one preferred embodiment of this utility model, piezoelectric vibrator generated energy is bent with the relation of piezoelectric chip radius Line.

Detailed description of the invention

It is fixed with turbulent q through gusset one b1, is fixed with inner core c through gusset two b2 on the inwall of pipeline a, turbulent q's Axis is vertical with the axis of pipeline a, pipeline a, through turbulent q fixing for gusset one b1 and through inner core c fixing for gusset two b2 altogether With constituting main body frame K；It is provided with dividing plate c2, dividing plate c2 inside the barrel c1 of inner core c and inner core c is separated into left chamber c3 and right chamber c4；Dividing plate c2 is provided with pilot hole c5 and cable hole c6；It is fixed with the circuit board d of band transmitter unit P through screw in left chamber c3, left C3 end, chamber is provided with left end cap k through screw, and left end cap k is provided with pressure transducer S1 and temperature sensor S2；On bearing pin m The shaft shoulder ml bearing pin m is divided on left half axle m2 and right axle shaft m3, left half axle m2 and right axle shaft m3 and is cased with buffer spring j1 respectively With balancing spring j2；Left half axle m2 stretches out from left chamber c3 through the centre bore of left end cap k, and left half axle m2 end is provided with sharp through nut Encourage device n；Right axle shaft m3 pilot hole c5 on dividing plate c2 extend in right chamber c4, and right axle shaft m3 is provided with circular pressure through nut Electric tachometer indicator h, piezoelectric vibrator h are by metal basal board h1 and piezoelectric chip h2 is bonding forms；Piezoelectric vibrator h is with adjacent right axle shaft m3's It is provided with between pillow block or nut between cushion e, two adjacent piezoelectric vibrator h and elastomeric isolation set f is installed；Each piezoelectric vibrator h The quality of ring frame M1, M2 and M3 of being installed through screw in outer rim is different；Between each piezoelectric vibrator h after wire is parallel with one another Be connected with circuit board d again, parallel connection refers to be connected with each other through wire between each piezoelectric chip h2, between each metal basal board h1 through wire It is connected with each other.

During work, when having fluid to flow through turbulent q, between fluid and turbulent q, generation is interacted.At some Under part, alternately can come off on the contrary and periodically in turbulent q two row direction of rotation formed behind when fluid flows through turbulent q Whirlpool, alternately coming off of whirlpool can cause the alternate of the fluid pressure between turbulent q and activator n, so that excitation Before and after device n, the fluid pressure differential of both sides alternately changes, and the fluid pressure of alternate makes back and forth to shake about activator n generation Dynamic.For this utility model, the left and right of activator n is of reciprocating vibration to be driven piezoelectric vibrator h to vibrate through bearing pin m and produces bending change Shape, thus convert mechanical energy into electric energy；Generated electricity is changed and storage circuit through the energy of wire transmission to circuit board d, Power for pressure transducer S1, temperature sensor S2 and signal transmitter unit P；Transmitter unit P is by fluid pressure, flow and temperature Launch Deng status signal.

In this utility model, in road, the actual flow velocity of fluid is by the generation voltage waveform quantity of piezoelectric vibrator in the unit interval Characterize, i.e. v=f_l, D/S_t, S in formula_tFor the coefficient relevant to structure and fluid, f_lFrequency of vibration caused by fluid, the most single The voltage wave figurate number generated in bit time, D=(200～5000) μ/(ρ v₀) it is the diameter of turbulent, ρ is fluid density, μ For fluid kinematic viscosity, v₀The nominal flow rate of fluid.

In this utility model, for improve piezoelectric vibrator h generating capacity, metal basal board h1 be 0.2mm thickness beryllium-bronze, Piezoelectric chip h2 is the PZT4 of thickness 0.3mm；The effective radius R of metal basal board h1_mGive timing, the half of rational piezoelectric chip h2 Footpath R_pBy the energy meter formula of piezoelectric vibrator hDerivative try to achieve, i.e. byTrying to achieve, in formula, δ is the deflection of the piezoelectric vibrator h central point caused by activator n vibration, K_pShake for piezoelectricity The rigidity of sub-h, and

$K_p=\frac{1.9237(1+0.4242\frac{R_p^2}{R_m^2})(1-\frac{R_p^2}{R_m^2})}{1.7249R_p^2\{(0.5082\frac{R_p^2}{R_m^2}-1)(1+0.1789\frac{R_p^2}{R_m^2})+1.2196\ln \left(\frac{R_p}{R_m}\right)(1-\frac{R_p^2}{R_m^2})\[1-0.675ln\left(\frac{R_p}{R_m}\right)\]\}+R_m^2}.$

Obviously, this utility model utilizes turbulent and activator generate electricity with the coupling of fluid and realize fluid state certainly Dynamic measure and launch, it is not necessary to outside energy supply, without electromagnetic interference, the real time on-line monitoring of real meaning can be realized；Monitoring dress Putting and configure along pipe lengths, simple in construction, radial dimension are little, be prone to be shaken by multiple piezoelectricity with different additional mass Son synchronous working improves generated energy and effective bandwidth；Piezoelectric vibrator is rational in infrastructure, energy conversion efficiency is high, generated energy is big.

Claims (1)

1. a pipeline stream mode monitoring device, it is characterised in that: it is fixed with turbulent through gusset one on inner-walls of duct, through gusset Two are fixed with inner core, and turbulent axis is vertical with conduit axis；Inner core is separated by the inner core dividing plate being provided with pilot hole and cable hole Become left chamber and right chamber；Left intracavity is fixed with the circuit board of band transmitter unit through screw, end is provided with left end cap, left end through screw Cover and pressure and temperature sensor is installed；Bearing pin is divided on left half axle and right axle shaft, left half axle and right axle shaft by the bearing pin shaft shoulder It is cased with buffer spring and balancing spring respectively；Left half axle stretches out from left chamber through left end cap centre bore, and left half axle end is pacified through nut Equipped with activator；Right axle shaft pilot hole on dividing plate extend into right intracavity, right axle shaft is provided with circular piezoelectric through nut and shakes Son, piezoelectric vibrator is formed by metal basal board and piezoelectric chip are bonding；Between piezoelectric vibrator and adjacent right axle shaft pillow block or nut Cushion is installed, between two adjacent piezoelectric vibrators, elastomeric isolation set is installed；Installed through screw in each piezoelectric vibrator outer rim The quality of ring frame different.