CN205679633U - A kind of intelligent pipeline flow monitoring instrument - Google Patents

Abstract

The utility model relates to a kind of intelligent pipeline flow monitoring instrument, belongs to fluid inspection field.The inner core of pipeline is divided into chamber, left and right by dividing plate, left chamber built with circuit board, end equipped with left end cap；Be cased with buffer spring and balancing spring respectively on the semiaxis of bearing pin left and right, left half axle through left end cap stretch out, end is provided with driver, right axle shaft stretches into right chamber from dividing plate；Right end cap is crimped on two housings and at least one inside casing in right chamber；All be crimped with metal substrate between adjacent interior housing and inside casing, the cantilever beam of metal substrate bonding with piezoelectric chip become piezoelectric vibrator, the cantilever beam other end is fixed on right axle shaft；Housing side and inside casing both sides are designed with confined planes and deep gouge.Advantage characteristic: utilize coupling synchronization to realize generating and flow velocity measurement, the flow velocity on-line monitoring of real meaning can be realized；Monitor configures along pipe lengths, and simple in construction, radial dimension are little, easily obtain required energy by many piezoelectric vibrators；Piezoelectric vibrator is rational in infrastructure, and generated energy is big, reliability is high.

Description

A kind of intelligent pipeline flow monitoring instrument

Technical field

The utility model belongs to pipeline fluid monitoring technical field, is specifically related to a kind of intelligent pipeline 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 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 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 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.

Content of the invention

Power the problem existing for aspect for existing pipeline fluid condition monitoring system, the utility model proposes a kind of intelligence Can pipe flow speed monitor.The utility model adopted implementation scheme is that inner-walls of duct is fixed with inner core, pipeline, muscle through gusset Plate and inner core constitute 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；Set on dividing plate Have pilot hole and cable hole；In left chamber through screw be fixed with the circuit board with transmitter unit, end is provided with left end cap through screw； Bearing pin is divided into left half axle and right axle shaft by the bearing pin shaft shoulder, and left and right semiaxis is cased with buffer spring and balancing spring respectively；Left half axle Stretching out from left chamber through left end cap centre bore, left half axle end is provided with driver；Right axle shaft stretches into right chamber from the pilot hole of dividing plate, End, right chamber is provided with right end cap through screw, and right end cap is crimped on two housings and at least one inside casing in right chamber；Housing and It between adjacent inside casing and is all crimped with metal substrate between two adjacent inside casings, the metal cantilever beams on metal substrate The piezoelectric chip bonding with institute constitutes piezoelectric vibrator, and the other end of metal cantilever beams is fixed on through nut, short sleeve and long axle sleeve On right axle shaft；The both sides of the side of housing and inside casing are designed with shape yardstick and the identical confined planes of quantity and deep gouge；Deep gouge is used In accommodating piezoelectric chip, its planar dimension is more than piezoelectric chip, less than metal cantilever beams；Confined planes is used for limiting piezoelectric vibrator and becomes Shape amount, confined planes is arc surface and its rational radius of curvature depends on material and the thickness of metal substrate and piezoelectric chip；Respectively Between piezoelectric vibrator through wire parallel with one another after be connected with circuit board again, parallel connection refer between each piezoelectric chip through wire phase interconnection Connect, be connected with each other through wire between each metal substrate.

During work, when having fluid to flow through driver, between fluid and driver, generation is interacted.In some condition Under, the whirlpool that alternately can come off on the contrary and periodically in driver two row direction of rotation formed behind when 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 utility model, driver left and right is of reciprocating vibration through bearing pin Force piezoelectric vibrator to produce flexural deformation, thus convert mechanical energy into electric energy；Generated electricity through wire transmission to circuit board Energy conversion with storage circuit, power for signal transmitter unit；Meanwhile, the quantity of the voltage waveform that piezoelectric vibrator is generated is also Being extracted, being used for characterizing rate of flow of fluid, rate of flow of fluid signal is launched unit and launches.

In the utility model, for making piezoelectric vibrator effectively to be encouraged, should meet when monitor works under nominal flow rate: Fluid force F suffered by bearing pin_lEqual to suffered equilibrium bomb spring force F_pWith buffering elastic spring force F_hDifference, i.e. F_l=F_p-F_h, piezoelectric vibrator Quiet deflection is zero and driver a diameter of D=(200～5000) μ/(ρ v₀), in formula D be the diameter of driver, ρ be fluid Density, μ are fluid kinematic viscosity, v₀For pipeline nominal flow rate.

In the utility model, the flow velocity of fluids within pipes is by the generation voltage waveform quantity table of piezoelectric vibrator in the unit interval Levy, be v=f_lD/S_t, S in formula_tFor the coefficient related to structure and fluid property, D is driver diameter, f_lFlow through for fluid Vibration frequency caused during driver, the voltage wave figurate number being generated in the unit interval.

In the utility model, for improving piezoelectric vibrator generating capacity and reliability, piezoelectric chip is 0.2～0.3mm's PZT4, metal substrate are beryllium-bronze, and metal substrate is 1～2.5 with the thickness ratio of piezoelectric chip, now the generating energy of piezoelectric vibrator Power compared with strong, energy comparison is big；Energy than refer to variant thickness than the produced electric energy of piezoelectric vibrator first order buckling deformation with Maximum therein bigger；PZT4 and the piezoelectric vibrator of beryllium-bronze substrate composition, confined planes are utilized for the utility model Reasonable radius of curvature beWherein α=h_m/h_pFor thickness ratio, h_mAnd h_p It is respectively metal substrate and piezoelectric chip thickness.

Advantage and characteristic: utilize driver to realize that generating power supply and flow velocity are measured automatically with the coupling synchronization of fluid, Without outside energy supply and sensor, without electromagnetic interference, the flow velocity real time on-line monitoring of real meaning can be realized；Monitor edge Pipe lengths configures, and simple in construction, radial dimension are little, it is easy to obtain required energy by using many piezoelectric vibrators；Piezoelectricity Oscillator structure is rationally, deflection is restricted by confined planes and each point Deformation Curvature is equal, therefore generated energy is big, reliability is high.

Brief description

Fig. 1 is the structural representation of monitor in one preferred embodiment of the 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 A-A sectional view of Fig. 1；

Fig. 5 is the structural representation of main body frame in one preferred embodiment of the utility model；

Fig. 6 is the structural representation of housing in one preferred embodiment of the utility model；

Fig. 7 is the right view of Fig. 6；

Fig. 8 is the structural representation of inside casing in one preferred embodiment of the utility model；

Fig. 9 is the right view of Fig. 8.

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；In left chamber c3 through screw be fixed with the circuit board d with transmitter unit P, end is provided with left end cap k through screw； Shaft shoulder m1 on bearing pin m bearing pin m is divided on left half axle m2 and right axle shaft m3, left half axle m2 and right axle shaft m3 be cased with respectively buffering Spring j1 and 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 Encourage device n；Pilot hole c5 from dividing plate c2 for the right axle shaft m3 stretches into right chamber c4, and the end of right chamber c4 is provided with right end cap g through screw, Right end cap g is crimped on two housing e and at least one inside casing f in right chamber c4；Between housing e and adjacent inside casing f and two It is all crimped with metal substrate h1, the piezoelectricity bonding with institute of the metal cantilever beams h11 on metal substrate h1 between individual adjacent inside casing f Wafer h2 constitutes piezoelectric vibrator h, and the other end of metal cantilever beams h11 is fixed on right half through nut p, short sleeve i ' and long axle sleeve i On axle m3；The both sides of the side of housing e and inside casing f are designed with shape yardstick and the identical confined planes M of quantity and deep gouge C；Deep gouge C For accommodating piezoelectric chip h2, its planar dimension is more than piezoelectric chip h2, less than metal cantilever beams h11；Confined planes M is used for limiting The deflection of piezoelectric vibrator h, confined planes M is arc surface and its rational radius of curvature depends on metal substrate h1 and piezoelectric chip The material of h2 and thickness；Between each piezoelectric vibrator h through wire parallel with one another after be connected with circuit board d again, parallel connection refers to each piezoelectricity It is connected with each other through wire, is connected with each other through wire between each metal substrate h1 between wafer 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 utility model, the left and right of driver n back and forth shakes Move and force piezoelectric vibrator h to produce flexural deformation through bearing pin m, thus convert mechanical energy into electric energy；Generated electricity passes through wire It is passed to energy conversion and the storage circuit of circuit board d, be that signal transmitter unit P powers；Meanwhile, the electricity that piezoelectric vibrator h is generated The quantity of corrugating is also extracted, and is used for characterizing rate of flow of fluid, and rate of flow of fluid signal is launched unit P and launches.

In the utility model, for making piezoelectric vibrator h effectively to be encouraged, monitor is in nominal flow rate v₀Should expire during lower work Foot: fluid force F suffered by bearing pin m_lEqual to suffered equilibrium bomb spring force F_pWith buffering elastic spring force F_hDifference, i.e. F_l=F_p-F_h, piezoelectricity The quiet deflection of oscillator h is zero and a diameter of D=of driver n (200～5000) μ/(ρ v₀), in formula, D is the straight of driver Footpath, ρ be fluid density, μ be fluid kinematic viscosity.

In the utility model, the flow velocity of fluids within pipes is by the generation voltage waveform quantity table of piezoelectric vibrator in the unit interval Levy, be v=f_lD/S_t, S in formula_tFor the coefficient related to structure and fluid property, D is driver diameter, f_lFlow through for fluid Vibration frequency caused during driver, the voltage wave figurate number being generated in the unit interval.

In the utility model, for improving generating capacity and the reliability of piezoelectric vibrator h, piezoelectric chip h2 is 0.2～0.3mm PZT4, metal substrate h1 be beryllium-bronze, the ratio of the thickness of metal substrate h1 and piezoelectric chip h2 is 1～2.5, and now piezoelectricity shakes The generating capacity of sub-h compared with strong, energy comparison is big；Energy than refer to variant thickness than piezoelectric vibrator h first order buckling deformation institute The electric energy producing is bigger with maximum therein；PZT4 and the piezoelectricity of beryllium-bronze substrate composition are utilized for the utility model The reasonable radius of curvature of oscillator h, confined planes M isWherein α=h_m/h_pFor Thickness ratio, h_mAnd h_pIt is respectively the thickness of metal substrate h1 and piezoelectric chip h2.

Obviously, the utility model is to utilize driver generate electricity with the coupling of fluid and realize that flow velocity is measured automatically, nothing Need outside energy supply and sensor, without electromagnetic interference, the flow velocity real time on-line monitoring of real meaning can be realized；Monitor is along pipe Road length direction configuration, simple in construction, radial dimension are little, it is easy to obtain required energy by using many piezoelectric vibrators；Piezoelectricity shakes Minor structure is rationally, deflection is restricted by confined planes and each point Deformation Curvature is equal, therefore generated energy is big, reliability is high.

Claims (1)

1. an intelligent pipeline flow monitoring instrument, it is characterised in that: inner-walls of duct is fixed with inner core through gusset, be provided with pilot hole and Inner core is separated into left chamber and right chamber by the dividing plate in cable hole；It is provided with circuit board, the end peace of transmitter unit inside left chamber Equipped with left end cap；Bearing pin is divided into left half axle and right axle shaft by the bearing pin shaft shoulder, and left and right semiaxis is cased with buffer spring and balance respectively Spring；Left half axle through left end cap centre bore stretch out from left chamber, end is provided with driver；Right axle shaft stretches into the right side from dividing plate pilot hole Chamber, end, right chamber is provided with right end cap, and right end cap is crimped on two housings and at least one inside casing in right chamber；Housing and adjacent Inside casing between and two adjacent inside casings between be all crimped with metal substrate, the metal cantilever beams on metal substrate is bonding with institute Piezoelectric chip constitute piezoelectric vibrator, the other end of metal cantilever beams is fixed on right axle shaft；Housing side and inside casing both sides are all Be provided with shape yardstick and the identical confined planes of quantity and deep gouge, deep gouge planar dimension more than piezoelectric chip, be less than metal cantilever beams, Confined planes is arc surface.