CN205690087U - A kind of self-powered oil and gas pipes monitoring device - Google Patents

Abstract

This utility model relates to a kind of self-powered oil and gas pipes monitoring device, belongs to fluid inspection field.Through gusset one and two equipped with flow spoiler and inner core on inner-walls of duct, inner core two ends are equipped with end cap；Be inlaid with temperature and pressure sensor on left end cap, equipped with circuit board, multidiameter left half axle stretches out through left end cap, end equipped with activator, left half axle is cased with balancing spring and limit spring；The ∏ type framework that the piezoelectric vibrator bonding with piezoelectric chip by metal basal board is installed with its its end constitutes transducer；In inner core, the piezoelectric vibrator of the left and right sides is connected with the cushion pad on right axle shaft and right end cap respectively, and on two different transducers, adj acent piezoelectric oscillator is connected through isolating pad.Advantage characteristic: utilize fluid structure interaction to realize generating and flow velocity measurement, real flow velocity on-line monitoring 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, generated energy is big, reliability is high.

Description

A kind of self-powered oil and gas pipes monitoring device

Technical field

This utility model belongs to pipeline fluid monitoring technical field, is specifically related to a kind of self-powered oil and gas pipes 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, Still 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 from Power supply oil and gas pipes monitoring device.This utility model adopted implementation scheme is that on inner-walls of duct through gusset one and gusset two points The center not being provided with cylindrical flow spoiler and inner core, flow spoiler and inner core is mutually perpendicular to, and two ends, inner core left and right are respectively through screw Left end cap and right end cap are installed；Being inlaid with temperature sensor and pressure transducer on left end cap, left end cap is near the one of inner core Side is provided with the circuit board of transmitter unit through screw, and the left half axle of multidiameter stretches out from inner core through left end cap centre bore, left Half shaft end is provided with activator；Being cased with balancing spring and limit spring on left half axle, two ends, balancing spring left and right lean respectively On activator and left end cap, two ends, limit spring left and right act against left end cap and the side of multidiameter right axle shaft, the right side half respectively Axial end and right end cap side are all inlaid with cushion pad；On the metal basal board protruding with circular arc and metal basal board convex surface bonding Piezoelectric chip constitutes piezoelectric vibrator, two ∏ type framework structures that two piezoelectric vibrators and metal basal board two ends thereof are installed through screw Becoming transducer, in same transducer, the metal basal board of two piezoelectric vibrators is near installing, and transducer is placed in inner core and can be along interior Cylinder slides；In inner core, the leftmost side is connected with the cushion pad on right axle shaft and right end cap respectively with the piezoelectric vibrator of the rightmost side, two Piezoelectric vibrator adjacent on different transducers is connected through isolating pad；Limitting casing on two ∏ type frameworks in transducer during inoperative End contact with each other, to avoid piezoelectric chip fragmentation because suffered stress is excessive；Between each piezoelectric vibrator through wire the most also Be connected with circuit board again after connection, parallel connection refers to be connected with each other through wire between each piezoelectric chip, between each metal basal board through wire It is connected with each other.

During work, when having fluid to flow through flow spoiler and activator, phase between fluid and flow spoiler and activator, will be produced Interaction.Under certain conditions, when fluid flows through flow spoiler and activator can behind face formed two row direction of rotation contrary and The whirlpool periodically alternately come off, alternately coming off of whirlpool can cause the alternate of fluid pressure, even if before and after activator two The fluid pressure differential of side alternately changes, so that activator produces the of reciprocating vibration of left and right directions.For this utility model, swash Even if the left and right the encouraging device radius of curvature forcing piezoelectric vibrator to be deformed piezoelectric vibrator through multidiameter of reciprocating vibration increases and subtracts Little, thus convert mechanical energy into electric energy；Generated electricity is changed and storage circuit through the energy of wire transmission to circuit board, for Temperature sensor, pressure transducer and signal transmitter unit are powered；Meanwhile, the quantity of the voltage waveform that piezoelectric vibrator is generated is also Being extracted, be used for characterizing rate of flow of fluid, rate of flow of fluid signal, temperature signal and pressure signal are launched unit and launch Go.

In this utility model, for making piezoelectric vibrator effectively to be encouraged, monitor is in nominal flow rate v₀Piezoelectricity during lower work The quiet deflection of oscillator is the half of its maximum variable shape amount, a diameter of D=(200～5000) μ/(the ρ v of flow spoiler₀), in formula ρ be fluid density, μ be fluid kinematic viscosity.

In this 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 relevant to structure and fluid property, D is flow spoiler diameter, f_lCause for fluid Activator frequency of vibration, voltage wave figurate number that i.e. piezoelectric vibrator is generated in the unit interval.

In this utility model, for improving piezoelectric vibrator generating capacity and reliability, piezoelectric chip be 0.2～0.3mm PZT4, Metal basal board is beryllium-bronze, and metal basal board is 1～2.5 with the ratio of the thickness of piezoelectric chip, and now the generating capacity of piezoelectric vibrator is relatively By force, energy comparison is big；Energy than the piezoelectric vibrator first order buckling referring to variant thickness ratio deform produced electric energy with wherein Maximum bigger；PZT4 and the piezoelectric vibrator of beryllium-bronze substrate composition are utilized for this utility model, under naturalness Reasonable radius of curvature at metal basal board and piezoelectric chip faying face is Wherein α=h_m/h_pFor thickness ratio, h_mAnd h_pIt is respectively metal basal board h1 and the thickness of piezoelectric chip h2.

Advantage and characteristic: utilize the fluid structure interaction between flow spoiler and activator and fluid to realize self-excited vibration and send out Electricity and flow velocity are measured automatically, it is not necessary to outside energy supply, without electromagnetic interference, and the flow velocity real-time online that can realize real meaning is supervised Survey；Monitor configures along pipe lengths, and simple in construction, radial dimension are little, it is easy to by using many piezoelectric vibrators to obtain institute Need energy；Piezoelectric vibrator is rational in infrastructure, deflection is controlled and each point stress distribution uniform, therefore generated energy is big, reliability is high.

Accompanying drawing explanation

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

Fig. 2 is the left view of Fig. 1；

Fig. 3 is the structural representation of transducer in one preferred embodiment of this utility model；

Fig. 4 is the left view of Fig. 3；

Fig. 5 be in one preferred embodiment of this utility model piezoelectric vibrator energy than the graph of relation with thickness ratio.

Detailed description of the invention

Cylindrical flow spoiler q is installed through gusset one b1, through gusset two b2, inner core c, flow-disturbing is installed on the inwall of pipeline a The center of device q is vertical with the center of inner core c, and inner core about c two ends are provided with left end cap k and right end cap g through screw respectively；Left end Being inlaid with temperature sensor S1 and pressure transducer S2 on lid k, left end cap k is provided with sending out through screw near the side of inner core c Penetrating the circuit board d of unit P, the left half axle m1 of multidiameter m stretches out from inner core c through the centre bore of left end cap k, left half axle m1 end Activator n is installed；Being cased with balancing spring j1 and limit spring j2 on left half axle m1, balancing spring about j1 two ends lean respectively On activator n and left end cap k, about limit spring j2, two ends act against the right axle shaft m2's of left end cap k and multidiameter m respectively Side, right axle shaft m2 end face and right end cap g side are all inlaid with cushion pad e；The metal basal board h1 protruding with circular arc and Metal Substrate Piezoelectric chip h2 bonding on the convex surface of plate h1 constitutes piezoelectric vibrator h, two piezoelectric vibrator h and metal basal board h1 two ends warp thereof Two ∏ type framework i that screw is installed constitute transducer H, and in same transducer H, the metal basal board h1 of two piezoelectric vibrator h leans on Nearly installation, transducer H is placed in inner core c and can be along inner core c slide；In inner core c, the piezoelectric vibrator h of the leftmost side and the rightmost side is respectively Being connected with the cushion pad e on right axle shaft m2 and right end cap g, piezoelectric vibrator h adjacent on two different transducer H is through isolating pad f It is connected；During inoperative, in transducer H, the end of the limitting casing i1 on two ∏ type framework i contacts with each other, to avoid piezoelectric chip H2 fragmentation because suffered stress is excessive；Being connected with circuit board d after wire is parallel with one another between each piezoelectric vibrator h, parallel connection is again Refer to be connected with each other through wire between each piezoelectric chip h2, be connected with each other through wire between each metal basal board h1.

During work, when having fluid to flow through flow spoiler q and activator n, will produce between fluid and flow spoiler q and activator n Raw interaction.Under certain conditions, two row direction of rotation can be formed in face behind when fluid flows through flow spoiler q and activator n The whirlpool alternately come off on the contrary and periodically, alternately coming off of whirlpool can cause the alternate of fluid pressure, even if activator Before and after n, the fluid pressure differential of both sides alternately changes, so that activator n produces the of reciprocating vibration of left and right directions.For this reality With novel, though the left and right of the activator n song forcing piezoelectric vibrator h to be deformed piezoelectric vibrator h through multidiameter m of reciprocating vibration Rate radius increases and reduces, thus converts mechanical energy into electric energy；Generated electricity turns to the energy of circuit board d through wire transmission Change and store circuit, powering for temperature sensor S1, pressure transducer S2 and signal transmitter unit P；Meanwhile, piezoelectric vibrator h institute The quantity of the voltage waveform generated also is extracted, and is used for characterizing rate of flow of fluid, rate of flow of fluid signal, temperature signal and pressure Signal is launched unit P and launches.

In this utility model, for making piezoelectric vibrator h effectively to be encouraged, monitor is in nominal flow rate v₀Piezoelectricity during lower work The quiet deflection of oscillator h is the half of its maximum variable shape amount, a diameter of D=(200～5000) μ/(the ρ v of flow spoiler q₀), formula Middle ρ be fluid density, μ be fluid kinematic viscosity.

In this utility model, the flow velocity of fluids within pipes is by the generation voltage waveform quantity of piezoelectric vibrator h in the unit interval Characterize, be v=f_lD/S_t, S in formula_tFor the coefficient relevant to structure and fluid property, D is the diameter of flow spoiler q, f_lFor stream The voltage wave figurate number that in the frequency of vibration of activator n that body causes, i.e. unit interval, piezoelectric vibrator h is generated.

In this utility model, for improving generating capacity and the reliability of piezoelectric vibrator h, piezoelectric chip h2 is 0.2～0.3mm PZT4, metal basal board h1 are beryllium-bronze, the ratio of the thickness of metal basal board h1 and piezoelectric chip h2 is 1～2.5, now piezoelectric vibrator h Generating capacity compared with strong, energy comparison is big；Energy deforms produced electric energy than the piezoelectric vibrator h first order buckling referring to variant thickness ratio Bigger with maximum therein；PZT4 and the piezoelectric vibrator h of beryllium-bronze substrate composition, naturalness are utilized for this utility model Reasonable radius of curvature at lower metal basal board h1 and piezoelectric chip h2 faying face is Wherein α=h_m/h_pFor thickness ratio, h_mAnd h_pIt is respectively metal basal board h1 and the thickness of piezoelectric chip h2.

Obviously, this utility model is to utilize the fluid structure interaction between flow spoiler q and activator n and fluid to realize from exciting Dynamic generating and flow velocity are measured automatically, it is not necessary to outside energy supply, without electromagnetic interference, can realize the flow velocity real-time online of real meaning Monitoring；Monitor configures along pipe lengths, and simple in construction, radial dimension are little, it is easy to by using many piezoelectric vibrators to obtain Required energy；Piezoelectric vibrator is rational in infrastructure, deflection is controlled and each point stress distribution uniform, therefore generated energy is big, reliability is high.

Claims (1)

1. a self-powered oil and gas pipes monitoring device, it is characterised in that: it is separately installed with through gusset one and two on inner-walls of duct The center of cylindrical flow spoiler and inner core, flow spoiler and inner core is mutually perpendicular to, two ends, inner core left and right be separately installed with left end cap and Right end cap；Being inlaid with temperature sensor and pressure transducer on left end cap, left end cap is provided with near the side of inner core launching The circuit board of unit, the left half axle of multidiameter stretches out from inner core through left end cap centre bore, and left half axle end is provided with activator； Being cased with balancing spring and limit spring on left half axle, two ends, balancing spring left and right act against on activator and left end cap respectively, limit Two ends, spring left and right, position act against left end cap and the side of multidiameter right axle shaft, right axle shaft end face and right end cap side respectively and all inlay It is embedded with cushion pad；Piezoelectric chip bonding on the metal basal board protruding with circular arc and metal basal board convex surface constitutes piezoelectric vibrator, Two ∏ type frameworks that two piezoelectric vibrators and metal basal board two ends thereof are installed constitute transducer, two pressures in same transducer The metal basal board of electric tachometer indicator is near installing, and transducer is placed in inner core and can slide along inner core；The leftmost side and the rightmost side in inner core Piezoelectric vibrator be connected with the cushion pad on right axle shaft and right end cap respectively, piezoelectric vibrator warp adjacent on two different transducers Isolating pad is connected.