CN110752779A - Telescopic pipeline flow generator - Google Patents
Telescopic pipeline flow generator Download PDFInfo
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- CN110752779A CN110752779A CN201910455764.2A CN201910455764A CN110752779A CN 110752779 A CN110752779 A CN 110752779A CN 201910455764 A CN201910455764 A CN 201910455764A CN 110752779 A CN110752779 A CN 110752779A
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- 239000000758 substrate Substances 0.000 claims abstract description 16
- 238000005452 bending Methods 0.000 claims abstract description 14
- 230000003139 buffering effect Effects 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 239000012530 fluid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
Abstract
The invention relates to a telescopic pipeline flow generator, and belongs to the technical field of new energy and pipeline monitoring. The inner wall of the pipeline is provided with a shell through a radial plate, and the end part of the side wall of the shell is provided with an end cover; the left and right sides of a vertical plate of the bracket are provided with left and right pins, and the right sides of the upper and lower ends are provided with transverse plates with inclined mounting surfaces; the bracket is arranged in the shell, the left pin extends out of the bottom wall of the shell, and the end part of the left pin is provided with a blunt body; a supporting spring and a buffering spring are respectively sleeved between the bottom wall of the upper left pin shell, the blunt body and a vertical plate of the bracket; a left spring, an exciter, a frequency modulation block and a right spring are sequentially sleeved on the right pin from left to right, the exciter is connected with the frequency modulation block, and the right end of the right spring abuts against a stop block at the end part of the right pin; the upper side and the lower side of the exciter are provided with moving cams which are composed of bottom surfaces, inclined surfaces and top surfaces along the axial direction of the pin hole; one end of the piezoelectric vibrator is arranged on the mounting surface of the bracket, the flanging of the piezoelectric vibrator substrate is in contact with the middle point of the cam inclined plane during non-working, the pre-bending deformation is half of the allowable value, and the allowable deformation of the piezoelectric vibrator is larger than the cam lift.
Description
Technical Field
The invention belongs to the technical field of new energy and oil and gas pipeline monitoring systems, and particularly relates to a telescopic pipeline flow generator.
Background
The leakage of the oil and gas pipeline caused by natural corrosion, ineffectiveness in the natural world, especially artificial theft, etc. occurs occasionally during the operation of the oil and gas pipeline, which not only causes huge economic loss, but also causes serious pollution to the surrounding natural environment. In the past, the pipeline leakage monitoring or anti-theft system is maintained by a manual inspection method, but because the pipeline is long in laying distance and is often positioned in places which are rare or inconvenient to traffic, leakage is difficult to find and maintain in time, so that various types of pipeline leakage monitoring or anti-theft systems are proposed successively by people, and some technologies are mature; but the power supply problem of the current oil and gas pipeline monitoring system is not well solved: the cable laying cost is high, the cable is easy to be cut off by lawless persons to influence the normal operation of the monitoring system, the service time is limited when the battery is powered, the monitoring system needs to be frequently replaced, and once the battery is insufficient in electric quantity and is not replaced in time, the remote transmission of monitoring information cannot be completed. Therefore, the novel self-generating technology or the novel self-generating technology can provide effective energy guarantee for popularization and application of the oil and gas pipeline monitoring technology.
Disclosure of Invention
The invention provides a telescopic pipeline flow generator, which adopts the following implementation scheme: the inner wall of the pipeline is provided with a shell through a radial plate, and the end part of the side wall of the shell is provided with an end cover through a screw; left and right pins are respectively arranged on the left and right sides of a vertical plate of the bracket, the left and right pins are coaxial, and the cross sections of the left and right pins are respectively circular and square; the right sides of the upper end and the lower end of the vertical plate are provided with transverse plates, inclined mounting surfaces are arranged on the transverse plates, the mounting surfaces are positioned on the hole walls of the transverse plates, an acute angle formed by the mounting surfaces and the transverse plates is a mounting angle, and the mounting angle is larger than 30 degrees; the bracket is arranged in a body cavity of the shell, the left pin extends out of the guide hole in the bottom wall of the shell, the end part of the left pin is provided with a blunt body through a nut, the blunt body consists of an elastic sheet and rigid sheets clamped by two sides of the elastic sheet, and the radius ratio of the rigid sheets to the elastic sheet is 0.4-1; a supporting spring and a buffering spring are sleeved on the left pin, the left end and the right end of the supporting spring are respectively propped against the blunt body and the bottom wall of the shell, and the left end and the right end of the buffering spring are respectively propped against the bottom wall of the shell and a vertical plate of the bracket; the left spring, the exciter, the frequency modulation block and the right spring are sequentially sleeved on the right pin from left to right, a pin hole of the exciter is sleeved on the right pin, the exciter is connected with the frequency modulation block through a screw, a stop block is mounted at the end part of the right pin through a screw, the right end of the right spring abuts against the stop block, the outer edge of the stop block is in contact with the inner wall of the body cavity and is in clearance fit with the inner wall of the body cavity, and the stop block is also a frequency modulation mass; the upper side and the lower side of the exciter are provided with a plurality of cams along the axial direction of the pin hole, the cams are moving cams, the cam surfaces of the cams are formed by a bottom surface, an inclined surface and a top surface which are sequentially connected, the distance between the bottom surface and the top surface is a cam lift range, an acute angle formed between the bottom surface and the inclined surface is a cam lead angle, and the cam lead angle is 30-50 degrees; one end of the piezoelectric vibrator is arranged on the mounting surface of the bracket through a screw and a pressing strip, the piezoelectric vibrator is of a cantilever beam structure formed by bonding a substrate with equal thickness and a piezoelectric sheet, the substrate is arranged close to the exciter, and a flanging at the free end of the substrate abuts against the cam surface; when the piezoelectric vibrator is not in work, the flanging of the base plate is in contact with the middle point of the inclined plane of the cam, the pre-bending deformation generated by the installation of the piezoelectric vibrator is half of the allowable deformation of the piezoelectric vibrator, and the allowable deformation of the piezoelectric vibrator is greater than the lift of the cam.
In the invention, the piezoelectric vibrator is of a straight or pre-bent structure in a natural state before being installed; when the piezoelectric vibrator is in a pre-bending structure before being installed, the pre-bending radius of the substrate is smaller than that of the piezoelectric sheet, and the pre-bending radius of the bonding surface of the substrate and the piezoelectric sheet is
When the piezoelectric vibrator is in a straight structure before installation and two layers of fixed ends of the piezoelectric vibrator are clamped, the allowable deformation of the piezoelectric vibrator is
In the above formula, l is the cantilever length of the piezoelectric vibrator, h is the total thickness of the piezoelectric vibrator, β ═ Em/Ep，EmAnd EpThe modulus of elasticity, T, of the substrate and piezoelectric sheet material, respectivelypAnd k31Allowable stress and electromechanical coupling system of piezoelectric sheet material respectivelyAnd (4) counting.
When the passive body reaches a dynamic balance state under the combined action of the fluid dynamic pressure, the support spring and the buffer spring, the passive body is vibrated left and right by the vortex induced vibration generated by the action of the fluid, and the support is vibrated left and right by the left pin, and the support is vibrated left and right by the left and right springs so that the piezoelectric vibrator generates reciprocating bending deformation along the inclined plane of the cam, namely mechanical energy is converted into electric energy in the reciprocating bending deformation process of the piezoelectric vibrator, wherein the deformation process of the piezoelectric vibrator is that ① when the exciter leaves the balance position and the flanging of the baseplate at the free end of the piezoelectric vibrator rises along the inclined plane of the cam, the deformation of the piezoelectric vibrator gradually increases, when the exciter moves and the flanging of the baseplate is in contact with the top surface of the cam, the deformation of the piezoelectric vibrator reaches the maximum and does not increase along with the continuous movement of the exciter, when the ② when the exciter leaves the balance position and the flanging of the baseplate descends along the inclined plane of the cam, the deformation of the piezoelectric vibrator gradually decreases, when the flanging of the exciter moves and the flanging of the baseplate is in contact with the top surface of the cam, the bottom surface of the baseplate is kept in contact with the flanging of the dead cam, and the bottom surface of the flanging of the baseplate is kept to be in contact with the minimal deformation of the flanging of the left cam.
In the invention, the exciter synchronously excites a plurality of groups of piezoelectric vibrators, and the power generation capacity is strong; the maximum deformation of each piezoelectric vibrator is smaller than the cam lift, and the piezoelectric sheet only bears the compressive stress, so that the reliability is high; the generator is a two-degree-of-freedom system, and the vibration response characteristic of the generator is easy to adjust through related springs and system quality, so that the environment adaptability is strong, and the frequency band is wide.
Advantages and features: the piezoelectric vibrator is not directly coupled with the fluid, the dynamic performance is not influenced by the fluid, and the piezoelectric vibrator is easy to ensure through design; the piezoelectric vibrator is bent and deformed in one direction, the deformation amount is controllable, and the maximum deformation of the piezoelectric vibrator is smaller than the lift range of the cam, so that the power generation capacity is high and the reliability is high; the generator is a two-degree-of-freedom system, the exciter synchronously excites a plurality of piezoelectric vibrators, and the vibration response characteristic of the exciter is easy to adjust through the rigidity and the mass of the spring, so that the power generation capacity is high, and the effective frequency band is wide.
Drawings
FIG. 1 is a schematic diagram of a generator according to a preferred embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is an enlarged view of portion 1 of FIG. 1;
FIG. 4 is a schematic diagram of the exciter in accordance with a preferred embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the conduit and housing in accordance with a preferred embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the stand according to a preferred embodiment of the present invention.
Detailed Description
A shell a is arranged on the inner wall of the pipeline G through a web plate G1, and an end cover b is arranged at the end part of the side wall a2 of the shell a through a screw; the left side and the right side of a vertical plate c1 of the bracket c are respectively provided with a left pin c2 and a right pin c3, the left pin c2 and the right pin c3 are coaxial, and the cross sections of the left pin c2 and the right pin c3 are respectively circular and square; the right sides of the upper end and the lower end of the vertical plate c1 are provided with transverse plates c4, the transverse plate c4 is provided with inclined mounting surfaces c5, the mounting surfaces c5 are positioned on the hole wall of the transverse plate c4, an acute angle c6 formed by the mounting surfaces c5 and the transverse plate c4 is a mounting angle, and the mounting angle is larger than 30 degrees; the bracket c is arranged in a body cavity a3 of the shell a, a left pin c2 extends out of a guide hole on a bottom wall a1 of the shell, a blunt body n is arranged at the end part of the left pin c2 through a nut, the blunt body n is composed of an elastic sheet n1 and a rigid sheet n2 clamped at two sides of the elastic sheet n1, and the ratio of the radius of the rigid sheet n2 to the radius of the elastic sheet n1 is 0.4-1; a supporting spring k1 and a buffering spring k2 are sleeved on the left pin c2, the left end and the right end of the supporting spring k1 are respectively abutted against the bluff body n and the shell bottom wall a1, and the left end and the right end of the buffering spring k2 are respectively abutted against the shell bottom wall a1 and a vertical plate c1 of the bracket c; a left spring k3, an exciter f, a frequency modulation block i and a right spring k4 are sequentially sleeved on the right pin c3 from left to right, a pin hole f4 of the exciter f is sleeved on the right pin c3, the exciter f is connected with the frequency modulation block i through a screw, a stop j is mounted at the end of the right pin c3 through a screw, the right end of the right spring k4 abuts against the stop j, the outer edge of the stop j is in contact with the inner wall of the body cavity a3 and is in clearance fit, and the stop j is also a frequency modulation mass block; a plurality of cams f0 are arranged on the upper side and the lower side of the exciter f along the axial direction of the pin hole f4, the cam surface of each cam f0 is composed of a bottom surface f1, an inclined surface f2 and a top surface f3 which are sequentially connected, the distance f5 between the bottom surface f1 and the top surface f3 is a cam lift, an acute angle f6 formed between the bottom surface f1 and the inclined surface f2 is a cam lead angle, and the cam lead angle f6 is 30-50 degrees; one end of a piezoelectric vibrator d is arranged on an installation surface c5 of the bracket c through a screw and a pressing strip e, the piezoelectric vibrator d is of a cantilever beam structure formed by bonding a substrate d1 and a piezoelectric sheet d2 which are of equal thickness, the substrate d1 is arranged close to the exciter f, and a flanging at the free end of the substrate d1 abuts against a cam surface; when the piezoelectric vibrator d is not in work, the flanging of the base plate d1 is in contact with the middle point of the inclined surface f2 of the cam f0, the pre-bending deformation amount generated by the installation of the piezoelectric vibrator d is half of the allowable deformation amount of the piezoelectric vibrator d, and the allowable deformation amount of the piezoelectric vibrator d is larger than the lift of the cam.
In the invention, the piezoelectric vibrator d is in a straight or pre-bent structure in a natural state before being installed; when the piezoelectric vibrator d is in a pre-bending structure before being mounted, the pre-bending radius of the substrate d1 is smaller than that of the piezoelectric sheet d2, and the pre-bending radius of the bonding surface of the substrate d1 and the piezoelectric sheet d2 is equal to that of the piezoelectric sheet d2
When the piezoelectric vibrator d is in a straight structure before being installed and two layers of fixed ends of the piezoelectric vibrator d are clamped, the allowable deformation of the piezoelectric vibrator d is
In the above formula, l is the cantilever length of the piezoelectric vibrator d, h is the total thickness of the piezoelectric vibrator d, and β ═ Em/Ep，EmAnd EpThe elastic moduli, T, of the materials of the substrate d1 and the piezoelectric sheet d2pAnd k31The allowable stress and electromechanical coupling coefficient of the piezoelectric sheet d2 material, respectively.
When the bluff body n and the bracket c move rightwards under the combined action of hydrodynamic pressure, a supporting spring k1 and a buffering spring k2, the bluff body n vibrates leftwards and rightwards under the action of fluid, the bracket c is further vibrated leftwards and rightwards through a left pin c2, the bracket c further enables an exciter f and a frequency modulation block i to vibrate leftwards and rightwards along a right pin c3 through a left spring k3 and a right spring k4, the piezoelectric vibrator d generates reciprocating bending deformation along an inclined plane f2 of a cam f0, mechanical energy is converted into electric energy in the reciprocating bending deformation process of the piezoelectric vibrator d, the deformation process of the piezoelectric vibrator d is that the exciter f ① leaves a balance position, when a flanging of the baseplate d1 at the free end of the piezoelectric vibrator d rises along the inclined plane f1 of the cam f1, the deformation amount of the piezoelectric vibrator d gradually increases, the exciter f moves, the flanging of the baseplate d1 is enabled to be in contact with the top surface f1 f of the flanging of the cam f1, the flanging, the baseplate d1, the flanging of the baseplate d is enabled to be gradually reduced along with the exciting amount of the flanging of the piezoelectric vibrator f, and the flanging of the baseplate f, the baseplate d1, the baseplate f, the flanging of the baseplate d1 is enabled to be gradually reduced along with the exciting amount of the bottom surface 1, and the bottom surface 36f, the flanging of the baseplate f, the baseplate d1, the baseplate f, the baseplate 1, the baseplate f, and the baseplate f, the baseplate 1, the baseplate f.
In the invention, the exciter f synchronously excites a plurality of groups of piezoelectric vibrators d, so that the power generation capability is strong; the maximum deformation of each piezoelectric vibrator d is smaller than the cam lift, and the piezoelectric sheet d2 only bears the compressive stress, so that the reliability is high; the generator is a two-degree-of-freedom system, and the vibration response characteristic of the generator is easy to adjust through related springs and system quality, so that the environment adaptability is strong, and the frequency band is wide.
Claims (1)
1. A telescopic pipe flow generator is characterized in that: the inner wall of the pipeline is provided with a shell through a radial plate, and the end part of the side wall of the shell is provided with an end cover; the left side and the right side of a vertical plate of the bracket are respectively provided with a left pin and a right pin, the right sides of the upper end and the lower end of the vertical plate are respectively provided with a transverse plate, and the transverse plates are respectively provided with an inclined mounting surface; the bracket is arranged in a body cavity of the shell, the left pin extends out of the guide hole in the bottom wall of the shell, the end part of the left pin is provided with a blunt body, the blunt body consists of an elastic sheet and rigid sheets clamped by two sides of the elastic sheet, and the radius ratio of the rigid sheets to the elastic sheet is 0.4-1; a supporting spring and a buffering spring are sleeved on the left pin, the left end and the right end of the supporting spring are respectively propped against the blunt body and the bottom wall of the shell, and the left end and the right end of the buffering spring are respectively propped against the bottom wall of the shell and a vertical plate of the bracket; a left spring, an exciter, a frequency modulation block and a right spring are sequentially sleeved on the right pin from left to right, the exciter is connected with the frequency modulation block, a stop block is arranged at the end part of the right pin, and the right end of the right spring abuts against the stop block; a plurality of cams are arranged on the upper side and the lower side of the exciter along the axial direction of the pin hole, the cam surface of each cam is composed of a bottom surface, an inclined surface and a top surface which are sequentially connected, and the lift angle of each cam is 30-50 degrees; one end of the piezoelectric vibrator is arranged on the mounting surface of the bracket, the piezoelectric vibrator is of a cantilever beam structure formed by bonding a substrate with equal thickness and a piezoelectric sheet, the substrate is arranged close to the exciter, and a flange at the free end of the substrate abuts against the cam surface; when the piezoelectric vibrator is not in work, the flanging of the base plate is in contact with the middle point of the inclined plane of the cam, the pre-bending deformation generated by the installation of the piezoelectric vibrator is half of the allowable deformation of the piezoelectric vibrator, and the allowable deformation of the piezoelectric vibrator is greater than the lift of the cam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455764.2A CN110752779B (en) | 2019-05-18 | 2019-05-18 | Telescopic pipeline flow generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910455764.2A CN110752779B (en) | 2019-05-18 | 2019-05-18 | Telescopic pipeline flow generator |
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| CN110752779A true CN110752779A (en) | 2020-02-04 |
| CN110752779B CN110752779B (en) | 2021-10-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364338A (en) * | 2021-07-05 | 2021-09-07 | 浙江师范大学 | High-power low-flow-rate generator |
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| CN110752779B (en) | 2021-10-08 |
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