CN104485844A - Miniature power generation device used for power supply of pipeline monitoring system - Google Patents

Abstract

The invention relates to a miniature power generation device used for power supply of a pipeline monitoring system and belongs to the field of new energy. A fixed round plate is installed on the inner side of a pipeline, and a bearing is inlaid in the center of a round press plate; a stepped hole is formed in the right side of the fixed round plate, and a circuit board and a sensor are inlaid in the stepped hole; the round press plate and the fixed round plate are connected to form a seal cavity, and an energy converter is installed inside the seal cavity; the fixed round plate and a boss of the round press plate form a sliding groove, and a magnet is contained in the sliding groove; one end of each metal base is installed in the fixed round plate and the round press plate, the other end of each metal base is fixed to the magnet, a piezoelectric plate is bonded outside each metal base in a protruding mode, and the two bases and the bonded piezoelectric plates form the energy converter; a main shaft is installed on an inner ring of the bearing, and a blade is arranged at the front end of the main shaft; an annular magnet is embedded in the tail end of the main shaft, the annular magnet is installed in the manner of being close to the opposite magnetic pole of the magnet in the sliding groove, the annular magnet is fixed by the round press plate, and the round press plate is fixed to the tail end of a shaft through screws. The miniature power generation device used for power supply of the pipeline monitoring system has the advantages that only tensile stress acts on the piezoelectric plates, so reliability is high; the sliding groove is high in structural stability, and the miniature power generation device is high in power generation and supply capacity.

Description

For the microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) that pepe monitoring system is powered

Technical field

The invention belongs to new forms of energy and technical field of power generation, be specifically related to a kind of microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) of powering for pepe monitoring system.

Background technology

At present, laying remote conveying oil and gas pipes is the important energy conveying engineering of China, but causes huge resource and economic loss to country with artificially stealing due to pipe leakage.Most important by arranging monitoring node in remote conveying oil and gas pipes different distance, but traditional remote conveying oil and gas pipes monitoring system is powered mainly through following several mode: as cable laying, this kind of method cost be high, not easy-maintaining, cable is once produce aging, fracture, multiple monitoring node device will be made to work, and easily stolen by lawless person; Utilize battery to be also a kind of traditional supply power mode, but due to shortcomings such as limited battery life, needs replacings in time, the application of wireless sensing monitoring device is restricted.Therefore, for making pepe monitoring system be able to works fine, its powerup issue must be solved.In life, self-contained electric system in a lot of fields in all well applied, fluid dynamic energy is as the free of contamination novel energy of one, be widespread in nature, fluid power-generation has become one of world today's mainstream technology, has pollution-free, utilance advantages of higher, design take fluid dynamic energy as the microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) of the energy, has become the important trend of powering to pepe monitoring system.

Summary of the invention

For all drawbacks that the self-powered demands status of pipe-line monitoring system and existing electric power system exist, the present invention proposes a kind of microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) of powering for pepe monitoring system.

The technical scheme that the present invention takes is: fixed disc is fixed by screws on the boss of insides of pipes, and circular pressing plate center is embedded with bearing; Be provided with shoulder hole on the right side of fixed disc, in shoulder hole, stud with circuit board and transducer respectively; Circular pressing plate boss place is connected with fixed disc by rivet, and the boss of fixed disc and circular pressing plate forms a chute, lays a magnet in chute, circular pressing plate and fixed disc shape annular seal space; Described annular seal space is built with transducer, one end of metal substrate is fixed by screws in fixed disc and circular pressing plate, the other end is fixed by screws on above-mentioned magnet, outer protrusion on described metal substrate is bonded with piezoelectric patches, jointly form transducer by bonding piezoelectric patches on rivet two substrates and described substrate, on transducer, on different substrate, two piezoelectric patches are connected by wire group; On transducer, metal substrate is connected with circuit board respectively by wire group with piezoelectric patches; The inner ring of bearing is provided with main shaft, and front-end of spindle is provided with blade; Main shaft end is inlaid with annular magnet, and in annular magnet and chute, magnet opposite pole is near installing, and annular magnet is fixed by pressing plate, and described pressing plate is fixed on shaft end by screw.

In the course of work, when impeller rotates under fluid matasomatism, the annular magnet on driven rotary axle does circular-rotation, thus relatively rotates with the magnet in chute; Install because annular magnet and magnet are that opposite pole is close, under certain magneticaction, transducer tension, piezoelectric patches compression chord on transducer; When annular magnet and magnet cycle rotation, because being provided with spline in annular magnet endoporus equably, its wall thickness is not waited, namely the magnetic field intensity of circumferencial direction each point is different, therefore the attraction in described annular magnet rotation process and on transducer between magnet alternately increase and reduce, namely pulling force suffered by transducer and the compression suffered by piezoelectric patches alternately increase and reduce, convert electric energy to by mechanical energy in the process that piezoelectric patches institute compression chord alternately changes, this is power generation process; Generated electricity is connected to circuit board by wire group, and circuit board is provided with energy-storage travelling wave tube, is transducer energy supply by energy-storage travelling wave tube.

In the present invention, for improve transducer generating capacity, avoid piezoelectric patches to damage because of tension stress effect, should guarantee transducer by External Force Acting, non-telescope distortion time, on the metal substrate of transducer, the least radius of circular arc external surface is R=h{ α+0.5 [α ²(1-β)-1-η E _p/ T _p1-α]/[(1-β)] }, the minimum range in chute on magnet movement direction is D=[L-2Rsin (0.5L/R)] n, wherein $\mathrm{\η}=(1-\mathrm{\α})[1-\mathrm{\α}(1-\mathrm{\β})]+\mathrm{\α\β}/(1+k_{31}^2),$ α=h _m/ h, h=h _m+ h _p, h _p, h _mbe respectively the thickness of piezoelectric patches and metal substrate, β=E _m/ E _p, E _p, E _mbe respectively the Young's modulus of piezoelectric patches and metal substrate, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric, L is the arc length of single circular arc on metal substrate, and n is the circular arc quantity on single metal substrate.

Features and advantages of the present invention: 1. pre-bending piezoelectric patches iso-stress distortion of the present invention, only bear action of compressive stress, reliability is high; 2. the use of sliding groove structure, be out of shape controlled, stability is high; 3. transducer architecture is novel, and rationally, power supply capacity is strong in configuration.

Accompanying drawing explanation

Fig. 1 is the section of structure of microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) in a preferred embodiment of the present invention;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is enlarged drawing and the vertical view of transducer;

Embodiment

Fixed disc 2 is fixed by screws on the boss 1a inside pipeline 1, and circular pressing plate 2 center is embedded with bearing 8; Be provided with shoulder hole 2b on the right side of fixed disc 2, in shoulder hole 2b, stud with circuit board 4 and transducer S respectively; Circular pressing plate 5 boss 5b place is connected with fixed disc 2 by rivet, and fixed disc 2 forms a chute Q with boss 2a and 5a of circular pressing plate 5, lays a magnet 9 in chute Q, circular pressing plate 5 and fixed disc 2 shape annular seal space P; Described annular seal space P is built with transducer 6, one end 12a of metal substrate 12 is fixed by screws in fixed disc 2 and circular pressing plate 5, other end 12b is fixed by screws on above-mentioned magnet 9, outer protrusion on described metal substrate 12 is bonded with piezoelectric patches 13, jointly form transducer 6 by piezoelectric patches 13 bonding on rivet two substrates 12 and described substrate, on transducer 6, on different substrate, two piezoelectric patches are connected by wire group L1; On transducer 6, metal substrate 12 is connected with circuit board 4 respectively by wire group L2 with piezoelectric patches 13; The inner ring of bearing 8 is provided with main shaft 10, and front end is provided with blade 14 with main shaft 10; Main shaft 10 end 10a is inlaid with annular magnet 11, and annular magnet 11 and magnet 9 opposite pole in chute Q are near installing, and annular magnet 11 is fixed by pressing plate 7, and described pressing plate 7 is fixed on axle 10 end 10a by screw.

In the present invention, utilize PZT (piezoelectric transducer) 6 to convert the kinetic energy that oil gas flows to electric energy, namely can be gas oil pipe leakage without the need to cable laying or battery and anti-theft monitoring system provides reliable, sufficient energy supply.Working method is: when impeller 14 rotates under fluid matasomatism, and the annular magnet 11 on driven rotary axle 10 does circular-rotation, thus relatively rotates with the magnet 9 in chute Q; Install because annular magnet 11 and magnet 9 are that opposite pole is close, under certain magneticaction, transducer 6 tension, piezoelectric patches 13 compression chord on transducer 6; When annular magnet 11 and magnet 9 cycle rotation, because being provided with spline in annular magnet 11 endoporus equably, its wall thickness is not waited, namely the magnetic field intensity of circumferencial direction each point is different, therefore the attraction in described annular magnet 11 rotation process and on transducer 6 between magnet 9 alternately increase and reduce, namely pulling force suffered by transducer 6 and the compression suffered by piezoelectric patches 13 alternately increase and reduce, convert electric energy to by mechanical energy in the process that piezoelectric patches 13 compression chords alternately change, this is power generation process; Generated electricity is connected to circuit board 4 by wire group L2, and circuit board 4 is provided with energy-storage travelling wave tube, is transducer S energy supply by energy-storage travelling wave tube.

In the present invention; for improve transducer 6 generating capacity, avoid piezoelectric patches 13 to damage because of tension stress effect; when should guarantee transducer 6 not by External Force Acting, non-telescope distortion, on the metal substrate 12 of transducer 6, the least radius of circular arc external surface is R=h{ α+0.5 [α ²(1-β)-1-η E _p/ T _p1-α]/[(1-β)] }, the minimum range in chute Q in magnet 9 direction of motion is D=[L-2Rsin (0.5L/R)] n, wherein $\mathrm{\η}=(1-\mathrm{\α})[1-\mathrm{\α}(1-\mathrm{\β})]+\mathrm{\α\β}/(1+k_{31}^2),$ α=h _m/ h, h=h _m+ h _p, h _p, h _mbe respectively the thickness of piezoelectric patches 13 and metal substrate 12, β=E _m/ E _p, E _p, E _mbe respectively the Young's modulus of piezoelectric patches 13 and metal substrate 12, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric, L is the arc length of single circular arc on metal substrate 12, and n is the circular arc quantity on single metal substrate 12.

Claims (1)

1. for the microminiature Blast Furnace Top Gas Recovery Turbine Unit (TRT) that pepe monitoring system is powered, it is characterized in that: fixed disc is fixed by screws on the boss of insides of pipes, circular pressing plate center is embedded with bearing; Be provided with shoulder hole on the right side of fixed disc, in shoulder hole, stud with circuit board and transducer respectively; Circular pressing plate boss place is connected with fixed disc by rivet, and the boss of fixed disc and circular pressing plate forms a chute, lays a magnet in chute, circular pressing plate and fixed disc shape annular seal space; Described annular seal space is built with transducer, one end of metal substrate is fixed by screws in fixed disc and circular pressing plate, the other end is fixed by screws on above-mentioned magnet, outer protrusion on described metal substrate is bonded with piezoelectric patches, jointly form transducer by bonding piezoelectric patches on rivet two substrates and described substrate, on transducer, on different substrate, two piezoelectric patches are connected by wire group; On transducer, metal substrate is connected with circuit board respectively by wire group with piezoelectric patches; The inner ring of bearing is provided with main shaft, and front-end of spindle is provided with blade; Main shaft end is inlaid with annular magnet, and in annular magnet and chute, magnet opposite pole is near installing, and annular magnet is fixed by pressing plate, and described pressing plate is fixed on shaft end by screw;

For improve transducer generating capacity, avoid piezoelectric patches to damage because of tension stress effect, should guarantee transducer by External Force Acting, non-telescope distortion time, on the metal substrate of transducer, the least radius of circular arc external surface is R=h{ α+0.5 [α ²(1-β)-1-η E _p/ T _p1-α]/[(1-β)] }, the minimum range in chute on magnet movement direction is D=[L-2R sin (0.5L/R)] n, wherein $\mathrm{\η}=(1-\mathrm{\α})[1-\mathrm{\α}(1-\mathrm{\β})]+\mathrm{\α\β}/(1+k_{31}^2),$ α=h _m/ h, h=h _m+ h _p, h _p, h _mbe respectively the thickness of piezoelectric patches and metal substrate, β=E _m/ E _p, E _p, E _mbe respectively the Young's modulus of piezoelectric patches and metal substrate, t _pbe respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric, L is the arc length of single circular arc on metal substrate, and n is the circular arc quantity on single metal substrate.