Turbine type pipeline internal flow driving buckling beam piezoelectric energy collecting device and method

Abstract

The invention provides a turbine type pipeline internal flow driving buckling beam piezoelectric energy collection device and method. The device comprises a power generation module, an energy optimization module, an energy conversion module and an energy storage module. The power generation module comprises a crankshaft, a front guide wheel, a turbine, a power generation wheel set and a rear guide wheel, the front guide wheel is used for guiding fluid in the pipe; the turbine is used for driving the crankshaft to rotate; the power generation wheel set comprises a plurality of power generation wheels, hubs of the power generation wheels are eccentrically arranged and sleeved on the crankshaft, and the eccentric positions of the power generation wheels are different. The power generation wheel spoke comprises a plurality of buckling beams which are in a buckling state and consistent in buckling direction, and the buckling beams are composed of flexible base beams and piezoelectric patches and used for generating bending deformation to generate electric energy when the crankshaft rotates to drive the power generation wheel hub to do circular motion along the axis. The buckling beam structure is driven to drive the piezoelectric plate to vibrate by means of kinetic energy of fluid in the pipeline, so that vibration energy is recycled, and power can be continuously supplied to underground operation.

Description

Technical Field

[0001] The present invention relates to the technical field of underground power supply, and in particular to a turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device and method. Background Art

[0002] At present, underground measurement while drilling and pipeline flow measurement and control are mostly powered by lithium batteries. Although lithium batteries are compact and easy to install, they also have many disadvantages.

[0003] First of all, lithium batteries have limited power and short lifespan, and need to be replaced regularly, which is not only labor-intensive and material-intensive, but also prone to monitoring interruptions and even equipment damage due to untimely replacement. Furthermore, monitoring equipment powered by lithium batteries usually has a low monitoring frequency, making it difficult to achieve high-frequency, real-time, and precise monitoring. Once the monitoring frequency is increased, the life of lithium batteries will be greatly shortened. In scenarios such as large-scale natural gas and oil pipeline transportation systems or urban water supply networks, where the real-time requirements for flow data are extremely high, low-frequency monitoring may make it difficult to detect pipeline leaks in a timely manner, resulting in serious consequences such as misjudgment of pipeline operation conditions and imbalanced flow allocation, and cannot meet the needs of industrial scenarios. In addition, the subsequent treatment of waste lithium batteries is difficult, and if not handled properly, it will also cause great harm to the environment.

[0004] It can be seen that finding a new sustainable power supply method for the sensor network of underground pipeline monitoring has important engineering significance and social value. Considering that most pipelines are buried deep underground, common new energy power supply technologies such as solar power generation are almost unusable in such scenarios. It is possible to make full use of the kinetic energy of the fluid in the pipeline, recycle it, and continuously power the monitoring network. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device and method. The device cleverly uses the kinetic energy of the fluid inside the pipeline to drive the buckled beam structure, drive the piezoelectric piece to vibrate, and then recover the vibration energy, thereby creating a new power generation mode and providing an effective way to continuously power the underground pipeline monitoring sensor network.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a turbine-type pipeline internal flow driven buckled beam piezoelectric energy harvesting device, comprising a power generation module, an energy optimization module, an energy conversion module and an energy storage module;

[0008] The power generation module comprises a crankshaft extending along the axial direction of the pipeline, and a front guide wheel, a turbine, a generator wheel group and a rear guide wheel arranged in sequence along the axial direction and connected to the crankshaft; the front guide wheel is used to support the crankshaft and guide the fluid in the pipe, and the turbine is used to rotate its blades under the drive of the fluid and drive the crankshaft to rotate; the generator wheel group comprises a plurality of generator wheels, the rim of the generator wheel is fixedly connected to the inner wall of the pipeline, the hub is eccentrically arranged and loosely sleeved on the crankshaft, and the eccentric positions of the plurality of generator wheels are different; the spokes of the generator wheel include a plurality of buckled beams in a buckled state and in the same buckling direction, the buckled beams are composed of a flexible base beam and a piezoelectric sheet, and are used to generate electrical energy by bending and deforming when the crankshaft rotates to drive the hub of the generator wheel to make a circular motion along the axis;

[0009] The energy optimization module is connected to each generator wheel in the generator wheel group and is used to extract the maximum power of the piezoelectric sheet;

[0010] The energy conversion module is connected to the energy optimization module and is used to convert alternating current into direct current;

[0011] The energy storage module is connected to the energy conversion module and is used to collect electric energy.

[0012] Preferably, the rear guide wheel is used to guide the fluid out of the device; and both the front guide wheel and the rear guide wheel include a plurality of blades for guiding the fluid.

[0013] Preferably, the rim of the front guide wheel is fixedly connected to the inner wall of the pipe, and the bearing is loosely sleeved on the crankshaft to support the crankshaft and guide the fluid in the pipe.

[0014] Preferably, the hub of the turbine is fixedly connected to the crankshaft.

[0015] Preferably, the piezoelectric sheets are arranged at both ends of the flexible base beam.

[0016] Preferably, the nonlinear restoring force F of the flexible base beam is q The relationship between (x) and potential energy U(x) and vertical displacement is expressed as:

[0017] F q (x) = k1x 3 +k2x

[0018]

[0019] Where k1 is the nonlinear elastic coefficient of the flexible base beam, k1 = AEπ 4 / 8L 3 ; k2 is the linear elastic coefficient, k2=D(2π 4 / L 3 )-F1(π 2 / 2L); A is the cross-sectional area, A = bh; D is the bending strength, D = bh 3E / 12; L, b, h are the length, width and height of the flexible base beam respectively; E is the elastic modulus; F1 is the axial force.

[0020] Preferably, the energy optimization module includes an extreme value detection control unit and a maximum power point tracking unit connected to each other; the extreme value detection control unit is used to detect the power of the piezoelectric film, and the maximum power point tracking unit is used to capture the maximum piezoelectric film power and adjust the switch of the piezoelectric film so that when the inductor open circuit time is long, energy is stored in the inductor and released at a preset time.

[0021] Preferably, the energy conversion module includes a rectifier bridge circuit, a filter capacitor and a load connected in sequence; the rectifier bridge circuit is used to convert the AC voltage generated by the generator wheel into a DC voltage; the filter capacitor is used to smooth the DC voltage with a pulsation amplitude exceeding a threshold and then transmit it to the load.

[0022] Preferably, the energy storage module is a distributed energy storage module.

[0023] In a second aspect, the present invention provides a method for collecting piezoelectric energy of a buckled beam driven by flow in a turbine-type pipeline, comprising:

[0024] During the drilling process, the drilling fluid flows into the pipeline, passes through the front guide wheel, and impacts the turbine to rotate. The rotating turbine drives the crankshaft to rotate;

[0025] The rotating crankshaft drives the eccentric hub of the generator wheel to make circular motion along the pipeline axis, causing the buckled beam to undergo periodic bending deformation to generate electrical energy;

[0026] The energy optimization module collects the electrical energy of the piezoelectric sheet of the generator wheel at the maximum power, transmits it to the energy conversion module for AC / DC conversion, and transmits the DC power to the energy storage module for collection.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The present invention uses the flow-induced vibration in the pipeline as an excitation to generate piezoelectric power to power the pipeline flow monitoring system, solving the problems of frequent replacement of traditional lithium batteries, low detection frequency, and the risk of environmental pollution caused by waste batteries. The device does not have consumable parts such as batteries, and its service life is much longer than that of lithium batteries. It does not need to replace batteries or maintain them, which saves time and effort, is low in cost, and has no risk of environmental pollution.

[0029] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention but do not constitute a limitation of the present invention.

[0031] Figure 1 A schematic diagram of a piezoelectric energy collection device for a turbine-type pipeline internal flow driven buckled beam provided in an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the structure of a power generation wheel provided in an embodiment of the present invention;

[0033] Figure 3 A front view of a front guide wheel, a turbine, a generator wheel, a rear guide wheel, etc. of a power generation module provided in an embodiment of the present invention;

[0034] Figure 4 A schematic diagram of a multi-source energy fusion energy storage collaborative management strategy provided by an embodiment of the present invention;

[0035] Figure 5 A main flow chart of a method for collecting piezoelectric energy of a buckled beam driven by flow in a turbine-type pipeline provided by an embodiment of the present invention;

[0036] Among them, 1-pipeline; 2-crankshaft; 3-bearing; 4-front guide wheel; 5-turbine; 6-generator wheel; 601-generator wheel rim; 602-generator wheel spoke; 603-generator wheel hub; 6031-buckling beam; 6032-piezoelectric plate; 7-rear guide wheel; I-front guide wheel main view; II-turbine main view; a (b, c, d)-generator wheel main view; III-rear guide wheel. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] Embodiment 1

[0039] like Figure 1 , 2 As shown, this embodiment discloses a turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device, including a power generation module, an energy optimization module, an energy conversion module and an energy storage module.

[0040] The power generation module includes a crankshaft 2 extending axially along the pipeline 1, and a front guide wheel 4, a turbine 5, a generator wheel set and a rear guide wheel 7 which are arranged in sequence along the axial direction and connected to the crankshaft 2.

[0041] The front guide wheel 7 is used to support the crankshaft 2 and guide the fluid in the pipe, and the turbine 5 is used to rotate its blades under the drive of the fluid and drive the crankshaft 2 to rotate.

[0042] The generator wheel group includes multiple generator wheels 6, the generator wheel rim 601 is fixedly connected to the inner wall of the pipeline 1, the hub 603 is eccentrically arranged and loosely sleeved on the crankshaft 2, and the eccentric positions of the multiple generator wheels 6 are different; the generator wheel spoke 602 includes multiple buckled beams 6031 in a buckled state and with the same buckling direction, and the buckled beam 6031 is composed of a flexible base beam and a piezoelectric sheet 6032, which is used to generate electrical energy by bending and deforming when the crankshaft 2 rotates to drive the generator wheel hub 603 to make a circular motion along the axis.

[0043] This embodiment utilizes the "innate condition" of the axial extension of the pipeline to conveniently install and arrange various components along the axial direction of the pipeline, reducing the complex installation process and the need for external support structures, and reducing installation costs and construction difficulties. In addition, there is no need to occupy a large amount of additional external space. By making full use of the space inside the pipeline, the entire system structure is compact and highly integrated, and is suitable for installation and use in environments with limited space (such as underground pipelines). It has good compatibility with existing pipeline systems, does not require large-scale transformation or redesign of pipelines, can be directly applied to existing pipeline facilities, has good versatility and scalability, and is easy to promote and apply in different pipeline systems.

[0044] As an implementation method, Figure 1 The fluid in the pipeline flows in from the left inlet, passes through the front guide wheel 4 with supporting and guiding functions, and reaches the turbine 5. The front guide wheel 4 is loosely sleeved on the crankshaft through the bearing and fixed to the inner wall of the pipe. It can support the rotating crankshaft 2 and guide the fluid in the pipe at the same time.

[0045] In this embodiment, the guiding effect of the front guide wheel can improve the flow state of the fluid in the pipeline, reduce the resistance and turbulence of the fluid flow, enable the fluid to drive the turbine more evenly and efficiently, and thus improve the energy conversion efficiency and output power of the entire system.

[0046] The turbine hub is fixedly connected to the crankshaft 2, and the water flow drives the blades to drive the turbine and the crankshaft to rotate.

[0047] There is a generator wheel 6 at the rear side of the crankshaft. The generator wheel can be multi-stage, thus forming a generator wheel group. The rim of the generator wheel is fixedly connected to the inner wall of the tube, and the hub part is hollowly sleeved on the crankshaft neck. The spokes are multiple piezoelectric beams, which are composed of a flexible base beam and piezoelectric materials. The piezoelectric beams are in a slightly buckled state when installed, and the buckling direction of the buckled beams is consistent. When the generator wheel is installed on the crankshaft, the generator wheel is in an eccentric state, so that the bending degree of the piezoelectric beams on the generator wheel is different. Figure 3 As shown, a, b, and c are generator wheels with different eccentric positions.

[0048] When the crankshaft 2 rotates, the axis of the generator wheel hub moves in a circular motion, causing the buckled piezoelectric beam to undergo periodic bending deformation of varying degrees. According to the principle of the piezoelectric effect, the piezoelectric sheet will produce directional movement of charges during the deformation process, thereby forming a potential difference at both ends of the piezoelectric sheet, causing the piezoelectric sheet to bend repeatedly to generate electricity, thereby realizing the power generation process of converting mechanical energy into electrical energy. After flowing through the multi-stage generator wheel, the water flows out from the rear guide wheel 7. According to needs, multi-stage generator wheels can be installed along the pipeline axis direction, which can improve the power generation capacity of the entire system and meet power supply needs.

[0049] In this embodiment, Figure 1 As shown, the eccentric positions of the multiple generator wheels are different, and the axes of their corresponding sub-crankshafts are parallel to each other but not on the same straight line.

[0050] Traditional eccentric structures may have unbalanced rotating parts, which may cause vibration and noise, affecting the stability and service life of the system. In this embodiment, by setting multiple generator wheels with different eccentric positions in the generator wheel group, the unbalanced forces generated by each generator wheel can offset or balance each other to a certain extent, thereby reducing the overall unbalanced effect and reducing vibration and noise. For example, Figure 3 In the figure, the crankshaft of generator wheel a is eccentric below the origin of the coordinate system, and the crankshaft of generator wheel c is eccentric above the origin of the coordinate system. When they rotate at the same angular velocity, the upward centrifugal force generated by the crankshaft of generator wheel c and the downward centrifugal force generated by the crankshaft of generator wheel a are equal in magnitude and opposite in direction in the vertical direction, and cancel each other out.

[0051] In order to ensure the effectiveness and stability of the transmission, this embodiment preferably uses a coupling to connect the sub-crankshafts. Specifically:

[0052] A coupling with high-precision fit is installed at the connecting end of the sub-crankshaft. One end of the coupling is fixed to a sub-crankshaft by a key connection or interference fit, and the other end is connected to the adjacent sub-crankshaft in the same way, ensuring that during the rotation of the crankshaft, the sub-crankshafts can maintain good coaxiality and transmission accuracy, effectively transmit power, and at the same time buffer and absorb vibrations and impacts that may be caused by factors such as eccentricity, thereby ensuring the stability and reliability of the entire transmission system, allowing multiple generators to work in coordination and efficiently convert mechanical energy into electrical energy.

[0053] In addition, the spokes of the generator wheel include multiple buckled beams in a buckled state and in the same buckling direction. The multiple buckled beams are evenly distributed, which can disperse the impact force and avoid stress concentration. They can also change the force transmission path so that the impact force is transmitted in a more gentle and dispersed manner, thereby reducing the impact and vibration of the system and enhancing stability. At the same time, the eccentric setting of multiple generator wheels and the design of the buckled beams enable the piezoelectric beams on different generator wheels to bend and deform to different degrees at different times during the rotation of the crankshaft, thereby achieving a more continuous and stable power output and improving the periodicity and stability of power generation. Secondly, this structure can make more full use of the rotational energy of the crankshaft, improve the energy conversion efficiency, and enable the system to generate more electricity under the same fluid flow and flow rate conditions.

[0054] As a specific implementation, the piezoelectric sheets are arranged at both ends of the flexible base beam. When the flexible base beam is bent and deformed under the drive of the crankshaft, the deformation degree at both ends is relatively large, which can produce greater strain, and more charge will be generated under greater stress, thereby increasing the output of electric energy and enhancing the energy conversion efficiency. The piezoelectric sheets are arranged at both ends, so that the force on the flexible base beam can be more uniform, avoiding the problems of excessive local stress and uneven structural deformation that may be caused by the concentrated arrangement of the piezoelectric sheets in the middle of the base beam. This helps to improve the stability and reliability of the entire generator wheel structure and extend its service life. The positions of the two ends are relatively convenient for circuit connection and wiring, which facilitates the transmission of the electric energy generated by the piezoelectric sheets to the subsequent energy collection and processing circuits, reduces the complexity and interference of circuit wiring, and improves the electrical performance and reliability of the system.

[0055] Among them, the flexible base beam, as an important component of the energy capture device, provides nonlinear restoring force for the system. The relationship between the nonlinear restoring force and potential energy of the flexible base beam and the vertical displacement can be approximately expressed as:

[0056] F q (x) = k1x 3 +k2x (1)

[0057]

[0058] Where: k1 represents the nonlinear elastic coefficient of the flexible base beam, k1 = AEπ 4 / 8L 3 ; k2 represents the linear elastic coefficient, k2=D(2π 4 / L 3 )-F1(π 2 / 2L); A represents the cross-sectional area, A = bh; D represents the bending strength, D = bh 3 E / 12; L, b, h represent the length, width and height of the flexible base beam; E represents the elastic modulus; F1 represents the axial force.

[0059] Through the above relationship, we can deeply understand the mechanical properties of the flexible base beam under different vertical displacements, so as to optimize the size (such as length, width, height) and material (elastic modulus, etc.) of the base beam in the design stage to meet specific energy conversion requirements and mechanical performance indicators. For example, according to the formula, the appropriate base beam size and material parameters can be determined so that the base beam can generate sufficient nonlinear restoring force and potential energy during operation to achieve efficient energy capture and conversion.

[0060] As an implementation mode, the energy optimization module is connected to each generator wheel in the generator wheel group to extract the maximum power of the piezoelectric film.

[0061] Specifically, the energy optimization module includes an extreme value detection control unit and a maximum power point tracking unit. Due to the different bending degrees of the buckling beams distributed on each stage of the generator, the electrical responses of different piezoelectric sheets vary greatly. Therefore, a multi-source distributed hybrid capacity collection method and circuit independence technology are adopted to design a multi-source input synchronous switching inductor circuit, and the energy loss of AC-DC is reduced by optimizing the switching control strategy. An extreme value detection control unit and a corresponding maximum power point tracking unit adapted to each input energy source are independently designed to control the input of different piezoelectric beams in real time, and the long open circuit time of the series synchronous switching inductor circuit is used to achieve the maximum power extraction of different piezoelectric sheets at different times within an operating cycle.

[0062] The extreme value detection control unit is used to detect the power of the piezoelectric film, and the maximum power point tracking unit is used to capture the maximum piezoelectric film power and adjust the switch of the piezoelectric film so that when the inductor open circuit time is long, the energy is stored in the inductor and released at a preset time.

[0063] Specifically, the extreme value detection control unit monitors the power output of each piezoelectric sheet in real time and obtains real-time power data. The maximum power point tracking unit analyzes and determines the maximum power point of each piezoelectric sheet based on the information provided by the extreme value detection control unit. When it is detected that the piezoelectric sheet is working near the maximum power point, the switch state of the piezoelectric sheet is adjusted to make it enter a working mode with a long inductor open circuit time. In this working mode, when the piezoelectric sheet generates electrical energy, due to the open circuit of the inductor, the electrical energy cannot be immediately released to the load or other circuits through the inductor, but is temporarily stored in the inductor. The inductor has the characteristic of storing magnetic field energy. With the continuous input of electrical energy, the magnetic field in the inductor gradually increases and the energy is stored. When the preset time is reached or other specific conditions are met, the switch state changes again, the inductor is connected to the load or other circuit, and the energy stored in the inductor is released and supplied to the load for use or transmitted to subsequent circuits for further processing.

[0064] As an implementation mode, the energy conversion module is connected to the energy optimization module and is used to convert alternating current into direct current.

[0065] Specifically, in the process of converting the AC power generated by the piezoelectric sheet on the buckling beam into usable DC power, a rectifier bridge circuit, a filter capacitor, and a load are involved. The function of the rectifier bridge is to convert the AC voltage generated by each stage of the generator into a DC voltage. The function of the filter capacitor is to filter, converting the DC voltage with large pulsation after rectification into a relatively smooth DC voltage to supply the load. It makes the voltage waveform at both ends of the load smoother through the continuous charging and discharging process.

[0066] As an implementation mode, the energy storage module is connected to the energy conversion module for collecting electrical energy.

[0067] Specifically, the electrical response and power output generated in the generator impeller are transmitted to the distributed energy storage unit installed in the tail support frame through the positive and negative wires of the piezoelectric strain gauge for collaborative management, and finally integrated and packaged into energy storage circuit components to meet the power supply needs of the water flow detection device in actual application scenarios. Distributed power supply solves the problem that centralized power supply is prone to paralysis of the entire device due to failures, ensuring a stable supply of electricity. Multi-source energy fusion energy storage collaborative management strategy such as Figure 4 shown.

[0068] Specifically, electric energy from a plurality of generators (such as generators a, b, c, etc., up to generator k) is input as multi-source energy.

[0069] Through circuit independence technology, the output circuits of each generator are independent of each other, avoiding mutual interference between different generators; at the same time, a multi-source fusion control strategy is adopted to coordinately manage and control the input energy of multiple generators to ensure efficient fusion and utilization of energy; in addition, the extreme value detection control unit is used to detect the power of each piezoelectric sheet, and the maximum power point tracking unit captures the maximum piezoelectric sheet power according to the detection results and adjusts the switch of the piezoelectric sheet. By making the piezoelectric sheet store energy in the inductor when the inductor open circuit time is long, and releasing it at a preset time, the output energy of each generator is optimized, and the energy conversion efficiency and output power of the entire system are improved.

[0070] In the process of energy collection, the efficiency and stability of energy collection are further improved by optimizing the piezoelectric beam structure (such as the design of the flexible base beam, etc.) and adopting a hybrid energy collection method. The optimized and processed electrical energy is finally transmitted to the energy storage elements, which are integrated and packaged through storage circuits to form distributed energy storage units. Distributed energy storage units can better cope with complex and changing environments such as underground, avoid the risk of single-point energy storage failure, and ensure the stable supply and storage of electrical energy.

[0071] The entire system realizes the efficient conversion and management from multi-source energy input to sustainable power output through the multi-source energy fusion and energy storage collaborative management strategy, providing reliable power guarantee for practical application scenarios (such as power supply for downhole measurement while drilling equipment), ensuring the smooth progress of operations.

[0072] The turbine-type pipeline inflow-driven buckled beam piezoelectric energy collection device of this specific embodiment provides an innovative solution for sustainable power supply underground. Structurally, the power generation module utilizes the kinetic energy of the fluid in the pipeline, the front guide wheel guides the flow, the turbine drives the crankshaft, and the generator wheel group is eccentrically arranged. Its buckled beam deforms with the rotation of the crankshaft to generate electricity, fully tapping the fluid energy into electrical energy. The energy optimization module is connected to each generator wheel to accurately capture the maximum power of the piezoelectric sheet and reduce energy loss. The energy conversion module efficiently converts alternating current into direct current to ensure power supply stability. The distributed energy storage module can effectively collect electrical energy, cope with the complex and changeable environment underground, and avoid the risk of single-point energy storage failure. The modules work together to get rid of dependence on traditional lithium batteries, without the need for frequent replacement, reducing manpower and material costs, and continuously and stably powering equipment such as underground measurement while drilling to ensure smooth operations.

[0073] Embodiment 2

[0074] like Figure 5 As shown, this embodiment provides a method for collecting piezoelectric energy of a buckled beam driven by flow in a turbine-type pipeline, comprising the following steps:

[0075] S1: During the drilling process, the drilling fluid flows into the pipeline, passes through the front guide wheel, and impacts the turbine to rotate, and the rotating turbine drives the crankshaft to rotate;

[0076] S2: The crankshaft is rotated to drive the eccentric hub of the generator wheel to make circular motion along the pipeline axis, so that the buckled beam undergoes periodic bending deformation to generate electrical energy;

[0077] S3: The energy optimization module collects the electric energy at the maximum power of the piezoelectric sheet of the generator wheel, transmits it to the energy conversion module for AC / DC conversion, and transmits the DC power to the energy storage module for collection.

[0078] In this specific embodiment, the drilling fluid continuously flows into the pipeline, so that the front guide wheel cleverly guides the flow, impacts the turbine to rotate rapidly, and then drives the crankshaft to rotate stably, providing a power basis for subsequent power generation. The rotating crankshaft causes the eccentric hub of the generator wheel to move in a circle along the axis of the pipeline, causing the buckling beam to bend and deform periodically, generating electricity continuously. What is particularly important is that the energy optimization module accurately collects the maximum power energy of the piezoelectric film, transmits it to the energy conversion module to complete efficient AC-DC conversion, and the DC power eventually flows into the distributed energy storage module for collection. In this way, the underground is freed from the dependence on traditional power supply methods, and sustainable power supply is achieved to ensure the smooth progress of drilling operations.

[0079] The steps involved in the above embodiment 2 correspond to those in embodiment 1. For the specific implementation method, please refer to the relevant description part of embodiment 1.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device, characterized in that: It includes a power generation module, an energy optimization module, an energy conversion module and an energy storage module; The power generation module comprises a crankshaft extending along the axial direction of the pipeline, and a front guide wheel, a turbine, a generator wheel group and a rear guide wheel arranged in sequence along the axial direction and connected to the crankshaft; the front guide wheel is used to support the crankshaft and guide the fluid in the pipe, and the turbine is used to rotate its blades under the drive of the fluid and drive the crankshaft to rotate; the generator wheel group comprises a plurality of generator wheels, the rim of the generator wheel is fixedly connected to the inner wall of the pipeline, the hub is eccentrically arranged and loosely sleeved on the crankshaft, and the eccentric positions of the plurality of generator wheels are different; the spokes of the generator wheel include a plurality of buckled beams in a buckled state and in the same buckling direction, the buckled beams are composed of a flexible base beam and a piezoelectric sheet, and are used to generate electrical energy by bending and deforming when the crankshaft rotates to drive the hub of the generator wheel to make a circular motion along the axis; The energy optimization module is connected to each generator wheel in the generator wheel group and is used to extract the maximum power of the piezoelectric sheet; The energy conversion module is connected to the energy optimization module and is used to convert alternating current into direct current; The energy storage module is connected to the energy conversion module and is used to collect electric energy.

2. A turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device as claimed in claim 1, characterized in that: The rear guide wheel is used to guide the fluid out of the device; the front guide wheel and the rear guide wheel both include a plurality of blades for guiding the fluid.

3. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The rim of the front guide wheel is fixedly connected to the inner wall of the pipeline, and the bearing is hollowly sleeved on the crankshaft to support the crankshaft and guide the fluid in the pipeline.

4. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The hub of the turbine is fixedly connected to the crankshaft.

5. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The piezoelectric sheets are arranged at two ends of the flexible base beam.

6. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The nonlinear restoring force F of the flexible base beam q The relationship between (x) and potential energy U(x) and vertical displacement is expressed as: Where k1 is the nonlinear elastic coefficient of the flexible base beam, k1 = AEπ 4 / 8L 3 ; k2 is the linear elastic coefficient, k2=D(2π 4 / L 3 )-F1(π 2 / 2L); A is the cross-sectional area, A = bh; D is the bending strength, D = bh 3 E / 12; L, b, h are the length, width and height of the flexible base beam respectively; E is the elastic modulus; F1 is the axial force.

7. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The energy optimization module includes an extreme value detection control unit and a maximum power point tracking unit connected to each other; the extreme value detection control unit is used to detect the power of the piezoelectric film, and the maximum power point tracking unit is used to capture the maximum piezoelectric film power and adjust the switch of the piezoelectric film so that when the inductor open circuit time is long, energy is stored in the inductor and released at a preset time.

8. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The energy conversion module includes a rectifier bridge circuit, a filter capacitor and a load connected in sequence; the rectifier bridge circuit is used to convert the AC voltage generated by the generator wheel into a DC voltage; the filter capacitor is used to smooth the DC voltage whose pulsation amplitude exceeds a threshold and then transmit it to the load.

9. The turbine-type pipeline internal flow driven buckled beam piezoelectric energy collection device according to claim 1, characterized in that: The energy storage module is a distributed energy storage module.

10. A method for collecting piezoelectric energy of a buckled beam driven by flow in a turbine-type pipeline, using a piezoelectric energy collection device of a buckled beam driven by flow in a turbine-type pipeline as claimed in any one of claims 1 to 9, characterized in that: include: During the drilling process, the drilling fluid flows into the pipeline, passes through the front guide wheel, and impacts the turbine to rotate. The rotating turbine drives the crankshaft to rotate; The rotating crankshaft drives the eccentric hub of the generator wheel to make circular motion along the pipeline axis, causing the buckled beam to undergo periodic bending deformation to generate electrical energy; The energy optimization module collects the electrical energy of the piezoelectric sheet of the generator wheel at the maximum power, transmits it to the energy conversion module for AC / DC conversion, and transmits the DC power to the energy storage module for collection.

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