A high-temperature-resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capturing device

Abstract

The utility model discloses a kind of high-temperature-resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capture device, including cylinder, the bottom of the cylinder is attached with conveying pipeline, the inside of the cylinder is provided with cantilever beam, the top of the cantilever beam is fixedly connected with piezoelectric layer.The utility model relates to the technical field of energy capture equipment, the high-temperature-resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capture device, by the cooperation of cantilever beam, piezoelectric layer, screw rod, mass block, heat conducting plate and pyroelectric wafer, it is realized to vibration energy as main, to pyroelectric module supplement energy brought by temperature fluctuation as auxiliary, formed the energy supply mode of "primary and secondary coordination", significantly improved the energy acquisition stability under high-temperature complex environment, avoided the short board of traditional power supply mode in high-temperature oil and gas pipeline environment, provided stable, safe and sustainable energy support for pipeline monitoring equipment.

Description

Technical Field

[0001] This utility model relates to the field of energy harvesting equipment technology, specifically a high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device. Background Technology

[0002] Online monitoring systems for oil / gas pipelines are an important technical means to ensure the safe and stable operation of pipelines. Through various sensors and advanced technologies, they collect and analyze pipeline operation data in real time and promptly identify potential hazards.

[0003] Traditional online monitoring systems for oil / gas pipelines typically use batteries or wire connections for power to ensure their normal operation. However, in actual use, due to the high temperature of the outer wall of oil / natural gas pipelines, traditional batteries may not be able to work for a long time in high-temperature environments. High-temperature environments may cause battery failure, or even cause explosions and fires. If wired power supply is used, staff may not be able to avoid the problem of difficult wiring in harsh environments. If energy harvesters are chosen for self-powered operation, high-temperature environments may reduce the efficiency of energy harvesters. Furthermore, no single power supply method can guarantee the stability of power supply. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device. This solves the problem that in practical applications, due to the excessively high outer wall temperature of oil / natural gas pipelines, traditional batteries may not be able to operate for extended periods in high-temperature environments, and these high temperatures could lead to battery failure, or even explosions and fires. If wired power supply is used, workers may face difficulties in wiring in harsh environments. If a self-powered energy harvester is chosen, high temperatures may reduce its efficiency, and no single power supply method can guarantee stable power supply.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device, comprising a cylindrical body, a conveying pipeline attached to the bottom of the cylindrical body, a cantilever beam disposed inside the cylindrical body, a piezoelectric layer fixedly connected to the top of the cantilever beam, a fixing layer fixedly connected to the bottom of the cantilever beam, a screw threadedly connected to the end of the cantilever beam, a mass block fixedly connected to the bottom of the screw, a square hole disposed below the mass block, the square hole being opened at the bottom of the cylindrical body, a heat-conducting plate fixedly connected to the inner wall of the square hole, the bottom of the heat-conducting plate attached to the outer wall of the conveying pipeline, and a pyroelectric crystal fixedly connected to the top of the heat-conducting plate.

[0006] Preferably, a support column is fixedly connected to the bottom of the fixing layer, an insulating gasket is fixedly connected to the bottom of the support column, a support base is fixedly connected to the bottom of the insulating gasket, the side wall of the support base is attached to the inner wall of the cylinder, a connecting hole is opened on the side of the inner wall of the cylinder near the support base, a bolt is inserted into the inner wall of the connecting hole, the bolt passes through the side wall of the support base and extends to the outside of the cylinder, a nut is threaded onto the outer wall of the bolt, and the side wall of the nut abuts against the side wall of the cylinder.

[0007] Preferably, a protective mesh is fitted onto the outer wall of the nut, and the protective mesh is fixedly connected to the outer wall of the cylinder.

[0008] Preferably, an energy conversion and storage module is fixedly connected to the inner wall of the cylinder, and the output end of the energy conversion and storage module extends to the outside of the cylinder.

[0009] Preferably, a connecting seat is provided above the conveying pipe, the inner wall of the connecting seat is fixedly connected to the outer wall of the cylinder, a clamp is inserted into the top of the connecting seat, and the outer wall of the clamp is attached to the outer wall of the conveying pipe.

[0010] This invention provides a high-temperature resistant piezoelectric-pyroelectric dual-mode energy harvesting device for oil and gas pipelines. It offers the following advantages: This high-temperature resistant piezoelectric-pyroelectric dual-mode energy harvesting device, through the cooperation of a cantilever beam, piezoelectric layer, screw, mass block, heat-conducting plate, and pyroelectric crystal, achieves a "primary and secondary synergistic" energy supply mode, primarily utilizing vibration energy supplemented by pyroelectric modules to address energy fluctuations caused by temperature variations. This significantly improves the stability of energy acquisition in high-temperature and complex environments, avoids the shortcomings of traditional power supply methods in high-temperature oil and gas pipeline environments, and provides stable, safe, and sustainable energy support for pipeline monitoring equipment.

[0011] By using the combination of support columns, insulating gaskets, support bases, connecting holes, bolts, and nuts, the position of the cantilever beam can be adjusted to ensure sufficient safety clearance and prevent the piezoelectric module from colliding with the inner wall of the housing or other components during vibration. This prevents mechanical interference from causing a decrease in energy conversion efficiency or structural damage, and greatly improves the stability of the device operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure; Figure 3 for Figure 1 Schematic diagram of the cantilever beam, piezoelectric layer, and fixing layer; Figure 4for Figure 1 A schematic diagram of the structure of the central support, connecting holes, and bolts.

[0013] In the diagram: 1. Cylinder; 2. Conveying pipe; 3. Cantilever beam; 4. Piezoelectric layer; 5. Fixing layer; 6. Screw; 7. Mass block; 8. Square hole; 9. Heat-conducting plate; 10. Pyroelectric crystal; 11. Support column; 12. Insulating gasket; 13. Support base; 14. Connecting hole; 15. Bolt; 16. Nut; 17. Protective net; 18. Energy conversion and storage module; 19. Connecting base; 20. Clamp. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In actual use, due to the excessively high temperature of the outer wall of oil / natural gas pipelines, traditional batteries may not be able to work for a long time in high-temperature environments. Furthermore, high-temperature environments may cause battery failure or even explosions and fires. If wired power supply is used, workers may not be able to avoid the problem of difficult wiring in harsh environments. If energy harvesters are chosen for self-powering, high-temperature environments may reduce the efficiency of the energy harvesters. Moreover, no single power supply method can guarantee the stability of power supply.

[0016] In view of this, the present invention provides a high-temperature resistant piezoelectric-pyroelectric dual-mode energy harvesting device for oil and gas pipelines. This high-temperature resistant piezoelectric-pyroelectric dual-mode energy harvesting device for oil and gas pipelines, through the cooperation of a cantilever beam, a piezoelectric layer, a screw, a mass block, a heat-conducting plate, and a pyroelectric crystal, achieves a "primary and secondary synergistic" energy supply mode, which mainly uses vibration energy and supplements the energy brought by temperature fluctuations with the pyroelectric module. This significantly improves the stability of energy acquisition in high-temperature and complex environments, avoids the shortcomings of traditional power supply methods in high-temperature oil and gas pipeline environments, and provides stable, safe, and sustainable energy support for pipeline monitoring equipment.

[0017] Those skilled in the art will connect the electrical components and their compatible power supplies in this case using wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle below, where the electrical components are connected in the order of operation. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, without further explanation of electrical control.

[0018] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0019] Example 1, by Figure 1-4 It is known that a high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device includes a cylinder 1, a conveying pipe 2 attached to the bottom of the cylinder 1, a cantilever beam 3 arranged inside the cylinder 1, a piezoelectric layer 4 fixedly connected to the top of the cantilever beam 3, a fixing layer 5 fixedly connected to the bottom of the cantilever beam 3, a screw 6 threadedly connected to the end of the cantilever beam 3, a mass block 7 fixedly connected to the bottom of the screw 6, a square hole 8 arranged below the mass block 7, the square hole 8 is opened at the bottom of the cylinder 1, a heat-conducting plate 9 fixedly connected to the inner wall of the square hole 8, the bottom of the heat-conducting plate 9 attached to the outer wall of the conveying pipe 2, and a pyroelectric crystal 10 fixedly connected to the top of the heat-conducting plate 9. In the specific implementation process, it is worth noting that the cylinder 1 adopts a double-layer cylindrical design, which can be made of 2mm thick 304 stainless steel, with a 1mm mica insulation layer lining the inner layer, enabling the overall temperature resistance to reach 150℃. A sealing cap is fixed to the top of the cylinder 1 with screws to protect its internal structure. The cantilever beam 3 is a 60mm long 0.3mm beryllium bronze substrate, serving a supporting function. A 20μm thick lanthanum-doped lead magnesium magnesium niobate ferroelectric film is pasted on the upper surface of the cantilever beam 3 as a piezoelectric layer 4, and the lower surface uses aluminum silicate ceramic adhesive resistant to 300℃ as a fixing layer 5. The end of the cantilever beam 3 is connected to a 15mm*3 tungsten alloy mass block 7 via an M3 stainless steel screw 6. In actual use, the operator adjusts the screw... 6 allows the system's resonant frequency to match the 5-35Hz pipeline vibration frequency band. This adjustment only requires a single calibration during the initial installation of the device. Unless there are significant changes in pipeline operating conditions (such as permanent flow rate adjustments or major pipeline modifications), no further adjustment is needed. The adjustment is simple: just use a small wrench to hold the screw 6, rotate it to move the screw 6 at the end of the cantilever beam 3, thereby moving the mass block 7 up and down. This adjustment method does not increase the burden of daily maintenance, and the screw 6 allows the device to adapt to various pipeline scenarios, avoiding customization costs. Simultaneously, frequency matching maximizes energy conversion efficiency. A square hole 8 is opened at the bottom of the cylinder 1, and the heat-conducting plate 9 is fixed to the inner wall of the square hole 8 with silicone sealant, and also... The ketone adhesive is directly bonded to the outer wall of the conveying pipe 2. The heat-conducting plate 9 is made of 50*50*1mm anodized aluminum, and a 20×20×0.1mm lithium tantalate (LiTaO3) crystal is pasted on the inner side of the heat-conducting plate 9 as a pyroelectric material. The pyroelectric crystal 10 is plated with 100nm gold electrodes on both sides. This module is kept at a certain distance from the vibration energy capture module to avoid mutual interference. In actual operation, the pipe vibration drives the mass block 7 to generate inertial force, the mass block 7 drives the screw 6 to move, the screw 6 drives the cantilever beam 3 to bend, causing the piezoelectric layer 4 to deform and generate piezoelectric charge. The pipe temperature change is transmitted through the heat-conducting plate 9, causing the surface of the pyroelectric crystal 10 to generate charge. The two charges are connected in parallel through polyimide insulated wires and connected to the LT3588 full-bridge rectifier. The circuit converts the current into DC and stores it in a 5.5V / 0.47F supercapacitor, ultimately stabilizing the output to 3.3V DC. Among them, the piezoelectric layer 4 retains more than 92% of its piezoelectric performance at 150℃, and the pyroelectric crystal 10 has a pyroelectric coefficient of 190μC / m2·K at the same temperature. It realizes dual-mode collaborative operation and stable operation in high-temperature environments, which greatly improves the operational stability of the device. Furthermore, when the pipeline is stopped and there is no vibration, the pyroelectric module can still maintain a certain basic power supply. This is because oil pipelines are usually exposed to environments with certain temperature fluctuations. Due to the diurnal temperature difference, weather changes, or the influence of nearby equipment such as the start and stop of pumps and valves, the pipe wall temperature may change in a short time, which further improves the operational stability. Furthermore, a support column 11 is fixedly connected to the bottom of the fixed layer 5, an insulating gasket 12 is fixedly connected to the bottom of the support column 11, a support base 13 is fixedly connected to the bottom of the insulating gasket 12, the side wall of the support base 13 is attached to the inner wall of the cylinder 1, a connection hole 14 is opened on the side of the inner wall of the cylinder 1 near the support base 13, a bolt 15 is inserted into the inner wall of the connection hole 14, the bolt 15 penetrates the side wall of the support base 13 and extends to the outside of the cylinder 1, a nut 16 is threadedly connected to the outer wall of the bolt 15, and the side wall of the nut 16 is pressed against the side wall of the cylinder 1. In the specific implementation process, it is worth noting that the support column 11 is generally similar to a quadrangular prism, and its material can be stainless steel. The insulating gasket 12 is generally similar to a square plate, and its material can be mica to further enhance insulation and prevent the outer shell of the cylinder 1 from forming a conductive path with the cantilever beam 3, ensuring that the piezoelectric charge can be effectively output to the rectifier circuit through the wire. The support base 13 is generally similar to a 'T' shape, and its side wall is provided with two circular through holes. The side wall of the cylinder 1 has multiple connecting holes 14, which are circular. The specific number of connecting holes 14 is not limited, as long as it meets the working requirements. The size of the connecting holes 14 is the same as the through holes on the side wall of the support base 13, and the two are connected. The bolts 15 are made of stainless steel and can pass through the connecting holes 14 on the side wall of the support base 13 and the cylinder 1, and extend to the outside. The support base 13 and the cylinder 1 are fixed by nuts 16, which are also made of stainless steel. In actual use, when it is necessary to adjust the height of the cantilever beam 3, the operator opens the sealing cover at the top of the cylinder 1, holds the nut 16 against it, and uses a tool to rotate the bolt 15 clockwise so that the bolt 15 gradually moves away from the nut 16, the connecting hole 14, and the support seat 13. After the bolt 15 is removed, the operator moves the support seat 13 along the connecting hole 14 on the side wall of the cylinder 1. The support seat 13 drives the cantilever beam 3 to move through the insulating gasket 12, the support column 11, and the fixing layer 5, thereby adjusting the height of the cantilever beam 3 and thus adjusting the height of the mass block 7. This prevents the piezoelectric module from colliding with the inner wall of the outer shell or other components during vibration, thereby preventing the energy conversion efficiency from decreasing or the structure from being damaged due to mechanical interference, and greatly improving the stability of the device operation. After the adjustment is completed, the above actions are reversed, and the two bolts 15 are inserted into the connecting hole 14 at the new position and fixed with the nut 16. Furthermore, a protective net 17 is fitted onto the outer wall of the nut 16, and the protective net 17 is fixedly connected to the outer wall of the cylinder 1. In the specific implementation process, it is worth noting that the protective net 17 consists of a fixing plate and a filter screen, which is fixed to the outer wall of the cylinder 1 by screws. The fixing plate is made of stainless steel and is similar to a rectangular plate. The filter screen is also made of stainless steel, and its mesh size can be selected according to actual needs to meet the working requirements. For example, it can be 20-40 mesh. The protective net 17 can prevent foreign objects from entering the interior of the cylinder 1 through the connection hole 14, protect the components inside the cylinder 1, and improve the service life and working stability of the high temperature piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capture device. Example 2, by Figure 1-4 It can be seen that an energy conversion and storage module 18 is fixedly connected to the inner wall of the cylinder 1, and the output end of the energy conversion and storage module 18 extends to the outside of the cylinder 1. In the specific implementation process, it is worth noting that the energy conversion and storage module 18 includes, but is not limited to, the LT3588 full-bridge rectifier circuit and the 5.5V / 0.47F supercapacitor mentioned above. It is a general term for the energy conversion structure, energy storage structure and energy transmission structure. The specific structure is not limited, as long as it meets the requirements for operation. Furthermore, the top of the piezoelectric layer 4 and the gold electrodes on both sides of the pyroelectric wafer 10 are electrically connected to the energy conversion and storage module 18 through wires. The length of the wires is not limited, as long as it meets the requirements for operation. This ensures the operational stability of the high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capture device structure. Furthermore, a connecting seat 19 is provided above the conveying pipe 2. The inner wall of the connecting seat 19 is fixedly connected to the outer wall of the cylinder 1. A clamp 20 is inserted into the top of the connecting seat 19, and the outer wall of the clamp 20 is attached to the outer wall of the conveying pipe 2. In the specific implementation process, it is worth noting that the connecting seat 19 is generally similar to a ring shape and is fixed to the lower outer wall of the cylinder 1. Its material can be stainless steel, and its top is provided with multiple circular through holes. The clamp 20 is U-shaped and is also made of stainless steel. A rubber pad is added to its inner side to increase the friction with the conveying pipe 2. The two ends of the clamp 20 are respectively inserted into the two circular through holes on the top of the connecting seat 19 and fixed with stainless steel locking nuts. This provides support for the entire high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capture device and is also very convenient to install, thereby improving the ease of installation of the high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy capture device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device, comprising a cylindrical body (1), characterized in that: The bottom of the cylinder (1) is attached to a conveying pipe (2). A cantilever beam (3) is provided inside the cylinder (1). A piezoelectric layer (4) is fixedly connected to the top of the cantilever beam (3). A fixing layer (5) is fixedly connected to the bottom of the cantilever beam (3). A screw (6) is threaded to the end of the cantilever beam (3). A mass block (7) is fixedly connected to the bottom of the screw (6). A square hole (8) is provided below the mass block (7). The square hole (8) is opened at the bottom of the cylinder (1). A heat-conducting plate (9) is fixedly connected to the inner wall of the square hole (8). The bottom of the heat-conducting plate (9) is attached to the outer wall of the conveying pipe (2). A pyroelectric crystal (10) is fixedly connected to the top of the heat-conducting plate (9).

2. The high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device according to claim 1, characterized in that: The bottom of the fixed layer (5) is fixedly connected to a support column (11), the bottom of the support column (11) is fixedly connected to an insulating gasket (12), the bottom of the insulating gasket (12) is fixedly connected to a support seat (13), the side wall of the support seat (13) is attached to the inner wall of the cylinder (1), a connecting hole (14) is provided on the side of the inner wall of the cylinder (1) near the support seat (13), a bolt (15) is inserted into the inner wall of the connecting hole (14), the bolt (15) penetrates the side wall of the support seat (13) and extends to the outside of the cylinder (1), a nut (16) is threaded onto the outer wall of the bolt (15), and the side wall of the nut (16) is pressed against the side wall of the cylinder (1).

3. The high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device according to claim 2, characterized in that: The outer wall of the nut (16) is fitted with a protective net (17), which is fixedly connected to the outer wall of the cylinder (1).

4. The high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device according to claim 1, characterized in that: An energy conversion and storage module (18) is fixedly connected to the inner wall of the cylinder (1), and the output end of the energy conversion and storage module (18) extends to the outside of the cylinder (1).

5. The high-temperature resistant piezoelectric-pyroelectric dual-mode oil and gas pipeline energy harvesting device according to claim 1, characterized in that: A connecting seat (19) is provided above the conveying pipe (2). The inner wall of the connecting seat (19) is fixedly connected to the outer wall of the cylinder (1). A clamp (20) is inserted into the top of the connecting seat (19). The outer wall of the clamp (20) is attached to the outer wall of the conveying pipe (2).

Images