Novel pipeline flange leak detection sensor based on triboelectric nanogenerator

Abstract

The application discloses a novel pipeline flange leakage detection sensor based on friction nanometer power generation, which comprises a sensor upper shell, a sensor lower shell, a TENG sensor unit module, a sensor electronic module, a leakage port slope, a TENG sensor unit and a leakage port, the sensor upper shell and the sensor lower shell are fixed through bolts and nuts, the TENG sensor unit module is fixedly installed at the bottom of the sensor lower shell, the sensor electronic module is installed at the side of the bottom of the sensor lower shell, the leakage port slope is arranged below the TENG sensor unit module, the TENG sensor unit is fixed on the leakage port slope, and the leakage port is arranged at the bottom of the sensor lower shell. The application can detect trace leakage, achieves the purpose of real-time detection and alarm, is convenient to install and replace elements through module design, has a simple structure, is not limited in material selection, is corrosion resistant, can reduce pollution to the environment, can be compatible with a marine standard flange, and has the function of protecting the flange.

Description

TECHNICAL FIELD

[0001] The present application relates to a new type of pipeline flange leakage detection sensor based on friction nanogenerator. BACKGROUND

[0002] FPSO (Floating Production Storage and Offloading) has now become an important production tool in the field of exploiting marine energy, and has obvious advantages in economy, safety and convenience. It has gradually developed into one of the most promising marine equipment. Compared with traditional ships, FPSO has a large number of process modules, including not only oil and gas pipeline systems, but also chemical transportation pipelines such as methanol. Therefore, the construction requirements and safety standards of FPSO are relatively high compared with traditional transport ships. At the same time, in order to reduce carbon emissions, dual-fuel ships designed also use chemical fuels such as methanol and ammonia. During the design and use of the ship, the leakage prevention of the dual-fuel system is crucial. In addition, with the continuous progress of digitalization and intelligent technology, the rapid development of the Internet of Things, information technology, artificial intelligence and 5G communication technology, the entire ship field is moving towards digitalization and intelligentization. In order to actively respond to the intelligent manufacturing development plan and promote the development of intelligent ships, the development of intelligent and unmanned ships is an active change in the transformation of the ship field to the digital and intelligent era. Intelligent and unmanned ships not only need to monitor the state of equipment, but also the health status of various important system pipeline connections can also be monitored by intelligent and unmanned ships. At present, there is no special pipeline flange leakage detection sensor at home and abroad. Domestic and foreign scholars have studied various classification methods for pipeline leakage detection, such as pipeline internal fluid state detection, pipeline wall condition detection and pipeline external environment detection. They can also be classified according to different detection methods, including software-based methods and hardware-based methods. Software methods include real-time transient model method, variable statistical method, pressure point analysis, digital signal processing, etc. Hardware methods include optical fiber method, acoustic wave method, soil monitoring, ultrasonic flowmeter method, etc. The above methods all have the characteristics of lagging detection of leakage, low positioning accuracy and high cost, and need to be operated manually. SUMMARY

[0003] The purpose of the present application is to provide a new type of pipeline flange leakage detection sensor based on friction nanogenerator.

[0004] The technical scheme adopted by the present application to achieve the above-mentioned purpose is: a novel pipeline flange leakage detection sensor based on friction nanogenerator, comprising a sensor upper shell, a sensor lower shell, a TENG sensor unit module, a sensor electronic module, a leakage port slope, a TENG sensor unit and a leakage port, the sensor upper shell and the sensor lower shell are fixed by bolts and nuts, the TENG sensor unit module is fixedly installed at the bottom of the sensor lower shell, the sensor electronic module is installed on the side of the bottom of the sensor lower shell, the leakage port slope is arranged below the TENG sensor unit module, the TENG sensor unit is fixed on the leakage port slope, and the leakage port is arranged at the bottom of the sensor lower shell.

[0005] The contact surface of the sensor upper shell and the sensor lower shell is provided with a groove, and a sealing gasket is installed in the groove.

[0006] The inner surfaces of the sensor upper shell and the sensor lower shell are sprayed with a hydrophobic and oleophobic layer.

[0007] The sensor electronic module comprises a power supply module, a control unit, an acquisition module, a data processing module and a wireless transmission module, the power supply module comprises a battery and a power supply circuit, the control unit comprises a single-chip microcomputer, a control circuit and elements, the acquisition module comprises an amplification circuit, a rectification unit and a filtering unit, the acquisition module acquires an electric signal generated by the TENG sensor unit, the data processing module processes and analyzes the electric signal and sends a signal to the control unit, the control unit receives the electric signal processed by the data processing module and sends an instruction to the wireless transmission module, and the wireless transmission module performs wireless alarm transmission to a terminal machine after receiving the instruction.

[0008] The leakage port slope is provided with a groove for placing a metal copper electrode and a wire of the TENG sensor unit, the metal copper electrode is connected to one end of the wire, and the other end of the wire is connected to one pole of a sensor electronic module acquisition connector, and the other pole of the acquisition connector is grounded to a ship shell.

[0009] The surface of the metal copper electrode forms a plane with the leakage port slope.

[0010] The leakage port slope is encapsulated with a PTFE film.

[0011] The novel pipeline flange leakage detection sensor based on friction nanogenerator can detect trace leakage, achieve the purpose of real-time detection and alarm, is convenient to install and replace elements due to the modular design, has a simple structure, is not limited in material selection, is corrosion-resistant, can reduce pollution to the environment, can be compatible with a standard flange for ships, and has the function of protecting the flange. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1It is a structure schematic view of a new pipeline flange leakage detection sensor based on friction nanometer power generation of the present application.

[0013] Figure 2 It is a section view of a new pipeline flange leakage detection sensor based on friction nanometer power generation of the present application.

[0014] Figure 3 It is a working principle diagram of a new pipeline flange leakage detection sensor based on friction nanometer power generation of the present application.

[0015] Figure 4 It is a sensor electronic module circuit schematic view of a new pipeline flange leakage detection sensor based on friction nanometer power generation of the present application. DETAILED DESCRIPTION

[0016] As Figures 1 to 4As shown, the new pipeline flange leakage detection sensor based on friction nanogenerator includes a sensor upper shell 1, a sensor lower shell 2, a TENG sensor unit module 3, a sensor electronic module 4, a leakage port slope 5, a TENG sensor unit 6 and a leakage port 9, both sides of the sensor upper shell 1 and the sensor lower shell 2 are reserved with bolt holes 7, the sensor upper shell 1 and the sensor lower shell 2 are fixed on the pipeline flange through bolts and nuts, and completely wrap the pipeline flange, the TENG sensor unit module 3 is fixedly installed at the bottom of the sensor lower shell 2, the sensor electronic module 4 is installed on the side of the bottom of the sensor lower shell 2, the leakage port slope 5 is arranged below the TENG sensor unit module 3, the TENG sensor unit 6 is fixed on the leakage port slope 5, the leakage port 9 is arranged at the bottom of the sensor lower shell 2, the bottom of the sensor lower shell 2 is reserved with a bolt hole 10 for fixing the TENG sensor unit 6, the contact surface of the sensor upper shell 1 and the sensor lower shell 2 is provided with a groove for installing a sealing washer 8, the inner surfaces of the sensor upper shell 1 and the sensor lower shell 2 are sprayed with a hydrophobic and oleophobic layer, so that the leaked liquid can quickly flow to the bottom leakage port when contacting the inner surface of the shell no matter from which position it overflows, the above-mentioned sensor shell, TENG sensor unit module, TENG sensor unit and sensor electronic module can be selected from corrosion-resistant materials and can be suitable for different working conditions, the sensor upper shell and the lower shell are similar to the flange sleeve structure, the center position is a pipeline reserved opening, the contact surface of the opening and the pipeline is processed with a spiral line, and the contact surface of the shell and the pipeline is sealed by using a sealing gasket, the purpose of the spiral line is to increase the contact area of the sealing gasket and the shell, the TENG sensor unit 6 is arranged on the leakage port slope 5 of the TENG sensor unit module 3, there are two grooves for placing the copper electrodes of the TENG sensor unit, so that the surface of the copper electrode forms a plane with the slope, the positions of the two grooves are below the leakage port, so that the leaked liquid can flow through the two copper electrodes, there are grooves on the slope for placing wires, each copper electrode is connected to one end of a wire, the other end of the wire is connected to one pole of a sensor electronic module 4 collecting connector, the other pole of the collecting connector is grounded to the hull, the TENG sensor unit 6 is mainly fixed in the groove of the leakage port 5 by the copper electrode, and is made by using PU glue, the PU glue has a good thin film bonding effect, other glues with the same thin film bonding ability can also be used, the surface of the copper electrode is covered with a PTFE film, and the PTFE film is fixed by using a PTFE tape, the surface of the PTFE film has a micro-nano structure and has hydrophobicity, the entire upper surface of the leakage port slope is packaged with the PTFE film, so that the copper electrode and the wire are completely sealed and do not contact the liquid, when the fluid flows through the surface of the TENG sensor unit, the fluid contacts and rubs the PTFE film, generates induced charges, with the flow of liquid droplets, an alternating current signal is generated and transmitted to the sensor electronic module through the wire,Frictional electrification and electrostatic induction generate current, when no liquid flows through the TENG sensor unit, the TENG sensor unit is not in action, the PTFE does not generate induced charge, when there is fluid flowing through the TENG sensor unit, the PTFE generates negative charge, and the PTFE is an electret, the generated negative charge can be retained for a long time, when the liquid droplet contacts the PTFE material, the liquid droplet near the PTFE side induces positive charge, when the liquid droplet leaves the PTFE surface, an equal amount of positive charge is transferred from the ground to the copper electrode to balance the electric field accumulated on the PTFE, with the continuous falling of subsequent liquid droplets, a continuous charge transfer is formed between the copper electrode and the ship hull, and an electric current is formed in the external circuit; the PTFE film with a thickness of 50μm is selected and surface treated, the PTFE tape with a thickness of 50μm is selected, the PU glue type is HX-698, the bolt nut with M10 is used for the bolt hole 7, the screw with M6 is used for the bolt hole 10, and the hydrophobic and oleophobic coating is sprayed on the inner surface of the main shell by using FW-8800 nanometer coating,

[0017] The sensor electronic module 4 at least includes a power supply module, a control unit, an acquisition module, a data processing module and a wireless transmission module, wherein the power supply module includes a battery and a power supply circuit; the control unit includes a single-chip microcomputer, a control circuit and elements, and the single-chip microcomputer can adopt an STM32 / Raspberry Pi 3B / Raspberry Pi 3B+ model; the acquisition module includes an amplification circuit, a rectification unit and a filtering unit, the acquisition module acquires the electric signal generated by the TENG sensor unit, the data processing unit processes and analyzes the electric signal and sends the signal to the control unit, the control unit receives the electric signal processed by the data processing unit and sends an instruction to the wireless transmission module, the wireless transmission module transmits a wireless alarm to a terminal after receiving the instruction, and in operation, the liquid droplet flows through the surface of the TENG sensor unit 6, so that the liquid contacts the PTFE film to generate induced charge, and an alternating current signal is periodically formed and transmitted to the sensor electronic module through a wire, specifically, as shown in Figure 3 When the liquid droplet contacts the PTFE film for the first time, the PTFE film is negatively charged, and the liquid droplet near the PTFE film side attracts positive charge, because the PTFE is an electret, the induced charge generated on the surface can be retained for a long time, so the negative charge on the PTFE does not dissipate, when the liquid droplet leaves the PTFE film, the copper electrode transfers positive charge from the ship hull to the surface of the copper electrode to balance the electric field generated by the induced charge of the PTFE, at this time, the balance is achieved, when the second liquid droplet falls and flows through the surface of the TENG sensor unit 6, because the liquid droplet contacts the PTFE film again, positive charge is attracted near the PTFE side, so that the positive charge on the copper electrode is transferred back to the ship hull, which will generate a positive current, when the liquid again leaves the PTFE surface, the positive charge is transferred from the ship hull to the copper electrode to balance the electric field generated by the negative charge on the PTFE surface, and the voltage value again returns to balance when the liquid droplet completely leaves, and this is repeated to form a periodic alternating current signal.

Claims

1. A novel pipeline flange leak detection sensor based on frictional nanogeneration, characterized by: The sensor upper shell and the sensor lower shell are fixed by bolt and nut, the TENG sensor unit module is fixedly installed at the bottom of the sensor lower shell, the sensor electronic module is installed at the side of the bottom of the sensor lower shell, the relief port slope is arranged below the TENG sensor unit module, the TENG sensor unit is fixed on the relief port slope, and the relief port is arranged at the bottom of the sensor lower shell.

2. A novel pipeline flange leak detection sensor based on friction nanogenerator according to claim 1, characterized in that: The contact surface of the sensor upper shell and the sensor lower shell is provided with a groove, and a sealing washer is installed in the groove.

3. The novel pipeline flange leak detection sensor based on friction nanogenerator according to claim 1, characterized in that: The inner surfaces of the sensor upper shell and the sensor lower shell are sprayed with a hydrophobic and oleophobic layer.

4. The novel pipeline flange leak detection sensor based on friction nanogenerator according to claim 1, characterized in that: The sensor electronic module comprises a power supply module, a control unit, an acquisition module, a data processing module and a wireless transmission module, the power supply module comprises a battery and a power supply circuit, the control unit comprises a single-chip microcomputer, a control circuit and elements, the acquisition module comprises an amplification circuit, a rectification unit and a filtering unit, the acquisition module acquires an electric signal generated by the TENG sensor unit, the data processing module processes and analyzes the electric signal and sends a signal to the control unit, the control unit receives the electric signal processed by the data processing module and sends an instruction to the wireless transmission module, and the wireless transmission module performs wireless alarm transmission to a terminal after receiving the instruction.

5. The novel pipeline flange leak detection sensor based on friction nanogenerator according to claim 1, characterized in that: The relief port slope is provided with a groove for placing a metal copper electrode and a wire of the TENG sensor unit, the metal copper electrode is connected to one end of the wire, and the other end of the wire is connected to one pole of a sensor electronic module acquisition connector, and the other pole of the acquisition connector is grounded to a ship shell.

6. The novel pipeline flange leak detection sensor based on friction nanogenerator according to claim 5, characterized in that: The surface of the metal copper electrode forms a plane with the relief port slope.

7. The novel pipeline flange leak detection sensor based on friction nanogenerator according to claim 5, characterized in that: The relief port slope is encapsulated with a PTFE film.

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