Pipeline protection device and pipeline drainage system

Abstract

The utility model discloses a pipeline protection device and a pipeline drainage system. The pipeline protection device comprises an acquisition module, a main control module and a switch module, the pipeline is provided with a solid-state decoupler, and the solid-state decoupler is connected between the pipeline and the grounding end; the acquisition module is connected with the solid-state decoupler, and the acquisition module is used for acquiring voltages at two ends of the solid-state decoupler and generating a first acquisition signal and a second acquisition signal; the main control module is connected with the acquisition module, and the main control module is used for determining the fault state of the solid-state decoupler according to the difference between the first acquisition signal and the second acquisition signal; the switch module is connected between the solid-state decoupler and the grounding end, the control end of the switch module is connected with the main control module, and the switch module is used for cutting off the connection between the solid-state decoupler and the grounding end according to the fault state of the solid-state decoupler. The pipeline protection device provided by the utility model can cut off the connection between the solid-state decoupler and the grounding end in time when the solid-state decoupler fails.

Description

Technical Field

[0001] This utility model relates to the field of circuit design technology, and in particular to a pipe protection device and a pipe drainage system. Background Technology

[0002] Over long-term use, pipeline drainage systems can experience electrochemical corrosion due to factors such as soil environment and stray currents. The function of a pipeline drainage system is to protect the pipeline from corrosion by guiding stray currents on the pipeline to drainage devices on the ground.

[0003] Currently, pipeline drainage systems utilize solid-state decouplers connected to the pipelines to provide a low-impedance path for alternating current (AC), allowing coupled AC current to flow smoothly through and drain into the ground. This reduces the accumulation of stray AC current in the pipeline and, within a certain voltage range, prevents the conduction of direct current (DC), avoiding the loss of cathodic protection current and preventing electrolytic corrosion of pipelines and other facilities by DC current. However, when the solid-state decoupler fails, the pipeline connects to the grounding terminal, causing accelerated loss of cathodic protection current and exacerbating corrosion. Utility Model Content

[0004] This invention provides a pipeline protection device and a pipeline drainage system to solve the problem in the prior art where accelerated loss of cathodic protection current in pipelines leads to increased corrosion when a solid-state decoupler fails.

[0005] According to one aspect of this utility model, a pipeline protection device is provided, including a data acquisition module, a main control module, and a switch module;

[0006] The pipeline is equipped with a solid-state decoupler, which is connected between the pipeline and the grounding terminal.

[0007] The acquisition module is connected to the solid-state decoupler. The acquisition module is used to acquire the voltage across the solid-state decoupler and generate a first acquisition signal and a second acquisition signal.

[0008] The main control module is connected to the acquisition module, and the main control module is used to determine the fault state of the solid-state decoupler based on the difference between the first acquisition signal and the second acquisition signal.

[0009] The switch module is connected between the solid-state decoupler and the ground terminal. The control terminal of the switch module is connected to the main control module. The switch module is used to disconnect the solid-state decoupler from the ground terminal according to the fault state of the solid-state decoupler.

[0010] Optionally, the switching module includes an isolation unit and a switching unit. The first end of the input side of the isolation unit is connected to the output end of the main control module, and the second end of the input side of the isolation unit is grounded. The first end of the output side of the isolation unit is connected to the control end of the switching unit, and the second end of the output side of the isolation unit is grounded. The isolation unit is used to isolate and transmit the signal output by the main control module to the switching unit. The first end of the switching unit is connected to the solid-state decoupler, and the second end of the switching unit is connected to the grounding end. The switching unit is used to disconnect the solid-state decoupler from the grounding end when the fault state of the solid-state decoupler is a short-circuit fault.

[0011] Optionally, the isolation unit includes an optocoupler switch, with a first terminal on the input side of the optocoupler switch connected to the output terminal of the main control module, a second terminal on the input side of the optocoupler switch grounded, a first terminal on the output side of the optocoupler switch connected to the control terminal of the switch unit, and a second terminal on the output side of the optocoupler switch grounded.

[0012] Optionally, the isolation unit further includes a first Zener diode, the first end of which is connected to the first end of the output side of the optocoupler switch, and the second end of which is connected to the first power supply terminal.

[0013] Optionally, the switching unit includes a relay, a first end of the relay coil is connected to a first power supply terminal, a second end of the relay coil is connected to a first end of the output side of the optocoupler switch, a first end of the normally closed contact of the relay is connected to the solid-state decoupler, and a second end of the normally closed contact of the relay is grounded.

[0014] Optionally, the acquisition module includes a first acquisition unit and a second acquisition unit. The input terminal of the first acquisition unit is connected to a first node connecting the pipe and the solid-state decoupler, and the output terminal of the first acquisition unit is connected to the main control module. The first acquisition unit is used to acquire the voltage of the first node and output a first acquisition signal based on the voltage of the first node. The input terminal of the second acquisition unit is connected to the ground terminal of the solid-state decoupler, and the output terminal of the second acquisition unit is connected to the main control module. The second acquisition unit is used to acquire the voltage of the ground terminal of the solid-state decoupler and output a second acquisition signal based on the voltage of the ground terminal of the solid-state decoupler.

[0015] Optionally, the acquisition module further includes a third acquisition unit, the input terminal of which is connected to a reference electrode, and the output terminal of which is connected to the main control module. The third acquisition unit is used to acquire the voltage of the reference electrode and output a third acquisition signal based on the voltage of the reference electrode. The main control module is also used to determine the difference between the first acquisition signal and the second acquisition signal based on the difference between the first acquisition signal and the third acquisition signal, and the difference between the second acquisition signal and the third acquisition signal.

[0016] Optionally, the first acquisition unit includes a first operational amplifier, a first capacitor, a second capacitor, and a first resistor. The non-inverting input of the first operational amplifier is connected to the input of the first acquisition unit. The inverting input of the first operational amplifier is connected to a second power supply terminal. The power supply terminal of the first operational amplifier is connected to a third power supply terminal and a first terminal of the first capacitor. The second terminal of the first capacitor is grounded. The ground terminal of the first operational amplifier is grounded. The output of the first operational amplifier is connected to its inverting input and a first terminal of the first resistor. The second terminal of the first resistor is connected to the first terminal of the second capacitor and the output of the first acquisition unit. The second terminal of the second capacitor is grounded. The second acquisition unit includes a second operational amplifier, a third capacitor, a fourth capacitor, and a second resistor. The non-inverting input of the second operational amplifier is connected to the input of the second acquisition unit. The inverting input of the second operational amplifier is connected to the second power supply terminal. The power supply terminal of the second operational amplifier is connected to the third power supply terminal and the first terminal of the third capacitor. The second terminal of the third capacitor is grounded. The ground terminal of the second operational amplifier is grounded. The output terminal of the second operational amplifier is connected to the inverting input terminal of the second operational amplifier and the first terminal of the second resistor. The second terminal of the second resistor is connected to the first terminal of the fourth capacitor and the output terminal of the second acquisition unit. The second terminal of the fourth capacitor is grounded. The third acquisition unit includes a third operational amplifier, a fifth capacitor, and a third resistor. The non-inverting input terminal of the third operational amplifier is connected to the input terminal of the third acquisition unit. The inverting input terminal of the third operational amplifier is connected to the second power supply terminal. The output terminal of the third operational amplifier is connected to the inverting input terminal of the third operational amplifier and the first terminal of the third resistor. The second terminal of the third resistor is connected to the first terminal of the fifth capacitor and the output terminal of the third acquisition unit. The second terminal of the fifth capacitor is grounded.

[0017] Optionally, the pipeline protection device further includes a power conversion module, which includes a first voltage conversion chip, a second voltage conversion chip, and a third voltage conversion chip. The input terminal of the first voltage conversion chip is connected to a first power supply terminal, the output terminal of the first voltage conversion chip is connected to the third power supply terminal and the input terminal of the second voltage conversion chip, the output terminal of the second voltage conversion chip is connected to a fourth power supply terminal and the input terminal of the third voltage conversion chip, and the output terminal of the third voltage conversion chip is connected to the second power supply terminal.

[0018] According to another aspect of the present invention, a pipe drainage system is provided, including the aforementioned pipe protection device.

[0019] The technical solution of this utility model embodiment includes a pipeline protection device comprising a data acquisition module, a main control module, and a switch module. A solid-state decoupler is installed on the pipeline and connected between the pipeline and a grounding terminal. The data acquisition module is connected to the solid-state decoupler and is used to acquire the voltage across the solid-state decoupler and generate a first acquisition signal and a second acquisition signal. The main control module is connected to the data acquisition module and is used to determine the fault state of the solid-state decoupler based on the difference between the first and second acquisition signals. The switch module is connected between the solid-state decoupler and the grounding terminal, and its control terminal is connected to the main control module. The switch module is used to disconnect the solid-state decoupler from the grounding terminal based on the fault state of the solid-state decoupler. When the solid-state decoupler fails, the connection between the pipeline and the grounding terminal is closed, causing the pipeline cathodic protection current to leak. Because the switch module is located between the solid-state decoupler and the grounding terminal, when the main control module detects a solid-state decoupler fault, it controls the switch module to disconnect the solid-state decoupler from the grounding terminal, thus disconnecting the pipeline from the grounding terminal and preventing the leakage of the pipeline cathodic protection current. This solves the problem in the prior art where accelerated leakage of the pipeline cathodic protection current leads to increased corrosion when the solid-state decoupler fails.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a structural schematic diagram of a pipeline protection device provided in an embodiment of this utility model;

[0023] Figure 2 This is a circuit diagram of a pipeline protection device provided in an embodiment of this utility model;

[0024] Figure 3 This is a circuit diagram of another pipeline protection device provided in this embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of another pipeline protection device provided in an embodiment of the present invention;

[0026] Figure 5 This is a circuit diagram of the power conversion module provided in an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of a pipe drainage system provided in an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] This utility model provides a pipeline protection device. Figure 1 This is a structural schematic diagram of a pipeline protection device provided in an embodiment of this utility model, as shown below. Figure 1As shown, the pipeline protection device 100 includes a data acquisition module 110, a main control module 120, and a switch module 130. A solid-state decoupler B is installed on pipeline A, connected between pipeline A and the grounding terminal GND. The data acquisition module 110 is connected to the solid-state decoupler B and is used to acquire the voltage across the solid-state decoupler B, generating a first acquisition signal and a second acquisition signal. The main control module 120 is connected to the data acquisition module 110 and is used to determine the fault state of the solid-state decoupler B based on the difference between the first and second acquisition signals. The switch module 130 is connected between the solid-state decoupler B and the grounding terminal GND. The control terminal a of the switch module 130 is connected to the main control module 120, and the switch module 130 is used to disconnect the solid-state decoupler B from the grounding terminal GND based on the fault state of the solid-state decoupler B.

[0031] In this embodiment of the utility model, the pipeline protection device 100 is a device that protects the pipeline from damage caused by various factors and ensures the safe and stable operation of the pipeline. Pipeline A is an underground pipeline facility used for long-distance transportation of various media. During long-term use, electrochemical corrosion will occur due to the influence of soil environment, stray current, and other factors. The solid-state decoupler B is a device that uses solid-state electronic technology to achieve DC isolation and AC conduction. By guiding stray current on the pipeline to a drainage device on the ground, it protects the pipeline from corrosion. The acquisition module 110 acquires the voltage at the connection between the solid-state decoupler and the pipeline, i.e., the voltage at the first end of the solid-state decoupler, and the voltage at the connection between the solid-state decoupler and the grounding terminal, i.e., the voltage at the grounding terminal of the solid-state decoupler. The main control module 120 is a module that performs data storage, calculation, and other processing on the acquisition signals output by the acquisition module and outputs control signals. The switch module 130 is a module that disconnects the connection between the solid-state decoupler B and the grounding terminal GND according to the control signal output by the main control module 120. For example, the switch module 130 includes a switch element.

[0032] In this embodiment of the invention, the solid-state decoupler B, under normal operating conditions, acts like a large capacitor, draining stray AC current from the pipeline to the ground while preventing DC current conduction, thus avoiding the loss of cathodic protection current. Under fault conditions, the solid-state decoupler B acts like a wire, directly connecting the pipeline to the grounding terminal. The acquisition module 110 acquires the voltage across the solid-state decoupler and outputs a first acquisition signal based on the voltage at the first terminal and a second acquisition signal based on the voltage at the grounding terminal. The main control module 120 determines the fault state of the solid-state decoupler based on the difference between the first and second acquisition signals. For example, when the difference between the first and second acquisition signals is zero, the solid-state decoupler is determined to be faulty, and the control signal output by the main control module 120 is a high-level signal. The switch module 120 disconnects based on the high-level signal output by the main control module 120, thus cutting off the connection between the solid-state decoupler B and the grounding terminal GND. This prevents the loss of cathodic current in the pipeline and ensures safe pipeline operation.

[0033] In this embodiment, the pipeline protection device includes a data acquisition module, a main control module, and a switch module. A solid-state decoupler is installed on the pipeline, connected between the pipeline and a grounding terminal. The data acquisition module is connected to the solid-state decoupler and is used to acquire the voltage across the solid-state decoupler, generating a first acquisition signal and a second acquisition signal. The main control module is connected to the data acquisition module and is used to determine the fault state of the solid-state decoupler based on the difference between the first and second acquisition signals. The switch module is connected between the solid-state decoupler and the grounding terminal, and its control terminal is connected to the main control module. The switch module is used to disconnect the solid-state decoupler from the grounding terminal based on the fault state of the solid-state decoupler. Since a fault in the solid-state decoupler can easily connect the pipeline to the grounding terminal, leading to current loss in the pipeline cathodic protection system, this embodiment places the switch module between the solid-state decoupler and the grounding terminal. When the main control module detects a fault in the solid-state decoupler, it controls the switch module to disconnect, thus disconnecting the solid-state decoupler from the grounding terminal, i.e., disconnecting the pipeline from the grounding terminal. This design avoids the loss of cathode current in the pipeline, solving the problem in existing technologies where accelerated loss of cathode protection current leads to increased corrosion when the solid-state decoupler fails.

[0034] Figure 2 This is a circuit diagram of a pipeline protection device provided in an embodiment of this utility model, such as... Figure 2As shown, the switching module 130 includes an isolation unit 131 and a switching unit 132. The first end of the input side of the isolation unit 131 is connected to the output end of the main control module 120, and the second end of the input side of the isolation unit 131 is grounded. The first end of the output side of the isolation unit 131 is connected to the control end of the switching unit 132, and the second end of the output side of the isolation unit 131 is grounded. The isolation unit 131 is used to isolate and transmit the signal output by the main control module 120 to the switching unit 132. The first end of the switching unit 132 is connected to the solid-state decoupler B, and the second end of the switching unit 132 is connected to the ground terminal GND. The switching unit 132 is used to disconnect the solid-state decoupler B from the ground terminal GND when the fault state of the solid-state decoupler B is a short-circuit fault.

[0035] In this embodiment of the invention, the isolation unit 131 is a unit that achieves electrical isolation and ensures effective signal transmission. It can ensure electrical safety and improve anti-interference capability. The switching unit 132 is a unit that disconnects the solid-state decoupler from the ground terminal based on the fault state of the solid-state decoupler. Based on the above embodiment, the acquisition module 110 acquires the voltage across the solid-state decoupler and outputs a first acquisition signal based on the voltage at the first terminal of the solid-state decoupler, and outputs a second acquisition signal based on the voltage at the ground terminal of the solid-state decoupler. When the difference between the first acquisition signal and the second acquisition signal is zero, the main control module 120 determines that the solid-state decoupler is in a fault state and outputs a high-level signal. The isolation unit 131 transmits the high-level signal to the control terminal of the switching unit 132 in isolation. The switching unit 132 disconnects the solid-state decoupler B from the ground terminal GND based on the high-level signal output by the main control module 120, avoiding the loss of cathode current in the pipeline and ensuring the safe operation of the pipeline.

[0036] Specifically, the isolation unit 131 includes an optocoupler switch OC1. The first end of the input side of the optocoupler switch OC1 is connected to the output end of the main control module 120, the second end of the input side of the optocoupler switch OC1 is grounded, the first end of the output side of the optocoupler switch OC1 is connected to the control end of the switching unit 130, and the second end of the output side of the optocoupler switch OC1 is grounded.

[0037] In this embodiment of the invention, when the main control module 120 outputs a high-level signal, the first terminal of the input side of the optocoupler switch OC1 is connected to the high-level signal, and the light-emitting diode on the input side of the optocoupler switch OC1 is turned on. The first and second terminals of the output side of the optocoupler switch OC1 are connected, and the first terminal of the output side of the optocoupler switch OC1 outputs a low-level signal. The switching unit disconnects the solid-state decoupler B from the ground terminal GND according to the low-level signal output by the optocoupler switch OC1.

[0038] Based on the above embodiments, the isolation unit 131 further includes a first Zener diode D1, the first end of which is connected to the first end of the output side of the optocoupler switch OC1, and the second end of which is connected to the first power supply terminal V1.

[0039] Based on the above embodiment, when the main control module 120 detects that the difference between the first acquisition signal and the second acquisition signal is greater than a set value, the main control module 120 determines that the solid-state decoupler is in a normal state and outputs a low-level signal. A low-level signal is connected to the first terminal of the input side of the optocoupler switch OC1, and the light-emitting diode on the input side of the optocoupler switch OC1 is in a turned-off state. The first terminal of the output side of the optocoupler switch OC1 is connected to the first power supply terminal V1 through the first Zener diode D1, and outputs a high-level signal. The switching unit does not operate based on the high-level signal output by the optocoupler switch OC1, maintaining the connection between the solid-state decoupler B and the ground terminal GND. The first Zener diode has a voltage stabilizing function, keeping the voltage output from the first terminal of the output side of the optocoupler switch OC1 at a high level.

[0040] Specifically, the switching unit 132 includes a relay K1. The first end of the coil of the relay K1 is connected to the first power supply terminal V1. The second end of the coil of the relay K1 is connected to the first end of the output side of the optocoupler switch OC1. The first end of the normally closed contact of the relay K1 is connected to the solid-state decoupler B. The second end of the normally closed contact of the relay K1 is grounded.

[0041] Based on the above embodiments, the switch module 130 further includes a third interface J3. The first end of the normally closed contact of relay K1 is connected to the solid-state decoupler B through the first end J3-1 of the third interface J3, and the second end of the normally closed contact of relay K1 is grounded through the second end J3-2 of the third interface J3, or connected to a pipe. That is, the switch module 130 can be connected between the solid-state decoupler and the ground terminal, or between the solid-state decoupler and the pipe. When the first end of the output side of the optocoupler switch OC1 outputs a low-level signal, the coil of relay K1 is energized, and the normally closed contact of relay K1 opens, causing the solid-state decoupler B to disconnect from the ground terminal GND. When the first end of the output side of the optocoupler switch OC1 outputs a high-level signal, the coil of relay K1 is de-energized, the normally closed contact of relay K1 closes, and the solid-state decoupler B remains connected to the ground terminal GND.

[0042] Figure 3 This is a circuit diagram of another pipeline protection device provided in an embodiment of this utility model, such as... Figure 3As shown, the acquisition module 110 includes a first acquisition unit 111 and a second acquisition unit 112. The input terminal of the first acquisition unit 111 is connected to a first node connected to the solid-state decoupler via a pipe, and the output terminal of the first acquisition unit 111 is connected to the main control module 120. The first acquisition unit 111 is used to acquire the voltage of the first node and output a first acquisition signal based on the voltage of the first node. The input terminal of the second acquisition unit 112 is connected to the ground terminal of the solid-state decoupler, and the output terminal of the second acquisition unit 112 is connected to the main control module 120. The second acquisition unit 112 is used to acquire the voltage of the ground terminal of the solid-state decoupler and output a second acquisition signal based on the voltage of the ground terminal of the solid-state decoupler.

[0043] In this embodiment of the invention, the first acquisition unit 111 is a unit for acquiring the voltage of the first node connecting the pipeline and the solid-state decoupler, wherein the first node is connected to the first end of the solid-state decoupler, that is, the first acquisition unit 111 acquires the voltage of the first end of the solid-state decoupler. The second acquisition unit 112 is a unit for acquiring the voltage of the ground terminal of the solid-state decoupler. The first acquisition unit 111 outputs a first acquisition signal based on the voltage of the first end of the solid-state decoupler, and the second acquisition unit 112 outputs a second acquisition signal based on the voltage of the ground terminal of the solid-state decoupler. The main control module 120 determines the fault state of the solid-state decoupler based on the first acquisition signal and the second acquisition signal.

[0044] Continue to refer to Figure 3 The acquisition module 110 also includes a third acquisition unit 113. The input terminal of the third acquisition unit 113 is connected to the reference electrode, and the output terminal of the third acquisition unit 113 is connected to the main control module 120. The third acquisition unit 113 is used to acquire the voltage of the reference electrode and output a third acquisition signal according to the voltage of the reference electrode. The main control module 120 is also used to determine the difference between the first acquisition signal and the second acquisition signal based on the difference between the first acquisition signal and the third acquisition signal, and the difference between the second acquisition signal and the third acquisition signal.

[0045] In this embodiment of the invention, the third acquisition unit 113 is a unit for acquiring the voltage of the reference electrode. The reference electrode is an electrode that can provide a stable reference potential and has a long service life. Due to the conductivity and complexity of environmental media such as soil, the potential at different locations is affected by various factors. Measuring the potential difference between the connection point of the solid-state decoupler and the pipeline, and the grounding terminal of the solid-state decoupler, is inaccurate. The reference potential is a known and relatively fixed standard; that is, the third acquisition signal is a fixed standard value. Based on the differences between the first and third acquisition signals, and the differences between the second and third acquisition signals, the difference between the first and second acquisition signals can be determined, allowing for an accurate determination of the true potential difference between the first terminal and the grounding terminal of the solid-state decoupler. This avoids measurement errors caused by environmental interference and other factors, preventing accurate determination of the potential.

[0046] Specifically, the first acquisition unit 111 includes a first operational amplifier U1, a first capacitor C1, a second capacitor C2, and a first resistor R1. The non-inverting input terminal of the first operational amplifier U1 is connected to the input terminal of the first acquisition unit 111. The inverting input terminal of the first operational amplifier U1 is connected to the second power supply terminal V2. The power supply terminal of the first operational amplifier U1 is connected to the third power supply terminal V3 and the first terminal of the first capacitor C1. The second terminal of the first capacitor C1 is grounded. The ground terminal of the first operational amplifier U1 is grounded. The output terminal of the first operational amplifier U1 is connected to the inverting input terminal of the first operational amplifier U1 and the first terminal of the first resistor R1. The second terminal of the first resistor R1 is connected to the first terminal of the second capacitor C2 and the output terminal of the first acquisition unit 111. The second terminal of the second capacitor C2 is grounded.

[0047] In this embodiment of the invention, the acquisition module 110 further includes a first interface J1. The non-inverting input terminal of the first operational amplifier U1 is connected to the first terminal of the solid-state decoupler through the first terminal J1-1 of the first interface J1. The first operational amplifier U1 amplifies the voltage signal at the first terminal of the solid-state decoupler. The first resistor R1 is a current-limiting resistor, and the first capacitor C1 is a filter capacitor. By amplifying and filtering the voltage at the first terminal of the solid-state decoupler, the first acquisition unit 111 improves the stability of the signal, enabling subsequent circuits to perform data processing more accurately.

[0048] Specifically, the second acquisition unit 112 includes a second operational amplifier U2, a third capacitor C3, a fourth capacitor C4, and a second resistor R2. The non-inverting input of the second operational amplifier U2 is connected to the input of the second acquisition unit 112, the inverting input of the second operational amplifier U2 is connected to the second power supply V2, the power supply of the second operational amplifier U2 is connected to the third power supply V3 and the first end of the third capacitor C3, the second end of the third capacitor C3 is grounded, the grounding terminal of the second operational amplifier U2 is grounded, the output of the second operational amplifier U2 is connected to the inverting input of the second operational amplifier U2 and the first end of the second resistor R2, the second end of the second resistor R2 is connected to the first end of the fourth capacitor C4 and the output of the second acquisition unit 112, and the second end of the fourth capacitor C4 is grounded.

[0049] In this embodiment of the invention, the non-inverting input of the second operational amplifier U2 is connected to the ground terminal of the solid-state decoupler through the second terminal J1-2 of the first interface J1. The second operational amplifier U2 amplifies the voltage signal at the ground terminal of the solid-state decoupler. The second resistor R2 is a current-limiting resistor, and the third capacitor C3 is a filter capacitor. The second acquisition unit 112 improves the signal stability by amplifying and filtering the voltage at the ground terminal of the solid-state decoupler, so that subsequent circuits can perform data processing more accurately.

[0050] Specifically, the third acquisition unit 113 includes a third operational amplifier U3, a fifth capacitor C5, and a third resistor R3. The non-inverting input of the third operational amplifier U3 is connected to the input of the third acquisition unit 113, the inverting input of the third operational amplifier U3 is connected to the second power supply V2, the output of the third operational amplifier U3 is connected to the inverting input of the third operational amplifier U3 and the first end of the third resistor R3, the second end of the third resistor R3 is connected to the first end of the fifth capacitor C5 and the output of the third acquisition unit 113, and the second end of the fifth capacitor C5 is grounded.

[0051] In this embodiment of the invention, the non-inverting input of the third operational amplifier U3 is connected to the reference electrode through the third terminal J1-3 of the first interface J1. The third operational amplifier U3 amplifies the voltage signal of the reference electrode, the third resistor R3 is a current-limiting resistor, and the fifth capacitor C5 is a filter capacitor. The third acquisition unit 113 improves the signal stability by amplifying and filtering the voltage signal of the reference electrode, so that subsequent circuits can perform data processing more accurately.

[0052] Based on the above embodiments, the pipeline protection device also includes a power conversion module. Figure 4 This is a schematic diagram of another pipeline protection device provided in an embodiment of this utility model, as shown below. Figure 4As shown, the power conversion module 410 is connected to the acquisition module 110, the main control module 120, and the switch module 130, and supplies power to these modules. Specifically, the power conversion module 410 converts the input power and outputs power that meets the required specifications. By using this power conversion module, power supply needs can be met for modules with different power requirements.

[0053] Figure 5 This is a circuit diagram of the power conversion module provided in an embodiment of this utility model, as shown below. Figure 5 As shown, the power conversion module includes a first voltage conversion chip U4, a second voltage conversion chip U5, and a third voltage conversion chip U6. The input terminal of the first voltage conversion chip U4 is connected to the first power supply terminal V1. The output terminal of the first voltage conversion chip U4 is connected to the third power supply terminal V3 and the input terminal of the second voltage conversion chip U5. The output terminal of the second voltage conversion chip U5 is connected to the fourth power supply terminal V4 and the input terminal of the third voltage conversion chip U6. The output terminal of the third voltage conversion chip U6 is connected to the second power supply terminal V2.

[0054] In this embodiment of the invention, the power conversion module further includes a second interface J2, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, and a twelfth capacitor C12. The second interface J2 is used to connect to the power supply, i.e., the first power terminal V1. The voltage of the first power terminal V1 is 12V, the voltage of the second power terminal V2 is 2.5V, the voltage of the third power terminal V3 is 5V, and the voltage of the fourth power terminal V4 is 3.3V. The first conversion chip U4 includes pins VIN, VOUT, and GND, and converts the 12V voltage to 5V. The second conversion chip U5 includes pins VIN, VOUT, and GND, and converts the 5V voltage to 3.3V. The third conversion chip U6 includes pins VIN, VOUT, and GND, and converts the 3.3V voltage to 2.5V.

[0055] In this embodiment of the invention, the acquisition module 110 acquires the voltages at the first terminal and the ground terminal of the solid-state decoupler, and outputs a first acquisition signal based on the voltage at the first terminal of the solid-state decoupler, and a second acquisition signal based on the voltage at the ground terminal of the solid-state decoupler. The main control module 120 determines the fault state of the solid-state decoupler based on the difference between the first and second acquisition signals, and at this time, the main control module 120 outputs a control signal. The isolation unit 131 isolates and transmits the control signal to the switching unit 132, and the switching unit 132 disconnects the connection between the solid-state decoupler B and the ground terminal GND. This avoids the loss of cathode current in the pipeline, prevents the pipeline from being corroded, and ensures the safe operation of the pipeline. In addition, the pipeline protection device can indicate the fault state of the solid-state decoupler by setting an indicator light. For example, the indicator light is connected to the main control module. When the main control module detects that the solid-state decoupler is in a fault state, the indicator light is on; when the main control module detects that the solid-state decoupler is in a normal working state, the indicator light is off.

[0056] This utility model embodiment also provides a pipeline drainage system. Figure 6 This is a schematic diagram of a pipe drainage system provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the pipe drainage system 10 provided in this embodiment includes the pipe protection device 100 in any of the above embodiments, and has the beneficial effects of any of the above embodiments, which will not be described again here.

[0057] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0058] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A pipeline protection device, characterized in that, It includes a data acquisition module, a main control module, and a switch module; The pipeline is equipped with a solid-state decoupler, which is connected between the pipeline and the grounding terminal. The acquisition module is connected to the solid-state decoupler. The acquisition module is used to acquire the voltage across the solid-state decoupler and generate a first acquisition signal and a second acquisition signal. The main control module is connected to the acquisition module, and the main control module is used to determine the fault state of the solid-state decoupler based on the difference between the first acquisition signal and the second acquisition signal. The switch module is connected between the solid-state decoupler and the ground terminal. The control terminal of the switch module is connected to the main control module. The switch module is used to disconnect the solid-state decoupler from the ground terminal according to the fault state of the solid-state decoupler.

2. The pipeline protection device according to claim 1, characterized in that, The switching module includes an isolation unit and a switching unit. The first end of the input side of the isolation unit is connected to the output end of the main control module, and the second end of the input side of the isolation unit is grounded. The first end of the output side of the isolation unit is connected to the control end of the switching unit, and the second end of the output side of the isolation unit is grounded. The isolation unit is used to isolate and transmit the signal output by the main control module to the switching unit. The first end of the switching unit is connected to the solid-state decoupler, and the second end of the switching unit is connected to the grounding end. The switching unit is used to disconnect the solid-state decoupler from the grounding end when the fault state of the solid-state decoupler is a short-circuit fault.

3. The pipeline protection device according to claim 2, characterized in that, The isolation unit includes an optocoupler switch. The first end of the input side of the optocoupler switch is connected to the output end of the main control module, the second end of the input side of the optocoupler switch is grounded, the first end of the output side of the optocoupler switch is connected to the control end of the switch unit, and the second end of the output side of the optocoupler switch is grounded.

4. The pipeline protection device according to claim 3, characterized in that, The isolation unit further includes a first Zener diode, the first end of which is connected to the first end of the output side of the optocoupler switch, and the second end of which is connected to the first power supply terminal.

5. The pipeline protection device according to claim 3, characterized in that, The switching unit includes a relay, the first end of the relay coil is connected to a first power supply terminal, the second end of the relay coil is connected to the first end of the output side of the optocoupler switch, the first end of the normally closed contact of the relay is connected to the solid-state decoupler, and the second end of the normally closed contact of the relay is grounded.

6. The pipeline protection device according to claim 1, characterized in that, The acquisition module includes a first acquisition unit and a second acquisition unit. The input terminal of the first acquisition unit is connected to a first node connecting the pipe and the solid-state decoupler, and the output terminal of the first acquisition unit is connected to the main control module. The first acquisition unit is used to acquire the voltage of the first node and output a first acquisition signal based on the voltage of the first node. The input terminal of the second acquisition unit is connected to the ground terminal of the solid-state decoupler, and the output terminal of the second acquisition unit is connected to the main control module. The second acquisition unit is used to acquire the voltage of the ground terminal of the solid-state decoupler and output a second acquisition signal based on the voltage of the ground terminal of the solid-state decoupler.

7. The pipeline protection device according to claim 6, characterized in that, The acquisition module further includes a third acquisition unit. The input terminal of the third acquisition unit is connected to the reference electrode, and the output terminal of the third acquisition unit is connected to the main control module. The third acquisition unit is used to acquire the voltage of the reference electrode and output a third acquisition signal based on the voltage of the reference electrode. The main control module is also used to determine the difference between the first acquisition signal and the second acquisition signal based on the difference between the first acquisition signal and the third acquisition signal, and the difference between the second acquisition signal and the third acquisition signal.

8. The pipeline protection device according to claim 7, characterized in that, The first acquisition unit includes a first operational amplifier, a first capacitor, a second capacitor, and a first resistor. The non-inverting input of the first operational amplifier is connected to the input of the first acquisition unit. The inverting input of the first operational amplifier is connected to a second power supply terminal. The power supply terminal of the first operational amplifier is connected to a third power supply terminal and a first terminal of the first capacitor. The second terminal of the first capacitor is grounded. The ground terminal of the first operational amplifier is grounded. The output of the first operational amplifier is connected to the inverting input of the first operational amplifier and a first terminal of the first resistor. The second terminal of the first resistor is connected to a first terminal of the second capacitor and the output of the first acquisition unit. The second terminal of the second capacitor is grounded. The second acquisition unit includes a second operational amplifier, a third capacitor, a fourth capacitor, and a second resistor. The non-inverting input of the second operational amplifier is connected to the input of the second acquisition unit. The inverting input of the second operational amplifier is connected to the second power supply terminal. The power supply terminal of the second operational amplifier is connected to the third power supply terminal and the first terminal of the third capacitor. The second terminal of the third capacitor is grounded. The ground terminal of the second operational amplifier is grounded. The output of the second operational amplifier is connected to the inverting input of the second operational amplifier and the first terminal of the second resistor. The second terminal of the second resistor is connected to the first terminal of the fourth capacitor and the output of the second acquisition unit. The second terminal of the fourth capacitor is grounded. The third acquisition unit includes a third operational amplifier, a fifth capacitor, and a third resistor. The non-inverting input of the third operational amplifier is connected to the input of the third acquisition unit, the inverting input of the third operational amplifier is connected to the second power supply terminal, the output of the third operational amplifier is connected to the inverting input of the third operational amplifier and the first end of the third resistor, the second end of the third resistor is connected to the first end of the fifth capacitor and the output of the third acquisition unit, and the second end of the fifth capacitor is grounded.

9. The pipeline protection device according to claim 8, characterized in that, The pipeline protection device further includes a power conversion module, which includes a first voltage conversion chip, a second voltage conversion chip, and a third voltage conversion chip. The input terminal of the first voltage conversion chip is connected to a first power supply terminal. The output terminal of the first voltage conversion chip is connected to the third power supply terminal and the input terminal of the second voltage conversion chip. The output terminal of the second voltage conversion chip is connected to a fourth power supply terminal and the input terminal of the third voltage conversion chip. The output terminal of the third voltage conversion chip is connected to the second power supply terminal.

10. A pipe drainage system, characterized in that, Includes the pipeline protection device as described in any one of claims 1-9.

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