Intelligent movable multifunctional cathode protection workstation

Abstract

The invention provides an intelligent movable multifunctional cathode protection workstation, which belongs to the technical field of cathode protection, and comprises a constant potential rectifier, a polarization probe and an auxiliary anode, one end of each polarization probe with a set number is connected with a protected metal pipeline through a cable welding-free joint, and the other end of each polarization probe is connected with the potentiostat; the auxiliary anode is buried in soil on one side of the protected metal pipeline and is connected with the constant potential rectifier through a cable; the polarization probe is used for detecting the protected metal pipeline in real time, the protection potential flowing through the protected metal pipeline serves as the basis for adjusting the auxiliary anode, and the device has the advantages of being micro in power consumption, movable, portable, wide in application range and wide in application range and can replace a cathode protection impressed current system. And a cathode protection and sacrificial anode protection mode can be replaced.

Description

Technical Field

[0001] The invention belongs to the technical field of cathode protection, and in particular relates to an intelligent movable multifunctional cathode protection workstation. Background Art

[0002] Cathodic protection is a common technical means used for active corrosion protection of pipelines. It generates an electric field by discharging electricity to the soil around the pipeline through a constant potential instrument, preventing the outflow of electrons on the pipeline, thereby avoiding pipeline corrosion. Although the electric field generated by the discharge of the constant potential instrument provides cathodic protection for the pipeline, the pipeline is long and the environment in which the pipeline is located often changes. For example, there is often stray current in the soil, which interferes with the electric field generated by the constant potential instrument and causes local corrosion of the pipeline. In order to avoid aggravating the corrosion of the pipeline due to changes in the environment in which the pipeline is located, it is necessary to adjust the output of the constant potential instrument in time according to the corrosion situation of the pipeline.

[0003] Since urban rail transit may generate a large amount of high-energy impact current during operation, the impact current of the existing cathodic protection system is much greater than the protection current of the cathodic protection system, causing the protection potential of the buried steel pipeline in the area where the stray current flows in to have a large negative offset, even exceeding the range allowed by the specification; and the protection potential of the buried steel pipeline in the area where the stray current flows out has a large positive offset, even in the range of under-protection and failure to meet the standard. This causes the cathodic protection effect to be disturbed, greatly affecting the operating safety and stability of the buried pipeline cathodic protection system.

[0004] The cathodic protection impressed current system currently designed and operated has the characteristics of large size, high power consumption, complex installation, troublesome subsequent maintenance, the need for a special cathodic protection room and alternating voltage power supply, low intelligence, high cost, etc., which has great limitations. To add a cathodic protection system to old pipelines in urban areas or to repair pipelines with unqualified protection potential, sacrificial anode method is now commonly used for protection, which has the characteristics of difficult land acquisition, troublesome excavation, small protection current, short protection distance, short protection life, and troublesome maintenance, which is very difficult to construct. Summary of the invention

[0005] The present invention aims at the problems in the prior art, and the technical solution adopted in the present application is: an intelligent movable multifunctional cathodic protection workstation, comprising: a constant potential instrument, a polarization probe and an auxiliary anode; one end of a set number of polarization probes is connected to a protected metal pipeline through a cable welding-free joint, and the other end is connected to the constant potential instrument; the auxiliary anode is buried in the soil on one side of the protected metal pipeline and connected to the constant potential instrument through a cable; the protected metal pipeline is detected in real time through the polarization probe, and the protection potential flowing through the protected metal pipeline is used as the basis for adjusting the auxiliary anode; Furthermore, the constant potentiostat includes a microprocessor, which is connected to a buck-boost power management circuit. The power of the buck-boost power management circuit is input from the Z4 terminal and the Z5 terminal, and enters the MPDY power module after passing through lightning protection, overvoltage, current limiting, and backflow protection and reverse connection protection devices; the MPDY power module conditions the input power, and according to the required output voltage and current requirements, switches the Q1 or Q2 field effect transistor to boost or buck the input voltage so as to output a voltage and current that meets the requirements.

[0006] Furthermore, the polarization probe comprises a shell, the shell has a built-in reference electrode and a polarization test piece, and is filled with a gel drag reducing agent, and the gel drag reducing agent is gel copper sulfate.

[0007] Furthermore, the auxiliary anode comprises a seamless steel pipe, and a plurality of circular water seepage sieve holes are arranged in an array on the outer side, and the circular water seepage sieve holes are blocked by water-soluble sieve hole plugging plugs.

[0008] Furthermore, the constant potentiostat adopts a micro-power consumption intelligent cathodic constant potentiostat, and the microprocessor is also connected to the data acquisition part voltage adjustment circuit, 4G communication level conversion circuit, voltage output control module and output protection circuit, MCU and touch screen power supply circuit, touch screen protection and power supply circuit, pipeline potential data acquisition circuit, voltage conditioning circuit after data acquisition, upgrade debugging serial port circuit and related indicator light circuit.

[0009] Furthermore, the auxiliary anode adopts a new type of quick-installation auxiliary anode, including a seamless steel pipe, which is installed on the cable or pipeline by means of a flange connection plate, and is fastened and installed by means of high-strength connecting bolts. A first semipermeable membrane, a second semipermeable membrane, an air guide tube, a special cable threading tube, a special potential transmission cable, a mixed metal oxide anode, an anode straightener and a micro-permeable membrane are arranged in the seamless steel pipe; a cable pipe straightener is arranged inside the upper half of the seamless steel pipe, and is filled with an ion drag reducing agent; high-purity petroleum coke powder is filled in the lower half of the seamless steel pipe; the seamless steel pipe is also provided with circular water seepage sieve holes arranged in an array on the outer side, and the circular water seepage sieve holes are sealed with water-soluble sieve hole plugging plugs.

[0010] Furthermore, the polarization probe adopts a long-life anti-interference polarization probe, including a shell, a six-core test cable, a test piece, an epoxy resin filling, a gel resistance reducing agent, copper sulfate crystals, a spiral copper core, an electrode semi-permeable ceramic pot and a backfill material. The test piece is installed on the top surface of the shell, and a six-core test cable is arranged in the center of the top surface of the shell. One end of the six-core test cable passes through the shell and is arranged on the backfill material on the bottom surface of the shell. The shell is filled with a gel resistance reducing agent. The backfill material is arranged at the bottom of the shell. The electrode semi-permeable ceramic pot is arranged on the backfill material. The electrode semi-permeable ceramic pot is filled with copper sulfate crystals. The top of the electrode semi-permeable ceramic pot is arranged with an epoxy resin filling. The spiral copper core is installed in the center of the electrode semi-permeable ceramic pot. One end of the spiral copper core is connected to the backfill material and the other end is connected to the epoxy resin filling.

[0011] Furthermore, the cable welding-free joint includes a special-shaped metal kit, an iron sealing piece, a cable, a built-in magnet, a copper sealing piece and a two-component special copper conductive adhesive; the special-shaped metal kit is connected to the pipeline using the two-component special copper conductive adhesive, and the copper sealing piece, the built-in magnet, the cable and the iron sealing piece are installed in the special-shaped metal kit in sequence.

[0012] Furthermore, the cable is a special cable for cathodic protection, which is made of high molecular weight polyethylene and has a copper core inside.

[0013] Furthermore, the constant potentiostat is also connected to a solar power supply system, and the solar power supply system supplies power to the constant potentiostat.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are: 1. The intelligent mobile cathodic protection workstation provided by the present invention is a cathodic protection system of a new design. The system consists of a new type of micro-power intelligent cathodic protection constant potential instrument, a new type of quick-installation auxiliary anode, a long-life anti-interference polarization probe, a new type of solar power supply system, a special cathodic protection cable and a cable welding-free connector. It is completely different from the original design concept of the cathodic protection system, and has the characteristics of micro-power consumption, mobility, portability, intelligence, powerful functions, wide application range and wide use; it can replace the cathodic protection impressed current system, and can also replace the cathodic protection sacrificial anode protection method.

[0015] 2. The present invention designs a voltage adjustment circuit for the data acquisition part, a 4G communication level conversion circuit, a buck-boost power management circuit, a voltage output control module and an output protection circuit, an MCU and a touch screen power circuit, a touch screen protection and power supply circuit, a pipeline potential data acquisition circuit, a voltage conditioning circuit after data acquisition, an upgrade debugging serial port and related indicator light circuits, and combines a polarization probe to detect the protected metal pipeline in real time, and uses the protective potential flowing through the protected metal pipeline as the basis for adjusting the auxiliary anode, and performs cathodic protection as needed. By adopting low-power electronic components and an optimized power management strategy, the energy consumption of the equipment is significantly reduced, which enables the potentiometer to operate stably for a long time even in remote areas with limited energy supply, while reducing It has less impact on the environment, can operate stably with AC power supply, and can also be constructed and operate for a long time without AC power supply. The construction area is extremely small, and the overall construction cost is low. It can protect long-distance pipelines of more than 30KM and pipelines in complex urban environments of more than 10KM. While solving the shortcomings of the impressed current system, it can perfectly replace the sacrificial anode cathodic protection method. The main application scope: construction of cathodic protection system when there is no AC power supply or cathodic protection room in the construction site, temporary cathodic protection system for pipelines, power feeding experiments for new and old pipelines, forced drainage system for pipelines when DC stray current interferes, construction of cathodic protection system in explosion-proof places, construction of intelligent cathodic protection system and cathodic protection system for urban pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a structural schematic diagram of the intelligent movable cathodic protection workstation of the present invention; Figure 2 This is a schematic diagram of the structure of the novel quick-install auxiliary anode of the present invention; Figure 3 It is a schematic structural diagram of the long-life anti-interference polarization probe of the present invention; Figure 4 It is a step-up and step-down power supply management circuit diagram of the micro-power consumption intelligent cathode protection potentiometer of the present invention; Figure 5 A voltage output control module and an output protection circuit of a micro-power consumption intelligent cathode protection potentiometer of the present invention; Figure 6 The MCU and touch screen power supply circuit of the micro-power consumption intelligent cathode protection potentiometer of the present invention; Figure 7 A touch screen protection and power supply circuit for the micro-power consumption intelligent cathode protection potentiometer of the present invention; Figure 8 It is a schematic diagram of a 4G communication level conversion circuit of a micro-power consumption intelligent cathodic protection potentiometer of the present invention; Fig. 9 It is a voltage adjustment circuit diagram of the data acquisition part of the micro-power consumption intelligent cathode protection potentiometer of the present invention; Fig.10 It is a pipeline potential data acquisition circuit diagram of the micro-power consumption intelligent cathodic protection potentiometer of the present invention; Fig.11 It is a voltage conditioning circuit after data acquisition of the micro-power consumption intelligent cathode protection potentiometer of the present invention; Fig.12 It is a schematic diagram of a microprocessor circuit of a micro-power consumption intelligent cathodic protection potentiometer of the present invention; Fig.13 It is the indicator light circuit diagram of the micro-power consumption intelligent cathode protection potentiometer of the present invention; Fig.14 It is a schematic diagram of the upgrade debugging port circuit of the micro-power consumption intelligent cathodic protection potentiometer of the present invention; Fig.15 It is a schematic diagram of the external structure of the micro-power consumption intelligent cathodic protection potentiometer of the present invention; Fig.16 A top view of the cable welding-free joint of the present invention; Fig.17 It is a side view of the cable welding-free joint of the present invention; Fig.18 This is a schematic diagram of the structure of the novel quick-install auxiliary anode of the present invention; Fig.19 It is a structural schematic diagram of the solar power supply system of the present invention; Fig. 20 It is a structural schematic diagram of the solar energy-specific colloidal storage battery of the present invention; Among them: 1. Solar power supply system; 2. Micro-power intelligent cathodic protection potentiometer; 3. Solar-specific colloidal battery; 4. Long-life anti-interference polarization probe; 5. Cable welding-free joint; 6. New quick-install auxiliary anode; 7. Protected metal pipeline; 8. Cathodic protection special cable; 401. Six-core test cable; 402. Test piece; 403. Epoxy resin filling; 404. Gel resistance reducing agent; 405. Copper sulfate crystal; 406. Spiral copper core; 407. Semi-permeable ceramic pot for electrode; 408. Backfill; 501. Special-shaped metal kit; 502. Iron plugging piece; 503. Cable; 504 , built-in magnet; 505, copper sealing piece; 506, two-component special copper conductive glue; 601, high-strength connecting bolt; 602, air guide tube; 603, first semi-permeable membrane; 604, special cable threading tube; 605, water-soluble sieve hole plugging plug; 606, circular seepage sieve hole; 607, second semi-permeable membrane; 608, flange connection plate; 609, cable pipe centralizer; 610, ion resistance reducing agent; 611, special potential transmission cable; 612, mixed metal oxide anode; 613, anode centralizer; 614, micro-permeable membrane; 615, high-purity petroleum coke powder; 616, seamless steel pipe. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] Embodiment 1, as Figure 1-Figure 20 As shown, the present application provides an intelligent movable multifunctional cathodic protection workstation, including a micro-power intelligent cathodic protection constant potential instrument 2, a new quick-installation auxiliary anode 6, a long-life anti-interference polarization probe 4, a solar power supply system 1, a cable welding-free joint 5 and a special cathodic protection cable 8.

[0021] The solar power supply system 1 is connected to the intelligent cathodic protection constant potential instrument for power supply; the long-life anti-interference polarization probe 4 is arranged in the soil on one side of the protected metal pipe 7 along the extension direction of the protected metal pipe, and the long-life anti-interference polarization probe 4 is connected to the solar power supply system 1. A set number of long-life anti-interference polarization probes 4 are also connected to the protected metal pipe 7 through a cable welding-free joint 5. Through the welding-free connection, the cathodic protection workstation can be dismantled and reused to realize the long-distance transfer of the cathodic protection workstation.

[0022] A plurality of novel quick-install auxiliary anodes 6 are buried in the soil on one side of the protected metal pipe 7 and connected to the micro-power intelligent cathodic protection constant potential instrument 2 through a special cathodic protection cable 8. The corrosion condition and cathodic protection status of the protected metal pipe 7 are detected in real time through the potential change of the polarization probe, and the decrease or increase of the current flowing through the polarization probe is used as the basis for adjusting the novel quick-install auxiliary anodes 6, so as to improve the cathodic protection effect of the protected metal pipe 7 and reduce the impact of a large amount of high-energy impact current on the protected metal pipe during the operation of urban rail transit.

[0023] As an implementation method, the micro-power consumption intelligent cathodic constant potential instrument 2 includes a microprocessor, which is connected to a voltage adjustment circuit of a data acquisition part, a 4G communication level conversion circuit, a buck-boost power supply management circuit, a voltage output control module and an output protection circuit, an MCU and a touch screen power supply circuit, a touch screen protection and power supply circuit, a pipeline potential data acquisition circuit, a voltage conditioning circuit after data acquisition, an upgrade debugging serial port circuit, and a related indicator light circuit. The microcontroller is selected as an ultra-low power consumption type, and the whole machine adopts a micro-power consumption design, which greatly reduces the energy consumption of the device itself.

[0024] The input signal of the micro-power intelligent cathode protection constant potential instrument 2 is usually physically isolated. When needed, it is connected to collect potential. According to the potential range set on the screen, the microcontroller automatically controls the voltage output. Through advanced algorithm design, the cathode protection potential can be stably controlled within the output range. The whole process is autonomously controlled by the microcontroller without manual participation, achieving a good cathode potential protection effect. The locally collected data can be sent to the server center through the 4G module, and the management personnel can remotely grasp the operation of the constant potential instrument, which is convenient for personnel management.

[0025] Among them, the microprocessor can use the HC32L176KATA main control chip, as shown in the following example: Fig.12The schematic diagram of the microprocessor circuit shown in the figure shows that the MCU is the minimum system to ensure operation. The relevant parameters are input through the touch screen. The MCU adjusts the output voltage according to the set parameters, and continuously collects the pipeline potential according to the set value, calibrates and outputs the voltage. Among them, pin 1 of the HC32L176KATA main control chip is connected to capacitors C16 and C17 and then grounded, pin 3 is connected to LFXTAL-N, pin 4 is connected to LFXTAL-P, pin 7 is connected to RST, and pin 9 is connected to AD OUT, pin 10 connected to BATAD, pin 11 connected to AD-OI, pin 12 connected to ground, pin 13 connected to capacitor C9 and capacitor C8 and then grounded, pin 14 connected to LU-T, pin 15 connected to LU-R, pin 18 connected to CTR-CY, pin 19 connected to CTRCY-5V, pin 20 connected to ALERT1, pin 21 connected to SDA1, pin 22 connected to SCL1, pin 24 connected to LU0-T, pin 25 connected to LU0-R, pin 31 connected to ground, pin 32 connected to capacitor C10 and capacitor C11 and then grounded, pin 33 connected to EMERGNCY KEY, pin 34 is connected to USER-LED, pin 35 is connected to USER-LED2, pin 37 is connected to UT3-RX, pin 38 is connected to UT3-TX, pin 39 is connected to GNSSEN, pin 40 is connected to PWRKEY, pin 41 is connected to CTR-4G, pin 42 is connected to CTR-FS, pin 43 is connected to CTR-FM, pin 46 is connected to DBG-SWDIO, pin 49 is connected to DBG-SWCLK, pin 51 is connected to LU-T0, pin 52 is connected to LU-R0, pin 53 is connected to CTR VO, pin 55 is connected to resistor 37 and then to ALT, pin 56 is connected to resistor R35 and then to SDA, pin 57 is connected to resistor R36 and then to SCL, pin 58 is connected to resistor 38 and then to EN, pin 59 is connected to VEN2, pin 60 is connected to resistor R104 and then to ground, pin 63 is grounded, pin 64 is connected to capacitor C12 and capacitor C13 and then to ground, MCU adjusts the output voltage according to the set parameters, calibrates and outputs the voltage, so that the system has a self-diagnosis function, can promptly detect and record equipment failures or abnormal conditions, and notify maintenance personnel through the alarm mechanism.

[0026] The voltage adjustment circuit of the data acquisition part, the specific circuit is as follows Fig. 9 As shown, it is connected to the HC32L176KATA main control chip through the CTRCY-5V line. In order to ensure the accuracy of data collection, the voltage is converted to increase the collection value range.

[0027] 4G communication level conversion circuit Figure 8As shown in the figure, the 4G module and MCU have different levels, and they need to be converted before they can communicate normally. They are connected to the HC32L176KATA main control chip through lines CTR-FM and CTR-FS. Through wireless communication technology (such as GPRS, 4G, 5G, NB-IOT, etc.), the micro-power intelligent cathodic protection potentiometer can upload protection parameters to the monitoring center in real time, which is convenient for remote monitoring and management. For example, when the temperature of the equipment rises to the set temperature, the fan starts to run to cool down the equipment and ensure the normal operation of the equipment; when an abnormality is detected in the equipment or the alarm state is reached, the buzzer alarm can be set to start.

[0028] Buck-boost power management circuit Figure 4 As shown, the power is input from Z4 and Z5, and enters the MPDY power module after passing through lightning protection, overvoltage, current limiting, and anti-backflow and anti-reverse protection devices. The MPDY power module can regulate the power input from Z4 and Z5. According to the required output voltage and current requirements, the input voltage is stepped up / down by switching the Q1 / Q2 field effect transistor to output the required voltage and current. The MPDY power module is connected to the HC32L176KATA main control chip through the AD OUT line. By adopting low-power electronic components and optimized power management strategies, the energy consumption of the equipment is significantly reduced, which enables the potentiometer to operate stably for a long time even in remote areas with limited energy supply, while reducing the impact on the environment.

[0029] Specifically, the power supply is connected from the Z4 device and the Z5 device. The Z4 device is connected to the second port of the 12VBAT device and then connected to the VIN0 line. The Z5 device is connected to the first port of the 12VBAT device and then connected in series with the TS1-SMBJ20CA device and then connected to the VIN0 line. A lightning protection line is connected in parallel to the VIN0 line. The lightning protection line includes the 14D820K-MOV1 device, the FD-fdg20ka device, the FD2-fdg20ka device and the 14D820K-MOV2 device, and the FD-fdg20ka device The line between the FD2-fdg20ka device and the FD2-fdg20ka device is connected to PGDN; the VIN0 line is connected to the resistor PUS and the diode D1 in sequence and then connected to the pin 20 of the MPDY power module for overvoltage and current limiting protection. The pin 20 of the MPDY power module is also connected to the 5th, 6th, 7th and 8th ports of the Q1MOS field effect tube. The pin 20 of the MPDY power module is also connected to the 3rd port of the Q11 device for backflow and reverse connection protection; there are also multiple capacitors in parallel on the VIN0 line, such as capacitor CD2, capacitor CD10, Capacitors CD11, CD8 and CD9, and one end of these capacitors is connected to GDN; Pin 1 of the MPDY power module is connected to the SCL line, the SCL line is connected to VCC5V after being connected to resistor RD1 in parallel, Pin 2 of the MPDY power module is connected to resistor RD2 and then connected to VCC5V, Pin 3 of the MPDY power module is connected to resistor RD3 and then connected to VCC5V, Pin 4 of the MPDY power module is connected to resistor RD8 and resistor RD6 and then connected to the DCOUT1 device, and the line between resistor RD6 and resistor RD8 is connected to resistor R D7 is connected to GDN, and the line between the resistor RD6 and the DCOUT1 device is connected to the 5th port, 6th port, 7th port and 8th port of the Q2MOS field effect tube; pin 5 of the MPDY power module is connected to GDN, pin 6 of the MPDY power module is connected to GDN3, pin 7 of the MPDY power module is connected to the 1st port, 2nd port and 3rd port of the Q2MOS field effect tube, and pin 7 of the MPDY power module is also connected to the 2nd port of the Q11 device, and the 1st port of the Q11 device is connected to the 4th port of the Q1MOS field effect tube.

[0030] Voltage output control module and output protection circuit such as Figure 5As shown, the conditioned voltage / current is output to the pipeline after the relay is closed. To prevent interference from entering the pipeline, lightning protection and overvoltage protection are performed before output, and the AC signal is bypassed to prevent damage from electrical displacement. At the output end, the output voltage is sampled and detected through a sampling resistor, and the output voltage value is adjusted in a closed loop; the voltage output control module and the output protection circuit are connected to the HC32L176KATA main control chip through the AD-OI line, which can automatically monitor the protection potential of the pipeline, and automatically adjust the output voltage and current according to real-time data to ensure that the pipeline is always in the best cathodic protection state.

[0031] MCU and touch screen power supply circuit such as Figure 6 As shown, the control part power supply, in order to ensure the normal operation of the equipment, the input power supply is stepped down to ensure the stable and reliable operation of the control part. The power input is protected by anti-reverse connection protection to protect the control part. The MCU and touch screen power supply circuit are connected to the HC32L176KATA main control chip through the BATAD line.

[0032] Touch screen protection and power supply circuit such as Figure 7 As shown, since the device is powered by solar energy, the device is processed with low power consumption as much as possible. When it is necessary to connect to the Internet and report relevant data, the 4G power supply is turned on to perform operations such as connecting to the Internet. After the networking task is completed, the 4G power supply is cut off to reduce the power consumption of the whole device as much as possible; the touch screen protection and power supply circuit is connected to the HC32L176KATA main control chip through the CTR-4G line. The touch screen protection and power supply circuit is used to control the touch screen. The touch screen can provide an operation interface and display interface of the potentiometer, so that users can easily set parameters, view status and process data.

[0033] Pipeline potential data acquisition circuit Fig.10 As shown, to ensure the normal operation of the potentiometer, overvoltage, overcurrent, lightning protection / surge protection are added at the potential collection point, and when the equipment detects an abnormality, the data collection point is connected or disconnected. The pipeline potential data acquisition circuit is connected to the HC32L176KATA main control chip through the CTR-CY line.

[0034] The voltage conditioning circuit after data acquisition is as follows Fig.11 As shown, in order to ensure that the MCU can collect data reliably, the collected voltage needs to be conditioned to ensure that the MCU can reliably read the collected potential value. The voltage conditioning circuit after data collection is connected to the HC32L176KATA main control chip through the SDA1 line.

[0035] Related indicator light circuits such as Fig.13 As shown, it is connected to the HC32L176KATA main control chip through USER-LED and USER-LED2.

[0036] Upgrade and debug serial port circuit Fig.14 As shown, DBG-SWDIO, DBG-SWCLK, LU-T0 and LU-R0 are connected to the HC32L176KATA main control chip. The corresponding data analysis software can be set by upgrading the debugging serial port circuit, which can conduct in-depth analysis on the collected data to help optimize the cathodic protection strategy and improve the protection efficiency.

[0037] The cathodic protection micro-power intelligent cathodic protection potentiometer is a device used for corrosion protection of metal structures such as oil and gas pipelines. It inhibits the corrosion process of metals by applying direct current, thereby extending their service life. It has basic anti-corrosion functions and also integrates the characteristics of micro-power consumption and intelligence to improve the energy efficiency and operational convenience of the system.

[0038] As an implementation method, the new quick-install auxiliary anode is mainly used to protect buried metal structures, such as oil and gas pipelines, storage tanks, etc., to prevent their corrosion. The new quick-install auxiliary anode includes the following parts: high-strength connecting bolts 601, air guide tube 602, first semi-permeable membrane 603, special cable threading tube 604, water-soluble sieve hole plugging plug 605, circular seepage sieve hole 606, second semi-permeable membrane 607, flange connection plate 608, cable pipe straightener 609, ion resistance reducing agent 610, special potential transmission cable 611, mixed metal oxide anode 612, anode straightener 613, micro-permeable membrane 614, high-purity petroleum coke powder 615, seamless steel pipe 616; the seamless steel pipe 616 is connected to the cable or pipeline by flange connection plate 608, and connected by high-strength connecting bolts. The bolt 601 is fastened and installed, and the seamless steel pipe 616 is provided with a first semipermeable membrane 603, a second semipermeable membrane 607, an air guide tube 602, a special cable threading tube 604, a special potential transmission cable 611, a mixed metal oxide anode 612, an anode straightener 613 and a micro-permeable membrane 614. A cable pipe straightener 609 is arranged inside the upper half of the seamless steel pipe 616 and filled with an ion drag reducing agent 610, and the lower half of the seamless steel pipe is filled with high-purity petroleum coke powder 615; the seamless steel pipe 616 also has circular water seepage sieve holes 606 arranged in an array on the outer side, and the circular water seepage sieve holes 606 are blocked with water-soluble sieve hole plugging plugs 605.

[0039] As a specific implementation method, the dimensions and schematic diagram of the new quick-install auxiliary anode are as follows: Fig.17As shown, the name of the structural part in the figure is the 095 type new quick-installation auxiliary anode diagram; the diameter of the protective casing is 95*1000, and Q235 seamless steel pipe is used; the size of the pre-packaged anode is 95*1000, and the number of uses can be adjusted according to the actual situation on site; each group of anodes contains a mixed metal oxide anode with a size of 025*200mm, and the anode comes with a lead-out cable (the length of each group of cables is determined according to the total size); the cable threading pipe inside the anode tube uses a 25 pre-supported PVC pipe, the anode is filled with ion resistance reducing agent around the anode, and the lower position is filled with high-purity petroleum coke powder, and the cable protection pipe is fixed by a centralizer and a clamp; the circular seepage sieve holes around the auxiliary anode body are blocked by water-soluble sieve hole plugging plugs, which do not need to be removed after installation and will dissolve in water; length (L=3m), diameter (d=89mm).

[0040] Dosage calculation: Resistance reducing agent: In order to improve the current transmission efficiency of deep well anodes, resistance reducing agents are usually used around the anodes. The resistance reducing agent of the new quick-install auxiliary anode uses forged petroleum coke. According to the anode well size of the auxiliary anode, the amount of resistance reducing agent is 1.99m³. The purpose of the resistance reducing agent is to reduce the contact resistance between the anode and the soil, thereby improving the overall efficiency of the system. Generally, calcined petroleum coke is used as a resistance reducing agent, and its resistivity is 0.58*10-3Ω.

[0041] Measuring soil resistivity: Soil resistivity (ρ) is an important factor affecting the anode grounding resistance and is usually obtained through on-site measurement. Soil resistivity varies depending on soil type, moisture content, temperature and other environmental factors, and is temporarily taken as 50Ω during calculation.

[0042] Calculate the anode ground resistance:

[0043] In the formula: RV—grounding resistance of deep buried auxiliary anode, in ohm (Ω); ρ—soil resistivity, in ohm-meter (Ω*m); La—auxiliary anode length (including filler), in meter (m); Da—auxiliary anode diameter (including filler), in meter (m). The grounding resistance of the auxiliary anode group is calculated to be 11.17Ω (there is 1 auxiliary anode, L=1m, D=89mm) As an implementation method, the long-life anti-interference polarization probe 4 uses a built-in reference electrode and a polarization test piece, and is filled with a special gel resistance reducing agent 404 to reduce the influence of the external environment on the measurement results. It specifically includes a shell, a six-core test cable 401, a test piece 402, an epoxy resin filling 403, a gel resistance reducing agent 404, a copper sulfate crystal 405, a spiral copper core 406, an electrode semi-permeable ceramic pot 407 and a backfill material 408. The test piece 402 is installed on the top surface of the shell, and the six-core test cable 401 is set in the center of the top surface of the shell. One end of the six-core test cable 401 passes through the inner device of the shell. A backfill material 408 is placed on the bottom of the shell, the shell is filled with a gel resistance reducing agent 404, the backfill material 408 is arranged at the bottom of the shell, an electrode semi-permeable pottery 407 is arranged on the backfill material 408, copper sulfate crystals 405 are filled in the electrode semi-permeable pottery 407, an epoxy resin potting 403 is arranged on the top of the electrode semi-permeable pottery 407, a spiral copper core 406 is installed in the center of the electrode semi-permeable pottery 407, one end of the spiral copper core 406 is connected to the backfill material 408 and the other end is connected to the epoxy resin potting 403; wherein the test piece 402 is a polarization test piece, and the end of the six-core test cable 401 forms a reference electrode.

[0044] As a specific implementation method, the long-life anti-interference polarization probe 4 adopts a special gel formula, which is made of a high-conductivity, cold-resistant, and heat-resistant adhesive mixed with copper sulfate and a conductive electrolyte solution in a fixed ratio. The temperature range of this gel copper sulfate is -30 to +60 degrees. Compared with the standard calomel electrode, the deviation is less than 10mv. After high and low temperature tests, the service life of the probe is effectively extended and the replacement frequency is reduced.

[0045] Installation steps: Before installation, ensure that the probe has been properly soaked and the packing package has been configured according to the manufacturer's instructions. On the side of the protected metal pipe, select a location with an appropriate horizontal distance from the center line of the protected metal pipe to drill or excavate. Place the configured packing package with the probe into the drill hole or pit, ensuring that the appropriate amount of packing is evenly distributed around the probe. Connect the probe cable to the fixed terminal and ensure that the connection is secure. Backfill with fine soil to avoid damaging the cable and probe, and ensure that the top of the probe is in full contact with the ground. After installation, test to verify that the probe is working properly and record the initial reading. Regular inspection: Regularly check the performance of the probe and the integrity of the cable. Regularly record the measurement data of the probe for long-term trend analysis. Pay attention to the environmental conditions of the probe, such as soil moisture, temperature, etc., to ensure the accuracy of the measurement results.

[0046] As an implementation method, the solar power supply system 1 is mainly composed of the following parts: solar panels, controllers, batteries, inverters, brackets and cables; solar panels are responsible for converting sunlight into electrical energy as the main energy source of the system; the controller is used to manage the current generated by the panels, protect the batteries from damage caused by overcharging or over-discharging, and ensure stable operation of the system; the batteries are used to store the electrical energy generated by the solar panels for use at night or during periods without sunshine; the inverter is used to convert direct current into alternating current for use by AC loads; brackets and cables are used to fix the solar panels and connect the various components; the solar power supply system is independent of the traditional power grid, is not affected by power grid failures, can provide a stable and continuous power supply, is energy-saving, environmentally friendly and pollution-free, and can be applied to various environments, especially in remote areas and places where it is difficult to access the mains.

[0047] As an implementation method, the cable welding-free joint is an adsorbable wiring method with super strong NdFeB magnetism, and has good conductive stability. It can be used as a basis to connect pipelines and cables instead of traditional aluminothermic welding process, providing a good conductive carrier for the research object. The cable welding-free joint includes a special-shaped metal kit 501, an iron plugging piece 502, a cable line 503, a built-in magnet 504, a copper plugging piece 505, and a two-component special copper conductive glue 506. The special-shaped metal kit 501 is connected to the pipeline using a two-component special copper conductive glue 506. The copper plugging piece 505, the built-in magnet 504, the cable line 503 and the iron plugging piece 502 are sequentially installed in the special-shaped metal kit 501. The cable welding-free joint can be directly adsorbed on the pipeline, and no aluminum thermite welding is required. It has strong conductivity, high construction safety, low work intensity, and is easy to construct and move. The welding-free magnetic cable joint provides an efficient solution for cable connection with its fast, safe and reliable connection method. Through proper installation and use, the stable operation of the electrical system can be ensured, while reducing maintenance costs and improving work efficiency. When selecting and using welding-free magnetic cable connectors, the compatibility with the cable, environmental adaptability, and maximum load capacity should be considered to ensure optimal performance.

[0048] Copper plugging sheet, the resistivity of copper is 0.0172Ωm at standard atmospheric pressure and room temperature, which means that the resistance of each meter of copper is 0.0172Ω. Under constant temperature, the resistance of the material is: R=ρL / S (R resistance, S cross-sectional area, L length, ρ resistivity). After calculation, the resistance value of the copper sheet connected to the pipe on the welding-free joint is 0.0243Ω, which has excellent conductivity.

[0049] Working method of cable welding-free connection: Connect the cable and the pipeline with a cable welding-free joint. Before connection, the insulation layer of the pipe should be removed, and a scraper or file should be used to make the pre-welding area have a sufficiently large metal bright surface. The cable welding-free joint must be clean, dry, oil-free and grease-free. The welding point must be at least 200mm away from the pipeline weld; evenly apply copper powder conductive glue on the side where the cable welding-free joint contacts the pipeline to better improve the conductivity; clean the adsorption position of the cable welding-free joint, and clean the burrs, slag, splashes, etc. near it, and clean the dirt, oil and impurities at the patching (if necessary, use a cleaning agent); the cable welding-free joint and the pipeline should be firmly adsorbed. After connection, the burrs, slag, splashes, etc. near it should be cleaned, and the dirt, oil and impurities at the patching (if necessary, use a cleaning agent (C) Cleaning agent (C) should be cleaned; the cable welding joint and the pipeline are confirmed to be connected well before the repair process can be carried out. When repairing, first fill the entire cable welding joint and the metal surface of the pipeline with viscoelastic anti-corrosion paste, then apply the repair piece, and finally wrap the entire welding point with heat shrink tape. The length of the heat shrink sleeve must be at least 50mm beyond the edge of the repair piece; in order to prevent the cable from being pulled off the pipeline due to force after backfilling, sufficient margin should be left on the ground and underground. The laying of underground cables should be carried out after the pipeline is trenched and before backfilling. It is advisable to stick to the top of the pipe wall and use Φ3mm nylon rope for bundling; the connection between cables is made of copper tube clamps, the insulation layer should be removed from the cable end, the core wire should extend 50mm, and the cables at both ends are inserted into the copper tube 25mm for crimping, and then coated with hot melt adhesive, and then heated, shrunk and sealed with a special cable heat shrink sleeve for corrosion protection.

[0050] As an implementation method, the cathodic protection dedicated cable can be made of high molecular weight polyethylene with a copper core inside. It is used to connect the cathodic protection equipment and the protected structure, such as pipelines, storage tanks, etc. It has the characteristics of chemical corrosion resistance, environmental aging resistance, low resistivity, etc. to ensure the effective operation and long-term stability of the cathodic protection system.

[0051] Intelligent mobile cathodic protection workstation Calculation of protection distance: Micro-power intelligent cathodic protection potentiometer pipeline protection distance calculation:

[0052] Where: LP—single-side protection pipeline length, in meters (m); △V—difference between limit protection potential and protection potential, in volts (V); DV—outer diameter of pipeline, in meters (m); JS—protection current density, in amperes per square meter (A / m²); RS—pipeline line resistance, in ohms per meter (Ω / m); ρT—steel pipe resistivity, in ohms per square millimeter per meter (Ω.mm² / m); —Pipeline wall thickness, in millimeters (mm); After calculation, we can get:

[0053] The intelligent mobile cathodic protection workstation consists of a new type of micro-power intelligent cathodic protection constant potential instrument 2, a new type of quick-installation auxiliary anode 6, a long-life anti-interference polarization probe 4, a new type of solar power supply system 1, a cable welding-free connector 5 and a cathodic protection special cable 8. It is completely different from the original cathodic protection system design concept and has the characteristics of micro-power consumption, fast adjustment, mobility, intelligence, powerful functions, wide application range and wide use. It can replace the cathodic protection impressed current system and the cathodic protection sacrificial anode protection method.

[0054] The cost of the sacrificial anode cathodic protection system for natural gas pipelines is the main factor restricting its application, including the length, diameter, anti-corrosion layer material, installation time, material and quantity of sacrificial anodes, soil resistivity, geographical location, etc. The technical solution provided by this embodiment has good cost performance and sufficient cathodic protection effect, and is therefore conducive to large-scale promotion and application.

[0055] The main application scope of the intelligent mobile cathodic protection workstation: construction of cathodic protection system in the field without AC power supply or cathodic protection room, temporary cathodic protection system for pipelines, feeding experiments of new and old pipelines, forced drainage system for pipelines when DC stray current interferes, construction of cathodic protection system in explosion-proof places, construction of intelligent cathodic protection system and cathodic protection system for urban pipelines.

[0056] This embodiment provides an intelligent mobile cathodic protection workstation that can be constructed and operated for a long time without an AC power supply. The construction site occupies a very small area and the overall construction cost is low. It can protect long-distance pipelines over 30 km and pipelines in complex urban environments over 10 km. While solving the shortcomings of the impressed current system, it can perfectly replace the sacrificial anode method of cathodic protection, effectively improve the monitoring and management level of pipeline cathodic protection, reduce the operation and maintenance costs of enterprises, improve the reliability of data collection, and lay the foundation for the intelligent development of cathodic protection. In the future, we should continue to increase the research efforts on the reliability and standardization of the collection system, continuously expand the application field, and provide more powerful technical support for the construction of intelligent pipelines.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An intelligent mobile multifunctional cathodic protection workstation, characterized in that: include: Potentiostat, polarization probe and auxiliary anode; One end of a set number of polarization probes is connected to the protected metal pipe (7) through a cable welding-free joint (5), and the other end is connected to a constant potential instrument; an auxiliary anode is buried in the soil on one side of the protected metal pipe (7) and connected to the constant potential instrument through a cable; the protected metal pipe (7) is detected in real time through the polarization probe, and the protective potential of the current flowing through the protected metal pipe (7) is used as a basis for adjusting the auxiliary anode; The constant potential instrument includes a microprocessor, the microprocessor is connected to a buck-boost power management circuit, the power of the buck-boost power management circuit is input from the Z4 terminal and the Z5 terminal, and the power enters the MPDY power module after passing through lightning protection, overvoltage, current limiting, and anti-backflow and anti-reverse connection protection devices; the MPDY power module regulates the input power, and according to the required output voltage and current requirements, switches the Q1 or Q2 field effect tube to step up or down the input voltage, so as to output a voltage and current that meet the requirements; The polarization probe comprises a shell, the shell has a built-in reference electrode and a polarization test piece, and is filled with a gel drag reducing agent (404), wherein the gel drag reducing agent is gel copper sulfate; The auxiliary anode comprises a seamless steel pipe (616), and a plurality of circular water seepage sieve holes (606) are arranged in an array on the outer side surface of the seamless steel pipe (616), and the circular water seepage sieve holes (606) are blocked by water-soluble sieve hole plugging plugs (605).

2. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The potentiostat adopts a micro-power consumption intelligent cathode protection constant potentiostat (2), comprising a microprocessor, the microprocessor being connected to a data acquisition part voltage adjustment circuit, a 4G communication level conversion circuit, a voltage output control module and an output protection circuit, an MCU and a touch screen power supply circuit, a step-up and step-down power supply management circuit, a touch screen protection and power supply circuit, a pipeline potential data acquisition circuit, a voltage conditioning circuit after data acquisition, an upgrade and debugging serial port circuit, and a related indicator light circuit.

3. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The auxiliary anode adopts a novel quick-installation auxiliary anode (6), comprising a seamless steel pipe (616). The seamless steel pipe (616) is butt-jointed to a cable or a pipe by means of a flange connection plate (608) and fastened and installed by means of high-strength connection bolts (601). A first semi-permeable membrane (603), a second semi-permeable membrane (607), an air guide tube (602), a special cable threading tube (604), a special potential transmission cable (611), a mixed metal oxide anode (612), an anode centralizer (613) and a micro-permeable membrane (614) are arranged in the seamless steel pipe (616); a cable pipe centralizer (609) is arranged inside the upper half of the seamless steel pipe (616) and is filled with an ion drag reducing agent (610); and a high-purity petroleum coke powder (615) is filled in the lower half of the seamless steel pipe (616).

4. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The polarization probe adopts a long-life anti-interference polarization probe (4), comprising a shell, a six-core test cable (401), a test piece (402), an epoxy resin filling (403), a gel resistance reducing agent (404), a copper sulfate crystal (405), a spiral copper core (406), an electrode semi-permeable pottery pot (407) and a backfill material (408). The test piece (402) is installed on the top surface of the shell, and the six-core test cable (401) is arranged at the center of the top surface of the shell. One end of the six-core test cable (401) passes through the backfill material arranged on the bottom surface of the shell. (408), the shell is filled with a gel resistance reducing agent (404), a backfill (408) is arranged at the bottom of the shell, an electrode semi-permeable pottery jar (407) is arranged on the backfill (408), copper sulfate crystals (405) are filled in the electrode semi-permeable pottery jar (407), an epoxy resin potting (403) is arranged on the top of the electrode semi-permeable pottery jar (407), a spiral copper core (406) is installed in the center of the electrode semi-permeable pottery jar (407), one end of the spiral copper core (406) is connected to the backfill (408) and the other end is connected to the epoxy resin potting (403).

5. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The cable welding-free joint (5) comprises a special-shaped metal kit (501), an iron plugging piece (502), a cable (503), a built-in magnet (504), a copper plugging piece (505) and a two-component special copper conductive adhesive (506); the special-shaped metal kit (501) is connected to the pipeline by using the two-component special copper conductive adhesive (506), and the copper plugging piece (505), the built-in magnet (504), the cable (503) and the iron plugging piece (502) are sequentially arranged and installed in the special-shaped metal kit (501).

6. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The cable is a special cable (8) for cathodic protection, which is made of high molecular weight polyethylene and has a copper core arranged inside.

7. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The constant potentiostat is also connected to a solar power supply system (1), and the solar power supply system (1) supplies power to the constant potentiostat.

8. The intelligent movable multifunctional cathodic protection workstation according to claim 1, characterized in that: The gel copper sulfate is prepared by mixing a high-conductivity, cold-resistant and heat-resistant adhesive with copper sulfate and a conductive electrolyte solution.

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