CN117286504A - Cathode protection potential remote monitoring device for buried steel pipeline - Google Patents
Cathode protection potential remote monitoring device for buried steel pipeline Download PDFInfo
- Publication number
- CN117286504A CN117286504A CN202311286603.8A CN202311286603A CN117286504A CN 117286504 A CN117286504 A CN 117286504A CN 202311286603 A CN202311286603 A CN 202311286603A CN 117286504 A CN117286504 A CN 117286504A
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- module
- monitoring
- test piece
- female
- pile body
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 238000012806 monitoring device Methods 0.000 title claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 63
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 230000010287 polarization Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000004210 cathodic protection Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 13
- 238000009960 carding Methods 0.000 claims description 8
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 12
- 238000005259 measurement Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000005059 dormancy Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000007958 sleep Effects 0.000 description 1
- 230000004622 sleep time Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/04—Controlling or regulating desired parameters
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to the technical field of pipeline monitoring, in particular to a cathode protection potential remote monitoring device for a buried steel pipeline; the device comprises a female protection pile body and a monitoring mechanism arranged in the female protection pile, wherein a detection module is further arranged at one end of the female protection pile body, which is close to a pipeline, and is provided with a connecting element, a polarization test piece and a reference electrode which are communicated with the connecting element through a cable, and the polarization test piece and the reference electrode are buried underground; the wireless transmission module is fixedly arranged at the inner top of the female protection pile body and communicated with the monitoring mechanism, and is used for sending current information detected by the monitoring mechanism to the cloud server; the female protection pile body is internally provided with a power supply module for supplying power to the monitoring mechanism; the invention not only can monitor the operation data of each female pile body in real time, but also can automatically enter the dormant state in the non-working state, thereby ensuring the continuous voyage state of the equipment, and having high detection precision and good effect.
Description
Technical Field
The invention relates to the technical field of pipeline monitoring, in particular to a cathode protection potential remote monitoring device for a buried steel pipeline.
Background
The cathode protection system is an indispensable part in the corrosion protection of the steel oil and gas long-distance pipeline, and the two modes can generate effective corrosion protection for the steel oil and gas long-distance pipeline by utilizing a sacrificial anode or forced current protection mode. The operation parameters of the cathode protection pile of the traditional steel oil gas long-distance pipeline require personnel to carry relevant measurement equipment to the cathode protection test pile to carry out field measurement operation, and the manual measurement is time-consuming and labor-consuming and has measurement errors.
Disclosure of Invention
According to the device for remotely monitoring the cathode protection potential of the buried steel pipeline, the device capable of remotely detecting the cathode protection test pile in real time is provided, so that the technical problem that relevant detection equipment is required to be carried to the cathode protection pile to be detected on site in the prior art when the cathode protection test device is detected is solved.
The invention provides a buried steel pipeline cathode protection potential remote monitoring device, which aims to solve the problems in the prior art, and comprises a female protection pile body and a monitoring mechanism arranged in the female protection pile, wherein one end of the female protection pile body, which is close to a pipeline, is also provided with a detection module, the detection module is provided with a connecting element, a polarization test piece and a reference electrode, which are communicated with the connecting element through a cable, and the polarization test piece and the reference electrode are buried underground; the monitoring mechanism is used for collecting the potential of the pipeline and the reference electrode, the potential of the polarized test piece and the reference electrode and the current information between the pipeline and the sacrificial anode; the wireless transmission module is fixedly arranged at the inner top of the female protection pile body and communicated with the monitoring mechanism, and is used for sending current information detected by the monitoring mechanism to the cloud server; the female protection pile is characterized in that a power supply module for supplying power to the monitoring mechanism is further arranged in the female protection pile body.
Preferably, the connecting element comprises a first connecting head, a second connecting head, a third connecting head, a fourth connecting head, a fifth connecting head and a sixth connecting head; the first connector is connected with the pipeline through a cable; the second connector is connected with a reference electrode through a cable; the third joint is connected with the polarization test pieces through a cable, and the polarization test pieces are provided with a plurality of groups of test pieces which are divided into natural point test pieces and power-off point test pieces; the fourth joint is connected with the test piece at the power-off point through a cable; the fifth joint is connected with the alternating current test piece through a cable; the sixth joint is grounded through a cable.
Preferably, the monitoring mechanism comprises a monitoring carding module, a communication module, an isolation circuit module, a lightning protection anti-interference module, a power management module and a clock module.
Preferably, the monitoring and carding module further comprises a CPU, a RAM and a ROM.
Preferably, the communication module further comprises a GPS chip, a GSM chip, a power amplification chip, an antenna and a sim card.
Preferably, the power management module comprises a power management chip and an automatic wake-up circuit.
Preferably, the clock module is a clock chip.
Preferably, the power supply module is a storage battery.
Preferably, the top of the female protection pile body is also fixedly provided with a nameplate and a test door arranged on the side wall of the female protection pile body.
Preferably, the reference electrode is a saturated calomel electrode.
Compared with the prior art, the invention has the beneficial effects that:
the invention realizes the work of remote real-time detection of the pipeline by the monitoring mechanism, and realizes the measurement of negative potential, natural potential, power-off potential, alternating current interference voltage, alternating current stray current and direct current, and basically covers all cathode protection monitoring related data of the buried steel oil gas pipeline.
According to the invention, the power management module and the clock module are used for realizing the work of regularly waking up the equipment in the dormant state and reminding the under-voltage of the battery, realizing the automatic adjustment of the equipment to the dormant state in the non-working state, ensuring the cruising ability of the equipment, and simultaneously realizing the work of remotely transmitting the detection data to the cloud server by matching with the wireless transmission module, so that the remote detection of the pipeline is realized, and the equipment is not required to be carried to the detection point manually.
Drawings
Fig. 1 is a perspective view of a remote monitoring device for cathodic protection potential of a buried steel pipeline.
Fig. 2 is a front view of a part of the structure of a connecting element of a remote monitoring device for cathodic protection potential of a buried steel pipeline.
Fig. 3 is a circuit diagram of the operation of a remote monitoring device for cathodic protection potential of a buried steel pipeline.
The reference numerals in the figures are:
1-a female pile body; 11-nameplate; 12-test gate;
2-a monitoring mechanism;
3-a detection module; 31-a connecting element; 32-a cable; 33-polarizing test piece; 34-a reference electrode;
4-a wireless transmission module;
5-a power supply module;
6-pipeline.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
See fig. 1 to 3: the cathode protection potential remote monitoring device for the buried steel pipeline comprises a female protection pile body 1 and a monitoring mechanism 2 arranged in the female protection pile, wherein one end, close to a pipeline 6, of the female protection pile body 1 is also provided with a detection module 3, the detection module 3 is provided with a connecting element 31, a polarization test piece 33 and a reference electrode 34 which are communicated with the connecting element 31 through a cable 32, and the polarization test piece 33 and the reference electrode 34 are buried underground; the monitoring mechanism 2 is used for collecting the electric potentials of the pipeline 6 and the reference electrode 34, the electric potentials of the polarized test piece 33 and the reference electrode 34 and the current information between the pipeline 6 and the sacrificial anode; the wireless transmission module 4 is fixedly arranged at the inner top of the female pile body 1 and communicated with the monitoring mechanism 2, and the wireless transmission module 4 is used for sending current information detected by the monitoring mechanism 2 to the cloud server; the female protection pile body 1 is internally provided with a power supply module 5 for supplying power to the monitoring mechanism 2.
In the working state, when the pipeline 6 is required to be remotely detected in real time, firstly determining the female protection pile body 1 of the monitoring mechanism 2, then manually excavating a pit with the size of 40cm x 80cm, soaking the polarized test piece 33 and the reference electrode 34 in water, and then placing the test piece and the reference electrode into the pit for embedding; the cable 32 of the polarization test piece 33 and the reference electrode 34 is connected with the connecting element 31 by penetrating into the cathode protection pile through the hole at the bottom of the cathode protection pile; in installing the monitoring mechanism 2 into the cathode protection piles, and connecting the test wires to the correct positions respectively; after the connection of the test line is finished, the wireless transmission module 4 is connected to the monitoring mechanism 2 and penetrates out through a hole at the upper part of the female protection pile body 1 to be fixed at the upper part of the cathode protection pile; after the wireless transmission module 4 is fixed, the monitoring mechanism 2 is communicated with the power supply module, the equipment and the communication module are debugged through the debugging tool, monitoring point data are uploaded to the cloud server or the local data server through the communication module, finally, the cloud server or the local data server is used for receiving the negative protection potential, the natural potential, the outage potential, the alternating current interference voltage, the alternating current stray current and the direct current monitoring data of each monitoring point on site, and then, the integrated monitoring data and abnormal data alarm information are pushed to the PC client, so that the real-time monitoring of the cathode protection pile data of the buried steel oil and gas pipeline 6 is realized.
See fig. 1 and 2: the connecting element 31 includes a first connector, a second connector, a third connector, a fourth connector, a fifth connector, and a sixth connector; the first connector is connected with the pipeline 6 by a cable 32; the second connector is connected with a reference electrode 34 through a cable 32; the third joint is connected with the polarization test piece 33 through the cable 32, and the polarization test piece 33 is provided with a plurality of groups of test pieces divided into a natural point test piece and a power-off point test piece; the fourth joint is connected with the test piece at the power-off point through a cable 32; the fifth joint is connected with the alternating current test piece through a cable 32; the sixth connector is grounded via cable 32.
In the working state, the reference electrode 34 is arranged adjacent to the pipeline 6, and in the cathodic protection state, the pipeline 6 is protected from corrosion by applying a certain negative potential on the surface of the pipeline 6; the reference electrode 34 is used to monitor the potential difference between the pipe 6 and the soil at this time to determine whether the cathodic protection system is operating properly and the potential difference between the reference electrode 34 and the pipe 6 is called the polarization potential; by periodically measuring the polarization potential between the reference electrode 34 and the conduit 6, it can be determined whether the cathodic protection system requires adjustment or maintenance; if the polarization potential is too high, the power supply of the cathode protection system is too strong, and the power supply needs to be reduced; if the polarization potential is too low, the cathode protection system is insufficient in power supply, and the power supply needs to be increased; the reference electrode 34 is used for providing a stable potential reference for monitoring and controlling the cathodic protection of the pipeline 6; it ensures proper protection of the steel pipe 6, extends its service life and reduces the damage caused by corrosion. The main function of the test strip is to evaluate and monitor the effectiveness of the cathodic protection system. By periodically measuring the corrosion rate and the potential on the test piece, it can be judged whether the steel pipe 6 is effectively protected; the test piece is used for feeding back the corrosion rate, the corrosion rate on the test piece can reflect the corrosion environment of the soil around the pipeline 6, the corrosion rate on the test piece can be measured regularly to judge whether the cathode protection system can effectively slow down the corrosion rate of the steel pipeline 6, and meanwhile, the electric potential on the test piece and the corrosion distribution of the test piece can be also used for evaluating the working condition of the cathode protection system; through monitoring and analysis of the test piece, the corrosion problem of the buried steel pipeline 6 can be found and solved in time, the effectiveness of a cathode protection system is ensured, and the service life of the pipeline 6 is prolonged.
See fig. 1: the monitoring mechanism 2 comprises a monitoring carding module, a communication module, an isolation circuit module, a lightning protection anti-interference module, a power management module and a clock module.
In the working state, the monitoring and carding module is used for collecting, processing and storing various data; the power management module and the clock module: the device is used for equipment dormancy awakening and battery under-voltage reminding and comprises a power management module chip, an automatic awakening circuit, a clock chip, a lithium battery pack and the like; and a communication module: the monitoring system is used for positioning and communicating equipment and uploading monitoring data to a cloud server or a local data server; isolation circuit module: the power management module is used for isolating the power management module from the tested body; and the lightning protection anti-interference module is as follows: the lightning protection device is used for monitoring the lightning protection of the mechanism 2 in an outdoor installation operation state, wherein the communication module can select 4G or NB-IoT communication according to the actual situation of the site.
See fig. 1: the monitoring and carding module also comprises a CPU, a RAM and a ROM.
In the working state, the monitoring and carding module realizes the processing and storage work of data when collecting various data through the CPU, the RAM and the ROM.
See fig. 1: the communication module also comprises a GPS chip, a GSM chip, a power amplification chip, an antenna and a sim card.
In the working state, the communication module is used for matching with a GPS chip, a GSM chip, a power amplification chip, an antenna and a sim card to realize real-time positioning and communication work of equipment when monitoring the pipeline 6 remotely.
See fig. 1: the power management module comprises a power management chip and an automatic wake-up circuit.
Under the operating condition, the power management chip and the automatic wake-up circuit are used for controlling the sleep time of the equipment in real time and realizing fixed-point annular work of the equipment by matching with the automatic wake-up circuit when the detection data is required to be transmitted towards the cloud server, so that the equipment is in the sleep state at all times under the non-operating condition, and the cruising ability of the equipment is guaranteed to the greatest extent.
See fig. 1: the clock module is a clock chip.
Under the operating condition, the clock chip works in real time in cooperation with the power management module, and the power management module is matched to time the dormancy time of the equipment, so that the equipment can wake up at fixed points in cooperation with the power management module to detect the pipeline 6, and detection data are transmitted to the cloud server through the monitoring mechanism 2.
See fig. 1: the power supply module 5 is a storage battery.
In the working state, the storage battery is a 7.2V battery pack, and works in combination with an automatic wake-up circuit, the equipment wakes up once a day and the rest time is in a dormant state, so that the power consumption is reduced, and the monitoring mechanism 2 can send monitoring data to the center platform every day; the monitoring data comprise negative potential, natural potential, power-off potential, alternating current interference voltage, alternating current stray current and direct current; the invention can also be applied to daily monitoring of cathode protection systems of buried steel long-distance pipelines 6, wharf steel structures and the like.
See fig. 1: the top of the female protection pile body 1 is also fixedly provided with a nameplate 11 and a test door 12 arranged on the side wall of the female protection pile body 1.
In the working state, the nameplate 11 is used for engraving detailed information and warning slogans of the current female security pile body 1; the side view door that the stake body 1 lateral wall was protected to the yin is then for supplying the staff to protect stake body 1 inside detection module 3 intercommunication setting through outside check out test set to obtain detection information.
See fig. 2 and 3: the reference electrode 34 is a saturated calomel electrode.
In the working state, the saturated calomel electrode is preferably adopted as the reference electrode 34, so that the reference electrode 34 has better stability, high conductivity, easy calibration, quick response and wide potential range, and can provide reliable reference potential for electrochemical tests.
The invention not only can monitor the operation data of each female pile body in real time, but also can automatically enter the dormant state in the non-working state, thereby ensuring the continuous voyage state of the equipment, and having high detection precision and good effect.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
1. The device is characterized by comprising a female protection pile body (1) and a monitoring mechanism (2) arranged in the female protection pile, wherein one end of the female protection pile body (1) close to a pipeline (6) is further provided with a detection module (3), the detection module (3) is provided with a connecting element (31) and a polarization test piece (33) and a reference electrode (34) which are communicated with the connecting element (31) through a cable (32), and the polarization test piece (33) and the reference electrode (34) are buried underground; the monitoring mechanism (2) is used for collecting the potential of the pipeline (6) and the reference electrode (34), the potential of the polarized test piece (33) and the reference electrode (34) and the current information between the pipeline (6) and the sacrificial anode; the wireless transmission module (4) is fixedly arranged at the inner top of the female pile body (1) and is communicated with the monitoring mechanism (2), and the wireless transmission module (4) is used for sending current information detected by the monitoring mechanism (2) to the cloud server; and a power supply module (5) for supplying power to the monitoring mechanism (2) is further arranged in the female protection pile body (1).
2. A device for remote monitoring of cathodic protection potential of buried steel pipe according to claim 1, wherein the connecting element (31) comprises a first connector, a second connector, a third connector, a fourth connector, a fifth connector and a sixth connector; the first connector is connected with the pipeline (6) through a cable (32); the second joint is connected with a reference electrode (34) through a cable (32); the third joint is connected with a polarization test piece (33) through a cable (32), and the polarization test piece (33) is provided with a plurality of groups of test pieces which are divided into a natural point test piece and a power-off point test piece; the fourth joint is connected with the test piece at the power-off point through a cable (32); the fifth joint is connected with the alternating current test piece through a cable (32); the sixth connector is grounded via a cable (32).
3. The device for remotely monitoring the cathodic protection potential of a buried steel pipeline according to claim 1, wherein the monitoring mechanism (2) comprises a monitoring carding module, a communication module, an isolating circuit module, a lightning protection anti-interference module, a power management module and a clock module.
4. A device for remotely monitoring the cathodic protection potential of a buried steel pipe according to claim 3, wherein the monitoring and carding module further comprises a CPU, RAM and ROM.
5. A device for remotely monitoring the cathodic protection potential of a buried steel pipeline according to claim 3, wherein the communication module further comprises a GPS chip, a GSM chip, a power amplifier chip, an antenna, and a sim card.
6. A device for remotely monitoring the cathodic protection potential of a buried steel pipe according to claim 3, wherein the power management module comprises a power management chip and an automatic wake-up circuit.
7. A device for remotely monitoring the cathodic protection potential of a buried steel pipeline according to claim 3, wherein said clock module is a clock chip.
8. The device for remotely monitoring the cathodic protection potential of a buried steel pipeline according to claim 1, wherein said power supply module (5) is a battery.
9. The remote monitoring device for the cathodic protection potential of the buried steel pipeline according to claim 1 is characterized in that a nameplate (11) and a test door (12) arranged on the side wall of the female protection pile body (1) are fixedly arranged at the top of the female protection pile body (1).
10. A buried steel pipe cathodic protection potential remote monitoring device according to claim 1, wherein the reference electrode (34) is a saturated calomel electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311286603.8A CN117286504A (en) | 2023-09-28 | 2023-09-28 | Cathode protection potential remote monitoring device for buried steel pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311286603.8A CN117286504A (en) | 2023-09-28 | 2023-09-28 | Cathode protection potential remote monitoring device for buried steel pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117286504A true CN117286504A (en) | 2023-12-26 |
Family
ID=89240538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311286603.8A Pending CN117286504A (en) | 2023-09-28 | 2023-09-28 | Cathode protection potential remote monitoring device for buried steel pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117286504A (en) |
-
2023
- 2023-09-28 CN CN202311286603.8A patent/CN117286504A/en active Pending
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