CN109323131B - Gas pipe network subway stray current interference detection system and arrangement method thereof - Google Patents
Gas pipe network subway stray current interference detection system and arrangement method thereof Download PDFInfo
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- CN109323131B CN109323131B CN201811465288.4A CN201811465288A CN109323131B CN 109323131 B CN109323131 B CN 109323131B CN 201811465288 A CN201811465288 A CN 201811465288A CN 109323131 B CN109323131 B CN 109323131B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
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Abstract
The invention relates to a subway stray current interference detection system for a gas pipe network and an arrangement method thereof, wherein the detection system comprises a plurality of detection units which are arranged corresponding to test piles in the gas pipe network, each detection unit comprises a plurality of interference check pieces and a plurality of reference pipes, the interference check pieces are dispersedly embedded at two sides of a gas pipeline, signal wires of the interference check pieces are respectively connected with a wiring device, the wiring device is connected with the gas pipeline, the wiring device is provided with a plurality of first leads and a plurality of second leads, and the first leads and the second leads are provided with wiring terminals; the detection unit also comprises a plurality of potential recorders and reference electrodes, each potential recorder is respectively connected with the first lead and the second lead, and each reference electrode is correspondingly arranged in the soil at the lower end of the reference tube, so that the detection unit has the advantages of simple structure, low cost, flexible use, high detection efficiency, high detection precision and strong practicability; the arrangement method of the detection system has the advantages of simple process and easy implementation.
Description
Technical Field
The invention relates to a stray current interference detection system for a buried pipeline, in particular to a subway stray current interference detection system for a gas pipe network and an arrangement method of the detection system.
Background
With the acceleration of urbanization construction, buried gas pipe networks are becoming more and more complex, and the conditions of parallel and cross laying with subway rails are increasing. The subway can be to bleeding stray current in the soil around in the operation process, and stray current can cause the interference and increase the corruption risk to burying ground gas pipe network. In the prior art, an instantaneous interruption electrical method is usually adopted to detect the cathodic protection potential of a gas pipeline and judge the interference condition and corrosion risk of stray current, but the method has certain defects in practical application, the cathodic protection potential detection cannot be realized when a plurality of groups of anodes cannot be disconnected simultaneously, and the detection result has a larger difference from the actual cathodic protection potential when the stray current exists. Meanwhile, the subway operation has the characteristics of high speed and strong periodicity, the generated stray current is complex and variable, the detection difficulty and error of the transient interruption electric method are further increased, and misjudgment on stray current interference and corrosion risk is easily caused.
Disclosure of Invention
The invention aims to provide a gas pipe network subway stray current interference detection system and an arrangement method thereof, wherein the detection system has the advantages of simple structure, low cost, flexible use, high detection efficiency, high detection precision and strong practicability; the arrangement method has the advantages of simple process and easy implementation.
In order to solve the problems in the prior art, the invention provides a system for detecting the stray current interference of a subway in a gas pipe network, which comprises a plurality of detection units, wherein the detection units are arranged corresponding to test piles in the gas pipe network and comprise a plurality of interference check pieces and a plurality of reference pipes, the interference check pieces are respectively embedded at two sides of the gas pipeline along the axial direction in a dispersing way, and the exposed surfaces of the interference check pieces are opposite to the gas pipeline, signal wires of the interference check pieces are respectively connected with a wiring device arranged in the test piles, the wiring device is connected with the gas pipeline through a cathode test wire, the wiring device is provided with a plurality of first leads which are correspondingly connected with the signal wires of the interference check pieces and a plurality of second leads which are connected with the cathode test wire, and the first leads and the second leads are provided with wiring terminals; the detection unit further comprises a plurality of potential recorders and a plurality of reference electrodes correspondingly connected with the potential recorders, each potential recorder is correspondingly connected with a wiring terminal of the first lead through the first detection line, each potential recorder is connected with a wiring terminal of the second lead through the second detection line, and each reference electrode correspondingly penetrates through the reference tube from top to bottom through the auxiliary rod and is placed in the soil.
Further, the system for detecting the subway stray current interference of the gas pipe network comprises an interference detection sheet, a gas pipeline, a gas sensor and a controller, wherein the center of the interference detection sheet and the axis of the gas pipeline are positioned on the same horizontal plane, and the distance between the interference detection sheet and the gas pipeline is 10-30 cm; the vertical distance between the reference electrode and the interference check sheet is 5-10 cm, and the horizontal distance between the reference electrode and the interference check sheet is less than 5 cm.
Further, the invention relates to a system for detecting the subway stray current interference of a gas pipe network, wherein the exposed area of each interference check sheet is 6.5cm2、20cm2And 50cm2Each group comprises more than three interference check sheets with the same size; the exposed area is 50cm2The interference checking sheet is arranged at one side of the gas pipeline, and the exposed area is 6.5cm2And 20cm2The interference check sheet is arranged at the other side of the gas pipeline.
Further, the system for detecting the interference of the stray current of the gas pipe network subway, disclosed by the invention, is characterized in that the gas pipeline is a pipeline adopting a 3PE (polyethylene) anticorrosive coating or a double-layer FBE (film bulk ethylene) anticorrosive coating, and the plurality of interference checking sheets are divided into the pipelines with the exposed area of 1cm2、6.5cm2And 20cm2Each group comprises more than three interference check sheets with the same size; the exposed area is 20cm2The interference checking sheet is arranged at one side of the gas pipeline, and the exposed area is 1cm2And 6.5cm2The interference check sheet is arranged at the other side of the gas pipeline.
Further, the distance between the interference check sheets on the same side of the gas pipeline is 30-35 cm.
Further, the system for detecting the subway stray current interference of the gas pipe network comprises a reference pipe, a test pile, a pipe cap and a detection device.
The invention provides an arrangement method of the gas pipe network subway stray current interference detection system, which comprises the following steps:
firstly, selecting the arrangement position of a certain detection unit, and excavating the ground until a gas pipeline is exposed to form an operation pit;
secondly, after the exposed surfaces of the interference check pieces are polished by 600-mesh fine sand paper, the interference check pieces are arranged on two sides of the gas pipeline in an axially dispersed manner, and are compacted and fixed by soil;
vertically arranging each reference tube on the upper side of the corresponding interference check sheet, and compacting the lower end of each reference tube by using soil;
fourthly, smoothing out the signal wires of the interference check pieces, penetrating the signal wires into the test pile and connecting the signal wires with a wiring device; connecting a cathode test wire of the wiring device with a fuel gas pipeline;
fifthly, vertically arranging the test pile, enclosing and compacting the lower end of the test pile by using soil, and backfilling the operation pit;
sixthly, connecting each first lead wiring terminal of the wiring device with the second lead terminal respectively;
seventhly, disconnecting each first lead wire connecting terminal of the wiring device from the second lead wire terminal during detection; correspondingly connecting each first lead connecting terminal with a first detection line of each potential recorder, and respectively connecting each second lead terminal with a second detection line of each potential recorder; and each reference electrode correspondingly penetrates through the reference tube from top to bottom through the auxiliary rod and is placed in the soil; detecting the power-off potential of the corresponding interference check sheet through each potential recorder in a set period;
after the detection is finished, the first detection line and the second detection line of each potential recorder are removed, each first lead wiring terminal and each second lead terminal of the wiring device are restored to the connection state, and each reference electrode is taken out from the corresponding reference tube;
and ninthly, finishing the arrangement of all the detection units according to the procedures from the first step to the eighth step.
Compared with the prior art, the fuel gas pipe network subway stray current interference detection system and the arrangement method thereof have the following advantages: the invention sets a plurality of detection units corresponding to a test pile in a gas pipe network, wherein each detection unit comprises a plurality of interference check sheets and a plurality of reference pipes, the interference check sheets are embedded at two sides of a gas pipeline in a dispersing way along the axial direction, the exposed surface of the interference check sheets is opposite to the gas pipeline, signal wires of the interference check sheets are respectively connected with a wiring device arranged in the test pile, the wiring device is connected with the gas pipeline through a cathode test wire, a plurality of first leads correspondingly connected with the signal wires of the interference check sheets and a plurality of second leads connected with the cathode test wire are arranged on the wiring device, and the first leads and the second leads are both provided with wiring terminals; the detection unit further comprises a plurality of potential recorders and a plurality of reference electrodes correspondingly connected with the potential recorders, each potential recorder is correspondingly connected with a wiring terminal of the first lead through the first detection line, each potential recorder is connected with a wiring terminal of the second lead through the second detection line, and each reference electrode correspondingly penetrates through the reference tube from top to bottom through the auxiliary rod and is arranged in the soil. Therefore, the gas pipe network subway stray current interference detection system is simple in structure, low in cost, flexible to use, high in detection efficiency, high in detection precision and strong in practicability. In practical application, according to a set detection period, each potential recorder is enabled to convert the power-on and power-off state at a set power-on and power-off time interval, the power-off potential of the corresponding interference check sheet is acquired at a set delay time during each power-off, and the interference degree and corrosion risk of the stray current of the subway can be accurately judged by analyzing the power-off potential of each interference check sheet. According to the invention, the plurality of interference check pieces are arranged and are embedded on two sides of the gas pipeline in an axially dispersed manner, so that the detection comprehensiveness is improved, different stray current interference sources can be detected, and subway stray current can be distinguished from other stray current sources by combining the characteristics of high subway speed and strong periodicity, so that the subway stray current interference degree and the corrosion risk brought by the subway stray current interference degree can be accurately judged, and targeted countermeasures can be taken. In addition, by arranging the reference tube, the wiring device, the first lead and the second lead, during detection, only the potential recorders are required to be connected with the first lead and the second lead, and the reference electrodes penetrate through the reference tube through the auxiliary rods and are placed in soil; after the detection is completed, the potential recorder and the reference electrode can be removed, and the first lead and the second lead are connected through the connecting terminals thereof, so that the interference check pieces can be polarized. The structure improves the convenience and flexibility of detection and connection, and enables the potential recorder and the reference electrode to be alternately used among a plurality of detection units, so that the utilization rate is improved, and the equipment cost is reduced. The arrangement method of the gas pipe network subway stray current interference detection system provided by the invention has the advantages of simple process and easiness in implementation.
The following describes a system for detecting the subway stray current interference of a gas pipe network and a method for arranging the same in detail with reference to the following specific embodiments shown in the accompanying drawings:
drawings
FIG. 1 is a transverse schematic diagram of a non-detection state of a fuel gas pipe network subway stray current interference detection system according to the present invention;
fig. 2 is a longitudinal schematic view of a detection state of the gas pipe network subway stray current interference detection system of the present invention.
Detailed Description
First, it should be noted that, the directional terms such as up, down, front, rear, left, right, etc. described in the present invention are only described with reference to the accompanying drawings for understanding, and are not intended to limit the technical solution and the claimed scope of the present invention.
As shown in fig. 1 and 2, the specific embodiment of the system for detecting the stray current interference in the subway of the gas pipe network according to the present invention includes a plurality of detecting units corresponding to the testing piles 6 in the gas pipe network. The detection unit comprises a plurality of interference check pieces 1 and a plurality of reference tubes 2. The interference detection pieces 1 are dispersedly embedded at two sides of the gas pipeline 7 along the axial direction, the exposed surfaces of the interference detection pieces are opposite to the gas pipeline 7, and the signal wires 11 of the interference detection pieces 1 are respectively connected with the wiring device 3 arranged in the test pile 6. Let termination 3 be connected with gas pipeline 7 through negative pole test wire 31, set up many first leads of being connected with signal line 11 correspondence of each interference check piece 1 and many second leads of being connected with negative pole test wire 31 on termination 3, and make first lead and second lead all set up binding post. The detection unit further includes a plurality of potentiometers 4 and a plurality of reference electrodes 5 connected to the potentiometers 4. Each potential recorder 4 is correspondingly connected with the connecting terminal of the first lead through the first detection line, and each potential recorder 4 is connected with the connecting terminal of the second lead through the second detection line. Each reference electrode 5 passes through the reference tube 2 from top to bottom through the auxiliary rod 51 and is placed in the soil.
Through the structure, the gas pipe network subway stray current interference detection system is simple in structure, low in cost, flexible to use, high in detection efficiency, high in detection precision and high in practicability. In practical application, according to a set detection period, each potential recorder 4 is enabled to switch the power-on and power-off state at a set power-on and power-off time interval, the power-off potential (cathodic protection potential) of the corresponding interference check sheet 1 is collected at a set delay time during each power-off, and the interference degree and corrosion risk of the stray current of the subway can be accurately judged by analyzing the power-off potential of each interference check sheet 1. According to the invention, the plurality of interference checking pieces 1 are arranged and are embedded on two sides of the gas pipeline 7 in an axially dispersed manner, so that the detection comprehensiveness and efficiency are improved, different stray current interference sources can be detected, and subway stray current can be distinguished from other stray current sources by combining the characteristics of high subway speed and strong periodicity, so that the subway stray current interference degree and the corrosion risk brought by the subway stray current interference degree can be accurately judged, and a targeted countermeasure can be taken. In addition, by arranging the reference tube 2, the wiring device 3, the first lead and the second lead, during detection, only the potential recorders 4 are required to be connected with the first lead and the second lead, and the reference electrodes 5 penetrate through the reference tube 2 through the auxiliary rods 51 and are placed in soil; after the completion of the detection, each potentiometer 4 and the reference electrode 5 can be removed, and each first lead and second lead are connected through their connection terminals so as to polarize each interference check piece 1. The structure improves the convenient flexibility of detection and connection, and enables the potential recorder 4 and the reference electrode 5 to be alternately used among a plurality of detection units, thereby improving the utilization rate and reducing the equipment cost. The potential recorder 4 detects the power-off potential by means of power-on for 12s, power-off for 3s and 200-300 ms delay.
As a specific embodiment, the center of the interference check sheet 1 and the axis of the gas pipeline 7 are on the same horizontal plane, the distance between the interference check sheet 1 and the gas pipeline 7 is 10-30 cm, the vertical distance between the reference electrode 5 and the interference check sheet 1 is 5-10 cm, and the horizontal distance between the reference electrode 5 and the interference check sheet 1 is smaller than 5cm, so that the validity and the reliability of detection data are effectively improved. Meanwhile, aiming at different corrosion prevention types of the gas pipelines, the invention adopts interference check sheets with different exposed areas and arranges the interference check sheets in groups. For the gas pipeline adopting the conventional anticorrosive coating, the anticorrosive performance is poorer, and three groups of exposed areas are respectively 6.5cm2、20cm2And 50cm2And each group of three interference check sheets 1 with the same size are arranged, and the exposed area is 50cm2Interference check ofThe sheet 1 is arranged at one side of the gas pipeline to make the exposed area 6.5cm2And 20cm2Is arranged at the other side of the gas pipeline. Experiments prove that for the gas pipeline of the type, the interference check sheet combination arranged by the structure can be more attached to the actual condition of the gas pipeline, and the reliability and the authenticity of detection can be effectively improved. For the gas pipeline adopting the 3PE anticorrosive coating or the double-layer FBE anticorrosive coating, the anticorrosive performance is better, and three groups of exposed areas are respectively 1cm2、6.5cm2And 20cm2And each group of three interference check sheets 1 with the same size are arranged, and the exposed area is 20cm2The interference check sheet 1 is arranged at one side of the gas pipeline, so that the exposed area is 1cm2And 6.5cm2Is arranged at the other side of the gas pipeline. Experiments prove that for the gas pipeline of the type, the interference check sheet combination arranged by the structure is more attached to the actual condition of the gas pipeline, and the reliability and the authenticity of detection are also improved. The number of interference check pieces 1 in each group is not limited to three, and may be three or more as necessary. In addition, in order to ensure the detection efficiency and reliability, the distance between the interference detection sheets 1 on the same side of the gas pipeline is generally 30-35 cm, the reference pipe 2 and the test pile are both made of PVC pipes, and pipe caps are arranged at the upper ends of the reference pipe 2 and the test pile to prevent water from influencing the detection reliability and authenticity.
Based on the same invention concept, the invention also provides an arrangement method of the gas pipe network subway stray current interference detection system, which specifically comprises the following steps:
firstly, selecting the arrangement position of a certain detection unit, and excavating the ground until a gas pipeline is exposed to form a working pit.
And secondly, after the exposed surface of each interference check sheet 1 is polished by 600-mesh fine sand paper, the exposed surface is arranged on two sides of the gas pipeline in an axially dispersed manner, and each interference check sheet 1 is compacted and fixed by soil.
And thirdly, vertically arranging each reference tube 2 at the upper side of the corresponding interference check sheet 1, and enclosing and compacting the lower end of each reference tube 2 by using soil.
Fourthly, smoothing out the signal wires 11 of the interference check pieces 1, penetrating the signal wires into the test pile and connecting the signal wires with the wiring device 3; the cathode test line 31 of the junction device 3 is connected to the gas pipe.
And fifthly, vertically arranging the test pile, enclosing and compacting the lower end of the test pile by using soil, and backfilling the operation pit.
Sixthly, connecting each first lead connecting terminal of the wiring device 3 with the second lead terminal respectively, and polarizing each interference check sheet 1.
Seventhly, disconnecting each first lead wire connecting terminal of the wiring device 3 from the second lead terminal during detection; connecting each first lead connecting terminal correspondingly to the first detection line of each potential recorder 4, and connecting each second lead terminal respectively to the second detection line of each potential recorder 4; and each reference electrode 5 passes through the reference tube 2 from top to bottom through the auxiliary rod 51 and is placed in the soil. The power-off potential of the corresponding interference check chip 1 is detected by each potential recorder 4 at a set period. The subway stray current interference degree and the corrosion risk can be accurately judged by analyzing the power-off potential of each interference check sheet. According to the periodic characteristic of subway operation, the invention generally sets the period as 24 hours to ensure the comprehensiveness of detection.
And eighthly, after the detection is finished, removing the first detection line and the second detection line of each potential recorder 4, restoring the connection state of each first lead wiring terminal and the second lead terminal of the wiring device 3, and simultaneously taking each reference electrode 5 out of the corresponding reference tube 2.
And ninthly, finishing the arrangement of all the detection units according to the procedures from the first step to the eighth step.
The arrangement method of the fuel gas pipe network subway stray current interference detection system has the advantages of simple process and easiness in implementation, and the interference risk of the subway stray current on a fuel gas pipeline can be evaluated by detecting the power-off potential of each interference check sheet 1, so that targeted countermeasures can be adopted, and the safety is improved.
The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by the skilled in the art according to the technical solution of the present invention should fall within the scope of the invention defined by the claims without departing from the spirit of the present invention.
Claims (6)
1. The system for detecting the stray current interference of the subway of the gas pipe network is characterized by comprising a plurality of detection units which are arranged corresponding to a test pile in the gas pipe network, wherein each detection unit comprises a plurality of interference detection pieces (1) and a plurality of reference pipes (2), the interference detection pieces (1) are buried at two sides of the gas pipeline in an axially dispersed mode and enable exposed surfaces of the interference detection pieces to be opposite to the gas pipeline, signal wires (11) of the interference detection pieces (1) are respectively connected with a wiring device (3) arranged in the test pile, the wiring device (3) is connected with the gas pipeline through a cathode test wire (31), the wiring device (3) is provided with a plurality of first leads which are correspondingly connected with the signal wires (11) of the interference detection pieces (1) and a plurality of second leads which are connected with the cathode test wire (31), and the first leads and the second leads are provided with wiring terminals; the detection unit further comprises a plurality of potential recorders (4) and a plurality of reference electrodes (5) correspondingly connected with the potential recorders (4), each potential recorder (4) is correspondingly connected with a wiring terminal of a first lead through a first detection line, each potential recorder (4) is correspondingly connected with a wiring terminal of a second lead through a second detection line, and each reference electrode (5) correspondingly penetrates through the reference tube (2) from top to bottom through an auxiliary rod (51) and is placed in soil; the plurality of interference check sheets (1) are divided into exposed areas of 6.5cm2、20cm2And 50cm2Each group comprises more than three interference check sheets (1) with the same size; the exposed area is 50cm2The interference check sheet (1) is arranged at one side of the gas pipeline, and the exposed area is 6.5cm2And 20cm2The interference check sheet (1) is arranged at the other side of the gas pipeline.
2. The utility model provides a gas pipe network subway stray current interference detecting system which characterized in that, includes a plurality of detecting element that correspond the setting with the test stake in the gas pipe network, detecting element packageThe gas pipeline testing device comprises a plurality of interference checking pieces (1) and a plurality of reference tubes (2), wherein the interference checking pieces (1) are dispersedly embedded at two sides of a gas pipeline along the axial direction and enable the exposed surface of the gas pipeline to be opposite to the gas pipeline, a signal wire (11) of each interference checking piece (1) is respectively connected with a wiring device (3) arranged in a testing pile, the wiring device (3) is connected with the gas pipeline through a cathode testing wire (31), the wiring device (3) is provided with a plurality of first lead wires correspondingly connected with the signal wires (11) of each interference checking piece (1) and a plurality of second lead wires connected with the cathode testing wire (31), and the first lead wires and the second lead wires are provided with wiring terminals; the detection unit further comprises a plurality of potential recorders (4) and a plurality of reference electrodes (5) correspondingly connected with the potential recorders (4), each potential recorder (4) is correspondingly connected with a wiring terminal of a first lead through a first detection line, each potential recorder (4) is correspondingly connected with a wiring terminal of a second lead through a second detection line, and each reference electrode (5) correspondingly penetrates through the reference tube (2) from top to bottom through an auxiliary rod (51) and is placed in soil; the gas pipeline is a pipeline adopting a 3PE anticorrosive coating or a double-layer FBE anticorrosive coating, and the plurality of interference checking pieces (1) are divided into exposed areas of 1cm2、6.5cm2And 20cm2Each group comprises more than three interference check sheets (1) with the same size; the exposed area is 20cm2The interference checking sheet (1) is arranged at one side of the gas pipeline, and the exposed area is 1cm2And 6.5cm2The interference check sheet (1) is arranged at the other side of the gas pipeline.
3. The system for detecting the interference of the stray current of the gas pipe network subway as claimed in claim 1 or 2, wherein the center of said interference check sheet (1) and the axis of the gas pipeline are in the same horizontal plane, and the distance between the interference check sheet (1) and the gas pipeline is 10-30 cm; the vertical distance between the reference electrode (5) and the interference check sheet (1) is 5-10 cm, and the horizontal distance between the reference electrode (5) and the interference check sheet (1) is less than 5 cm.
4. The system for detecting the interference of the stray current of the gas pipe network subway as claimed in claim 3, wherein the distance between the interference check sheets (1) on the same side of the gas pipeline is 30-35 cm.
5. The gas pipe network subway stray current interference detection system of claim 4, characterized in that, reference pipe (2) and test stake are PVC pipe, and the upper end of reference pipe (2) and test stake are all equipped with the pipe cap.
6. An arrangement method of the gas pipe network subway stray current interference detection system as claimed in claim 5, characterized by comprising the following steps:
firstly, selecting the arrangement position of a certain detection unit, and excavating the ground until a gas pipeline is exposed to form an operation pit;
secondly, after the exposed surfaces of the interference check pieces (1) are polished by 600-mesh fine sand paper, the interference check pieces are axially arranged on two sides of the gas pipeline in a dispersed manner, and the interference check pieces (1) are compacted and fixed by soil;
thirdly, vertically arranging the reference tubes (2) on the upper sides of the corresponding interference check sheets (1), and enclosing and compacting the lower ends of the reference tubes (2) by using soil;
fourthly, smoothing out the signal wires (11) of the interference check pieces (1), penetrating the signal wires into the test pile and connecting the signal wires with the wiring device (3); connecting the wiring device (3) with a fuel gas pipeline through a cathode test wire (31);
fifthly, vertically arranging the test pile, enclosing and compacting the lower end of the test pile by using soil, and backfilling the operation pit;
sixthly, connecting each first lead wiring terminal of the wiring device (3) with the second lead terminal respectively;
seventhly, disconnecting each first lead wire connecting terminal of the wiring device (3) from the second lead terminal during detection; connecting each first lead connecting terminal with a first detection line of each potential recorder (4) correspondingly, and connecting each second lead terminal with a second detection line of each potential recorder (4) respectively; each reference electrode (5) correspondingly penetrates through the reference tube (2) from top to bottom through the auxiliary rod (51) and is placed in the soil; detecting the power-off potential of the corresponding interference check sheet (1) through each potential recorder (4) in a set period;
after the detection is finished, the first detection line and the second detection line of each potential recorder (4) are removed, each first lead wiring terminal and each second lead terminal of the wiring device (3) are restored to the connection state, and each reference electrode (5) is taken out of the corresponding reference tube (2);
and ninthly, finishing the arrangement of all the detection units according to the procedures from the first step to the eighth step.
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| CN111575717A (en) * | 2020-05-09 | 2020-08-25 | 中核武汉核电运行技术股份有限公司 | Inserting device for buried pipe anticorrosive coating damage simulation test piece |
| CN113944892B (en) * | 2021-11-09 | 2024-04-30 | 北京江河惠远科技有限公司 | Automatic monitoring method and device for mud-water critical state of riverbed area for long oil pipeline |
| CN115823503A (en) * | 2022-11-29 | 2023-03-21 | 北京市燃气集团有限责任公司 | Community gas pipeline corrosion hotspot field test and identification method |
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| CN203849201U (en) * | 2014-03-10 | 2014-09-24 | 中国海洋石油总公司 | Platform corrosion potential measuring device |
| CN104894571A (en) * | 2015-06-03 | 2015-09-09 | 青岛雅合阴保工程技术有限公司 | Cathode protection power supply device with electric drainage function and operating method of cathode protection power supply device |
| CN107145685A (en) * | 2017-06-06 | 2017-09-08 | 北京市燃气集团有限责任公司 | The dynamic DC influence monitoring system of pipeline based on the Big Dipper and methods of risk assessment |
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