CN210127273U - Sleeve insulation monitoring device - Google Patents
Sleeve insulation monitoring device Download PDFInfo
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- CN210127273U CN210127273U CN201920932676.2U CN201920932676U CN210127273U CN 210127273 U CN210127273 U CN 210127273U CN 201920932676 U CN201920932676 U CN 201920932676U CN 210127273 U CN210127273 U CN 210127273U
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- Prior art keywords
- test piece
- sleeve
- pipeline
- potential
- potential test
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- 238000009413 insulation Methods 0.000 title claims abstract description 23
- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000011810 insulating material Substances 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004210 cathodic protection Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A sleeve insulation monitoring device comprises a monitor and a measuring unit; the measuring unit comprises a reference tube, a reference electrode, a pipeline potential test piece and a sleeve potential test piece which are buried in the soil; the reference tube is a tube made of insulating materials, the reference electrode is positioned in the reference tube, and the top ends of the pipeline potential test piece and the sleeve potential test piece are flush with the end face of the bottom end of the reference tube; the pipeline is electrically connected with the pipeline potential test piece through a first lead, and a first control switch is arranged on the first lead; the sleeve and the sleeve potential test piece are electrically connected through a second lead, and a second control switch is arranged on the second lead; the reference electrode, the pipeline potential test piece and the sleeve potential test piece are all electrically connected with the monitor. The sleeve insulation monitoring device eliminates the IR drop interference generated by stray current when the reference electrode carries out potential detection on the pipeline and the sleeve by arranging the reference tube and the test piece, so that the obtained potential data are accurate, and the accuracy of judging the insulation state between the sleeve and the pipeline is ensured.
Description
Technical Field
The utility model belongs to the technical field of pipeline cathodic protection, especially, relate to a sleeve pipe insulation monitoring devices.
Background
When a long oil and gas pipeline passes through a roadbed such as a highway, a railway and the like, in order to avoid adverse effects of ground load on the pipeline, a sleeve is usually arranged at the passing part, and the sleeve is sleeved outside the pipeline to protect the pipeline. When the steel sleeve is adopted, in order to guarantee effectiveness of cathodic protection of the main pipeline, the insulation of the main pipeline and the steel sleeve is guaranteed by installing an insulating support on the main pipeline in the sleeve.
The trunk line must be good with the sleeve pipe is insulating, if the short circuit overlap joint appears, will lead to cathodic protection electric current to run off to the sleeve pipe from the trunk line on, the trunk line can not get cathodic protection, can lead to the trunk line to take place to corrode.
In the prior art, the potential of a main pipeline and the potential of a sleeve are manually measured, and whether short circuit exists is judged according to the potential difference between the main pipeline and the sleeve, so that the measurement is not in time, and abnormality is difficult to find in time; and because the portable reference electrode on the earth surface is adopted for potential measurement, the IR drop generated by the cathodic protection current and the stray current can interfere with the potential measurement, thereby influencing the accuracy of the potential measurement and further influencing the accuracy of insulation judgment.
SUMMERY OF THE UTILITY MODEL
The utility model discloses there is the poor problem of measurement accuracy nature to above-mentioned current sleeve pipe monitoring mode, provides a measure accurate sleeve pipe insulation monitoring devices.
In order to achieve the above object, the utility model discloses a technical scheme be:
a sleeve insulation monitoring device is used for monitoring the insulation state between a sleeve and a pipeline and comprises a monitor and a measuring unit;
the measuring unit comprises a reference tube, a reference electrode, a pipeline potential test piece and a sleeve potential test piece which are buried in the soil;
the reference tube is a tube made of an insulating material, the reference electrode is positioned in the reference tube, and the top ends of the pipeline potential test piece and the sleeve potential test piece are flush with the end face of the bottom end of the reference tube;
the pipeline is electrically connected with the pipeline potential test piece through a first lead, and a first control switch is arranged on the first lead to control the connection and disconnection of the electric connection between the pipeline and the pipeline potential test piece;
the sleeve and the sleeve potential test piece are electrically connected through a second lead, and a second control switch is arranged on the second lead to control the on-off of the electrical connection between the sleeve and the sleeve potential test piece;
the reference electrode, the pipeline potential test piece and the sleeve potential test piece are electrically connected with the monitor so that the monitor can carry out potential detection.
Preferably, the first control switch and the second control switch are both arranged in the monitor, so that the monitor controls the on-off of the monitor.
Preferably, the first control switch divides the first lead into a pipeline connecting section and a first test block connecting section, and the monitor is electrically connected with the pipeline potential test block through the first test block connecting section;
the second control switch divides the second lead into a sleeve connecting section and a second test block connecting section, and the monitor is electrically connected with the sleeve potential test block through the second test block connecting section.
Preferably, the pipeline potential test piece and the sleeve potential test piece are both provided with exposed parts which are in contact with soil, and the surface areas of the exposed parts are the same.
Compared with the prior art, the utility model discloses an advantage lies in with positive effect:
1. the sleeve insulation monitoring device eliminates the IR drop interference generated by stray current when the reference electrode carries out potential detection on the pipeline and the sleeve by arranging the reference tube and the test piece, so that the obtained potential data are accurate, and the accuracy of judging the insulation state between the sleeve and the pipeline is ensured.
2. Control switch all sets up in the monitor, makes switching on of pipeline and sleeve pipe and test block can carry out automated control to realize insulating state's intelligent detection, thereby can improve measuring frequency, in time discover unusually.
3. The monitor is conducted with the test block through the first lead and the second lead, the electrical connection structure of the device is simplified, and the electric potentials of the pipeline and the sleeve can be detected more accurately.
4. The exposed areas of the pipeline potential test piece and the sleeve potential test piece are the same, so that the polarization effects of the two test pieces are the same, and the accuracy of the measured potential data of the reference electrode is ensured.
Drawings
Fig. 1 is a schematic structural view of the casing insulation monitoring device of the present invention;
in the above figures: 1. a sleeve; 2. a pipeline; 3. a monitor; 4. a measuring unit; 41. a reference tube; 42. a reference electrode; 43. a pipeline potential test piece; 44. a casing potential test piece; 5. a first conductive line; 51. a pipe connection section; 52. a first test piece connecting section; 6. a second conductive line; 61. a casing connection section; 62. a second test piece connecting section; k1, a first control switch; k2, a second control switch.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the utility model provides a sleeve pipe insulation monitoring devices for to burying sleeve pipe 1 and pipeline 2 underground in soil underground, whether both are in insulating state and monitor.
The sleeve insulation monitoring device comprises a monitor 3 and a measuring unit 4.
The measuring unit 4 includes a reference tube 41 buried in the underground soil, a reference electrode 42, a tube potential test piece 43, and a sleeve potential test piece 44.
The reference tube 41 is made of an insulating material, and is filled with soil.
The reference electrode 42 is positioned in the reference tube 41, and the pipeline potential test piece 43 and the sleeve potential test piece 44 are positioned outside the reference tube 3, so that the test pieces are fully polarized.
The top of pipeline potentiometric test piece 43 and sleeve potentiometric test piece 44 all is parallel and level with the terminal surface of reference tube 41 bottom, makes the soil between reference electrode 42 and the test piece all be located reference tube 41, can not receive the influence that underground stray current produced IR and drop, and the potentiometric data who records are accurate.
The pipeline 2 and the pipeline potential test piece 43 are electrically connected through a first lead 5, and a first control switch K1 is installed on the first lead 5. The bushing 1 and the bushing electric potential test piece 44 are electrically connected through a second lead 6, and a second control switch K2 is installed on the second lead 6.
The reference electrode 42, the pipeline potential test piece 43 and the sleeve potential test piece 44 are all electrically connected with the monitor 3.
The first control switch K1 is closed, so that the electrical connection between the pipeline 2 and the pipeline potential test piece 43 is conducted, and the pipeline potential test piece 43 is sufficiently polarized, so that the pipeline potential test piece is the same as the potential of the pipeline 2; the second control switch K2 is closed, the electrical connection between the sleeve 1 and the sleeve potentiometric test piece 44 is conducted, and the sleeve potentiometric test piece 44 is sufficiently polarized to make the potential of the sleeve 1 the same.
When the first control switch K1 and the second control switch K2 are both in the closed state, the monitor 3 simultaneously measures the potential difference between the reference electrode 42 and the pipeline potential test piece 43 and the potential difference between the reference electrode 42 and the casing potential test piece 44, so as to measure the electrified potential V of the pipelineon1And the current potential V of the bushingon2。
After the first control switch K1 and the second control switch K2 are turned off simultaneously and delayed for the same set time, the monitor 3 simultaneously measures the potential difference between the reference electrode 42 and the pipeline potential test piece 43 and the potential difference between the reference electrode 42 and the casing potential test piece 44, thereby measuring the power-off potential V of the pipelineoff1And the off potential V of the bushingoff2。
The monitor 3 performs difference operation on the detected power-off potential and the detected power-on potential, compares the difference operation result with the set value of the judgment condition, and sets the value range of the set value of the judgment condition X, Y, Z to be 0-1000 mV.
If | Von1-Von2| > X, it indicates that the sleeve 1 and the pipe 2 are in an insulating state; if the absolute value of Von1-Von2 is less than or equal to X, the bushing 1 and the pipeline 2 are suspected to be in a conducting state, the cathode protection current of the suspected pipeline 2 flows into the bushing 1, and the monitor 3 gives an alarm through a set communication module to prompt a worker to carry out on-site detection in the future.
If | Voff1-Voff2| Y, the bushing 1 and the pipeline 2 are in an insulation state; if | Voff1-Voff2| is less than or equal to Y, it indicates that the sleeve 1 and the pipeline 2 are suspected to be in a conducting state, the cathodic protection current of the suspected pipeline 2 flows into the sleeve 1, and the monitor 3 gives an alarm through a set communication module to prompt a worker to carry out field detection in the future.
If Von2-Voff2 < Z, it indicates that the bushing 1 and the pipe 2 are in an insulated state; if | Von2-Voff2| ≧ Z, it indicates that the sleeve 1 and the pipeline 2 are suspected to be in a conducting state, the cathodic protection current of the suspected pipeline 2 flows into the sleeve 1, and the monitor 3 sends an alarm through a set communication module to prompt a worker to carry out on-site detection in the future.
In order to realize the automatic control of the on-off of the control switch, the first control switch K1 and the second control switch K2 are both installed in the monitor 3, and the monitor 3 controls the first control switch K1 and the second control switch K2 to be closed or turned off.
In order to simplify the electrical connection structure, the first control switch K1 divides the first lead 5 into a tube connection section 51 and a first test strip connection section 52, and the monitor 3 is electrically connected to the tube potentiometric test strip 43 through the first test strip connection section 52.
The second control switch K2 divides the second lead 6 into a sleeve connecting section 61 and a second test strip connecting section 62, and the monitor 3 is electrically connected with the sleeve potential test strip 44 through the second test strip connecting section 62.
The pipe potentiometric test piece 43 and the sleeve potentiometric test piece 44 are both provided with exposed parts which are in contact with soil.
In order to ensure the same polarization effect of the test piece, the exposed part of the pipeline potential test piece 43 has the same surface area as the exposed part of the sleeve potential test piece 44, so that the consistency of potential measurement is improved, the accuracy of potential measurement is ensured, and the accuracy of insulation state detection is further ensured.
Claims (4)
1. A sleeve insulation monitoring device is used for monitoring the insulation state between a sleeve (1) and a pipeline (2), and is characterized by comprising a monitor (3) and a measuring unit (4);
the measuring unit (4) comprises a reference tube (41) buried in soil, a reference electrode (42), a pipeline potential test piece (43) and a sleeve potential test piece (44);
the reference tube (41) is a tube made of an insulating material, the reference electrode (42) is positioned in the reference tube (41), and the top ends of the pipeline potential test piece (43) and the sleeve potential test piece (44) are flush with the end face of the bottom end of the reference tube (41);
the pipeline (2) is electrically connected with the pipeline potential test piece (43) through a first lead (5), and a first control switch (K1) is arranged on the first lead (5) to control the on-off of the electrical connection between the pipeline (2) and the pipeline potential test piece (43);
the sleeve (1) is electrically connected with the sleeve potential test piece (44) through a second lead (6), and a second control switch (K2) is arranged on the second lead (6) to control the on-off of the electrical connection between the sleeve (1) and the sleeve potential test piece (44);
the reference electrode (42), the pipeline potential test piece (43) and the sleeve potential test piece (44) are electrically connected with the monitor (3) so that the monitor (3) can carry out potential detection.
2. A casing insulation monitoring device according to claim 1, characterized in that the first control switch (K1) and the second control switch (K2) are both installed in the monitor (3) so that the monitor (3) controls the on-off thereof.
3. The casing insulation monitoring device according to claim 1, wherein the first control switch (K1) divides the first conducting wire (5) into a pipe connecting section (51) and a first test strip connecting section (52), and the monitor (3) is electrically connected with the pipe potential test strip (43) through the first test strip connecting section (52);
the second control switch (K2) divides the second lead (6) into a sleeve connecting section (61) and a second test piece connecting section (62), and the monitor (3) is electrically connected with the sleeve potential test piece (44) through the second test piece connecting section (62).
4. The casing insulation monitoring device according to claim 1, wherein the pipe potentiometric test piece (43) and the casing potentiometric test piece (44) are provided with exposed portions which are in contact with soil, and the surface areas of the exposed portions are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920932676.2U CN210127273U (en) | 2019-06-20 | 2019-06-20 | Sleeve insulation monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920932676.2U CN210127273U (en) | 2019-06-20 | 2019-06-20 | Sleeve insulation monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210127273U true CN210127273U (en) | 2020-03-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920932676.2U Active CN210127273U (en) | 2019-06-20 | 2019-06-20 | Sleeve insulation monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210127273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866543A (en) * | 2021-09-29 | 2021-12-31 | 北京安科腐蚀技术有限公司 | Real-time monitoring, detecting and evaluating method and device for insulating device |
| CN114878992A (en) * | 2022-06-22 | 2022-08-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Pipeline insulation monitoring method and device |
-
2019
- 2019-06-20 CN CN201920932676.2U patent/CN210127273U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866543A (en) * | 2021-09-29 | 2021-12-31 | 北京安科腐蚀技术有限公司 | Real-time monitoring, detecting and evaluating method and device for insulating device |
| CN114878992A (en) * | 2022-06-22 | 2022-08-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Pipeline insulation monitoring method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200826 Address after: 100027 Chaoyang District North Street, No. 22, Beijing Co-patentee after: Sinopec Sales Co., Ltd. Huazhong Co. Patentee after: China Petroleum & Chemical Corp. Co-patentee after: QINGDAO YAHE SCIENCE & TECH DEVELOPMENT Co.,Ltd. Address before: 430024 No. 39, Changqing Road, Jianghan District, Hubei, Wuhan Co-patentee before: QINGDAO YAHE SCIENCE & TECH DEVELOPMENT Co.,Ltd. Patentee before: Sinopec Sales Co., Ltd. Huazhong Co. |
|
| TR01 | Transfer of patent right |