CN214244621U - Cathode protection potential measuring device capable of reducing stray current interference - Google Patents
Cathode protection potential measuring device capable of reducing stray current interference Download PDFInfo
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- CN214244621U CN214244621U CN202022807627.1U CN202022807627U CN214244621U CN 214244621 U CN214244621 U CN 214244621U CN 202022807627 U CN202022807627 U CN 202022807627U CN 214244621 U CN214244621 U CN 214244621U
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- potential
- pipeline
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- support frame
- collector
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- 238000004210 cathodic protection Methods 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims abstract description 24
- 239000002689 soil Substances 0.000 claims abstract description 23
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000010030 laminating Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides a cathode protection potential measuring device for reducing stray current interference, which comprises a constant potential rectifier, wherein the constant potential rectifier is connected with a pipeline to be measured through a lead and is used for providing measuring voltage for the pipeline to be measured; the device comprises at least two potential collectors, a signal acquisition unit and a signal processing unit, wherein the at least two potential collectors are used for respectively measuring the potentials of different axial positions of a pipeline to be measured; the support frame is used for supporting and fixing the at least two potential collectors, and the support frame is attached to the outer diameter of the pipeline to be measured in a bending state. Reduce stray current interference's cathodic protection potential measuring device. The influence of stray current generated by moist soil on the potential measurement accuracy can be reduced as much as possible. The support frame sets up in laminating under crooked state the design of the external diameter of awaiting measuring pipeline is convenient for place the current potential collector on the pipeline that awaits measuring, and is convenient for current potential collector and the pipeline that awaits measuring fully contact, further promotes cathodic protection potential measurement's precision.
Description
Technical Field
The utility model belongs to the technical field of the pipeline corrosion detects, especially, relate to a reduce stray current interference's cathodic protection potential measuring device.
Background
The cathodic protection of the pipeline is an important measure for prolonging the service life of the buried metal pipeline and ensuring the safe operation of the pipeline. The existing metal pipeline mostly adopts a forced cathodic protection method, and a potentiostat is used for applying a forced cathodic current to the metal pipeline, so that the potential between the metal pipeline and an anode ground bed is between-0.85V and-1.25V, the metal pipeline is prevented from being corroded by soil, if the potential is higher than-0.85V, the cathodic protection effect is weakened, the protection effect cannot be achieved, and is less than-1.25V, hydrogen is easily displaced from the soil by the metal pipeline, and a pipeline protection layer falls off.
For the protection potential detection of the existing natural gas pipeline, a cathodic protection monitoring pile is mostly adopted, the cathodic protection monitoring pile is also connected with the pipeline, a reference electrode and the like through a cable, and faults such as corrosion, poor contact and the like are easy to occur in the long-term use process; the voltage detection deviation of the pipeline is too large, and whether the pipeline voltage is within the cathode protection voltage range cannot be judged. Therefore, the cathodic protection potential is usually measured by a potential measurement method in the prior art. Specifically, the test wire is connected to a high-resistance voltmeter to directly read data. However, this method has the following problems: the stray currents that occur due to the IR drop of the soil affect the measurement accuracy. The IR drop is a resistance drop caused by current flowing in a medium, and is a harmful component in potential measurement and should be removed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a reduce cathodic protection potential measuring device that stray current disturbed to solve among the prior art cathodic protection potential measuring device and receive the technical problem that the precision that stray current disturbed and lead to descends.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a cathodic protection potential measuring device that reduces stray current interference, comprising:
the constant potential rectifier is connected with the pipeline to be measured through a lead and used for providing measurement voltage for the pipeline to be measured;
the device comprises at least two potential collectors, a signal acquisition unit and a signal processing unit, wherein the at least two potential collectors are used for respectively measuring the potentials of different axial positions of a pipeline to be measured;
the support frame is used for supporting and fixing the at least two potential collectors, and the support frame is attached to the outer diameter of the pipeline to be measured in a bending state.
Further, the cathode protection potential measuring device for reducing the interference of the stray current further comprises: and the soil potential collector is used for collecting the potential of the moist soil below the pipeline to be measured.
Further, the support frame includes: and the rigid positioning block is in sliding connection with the soil potential collector.
Further, the support frame includes: at least two sections of support bars are hinged, and the support bars are provided with through holes for accommodating the potential collector.
Furthermore, the support frame is a flexible support frame, and a through hole for accommodating the potential collector is formed in the flexible support frame.
Furthermore, the inner diameter of the through hole is matched with the outer diameter of the potential collector, and an anti-slip ring is arranged on the inner side of the through hole, so that the potential collector can slide in the through hole in a stagnation manner, and the vertical position can be adjusted.
Furthermore, the supporting frame is provided with a slide way, and correspondingly, the potential collector is provided with a slide block matched with the slide way, so that the potential collector is circumferentially arranged on the pipeline to be measured according to the measurement requirement.
Compared with the prior art, the cathode protection potential measuring device for reducing the interference of stray current has the following advantages:
reduce cathodic protection current potential measuring device that stray current disturbed place two at least current collectors on the support frame through setting up, can measure the electric potential of pipeline axial different positions respectively, because different positions receive stray current's interference difference, carry out average operation through the electric potential of measuring pipeline axial different positions, the influence of stray current that can minimize moist soil produced to current potential measurement accuracy. Simultaneously, the support frame is arranged on the bent state and is attached to the outer diameter of the pipeline to be measured, so that the potential collector can be conveniently placed on the pipeline to be measured, the potential collector can be conveniently and fully contacted with the pipeline to be measured, and the measurement precision of the cathodic protection potential is further improved
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention;
fig. 2 is an exploded view of a cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention;
fig. 4 is an exploded view of another cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention.
Description of reference numerals:
1-potentiostat; 2-a support frame; 3-a potential collector; 4-a soil potential collector; 5-a rigid positioning block; 6-supporting strips; 7-a through hole; 8-a flexible support frame; 9-a slideway; 10-a slide block.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a schematic structural diagram of a cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention; fig. 2 is an exploded view of a cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention; referring to fig. 1 and 2, the apparatus for measuring a cathodic protection potential with reduced stray current interference includes: the constant potential measuring meter is connected with the pipeline to be measured through a lead and is used for providing measuring voltage for the pipeline to be measured; the device comprises at least two potential collectors, a signal acquisition unit and a signal processing unit, wherein the at least two potential collectors are used for respectively measuring the potentials of different axial positions of a pipeline to be measured; the support frame is used for supporting and fixing the at least two potential collectors, and the support frame is attached to the outer diameter of the pipeline to be measured in a bending state.
In the embodiment, the potentiostat is used for providing a lower voltage and is electrically connected to the pipe to be measured for providing a voltage for measurement. Since small voltage fluctuations can also seriously affect the accuracy of the measurement, in this embodiment a potentiostat is used to provide a stable voltage.
The potential collector can be a probe, is electrically connected with the potentiostat, and forms a circuit loop through the potentiostat, the pipeline and the potential collector. Correspondingly, a current meter and a resistor can be arranged on the potentiostat. And directly measuring to obtain the current corresponding to the potential collector.
In this embodiment, the cathode protection potential measuring device for reducing stray current interference includes at least two potential collectors, and each potential collector is located at different axial positions of the pipeline to be measured. Illustratively, a plurality of potential collectors may be provided according to the measured pipe diameter. The current of different axial positions of the pipeline can be measured by arranging a plurality of potential collectors. Because the pipeline is buried in the moist soil, the humidity distribution of the soil is different. Therefore, currents at different positions can be obtained through the plurality of potential collectors, and the interference of stray currents is reduced by means of calculating the average value, so that the accuracy of potential measurement is improved.
Because a plurality of potential collectors are arranged, compared with the traditional single-point measurement mode, the installation is more complex, and the measurement can be completed only by the cooperation of a plurality of persons. Therefore, in this embodiment, the apparatus for measuring cathodic protection potential for reducing interference of stray current further comprises: the support frame is used for supporting and fixing the at least two potential collectors, and the support frame is attached to the outer diameter of the pipeline to be measured in a bending state.
Optionally, the support frame can adopt a hinge structure of a plurality of sections of support bars, wherein each support bar is provided with a through hole for accommodating the potential collector. Through setting up the support frame, the staff only need with the support frame laminating in the external diameter of the pipeline of awaiting measuring can realize measuring the electric potential of taking the different positions of measurement pipeline axial simultaneously.
Fig. 3 is a schematic structural diagram of another cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention; fig. 4 is an exploded view of another cathodic protection potential measuring device for reducing stray current interference according to an embodiment of the present invention. Referring to fig. 3 and 4, in another embodiment of this embodiment, the supporting frame may also be made of a flexible material, such as a rubber belt. Correspondingly, the flexible support frame is also provided with a through hole for accommodating the potential collector.
In the actual measurement process, due to the difference of pipe diameters, the corresponding depth of each potential collector in the through hole is different, and the depth of the inlet hole needs to be manually adjusted by a worker before measurement, so that a probe of the potential collector can be in full contact with the outer side pipe wall of the pipeline to be measured. Therefore, in this embodiment, the inner diameter of the through hole matches with the outer diameter of the potential collector, and the inner side of the through hole is provided with an anti-slip ring, so that the potential collector can slide in the through hole in a stagnation manner, and the adjustment of the upper position and the lower position is realized. And the purpose of limiting the upper and lower positions of the potential collector can be achieved through the anti-slip ring.
Meanwhile, due to different pipe diameters, the distribution position of each potential collector on the outer diameter of the pipeline to be measured needs to be flexibly adjusted during actual measurement or repeated measurement. Therefore, in this embodiment, the supporting frame is provided with a slide way, and correspondingly, the potential collector is provided with a slide block matched with the slide way, so that the potential collector is circumferentially arranged on the pipeline to be measured according to the measurement requirement. The potential collector can be flexibly adjusted in the circumferential arrangement quantity and position of the pipeline to be measured through the arrangement, and potential measurement and retesting are facilitated.
In a preferred embodiment of this embodiment, the apparatus for measuring cathodic protection potential to reduce interference of stray current further includes: and the soil potential collector is used for collecting the potential of the moist soil below the pipeline to be measured. Since soil moisture varies with depth, the stray current generated by the soil below the pipe is large. Therefore, in this embodiment, a separate soil potential collector is used for measuring the potential corresponding to the stray current. The potential corresponding to the stray current can be subtracted, and then more accurate detection potential can be obtained.
Correspondingly, the support frame is also provided with a rigid positioning block, and the rigid positioning block is connected with the soil potential collector in a sliding manner. The soil potential collector is fixed conveniently by utilizing the rigid positioning block, and the position of the soil potential collector can be flexibly adjusted conveniently by adopting a sliding connection fixing mode.
Reduce cathodic protection current potential measuring device that stray current disturbed place two at least current collectors on the support frame through setting up, can measure the electric potential of pipeline axial different positions respectively, because different positions receive stray current's interference difference, carry out average operation through the electric potential of measuring pipeline axial different positions, the influence of stray current that can minimize moist soil produced to current potential measurement accuracy. Simultaneously, the support frame is arranged on the bent state and is attached to the outer diameter of the pipeline to be measured, so that the potential collector can be conveniently placed on the pipeline to be measured, the potential collector can be conveniently and fully contacted with the pipeline to be measured, and the measurement precision of the cathodic protection potential is further improved
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A cathodic protection potential measuring device for reducing stray current interference is characterized in that: the cathodic protection potential measuring device for reducing the interference of stray current comprises:
the constant potential rectifier is connected with the pipeline to be measured through a lead and used for providing measurement voltage for the pipeline to be measured;
the device comprises at least two potential collectors, a signal acquisition unit and a signal processing unit, wherein the at least two potential collectors are used for respectively measuring the potentials of different axial positions of a pipeline to be measured;
the support frame is used for supporting and fixing the at least two potential collectors, and the support frame is attached to the outer diameter of the pipeline to be measured in a bending state.
2. The stray current interference reducing cathodic protection potential measuring device of claim 1, further comprising: and the soil potential collector is used for collecting the potential of the moist soil below the pipeline to be measured.
3. The apparatus of claim 2, wherein the support frame comprises: and the rigid positioning block is in sliding connection with the soil potential collector.
4. The apparatus of claim 1, wherein the support frame comprises: at least two sections of support bars are hinged, and the support bars are provided with through holes for accommodating the potential collector.
5. The cathodic protection potential measuring device for reducing stray current interference of claim 1, wherein the support frame is a flexible support frame, and a through hole for accommodating a potential collector is arranged on the flexible support frame.
6. The cathodic protection potential measuring device for reducing the interference of stray current according to claim 4 or 5, wherein the inner diameter of the through hole is matched with the outer diameter of the potential collector, and an anti-slip ring is arranged on the inner side of the through hole, so that the potential collector can slip in the through hole in a stagnation manner, and the adjustment of the upper position and the lower position is realized.
7. The cathode protection potential measuring device for reducing stray current interference of claim 1, wherein a slide way is arranged on the supporting frame, and correspondingly, a slide block matched with the slide way is arranged on the potential collector, so that the potential collector is circumferentially arranged on a pipeline to be measured according to measurement requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022807627.1U CN214244621U (en) | 2020-11-27 | 2020-11-27 | Cathode protection potential measuring device capable of reducing stray current interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022807627.1U CN214244621U (en) | 2020-11-27 | 2020-11-27 | Cathode protection potential measuring device capable of reducing stray current interference |
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| CN214244621U true CN214244621U (en) | 2021-09-21 |
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| CN202022807627.1U Expired - Fee Related CN214244621U (en) | 2020-11-27 | 2020-11-27 | Cathode protection potential measuring device capable of reducing stray current interference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216776A (en) * | 2022-06-28 | 2022-10-21 | 浙江浙能天然气运行有限公司 | Natural gas pipe network potentiostat output optimization method based on time sequence prediction |
-
2020
- 2020-11-27 CN CN202022807627.1U patent/CN214244621U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115216776A (en) * | 2022-06-28 | 2022-10-21 | 浙江浙能天然气运行有限公司 | Natural gas pipe network potentiostat output optimization method based on time sequence prediction |
| CN115216776B (en) * | 2022-06-28 | 2024-03-01 | 国家管网集团浙江省天然气管网有限公司 | Natural gas pipe network potentiostat output optimization method based on time sequence prediction |
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Granted publication date: 20210921 |
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| CF01 | Termination of patent right due to non-payment of annual fee |