CN215799909U - A monitoring device for cathodic protection effect of steel structure sacrificial anode - Google Patents
A monitoring device for cathodic protection effect of steel structure sacrificial anode Download PDFInfo
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- CN215799909U CN215799909U CN202121725445.8U CN202121725445U CN215799909U CN 215799909 U CN215799909 U CN 215799909U CN 202121725445 U CN202121725445 U CN 202121725445U CN 215799909 U CN215799909 U CN 215799909U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000004210 cathodic protection Methods 0.000 title claims abstract description 29
- 230000000694 effects Effects 0.000 title claims abstract description 28
- 238000012806 monitoring device Methods 0.000 title claims description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 43
- 239000000523 sample Substances 0.000 claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 4
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 3
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 3
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- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
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- 238000005260 corrosion Methods 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 5
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- 238000005259 measurement Methods 0.000 description 4
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- 230000008859 change Effects 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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Abstract
The invention provides a device for monitoring the cathodic protection effect of a sacrificial anode of a steel structure, which comprises a fixing box and a monitoring instrument, wherein connecting pieces are arranged on four side surfaces of the fixing box, one end of each connecting piece, which is far away from the fixing box, is provided with a conductive probe, the conductive probe is connected with a first lead, the surface of the fixing box is provided with a reference electrode, the reference electrode is connected with a second lead, and the first lead and the second lead can be connected to the monitoring instrument. The method can realize the comprehensive monitoring of the residual quantity of the sacrificial anode and the protected potential of the steel structure, and can evaluate the cathodic protection effect of the sacrificial anode more comprehensively and reasonably.
Description
Technical Field
The invention belongs to the technical field of corrosion and protection of metal materials, and particularly relates to a device for monitoring the cathodic protection effect of a sacrificial anode of a steel structure.
Background
The steel structure engineering benefits from the advantages of short construction period, low energy consumption, convenient construction and the like, plays an important role in the construction of the traffic infrastructure in China, and the steel structure materials are used in large scale in the projects such as offshore drilling platforms, offshore wind power, high-pile wharfs and the like. However, the corrosion condition of the steel structure is severe due to the influence of the severe marine service environment. The method for carrying out cathodic protection on a steel structure by adopting a sacrificial anode is a common technique at present, in order to evaluate the effectiveness of the sacrificial anode, the potential of the steel structure and the residual condition of the sacrificial anode need to be detected on site regularly, however, the on-site detection is greatly influenced by environmental conditions, and especially the on-site detection is inconvenient under the extreme weather of offshore engineering. In order to control the service condition of the sacrificial anode in real time, research and development of a large number of automatic monitoring devices are carried out in scientific research, but the conventional monitoring devices are limited to single test of current, and the service condition of the sacrificial anode cannot be comprehensively evaluated.
Disclosure of Invention
The invention aims to provide a device for monitoring the cathodic protection effect of a sacrificial anode of a steel structure, which can realize the comprehensive monitoring of the residual quantity of the sacrificial anode and the protected potential of the steel structure and can evaluate the cathodic protection effect of the sacrificial anode more comprehensively and reasonably.
The invention is realized by the following technical scheme:
the utility model provides a steel construction sacrificial anode cathodic protection effect monitoring devices, includes fixed box and monitoring instrument, and the connecting piece is all installed to four sides of fixed box, and the one end that fixed box was kept away from to the connecting piece is equipped with conductive probe, and conductive probe is connected with first wire, and fixed box surface is equipped with reference electrode, and reference electrode is connected with the second wire, and first wire and second wire can be connected to the monitoring instrument.
Furthermore, the connecting piece is the turnbuckle, and it includes body sleeve and two threaded rods, and threaded connection is at the telescopic both ends of body respectively for two threaded rods, and the telescopic one end of body is kept away from to a threaded rod is connected with electrically conductive probe, and the telescopic one end of body is kept away from to another threaded rod runs through the setting in fixed box.
Furthermore, a wire outlet is formed in the fixed box, a protection pipe is arranged at the wire outlet, a hollow structure is arranged in the threaded rod, a first lead of the conductive probe sequentially penetrates through the two threaded rods of the connecting piece connected with the conductive probe and then is collected into the fixed box, penetrates through the wire outlet and the protection pipe and extends to the outside of the fixed box, and a second lead penetrates through the fixed box and then is collected into the fixed box, penetrates through the wire outlet and the protection pipe and extends to the outside of the fixed box.
Furthermore, the conductive probe comprises a half-moon-shaped fixing plate, the outer side of the fixing plate is connected with the connecting piece, the inner side of the fixing plate is provided with a contact copper sheet, and the first lead is connected with the contact copper sheet.
Furthermore, the fixed box, the connecting piece and the fixed plate are all made of polytetrafluoroethylene materials.
Furthermore, an Ag/AgCl electrode is adopted as a reference electrode, and the reference electrode is a solid electrode.
Compared with the prior art, the invention has the beneficial effects that: the method has the advantages of simple preparation process, convenience for field construction, good mechanical strength and environmental corrosion resistance, effective guarantee of long-term service life, capability of evaluating consumption by measuring change of resistance value of the sacrificial anode, monitoring at any time, and capability of more comprehensively evaluating the protection effect of the sacrificial anode cathode by combining measurement of potential of a steel structure and potential of the sacrificial anode.
Drawings
FIG. 1 is a schematic structural diagram of a device for monitoring the cathodic protection effect of a sacrificial anode in a steel structure according to the present invention;
FIG. 2 is an installation diagram of the device for monitoring the cathodic protection effect of the steel structure sacrificial anode of the present invention;
FIG. 3 is an enlarged schematic view of a conductive probe in the device for monitoring the cathodic protection effect of the sacrificial anode in the steel structure.
In the figure, 1-fixed box, 2-connecting piece, 21-body sleeve, 22-threaded rod, 3-conductive probe, 31-fixed plate, 32-contact copper sheet, 4-first lead, 5-reference electrode, 6-second lead, 7-monitoring instrument, 8-sacrificial anode and 9-steel structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a device for monitoring the cathodic protection effect of a sacrificial anode in a steel structure according to the present invention. The utility model provides a steel construction sacrificial anode cathodic protection effect monitoring devices, includes fixed box 1 and monitoring instrument 7, and connecting piece 2 is all installed to four sides of fixed box 1, and the one end that fixed box 1 was kept away from to connecting piece 2 is equipped with conductive probe 3, and conductive probe 3 is connected with first wire 4, and fixed box 1 surface is equipped with reference electrode 5, and reference electrode 5 is connected with second wire 6, and first wire 4 and second wire 6 can be connected to monitoring instrument 7.
Referring to fig. 2 to 3, fig. 2 is an installation schematic diagram of the device for monitoring cathodic protection of steel structure sacrificial anode of the present invention, and fig. 3 is an enlarged schematic diagram of a conductive probe in the device for monitoring cathodic protection of steel structure sacrificial anode of the present invention. The upper end and the lower end of the sacrificial anode 8 are fixed ends, the two fixed ends are respectively fixed on the steel structure 9, the device for monitoring the cathodic protection effect of the sacrificial anode 8 of the steel structure 9 is arranged between the sacrificial anode 8 and the steel structure 9, the connecting pieces 2 are respectively arranged on the upper side surface, the lower side surface, the left side surface and the right side surface of the fixed box 1, the conductive probes 3 on the four connecting pieces 2 are respectively in close contact with the two fixed ends of the sacrificial anode 8, the middle part of the sacrificial anode 8 and the steel structure 9, and the device for monitoring the cathodic protection effect of the sacrificial anode 8 of the steel structure 9 is fixed between the sacrificial anode 8 and the steel structure 9, as shown in figure 2. In one embodiment, the connecting member 2 is a turnbuckle, which includes a body sleeve 21 and two threaded rods 22, the two threaded rods 22 are respectively threaded on two ends of the body sleeve 21, one end of one threaded rod 22 away from the body sleeve 21 is connected to the conductive probe 3, and one end of the other threaded rod 22 away from the body sleeve 21 is disposed in the fixing box 1 in a penetrating manner. The connecting pieces 2 adopt turn-buckle screws, and the extending length of the threaded rods 22 from the body sleeve 21 is used for adjusting the overall length of each connecting piece 2, so that the conductive probes 3 on the four connecting rods are respectively in close contact with two fixed ends of the sacrificial anode 8, the middle part of the sacrificial anode 8 and the steel structure 9. In one embodiment, the conductive probe 3 includes a half-moon-shaped fixing plate 31, the fixing plate 31 is connected to the connector 2 at the outer side, a contact copper sheet 32 is disposed at the inner side, and the first lead 4 is connected to the corresponding contact copper sheet 32. The fixing plate 31 is half-moon-shaped, the contact copper sheet 32 is fixed on the inner side of the fixing plate 31, the contact copper sheet 32 is also half-moon-shaped, the fixing plate 31 and the contact copper sheet 32 are enabled to be more attached to the two fixed ends of the sacrificial anode 8, the middle of the sacrificial anode 8 or the steel structure 9, and the device for monitoring the cathodic protection effect of the sacrificial anode 8 of the steel structure 9 can be more stably fixed between the sacrificial anode 8 and the steel structure 9. In one embodiment, the fixing case 1, the connecting member 2 and the fixing plate 31 are made of teflon. The arrangement ensures that the overall monitoring device for the cathodic protection effect of the sacrificial anode 8 of the steel structure 9 has good mechanical strength and environmental corrosion resistance, and effectively ensures the long-term service life of the monitoring device.
The reference electrode 5 is fixed on the surface of the fixing box 1, in one embodiment, the reference electrode 5 is preferably an Ag/AgCl electrode, and the reference electrode 5 is preferably a solid electrode. When measurement is needed, the corresponding first lead 4 or the corresponding second lead 6 is selected to be connected to a monitoring instrument 7 according to measurement data needed, specifically, the monitoring instrument 7 measures the resistance value of the sacrificial anode 8 by connecting the first lead 4 of the conductive probe 3 contacted with two fixed ends of the sacrificial anode 8, the monitoring instrument 7 measures the potential of the steel structure 9 by connecting the second lead 6 with the first lead 4 of the conductive probe 3 contacted with the steel structure 9, or the monitoring instrument 7 measures the potential of the sacrificial anode 8 by connecting the second lead 6 with the first lead 4 of the conductive probe 3 contacted with the middle part of the sacrificial anode 8. The monitoring instrument 7 may employ a multimeter or an electrochemical workstation. In an embodiment, the fixed box 1 is provided with an outlet, a protection tube (not shown) is arranged at the outlet, the interior of the threaded rod 22 is a hollow structure, the first lead 4 of the conductive probe 3 sequentially penetrates through the two threaded rods 22 of the connecting piece 2 connected with the conductive probe and then is collected in the fixed box 1, and penetrates through the outlet and the protection tube to extend to the exterior of the fixed box 1, and the second lead 6 penetrates through the fixed box 1 and then is collected in the fixed box 1, and penetrates through the outlet and the protection tube to extend to the exterior of the fixed box 1. Collect the first wire 4 of four wire probes and the second wire 6 of reference electrode 5 in fixed box 1 to collect together through the protection tube, fixed box 1 and protection tube can play the effect of collecting storage and protection to first wire 4 and second wire 6, avoid the wire in disorder, portable.
The monitoring process of the device for monitoring the cathodic protection effect of the sacrificial anode 9 and the cathodic protection effect of the steel structure 8 is briefly described as follows:
the first lead 4 of the conductive probe 3 which is contacted with the two fixed ends of the sacrificial anode 8 is connected with a monitoring instrument 7, the resistance value of the sacrificial anode 8 is measured by the monitoring instrument 7, and then the loss rate of the sectional area of the sacrificial anode 8 is obtained by the monitoring resistance value of the monitoring instrument 7:
in the formula, ρ1Is the resistivity of the material of the sacrificial anode 8, in units, L is the length of the sacrificial anode 8, R0For an initial resistance value, R, of the sacrificial anode 8iFor monitoring instrumentsThe resistance value of the sacrificial anode 8 monitored by the device 7; and then the consumption quality of the sacrificial anode 8 is calculated according to the loss rate of the sectional area of the sacrificial anode 8: Δ m ═ ρ2X L.times.DELTA.S, wherein ρ2At the sacrifice of anode 8 density. Then connecting the second lead 6 and the first lead 4 of the conductive probe 3 which is in contact with the steel structure 9 to a monitoring instrument 7, measuring the potential of the steel structure 9 through the monitoring instrument 7, and evaluating the effectiveness of the cathode protection of the sacrificial anode 8 on the steel structure 9 according to the potential of the steel structure 9, specifically, when the potential of the steel structure 9 is more than 800mv, the effectiveness of the cathode protection of the sacrificial anode 8 on the steel structure 9 is indicated; and then the second lead 6 and the first lead 4 of the conductive probe 3 contacted with the middle part of the sacrificial anode 8 are connected to a monitoring instrument 7, the potential of the sacrificial anode 8 is measured by the monitoring instrument 7, whether the sacrificial anode 8 has the capability of protecting the steel structure 9 is evaluated according to the potential of the sacrificial anode 8, and specifically, when the potential of the sacrificial anode 8 is less than 1200mv, the sacrificial anode 8 has the capability of protecting the steel structure 9.
Compared with the prior art, the invention has the beneficial effects that: the preparation process is simple, the site construction is convenient, the mechanical strength and the environmental corrosion resistance are good, the long service life is effectively ensured, the consumption is evaluated by measuring the resistance value change of the sacrificial anode 8, the monitoring can be carried out at any time, and the cathodic protection effect of the sacrificial anode 8 can be more comprehensively evaluated by combining the measurement of the potential of the steel structure 9 and the potential of the sacrificial anode 8.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention will still fall within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.
Claims (6)
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| CN202121725445.8U CN215799909U (en) | 2021-07-27 | 2021-07-27 | A monitoring device for cathodic protection effect of steel structure sacrificial anode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113502478A (en) * | 2021-07-27 | 2021-10-15 | 中交四航工程研究院有限公司 | Steel construction sacrificial anode cathodic protection effect monitoring devices |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502478A (en) * | 2021-07-27 | 2021-10-15 | 中交四航工程研究院有限公司 | Steel construction sacrificial anode cathodic protection effect monitoring devices |
| CN113502478B (en) * | 2021-07-27 | 2024-12-10 | 中交四航工程研究院有限公司 | A monitoring device for the effect of sacrificial anode cathodic protection of steel structures |
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