CN1049911A - Detector for cathode protection condition of ocean platform node - Google Patents
Detector for cathode protection condition of ocean platform node Download PDFInfo
- Publication number
- CN1049911A CN1049911A CN 89105149 CN89105149A CN1049911A CN 1049911 A CN1049911 A CN 1049911A CN 89105149 CN89105149 CN 89105149 CN 89105149 A CN89105149 A CN 89105149A CN 1049911 A CN1049911 A CN 1049911A
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- node
- contact
- detection instrument
- detector
- reference electrode
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- 238000001514 detection method Methods 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 238000004210 cathodic protection Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000013473 artificial intelligence Methods 0.000 abstract 1
- 238000012625 in-situ measurement Methods 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 239000013535 sea water Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Prevention Of Electric Corrosion (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The detector is a portable artificial intelligence technology for detecting the cathode protection state of the node of the ocean platform, and consists of a signal sensor consisting of a contact and a reference electrode, a microcomputer system and a shell, wherein the middle part of the signal sensor consists of a circular hollow tube seat, a rear cavity is internally provided with the microcomputer system, the microcomputer system consists of a signal amplifier, an A/D converter, a microcomputer output interface, a printer and a power supply, and the detector is in a gun-shaped structure and directly keeps good electric contact with the surface of the underwater node of the platform so as to measure the cathode protection state of the node. Its advantages are in-situ measurement and in-situ judgement of the cathodic protection state of node under normal or complex condition.
Description
The invention belongs to key position (node) corrosion of ocean platform and the safety detection technology of protection situation.
Regularly carrying out the offshore platform structure corrosion detects with the scene of guard mode; be to find accident potential as early as possible; the important technique measure that protection marine oil facility long-term safety is produced; the ocean platform node is a bearing strength test; the position that the random fatigue stress that welding residual stress and environmental factor cause is concentrated; also be that marine growth adheres to the position of causing local pollution with contamination build-up; thereby make the corrosion electrochemistry condition at these positions become more than pure seawater harshness; therefore the platform node just becomes the key of platform cathodic protection and safety guarantee; comprised electrochemical method that physical method such as ultrasonic and magnetic powder inspection and Underwater Electric Potential measure main detection technique in the at present both at home and abroad used Dynamic Non-Destruction Measurement as ocean platform; what the former measured is the consequence that corrosion is caused; what the latter measured then is key parameter one current potential of decision corrosion; " the Underwater Electric Potential difference meter " that be widely used at present mostly adopts liquid crystal display, and this kind apparatus measures exists following shortcoming:
1, only provide single potential value, can't make rapidly in the guard mode during at different potentials under the complex environment condition (the local pollution environment that polluted seawater and node closely are close to) ocean platform key position (node) and judging.
2, by liquid crystal display, seawater shows muddy slightly just can't be used.
3, can only be at the measured value of demonstration at that time that detects, the no datat store function, and be easy to cause fault error.
4, adopt and to have the cable detection technique around node, to shuttle back and forth when measuring, cable be easy in platform leg and lacing wire around.
Because the local environment of the pollution of seawater/ooze and platform node " stagnant area " is polluted the brittle fracture sensitivity in the time of will increasing the node cathodic protection greatly, this danger is carried out in-site measurement and made rapid judgement in addition but also lack corresponding techniques now.
For solving above deficiency; the invention provides a kind of ocean platform cathode protecting state detection instrument; it utilizes no cable, contact potential acquisition mechanism; possesses the microprocessor system and the mini-printer output of storage memory and logic judging function; having finished underwater survey the frogman is recovered to detection instrument on the ship or after on the platform; with be stored in wherein whole measured values and the judged result of cathode protection condition, print on the spot at the scene, finish on the spot the purpose that detects.
Structure of the present invention is made up of rifle formula detector and peripherals case two parts, and rifle formula detector comprises the electric potential signal system of front-end probe part, the middle base part and the cavity part at rear portion.The electric potential signal system of platform node cathode protection condition detector is by stainless steel contact (sensor), solid reference electrode and nylon insulating segment are formed, when stainless steel contact and platform node surface maintenance good electrical contact, because the surface area of contact is much smaller than the surface area of platform node, so contact and the mixed potential of node in seawater, in fact equate with the current potential of node, then with the current potential of the contacted node of contact with respect to contrast electrode, but input signal receiving system just; Middle base part is made of the circular hollow body; Microcomputer (shown in block diagram) is housed in the cavity thimble at rear portion; play data acquisition; the effect that the storage processing logic is judged; microsystem is by signal amplifier; the A/D transducer; center processor (cpu); working power; operating mode demonstration and output control interface etc. are partly formed; the peripherals case uses on the water; it is by mini-printer; mechanisms such as charge power supply and the selection of printout control/form form; by means of said system; probe electric potential signal (0~500mv; input impedance 〉=1000K Ω) through amplifying and the A/D conversion; the stationary value that records is stored among the cpu, by the cathodic protection potential and the judged result by different protection standards the cathode protection condition of node done of custom-designed software systems with platform, all tabulation printouts on printer.
The present invention and prior art relatively have following advantage:
It is a kind of intelligent detector; it can taken into account under cathodic protection efficient, low stress brittle fracture and the local corrosion situation, and platform key position (node) is measured on the spot and on-the-spotly judged at the cathode protection condition of (comprise polluted seawater and have under the environmental baseline of local pollution at node seawater medium nearby) under normal condition and the complicated environmental condition.When detecting by technical requirement, reliable results, favorable reproducibility.Detection instrument simple in structure, easy to install.
Through international online retrieval, all do not find relevant this patented technology content.
The accompanying drawings embodiment:
Fig. 1 is an ocean platform node cathode protecting state detection instrument structure principle chart.
Fig. 2 is an ocean platform node cathode protecting state detection instrument computer system circuit block scheme.
Know by Fig. 1, front-end probe portion, 1 is contact, 2 is contact base, 3 is dead ring, 4 is kirsite contrast electrode circle, signal transducer system is made of the stainless steel contact 1 that is electrically insulated from each other and kirsite contrast electrode 4 two parts, by means of nylon 1010 joint 3 and 5, and adaptive with it " O " shape O-ring seal, with the leading edge of signal transducer sealing and fixing at detection instrument, 6 is pallet, plays the connection effect, and 7 is base, be the circular hollow body, the distance between sensor and the cavity that can suitably extend, the shortcoming of narrow the current potential of avoiding can't the measured node weld metal zone " splitting shape ", 8 is hanging ring, 9 is thimble, can bear high pressure, 10,11 is the bonnet flange, and 12 is O-ring seal, 13,14 is fastening sieve bolt, 16 is the housing back cavity, and microcomputer 15 and complete dynamo-electric source are equipped with in inside, and 17 is handle, 18 is shell cover, 19,20,21,22,23,24,25 and 26 are all " O " RunddichtringO that seals.Know that as Fig. 2 I is a contact, II is that solid reference electrode, signal are input to the voltage amplifier III, IV is the A/D transducer, V is a microsystem, and VI is an output interface, and VII is a printer, VIII is that operating mode shows, IX is a power supply, and in use, the whole microsystem in annular seal space is under water, the VI VII is arranged in the peripherals case, uses on the water.
This detection instrument has passed through on the chengbei oilfield U/A-B platform node of the Bohai Sea field application test under water, and the result who uses on all nodes of " K-K " shape and " X " shape shows, has reached intrinsic performance and technical requirement fully.
Claims (4)
1, a kind of ocean platform cathode protection condition detection instrument; the invention is characterized in that it is made up of rifle formula detector and peripherals case two parts; the former has comprised the electric potential signal system that contact 1 and solid reference electrode 4 are formed; middle microsystem 15 and the housing 9 that is equipped with for the base 7 of circular hollow body and back cavity 16 inside, the latter by mini-printer, export the peripherals case that selection mechanism of control/form and charge power supply etc. are partly formed.
2, by the described detection instrument of claim 1, it is characterized in that microsystem 15 in the back cavity 16 by the voltage amplifier III, A/D transducer IV, microcomputer V, operating mode show that VIII and power supply IX form.
3, by the described detection instrument of claim 1, it is characterized in that contact 1 is stainless steel, solid reference electrode 4 is made for zinc-containing alloy.
4, by the described detection instrument of claim 1, it is characterized in that contact 1,19-26 between solid reference electrode 4 and the base 7 is all " O " shape O-ring seal, and they match to contrast electrode circle 4 with contact base 2, nylon isolating joint 3,5 respectively, play the effect that seals each other and insulate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 89105149 CN1018952B (en) | 1989-08-28 | 1989-08-28 | Detector for cathode protection condition of ocean platform node |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 89105149 CN1018952B (en) | 1989-08-28 | 1989-08-28 | Detector for cathode protection condition of ocean platform node |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1049911A true CN1049911A (en) | 1991-03-13 |
CN1018952B CN1018952B (en) | 1992-11-04 |
Family
ID=4855917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 89105149 Expired CN1018952B (en) | 1989-08-28 | 1989-08-28 | Detector for cathode protection condition of ocean platform node |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN1018952B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995019561A2 (en) * | 1994-01-14 | 1995-07-20 | Honeywell Inc. | Smart fastener |
CN106501320A (en) * | 2016-11-01 | 2017-03-15 | 保定天威电气设备结构有限公司 | A kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion |
-
1989
- 1989-08-28 CN CN 89105149 patent/CN1018952B/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995019561A2 (en) * | 1994-01-14 | 1995-07-20 | Honeywell Inc. | Smart fastener |
WO1995019561A3 (en) * | 1994-01-14 | 1995-08-17 | Honeywell Inc | Smart fastener |
US5549803A (en) * | 1994-01-14 | 1996-08-27 | Honeywell Inc. | Smart fastener |
CN106501320A (en) * | 2016-11-01 | 2017-03-15 | 保定天威电气设备结构有限公司 | A kind of non-destructive method and dedicated probe for detecting stud weld seam degree of fusion |
CN106501320B (en) * | 2016-11-01 | 2023-07-07 | 保定天威保变电气股份有限公司 | Nondestructive method for detecting welding seam fusion degree of stud and special probe |
Also Published As
Publication number | Publication date |
---|---|
CN1018952B (en) | 1992-11-04 |
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