CN1018952B - Detector for cathode protection condition of offshore platform panel point - Google Patents
Detector for cathode protection condition of offshore platform panel pointInfo
- Publication number
- CN1018952B CN1018952B CN 89105149 CN89105149A CN1018952B CN 1018952 B CN1018952 B CN 1018952B CN 89105149 CN89105149 CN 89105149 CN 89105149 A CN89105149 A CN 89105149A CN 1018952 B CN1018952 B CN 1018952B
- Authority
- CN
- China
- Prior art keywords
- cathode protection
- detector
- protection condition
- panel point
- detection instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Landscapes
- Prevention Of Electric Corrosion (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The present invention relates to a detector which is used for detecting the cathode protection condition of an offshore platform panel point, which belongs to a portable artificial intelligent technique. The detector is composed of a contact head, a signal sensor composed of reference electrodes, a hollow tube socket with a circular center, a microcomputer system arranged in a rear cavity and a shell body, wherein the microcomputer system is composed of a signal amplifier, an A/D converter, a microcomputer output interface, a printer and a power supply. Due to a gun-shaped structure, the detector directly keeps good electric contact with the surface of the underwater panel point of a platform so as to detect the cathode protection condition of the panel point. The detector has the advantage that the cathode protection condition of the panel point can be detected and determined on the spot under a normal condition or under a 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 the key parameter-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 hardware rifle formula detector and peripherals case two parts, and rifle formula detector comprises the electric potential signal system that front end contact and solid reference electrode are formed, 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 a solid reference electrode, signal is input to the voltage amplifier III, and IV is the A/D transducer, and V is a microsystem, VI is an output interface, VII is a printer, and VIII is that operating mode shows that IX is a power supply, in use, whole microsystem in annular seal space is under water, and 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 (3)
1, a kind of ocean platform cathode protection condition detection instrument, form by rifle formula detector and peripherals case two parts, described rifle formula detector comprises the electric potential signal system of front-end probe part, and the middle base part and the spy body portion at rear portion are used under water with upper-part; Described electric potential signal system comprises stainless steel contact (1), and zinc-containing alloy solid reference electrode (4) and nylon 1010 joint (3) and (5) reach suitable with it " 0 " RunddichtringO, signal transducer is fixed on the leading edge of detection instrument; Equipment box comprises mechanisms such as microwriter, charge power supply and the selection of printout control/form outside described, uses on the water.
2, by the described ocean platform cathode protection condition detection instrument of claim 1; it is characterized in that the interior microsystem (15) of cavity (16) is by voltage amplifier (III); A/D transducer (IV), microcomputer (V), operating mode shows (VI) and power supply (VIII) composition.
3, by the described ocean platform cathode protection condition detection instrument of claim 1; it is characterized in that (19)～(26) that contact (1), solid are participated between electrode (4) and the base (7) are all " O " RunddichtringO; they match to contrast electrode (4) with contact base (2), nylon 1010 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 offshore platform panel point |
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 offshore platform panel point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049911A CN1049911A (en) | 1991-03-13 |
| CN1018952B true 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 offshore platform panel point |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1018952B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549803A (en) * | 1994-01-14 | 1996-08-27 | Honeywell Inc. | Smart fastener |
| 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 |
-
1989
- 1989-08-28 CN CN 89105149 patent/CN1018952B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1049911A (en) | 1991-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8310251B2 (en) | System for assessing pipeline condition | |
| US5126654A (en) | Non-invasive, high resolution detection of electrical currents and electrochemical impedances at spaced localities along a pipeline | |
| US7221137B2 (en) | Apparatus with storage for measuring stray currents from subway rails and power lines | |
| CN103712907B (en) | The on-the-spot corrosion electrochemical test system in a kind of deep-sea and method of testing thereof | |
| US5448178A (en) | Transient technique to determine solution resistance for simple and accurate corrosion rate measurements | |
| CN112430817B (en) | Split type device and method for buried metal pipeline corrosion parameter test probe | |
| US4927503A (en) | Method for assessment of corrosion activity in reinforced concrete | |
| CN100585010C (en) | Monitoring device for sea platform sacrificing anode and generating current flow | |
| CN113549918A (en) | Contact type measuring device and method for sacrificial anode cathodic protection state of offshore submarine pipeline | |
| US4644285A (en) | Method and apparatus for direct measurement of current density | |
| CN106940417A (en) | The monitoring device and method of state of insulation between a kind of galvanic couple that insulation isopleth is obtained based on voltage measurement | |
| CN1940578A (en) | Non-contact inspection and its special device at marine-bottom pipeline cathode protecting state | |
| US3831085A (en) | Reactor vessel lining testing method and apparatus | |
| CN1018952B (en) | Detector for cathode protection condition of offshore platform panel point | |
| CN208506209U (en) | A kind of Wind turbines shaft voltage testing tool | |
| CN206696381U (en) | The monitoring device of state of insulation between a kind of galvanic couple that insulation isopleth is obtained based on voltage measurement | |
| CN109269975A (en) | Underwater equipment corrosion potential data detection system | |
| CN108828328A (en) | Portable three-component submarine electric field instrument | |
| CN114369834A (en) | Cathode protection polarization test probe and detection system for buried pipeline of nuclear power plant | |
| CN209296544U (en) | Underwater equipment corrosion potential data detection system | |
| CN113355677B (en) | Multifunctional connecting device for monitoring operation state of sacrificial anode | |
| CN217878817U (en) | Metal structure corrosion monitoring device under stripping coating in wet environment | |
| CN1050090A (en) | Hydrogen-cracking detector for nodes in ocean platform | |
| JPH0524049Y2 (en) | ||
| CN100425996C (en) | Electrical measurement method for safety theft prevention of oil/gas pipe line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |