Power failure measurement and protection apparatus for constant potential rectifier of pipeline
A potentiostat and pipeline technology, applied in the field of pipeline systems, can solve the problems of excessive maximum allowable current margin of the interrupter, overprotection of the cathode, stripping, etc.
Active Publication Date: 2014-01-29
PIPECHINA SOUTH CHINA CO
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Problems solved by technology
At present, the practice of not considering the potential impact in the measurement of power-off potential is not conducive to the safe operation of pipelines
In addition, due to the uncertainty of the maximum value of the potential impact peak, for safety reasons, the maximum allowable current margin of the selected interrupter is usually too large, and such interrupters are relatively expensive
[0003] CN202063999U discloses a buried pipeline cathodic protection power-off potential detection device, CN202030825U discloses a deep well anode cathodic protection device for protecting buried steel pipelines, and US7633302B2 discloses a cathodic protection monitor, but they all have pipeline Risk of overprotection and cathodic stripping caused by potential impact during power failure measurement of potentiostat
Method used
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Embodiment Construction
[0016] Embodiment. This example is an experimental prototype, and its constitution is as figure 1 shown. It consists of an anode ground bed, an interrupter, a limiter, a potentiostat, a pipeline 4, a test pile 5, an intelligent recorder, a high-speed collector, a reference electrode 9, and a notebook computer. The positive and negative poles of the potentiostat are respectively connected to the interrupter and the pipeline 4 through the limiter, the other side of the interrupter is connected to the anode bed, the test pile 5 is connected to the pipeline 4, and the intelligent recorder and the high-speed collector are respectively connected to the test pile 5 is connected with the reference electrode 9, and the usb interface of the high-speed collector is connected with the notebook computer.
[0017] in:
[0018] The anode bed is a shallow buried high-silicon cast iron anode bed;
[0019] The interrupter is Cath-Tech CI-25GPS Synchronized Current Interrupter;
[0020] The...
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The invention discloses a power failure measurement and protection apparatus for a constant potential rectifier of a pipeline, and relates to the technical field of a pipeline system. The power failure measurement and protection apparatus comprises an anode ground bed, an interrupter, a limiter, the constant potential rectifier, a test post, an intelligent recorder, a high-speed acquirer, a reference electrode and a notebook computer, wherein a positive pole and a negative pole of the constant potential rectifier are connected with the interrupter and the pipeline, respectively, the other side of the interrupter is connected with the anode ground bed, the test post is connected with the pipeline, the intelligent recorder and the high-speed acquirer are connected with the test post and the reference electrode, respectively, and a USB (Universal Serial Bus) interface of the high-speed acquirer is connected with the notebook computer. According to the power failure measurement and protection apparatus, the overprotection and cathodic disbonding risk which are caused by potential shock during power failure measurement of the constant potential rectifier of the pipeline are avoided.
Description
technical field [0001] The invention is a pipeline constant potentiometer power failure measurement and protection device. It relates to the technical field of piping systems. Background technique [0002] At present, the evaluation of the effectiveness of pipeline cathodic protection mainly adopts the power-off potential index, and the power-off potential measurement method is mainly the instantaneous synchronous interruption method of the potentiostat. There will be a potential shock at the moment of power-on, and the peak of the instantaneous potential shock will increase with the prolongation of the power-off period. It is lower than -1.2V or -1.5V, therefore, the excessive potential impact neither meets the standard requirements, but also causes a certain degree of damage to the pipeline and the anti-corrosion layer. It takes 24 days to measure the distance between one station and 3PE anti-corrosion layer, especially the cathodic stripping caused by negative potential...
Claims
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IPC IPC(8): C23F13/22
Inventor 张丰王维斌薛致远毕武喜赵君刘玲莉熊金根安龙虎
Owner PIPECHINA SOUTH CHINA CO