Pipeline cathodic protection potential automatic acquisition instrument

Abstract

A pipeline cathodic protection potential automatic collector is provided. A DC / DC boost module and a battery pack are added to the collector. The DC / DC boost module uses the DC voltage difference between the ground potential and the pipeline's negative cathodic protection potential as input voltage for boosting. The boosted DC power charges the battery pack. The battery pack provides sufficient, continuous, and long-term power supply to the collector's various power circuits and circuit modules, avoiding the need for frequent replacement of built-in batteries.

Description

Technical field

[0001] The present invention relates to an automatic collector of pipeline cathodic protection potential, in particular to an automatic collector of pipeline cathodic protection potential which does not require an external power supply and does not rely on its own disposable batteries, but relies solely on power from an internal cathodic protection system and can operate normally and permanently. Background Art

[0002] At present, in the cathodic protection system of oil and gas pipelines, the power supply of the pipeline cathodic protection potential automatic collector is a disposable battery. Due to the limitation of the disposable battery capacity, the frequency of cathodic protection parameters and corrosion data collected by the potential automatic collector and the continuous working time are greatly restricted. Frequent battery replacement increases the workload of inspection and maintenance. Summary of the Invention

[0003] In order to overcome the disadvantage of existing automatic pipeline cathodic protection potential collectors that require frequent battery replacement, the present invention provides an automatic pipeline cathodic protection potential collector that is self-powered by the internal cathodic protection system. This automatic cathodic protection potential collector can not only automatically collect and transmit pipeline cathodic protection potential and corrosion data, but also provide sufficient and permanent power to the automatic pipeline cathodic protection potential collector without an external power supply and built-in disposable batteries.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] It includes a test pile with a base and a pile body buried underground, a sensor module buried in the soil outside the test pile and a buried pipeline that has been cathodically protected, a grounding wire connected from the test pile body to the buried grounding body, a terminal board and a data acquisition instrument installed in the test pile body, a communication antenna installed at the upper end of the test pile body, or an optical cable junction box and a main optical cable junction box of the acquisition instrument installed outside the test pile; the aforementioned sensor module buried in the soil can be one of a reference tube, a polarization probe, and a reference electrode.

[0006] Use wires to electrically connect the cathodically protected pipeline and the wiring board to the cathodic protection signal test input terminal of the data acquisition instrument in sequence; use wires to electrically connect the sensor module and the wiring board to the reference input terminal of the data acquisition instrument in sequence; then use wires to electrically connect the output terminal of the data acquisition instrument to the communication antenna, or then use the output wire tail cable of the data acquisition instrument to electrically connect it to the optical cable junction box of the acquisition instrument, and the optical fiber pigtail output is output from the optical cable junction box of the acquisition instrument.

[0007] When the cathodic protection potential automatic data acquisition instrument is of wireless communication type, the cathodic protection parameters and corrosion data collected by the sensor module and the cathodic protection pipeline are input into the data acquisition instrument, and after collection, storage and data conversion, the data is wirelessly transmitted through the communication antenna;

[0008] When the cathodic protection potential automatic data acquisition instrument is of optical fiber communication type, the cathodic protection parameters and corrosion data collected by the sensor module and the cathodic protection pipeline are input into the data acquisition instrument. After collection, storage and data conversion, they are converted into optical communication signals through the optical cable junction box of the acquisition instrument and output by the optical fiber pigtail of the optical cable junction box.

[0009] The power supply circuit set up in the test pile includes a DC / DC boost module, a battery pack and a diode; the electrical connection relationship between each module and component is: the positive and negative poles of the output end of the DC / DC boost module are respectively electrically connected to the positive and negative poles of the battery pack; the positive and negative poles of the battery pack are electrically connected to the corresponding positive and negative ports of the power input end of the data acquisition instrument; the positive pole of the input end of the DC / DC boost module is electrically connected to the metal pile body of the test pile, and is electrically connected to the grounding body through the grounding wire; the negative pole of the input end of the DC / DC boost module is connected in series with a diode in the positive and negative directions in sequence, and then electrically connected to the protected pipeline.

[0010] The power supply circuit scheme of the pipeline cathodic protection potential automatic acquisition instrument is:

[0011] The DC negative potential difference between the negative potential of the cathode protection of the collection pipeline and the earth potential is used as the input voltage of the DC / DC boost module. The DC / DC boost method of the DC / DC boost module is used to boost the voltage. The boosted positive DC power charges the battery pack, which then supplies power to the data acquisition instrument and various power circuits.

[0012] A non-reverse unidirectional circuit with a diode is used in the negative pole circuit at the input end of the DC / DC boost module to prevent the potential at the input end of the power supply circuit from affecting the accuracy of the pipeline power-off potential test.

[0013] The beneficial effect of the present invention is that, in the absence of an external power supply and disposable batteries, the pipeline's own cathodic protection current is used as a power source, and the battery pack is charged after DC boosting, thereby providing sufficient and long-term power supply for the normal operation of the pipeline cathodic protection potential automatic collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] Figure 1 It is a circuit system diagram of the wireless transmission type of the present invention.

[0016] Figure 2 It is a circuit system diagram of the optical fiber communication type of the present invention.

[0017] Figure 3 This is a circuit wiring diagram of the reference tube type sensor module of the present invention.

[0018] Figure 4This is a circuit wiring diagram of the polarization probe type sensor module of the present invention.

[0019] Figure 5 This is a circuit wiring diagram of the reference electrode type sensor module of the present invention.

[0020] In the figure, 1. pipeline, 2. sensor module, 3. terminal block, 4. communication antenna, 5. test pile, 6. data acquisition instrument, 7. battery pack, 8. DC / DC boost module, 9. diode, 10. grounding body, 11. data acquisition instrument fiber optic splice box, 12. fiber optic pigtail. DETAILED DESCRIPTION

[0021] exist Figure 1 In the circuit system diagram of the wireless transmission type pipeline cathodic protection potential automatic acquisition instrument:

[0022] Sequentially electrically connect the cathodically protected pipeline (1) and the terminal block (3) to the cathodically protected signal test input terminal of the data acquisition instrument (6).

[0023] Sequentially electrically connect the sensor module (2) and the wiring board (3) to the reference input terminal of the data acquisition instrument (6).

[0024] Sequentially electrically connecting the output terminal of the data acquisition instrument (6) to the communication antenna (4),

[0025] In the charging power supply circuit, the positive and negative electrodes of the output end of the DC / DC boost module (8) are electrically connected to the positive and negative electrodes of the battery pack (7) respectively; the positive electrode of the input end of the DC / DC boost module (8) is electrically connected to the metal pile body of the test pile (5) and is electrically connected to the buried grounding body (10) through a grounding wire; and the negative electrode of the input end of the DC / DC boost module (8) is connected in series in sequence according to the positive and negative directions of the diode (9) and then electrically connected to the protected pipeline (1).

[0026] exist Figure 2 In the circuit system diagram of the optical fiber communication transmission type pipeline cathodic protection potential automatic acquisition instrument:

[0027] Sequentially electrically connect the cathodically protected pipeline (1) and the terminal block (3) to the cathodically protected signal test input terminal of the data acquisition instrument (6).

[0028] Sequentially electrically connect the sensor module (2) and the wiring board (3) to the reference input terminal of the data acquisition instrument (6).

[0029] The output conductor tail cable of the data acquisition instrument (6) is electrically connected to the acquisition instrument optical cable connection box (11), and the optical fiber tail cable (12) is output from the acquisition instrument optical cable connection box (11).

[0030] In the DC charging circuit of the communication transmission type pipeline cathodic protection potential automatic collector, Figure 1 The DC charging power supply circuits are the same.

[0031] exist Figure 3 In the wireless transmission type pipeline cathode protection potential automatic acquisition instrument circuit, the sensor module (2) is a reference tube.

[0032] exist Figure 4 In the wireless transmission type pipeline cathode protection potential automatic acquisition instrument circuit, the sensor module (2) is a polarization probe.

[0033] exist Figure 5 In the wireless transmission type pipeline cathode protection potential automatic acquisition instrument circuit, the sensor module (2) is a reference electrode.

Claims

1. An automatic collector of pipeline cathodic protection potential, comprising: A test pile with the base and pile body buried underground, a sensor module buried in the soil outside the test pile and a buried pipeline that has been cathodically protected, a grounding body connected to the grounding wire from the test pile body and buried underground, a terminal block and data acquisition device installed in the test pile body, a communication antenna installed on the upper end of the test pile body, or a data acquisition device optical cable junction box installed outside the test pile; The sensor module buried in the soil may be one of a reference tube, a polarization probe, and a reference electrode; Sequentially electrically connect the cathodically protected pipeline and the wiring board to the cathodically protected signal test input terminal of the data acquisition instrument, sequentially electrically connect the sensor module and the wiring board to the reference input terminal of the data acquisition instrument, and sequentially electrically connect the data output wire of the data acquisition instrument to the communication antenna or to the optical cable junction box of the data acquisition instrument; The invention is characterized in that: the power supply circuit of the facility in the test pile includes a DC / DC boost module, a battery pack and a diode; the electrical connection relationship between each module and component is: the positive and negative poles of the output end of the DC / DC boost module are respectively electrically connected to the positive and negative poles of the battery pack; the positive and negative poles of the battery pack are electrically connected to the corresponding positive and negative pole ports of the power input end of the data acquisition instrument; the positive pole of the input end of the DC / DC boost module is electrically connected to the metal pile body of the test pile, and is electrically connected to the grounding body through the pile body by a grounding wire; the negative pole of the input end of the DC / DC boost module is connected in series in the direction of the positive and negative poles of the diode and then electrically connected to the protected pipeline.

2. The automatic collector of pipeline cathodic protection potential according to claim 1, characterized in that: The test pile has a pile body shape of a pile-shaped structure made of a steel pipe, or a box-shaped structure made of metal.

3. The power circuit method of the pipeline cathodic protection potential automatic acquisition instrument according to claim 1 is characterized by: The DC negative potential difference between the negative potential of the cathode protection of the collection pipeline and the earth potential is used as the input voltage of the DC / DC boost module. The DC / DC boost method of the DC / DC boost module is used to boost the voltage. The boosted positive DC power charges the battery pack, which then supplies power to the data acquisition instrument and various power circuits. A diode-type one-way circuit with reverse-stop function is used in the negative input circuit of the DC / DC boost module to prevent the potential at the input of the power supply circuit from affecting the accuracy of the pipeline power-off potential test.

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