CN114150322B - Portable auxiliary measuring device for measuring on-off electric potential of pipeline cathodic protection - Google Patents
Portable auxiliary measuring device for measuring on-off electric potential of pipeline cathodic protection Download PDFInfo
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- CN114150322B CN114150322B CN202010927609.9A CN202010927609A CN114150322B CN 114150322 B CN114150322 B CN 114150322B CN 202010927609 A CN202010927609 A CN 202010927609A CN 114150322 B CN114150322 B CN 114150322B
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- 238000004210 cathodic protection Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 75
- 230000010287 polarization Effects 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 34
- 238000005259 measurement Methods 0.000 claims description 29
- 239000002689 soil Substances 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 abstract description 11
- 230000005611 electricity Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
Abstract
The invention provides a portable auxiliary measuring device for measuring a cathodic protection on-off electric potential of a pipeline, which comprises a shell, a meter pen access end, two external test ends, an on-off switch unit, an on-off period selection unit and an on-off control unit, wherein the shell is connected with the meter pen access end; the meter pen access end and the external test end are arranged on the shell and are used for being connected with a negative electricity end meter pen of the universal meter and a test pile polarization test piece and a pipeline; the positive electrode pen of the universal meter is connected with the reference electrode; the two external test ends are connected and an on-off switch unit is arranged on the circuit; the meter pen access end is also connected with an external test end connected with the test pile polarization test piece; the on-off period selection unit is connected with the signal control end of the on-off control unit; the signal output end of the on-off control unit is respectively connected with the reset signal input end circuit of the on-off control unit and the on-off switch unit through the first and second switch devices so as to realize periodic on-off of a potential measuring loop of the test pile polarization test piece of the pipeline with cathode protection.
Description
Technical Field
The invention relates to an auxiliary measuring device of a universal meter, in particular to a portable auxiliary measuring device for measuring on-off electric potential of pipeline cathodic protection.
Background
At present, the detection of the corrosion condition of the pipeline with cathodic protection is generally known by measuring the on-off electric potential of the reference electrode and the pipeline which are distributed at the periphery of the pipeline, and because the pipeline has a longer length, the on-off electric potential of the reference electrode and the reference electrode is measured relatively difficultly, so that the on-off electric potential is measured by the test pile polarization test piece buried in the adjacent pipeline, namely, the test pile polarization test piece is connected with the pipeline, and then the on-off electric potential is measured by the reference electrode and the test pile polarization test piece. According to the requirements of GB/T21246 of the method for measuring cathode protection parameters of buried steel pipelines, the on-off period of a polarized test piece of a test pile is in accordance with two types of 4/1s and 12/3s, namely, the periodic measurement of the measured power-on potential time is 4 seconds and the measured power-off potential time is 1 second, or the periodic measurement of the measured power-on potential time is 12 seconds and the measured power-off potential time is 3 seconds, and the two on-off periods can be freely selected. At present, the on-off potential measurement of the test pile polarization test piece is mainly operated by a manual mode, the control of the on-off period during the measurement is realized by manually controlling the contact time between a negative electric end meter pen of a universal meter and the test pile polarization test piece, and the manual operation mode is difficult to ensure that the on-off period control of the test pile polarization test piece meets the requirement of the buried steel pipeline cathodic protection parameter measurement method GB/T21246 during the actual construction operation.
Therefore, how to design a portable auxiliary measuring device capable of realizing accurate on-off periodic control of a potential measuring loop of a test pile polarization test piece of a pipeline with cathodic protection has become one of the technical problems to be solved in the art.
Disclosure of Invention
The technical problem to be solved by the technical scheme is how to provide a portable auxiliary measuring device capable of accurately controlling the on-off periodicity of a potential measuring loop of a test pile polarization test piece of a pipeline with cathodic protection.
For solving the technical problem, the technical scheme provides a portable auxiliary measuring device for measuring the on-off electric potential of the cathodic protection of a pipeline, which comprises: the device comprises a shell, a meter pen access end, two external test ends, an on-off switch unit, an on-off period selection unit and an on-off control unit; the meter pen access end is arranged on the shell and is used for being connected with a negative electrode end meter pen of the universal meter, and a positive electrode end meter pen of the universal meter is connected with a reference electrode which is positioned in soil and is close to the pipeline; the two external test ends are also arranged on the shell, one external test end is used for connecting a test pile polarization test piece, the other external test end is used for connecting a pipeline, the two external test ends are electrically connected, and an on-off switch unit is arranged on a connecting line; the meter pen access end is electrically connected with an external test end for connecting a test pile polarization test piece; the on-off period selection unit is electrically connected with the signal control end of the on-off control unit; the signal output end of the on-off control unit is electrically connected with the reset signal input end circuit of the on-off control unit through a first switching device, and the signal output end of the on-off control unit is also electrically connected with the on-off switching unit through a second switching device; the on-off period selection unit selects different control signals to the signal control end so as to control the signal output of the signal output end of the on-off control unit, and further control the reset period of the on-off control unit and the closing period of the on-off switch unit. With this, this technical scheme's portable auxiliary measuring device has replaced manual operation's break-make periodic control with the periodic control of break-make control unit to signal output, has realized the accurate periodic break-make of the potential measurement return circuit of the test pile polarization test block to the pipeline that has cathodic protection to greatly improved the accuracy to test pile polarization test block break-make potential measurement data, provided the data guarantee for accurately knowing the corrosion condition of the pipeline that has cathodic protection.
As another implementation of the technical scheme, the on-off control unit is a 14-level frequency divider with the model of CD 4060; the signal control end of the on-off control unit comprises: the signal input end, the signal forward output end and the signal reverse output end; the signal output end of the on-off control unit comprises: a first output terminal and a second output terminal; the on-off period selection unit is electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit; the first output end and the second output end of the on-off control unit are respectively and electrically connected with a reset signal input end circuit of the on-off control unit through a first switching device, and the first output end is also electrically connected with the on-off switching unit through a second switching device; the on-off period selection unit controls the signal output of the first output end and the second output end of the on-off control unit by selecting different input signals, forward output signals and reverse output signals.
As another implementation of the present technical solution, the portable auxiliary measurement device further includes: a light emitting prompt unit; the luminous prompting unit comprises: a light emitting part and a comparator electrically connected to each other; the light-emitting part is arranged on the shell, and the comparator is electrically connected with the first output end; when the comparator judges that the signal output of the first output end is at a low level, the light emitting part is lightened. Therefore, the state of on-off electric potential measurement of an operator can be prompted by the lighting or the switching-off of the light emitting part, for example, the power-off electric potential measurement is performed when the light emitting part is lighted, and the power-on electric potential measurement is performed when the light emitting part is switched off.
As another implementation of the present technical solution, the portable auxiliary measurement device further includes: a buzzer; the buzzer is electrically connected with the comparator; when the comparator judges that the signal output of the first output end is at a low level, the buzzer sounds. Therefore, a prompting means can be additionally added to prompt the operator of the state of on-off electric potential measurement.
As another implementation of the present technical solution, the portable auxiliary measurement device further includes: a battery; the battery is arranged in the shell and is electrically connected with the on-off switch unit, the on-off period selection unit, the on-off control unit, the luminous prompting unit and the buzzer to provide power. Therefore, the convenience of the portable auxiliary measuring device can be improved.
As another implementation of the technical scheme, the on-off period selection unit is a selection switch circuit and is provided with a first resistance-capacitance element, a second resistance-capacitance element and a selection switch arranged on the shell; the selection switch is triggered to enable the selection switch circuit to select the first resistance-capacitance element or the second resistance-capacitance element to be electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit, so that the signal output of the first output end and the second output end of the on-off control unit is controlled.
As another implementation of the technical scheme, the first resistor-capacitor element is composed of a first signal input end resistor, a first signal forward output end capacitor and a first signal reverse output end resistor, wherein one ends of the first signal input end resistor, the first signal forward output end capacitor and the first signal reverse output end resistor are electrically connected with each other, and the other ends of the first signal input end resistor, the first signal forward output end capacitor and the first signal reverse output end resistor are electrically connected with the signal input end, the signal forward output end and the signal reverse output end through a switch controlled by a selection switch circuit; the second resistor-capacitor element is composed of a second signal input end resistor, a second signal forward output end capacitor and a second signal reverse output end resistor, wherein one ends of the second signal input end resistor, the second signal forward output end capacitor and the second signal reverse output end resistor are electrically connected with each other, and the other ends of the second signal input end resistor, the second signal forward output end capacitor and the second signal reverse output end resistor are electrically connected with the signal input end, the signal forward output end and the signal reverse output end through a switch controlled by a selection switch circuit; and the resistance of the first signal input end resistor is different from that of the second signal input end resistor, the capacitance of the first signal forward output end capacitor is different from that of the second signal forward output end capacitor, and the resistance of the first signal reverse output end resistor is different from that of the second signal reverse output end resistor.
As another implementation of the technical scheme, the selection switch circuit further comprises two selection indicator lamps arranged on the shell; when the selection switch circuit selects the first resistance-capacitance element to be electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit, a corresponding selection indicator lamp is lighted; when the selection switch circuit selects the second resistance-capacitance element to be electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit, the corresponding other selection indicator lamp is lighted. Therefore, the method can conveniently prompt operators of the period of the current on-off potential measurement.
As another implementation of the technical scheme, the first switching device is a diode, and the second switching device is a triode; the reset signal input end circuit is a circuit formed by connecting a positive end of a power supply to a reset signal input end of the on-off control unit through a diode; the first output end and the second output end are respectively and electrically connected with the cathodes of the two diodes through circuits, the anodes of the two diodes are electrically connected with the anodes of the diodes on the circuit of the reset signal input end through circuits, and the cathodes of the diodes on the circuit of the reset signal input end are electrically connected with the reset signal input end through circuits; the first output end is electrically connected with the base electrode of the triode through a circuit, the collector electrode of the triode is electrically connected with the on-off switch unit, and the emitting electrode of the triode is grounded.
As another implementation of the technical scheme, the on-off switch unit is a relay.
Drawings
FIG. 1 is a schematic view of the portable auxiliary measuring device for cathodic protection on-off potential measurement of a pipeline according to the present invention;
fig. 2 is a schematic circuit diagram of a portable auxiliary measuring device for measuring the on-off electric potential of the cathodic protection of the pipeline.
Symbol description in the drawings:
10. a housing; 11. a stylus access end; 12. externally connecting a testing end; 13. a selection switch; 14. selecting an indicator light; 15. a light emitting section; a 16 buzzer; 2. an on-off switch unit; 3. an on-off control unit; CIN signal input terminal; COUT1 signal forward output terminal; a COUT2 signal reverse output terminal; RST reset signal input; a first output terminal of Q14; a second output terminal of Q10; 4. a first switching device; 5. a second switching device; 6. a selection switch circuit; 7, a universal meter; 71. a reference electrode; 8. a pipe; 81. testing a pile polarization test piece; r1 is a first signal input end resistor; c1 A first signal forward output capacitance; r11 is a first signal reverse output end resistor; r2 is a second signal input end resistor; c2 A second signal positive output end capacitor; r22 second signal reverse output terminal resistance.
Detailed Description
The detailed description and technical content of the present invention are described below with reference to the drawings, which are, however, provided for reference and illustration only and are not intended to limit the present invention.
As shown in fig. 1 and 2, the external schematic view and the circuit structure schematic view of the portable auxiliary measuring device for the on-off electric potential measurement of the cathodic protection of the pipeline according to the present invention are respectively shown. This a portable auxiliary measuring device for pipeline cathodic protection on-off current potential measurement, in short, portable auxiliary measuring device below, it includes: the meter pen comprises a shell 10, a meter pen access end 11, two external test ends 12, an on-off switch unit 2, an on-off period selection unit and an on-off control unit 3; the meter pen access end 11 is arranged on the shell 10, and the meter pen access end 11 is used for being connected with a negative electrode meter pen of the universal meter 7, and a positive electrode meter pen of the universal meter 7 is connected with a reference electrode 71 which is positioned in soil and is adjacent to the pipeline 8; the two external test terminals 12 are also disposed on the housing 10, one of the external test terminals 12 is used for connecting the test pile polarization test piece 81, the other external test terminal 12 is used for connecting the pipeline 8, and the two external test terminals 12 are electrically connected inside the housing 10 and are provided with the on-off switch unit 2 on the connecting line. The pen access end 11 is electrically connected with an external test end 12 for connecting a test pile polarization test piece 81 in the shell 10; the on-off period selection unit is electrically connected with the signal control end of the on-off control unit 3; the signal output end of the on-off control unit 3 is electrically connected with the reset signal input end circuit of the on-off control unit 3 through a first switching device 4, and the signal output end of the on-off control unit 3 is also electrically connected with the on-off switching unit 2 through a second switching device 5; the on-off period selection unit selects different control signals to the signal control end so as to control the signal output of the signal output end of the on-off control unit 3, and further control the reset period of the on-off control unit 3 and the closing period of the on-off switch unit 2.
In more detail, the on-off control unit 3 is a 14-stage frequency divider with a model of CD4060, and the 14-stage frequency divider is a device with a periodic oscillation element inside, and is an existing component, so the invention will not be described in detail. The signal control end of the on-off control unit 3 includes: a signal input terminal CIN, a signal forward output terminal COUT1 and a signal reverse output terminal COUT2; the signal output end of the on-off control unit 3 includes: the first output terminal Q14 and the second output terminal Q10. As shown in fig. 2, the first output terminal Q14 and the second output terminal Q10 may be a 14-division output terminal and a 10-division output terminal of the 14-stage frequency divider, however, other frequency division output terminals of the 14-stage frequency divider may be used as the signal output terminals in the present embodiment, which is not limited in this disclosure. The on-off period selection unit is electrically connected with a signal input end CIN, a signal forward output end COUT1 and a signal reverse output end COUT2 of the on-off control unit 3; the first output end Q14 and the second output end Q10 of the on-off control unit 3 are respectively and electrically connected with a reset signal input end circuit of the on-off control unit 3 through a first switching device 4, and the first output end Q14 is also electrically connected with the on-off switching unit 2 through a second switching device 5; the on-off period selecting unit controls the signal output of the first output end Q14 and the second output end Q10 of the on-off control unit 3 by selecting different input signals, forward output signals and reverse output signals.
In the invention, the on-off period selection unit can be a selection switch circuit 6, and is provided with a first resistance-capacitance element, a second resistance-capacitance element and a selection switch 13 arranged on the shell; by touching the selection switch 13, an operator can make the selection switch circuit 6 select the first resistor-capacitor element or the second resistor-capacitor element to be electrically connected with the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 of the on-off control unit 3, so as to control the signal output of the first output end Q14 and the second output end Q10 of the on-off control unit 3. The first resistor-capacitor element may be composed of a first signal input end resistor R1, a first signal forward output end capacitor C1 and a first signal reverse output end resistor R11, wherein one ends of the first signal input end resistor R1, the first signal forward output end capacitor C1 and the first signal reverse output end resistor R11 are electrically connected with each other, and the other ends thereof are electrically connected with the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 through the switch controlled by the selection switch circuit 6; the second resistor-capacitor element is composed of a second signal input end resistor R2, a second signal forward output end capacitor C2 and a second signal reverse output end resistor R22, wherein one end of the second signal input end resistor R2, one end of the second signal forward output end capacitor C2 and one end of the second signal reverse output end resistor R22 are electrically connected with each other, and the other end of the second signal forward output end capacitor C2 and the other end of the second signal reverse output end resistor R22 are electrically connected with the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 through a switch controlled by a selection switch circuit 6; and the resistance of the first signal input end resistor R1 is different from the resistance of the second signal input end resistor R2, the capacitance of the first signal forward output end capacitor C1 is different from the capacitance of the second signal forward output end capacitor C2, and the resistance of the first signal reverse output end resistor R11 is different from the resistance of the second signal reverse output end resistor R22. By selecting the switching circuit 6 to select different resistance-capacitance elements (the first resistance-capacitance element or the second resistance-capacitance element), the on-off period can be multiplied or reduced under the condition of not changing the frequency division output end of the 14-stage separation device, so that the technical scheme of the invention can meet the requirements of the buried steel pipeline cathode protection parameter measurement method GB/T21246 on the on-off period of the test pile polarization test piece, namely, the on-off period of the test pile polarization test piece meets the requirements of two standards of 4/1s and 12/3 s. In addition, the selection switch circuit 6 further includes two selection indicator lights 14 with different colors disposed on the housing 10, and the selection indicator lights 14 may be light emitting diodes. When the selection switch circuit 6 selects the first resistor-capacitor element to be electrically connected with the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 of the on-off control unit, a corresponding selection indicator lamp 14 is lightened; when the selection switch circuit 6 selects the second resistor-capacitor element to be electrically connected with the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 of the on-off control unit, the corresponding other selection indicator lamp 14 is lightened, so that an operator can be conveniently prompted about the period of on-off electric potential measurement currently used.
In the present invention, the first switching device 4 may be a diode, and the second switching device 5 may be a triode. The reset signal input circuit is a circuit formed by connecting the positive terminal of the power supply to the reset signal input RST of the on-off control unit 3 through a diode. The first output end Q14 and the second output end Q10 are respectively and electrically connected with the cathodes of two diodes through circuits, the anodes of the two diodes are electrically connected with the anodes of the diodes on the reset signal input end circuit through circuits, and the cathodes of the diodes on the reset signal input end circuit are electrically connected with the reset signal input end RST through circuits. The first output end Q14 is electrically connected to the base electrode of the triode through a circuit, the collector electrode of the triode is electrically connected to the on-off switch unit 2, and the emitter electrode of the triode is grounded. And the on-off switching unit 2 may be a relay.
In the present invention, the portable auxiliary measuring device may further include: a light emitting prompt unit; as shown in fig. 1, the light emitting prompt unit includes: a light emitting portion 15 and a comparator (not shown) electrically connected to each other; the light emitting part 15 is arranged on the shell 10, and the comparator is electrically connected with the first output end; when the comparator judges that the signal output of the first output end is at a low level, the light emitting part 15 is lightened, so that the state of on-off electric potential measurement of an operator can be prompted by the lightening or turning off of the light emitting part, for example, when the light emitting part is lightened, the power-off electric potential measurement is carried out, and when the light emitting part is turned off, the power-on electric potential measurement is carried out. In addition, the portable auxiliary measuring device may further include: a buzzer 16; the buzzer 16 is electrically connected with the comparator; when the comparator judges that the signal output of the first output end is at a low level, the buzzer sounds, so that a prompting means can be additionally added to prompt an operator of the state of on-off electric potential measurement. In addition, the portable auxiliary measuring device may further include: a battery (not shown); the battery is arranged in the shell and is electrically connected with the on-off switch unit, the on-off period selection unit, the on-off control unit, the luminous prompting unit and the buzzer, so that a 12V direct current voltage source is provided for the components or the circuit, and the convenience of the portable auxiliary measuring device in use can be improved due to the arrangement of the battery.
In summary, the portable auxiliary measuring device according to the technical scheme replaces manual power on-off periodic control by the on-off control unit for periodic control of signal output, and realizes accurate periodic on-off of the potential measuring loop of the test pile polarization test piece of the pipeline with cathodic protection, thereby greatly improving the accuracy of the on-off potential measuring data of the test pile polarization test piece and providing data guarantee for accurately knowing the corrosion condition of the pipeline with cathodic protection.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the invention, and other equivalent variations using the inventive concepts are intended to fall within the scope of the invention.
Claims (7)
1. A portable auxiliary measuring device for cathodic protection on-off electrical potential measurement of a pipeline for periodically on-off a potential measuring loop of a test pile polarization test piece of the pipeline with cathodic protection, the portable auxiliary measuring device comprising: the device comprises a shell, a meter pen access end, two external test ends, an on-off switch unit, an on-off period selection unit and an on-off control unit; the meter pen access end is arranged on the shell and is used for being connected with a meter pen at the negative end of the universal meter, and the meter pen at the positive end of the universal meter is connected with a reference electrode which is positioned in soil and is close to the pipeline; the two external test ends are arranged on the shell, one external test end is used for connecting the test pile polarization test piece, the other external test end is used for connecting the pipeline, the two external test ends are electrically connected, and the on-off switch unit is arranged on a connecting line; the meter pen access end is electrically connected with an external test end for connecting the test pile polarization test piece; the on-off period selection unit is electrically connected with the signal control end of the on-off control unit; the signal output end of the on-off control unit is electrically connected with the reset signal input end circuit of the on-off control unit through a first switching device, and the signal output end of the on-off control unit is also electrically connected with the on-off switching unit through a second switching device; the on-off period selection unit selects different control signals for the signal control end to control signal output of the signal output end of the on-off control unit, so as to control the reset period of the on-off control unit and the closing period of the on-off switch unit;
the on-off period selection unit is a selection switch circuit and is provided with a first resistance-capacitance element, a second resistance-capacitance element and a selection switch arranged on the shell; the selection switch is triggered to enable the selection switch circuit to select the first resistance-capacitance element or the second resistance-capacitance element to be electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit, so that the signal output of the first output end and the second output end of the on-off control unit is controlled;
the first resistor-capacitor element is composed of a first signal input end resistor, a first signal forward output end capacitor and a first signal reverse output end resistor, one ends of the first signal input end resistor, the first signal forward output end capacitor and the first signal reverse output end resistor are electrically connected with each other, and the other ends of the first signal input end resistor, the first signal forward output end capacitor and the first signal reverse output end resistor are electrically connected with the signal input end, the signal forward output end and the signal reverse output end through switches controlled by the selection switch circuit; the second resistor-capacitor element is composed of a second signal input end resistor, a second signal forward output end capacitor and a second signal reverse output end resistor, one ends of the second signal input end resistor, the second signal forward output end capacitor and the second signal reverse output end resistor are electrically connected with each other, and the other ends of the second signal input end resistor, the second signal forward output end capacitor and the second signal reverse output end resistor are electrically connected with the signal input end, the signal forward output end and the signal reverse output end through switches controlled by the selection switch circuit; the resistance of the first signal input end resistor is different from that of the second signal input end resistor, the capacitance of the first signal forward output end capacitor is different from that of the second signal forward output end capacitor, and the resistance of the first signal reverse output end resistor is different from that of the second signal reverse output end resistor;
the on-off switch unit is a relay.
2. The portable auxiliary measuring device for cathodic protection on-off potential measurement of a pipeline according to claim 1, wherein said on-off control unit is a 14-stage frequency divider device of model CD 4060; the signal control end of the on-off control unit comprises: the signal input end, the signal forward output end and the signal reverse output end; the signal output end of the on-off control unit comprises: a first output terminal and a second output terminal; the on-off period selection unit is electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit; the first output end and the second output end of the on-off control unit are respectively and electrically connected with a reset signal input end circuit of the on-off control unit through a first switching device, and the first output end is also electrically connected with the on-off switching unit through a second switching device; the on-off period selection unit is used for controlling the signal output of the first output end and the second output end of the on-off control unit by selecting different input signals, forward output signals and reverse output signals.
3. The portable auxiliary measuring device for cathodic protection on-off potential measurement of a conduit according to claim 2, further comprising: a light emitting prompt unit; the light emitting prompt unit includes: a light emitting part and a comparator electrically connected to each other; the light-emitting part is arranged on the shell, and the comparator is electrically connected with the first output end; and when the comparator judges that the signal output of the first output end is at a low level, the light emitting part is lightened.
4. A portable auxiliary measuring device for cathodic protection on-off potential measurement of a pipeline according to claim 3, further comprising: a buzzer; the buzzer is electrically connected with the comparator; when the comparator judges that the signal output of the first output end is at a low level, the buzzer sounds.
5. The portable auxiliary measuring device for cathodic protection on-off potential measurement of a conduit of claim 4 further comprising: a battery; the battery is arranged in the shell and is electrically connected with the on-off switch unit, the on-off period selection unit, the on-off control unit, the luminous prompting unit and the buzzer to provide power.
6. The portable auxiliary measuring device for cathodic protection on-off potential measurement of a pipeline according to claim 1 wherein said selection switch circuit further comprises two selection indicator lights disposed on said housing; when the selection switch circuit selects the first resistance-capacitance element to be electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit, a corresponding selection indicator lamp is lightened; when the selection switch circuit selects the second resistance-capacitance element to be electrically connected with the signal input end, the signal forward output end and the signal reverse output end of the on-off control unit, the corresponding other selection indicator lamp is lightened.
7. The portable auxiliary measuring device for cathodic protection on-off potential measurement of a pipeline according to claim 2 wherein said first switching device is a diode and said second switching device is a triode; the reset signal input end circuit is a circuit formed by connecting a positive end of a power supply to a reset signal input end of the on-off control unit through a diode; the first output end and the second output end are respectively and electrically connected with the cathodes of the two diodes through circuits, the anodes of the two diodes are electrically connected with the anodes of the diodes on the circuit of the reset signal input end through circuits, and the cathodes of the diodes on the circuit of the reset signal input end are electrically connected with the reset signal input end through circuits; the first output end is electrically connected with the base electrode of the triode through a circuit, the collector electrode of the triode is electrically connected with the on-off switch unit, and the emitting electrode of the triode is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010927609.9A CN114150322B (en) | 2020-09-07 | 2020-09-07 | Portable auxiliary measuring device for measuring on-off electric potential of pipeline cathodic protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010927609.9A CN114150322B (en) | 2020-09-07 | 2020-09-07 | Portable auxiliary measuring device for measuring on-off electric potential of pipeline cathodic protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114150322A CN114150322A (en) | 2022-03-08 |
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| US4591792A (en) * | 1984-02-08 | 1986-05-27 | Gas Research Institute | Method and apparatus for measuring the polarized potential of a buried or submerged structure protected by impressed current |
| CN105040001A (en) * | 2015-07-06 | 2015-11-11 | 中国石油化工股份有限公司 | Cathode protection data collecting device for buried pipeline |
| CN106835150A (en) * | 2017-03-07 | 2017-06-13 | 佛山市天然气高压管网有限公司 | A kind of cathodic protection system polarization potential measuring instrument and evaluation method |
| CN108441864A (en) * | 2018-05-31 | 2018-08-24 | 上海航天能源股份有限公司 | A kind of cathodic protection test device and its test method |
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| CN109306490A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | Cathodic protection test device |
| CN212316247U (en) * | 2020-09-07 | 2021-01-08 | 山东省天然气管道有限责任公司 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8310251B2 (en) * | 2007-01-03 | 2012-11-13 | University Of Florida Research Foundation, Inc. | System for assessing pipeline condition |
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| US4591792A (en) * | 1984-02-08 | 1986-05-27 | Gas Research Institute | Method and apparatus for measuring the polarized potential of a buried or submerged structure protected by impressed current |
| CN105040001A (en) * | 2015-07-06 | 2015-11-11 | 中国石油化工股份有限公司 | Cathode protection data collecting device for buried pipeline |
| CN106835150A (en) * | 2017-03-07 | 2017-06-13 | 佛山市天然气高压管网有限公司 | A kind of cathodic protection system polarization potential measuring instrument and evaluation method |
| CN109306490A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | Cathodic protection test device |
| CN108441864A (en) * | 2018-05-31 | 2018-08-24 | 上海航天能源股份有限公司 | A kind of cathodic protection test device and its test method |
| CN109082671A (en) * | 2018-10-30 | 2018-12-25 | 广州发展集团股份有限公司 | Cathodic protection potential detection device and cathodic protection potential monitor system |
| CN212316247U (en) * | 2020-09-07 | 2021-01-08 | 山东省天然气管道有限责任公司 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
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| CN114150322A (en) | 2022-03-08 |
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Effective date of registration: 20230406 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: SHANDONG NATURAL GAS PIPELINE Co.,Ltd. Applicant after: SINOPEC PETROLEUM ENGINEERING Corp. Address before: No.77, Tianchen Road, Lixia District, Jinan City, Shandong Province, 250101 Applicant before: SHANDONG NATURAL GAS PIPELINE Co.,Ltd. Applicant before: SINOPEC PETROLEUM ENGINEERING Corp. |
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