CN212316247U - Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection - Google Patents
Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection Download PDFInfo
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- CN212316247U CN212316247U CN202021927876.8U CN202021927876U CN212316247U CN 212316247 U CN212316247 U CN 212316247U CN 202021927876 U CN202021927876 U CN 202021927876U CN 212316247 U CN212316247 U CN 212316247U
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Abstract
The utility model provides a portable auxiliary measuring device for measuring the on-off electric potential of the pipeline cathode protection, 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; the meter pen access end and the external test end are both arranged on the shell and are used for being connected with a meter pen at the negative electricity end of the multimeter, a test pile polarization test piece and a pipeline; a positive electricity end meter pen of the multimeter is connected with the reference electrode; the two external test ends are connected with each other, 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 and the on-off switch unit of the on-off control unit through the first switch device and the second switch device, so that the periodic on-off of the potential measurement loop of the polarization test piece of the test pile of the pipeline with the cathode protection is realized.
Description
Technical Field
The utility model relates to a universal meter auxiliary measuring device especially relates to a portable auxiliary measuring device who is used for pipeline cathodic protection break-make current potential to measure.
Background
At present, the corrosion condition of a pipeline with cathodic protection is usually detected by measuring the on-off electric potential of a reference electrode and the pipeline which are arranged on the periphery of the pipeline, and because the pipeline has longer length, the on-off electric potential of the reference electrode and the reference electrode is difficult to measure, so that the on-off electric potential is measured by means of a test pile polarization test piece buried in a nearby pipeline, namely, the test pile polarization test piece is connected with the pipeline, and then the on-off electric potential of the reference electrode and the test pile polarization test piece is measured. According to the requirements of 'buried steel pipeline cathodic protection parameter measurement method' GB/T21246, the on-off period of the polarization test piece of the test pile is 4/1s and 12/3s, namely the periodic measurement of measuring the electrified potential time for 4 seconds and the power-off potential time for 1 second, or the periodic measurement of measuring the electrified potential time for 12 seconds and the power-off potential time for 3 seconds, wherein the two on-off periods can be freely selected. At present, the on-off electric potential measurement of the polarization test piece of the test pile is mainly operated by a manual mode, the on-off period control during the measurement is realized by controlling the contact time of a negative electricity end meter pen of the multimeter and the polarization test piece of the test pile by a manual mode, and the on-off period control of the polarization test piece of the test pile is difficult to meet the requirements of a buried steel pipeline cathode protection parameter measurement method GB/T21246 by the manual mode during the actual construction operation.
Therefore, how to design a portable auxiliary measuring device capable of implementing accurate on-off periodic control of a potential measuring circuit of a polarization test piece of a testing pile of a pipeline with cathode protection becomes one of the technical problems to be solved in the field.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the technical scheme is how to provide a portable auxiliary measuring device capable of accurately and periodically controlling the power on/off of a potential measuring loop of a polarization test piece of a test pile of a pipeline with cathode protection.
In order to solve the above technical problem, the present technical solution provides a portable auxiliary measuring device for measuring the on-off potential of the cathode protection of the pipeline, which comprises: the meter pen on-off control 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 used for being connected with a meter pen at the negative electricity end of the universal meter, and the meter pen at the positive electricity end of the universal meter is connected with a reference electrode which is positioned in soil and 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 a reset signal input end circuit of the on-off control unit through a first switch device, and the signal output end of the on-off control unit is also electrically connected with the on-off switch unit through a second switch device; the on-off period selection unit controls the signal output of the signal output end of the on-off control unit by selecting different control signals for the signal control end, and further controls the reset period of the on-off control unit and the closing period of the on-off switch unit. Therefore, the portable auxiliary measuring device of the technical scheme replaces manual power on-off periodic control by periodic control of the on-off control unit on signal output, and realizes accurate periodic power on-off of the potential measuring loop of the polarization test piece of the test pile of the pipeline with the cathodic protection, so that the accuracy of the measurement data of the power on-off potential of the polarization test piece of the test pile is greatly improved, and data guarantee is provided for accurately knowing the corrosion condition of the pipeline with the cathodic protection.
As another implementation of the technical solution, the on-off control unit is a 14-level frequency division device with a model number 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 electrically connected with a reset signal input end circuit of the on-off control unit through a first switch device, and the first output end is also electrically connected with the on-off switch unit through a second switch 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 measuring device further includes: a light-emitting presentation unit; the light-emitting prompt unit includes: a light emitting section 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 determines that the signal output from the first output terminal is at a low level, the light emitting section is turned on. Thus, the state of the on-off potential measurement can be indicated to the operator by turning on or off the light emitting section, and if the light emitting section is turned on, the on-off potential measurement is performed, whereas if the light emitting section is turned off, the on-off potential measurement is performed.
As another implementation of the present technical solution, the portable auxiliary measuring 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 state of the on-off potential measurement of the operator.
As another implementation of the present technical solution, the portable auxiliary measuring 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 light-emitting prompting unit and the buzzer to provide power. Therefore, the use convenience of the portable auxiliary measuring device can be improved.
As another implementation of the present technical solution, the on-off period selecting unit is a selection switch circuit, and has a first resistance-capacitance element, a second resistance-capacitance element, and a selection switch disposed on the housing; the selection switch is touched 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 present technical solution, the first rc 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, and 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 to each other, and the other ends are electrically connected to the signal input end, the signal forward output end, and the signal reverse output end through a switch controlled by the selection switch circuit; the second resistance-capacitance 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 are electrically connected with the signal input end, the signal forward output end and the signal reverse output end through a switch controlled by the selection switch circuit; the resistance values of the first signal input end resistor and the second signal input end resistor are different, the capacitance values of the first signal forward output end capacitor and the second signal forward output end capacitor are different, and the resistance values of the first signal reverse output end resistor and the second signal reverse output end resistor are different.
As another implementation of the present technical solution, the selection switch circuit further includes two selection indicator lights disposed on the 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. Therefore, the on-off potential measuring period used by an operator at present can be conveniently prompted.
As another implementation of the present technical solution, 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 the positive end of a power supply to the reset signal input end of the on-off control unit through a diode; the first output end and the second output end are respectively electrically connected with the cathodes of the two diodes through circuits, the anodes of the two diodes are electrically connected with the anode of the diode on the reset signal input end circuit through the circuits, and the cathode of the diode on the reset signal input end circuit is electrically connected with the reset signal input end through the circuits; the first output end is also 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 present technical solution, the on-off switch unit is a relay.
Drawings
FIG. 1 is a schematic view of the appearance of the portable auxiliary measuring device for measuring the cathodic protection on-off potential of the pipeline according to the present invention;
fig. 2 is a schematic circuit structure diagram of the portable auxiliary measuring device for measuring the on-off potential of the cathodic protection of the pipeline of the utility model.
Symbolic illustration in the drawings:
10 a shell; 11 meter pen access end; 12 connecting the test terminal externally; 13 a selection switch; 14 selecting an indicator light; 15 a light emitting section; 16 a buzzer; 2 an on-off switch unit; 3 an on-off control unit; a CIN signal input terminal; a COUT1 signal positive output terminal; a COUT2 signal inverting output; an RST reset signal input end; a Q14 first output; a Q10 second output; 4 a first switching device; 5 a second switching device; 6 selecting a switch circuit; 7, a universal meter; 71 a reference electrode; 8, pipelines; 81 testing a polarization test piece of the pile; r1 first signal input terminal resistance; a capacitance of a forward output end of the C1 first signal; r11 first signal inverting output terminal resistance; r2 second signal input terminal resistance; a capacitor at the positive output end of the C2 second signal; r22 second signal inverts the output terminal resistance.
Detailed Description
The following detailed description and technical contents of the present invention are described with reference to the drawings, but the drawings are only for reference and illustration and are not intended to limit the present invention.
As shown in fig. 1 and 2, the appearance schematic diagram and the circuit structure schematic diagram of the portable auxiliary measuring device for measuring the on-off potential of the cathodic protection of the pipeline of the present invention are respectively shown. This a portable auxiliary measuring device for pipeline cathodic protection cut-off potential measurement, portable auxiliary measuring device is called for short hereinafter, it includes: the device 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, the meter pen access end 11 is used for being connected with a meter pen at the negative electricity end of the universal meter 7, and the meter pen at the positive electricity end of the universal meter 7 is connected with a reference electrode 71 which is located in soil and close to the pipeline 8; the two external test ends 12 are also disposed on the housing 10, one of the external test ends 12 is used for connecting the test pile polarization test piece 81, the other external test end 12 is used for connecting the pipeline 8, and the two external test ends 12 are electrically connected inside the housing 10 and are provided with the on-off switch unit 2 on the connection line. The meter 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 switch device 4, and the signal output end of the on-off control unit 3 is also electrically connected with the on-off switch unit 2 through a second switch device 5; the on-off period selection unit controls the signal output of the signal output end of the on-off control unit 3 by selecting different control signals for the signal control end, and further controls the reset period of the on-off control unit 3 and the closing period of the on-off switch unit 2.
In more detail, this on-off control unit 3 is the 14 grades of frequency division devices of model CD4060, and this 14 grades of frequency division devices are the inside device that is provided with periodic oscillation component, because it is a current components and parts, consequently the utility model discloses do not describe it repeatedly. The signal control terminal 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 COUT 2; the signal output end of the on-off control unit 3 comprises: a first output terminal Q14 and a second output terminal Q10. As shown in fig. 2, the first output terminal Q14 and the second output terminal Q10 may be a frequency division 14 output terminal and a frequency division 10 output terminal of a frequency division 14 device, however, other frequency division output terminals of the frequency division 14 device may also be used as signal output terminals in the present technical solution, which is not limited by the present invention. 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 electrically connected with the reset signal input end circuit of the on-off control unit 3 through the first switch device 4, and the first output end Q14 is also electrically connected with the on-off switch unit 2 through the second switch device 5; the on-off period selection 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 present invention, the on/off period selecting unit may be a selection switch circuit 6, and it has a first resistance-capacitance element, a second resistance-capacitance element and a selection switch 13 disposed on the housing; an operator can touch the selection switch 13 to make the selection switch circuit 6 select the first rc element or the second rc element to be electrically connected to the signal input terminal CIN, the signal forward output terminal COUT1 and the signal reverse output terminal COUT2 of the on-off control unit 3, so as to control the signal output of the first output terminal Q14 and the second output terminal Q10 of the on-off control unit 3. The first rc 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, one end of the first signal input end resistor R1, one end of the first signal forward output end capacitor C1 and one end of the first signal reverse output end resistor R11 are electrically connected to each other, and the other end of the first rc element is electrically connected to the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 through a switch controlled by the selection switch circuit 6; the second rc 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, and one ends of the second signal input end resistor R2, the second signal forward output end capacitor C2 and the second signal reverse output end resistor R22 are electrically connected to each other, and the other ends are electrically connected to the signal input end CIN, the signal forward output end COUT1 and the signal reverse output end COUT2 through a switch controlled by the selection switch circuit 6; the first signal input resistor R1 and the second signal input resistor R2 have different resistances, the first signal forward output capacitor C1 and the second signal forward output capacitor C2 have different capacitances, and the first signal reverse output resistor R11 and the second signal reverse output resistor R22 have different resistances. Through select switch circuit 6 with the resistance-capacitance element (first resistance-capacitance element or second resistance-capacitance element) of selection difference, can make the increase of break-make cycle multiple or reduce under the condition of the frequency division output that does not change 14 grades of frequency division devices, with this, make the technical scheme of the utility model can accord with "bury ground steel pipeline cathodic protection parameter measurement method" GB/T21246 and should accord with the requirement of 4/1s and 12/3s two kinds of standards about the break-make cycle of test stake polarization test piece. In addition, the selection switch circuit 6 further includes two selection indicator lamps 14 of different colors disposed on the housing 10, and the selection indicator lamps 14 may be light emitting diodes. When the selection switch circuit 6 selects the first resistance-capacitance 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 selection indicator lamp 14 is turned on; when the selection switch circuit 6 selects the second rc element to be electrically connected to the signal input terminal CIN, the signal forward output terminal COUT1 and the signal reverse output terminal COUT2 of the on-off control unit, the corresponding other selection indicator lamp 14 is turned on, so that the operator can be prompted conveniently how many cycles of the on-off potential measurement are currently used.
The utility model discloses in, this first switching device 4 can be the diode, and this second switching device 5 can be the triode. The reset signal input terminal circuit is a circuit formed by connecting a positive terminal of a power supply to a reset signal input terminal RST of the on-off control unit 3 through a diode. The first output end Q14 and the second output end Q10 are electrically connected to the cathodes of the two diodes respectively through a line, the anodes of the two diodes are electrically connected to the anode of the diode on the reset signal input end circuit through a line, and the cathode of the diode on the reset signal input end circuit is electrically connected to the reset signal input end RST through a line. The first output terminal Q14 is electrically connected to the base of the triode through a circuit, the collector of the triode is electrically connected to the on-off switch unit 2, and the emitter of the triode is grounded. And the on-off switching unit 2 may be a relay.
The utility model discloses in, this portable auxiliary measuring device still can include: a light-emitting presentation unit; as shown in fig. 1, the light emission prompting unit includes: a light emitting portion 15 and a comparator (not shown) electrically connected to each other; the light emitting part 15 is disposed on the housing 10, and the comparator is electrically connected to the first output terminal; when the comparator determines that the signal output of the first output terminal is at a low level, the light emitting part 15 is turned on, so that the operator can be prompted to switch on/off the state of the measurement of the electric potential by turning on or off the light emitting part. 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, and therefore a prompting means can be additionally added to prompt an operator to switch on or off the state of the 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 light-emitting prompting unit and the buzzer so as to provide a 12V direct current voltage source for the components or circuits, and the use convenience of the portable auxiliary measuring device can be improved by the arrangement of the battery.
In summary, the portable auxiliary measuring device of the technical scheme replaces manual power on/off periodic control with periodic control of the power on/off control unit on signal output, so that accurate periodic power on/off of the potential measuring loop of the polarization test piece of the testing pile of the pipeline with the cathodic protection is realized, the accuracy of the power on/off potential measuring data of the polarization test piece of the testing pile is greatly improved, and data guarantee is provided for accurately knowing the corrosion condition of the pipeline with the cathodic protection.
Above only be the preferred embodiment of the utility model discloses a not be used for injecing the utility model discloses a patent range, other applications the utility model discloses an equivalent change that the patent design was done all should belong to the patent protection scope of the utility model.
Claims (10)
1. A portable auxiliary measuring device for measuring the on-off potential of cathodic protection of a pipeline, which is used for periodically switching on and off a potential measuring loop of a polarization test piece of a test pile of the pipeline with cathodic protection, and is characterized by comprising: the meter pen on-off control 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 electricity end of the universal meter, and the meter pen at the positive electricity end of the universal meter is connected with a reference electrode which is positioned in soil and 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 a reset signal input end circuit of the on-off control unit through a first switch device, and the signal output end of the on-off control unit is also electrically connected with the on-off switch unit through a second switch device; the on-off period selection unit controls the signal output of the signal output end of the on-off control unit by selecting different control signals for the signal control end, and further controls the reset period of the on-off control unit and the closing period of the on-off switch unit.
2. The portable auxiliary measuring device for pipeline cathodic protection on-off potential measurement as recited in claim 1, wherein the on-off control unit is a 14-level frequency divider with model number 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 electrically connected with a reset signal input end circuit of the on-off control unit through a first switch device, and the first output end is also electrically connected with the on-off switch unit through a second switch 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.
3. The portable auxiliary measuring device for measuring the on-off potential of the cathodic protection of the pipeline as set forth in claim 2, further comprising: a light-emitting presentation unit; the light-emitting prompt unit includes: a light emitting section 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 in a low level, the light-emitting part is lightened.
4. The portable auxiliary measuring device for measuring the cathodic protection on-off potential of the pipeline as defined in claim 3, further comprising: a buzzer; the buzzer is electrically connected with the comparator; and 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 measuring the cathodic protection on-off potential of the pipeline as defined in 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 light-emitting prompting unit and the buzzer so as to provide power.
6. The portable auxiliary measuring device for measuring the on-off potential of the pipeline cathodic protection according to claim 2, wherein the on-off period selection unit is a selection switch circuit and has 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.
7. The portable auxiliary measuring device for measuring the on-off potential of the cathodic protection of the pipeline as defined in claim 6, wherein said first resistance-capacitance element is composed of a first signal input terminal resistance, a first signal forward output terminal capacitance and a first signal reverse output terminal resistance, and one end of said first signal input terminal resistance, said first signal forward output terminal capacitance and said first signal reverse output terminal resistance are electrically connected to each other, and the other end is electrically connected to said signal input terminal, said signal forward output terminal and said signal reverse output terminal through a switch controlled by said selection switch circuit; the second resistance-capacitance 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 a switch controlled by the selection switch circuit; and the resistance values of the first signal input end resistor and the second signal input end resistor are different, the capacitance values of the first signal forward output end capacitor and the second signal forward output end capacitor are different, and the resistance values of the first signal reverse output end resistor and the second signal reverse output end resistor are different.
8. The portable auxiliary measuring device for pipeline cathodic protection on-off potential measurement as recited in claim 6, wherein the selection switch circuit further comprises two selection indicator lights disposed on the 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 turned on; 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 turned on.
9. The portable auxiliary measuring device for pipeline cathodic protection on-off potential measurement as recited in claim 2 wherein 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 electrically connected with the cathodes of the two diodes through circuits, the anodes of the two diodes are electrically connected with the anode of the diode on the reset signal input end circuit through the circuits, and the cathode of the diode on the reset signal input end circuit is electrically connected with the reset signal input end through the circuits; the first output end is electrically connected with a base electrode of the triode through a circuit, a collector electrode of the triode is electrically connected with the on-off switch unit, and an emitting electrode of the triode is grounded.
10. The portable auxiliary measuring device for measuring the cathodic protection on-off potential of a pipeline according to claim 1, wherein the on-off switch unit is a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021927876.8U CN212316247U (en) | 2020-09-07 | 2020-09-07 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021927876.8U CN212316247U (en) | 2020-09-07 | 2020-09-07 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
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| Publication Number | Publication Date |
|---|---|
| CN212316247U true CN212316247U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021927876.8U Expired - Fee Related CN212316247U (en) | 2020-09-07 | 2020-09-07 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150322A (en) * | 2020-09-07 | 2022-03-08 | 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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2020
- 2020-09-07 CN CN202021927876.8U patent/CN212316247U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150322A (en) * | 2020-09-07 | 2022-03-08 | 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 |
| CN114150322B (en) * | 2020-09-07 | 2024-03-08 | 中国石油化工股份有限公司 | Portable auxiliary measuring device for measuring on-off electric potential of pipeline cathodic protection |
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Granted publication date: 20210108 Termination date: 20210907 |