CN113866545A - Method for monitoring running performance of fluid drainage device - Google Patents
Method for monitoring running performance of fluid drainage device Download PDFInfo
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- CN113866545A CN113866545A CN202111158925.5A CN202111158925A CN113866545A CN 113866545 A CN113866545 A CN 113866545A CN 202111158925 A CN202111158925 A CN 202111158925A CN 113866545 A CN113866545 A CN 113866545A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 title description 3
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 12
- 238000010586 diagram Methods 0.000 claims description 10
- 238000012417 linear regression Methods 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
Abstract
The invention provides a method for monitoring the running performance of a drainer, which comprises the following steps: connecting a pipeline, a drainage device and a drainage ground bed in sequence to form a drainage loop, connecting an on-off switch in series in the drainage loop, correspondingly forming a passage and an open circuit of the drainage loop by controlling the on-off switch to be closed and opened, and introducing a reference electrode into the drainage loop; when the on-off switch is in a closed state, acquiring the pipeline potential at the side of the drainage pipeline and the drainage ground bed potential at the side of the drainage ground bed of the drainage device; subtracting the potential of the drainage ground bed from the potential of the pipeline to obtain the ground voltage of the pipeline; comparing the tube ground voltage with a conduction voltage threshold of the drainer, and judging whether the tube ground voltage is within the conduction voltage threshold; if so, judging that the direct current discharging function of the drainer is normal; if not, the drainage device is judged to be damaged. The invention can monitor the running state of the drainage device in real time and all-around manner, and can find drainage abnormity in time, thereby not only saving labor and cost, but also greatly improving the monitoring quality and efficiency of the drainage device.
Description
Technical Field
The invention relates to the technical field of drainage monitoring, in particular to a method for monitoring the running performance of a drainage device.
Background
The drainage device has the function of removing current, and can guide stray current on the pipeline (or a metal structure) to the drainage device and flow into the ground or flow back to an interference source through the drainage ground bed, so that the stray current is prevented from directly flowing into soil from the pipeline to cause electrochemical corrosion. However, in the actual industrial production process, the maintenance period of the drainer is usually about 6 months, and during this period, the running condition of the equipment cannot be timely obtained or the drainage effect cannot be timely evaluated, and the possible risks cannot be monitored and early warned. Once the drainer fails or the external cable breaks, it will have a significant impact on the cathodic protection of the pipe. If the drainer with the fault cannot be found in time, the pipeline can be seriously corroded, the pipeline is monitored on site only by manpower, the input manpower and material resources are large, the fault can be found only after a long time, and the hidden trouble of the fault cannot be eliminated in time.
Disclosure of Invention
The invention provides a method for monitoring the running performance of the drainage device, which can monitor the running performance of the drainage device in real time and can not find the abnormity of the drainage device in time.
In order to achieve the technical purpose, the invention discloses a method for monitoring the running performance of an electric drainage device, which is applied to an electric drainage system with the electric drainage device and comprises the following steps:
connecting a pipeline, a drainage device and a drainage ground bed in sequence to form a drainage loop, connecting an on-off switch in series in the drainage loop, correspondingly forming a passage and an open circuit of the drainage loop by controlling the on-off switch to be closed and opened, and introducing a reference electrode into the drainage loop;
when the on-off switch is in a closed state, acquiring the pipeline potential at the side of the drainage pipeline and the drainage ground bed potential at the side of the drainage ground bed of the drainage device;
subtracting the potential of the drainage ground bed from the potential of the pipeline to obtain the ground voltage of the pipeline;
comparing the tube ground voltage with a conduction voltage threshold of the drainer, and judging whether the tube ground voltage is within the conduction voltage threshold; if so, judging that the direct current discharging function of the drainer is normal; if not, the drainage device is judged to be damaged.
In one embodiment, the method further comprises:
when the on-off switch is in a closed state, acquiring the direct current of a passage discharged by the drainer when the direct current flows to the drainage ground bed from the pipeline;
acquiring pipeline potential and channel direct current for multiple times to obtain corresponding pipeline potential data and channel direct current data;
setting direct current data of a channel as an X axis, setting pipeline potential data as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain the impedance of the first loop;
judging whether the impedance of the first loop is within a range specified by a triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
In one embodiment, the method further comprises:
acquiring drainage ground bed potential and channel direct current for multiple times to obtain corresponding drainage ground bed potential data and channel direct current data;
setting the direct current data of a channel as an X axis, setting the electric potential data of the drainage ground bed as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain a second loop impedance;
judging whether the second loop impedance is within the range specified by the triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
In one embodiment, the method further comprises:
when the on-off switch is in a closed state, collecting a first channel alternating current voltage and a first channel alternating current which are discharged from a drainage bed side or a pipeline side of a drainage device;
acquiring the first channel alternating voltage and the first channel alternating current for multiple times to obtain corresponding first channel alternating voltage data and first channel alternating current data;
setting the AC data of the first channel as an X axis, setting the AC data of the first channel as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain the impedance of a third loop;
judging whether the third loop impedance is in a range specified by a triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
In one embodiment, the method further comprises:
when the on-off switch is in an off state, collecting the drainage ground bed open-circuit alternating current voltage of the drainage ground bed;
by the formula:
the drain communication capacity of the drain is calculated.
In one embodiment, the method further comprises:
when the on-off switch is in an off state, collecting the open-circuit potential of the drainage ground bed;
acquiring the open-circuit potential of the drainage ground bed for multiple times to obtain corresponding open-circuit potential data of the drainage ground bed;
drawing an open-circuit potential line graph of the drainage ground bed according to the sequence of acquisition time according to the open-circuit potential data of the drainage ground bed;
comparing the potential interval of the drainage ground bed open-circuit potential broken line diagram with a normal potential interval, and judging whether the potential interval of the drainage ground bed open-circuit potential broken line diagram is in the normal potential interval or not according to the metal electromotive force; if so, judging that the drainage ground bed works normally; if not, the drainage ground bed is judged to be invalid.
In one embodiment, the method further comprises:
embedding a test piece connected with the pipeline at the pipeline;
when the on-off switch is in a closed state, collecting second-path alternating voltage and second-path alternating current flowing through the row test piece;
by the formula:
and calculating the soil diffusion resistance.
In one embodiment, when the pipe ground voltage is not within the conduction voltage threshold range of the drain, drain damage warning information is generated;
and when the external working environment of the drainage device is judged to be changed, generating early warning information of the change of the external working environment of the drainage device.
In one embodiment, the drainage and communication capacity of the drainage device installed at different points of the pipeline is counted;
defining the drainage device with the alternating current discharge capacity of more than 99 percent as the drainage device with good drainage effect;
and dividing the number of the drainage devices with good drainage effect by the total number of the drainage devices connected to the pipeline to obtain the drainage protection rate of the pipeline.
In one embodiment, when the drainage ground bed is judged to be invalid, drainage ground bed failure early warning information is generated.
The invention has the beneficial effects that: the drainage system can monitor all the operation parameters of the drainage system in real time and all-around manner, and can monitor and find drainage abnormity in real time according to all the operation parameters, can evaluate the stability of the external working environment of the drainage device in all-around manner, timely evaluate the drainage capacity and drainage effect of the drainage device, can monitor the operation condition of the drainage ground bed in real time, saves labor and cost, and greatly improves the monitoring quality and efficiency of the drainage device.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for monitoring operation performance of an ejector according to an embodiment of the present invention;
fig. 2 is a diagram illustrating a voltage analysis of a pipe ground in the method for monitoring the operation performance of the electric drainage device according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an analysis of a first loop impedance in a method for monitoring an operation performance of an electric drainage device according to an embodiment of the present invention;
fig. 4 is a line diagram of loop impedance plotted in time sequence in the method for monitoring the operation performance of the fluid displacement device according to an embodiment of the present invention;
fig. 5 is a view showing a drainage ground bed open-circuit potential line graph plotted according to historical data of the drainage ground bed open-circuit potential in the method for monitoring the operation performance of the drain according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more obvious, the present invention is further described below with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Based on the shortcomings in the prior art, an embodiment of the present invention provides a specific implementation of a method for monitoring operation performance of an electric drainage device, which is applied to an electric drainage system with an electric drainage device, as shown in fig. 1, and the method specifically includes:
connecting a pipeline, a drainage device and a drainage ground bed in sequence to form a drainage loop, connecting an on-off switch in series in the drainage loop, correspondingly forming a passage and an open circuit of the drainage loop by controlling the on-off switch to be closed and opened, and introducing a reference electrode into the drainage loop;
specifically, the drainage device is connected in series between a pipeline buried underground and a drainage ground bed, stray current existing near the pipeline is introduced into the drainage device and is discharged into the ground through the drainage ground bed, and a reference potential is stabilized by using a reference electrode so as to provide a reference potential for the subsequent collection of the potential of the drainage ground bed and the potential of the pipeline; the on-off switch can be a time relay or a circuit breaker with a timing on-off function.
When the on-off switch is in a closed state, acquiring the pipeline potential at the side of the drainage pipeline and the drainage ground bed potential at the side of the drainage ground bed of the drainage device;
subtracting the potential of the drainage ground bed from the potential of the pipeline to obtain the ground voltage of the pipeline;
comparing the tube ground voltage with a conduction voltage threshold of the drainer, and judging whether the tube ground voltage is within the conduction voltage threshold; if so, judging that the direct current discharging function of the drainer is normal; if not, the drainage device is judged to be damaged.
As shown in fig. 1, the upper half of the diagram in fig. 1 represents the pipe potential, the middle represents the drainage ground bed potential, and the lower half represents the pipe ground voltage obtained by subtracting the drainage ground bed potential from the pipe potential. Normally, the drain has a function of isolating direct current from direct current, so that the ground voltage of the tube is in a conducting voltage threshold range, and the tube is in a conducting state above or below the conducting voltage threshold range. FIG. 1 shows that the turn-on voltage threshold is-0.5V-0.5V, as shown in FIG. 1, if the tube ground voltage is at the threshold, it indicates that the DC discharge function of the electric discharger is normal; if the pipe ground voltage is not within the threshold value range, the drainage straight function of the drainage device is lost, and the drainage device is damaged.
On the basis, when the pipe ground voltage is not in the range of the conduction voltage threshold of the drainer, generating drainer damage early warning information, timely prompting an engineer to check the running state of the drainer, and taking measures for replacing the drainer.
In the embodiment, the pipe ground voltage is obtained by monitoring the pipeline potential and the drain ground bed potential in real time, whether the drain is damaged or not is determined in time by judging the pipe ground voltage and comparing the pipe ground voltage with the actual conduction voltage threshold of the drain, and the early warning information of the damage of the drain is used for prompting in time. Therefore, operation and maintenance personnel or engineers can obtain the actual operation condition of the drainer in time, the manpower detection cost is reduced, and manpower and material resources are saved.
On the basis of the above embodiments, in the present embodiment, whether the external working environment of the drainage device changes can be determined in three ways. In the first mode, when the on-off switch is in a closed state, the direct current of a channel discharged by a drainer when flowing to a drainage ground bed from a pipeline is collected;
acquiring pipeline potential and channel direct current for multiple times to obtain corresponding pipeline potential data and channel direct current data;
setting direct current data of a channel as an X axis, setting pipeline potential data as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain the impedance of the first loop;
judging whether the impedance of the first loop is within the range specified by the triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
In the second mode, the corresponding drainage ground bed potential data and the corresponding access direct current data are obtained by collecting drainage ground bed potential and access direct current for multiple times;
setting the direct current data of a channel as an X axis, setting the electric potential data of the drainage ground bed as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain a second loop impedance;
judging whether the second loop impedance is within the range specified by the triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
In a third mode, when the on-off switch is in a closed state, collecting a first channel alternating current voltage and a first channel alternating current which are discharged from a drainage bed side or a pipeline side of the drainage device;
acquiring the first channel alternating voltage and the first channel alternating current for multiple times to obtain corresponding first channel alternating voltage data and first channel alternating current data;
setting the AC data of the first channel as an X axis, setting the AC data of the first channel as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain the impedance of a third loop;
judging whether the third loop impedance is in a range specified by a triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
The three ways are realized in the same principle, for example, in the first way, the loop impedance analysis graph shown in fig. 3 can be drawn according to the measured pipe potential data and the channel dc data, each data of the graph can form a straight line after linear fitting (the linear fitting method can adopt a least square method and other fitting methods to linearly fit the data), the absolute value of the slope of the straight line represents the first loop impedance, and the first loop impedance is normally maintained within a certain range, the first loop impedance shown in fig. 2 is maintained about 1.2 Ω (the second loop impedance or the third loop impedance is also maintained within a certain range after stable operation, and the two may not be the same as the first loop impedance in value), the triple standard deviation method uses and determines the first loop impedance, the second loop impedance and the third loop impedance, taking the first loop impedance as an example, the standard deviation and the average value of the first loop impedance corresponding to all the first loop impedance data measured within a certain time are firstly measured by a triple standard deviation method, and after a new first loop impedance is generated, whether the value of the new first loop impedance is within the range of +/-3 times of the standard deviation of the average value is judged. If the impedance of the first loop obtained by monitoring is within the range specified by the triple standard deviation method, the external working environment of the drainer is normal; if the impedance of the first loop obtained by monitoring is not within the range specified by the triple standard deviation law, the impedance of the first loop of the drainage device is obviously fluctuated, and further the external working environment of the drainage device at the position is greatly changed. The other two ways are similar to the first way, and are not described herein.
On the basis of the above embodiment, the acquired first loop impedance, second loop impedance and third loop impedance may be counted in units of days, and the loop impedance line graph shown in fig. 4 is drawn according to the data acquired every day according to the time sequence, so that all the loop impedances can be displayed more intuitively, and an engineer or operation and maintenance staff can more conveniently acquire whether the external working environment of the drainer is stable.
On the basis, when the external working environment of the drainage device is judged to be changed, the early warning information of the change of the external working environment of the drainage device is generated. And prompting an engineer to check the external working environment of the drainer in time, checking whether serious geological changes occur on the site and the like, and taking corresponding measures in time.
In this embodiment, the external working environment of the drain can be obtained in multiple aspects, so that the all-dimensional real-time monitoring of the external working environment of the drain is realized, the external working environment of the drain can be found at the first time when the external working environment is abnormal, a corresponding response can be rapidly made to the abnormality, and the further expansion of the generated damage is prevented.
On the basis of the above embodiment, in this embodiment, a test piece connected to a pipe is buried at the pipe;
when the on-off switch is in a closed state, collecting second-path alternating voltage and second-path alternating current flowing through the row test piece;
by the formula:
and calculating the soil diffusion resistance.
By the method, the soil diffusion resistance can be acquired in real time, the soil environment is determined, an engineer or operation and maintenance personnel can conveniently judge whether the installation quantity and the installation position of the drainage ground bed are suitable for the soil environment according to the acquired soil diffusion resistance, and then the drainage system arranged on the pipeline is further adaptively optimized along with the change of the soil environment, so that the drainage capacity of the drainage system is improved.
On the basis of the above embodiment, in this embodiment, when the on-off switch is in the off state, the drainage ground bed open-circuit alternating-current voltage of the drainage ground bed is collected;
by the formula:
the drain communication capacity of the drain is calculated.
The larger the calculated percentage of drainage capacity value is, the stronger the drainage capacity of the drainer is.
In actual industrial activities, drainage systems are arranged at different points along the pipeline burying direction,
counting the drainage and communication capacity of the drainage device arranged at different point positions of the pipeline;
defining the drainage device with the alternating current discharge capacity of more than 99 percent as the drainage device with good drainage effect;
and dividing the number of the drainage devices with good drainage effect by the total number of the drainage devices connected to the pipeline to obtain the drainage protection rate of the pipeline.
In this embodiment, the overall drainage performance of the corresponding drainage device of each pipeline can be mastered from a global perspective, so that the overall drainage performance of the drainage device can be evaluated, special treatment can be conveniently performed on the pipe section with poor drainage effect, and the purpose of improving the drainage effect of the whole pipeline is further achieved.
On the basis of the above embodiment, in this embodiment, when the on-off switch is in an off state, the open-circuit potential of the drainage ground bed is collected;
acquiring the open-circuit potential of the drainage ground bed for multiple times to obtain corresponding open-circuit potential data of the drainage ground bed;
drawing an open-circuit potential line graph of the drainage ground bed according to the sequence of acquisition time according to the open-circuit potential data of the drainage ground bed;
comparing the potential interval of the drainage ground bed open-circuit potential broken line diagram with a normal potential interval, and judging whether the potential interval of the drainage ground bed open-circuit potential broken line diagram is in the normal potential interval or not according to the metal electromotive force; if so, judging that the drainage ground bed works normally; if not, the drainage ground bed is judged to be invalid.
From the above, a line graph (curve fit) as shown in fig. 5 can be drawn, and from the metal emf, as illustrated in fig. 5 at-1.1V, when the drainage bed is at this value, it indicates that the drainage bed is able to protect the pipe and function properly as a drainage bed. And (3) drawing the continuous change of the open-circuit potential of the drainage ground bed into a line graph, wherein the measurement error can fluctuate within a certain range, and when the value is +/-50 Mv within a normal range, the drainage ground bed is considered to be normal, otherwise, the drainage ground bed is considered to be failed.
And when the drainage ground bed is judged to be invalid, generating drainage ground bed failure early warning information. And prompting an engineer to check the drainage ground bed in time, and checking whether the drainage ground bed on site fails or whether the connection is broken or not.
In this embodiment, the drainage ground bed can be monitored in real time through the drainage ground bed open-circuit potential data, and the quality of the drainage ground bed can be known in time. And can remind in time when drainage ground bed appears unusually. The damage is prevented from further expansion, and the condition that the pipeline is not protected in place is avoided.
In conclusion, the drainage system can monitor all the operation parameters of the drainage device in real time and all-directionally, monitor all the operation parameters in real time according to all the operation parameters, detect drainage abnormity in time, evaluate the stability of the external working environment of the drainage device in all directions, evaluate the drainage capacity and drainage effect of the drainage device in time, monitor the operation condition of the drainage ground bed in real time, save labor and cost, and greatly improve the monitoring quality and efficiency of the drainage device.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for monitoring the operation performance of an electric drainage device, which is applied to an electric drainage system with the electric drainage device, and is characterized in that the method comprises the following steps:
connecting a pipeline, a drainage device and a drainage ground bed in sequence to form a drainage loop, connecting an on-off switch in series in the drainage loop, correspondingly forming a passage and an open circuit of the drainage loop by controlling the on-off switch to be closed and opened, and introducing a reference electrode into the drainage loop;
when the on-off switch is in a closed state, acquiring the pipeline potential at the side of the drainage pipeline and the drainage ground bed potential at the side of the drainage ground bed of the drainage device;
subtracting the potential of the drainage ground bed from the potential of the pipeline to obtain the ground voltage of the pipeline;
comparing the tube ground voltage with a conduction voltage threshold of the drainer, and judging whether the tube ground voltage is within the conduction voltage threshold; if so, judging that the direct current discharging function of the drainer is normal; if not, the drainage device is judged to be damaged.
2. The method for monitoring the operational performance of an electric discharge machine as claimed in claim 1, further comprising:
when the on-off switch is in a closed state, acquiring the direct current of a passage discharged by the drainer when the direct current flows to the drainage ground bed from the pipeline;
acquiring pipeline potential and channel direct current for multiple times to obtain corresponding pipeline potential data and channel direct current data;
setting direct current data of a channel as an X axis, setting pipeline potential data as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain the impedance of the first loop;
judging whether the impedance of the first loop is within a range specified by a triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
3. A method of monitoring the operational performance of an electrical discharge machine, as claimed in claim 2, further comprising:
acquiring drainage ground bed potential and channel direct current for multiple times to obtain corresponding drainage ground bed potential data and channel direct current data;
setting the direct current data of a channel as an X axis, setting the electric potential data of the drainage ground bed as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain a second loop impedance;
judging whether the second loop impedance is within the range specified by the triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
4. A method of monitoring the operational performance of an electrical discharge machine as claimed in claim 1,
further comprising:
when the on-off switch is in a closed state, collecting a first channel alternating current voltage and a first channel alternating current which are discharged from a drainage bed side or a pipeline side of a drainage device;
acquiring the first channel alternating voltage and the first channel alternating current for multiple times to obtain corresponding first channel alternating voltage data and first channel alternating current data;
setting the AC data of the first channel as an X axis, setting the AC data of the first channel as a Y axis, drawing a straight line by a linear regression method, calculating the slope of the straight line and taking the absolute value of the slope to obtain the impedance of a third loop;
judging whether the third loop impedance is in a range specified by a triple standard deviation method;
if so, judging that the external working environment of the drainer is normal; if not, the external working environment of the drainer is judged to be changed.
5. The method for monitoring the operational performance of an electric discharge machine as claimed in claim 4, further comprising:
when the on-off switch is in an off state, collecting the drainage ground bed open-circuit alternating current voltage of the drainage ground bed;
by the formula:
the drain communication capacity of the drain is calculated.
6. The method for monitoring the operational performance of an electric discharge machine as claimed in claim 1, further comprising:
when the on-off switch is in an off state, collecting the open-circuit potential of the drainage ground bed;
acquiring the open-circuit potential of the drainage ground bed for multiple times to obtain corresponding open-circuit potential data of the drainage ground bed;
drawing an open-circuit potential line graph of the drainage ground bed according to the sequence of acquisition time according to the open-circuit potential data of the drainage ground bed;
comparing the potential interval of the drainage ground bed open-circuit potential broken line diagram with a normal potential interval, and judging whether the potential interval of the drainage ground bed open-circuit potential broken line diagram is in the normal potential interval or not according to the metal electromotive force;
if so, judging that the drainage ground bed works normally; if not, the drainage ground bed is judged to be invalid.
7. A method of monitoring the operational performance of an electrical discharge machine as claimed in claim 1,
further comprising:
embedding a test piece connected with the pipeline at the pipeline;
when the on-off switch is in a closed state, collecting second-path alternating voltage and second-path alternating current flowing through the row test piece;
by the formula:
and calculating the soil diffusion resistance.
8. A method of monitoring the operational performance of an electrical discharge machine as claimed in claim 2, 3 or 4,
when the pipe ground voltage is not in the range of the conduction voltage threshold of the drainer, generating drainer damage early warning information;
and when the external working environment of the drainage device is judged to be changed, generating early warning information of the change of the external working environment of the drainage device.
9. A method of monitoring the operational performance of an electrical discharge machine as claimed in claim 5,
counting the drainage and communication capacity of the drainage device arranged at different point positions of the pipeline;
defining the drainage device with the alternating current discharge capacity of more than 99 percent as the drainage device with good drainage effect;
and dividing the number of the drainage devices with good drainage effect by the total number of the drainage devices connected to the pipeline to obtain the drainage protection rate of the pipeline.
10. A method of monitoring the operational performance of an electrical discharge machine as claimed in claim 6,
and when the drainage ground bed is judged to be invalid, generating drainage ground bed failure early warning information.
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