CN111796159A - Method for detecting whether composite type drainage device is damaged or not on site - Google Patents
Method for detecting whether composite type drainage device is damaged or not on site Download PDFInfo
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- CN111796159A CN111796159A CN202010697093.3A CN202010697093A CN111796159A CN 111796159 A CN111796159 A CN 111796159A CN 202010697093 A CN202010697093 A CN 202010697093A CN 111796159 A CN111796159 A CN 111796159A
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- drainage device
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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
Abstract
The invention belongs to the technical field of drainage device detection, and particularly relates to a method for detecting whether a composite drainage device is damaged or not on site, which comprises the following steps: a. preparing equipment: an electrical drainage detector capable of measuring resistance and voltage; b. transforming a connecting line of the test pile; c. the power-on switch is disconnected; d. detecting whether the composite type drainer detection device is damaged or not; e. and after the detection is finished, closing the power-on switch, taking down the drainage device detection device, and restoring to the original state. According to the invention, at the position of the testing pile of the buried pipeline, the pipeline testing wire is connected with the positive electrode of the composite type drainage device through the on-off switch, so that whether the composite type drainage device can normally work or other faults can be judged within 1 minute, the composite type drainage device with the faults can be conveniently replaced or maintained in time, compared with the method that the composite type drainage device is transported back to a laboratory for detection after being detached from the site, the cost is greatly saved, and the method is high in accuracy, fast and efficient, can be operated by non-professional personnel, and is simple and feasible.
Description
Technical Field
The invention belongs to the technical field of drainage device detection, and particularly relates to a method for detecting whether a composite drainage device is damaged or not on site.
Background
With the development of economy and the rapid increase of energy requirements, high-voltage alternating-current and direct-current power transmission circuits are criss-cross nationwide, and strong power is injected for economic development. The high-speed railway and subway lines of various cities bring convenience to people's trip and promote economic development. But on the other hand, stray current interference is also brought to buried metal pipelines, reinforced concrete foundations and other metal structures. Metal structures that are subject to stray current interference are subject to stray current corrosion. Under the condition of stray current interference, the buried metal pipeline is easy to corrode and perforate at the damaged part of an anticorrosive coating, particularly an oil-gas pipeline, and the consequences caused by corrosion and perforation are serious, so that not only is great economic loss caused, but also casualties can be caused. Therefore, the pipelines suffering from the interference of the stray current must take protective measures, and the drainage device is a key measure for the drainage protection of the buried oil and gas pipelines. The buried pipeline not only causes the interference of direct current stray current, but also has alternating current stray current, and the composite type current drainage device can be used for occasions where the buried pipeline is interfered by alternating current and direct current stray current. The composite type drain used on site has the defect that the internal circuit of the drain is damaged due to factors such as moisture, large current or lightning stroke, and the like, so that the composite type drain cannot play a due role, and therefore, a detection method suitable for being used on site must be selected, the performance of the drain can be detected simply, conveniently, quickly and reliably, and whether the drain can work normally or not is judged.
In order to confirm whether the composite type drainage device of the buried pipeline can normally work or not, the composite type drainage device is checked in a laboratory or before being manufactured and delivered from a factory, the checking method generally comprises a direct current volt-ampere characteristic test and an alternating current volt-ampere characteristic test, a special instrument is adopted in the laboratory for checking, but the site does not have the condition of the laboratory, therefore, in order to ensure the safety of the pipeline, a detection device for checking whether the composite type drainage device normally works or not is selected, the detection device is very important for site work, the damaged drainage device is found in time, and replacement or maintenance is carried out.
The method for detecting the performance of the drainage device in the laboratory is an alternating current and direct current volt-ampere characteristic test, and the performance of the drainage device can be accurately detected under the laboratory condition. The detection parameters comprise alternating current impedance, direct current voltage threshold value, leakage current and the like of the composite type drainage device, but the condition of a laboratory is not available on the site, the site drainage device is taken back for laboratory detection, the cost for detection after the site drainage device is excavated is high, the consumed period is long, most pipeline operators are not equipped with the laboratory and must detect the drainage device through a third party, and therefore, the drainage device is not practical to be sent to the laboratory for daily inspection. Whether the composite drain is damaged or not is checked by using the drain detection device, and the device is simple and easy to operate, high in accuracy, convenient to operate and convenient for non-professional personnel to operate and check.
In 2017, 3.3, corrosion and protection, a method for comparing service performance of an alternating current drainer and a field effect are disclosed, and the performance of the drainer is judged through laboratory direct current volt-ampere characteristic test and alternating current volt-ampere characteristic test, long-time field potential data recording and data analysis. Except for laboratory tests, the method needs to collect potential data on site and judge the effect before and after drainage, needs to perform professional analysis on a computer, is long in time consumption, and is difficult for general workers in field inspection to perform the work, and needs to be trained by professional technicians.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a method for detecting whether a composite type drainage device is damaged on site, the method has the advantages of simple detection equipment, convenient use and high accuracy, and even if a non-professional person passes through the detection method, the non-professional person can judge whether the composite type drainage device is damaged within 1 minute.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for in situ testing of damage to a composite drain, comprising the steps of:
a. preparing equipment: an electric current drainage detector 5 capable of measuring resistance and voltage;
b. the connecting line of the test pile is reformed as follows:
connecting a positive terminal of the electric drainage device detection device 5 with a positive wire 3 of an electric drainage device of the composite electric drainage device 9 through a first terminal A of the test pile terminal board 2;
arranging an on-off switch 1, and connecting a first connecting terminal A with a second connecting terminal B of a testing pile wiring board 2 connected with a pipeline testing wire 4 of a pipeline 8 through the on-off switch 1;
connecting a negative terminal of the drainage detector 5 with a negative wire 6 of a drainage of the composite drainage 9 through a third terminal E of the test pile terminal plate 2; the third connecting terminal E is connected with a fourth connecting terminal F of the drainage ground bed wire 7 of the drainage ground bed 10 and the testing pile wiring board 2 through a copper connecting sheet;
c. the power-on switch 1 is turned off;
d. detecting whether the composite type drainer 9 is damaged or not;
adjusting the gear of the drainage detector 5 to a Test gear, and when a display screen of the drainage detector 5 is Good, indicating that the composite drainage 9 is normal, and Failure, indicating that the composite drainage 9 is damaged;
e. and after the detection is finished, closing the power-on switch 1, taking down the drainage device detection device 5 and restoring to the original state.
The detection method further comprises the following self-checking of the drain detection device 5 before step d: the gear of the drainage device detection device 5 is adjusted from OFF to ON, when the display screen of the drainage device detection device 5 is Normal, the internal circuit of the device is Normal, the electric quantity is Normal, the system is Normal, and Wrong appears, so that the system is low in electric quantity or the system is in failure.
In the step d, the gear of the electric drainage device detection device 5 is adjusted to the Test gear, firstly, an internal circuit of the device is short-circuited to detect the resistance of an external circuit, and then, a diode of the external circuit is detected by measuring voltage, wherein the external circuit is the electric drainage device 9.
When the internal circuit is short-circuited, the external resistance value is gradually increased from a very small value to several hundred ohms; and the voltage value is gradually increased from 0.0001; and within 20 seconds, when the resistance value and the voltage value are sequentially increased and changed, the composite type drainage device 9 is judged to normally work, and the display screen of the drainage device detection device 5 displays Good.
When the internal circuit is short-circuited, the resistance of the external circuit is infinite, and the voltage is infinitely reduced; and within 20 seconds, when the resistance value and the voltage value are both infinite, judging that the composite type drainage device 9 is damaged, and displaying Failure on a display screen of the drainage device detection device 5.
When the internal circuit is short-circuited, the external resistance value is a small value, generally between 0.1 and 0.5 ohm, and is stable and unchanged, and the voltage drop is a small value, generally between 0.0001 and 0.0003V; and in 20 seconds, when the resistance value and the voltage value are both small, the composite type drainage device 9 is judged to be damaged, and the display screen of the drainage device detection device 5 displays Failure.
The drain detection device 5 is a digital multimeter having a display module.
In the step d, the measured voltage is a measured voltage-time curve.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, at the position of a testing pile of the buried pipeline, a pipeline testing wire and the positive electrode of the composite type drainage device are connected through the on-off switch, a connecting wire is connected as required, whether the composite type drainage device can work normally or is damaged or not can be judged within 1 minute, the composite type drainage device with the fault can be replaced or maintained in time, and compared with the condition that the composite type drainage device is transported back to a laboratory for detection after being detached from the site, the cost is greatly saved, and the detection device is high in accuracy, fast and efficient, can be operated by non-professionals, and is simple and feasible.
Drawings
Fig. 1 is a schematic wiring diagram of a detection method for inspecting whether a composite type drainage device is damaged or not in the field.
Wherein the reference numerals are:
1 on-off switch
2 testing pile wiring board
3 positive electrode wire of electric drainage device
4 pipeline test line
5 electric drainage device detection device
6 negative pole wire of electric drainage device
7 drainage ground bed line
8 pipeline
9 electric drainage device
10 drainage ground bed
Wiring terminal of A-F test pile wiring board
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example 1
Referring to fig. 1, a method for detecting whether a composite type drainage device is damaged in situ includes the following steps:
a. preparing equipment: an electric drainage detector;
b. the method comprises the following steps of modifying a connecting line of the test pile: connecting a positive terminal of a current drainage device detection device 5 with a positive wire 3 of a current drainage device of a composite current drainage device 9 through a first terminal A of a testing pile terminal board 2, connecting a pipeline test 4 of a pipeline 8 with a second terminal B of the testing pile terminal board 2, connecting the first terminal A with the second terminal B through an on-off switch 1, and connecting a negative terminal of the current drainage device detection device 5 with a negative wire 6 of the composite current drainage device 9 through a third terminal E of the testing pile terminal board 2; the drainage ground bed wire 7 of the drainage ground bed 10 is connected with a fourth wiring terminal F of the testing pile wiring board 2, and the third wiring terminal E is connected with the fourth wiring terminal E through a copper connecting sheet.
c. The power-on switch 1 is turned off;
d. whether the drainage device detection device 5 is normal is detected, and the specific steps are as follows: adjusting the gear of the drainage device detection device 5 from OFF to ON, observing a display screen of the drainage device detection device 5, and when the display screen of the drainage device detection device 5 is Normal, an internal circuit of the device is Normal, the electric quantity is Normal, the system is Normal, and Wrong is generated, the system electric quantity is low or the system is in failure;
e. whether the composite type drainage device 9 is damaged or not is detected, and the specific steps are as follows: adjusting the gear of the drain detection device 5 to a Test gear, observing a display screen of the drain detection device 5, and when the display screen of the drain detection device 5 is Good, indicating that the composite drain 9 is normal, and Failure, indicating that the composite drain 9 is damaged;
the position of the drain detecting device 5 is adjusted to the Test position, and the internal circuit of the device firstly detects the resistance of the external circuit and secondly detects the diode of the external circuit:
1. when the internal circuit is short-circuited, the external resistance value is gradually increased from a very small value to several hundred ohms; and the voltage display number is gradually increased from 0.0001; within 20 seconds, when the numerical values are sequentially increased and changed, the composite type drainage device 9 is judged to normally work, and a display screen of the drainage device detection device 5 displays Good;
2. when the internal circuit is short-circuited, the resistance of the external circuit is infinite, and the voltage is infinitely reduced; within 20 seconds, when the numerical values are infinite, the composite type drainage device 9 is judged to be damaged, and the display screen of the drainage device detection device 5 displays Failure;
3. when the internal circuit is short-circuited, the external resistance value is a small value, generally between 0.1 and 0.5 ohm, and is stable and unchanged, and the voltage drop is a small value, generally between 0.0001 and 0.0003V; and within 20 seconds, when the numerical values are all smaller, judging that the composite type drainage device 9 is damaged, and displaying Failure on a display screen of the drainage device detection device 5.
f. After the detection is finished, closing the power-on switch 1; and (5) taking down the drainage device detection device 5 and restoring the device.
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 person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A method for in situ testing of damage to a composite drain, comprising the steps of:
a. preparing equipment: an electric drainage detector (5) capable of measuring resistance and voltage;
b. the connecting line of the test pile is reformed as follows:
connecting a positive terminal of the drainage device detection device (5) with a positive wire (3) of a drainage device of the composite drainage device (9) through a first terminal (A) of the test pile terminal board (2);
arranging an on-off switch (1), and connecting a first connecting terminal (A) with a second connecting terminal (B) of a testing pile connecting plate (2) connected with a pipeline testing wire 4 of a pipeline 8 through the on-off switch (1);
connecting a negative terminal of the drainage device detection device (5) with a negative terminal (6) of a drainage device of the composite drainage device (9) through a third terminal (E) of the test pile terminal block (2); the third connecting terminal (E) is connected with a drainage ground bed wire (7) of the drainage ground bed (10) and a fourth connecting terminal (F) of the testing pile wiring board (2) through a copper connecting sheet;
c. the power-on switch (1) is turned off;
d. detecting whether the composite type drainer (9) is damaged or not;
adjusting the gear of the drainage device detection device (5) to a Test gear, and when a display screen of the drainage device detection device (5) is Good, indicating that the composite drainage device (9) is normal, and when Failure occurs, indicating that the composite drainage device (9) is damaged;
e. and after the detection is finished, closing the power-on switch (1), taking down the drainage device detection device (5) and restoring to the original state.
2. A method for the field testing of composite type electric drainage device according to claim 1, characterized in that the testing method further comprises the following self-tests of the testing electric drainage device (5) before step d: and (3) adjusting the gear of the drainage device detection device (5) from OFF to ON, wherein when a display screen of the drainage device detection device (5) has Normal, an internal circuit of the device is Normal, the electric quantity is Normal, the system is Normal, and Wrong appears, the system is low in electric quantity or the system is in failure.
3. A method for the field testing of damage to a composite electric drain according to claim 1, characterized in that in the step d, the step of the electric drain testing device (5) is adjusted to Test, the internal circuit of the device is first short-circuited to Test the resistance of the external circuit, and then the diode of the external circuit is tested by measuring the voltage, and the external circuit is the electric drain (9).
4. A method for inspecting in situ damage to a composite type electric drainage device according to claim 3, wherein the external resistance value is gradually increased from a very small value to several hundred ohms in sequence when the internal circuit is short-circuited; and the voltage value is gradually increased from 0.0001; and within 20 seconds, when the resistance value and the voltage value are sequentially increased and changed, the composite type drainage device (9) is judged to normally work, and the display screen of the drainage device detection device (5) displays Good.
5. The method for inspecting in-situ whether the composite type electric drainage device is damaged or not according to claim 3, wherein when the internal circuit is short-circuited, the resistance of the external circuit is infinite and the voltage drop is infinite; and within 20 seconds, when the resistance value and the voltage value are infinite, judging that the composite type drainage device (9) is damaged, and displaying Failure on a display screen of the drainage device detection device (5).
6. A method for the in-situ detection of damage to a composite electric drain as claimed in claim 3, wherein the external resistance value is a small value, typically between 0.1-0.5 ohms, and is stable and constant, and the voltage drop is a small value, typically between 0.0001-0.0003V, when the internal circuit is shorted; and in 20 seconds, when the resistance value and the voltage value are both small, the composite type drainage device (9) is judged to be damaged, and the display screen of the drainage device detection device (5) displays Failure.
7. A method for the field detection of damage to a composite drain according to claim 1, characterized in that the drain detection device (5) is a digital multimeter having a display module.
8. The method for inspecting in situ whether the composite type electric drainage device is damaged or not according to claim 3, wherein in the step d, the measured voltage is a measured voltage-time curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010697093.3A CN111796159A (en) | 2020-07-20 | 2020-07-20 | Method for detecting whether composite type drainage device is damaged or not on site |
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| CN202010697093.3A CN111796159A (en) | 2020-07-20 | 2020-07-20 | Method for detecting whether composite type drainage device is damaged or not on site |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113866545A (en) * | 2021-09-30 | 2021-12-31 | 北京安科腐蚀技术有限公司 | Method for monitoring running performance of fluid drainage device |
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