Distributed insulator testing method

Abstract

The invention relates to the technical field of insulator testing, and discloses a distributed insulator testing method, which comprises the following steps: S1, installing an insulator, installing the insulator on a distributed detection table, and enabling leads at two ends to extend out of the detection table; and S2, visual detection: observing the appearance of the insulator through naked eyes. The distributed insulator testing method has the advantages of good detection effect and the like, and solves the problems that the existing insulator detection mostly depends on an insulator detector for direct detection, and whether the insulator is qualified or not is judged by observing whether the appearance of the insulator is damaged or not by naked eyes in the detection process; however, the method cannot detect the internal dark damage of the insulator shell, cannot detect whether the content gas of the insulator leaks slowly, is poor in detection effect, and cannot detect the completely qualified insulator product well. And potential safety hazards are easily generated in the subsequent use process due to internal hidden injuries and leakage of content gas.

Description

Technical Field

[0001] The present invention relates to the technical field of insulator testing, and specifically provides a distributed insulator testing method. Background Art

[0002] An insulator is a device installed between conductors at different potentials or between a conductor and a grounding member, which can withstand voltage and mechanical stress. There are many types of insulators with different shapes. Although the structures and appearances of different types of insulators vary greatly, they are all composed of two major parts: an insulating part and a connecting fitting.

[0003] Most of the existing insulator detections still rely on direct detection by an insulator detector, and during the detection process, the appearance of the insulator is observed by the naked eye to determine whether the insulator is qualified. However, the above methods cannot detect hidden damages inside the insulator housing, nor can they detect whether there is a slow leakage of the internal gas of the insulator. The detection effect is poor, and it cannot detect completely qualified insulator products well. The hidden damages and gas leakage inside it are extremely likely to cause safety hazards during subsequent use. Therefore, a distributed insulator testing method is proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the present invention provides a distributed insulator testing method, which has the advantages of good detection effect, etc., and solves the problems that most of the existing insulator detections still rely on direct detection by an insulator detector, and during the detection process, the appearance of the insulator is observed by the naked eye to determine whether the insulator is qualified. However, the above methods cannot detect hidden damages inside the insulator housing, nor can they detect whether there is a slow leakage of the internal gas of the insulator. The detection effect is poor, and it cannot detect completely qualified insulator products well. The hidden damages and gas leakage inside it are extremely likely to cause safety hazards during subsequent use.

[0006] (2) Technical Solutions

[0007] The technical solution of the present invention to solve the above technical problems is as follows: A distributed insulator testing method includes the following steps:

[0008] S1: Install the insulator, install the insulator on the distributed detection table, and extend the leads at both ends out of the detection table;

[0009] S2: Visual inspection, observe the appearance of the insulator by the naked eye to detect whether there are obvious damages, dirt, etc., preliminarily screen for faults and potential hazards of the insulator, and screen out damaged insulators;

[0010] S3: Turn on the power supply, connect the detection clips of the power supply to the leads at both ends of each insulator, and detect the firmness of the lead clamping to avoid loose or short-circuited connections.

[0011] S4: Equipment detection. Use an insulator live detector to apply an alternating current signal of a certain frequency to the insulator, measure the equivalent capacitance value and resistance value of the insulator, so as to detect the insulation performance of the insulator and screen out unqualified products with poor insulation performance.

[0012] S5: Thermal imaging scan. When the insulator is powered on, use a thermal imaging scanner to perform a thermal imaging scan, obtain the temperature distribution on the surface of the insulator through the thermal imaging scanner, and screen out insulators with local temperature anomalies.

[0013] S6: Acoustic wave detection. Remove the detected insulator and place it in an acoustic wave detector. Detect the interior of the insulator through the laws of ultrasonic wave reflection and propagation, and screen out problems such as possible leakage of internal content gas and loosening of the insulator end.

[0014] The beneficial effects of the present invention are:

[0015] This distributed insulator testing method has the advantage of good detection effect.

[0016] On the basis of the above technical solutions, the present invention can be further improved as follows.

[0017] Further, for the distributed detection table, the installation positions of adjacent two insulators are not less than 5 cm.

[0018] The beneficial effect of adopting the above further solution is that the installation positions of adjacent two insulators are not less than 5 cm, which can avoid generating electric arcs during the power-on process, thus avoiding high-voltage breakdown of the insulators caused by the electric arcs, and avoiding damage to qualified insulators during the detection process.

[0019] Further, in the visual inspection, the insulator should be observed repeatedly during the inspection, and the insulator should be rotated 360 degrees for observation during the observation process.

[0020] The beneficial effect of adopting the above further solution is that the 360-degree rotation observation and repeated observation can reduce omissions during the observation process, timely screen out damaged and unqualified products, and avoid secondary detection of insulators that are already known to be damaged.

[0021] Further, in the power-on process, there should be a spacing of at least 3 cm between adjacent two detection clips, and the ends of the detection clips should be covered with rubber insulating sleeves.

[0022] The beneficial effect of adopting the above further solution is that the insulating sleeve can protect the insulator from being discharged by the static electricity generated when the inspector uses the detection clip.

[0023] Further, the insulator live detector is the HVD-DZ11 insulator resistance tester. When performing live detection, the operator needs to keep both hands away from the distributed detection table.

[0024] The beneficial effect of adopting the above further solution is that the HVD-DZ11 insulator resistance tester has the advantages of digital display, accurate, stable, intuitive measurement and small volume.

[0025] Further, during the thermal imaging scan, the insulator should be avoided from being directly irradiated by the temperature-bearing irradiation lamp, and during the acoustic wave detection, the distance between two adjacent insulators should not be less than 2 cm.

[0026] The beneficial effect of adopting the above further solution is that the distance between two adjacent insulators is not less than 2 cm, which can avoid heat transfer through the air between two adjacent insulators, resulting in uneven heating of the insulators and thus misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic flow chart of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the embodiment, given by Figure 1 A distributed insulator testing method, the present invention includes the following steps:

[0030] S1: Install the insulator, install the insulator on the distributed detection table, and extend the leads at both ends out of the detection table;

[0031] S2: Visual inspection, visually observe the appearance of the insulator through the naked eye, detect whether there are obvious damages, dirt, etc., preliminarily screen the faults and hidden dangers of the insulator, and screen out the damaged insulators;

[0032] S3: Connect the power supply, connect the detection clips of the power supply to the leads at both ends of each insulator, and detect the firmness of the lead clamping to avoid virtual connection and short circuit;

[0033] S4: Equipment detection, use the insulator live detector to apply an alternating current signal with a certain frequency to the insulator, measure the equivalent capacitance value and resistance value of the insulator, so as to detect the insulation performance of the insulator, and screen out the unqualified products with unqualified insulation performance;

[0034] S5: Thermal imaging scan. When the insulator is powered on, use a thermal imaging scanner to perform a thermal imaging scan, obtain the temperature distribution on the surface of the insulator through the thermal imaging scanner, and screen out the insulators with local temperature anomalies;

[0035] S6: Acoustic wave detection. Remove the insulator that has completed the detection and place it in an acoustic wave detector. Detect the internal flaw of the insulator through the ultrasonic reflection and propagation laws, and screen out problems such as possible leakage of internal content gas and looseness of the insulator end;

[0036] Distributed detection table. The installation positions of two adjacent insulators are not less than 5 cm;

[0037] The installation positions of two adjacent insulators are not less than 5 cm, which can avoid generating electric arcs during the power-on process, thus avoiding high-voltage breakdown of the insulators by the electric arcs, and avoiding damage to qualified insulators during the detection process;

[0038] During visual inspection, the insulator should be observed repeatedly during the inspection, and the insulator should be flipped 360 degrees during the observation process;

[0039] 360-degree flipping observation and repeated observation can reduce omissions during the observation process, timely screen out damaged unqualified products, and avoid secondary detection of insulators that are already known to be damaged;

[0040] During power-on, there should be a spacing of at least 3 cm between two adjacent detection clips, and the ends of the detection clips should be covered with rubber insulation sleeves;

[0041] The insulation sleeve can protect the insulator from the static electricity generated by the operator when using the detection clip;

[0042] The insulator live detector is the HVD-DZ11 insulator resistance tester. During live detection, the operator needs to keep both hands away from the distributed detection table;

[0043] The HVD-DZ11 insulator resistance tester has the advantages of digital display, accurate measurement, stability, intuitiveness, and small volume;

[0044] During thermal imaging scan, avoid direct irradiation of the insulator by a temperature-bearing irradiation lamp, and during acoustic wave detection, the spacing between two adjacent insulators is not less than 2 cm;

[0045] The spacing between two adjacent insulators is not less than 2 cm, which can avoid heat transfer through the air between two adjacent insulators, causing uneven heating of the insulators and resulting in misjudgment.

[0046] Working principle:

[0047] Step 1: Install the insulator on the distributed detection platform. While installing, visually inspect the insulator 360 degrees by flipping it repeatedly to check for obvious damage, fouling, etc., and reject the insulators with such problems. Install the insulators that pass the visual inspection.

[0048] Step 2: Connect the two lead wires of the insulator to the insulator live detector through the detection clamp, and activate the insulator live detector to apply an alternating current signal of a certain frequency to the insulator, and measure the equivalent capacitance value and resistance value of the insulator. While using the insulator live detector, use a thermal imaging scanner to scan the surface of the insulator. Mark the insulators with uneven surface heat dissipation. After power-off, reject the insulators with unqualified insulation performance and the insulators with uneven heat generation.

[0049] Step 3: Separate the insulator from the distributed detection platform, place the insulators into the tray at an interval of 2 cm, and push them into the acoustic detector to detect hidden damages and whether the internal gas leaks through ultrasonic waves, and reject the insulators with such conditions. The remaining ones are qualified insulators.

[0050] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0051] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distributed insulator testing method, characterized in that: The steps include: S1: Install the insulator on the distributed test bench and extend the leads at both ends out of the test bench; S2: Visual inspection: observe the appearance of the insulator with the naked eye to check whether there is obvious damage, dirt, etc., preliminarily screen the faults and hidden dangers of the insulator, and screen out damaged insulators; S3: Turn on the power supply, connect the detection clamp of the power supply to the leads at both ends of each insulator, and check the clamping firmness of the leads to avoid false connection and short circuit; S4: Equipment testing: Use an insulator live detector to apply an AC signal of a certain frequency to the insulator, measure the equivalent capacitance and resistance of the insulator, and thus test the insulation performance of the insulator and screen out products with unqualified insulation performance; S5: Thermal imaging scanning: When the insulator is energized, a thermal imaging scanner is used to perform thermal imaging scanning. The temperature distribution on the surface of the insulator is obtained through the thermal imaging scanner, and insulators with local temperature anomalies are screened out; S6: Acoustic wave detection: remove the insulator after detection and place it in the acoustic wave detector. The internal part of the insulator is inspected through the reflection and propagation law of ultrasonic waves, and the possible gas leakage inside the insulator and looseness of the insulator end are screened.

2. A distributed insulator testing method according to claim 1, characterized in that: For the distributed detection platform, the installation position of two adjacent insulators is not less than 5CM.

3. A distributed insulator testing method according to claim 1, characterized in that: During the visual inspection, the insulator should be observed repeatedly, and during the observation process, the insulator should be turned over 360 degrees for observation.

4. A distributed insulator testing method according to claim 1, characterized in that: When the power is turned on, the distance between two adjacent detection clips should be at least 3CM, and the ends of the detection clips should be covered with rubber insulating sleeves.

5. A distributed insulator testing method according to claim 1, characterized in that: The insulator live detection instrument is an HVD-DZ11 insulator resistance tester. When performing live detection, the operator needs to keep both hands off the distributed detection platform.

6. A distributed insulator testing method according to claim 1, characterized in that: During the thermal imaging scan, the temperature-bearing lamp should not be directly irradiated on the insulator, and during the acoustic wave detection, the distance between two adjacent insulators should not be less than 2CM.

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