CN103344704A - Detection method for defects of pillar insulator - Google Patents
Detection method for defects of pillar insulator Download PDFInfo
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- CN103344704A CN103344704A CN2013102461135A CN201310246113A CN103344704A CN 103344704 A CN103344704 A CN 103344704A CN 2013102461135 A CN2013102461135 A CN 2013102461135A CN 201310246113 A CN201310246113 A CN 201310246113A CN 103344704 A CN103344704 A CN 103344704A
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Abstract
The invention discloses a detection method for defects of a pillar insulator. The detection method comprises the following steps of A. exciting a to-be-detected pillar insulator by using a sound wave with a frequency ranging from 1,000 Hz to 10,000 Hz, detecting amplitudes of forced vibration generated under excitation of corresponding frequency sound waves of the to-be-detected pillar insulator, the frequency corresponding to the maximum amplitude being an inherent frequency of the to-be-detected pillar insulator; B. determining whether defects exist in the pillar insulator or not; and C. repeating the step A for the to-be-detected pillar insulator possibly with the defects. The detection method can carry out defect detections on the pillar insulator accurately, and at the same time, can replace the pillar insulator with the defects and a completely damaged trend, thereby increasing the reliability of the detection method and preventing security risks.
Description
Technical field
The present invention relates to power domain, be specifically related to a kind of support insulator defect inspection method.
Background technology
Pillar porcelain insulator plays a part to support transmission line of electricity, disconnector and insulation, and whether in good condition it is, and the safety to grid equipment and operations staff has significant impact.Pillar porcelain insulator is bearing the effect that strong wind, sleet, the temperature difference and isolating switch switch equal stress during operation, and the mechanical damage when there is tiny flaw in insulator inside or installs just may develop into fracture accident.In recent years, operating support insulator fracture accident repeatedly takes place, and operation of power networks and personal security have been caused serious harm.
Therefore, carry out the insulator defects detection, to security and the stability of raising equipment and operation of power networks, support equipment and personnel's safety is significant.But owing to insulator out-of-shape, toughness deficiency and flaw size reason such as less often, traditional telescope ocular estimate usually is difficult to prove effective with direct mechanics measuring method.In recent years, power department and manufacturing firm to the insulator defect detecting technique, have carried out big quantity research, have obtained certain achievement.
Existing insulator defect inspection method has following several:
1. ultrasonic Detection Method, this method is used comparatively extensive, by hyperacoustic propagation characteristic, detects whether there is defective in the insulator.In case there is defective in insulator, ultrasound wave enters or when passing insulator, will anti-, refraction and mode conversion take place at fault location, by the ultrasound wave that receives being handled and being judged, can detect inferior insulator.But because insulator shape and structure and material behavior are comparatively complicated, and ultrasound wave exists coupling and the problem that decays, and the testing result that causes this method to obtain is unsatisfactory.
2. the infrared imaging method by detecting the thermal effect of support insulator, judges whether insulator exists defective.But this method is affected by environment bigger, and for the defective of many support insulators, its thermal effect is also not obvious.
3. the ultraviolet imagery method is surveyed discharge position by detecting ultraviolet signal, and then detects the defective of insulator.This method can be carried out preliminary direct location to the insulator surface defective by the ultraviolet imagery of observation point of discharge.But this method is difficult to the scope internal discharge, and the restriction of factors such as its imaging effect is subjected to that salt is close, air humidity, observed range and other atmospheric conditions, and it is usually not ideal enough to detect effect.This method checkout equipment cost is also higher in addition.
In addition, above-mentioned several detection method all is not suitable for charged detection.
Except above-mentioned several detection modes, application number is that the patent of invention of " 200910073406.1 " also discloses " a kind of detection method of the support insulator crackle based on vibroacoustics ".This method encourages insulator to be measured with the sound wave of spectral range at 1000 ~ 10000Hz, and detects the natural frequency of insulator forced vibration.According to the natural frequency of insulator, calculate the ultimate load of tested insulator, thereby judge the damage status of support insulator.This patent of invention disclosed method has overcome the deficiency of above-mentioned 3 kinds of detection methods, possesses certain superiority.
But, the formula of the ultimate load of the tested insulator of calculating that provides in this patent of invention:
P
1?/P
0=?（W
1/?W
0）
2；
P
0Expression is the ultimate load of damaged insulator not;
P
1The ultimate load of representing damaged insulator;
W
0Expression is the natural frequency of damaged insulator not;
W
1The natural frequency of representing damaged insulator.
This formula can only illustrate between the natural frequency of the ultimate load of insulator and insulator to have theoretic the contact, but in the middle of practical application, can not judge the loss situation of insulator by this formula.Work as W
1W
0The time, according to this formula, even the ultimate load that damaged insulator can occur is greater than the situation of the ultimate load of damaged insulator not.
In addition, this patent of invention also discloses a kind ofly judges that insulator is in the standard of faulty condition, be that the reduction of insulator load-bearing capacity then must be scrapped for 2.5 ~ 25 times, show as the maximal value that occurs several intensity comparable measures in following frequency range in the insulator natural frequency: 1000 ~ 3000Hz occurs for the first time, and 4000 ~ 5000Hz occurs for the second time; A maximal value appears at 1000 ~ 2000Hz; 4000 ~ 5000Hz occurs for the first time, and 8000 ~ 10000Hz occurs for the second time.
The inventor finds, the insulator load-bearing capacity reduces and is that breakage meeting crackle inner by insulator or that show brings, and crackle and damaged from growing to developing into the degree of influence safety, during time unpredictable at all, all possible from the several seconds to the several years.If this disclosure of the Invention applies in the middle of the actual detected, the situation that may cause the time period inner insulator between twice detection to rupture or damage because of crackle and damaged generation, that is to say, the insulator load-bearing capacity reduces below 2.5 times, still have potential safety hazard, the reliability of this invention is not high.
In addition, the inventor also finds, if when the natural frequency of insulator appears at 3000 ~ 4000Hz, 5000 ~ 8000Hz, this invention does not provide corresponding solution and determination methods.
Summary of the invention
Purpose of the present invention namely is to overcome in the existing sonic detection support insulator defective technology, the reliability that exists is not high, can't carry out the problem of effective defects detection to the insulator that natural frequency appears at 3000 ~ 4000Hz, 5000 ~ 8000Hz, a kind of support insulator defect inspection method is provided.
Purpose of the present invention is achieved through the following technical solutions:
The support insulator defect inspection method may further comprise the steps:
A. use frequency range at the sound wave of 1000 ~ 10000Hz tested support insulator to be encouraged, detect tested support insulator produces forced vibration under the excitation of respective frequencies sound wave amplitude, frequency when amplitude peak occurring in 3000Hz ~ 8000Hz scope is the natural frequency of tested support insulator, and the amplitude peak that occurs in 1000Hz ~ 3000Hz or 8000Hz ~ 10000Hz scope is the additional frequency of tested support insulator;
B. judge whether support insulator exists defective:
As additional frequency appears, then there is defective in tested support insulator, and the tested support insulator that has defective is changed;
As 4000Hz＜natural frequency＜5000HZ, then there is not defective in tested support insulator;
As 3000Hz≤natural frequency≤4000Hz or 5000Hz≤natural frequency≤8000HzHz, then may there be defective in tested support insulator;
C. the tested support insulator that may have defective is repeated to implement the A step, as the natural frequency that obtains reduces gradually, then there is defective in this tested support insulator, and this tested support insulator is changed.
When additional frequency occurring, the natural frequency of tested support insulator can be suppressed, even disappears.
The inventor arrives through study and cognition, the reduction of insulator load-bearing capacity is that breakage meeting crackle inner by insulator or that show brings, and crackle and damaged from growing to developing into the degree of influence safety, during time unpredictable at all, all possible from the several seconds to the several years.Judging iff the amount that reduces according to the insulator load-bearing capacity whether exhausted pillar edge should be scrapped, is safe inadequately.Because crackle and damaged development have uncontrollable and unpredictable property.Therefore, for the support insulator that detects defective, no matter how many its load-bearing capacitys reduces, and all exists to be developed to the trend of damaging fully, should change for this support insulator with defective.
The inventor recognizes also that through research along with crackle and the damaged development of support insulator, the load-bearing capacity of support insulator reduces gradually, and the natural frequency of support insulator can descend gradually.For the support insulator that can't judge whether to exist defective, it is carried out repeated detection, as the natural frequency that obtains reduces gradually, then this support insulator inside exists crackle or breakage, and in continuous development.
Further, in the described steps A, adopt the excitation pinger to described support insulator emission sound wave to be measured, adopt the piezoelectric type acceleration sensor to detect support insulator to be measured produces forced vibration under the excitation of respective frequencies sound wave amplitude.
Further, in the described steps A, the time interval between each sound wave is
Further, among the described step C, the time interval of at every turn implementing described A step is half a year or 1 year.
Further, described tested support insulator is made of two single support insulator series connection.
Further, described tested support insulator is made of three single support insulator series connection.
Now, the transformer station of 110KV, employing be single support insulator.And the transformer station of 220KV adopts two single support insulator series connection to use, and the transformer station of 500KV adopts three single support insulator series connection to use.Current, the mode that does not adopt sonic detection in this area is carried out defects detection to the support insulator of two or three series connection, does not also have document openly to adopt the mode of sonic detection the support insulator of two or three series connection to be carried out the method for defects detection.Tracing it to its cause, is because those skilled in the art do not recognize, when with sound wave the support insulator of connecting being encouraged, two or three support insulators exist as a whole, and the characteristic of its natural frequency is consistent with single support insulator.
In sum, advantage of the present invention and beneficial effect are:
1. for existing defective and the support insulator with trend of damaging fully to change, improve reliability of the present invention, stopped potential safety hazard;
2. the support insulator to 3000Hz≤natural frequency≤4000Hz or 5000Hz≤natural frequency≤8000HzHz carries out duplicate detection, can determine whether its inside exists defective, thereby realize the complete detection of support insulator;
3. the support insulator to series connection detects, and usable range is wide.
Description of drawings
In order to be illustrated more clearly in embodiments of the invention, will make simple explanation to the required accompanying drawing of using in the description embodiment of the invention below.Apparent, the accompanying drawing in describing below only is some embodiment that put down in writing among the present invention, to those skilled in the art, under the situation of not paying creative work, can also obtain other accompanying drawing according to following accompanying drawing.
Fig. 1 is the spectrogram of #1 support insulator;
Fig. 2 is the spectrogram of #2 support insulator;
Spectrogram when there is crackle in Fig. 3 for #3 support insulator lower flange;
Spectrogram when there is crackle in Fig. 4 for #3 support insulator upper flange;
Fig. 5 is the spectrogram of #101 when intact;
Fig. 6 is the spectrogram of #102 when intact;
Fig. 7 is the spectrogram of #103 when intact;
Fig. 8 is the spectrogram of #104 when intact;
Fig. 9 is the spectrogram after the #101 hammering for the first time;
Figure 10 is the spectrogram after the #102 hammering for the first time;
Figure 11 is the spectrogram after the #103 hammering for the first time;
Figure 12 is the spectrogram after the #104 hammering for the first time;
Figure 13 is the spectrogram after the #101 hammering for the second time;
Figure 14 is the spectrogram after the #102 hammering for the second time;
Figure 15 is the spectrogram after the #103 hammering for the second time;
Figure 16 is the spectrogram after the #104 hammering for the second time;
Figure 17 is the spectrogram after the #101 hammering for the third time;
Figure 18 is the spectrogram after the #102 hammering for the third time;
Figure 19 is the spectrogram after the #103 hammering for the third time;
Figure 20 is the spectrogram after the #104 hammering for the third time.
Embodiment
In order to make those skilled in the art understand the present invention better, below in conjunction with the accompanying drawing in the embodiment of the invention technical scheme in the embodiment of the invention is carried out clear, complete description.Apparent, embodiment described below only is the part in the embodiment of the invention, rather than all.Based on the embodiment of the present invention's record, other all embodiment that those skilled in the art obtain under the situation of not paying creative work are all in the scope of protection of the invention.
Embodiment 1:
Choose 3 support insulators (the Nanjing electroceramics XZP2-300KN of factory type), be numbered #1, #2, #3 respectively, wherein possess macroscopic crackle on the lower flange of #3 support insulator.Adopt CTS-9008 type porcelain insulator ultra-sonic defect detector (Shantou Ultrasonic Electronic Co., Ltd., Guangdong) that 3 support insulators are checked the wound, determine that #1 support insulator and #2 support insulator are intact, determine that there is defective in the #3 support insulator.
Select for use homemade SCT-1 porcelain strut insulator detection record instrument (System Engineering Corporation far away of Tianjin section) that 3 support insulators are detected.Excitation pinger on the SCT-1 and piezoelectric type acceleration sensor are pressed on the lower flange bottom of support insulator, start SCT-1, the excitation pinger encourages support insulator with the sound wave of frequency range at 1000 ~ 10000Hz, the piezoelectric type acceleration sensor detects support insulator and produce the amplitude of forced vibration under the excitation of respective frequencies sound wave, SCT-1 stores amplitude signal, and generates frequency spectrum.Fig. 1 and Fig. 2 are respectively the spectrogram of #1 support insulator and #2 support insulator.Among Fig. 1 and Fig. 2, amplitude peak appears in 4000 ~ 5000Hz scope, that is to say that the natural frequency of #1 support insulator and #2 support insulator in 4000 ~ 5000Hz scope, do not carry additional frequency secretly, #1 support insulator and #2 support insulator are intact, do not have defective.Spectrogram when there is crackle in Fig. 3 for #3 support insulator lower flange, among the figure, amplitude peak appears in 1000 ~ 2000Hz scope, has additional frequency, has defective on the #3 support insulator.
Turn the #3 support insulator, make the crackle of #3 support insulator move to the top, and with said method the #3 support insulator is detected.Spectrogram when there is crackle in Fig. 4 for #3 support insulator upper flange, among the figure, amplitude peak appears in 9000 ~ 10000Hz scope, has additional frequency, has defective on the #3 support insulator.
By present embodiment as can be seen, it is consistent with the defect situation of predefined 3 insulators to detect the result who obtains by the present invention.
Embodiment 2:
Choose 5 through UT (Ultrasonic Testing), determine intact sunken support insulator (Nanjing electroceramics XZP2-300KN type).5 support insulators are numbered #4, #5, #6, #7, #8 respectively.On the lower flange of 5 support insulators, the long crackle of 2cm is set manually.Adopt the method for record among the embodiment 1 then, with Russian MN-1 registering instrument and homemade SCT-1 5 support insulators are detected.Testing result is as shown in table 1.
As can be seen from Table 1, by existing method, not knowing that in advance 5 support insulators have manually arranged under the situation of crackle, can determine that there is defective in the support insulator of numbering #4, #5, #6, and can't judge for the support insulator of numbering #7, #8 whether it exists defective.
Manually the crackle on 5 support insulator lower flange is increased to 3cm, then it is carried out the first time and detect.Manually the crackle on 5 support insulator lower flange is increased to 4cm, then it is carried out the second time and detect.Manually the crackle on 5 support insulator lower flange is increased to 5cm, then it is detected for the third time.Manually the crackle on 5 support insulator lower flange is increased to 6cm, then it is carried out the 4th time and detect.Above-mentioned detection all is the methods that adopt record among the embodiment 1, with SCT-1 5 support insulators is detected.Testing result is as shown in table 2.
By table 2 as can be seen, along with the increase of crackle, the amplitude peak frequency of 5 support insulators reduces gradually, and the amplitude peak frequency of 5 insulators reduces gradually.
Therefore, for the support insulator that may have defective, can judge that there is defective in it by the reduction gradually of its natural frequency.
Embodiment 3:
Choose 1 through UT (Ultrasonic Testing), determine intact sunken support insulator (Nanjing electroceramics XZP2-300KN type).Flange in the bottom to this support insulator is numbered #101, #102, #103 and #104 respectively for four jiaos, adopts the method described in the embodiment 1 that flange in the bottom is detected for four jiaos, the record spectrogram.Then this support insulator is carried out three times and knock, knock the back at every turn flange in the bottom is detected, the record spectrogram.Testing result is as shown in table 3.Spectrogram such as Fig. 5 ~ shown in Figure 20.
By table 3 as can be seen, along with the increase of hammer number, the insulator underbead crack increases, and insulator strength descends, and simultaneously, the amplitude peak frequency obviously descends.
Because the restriction of existing equipment accuracy of detection for intact support insulator, adopts the present invention to detect, detecting the natural frequency that obtains might be between 3000 ~ 4000Hz or 5000 ~ 8000Hz; Have the support insulator of fine crack for inside, adopt the present invention to detect, detecting the natural frequency that obtains might be between 3000 ~ 4000Hz or 5000 ~ 8000Hz.
By present embodiment as can be seen, for this support insulator that can't judge whether to exist defective, can judge whether inside exists defective by the reduction gradually of its natural frequency.
It should be noted that still, the continuity that its natural frequency can not occur reduces because the influence of external environmental factor for intact support insulator, detects the result who obtains and has difference at every turn.
Embodiment 4:
Choose two through UT (Ultrasonic Testing), confirm intact support insulator (the Nanjing electroceramics XZP2-300KN of factory type), respectively it is numbered #12 and #13.Two support insulators are detected separately, and the natural frequency that obtains the #12 support insulator is 4556Hz, and the natural frequency of #13 support insulator is 4461Hz.Then, with #12, the series connection of #13 support insulator, the support insulator to series connection detects again, and obtaining its natural frequency is 4512Hz.
Take off the #13 support insulator, the long crackle of 4cm manually is set on its flange in the bottom.Detect from its bottom, obtaining its additional frequency is 1576Hz.Turn the #13 support insulator, make crackle be positioned at the top, detect from its bottom, obtaining its additional frequency is 9332Hz.
The top flange of #13 support insulator is connected with the flange in the bottom of #12 support insulator, finishes series connection.Detect from the flange in the bottom of #13 support insulator, obtaining its additional frequency is 1332Hz.Turn this series connection support insulator, detect from the top flange of #12 support insulator, obtaining its additional frequency is 9765Hz.
The flange in the bottom of #13 support insulator is connected with the flange in the bottom of #12 support insulator, finishes series connection.Detect from the top flange of #13 support insulator, obtaining its additional frequency is 1812Hz.Turn this series connection support insulator, detect from the top flange of #12 support insulator, obtaining its additional frequency is 1760Hz.
Choose again once UT (Ultrasonic Testing), confirm intact support insulator, it is numbered #14.The flange in the bottom of #14 support insulator is connected with the top flange of #12, the top flange of #13 support insulator is connected with the flange in the bottom of #12 support insulator.Detect from the flange in the bottom of #13 support insulator, obtaining its additional frequency is 1543Hz.Turn this series connection support insulator, detect from the top flange of #14 support insulator, obtaining its additional frequency is 9243Hz.
Above-mentioned detection all is the methods that adopt record among the embodiment 1, with SCT-1 5 support insulators is detected.
From present embodiment as can be seen, the characteristic of the support insulator frequency of series connection is consistent with single support insulator.The detection of the support insulator that can connect by the present invention.
Embodiment 5:
Select for use 6 support insulators (numbering is respectively #A, #B, #C, #D, #E, #F) on the 110KV of the SCT-1 transformer station disconnecting link to detect, it is as follows to detect step:
A. the excitation pinger on the SCT-1 and piezoelectric type acceleration sensor are pressed on the lower flange bottom of support insulator, start SCT-1, the excitation pinger encourages support insulator with the sound wave of frequency range at 1000 ~ 10000Hz, the piezoelectric type acceleration sensor detects support insulator and produce the amplitude of forced vibration under the excitation of respective frequencies sound wave, SCT-1 stores amplitude signal, and generates frequency spectrum.Testing result is as shown in table 4.
B. judge whether support insulator exists defective:
There is not defective in the natural frequency of #A, #B, #C support insulator between 4000Hz ~ 5000Hz.
There is defective in the additional frequency of #E support insulator between 1000Hz ~ 3000Hz, it is changed.
There is defective in the additional frequency of #F support insulator between 8000Hz ~ 10000Hz, it is changed.
May there be defective in the natural frequency of #D support insulator between 3000Hz ~ 4000Hz.
C. the #D support insulator that may have defective is repeated to implement the A step, each half a year interval time, testing result is as shown in table 5.
The natural frequency of #D support insulator reduces gradually, and there is defective in the #D support insulator, and the #D support insulator is changed.
Checking:
Outage is carried out UT (Ultrasonic Testing) to 6 support insulators, found that there are not defective in #A, #B, #C support insulator, and there are defective in #E, #F support insulator, and there is defective in the #D support insulator.
Embodiment 6:
Select for use 6 the series connection support insulators (numbering is respectively #G, #H, #I, #J, #K, #L) on the 220KV of the SCT-1 transformer station disconnecting link to detect, it is as follows to detect step:
A. the excitation pinger on the SCT-1 and piezoelectric type acceleration sensor are pressed on the lower flange bottom of support insulator, start SCT-1, the excitation pinger encourages support insulator with the sound wave of frequency range at 1000 ~ 10000Hz, the piezoelectric type acceleration sensor detects support insulator and produce the amplitude of forced vibration under the excitation of respective frequencies sound wave, SCT-1 records this amplitude, and generates frequency spectrum.Testing result is as shown in table 6.
B. judge whether support insulator exists defective:
There is not defective in the natural frequency of #G, #I, #K support insulator between 4000Hz ~ 5000Hz.
There is defective in the additional frequency of #H support insulator between 1000Hz ~ 3000Hz, it is changed.
There is defective in the additional frequency of #L support insulator between 8000Hz ~ 10000Hz, it is changed.
May there be defective in the natural frequency of #J support insulator between 6000Hz ~ 8000Hz.
C. the #J support insulator that may have defective is repeated to implement the A step, each 1 year interval time, testing result is as shown in table 7.
Downward trend does not gradually appear in the natural frequency of #J support insulator, and there is not defective in the #J support insulator.
Checking:
Outage is carried out UT (Ultrasonic Testing) to 6 support insulators, found that there are not defective in #G, #I, #K support insulator, and there are defective in #H, #L support insulator, and there is not defective in the #J support insulator.
Embodiment 7:
Select for use 6 the series connection support insulators (numbering is respectively #M, #N, #O, #P, #Q, #R) on the 500KV of the SCT-1 transformer station disconnecting link to detect, it is as follows to detect step:
A. the excitation pinger on the SCT-1 and piezoelectric type acceleration sensor are pressed on the lower flange bottom of support insulator, start SCT-1, the excitation pinger encourages support insulator with the sound wave of frequency range at 1000 ~ 10000Hz, the piezoelectric type acceleration sensor detects support insulator and produce the amplitude of forced vibration under the excitation of respective frequencies sound wave, and SCT-1 records this amplitude, and generates frequency spectrum.Testing result is as shown in table 8.
B. judge whether support insulator exists defective:
There is not defective in the natural frequency of #M, #N support insulator between 4000Hz ~ 5000Hz.
There is defective in the additional frequency of #O, #R support insulator between 1000Hz ~ 3000Hz, it is changed.
There is defective in the additional frequency of #P support insulator between 8000Hz ~ 10000Hz, it is changed.
May there be defective in the natural frequency of #Q support insulator between 6000Hz ~ 8000Hz.
C. the #Q support insulator that may have defective is repeated to implement the A step, each half a year interval time, testing result is as shown in table 9.
The natural frequency of #Q support insulator reduces gradually, and there is defective in the #Q support insulator, and the #Q support insulator is changed.
Checking:
Outage is carried out UT (Ultrasonic Testing) to 6 support insulators, found that there are not defective in #M, #N support insulator, and there are defective in #O, #P, #R support insulator, and there is defective in the #Q support insulator.
By embodiment 5 ~ embodiment 7 as can be seen, by implementing the present invention, can carry out defects detection to support insulator exactly.To existing defective and the support insulator with trend of damaging fully to change, improve reliability of the present invention simultaneously, stopped potential safety hazard.
Need to prove, among all embodiment, all adopt Russian MN-1 registering instrument and homemade SCT-1 to detect, only is to implement the function of wanting required for the present invention because above-mentioned two kinds of equipment can provide.Can launch sound wave for other, the instrument of detected amplitude also can be used in the present invention.When reading the application, can not be interpreted as that the present invention can only adopt above-mentioned two kinds of equipment to realize.
UT (Ultrasonic Testing) is prior art well known to those skilled in the art.Though its method of operating and principle of work are not described among the application, those skilled in the art can be according to existing techniques in realizing.
What those skilled in the art will appreciate that is that many variations and the structure that can further selectively use above a plurality of exemplary embodiments descriptions form other possible embodiment of the present invention.Consider those skilled in the art's ability, this paper does not provide in detail or describes the possible repeated content of institute, but all combinations that otherwise comprise and possibility embodiment are the application's a part.
Claims (5)
1. the support insulator defect inspection method is characterized in that, may further comprise the steps:
A. use frequency range at the sound wave of 1000 ~ 10000Hz tested support insulator to be encouraged, detect tested support insulator produces forced vibration under the excitation of respective frequencies sound wave amplitude, frequency when amplitude peak occurring in 3000Hz ~ 8000Hz scope is the natural frequency of tested support insulator, and the amplitude peak that occurs in 1000Hz ~ 3000Hz or 8000Hz ~ 10000Hz scope is the additional frequency of tested support insulator;
B. judge whether support insulator exists defective:
As additional frequency appears, then there is defective in tested support insulator, and the tested support insulator that has defective is changed;
As 4000Hz＜natural frequency＜5000HZ, then there is not defective in tested support insulator;
As 3000Hz≤natural frequency≤4000Hz or 5000Hz≤natural frequency≤8000HzHz, then may there be defective in tested support insulator;
C. the tested support insulator that may have defective is repeated to implement the A step, as the natural frequency that obtains reduces gradually, then there is defective in this tested support insulator, and this tested support insulator is changed.
2. support insulator defect inspection method according to claim 1, it is characterized in that: in the described steps A, adopt the excitation pinger to described support insulator emission sound wave to be measured, adopt the piezoelectric type acceleration sensor to detect support insulator to be measured produces forced vibration under the excitation of respective frequencies sound wave amplitude.
3. support insulator defect inspection method according to claim 1, it is characterized in that: among the described step C, the time interval of at every turn implementing described A step is half a year or 1 year.
4. according to any described support insulator defect inspection method in the claim 1 ~ 3, it is characterized in that: described tested support insulator is made of two single support insulator series connection.
5. according to any described support insulator defect inspection method in the claim 1 ~ 3, it is characterized in that: described tested support insulator is made of three single support insulator series connection.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005043223A (en) * | 2003-07-22 | 2005-02-17 | Sankyo Eng Kk | Method for inspecting joint section and method of constructing the same |
| CN101907607A (en) * | 2010-07-15 | 2010-12-08 | 天津市科远***工程有限公司 | Method for detecting defect of porcelain strut insulator |
| CN102095802A (en) * | 2009-12-14 | 2011-06-15 | 黑龙江省电力科学研究院 | Method for detecting post insulator cracks based on vibration acoustics |
| CN202433345U (en) * | 2011-12-28 | 2012-09-12 | 宁夏电力公司电力科学研究院 | Portable online porcelain pillar insulator detector |
| JP2013029343A (en) * | 2011-07-27 | 2013-02-07 | Toin Gakuen | Detection method using sound wave, non-contact sound detection system, program used for the system, and record medium recording the program |
-
2013
- 2013-06-20 CN CN2013102461135A patent/CN103344704A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005043223A (en) * | 2003-07-22 | 2005-02-17 | Sankyo Eng Kk | Method for inspecting joint section and method of constructing the same |
| CN102095802A (en) * | 2009-12-14 | 2011-06-15 | 黑龙江省电力科学研究院 | Method for detecting post insulator cracks based on vibration acoustics |
| CN101907607A (en) * | 2010-07-15 | 2010-12-08 | 天津市科远***工程有限公司 | Method for detecting defect of porcelain strut insulator |
| JP2013029343A (en) * | 2011-07-27 | 2013-02-07 | Toin Gakuen | Detection method using sound wave, non-contact sound detection system, program used for the system, and record medium recording the program |
| CN202433345U (en) * | 2011-12-28 | 2012-09-12 | 宁夏电力公司电力科学研究院 | Portable online porcelain pillar insulator detector |
Non-Patent Citations (2)
| Title |
|---|
| 焦敬品等: "基于随机振动响应谐振频率偏移的绝缘子无损检测方法", 《无损检测》 * |
| 马崇等: "振动声学法在瓷支柱绝缘子检测中的应用", 《河北电力技术》 * |
Cited By (14)
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| CN104597132A (en) * | 2014-11-07 | 2015-05-06 | 国家电网公司 | Resonant acoustics-based porcelain support insulator hot-line detection method |
| CN104897776A (en) * | 2015-06-16 | 2015-09-09 | 国网山东省电力公司聊城供电公司 | Vibration acoustic wave based charged flaw detection device and method for porcelain post insulator |
| CN106248799A (en) * | 2016-08-27 | 2016-12-21 | 国网江苏省电力公司盐城供电公司 | A kind of method using vibratory drilling method detection column support type porcelain bottle insulators damage |
| CN106290577A (en) * | 2016-08-27 | 2017-01-04 | 国网江苏省电力公司盐城供电公司 | A kind of porcelain strut insulator detecting system based on vibratory drilling method and method |
| US10585415B2 (en) | 2016-11-28 | 2020-03-10 | Fanuc Corporation | Portable operation panel having vibrating function and vibration-detecting function |
| CN108120496A (en) * | 2016-11-28 | 2018-06-05 | 发那科株式会社 | Portable operation panel |
| CN108120496B (en) * | 2016-11-28 | 2020-10-16 | 发那科株式会社 | Movable operating panel |
| CN111160315A (en) * | 2020-01-03 | 2020-05-15 | 云南电网有限责任公司电力科学研究院 | Method and device for acquiring inherent frequency band of post insulator |
| CN111160315B (en) * | 2020-01-03 | 2023-05-05 | 云南电网有限责任公司电力科学研究院 | Method and device for acquiring intrinsic frequency band of post insulator |
| WO2022105556A1 (en) * | 2020-11-23 | 2022-05-27 | 太景科技(南京)有限公司 | Insulator detection apparatus, detection method, and insulator |
| CN114236327A (en) * | 2021-11-29 | 2022-03-25 | 国网福建省电力有限公司检修分公司 | Detection device and detection method for composite insulator core rod rotting defect |
| CN114236327B (en) * | 2021-11-29 | 2024-05-31 | 国网福建省电力有限公司检修分公司 | Detection device and detection method for core rod decay defect of composite insulator |
| CN114965694A (en) * | 2022-05-25 | 2022-08-30 | 国家电网有限公司 | Porcelain insulator defect detection method based on ultrasonic signal |
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