CN205280505U - Benzvalene form insulator seal pressure nondestructive test device - Google Patents
Benzvalene form insulator seal pressure nondestructive test device Download PDFInfo
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- CN205280505U CN205280505U CN201520930538.2U CN201520930538U CN205280505U CN 205280505 U CN205280505 U CN 205280505U CN 201520930538 U CN201520930538 U CN 201520930538U CN 205280505 U CN205280505 U CN 205280505U
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- stress
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- form insulator
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- 239000012212 insulator Substances 0.000 title claims abstract description 69
- 238000012360 testing method Methods 0.000 title claims abstract description 54
- VMQPMGHYRISRHO-UHFFFAOYSA-N benzvalene Chemical group C1=CC2C3C1C32 VMQPMGHYRISRHO-UHFFFAOYSA-N 0.000 title abstract 7
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 18
- 239000012141 concentrate Substances 0.000 claims description 8
- 230000035882 stress Effects 0.000 description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000004364 calculation method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a benzvalene form insulator seal pressure nondestructive test device, greatest stress that the settlement position of the same model through acquireing same electric pressure or the benzvalene form insulator of different models can bear, carry out air pressure test to the benzvalene form insulator that awaits measuring, at the atmospheric pressure within range set for apply pressure progressively, at this in -process synchronous record atmospheric pressure value and the stress at the settlement position of benzvalene form insulator of awaiting measuring, linear match is carried out to the stress, the atmospheric pressure data that obtain, obtains the relation that stress changes along with atmospheric pressure, combines greatest stress finds the solution the biggest bearing pressure of the benzvalene form insulator that awaits measuring. The utility model discloses outstanding completion the utility model purpose, can not damage the benzvalene form insulator, the equipment that adopts moreover can be obtained by current air -tight test apparatus improved, the cost is lower.
Description
Technical field
The utility model relates to electrical insulating material technical field, particularly a kind of disc insulator voltage endurance capability lossless detection method and device.
Background technology
Along with electrical network voltage range develops to extra-high voltage direction, high-tension switch gear disc insulator size constantly increases, and in operational process, requirement to its voltage endurance capability is more and more higher. Large-scale insulation part complex manufacturing, the production cycle is long, and electrical and mechanical properties requires high. Under the combined action that disc insulator is in high-voltage electric field and complicated stress field for a long time in high-tension switch gear inside, the mechanical function such as static pressure of the surging force in SF6 gaseous tension, switching device interrupting process, centre conductor and other parts to be born. Voltage endurance capability is the comprehensive embodiment of disc insulator mechanical property, for the insulator of voltage endurance capability deficiency, bear relatively great machinery stress time can produce slight crack in inside or air gap causes shelf depreciation, thus greatly accelerate the aging of insulator.
At home in main high voltage switching device manufacturing concern, generally adopt the voltage endurance capability of the method inspection disc insulator of sampling hydraulic pressure rupture test. Being limit by disc insulator manufacturing process level of control, there is certain difference in the voltage endurance capability of different insulative, and the detected result fluctuation that hydraulic pressure destructive test obtains is big. The more important thing is, the water test can destroy disc insulator, even if not destroying, owing in the water test, water infiltrates in insulating material, insulator also cannot reliably, input for safety employs.
Up to now, there is not yet the method that can directly apply to high-tension switch gear disc insulator voltage endurance capability nondestructive testing.
Practical novel content
The purpose of this utility model is to provide a kind of disc insulator voltage endurance capability the cannot-harm-detection device, can damage the problem of disc insulator in order to solve existing detection method.
For achieving the above object, scheme of the present utility model comprises:
A kind of disc insulator voltage endurance capability the cannot-harm-detection device, comprise the pressurizing device for pneumatic testing, for the pressure test device of detected gas pressure, for being installed on disc insulator to be measured surface to detect the stress detection device of stress, and a recording unit; Pressurizing device progressively loads pressure, the stress at the setting position of described recording unit synchronous recording atmospheric pressure value and disc insulator to be measured in the process in the air pressure range of setting.
Further, described stress detection device is resistive patch formula pressure transmitter.
Further, described recording unit comprises datalogger and computer.
Further, described setting position is that maximum stress concentrates position
Basic ideas of the present utility model are: disc insulator is under hydraulic pressure or air pressure effect, and the change of its internal stress state is the immanent cause affecting its mechanical property, directly determines the size of insulator voltage endurance capability. With the change of Water hydraulic static pressure loading pressure, dependency between the two is drawn by measuring stress value position stress value in disc insulator hydraulic pressure rupture test process. For the product quality control producing part, according to the stress measurement curve that the test of side crops industry air pressure-loading obtains, its limit voltage endurance capability is predicted.
That is, only need to obtain the maximum stress that the setting position of disc insulator can carry, and then carry out the pneumatic testing of nondestructive, according to the air pressure simulated and stress relation, the atmospheric pressure value that maximum stress is corresponding can be calculated, maximum carrying pressure namely to be asked. The gas-tightness test equipment that required device is conventional adds pressure record device.
What the utility model was outstanding completes practical novel object, can not damage disc insulator, and the equipment adopted can be obtained by the improvement of existing tightness test device, and cost is lower.
Accompanying drawing explanation
Fig. 1 is dynamic stress measurement systematic schematic diagram;
Fig. 2 is water test strain-gauging result;
Fig. 3 is water test strain smoothing processing result;
Fig. 4 is water test results of stress;
Fig. 5 is water test hydraulic pressure measuring result;
Fig. 6 is results of stress under the different water pressure condition of the water test;
Fig. 7 is results of stress under the different water pressure condition of the 1-8 sample water test;
Fig. 8 is results of stress under No. 9 sample pressure test conditionss;
Fig. 9 is No. 9 sample pressure proof stress linear fit results;
Figure 10 is No. 9 sample 0-4.5MPa range hydraulic pressure internal stress calculation result;
Figure 11 is No. 9 sample 0-4.5MPa range hydraulic pressure internal stress measuring results and calculation result contrast;
Figure 12 is No. 10 sample pressure proof stress linear fit results;
Figure 13 is No. 10 sample 0-4.5MPa range hydraulic pressure internal stress calculation result;
Figure 14 is No. 10 sample 0-4.5MPa range hydraulic pressure internal stress measuring results and calculation result contrast.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
A kind of disc insulator voltage endurance capability the cannot-harm-detection device, comprise the pressurizing device for pneumatic testing, for the pressure test device of detected gas pressure, for being installed on disc insulator to be measured surface to detect the stress detection device of stress, and a recording unit; Pressurizing device progressively loads pressure, the stress at the setting position of described recording unit synchronous recording atmospheric pressure value and disc insulator to be measured in the process in the air pressure range of setting.
In fact this detection device can adopt the gas-tightness test equipment (gas-tightness test equipment belongs to prior art, mainly sealing and pressurizing device) of disc insulator, adds that stress detection device is formed.
Concrete, stress detection device is resistive patch formula pressure transmitter. Recording unit comprises datalogger and computer, namely can adopt the recording unit in hydraulic pressure rupture test.
From concrete use, process of the test, design, the principle of the utility model embodiment are carried out detail below. In device use procedure, main step is divided into:
1) maximum stress that the setting position of the same model of same voltage range or the disc insulator of different model can carry is obtained;
2) disc insulator to be measured is carried out pneumatic testing, in the air pressure range of setting, progressively load pressure, the stress at the setting position of synchronous recording atmospheric pressure value and disc insulator to be measured in the process;
3) to step 2) stress that obtains, air pressure data carry out linear fit, obtain the relation of stress with pressure variation, bring step 1 into) described maximum stress, solve the maximum carrying pressure of disc insulator to be measured.
According to above main thought, provide a concrete implementation process below.
One, first, carry out hydraulic pressure rupture test, to liking other disc insulators (identical or different model) being in identical voltage range from disc insulator to be measured.
Specifically comprise:
(1) disc insulator stress maximum position is analyzed
The method of finite element analysis is adopted the distribution situation of maximum stress in disc insulator pressure process to be calculated, obtain the distributing position of maximum stress in disc insulator pressure process, i.e. the calculation result of 1100kV disc insulator stress distribution situation under 4.0Mpa hydraulic pressure effect. Analyzing by calculation result it will be seen that disc insulator basin is along being stress maximum position with basin body junction, under 4.0Mpa hydraulic pressure effect, the stress value of this position is more than 15Mpa, is 3.75 times of applied load, there is obvious stress and concentrates. Afterwards, by hydraulic pressure rupture test, Theoretical Calculation result is verified. Can finding, disc insulator hydraulic pressure failure position concentrates on basin edge and basin body junction and stress maximum position, and this position circumferential crack distribution is obviously. Test-results is consistent with theoretical analysis result, and for 1100kV disc insulator, under inside water pressure loading environment, maximum stress concentrates on basin along the junction with basin body.
(2) dynamic stress measurement system constructing, equipment connection and optimum configurations
The stress measurement system schematic diagram of disc insulator dynamic water-pressure rupture test is as shown in Figure 1. This cover measuring system is made up of disc insulator test samples 1, seccotine 2, resistance strain gauge 3, wire 4, mobile data recorder 5, network connection 6, computer 7. The MDR that mobile data recorder 5 used is produced for Beijing Space Sida New Technology Equipment Co., Ltd moves data recorder, and passage number is 4. Adopt the mode of soldering that one end of wire 4 and resistance strain gauge 3 realize electrical connection, the other end of wire 4 is connected with mobile data recorder 5. Adopt seccotine 2 that resistance strain gauge 3 pastes disc insulator sample 1 maximum stress and concentrate position. Utilize network connection 6 to connect mobile data recorder 5 and computer 7, computer 7 is installed mobile data recording system, adopt the mode of network communication to realize the transfer between mobile data recorder 5 and computer 7. Adopting the MDR-80 being arranged on computer 7 to move the mobile data recorder 5 of data recording system control and carry out strain signal collection, sample frequency is set to 1K, and low pass is set to 100Hz.
(3) strain signal collection
Start to carry out internal pressure test, press " oscillography " button of mobile data recording system simultaneously, start the record of strain data. Being continued to increase from 0Mpa by loading pressure and break to disc insulator sample 1, record a loading force every 50s, when testing hydraulic pressure and be increased to 4.67Mpa, disc insulator sample 1 breaks. The strain data being recorded to is stored on computer 7, as shown in Figure 2.
(4) stress is with variation in water pressure curve acquisition
The strain data adopting smoothing processing mode to be obtained by Fig. 2 processes, and filters out noise information, obtains straining the change curve with the loading time, as shown in Figure 3. Pass between stress ��, strain stress and elastic modulus E is ��=E ��, and insulation part elastic modulus E is 1 �� 104Pa, it is possible to calculate the change curve of stress with the loading time further by Fig. 3, as shown in Figure 4. On the loading force and the basis of loading time of step 2 record, draw loading force curve over time, as shown in Figure 5. The data of composition graphs 4 and Fig. 5 can finally obtain the variation relation of stress maximum position place stress with hydraulic pressure, as shown in Figure 6.
(5) maximum bearing stress is determined
For the disc insulator of same voltage range, the essential characteristics such as its material, manufacturing process, shape size are identical, and thus, the maximum stress value that can carry for stress maximum position is substantially relatively. Fig. 7 show stress maximum position place stress that 1-8 test sample obtains in the hydraulic pressure rupture test process variation relation with hydraulic pressure. Observing and find, the pass of stress and hydraulic pressure is once linear relationship, and maximum stress value difference corresponding when insulator breaks is little, substantially concentrates on more than 7000MPa. For the disc insulator being applied to high-tension switch gear, in order to increase certain safety coefficient, it is determined that 7000MPa by the maximum bearing stress of research 1100kV voltage range disc insulator, bear the basis of stress level as its inside.
Being more than the detailed process of hydraulic pressure rupture test, major significance is the maximum stress value determining that the concentrated position of maximum stress can carry. Owing to having found that this stress value is applicable to the various disc insulators of same voltage range, therefore, it is possible to for disc insulator to be measured.
Mode is implemented, it is also possible to obtain by other means or directly obtain above-mentioned maximum stress value according to the data obtained in advance as other.
Two, pneumatic testing. Object is in the air pressure range of setting to test, and the air pressure range of setting refers to less air pressure range, namely even as big as destroying disc insulator, thus can not can not destroy disc insulator to be measured.
Detailed process is:
9-10 sample is carried out supporting capacity prediction (9-10 sample is disc insulator to be measured, and 1-8 sample is the disc insulator for hydraulic pressure rupture test). 1100kV voltage range disc insulator operating pressure is 0.6MPa, and the minimum carrying pressure that disc insulator requirement of dispatching from the factory reaches is 2.4MPa. First it is that under 1.8MPa test conditions, test sample is carried out little pressure-loaded test in 3 times of use air pressure range. The equipment of pneumatic testing is existing gas-tightness test equipment. The measuring result that Fig. 8 show under No. 9 sample pressure test conditionss stress value. The testing data obtained by Fig. 8 carries out linear fit, and as shown in Figure 9, the pass between the stress obtained and air pressure is fitting result: stress=1606.1 air pressure-8.47. The fitting result obtained according to Fig. 9, calculates the stress at No. 9 sample stress maximum position places within the scope of 0-4.5MPa, and result is as shown in Figure 10. Taking maximum bearing stress 7000MPa as basis for estimation, it is possible to when drawing conservative estimation, the maximum carrying pressure of No. 9 samples is 4.3MPa. As shown in figure 11, maximum hydraulic pressure when No. 9 samples break is 4.4MPa, demonstrates the feasibility of Forecasting Methodology in the contrast that No. 9 samples carry out proving test, test-results and calculation result afterwards in 0-4.5MPa range hydraulic pressure under hydraulic condition.
Figure 12 show No. 10 samples and carries out stress and the fitting result thereof that load test records in 0-1.8MPa air pressure range, and the pass between the stress obtained and air pressure is stress=2012.81 air pressure+55.4. The fitting result obtained according to Figure 12, calculates the stress at No. 10 sample stress maximum position places within the scope of 0-4.5MPa, and result is as shown in figure 13. Taking maximum bearing stress 7000MPa as basis for estimation, it is possible to when drawing conservative estimation, the maximum carrying pressure of No. 10 samples is 3.5MPa. As shown in figure 14, maximum hydraulic pressure when No. 10 samples break is 3.7MPa, demonstrates the feasibility of Forecasting Methodology in the contrast that No. 10 samples carry out proving test, test-results and calculation result afterwards in 0-4.5MPa range hydraulic pressure under hydraulic condition.
" the setting position " pointed out in above-mentioned main thought, in specific implementation process above, refers to that maximum stress concentrates position. Mode is implemented, it is also possible to be other positions, certainly when carrying out pneumatic testing, also this position must be carried out stress mornitoring as other.
It is presented above the embodiment that the utility model relates to, but the utility model is not limited to described enforcement mode. Under the thinking that the utility model provides; the mode easily expected to those skilled in the art is adopted the technique means in above-described embodiment to be converted, replace, revise; and the practical novel object substantially identical, that realize of the relevant art means in the effect played and the utility model is also substantially identical; above-described embodiment is carried out fine setting and is formed by the technical scheme formed like this, and this kind of technical scheme still falls in protection domain of the present utility model.
Claims (4)
1. disc insulator voltage endurance capability the cannot-harm-detection device, it is characterized in that, comprise the pressurizing device for pneumatic testing, for the pressure test device of detected gas pressure, for being installed on disc insulator to be measured surface to detect the stress detection device of stress, and a recording unit; Pressurizing device progressively loads pressure, the stress at the setting position of described recording unit synchronous recording atmospheric pressure value and disc insulator to be measured in the process in the air pressure range of setting.
2. a kind of disc insulator voltage endurance capability the cannot-harm-detection device according to claim 1, it is characterised in that, described stress detection device is resistive patch formula pressure transmitter.
3. a kind of disc insulator voltage endurance capability the cannot-harm-detection device according to claim 2, it is characterised in that, described recording unit comprises datalogger and computer.
4. a kind of disc insulator voltage endurance capability the cannot-harm-detection device according to claim 1, it is characterised in that, described setting position is that maximum stress concentrates position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520930538.2U CN205280505U (en) | 2015-11-20 | 2015-11-20 | Benzvalene form insulator seal pressure nondestructive test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520930538.2U CN205280505U (en) | 2015-11-20 | 2015-11-20 | Benzvalene form insulator seal pressure nondestructive test device |
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| Publication Number | Publication Date |
|---|---|
| CN205280505U true CN205280505U (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520930538.2U Expired - Fee Related CN205280505U (en) | 2015-11-20 | 2015-11-20 | Benzvalene form insulator seal pressure nondestructive test device |
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| Country | Link |
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| CN (1) | CN205280505U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486588A (en) * | 2015-11-20 | 2016-04-13 | 平高集团有限公司 | Nondestructive testing method and apparatus for pressure endurance capability of basin-type insulator |
| CN110082652A (en) * | 2019-04-29 | 2019-08-02 | 电力规划总院有限公司 | Choosing method, the device of arcing horn and insulator chain in overhead transmission line |
-
2015
- 2015-11-20 CN CN201520930538.2U patent/CN205280505U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486588A (en) * | 2015-11-20 | 2016-04-13 | 平高集团有限公司 | Nondestructive testing method and apparatus for pressure endurance capability of basin-type insulator |
| CN105486588B (en) * | 2015-11-20 | 2018-11-27 | 平高集团有限公司 | A kind of disc insulator voltage endurance capability lossless detection method and device |
| CN110082652A (en) * | 2019-04-29 | 2019-08-02 | 电力规划总院有限公司 | Choosing method, the device of arcing horn and insulator chain in overhead transmission line |
| CN110082652B (en) * | 2019-04-29 | 2021-09-03 | 电力规划总院有限公司 | Selection method and device for arcing horn and insulator string in overhead transmission line |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160601 Termination date: 20211120 |