CN106092777A - Detection method based on cable insulating sheath heat extensibility energy - Google Patents
Detection method based on cable insulating sheath heat extensibility energy Download PDFInfo
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- CN106092777A CN106092777A CN201610398409.2A CN201610398409A CN106092777A CN 106092777 A CN106092777 A CN 106092777A CN 201610398409 A CN201610398409 A CN 201610398409A CN 106092777 A CN106092777 A CN 106092777A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
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Abstract
The present invention relates to detection method based on cable insulating sheath heat extensibility energy, comprise the following steps: S1, sampling；S2, preheating；S3, applying stress；S4, heat and measure；S5, double measurement: release weight, make sample recover 4～6min under 190～210 DEG C of temperature environments, then take out sample, be cooled to room temperature, again measure the distance between two mark lines, the mark line spacing after being stretched；S6, calculating percentage elongation；S6, repetition step S2～S6；S7, percentage elongation is sought intermediate value, obtain sample heat extensibility energy assessed value.It is an advantage of the current invention that: by cable clamp on test stand, record the distance between original marking line, cable is made to be in the condition of high temperature, recycling weight applies pressure to cable, put into heating plastic deformation in baking box, after cooling, record the mark line spacing after stretching, by calculating the meansigma methods of extensibility as assessed value, simple to operate, test result precision is high.
Description
Technical field
The present invention relates to cable performance technical field of measurement and test, be based particularly on the detection of cable insulating sheath heat extensibility energy
Method.
Background technology
It is examination insulant plastic deformation and a kind of method of inspection of permanent deformation under heat and load effect that heat extends,
Under conditions of using the test temperature more much higher than Applicable temperature and certain heavy burden, through the elongation percentage of the heat ageing of short period
Numbering embody a kind of test of the good permanent deformation of plastic deformation.If deformed under heat and load effect, mechanicalness can be lost
Can, directly resulting in short circuit, cable cannot normally use.
And cable is likely to occur plastic deformation when running in the environment of higher temperature, it is therefore necessary to its heat is extended
Performance detects, to ensure quality when product is properly functioning.
The detection method trivial operations of existing cable insulating sheath heat extensibility energy, and accurate testing degree is poor, difficult
Using the judging basis as examination cable thermal deformation performance.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of simple to operate, test result precision height
Based on cable insulating sheath heat extensibility can detection method.
The purpose of the present invention is achieved through the following technical solutions: detection side based on cable insulating sheath heat extensibility energy
Method, comprises the following steps:
S1, sampling: from the tested insulated wire cores sample section of many a length of 250～500mm, intercept 3 adjacent samples, and in examination
Doing two mark lines on sample, the distance between two mark lines is 50～100mm；
S2, preheating: baking oven is preheated so that it is temperature to 190～210 DEG C；
S3, apply stress: sample and one piece of steel ruler are clamped on test stand, the zero graduation line of steel ruler be positioned at sample top
Mark line aligns, and reads original marking wire spacing, hangs up weight in the lower end of test specimen；
S4, heat and measure: after test specimen is put into baking oven, starting timing after reaching to preheat temperature, measure immediately after 14～16min
Distance between markings；
S5, double measurement: release weight, make sample recover 4～6min under 190～210 DEG C of temperature environments, then take out examination
Sample, is cooled to room temperature, again measures the distance between two mark lines, the mark line spacing after being stretched；
S6, calculating percentage elongation, concrete formula is as follows:
Percentage elongation=(the mark line spacing-original marking wire spacing after stretching)/original marking wire spacing * 100%；
All samples are detected by S6, repetition step S2～S6 respectively；
S7, percentage elongation is sought intermediate value, obtain sample heat extensibility energy assessed value.
In step S4, described baking oven is the baking oven of band observation window, and the distance between surveying marker line is directly carried out in baking oven
Measure.
In step S5, the concrete operations releasing weight are to cut off the sample at lower chuck.
The invention have the advantages that the present invention by cable clamp on test stand, record the distance between original marking line,
Making cable be in the condition of high temperature, recycling weight applies pressure to cable, puts into heating plastic deformation in baking box, records after cooling
Mark line spacing after stretching, by the meansigma methods of calculating extensibility as assessed value, simple to operate, test result precision
High.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, but protection scope of the present invention is not limited to following institute
State.
[embodiment 1]
Detection method based on cable insulating sheath heat extensibility energy, comprises the following steps:
S1, sampling: from the tested insulated wire cores sample section of many a length of 500mm, intercept 3 adjacent samples, and do on sample
Two mark lines, the distance between two mark lines is 100mm；
S2, preheating: baking oven is preheated so that it is temperature to 210 DEG C；
S3, apply stress: sample and one piece of steel ruler are clamped on test stand, the zero graduation line of steel ruler be positioned at sample top
Mark line aligns, and reads original marking wire spacing, hangs up weight in the lower end of test specimen；
S4, heat and measure: after test specimen is put into baking oven, starting timing after reaching to preheat temperature, after 16min, measure mark immediately
Distance between will line；
S5, double measurement: release weight, make sample recover 6min under 210 DEG C of temperature environments, then take out sample, be cooled to
Room temperature, measures the distance between two mark lines again, the mark line spacing after being stretched；
S6, calculating percentage elongation, concrete formula is as follows:
Percentage elongation=(the mark line spacing-original marking wire spacing after stretching)/original marking wire spacing * 100%；
All samples are detected by S6, repetition step S2～S6 respectively；
S7, percentage elongation is sought intermediate value, obtain sample heat extensibility energy assessed value.
In step S4, described baking oven is the baking oven of band observation window, and the distance between surveying marker line is directly carried out in baking oven
Measure.
In step S5, the concrete operations releasing weight are to cut off the sample at lower chuck.
[embodiment 2]
Detection method based on cable insulating sheath heat extensibility energy, comprises the following steps:
S1, sampling: from the tested insulated wire cores sample section of many a length of 380mm, intercept 3 adjacent samples, and do on sample
Two mark lines, the distance between two mark lines is 80mm；
S2, preheating: baking oven is preheated so that it is temperature to 200 DEG C；
S3, apply stress: sample and one piece of steel ruler are clamped on test stand, the zero graduation line of steel ruler be positioned at sample top
Mark line aligns, and reads original marking wire spacing, hangs up weight in the lower end of test specimen；
S4, heat and measure: after test specimen is put into baking oven, after reaching to preheat temperature, starting timing, surveying marker immediately after 15min
Distance between line；
S5, double measurement: release weight, make sample recover 5min under 200 DEG C of temperature environments, then take out sample, be cooled to
Room temperature, measures the distance between two mark lines again, the mark line spacing after being stretched；
S6, calculating percentage elongation, concrete formula is as follows:
Percentage elongation=(the mark line spacing-original marking wire spacing after stretching)/original marking wire spacing * 100%；
All samples are detected by S6, repetition step S2～S6 respectively；
S7, percentage elongation is sought intermediate value, obtain sample heat extensibility energy assessed value.
In step S4, described baking oven is the baking oven of band observation window, and the distance between surveying marker line is directly carried out in baking oven
Measure.
In step S5, the concrete operations releasing weight are to cut off the sample at lower chuck.
[embodiment 3]
Detection method based on cable insulating sheath heat extensibility energy, comprises the following steps:
S1, sampling: from the tested insulated wire cores sample section of many a length of 250mm, intercept 3 adjacent samples, and do on sample
Two mark lines, the distance between two mark lines is 50mm；
S2, preheating: baking oven is preheated so that it is temperature to 190 DEG C；
S3, apply stress: sample and one piece of steel ruler are clamped on test stand, the zero graduation line of steel ruler be positioned at sample top
Mark line aligns, and reads original marking wire spacing, hangs up weight in the lower end of test specimen；
S4, heat and measure: after test specimen is put into baking oven, after reaching to preheat temperature, starting timing, surveying marker immediately after 14min
Distance between line；
S5, double measurement: release weight, make sample recover 4min under 190 DEG C of temperature environments, then take out sample, be cooled to
Room temperature, measures the distance between two mark lines again, the mark line spacing after being stretched；
S6, calculating percentage elongation, concrete formula is as follows:
Percentage elongation=(the mark line spacing-original marking wire spacing after stretching)/original marking wire spacing * 100%；
All samples are detected by S6, repetition step S2～S6 respectively；
S7, percentage elongation is sought intermediate value, obtain sample heat extensibility energy assessed value.
In step S4, described baking oven is the baking oven of band observation window, and the distance between surveying marker line is directly carried out in baking oven
Measure.
In step S5, the concrete operations releasing weight are to cut off the sample at lower chuck.
Claims (3)
1. detection method based on cable insulating sheath heat extensibility energy, it is characterised in that: comprise the following steps:
S1, sampling: from the tested insulated wire cores sample section of many a length of 250～500mm, intercept 3 adjacent samples, and in examination
Doing two mark lines on sample, the distance between two mark lines is 50～100mm；
S2, preheating: baking oven is preheated so that it is temperature to 190～210 DEG C；
S3, apply stress: sample and one piece of steel ruler are clamped on test stand, the zero graduation line of steel ruler be positioned at sample top
Mark line aligns, and reads original marking wire spacing, hangs up weight in the lower end of test specimen；
S4, heat and measure: after test specimen is put into baking oven, starting timing after reaching to preheat temperature, measure immediately after 14～16min
Distance between markings；
S5, double measurement: release weight, make sample recover 4～6min under 190～210 DEG C of temperature environments, then take out examination
Sample, is cooled to room temperature, again measures the distance between two mark lines, the mark line spacing after being stretched；
S6, calculating percentage elongation, concrete formula is as follows:
Percentage elongation=(the mark line spacing-original marking wire spacing after stretching)/original marking wire spacing * 100%；
All samples are detected by S6, repetition step S2～S6 respectively；
S7, percentage elongation is sought intermediate value, obtain sample heat extensibility energy assessed value.
Detection method based on cable insulating sheath heat extensibility energy the most according to claim 1, it is characterised in that: step
In S4, described baking oven is the baking oven of band observation window, and the distance between surveying marker line is directly measured in baking oven.
Detection method based on cable insulating sheath heat extensibility energy the most according to claim 1, it is characterised in that: step
In S5, the concrete operations releasing weight are to cut off the sample at lower chuck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610398409.2A CN106092777A (en) | 2016-06-07 | 2016-06-07 | Detection method based on cable insulating sheath heat extensibility energy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610398409.2A CN106092777A (en) | 2016-06-07 | 2016-06-07 | Detection method based on cable insulating sheath heat extensibility energy |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211693A (en) * | 2018-09-06 | 2019-01-15 | 澳帕曼织带（昆山）有限公司 | A kind of ribbon elongation percentage measurement method |
| CN110864977A (en) * | 2019-12-06 | 2020-03-06 | 芜湖航天特种电缆厂股份有限公司 | Low-temperature tensile test method for cable |
| CN112014421A (en) * | 2020-09-24 | 2020-12-01 | 安徽优泰新材料有限公司 | High-temperature-resistant detection method for nylon heat insulation strip |
| CN112213210A (en) * | 2020-09-28 | 2021-01-12 | 安徽徽宁电器仪表集团有限公司 | Thermal extension test detection equipment for tubular insulation test piece |
| CN113504126A (en) * | 2021-07-08 | 2021-10-15 | 思嘉环保材料科技（上海）有限公司 | PVC net clamping cloth constant-weight elongation rate detection device and use method thereof |
| CN113933157A (en) * | 2021-10-12 | 2022-01-14 | 江苏省电力试验研究院有限公司 | Tension test method and device for cable insulation dumbbell test piece |
| CN114324012A (en) * | 2021-11-14 | 2022-04-12 | 国网辽宁省电力有限公司电力科学研究院 | Digital image processing thermal extension test system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211693A (en) * | 2018-09-06 | 2019-01-15 | 澳帕曼织带（昆山）有限公司 | A kind of ribbon elongation percentage measurement method |
| CN110864977A (en) * | 2019-12-06 | 2020-03-06 | 芜湖航天特种电缆厂股份有限公司 | Low-temperature tensile test method for cable |
| CN112014421A (en) * | 2020-09-24 | 2020-12-01 | 安徽优泰新材料有限公司 | High-temperature-resistant detection method for nylon heat insulation strip |
| CN112014421B (en) * | 2020-09-24 | 2024-01-16 | 安徽优泰新材料有限公司 | High temperature resistance detection method for nylon heat insulation strip |
| CN112213210A (en) * | 2020-09-28 | 2021-01-12 | 安徽徽宁电器仪表集团有限公司 | Thermal extension test detection equipment for tubular insulation test piece |
| CN112213210B (en) * | 2020-09-28 | 2023-11-14 | 安徽徽宁电器仪表集团有限公司 | Tubular insulation test piece thermal extension test detection equipment |
| CN113504126A (en) * | 2021-07-08 | 2021-10-15 | 思嘉环保材料科技（上海）有限公司 | PVC net clamping cloth constant-weight elongation rate detection device and use method thereof |
| CN113504126B (en) * | 2021-07-08 | 2022-09-02 | 思嘉环保材料科技（上海）有限公司 | PVC net clamping cloth constant-weight elongation rate detection device and use method thereof |
| CN113933157A (en) * | 2021-10-12 | 2022-01-14 | 江苏省电力试验研究院有限公司 | Tension test method and device for cable insulation dumbbell test piece |
| CN114324012A (en) * | 2021-11-14 | 2022-04-12 | 国网辽宁省电力有限公司电力科学研究院 | Digital image processing thermal extension test system |
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Application publication date: 20161109 |