CN104215519A - Cable conductor cracking resistance performance testing method - Google Patents
Cable conductor cracking resistance performance testing method Download PDFInfo
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- CN104215519A CN104215519A CN201310211514.7A CN201310211514A CN104215519A CN 104215519 A CN104215519 A CN 104215519A CN 201310211514 A CN201310211514 A CN 201310211514A CN 104215519 A CN104215519 A CN 104215519A
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Abstract
The invention discloses a cable conductor cracking resistance performance testing method, which comprises the following steps: providing a cable conductor sample, performing twisting and swirling tests on the cable conductor sample; reeling the cable conductor sample by a preset intensity on a test bar; performing a high temperature test on the cable conductor sample reeled on the test rod; and performing a deformation test on the cable conductor sample. The defect of the cable conductor sample can be found in short time through the comprehensive tests of swirling, reeling, deforming under high temperature and performing post-deformation under high temperature, purpose for detecting the cracking resistance performance of the cable conductor sample can be effectively reached, the cable conductor is detected and screened, and the defective samples can be verified, so that the cable conductor with high quality can be provided for the products, and product total reliability can be simultaneously increased.
Description
Technical field
The present invention relates to cable technical field of performance test, relate in particular to a kind of method of testing of cable anti-cracking performance.
Background technology
Cable, the insulation course of the main oversheath by the different materials such as rubber or plastics, metallic conductor and parcel conductor forms, and it connects two different electrified bodys assembly as a kind of safety uses extensive in light fixture.On portable lamp, except the effect that is connected and fixed as cap part and power unit, be also the wire that the energy must be provided while working for lamp holder.In use, cable can often be subject to coiling, the bending of external force; and along with the increase of service time; the other factorses such as that cable oversheath is subject to is aging, wearing and tearing there will be crackle; cause whole piece cable appearance cracking; lose the protection to internal insulating layer and conductor; finally cause lamp failure, lost its effect as protection insulation course and conductor.Therefore, the anti-cracking performance of cable is the important performance indexes of cable, and in prior art, there is no the method for testing that can quick and precisely detect the anti-cracking performance of cable.
Summary of the invention
Technical matters to be solved by this invention is, the anti-cracking performance that provides a kind of method of testing of cable anti-cracking performance can test out rapidly and accurately cable, for the selection of cable provides foundation.
In order to solve the problems of the technologies described above, embodiments of the invention provide a kind of method of testing of cable anti-cracking performance, and the method comprises the following steps:
Cable sample is provided;
Described cable sample is twisted and screwed test, described cable sample is applied to the power of screwing and make there is knotting effect on described cable sample;
Described cable sample is wound up on test bar to preset dynamics;
The cable sample that is wound on described test bar is carried out to high temperature test;
Described cable sample is carried out to deformation test.
Wherein, the method for testing of described cable anti-cracking performance also comprises, checks that whether the oversheath of described cable sample is normal.
Wherein, in the whether normal step of oversheath of the described cable sample of described inspection, check whether described cable sample exists the abnormal conditions that comprise crackle, powder away and ftracture.
Wherein, the length of described cable sample is 50cm～65cm.
Wherein, screw test, described cable sample applied in the step that the power of screwing makes to have on described cable sample knotting effect described cable sample is twisted, the power of screwing that described cable sample is applied is 2kg～4kg, while having knotting effect, stops when twisting with every 1cm place on described cable sample.
Wherein, described default dynamics is 4kg～6kg, and the diameter of described test bar is 1.5～2 times of described cable sample diameter.The number of turns that described cable sample is wound on described test bar is 6～7 circles.
Wherein, carry out in the step of high temperature test at the cable sample to being wound on described test bar, further comprising the steps of:
The cable sample that is wound on described test bar is incubated to Preset Time with preset temperature, and preset temperature is higher than normal temperature.
The temperature of the cable sample that is wound on described test bar is returned to normal temperature.
Cable sample is pulled down from described test bar, and stretching.
Wherein, described preset temperature is 130～170 degrees Celsius, and described Preset Time is 160min～200min.
Wherein, described cable sample is carried out in the step of deformation test, further comprising the steps of:
Described cable sample and a moist object interval are arranged, described in be spaced apart described cable sample diameter 0.5-3 doubly;
Described cable sample is applied to axial tension, and axial tension is 0.8kg～1.5kg;
To applying high pressure more than 1500V between the oversheath of described moist object and described cable sample, keep 50s～70s; And observe between the oversheath of described cable sample and described moist object and have or not and puncture spark phenomenon.
Wherein, on described moist object, offer narrow slit, the width of described narrow slit is 2～7 times of described cable sample diameter; Described cable sample is vertically arranged in described narrow slit; One end of described cable sample is fixed on a support, and the other end hangs a load.
The method of testing of the cable anti-cracking performance that the embodiment of the present invention provides, the integration test that screws, is out of shape after coiling, high temperature and high temperature by twisting, find at short notice the defect of cable sample, effectively reach the object of detection streamer line sample anti-cracking performance; Can detect cable, screening, verifies bad sample, thereby for product provides the cable of high-quality, improves the overall reliability of product simultaneously.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the process flow diagram of the method for testing of the cable anti-cracking performance that provides of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Referring to Fig. 1, the method for testing of the cable anti-cracking performance that the preferred embodiment for the present invention provides, comprises the following steps.
Step S1, provide cable sample.
For ease of testing, the length of cable sample is 50cm～65cm.Particularly, at normal temperatures cable is carried out to cutting by the length of every section of 50cm～65cm.When test, can make multistage cable sample, and be numbered differentiation.Herein, the cable that can provide same supplier is made multistage cable sample and is tested simultaneously, and the cable also multiple suppliers being provided is made respectively sample; If test simultaneously, can contrast the performance of different suppliers' cable.
Whether the oversheath of step S2, inspection cable sample is normal.
Whether this step can be normal by checking cable sample under bright light, whether the oversheath that checks cable sample exists comprises crackle, powder away and the abnormal conditions of cracking etc., the unfavorable condition existing to avoid cable sample to dispatch from the factory, prevent from, in the test erroneous judgement to result midway, ensureing test accurately and reliably.
Step S3, cable sample is twisted and screwed test, cable sample is applied to the power of screwing and make on cable sample, there is knotting effect.In use be subject to cross shear by this analog electrical cable, accelerate the fission of cable appearance sheath material structure.
In this step, the power of screwing that cable sample is applied is 2kg～4kg, while having knotting effect, stops when twisting with every 1cm place on cable sample.Twist direction is left-handed, and to curl up direction consistent with the electric wire of cable sample interior, to ensure that cable sample is subject to larger shearing force.
Whether the oversheath of step S4, inspection cable sample is normal.
Whether cable sample oversheath exists comprises crackle, powder away and the abnormal conditions of cracking etc.If exist extremely, illustrate that this cable sample is undesirable, stop the test to this cable sample; Meanwhile, the cable sample that can other not occurred to abnormal conditions is proceeded next step test.
Step S5, cable sample is closely wound on test bar to preset dynamics, with test that cable sample is reeled.
Particularly, default dynamics is 4kg～6kg, thereby can make cable sample be closely wound on test bar.The diameter of test bar is 1.5～2 times of cable sample diameter.For avoiding cable sample to cause wearing and tearing to test bar, test bar is that metal material is made.The number of turns that cable sample is wound on test bar is 6～7 circles.
While reeling test, first one end of cable sample is fixed on test bar, then cable sample is closely wound on test bar by the power of 4kg～6kg, reel after 6～7 circles, the other end of cable sample is tightened, prevented that the reacting force of cable sample from causing getting loose.By cable sample is wound up on test bar, the appearance sheath that can accelerate cable sample can be subject to larger deformation force in follow-up test.
Whether the oversheath of step S6, inspection cable sample is normal.
Whether cable sample oversheath exists comprises crackle, powder away and the abnormal conditions of cracking etc.If there are abnormal conditions, can stop the test to this cable sample; If without abnormal conditions, continue next step test.
Step S7, the cable sample that is wound on test bar is carried out to high temperature test.This step can be accelerated cable sheath material by hot environment and produce aging.This step specifically comprises the following steps.
Step S71, the cable sample that is wound on test bar is incubated to Preset Time with preset temperature, preset temperature is higher than normal temperature.
Preset temperature is 130～170 degrees Celsius, and Preset Time is 160min～200min, to accelerate to expose the defect of cable.In this step, can adopt high-temperature cabinet to be incubated it, particularly, 150 degrees Celsius of the temperature of high-temperature cabinet can be set, in the time that the temperature of high-temperature cabinet reaches 150 degrees Celsius, start timing, continue 180min.
If multiple cable samples are tested, multiple cable samples interval in high-temperature cabinet arranges, and the interval between adjacent two cable samples is greater than 20cm.
Step S72, the temperature of the cable sample that is wound on test bar is returned to normal temperature.Particularly, cable sample is taken out from high-temperature cabinet, put at normal temperatures, until it returns to normal temperature.
Step S73, cable sample is pulled down from test bar, and stretching.
Step S8, check the whether normal of cable sample oversheath.Particularly, checking whether cable sample oversheath exists comprises crackle, powders away and the abnormal conditions of cracking etc.Check the feel situation of cable sample oversheath, check the degree of aging of cable sample, and record.
Step S9, cable sample is carried out to the deformation test after high temperature.Because cable is subject to easily to ftracture in knee after hot environment, carry out voltage-withstand test at the state that is subject to pulling force, investigate the sheath cracking situation of cable, whether there is crackle and puncture.
Cable sample and a moist object interval are arranged, and this interval can be 0.5-3 times of cable sample diameter.Cable sample is applied to axial tension, and axial tension is 0.8kg～1.5kg.To applying high pressure more than 1500V between the oversheath of moist object and cable sample, and keep 50s～70s, observe between the oversheath of cable sample and moist object simultaneously and whether exist and puncture spark phenomenon; Cancel after high pressure, observe cable sample and whether have high-voltage breakdown point.Breakdown point is the beginning that crackle produces the initial stage, also for checking the important indicator of cable performance.
In specific implementation process, using the plastic foam piece of a humidity as moist object, and offer a narrow slit thereon, the width of this narrow slit is 2～7 times of cable sample diameter.Cable sample is arranged in vertical narrow slit, and one end of cable sample is fixed on support, and the other end hangs a load, and the weight of this load is 0.8kg～1.5kg, is 1kg in present embodiment.Utilize load to cable sample with axial tension, convenient operation.
In present embodiment, by a voltage resistant instrument, cable sample and moist object are exerted pressure.One end of voltage resistant instrument is connected with moist object, the other end is connected with the oversheath of cable sample, between the two, apply the high pressure of 2000V, and keep 1min, observe during this time between the oversheath of withstand voltage process cable sample and moist object and have or not and puncture spark phenomenon.Finally take off cable sample.
Whether the oversheath of step S10, inspection cable sample is normal.
Whether the oversheath that not only checks cable sample in this step exists comprises crackle, powder away and the abnormal conditions of cracking etc., also will check that cable sample has or not high-voltage breakdown point simultaneously.
In the time that individual cable line sample is tested, if cable sample exists breakdown point, can stop test.In the time that multiple cable samples are tested simultaneously, if there is breakdown point in one of them cable sample, can carry out the loop test of step S3 to step S10 to other cable samples, stop test until obvious crackle or when cracking appear in the oversheath of cable sample, or stop test can specify the anti-cracking performance height of multiple cable samples time.By the method, can distinguish fast the performance of different suppliers' cable, for light fixture used provides good qualified cable, improve the reliability of light fixture entirety.
The method of testing of the cable anti-cracking performance that the embodiment of the present invention provides, screw the integration test of being out of shape after test, coiling test, high temperature test and high temperature by twisting, find at short notice the defect of cable sample, effectively reach the object of detection streamer line sample anti-cracking performance.After each test after twisting screws test, coiling test, high temperature test and high temperature in four tests of deformation test, be in step S1, S3, S5, S7, S9 after each step, all can carry out the whether normally step of described inspection cable sample oversheath, so that unusual circumstance in time, certainly, also can be after certain two step or multiple step, then carry out the whether normal step of described inspection cable sample oversheath.
The method of testing of the cable anti-cracking performance that the embodiment of the present invention provides, can detect first cable when sample presentation because design or manufacture craft do not meet the latent defect of bringing in supplier, find in advance the defect that this type of cable sample exists, avoid its oversheath after using after a while to occur crackle, powder away, rupturing causes whole light fixture to break down.This method of testing can detect the cable of new supplier, different model, and screening, verifies bad sample, for product provides the cable of high-quality and improves the overall reliability of product.
This detection method foundation that has been the new product development offering sample of selecting high-quality, for cable Incoming Quality Control provides a kind of method of inspection, make the product can be after long-term use, still there is higher quality level, meet the long-term demand using of client, also be of value to the fiduciary level that improves product, make product there is the higher market competitiveness simultaneously.
Above-described embodiment, does not form the restriction to this technical scheme protection domain.The amendment done within any spirit at above-mentioned embodiment and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of this technical scheme.
Claims (10)
1. a method of testing for cable anti-cracking performance, is characterized in that, the method comprises the following steps:
Cable sample is provided;
Described cable sample is twisted and screwed test, described cable sample is applied to the power of screwing and make there is knotting effect on described cable sample;
Described cable sample is wound up on test bar to preset dynamics;
The cable sample that is wound on described test bar is carried out to high temperature test;
Described cable sample is carried out to deformation test.
2. the method for testing of cable anti-cracking performance according to claim 1, is characterized in that, the method for testing of described cable anti-cracking performance also comprises, checks that whether the oversheath of described cable sample is normal.
3. the method for testing of cable anti-cracking performance according to claim 2, it is characterized in that, in the whether normal step of oversheath of the described cable sample of described inspection, check whether described cable sample exists the abnormal conditions that comprise crackle, powder away and ftracture.
4. the method for testing of cable anti-cracking performance according to claim 1, is characterized in that, the length of described cable sample is 50cm～65cm.
5. the method for testing of cable anti-cracking performance according to claim 1, it is characterized in that, screw test, described cable sample applied in the step that the power of screwing makes to have on described cable sample knotting effect described cable sample is twisted, the power of screwing that described cable sample is applied is 2kg～4kg, while having knotting effect, stops when twisting with every 1cm place on described cable sample.
6. the method for testing of cable anti-cracking performance according to claim 1, is characterized in that, described default dynamics is 4～6kg, and the diameter of described test bar is 1.5～2 times of described cable sample diameter; The number of turns that described cable sample is wound on described test bar is 6～7 circles.
7. the method for testing of cable anti-cracking performance according to claim 1, is characterized in that, carries out in the step of high temperature test at the cable sample to being wound on described test bar, further comprising the steps of:
The cable sample that is wound on described test bar is incubated to Preset Time with preset temperature, and preset temperature is higher than normal temperature;
The temperature of the cable sample that is wound on described test bar is returned to normal temperature;
Cable sample is pulled down from described test bar, and stretching.
8. the method for testing of cable anti-cracking performance according to claim 7, is characterized in that, described preset temperature is 130～170 degrees Celsius, and described Preset Time is 160min～200min.
9. the method for testing of cable anti-cracking performance according to claim 1, is characterized in that, described cable sample is carried out in the step of deformation test, further comprising the steps of:
Described cable sample and a moist object interval are arranged, described in be spaced apart described cable sample diameter 0.5-3 doubly;
Described cable sample is applied to axial tension, and axial tension is 0.8kg～1.5kg;
To applying high pressure more than 1500V between the oversheath of described moist object and described cable sample, keep 50s～70s; And observe between the oversheath of described cable sample and described moist object and have or not and puncture spark phenomenon.
10. the method for testing of cable anti-cracking performance according to claim 9, is characterized in that, on described moist object, offers narrow slit, and the width of described narrow slit is 2～7 times of described cable sample diameter; Described cable sample is vertically arranged in described narrow slit; One end of described cable sample is fixed on a support, and the other end hangs a load.
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| CN106769568A (en) * | 2017-01-20 | 2017-05-31 | 杭州富通通信技术股份有限公司 | The test method of the fire-retardant optical cable sheath anti-cracking performance of Fast Evaluation |
| CN107631927A (en) * | 2017-09-07 | 2018-01-26 | 通鼎互联信息股份有限公司 | The cracking resistance test device and cracking resistance method of testing of butterfly leading in cable |
| CN108458937A (en) * | 2018-06-12 | 2018-08-28 | 西安西古光通信有限公司 | A method of assessment outdoor optical cable fire retardant jacket Thermal cracking performance |
| CN108801332A (en) * | 2018-03-24 | 2018-11-13 | 浙江海宁普赛自动化科技有限公司 | A kind of characterization processes in power cord production system |
| CN109163969A (en) * | 2018-09-03 | 2019-01-08 | 河南检亿科技有限公司 | A kind of device for the test of wire and cable cracking resistance |
| CN111273138A (en) * | 2020-02-24 | 2020-06-12 | 远东电缆有限公司 | Suspended cable fire resistance test device and method for super high-rise building |
| CN111351750A (en) * | 2020-04-14 | 2020-06-30 | 国网安徽省电力有限公司铜陵市义安区供电公司 | Appearance detection device for high-voltage transmission cable |
| CN113884390A (en) * | 2021-03-11 | 2022-01-04 | 四川大学 | High-temperature tensile test cabin for armored cable of heat insulation test bed |
| CN115127934A (en) * | 2022-06-17 | 2022-09-30 | 江苏中利集团股份有限公司 | Cable static minimum turning radius detection method |
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| CN109682701A (en) * | 2017-01-20 | 2019-04-26 | 杭州富通通信技术股份有限公司 | A method of evaluating fire-retardant optical cable sheath anti-cracking performance |
| CN106769568B (en) * | 2017-01-20 | 2019-02-12 | 杭州富通通信技术股份有限公司 | The test method of the fire-retardant optical cable sheath anti-cracking performance of Fast Evaluation |
| WO2019047427A1 (en) * | 2017-09-07 | 2019-03-14 | 通鼎互联信息股份有限公司 | Cracking-resistant testing device of bow-type drop cable and cracking-resistant testing method |
| CN107631927A (en) * | 2017-09-07 | 2018-01-26 | 通鼎互联信息股份有限公司 | The cracking resistance test device and cracking resistance method of testing of butterfly leading in cable |
| CN108801332A (en) * | 2018-03-24 | 2018-11-13 | 浙江海宁普赛自动化科技有限公司 | A kind of characterization processes in power cord production system |
| CN108458937A (en) * | 2018-06-12 | 2018-08-28 | 西安西古光通信有限公司 | A method of assessment outdoor optical cable fire retardant jacket Thermal cracking performance |
| CN109163969A (en) * | 2018-09-03 | 2019-01-08 | 河南检亿科技有限公司 | A kind of device for the test of wire and cable cracking resistance |
| CN111273138A (en) * | 2020-02-24 | 2020-06-12 | 远东电缆有限公司 | Suspended cable fire resistance test device and method for super high-rise building |
| CN111351750A (en) * | 2020-04-14 | 2020-06-30 | 国网安徽省电力有限公司铜陵市义安区供电公司 | Appearance detection device for high-voltage transmission cable |
| CN113884390A (en) * | 2021-03-11 | 2022-01-04 | 四川大学 | High-temperature tensile test cabin for armored cable of heat insulation test bed |
| CN113884390B (en) * | 2021-03-11 | 2023-04-25 | 四川大学 | High-temperature tensile test cabin for armor cable of heat preservation test stand |
| CN115127934A (en) * | 2022-06-17 | 2022-09-30 | 江苏中利集团股份有限公司 | Cable static minimum turning radius detection method |
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Application publication date: 20141217 |