Specimen mold for electrical breakdown testing of polymer thick insulating flat structures
A technology of polymer and electrical breakdown, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc. It can solve the problems of surface discharge and the decrease in the accuracy of breakdown detection data, so as to improve the distance along the surface, suppress the phenomenon of discharge along the surface, Guaranteed consistent effect
Active Publication Date: 2021-01-08
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
[0003] Aiming at the defect that the medium is prone to discharge along the surface in the current electric breakdown detection and leads to the decrease of the accuracy of the breakdown detection data, the present invention proposes a sample mold suitable for the electric breakdown test of the polymer thick insulating flat plate structure, which can effectively Suppresses surface discharge phenomenon under high electric field, and at the same time, the breakdown detection data has high consistency
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[0024] like figure 1 As shown, it is a sample mold applicable to the electric breakdown test of polymer thick insulating plate structure involved in this embodiment, which includes a spiral micrometer 1 with a beam, a guide column 2, a shell with fixing screws 4, a shell Tool 9 and cylindrical flat metal electrode 6. After the symmetrical housing is assembled, there are guide column fixing base 3 , electrode fixing base 7 and extrusion port 8 . The inside of the shell is in the shape of ring corrugation 5 .
[0025] The upper part of the casing is provided with an injection port notch 10 , a notch 11 with a protrusion on the upper side, a semicircular base 12 , a threaded through hole 13 on the outside of the case and a notch 14 with a protrusion on the lower side.
[0026] The screw micrometer includes: a fine adjustment knob 15 , a coarse adjustment knob 16 , a reading area 17 and circular through holes 18 and 19 , wherein: the circular through hole 19 has a screw hole 20 ...
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A device for detecting electrical breakdown performance of a polymer insulation plate is provided. The device comprises: two oppositely arranged shells with an annular corrugated structure inside, a pair of metal electrodes arranged at two ends of the shells, and a spiral micrometer arranged outside the shells. The annular corrugated structure inside the combined shell forms an internal circuit, and the two metal electrodes are arranged in the internal circuit and are not in contact. According to the technical scheme of the present invention, the occurrence of the creeping discharge phenomenonunder a high electric field can be effectively suppressed and high consistency can be ensured in the breakdown detection data.
Description
technical field [0001] The invention relates to a technique in the field of detection of solid insulating materials, in particular to a sample mold suitable for electrical breakdown testing of polymer thick insulating flat plate structures. Background technique [0002] The breakdown strength of an insulating material determines its ultimate ability to maintain insulating performance, and is an important factor in measuring insulation performance and material life. Under a uniform electric field, after eliminating the edge effect, the breakdown field strength reflects the dielectric strength of the dielectric. After the thickness is reduced to a relatively thin one, the breakdown field strength starts to increase as the thickness decreases. Since the breakdown field strength of polymer materials is much higher than that of air, surface discharge or dielectric breakdown under uneven electric field at the edge of the electrode often occurs when flat sheet polymer samples are ...
Claims
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IPC IPC(8): G01R31/20
CPCG01R31/20
Inventor 尹毅刘德远吴建东
Owner SHANGHAI JIAO TONG UNIV