Manufacturing method of distribution cable body main insulating layer hole defect model
A technology for the main insulation layer and distribution cables, which is applied in the directions of detecting faults according to conductor types, measuring electricity, and measuring electrical variables, etc., and can solve problems such as not providing a method for making holes in the main insulation of the cable body.
Inactive Publication Date: 2021-03-16
JIANGMEN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID
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In this scheme, six kinds of defect models can be produced and the replacement of the defect models in the test can be realized by using the plug-in method, but there is no method for making the main insulation hole defect of the cable body
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[0024] The present invention will be further described below in combination with specific embodiments. Wherein, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, Enlargement or reduction does not represent the size of the actual product; for those skilled in the art, it is understandable that certain known structures and their descriptions in the drawings may be omitted.
[0025] In the drawings of the embodiments of the present invention, the same or similar symbols correspond to the same or similar components; The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention an...
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The invention relates to the field of cable simulation tests, and particularly relates to a manufacturing method of a distribution cable body main insulating layer hole defect model. A model comprisesa cable connected with a joint, the cable comprises a copper wire core, the annular outer side of the copper wire core is provided with the main insulating layer, and the annular outer side of the main insulating layer is provided with an outer semi-conductive layer. A copper shield is arranged on the annular outer side of the outer semi-conductive layer, an inner protective layer is arranged onthe annular outer side of the copper shield, a steel armor is arranged on the annular outer side of the inner protective layer, and an outer sheath is arranged on the annular outer side of the steel armor. The manufacturing method comprises the following steps: firstly, stripping the outer sheath, the steel armor and the inner sheath of the cable, and then stripping the copper shield, the outer semi-conductive layer and the main insulating layer of the cable layer by layer; and exposing a copper wire core, using a needle to form an air gap in the radial direction of the main insulating layer,filling the surface of the air gap with an insulating material structure, and generating hole defects. The hole defects, generated in the manufacturing and installing process, of the main insulating layer of the cable body are truly simulated on the basis that safety is guaranteed and other structures are not damaged.
Description
technical field [0001] The invention relates to the field of cable simulation tests, in particular to a method for making a cavity defect model of a main insulating layer of a distribution cable body. Background technique [0002] XLPE cables have excellent electrical, mechanical and physical and chemical properties, gradually replacing overhead lines, and are widely used in power transmission systems. The formation of cable defects is due to the fact that cables are generally installed in relatively harsh environments, such as pipes, tunnels, cable trenches or directly buried underground, affected by temperature, oil quality, microorganisms, etc., as well as incorrect installation and manufacturing defects caused. The electrical stress is relatively concentrated at the break of the insulation shield in the cable joint and the terminal, which is prone to failure. According to the survey, the vicinity of the joints of XLPE distribution cables is a prone point of failure, an...
Claims
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IPC IPC(8): G01R31/12G01R31/08
CPCG01R31/1272G01R31/083
Inventor 王超吴春芳甄威扬王利国黄兢诗肖佳朋黄韬陈云郝艳捧陈彦文成延庭
Owner JIANGMEN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID