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Insulating material electric resistance experiment plate electrode device for providing dynamic pressure and insulating material electric resistance experiment method

A technology of insulating materials and flat electrodes, applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as aging of rubber materials, difficulty in installing cable accessories, and affecting the electrical resistance of the interface, so as to avoid friction and ensure smoothness and accuracy, the effect of guaranteeing accuracy and uniformity

Inactive Publication Date: 2020-02-28
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The high-voltage power cable accessories are the weak link of the high-voltage cable system. The high-voltage cable accessories use rubber as the reinforced insulation material. During the installation of the cable accessories, the reinforced insulation material of the cable accessories generates a tight force through its own deformation, forming a gap with the main insulation of the cable. Generally speaking, if the interface pressure is too small, there will be an air gap in the interface between the double-layer media, which will seriously affect the electrical resistance of the interface. If the pressure is too high, it will bring difficulties to the installation of cable accessories. , at the same time, the rubber material may also age due to long-term exposure to excessive pressure

Method used

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  • Insulating material electric resistance experiment plate electrode device for providing dynamic pressure and insulating material electric resistance experiment method
  • Insulating material electric resistance experiment plate electrode device for providing dynamic pressure and insulating material electric resistance experiment method
  • Insulating material electric resistance experiment plate electrode device for providing dynamic pressure and insulating material electric resistance experiment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Combining Figure 1-Figure 4 , a flat plate electrode device for an insulating material electric resistance experiment that provides dynamic pressure in this embodiment includes a stepping motor 1, a fixed bracket 2, a large gear 3, a small gear 4, a spring, a ground electrode 6, a polymer sample 7, High voltage pole 8, insulating gasket 9, piezoelectric sensor 10, multiple auxiliary support guide rods 11-1, main support guide rod 11-2, bearing 12, upper epoxy board 13-1, middle epoxy board 13-2 , lower epoxy plate 13-3, hex nut 14, oil tank 15, signal transmission line 16, A / D conversion module, computer and stepper motor control module; Described auxiliary support guide rod 11-1 and main support guide rod 11- 2 all adopt stainless steel screw rods; the insulating gasket 9 adopts a silicon rubber gasket; the piezoelectric sensor 10 is a thin film piezoelectric sensor;

[0048] The lower ends of the plurality of auxiliary support guide rods 11-1 are fixedly ...

Embodiment 2

[0054] Example 2: Combining Figure 1-Figure 4 , for an insulating material electric resistance test method that provides dynamic pressure in this embodiment, the method is realized by relying on the flat plate electrode device for insulating material electric resistance test described in Example 1.

[0055] Taking the breakdown experiment of a polymer insulation sample under a fixed pressure as an example, the specific operation steps are as follows:

[0056] Step 1, add simethicone oil into the oil tank 15, just cover the upper surface of the ground electrode 6, place the prepared circular polymer sample 7 with a thickness of 50 μm between the ground electrode 6 and the high voltage pole 8, and connect After wiring, turn on the computer control terminal and start the communication;

[0057] Step 2: Input the preset pressure of the sample at the computer control terminal, and control the stepping motor 1 rotor to drive the small gear 4 to rotate through the stepping motor co...

Embodiment 3

[0061] Example 3: Binding Figure 1-Figure 4 , for an insulating material electric resistance test method that provides dynamic pressure in this embodiment, the method is realized by relying on the flat plate electrode device for insulating material electric resistance test described in Example 1.

[0062] Taking the electrical aging experiment of polymer insulation samples under dynamic pressure as an example, the specific operation steps are as follows:

[0063] Step 1, add simethicone oil into the oil tank 15, cover the upper surface of the ground electrode 6, place the prepared polymer sample 7 between the ground electrode 6 and the high voltage pole 8, connect the control and feedback loop, and open Computer control terminal, start communication;

[0064] Step 2: Set the periodic change law of the pressure of the polymer sample 7 on the computer control end, each cycle is defined as two stages of boosting and depressurizing, and the boosting process increases from 0 MPa ...

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Abstract

The invention discloses an insulating material electric resistance experiment plate electrode device for providing dynamic pressure and an insulating material electric resistance experiment method, belongs to the technical field of electrical insulating material dielectric property testing, and fills the blank of a dynamic pressure experiment technology. The device comprises a stepping motor, a gear, an elastic element, a ground electrode, a high-voltage electrode, an insulating spacer, a piezoelectric sensor, a supporting guide rod, an epoxy plate, an oil tank, an A / D conversion module, a computer and a stepping motor control module. The computer control end controls the stepping motor to drive the gear to rotate through the stepping motor control module, the length of the spring is adjusted so as to provide constant pressure or continuously changed pressure set according to a program, the piezoelectric sensor below the ground electrode is transmitted to the A / D conversion module through the signal transmission line, and the A / D conversion module uploads a signal to the computer for displaying the pressure at the control end of the computer in real time and forming a complete feedback control loop. According to the invention, the electrical resistance test of the polymer insulating material under the condition of constant or dynamic pressure change is realized.

Description

technical field [0001] The invention relates to an electrode device and an experimental method for a polymer insulating material electric resistance test, in particular to a flat plate electrode device and an experimental method for an insulating material electric resistance test that provides dynamic pressure, and belongs to the technical field of dielectric property testing of electric insulating materials. Background technique [0002] The high-voltage power cable accessories are the weak link of the high-voltage cable system. The high-voltage cable accessories use rubber as the reinforced insulation material. During the installation of the cable accessories, the reinforced insulation material of the cable accessories generates a tight force through its own deformation, forming a gap with the main insulation of the cable. Generally speaking, if the interface pressure is too small, there will be an air gap in the interface between the double-layer media, which will seriousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/16
CPCG01R31/1263G01R31/16
Inventor 胡巍赵洪牛越李春阳
Owner HARBIN UNIV OF SCI & TECH
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