Flashover locator detection unit shielding device

Abstract

The invention discloses a flashover locator detection unit shielding device. An existing detection unit is poor in interference signal shielding effect and prone to being affected by external interference and complex environments. The device comprises an outer shielding shell and an inner shielding box. The outer shielding shell is formed by butting an upper shell and a lower shell, and the bottom surfaces of the side walls of the upper shell and the lower shell are in matched step shapes; a main board and a plurality of channel plates are arranged in the shell; the main board is integrally arranged in a main board shielding box, and the electronic element of each channel board is arranged in the corresponding channel board shielding box. The main board shielding box and each channel board shielding box are box bodies made of copper foils. According to the invention, an inner and outer double-layer shielding structure is adopted, so that the detection unit has a double-shielding function, external interference signals can be greatly attenuated, the influence of an external complex environment is reduced, the interference signals are effectively removed, and the anti-interference performance is improved, so that the positioning of a partial discharge position is more accurate; and the device plays an important role in equipment detection of a power system.

Description

technical field [0001] The invention belongs to the technical field of electric equipment detection, and in particular relates to a shielding device for a detection unit of a flashover locator. Background technique [0002] During the operation of GIS equipment, due to factors such as overvoltage or the reduction of the insulation strength of the insulator itself, partial discharge may be caused, which poses a great threat to the safe operation of electrical equipment. The inspectors often use the flashover locator to detect and locate partial discharges, which provides a basis for the maintenance and troubleshooting of GIS equipment. [0003] The main part of the flashover locator is the detection unit, such as figure 1 As shown, the housing 11 in the detection unit is provided with a main board 12 for processing signals and a plurality of channel boards 13 for denoising, filtering, amplifying and other processing of signals, and the overall housing is an upper housing and...

AI Technical Summary

Problems solved by technology

[0004] It is not difficult to find that due to the hard material of aluminum alloy, no matter how excellent the butt joint process is, there will always be a small gap at the butt joint of the side wall, which affects the shielding effect

Moreover, the milling process is used, and the processing complexity is relatively high, which increases the production cost.

At the same time, the existing upper shell and the lower shell are butted on a single plane, and there are also gaps

The shell itself also has an external shielding function, and such gaps also affect the shielding effect

During the actual detection process, it was found that the interference signal shielding effect of the existing detection unit is not good, and it is easily affected by external interference and complex environments, which affects the detection of partial discharge signals and the accuracy of discharge position positioning. Therefore, a new kind of detection unit is urgently needed. technical solution to this problem

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