Alarm device for monitoring poor contact of line grounding knife switch

Abstract

The invention discloses an alarm device for monitoring poor contact of a line grounding knife switch, and the device comprises a detection device, the bottom of the detection device is fixedly connected with two installation blocks, the two installation blocks are symmetrically distributed, and the bottom of the detection device is provided with a knife switch drive motor. Through cooperative use of a laser emitter, a reflector and an optical receiver, the rotating speed of a shaft rod is obtained according to the interval and frequency of light transmitted to the optical receiver, the rotating torque of a motor is increased after a connector is aged and corroded, the power of a disconnecting link driving motor is fixed according to the torque calculation formula T=9550*P / n, and when the torque is increased, the rotating speed is decreased; and when the rotating speed is lower than a set value, the controller can control the loudspeaker and the indicator lamp to work to give an alarm, potential safety hazards are avoided, the detection device is used for detecting induced electricity, and when the index is abnormal, the loudspeaker and the indicator lamp can be directly controlled to work through the controller, so that the comprehensive detection effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of grounding knife switches, and in particular relates to an alarm device for monitoring poor contact of a line grounding knife switch. Background technique [0002] The grounding switch refers to the grounding measures taken to ensure safety during the switching operation of the power system. It is operated manually or driven by a motor. During the switching operation of the power system, it is necessary to frequently operate the isolating switch and the grounding knife switch. Many measures have been taken, but it still fails to prevent the occurrence of similar misoperation accidents, especially the accident of electrified 110kV system grounding knife switch accident, which has caused great losses and social impact. [0003] At present, the judgment of the location of the substation grounding knife switch is only realized by on-site personnel through on-site observation. Due to reasons such as long-term ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an alarm device for monitoring the poor contact of the line grounding switch to solve the problem that the existing grounding switch proposed in the above background technology is in use. Realized through on-site observation, due to long-term corrosion, dirt, loose joints and other reasons, whether the contact is good, whether there is looseness during operation, and other issues can only be judged by experience, and some existing equipment only have detection sensors The function of electricity, which leads to the risk of inductive electric shock, and the problem of incomplete detection of existing equipment

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