Anti-theft alarm device of inspection well cover

Abstract

The invention discloses an anti-theft alarm device of an inspection well cover. The anti-theft alarm device comprises a magnet detection device and a controller which are installed on a well wall. The magnet detection device comprises a fixing ring and a magnet moving part; the fixing ring is used for fixing the inspection well cover; an insulating fixing buckle is arranged on the inner side of the fixing ring, and a through hole is formed in the insulating fixing buckle; the magnet moving part comprises a plastic cylinder, a round powerful magnet, a bottom conductive block and a metal connecting frame; the round powerful magnet is arranged at the top of the plastic cylinder; the bottom conductive block is arranged at the bottom of the plastic cylinder; the metal connecting frame is arranged at the position, corresponding to the lower portion of the bottom conductive block, of the inner side wall of the fixing ring; the bottom conductive block and the metal connecting frame are electrically connected with the controller; when the inspection well cover is closed, the circular powerful magnet tightly attracts the inspection well cover, the bottom conductive block is lifted, and at the moment, a circuit is in a switched-off state; and when the inspection well cover is lost, the bottom conductive block falls down and contacts with the metal connecting frame to switch on the circuit, a sound-light alarm is triggered, and alarm information is sent remotely.

Description

technical field [0001] The invention relates to the field of anti-theft technology for manhole covers, in particular to an anti-theft alarm device for manhole covers. Background technique [0002] There will be many underground pipelines in urban construction, such as sewers, underground gas pipelines, water pipelines, power pipelines, communication pipelines, national defense pipelines, etc. These pipelines must have an outlet leading to the ground every other section. Known as the inspection well, the inspection well mouth is usually flush with the ground, so a cover is needed, and the lid used to cover the inspection well is the inspection well cover. [0003] Manhole covers are mainly distributed on urban roads and sidewalks. If the manhole cover is missing due to being stolen, it will cause a series of unpredictable serious consequences. [0004] The existing manhole cover anti-theft alarm system is mainly inductive anti-theft or contact anti-theft, most of which are ...

AI Technical Summary

Problems solved by technology

If the manhole cover is missing due to theft, it will cause a series of unforeseen serious consequences

[0004] The existing manhole cover anti-theft alarm system is mainly inductive anti-theft or contact anti-theft, most of which are combined with some sensors and spring pressure blocks, pin safety locks and GPS and other anti-theft devices, the anti-theft effect is not obvious enough, and such as GPS and the like The components need to work continuously for a long time, which is not conducive to the endurance of the circuit. The above-mentioned devices have too many components and the maintenance cost is too high

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