Anti-theft well lid and special unlocking device thereof

Abstract

The invention discloses an anti-theft well lid and a special unlocking device thereof. The anti-theft well lid comprises a base, a well lid body and a locking device, at least two drainage holes are formed in the well lid body, the locking device comprises locking wheels which are rotationally connected to the bottom of the well lid body and are in one-to-one-correspondence with the drainage holesand locking pieces arranged on the locking wheels, and locking grooves corresponding to the locking pieces are formed in the inner wall of the base; and the locking wheels are provided with rotatingholes which are the same as the drainage holes in shape and size and coincide with the drainage holes. According to the anti-theft well lid and the special unlocking device thereof, the locking deviceis arranged under the well lid body, and the rotating holes coincide with the drainage holes, so that a camouflage effect is achieved when the well lid body is viewed from the outer side of the welllid body, and invisibility of the locking device is enhanced; the special unlocking device of the anti-theft well lid comprises a shell, a gear set arranged in the shell and rotating rods arranged atthe bottom of the gear set, and the end parts of the rotating rods are provided with rotating parts cooperating with the rotating holes; and both the locking wheels can be rotated at the same time through the gear set and the rotating parts, operation is simple and convenient, and furthermore, operation can be completed by using a single hand.

Description

technical field [0001] The invention relates to a manhole cover, in particular to an anti-theft manhole cover and a special unlocking device thereof. Background technique [0002] At present, the transmission lines buried in the ground are all provided with maintenance wells, and inspection well covers are installed on the maintenance wells. The inspection well cover is usually composed of a base fixed on the base of the manhole and an upper cover installed on the base. There are two main installation structures between the base and the upper cover: one is the cover-opening structure, and the upper cover can be removed from the base. Uncover and completely separate from the base; the other is a clamshell structure, the upper cover and the base are connected together in a hinged manner, and the upper cover can be opened or closed by rotating along the hinge axis. In order to prevent the inspection well cover from being stolen, measures such as installing welding pieces at th...

AI Technical Summary

Problems solved by technology

[0004] Although the pentagonal bolt is special, there is no special pentagonal bolt opening tool on the market, but the keyhole is set on the surface of the manhole cover, and others can easily observe the specific fixing structure, and then it is not difficult to make a simple tool for matching according to the shape of the bolt, and Easy to be damaged, difficult to achieve anti-theft performance

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