Pit well cover with mechanical password locks and cam locking locating

Abstract

The invention relates to a pit well cover, in particular to a pit well cover with mechanical password locks and cam locking locating. The pit well cover comprises a well cover base, a well cover matched with the inner diameter of the well cover base and a mechanical password lock arranged on the well cover. A mounting sinking table is arranged on the inner wall of the well cover base. The well cover is arranged on the mounting sinking table. An inner boss which protrudes inwards is arranged on the inner wall of the well cover. A mounting locating groove is formed in the inner boss. A mounting locating protruding block which protrudes outwards is arranged on the outer edge wall of the well cover. The mounting locating protruding block is matched with the mounting locating groove. At least two sets of mechanical password locks are placed on the well cover on the opposite face of the mounting locating protruding block. A locking device is arranged on the well cover. The locking device locates the well cover and the well cover base in a locking mode through the cam. Through the structure, manufacturing cost is lowered, safety is improved, stability is enhanced, and the prying resistance and the anti-vibration performance are improved.

Description

technical field [0001] The invention relates to a pit cover, in particular to a cellar well cover with a mechanical combination lock and a cam locking position which reduces manufacturing cost, improves safety, enhances stability, improves anti-prying performance and improves anti-vibration performance. Background technique [0002] The cellar well lid that uses on the existing market is of a great variety, and the structure is also varied. The widely used metal manhole cover has its own value of recycling, and its anti-theft performance is considered in the design. However, with the international and domestic terrorist activities and the behavior and possibility of man-made damage to well facilities, it is necessary to prevent others from opening and entering the well at will. This crime prevention function has become more urgent. [0003] The metal manhole cover in the prior art includes a manhole cover seat, a manhole cover matched with the manhole cover seat, the ma...

AI Technical Summary

Problems solved by technology

The technical solution announced by the mechanical coded manhole cover adopts a coded lock device. Generally, at least three sets of the coded lock device are used to effectively prevent opening. However, during use, the gap between the manhole cover and the manhole cover seat is uneven It is easy to generate vibration, and noise will be generated when the vehicle passes by, and the stability will decrease with the passage of time; since the top surface of the combination wheel of the combination lock device and the contact surface of the well cover seat are relatively smooth, when the well cover is up about You can turn the lock cylinder by lifting it, and you can try to use the hand feeling to crack the password by turning the lock cylinder, which is less secure

[0005] In summary, the mechanical coded manhole cover of the prior art has low security, poor stability and poor vibration resistance

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