Clip type anti-stealing manhole cover

Abstract

The invention provides a jaw-locking-type theft-prevention inspection well lid, which comprises a well lid (1), a pawl axle (2), a pin (3) and a lid seat (4), both inner circle of the well lid (1) and the outer circle of the lid seat (4) are round, the positions close to the margins at the left and right sides of the central axis of the well lid (1) are respectively provided with a hole which is provided with an internal thread, the pawl axle (2) is arranged inside the hole, the left and right sides of the position which is close to the inner side of the central axis of the lid seat (4) and corresponds to the hole position of the well lid (1) are respectively provided with a through hole without a thread, the lower end surface of the hole is an inverted conical surface. After the well lid (1) is put into the inner circle of the lid seat (4), the jaws of the pawl axle (2) are pop out and are tightly locked on the conical surface at the lower end of the lid seat (4), the pin (3) in the pawl axle (2) can lock the jaws; the inspection well lid is simple in structure and low in manufacture cost, uses few components, the well lid and the lid seat are interlocked, therefore, the theft prevention effect is good, misplacement, overturn or falling are not caused, thus being applicable to various inspection wells.

Description

Technical field [0001] The invention relates to a card-type anti-theft inspection well cover, which belongs to a well cover device for hidden wells such as pipelines, ditches and lines. Background technique [0002] The various inspection shaft protective covers currently in use have different structures, functions and materials. However, the shape of the manhole cover has not changed. There are two commonly used types: round or with lugs. The circular manhole cover placed on the fast lane is very easy to break away from its original position with the momentum of the car, which brings great hidden dangers to vehicles and pedestrians. The unlocked inspection well cover is often stolen by thieves, and once the inspection well loses the protective well cover, it will become a trap immediately, bringing harm to vehicles and pedestrians. According to the patent bulletin, there are now hundreds of patent applications for inspection well protection covers with different structure...

AI Technical Summary

Problems solved by technology

According to the patent bulletin, there are now hundreds of patent applications for inspection well protection covers with different structures that have been authorized in China, but there are very few that are actually popularized and used in the market, simple in structure, safe and anti-theft, and easy to manufacture and promote. Therefore, Proposing and designing a new structure of inspection well protection cover has positive practical significance

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