New pattern manhole cover lock

Abstract

The invention patent provides a well cover fastening device which is a well cover lock. The lock is characterized in that: two symmetrical ides under a well cover is provided with an auxiliary lock tongue and a main lock; the auxiliary lock tongue is a fixed lock; when the well cover is laid down, the auxiliary lock tongue automatically hooks a well cover base; the main lock at the opposite end is arranged under a key hole of the well cover; a main lock tongue is arranged inside the main lock; a rack is arranged on the main lock tongue; the lock can be opened only with a special key; the structure of the key is as follows: the front of the key is provided with a lock head arranged on a key shaft; a guide hole column and a spring are arranged in the middle of the key shaft; the guide hole column is provided with an eccentric hole; a handle is arranged on the guide hole column; a key head can be sent to an unlocking position by lifting up the guide hole column; the key head meshes with the rack of the main lock tongue; the main lock tongue can be moved to an unlocking or locking position by putting down the guide hole column and rotating the handle, so as to form a well cover anti-installation lock.

Description

New manhole cover lock technical field The patent of the present invention relates to a fastening device for underground pipeline inlet and outlet pavement well covers, in particular to a mechanical fastening device for underground pipeline inlet and outlet well covers. Background technique Most of the existing underground pipeline manhole covers on the pavement are made of cast iron materials. Compared with cement and composite manhole covers with patented design, they have many advantages in terms of economy and performance. However, cast iron manhole covers are often used illegally due to their recycling value People steal and sell them, leaving the well uncovered, causing safety hazards to passers-by and vehicles, and frequent car crashes and deaths. In fact, some of them were lost because the car overturned the manhole cover, or it was not the manhole cover, but the property such as electric olives in the well. Therefore, it is very necessary to put a lock on the und...

AI Technical Summary

Problems solved by technology

Some patent solutions now refer to the installation of combination locks. Due to the harsh environment in the well, it is not easy to use, and at the same time, the price is high and it is difficult to promote.

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