How to prevent theft of ductile iron manhole covers

A lot of news reported that in a certain street, passers-by almost fell into the sewer, because the manhole cover was stolen and was not restored in time. The manhole cover uses anti-theft measures, but what is the actual method?

1. Its own anti-theft measures

The ductile iron manhole cover itself can be added with a metal watch strap, which can connect the well ring and the ductile iron manhole cover as a whole from the inside. The key anti-theft measures or manhole covers equipped with torsion springs will automatically have a protective cover after installation. Because of its function, the manhole cover cannot be opened without special tools. This kind of spring leaf is one of the anti-theft measures.

2. There are also some anti-theft manhole covers made of newly designed anti-theft locks and keys made of high-strength, anti-embroidery copper. The anti-theft locks are corroded during daily use, making it impossible to open the manhole covers. The new five-proof two-layer nodular cast iron manhole cover adopts the integrated design of the manhole cover and the well circle, and the turntable-type hardware lock is installed, which has the function of anti-theft.

3. Anti-theft of raw materials

Anti-theft of raw materials is very likely that many new customers are not very familiar with it. Can pig iron raw materials also be anti-theft? The answer is without a doubt. Because the current ductile iron manhole cover is different from the original cast iron material, the current material is added with ductile iron material, and the manhole cover added with ductile iron material has no recycling value.

4. Mechanical equipment anti-theft

Regardless of whether there was an anti-theft lock in the past, anti-theft measures can be easily added now. For example, a small hole can be quietly drilled on the manhole cover to install a mechanical anti-theft lock. In the past, only professional tools can be used to open the manhole cover, so this kind of anti-theft measure is very convenient and feasible, and the cost is very cheap.

In addition, you can also use the following methods:

1, for the rope connection method.

2. It is the door hinge connection method.

These two methods cannot integrate the well cover and the well circle lock, which is very easy to open, and the rope and door hinge can be broken with a drill.