Cast iron manhole covers make abnormal noise. Of course, this is an abnormal situation. The noise is most likely caused by the damage of internal parts of the manhole covers or the noise caused by the looseness of the manhole covers. Many people do not pay attention to this kind of noise because many manhole covers now have some anti falling functions, but

This is not with this function, the sound of cast iron well cover will not cause any kind of safety problems, we must do a good job in time, the following small series for you to do a detailed description.

Methods to eliminate noise:

1. The noise factor is inseparable from the manhole cover and road bite. It is necessary to plane the originally not very sharp well ring according to the numerical control processing, so that it can be closely connected with the well ring, and then remove the noise due to vibration.

2. A concave groove is opened in the well ring by the lathe, and the damping rubber block is installed in the concave groove to avoid vibration and noise. In addition, there are three clasps inside the manhole cover, which can be buckled up when the cover is closed. The well ring has a stable effect to remove noise.

2、 Regulations to be met after lifting and tightening:

1. Ensure that the equipment meets the relevant product specifications and traffic load specifications, and keep stable with the floor.

2. The connection between the two bases of the manhole cover should be inseparable and firm, with the function of anti-theft.

When there is a problem with the manhole cover, that is, there is a noise, our concern is very good. It is not a safety problem. If there is a noise, it indicates that there will be a problem with the manhole cover, and a kind of early warning information will be generated. We hope that we can pay attention to this situation when we use it, check and repair it on time, and prevent small loss and big loss.