It is definitely not normal for ductile iron manhole covers to make abnormal noises. The noise is likely to be caused by damage to the internal parts of the manhole cover or the looseness of the manhole cover. Many people do not pay attention to this kind of noise, because many ductile ink manhole covers now have some anti-drop functions, but without this function, the noise of the manhole cover will cause safety problems, so it must be It should be dealt with in time. The following small series will give you a detailed explanation of the method of noise reduction.
1. Use a lathe to make a groove on the well ring, and install a shock-absorbing rubber block in the groove to absorb shock and eliminate noise. In addition, there will be three buckles in the manhole cover, and the well ring can be fastened when it is on the cover, which has a stable effect of eliminating noise.
Second, the requirements to be met after lifting and tightening:
1. Ensure that the equipment complies with relevant product specifications and specifications, traffic loads, and is stable with the floor.
2. The base connection between the ductile manhole covers should be inseparable and firm, with anti-theft and anti-theft functions.
At present, when there is a problem with ductile manhole covers, that is, when there is noise, we have good reason to be concerned. If there is noise, it means that there will be a problem with the manhole cover and a warning message will be generated. We hope that we can pay attention to this situation when using it, and maintain it on time during inspection, so as to prevent small losses from making big mistakes.
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