How to reduce the noise of ductile iron manhole covers?

How to reduce the noise of ductile iron manhole covers?

The noise of ductile iron manhole covers is because the gap between the manhole cover and the base is relatively large, or the locking device between the cover and the base has been loosened, which causes noise when vehicles pass by, especially in the community or late at night.

Cast iron manhole covers are used more and more frequently in our lives. They are very simple in shape, resistant to chemical corrosion and beautiful in appearance. Here are some tips on noise reduction methods for cast iron manhole covers.

Ductile iron manhole covers are noisy, and new cast iron fittings can solve the noise problem. The rubber ring in the cast iron pipe fitting is usually installed between the socket and the plug, and its function is to seal the gap. The sealing of this static sealing structure is very important in cast iron pipe fittings, and its radial and axial compression is very important. The sealing of the flexible joint of cast iron pipe fittings is achieved by the high elasticity of the compressed rubber ring. The stress tightness of the rubber ring discussed in the manhole cover machine will be related to the air tightness within a predetermined time.

It can be speculated that as time goes by, the growth rate of the stress tightness of the ductile iron manhole cover will decrease, and after the stress tightness increases, complete watertightness and tightness can be obtained. Compression deformation is closely related to stress tightness.

The measurement method for the rubber ring compression deformation of the ductile iron manhole cover is simple. The compression deformation rate should be less than 3/10, but most of the current products are around 1/10. The use of the anti-noise belt prevents the direct conflict between the police dog and the manhole cover, and the sound is greatly reduced after contact, which plays a role in noise reduction. The cast manhole cover adopts anti-shock rubber ring, so that the vehicle can pass through without noise, which meets the requirements of environmental protection. Spraying black asphalt, the surface of the product is bright, clean, noiseless and reliable.

The installation method of ductile iron manhole covers should be appropriate and reasonable. First of all, the foundation part cannot be suspended in the air, and then the error range of the corresponding height between the cover and the road surface should be within 3mm. If it exceeds this range, it is unqualified. After installation, the site should be cleaned up and prompt signs should be set up. Vehicles are prohibited for seven days. With its unique product advantages, manhole covers quickly occupied the market, which not only promoted the development of the industry, but also changed people's travel safety.