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There will be noise, high risk, botou tianlong casting
Ductile iron manhole cover solves this problem, reduces urban noise, and reduces the risk of road traffic. Now let's look at how to reduce it.
In botou tianlong casting ductile iron manhole cover, the rubber ring is usually installed between the socket and the socket to seal the gap, which is a seal that belongs to the static seal structure. The rubber ring is mainly subjected to cast iron pipe diameter and axial compression. The sealing of the flexible interface of cast iron pipe is realized by the high elasticity of the compression rubber ring.
The rubber ring of the nodular cast iron manhole has a very small stress relaxation, so it must be sealed within the expected time. As time goes on, the increase in stress relaxation decreases, and it can be speculated that even after a few decades, it can be adequately watertight and tight. Compression deformation is closely related to stress relaxation.
In botou tianlong casting ductile iron manhole cover, the determination of rubber ring compressive deformation is simple, and the result is good reproducibility and therefore has been taken seriously. Specified in the industry standard for J15, 70 ° C, h and promote after aging test, compression deformation rate should be lower than 30%, but most of today's product is about 10%.
The use of masking tape avoids direct contact between the dog and the manhole cover, thus reducing the sound of the contact, thus reducing the noise function. Botou tianlong casting adopts ductile iron manhole cover with shock proof rubber ring to make the vehicle noiseless and meet the environmental requirements. Beautify the city environment, spray black asphalt, make the product look bright and clean. Strict combination, can not produce jumps, stilts, ring, shift and other phenomena, noiseless, safe and reliable.
Create high-quality products, improve the image of the enterprise.