What are the significant advantages of ductile iron manhole covers?
2020-01-02
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Unique design of ductile iron manhole cover
- Categories:Common problem
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- Time of issue:2020-01-03
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(Summary description)The ductile iron manhole cover is made of medium ductile iron QT500-7. This material makes the manhole cover strong in compression, bending, impact resistance, heat resistance, cold resistance, abrasion resistance, acid and alkali resistance, aging resistance, and resistance to deformation. Features.
Unique design of ductile iron manhole cover
(Summary description)The ductile iron manhole cover is made of medium ductile iron QT500-7. This material makes the manhole cover strong in compression, bending, impact resistance, heat resistance, cold resistance, abrasion resistance, acid and alkali resistance, aging resistance, and resistance to deformation. Features.
- Categories:Common problem
- Author:
- Origin:
- Time of issue:2020-01-03
- Views:3
Information
The ductile iron manhole cover is made of medium ductile iron QT500-7. This material makes the manhole cover strong in compression, bending, impact resistance, heat resistance, cold resistance, abrasion resistance, acid and alkali resistance, aging resistance, and resistance to deformation. Features.
These characteristics make the service life of ductile iron manhole cover about 50 years.
The design of the ductile iron manhole cover is anti-vibration, anti-sound, anti-theft, anti-skid, anti-shift, anti-breakage and other functions.
1) Anti-vibration: U-shaped groove is set at the stop of the well circle, and T-shaped synthetic rubber strip is used to embed in the U-shaped groove. During the contact between the well cover and the well circle, it can buffer and reduce vibration .
2) Anti-noise: The contact occlusal surface of the well cover and the well ring directly acts on the T-shaped rubber strip to overcome the rigidity with softness and eliminate noise.
3) Anti-theft: On the outer ring of the manhole cover, a square groove protrudes. The split ring on the inner wall end of the manhole cover is connected to the manhole cover by the shaft fixing shaft. The manhole cover can be removed when the temperature is high, which is convenient for construction. The concealed lock adopts nylon bushing, does not rust, and is equipped with special tools to open, which is safe and reliable.
4) Anti-slip: The surface of the manhole cover adopts a raised 3mm pattern, which has a good anti-slip effect.
5) Anti-displacement: Four rivet bolt holes are reserved in the well circle, evenly distributed at 90 degrees. Each set uses 4 ground anchor bolts to avoid displacement due to mechanical rolling during road construction, and Played a certain anti-theft effect.
6) Anti-breakage: This is the characteristic of ductile iron manhole covers. Heavy ductile iron manhole covers can bear pressure of 36T/60T, and light ones can bear pressure of 21T. Even if the load pressure exceeds its limit, ductile iron manhole covers are not broken like ordinary cast iron manhole covers, but slightly deformed, which provides a certain degree of safety for cars and pedestrians.
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