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National Testing Standards for Ductile Iron Manhole Covers

National Testing Standards for Ductile Iron Manhole Covers

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  • Time of issue:2016-01-13
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(Summary description)With the rapid development of cities and imperfect municipal infrastructure, manhole covers have been stolen and broken many times in major cities across the country. The tragedies of citizens accidentally falling into manholes and falling to death have caused huge losses to the country and individuals. , The new generation of bayonet type ductile iron anti-theft manhole cover produced by our company prevents the occurrence of the above-mentioned accidents. The product has multiple functions such as anti-vibration, anti-sound, anti-theft, anti-skid, anti-shift and anti-breakage.

National Testing Standards for Ductile Iron Manhole Covers

(Summary description)With the rapid development of cities and imperfect municipal infrastructure, manhole covers have been stolen and broken many times in major cities across the country. The tragedies of citizens accidentally falling into manholes and falling to death have caused huge losses to the country and individuals. , The new generation of bayonet type ductile iron anti-theft manhole cover produced by our company prevents the occurrence of the above-mentioned accidents. The product has multiple functions such as anti-vibration, anti-sound, anti-theft, anti-skid, anti-shift and anti-breakage.

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2016-01-13
  • Views:0
Information

With the rapid development of cities and imperfect municipal infrastructure, manhole covers have been stolen and broken many times in major cities across the country. The tragedies of citizens accidentally falling into manholes and falling to death have caused huge losses to the country and individuals. , The new generation of bayonet type ductile iron anti-theft manhole cover produced by our company prevents the occurrence of the above-mentioned accidents. The product has multiple functions such as anti-vibration, anti-sound, anti-theft, anti-skid, anti-shift and anti-breakage.

  

1) Anti-vibration: By setting a U-shaped groove at the stop of the well circle, using T-shaped synthetic rubber strips, embedded in the U-shaped groove, in the process of contact between the well cover and the well circle, it can buffer and reduce the 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 through the shaft fixing shaft. The inner wall of the other end is fixed with a pin body to prevent theft. When the manhole cover is opened, place 90 The manhole cover can be removed when the temperature is high, which is convenient for construction. The concealed lock adopts nylon bushing, which will never 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 convex 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) Release damage: This is the biggest feature of ductile iron manhole covers. Heavy ductile iron manhole covers can bear 36T/60T, and light ones can bear 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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