The shaft cover is divided into two parts, the outer cover of the well and the inner buckle. 1. The inner buckle can prevent the fall of the well cover. The circular outer cover can not be dropped from the inner well in any angle, which greatly ensures the safety.
Two. The manhole cover to prevent the contacting ring, which requires the manhole cover and the well ring face, directly on the T type rubber strip, Killing with Kindness noise.
Three。 Of course, it is also anti skid, the surface of the shaft cover uses the convex 3mm pattern, which is to prevent slippery and avoid the accident。
Four. To prevent displacement, the well ring reserves four rivet bolt holes, with 90 degree uniform distribution, each using 4 anchor bolts, eliminates the shift in the road construction process for mechanical rolling occurs, and played a certain security role.
Five, the seismic protection of the well cover is set up to U trough at the mouth of the well ring. The T type synthetic rubber bar is embedded in the U groove, and it plays a cushioning role in the contact process between the manhole cover and the well ring, so as to reduce the vibration force.
Six. Because the ductile iron double layer cover is often stolen, there are many safety accidents, so the anti-theft has become one of the standards for the cover of the well.
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