The main purpose of the anti-fall design is to prevent the manhole cover from accidentally shifting or falling off, causing pedestrians or vehicles to fall into the well. Especially in urban roads, public facilities and industrial areas, the anti-fall design of the manhole cover is very important, not only to ensure public safety, but also to avoid possible legal liability and economic losses.
Locking mechanism
Most manhole covers are equipped with a locking mechanism, which fixes the manhole cover to the wellhead by using special locks or bolts. These locking devices can effectively prevent the manhole cover from being removed by non-management personnel and reduce the risk of falling accidents. Common locking mechanisms include spiral locks, wedge locks and hinge locks.
Anti-slip surface design
Anti-slip surface design is to prevent pedestrians from slipping and causing falls. The surface of the manhole cover is designed with anti-slip textures, such as grids, bumps or stripes, which can increase friction and prevent pedestrians from slipping in wet or icy weather.
Matching of manhole cover and manhole seat
Some manhole covers are designed to be self-weight, and the friction between the weight of the manhole cover and the manhole seat is used to maintain stability. Other designs use buckles or hinges to securely fix the manhole cover to the manhole seat to prevent displacement under external forces.
Material selection
The choice of materials directly affects the anti-fall performance of the manhole cover. Materials such as ductile iron, composite materials and high-strength plastics are widely used in manhole cover manufacturing due to their high strength and durability. Choosing the right material can improve the overall stability of the manhole cover and prevent it from breaking or deforming under external forces, thereby reducing the risk of falling.
Automatic alarm system
Some modern manhole covers are also equipped with automatic alarm systems. When the manhole cover is illegally opened or displaced, the system will sound an alarm to remind relevant departments to take measures. This technology not only improves the safety of the manhole cover, but also responds quickly to emergencies and prevents accidental falls.
Anti-fall nets
Installing anti-fall nets at the wellhead is an effective protective measure. This net is usually made of high-strength metal or synthetic fiber and is installed under the manhole cover. It can withstand a large weight and prevent pedestrians or objects from falling into the well.
The anti-fall design of the manhole cover is an important part of urban infrastructure construction. By adopting a variety of technical means such as locking mechanism, anti-slip surface, material selection, automatic alarm system and anti-fall net, the safety of manhole covers can be effectively improved and the occurrence of falling accidents can be prevented.
