Manhole Cover Structure
Introduction:
A manhole cover is a removable plate that is used to cover an opening in a street or sidewalk, allowing access to an underground utility or sewer system. The structure of a manhole cover is designed to provide strength, durability, and safety. In this article, we will discuss the different components and features of a manhole cover structure and provide their English translations.
1. Frame (框架):
The frame is the outermost part of the manhole cover structure. It is a rigid, rectangular or circular frame that provides support and stability to the cover. The frame is usually made of cast iron or steel and is designed to withstand heavy loads and prevent the cover from sinking into the ground.
2. Cover (盖板):
The cover is the top part of the manhole cover structure. It is a flat, solid plate that sits on top of the frame and covers the opening. The cover is typically made of cast iron, steel, or composite materials and is designed to be slip-resistant and able to withstand heavy traffic loads.
3. Lifting Hole (提升孔):
The lifting hole is a small hole or opening in the cover that allows for easy lifting and removal of the manhole cover. It is usually located near the edge of the cover and is used with a special tool or hook to lift the cover safely.
4. Gasket (垫圈):
The gasket is a rubber or neoprene seal that is placed between the frame and the cover. It provides a watertight seal and prevents water, dirt, and debris from entering the manhole. The gasket also helps to reduce noise and vibration caused by traffic passing over the manhole cover.
5. Locking Device (锁定装置):
The locking device is a mechanism that secures the cover to the frame and prevents unauthorized access to the manhole. It can be a simple latch or a more complex locking system, depending on the level of security required. The locking device is usually made of stainless steel or other durable materials.
6. Ventilation Holes (通风孔):
Ventilation holes are small openings or perforations in the cover that allow for the exchange of air and gases between the underground utility or sewer system and the atmosphere. These holes help to prevent the buildup of harmful gases and odors inside the manhole.
7. Anti-Slip Surface (防滑表面):
The anti-slip surface is a textured or patterned surface on the cover that provides traction and prevents slipping, especially in wet or slippery conditions. It is usually achieved through the use of raised patterns, grooves, or coatings on the surface of the cover.
8. Load Rating (承载能力):
The load rating is a measure of the maximum weight or load that a manhole cover can safely support without deforming or breaking. It is usually expressed in terms of a static load or a dynamic load, depending on the intended use and location of the manhole cover.
Conclusion:
The manhole cover structure is a complex system that consists of various components and features designed to provide strength, durability, and safety. Understanding the English translations of these components can help in the communication and understanding of manhole cover specifications and requirements."