There are many manhole covers on the market today, and there are all kinds of them. According to the material, they can be divided into metal manhole covers: cast iron, ductile iron, bronze manhole covers, etc. As the application of inspection well technology continues to improve, its types and styles are also diverse Sex. Each area has a corresponding model and type in selection. The most indispensable for inspection wells is the manhole cover. When problems occur in the manhole cover, many problems follow. Therefore, choosing the right manhole cover is very important.
The size of each type of inspection well is different, and the corresponding cover size is also different. When selecting the manhole cover, it can be selected according to China's "Inspection Manhole Cover" standard. For example, when the standard size of a plastic inspection well is 700 (generally the size of the wellhead), the size of the manhole cover should be more than 750. This means that when we choose a manhole cover, its actual size is about 50mm larger than the size of the wellhead.
Specifications of cast iron manhole cover: heavy 400KN, general type 250KN, light type 125KN, square type manhole cover 500 * 500 B125 500 * 500 B125 600 * 600 B125 C250 700 * 700 B125 450 * 750 B125 C250 700 * 800 B125 The product specifications of cast iron manhole covers are different and can be customized according to customer needs.
1. The direction of the flat steel plate of the well cover is the direction of bearing (support), and the length L of the flat steel is determined according to the width of the trench.
2. Select the steel grille plate type according to the trench width and load requirements.
3.The remainder of the trench length is less than 1 meter.
4. The well cover is typeset according to the length of the trench, and a standard board width of 995mm is adopted in accordance with the processing modulus, with a gap of 5mm between the boards;
5. It is recommended to choose standard size well cover for design and construction, other specifications can be customized.