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球墨铸铁井盖上的C250是什么意思,有什么含义吗?

来源:http://www.jnwszy.com添加时间:2021-08-25 17:50:59

球墨井盖上的C250是什么意思,有什么含义吗?

What does C250 on the nodular well cover mean and what does it mean?

球墨井盖是球墨铸铁产品的一种,球墨铸铁通过球化和孕育处理得到球状石墨,有效地提高了铸铁的机械性能,特别是提高了塑性和韧性,从而得到比碳钢还高的强度。球墨铸铁是20世纪五十年代发展起来的一种高强度铸铁材料,其综合性能接近于钢,正是基于其优异的性能,已成功地用于铸造一些受力复杂,强度、韧性、耐磨性要求较高的零件。球墨铸铁已迅速发展为仅次于灰铸铁的、应用十分广泛的铸铁材料。所谓“以铁代钢”,主要指球墨铸铁。

Nodular well cover is a kind of nodular cast iron. Nodular graphite is obtained from nodular cast iron through spheroidization and inoculation, which effectively improves the mechanical properties of cast iron, especially the plasticity and toughness, so as to obtain higher strength than carbon steel. Nodular cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive properties are close to steel. Based on its excellent properties, it has been successfully used to cast some parts with complex stress and high requirements for strength, toughness and wear resistance. Nodular cast iron has rapidly developed into a widely used cast iron material second only to gray cast iron. The so-called "replacing steel with iron" mainly refers to nodular cast iron.

球墨铸铁井盖中的C250是什么含义呢?

What is the meaning of C250 in nodular cast iron manhole cover?

球墨铸铁井盖C250级指的是:承重约25吨的井盖球墨铸铁井盖,250:实验承载250KN(千牛)。按照行业标准, 此雨水井盖用在次干道的机动车道上。

Nodular cast iron manhole cover C250 refers to the manhole cover with a load of about 25 tons, and the nodular cast iron manhole cover with an experimental load of 250kN (KN). According to industry standards, this rainwater well cover is used on the motorway of the secondary trunk road.

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球墨铸铁井盖一般分为圆形和方形,在市区的路政方面,一般采用圆形,因为 圆形的井盖不易倾斜,能够较好的保护好行人和车辆的安全。使用圆形,主要是考虑到圆形的井盖通过其圆心的每条直径长度都是一样的,这样如果井盖被经过的车辆轧起时,因为不论如何轧起,其直径都会比下面的井口略宽,井盖不会掉到井口里去。

Nodular cast iron manhole covers are generally divided into round and square. In terms of urban road administration, circular manhole covers are generally used, because circular manhole covers are not easy to tilt, which can better protect the safety of pedestrians and vehicles. The use of circular covers mainly takes into account that the length of each diameter of the circular well cover passing through its center is the same. In this way, if the well cover is rolled up by passing vehicles, no matter how it is rolled up, its diameter will be slightly wider than the wellhead below, and the well cover will not fall into the wellhead.

而如果采用方形,因为方形的对角线明显长于其每条边长,这样的井盖被轧起时,很容易沿井口的对角线方向掉进井中,造成安全隐患。如果井口做成圆形或明显小于井盖,方形的井盖就不会掉进井中。这里就牵涉到一个材料的利用和节约的问题。井口的使用取决于井口的大小,如果非要在上面安装个面积远远大于井口的方形井盖,那么材料的利用和实用价值自然没有直接使用圆形的井盖更有效,既节约井盖的材料,也保证了井口的安全。而在乡下和电缆井利用的,一般采用方形,这样可以更好地预防雨水等液体的进入。

If the square is used, because the diagonal of the square is obviously longer than the length of each side, when the well cover is rolled up, it is easy to fall into the well along the diagonal direction of the wellhead, resulting in potential safety hazards. If the wellhead is round or significantly smaller than the well cover, the square well cover will not fall into the well. This involves the problem of maximum utilization and saving of materials. The use of the wellhead depends on the size of the wellhead. If it is necessary to install a square well cover with an area much larger than the wellhead, the utilization and practical value of the material is naturally more effective than using the circular well cover directly, which not only saves the material of the well cover, but also ensures the safety of the wellhead. In rural areas and cable wells, square is generally used, which can better prevent the entry of rainwater and other liquids.


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