Author:Site Editor Publish Time: 2020-11-05 Origin:Site
When people talk about round manhole covers, they will definitely discuss the particularity of the round shape. Because it can be rolled, it is convenient for workers to carry. And the round manhole cover does not have the problem of the longest diagonal. Its diameter is the same in any direction, and the manhole cover will not fall into the manhole, which is very safe. This is indeed the advantage and advantage of the round manhole cover. The round manhole covers are so good, Why not make all the manhole covers round? We can see square manhole covers everywhere in our lives. Why is this?
In fact, the square manhole cover is also difficult to fall into the manhole. If you install or move it yourself, you will know that its mass is not light. If you want to make it fall into the manhole, you must lift it up, turn it at a certain angle, and then push it into the manhole.
The function of the manhole cover is to cover the manhole to prevent people or objects from falling in. The manhole needs people to pass through, so we have almost never seen a square manhole, because the round manhole is more convenient for people to pass through and withstand even pressure . Nor will the existence of edges and corners cause people to pass through a narrow space and be injured. So our common manhole are all cylindrical. Therefore, all manhole covers must be round. Even if you cover a square manhole cover on a cylindrical manhole, the manhole cover will not fall into the manhole. But no one will do it, because it is completely unnecessary. And the square manhole cover should cover the round wellhead, so the shortest diameter of the square should not be less than the diameter of the round hole, so the square manhole cover will use much more materials than the round manhole cover.
Under the premise of the same drainage volume, the circular drainage port requires less material than the rectangular manhole cover, so the circular manhole cover is lighter and easier to move. And you can roll the round manhole cover and move it easily.
Installation and disassembly, if you need to move the manhole cover frequently, and the size and load-bearing capacity of the manhole cover are relatively high, and the manhole cover is relatively heavier, then the round manhole cover is easier to install than the square manhole cover. It has no corners and can be placed at any angle.
For the floor with ceramic tiles and floor tiles, a hidden square manhole cap is required. The common ones are square. For cutting floor tiles and installation, the square is obviously more practical and easier to operate.
If you need to open the manhole cover frequently to view or check, the round manhole cover is not as good as the square manhole cover. When the square manhole cover is opened face-to-face, the side of the manhole cover in contact with the ground can play a supporting role, which is convenient for you to lift and check the internal situation. When you lift a round manhole cover on one side, the opposite side touches only one point, and it slides easily, requiring more strength and skill. Of course, you can also choose a round manhole cover with a hinged flip design, so you don't have to worry about this problem. If you need to fully open the manhole cover, you still have to start from the weight point of view.
An advantage of the square manhole cover over the round manhole cover is that if the manhole cover is super large, the manhole cover is heavy and difficult to carry. The square well cover can be made in pieces and made into a combined type for easy opening. The round manhole cover does not work. And in transportation, the square manhole cover can make full use of the storage space of the transport vehicle. The round manhole cover cannot be effectively used in the four corners of the box. Similarly, if your house’s sewer or drain is at a corner or against a wall, using a square manhole cover will save space and be more beautiful and comfortable.
Round manhole covers are more suitable for deeper manhole, and square manhole covers are more suitable for shallow drainage and maintenance hole. Manhole covers covering different types of underground drainage pipes will be marked with words to indicate. Different countries have different regulations. The usual municipal rainwater and sewage are round, with composite manhole covers and other types of materials. Light to heavy duty can be selected according to driving conditions. Generally, rectangular manhole covers are used for cable channels. The square manhole covers have more space than round manhole covers of the same size, which is conducive to the placement of cable wiring pulleys during cable laying.
The different use of square manhole covers and round manhole covers is also convenient for people to distinguish. There are also some sealed manhole covers. We saw it when we walked on the road. Don't try to open the cover. Generally, there are electric facilities below, and there may be a risk of electric shock. At present, accompanied by the use of composite manhole covers, which are insulating materials, so you can walk on them with confidence.