A small partner traveled to the United States to find out: How can the poles on both sides of the road be wood? There are not only country lanes, but even San Francisco, Los Angeles, Las Vegas, New York, Washington… These familiar bustling cities can be seen everywhere. industrial machinery
On the other side of the ocean, we said that long after the reform and opening up, bathed in the spring breeze, the wooden poles only exist in the memories of parents’ generations (by accidentally exposing their age)… now there are cement rods everywhere, Steel rods, most of them have not seen wood poles after 90’s and 80’s! However, why is the United States, a veteran developed country, still using such “old antiques” on a large scale? industrial machinery
There are several possible causes for the existence of wood poles. Everyone can let go of your free brain and discuss exactly what is justified.
Probable reason: The tree is presumptuous
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According to data from 2016, the forest area in the United States is approximately 3.03 million square kilometers, accounting for 30% of the country’s land area. It ranks fourth in the world and far exceeds the fifth highest in China (1.82 million square kilometers forest).
There are many forests and more trees are suitable for poles. So, pick a tree tall enough to go to the branches and leaves, peeled, soaked in tar cooking, high temperature and pressure will be pressed into the antiseptic agent, and then part of the surface of the wood embedded in the ground slightly burned, is the root pole. Local materials, low cost. industrial machinery
Take a look at how their wooden poles are made
Possible reasons: The grid is built early and the facilities are old
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In the United States, we rarely see new buildings, and there is no scene of construction. The U.S. infrastructure was built on a large scale in the 50s to 60s of the last century. It is currently aging and the power system is no exception.
At about 4:30 pm on August 14th, 2003 at US Eastern Time, power supplies to the cities of Toronto, Ottawa and other cities in New York, Detroit, Cleveland, and the United States suddenly interrupted and lasted for 29 hours. After the blackout occurred, when U.S. President George W. Bush inspected Santa Monica, the U.S. electricity supply network was “old and old.” Richardson, former US energy minister, also said that the U.S. power system is still at the level of the third world countries, and the U.S. needs a new power grid.
So, in this old grid territory, there are so many antique poles that are reasonable. industrial machinery
Probable causes: U.S. poles can not be changed
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What kind of network nostalgia, pole antiques, affecting the city, the old on the exchange is not so simple! To update the U.S. grid infrastructure, investment is astronomical. The American Electric Power Research Institute based in California estimates that it needs 50 to 100 billion U.S. dollars.
The government’s funds come from taxpayers. The government’s public expenditures are subject to deliberation by the parliament and democratic voting. When you go to trial, you know… The result is usually: The city budget is already tight. Since it can be used, why should it be updated? industrial machinery
Possible reasons: Low voltage lines, easy to set up wooden poles
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According to statistics, in August 2016, the U.S. terminal used 375.8 billion kwh of electricity, an increase of 4.7% year-on-year. Among them, households used electricity of 155.9 billion kwh, accounting for 41.47% of total electricity consumption; industrial electricity consumption of 83.3 billion kwh, only accounted for 22.65% of total electricity consumption.
Obviously, residential electricity accounts for the bulk, coupled with sparsely populated land in the United States and residents living scattered, so the local grid has the characteristics of light-duty transmission lines with long distances. From the aspect of weight, many local lines have low voltage levels, light loads, and the corresponding weight of the wires is light, and the wooden poles can withstand them. On the operational level, such a long line, the wooden poles are of light weight. Flexibility, ease of erection, and ease of shifting.
Therefore, combining the aforementioned low-cost options, the U.S. power company’s preference for wood poles is also understandable. industrial machinery