Poles are basically round, so why not some other shape?

Telephone poles are actually a very common thing in daily life, and we find that most of them are round. This makes people wonder why telephone poles in life are basically round and not other shapes. In fact, in life, there is a reason why telephone poles are designed to be round rather than other shapes.

The main reason is that the round pole has better stress performance than other shapes of poles.

1. A brief description of telephone poles As we all know, telephone poles are very common things in our daily life. It is mainly used to ensure a safe distance between the wires and lightning cables that we see in our lives and the earth. From the perspective of power transmission, it is an important part of ensuring power transmission.

However, in real life, we will find that it is not only the poles that support the wires, but also some iron towers. However, we generally refer to poles and towers as poles. However, most of the power poles we see in our daily lives are cylindrical.

But in fact, if we look closely, we will find that these poles are not a cylindrical shape, because the shape of the poles is different from the top and bottom. In daily life, most of the poles are relatively small on the top, while the ones below are relatively large. Strictly speaking, the pole is a cone, and it is also a hollow cone.

Second, the reason why the poles are round However, in daily life, the reason why these poles are designed to be round is mainly because the circular design has certain benefits for the poles. First of all, the round pole has better stress performance than other shapes of poles. From a physical point of view, the load capacity of the pole itself is related to the size of its cross-section.

Whereas, a circular shape can better provide a larger cross-section. In addition, making the pole round will save more material.

3. OverviewUtility poles are designed to be round, mainly because the circle is very beneficial to poles.

The pole is basically very tall, and it is designed to be round to evenly cope with the wind direction caused by the height, and the pole will not break from the middle due to strong wind weather, which can reduce the wear rate.

Because the round shape can save materials, it is easy to make, and it looks more beautiful, so you don't feel that the shape is strange.

Utility poles are also part of the power transmission, and the round shape is more able to withstand the force and can save a lot of material.

The round wind resistance is strong, the manufacturing process is simple, and the transportation and operation are convenient. Telephone poles are poles that erect electric wires, which appeared in various villages, fields, roads, and streets, and were one of the important infrastructures in early China. In the early days, all kinds of electric poles started from wooden poles, and even included high-voltage wire poles that were not too high-voltage poles.

Later, due to the development of steel and reinforced concrete, as well as technical requirements, these two materials replaced most of the wooden poles. <

The round has strong wind resistance, simple manufacturing process, easy transportation and operation. Telephone poles are poles that erect electric wires, which appeared in various villages, fields, roads, and streets, and were one of the important infrastructures in early China. In the early days, all kinds of electric poles started from wooden poles, and even included high-voltage wire poles that were not too high-voltage poles.

Later, due to the development of steel and reinforced concrete, and technical requirements, these two materials allowed Jane to replace most of the wooden poles, and the suitable wood gradually became scarce. However, in some less developed places, the first line is also used to erect the first line, because the wooden pole is light in weight, easy to erect, and the load-bearing and tensile force of the first line is small, the wooden pole can be competent, and if the line is changed, it is also convenient to move the pole. So, there are also some wooden poles.

As we all know, the main function of the pole is to support the conductor and lightning rod, so that the conductor can keep a safe enough distance from the ground and other buildings.

Compared with the square rod, the round rod has the following advantages: when the cross-sectional area of the rod body is the same, the mechanical strength of the round rod is higher, the material is more economical, the round rod is easy to produce, the round rod has no edges and corners, it is not easy to weather, and the wind resistance of the round rod is small.

According to the characteristics of the cross-section from circle to polygon to square in the "Design Manual of High Voltage Transmission Lines in Electric Power Engineering (Second Edition)", it can be clearly seen that from circle to polygon to square, the product coefficient is getting larger and larger, and the area is also getting larger and larger. It is the ring-shaped pole that saves materials.

Round poles are relatively more beautiful, convenient and safe, and most people believe that round poles are more beautiful; In the manufacturing process, the concrete pole is processed by centrifugation, so the cross-section is circular; In terms of safety, if you hit an electric pole while walking, it will be even worse for your head.

Personally, I think that the cylindrical shape of the pole is for tensile resistance, easy construction, regardless of the direction when the pole is erected, and it is also resistant to strong winds.

In addition to the material, height, etc., the ability of the pole itself to bear the load is also closely related to the cross-sectional shape of the pole. The circular cross-section is symmetrical in all directions, isotropic and has a high bearing capacity. Therefore, the "resistance" of a round pole is stronger than that of a square pole.

Most of the electric poles in China are hollow circular concrete casts, and the same material is used to make a circular with the greatest strength. The pole is small at the top and large at the bottom, which is to fix the wire angle iron hoop at the upper end, which is easy to lock and not slide. The foundation is also stable.

This may have been the time when the Qing Dynasty was introduced to China from the West along with power generation equipment. The analogy of the pole park is good, because the garden can prevent a certain wind, but the square one blocks the wind, and the plane of the wind blows is several times larger than the park, so the square can not withstand the wind, from the perspective of transmission safety, and the park can withstand a certain wind, so the poles are round.

The bearing capacity of the round steel pipe is high, and the use of steel pipe rods in the city or places with landscape requirements The steel pipe tower is also more beautiful.

The force performance of the round pole is better than the square one, think about our common reinforced concrete pole, it stands there, to bear a lot of "unbearable weight of life", such as it supports the wire, insulator, etc. need to work hard, the pole itself still has weight, wind, rain, snow and ice will also bring external force, if the line is accidentally broken, there is a broken tension - just like you take the bus and suddenly brake, inertia may make you wrestle. In short, the various forces are also collectively referred to as "loads". These "loads" require poles to bear.