How are transmission towers and power lines erected in the mountains?

1. The wire is erected on the high mountain cliff, and the transportation can only be carried manually, that is, "people pull the shoulder" to carry the wire.

2. Fix the wire spool, "pull" the wire, and pull the wire from this hill to that hill; However, it is easy to scratch the wire, and it is necessary to arrange people at various "obstruction points"; A lot of the time it was a platoon of people carrying the wires up the hill.

3. "Hanging on the insulating porcelain body on the iron tower" is to install pulleys on it, pull the wires with leads, and "pull" the wires up.

4. Tight wire, is to use a special tight wire tool or chain hoist, which is an anti-inverting ratchet; The wires are tightened little by little by hand, and finally fixed with the wire "fittings".

Pay-off steps: 1. Hang the pulley at the hanging point of the tower one by one.

2. It is a paramotor to put a Dyneema rope on the base tower one by one, or a thicker guide rope on the airship.

3. The aerial workers climb the tower and put the guide rope into the pulley at the hanging point.

4. The two ends of the pay-off section are placed with a traction machine on one side and a tension machine on the other. Starting from the Dyneema rope (Dyneema rope is a rope with very light weight and considerable breaking force), according to the number and weight of the wires, 8, 16 Dyneema ropes are pulled one by one, and then 16 Dyneema ropes are used to pull 13, 20, 26 and other specifications of wire ropes.

Because the Dyneema rope is easily damaged and the strength is reduced, a more reliable wire rope is required for the guide wire, although the wire rope is of greater quality), and then the wire rope of the appropriate specification is used to pull the guide wire through the pulley of each base tower, so as to complete the pay-off.

High-voltage linesIt is necessary to stay away from the residents.

A transmission tower is a tower-like structure used for power transmission. Their structural characteristics are that all kinds of tower types belong to space truss structures.

The members are mainly made of a single equilateral angle bar.

Or combined angle steel composition, the material generally uses Q235 (A3F) and Q345 (16Mn) two kinds of wax lap, the rod is connected with crude bolts, and the bolts are sheared.

Connect. The whole tower is composed of angle steel, connecting steel plates and bolts, and individual components such as tower feet are welded into an assembly by several steel plates, so they are hot-dip galvanized.

It is extremely convenient for anti-corrosion, transportation and construction erection. For towers with a call height of 60m or less, a foot peg is installed on one of the main materials of the tower.

In order to facilitate the construction workers to climb the tower operation.

Classify. According to its shape, it is generally divided into: wine glass type, cat head type, upper type, dry type and barrel type, according to the use: tension tower, straight line tower, corner tower, transposition tower (change the wire phase position tower), terminal tower and spanning tower, etc.

According to the use of towers in transmission lines, they can be divided into linear towers, tensile towers, corner towers, transposition towers, spanning towers, and terminal towers.

** The straight section of the road should be set up with straight line towers, wheel land tension towers, corner towers should be set up at the turning point of the transmission line, higher crossing towers should be set up on both sides of the crossed crossings, transposition towers should be set up at certain distances to balance the impedance of the three conductors, and terminal towers should be set up at the junction of the transmission line and the substation architecture.

This is because the voltage of the transmission lines is very high, and they must be erected high in the air for safety. These transmission lines are called high-voltage transmission lines.

Electricity is generated by the rubber flow through the power lines, which consumes electrical energy, and this heat is lost to the surrounding air and wasted. During the conveying process, electricity is consumed.

Reducing heat loss as much as possible is a fundamental problem that needs to be solved for long-distance delayed power transmission.