Use of rail transit pipe sold in Yunnan

Hot dip galvanized rail crossing pipes are used in tunnels. According to the actual requirements, the external anti-corrosion needs to be in the form of hot dip galvanizing. The important reason is that the tunnel environment in the mountains determines that hot dip galvanized rail crossing pipes need to be embedded in concrete. Because of the protective effect of cement, hot dip galvanized rail crossing pipes are not easy to be corroded by rain, which is mainly due to the carbonization of concrete. The carbonation environment of cement concrete is the action of carbon dioxide and calcium hydroxide in the cement stone to generate calcium carbonate and water. Carbonization reduces the alkalinity of the concrete, weakens the protective effect of the concrete on the hot-dip galvanized rail crossing pipe, and may lead to corrosion of the rail crossing pipe. Therefore, the hot-dip galvanized finger seam steel pipe is generally used to make the rail crossing pipe, which is generally made of carbon steel Q235B, and its hardness, compressive strength and bending strength can meet the requirements. Make preparations for maintenance later. Taking the railway tunnel as an example, if the line is crossed, the hot-dip galvanized rail crossing pipe is required, because the hot-dip galvanized rail crossing pipe has good plasticity, because the embedded cement concrete needs to be squeezed by the cement concrete, and is not easy to deform and bend.

As for the technical disclosure of the laying of non-magnetic rail crossing pipes, generally hot-dip galvanized pipes are used as raw materials, and then demagnetization and demagnetization process is carried out. First, let's talk about the construction process of non-magnetic rail crossing pipes: 1. Check the drawings; 2. Material preparation; 3. Rolling before construction; 4. Trench excavation; 5. Laying of rail crossing pipe; 6. Concrete packaging; 7. Backfilling.

In order to meet the requirements of power, communication, signal and other requirements, the communication and signal rail crossing pipes are set at the entrance and exit of the tunnel at a distance of 2m from the portal mileage, and the power rail crossing pipes are set at the entrance and exit of the tunnel at a distance of 5m into the tunnel. Construction requirements: 1. The connection at the bend of steel pipe shall be smooth and smooth. 2. Several steel wires shall be passed through each steel pipe, and the steel wire shall extend beyond both ends of the steel pipe by no less than 500mm. 3. All pipes for communication and signal cables and all pipes for power cables are galvanized steel pipes. 4. The rail crossing pipelines are set below the central ditch, and the two ends are set at an inclination of 45 degrees. The bending radius of the steel pipe is not less than 1m.