Abrasion-resistant, high-temperature, and high-pressure resistant flexible water pipes for long-distance extinguishing of mountain fires on transmission lines

Abstract

The invention relates to a wear-resistant, high-temperature, and high-pressure resistant flexible water pipe for long-distance extinguishing of mountain fires in power transmission lines. The water pipe includes three layers from inside to outside, the innermost layer is a polyurethane-PVC composite material layer, and the middle layer is a synthetic fiber layer. The outermost layer is a polyester cotton layer, the middle layer and the outermost layer are braided by thin ropes, and the innermost layer and the middle layer are bonded together; the polyurethane-PVC composite material layer consists of 15 to 20 parts by mass It is prepared by compounding thermoplastic polyurethane, 62-72 parts of PVC, 8-12 parts of DOP, 1-5 parts of heat stabilizer and 1-2 parts of copper salt. The water pipe of the present invention has strong pressure bearing capacity and meets the transmission pressure requirements required for fire extinguishing of mountain fires and high mountains in power transmission lines; the inner tank is made of polyurethane-PVC composite material to prevent corrosion of high-efficiency fire extinguishing fluid, and improve the mechanical properties and service life of the water pipe. The outer layer of polyester cotton has good high temperature resistance and flame retardancy, which prevents the water pipe from being burned in a high temperature fire.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of mountain fires in power transmission lines, and in particular relates to a wear-resistant, high-temperature, high-pressure and high-pressure resistant flexible water pipe for long-distance extinguishing of mountain fires in power transmission lines. Background technique [0002] In recent years, wildfires near transmission lines have frequently caused line trips, seriously affecting the safe and stable operation of the power grid. Putting out fires in power grids is the most direct and effective technical means to prevent transmission lines from tripping due to wildfires. However, since the power transmission line site is located on a high mountain of more than 100 meters, and the slope is steep and the road is dangerous, vehicles cannot reach it. Therefore, it is necessary to use high-pressure water pipes to transport water to the site of the mountain fire for long-distance fire...

AI Technical Summary

Problems solved by technology

However, since the transmission line site is located on a high mountain over 100 meters, and the slope is steep and the road is dangerous, vehicles cannot reach it. Therefore, it is necessary to use high-pressure water pipes to transport water to the site of the mountain fire for long-distance fire extinguishing, and the pressure is usually as high as 15 MPa.

[0003] Therefore, the prevention and control of mountain fires on transmission lines uses high-pressure fire extinguishing devices, but the existing common fire-fighting water pipes are used in conjunction with the following problems: (1) water resources are scarce near the mountain fire point, and the standard diameter of ordinary fire-fighting water distribution pipes is 40mm. The large amount of water is a serious waste of water resources, and the utilization rate of fire water is low; (2) The location of mountain fires is usually relatively high, and high-pressure fire extinguishing devices must be used for fire water transportation. The pressure capacity is not enough, and if it is used in a high-pressure situation, it will burst and leak; (3) Since the fire extinguishing fluid used in the mountain fire fire extinguishing equipment of transmission lines has weak acidity and alkalinity, ordinary fire hoses are mostly made of rubber or PVC and other materials, which have poor acid and alkali resistance , and the smoothness is not good. Although the polyurethane material has good acid and alkali resistance, the price is relatively expensive; (4) The high-pressure water pipe needs to be bent, connected, collected and stored on site, and requires good flexibility. Performance, adding steel wire or other metal materials, or using hard rubber, are difficult to bend, and it is inconvenient to bend the water pipe when extinguishing the fire and store it after extinguishing the fire

For example, the patent application CN105169609A uses a metal flame-retardant mesh layer to increase the pressure resistance, and the patent application CN 202017826U wraps a steel wire with high tensile strength on the outside of the water pipe to increase the pressure resistance. However, these products are not easy to bend and have poor flexibility. Meet the needs of long-distance fire fighting

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