Preparation method of explosion-proof cable trough box

Abstract

The invention discloses a preparation method of an explosion-proof cable trough box. The method is characterized in that the method is characterized by comprising the following steps, the explosion-proof cable trough box is calculated according to the weight, 100 parts of magnesium oxide, 60-65 parts of magnesium sulfate and 55-60 parts of water are used as reaction raw materials, 0.8 to 1.6 partsof citric acid monohydrate, 0.5 to 1 part of sodium citrate, 0.2 to 1 part of organic silicon and calcium stearate are used as modification auxiliary agents, 5-10 parts of bentonite, 12-28 parts of coal ash and 18-28 parts of talcum powder are used as filling materials to prepare slurry, then the slurry, low-alkali glass fiber grey cloth and non-woven fabric are rolled and cut into an inorganic nonmetal shell, and a metal layer is compounded on the inner wall of the formed shell. The explosion-proof cable trough box prepared by the invention has the advantages that (1) the explosion-proof cable trough box is safe and environment-friendly, and the formaldehyde emission is as low as 0.1 ml / L, (2) the mechanical strength is high, the breaking strength reaches 88.4 MPa or above, and the bearing capacity can reach 13000KN or above, (3) excellent physical and chemical properties, and (4) excellent fireproof and explosion-proof performance is achieved, the fireproof performance reaches the A1 level, the fire endurance can reach 4 h, and deformation and decomposition do not occur at the flame temperature of 1500 DEG C.

Description

technical field [0001] The invention relates to the technical field of power cables and channel materials, in particular to a method for preparing an explosion-proof cable trough. Background technique [0002] With the rapid development of China's national economy, China's cable popularization projects have spread throughout every city. More and more cable projects concentrate cables in cable trenches or cable wells. However, with the popularization of power cable projects, cable accidents The rate has also increased, and a large number of facts have proved that most of the cable accidents are related to cable accessories. Due to the quality and installation process, once the cable explodes, it will destroy other cables parallel in the same ditch, or it will cause a cable fire and cause irreparable losses to the entire power system. [0003] The commonly used explosion-proof groove boxes for high-voltage cables such as power grid systems, tunnels, and trenches are mostly us...

AI Technical Summary

Problems solved by technology

Due to the quality and installation process, once the cable explodes, it will destroy other cables parallel in the same ditch, or it will cause a cable fire and cause irreparable losses to the entire power system.

[0003] The commonly used explosion-proof groove boxes for high-voltage cables such as power grid systems, tunnels, and trenches are mostly used for cable intermediate joints, and most of them are made of glass fiber, glass steel or stainless steel. When used in a humid environment for a long time, the strength attenuation is serious, the cable will explode when it is damp, and the box is easy to expand when heated

Explosion-proof tank boxes made of metal materials such as stainless steel are prone to oxidation and rust in humid environments, and are easy to soften and deform when exposed to high temperatures, resulting in damage to performance and poor heat insulation performance, resulting in prolonged maintenance time and increased loss

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