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A kind of preparation method of explosion-proof cable box

An explosion-proof cable and tank box technology, applied in the direction of cable joints, etc., can solve the problems of easy softening and deformation, easy expansion of the tank box when heated, and strength attenuation, etc., to achieve excellent impermeability and waterproof ability and corrosion resistance, excellent fire and explosion-proof performance, The effect of reducing the possibility of explosion

Active Publication Date: 2022-03-04
镁晶建筑科技(重庆)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A kind of preparation method of explosion-proof cable box
  • A kind of preparation method of explosion-proof cable box
  • A kind of preparation method of explosion-proof cable box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of an explosion-proof cable trough box is carried out according to the following scheme:

[0033] Step (1): 62 parts of magnesium sulfate and 58 parts of water are mixed and stirred according to specific gravity to make magnesium sulfate solution, which is sent into a mixer for use;

[0034] Step (2): Weigh 100 parts of magnesium oxide and 0.6 parts of organic silicon into the batching bin in turn, transport them to the mixer and stir with the magnesium sulfate solution for 18 minutes at a stirring speed of 90 r / min;

[0035] Step (3): Add 8 parts of bentonite, 20 parts of fly ash, 25 parts of talcum powder, 1 part of citric acid monohydrate, 0.8 parts of sodium citrate, 1.5 parts of calcium stearate and stir for 12 minutes at 110 r / min to form Slurry, wherein the talcum powder is a mixture of talcum powder A with a particle diameter of 6 μm and a talcum powder B with a particle diameter of 9 μm, and the composition mass ratio is talcum powder A: talc...

Embodiment 2

[0048] A preparation method of an explosion-proof cable trough box is carried out according to the following scheme:

[0049] Step (1): 60 parts of magnesium sulfate and 55 parts of water are mixed and stirred according to the specific gravity to make a magnesium sulfate solution, which is sent into a mixer for use;

[0050] Step (2): Weigh 100 parts of magnesium oxide and 1 part of organic silicon into the batching bin in turn, transport them to the mixer and stir with the magnesium sulfate solution for 20 minutes at a stirring rate of 80 r / min;

[0051] Step (3): Add 5 parts of bentonite, 28 parts of fly ash, 18 parts of talcum powder, 0.8 part of citric acid monohydrate, 1 part of sodium citrate, 0.5 part of calcium stearate and stir for 15 minutes at 120 r / min to form Slurry, wherein the talcum powder is a mixture of talcum powder A with a particle diameter of D=5.5 μm and a talcum powder B with a particle diameter of 10 μm, and the composition mass ratio is talcum powder ...

Embodiment 3

[0057] A preparation method of an explosion-proof cable trough box is carried out according to the following scheme:

[0058] Step (1): 65 parts of magnesium sulfate and 60 parts of water are mixed and stirred according to the specific gravity to make a magnesium sulfate solution, which is sent into a mixer for use;

[0059] Step (2): Weigh 100 parts of magnesia and 0.2 parts of organic silicon and add them to the batching bin in turn, transport them to the mixer and stir with the magnesium sulfate solution for 15 minutes at a stirring speed of 100 r / min;

[0060] Step (3): Add 10 parts of bentonite, 12 parts of fly ash, 28 parts of talcum powder, 1.6 parts of citric acid monohydrate, 0.5 parts of sodium citrate, 2.8 parts of calcium stearate and stir for 10 minutes at 100 r / min to form Slurry, wherein the talcum powder is a mixture of talcum powder A with a particle diameter of 5.8 μm and a talcum powder B with a particle diameter of 9 μm, and the composition mass ratio is ta...

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Abstract

A preparation method for an explosion-proof cable trough, characterized in that: the explosion-proof cable trough is calculated by weight, using 100 parts of magnesium oxide, 60-65 parts of magnesium sulfate and 55-60 parts of water as reaction raw materials, and 0.8-60 parts of water 1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate, 0.2-1 part of organic silicon and calcium stearate as modification additives, 5-10 parts of bentonite, 12-28 parts of fly ash, 18-28 parts Talc powder is used as filling material to prepare slurry, and then rolled together with low-alkali glass fiber gray cloth and non-woven fabric, cut into an inorganic non-metallic shell, and a metal layer is compounded on the inner wall of the formed shell. The explosion-proof cable trough box prepared by the present invention: (1) safe and environmentally friendly, the formaldehyde emission is as low as 0.1ml / L; (2) the mechanical strength is high, the flexural strength reaches more than 88.4MPa, and the bearing capacity can reach more than 13000KN; (3) Excellent physical and chemical properties; (4) Excellent fire-proof and explosion-proof performance, the fire-proof performance can reach A1 level, the fire-resistant limit can reach 4h, and it will not deform and decompose when it meets the flame temperature of 1500°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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/30H02G15/10C04B111/20C04B111/27C04B111/28
CPCC04B28/30H02G15/10C04B2111/00379C04B2111/00612C04B2111/27C04B2111/20C04B2111/28C04B2111/00844C04B2201/52C04B14/304C04B22/142C04B24/06C04B24/42C04B24/085C04B14/104C04B18/08C04B14/042
Inventor 董连勇李刚林华好
Owner 镁晶建筑科技(重庆)有限公司
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