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Gas-producing arc extinguishing powder and preparation method thereof

An arc extinguishing and powder technology, which is applied in the manufacture of electrical components, fuses, circuits, etc., can solve problems such as difficulty in controlling the uniformity of filling density, fast heat dissipation, and great influence on the production area, so as to reduce the concentration of metal ions and the probability of collision, increase The effect of internal pressure and arc extinguishing ability is strong

Active Publication Date: 2021-09-24
NANJING SART SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, quartz sand has the following problems as a filler for fuses: as a mineral, quartz sand is greatly affected by the place of origin, and metal impurities such as iron are difficult to remove; the surface of quartz sand is rough, and it is difficult to control the uniformity of filling density during fuse assembly. Then affect the breaking effect; the thermal conductivity is large, and the heat dissipation is faster, making it difficult for the fuse to break low overload

Method used

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  • Gas-producing arc extinguishing powder and preparation method thereof
  • Gas-producing arc extinguishing powder and preparation method thereof
  • Gas-producing arc extinguishing powder and preparation method thereof

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preparation example Construction

[0041] And the preparation method of above-mentioned gas generation arc extinguishing powder can adopt following technical scheme:

[0042] Including the following steps,

[0043](1) Material weighing: Weigh various raw materials of the required quality according to the formula ratio for use;

[0044] (2) Addition of inorganic flame retardant in fumed silica powder: mix and granulate the fumed silica powder obtained in step 1) with the inorganic flame retardant powder of required mass ratio in a granulator, so that The inorganic flame retardant powder is evenly coated on the surface of the fumed silica powder;

[0045] (3) Addition of silicate: Mix and granulate the silicate powder with the required mass ratio and the coated powder obtained in step (2) in a granulator, so that the silicate powder is evenly coated on the powder body surface;

[0046] (4) Adding of organic flame retardant: Mix and granulate the organic flame retardant powder with the required mass ratio and t...

Embodiment 1

[0051] Weigh the mass ratio in a container as fumed silica powder: melamine modified urea-formaldehyde resin: magnesium silicate = 5wt%: 25wt%: 30wt% and add it to the container while stirring, then pour into granulation Granulate in the machine, sieve through a 100-200-mesh sieve, and place it in another clean container to obtain a semi-finished spherical powder 1. Then according to step (4) adding mass ratio is semi-finished spherical powder 1: Al (OH) 3 = 60wt%: 10wt% in the container containing the semi-finished spherical powder 1, fully stirred and mixed with a glass rod, poured into the granulator again for secondary granulation, and passed through a 100-200 mesh screen Powder 2 was obtained after sieving. Then resorcinol: formaldehyde: melamine: ethanol: acid in molar ratio 1:3:0.1:11:0.06 is mixed by magnetic force and placed in the oven to gel, evenly prepare melamine doped resorcinol-formaldehyde ( N-RF) sol, then grind it into powder with an agate mortar, screen o...

Embodiment 2

[0055] Weigh the mass ratio in a container as fumed silica: melamine modified urea-formaldehyde resin: magnesium silicate = 10wt%: 20wt%: 20wt% of the proportioning while stirring, join in the container, then pour into the granulator granulate in the container, sieve through a 100-200-mesh sieve, and place it in another clean container to obtain a semi-finished spherical powder 1. Then according to step (4) adding mass ratio is semi-finished spherical powder 1:Mg(OH) 2 =50wt%: 15wt% in the container containing the semi-finished spherical powder 1, fully stirred and mixed with a glass rod, poured into the granulator for secondary granulation, and passed through a 100-200 mesh screen After sieving, powder 2 was obtained, and then resorcinol: formaldehyde: melamine: ethanol: acid was mixed in a molar ratio of 1:4:0.08:10:0.07, stirred by magnetic force and placed in an oven to gel, and the melamine blend was evenly prepared. Miscellaneous resorcinol-formaldehyde (N-RF) sol is th...

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Abstract

The invention relates to gas-producing arc-extinguishing powder and a preparation method thereof. The gas-producing arc-extinguishing powder comprises fumed silica nano-powder with the heat conductivity coefficient equivalent to that of air, and an inorganic flame retardant, an organic flame retardant, modified melamino-formaldehyde resin and silicate are added so as to ensure that the arc-extinguishing powder can release gas when an electric arc is generated. The metal ion concentration and the collision probability are reduced, and a deionization effect is generated to quickly extinguish the arc. And the breaking capacity of the product is ensured to meet the DC 300V400A requirement.

Description

technical field [0001] The invention relates to an arc extinguishing powder which can be used for arc extinguishing of tubular fuses, in particular to an arc extinguishing powder with gas production effect and a preparation method of the arc extinguishing powder. Background technique [0002] Surface mount tubular miniature fuse products with a breaking capacity of DC300V400A and above generally need to be filled with arc extinguishing materials to extinguish the arc generated by the metal melt during overcurrent fusing and buffer the explosion at the moment of fusing The huge impact of pressure on the fuse case. [0003] In addition to generating a large amount of heat energy during the breaking process of the melt, there will also be two forms of pressure: the explosion pressure in the form of pulses generated at the moment of melt gasification and arcing, and the arcing pressure generated during the entire arcing period. Conventional arc extinguishing materials can gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/38H01H85/42H01H85/045H01H69/02
CPCH01H85/38H01H85/42H01H85/045H01H69/02H01H2085/388
Inventor 黄云周家兴
Owner NANJING SART SCI & TECH DEV
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