A kind of gas-generating arc-extinguishing powder and its preparation method

A technology of arc extinguishing and powder, which is applied in the field of arc extinguishing powder, which can solve the problems of 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 internal pressure, and extinguish the arc. powerful effect

Active Publication Date: 2022-05-24
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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  • A kind of gas-generating arc-extinguishing powder and its preparation method
  • A kind of gas-generating arc-extinguishing powder and its preparation method
  • A kind of gas-generating arc-extinguishing powder and its preparation method

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preparation example Construction

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

[0042] It includes the following steps,

[0043](1) Weighing of materials: 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: The inorganic flame retardant powder of the required mass ratio and the fumed silica powder obtained in step 1) are mixed and granulated in a granulator to make The inorganic flame retardant powder is evenly coated on the surface of the fumed silica powder;

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

[0046] (4) Addition of organic flame retardant: The organic flame retardant powder of the required mass ra...

Embodiment 1

[0051] In a container, weigh the mass ratio of fumed silica powder: melamine modified urea-formaldehyde resin: magnesium silicate = 5wt%: 25wt%: 30wt% and add it to the container while stirring, then pour into the granulation The granulation is carried out in the machine, sieved through a 100-200-mesh sieve, and then placed in another clean container to obtain a semi-finished spherical powder 1. Then according to step (4), the mass ratio of semi-finished spherical powder 1:Al(OH) was added 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 After sieving out, powder 2 was obtained. Then the resorcinol:formaldehyde:melamine:ethanol:acid molar ratio of 1:3:0.1:11:0.06 was mixed by magnetic stirring and placed in an oven to gel to uniformly prepare melamine-doped resorcinol-formaldehyde ( N-RF) sol, and then ...

Embodiment 2

[0055] In a container, weigh the mass ratio of fumed silica: melamine modified urea-formaldehyde resin: magnesium silicate=10wt%:20wt%:20wt%, add it into the container while stirring, and then pour it into the granulator The granulation is carried out inside, and sieved through a 100-200-mesh sieve, and then placed in another clean container to obtain a semi-finished spherical powder 1. Then according to step (4), the mass ratio of semi-finished spherical powder 1:Mg(OH) was added 2 The ratio of 50wt%:15wt% is placed in the container containing the semi-finished spherical powder 1. After fully stirring and mixing with a glass rod, it is poured into the granulator again for secondary granulation, and passed through a 100-200 mesh screen. After sieving out, powder 2 is obtained, and then resorcinol: formaldehyde: melamine: ethanol: acid is mixed in a molar ratio of 1:4:0.08:10:0.07, stirred by magnetic force and placed in an oven to gel to uniformly prepare melamine mixed with ...

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Abstract

The invention relates to a gas-generating arc-extinguishing powder and a preparation method thereof. The gas-generating arc-extinguishing powder includes fumed silica nano-powder with a thermal conductivity equivalent to that of air, and is added with inorganic flame retardants, organic flame retardants, and modified melamine formaldehyde. Resin and silicate, to ensure that the arc extinguishing powder can release gas when the arc is generated, reduce the concentration of metal ions and the probability of collision, and produce a dissociation effect to quickly extinguish the arc. And ensure that the breaking capacity of the product meets the requirements of DC 300V400A.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(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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