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Easily manufactured arc-extinguishing flame-resistant explosion-proof type piezoresistor

A varistor, varistor technology, applied in varistor, overvoltage protection resistor, resistor and other directions, can solve the problem of varistor body shell selection, etc., to prevent arcing phenomenon, high strength , good flexibility

Inactive Publication Date: 2008-05-07
李炬 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned prior art solutions, there is no special selection of the material of the shell covering the piezoresistor body, so further research is needed to optimize the product structure, simplify the manufacturing process, The role of saving production materials and reducing product production costs

Method used

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  • Easily manufactured arc-extinguishing flame-resistant explosion-proof type piezoresistor
  • Easily manufactured arc-extinguishing flame-resistant explosion-proof type piezoresistor
  • Easily manufactured arc-extinguishing flame-resistant explosion-proof type piezoresistor

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Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1: As shown in Figures 1 to 4, the piezoresistor in this embodiment has a housing 1 and a piezoresistor body contained in the housing, and the inner wall of the housing 1 and the piezoresistor body There is a gap between the outer walls to form a housing chamber, and the housing chamber is filled with insulating non-combustible material to form an insulating non-combustible material layer 2. The varistor body has a pressure-sensitive ceramic substrate 3, a first lead-out electrode 4 and a second Two lead-out electrodes 5 are separately provided with two internal electrodes 6, 7 on the surface of the pressure-sensitive ceramic substrate 3, and the first lead-out electrode 4 and the second lead-out electrode 5 are respectively connected to all the inner electrodes on the surface of the pressure-sensitive ceramic substrate. The two internal electrodes 6, 7 are electrically connected, and the first lead-out electrode 4 and the second lead-out electrode 5 of the pi...

Embodiment 2

[0044] Embodiment 2: As shown in Figures 5 to 8, the piezoresistor in this embodiment is similar to Embodiment 1, the difference is that in this embodiment, there is a device at the exhaust port 10 that can be opened under the impact of high-pressure gas. The exhaust port sealing structure. In this embodiment, the above-mentioned exhaust port sealing structure is a sealing sheet 11 (the sealing sheet 11 in this example is an aluminum foil sheet) that is pasted on the housing and seals the exhaust port 10 .

Embodiment 3

[0045] Embodiment 3: As shown in Figures 9-13, the piezoresistor in this embodiment is similar to Embodiment 2, the difference is that in this embodiment, the varistor located between the two internal electrodes 6, 7 The surface portion of the pressure-sensitive ceramic substrate (ie, only the edge portion of the pressure-sensitive ceramic substrate 3 in this example) is provided with an insulating coating 9 . Here, the above-mentioned insulating wrapping layer 9 is a wrapping layer made of epoxy resin.

[0046] In addition, in this embodiment, an insulating coating 12 is fixedly provided on the shell wall (here, the inner wall of the shell) of the shell made of the metal material. The insulating non-combustible material layer 2 provided in this embodiment is an insulating non-combustible fiber layer. Here, the insulating non-combustible fiber layer is an asbestos fiber layer made of asbestos fibers.

[0047] In this embodiment, an exhaust port 10 is also provided, and an ex...

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PUM

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Abstract

The invention relates to an arc extinguishing, flame retardant and explosion-proof piezoresistor which is easy to make, comprising a housing and a piezoresistor body positioned in the housing. The invention is characterized in that: a gap is positioned between the inner wall of the housing and the outer wall of the piezoresistor body, forming an admitting cavity; an insulated incombustible material is filled in the admitting cavity, forming a layer of insulated incombustible material; the piezoresistor body is provided with a pressure sensitivity ceramic substrate, a first extraction electrode and a second extraction electrode; two inner electrodes are positioned separately on the surface of the pressure sensitive ceramic substrate; the first extraction electrode and the second extraction electrode are conductively connected with the two inner electrodes on the surface of the pressure sensitive ceramic substrate; both the first extraction electrode and the second extraction electrode of the pieziresistor body pass through the layer of the insulated incombustible material, extending outside the housing, and the housing is a metal housing made of metal material. The invention has the advantages of improving the anti-burst and flame retardation performance of the products, facilitating to improve the integral performance and quality of the products.

Description

technical field [0001] The invention relates to a piezoresistor, in particular to an arc-extinguishing, flame-retardant and explosion-proof piezoresistor which is easy to manufacture. Background technique [0002] As a surge protection component, varistors are widely used in various electronic devices. During use, it is found that when the external surge energy exceeds the withstand capacity of the varistors, the varistors will be broken down and short-circuited. In the actual circuit, the varistor is often connected between the live line and the neutral line of the power supply. When a short circuit occurs, the instantaneous energy is very large, and local high temperature will be generated at the breakdown damage, which may wrap the outside of the varistor ceramic substrate. The insulating and moisture-proof wrapping layer (usually made of organic materials such as epoxy resin as the main material) ignites, and in severe cases, it may cause fires in electrical equipment su...

Claims

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Application Information

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IPC IPC(8): H01C7/10H01C7/12H01C1/02H01C1/028H01C1/03
Inventor 李炬敬履伟谭宜成
Owner 李炬