CN206947077U - A kind of anti-explosion piezo-resistance - Google Patents

Abstract

The utility model discloses a kind of anti-explosion piezo-resistance,Including fire retardant cabinet and the MOV piezo-resistances being fixed in fire retardant cabinet,The fire retardant cabinet is made up of the inner casing and shell of column,The upper surface of the shell is provided with steam vent,The shell is using cavity structure and covers in outside inner casing the full encirclement formed to inner casing,The surface of the inner casing uses engraved structure,MOV piezo-resistances are installed with the lower surface of inner casing,The MOV piezo-resistances are by ZnO crystal grain,Grain boundary layer,Spinelle crystal grain forms,The ZnO crystal grain,Grain boundary layer,Spinelle crystal grain uses the network structure of connection in series-parallel composition,Also solid solution has micro Co in the ZnO crystal grain,Mn elements,MOV piezo-resistances crystal grain distribution after punching press for several times is uniform,The molten phenomenon that disappears seldom occurs,So as to reduce voltage amplitude variation of the impacting with high pressure to piezo-resistance,Extend the service life of piezo-resistance.

Description

A kind of anti-explosion piezo-resistance

Technical field

Piezo-resistance technical field is the utility model is related to, specially a kind of anti-explosion piezo-resistance.

Background technology

Piezoresistor as a kind of surge protector component widely apply with various electronic equipments, when extraneous surge energy When exceeding the tolerance of piezo-resistance rapidly, or when under extraneous surge energy repeated stock deterioration occurs for piezo-resistance When, piezo-resistance can breakdown short circuit, in actual circuit, piezo-resistance often produces localized hyperthermia, will may surround Housing outside it pops, particularly on the position of each bar seamed edge of housing side, it is easier to cracking phenomenon, and Present znr bears the performance of heavy current impact also than relatively low, the phenomenon of aging easily occurs, uses the longevity Order short.

Utility model content

To achieve the above object, the utility model provides following technical scheme：A kind of anti-explosion piezo-resistance, including fire retardant cabinet With the MOV piezo-resistances being fixed in fire retardant cabinet, the fire retardant cabinet is made up of the inner casing and shell of column, the shell it is upper Surface is provided with steam vent, and the shell is using cavity structure and covers in outside inner casing the full encirclement formed to inner casing, described interior The surface of shell uses engraved structure, MOV piezo-resistances is installed with the lower surface of inner casing, the MOV piezo-resistances are by ZnO Crystal grain, grain boundary layer, spinelle crystal grain composition, the ZnO crystal grain, grain boundary layer, spinelle crystal grain are netted using connection in series-parallel composition Structure, the ZnO crystal grain use resistivity as 0.001~0.1 Ω m, a diameter of 10~30 μm of ZnO crystal grain, and the ZnO is brilliant Also solid solution has micro Co, Mn element in grain.

As a kind of preferable technical scheme of the utility model, buffer fillings are additionally provided between the inner casing and shell Thing, the buffer fillings thing use the granular pattern insulation and moisture incombustible material of high temperature resistance and high strength.

As a kind of preferable technical scheme of the utility model, the lower end of the MOV piezo-resistances is additionally provided with multiple companies Pin is connect, the multiple connection pin is through fire retardant cabinet lower end and is symmetrically distributed on the lower surface of fire retardant cabinet.

As a kind of preferable technical scheme of the utility model, the spinelle crystal grain is answered using zinc oxide and antimony oxide Close oxide.

Compared with prior art, the beneficial effects of the utility model are：The anti-explosion piezo-resistance, by setting fire retardant cabinet, And fire retardant cabinet is arranged to inner casing and shell, the heat in the upper surface of shell using steam vent discharge enclosure interior, and Buffer fillings thing is additionally provided between inner casing and shell, explosion time occurs under piezo-resistance is impacted in extraneous surge energy, produces Raw gas is drained into buffer fillings nitride layer through inner casing, most discharges the external world through enclosure exhaust hole afterwards, passes through this steam vent water conservancy diversion Mode enables because thermal current caused by pressure responsive resistor failure high temperature obtains discharging to reduce the flame of inner casing in time, so as to keep away The naked light phenomenon in blast process is exempted from, and has used and be made up of ZnO crystal grain 9, grain boundary layer 8, the connection in series-parallel of spinelle crystal grain 10 The MOV piezo-resistances of network structure, after MOV internal grains are impacted for several times, its network structure is still maintained the statusquo, brilliant Grain is evenly distributed, and the molten phenomenon that disappears seldom occurs, so as to reduce voltage amplitude variation of the impacting with high pressure to piezo-resistance, prolongs The service life of piezo-resistance is grown.

Brief description of the drawings

Fig. 1 is the utility model structure diagram；

Fig. 2 is the utility model MOV piezo-resistance three-phase structure schematic diagrames.

In figure：1- fire retardant cabinets；2- shells；3- inner casings；4-MOV piezo-resistances；5- connection pins；6- buffer fillings things；7- Steam vent；8- grain boundary layers；9-ZnO crystal grain；10- spinelle crystal grain.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Embodiment：

Fig. 1 and Fig. 2 are referred to, the utility model provides a kind of technical scheme：A kind of anti-explosion piezo-resistance, including fire retardant cabinet 1 and the MOV piezo-resistances 4 that are fixed in fire retardant cabinet 1, the fire retardant cabinet 1 be made up of the inner casing 3 and shell 2 of column, it is described outer The upper surface of shell 2 is provided with steam vent 7, and the shell 2 uses cavity structure and covered in outside inner casing 3 and forms to the complete of inner casing 3 Surround, the surface of the inner casing 3 uses engraved structure, MOV piezo-resistances 4 are installed with the inner surface of inner casing 3, described MOV piezo-resistances 4 are made up of ZnO crystal grain 9, grain boundary layer 8, spinelle crystal grain 10, and the ZnO crystal grain 9, grain boundary layer 8, spinelle are brilliant For grain 10 using the network structures of connection in series-parallel composition, the ZnO crystal grain 9 uses resistivity as 0.001~0.1 Ω m, and a diameter of 10 ~30 μm of ZnO crystal grain, also solid solution has micro Co, Mn element in the ZnO crystal grain 9, and the grain boundary layer 8 is by several additives group Into, be additive enrichment region, be more than 108 Ω m in existing fringing field zone resistance rate, grain boundary layer is the root for producing pressure-sensitive character Source.In high electric field area, grain boundary layer conducting, the resistance of whole permittivity of zinc will be determined mainly by the bulk resistor of crystal grain.

Preferably, buffer fillings thing 6 is additionally provided between the inner casing 3 and shell 2, the buffer fillings thing 6 uses The granular pattern insulation and moisture incombustible material of high temperature resistance and high strength；The lower end of the MOV piezo-resistances 4 is additionally provided with multiple connections and drawn Pin 5, the multiple connection pin 5 is through the lower end of fire retardant cabinet 1 and is symmetrically distributed on the lower surface of fire retardant cabinet 1；The spinelle Crystal grain 10 is using zinc oxide and the composite oxides of antimony oxide.

Specifically used mode and advantage：The anti-explosion piezo-resistance, inner casing is arranged to by setting fire retardant cabinet, and by fire retardant cabinet And shell, the heat in the upper surface of shell using steam vent discharge enclosure interior, and also set up between inner casing and shell There is buffer fillings thing, when under the impact of extraneous surge energy explosion time occurs for piezo-resistance, caused gas is drained into through inner casing Buffer fillings nitride layer, the external world most is discharged through enclosure exhaust hole afterwards, by this steam vent diversion mode due to piezo-resistance Thermal current caused by failure high temperature can obtain discharging to reduce the flame of inner casing in time, so as to avoid the naked light in blast process Phenomenon, and use the pressure-sensitive electricity of MOV for the network structure being made up of ZnO crystal grain 9, grain boundary layer 8, the connection in series-parallel of spinelle crystal grain 10 Resistance, after MOV internal grains are impacted for several times, its network structure is still maintained the statusquo, and crystal grain distribution is uniform, can seldom be gone out Now disappear molten phenomenon, so as to reduce voltage amplitude variation of the impacting with high pressure to piezo-resistance, extends the use of piezo-resistance Life-span.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Claims (4)

1. A kind of 1. anti-explosion piezo-resistance, it is characterised in that：Including fire retardant cabinet（1）Be fixed on fire retardant cabinet（1）The pressure-sensitive electricity of interior MOV Resistance（4）, the fire retardant cabinet（1）By the inner casing of column（3）And shell（2）Composition, the shell（2）Upper surface be provided with row Stomata（7）, the shell（2）Using cavity structure and cover in inner casing（3）Outside form to inner casing（3）Full encirclement, it is described in Shell（3）Surface use engraved structure, in inner casing（3）Inner surface be installed with MOV piezo-resistances（4）, the MOV is pressure-sensitive Resistance（4）By ZnO crystal grain（9）, grain boundary layer（8）, spinelle crystal grain（10）Composition, the ZnO crystal grain（9）, grain boundary layer（8）, point Spar crystal grain（10）The network structure formed using connection in series-parallel, the ZnO crystal grain（9）Resistivity is used as 0.001~0.1 Ω M, a diameter of 10~30 μm of ZnO crystal grain, the ZnO crystal grain（9）In also solid solution have micro Co, Mn element.
2. A kind of 2. anti-explosion piezo-resistance according to claim 1, it is characterised in that：The inner casing（3）And shell（2）Between It is additionally provided with buffer fillings thing（6）, the buffer fillings thing（6）Using the granular pattern insulation and moisture not fuel wood of high temperature resistance and high strength Material.
3. A kind of 3. anti-explosion piezo-resistance according to claim 1, it is characterised in that：The MOV piezo-resistances（4）Lower end It is additionally provided with multiple connection pins（5）, the multiple connection pin（5）Through fire retardant cabinet（1）Lower end and it is symmetrically distributed in fire-retardant Shell（1）Lower surface on.
4. A kind of 4. anti-explosion piezo-resistance according to claim 1, it is characterised in that：The spinelle crystal grain（10）Using oxygen Change the composite oxides of zinc and antimony oxide.