CN1677578A - Zinc-oxide resistor-piece side insulation package device and packing method - Google Patents
Zinc-oxide resistor-piece side insulation package device and packing method Download PDFInfo
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- CN1677578A CN1677578A CN 200510042622 CN200510042622A CN1677578A CN 1677578 A CN1677578 A CN 1677578A CN 200510042622 CN200510042622 CN 200510042622 CN 200510042622 A CN200510042622 A CN 200510042622A CN 1677578 A CN1677578 A CN 1677578A
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- zinc oxide
- resistance sheet
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- oxide resistance
- fluid bed
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Abstract
The packaging set comprises fluid bed and clamping apparatus on the fluid bed. The fluid bed includes upper box, lower box and distribution plate between the upper and lower box. Air in nozzle connected to air current control valve is on the lower box. The said clamping apparatus includes two pieces of grip holders. One holder is connected to rotating shaft. Located between two holders, V shaped mould is in use for placing resistance pieces of zinc oxide. Isolation layers are setup between two resistance pieces. The fluid bed loosens epoxy-insulating powder, keeps it in good condition, and preheats temperature of sidewall of resistance pieces above melting point of epoxy insulating powder. Heat deposition method is adopted for carrying out encapsulation. After thermofixation, excellent insulation protection layer is formed on side faces of resistance pieces of zinc oxide.
Description
Technical field
The present invention relates to a kind of insulation-encapsulated method of resistor disc, particularly a kind of Zinc-oxide resistor-piece side insulation packaging system and method for packing.
Background technology
In recent years; develop rapidly along with electric utility; overvoltage protection system for power equipment; the particularly research of zinc oxide arrester without gaps; obtained development at full speed; simultaneously its heavy current impact tolerance is had higher requirement, the heavy current impact tolerance is used for preparation property test, power-frequency voltage tolerance time attribute testing and the lightning arrester thermal stability test of the big electric current operating duty experiment of sampling test, strong thunder and lightning load lightning arrester operating duty test, switching impulse operating duty test.For the lightning arrester of nominal discharge current greater than the 5kA grade, the general requirement of its big electric current reaches 65kA, but because characteristic and the lateral protection material and the insulation-encapsulated method of big electric current, general zinc oxide resistance sheet does not all reach above requirement.
The method that lateral protection adopted of zinc oxide resistance sheet is at present: adopt liquid insulating material, for example 145 coat with lacquer, by the method for roller coating; be coated on the side of zinc oxide resistance sheet; place a period of time then, wait solvent evaporates wherein after, heating is cured again.Also can add a spot of filler therein, after insulating varnish stirs evenly, be coated with.The shortcoming of this method is: coating process can produce unwanted volatile, for example toluene, dimethylbenzene etc.; Because the rheological property of fluent material is difficult to control, the thickness of insulating material that is coated on Zinc-oxide resistor-piece side is even inadequately, directly has influence on its electric property; In addition, the density of liquid insulating material is far away from solid encapsulation material, and its electrical strength, anti-moisture performance and heat resistance are all relatively poor, so the through-flow 65kA that generally do not reach of its big electric current.Also having a kind of method is to adopt cryogenic glass powder, it is modulated at organic solvent, method by roller coating, be coated on the side of zinc oxide resistance sheet, place a period of time then, wait solvent evaporates wherein after, heat again, when glass dust melts, formed one deck glass glaze in the side of zinc oxide resistance sheet.The shortcoming of this method is: can produce unwanted volatile, for example toluene, dimethylbenzene etc. equally in the coating process; Because the rheological property of fluent material is difficult to control,, also will directly have influence on its electric property so it is even inadequately to be coated on the thickness of insulating material of Zinc-oxide resistor-piece side; In addition, when glass dust melted, its rheological property was difficult to control, and glass-glazed uniformity is relatively poor, so big electric current is through-flow does not generally still reach more than the 65kA for it.And the epoxy insulation powder has extremely good electrical insulation properties, its disruptive field intensity can reach more than the 35kV/mm, fabulous with the adhesive force of zinc oxide resistance sheet, water absorption rate is low, high temperature resistant (reaching 180 ℃), seal and solidification process in can not produce unwanted volatile, in melting process, have good rheological behavior, be widely used in the demanding electronic devices and components external insulation of the dielectric strength encapsulation technologies such as piezo-resistance, ceramic capacitor.But because the epoxy insulation powder is used for the technology and the method complexity of Zinc-oxide resistor-piece side protection, technical difficulty is big, can't realize encapsulation in batches.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, Zinc-oxide resistor-piece side insulation packaging system and method for packing are provided, the zinc oxide resistance sheet that adopts this device and method to make can tolerate high current impulse withstanding capability.
For achieving the above object, packaging system of the present invention comprises: comprise fluid bed and the anchor clamps that are installed on the fluid bed, be characterized in, fluid bed comprise upper box, the lower box of placing the epoxy insulation powder and be arranged on upper box and lower box between distribution grid, on lower box, also offer the suction nozzle that is connected with control damper, anchor clamps comprise the chuck that is arranged on both sides, upper box upper end, chuck is connected with rotating shaft, the V-type mould of placing zinc oxide resistance sheet is installed between chuck, and also is provided with separator between the adjacent zinc oxide resistance sheet; Also be provided with agitating device in the upper box; Also be provided with the spanner that is connected with chuck on the anchor clamps, and chuck is provided with spring; The diameter of chuck is identical with the diameter of zinc oxide resistance sheet.
The method for packing that the present invention adopts is: at first zinc oxide resistance sheet is heated to more than the fusing point of epoxy insulation powder through baking oven or continuous tunnel furnace; Zinc oxide resistance sheet after the heating is put into the V-type mould, and between two adjacent zinc oxide resistance sheets, separator is set, inwardly move spanner with the past post-tensioning of chuck, the V-type mould that zinc oxide resistance sheet is housed is packed in the chuck and chuck of anchor clamps, unclamp spanner, chuck clamps the zinc oxide resistance sheet of putting into the V-type mould under the effect of spring; Main air is divided into tiny air-flow after by control damper, suction nozzle and distribution grid, hold up and form fluidized state being placed on epoxy insulation powder in the upper box of fluid bed, simultaneously even fluidisation in the upper box of epoxy insulation powder in fluid bed under the effect of agitating device; To be immersed in by the zinc oxide resistance sheet that anchor clamps clip in the fluid bed that holds the epoxy insulation powder, the rotating shaft rotation makes zinc oxide resistance sheet along one to three week of axle center Rotating with Uniform, through the side of the zinc oxide resistance sheet of preheating with regard to uniform deposited last layer epoxy insulation powder, again with adhesion place between the zinc oxide resistance sheet after the scriber delineation encapsulation, zinc oxide resistance sheet is separated with separator, and zinc oxide resistance sheet is heating and curing at 130-160 ℃ gets final product then.
The present invention adopts fluidization that the epoxy insulation powder is fully loose; by air-flow regulation and control to fluid bed; make it keep good fluidized state; the zinc oxide resistance sheet that need is carried out lateral protection is preheating to earlier more than the fusing point of epoxy insulation powder; the method of applying by hot melt encapsulates then; through being heating and curing, the side of zinc oxide resistance sheet has just formed very good insulating protective layer.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention;
Fig. 2 is the structural representation of V-type mould 2 of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1,2, the present invention includes fluid bed 10 and the anchor clamps 3 that are installed on the fluid bed 10, fluid bed 10 comprises the upper box 11 of placing epoxy insulation powder 9, lower box 12 and be arranged on upper box 11 and lower box 12 between distribution grid 13, in upper box 11, also be provided with agitating device 16, on lower box 12, also offer the suction nozzle 14 that is connected with control damper 15, anchor clamps 3 comprise that the diameter with zinc oxide resistance sheet 1 that is arranged on both sides, upper box 11 upper end is identical, chuck 4,5, also be provided with the spanner 7 that is connected with chuck 5 on the anchor clamps 3, and on chuck 5, also be provided with spring 6, chuck 4 is connected with rotating shaft 17, the V-type mould 2 of placing zinc oxide resistance sheet 1 is installed between chuck 4 and chuck 5, and also is provided with separator 8 between the adjacent zinc oxide resistance sheet 1.
The present invention is in the Zinc-oxide resistor-piece side insulation encapsulation process, at first zinc oxide resistance sheet 1 is heated to more than the melting temperature of epoxy insulation powder through baking oven or continuous tunnel furnace, zinc oxide resistance sheet 1 after will heating is then put into V-type mould 2, and between two adjacent zinc oxide resistance sheets, install separator 8 additional, inwardly move spanner 7 with chuck 5 past post-tensionings, spring 6 inwardly compresses, with pack into the chuck 4 of anchor clamps 3 of the V-type mould 2 that zinc oxide resistance sheet 1 is housed, in 5, unclamp spanner 7, chuck 5 loosens, spring 6 resiliences, the zinc oxide resistance sheet 1 of V-type mould 2 is put in clamping, two chucks 4 of anchor clamps 3,5 diameter should be the same with the diameter of zinc oxide resistance sheet 1, can play the effect of shielding, prevents epoxy insulation powder 9 deposited end faces to zinc oxide resistance sheet 1.Enter the lower box 12 of fluid bed 10 through suction nozzle 14 through the compressed air that filters, again by behind the gas distribution grid 13, just be divided into countless tiny air-flows, 9 picking-ups of epoxy insulation powder, the epoxy insulation powder 9 that is placed in fluid bed 10 upper boxes 11 just become fluidized state.For preventing that epoxy insulation powder 9 from the ditch stream mode occurring at fluid mapper process, fluid bed 10 planted agents put an agitating device 16.15 controls of control damper door enter into the compressed air require of fluid bed 10, make epoxy insulation powder 9 even fluidisation in fluid bed.To be immersed in by the zinc oxide resistance sheet 1 that anchor clamps 3 clip in the fluid bed 10 that holds epoxy insulation powder 9, tumbler 17 rotations make zinc oxide resistance sheet 1 along the axle center Rotating with Uniform, control its rotary speed ((30-60) rad/min) simultaneously.Because epoxy insulation powder 9 even fluidisation in fluid bed 10, through the side of the zinc oxide resistance sheet 1 of preheating with regard to uniform deposited last layer epoxy insulation powder 9; Again with adhesion place between the resistor disc after the scriber delineation encapsulation; zinc oxide resistance sheet 1 is separated with separator 8; zinc oxide resistance sheet 1 after the encapsulation is heating and curing, so Zinc-oxide resistor-piece side has just formed the protective layer of function admirable, its heavy current impact tolerance reaches the above level of 65kA.
Claims (5)
1, the Zinc-oxide resistor-piece side insulation packaging system, comprise fluid bed [10] and be installed in anchor clamps [3] on the fluid bed [10], it is characterized in that: fluid bed [10] comprises the upper box [11] of placing epoxy insulation powder [9], lower box [12] and be arranged on upper box [11] and lower box [12] between distribution grid [13], on lower box [12], also offer the suction nozzle [14] that is connected with control damper [15], anchor clamps [3] comprise the chuck [4 that is arranged on both sides, upper box [11] upper end, 5], chuck [4] is connected with rotating shaft [17], the V-type mould [2] of placing zinc oxide resistance sheet [1] is installed between chuck [4] and chuck [5], and also is provided with separator [8] between the adjacent zinc oxide resistance sheet [1].
2, Zinc-oxide resistor-piece side insulation packaging system according to claim 1 is characterized in that: also be provided with agitating device [16] in the said upper box [11].
3, Zinc-oxide resistor-piece side insulation packaging system according to claim 1 is characterized in that: also be provided with the spanner [7] that is connected with chuck [5] on the said anchor clamps [3], and chuck [5] is provided with spring [6].
4, Zinc-oxide resistor-piece side insulation packaging system according to claim 1 is characterized in that: the diameter of said chuck [4] and chuck [5] is identical with the diameter of zinc oxide resistance sheet [1].
5, a kind of method for packing based on the described Zinc-oxide resistor-piece side insulation packaging system of claim 1 is characterized in that:
1) at first zinc oxide resistance sheet [1] is heated to more than the fusing point of epoxy insulation powder through baking oven or continuous tunnel furnace;
2) zinc oxide resistance sheet [1] after will heating is put into V-type mould [2], and between two adjacent zinc oxide resistance sheets [1], separator [8] is set, inwardly move spanner [7] with the past post-tensioning of chuck [5], the V-type mould [2] that zinc oxide resistance sheet [1] will be housed is packed in the chuck [4] and chuck [5] of anchor clamps [3], unclamp spanner [7], chuck [5] clamps the zinc oxide resistance sheet [1] of putting into V-type mould [2] under the effect of spring [6];
3) main air is divided into tiny air-flow after by control damper [15], suction nozzle [14] and distribution grid [13], the interior epoxy insulation powder [9] of upper box [11] that will be placed on fluid bed [10] holds up and forms fluidized state, simultaneously even fluidisation in the upper box [11] of epoxy insulation powder [9] under the effect of agitating device [16] in fluid bed [10];
4) will be immersed in by the zinc oxide resistance sheet [1] that anchor clamps [3] clip in the fluid bed [10] that holds epoxy insulation powder [9], rotating shaft [17] rotation makes zinc oxide resistance sheet [1] along one to three week of axle center Rotating with Uniform, through the side of the zinc oxide resistance sheet [1] of preheating with regard to uniform deposited last layer epoxy insulation powder [9], again with adhesion place between the zinc oxide resistance sheet [1] after the scriber delineation encapsulation, zinc oxide resistance sheet [1] is separated with separator [8], and zinc oxide resistance sheet [1] is heating and curing at 130-160 ℃ gets final product then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100426221A CN1319080C (en) | 2005-04-29 | 2005-04-29 | Zinc-oxide resistor-piece side insulation package device and packing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100426221A CN1319080C (en) | 2005-04-29 | 2005-04-29 | Zinc-oxide resistor-piece side insulation package device and packing method |
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| Publication Number | Publication Date |
|---|---|
| CN1677578A true CN1677578A (en) | 2005-10-05 |
| CN1319080C CN1319080C (en) | 2007-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100426221A Expired - Fee Related CN1319080C (en) | 2005-04-29 | 2005-04-29 | Zinc-oxide resistor-piece side insulation package device and packing method |
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| CN (1) | CN1319080C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302859C (en) * | 2005-10-31 | 2007-03-07 | 西安交通大学 | Electronic component powder packing apparatus based on fluidized-bed |
| CN101700975B (en) * | 2009-11-20 | 2012-06-27 | 中国西电电气股份有限公司 | Combined formula used for manufacturing zinc oxide resistor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2107951U (en) * | 1990-05-10 | 1992-06-24 | 西安交通大学 | Electrostatic powder packaging apparatus for electronic elements and devices |
| JPH07201538A (en) * | 1993-12-28 | 1995-08-04 | Matsushita Electric Ind Co Ltd | Manufacture of radial lead electronic part |
-
2005
- 2005-04-29 CN CNB2005100426221A patent/CN1319080C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1302859C (en) * | 2005-10-31 | 2007-03-07 | 西安交通大学 | Electronic component powder packing apparatus based on fluidized-bed |
| CN101700975B (en) * | 2009-11-20 | 2012-06-27 | 中国西电电气股份有限公司 | Combined formula used for manufacturing zinc oxide resistor |
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| Publication number | Publication date |
|---|---|
| CN1319080C (en) | 2007-05-30 |
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Granted publication date: 20070530 Termination date: 20100429 |