CN105246178A - Special electrical leading device for electrical heater and processing technology of special electrical leading device - Google Patents
Special electrical leading device for electrical heater and processing technology of special electrical leading device Download PDFInfo
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- CN105246178A CN105246178A CN201510636322.XA CN201510636322A CN105246178A CN 105246178 A CN105246178 A CN 105246178A CN 201510636322 A CN201510636322 A CN 201510636322A CN 105246178 A CN105246178 A CN 105246178A
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- sintering
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Abstract
The invention discloses a special electrical leading device for an electrical heater and a processing technology of the special electrical leading device. The leading device comprises a conducting post or pole, a glass insulator and a metal bottom plate, wherein the conducting post or pole is arranged on the metal bottom plate through the glass insulator in sintering and penetrating manners. In order to obtain the leading device, the adopted processing technology comprises the following steps: (1) purification and oxidation treatment of the conducting post or pole and the metal bottom plate; (2) purification of a graphite die; (3) die filling; and (4) sintering. Due to the adoption of the scheme, compared with the prior art, the electrical leading device manufactured by the processing technology is relatively simple in structure, relatively high in adhesive strength and compressive strength of the connected part of a binding post and the bottom plate, relatively durable, good in high-temperature corrosion resistance and relatively long in service lifetime.
Description
Technical field
The present invention relates to electric heater annex, be specifically related to that a kind of electric heater is special electrically draws connection device and processing technology thereof, it is applied in the electric heater (rod) that vacuumizes or fill heat-conducting medium or electromagnetic heater (rod), heat-conducting oil furnace, the power supply as this series products is connected with workpiece conducting end, airtight, isolate and use.
Background technology
The electrically heated rod (or heater) filling heat-conducting medium normally work time inner heat-conducting medium temperature usually within 100 DEG C ~ 200 DEG C, heat-conducting oil furnace temperature is then higher is 200 ~ 350 DEG C; Environment for use multidigit in northern open field environment, minimum-30 DEG C; To the heating-up temperature of medium at 10 ~ 100 DEG C; For electromagnetic heating rod, its structure as shown in Figure 1: binding post runs through the use as electrical connection between two Room as shown in Figure 1, and right side is the use of interstar connection room power supply source wiring, and left side is heating chamber falling heat-transfer medium.
At present, electrically drawing connection device is that it is used in above environment and often occurs following point with epoxy resin encapsulation binding post (or taking epoxy resin as the ceramic wiring terminal of binding agent):
1, when heating rod works, temperature raises, its inner heat-conducting medium volume varies with temperature and change of expanding is large, now internal pressure is greater than external pressure, otherwise heat-conducting medium volume contraction and present vacuum shape, now external pressure is greater than inside, because other parts of barred body are steel pipe (or plate) welding, therefore require that binding post faying face must be able to bear and barred body equal pressure, and do not damage.
2, when heating rod (or device) repeatedly by-30 DEG C of heating works of environment minimum temperature to maximum temperature 200 DEG C or 350 DEG C time, the volume of conductive pole insulating material, cohesive force are often because of temperature, pressure change and occur that insulating material is aging, crackle, cohesive force decline or conductive pole such as to loosen at the bad phenomenon;
3, when conductive pole is by big current or high-frequency current, at conductive pole and base plate bonding plane (or binding post sleeve pipe), produce electromagnetic induction heat due to ring-around, occur localized hyperthermia, cause that bonding plane place insulating material is aging, coming off forms gap and leak heat-conducting medium.
From above some, the operating environment requirements of electric heater, heat-conducting oil furnace is higher, therefore encapsulates when binding post material must meet above pressure, temperature, mechanical strength and can use in the environment.
Epoxy resin encapsulation technique is a kind of sealing and curing technique of having many uses general, is usually mixed in a kind of ratio with polyamide (being curing agent again) bi-material by epoxy resin, becomes solid-state after nature or heat solidifies; In explosion-proof electrification, be usually used in explosion-proof chamber and increase the sealing pacifying chamber transition electric installation, there is after solidification certain sealing, bonding force and mechanical strength, serviceability temperature is within 100 DEG C, part is improved resin and can be used in 100 DEG C ~ 160 DEG C temperature, as modified model 8639A(encapsulation) and 8639B(curing agent).This epoxy resin encapsulation technique is as follows: a, encapsulation are to purified treatment: first polish by the rubber seal place emery cloth of rubber seal part, be then placed on the enamel basin (60 that metal detergent solution is housed.C water adds 3% metal detergent) in clean.To remove greasy dirt and dust, guarantee rubber seal place cleans just can have good cohesive force.Clean with running water after taking-up, pull rear control out and only drip.Then the baking oven putting into 80 DEG C gives baking 1.5h, takes out under putting into room temperature, treats that temperature is cool to room temperature.By the cool part to room temperature, be stained with a small amount of acetone cleaning rubber seal place with flat paintbrush, must guard against unnecessary acetone and drip along the gap of surrounding.Then at room temperature treat that acetone all volatilizees.B, quartz sand dehumidifying: appropriate amount of quartz sand be placed in pallet, then put people 50 " the drying in oven 2h of C ~ 60 DEG C, with remove adsorb to obtain gas and moisture.C, resin heat: take out after 8639 epoxy resin being put into 25 DEG C of baking oven inside holding 30min, ensure that its liquid state is stand-by.D, to weigh: with the gentle beaker in sky, 8639A, B epoxy resin, quartz sand are weighed up stand-by in the ratio of 4:1:1.E, batching: at ambient temperature, stir epoxy resin 8639A and 8639B mixed with resin.Quartz sand is added in said mixture, fully stir.F, encapsulation: well-mixed epoxy resin batching is injected, till filling along watering sealing.Should exhaust outlet be stayed during encapsulation, allow inner air discharge.J, solidification: watering is honored as a queen should keep lead-in wire cover bigger diameter end upwards, prevents excessive.The available acetone of excessive part or absolute ethyl alcohol are cleaned.
In the electric heating such as electric heater, heat-conducting oil furnace products application, epoxy resin waters sealing terminal (or binding post), be stressed, temperature alternately change and the physical property that produces is expanded with heat and contract with cold and the reason such as material aging, and mechanical strength, sealing, heat-resisting quantity and unit for electrical property parameters between resin encapsulation block, conducting rod (or binding post), overcoat are declined and make the fail safe of complete sets of products, useful life declines, serious time cause heater failure or scrap.
Summary of the invention
In order to overcome above-mentioned defect, the object of this invention is to provide that a kind of electric heater is special electrically draws connection device and processing technology thereof.This device insulating material can not aging, can corrosion-and high-temp-resistant be reached and not be oxidized, long service life.
For achieving the above object, the technical scheme that the present invention takes is that this draws connection device and has conductive pole or bar, glass insulator and metal base plate; Conductive pole or bar are located on metal base plate by glass insulator sintering.
For obtaining above-mentionedly drawing connection device, the processing technology that the present invention takes is:
The purification of a, conductive pole or bar, metal base plate and oxidation processes
Obtain the bright and clean metal surface without oil by cleaning after conductive pole or bar, metal base plate process, then carry out purified treatment; Vacuum purification treatment temperature is 1050 ± 50 DEG C, and temperature retention time is 50 ± 5min, and vacuum degree is 4x10 ￣ 3Pa; The method of oxidation is placed in stainless steel box by part, is placed in 700 DEG C of box type furnaces, after insulation 10 ± 2min, takes out and rock rapidly air cooling to room temperature;
The purification of b, graphite jig
As requested graphite jig is processed, repeatedly clean graphite jig with gasoline and alcohol, until clean, do not have graphite essence dirt to fall down down, and post-drying, is placed in vacuum furnace and is heated to 1050 ± 50 DEG C, and be incubated 30 ± 5min, vacuum degree is 4x10 ￣ 3Pa;
C, die-filling
With compressed air, the graphite jig handled well is blown off, with the clean soft cloth polishing in surface of glass contact, then by conductive pole (bar), glass insulator, metal base plate, graphite jig assembling, Naked hand during assembling, is forbidden to touch metalwork and gob, particularly sintered surface;
D, sintering
Vacuum malleation glass envelope is drawn, exactly the electric connector sintered part assembled is placed in vacuum furnace, start vacuum pump evacuation to 2x10 ￣ 3Pa, close vacuum valve, be filled with 4x10 ￣ 3Pa high pure nitrogen, start-up routine heat-agglomerating, need not come out of the stove after terminating and can enter cycle of annealing, is cooled to room temperature and can obtains above-mentionedly electrically drawing connection device.
In above-mentioned processing technology, the annealing after the purified treatment of conductive pole or bar, metal base plate and graphite jig, sintering and sintering is all carried out in same vacuum furnace.
In the present invention, insulating material: adopt glass, there is heat steady peace property high expansion coefficient little, electrical insulation properties high, glass is cooled in solid-state process again by solid state change liquid state after high-temperature firing, combine together with the oxide layer perfection of stainless steel material, its bonding force, compression strength, reach maximum.
Baseboard material: select 316L stainless steel, not oxidizable when high temperature 1000 DEG C, can combine together in vitreum, another stainless iron content is very low or do not have, presenting weak magnetic or nonmagnetic, effectively can preventing the electromagnetic induction hot local overheating phenomenon of binding post by producing because of ring-around when larger current or high-frequency current.
Binding post material: 316L stainless steel characteristic is the same, copper, iron material matter also can be adopted as binding post, but copper screw strength is poor, and iron is oxidizable is all unfavorable for actual use.
Owing to this invention takes such scheme, compared with prior art, according to above-mentioned processing technology obtained electrically draw connection device, its structure is more simple, the bonding force of its binding post and back plate connections, compression strength more greatly, more durable in use and corrosion-and high-temp-resistant, longer service life.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 is the structural representation that existing electromagnetic heating rod uses.
Fig. 2 is the special structural representation electrically drawing an embodiment of connection device of electric heater of the present invention.
Fig. 3 is the special structural representation electrically drawing an embodiment of connection device of electric heater of the present invention.
Fig. 4 is present invention process flow chart.
Fig. 5 is temperature-time combination corresponding diagram in sintering process of the present invention.
To be that electric heater of the present invention is special electrically draw connection device application structure schematic diagram in anti-explosion is electromagnetic heating rod to Fig. 6.
In accompanying drawing, 1. anti-explosion terminal box, 2. cable entry, 3. terminal box mounting flange, 4. glass power connecting column, 5. barred body ring flange, 6. oiling is chewed, 7. barred body mounting flange, 8. installs pipe nipple, 9. heat barred body, 10. heat-conducting medium, 11. solenoids, 12. metal base plates, 13. vitreums, 14. double threaded screws, 15. nuts, 16. temperature tubes.
Embodiment
The connection device that draws of the present invention has conductive pole or bar, glass insulator and metal base plate; Conductive pole or bar are located on metal base plate by glass insulator sintering.
For obtaining above-mentionedly drawing connection device, the processing technology that the present invention takes is:
1, the purification of conductive pole or bar, metal base plate and oxidation processes
Obtain the bright and clean metal surface without oil by cleaning after conductive pole or bar, metal base plate process, then carry out purified treatment, to obtain uniform γ phase constitution, purification surface, remove surface gas and impurity, eliminate machining stress simultaneously; Vacuum purification treatment temperature is 1050 DEG C, and temperature retention time is 50min, and vacuum degree is 4x10 ￣ 3Pa; Form suitable oxide-film by oxidation processes on metal parts surface, so that glass infiltrates on it, reach the object of sintering; The method of oxidation is placed in stainless steel box by part, is placed in 700 DEG C of box type furnaces, after insulation 10min, takes out and rock rapidly air cooling to room temperature;
2, the purification of graphite jig
As requested graphite jig is processed, because easily some greasy dirts of absorption, impurity and the moisture absorption in the graphite jig course of processing, before die-filling, must could be used for sintered products after purified treatment; Its method of operation repeatedly cleans graphite jig with gasoline and alcohol, until clean, do not have graphite essence dirt to fall down down, and post-drying, is placed in vacuum furnace and is heated to 1050 DEG C, and be incubated 30min, vacuum degree is 4x10 ￣ 3Pa;
3, die-filling
With compressed air, the graphite jig handled well is blown off, with the clean soft cloth polishing in surface of glass contact, then by conductive pole (bar), glass insulator, metal base plate, graphite jig assembling, Naked hand during assembling, is forbidden to touch metalwork and gob, particularly sintered surface;
4, sinter
Sintering is the critical process that glass capsulation connector manufactures, and sintering quality depends on the factor such as sintering atmosphere, temperature, time in stove.In general temperature height then the time short, the temperature low then time is long;
Vacuum malleation glass envelope is drawn, exactly the electric connector sintered part assembled is placed in vacuum furnace, start vacuum pump evacuation to 2x10 ￣ 3Pa, close vacuum valve, be filled with 4x10 ￣ 3Pa high pure nitrogen, start-up routine heat-agglomerating, need not come out of the stove after terminating and can enter cycle of annealing, is cooled to room temperature and can obtains above-mentionedly electrically drawing connection device; Add thermal stress to reduce and consider the hysteresis quality that vacuum furnace heats, having carried out preheating at 850 DEG C.
Annealing after the purified treatment of what sintering process flow process was given prominence to is exactly some conductive pole or bar, metal base plate and graphite jig, sintering and sintering is all carried out in same vacuum furnace.
In the present invention, insulating material: adopt glass, there is heat steady peace property high expansion coefficient little, electrical insulation properties high, glass is cooled in solid-state process by solid-state again to liquid after high-temperature firing, combine together with the oxide layer perfection of stainless steel material, its bonding force, compression strength, reach maximum.
Baseboard material: select 316L stainless steel, not oxidizable when high temperature 1000 DEG C, can combine together in vitreum, another stainless iron content is very low or do not have, presenting weak magnetic or nonmagnetic, effectively can preventing the electromagnetic induction hot local overheating phenomenon of binding post by producing because of ring-around when larger current or high-frequency current.
Binding post material: 316L stainless steel characteristic is the same, copper material also can be adopted as binding post, but its screw strength is poor, is unfavorable for actual use.
Glass sintering binding post of the present invention compares with epoxy resin encapsulation binding post product and sees the following form:
The present invention is applicable to various vacuum tank or take conduction oil as heat transfer medium, require to have in certain mechanical strength, air-tightness, the equipment of heat-resisting quantity, container, as two Room or chamber (as: airtight vacuum chamber and common pressure chamber, airtight heat-conducting medium hot room and normal pressure and temperature room, or high temperature pressure chamber and common pressure chamber) between the use that is connected of the electrical property of transition, effectively can isolate two Room (or chamber) because of machinery, temperature, pressure, the damage of vacuum degree iso-stress field change to product, and two Room (or chamber) electrical property connection service condition can be met.
Claims (3)
1. electric heater is special electrically draws a connection device, and this special connection device that electrically draws has conductive pole or bar, glass insulator and metal base plate; It is characterized in that described conductive pole or bar are located on metal base plate by glass insulator sintering.
2. the special processing technology of electrically drawing connection device of electric heater as claimed in claim 1, its processing technology is:
The purification of a, conductive pole or bar, metal base plate and oxidation processes
Obtain the bright and clean metal surface without oil by cleaning after conductive pole or bar, metal base plate process, then carry out purified treatment; Vacuum purification treatment temperature is 1050 ± 50 DEG C, and temperature retention time is 50 ± 5min, and vacuum degree is 4x10 ￣ 3Pa; The method of oxidation is placed in stainless steel box by part, is placed in 700 DEG C of box type furnaces, after insulation 10 ± 2min, takes out and rock rapidly air cooling to room temperature;
The purification of b, graphite jig
As requested graphite jig is processed, repeatedly clean graphite jig with gasoline and alcohol, until clean, do not have graphite essence dirt to fall down down, and post-drying, is placed in vacuum furnace and is heated to 1050 ± 50 DEG C, and be incubated 30 ± 5min, vacuum degree is 4x10 ￣ 3Pa;
C, die-filling
With compressed air, the graphite jig handled well is blown off, with the clean soft cloth polishing in surface of glass contact, then by conductive pole (bar), glass insulator, metal base plate, graphite jig assembling, Naked hand during assembling, is forbidden to touch metalwork and gob, particularly sintered surface;
D, sintering
Vacuum malleation glass envelope is drawn, exactly the electric connector sintered part assembled is placed in vacuum furnace, start vacuum pump evacuation to 2x10 ￣ 3Pa, close vacuum valve, be filled with 4x10 ￣ 3Pa high pure nitrogen, start-up routine heat-agglomerating, need not come out of the stove after terminating and can enter cycle of annealing, is cooled to room temperature and can obtains above-mentionedly electrically drawing connection device.
3. the special processing technology of electrically drawing connection device of electric heater according to claim 2, it is characterized in that in above-mentioned processing technology, the annealing after the purified treatment of conductive pole or bar, metal base plate and graphite jig, sintering and sintering is all carried out in same vacuum furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510636322.XA CN105246178A (en) | 2015-09-30 | 2015-09-30 | Special electrical leading device for electrical heater and processing technology of special electrical leading device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510636322.XA CN105246178A (en) | 2015-09-30 | 2015-09-30 | Special electrical leading device for electrical heater and processing technology of special electrical leading device |
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| CN105246178A true CN105246178A (en) | 2016-01-13 |
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| CN201510636322.XA Pending CN105246178A (en) | 2015-09-30 | 2015-09-30 | Special electrical leading device for electrical heater and processing technology of special electrical leading device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107759112A (en) * | 2017-10-09 | 2018-03-06 | 中国兵器工业第二〇三研究所 | A kind of high pressure-bearing space flight propulsion plant electric spark workpiece closure |
| CN108092033A (en) * | 2018-01-24 | 2018-05-29 | 深圳力士智造科技有限公司 | Electrode flange, its manufacturing method and the vacuum drying oven using the electrode flange |
| CN113498223A (en) * | 2020-03-19 | 2021-10-12 | 本田技研工业株式会社 | Heating device and control method of heating device |
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| CN2058304U (en) * | 1989-07-15 | 1990-06-20 | 长春市动力元件厂 | Semi-automatic extruder for plant protein |
| CN1937858A (en) * | 2006-09-29 | 2007-03-28 | 贵阳铝镁设计研究院 | Corrosion-resistance electric heating device |
| CN101531473A (en) * | 2009-04-03 | 2009-09-16 | 西安华泰有色金属实业有限责任公司 | Metal-glass sealing process |
| CN103599941A (en) * | 2013-10-29 | 2014-02-26 | 沈阳理工大学 | Online continuous roller heating device and machining method thereof |
| CN204441103U (en) * | 2015-03-26 | 2015-07-01 | 湖南华冉科技有限公司 | A kind of tantalum capacitor insulator |
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2015
- 2015-09-30 CN CN201510636322.XA patent/CN105246178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2058304U (en) * | 1989-07-15 | 1990-06-20 | 长春市动力元件厂 | Semi-automatic extruder for plant protein |
| CN1937858A (en) * | 2006-09-29 | 2007-03-28 | 贵阳铝镁设计研究院 | Corrosion-resistance electric heating device |
| CN101531473A (en) * | 2009-04-03 | 2009-09-16 | 西安华泰有色金属实业有限责任公司 | Metal-glass sealing process |
| CN103599941A (en) * | 2013-10-29 | 2014-02-26 | 沈阳理工大学 | Online continuous roller heating device and machining method thereof |
| CN204441103U (en) * | 2015-03-26 | 2015-07-01 | 湖南华冉科技有限公司 | A kind of tantalum capacitor insulator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107759112A (en) * | 2017-10-09 | 2018-03-06 | 中国兵器工业第二〇三研究所 | A kind of high pressure-bearing space flight propulsion plant electric spark workpiece closure |
| CN108092033A (en) * | 2018-01-24 | 2018-05-29 | 深圳力士智造科技有限公司 | Electrode flange, its manufacturing method and the vacuum drying oven using the electrode flange |
| CN108092033B (en) * | 2018-01-24 | 2024-03-15 | 深圳力士智造科技有限公司 | Electrode flange, manufacturing method thereof and vacuum furnace adopting electrode flange |
| CN113498223A (en) * | 2020-03-19 | 2021-10-12 | 本田技研工业株式会社 | Heating device and control method of heating device |
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Application publication date: 20160113 |