CN1151923A - Braze welding technology for vacuum insulating utensils of stainless-steel - Google Patents
Braze welding technology for vacuum insulating utensils of stainless-steel Download PDFInfo
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- CN1151923A CN1151923A CN 96116581 CN96116581A CN1151923A CN 1151923 A CN1151923 A CN 1151923A CN 96116581 CN96116581 CN 96116581 CN 96116581 A CN96116581 A CN 96116581A CN 1151923 A CN1151923 A CN 1151923A
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Abstract
The said braze welding processes include the pretreatment of utensil to be welded, heating degassing in vacuum chamber, braze welding via fast local HF induction heating, natural cooling in vacuum chamber and fast cooling outside vacuum chamber. The braze welding apparatus consists of HF induction winding over the vacuum chamber, coils with skeleton sepatately inside and outside the workpiece inside vacuum chamber, lid with evacuating port and brazing agent, and the hinged top cover with diamagnetic window.
Description
What the present invention relates to is a kind of braze welding technology, and especially a kind of braze welding technology for vacuum insulating utensils of stainless-steel belongs to the soldering field in the forming technique.
Vacuum drying oven formula commonly used and chimney flue type seal the vacuum insulating utensils of stainless-steel pricker in the prior art, particularly utilize vacuum drying oven formula technology, the United States Patent (USP) 4527042 that application obtains as Japanese Taiyo Sanso Co., it is a kind of pricker encapsulation method and full-automatic device that is applicable to vacuum tank, its technological process is by heating, settle the pricker shrouding, and step such as pricker envelope is formed, whole flow process is all automatically continuously synchronously carried out in vacuum drying oven according to the order of sequence, at last by being arranged on the outer laser soldering device institute emitted laser bundle of vacuum drying oven, pass the saturating bundle glass plate of vacuum drying oven, directly vacuum in the stove is carried out the pricker envelope.Because the vacuum drying oven volume is bigger, temperature rise is slower, and samming is difficult in the stove, and is slow with the stove cooling velocity, and the easy embrittlement of heating element heater, take fund during maintenance cost, moreover the investment cost of this device is very huge.
The objective of the invention is to overcome deficiency of the prior art.A kind of simple in structure, equipment that investment cost is low provided by the present invention, and the perfect process of a cover have realized overcoming the purpose of deficiency of the prior art.
Content of the present invention mainly is to have adopted an effective process route: cool off naturally in the outer quick local heat pricker of the high-frequency induction penetration type envelope → vacuum of heated baking degasification → vacuum chamber and the outer chilling of vacuum chamber in vacuum insulating utensils of stainless-steel preliminary treatment → vacuum chamber.With this process route a kind of novel apparatus has been proposed again accordingly, promptly adopt pricker envelope heating thermal source to break away from vacuum chamber, utilize radio-frequency induction coil to heat thermal source as soldering, the pricker envelope is carried out to workpiece vacuum insulating utensils of stainless-steel in the vacuum chamber in the top that is arranged at vacuum chamber.At first vacuum insulating utensils of stainless-steel is placed in the vacuum chamber, in vacuum insulating utensils of stainless-steel inner bag cavity, coil rack is set, the heated baking coil is on coil rack, coil rack perhaps is set outside the courage outside vacuum insulating utensils of stainless-steel, and the heated baking coil is on coil rack.Vacuum insulating utensils is provided with the bleeding point bottom, bleeding point bottom top is provided with solder and capping plate, the capping plate also is provided with getter to bleeding point bottom one side, the top is provided with top cover on the vacuum chamber, process is to vacuumizing in the vacuum chamber, be included in this process in vacuum chamber, bake out is when reaching vacuum 10
-3Behind the Pa, connect radio-frequency induction coil, under the electromagnetic induction and kelvin effect of high frequency electric, make be placed in the top of magnetic permeable window in the top cover radio-frequency induction coil with concentration of energy in vacuum insulating utensils bleeding point bottom, capping plate and solder, solder melts in less than 1 minute seals bleeding point, and vacuum insulating utensils is cooled in vacuum chamber less than 200 ℃, and the hinge of top cover side connects top cover and vacuum chamber, open top cover, take out vacuum insulating utensils.
Effect of the present invention is very remarkable, and economic worth, practical value and aspect such as energy-conservation be all than the index advanced person of home and abroad prior art, as table one:
The technical-economic index contrast of table one the present invention and home and abroad prior art
Below with reference to accompanying drawing technical characterictic of the present invention is described in detail:
| Comparison other is content relatively | Domestic prior art | External prior art | The present invention |
| Pricker envelope mode | One-way fired furnace | Three-cell furnace | Beat-type multistation vacuum chamber |
| System's input capacity | ???＞420KVA | ????＞420KVA | ????＜100KVA |
| Heating pricker envelope general power | ???250KW | ????290KW | ????25KW |
| Power consumption | 2.78KW.h/ only | 2.64KW.h/ only | 0.42KW.h/ only |
| Insulating product size (mm) | ≤ Ф 110 * 280 (most economical) | ≤ Ф 110 * 280 (most economical) | Not influenced by product size |
| Pricker envelope temperature | ????＞1050℃ | ????＞1050℃ | ????＜900℃ |
| Pricker envelope technology | Whole | Whole | Local |
| Housing is softening | Have | Have | Do not have |
| Anti-corrosion element segregation solid solution | Have | Have | Do not have |
| Operating mode during maintenance | Produce and pause | Produce and pause | Produce and do not stop |
| Aggregate investment | 950,000 yuans | 105 dollars (F.O.B.) | 900,000 yuans |
Fig. 1 one vacuum chamber one workpiece vacuum pricker seal apparatus schematic diagram
Fig. 2 one vacuum chamber multiplex (MUX) part vacuum pricker seal apparatus schematic diagram
The outer bell-type coil skeleton structure vacuum pricker seal apparatus schematic diagram of Fig. 3
As shown in Figure 1 and Figure 2, the present invention mainly is made of radio-frequency induction coil 1, top cover 2, magnetic permeable window 3, hinge 4, capping plate 5, solder 6, bottom 7, baking coil 8, coil rack 9, vacuum chamber 10, vacuum insulating utensils of stainless-steel 11 etc.Utilize radio-frequency induction coil 1 as pricker envelope heating thermal source, be positioned at the top of vacuum chamber 10.Vacuum insulating utensils of stainless-steel 11 is placed in the vacuum chamber 10, coil rack 9 is arranged in the vacuum insulating utensils of stainless-steel 11 inner bag cavitys, heated baking coil 8 is on coil rack 9, perhaps coil rack 9 is arranged on outside the vacuum insulating utensils of stainless-steel 11 outer courages, and heated baking coil 8 is on coil rack 9.For prevent 8 temperature distortions of heated baking coil and collide with vacuum insulating utensils of stainless-steel 11 after be short-circuited, structurally, heated baking coil 8 outer rims are from the distance of vacuum insulating utensils of stainless-steel 11 inner bag inwalls, perhaps as shown in Figure 3, the distance of heated baking coil 8 inner edges gall bladder wall outside vacuum insulating utensils of stainless-steel 11 is between the 5-10 millimeter.Vacuum insulating utensils of stainless-steel 11 is provided with bleeding point bottom 7, above bottom 7, place solder 6, solder 6 tops are provided with capping plate 5, capping plate 5 is provided with getter (not showing out among the figure) towards the face of bottom 7 directions, top cover 2 directly covers on vacuum chamber 10, establishes magnetic permeable window 3 in the middle of the top cover 2, and magnetic permeable window 3 tops are radio-frequency induction coil 1, the sidepiece of top cover 2 links to each other with vacuum chamber 10 by hinge 4, and top cover 2 can be opened.
Pricker envelope process route of the present invention is: heated baking degasification → vacuum chamber 10 is interior by the quick local heat pricker of high-frequency induction penetration type envelope → vacuum chamber 10 interior cooling and vacuum chamber 10 outer chillings naturally in stainless-steel vacuum insulation ware 11 preliminary treatment → vacuum chamber 10.
At first remove the greasy dirt of vacuum insulating utensils of stainless-steel 11, place then in the vacuum chamber 10, to being evacuated to about 10 in the vacuum chamber 10
-1Pa connects 8 heating of baking coil and carries out bakeout degassing, and baking temperature is 450-600 ℃, and stoving time 5-15 minute, cut off baking coil 8 electric currents afterwards, continue vacuum chamber 10 is vacuumized, when being extracted into 10
-3During Pa, magnetic permeable window 3 tops are connected and run to radio-frequency induction coil, by electromagnetic induction and kelvin effect, make energy see through capping plate 5 and solder 6 that magnetic permeable window 3 concentrates on vacuum insulating utensils of stainless-steel 11 bleeding points, pricker envelope temperature reaches 830-900 ℃, solder 6 melts in less than 1 minute, has sealed vacuum insulating utensils of stainless-steel 11 bleeding points, makes the cavity between the vacuum insulating utensils of stainless-steel 11 inside and outside courages remain on 10
-3Pa vacuum after radio-frequency induction coil 1 operation is removed, can repeat the pricker envelope technology of next workpiece again.After the pricker envelope was finished, vacuum insulating utensils of stainless-steel 11 was cooled in vacuum chamber 10 less than 200 ℃, opened top cover 2, took out the workpiece that processes, the workpiece to be processed of packing into.
The high frequency electric source frequency that adopts is 100-500KHZ, and magnetic permeable window 3 is made by quartz glass, and heater coil skeleton 9 is made by vacuum ceramic.
The present invention can also put two or more vacuum insulating utensils of stainless-steel 11 in a vacuum chamber 10, in order to increase work efficiency.
Claims (7)
1, a kind of braze welding technology for vacuum insulating utensils of stainless-steel, mainly by capping plate (5), solder (6), bottom (7), vacuum chamber (10), vacuum insulating utensils of stainless-steel formations such as (11), it is characterized in that vacuum insulating utensils of stainless-steel utilizes radio-frequency induction coil (1) as pricker envelope heating thermal source, is arranged at the top of vacuum chamber (10).
2, this braze welding technology for vacuum insulating utensils of stainless-steel according to claim 1, its feature is that also coil rack (9) is arranged in interior vacuum insulating utensils of stainless-steel (11) the inner bag cavity of vacuum chamber (10), and baking coil (8) is on coil rack (9); Perhaps coil rack (9) is arranged on outside the interior outer courage of vacuum insulating utensils of stainless-steel (11) of vacuum chamber (10), and baking coil (8) is on coil rack (9).
3, according to claim 1 and 2 described a kind of braze welding technology for vacuum insulating utensils of stainless-steel, its feature also is the distance of heated baking coil (8) outer rim from vacuum insulating utensils of stainless-steel (11) inner bag inwall; Perhaps the distance of heated baking coil (8) inner edge gall bladder wall outside vacuum insulating utensils of stainless-steel (11) is between the 5-10 millimeter.
4, according to claim 1 and 2 described a kind of braze welding technology for vacuum insulating utensils of stainless-steel, its feature also is can also put two or more vacuum insulating utensils of stainless-steel (11) in the vacuum chamber (10).
5, a kind of braze welding technology for vacuum insulating utensils of stainless-steel is characterized in that its pricker envelope process route is: cool off naturally and vacuum chamber 10 outer chillings by the quick local heat pricker of high-frequency induction penetration type envelope → vacuum chamber (10) is interior in the interior heated baking degasification → vacuum chamber of vacuum insulating utensils of stainless-steel (11) preliminary treatment → vacuum chamber (10) (10).
6, a kind of braze welding technology for vacuum insulating utensils of stainless-steel according to claim 5, its feature also are being evacuated down to 10 in the vacuum chamber (10)
-1During Pa, begin to connect baking coil (8), baking temperature is 450-600 ℃, after toasting 5-15 minute, cuts off baking coil (8) electric current, continues to be evacuated down to 10
-3Pa vacuum begins the pricker envelope.
7, it is 830-900 ℃ that a kind of braze welding technology for vacuum insulating utensils of stainless-steel according to claim 5, its feature also are to adopt pricker envelope temperature, and adopting the high frequency electric source frequency is 100-500KHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96116581 CN1151923A (en) | 1996-11-15 | 1996-11-15 | Braze welding technology for vacuum insulating utensils of stainless-steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96116581 CN1151923A (en) | 1996-11-15 | 1996-11-15 | Braze welding technology for vacuum insulating utensils of stainless-steel |
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| Publication Number | Publication Date |
|---|---|
| CN1151923A true CN1151923A (en) | 1997-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96116581 Pending CN1151923A (en) | 1996-11-15 | 1996-11-15 | Braze welding technology for vacuum insulating utensils of stainless-steel |
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| Country | Link |
|---|---|
| CN (1) | CN1151923A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943319A (en) * | 2010-07-23 | 2011-01-12 | 高邮市荣清机械电子有限公司 | Liquefied natural gas (LNG) storage tank for bilayer vacuum brazing vehicle |
| CN103596310A (en) * | 2013-11-01 | 2014-02-19 | 上海交通大学 | Variable cross-section annular fork type induction coil and manufacturing method thereof |
| CN103769712A (en) * | 2013-12-31 | 2014-05-07 | 吴江亿泰真空设备科技有限公司 | Vacuum brazing furnace |
| CN108146874A (en) * | 2017-12-08 | 2018-06-12 | 南京航空航天大学 | A kind of insulation construction integrated high-efficiency heat preservation cold-preserving container and preparation method thereof |
| CN110530543A (en) * | 2019-07-23 | 2019-12-03 | 上海卫星装备研究所 | Closure assembly is heated in vacuum degassing suitable for aerospace product |
| CN113465377A (en) * | 2021-06-21 | 2021-10-01 | 中国原子能科学研究院 | Cold crucible |
| CN114951879A (en) * | 2022-06-08 | 2022-08-30 | 希诺股份有限公司 | Low-temperature efficient vacuumizing sealing equipment and sealing process for vacuum cup |
-
1996
- 1996-11-15 CN CN 96116581 patent/CN1151923A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101943319A (en) * | 2010-07-23 | 2011-01-12 | 高邮市荣清机械电子有限公司 | Liquefied natural gas (LNG) storage tank for bilayer vacuum brazing vehicle |
| CN103596310A (en) * | 2013-11-01 | 2014-02-19 | 上海交通大学 | Variable cross-section annular fork type induction coil and manufacturing method thereof |
| CN103596310B (en) * | 2013-11-01 | 2015-10-14 | 上海交通大学 | Variable cross-section annular fork type induction coil and preparation method thereof |
| CN103769712A (en) * | 2013-12-31 | 2014-05-07 | 吴江亿泰真空设备科技有限公司 | Vacuum brazing furnace |
| CN108146874A (en) * | 2017-12-08 | 2018-06-12 | 南京航空航天大学 | A kind of insulation construction integrated high-efficiency heat preservation cold-preserving container and preparation method thereof |
| CN110530543A (en) * | 2019-07-23 | 2019-12-03 | 上海卫星装备研究所 | Closure assembly is heated in vacuum degassing suitable for aerospace product |
| CN113465377A (en) * | 2021-06-21 | 2021-10-01 | 中国原子能科学研究院 | Cold crucible |
| CN114951879A (en) * | 2022-06-08 | 2022-08-30 | 希诺股份有限公司 | Low-temperature efficient vacuumizing sealing equipment and sealing process for vacuum cup |
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