CN101050919A - Atmospheric furnace - Google Patents
Atmospheric furnace Download PDFInfo
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- CN101050919A CN101050919A CN 200610073762 CN200610073762A CN101050919A CN 101050919 A CN101050919 A CN 101050919A CN 200610073762 CN200610073762 CN 200610073762 CN 200610073762 A CN200610073762 A CN 200610073762A CN 101050919 A CN101050919 A CN 101050919A
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- heater
- pipe
- efferent duct
- atmosphere
- atmosphere furnace
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Abstract
An atmosphere furnace is prepared for setting internal isolation plate in internal of shell to isolate internal of shell to be a preheating chamber and a cooling chamber, connecting output pipe to cooling chamber and setting input pipe in internal of output pipe then connecting input pipe to preheating chamber and to an air source, using extension pipe to connect preheating chamber to internal of furnace body and to connect internal of furnace body to cooling chamber.
Description
Technical field
The relevant a kind of atmosphere furnace of the present invention refers to a kind of atmosphere furnace that preheating device can carry out preheating and cooling to the atmosphere in input and the output atmosphere furnace simultaneously that has especially.
Background technology
Existing elevator electrical furnace carries out sintering processing after mainly being positioned over work piece in the atmosphere furnace.In carrying out the process of sintering processing, need in airtight atmosphere furnace, import atmosphere, make work piece via sintering processing after, can form a protective layer on the work piece surface, work piece can be protected and prevent that it from producing oxidation and decarburization.Atmosphere sintering mainly is the composition by controlled atmospher, and conditions such as contained hot state, flowing velocity and flow direction conduct heat, and the quality of the work piece through machining is met the requirements.Therefore the necessary effectively temperature of controlled atmospher is avoided in adding man-hour, causes because of variations in temperature is excessive work piece is produced bad effect.
Fig. 1 is the schematic diagram of existing atmosphere furnace.Atmosphere furnace as shown in the drawing, present mainly includes a base 10 ', a body of heater 20 ', a heater 30 ' and a bonnet 40 '.
Wherein body of heater 20 ' is fixedly arranged on the base 10 '; Bonnet 40 ' covers at body of heater 20 ' outside, and is provided with heater 30 ' between body of heater 20 ' and bonnet 40 '.Heat at body of heater 20 ' outer wall by heater 30 ', its heat energy that produces can be guided into body of heater 20 ' inside and heat via the conduction of body of heater 20 ' outer wall.
Again, above-mentioned existing atmosphere furnace is provided with an input pipe 50 ' and is connected with an air supply source 52 ', and extends into the top in the body of heater 20 '; Input pipe 50 ' is provided with a heater 54 ', makes the atmosphere of being supplied with by air supply source 52 ', can be heated to a proper temperature via heater 54 ' after, input to body of heater 20 ' inside by input pipe 50 ' again.Other is provided with an efferent duct 60 ', extends to body of heater 20 ' outside by body of heater 20 ' bottom; Efferent duct 60 ' is gone up and is provided with a cooler 62 ', makes atmosphere and the waste gas that body of heater 20 ' is inner, after can cooling off and reduce temperature via cooler 62 ', be discharged in body of heater 20 ' outside by efferent duct 60 ' again.
But existing atmosphere furnace so that an atmosphere of importing and exporting is carried out the processing of preheating and cooling respectively, thereby needs to expend too much electric energy and cost owing to need set up heater 54 ' and cooler 62 ' respectively in sintering process; And machining machine and tool such as heater 54 ' and cooler 62 ' and equipment are easy to produce the infringement that can not expect in process, cause processing temperature to be difficult to reach stable control, make work piece be difficult to keep good processing quality.
Summary of the invention
Main purpose of the present invention is to provide a kind of atmosphere furnace, and the preheating device that it can be had by atmosphere furnace itself carries out preheating to the atmosphere of input, reduces production cost.
Another object of the present invention is to provide a kind of atmosphere furnace, it mainly is to atmosphere utilization heat exchange action and principle in input and the output atmosphere furnace, produces the effect of heating and cooling simultaneously with the atmosphere that institute is imported and exports, and reaches cost-effective purpose.
For reaching above-mentioned purpose, the present invention mainly bottom in the atmosphere furnace body of heater is provided with a preheating device, and this preheating device includes housing, internal partition, efferent duct, input pipe, extension and communicating pipe.Internal partition is located at enclosure interior, makes enclosure interior be separated into a preheating chamber and a cooling chamber, and lays respectively at the upper-lower position of enclosure interior and not connected; The upper surface place of housing is provided with a disconnected hot plate, in order to prevent the producing heat conduction between preheating device and body of heater.Efferent duct is connected in housing lower surface place, and extends the body of heater outside, and is connected with cooling chamber, with the atmosphere and the waste gas of discharging body of heater inside.Input pipe is arranged at efferent duct inside, and has the gap between input pipe and the efferent duct, as the path of efferent duct output gas; Input pipe one end extends the body of heater outside, and is connected with an air supply source, by the outside inwardly input of body of heater atmosphere; Input pipe is connected with preheating chamber after end then wears the supercooling chamber in addition.Extension is located at housing upper surface place and is connected with preheating chamber, extension and wore disconnected hot plate after extend to top in the body of heater.Be located at housing upper surface place communicating pipe, and be connected with cooling chamber after passing preheating chamber; Disconnected hot plate in communicating pipe the opposite position place then offer a gas collection hole, make communicating pipe be connected with body of heater inside.Make thus and produce a heat exchange action by internal partition between preheating chamber and the cooling chamber, make atmosphere and waste gas institute tool heat energy in the cooling chamber of flowing through, can absorb and conduct to preheating chamber by internal partition, cause the atmosphere of being flowed through in the preheating chamber can be simultaneously via contacting with internal partition and heating.
Description of drawings
Fig. 1 is the schematic diagram of existing atmosphere furnace.
Fig. 2 is the atmosphere furnace schematic diagram of a preferred embodiment of the present invention.
Fig. 3 is the preheating device schematic diagram of a preferred embodiment of the present invention.
Fig. 4 is the interior schematic diagram that produces thermal convection current of the preheating device of a preferred embodiment of the present invention.
The element numbers explanation
10 bases
12 fixation kits
14 furnace linings
20 bodies of heater
30 bonnets
40 heaters
50 preheating devices
51 housings
512 preheating chambers
514 cooling chambers
52 internal partitions
53 efferent ducts
532 first pipe taps
5,322 first valve bodies
5324 vavuum pumps
534 second pipe taps
5,342 second valve bodies
54 input pipes
542 the 3rd valve bodies
544 air supply sources
55 extensions
56 tube connectors
60 disconnected hot plates
62 gas collection holes
10 ' base
20 ' body of heater
30 ' heater
40 ' bonnet
50 ' input pipe
52 ' air supply source
54 ' heater
60 ' efferent duct
62 ' cooler
The specific embodiment
For further understanding structure of the present invention, feature and purpose thereof, attached with graphic and preferred embodiment, describe in detail as after.
Fig. 2 is the atmosphere furnace schematic diagram of a preferred embodiment of the present invention.See also shown in Figure 2ly, atmosphere furnace of the present invention includes a base 10, a body of heater 20, a bonnet 30, a heater 40 and a preheating device 50.
Wherein body of heater 20 bottoms are fixedly arranged on the base 10 by a plurality of fixation kits 12, and are provided with a furnace lining 14 with effect of heat insulation between body of heater 20 inner bottom parts and base 10.This furnace lining 14 is made by a heat insulation material, goes out via base 10 dissipations with the heat energy of breaking off body of heater 20 inside.Between base 10 and body of heater 20 abutted surfaces, can be provided with a sealing ring (figure does not show), make in the body of heater 20 to be a confined space really.
Fig. 3 is the preheating device schematic diagram of a preferred embodiment of the present invention.Please consult shown in Figure 3ly simultaneously, the present invention mainly bottom in body of heater 20 is provided with preheating device 50.This preheating device 50 has and is hollow housing 51 in one, and the best is with can resistant to elevated temperatures metal material made.Housing 51 inside are provided with an internal partition 52 in addition, make housing 51 inside be separated into a preheating chamber 512 and a cooling chamber 514, and they lay respectively at the upper-lower position of housing 51 inside and not connected.Be provided with the upper surface place that a disconnected hot plate 60 is positioned at housing 51 again,, avoid directly producing the heat conduction therebetween in order to the bottom of isolated preheating device 50 with body of heater 20.
Again, housing 51 upper surface places are provided with an extension 55 and are connected with preheating chamber 512.Extension 55 and after wearing disconnected hot plate 60 extends to the top in the body of heater 20.Housing 51 upper surface places are provided with a connecting pipe 56 in addition, pass preheating chamber 512 backs this communicating pipe 56 and are connected with cooling chamber 514.Disconnected hot plate 60 is positioned at and communicating pipes 56 opposite position place, then offers a gas collection hole 62, makes communicating pipe 56 be connected with body of heater 20 inside thus.
Below be described further at the using method of this preferred embodiment: the workpiece of desiring sintering when present embodiment is blind pipe workpiece or workpiece inside when containing other gas, for avoiding influencing the result of workpiece sintering, needs the step of being taken a breath in body of heater 20 inside.After at first the 3rd valve body 542 on the input pipe 54 and second pipe tap 534 and second valve body 5342 being closed, open first valve body 5322 on first pipe tap 532, start the running that vavuum pump 5324 is bled, make body of heater 20 and the preheating device 50 inner air that exist extract to extraneous via the efferent duct 53 and first pipe tap 532; Treat that body of heater 20 and preheating device 50 inside are a near vacuum state or are a negative pressure value of setting, can close first valve body 5322 and vavuum pump 5324 on first pipe tap 532, and open the 3rd valve body 542 on the input pipe 54, make atmosphere enter body of heater 20 inside via input pipe 54, preheating device 50 and extension 55 in regular turn from air supply source 544, treat that atmosphere is full of whole body of heater 20 and preheating device 50 inside reach a suitable malleation value, promptly finish the step of ventilation.
Fig. 4 is the inner schematic diagram that produces convection current of the preheating device of a preferred embodiment of the present invention.Please consulting shown in Figure 4ly simultaneously, when present embodiment is desired to carry out sintering process, at first is that the outer wall by 40 pairs of bodies of heater 20 of heater heats, so that body of heater 20 can pass through heat exchange pattern, the thermal energy conduction that body of heater 20 outer walls are absorbed is to body of heater 20 inside.In the process that heater 40 heats, the 3rd set on the input pipe 54 valve body 542 is opening, the atmosphere that air supply source 544 is provided can be by behind the 3rd valve body 542, be directed in preheating chamber 512 inside of preheating device 50 via input pipe 54, first valve body 5322 on first pipe tap 532 then need is closed condition; 5342 need of second valve body on second pipe tap 534 are an opening.After atmosphere continued via input pipe 54 importing preheating chambers 512 inside, the guiding via extension 55 entered in body of heater 20 inner tops again.Because heater 40 this moment heating furnace body 20 constantly, make the heating that the atmosphere that is directed in body of heater 20 inner tops also can be continued simultaneously.At this moment, high-temperature atmosphere is because its density is lower, so buoyance lift and be accumulated in body of heater 20 inner tops upward; Atmosphere increase along with input body of heater 20 inside, the atmosphere of high temperature can move to body of heater 20 belows gradually, and the atmosphere that temperature is lower or waste gas enters cooling chamber 514 inside of preheating device 50 via gas collection hole 62, discharges in body of heater 20 outsides via efferent duct 53, second pipe tap 534 and second valve body 5342 in regular turn again.The atmosphere for the treatment of high temperature is full of body of heater 20 inside, can carry out sintering work to the workpiece that is positioned over body of heater 20 inside by the atmosphere of high temperature.
In this preferred embodiment, the lower-temperature atmosphere of being imported via the input pipe 54 of preheating device 50, in the process of input pipe 54 of flowing through, because efferent duct 53 is coated on the outside of input pipe 54, so input pipe 54 tube walls can absorb by the atmosphere of efferent duct 53 discharges or the heat energy of waste gas, make the input pipe 54 interior atmosphere of flowing through to carry out the preheating first time by input pipe 54 tube walls absorption heat energy and heat; At the same time by the atmosphere or the waste gas of efferent duct 53 output, can be by reaching the tube wall of contact input pipe 54, cause via the atmosphere of efferent duct 53 output or the heat energy of waste gas, the effect of can be simultaneously carrying out heat exchange by input pipe 54 tube walls reduces its temperature, reaches cooling purpose.And by extending input pipe 54 and efferent duct 53 length, or on input pipe 54 tube walls, form a wavy structure, further can prolong the time that contacts area and heat exchange between atmosphere and input pipe 54 tube walls, and then for the preheating of input pipe 54 internal atmospheres, and, can reach preferable effect for the cooling of efferent duct 53 internal atmospheres and waste gas.
Moreover, because entering preheating chamber 512 is the lower atmosphere of temperature, in the cooling chamber 514 is higher atmosphere of temperature or waste gas and entered through gas collection hole 62 and tube connector 56 by body of heater 20 inside, so can produce a temperature difference at preheating chamber 512 and 514 of cooling chambers, make and to enter high-temperature atmosphere in the cooling chamber 514 or waste gas when rising touches the internal partition 52 that is positioned at 514 of preheating chamber 512 and cooling chambers, the heat of high-temperature atmosphere or waste gas can be absorbed by internal partition 52 and isolate, and then make the absorbed lower-temperature atmosphere of heat or discarded because of the higher generation sinking of density effect, so high-temperature atmosphere and waste gas constantly absorb heat reduction temperature via internal partition 52 and descend, and make other high temperature and relatively low atmosphere and the waste gas of density be driven rising simultaneously, and then in cooling chamber 514, producing the phenomenon of a thermal convection current, last cooled lower-temperature atmosphere and waste gas can be discharged via efferent duct 53; Similarly, high-temperature atmosphere in entering preheating chamber 512, the heat that has absorbed cooling chamber 514 interior high-temperature atmospheres or waste gas owing to internal partition 52 makes internal partition 52 can keep higher temperature, make and to enter atmosphere that preheating chamber 512 contact with internal partition 52 owing to the generation heat exchange action, carrying out the preheating second time by internal partition 52 once more heats, and the high-temperature atmosphere density that is heated by internal partition 52 reduces and rises, and impel the higher and atmosphere that temperature is lower of relative density to be driven and contact with internal partition 52, and then in preheating chamber 512, also producing the phenomenon of a thermal convection current, the atmosphere of final high temperature can enter body of heater 20 inside via the extension 55 of preheating chamber 512 tops.Make this preheating device 50 can reach thus and carry out the processing of preheating, and make the atmosphere of body of heater 20 inside or waste gas in discharging process, to discharge again in body of heater 20 simultaneously through cooling processing for the atmosphere of input body of heater 20 inside.
In the present embodiment, be positioned at internal partition 52 structures of 514 of preheating chamber 512 and cooling chambers again,, further can have a wavy curved surface, make between internal partition 52 and atmosphere, can have bigger contact area, to improve the heat exchanger effectiveness between internal partition 52 and atmosphere; Moreover the wavy curved surface that produces more can to slow down flow rate, prolong the time that contacts with internal partition 52 so that fluids such as atmosphere in preheating chamber 512 and the cooling chamber 514 and waste gas produce the phenomenon of sinuous flow, obtain the heating of the best and the effect of cooling.
Though the present invention is described in detail by above-mentioned preferred embodiment; only make and know those skilled in the art and can be easier to understand the present invention in order to explanation the present invention; non-ly be used for limiting scope of the invention process; all equalizations of being done according to the described shape of claim scope of the present invention, structure, feature and spirit change and modify, and all should be included in the scope of patent protection of the present invention.
Claims (10)
1. atmosphere furnace, it includes:
One base;
One body of heater is fixedly arranged on this base by a plurality of fixation kits, this body of heater inner bottom part and this end
Be provided with a furnace lining with effect of heat insulation between seat;
One bonnet, made by heat insulation material, cover at this body of heater outside;
One heater is arranged between this bonnet and this body of heater; And
One preheating device is positioned at the bottom of this body of heater, and it includes:
Be hollow housing in one;
One internal partition is located at this enclosure interior, makes this enclosure interior be separated into preheating chamber and reaches
Cooling chamber, and lay respectively at the upper-lower position of this enclosure interior and not connected; The upper surface place of this housing also is provided with disconnected hot plate;
One efferent duct connects this housing lower surface place and extends this body of heater outside, and is connected with this cooling chamber;
One input pipe is arranged at this efferent duct inside, and and this efferent duct between have the gap, this input pipe one end extends this body of heater outside, and is connected with an air supply source, this input pipe was connected with this preheating chamber after in addition end then wears this cooling chamber;
One extension is provided with this housing upper surface place and is connected with this preheating chamber, and this extension wore the top that extends to behind this disconnected hot plate in this body of heater; And
A connecting pipe is located at this housing upper surface place, and is connected with this cooling chamber after passing this preheating chamber; Should disconnected hot plate be positioned at this communicating pipe the opposite position place offer gas collection hole, this communicating pipe is connected with this body of heater inside.
2. atmosphere furnace as claimed in claim 1, wherein this efferent duct end is separated into first pipe tap and second pipe tap, and this first pipe tap and second pipe tap are respectively equipped with first valve body and second valve body, and are provided with vavuum pump on this first pipe tap.
3. atmosphere furnace as claimed in claim 1 or 2, wherein this input pipe is provided with the 3rd valve body, and is connected with this air supply source.
4. atmosphere furnace as claimed in claim 1, wherein this internal partition has wavy curved surface.
5. atmosphere furnace as claimed in claim 1 wherein is provided with sealing ring between this base and this body of heater abutted surface.
6. atmosphere furnace as claimed in claim 1, wherein this efferent duct and this input pipe wore this furnace lining and this base and extended to this body of heater outside.
7. atmosphere furnace, its preheating device mainly are arranged at the bottom in the body of heater of this atmosphere furnace, and this preheating device includes:
Be hollow housing in one;
One internal partition is located at this enclosure interior, makes this enclosure interior be separated into preheating chamber and cooling chamber, and lays respectively at the upper-lower position of enclosure interior and not connected; The upper surface place of this housing also is provided with a disconnected hot plate;
One efferent duct connects this housing lower surface place and extends this body of heater outside, and is connected with this cooling chamber;
One input pipe is arranged at this efferent duct inside, and and this efferent duct between have the gap, this input pipe one end extends this body of heater outside, and is connected with air supply source, this input pipe other end was connected with this preheating chamber after then wearing this cooling chamber;
One extension is provided with this housing upper surface place and is connected with this preheating chamber, and this extension wore the top that extends to behind this disconnected hot plate in this body of heater; And
A connecting pipe is located at this housing upper surface place, and is connected with this cooling chamber after passing this preheating chamber; Should disconnected hot plate be positioned at this communicating pipe the opposite position place offer gas collection hole, this communicating pipe is connected with this body of heater inside.
8. atmosphere furnace as claimed in claim 7, wherein this efferent duct end is separated into first pipe tap and second pipe tap, and this first pipe tap and second pipe tap are respectively equipped with first valve body and second valve body, and are provided with vavuum pump on this first pipe tap.
9. as claim 7 or 8 described atmosphere furnace, wherein this input pipe is provided with the 3rd valve body, and is connected with this air supply source.
10. atmosphere furnace as claimed in claim 7, wherein this internal partition has wavy curved surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610073762XA CN100462658C (en) | 2006-04-05 | 2006-04-05 | Atmospheric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610073762XA CN100462658C (en) | 2006-04-05 | 2006-04-05 | Atmospheric furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101050919A true CN101050919A (en) | 2007-10-10 |
| CN100462658C CN100462658C (en) | 2009-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610073762XA Expired - Fee Related CN100462658C (en) | 2006-04-05 | 2006-04-05 | Atmospheric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100462658C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829029A (en) * | 2012-07-03 | 2012-12-19 | 苏州张扬能源科技有限公司 | Efficient circular cooling device |
| CN102906524A (en) * | 2010-04-14 | 2013-01-30 | 艾伯纳工业筑炉有限公司 | Method for pre-heating annealing material in a hood-type annealing system |
| CN103453765A (en) * | 2013-08-29 | 2013-12-18 | 江苏高皓工业炉有限公司 | Simple cover type saw blade sintering furnace |
| WO2019161214A1 (en) | 2018-02-18 | 2019-08-22 | Markforged, Inc. | Sintering furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS53127312A (en) * | 1976-06-17 | 1978-11-07 | Daido Steel Co Ltd | Continuous atomosphere furnace and method of supplying atomosphere gas therein |
| JPH0791628B2 (en) * | 1989-12-22 | 1995-10-04 | 大同ほくさん株式会社 | Nitriding furnace equipment |
| JP3007432B2 (en) * | 1991-02-19 | 2000-02-07 | 東京エレクトロン株式会社 | Heat treatment equipment |
| JP3020412B2 (en) * | 1994-08-11 | 2000-03-15 | 湘南窒化工業株式会社 | Method and apparatus for producing surface-hardened titanium and titanium alloy articles |
| CN2605544Y (en) * | 2003-02-21 | 2004-03-03 | 司书珂 | Bell type inert gas-shielded fritting furnace |
| CN2709905Y (en) * | 2003-11-17 | 2005-07-13 | 株洲科泰感应加热设备有限公司 | Bell multi-firepot induction heating furnace |
| CN1330920C (en) * | 2004-03-18 | 2007-08-08 | 汤世国 | Well type non-cylinder pre-sucking vacuum protective atomosphere furnace |
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2006
- 2006-04-05 CN CNB200610073762XA patent/CN100462658C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102906524A (en) * | 2010-04-14 | 2013-01-30 | 艾伯纳工业筑炉有限公司 | Method for pre-heating annealing material in a hood-type annealing system |
| CN102906524B (en) * | 2010-04-14 | 2015-10-14 | 艾伯纳工业筑炉有限公司 | For the method for thermal annealing part pre-in bell-type annealing equipment |
| CN102829029A (en) * | 2012-07-03 | 2012-12-19 | 苏州张扬能源科技有限公司 | Efficient circular cooling device |
| CN103453765A (en) * | 2013-08-29 | 2013-12-18 | 江苏高皓工业炉有限公司 | Simple cover type saw blade sintering furnace |
| WO2019161214A1 (en) | 2018-02-18 | 2019-08-22 | Markforged, Inc. | Sintering furnace |
| EP3752307A4 (en) * | 2018-02-18 | 2021-11-17 | Markforged, Inc. | Sintering furnace |
| US11913724B2 (en) * | 2018-02-18 | 2024-02-27 | Markforged, Inc. | Sintering furnace |
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| Publication number | Publication date |
|---|---|
| CN100462658C (en) | 2009-02-18 |
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Owner name: LICHEN SCIENCE AND TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHENG WENRUI Effective date: 20091218 |
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Effective date of registration: 20091218 Address after: Township Village five power park in Taiwan Taoyuan County China 21 adjacent Po No. 9-1 Patentee after: Li Chen Technology Co., Ltd. Address before: Taoyuan County, Taiwan province Longtan Township Zhongxing village, 34 neighbors, Tianlong two lane 11, No. 2 building Patentee before: Zheng Wenrui |
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Granted publication date: 20090218 Termination date: 20110405 |