CN202688411U - Full-sealed carburizing and nitriding system - Google Patents
Full-sealed carburizing and nitriding system Download PDFInfo
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- CN202688411U CN202688411U CN 201220342694 CN201220342694U CN202688411U CN 202688411 U CN202688411 U CN 202688411U CN 201220342694 CN201220342694 CN 201220342694 CN 201220342694 U CN201220342694 U CN 201220342694U CN 202688411 U CN202688411 U CN 202688411U
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- hermetically sealed
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Abstract
The utility model discloses a full-sealed carburizing and nitriding system. The full-sealed carburizing and nitriding system comprises a furnace body and a furnace cover; a housing, a working chamber and a heat insulation layer are arranged on the furnace body; the housing is provided with an integrated cylindrical structure which is formed by welding a bottom sealing cover, a barrel body and a top sealing cover; an annular sealing plate is arranged at the part where the bottom sealing cover is lapped to the barrel body, and the annular sealing plate is clung to the outside of the bottom sealing cover; the annular sealing plate is arranged at the part where the top sealing cover is lapped to the barrel body, and the annular sealing plate is clung to the inside of the top sealing cover; through holes are formed on the top sealing cover; a sealing flange is arranged between the housing and the furnace cover and fixed on the top sealing cover of the housing; an annular concave groove and a sealing mounted in the annular concave groove are arranged on the sealing surface of the sealing flange; the working chamber is arranged in the housing and is communicated with the through holes; and the heat insulation layer is arranged between the housing and the working chamber. According to the full-sealed carburizing and nitriding system disclosed by the utility model, the furnace cover and the housing of the furnace body are sealed with a good effect, a furnace tank can be used for a long time without replacement, and therefore, lots of materials can be saved.
Description
Technical field
The present invention relates to a kind of heat treatment furnace, especially relate to a kind of hermetically sealed nicarbing stove.
Background technology
Well formula nicarbing stove generally is comprised of with seal fan, Muffle pot, heating unit and electrical control system etc. furnace shell, furnace lining, bell and hoisting appliance, stove, furnace shell, furnace lining, Muffle pot from outside to inside successively, wherein furnace lining is exactly the thermal insulation separation thermosphere, Muffle pot is retort, be a kind of open tank, the outside is heated, and inside holds metalwork, bell is provided with hoisting appliance, stove with seal fan etc., and heating unit is located on the furnace lining; When metalwork is carried out nicarbing, metalwork places in the Muffle pot, Muffle pot and bell, the sealings such as furnace bottom are harmonious, form relatively airtight environment, heat the mixing of the interior drip feed carburizer of backward tank and nitriding medium, for example drip kerosene (or ethanol, acetone), logical ammonia, drink in the neither endothermic nor exothermic type gas and increase carbon potential enriched gas and logical ammonia, trolamine or dissolve in pure continuous drip of urea etc., pyrolysis occurs in them under the tufftride temperature, produce active nitrogen, carbon atom, active nitrogen, carbon atom is by the metalwork Surface absorption, infiltrate workpiece surface by diffusion, metalwork is finished nicarbing under the high-temperature closed condition; Muffle pot generally adopts cast steel to cast, or adopt stainless material to be welded, but because prior art all adopts Muffle pot and bell, the mode of the sealings such as furnace bottom is created enclosed space in Muffle pot, installation dimension accuracy requirement to Muffle pot is high, Muffle pot is in case generation distortion or crack just are difficult to recover former state, its sealing effectiveness will be had a greatly reduced quality, and Muffle pot and bell, after the sealing such as furnace bottom, the space is hedged off from the outer world in the tank, need to together heat up tank body, tank body absorbs a large amount of heat energy, so that whole stove intensification efficient is poor, and tank body also can absorb a large amount of active nitrogens, carbon atom, energy dissipation is large, normal operation just must be changed tank body after 1 year, and materials consumption is also very large.Chinese patent literature discloses the patent of a kind of " pit gas carburizing furnace " by name, its Granted publication number is CN 2609939 Y, Granted publication day is on April 7th, 2004, its summary of the invention is to comprise furnace shell, furnace lining, bell, Muffle pot, furnace bottom, the furnace bottom bracing frame, the circulating cooling tank, sealing oil groove, furnace bottom is made of fire brick layer, ring seal oil groove wall is fixedly connected with the plane of furnace bottom bracing frame, the furnace bottom fire brick layer is positioned at casing, the whole suspension ring of furnace bottom are arranged on the casing, casing is positioned on the furnace bottom bracing frame, its lower sidewall and ring seal oil groove wall consist of sealing oil groove, and bottomless Mafu Tank is positioned in the sealing oil groove; The Muffle pot bottom seals in oil groove in this patent, Muffle pot top and bell sealing, and the furnace bottom fire brick layer is movable, is convenient to the furnace bottom cleaning, but does not solve foregoing problems.Chinese patent literature discloses the patent of a kind of " furnace tank of well-type carburizing furnace ", its Granted publication number is CN 201952486 U, Granted publication day is on August 31st, 2011, its summary of the invention is that furnace tank of well-type carburizing furnace comprises circular arc furnace bottom and cylindrical furnace, furnace bottom is provided with permanent seat, the retort opening part is provided with fixed jaw, and furnace bottom is the circular arc of casting, and it is cylindrical that furnace wall employing stainless steel plate rolls; Retort adopts the circular arc furnace bottom in this patent, with the improvement furnace atmosphere circulation, and makes retort not yielding, what but it improved is the structure of converter bottom and body joint, reduce stress herein, still without improving, the space heating Elevated Temperature Conditions is not good in the retort to the sealing at retort and bell place.The patent that Chinese patent literature discloses a kind of " the mixing furnace type structure that is used for bell-type and well formula ", its Granted publication number is CN 101825397 B, Granted publication day is on July 27th, 2011, its summary of the invention is: comprise built-up type retort, built-up type body of heater, shell and flange group, wherein, built-up type retort and built-up type body of heater successively arrange successively from inside to outside, shell is fixedly installed on the body of heater outside, charging tray is fixedly installed in the built-up type retort, and the flange group runs through successively shell and is fixedly connected with the built-up type body of heater and with the built-up type retort; This patent is divided into two portions with whole stove in short transverse, and wherein the Lower Half stove is fixed, and first half stove need to be mentioned fully when picking and placeing workpiece, add the height of Lower Half stove and workpiece, its total height is higher, and the factory height is had higher requirements, and advantage is that workpiece can accurately locate, and pit furnace can bury and subsurface, workpiece need lift after opening bell, and the location is difficult to accurately, but concerning most of workpiece, positioning accuracy request is not high, the inapplicable this type of furnace.
Summary of the invention
The present invention must change with the bell sealing in order to be difficult to after the well formula nicarbing stove retort distortion that overcomes prior art again, cause the problem of larger waste, provide a kind of employing bell and body of heater body seal and sealing effectiveness well reliable, that removes retort from uses and changes the energy that causes and the waste of material, and can shorten the hermetically sealed nicarbing stove of well formula of process time.
To achieve these goals, the present invention is by the following technical solutions: hermetically sealed nicarbing stove, comprise body of heater, bell, described body of heater is provided with shell, working chamber, thermal insulation separation thermosphere, and described shell is the integral type cylindrical structure, described shell and bell contact jaw are provided with through hole, the sealing of the shell the other end is provided with tongued and grooved flanges between described shell and the bell, and described working chamber is located at enclosure, described working chamber is communicated with through hole, and described thermal insulation separation thermosphere is located between shell and the working chamber.Existing nicarbing stove generally all adopts inner heating, retort and bell sealing, but retort is difficult to guarantee the reliability that seals between itself and the bell as heated body, and can waste a large amount of heat energy and raw material, therefore this programme adopts the mode that seals between body of heater shell and the bell, heating unit heats heat treated part in the body of heater working chamber, retort can not re-use, and hold workpiece container and place in the working chamber with the simple knot member of for example charging basket and so on, charging basket can be reused for a long time as container, the charging basket weigh light, heat absorption is few, can not absorb a lot of active nitrogens yet, carbon atom, simultaneously because the heating-up time of having removed retort from, can make whole complete processing time shorten 20%, between heating unit and body of heater shell, it then is the thermal insulation separation thermosphere, under the effect of thermal insulation separation thermosphere, what shell was suffered adds heat seldom, can not make shell produce thermal distortion, the sealing reliability of shell and bell will be very high like this, for preventing that furnace gas from leaking, shell adopts integral structure, can guarantee shell self stopping property except through hole, and adopt flange seal between shell and the bell, use flange can reduce the surface that needs processing treatment on shell and the bell, gasket is set on the flange sealing surface, the things such as sealing-ring can improve sealing effectiveness.
As preferably, described shell is that underseal lid, stack shell, closedtop lid are welded to form.There was certain pressure inside when hermetically sealed nicarbing furnaceman did, shell is as the integral type cylindrical structure, except the integral body manufacturing, also can adopt several parts to be welded to form, comprise closedtop lid with through hole, round shape stack shell, bottom cover etc., the shell of firm welding enough bears the operating pressure of hermetically sealed nicarbing stove, also can reduce the shell cost of manufacture.
As preferably, described underseal lid is provided with annular seal plate with stack shell lap-joint.Annular seal plate is close to underseal lid or stack shell, and lap-joint's structure and weld seam are played booster action.
As preferably, described closedtop lid is provided with annular seal plate with stack shell lap-joint.Annular seal plate is close to closedtop lid or stack shell, and lap-joint's structure and weld seam are played booster action.
As preferably, described tongued and grooved flanges is fixed on the shell.Tongued and grooved flanges can be fixed on the shell with modes such as welding, riveted joint, bolt are fixing, tongued and grooved flanges trim and bell end face fitted seal, and employing pressurizing device or fix with bolt and flange on the bell reaches sealing effectiveness.
As preferably, described tongued and grooved flanges is fixed on the bell.Tongued and grooved flanges can be fixed on the bell with modes such as welding, riveted joint, bolt are fixing, perhaps tongued and grooved flanges and bell one, and tongued and grooved flanges trim and shell end face fitted seal, employing pressurizing device or fix with bolt and shell on the bell reaches sealing effectiveness.
As preferably, described tongued and grooved flanges is provided with respectively the upper and lower flange fixing with bell, shell.Upper and lower flange is fixed on bell, the shell in modes such as welding, riveted joint, bolt are fixing, or is integrated with bell, shell, the sealing of working in coordination of upper and lower flange sealing surface, and employing pressurizing device or fix with bolt and shell on the bell reaches sealing effectiveness.
As preferably, described tongued and grooved flanges trim is provided with annular recesses, sealing-ring, and described sealing-ring places in the annular recesses.Adopt sealing-ring can improve the sealing effectiveness of tongued and grooved flanges, the sealing-ring material is softer, and the space can be better filled in distortion under pressure, increases sealing effectiveness.
As preferably, described tongued and grooved flanges and housing contacts end are provided with water jacket.Water jacket inside is provided with water circulating pipe, and the impact for reducing tongued and grooved flanges heat in the suffered body of heater in body of heater through hole increases the service life.
Therefore, the present invention has following beneficial effect: (1) bell and body of heater body seal, and sealing effectiveness is well reliable; (2) retort is not set, can saves mass energy and material, shorten the process time.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is a kind of local structure synoptic diagram of the present invention.
Fig. 3 is the I local structure enlarged diagram of Fig. 1.
Fig. 4 is the II local structure enlarged diagram of Fig. 1.
Among the figure: 1, body of heater 2, bell 3, shell 4, working chamber 5, thermal insulation separation thermosphere
6, through hole 7, underseal lid 8, stack shell 9, closedtop lid 10, annular seal plate
11, tongued and grooved flanges 12, annular recesses 13, sealing-ring 14, water jacket.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Such as Fig. 1, Fig. 2, Fig. 3, among the embodiment shown in Figure 4, hermetically sealed nicarbing stove, comprise body of heater 1, bell 2, body of heater 1 is provided with shell 3, working chamber 4, thermal insulation separation thermosphere 5, shell 3 is by underseal lid 7, stack shell 8, the closedtop lid 9 integral type cylindrical structures that are welded to form, underseal lid 7 is provided with annular seal plate 10 with stack shell 8 lap-joints, annular seal plate 10 is affixed on underseal and covers 7 outsides, closedtop lid 9 is provided with annular seal plate 10 with stack shell 8 lap-joints, annular seal plate 10 is affixed on closedtop and covers 9 inboards, closedtop lid 9 is provided with through hole 6, be provided with tongued and grooved flanges 11 between shell and 3 bells 2, tongued and grooved flanges 11 is fixed on the closedtop lid 9 of shell 3, and tongued and grooved flanges 11 is provided with water jacket 14 with shell 3 contact jaws, and tongued and grooved flanges 11 trims are provided with annular recesses 12, sealing-ring 13, sealing-ring 13 places in the annular recesses 12, working chamber 4 is located at shell 3 inside, and working chamber 4 is communicated with through hole 6, and thermal insulation separation thermosphere 5 is located between shell 3 and the working chamber 4.
Specific implementation process is, when hermetically sealed nicarbing furnaceman does, bell 2 passes through tongued and grooved flanges 11 press seals with shell 3, heat treated part is in the 4 interior heating of body of heater 1 working chamber, between heating unit and body of heater 1 shell 3, it then is thermal insulation separation thermosphere 5, under the effect of thermal insulation separation thermosphere 5, what shell 3 was suffered adds heat seldom, the water circulating pipe of water jacket 14 inside can reduce tongued and grooved flanges 11 is subjected to body of heater 1 interior heat in body of heater 1 through hole 6 places impact, can not make shell 3 and tongued and grooved flanges 11 produce thermal distortion, shell 3 will be very high with the sealing reliability of bell 2 like this, and 3 on shell adopts annular seal plate 10 in the solder joint place, improved himself stopping property, the gas in the stove can not revealed by shell 3, has guaranteed the normal realization of nicarbing process.
Claims (9)
1. hermetically sealed nicarbing stove, comprise body of heater (1), bell (2), it is characterized in that, described body of heater (1) is provided with shell (3), working chamber (4), thermal insulation separation thermosphere (5), described shell (3) is the integral type cylindrical structure, described shell (3) is provided with through hole (6) with bell (2) contact jaw, the sealing of shell (3) the other end, be provided with tongued and grooved flanges (11) between described shell (3) and the bell (2), described working chamber (4) is located at shell (3) inside, described working chamber is communicated with through hole (6), and described thermal insulation separation thermosphere (5) is located between shell (3) and the working chamber (4).
2. hermetically sealed nicarbing stove according to claim 1 is characterized in that, described shell (3) is welded to form for underseal lid (7), stack shell (8), closedtop lid (9).
3. hermetically sealed nicarbing stove according to claim 1 and 2 is characterized in that, described underseal lid (7) is provided with annular seal plate (10) with stack shell (8) lap-joint.
4. hermetically sealed nicarbing stove according to claim 1 and 2 is characterized in that, described closedtop lid (9) is provided with annular seal plate (10) with stack shell (8) lap-joint.
5. hermetically sealed nicarbing stove according to claim 1 is characterized in that, described tongued and grooved flanges (11) is fixed on the shell (3).
6. hermetically sealed nicarbing stove according to claim 1 is characterized in that, described tongued and grooved flanges (11) is fixed on the bell (2).
7. hermetically sealed nicarbing stove according to claim 1 is characterized in that, described tongued and grooved flanges (11) is provided with respectively the upper and lower flange fixing with bell (2), shell (3).
8. according to claim 1 or 5 or 6 described hermetically sealed nicarbing stoves, it is characterized in that described tongued and grooved flanges (11) trim is provided with annular recesses (12), sealing-ring (13), described sealing-ring (13) places in the annular recesses (12).
9. hermetically sealed nicarbing stove according to claim 1 is characterized in that, described tongued and grooved flanges (11) is provided with water jacket (14) with shell (3) contact jaw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220342694 CN202688411U (en) | 2012-07-16 | 2012-07-16 | Full-sealed carburizing and nitriding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220342694 CN202688411U (en) | 2012-07-16 | 2012-07-16 | Full-sealed carburizing and nitriding system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202688411U true CN202688411U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220342694 Expired - Fee Related CN202688411U (en) | 2012-07-16 | 2012-07-16 | Full-sealed carburizing and nitriding system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202688411U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758167A (en) * | 2012-07-16 | 2012-10-31 | 浙江长兴奇伟工业炉制造有限公司 | Fully-sealed carburization nitriding furnace |
| CN103643199A (en) * | 2013-12-13 | 2014-03-19 | 东北大学 | Pressure nitrogenization furnace |
| CN106835007A (en) * | 2017-03-09 | 2017-06-13 | 山东汇锋传动股份有限公司 | The surfaces nitrided stove of cross wedge rolling die |
| CN106868447A (en) * | 2017-04-11 | 2017-06-20 | 江苏汇九齿轮有限公司 | Gear Processing well formula gas nitriding furnace |
-
2012
- 2012-07-16 CN CN 201220342694 patent/CN202688411U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758167A (en) * | 2012-07-16 | 2012-10-31 | 浙江长兴奇伟工业炉制造有限公司 | Fully-sealed carburization nitriding furnace |
| CN103643199A (en) * | 2013-12-13 | 2014-03-19 | 东北大学 | Pressure nitrogenization furnace |
| CN103643199B (en) * | 2013-12-13 | 2016-02-24 | 东北大学 | A kind of Pressure nitrogenization furnace |
| CN106835007A (en) * | 2017-03-09 | 2017-06-13 | 山东汇锋传动股份有限公司 | The surfaces nitrided stove of cross wedge rolling die |
| CN106868447A (en) * | 2017-04-11 | 2017-06-20 | 江苏汇九齿轮有限公司 | Gear Processing well formula gas nitriding furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20150716 |
|
| EXPY | Termination of patent right or utility model |