CN102363834A - Gas seal device for multi-hearth heat treatment furnace - Google Patents
Gas seal device for multi-hearth heat treatment furnace Download PDFInfo
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- CN102363834A CN102363834A CN2011103744132A CN201110374413A CN102363834A CN 102363834 A CN102363834 A CN 102363834A CN 2011103744132 A CN2011103744132 A CN 2011103744132A CN 201110374413 A CN201110374413 A CN 201110374413A CN 102363834 A CN102363834 A CN 102363834A
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Abstract
The invention discloses a gas seal device for a multi-hearth heat treatment furnace. The gas seal device is used for isolating atmosphere in the heat treatment of metal materials, and comprises a left gas seal cavity chamber, a middle gas seal cavity chamber and a right gas seal cavity chamber which are connected sequentially, wherein a first partition plate is arranged between the left gas seal cavity chamber and the middle gas seal cavity chamber; a second partition plate is arranged between the middle gas seal cavity chamber and the right gas seal cavity chamber, and the first partition plate and the second partition plate are provided with through holes through which workpieces pass; exhaust pipes are arranged above the three gas seal cavity chambers; and a gas inlet pipe is arranged below the middle gas seal cavity chamber. In the gas seal device, seal gas with a certain pressure is introduced into the middle gas seal cavity chamber to isolate work gas in the left gas seal cavity chamber from the work gas in the right gas seal cavity chamber, so that an effect of isolating the atmosphere is achieved, and the heat treatment of the metal materials under multiple heat treatment temperature-protective gas combination conditions is realized.
Description
Technical field
The present invention relates to multiple hearth metallic substance heat treatment furnace, refer to a kind of air seal set that is used for the multiple hearth heat treatment furnace particularly.
Background technology
For the metallic substance thermal treatment that protective atmosphere is arranged,, usually protective atmosphere there is various requirement in heat treated different steps.For satisfying the requirement to protective atmosphere in the different heat treatment stage; Usually adopt following 2 kinds of technology: the one, the technology that atmosphere is switched; When needs conversion protective atmosphere; Workpiece is motionless, and the switching of carrying out different protective atmospheres gets final product, and common bell type annealing furnace is exactly this atmosphere handoff technique that adopts; The 2nd, the workpiece mobile technology; When needs conversion protective atmosphere; The protective atmosphere environment is constant, and workpiece is interregional mobile in different atmosphere, to realize the thermal treatment under the different atmosphere; Continuous annealing furnace and multiple hearth heat treatment furnace are attributable to this technology, and this technology can realize the metallic substance thermal treatment under various temperature-shielding gas combination condition.
Technology for first kind of above-mentioned atmosphere switching; If when requiring atmosphere to switch, also require the rapid variation of thermal treatment temp; Common bell type annealing furnace just has been not suitable for, and must adopt atmosphere to switch workpiece rapid heating/cooling technology fast, promptly so-called rapid thermal processing system this moment; And adopt this technology equipment that can make to become too complicated, need to increase a large amount of investments.
For second kind of above-mentioned technology that workpiece moves, if adopt continuous annealing furnace, equipment is complicated, invest bigger, so normally employing in mass-producing strip shape metallic substance is produced of continuous annealing furnace.And multiple hearth heat treatment furnace structure is simple relatively; Invest for a short time, also can realize the metallic substance thermal treatment under multiple thermal treatment temp-shielding gas combination condition, but for this multiple hearth heat treatment furnace; Reach satisfied atmosphere isolation effect, present technology has certain degree of difficulty.
Different atmosphere influences each other between adjacent burner hearth when preventing that workpiece from shifting between burner hearth, between burner hearth, is provided with furnace throat/distance piece usually, and furnace throat/distance piece has multiple structure formation.
Summary of the invention
The object of the invention provides a kind of air seal set that is used for the multiple hearth heat treatment furnace with regard to being to overcome the deficiency of above-mentioned prior art, guarantees the isolation between the different atmosphere, avoids the influence between each atmosphere.
Realize that the technical scheme that the object of the invention adopts is: it comprises three the sealing gland chambers in left, center, right that connect successively;
First dividing plate, between said left sealing gland chamber and middle sealing gland chamber, and dividing plate has the through hole that supplies workpiece to pass through;
Second partition, in said between sealing gland chamber and the right sealing gland chamber, and dividing plate has the through hole that supplies workpiece to pass through;
Two joint flanges lay respectively at the coupling end of said left and right two sealing gland chambers; And the bottom of left and right two sealing gland chambers and the junction of joint flange are respectively equipped with the air knife seam;
Watercooling jacket is positioned at the outer wall of said three sealing gland chambers;
Three vapor pipes pass said watercooling jacket, lay respectively at the top of said three sealing gland chambers;
Inlet pipe is passed said watercooling jacket, from the bottom input sealed gas of said three sealing gland chambers.
Further, the bottom of said left sealing gland chamber and middle sealing gland chamber junction has the air knife seam; Sealing gland chamber and right sealing gland chamber junction also have the air knife seam in said.
In the technique scheme, the internal diameter of said joint flange is not less than the aperture of through hole on first and second dividing plates.
Working process of the present invention is following: be used to isolate the sealed gas of atmosphere from inlet pipe input, get into the sealing gland chamber from the air knife seam and form the sealing gas curtain.Like this, the working gas that gets into left sealing gland chamber receives stopping of middle chamber sealed gas, and most of vapor pipe from left sealing gland chamber is discharged, in escaping on a small quantity behind the sealing gland chamber with sealed gas therefrom the vapor pipe of sealing gland chamber discharge.In like manner, sealing gland cavity seal gas barrier during the working gas that gets into right sealing gland chamber receives, most of vapor pipe from right sealing gland chamber is discharged, in escaping on a small quantity behind the sealing gland chamber with sealed gas therefrom the vapor pipe of sealing gland chamber discharge.
The present invention can reach satisfied atmosphere isolation effect, realizes the metallic substance thermal treatment under multiple thermal treatment temp-shielding gas combination condition.
The present invention has following beneficial effect:
1. adopt three sealing gland chamber structures of the present invention, compare with " distance piece " formula atmosphere isolation structure of continuous annealing furnace, simple in structure, compact, can shorten the length of lehre, reduce manufacturing cost.
2. compare with existing single chamber air seal structure, the present invention adopts three sealing gland chamber structures, because the quantity of sealing gland chamber increases, has strengthened the sealing gland effect, has realized the effective isolation to many furnace chambers lehre atmosphere.
3. compare with rapid thermal processing system, owing to do not have complicated computingmachine, automatically controlled, valve pump system, the present invention adopts three sealing gland chamber structures, structure and simple to operate, and operating safety is reliable and stable, and investment significantly reduces.
Description of drawings
Fig. 1 is used for the structural representation of the air seal set of multiple hearth heat treatment furnace for the present invention.
Fig. 2 is a C place enlarged diagram among Fig. 1.
Fig. 3 is a D place enlarged diagram among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described.
As shown in Figure 1; The air seal set that is used for the multiple hearth heat treatment furnace; Comprise: the left sealing gland chamber 2, middle sealing gland chamber 7 and the right sealing gland chamber 13 that connect successively from left to right; Be provided with first dividing plate 10 between left side sealing gland chamber 2 and the middle sealing gland chamber 7, be provided with second partition 14 between middle chamber 7 and the right chamber 13.First dividing plate 10 has the through hole 10.1 that supplies workpiece to pass, and second partition 14 has the through hole 14.1 that supplies workpiece to pass.
The outer wall of three sealing gland chambers 2,7,14 is provided with watercooling jacket 12.Left bank tracheae 4 is positioned at the top of left sealing gland chamber 2, and passes watercooling jacket 12; Middle vapor pipe 5 is arranged in the top of sealing gland chamber 7, and passes watercooling jacket 12; Right vapor pipe 6 is positioned at the top of right sealing gland chamber 13, and passes watercooling jacket 12.Inlet pipe 11 is passed watercooling jacket 12, from the bottom input sealed gas of three sealing gland chambers 2,7,14.
From the sealed gas (present embodiment is a nitrogen) of inlet pipe 11 feeding certain pressures, sealed gas gets into the sealing gland chamber from the air knife seam, and sews on square one-tenth sealing gas curtain at air knife.Use when of the present invention, left sealing gland chamber 2 is connected with left furnace chamber 1 through joint flange 3, and right sealed chamber 13 passes through joint flange 8 and is connected with right furnace chamber 9.When heat-treating, according to the requirement of technology, feed working gas from turn left sealing gland chamber 1 of left hearth 1, feed working gas the sealing gland chamber 13 to the right from right bearth 9.The working gas that gets into left sealing gland chamber 1 receives and seals stopping of gas curtain, and most of left bank tracheae 4 from left sealing gland chamber 1 is discharged, and sealing gland chamber 7 backs are with therefrom middle vapor pipe 5 discharges of sealing gland chamber 7 of sealed gas in escaping on a small quantity.In like manner, the working gas that gets into right sealing gland chamber 13 receives and seals stopping of gas curtain, and most of right vapor pipe 6 from right sealing gland chamber 13 is discharged, and sealing gland chamber 7 backs are with therefrom vapor pipe 5 discharges of sealed gas in escaping on a small quantity.So far, left sealing gland chamber 4, middle sealing gland chamber 5 and right sealing gland chamber 6 form own protective atmosphere, and pending heat treated workpiece can be according to required protective atmosphere, the different sealing gland chamber of entering from through hole, thus obtain required protective atmosphere.Realize under multiple thermal treatment temp-shielding gas combination condition to metallic substance thermal treatment.
Claims (3)
1. air seal set that is used for the multiple hearth heat treatment furnace is characterized in that: it comprises three the sealing gland chambers in left, center, right that connect successively;
First dividing plate, between said left sealing gland chamber and middle sealing gland chamber, and dividing plate has the through hole that supplies workpiece to pass through;
Second partition, in said between sealing gland chamber and the right sealing gland chamber, and dividing plate has the through hole that supplies workpiece to pass through;
Two joint flanges lay respectively at the coupling end of said left and right two sealing gland chambers; And the bottom of left and right two sealing gland chambers and the junction of joint flange are respectively equipped with the air knife seam;
Watercooling jacket is positioned at the outer wall of said three sealing gland chambers;
Three vapor pipes pass said watercooling jacket, lay respectively at the top of said three sealing gland chambers;
Inlet pipe is passed said watercooling jacket, from the bottom input sealed gas of said three sealing gland chambers.
2. the air seal set that is used for the multiple hearth heat treatment furnace according to claim 1 is characterized in that: the bottom of said left sealing gland chamber and middle sealing gland chamber junction has the air knife seam; Sealing gland chamber and right sealing gland chamber junction also have the air knife seam in said.
3. the air seal set that is used for the multiple hearth heat treatment furnace according to claim 1 and 2 is characterized in that: the internal diameter of said joint flange is not less than the aperture of through hole on first and second dividing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103744132A CN102363834A (en) | 2011-11-22 | 2011-11-22 | Gas seal device for multi-hearth heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103744132A CN102363834A (en) | 2011-11-22 | 2011-11-22 | Gas seal device for multi-hearth heat treatment furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102363834A true CN102363834A (en) | 2012-02-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103744132A Pending CN102363834A (en) | 2011-11-22 | 2011-11-22 | Gas seal device for multi-hearth heat treatment furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105074020A (en) * | 2013-02-25 | 2015-11-18 | 杰富意钢铁株式会社 | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60238426A (en) * | 1984-05-09 | 1985-11-27 | Daido Steel Co Ltd | Gas seal device |
| CN1190675A (en) * | 1996-12-24 | 1998-08-19 | 大同特殊钢株式会社 | Air flow controller |
| CN101250678A (en) * | 2008-03-19 | 2008-08-27 | 苏州中门子科技有限公司 | Low stove pressure convection continuous roller bottom type annealing furnace and annealing technique |
| CN101979700A (en) * | 2010-11-25 | 2011-02-23 | 湖南顶立科技有限公司 | Continuous steam treatment furnace for powder metallurgy product |
| CN202322931U (en) * | 2011-11-22 | 2012-07-11 | 武汉钢铁(集团)公司 | Gas-sealing device for multi-hearth heat treatment furnace |
-
2011
- 2011-11-22 CN CN2011103744132A patent/CN102363834A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60238426A (en) * | 1984-05-09 | 1985-11-27 | Daido Steel Co Ltd | Gas seal device |
| CN1190675A (en) * | 1996-12-24 | 1998-08-19 | 大同特殊钢株式会社 | Air flow controller |
| CN101250678A (en) * | 2008-03-19 | 2008-08-27 | 苏州中门子科技有限公司 | Low stove pressure convection continuous roller bottom type annealing furnace and annealing technique |
| CN101979700A (en) * | 2010-11-25 | 2011-02-23 | 湖南顶立科技有限公司 | Continuous steam treatment furnace for powder metallurgy product |
| CN202322931U (en) * | 2011-11-22 | 2012-07-11 | 武汉钢铁(集团)公司 | Gas-sealing device for multi-hearth heat treatment furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105074020A (en) * | 2013-02-25 | 2015-11-18 | 杰富意钢铁株式会社 | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
| US9957585B2 (en) | 2013-02-25 | 2018-05-01 | Jfe Steel Corporation | Continuous annealing device and continuous hot-dip galvanising device for steel strip |
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Application publication date: 20120229 |