CN101845544A - Annealing furnace capable of preventing deformation of internal furnaces - Google Patents
Annealing furnace capable of preventing deformation of internal furnaces Download PDFInfo
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- CN101845544A CN101845544A CN 201010182781 CN201010182781A CN101845544A CN 101845544 A CN101845544 A CN 101845544A CN 201010182781 CN201010182781 CN 201010182781 CN 201010182781 A CN201010182781 A CN 201010182781A CN 101845544 A CN101845544 A CN 101845544A
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- expansion joint
- flue
- furnace
- preheating
- heating
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention relates to an annealing furnace capable of preventing the deformation of internal furnaces, which comprises a preheating internal furnace, a heating internal furnace and a cooling water jacket, wherein an expansion joint is connected between the heating internal furnace and a preheating internal furnace, and a counterweight component which is tensed horizontally is arranged on a flange disk of the heating internal furnace which is fixedly connected with the expansion joint. The compensation principle of the expansion joint (also known as telescopic joint) is utilized, that is the effective telescopic deformation of an elastic element of the expansion joint is utilized to absorb the dimensional change of the internal furnace and the preheating internal furnace caused by thermal expansion and contraction. The expansion joint can absorb axial, lateral or angular displacements, compensate for thermal denaturation and mechanical deformation of equipment, absorb various mechanical vibrational energy and play the role of prolonging the service life of the equipment. The expansion joint carries out the telescopic motion through the motion of the counterweight component, thereby limiting the horizontal free expansion amount of the preheating internal furnace and the heating internal furnace (the right forward direction), further ensuring that the expansion direction of the preheating internal furnace and the heating furnace to be consistent with the placement direction and the angle of the actual equipment, preventing the cold and hot deformation and the reduction of the sealing performance of the internal furnaces and ensuring the safety of the production.
Description
Technical field
The present invention relates to a kind of heat treatment furnace, the indeformable annealing furnace of particularly a kind of flue.
Background technology
Stainless material is a kind of important meals material, the solidity to corrosion of the excellence that has, superior formability, pleasing outward appearance and the very wide attracting over-all properties such as strength range of modern industry.At present, Stainless Steel Products tensioning members such as stainless steel double flute, single groove and one stretching tank adopt Bright Annealing and solution treatment usually, common annealing region is 1040 ℃～1120 ℃, adopts annealing atmosphere in anneal usually, generally all is to adopt decomposed ammonia (75%H
2+ 25%N
2) as annealing atmosphere.Currently used Equipment for Heating Processing, in the anneal process, there are the following problems for flue: preheating flue and heating flue are because of being subjected to the thermogenesis thermal expansion, variation to a certain degree takes place in geometrical dimension, general under 1150 ℃ high temperature, the high temperature resistant stainless steel flue produces the elongation of 20mm/1000mm.In process of cooling subsequently, flue produces and shrinks, and geometrical dimension diminishes, can not be returned to heating state before, flue upwarps easily, cause flue and equipment integral than the wide-angle deviation, the direct result that causes thus is exactly next time blow-on of influence.Because upwarping of flue descends the equipment sealing property, causes the waste of a large amount of shielding gas, even more serious consequence is if protective atmosphere (75%H
2+ 25%N
2) with 100%N
2Have little time to switch, also might set off an explosion, have safety in production hidden danger.
Summary of the invention
In order to overcome flue owing to expand with heat and contract with cold and problem on deformation, the present invention proposes the indeformable technical scheme of a kind of annealing furnace.
Have the annealing furnace that prevents furnace deformation, comprise preheating flue, heating flue and watercooling jacket, it is characterized in that between heating flue and preheating flue, being connected expansion joint, on the ring flange of heating flue and expansion joint Joint, establish the balance weight assembly that a level is strained.
Described expansion joint is a stainless steel rectangular fillet expansion joint.
Described balance weight assembly comprises an end and heating flue front end flange dish stay cord that is connected and the weight that is connected the stay cord the other end, and the pulley and the support bar that support stay cord.
Beneficial effect of the present invention: utilize the expansion joint compensation principle of (claiming telescopic joint again), promptly utilize effective dilatation of expansion joint elastic element to absorb flue and preheating flue because the dimensional change former thereby that produce of expanding with heat and contract with cold.But the expansion joint absorption axes to, laterally or angular displacement, the various mechanical vibrational energies of thermally denature, mechanical deformation and absorption that can compensation equipment play the effect that improves service life of equipment.Suitable balance weight assembly is installed on the mounting flange of flue and stainless steel expansion joint, make stretching motion by balance weight assembly traction expansion joint, limit the free stroke of level (right on of flue to) of preheating and heating flue with this, thereby direction and angle that flexible direction and the physical device of guaranteeing preheating and heating flue are put are consistent, the cold and hot distortion and the sealing property that prevent flue descend, and guarantee production safety.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is that the B of Fig. 1 is to view.
Fig. 4 is rectangle expansion joint and joint flange enlarged view.
Embodiment
Shown in Fig. 1～2, annealing furnace comprises preheating oven, process furnace and cool furnace composition, process furnace 10 is made up of the heating furnace lining 8 that heating flue 6, the heating unit 9 that is located at heating flue 6 peripheries are enclosed in heating flue 6 and heating unit 9 peripheries, and preheating oven comprises preheating flue 1 and preheating oven shelf 13.The rear end of heating flue 6 connects watercooling jacket 11, and watercooling jacket 11 is connected with heating flue 6 by rear flange 12.The front end of heating flue 6 is connected and fixed by front end flange 7 and rectangle fillet expansion joint 4 one lateral expansion joint flanges 5, rectangle fillet expansion joint 4 is located between heating flue 6 and the preheating flue 1, is connected and fixed by the expansion joint flange 5 of preheating oven flange 2 with the another side of rectangle fillet expansion joint 4.Balance weight assembly comprises an end and the dead sheave 17 and the support bar 16 that heat flue front end flange 7 stay cord 15 that is connected and the weights 14 that are connected stay cord 15 the other ends and support stay cord.The front end of stay cord 15 is connected with arm-tie 19 on the heating flue forward flange 7 and tightens up, and by dead sheave 17, the terminal and weight 14 of stay cord is connected to a fixed through rope clamp 18 backs.Because the rear end of heating flue 6 is connected with cooling boiler clothing 11 by rear flange 12, the back segment of heating flue 6 when heating the temperature variation rate of expanding with heat and contract with cold less very little, and the front end temperature variation of heating flue 6 is affected by thermal expansion and contraction greatly, and the axial variation specific diameter of heating flue is to greatly, therefore the horizontal direction expansion and contraction is big, because the front end of heating flue 6 is connected and fixed by the side of front end flange 7 with rectangle fillet expansion joint 4, the squeeze part that this elongates or shortens is expressed on the rectangle fillet expansion joint 4 of tool elastic compensating, another part is added on the forward flange 7 of heating flue 6, and by counterweight stay cord 15 and the downward pulling force of pulley 17 generations, flue and the tip-tilted power of expansion joint are become the gravity compensation of weight, the radial deformation that stops flue, the rock deformation pressure of minimizing expansion joint.Though preheating flue 1 electrical heating element direct heating useless, but owing to communicate with heating flue 10, and because preheating flue 1 is inclined upwardly and process furnace connects, the front-end temperature of preheating flue 1 is lower, the higher rate of expanding with heat and contract with cold of temperature of the back segment that connects with process furnace 10 is also bigger, thereby the back segment of preheating flue 1 axial elongation when being heated, upwarp along vergence direction is past, after preheating flue 1 is connected and fixed by the joint flange 5 with rectangle fillet expansion joint 4, the axial stretching power of preheating flue 1 is absorbed by the elasticity breathing of rectangle fillet expansion joint 4, the 4 both sides extrusions of rectangle fillet expansion joint, and to arc surface transmission all around, arc surface recoverable deformation around the expansion joint, the stroke of having offset heating flue and preheating flue horizontal direction.
Shown in Fig. 3～4, expansion joint 8 is a stainless steel rectangular fillet expansion joint, stainless steel substrates by four band U-shaped chambeies is connected into the flattened rectangular cavity, the long-width ratio of rectangular cavity is 4～4.5: 3～3.5, the spacing of front and rear wall is 40～50mm, arc surface all around is the semicircle cambered surface, also can be non-arc surface or acute angle face.
The end face of preheating flue 1 and heating flue 6 is the circular arc arcuate surface, two opening surfaces that connect are the square-section, the preheating flue of openings of sizes and both sides and heating flue adapt, and align with the rectangular aperture cross section of the two side walls of rectangle expansion joint 4, affixed expansion joint flange 5 on the rectangular aperture cross section on rectangle expansion joint 4 two sides, the affixed heating flue of rectangular aperture outer rim flange 7 by the heating flue, between expansion joint flange 5 and heating flue flange 7, establish graphite grazing layer 3, by expansion joint one side flange 5, graphite grazing layer 3 and heating flue flange 7 are formed tongued and grooved flanges before expansion joints and the heating flue, and by trip bolt with expansion flange 5, graphite grazing layer 3 and heating flue flange 7 tighten up.The affixed preheating flue of rectangular aperture outer rim flange 2 by the preheating flue, between expansion joint flange 5 and preheating flue flange 2, also establish graphite grazing layer 3, by expansion joint opposite side flange 5, graphite grazing layer 3 and preheating flue flange 2 are formed expansion joint and preheating flue tongued and grooved flanges, and by trip bolt expansion joint flange 5, graphite grazing layer 3 and preheating flue flange 2 are tightened up.
With wall thickness is 0.5mm, product size is the stainless steel tubular part of the 1Cr18Ni9Ti of Φ 65mm * 170mm, places rectangle expansion joint 4 and balance weight assembly are housed, and the decomposed ammonia (75%H of shielding gas is arranged
2+ 25%N
2) annealing furnace in carry out anneal, annealing temperature is 1040 ℃～1070 ℃, soaking time is 20min.Be 30min cooling time.After entire treatment finishes, check the flexible situation of preheating flue and heating flue.Check result shows: preheating flue and heating flue can be withdrawn into the level attitude state before handling exactly after through heat and cooling.Prevent that furnace deformation and shielding gas from leaking, eliminate accident potential, guarantee production safety, save production cost simultaneously, meet the low-carbon energy-saving requirement, economic benefit obviously improves.
Claims (6)
1. has the annealing furnace that prevents furnace deformation, comprise preheating flue, heating flue and watercooling jacket, it is characterized in that between heating flue and preheating flue, being connected expansion joint, on the ring flange of heating flue and expansion joint Joint, establish the balance weight assembly that a level is strained.
2. according to claim 1 have an annealing furnace that prevents furnace deformation, it is characterized in that described expansion joint is a stainless steel rectangular fillet expansion joint.
3. according to claim 2 have an annealing furnace that prevents furnace deformation, it is characterized in that described stainless steel rectangular fillet expansion joint is the flattened rectangular cavity, and arc surface all around is the semicircle cambered surface.
4. describedly have an annealing furnace that prevents furnace deformation according to claim 2 or 3, the long-width ratio that it is characterized in that described stainless steel rectangular fillet expansion joint is 4～4.5: 3～3.5, and the spacing of front and rear wall is 40～50mm.
5. according to claim 1 have an annealing furnace that prevents furnace deformation, it is characterized in that the preceding tongued and grooved flanges that heats flue is made up of expansion joint one side flange (5), intermediary graphite grazing layer (3) and heating flue flange (7).
6. according to claim 1 have an annealing furnace that prevents furnace deformation, it is characterized in that preheating flue tongued and grooved flanges is made up of expansion joint opposite side flange (5), intermediary graphite grazing layer (3) and preheating flue flange (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010182781 CN101845544A (en) | 2010-05-22 | 2010-05-22 | Annealing furnace capable of preventing deformation of internal furnaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010182781 CN101845544A (en) | 2010-05-22 | 2010-05-22 | Annealing furnace capable of preventing deformation of internal furnaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101845544A true CN101845544A (en) | 2010-09-29 |
Family
ID=42770362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010182781 Pending CN101845544A (en) | 2010-05-22 | 2010-05-22 | Annealing furnace capable of preventing deformation of internal furnaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101845544A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864316A (en) * | 2011-07-08 | 2013-01-09 | 西安福莱特热处理有限公司 | High-temperature creep elongation proof device for sponge titanium reduction and distillation reactor barrel |
| CN108413167A (en) * | 2018-05-15 | 2018-08-17 | 广东世创金属科技股份有限公司 | For the tank connected rectangular expansion joint of Muffle |
| CN117488057A (en) * | 2023-12-28 | 2024-02-02 | 泰州中门子炉业有限公司 | Furnace roller flange correction mechanism of horizontal annealing furnace |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2033939U (en) * | 1988-06-06 | 1989-03-08 | 李健超 | Full sealing cold expansion device |
| US4813654A (en) * | 1987-11-09 | 1989-03-21 | Lee Wilson Engineering Company, Inc. | Annealing furnace base construction |
| JPH0853715A (en) * | 1994-08-11 | 1996-02-27 | Nisshin Steel Co Ltd | Seal structure of expansion joint in muffle furnace |
| CN1215435A (en) * | 1996-04-12 | 1999-04-28 | 热技术公司 | Vertical annealing furnace for a strip treatment device |
| CN101270406A (en) * | 2008-05-06 | 2008-09-24 | 浙江海亮股份有限公司 | Direct combustion type metallic tube bright heat treatment furnace |
-
2010
- 2010-05-22 CN CN 201010182781 patent/CN101845544A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4813654A (en) * | 1987-11-09 | 1989-03-21 | Lee Wilson Engineering Company, Inc. | Annealing furnace base construction |
| CN2033939U (en) * | 1988-06-06 | 1989-03-08 | 李健超 | Full sealing cold expansion device |
| JPH0853715A (en) * | 1994-08-11 | 1996-02-27 | Nisshin Steel Co Ltd | Seal structure of expansion joint in muffle furnace |
| CN1215435A (en) * | 1996-04-12 | 1999-04-28 | 热技术公司 | Vertical annealing furnace for a strip treatment device |
| CN101270406A (en) * | 2008-05-06 | 2008-09-24 | 浙江海亮股份有限公司 | Direct combustion type metallic tube bright heat treatment furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864316A (en) * | 2011-07-08 | 2013-01-09 | 西安福莱特热处理有限公司 | High-temperature creep elongation proof device for sponge titanium reduction and distillation reactor barrel |
| CN102864316B (en) * | 2011-07-08 | 2014-03-05 | 西安福莱特热处理有限公司 | High-temperature creep elongation proof device for sponge titanium reduction and distillation reactor barrel |
| CN108413167A (en) * | 2018-05-15 | 2018-08-17 | 广东世创金属科技股份有限公司 | For the tank connected rectangular expansion joint of Muffle |
| CN117488057A (en) * | 2023-12-28 | 2024-02-02 | 泰州中门子炉业有限公司 | Furnace roller flange correction mechanism of horizontal annealing furnace |
| CN117488057B (en) * | 2023-12-28 | 2024-03-15 | 泰州中门子炉业有限公司 | Furnace roller flange correction mechanism of horizontal annealing furnace |
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Open date: 20100929 |