CN102586581A - Top forced convection type non-standard bell-type furnace - Google Patents
Top forced convection type non-standard bell-type furnace Download PDFInfo
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- CN102586581A CN102586581A CN2012100620166A CN201210062016A CN102586581A CN 102586581 A CN102586581 A CN 102586581A CN 2012100620166 A CN2012100620166 A CN 2012100620166A CN 201210062016 A CN201210062016 A CN 201210062016A CN 102586581 A CN102586581 A CN 102586581A
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Abstract
The invention belongs to the technical field of heat treatment processing equipment and relates to an improved non-standard heat treatment bell-type furnace with a top forced convection structure. The bell-type furnace comprises a furnace base, a furnace bottom cross supporting frame and a furnace cover and is characterized in that a convection fan is arranged at the top of the furnace cover; a corrugated inner cover air guide barrel is arranged in the furnace cover; base heating elements are also distributed on the furnace base; a corrugated cover plate covers the heating elements; an air inlet is arranged on the side of the furnace base; a two-layer seal ring and a water cooling jacket are arranged between the furnace base and the furnace cover; asbestos packing is arranged at the inner layer of the two-layer seal ring; a silicon rubber ring is arranged at the outer layer of the two-layer seal ring; and a U-shaped pressure gauge is arranged at the top of the furnace cover. The bell-type furnace has the following beneficial effects: the bell-type furnace can meet the requirements on the mechanical performances of the novel steel belts after annealing, is especially suitable for annealing the steel belts made of BSYE-N material, fills in the blank of the steel belt product in China and breaks through the technical bottleneck restricting development of the technology; and the production cost is greatly lowered by adopting the bell-type furnace compared with the cost by adopting the traditional bell-type furnaces.
Description
Technical field
The invention belongs to the heat treatment process equipment technical field, relating to is a kind of improved non-standard thermal treatment bell furnace with top forced convection structure.
Background technology
Anneal of material mainly contains two basic roles, and the one, eliminate the sclerosis and the unrelieved stress that produce in the course of processing, softener material improves plasticity, is convenient to further processing; The 2nd, the weave construction of change material obtains needed grain fineness number and grain orientation.Cover annealing is one of heat treated major technique of cold rolling steel, is about to a few coil materials and builds up buttress, carries out heat temperature raising after covering with protective guard, and the annealing temperature that reaches regulation is also cooled off after insulation again.
Single buttress formula or multiple-stack are adopted in general cover annealing, have piled up neatly protective guard on the steel back cover, feed protection gas; Cover is gone up heating mantles again, between heating mantles and protective guard, heats, through flowing the heat transferred steel of protection gas in the protective guard; Be incubated after being heated to the annealing temperature of requirement; Remove heating mantles then, cover is gone up cooling cowl again, with wind and/or be water-cooled to normal temperature.
The shortcoming that existing steel cover annealing exists is: bell furnace heating or cooling separately in the annealing process, heat can not recycles, caused the waste of the energy; Utilize heating mantles to steel indirect type heating in the protective guard, heat transfer efficiency is low, causes steel bonding easily; Frequently change cover, running cost is high, and labour intensity is big, poor stability.
At present, traditional bell furnace is general, and what adopt is the clean annealing that unprotect atmosphere or logical hydrogen carry out, but for the band steel board of type material, its annealing product technical requirements is very high.Such as the steel band of BSYE-N material, this band steel is a kind of starting material of wear-resisting pipe, and wear-resisting pipe is welded through rolling by high carbon steel, because the weldability of high carbon steel is very poor, thereby will carry out anneal to improve weldability to it.To surperficial specification of quality is to realize low or non oxidizing annealing requirement, but the requirement of product mechanical property is then required very high, and technical indicator reaches following requirement: 1) ys :≤300MPa; 2) tensile strength :≤300MPa; 3) elongation after fracture:>=25%; 4) steel Decarburized layer :≤0.08mm.
The existing standard bell furnace is generally the perhydro bell furnace, can make full use of the nitrogen atmosphere reductive action, make in the coil annealing process inside and outside temperature distribution more evenly, the surperficial cleaning more of coil of strip.Therefore the perhydro bell furnace has obtained very to use widely in industries such as iron and steel.But its use cost is too high, does not reach the production capacity requirement, and especially for the steel band of BSYE-N material, after carrying out annealing, its mechanical property does not reach requirement, can cracking after the product welding.
Summary of the invention
The problem that the present invention will solve is exactly to propose a kind of extraordinary bell furnace that can reach special material batch annealing conditional request, promptly improved non-standard bell furnace with top forced convection structure, thus reach the technical requirements of this product.
Main technical schemes of the present invention: the non-standard bell furnace of a kind of top forced convection, comprise furnace base, furnace bottom cross resting support and bonnet, it is characterized in that the bonnet top is provided with convection fan, has corrugated inner cover wind-guiding bucket in the bonnet.
Usually, also be distributed with the base heating unit on the furnace base of the present invention, be coated with corrugated deck on the heating unit; The furnace base side is provided with inlet mouth; Double-layer seal circle, water jacket are arranged between furnace base and the bonnet, and said double-layer seal circle internal layer is an asbestos packing, and skin is a silicon rubber loop; The bonnet top is provided with U type tensimeter.
Compare with traditional bell furnace, characteristics of the present invention are following:
1. the forced convection air supply motor of traditional bell furnace is under furnace base, and forced convection air supply motor of the present invention is at the bonnet top.This design has improved the homogeneity of temperature in the stove greatly, has guaranteed the consistence of the upper and lower quality product in the stove.
2. do not have heating unit under the stove seat of traditional bell furnace, under the stove seat of the present invention heating unit is arranged.
3. traditional bell furnace does not require the stopping property of bonnet, and furnace base of the present invention and bonnet time have been adopted asbestos packing and silicon rubber loop two seals, and furnace pressure has reached 2000Pa when making work.
4. the protection device of air that send of the present invention does not feed protection gas from traditional base bottom, but feeds nitrogen in bottom sides, after high-power fan stirs, has protected product to realize low or non oxidizing on the one hand, makes furnace temperature further even on the other hand.
5. the present invention can be widely used in the neck city that other bell furnace uses.
The improved non-standard bell furnace of the present invention; Can reach the requirement on the mechanical property of new steel belt annealing back; Be particularly useful for the steel band annealing of BSYE-N material, and filled up the blank of this steel band product of China, opened the technical bottleneck that restricts this top technological development.With adopt hydrogen shield property atmosphere to compare economy and security all improves a lot, contrast unshielded atmosphere and then realized the low or non oxidizing heating again.Compare with adopting traditional bell furnace, production cost reduces greatly.
Description of drawings
Figure below is the structural representation of bell furnace of the present invention.
Among the figure, 1-furnace base; 2-heating unit; 3-corrugated deck; 4-double-layer seal circle; 5-water jacket; 6-furnace bottom cross resting support; 7-bonnet; 8-convection fan; 9-corrugated inner cover wind-guiding bucket; 10-U type tensimeter.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described in detail.
Embodiment: forced convection non-standard bell furnace structure in present embodiment top mainly comprises furnace base 1, furnace bottom cross resting support 6 and bonnet 7 shown in accompanying drawing 1, and it mainly improves is that bonnet 7 tops are provided with convection fan 8, and corrugated inner cover wind-guiding bucket 9 is arranged in the bonnet 7.
Be distributed with base heating unit 2 on the furnace base 1 of present embodiment, be coated with corrugated deck 3 on the heating unit 2; Furnace base 1 side is provided with inlet mouth; Between furnace base 1 and the bonnet 7 water jacket 5 is arranged; Bonnet 7 tops are provided with U type tensimeter 10; Between furnace base 1 and the bonnet 7 double-layer seal circle 4 is arranged, the internal layer of double-layer seal circle 4 is an asbestos packing, and skin is a silicon rubber loop.
Do not have heating unit on the furnace base of tradition bell furnace, on the furnace base 1 of present embodiment heating unit 2 is arranged; The forced convection air supply motor of tradition bell furnace is under furnace base, and the forced convection air supply motor of present embodiment is at the bonnet top, and promptly convection fan 8.This design has improved the homogeneity of temperature in the stove greatly, has guaranteed the consistence of the upper and lower quality product in the stove.
The tradition bell furnace does not require the stopping property of bonnet, and present embodiment has adopted asbestos packing and silicon rubber loop two seals between furnace base 1 and bonnet 7, and promptly the double-layer seal circle 4, and furnace pressure has reached 2000Pa when making work.
The protection device of air that send of present embodiment bell furnace does not feed protection gas from traditional furnace base bottom; But in bottom sides; After high-power fan stirs; Feed nitrogen through furnace base 1 lateral inlet mouth, protected product to realize low or non oxidizing on the one hand, make furnace temperature further even on the other hand.
Claims (6)
1. the non-standard bell furnace of top forced convection comprises furnace base, furnace bottom cross resting support and bonnet, it is characterized in that the bonnet top is provided with convection fan, has corrugated inner cover wind-guiding bucket in the bonnet.
2. bell furnace as claimed in claim 1 is characterized in that the double-layer seal circle is arranged between furnace base and the bonnet.
3. bell furnace as claimed in claim 1 is characterized in that the furnace base side is provided with inlet mouth.
4. bell furnace as claimed in claim 1 is characterized in that between furnace base and the bonnet water jacket being arranged.
5. bell furnace as claimed in claim 1 is characterized in that the bonnet top is provided with U type tensimeter.
6. bell furnace as claimed in claim 1 is characterized in that being distributed with the base heating unit on the furnace base, is coated with corrugated deck on the heating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100620166A CN102586581A (en) | 2012-03-12 | 2012-03-12 | Top forced convection type non-standard bell-type furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100620166A CN102586581A (en) | 2012-03-12 | 2012-03-12 | Top forced convection type non-standard bell-type furnace |
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| Publication Number | Publication Date |
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| CN102586581A true CN102586581A (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100620166A Pending CN102586581A (en) | 2012-03-12 | 2012-03-12 | Top forced convection type non-standard bell-type furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893263A (en) * | 2020-07-23 | 2020-11-06 | 台州市清引环保科技有限公司 | Hood-type annealing furnace with rotatable furnace platform and uniform heating function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191241A (en) * | 1997-02-20 | 1998-08-26 | 夏立德 | Bell tempering furnace |
| CN201309955Y (en) * | 2008-11-19 | 2009-09-16 | 宋长洪 | Bell-type annealing furnace |
| CN201648477U (en) * | 2010-02-23 | 2010-11-24 | 宝山钢铁股份有限公司 | High-temperature strong-convection circulatory atmosphere cover type heat treating furnace with separated fan and heat area |
-
2012
- 2012-03-12 CN CN2012100620166A patent/CN102586581A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191241A (en) * | 1997-02-20 | 1998-08-26 | 夏立德 | Bell tempering furnace |
| CN201309955Y (en) * | 2008-11-19 | 2009-09-16 | 宋长洪 | Bell-type annealing furnace |
| CN201648477U (en) * | 2010-02-23 | 2010-11-24 | 宝山钢铁股份有限公司 | High-temperature strong-convection circulatory atmosphere cover type heat treating furnace with separated fan and heat area |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893263A (en) * | 2020-07-23 | 2020-11-06 | 台州市清引环保科技有限公司 | Hood-type annealing furnace with rotatable furnace platform and uniform heating function |
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Application publication date: 20120718 |