CN110145938A - A kind of multilayer assembled electric stove hearth - Google Patents
A kind of multilayer assembled electric stove hearth Download PDFInfo
- Publication number
- CN110145938A CN110145938A CN201910498302.9A CN201910498302A CN110145938A CN 110145938 A CN110145938 A CN 110145938A CN 201910498302 A CN201910498302 A CN 201910498302A CN 110145938 A CN110145938 A CN 110145938A
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- Prior art keywords
- furnace
- furnace wall
- wall
- thermal expansion
- electric stove
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- 239000000835 fiber Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 10
- 230000008646 thermal stress Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 238000012546 transfer Methods 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 210000000038 chest Anatomy 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010054949 Metaplasia Diseases 0.000 description 1
- 239000002196 Pyroceram Substances 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
- F27B17/02—Furnaces of a kind not covered by any preceding group specially designed for laboratory use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0043—Floors, hearths
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a kind of multilayer assembled electric stove hearths, it includes, the furnace wall (2) of annular, and it is located at the bell (1) and furnace bottom (3) of the furnace wall (2) two sides up and down, the furnace wall (2) is equipped at least one thermal expansion gap (21) and at least one gas vent (22), the thermal expansion gap (21) and the gas vent (22) penetrate through the furnace wall (2) in the short transverse of the furnace wall (2), and the thermal expansion gap (21) is extended on the gas vent (22) from the inner wall of the furnace wall (2) to outer wall direction.On the one hand above-mentioned electric stove hearth meets the needs that middle layer furnace wall inner circle of the burner hearth in temperature-rise period positioned at high-temperature region thermally expands, it is ensured that thermal stress is released effectively；On the other hand, the exhaust gas in burner hearth can be smoothly discharged by thermal expansion gap and the gas vent being connected to thermal expansion gap；Also, heat radiation and the heat transfer that can also prevent burner hearth radial direction, improve the energy-saving effect of burner hearth.
Description
Technical field
The present invention relates to electric furnace manufacturing technology fields, and in particular to a kind of multilayer assembled electric stove hearth, for testing electricity
Furnace.
Background technique
Experimental electric furnace is applied in universities and colleges, the experiment in industrial and mining enterprises and small lot production more.The furnace of experimental electric furnace
Body includes shell, burner hearth and the insulating layer between shell and burner hearth, installs heating element in burner hearth, will by heating element
Electric energy is converted into thermal energy, heats to the article in burner hearth, and the temperature in burner hearth the high, needs the thickness of hearth wall thicker.
Experimental electric furnace burner hearth is fired through high temperature again after generalling use heavy high-temperature refractory integral extrusion or slurry molding
It obtains, the disadvantage is that thermal coefficient is big, thermal capacitance is big low with yield rate.Meanwhile this monoblock type burner hearth using initial stage often because
For thermal expansion, especially when heating or cooling velocity are very fast, burner hearth bulk temperature is uneven or thermal stress is excessive will lead to burner hearth
Deformation is even cracked, and burner hearth service life is reduced；And exhaust gas of traditional burner hearth globality structure when heating article is difficult to exclude,
There is corrosiveness to heating element, therefore, increases the use and maintenance cost of electric furnace.
For this reason, it may be necessary to solve existing electric furnace radial direction heat radiation and heat transfer is higher, it is unfavorable for the problem of energy conservation, it is necessary to logical
Rational design experimental electric furnace chamber structure is crossed, so that providing one kind ensures that thermal stress is released effectively, and can be by exhaust gas in burner hearth
It is smoothly discharged, the preferable experimental electric furnace burner hearth of energy-saving effect.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of multilayer assembled electric stove hearth comprising, annular furnace
Wall, and be located at the furnace wall up and down two sides furnace roof and furnace bottom, the furnace wall be equipped at least one thermal expansion gap and
At least one gas vent, the thermal expansion gap and the gas vent penetrate through the furnace wall in the short transverse of the furnace wall, and
The thermal expansion gap is extended on the gas vent from the inner wall of the furnace wall to outer wall direction.
Actual conditions needs of the present invention according to bell-jar, lift and well formula experimental electric furnace, the position of furnace roof and furnace bottom
Setting can be interchanged, as long as guaranteeing the two sides above and below the furnace wall.
For above-mentioned multilayer assembled electric stove hearth, the diametric angle of the thermal expansion gap and the furnace wall
For 0 ° of а≤70 ° <.Preferably, the diametric angle of the thermal expansion gap and the furnace wall is 30 °≤а≤70 °.
In above-mentioned multilayer assembled electric stove hearth, the thermal expansion gap extends to the furnace wall thickness along the furnace wall inner wall
1/5-4/5 at and be connected to the gas vent.Preferably, the thermal expansion gap extends to the furnace wall along the furnace wall inner wall
At the 2/3 of thickness.
In above-mentioned multilayer assembled electric stove hearth, several thermal expansion gaps and described are uniformly provided on the furnace wall
Gas vent.
In above-mentioned multilayer assembled electric stove hearth, the furnace wall is stacked by several layers endless wall along short transverse.
The contact surface of the wall body of adjacent layer is step surface.
In above-mentioned multilayer assembled electric stove hearth, the endless wall of every layer of the furnace wall spliced by several building blocks and
At the contact surface of adjacent block is step surface.
In above-mentioned multilayer assembled electric stove hearth, the furnace roof is equipped with heater element and thermocouple mounting hole；The furnace bottom
Fire door equipped with fire door and with fire door cooperation.
In above-mentioned multilayer assembled electric stove hearth, the furnace roof, the furnace wall and the furnace bottom are fine using refractory ceramics
Dimension plate is made.
The above technical solution of the present invention has the following advantages over the prior art,
1, in multilayer assembled electric stove hearth of the invention, the thermal expansion penetrated through in short transverse is opened up on furnace wall in middle level
Seam, and thermally expand gap and be connected to gas vent, it is compared compared to the existing expansion joint completely through furnace wall, on the one hand meets furnace
The needs that middle layer furnace wall inner circle of the thorax in temperature-rise period positioned at high-temperature region thermally expands, it is ensured that thermal stress is released effectively；Another party
The exhaust gas in burner hearth can be smoothly discharged by thermal expansion gap and the gas vent being connected to thermal expansion gap for face；Also, it can also hinder
The only heat radiation of burner hearth radial direction and heat transfer, improve the energy-saving effect of burner hearth.
2. bringing radiation along a plurality of thermal expansion gap vertical with each level that inner circle diametrical direction opens up in order to avoid existing
It loses, in the present invention, its trend and diameter is made when opening up thermal expansion gap at an angle, between preferably 30 °~70 °.This
Kind structure can reduce Some thermal heat loss, in the identical situation of hearth outer wall temperature, can suitably reduce burner hearth thickness, make electricity
Furnace is lighter.
3. thermal expansion gap of the invention extended at the 1/5-4/5 of the furnace wall thickness along the furnace wall inner wall and with it is described
Gas vent connection, preferably between the 2/3 of furnace wall thickness.This design method can discharge thermal stress to a greater extent, simultaneously
Heat radiation and heat transfer are reduced, the energy-saving effect of burner hearth is further increased.
4. middle layer furnace wall of the invention is stacked using multilayer wall body, without using inorganic high-temperature agglomerant, therefore
The difficulty for reducing burner hearth production, improves production environment, can significantly shorten the production cycle, reduces cost and improves production effect
Rate, product qualification rate can also greatly improve.And each interlayer is assembled using step, every layer of endless wall is using multiple identical etc.
Divide the splicing of building block step, further avoids heat radiation, and multilayer assembled electric stove hearth is because using modularized design, mark
Quasi- metaplasia produces, assembled structure and binder free are assembled, and distinctly building block only needs to change the building block of damaged location after damaging in use,
It reduces maintenance cost, save maintenance time.Multilayer assembled burner hearth wall thickness is small, and thermal capacity is small, can solve monoblock type heavy wall furnace
The problem that thorax accumulation of heat is big, warming and cooling rate is low and energy consumption is excessive needs particularly suitable for test-type electric furnace, meets energy-saving and emission-reduction and want
It asks.
5. burner hearth of the invention is made of High-temperature resistant ceramic fiber plate, the thermal conductivity of High-temperature resistant ceramic fiber plate are as follows:
0.2W/mK(1000 DEG C), the thermal conductivity of air are as follows: 0.0760 W/mK(1000 DEG C), the former is approximately three times of the latter.Cause
This, using the experimental electric furnace and the existing electric furnace of same specification of multilayer assembled pyroceram fibre burner hearth of the present invention production
Compare through metering and save electric energy up to 30% or more, and has that light-weight, structure is simple, handling ease, installation and easy to maintain excellent
Point.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of furnace wall in multilayer assembled electric stove hearth of the invention；
Fig. 2 is the structural schematic diagram for forming the building block of furnace wall；
Fig. 3 is the structural schematic diagram that the present invention is suitable for bell-jar or lift multilayer assembled electric stove hearth；
Fig. 4 is the structural schematic diagram that the present invention is suitable for well formula multilayer assembled electric stove hearth；
Appended drawing reference indicates in figure are as follows: 1- furnace roof, 11- thermocouple mounting hole, and the furnace wall 2-, 21- thermal expansion gap, 22- gas vent,
23- wall body, 24- building block, 25- step surface, 3- furnace bottom.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As Fig. 3, Fig. 4 show multilayer assembled electric stove hearth of the invention comprising, annular furnace wall 2, and respectively
Furnace roof 1 and furnace bottom 3 positioned at about 2 two sides of furnace wall, the present invention is according to bell-jar, lift and well formula experimental electric furnace
Actual conditions need, and furnace roof 1 and the position of furnace bottom 3 can be interchanged, and Fig. 3 is the furnace suitable for bell-jar or lift experimental electric furnace
Thorax, the furnace roof 1 are located at upside, and furnace bottom 3 is located at downside, and Fig. 4 is the burner hearth suitable for well formula experimental electric furnace, and the furnace roof 1 is located at
Downside, furnace bottom 3 are located at upside.As shown in Figure 1, the furnace wall 2 is equipped at least one thermal expansion gap 21 and at least one exhaust
Hole 22, the thermal expansion gap 21 and the gas vent 22 penetrate through the furnace wall 2 in the short transverse of the furnace wall 2, and described
Thermal expansion gap 21 is extended on the gas vent 22 from the inner wall of the furnace wall 2 to outer wall direction.
The above are core of the invention technical solution, thermal expansion gap 21 is connected to gas vent 22 in above-mentioned furnace wall 2, on the one hand
Meet the needs that middle layer furnace wall 2 inner circle of the burner hearth in temperature-rise period positioned at high-temperature region thermally expands, it is ensured that thermal stress is released effectively；
On the other hand, the exhaust gas in burner hearth can be smoothly discharged by thermal expansion gap 21 and the gas vent being connected to thermal expansion gap 21 22；
Also, heat radiation and the heat transfer that can also prevent burner hearth radial direction, improve the energy-saving effect of burner hearth.
As the specific structure of above-mentioned technical proposal of the present invention, as shown in Figure 1, the thermal expansion gap 21 and the furnace wall 2
Diametrical direction there is certain angle, this structure can be vertical to avoid existing a plurality of and each level opened up along inner circle diametrical direction
Straight thermal expansion gap brings radiation loss, and reducing part heat transfer can suitably subtract in the identical situation of hearth outer wall temperature
Small hearth thickness makes electric furnace weight saving.Above-mentioned angle Selection is 0 ° of а≤70 ° <, preferably 30 °≤а≤70 °.
In order to discharge thermal stress to a greater extent, while heat radiation and heat transfer are reduced, further increases the energy conservation of burner hearth
Effect.The dilatation joint 21 along the 1/5-4/5 that 2 inner wall of furnace wall extends to 2 thickness of furnace wall and with the gas vent
22 connections, are most selected as at the 2/3 of furnace wall thickness.Wherein, the width of the thermal expansion gap 21 is 0.1mm-10mm, and optimal width is
2-5mm.The diameter of gas vent is 3-30mm, optimum diameter 5-10mm.
In order to ensure the thermal stress release of above-mentioned furnace wall 2 is uniform, as shown in Figure 1, uniformly opening up two institutes on the furnace wall 2
State thermal expansion gap 21 and the gas vent 22.According to the inner diameter size of the furnace wall, 3,4 according to circumstances can also be uniformly opened up
Item and the above item.
In order to avoid integral type high-temperature burner hearth because of thermal expansion or thermal stress is excessive that burner hearth is caused to crack, in the present embodiment
The furnace wall 2 is stacked by several layers wall body 23.And the contact surface of the wall body 23 of adjacent layer is step surface.It in this way can be with
Further avoid heat radiation.
Meanwhile in the present embodiment, the wall body 23 of every layer of the furnace wall 2 is spliced by several building blocks 24, such as Fig. 2
Shown, the contact surface of adjacent block 24 is step surface 25.Multilayer assembled electric stove hearth is because using modularized design, pin-connected panel knot
Structure and binder free are assembled, and distinctly plate only needs to change the plate of damaged location after damaging in use, shorten maintenance cost, save
Maintenance time.Multilayer assembled burner hearth wall thickness is small, and thermal capacity is small, can solve that monoblock type heavy wall burner hearth accumulation of heat is big, heating and cooling are fast
The low and excessive problem of energy consumption is spent, particularly suitable for energy-saving and emission-reduction requirement.
The furnace roof 1 in the multilayer assembled electric stove hearth of the invention is equipped with heater element and thermocouple mounting hole
11；The furnace bottom 3 is equipped with fire door and the fire door with fire door cooperation.The furnace roof 1, the furnace wall 2 and the furnace bottom 3 use
High-temperature resistant ceramic fiber plate is made.
The design of thermal expansion gap 21 is not limited only in experimental electric furnace in the present invention, and industrial furnace is applied equally to skill of the invention
Art scheme.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of multilayer assembled electric stove hearth comprising, annular furnace wall (2), and it is located at the furnace wall (2) up and down
The furnace roof (1) and furnace bottom (3) of two sides, it is characterised in that: the furnace wall (2) is equipped at least one thermal expansion gap (21) and at least
One gas vent (22), the thermal expansion gap (21) and the gas vent (22) penetrate through in the short transverse of the furnace wall (2)
The furnace wall (2), and the thermal expansion gap (21) extends to the gas vent to outer wall direction from the inner wall of the furnace wall (2)
(22) on.
2. a kind of multilayer assembled electric stove hearth according to claim 1, it is characterised in that: the thermal expansion gap (21) with
The diametric angle of the furnace wall (2) is 0 ° of а≤70 ° <.
3. a kind of multilayer assembled electric stove hearth according to claim 2, it is characterised in that: the thermal expansion gap (21) with
The diametric angle of the furnace wall (2) is preferably 30 °≤а≤70 °.
4. multilayer assembled electric stove hearth according to claim 1 to 3, it is characterised in that: the thermal expansion gap (21)
It extends at the 1/5-4/5 of the furnace wall (2) thickness along the furnace wall (2) inner wall and is connected to the gas vent；Preferably, institute
Thermal expansion gap is stated to extend at the 2/3 of the furnace wall thickness along the furnace wall inner wall.
5. multilayer assembled electric stove hearth according to claim 1 to 3, it is characterised in that: on the furnace wall (2)
It is even to offer several thermal expansion gaps (21) and the gas vent (22).
6. multilayer assembled electric stove hearth according to claim 1 to 3, it is characterised in that: the furnace wall (2) if by
Dried layer wall body (23) stacks.
7. multilayer assembled electric stove hearth according to claim 6, it is characterised in that: the wall body (23) of adjacent layer
Contact surface is step surface.
8. multilayer assembled electric stove hearth according to claim 6, it is characterised in that: described in every layer of the furnace wall (2)
Wall body (23) is spliced by several building blocks (24), and the contact surface of the adjacent building block (24) is step surface (25).
9. any multilayer assembled electric stove hearth in -3,7,8 according to claim 1, it is characterised in that: the furnace roof
(1) heater element and thermocouple mounting hole (11) are equipped with；The furnace bottom (3) is equipped with fire door and the fire door with fire door cooperation.
10. multilayer assembled electric stove hearth according to claim 1 to 3, it is characterised in that: the furnace roof (1), institute
It states furnace wall (2) and the furnace bottom (3) is made of High-temperature resistant ceramic fiber plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498302.9A CN110145938B (en) | 2019-06-10 | 2019-06-10 | Multi-layer assembled electric furnace hearth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498302.9A CN110145938B (en) | 2019-06-10 | 2019-06-10 | Multi-layer assembled electric furnace hearth |
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| Publication Number | Publication Date |
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| CN110145938A true CN110145938A (en) | 2019-08-20 |
| CN110145938B CN110145938B (en) | 2024-01-19 |
Family
ID=67590718
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110145938B (en) | 2024-01-19 |
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