CN210569978U - Hearth of experimental electric furnace - Google Patents
Hearth of experimental electric furnace Download PDFInfo
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- CN210569978U CN210569978U CN201920863149.0U CN201920863149U CN210569978U CN 210569978 U CN210569978 U CN 210569978U CN 201920863149 U CN201920863149 U CN 201920863149U CN 210569978 U CN210569978 U CN 210569978U
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- thermal expansion
- hearth
- expansion joint
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- 238000002474 experimental method Methods 0.000 claims abstract description 8
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 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
- 239000002912 waste gas Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000000630 rising effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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Abstract
The utility model relates to an experiment electric stove furnace, it includes, annular oven (2), and be located respectively bell (1) and stove bottom (3) of both sides about oven (2), be equipped with at least one thermal expansion seam (21) and at least one exhaust hole (22) on oven (2), thermal expansion seam (21) reach exhaust hole (22) are followed link up in the direction of height of oven (2), just thermal expansion seam (21) by the inner wall of oven (2) extends to the outer wall direction exhaust hole (22) are last. On one hand, the electric furnace hearth meets the requirement of thermal expansion of the inner circle of the middle-layer furnace wall in a high-temperature region of the hearth in the temperature rising process, and ensures effective release of thermal stress; on the other hand, the waste gas in the hearth can be smoothly discharged through the thermal expansion joint and the exhaust holes communicated with the thermal expansion joint; and radial heat radiation and heat conduction of the hearth can be prevented, and the energy-saving effect of the hearth is improved.
Description
Technical Field
The utility model relates to an electric stove manufacturing technology field, concretely relates to experiment electric stove furnace for experiment electric stove.
Background
The experimental electric furnace is mostly applied to experiments and small-batch production in universities and colleges and industrial and mining enterprises. The furnace body of experiment electric stove includes shell, furnace and is located the heat preservation between shell and furnace, installs electric heating element in the furnace, turns into heat energy with electric energy through electric heating element, heats the article in the furnace, and the higher the temperature in the furnace is the thicker the thickness that needs the furnace wall.
The experimental electric furnace hearth is generally obtained by integrally extruding or grouting a heavy high-temperature refractory material and then firing the material at high temperature, and has the defects of large heat conductivity coefficient, large heat capacity and low yield. Meanwhile, the integral hearth is usually subjected to thermal expansion at the initial use stage, and particularly when the temperature rise or cooling speed is high, the integral temperature of the hearth is uneven or the thermal stress is too high, so that the hearth is deformed or even cracked, and the service life of the hearth is reduced; the integral structure of the traditional hearth makes the waste gas difficult to discharge when heating the objects and has corrosion effect on the electric heating elements, thereby increasing the use and maintenance cost of the electric furnace.
Therefore, the problems that the radial thermal radiation and the heat conduction of the existing electric furnace are high and energy conservation is not facilitated are solved, and the hearth structure of the experimental electric furnace is necessary to be reasonably designed, so that the effective release of the thermal stress is ensured, the waste gas in the hearth can be smoothly discharged, and the hearth of the experimental electric furnace has a good energy-saving effect.
Disclosure of Invention
In order to solve the technical problem, the utility model provides an experiment electric stove furnace, it includes, annular oven, and be located respectively the furnace roof and the stove bottom of both sides about the oven, be equipped with at least one thermal expansion seam and at least one exhaust hole on the oven, the thermal expansion seam reaches the exhaust hole is followed link up in the direction of height of oven the oven, just the thermal expansion seam by the outside wall direction of inner wall of oven extends to on the exhaust hole.
The utility model discloses according to the actual conditions needs of bell jar formula, over-and-under type and well formula experiment electric stove, the position of furnace roof and stove bottom can exchange, as long as guarantee both sides can about the oven.
For the experimental electric furnace hearth, the included angle between the thermal expansion joint and the diameter direction of the furnace wall is more than 0 degrees and less than or equal to 70 degrees. Preferably, the included angle between the thermal expansion joint and the diameter direction of the furnace wall is 30-70 degrees.
In the experimental electric furnace hearth, the thermal expansion joint extends to 1/5-4/5 of the thickness of the furnace wall along the inner wall of the furnace wall and is communicated with the exhaust hole. Preferably, the thermal expansion joint extends along the inner wall of the furnace wall to 2/3 of the thickness of the furnace wall.
In the experimental electric furnace hearth, the furnace wall is uniformly provided with a plurality of thermal expansion joints and exhaust holes.
In the experimental electric furnace hearth, the furnace wall is formed by stacking a plurality of layers of annular wall bodies along the height direction. The contact surface of the wall body of the adjacent layer is a step surface.
In the experimental electric furnace hearth, each layer of annular wall body of the furnace wall is formed by splicing a plurality of building blocks, and the contact surface of adjacent building blocks is a step surface.
In the experimental electric furnace hearth, the furnace top is provided with a heating element and a thermocouple mounting hole; the furnace bottom is provided with a furnace mouth and a furnace door matched with the furnace mouth.
In the experimental electric furnace hearth, the furnace top, the furnace wall and the furnace bottom are made of high-temperature resistant ceramic fiber plates.
Compared with the prior art, the technical proposal of the utility model has the advantages that,
1. in the experimental electric furnace hearth of the utility model, the thermal expansion gaps which are communicated in the height direction are arranged on the furnace wall of the middle layer and are communicated with the exhaust holes, compared with the existing expansion gaps which completely penetrate through the furnace wall, on one hand, the requirement of thermal expansion of the inner circle of the furnace wall of the middle layer positioned in a high temperature region in the temperature rising process of the furnace hearth is met, and the effective release of thermal stress is ensured; on the other hand, the waste gas in the hearth can be smoothly discharged through the thermal expansion joint and the exhaust holes communicated with the thermal expansion joint; and radial heat radiation and heat conduction of the hearth can be prevented, and the energy-saving effect of the hearth is improved.
2. In order to avoid the radiation loss caused by a plurality of thermal expansion seams which are arranged along the diameter direction of the inner circle and are vertical to each layer surface, the utility model discloses in, make its trend be a certain angle, preferably between 30 ~ 70 with the diameter when setting up the thermal expansion seam. The structure can reduce partial heat loss, and can properly reduce the thickness of the hearth under the condition that the temperature of the outer wall of the hearth is the same, so that the electric furnace is lighter.
3. The thermal expansion joint of the utility model extends to 1/5-4/5 of the thickness of the furnace wall along the inner wall of the furnace wall and is communicated with the exhaust hole, preferably between 2/3 of the thickness of the furnace wall. The design mode can release thermal stress to a greater extent, simultaneously reduces thermal radiation and heat conduction, and further improves the energy-saving effect of the hearth.
4. The utility model discloses a middle level oven adopts the multilayer wall body to pile up and forms, and need not to adopt inorganic high temperature binder, has consequently reduced the degree of difficulty of furnace production, has improved the production environment, can show and shorten production cycle, reduce cost and improvement production efficiency, and the product percent of pass also can improve by a wide margin. And each layer is assembled in a step mode, each layer of annular wall body is assembled in a step mode through a plurality of identical equal partition building blocks, heat radiation is further avoided, and the experimental electric furnace hearth is assembled in a modular design, standardized production, an assembled structure and no adhesive, so that only the building blocks at the damaged parts need to be replaced after the individual building blocks are damaged in use, maintenance cost is reduced, and maintenance time is saved. The multilayer assembled hearth has small wall thickness and heat capacity, can solve the problems of large heat storage, low temperature rise and fall speed and overlarge energy consumption of the integral thick-wall hearth, is particularly suitable for the requirement of an experimental electric furnace, and meets the requirements of energy conservation and emission reduction.
5. The utility model discloses a furnace adopts high temperature resistant ceramic fiberboard to make, and high temperature resistant ceramic fiberboard's thermal conductivity does: 0.2W/m.K (1000 ℃ C.), the thermal conductivity of air is: 0.0760W/m.K (1000 ℃ C.), the former being about three times as much as the latter. Therefore, adopt the production of multilayer pin-connected panel high temperature resistant ceramic fiber furnace's experimental electric stove and the current electric stove of same specification save the electric energy through the measurement comparison and reach more than 30% to have light in weight, simple structure, processing are easy, installation and maintenance convenient advantage.
Drawings
FIG. 1 is a schematic structural view of a furnace wall in a hearth of an experimental electric furnace according to the present invention;
FIG. 2 is a schematic view of the construction of the blocks that make up the furnace wall;
FIG. 3 is a schematic structural view of a furnace chamber of the experimental electric furnace suitable for bell jar type or lifting type;
FIG. 4 is a schematic structural view of a hearth of the well-type experimental electric furnace of the present invention;
the reference numbers in the figures denote: 1-furnace top, 11-thermocouple mounting hole, 2-furnace wall, 21-thermal expansion gap, 22-exhaust hole, 23-wall body, 24-building block, 25-step surface and 3-furnace bottom.
Detailed Description
The invention is further described with reference to the following figures and examples.
As in fig. 3, fig. 4 shows that the utility model discloses an experimental electric stove furnace, it includes, annular oven 2, and be located respectively the furnace roof 1 and the stove bottom 3 of both sides about oven 2, the utility model discloses according to the actual conditions needs of bell jar formula, over-and-under type and well formula experimental electric stove, furnace roof 1 can exchange with the position of stove bottom 3, and fig. 3 is the furnace that is suitable for bell jar formula or over-and-under type experimental electric stove, furnace roof 1 is located the upside, and stove bottom 3 is located the downside, and fig. 4 is the furnace that is suitable for well formula experimental electric stove, furnace roof 1 is located the downside, and stove bottom 3 is located the upside. As shown in fig. 1, the furnace wall 2 is provided with at least one thermal expansion joint 21 and at least one exhaust hole 22, the thermal expansion joint 21 and the exhaust hole 22 penetrate the furnace wall 2 in the height direction of the furnace wall 2, and the thermal expansion joint 21 extends from the inner wall of the furnace wall 2 to the outer wall direction of the exhaust hole 22.
The core technical proposal of the utility model is that the thermal expansion joint 21 in the furnace wall 2 is communicated with the exhaust hole 22, thereby meeting the requirement of thermal expansion of the inner circle of the middle layer furnace wall 2 in the high temperature area in the temperature rising process of the furnace chamber and ensuring the effective release of thermal stress; on the other hand, the waste gas in the hearth can be smoothly discharged through the thermal expansion joint 21 and the exhaust holes 22 communicated with the thermal expansion joint 21; and radial heat radiation and heat conduction of the hearth can be prevented, and the energy-saving effect of the hearth is improved.
As the utility model discloses above-mentioned technical scheme's concrete structure, as shown in FIG. 1, thermal expansion joint 21 with the diameter direction of oven 2 has certain contained angle, and this kind of structure can avoid having now many that set up along interior circle diameter direction and each floor vertically thermal expansion joint to bring radiation loss, reduces partial heat-conduction, under the same condition of furnace outer wall temperature, can suitably reduce furnace thickness, makes electric stove weight loss. The angle is selected to be 0 DEG & lt, a & lt, 70 DEG, preferably 30 DEG & lt, a & lt, 70 deg.
In order to release the thermal stress to a greater extent, simultaneously reduce thermal radiation and heat conduction, further improve the energy-saving effect of the hearth. The expansion joint 21 extends along the inner wall of the furnace wall 2 to 1/5-4/5 of the thickness of the furnace wall 2 and is communicated with the exhaust holes 22, and 2/3 of the thickness of the furnace wall is selected to be the most. Wherein, the width of the thermal expansion gap 21 is 0.1mm-10mm, and the optimal width is 2-5 mm. The diameter of the vent hole is 3-30mm, and the optimal diameter is 5-10 mm.
In order to ensure uniform thermal stress release of the furnace wall 2, as shown in fig. 1, the furnace wall 2 is provided with two thermal expansion joints 21 and two exhaust holes 22. According to the inner diameter of the furnace wall, 3, 4 or more than three strips can be uniformly arranged according to the condition.
In order to avoid cracking of the integrated high-temperature furnace due to thermal expansion or excessive thermal stress, the furnace wall 2 in the embodiment is formed by stacking a plurality of layers of wall bodies 23. And the contact surface of the wall body 23 of the adjacent layer is a step surface. This further avoids heat radiation.
Meanwhile, in the present embodiment, each layer of the wall body 23 of the furnace wall 2 is formed by splicing a plurality of blocks 24, and as shown in fig. 2, the contact surface of the adjacent blocks 24 is a step surface 25. Because the experimental electric furnace hearth adopts the modular design, the assembled structure and the binderless assembly, only the plate at the damaged part needs to be replaced after the damaged plate is used, the maintenance cost is reduced, and the maintenance time is saved. The multilayer assembled hearth has small wall thickness and heat capacity, can solve the problems of large heat storage, low temperature rise and fall speed and overlarge energy consumption of the integral thick-wall hearth, and is particularly suitable for the requirements of energy conservation and emission reduction.
The furnace top 1 in the experimental electric furnace hearth of the utility model is provided with a heating element and a thermocouple mounting hole 11; the furnace bottom 3 is provided with a furnace mouth and a furnace door matched with the furnace mouth. The furnace top 1, the furnace wall 2 and the furnace bottom 3 are made of high-temperature resistant ceramic fiber plates.
The utility model discloses the design of thermal expansion seam 21 is not only limited to in the experimental electric furnace, and industrial furnace is also applicable equally the technical scheme of the utility model.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (11)
1. The utility model provides an experiment electric stove furnace, its includes, annular oven wall (2), and be located respectively furnace wall (2) upper and lower both sides furnace roof (1) and stove bottom (3), its characterized in that: the furnace wall (2) is provided with at least one thermal expansion joint (21) and at least one exhaust hole (22), the thermal expansion joint (21) and the exhaust hole (22) penetrate through the furnace wall (2) along the height direction of the furnace wall (2), and the thermal expansion joint (21) extends from the inner wall of the furnace wall (2) to the outer wall direction of the exhaust hole (22).
2. The experimental electric furnace hearth according to claim 1, characterized in that: the included angle between the thermal expansion joint (21) and the diameter direction of the furnace wall (2) is more than 0 degree and less than or equal to 70 degrees.
3. The experimental electric furnace hearth according to claim 2, characterized in that: the included angle between the thermal expansion joint (21) and the diameter direction of the furnace wall (2) is preferably 30-70 degrees.
4. The experimental electric furnace hearth according to any one of claims 1 to 3, characterized in that: the thermal expansion joint (21) extends along the inner wall of the furnace wall (2) to 1/5-4/5 of the thickness of the furnace wall (2) and is communicated with the exhaust hole.
5. The experimental electric furnace hearth of claim 4, wherein: the thermal expansion joint extends along the inner wall of the furnace wall to 2/3 of the thickness of the furnace wall.
6. The experimental electric furnace hearth according to any one of claims 1 to 3, characterized in that: the furnace wall (2) is uniformly provided with a plurality of thermal expansion joints (21) and exhaust holes (22).
7. The experimental electric furnace hearth according to any one of claims 1 to 3, characterized in that: the furnace wall (2) is formed by stacking a plurality of layers of wall bodies (23).
8. The experimental electric furnace hearth of claim 7, wherein: the contact surface of the wall body (23) of the adjacent layer is a step surface.
9. The experimental electric furnace hearth of claim 7, wherein: each layer of wall body (23) of the furnace wall (2) is formed by splicing a plurality of building blocks (24), and the contact surface of the adjacent building blocks (24) is a step surface (25).
10. An experimental electric furnace hearth according to any one of claims 1 to 3, 8 and 9, characterized in that: the furnace top (1) is provided with a heating element and a thermocouple mounting hole (11); the furnace bottom (3) is provided with a furnace opening and a furnace door matched with the furnace opening.
11. The experimental electric furnace hearth according to any one of claims 1 to 3, characterized in that: the furnace top (1), the furnace wall (2) and the furnace bottom (3) are made of high-temperature resistant ceramic fiber plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920863149.0U CN210569978U (en) | 2019-06-10 | 2019-06-10 | Hearth of experimental electric furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920863149.0U CN210569978U (en) | 2019-06-10 | 2019-06-10 | Hearth of experimental electric furnace |
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| CN210569978U true CN210569978U (en) | 2020-05-19 |
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| CN201920863149.0U Withdrawn - After Issue CN210569978U (en) | 2019-06-10 | 2019-06-10 | Hearth of experimental electric furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145938A (en) * | 2019-06-10 | 2019-08-20 | 苏州鼎安科技有限公司 | A kind of multilayer assembled electric stove hearth |
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2019
- 2019-06-10 CN CN201920863149.0U patent/CN210569978U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145938A (en) * | 2019-06-10 | 2019-08-20 | 苏州鼎安科技有限公司 | A kind of multilayer assembled electric stove hearth |
| CN110145938B (en) * | 2019-06-10 | 2024-01-19 | 苏州鼎安科技有限公司 | Multi-layer assembled electric furnace hearth |
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Granted publication date: 20200519 Effective date of abandoning: 20240119 |
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