CN104101403A - Testing device for lower limit of molten aluminum - Google Patents
Testing device for lower limit of molten aluminum Download PDFInfo
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- CN104101403A CN104101403A CN201410348941.4A CN201410348941A CN104101403A CN 104101403 A CN104101403 A CN 104101403A CN 201410348941 A CN201410348941 A CN 201410348941A CN 104101403 A CN104101403 A CN 104101403A
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- lower limit
- aluminium liquid
- metal probe
- protection tube
- aluminium
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Abstract
The invention relates to a liquid level testing device for liquid nonferrous metals, in particular to a testing device for lower limit of molten aluminum. The testing device comprises an aluminum melting furnace, a metal probe A, a temperature sensor, a control device and an alarm device; the temperature sensor, the temperature controller, the alarm device and the metal probe A form a loop; the metal probe A extends from the upper end of the aluminum melting furnace to the upper limit of the molten aluminum; the temperature sensor extends from the upper end of the aluminum melting furnace to the lower limit of the molten aluminum. The testing device for the lower limit of the molten aluminum has the advantages that a positional signal of the lower limit of the molten aluminum is converted into a temperature signal through a thermocouple and a protective tube, the temperature signal is displayed by the temperature controller, operational stability of an automatic liquid supply device is ensured by alarming of the alarm device, the trouble of frequently changing the metal probe is avoided meanwhile, and production cost and labor cost are saved.
Description
Technical field
The present invention relates to a kind of liquid level proving installation of liquid non-ferrous metal, especially a kind of aluminium liquid lower limit proving installation.
Background technology
The test of aluminium liquid lower limit generally needs two metal probes, and metal probe must be inserted in aluminium liquid, and aluminium and aluminium alloy aggressivity under molten condition is very strong, particularly aluminium slag, the corrosivity such as its composition cryolite, lustrous and transparent spar, fluorine alumina are very strong, make generally be no more than 10 days the serviceable life of metal probe, not only work efficiency is lower to change so frequently metal probe, production cost, human cost are also increased, make the automatic liquid supply device can not steady operation simultaneously, how to address these problems and become industry problem demanding prompt solution.
Summary of the invention
For the weak point existing in the problems referred to above, the invention provides that a kind of cost is lower, efficiency is higher, can ensure the aluminium liquid lower limit proving installation of automatic liquid supply device steady operation.
For achieving the above object, the invention provides a kind of aluminium liquid lower limit proving installation, comprise molten aluminium stove, metal probe A, described metal probe A is 2, for testing aluminium liquid upper limit; In addition, also comprise temperature sensing device, control device, warning device, described temperature sensing device, temperature control equipment, warning device and metal probe A form loop, described metal probe A only extends to aluminium liquid upper limit from described molten aluminium furnace upper end, and described temperature sensing device only extends to aluminium liquid lower limit from described molten aluminium furnace upper end.
Preferably, described temperature sensing device is made up of thermopair and protection tube, and described protection tube is enclosed within thermopair outside, and the lower end of thermopair is near protection tube inner chamber bottom surface, and described protection tube is selected from Si
3n
4protection tube and Si
3n
4one in-SiC protection tube.
Preferably, described control device is temperature controller.
Preferably, described warning device is bi-coloured light acoustic alarm device.
Beneficial effect of the present invention is: the present invention adopts Si
3n
4or Si
3n
4-SiC is as the material of protection tube, and silicon nitride Si
3n
4or silicon nitride combined silicon carbide Si
3n
4-SiC is that current anti-aluminium liquid corrodes best bi-material, can use more than 1 year in aluminium liquid, simultaneously, because aluminium and silicon nitride are all highly heat-conductive materials, the coefficient of heat conductivity of air is lower, when aluminium liquid is during higher than lower limit, the protection tube that contains silicon nitride passes to the temperature of thermopair and the actual temperature difference of aluminium liquid is little, and when aluminium liquid is during lower than lower limit, the protection tube that contains silicon nitride passes to the temperature of thermopair and the actual temperature difference of aluminium liquid is larger, thermocouple assay temperature sharply declines, and probe temperature can show by temperature controller, when this temperature is during lower than set temperature on temperature controller, warning device will be reported to the police, thereby send the signal that needs additive liq.That is to say that the present invention changes position signalling into temperature signal output, thereby ensure the stable operation of automatic liquid supply device, avoided the trouble of frequent replacing metal probe, saved production cost and human cost.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure: 1, molten aluminium stove; 2, metal probe A; 3, protection tube; 4, thermopair; 5, bi-coloured light acoustic alarm device; 6, temperature controller;
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further explained.
A kind of aluminium liquid lower limit proving installation described in the embodiment of the present invention, as shown in Figure 1, comprises molten aluminium stove 1, metal probe A2, and described metal probe A2 is 2, for testing aluminium liquid upper limit; In addition, also comprise thermopair 4, protection tube 3, temperature controller 6, bi-coloured light acoustic alarm device 5, described protection tube 3 is enclosed within thermopair 4 outsides, and the lower end of thermopair 4 is near protection tube 3 inner chamber bottom surfaces, and described protection tube 3 is selected from Si
3n
4protection tube and Si
3n
4one in-SiC protection tube; described thermopair 4, temperature controller 6, bi-coloured light acoustic alarm device 5 pass through connection with metal probe A2; described metal probe A2 only extends to aluminium liquid upper limit from described molten aluminium stove 1 upper end, described protection tube 3 only extends to aluminium liquid lower limit from described molten aluminium stove 1 upper end.
The present invention adopts the additional silicon nitride Si of thermopair 4
3n
4or silicon nitride combined silicon carbide Si
3n
4-SiC protection tube 3, replaces original metal probe, both can prevent that metal probe is corroded, and has avoided the trouble of frequent replacing metal probe, has also saved production cost and human cost simultaneously, has ensured the stable operation of automatic liquid supply device.
Specific works principle is: when liquid aluminum is during higher than lower limit, because aluminium coefficient of heat conductivity is very high, 20 DEG C time, be 203.5w/ (m DEG C), silicon nitride is also highly heat-conductive material, 20 DEG C time, coefficient of heat conductivity is 16.7w/ (m DEG C), therefore the temperature that thermopair 4 senses is substantially identical with aluminium liquid actual temperature, and can respond to rapidly; When aluminium liquid is during lower than protection tube lower end; between aluminium liquid and protection tube 3 across air; and the coefficient of heat conductivity of air in the time of 700 DEG C only has 0.0671w/ (m DEG C); so the probe temperature that thermopair 4 senses sharply declines; probe temperature and aluminium liquid actual temperature have formed larger temperature difference; the temperature value now showing on temperature controller 6 is lower than technique minimum temperature; these temperature controller 6 actuatings of relay; and then connect bi-coloured light acoustic alarm device 5 and automatically control watering system, thereby realize automatic liquid supply.
Due to silicon nitride Si
3n
4or silicon nitride combined silicon carbide Si
3n
4-SiC is that current anti-aluminium liquid corrodes best bi-material, can use one to two year in aluminium liquid, so device provides reliable guarantee to the stable operation of production line for aluminium liquid automatic makeup.
Only as described above, be only preferred embodiment of the present invention, such as professional who are familiar with this art.After understanding technological means of the present invention, natural energy, according to actual needs, is changed under instruction of the present invention.Therefore all equal variation and modifications of doing according to the present patent application the scope of the claims, all should still remain within the scope of the patent.
Claims (6)
1. an aluminium liquid lower limit proving installation, comprise molten aluminium stove, metal probe A, it is characterized in that: also comprise temperature sensing device, control device, warning device, described temperature sensing device, temperature control equipment, warning device and metal probe A form loop, described metal probe A only extends to aluminium liquid upper limit from described molten aluminium furnace upper end, and described temperature sensing device only extends to aluminium liquid lower limit from described molten aluminium furnace upper end.
2. aluminium liquid lower limit proving installation as claimed in claim 1, is characterized in that: described temperature sensing device is made up of thermopair and protection tube, and described protection tube is enclosed within thermopair outside, and the lower end of thermopair is near protection tube inner chamber bottom surface.
3. aluminium liquid lower limit proving installation as claimed in claim 1, is characterized in that: described control device is temperature controller.
4. aluminium liquid lower limit proving installation as claimed in claim 1, is characterized in that: described warning device is bi-coloured light acoustic alarm device.
5. aluminium liquid lower limit proving installation as claimed in claim 1, is characterized in that: described metal probe A is 2, for testing aluminium liquid upper limit.
6. aluminium liquid lower limit proving installation as claimed in claim 1, is characterized in that: described protection tube is selected from Si
3n
4protection tube, Si
3n
4any one in-SiC protection tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348941.4A CN104101403A (en) | 2014-07-21 | 2014-07-21 | Testing device for lower limit of molten aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348941.4A CN104101403A (en) | 2014-07-21 | 2014-07-21 | Testing device for lower limit of molten aluminum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104101403A true CN104101403A (en) | 2014-10-15 |
Family
ID=51669735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410348941.4A Pending CN104101403A (en) | 2014-07-21 | 2014-07-21 | Testing device for lower limit of molten aluminum |
Country Status (1)
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| CN (1) | CN104101403A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210463A (en) * | 1987-10-02 | 1989-06-07 | Atomic Energy Authority Uk | Electrode assembly |
| JPH11326013A (en) * | 1998-05-18 | 1999-11-26 | Mitsubishi Heavy Ind Ltd | Liquid level detector |
| CN1721106A (en) * | 2004-07-05 | 2006-01-18 | 贺利氏电子耐特国际股份公司 | Container for melting metal, its use and method for determining interlayer |
| CN2807314Y (en) * | 2005-06-22 | 2006-08-16 | 四川启明星铝业有限责任公司 | Molten metal level limitation apparatus |
| CN102615256A (en) * | 2012-04-18 | 2012-08-01 | 大亚车轮制造有限公司 | Aluminum liquid intrusive type heating heat insulation system |
| CN203940899U (en) * | 2014-07-21 | 2014-11-12 | 南通高新工业炉有限公司 | A kind of aluminium liquid lower limit proving installation |
-
2014
- 2014-07-21 CN CN201410348941.4A patent/CN104101403A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210463A (en) * | 1987-10-02 | 1989-06-07 | Atomic Energy Authority Uk | Electrode assembly |
| JPH11326013A (en) * | 1998-05-18 | 1999-11-26 | Mitsubishi Heavy Ind Ltd | Liquid level detector |
| CN1721106A (en) * | 2004-07-05 | 2006-01-18 | 贺利氏电子耐特国际股份公司 | Container for melting metal, its use and method for determining interlayer |
| CN2807314Y (en) * | 2005-06-22 | 2006-08-16 | 四川启明星铝业有限责任公司 | Molten metal level limitation apparatus |
| CN102615256A (en) * | 2012-04-18 | 2012-08-01 | 大亚车轮制造有限公司 | Aluminum liquid intrusive type heating heat insulation system |
| CN203940899U (en) * | 2014-07-21 | 2014-11-12 | 南通高新工业炉有限公司 | A kind of aluminium liquid lower limit proving installation |
Non-Patent Citations (2)
| Title |
|---|
| 周杏鹏 等: "《检测技术及系统设计》", 30 September 1996 * |
| 肖亚庆 等: "《铝加工技术实用手册》", 31 January 2005 * |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141015 |