CN1323277C - Lining thickness detector of smelting furnace - Google Patents
Lining thickness detector of smelting furnace Download PDFInfo
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- CN1323277C CN1323277C CNB2005100946508A CN200510094650A CN1323277C CN 1323277 C CN1323277 C CN 1323277C CN B2005100946508 A CNB2005100946508 A CN B2005100946508A CN 200510094650 A CN200510094650 A CN 200510094650A CN 1323277 C CN1323277 C CN 1323277C
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- voltage
- furnace lining
- furnace
- resistor
- lining
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Abstract
The present invention relates to a device for detecting the thickness of a furnace lining of a metallurgical furnace. The present invention is characterized in that one end of a rectification bridge 1 outputting low-voltage DC voltage is directly connected with an induction coil 4 through a choke inductor L; the other end of the rectification bridge 1 is connected with a furnace bottom electrode 5 through a resistor R2. The current passing through the furnace lining is utilized to judge whether the furnace lining has the danger and phenomenon of leaking or not. When the furnace lining is normal, the current passing through the resistor R2 is very small; the voltage division on the resistor R2 is also very small. At the moment, a comparator N outputs negative voltage; a warning circuit does not act. If the furnace lining generates low-resistance phenomena, for instance, the furnace lining thins and metal liquid is leaked, the phenomena can all result in the low resistance of the furnace lining; at the moment, the voltage drop on the resistor R2 waxes. When the voltage drop exceeds the setting voltage of the comparator, a potentiometer RP2 provides the voltage drop; the comparator N outputs positive voltage; the warning circuit acts and emits a warning signal. The device is used for crucible type metallurgical induction heating furnaces. The present invention has the advantages that the device does not need to lay electrodes in the furnace lining and enhances furnace-building efficiency, and the device decreases interference, is not easy to generate mistaken actions, and increases working reliability and safety.
Description
Technical field
What the present invention relates to is a kind of lining thickness monitoring device that is used for the crucible type metallurgical smelting furnace.Belong to metallurgical smelting furnace alarm technique field
Background technology
The runout warning device of Cai Yonging in the past, general need lay the electrode of stainless steel cloth as test voltage in furnace lining when tamped lining, and brickwork work is cumbersome.And be subject to disturb, misoperation takes place.
Summary of the invention
The objective of the invention is to overcome the defective that prior art exists, propose a kind of lining thickness monitoring device.It can not be used in and lay stainless steel cloth in the furnace lining, improves the brickwork work efficiency.
Technical solution of the present invention: an end that it is characterized in that exporting the rectifier bridge of low-voltage dc voltage directly is connected with inductive coil by choke induction L, and the other end then links to each other with hearth electrode by resistance R 2.The other end of resistance R 2 joins by phase inverter A and comparer N.Inductive coil is arranged on the outside of furnace lining.
The electric current that causes according to the furnace lining changes in resistance changes the actual operating position of judging furnace lining.
Advantage of the present invention: saved the stainless steel wire of in furnace lining, laying.And, the suffered interference of device is reduced greatly owing to need not lay stainless steel wire, and be difficult for misoperation takes place, increased reliability, the security of device.
Description of drawings
Accompanying drawing 1 is the example structure synoptic diagram of lining thickness detector of smelting furnace.
Among the figure 1 is rectifier bridge, the 2nd, cable, the 3rd, and the metallurgical induction heater, the 4th of crucible type, inductive coil, the 5th, hearth electrode, A are that phase inverter, L are that choke induction, R1, R2 are that resistance, RP2 are that potentiometer, N are comparer (model can be used LM324).
Embodiment
The contrast accompanying drawing, its structure is that the output terminal of the rectifier bridge 1 of output low-voltage dc voltage directly is connected with inductive coil 4 by choke induction L, another output terminal of rectifier bridge 1 then links to each other with hearth electrode 5 by resistance R 2, the other end of resistance R 2 joins by phase inverter A and comparer N, inductive coil 4 is arranged on the outside of furnace lining
During work, external power supply, is added between inductive coil 4 and the hearth electrode 5 by rectifier bridge output low-voltage dc voltage through the rectifier bridge rectification by the transformer step-down.Rectifier bridge output low-voltage dc voltage one end is direct and inductive coil 4 by choke induction L.The other end joins by resistance R 2 and hearth electrode 5.When furnace lining just often, very little by the electric current of resistance R 2, the dividing potential drop on the resistance R 2 is also very little, comparer N output negative voltage at this moment, warning circuit is failure to actuate.If furnace lining generation low resistance phenomenon such as furnace lining attenuation, the molten metal seepage all can cause the furnace lining low resistance, and it is big that the pressure drop on the resistance R 2 at this moment becomes, when surpassing the setting voltage of comparer N, RP2 is given by potentiometer, and comparer N exports positive voltage, alerting signal is sent in the warning circuit action.This device is used for the metallurgical induction heater of crucible type.
Claims (1)
1, lining thickness detector of smelting furnace, the output terminal that it is characterized in that exporting the rectifier bridge of low-voltage dc voltage directly is connected with inductive coil (4) by choke induction L, another output terminal of rectifier bridge (1) then links to each other with hearth electrode (5) by resistance (R2) end, the other end of resistance (R2) joins by phase inverter (A) and comparer (N), and inductive coil (4) is arranged on the outside of furnace lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100946508A CN1323277C (en) | 2005-10-07 | 2005-10-07 | Lining thickness detector of smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100946508A CN1323277C (en) | 2005-10-07 | 2005-10-07 | Lining thickness detector of smelting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1746611A CN1746611A (en) | 2006-03-15 |
| CN1323277C true CN1323277C (en) | 2007-06-27 |
Family
ID=36166246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100946508A Active CN1323277C (en) | 2005-10-07 | 2005-10-07 | Lining thickness detector of smelting furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN1323277C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322794B (en) * | 2013-06-26 | 2014-09-24 | 中冶长天国际工程有限责任公司 | Method and device for detecting changes of rotary kiln lining |
| CN111750689A (en) * | 2020-07-31 | 2020-10-09 | 安徽富凯特材有限公司 | AOD furnace lining monitoring and early warning system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0065517A1 (en) * | 1980-11-17 | 1982-12-01 | Caterpillar Tractor Co | Surface roughness gauge. |
| CN2050153U (en) * | 1989-07-04 | 1989-12-27 | 中国原子能科学研究院 | Monitoring device for furnace liner thickness |
| CN1054831A (en) * | 1991-02-04 | 1991-09-25 | 冶金工业部钢铁研究总院 | Blast furnace and industrial furnace kiln lining thickness measuring apparatus and method |
| JPH05201447A (en) * | 1991-09-04 | 1993-08-10 | Tetra Alfa Holdings Sa | Mouth opening device for container package |
| CN2634427Y (en) * | 2003-06-10 | 2004-08-18 | 吴志平 | Detector for metallurgical furnace wall thickness |
-
2005
- 2005-10-07 CN CNB2005100946508A patent/CN1323277C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0065517A1 (en) * | 1980-11-17 | 1982-12-01 | Caterpillar Tractor Co | Surface roughness gauge. |
| CN2050153U (en) * | 1989-07-04 | 1989-12-27 | 中国原子能科学研究院 | Monitoring device for furnace liner thickness |
| CN1054831A (en) * | 1991-02-04 | 1991-09-25 | 冶金工业部钢铁研究总院 | Blast furnace and industrial furnace kiln lining thickness measuring apparatus and method |
| JPH05201447A (en) * | 1991-09-04 | 1993-08-10 | Tetra Alfa Holdings Sa | Mouth opening device for container package |
| CN2634427Y (en) * | 2003-06-10 | 2004-08-18 | 吴志平 | Detector for metallurgical furnace wall thickness |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1746611A (en) | 2006-03-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Zhenwu Electric Furnace Co., Ltd. Assignor: Zhu Xingfa|Han Zhicheng Contract fulfillment period: 2008.8.18 to 2013.8.18 contract change Contract record no.: 2008320001054 Denomination of invention: Lining thickness detector of smelting furnace Granted publication date: 20070627 License type: Exclusive license Record date: 20081024 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.18 TO 2013.8.18; CHANGE OF CONTRACT Name of requester: SUZHOU ZHENWU ELECTRIC STOVE CO., LTD. Effective date: 20081024 |