CN202509103U - Furnace lining leakage detector for medium-frequency induction heating furnace - Google Patents
Furnace lining leakage detector for medium-frequency induction heating furnace Download PDFInfo
- Publication number
- CN202509103U CN202509103U CN2011205439680U CN201120543968U CN202509103U CN 202509103 U CN202509103 U CN 202509103U CN 2011205439680 U CN2011205439680 U CN 2011205439680U CN 201120543968 U CN201120543968 U CN 201120543968U CN 202509103 U CN202509103 U CN 202509103U
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- furnace
- molten steel
- leakage
- furnace lining
- induction heating
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- General Induction Heating (AREA)
Abstract
The utility model discloses a furnace lining leakage detector for a medium-frequency induction heating furnace. The furnace lining leakage detector mainly comprises a furnace body, molten steel, a stainless steel wire, a current limiting resistor, a stopping capacitor, a leakage current meter, a mutual inductor and a detection comparison circuit, wherein when the molten steel in a furnace body leaks, the molten steel is provided with high voltage of more than 3,000 volts; and the voltage forms discharging current on the ground through the stainless steel wire, the current limiting resistor, the stopping capacitor, the leakage current meter and the mutual inductor, so that the voltage of the molten steel is not too high, and the safety of an operator can be guaranteed. The operator observes the leakage current meter, if the value on the leakage current meter is more than 50 mA, a furnace lining is required to be maintained and timely replaced; if current in the furnace body is more than a set current value of 55 mA, the furnace body stops working; and therefore, accidents caused by furnace lining leakage and furnace leakage can be effectively prevented.
Description
Technical field
The utility model relates to a kind of intermediate frequency induction heating device, is specifically related to a kind of Medium Frequency Induction Heating Furnace lining and lets out photodetector.
Background technology
The Medium Frequency Induction Heating Furnace furnace lining is to prepare knotting according to a certain percentage by various refractory materialss to form.In fusion process, molten steel constantly washes away the furnace lining wall, after date in the time of a section; Molten steel can wash away attenuation with the furnace lining inwall, will strengthen the electric current of furnace lining internal induction circle to molten steel, surpasses the charged threshold values of molten steel easily; Cause that furnace lining lets out electricity, and molten steel can ooze out from suffer erosive furnace lining wall crack, the high temperature of thousands of degree can cause great destruction to induction coil and yoke; Cause that stove leakage accident takes place, and jeopardizes personnel safety and device security.Therefore, must in fusion process, detect lining thickness in real time, in time give the alarm, effectively prevent the generation of runout accident, effectively protect personnel safety and device security.
The utility model content
The utility model mainly provides a kind of Medium Frequency Induction Heating Furnace furnace lining that can in time detect and lets out electricity, effectively prevents the generation of runout accident, effectively protects a kind of Medium Frequency Induction Heating Furnace furnace lining of personnel safety and device security to let out photodetector.
A kind of Medium Frequency Induction Heating Furnace furnace lining is let out photodetector and is mainly comprised body of heater (12), molten steel (13), Stainless Steel Wire (14), current-limiting resistance (16), stopping condenser (15), leakage current table (3), mutual inductor (17), detects comparison circuit (18) composition.
The principle of work that Medium Frequency Induction Heating Furnace prevention furnace lining is let out electricity: alive part comprises induction coil, furnace lining, molten steel in the Medium Frequency Induction Heating Furnace; For avoiding existing high voltage electric and excessive current to exist in the body of heater; Be provided with the molten steel ground-electrode in the molten steel; There is the high-voltage of one more than 3000 volt over the ground in the molten steel ground-electrode in the actual moving process; Just because of such one to " " the existence of voltage of intermediate frequency, induction coil, furnace lining, molten steel, molten steel ground-electrode have just constituted a complete loop line.
Body of heater molten steel ground-electrode is buried step: bury the Stainless Steel Wire of one 304 model in the bottom of body of heater, diameter Ф 0.5mm, overcoat diameter Ф 0.6mm insulation thimble.Beaten behind the furnace lining upper end of Stainless Steel silk and just exposed bottom of furnace body, can guarantee so effectively to contact with molten iron, the lower end of Stainless Steel Wire is exposed through the hole of asbestos ring and is done and there emerged a the wiring ring and install screw.Guide on the runout protecting sheet through electric wire; The grounded part of runout protecting sheet needs effectively to contact with the earth; Stake resistance uses reflection good through curstomer`s site, can effectively avoid because of the electric leakage accident that the furnace lining problem causes, and has improved intermediate frequency furnace device security performance greatly.
The principle of work of runout protection detector: along with the body of heater lengthening of duration of service; The continuous attenuation of furnace lining; Approximately behind 120-160 stove of use, the equivalent resistance of furnace lining is 5-6K Europe, and corresponding leakage current is about 50mA; The threshold value of runout protection be can think like this, runout and output alarm signal whether judged through the current signal size of current transformer relatively.Indicate the variation in thickness that reflects furnace lining through observing the leakage current table simultaneously.
Detect the whether program of runout of Medium Frequency Induction Heating Furnace: first: switch is beaten in that " debugging is " under the state; Regulate " electric current is given " potentiometer clockwise, make leakage current table indication 50mA, regulate first step warning clockwise potentiometer is set; Make first step alarm lamp bright, this moment, hummer rang; Second: continue to transfer big " electric current is given " potentiometer, make leakage current table indication 55mA, regulate second stage warning clockwise potentiometer is set, make second stage alarm lamp bright, this moment, the runout PL of mainboard was bright, can stop Medium Frequency Induction Heating Furnace work; The the 3rd: " electric current is given " potentiometer is recalled to the end counterclockwise; Equipment control switch closed again opened; " electric current is given " potentiometer is adjusted to 50mA and 55mA sees whether report to the police clockwise, reports to the police potentiometer is set if there is error to proofread and correct the first step and the second stage once more; The 4th: switch is beaten " work " state, choose " stove 1 " and " stove 2 " system selector switch, equipment formally drops into runout and detects operation.
Can detect Medium Frequency Induction Heating Furnace through above step and whether surpass and let out electric threshold values and runout, observe the leakage current table,, show and should in time change to the time of the furnace lining that needs repairing if its value surpasses 50 mA; Through setting, can set the numerical value of safety, thereby effectively prevent furnace lining to let out the generation of electricity and runout accident through electric current to " electric current is given " potentiometer.
Description of drawings
Accompanying drawing 1: a kind of Medium Frequency Induction Heating Furnace furnace lining is let out the principle of work schematic circuit of photodetector;
Accompanying drawing 2: a kind of Medium Frequency Induction Heating Furnace furnace lining is let out photodetector figure is set;
Accompanying drawing 3: a kind of Medium Frequency Induction Heating Furnace furnace lining is let out photodetector protecting sheet electrical schematic diagram.
Embodiment
A kind of Medium Frequency Induction Heating Furnace furnace lining is let out photodetector and is mainly comprised body of heater (12), molten steel (13), Stainless Steel Wire (14), current-limiting resistance (16), stopping condenser (15), leakage current table (3), mutual inductor (17), detects comparison circuit (18) composition; When runout takes place in the molten steel (13) in the body of heater (12); Can make molten steel (13) have the high pressure of volt more than 3000; This voltage forms a leakage current through Stainless Steel Wire (14), current-limiting resistance (16), stopping condenser (15), leakage current table (3), mutual inductor (17) to the earth; Make molten steel (13) voltage can be too not high, guarantee operator's security.Detect comparison circuit (18) simultaneously and detect this leakage current and be higher than safety value 55 mA, the output signal stops Medium Frequency Induction Heating Furnace work.
The intermediate frequency furnace lining is let out the electro-detection method: first: switch is beaten under " debugging " (1) state; Regulate " electric current is given " potentiometer (2) clockwise; Make leakage current table (3) indication 50mA; Regulate first step warning clockwise potentiometer (4) is set, make first step alarm lamp bright (5), hummer this moment (8) rings; Second: continue to transfer big " electric current is given " potentiometer (2); Make leakage current table (3) indication 55mA, regulate second stage warning clockwise potentiometer (6) is set, make second stage alarm lamp bright (7); This moment, the runout of mainboard was protected, and can stop Medium Frequency Induction Heating Furnace work; " electric current is given " potentiometer (2) is recalled to the end counterclockwise; Equipment control switch closed again opened; " electric current is given " potentiometer (2) is adjusted to 50mA and 55mA sees whether report to the police clockwise, reports to the police and potentiometer (4) is set potentiometer (6) is set with second stage warning if there is error to proofread and correct the first step once more; The 4th: switch is beaten " work " (9) state, choose " stove 1 " (10) and " stove 2 " (11) system selector switch, equipment formally drops into runout and detects operation.
Can detect Medium Frequency Induction Heating Furnace through above step and whether surpass and let out electric threshold values and runout, observe leakage current table (3),, show and should in time change to the time of the furnace lining that needs repairing if its value surpasses 50 mA; Through setting to " electric current is given " potentiometer (2), can set the numerical value of safety current, if electric current surpasses the 55mA current values of setting in the body of heater, machine will quit work, thereby effectively prevents furnace lining to let out the generation of electricity and runout accident.
Claims (1)
1. a Medium Frequency Induction Heating Furnace furnace lining is let out photodetector and is mainly comprised body of heater (12), molten steel (13), Stainless Steel Wire (14), current-limiting resistance (16), stopping condenser (15), leakage current table (3), mutual inductor (17), detects comparison circuit (18) and form; It is characterized in that: molten steel is provided with the molten steel ground-electrode in (13); Bury a Stainless Steel Wire (14) in the bottom of body of heater (12); Body of heater (12) bottom is just exposed in the upper end of Stainless Steel silk (14); The lower end of Stainless Steel Wire (14) is exposed through the hole of asbestos ring and is done and there emerged a the wiring ring and install screw, guides on the runout protecting sheet through electric wire, and the grounded part of runout protecting sheet needs effectively contact with the earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205439680U CN202509103U (en) | 2011-12-23 | 2011-12-23 | Furnace lining leakage detector for medium-frequency induction heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205439680U CN202509103U (en) | 2011-12-23 | 2011-12-23 | Furnace lining leakage detector for medium-frequency induction heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202509103U true CN202509103U (en) | 2012-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205439680U Expired - Fee Related CN202509103U (en) | 2011-12-23 | 2011-12-23 | Furnace lining leakage detector for medium-frequency induction heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202509103U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034157A (en) * | 2014-07-02 | 2014-09-10 | 徐心亿 | Runout alarm circuit of crucible electric induction furnace |
| CN105783511A (en) * | 2016-04-27 | 2016-07-20 | 佛山市高捷工业炉有限公司 | Device and method for checking damage and leakage of smelting furnace in non-contact induction manner |
| CN110243182A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of intermediate frequency furnace leak detection protection system |
| 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 |
-
2011
- 2011-12-23 CN CN2011205439680U patent/CN202509103U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034157A (en) * | 2014-07-02 | 2014-09-10 | 徐心亿 | Runout alarm circuit of crucible electric induction furnace |
| CN105783511A (en) * | 2016-04-27 | 2016-07-20 | 佛山市高捷工业炉有限公司 | Device and method for checking damage and leakage of smelting furnace in non-contact induction manner |
| CN110243182A (en) * | 2019-07-10 | 2019-09-17 | 无锡应达工业有限公司 | A kind of intermediate frequency furnace leak detection protection system |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20131223 |