CN109737743B - Automatic bridging breaking device for vacuum induction smelting furnace - Google Patents
Automatic bridging breaking device for vacuum induction smelting furnace Download PDFInfo
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- CN109737743B CN109737743B CN201910030384.4A CN201910030384A CN109737743B CN 109737743 B CN109737743 B CN 109737743B CN 201910030384 A CN201910030384 A CN 201910030384A CN 109737743 B CN109737743 B CN 109737743B
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Abstract
The invention relates to the technical field of metal smelting equipment, and discloses an automatic bridge breaking device for a vacuum induction smelting furnace. The length of the short pricks is smaller than that of the long pricks, the low ends of the long pricks preferentially act on the top surface of the bridge, the stress area of the top surface of molten metal is further reduced, the acting force of the low ends of the long pricks on the top surface of the bridge is increased, the low ends of the long pricks preferentially prick into the bridge, the structure of the bridge is changed, the internal structure of the bridge is further changed during the short pricks penetrate into the bridge, the bridge is automatically disassembled, the bridge slides into the molten metal, the bridge formed by the dead blockage of furnace burden is broken, the bridge does not need to be broken manually in vacuum, and the smelting efficiency is high.
Description
Technical Field
The invention relates to the technical field of metal smelting equipment, in particular to an automatic bridge breaking device for a vacuum induction smelting furnace.
Background
The vacuum induction smelting furnace is a smelting device which firstly melts metal through induced current to generate heat under the vacuum condition and then pours liquid metal into a mould to obtain a metal cast ingot, and mainly comprises a power supply input system, a vacuum system and a furnace body, wherein the furnace body comprises a vacuum shell, an induction coil, a crucible and the like, the induction coil is wound outside the crucible, when the vacuum induction smelting furnace works, alternating current passes through the induction coil to generate an alternating magnetic field around the induction coil, and a conductive material in the furnace generates an induction potential under the action of the alternating magnetic field to enable the surface of the furnace to form current at a certain depth, namely eddy current, so that a large amount of heat is generated in the furnace to melt the furnace.
1. The compactness of the furnace burden stacked in the crucible is difficult to control, the situation that the furnace burden stacked on the upper part in the crucible is too tight and blocked occurs sometimes, the furnace burden is smelted under the situation, the furnace burden on the upper part can be erected to form a bridge, the bridge is separated from a lower metal molten pool and cannot effectively conduct heat and melt, after the vacuum needs to be broken, the bridge is broken by manually using tools such as a long-handle hammer, and then the furnace burden is vacuumized to continue smelting, the operation process is very troublesome, and the smelting efficiency is low.
2. The carbon-oxygen reaction is severe under the vacuum high-temperature state, the generated carbon monoxide gas is sprayed out from the molten metal, so that the molten metal is sprayed, the sprayed molten metal is sprayed onto the bridging frame, the furnace materials in the bridging frame and the inner wall of the crucible are bonded together, the bridging frame is firmer, the molten metal on the bridging frame is cooled and solidified in the manual bridging breaking process, the firmness of the bridging frame is further increased, the difficulty in breaking the bridging frame is high, the bridging breaking time is prolonged, and the smelting efficiency is low.
Aiming at the problems, the invention provides an automatic bridge breaking device for a vacuum induction melting furnace.
Disclosure of Invention
The invention provides an automatic bridge breaking device for a vacuum induction melting furnace, which can provide a downward force for furnace burden on the upper layer of a crucible, so that a bridge formed by blocked furnace burden is automatically broken, and meanwhile, the automatic bridge breaking device can move up and down in an alternating magnetic field in the vacuum induction melting furnace, repeatedly impacts the bridge, increases the force borne by the bridge, ensures that the bridge sputtered with molten metal is broken, does not need to break the vacuum to manually break the bridge, and has small breaking difficulty and high melting efficiency.
The invention provides the following technical scheme: the utility model provides an automatic device that breaks bridge for vacuum induction melting furnace, includes the crucible, the inside of crucible is equipped with the molten metal, the inside of crucible is equipped with the bridge that is located the molten metal top, the inside of crucible is equipped with the moving part that is located the bridge top, the inside of moving part is equipped with electrically conductive chamber, electrically conductive chamber's inside is equipped with the conducting ring, the inside of moving part is equipped with the cavity that is located electrically conductive chamber below, the bottom surface of crucible is equipped with short thorn, the bottom surface of crucible is equipped with long thorn, the outside of crucible is equipped with induction coil.
Furthermore, the movable part is annular, and the material of movable part is the same with the material of crucible.
Further, the inner diameter value of the top of the movable piece is larger than that of the bottom of the movable piece.
Furthermore, the cross section of the conductive cavity is trapezoidal.
Furthermore, the short thorns and the long thorns are conical in shape.
Furthermore, the short thorns and the long thorns are alternately distributed on the bottom surface of the movable piece, and the length value of the short thorns is smaller than that of the long thorns.
Furthermore, the shape of the cross section of the conductive ring is matched with the conductive cavity, and a buffer cavity is formed between the top surface of the conductive ring and the inner wall of the conductive cavity.
Further, the conducting ring is a ring cast by red copper.
The invention has the following beneficial effects:
1. the short prick and the long prick are arranged in a conical manner, so that the moving part, the conducting ring, the gravity of the short prick and the long prick is concentrated at the lower end of the short prick and the long prick, the stress area of the top surface of the bridge is reduced, the acting force of the contact part of the top surface of the bridge and the lower end of the short prick and the long prick is increased, the length of the short prick is smaller than that of the long prick, the lower end of the long prick preferentially acts on the top surface of the bridge, the stress area of the top surface of molten metal is further reduced, the acting force of the lower end of the long prick on the top surface of the bridge is increased, the lower end of the long prick preferentially prick into the bridge, the structure of the bridge is changed, the internal structure of the bridge is further changed, the bridge is automatically disassembled, the molten metal slips into the molten.
2. Through the setting of conducting ring, make the inside of moving part form the conductive loop, when the alternating magnetic field that induction coil formed passes the moving part, the inside of conducting ring can produce induced-current, make the conducting ring receive upwards and downward alternating's ampere force in the magnetic field of alternation, the conducting ring shakes from top to bottom at the effect of ampere force drive moving part, make short thorn and long thorn strike the bridging repeatedly, increase the effort of short thorn and long thorn to the bridging, ensure that short thorn and long thorn can break the bridging that the splash has the metal liquid, the metal liquid on bridging surface can not solidify, it is little to break the degree of difficulty, it is efficient to smelt.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the bottom surface of the movable member of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic top view of the movable member of FIG. 1.
In the figure: 1-crucible, 2-molten metal, 3-bridging, 4-moving part, 5-conductive cavity, 6-conductive ring, 7-cavity, 8-short thorn, 9-long thorn and 10-induction coil.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an automatic bridge-breaking device for a vacuum induction melting furnace comprises a crucible 1, molten metal 2 is arranged inside the crucible 1, a bridge 3 located above the molten metal 2 is arranged inside the crucible 1, a movable member 4 located above the bridge 3 is arranged inside the crucible 1, a conductive cavity 5 is arranged inside the movable member 4, a conductive ring 6 is arranged inside the conductive cavity 5, the conductive ring 6 can still form a loop inside the conductive cavity 5 after being completely melted, a cavity 7 located below the conductive cavity 5 is arranged inside the movable member 4, the size of the cavity 7 is used for controlling the buoyancy force applied to the automatic bridge-breaking device in the molten metal 2, so that the automatic bridge-breaking device can float on the liquid level of the molten metal 2 without interfering with melting of furnace burden, short thorns 8 are arranged on the bottom surface of the crucible 1, long thorns 9 are arranged on the bottom surface of the crucible 1, an induction coil 10 is arranged outside the crucible 1.
The movable member 4 is annular, so that the weight of the automatic bridge-breaking device is reduced, the movable member 4 vibrates up and down along with the change frequency of the alternating magnetic field, the vibration frequency is high, the bridge 3 is broken, the movable member 4 is made of the same material as the crucible 1, the fire resistance of the movable member 4 is made of the same material as that of the crucible 1, and the automatic bridge-breaking device can work normally.
The inner diameter value of the top of the moving part 4 is larger than that of the bottom of the moving part, so that the weight of the automatic bridge-breaking device is reduced, the sensitivity of the moving part 4 vibrating up and down along with the change frequency of the alternating magnetic field is increased, the vibration frequency is high, and the bridge 3 can be broken.
The cross section of the conductive cavity 5 is trapezoidal, the conductive ring 6 is limited, the conductive ring 6 can drive the movable part 4 to move up and down under the action of ampere force, the movable part 4 drives the short thorns 8 and the long thorns 9 to move up and down and impact the bridge 3, and the bridge 3 is broken.
The short thorns 8 and the long thorns 9 are conical, so that the strength of the short thorns 8 and the strength of the long thorns 9 are increased, and the short thorns 8 and the long thorns 9 are not easy to break.
The short thorns 8 and the long thorns 9 are alternately distributed on the bottom surface of the movable piece 4, and the length value of the short thorns 8 is smaller than that of the long thorns 9, so that the long thorns 9 and the short thorns 8 penetrate into the bridging 3 successively, the internal structure of the bridging 3 is changed twice continuously, and the bridging 3 is guaranteed to be broken.
The shape of the cross section of the conducting ring 6 is matched with the conducting cavity 5, the conducting ring 6 is limited, the conducting ring 6 can drive the moving part 4 to move up and down under the action of ampere force, a buffer cavity is formed between the top surface of the conducting ring 6 and the inner wall of the conducting cavity 5, and the moving part 4 cannot be broken when the heated volume of the conducting ring 6 is increased.
The conducting ring 6 is a ring cast by red copper, and by utilizing the good conductivity of the red copper, the induced current generated in the conducting ring 6 is increased, so that the ampere force applied to the conducting ring 6 is increased, the vertical movement amplitude of the moving part 4 is increased, the acting force of the short thorns 8 and the long thorns 9 on the bridge 3 in the descending process of the moving part 4 is increased, and the bridge 3 is ensured to be broken.
When the crucible furnace works, furnace burden is added into a crucible 1 firstly, a moving part 4 is placed into the crucible 1, then a vacuum system is started for vacuumizing, then a power supply of an induction coil 10 is switched on, alternating current passes through the induction coil 10, an alternating magnetic field is generated around the induction coil 10, conductive materials in the furnace generate induction potential under the action of the alternating magnetic field, so that eddy currents are formed on the surface of the furnace burden at a certain depth, then a large amount of heat is generated in the furnace burden under the action of the eddy currents, the furnace burden is melted to form molten metal 2, gaps among the furnace burden are filled with the molten metal 2 along with the gradual melting of the furnace burden, the liquid level of the molten metal 2 is gradually reduced, the upper part of the crucible 1 is blocked by the furnace burden to form a bridging 3, then the gravity of the moving part 4, a conducting ring 6, a short spine 8 and a long spine 9 is concentrated at the lower end of the long spine, the bridge 3 is automatically disintegrated and falls into the molten metal 2, after the long prick 9 pierces the bridge 3, the bridge 3 is not disintegrated, the short prick 8 pierces the bridge 3 under the action of gravity, the internal structure of the bridge 3 is further changed, the bridge 3 is automatically disintegrated and falls into the molten metal 2, meanwhile, an alternating magnetic field formed by the induction coil 10 penetrates through the moving part 4, an induction current is generated inside the conducting ring 6, the conducting ring 6 is subjected to alternating upward and downward Ampere force in the alternating magnetic field, the conducting ring 6 drives the moving part 4 to vibrate up and down under the action of the Ampere force, the short prick 8 and the long prick 9 repeatedly impact the bridge 3, the acting force of the short prick 8 and the long prick 9 on the bridge 3 is increased, the bridge 3 is opened without breaking the bridge manually, and the smelting efficiency is high.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an automatic device that breaks bridge for vacuum induction melting furnace, includes crucible (1), its characterized in that: the inside of crucible (1) is equipped with molten metal (2), the inside of crucible (1) is equipped with bridging (3) that is located molten metal (2) top, the inside of crucible (1) is equipped with moving part (4) that are located bridging (3) top, the inside of moving part (4) is equipped with electrically conductive chamber (5), the inside of electrically conductive chamber (5) is equipped with conducting ring (6), the inside of moving part (4) is equipped with cavity (7) that are located electrically conductive chamber (5) below, the bottom surface of crucible (1) is equipped with short thorn (8), the bottom surface of crucible (1) is equipped with long thorn (9), the outside of crucible (1) is equipped with induction coil (10).
2. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the movable piece (4) is annular, and the material of the movable piece (4) is the same as that of the crucible (1).
3. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the inner diameter value of the top of the moving piece (4) is larger than that of the bottom of the moving piece.
4. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the cross section of the conductive cavity (5) is trapezoidal.
5. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the short thorns (8) and the long thorns (9) are conical.
6. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the short thorns (8) and the long thorns (9) are alternately distributed on the bottom surface of the movable piece (4), and the length value of the short thorns (8) is smaller than that of the long thorns (9).
7. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the shape of the cross section of the conducting ring (6) is matched with that of the conducting cavity (5), and a buffer cavity is formed between the top surface of the conducting ring (6) and the inner wall of the conducting cavity (5).
8. The bridging automatic breaking device for the vacuum induction melting furnace as claimed in claim 1, wherein: the conducting ring (6) is a ring cast by red copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910030384.4A CN109737743B (en) | 2019-01-14 | 2019-01-14 | Automatic bridging breaking device for vacuum induction smelting furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910030384.4A CN109737743B (en) | 2019-01-14 | 2019-01-14 | Automatic bridging breaking device for vacuum induction smelting furnace |
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| CN109737743A CN109737743A (en) | 2019-05-10 |
| CN109737743B true CN109737743B (en) | 2020-04-14 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315204A (en) * | 1976-07-28 | 1978-02-10 | Hitachi Ltd | Slag removing apparatus in induction furnace |
| RU2026357C1 (en) * | 1987-11-24 | 1995-01-09 | Буканин Владимир Анатольевич | Method of use of induction crucible furnace for ferrocarbon process |
| JP3118976B2 (en) * | 1992-09-04 | 2000-12-18 | 富士電機株式会社 | Crucible induction furnace |
| JP2004044887A (en) * | 2002-07-11 | 2004-02-12 | Babcock Hitachi Kk | Monosilane combustion device and semiconductor flue gas treatment system |
| CN1712871A (en) * | 2005-06-30 | 2005-12-28 | 东北大学 | DC arc induction furnace |
| CN203881129U (en) * | 2013-12-02 | 2014-10-15 | 乳源瑶族自治县力强磁铁制品有限公司 | Vacuum induction melting furnace |
| CN207556261U (en) * | 2017-12-05 | 2018-06-29 | 江西师范高等专科学校 | A kind of Metal Melting device |
-
2019
- 2019-01-14 CN CN201910030384.4A patent/CN109737743B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315204A (en) * | 1976-07-28 | 1978-02-10 | Hitachi Ltd | Slag removing apparatus in induction furnace |
| RU2026357C1 (en) * | 1987-11-24 | 1995-01-09 | Буканин Владимир Анатольевич | Method of use of induction crucible furnace for ferrocarbon process |
| JP3118976B2 (en) * | 1992-09-04 | 2000-12-18 | 富士電機株式会社 | Crucible induction furnace |
| JP2004044887A (en) * | 2002-07-11 | 2004-02-12 | Babcock Hitachi Kk | Monosilane combustion device and semiconductor flue gas treatment system |
| CN1712871A (en) * | 2005-06-30 | 2005-12-28 | 东北大学 | DC arc induction furnace |
| CN203881129U (en) * | 2013-12-02 | 2014-10-15 | 乳源瑶族自治县力强磁铁制品有限公司 | Vacuum induction melting furnace |
| CN207556261U (en) * | 2017-12-05 | 2018-06-29 | 江西师范高等专科学校 | A kind of Metal Melting device |
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| CN109737743A (en) | 2019-05-10 |
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