CN203672124U - Vacuum induction melting furnace - Google Patents
Vacuum induction melting furnace Download PDFInfo
- Publication number
- CN203672124U CN203672124U CN201320731539.5U CN201320731539U CN203672124U CN 203672124 U CN203672124 U CN 203672124U CN 201320731539 U CN201320731539 U CN 201320731539U CN 203672124 U CN203672124 U CN 203672124U
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- cutting ferrule
- heater
- vacuum
- vavuum pump
- hole
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Abstract
The utility model relates to a vacuum induction melting furnace which comprises a furnace body, a medium-frequency coil connected with a medium-frequency control circuit, a vacuum pump and a vacuum pump control device connected with the vacuum pump. The medium-frequency coil is arranged in the furnace body. The vacuum pump is communicated with the furnace body through a pipeline. The vacuum pump control device comprises a vacuum pressure meter, an A/D conversion circuit, a single-chip microcomputer and a relay. The vacuum pressure meter is arranged on the furnace body. The signal output end of the vacuum pressure meter is connected with the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected with the input end of the single-chip microcomputer, the output end of the single-chip microcomputer is connected with the driving end of the relay, and a set of contact switches of the relay is connected to a power supply line of the vacuum pump in series. According to the vacuum induction melting furnace, metal inside the furnace is automatically melted in stages, meanwhile, a sealing structure of a vacuum bleed-off passage is improved, air leakage is effectively avoided, the melting effect is greatly improved, and it is guaranteed that high-quality metal materials can be obtained.
Description
Technical field
The utility model relates to a kind of smelting equipment, relates in particular to a kind of vacuum induction melting furnace.
Background technology
Current smelting furnace generally produces the magnetic line of force by intermediate frequency coil and is added on the alloy in body of heater, and alloy is heated up rapidly because of eddy current, realizes melting.Being mainly used in noble metal as melting and the temperature raising of the metal materials such as gold, platinum gold, silver, copper, iron, stainless steel, aluminium alloy and aluminium, is the capital equipment of laboratory in colleges and universities, research institute, jewelry processing and precision castings processing.Melting in air, due to the physical-chemical reaction of air participation fusion process, has limited the metallurgical effect that can obtain.For example, active metal is easy to oxidation, makes alloying component control difficulty; Metal bath and air work, and in alloy, air content is higher.This has just affected the performance of institute's smelting metal material greatly.
Summary of the invention
The utility model mainly solves original smelting furnace and adopts melting in air mode, affects the performance of institute's smelting metal material, and metallurgical effect is not very desirable technical problem; A kind of vacuum induction melting furnace is provided, and it adopts vacuum melting mode, can automatically carry out melting to metal in stove by stages again, improves metallurgical smelting effect, guarantees to obtain high-quality metal material.
Another object of the present utility model is to provide a kind of vacuum induction melting furnace, by improving hermetically-sealed construction, effectively avoids gas leakage, guarantees that the vacuum in body of heater reaches desired value, further improves Smelting Effect.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the utility model comprises body of heater, the intermediate frequency coil being connected with middle frequency control circuit, vavuum pump and the vavuum pump control device being connected with vavuum pump, intermediate frequency coil is located in body of heater, vavuum pump is communicated with by pipeline and described body of heater, described vavuum pump control device comprises pressure vacuum gauge, A/D change-over circuit, single-chip microcomputer and relay, pressure vacuum gauge is located on described body of heater, the signal output part of pressure vacuum gauge is connected with the input of A/D change-over circuit, the output of A/D change-over circuit is connected with the input of single-chip microcomputer, the output of single-chip microcomputer is connected with the drive end of relay, one group of contact switch of relay is connected in the supply line of described vavuum pump.By the operation of vavuum pump, make in body of heater in vacuum state, middle frequency control circuit produces middle frequency electromagnetic field by intermediate frequency coil, general frequency is 200～2500HZ, the intermediate frequency magnetic line of force is added on the alloy that needs melting in body of heater, makes alloy produce eddy current, thereby makes alloy self just can produce Joule heat, heat up rapidly, realize melting.Under vacuum state, the deoxidizing capacity of carbon can exceed silicon and aluminium, thereby improve melt-metallurgic effect, and can produce rare metal, refractory metal, rare earth metal, special alloy and high-quality steel that melting in air cannot be produced, institute's smelting metal kind is extensive, and in fusion process substantially without flame, also without combustion product, reach the object of energy-conserving and environment-protective.Measure in real time the vacuum in body of heater by pressure vacuum gauge, and flow to single-chip microcomputer after the conversion of A/D change-over circuit, send signal to relay by single-chip microcomputer through processing, control the start and stop of vavuum pump.In the time that vacuum in body of heater arrives the first setting value, vavuum pump is stopped transport, and stove in-vivo metal enters common smelt stage; After a period of time, start vavuum pump, in the time that vacuum in body of heater arrives the second setting value, vavuum pump is stopped transport, and stove in-vivo metal enters refining stage.Melting stage by stage, can further improve Smelting Effect.
As preferably, described body of heater is provided with body of heater joint, and the termination of the connecting line of described vavuum pump is provided with vacuum pump adapter, and body of heater joint is connected with vacuum pump adapter screw thread, is provided with double card seal between body of heater joint and vacuum pump adapter.Double card seal has good sealing effectiveness, avoids two joint junctions that gas leak phenomenon occurs, and guarantees that the vacuum in body of heater reaches desired value, further improves Smelting Effect.
As preferably, through hole in described vacuum pump adapter comprises connected hole, large footpath and diameter holes, hole, large footpath is connected by conical surface shoulder with diameter holes, described body of heater joint is screwed in described hole, large footpath, described double card seal comprises connected front cutting ferrule and rear cutting ferrule, front cutting ferrule is a cone with through hole, the rear portion of through hole is a conical bore, rear cutting ferrule is connected and forms with a cylinder by a cone, the center of rear cutting ferrule is provided with axis hole, the cone of rear cutting ferrule extend in the conical bore of front cutting ferrule and is connected with front cutting ferrule, gapped between the bottom surface of front cutting ferrule and the cylinder of rear cutting ferrule, the side of front cutting ferrule and described conical surface shoulder offset, the end face of the cylindrical rear end face of rear cutting ferrule and described body of heater joint offsets.When vacuum pump adapter is screwed onto on body of heater joint, extruding is spun, the front cutting ferrule of double card seal and the conical surface shoulder of vacuum pump adapter closely offset, thereafter the end face of cutting ferrule and body of heater joint closely offsets, while having avoided two joints to connect, junction produces gas leak phenomenon, improve sealing effectiveness, guarantee the vacuum in body of heater.
As preferably, the bottom surface diameter of described front cutting ferrule is less than the cylinder diameter of rear cutting ferrule.Make cylinder produce a larger pushing force to front cutting ferrule, deformation more easily occurs, improve sealing effectiveness.
As preferably, there is the individual conical surface in the aperture of described body of heater joint, and the cylindrical end face edge of described rear cutting ferrule is an inclined-plane, and the conical surface of described inclined-plane and described body of heater joint offsets.The structure that the conical surface and inclined-plane contact is guaranteed to fit tightr between the two, further improves sealing effectiveness.
The beneficial effects of the utility model are: adopt vacuum melting mode; automatically by stages metal in stove is carried out to melting; improve the hermetically-sealed construction of vacuum suction passage simultaneously; effectively avoid gas leakage, guarantee the vacuum in body of heater, greatly improve Smelting Effect; guarantee to obtain high-quality metal material; and in fusion process substantially without flame, also without combustion product, reach the object of energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is a kind of circuit theory syndeton block diagram of the utility model intermediate pump control device.
Fig. 3 is the axial sectional structure schematic diagram of the one of body of heater joint in the utility model, vacuum pump adapter and double card seal.
1. bodies of heater in figure, 2. intermediate frequency coil, 3. vavuum pump, 4. pressure vacuum gauge, 5.A/D change-over circuit, 6. single-chip microcomputer, 7. relay, 8. body of heater joint, 9. vacuum pump adapter, 10. double card seal, 11. front cutting ferrules, 12. rear cutting ferrules, 81. conical surfaces, 91. holes, large footpath, 92. diameter holes, 93. conical surface shoulders.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of vacuum induction melting furnace of the present embodiment, as shown in Figure 1, comprise intermediate frequency coil 2, the vavuum pump 3 that body of heater 1 is connected with middle frequency control circuit and the vavuum pump control device being connected with vavuum pump 3, intermediate frequency coil 2 is installed in body of heater 1, and vavuum pump 3 is communicated with by pipeline and body of heater 1.As shown in Figure 2, vavuum pump control device comprises pressure vacuum gauge 4, A/D change-over circuit 5, single-chip microcomputer 6 and relay 7, pressure vacuum gauge 4 is arranged on body of heater 1, the signal output part of pressure vacuum gauge 4 is connected with the input of A/D change-over circuit 5, the output of A/D change-over circuit 5 is connected with the input of single-chip microcomputer 6, the output of single-chip microcomputer 6 is connected with the drive end of relay 7, and one group of contact switch K of relay 7 is connected in the supply line of vavuum pump 3.On body of heater 1, have body of heater joint 8, there is vacuum pump adapter 9 termination of the connecting line of vavuum pump 3, and body of heater joint 8 is connected with vacuum pump adapter 9 screw threads, between body of heater joint 8 and vacuum pump adapter 9, double card seal 10 is installed.As shown in Figure 3, through hole in vacuum pump adapter 9 comprises connected hole 91, large footpath and diameter holes 92, hole 91, large footpath is connected by conical surface shoulder 93 with diameter holes 92, body of heater joint 8 is screwed in hole, large footpath 91, double card seal 10 comprises connected front cutting ferrule 11 and rear cutting ferrule 12, front cutting ferrule 11 is cones with through hole, the rear portion of through hole is a conical bore, rear cutting ferrule 12 is connected and forms with a cylinder by a cone, there is axis hole at rear cutting ferrule 12 center, the cone of rear cutting ferrule 12 extend in the conical bore of front cutting ferrule 11 and is connected with front cutting ferrule 11, gapped between the cylinder of the bottom surface of front cutting ferrule 11 and rear cutting ferrule 12, the cylinder diameter of rear cutting ferrule 12 is greater than the bottom surface diameter of front cutting ferrule 11, there is the individual conical surface 81 in the aperture of body of heater joint 8, the Shi Ge inclined-plane, cylindrical rear end face edge of rear cutting ferrule 12, the conical surface 81 of inclined-plane and body of heater joint 8 offsets, the side of front cutting ferrule 11 and conical surface shoulder 93 offset.
By the operation of vavuum pump, make in body of heater in vacuum state, middle frequency control circuit produces middle frequency electromagnetic field by intermediate frequency coil, general frequency is 200～2500HZ, the intermediate frequency magnetic line of force is added on the alloy that needs melting in body of heater, makes alloy produce eddy current, thereby makes alloy self just can produce Joule heat, heat up rapidly, realize melting.Realize the melting stage by stage of metal by vavuum pump control device, i.e. first common melting, then refining, Smelting Effect is better.Unique double card seal is arranged between body of heater joint and vacuum pump adapter, effectively avoids gas leakage, guarantees the vacuum in body of heater.The utility model improves Smelting Effect greatly, guarantees to obtain high-quality metal material, and in fusion process substantially without flame, also without combustion product, reach the object of energy-conserving and environment-protective.
Claims (5)
1. a vacuum induction melting furnace, it is characterized in that comprising body of heater (1), the intermediate frequency coil (2) being connected with middle frequency control circuit, vavuum pump (3) and the vavuum pump control device being connected with vavuum pump (3), intermediate frequency coil (2) is located in body of heater (1), vavuum pump (3) is communicated with by pipeline and described body of heater (1), described vavuum pump control device comprises pressure vacuum gauge (4), A/D change-over circuit (5), single-chip microcomputer (6) and relay (7), pressure vacuum gauge (4) is located on described body of heater (1), the signal output part of pressure vacuum gauge (4) is connected with the input of A/D change-over circuit (5), the output of A/D change-over circuit (5) is connected with the input of single-chip microcomputer (6), the output of single-chip microcomputer (6) is connected with the drive end of relay (7), one group of contact switch of relay (7) is connected in the supply line of described vavuum pump (3).
2. a kind of vacuum induction melting furnace according to claim 1, it is characterized in that described body of heater (1) is provided with body of heater joint (8), the termination of the connecting line of described vavuum pump (3) is provided with vacuum pump adapter (9), body of heater joint (8) is connected with vacuum pump adapter (9) screw thread, between body of heater joint (8) and vacuum pump adapter (9), is provided with double card seal (10).
3. a kind of vacuum induction melting furnace according to claim 2, it is characterized in that the through hole in described vacuum pump adapter (9) comprises connected hole, large footpath (91) and diameter holes (92), large hole, footpath (91) is connected by conical surface shoulder (93) with diameter holes (92), described body of heater joint (8) is screwed in described hole, large footpath (91), described double card seal (10) comprises connected front cutting ferrule (11) and rear cutting ferrule (12), front cutting ferrule (11) is a cone with through hole, the rear portion of through hole is a conical bore, rear cutting ferrule (12) is connected and forms with a cylinder by a cone, the center of rear cutting ferrule (12) is provided with axis hole, the cone of rear cutting ferrule (12) extend in the conical bore of front cutting ferrule (11) and is connected with front cutting ferrule (11), gapped between the cylinder of the bottom surface of front cutting ferrule (11) and rear cutting ferrule (12), the side of front cutting ferrule (11) and described conical surface shoulder (93) offset, the end face of the cylindrical rear end face of rear cutting ferrule (12) and described body of heater joint (8) offsets.
4. a kind of vacuum induction melting furnace according to claim 3, is characterized in that the cylinder diameter of described rear cutting ferrule (12) is greater than the bottom surface diameter of front cutting ferrule (11).
5. according to a kind of vacuum induction melting furnace described in claim 3 or 4, there is the individual conical surface (81) in the aperture that it is characterized in that described body of heater joint (8), the Shi Ge inclined-plane, cylindrical rear end face edge of described rear cutting ferrule (12), the conical surface (81) of described inclined-plane and described body of heater joint (8) offsets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320731539.5U CN203672124U (en) | 2013-11-18 | 2013-11-18 | Vacuum induction melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320731539.5U CN203672124U (en) | 2013-11-18 | 2013-11-18 | Vacuum induction melting furnace |
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| Publication Number | Publication Date |
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| CN203672124U true CN203672124U (en) | 2014-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320731539.5U Expired - Fee Related CN203672124U (en) | 2013-11-18 | 2013-11-18 | Vacuum induction melting furnace |
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| CN (1) | CN203672124U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792170A (en) * | 2015-04-10 | 2015-07-22 | 深圳市奥斯达新材料有限公司 | Vacuum pressure high-temperature electromagnetic heating smelting furnace system |
| CN109321261A (en) * | 2018-09-30 | 2019-02-12 | 江苏理工学院 | A kind of multi-mode microwave pyrolysis installation that vacuum degree can be constant |
-
2013
- 2013-11-18 CN CN201320731539.5U patent/CN203672124U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792170A (en) * | 2015-04-10 | 2015-07-22 | 深圳市奥斯达新材料有限公司 | Vacuum pressure high-temperature electromagnetic heating smelting furnace system |
| CN109321261A (en) * | 2018-09-30 | 2019-02-12 | 江苏理工学院 | A kind of multi-mode microwave pyrolysis installation that vacuum degree can be constant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangxi Xun Ke Electrical Appliances Co., Ltd Assignor: YIWU SUNTIFIC ELECTRICAL APPLIANCES CO., LTD. Contract record no.: 2015360000030 Denomination of utility model: Graphite crucible knotting and fixing method for vacuum induction melting furnace Granted publication date: 20140625 License type: Exclusive License Record date: 20150415 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20151118 |
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| EXPY | Termination of patent right or utility model |