CN2327695Y

CN2327695Y - Thin metal wire inductive heating device

Info

Publication number: CN2327695Y
Application number: CN98203875U
Authority: CN
Inventors: 冯伟年
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-04-27
Filing date: 1998-04-27
Publication date: 1999-07-07
Anticipated expiration: 2008-04-27

Abstract

The utility model provides a thin metal wire inductive heating device, which is composed of an unreeling wheel, a supporting frame wheel, a reeling wheel, a magnetic conductor, an excitation current carrying coil, an alternating variable frequency power supply, a supporting frame, and a metal wire. The utility model is characterized in that a loop is formed by the magnetic field produced by the excitation current carrying coil (3) through the magnetic conductor (2), a magnetic field loop which is formed by the field direction of the metal wire (1) or formed in the surroundings of the metal wire (1) is perpendicular to the axial direction of the metal wire, the diameter of the metal wire (1) is not greater than 12 mm, and a nonconductor sleeve pipe (4) which goes through the metal wire is arranged between the magnetic conductor (2) and the excitation current carrying coil (3). The utility model has the advantages of little energy loss, high thermal efficiency, and high heating temperature. A low frequency power supply can be used for the thin metal wire inductive heating.

Description

A kind of fine wire induction heating device

The utility model relates to a kind of thermal treatment unit wiry, especially relates to a kind of induction heating device wiry.

Usually cylinder type metal is to carry out induction heating in longitudinal magnetic field, magnetic plug or Circumferential coils are placed in the outside at metal cylinder, when coil feeds exchange current, the eddy current that metal cylinder produces is along cylindrical circumferential direction, decay gradually to the center by the surface, and the inducedmagnetic field that produces is parallel with the axis of metal cylinder, the eddy current that is produced is directly proportional with the frequency of cylindrical diameter and electric current, so the more little heating of diameter is difficult more, in addition, also, be difficult to be coupled effectively between coil and the fine wire owing to the magnetic plug manufacturing technology, efficient is very low, so induction heating technique is difficult to be applied to effectively fine wire.In addition, owing to need high frequency electric source, power loss is bigger.

It is few that goal of the invention of the present utility model provides a kind of magnetic energy loss, and thermo-efficiency and Heating temperature height can use the thermal treatment unit that carries out the fine wire induction heating than low-frequency power.

To achieve these goals, the utility model provides a kind of fine wire induction heating device, by the actinobacillus wheel that is fixed on the frame, guide roller, take-up reel, induction heater, the alternation variable-frequency power sources, resting support and wire are formed, described wire is through actinobacillus wheel, guide roller closes at take-up reel after passing described induction heater, described induction heater is by magnetizer, excitation current-carrying coil and wire are formed, the two ends of excitation current-carrying coil connect with described power supply, the magnetic field that its characteristics are to be produced by the excitation current-carrying coil is through magnetizer guiding formation loop, by described field direction wiry or vertical with the wire axis direction at the field circuit of wire formation on every side; The little sub-12mm of described diameter wiry; Also be equipped with one and have high temperature resistant and non-conductor sleeve pipe heat-insulating property in the middle of magnetic conductor and excitation current-carrying coil, wire passes described sleeve pipe.

Above-mentioned induction heating device, its characteristics are that described magnetic conductor is involuted by 2 mountain font magnetic poles, and magnetic pole post disconnects in the middle of it, leaves the clearance; Sleeve pipe is installed in the middle of described gap and passes the heated wire of described telescopic; The excitation current-carrying coil is wrapped on upper and lower two the magnetic pole posts of intermediary, but and serial or parallel connection; Above-mentioned induction heating device, its characteristics are that described magnetic conductor is made up of at least one group of Qian shape magnetic pole of relatively installing, separate in the middle of it, leave the clearance, parallelly in the middle of described gap sleeve pipe is installed and passes the heated wire of described telescopic, the excitation current-carrying coil is wrapped on described polar both sides or the four limit magnetic pole posts, and the hand of spiral is identical; Above-mentioned induction heating device, its characteristics are that described magnetic conductor is made up of one group of square shape magnetic pole, and the excitation current-carrying coil is wrapped on the magnetic pole post of the polar both sides of square shape, and magnetic field forms airtight magnetic loop in described magnetic pole; Sleeve pipe is installed and passes the heated wire of described telescopic at described square shape pole center; Above-mentioned induction heating device, its characteristics are that described magnetic conductor is involuted by 2 groups of Contraband font magnetic poles, separately, leave the clearance in the middle of it, sleeve pipe is installed in the middle of described gap and passes the heated wire of described telescopic; The excitation current-carrying coil is installed in the polar inboard of described Contraband font and is parallel to described wire, and the sense of current that the current in the wire both sides passes through in opposite directions; In described Contraband font magnetic pole, respectively form one all by described wire magnetic loop.

The diameter wiry that above-mentioned induction heating device, its characteristics are to be heated to more than 1000 ℃ is not more than 6mm.

Above-mentioned induction heating device, its characteristics are to feed in described sleeve pipe shielding gas.

Adopt the device of said structure, inducedmagnetic field and axis normal wiry, the electric current that induction produces in the wire forms loop line along axis direction, the transmission of electromagnetic energy is to decay along axis direction, because the direction of magnetic field and electric field has all turned over 90 °, make that faradic loop area greatly increases in the wire, increased the apparent geometric diameter in loop, strengthened swirl number.Therefore can be with more than the lower frequency power efficient ground induction heating fine wire to 1000 ℃ or other temperature of processing requirement.

Further specify embodiment of the present utility model below in conjunction with accompanying drawing

Fig. 1 is the utility model induction heating device structural representation

Fig. 2 is a kind of acyclic type induction heating device principle schematic

Fig. 3 is a kind of multipolar system induction heating device principle schematic

Fig. 4 is a kind of single loop induction heating device principle schematic

Fig. 5 is a kind of double loop induction heating device principle schematic

A fine wire induction heating device that embodiment adopted of utility model mainly is made up of actinobacillus wheel, guide roller, take-up reel, tension controller, electric motor, induction heater, alternation variable-frequency power sources, resting support and wire 1.In Fig. 1, induction heater is made up of magnetizer 2, excitation current-carrying coil 3, sleeve pipe 4 and wire 1, the two ends of excitation current-carrying coil 3 connect with the alternation variable-frequency power sources, the magnetic field that is produced by excitation current-carrying coil 3 forms magnetic loop through magnetizer 2 guiding, and is vertical with the wire axis direction by the field direction of wire 1.The diameter of this wire 1 is particularly suited for the wire less than 6mm for generally being not more than 12mm.Sleeve pipe 4 is installed in the centre of magnetic conductor 2, and wire passes sleeve pipe 4.Sleeve pipe 4 has high temperature resistant and insulativity material high heat preservation performance for a kind of.Wire 1 moves on the central axis of sleeve pipe 4 under the tension force effect of actinobacillus wheel and take-up reel continuously, and wire 1 can be heated to more than 1000 ℃ in continuous moving process.

The induction heater that the utility model adopted can adopt following several organization plan;

At the acyclic type induction heater shown in Fig. 2, its magnetic conductor 2 is by 2 involutory fusing of mountain font magnetic pole, the intermediate magnetic pole separately, leave the clearance, sleeve pipe 4 and wire 1 are installed in the middle of the gap, but excitation current-carrying coil 3 is wrapped on upper and lower two the magnetic pole posts of intermediary and serial or parallel connection, and two induced field directions of coil are identical, form the single magnetic circuit that vertically passes wire 1.

At the multipole induction heater shown in Fig. 3, its magnetic conductor 2 is made up of the Qian shape magnetic poles of one group or two groups relative installation, separate in the middle of it, leave the clearance, parallel sleeve pipe 4 and the wire 1 of being equipped with in the middle of the gap, excitation current-carrying coil 3 is wrapped on the both sides or four limit magnetic pole posts on the magnetic conductor 2, and the hand of spiral is identical, and both sides constitute the identical stack magnetic circuit of direction vertically by wire 1 like this.Adopt in this structure magnetic loop yoke less.

At the single loop inductor block shown in Fig. 4, its magnetic conductor 2 is made up of one group of square shape magnetic pole, and excitation current-carrying coil 3 is wrapped on the magnetic pole post of the polar both sides of square shape, and magnetic field forms airtight magnetic loop in magnetic pole, and pole center is equipped with sleeve pipe 4 and wire 1.The characteristics of this inductor block are there is not the clearance in the magnetic circuit, and wire is not passed through in the vertical loop that magnetic field forms around wire.

At the double loop induction heater shown in Fig. 5, its magnetic conductor 2 is involuted by 2 groups of Contraband font magnetic poles, separate in the middle of it, leave the clearance, sleeve pipe 4 and wire 1 are installed in the middle of the gap, excitation current-carrying coil 3 is installed in the polar inboard of Contraband font and is parallel to wire 1, the sense of current that the current in wire 1 both sides passes through in opposite directions, the Contraband font magnetic pole in wire 1 both sides has constituted vertical by wire 1 stack magnetic circuit.

The induction heater that the utility model adopts because magnetic field and wire 1 is axial vertical, has increased the apparent geometric diameter of heating zone, has produced bigger eddy current, and the while can use lower power frequency to heat.Save facility investment, improved heating efficiency.

In Fig. 3, owing to reduced the clearance in the magnetic circuit, reduce magnetizing current, improve the heating inductor power factor, reduced energy consumption, saved energy effectively.

In addition,, reduced the thermosteresis of heating of metal silk, prevented to be short-circuited between wire 1 and the magnetic pole, in sleeve pipe 4, can realize the light heating of non-oxidation, tax carbon by protective atmosphere owing in magnetic conductor, be provided with sleeve pipe 4.

The utility model can be used for quenching austenitizing wiry heating, tempering, the middle recrystallization annealing of cold working, normalizing, underrelaxation processing and hot dip process heating or the like.

Claims

1, a kind of fine wire induction heating device, by the actinobacillus wheel that is fixed on the frame, guide roller, take-up reel, induction heater, the alternation variable-frequency power sources, resting support and wire are formed, described wire is through actinobacillus wheel, guide roller closes at take-up reel after passing described induction heater, described induction heater is by magnetizer, excitation current-carrying coil and wire are formed, the two ends of excitation current-carrying coil connect with described power supply, the magnetic field that it is characterized in that being produced by excitation current-carrying coil (3) is through magnetizer (2) guiding formation loop, and field direction by described wire (1) or the field circuit that forms on every side at wire (1) are vertical with the wire axis direction; The diameter of described wire (1) is not more than 12mm, also is equipped with one and has high temperature resistant and non-conductor sleeve pipe (4) heat-insulating property in the middle of magnetic conductor (2) and excitation current-carrying coil (3), and wire (1) passes described sleeve pipe (4).

2, induction heating device according to claim 1 is characterized in that described magnetic conductor (2) is involuted by 2 mountain font magnetic poles, and magnetic pole post disconnects in the middle of it, leaves the clearance; The middle heated wire (1) that sleeve pipe (4) is installed and passes described sleeve pipe (4) in described gap; Excitation current-carrying coil (3) is wrapped on upper and lower two the magnetic pole posts of intermediary, but and serial or parallel connection.

3, induction heating device according to claim 1, it is characterized in that described magnetic conductor (2) is made up of at least one group of Qian shape magnetic pole of relatively installing, separate in the middle of it, leave the clearance, the parallel heated wire (1) that sleeve pipe (4) is installed and passes described sleeve pipe (4) in the middle of described gap, excitation current-carrying coil (3) is wrapped on described polar both sides or the four limit magnetic pole posts, and the hand of spiral is identical.

4, induction heating device according to claim 1, it is characterized in that described magnetic conductor (2) is made up of one group of square shape magnetic pole, excitation current-carrying coil (3) is wrapped on the magnetic pole post of the polar both sides of square shape, and magnetic field forms airtight magnetic loop in described magnetic pole; Sleeve pipe (4) is installed and passes the heated wire (1) of described sleeve pipe (4) at described square shape pole center.

5, induction heating device according to claim 1, it is characterized in that described magnetic conductor (2) is involuted by 2 groups of Contraband font magnetic poles, separately, leave the clearance in the middle of it, the middle heated wire (1) that sleeve pipe (4) is installed and passes described sleeve pipe (4) in described gap; Excitation current-carrying coil (3) is installed in the polar inboard of described Contraband font and is parallel to described wire (1), and the sense of current that the current in wire (1) both sides passes through in opposite directions; In described Contraband font magnetic pole, respectively form one all by described wire (1) magnetic loop.

6, according to claim 1,2,3,4 or 5 described induction heating devicees, the diameter wiry that it is characterized in that being heated to more than 1000 ℃ is not more than 6mm.

7,, it is characterized in that feeding has shielding gas in described sleeve pipe (4) according to claim 1,2,3,4 or 5 described induction heating devicees.

8, induction heating device according to claim 7, the diameter wiry that it is characterized in that being heated to more than 1000 ℃ is not more than 6mm.