CN202861351U

CN202861351U - Rhombic tooth type electromagnetic stirrer

Info

Publication number: CN202861351U
Application number: CN 201220510343
Authority: CN
Inventors: 陈汉生; 杨红
Original assignee: CHINA CHANGJIANG NATIONAL SHIPPING GROUP MOTOR FACTORY
Current assignee: CHINA CHANGJIANG NATIONAL SHIPPING GROUP MOTOR FACTORY
Priority date: 2012-10-08
Filing date: 2012-10-08
Publication date: 2013-04-10
Anticipated expiration: 2022-10-08

Abstract

The utility model relates to a stirrer, and particularly relates to a rhombic tooth type electromagnetic stirrer. The rhombic tooth type electromagnetic stirrer comprises a hollow inner cylinder, an iron core is sleeved on the outer side of the inner cylinder, an outer shell is sleeved on the outer side of the iron core, a copper conductive wire coil is wound on the iron core, the iron core comprises an outer layer annular magnet yoke and inner layer magnetic poles evenly distributed on the magnet yoke, the magnetic poles are of a tooth-shaped structure protruding inwards in a spaced mode, and the copper conductive wire coil is arranged on the magnetic poles. The center of a magnetic field generated by the stirrer is misaligned with the center of casting blank with an eccentricity of a certain distance, the center of the magnetic field and the center of the casting blank are from being aligned to being misaligned and again to being aligned, liquid steel grains are enabled to make reciprocating 'half-spiral' type rotary stirring in a range, the heat exchange efficiency is high, and the homogenization of temperature gradient is favored.

Description

Water chestnut flute profile magnetic stirrer

Technical field

The utility model relates to a kind of agitator, particularly relates to a kind of water chestnut flute profile magnetic stirrer.

Background technology

Metallurgical continuous casting electromagnetic mixing apparatus improves the continuous casting billet quality greatly owing to can effectively improve continuous casting billet surface, subcutaneous and center mass, is widely used on the conticaster.At present existing magnetic stirrer is consulted illustrated in figures 1 and 2, consisted of by the winding 2 on shell 1, inner core 4, iron core 3 and the iron core 3, shell 1, iron core 3 and inner core are annular, and iron core 3 adopts conventional " E " type magnetic pole, supports the use in be everlasting arc continuous casting or the horizontal casting.In arc continuous casting, the continuity direction that the suffered gravity of the crystal grain in the casting blank solidification process and strand form the base shell has certain angle; And in horizontal caster, the suffered gravity of the crystal grain in the casting blank solidification process and strand form the continuity perpendicular direction of base shell, so that the concentration zones of crystal grain has certain " off-centre " with respect to the strand center.Therefore, above-mentioned two situations have caused with the strand center has almost carried out " off-centre " stirring to strand in the magnetic field of concentric magnetic stirrer formation of installing and using, and has reached the effect of alleviating the strand thermograde, has improved slab quality.

For vertical casting machine, the suffered gravity of crystal grain in the casting blank solidification process is consistent with the continuity direction that strand forms the base shell, can't form similar " off-centre ", existing " E " type magnetic pole electromagnetic agitation can only make crystal grain carry out the circumference Stirring at concentric circles, can't or be difficult to play the effect of alleviating the strand thermograde.

Vertical casting machine is in casting process, there is hardly geometric eccentricity between strand liquid core center and the casting blank outer cover, if use existing magnetic stirrer, under the excitation field effect, the electromagnetic force stirring molten steel that generates is done the equivalent circular circumference and is rotatablely moved, make strand liquid core central temperature can only lean on equivalent circumference gradient to carry out laterally step by step heat and transmit, heat transference efficiency is very low, can't make strand liquid core be tending towards Isothermal Condition and reduces the degree of superheat and realize low temperature continuous casting.

Summary of the invention

The purpose of this utility model is in order to overcome defects, provides a kind of and can alleviate strand thermograde, water chestnut flute profile magnetic stirrer that strand liquid core central hot transmission efficiency is high.

For achieving the above object, a kind of water chestnut flute profile magnetic stirrer of the utility model design, the inner core that comprises hollow, the described inner core outside is arranged with iron core, and the described iron core outside is arranged with shell, is wound with the copper conductor winding on the described iron core, described iron core comprises the outer annular yoke, and be evenly distributed on internal layer magnetic pole on the yoke, and described magnetic pole is the tooth-shape structure of inside space protrusion, described copper conductor winding is arranged on the described magnetic pole.

In technique scheme, described magnetic pole is provided with four or six.

In technique scheme, described copper conductor winding is that real core flat type copper wire or hollow copper pipe hook become.

In technique scheme, be the inclination angle between the inner surface of described magnetic pole and described yoke.

The magnetic stirrer that utility model provides, adopted " water chestnut flute profile " core structure, dentiform magnetic pole evenly or be symmetrically distributed on the yoke, and copper cash wire winding is fixed on the magnetic pole, the center in the magnetic field of agitator generation does not overlap with the strand center like this, there is certain distance eccentric, the center in magnetic field and strand center be or not again to coincidence from overlapping of cycle at the volley, make molten steel crystal grain in the interval, do back and forth " semi-spiral " formula Stirring, heat exchanger effectiveness is high, is beneficial to the thermograde homogenising.

Description of drawings

Fig. 1 is prior art magnetic stirrer cutaway view;

Fig. 2 is that the A-A of Fig. 1 is to cutaway view;

Fig. 3 is the magnetic stirrer cutaway view of the utility model embodiment 1;

Fig. 4 is that the B-B of Fig. 3 is to cutaway view;

Fig. 5 is the magnetic stirrer cutaway view of the utility model embodiment 2;

Fig. 6 is that the B-B of Fig. 5 is to cutaway view;

Among the figure: the 1-shell; 2-copper conductor winding; 3-iron core (31-yoke; The 32-magnetic pole); The 4-inner core.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Embodiment 1

Water chestnut flute profile magnetic stirrer as shown in Figure 3 and Figure 4, the inner core 4 that comprises hollow, inner core 4 outsides are arranged with iron core 3, iron core 3 outsides are arranged with shell 1, be wound with copper conductor winding 2 on the iron core 3, iron core 3 comprises outer annular yoke 31, and is evenly distributed on the internal layer magnetic pole 32 on the yoke 31, magnetic pole 32 is the tooth-shape structure of inside space protrusion, and copper conductor winding 2 is arranged on the magnetic pole 32.Copper conductor winding 2 is that real core flat type copper wire or hollow copper pipe hook become.Magnetic pole 32 is provided with six, is the inclination angle between the inner surface of magnetic pole 32 and yoke 31, and iron core 3 is made of two forward and reverse overlaying structures, forms the diamond structure limit from adjacent two magnetic pole 32 middles after iron core 3 laminates, and iron core 3 monnolithic cases are unidirectional diamond shaped.

Embodiment 2

Water chestnut flute profile magnetic stirrer as shown in Figure 5 and Figure 6, the inner core 4 that comprises hollow, inner core 4 outsides are arranged with iron core 3, iron core 3 outsides are arranged with shell 1, be wound with copper conductor winding 2 on the iron core 3, iron core 3 comprises outer annular yoke 31, and is evenly distributed on the internal layer magnetic pole 32 on the yoke 31, magnetic pole 32 is the tooth-shape structure of inside space protrusion, and copper conductor winding 2 is arranged on the magnetic pole 32.Copper conductor winding 2 is that real core flat type copper wire or hollow copper pipe hook become.Magnetic pole 32 is provided with six, is the inclination angle between the inner surface of magnetic pole 32 and yoke 31, and iron core 3 is made of two forward and reverse overlaying structures, and iron core 3 forms the diamond structure limit from the midline of magnetic pole 32 width, and iron core 3 above-below directions are positive antisymmetry diamond shaped.

Certainly, the diamond structure of iron core 3 can form a certain type rhombus core structure from the arbitrary position between the midline of adjacent two magnetic pole 32 middles and magnetic pole 32 width.

Copper conductor winding 2 can adopt every layer of number of turn consistent, also can adopt every layer line circle to successively decrease or incremental according to the space of 32 of rhombus magnetic poles.During copper conductor winding 2 coil working, copper conductor winding 2 magnetic field centers on the magnetic pole 32 move to water chestnut flute profile agitator magnetic fields center by agitator shell geometric center, the magnetic field center of agitator generation does not overlap with the strand center like this, there is certain distance eccentric, the cycle makes molten steel crystal grain do back and forth " semi-spiral " formula Stirring in the interval by overlapping to overlapping again at the volley for magnetic field center and strand center.Heat exchanger effectiveness is high, is beneficial to the thermograde homogenising.Magnetic stirrer of the present utility model is fit to use with the electromagnetic agitation in vertical casting machine or the vertical casting machine.

The content that is not described in detail in this specification belongs to the known prior art of this area professional and technical personnel.

Claims

1. water chestnut flute profile magnetic stirrer, the inner core (4) that comprises hollow, described inner core (4) outside is arranged with iron core (3), described iron core (3) outside is arranged with shell (1), be wound with copper conductor winding (2) on the described iron core (3), it is characterized in that: described iron core (3) comprises outer annular yoke (31), and be evenly distributed on internal layer magnetic pole (32) on the yoke (31), described magnetic pole (32) is the tooth-shape structure of inside space protrusion, and described copper conductor winding (2) is arranged on the described magnetic pole (32).

2. water chestnut flute profile magnetic stirrer according to claim 1, it is characterized in that: described magnetic pole (32) is provided with four or six.

3. water chestnut flute profile magnetic stirrer according to claim 1 is characterized in that: described copper conductor winding (2) becomes for real core flat type copper wire or hollow copper pipe hook.

4. water chestnut flute profile magnetic stirrer according to claim 1 is characterized in that: be the inclination angle between the inner surface of described magnetic pole (32) and described yoke (31).